92 lines
3.0 KiB
ArmAsm
92 lines
3.0 KiB
ArmAsm
/*-
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* Copyright (c) 2002 Peter Grehan.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/* $NetBSD: setjmp.S,v 1.3 1998/10/03 12:30:38 tsubai Exp $ */
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#include <machine/asm.h>
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__FBSDID("$FreeBSD$");
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#include <sys/syscall.h>
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/*
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* C library -- setjmp, longjmp
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*
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* longjmp(a,v)
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* will generate a "return(v?v:1)" from the last call to
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* setjmp(a)
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* by restoring registers from the stack.
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* The previous signal state is restored.
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*
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* jmpbuf layout:
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* +------------+
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* | unused |
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* +------------+
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* | sig state |
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* | |
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* | (4 words) |
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* | |
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* +------------+
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* | saved regs |
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* | ... |
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*/
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ENTRY(setjmp)
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mr %r6,%r3
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li %r3,1 /* SIG_BLOCK, but doesn't matter */
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/* since set == NULL */
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li %r4,0 /* set = NULL */
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mr %r5,%r6 /* &oset */
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addi %r5,%r5,4
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li %r0, SYS_sigprocmask /*sigprocmask(SIG_BLOCK, NULL, &oset)*/
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sc /*assume no error XXX */
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mflr %r11 /* r11 <- link reg */
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mfcr %r12 /* r12 <- condition reg */
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mr %r10,%r1 /* r10 <- stackptr */
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mr %r9,%r2 /* r9 <- global ptr */
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stmw %r9,20(%r6)
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li %r3,0 /* return (0) */
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blr
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.weak CNAME(longjmp)
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.set CNAME(longjmp),CNAME(__longjmp)
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ENTRY(__longjmp)
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lmw %r9,20(%r3) /* restore regs */
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mr %r6,%r4 /* save val param */
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mtlr %r11 /* r11 -> link reg */
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mtcr %r12 /* r12 -> condition reg */
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mr %r2,%r9 /* r9 -> global ptr */
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mr %r1,%r10 /* r10 -> stackptr */
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mr %r4,%r3
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li %r3,3 /* SIG_SETMASK */
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addi %r4,%r4,4 /* &set */
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li %r5,0 /* oset = NULL */
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li %r0,SYS_sigprocmask /* sigprocmask(SIG_SET, &set, NULL) */
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sc /* assume no error XXX */
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or. %r3,%r6,%r6
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bnelr
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li %r3,1
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blr
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