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dff8da6b | 1 | /* Copyright (C) 1991-2024 Free Software Foundation, Inc. |
5c76ff27 UD |
2 | This file is part of the GNU C Library. |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
8 | ||
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
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17 | |
18 | /* Copied from setjmp/setjmp.h, powerpc/bits/setjmp.h and modified | |
19 | appropriately to keep backward compatible with setjmp without | |
20 | AltiVec/VMX support. | |
21 | ||
22 | This file is not exported and the interfaces are private to libc. */ | |
23 | ||
24 | #ifndef __NOVMX_SETJMP_H | |
25 | #define __NOVMX_SETJMP_H 1 | |
26 | ||
27 | #include <bits/wordsize.h> | |
28 | ||
29 | /* The following definitions are needed by ASM implementations of the old | |
30 | (novmx) __longjmp/__setjmp functions. */ | |
31 | ||
32 | # define JB_GPR1 0 /* Also known as the stack pointer */ | |
33 | # define JB_GPR2 1 | |
34 | # define JB_LR 2 /* The address we will return to */ | |
35 | # if __WORDSIZE == 64 | |
36 | # define JB_GPRS 3 /* GPRs 14 through 31 are saved, 18*2 words total. */ | |
37 | # define JB_CR 21 /* Condition code registers. */ | |
38 | # define JB_FPRS 22 /* FPRs 14 through 31 are saved, 18*2 words total. */ | |
39 | # define JB_SIZE (40 * 8) | |
40 | # else | |
41 | # define JB_GPRS 3 /* GPRs 14 through 31 are saved, 18 in total. */ | |
42 | # define JB_CR 21 /* Condition code registers. */ | |
43 | # define JB_FPRS 22 /* FPRs 14 through 31 are saved, 18*2 words total. */ | |
44 | # define JB_SIZE (58 * 4) | |
45 | # endif | |
46 | ||
47 | #ifndef _ASM | |
48 | /* The following definitions are needed by the novmx* implementations of | |
49 | setjmp/longjmp/sigsetjmp/etc that wrapper __setjmp/__longjmp. */ | |
50 | ||
51 | # if __WORDSIZE == 64 | |
52 | typedef long int __jmp_buf[40]; | |
53 | # else | |
54 | typedef long int __jmp_buf[58]; | |
55 | # endif | |
56 | ||
a992f506 | 57 | # include <bits/types/__sigset_t.h> |
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58 | |
59 | /* Calling environment, plus possibly a saved signal mask. */ | |
60 | typedef struct __novmx__jmp_buf_tag | |
61 | { | |
62 | /* NOTE: The machine-dependent definitions of `__sigsetjmp' | |
63 | assume that a `jmp_buf' begins with a `__jmp_buf' and that | |
64 | `__mask_was_saved' follows it. Do not move these members | |
65 | or add others before it. */ | |
66 | __jmp_buf __jmpbuf; /* Calling environment. */ | |
67 | int __mask_was_saved; /* Saved the signal mask? */ | |
68 | __sigset_t __saved_mask; /* Saved signal mask. */ | |
69 | } __novmx__jmp_buf[1]; | |
70 | ||
71 | ||
72 | /* Store the calling environment in ENV, also saving the signal mask. | |
73 | Return 0. */ | |
74 | extern int __novmxsetjmp (__novmx__jmp_buf __env); | |
75 | ||
76 | /* Store the calling environment in ENV, also saving the | |
77 | signal mask if SAVEMASK is nonzero. Return 0. | |
78 | This is the internal name for `sigsetjmp'. */ | |
79 | extern int __novmx__sigsetjmp (struct __novmx__jmp_buf_tag __env[1], | |
80 | int __savemask); | |
81 | ||
82 | /* Store the calling environment in ENV, not saving the signal mask. | |
83 | Return 0. */ | |
84 | extern int __novmx_setjmp (struct __novmx__jmp_buf_tag __env[1]); | |
85 | ||
86 | /* Jump to the environment saved in ENV, making the | |
87 | `setjmp' call there return VAL, or 1 if VAL is 0. */ | |
88 | extern void __novmxlongjmp (struct __novmx__jmp_buf_tag __env[1], int __val) | |
89 | __attribute__ ((__noreturn__)); | |
90 | ||
91 | /* Same. Usually `_longjmp' is used with `_setjmp', which does not save | |
92 | the signal mask. But it is how ENV was saved that determines whether | |
93 | `longjmp' restores the mask; `_longjmp' is just an alias. */ | |
94 | extern void __novmx_longjmp (struct __novmx__jmp_buf_tag __env[1], int __val) | |
95 | __attribute__ ((__noreturn__)); | |
96 | ||
97 | /* Use the same type for `jmp_buf' and `sigjmp_buf'. | |
98 | The `__mask_was_saved' flag determines whether | |
99 | or not `longjmp' will restore the signal mask. */ | |
100 | typedef struct __novmx__jmp_buf_tag __novmx__sigjmp_buf[1]; | |
101 | ||
102 | /* Jump to the environment saved in ENV, making the | |
103 | sigsetjmp call there return VAL, or 1 if VAL is 0. | |
104 | Restore the signal mask if that sigsetjmp call saved it. | |
105 | This is just an alias `longjmp'. */ | |
106 | extern void __novmxsiglongjmp (__novmx__sigjmp_buf __env, int __val) | |
107 | __attribute__ ((__noreturn__)); | |
108 | ||
109 | /* Internal machine-dependent function to restore context sans signal mask. */ | |
4041cfe8 | 110 | extern void __novmx__longjmp (__jmp_buf __env, int __val) |
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111 | __attribute__ ((__noreturn__)); |
112 | ||
113 | /* Internal function to possibly save the current mask of blocked signals | |
114 | in ENV, and always set the flag saying whether or not it was saved. | |
115 | This is used by the machine-dependent definition of `__sigsetjmp'. | |
116 | Always returns zero, for convenience. */ | |
117 | extern int __novmx__sigjmp_save (__novmx__jmp_buf __env, int __savemask); | |
118 | ||
119 | extern void _longjmp_unwind (__novmx__jmp_buf env, int val); | |
120 | ||
121 | extern void __novmx__libc_siglongjmp (__novmx__sigjmp_buf env, int val) | |
122 | __attribute__ ((noreturn)); | |
123 | ||
124 | extern void __novmx__libc_longjmp (__novmx__sigjmp_buf env, int val) | |
125 | __attribute__ ((noreturn)); | |
126 | ||
127 | libc_hidden_proto (__novmx__libc_longjmp) | |
128 | libc_hidden_proto (__novmx_setjmp) | |
129 | libc_hidden_proto (__novmx__sigsetjmp) | |
130 | #endif /* !_ASM */ | |
131 | ||
132 | #endif |