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 // Copyright (c) 2012, Google Inc.

 // All rights reserved.

 //

 // Redistribution and use in source and binary forms, with or without

 // modification, are permitted provided that the following conditions are

 // met:

 //

 //     * Redistributions of source code must retain the above copyright

 // notice, this list of conditions and the following disclaimer.

 //     * Redistributions in binary form must reproduce the above

 // copyright notice, this list of conditions and the following disclaimer

 // in the documentation and/or other materials provided with the

 // distribution.

 //     * Neither the name of Google Inc. nor the names of its

 // contributors may be used to endorse or promote products derived from

 // this software without specific prior written permission.

 //

 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 #ifndef GOOGLE_BREAKPAD_COMMON_ANDROID_INCLUDE_SYS_UCONTEXT_H

 #define GOOGLE_BREAKPAD_COMMON_ANDROID_INCLUDE_SYS_UCONTEXT_H

 #include <sys/cdefs.h>

 #include <signal.h>

 #ifdef __cplusplus

 extern "C" {

 #endif  // __cplusplus

 #ifndef __BIONIC_HAVE_UCONTEXT_T

 // Ensure that 'stack_t' is defined.

 #include <asm/signal.h>

 // This version of the Android C library headers do not provide ucontext_t.

 // Provide custom definitions for Google Breakpad.

 #if defined(__arm__)

 // Ensure that 'struct sigcontext' is defined.

 #include <asm/sigcontext.h>

 typedef struct sigcontext mcontext_t;

 // The ARM kernel uses a 64-bit signal mask.

 typedef uint32_t  kernel_sigmask_t[2];

 typedef struct ucontext {

   uint32_t uc_flags;

   struct ucontext* uc_link;

   stack_t uc_stack;

   mcontext_t uc_mcontext;

   kernel_sigmask_t uc_sigmask;

   // Other fields are not used by Google Breakpad. Don't define them.

 } ucontext_t;

 #elif defined(__i386__)

 /* 80-bit floating-point register */

 struct _libc_fpreg {

   unsigned short significand[4];

   unsigned short exponent;

 };

 /* Simple floating-point state, see FNSTENV instruction */

 struct _libc_fpstate {

   unsigned long cw;

   unsigned long sw;

   unsigned long tag;

   unsigned long ipoff;

   unsigned long cssel;

   unsigned long dataoff;

   unsigned long datasel;

   struct _libc_fpreg _st[8];

   unsigned long status;

 };

 typedef uint32_t  greg_t;

 typedef struct {

   uint32_t gregs[19];

   struct _libc_fpstate* fpregs;

   uint32_t oldmask;

   uint32_t cr2;

 } mcontext_t;

 enum {

   REG_GS = 0,

   REG_FS,

   REG_ES,

   REG_DS,

   REG_EDI,

   REG_ESI,

   REG_EBP,

   REG_ESP,

   REG_EBX,

   REG_EDX,

   REG_ECX,

   REG_EAX,

   REG_TRAPNO,

   REG_ERR,

   REG_EIP,

   REG_CS,

   REG_EFL,

   REG_UESP,

   REG_SS,

 };

 // The i386 kernel uses a 64-bit signal mask.

 typedef uint32_t kernel_sigmask_t[2];

 typedef struct ucontext {

   uint32_t uc_flags;

   struct ucontext* uc_link;

   stack_t uc_stack;

   mcontext_t uc_mcontext;

   kernel_sigmask_t uc_sigmask;

   struct _libc_fpstate __fpregs_mem;

 } ucontext_t;

 #elif defined(__mips__)

 // Not supported by Google Breakpad at this point, but just in case.

 typedef struct {

   uint32_t regmask;

   uint32_t status;

   uint64_t pc;

   uint64_t gregs[32];

   uint64_t fpregs[32];

   uint32_t acx;

   uint32_t fpc_csr;

   uint32_t fpc_eir;

   uint32_t used_math;

   uint32_t dsp;

   uint64_t mdhi;

   uint64_t mdlo;

   uint32_t hi1;

   uint32_t lo1;

   uint32_t hi2;

   uint32_t lo2;

   uint32_t hi3;

   uint32_t lo3;

 } mcontext_t;

 // The MIPS kernel uses a 128-bit signal mask.

 typedef uint32_t kernel_sigmask_t[4];

 typedef struct ucontext {

   uint32_t uc_flags;

   struct ucontext* uc_link;

   stack_t uc_stack;

   mcontext_t uc_mcontext;

   kernel_sigmask_t uc_sigmask;

   // Other fields are not used by Google Breakpad. Don't define them.

 } ucontext_t;

 #else

 #  error "Unsupported Android CPU ABI!"

 #endif

 #endif  // __BIONIC_HAVE_UCONTEXT_T

 #ifdef __cplusplus

 }  // extern "C"

 #endif  // __cplusplus

 #endif  // GOOGLE_BREAKPAD_COMMON_ANDROID_INCLUDE_SYS_UCONTEXT_H