/*
 * Copyright (C) 2013 The Android Open Source Project
 * 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.
 *
 * 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.
 */

#pragma once

#include <sys/cdefs.h>
#include <stddef.h> /* For size_t. */
#include <stdint.h>

__BEGIN_DECLS

#define PAGE_SIZE 4096
#define PAGE_MASK (~(PAGE_SIZE - 1))

#if defined(__i386__)

struct user_fpregs_struct {
  long cwd;
  long swd;
  long twd;
  long fip;
  long fcs;
  long foo;
  long fos;
  long st_space[20];
};
struct user_fpxregs_struct {
  unsigned short cwd;
  unsigned short swd;
  unsigned short twd;
  unsigned short fop;
  long fip;
  long fcs;
  long foo;
  long fos;
  long mxcsr;
  long reserved;
  long st_space[32];
  long xmm_space[32];
  long padding[56];
};
struct user_regs_struct {
  long ebx;
  long ecx;
  long edx;
  long esi;
  long edi;
  long ebp;
  long eax;
  long xds;
  long xes;
  long xfs;
  long xgs;
  long orig_eax;
  long eip;
  long xcs;
  long eflags;
  long esp;
  long xss;
};
struct user {
  struct user_regs_struct regs;
  int u_fpvalid;
  struct user_fpregs_struct i387;
  unsigned long int u_tsize;
  unsigned long int u_dsize;
  unsigned long int u_ssize;
  unsigned long start_code;
  unsigned long start_stack;
  long int signal;
  int reserved;
  struct user_regs_struct* u_ar0;
  struct user_fpregs_struct* u_fpstate;
  unsigned long magic;
  char u_comm[32];
  int u_debugreg[8];
};

#define UPAGES 1
#define HOST_TEXT_START_ADDR (u.start_code)
#define HOST_STACK_END_ADDR (u.start_stack + u.u_ssize * PAGE_SIZE)

#elif defined(__x86_64__)

struct user_fpregs_struct {
  unsigned short cwd;
  unsigned short swd;
  unsigned short ftw;
  unsigned short fop;
  unsigned long rip;
  unsigned long rdp;
  unsigned int mxcsr;
  unsigned int mxcr_mask;
  unsigned int st_space[32];
  unsigned int xmm_space[64];
  unsigned int padding[24];
};
struct user_regs_struct {
  unsigned long r15;
  unsigned long r14;
  unsigned long r13;
  unsigned long r12;
  unsigned long rbp;
  unsigned long rbx;
  unsigned long r11;
  unsigned long r10;
  unsigned long r9;
  unsigned long r8;
  unsigned long rax;
  unsigned long rcx;
  unsigned long rdx;
  unsigned long rsi;
  unsigned long rdi;
  unsigned long orig_rax;
  unsigned long rip;
  unsigned long cs;
  unsigned long eflags;
  unsigned long rsp;
  unsigned long ss;
  unsigned long fs_base;
  unsigned long gs_base;
  unsigned long ds;
  unsigned long es;
  unsigned long fs;
  unsigned long gs;
};
struct user {
  struct user_regs_struct regs;
  int u_fpvalid;
  int pad0;
  struct user_fpregs_struct i387;
  unsigned long int u_tsize;
  unsigned long int u_dsize;
  unsigned long int u_ssize;
  unsigned long start_code;
  unsigned long start_stack;
  long int signal;
  int reserved;
  int pad1;
  struct user_regs_struct* u_ar0;
  struct user_fpregs_struct* u_fpstate;
  unsigned long magic;
  char u_comm[32];
  unsigned long u_debugreg[8];
  unsigned long error_code;
  unsigned long fault_address;
};

#elif defined(__arm__)

struct user_fpregs {
  struct fp_reg {
    unsigned int sign1:1;
    unsigned int unused:15;
    unsigned int sign2:1;
    unsigned int exponent:14;
    unsigned int j:1;
    unsigned int mantissa1:31;
    unsigned int mantissa0:32;
  } fpregs[8];
  unsigned int fpsr:32;
  unsigned int fpcr:32;
  unsigned char ftype[8];
  unsigned int init_flag;
};
struct user_regs {
  unsigned long uregs[18];
};
struct user_vfp {
  unsigned long long fpregs[32];
  unsigned long fpscr;
};
struct user_vfp_exc {
  unsigned long fpexc;
  unsigned long fpinst;
  unsigned long fpinst2;
};
struct user {
  struct user_regs regs;
  int u_fpvalid;
  unsigned long int u_tsize;
  unsigned long int u_dsize;
  unsigned long int u_ssize;
  unsigned long start_code;
  unsigned long start_stack;
  long int signal;
  int reserved;
  struct user_regs* u_ar0;
  unsigned long magic;
  char u_comm[32];
  int u_debugreg[8];
  struct user_fpregs u_fp;
  struct user_fpregs* u_fp0;
};

#elif defined(__aarch64__)

struct user_regs_struct {
  uint64_t regs[31];
  uint64_t sp;
  uint64_t pc;
  uint64_t pstate;
};
struct user_fpsimd_struct {
  __uint128_t vregs[32];
  uint32_t fpsr;
  uint32_t fpcr;
};

#elif defined(__riscv)

// This space deliberately left blank for now.
// No other libcs have any riscv64-specific structs.

#else

#error "Unsupported architecture."

#endif

__END_DECLS