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authornobody <>2002-05-28 18:43:09 +0000
committernobody <>2002-05-28 18:43:09 +0000
commit0d49dda2de4c1fd23c87348f08a022bfd3ee3334 (patch)
tree592db3a187b7a55a25aa6d5e4df1f3326d298165 /bfd/elflink.h
parent0540f4547886519cdcf972d171961c0b6a33e02e (diff)
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This commit was manufactured by cvs2svn to create branch
'kseitz_interps-20020528-branch'. Sprout from cagney_regbuf-20020515-branch 2002-05-15 21:19:22 UTC nobody 'This commit was manufactured by cvs2svn to create branch' Cherrypick from master 2002-05-28 18:43:08 UTC Jason Thorpe <thorpej@netbsd.org> '* ppcnbsd-nat.c: Rewrite.': gdb/ChangeLog gdb/Makefile.in gdb/mi/mi-main.c Delete: .cvsignore COPYING COPYING.LIB COPYING.NEWLIB ChangeLog MAINTAINERS Makefile.in README README-maintainer-mode bfd/COPYING bfd/ChangeLog bfd/ChangeLog-0001 bfd/ChangeLog-9193 bfd/ChangeLog-9495 bfd/ChangeLog-9697 bfd/ChangeLog-9899 bfd/MAINTAINERS bfd/Makefile.am bfd/Makefile.in bfd/PORTING bfd/README bfd/TODO bfd/acinclude.m4 bfd/aclocal.m4 bfd/aix386-core.c bfd/aix5ppc-core.c bfd/aout-adobe.c bfd/aout-arm.c bfd/aout-cris.c bfd/aout-encap.c bfd/aout-ns32k.c bfd/aout-sparcle.c bfd/aout-target.h bfd/aout-tic30.c bfd/aout0.c bfd/aout32.c bfd/aout64.c bfd/aoutf1.h bfd/aoutx.h bfd/archive.c bfd/archive64.c bfd/archures.c bfd/armnetbsd.c bfd/bfd-in.h bfd/bfd-in2.h bfd/bfd.c bfd/binary.c bfd/bout.c bfd/cache.c bfd/cf-i386lynx.c bfd/cf-m68klynx.c bfd/cf-sparclynx.c bfd/cisco-core.c bfd/coff-a29k.c bfd/coff-alpha.c bfd/coff-apollo.c bfd/coff-arm.c bfd/coff-aux.c bfd/coff-go32.c bfd/coff-h8300.c bfd/coff-h8500.c bfd/coff-i386.c bfd/coff-i860.c bfd/coff-i960.c bfd/coff-ia64.c bfd/coff-m68k.c bfd/coff-m88k.c bfd/coff-mcore.c bfd/coff-mips.c bfd/coff-or32.c bfd/coff-pmac.c bfd/coff-ppc.c bfd/coff-rs6000.c bfd/coff-sh.c bfd/coff-sparc.c bfd/coff-stgo32.c bfd/coff-svm68k.c bfd/coff-tic30.c bfd/coff-tic54x.c bfd/coff-tic80.c bfd/coff-u68k.c bfd/coff-w65.c bfd/coff-we32k.c bfd/coff-z8k.c bfd/coff64-rs6000.c bfd/coffcode.h bfd/coffgen.c bfd/cofflink.c bfd/coffswap.h bfd/config.bfd bfd/config.in bfd/configure bfd/configure.com bfd/configure.host bfd/configure.in bfd/corefile.c bfd/cpu-a29k.c bfd/cpu-alpha.c bfd/cpu-arc.c bfd/cpu-arm.c bfd/cpu-avr.c bfd/cpu-cris.c bfd/cpu-d10v.c bfd/cpu-d30v.c bfd/cpu-fr30.c bfd/cpu-h8300.c bfd/cpu-h8500.c bfd/cpu-hppa.c bfd/cpu-i370.c bfd/cpu-i386.c 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gdb/config/m68k/nm-apollo68v.h gdb/config/m68k/nm-delta68.h gdb/config/m68k/nm-dpx2.h gdb/config/m68k/nm-hp300bsd.h gdb/config/m68k/nm-hp300hpux.h gdb/config/m68k/nm-linux.h gdb/config/m68k/nm-m68klynx.h gdb/config/m68k/nm-nbsd.h gdb/config/m68k/nm-sun2.h gdb/config/m68k/nm-sun3.h gdb/config/m68k/nm-sysv4.h gdb/config/m68k/os68k.mt gdb/config/m68k/st2000.mt gdb/config/m68k/sun2os3.mh gdb/config/m68k/sun2os3.mt gdb/config/m68k/sun2os4.mh gdb/config/m68k/sun2os4.mt gdb/config/m68k/sun3os3.mh gdb/config/m68k/sun3os3.mt gdb/config/m68k/sun3os4.mh gdb/config/m68k/sun3os4.mt gdb/config/m68k/tm-3b1.h gdb/config/m68k/tm-apollo68b.h gdb/config/m68k/tm-cisco.h gdb/config/m68k/tm-delta68.h gdb/config/m68k/tm-dpx2.h gdb/config/m68k/tm-es1800.h gdb/config/m68k/tm-hp300bsd.h gdb/config/m68k/tm-hp300hpux.h gdb/config/m68k/tm-linux.h gdb/config/m68k/tm-m68k.h gdb/config/m68k/tm-m68klynx.h gdb/config/m68k/tm-m68kv4.h gdb/config/m68k/tm-mac.h gdb/config/m68k/tm-monitor.h gdb/config/m68k/tm-nbsd.h 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gdb/config/mcore/mcore.mt gdb/config/mcore/tm-mcore.h gdb/config/mips/bigmips.mt gdb/config/mips/bigmips64.mt gdb/config/mips/decstation.mh gdb/config/mips/decstation.mt gdb/config/mips/embed.mt gdb/config/mips/embed64.mt gdb/config/mips/embedl.mt gdb/config/mips/embedl64.mt gdb/config/mips/irix3.mh gdb/config/mips/irix3.mt gdb/config/mips/irix4.mh gdb/config/mips/irix5.mh gdb/config/mips/irix5.mt gdb/config/mips/irix6.mh gdb/config/mips/irix6.mt gdb/config/mips/linux.mh gdb/config/mips/linux.mt gdb/config/mips/littlemips.mh gdb/config/mips/littlemips.mt gdb/config/mips/mipsm3.mh gdb/config/mips/mipsm3.mt gdb/config/mips/mipsv4.mh gdb/config/mips/mipsv4.mt gdb/config/mips/news-mips.mh gdb/config/mips/nm-irix3.h gdb/config/mips/nm-irix4.h gdb/config/mips/nm-irix5.h gdb/config/mips/nm-irix6.h gdb/config/mips/nm-linux.h gdb/config/mips/nm-mips.h gdb/config/mips/nm-news-mips.h gdb/config/mips/nm-riscos.h gdb/config/mips/riscos.mh gdb/config/mips/tm-bigmips.h gdb/config/mips/tm-bigmips64.h gdb/config/mips/tm-embed.h gdb/config/mips/tm-embed64.h gdb/config/mips/tm-embedl.h gdb/config/mips/tm-embedl64.h gdb/config/mips/tm-irix3.h gdb/config/mips/tm-irix5.h gdb/config/mips/tm-irix6.h gdb/config/mips/tm-linux.h gdb/config/mips/tm-mips.h gdb/config/mips/tm-mips64.h gdb/config/mips/tm-mipsm3.h gdb/config/mips/tm-mipsv4.h gdb/config/mips/tm-tx39.h gdb/config/mips/tm-tx39l.h gdb/config/mips/tm-vr4100.h gdb/config/mips/tm-vr4300.h gdb/config/mips/tm-vr4300el.h gdb/config/mips/tm-vr4xxx.h gdb/config/mips/tm-vr4xxxel.h gdb/config/mips/tm-vr5000.h gdb/config/mips/tm-vr5000el.h gdb/config/mips/tm-vxmips.h gdb/config/mips/tm-wince.h gdb/config/mips/tx39.mt gdb/config/mips/tx39l.mt gdb/config/mips/vr4100.mt gdb/config/mips/vr4300.mt gdb/config/mips/vr4300el.mt gdb/config/mips/vr4xxx.mt gdb/config/mips/vr4xxxel.mt gdb/config/mips/vr5000.mt gdb/config/mips/vr5000el.mt gdb/config/mips/vxmips.mt gdb/config/mips/wince.mt gdb/config/mips/xm-irix3.h gdb/config/mips/xm-irix4.h gdb/config/mips/xm-irix5.h gdb/config/mips/xm-irix6.h gdb/config/mips/xm-linux.h gdb/config/mips/xm-mips.h gdb/config/mips/xm-mipsm3.h gdb/config/mips/xm-mipsv4.h gdb/config/mips/xm-riscos.h gdb/config/mn10200/mn10200.mt gdb/config/mn10200/tm-mn10200.h gdb/config/mn10300/mn10300.mt gdb/config/nm-gnu.h gdb/config/nm-linux.h gdb/config/nm-lynx.h gdb/config/nm-m3.h gdb/config/nm-nbsd.h gdb/config/nm-sysv4.h gdb/config/none/nm-none.h gdb/config/none/none.mh gdb/config/none/none.mt gdb/config/none/tm-none.h gdb/config/none/xm-none.h gdb/config/ns32k/nbsd.mh gdb/config/ns32k/nbsd.mt gdb/config/ns32k/nm-nbsd.h gdb/config/ns32k/tm-nbsd.h gdb/config/ns32k/tm-umax.h gdb/config/ns32k/xm-nbsd.h gdb/config/pa/hppa64.mt gdb/config/pa/hppabsd.mh gdb/config/pa/hppabsd.mt gdb/config/pa/hppahpux.mh gdb/config/pa/hppahpux.mt gdb/config/pa/hppaosf.mh gdb/config/pa/hppaosf.mt gdb/config/pa/hppapro.mt gdb/config/pa/hpux1020.mh gdb/config/pa/hpux1020.mt gdb/config/pa/hpux11.mh gdb/config/pa/hpux11.mt gdb/config/pa/hpux11w.mh gdb/config/pa/hpux11w.mt gdb/config/pa/nm-hppab.h gdb/config/pa/nm-hppah.h gdb/config/pa/nm-hppah11.h gdb/config/pa/nm-hppao.h gdb/config/pa/tm-hppa.h gdb/config/pa/tm-hppa64.h gdb/config/pa/tm-hppab.h gdb/config/pa/tm-hppah.h gdb/config/pa/tm-hppao.h gdb/config/pa/tm-pro.h gdb/config/pa/xm-hppab.h gdb/config/pa/xm-hppah.h gdb/config/pa/xm-pa.h gdb/config/powerpc/aix.mh gdb/config/powerpc/aix.mt gdb/config/powerpc/gdbserve.mt gdb/config/powerpc/linux.mh gdb/config/powerpc/linux.mt gdb/config/powerpc/nbsd.mh gdb/config/powerpc/nbsd.mt gdb/config/powerpc/nm-aix.h gdb/config/powerpc/nm-linux.h gdb/config/powerpc/nm-nbsd.h gdb/config/powerpc/ppc-eabi.mt gdb/config/powerpc/ppc-sim.mt gdb/config/powerpc/ppcle-eabi.mt gdb/config/powerpc/ppcle-sim.mt gdb/config/powerpc/tm-linux.h gdb/config/powerpc/tm-nbsd.h gdb/config/powerpc/tm-ppc-aix.h gdb/config/powerpc/tm-ppc-eabi.h gdb/config/powerpc/tm-ppc-sim.h gdb/config/powerpc/tm-ppcle-eabi.h 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gdb/config/sh/wince.mt gdb/config/sparc/fbsd.mh gdb/config/sparc/fbsd.mt gdb/config/sparc/linux.mh gdb/config/sparc/linux.mt gdb/config/sparc/nbsd.mh gdb/config/sparc/nbsd.mt gdb/config/sparc/nbsdelf.mh gdb/config/sparc/nm-fbsd.h gdb/config/sparc/nm-linux.h gdb/config/sparc/nm-nbsd.h gdb/config/sparc/nm-nbsdelf.h gdb/config/sparc/nm-sparclynx.h gdb/config/sparc/nm-sun4os4.h gdb/config/sparc/nm-sun4sol2.h gdb/config/sparc/sp64.mt gdb/config/sparc/sp64linux.mt gdb/config/sparc/sp64sim.mt gdb/config/sparc/sp64sol2.mt gdb/config/sparc/sparc-em.mt gdb/config/sparc/sparclet.mt gdb/config/sparc/sparclite.mt gdb/config/sparc/sparclynx.mh gdb/config/sparc/sparclynx.mt gdb/config/sparc/sun4os4.mh gdb/config/sparc/sun4os4.mt gdb/config/sparc/sun4sol2.mh gdb/config/sparc/sun4sol2.mt gdb/config/sparc/tm-fbsd.h gdb/config/sparc/tm-linux.h gdb/config/sparc/tm-nbsd.h gdb/config/sparc/tm-sp64.h gdb/config/sparc/tm-sp64linux.h gdb/config/sparc/tm-sp64sim.h gdb/config/sparc/tm-sparc.h 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sim/testsuite/sim/fr30/stres.cgs sim/testsuite/sim/fr30/sub.cgs sim/testsuite/sim/fr30/subc.cgs sim/testsuite/sim/fr30/subn.cgs sim/testsuite/sim/fr30/testutils.inc sim/testsuite/sim/fr30/xchb.cgs sim/testsuite/sim/m32r/add.cgs sim/testsuite/sim/m32r/add3.cgs sim/testsuite/sim/m32r/addi.cgs sim/testsuite/sim/m32r/addv.cgs sim/testsuite/sim/m32r/addv3.cgs sim/testsuite/sim/m32r/addx.cgs sim/testsuite/sim/m32r/allinsn.exp sim/testsuite/sim/m32r/and.cgs sim/testsuite/sim/m32r/and3.cgs sim/testsuite/sim/m32r/bc24.cgs sim/testsuite/sim/m32r/bc8.cgs sim/testsuite/sim/m32r/beq.cgs sim/testsuite/sim/m32r/beqz.cgs sim/testsuite/sim/m32r/bgez.cgs sim/testsuite/sim/m32r/bgtz.cgs sim/testsuite/sim/m32r/bl24.cgs sim/testsuite/sim/m32r/bl8.cgs sim/testsuite/sim/m32r/blez.cgs sim/testsuite/sim/m32r/bltz.cgs sim/testsuite/sim/m32r/bnc24.cgs sim/testsuite/sim/m32r/bnc8.cgs sim/testsuite/sim/m32r/bne.cgs sim/testsuite/sim/m32r/bnez.cgs sim/testsuite/sim/m32r/bra24.cgs sim/testsuite/sim/m32r/bra8.cgs sim/testsuite/sim/m32r/cmp.cgs sim/testsuite/sim/m32r/cmpi.cgs sim/testsuite/sim/m32r/cmpu.cgs sim/testsuite/sim/m32r/cmpui.cgs sim/testsuite/sim/m32r/div.cgs sim/testsuite/sim/m32r/divu.cgs sim/testsuite/sim/m32r/hello.ms sim/testsuite/sim/m32r/hw-trap.ms sim/testsuite/sim/m32r/jl.cgs sim/testsuite/sim/m32r/jmp.cgs sim/testsuite/sim/m32r/ld-d.cgs sim/testsuite/sim/m32r/ld-plus.cgs sim/testsuite/sim/m32r/ld.cgs sim/testsuite/sim/m32r/ld24.cgs sim/testsuite/sim/m32r/ldb-d.cgs sim/testsuite/sim/m32r/ldb.cgs sim/testsuite/sim/m32r/ldh-d.cgs sim/testsuite/sim/m32r/ldh.cgs sim/testsuite/sim/m32r/ldi16.cgs sim/testsuite/sim/m32r/ldi8.cgs sim/testsuite/sim/m32r/ldub-d.cgs sim/testsuite/sim/m32r/ldub.cgs sim/testsuite/sim/m32r/lduh-d.cgs sim/testsuite/sim/m32r/lduh.cgs sim/testsuite/sim/m32r/lock.cgs sim/testsuite/sim/m32r/machi.cgs sim/testsuite/sim/m32r/maclo.cgs sim/testsuite/sim/m32r/macwhi.cgs sim/testsuite/sim/m32r/macwlo.cgs sim/testsuite/sim/m32r/misc.exp sim/testsuite/sim/m32r/mul.cgs sim/testsuite/sim/m32r/mulhi.cgs sim/testsuite/sim/m32r/mullo.cgs sim/testsuite/sim/m32r/mulwhi.cgs sim/testsuite/sim/m32r/mulwlo.cgs sim/testsuite/sim/m32r/mv.cgs sim/testsuite/sim/m32r/mvfachi.cgs sim/testsuite/sim/m32r/mvfaclo.cgs sim/testsuite/sim/m32r/mvfacmi.cgs sim/testsuite/sim/m32r/mvfc.cgs sim/testsuite/sim/m32r/mvtachi.cgs sim/testsuite/sim/m32r/mvtaclo.cgs sim/testsuite/sim/m32r/mvtc.cgs sim/testsuite/sim/m32r/neg.cgs sim/testsuite/sim/m32r/nop.cgs sim/testsuite/sim/m32r/not.cgs sim/testsuite/sim/m32r/or.cgs sim/testsuite/sim/m32r/or3.cgs sim/testsuite/sim/m32r/rac.cgs sim/testsuite/sim/m32r/rach.cgs sim/testsuite/sim/m32r/rem.cgs sim/testsuite/sim/m32r/remu.cgs sim/testsuite/sim/m32r/rte.cgs sim/testsuite/sim/m32r/seth.cgs sim/testsuite/sim/m32r/sll.cgs sim/testsuite/sim/m32r/sll3.cgs sim/testsuite/sim/m32r/slli.cgs sim/testsuite/sim/m32r/sra.cgs sim/testsuite/sim/m32r/sra3.cgs sim/testsuite/sim/m32r/srai.cgs sim/testsuite/sim/m32r/srl.cgs sim/testsuite/sim/m32r/srl3.cgs sim/testsuite/sim/m32r/srli.cgs sim/testsuite/sim/m32r/st-d.cgs sim/testsuite/sim/m32r/st-minus.cgs sim/testsuite/sim/m32r/st-plus.cgs sim/testsuite/sim/m32r/st.cgs sim/testsuite/sim/m32r/stb-d.cgs sim/testsuite/sim/m32r/stb.cgs sim/testsuite/sim/m32r/sth-d.cgs sim/testsuite/sim/m32r/sth.cgs sim/testsuite/sim/m32r/sub.cgs sim/testsuite/sim/m32r/subv.cgs sim/testsuite/sim/m32r/subx.cgs sim/testsuite/sim/m32r/testutils.inc sim/testsuite/sim/m32r/trap.cgs sim/testsuite/sim/m32r/unlock.cgs sim/testsuite/sim/m32r/uread16.ms sim/testsuite/sim/m32r/uread32.ms sim/testsuite/sim/m32r/uwrite16.ms sim/testsuite/sim/m32r/uwrite32.ms sim/testsuite/sim/m32r/xor.cgs sim/testsuite/sim/m32r/xor3.cgs sim/tic80/ChangeLog sim/tic80/Makefile.in sim/tic80/acconfig.h sim/tic80/alu.h sim/tic80/config.in sim/tic80/configure sim/tic80/configure.in sim/tic80/cpu.h sim/tic80/interp.c sim/tic80/misc.c sim/tic80/sim-calls.c sim/tic80/sim-main.h sim/tic80/tic80.dc sim/tic80/tic80.ic sim/tic80/tic80.igen sim/v850/ChangeLog sim/v850/Makefile.in sim/v850/acconfig.h sim/v850/config.in sim/v850/configure sim/v850/configure.in sim/v850/interp.c sim/v850/sim-main.h sim/v850/simops.c sim/v850/simops.h sim/v850/v850-dc sim/v850/v850.igen sim/v850/v850_sim.h sim/w65/ChangeLog sim/w65/Makefile.in sim/w65/acconfig.h sim/w65/config.in sim/w65/configure sim/w65/configure.in sim/w65/gencode.c sim/w65/interp.c sim/w65/interp.h sim/w65/run.c sim/z8k/ChangeLog sim/z8k/Makefile.in sim/z8k/acconfig.h sim/z8k/comped1.c sim/z8k/comped2.c sim/z8k/comped3.c sim/z8k/compedb3.c sim/z8k/config.in sim/z8k/configure sim/z8k/configure.in sim/z8k/iface.c sim/z8k/inlines.h sim/z8k/list.c sim/z8k/mem.c sim/z8k/mem.h sim/z8k/quick.c sim/z8k/sim.h sim/z8k/support.c sim/z8k/syscall.h sim/z8k/tconfig.in sim/z8k/tm.h sim/z8k/writecode.c symlink-tree texinfo/texinfo.tex ylwrap
Diffstat (limited to 'bfd/elflink.h')
-rw-r--r--bfd/elflink.h8419
1 files changed, 0 insertions, 8419 deletions
diff --git a/bfd/elflink.h b/bfd/elflink.h
deleted file mode 100644
index bfe6374..0000000
--- a/bfd/elflink.h
+++ /dev/null
@@ -1,8419 +0,0 @@
-/* ELF linker support.
- Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
- Free Software Foundation, Inc.
-
-This file is part of BFD, the Binary File Descriptor library.
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
-/* ELF linker code. */
-
-/* This struct is used to pass information to routines called via
- elf_link_hash_traverse which must return failure. */
-
-struct elf_info_failed
-{
- boolean failed;
- struct bfd_link_info *info;
- struct bfd_elf_version_tree *verdefs;
-};
-
-static boolean is_global_data_symbol_definition
- PARAMS ((bfd *, Elf_Internal_Sym *));
-static boolean elf_link_is_defined_archive_symbol
- PARAMS ((bfd *, carsym *));
-static boolean elf_link_add_object_symbols
- PARAMS ((bfd *, struct bfd_link_info *));
-static boolean elf_link_add_archive_symbols
- PARAMS ((bfd *, struct bfd_link_info *));
-static boolean elf_merge_symbol
- PARAMS ((bfd *, struct bfd_link_info *, const char *,
- Elf_Internal_Sym *, asection **, bfd_vma *,
- struct elf_link_hash_entry **, boolean *, boolean *,
- boolean *, boolean));
-static boolean elf_add_default_symbol
- PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
- const char *, Elf_Internal_Sym *, asection **, bfd_vma *,
- boolean *, boolean, boolean));
-static boolean elf_export_symbol
- PARAMS ((struct elf_link_hash_entry *, PTR));
-static boolean elf_finalize_dynstr
- PARAMS ((bfd *, struct bfd_link_info *));
-static boolean elf_fix_symbol_flags
- PARAMS ((struct elf_link_hash_entry *, struct elf_info_failed *));
-static boolean elf_adjust_dynamic_symbol
- PARAMS ((struct elf_link_hash_entry *, PTR));
-static boolean elf_link_find_version_dependencies
- PARAMS ((struct elf_link_hash_entry *, PTR));
-static boolean elf_link_assign_sym_version
- PARAMS ((struct elf_link_hash_entry *, PTR));
-static boolean elf_collect_hash_codes
- PARAMS ((struct elf_link_hash_entry *, PTR));
-static boolean elf_link_read_relocs_from_section
- PARAMS ((bfd *, Elf_Internal_Shdr *, PTR, Elf_Internal_Rela *));
-static size_t compute_bucket_count
- PARAMS ((struct bfd_link_info *));
-static void elf_link_output_relocs
- PARAMS ((bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *));
-static boolean elf_link_size_reloc_section
- PARAMS ((bfd *, Elf_Internal_Shdr *, asection *));
-static void elf_link_adjust_relocs
- PARAMS ((bfd *, Elf_Internal_Shdr *, unsigned int,
- struct elf_link_hash_entry **));
-static int elf_link_sort_cmp1
- PARAMS ((const void *, const void *));
-static int elf_link_sort_cmp2
- PARAMS ((const void *, const void *));
-static size_t elf_link_sort_relocs
- PARAMS ((bfd *, struct bfd_link_info *, asection **));
-static boolean elf_section_ignore_discarded_relocs
- PARAMS ((asection *));
-
-/* Given an ELF BFD, add symbols to the global hash table as
- appropriate. */
-
-boolean
-elf_bfd_link_add_symbols (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
-{
- switch (bfd_get_format (abfd))
- {
- case bfd_object:
- return elf_link_add_object_symbols (abfd, info);
- case bfd_archive:
- return elf_link_add_archive_symbols (abfd, info);
- default:
- bfd_set_error (bfd_error_wrong_format);
- return false;
- }
-}
-
-/* Return true iff this is a non-common, definition of a non-function symbol. */
-static boolean
-is_global_data_symbol_definition (abfd, sym)
- bfd * abfd ATTRIBUTE_UNUSED;
- Elf_Internal_Sym * sym;
-{
- /* Local symbols do not count, but target specific ones might. */
- if (ELF_ST_BIND (sym->st_info) != STB_GLOBAL
- && ELF_ST_BIND (sym->st_info) < STB_LOOS)
- return false;
-
- /* Function symbols do not count. */
- if (ELF_ST_TYPE (sym->st_info) == STT_FUNC)
- return false;
-
- /* If the section is undefined, then so is the symbol. */
- if (sym->st_shndx == SHN_UNDEF)
- return false;
-
- /* If the symbol is defined in the common section, then
- it is a common definition and so does not count. */
- if (sym->st_shndx == SHN_COMMON)
- return false;
-
- /* If the symbol is in a target specific section then we
- must rely upon the backend to tell us what it is. */
- if (sym->st_shndx >= SHN_LORESERVE && sym->st_shndx < SHN_ABS)
- /* FIXME - this function is not coded yet:
-
- return _bfd_is_global_symbol_definition (abfd, sym);
-
- Instead for now assume that the definition is not global,
- Even if this is wrong, at least the linker will behave
- in the same way that it used to do. */
- return false;
-
- return true;
-}
-
-/* Search the symbol table of the archive element of the archive ABFD
- whose archive map contains a mention of SYMDEF, and determine if
- the symbol is defined in this element. */
-static boolean
-elf_link_is_defined_archive_symbol (abfd, symdef)
- bfd * abfd;
- carsym * symdef;
-{
- Elf_Internal_Shdr * hdr;
- Elf_Internal_Shdr * shndx_hdr;
- Elf_External_Sym * esym;
- Elf_External_Sym * esymend;
- Elf_External_Sym * buf = NULL;
- Elf_External_Sym_Shndx * shndx_buf = NULL;
- Elf_External_Sym_Shndx * shndx;
- bfd_size_type symcount;
- bfd_size_type extsymcount;
- bfd_size_type extsymoff;
- boolean result = false;
- file_ptr pos;
- bfd_size_type amt;
-
- abfd = _bfd_get_elt_at_filepos (abfd, symdef->file_offset);
- if (abfd == (bfd *) NULL)
- return false;
-
- if (! bfd_check_format (abfd, bfd_object))
- return false;
-
- /* If we have already included the element containing this symbol in the
- link then we do not need to include it again. Just claim that any symbol
- it contains is not a definition, so that our caller will not decide to
- (re)include this element. */
- if (abfd->archive_pass)
- return false;
-
- /* Select the appropriate symbol table. */
- if ((abfd->flags & DYNAMIC) == 0 || elf_dynsymtab (abfd) == 0)
- {
- hdr = &elf_tdata (abfd)->symtab_hdr;
- shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
- }
- else
- {
- hdr = &elf_tdata (abfd)->dynsymtab_hdr;
- shndx_hdr = NULL;
- }
-
- symcount = hdr->sh_size / sizeof (Elf_External_Sym);
-
- /* The sh_info field of the symtab header tells us where the
- external symbols start. We don't care about the local symbols. */
- if (elf_bad_symtab (abfd))
- {
- extsymcount = symcount;
- extsymoff = 0;
- }
- else
- {
- extsymcount = symcount - hdr->sh_info;
- extsymoff = hdr->sh_info;
- }
-
- amt = extsymcount * sizeof (Elf_External_Sym);
- buf = (Elf_External_Sym *) bfd_malloc (amt);
- if (buf == NULL && extsymcount != 0)
- return false;
-
- /* Read in the symbol table.
- FIXME: This ought to be cached somewhere. */
- pos = hdr->sh_offset + extsymoff * sizeof (Elf_External_Sym);
- if (bfd_seek (abfd, pos, SEEK_SET) != 0
- || bfd_bread ((PTR) buf, amt, abfd) != amt)
- goto error_exit;
-
- if (shndx_hdr != NULL && shndx_hdr->sh_size != 0)
- {
- amt = extsymcount * sizeof (Elf_External_Sym_Shndx);
- shndx_buf = (Elf_External_Sym_Shndx *) bfd_malloc (amt);
- if (shndx_buf == NULL && extsymcount != 0)
- goto error_exit;
-
- pos = shndx_hdr->sh_offset + extsymoff * sizeof (Elf_External_Sym_Shndx);
- if (bfd_seek (abfd, pos, SEEK_SET) != 0
- || bfd_bread ((PTR) shndx_buf, amt, abfd) != amt)
- goto error_exit;
- }
-
- /* Scan the symbol table looking for SYMDEF. */
- esymend = buf + extsymcount;
- for (esym = buf, shndx = shndx_buf;
- esym < esymend;
- esym++, shndx = (shndx != NULL ? shndx + 1 : NULL))
- {
- Elf_Internal_Sym sym;
- const char * name;
-
- elf_swap_symbol_in (abfd, esym, shndx, &sym);
-
- name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, sym.st_name);
- if (name == (const char *) NULL)
- break;
-
- if (strcmp (name, symdef->name) == 0)
- {
- result = is_global_data_symbol_definition (abfd, & sym);
- break;
- }
- }
-
- error_exit:
- if (shndx_buf != NULL)
- free (shndx_buf);
- if (buf != NULL)
- free (buf);
-
- return result;
-}
-
-/* Add symbols from an ELF archive file to the linker hash table. We
- don't use _bfd_generic_link_add_archive_symbols because of a
- problem which arises on UnixWare. The UnixWare libc.so is an
- archive which includes an entry libc.so.1 which defines a bunch of
- symbols. The libc.so archive also includes a number of other
- object files, which also define symbols, some of which are the same
- as those defined in libc.so.1. Correct linking requires that we
- consider each object file in turn, and include it if it defines any
- symbols we need. _bfd_generic_link_add_archive_symbols does not do
- this; it looks through the list of undefined symbols, and includes
- any object file which defines them. When this algorithm is used on
- UnixWare, it winds up pulling in libc.so.1 early and defining a
- bunch of symbols. This means that some of the other objects in the
- archive are not included in the link, which is incorrect since they
- precede libc.so.1 in the archive.
-
- Fortunately, ELF archive handling is simpler than that done by
- _bfd_generic_link_add_archive_symbols, which has to allow for a.out
- oddities. In ELF, if we find a symbol in the archive map, and the
- symbol is currently undefined, we know that we must pull in that
- object file.
-
- Unfortunately, we do have to make multiple passes over the symbol
- table until nothing further is resolved. */
-
-static boolean
-elf_link_add_archive_symbols (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
-{
- symindex c;
- boolean *defined = NULL;
- boolean *included = NULL;
- carsym *symdefs;
- boolean loop;
- bfd_size_type amt;
-
- if (! bfd_has_map (abfd))
- {
- /* An empty archive is a special case. */
- if (bfd_openr_next_archived_file (abfd, (bfd *) NULL) == NULL)
- return true;
- bfd_set_error (bfd_error_no_armap);
- return false;
- }
-
- /* Keep track of all symbols we know to be already defined, and all
- files we know to be already included. This is to speed up the
- second and subsequent passes. */
- c = bfd_ardata (abfd)->symdef_count;
- if (c == 0)
- return true;
- amt = c;
- amt *= sizeof (boolean);
- defined = (boolean *) bfd_malloc (amt);
- included = (boolean *) bfd_malloc (amt);
- if (defined == (boolean *) NULL || included == (boolean *) NULL)
- goto error_return;
- memset (defined, 0, (size_t) amt);
- memset (included, 0, (size_t) amt);
-
- symdefs = bfd_ardata (abfd)->symdefs;
-
- do
- {
- file_ptr last;
- symindex i;
- carsym *symdef;
- carsym *symdefend;
-
- loop = false;
- last = -1;
-
- symdef = symdefs;
- symdefend = symdef + c;
- for (i = 0; symdef < symdefend; symdef++, i++)
- {
- struct elf_link_hash_entry *h;
- bfd *element;
- struct bfd_link_hash_entry *undefs_tail;
- symindex mark;
-
- if (defined[i] || included[i])
- continue;
- if (symdef->file_offset == last)
- {
- included[i] = true;
- continue;
- }
-
- h = elf_link_hash_lookup (elf_hash_table (info), symdef->name,
- false, false, false);
-
- if (h == NULL)
- {
- char *p, *copy;
-
- /* If this is a default version (the name contains @@),
- look up the symbol again without the version. The
- effect is that references to the symbol without the
- version will be matched by the default symbol in the
- archive. */
-
- p = strchr (symdef->name, ELF_VER_CHR);
- if (p == NULL || p[1] != ELF_VER_CHR)
- continue;
-
- copy = bfd_alloc (abfd, (bfd_size_type) (p - symdef->name + 1));
- if (copy == NULL)
- goto error_return;
- memcpy (copy, symdef->name, (size_t) (p - symdef->name));
- copy[p - symdef->name] = '\0';
-
- h = elf_link_hash_lookup (elf_hash_table (info), copy,
- false, false, false);
-
- bfd_release (abfd, copy);
- }
-
- if (h == NULL)
- continue;
-
- if (h->root.type == bfd_link_hash_common)
- {
- /* We currently have a common symbol. The archive map contains
- a reference to this symbol, so we may want to include it. We
- only want to include it however, if this archive element
- contains a definition of the symbol, not just another common
- declaration of it.
-
- Unfortunately some archivers (including GNU ar) will put
- declarations of common symbols into their archive maps, as
- well as real definitions, so we cannot just go by the archive
- map alone. Instead we must read in the element's symbol
- table and check that to see what kind of symbol definition
- this is. */
- if (! elf_link_is_defined_archive_symbol (abfd, symdef))
- continue;
- }
- else if (h->root.type != bfd_link_hash_undefined)
- {
- if (h->root.type != bfd_link_hash_undefweak)
- defined[i] = true;
- continue;
- }
-
- /* We need to include this archive member. */
- element = _bfd_get_elt_at_filepos (abfd, symdef->file_offset);
- if (element == (bfd *) NULL)
- goto error_return;
-
- if (! bfd_check_format (element, bfd_object))
- goto error_return;
-
- /* Doublecheck that we have not included this object
- already--it should be impossible, but there may be
- something wrong with the archive. */
- if (element->archive_pass != 0)
- {
- bfd_set_error (bfd_error_bad_value);
- goto error_return;
- }
- element->archive_pass = 1;
-
- undefs_tail = info->hash->undefs_tail;
-
- if (! (*info->callbacks->add_archive_element) (info, element,
- symdef->name))
- goto error_return;
- if (! elf_link_add_object_symbols (element, info))
- goto error_return;
-
- /* If there are any new undefined symbols, we need to make
- another pass through the archive in order to see whether
- they can be defined. FIXME: This isn't perfect, because
- common symbols wind up on undefs_tail and because an
- undefined symbol which is defined later on in this pass
- does not require another pass. This isn't a bug, but it
- does make the code less efficient than it could be. */
- if (undefs_tail != info->hash->undefs_tail)
- loop = true;
-
- /* Look backward to mark all symbols from this object file
- which we have already seen in this pass. */
- mark = i;
- do
- {
- included[mark] = true;
- if (mark == 0)
- break;
- --mark;
- }
- while (symdefs[mark].file_offset == symdef->file_offset);
-
- /* We mark subsequent symbols from this object file as we go
- on through the loop. */
- last = symdef->file_offset;
- }
- }
- while (loop);
-
- free (defined);
- free (included);
-
- return true;
-
- error_return:
- if (defined != (boolean *) NULL)
- free (defined);
- if (included != (boolean *) NULL)
- free (included);
- return false;
-}
-
-/* This function is called when we want to define a new symbol. It
- handles the various cases which arise when we find a definition in
- a dynamic object, or when there is already a definition in a
- dynamic object. The new symbol is described by NAME, SYM, PSEC,
- and PVALUE. We set SYM_HASH to the hash table entry. We set
- OVERRIDE if the old symbol is overriding a new definition. We set
- TYPE_CHANGE_OK if it is OK for the type to change. We set
- SIZE_CHANGE_OK if it is OK for the size to change. By OK to
- change, we mean that we shouldn't warn if the type or size does
- change. DT_NEEDED indicates if it comes from a DT_NEEDED entry of
- a shared object. */
-
-static boolean
-elf_merge_symbol (abfd, info, name, sym, psec, pvalue, sym_hash,
- override, type_change_ok, size_change_ok, dt_needed)
- bfd *abfd;
- struct bfd_link_info *info;
- const char *name;
- Elf_Internal_Sym *sym;
- asection **psec;
- bfd_vma *pvalue;
- struct elf_link_hash_entry **sym_hash;
- boolean *override;
- boolean *type_change_ok;
- boolean *size_change_ok;
- boolean dt_needed;
-{
- asection *sec;
- struct elf_link_hash_entry *h;
- int bind;
- bfd *oldbfd;
- boolean newdyn, olddyn, olddef, newdef, newdyncommon, olddyncommon;
-
- *override = false;
-
- sec = *psec;
- bind = ELF_ST_BIND (sym->st_info);
-
- if (! bfd_is_und_section (sec))
- h = elf_link_hash_lookup (elf_hash_table (info), name, true, false, false);
- else
- h = ((struct elf_link_hash_entry *)
- bfd_wrapped_link_hash_lookup (abfd, info, name, true, false, false));
- if (h == NULL)
- return false;
- *sym_hash = h;
-
- /* This code is for coping with dynamic objects, and is only useful
- if we are doing an ELF link. */
- if (info->hash->creator != abfd->xvec)
- return true;
-
- /* For merging, we only care about real symbols. */
-
- while (h->root.type == bfd_link_hash_indirect
- || h->root.type == bfd_link_hash_warning)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
-
- /* If we just created the symbol, mark it as being an ELF symbol.
