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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (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 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#if defined(__lint)
#include <setjmp.h>
#endif
#include <sys/asm_linkage.h>
/*
* longjmp(env, val)
* will generate a "return(val)" from
* the last call to
* setjmp(env)
* by restoring registers ip, sp, bp, bx, si, and di from 'env'
* and doing a return.
*
* entry reg offset from (%si)
* env[0] = %ebx 0 / register variables
* env[1] = %esi 4
* env[2] = %edi 8
* env[3] = %ebp 12 / stack frame
* env[4] = %esp 16
* env[5] = %eip 20
*/
#if defined(__lint)
/* ARGSUSED */
int
setjmp(jmp_buf env)
{
return (0);
}
/* ARGSUSED */
int
sigsetjmp(sigjmp_buf env, int savemask)
{
return (0);
}
#else /* __lint */
ENTRY(setjmp)
ALTENTRY(sigsetjmp)
movl 4(%esp),%eax / jmpbuf address
movl %ebx,0(%eax) / save ebx
movl %esi,4(%eax) / save esi
movl %edi,8(%eax) / save edi
movl %ebp,12(%eax) / save caller's ebp
popl %edx / return address
movl %esp,16(%eax) / save caller's esp
movl %edx,20(%eax)
subl %eax,%eax / return 0
jmp *%edx
SET_SIZE(sigsetjmp)
SET_SIZE(setjmp)
#endif /* __lint */
#if defined(__lint)
/* ARGSUSED */
void
longjmp(jmp_buf env, int val)
{
}
/* ARGSUSED */
void
siglongjmp(sigjmp_buf env, int val)
{
}
#else /* __lint */
ENTRY(longjmp)
ALTENTRY(siglongjmp)
movl 4(%esp),%edx / first parameter after return addr
movl 8(%esp),%eax / second parameter
movl 0(%edx),%ebx / restore ebx
movl 4(%edx),%esi / restore esi
movl 8(%edx),%edi / restore edi
movl 12(%edx),%ebp / restore caller's ebp
movl 16(%edx),%esp / restore caller's esp
test %eax,%eax / if val != 0
jnz .ret / return val
incl %eax / else return 1
.ret:
jmp *20(%edx) / return to caller
SET_SIZE(siglongjmp)
SET_SIZE(longjmp)
#endif /* __lint */
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