1/* Copyright (C) 1997-2026 Free Software Foundation, Inc. This file is part of the GNU C Library.
2
3 The GNU C Library is free software; you can redistribute it and/or
4 modify it under the terms of the GNU Lesser General Public
5 License as published by the Free Software Foundation; either
6 version 2.1 of the License, or (at your option) any later version.
7
8 The GNU C Library is distributed in the hope that it will be useful,
9 but WITHOUT ANY WARRANTY; without even the implied warranty of
10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 Lesser General Public License for more details.
12
13 You should have received a copy of the GNU Lesser General Public
14 License along with the GNU C Library. If not, see
15 <https://www.gnu.org/licenses/>. */
16
17/* Don't rely on this, the interface is currently messed up and may need to
18 be broken to be fixed. */
19#ifndef _SYS_UCONTEXT_H
20#define _SYS_UCONTEXT_H 1
21
22#include <features.h>
23
24#include <bits/types/sigset_t.h>
25#include <bits/types/stack_t.h>
26
27#include <sgidefs.h>
28
29
30/* Type for general register. Even in o32 we assume 64-bit registers,
31 like the kernel. */
32__extension__ typedef unsigned long long int greg_t;
33
34/* Number of general registers. */
35#define __NGREG 32
36#define __NFPREG 32
37#ifdef __USE_MISC
38# define NGREG __NGREG
39# define NFPREG __NFPREG
40#endif
41
42/* Container for all general registers. */
43typedef greg_t gregset_t[__NGREG];
44
45#ifdef __USE_MISC
46# define __ctx(fld) fld
47#else
48# define __ctx(fld) __ ## fld
49#endif
50
51/* Container for all FPU registers. */
52typedef struct {
53 union {
54 double __ctx(fp_dregs)[__NFPREG];
55 struct {
56 float _fp_fregs;
57 unsigned int _fp_pad;
58 } __ctx(fp_fregs)[__NFPREG];
59 } __ctx(fp_r);
60} fpregset_t;
61
62
63/* Context to describe whole processor state. */
64#if _MIPS_SIM == _ABIO32
65/* Earlier versions of glibc for mips had an entirely different
66 definition of mcontext_t, that didn't even resemble the
67 corresponding kernel data structure. Fortunately, makecontext,
68 [gs]etcontext et all were not implemented back then, so this can
69 still be rectified. */
70typedef struct
71 {
72 unsigned int __ctx(regmask);
73 unsigned int __ctx(status);
74 greg_t __ctx(pc);
75 gregset_t __ctx(gregs);
76 fpregset_t __ctx(fpregs);
77 unsigned int __ctx(fp_owned);
78 unsigned int __ctx(fpc_csr);
79 unsigned int __ctx(fpc_eir);
80 unsigned int __ctx(used_math);
81 unsigned int __ctx(dsp);
82 greg_t __ctx(mdhi);
83 greg_t __ctx(mdlo);
84 unsigned long __ctx(hi1);
85 unsigned long __ctx(lo1);
86 unsigned long __ctx(hi2);
87 unsigned long __ctx(lo2);
88 unsigned long __ctx(hi3);
89 unsigned long __ctx(lo3);
90 } mcontext_t;
91#else
92typedef struct
93 {
94 gregset_t __ctx(gregs);
95 fpregset_t __ctx(fpregs);
96 greg_t __ctx(mdhi);
97 greg_t __ctx(hi1);
98 greg_t __ctx(hi2);
99 greg_t __ctx(hi3);
100 greg_t __ctx(mdlo);
101 greg_t __ctx(lo1);
102 greg_t __ctx(lo2);
103 greg_t __ctx(lo3);
104 greg_t __ctx(pc);
105 unsigned int __ctx(fpc_csr);
106 unsigned int __ctx(used_math);
107 unsigned int __ctx(dsp);
108 unsigned int __glibc_reserved1;
109 } mcontext_t;
110#endif
111
112/* Userlevel context. */
113typedef struct ucontext_t
114 {
115 unsigned long int __ctx(uc_flags);
116 struct ucontext_t *uc_link;
117 stack_t uc_stack;
118 mcontext_t uc_mcontext;
119 sigset_t uc_sigmask;
120 } ucontext_t;
121
122#undef __ctx
123
124#endif /* sys/ucontext.h */