- Other than that, there is nothing to do--there is no merge issue
- with a newly defined symbol--so we just return. */
-
- if (h->root.type == bfd_link_hash_new)
- {
- h->elf_link_hash_flags &=~ ELF_LINK_NON_ELF;
- return true;
- }
-
- /* OLDBFD is a BFD associated with the existing symbol. */
-
- switch (h->root.type)
- {
- default:
- oldbfd = NULL;
- break;
-
- case bfd_link_hash_undefined:
- case bfd_link_hash_undefweak:
- oldbfd = h->root.u.undef.abfd;
- break;
-
- case bfd_link_hash_defined:
- case bfd_link_hash_defweak:
- oldbfd = h->root.u.def.section->owner;
- break;
-
- case bfd_link_hash_common:
- oldbfd = h->root.u.c.p->section->owner;
- break;
- }
-
- /* In cases involving weak versioned symbols, we may wind up trying
- to merge a symbol with itself. Catch that here, to avoid the
- confusion that results if we try to override a symbol with
- itself. The additional tests catch cases like
- _GLOBAL_OFFSET_TABLE_, which are regular symbols defined in a
- dynamic object, which we do want to handle here. */
- if (abfd == oldbfd
- && ((abfd->flags & DYNAMIC) == 0
- || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0))
- return true;
-
- /* NEWDYN and OLDDYN indicate whether the new or old symbol,
- respectively, is from a dynamic object. */
-
- if ((abfd->flags & DYNAMIC) != 0)
- newdyn = true;
- else
- newdyn = false;
-
- if (oldbfd != NULL)
- olddyn = (oldbfd->flags & DYNAMIC) != 0;
- else
- {
- asection *hsec;
-
- /* This code handles the special SHN_MIPS_{TEXT,DATA} section
- indices used by MIPS ELF. */
- switch (h->root.type)
- {
- default:
- hsec = NULL;
- break;
-
- case bfd_link_hash_defined:
- case bfd_link_hash_defweak:
- hsec = h->root.u.def.section;
- break;
-
- case bfd_link_hash_common:
- hsec = h->root.u.c.p->section;
- break;
- }
-
- if (hsec == NULL)
- olddyn = false;
- else
- olddyn = (hsec->symbol->flags & BSF_DYNAMIC) != 0;
- }
-
- /* NEWDEF and OLDDEF indicate whether the new or old symbol,
- respectively, appear to be a definition rather than reference. */
-
- if (bfd_is_und_section (sec) || bfd_is_com_section (sec))
- newdef = false;
- else
- newdef = true;
-
- if (h->root.type == bfd_link_hash_undefined
- || h->root.type == bfd_link_hash_undefweak
- || h->root.type == bfd_link_hash_common)
- olddef = false;
- else
- olddef = true;
-
- /* NEWDYNCOMMON and OLDDYNCOMMON indicate whether the new or old
- symbol, respectively, appears to be a common symbol in a dynamic
- object. If a symbol appears in an uninitialized section, and is
- not weak, and is not a function, then it may be a common symbol
- which was resolved when the dynamic object was created. We want
- to treat such symbols specially, because they raise special
- considerations when setting the symbol size: if the symbol
- appears as a common symbol in a regular object, and the size in
- the regular object is larger, we must make sure that we use the
- larger size. This problematic case can always be avoided in C,
- but it must be handled correctly when using Fortran shared
- libraries.
-
- Note that if NEWDYNCOMMON is set, NEWDEF will be set, and
- likewise for OLDDYNCOMMON and OLDDEF.
-
- Note that this test is just a heuristic, and that it is quite
- possible to have an uninitialized symbol in a shared object which
- is really a definition, rather than a common symbol. This could
- lead to some minor confusion when the symbol really is a common
- symbol in some regular object. However, I think it will be
- harmless. */
-
- if (newdyn
- && newdef
- && (sec->flags & SEC_ALLOC) != 0
- && (sec->flags & SEC_LOAD) == 0
- && sym->st_size > 0
- && bind != STB_WEAK
- && ELF_ST_TYPE (sym->st_info) != STT_FUNC)
- newdyncommon = true;
- else
- newdyncommon = false;
-
- if (olddyn
- && olddef
- && h->root.type == bfd_link_hash_defined
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
- && (h->root.u.def.section->flags & SEC_ALLOC) != 0
- && (h->root.u.def.section->flags & SEC_LOAD) == 0
- && h->size > 0
- && h->type != STT_FUNC)
- olddyncommon = true;
- else
- olddyncommon = false;
-
- /* It's OK to change the type if either the existing symbol or the
- new symbol is weak unless it comes from a DT_NEEDED entry of
- a shared object, in which case, the DT_NEEDED entry may not be
- required at the run time. */
-
- if ((! dt_needed && h->root.type == bfd_link_hash_defweak)
- || h->root.type == bfd_link_hash_undefweak
- || bind == STB_WEAK)
- *type_change_ok = true;
-
- /* It's OK to change the size if either the existing symbol or the
- new symbol is weak, or if the old symbol is undefined. */
-
- if (*type_change_ok
- || h->root.type == bfd_link_hash_undefined)
- *size_change_ok = true;
-
- /* If both the old and the new symbols look like common symbols in a
- dynamic object, set the size of the symbol to the larger of the
- two. */
-
- if (olddyncommon
- && newdyncommon
- && sym->st_size != h->size)
- {
- /* Since we think we have two common symbols, issue a multiple
- common warning if desired. Note that we only warn if the
- size is different. If the size is the same, we simply let
- the old symbol override the new one as normally happens with
- symbols defined in dynamic objects. */
-
- if (! ((*info->callbacks->multiple_common)
- (info, h->root.root.string, oldbfd, bfd_link_hash_common,
- h->size, abfd, bfd_link_hash_common, sym->st_size)))
- return false;
-
- if (sym->st_size > h->size)
- h->size = sym->st_size;
-
- *size_change_ok = true;
- }
-
- /* If we are looking at a dynamic object, and we have found a
- definition, we need to see if the symbol was already defined by
- some other object. If so, we want to use the existing
- definition, and we do not want to report a multiple symbol
- definition error; we do this by clobbering *PSEC to be
- bfd_und_section_ptr.
-
- We treat a common symbol as a definition if the symbol in the
- shared library is a function, since common symbols always
- represent variables; this can cause confusion in principle, but
- any such confusion would seem to indicate an erroneous program or
- shared library. We also permit a common symbol in a regular
- object to override a weak symbol in a shared object.
-
- We prefer a non-weak definition in a shared library to a weak
- definition in the executable unless it comes from a DT_NEEDED
- entry of a shared object, in which case, the DT_NEEDED entry
- may not be required at the run time. */
-
- if (newdyn
- && newdef
- && (olddef
- || (h->root.type == bfd_link_hash_common
- && (bind == STB_WEAK
- || ELF_ST_TYPE (sym->st_info) == STT_FUNC)))
- && (h->root.type != bfd_link_hash_defweak
- || dt_needed
- || bind == STB_WEAK))
- {
- *override = true;
- newdef = false;
- newdyncommon = false;
-
- *psec = sec = bfd_und_section_ptr;
- *size_change_ok = true;
-
- /* If we get here when the old symbol is a common symbol, then
- we are explicitly letting it override a weak symbol or
- function in a dynamic object, and we don't want to warn about
- a type change. If the old symbol is a defined symbol, a type
- change warning may still be appropriate. */
-
- if (h->root.type == bfd_link_hash_common)
- *type_change_ok = true;
- }
-
- /* Handle the special case of an old common symbol merging with a
- new symbol which looks like a common symbol in a shared object.
- We change *PSEC and *PVALUE to make the new symbol look like a
- common symbol, and let _bfd_generic_link_add_one_symbol will do
- the right thing. */
-
- if (newdyncommon
- && h->root.type == bfd_link_hash_common)
- {
- *override = true;
- newdef = false;
- newdyncommon = false;
- *pvalue = sym->st_size;
- *psec = sec = bfd_com_section_ptr;
- *size_change_ok = true;
- }
-
- /* If the old symbol is from a dynamic object, and the new symbol is
- a definition which is not from a dynamic object, then the new
- symbol overrides the old symbol. Symbols from regular files
- always take precedence over symbols from dynamic objects, even if
- they are defined after the dynamic object in the link.
-
- As above, we again permit a common symbol in a regular object to
- override a definition in a shared object if the shared object
- symbol is a function or is weak.
-
- As above, we permit a non-weak definition in a shared object to
- override a weak definition in a regular object. */
-
- if (! newdyn
- && (newdef
- || (bfd_is_com_section (sec)
- && (h->root.type == bfd_link_hash_defweak
- || h->type == STT_FUNC)))
- && olddyn
- && olddef
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
- && (bind != STB_WEAK
- || h->root.type == bfd_link_hash_defweak))
- {
- /* Change the hash table entry to undefined, and let
- _bfd_generic_link_add_one_symbol do the right thing with the
- new definition. */
-
- h->root.type = bfd_link_hash_undefined;
- h->root.u.undef.abfd = h->root.u.def.section->owner;
- *size_change_ok = true;
-
- olddef = false;
- olddyncommon = false;
-
- /* We again permit a type change when a common symbol may be
- overriding a function. */
-
- if (bfd_is_com_section (sec))
- *type_change_ok = true;
-
- /* This union may have been set to be non-NULL when this symbol
- was seen in a dynamic object. We must force the union to be
- NULL, so that it is correct for a regular symbol. */
-
- h->verinfo.vertree = NULL;
-
- /* In this special case, if H is the target of an indirection,
- we want the caller to frob with H rather than with the
- indirect symbol. That will permit the caller to redefine the
- target of the indirection, rather than the indirect symbol
- itself. FIXME: This will break the -y option if we store a
- symbol with a different name. */
- *sym_hash = h;
- }
-
- /* Handle the special case of a new common symbol merging with an
- old symbol that looks like it might be a common symbol defined in
- a shared object. Note that we have already handled the case in
- which a new common symbol should simply override the definition
- in the shared library. */
-
- if (! newdyn
- && bfd_is_com_section (sec)
- && olddyncommon)
- {
- /* It would be best if we could set the hash table entry to a
- common symbol, but we don't know what to use for the section
- or the alignment. */
- if (! ((*info->callbacks->multiple_common)
- (info, h->root.root.string, oldbfd, bfd_link_hash_common,
- h->size, abfd, bfd_link_hash_common, sym->st_size)))
- return false;
-
- /* If the predumed common symbol in the dynamic object is
- larger, pretend that the new symbol has its size. */
-
- if (h->size > *pvalue)
- *pvalue = h->size;
-
- /* FIXME: We no longer know the alignment required by the symbol
- in the dynamic object, so we just wind up using the one from
- the regular object. */
-
- olddef = false;
- olddyncommon = false;
-
- h->root.type = bfd_link_hash_undefined;
- h->root.u.undef.abfd = h->root.u.def.section->owner;
-
- *size_change_ok = true;
- *type_change_ok = true;
-
- h->verinfo.vertree = NULL;
- }
-
- /* Handle the special case of a weak definition in a regular object
- followed by a non-weak definition in a shared object. In this
- case, we prefer the definition in the shared object unless it
- comes from a DT_NEEDED entry of a shared object, in which case,
- the DT_NEEDED entry may not be required at the run time. */
- if (olddef
- && ! dt_needed
- && h->root.type == bfd_link_hash_defweak
- && newdef
- && newdyn
- && bind != STB_WEAK)
- {
- /* To make this work we have to frob the flags so that the rest
- of the code does not think we are using the regular
- definition. */
- if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0)
- h->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR;
- else if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0)
- h->elf_link_hash_flags |= ELF_LINK_HASH_REF_DYNAMIC;
- h->elf_link_hash_flags &= ~ (ELF_LINK_HASH_DEF_REGULAR
- | ELF_LINK_HASH_DEF_DYNAMIC);
-
- /* If H is the target of an indirection, we want the caller to
- use H rather than the indirect symbol. Otherwise if we are
- defining a new indirect symbol we will wind up attaching it
- to the entry we are overriding. */
- *sym_hash = h;
- }
-
- /* Handle the special case of a non-weak definition in a shared
- object followed by a weak definition in a regular object. In
- this case we prefer to definition in the shared object. To make
- this work we have to tell the caller to not treat the new symbol
- as a definition. */
- if (olddef
- && olddyn
- && h->root.type != bfd_link_hash_defweak
- && newdef
- && ! newdyn
- && bind == STB_WEAK)
- *override = true;
-
- return true;
-}
-
-/* This function is called to create an indirect symbol from the
- default for the symbol with the default version if needed. The
- symbol is described by H, NAME, SYM, SEC, VALUE, and OVERRIDE. We
- set DYNSYM if the new indirect symbol is dynamic. DT_NEEDED
- indicates if it comes from a DT_NEEDED entry of a shared object. */
-
-static boolean
-elf_add_default_symbol (abfd, info, h, name, sym, sec, value,
- dynsym, override, dt_needed)
- bfd *abfd;
- struct bfd_link_info *info;
- struct elf_link_hash_entry *h;
- const char *name;
- Elf_Internal_Sym *sym;
- asection **sec;
- bfd_vma *value;
- boolean *dynsym;
- boolean override;
- boolean dt_needed;
-{
- boolean type_change_ok;
- boolean size_change_ok;
- char *shortname;
- struct elf_link_hash_entry *hi;
- struct elf_backend_data *bed;
- boolean collect;
- boolean dynamic;
- char *p;
-
- /* If this symbol has a version, and it is the default version, we
- create an indirect symbol from the default name to the fully
- decorated name. This will cause external references which do not
- specify a version to be bound to this version of the symbol. */
- p = strchr (name, ELF_VER_CHR);
- if (p == NULL || p[1] != ELF_VER_CHR)
- return true;
-
- if (override)
- {
- /* We are overridden by an old defition. We need to check if we
- need to crreate the indirect symbol from the default name. */
- hi = elf_link_hash_lookup (elf_hash_table (info), name, true,
- false, false);
- BFD_ASSERT (hi != NULL);
- if (hi == h)
- return true;
- while (hi->root.type == bfd_link_hash_indirect
- || hi->root.type == bfd_link_hash_warning)
- {
- hi = (struct elf_link_hash_entry *) hi->root.u.i.link;
- if (hi == h)
- return true;
- }
- }
-
- bed = get_elf_backend_data (abfd);
- collect = bed->collect;
- dynamic = (abfd->flags & DYNAMIC) != 0;
-
- shortname = bfd_hash_allocate (&info->hash->table,
- (size_t) (p - name + 1));
- if (shortname == NULL)
- return false;
- strncpy (shortname, name, (size_t) (p - name));
- shortname [p - name] = '\0';
-
- /* We are going to create a new symbol. Merge it with any existing
- symbol with this name. For the purposes of the merge, act as
- though we were defining the symbol we just defined, although we
- actually going to define an indirect symbol. */
- type_change_ok = false;
- size_change_ok = false;
- if (! elf_merge_symbol (abfd, info, shortname, sym, sec, value,
- &hi, &override, &type_change_ok,
- &size_change_ok, dt_needed))
- return false;
-
- if (! override)
- {
- if (! (_bfd_generic_link_add_one_symbol
- (info, abfd, shortname, BSF_INDIRECT, bfd_ind_section_ptr,
- (bfd_vma) 0, name, false, collect,
- (struct bfd_link_hash_entry **) &hi)))
- return false;
- }
- else
- {
- /* In this case the symbol named SHORTNAME is overriding the
- indirect symbol we want to add. We were planning on making
- SHORTNAME an indirect symbol referring to NAME. SHORTNAME
- is the name without a version. NAME is the fully versioned
- name, and it is the default version.
-
- Overriding means that we already saw a definition for the
- symbol SHORTNAME in a regular object, and it is overriding
- the symbol defined in the dynamic object.
-
- When this happens, we actually want to change NAME, the
- symbol we just added, to refer to SHORTNAME. This will cause
- references to NAME in the shared object to become references
- to SHORTNAME in the regular object. This is what we expect
- when we override a function in a shared object: that the
- references in the shared object will be mapped to the
- definition in the regular object. */
-
- while (hi->root.type == bfd_link_hash_indirect
- || hi->root.type == bfd_link_hash_warning)
- hi = (struct elf_link_hash_entry *) hi->root.u.i.link;
-
- h->root.type = bfd_link_hash_indirect;
- h->root.u.i.link = (struct bfd_link_hash_entry *) hi;
- if (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)
- {
- h->elf_link_hash_flags &=~ ELF_LINK_HASH_DEF_DYNAMIC;
- hi->elf_link_hash_flags |= ELF_LINK_HASH_REF_DYNAMIC;
- if (hi->elf_link_hash_flags
- & (ELF_LINK_HASH_REF_REGULAR
- | ELF_LINK_HASH_DEF_REGULAR))
- {
- if (! _bfd_elf_link_record_dynamic_symbol (info, hi))
- return false;
- }
- }
-
- /* Now set HI to H, so that the following code will set the
- other fields correctly. */
- hi = h;
- }
-
- /* If there is a duplicate definition somewhere, then HI may not
- point to an indirect symbol. We will have reported an error to
- the user in that case. */
-
- if (hi->root.type == bfd_link_hash_indirect)
- {
- struct elf_link_hash_entry *ht;
-
- /* If the symbol became indirect, then we assume that we have
- not seen a definition before. */
- BFD_ASSERT ((hi->elf_link_hash_flags
- & (ELF_LINK_HASH_DEF_DYNAMIC
- | ELF_LINK_HASH_DEF_REGULAR)) == 0);
-
- ht = (struct elf_link_hash_entry *) hi->root.u.i.link;
- (*bed->elf_backend_copy_indirect_symbol) (ht, hi);
-
- /* See if the new flags lead us to realize that the symbol must
- be dynamic. */
- if (! *dynsym)
- {
- if (! dynamic)
- {
- if (info->shared
- || ((hi->elf_link_hash_flags
- & ELF_LINK_HASH_REF_DYNAMIC) != 0))
- *dynsym = true;
- }
- else
- {
- if ((hi->elf_link_hash_flags
- & ELF_LINK_HASH_REF_REGULAR) != 0)
- *dynsym = true;
- }
- }
- }
-
- /* We also need to define an indirection from the nondefault version
- of the symbol. */
-
- shortname = bfd_hash_allocate (&info->hash->table, strlen (name));
- if (shortname == NULL)
- return false;
- strncpy (shortname, name, (size_t) (p - name));
- strcpy (shortname + (p - name), p + 1);
-
- /* Once again, merge with any existing symbol. */
- type_change_ok = false;
- size_change_ok = false;
- if (! elf_merge_symbol (abfd, info, shortname, sym, sec, value,
- &hi, &override, &type_change_ok,
- &size_change_ok, dt_needed))
- return false;
-
- if (override)
- {
- /* Here SHORTNAME is a versioned name, so we don't expect to see
- the type of override we do in the case above. */
- (*_bfd_error_handler)
- (_("%s: warning: unexpected redefinition of `%s'"),
- bfd_archive_filename (abfd), shortname);
- }
- else
- {
- if (! (_bfd_generic_link_add_one_symbol
- (info, abfd, shortname, BSF_INDIRECT,
- bfd_ind_section_ptr, (bfd_vma) 0, name, false,
- collect, (struct bfd_link_hash_entry **) &hi)))
- return false;
-
- /* If there is a duplicate definition somewhere, then HI may not
- point to an indirect symbol. We will have reported an error
- to the user in that case. */
-
- if (hi->root.type == bfd_link_hash_indirect)
- {
- /* If the symbol became indirect, then we assume that we have
- not seen a definition before. */
- BFD_ASSERT ((hi->elf_link_hash_flags
- & (ELF_LINK_HASH_DEF_DYNAMIC
- | ELF_LINK_HASH_DEF_REGULAR)) == 0);
-
- (*bed->elf_backend_copy_indirect_symbol) (h, hi);
-
- /* See if the new flags lead us to realize that the symbol
- must be dynamic. */
- if (! *dynsym)
- {
- if (! dynamic)
- {
- if (info->shared
- || ((hi->elf_link_hash_flags
- & ELF_LINK_HASH_REF_DYNAMIC) != 0))
- *dynsym = true;
- }
- else
- {
- if ((hi->elf_link_hash_flags
- & ELF_LINK_HASH_REF_REGULAR) != 0)
- *dynsym = true;
- }
- }
- }
- }
-
- return true;
-}
-
-/* Add symbols from an ELF object file to the linker hash table. */
-
-static boolean
-elf_link_add_object_symbols (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
-{
- boolean (*add_symbol_hook) PARAMS ((bfd *, struct bfd_link_info *,
- const Elf_Internal_Sym *,
- const char **, flagword *,
- asection **, bfd_vma *));
- boolean (*check_relocs) PARAMS ((bfd *, struct bfd_link_info *,
- asection *, const Elf_Internal_Rela *));
- boolean collect;
- Elf_Internal_Shdr *hdr;
- Elf_Internal_Shdr *shndx_hdr;
- bfd_size_type symcount;
- bfd_size_type extsymcount;
- bfd_size_type extsymoff;
- Elf_External_Sym *buf = NULL;
- Elf_External_Sym_Shndx *shndx_buf = NULL;
- Elf_External_Sym_Shndx *shndx;
- struct elf_link_hash_entry **sym_hash;
- boolean dynamic;
- Elf_External_Versym *extversym = NULL;
- Elf_External_Versym *ever;
- Elf_External_Dyn *dynbuf = NULL;
- struct elf_link_hash_entry *weaks;
- Elf_External_Sym *esym;
- Elf_External_Sym *esymend;
- struct elf_backend_data *bed;
- boolean dt_needed;
- struct elf_link_hash_table * hash_table;
- file_ptr pos;
- bfd_size_type amt;
-
- hash_table = elf_hash_table (info);
-
- bed = get_elf_backend_data (abfd);
- add_symbol_hook = bed->elf_add_symbol_hook;
- collect = bed->collect;
-
- if ((abfd->flags & DYNAMIC) == 0)
- dynamic = false;
- else
- {
- dynamic = true;
-
- /* You can't use -r against a dynamic object. Also, there's no
- hope of using a dynamic object which does not exactly match
- the format of the output file. */
- if (info->relocateable || info->hash->creator != abfd->xvec)
- {
- bfd_set_error (bfd_error_invalid_operation);
- goto error_return;
- }
- }
-
- /* As a GNU extension, any input sections which are named
- .gnu.warning.SYMBOL are treated as warning symbols for the given
- symbol. This differs from .gnu.warning sections, which generate
- warnings when they are included in an output file. */
- if (! info->shared)
- {
- asection *s;
-
- for (s = abfd->sections; s != NULL; s = s->next)
- {
- const char *name;
-
- name = bfd_get_section_name (abfd, s);
- if (strncmp (name, ".gnu.warning.", sizeof ".gnu.warning." - 1) == 0)
- {
- char *msg;
- bfd_size_type sz;
-
- name += sizeof ".gnu.warning." - 1;
-
- /* If this is a shared object, then look up the symbol
- in the hash table. If it is there, and it is already
- been defined, then we will not be using the entry
- from this shared object, so we don't need to warn.
- FIXME: If we see the definition in a regular object
- later on, we will warn, but we shouldn't. The only
- fix is to keep track of what warnings we are supposed
- to emit, and then handle them all at the end of the
- link. */
- if (dynamic && abfd->xvec == info->hash->creator)
- {
- struct elf_link_hash_entry *h;
-
- h = elf_link_hash_lookup (hash_table, name,
- false, false, true);
-
- /* FIXME: What about bfd_link_hash_common? */
- if (h != NULL
- && (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak))
- {
- /* We don't want to issue this warning. Clobber
- the section size so that the warning does not
- get copied into the output file. */
- s->_raw_size = 0;
- continue;
- }
- }
-
- sz = bfd_section_size (abfd, s);
- msg = (char *) bfd_alloc (abfd, sz + 1);
- if (msg == NULL)
- goto error_return;
-
- if (! bfd_get_section_contents (abfd, s, msg, (file_ptr) 0, sz))
- goto error_return;
-
- msg[sz] = '\0';
-
- if (! (_bfd_generic_link_add_one_symbol
- (info, abfd, name, BSF_WARNING, s, (bfd_vma) 0, msg,
- false, collect, (struct bfd_link_hash_entry **) NULL)))
- goto error_return;
-
- if (! info->relocateable)
- {
- /* Clobber the section size so that the warning does
- not get copied into the output file. */
- s->_raw_size = 0;
- }
- }
- }
- }
-
- /* If this is a dynamic object, we always link against the .dynsym
- symbol table, not the .symtab symbol table. The dynamic linker
- will only see the .dynsym symbol table, so there is no reason to
- look at .symtab for a dynamic object. */
-
- if (! dynamic || elf_dynsymtab (abfd) == 0)
- {
- hdr = &elf_tdata (abfd)->symtab_hdr;
- shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
- }
- else
- {
- hdr = &elf_tdata (abfd)->dynsymtab_hdr;
- shndx_hdr = NULL;
- }
-
- if (dynamic)
- {
- /* Read in any version definitions. */
-
- if (! _bfd_elf_slurp_version_tables (abfd))
- goto error_return;
-
- /* Read in the symbol versions, but don't bother to convert them
- to internal format. */
- if (elf_dynversym (abfd) != 0)
- {
- Elf_Internal_Shdr *versymhdr;
-
- versymhdr = &elf_tdata (abfd)->dynversym_hdr;
- extversym = (Elf_External_Versym *) bfd_malloc (versymhdr->sh_size);
- if (extversym == NULL)
- goto error_return;
- amt = versymhdr->sh_size;
- if (bfd_seek (abfd, versymhdr->sh_offset, SEEK_SET) != 0
- || bfd_bread ((PTR) extversym, amt, abfd) != amt)
- goto error_return;
- }
- }
-
- symcount = hdr->sh_size / sizeof (Elf_External_Sym);
-
- /* The sh_info field of the symtab header tells us where the
- external symbols start. We don't care about the local symbols at
- this point. */
- if (elf_bad_symtab (abfd))
- {
- extsymcount = symcount;
- extsymoff = 0;
- }
- else
- {
- extsymcount = symcount - hdr->sh_info;
- extsymoff = hdr->sh_info;
- }
-
- amt = extsymcount * sizeof (Elf_External_Sym);
- buf = (Elf_External_Sym *) bfd_malloc (amt);
- if (buf == NULL && extsymcount != 0)
- goto error_return;
-
- if (shndx_hdr != NULL && shndx_hdr->sh_size != 0)
- {
- amt = extsymcount * sizeof (Elf_External_Sym_Shndx);
- shndx_buf = (Elf_External_Sym_Shndx *) bfd_malloc (amt);
- if (shndx_buf == NULL && extsymcount != 0)
- goto error_return;
- }
-
- /* We store a pointer to the hash table entry for each external
- symbol. */
- amt = extsymcount * sizeof (struct elf_link_hash_entry *);
- sym_hash = (struct elf_link_hash_entry **) bfd_alloc (abfd, amt);
- if (sym_hash == NULL)
- goto error_return;
- elf_sym_hashes (abfd) = sym_hash;
-
- dt_needed = false;
-
- if (! dynamic)
- {
- /* If we are creating a shared library, create all the dynamic
- sections immediately. We need to attach them to something,
- so we attach them to this BFD, provided it is the right
- format. FIXME: If there are no input BFD's of the same
- format as the output, we can't make a shared library. */
- if (info->shared
- && is_elf_hash_table (info)
- && ! hash_table->dynamic_sections_created
- && abfd->xvec == info->hash->creator)
- {
- if (! elf_link_create_dynamic_sections (abfd, info))
- goto error_return;
- }
- }
- else if (! is_elf_hash_table (info))
- goto error_return;
- else
- {
- asection *s;
- boolean add_needed;
- const char *name;
- bfd_size_type oldsize;
- bfd_size_type strindex;
-
- /* Find the name to use in a DT_NEEDED entry that refers to this
- object. If the object has a DT_SONAME entry, we use it.
- Otherwise, if the generic linker stuck something in
- elf_dt_name, we use that. Otherwise, we just use the file
- name. If the generic linker put a null string into
- elf_dt_name, we don't make a DT_NEEDED entry at all, even if
- there is a DT_SONAME entry. */
- add_needed = true;
- name = bfd_get_filename (abfd);
- if (elf_dt_name (abfd) != NULL)
- {
- name = elf_dt_name (abfd);
- if (*name == '\0')
- {
- if (elf_dt_soname (abfd) != NULL)
- dt_needed = true;
-
- add_needed = false;
- }
- }
- s = bfd_get_section_by_name (abfd, ".dynamic");
- if (s != NULL)
- {
- Elf_External_Dyn *extdyn;
- Elf_External_Dyn *extdynend;
- int elfsec;
- unsigned long shlink;
- int rpath;
- int runpath;
-
- dynbuf = (Elf_External_Dyn *) bfd_malloc (s->_raw_size);
- if (dynbuf == NULL)
- goto error_return;
-
- if (! bfd_get_section_contents (abfd, s, (PTR) dynbuf,
- (file_ptr) 0, s->_raw_size))
- goto error_return;
-
- elfsec = _bfd_elf_section_from_bfd_section (abfd, s);
- if (elfsec == -1)
- goto error_return;
- shlink = elf_elfsections (abfd)[elfsec]->sh_link;
-
- {
- /* The shared libraries distributed with hpux11 have a bogus
- sh_link field for the ".dynamic" section. This code detects
- when SHLINK refers to a section that is not a string table
- and tries to find the string table for the ".dynsym" section
- instead. */
- Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[shlink];
- if (shdr->sh_type != SHT_STRTAB)
- {
- asection *ds = bfd_get_section_by_name (abfd, ".dynsym");
- int elfdsec = _bfd_elf_section_from_bfd_section (abfd, ds);
- if (elfdsec == -1)
- goto error_return;
- shlink = elf_elfsections (abfd)[elfdsec]->sh_link;
- }
- }
-
- extdyn = dynbuf;
- extdynend = extdyn + s->_raw_size / sizeof (Elf_External_Dyn);
- rpath = 0;
- runpath = 0;
- for (; extdyn < extdynend; extdyn++)
- {
- Elf_Internal_Dyn dyn;
-
- elf_swap_dyn_in (abfd, extdyn, &dyn);
- if (dyn.d_tag == DT_SONAME)
- {
- unsigned int tagv = dyn.d_un.d_val;
- name = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
- if (name == NULL)
- goto error_return;
- }
- if (dyn.d_tag == DT_NEEDED)
- {
- struct bfd_link_needed_list *n, **pn;
- char *fnm, *anm;
- unsigned int tagv = dyn.d_un.d_val;
-
- amt = sizeof (struct bfd_link_needed_list);
- n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt);
- fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
- if (n == NULL || fnm == NULL)
- goto error_return;
- anm = bfd_alloc (abfd, (bfd_size_type) strlen (fnm) + 1);
- if (anm == NULL)
- goto error_return;
- strcpy (anm, fnm);
- n->name = anm;
- n->by = abfd;
- n->next = NULL;
- for (pn = & hash_table->needed;
- *pn != NULL;
- pn = &(*pn)->next)
- ;
- *pn = n;
- }
- if (dyn.d_tag == DT_RUNPATH)
- {
- struct bfd_link_needed_list *n, **pn;
- char *fnm, *anm;
- unsigned int tagv = dyn.d_un.d_val;
-
- /* When we see DT_RPATH before DT_RUNPATH, we have
- to clear runpath. Do _NOT_ bfd_release, as that
- frees all more recently bfd_alloc'd blocks as
- well. */
- if (rpath && hash_table->runpath)
- hash_table->runpath = NULL;
-
- amt = sizeof (struct bfd_link_needed_list);
- n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt);
- fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
- if (n == NULL || fnm == NULL)
- goto error_return;
- anm = bfd_alloc (abfd, (bfd_size_type) strlen (fnm) + 1);
- if (anm == NULL)
- goto error_return;
- strcpy (anm, fnm);
- n->name = anm;
- n->by = abfd;
- n->next = NULL;
- for (pn = & hash_table->runpath;
- *pn != NULL;
- pn = &(*pn)->next)
- ;
- *pn = n;
- runpath = 1;
- rpath = 0;
- }
- /* Ignore DT_RPATH if we have seen DT_RUNPATH. */
- if (!runpath && dyn.d_tag == DT_RPATH)
- {
- struct bfd_link_needed_list *n, **pn;
- char *fnm, *anm;
- unsigned int tagv = dyn.d_un.d_val;
-
- amt = sizeof (struct bfd_link_needed_list);
- n = (struct bfd_link_needed_list *) bfd_alloc (abfd, amt);
- fnm = bfd_elf_string_from_elf_section (abfd, shlink, tagv);
- if (n == NULL || fnm == NULL)
- goto error_return;
- anm = bfd_alloc (abfd, (bfd_size_type) strlen (fnm) + 1);
- if (anm == NULL)
- goto error_return;
- strcpy (anm, fnm);
- n->name = anm;
- n->by = abfd;
- n->next = NULL;
- for (pn = & hash_table->runpath;
- *pn != NULL;
- pn = &(*pn)->next)
- ;
- *pn = n;
- rpath = 1;
- }
- }
-
- free (dynbuf);
- dynbuf = NULL;
- }
-
- /* We do not want to include any of the sections in a dynamic
- object in the output file. We hack by simply clobbering the
- list of sections in the BFD. This could be handled more
- cleanly by, say, a new section flag; the existing
- SEC_NEVER_LOAD flag is not the one we want, because that one
- still implies that the section takes up space in the output
- file. */
- bfd_section_list_clear (abfd);
-
- /* If this is the first dynamic object found in the link, create
- the special sections required for dynamic linking. */
- if (! hash_table->dynamic_sections_created)
- if (! elf_link_create_dynamic_sections (abfd, info))
- goto error_return;
-
- if (add_needed)
- {
- /* Add a DT_NEEDED entry for this dynamic object. */
- oldsize = _bfd_elf_strtab_size (hash_table->dynstr);
- strindex = _bfd_elf_strtab_add (hash_table->dynstr, name, false);
- if (strindex == (bfd_size_type) -1)
- goto error_return;
-
- if (oldsize == _bfd_elf_strtab_size (hash_table->dynstr))
- {
- asection *sdyn;
- Elf_External_Dyn *dyncon, *dynconend;
-
- /* The hash table size did not change, which means that
- the dynamic object name was already entered. If we
- have already included this dynamic object in the
- link, just ignore it. There is no reason to include
- a particular dynamic object more than once. */
- sdyn = bfd_get_section_by_name (hash_table->dynobj, ".dynamic");
- BFD_ASSERT (sdyn != NULL);
-
- dyncon = (Elf_External_Dyn *) sdyn->contents;
- dynconend = (Elf_External_Dyn *) (sdyn->contents +
- sdyn->_raw_size);
- for (; dyncon < dynconend; dyncon++)
- {
- Elf_Internal_Dyn dyn;
-
- elf_swap_dyn_in (hash_table->dynobj, dyncon, & dyn);
- if (dyn.d_tag == DT_NEEDED
- && dyn.d_un.d_val == strindex)
- {
- if (buf != NULL)
- free (buf);
- if (extversym != NULL)
- free (extversym);
- _bfd_elf_strtab_delref (hash_table->dynstr, strindex);
- return true;
- }
- }
- }
-
- if (! elf_add_dynamic_entry (info, (bfd_vma) DT_NEEDED, strindex))
- goto error_return;
- }
-
- /* Save the SONAME, if there is one, because sometimes the
- linker emulation code will need to know it. */
- if (*name == '\0')
- name = basename (bfd_get_filename (abfd));
- elf_dt_name (abfd) = name;
- }
-
- pos = hdr->sh_offset + extsymoff * sizeof (Elf_External_Sym);
- amt = extsymcount * sizeof (Elf_External_Sym);
- if (bfd_seek (abfd, pos, SEEK_SET) != 0
- || bfd_bread ((PTR) buf, amt, abfd) != amt)
- goto error_return;
-
- if (shndx_hdr != NULL && shndx_hdr->sh_size != 0)
- {
- amt = extsymcount * sizeof (Elf_External_Sym_Shndx);
- pos = shndx_hdr->sh_offset + extsymoff * sizeof (Elf_External_Sym_Shndx);
- if (bfd_seek (abfd, pos, SEEK_SET) != 0
- || bfd_bread ((PTR) shndx_buf, amt, abfd) != amt)
- goto error_return;
- }
-
- weaks = NULL;
-
- ever = extversym != NULL ? extversym + extsymoff : NULL;
- esymend = buf + extsymcount;
- for (esym = buf, shndx = shndx_buf;
- esym < esymend;
- esym++, sym_hash++, ever = (ever != NULL ? ever + 1 : NULL),
- shndx = (shndx != NULL ? shndx + 1 : NULL))
- {
- Elf_Internal_Sym sym;
- int bind;
- bfd_vma value;
- asection *sec;
- flagword flags;
- const char *name;
- struct elf_link_hash_entry *h;
- boolean definition;
- boolean size_change_ok, type_change_ok;
- boolean new_weakdef;
- unsigned int old_alignment;
- boolean override;
-
- override = false;
-
- elf_swap_symbol_in (abfd, esym, shndx, &sym);
-
- flags = BSF_NO_FLAGS;
- sec = NULL;
- value = sym.st_value;
- *sym_hash = NULL;
-
- bind = ELF_ST_BIND (sym.st_info);
- if (bind == STB_LOCAL)
- {
- /* This should be impossible, since ELF requires that all
- global symbols follow all local symbols, and that sh_info
- point to the first global symbol. Unfortunatealy, Irix 5
- screws this up. */
- continue;
- }
- else if (bind == STB_GLOBAL)
- {
- if (sym.st_shndx != SHN_UNDEF
- && sym.st_shndx != SHN_COMMON)
- flags = BSF_GLOBAL;
- }
- else if (bind == STB_WEAK)
- flags = BSF_WEAK;
- else
- {
- /* Leave it up to the processor backend. */
- }
-
- if (sym.st_shndx == SHN_UNDEF)
- sec = bfd_und_section_ptr;
- else if (sym.st_shndx < SHN_LORESERVE || sym.st_shndx > SHN_HIRESERVE)
- {
- sec = section_from_elf_index (abfd, sym.st_shndx);
- if (sec == NULL)
- sec = bfd_abs_section_ptr;
- else if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
- value -= sec->vma;
- }
- else if (sym.st_shndx == SHN_ABS)
- sec = bfd_abs_section_ptr;
- else if (sym.st_shndx == SHN_COMMON)
- {
- sec = bfd_com_section_ptr;
- /* What ELF calls the size we call the value. What ELF
- calls the value we call the alignment. */
- value = sym.st_size;
- }
- else
- {
- /* Leave it up to the processor backend. */
- }
-
- name = bfd_elf_string_from_elf_section (abfd, hdr->sh_link, sym.st_name);
- if (name == (const char *) NULL)
- goto error_return;
-
- if (add_symbol_hook)
- {
- if (! (*add_symbol_hook) (abfd, info, &sym, &name, &flags, &sec,
- &value))
- goto error_return;
-
- /* The hook function sets the name to NULL if this symbol
- should be skipped for some reason. */
- if (name == (const char *) NULL)
- continue;
- }
-
- /* Sanity check that all possibilities were handled. */
- if (sec == (asection *) NULL)
- {
- bfd_set_error (bfd_error_bad_value);
- goto error_return;
- }
-
- if (bfd_is_und_section (sec)
- || bfd_is_com_section (sec))
- definition = false;
- else
- definition = true;
-
- size_change_ok = false;
- type_change_ok = get_elf_backend_data (abfd)->type_change_ok;
- old_alignment = 0;
- if (info->hash->creator->flavour == bfd_target_elf_flavour)
- {
- Elf_Internal_Versym iver;
- unsigned int vernum = 0;
-
- if (ever != NULL)
- {
- _bfd_elf_swap_versym_in (abfd, ever, &iver);
- vernum = iver.vs_vers & VERSYM_VERSION;
-
- /* If this is a hidden symbol, or if it is not version
- 1, we append the version name to the symbol name.
