_setjmp.S revision 1.7.2.2
1 1.7.2.2 tls /* $NetBSD: _setjmp.S,v 1.7.2.2 2013/06/23 06:21:04 tls Exp $ */ 2 1.1 bjh21 3 1.1 bjh21 /* 4 1.1 bjh21 * Copyright (c) 1997 Mark Brinicombe 5 1.1 bjh21 * All rights reserved. 6 1.1 bjh21 * 7 1.1 bjh21 * Redistribution and use in source and binary forms, with or without 8 1.1 bjh21 * modification, are permitted provided that the following conditions 9 1.1 bjh21 * are met: 10 1.1 bjh21 * 1. Redistributions of source code must retain the above copyright 11 1.1 bjh21 * notice, this list of conditions and the following disclaimer. 12 1.1 bjh21 * 2. Redistributions in binary form must reproduce the above copyright 13 1.1 bjh21 * notice, this list of conditions and the following disclaimer in the 14 1.1 bjh21 * documentation and/or other materials provided with the distribution. 15 1.1 bjh21 * 3. All advertising materials mentioning features or use of this software 16 1.1 bjh21 * must display the following acknowledgement: 17 1.1 bjh21 * This product includes software developed by Mark Brinicombe 18 1.1 bjh21 * 4. Neither the name of the University nor the names of its contributors 19 1.1 bjh21 * may be used to endorse or promote products derived from this software 20 1.1 bjh21 * without specific prior written permission. 21 1.1 bjh21 * 22 1.1 bjh21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 23 1.1 bjh21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 1.1 bjh21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 1.1 bjh21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 26 1.1 bjh21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 1.1 bjh21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 1.1 bjh21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 1.1 bjh21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 1.1 bjh21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 1.1 bjh21 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 1.1 bjh21 * SUCH DAMAGE. 33 1.1 bjh21 */ 34 1.1 bjh21 35 1.7.2.1 tls #if !defined(__SOFTFP__) && !defined(__VFP_FP__) && !defined(__ARM_PCS) 36 1.7.2.1 tls #error FPA is not supported anymore 37 1.7.2.1 tls #endif 38 1.7.2.1 tls 39 1.7.2.1 tls #ifdef __ARM_EABI__ 40 1.7.2.1 tls .fpu vfp 41 1.7.2.1 tls #endif 42 1.7.2.1 tls 43 1.1 bjh21 #include <machine/asm.h> 44 1.1 bjh21 #include <machine/setjmp.h> 45 1.1 bjh21 46 1.1 bjh21 /* 47 1.1 bjh21 * C library -- _setjmp, _longjmp 48 1.1 bjh21 * 49 1.1 bjh21 * _longjmp(a,v) 50 1.1 bjh21 * will generate a "return(v)" from the last call to 51 1.1 bjh21 * _setjmp(a) 52 1.1 bjh21 * by restoring registers from the stack. 53 1.1 bjh21 * The previous signal state is NOT restored. 