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*7257d1b4Sraf * Common Development and Distribution License (the "License").
6*7257d1b4Sraf * 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 */
21*7257d1b4Sraf
22*7257d1b4Sraf /*
23*7257d1b4Sraf * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
24*7257d1b4Sraf * Use is subject to license terms.
25*7257d1b4Sraf */
26*7257d1b4Sraf
277c478bd9Sstevel@tonic-gate /* Copyright (c) 1988 AT&T */
287c478bd9Sstevel@tonic-gate /* All Rights Reserved */
297c478bd9Sstevel@tonic-gate
307c478bd9Sstevel@tonic-gate #include "libelf.h"
317c478bd9Sstevel@tonic-gate #include "decl.h"
327c478bd9Sstevel@tonic-gate #include "msg.h"
337c478bd9Sstevel@tonic-gate
347c478bd9Sstevel@tonic-gate
357c478bd9Sstevel@tonic-gate char *
elf_strptr(Elf * elf,size_t ndx,size_t off)367c478bd9Sstevel@tonic-gate elf_strptr(Elf * elf, size_t ndx, size_t off)
377c478bd9Sstevel@tonic-gate {
387c478bd9Sstevel@tonic-gate Elf_Scn *s;
397c478bd9Sstevel@tonic-gate Elf_Data *d;
407c478bd9Sstevel@tonic-gate char *rc;
417c478bd9Sstevel@tonic-gate
427c478bd9Sstevel@tonic-gate if (elf == 0)
437c478bd9Sstevel@tonic-gate return (0);
447c478bd9Sstevel@tonic-gate if ((s = elf_getscn(elf, ndx)) == 0) {
457c478bd9Sstevel@tonic-gate _elf_seterr(EREQ_STRSCN, 0);
467c478bd9Sstevel@tonic-gate return (0);
477c478bd9Sstevel@tonic-gate }
487c478bd9Sstevel@tonic-gate READLOCKS(elf, s)
497c478bd9Sstevel@tonic-gate if (elf->ed_class == ELFCLASS32) {
507c478bd9Sstevel@tonic-gate Elf32_Shdr* sh = (Elf32_Shdr*)s->s_shdr;
517c478bd9Sstevel@tonic-gate
527c478bd9Sstevel@tonic-gate if ((sh == 0) || (sh->sh_type != SHT_STRTAB)) {
537c478bd9Sstevel@tonic-gate _elf_seterr(EREQ_STRSCN, 0);
547c478bd9Sstevel@tonic-gate READUNLOCKS(elf, s)
557c478bd9Sstevel@tonic-gate return (0);
567c478bd9Sstevel@tonic-gate }
577c478bd9Sstevel@tonic-gate } else if (elf->ed_class == ELFCLASS64) {
587c478bd9Sstevel@tonic-gate Elf64_Shdr* sh = (Elf64_Shdr*)s->s_shdr;
597c478bd9Sstevel@tonic-gate
607c478bd9Sstevel@tonic-gate if ((sh == 0) || (sh->sh_type != SHT_STRTAB)) {
617c478bd9Sstevel@tonic-gate _elf_seterr(EREQ_STRSCN, 0);
627c478bd9Sstevel@tonic-gate READUNLOCKS(elf, s)
637c478bd9Sstevel@tonic-gate return (0);
647c478bd9Sstevel@tonic-gate }
657c478bd9Sstevel@tonic-gate } else {
667c478bd9Sstevel@tonic-gate _elf_seterr(EREQ_STRSCN, 0);
677c478bd9Sstevel@tonic-gate READUNLOCKS(elf, s)
687c478bd9Sstevel@tonic-gate return (0);
697c478bd9Sstevel@tonic-gate }
707c478bd9Sstevel@tonic-gate
717c478bd9Sstevel@tonic-gate
727c478bd9Sstevel@tonic-gate /*
737c478bd9Sstevel@tonic-gate * If the layout bit is set, use the offsets and
747c478bd9Sstevel@tonic-gate * sizes in the data buffers. Otherwise, take
757c478bd9Sstevel@tonic-gate * data buffers in order.
767c478bd9Sstevel@tonic-gate */
777c478bd9Sstevel@tonic-gate
787c478bd9Sstevel@tonic-gate d = 0;
797c478bd9Sstevel@tonic-gate if (elf->ed_uflags & ELF_F_LAYOUT) {
807c478bd9Sstevel@tonic-gate while ((d = _elf_locked_getdata(s, d)) != 0) {
817c478bd9Sstevel@tonic-gate if (d->d_buf == 0)
827c478bd9Sstevel@tonic-gate continue;
837c478bd9Sstevel@tonic-gate if ((off >= d->d_off) &&
847c478bd9Sstevel@tonic-gate (off < d->d_off + d->d_size)) {
857c478bd9Sstevel@tonic-gate rc = (char *)d->d_buf + off - d->d_off;
867c478bd9Sstevel@tonic-gate READUNLOCKS(elf, s)
877c478bd9Sstevel@tonic-gate return (rc);
887c478bd9Sstevel@tonic-gate }
897c478bd9Sstevel@tonic-gate }
907c478bd9Sstevel@tonic-gate } else {
917c478bd9Sstevel@tonic-gate size_t sz = 0, j;
927c478bd9Sstevel@tonic-gate while ((d = _elf_locked_getdata(s, d)) != 0) {
937c478bd9Sstevel@tonic-gate if (((j = d->d_align) > 1) && (sz % j != 0)) {
947c478bd9Sstevel@tonic-gate j -= sz % j;
957c478bd9Sstevel@tonic-gate sz += j;
967c478bd9Sstevel@tonic-gate if (off < j)
977c478bd9Sstevel@tonic-gate break;
987c478bd9Sstevel@tonic-gate off -= j;
997c478bd9Sstevel@tonic-gate }
1007c478bd9Sstevel@tonic-gate if (d->d_buf != 0) {
1017c478bd9Sstevel@tonic-gate if (off < d->d_size) {
1027c478bd9Sstevel@tonic-gate rc = (char *)d->d_buf + off;
1037c478bd9Sstevel@tonic-gate READUNLOCKS(elf, s)
1047c478bd9Sstevel@tonic-gate return (rc);
1057c478bd9Sstevel@tonic-gate }
1067c478bd9Sstevel@tonic-gate }
1077c478bd9Sstevel@tonic-gate sz += d->d_size;
1087c478bd9Sstevel@tonic-gate if (off < d->d_size)
1097c478bd9Sstevel@tonic-gate break;
1107c478bd9Sstevel@tonic-gate off -= d->d_size;
1117c478bd9Sstevel@tonic-gate }
1127c478bd9Sstevel@tonic-gate }
1137c478bd9Sstevel@tonic-gate _elf_seterr(EREQ_STROFF, 0);
1147c478bd9Sstevel@tonic-gate READUNLOCKS(elf, s)
1157c478bd9Sstevel@tonic-gate return (0);
1167c478bd9Sstevel@tonic-gate }
117