- However, we do not modify a non-hidden absolute
- symbol, because it might be the version symbol
- itself. FIXME: What if it isn't? */
- if ((iver.vs_vers & VERSYM_HIDDEN) != 0
- || (vernum > 1 && ! bfd_is_abs_section (sec)))
- {
- const char *verstr;
- unsigned int namelen;
- bfd_size_type newlen;
- char *newname, *p;
-
- if (sym.st_shndx != SHN_UNDEF)
- {
- if (vernum > elf_tdata (abfd)->dynverdef_hdr.sh_info)
- {
- (*_bfd_error_handler)
- (_("%s: %s: invalid version %u (max %d)"),
- bfd_archive_filename (abfd), name, vernum,
- elf_tdata (abfd)->dynverdef_hdr.sh_info);
- bfd_set_error (bfd_error_bad_value);
- goto error_return;
- }
- else if (vernum > 1)
- verstr =
- elf_tdata (abfd)->verdef[vernum - 1].vd_nodename;
- else
- verstr = "";
- }
- else
- {
- /* We cannot simply test for the number of
- entries in the VERNEED section since the
- numbers for the needed versions do not start
- at 0. */
- Elf_Internal_Verneed *t;
-
- verstr = NULL;
- for (t = elf_tdata (abfd)->verref;
- t != NULL;
- t = t->vn_nextref)
- {
- Elf_Internal_Vernaux *a;
-
- for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
- {
- if (a->vna_other == vernum)
- {
- verstr = a->vna_nodename;
- break;
- }
- }
- if (a != NULL)
- break;
- }
- if (verstr == NULL)
- {
- (*_bfd_error_handler)
- (_("%s: %s: invalid needed version %d"),
- bfd_archive_filename (abfd), name, vernum);
- bfd_set_error (bfd_error_bad_value);
- goto error_return;
- }
- }
-
- namelen = strlen (name);
- newlen = namelen + strlen (verstr) + 2;
- if ((iver.vs_vers & VERSYM_HIDDEN) == 0)
- ++newlen;
-
- newname = (char *) bfd_alloc (abfd, newlen);
- if (newname == NULL)
- goto error_return;
- strcpy (newname, name);
- p = newname + namelen;
- *p++ = ELF_VER_CHR;
- /* If this is a defined non-hidden version symbol,
- we add another @ to the name. This indicates the
- default version of the symbol. */
- if ((iver.vs_vers & VERSYM_HIDDEN) == 0
- && sym.st_shndx != SHN_UNDEF)
- *p++ = ELF_VER_CHR;
- strcpy (p, verstr);
-
- name = newname;
- }
- }
-
- if (! elf_merge_symbol (abfd, info, name, &sym, &sec, &value,
- sym_hash, &override, &type_change_ok,
- &size_change_ok, dt_needed))
- goto error_return;
-
- if (override)
- definition = false;
-
- h = *sym_hash;
- while (h->root.type == bfd_link_hash_indirect
- || h->root.type == bfd_link_hash_warning)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
-
- /* Remember the old alignment if this is a common symbol, so
- that we don't reduce the alignment later on. We can't
- check later, because _bfd_generic_link_add_one_symbol
- will set a default for the alignment which we want to
- override. */
- if (h->root.type == bfd_link_hash_common)
- old_alignment = h->root.u.c.p->alignment_power;
-
- if (elf_tdata (abfd)->verdef != NULL
- && ! override
- && vernum > 1
- && definition)
- h->verinfo.verdef = &elf_tdata (abfd)->verdef[vernum - 1];
- }
-
- if (! (_bfd_generic_link_add_one_symbol
- (info, abfd, name, flags, sec, value, (const char *) NULL,
- false, collect, (struct bfd_link_hash_entry **) sym_hash)))
- goto error_return;
-
- h = *sym_hash;
- while (h->root.type == bfd_link_hash_indirect
- || h->root.type == bfd_link_hash_warning)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
- *sym_hash = h;
-
- new_weakdef = false;
- if (dynamic
- && definition
- && (flags & BSF_WEAK) != 0
- && ELF_ST_TYPE (sym.st_info) != STT_FUNC
- && info->hash->creator->flavour == bfd_target_elf_flavour
- && h->weakdef == NULL)
- {
- /* Keep a list of all weak defined non function symbols from
- a dynamic object, using the weakdef field. Later in this
- function we will set the weakdef field to the correct
- value. We only put non-function symbols from dynamic
- objects on this list, because that happens to be the only
- time we need to know the normal symbol corresponding to a
- weak symbol, and the information is time consuming to
- figure out. If the weakdef field is not already NULL,
- then this symbol was already defined by some previous
- dynamic object, and we will be using that previous
- definition anyhow. */
-
- h->weakdef = weaks;
- weaks = h;
- new_weakdef = true;
- }
-
- /* Set the alignment of a common symbol. */
- if (sym.st_shndx == SHN_COMMON
- && h->root.type == bfd_link_hash_common)
- {
- unsigned int align;
-
- align = bfd_log2 (sym.st_value);
- if (align > old_alignment
- /* Permit an alignment power of zero if an alignment of one
- is specified and no other alignments have been specified. */
- || (sym.st_value == 1 && old_alignment == 0))
- h->root.u.c.p->alignment_power = align;
- }
-
- if (info->hash->creator->flavour == bfd_target_elf_flavour)
- {
- int old_flags;
- boolean dynsym;
- int new_flag;
-
- /* Remember the symbol size and type. */
- if (sym.st_size != 0
- && (definition || h->size == 0))
- {
- if (h->size != 0 && h->size != sym.st_size && ! size_change_ok)
- (*_bfd_error_handler)
- (_("Warning: size of symbol `%s' changed from %lu to %lu in %s"),
- name, (unsigned long) h->size, (unsigned long) sym.st_size,
- bfd_archive_filename (abfd));
-
- h->size = sym.st_size;
- }
-
- /* If this is a common symbol, then we always want H->SIZE
- to be the size of the common symbol. The code just above
- won't fix the size if a common symbol becomes larger. We
- don't warn about a size change here, because that is
- covered by --warn-common. */
- if (h->root.type == bfd_link_hash_common)
- h->size = h->root.u.c.size;
-
- if (ELF_ST_TYPE (sym.st_info) != STT_NOTYPE
- && (definition || h->type == STT_NOTYPE))
- {
- if (h->type != STT_NOTYPE
- && h->type != ELF_ST_TYPE (sym.st_info)
- && ! type_change_ok)
- (*_bfd_error_handler)
- (_("Warning: type of symbol `%s' changed from %d to %d in %s"),
- name, h->type, ELF_ST_TYPE (sym.st_info),
- bfd_archive_filename (abfd));
-
- h->type = ELF_ST_TYPE (sym.st_info);
- }
-
- /* If st_other has a processor-specific meaning, specific code
- might be needed here. */
- if (sym.st_other != 0)
- {
- /* Combine visibilities, using the most constraining one. */
- unsigned char hvis = ELF_ST_VISIBILITY (h->other);
- unsigned char symvis = ELF_ST_VISIBILITY (sym.st_other);
-
- if (symvis && (hvis > symvis || hvis == 0))
- h->other = sym.st_other;
-
- /* If neither has visibility, use the st_other of the
- definition. This is an arbitrary choice, since the
- other bits have no general meaning. */
- if (!symvis && !hvis
- && (definition || h->other == 0))
- h->other = sym.st_other;
- }
-
- /* Set a flag in the hash table entry indicating the type of
- reference or definition we just found. Keep a count of
- the number of dynamic symbols we find. A dynamic symbol
- is one which is referenced or defined by both a regular
- object and a shared object. */
- old_flags = h->elf_link_hash_flags;
- dynsym = false;
- if (! dynamic)
- {
- if (! definition)
- {
- new_flag = ELF_LINK_HASH_REF_REGULAR;
- if (bind != STB_WEAK)
- new_flag |= ELF_LINK_HASH_REF_REGULAR_NONWEAK;
- }
- else
- new_flag = ELF_LINK_HASH_DEF_REGULAR;
- if (info->shared
- || (old_flags & (ELF_LINK_HASH_DEF_DYNAMIC
- | ELF_LINK_HASH_REF_DYNAMIC)) != 0)
- dynsym = true;
- }
- else
- {
- if (! definition)
- new_flag = ELF_LINK_HASH_REF_DYNAMIC;
- else
- new_flag = ELF_LINK_HASH_DEF_DYNAMIC;
- if ((old_flags & (ELF_LINK_HASH_DEF_REGULAR
- | ELF_LINK_HASH_REF_REGULAR)) != 0
- || (h->weakdef != NULL
- && ! new_weakdef
- && h->weakdef->dynindx != -1))
- dynsym = true;
- }
-
- h->elf_link_hash_flags |= new_flag;
-
- /* Check to see if we need to add an indirect symbol for
- the default name. */
- if (definition || h->root.type == bfd_link_hash_common)
- if (! elf_add_default_symbol (abfd, info, h, name, &sym,
- &sec, &value, &dynsym,
- override, dt_needed))
- goto error_return;
-
- if (dynsym && h->dynindx == -1)
- {
- if (! _bfd_elf_link_record_dynamic_symbol (info, h))
- goto error_return;
- if (h->weakdef != NULL
- && ! new_weakdef
- && h->weakdef->dynindx == -1)
- {
- if (! _bfd_elf_link_record_dynamic_symbol (info, h->weakdef))
- goto error_return;
- }
- }
- else if (dynsym && h->dynindx != -1)
- /* If the symbol already has a dynamic index, but
- visibility says it should not be visible, turn it into
- a local symbol. */
- switch (ELF_ST_VISIBILITY (h->other))
- {
- case STV_INTERNAL:
- case STV_HIDDEN:
- (*bed->elf_backend_hide_symbol) (info, h, true);
- break;
- }
-
- if (dt_needed && definition
- && (h->elf_link_hash_flags
- & ELF_LINK_HASH_REF_REGULAR) != 0)
- {
- bfd_size_type oldsize;
- bfd_size_type strindex;
-
- if (! is_elf_hash_table (info))
- goto error_return;
-
- /* The symbol from a DT_NEEDED object is referenced from
- the regular object to create a dynamic executable. We
- have to make sure there is a DT_NEEDED entry for it. */
-
- dt_needed = false;
- oldsize = _bfd_elf_strtab_size (hash_table->dynstr);
- strindex = _bfd_elf_strtab_add (hash_table->dynstr,
- elf_dt_soname (abfd), false);
- if (strindex == (bfd_size_type) -1)
- goto error_return;
-
- if (oldsize == _bfd_elf_strtab_size (hash_table->dynstr))
- {
- asection *sdyn;
- Elf_External_Dyn *dyncon, *dynconend;
-
- sdyn = bfd_get_section_by_name (hash_table->dynobj,
- ".dynamic");
- BFD_ASSERT (sdyn != NULL);
-
- dyncon = (Elf_External_Dyn *) sdyn->contents;
- dynconend = (Elf_External_Dyn *) (sdyn->contents +
- sdyn->_raw_size);
- for (; dyncon < dynconend; dyncon++)
- {
- Elf_Internal_Dyn dyn;
-
- elf_swap_dyn_in (hash_table->dynobj,
- dyncon, &dyn);
- BFD_ASSERT (dyn.d_tag != DT_NEEDED ||
- dyn.d_un.d_val != strindex);
- }
- }
-
- if (! elf_add_dynamic_entry (info, (bfd_vma) DT_NEEDED, strindex))
- goto error_return;
- }
- }
- }
-
- /* Now set the weakdefs field correctly for all the weak defined
- symbols we found. The only way to do this is to search all the
- symbols. Since we only need the information for non functions in
- dynamic objects, that's the only time we actually put anything on
- the list WEAKS. We need this information so that if a regular
- object refers to a symbol defined weakly in a dynamic object, the
- real symbol in the dynamic object is also put in the dynamic
- symbols; we also must arrange for both symbols to point to the
- same memory location. We could handle the general case of symbol
- aliasing, but a general symbol alias can only be generated in
- assembler code, handling it correctly would be very time
- consuming, and other ELF linkers don't handle general aliasing
- either. */
- while (weaks != NULL)
- {
- struct elf_link_hash_entry *hlook;
- asection *slook;
- bfd_vma vlook;
- struct elf_link_hash_entry **hpp;
- struct elf_link_hash_entry **hppend;
-
- hlook = weaks;
- weaks = hlook->weakdef;
- hlook->weakdef = NULL;
-
- BFD_ASSERT (hlook->root.type == bfd_link_hash_defined
- || hlook->root.type == bfd_link_hash_defweak
- || hlook->root.type == bfd_link_hash_common
- || hlook->root.type == bfd_link_hash_indirect);
- slook = hlook->root.u.def.section;
- vlook = hlook->root.u.def.value;
-
- hpp = elf_sym_hashes (abfd);
- hppend = hpp + extsymcount;
- for (; hpp < hppend; hpp++)
- {
- struct elf_link_hash_entry *h;
-
- h = *hpp;
- if (h != NULL && h != hlook
- && h->root.type == bfd_link_hash_defined
- && h->root.u.def.section == slook
- && h->root.u.def.value == vlook)
- {
- hlook->weakdef = h;
-
- /* If the weak definition is in the list of dynamic
- symbols, make sure the real definition is put there
- as well. */
- if (hlook->dynindx != -1
- && h->dynindx == -1)
- {
- if (! _bfd_elf_link_record_dynamic_symbol (info, h))
- goto error_return;
- }
-
- /* If the real definition is in the list of dynamic
- symbols, make sure the weak definition is put there
- as well. If we don't do this, then the dynamic
- loader might not merge the entries for the real
- definition and the weak definition. */
- if (h->dynindx != -1
- && hlook->dynindx == -1)
- {
- if (! _bfd_elf_link_record_dynamic_symbol (info, hlook))
- goto error_return;
- }
-
- break;
- }
- }
- }
-
- if (buf != NULL)
- {
- free (buf);
- buf = NULL;
- }
-
- if (extversym != NULL)
- {
- free (extversym);
- extversym = NULL;
- }
-
- /* If this object is the same format as the output object, and it is
- not a shared library, then let the backend look through the
- relocs.
-
- This is required to build global offset table entries and to
- arrange for dynamic relocs. It is not required for the
- particular common case of linking non PIC code, even when linking
- against shared libraries, but unfortunately there is no way of
- knowing whether an object file has been compiled PIC or not.
- Looking through the relocs is not particularly time consuming.
- The problem is that we must either (1) keep the relocs in memory,
- which causes the linker to require additional runtime memory or
- (2) read the relocs twice from the input file, which wastes time.
- This would be a good case for using mmap.
-
- I have no idea how to handle linking PIC code into a file of a
- different format. It probably can't be done. */
- check_relocs = get_elf_backend_data (abfd)->check_relocs;
- if (! dynamic
- && abfd->xvec == info->hash->creator
- && check_relocs != NULL)
- {
- asection *o;
-
- for (o = abfd->sections; o != NULL; o = o->next)
- {
- Elf_Internal_Rela *internal_relocs;
- boolean ok;
-
- if ((o->flags & SEC_RELOC) == 0
- || o->reloc_count == 0
- || ((info->strip == strip_all || info->strip == strip_debugger)
- && (o->flags & SEC_DEBUGGING) != 0)
- || bfd_is_abs_section (o->output_section))
- continue;
-
- internal_relocs = (NAME(_bfd_elf,link_read_relocs)
- (abfd, o, (PTR) NULL,
- (Elf_Internal_Rela *) NULL,
- info->keep_memory));
- if (internal_relocs == NULL)
- goto error_return;
-
- ok = (*check_relocs) (abfd, info, o, internal_relocs);
-
- if (! info->keep_memory)
- free (internal_relocs);
-
- if (! ok)
- goto error_return;
- }
- }
-
- /* If this is a non-traditional, non-relocateable link, try to
- optimize the handling of the .stab/.stabstr sections. */
- if (! dynamic
- && ! info->relocateable
- && ! info->traditional_format
- && info->hash->creator->flavour == bfd_target_elf_flavour
- && is_elf_hash_table (info)
- && (info->strip != strip_all && info->strip != strip_debugger))
- {
- asection *stab, *stabstr;
-
- stab = bfd_get_section_by_name (abfd, ".stab");
- if (stab != NULL && !(stab->flags & SEC_MERGE))
- {
- stabstr = bfd_get_section_by_name (abfd, ".stabstr");
-
- if (stabstr != NULL)
- {
- struct bfd_elf_section_data *secdata;
-
- secdata = elf_section_data (stab);
- if (! _bfd_link_section_stabs (abfd,
- & hash_table->stab_info,
- stab, stabstr,
- &secdata->sec_info))
- goto error_return;
- if (secdata->sec_info)
- secdata->sec_info_type = ELF_INFO_TYPE_STABS;
- }
- }
- }
-
- if (! info->relocateable && ! dynamic
- && is_elf_hash_table (info))
- {
- asection *s;
-
- for (s = abfd->sections; s != NULL; s = s->next)
- if (s->flags & SEC_MERGE)
- {
- struct bfd_elf_section_data *secdata;
-
- secdata = elf_section_data (s);
- if (! _bfd_merge_section (abfd,
- & hash_table->merge_info,
- s, &secdata->sec_info))
- goto error_return;
- else if (secdata->sec_info)
- secdata->sec_info_type = ELF_INFO_TYPE_MERGE;
- }
- }
-
- return true;
-
- error_return:
- if (buf != NULL)
- free (buf);
- if (dynbuf != NULL)
- free (dynbuf);
- if (extversym != NULL)
- free (extversym);
- return false;
-}
-
-/* Create some sections which will be filled in with dynamic linking
- information. ABFD is an input file which requires dynamic sections
- to be created. The dynamic sections take up virtual memory space
- when the final executable is run, so we need to create them before
- addresses are assigned to the output sections. We work out the
- actual contents and size of these sections later. */
-
-boolean
-elf_link_create_dynamic_sections (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
-{
- flagword flags;
- register asection *s;
- struct elf_link_hash_entry *h;
- struct elf_backend_data *bed;
-
- if (! is_elf_hash_table (info))
- return false;
-
- if (elf_hash_table (info)->dynamic_sections_created)
- return true;
-
- /* Make sure that all dynamic sections use the same input BFD. */
- if (elf_hash_table (info)->dynobj == NULL)
- elf_hash_table (info)->dynobj = abfd;
- else
- abfd = elf_hash_table (info)->dynobj;
-
- /* Note that we set the SEC_IN_MEMORY flag for all of these
- sections. */
- flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
- | SEC_IN_MEMORY | SEC_LINKER_CREATED);
-
- /* A dynamically linked executable has a .interp section, but a
- shared library does not. */
- if (! info->shared)
- {
- s = bfd_make_section (abfd, ".interp");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY))
- return false;
- }
-
- if (! info->traditional_format
- && info->hash->creator->flavour == bfd_target_elf_flavour)
- {
- s = bfd_make_section (abfd, ".eh_frame_hdr");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
- || ! bfd_set_section_alignment (abfd, s, 2))
- return false;
- }
-
- /* Create sections to hold version informations. These are removed
- if they are not needed. */
- s = bfd_make_section (abfd, ".gnu.version_d");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
- || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN))
- return false;
-
- s = bfd_make_section (abfd, ".gnu.version");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
- || ! bfd_set_section_alignment (abfd, s, 1))
- return false;
-
- s = bfd_make_section (abfd, ".gnu.version_r");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
- || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN))
- return false;
-
- s = bfd_make_section (abfd, ".dynsym");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
- || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN))
- return false;
-
- s = bfd_make_section (abfd, ".dynstr");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY))
- return false;
-
- /* Create a strtab to hold the dynamic symbol names. */
- if (elf_hash_table (info)->dynstr == NULL)
- {
- elf_hash_table (info)->dynstr = _bfd_elf_strtab_init ();
- if (elf_hash_table (info)->dynstr == NULL)
- return false;
- }
-
- s = bfd_make_section (abfd, ".dynamic");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags)
- || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN))
- return false;
-
- /* The special symbol _DYNAMIC is always set to the start of the
- .dynamic section. This call occurs before we have processed the
- symbols for any dynamic object, so we don't have to worry about
- overriding a dynamic definition. We could set _DYNAMIC in a
- linker script, but we only want to define it if we are, in fact,
- creating a .dynamic section. We don't want to define it if there
- is no .dynamic section, since on some ELF platforms the start up
- code examines it to decide how to initialize the process. */
- h = NULL;
- if (! (_bfd_generic_link_add_one_symbol
- (info, abfd, "_DYNAMIC", BSF_GLOBAL, s, (bfd_vma) 0,
- (const char *) NULL, false, get_elf_backend_data (abfd)->collect,
- (struct bfd_link_hash_entry **) &h)))
- return false;
- h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
- h->type = STT_OBJECT;
-
- if (info->shared
- && ! _bfd_elf_link_record_dynamic_symbol (info, h))
- return false;
-
- bed = get_elf_backend_data (abfd);
-
- s = bfd_make_section (abfd, ".hash");
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
- || ! bfd_set_section_alignment (abfd, s, LOG_FILE_ALIGN))
- return false;
- elf_section_data (s)->this_hdr.sh_entsize = bed->s->sizeof_hash_entry;
-
- /* Let the backend create the rest of the sections. This lets the
- backend set the right flags. The backend will normally create
- the .got and .plt sections. */
- if (! (*bed->elf_backend_create_dynamic_sections) (abfd, info))
- return false;
-
- elf_hash_table (info)->dynamic_sections_created = true;
-
- return true;
-}
-
-/* Add an entry to the .dynamic table. */
-
-boolean
-elf_add_dynamic_entry (info, tag, val)
- struct bfd_link_info *info;
- bfd_vma tag;
- bfd_vma val;
-{
- Elf_Internal_Dyn dyn;
- bfd *dynobj;
- asection *s;
- bfd_size_type newsize;
- bfd_byte *newcontents;
-
- if (! is_elf_hash_table (info))
- return false;
-
- dynobj = elf_hash_table (info)->dynobj;
-
- s = bfd_get_section_by_name (dynobj, ".dynamic");
- BFD_ASSERT (s != NULL);
-
- newsize = s->_raw_size + sizeof (Elf_External_Dyn);
- newcontents = (bfd_byte *) bfd_realloc (s->contents, newsize);
- if (newcontents == NULL)
- return false;
-
- dyn.d_tag = tag;
- dyn.d_un.d_val = val;
- elf_swap_dyn_out (dynobj, &dyn,
- (Elf_External_Dyn *) (newcontents + s->_raw_size));
-
- s->_raw_size = newsize;
- s->contents = newcontents;
-
- return true;
-}
-
-/* Record a new local dynamic symbol. */
-
-boolean
-elf_link_record_local_dynamic_symbol (info, input_bfd, input_indx)
- struct bfd_link_info *info;
- bfd *input_bfd;
- long input_indx;
-{
- struct elf_link_local_dynamic_entry *entry;
- struct elf_link_hash_table *eht;
- struct elf_strtab_hash *dynstr;
- Elf_External_Sym esym;
- Elf_External_Sym_Shndx eshndx;
- Elf_External_Sym_Shndx *shndx;
- unsigned long dynstr_index;
- char *name;
- file_ptr pos;
- bfd_size_type amt;
-
- if (! is_elf_hash_table (info))
- return false;
-
- /* See if the entry exists already. */
- for (entry = elf_hash_table (info)->dynlocal; entry ; entry = entry->next)
- if (entry->input_bfd == input_bfd && entry->input_indx == input_indx)
- return true;
-
- entry = (struct elf_link_local_dynamic_entry *)
- bfd_alloc (input_bfd, (bfd_size_type) sizeof (*entry));
- if (entry == NULL)
- return false;
-
- /* Go find the symbol, so that we can find it's name. */
- amt = sizeof (Elf_External_Sym);
- pos = elf_tdata (input_bfd)->symtab_hdr.sh_offset + input_indx * amt;
- if (bfd_seek (input_bfd, pos, SEEK_SET) != 0
- || bfd_bread ((PTR) &esym, amt, input_bfd) != amt)
- return false;
- shndx = NULL;
- if (elf_tdata (input_bfd)->symtab_shndx_hdr.sh_size != 0)
- {
- amt = sizeof (Elf_External_Sym_Shndx);
- pos = elf_tdata (input_bfd)->symtab_shndx_hdr.sh_offset;
- pos += input_indx * amt;
- shndx = &eshndx;
- if (bfd_seek (input_bfd, pos, SEEK_SET) != 0
- || bfd_bread ((PTR) shndx, amt, input_bfd) != amt)
- return false;
- }
- elf_swap_symbol_in (input_bfd, &esym, shndx, &entry->isym);
-
- name = (bfd_elf_string_from_elf_section
- (input_bfd, elf_tdata (input_bfd)->symtab_hdr.sh_link,
- entry->isym.st_name));
-
- dynstr = elf_hash_table (info)->dynstr;
- if (dynstr == NULL)
- {
- /* Create a strtab to hold the dynamic symbol names. */
- elf_hash_table (info)->dynstr = dynstr = _bfd_elf_strtab_init ();
- if (dynstr == NULL)
- return false;
- }
-
- dynstr_index = _bfd_elf_strtab_add (dynstr, name, false);
- if (dynstr_index == (unsigned long) -1)
- return false;
- entry->isym.st_name = dynstr_index;
-
- eht = elf_hash_table (info);
-
- entry->next = eht->dynlocal;
- eht->dynlocal = entry;
- entry->input_bfd = input_bfd;
- entry->input_indx = input_indx;
- eht->dynsymcount++;
-
- /* Whatever binding the symbol had before, it's now local. */
- entry->isym.st_info
- = ELF_ST_INFO (STB_LOCAL, ELF_ST_TYPE (entry->isym.st_info));
-
- /* The dynindx will be set at the end of size_dynamic_sections. */
-
- return true;
-}
-
-/* Read and swap the relocs from the section indicated by SHDR. This
- may be either a REL or a RELA section. The relocations are
- translated into RELA relocations and stored in INTERNAL_RELOCS,
- which should have already been allocated to contain enough space.
- The EXTERNAL_RELOCS are a buffer where the external form of the
- relocations should be stored.
-
- Returns false if something goes wrong. */
-
-static boolean
-elf_link_read_relocs_from_section (abfd, shdr, external_relocs,
- internal_relocs)
- bfd *abfd;
- Elf_Internal_Shdr *shdr;
- PTR external_relocs;
- Elf_Internal_Rela *internal_relocs;
-{
- struct elf_backend_data *bed;
- bfd_size_type amt;
-
- /* If there aren't any relocations, that's OK. */
- if (!shdr)
- return true;
-
- /* Position ourselves at the start of the section. */
- if (bfd_seek (abfd, shdr->sh_offset, SEEK_SET) != 0)
- return false;
-
- /* Read the relocations. */
- if (bfd_bread (external_relocs, shdr->sh_size, abfd) != shdr->sh_size)
- return false;
-
- bed = get_elf_backend_data (abfd);
-
- /* Convert the external relocations to the internal format. */
- if (shdr->sh_entsize == sizeof (Elf_External_Rel))
- {
- Elf_External_Rel *erel;
- Elf_External_Rel *erelend;
- Elf_Internal_Rela *irela;
- Elf_Internal_Rel *irel;
-
- erel = (Elf_External_Rel *) external_relocs;
- erelend = erel + NUM_SHDR_ENTRIES (shdr);
- irela = internal_relocs;
- amt = bed->s->int_rels_per_ext_rel * sizeof (Elf_Internal_Rel);
- irel = bfd_alloc (abfd, amt);
- for (; erel < erelend; erel++, irela += bed->s->int_rels_per_ext_rel)
- {
- unsigned int i;
-
- if (bed->s->swap_reloc_in)
- (*bed->s->swap_reloc_in) (abfd, (bfd_byte *) erel, irel);
- else
- elf_swap_reloc_in (abfd, erel, irel);
-
- for (i = 0; i < bed->s->int_rels_per_ext_rel; ++i)
- {
- irela[i].r_offset = irel[i].r_offset;
- irela[i].r_info = irel[i].r_info;
- irela[i].r_addend = 0;
- }
- }
- }
- else
- {
- Elf_External_Rela *erela;
- Elf_External_Rela *erelaend;
- Elf_Internal_Rela *irela;
-
- BFD_ASSERT (shdr->sh_entsize == sizeof (Elf_External_Rela));
-
- erela = (Elf_External_Rela *) external_relocs;
- erelaend = erela + NUM_SHDR_ENTRIES (shdr);
- irela = internal_relocs;
- for (; erela < erelaend; erela++, irela += bed->s->int_rels_per_ext_rel)
- {
- if (bed->s->swap_reloca_in)
- (*bed->s->swap_reloca_in) (abfd, (bfd_byte *) erela, irela);
- else
- elf_swap_reloca_in (abfd, erela, irela);
- }
- }
-
- return true;
-}
-
-/* Read and swap the relocs for a section O. They may have been
- cached. If the EXTERNAL_RELOCS and INTERNAL_RELOCS arguments are
- not NULL, they are used as buffers to read into. They are known to
- be large enough. If the INTERNAL_RELOCS relocs argument is NULL,
- the return value is allocated using either malloc or bfd_alloc,
- according to the KEEP_MEMORY argument. If O has two relocation
- sections (both REL and RELA relocations), then the REL_HDR
- relocations will appear first in INTERNAL_RELOCS, followed by the
- REL_HDR2 relocations. */
-
-Elf_Internal_Rela *
-NAME(_bfd_elf,link_read_relocs) (abfd, o, external_relocs, internal_relocs,
- keep_memory)
- bfd *abfd;
- asection *o;
- PTR external_relocs;
- Elf_Internal_Rela *internal_relocs;
- boolean keep_memory;
-{
- Elf_Internal_Shdr *rel_hdr;
- PTR alloc1 = NULL;
- Elf_Internal_Rela *alloc2 = NULL;
- struct elf_backend_data *bed = get_elf_backend_data (abfd);
-
- if (elf_section_data (o)->relocs != NULL)
- return elf_section_data (o)->relocs;
-
- if (o->reloc_count == 0)
- return NULL;
-
- rel_hdr = &elf_section_data (o)->rel_hdr;
-
- if (internal_relocs == NULL)
- {
- bfd_size_type size;
-
- size = o->reloc_count;
- size *= bed->s->int_rels_per_ext_rel * sizeof (Elf_Internal_Rela);
- if (keep_memory)
- internal_relocs = (Elf_Internal_Rela *) bfd_alloc (abfd, size);
- else
- internal_relocs = alloc2 = (Elf_Internal_Rela *) bfd_malloc (size);
- if (internal_relocs == NULL)
- goto error_return;
- }
-
- if (external_relocs == NULL)
- {
- bfd_size_type size = rel_hdr->sh_size;
-
- if (elf_section_data (o)->rel_hdr2)
- size += elf_section_data (o)->rel_hdr2->sh_size;
- alloc1 = (PTR) bfd_malloc (size);
- if (alloc1 == NULL)
- goto error_return;
- external_relocs = alloc1;
- }
-
- if (!elf_link_read_relocs_from_section (abfd, rel_hdr,
- external_relocs,
- internal_relocs))
- goto error_return;
- if (!elf_link_read_relocs_from_section
- (abfd,
- elf_section_data (o)->rel_hdr2,
- ((bfd_byte *) external_relocs) + rel_hdr->sh_size,
- internal_relocs + (NUM_SHDR_ENTRIES (rel_hdr)
- * bed->s->int_rels_per_ext_rel)))
- goto error_return;
-
- /* Cache the results for next time, if we can. */
- if (keep_memory)
- elf_section_data (o)->relocs = internal_relocs;
-
- if (alloc1 != NULL)
- free (alloc1);
-
- /* Don't free alloc2, since if it was allocated we are passing it
- back (under the name of internal_relocs). */
-
- return internal_relocs;
-
- error_return:
- if (alloc1 != NULL)
- free (alloc1);
- if (alloc2 != NULL)
- free (alloc2);
- return NULL;
-}
-
-/* Record an assignment to a symbol made by a linker script. We need
- this in case some dynamic object refers to this symbol. */
-
-boolean
-NAME(bfd_elf,record_link_assignment) (output_bfd, info, name, provide)
- bfd *output_bfd ATTRIBUTE_UNUSED;
- struct bfd_link_info *info;
- const char *name;
- boolean provide;
-{
- struct elf_link_hash_entry *h;
-
- if (info->hash->creator->flavour != bfd_target_elf_flavour)
- return true;
-
- h = elf_link_hash_lookup (elf_hash_table (info), name, true, true, false);
- if (h == NULL)
- return false;
-
- if (h->root.type == bfd_link_hash_new)
- h->elf_link_hash_flags &= ~ELF_LINK_NON_ELF;
-
- /* If this symbol is being provided by the linker script, and it is
- currently defined by a dynamic object, but not by a regular
- object, then mark it as undefined so that the generic linker will
- force the correct value. */
- if (provide
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
- h->root.type = bfd_link_hash_undefined;
-
- /* If this symbol is not being provided by the linker script, and it is
- currently defined by a dynamic object, but not by a regular object,
- then clear out any version information because the symbol will not be
- associated with the dynamic object any more. */
- if (!provide
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
- h->verinfo.verdef = NULL;
-
- h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
-
- if (((h->elf_link_hash_flags & (ELF_LINK_HASH_DEF_DYNAMIC
- | ELF_LINK_HASH_REF_DYNAMIC)) != 0
- || info->shared)
- && h->dynindx == -1)
- {
- if (! _bfd_elf_link_record_dynamic_symbol (info, h))
- return false;
-
- /* If this is a weak defined symbol, and we know a corresponding
- real symbol from the same dynamic object, make sure the real
- symbol is also made into a dynamic symbol. */
- if (h->weakdef != NULL
- && h->weakdef->dynindx == -1)
- {
- if (! _bfd_elf_link_record_dynamic_symbol (info, h->weakdef))
- return false;
- }
- }
-
- return true;
-}
-
-/* This structure is used to pass information to
- elf_link_assign_sym_version. */
-
-struct elf_assign_sym_version_info
-{
- /* Output BFD. */
- bfd *output_bfd;
- /* General link information. */
- struct bfd_link_info *info;
- /* Version tree. */
- struct bfd_elf_version_tree *verdefs;
- /* Whether we had a failure. */
- boolean failed;
-};
-
-/* This structure is used to pass information to
- elf_link_find_version_dependencies. */
-
-struct elf_find_verdep_info
-{
- /* Output BFD. */
- bfd *output_bfd;
- /* General link information. */
- struct bfd_link_info *info;
- /* The number of dependencies. */
- unsigned int vers;
- /* Whether we had a failure. */
- boolean failed;
-};
-
-/* Array used to determine the number of hash table buckets to use
- based on the number of symbols there are. If there are fewer than
- 3 symbols we use 1 bucket, fewer than 17 symbols we use 3 buckets,
- fewer than 37 we use 17 buckets, and so forth. We never use more
- than 32771 buckets. */
-
-static const size_t elf_buckets[] =
-{
- 1, 3, 17, 37, 67, 97, 131, 197, 263, 521, 1031, 2053, 4099, 8209,
- 16411, 32771, 0
-};
-
-/* Compute bucket count for hashing table. We do not use a static set
- of possible tables sizes anymore. Instead we determine for all
- possible reasonable sizes of the table the outcome (i.e., the
- number of collisions etc) and choose the best solution. The
- weighting functions are not too simple to allow the table to grow
- without bounds. Instead one of the weighting factors is the size.
