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/*
* 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 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI"
#include "libelf.h"
#include "decl.h"
#include "msg.h"
char *
elf_strptr(Elf * elf, size_t ndx, size_t off)
{
Elf_Scn *s;
Elf_Data *d;
char *rc;
if (elf == 0)
return (0);
if ((s = elf_getscn(elf, ndx)) == 0) {
_elf_seterr(EREQ_STRSCN, 0);
return (0);
}
READLOCKS(elf, s)
if (elf->ed_class == ELFCLASS32) {
Elf32_Shdr* sh = (Elf32_Shdr*)s->s_shdr;
if ((sh == 0) || (sh->sh_type != SHT_STRTAB)) {
_elf_seterr(EREQ_STRSCN, 0);
READUNLOCKS(elf, s)
return (0);
}
} else if (elf->ed_class == ELFCLASS64) {
Elf64_Shdr* sh = (Elf64_Shdr*)s->s_shdr;
if ((sh == 0) || (sh->sh_type != SHT_STRTAB)) {
_elf_seterr(EREQ_STRSCN, 0);
READUNLOCKS(elf, s)
return (0);
}
} else {
_elf_seterr(EREQ_STRSCN, 0);
READUNLOCKS(elf, s)
return (0);
}
/*
* If the layout bit is set, use the offsets and
* sizes in the data buffers. Otherwise, take
* data buffers in order.
*/
d = 0;
if (elf->ed_uflags & ELF_F_LAYOUT) {
while ((d = _elf_locked_getdata(s, d)) != 0) {
if (d->d_buf == 0)
continue;
if ((off >= d->d_off) &&
(off < d->d_off + d->d_size)) {
rc = (char *)d->d_buf + off - d->d_off;
READUNLOCKS(elf, s)
return (rc);
}
}
} else {
size_t sz = 0, j;
while ((d = _elf_locked_getdata(s, d)) != 0) {
if (((j = d->d_align) > 1) && (sz % j != 0)) {
j -= sz % j;
sz += j;
if (off < j)
break;
off -= j;
}
if (d->d_buf != 0) {
if (off < d->d_size) {
rc = (char *)d->d_buf + off;
READUNLOCKS(elf, s)
return (rc);
}
}
sz += d->d_size;
if (off < d->d_size)
break;
off -= d->d_size;
}
}
_elf_seterr(EREQ_STROFF, 0);
READUNLOCKS(elf, s)
return (0);
}
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