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2020-01-20Don't touch r11 in __tls_get_addr stubAlan Modra1-6/+6
This modifies the special __tls_get_addr stub that checks for a tlsdesc style __tls_index entry and returns early. Not using r11 isn't much benefit at the moment but a followup patch will preserve regs around the first call to __tls_get_addr when the __tls_index entry isn't yet set up for an early return. bfd/ * elf64-ppc.c (LD_R11_0R3, CMPDI_R11_0, STD_R11_0R1, LD_R11_0R1), (MTLR_R11): Don't define. (LD_R0_0R3, CMPDI_R0_0): Define. (build_tls_get_addr_stub): Don't use r11 in stub. ld/ * testsuite/ld-powerpc/tlsexe.d: Match new __tls_get_addr stub. * testsuite/ld-powerpc/tlsexeno.d: Likewise. * testsuite/ld-powerpc/tlsexetoc.d: Likewise. * testsuite/ld-powerpc/tlsexetocno.d: Likewise. * testsuite/ld-powerpc/tlsopt5.d: Likewise.
2018-06-08Define various symbols conditionally in shared librariesAlan Modra1-2/+2
The values of symbols in shared libraries like _end, _edata, and __bss_start are generally not that useful outside of the shared library. This patch defines them conditionally with PROVIDE, since a shared library might need the local value. An example is glibc ld.so local access to "_begin", "_etext" and "_end". (ld.so gains access to the local values by making the references using hidden visibility. That makes the definitions hidden too.) We can't use PROVIDE_HIDDEN in the linker scripts because the shared library might need the value of the symbol in the executable. An example is freebsd libc dynamic access to "_end". PR ld/23161 * emulparams/aarch64cloudabi.sh: PROVIDE __bss_start__, _bss_end__, and __end__ in shared libraries. * emulparams/aarch64fbsd.sh: Likewise. * emulparams/aarch64linux.sh: Likewise. * emulparams/aarch64linux32.sh: Likewise. * emulparams/armelf_fuchsia.sh: Likewise. * emulparams/armelf_linux.sh: Likewise. * emulparams/armelf_phoenix.sh: Likewise. * emulparams/aarch64elf.sh: Likewise, and __data_start * emulparams/aarch64elf32.sh: Likewise. * emulparams/armelf.sh: Likewise. * emulparams/armnto.sh: Likewise. * emulparams/elf32bmip.sh: Remove duplicate ". = ." from OTHER_GOT_SYMBOLS. PROVIDE _ftext, _fdata, and _fbss in shared libs. * emulparams/elf32bmipn32-defs.sh: Likewise. * emulparams/elf32frv.sh: PROVIDE __end and __data_start in shared libs. * emulparams/elf32lriscv-defs.sh: Tidy. * emulparams/elf32mcore.sh: PROVIDE __bss_start and _bss_end in shared libs * emulparams/elf32ppccommon.sh: PROVIDE __end in shared libs. * emulparams/elf32rl78.sh: Tidy. * emulparams/i386nto.sh: PROVIDE _btext in shared libs. * emulparams/shelf_nto.sh: Likewise. * emulparams/shlelf_nto.sh: Likewise. * emulparams/score3_elf.sh: PROVIDE _gp, _bss_start__, _bss_end__, __bss_end__, __end__, _fdata, _sdata_begin, and _bss_start in shared libs. * scripttempl/elf.sc: Don't use EXECUTABLE_SYMBOLS for shared libraries. PROVIDE _edata, edata, __bss_start, and _end in shared libraries. * testsuite/ld-elf/pr23161.map, * testsuite/ld-elf/pr23161a.c, * testsuite/ld-elf/pr23161b.c, * testsuite/ld-elf/pr23161c.c, * testsuite/ld-elf/pr23161a.rd, * testsuite/ld-elf/pr23161b.rd, * testsuite/ld-elf/pr23161c.rd, * testsuite/ld-elf/pr23161d.rd: New tests. * testsuite/ld-elf/shared.exp: Run ld/23161 tests. * testsuite/ld-elf/pr23162.rd, * testsuite/ld-aarch64/ifunc-1-local.d, * testsuite/ld-aarch64/ifunc-1.d, * testsuite/ld-aarch64/ifunc-2-local.d, * testsuite/ld-aarch64/ifunc-2.d, * testsuite/ld-aarch64/ifunc-21.d, * testsuite/ld-aarch64/ifunc-3a.d, * testsuite/ld-alpha/tlsbin.rd, * testsuite/ld-alpha/tlsbin.sd, * testsuite/ld-alpha/tlsbinr.rd, * testsuite/ld-alpha/tlspic.rd, * testsuite/ld-alpha/tlspic.sd, * testsuite/ld-cris/dso-pltdis1.d, * testsuite/ld-cris/dso-pltdis2.d, * testsuite/ld-cris/dso12-pltdis.d, * testsuite/ld-cris/gotplt1.d, * testsuite/ld-cris/gotplt2