Ucontext.h revision d226a5140989f509a0ed3e2723f05d5fc93ce8df 
1/*
2 * Copyright (C) 2016 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 _LIBUNWINDSTACK_UCONTEXT_H
30#define _LIBUNWINDSTACK_UCONTEXT_H
31
32#include <stdint.h>
33
34namespace unwindstack {
35
36//-------------------------------------------------------------------
37// ARM ucontext structures
38//-------------------------------------------------------------------
39struct arm_stack_t {
40  uint32_t ss_sp;    // void __user*
41  int32_t ss_flags;  // int
42  uint32_t ss_size;  // size_t
43};
44
45struct arm_mcontext_t {
46  uint32_t trap_no;             // unsigned long
47  uint32_t error_code;          // unsigned long
48  uint32_t oldmask;             // unsigned long
49  uint32_t regs[ARM_REG_LAST];  // unsigned long
50  uint32_t cpsr;                // unsigned long
51  uint32_t fault_address;       // unsigned long
52};
53
54struct arm_ucontext_t {
55  uint32_t uc_flags;  // unsigned long
56  uint32_t uc_link;   // struct ucontext*
57  arm_stack_t uc_stack;
58  arm_mcontext_t uc_mcontext;
59  // Nothing else is used, so don't define it.
60};
61//-------------------------------------------------------------------
62
63//-------------------------------------------------------------------
64// ARM64 ucontext structures
65//-------------------------------------------------------------------
66struct arm64_stack_t {
67  uint64_t ss_sp;    // void __user*
68  int32_t ss_flags;  // int
69  uint64_t ss_size;  // size_t
70};
71
72struct arm64_sigset_t {
73  uint64_t sig;  // unsigned long
74};
75
76struct arm64_mcontext_t {
77  uint64_t fault_address;         // __u64
78  uint64_t regs[ARM64_REG_LAST];  // __u64
79  uint64_t pstate;                // __u64
80  // Nothing else is used, so don't define it.
81};
82
83struct arm64_ucontext_t {
84  uint64_t uc_flags;  // unsigned long
85  uint64_t uc_link;   // struct ucontext*
86  arm64_stack_t uc_stack;
87  arm64_sigset_t uc_sigmask;
88  // The kernel adds extra padding after uc_sigmask to match glibc sigset_t on ARM64.
89  char __padding[128 - sizeof(arm64_sigset_t)];
90  // The full structure requires 16 byte alignment, but our partial structure
91  // doesn't, so force the alignment.
92  arm64_mcontext_t uc_mcontext __attribute__((aligned(16)));
93};
94//-------------------------------------------------------------------
95
96//-------------------------------------------------------------------
97// X86 ucontext structures
98//-------------------------------------------------------------------
99struct x86_stack_t {
100  uint32_t ss_sp;    // void __user*
101  int32_t ss_flags;  // int
102  uint32_t ss_size;  // size_t
103};
104
105struct x86_mcontext_t {
106  uint32_t gs;
107  uint32_t fs;
108  uint32_t es;
109  uint32_t ds;
110  uint32_t edi;
111  uint32_t esi;
112  uint32_t ebp;
113  uint32_t esp;
114  uint32_t ebx;
115  uint32_t edx;
116  uint32_t ecx;
117  uint32_t eax;
118  uint32_t trapno;
119  uint32_t err;
120  uint32_t eip;
121  uint32_t cs;
122  uint32_t efl;
123  uint32_t uesp;
124  uint32_t ss;
125  // Only care about the registers, skip everything else.
126};
127
128struct x86_ucontext_t {
129  uint32_t uc_flags;  // unsigned long
130  uint32_t uc_link;   // struct ucontext*
131  x86_stack_t uc_stack;
132  x86_mcontext_t uc_mcontext;
133  // Nothing else is used, so don't define it.
134};
135//-------------------------------------------------------------------
136
137//-------------------------------------------------------------------
138// X86_64 ucontext structures
139//-------------------------------------------------------------------
140struct x86_64_stack_t {
141  uint64_t ss_sp;    // void __user*
142  int32_t ss_flags;  // int
143  uint64_t ss_size;  // size_t
144};
145
146struct x86_64_mcontext_t {
147  uint64_t r8;
148  uint64_t r9;
149  uint64_t r10;
150  uint64_t r11;
151  uint64_t r12;
152  uint64_t r13;
153  uint64_t r14;
154  uint64_t r15;
155  uint64_t rdi;
156  uint64_t rsi;
157  uint64_t rbp;
158  uint64_t rbx;
159  uint64_t rdx;
160  uint64_t rax;
161  uint64_t rcx;
162  uint64_t rsp;
163  uint64_t rip;
164  uint64_t efl;
165  uint64_t csgsfs;
166  uint64_t err;
167  uint64_t trapno;
168  uint64_t oldmask;
169  uint64_t cr2;
170  // Only care about the registers, skip everything else.
171};
172
173typedef struct x86_64_ucontext {
174  uint64_t uc_flags;  // unsigned long
175  uint64_t uc_link;   // struct ucontext*
176  x86_64_stack_t uc_stack;
177  x86_64_mcontext_t uc_mcontext;
178  // Nothing else is used, so don't define it.
179} x86_64_ucontext_t;
180//-------------------------------------------------------------------
181
182}  // namespace unwindstack
183
184#endif  // _LIBUNWINDSTACK_UCONTEXT_H
185