103 lines
3.1 KiB
ArmAsm
103 lines
3.1 KiB
ArmAsm
/*
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* Copyright (c) 1980, 1993
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* The Regents of the University of California. 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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#if defined(LIBC_SCCS) && !defined(lint)
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/* .asciz "@(#)_setjmp.s 8.1 (Berkeley) 6/4/93" */
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.asciz "$NetBSD: _setjmp.S,v 1.2 1998/10/13 00:02:19 matt Exp $"
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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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* The previous signal state is NOT restored.
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*/
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#include "DEFS.h"
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ENTRY(_setjmp, 0)
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movl 4(ap),r0
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movl 12(fp),(r0) # save frame pointer of caller
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movl 16(fp),4(r0) # save pc of caller
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clrl r0
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ret
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ENTRY(_longjmp, 0)
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movl 8(ap),r0 # return(v)
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movl 4(ap),r1 # fetch buffer
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tstl (r1)
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beql botch
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loop:
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bitw $1,6(fp) # r0 saved?
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beql 1f
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movl r0,20(fp)
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bitw $2,6(fp) # was r1 saved?
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beql 2f
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movl r1,24(fp)
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brb 2f
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1:
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bitw $2,6(fp) # was r1 saved?
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beql 2f
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movl r1,20(fp)
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2:
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cmpl (r1),12(fp)
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beql done
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blssu botch
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movab loop,16(fp)
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ret # pop another frame
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done:
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cmpb *16(fp),reiins # returning to an "rei"?
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bneq 1f
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movab 3f,16(fp) # do return w/ psl-pc pop
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brw 2f
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1:
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movab 4f,16(fp) # do standard return
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2:
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ret # unwind stack before signals enabled
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3:
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addl2 $8,sp # compensate for PSL-PC push
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4:
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jmp *4(r1) # done, return....
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botch:
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calls $0,_longjmperror
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halt
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.data
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reiins: rei
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