1/* $NetBSD: _setjmp.S,v 1.12 2013/04/19 13:45:45 matt Exp $ */ 2 3/* 4 * Copyright (c) 1997 Mark Brinicombe 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Mark Brinicombe 18 * 4. 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 AUTHOR 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 AUTHOR 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 35#if !defined(__SOFTFP__) && !defined(__VFP_FP__) && !defined(__ARM_PCS) 36#error FPA is not supported anymore 37#endif 38 39#if !defined(_STANDALONE) 40 .fpu vfp 41#endif 42 43#include <machine/asm.h> 44#include <machine/setjmp.h> 45 46__FBSDID("$FreeBSD$"); 47 48/* 49 * C library -- _setjmp, _longjmp 50 * 51 * _longjmp(a,v) 52 * will generate a "return(v)" from the last call to 53 * _setjmp(a) 54 * by restoring registers from the stack. 55 * The previous signal state is NOT restored. 56 * 57 * Note: r0 is the return value 58 * r1-r3,ip are scratch registers in functions 59 */ 60 61ENTRY(_setjmp) 62 ldr r1, .L_setjmp_magic 63 64#if !defined(_STANDALONE) && __ARM_ARCH >= 6 65 add r2, r0, #(_JB_REG_D8 * 4) 66 vstmia r2, {d8-d15} 67 vmrs r2, fpscr 68 str r2, [r0, #(_JB_REG_FPSCR * 4)] 69#endif /* !_STANDALONE && __ARM_ARCH >= 6 */ 70 71 str r1, [r0] 72 73 add r0, r0, #(_JB_REG_R4 * 4) 74 /* Store integer registers */ 75#ifndef __thumb__ 76 stmia r0, {r4-r14} 77#else 78 stmia r0, {r4-r12} 79 str r13, [r0, #((_JB_REG_R13 - _JB_REG_R4) * 4)] 80 str r14, [r0, #((_JB_REG_R14 - _JB_REG_R4) * 4)] 81#endif 82 83 mov r0, #0x00000000 84 RET 85END(_setjmp) 86 87.L_setjmp_magic: 88 .word _JB_MAGIC__SETJMP 89 90WEAK_ALIAS(___longjmp, _longjmp) 91ENTRY(_longjmp) 92 ldr r2, [r0] /* get magic from jmp_buf */ 93 ldr ip, .L_setjmp_magic /* load magic */ 94 teq ip, r2 /* magic correct? */ 95 bne botch /* no, botch */ 96 97#if !defined(_STANDALONE) && __ARM_ARCH >= 6 98 add ip, r0, #(_JB_REG_D8 * 4) 99 vldmia ip, {d8-d15} 100 ldr ip, [r0, #(_JB_REG_FPSCR * 4)] 101 vmsr fpscr, ip 102#endif /* !_STANDALONE && __ARM_ARCH >= 6 */ 103 104 add r0, r0, #(_JB_REG_R4 * 4) 105 /* Restore integer registers */ 106#ifndef __thumb__ 107 ldmia r0, {r4-r14} 108#else 109 ldmia r0, {r4-r12} 110 ldr r13, [r0, #((_JB_REG_R13 - _JB_REG_R4) * 4)] 111 ldr r14, [r0, #((_JB_REG_R14 - _JB_REG_R4) * 4)] 112#endif 113 114 /* Validate sp and r14 */ 115 teq sp, #0 116 it ne 117 teqne r14, #0 118 it eq 119 beq botch 120 121 /* Set return value */ 122 movs r0, r1 123 it eq 124 moveq r0, #0x00000001 125 RET 126 127 /* validation failed, die die die. */ 128botch: 129#if !defined(_STANDALONE) 130 bl PIC_SYM(_C_LABEL(longjmperror), PLT) 131 bl PIC_SYM(_C_LABEL(abort), PLT) 1321: b 1b /* Cannot get here */ 133#else 134 b . 135#endif 136END(_longjmp) 137 138 .section .note.GNU-stack,"",%progbits 139