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bfff8b1b | 1 | /* Copyright (C) 1998-2017 Free Software Foundation, Inc. |
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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 | |
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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. | |
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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 | |
3214b89b | 12 | Lesser General Public License for more details. |
77e906bb | 13 | |
3214b89b | 14 | You should have received a copy of the GNU Lesser General Public |
ab84e3ff PE |
15 | License along with the GNU C Library. If not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
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17 | |
18 | /* System V/ARM ABI compliant context switching support. */ | |
19 | ||
20 | #ifndef _SYS_UCONTEXT_H | |
21 | #define _SYS_UCONTEXT_H 1 | |
22 | ||
23 | #include <features.h> | |
24 | #include <signal.h> | |
77e906bb | 25 | |
c66b29f9 ZW |
26 | /* We need the signal context definitions even if they are not exposed |
27 | by <signal.h>. */ | |
7a11d626 | 28 | #include <bits/sigcontext.h> |
c66b29f9 ZW |
29 | #include <bits/sigstack.h> |
30 | ||
7a11d626 | 31 | |
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32 | typedef int greg_t; |
33 | ||
34 | /* Number of general registers. */ | |
7a11d626 | 35 | #define NGREG 18 |
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36 | |
37 | /* Container for all general registers. */ | |
c1e30fd8 | 38 | typedef greg_t gregset_t[NGREG]; |
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39 | |
40 | /* Number of each register is the `gregset_t' array. */ | |
41 | enum | |
42 | { | |
c1e30fd8 PG |
43 | REG_R0 = 0, |
44 | #define REG_R0 REG_R0 | |
45 | REG_R1 = 1, | |
46 | #define REG_R1 REG_R1 | |
47 | REG_R2 = 2, | |
48 | #define REG_R2 REG_R2 | |
49 | REG_R3 = 3, | |
50 | #define REG_R3 REG_R3 | |
51 | REG_R4 = 4, | |
52 | #define REG_R4 REG_R4 | |
53 | REG_R5 = 5, | |
54 | #define REG_R5 REG_R5 | |
55 | REG_R6 = 6, | |
56 | #define REG_R6 REG_R6 | |
57 | REG_R7 = 7, | |
58 | #define REG_R7 REG_R7 | |
59 | REG_R8 = 8, | |
60 | #define REG_R8 REG_R8 | |
61 | REG_R9 = 9, | |
62 | #define REG_R9 REG_R9 | |
63 | REG_R10 = 10, | |
64 | #define REG_R10 REG_R10 | |
65 | REG_R11 = 11, | |
66 | #define REG_R11 REG_R11 | |
67 | REG_R12 = 12, | |
68 | #define REG_R12 REG_R12 | |
69 | REG_R13 = 13, | |
70 | #define REG_R13 REG_R13 | |
71 | REG_R14 = 14, | |
72 | #define REG_R14 REG_R14 | |
73 | REG_R15 = 15 | |
74 | #define REG_R15 REG_R15 | |
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75 | }; |
76 | ||
c1e30fd8 PG |
77 | struct _libc_fpstate |
78 | { | |
79 | struct | |
80 | { | |
81 | unsigned int sign1:1; | |
82 | unsigned int unused:15; | |
83 | unsigned int sign2:1; | |
84 | unsigned int exponent:14; | |
85 | unsigned int j:1; | |
86 | unsigned int mantissa1:31; | |
87 | unsigned int mantissa0:32; | |
88 | } fpregs[8]; | |
89 | unsigned int fpsr:32; | |
90 | unsigned int fpcr:32; | |
91 | unsigned char ftype[8]; | |
92 | unsigned int init_flag; | |
93 | }; | |
77e906bb | 94 | /* Structure to describe FPU registers. */ |
c1e30fd8 | 95 | typedef struct _libc_fpstate fpregset_t; |
77e906bb | 96 | |
7a11d626 DJ |
97 | /* Context to describe whole processor state. This only describes |
98 | the core registers; coprocessor registers get saved elsewhere | |
99 | (e.g. in uc_regspace, or somewhere unspecified on the stack | |
100 | during non-RT signal handlers). */ | |
101 | typedef struct sigcontext mcontext_t; | |
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102 | |
103 | /* Userlevel context. */ | |
104 | typedef struct ucontext | |
105 | { | |
7a11d626 | 106 | unsigned long uc_flags; |
77e906bb | 107 | struct ucontext *uc_link; |
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108 | stack_t uc_stack; |
109 | mcontext_t uc_mcontext; | |
7a11d626 DJ |
110 | __sigset_t uc_sigmask; |
111 | unsigned long uc_regspace[128] __attribute__((__aligned__(8))); | |
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112 | } ucontext_t; |
113 | ||
114 | #endif /* sys/ucontext.h */ |