/*
* 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.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/systeminfo.h>
#include "_conv.h"
#include "arch_msg.h"
/*
* Determine if the 32-bit or 64-bit kernel is running.
* Return the corresponding EI_CLASS constant.
*/
int
conv_sys_eclass(void)
{
char buf[BUFSIZ];
/*
* SI_ISALIST will return -1 on pre-2.6 machines,
* which is fine - it can't be a 64-bit kernel.
*/
if (sysinfo(SI_ISALIST, buf, BUFSIZ) == -1)
return (ELFCLASS32);
if ((strstr(buf, MSG_ORIG(MSG_ARCH_SPARCV9)) != NULL) ||
(strstr(buf, MSG_ORIG(MSG_ARCH_AMD64)) != NULL))
return (ELFCLASS64);
return (ELFCLASS32);
}
#if defined(_LP64)
/* ARGSUSED */
uchar_t
conv_check_native(char **argv, char **envp)
{
/* 64-bit version does nothing */
return (ELFCLASS64);
}
#else
/*
* Wrapper for isaexec(3c) that allows disabling 64-bit counterpart execution
* via setting LD_NOEXEC64=yes.
*
* The only callers are 32-bit sgs applications. These applications determine
* whether a 64-bit counterpart is available via this routine, and if not,
* control is passed back to the caller, who will then complete execution.
* Note, isaexec() will eventually fall through to looking for a 32-bit
* counterpart (ie. sparcv7, or sparc), but as none of the callers provide these
* counterparts, we simply return to the caller.
*/
uchar_t
conv_check_native(char **argv, char **envp)
{
const char *str;
/*
* LD_NOEXEC_64 defined in the environment prevents the isaexec() call.
* This is used by the test suite to test 32-bit support libraries.
*/
if (((str = getenv(MSG_ORIG(MSG_LD_NOEXEC64))) != NULL) && *str)
return (ELFCLASS32);
if ((str = getexecname()) != NULL)
(void) isaexec(str, argv, envp);
return (ELFCLASS32);
}
#endif