54 1.1 bjh21 * 55 1.1 bjh21 * Note: r0 is the return value 56 1.7.2.1 tls * r1-r3,ip are scratch registers in functions 57 1.1 bjh21 */ 58 1.1 bjh21 59 1.1 bjh21 ENTRY(_setjmp) 60 1.4 thorpej ldr r1, .L_setjmp_magic 61 1.7.2.1 tls 62 1.7.2.1 tls #ifdef __ARM_EABI__ 63 1.7.2.1 tls ldr r2, .Lfpu_present 64 1.7.2.1 tls #ifdef PIC 65 1.7.2.1 tls GOT_INIT(r3, .L_setjmp_got, .L_setjmp_gotinit) 66 1.7.2.1 tls ldr r2, [r2, r3] 67 1.1 bjh21 #else 68 1.7.2.1 tls ldr r2, [r2] 69 1.7.2.1 tls #endif 70 1.7.2.1 tls teq r2, #0 /* do we have a FPU? */ 71 1.7.2.1 tls beq 1f /* no, don't save VFP registers */ 72 1.7.2.1 tls 73 1.7.2.1 tls orr r1, r1, #(_JB_MAGIC__SETJMP ^ _JB_MAGIC__SETJMP_VFP) 74 1.7.2.1 tls /* change magic to VFP magic */ 75 1.7.2.1 tls add r2, r0, #(_JB_REG_D8 * 4) 76 1.7.2.1 tls vstmia r2, {d8-d15} 77 1.7.2.1 tls vmrs r2, fpscr 78 1.7.2.1 tls str r2, [r0, #(_JB_REG_FPSCR * 4)] 79 1.7.2.1 tls 1: 80 1.7.2.1 tls #endif /* __ARM_EABI__ */ 81 1.7.2.1 tls 82 1.7.2.1 tls str r1, [r0] 83 1.7.2.1 tls 84 1.7.2.1 tls add r0, r0, #(_JB_REG_R4 * 4) 85 1.1 bjh21 /* Store integer registers */ 86 1.1 bjh21 stmia r0, {r4-r14} 87 1.1 bjh21 88 1.1 bjh21 mov r0, #0x00000000 89 1.6 rearnsha RET 90 1.1 bjh21 91 1.4 thorpej .L_setjmp_magic: 92 1.1 bjh21 .word _JB_MAGIC__SETJMP 93 1.7.2.1 tls #ifdef __ARM_EABI__ 94 1.7.2.1 tls GOT_INITSYM(.L_setjmp_got, .L_setjmp_gotinit) 95 1.7.2.1 tls .Lfpu_present: 96 1.7.2.1 tls .word PIC_SYM(_libc_arm_fpu_present, GOTOFF) 97 1.7.2.1 tls #endif /* __ARM_EABI__ */ 98 1.1 bjh21 99 1.1 bjh21 ENTRY(_longjmp) 100 1.7.2.1 tls ldr r2, [r0] /* get magic from jmp_buf */ 101 1.7.2.1 tls bic r3, r2, #(_JB_MAGIC__SETJMP ^ _JB_MAGIC__SETJMP_VFP) 102 1.7.2.1 tls /* ignore VFP-ness of magic */ 103 1.7.2.1 tls ldr ip, .L_setjmp_magic /* load magic */ 104 1.7.2.1 tls teq ip, r3 /* magic correct? */ 105 1.7.2.1 tls bne botch /* no, botch */ 106 1.7.2.1 tls 107 1.7.2.1 tls #ifdef __ARM_EABI__ 108 1.7.2.1 tls teq r3, r2 /* did magic change? */ 109 1.7.2.1 tls beq 1f /* no, don't restore VFP */ 110 1.7.2.2 tls add ip, r0, #(_JB_REG_D8 * 4) 111 1.7.2.2 tls vldmia ip, {d8-d15} 112 1.7.2.2 tls ldr ip, [r0, #(_JB_REG_FPSCR * 4)] 113 1.7.2.2 tls vmsr fpscr, ip 114 1.7.2.1 tls 1: 115 1.7.2.1 tls #endif /* __ARM_EABI__ */ 116 1.7.2.1 tls 117 1.7.2.1 tls add r0, r0, #(_JB_REG_R4 * 4) 118 1.1 bjh21 /* Restore integer registers */ 119 1.1 bjh21 ldmia r0, {r4-r14} 120 1.1 bjh21 121 1.3 chris /* Validate sp and r14 */ 122 1.3 chris teq sp, #0 123 1.3 chris teqne r14, #0 124 1.1 bjh21 beq botch 125 1.1 bjh21 126 1.1 bjh21 /* Set return value */ 127 1.7.2.2 tls movs r0, r1 128 1.1 bjh21 moveq r0, #0x00000001 129 1.6 rearnsha RET 130 1.1 bjh21 131 1.1 bjh21 /* validation failed, die die die. */ 132 1.1 bjh21 botch: 133 1.2 matt bl PIC_SYM(_C_LABEL(longjmperror), PLT) 134 1.2 matt bl PIC_SYM(_C_LABEL(abort), PLT) 135 1.1 bjh21 b . - 8 /* Cannot get here */ 136
Indexes created Fri Oct 03 15:10:06 GMT 2025