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/* 31 * C library -- setjmp, longjmp 32 * 33 * longjmp(a,v) 34 * will generate a "return(v)" from 35 * the last call to 36 * setjmp(a) 37 * by restoring registers from the stack, 38 * and a struct sigcontext, see <signal.h> 39 */ 40 41#include "DEFS.h" 42#include "assym.h" 43 44#if defined(LIBC_SCCS) && !defined(lint) 45 /* .asciz "@(#)setjmp.s 8.1 (Berkeley) 6/4/93" */ 46RCSID("$NetBSD: __setjmp14.S,v 1.11 2011/01/25 02:38:15 matt Exp $") 47#endif /* LIBC_SCCS and not lint */ 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 addl3 $SC_LEN,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 clrl %r0 76 ret 77END(__setjmp14) 78