mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-13 23:00:22 +00:00
f420344cef
* elf/dynamic-link.h (elf_get_dynamic_info): Take new argument with load address. Relocate d_ptr in DT_DTRTAB, DT_SYMTAB, DT_RELA, DT_REL, DT_JMPREL, DT_PLTGOT, and DT_VERSYM l_info entry. (_ELF_DYNAMIC_DO_RELOC): Take extra argument which specifies whether rel and rela relocations can both happen and skip one test if this is not possible. (ELF_DYNAMIC_DO_RELA, ELF_DYNAMIC_DO_REL): Call _ELF_DYNAMIC_DO_RELOC appropriately. * elf/dl-addr.c (_dl_addr): DT_SYMTAB and DT_STRTAB entries are already relocated. * elf/dl-deps.c (_dl_map_object_deps): DT_STRTAB entry is already relocated. * elf/dl-load.c (_dl_init_paths): DT_STRTAB entry is already relocated. (_dl_map_object_from_fd): Call elf_get_dynamic_info with new argument. (_dl_map_object): DT_STRTAB entry is already relocated. * elf/dl-lookup.c (do_lookup): DT_STRTAB and DT_SYMTAB entries are already relocated. * elf/dl-reloc.c (_dl_relocate_object): DT_STRTAB entry is already relocated. * elf/dl-runtime.c (fixup): DT_SYMTAB, DT_STRTAB, DT_JMPREL, and DT_VERSYM entries are already relocated. (profile_fixup): Likewise. * elf/dl-version.c: Rename VERSTAG macro into VERSYMIDX. Replace all users. (match_symbol): DT_STRTAB entry is already relocated. (_dl_check_map_versions): Likewise. Also fo DT_VERSYM. * elf/do-rel.h (elf_dynamic_do_rel): reladdr is now assumed to be relocated already. DT_SYMTAB and DT_VERSYM entries are also relocated. * elf/rtld.c (_dl_start): Pass extra argument to elf_get_dynamic_info. (find_needed): DT_STRTAB entry is already relocated. (dl_main): Pass extra argument to elf_get_dynamic_info. DT_STRTAB entry is already relocated. * sysdeps/alpha/dl-machine.h (elf_machine_fixup_plt): DT_JMPREL and DT_PLTGOT entries are already relocated. (elf_machine_rela): Likewise for DT_SYMTAB. * sysdeps/arm/dl-machine.h (elf_machine_rel): DT_STRTAB is already relocated. * sysdeps/i386/dl-machine.h (elf_machine_rel): Likewise. * sysdeps/m68k/dl-machine.h (elf_machine_rela): Likewise. * sysdeps/sparc/sparc32/dl-machine.h (elf_machine_rela): Likewise. * sysdeps/sparc/sparc64/dl-machine.h (elf_machine_rela): Likewise. * sysdeps/powerpc/dl-machine.c (__process_machine_rela): Likewise. * sysdeps/mips/dl-machine.h (elf_machine_got_rel): Likewise. (elf_machine_got_rel): Likewise for DT_SYMTAB and DT_STRTAB. * grp/initgroups.c (initgroups): If function in current module was successful don't stop but continue to process to get all the groups.
219 lines
7.9 KiB
C
219 lines
7.9 KiB
C
/* Inline functions for dynamic linking.
|
|
Copyright (C) 1995, 1996, 1997, 1998, 1999 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. */
|
|
|
|
#include <elf.h>
|
|
#include <dl-machine.h>
|
|
