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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_SYSTEM_HEADERS_X86_64_LINUX_UCONTEXT_H_
6 #define SANDBOX_LINUX_SYSTEM_HEADERS_X86_64_LINUX_UCONTEXT_H_
7 
8 #include <stdint.h>
9 
10 // We do something compatible with glibc. Hopefully, at some point Android will
11 // provide that for us, and __BIONIC_HAVE_UCONTEXT_T should be defined.
12 // Spec:
13 // http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-AMD64/LSB-Core-AMD64/libc-ddefs.html#AEN5668
14 
15 #if !defined(__BIONIC_HAVE_UCONTEXT_T)
16 #include <asm/sigcontext.h>
17 
18 struct _libc_fpxreg {
19   unsigned short significand[4];
20   unsigned short exponent;
21   unsigned short padding[3];
22 };
23 
24 struct _libc_xmmreg {
25   uint32_t element[4];
26 };
27 
28 struct _libc_fpstate {
29   uint16_t cwd;
30   uint16_t swd;
31   uint16_t twd;
32   uint16_t fop;
33   uint64_t rip;
34   uint64_t rdp;
35   uint32_t mxcsr;
36   uint32_t mxcsr_mask;
37   struct _libc_fpxreg _st[8];
38   struct _libc_xmmreg _xmm[16];
39   uint32_t padding[24];
40 };
41 
42 typedef uint64_t greg_t;
43 
44 typedef struct {
45   greg_t gregs[23];
46   struct _libc_fpstate* fpregs;
47   unsigned long __reserved1[8];
48 } mcontext_t;
49 
50 enum {
51   REG_R8 = 0,
52   REG_R9,
53   REG_R10,
54   REG_R11,
55   REG_R12,
56   REG_R13,
57   REG_R14,
58   REG_R15,
59   REG_RDI,
60   REG_RSI,
61   REG_RBP,
62   REG_RBX,
63   REG_RDX,
64   REG_RAX,
65   REG_RCX,
66   REG_RSP,
67   REG_RIP,
68   REG_EFL,
69   REG_CSGSFS,
70   REG_ERR,
71   REG_TRAPNO,
72   REG_OLDMASK,
73   REG_CR2,
74   NGREG,
75 };
76 
77 typedef struct ucontext {
78   unsigned long uc_flags;
79   struct ucontext* uc_link;
80   stack_t uc_stack;
81   mcontext_t uc_mcontext;
82   sigset_t uc_sigmask;
83   struct _libc_fpstate __fpregs_mem;
84 } ucontext_t;
85 
86 #else
87 #include <sys/ucontext.h>
88 #endif  // __BIONIC_HAVE_UCONTEXT_T
89 
90 #endif  // SANDBOX_LINUX_SYSTEM_HEADERS_X86_64_LINUX_UCONTEXT_H_
91