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2b778ceb | 1 | /* Copyright (C) 1992-2021 Free Software Foundation, Inc. |
d0c2d3b3 UD |
2 | This file is part of the GNU C Library. |
3 | Contributed by Brendan Kehoe (brendan@zen.org). | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
3214b89b AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
d0c2d3b3 UD |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
3214b89b | 13 | Lesser General Public License for more details. |
d0c2d3b3 | 14 | |
3214b89b | 15 | You should have received a copy of the GNU Lesser General Public |
ab84e3ff | 16 | License along with the GNU C Library. If not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
d0c2d3b3 UD |
18 | |
19 | #include <setjmp.h> | |
b8ddf7a1 | 20 | #include <sgidefs.h> |
d0c2d3b3 UD |
21 | #include <stdlib.h> |
22 | ||
d0c2d3b3 UD |
23 | #ifndef __GNUC__ |
24 | #error This file uses GNU C extensions; you must compile with GCC. | |
25 | #endif | |
26 | ||
27 | void | |
bd2260a2 | 28 | __longjmp (__jmp_buf env_arg, int val_arg) |
d0c2d3b3 UD |
29 | { |
30 | /* gcc 1.39.19 miscompiled the longjmp routine (as it did setjmp before | |
31 | the hack around it); force it to use $a1 for the longjmp value. | |
32 | Without this it saves $a1 in a register which gets clobbered | |
33 | along the way. */ | |
c67273d5 | 34 | register struct __jmp_buf_internal_tag *env asm ("a0"); |
d0c2d3b3 | 35 | register int val asm ("a1"); |
6a9f82ac JM |
36 | #ifdef CHECK_SP |
37 | register long long sp asm ("$29"); | |
c67273d5 | 38 | CHECK_SP (env[0].__sp, sp, long long); |
6a9f82ac | 39 | #endif |
d0c2d3b3 | 40 | |
6b4d184d | 41 | #ifdef __mips_hard_float |
d0c2d3b3 | 42 | /* Pull back the floating point callee-saved registers. */ |
b8ddf7a1 | 43 | #if _MIPS_SIM == _ABI64 |
d0c2d3b3 UD |
44 | asm volatile ("l.d $f24, %0" : : "m" (env[0].__fpregs[0])); |
45 | asm volatile ("l.d $f25, %0" : : "m" (env[0].__fpregs[1])); | |
46 | asm volatile ("l.d $f26, %0" : : "m" (env[0].__fpregs[2])); | |
47 | asm volatile ("l.d $f27, %0" : : "m" (env[0].__fpregs[3])); | |
48 | asm volatile ("l.d $f28, %0" : : "m" (env[0].__fpregs[4])); | |
49 | asm volatile ("l.d $f29, %0" : : "m" (env[0].__fpregs[5])); | |
50 | asm volatile ("l.d $f30, %0" : : "m" (env[0].__fpregs[6])); | |
51 | asm volatile ("l.d $f31, %0" : : "m" (env[0].__fpregs[7])); | |
a5b668cc AO |
52 | #else |
53 | asm volatile ("l.d $f20, %0" : : "m" (env[0].__fpregs[0])); | |
54 | asm volatile ("l.d $f22, %0" : : "m" (env[0].__fpregs[1])); | |
55 | asm volatile ("l.d $f24, %0" : : "m" (env[0].__fpregs[2])); | |
56 | asm volatile ("l.d $f26, %0" : : "m" (env[0].__fpregs[3])); | |
57 | asm volatile ("l.d $f28, %0" : : "m" (env[0].__fpregs[4])); | |
58 | asm volatile ("l.d $f30, %0" : : "m" (env[0].__fpregs[5])); | |
59 | #endif | |
6b4d184d | 60 | #endif |
d0c2d3b3 | 61 | |
d0c2d3b3 UD |
62 | /* Get the GP. */ |
63 | asm volatile ("ld $gp, %0" : : "m" (env[0].__gp)); | |
64 | ||
65 | /* Get the callee-saved registers. */ | |
66 | asm volatile ("ld $16, %0" : : "m" (env[0].__regs[0])); | |
67 | asm volatile ("ld $17, %0" : : "m" (env[0].__regs[1])); | |
68 | asm volatile ("ld $18, %0" : : "m" (env[0].__regs[2])); | |
69 | asm volatile ("ld $19, %0" : : "m" (env[0].__regs[3])); | |
70 | asm volatile ("ld $20, %0" : : "m" (env[0].__regs[4])); | |
71 | asm volatile ("ld $21, %0" : : "m" (env[0].__regs[5])); | |
72 | asm volatile ("ld $22, %0" : : "m" (env[0].__regs[6])); | |
73 | asm volatile ("ld $23, %0" : : "m" (env[0].__regs[7])); | |
74 | ||
75 | /* Get the PC. */ | |
76 | asm volatile ("ld $31, %0" : : "m" (env[0].__pc)); | |
77 | ||
a9a575e6 AJ |
78 | |
79 | /* Restore the stack pointer and the FP. They have to be restored | |
80 | last and in a single asm as gcc, depending on options used, may | |
81 | use either of them to access env. */ | |
82 | asm volatile ("ld $29, %0\n\t" | |
83 | "ld $30, %1\n\t" : : "m" (env[0].__sp), "m" (env[0].__fp)); | |
84 | ||
85 | /* Give setjmp 1 if given a 0, or what they gave us if non-zero. */ | |
d0c2d3b3 UD |
86 | if (val == 0) |
87 | asm volatile ("dli $2, 1"); | |
88 | else | |
89 | asm volatile ("move $2, %0" : : "r" (val)); | |
90 | ||
91 | asm volatile ("j $31"); | |
92 | ||
6959849d AJ |
93 | /* Avoid `volatile function does return' warnings. */ |
94 | for (;;); | |
d0c2d3b3 | 95 | } |