Add x86_64 ucontext structure for Android x64

BUG=346626

Review URL: https://codereview.chromium.org/204983015

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@259817 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 90 insertions, 0 deletions

diff --git a/sandbox/linux/services/android_ucontext.h b/sandbox/linux/services/android_ucontext.h
index 437bbab..caabaf5 100644
--- a/sandbox/linux/services/android_ucontext.h
+++ b/sandbox/linux/services/android_ucontext.h
@@ -11,6 +11,8 @@
 #include "sandbox/linux/services/android_arm_ucontext.h"
 #elif defined(__i386__)
 #include "sandbox/linux/services/android_i386_ucontext.h"
+#elif defined(__x86_64__)
+#include "sandbox/linux/services/android_x86_64_ucontext.h"
 #else
 #error "No support for your architecture in Android header"
 #endif
diff --git a/sandbox/linux/services/android_x86_64_ucontext.h b/sandbox/linux/services/android_x86_64_ucontext.h
new file mode 100644
index 0000000..ef328e5
--- /dev/null
+++ b/sandbox/linux/services/android_x86_64_ucontext.h
@@ -0,0 +1,88 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef SANDBOX_LINUX_SERVICES_ANDROID_X86_64_UCONTEXT_H_
+#define SANDBOX_LINUX_SERVICES_ANDROID_X86_64_UCONTEXT_H_
+
+// We do something compatible with glibc. Hopefully, at some point Android will
+// provide that for us, and __BIONIC_HAVE_UCONTEXT_T should be defined.
+// Spec:
+// http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-AMD64/LSB-Core-AMD64/libc-ddefs.html#AEN5668
+
+#if !defined(__BIONIC_HAVE_UCONTEXT_T)
+#include <asm/sigcontext.h>
+
+struct _libc_fpxreg {
+  unsigned short significand[4];
+  unsigned short exponent;
+  unsigned short padding[3];
+};
+
+struct _libc_xmmreg {
+  uint32_t element[4];
+};
+
+struct _libc_fpstate {
+  uint16_t cwd;
+  uint16_t swd;
+  uint16_t twd;
+  uint16_t fop;
+  uint64_t rip;
+  uint64_t rdp;
+  uint32_t mxcsr;
+  uint32_t mxcsr_mask;
+  struct _libc_fpxreg _st[8];
+  struct _libc_xmmreg _xmm[16];
+  uint32_t padding[24];
+};
+
+typedef uint64_t greg_t;
+
+typedef struct {
+  greg_t gregs[23];
+  struct _libc_fpstate* fpregs;
+  unsigned long __reserved1[8];
+} mcontext_t;
+
+enum {
+  REG_R8 = 0,
+  REG_R9,
+  REG_R10,
+  REG_R11,
+  REG_R12,
+  REG_R13,
+  REG_R14,
+  REG_R15,
+  REG_RDI,
+  REG_RSI,
+  REG_RBP,
+  REG_RBX,
+  REG_RDX,
+  REG_RAX,
+  REG_RCX,
+  REG_RSP,
+  REG_RIP,
+  REG_EFL,
+  REG_CSGSFS,
+  REG_ERR,
+  REG_TRAPNO,
+  REG_OLDMASK,
+  REG_CR2,
+  NGREG,
+};
+
+typedef struct ucontext {
+  unsigned long uc_flags;
+  struct ucontext* uc_link;
+  stack_t uc_stack;
+  mcontext_t uc_mcontext;
+  sigset_t uc_sigmask;
+  struct _libc_fpstate __fpregs_mem;
+} ucontext_t;
+
+#else
+#include <sys/ucontext.h>
+#endif  // __BIONIC_HAVE_UCONTEXT_T
+
+#endif  // SANDBOX_LINUX_SERVICES_ANDROID_X86_64_UCONTEXT_H_