17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate * CDDL HEADER START
37c478bd9Sstevel@tonic-gate *
47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*62b628a6SAli Bahrami * Common Development and Distribution License (the "License").
6*62b628a6SAli Bahrami * You may not use this file except in compliance with the License.
77c478bd9Sstevel@tonic-gate *
87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions
117c478bd9Sstevel@tonic-gate * and limitations under the License.
127c478bd9Sstevel@tonic-gate *
137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
187c478bd9Sstevel@tonic-gate *
197c478bd9Sstevel@tonic-gate * CDDL HEADER END
207c478bd9Sstevel@tonic-gate */
217c478bd9Sstevel@tonic-gate /*
22*62b628a6SAli Bahrami * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
237c478bd9Sstevel@tonic-gate * Use is subject to license terms.
247c478bd9Sstevel@tonic-gate */
257c478bd9Sstevel@tonic-gate
267c478bd9Sstevel@tonic-gate #include <string.h>
277c478bd9Sstevel@tonic-gate #include <gelf.h>
287c478bd9Sstevel@tonic-gate #include <decl.h>
297c478bd9Sstevel@tonic-gate #include <msg.h>
307c478bd9Sstevel@tonic-gate
317c478bd9Sstevel@tonic-gate
32*62b628a6SAli Bahrami /*
33*62b628a6SAli Bahrami * Return number of entries in the section header array, taking
34*62b628a6SAli Bahrami * extended headers into account.
35*62b628a6SAli Bahrami *
36*62b628a6SAli Bahrami * elf_getshnum() and elf_getshstrndx() were defined during the 2002 gABI
37*62b628a6SAli Bahrami * meetings. They were supposed to return -1 for failure, and 0 for success.
38*62b628a6SAli Bahrami * Our manpage documented them as such, but we then implemented them to
39*62b628a6SAli Bahrami * return 0 for failure and 1 for success. This makes elf_getshnum() and
40*62b628a6SAli Bahrami * elf_getshstrnum() non-portable to systems that implement the 2002 gABI
41*62b628a6SAli Bahrami * definition.
42*62b628a6SAli Bahrami *
43*62b628a6SAli Bahrami * In 2005, the manpage was modified to match the code.
44*62b628a6SAli Bahrami * In 2009, the discrepency was identified. elf_getshdrnum() and
45*62b628a6SAli Bahrami * elf_getshdrstrndx() were created to provide a portable implementation.
46*62b628a6SAli Bahrami * The older two functions are considered to be obsolete, and are retained
47*62b628a6SAli Bahrami * for backward compatability.
48*62b628a6SAli Bahrami */
49*62b628a6SAli Bahrami
507c478bd9Sstevel@tonic-gate int
elf_getshdrnum(Elf * elf,size_t * shnum)51*62b628a6SAli Bahrami elf_getshdrnum(Elf *elf, size_t *shnum)
527c478bd9Sstevel@tonic-gate {
537c478bd9Sstevel@tonic-gate GElf_Ehdr ehdr;
547c478bd9Sstevel@tonic-gate Elf_Scn *scn;
557c478bd9Sstevel@tonic-gate GElf_Shdr shdr0;
567c478bd9Sstevel@tonic-gate
577c478bd9Sstevel@tonic-gate if (gelf_getehdr(elf, &ehdr) == 0)
58*62b628a6SAli Bahrami return (-1);
597c478bd9Sstevel@tonic-gate if (ehdr.e_shnum > 0) {
607c478bd9Sstevel@tonic-gate *shnum = ehdr.e_shnum;
61*62b628a6SAli Bahrami return (0);
627c478bd9Sstevel@tonic-gate }
637c478bd9Sstevel@tonic-gate if ((ehdr.e_shnum == 0) && (ehdr.e_shoff == 0)) {
647c478bd9Sstevel@tonic-gate *shnum = 0;
65*62b628a6SAli Bahrami return (0);
667c478bd9Sstevel@tonic-gate }
677c478bd9Sstevel@tonic-gate if ((scn = elf_getscn(elf, 0)) == 0)
68*62b628a6SAli Bahrami return (-1);
697c478bd9Sstevel@tonic-gate if (gelf_getshdr(scn, &shdr0) == 0)
70*62b628a6SAli Bahrami return (-1);
717c478bd9Sstevel@tonic-gate *shnum = shdr0.sh_size;
72*62b628a6SAli Bahrami return (0);
73*62b628a6SAli Bahrami }
74*62b628a6SAli Bahrami
75*62b628a6SAli Bahrami int
elf_getshnum(Elf * elf,size_t * shnum)76*62b628a6SAli Bahrami elf_getshnum(Elf *elf, size_t *shnum)
77*62b628a6SAli Bahrami {
78*62b628a6SAli Bahrami return (elf_getshdrnum(elf, shnum) == 0);
797c478bd9Sstevel@tonic-gate }
80