ucontext.h revision 7b95807fa086174cbab146cbd7c60a6d2e386917 
1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *  * Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 *  * Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in
12 *    the documentation and/or other materials provided with the
13 *    distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#ifndef _SYS_UCONTEXT_H_
30#define _SYS_UCONTEXT_H_
31
32#include <signal.h>
33#include <sys/user.h>
34
35__BEGIN_DECLS
36
37#if defined(__arm__)
38
39enum {
40  REG_R0 = 0,
41  REG_R1,
42  REG_R2,
43  REG_R3,
44  REG_R4,
45  REG_R5,
46  REG_R6,
47  REG_R7,
48  REG_R8,
49  REG_R9,
50  REG_R10,
51  REG_R11,
52  REG_R12,
53  REG_R13,
54  REG_R14,
55  REG_R15,
56};
57
58#define NGREG 18 /* Like glibc. */
59
60typedef int greg_t;
61typedef greg_t gregset_t[NGREG];
62
63/* TODO: fpregset_t. */
64
65#include <asm/sigcontext.h>
66typedef struct sigcontext mcontext_t;
67
68typedef struct ucontext {
69  unsigned long uc_flags;
70  struct ucontext* uc_link;
71  stack_t uc_stack;
72  mcontext_t uc_mcontext;
73  sigset_t uc_sigmask;
74  /* TODO: uc_regspace */
75} ucontext_t;
76
77#elif defined(__aarch64__)
78
79/* TODO: gregset_t and fpregset_t. */
80
81#include <asm/sigcontext.h>
82typedef struct sigcontext mcontext_t;
83
84typedef struct ucontext {
85  unsigned long uc_flags;
86  struct ucontext *uc_link;
87  stack_t uc_stack;
88  sigset_t uc_sigmask;
89  mcontext_t uc_mcontext;
90} ucontext_t;
91
92#elif defined(__i386__)
93
94enum {
95  REG_GS = 0,
96  REG_FS,
97  REG_ES,
98  REG_DS,
99  REG_EDI,
100  REG_ESI,
101  REG_EBP,
102  REG_ESP,
103  REG_EBX,
104  REG_EDX,
105  REG_ECX,
106  REG_EAX,
107  REG_TRAPNO,
108  REG_ERR,
109  REG_EIP,
110  REG_CS,
111  REG_EFL,
112  REG_UESP,
113  REG_SS,
114  NGREG
115};
116
117typedef int greg_t;
118typedef greg_t gregset_t[NGREG];
119
120struct _libc_fpreg {
121  unsigned short significand[4];
122  unsigned short exponent;
123};
124
125struct _libc_fpstate {
126  unsigned long cw;
127  unsigned long sw;
128  unsigned long tag;
129  unsigned long ipoff;
130  unsigned long cssel;
131  unsigned long dataoff;
132  unsigned long datasel;
133  struct _libc_fpreg _st[8];
134  unsigned long status;
135};
136
137typedef struct _libc_fpstate* fpregset_t;
138
139typedef struct {
140  gregset_t gregs;
141  fpregset_t fpregs;
142  unsigned long oldmask;
143  unsigned long cr2;
144} mcontext_t;
145
146typedef struct ucontext {
147  unsigned long uc_flags;
148  struct ucontext* uc_link;
149  stack_t uc_stack;
150  mcontext_t uc_mcontext;
151  sigset_t uc_sigmask;
152  /* TODO: __fpregs_mem? */
153} ucontext_t;
154
155#elif defined(__mips__)
156
157/* glibc doesn't have names for MIPS registers. */
158
159#define NGREG 32
160#define NFPREG 32
161
162typedef unsigned long long greg_t;
163typedef greg_t gregset_t[NGREG];
164
165typedef struct fpregset {
166  union {
167    double fp_dregs[NFPREG];
168    struct {
169      float _fp_fregs;
170      unsigned _fp_pad;
171    } fp_fregs[NFPREG];
172  } fp_r;
173} fpregset_t;
174
175typedef struct {
176  unsigned regmask;
177  unsigned status;
178  greg_t pc;
179  gregset_t gregs;
180  fpregset_t fpregs;
181  unsigned fp_owned;
182  unsigned fpc_csr;
183  unsigned fpc_eir;
184  unsigned used_math;
185  unsigned dsp;
186  greg_t mdhi;
187  greg_t mdlo;
188  unsigned long hi1;
189  unsigned long lo1;
190  unsigned long hi2;
191  unsigned long lo2;
192  unsigned long hi3;
193  unsigned long lo3;
194} mcontext_t;
195
196typedef struct ucontext {
197  unsigned long uc_flags;
198  struct ucontext* uc_link;
199  stack_t uc_stack;
200  mcontext_t uc_mcontext;
201  sigset_t uc_sigmask;
202} ucontext_t;
203
204#elif defined(__mips64__)
205
206#error TODO
207
208#elif defined(__x86_64__)
209
210enum {
211  REG_R8 = 0,
212  REG_R9,
213  REG_R10,
214  REG_R11,
215  REG_R12,
216  REG_R13,
217  REG_R14,
218  REG_R15,
219  REG_RDI,
220  REG_RSI,
221  REG_RBP,
222  REG_RBX,
223  REG_RDX,
224  REG_RAX,
225  REG_RCX,
226  REG_RSP,
227  REG_RIP,
228  REG_EFL,
229  REG_CSGSFS,
230  REG_ERR,
231  REG_TRAPNO,
232  REG_OLDMASK,
233  REG_CR2,
234  NGREG
235};
236
237typedef long greg_t;
238typedef greg_t gregset_t[NGREG];
239
240typedef struct user_i387_struct* fpregset_t;
241
242typedef struct {
243  gregset_t gregs;
244  fpregset_t fpregs;
245  /* TODO: reserved space? */
246} mcontext_t;
247
248typedef struct ucontext {
249  unsigned long uc_flags;
250  struct ucontext* uc_link;
251  stack_t uc_stack;
252  mcontext_t uc_mcontext;
253  sigset_t uc_sigmask;
254  /* TODO: __fpregs_mem? */
255} ucontext_t;
256
257#endif
258
259__END_DECLS
260
261#endif /* _SYS_UCONTEXT_H_ */
262