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 1.10 2005/05/03 04:37:33 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#include "assym.h" 48 49ENTRY(__setjmp14, R6) 50 movl 4(%ap),%r2 # construct sigcontext 51 subl2 $12,%sp # space for current struct sigstack 52 pushl %sp # get current values 53 pushl $0 # no new values 54 calls $4,_C_LABEL(__sigaltstack14) # pop args plus signal stack value 55 movl 4(%ap),%r2 # construct sigcontext 56 movl (%sp)+,(%r2) # save onsigstack status of caller 57 pushal 28(%r2) 58 pushl $0 59 pushl $0 60 calls $3,_C_LABEL(__sigprocmask14) # get signal mask 61 addl3 $8,4(%ap),%r2 # point to sp in signal context 62 clrl %r0 # assume no stack arguments 63 bbc $13,6(%fp),1f # handle callg 64 addl3 $1,(%ap),%r0 # get argument count +1 if calls 651: moval 24(%fp)[%r0],(%r2)+ # save sp of caller 66 movl 12(%fp),(%r2)+ # save frame pointer of caller 67 movl 8(%fp),(%r2)+ # save argument pointer of caller 68 movl 16(%fp),(%r2)+ # save pc of caller 69 movpsl (%r2) # save current psl 70 movw 4(%fp),(%r2) # save psw of caller 71#ifdef __ELF__ 72 addl3 $SC_LEN,4(%ap),%r2 # point to past signal context 73 movq %r6,(%r2)+ # save r6/r7 74 movq %r8,(%r2)+ # save r8/r9 75 movq %r10,(%r2)+ # save r10/r11 76#endif 77 clrl %r0 78 ret 79 80#ifndef __ELF__ 81ENTRY(__longjmp14, 0) 82 movl 8(%ap),%r0 # return(v) 83 movl 4(%ap),%r1 # fetch buffer 84 tstl 12(%r1) # is fp non-null? 85 beql botch 86 87#ifdef __ELF__ 88 moval $SC_LEN(%r1),%r2 # get ptr to saved registers 89 movq (%r2)+,%r6 # restore r6/r7 90 movq (%r2)+,%r8 # restore r8/r9 91 movq (%r2)+,%r10 # restore r10/r11 92#else 93loop: 94 cmpl 12(%r1),%fp # are we there yet? 95 beql done 96 blssu botch 97 moval 20(%fp),%r2 98 blbc 6(%fp),1f # was %r0 saved? 99 movl %r0,(%r2)+ 1001: 101 bbc $1,6(%fp),2f # was %r1 saved? 102 movl %r1,(%r2) 1032: 104 movab loop,16(%fp) 105 ret # pop another frame 106 107done: 108#endif /* !__ELF__ */ 109 pushl %r1 # pointer to sigcontext 110 calls $1,_C_LABEL(__sigreturn14) # restore previous context 111 # we should never return 112botch: 113 calls $0,_C_LABEL(longjmperror) 114 halt 115#endif 116