1/* Copyright (C) 2001-2017 Free Software Foundation, Inc.
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
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
17
18#ifndef _SYS_UCONTEXT_H
19#define _SYS_UCONTEXT_H 1
20
21#include <features.h>
22#include <signal.h>
23
24/* We need the signal context definitions even if they are not exposed
25 by <signal.h>. */
26#include <bits/sigcontext.h>
27#include <bits/sigstack.h>
28
29
30#ifdef __x86_64__
31
32/* Type for general register. */
33__extension__ typedef long long int greg_t;
34
35/* Number of general registers. */
36#define NGREG 23
37
38/* Container for all general registers. */
39typedef greg_t gregset_t[NGREG];
40
41#ifdef __USE_GNU
42/* Number of each register in the `gregset_t' array. */
43enum
44{
45 REG_R8 = 0,
46# define REG_R8 REG_R8
47 REG_R9,
48# define REG_R9 REG_R9
49 REG_R10,
50# define REG_R10 REG_R10
51 REG_R11,
52# define REG_R11 REG_R11
53 REG_R12,
54# define REG_R12 REG_R12
55 REG_R13,
56# define REG_R13 REG_R13
57 REG_R14,
58# define REG_R14 REG_R14
59 REG_R15,
60# define REG_R15 REG_R15
61 REG_RDI,
62# define REG_RDI REG_RDI
63 REG_RSI,
64# define REG_RSI REG_RSI
65 REG_RBP,
66# define REG_RBP REG_RBP
67 REG_RBX,
68# define REG_RBX REG_RBX
69 REG_RDX,
70# define REG_RDX REG_RDX
71 REG_RAX,
72# define REG_RAX REG_RAX
73 REG_RCX,
74# define REG_RCX REG_RCX
75 REG_RSP,
76# define REG_RSP REG_RSP
77 REG_RIP,
78# define REG_RIP REG_RIP
79 REG_EFL,
80# define REG_EFL REG_EFL
81 REG_CSGSFS, /* Actually short cs, gs, fs, __pad0. */
82# define REG_CSGSFS REG_CSGSFS
83 REG_ERR,
84# define REG_ERR REG_ERR
85 REG_TRAPNO,
86# define REG_TRAPNO REG_TRAPNO
87 REG_OLDMASK,
88# define REG_OLDMASK REG_OLDMASK
89 REG_CR2
90# define REG_CR2 REG_CR2
91};
92#endif
93
94struct _libc_fpxreg
95{
96 unsigned short int significand[4];
97 unsigned short int exponent;
98 unsigned short int padding[3];
99};
100
101struct _libc_xmmreg
102{
103 __uint32_t element[4];
104};
105
106struct _libc_fpstate
107{
108 /* 64-bit FXSAVE format. */
109 __uint16_t cwd;
110 __uint16_t swd;
111 __uint16_t ftw;
112 __uint16_t fop;
113 __uint64_t rip;
114 __uint64_t rdp;
115 __uint32_t mxcsr;
116 __uint32_t mxcr_mask;
117 struct _libc_fpxreg _st[8];
118 struct _libc_xmmreg _xmm[16];
119 __uint32_t padding[24];
120};
121
122/* Structure to describe FPU registers. */
123typedef struct _libc_fpstate *fpregset_t;
124
125/* Context to describe whole processor state. */
126typedef struct
127 {
128 gregset_t gregs;
129 /* Note that fpregs is a pointer. */
130 fpregset_t fpregs;
131 __extension__ unsigned long long __reserved1 [8];
132} mcontext_t;
133
134/* Userlevel context. */
135typedef struct ucontext
136 {
137 unsigned long int uc_flags;
138 struct ucontext *uc_link;
139 stack_t uc_stack;
140 mcontext_t uc_mcontext;
141 __sigset_t uc_sigmask;
142 struct _libc_fpstate __fpregs_mem;
143 } ucontext_t;
144
145#else /* !__x86_64__ */
146
147/* Type for general register. */
148typedef int greg_t;
149
150/* Number of general registers. */
151#define NGREG 19
152
153/* Container for all general registers. */
154typedef greg_t gregset_t[NGREG];
155
156#ifdef __USE_GNU
157/* Number of each register is the `gregset_t' array. */
158enum
159{
160 REG_GS = 0,
161# define REG_GS REG_GS
162 REG_FS,
163# define REG_FS REG_FS
164 REG_ES,
165# define REG_ES REG_ES
166 REG_DS,
167# define REG_DS REG_DS
168 REG_EDI,
169# define REG_EDI REG_EDI
170 REG_ESI,
171# define REG_ESI REG_ESI
172 REG_EBP,
173# define REG_EBP REG_EBP
174 REG_ESP,
175# define REG_ESP REG_ESP
176 REG_EBX,
177# define REG_EBX REG_EBX
178 REG_EDX,
179# define REG_EDX REG_EDX
180 REG_ECX,
181# define REG_ECX REG_ECX
182 REG_EAX,
183# define REG_EAX REG_EAX
184 REG_TRAPNO,
185# define REG_TRAPNO REG_TRAPNO
186 REG_ERR,
187# define REG_ERR REG_ERR
188 REG_EIP,
189# define REG_EIP REG_EIP
190 REG_CS,
191# define REG_CS REG_CS
192 REG_EFL,
193# define REG_EFL REG_EFL
194 REG_UESP,
195# define REG_UESP REG_UESP
196 REG_SS
197# define REG_SS REG_SS
198};
199#endif
200
201/* Definitions taken from the kernel headers. */
202struct _libc_fpreg
203{
204 unsigned short int significand[4];
205 unsigned short int exponent;
206};
207
208struct _libc_fpstate
209{
210 unsigned long int cw;
211 unsigned long int sw;
212 unsigned long int tag;
213 unsigned long int ipoff;
214 unsigned long int cssel;
215 unsigned long int dataoff;
216 unsigned long int datasel;
217 struct _libc_fpreg _st[8];
218 unsigned long int status;
219};
220
221/* Structure to describe FPU registers. */
222typedef struct _libc_fpstate *fpregset_t;
223
224/* Context to describe whole processor state. */
225typedef struct
226 {
227 gregset_t gregs;
228 /* Due to Linux's history we have to use a pointer here. The SysV/i386
229 ABI requires a struct with the values. */
230 fpregset_t fpregs;
231 unsigned long int oldmask;
232 unsigned long int cr2;
233 } mcontext_t;
234
235/* Userlevel context. */
236typedef struct ucontext
237 {
238 unsigned long int uc_flags;
239 struct ucontext *uc_link;
240 stack_t uc_stack;
241 mcontext_t uc_mcontext;
242 __sigset_t uc_sigmask;
243 struct _libc_fpstate __fpregs_mem;
244 } ucontext_t;
245
246#endif /* !__x86_64__ */
247
248#endif /* sys/ucontext.h */
249