xref: /src/lib/libc/arch/ia64/gen/setjmp.S

/*	$NetBSD: setjmp.S,v 1.3 2023/10/11 09:12:20 skrll Exp $	*/

/*
 * Copyright (c) 1994, 1995 Carnegie-Mellon University.
 * All rights reserved.
 *
 * Author: Chris G. Demetriou
 *
 * Permission to use, copy, modify and distribute this software and
 * its documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 *
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie the
 * rights to redistribute these changes.
 */

#define _LOCORE
#include <machine/asm.h>

RCSID("$NetBSD: setjmp.S,v 1.3 2023/10/11 09:12:20 skrll Exp $")

#include    <machine/setjmp.h>

/*
 * 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,
 * and the previous signal state.
 */

ENTRY(__setjmp14, 1)
	alloc	loc0=ar.pfs,1,2,3,0
	mov	loc1=rp
	;;
	mov	out0=0				// how is ignored
	mov	out1=0				// set = NULL
	add	out2=J_SIGSET,in0		// oset = &jb[J_SIGSET]
	br.call.sptk.few rp=_sys___sigprocmask14
	;;
	mov	rp=loc1
	mov	r14=loc0
	;;
	alloc	r15=ar.pfs,1,0,0,0		// drop register frame
	;;
	mov	ar.pfs=r14			// restore ar.pfs
	br.sptk.many _setjmp			// finish saving state
END(__setjmp14)

ENTRY(__longjmp14, 2)
	alloc	loc0=ar.pfs,2,2,3,0
	mov	loc1=rp
	;;
	mov	out0=3				// how = SIG_SETMASK
	add	out1=J_SIGSET,in0		// set = &jb[J_SIGSET]
	mov	out2=0				// oset = NULL
	br.call.sptk.few rp=_sys___sigprocmask14
	;;
	mov	rp=loc1
	mov	r14=loc0
	;;
	alloc	r15=ar.pfs,2,0,0,0		// drop register frame
	;;
	mov	ar.pfs=r14			// restore ar.pfs
	br.sptk.many _longjmp			// finish restoring state
END(__longjmp14)