#include <assert.h>
|
|
|
|
#ifndef VERSYMIDX
|
|
# define VERSYMIDX(sym) (DT_NUM + DT_PROCNUM + DT_VERSIONTAGIDX (sym))
|
|
#endif
|
|
|
|
|
|
/* Global read-only variable defined in rtld.c which is nonzero if we
|
|
shall give more warning messages. */
|
|
extern int _dl_verbose __attribute__ ((unused));
|
|
|
|
|
|
/* Read the dynamic section at DYN and fill in INFO with indices DT_*. */
|
|
|
|
static inline void __attribute__ ((unused))
|
|
elf_get_dynamic_info (ElfW(Dyn) *dyn, ElfW(Addr) l_addr,
|
|
ElfW(Dyn) *info[DT_NUM + DT_PROCNUM + DT_VERSIONTAGNUM
|
|
+ DT_EXTRANUM])
|
|
{
|
|
if (! dyn)
|
|
return;
|
|
|
|
while (dyn->d_tag != DT_NULL)
|
|
{
|
|
if (dyn->d_tag < DT_NUM)
|
|
info[dyn->d_tag] = dyn;
|
|
else if (dyn->d_tag >= DT_LOPROC &&
|
|
dyn->d_tag < DT_LOPROC + DT_PROCNUM)
|
|
info[dyn->d_tag - DT_LOPROC + DT_NUM] = dyn;
|
|
else if ((Elf32_Word) DT_VERSIONTAGIDX (dyn->d_tag) < DT_VERSIONTAGNUM)
|
|
info[VERSYMIDX (dyn->d_tag)] = dyn;
|
|
else if ((Elf32_Word) DT_EXTRATAGIDX (dyn->d_tag) < DT_EXTRANUM)
|
|
info[DT_EXTRATAGIDX (dyn->d_tag) + DT_NUM + DT_PROCNUM
|
|
+ DT_VERSIONTAGNUM] = dyn;
|
|
else
|
|
assert (! "bad dynamic tag");
|
|
++dyn;
|
|
}
|
|
|
|
if (info[DT_PLTGOT] != NULL)
|
|
info[DT_PLTGOT]->d_un.d_ptr += l_addr;
|
|
if (info[DT_STRTAB] != NULL)
|
|
info[DT_STRTAB]->d_un.d_ptr += l_addr;
|
|
if (info[DT_SYMTAB] != NULL)
|
|
info[DT_SYMTAB]->d_un.d_ptr += l_addr;
|
|
#if ! ELF_MACHINE_NO_RELA
|
|
if (info[DT_RELA] != NULL)
|
|
{
|
|
assert (info[DT_RELAENT]->d_un.d_val == sizeof (ElfW(Rela)));
|
|
info[DT_RELA]->d_un.d_ptr += l_addr;
|
|
}
|
|
#endif
|
|
#if ! ELF_MACHINE_NO_REL
|
|
if (info[DT_REL] != NULL)
|
|
{
|
|
assert (info[DT_RELENT]->d_un.d_val == sizeof (ElfW(Rel)));
|
|
info[DT_REL]->d_un.d_ptr += l_addr;
|
|
}
|
|
#endif
|
|
if (info[DT_PLTREL] != NULL)
|
|
{
|
|
#if ELF_MACHINE_NO_RELA
|
|
assert (info[DT_PLTREL]->d_un.d_val == DT_REL);
|
|
#elif ELF_MACHINE_NO_REL
|
|
assert (info[DT_PLTREL]->d_un.d_val == DT_RELA);
|
|
#else
|
|
assert (info[DT_PLTREL]->d_un.d_val == DT_REL
|
|
|| info[DT_PLTREL]->d_un.d_val == DT_RELA);
|
|
#endif
|
|
}
|
|
if (info[DT_JMPREL] != NULL)
|
|
info[DT_JMPREL]->d_un.d_ptr += l_addr;
|
|
if (info[VERSYMIDX (DT_VERSYM)] != NULL)
|
|
info[VERSYMIDX (DT_VERSYM)]->d_un.d_ptr += l_addr;
|
|
}
|
|
|
|
#ifdef RESOLVE
|
|
|
|
/* Get the definitions of `elf_dynamic_do_rel' and `elf_dynamic_do_rela'.
|
|
These functions are almost identical, so we use cpp magic to avoid
|
|
duplicating their code. It cannot be done in a more general function
|
|
because we must be able to completely inline. */
|
|
|
|
/* On some machines, notably SPARC, DT_REL* includes DT_JMPREL in its
|
|
range. Note that according to the ELF spec, this is completely legal!
