mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-11 15:50:06 +00:00
d66e34cd42
* sysdeps/i386/dl-machine.h: New file. * sysdeps/stub/dl-machine.h: New file. * sysdeps/i386/dl-runtime.c: New file. * sysdeps/stub/dl-runtime.c: New file. * sysdeps/i386/elf/start.S: New file. * sysdeps/generic/dl-sysdep.c: New file. * sysdeps/mach/hurd/dl-sysdep.c: New file.
65 lines
2.0 KiB
C
65 lines
2.0 KiB
C
/* On-demand PLT fixup for shared objects. Stub version.
|
|
Copyright (C) 1995 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 <link.h>
|
|
#include "dynamic-link.h"
|
|
|
|
/* This function is not called in the normal way. The PLT jumps here, not
|
|
using a call. */
|
|
void
|
|
_dl_runtime_resolve ()
|
|
{
|
|
struct link_map *l = ???;
|
|
Elf32_Word reloc_offset = ???;
|
|
|
|
const Elf32_Sym *const symtab
|
|
= (const Elf32_Sym *) l->l_info[DT_SYMTAB]->d_un.d_ptr;
|
|
const char *strtab
|
|
= ((void *) l->l_addr + l->l_info[DT_STRTAB]->d_un.d_ptr);
|
|
|
|
const Elf32_Rel *const reloc = (void *) (l->l_info[DT_JMPREL]->d_un.d_ptr
|
|
+ reloc_offset);
|
|
|
|
const Elf32_Sym *definer;
|
|
Elf32_Addr loadbase;
|
|
struct link_map *scope, *real_next;
|
|
|
|
/* Look up the symbol's run-time value. */
|
|
|
|
real_next = l->l_next;
|
|
if (l->l_info[DT_SYMBOLIC])
|
|
{
|
|
l->l_prev->l_next = real_next;
|
|
l->l_next = _dl_loaded;
|
|
scope = l;
|
|
}
|
|
else
|
|
scope = _dl_loaded;
|
|
|
|
definer = &symtab[ELF32_R_SYM (reloc->r_info)];
|
|
loadbase = _dl_lookup_symbol (strtab + definer->st_name, &definer, scope);
|
|
|
|
/* Restore list frobnication done above for DT_SYMBOLIC. */
|
|
l->l_next = real_next;
|
|
l->l_prev->l_next = l;
|
|
|
|
/* Apply the relocation with that value. */
|
|
elf_machine_rel (l->l_addr, l->l_info, reloc, loadbase, definer);
|
|
}
|