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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 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.16 */
#pragma weak elf_errmsg = _elf_errmsg
#pragma weak elf_errno = _elf_errno
#include "syn.h"
#include <thread.h>
#include <pthread.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <libelf.h>
#include "msg.h"
#include "decl.h"
#define ELFERRSHIFT 16
#define SYSERRMASK 0xffff
/*
* _elf_err has two values encoded in it, both the _elf_err # and
* the system errno value (if relevant). These values are encoded
* in the upper & lower 16 bits of the 4 byte integer.
*/
static int _elf_err = 0;
#if !defined(NATIVE_BUILD)
static thread_key_t errkey = THR_ONCE_KEY;
static thread_key_t bufkey = THR_ONCE_KEY;
#else /* NATIVE_BUILD */
/*
* This code is here to enable the building of a native version
* of libelf.so when the build machine has not yet been upgraded
* to a version of libc that provides thr_keycreate_once().
* It should be deleted when solaris_nevada ships.
* The code is not MT-safe in a relaxed memory model.
*/
static thread_key_t errkey = 0;
static thread_key_t bufkey = 0;
int
thr_keycreate_once(thread_key_t *keyp, void (*destructor)(void *))
{
static mutex_t key_lock = DEFAULTMUTEX;
thread_key_t key;
int error;
if (*keyp == 0) {
mutex_lock(&key_lock);
if (*keyp == 0) {
error = thr_keycreate(&key, destructor);
if (error) {
mutex_unlock(&key_lock);
return (error);
}
*keyp = key;
}
mutex_unlock(&key_lock);
}
return (0);
}
#endif /* NATIVE_BUILD */
extern char *_dgettext(const char *, const char *);
const char *
_libelf_msg(Msg mid)
{
return (_dgettext(MSG_ORIG(MSG_SUNW_OST_SGS), MSG_ORIG(mid)));
}
void
_elf_seterr(Msg lib_err, int sys_err)
{
/*LINTED*/
intptr_t encerr = ((int)lib_err << ELFERRSHIFT) |
(sys_err & SYSERRMASK);
#ifndef __lock_lint
if (thr_main()) {
_elf_err = (int)encerr;
return;
}
#endif
(void) thr_keycreate_once(&errkey, 0);
(void) thr_setspecific(errkey, (void *)encerr);
}
int
_elf_geterr() {
#ifndef __lock_lint
if (thr_main())
return (_elf_err);
#endif
return ((uintptr_t)pthread_getspecific(errkey));
}
const char *
elf_errmsg(int err)
{
char *errno_str;
char *elferr_str;
char *buffer = 0;
int syserr;
int elferr;
static char intbuf[MAXELFERR];
if (err == 0) {
if ((err = _elf_geterr()) == 0)
return (0);
} else if (err == -1) {
if ((err = _elf_geterr()) == 0)
/*LINTED*/ /* MSG_INTL(EINF_NULLERROR) */
err = (int)EINF_NULLERROR << ELFERRSHIFT;
}
if (thr_main())
buffer = intbuf;
else {
/*
* If this is a threaded APP then we store the
* errmsg buffer in Thread Specific Storage.
*
* Each thread has its own private buffer.
*/
if (thr_keycreate_once(&bufkey, free) != 0)
return (MSG_INTL(EBUG_THRDKEY));
buffer = pthread_getspecific(bufkey);
if (!buffer) {
if ((buffer = malloc(MAXELFERR)) == 0)
return (MSG_INTL(EMEM_ERRMSG));
if (thr_setspecific(bufkey, buffer) != 0) {
free(buffer);
return (MSG_INTL(EBUG_THRDSET));
}
}
}
elferr = (int)((uint_t)err >> ELFERRSHIFT);
syserr = err & SYSERRMASK;
/*LINTED*/
elferr_str = (char *)MSG_INTL(elferr);
if (syserr && (errno_str = strerror(syserr)))
(void) snprintf(buffer, MAXELFERR,
MSG_ORIG(MSG_FMT_ERR), elferr_str, errno_str);
else {
(void) strncpy(buffer, elferr_str, MAXELFERR - 1);
buffer[MAXELFERR - 1] = '\0';
}
return (buffer);
}
int
elf_errno()
{
int rc = _elf_geterr();
_elf_seterr(0, 0);
return (rc);
}
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