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sigsetjmp.S revision 1.6 
      1 /*	$NetBSD: sigsetjmp.S,v 1.6 1999/10/25 23:48:12 thorpej Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1990 The Regents of the University of California.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to Berkeley by
      8  * the Systems Programming Group of the University of Utah Computer
      9  * Science Department.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  * 3. All advertising materials mentioning features or use of this software
     20  *    must display the following acknowledgement:
     21  *	This product includes software developed by the University of
     22  *	California, Berkeley and its contributors.
     23  * 4. Neither the name of the University nor the names of its contributors
     24  *    may be used to endorse or promote products derived from this software
     25  *    without specific prior written permission.
     26  *
     27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     37  * SUCH DAMAGE.
     38  */
     39 
     40 #include <machine/asm.h>
     41 
     42 #if defined(LIBC_SCCS) && !defined(lint)
     43 #if 0
     44 	RCSID("from: @(#)_setjmp.s	5.1 (Berkeley) 5/12/90")
     45 #else
     46 	RCSID("$NetBSD: sigsetjmp.S,v 1.6 1999/10/25 23:48:12 thorpej Exp $")
     47 #endif
     48 #endif /* LIBC_SCCS and not lint */
     49 
     50 /*
     51  * C library -- sigsetjmp, siglongjmp
     52  *
     53  *	siglongjmp(a,v)
     54  * will generate a "return(v)" from
     55  * the last call to
     56  *	sigsetjmp(a,m)
     57  * by restoring registers from the stack,
     58  * The previous signal state is restored if 'm' was non-zero.
     59  */
     60 
     61 /* grab _JBLEN */
     62 #include <m68k/setjmp.h>
     63 
     64 ENTRY(sigsetjmp)
     65 	movl	%sp@(8),%d1	/* grab the mask */
     66         movl	%sp@(4),%a0	/* grab the area pointer */
     67 	movl	%d1,%a0@(_JBLEN * 4 )	/* save at end of area */
     68 	tstl	%d1
     69 	bne	dosig
     70 	jra	PIC_PLT(_C_LABEL(_setjmp))
     71 dosig:
     72 	jra	PIC_PLT(_C_LABEL(setjmp))
     73 
     74 
     75 ENTRY(siglongjmp)
     76 	movl	%sp@(4),%a0	/* save area pointer */
     77 	tstl	%a0@(_JBLEN * 4) /* check mask... */
     78 	bne	didsig
     79 	jra	PIC_PLT(_C_LABEL(_longjmp))
     80 didsig:
     81 	jra	PIC_PLT(_C_LABEL(longjmp))
     82