.d, * testsuite/ld-cris/gotplt3.d, * testsuite/ld-cris/hiddef1.d, * testsuite/ld-cris/libdso-1.d, * testsuite/ld-cris/libdso-10.d, * testsuite/ld-cris/libdso-11.d, * testsuite/ld-cris/libdso-12.d, * testsuite/ld-cris/libdso-12b.d, * testsuite/ld-cris/libdso-12c.d, * testsuite/ld-cris/libdso-13.d, * testsuite/ld-cris/libdso-13b.d, * testsuite/ld-cris/libdso-14.d, * testsuite/ld-cris/libdso-15.d, * testsuite/ld-cris/libdso-15b.d, * testsuite/ld-cris/libdso-1c.d, * testsuite/ld-cris/libdso-1d.d, * testsuite/ld-cris/libdso-2.d, * testsuite/ld-cris/pic-gc-72.d, * testsuite/ld-cris/pic-gc-73.d, * testsuite/ld-cris/pr16044.d, * testsuite/ld-cris/pv32-1.d, * testsuite/ld-cris/tls-dso-dtpoffd2.d, * testsuite/ld-cris/tls-dso-dtpoffd4.d, * testsuite/ld-cris/tls-dso-tpoffgotcomm1.d, * testsuite/ld-cris/tls-gc-71.d, * testsuite/ld-cris/tls-gd-1.d, * testsuite/ld-cris/tls-gd-1h.d, * testsuite/ld-cris/tls-gd-2.d, * testsuite/ld-cris/tls-gd-2h.d, * testsuite/ld-cris/tls-ie-10.d, * testsuite/ld-cris/tls-ie-11.d, * testsuite/ld-cris/tls-ie-78.d, * testsuite/ld-cris/tls-ie-8.d, * testsuite/ld-cris/tls-ie-9.d, * testsuite/ld-cris/tls-js1.d, * testsuite/ld-cris/tls-ld-4.d, * testsuite/ld-cris/tls-ld-5.d, * testsuite/ld-cris/tls-ld-6.d, * testsuite/ld-cris/tls-ld-7.d, * testsuite/ld-cris/tls-ldgd-14.d, * testsuite/ld-cris/tls-ldgd-15.d, * testsuite/ld-cris/tls-ldgdex-14.d, * testsuite/ld-cris/tls-ldgdex-15.d, * testsuite/ld-cris/tls-ldgdx-14.d, * testsuite/ld-cris/tls-ldgdx-15.d, * testsuite/ld-cris/tls-legdx-16.d, * testsuite/ld-cris/tls-legdx-17.d, * testsuite/ld-cris/tls-local-54.d, * testsuite/ld-cris/tls-local-60.d, * testsuite/ld-cris/tls-local-61.d, * testsuite/ld-cris/tls-local-63.d, * testsuite/ld-cris/tls-local-64.d, * testsuite/ld-cris/tls-ok-30.d, * testsuite/ld-cris/tls-ok-32.d, * testsuite/ld-cris/tls-ok-34.d, * testsuite/ld-cris/tls-und-38.d, * testsuite/ld-cris/tls-und-42.d, * testsuite/ld-cris/tls-und-46.d, * testsuite/ld-cris/tls-und-50.d, * testsuite/ld-cris/weakhiddso.d, * testsuite/ld-cris/weakref2.d, * testsuite/ld-frv/fdpic-shared-1.d, * testsuite/ld-frv/fdpic-shared-2.d, * testsuite/ld-frv/fdpic-shared-3.d, * testsuite/ld-frv/fdpic-shared-4.d, * testsuite/ld-frv/fdpic-shared-5.d, * testsuite/ld-frv/fdpic-shared-7.d, * testsuite/ld-frv/fdpic-shared-8.d, * testsuite/ld-frv/tls-dynamic-2.d, * testsuite/ld-i386/ibt-plt-1.d, * testsuite/ld-i386/ibt-plt-2a.d, * testsuite/ld-i386/ibt-plt-2b.d, * testsuite/ld-i386/ibt-plt-2c.d, * testsuite/ld-i386/ibt-plt-2d.d, * testsuite/ld-i386/ibt-plt-3a.d, * testsuite/ld-i386/ibt-plt-3b.d, * testsuite/ld-i386/ibt-plt-3c.d, * testsuite/ld-i386/ibt-plt-3d.d, * testsuite/ld-i386/plt2.dd, * testsuite/ld-i386/pr20830.d, * testsuite/ld-i386/tlsbin-nacl.rd, * testsuite/ld-i386/tlsbin.rd, * testsuite/ld-i386/tlsbin2-nacl.rd, * testsuite/ld-i386/tlsbin2.rd, * testsuite/ld-i386/tlsbindesc-nacl.rd, * testsuite/ld-i386/tlsbindesc.rd, * testsuite/ld-i386/tlsdesc-nacl.rd, * testsuite/ld-i386/tlsdesc.rd, * testsuite/ld-i386/tlsgdesc-nacl.rd, * testsuite/ld-i386/tlsgdesc.rd, * testsuite/ld-i386/tlsnopic-nacl.rd, * testsuite/ld-i386/tlsnopic.dd, * testsuite/ld-i386/tlsnopic.rd, * testsuite/ld-i386/tlsnopic.sd, * testsuite/ld-i386/tlspic-nacl.rd, * testsuite/ld-i386/tlspic.rd, * testsuite/ld-i386/tlspic2-nacl.rd, * testsuite/ld-i386/tlspic2.rd, * testsuite/ld-ia64/merge1.d, * testsuite/ld-ia64/merge2.d, * testsuite/ld-ia64/merge3.d, * testsuite/ld-ia64/merge4.d, * testsuite/ld-ia64/merge5.d, * testsuite/ld-ia64/tlsbin.rd, * testsuite/ld-ia64/tlspic.rd, * testsuite/ld-ifunc/ifunc-2-i386-now.d, * testsuite/ld-ifunc/ifunc-2-local-i386-now.d, * testsuite/ld-ifunc/ifunc-2-local-x86-64-now.d, * testsuite/ld-ifunc/ifunc-2-local-x86-64.d, * testsuite/ld-ifunc/ifunc-2-x86-64-now.d, * testsuite/ld-ifunc/ifunc-2-x86-64.d, * testsuite/ld-ifunc/pr17154-i386-now.d, * testsuite/ld-ifunc/pr17154-i386.d, * testsuite/ld-ifunc/pr17154-x86-64-now.d, * testsuite/ld-ifunc/pr17154-x86-64.d, * testsuite/ld-m68k/tls-def-1.d, * testsuite/ld-m68k/tls-gd-1.d2, * testsuite/ld-metag/shared.d, * testsuite/ld-metag/stub_pic_app.d, * testsuite/ld-mips-elf/rel32-n32.d, * testsuite/ld-mips-elf/rel32-o32.d, * testsuite/ld-mips-elf/rel64.d, * testsuite/ld-powerpc/ambiguousv1.d, * testsuite/ld-powerpc/ambiguousv1b.d, * testsuite/ld-powerpc/ambiguousv2.d, * testsuite/ld-powerpc/ambiguousv2b.d, * testsuite/ld-powerpc/tlsexe.d, * testsuite/ld-powerpc/tlsexe.r, * testsuite/ld-powerpc/tlsexe32.d, * testsuite/ld-powerpc/tlsexe32.g, * testsuite/ld-powerpc/tlsexe32.r, * testsuite/ld-powerpc/tlsexetoc.d, * testsuite/ld-powerpc/tlsexetoc.r, * testsuite/ld-powerpc/tlsso.d, * testsuite/ld-powerpc/tlsso.r, * testsuite/ld-powerpc/tlsso32.g, * testsuite/ld-powerpc/tlsso32.r, * testsuite/ld-powerpc/tlstocso.d, * testsuite/ld-powerpc/tlstocso.g, * testsuite/ld-powerpc/tlstocso.r, * testsuite/ld-s390/gotreloc_31-1.dd, * testsuite/ld-s390/tlsbin.dd, * testsuite/ld-s390/tlsbin.rd, * testsuite/ld-s390/tlsbin_64.dd, * testsuite/ld-s390/tlsbin_64.rd, * testsuite/ld-s390/tlspic.rd, * testsuite/ld-s390/tlspic_64.rd, * testsuite/ld-sh/tlsbin-2.d, * testsuite/ld-sh/tlspic-2.d, * testsuite/ld-sparc/gotop32.rd, * testsuite/ld-sparc/gotop64.rd, * testsuite/ld-sparc/tlssunbin32.rd, * testsuite/ld-sparc/tlssunbin64.rd, * testsuite/ld-sparc/tlssunnopic32.rd, * testsuite/ld-sparc/tlssunnopic64.rd, * testsuite/ld-sparc/tlssunpic32.rd, * testsuite/ld-sparc/tlssunpic64.rd, * testsuite/ld-x86-64/bnd-branch-1-now.d, * testsuite/ld-x86-64/bnd-ifunc-1-now.d, * testsuite/ld-x86-64/bnd-ifunc-2-now.d, * testsuite/ld-x86-64/bnd-ifunc-2.d, * testsuite/ld-x86-64/bnd-plt-1-now.d, * testsuite/ld-x86-64/bnd-plt-1.d, * testsuite/ld-x86-64/ibt-plt-1-x32.d, * testsuite/ld-x86-64/ibt-plt-1.d, * testsuite/ld-x86-64/ibt-plt-2a-x32.d, * testsuite/ld-x86-64/ibt-plt-2a.d, * testsuite/ld-x86-64/ibt-plt-2b-x32.d, * testsuite/ld-x86-64/ibt-plt-2b.d, * testsuite/ld-x86-64/ibt-plt-2c-x32.d, * testsuite/ld-x86-64/ibt-plt-2c.d, * testsuite/ld-x86-64/ibt-plt-2d-x32.d, * testsuite/ld-x86-64/ibt-plt-2d.d, * testsuite/ld-x86-64/ibt-plt-3a-x32.d, * testsuite/ld-x86-64/ibt-plt-3a.d, * testsuite/ld-x86-64/ibt-plt-3b-x32.d, * testsuite/ld-x86-64/ibt-plt-3b.d, * testsuite/ld-x86-64/ibt-plt-3c-x32.d, * testsuite/ld-x86-64/ibt-plt-3c.d, * testsuite/ld-x86-64/ibt-plt-3d-x32.d, * testsuite/ld-x86-64/ibt-plt-3d.d, * testsuite/ld-x86-64/ilp32-4-nacl.d, * testsuite/ld-x86-64/ilp32-4.d, * testsuite/ld-x86-64/load1c-nacl.d, * testsuite/ld-x86-64/load1c.d, * testsuite/ld-x86-64/load1d-nacl.d, * testsuite/ld-x86-64/load1d.d, * testsuite/ld-x86-64/mpx3n.dd, * testsuite/ld-x86-64/mpx4.dd, * testsuite/ld-x86-64/mpx4n.dd, * testsuite/ld-x86-64/plt2.dd, * testsuite/ld-x86-64/pr14207.d, * testsuite/ld-x86-64/pr19162.d, * testsuite/ld-x86-64/pr20253-1f.d, * testsuite/ld-x86-64/pr20253-1l.d, * testsuite/ld-x86-64/pr20830a-now.d, * testsuite/ld-x86-64/pr20830a.d, * testsuite/ld-x86-64/pr20830b-now.d, * testsuite/ld-x86-64/pr20830b.d, * testsuite/ld-x86-64/pr21038a-now.d, * testsuite/ld-x86-64/pr21038a.d, * testsuite/ld-x86-64/pr21038b-now.d, * testsuite/ld-x86-64/pr21038b.d, * testsuite/ld-x86-64/pr21038c-now.d, * testsuite/ld-x86-64/pr21038c.d, * testsuite/ld-x86-64/tlsbin-nacl.rd, * testsuite/ld-x86-64/tlsbin.rd, * testsuite/ld-x86-64/tlsbin2-nacl.rd, * testsuite/ld-x86-64/tlsbin2.rd, * testsuite/ld-x86-64/tlsbindesc-nacl.rd, * testsuite/ld-x86-64/tlsbindesc.rd, * testsuite/ld-x86-64/tlsdesc-nacl.rd, * testsuite/ld-x86-64/tlsdesc.rd, * testsuite/ld-x86-64/tlsgdesc-nacl.rd, * testsuite/ld-x86-64/tlsgdesc.rd, * testsuite/ld-x86-64/tlspic-nacl.rd, * testsuite/ld-x86-64/tlspic.rd, * testsuite/ld-x86-64/tlspic2-nacl.rd, * testsuite/ld-x86-64/tlspic2.rd: Update.
