/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <stdio.h>
#include <string.h>
#include <libelf.h>
#include <gelf.h>
#include <findfp.h>
#include <util.h>
int
findelfsym(Elf *elf, uintptr_t addr, char **symnamep, offset_t *offp)
{
Elf_Data *symtab;
GElf_Shdr shdr;
Elf_Scn *scn;
int symtabidx, nent, i;
if ((symtabidx = findelfsecidx(elf, ".symtab")) < 0)
elfdie("failed to find .symtab\n");
if ((scn = elf_getscn(elf, symtabidx)) == NULL ||
gelf_getshdr(scn, &shdr) == NULL ||
(symtab = elf_getdata(scn, NULL)) == NULL)
elfdie("failed to read .symtab");
nent = shdr.sh_size / shdr.sh_entsize;
for (i = 0; i < nent; i++) {
GElf_Sym sym;
if (gelf_getsym(symtab, i, &sym) == NULL)
elfdie("failed to get symbol at idx %d", i);
if ((GELF_ST_TYPE(sym.st_info) != STT_FUNC &&
GELF_ST_TYPE(sym.st_info) != STT_OBJECT) ||
sym.st_shndx == SHN_UNDEF)
continue;
if (addr - sym.st_value < sym.st_size) {
/* matched */
if ((*symnamep = elf_strptr(elf, shdr.sh_link,
sym.st_name)) == NULL)
elfdie("failed to get name for sym %d", i);
*offp = addr - sym.st_value;
return (1);
}
}
return (0);
}