1 /* $NetBSD: _setjmp.S,v 1.12 2013/04/19 13:45:45 matt Exp $ */
4 * Copyright (c) 1997 Mark Brinicombe
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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
35 #if !defined(__SOFTFP__) && !defined(__VFP_FP__) && !defined(__ARM_PCS)
36 #error FPA is not supported anymore
39 #if !defined(_STANDALONE)
43 #include <machine/asm.h>
44 #include <machine/setjmp.h>
46 __FBSDID("$FreeBSD$");
49 * C library -- _setjmp, _longjmp
52 * will generate a "return(v)" from the last call to
54 * by restoring registers from the stack.
55 * The previous signal state is NOT restored.
57 * Note: r0 is the return value
58 * r1-r3,ip are scratch registers in functions
62 ldr r1, .L_setjmp_magic
64 #if !defined(_STANDALONE) && __ARM_ARCH >= 6 && !defined(SOFTFLOAT_FOR_GCC)
65 add r2, r0, #(_JB_REG_D8 * 4)
68 str r2, [r0, #(_JB_REG_FPSCR * 4)]
69 #endif /* !_STANDALONE && __ARM_ARCH >= 6 */
73 add r0, r0, #(_JB_REG_R4 * 4)
74 /* Store integer registers */
79 str r13, [r0, #((_JB_REG_R13 - _JB_REG_R4) * 4)]
80 str r14, [r0, #((_JB_REG_R14 - _JB_REG_R4) * 4)]
88 .word _JB_MAGIC__SETJMP
90 WEAK_ALIAS(___longjmp, _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 */
97 #if !defined(_STANDALONE) && __ARM_ARCH >= 6 && !defined(SOFTFLOAT_FOR_GCC)
98 add ip, r0, #(_JB_REG_D8 * 4)
100 ldr ip, [r0, #(_JB_REG_FPSCR * 4)]
102 #endif /* !_STANDALONE && __ARM_ARCH >= 6 */
104 add r0, r0, #(_JB_REG_R4 * 4)
105 /* Restore integer registers */
110 ldr r13, [r0, #((_JB_REG_R13 - _JB_REG_R4) * 4)]
111 ldr r14, [r0, #((_JB_REG_R14 - _JB_REG_R4) * 4)]
114 /* Validate sp and r14 */
121 /* Set return value */
124 moveq r0, #0x00000001
127 /* validation failed, die die die. */
129 #if !defined(_STANDALONE)
130 bl PIC_SYM(_C_LABEL(longjmperror), PLT)
131 bl PIC_SYM(_C_LABEL(abort), PLT)
132 1: b 1b /* Cannot get here */
138 .section .note.GNU-stack,"",%progbits