2012-09-17 11:09:12 +02:00
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/* $NetBSD: _setjmp.S,v 1.9 2011/04/30 23:41:12 martin Exp $ */
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2011-02-14 20:36:03 +01:00
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/*-
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* Copyright (c) 1999 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Paul Kranenburg.
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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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <machine/asm.h>
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#include <machine/trap.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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2012-09-17 11:09:12 +02:00
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RCSID("$NetBSD: _setjmp.S,v 1.9 2011/04/30 23:41:12 martin Exp $")
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2011-02-14 20:36:03 +01:00
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#endif /* LIBC_SCCS and not lint */
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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
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* the last call to
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* _setjmp(a)
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* The previous signal state is NOT restored.
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*/
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ENTRY(_setjmp)
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2012-09-17 11:09:12 +02:00
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/* store important globals, sigsetjmp compatible */
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st %g3, [%o0 + 16]
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st %g2, [%o0 + 24]
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st %g4, [%o0 + 48]
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st %g7, [%o0 + 52]
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2011-02-14 20:36:03 +01:00
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st %sp, [%o0+0] /* store caller's stack pointer */
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st %o7, [%o0+4] /* and the return pc */
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retl
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clr %o0 ! return 0
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ENTRY(_longjmp)
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sub %sp, 64, %sp ! set up a local stack frame
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tst %o1 ! compute v ? v : 1
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be,a 0f
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mov 1, %o1
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0:
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t ST_FLUSHWIN ! flush register windows out to the stack
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2012-09-17 11:09:12 +02:00
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/* restore globals */
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ld [%o0 + 16], %g3
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ld [%o0 + 24], %g2
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ld [%o0 + 48], %g4
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ld [%o0 + 52], %g7
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2011-02-14 20:36:03 +01:00
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/*
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* We restore the saved stack pointer to %fp, then issue
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* a `restore' instruction which will reload the register
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* window from the stack.
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*/
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ld [%o0+4], %o7 /* restore return pc */
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ld [%o0+0], %fp /* and stack pointer */
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retl ! success, return %o1
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restore %o1, 0, %o0
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