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/*
* getarsym.c - implementation of the elf_getarsym(3) function.
* Copyright (C) 1995 - 1998, 2004 Michael Riepe
*
* This 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.
*
* This 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 this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <private.h>
#include <byteswap.h>
#ifndef lint
static const char rcsid[] = "@(#) $Id: getarsym.c,v 1.9 2008/05/23 08:15:34 michael Exp $";
#endif /* lint */
Elf_Arsym*
elf_getarsym(Elf *elf, size_t *ptr) {
Elf_Arsym *syms;
size_t count;
size_t tmp;
size_t i;
char *s;
char *e;
if (!ptr) {
ptr = &tmp;
}
*ptr = 0;
if (!elf) {
return NULL;
}
elf_assert(elf->e_magic == ELF_MAGIC);
if (elf->e_kind != ELF_K_AR) {
seterr(ERROR_NOTARCHIVE);
return NULL;
}
if (elf->e_symtab && !elf->e_free_syms) {
if (elf->e_symlen < 4) {
seterr(ERROR_SIZE_ARSYMTAB);
return NULL;
}
count = __load_u32M(elf->e_symtab);
if (elf->e_symlen < 4 * (count + 1)) {
seterr(ERROR_SIZE_ARSYMTAB);
return NULL;
}
if (!(syms = (Elf_Arsym*)malloc((count + 1) * sizeof(*syms)))) {
seterr(ERROR_MEM_ARSYMTAB);
return NULL;
}
s = elf->e_symtab + 4 * (count + 1);
e = elf->e_symtab + elf->e_symlen;
for (i = 0; i < count; i++, s++) {
syms[i].as_name = s;
while (s < e && *s) {
s++;
}
if (s >= e) {
seterr(ERROR_SIZE_ARSYMTAB);
free(syms);
return NULL;
}
elf_assert(!*s);
syms[i].as_hash = elf_hash((unsigned char*)syms[i].as_name);
syms[i].as_off = __load_u32M(elf->e_symtab + 4 * (i + 1));
}
syms[count].as_name = NULL;
syms[count].as_hash = ~0UL;
syms[count].as_off = 0;
elf->e_symtab = (char*)syms;
elf->e_symlen = count + 1;
elf->e_free_syms = 1;
}
*ptr = elf->e_symlen;
return (Elf_Arsym*)elf->e_symtab;
}
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