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EnigmA Amiga Run 1995 October
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EnigmA AMIGA RUN 01 (1995)(G.R. Edizioni)(IT)[!][issue 1995-10][Aminet 7].iso
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Aminet
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dev
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gcc
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ixemul_src.lha
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ixemul-41.0
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gen_library
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_setjmp.s
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1994-08-19
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2KB
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73 lines
/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* Redistribution and use in source and binary forms are permitted
* provided that: (1) source distributions retain this entire copyright
* notice and comment, and (2) distributions including binaries display
* the following acknowledgement: ``This product includes software
* developed by the University of California, Berkeley and its contributors''
* in the documentation or other materials provided with the distribution
* and in all advertising materials mentioning features or use of this
* software. 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
.asciz "@(#)_setjmp.s 5.1 (Berkeley) 5/12/90"
#endif /* LIBC_SCCS and not lint */
/*
* C library -- _setjmp, _longjmp
*
* _longjmp(a,v)
* will generate a "return(v)" from
* the last call to
* _setjmp(a)
* by restoring registers from the stack,
* The previous signal state is NOT restored.
*/
#include "DEFS.h"
ENTRY(_setjmp)
movl sp@(4),a0 /* save area pointer */
clrl a0@+ /* no old onstack */
clrl a0@+ /* no old sigmask */
movl sp,a0@+ /* save old SP */
movl a5,a0@+ /* save old FP */
clrl a0@+ /* no old AP */
movl sp@,a0@+ /* save old PC */
clrl a0@+ /* clear PS */
moveml d2-d7/a2-a4/a6,a0@ /* save other non-scratch regs */
clrl d0 /* return zero */
rts
ENTRY(_longjmp)
movl sp@(4),a0 /* save area pointer */
addql #8,a0 /* skip onstack/sigmask */
tstl a0@ /* ensure non-zero SP */
jeq botch /* oops! */
movl sp@(8),d0 /* grab return value */
jne ok /* non-zero ok */
moveq #1,d0 /* else make non-zero */
ok:
movl a0@+,sp /* restore SP */
movl a0@+,a5 /* restore FP */
addql #4,a0 /* skip AP */
movl a0@+,sp@ /* restore PC */
moveml a0@(4),d2-d7/a2-a4/a6 /* restore non-scratch regs */
rts
botch:
jsr _longjmperror
stop #0