setjmp.S revision 1.8
1 /* $NetBSD: setjmp.S,v 1.8 2006/01/05 03:03:52 uwe Exp $ */ 2 3 /*- 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * from: @(#)setjmp.s 5.1 (Berkeley) 4/23/90 35 */ 36 37 #include <machine/asm.h> 38 #include <machine/setjmp.h> 39 40 #if defined(LIBC_SCCS) 41 RCSID("$NetBSD: setjmp.S,v 1.8 2006/01/05 03:03:52 uwe Exp $") 42 #endif 43 44 /* 45 * C library -- setjmp, longjmp 46 * 47 * longjmp(a,v) 48 * will generate a "return(v)" from the last call to 49 * setjmp(a) 50 * by restoring registers from the stack. 51 * The previous signal state is restored. 52 */ 53 54 ENTRY(__setjmp14) 55 PIC_PROLOGUE(.L_got_1) 56 sts.l pr, @-sp 57 mov.l r4, @-sp 58 59 mov.l .L___sigprocmask14_1, r0 60 mov r4, r6 61 mov #1, r4 /* how = SIG_BLOCK */ 62 mov #0, r5 /* new = NULL */ 63 1: CALL r0 64 add #(_JB_SIGMASK * 4), r6 /* old = &sigmask */ 65 66 mov.l @sp+, r4 67 lds.l @sp+, pr 68 PIC_EPILOGUE 69 70 /* identical to _setjmp except that _JB_HAS_MASK is non-zero */ 71 add #((_JB_HAS_MASK + 1) * 4), r4 72 mov #1, r0 73 mov.l r0, @-r4 /* has signal mask */ 74 mov.l r15, @-r4 75 mov.l r14, @-r4 76 mov.l r13, @-r4 77 mov.l r12, @-r4 78 mov.l r11, @-r4 79 mov.l r10, @-r4 80 mov.l r9, @-r4 81 mov.l r8, @-r4 82 sts.l pr, @-r4 83 rts 84 xor r0, r0 85 86 .align 2 87 .L_got_1: PIC_GOT_DATUM 88 .L___sigprocmask14_1: CALL_DATUM(_C_LABEL(__sigprocmask14), 1b) 89 SET_ENTRY_SIZE(__setjmp14) 90 91 92 ENTRY(__longjmp14) 93 PIC_PROLOGUE(.L_got_2) 94 /* we won't return here, so we don't need to save pr */ 95 mov.l r4, @-sp 96 mov.l r5, @-sp 97 98 mov.l .L___sigprocmask14_2, r0 99 mov r4, r5 100 mov #3, r4 /* how = SIG_SETMASK */ 101 add #(_JB_SIGMASK * 4), r5 /* new = &sigmask */ 102 1: CALL r0 103 mov #0, r6 /* old = NULL */ 104 105 mov.l @sp+, r5 106 mov.l @sp+, r4 107 PIC_EPILOGUE 108 109 /* identical to _longjmp */ 110 lds.l @r4+, pr 111 mov.l @r4+, r8 112 mov.l @r4+, r9 113 mov.l @r4+, r10 114 mov.l @r4+, r11 115 mov.l @r4+, r12 116 mov.l @r4+, r13 117 mov.l @r4+, r14 118 mov.l @r4+, r15 119 120 mov r5, r0 121 tst r0, r0 /* make sure return value is non-zero */ 122 bf .L0 123 add #1, r0 124 .L0: 125 rts 126 nop 127 128 .align 2 129 .L_got_2: PIC_GOT_DATUM 130 .L___sigprocmask14_2: CALL_DATUM(_C_LABEL(__sigprocmask14), 1b) 131 SET_ENTRY_SIZE(__setjmp14) 132
Indexes created Sun Sep 28 07:09:56 GMT 2025