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 * C library -- _setjmp, _longjmp 47 * 48 * _longjmp(a,v) 49 * will generate a "return(v)" from the last call to 50 * _setjmp(a) 51 * by restoring registers from the stack. 52 * The previous signal state is NOT restored. 53 * 54 * Note: r0 is the return value 55 * r1-r3,ip are scratch registers in functions 56 */ 57 58ENTRY(_setjmp) 59 ldr r1, .L_setjmp_magic 60 61#if !defined(_STANDALONE) && !defined(SOFTFLOAT_FOR_GCC) 62 add r2, r0, #(_JB_REG_D8 * 4) 63 vstmia r2, {d8-d15} 64 vmrs r2, fpscr 65 str r2, [r0, #(_JB_REG_FPSCR * 4)] 66#endif /* !_STANDALONE && !SOFTFLOAT_FOR_GCC */ 67 68 str r1, [r0] 69 70 add r0, r0, #(_JB_REG_R4 * 4) 71 /* Store integer registers */ 72#ifndef __thumb__ 73 stmia r0, {r4-r14} 74#else 75 stmia r0, {r4-r12} 76 str r13, [r0, #((_JB_REG_R13 - _JB_REG_R4) * 4)] 77 str r14, [r0, #((_JB_REG_R14 - _JB_REG_R4) * 4)] 78#endif 79 80 mov r0, #0x00000000 81 RET 82END(_setjmp) 83 84.L_setjmp_magic: 85 .word _JB_MAGIC__SETJMP 86 87WEAK_ALIAS(___longjmp, _longjmp) 88ENTRY(_longjmp) 89 ldr r2, [r0] /* get magic from jmp_buf */ 90 ldr ip, .L_setjmp_magic /* load magic */ 91 teq ip, r2 /* magic correct? */ 92 bne botch /* no, botch */ 93 94#if !defined(_STANDALONE) && !defined(SOFTFLOAT_FOR_GCC) 95 add ip, r0, #(_JB_REG_D8 * 4) 96 vldmia ip, {d8-d15} 97 ldr ip, [r0, #(_JB_REG_FPSCR * 4)] 98 vmsr fpscr, ip 99#endif /* !_STANDALONE && !SOFTFLOAT_FOR_GCC */ 100 101 add r0, r0, #(_JB_REG_R4 * 4) 102 /* Restore integer registers */ 103#ifndef __thumb__ 104 ldmia r0, {r4-r14} 105#else 106 ldmia r0, {r4-r12} 107 ldr r13, [r0, #((_JB_REG_R13 - _JB_REG_R4) * 4)] 108 ldr r14, [r0, #((_JB_REG_R14 - _JB_REG_R4) * 4)] 109#endif 110 111 /* Validate sp and r14 */ 112 teq sp, #0 113 it ne 114 teqne r14, #0 115 it eq 116 beq botch 117 118 /* Set return value */ 119 movs r0, r1 120 it eq 121 moveq r0, #0x00000001 122 RET 123 124 /* validation failed, die die die. */ 125botch: 126#if !defined(_STANDALONE) 127 bl PIC_SYM(_C_LABEL(longjmperror), PLT) 128 bl PIC_SYM(_C_LABEL(abort), PLT) 1291: b 1b /* Cannot get here */ 130#else 131 b . 132#endif 133END(_longjmp) 134 135 .section .note.GNU-stack,"",%progbits 136