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/* $OpenBSD: setjmp.S,v 1.1 2006/10/10 22:07:10 miod Exp $ */
/* $NetBSD: setjmp.S,v 1.10 2006/01/05 19:21:37 uwe Exp $ */
/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* 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. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
*
* from: @(#)setjmp.s 5.1 (Berkeley) 4/23/90
*/
#include <machine/asm.h>
#include <machine/setjmp.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 restored.
*/
ENTRY(setjmp)
PIC_PROLOGUE(.L_got_1)
sts.l pr, @-sp
mov.l r4, @-sp
mov.l .L_sigprocmask_1, r0
mov r4, r6
mov #1, r4 /* how = SIG_BLOCK */
mov #0, r5 /* new = NULL */
1: CALL r0
add #(_JB_SIGMASK * 4), r6 /* old = &sigmask */
mov.l @sp+, r4
lds.l @sp+, pr
PIC_EPILOGUE
/* identical to _setjmp except that _JB_HAS_MASK is non-zero */
add #((_JB_HAS_MASK + 1) * 4), r4
mov #1, r0
mov.l r0, @-r4 /* has signal mask */
mov.l r15, @-r4
mov.l r14, @-r4
mov.l r13, @-r4
mov.l r12, @-r4
mov.l r11, @-r4
mov.l r10, @-r4
mov.l r9, @-r4
mov.l r8, @-r4
sts.l pr, @-r4
rts
xor r0, r0
.align 2
.L_got_1: PIC_GOT_DATUM
.L_sigprocmask_1: CALL_DATUM(_C_LABEL(sigprocmask), 1b)
SET_ENTRY_SIZE(setjmp)
ENTRY(longjmp)
/* we won't return here, so we don't need to save pr and r12 */
PIC_PROLOGUE_NOSAVE(.L_got_2)
mov.l r5, @-sp
mov.l r4, @-sp
mov.l .L_sigprocmask_2, r0
mov r4, r5
mov #3, r4 /* how = SIG_SETMASK */
add #(_JB_SIGMASK * 4), r5 /* new = &sigmask */
1: CALL r0
mov #0, r6 /* old = NULL */
mov.l @sp+, r4
mov.l @sp+, r5
/* identical to _longjmp */
lds.l @r4+, pr
mov.l @r4+, r8
mov.l @r4+, r9
mov.l @r4+, r10
mov.l @r4+, r11
mov.l @r4+, r12
mov.l @r4+, r13
mov.l @r4+, r14
mov.l @r4+, r15
mov r5, r0
tst r0, r0 /* make sure return value is non-zero */
bf .L0
add #1, r0
.L0:
rts
nop
.align 2
.L_got_2: PIC_GOT_DATUM
.L_sigprocmask_2: CALL_DATUM(_C_LABEL(sigprocmask), 1b)
SET_ENTRY_SIZE(longjmp)
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