mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-15 15:40:12 +00:00
f2ea0f5b0d
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.
138 lines
4.2 KiB
C
138 lines
4.2 KiB
C
/* 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
|