xref: /external/compiler-rt/android/include/sys/ucontext.h

//===-- ucontext.h ----------------------------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
// ===----------------------------------------------------------------------===

#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__)

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