- Therefore the result is always a good payoff between few collisions
- (= short chain lengths) and table size. */
-static size_t
-compute_bucket_count (info)
- struct bfd_link_info *info;
-{
- size_t dynsymcount = elf_hash_table (info)->dynsymcount;
- size_t best_size = 0;
- unsigned long int *hashcodes;
- unsigned long int *hashcodesp;
- unsigned long int i;
- bfd_size_type amt;
-
- /* Compute the hash values for all exported symbols. At the same
- time store the values in an array so that we could use them for
- optimizations. */
- amt = dynsymcount;
- amt *= sizeof (unsigned long int);
- hashcodes = (unsigned long int *) bfd_malloc (amt);
- if (hashcodes == NULL)
- return 0;
- hashcodesp = hashcodes;
-
- /* Put all hash values in HASHCODES. */
- elf_link_hash_traverse (elf_hash_table (info),
- elf_collect_hash_codes, &hashcodesp);
-
-/* We have a problem here. The following code to optimize the table
- size requires an integer type with more the 32 bits. If
- BFD_HOST_U_64_BIT is set we know about such a type. */
-#ifdef BFD_HOST_U_64_BIT
- if (info->optimize == true)
- {
- unsigned long int nsyms = hashcodesp - hashcodes;
- size_t minsize;
- size_t maxsize;
- BFD_HOST_U_64_BIT best_chlen = ~((BFD_HOST_U_64_BIT) 0);
- unsigned long int *counts ;
-
- /* Possible optimization parameters: if we have NSYMS symbols we say
- that the hashing table must at least have NSYMS/4 and at most
- 2*NSYMS buckets. */
- minsize = nsyms / 4;
- if (minsize == 0)
- minsize = 1;
- best_size = maxsize = nsyms * 2;
-
- /* Create array where we count the collisions in. We must use bfd_malloc
- since the size could be large. */
- amt = maxsize;
- amt *= sizeof (unsigned long int);
- counts = (unsigned long int *) bfd_malloc (amt);
- if (counts == NULL)
- {
- free (hashcodes);
- return 0;
- }
-
- /* Compute the "optimal" size for the hash table. The criteria is a
- minimal chain length. The minor criteria is (of course) the size
- of the table. */
- for (i = minsize; i < maxsize; ++i)
- {
- /* Walk through the array of hashcodes and count the collisions. */
- BFD_HOST_U_64_BIT max;
- unsigned long int j;
- unsigned long int fact;
-
- memset (counts, '\0', i * sizeof (unsigned long int));
-
- /* Determine how often each hash bucket is used. */
- for (j = 0; j < nsyms; ++j)
- ++counts[hashcodes[j] % i];
-
- /* For the weight function we need some information about the
- pagesize on the target. This is information need not be 100%
- accurate. Since this information is not available (so far) we
- define it here to a reasonable default value. If it is crucial
- to have a better value some day simply define this value. */
-# ifndef BFD_TARGET_PAGESIZE
-# define BFD_TARGET_PAGESIZE (4096)
-# endif
-
- /* We in any case need 2 + NSYMS entries for the size values and
- the chains. */
- max = (2 + nsyms) * (ARCH_SIZE / 8);
-
-# if 1
- /* Variant 1: optimize for short chains. We add the squares
- of all the chain lengths (which favous many small chain
- over a few long chains). */
- for (j = 0; j < i; ++j)
- max += counts[j] * counts[j];
-
- /* This adds penalties for the overall size of the table. */
- fact = i / (BFD_TARGET_PAGESIZE / (ARCH_SIZE / 8)) + 1;
- max *= fact * fact;
-# else
- /* Variant 2: Optimize a lot more for small table. Here we
- also add squares of the size but we also add penalties for
- empty slots (the +1 term). */
- for (j = 0; j < i; ++j)
- max += (1 + counts[j]) * (1 + counts[j]);
-
- /* The overall size of the table is considered, but not as
- strong as in variant 1, where it is squared. */
- fact = i / (BFD_TARGET_PAGESIZE / (ARCH_SIZE / 8)) + 1;
- max *= fact;
-# endif
-
- /* Compare with current best results. */
- if (max < best_chlen)
- {
- best_chlen = max;
- best_size = i;
- }
- }
-
- free (counts);
- }
- else
-#endif /* defined (BFD_HOST_U_64_BIT) */
- {
- /* This is the fallback solution if no 64bit type is available or if we
- are not supposed to spend much time on optimizations. We select the
- bucket count using a fixed set of numbers. */
- for (i = 0; elf_buckets[i] != 0; i++)
- {
- best_size = elf_buckets[i];
- if (dynsymcount < elf_buckets[i + 1])
- break;
- }
- }
-
- /* Free the arrays we needed. */
- free (hashcodes);
-
- return best_size;
-}
-
-/* Set up the sizes and contents of the ELF dynamic sections. This is
- called by the ELF linker emulation before_allocation routine. We
- must set the sizes of the sections before the linker sets the
- addresses of the various sections. */
-
-boolean
-NAME(bfd_elf,size_dynamic_sections) (output_bfd, soname, rpath,
- filter_shlib,
- auxiliary_filters, info, sinterpptr,
- verdefs)
- bfd *output_bfd;
- const char *soname;
- const char *rpath;
- const char *filter_shlib;
- const char * const *auxiliary_filters;
- struct bfd_link_info *info;
- asection **sinterpptr;
- struct bfd_elf_version_tree *verdefs;
-{
- bfd_size_type soname_indx;
- bfd *dynobj;
- struct elf_backend_data *bed;
- struct elf_assign_sym_version_info asvinfo;
-
- *sinterpptr = NULL;
-
- soname_indx = (bfd_size_type) -1;
-
- if (info->hash->creator->flavour != bfd_target_elf_flavour)
- return true;
-
- if (! is_elf_hash_table (info))
- return false;
-
- /* Any syms created from now on start with -1 in
- got.refcount/offset and plt.refcount/offset. */
- elf_hash_table (info)->init_refcount = -1;
-
- /* The backend may have to create some sections regardless of whether
- we're dynamic or not. */
- bed = get_elf_backend_data (output_bfd);
- if (bed->elf_backend_always_size_sections
- && ! (*bed->elf_backend_always_size_sections) (output_bfd, info))
- return false;
-
- dynobj = elf_hash_table (info)->dynobj;
-
- /* If there were no dynamic objects in the link, there is nothing to
- do here. */
- if (dynobj == NULL)
- return true;
-
- if (! _bfd_elf_maybe_strip_eh_frame_hdr (info))
- return false;
-
- if (elf_hash_table (info)->dynamic_sections_created)
- {
- struct elf_info_failed eif;
- struct elf_link_hash_entry *h;
- asection *dynstr;
-
- *sinterpptr = bfd_get_section_by_name (dynobj, ".interp");
- BFD_ASSERT (*sinterpptr != NULL || info->shared);
-
- if (soname != NULL)
- {
- soname_indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr,
- soname, true);
- if (soname_indx == (bfd_size_type) -1
- || ! elf_add_dynamic_entry (info, (bfd_vma) DT_SONAME,
- soname_indx))
- return false;
- }
-
- if (info->symbolic)
- {
- if (! elf_add_dynamic_entry (info, (bfd_vma) DT_SYMBOLIC,
- (bfd_vma) 0))
- return false;
- info->flags |= DF_SYMBOLIC;
- }
-
- if (rpath != NULL)
- {
- bfd_size_type indx;
-
- indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr, rpath,
- true);
- if (info->new_dtags)
- _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr, indx);
- if (indx == (bfd_size_type) -1
- || ! elf_add_dynamic_entry (info, (bfd_vma) DT_RPATH, indx)
- || (info->new_dtags
- && ! elf_add_dynamic_entry (info, (bfd_vma) DT_RUNPATH,
- indx)))
- return false;
- }
-
- if (filter_shlib != NULL)
- {
- bfd_size_type indx;
-
- indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr,
- filter_shlib, true);
- if (indx == (bfd_size_type) -1
- || ! elf_add_dynamic_entry (info, (bfd_vma) DT_FILTER, indx))
- return false;
- }
-
- if (auxiliary_filters != NULL)
- {
- const char * const *p;
-
- for (p = auxiliary_filters; *p != NULL; p++)
- {
- bfd_size_type indx;
-
- indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr,
- *p, true);
- if (indx == (bfd_size_type) -1
- || ! elf_add_dynamic_entry (info, (bfd_vma) DT_AUXILIARY,
- indx))
- return false;
- }
- }
-
- eif.info = info;
- eif.verdefs = verdefs;
- eif.failed = false;
-
- /* If we are supposed to export all symbols into the dynamic symbol
- table (this is not the normal case), then do so. */
- if (info->export_dynamic)
- {
- elf_link_hash_traverse (elf_hash_table (info), elf_export_symbol,
- (PTR) &eif);
- if (eif.failed)
- return false;
- }
-
- /* Attach all the symbols to their version information. */
- asvinfo.output_bfd = output_bfd;
- asvinfo.info = info;
- asvinfo.verdefs = verdefs;
- asvinfo.failed = false;
-
- elf_link_hash_traverse (elf_hash_table (info),
- elf_link_assign_sym_version,
- (PTR) &asvinfo);
- if (asvinfo.failed)
- return false;
-
- /* Find all symbols which were defined in a dynamic object and make
- the backend pick a reasonable value for them. */
- elf_link_hash_traverse (elf_hash_table (info),
- elf_adjust_dynamic_symbol,
- (PTR) &eif);
- if (eif.failed)
- return false;
-
- /* Add some entries to the .dynamic section. We fill in some of the
- values later, in elf_bfd_final_link, but we must add the entries
- now so that we know the final size of the .dynamic section. */
-
- /* If there are initialization and/or finalization functions to
- call then add the corresponding DT_INIT/DT_FINI entries. */
- h = (info->init_function
- ? elf_link_hash_lookup (elf_hash_table (info),
- info->init_function, false,
- false, false)
- : NULL);
- if (h != NULL
- && (h->elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR
- | ELF_LINK_HASH_DEF_REGULAR)) != 0)
- {
- if (! elf_add_dynamic_entry (info, (bfd_vma) DT_INIT, (bfd_vma) 0))
- return false;
- }
- h = (info->fini_function
- ? elf_link_hash_lookup (elf_hash_table (info),
- info->fini_function, false,
- false, false)
- : NULL);
- if (h != NULL
- && (h->elf_link_hash_flags & (ELF_LINK_HASH_REF_REGULAR
- | ELF_LINK_HASH_DEF_REGULAR)) != 0)
- {
- if (! elf_add_dynamic_entry (info, (bfd_vma) DT_FINI, (bfd_vma) 0))
- return false;
- }
-
- if (bfd_get_section_by_name (output_bfd, ".preinit_array") != NULL)
- {
- /* DT_PREINIT_ARRAY is not allowed in shared library. */
- if (info->shared)
- {
- bfd *sub;
- asection *o;
-
- for (sub = info->input_bfds; sub != NULL;
- sub = sub->link_next)
- for (o = sub->sections; o != NULL; o = o->next)
- if (elf_section_data (o)->this_hdr.sh_type
- == SHT_PREINIT_ARRAY)
- {
- (*_bfd_error_handler)
- (_("%s: .preinit_array section is not allowed in DSO"),
- bfd_archive_filename (sub));
- break;
- }
-
- bfd_set_error (bfd_error_nonrepresentable_section);
- return false;
- }
-
- if (!elf_add_dynamic_entry (info, (bfd_vma) DT_PREINIT_ARRAY,
- (bfd_vma) 0)
- || !elf_add_dynamic_entry (info, (bfd_vma) DT_PREINIT_ARRAYSZ,
- (bfd_vma) 0))
- return false;
- }
- if (bfd_get_section_by_name (output_bfd, ".init_array") != NULL)
- {
- if (!elf_add_dynamic_entry (info, (bfd_vma) DT_INIT_ARRAY,
- (bfd_vma) 0)
- || !elf_add_dynamic_entry (info, (bfd_vma) DT_INIT_ARRAYSZ,
- (bfd_vma) 0))
- return false;
- }
- if (bfd_get_section_by_name (output_bfd, ".fini_array") != NULL)
- {
- if (!elf_add_dynamic_entry (info, (bfd_vma) DT_FINI_ARRAY,
- (bfd_vma) 0)
- || !elf_add_dynamic_entry (info, (bfd_vma) DT_FINI_ARRAYSZ,
- (bfd_vma) 0))
- return false;
- }
-
- dynstr = bfd_get_section_by_name (dynobj, ".dynstr");
- /* If .dynstr is excluded from the link, we don't want any of
- these tags. Strictly, we should be checking each section
- individually; This quick check covers for the case where
- someone does a /DISCARD/ : { *(*) }. */
- if (dynstr != NULL && dynstr->output_section != bfd_abs_section_ptr)
- {
- bfd_size_type strsize;
-
- strsize = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr);
- if (! elf_add_dynamic_entry (info, (bfd_vma) DT_HASH, (bfd_vma) 0)
- || ! elf_add_dynamic_entry (info, (bfd_vma) DT_STRTAB, (bfd_vma) 0)
- || ! elf_add_dynamic_entry (info, (bfd_vma) DT_SYMTAB, (bfd_vma) 0)
- || ! elf_add_dynamic_entry (info, (bfd_vma) DT_STRSZ, strsize)
- || ! elf_add_dynamic_entry (info, (bfd_vma) DT_SYMENT,
- (bfd_vma) sizeof (Elf_External_Sym)))
- return false;
- }
- }
-
- /* The backend must work out the sizes of all the other dynamic
- sections. */
- if (bed->elf_backend_size_dynamic_sections
- && ! (*bed->elf_backend_size_dynamic_sections) (output_bfd, info))
- return false;
-
- if (elf_hash_table (info)->dynamic_sections_created)
- {
- bfd_size_type dynsymcount;
- asection *s;
- size_t bucketcount = 0;
- size_t hash_entry_size;
- unsigned int dtagcount;
-
- /* Set up the version definition section. */
- s = bfd_get_section_by_name (dynobj, ".gnu.version_d");
- BFD_ASSERT (s != NULL);
-
- /* We may have created additional version definitions if we are
- just linking a regular application. */
- verdefs = asvinfo.verdefs;
-
- /* Skip anonymous version tag. */
- if (verdefs != NULL && verdefs->vernum == 0)
- verdefs = verdefs->next;
-
- if (verdefs == NULL)
- _bfd_strip_section_from_output (info, s);
- else
- {
- unsigned int cdefs;
- bfd_size_type size;
- struct bfd_elf_version_tree *t;
- bfd_byte *p;
- Elf_Internal_Verdef def;
- Elf_Internal_Verdaux defaux;
-
- cdefs = 0;
- size = 0;
-
- /* Make space for the base version. */
- size += sizeof (Elf_External_Verdef);
- size += sizeof (Elf_External_Verdaux);
- ++cdefs;
-
- for (t = verdefs; t != NULL; t = t->next)
- {
- struct bfd_elf_version_deps *n;
-
- size += sizeof (Elf_External_Verdef);
- size += sizeof (Elf_External_Verdaux);
- ++cdefs;
-
- for (n = t->deps; n != NULL; n = n->next)
- size += sizeof (Elf_External_Verdaux);
- }
-
- s->_raw_size = size;
- s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size);
- if (s->contents == NULL && s->_raw_size != 0)
- return false;
-
- /* Fill in the version definition section. */
-
- p = s->contents;
-
- def.vd_version = VER_DEF_CURRENT;
- def.vd_flags = VER_FLG_BASE;
- def.vd_ndx = 1;
- def.vd_cnt = 1;
- def.vd_aux = sizeof (Elf_External_Verdef);
- def.vd_next = (sizeof (Elf_External_Verdef)
- + sizeof (Elf_External_Verdaux));
-
- if (soname_indx != (bfd_size_type) -1)
- {
- _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr,
- soname_indx);
- def.vd_hash = bfd_elf_hash (soname);
- defaux.vda_name = soname_indx;
- }
- else
- {
- const char *name;
- bfd_size_type indx;
-
- name = basename (output_bfd->filename);
- def.vd_hash = bfd_elf_hash (name);
- indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr,
- name, false);
- if (indx == (bfd_size_type) -1)
- return false;
- defaux.vda_name = indx;
- }
- defaux.vda_next = 0;
-
- _bfd_elf_swap_verdef_out (output_bfd, &def,
- (Elf_External_Verdef *) p);
- p += sizeof (Elf_External_Verdef);
- _bfd_elf_swap_verdaux_out (output_bfd, &defaux,
- (Elf_External_Verdaux *) p);
- p += sizeof (Elf_External_Verdaux);
-
- for (t = verdefs; t != NULL; t = t->next)
- {
- unsigned int cdeps;
- struct bfd_elf_version_deps *n;
- struct elf_link_hash_entry *h;
-
- cdeps = 0;
- for (n = t->deps; n != NULL; n = n->next)
- ++cdeps;
-
- /* Add a symbol representing this version. */
- h = NULL;
- if (! (_bfd_generic_link_add_one_symbol
- (info, dynobj, t->name, BSF_GLOBAL, bfd_abs_section_ptr,
- (bfd_vma) 0, (const char *) NULL, false,
- get_elf_backend_data (dynobj)->collect,
- (struct bfd_link_hash_entry **) &h)))
- return false;
- h->elf_link_hash_flags &= ~ ELF_LINK_NON_ELF;
- h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
- h->type = STT_OBJECT;
- h->verinfo.vertree = t;
-
- if (! _bfd_elf_link_record_dynamic_symbol (info, h))
- return false;
-
- def.vd_version = VER_DEF_CURRENT;
- def.vd_flags = 0;
- if (t->globals == NULL && t->locals == NULL && ! t->used)
- def.vd_flags |= VER_FLG_WEAK;
- def.vd_ndx = t->vernum + 1;
- def.vd_cnt = cdeps + 1;
- def.vd_hash = bfd_elf_hash (t->name);
- def.vd_aux = sizeof (Elf_External_Verdef);
- if (t->next != NULL)
- def.vd_next = (sizeof (Elf_External_Verdef)
- + (cdeps + 1) * sizeof (Elf_External_Verdaux));
- else
- def.vd_next = 0;
-
- _bfd_elf_swap_verdef_out (output_bfd, &def,
- (Elf_External_Verdef *) p);
- p += sizeof (Elf_External_Verdef);
-
- defaux.vda_name = h->dynstr_index;
- _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr,
- h->dynstr_index);
- if (t->deps == NULL)
- defaux.vda_next = 0;
- else
- defaux.vda_next = sizeof (Elf_External_Verdaux);
- t->name_indx = defaux.vda_name;
-
- _bfd_elf_swap_verdaux_out (output_bfd, &defaux,
- (Elf_External_Verdaux *) p);
- p += sizeof (Elf_External_Verdaux);
-
- for (n = t->deps; n != NULL; n = n->next)
- {
- if (n->version_needed == NULL)
- {
- /* This can happen if there was an error in the
- version script. */
- defaux.vda_name = 0;
- }
- else
- {
- defaux.vda_name = n->version_needed->name_indx;
- _bfd_elf_strtab_addref (elf_hash_table (info)->dynstr,
- defaux.vda_name);
- }
- if (n->next == NULL)
- defaux.vda_next = 0;
- else
- defaux.vda_next = sizeof (Elf_External_Verdaux);
-
- _bfd_elf_swap_verdaux_out (output_bfd, &defaux,
- (Elf_External_Verdaux *) p);
- p += sizeof (Elf_External_Verdaux);
- }
- }
-
- if (! elf_add_dynamic_entry (info, (bfd_vma) DT_VERDEF, (bfd_vma) 0)
- || ! elf_add_dynamic_entry (info, (bfd_vma) DT_VERDEFNUM,
- (bfd_vma) cdefs))
- return false;
-
- elf_tdata (output_bfd)->cverdefs = cdefs;
- }
-
- if (info->new_dtags && info->flags)
- {
- if (! elf_add_dynamic_entry (info, (bfd_vma) DT_FLAGS, info->flags))
- return false;
- }
-
- if (info->flags_1)
- {
- if (! info->shared)
- info->flags_1 &= ~ (DF_1_INITFIRST
- | DF_1_NODELETE
- | DF_1_NOOPEN);
- if (! elf_add_dynamic_entry (info, (bfd_vma) DT_FLAGS_1,
- info->flags_1))
- return false;
- }
-
- /* Work out the size of the version reference section. */
-
- s = bfd_get_section_by_name (dynobj, ".gnu.version_r");
- BFD_ASSERT (s != NULL);
- {
- struct elf_find_verdep_info sinfo;
-
- sinfo.output_bfd = output_bfd;
- sinfo.info = info;
- sinfo.vers = elf_tdata (output_bfd)->cverdefs;
- if (sinfo.vers == 0)
- sinfo.vers = 1;
- sinfo.failed = false;
-
- elf_link_hash_traverse (elf_hash_table (info),
- elf_link_find_version_dependencies,
- (PTR) &sinfo);
-
- if (elf_tdata (output_bfd)->verref == NULL)
- _bfd_strip_section_from_output (info, s);
- else
- {
- Elf_Internal_Verneed *t;
- unsigned int size;
- unsigned int crefs;
- bfd_byte *p;
-
- /* Build the version definition section. */
- size = 0;
- crefs = 0;
- for (t = elf_tdata (output_bfd)->verref;
- t != NULL;
- t = t->vn_nextref)
- {
- Elf_Internal_Vernaux *a;
-
- size += sizeof (Elf_External_Verneed);
- ++crefs;
- for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
- size += sizeof (Elf_External_Vernaux);
- }
-
- s->_raw_size = size;
- s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size);
- if (s->contents == NULL)
- return false;
-
- p = s->contents;
- for (t = elf_tdata (output_bfd)->verref;
- t != NULL;
- t = t->vn_nextref)
- {
- unsigned int caux;
- Elf_Internal_Vernaux *a;
- bfd_size_type indx;
-
- caux = 0;
- for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
- ++caux;
-
- t->vn_version = VER_NEED_CURRENT;
- t->vn_cnt = caux;
- indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr,
- elf_dt_name (t->vn_bfd) != NULL
- ? elf_dt_name (t->vn_bfd)
- : basename (t->vn_bfd->filename),
- false);
- if (indx == (bfd_size_type) -1)
- return false;
- t->vn_file = indx;
- t->vn_aux = sizeof (Elf_External_Verneed);
- if (t->vn_nextref == NULL)
- t->vn_next = 0;
- else
- t->vn_next = (sizeof (Elf_External_Verneed)
- + caux * sizeof (Elf_External_Vernaux));
-
- _bfd_elf_swap_verneed_out (output_bfd, t,
- (Elf_External_Verneed *) p);
- p += sizeof (Elf_External_Verneed);
-
- for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
- {
- a->vna_hash = bfd_elf_hash (a->vna_nodename);
- indx = _bfd_elf_strtab_add (elf_hash_table (info)->dynstr,
- a->vna_nodename, false);
- if (indx == (bfd_size_type) -1)
- return false;
- a->vna_name = indx;
- if (a->vna_nextptr == NULL)
- a->vna_next = 0;
- else
- a->vna_next = sizeof (Elf_External_Vernaux);
-
- _bfd_elf_swap_vernaux_out (output_bfd, a,
- (Elf_External_Vernaux *) p);
- p += sizeof (Elf_External_Vernaux);
- }
- }
-
- if (! elf_add_dynamic_entry (info, (bfd_vma) DT_VERNEED,
- (bfd_vma) 0)
- || ! elf_add_dynamic_entry (info, (bfd_vma) DT_VERNEEDNUM,
- (bfd_vma) crefs))
- return false;
-
- elf_tdata (output_bfd)->cverrefs = crefs;
- }
- }
-
- /* Assign dynsym indicies. In a shared library we generate a
- section symbol for each output section, which come first.
- Next come all of the back-end allocated local dynamic syms,
- followed by the rest of the global symbols. */
-
- dynsymcount = _bfd_elf_link_renumber_dynsyms (output_bfd, info);
-
- /* Work out the size of the symbol version section. */
- s = bfd_get_section_by_name (dynobj, ".gnu.version");
- BFD_ASSERT (s != NULL);
- if (dynsymcount == 0
- || (verdefs == NULL && elf_tdata (output_bfd)->verref == NULL))
- {
- _bfd_strip_section_from_output (info, s);
- /* The DYNSYMCOUNT might have changed if we were going to
- output a dynamic symbol table entry for S. */
- dynsymcount = _bfd_elf_link_renumber_dynsyms (output_bfd, info);
- }
- else
- {
- s->_raw_size = dynsymcount * sizeof (Elf_External_Versym);
- s->contents = (bfd_byte *) bfd_zalloc (output_bfd, s->_raw_size);
- if (s->contents == NULL)
- return false;
-
- if (! elf_add_dynamic_entry (info, (bfd_vma) DT_VERSYM, (bfd_vma) 0))
- return false;
- }
-
- /* Set the size of the .dynsym and .hash sections. We counted
- the number of dynamic symbols in elf_link_add_object_symbols.
- We will build the contents of .dynsym and .hash when we build
- the final symbol table, because until then we do not know the
- correct value to give the symbols. We built the .dynstr
- section as we went along in elf_link_add_object_symbols. */
- s = bfd_get_section_by_name (dynobj, ".dynsym");
- BFD_ASSERT (s != NULL);
- s->_raw_size = dynsymcount * sizeof (Elf_External_Sym);
- s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size);
- if (s->contents == NULL && s->_raw_size != 0)
- return false;
-
- if (dynsymcount != 0)
- {
- Elf_Internal_Sym isym;
-
- /* The first entry in .dynsym is a dummy symbol. */
- isym.st_value = 0;
- isym.st_size = 0;
- isym.st_name = 0;
- isym.st_info = 0;
- isym.st_other = 0;
- isym.st_shndx = 0;
- elf_swap_symbol_out (output_bfd, &isym, (PTR) s->contents, (PTR) 0);
- }
-
- /* Compute the size of the hashing table. As a side effect this
- computes the hash values for all the names we export. */
- bucketcount = compute_bucket_count (info);
-
- s = bfd_get_section_by_name (dynobj, ".hash");
- BFD_ASSERT (s != NULL);
- hash_entry_size = elf_section_data (s)->this_hdr.sh_entsize;
- s->_raw_size = ((2 + bucketcount + dynsymcount) * hash_entry_size);
- s->contents = (bfd_byte *) bfd_alloc (output_bfd, s->_raw_size);
- if (s->contents == NULL)
- return false;
- memset (s->contents, 0, (size_t) s->_raw_size);
-
- bfd_put (8 * hash_entry_size, output_bfd, (bfd_vma) bucketcount,
- s->contents);
- bfd_put (8 * hash_entry_size, output_bfd, (bfd_vma) dynsymcount,
- s->contents + hash_entry_size);
-
- elf_hash_table (info)->bucketcount = bucketcount;
-
- s = bfd_get_section_by_name (dynobj, ".dynstr");
- BFD_ASSERT (s != NULL);
-
- elf_finalize_dynstr (output_bfd, info);
-
- s->_raw_size = _bfd_elf_strtab_size (elf_hash_table (info)->dynstr);
-
- for (dtagcount = 0; dtagcount <= info->spare_dynamic_tags; ++dtagcount)
- if (! elf_add_dynamic_entry (info, (bfd_vma) DT_NULL, (bfd_vma) 0))
- return false;
- }
-
- return true;
-}
-
-/* This function is used to adjust offsets into .dynstr for
- dynamic symbols. This is called via elf_link_hash_traverse. */
-
-static boolean elf_adjust_dynstr_offsets
-PARAMS ((struct elf_link_hash_entry *, PTR));
-
-static boolean
-elf_adjust_dynstr_offsets (h, data)
- struct elf_link_hash_entry *h;
- PTR data;
-{
- struct elf_strtab_hash *dynstr = (struct elf_strtab_hash *) data;
-
- if (h->root.type == bfd_link_hash_warning)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
-
- if (h->dynindx != -1)
- h->dynstr_index = _bfd_elf_strtab_offset (dynstr, h->dynstr_index);
- return true;
-}
-
-/* Assign string offsets in .dynstr, update all structures referencing
- them. */
-
-static boolean
-elf_finalize_dynstr (output_bfd, info)
- bfd *output_bfd;
- struct bfd_link_info *info;
-{
- struct elf_link_local_dynamic_entry *entry;
- struct elf_strtab_hash *dynstr = elf_hash_table (info)->dynstr;
- bfd *dynobj = elf_hash_table (info)->dynobj;
- asection *sdyn;
- bfd_size_type size;
- Elf_External_Dyn *dyncon, *dynconend;
-
- _bfd_elf_strtab_finalize (dynstr);
- size = _bfd_elf_strtab_size (dynstr);
-
- /* Update all .dynamic entries referencing .dynstr strings. */
- sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
- BFD_ASSERT (sdyn != NULL);
-
- dyncon = (Elf_External_Dyn *) sdyn->contents;
- dynconend = (Elf_External_Dyn *) (sdyn->contents +
- sdyn->_raw_size);
- for (; dyncon < dynconend; dyncon++)
- {
- Elf_Internal_Dyn dyn;
-
- elf_swap_dyn_in (dynobj, dyncon, & dyn);
- switch (dyn.d_tag)
- {
- case DT_STRSZ:
- dyn.d_un.d_val = size;
- elf_swap_dyn_out (dynobj, & dyn, dyncon);
- break;
- case DT_NEEDED:
- case DT_SONAME:
- case DT_RPATH:
- case DT_RUNPATH:
- case DT_FILTER:
- case DT_AUXILIARY:
- dyn.d_un.d_val = _bfd_elf_strtab_offset (dynstr, dyn.d_un.d_val);
- elf_swap_dyn_out (dynobj, & dyn, dyncon);
- break;
- default:
- break;
- }
- }
-
- /* Now update local dynamic symbols. */
- for (entry = elf_hash_table (info)->dynlocal; entry ; entry = entry->next)
- entry->isym.st_name = _bfd_elf_strtab_offset (dynstr,
- entry->isym.st_name);
-
- /* And the rest of dynamic symbols. */
- elf_link_hash_traverse (elf_hash_table (info),
- elf_adjust_dynstr_offsets, dynstr);
-
- /* Adjust version definitions. */
- if (elf_tdata (output_bfd)->cverdefs)
- {
- asection *s;
- bfd_byte *p;
- bfd_size_type i;
- Elf_Internal_Verdef def;
- Elf_Internal_Verdaux defaux;
-
- s = bfd_get_section_by_name (dynobj, ".gnu.version_d");
- p = (bfd_byte *) s->contents;
- do
- {
- _bfd_elf_swap_verdef_in (output_bfd, (Elf_External_Verdef *) p,
- &def);
- p += sizeof (Elf_External_Verdef);
- for (i = 0; i < def.vd_cnt; ++i)
- {
- _bfd_elf_swap_verdaux_in (output_bfd,
- (Elf_External_Verdaux *) p, &defaux);
- defaux.vda_name = _bfd_elf_strtab_offset (dynstr,
- defaux.vda_name);
- _bfd_elf_swap_verdaux_out (output_bfd,
- &defaux, (Elf_External_Verdaux *) p);
- p += sizeof (Elf_External_Verdaux);
- }
- }
- while (def.vd_next);
- }
-
- /* Adjust version references. */
- if (elf_tdata (output_bfd)->verref)
- {
- asection *s;
- bfd_byte *p;
- bfd_size_type i;
- Elf_Internal_Verneed need;
- Elf_Internal_Vernaux needaux;
-
- s = bfd_get_section_by_name (dynobj, ".gnu.version_r");
- p = (bfd_byte *) s->contents;
- do
- {
- _bfd_elf_swap_verneed_in (output_bfd, (Elf_External_Verneed *) p,
- &need);
- need.vn_file = _bfd_elf_strtab_offset (dynstr, need.vn_file);
- _bfd_elf_swap_verneed_out (output_bfd, &need,
- (Elf_External_Verneed *) p);
- p += sizeof (Elf_External_Verneed);
- for (i = 0; i < need.vn_cnt; ++i)
- {
- _bfd_elf_swap_vernaux_in (output_bfd,
- (Elf_External_Vernaux *) p, &needaux);
- needaux.vna_name = _bfd_elf_strtab_offset (dynstr,
- needaux.vna_name);
- _bfd_elf_swap_vernaux_out (output_bfd,
- &needaux,
- (Elf_External_Vernaux *) p);
- p += sizeof (Elf_External_Vernaux);
- }
- }
- while (need.vn_next);
- }
-
- return true;
-}
-
-/* Fix up the flags for a symbol. This handles various cases which
- can only be fixed after all the input files are seen. This is
- currently called by both adjust_dynamic_symbol and
- assign_sym_version, which is unnecessary but perhaps more robust in
- the face of future changes. */
-
-static boolean
-elf_fix_symbol_flags (h, eif)
- struct elf_link_hash_entry *h;
- struct elf_info_failed *eif;
-{
- /* If this symbol was mentioned in a non-ELF file, try to set
- DEF_REGULAR and REF_REGULAR correctly. This is the only way to
- permit a non-ELF file to correctly refer to a symbol defined in
- an ELF dynamic object. */
- if ((h->elf_link_hash_flags & ELF_LINK_NON_ELF) != 0)
- {
- while (h->root.type == bfd_link_hash_indirect)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
-
- if (h->root.type != bfd_link_hash_defined
- && h->root.type != bfd_link_hash_defweak)
- h->elf_link_hash_flags |= (ELF_LINK_HASH_REF_REGULAR
- | ELF_LINK_HASH_REF_REGULAR_NONWEAK);
- else
- {
- if (h->root.u.def.section->owner != NULL
- && (bfd_get_flavour (h->root.u.def.section->owner)
- == bfd_target_elf_flavour))
- h->elf_link_hash_flags |= (ELF_LINK_HASH_REF_REGULAR
- | ELF_LINK_HASH_REF_REGULAR_NONWEAK);
- else
- h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
- }
-
- if (h->dynindx == -1
- && ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
- || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0))
- {
- if (! _bfd_elf_link_record_dynamic_symbol (eif->info, h))
- {
- eif->failed = true;
- return false;
- }
- }
- }
- else
- {
- /* Unfortunately, ELF_LINK_NON_ELF is only correct if the symbol
- was first seen in a non-ELF file. Fortunately, if the symbol
- was first seen in an ELF file, we're probably OK unless the
- symbol was defined in a non-ELF file. Catch that case here.