2018-01-17PowerPC PLT stub tidyAlan Modra1-4/+1
This is in preparation for the next patch adding Spectre variant 2 mitigation for PowerPC and PowerPC64. Besides tidying code involved in stub output (to reduce the number of places where bctr is output), the patch adds some user visible features: 1) PowerPC64 ELFv2 global entry stubs now are aligned under the control of --plt-align, with a default alignment of 32 bytes. 2) PowerPC64 __glink_PLTresolve is no longer padded out with nops. 3) PowerPC32 PLT stubs are aligned under the control of --plt-align, with the default alignment being 16 bytes as before. 4) The PowerPC32 branch/nop table emitted before __glink_PLTresolve is now smaller in many cases. It was sized incorrectly when the __tls_get_addr_opt stub was used, and unnecessarily included space for local ifuncs. bfd/ * elf32-ppc.c (GLINK_ENTRY_SIZE): Add parameters, handle __tls_get_addr_opt, and alignment sizing. (TLS_GET_ADDR_GLINK_SIZE): Delete. (is_nonpic_glink_stub): Don't use GLINK_ENTRY_SIZE. (ppc_elf_get_synthetic_symtab): Recognize stubs spaced at 4, 6, or 8 insns. (ppc_elf_link_hash_table_create): Init new ppc_elf_params field. (allocate_dynrelocs): Use new GLINK_ENTRY_SIZE. (ppc_elf_size_dynamic_sections): Likewise. Size branch table by PLT reloc count. (write_glink_stub): Handle __tls_get_addr_opt stub. Pad out to size given by GLINK_ENTRY_SIZE. (ppc_elf_relocate_section): Adjust write_glink_stub call. (ppc_elf_finish_dynamic_symbol): Likewise. (ppc_elf_finish_dynamic_sections): Write PLTresolve without using insn array since so many need rewriting. * elf32-ppc.h (struct ppc_elf_params): Add plt_stub_align. * elf64-ppc.c (GLINK_PLTRESOLVE_SIZE): Rename from GLINK_CALL_STUB_SIZE. Add htab param and evaluate to size without nops. Adjust all uses. (ppc64_elf_get_synthetic_symtab): Don't use GLINK_CALL_STUB_SIZE in glink_vma calculation. (struct ppc_link_hash_table): Add global_entry section pointer. (create_linkage_sections): Create separate section for global entry stubs. (PPC_LO, PPC_HI, PPC_HA): Move earlier. (size_global_entry_stubs): Handle sizing for aligned stubs. (ppc64_elf_size_dynamic_sections): Handle global_entry alloc, and don't stash end of glink branch table in rawsize. (ppc_build_one_stub): Rewrite stub size calculations. (build_global_entry_stubs): Use new section. (ppc64_elf_build_stubs): Don't pad __glink_PLTresolve with nops. Build lazy link stubs out to end of section. Build global entry stubs in new section. gold/ * options.h (plt_align): Support for PowerPC32 too. * powerpc.cc (Stub_table::stub_align): Heed --plt-align for 32-bit. (Stub_table::plt_call_size, branch_stub_size): Tidy. (Stub_table::plt_call_align): Implement using stub_align. (Output_data_glink::global_entry_align): New function. (Output_data_glink::global_entry_off): New function. (Output_data_glink::global_entry_address): Use global_entry_off. (Output_data_glink::pltresolve_size): New function, replacing pltresolve_size_ constant. Update all uses. (Output_data_glink::add_global_entry): Align offset. (Output_data_glink::set_final_data_size): Use global_entry_align. (Stub_table::do_write): Don't pad __glink_PLTrelsolve with nops. Tidy stub output. Use global_entry_off. ld/ * emultempl/ppc32elf.em (params): Init new field. (enum ppc32_opt): New enum to define OPTION_* values. Add OPTION_PLT_ALIGN and OPTION_NO_PLT_ALIGN. (PARSE_AND_LIST_LONGOPTS): Handle new options. (PARSE_AND_LIST_ARGS_CASES): Likewise. (PARSE_AND_LIST_OPTIONS): Likewise. Break up help output. * emultempl/ppc64elf.em (ppc_add_stub_section): Init alignment correctly for negative --plt-stub-align. * testsuite/ld-powerpc/elfv2exe.d, * testsuite/ld-powerpc/elfv2so.d, * testsuite/ld-powerpc/relbrlt.d, * testsuite/ld-powerpc/relbrlt.s, * testsuite/ld-powerpc/tlsexe.d, * testsuite/ld-powerpc/tlsexe.r, * testsuite/ld-powerpc/tlsexe32.d, * testsuite/ld-powerpc/tlsexe32.g, * testsuite/ld-powerpc/tlsexe32.r, * testsuite/ld-powerpc/tlsexetoc.d, * testsuite/ld-powerpc/tlsexetoc.r, * testsuite/ld-powerpc/tlsopt5_32.d, * testsuite/ld-powerpc/tlsso.d, * testsuite/ld-powerpc/tlstocso.d: Update for changed stub order.
2017-08-30PowerPC TPREL16_HA/LO reloc optimizationAlan Modra1-16/+16
In the TLS GD/LD to LE optimization, ld replaces a sequence like addi 3,2,x@got@tlsgd R_PPC64_GOT_TLSGD16 x bl __tls_get_addr(x@tlsgd) R_PPC64_TLSGD x R_PPC64_REL24 __tls_get_addr nop with addis 3,13,x@tprel@ha R_PPC64_TPREL16_HA x addi 3,3,x@tprel@l R_PPC64_TPREL16_LO x nop When the tprel offset is small, this can be further optimized to nop addi 3,13,x@tprel nop bfd/ * elf64-ppc.c (struct ppc_link_hash_table): Add do_tls_opt. (ppc64_elf_tls_optimize): Set it. (ppc64_elf_relocate_section): Nop addis on TPREL16_HA, and convert insn on TPREL16_LO and TPREL16_LO_DS relocs to use r13 when addis would add zero. * elf32-ppc.c (struct ppc_elf_link_hash_table): Add do_tls_opt. (ppc_elf_tls_optimize): Set it. (ppc_elf_relocate_section): Nop addis on TPREL16_HA, and convert insn on TPREL16_LO relocs to use r2 when addis would add zero. gold/ * powerpc.cc (Target_powerpc::Relocate::relocate): Nop addis on TPREL16_HA, and convert insn on TPREL16_LO and TPREL16_LO_DS relocs to use r2/r13 when addis would add zero. ld/ * testsuite/ld-powerpc/tls.s: Add calls with tls markers. * testsuite/ld-powerpc/tls32.s: Likewise. * testsuite/ld-powerpc/powerpc.exp: Run tls marker tests. * testsuite/ld-powerpc/tls.d: Adjust for TPREL16_HA/LO optimization. * testsuite/ld-powerpc/tlsexe.d: Likewise. * testsuite/ld-powerpc/tlsexetoc.d: Likewise. * testsuite/ld-powerpc/tlsld.d: Likewise. * testsuite/ld-powerpc/tlsmark.d: Likewise. * testsuite/ld-powerpc/tlsopt4.d: Likewise. * testsuite/ld-powerpc/tlstoc.d: Likewise.
