_setjmp.S revision 1.9.52.1
1 1.1 ragge /* 2 1.1 ragge * Copyright (c) 1980, 1993 3 1.1 ragge * The Regents of the University of California. All rights reserved. 4 1.1 ragge * 5 1.1 ragge * Redistribution and use in source and binary forms, with or without 6 1.1 ragge * modification, are permitted provided that the following conditions 7 1.1 ragge * are met: 8 1.1 ragge * 1. Redistributions of source code must retain the above copyright 9 1.1 ragge * notice, this list of conditions and the following disclaimer. 10 1.1 ragge * 2. Redistributions in binary form must reproduce the above copyright 11 1.1 ragge * notice, this list of conditions and the following disclaimer in the 12 1.1 ragge * documentation and/or other materials provided with the distribution. 13 1.9 agc * 3. Neither the name of the University nor the names of its contributors 14 1.1 ragge * may be used to endorse or promote products derived from this software 15 1.1 ragge * without specific prior written permission. 16 1.1 ragge * 17 1.1 ragge * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 1.1 ragge * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 1.1 ragge * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 1.1 ragge * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 1.1 ragge * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 1.1 ragge * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 1.1 ragge * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 1.1 ragge * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 1.1 ragge * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 1.1 ragge * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 1.1 ragge * SUCH DAMAGE. 28 1.1 ragge */ 29 1.1 ragge 30 1.9.52.1 bouyer #include "DEFS.h" 31 1.9.52.1 bouyer 32 1.1 ragge #if defined(LIBC_SCCS) && !defined(lint) 33 1.1 ragge /* .asciz "@(#)_setjmp.s 8.1 (Berkeley) 6/4/93" */ 34 1.9.52.1 bouyer RCSID("$NetBSD: _setjmp.S,v 1.9.52.1 2011/02/08 16:18:57 bouyer Exp $") 35 1.1 ragge #endif /* LIBC_SCCS and not lint */ 36 1.1 ragge 37 1.1 ragge /* 38 1.1 ragge * C library -- _setjmp, _longjmp 39 1.1 ragge * 40 1.1 ragge * _longjmp(a,v) 41 1.1 ragge * will generate a "return(v)" from 42 1.1 ragge * the last call to 43 1.1 ragge * _setjmp(a) 44 1.1 ragge * by restoring registers from the stack, 45 1.1 ragge * The previous signal state is NOT restored. 46 1.6 matt * 47 1.6 matt * Even though we don't use sigreturn14, we still store things in a sigcontext 48 1.6 matt * in order to be consistent. 49 1.1 ragge */ 50 1.1 ragge 51 1.8 matt ENTRY(_setjmp, R6) 52 1.4 matt movl 4(%ap),%r0 53 1.6 matt movl 12(%fp),12(%r0) # save frame pointer of caller 54 1.6 matt movl 16(%fp),20(%r0) # save pc of caller 55 1.6 matt movl 8(%fp),16(%r0) # save ap of caller 56 1.6 matt clrl %r1 # clear arg count 57 1.6 matt bbc $13,6(%fp),1f # was this a callg? 58 1.6 matt addl3 $1,(%ap),%r1 # get real arg count+1 for calls 59 1.8 matt 1: moval 24(%fp)[%r1],8(%r0) # save sp of caller 60 1.7 matt movpsl 24(%r0) # save current psl 61 1.7 matt movw 4(%fp),24(%r0) # save psw of caller 62 1.6 matt movq %r6,44(%r0) # save r6/r7 63 1.6 matt movq %r8,52(%r0) # save r8/r9 64 1.6 matt movq %r10,60(%r0) # save r10/r11 65 1.4 matt clrl %r0 66 1.1 ragge ret 67 1.9.52.1 bouyer END(_setjmp) 68 1.1 ragge 69 1.1 ragge ENTRY(_longjmp, 0) 70 1.4 matt movl 8(%ap),%r0 # return(v) 71 1.4 matt movl 4(%ap),%r1 # fetch buffer 72 1.6 matt tstl 12(%r1) # is fp null 73 1.1 ragge beql botch 74 1.6 matt movq 44(%r1),%r6 # restore r6/r7 75 1.6 matt movq 52(%r1),%r8 # restore r8/r9 76 1.6 matt movq 60(%r1),%r10 # restore r10/r11 77 1.6 matt movl 16(%r1),%ap # restore ap 78 1.8 matt movl 8(%r1),%sp # restore sp 79 1.8 matt movl 12(%r1),%fp # restore fp 80 1.6 matt movq 20(%r1),-(%sp) # save pc/psl to new stack 81 1.6 matt rei # and go back to saved pc/psl 82 1.1 ragge 83 1.1 ragge botch: 84 1.3 matt calls $0,_C_LABEL(longjmperror) 85 1.1 ragge halt 86 1.9.52.1 bouyer END(_longjmp) 87
Indexes created Thu Oct 02 14:10:14 GMT 2025