_setjmp.S revision 1.3.2.3
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 1.1 ragge * 3. All advertising materials mentioning features or use of this software 14 1.1 ragge * must display the following acknowledgement: 15 1.1 ragge * This product includes software developed by the University of 16 1.1 ragge * California, Berkeley and its contributors. 17 1.1 ragge * 4. Neither the name of the University nor the names of its contributors 18 1.1 ragge * may be used to endorse or promote products derived from this software 19 1.1 ragge * without specific prior written permission. 20 1.1 ragge * 21 1.1 ragge * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 1.1 ragge * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 1.1 ragge * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 1.1 ragge * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 1.1 ragge * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 1.1 ragge * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 1.1 ragge * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 1.1 ragge * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 1.1 ragge * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 1.1 ragge * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 1.1 ragge * SUCH DAMAGE. 32 1.1 ragge */ 33 1.1 ragge 34 1.1 ragge #if defined(LIBC_SCCS) && !defined(lint) 35 1.1 ragge /* .asciz "@(#)_setjmp.s 8.1 (Berkeley) 6/4/93" */ 36 1.3.2.3 nathanw .asciz "$NetBSD: _setjmp.S,v 1.3.2.3 2002/04/25 04:01:39 nathanw Exp $" 37 1.1 ragge #endif /* LIBC_SCCS and not lint */ 38 1.1 ragge 39 1.1 ragge /* 40 1.1 ragge * C library -- _setjmp, _longjmp 41 1.1 ragge * 42 1.1 ragge * _longjmp(a,v) 43 1.1 ragge * will generate a "return(v)" from 44 1.1 ragge * the last call to 45 1.1 ragge * _setjmp(a) 46 1.1 ragge * by restoring registers from the stack, 47 1.1 ragge * The previous signal state is NOT restored. 48 1.3.2.3 nathanw * 49 1.3.2.3 nathanw * Even though we don't use sigreturn14, we still store things in a sigcontext 50 1.3.2.3 nathanw * in order to be consistent. 51 1.1 ragge */ 52 1.1 ragge 53 1.1 ragge #include "DEFS.h" 54 1.1 ragge 55 1.3.2.3 nathanw ENTRY(_setjmp, R6) 56 1.3.2.1 nathanw movl 4(%ap),%r0 57 1.3.2.3 nathanw movl 12(%fp),12(%r0) # save frame pointer of caller 58 1.3.2.3 nathanw movl 16(%fp),20(%r0) # save pc of caller 59 1.3.2.3 nathanw #ifdef __ELF__ 60 1.3.2.3 nathanw movl 8(%fp),16(%r0) # save ap of caller 61 1.3.2.3 nathanw clrl %r1 # clear arg count 62 1.3.2.3 nathanw bbc $13,6(%fp),1f # was this a callg? 63 1.3.2.3 nathanw addl3 $1,(%ap),%r1 # get real arg count+1 for calls 64 1.3.2.3 nathanw 1: moval 24(%fp)[%r1],8(%r0) # save sp of caller 65 1.3.2.3 nathanw movpsl 24(%r0) # save current psl 66 1.3.2.3 nathanw movw 4(%fp),24(%r0) # save psw of caller 67 1.3.2.3 nathanw movq %r6,44(%r0) # save r6/r7 68 1.3.2.3 nathanw movq %r8,52(%r0) # save r8/r9 69 1.3.2.3 nathanw movq %r10,60(%r0) # save r10/r11 70 1.3.2.3 nathanw #endif 71 1.3.2.1 nathanw clrl %r0 72 1.1 ragge ret 73 1.1 ragge 74 1.1 ragge ENTRY(_longjmp, 0) 75 1.3.2.1 nathanw movl 8(%ap),%r0 # return(v) 76 1.3.2.1 nathanw movl 4(%ap),%r1 # fetch buffer 77 1.3.2.3 nathanw tstl 12(%r1) # is fp null 78 1.1 ragge beql botch 79 1.3.2.3 nathanw #ifdef __ELF__ 80 1.3.2.3 nathanw movq 44(%r1),%r6 # restore r6/r7 81 1.3.2.3 nathanw movq 52(%r1),%r8 # restore r8/r9 82 1.3.2.3 nathanw movq 60(%r1),%r10 # restore r10/r11 83 1.3.2.3 nathanw movl 16(%r1),%ap # restore ap 84 1.3.2.3 nathanw movl 8(%r1),%sp # restore sp 85 1.3.2.3 nathanw movl 12(%r1),%fp # restore fp 86 1.3.2.3 nathanw movq 20(%r1),-(%sp) # save pc/psl to new stack 87 1.3.2.3 nathanw rei # and go back to saved pc/psl 88 1.3.2.3 nathanw #else 89 1.1 ragge loop: 90 1.3.2.1 nathanw bitw $1,6(%fp) # %r0 saved? 91 1.1 ragge beql 1f 92 1.3.2.1 nathanw movl %r0,20(%fp) 93 1.3.2.1 nathanw bitw $2,6(%fp) # was %r1 saved? 94 1.1 ragge beql 2f 95 1.3.2.1 nathanw movl %r1,24(%fp) 96 1.1 ragge brb 2f 97 1.1 ragge 1: 98 1.3.2.1 nathanw bitw $2,6(%fp) # was %r1 saved? 99 1.1 ragge beql 2f 100 1.3.2.1 nathanw movl %r1,20(%fp) 101 1.1 ragge 2: 102 1.3.2.3 nathanw cmpl 12(%r1),12(%fp) 103 1.1 ragge beql done 104 1.1 ragge blssu botch 105 1.3.2.1 nathanw movab loop,16(%fp) 106 1.1 ragge ret # pop another frame 107 1.1 ragge 108 1.1 ragge done: 109 1.3.2.1 nathanw cmpb *16(%fp),$2 # returning to an "rei"? 110 1.1 ragge bneq 1f 111 1.3.2.1 nathanw movab 3f,16(%fp) # do return w/ psl-pc pop 112 1.1 ragge brw 2f 113 1.1 ragge 1: 114 1.3.2.1 nathanw movab 4f,16(%fp) # do standard return 115 1.1 ragge 2: 116 1.1 ragge ret # unwind stack before signals enabled 117 1.1 ragge 3: 118 1.3.2.1 nathanw addl2 $8,%sp # compensate for PSL-PC push 119 1.1 ragge 4: 120 1.3.2.3 nathanw jmp *20(%r1) # done, return.... 121 1.3.2.3 nathanw #endif /* !__ELF__ */ 122 1.1 ragge 123 1.1 ragge botch: 124 1.3 matt calls $0,_C_LABEL(longjmperror) 125 1.1 ragge halt 126
Indexes created Fri Oct 03 02:09:57 GMT 2025