1 /* Copyright (C) 2001, 2002 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, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 02111-1307 USA. */
18
19 #ifndef _SYS_UCONTEXT_H
20 #define _SYS_UCONTEXT_H 1
21
22 #include <features.h>
23 #include <signal.h>
24 #include <bits/wordsize.h>
25
26 /* We need the signal context definitions even if they are not used
27 included in <signal.h>. */
28 #include <bits/sigcontext.h>
29
30 #if __WORDSIZE == 64
31
32 /* Type for general register. */
33 typedef long int greg_t;
34
35 /* Number of general registers. */
36 #define NGREG 23
37
38 /* Container for all general registers. */
39 typedef greg_t gregset_t[NGREG];
40
41 #ifdef __USE_GNU
42 /* Number of each register in the `gregset_t' array. */
43 enum
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
94 struct _libc_fpxreg
95 {
96 unsigned short int significand[4];
97 unsigned short int exponent;
98 unsigned short int padding[3];
99 };
100
101 struct _libc_xmmreg
102 {
103 __uint32_t element[4];
104 };
105
106 struct _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. */
123 typedef struct _libc_fpstate *fpregset_t;
124
125 /* Context to describe whole processor state. */
126 typedef struct
127 {
128 gregset_t gregs;
129 /* Note that fpregs is a pointer. */
130 fpregset_t fpregs;
131 unsigned long __reserved1 [8];
132 } mcontext_t;
133
134 /* Userlevel context. */
135 typedef 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 /* __WORDSIZE == 32 */
146
147 /* Type for general register. */
148 typedef int greg_t;
149
150 /* Number of general registers. */
151 #define NGREG 19
152
153 /* Container for all general registers. */
154 typedef greg_t gregset_t[NGREG];
155
156 #ifdef __USE_GNU
157 /* Number of each register is the `gregset_t' array. */
158 enum
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. */
202 struct _libc_fpreg
203 {
204 unsigned short int significand[4];
205 unsigned short int exponent;
206 };
207
208 struct _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. */
222 typedef struct _libc_fpstate *fpregset_t;
223
224 /* Context to describe whole processor state. */
225 typedef 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. */
236 typedef 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 /* __WORDSIZE == 32 */
247
248 #endif /* sys/ucontext.h */
249