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
|
/* Copyright (C) 1992-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Brendan Kehoe (brendan@zen.org).
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */
#include <setjmp.h>
#include <stdlib.h>
#ifndef __GNUC__
#error This file uses GNU C extensions; you must compile with GCC.
#endif
static void __attribute__ ((nomips16))
____longjmp (__jmp_buf env_arg, int val_arg)
{
/* gcc 1.39.19 miscompiled the longjmp routine (as it did setjmp before
the hack around it); force it to use $a1 for the longjmp value.
Without this it saves $a1 in a register which gets clobbered
along the way. */
register struct __jmp_buf_internal_tag *env asm ("a0");
register int val asm ("a1");
#ifdef CHECK_SP
register long sp asm ("$29");
CHECK_SP (env[0].__sp, sp, long);
#endif
#ifdef __mips_hard_float
/* Pull back the floating point callee-saved registers. */
asm volatile ("l.d $f20, %0" : : "m" (env[0].__fpregs[0]));
asm volatile ("l.d $f22, %0" : : "m" (env[0].__fpregs[1]));
asm volatile ("l.d $f24, %0" : : "m" (env[0].__fpregs[2]));
asm volatile ("l.d $f26, %0" : : "m" (env[0].__fpregs[3]));
asm volatile ("l.d $f28, %0" : : "m" (env[0].__fpregs[4]));
asm volatile ("l.d $f30, %0" : : "m" (env[0].__fpregs[5]));
#endif
/* Get the GP. */
asm volatile ("lw $gp, %0" : : "m" (env[0].__gp));
/* Get the callee-saved registers. */
asm volatile ("lw $16, %0" : : "m" (env[0].__regs[0]));
asm volatile ("lw $17, %0" : : "m" (env[0].__regs[1]));
asm volatile ("lw $18, %0" : : "m" (env[0].__regs[2]));
asm volatile ("lw $19, %0" : : "m" (env[0].__regs[3]));
asm volatile ("lw $20, %0" : : "m" (env[0].__regs[4]));
asm volatile ("lw $21, %0" : : "m" (env[0].__regs[5]));
asm volatile ("lw $22, %0" : : "m" (env[0].__regs[6]));
asm volatile ("lw $23, %0" : : "m" (env[0].__regs[7]));
/* Get the PC. */
asm volatile ("lw $25, %0" : : "m" (env[0].__pc));
/* Restore the stack pointer and the FP. They have to be restored
last and in a single asm as gcc, depending on options used, may
use either of them to access env. */
asm volatile ("lw $29, %0\n\t"
"lw $30, %1\n\t" : : "m" (env[0].__sp), "m" (env[0].__fp));
/* Give setjmp 1 if given a 0, or what they gave us if non-zero. */
if (val == 0)
asm volatile ("li $2, 1");
else
asm volatile ("move $2, %0" : : "r" (val));
asm volatile ("jr $25");
/* Avoid `volatile function does return' warnings. */
for (;;);
}
/* Not using strong_alias because the nomips16 attribute cannot be
copied from ____longjmp to __longjmp, because of the
architecture-independent declaration of __longjmp without the
attribute and compiler errors for such attributes not being the
same on all declarations. */
extern __typeof (____longjmp) __longjmp __attribute__ ((alias ("____longjmp")));
|
