ucontext.h source code [include/x86_64-linux-gnu/sys/ucontext.h]

1	/* Copyright (C) 2001-2016 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 used
25	included in <signal.h>. */
26	#include <bits/sigcontext.h>
27
28	#ifdef __x86_64__
29
30	/* Type for general register. */
31	__extension__ typedef long long int greg_t;
32
33	/* Number of general registers. */
34	#define NGREG 23
35
36	/* Container for all general registers. */
37	typedef greg_t gregset_t[NGREG];
38
39	#ifdef __USE_GNU
40	/* Number of each register in the `gregset_t' array. */
41	enum
42	{
43	REG_R8 = 0,
44	# define REG_R8 REG_R8
45	REG_R9,
46	# define REG_R9 REG_R9
47	REG_R10,
48	# define REG_R10 REG_R10
49	REG_R11,
50	# define REG_R11 REG_R11
51	REG_R12,
52	# define REG_R12 REG_R12
53	REG_R13,
54	# define REG_R13 REG_R13
55	REG_R14,
56	# define REG_R14 REG_R14
57	REG_R15,
58	# define REG_R15 REG_R15
59	REG_RDI,
60	# define REG_RDI REG_RDI
61	REG_RSI,
62	# define REG_RSI REG_RSI
63	REG_RBP,
64	# define REG_RBP REG_RBP
65	REG_RBX,
66	# define REG_RBX REG_RBX
67	REG_RDX,
68	# define REG_RDX REG_RDX
69	REG_RAX,
70	# define REG_RAX REG_RAX
71	REG_RCX,
72	# define REG_RCX REG_RCX
73	REG_RSP,
74	# define REG_RSP REG_RSP
75	REG_RIP,
76	# define REG_RIP REG_RIP
77	REG_EFL,
78	# define REG_EFL REG_EFL
79	REG_CSGSFS, /* Actually short cs, gs, fs, __pad0. */
80	# define REG_CSGSFS REG_CSGSFS
81	REG_ERR,
82	# define REG_ERR REG_ERR
83	REG_TRAPNO,
84	# define REG_TRAPNO REG_TRAPNO
85	REG_OLDMASK,
86	# define REG_OLDMASK REG_OLDMASK
87	REG_CR2
88	# define REG_CR2 REG_CR2
89	};
90	#endif
91
92	struct _libc_fpxreg
93	{
94	unsigned short int significand[4];
95	unsigned short int exponent;
96	unsigned short int padding[3];
97	};
98
99	struct _libc_xmmreg
100	{
101	__uint32_t element[4];
102	};
103
104	struct _libc_fpstate
105	{
106	/* 64-bit FXSAVE format. */
107	__uint16_t cwd;
108	__uint16_t swd;
109	__uint16_t ftw;
110	__uint16_t fop;
111	__uint64_t rip;
112	__uint64_t rdp;
113	__uint32_t mxcsr;
114	__uint32_t mxcr_mask;
115	struct _libc_fpxreg _st[8];
116	struct _libc_xmmreg _xmm[16];
117	__uint32_t padding[24];
118	};
119
120	/* Structure to describe FPU registers. */
121	typedef struct _libc_fpstate *fpregset_t;
122
123	/* Context to describe whole processor state. */
124	typedef struct
125	{
126	gregset_t gregs;
127	/* Note that fpregs is a pointer. */
128	fpregset_t fpregs;
129	__extension__ unsigned long long __reserved1 [8];
130	} mcontext_t;
131
132	/* Userlevel context. */
133	typedef struct ucontext
134	{
135	unsigned long int uc_flags;
136	struct ucontext *uc_link;
137	stack_t uc_stack;
138	mcontext_t uc_mcontext;
139	__sigset_t uc_sigmask;
140	struct _libc_fpstate __fpregs_mem;
141	} ucontext_t;
142
143	#else /* !__x86_64__ */
144
145	/* Type for general register. */
146	typedef int greg_t;
147
148	/* Number of general registers. */
149	#define NGREG 19
150
151	/* Container for all general registers. */
152	typedef greg_t gregset_t[NGREG];
153
154	#ifdef __USE_GNU
155	/* Number of each register is the `gregset_t' array. */
156	enum
157	{
158	REG_GS = 0,
159	# define REG_GS REG_GS
160	REG_FS,
161	# define REG_FS REG_FS
162	REG_ES,
163	# define REG_ES REG_ES
164	REG_DS,
165	# define REG_DS REG_DS
166	REG_EDI,
167	# define REG_EDI REG_EDI
168	REG_ESI,
169	# define REG_ESI REG_ESI
170	REG_EBP,
171	# define REG_EBP REG_EBP
172	REG_ESP,
173	# define REG_ESP REG_ESP
174	REG_EBX,
175	# define REG_EBX REG_EBX
176	REG_EDX,
177	# define REG_EDX REG_EDX
178	REG_ECX,
179	# define REG_ECX REG_ECX
180	REG_EAX,
181	# define REG_EAX REG_EAX
182	REG_TRAPNO,
183	# define REG_TRAPNO REG_TRAPNO
184	REG_ERR,
185	# define REG_ERR REG_ERR
186	REG_EIP,
187	# define REG_EIP REG_EIP
188	REG_CS,
189	# define REG_CS REG_CS
190	REG_EFL,
191	# define REG_EFL REG_EFL
192	REG_UESP,
193	# define REG_UESP REG_UESP
194	REG_SS
195	# define REG_SS REG_SS
196	};
197	#endif
198
199	/* Definitions taken from the kernel headers. */
200	struct _libc_fpreg
201	{
202	unsigned short int significand[4];
203	unsigned short int exponent;
204	};
205
206	struct _libc_fpstate
207	{
208	unsigned long int cw;
209	unsigned long int sw;
210	unsigned long int tag;
211	unsigned long int ipoff;
212	unsigned long int cssel;
213	unsigned long int dataoff;
214	unsigned long int datasel;
215	struct _libc_fpreg _st[8];
216	unsigned long int status;
217	};
218
219	/* Structure to describe FPU registers. */
220	typedef struct _libc_fpstate *fpregset_t;
221
222	/* Context to describe whole processor state. */
223	typedef struct
224	{
225	gregset_t gregs;
226	/* Due to Linux's history we have to use a pointer here. The SysV/i386
227	ABI requires a struct with the values. */
228	fpregset_t fpregs;
229	unsigned long int oldmask;
230	unsigned long int cr2;
231	} mcontext_t;
232
233	/* Userlevel context. */
234	typedef struct ucontext
235	{
236	unsigned long int uc_flags;
237	struct ucontext *uc_link;
238	stack_t uc_stack;
239	mcontext_t uc_mcontext;
240	__sigset_t uc_sigmask;
241	struct _libc_fpstate __fpregs_mem;
242	} ucontext_t;
243
244	#endif /* !__x86_64__ */
245
246	#endif /* sys/ucontext.h */
247

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