1/* $NetBSD: setjmp.S,v 1.14 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 .fpu vfp 40 41#include <machine/asm.h> 42#include <machine/setjmp.h> 43/* 44 * C library -- setjmp, longjmp 45 * 46 * longjmp(a,v) 47 * will generate a "return(v)" from the last call to 48 * setjmp(a) 49 * by restoring registers from the stack. 50 * The previous signal state is restored. 51 */ 52 53ENTRY(setjmp) 54 /* Block all signals and retrieve the old signal mask */ 55 stmfd sp!, {r0, r14} 56 add r2, r0, #(_JB_SIGMASK * 4) /* oset */ 57 mov r1, #0x00000000 /* set */ 58 mov r0, #0x00000001 /* SIG_BLOCK */ 59 bl PIC_SYM(_C_LABEL(sigprocmask), PLT) 60 ldmfd sp!, {r0, r14} 61 62 ldr r1, .Lsetjmp_magic 63 64#if __ARM_ARCH >= 6 && !defined(SOFTFLOAT_FOR_GCC) 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 70 71 str r1, [r0] /* store magic */ 72 73 /* Store integer registers */ 74 add r0, r0, #(_JB_REG_R4 * 4) 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 mov r0, #0x00000000 83 RET 84 85.Lsetjmp_magic: 86 .word _JB_MAGIC_SETJMP 87END(setjmp) 88 89.weak _C_LABEL(longjmp) 90.set _C_LABEL(longjmp), _C_LABEL(__longjmp) 91ENTRY(__longjmp) 92 ldr r2, [r0] 93 ldr ip, .Lsetjmp_magic 94 teq r2, ip 95 bne .Lbotch 96 97 /* Restore the signal mask. */ 98 stmfd sp!, {r0-r2, r14} 99 mov r2, #0x00000000 100 add r1, r0, #(_JB_SIGMASK * 4) /* Signal mask */ 101 mov r0, #3 /* SIG_SETMASK */ 102 bl PIC_SYM(_C_LABEL(sigprocmask), PLT) 103 ldmfd sp!, {r0-r2, r14} 104 105#if __ARM_ARCH >= 6 && !defined(SOFTFLOAT_FOR_GCC) 106 add ip, r0, #(_JB_REG_D8 * 4) 107 vldmia ip, {d8-d15} 108 ldr ip, [r0, #(_JB_REG_FPSCR * 4)] 109 vmsr fpscr, ip 110#endif 111 112 add r0, r0, #(_JB_REG_R4 * 4) 113 /* Restore integer registers */ 114#ifndef __thumb__ 115 ldmia r0, {r4-r14} 116#else 117 ldmia r0, {r4-r12} 118 ldr r13, [r0, #((_JB_REG_R13 - _JB_REG_R4) * 4)] 119 ldr r14, [r0, #((_JB_REG_R14 - _JB_REG_R4) * 4)] 120#endif 121 122 /* Validate sp and r14 */ 123 teq sp, #0 124 it ne 125 teqne r14, #0 126 it eq 127 beq .Lbotch 128 129 /* Set return value */ 130 movs r0, r1 131 it eq 132 moveq r0, #0x00000001 133 RET 134 135 /* validation failed, die die die. */ 136.Lbotch: 137 bl PIC_SYM(_C_LABEL(longjmperror), PLT) 138 bl PIC_SYM(_C_LABEL(abort), PLT) 1391: b 1b /* Cannot get here */ 140END(__longjmp) 141 142 .section .note.GNU-stack,"",%progbits 143