1// Copyright 2014 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef SANDBOX_LINUX_SERVICES_ANDROID_X86_64_UCONTEXT_H_
6#define SANDBOX_LINUX_SERVICES_ANDROID_X86_64_UCONTEXT_H_
7
8// We do something compatible with glibc. Hopefully, at some point Android will
9// provide that for us, and __BIONIC_HAVE_UCONTEXT_T should be defined.
10// Spec:
11// http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-AMD64/LSB-Core-AMD64/libc-ddefs.html#AEN5668
12
13#if !defined(__BIONIC_HAVE_UCONTEXT_T)
14#include <asm/sigcontext.h>
15
16struct _libc_fpxreg {
17  unsigned short significand[4];
18  unsigned short exponent;
19  unsigned short padding[3];
20};
21
22struct _libc_xmmreg {
23  uint32_t element[4];
24};
25
26struct _libc_fpstate {
27  uint16_t cwd;
28  uint16_t swd;
29  uint16_t twd;
30  uint16_t fop;
31  uint64_t rip;
32  uint64_t rdp;
33  uint32_t mxcsr;
34  uint32_t mxcsr_mask;
35  struct _libc_fpxreg _st[8];
36  struct _libc_xmmreg _xmm[16];
37  uint32_t padding[24];
38};
39
40typedef uint64_t greg_t;
41
42typedef struct {
43  greg_t gregs[23];
44  struct _libc_fpstate* fpregs;
45  unsigned long __reserved1[8];
46} mcontext_t;
47
48enum {
49  REG_R8 = 0,
50  REG_R9,
51  REG_R10,
52  REG_R11,
53  REG_R12,
54  REG_R13,
55  REG_R14,
56  REG_R15,
57  REG_RDI,
58  REG_RSI,
59  REG_RBP,
60  REG_RBX,
61  REG_RDX,
62  REG_RAX,
63  REG_RCX,
64  REG_RSP,
65  REG_RIP,
66  REG_EFL,
67  REG_CSGSFS,
68  REG_ERR,
69  REG_TRAPNO,
70  REG_OLDMASK,
71  REG_CR2,
72  NGREG,
73};
74
75typedef struct ucontext {
76  unsigned long uc_flags;
77  struct ucontext* uc_link;
78  stack_t uc_stack;
79  mcontext_t uc_mcontext;
80  sigset_t uc_sigmask;
81  struct _libc_fpstate __fpregs_mem;
82} ucontext_t;
83
84#else
85#include <sys/ucontext.h>
86#endif  // __BIONIC_HAVE_UCONTEXT_T
87
88#endif  // SANDBOX_LINUX_SERVICES_ANDROID_X86_64_UCONTEXT_H_
89