about summary refs log tree commit diff
path: root/sysdeps/unix/sysv/linux/arm/sys/ucontext.h
blob: d6934affebd5e262bea6dd8bd25e7213fa5448ca (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
/* Copyright (C) 1998-2020 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library.  If not, see
   <https://www.gnu.org/licenses/>.  */

/* System V/ARM ABI compliant context switching support.  */

#ifndef _SYS_UCONTEXT_H
#define _SYS_UCONTEXT_H	1

#include <features.h>

#include <bits/types/sigset_t.h>
#include <bits/types/stack_t.h>


#ifdef __USE_MISC
# define __ctx(fld) fld
#else
# define __ctx(fld) __ ## fld
#endif

#ifdef __USE_MISC
typedef int greg_t;

/* Number of general registers.  */
# define NGREG	18

/* Container for all general registers.  */
typedef greg_t gregset_t[NGREG];

/* Number of each register is the `gregset_t' array.  */
enum
{
  REG_R0 = 0,
# define REG_R0	REG_R0
  REG_R1 = 1,
# define REG_R1	REG_R1
  REG_R2 = 2,
# define REG_R2	REG_R2
  REG_R3 = 3,
# define REG_R3	REG_R3
  REG_R4 = 4,
# define REG_R4	REG_R4
  REG_R5 = 5,
# define REG_R5	REG_R5
  REG_R6 = 6,
# define REG_R6	REG_R6
  REG_R7 = 7,
# define REG_R7	REG_R7
  REG_R8 = 8,
# define REG_R8	REG_R8
  REG_R9 = 9,
# define REG_R9	REG_R9
  REG_R10 = 10,
# define REG_R10	REG_R10
  REG_R11 = 11,
# define REG_R11	REG_R11
  REG_R12 = 12,
# define REG_R12	REG_R12
  REG_R13 = 13,
# define REG_R13	REG_R13
  REG_R14 = 14,
# define REG_R14	REG_R14
  REG_R15 = 15
# define REG_R15	REG_R15
};

struct _libc_fpstate
{
  struct
  {
    unsigned int sign1:1;
    unsigned int unused:15;
    unsigned int sign2:1;
    unsigned int exponent:14;
    unsigned int j:1;
    unsigned int mantissa1:31;
    unsigned int mantissa0:32;
  } fpregs[8];
  unsigned int fpsr:32;
  unsigned int fpcr:32;
  unsigned char ftype[8];
  unsigned int init_flag;
};
/* Structure to describe FPU registers.  */
typedef struct _libc_fpstate fpregset_t;
#endif

/* Context to describe whole processor state.  This only describes
   the core registers; coprocessor registers get saved elsewhere
   (e.g. in uc_regspace, or somewhere unspecified on the stack
   during non-RT signal handlers).  */
typedef struct
  {
    unsigned long int __ctx(trap_no);
    unsigned long int __ctx(error_code);
    unsigned long int __ctx(oldmask);
    unsigned long int __ctx(arm_r0);
    unsigned long int __ctx(arm_r1);
    unsigned long int __ctx(arm_r2);
    unsigned long int __ctx(arm_r3);
    unsigned long int __ctx(arm_r4);
    unsigned long int __ctx(arm_r5);
    unsigned long int __ctx(arm_r6);
    unsigned long int __ctx(arm_r7);
    unsigned long int __ctx(arm_r8);
    unsigned long int __ctx(arm_r9);
    unsigned long int __ctx(arm_r10);
    unsigned long int __ctx(arm_fp);
    unsigned long int __ctx(arm_ip);
    unsigned long int __ctx(arm_sp);
    unsigned long int __ctx(arm_lr);
    unsigned long int __ctx(arm_pc);
    unsigned long int __ctx(arm_cpsr);
    unsigned long int __ctx(fault_address);
  } mcontext_t;

/* Userlevel context.  */
typedef struct ucontext_t
  {
    unsigned long __ctx(uc_flags);
    struct ucontext_t *uc_link;
    stack_t uc_stack;
    mcontext_t uc_mcontext;
    sigset_t uc_sigmask;
    unsigned long __ctx(uc_regspace)[128] __attribute__((__aligned__(8)));
  } ucontext_t;

#undef __ctx

#endif /* sys/ucontext.h */