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/*-
* Copyright (c) 2002 Peter Grehan.
* 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 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 AUTHOR 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.
*/
/* $NetBSD: setjmp.S,v 1.3 1998/10/03 12:30:38 tsubai Exp $ */
#include <machine/asm.h>
__FBSDID("$FreeBSD$");
#include <sys/syscall.h>
/*
* C library -- setjmp, longjmp
*
* longjmp(a,v)
* will generate a "return(v?v:1)" from the last call to
* setjmp(a)
* by restoring registers from the stack.
* The previous signal state is restored.
*
* jmpbuf layout:
* +------------+
* | unused |
* +------------+
* | sig state |
* | |
* | (4 words) |
* | |
* +------------+
* | saved regs |
* | ... |
*/
ENTRY(setjmp)
mr %r6,%r3
li %r3,1 /* SIG_BLOCK, but doesn't matter */
/* since set == NULL */
li %r4,0 /* set = NULL */
mr %r5,%r6 /* &oset */
addi %r5,%r5,4
li %r0, SYS_sigprocmask /*sigprocmask(SIG_BLOCK, NULL, &oset)*/
sc /*assume no error XXX */
mflr %r11 /* r11 <- link reg */
mfcr %r12 /* r12 <- condition reg */
mr %r10,%r1 /* r10 <- stackptr */
mr %r9,%r2 /* r9 <- global ptr */
stmw %r9,20(%r6)
li %r3,0 /* return (0) */
blr
.weak CNAME(longjmp)
.set CNAME(longjmp),CNAME(__longjmp)
ENTRY(__longjmp)
lmw %r9,20(%r3) /* restore regs */
mr %r6,%r4 /* save val param */
mtlr %r11 /* r11 -> link reg */
mtcr %r12 /* r12 -> condition reg */
mr %r2,%r9 /* r9 -> global ptr */
mr %r1,%r10 /* r10 -> stackptr */
mr %r4,%r3
li %r3,3 /* SIG_SETMASK */
addi %r4,%r4,4 /* &set */
li %r5,0 /* oset = NULL */
li %r0,SYS_sigprocmask /* sigprocmask(SIG_SET, &set, NULL) */
sc /* assume no error XXX */
or. %r3,%r6,%r6
bnelr
li %r3,1
blr
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