sysdeps/unix/sysv/linux/x86/sys/ucontext.h

   1 /* Copyright (C) 2001-2015 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #ifndef _SYS_UCONTEXT_H
  19 #define _SYS_UCONTEXT_H 1
  20
  21 #include <features.h>
  22 #include <signal.h>
  23
  24 /* We need the signal context definitions even if they are not used
  25    included in <signal.h>.  */
  26 #include <bits/sigcontext.h>
  27
  28 #ifdef __x86_64__
  29
  30 /* Type for general register.  */
  31 __extension__ typedef long long int greg_t;
  32
  33 /* Number of general registers.  */
  34 #define NGREG   23
  35
  36 /* Container for all general registers.  */
  37 typedef greg_t gregset_t[NGREG];
  38
  39 #ifdef __USE_GNU
  40 /* Number of each register in the `gregset_t' array.  */
  41 enum
  42 {
  43   REG_R8 = 0,
  44 # define REG_R8         REG_R8
  45   REG_R9,
  46 # define REG_R9         REG_R9
  47   REG_R10,
  48 # define REG_R10        REG_R10
  49   REG_R11,
  50 # define REG_R11        REG_R11
  51   REG_R12,
  52 # define REG_R12        REG_R12
  53   REG_R13,
  54 # define REG_R13        REG_R13
  55   REG_R14,
  56 # define REG_R14        REG_R14
  57   REG_R15,
  58 # define REG_R15        REG_R15
  59   REG_RDI,
  60 # define REG_RDI        REG_RDI
  61   REG_RSI,
  62 # define REG_RSI        REG_RSI
  63   REG_RBP,
  64 # define REG_RBP        REG_RBP
  65   REG_RBX,
  66 # define REG_RBX        REG_RBX
  67   REG_RDX,
  68 # define REG_RDX        REG_RDX
  69   REG_RAX,
  70 # define REG_RAX        REG_RAX
  71   REG_RCX,
  72 # define REG_RCX        REG_RCX
  73   REG_RSP,
  74 # define REG_RSP        REG_RSP
  75   REG_RIP,
  76 # define REG_RIP        REG_RIP
  77   REG_EFL,
  78 # define REG_EFL        REG_EFL
  79   REG_CSGSFS,           /* Actually short cs, gs, fs, __pad0.  */
  80 # define REG_CSGSFS     REG_CSGSFS
  81   REG_ERR,
  82 # define REG_ERR        REG_ERR
  83   REG_TRAPNO,
  84 # define REG_TRAPNO     REG_TRAPNO
  85   REG_OLDMASK,
  86 # define REG_OLDMASK    REG_OLDMASK
  87   REG_CR2
  88 # define REG_CR2        REG_CR2
  89 };
  90 #endif
  91
  92 struct _libc_fpxreg
  93 {
  94   unsigned short int significand[4];
  95   unsigned short int exponent;
  96   unsigned short int padding[3];
  97 };
  98
  99 struct _libc_xmmreg
 100 {
 101   __uint32_t    element[4];
 102 };
 103
 104 struct _libc_fpstate
 105 {
 106   /* 64-bit FXSAVE format.  */
 107   __uint16_t            cwd;
 108   __uint16_t            swd;
 109   __uint16_t            ftw;
 110   __uint16_t            fop;
 111   __uint64_t            rip;
 112   __uint64_t            rdp;
 113   __uint32_t            mxcsr;
 114   __uint32_t            mxcr_mask;
 115   struct _libc_fpxreg   _st[8];
 116   struct _libc_xmmreg   _xmm[16];
 117   __uint32_t            padding[24];
 118 };
 119
 120 /* Structure to describe FPU registers.  */
 121 typedef struct _libc_fpstate *fpregset_t;
 122
 123 /* Context to describe whole processor state.  */
 124 typedef struct
 125   {
 126     gregset_t gregs;
 127     /* Note that fpregs is a pointer.  */
 128     fpregset_t fpregs;
