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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#if defined(LIBC_SCCS) && !defined(lint) 35 /* .asciz "@(#)setjmp.s 8.1 (Berkeley) 6/4/93" */ 36 .asciz "$NetBSD: __setjmp14.S,v 1.7 2002/03/30 05:32:32 matt Exp $" 37#endif /* LIBC_SCCS and not lint */ 38 39/* 40 * C library -- setjmp, longjmp 41 * 42 * longjmp(a,v) 43 * will generate a "return(v)" from 44 * the last call to 45 * setjmp(a) 46 * by restoring registers from the stack, 47 * and a struct sigcontext, see <signal.h> 48 */ 49 50#include "DEFS.h" 51 52ENTRY(__setjmp14, R6) 53 movl 4(%ap),%r2 # construct sigcontext 54 subl2 $12,%sp # space for current struct sigstack 55 pushl %sp # get current values 56 pushl $0 # no new values 57 calls $4,_C_LABEL(__sigaltstack14) # pop args plus signal stack value 58 movl 4(%ap),%r2 # construct sigcontext 59 movl (%sp)+,(%r2) # save onsigstack status of caller 60 pushal 28(%r2) 61 pushl $0 62 pushl $0 63 calls $3,_C_LABEL(__sigprocmask14) # get signal mask 64 addl3 $8,4(%ap),%r2 # point to sp in signal context 65 clrl %r0 # assume no stack arguments 66 bbc $13,6(%fp),1f # handle callg 67 addl3 $1,(%ap),%r0 # get argument count +1 if calls 681: moval 24(%fp)[%r0],(%r2)+ # save sp of caller 69 movl 12(%fp),(%r2)+ # save frame pointer of caller 70 movl 8(%fp),(%r2)+ # save argument pointer of caller 71 movl 16(%fp),(%r2)+ # save pc of caller 72 movpsl (%r2) # save current psl 73 movw 4(%fp),(%r2) # save psw of caller 74#ifdef __ELF__ 75 addl3 $44,4(%ap),%r2 # point to past signal context 76 movq %r6,(%r2)+ # save r6/r7 77 movq %r8,(%r2)+ # save r8/r9 78 movq %r10,(%r2)+ # save r10/r11 79#endif 80 clrl %r0 81 ret 82 83ENTRY(__longjmp14, 0) 84 movl 8(%ap),%r0 # return(v) 85 movl 4(%ap),%r1 # fetch buffer 86 tstl 12(%r1) # is fp non-null? 87 beql botch 88 89#ifdef __ELF__ 90 moval 44(%r1),%r2 # get ptr to saved registers 91 movq (%r2)+,%r6 # restore r6/r7 92 movq (%r2)+,%r8 # restore r8/r9 93 movq (%r2)+,%r10 # restore r10/r11 94#else 95loop: 96 cmpl 12(%r1),%fp # are we there yet? 97 beql done 98 blssu botch 99 moval 20(%fp),%r2 100 blbc 6(%fp),1f # was %r0 saved? 101 movl %r0,(%r2)+ 1021: 103 bbc $1,6(%fp),2f # was %r1 saved? 104 movl %r1,(%r2) 1052: 106 movab loop,16(%fp) 107 ret # pop another frame 108 109done: 110#endif /* !__ELF__ */ 111 pushl %r1 # pointer to sigcontext 112 calls $1,_C_LABEL(__sigreturn14) # restore previous context 113 # we should never return 114botch: 115 calls $0,_C_LABEL(longjmperror) 116 halt 117