text: /* Copyright (C) 2001-2016 Free Software Foundation, Inc.
     This file is part of the GNU C Library.
  
     The GNU C Library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Lesser General Public
     License as published by the Free Software Foundation; either
     version 2.1 of the License, or (at your option) any later version.
  
     The GNU C Library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Lesser General Public License for more details.
  
     You should have received a copy of the GNU Lesser General Public
     License along with the GNU C Library; if not, see
     <http://www.gnu.org/licenses/>.  */
  
  #ifndef _SYS_UCONTEXT_H
  #define _SYS_UCONTEXT_H	1
  
  #include <features.h>
  #include <signal.h>
  
  /* We need the signal context definitions even if they are not used
     included in <signal.h>.  */
  #include <bits/sigcontext.h>
  
  #ifdef __x86_64__
  
  /* Type for general register.  */
  __extension__ typedef long long int greg_t;
  
  /* Number of general registers.  */
  #define NGREG	23
  
  /* Container for all general registers.  */
  typedef greg_t gregset_t[NGREG];
  
  #ifdef __USE_GNU
  /* Number of each register in the `gregset_t' array.  */
  enum
  {
    REG_R8 = 0,
  # define REG_R8		REG_R8
    REG_R9,
  # define REG_R9		REG_R9
    REG_R10,
  # define REG_R10	REG_R10
    REG_R11,
  # define REG_R11	REG_R11
    REG_R12,
  # define REG_R12	REG_R12
    REG_R13,
  # define REG_R13	REG_R13
    REG_R14,
  # define REG_R14	REG_R14
    REG_R15,
  # define REG_R15	REG_R15
    REG_RDI,
  # define REG_RDI	REG_RDI
    REG_RSI,
  # define REG_RSI	REG_RSI
    REG_RBP,
  # define REG_RBP	REG_RBP
    REG_RBX,
  # define REG_RBX	REG_RBX
    REG_RDX,
  # define REG_RDX	REG_RDX
    REG_RAX,
  # define REG_RAX	REG_RAX
    REG_RCX,
  # define REG_RCX	REG_RCX
    REG_RSP,
  # define REG_RSP	REG_RSP
    REG_RIP,
  # define REG_RIP	REG_RIP
    REG_EFL,
  # define REG_EFL	REG_EFL
    REG_CSGSFS,		/* Actually short cs, gs, fs, __pad0.  */
  # define REG_CSGSFS	REG_CSGSFS
    REG_ERR,
  # define REG_ERR	REG_ERR
    REG_TRAPNO,
  # define REG_TRAPNO	REG_TRAPNO
    REG_OLDMASK,
  # define REG_OLDMASK	REG_OLDMASK
    REG_CR2
  # define REG_CR2	REG_CR2
  };
  #endif
  
  struct _libc_fpxreg
  {
    unsigned short int significand[4];
    unsigned short int exponent;
    unsigned short int padding[3];
  };
  
  struct _libc_xmmreg
  {
    __uint32_t	element[4];
  };
  
  struct _libc_fpstate
  {
    /* 64-bit FXSAVE format.  */
    __uint16_t		cwd;
    __uint16_t		swd;
    __uint16_t		ftw;
    __uint16_t		fop;
    __uint64_t		rip;
    __uint64_t		rdp;
    __uint32_t		mxcsr;
    __uint32_t		mxcr_mask;
    struct _libc_fpxreg	_st[8];
    struct _libc_xmmreg	_xmm[16];
    __uint32_t		padding[24];
  };
  
  /* Structure to describe FPU registers.  */
  typedef struct _libc_fpstate *fpregset_t;
  
  /* Context to describe whole processor state.  */
  typedef struct
    {
      gregset_t gregs;
      /* Note that fpregs is a pointer.  */
      fpregset_t fpregs;
      __extension__ unsigned long long __reserved1 [8];
  } mcontext_t;
  
  /* Userlevel context.  */
  typedef struct ucontext
    {
      unsigned long int 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 /* !__x86_64__ */
  
  /* Type for general register.  */
  typedef int greg_t;
  
  /* Number of general registers.  */
  #define NGREG	19
  
  /* Container for all general registers.  */
  typedef greg_t gregset_t[NGREG];
  
  #ifdef __USE_GNU
  /* Number of each register is the `gregset_t' array.  */
  enum
  {
    REG_GS = 0,
  # define REG_GS		REG_GS
    REG_FS,
  # define REG_FS		REG_FS
    REG_ES,
  # define REG_ES		REG_ES
    REG_DS,
  # define REG_DS		REG_DS
    REG_EDI,
  # define REG_EDI	REG_EDI
    REG_ESI,
  # define REG_ESI	REG_ESI
    REG_EBP,
  # define REG_EBP	REG_EBP
    REG_ESP,
  # define REG_ESP	REG_ESP
    REG_EBX,
  # define REG_EBX	REG_EBX
    REG_EDX,
  # define REG_EDX	REG_EDX
    REG_ECX,
  # define REG_ECX	REG_ECX
    REG_EAX,
  # define REG_EAX	REG_EAX
    REG_TRAPNO,
  # define REG_TRAPNO	REG_TRAPNO
    REG_ERR,
  # define REG_ERR	REG_ERR
    REG_EIP,
  # define REG_EIP	REG_EIP
    REG_CS,
  # define REG_CS		REG_CS
    REG_EFL,
  # define REG_EFL	REG_EFL
    REG_UESP,
  # define REG_UESP	REG_UESP
    REG_SS
  # define REG_SS	REG_SS
  };
  #endif
  
  /* Definitions taken from the kernel headers.  */
  struct _libc_fpreg
  {
    unsigned short int significand[4];
    unsigned short int exponent;
  };
  
  struct _libc_fpstate
  {
    unsigned long int cw;
    unsigned long int sw;
    unsigned long int tag;
    unsigned long int ipoff;
    unsigned long int cssel;
    unsigned long int dataoff;
    unsigned long int datasel;
    struct _libc_fpreg _st[8];
    unsigned long int status;
  };
  
  /* Structure to describe FPU registers.  */
  typedef struct _libc_fpstate *fpregset_t;
  
  /* Context to describe whole processor state.  */
  typedef struct
    {
      gregset_t gregs;
      /* Due to Linux's history we have to use a pointer here.  The SysV/i386
         ABI requires a struct with the values.  */
      fpregset_t fpregs;
      unsigned long int oldmask;
      unsigned long int cr2;
    } mcontext_t;
  
  /* Userlevel context.  */
  typedef struct ucontext
    {
      unsigned long int 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;
  
  #endif /* !__x86_64__ */
  
  #endif /* sys/ucontext.h */
  