|
|
But conditionally define things so that on machines we know this will
|
|
not happen we do something more optimal. */
|
|
|
|
# ifdef ELF_MACHINE_PLTREL_OVERLAP
|
|
# define _ELF_DYNAMIC_DO_RELOC(RELOC, reloc, map, do_lazy, test_rel) \
|
|
do { \
|
|
struct { ElfW(Addr) start, size; int lazy; } ranges[3]; \
|
|
int ranges_index; \
|
|
\
|
|
ranges[0].lazy = ranges[2].lazy = 0; \
|
|
ranges[1].lazy = 1; \
|
|
ranges[0].size = ranges[1].size = ranges[2].size = 0; \
|
|
\
|
|
if ((map)->l_info[DT_##RELOC]) \
|
|
{ \
|
|
ranges[0].start = (map)->l_info[DT_##RELOC]->d_un.d_ptr; \
|
|
ranges[0].size = (map)->l_info[DT_##RELOC##SZ]->d_un.d_val; \
|
|
} \
|
|
\
|
|
if ((do_lazy) \
|
|
&& (map)->l_info[DT_PLTREL] \
|
|
&& (!test_rel || (map)->l_info[DT_PLTREL]->d_un.d_val == DT_##RELOC)) \
|
|
{ \
|
|
ranges[1].start = (map)->l_info[DT_JMPREL]->d_un.d_ptr; \
|
|
ranges[1].size = (map)->l_info[DT_PLTRELSZ]->d_un.d_val; \
|
|
ranges[2].start = ranges[1].start + ranges[1].size; \
|
|
ranges[2].size = ranges[0].start + ranges[0].size - ranges[2].start; \
|
|
ranges[0].size = ranges[1].start - ranges[0].start; \
|
|
} \
|
|
\
|
|
for (ranges_index = 0; ranges_index < 3; ++ranges_index) \
|
|
elf_dynamic_do_##reloc ((map), \
|
|
ranges[ranges_index].start, \
|
|
ranges[ranges_index].size, \
|
|
ranges[ranges_index].lazy); \
|
|
} while (0)
|
|
# else
|
|
# define _ELF_DYNAMIC_DO_RELOC(RELOC, reloc, map, do_lazy, test_rel) \
|
|
do { \
|
|
struct { ElfW(Addr) start, size; int lazy; } ranges[2]; \
|
|
int ranges_index; \
|
|
ranges[0].lazy = 0; \
|
|
ranges[0].size = ranges[1].size = 0; \
|
|
ranges[0].start = 0; \
|
|
\
|
|
if ((map)->l_info[DT_##RELOC]) \
|
|
{ \
|
|
ranges[0].start = (map)->l_info[DT_##RELOC]->d_un.d_ptr; \
|
|
ranges[0].size = (map)->l_info[DT_##RELOC##SZ]->d_un.d_val; \
|
|
} \
|
|
if ((map)->l_info[DT_PLTREL] \
|
|
&& (!test_rel || (map)->l_info[DT_PLTREL]->d_un.d_val == DT_##RELOC)) \
|
|
{ \
|
|
ElfW(Addr) start = (map)->l_info[DT_JMPREL]->d_un.d_ptr; \
|
|
\
|
|
if ((do_lazy) \
|
|
/* This test does not only detect whether the relocation \
|
|
sections are in the right order, it also checks whether \
|
|
there is a DT_REL/DT_RELA section. */ \
|
|
|| ranges[0].start + ranges[0].size != start) \
|
|
{ \
|
|
ranges[1].start = start; \
|
|
ranges[1].size = (map)->l_info[DT_PLTRELSZ]->d_un.d_val; \
|
|
ranges[1].lazy = (do_lazy); \
|
|
} \
|
|
else \
|
|
/* Combine processing the sections. */ \
|
|
ranges[0].size += (map)->l_info[DT_PLTRELSZ]->d_un.d_val; \
|
|
} \
|
|
\
|
|
for (ranges_index = 0; ranges_index < 2; ++ranges_index) \
|
|
elf_dynamic_do_##reloc ((map), \
|
|
ranges[ranges_index].start, \
|
|
ranges[ranges_index].size, \
|
|
ranges[ranges_index].lazy); \
|
|
} while (0)
|
|
# endif
|
|
|
|
# if ELF_MACHINE_NO_REL || ELF_MACHINE_NO_RELA
|
|
# define _ELF_CHECK_REL 0
|
|
# else
|
|
# define _ELF_CHECK_REL 1
|
|
# endif
|
|
|
|
# if ! ELF_MACHINE_NO_REL
|
|
# include "do-rel.h"
|
|
# define ELF_DYNAMIC_DO_REL(map, lazy) \
|
|
_ELF_DYNAMIC_DO_RELOC (REL, rel, map, lazy, _ELF_CHECK_REL)
|
|
# else
|
|
# define ELF_DYNAMIC_DO_REL(map, lazy) /* Nothing to do. */
|
|
# endif
|
|
|
|
# if ! ELF_MACHINE_NO_RELA
|
|
# define DO_RELA
|
|
# include "do-rel.h"
|
|
# define ELF_DYNAMIC_DO_RELA(map, lazy) \
|
|
_ELF_DYNAMIC_DO_RELOC (RELA, rela, map, lazy, _ELF_CHECK_REL)
|
|
# else
|
|
# define ELF_DYNAMIC_DO_RELA(map, lazy) /* Nothing to do. */
|
|
# endif
|
|
|
|
/* This can't just be an inline function because GCC is too dumb
|
|
to inline functions containing inlines themselves. */
|
|
# define ELF_DYNAMIC_RELOCATE(map, lazy, consider_profile) \
|
|
do { \
|
|
int edr_lazy = elf_machine_runtime_setup ((map), (lazy), \
|
|
(consider_profile)); \
|
|
ELF_DYNAMIC_DO_REL ((map), edr_lazy); \
|
|
ELF_DYNAMIC_DO_RELA ((map), edr_lazy); \
|
|
} while (0)
|
|
|
|
#endif
|