79 lines
2.6 KiB
C
79 lines
2.6 KiB
C
/* Do relocations for ELF dynamic linking.
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Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* This file may be included twice, to define both
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`elf_dynamic_do_rel' and `elf_dynamic_do_rela'. */
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#ifdef DO_RELA
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# define elf_dynamic_do_rel elf_dynamic_do_rela
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# define Rel Rela
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# define elf_machine_rel elf_machine_rela
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#endif
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#ifndef VERSYMIDX
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# define VERSYMIDX(sym) (DT_NUM + DT_PROCNUM + DT_VERSIONTAGIDX (sym))
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#endif
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/* Perform the relocations in MAP on the running program image as specified
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by RELTAG, SZTAG. If LAZY is nonzero, this is the first pass on PLT
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relocations; they should be set up to call _dl_runtime_resolve, rather
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than fully resolved now. */
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static inline void
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elf_dynamic_do_rel (struct link_map *map,
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ElfW(Addr) reladdr, ElfW(Addr) relsize,
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int lazy)
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{
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const ElfW(Rel) *r = (const ElfW(Rel) *)(map->l_addr + reladdr);
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const ElfW(Rel) *end = (const ElfW(Rel) *)(map->l_addr + reladdr + relsize);
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if (lazy)
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/* Doing lazy PLT relocations; they need very little info. */
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for (; r < end; ++r)
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elf_machine_lazy_rel (map, r);
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else
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{
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const ElfW(Sym) *const symtab =
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(const ElfW(Sym) *) (map->l_addr + map->l_info[DT_SYMTAB]->d_un.d_ptr);
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if (map->l_info[VERSYMIDX (DT_VERSYM)])
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{
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const ElfW(Half) *const version =
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(const ElfW(Half) *) (map->l_addr
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+ map->l_info[VERSYMIDX (DT_VERSYM)]->d_un.d_ptr);
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for (; r < end; ++r)
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{
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ElfW(Half) ndx = version[ELFW(R_SYM) (r->r_info)];
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elf_machine_rel (map, r, &symtab[ELFW(R_SYM) (r->r_info)],
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&map->l_versions[ndx],
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(void *) (map->l_addr + r->r_offset));
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}
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}
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else
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for (; r < end; ++r)
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elf_machine_rel (map, r, &symtab[ELFW(R_SYM) (r->r_info)], NULL,
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(void *) (map->l_addr + r->r_offset));
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}
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}
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#undef elf_dynamic_do_rel
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#undef Rel
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#undef elf_machine_rel
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