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      1 /*	$NetBSD: setjmp.S,v 1.3 2023/10/11 09:12:20 skrll 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 #define _LOCORE
     31 #include <machine/asm.h>
     32 
     33 RCSID("$NetBSD: setjmp.S,v 1.3 2023/10/11 09:12:20 skrll Exp $")
     34 
     35 #include    <machine/setjmp.h>
     36 
     37 /*
     38  * C library -- setjmp, longjmp
     39  *
     40  *	longjmp(a,v)
     41  * will generate a "return(v)" from
     42  * the last call to
     43  *	setjmp(a)
     44  * by restoring registers from the stack,
     45  * and the previous signal state.
     46  */
     47 
     48 ENTRY(__setjmp14, 1)
     49 	alloc	loc0=ar.pfs,1,2,3,0
     50 	mov	loc1=rp
     51 	;;
     52 	mov	out0=0				// how is ignored
     53 	mov	out1=0				// set = NULL
     54 	add	out2=J_SIGSET,in0		// oset = &jb[J_SIGSET]
     55 	br.call.sptk.few rp=_sys___sigprocmask14
     56 	;;
     57 	mov	rp=loc1
     58 	mov	r14=loc0
     59 	;;
     60 	alloc	r15=ar.pfs,1,0,0,0		// drop register frame
     61 	;;
     62 	mov	ar.pfs=r14			// restore ar.pfs
     63 	br.sptk.many _setjmp			// finish saving state
     64 END(__setjmp14)
     65 
     66 ENTRY(__longjmp14, 2)
     67 	alloc	loc0=ar.pfs,2,2,3,0
     68 	mov	loc1=rp
     69 	;;
     70 	mov	out0=3				// how = SIG_SETMASK
     71 	add	out1=J_SIGSET,in0		// set = &jb[J_SIGSET]
     72 	mov	out2=0				// oset = NULL
     73 	br.call.sptk.few rp=_sys___sigprocmask14
     74 	;;
     75 	mov	rp=loc1
     76 	mov	r14=loc0
     77 	;;
     78 	alloc	r15=ar.pfs,2,0,0,0		// drop register frame
     79 	;;
     80 	mov	ar.pfs=r14			// restore ar.pfs
     81 	br.sptk.many _longjmp			// finish restoring state
     82 END(__longjmp14)
     83