- FIXME: We're still in trouble if the symbol was first seen in
- a dynamic object, and then later in a non-ELF regular object. */
- if ((h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
- && (h->root.u.def.section->owner != NULL
- ? (bfd_get_flavour (h->root.u.def.section->owner)
- != bfd_target_elf_flavour)
- : (bfd_is_abs_section (h->root.u.def.section)
- && (h->elf_link_hash_flags
- & ELF_LINK_HASH_DEF_DYNAMIC) == 0)))
- h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
- }
-
- /* If this is a final link, and the symbol was defined as a common
- symbol in a regular object file, and there was no definition in
- any dynamic object, then the linker will have allocated space for
- the symbol in a common section but the ELF_LINK_HASH_DEF_REGULAR
- flag will not have been set. */
- if (h->root.type == bfd_link_hash_defined
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
- && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) != 0
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
- && (h->root.u.def.section->owner->flags & DYNAMIC) == 0)
- h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
-
- /* If -Bsymbolic was used (which means to bind references to global
- symbols to the definition within the shared object), and this
- symbol was defined in a regular object, then it actually doesn't
- need a PLT entry, and we can accomplish that by forcing it local.
- Likewise, if the symbol has hidden or internal visibility.
- FIXME: It might be that we also do not need a PLT for other
- non-hidden visibilities, but we would have to tell that to the
- backend specifically; we can't just clear PLT-related data here. */
- if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0
- && eif->info->shared
- && is_elf_hash_table (eif->info)
- && (eif->info->symbolic
- || ELF_ST_VISIBILITY (h->other) == STV_INTERNAL
- || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN)
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0)
- {
- struct elf_backend_data *bed;
- boolean force_local;
-
- bed = get_elf_backend_data (elf_hash_table (eif->info)->dynobj);
-
- force_local = (ELF_ST_VISIBILITY (h->other) == STV_INTERNAL
- || ELF_ST_VISIBILITY (h->other) == STV_HIDDEN);
- (*bed->elf_backend_hide_symbol) (eif->info, h, force_local);
- }
-
- /* If this is a weak defined symbol in a dynamic object, and we know
- the real definition in the dynamic object, copy interesting flags
- over to the real definition. */
- if (h->weakdef != NULL)
- {
- struct elf_link_hash_entry *weakdef;
-
- BFD_ASSERT (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak);
- weakdef = h->weakdef;
- BFD_ASSERT (weakdef->root.type == bfd_link_hash_defined
- || weakdef->root.type == bfd_link_hash_defweak);
- BFD_ASSERT (weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC);
-
- /* If the real definition is defined by a regular object file,
- don't do anything special. See the longer description in
- elf_adjust_dynamic_symbol, below. */
- if ((weakdef->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0)
- h->weakdef = NULL;
- else
- {
- struct elf_backend_data *bed;
-
- bed = get_elf_backend_data (elf_hash_table (eif->info)->dynobj);
- (*bed->elf_backend_copy_indirect_symbol) (weakdef, h);
- }
- }
-
- return true;
-}
-
-/* Make the backend pick a good value for a dynamic symbol. This is
- called via elf_link_hash_traverse, and also calls itself
- recursively. */
-
-static boolean
-elf_adjust_dynamic_symbol (h, data)
- struct elf_link_hash_entry *h;
- PTR data;
-{
- struct elf_info_failed *eif = (struct elf_info_failed *) data;
- bfd *dynobj;
- struct elf_backend_data *bed;
-
- if (h->root.type == bfd_link_hash_warning)
- {
- h->plt.offset = (bfd_vma) -1;
- h->got.offset = (bfd_vma) -1;
-
- /* When warning symbols are created, they **replace** the "real"
- entry in the hash table, thus we never get to see the real
- symbol in a hash traversal. So look at it now. */
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
- }
-
- /* Ignore indirect symbols. These are added by the versioning code. */
- if (h->root.type == bfd_link_hash_indirect)
- return true;
-
- if (! is_elf_hash_table (eif->info))
- return false;
-
- /* Fix the symbol flags. */
- if (! elf_fix_symbol_flags (h, eif))
- return false;
-
- /* If this symbol does not require a PLT entry, and it is not
- defined by a dynamic object, or is not referenced by a regular
- object, ignore it. We do have to handle a weak defined symbol,
- even if no regular object refers to it, if we decided to add it
- to the dynamic symbol table. FIXME: Do we normally need to worry
- about symbols which are defined by one dynamic object and
- referenced by another one? */
- if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) == 0
- && ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
- || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
- || ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0
- && (h->weakdef == NULL || h->weakdef->dynindx == -1))))
- {
- h->plt.offset = (bfd_vma) -1;
- return true;
- }
-
- /* If we've already adjusted this symbol, don't do it again. This
- can happen via a recursive call. */
- if ((h->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
- return true;
-
- /* Don't look at this symbol again. Note that we must set this
- after checking the above conditions, because we may look at a
- symbol once, decide not to do anything, and then get called
- recursively later after REF_REGULAR is set below. */
- h->elf_link_hash_flags |= ELF_LINK_HASH_DYNAMIC_ADJUSTED;
-
- /* If this is a weak definition, and we know a real definition, and
- the real symbol is not itself defined by a regular object file,
- then get a good value for the real definition. We handle the
- real symbol first, for the convenience of the backend routine.
-
- Note that there is a confusing case here. If the real definition
- is defined by a regular object file, we don't get the real symbol
- from the dynamic object, but we do get the weak symbol. If the
- processor backend uses a COPY reloc, then if some routine in the
- dynamic object changes the real symbol, we will not see that
- change in the corresponding weak symbol. This is the way other
- ELF linkers work as well, and seems to be a result of the shared
- library model.
-
- I will clarify this issue. Most SVR4 shared libraries define the
- variable _timezone and define timezone as a weak synonym. The
- tzset call changes _timezone. If you write
- extern int timezone;
- int _timezone = 5;
- int main () { tzset (); printf ("%d %d\n", timezone, _timezone); }
- you might expect that, since timezone is a synonym for _timezone,
- the same number will print both times. However, if the processor
- backend uses a COPY reloc, then actually timezone will be copied
- into your process image, and, since you define _timezone
- yourself, _timezone will not. Thus timezone and _timezone will
- wind up at different memory locations. The tzset call will set
- _timezone, leaving timezone unchanged. */
-
- if (h->weakdef != NULL)
- {
- /* If we get to this point, we know there is an implicit
- reference by a regular object file via the weak symbol H.
- FIXME: Is this really true? What if the traversal finds
- H->WEAKDEF before it finds H? */
- h->weakdef->elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR;
-
- if (! elf_adjust_dynamic_symbol (h->weakdef, (PTR) eif))
- return false;
- }
-
- /* If a symbol has no type and no size and does not require a PLT
- entry, then we are probably about to do the wrong thing here: we
- are probably going to create a COPY reloc for an empty object.
- This case can arise when a shared object is built with assembly
- code, and the assembly code fails to set the symbol type. */
- if (h->size == 0
- && h->type == STT_NOTYPE
- && (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) == 0)
- (*_bfd_error_handler)
- (_("warning: type and size of dynamic symbol `%s' are not defined"),
- h->root.root.string);
-
- dynobj = elf_hash_table (eif->info)->dynobj;
- bed = get_elf_backend_data (dynobj);
- if (! (*bed->elf_backend_adjust_dynamic_symbol) (eif->info, h))
- {
- eif->failed = true;
- return false;
- }
-
- return true;
-}
-
-/* This routine is used to export all defined symbols into the dynamic
- symbol table. It is called via elf_link_hash_traverse. */
-
-static boolean
-elf_export_symbol (h, data)
- struct elf_link_hash_entry *h;
- PTR data;
-{
- struct elf_info_failed *eif = (struct elf_info_failed *) data;
-
- /* Ignore indirect symbols. These are added by the versioning code. */
- if (h->root.type == bfd_link_hash_indirect)
- return true;
-
- if (h->root.type == bfd_link_hash_warning)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
-
- if (h->dynindx == -1
- && (h->elf_link_hash_flags
- & (ELF_LINK_HASH_DEF_REGULAR | ELF_LINK_HASH_REF_REGULAR)) != 0)
- {
- struct bfd_elf_version_tree *t;
- struct bfd_elf_version_expr *d;
-
- for (t = eif->verdefs; t != NULL; t = t->next)
- {
- if (t->globals != NULL)
- {
- for (d = t->globals; d != NULL; d = d->next)
- {
- if ((*d->match) (d, h->root.root.string))
- goto doit;
- }
- }
-
- if (t->locals != NULL)
- {
- for (d = t->locals ; d != NULL; d = d->next)
- {
- if ((*d->match) (d, h->root.root.string))
- return true;
- }
- }
- }
-
- if (!eif->verdefs)
- {
-doit:
- if (! _bfd_elf_link_record_dynamic_symbol (eif->info, h))
- {
- eif->failed = true;
- return false;
- }
- }
- }
-
- return true;
-}
-
-/* Look through the symbols which are defined in other shared
- libraries and referenced here. Update the list of version
- dependencies. This will be put into the .gnu.version_r section.
- This function is called via elf_link_hash_traverse. */
-
-static boolean
-elf_link_find_version_dependencies (h, data)
- struct elf_link_hash_entry *h;
- PTR data;
-{
- struct elf_find_verdep_info *rinfo = (struct elf_find_verdep_info *) data;
- Elf_Internal_Verneed *t;
- Elf_Internal_Vernaux *a;
- bfd_size_type amt;
-
- if (h->root.type == bfd_link_hash_warning)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
-
- /* We only care about symbols defined in shared objects with version
- information. */
- if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
- || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
- || h->dynindx == -1
- || h->verinfo.verdef == NULL)
- return true;
-
- /* See if we already know about this version. */
- for (t = elf_tdata (rinfo->output_bfd)->verref; t != NULL; t = t->vn_nextref)
- {
- if (t->vn_bfd != h->verinfo.verdef->vd_bfd)
- continue;
-
- for (a = t->vn_auxptr; a != NULL; a = a->vna_nextptr)
- if (a->vna_nodename == h->verinfo.verdef->vd_nodename)
- return true;
-
- break;
- }
-
- /* This is a new version. Add it to tree we are building. */
-
- if (t == NULL)
- {
- amt = sizeof *t;
- t = (Elf_Internal_Verneed *) bfd_zalloc (rinfo->output_bfd, amt);
- if (t == NULL)
- {
- rinfo->failed = true;
- return false;
- }
-
- t->vn_bfd = h->verinfo.verdef->vd_bfd;
- t->vn_nextref = elf_tdata (rinfo->output_bfd)->verref;
- elf_tdata (rinfo->output_bfd)->verref = t;
- }
-
- amt = sizeof *a;
- a = (Elf_Internal_Vernaux *) bfd_zalloc (rinfo->output_bfd, amt);
-
- /* Note that we are copying a string pointer here, and testing it
- above. If bfd_elf_string_from_elf_section is ever changed to
- discard the string data when low in memory, this will have to be
- fixed. */
- a->vna_nodename = h->verinfo.verdef->vd_nodename;
-
- a->vna_flags = h->verinfo.verdef->vd_flags;
- a->vna_nextptr = t->vn_auxptr;
-
- h->verinfo.verdef->vd_exp_refno = rinfo->vers;
- ++rinfo->vers;
-
- a->vna_other = h->verinfo.verdef->vd_exp_refno + 1;
-
- t->vn_auxptr = a;
-
- return true;
-}
-
-/* Figure out appropriate versions for all the symbols. We may not
- have the version number script until we have read all of the input
- files, so until that point we don't know which symbols should be
- local. This function is called via elf_link_hash_traverse. */
-
-static boolean
-elf_link_assign_sym_version (h, data)
- struct elf_link_hash_entry *h;
- PTR data;
-{
- struct elf_assign_sym_version_info *sinfo;
- struct bfd_link_info *info;
- struct elf_backend_data *bed;
- struct elf_info_failed eif;
- char *p;
- bfd_size_type amt;
-
- sinfo = (struct elf_assign_sym_version_info *) data;
- info = sinfo->info;
-
- if (h->root.type == bfd_link_hash_warning)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
-
- /* Fix the symbol flags. */
- eif.failed = false;
- eif.info = info;
- if (! elf_fix_symbol_flags (h, &eif))
- {
- if (eif.failed)
- sinfo->failed = true;
- return false;
- }
-
- /* We only need version numbers for symbols defined in regular
- objects. */
- if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
- return true;
-
- bed = get_elf_backend_data (sinfo->output_bfd);
- p = strchr (h->root.root.string, ELF_VER_CHR);
- if (p != NULL && h->verinfo.vertree == NULL)
- {
- struct bfd_elf_version_tree *t;
- boolean hidden;
-
- hidden = true;
-
- /* There are two consecutive ELF_VER_CHR characters if this is
- not a hidden symbol. */
- ++p;
- if (*p == ELF_VER_CHR)
- {
- hidden = false;
- ++p;
- }
-
- /* If there is no version string, we can just return out. */
- if (*p == '\0')
- {
- if (hidden)
- h->elf_link_hash_flags |= ELF_LINK_HIDDEN;
- return true;
- }
-
- /* Look for the version. If we find it, it is no longer weak. */
- for (t = sinfo->verdefs; t != NULL; t = t->next)
- {
- if (strcmp (t->name, p) == 0)
- {
- size_t len;
- char *alc;
- struct bfd_elf_version_expr *d;
-
- len = p - h->root.root.string;
- alc = bfd_malloc ((bfd_size_type) len);
- if (alc == NULL)
- return false;
- strncpy (alc, h->root.root.string, len - 1);
- alc[len - 1] = '\0';
- if (alc[len - 2] == ELF_VER_CHR)
- alc[len - 2] = '\0';
-
- h->verinfo.vertree = t;
- t->used = true;
- d = NULL;
-
- if (t->globals != NULL)
- {
- for (d = t->globals; d != NULL; d = d->next)
- if ((*d->match) (d, alc))
- break;
- }
-
- /* See if there is anything to force this symbol to
- local scope. */
- if (d == NULL && t->locals != NULL)
- {
- for (d = t->locals; d != NULL; d = d->next)
- {
- if ((*d->match) (d, alc))
- {
- if (h->dynindx != -1
- && info->shared
- && ! info->export_dynamic)
- {
- (*bed->elf_backend_hide_symbol) (info, h, true);
- }
-
- break;
- }
- }
- }
-
- free (alc);
- break;
- }
- }
-
- /* If we are building an application, we need to create a
- version node for this version. */
- if (t == NULL && ! info->shared)
- {
- struct bfd_elf_version_tree **pp;
- int version_index;
-
- /* If we aren't going to export this symbol, we don't need
- to worry about it. */
- if (h->dynindx == -1)
- return true;
-
- amt = sizeof *t;
- t = ((struct bfd_elf_version_tree *)
- bfd_alloc (sinfo->output_bfd, amt));
- if (t == NULL)
- {
- sinfo->failed = true;
- return false;
- }
-
- t->next = NULL;
- t->name = p;
- t->globals = NULL;
- t->locals = NULL;
- t->deps = NULL;
- t->name_indx = (unsigned int) -1;
- t->used = true;
-
- version_index = 1;
- /* Don't count anonymous version tag. */
- if (sinfo->verdefs != NULL && sinfo->verdefs->vernum == 0)
- version_index = 0;
- for (pp = &sinfo->verdefs; *pp != NULL; pp = &(*pp)->next)
- ++version_index;
- t->vernum = version_index;
-
- *pp = t;
-
- h->verinfo.vertree = t;
- }
- else if (t == NULL)
- {
- /* We could not find the version for a symbol when
- generating a shared archive. Return an error. */
- (*_bfd_error_handler)
- (_("%s: undefined versioned symbol name %s"),
- bfd_get_filename (sinfo->output_bfd), h->root.root.string);
- bfd_set_error (bfd_error_bad_value);
- sinfo->failed = true;
- return false;
- }
-
- if (hidden)
- h->elf_link_hash_flags |= ELF_LINK_HIDDEN;
- }
-
- /* If we don't have a version for this symbol, see if we can find
- something. */
- if (h->verinfo.vertree == NULL && sinfo->verdefs != NULL)
- {
- struct bfd_elf_version_tree *t;
- struct bfd_elf_version_tree *deflt;
- struct bfd_elf_version_expr *d;
-
- /* See if can find what version this symbol is in. If the
- symbol is supposed to be local, then don't actually register
- it. */
- deflt = NULL;
- for (t = sinfo->verdefs; t != NULL; t = t->next)
- {
- if (t->globals != NULL)
- {
- for (d = t->globals; d != NULL; d = d->next)
- {
- if ((*d->match) (d, h->root.root.string))
- {
- h->verinfo.vertree = t;
- break;
- }
- }
-
- if (d != NULL)
- break;
- }
-
- if (t->locals != NULL)
- {
- for (d = t->locals; d != NULL; d = d->next)
- {
- if (d->pattern[0] == '*' && d->pattern[1] == '\0')
- deflt = t;
- else if ((*d->match) (d, h->root.root.string))
- {
- h->verinfo.vertree = t;
- if (h->dynindx != -1
- && info->shared
- && ! info->export_dynamic)
- {
- (*bed->elf_backend_hide_symbol) (info, h, true);
- }
- break;
- }
- }
-
- if (d != NULL)
- break;
- }
- }
-
- if (deflt != NULL && h->verinfo.vertree == NULL)
- {
- h->verinfo.vertree = deflt;
- if (h->dynindx != -1
- && info->shared
- && ! info->export_dynamic)
- {
- (*bed->elf_backend_hide_symbol) (info, h, true);
- }
- }
- }
-
- return true;
-}
-
-/* Final phase of ELF linker. */
-
-/* A structure we use to avoid passing large numbers of arguments. */
-
-struct elf_final_link_info
-{
- /* General link information. */
- struct bfd_link_info *info;
- /* Output BFD. */
- bfd *output_bfd;
- /* Symbol string table. */
- struct bfd_strtab_hash *symstrtab;
- /* .dynsym section. */
- asection *dynsym_sec;
- /* .hash section. */
- asection *hash_sec;
- /* symbol version section (.gnu.version). */
- asection *symver_sec;
- /* Buffer large enough to hold contents of any section. */
- bfd_byte *contents;
- /* Buffer large enough to hold external relocs of any section. */
- PTR external_relocs;
- /* Buffer large enough to hold internal relocs of any section. */
- Elf_Internal_Rela *internal_relocs;
- /* Buffer large enough to hold external local symbols of any input
- BFD. */
- Elf_External_Sym *external_syms;
- /* And a buffer for symbol section indices. */
- Elf_External_Sym_Shndx *locsym_shndx;
- /* Buffer large enough to hold internal local symbols of any input
- BFD. */
- Elf_Internal_Sym *internal_syms;
- /* Array large enough to hold a symbol index for each local symbol
- of any input BFD. */
- long *indices;
- /* Array large enough to hold a section pointer for each local
- symbol of any input BFD. */
- asection **sections;
- /* Buffer to hold swapped out symbols. */
- Elf_External_Sym *symbuf;
- /* And one for symbol section indices. */
- Elf_External_Sym_Shndx *symshndxbuf;
- /* Number of swapped out symbols in buffer. */
- size_t symbuf_count;
- /* Number of symbols which fit in symbuf. */
- size_t symbuf_size;
-};
-
-static boolean elf_link_output_sym
- PARAMS ((struct elf_final_link_info *, const char *,
- Elf_Internal_Sym *, asection *));
-static boolean elf_link_flush_output_syms
- PARAMS ((struct elf_final_link_info *));
-static boolean elf_link_output_extsym
- PARAMS ((struct elf_link_hash_entry *, PTR));
-static boolean elf_link_sec_merge_syms
- PARAMS ((struct elf_link_hash_entry *, PTR));
-static boolean elf_link_input_bfd
- PARAMS ((struct elf_final_link_info *, bfd *));
-static boolean elf_reloc_link_order
- PARAMS ((bfd *, struct bfd_link_info *, asection *,
- struct bfd_link_order *));
-
-/* This struct is used to pass information to elf_link_output_extsym. */
-
-struct elf_outext_info
-{
- boolean failed;
- boolean localsyms;
- struct elf_final_link_info *finfo;
-};
-
-/* Compute the size of, and allocate space for, REL_HDR which is the
- section header for a section containing relocations for O. */
-
-static boolean
-elf_link_size_reloc_section (abfd, rel_hdr, o)
- bfd *abfd;
- Elf_Internal_Shdr *rel_hdr;
- asection *o;
-{
- bfd_size_type reloc_count;
- bfd_size_type num_rel_hashes;
-
- /* Figure out how many relocations there will be. */
- if (rel_hdr == &elf_section_data (o)->rel_hdr)
- reloc_count = elf_section_data (o)->rel_count;
- else
- reloc_count = elf_section_data (o)->rel_count2;
-
- num_rel_hashes = o->reloc_count;
- if (num_rel_hashes < reloc_count)
- num_rel_hashes = reloc_count;
-
- /* That allows us to calculate the size of the section. */
- rel_hdr->sh_size = rel_hdr->sh_entsize * reloc_count;
-
- /* The contents field must last into write_object_contents, so we
- allocate it with bfd_alloc rather than malloc. Also since we
- cannot be sure that the contents will actually be filled in,
- we zero the allocated space. */
- rel_hdr->contents = (PTR) bfd_zalloc (abfd, rel_hdr->sh_size);
- if (rel_hdr->contents == NULL && rel_hdr->sh_size != 0)
- return false;
-
- /* We only allocate one set of hash entries, so we only do it the
- first time we are called. */
- if (elf_section_data (o)->rel_hashes == NULL
- && num_rel_hashes)
- {
- struct elf_link_hash_entry **p;
-
- p = ((struct elf_link_hash_entry **)
- bfd_zmalloc (num_rel_hashes
- * sizeof (struct elf_link_hash_entry *)));
- if (p == NULL)
- return false;
-
- elf_section_data (o)->rel_hashes = p;
- }
-
- return true;
-}
-
-/* When performing a relocateable link, the input relocations are
- preserved. But, if they reference global symbols, the indices
- referenced must be updated. Update all the relocations in
- REL_HDR (there are COUNT of them), using the data in REL_HASH. */
-
-static void
-elf_link_adjust_relocs (abfd, rel_hdr, count, rel_hash)
- bfd *abfd;
- Elf_Internal_Shdr *rel_hdr;
- unsigned int count;
- struct elf_link_hash_entry **rel_hash;
-{
- unsigned int i;
- struct elf_backend_data *bed = get_elf_backend_data (abfd);
- Elf_Internal_Rel *irel;
- Elf_Internal_Rela *irela;
- bfd_size_type amt = sizeof (Elf_Internal_Rel) * bed->s->int_rels_per_ext_rel;
-
- irel = (Elf_Internal_Rel *) bfd_zmalloc (amt);
- if (irel == NULL)
- {
- (*_bfd_error_handler) (_("Error: out of memory"));
- abort ();
- }
-
- amt = sizeof (Elf_Internal_Rela) * bed->s->int_rels_per_ext_rel;
- irela = (Elf_Internal_Rela *) bfd_zmalloc (amt);
- if (irela == NULL)
- {
- (*_bfd_error_handler) (_("Error: out of memory"));
- abort ();
- }
-
- for (i = 0; i < count; i++, rel_hash++)
- {
- if (*rel_hash == NULL)
- continue;
-
- BFD_ASSERT ((*rel_hash)->indx >= 0);
-
- if (rel_hdr->sh_entsize == sizeof (Elf_External_Rel))
- {
- Elf_External_Rel *erel;
- unsigned int j;
-
- erel = (Elf_External_Rel *) rel_hdr->contents + i;
- if (bed->s->swap_reloc_in)
- (*bed->s->swap_reloc_in) (abfd, (bfd_byte *) erel, irel);
- else
- elf_swap_reloc_in (abfd, erel, irel);
-
- for (j = 0; j < bed->s->int_rels_per_ext_rel; j++)
- irel[j].r_info = ELF_R_INFO ((*rel_hash)->indx,
- ELF_R_TYPE (irel[j].r_info));
-
- if (bed->s->swap_reloc_out)
- (*bed->s->swap_reloc_out) (abfd, irel, (bfd_byte *) erel);
- else
- elf_swap_reloc_out (abfd, irel, erel);
- }
- else
- {
- Elf_External_Rela *erela;
- unsigned int j;
-
- BFD_ASSERT (rel_hdr->sh_entsize
- == sizeof (Elf_External_Rela));
-
- erela = (Elf_External_Rela *) rel_hdr->contents + i;
- if (bed->s->swap_reloca_in)
- (*bed->s->swap_reloca_in) (abfd, (bfd_byte *) erela, irela);
- else
- elf_swap_reloca_in (abfd, erela, irela);
-
- for (j = 0; j < bed->s->int_rels_per_ext_rel; j++)
- irela[j].r_info = ELF_R_INFO ((*rel_hash)->indx,
- ELF_R_TYPE (irela[j].r_info));
-
- if (bed->s->swap_reloca_out)
- (*bed->s->swap_reloca_out) (abfd, irela, (bfd_byte *) erela);
- else
- elf_swap_reloca_out (abfd, irela, erela);
- }
- }
-
- free (irel);
- free (irela);
-}
-
-struct elf_link_sort_rela {
- bfd_vma offset;
- enum elf_reloc_type_class type;
- union {
- Elf_Internal_Rel rel;
- Elf_Internal_Rela rela;
- } u;
-};
-
-static int
-elf_link_sort_cmp1 (A, B)
- const PTR A;
- const PTR B;
-{
- struct elf_link_sort_rela *a = (struct elf_link_sort_rela *) A;
- struct elf_link_sort_rela *b = (struct elf_link_sort_rela *) B;
- int relativea, relativeb;
-
- relativea = a->type == reloc_class_relative;
- relativeb = b->type == reloc_class_relative;
-
- if (relativea < relativeb)
- return 1;
- if (relativea > relativeb)
- return -1;
- if (ELF_R_SYM (a->u.rel.r_info) < ELF_R_SYM (b->u.rel.r_info))
- return -1;
- if (ELF_R_SYM (a->u.rel.r_info) > ELF_R_SYM (b->u.rel.r_info))
- return 1;
- if (a->u.rel.r_offset < b->u.rel.r_offset)
- return -1;
- if (a->u.rel.r_offset > b->u.rel.r_offset)
- return 1;
- return 0;
-}
-
-static int
-elf_link_sort_cmp2 (A, B)
- const PTR A;
- const PTR B;
-{
- struct elf_link_sort_rela *a = (struct elf_link_sort_rela *) A;
- struct elf_link_sort_rela *b = (struct elf_link_sort_rela *) B;
- int copya, copyb;
-
- if (a->offset < b->offset)
- return -1;
- if (a->offset > b->offset)
- return 1;
- copya = (a->type == reloc_class_copy) * 2 + (a->type == reloc_class_plt);
- copyb = (b->type == reloc_class_copy) * 2 + (b->type == reloc_class_plt);
- if (copya < copyb)
- return -1;
- if (copya > copyb)
- return 1;
- if (a->u.rel.r_offset < b->u.rel.r_offset)
- return -1;
- if (a->u.rel.r_offset > b->u.rel.r_offset)
- return 1;
- return 0;
-}
-
-static size_t
-elf_link_sort_relocs (abfd, info, psec)
- bfd *abfd;
- struct bfd_link_info *info;
- asection **psec;
-{
- bfd *dynobj = elf_hash_table (info)->dynobj;
- asection *reldyn, *o;
- boolean rel = false;
- bfd_size_type count, size;
- size_t i, j, ret;
- struct elf_link_sort_rela *rela;
- struct elf_backend_data *bed = get_elf_backend_data (abfd);
-
- reldyn = bfd_get_section_by_name (abfd, ".rela.dyn");
- if (reldyn == NULL || reldyn->_raw_size == 0)
- {
- reldyn = bfd_get_section_by_name (abfd, ".rel.dyn");
- if (reldyn == NULL || reldyn->_raw_size == 0)
- return 0;
- rel = true;
- count = reldyn->_raw_size / sizeof (Elf_External_Rel);
- }
- else
- count = reldyn->_raw_size / sizeof (Elf_External_Rela);
-
- size = 0;
- for (o = dynobj->sections; o != NULL; o = o->next)
- if ((o->flags & (SEC_HAS_CONTENTS|SEC_LINKER_CREATED))
- == (SEC_HAS_CONTENTS|SEC_LINKER_CREATED)
- && o->output_section == reldyn)
- size += o->_raw_size;
-
- if (size != reldyn->_raw_size)
- return 0;
-
- rela = (struct elf_link_sort_rela *) bfd_zmalloc (sizeof (*rela) * count);
- if (rela == NULL)
- {
- (*info->callbacks->warning)
- (info, _("Not enough memory to sort relocations"), 0, abfd, 0,
- (bfd_vma) 0);
- return 0;
- }
-
- for (o = dynobj->sections; o != NULL; o = o->next)
- if ((o->flags & (SEC_HAS_CONTENTS|SEC_LINKER_CREATED))
- == (SEC_HAS_CONTENTS|SEC_LINKER_CREATED)
- && o->output_section == reldyn)
- {
- if (rel)
- {
- Elf_External_Rel *erel, *erelend;
- struct elf_link_sort_rela *s;
-
- erel = (Elf_External_Rel *) o->contents;
- erelend = (Elf_External_Rel *) (o->contents + o->_raw_size);
- s = rela + o->output_offset / sizeof (Elf_External_Rel);
- for (; erel < erelend; erel++, s++)
- {
- if (bed->s->swap_reloc_in)
- (*bed->s->swap_reloc_in) (abfd, (bfd_byte *) erel, &s->u.rel);
- else
- elf_swap_reloc_in (abfd, erel, &s->u.rel);
-
- s->type = (*bed->elf_backend_reloc_type_class) (&s->u.rela);
- }
- }
- else
- {
- Elf_External_Rela *erela, *erelaend;
- struct elf_link_sort_rela *s;
-
- erela = (Elf_External_Rela *) o->contents;
- erelaend = (Elf_External_Rela *) (o->contents + o->_raw_size);
- s = rela + o->output_offset / sizeof (Elf_External_Rela);
- for (; erela < erelaend; erela++, s++)
- {
- if (bed->s->swap_reloca_in)
- (*bed->s->swap_reloca_in) (dynobj, (bfd_byte *) erela,
- &s->u.rela);
- else
- elf_swap_reloca_in (dynobj, erela, &s->u.rela);
-
- s->type = (*bed->elf_backend_reloc_type_class) (&s->u.rela);
- }
- }
- }
-
- qsort (rela, (size_t) count, sizeof (*rela), elf_link_sort_cmp1);
- for (ret = 0; ret < count && rela[ret].type == reloc_class_relative; ret++)
- ;
- for (i = ret, j = ret; i < count; i++)
- {
- if (ELF_R_SYM (rela[i].u.rel.r_info) != ELF_R_SYM (rela[j].u.rel.r_info))
- j = i;
- rela[i].offset = rela[j].u.rel.r_offset;
- }
- qsort (rela + ret, (size_t) count - ret, sizeof (*rela), elf_link_sort_cmp2);
-
- for (o = dynobj->sections; o != NULL; o = o->next)
- if ((o->flags & (SEC_HAS_CONTENTS|SEC_LINKER_CREATED))
- == (SEC_HAS_CONTENTS|SEC_LINKER_CREATED)
- && o->output_section == reldyn)
- {
- if (rel)
- {
- Elf_External_Rel *erel, *erelend;
- struct elf_link_sort_rela *s;
-
- erel = (Elf_External_Rel *) o->contents;
- erelend = (Elf_External_Rel *) (o->contents + o->_raw_size);
- s = rela + o->output_offset / sizeof (Elf_External_Rel);
- for (; erel < erelend; erel++, s++)
- {
- if (bed->s->swap_reloc_out)
- (*bed->s->swap_reloc_out) (abfd, &s->u.rel,
- (bfd_byte *) erel);
- else
- elf_swap_reloc_out (abfd, &s->u.rel, erel);
- }
- }
- else
- {
- Elf_External_Rela *erela, *erelaend;
- struct elf_link_sort_rela *s;
-
- erela = (Elf_External_Rela *) o->contents;
- erelaend = (Elf_External_Rela *) (o->contents + o->_raw_size);
- s = rela + o->output_offset / sizeof (Elf_External_Rela);
- for (; erela < erelaend; erela++, s++)
- {
- if (bed->s->swap_reloca_out)
- (*bed->s->swap_reloca_out) (dynobj, &s->u.rela,
- (bfd_byte *) erela);
- else
- elf_swap_reloca_out (dynobj, &s->u.rela, erela);
- }
- }
- }
-
- free (rela);
- *psec = reldyn;
- return ret;
-}
-
-/* Do the final step of an ELF link. */
-
-boolean
-elf_bfd_final_link (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
-{
- boolean dynamic;
- boolean emit_relocs;
- bfd *dynobj;
- struct elf_final_link_info finfo;
- register asection *o;
- register struct bfd_link_order *p;
- register bfd *sub;
- bfd_size_type max_contents_size;
- bfd_size_type max_external_reloc_size;
- bfd_size_type max_internal_reloc_count;
- bfd_size_type max_sym_count;
- bfd_size_type max_sym_shndx_count;
- file_ptr off;
- Elf_Internal_Sym elfsym;
- unsigned int i;
- Elf_Internal_Shdr *symtab_hdr;
- Elf_Internal_Shdr *symstrtab_hdr;
- struct elf_backend_data *bed = get_elf_backend_data (abfd);
- struct elf_outext_info eoinfo;
- boolean merged;
- size_t relativecount = 0;
- asection *reldyn = 0;
- bfd_size_type amt;
-
- if (! is_elf_hash_table (info))
- return false;
-
- if (info->shared)
- abfd->flags |= DYNAMIC;
-
- dynamic = elf_hash_table (info)->dynamic_sections_created;
- dynobj = elf_hash_table (info)->dynobj;
-
- emit_relocs = (info->relocateable
- || info->emitrelocations
- || bed->elf_backend_emit_relocs);
-
- finfo.info = info;
- finfo.output_bfd = abfd;
- finfo.symstrtab = elf_stringtab_init ();
- if (finfo.symstrtab == NULL)
- return false;
-
- if (! dynamic)
- {
- finfo.dynsym_sec = NULL;
- finfo.hash_sec = NULL;
- finfo.symver_sec = NULL;
- }
- else
- {
- finfo.dynsym_sec = bfd_get_section_by_name (dynobj, ".dynsym");
- finfo.hash_sec = bfd_get_section_by_name (dynobj, ".hash");
- BFD_ASSERT (finfo.dynsym_sec != NULL && finfo.hash_sec != NULL);
- finfo.symver_sec = bfd_get_section_by_name (dynobj, ".gnu.version");
- /* Note that it is OK if symver_sec is NULL. */
- }
-
- finfo.contents = NULL;
- finfo.external_relocs = NULL;
- finfo.internal_relocs = NULL;
- finfo.external_syms = NULL;
- finfo.locsym_shndx = NULL;
- finfo.internal_syms = NULL;
- finfo.indices = NULL;
- finfo.sections = NULL;
- finfo.symbuf = NULL;
- finfo.symshndxbuf = NULL;
- finfo.symbuf_count = 0;
-
- /* Count up the number of relocations we will output for each output
- section, so that we know the sizes of the reloc sections. We
- also figure out some maximum sizes. */
- max_contents_size = 0;
- max_external_reloc_size = 0;
- max_internal_reloc_count = 0;
- max_sym_count = 0;
- max_sym_shndx_count = 0;
- merged = false;
- for (o = abfd->sections; o != (asection *) NULL; o = o->next)
- {
- o->reloc_count = 0;
-
- for (p = o->link_order_head; p != NULL; p = p->next)
- {
- if (p->type == bfd_section_reloc_link_order
- || p->type == bfd_symbol_reloc_link_order)
- ++o->reloc_count;
- else if (p->type == bfd_indirect_link_order)
- {
- asection *sec;
-
- sec = p->u.indirect.section;
-
- /* Mark all sections which are to be included in the
- link. This will normally be every section. We need
- to do this so that we can identify any sections which
- the linker has decided to not include. */
- sec->linker_mark = true;
-
- if (sec->flags & SEC_MERGE)
- merged = true;
-
- if (info->relocateable || info->emitrelocations)
- o->reloc_count += sec->reloc_count;
- else if (bed->elf_backend_count_relocs)
- {
- Elf_Internal_Rela * relocs;
-
- relocs = (NAME(_bfd_elf,link_read_relocs)
- (abfd, sec, (PTR) NULL,
- (Elf_Internal_Rela *) NULL, info->keep_memory));
-
- o->reloc_count
- += (*bed->elf_backend_count_relocs) (sec, relocs);
-
- if (!info->keep_memory)
- free (relocs);
- }
-
- if (sec->_raw_size > max_contents_size)
- max_contents_size = sec->_raw_size;
- if (sec->_cooked_size > max_contents_size)
- max_contents_size = sec->_cooked_size;
-
- /* We are interested in just local symbols, not all
- symbols. */
- if (bfd_get_flavour (sec->owner) == bfd_target_elf_flavour
- && (sec->owner->flags & DYNAMIC) == 0)
- {
- size_t sym_count;
-
- if (elf_bad_symtab (sec->owner))
- sym_count = (elf_tdata (sec->owner)->symtab_hdr.sh_size
- / sizeof (Elf_External_Sym));
- else
- sym_count = elf_tdata (sec->owner)->symtab_hdr.sh_info;
-
- if (sym_count > max_sym_count)
- max_sym_count = sym_count;
-
- if (sym_count > max_sym_shndx_count
- && elf_symtab_shndx (sec->owner) != 0)
- max_sym_shndx_count = sym_count;
-
- if ((sec->flags & SEC_RELOC) != 0)
- {
- size_t ext_size;
-
- ext_size = elf_section_data (sec)->rel_hdr.sh_size;
- if (ext_size > max_external_reloc_size)
- max_external_reloc_size = ext_size;
- if (sec->reloc_count > max_internal_reloc_count)
- max_internal_reloc_count = sec->reloc_count;
- }
- }
- }
- }
-
- if (o->reloc_count > 0)
- o->flags |= SEC_RELOC;
- else
- {
- /* Explicitly clear the SEC_RELOC flag. The linker tends to
- set it (this is probably a bug) and if it is set
- assign_section_numbers will create a reloc section. */
- o->flags &=~ SEC_RELOC;
- }
-
- /* If the SEC_ALLOC flag is not set, force the section VMA to
- zero. This is done in elf_fake_sections as well, but forcing
- the VMA to 0 here will ensure that relocs against these
- sections are handled correctly. */
- if ((o->flags & SEC_ALLOC) == 0
- && ! o->user_set_vma)
- o->vma = 0;
- }
-
- if (! info->relocateable && merged)
- elf_link_hash_traverse (elf_hash_table (info),
- elf_link_sec_merge_syms, (PTR) abfd);
-
- /* Figure out the file positions for everything but the symbol table
- and the relocs. We set symcount to force assign_section_numbers
- to create a symbol table. */
- bfd_get_symcount (abfd) = info->strip == strip_all ? 0 : 1;
- BFD_ASSERT (! abfd->output_has_begun);
- if (! _bfd_elf_compute_section_file_positions (abfd, info))
- goto error_return;
-
- /* Figure out how many relocations we will have in each section.