2017-08-30PowerPC64 __tls_get_addr sequence optimizationAlan Modra1-5/+5
There isn't a good reason for ld.bfd to behave differently from gold in the code generated by TLS GD/LD to LE optimization. bfd/ * elf64-ppc.c (ppc64_elf_relocate_section): When optimizing __tls_get_addr call sequences to LE, don't move the addi down to the nop. Replace the bl with addi and leave the nop alone. ld/ * testsuite/ld-powerpc/tls.d: Update. * testsuite/ld-powerpc/tlsexe.d: Update. * testsuite/ld-powerpc/tlsexetoc.d: Update. * testsuite/ld-powerpc/tlsld.d: Update. * testsuite/ld-powerpc/tlsmark.d: Update. * testsuite/ld-powerpc/tlsopt4.d: Update. * testsuite/ld-powerpc/tlstoc.d: Update.
2017-01-24PowerPC dynamic relocationsAlan Modra1-2/+2
This patch fixes a number of issues with powerpc dynamic relocations. 1) Both ppc and ppc64 were emitting more dynamic symbols and relocations than necessary, due to not supporting static linker resolution of tls_index entries for __tls_get_addr_opt. This meant that any @got@tlsgd or @got@tlsld reloc needed to make their symbols dynamic and generate dptmod and dtprel relocs for the dynamic linker. That would have been passable, but what happened was that practically all @got relocations resulted in their symbols being made dynamic and dynamic relocations emitted against the GOT entries. (Mostly visible on ppc32 executables since ppc64 gcc really only uses @got style relocs for TLS.) 2) The PowerOpen syntax was not supported with __tls_get_addr_opt. DTPMOD/DTPREL relocs on tls_index TOC entries did not use the trick of forcing dynamic symbols and relocations so those entries always resulted in the full __tls_get_addr processing. gcc doesn't use the PowerOpen syntax for TLS, and normally such code would be optimized to TLS IE or LE so the impact of missing this support was minimal. 3) In an executable, relocations against GNU indirect functions always used the value of their PLT stub. While this is correct, it is better in some cases to use a dynamic relocation. An extra dynamic relocation can mean that calls via function pointers need not bounce through the PLT stub at runtime. The patch also tidies the PLT handling code in ppc32 allocate_dynrelocs. Allocating PLT entries after other dynamic relocs allows the PLT loop to omit special handling for undefined weak symbols, and that in turn allows the loop to be simplified. bfd/ * elf32-ppc.c (ppc_elf_adjust_dynamic_symbol): Merge two cases where dynamic relocs are preferable. Allow ifunc too. (ensure_undefweak_dynamic): New function. (allocate_dynrelocs): Use it here. Move plt handling last and don't make symbols dynamic, simplifying loop. Only make undef weak symbols with GOT entries dynamic. Correct condition for GOT relocs. Handle dynamic relocs on ifuncs. Correct comments. Remove goto. (ppc_elf_relocate_section): Correct test for using dynamic symbol on GOT relocs. Rearrange test for emitting GOT relocs to suit. Set up explicit tls_index entries and implicit GOT tls_index entries resolvable at link time for __tls_get_addr_opt. Simplify test to clear mem for prelink. * elf64-ppc.c (allocate_got): Correct condition for GOT relocs. (ensure_undefweak_dynamic): New function. (allocate_dynrelocs): Use it here. Only make undef weak symbols with GOT entries dynamic. Remove unnecessary test of WILL_CALL_FINISH_DYNAMIC_SYMBOL in PLT handling. (ppc64_elf_relocate_section): Correct test for using dynamic symbol on GOT relocs. Rearrange test for emitting GOT relocs to suit. Set up explicit tls_index entries and implicit GOT tls_index entries resolvable at link time for __tls_get_addr_opt. Simplify expression to clear mem for prelink. ld/ * testsuite/ld-powerpc/tlsexe.r: Update for fewer dynamic relocs and symbols. * testsuite/ld-powerpc/tlsexe.d: Likewise. * testsuite/ld-powerpc/tlsexe.g: Likewise.
2015-04-23Align .TOC. for PowerPC64Alan Modra1-2/+2
This change, with prerequisite 0e5fabeb, provides a toc base aligned to 256 bytes rather than 8 bytes. This is necessary for a minor gcc optimisation, allowing use of d-form instructions to correctly access toc-relative items larger than 8 bytes. bfd/ * elf64-ppc.c (TOC_BASE_ALIGN): Define. (ppc64_elf_next_toc_section): Align multi-got toc base. (ppc64_elf_set_toc): Likewise initial toc base and .TOC. symbol. ld/ * emulparams/elf64ppc.sh (GOT): Align. ld/testsuite/ * ld-powerpc/ambiguousv1b.d: Update for aligned .got. * ld-powerpc/defsym.d: Likewise. * ld-powerpc/elfv2-2exe.d: Likewise. * ld-powerpc/elfv2exe.d: Likewise. * ld-powerpc/elfv2so.d: Likewise. * ld-powerpc/relbrlt.d: Likewise. * ld-powerpc/tls.g: Likewise. * ld-powerpc/tlsexe.d: Likewise. * ld-powerpc/tlsexe.g: Likewise. * ld-powerpc/tlsexe.r: Likewise. * ld-powerpc/tlsexetoc.d: Likewise. * ld-powerpc/tlsexetoc.g: Likewise. * ld-powerpc/tlsexetoc.r: Likewise. * ld-powerpc/tlsso.d: Likewise. * ld-powerpc/tlsso.g: Likewise. * ld-powerpc/tlsso.r: Likewise. * ld-powerpc/tlstoc.g: Likewise. * ld-powerpc/tlstocso.d: Likewise. * ld-powerpc/tlstocso.g: Likewise. * ld-powerpc/tlstocso.r: Likewise. * ld-powerpc/tocopt.d: Likewise. * ld-powerpc/tocopt2.d: Likewise. * ld-powerpc/tocopt3.d: Likewise. * ld-powerpc/tocopt4.d: Likewise. * ld-powerpc/tocopt5.d: Likewise.
