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/* $OpenBSD: setjmp.S,v 1.5 2004/03/01 18:05:50 drahn Exp $ */
/*
* Copyright (c) 1996 Dale Rahn. 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.
*
* 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.
*/
#include "SYS.h"
#include <machine/asm.h>
/* int setjmp(jmp_buf env) */
#define JMP_r1 0x04
#define JMP_r14 0x08
#define JMP_r15 0x0c
#define JMP_r16 0x10
#define JMP_r17 0x14
#define JMP_r18 0x18
#define JMP_r19 0x1c
#define JMP_r20 0x20
#define JMP_r21 0x24
#define JMP_r22 0x28
#define JMP_r23 0x2c
#define JMP_r24 0x30
#define JMP_r25 0x34
#define JMP_r26 0x38
#define JMP_r27 0x3c
#define JMP_r28 0x40
#define JMP_r29 0x44
#define JMP_r30 0x48
#define JMP_r31 0x4c
#define JMP_lr 0x50
#define JMP_cr 0x54
#define JMP_ctr 0x58
#define JMP_xer 0x5c
#define JMP_sig 0x60
.extern sigblock
ENTRY(setjmp)
/* r31, mask */
stw 31, JMP_r31(3)
mflr 0
stw 0, JMP_lr(3)
mr 31, 3
li 3, 0
bl PIC_PLT(sigblock)
stw 3, JMP_sig(31)
/* should sigstack be checked and saved */
mr 3, 31
lwz 0, JMP_lr(3)
mtlr 0
lwz 31, JMP_r31(3)
ENTRY(_setjmp)
stw 31, JMP_r31(3)
/* r1, r14-r30 */
stw 1, JMP_r1 (3)
stw 14, JMP_r14(3)
stw 15, JMP_r15(3)
stw 16, JMP_r16(3)
stw 17, JMP_r17(3)
stw 18, JMP_r18(3)
stw 19, JMP_r19(3)
stw 20, JMP_r20(3)
stw 21, JMP_r21(3)
stw 22, JMP_r22(3)
stw 23, JMP_r23(3)
stw 24, JMP_r24(3)
stw 25, JMP_r25(3)
stw 26, JMP_r26(3)
stw 27, JMP_r27(3)
stw 28, JMP_r28(3)
stw 29, JMP_r29(3)
stw 30, JMP_r30(3)
/* cr, lr, ctr, xer */
mfcr 0
stw 0, JMP_cr(3)
mflr 0
stw 0, JMP_lr(3)
mfctr 0
stw 0, JMP_ctr(3)
mfxer 0
stw 0, JMP_xer(3)
/* f14-f31, fpscr */
li 3, 0
blr
.extern sigsetmask
ENTRY(longjmp)
/* r31, mask */
mr 30, 3
mr 31, 4
lwz 3, JMP_sig(3)
bl PIC_PLT(sigsetmask)
/* should we deal with sigonstack here ?? */
mr 4, 31
mr 3, 30
ENTRY(_longjmp)
lwz 31, JMP_r31(3)
/* r1, r14-r30 */
lwz 1, JMP_r1 (3)
lwz 14, JMP_r14(3)
lwz 15, JMP_r15(3)
lwz 16, JMP_r16(3)
lwz 17, JMP_r17(3)
lwz 18, JMP_r18(3)
lwz 19, JMP_r19(3)
lwz 20, JMP_r20(3)
lwz 21, JMP_r21(3)
lwz 22, JMP_r22(3)
lwz 23, JMP_r23(3)
lwz 24, JMP_r24(3)
lwz 25, JMP_r25(3)
lwz 26, JMP_r26(3)
lwz 27, JMP_r27(3)
lwz 28, JMP_r28(3)
lwz 29, JMP_r29(3)
lwz 30, JMP_r30(3)
/* cr, lr, ctr, xer */
lwz 0, JMP_cr(3)
mtcr 0
lwz 0, JMP_lr(3)
mtlr 0
lwz 0, JMP_ctr(3)
mtctr 0
lwz 0, JMP_xer(3)
mtxer 0
/* f14-f31, fpscr */
/* if r4 == 0, return 1, not 0 */
mr 3, 4
cmpwi 4,0
bne 1f
li 3, 1
1:
blr
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