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authorUlrich Drepper <drepper@redhat.com>1997-10-15 05:34:02 +0000
committerUlrich Drepper <drepper@redhat.com>1997-10-15 05:34:02 +0000
commitf2ea0f5b0d6ff2bbf261a5fd3d61f967e36f22e6 (patch)
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parent1ea89a402d892b68b193e2e4390d8eb33ed686e7 (diff)
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1997-10-15 06:56 Ulrich Drepper <drepper@cygnus.com> * Rules: Remove ruls to magically install <subdir>.h headers. Reported by Mark Kettenis <kettenis@phys.uva.nl>. * glibcbug.in: Fix @gnu.ai.mit.edu -> @gnu.org. * version.c: Likewise. * catgets/gencat.c: Likewise. * db2/makedb.c: Likewise. * locale/programs/locale.c: Likewise. * locale/programs/localedef.c: Likewise. * libc.map: Move _IO_list_all back to GLIBC_2.0. * elf/rtld.c: Provide name of running program to _dl_new_object. * Rules: Implement shared-only-sources. * include/libc-symbols.h: Define default_symbol_version. * libio/Makefile (shared-only-sources): Define. * libio/freopen.c: Define as default version. * libio/iofopen.c: Likewise. * libio/genops.c: Define _IO_list_all here. * libio/stdfiles.c: Create linked list with public names. * libio/oldstdfiles.c: Likewise. * stdio-common/printf.c: Optimize. * stdio-common/scanf.c: Optimize. * sysdeps/generic/setfpucw.c: Include #include <...> not "...". * sysdeps/i386/i486/bits/string.h: Add optimized versions of index and rindex. 1997-10-14 Andreas Jaeger <aj@arthur.rhein-neckar.de> * manual/arith.texi: Spelling fixes. * manual/conf.texi: Likewise. * manual/creature.texi: Likewise. * manual/filesys.texi: Likewise. * manual/intro.texi: Likewise. * manual/llio.texi: Likewise. * manual/math.texi: Likewise. * manual/message.texi: Likewise. * manual/pattern.texi: Likewise. * manual/search.texi: Likewise. * manual/signal.texi: Likewise. * manual/socket.texi: Likewise. * manual/startup.texi: Likewise. * manual/stdio.texi: Likewise. * manual/string.texi: Likewise. * manual/time.texi: Likewise. * manual/users.texi: Likewise. 1997-10-13 05:25 Ulrich Drepper <drepper@cygnus.com> * sysdeps/generic/sys/mman.h: Use __ptr_t instead of __caddr_t. * sysdeps/unix/bsd/osf/sys/mman.h: Likewise. * sysdeps/unix/bsd/sun/sunos4/sys/mman.h: Likewise. * sysdeps/unix/bsd/ultrix4/sys/mman.h: Likewise. * sysdeps/unix/sysv/irix4/sys/mman.h: Likewise. * sysdeps/unix/sysv/linux/sys/mman.h: Likewise. * sysdeps/mach/hurd/mmap.c: Likewise. * sysdeps/generic/mmap.c: Likewise. * sysdeps/unix/bsd/sun/sunos4/mmap.c: Likewise. * sysdeps/mach/munmap.c: Likewise. * sysdeps/generic/munmap.c: Likewise. * sysdeps/mach/mprotect.c: Likewise. * sysdeps/generic/mprotect.c: Likewise. * sysdeps/generic/msync.c: Likewise. * sysdeps/generic/madvise.c: Likewise. * sysdeps/unix/sysv/linux/madvise.c: Include stub version from generic subdir. 1997-10-12 20:27 Zack Weinberg <zack@rabi.phys.columbia.edu> * sysdeps/stub (all files): Moved to sysdeps/generic. * all files using stub_warning: Include <stub-tag.h>. * include/stub-tag.h: New file, marks stubs in .d files. * Makerules: Look for stub-tag.h, not sysdeps/stub, when building <gnu/stubs.h>. * configure.in: Don't add sysdeps/stub to $sysnames. * sysdeps/unix/Makefile: Look for generic headers, not stub headers. * sysdeps/generic/Makefile: Likewise. * manual/maint.texi: Delete references to sysdeps/stub. * INSTALL: Rebuilt. * configure: Rebuilt.
Diffstat (limited to 'sysdeps/generic/dl-machine.h')
-rw-r--r--sysdeps/generic/dl-machine.h137
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diff --git a/sysdeps/generic/dl-machine.h b/sysdeps/generic/dl-machine.h
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+++ b/sysdeps/generic/dl-machine.h
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+/* Machine-dependent ELF dynamic relocation inline functions. Stub version.
+ Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If
+ not, write to the Free Software Foundation, Inc.,
+ 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+#define ELF_MACHINE_NAME "stub"
+
+#include <assert.h>
+#include <string.h>
+#include <link.h>
+
+
+/* Return nonzero iff E_MACHINE is compatible with the running host. */
+static inline int
+elf_machine_matches_host (Elf32_Half e_machine)
+{
+ switch (e_machine)
+ {
+ default:
+ return 0;
+ }
+}
+
+
+/* Return the link-time address of _DYNAMIC. */
+static inline Elf32_Addr
+elf_machine_dynamic (void)
+{
+#error "Damn, no _DYNAMIC"
+}
+
+
+/* Return the run-time load address of the shared object. */
+static inline Elf32_Addr
+elf_machine_load_address (void)
+{
+#error "Where am I?"
+}
+
+/* Fixup a PLT entry to bounce directly to the function at VALUE. */
+
+static inline void
+elf_machine_fixup_plt (struct link_map *map, const Elf32_Rel *reloc,
+ Elf32_Addr *reloc_addr, Elf32_Addr value)
+{
+ *reloc_addr = value;
+}
+
+/* Perform the relocation specified by RELOC and SYM (which is fully resolved).
+ LOADADDR is the load address of the object; INFO is an array indexed
+ by DT_* of the .dynamic section info. */
+
+static inline void
+elf_machine_rel (Elf32_Addr loadaddr, Elf32_Dyn *info[DT_NUM],
+ const Elf32_Rel *reloc, const Elf32_Sym *sym,
+ Elf32_Addr (*resolve) (const Elf32_Sym **ref,
+ Elf32_Addr reloc_addr,
+ int noplt))
+{
+ Elf32_Addr *const reloc_addr = (Elf32_Addr *) reloc->r_offset;
+ Elf32_Addr loadbase;
+
+ switch (ELF32_R_TYPE (reloc->r_info))
+ {
+ case R_MACHINE_COPY:
+ loadbase = (*resolve) (&sym, (Elf32_Addr) reloc_addr, 0);
+ memcpy (reloc_addr, (void *) (loadbase + sym->st_value), sym->st_size);
+ break;
+ default:
+ assert (! "unexpected dynamic reloc type");
+ break;
+ }
+}
+
+
+static inline Elf32_Addr
+elf_machine_rela (Elf32_Addr loadaddr, Elf32_Dyn *info[DT_NUM],
+ const Elf32_Rel *reloc, const Elf32_Sym *sym,
+ Elf32_Addr (*resolve) (const Elf32_Sym **ref,
+ Elf32_Addr reloc_addr,
+ int noplt))
+{
+ _dl_signal_error (0, "Elf32_Rela relocation requested -- unused on "
+ ELF_MACHINE_NAME);
+}
+
+
+/* Nonzero iff TYPE describes relocation of a PLT entry, so
+ PLT entries should not be allowed to define the value. */
+#define elf_machine_pltrel_p(type) ((type) == R_???_JMP_SLOT)
+
+
+/* Set up the loaded object described by L so its unrelocated PLT
+ entries will jump to the on-demand fixup code in dl-runtime.c. */
+
+static inline int
+elf_machine_runtime_setup (struct link_map *l, int lazy)
+{
+ extern void _dl_runtime_resolve (Elf32_Word);
+
+ if (lazy)
+ {
+ /* The GOT entries for functions in the PLT have not yet been filled
+ in. Their initial contents will arrange when called to push an
+ offset into the .rel.plt section, push _GLOBAL_OFFSET_TABLE_[1],
+ and then jump to _GLOBAL_OFFSET_TABLE[2]. */
+ Elf32_Addr *got = (Elf32_Addr *) l->l_info[DT_PLTGOT]->d_un.d_ptr;
+ got[1] = (Elf32_Addr) l; /* Identify this shared object. */
+
+ /* This function will get called to fix up the GOT entry indicated by
+ the offset on the stack, and then jump to the resolved address. */
+ got[2] = (Elf32_Addr) &_dl_runtime_resolve;
+ }
+
+ return lazy;
+}
+
+
+/* Initial entry point code for the dynamic linker.
+ The C function `_dl_start' is the real entry point;
+ its return value is the user program's entry point. */
+
+#define RTLD_START #error need some startup code