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/*-
* Copyright (c) 2002 Steve Murphree, Jr.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Steve Murphree, Jr.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#if defined(LIBC_SCCS)
.data
.string "$OpenBSD: _setjmp.S,v 1.6 2003/08/01 07:41:35 miod Exp $"
#endif /* LIBC_SCCS */
#include "SYS.h"
/*
* C library -- _setjmp, _longjmp
*
* _longjmp(a,v)
* will generate a "return(v)" from
* the last call to
* _setjmp(a)
* by restoring registers from the stack,
* The previous signal state is NOT saved
* or restored.
*
* For m88k, we define our jmp_buf length
* to be the size of 21 longs. <machine/setjmp.h>
* The buffer's usage is as follows:
*
* jmp_buf[0] return address
* jmp_buf[1] signal set (if used)
* jmp_buf[2 to 19] r14 to r31
* jmp_buf[20] setjmp type
*
*/
#include <machine/setjmp.h>
#define U_SETJMP_SIG 0x1764
/*
int _setjmp(jmp_buf env);
*/
ENTRY(_setjmp)
st r1, r2,0 /* save registers to the environment buffer */
st r0, r2,4 /* no signal set */
st r14,r2,8
st r15,r2,12
st r16,r2,16
st r17,r2,20
st r18,r2,24
st r19,r2,28
st r20,r2,32
st r21,r2,36
st r22,r2,40
st r23,r2,44
st r24,r2,48
st r25,r2,52
st r26,r2,56
st r27,r2,60
st r28,r2,64
st r29,r2,68
st r30,r2,72
st r31,r2,76
or r4,r0,0 /* clear r4 */
or r4,r0,U_SETJMP_SIG /* r4 now contains setjmp type */
st r4,r2,80 /* setjmp type to _setjmp */
jmp.n r1 /* return 0 */
or r2,r0,0
/*
void _longjmp(jmp_buf env, int val);
*/
ENTRY(_longjmp)
cmp r4,r2,r0 /* check for bad environment buffer address. */
bb1 eq,r4,2f /* if == 0, abort. */
ld r4,r2,80 /* check setjmp type. */
cmp r4,r4,U_SETJMP_SIG /* should be U_SETJMP_SIG */
bb1 ne,r4,2f /* if != U_SETJMP_SIG, abort. */
ld r14,r2,8 /* restore registers from the environment buffer */
ld r15,r2,12
ld r16,r2,16
ld r17,r2,20
ld r18,r2,24
ld r19,r2,28
ld r20,r2,32
ld r21,r2,36
ld r22,r2,40
ld r23,r2,44
ld r24,r2,48
ld r25,r2,52
ld r26,r2,56
ld r27,r2,60
ld r28,r2,64
ld r29,r2,68
ld r30,r2,72
ld r31,r2,76
ld r1,r2,0 /* restore r1 */
bcnd.n ne0,r3,1f
or r2,r3,r0
or r2,r0,1 /* never return zero! */
1: jmp r1
2: subu r31,r31,32 /* get a temporary stack */
st r1,r31,20 /* save r1 on stack (return address) */
bsr _C_LABEL(longjmperror)
bsr _C_LABEL(abort) /* NO RETURN */
ld r1,r31,20 /* restore r1 from stack */
addu r31,r31,32 /* restore the stack */
jmp r1 /* this should not happen but we are prepared */
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