1/* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#if defined(LIBC_SCCS) && !defined(lint) 31 /* .asciz "@(#)setjmp.s 8.1 (Berkeley) 6/4/93" */ 32 .asciz "$NetBSD: __setjmp14.S,v 1.9 2004/03/21 18:19:52 matt Exp $" 33#endif /* LIBC_SCCS and not lint */ 34 35/* 36 * C library -- setjmp, longjmp 37 * 38 * longjmp(a,v) 39 * will generate a "return(v)" from 40 * the last call to 41 * setjmp(a) 42 * by restoring registers from the stack, 43 * and a struct sigcontext, see <signal.h> 44 */ 45 46#include "DEFS.h" 47 48ENTRY(__setjmp14, R6) 49 movl 4(%ap),%r2 # construct sigcontext 50 subl2 $12,%sp # space for current struct sigstack 51 pushl %sp # get current values 52 pushl $0 # no new values 53 calls $4,_C_LABEL(__sigaltstack14) # pop args plus signal stack value 54 movl 4(%ap),%r2 # construct sigcontext 55 movl (%sp)+,(%r2) # save onsigstack status of caller 56 pushal 28(%r2) 57 pushl $0 58 pushl $0 59 calls $3,_C_LABEL(__sigprocmask14) # get signal mask 60 addl3 $8,4(%ap),%r2 # point to sp in signal context 61 clrl %r0 # assume no stack arguments 62 bbc $13,6(%fp),1f # handle callg 63 addl3 $1,(%ap),%r0 # get argument count +1 if calls 641: moval 24(%fp)[%r0],(%r2)+ # save sp of caller 65 movl 12(%fp),(%r2)+ # save frame pointer of caller 66 movl 8(%fp),(%r2)+ # save argument pointer of caller 67 movl 16(%fp),(%r2)+ # save pc of caller 68 movpsl (%r2) # save current psl 69 movw 4(%fp),(%r2) # save psw of caller 70#ifdef __ELF__ 71 addl3 $44,4(%ap),%r2 # point to past signal context 72 movq %r6,(%r2)+ # save r6/r7 73 movq %r8,(%r2)+ # save r8/r9 74 movq %r10,(%r2)+ # save r10/r11 75#endif 76 clrl %r0 77 ret 78 79#ifndef __ELF__ 80ENTRY(__longjmp14, 0) 81 movl 8(%ap),%r0 # return(v) 82 movl 4(%ap),%r1 # fetch buffer 83 tstl 12(%r1) # is fp non-null? 84 beql botch 85 86#ifdef __ELF__ 87 moval 44(%r1),%r2 # get ptr to saved registers 88 movq (%r2)+,%r6 # restore r6/r7 89 movq (%r2)+,%r8 # restore r8/r9 90 movq (%r2)+,%r10 # restore r10/r11 91#else 92loop: 93 cmpl 12(%r1),%fp # are we there yet? 94 beql done 95 blssu botch 96 moval 20(%fp),%r2 97 blbc 6(%fp),1f # was %r0 saved? 98 movl %r0,(%r2)+ 991: 100 bbc $1,6(%fp),2f # was %r1 saved? 101 movl %r1,(%r2) 1022: 103 movab loop,16(%fp) 104 ret # pop another frame 105 106done: 107#endif /* !__ELF__ */ 108 pushl %r1 # pointer to sigcontext 109 calls $1,_C_LABEL(__sigreturn14) # restore previous context 110 # we should never return 111botch: 112 calls $0,_C_LABEL(longjmperror) 113 halt 114#endif 115