2015-03-11Fix ppc32 synthetic symbols when __tls_get_addr_opt stub is generatedAlan Modra1-1/+1
Also update the 32-bit tls testcases to be secure plt. bfd/ * elf32-ppc.c (ppc_elf_get_synthetic_symtab): Examine stubs in reverse order. Account for larger size of __tls_get_addr_opt stub. ld/testsuite/ * ld-powerpc/tls32.s: Add GOT pointer setup. * ld-powerpc/tls32.d: Update. * ld-powerpc/tls32.g: Update. * ld-powerpc/tls32.t: Update. * ld-powerpc/tlsexe.d: Update. * ld-powerpc/tlsexe32.d: Update. * ld-powerpc/tlsexe32.g: Update. * ld-powerpc/tlsexe32.r: Update. * ld-powerpc/tlsexetoc.d: Update. * ld-powerpc/tlsso32.d: Update. * ld-powerpc/tlsso32.g: Update. * ld-powerpc/tlsso32.r: Update.
2013-10-30Change plt stubs to have destination in r12.Alan Modra1-11/+12
This change is to support the new ELFv2 ABI, which uses the value in r12 on function entry to calculate the got/toc pointer. bfd/ * elf64-ppc.c (build_plt_stub): Switch stubs to use r11 as base reg and r12 as destination. (ppc_build_one_stub): Likewise. (ppc64_elf_build_stubs): Likewise for glink. ld/testsuite/ * ld-powerpc/tls.s: Add proper .opd entry for _start. * ld-powerpc/tlstoc.s: Likewise. * ld-powerpc/relbrlt.d: Update for changed stubs. * ld-powerpc/tls.d: Update for changed stubs and _start .opd entry. * ld-powerpc/tls.g: Likewise. * ld-powerpc/tlsexe.d: Likewise. * ld-powerpc/tlsexe.g: Likewise. * ld-powerpc/tlsexe.r: Likewise. * ld-powerpc/tlsexetoc.d: Likewise. * ld-powerpc/tlsexetoc.g: Likewise. * ld-powerpc/tlsexetoc.r: Likewise. * ld-powerpc/tlsso.d: Likewise. * ld-powerpc/tlsso.g: Likewise. * ld-powerpc/tlsso.r: Likewise. * ld-powerpc/tlstoc.d: Likewise. * ld-powerpc/tlstoc.g: Likewise. * ld-powerpc/tlstocso.d: Likewise. * ld-powerpc/tlstocso.g: Likewise. * ld-powerpc/tlstocso.r: Likewise.
2013-04-22bfd/Alan Modra1-1/+1
* elf64-ppc.c (ppc64_elf_check_relocs): Don't call create_linkage_sections here.. (ppc64_elf_init_stub_bfd): ..do so here. Return status. (create_linkage_sections): Move earlier in file. (ppc64_elf_setup_section_lists): Remove now useless htab->brlt test. * elf64-ppc.h (ppc64_elf_init_stub_bfd): Update proto. ld/ * emultempl/ppc64elf.em (ppc_create_output_section_statements): Check return from ppc64_elf_init_stub_bfd. ld/testsuite/ * ld-powerpc/tlsexe.d: Adjust. * ld-powerpc/tlsexe.r: Adjust. * ld-powerpc/tlsexetoc.d: Adjust. * ld-powerpc/tlsexetoc.r: Adjust. * ld-powerpc/tlsso.d: Adjust. * ld-powerpc/tlsso.r: Adjust. * ld-powerpc/tlstocso.d: Adjust. * ld-powerpc/tlstocso.r: Adjust.
2013-01-31bfd/Alan Modra1-1/+1
* elf64-ppc.c (ppc_stub_name): Trim off trailing "+0". ld/testsuite/ * ld-powerpc/tlsexe.d: Update for changed stub names. * ld-powerpc/tlsexe.r: Likewise. * ld-powerpc/tlsexetoc.d: Likewise. * ld-powerpc/tlsexetoc.r: Likewise. * ld-powerpc/tlsso.d: Likewise. * ld-powerpc/tlsso.r: Likewise. * ld-powerpc/tlstocso.d: Likewise. * ld-powerpc/tlstocso.r: Likewise.
2012-11-23include/opcode/Alan Modra1-1/+1
* ppc.h (ppc_parse_cpu): Update prototype. opcodes/ * ppc-dis.c (ppc_parse_cpu): Add "sticky" param. Track bits set from ppc_opts.sticky in it. Delete "retain_mask". (powerpc_init_dialect): Choose default dialect from info->mach before parsing -M options. Handle more bfd_mach_ppc variants. Update common default to power7. gas/ * config/tc-ppc.c (sticky): New var. (md_parse_option, ppc_machine): Update ppc_parse_cpu calls. gas/testsuite/ * gas/ppc/astest2.d: Pass -Mppc to objdump. ld/testsuite/ * ld-powerpc/plt1.d: Update for default "at" branch hints. * ld-powerpc/tlsexe.d: Likewise. * ld-powerpc/tlsexetoc.d: Likewise. * ld-powerpc/tlsopt1.d: Likewise. * ld-powerpc/tlsopt1_32.d: Likewise. * ld-powerpc/tlsopt2.d: Likewise. * ld-powerpc/tlsopt2_32.d: Likewise. * ld-powerpc/tlsopt4.d: Likewise. * ld-powerpc/tlsopt4_32.d: Likewise. * ld-powerpc/tlsso.d: Likewise. * ld-powerpc/tlstocso.d: Likewise.