- Just using RELOC_COUNT isn't good enough since that doesn't
- maintain a separate value for REL vs. RELA relocations. */
- if (emit_relocs)
- for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
- for (o = sub->sections; o != NULL; o = o->next)
- {
- asection *output_section;
-
- if (! o->linker_mark)
- {
- /* This section was omitted from the link. */
- continue;
- }
-
- output_section = o->output_section;
-
- if (output_section != NULL
- && (o->flags & SEC_RELOC) != 0)
- {
- struct bfd_elf_section_data *esdi
- = elf_section_data (o);
- struct bfd_elf_section_data *esdo
- = elf_section_data (output_section);
- unsigned int *rel_count;
- unsigned int *rel_count2;
- bfd_size_type entsize;
- bfd_size_type entsize2;
-
- /* We must be careful to add the relocations from the
- input section to the right output count. */
- entsize = esdi->rel_hdr.sh_entsize;
- entsize2 = esdi->rel_hdr2 ? esdi->rel_hdr2->sh_entsize : 0;
- BFD_ASSERT ((entsize == sizeof (Elf_External_Rel)
- || entsize == sizeof (Elf_External_Rela))
- && entsize2 != entsize
- && (entsize2 == 0
- || entsize2 == sizeof (Elf_External_Rel)
- || entsize2 == sizeof (Elf_External_Rela)));
- if (entsize == esdo->rel_hdr.sh_entsize)
- {
- rel_count = &esdo->rel_count;
- rel_count2 = &esdo->rel_count2;
- }
- else
- {
- rel_count = &esdo->rel_count2;
- rel_count2 = &esdo->rel_count;
- }
-
- *rel_count += NUM_SHDR_ENTRIES (& esdi->rel_hdr);
- if (esdi->rel_hdr2)
- *rel_count2 += NUM_SHDR_ENTRIES (esdi->rel_hdr2);
- output_section->flags |= SEC_RELOC;
- }
- }
-
- /* That created the reloc sections. Set their sizes, and assign
- them file positions, and allocate some buffers. */
- for (o = abfd->sections; o != NULL; o = o->next)
- {
- if ((o->flags & SEC_RELOC) != 0)
- {
- if (!elf_link_size_reloc_section (abfd,
- &elf_section_data (o)->rel_hdr,
- o))
- goto error_return;
-
- if (elf_section_data (o)->rel_hdr2
- && !elf_link_size_reloc_section (abfd,
- elf_section_data (o)->rel_hdr2,
- o))
- goto error_return;
- }
-
- /* Now, reset REL_COUNT and REL_COUNT2 so that we can use them
- to count upwards while actually outputting the relocations. */
- elf_section_data (o)->rel_count = 0;
- elf_section_data (o)->rel_count2 = 0;
- }
-
- _bfd_elf_assign_file_positions_for_relocs (abfd);
-
- /* We have now assigned file positions for all the sections except
- .symtab and .strtab. We start the .symtab section at the current
- file position, and write directly to it. We build the .strtab
- section in memory. */
- bfd_get_symcount (abfd) = 0;
- symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
- /* sh_name is set in prep_headers. */
- symtab_hdr->sh_type = SHT_SYMTAB;
- symtab_hdr->sh_flags = 0;
- symtab_hdr->sh_addr = 0;
- symtab_hdr->sh_size = 0;
- symtab_hdr->sh_entsize = sizeof (Elf_External_Sym);
- /* sh_link is set in assign_section_numbers. */
- /* sh_info is set below. */
- /* sh_offset is set just below. */
- symtab_hdr->sh_addralign = bed->s->file_align;
-
- off = elf_tdata (abfd)->next_file_pos;
- off = _bfd_elf_assign_file_position_for_section (symtab_hdr, off, true);
-
- /* Note that at this point elf_tdata (abfd)->next_file_pos is
- incorrect. We do not yet know the size of the .symtab section.
- We correct next_file_pos below, after we do know the size. */
-
- /* Allocate a buffer to hold swapped out symbols. This is to avoid
- continuously seeking to the right position in the file. */
- if (! info->keep_memory || max_sym_count < 20)
- finfo.symbuf_size = 20;
- else
- finfo.symbuf_size = max_sym_count;
- amt = finfo.symbuf_size;
- amt *= sizeof (Elf_External_Sym);
- finfo.symbuf = (Elf_External_Sym *) bfd_malloc (amt);
- if (finfo.symbuf == NULL)
- goto error_return;
- if (elf_numsections (abfd) > SHN_LORESERVE)
- {
- amt = finfo.symbuf_size;
- amt *= sizeof (Elf_External_Sym_Shndx);
- finfo.symshndxbuf = (Elf_External_Sym_Shndx *) bfd_malloc (amt);
- if (finfo.symshndxbuf == NULL)
- goto error_return;
- }
-
- /* Start writing out the symbol table. The first symbol is always a
- dummy symbol. */
- if (info->strip != strip_all
- || emit_relocs)
- {
- elfsym.st_value = 0;
- elfsym.st_size = 0;
- elfsym.st_info = 0;
- elfsym.st_other = 0;
- elfsym.st_shndx = SHN_UNDEF;
- if (! elf_link_output_sym (&finfo, (const char *) NULL,
- &elfsym, bfd_und_section_ptr))
- goto error_return;
- }
-
-#if 0
- /* Some standard ELF linkers do this, but we don't because it causes
- bootstrap comparison failures. */
- /* Output a file symbol for the output file as the second symbol.
- We output this even if we are discarding local symbols, although
- I'm not sure if this is correct. */
- elfsym.st_value = 0;
- elfsym.st_size = 0;
- elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FILE);
- elfsym.st_other = 0;
- elfsym.st_shndx = SHN_ABS;
- if (! elf_link_output_sym (&finfo, bfd_get_filename (abfd),
- &elfsym, bfd_abs_section_ptr))
- goto error_return;
-#endif
-
- /* Output a symbol for each section. We output these even if we are
- discarding local symbols, since they are used for relocs. These
- symbols have no names. We store the index of each one in the
- index field of the section, so that we can find it again when
- outputting relocs. */
- if (info->strip != strip_all
- || emit_relocs)
- {
- elfsym.st_size = 0;
- elfsym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
- elfsym.st_other = 0;
- for (i = 1; i < elf_numsections (abfd); i++)
- {
- o = section_from_elf_index (abfd, i);
- if (o != NULL)
- o->target_index = bfd_get_symcount (abfd);
- elfsym.st_shndx = i;
- if (info->relocateable || o == NULL)
- elfsym.st_value = 0;
- else
- elfsym.st_value = o->vma;
- if (! elf_link_output_sym (&finfo, (const char *) NULL,
- &elfsym, o))
- goto error_return;
- if (i == SHN_LORESERVE)
- i += SHN_HIRESERVE + 1 - SHN_LORESERVE;
- }
- }
-
- /* Allocate some memory to hold information read in from the input
- files. */
- if (max_contents_size != 0)
- {
- finfo.contents = (bfd_byte *) bfd_malloc (max_contents_size);
- if (finfo.contents == NULL)
- goto error_return;
- }
-
- if (max_external_reloc_size != 0)
- {
- finfo.external_relocs = (PTR) bfd_malloc (max_external_reloc_size);
- if (finfo.external_relocs == NULL)
- goto error_return;
- }
-
- if (max_internal_reloc_count != 0)
- {
- amt = max_internal_reloc_count * bed->s->int_rels_per_ext_rel;
- amt *= sizeof (Elf_Internal_Rela);
- finfo.internal_relocs = (Elf_Internal_Rela *) bfd_malloc (amt);
- if (finfo.internal_relocs == NULL)
- goto error_return;
- }
-
- if (max_sym_count != 0)
- {
- amt = max_sym_count * sizeof (Elf_External_Sym);
- finfo.external_syms = (Elf_External_Sym *) bfd_malloc (amt);
- if (finfo.external_syms == NULL)
- goto error_return;
-
- amt = max_sym_count * sizeof (Elf_Internal_Sym);
- finfo.internal_syms = (Elf_Internal_Sym *) bfd_malloc (amt);
- if (finfo.internal_syms == NULL)
- goto error_return;
-
- amt = max_sym_count * sizeof (long);
- finfo.indices = (long *) bfd_malloc (amt);
- if (finfo.indices == NULL)
- goto error_return;
-
- amt = max_sym_count * sizeof (asection *);
- finfo.sections = (asection **) bfd_malloc (amt);
- if (finfo.sections == NULL)
- goto error_return;
- }
-
- if (max_sym_shndx_count != 0)
- {
- amt = max_sym_shndx_count * sizeof (Elf_External_Sym_Shndx);
- finfo.locsym_shndx = (Elf_External_Sym_Shndx *) bfd_malloc (amt);
- if (finfo.locsym_shndx == NULL)
- goto error_return;
- }
-
- /* Since ELF permits relocations to be against local symbols, we
- must have the local symbols available when we do the relocations.
- Since we would rather only read the local symbols once, and we
- would rather not keep them in memory, we handle all the
- relocations for a single input file at the same time.
-
- Unfortunately, there is no way to know the total number of local
- symbols until we have seen all of them, and the local symbol
- indices precede the global symbol indices. This means that when
- we are generating relocateable output, and we see a reloc against
- a global symbol, we can not know the symbol index until we have
- finished examining all the local symbols to see which ones we are
- going to output. To deal with this, we keep the relocations in
- memory, and don't output them until the end of the link. This is
- an unfortunate waste of memory, but I don't see a good way around
- it. Fortunately, it only happens when performing a relocateable
- link, which is not the common case. FIXME: If keep_memory is set
- we could write the relocs out and then read them again; I don't
- know how bad the memory loss will be. */
-
- for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
- sub->output_has_begun = false;
- for (o = abfd->sections; o != NULL; o = o->next)
- {
- for (p = o->link_order_head; p != NULL; p = p->next)
- {
- if (p->type == bfd_indirect_link_order
- && (bfd_get_flavour ((sub = p->u.indirect.section->owner))
- == bfd_target_elf_flavour)
- && elf_elfheader (sub)->e_ident[EI_CLASS] == bed->s->elfclass)
- {
- if (! sub->output_has_begun)
- {
- if (! elf_link_input_bfd (&finfo, sub))
- goto error_return;
- sub->output_has_begun = true;
- }
- }
- else if (p->type == bfd_section_reloc_link_order
- || p->type == bfd_symbol_reloc_link_order)
- {
- if (! elf_reloc_link_order (abfd, info, o, p))
- goto error_return;
- }
- else
- {
- if (! _bfd_default_link_order (abfd, info, o, p))
- goto error_return;
- }
- }
- }
-
- /* Output any global symbols that got converted to local in a
- version script or due to symbol visibility. We do this in a
- separate step since ELF requires all local symbols to appear
- prior to any global symbols. FIXME: We should only do this if
- some global symbols were, in fact, converted to become local.
- FIXME: Will this work correctly with the Irix 5 linker? */
- eoinfo.failed = false;
- eoinfo.finfo = &finfo;
- eoinfo.localsyms = true;
- elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym,
- (PTR) &eoinfo);
- if (eoinfo.failed)
- return false;
-
- /* That wrote out all the local symbols. Finish up the symbol table
- with the global symbols. Even if we want to strip everything we
- can, we still need to deal with those global symbols that got
- converted to local in a version script. */
-
- /* The sh_info field records the index of the first non local symbol. */
- symtab_hdr->sh_info = bfd_get_symcount (abfd);
-
- if (dynamic
- && finfo.dynsym_sec->output_section != bfd_abs_section_ptr)
- {
- Elf_Internal_Sym sym;
- Elf_External_Sym *dynsym =
- (Elf_External_Sym *) finfo.dynsym_sec->contents;
- long last_local = 0;
-
- /* Write out the section symbols for the output sections. */
- if (info->shared)
- {
- asection *s;
-
- sym.st_size = 0;
- sym.st_name = 0;
- sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_SECTION);
- sym.st_other = 0;
-
- for (s = abfd->sections; s != NULL; s = s->next)
- {
- int indx;
- Elf_External_Sym *dest;
-
- indx = elf_section_data (s)->this_idx;
- BFD_ASSERT (indx > 0);
- sym.st_shndx = indx;
- sym.st_value = s->vma;
- dest = dynsym + elf_section_data (s)->dynindx;
- elf_swap_symbol_out (abfd, &sym, (PTR) dest, (PTR) 0);
- }
-
- last_local = bfd_count_sections (abfd);
- }
-
- /* Write out the local dynsyms. */
- if (elf_hash_table (info)->dynlocal)
- {
- struct elf_link_local_dynamic_entry *e;
- for (e = elf_hash_table (info)->dynlocal; e ; e = e->next)
- {
- asection *s;
- Elf_External_Sym *dest;
-
- sym.st_size = e->isym.st_size;
- sym.st_other = e->isym.st_other;
-
- /* Copy the internal symbol as is.
- Note that we saved a word of storage and overwrote
- the original st_name with the dynstr_index. */
- sym = e->isym;
-
- if (e->isym.st_shndx != SHN_UNDEF
- && (e->isym.st_shndx < SHN_LORESERVE
- || e->isym.st_shndx > SHN_HIRESERVE))
- {
- s = bfd_section_from_elf_index (e->input_bfd,
- e->isym.st_shndx);
-
- sym.st_shndx =
- elf_section_data (s->output_section)->this_idx;
- sym.st_value = (s->output_section->vma
- + s->output_offset
- + e->isym.st_value);
- }
-
- if (last_local < e->dynindx)
- last_local = e->dynindx;
-
- dest = dynsym + e->dynindx;
- elf_swap_symbol_out (abfd, &sym, (PTR) dest, (PTR) 0);
- }
- }
-
- elf_section_data (finfo.dynsym_sec->output_section)->this_hdr.sh_info =
- last_local + 1;
- }
-
- /* We get the global symbols from the hash table. */
- eoinfo.failed = false;
- eoinfo.localsyms = false;
- eoinfo.finfo = &finfo;
- elf_link_hash_traverse (elf_hash_table (info), elf_link_output_extsym,
- (PTR) &eoinfo);
- if (eoinfo.failed)
- return false;
-
- /* If backend needs to output some symbols not present in the hash
- table, do it now. */
- if (bed->elf_backend_output_arch_syms)
- {
- typedef boolean (*out_sym_func) PARAMS ((PTR, const char *,
- Elf_Internal_Sym *,
- asection *));
-
- if (! ((*bed->elf_backend_output_arch_syms)
- (abfd, info, (PTR) &finfo, (out_sym_func) elf_link_output_sym)))
- return false;
- }
-
- /* Flush all symbols to the file. */
- if (! elf_link_flush_output_syms (&finfo))
- return false;
-
- /* Now we know the size of the symtab section. */
- off += symtab_hdr->sh_size;
-
- /* Finish up and write out the symbol string table (.strtab)
- section. */
- symstrtab_hdr = &elf_tdata (abfd)->strtab_hdr;
- /* sh_name was set in prep_headers. */
- symstrtab_hdr->sh_type = SHT_STRTAB;
- symstrtab_hdr->sh_flags = 0;
- symstrtab_hdr->sh_addr = 0;
- symstrtab_hdr->sh_size = _bfd_stringtab_size (finfo.symstrtab);
- symstrtab_hdr->sh_entsize = 0;
- symstrtab_hdr->sh_link = 0;
- symstrtab_hdr->sh_info = 0;
- /* sh_offset is set just below. */
- symstrtab_hdr->sh_addralign = 1;
-
- off = _bfd_elf_assign_file_position_for_section (symstrtab_hdr, off, true);
- elf_tdata (abfd)->next_file_pos = off;
-
- if (bfd_get_symcount (abfd) > 0)
- {
- if (bfd_seek (abfd, symstrtab_hdr->sh_offset, SEEK_SET) != 0
- || ! _bfd_stringtab_emit (abfd, finfo.symstrtab))
- return false;
- }
-
- /* Adjust the relocs to have the correct symbol indices. */
- for (o = abfd->sections; o != NULL; o = o->next)
- {
- if ((o->flags & SEC_RELOC) == 0)
- continue;
-
- elf_link_adjust_relocs (abfd, &elf_section_data (o)->rel_hdr,
- elf_section_data (o)->rel_count,
- elf_section_data (o)->rel_hashes);
- if (elf_section_data (o)->rel_hdr2 != NULL)
- elf_link_adjust_relocs (abfd, elf_section_data (o)->rel_hdr2,
- elf_section_data (o)->rel_count2,
- (elf_section_data (o)->rel_hashes
- + elf_section_data (o)->rel_count));
-
- /* Set the reloc_count field to 0 to prevent write_relocs from
- trying to swap the relocs out itself. */
- o->reloc_count = 0;
- }
-
- if (dynamic && info->combreloc && dynobj != NULL)
- relativecount = elf_link_sort_relocs (abfd, info, &reldyn);
-
- /* If we are linking against a dynamic object, or generating a
- shared library, finish up the dynamic linking information. */
- if (dynamic)
- {
- Elf_External_Dyn *dyncon, *dynconend;
-
- /* Fix up .dynamic entries. */
- o = bfd_get_section_by_name (dynobj, ".dynamic");
- BFD_ASSERT (o != NULL);
-
- dyncon = (Elf_External_Dyn *) o->contents;
- dynconend = (Elf_External_Dyn *) (o->contents + o->_raw_size);
- for (; dyncon < dynconend; dyncon++)
- {
- Elf_Internal_Dyn dyn;
- const char *name;
- unsigned int type;
-
- elf_swap_dyn_in (dynobj, dyncon, &dyn);
-
- switch (dyn.d_tag)
- {
- default:
- break;
- case DT_NULL:
- if (relativecount > 0 && dyncon + 1 < dynconend)
- {
- switch (elf_section_data (reldyn)->this_hdr.sh_type)
- {
- case SHT_REL: dyn.d_tag = DT_RELCOUNT; break;
- case SHT_RELA: dyn.d_tag = DT_RELACOUNT; break;
- default: break;
- }
- if (dyn.d_tag != DT_NULL)
- {
- dyn.d_un.d_val = relativecount;
- elf_swap_dyn_out (dynobj, &dyn, dyncon);
- relativecount = 0;
- }
- }
- break;
- case DT_INIT:
- name = info->init_function;
- goto get_sym;
- case DT_FINI:
- name = info->fini_function;
- get_sym:
- {
- struct elf_link_hash_entry *h;
-
- h = elf_link_hash_lookup (elf_hash_table (info), name,
- false, false, true);
- if (h != NULL
- && (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak))
- {
- dyn.d_un.d_val = h->root.u.def.value;
- o = h->root.u.def.section;
- if (o->output_section != NULL)
- dyn.d_un.d_val += (o->output_section->vma
- + o->output_offset);
- else
- {
- /* The symbol is imported from another shared
- library and does not apply to this one. */
- dyn.d_un.d_val = 0;
- }
-
- elf_swap_dyn_out (dynobj, &dyn, dyncon);
- }
- }
- break;
-
- case DT_PREINIT_ARRAYSZ:
- name = ".preinit_array";
- goto get_size;
- case DT_INIT_ARRAYSZ:
- name = ".init_array";
- goto get_size;
- case DT_FINI_ARRAYSZ:
- name = ".fini_array";
- get_size:
- o = bfd_get_section_by_name (abfd, name);
- BFD_ASSERT (o != NULL);
- if (o->_raw_size == 0)
- (*_bfd_error_handler)
- (_("warning: %s section has zero size"), name);
- dyn.d_un.d_val = o->_raw_size;
- elf_swap_dyn_out (dynobj, &dyn, dyncon);
- break;
-
- case DT_PREINIT_ARRAY:
- name = ".preinit_array";
- goto get_vma;
- case DT_INIT_ARRAY:
- name = ".init_array";
- goto get_vma;
- case DT_FINI_ARRAY:
- name = ".fini_array";
- goto get_vma;
-
- case DT_HASH:
- name = ".hash";
- goto get_vma;
- case DT_STRTAB:
- name = ".dynstr";
- goto get_vma;
- case DT_SYMTAB:
- name = ".dynsym";
- goto get_vma;
- case DT_VERDEF:
- name = ".gnu.version_d";
- goto get_vma;
- case DT_VERNEED:
- name = ".gnu.version_r";
- goto get_vma;
- case DT_VERSYM:
- name = ".gnu.version";
- get_vma:
- o = bfd_get_section_by_name (abfd, name);
- BFD_ASSERT (o != NULL);
- dyn.d_un.d_ptr = o->vma;
- elf_swap_dyn_out (dynobj, &dyn, dyncon);
- break;
-
- case DT_REL:
- case DT_RELA:
- case DT_RELSZ:
- case DT_RELASZ:
- if (dyn.d_tag == DT_REL || dyn.d_tag == DT_RELSZ)
- type = SHT_REL;
- else
- type = SHT_RELA;
- dyn.d_un.d_val = 0;
- for (i = 1; i < elf_numsections (abfd); i++)
- {
- Elf_Internal_Shdr *hdr;
-
- hdr = elf_elfsections (abfd)[i];
- if (hdr->sh_type == type
- && (hdr->sh_flags & SHF_ALLOC) != 0)
- {
- if (dyn.d_tag == DT_RELSZ || dyn.d_tag == DT_RELASZ)
- dyn.d_un.d_val += hdr->sh_size;
- else
- {
- if (dyn.d_un.d_val == 0
- || hdr->sh_addr < dyn.d_un.d_val)
- dyn.d_un.d_val = hdr->sh_addr;
- }
- }
- }
- elf_swap_dyn_out (dynobj, &dyn, dyncon);
- break;
- }
- }
- }
-
- /* If we have created any dynamic sections, then output them. */
- if (dynobj != NULL)
- {
- if (! (*bed->elf_backend_finish_dynamic_sections) (abfd, info))
- goto error_return;
-
- for (o = dynobj->sections; o != NULL; o = o->next)
- {
- if ((o->flags & SEC_HAS_CONTENTS) == 0
- || o->_raw_size == 0
- || o->output_section == bfd_abs_section_ptr)
- continue;
- if ((o->flags & SEC_LINKER_CREATED) == 0)
- {
- /* At this point, we are only interested in sections
- created by elf_link_create_dynamic_sections. */
- continue;
- }
- if ((elf_section_data (o->output_section)->this_hdr.sh_type
- != SHT_STRTAB)
- || strcmp (bfd_get_section_name (abfd, o), ".dynstr") != 0)
- {
- if (! bfd_set_section_contents (abfd, o->output_section,
- o->contents,
- (file_ptr) o->output_offset,
- o->_raw_size))
- goto error_return;
- }
- else
- {
- /* The contents of the .dynstr section are actually in a
- stringtab. */
- off = elf_section_data (o->output_section)->this_hdr.sh_offset;
- if (bfd_seek (abfd, off, SEEK_SET) != 0
- || ! _bfd_elf_strtab_emit (abfd,
- elf_hash_table (info)->dynstr))
- goto error_return;
- }
- }
- }
-
- /* If we have optimized stabs strings, output them. */
- if (elf_hash_table (info)->stab_info != NULL)
- {
- if (! _bfd_write_stab_strings (abfd, &elf_hash_table (info)->stab_info))
- goto error_return;
- }
-
- if (info->eh_frame_hdr && elf_hash_table (info)->dynobj)
- {
- o = bfd_get_section_by_name (elf_hash_table (info)->dynobj,
- ".eh_frame_hdr");
- if (o
- && (elf_section_data (o)->sec_info_type
- == ELF_INFO_TYPE_EH_FRAME_HDR))
- {
- if (! _bfd_elf_write_section_eh_frame_hdr (abfd, o))
- goto error_return;
- }
- }
-
- if (finfo.symstrtab != NULL)
- _bfd_stringtab_free (finfo.symstrtab);
- if (finfo.contents != NULL)
- free (finfo.contents);
- if (finfo.external_relocs != NULL)
- free (finfo.external_relocs);
- if (finfo.internal_relocs != NULL)
- free (finfo.internal_relocs);
- if (finfo.external_syms != NULL)
- free (finfo.external_syms);
- if (finfo.locsym_shndx != NULL)
- free (finfo.locsym_shndx);
- if (finfo.internal_syms != NULL)
- free (finfo.internal_syms);
- if (finfo.indices != NULL)
- free (finfo.indices);
- if (finfo.sections != NULL)
- free (finfo.sections);
- if (finfo.symbuf != NULL)
- free (finfo.symbuf);
- if (finfo.symshndxbuf != NULL)
- free (finfo.symbuf);
- for (o = abfd->sections; o != NULL; o = o->next)
- {
- if ((o->flags & SEC_RELOC) != 0
- && elf_section_data (o)->rel_hashes != NULL)
- free (elf_section_data (o)->rel_hashes);
- }
-
- elf_tdata (abfd)->linker = true;
-
- return true;
-
- error_return:
- if (finfo.symstrtab != NULL)
- _bfd_stringtab_free (finfo.symstrtab);
- if (finfo.contents != NULL)
- free (finfo.contents);
- if (finfo.external_relocs != NULL)
- free (finfo.external_relocs);
- if (finfo.internal_relocs != NULL)
- free (finfo.internal_relocs);
- if (finfo.external_syms != NULL)
- free (finfo.external_syms);
- if (finfo.locsym_shndx != NULL)
- free (finfo.locsym_shndx);
- if (finfo.internal_syms != NULL)
- free (finfo.internal_syms);
- if (finfo.indices != NULL)
- free (finfo.indices);
- if (finfo.sections != NULL)
- free (finfo.sections);
- if (finfo.symbuf != NULL)
- free (finfo.symbuf);
- if (finfo.symshndxbuf != NULL)
- free (finfo.symbuf);
- for (o = abfd->sections; o != NULL; o = o->next)
- {
- if ((o->flags & SEC_RELOC) != 0
- && elf_section_data (o)->rel_hashes != NULL)
- free (elf_section_data (o)->rel_hashes);
- }
-
- return false;
-}
-
-/* Add a symbol to the output symbol table. */
-
-static boolean
-elf_link_output_sym (finfo, name, elfsym, input_sec)
- struct elf_final_link_info *finfo;
- const char *name;
- Elf_Internal_Sym *elfsym;
- asection *input_sec;
-{
- Elf_External_Sym *dest;
- Elf_External_Sym_Shndx *destshndx;
-
- boolean (*output_symbol_hook) PARAMS ((bfd *,
- struct bfd_link_info *info,
- const char *,
- Elf_Internal_Sym *,
- asection *));
-
- output_symbol_hook = get_elf_backend_data (finfo->output_bfd)->
- elf_backend_link_output_symbol_hook;
- if (output_symbol_hook != NULL)
- {
- if (! ((*output_symbol_hook)
- (finfo->output_bfd, finfo->info, name, elfsym, input_sec)))
- return false;
- }
-
- if (name == (const char *) NULL || *name == '\0')
- elfsym->st_name = 0;
- else if (input_sec->flags & SEC_EXCLUDE)
- elfsym->st_name = 0;
- else
- {
- elfsym->st_name = (unsigned long) _bfd_stringtab_add (finfo->symstrtab,
- name, true, false);
- if (elfsym->st_name == (unsigned long) -1)
- return false;
- }
-
- if (finfo->symbuf_count >= finfo->symbuf_size)
- {
- if (! elf_link_flush_output_syms (finfo))
- return false;
- }
-
- dest = finfo->symbuf + finfo->symbuf_count;
- destshndx = finfo->symshndxbuf;
- if (destshndx != NULL)
- destshndx += finfo->symbuf_count;
- elf_swap_symbol_out (finfo->output_bfd, elfsym, (PTR) dest, (PTR) destshndx);
- ++finfo->symbuf_count;
-
- ++ bfd_get_symcount (finfo->output_bfd);
-
- return true;
-}
-
-/* Flush the output symbols to the file. */
-
-static boolean
-elf_link_flush_output_syms (finfo)
- struct elf_final_link_info *finfo;
-{
- if (finfo->symbuf_count > 0)
- {
- Elf_Internal_Shdr *hdr;
- file_ptr pos;
- bfd_size_type amt;
-
- hdr = &elf_tdata (finfo->output_bfd)->symtab_hdr;
- pos = hdr->sh_offset + hdr->sh_size;
- amt = finfo->symbuf_count * sizeof (Elf_External_Sym);
- if (bfd_seek (finfo->output_bfd, pos, SEEK_SET) != 0
- || bfd_bwrite ((PTR) finfo->symbuf, amt, finfo->output_bfd) != amt)
- return false;
-
- hdr->sh_size += amt;
-
- if (finfo->symshndxbuf != NULL)
- {
- hdr = &elf_tdata (finfo->output_bfd)->symtab_shndx_hdr;
- pos = hdr->sh_offset + hdr->sh_size;
- amt = finfo->symbuf_count * sizeof (Elf_External_Sym_Shndx);
- if (bfd_seek (finfo->output_bfd, pos, SEEK_SET) != 0
- || (bfd_bwrite ((PTR) finfo->symshndxbuf, amt, finfo->output_bfd)
- != amt))
- return false;
-
- hdr->sh_size += amt;
- }
-
- finfo->symbuf_count = 0;
- }
-
- return true;
-}
-
-/* Adjust all external symbols pointing into SEC_MERGE sections
- to reflect the object merging within the sections. */
-
-static boolean
-elf_link_sec_merge_syms (h, data)
- struct elf_link_hash_entry *h;
- PTR data;
-{
- asection *sec;
-
- if (h->root.type == bfd_link_hash_warning)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
-
- if ((h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
- && ((sec = h->root.u.def.section)->flags & SEC_MERGE)
- && elf_section_data (sec)->sec_info_type == ELF_INFO_TYPE_MERGE)
- {
- bfd *output_bfd = (bfd *) data;
-
- h->root.u.def.value =
- _bfd_merged_section_offset (output_bfd,
- &h->root.u.def.section,
- elf_section_data (sec)->sec_info,
- h->root.u.def.value, (bfd_vma) 0);
- }
-
- return true;
-}
-
-/* Add an external symbol to the symbol table. This is called from
- the hash table traversal routine. When generating a shared object,
- we go through the symbol table twice. The first time we output
- anything that might have been forced to local scope in a version
- script. The second time we output the symbols that are still
- global symbols. */
-
-static boolean
-elf_link_output_extsym (h, data)
- struct elf_link_hash_entry *h;
- PTR data;
-{
- struct elf_outext_info *eoinfo = (struct elf_outext_info *) data;
- struct elf_final_link_info *finfo = eoinfo->finfo;
- boolean strip;
- Elf_Internal_Sym sym;
- asection *input_sec;
-
- if (h->root.type == bfd_link_hash_warning)
- {
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
- if (h->root.type == bfd_link_hash_new)
- return true;
- }
-
- /* Decide whether to output this symbol in this pass. */
- if (eoinfo->localsyms)
- {
- if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
- return true;
- }
- else
- {
- if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)
- return true;
- }
-
- /* If we are not creating a shared library, and this symbol is
- referenced by a shared library but is not defined anywhere, then
- warn that it is undefined. If we do not do this, the runtime
- linker will complain that the symbol is undefined when the
- program is run. We don't have to worry about symbols that are
- referenced by regular files, because we will already have issued
- warnings for them. */
- if (! finfo->info->relocateable
- && ! finfo->info->allow_shlib_undefined
- && ! finfo->info->shared
- && h->root.type == bfd_link_hash_undefined
- && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0
- && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0)
- {
- if (! ((*finfo->info->callbacks->undefined_symbol)
- (finfo->info, h->root.root.string, h->root.u.undef.abfd,
- (asection *) NULL, (bfd_vma) 0, true)))
- {
- eoinfo->failed = true;
- return false;
- }
- }
-
- /* We don't want to output symbols that have never been mentioned by
- a regular file, or that we have been told to strip. However, if
- h->indx is set to -2, the symbol is used by a reloc and we must
- output it. */
- if (h->indx == -2)
- strip = false;
- else if (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
- || (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0)
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
- && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0)
- strip = true;
- else if (finfo->info->strip == strip_all
- || (finfo->info->strip == strip_some
- && bfd_hash_lookup (finfo->info->keep_hash,
- h->root.root.string,
- false, false) == NULL))
- strip = true;
- else
- strip = false;
-
- /* If we're stripping it, and it's not a dynamic symbol, there's
- nothing else to do unless it is a forced local symbol. */
- if (strip
- && h->dynindx == -1
- && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
- return true;
-
- sym.st_value = 0;
- sym.st_size = h->size;
- sym.st_other = h->other;
- if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)
- sym.st_info = ELF_ST_INFO (STB_LOCAL, h->type);
- else if (h->root.type == bfd_link_hash_undefweak
- || h->root.type == bfd_link_hash_defweak)
- sym.st_info = ELF_ST_INFO (STB_WEAK, h->type);
- else
- sym.st_info = ELF_ST_INFO (STB_GLOBAL, h->type);
-
- switch (h->root.type)
- {
- default:
- case bfd_link_hash_new:
- case bfd_link_hash_warning:
- abort ();
- return false;
-
- case bfd_link_hash_undefined:
- case bfd_link_hash_undefweak:
- input_sec = bfd_und_section_ptr;
- sym.st_shndx = SHN_UNDEF;
- break;
-
- case bfd_link_hash_defined:
- case bfd_link_hash_defweak:
- {
- input_sec = h->root.u.def.section;
- if (input_sec->output_section != NULL)
- {
- sym.st_shndx =
- _bfd_elf_section_from_bfd_section (finfo->output_bfd,
- input_sec->output_section);
- if (sym.st_shndx == SHN_BAD)
- {
- (*_bfd_error_handler)
- (_("%s: could not find output section %s for input section %s"),
- bfd_get_filename (finfo->output_bfd),
- input_sec->output_section->name,
- input_sec->name);
- eoinfo->failed = true;
- return false;
- }
-
- /* ELF symbols in relocateable files are section relative,
- but in nonrelocateable files they are virtual
- addresses. */
- sym.st_value = h->root.u.def.value + input_sec->output_offset;
- if (! finfo->info->relocateable)
- sym.st_value += input_sec->output_section->vma;
- }
- else
- {
- BFD_ASSERT (input_sec->owner == NULL
- || (input_sec->owner->flags & DYNAMIC) != 0);
- sym.st_shndx = SHN_UNDEF;
- input_sec = bfd_und_section_ptr;
- }
- }
- break;
-
- case bfd_link_hash_common:
- input_sec = h->root.u.c.p->section;
- sym.st_shndx = SHN_COMMON;
- sym.st_value = 1 << h->root.u.c.p->alignment_power;
- break;
-
- case bfd_link_hash_indirect:
- /* These symbols are created by symbol versioning. They point
- to the decorated version of the name. For example, if the
- symbol foo@@GNU_1.2 is the default, which should be used when
- foo is used with no version, then we add an indirect symbol
- foo which points to foo@@GNU_1.2. We ignore these symbols,
- since the indirected symbol is already in the hash table. */
- return true;
- }
-
- /* Give the processor backend a chance to tweak the symbol value,
- and also to finish up anything that needs to be done for this
- symbol. FIXME: Not calling elf_backend_finish_dynamic_symbol for
- forced local syms when non-shared is due to a historical quirk. */
- if ((h->dynindx != -1
- || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)
- && (finfo->info->shared
- || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
- && elf_hash_table (finfo->info)->dynamic_sections_created)
- {
- struct elf_backend_data *bed;
-
- bed = get_elf_backend_data (finfo->output_bfd);
- if (! ((*bed->elf_backend_finish_dynamic_symbol)
- (finfo->output_bfd, finfo->info, h, &sym)))
- {
- eoinfo->failed = true;
- return false;
- }
- }
-
- /* If we are marking the symbol as undefined, and there are no
- non-weak references to this symbol from a regular object, then
- mark the symbol as weak undefined; if there are non-weak
- references, mark the symbol as strong. We can't do this earlier,
- because it might not be marked as undefined until the
- finish_dynamic_symbol routine gets through with it. */
- if (sym.st_shndx == SHN_UNDEF
- && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) != 0
- && (ELF_ST_BIND (sym.st_info) == STB_GLOBAL
- || ELF_ST_BIND (sym.st_info) == STB_WEAK))
- {
- int bindtype;
-
- if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK) != 0)
- bindtype = STB_GLOBAL;
- else
- bindtype = STB_WEAK;
- sym.st_info = ELF_ST_INFO (bindtype, ELF_ST_TYPE (sym.st_info));
- }
-
- /* If a symbol is not defined locally, we clear the visibility
- field. */
- if (! finfo->info->relocateable
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
- sym.st_other ^= ELF_ST_VISIBILITY (sym.st_other);
-
- /* If this symbol should be put in the .dynsym section, then put it
- there now. We have already know the symbol index. We also fill
- in the entry in the .hash section. */
- if (h->dynindx != -1
- && elf_hash_table (finfo->info)->dynamic_sections_created)
- {
- size_t bucketcount;
- size_t bucket;
- size_t hash_entry_size;
- bfd_byte *bucketpos;
- bfd_vma chain;
- Elf_External_Sym *esym;
-
- sym.st_name = h->dynstr_index;
- esym = (Elf_External_Sym *) finfo->dynsym_sec->contents + h->dynindx;
- elf_swap_symbol_out (finfo->output_bfd, &sym, (PTR) esym, (PTR) 0);
-
- bucketcount = elf_hash_table (finfo->info)->bucketcount;
- bucket = h->elf_hash_value % bucketcount;
- hash_entry_size
- = elf_section_data (finfo->hash_sec)->this_hdr.sh_entsize;
- bucketpos = ((bfd_byte *) finfo->hash_sec->contents
- + (bucket + 2) * hash_entry_size);
- chain = bfd_get (8 * hash_entry_size, finfo->output_bfd, bucketpos);
- bfd_put (8 * hash_entry_size, finfo->output_bfd, (bfd_vma) h->dynindx,
- bucketpos);
- bfd_put (8 * hash_entry_size, finfo->output_bfd, chain,
- ((bfd_byte *) finfo->hash_sec->contents
- + (bucketcount + 2 + h->dynindx) * hash_entry_size));
-
- if (finfo->symver_sec != NULL && finfo->symver_sec->contents != NULL)
- {
- Elf_Internal_Versym iversym;
- Elf_External_Versym *eversym;
-
- if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
- {
- if (h->verinfo.verdef == NULL)
- iversym.vs_vers = 0;
- else
- iversym.vs_vers = h->verinfo.verdef->vd_exp_refno + 1;
- }
- else
- {
- if (h->verinfo.vertree == NULL)
- iversym.vs_vers = 1;
- else
- iversym.vs_vers = h->verinfo.vertree->vernum + 1;
- }
-
- if ((h->elf_link_hash_flags & ELF_LINK_HIDDEN) != 0)
- iversym.vs_vers |= VERSYM_HIDDEN;
-
- eversym = (Elf_External_Versym *) finfo->symver_sec->contents;
- eversym += h->dynindx;
- _bfd_elf_swap_versym_out (finfo->output_bfd, &iversym, eversym);
- }
- }
-
- /* If we're stripping it, then it was just a dynamic symbol, and
- there's nothing else to do. */
- if (strip)
- return true;
-
- h->indx = bfd_get_symcount (finfo->output_bfd);
-
- if (! elf_link_output_sym (finfo, h->root.root.string, &sym, input_sec))
- {
- eoinfo->failed = true;
- return false;
- }
-
- return true;
-}
-
-/* Copy the relocations indicated by the INTERNAL_RELOCS (which
- originated from the section given by INPUT_REL_HDR) to the
- OUTPUT_BFD. */
-
-static void
-elf_link_output_relocs (output_bfd, input_section, input_rel_hdr,
- internal_relocs)
- bfd *output_bfd;
- asection *input_section;
- Elf_Internal_Shdr *input_rel_hdr;
- Elf_Internal_Rela *internal_relocs;
-{
- Elf_Internal_Rela *irela;
- Elf_Internal_Rela *irelaend;
- Elf_Internal_Shdr *output_rel_hdr;
- asection *output_section;
- unsigned int *rel_countp = NULL;
- struct elf_backend_data *bed;
- bfd_size_type amt;
-
- output_section = input_section->output_section;
- output_rel_hdr = NULL;
-
- if (elf_section_data (output_section)->rel_hdr.sh_entsize
- == input_rel_hdr->sh_entsize)
- {
- output_rel_hdr = &elf_section_data (output_section)->rel_hdr;
- rel_countp = &elf_section_data (output_section)->rel_count;
- }
- else if (elf_section_data (output_section)->rel_hdr2
- && (elf_section_data (output_section)->rel_hdr2->sh_entsize
- == input_rel_hdr->sh_entsize))
- {
- output_rel_hdr = elf_section_data (output_section)->rel_hdr2;
- rel_countp = &elf_section_data (output_section)->rel_count2;
- }
-
- BFD_ASSERT (output_rel_hdr != NULL);
-
- bed = get_elf_backend_data (output_bfd);
- irela = internal_relocs;
- irelaend = irela + NUM_SHDR_ENTRIES (input_rel_hdr)
- * bed->s->int_rels_per_ext_rel;
-
- if (input_rel_hdr->sh_entsize == sizeof (Elf_External_Rel))
- {
- Elf_External_Rel *erel;
- Elf_Internal_Rel *irel;
-
- amt = bed->s->int_rels_per_ext_rel * sizeof (Elf_Internal_Rel);
- irel = (Elf_Internal_Rel *) bfd_zmalloc (amt);
- if (irel == NULL)
- {
- (*_bfd_error_handler) (_("Error: out of memory"));
- abort ();
- }
-
- erel = ((Elf_External_Rel *) output_rel_hdr->contents + *rel_countp);
- for (; irela < irelaend; irela += bed->s->int_rels_per_ext_rel, erel++)
- {
- unsigned int i;
-
- for (i = 0; i < bed->s->int_rels_per_ext_rel; i++)
- {
- irel[i].r_offset = irela[i].r_offset;
- irel[i].r_info = irela[i].r_info;
- BFD_ASSERT (irela[i].r_addend == 0);
- }
-
- if (bed->s->swap_reloc_out)
- (*bed->s->swap_reloc_out) (output_bfd, irel, (PTR) erel);
- else
- elf_swap_reloc_out (output_bfd, irel, erel);
- }
-
- free (irel);
- }
- else
- {
- Elf_External_Rela *erela;
-
- BFD_ASSERT (input_rel_hdr->sh_entsize == sizeof (Elf_External_Rela));
-
- erela = ((Elf_External_Rela *) output_rel_hdr->contents + *rel_countp);
- for (; irela < irelaend; irela += bed->s->int_rels_per_ext_rel, erela++)
- if (bed->s->swap_reloca_out)
- (*bed->s->swap_reloca_out) (output_bfd, irela, (PTR) erela);
- else
- elf_swap_reloca_out (output_bfd, irela, erela);
- }
-
- /* Bump the counter, so that we know where to add the next set of
- relocations. */
- *rel_countp += NUM_SHDR_ENTRIES (input_rel_hdr);
-}
-
-/* Link an input file into the linker output file. This function
- handles all the sections and relocations of the input file at once.
