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__FBSDID("$FreeBSD$"); 45 46/* 47 * C library -- setjmp, longjmp 48 * 49 * longjmp(a,v) 50 * will generate a "return(v)" from the last call to 51 * setjmp(a) 52 * by restoring registers from the stack. 53 * The previous signal state is restored. 54 */ 55 56ENTRY(setjmp) 57 /* Block all signals and retrieve the old signal mask */ 58 stmfd sp!, {r0, r14} 59 add r2, r0, #(_JB_SIGMASK * 4) /* oset */ 60 mov r1, #0x00000000 /* set */ 61 mov r0, #0x00000001 /* SIG_BLOCK */ 62 bl PIC_SYM(_C_LABEL(sigprocmask), PLT) 63 ldmfd sp!, {r0, r14} 64 65 ldr r1, .Lsetjmp_magic 66 67#if __ARM_ARCH >= 6 68 add r2, r0, #(_JB_REG_D8 * 4) 69 vstmia r2, {d8-d15} 70 vmrs r2, fpscr 71 str r2, [r0, #(_JB_REG_FPSCR * 4)] 72#endif 73 74 str r1, [r0] /* store magic */ 75 76 /* Store integer registers */ 77 add r0, r0, #(_JB_REG_R4 * 4) 78#ifndef __thumb__ 79 stmia r0, {r4-r14} 80#else 81 stmia r0, {r4-r12} 82 str r13, [r0, #((_JB_REG_R13 - _JB_REG_R4) * 4)] 83 str r14, [r0, #((_JB_REG_R14 - _JB_REG_R4) * 4)] 84#endif 85 mov r0, #0x00000000 86 RET 87 88.Lsetjmp_magic: 89 .word _JB_MAGIC_SETJMP 90END(setjmp) 91 92.weak _C_LABEL(longjmp) 93.set _C_LABEL(longjmp), _C_LABEL(__longjmp) 94ENTRY(__longjmp) 95 ldr r2, [r0] 96 ldr ip, .Lsetjmp_magic 97 teq r2, ip 98 bne .Lbotch 99 100 /* Restore the signal mask. */ 101 stmfd sp!, {r0-r2, r14} 102 mov r2, #0x00000000 103 add r1, r0, #(_JB_SIGMASK * 4) /* Signal mask */ 104 mov r0, #3 /* SIG_SETMASK */ 105 bl PIC_SYM(_C_LABEL(sigprocmask), PLT) 106 ldmfd sp!, {r0-r2, r14} 107 108#if __ARM_ARCH >= 6 109 add ip, r0, #(_JB_REG_D8 * 4) 110 vldmia ip, {d8-d15} 111 ldr ip, [r0, #(_JB_REG_FPSCR * 4)] 112 vmsr fpscr, ip 113#endif 114 115 add r0, r0, #(_JB_REG_R4 * 4) 116 /* Restore integer registers */ 117#ifndef __thumb__ 118 ldmia r0, {r4-r14} 119#else 120 ldmia r0, {r4-r12} 121 ldr r13, [r0, #((_JB_REG_R13 - _JB_REG_R4) * 4)] 122 ldr r14, [r0, #((_JB_REG_R14 - _JB_REG_R4) * 4)] 123#endif 124 125 /* Validate sp and r14 */ 126 teq sp, #0 127 it ne 128 teqne r14, #0 129 it eq 130 beq .Lbotch 131 132 /* Set return value */ 133 movs r0, r1 134 it eq 135 moveq r0, #0x00000001 136 RET 137 138 /* validation failed, die die die. */ 139.Lbotch: 140 bl PIC_SYM(_C_LABEL(longjmperror), PLT) 141 bl PIC_SYM(_C_LABEL(abort), PLT) 1421: b 1b /* Cannot get here */ 143END(__longjmp) 144 145 .section .note.GNU-stack,"",%progbits 146