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@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 33RCSID("$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 48ENTRY(__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 64END(__setjmp14) 65 66ENTRY(__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 82END(__longjmp14) 83