1/* $OpenBSD: _setjmp.S,v 1.4 2020/10/19 08:47:28 kettenis Exp $ */ 2/*- 3 * Copyright (c) 2014 Andrew Turner 4 * Copyright (c) 2014 The FreeBSD Foundation 5 * All rights reserved. 6 * 7 * Portions of this software were developed by Andrew Turner 8 * under sponsorship from the FreeBSD Foundation 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 */ 32 33#include "DEFS.h" 34#include <machine/setjmp.h> 35 36ENTRY(_setjmp) 37 RETGUARD_SETUP(_setjmp, x15) 38 /* Store the magic value and stack pointer */ 39 ldr x8, .Lmagic 40 mov x9, sp 41 stp x8, x9, [x0], #16 42 43 /* Store the general purpose registers and lr */ 44 stp x19, x20, [x0], #16 45 stp x21, x22, [x0], #16 46 stp x23, x24, [x0], #16 47 stp x25, x26, [x0], #16 48 stp x27, x28, [x0], #16 49 stp x29, x30, [x0], #16 50 51#ifndef _STANDALONE 52 /* Store the vfp registers */ 53 stp d8, d9, [x0], #16 54 stp d10, d11, [x0], #16 55 stp d12, d13, [x0], #16 56 stp d14, d15, [x0], #16 57 mrs x1, fpcr 58 str x1, [x0] 59#endif 60 61 /* Return value */ 62 mov x0, #0 63 RETGUARD_CHECK(_setjmp, x15) 64 ret 65 .align 3 66.Lmagic: 67 .quad _JB_MAGIC__SETJMP 68END_STRONG(_setjmp) 69 70ENTRY(_longjmp) 71 RETGUARD_SYMBOL(_longjmp) 72 RETGUARD_LOAD_RANDOM(_longjmp, x15) 73 /* Check the magic value */ 74 ldr x8, [x0], #8 75 ldr x9, .Lmagic 76 cmp x8, x9 77 b.ne botch 78 79 /* Restore the stack pointer */ 80 ldr x8, [x0], #8 81 mov sp, x8 82 83 /* Restore the general purpose registers and lr */ 84 ldp x19, x20, [x0], #16 85 ldp x21, x22, [x0], #16 86 ldp x23, x24, [x0], #16 87 ldp x25, x26, [x0], #16 88 ldp x27, x28, [x0], #16 89 ldp x29, x30, [x0], #16 90 RETGUARD_CALC_COOKIE(x15) 91 92#ifndef _STANDALONE 93 /* Restore the vfp registers */ 94 ldp d8, d9, [x0], #16 95 ldp d10, d11, [x0], #16 96 ldp d12, d13, [x0], #16 97 ldp d14, d15, [x0], #16 98 ldr x2, [x0] 99 msr fpcr, x2 100#endif 101 102 /* Load the return value */ 103 cmp w1, #0 104 csinc w0, w1, wzr, ne 105 RETGUARD_CHECK(_longjmp, x15) 106 ret 107 108botch: 109 bl _HIDDEN(abort) 110END_STRONG(_longjmp) 111