 129     __extension__ unsigned long long __reserved1 [8];
 130 } mcontext_t;
 131
 132 /* Userlevel context.  */
 133 typedef struct ucontext
 134   {
 135     unsigned long int uc_flags;
 136     struct ucontext *uc_link;
 137     stack_t uc_stack;
 138     mcontext_t uc_mcontext;
 139     __sigset_t uc_sigmask;
 140     struct _libc_fpstate __fpregs_mem;
 141   } ucontext_t;
 142
 143 #else /* !__x86_64__ */
 144
 145 /* Type for general register.  */
 146 typedef int greg_t;
 147
 148 /* Number of general registers.  */
 149 #define NGREG   19
 150
 151 /* Container for all general registers.  */
 152 typedef greg_t gregset_t[NGREG];
 153
 154 #ifdef __USE_GNU
 155 /* Number of each register is the `gregset_t' array.  */
 156 enum
 157 {
 158   REG_GS = 0,
 159 # define REG_GS         REG_GS
 160   REG_FS,
 161 # define REG_FS         REG_FS
 162   REG_ES,
 163 # define REG_ES         REG_ES
 164   REG_DS,
 165 # define REG_DS         REG_DS
 166   REG_EDI,
 167 # define REG_EDI        REG_EDI
 168   REG_ESI,
 169 # define REG_ESI        REG_ESI
 170   REG_EBP,
 171 # define REG_EBP        REG_EBP
 172   REG_ESP,
 173 # define REG_ESP        REG_ESP
 174   REG_EBX,
 175 # define REG_EBX        REG_EBX
 176   REG_EDX,
 177 # define REG_EDX        REG_EDX
 178   REG_ECX,
 179 # define REG_ECX        REG_ECX
 180   REG_EAX,
 181 # define REG_EAX        REG_EAX
 182   REG_TRAPNO,
 183 # define REG_TRAPNO     REG_TRAPNO
 184   REG_ERR,
 185 # define REG_ERR        REG_ERR
 186   REG_EIP,
 187 # define REG_EIP        REG_EIP
 188   REG_CS,
 189 # define REG_CS         REG_CS
 190   REG_EFL,
 191 # define REG_EFL        REG_EFL
 192   REG_UESP,
 193 # define REG_UESP       REG_UESP
 194   REG_SS
 195 # define REG_SS REG_SS
 196 };
 197 #endif
 198
 199 /* Definitions taken from the kernel headers.  */
 200 struct _libc_fpreg
 201 {
 202   unsigned short int significand[4];
 203   unsigned short int exponent;
 204 };
 205
 206 struct _libc_fpstate
 207 {
 208   unsigned long int cw;
 209   unsigned long int sw;
 210   unsigned long int tag;
 211   unsigned long int ipoff;
 212   unsigned long int cssel;
 213   unsigned long int dataoff;
 214   unsigned long int datasel;
 215   struct _libc_fpreg _st[8];
 216   unsigned long int status;
 217 };
 218
 219 /* Structure to describe FPU registers.  */
 220 typedef struct _libc_fpstate *fpregset_t;
 221
 222 /* Context to describe whole processor state.  */
 223 typedef struct
 224   {
 225     gregset_t gregs;
 226     /* Due to Linux's history we have to use a pointer here.  The SysV/i386
 227        ABI requires a struct with the values.  */
 228     fpregset_t fpregs;
 229     unsigned long int oldmask;
 230     unsigned long int cr2;
 231   } mcontext_t;
 232
 233 /* Userlevel context.  */
 234 typedef struct ucontext
 235   {
 236     unsigned long int uc_flags;
 237     struct ucontext *uc_link;
 238     stack_t uc_stack;
 239     mcontext_t uc_mcontext;
 240     __sigset_t uc_sigmask;
 241     struct _libc_fpstate __fpregs_mem;
 242   } ucontext_t;
 243
 244 #endif /* !__x86_64__ */
 245
 246 #endif /* sys/ucontext.h */