2012-10-29 * ld-powerpc/powerpc.exp: Modify emulation option passed to ldAlan Modra1-76/+76
when little-endian. * ld-powerpc/apuinfo-nul.rd: Update for le output. * ld-powerpc/apuinfo.rd: Likewise. * ld-powerpc/plt1.d: Likewise. * ld-powerpc/relax.d: Likewise. * ld-powerpc/relaxr.d: Likewise. * ld-powerpc/sdadyn.d: Likewise. * ld-powerpc/tls.d: Likewise. * ld-powerpc/tls.g: Likewise. * ld-powerpc/tls.t: Likewise. * ld-powerpc/tls32.d: Likewise. * ld-powerpc/tls32.g: Likewise. * ld-powerpc/tls32.t: Likewise. * ld-powerpc/tlsexe.d: Likewise. * ld-powerpc/tlsexe.g: Likewise. * ld-powerpc/tlsexe.r: Likewise. * ld-powerpc/tlsexe.t: Likewise. * ld-powerpc/tlsexe32.d: Likewise. * ld-powerpc/tlsexe32.g: Likewise. * ld-powerpc/tlsexe32.r: Likewise. * ld-powerpc/tlsexe32.t: Likewise. * ld-powerpc/tlsexetoc.d: Likewise. * ld-powerpc/tlsexetoc.g: Likewise. * ld-powerpc/tlsexetoc.r: Likewise. * ld-powerpc/tlsexetoc.t: Likewise. * ld-powerpc/tlsmark.d: Likewise. * ld-powerpc/tlsmark32.d: Likewise. * ld-powerpc/tlsopt1.d: Likewise. * ld-powerpc/tlsopt1_32.d: Likewise. * ld-powerpc/tlsopt2.d: Likewise. * ld-powerpc/tlsopt2_32.d: Likewise. * ld-powerpc/tlsopt3.d: Likewise. * ld-powerpc/tlsopt3_32.d: Likewise. * ld-powerpc/tlsopt4.d: Likewise. * ld-powerpc/tlsopt4_32.d: Likewise. * ld-powerpc/tlsso.d: Likewise. * ld-powerpc/tlsso.g: Likewise. * ld-powerpc/tlsso.r: Likewise. * ld-powerpc/tlsso.t: Likewise. * ld-powerpc/tlsso32.d: Likewise. * ld-powerpc/tlsso32.g: Likewise. * ld-powerpc/tlsso32.r: Likewise. * ld-powerpc/tlsso32.t: Likewise. * ld-powerpc/tlstoc.d: Likewise. * ld-powerpc/tlstoc.g: Likewise. * ld-powerpc/tlstoc.t: Likewise. * ld-powerpc/tlstocso.d: Likewise. * ld-powerpc/tlstocso.g: Likewise. * ld-powerpc/tlstocso.t: Likewise. * ld-powerpc/tocopt.out: Likewise.
2011-07-14bfd/Alan Modra1-3/+1
* elf64-ppc.c (struct ppc_link_hash_table): Add plt_static_chain. (build_plt_stub): Add plt_static_chain param, don't load r11 if false. (build_tls_get_addr_stub): Likewise. (ppc_build_one_stub): Update calls to above. (ppc_size_one_stub): Adjust stub size. (ppc64_elf_size_stubs): Add plt_static_chain param, save to htab. * elf64-ppc.h (ppc64_elf_size_stubs): Update prototype. ld/ * emultempl/ppc64elf.em (plt_static_chain): New var. (gld${EMULATION_NAME}_after_allocation): Pass to ppc64_elf_size_stubs. (PARSE_AND_LIST_PROLOGUE, PARSE_AND_LIST_LONGOPTS, PARSE_AND_LIST_OPTIONS, PARSE_AND_LIST_ARGS_CASES): Handle --plt-static-chain and --no-plt-static-chain. ld/testsuite/ * ld-powerpc/tlsexe.d, * ld-powerpc/tlsexe.g. *ld-powerpc/tlsexe.r, * ld-powerpc/tlsexetoc.d, * ld-powerpc/tlsexetoc.g, * ld-powerpc/tlsexetoc.r, * ld-powerpc/tlsso.d, * ld-powerpc/tlstocso.d: Update for plt stub change.
2009-10-02ld/Alan Modra1-1/+2
* emultempl/ppc32elf.em (emit_stub_syms): Init to -1. (ppc_after_open): Set emit_stubs_syms by default when shared. (OPTION_NO_STUBSYMS): Define. (PARSE_AND_LIST_LONGOPTS, PARSE_AND_LIST_OPTIONS, PARSE_AND_LIST_ARGS_CASES): Handle --no-emit-stub-syms. * emultempl/ppc64elf.em (emit_stub_syms): Init to -1. (gld${EMULATION_NAME}_finish): Set emit_stubs_syms by default. (OPTION_NO_STUBSYMS): Define. (PARSE_AND_LIST_LONGOPTS, PARSE_AND_LIST_OPTIONS, PARSE_AND_LIST_ARGS_CASES): Handle --no-emit-stub-syms. ld/testsuite/ * ld-powerpc/tlsexe.d: Update. * ld-powerpc/tlsexe.r: Update. * ld-powerpc/tlsexetoc.d: Update. * ld-powerpc/tlsexetoc.r: Update. * ld-powerpc/tlsso.d: Update. * ld-powerpc/tlsso.r: Update. * ld-powerpc/tlstocso.d: Update. * ld-powerpc/tlstocso.r: Update.
2009-09-21include/elf/Alan Modra1-5/+19
* ppc.h (DT_PPC_TLSOPT): Define. * ppc64.h (DT_PPC64_TLSOPT): Define. bfd/ * elf32-ppc.c (TLS_GET_ADDR_GLINK_SIZE): Define. (ADD_3_12_2, BEQLR, CMPWI_11_0, LWZ_11_3, LWZ_12_3): Define. (MR_0_3, MR_3_0): Define. (struct ppc_elf_link_hash_table): Add no_tls_get_addr_opt. (ppc_elf_select_plt_layout): Save emit_stub_syms param earlier. (ppc_elf_tls_setup): Add no_tls_get_addr_opt param and save to hash table. Check for presense of __tls_get_addr_opt (allocate_dynrelocs): Increase glink entry size for __tls_get_addr. (ppc_elf_size_dynamic_sections): Add DT_PPC_TLS_OPT tag. (write_glink_stub): Add param p. (ppc_elf_relocate_section): Adjust write_glink_stub call. (ppc_elf_finish_dynamic_symbol): Emit special glink call stub for __tls_get_addr. * elf32-ppc.h (ppc_elf_tls_setup): Update prototype. * elf64-ppc.c (struct ppc_link_hash_table): Add no_tls_get_addr_opt. (ppc64_elf_tls_setup): Add no_tls_get_addr_opt param and save to hash table. Check for presense of __tls_get_addr_opt. (ppc64_elf_size_dynamic_sections): Add