94 lines
3.3 KiB
C
94 lines
3.3 KiB
C
/* Inline functions for dynamic linking.
|
|
Copyright (C) 1995, 1996 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., 675 Mass Ave,
|
|
Cambridge, MA 02139, USA. */
|
|
|
|
#include <elf.h>
|
|
#include <dl-machine.h>
|
|
#include <assert.h>
|
|
|
|
|
|
/* Read the dynamic section at DYN and fill in INFO with indices DT_*. */
|
|
|
|
static inline void
|
|
elf_get_dynamic_info (ElfW(Dyn) *dyn, ElfW(Dyn) *info[DT_NUM + DT_PROCNUM])
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < DT_NUM + DT_PROCNUM; ++i)
|
|
info[i] = NULL;
|
|
|
|
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
|
|
assert (! "bad dynamic tag");
|
|
dyn++;
|
|
}
|
|
|
|
if (info[DT_RELA])
|
|
assert (info[DT_RELAENT]->d_un.d_val == sizeof (ElfW(Rela)));
|
|
if (info[DT_REL])
|
|
assert (info[DT_RELENT]->d_un.d_val == sizeof (ElfW(Rel)));
|
|
if (info[DT_PLTREL])
|
|
assert (info[DT_PLTREL]->d_un.d_val == DT_REL ||
|
|
info[DT_PLTREL]->d_un.d_val == DT_RELA);
|
|
}
|
|
|
|
/* 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. */
|
|
|
|
#if ! ELF_MACHINE_NO_REL
|
|
#include "do-rel.h"
|
|
#define ELF_DYNAMIC_DO_REL(map, lazy, resolve) \
|
|
if ((map)->l_info[DT_REL]) \
|
|
elf_dynamic_do_rel ((map), DT_REL, DT_RELSZ, (resolve), 0); \
|
|
if ((map)->l_info[DT_PLTREL] && \
|
|
(map)->l_info[DT_PLTREL]->d_un.d_val == DT_REL) \
|
|
elf_dynamic_do_rel ((map), DT_JMPREL, DT_PLTRELSZ, (resolve), (lazy));
|
|
#else
|
|
#define ELF_DYNAMIC_DO_REL(map, lazy, resolve) /* Nothing to do. */
|
|
#endif
|
|
|
|
#if ! ELF_MACHINE_NO_RELA
|
|
#define DO_RELA
|
|
#include "do-rel.h"
|
|
#define ELF_DYNAMIC_DO_RELA(map, lazy, resolve) \
|
|
if ((map)->l_info[DT_RELA]) \
|
|
elf_dynamic_do_rela ((map), DT_RELA, DT_RELASZ, (resolve), 0); \
|
|
if ((map)->l_info[DT_PLTREL] && \
|
|
(map)->l_info[DT_PLTREL]->d_un.d_val == DT_RELA) \
|
|
elf_dynamic_do_rela ((map), DT_JMPREL, DT_PLTRELSZ, (resolve), (lazy));
|
|
#else
|
|
#define ELF_DYNAMIC_DO_RELA(map, lazy, resolve) /* 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, resolve) \
|
|
do { ELF_DYNAMIC_DO_REL ((map), (lazy), (resolve)); \
|
|
ELF_DYNAMIC_DO_RELA ((map), (lazy), (resolve)); } while (0)
|