/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (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 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <string.h>
#include <gelf.h>
#include <decl.h>
#include <msg.h>
/*
* Return number of entries in the section header array, taking
* extended headers into account.
*
* elf_getshnum() and elf_getshstrndx() were defined during the 2002 gABI
* meetings. They were supposed to return -1 for failure, and 0 for success.
* Our manpage documented them as such, but we then implemented them to
* return 0 for failure and 1 for success. This makes elf_getshnum() and
* elf_getshstrnum() non-portable to systems that implement the 2002 gABI
* definition.
*
* In 2005, the manpage was modified to match the code.
* In 2009, the discrepency was identified. elf_getshdrnum() and
* elf_getshdrstrndx() were created to provide a portable implementation.
* The older two functions are considered to be obsolete, and are retained
* for backward compatability.
*/
int
elf_getshdrnum(Elf *elf, size_t *shnum)
{
GElf_Ehdr ehdr;
Elf_Scn *scn;
GElf_Shdr shdr0;
if (gelf_getehdr(elf, &ehdr) == 0)
return (-1);
if (ehdr.e_shnum > 0) {
*shnum = ehdr.e_shnum;
return (0);
}
if ((ehdr.e_shnum == 0) && (ehdr.e_shoff == 0)) {
*shnum = 0;
return (0);
}
if ((scn = elf_getscn(elf, 0)) == 0)
return (-1);
if (gelf_getshdr(scn, &shdr0) == 0)
return (-1);
*shnum = shdr0.sh_size;
return (0);
}
int
elf_getshnum(Elf *elf, size_t *shnum)
{
return (elf_getshdrnum(elf, shnum) == 0);
}