DT_PPC64_TLS_OPT tag. (LD_R11_0R3, LD_R12_0R3, MR_R0_R3, CMPDI_R11_0, ADD_R3_R12_R13, BEQLR, MR_R3_R0, MFLR_R11, STD_R11_0R1, BCTRL, LD_R11_0R1, LD_R2_0R1, MTLR_R11): Define. (build_tls_get_addr_stub): New function. (ppc_build_one_stub): Call it. (ppc_size_one_stub): Add extra size for __tls_get_addr stub. (ppc64_elf_relocate_section): Don't change nop to ld 2,40(1) for __tls_get_addr plt call. * elf64-ppc.h (ppc64_elf_tls_setup): Update prototype. binutils/ * readelf.c (get_ppc_dynamic_type): Add TLSOPT. (get_ppc64_dynamic_type): Likewise. ld/ * emultempl/ppc32elf.em (no_tls_get_addr_opt): New var. (ppc_before_allocation): Pass to ppc_elf_tls_setup. (OPTION_NO_TLS_GET_ADDR_OPT): Define. Redefine other options in terms of previous option. (PARSE_AND_LIST_LONGOPTS, PARSE_AND_LIST_OPTIONS): Add --no-tls-get-addr-optimize. (PARSE_AND_LIST_ARGS_CASES): Handle it. * emultempl/ppc64elf.em (no_tls_get_addr_opt): New var. (ppc_before_allocation): Pass to ppc64_elf_tls_setup. (OPTION_NO_TLS_GET_ADDR_OPT): Define. (PARSE_AND_LIST_LONGOPTS, PARSE_AND_LIST_OPTIONS): Add --no-tls-get-addr-optimize. (PARSE_AND_LIST_ARGS_CASES): Handle it. ld/testsuite/ * ld-powerpc/tlslib.s: Delete dot-symbol entry syms. Add __tls_get_addr_opt. * ld-powerpc/tlslib32.s: Add __tls_get_addr_opt. * ld-powerpc/oldtlslib.s: New file, old-abi version of tlslib.s. * ld-powerpc/powerpc.exp: Build old-abi library and use it in two new link tests. * ld-powerpc/tlsexe.d: Update for new __tls_get_addr stub. * ld-powerpc/tlsexe.g, * ld-powerpc/tlsexe.r, *ld-powerpc/tlsexe32.d, * ld-powerpc/tlsexe32.g, * ld-powerpc/tlsexe32.r, * ld-powerpc/tlsexetoc.d, * ld-powerpc/tlsexetoc.g, * ld-powerpc/tlsexetoc.r: Likewise.
2007-08-13bfd/Alan Modra1-7/+5
* elf64-ppc.c (ADDI_R12_R12, LD_R11_0R2, LD_R2_0R2): Define. Update stub comments. (build_plt_stub): Build two variants, one without "addis". (ppc_build_one_stub): Build stubs without "addis" if possible. (ppc_size_one_stub): Size new stubs. ld/testsuite/ * ld-powerpc/relbrlt.s (.text.pad2): Adjust space. * ld-powerpc/relbrlt.d: Update. * ld-powerpc/tlsexe.d: Update. * ld-powerpc/tlsexe.g: Update. * ld-powerpc/tlsexe.r: Update. * ld-powerpc/tlsexetoc.d: Update. * ld-powerpc/tlsexetoc.g: Update. * ld-powerpc/tlsexetoc.r: Update. * ld-powerpc/tlsso.d: Update. * ld-powerpc/tlsso.g: Update. * ld-powerpc/tlsso.r: Update. * ld-powerpc/tlstocso.d: Update. * ld-powerpc/tlstocso.g: Update.
2006-08-17bfd/Alan Modra1-13/+14
* elf64-ppc.c (create_linkage_sections): Align .glink to 8 bytes. (ppc64_elf_build_stubs): Use new lazy linking stub. ld/testsuite/ * ld-powerpc/tlsexe.d: Update for lazy link stub change. * ld-powerpc/tlsexe.r: Likewise. * ld-powerpc/tlsexetoc.d: Likewise. * ld-powerpc/tlsexetoc.r: Likewise. * ld-powerpc/tlsso.d: Likewise. * ld-powerpc/tlstocso.d: Likewise.
2004-03-16opcodes/Alan Modra1-56/+56
* ppc-dis.c (print_insn_powerpc): Don't print tabs. Handle PPC_OPERANDS_GPR_0. * ppc-opc.c (RA0): Define. (RAQ, RAL, RAM, RAS, RSQ, RTQ, RSO): Use PPC_OPERAND_GPR_0. (RAOPT): Rename from RAO. Update all uses. (powerpc_opcodes): Use RA0 as appropriate. Add "lsdx", "lsdi", "stsdx", "stsdi", "lmd" and "stmd" insns. include/opcode/ * ppc.h (PPC_OPERAND_GPR_0): Define. Bump other operand defines. gas/testsuite/ Update gas/ppc/. ld/testsuite/ Update ld-powerpc/.
2003-06-10 * ld-elfvsb/elfvsb.exp: Run for powerpc64 too.Alan Modra1-7/+15
* ld-powerpc/tls.t: Update. * ld-powerpc/tlsexe.d: Update. * ld-powerpc/tlsexe.r: Update. * ld-powerpc/tlsexetoc.d: Update. * ld-powerpc/tlsexetoc.r: Update. * ld-powerpc/tlsexetoc.t: Update. * ld-powerpc/tlsso.d: Update. * ld-powerpc/tlsso.g: Update. * ld-powerpc/tlsso.r: Update. * ld-powerpc/tlsso.t: Update. * ld-powerpc/tlstocso.d: Update. * ld-powerpc/tlstocso.g: Update. * ld-powerpc/tlstocso.r: Update. * ld-powerpc/tlstocso.t: Update.
2003-02-18 * ld-powerpc/tlsexe.d: Update for changed handling of invalid LDAlan Modra1-57/+57
relocs. * ld-powerpc/tlsexe.g: Likewise. * ld-powerpc/tlsexe.r: Likewise. * ld-powerpc/tlsexe.t: Likewise.
2003-02-09 * ld-powerpc/tlslib.s: Give .__tls_get_addr function type.Alan Modra1-36/+55
* ld-powerpc/tlsexe.d: Update for changed handling of (invalid) ld var in dynamic lib. * ld-powerpc/tlsexe.g: Likewise. * ld-powerpc/tlsexe.r: Likewise. * ld-powerpc/tlsexe.t: Likewise. * ld-powerpc/tlsexetoc.d: Likewise. * ld-powerpc/tlsexetoc.g: Likewise. * ld-powerpc/tlsexetoc.r: Likewise. * ld-powerpc/tlsexetoc.t: Likewise.
2003-02-04new ppc64 tls testsAlan Modra1-0/+49
generated by cgit v1.1 at 2025-03-05 14:12:56 +0000