1 /* $NetBSD: setjmp.S,v 1.17 2013/11/30 20:20:42 joerg 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(__ARM_EABI__) && !defined(__ARM_PCS_VFP)
43 #include <machine/asm.h>
44 #include <machine/setjmp.h>
47 * C library -- setjmp, longjmp
50 * will generate a "return(v)" from the last call to
52 * by restoring registers from the stack.
53 * The previous signal state is restored.
57 /* Get the signal mask. */
59 #if !defined(__thumb__)
60 adds r2, r0, #(_JB_SIGMASK * 4)
63 adds r2, r2, #(_JB_SIGMASK * 4)
67 bl PLT_SYM(_C_LABEL(__sigprocmask14))
68 #if !defined(__thumb__) || defined(_ARM_ARCH_T2)
75 ldr r1, .Lsetjmp_magic
77 #if defined(__ARM_EABI__) && (!defined(__thumb__) || defined(_ARM_ARCH_T2))
80 add r2, r2, pc /* pc = &.LPIC0 */
84 #if defined(__thumb__) && defined(_ARM_ARCH_T2)
85 cbz r2, 1f /* don't save if we don't have a FPU */
87 cmp r2, #0 /* do we have a FPU? */
88 beq 1f /* no, don't save VFP registers */
91 orrs r1, r1, #(_JB_MAGIC_SETJMP ^ _JB_MAGIC_SETJMP_VFP)
92 /* change magic to VFP magic */
93 adds r2, r0, #(_JB_REG_D8 * 4)
96 str r2, [r0, #(_JB_REG_FPSCR * 4)]
98 #endif /* __ARM_EABI__ && (!__thumb__ || _ARM_ARCH_T2) */
100 str r1, [r0] /* store magic */
102 /* Store integer registers */
103 adds r0, r0, #(_JB_REG_R4 * 4)
104 #if !defined(__thumb__)
122 #if defined(__ARM_EABI__) && (!defined(__thumb__) || defined(_ARM_ARCH_T2))
125 .word REL_SYM(_libc_arm_fpu_present, .LPIC0)
126 #endif /* __ARM_EABI__ && (!__thumb__ || _ARM_ARCH_T2) */
130 #if !defined(__thumb__) || defined(_ARM_ARCH_T2)
132 ldr ip, .Lsetjmp_magic
133 bic r3, r2, #(_JB_MAGIC_SETJMP ^ _JB_MAGIC_SETJMP_VFP)
135 ldr r3, .Lsetjmp_magic
138 movs r2, #(_JB_MAGIC_SETJMP ^ _JB_MAGIC_SETJMP_VFP)
140 /* r2 is not the magic but we don't need it since we can't do VFP */
145 /* Restore the signal mask. */
148 #if !defined(__thumb__)
149 adds r1, r0, #(_JB_SIGMASK * 4)
152 adds r1, r1, #(_JB_SIGMASK * 4)
154 movs r0, #3 /* SIG_SETMASK */
155 bl PLT_SYM(_C_LABEL(__sigprocmask14))
156 #if !defined(__thumb__) || defined(_ARM_ARCH_T2)
163 #if defined(__ARM_EABI__) && (!defined(__thumb__) || defined(_ARM_ARCH_T2))
164 tst r2, #(_JB_MAGIC_SETJMP ^ _JB_MAGIC_SETJMP_VFP)
165 /* is this a VFP magic? */
166 beq 1f /* no, don't restore VFP */
167 adds r2, r0, #(_JB_REG_D8 * 4)
169 ldr r2, [r0, #(_JB_REG_FPSCR * 4)]
172 #endif /* __ARM_EABI__ && (!__thumb__ || _ARM_ARCH_T2) */
174 adds r0, r0, #(_JB_REG_R4 * 4)
175 /* Restore integer registers */
176 #if !defined(__thumb__) || defined(_ARM_ARCH_T2)
186 adds r0, r0, #4 /* skip ip(r12) */
191 /* Validate sp and lr */
192 #if defined(__thumb__) && defined(_ARM_ARCH_T2)
200 #if defined(__thumb__) && defined(_ARM_ARCH_T2)
208 /* Set return value */
210 #if !defined(__thumb__)
219 /* validation failed, die die die. */
221 bl PLT_SYM(_C_LABEL(longjmperror))
222 bl PLT_SYM(_C_LABEL(abort))
223 1: b 1b /* Cannot get here */
227 .word _JB_MAGIC_SETJMP