1 /* $NetBSD: setjmp.S,v 1.12 2024/07/17 07:11:57 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 1.12 2024/07/17 07:11:57 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 #0, r4 /* how is ignored */ 62 mov #0, r5 /* set = NULL */ 63 1: CALL r0 64 add #(_JB_SIGMASK * 4), r6 /* oset = &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 // return value can't be zero, adjust to 1 if it is 94 tst r5, r5 95 bf/s 0f 96 mov.l @(_JB_REG_PR * 4, r4), r0 97 mov #1, r5 98 0: 99 // restore context first (callee-saved regs) 100 mov.l @(_JB_REG_R8 * 4, r4), r8 101 mov.l @(_JB_REG_R9 * 4, r4), r9 102 mov.l @(_JB_REG_R10 * 4, r4), r10 103 mov.l @(_JB_REG_R11 * 4, r4), r11 104 mov.l @(_JB_REG_R12 * 4, r4), r12 105 mov.l @(_JB_REG_R13 * 4, r4), r13 106 mov.l @(_JB_REG_R14 * 4, r4), r14 107 mov.l @(_JB_REG_R15 * 4, r4), r15 108 109 // create a frame 110 mov.l r5, @-sp // future return value (pre-adjusted) 111 mov.l r0, @-sp // caller's PR from the jumpbuf 112 PIC_PROLOGUE(.L_got_2) 113 114 // restore signal mask from &a[_JB_SIGMASK] 115 mov #0, r6 // oset = NULL 116 mov r4, r5 117 mov.l .L___sigprocmask14_2, r0 118 add #(_JB_SIGMASK * 4), r5 // set = &a[_JB_SIGMASK] 119 1: CALL r0 120 mov #3, r4 // how = SIG_SETMASK 121 122 // return "from" setjmp 123 PIC_EPILOGUE 124 lds.l @sp+, pr 125 rts 126 mov.l @sp+, r0 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(__longjmp14) 132
Indexes created Sun Sep 21 19:09:51 GMT 2025