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/* $OpenBSD: _setjmp.S,v 1.7 2005/08/07 16:40:15 espie Exp $ */
/*
*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* 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.
*/
/*
* C library -- _setjmp, _longjmp
*
* _longjmp(a,v)
* will generate a "return(v?v:1)" from
* the last call to
* _setjmp(a)
* by restoring the previous context.
* The previous signal state is NOT restored.
*/
#include "DEFS.h"
#include <machine/trap.h> /* T_FLUSHWIN */
#define CCFSZ 96 /* from locore.S */
ENTRY(_setjmp)
st %sp, [%o0 + 0] /* store caller's stack pointer */
st %o7, [%o0 + 4] /* ... and return pc */
retl
clr %o0 ! return 0
ENTRY(_longjmp)
sub %sp, CCFSZ, %sp ! set up a local stack frame
tst %o1 ! compute v ? v : 1
be,a 0f
mov 1, %o1
0:
t ST_FLUSHWIN ! flush register windows out to the stack
/*
* We restore the saved stack pointer to %fp, then issue
* a `restore' instruction which will reload the register
* window from the stack.
*/
ld [%o0 + 4], %o7 /* restore return pc */
ld [%o0 + 0], %fp /* and stack pointer */
retl ! success, return %g6
restore %o1, 0, %o0
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