- This is so that we only have to read the local symbols once, and
- don't have to keep them in memory. */
-
-static boolean
-elf_link_input_bfd (finfo, input_bfd)
- struct elf_final_link_info *finfo;
- bfd *input_bfd;
-{
- boolean (*relocate_section) PARAMS ((bfd *, struct bfd_link_info *,
- bfd *, asection *, bfd_byte *,
- Elf_Internal_Rela *,
- Elf_Internal_Sym *, asection **));
- bfd *output_bfd;
- Elf_Internal_Shdr *symtab_hdr;
- Elf_Internal_Shdr *shndx_hdr;
- size_t locsymcount;
- size_t extsymoff;
- Elf_External_Sym *external_syms;
- Elf_External_Sym *esym;
- Elf_External_Sym *esymend;
- Elf_External_Sym_Shndx *shndx_buf;
- Elf_External_Sym_Shndx *shndx;
- Elf_Internal_Sym *isym;
- long *pindex;
- asection **ppsection;
- asection *o;
- struct elf_backend_data *bed;
- boolean emit_relocs;
- struct elf_link_hash_entry **sym_hashes;
-
- output_bfd = finfo->output_bfd;
- bed = get_elf_backend_data (output_bfd);
- relocate_section = bed->elf_backend_relocate_section;
-
- /* If this is a dynamic object, we don't want to do anything here:
- we don't want the local symbols, and we don't want the section
- contents. */
- if ((input_bfd->flags & DYNAMIC) != 0)
- return true;
-
- emit_relocs = (finfo->info->relocateable
- || finfo->info->emitrelocations
- || bed->elf_backend_emit_relocs);
-
- symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
- if (elf_bad_symtab (input_bfd))
- {
- locsymcount = symtab_hdr->sh_size / sizeof (Elf_External_Sym);
- extsymoff = 0;
- }
- else
- {
- locsymcount = symtab_hdr->sh_info;
- extsymoff = symtab_hdr->sh_info;
- }
-
- /* Read the local symbols. */
- if (symtab_hdr->contents != NULL)
- external_syms = (Elf_External_Sym *) symtab_hdr->contents;
- else if (locsymcount == 0)
- external_syms = NULL;
- else
- {
- bfd_size_type amt = locsymcount * sizeof (Elf_External_Sym);
- external_syms = finfo->external_syms;
- if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0
- || bfd_bread (external_syms, amt, input_bfd) != amt)
- return false;
- }
-
- shndx_hdr = &elf_tdata (input_bfd)->symtab_shndx_hdr;
- shndx_buf = NULL;
- if (shndx_hdr->sh_size != 0 && locsymcount != 0)
- {
- bfd_size_type amt = locsymcount * sizeof (Elf_External_Sym_Shndx);
- shndx_buf = finfo->locsym_shndx;
- if (bfd_seek (input_bfd, shndx_hdr->sh_offset, SEEK_SET) != 0
- || bfd_bread (shndx_buf, amt, input_bfd) != amt)
- return false;
- }
-
- /* Swap in the local symbols and write out the ones which we know
- are going into the output file. */
- for (esym = external_syms, esymend = esym + locsymcount,
- isym = finfo->internal_syms, pindex = finfo->indices,
- ppsection = finfo->sections, shndx = shndx_buf;
- esym < esymend;
- esym++, isym++, pindex++, ppsection++,
- shndx = (shndx != NULL ? shndx + 1 : NULL))
- {
- asection *isec;
- const char *name;
- Elf_Internal_Sym osym;
-
- elf_swap_symbol_in (input_bfd, esym, shndx, isym);
- *pindex = -1;
-
- if (elf_bad_symtab (input_bfd))
- {
- if (ELF_ST_BIND (isym->st_info) != STB_LOCAL)
- {
- *ppsection = NULL;
- continue;
- }
- }
-
- if (isym->st_shndx == SHN_UNDEF)
- isec = bfd_und_section_ptr;
- else if (isym->st_shndx < SHN_LORESERVE
- || isym->st_shndx > SHN_HIRESERVE)
- {
- isec = section_from_elf_index (input_bfd, isym->st_shndx);
- if (isec
- && elf_section_data (isec)->sec_info_type == ELF_INFO_TYPE_MERGE
- && ELF_ST_TYPE (isym->st_info) != STT_SECTION)
- isym->st_value =
- _bfd_merged_section_offset (output_bfd, &isec,
- elf_section_data (isec)->sec_info,
- isym->st_value, (bfd_vma) 0);
- }
- else if (isym->st_shndx == SHN_ABS)
- isec = bfd_abs_section_ptr;
- else if (isym->st_shndx == SHN_COMMON)
- isec = bfd_com_section_ptr;
- else
- {
- /* Who knows? */
- isec = NULL;
- }
-
- *ppsection = isec;
-
- /* Don't output the first, undefined, symbol. */
- if (esym == external_syms)
- continue;
-
- if (ELF_ST_TYPE (isym->st_info) == STT_SECTION)
- {
- /* We never output section symbols. Instead, we use the
- section symbol of the corresponding section in the output
- file. */
- continue;
- }
-
- /* If we are stripping all symbols, we don't want to output this
- one. */
- if (finfo->info->strip == strip_all)
- continue;
-
- /* If we are discarding all local symbols, we don't want to
- output this one. If we are generating a relocateable output
- file, then some of the local symbols may be required by
- relocs; we output them below as we discover that they are
- needed. */
- if (finfo->info->discard == discard_all)
- continue;
-
- /* If this symbol is defined in a section which we are
- discarding, we don't need to keep it, but note that
- linker_mark is only reliable for sections that have contents.
- For the benefit of the MIPS ELF linker, we check SEC_EXCLUDE
- as well as linker_mark. */
- if ((isym->st_shndx < SHN_LORESERVE || isym->st_shndx > SHN_HIRESERVE)
- && isec != NULL
- && ((! isec->linker_mark && (isec->flags & SEC_HAS_CONTENTS) != 0)
- || (! finfo->info->relocateable
- && (isec->flags & SEC_EXCLUDE) != 0)))
- continue;
-
- /* Get the name of the symbol. */
- name = bfd_elf_string_from_elf_section (input_bfd, symtab_hdr->sh_link,
- isym->st_name);
- if (name == NULL)
- return false;
-
- /* See if we are discarding symbols with this name. */
- if ((finfo->info->strip == strip_some
- && (bfd_hash_lookup (finfo->info->keep_hash, name, false, false)
- == NULL))
- || (((finfo->info->discard == discard_sec_merge
- && (isec->flags & SEC_MERGE) && ! finfo->info->relocateable)
- || finfo->info->discard == discard_l)
- && bfd_is_local_label_name (input_bfd, name)))
- continue;
-
- /* If we get here, we are going to output this symbol. */
-
- osym = *isym;
-
- /* Adjust the section index for the output file. */
- osym.st_shndx = _bfd_elf_section_from_bfd_section (output_bfd,
- isec->output_section);
- if (osym.st_shndx == SHN_BAD)
- return false;
-
- *pindex = bfd_get_symcount (output_bfd);
-
- /* ELF symbols in relocateable files are section relative, but
- in executable files they are virtual addresses. Note that
- this code assumes that all ELF sections have an associated
- BFD section with a reasonable value for output_offset; below
- we assume that they also have a reasonable value for
- output_section. Any special sections must be set up to meet
- these requirements. */
- osym.st_value += isec->output_offset;
- if (! finfo->info->relocateable)
- osym.st_value += isec->output_section->vma;
-
- if (! elf_link_output_sym (finfo, name, &osym, isec))
- return false;
- }
-
- /* Relocate the contents of each section. */
- sym_hashes = elf_sym_hashes (input_bfd);
- for (o = input_bfd->sections; o != NULL; o = o->next)
- {
- bfd_byte *contents;
-
- if (! o->linker_mark)
- {
- /* This section was omitted from the link. */
- continue;
- }
-
- if ((o->flags & SEC_HAS_CONTENTS) == 0
- || (o->_raw_size == 0 && (o->flags & SEC_RELOC) == 0))
- continue;
-
- if ((o->flags & SEC_LINKER_CREATED) != 0)
- {
- /* Section was created by elf_link_create_dynamic_sections
- or somesuch. */
- continue;
- }
-
- /* Get the contents of the section. They have been cached by a
- relaxation routine. Note that o is a section in an input
- file, so the contents field will not have been set by any of
- the routines which work on output files. */
- if (elf_section_data (o)->this_hdr.contents != NULL)
- contents = elf_section_data (o)->this_hdr.contents;
- else
- {
- contents = finfo->contents;
- if (! bfd_get_section_contents (input_bfd, o, contents,
- (file_ptr) 0, o->_raw_size))
- return false;
- }
-
- if ((o->flags & SEC_RELOC) != 0)
- {
- Elf_Internal_Rela *internal_relocs;
-
- /* Get the swapped relocs. */
- internal_relocs = (NAME(_bfd_elf,link_read_relocs)
- (input_bfd, o, finfo->external_relocs,
- finfo->internal_relocs, false));
- if (internal_relocs == NULL
- && o->reloc_count > 0)
- return false;
-
- /* Run through the relocs looking for any against symbols
- from discarded sections and section symbols from
- removed link-once sections. Complain about relocs
- against discarded sections. Zero relocs against removed
- link-once sections. We should really complain if
- anything in the final link tries to use it, but
- DWARF-based exception handling might have an entry in
- .eh_frame to describe a routine in the linkonce section,
- and it turns out to be hard to remove the .eh_frame
- entry too. FIXME. */
- if (!finfo->info->relocateable
- && !elf_section_ignore_discarded_relocs (o))
- {
- Elf_Internal_Rela *rel, *relend;
-
- rel = internal_relocs;
- relend = rel + o->reloc_count * bed->s->int_rels_per_ext_rel;
- for ( ; rel < relend; rel++)
- {
- unsigned long r_symndx = ELF_R_SYM (rel->r_info);
-
- if (r_symndx >= locsymcount
- || (elf_bad_symtab (input_bfd)
- && finfo->sections[r_symndx] == NULL))
- {
- struct elf_link_hash_entry *h;
-
- h = sym_hashes[r_symndx - extsymoff];
- while (h->root.type == bfd_link_hash_indirect
- || h->root.type == bfd_link_hash_warning)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
-
- /* Complain if the definition comes from a
- discarded section. */
- if ((h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
- && elf_discarded_section (h->root.u.def.section))
- {
-#if BFD_VERSION_DATE < 20031005
- if ((o->flags & SEC_DEBUGGING) != 0)
- {
-#if BFD_VERSION_DATE > 20021005
- (*finfo->info->callbacks->warning)
- (finfo->info,
- _("warning: relocation against removed section; zeroing"),
- NULL, input_bfd, o, rel->r_offset);
-#endif
- BFD_ASSERT (r_symndx != 0);
- memset (rel, 0, sizeof (*rel));
- }
- else
-#endif
- {
- if (! ((*finfo->info->callbacks->undefined_symbol)
- (finfo->info, h->root.root.string,
- input_bfd, o, rel->r_offset,
- true)))
- return false;
- }
- }
- }
- else
- {
- asection *sec = finfo->sections[r_symndx];
-
- if (sec != NULL && elf_discarded_section (sec))
- {
-#if BFD_VERSION_DATE < 20031005
- if ((o->flags & SEC_DEBUGGING) != 0
- || (sec->flags & SEC_LINK_ONCE) != 0)
- {
-#if BFD_VERSION_DATE > 20021005
- (*finfo->info->callbacks->warning)
- (finfo->info,
- _("warning: relocation against removed section"),
- NULL, input_bfd, o, rel->r_offset);
-#endif
- BFD_ASSERT (r_symndx != 0);
- rel->r_info
- = ELF_R_INFO (0, ELF_R_TYPE (rel->r_info));
- rel->r_addend = 0;
- }
- else
-#endif
- {
- boolean ok;
- const char *msg
- = _("local symbols in discarded section %s");
- bfd_size_type amt
- = strlen (sec->name) + strlen (msg) - 1;
- char *buf = (char *) bfd_malloc (amt);
-
- if (buf != NULL)
- sprintf (buf, msg, sec->name);
- else
- buf = (char *) sec->name;
- ok = (*finfo->info->callbacks
- ->undefined_symbol) (finfo->info, buf,
- input_bfd, o,
- rel->r_offset,
- true);
- if (buf != sec->name)
- free (buf);
- if (!ok)
- return false;
- }
- }
- }
- }
- }
-
- /* Relocate the section by invoking a back end routine.
-
- The back end routine is responsible for adjusting the
- section contents as necessary, and (if using Rela relocs
- and generating a relocateable output file) adjusting the
- reloc addend as necessary.
-
- The back end routine does not have to worry about setting
- the reloc address or the reloc symbol index.
-
- The back end routine is given a pointer to the swapped in
- internal symbols, and can access the hash table entries
- for the external symbols via elf_sym_hashes (input_bfd).
-
- When generating relocateable output, the back end routine
- must handle STB_LOCAL/STT_SECTION symbols specially. The
- output symbol is going to be a section symbol
- corresponding to the output section, which will require
- the addend to be adjusted. */
-
- if (! (*relocate_section) (output_bfd, finfo->info,
- input_bfd, o, contents,
- internal_relocs,
- finfo->internal_syms,
- finfo->sections))
- return false;
-
- if (emit_relocs)
- {
- Elf_Internal_Rela *irela;
- Elf_Internal_Rela *irelaend;
- struct elf_link_hash_entry **rel_hash;
- Elf_Internal_Shdr *input_rel_hdr;
- unsigned int next_erel;
- void (*reloc_emitter) PARAMS ((bfd *, asection *,
- Elf_Internal_Shdr *,
- Elf_Internal_Rela *));
- boolean rela_normal;
-
- input_rel_hdr = &elf_section_data (o)->rel_hdr;
- rela_normal = (bed->rela_normal
- && (input_rel_hdr->sh_entsize
- == sizeof (Elf_External_Rela)));
-
- /* Adjust the reloc addresses and symbol indices. */
-
- irela = internal_relocs;
- irelaend = irela + o->reloc_count * bed->s->int_rels_per_ext_rel;
- rel_hash = (elf_section_data (o->output_section)->rel_hashes
- + elf_section_data (o->output_section)->rel_count
- + elf_section_data (o->output_section)->rel_count2);
- for (next_erel = 0; irela < irelaend; irela++, next_erel++)
- {
- unsigned long r_symndx;
- asection *sec;
-
- if (next_erel == bed->s->int_rels_per_ext_rel)
- {
- rel_hash++;
- next_erel = 0;
- }
-
- irela->r_offset += o->output_offset;
-
- /* Relocs in an executable have to be virtual addresses. */
- if (!finfo->info->relocateable)
- irela->r_offset += o->output_section->vma;
-
- r_symndx = ELF_R_SYM (irela->r_info);
-
- if (r_symndx == 0)
- continue;
-
- if (r_symndx >= locsymcount
- || (elf_bad_symtab (input_bfd)
- && finfo->sections[r_symndx] == NULL))
- {
- struct elf_link_hash_entry *rh;
- unsigned long indx;
-
- /* This is a reloc against a global symbol. We
- have not yet output all the local symbols, so
- we do not know the symbol index of any global
- symbol. We set the rel_hash entry for this
- reloc to point to the global hash table entry
- for this symbol. The symbol index is then
- set at the end of elf_bfd_final_link. */
- indx = r_symndx - extsymoff;
- rh = elf_sym_hashes (input_bfd)[indx];
- while (rh->root.type == bfd_link_hash_indirect
- || rh->root.type == bfd_link_hash_warning)
- rh = (struct elf_link_hash_entry *) rh->root.u.i.link;
-
- /* Setting the index to -2 tells
- elf_link_output_extsym that this symbol is
- used by a reloc. */
- BFD_ASSERT (rh->indx < 0);
- rh->indx = -2;
-
- *rel_hash = rh;
-
- continue;
- }
-
- /* This is a reloc against a local symbol. */
-
- *rel_hash = NULL;
- isym = finfo->internal_syms + r_symndx;
- sec = finfo->sections[r_symndx];
- if (ELF_ST_TYPE (isym->st_info) == STT_SECTION)
- {
- /* I suppose the backend ought to fill in the
- section of any STT_SECTION symbol against a
- processor specific section. If we have
- discarded a section, the output_section will
- be the absolute section. */
- if (bfd_is_abs_section (sec)
- || (sec != NULL
- && bfd_is_abs_section (sec->output_section)))
- r_symndx = 0;
- else if (sec == NULL || sec->owner == NULL)
- {
- bfd_set_error (bfd_error_bad_value);
- return false;
- }
- else
- {
- r_symndx = sec->output_section->target_index;
- BFD_ASSERT (r_symndx != 0);
- }
-
- /* Adjust the addend according to where the
- section winds up in the output section. */
- if (rela_normal)
- irela->r_addend += sec->output_offset;
- }
- else
- {
- if (finfo->indices[r_symndx] == -1)
- {
- unsigned long shlink;
- const char *name;
- asection *osec;
-
- if (finfo->info->strip == strip_all)
- {
- /* You can't do ld -r -s. */
- bfd_set_error (bfd_error_invalid_operation);
- return false;
- }
-
- /* This symbol was skipped earlier, but
- since it is needed by a reloc, we
- must output it now. */
- shlink = symtab_hdr->sh_link;
- name = (bfd_elf_string_from_elf_section
- (input_bfd, shlink, isym->st_name));
- if (name == NULL)
- return false;
-
- osec = sec->output_section;
- isym->st_shndx =
- _bfd_elf_section_from_bfd_section (output_bfd,
- osec);
- if (isym->st_shndx == SHN_BAD)
- return false;
-
- isym->st_value += sec->output_offset;
- if (! finfo->info->relocateable)
- isym->st_value += osec->vma;
-
- finfo->indices[r_symndx]
- = bfd_get_symcount (output_bfd);
-
- if (! elf_link_output_sym (finfo, name, isym, sec))
- return false;
- }
-
- r_symndx = finfo->indices[r_symndx];
- }
-
- irela->r_info = ELF_R_INFO (r_symndx,
- ELF_R_TYPE (irela->r_info));
- }
-
- /* Swap out the relocs. */
- if (bed->elf_backend_emit_relocs
- && !(finfo->info->relocateable
- || finfo->info->emitrelocations))
- reloc_emitter = bed->elf_backend_emit_relocs;
- else
- reloc_emitter = elf_link_output_relocs;
-
- (*reloc_emitter) (output_bfd, o, input_rel_hdr, internal_relocs);
-
- input_rel_hdr = elf_section_data (o)->rel_hdr2;
- if (input_rel_hdr)
- {
- internal_relocs += (NUM_SHDR_ENTRIES (input_rel_hdr)
- * bed->s->int_rels_per_ext_rel);
- (*reloc_emitter) (output_bfd, o, input_rel_hdr,
- internal_relocs);
- }
-
- }
- }
-
- /* Write out the modified section contents. */
- if (bed->elf_backend_write_section
- && (*bed->elf_backend_write_section) (output_bfd, o, contents))
- {
- /* Section written out. */
- }
- else switch (elf_section_data (o)->sec_info_type)
- {
- case ELF_INFO_TYPE_STABS:
- if (! (_bfd_write_section_stabs
- (output_bfd,
- &elf_hash_table (finfo->info)->stab_info,
- o, &elf_section_data (o)->sec_info, contents)))
- return false;
- break;
- case ELF_INFO_TYPE_MERGE:
- if (! (_bfd_write_merged_section
- (output_bfd, o, elf_section_data (o)->sec_info)))
- return false;
- break;
- case ELF_INFO_TYPE_EH_FRAME:
- {
- asection *ehdrsec;
-
- ehdrsec
- = bfd_get_section_by_name (elf_hash_table (finfo->info)->dynobj,
- ".eh_frame_hdr");
- if (! (_bfd_elf_write_section_eh_frame (output_bfd, o, ehdrsec,
- contents)))
- return false;
- }
- break;
- default:
- {
- bfd_size_type sec_size;
-
- sec_size = (o->_cooked_size != 0 ? o->_cooked_size : o->_raw_size);
- if (! (o->flags & SEC_EXCLUDE)
- && ! bfd_set_section_contents (output_bfd, o->output_section,
- contents,
- (file_ptr) o->output_offset,
- sec_size))
- return false;
- }
- break;
- }
- }
-
- return true;
-}
-
-/* Generate a reloc when linking an ELF file. This is a reloc
- requested by the linker, and does come from any input file. This
- is used to build constructor and destructor tables when linking
- with -Ur. */
-
-static boolean
-elf_reloc_link_order (output_bfd, info, output_section, link_order)
- bfd *output_bfd;
- struct bfd_link_info *info;
- asection *output_section;
- struct bfd_link_order *link_order;
-{
- reloc_howto_type *howto;
- long indx;
- bfd_vma offset;
- bfd_vma addend;
- struct elf_link_hash_entry **rel_hash_ptr;
- Elf_Internal_Shdr *rel_hdr;
- struct elf_backend_data *bed = get_elf_backend_data (output_bfd);
-
- howto = bfd_reloc_type_lookup (output_bfd, link_order->u.reloc.p->reloc);
- if (howto == NULL)
- {
- bfd_set_error (bfd_error_bad_value);
- return false;
- }
-
- addend = link_order->u.reloc.p->addend;
-
- /* Figure out the symbol index. */
- rel_hash_ptr = (elf_section_data (output_section)->rel_hashes
- + elf_section_data (output_section)->rel_count
- + elf_section_data (output_section)->rel_count2);
- if (link_order->type == bfd_section_reloc_link_order)
- {
- indx = link_order->u.reloc.p->u.section->target_index;
- BFD_ASSERT (indx != 0);
- *rel_hash_ptr = NULL;
- }
- else
- {
- struct elf_link_hash_entry *h;
-
- /* Treat a reloc against a defined symbol as though it were
- actually against the section. */
- h = ((struct elf_link_hash_entry *)
- bfd_wrapped_link_hash_lookup (output_bfd, info,
- link_order->u.reloc.p->u.name,
- false, false, true));
- if (h != NULL
- && (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak))
- {
- asection *section;
-
- section = h->root.u.def.section;
- indx = section->output_section->target_index;
- *rel_hash_ptr = NULL;
- /* It seems that we ought to add the symbol value to the
- addend here, but in practice it has already been added
- because it was passed to constructor_callback. */
- addend += section->output_section->vma + section->output_offset;
- }
- else if (h != NULL)
- {
- /* Setting the index to -2 tells elf_link_output_extsym that
- this symbol is used by a reloc. */
- h->indx = -2;
- *rel_hash_ptr = h;
- indx = 0;
- }
- else
- {
- if (! ((*info->callbacks->unattached_reloc)
- (info, link_order->u.reloc.p->u.name, (bfd *) NULL,
- (asection *) NULL, (bfd_vma) 0)))
- return false;
- indx = 0;
- }
- }
-
- /* If this is an inplace reloc, we must write the addend into the
- object file. */
- if (howto->partial_inplace && addend != 0)
- {
- bfd_size_type size;
- bfd_reloc_status_type rstat;
- bfd_byte *buf;
- boolean ok;
- const char *sym_name;
-
- size = bfd_get_reloc_size (howto);
- buf = (bfd_byte *) bfd_zmalloc (size);
- if (buf == (bfd_byte *) NULL)
- return false;
- rstat = _bfd_relocate_contents (howto, output_bfd, (bfd_vma) addend, buf);
- switch (rstat)
- {
- case bfd_reloc_ok:
- break;
-
- default:
- case bfd_reloc_outofrange:
- abort ();
-
- case bfd_reloc_overflow:
- if (link_order->type == bfd_section_reloc_link_order)
- sym_name = bfd_section_name (output_bfd,
- link_order->u.reloc.p->u.section);
- else
- sym_name = link_order->u.reloc.p->u.name;
- if (! ((*info->callbacks->reloc_overflow)
- (info, sym_name, howto->name, addend,
- (bfd *) NULL, (asection *) NULL, (bfd_vma) 0)))
- {
- free (buf);
- return false;
- }
- break;
- }
- ok = bfd_set_section_contents (output_bfd, output_section, (PTR) buf,
- (file_ptr) link_order->offset, size);
- free (buf);
- if (! ok)
- return false;
- }
-
- /* The address of a reloc is relative to the section in a
- relocateable file, and is a virtual address in an executable
- file. */
- offset = link_order->offset;
- if (! info->relocateable)
- offset += output_section->vma;
-
- rel_hdr = &elf_section_data (output_section)->rel_hdr;
-
- if (rel_hdr->sh_type == SHT_REL)
- {
- bfd_size_type size;
- Elf_Internal_Rel *irel;
- Elf_External_Rel *erel;
- unsigned int i;
-
- size = bed->s->int_rels_per_ext_rel * sizeof (Elf_Internal_Rel);
- irel = (Elf_Internal_Rel *) bfd_zmalloc (size);
- if (irel == NULL)
- return false;
-
- for (i = 0; i < bed->s->int_rels_per_ext_rel; i++)
- irel[i].r_offset = offset;
- irel[0].r_info = ELF_R_INFO (indx, howto->type);
-
- erel = ((Elf_External_Rel *) rel_hdr->contents
- + elf_section_data (output_section)->rel_count);
-
- if (bed->s->swap_reloc_out)
- (*bed->s->swap_reloc_out) (output_bfd, irel, (bfd_byte *) erel);
- else
- elf_swap_reloc_out (output_bfd, irel, erel);
-
- free (irel);
- }
- else
- {
- bfd_size_type size;
- Elf_Internal_Rela *irela;
- Elf_External_Rela *erela;
- unsigned int i;
-
- size = bed->s->int_rels_per_ext_rel * sizeof (Elf_Internal_Rela);
- irela = (Elf_Internal_Rela *) bfd_zmalloc (size);
- if (irela == NULL)
- return false;
-
- for (i = 0; i < bed->s->int_rels_per_ext_rel; i++)
- irela[i].r_offset = offset;
- irela[0].r_info = ELF_R_INFO (indx, howto->type);
- irela[0].r_addend = addend;
-
- erela = ((Elf_External_Rela *) rel_hdr->contents
- + elf_section_data (output_section)->rel_count);
-
- if (bed->s->swap_reloca_out)
- (*bed->s->swap_reloca_out) (output_bfd, irela, (bfd_byte *) erela);
- else
- elf_swap_reloca_out (output_bfd, irela, erela);
- }
-
- ++elf_section_data (output_section)->rel_count;
-
- return true;
-}
-
-/* Allocate a pointer to live in a linker created section. */
-
-boolean
-elf_create_pointer_linker_section (abfd, info, lsect, h, rel)
- bfd *abfd;
- struct bfd_link_info *info;
- elf_linker_section_t *lsect;
- struct elf_link_hash_entry *h;
- const Elf_Internal_Rela *rel;
-{
- elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
- elf_linker_section_pointers_t *linker_section_ptr;
- unsigned long r_symndx = ELF_R_SYM (rel->r_info);
- bfd_size_type amt;
-
- BFD_ASSERT (lsect != NULL);
-
- /* Is this a global symbol? */
- if (h != NULL)
- {
- /* Has this symbol already been allocated? If so, our work is done. */
- if (_bfd_elf_find_pointer_linker_section (h->linker_section_pointer,
- rel->r_addend,
- lsect->which))
- return true;
-
- ptr_linker_section_ptr = &h->linker_section_pointer;
- /* Make sure this symbol is output as a dynamic symbol. */
- if (h->dynindx == -1)
- {
- if (! elf_link_record_dynamic_symbol (info, h))
- return false;
- }
-
- if (lsect->rel_section)
- lsect->rel_section->_raw_size += sizeof (Elf_External_Rela);
- }
- else
- {
- /* Allocation of a pointer to a local symbol. */
- elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
-
- /* Allocate a table to hold the local symbols if first time. */
- if (!ptr)
- {
- unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
- register unsigned int i;
-
- amt = num_symbols;
- amt *= sizeof (elf_linker_section_pointers_t *);
- ptr = (elf_linker_section_pointers_t **) bfd_alloc (abfd, amt);
-
- if (!ptr)
- return false;
-
- elf_local_ptr_offsets (abfd) = ptr;
- for (i = 0; i < num_symbols; i++)
- ptr[i] = (elf_linker_section_pointers_t *) 0;
- }
-
- /* Has this symbol already been allocated? If so, our work is done. */
- if (_bfd_elf_find_pointer_linker_section (ptr[r_symndx],
- rel->r_addend,
- lsect->which))
- return true;
-
- ptr_linker_section_ptr = &ptr[r_symndx];
-
- if (info->shared)
- {
- /* If we are generating a shared object, we need to
- output a R_<xxx>_RELATIVE reloc so that the
- dynamic linker can adjust this GOT entry. */
- BFD_ASSERT (lsect->rel_section != NULL);
- lsect->rel_section->_raw_size += sizeof (Elf_External_Rela);
- }
- }
-
- /* Allocate space for a pointer in the linker section, and allocate
- a new pointer record from internal memory. */
- BFD_ASSERT (ptr_linker_section_ptr != NULL);
- amt = sizeof (elf_linker_section_pointers_t);
- linker_section_ptr = (elf_linker_section_pointers_t *) bfd_alloc (abfd, amt);
-
- if (!linker_section_ptr)
- return false;
-
- linker_section_ptr->next = *ptr_linker_section_ptr;
- linker_section_ptr->addend = rel->r_addend;
- linker_section_ptr->which = lsect->which;
- linker_section_ptr->written_address_p = false;
- *ptr_linker_section_ptr = linker_section_ptr;
-
-#if 0
- if (lsect->hole_size && lsect->hole_offset < lsect->max_hole_offset)
- {
- linker_section_ptr->offset = (lsect->section->_raw_size
- - lsect->hole_size + (ARCH_SIZE / 8));
- lsect->hole_offset += ARCH_SIZE / 8;
- lsect->sym_offset += ARCH_SIZE / 8;
- if (lsect->sym_hash)
- {
- /* Bump up symbol value if needed. */
- lsect->sym_hash->root.u.def.value += ARCH_SIZE / 8;
-#ifdef DEBUG
- fprintf (stderr, "Bump up %s by %ld, current value = %ld\n",
- lsect->sym_hash->root.root.string,
- (long) ARCH_SIZE / 8,
- (long) lsect->sym_hash->root.u.def.value);
-#endif
- }
- }
- else
-#endif
- linker_section_ptr->offset = lsect->section->_raw_size;
-
- lsect->section->_raw_size += ARCH_SIZE / 8;
-
-#ifdef DEBUG
- fprintf (stderr,
- "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
- lsect->name, (long) linker_section_ptr->offset,
- (long) lsect->section->_raw_size);
-#endif
-
- return true;
-}
-
-#if ARCH_SIZE==64
-#define bfd_put_ptr(BFD,VAL,ADDR) bfd_put_64 (BFD, VAL, ADDR)
-#endif
-#if ARCH_SIZE==32
-#define bfd_put_ptr(BFD,VAL,ADDR) bfd_put_32 (BFD, VAL, ADDR)
-#endif
-
-/* Fill in the address for a pointer generated in a linker section. */
-
-bfd_vma
-elf_finish_pointer_linker_section (output_bfd, input_bfd, info, lsect, h,
- relocation, rel, relative_reloc)
- bfd *output_bfd;
- bfd *input_bfd;
- struct bfd_link_info *info;
- elf_linker_section_t *lsect;
- struct elf_link_hash_entry *h;
- bfd_vma relocation;
- const Elf_Internal_Rela *rel;
- int relative_reloc;
-{
- elf_linker_section_pointers_t *linker_section_ptr;
-
- BFD_ASSERT (lsect != NULL);
-
- if (h != NULL)
- {
- /* Handle global symbol. */
- linker_section_ptr = (_bfd_elf_find_pointer_linker_section
- (h->linker_section_pointer,
- rel->r_addend,
- lsect->which));
-
- BFD_ASSERT (linker_section_ptr != NULL);
-
- if (! elf_hash_table (info)->dynamic_sections_created
- || (info->shared
- && info->symbolic
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
- {
- /* This is actually a static link, or it is a
- -Bsymbolic link and the symbol is defined
- locally. We must initialize this entry in the
- global section.
