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      1 /* $NetBSD: compat_sigsetjmp.S,v 1.1 2005/09/16 18:21:19 drochner Exp $ */
      2 
      3 /*
      4  * Copyright (c) 1994, 1995 Carnegie-Mellon University.
      5  * All rights reserved.
      6  *
      7  * Author: Chris G. Demetriou
      8  *
      9  * Permission to use, copy, modify and distribute this software and
     10  * its documentation is hereby granted, provided that both the copyright
     11  * notice and this permission notice appear in all copies of the
     12  * software, derivative works or modified versions, and any portions
     13  * thereof, and that both notices appear in supporting documentation.
     14  *
     15  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     16  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     17  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     18  *
     19  * Carnegie Mellon requests users of this software to return to
     20  *
     21  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     22  *  School of Computer Science
     23  *  Carnegie Mellon University
     24  *  Pittsburgh PA 15213-3890
     25  *
     26  * any improvements or extensions that they make and grant Carnegie the
     27  * rights to redistribute these changes.
     28  */
     29 
     30 #include <machine/asm.h>
     31 
     32 /*
     33  * C library -- sigsetjmp, siglongjmp
     34  *
     35  *	siglongjmp(a,v)
     36  * will generate a "return(v)" from
     37  * the last call to
     38  *	sigsetjmp(a, mask)
     39  * by restoring registers from the stack.
     40  * If `mask' is non-zero, the previous signal
     41  * state will be restored.
     42  */
     43 
     44 	.set	noreorder
     45 
     46 LEAF(sigsetjmp, 2)
     47 	LDGP(pv)
     48 	stq	a1, (81 * 8)(a0)		/* save the mask */
     49 	bne	a1, Lsavesig			/* if !zero, save signals */
     50 	jmp	zero, _setjmp				/* else don't. */
     51 Lsavesig:
     52 	jmp	zero, setjmp
     53 END(sigsetjmp)
     54 
     55 LEAF(siglongjmp, 2)
     56 	LDGP(pv)
     57 	ldq	t0, (81 * 8)(a0)		/* get the mask */
     58 	bne	t0, Lrestoresig			/* if !zero, restore signals */
     59 	jmp	zero, _longjmp
     60 Lrestoresig:
     61 	jmp	zero, longjmp
     62 END(siglongjmp)
     63