1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
/* $NetBSD: setjmp.S,v 1.14 2013/04/19 13:45:45 matt Exp $ */
/*
* Copyright (c) 1997 Mark Brinicombe
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Mark Brinicombe
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if !defined(__SOFTFP__) && !defined(__VFP_FP__) && !defined(__ARM_PCS)
#error FPA is not supported anymore
#endif
#ifdef __ARM_EABI__
.fpu vfp
#endif
#include <machine/asm.h>
#include <machine/setjmp.h>
__FBSDID("$FreeBSD$");
/*
* C library -- setjmp, longjmp
*
* longjmp(a,v)
* will generate a "return(v)" from the last call to
* setjmp(a)
* by restoring registers from the stack.
* The previous signal state is restored.
*/
ENTRY(setjmp)
/* Block all signals and retrieve the old signal mask */
stmfd sp!, {r0, r14}
add r2, r0, #(_JB_SIGMASK * 4) /* oset */
mov r1, #0x00000000 /* set */
mov r0, #0x00000001 /* SIG_BLOCK */
bl PIC_SYM(_C_LABEL(sigprocmask), PLT)
ldmfd sp!, {r0, r14}
ldr r1, .Lsetjmp_magic
#ifdef __ARM_EABI__
ldr r2, .Lfpu_present
#ifdef PIC
GOT_INIT(r3, .Lsetjmp_got, .Lsetjmp_gotinit)
ldr r2, [r2, r3]
#else
ldr r2, [r2]
#endif
teq r2, #0 /* do we have a FPU? */
beq 1f /* no, don't save VFP registers */
orr r1, r1, #(_JB_MAGIC_SETJMP ^ _JB_MAGIC_SETJMP_VFP)
/* change magic to VFP magic */
add r2, r0, #(_JB_REG_D8 * 4)
vstmia r2, {d8-d15}
vmrs r2, fpscr
str r2, [r0, #(_JB_REG_FPSCR * 4)]
1:
#endif /* __ARM_EABI__ */
str r1, [r0] /* store magic */
/* Store integer registers */
add r0, r0, #(_JB_REG_R4 * 4)
#ifndef __thumb__
stmia r0, {r4-r14}
#else
stmia r0, {r4-r12}
str r13, [r0, #((_JB_REG_R13 - _JB_REG_R4) * 4)]
str r14, [r0, #((_JB_REG_R14 - _JB_REG_R4) * 4)]
#endif
mov r0, #0x00000000
RET
.Lsetjmp_magic:
.word _JB_MAGIC_SETJMP
#ifdef __ARM_EABI__
GOT_INITSYM(.Lsetjmp_got, .Lsetjmp_gotinit)
.Lfpu_present:
.word PIC_SYM(_libc_arm_fpu_present, GOTOFF)
#endif /* __ARM_EABI__ */
END(setjmp)
.weak _C_LABEL(longjmp)
.set _C_LABEL(longjmp), _C_LABEL(__longjmp)
ENTRY(__longjmp)
ldr r2, [r0]
ldr ip, .Lsetjmp_magic
bic r3, r2, #(_JB_MAGIC_SETJMP ^ _JB_MAGIC_SETJMP_VFP)
teq r3, ip
bne .Lbotch
/* Restore the signal mask. */
stmfd sp!, {r0-r2, r14}
mov r2, #0x00000000
add r1, r0, #(_JB_SIGMASK * 4) /* Signal mask */
mov r0, #3 /* SIG_SETMASK */
bl PIC_SYM(_C_LABEL(sigprocmask), PLT)
ldmfd sp!, {r0-r2, r14}
#ifdef __ARM_EABI__
tst r2, #(_JB_MAGIC_SETJMP ^ _JB_MAGIC_SETJMP_VFP)
/* is this a VFP magic? */
beq 1f /* no, don't restore VFP */
add ip, r0, #(_JB_REG_D8 * 4)
vldmia ip, {d8-d15}
ldr ip, [r0, #(_JB_REG_FPSCR * 4)]
vmsr fpscr, ip
1:
#endif /* __ARM_EABI__ */
add r0, r0, #(_JB_REG_R4 * 4)
/* Restore integer registers */
#ifndef __thumb__
ldmia r0, {r4-r14}
#else
ldmia r0, {r4-r12}
ldr r13, [r0, #((_JB_REG_R13 - _JB_REG_R4) * 4)]
ldr r14, [r0, #((_JB_REG_R14 - _JB_REG_R4) * 4)]
#endif
/* Validate sp and r14 */
teq sp, #0
it ne
teqne r14, #0
it eq
beq .Lbotch
/* Set return value */
movs r0, r1
it eq
moveq r0, #0x00000001
RET
/* validation failed, die die die. */
.Lbotch:
bl PIC_SYM(_C_LABEL(longjmperror), PLT)
bl PIC_SYM(_C_LABEL(abort), PLT)
1: b 1b /* Cannot get here */
END(__longjmp)
|