-
- When doing a dynamic link, we create a .rela.<xxx>
- relocation entry to initialize the value. This
- is done in the finish_dynamic_symbol routine. */
- if (!linker_section_ptr->written_address_p)
- {
- linker_section_ptr->written_address_p = true;
- bfd_put_ptr (output_bfd,
- relocation + linker_section_ptr->addend,
- (lsect->section->contents
- + linker_section_ptr->offset));
- }
- }
- }
- else
- {
- /* Handle local symbol. */
- unsigned long r_symndx = ELF_R_SYM (rel->r_info);
- BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
- BFD_ASSERT (elf_local_ptr_offsets (input_bfd)[r_symndx] != NULL);
- linker_section_ptr = (_bfd_elf_find_pointer_linker_section
- (elf_local_ptr_offsets (input_bfd)[r_symndx],
- rel->r_addend,
- lsect->which));
-
- BFD_ASSERT (linker_section_ptr != NULL);
-
- /* Write out pointer if it hasn't been rewritten out before. */
- if (!linker_section_ptr->written_address_p)
- {
- linker_section_ptr->written_address_p = true;
- bfd_put_ptr (output_bfd, relocation + linker_section_ptr->addend,
- lsect->section->contents + linker_section_ptr->offset);
-
- if (info->shared)
- {
- asection *srel = lsect->rel_section;
- Elf_Internal_Rela *outrel;
- Elf_External_Rela *erel;
- struct elf_backend_data *bed = get_elf_backend_data (output_bfd);
- unsigned int i;
- bfd_size_type amt;
-
- amt = sizeof (Elf_Internal_Rela) * bed->s->int_rels_per_ext_rel;
- outrel = (Elf_Internal_Rela *) bfd_zmalloc (amt);
- if (outrel == NULL)
- {
- (*_bfd_error_handler) (_("Error: out of memory"));
- return 0;
- }
-
- /* We need to generate a relative reloc for the dynamic
- linker. */
- if (!srel)
- {
- srel = bfd_get_section_by_name (elf_hash_table (info)->dynobj,
- lsect->rel_name);
- lsect->rel_section = srel;
- }
-
- BFD_ASSERT (srel != NULL);
-
- for (i = 0; i < bed->s->int_rels_per_ext_rel; i++)
- outrel[i].r_offset = (lsect->section->output_section->vma
- + lsect->section->output_offset
- + linker_section_ptr->offset);
- outrel[0].r_info = ELF_R_INFO (0, relative_reloc);
- outrel[0].r_addend = 0;
- erel = (Elf_External_Rela *) lsect->section->contents;
- erel += elf_section_data (lsect->section)->rel_count;
- elf_swap_reloca_out (output_bfd, outrel, erel);
- ++elf_section_data (lsect->section)->rel_count;
-
- free (outrel);
- }
- }
- }
-
- relocation = (lsect->section->output_offset
- + linker_section_ptr->offset
- - lsect->hole_offset
- - lsect->sym_offset);
-
-#ifdef DEBUG
- fprintf (stderr,
- "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
- lsect->name, (long) relocation, (long) relocation);
-#endif
-
- /* Subtract out the addend, because it will get added back in by the normal
- processing. */
- return relocation - linker_section_ptr->addend;
-}
-
-/* Garbage collect unused sections. */
-
-static boolean elf_gc_mark
- PARAMS ((struct bfd_link_info *info, asection *sec,
- asection * (*gc_mark_hook)
- PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
- struct elf_link_hash_entry *, Elf_Internal_Sym *))));
-
-static boolean elf_gc_sweep
- PARAMS ((struct bfd_link_info *info,
- boolean (*gc_sweep_hook)
- PARAMS ((bfd *abfd, struct bfd_link_info *info, asection *o,
- const Elf_Internal_Rela *relocs))));
-
-static boolean elf_gc_sweep_symbol
- PARAMS ((struct elf_link_hash_entry *h, PTR idxptr));
-
-static boolean elf_gc_allocate_got_offsets
- PARAMS ((struct elf_link_hash_entry *h, PTR offarg));
-
-static boolean elf_gc_propagate_vtable_entries_used
- PARAMS ((struct elf_link_hash_entry *h, PTR dummy));
-
-static boolean elf_gc_smash_unused_vtentry_relocs
- PARAMS ((struct elf_link_hash_entry *h, PTR dummy));
-
-/* The mark phase of garbage collection. For a given section, mark
- it and any sections in this section's group, and all the sections
- which define symbols to which it refers. */
-
-static boolean
-elf_gc_mark (info, sec, gc_mark_hook)
- struct bfd_link_info *info;
- asection *sec;
- asection * (*gc_mark_hook)
- PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
- struct elf_link_hash_entry *, Elf_Internal_Sym *));
-{
- boolean ret;
- asection *group_sec;
-
- sec->gc_mark = 1;
-
- /* Mark all the sections in the group. */
- group_sec = elf_section_data (sec)->next_in_group;
- if (group_sec && !group_sec->gc_mark)
- if (!elf_gc_mark (info, group_sec, gc_mark_hook))
- return false;
-
- /* Look through the section relocs. */
- ret = true;
- if ((sec->flags & SEC_RELOC) != 0 && sec->reloc_count > 0)
- {
- Elf_Internal_Rela *relstart, *rel, *relend;
- Elf_Internal_Shdr *symtab_hdr;
- Elf_Internal_Shdr *shndx_hdr;
- struct elf_link_hash_entry **sym_hashes;
- size_t nlocsyms;
- size_t extsymoff;
- Elf_External_Sym *locsyms, *freesyms = NULL;
- Elf_External_Sym_Shndx *locsym_shndx;
- bfd *input_bfd = sec->owner;
- struct elf_backend_data *bed = get_elf_backend_data (input_bfd);
-
- /* GCFIXME: how to arrange so that relocs and symbols are not
- reread continually? */
-
- symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
- sym_hashes = elf_sym_hashes (input_bfd);
-
- /* Read the local symbols. */
- if (elf_bad_symtab (input_bfd))
- {
- nlocsyms = symtab_hdr->sh_size / sizeof (Elf_External_Sym);
- extsymoff = 0;
- }
- else
- extsymoff = nlocsyms = symtab_hdr->sh_info;
-
- if (symtab_hdr->contents)
- locsyms = (Elf_External_Sym *) symtab_hdr->contents;
- else if (nlocsyms == 0)
- locsyms = NULL;
- else
- {
- bfd_size_type amt = nlocsyms * sizeof (Elf_External_Sym);
- locsyms = freesyms = bfd_malloc (amt);
- if (freesyms == NULL
- || bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0
- || bfd_bread (locsyms, amt, input_bfd) != amt)
- {
- ret = false;
- goto out1;
- }
- }
-
- shndx_hdr = &elf_tdata (input_bfd)->symtab_shndx_hdr;
- locsym_shndx = NULL;
- if (shndx_hdr->sh_size != 0 && nlocsyms != 0)
- {
- bfd_size_type amt = nlocsyms * sizeof (Elf_External_Sym_Shndx);
- locsym_shndx = (Elf_External_Sym_Shndx *) bfd_malloc (amt);
- if (bfd_seek (input_bfd, shndx_hdr->sh_offset, SEEK_SET) != 0
- || bfd_bread (locsym_shndx, amt, input_bfd) != amt)
- return false;
- }
-
- /* Read the relocations. */
- relstart = (NAME(_bfd_elf,link_read_relocs)
- (sec->owner, sec, NULL, (Elf_Internal_Rela *) NULL,
- info->keep_memory));
- if (relstart == NULL)
- {
- ret = false;
- goto out1;
- }
- relend = relstart + sec->reloc_count * bed->s->int_rels_per_ext_rel;
-
- for (rel = relstart; rel < relend; rel++)
- {
- unsigned long r_symndx;
- asection *rsec;
- struct elf_link_hash_entry *h;
- Elf_Internal_Sym s;
-
- r_symndx = ELF_R_SYM (rel->r_info);
- if (r_symndx == 0)
- continue;
-
- if (elf_bad_symtab (sec->owner))
- {
- elf_swap_symbol_in (input_bfd,
- locsyms + r_symndx,
- locsym_shndx + (locsym_shndx ? r_symndx : 0),
- &s);
- if (ELF_ST_BIND (s.st_info) == STB_LOCAL)
- rsec = (*gc_mark_hook) (sec->owner, info, rel, NULL, &s);
- else
- {
- h = sym_hashes[r_symndx - extsymoff];
- rsec = (*gc_mark_hook) (sec->owner, info, rel, h, NULL);
- }
- }
- else if (r_symndx >= nlocsyms)
- {
- h = sym_hashes[r_symndx - extsymoff];
- rsec = (*gc_mark_hook) (sec->owner, info, rel, h, NULL);
- }
- else
- {
- elf_swap_symbol_in (input_bfd,
- locsyms + r_symndx,
- locsym_shndx + (locsym_shndx ? r_symndx : 0),
- &s);
- rsec = (*gc_mark_hook) (sec->owner, info, rel, NULL, &s);
- }
-
- if (rsec && !rsec->gc_mark)
- {
- if (bfd_get_flavour (rsec->owner) != bfd_target_elf_flavour)
- rsec->gc_mark = 1;
- else if (!elf_gc_mark (info, rsec, gc_mark_hook))
- {
- ret = false;
- goto out2;
- }
- }
- }
-
- out2:
- if (!info->keep_memory)
- free (relstart);
- out1:
- if (freesyms)
- free (freesyms);
- }
-
- return ret;
-}
-
-/* The sweep phase of garbage collection. Remove all garbage sections. */
-
-static boolean
-elf_gc_sweep (info, gc_sweep_hook)
- struct bfd_link_info *info;
- boolean (*gc_sweep_hook)
- PARAMS ((bfd *abfd, struct bfd_link_info *info, asection *o,
- const Elf_Internal_Rela *relocs));
-{
- bfd *sub;
-
- for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
- {
- asection *o;
-
- if (bfd_get_flavour (sub) != bfd_target_elf_flavour)
- continue;
-
- for (o = sub->sections; o != NULL; o = o->next)
- {
- /* Keep special sections. Keep .debug sections. */
- if ((o->flags & SEC_LINKER_CREATED)
- || (o->flags & SEC_DEBUGGING))
- o->gc_mark = 1;
-
- if (o->gc_mark)
- continue;
-
- /* Skip sweeping sections already excluded. */
- if (o->flags & SEC_EXCLUDE)
- continue;
-
- /* Since this is early in the link process, it is simple
- to remove a section from the output. */
- o->flags |= SEC_EXCLUDE;
-
- /* But we also have to update some of the relocation
- info we collected before. */
- if (gc_sweep_hook
- && (o->flags & SEC_RELOC) && o->reloc_count > 0)
- {
- Elf_Internal_Rela *internal_relocs;
- boolean r;
-
- internal_relocs = (NAME(_bfd_elf,link_read_relocs)
- (o->owner, o, NULL, NULL, info->keep_memory));
- if (internal_relocs == NULL)
- return false;
-
- r = (*gc_sweep_hook) (o->owner, info, o, internal_relocs);
-
- if (!info->keep_memory)
- free (internal_relocs);
-
- if (!r)
- return false;
- }
- }
- }
-
- /* Remove the symbols that were in the swept sections from the dynamic
- symbol table. GCFIXME: Anyone know how to get them out of the
- static symbol table as well? */
- {
- int i = 0;
-
- elf_link_hash_traverse (elf_hash_table (info),
- elf_gc_sweep_symbol,
- (PTR) &i);
-
- elf_hash_table (info)->dynsymcount = i;
- }
-
- return true;
-}
-
-/* Sweep symbols in swept sections. Called via elf_link_hash_traverse. */
-
-static boolean
-elf_gc_sweep_symbol (h, idxptr)
- struct elf_link_hash_entry *h;
- PTR idxptr;
-{
- int *idx = (int *) idxptr;
-
- if (h->root.type == bfd_link_hash_warning)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
-
- if (h->dynindx != -1
- && ((h->root.type != bfd_link_hash_defined
- && h->root.type != bfd_link_hash_defweak)
- || h->root.u.def.section->gc_mark))
- h->dynindx = (*idx)++;
-
- return true;
-}
-
-/* Propogate collected vtable information. This is called through
- elf_link_hash_traverse. */
-
-static boolean
-elf_gc_propagate_vtable_entries_used (h, okp)
- struct elf_link_hash_entry *h;
- PTR okp;
-{
- if (h->root.type == bfd_link_hash_warning)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
-
- /* Those that are not vtables. */
- if (h->vtable_parent == NULL)
- return true;
-
- /* Those vtables that do not have parents, we cannot merge. */
- if (h->vtable_parent == (struct elf_link_hash_entry *) -1)
- return true;
-
- /* If we've already been done, exit. */
- if (h->vtable_entries_used && h->vtable_entries_used[-1])
- return true;
-
- /* Make sure the parent's table is up to date. */
- elf_gc_propagate_vtable_entries_used (h->vtable_parent, okp);
-
- if (h->vtable_entries_used == NULL)
- {
- /* None of this table's entries were referenced. Re-use the
- parent's table. */
- h->vtable_entries_used = h->vtable_parent->vtable_entries_used;
- h->vtable_entries_size = h->vtable_parent->vtable_entries_size;
- }
- else
- {
- size_t n;
- boolean *cu, *pu;
-
- /* Or the parent's entries into ours. */
- cu = h->vtable_entries_used;
- cu[-1] = true;
- pu = h->vtable_parent->vtable_entries_used;
- if (pu != NULL)
- {
- asection *sec = h->root.u.def.section;
- struct elf_backend_data *bed = get_elf_backend_data (sec->owner);
- int file_align = bed->s->file_align;
-
- n = h->vtable_parent->vtable_entries_size / file_align;
- while (n--)
- {
- if (*pu)
- *cu = true;
- pu++;
- cu++;
- }
- }
- }
-
- return true;
-}
-
-static boolean
-elf_gc_smash_unused_vtentry_relocs (h, okp)
- struct elf_link_hash_entry *h;
- PTR okp;
-{
- asection *sec;
- bfd_vma hstart, hend;
- Elf_Internal_Rela *relstart, *relend, *rel;
- struct elf_backend_data *bed;
- int file_align;
-
- if (h->root.type == bfd_link_hash_warning)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
-
- /* Take care of both those symbols that do not describe vtables as
- well as those that are not loaded. */
- if (h->vtable_parent == NULL)
- return true;
-
- BFD_ASSERT (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak);
-
- sec = h->root.u.def.section;
- hstart = h->root.u.def.value;
- hend = hstart + h->size;
-
- relstart = (NAME(_bfd_elf,link_read_relocs)
- (sec->owner, sec, NULL, (Elf_Internal_Rela *) NULL, true));
- if (!relstart)
- return *(boolean *) okp = false;
- bed = get_elf_backend_data (sec->owner);
- file_align = bed->s->file_align;
-
- relend = relstart + sec->reloc_count * bed->s->int_rels_per_ext_rel;
-
- for (rel = relstart; rel < relend; ++rel)
- if (rel->r_offset >= hstart && rel->r_offset < hend)
- {
- /* If the entry is in use, do nothing. */
- if (h->vtable_entries_used
- && (rel->r_offset - hstart) < h->vtable_entries_size)
- {
- bfd_vma entry = (rel->r_offset - hstart) / file_align;
- if (h->vtable_entries_used[entry])
- continue;
- }
- /* Otherwise, kill it. */
- rel->r_offset = rel->r_info = rel->r_addend = 0;
- }
-
- return true;
-}
-
-/* Do mark and sweep of unused sections. */
-
-boolean
-elf_gc_sections (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
-{
- boolean ok = true;
- bfd *sub;
- asection * (*gc_mark_hook)
- PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
- struct elf_link_hash_entry *h, Elf_Internal_Sym *));
-
- if (!get_elf_backend_data (abfd)->can_gc_sections
- || info->relocateable || info->emitrelocations
- || elf_hash_table (info)->dynamic_sections_created)
- return true;
-
- /* Apply transitive closure to the vtable entry usage info. */
- elf_link_hash_traverse (elf_hash_table (info),
- elf_gc_propagate_vtable_entries_used,
- (PTR) &ok);
- if (!ok)
- return false;
-
- /* Kill the vtable relocations that were not used. */
- elf_link_hash_traverse (elf_hash_table (info),
- elf_gc_smash_unused_vtentry_relocs,
- (PTR) &ok);
- if (!ok)
- return false;
-
- /* Grovel through relocs to find out who stays ... */
-
- gc_mark_hook = get_elf_backend_data (abfd)->gc_mark_hook;
- for (sub = info->input_bfds; sub != NULL; sub = sub->link_next)
- {
- asection *o;
-
- if (bfd_get_flavour (sub) != bfd_target_elf_flavour)
- continue;
-
- for (o = sub->sections; o != NULL; o = o->next)
- {
- if (o->flags & SEC_KEEP)
- if (!elf_gc_mark (info, o, gc_mark_hook))
- return false;
- }
- }
-
- /* ... and mark SEC_EXCLUDE for those that go. */
- if (!elf_gc_sweep (info, get_elf_backend_data (abfd)->gc_sweep_hook))
- return false;
-
- return true;
-}
-
-/* Called from check_relocs to record the existance of a VTINHERIT reloc. */
-
-boolean
-elf_gc_record_vtinherit (abfd, sec, h, offset)
- bfd *abfd;
- asection *sec;
- struct elf_link_hash_entry *h;
- bfd_vma offset;
-{
- struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
- struct elf_link_hash_entry **search, *child;
- bfd_size_type extsymcount;
-
- /* The sh_info field of the symtab header tells us where the
- external symbols start. We don't care about the local symbols at
- this point. */
- extsymcount = elf_tdata (abfd)->symtab_hdr.sh_size/sizeof (Elf_External_Sym);
- if (!elf_bad_symtab (abfd))
- extsymcount -= elf_tdata (abfd)->symtab_hdr.sh_info;
-
- sym_hashes = elf_sym_hashes (abfd);
- sym_hashes_end = sym_hashes + extsymcount;
-
- /* Hunt down the child symbol, which is in this section at the same
- offset as the relocation. */
- for (search = sym_hashes; search != sym_hashes_end; ++search)
- {
- if ((child = *search) != NULL
- && (child->root.type == bfd_link_hash_defined
- || child->root.type == bfd_link_hash_defweak)
- && child->root.u.def.section == sec
- && child->root.u.def.value == offset)
- goto win;
- }
-
- (*_bfd_error_handler) ("%s: %s+%lu: No symbol found for INHERIT",
- bfd_archive_filename (abfd), sec->name,
- (unsigned long) offset);
- bfd_set_error (bfd_error_invalid_operation);
- return false;
-
- win:
- if (!h)
- {
- /* This *should* only be the absolute section. It could potentially
- be that someone has defined a non-global vtable though, which
- would be bad. It isn't worth paging in the local symbols to be
- sure though; that case should simply be handled by the assembler. */
-
- child->vtable_parent = (struct elf_link_hash_entry *) -1;
- }
- else
- child->vtable_parent = h;
-
- return true;
-}
-
-/* Called from check_relocs to record the existance of a VTENTRY reloc. */
-
-boolean
-elf_gc_record_vtentry (abfd, sec, h, addend)
- bfd *abfd ATTRIBUTE_UNUSED;
- asection *sec ATTRIBUTE_UNUSED;
- struct elf_link_hash_entry *h;
- bfd_vma addend;
-{
- struct elf_backend_data *bed = get_elf_backend_data (abfd);
- int file_align = bed->s->file_align;
-
- if (addend >= h->vtable_entries_size)
- {
- size_t size, bytes;
- boolean *ptr = h->vtable_entries_used;
-
- /* While the symbol is undefined, we have to be prepared to handle
- a zero size. */
- if (h->root.type == bfd_link_hash_undefined)
- size = addend;
- else
- {
- size = h->size;
- if (size < addend)
- {
- /* Oops! We've got a reference past the defined end of
- the table. This is probably a bug -- shall we warn? */
- size = addend;
- }
- }
-
- /* Allocate one extra entry for use as a "done" flag for the
- consolidation pass. */
- bytes = (size / file_align + 1) * sizeof (boolean);
-
- if (ptr)
- {
- ptr = bfd_realloc (ptr - 1, (bfd_size_type) bytes);
-
- if (ptr != NULL)
- {
- size_t oldbytes;
-
- oldbytes = ((h->vtable_entries_size / file_align + 1)
- * sizeof (boolean));
- memset (((char *) ptr) + oldbytes, 0, bytes - oldbytes);
- }
- }
- else
- ptr = bfd_zmalloc ((bfd_size_type) bytes);
-
- if (ptr == NULL)
- return false;
-
- /* And arrange for that done flag to be at index -1. */
- h->vtable_entries_used = ptr + 1;
- h->vtable_entries_size = size;
- }
-
- h->vtable_entries_used[addend / file_align] = true;
-
- return true;
-}
-
-/* And an accompanying bit to work out final got entry offsets once
- we're done. Should be called from final_link. */
-
-boolean
-elf_gc_common_finalize_got_offsets (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
-{
- bfd *i;
- struct elf_backend_data *bed = get_elf_backend_data (abfd);
- bfd_vma gotoff;
-
- /* The GOT offset is relative to the .got section, but the GOT header is
- put into the .got.plt section, if the backend uses it. */
- if (bed->want_got_plt)
- gotoff = 0;
- else
- gotoff = bed->got_header_size;
-
- /* Do the local .got entries first. */
- for (i = info->input_bfds; i; i = i->link_next)
- {
- bfd_signed_vma *local_got;
- bfd_size_type j, locsymcount;
- Elf_Internal_Shdr *symtab_hdr;
-
- if (bfd_get_flavour (i) != bfd_target_elf_flavour)
- continue;
-
- local_got = elf_local_got_refcounts (i);
- if (!local_got)
- continue;
-
- symtab_hdr = &elf_tdata (i)->symtab_hdr;
- if (elf_bad_symtab (i))
- locsymcount = symtab_hdr->sh_size / sizeof (Elf_External_Sym);
- else
- locsymcount = symtab_hdr->sh_info;
-
- for (j = 0; j < locsymcount; ++j)
- {
- if (local_got[j] > 0)
- {
- local_got[j] = gotoff;
- gotoff += ARCH_SIZE / 8;
- }
- else
- local_got[j] = (bfd_vma) -1;
- }
- }
-
- /* Then the global .got entries. .plt refcounts are handled by
- adjust_dynamic_symbol */
- elf_link_hash_traverse (elf_hash_table (info),
- elf_gc_allocate_got_offsets,
- (PTR) &gotoff);
- return true;
-}
-
-/* We need a special top-level link routine to convert got reference counts
- to real got offsets. */
-
-static boolean
-elf_gc_allocate_got_offsets (h, offarg)
- struct elf_link_hash_entry *h;
- PTR offarg;
-{
- bfd_vma *off = (bfd_vma *) offarg;
-
- if (h->root.type == bfd_link_hash_warning)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
-
- if (h->got.refcount > 0)
- {
- h->got.offset = off[0];
- off[0] += ARCH_SIZE / 8;
- }
- else
- h->got.offset = (bfd_vma) -1;
-
- return true;
-}
-
-/* Many folk need no more in the way of final link than this, once
- got entry reference counting is enabled. */
-
-boolean
-elf_gc_common_final_link (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
-{
- if (!elf_gc_common_finalize_got_offsets (abfd, info))
- return false;
-
- /* Invoke the regular ELF backend linker to do all the work. */
- return elf_bfd_final_link (abfd, info);
-}
-
-/* This function will be called though elf_link_hash_traverse to store
- all hash value of the exported symbols in an array. */
-
-static boolean
-elf_collect_hash_codes (h, data)
- struct elf_link_hash_entry *h;
- PTR data;
-{
- unsigned long **valuep = (unsigned long **) data;
- const char *name;
- char *p;
- unsigned long ha;
- char *alc = NULL;
-
- if (h->root.type == bfd_link_hash_warning)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
-
- /* Ignore indirect symbols. These are added by the versioning code. */
- if (h->dynindx == -1)
- return true;
-
- name = h->root.root.string;
- p = strchr (name, ELF_VER_CHR);
- if (p != NULL)
- {
- alc = bfd_malloc ((bfd_size_type) (p - name + 1));
- memcpy (alc, name, (size_t) (p - name));
- alc[p - name] = '\0';
- name = alc;
- }
-
- /* Compute the hash value. */
- ha = bfd_elf_hash (name);
-
- /* Store the found hash value in the array given as the argument. */
- *(*valuep)++ = ha;
-
- /* And store it in the struct so that we can put it in the hash table
- later. */
- h->elf_hash_value = ha;
-
- if (alc != NULL)
- free (alc);
-
- return true;
-}
-
-boolean
-elf_reloc_symbol_deleted_p (offset, cookie)
- bfd_vma offset;
- PTR cookie;
-{
- struct elf_reloc_cookie *rcookie = (struct elf_reloc_cookie *) cookie;
-
- if (rcookie->bad_symtab)
- rcookie->rel = rcookie->rels;
-
- for (; rcookie->rel < rcookie->relend; rcookie->rel++)
- {
- unsigned long r_symndx = ELF_R_SYM (rcookie->rel->r_info);
- Elf_Internal_Sym isym;
-
- if (! rcookie->bad_symtab)
- if (rcookie->rel->r_offset > offset)
- return false;
- if (rcookie->rel->r_offset != offset)
- continue;
-
- if (rcookie->locsyms && r_symndx < rcookie->locsymcount)
- {
- Elf_External_Sym *lsym;
- Elf_External_Sym_Shndx *lshndx;
-
- lsym = (Elf_External_Sym *) rcookie->locsyms + r_symndx;
- lshndx = (Elf_External_Sym_Shndx *) rcookie->locsym_shndx;
- if (lshndx != NULL)
- lshndx += r_symndx;
- elf_swap_symbol_in (rcookie->abfd, lsym, lshndx, &isym);
- }
-
- if (r_symndx >= rcookie->locsymcount
- || (rcookie->locsyms
- && ELF_ST_BIND (isym.st_info) != STB_LOCAL))
- {
- struct elf_link_hash_entry *h;
-
- h = rcookie->sym_hashes[r_symndx - rcookie->extsymoff];
-
- while (h->root.type == bfd_link_hash_indirect
- || h->root.type == bfd_link_hash_warning)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
-
- if ((h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
- && elf_discarded_section (h->root.u.def.section))
- return true;
- else
- return false;
- }
- else if (rcookie->locsyms)
- {
- /* It's not a relocation against a global symbol,
- but it could be a relocation against a local
- symbol for a discarded section. */
- asection *isec;
-
- /* Need to: get the symbol; get the section. */
- if (isym.st_shndx < SHN_LORESERVE || isym.st_shndx > SHN_HIRESERVE)
- {
- isec = section_from_elf_index (rcookie->abfd, isym.st_shndx);
- if (isec != NULL && elf_discarded_section (isec))
- return true;
- }
- }
- return false;
- }
- return false;
-}
-
-/* Discard unneeded references to discarded sections.
- Returns true if any section's size was changed. */
-/* This function assumes that the relocations are in sorted order,
- which is true for all known assemblers. */
-
-boolean
-elf_bfd_discard_info (output_bfd, info)
- bfd *output_bfd;
- struct bfd_link_info *info;
-{
- struct elf_reloc_cookie cookie;
- asection *stab, *eh, *ehdr;
- Elf_Internal_Shdr *symtab_hdr;
- Elf_Internal_Shdr *shndx_hdr;
- Elf_External_Sym *freesyms;
- struct elf_backend_data *bed;
- bfd *abfd;
- boolean ret = false;
- boolean strip = info->strip == strip_all || info->strip == strip_debugger;
-
- if (info->relocateable
- || info->traditional_format
- || info->hash->creator->flavour != bfd_target_elf_flavour
- || ! is_elf_hash_table (info))
- return false;
-
- ehdr = NULL;
- if (elf_hash_table (info)->dynobj != NULL)
- ehdr = bfd_get_section_by_name (elf_hash_table (info)->dynobj,
- ".eh_frame_hdr");
-
- for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link_next)
- {
- if (bfd_get_flavour (abfd) != bfd_target_elf_flavour)
- continue;
-
- bed = get_elf_backend_data (abfd);
-
- if ((abfd->flags & DYNAMIC) != 0)
- continue;
-
- eh = NULL;
- if (ehdr)
- {
- eh = bfd_get_section_by_name (abfd, ".eh_frame");
- if (eh && eh->_raw_size == 0)
- eh = NULL;
- }
-
- stab = strip ? NULL : bfd_get_section_by_name (abfd, ".stab");
- if ((! stab
- || elf_section_data(stab)->sec_info_type != ELF_INFO_TYPE_STABS)
- && ! eh
- && (strip || ! bed->elf_backend_discard_info))
- continue;
-
- symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
- shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
-
- cookie.abfd = abfd;
- cookie.sym_hashes = elf_sym_hashes (abfd);
- cookie.bad_symtab = elf_bad_symtab (abfd);
- if (cookie.bad_symtab)
- {
- cookie.locsymcount =
- symtab_hdr->sh_size / sizeof (Elf_External_Sym);
- cookie.extsymoff = 0;
- }
- else
- {
- cookie.locsymcount = symtab_hdr->sh_info;
- cookie.extsymoff = symtab_hdr->sh_info;
- }
-
- freesyms = NULL;
- if (symtab_hdr->contents)
- cookie.locsyms = (void *) symtab_hdr->contents;
- else if (cookie.locsymcount == 0)
- cookie.locsyms = NULL;
- else
- {
- bfd_size_type amt = cookie.locsymcount * sizeof (Elf_External_Sym);
- cookie.locsyms = bfd_malloc (amt);
- if (cookie.locsyms == NULL)
- return false;
- freesyms = cookie.locsyms;
- if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0
- || bfd_bread (cookie.locsyms, amt, abfd) != amt)
- {
- error_ret_free_loc:
- free (cookie.locsyms);
- return false;
- }
- }
-
- cookie.locsym_shndx = NULL;
- if (shndx_hdr->sh_size != 0 && cookie.locsymcount != 0)
- {
- bfd_size_type amt;
- amt = cookie.locsymcount * sizeof (Elf_External_Sym_Shndx);
- cookie.locsym_shndx = bfd_malloc (amt);
- if (cookie.locsym_shndx == NULL)
- goto error_ret_free_loc;
- if (bfd_seek (abfd, shndx_hdr->sh_offset, SEEK_SET) != 0
- || bfd_bread (cookie.locsym_shndx, amt, abfd) != amt)
- {
- free (cookie.locsym_shndx);
- goto error_ret_free_loc;
- }
- }
-
- if (stab)
- {
- cookie.rels = (NAME(_bfd_elf,link_read_relocs)
- (abfd, stab, (PTR) NULL,
- (Elf_Internal_Rela *) NULL,
- info->keep_memory));
- if (cookie.rels)
- {
- cookie.rel = cookie.rels;
- cookie.relend =
- cookie.rels + stab->reloc_count * bed->s->int_rels_per_ext_rel;
- if (_bfd_discard_section_stabs (abfd, stab,
- elf_section_data (stab)->sec_info,
- elf_reloc_symbol_deleted_p,
- &cookie))
- ret = true;
- if (! info->keep_memory)
- free (cookie.rels);
- }
- }
-
- if (eh)
- {
- cookie.rels = NULL;
- cookie.rel = NULL;
- cookie.relend = NULL;
- if (eh->reloc_count)
- cookie.rels = (NAME(_bfd_elf,link_read_relocs)
- (abfd, eh, (PTR) NULL, (Elf_Internal_Rela *) NULL,
- info->keep_memory));
- if (cookie.rels)
- {
- cookie.rel = cookie.rels;
- cookie.relend =
- cookie.rels + eh->reloc_count * bed->s->int_rels_per_ext_rel;
- }
- if (_bfd_elf_discard_section_eh_frame (abfd, info, eh, ehdr,
- elf_reloc_symbol_deleted_p,
- &cookie))
- ret = true;
- if (! info->keep_memory)
- free (cookie.rels);
- }
-
- if (bed->elf_backend_discard_info)
- {
- if (bed->elf_backend_discard_info (abfd, &cookie, info))
- ret = true;
- }
-
- if (cookie.locsym_shndx != NULL)
- free (cookie.locsym_shndx);
-
- if (freesyms != NULL)
- free (freesyms);
- }
-
- if (ehdr && _bfd_elf_discard_section_eh_frame_hdr (output_bfd, info, ehdr))
- ret = true;
- return ret;
-}
-
-static boolean
-elf_section_ignore_discarded_relocs (sec)
- asection *sec;
-{
- struct elf_backend_data *bed;
-
- switch (elf_section_data (sec)->sec_info_type)
- {
- case ELF_INFO_TYPE_STABS:
- case ELF_INFO_TYPE_EH_FRAME:
- return true;
- default:
- break;
- }
-
- bed = get_elf_backend_data (sec->owner);
- if (bed->elf_backend_ignore_discarded_relocs != NULL
- && (*bed->elf_backend_ignore_discarded_relocs) (sec))
- return true;
-
- return false;
-}