sn1_crt.s revision 628e3cbed6489fa1db545d8524a06cd6535af456
/*
* 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.
*/
#include <sys/asm_linkage.h>
#include <sys/link.h>
#if defined(lint)
void
_start(void)
{
}
#else /* lint */
.section ".text"
/*
* Initial entry point for the brand emulation library.
*
* This platform specific assembly entry point exists just to invoke
* the common brand library startup routine. That routine expects to
* be called with the following arguments:
* sn1_init(int argc, char *argv[], char *envp[])
*
* There are no arguments explicitly passed to this entry point,
* routine, but we do know how our initial stack has been setup by
* the kernel. The stack format is documented in:
* usr/src/cmd/sgs/rtld/sparc/boot.s
* usr/src/cmd/sgs/rtld/sparcv9/boot.s
*
* So this routine will troll through the stack to setup the argument
* values for the common brand library startup routine and then invoke
* it.
*/
ENTRY_NP(_start)
#if defined (__sparcv9)
save %sp, -SA(MINFRAME + EB_MAX_SIZE64), %sp
#else /* !__sparcv9 */
save %sp, -SA(MINFRAME + EB_MAX_SIZE32), %sp
#endif /* !__sparcv9 */
/* get argc */
ldn [%fp + WINDOWSIZE + STACK_BIAS], %o0
/* get argv */
add %fp, + WINDOWSIZE + CPTRSIZE + STACK_BIAS, %o1
/* get envp */
add %o0, 1, %l0 ! add 1 to argc for last element of 0
sll %l0, CPTRSHIFT, %l0 ! multiply argc by pointer size
add %o1, %l0, %o2 ! and add to argv to get first env ptr
call sn1_init
nop
/*NOTREACHED*/
SET_SIZE(_start)
#endif /* lint */