87 lines
3.2 KiB
ArmAsm
87 lines
3.2 KiB
ArmAsm
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/* $NetBSD: setjmp.S,v 1.11 2007/10/08 13:06:00 uwe Exp $ */
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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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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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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* from: Header: setjmp.s,v 1.2 92/06/25 03:18:43 torek Exp
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*/
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#include <machine/asm.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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.asciz "@(#)setjmp.s 8.1 (Berkeley) 6/4/93"
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#else
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RCSID("$NetBSD: setjmp.S,v 1.11 2007/10/08 13:06:00 uwe Exp $")
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#endif
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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)" from
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* the last call to
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* setjmp(a)
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* by restoring registers from the stack,
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* and a struct sigcontext, see <signal.h>
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*/
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#include "SYS.h"
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ENTRY(__setjmp14)
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save %sp, -CCFSZ, %sp
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/*
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* local vars on stack: struct sigstack foo @ offset 0x48
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* Note: sc_g1 is not used; sc_o0 is set in longjmp()
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*/
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mov 1, %o0 /* SIG_BLOCK */
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add %i0, 32, %o2 /* build sigcontext sc.sc_mask */
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call _C_LABEL(__sigprocmask14)
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clr %o1 /* sigprocmask(SIG_BLOCK, NULL, &sc.sc_mask) */
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add %sp, 0x48, %o1 /* (foo being in arg dump area) */
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call _C_LABEL(__sigaltstack14)
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clr %o0 /* sigstack(NULL, &foo) */
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ld [%sp + 0x48 + 8], %o0 /* foo.ss_flags */
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and %o0, 1, %o1 /* onstack = foo.ss_flags & 1; */
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st %o1, [%i0 + 0] /* sc.sc_onstack = current onstack; */
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st %fp, [%i0 + 8] /* sc.sc_sp = (caller's) sp */
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add %i7, 8, %o0
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st %o0, [%i0 + 12] /* sc.sc_pc = return_pc */
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add %i7, 12, %o0
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st %o0, [%i0 + 16] /* sc.sc_npc = return_pc + 4 */
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st %g0, [%i0 + 20] /* sc.sc_psr = (clean psr) */
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ret /* return 0 */
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restore %g0, %g0, %o0
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