1 /* Copyright (C) 1998-2023 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library. If not, see
16 <https://www.gnu.org/licenses/>. */
18 /* System V/ARM ABI compliant context switching support. */
20 #ifndef _SYS_UCONTEXT_H
21 #define _SYS_UCONTEXT_H 1
25 #include <bits/types/sigset_t.h>
26 #include <bits/types/stack_t.h>
30 # define __ctx(fld) fld
32 # define __ctx(fld) __ ## fld
38 /* Number of general registers. */
41 /* Container for all general registers. */
42 typedef greg_t gregset_t
[NGREG
];
44 /* Number of each register is the `gregset_t' array. */
48 # define REG_R0 REG_R0
50 # define REG_R1 REG_R1
52 # define REG_R2 REG_R2
54 # define REG_R3 REG_R3
56 # define REG_R4 REG_R4
58 # define REG_R5 REG_R5
60 # define REG_R6 REG_R6
62 # define REG_R7 REG_R7
64 # define REG_R8 REG_R8
66 # define REG_R9 REG_R9
68 # define REG_R10 REG_R10
70 # define REG_R11 REG_R11
72 # define REG_R12 REG_R12
74 # define REG_R13 REG_R13
76 # define REG_R14 REG_R14
78 # define REG_R15 REG_R15
86 unsigned int unused
:15;
88 unsigned int exponent
:14;
90 unsigned int mantissa1
:31;
91 unsigned int mantissa0
:32;
95 unsigned char ftype
[8];
96 unsigned int init_flag
;
98 /* Structure to describe FPU registers. */
99 typedef struct _libc_fpstate fpregset_t
;
102 /* Context to describe whole processor state. This only describes
103 the core registers; coprocessor registers get saved elsewhere
104 (e.g. in uc_regspace, or somewhere unspecified on the stack
105 during non-RT signal handlers). */
108 unsigned long int __ctx(trap_no
);
109 unsigned long int __ctx(error_code
);
110 unsigned long int __ctx(oldmask
);
111 unsigned long int __ctx(arm_r0
);
112 unsigned long int __ctx(arm_r1
);
113 unsigned long int __ctx(arm_r2
);
114 unsigned long int __ctx(arm_r3
);
115 unsigned long int __ctx(arm_r4
);
116 unsigned long int __ctx(arm_r5
);
117 unsigned long int __ctx(arm_r6
);
118 unsigned long int __ctx(arm_r7
);
119 unsigned long int __ctx(arm_r8
);
120 unsigned long int __ctx(arm_r9
);
121 unsigned long int __ctx(arm_r10
);
122 unsigned long int __ctx(arm_fp
);
123 unsigned long int __ctx(arm_ip
);
124 unsigned long int __ctx(arm_sp
);
125 unsigned long int __ctx(arm_lr
);
126 unsigned long int __ctx(arm_pc
);
127 unsigned long int __ctx(arm_cpsr
);
128 unsigned long int __ctx(fault_address
);
131 /* Userlevel context. */
132 typedef struct ucontext_t
134 unsigned long __ctx(uc_flags
);
135 struct ucontext_t
*uc_link
;
137 mcontext_t uc_mcontext
;
139 unsigned long __ctx(uc_regspace
)[128] __attribute__((__aligned__(8)));
144 #endif /* sys/ucontext.h */