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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 <stdlib.h>
#include <memory.h>
#include <errno.h>
#include "decl.h"
#include "msg.h"
/*
* This module is compiled twice, the second time having
* -D_ELF64 defined. The following set of macros, along
* with machelf.h, represent the differences between the
* two compilations. Be careful *not* to add any class-
* dependent code (anything that has elf32 or elf64 in the
* name) to this code without hiding it behind a switch-
* able macro like these.
*/
#if defined(_ELF64)
#define ELFCLASS ELFCLASS64
#define elf_newphdr elf64_newphdr
#define elf_getehdr elf64_getehdr
#define _elf_msize _elf64_msize
#define elf_fsize elf64_fsize
#else /* else ELF32 */
#define ELFCLASS ELFCLASS32
#define elf_newphdr elf32_newphdr
#define elf_getehdr elf32_getehdr
#define _elf_msize _elf32_msize
#define elf_fsize elf32_fsize
#endif /* ELF64 */
Phdr *
elf_newphdr(Elf * elf, size_t count)
{
Elf_Void * ph;
size_t sz;
Phdr * rc;
unsigned work;
if (elf == 0)
return (0);
ELFRLOCK(elf)
if (elf->ed_class != ELFCLASS) {
_elf_seterr(EREQ_CLASS, 0);
ELFUNLOCK(elf)
return (0);
}
ELFUNLOCK(elf)
if (elf_getehdr(elf) == 0) { /* this cooks if necessary */
_elf_seterr(ESEQ_EHDR, 0);
return (0);
}
/*
* Free the existing header if appropriate. This could reuse
* existing space if big enough, but that's unlikely, benefit
* would be negligible, and code would be more complicated.
*/
ELFWLOCK(elf)
if (elf->ed_myflags & EDF_PHALLOC) {
elf->ed_myflags &= ~EDF_PHALLOC;
rc = elf->ed_phdr;
free(rc);
}
/*
* Delete the header if count is zero.
*/
ELFACCESSDATA(work, _elf_work)
if ((sz = count * _elf_msize(ELF_T_PHDR, work)) == 0) {
elf->ed_phflags &= ~ELF_F_DIRTY;
elf->ed_phdr = 0;
((Ehdr*)elf->ed_ehdr)->e_phnum = 0;
((Ehdr*)elf->ed_ehdr)->e_phentsize = 0;
elf->ed_phdrsz = 0;
ELFUNLOCK(elf)
return (0);
}
if ((ph = malloc(sz)) == 0) {
_elf_seterr(EMEM_PHDR, errno);
elf->ed_phflags &= ~ELF_F_DIRTY;
elf->ed_phdr = 0;
((Ehdr*)elf->ed_ehdr)->e_phnum = 0;
((Ehdr*)elf->ed_ehdr)->e_phentsize = 0;
elf->ed_phdrsz = 0;
ELFUNLOCK(elf)
return (0);
}
elf->ed_myflags |= EDF_PHALLOC;
(void) memset(ph, 0, sz);
elf->ed_phflags |= ELF_F_DIRTY;
/* LINTED */
((Ehdr*)elf->ed_ehdr)->e_phnum = (Half)count;
((Ehdr*)elf->ed_ehdr)->e_phentsize
/* LINTED */
= (Half)elf_fsize(ELF_T_PHDR, 1, work);
elf->ed_phdrsz = sz;
elf->ed_phdr = rc = ph;
ELFUNLOCK(elf)
return (rc);
}
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