84 lines
2.2 KiB
C
84 lines
2.2 KiB
C
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/*
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getarsym.c - implementation of the elf_getarsym(3) function.
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Copyright (C) 1995 Michael Riepe <riepe@ifwsn4.ifw.uni-hannover.de>
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This 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
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This 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 this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <private.h>
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#include <byteswap.h>
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Elf_Arsym*
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elf_getarsym(Elf *elf, size_t *ptr) {
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Elf_Arsym *syms;
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size_t count;
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size_t tmp;
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size_t i;
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char *s;
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char *e;
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if (!ptr) {
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ptr = &tmp;
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}
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*ptr = 0;
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if (!elf) {
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return NULL;
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}
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elf_assert(elf->e_magic == ELF_MAGIC);
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if (elf->e_kind != ELF_K_AR) {
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seterr(ERROR_NOTARCHIVE);
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return NULL;
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}
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if (elf->e_symtab && !elf->e_free_syms) {
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if (elf->e_symlen < 4) {
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seterr(ERROR_SIZE_ARSYMTAB);
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return NULL;
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}
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count = __load_u32M(elf->e_symtab);
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if (elf->e_symlen < 4 * (count + 1)) {
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seterr(ERROR_SIZE_ARSYMTAB);
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return NULL;
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}
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if (!(syms = (Elf_Arsym*)malloc((count + 1) * sizeof(*syms)))) {
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seterr(ERROR_MEM_ARSYMTAB);
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return NULL;
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}
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s = elf->e_symtab + 4 * (count + 1);
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e = elf->e_symtab + elf->e_symlen;
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for (i = 0; i < count; i++, s++) {
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syms[i].as_name = s;
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while (s < e && *s) {
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s++;
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}
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if (s >= e) {
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seterr(ERROR_SIZE_ARSYMTAB);
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free(syms);
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return NULL;
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}
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elf_assert(!*s);
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syms[i].as_hash = elf_hash(syms[i].as_name);
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syms[i].as_off = __load_u32M(elf->e_symtab + 4 * (i + 1));
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}
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syms[count].as_name = NULL;
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syms[count].as_hash = ~0UL;
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syms[count].as_off = 0;
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elf->e_symtab = (char*)syms;
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elf->e_symlen = count + 1;
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elf->e_free_syms = 1;
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}
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*ptr = elf->e_symlen;
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return (Elf_Arsym*)elf->e_symtab;
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}
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