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

   1 /* Copyright (C) 2001-2016 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 exposed
  25    by <signal.h>.  */
  26 #include <bits/sigcontext.h>
  27 #include <bits/sigstack.h>
  28
  29
  30 #ifdef __x86_64__
  31
  32 /* Type for general register.  */
  33 __extension__ typedef long long int greg_t;
  34
  35 /* Number of general registers.  */
  36 #define NGREG   23
  37
  38 /* Container for all general registers.  */
  39 typedef greg_t gregset_t[NGREG];
  40
  41 #ifdef __USE_GNU
  42 /* Number of each register in the `gregset_t' array.  */
  43 enum
  44 {
  45   REG_R8 = 0,
  46 # define REG_R8         REG_R8
  47   REG_R9,
  48 # define REG_R9         REG_R9
  49   REG_R10,
  50 # define REG_R10        REG_R10
  51   REG_R11,
  52 # define REG_R11        REG_R11
  53   REG_R12,
  54 # define REG_R12        REG_R12
  55   REG_R13,
  56 # define REG_R13        REG_R13
  57   REG_R14,
  58 # define REG_R14        REG_R14
  59   REG_R15,
  60 # define REG_R15        REG_R15
  61   REG_RDI,
  62 # define REG_RDI        REG_RDI
  63   REG_RSI,
  64 # define REG_RSI        REG_RSI
  65   REG_RBP,
  66 # define REG_RBP        REG_RBP
  67   REG_RBX,
  68 # define REG_RBX        REG_RBX
  69   REG_RDX,
  70 # define REG_RDX        REG_RDX
  71   REG_RAX,
  72 # define REG_RAX        REG_RAX
  73   REG_RCX,
  74 # define REG_RCX        REG_RCX
  75   REG_RSP,
  76 # define REG_RSP        REG_RSP
  77   REG_RIP,
  78 # define REG_RIP        REG_RIP
  79   REG_EFL,
  80 # define REG_EFL        REG_EFL
  81   REG_CSGSFS,           /* Actually short cs, gs, fs, __pad0.  */
  82 # define REG_CSGSFS     REG_CSGSFS
  83   REG_ERR,
  84 # define REG_ERR        REG_ERR
  85   REG_TRAPNO,
  86 # define REG_TRAPNO     REG_TRAPNO
  87   REG_OLDMASK,
  88 # define REG_OLDMASK    REG_OLDMASK
  89   REG_CR2
  90 # define REG_CR2        REG_CR2
  91 };
  92 #endif
  93
  94 struct _libc_fpxreg
  95 {
  96   unsigned short int significand[4];
  97   unsigned short int exponent;
  98   unsigned short int padding[3];
  99 };
 100
 101 struct _libc_xmmreg
 102 {
 103   __uint32_t    element[4];
 104 };
 105
 106 struct _libc_fpstate
 107 {
 108   /* 64-bit FXSAVE format.  */
 109   __uint16_t            cwd;
 110   __uint16_t            swd;
 111   __uint16_t            ftw;
 112   __uint16_t            fop;
 113   __uint64_t            rip;
 114   __uint64_t            rdp;
 115   __uint32_t            mxcsr;
 116   __uint32_t            mxcr_mask;
 117   struct _libc_fpxreg   _st[8];
 118   struct _libc_xmmreg   _xmm[16];
 119   __uint32_t            padding[24];
 120 };
 121
 122 /* Structure to describe FPU registers.  */
 123 typedef struct _libc_fpstate *fpregset_t;
 124
 125 /* Context to describe whole processor state.  */
 126 typedef struct
 127   {
 128     gregset_t gregs;
 129     /* Note that fpregs is a pointer.  */
 130     fpregset_t fpregs;
 131     __extension__ unsigned long long __reserved1 [8];
 132 } mcontext_t;
 133
 134 /* Userlevel context.  */
 135 typedef struct ucontext
 136   {
 137     unsigned long int uc_flags;
 138     struct ucontext *uc_link;
 139     stack_t uc_stack;
 140     mcontext_t uc_mcontext;
 141     __sigset_t uc_sigmask;
 142     struct _libc_fpstate __fpregs_mem;
 143   } ucontext_t;
 144
 145 #else /* !__x86_64__ */
 146
 147 /* Type for general register.  */
 148 typedef int greg_t;
 149
 150 /* Number of general registers.  */
 151 #define NGREG   19
 152
 153 /* Container for all general registers.  */
 154 typedef greg_t gregset_t[NGREG];
 155
 156 #ifdef __USE_GNU
 157 /* Number of each register is the `gregset_t' array.  */
 158 enum
 159 {
 160   REG_GS = 0,
 161 # define REG_GS         REG_GS
 162   REG_FS,
 163 # define REG_FS         REG_FS
 164   REG_ES,
 165 # define REG_ES         REG_ES
 166   REG_DS,
 167 # define REG_DS         REG_DS
 168   REG_EDI,
 169 # define REG_EDI        REG_EDI
 170   REG_ESI,
 171 # define REG_ESI        REG_ESI
 172   REG_EBP,
 173 # define REG_EBP        REG_EBP
 174   REG_ESP,
 175 # define REG_ESP        REG_ESP
 176   REG_EBX,
 177 # define REG_EBX        REG_EBX
 178   REG_EDX,
 179 # define REG_EDX        REG_EDX
 180   REG_ECX,
 181 # define REG_ECX        REG_ECX
 182   REG_EAX,
 183 # define REG_EAX        REG_EAX
 184   REG_TRAPNO,
 185 # define REG_TRAPNO     REG_TRAPNO
 186   REG_ERR,
 187 # define REG_ERR        REG_ERR
 188   REG_EIP,
 189 # define REG_EIP        REG_EIP
 190   REG_CS,
 191 # define REG_CS         REG_CS
 192   REG_EFL,
 193 # define REG_EFL        REG_EFL
 194   REG_UESP,
 195 # define REG_UESP       REG_UESP
 196   REG_SS
 197 # define REG_SS REG_SS
 198 };
 199 #endif
 200
 201 /* Definitions taken from the kernel headers.  */
 202 struct _libc_fpreg
 203 {
 204   unsigned short int significand[4];
 205   unsigned short int exponent;
 206 };
 207
 208 struct _libc_fpstate
 209 {
 210   unsigned long int cw;
 211   unsigned long int sw;
 212   unsigned long int tag;
 213   unsigned long int ipoff;
 214   unsigned long int cssel;
 215   unsigned long int dataoff;
 216   unsigned long int datasel;
 217   struct _libc_fpreg _st[8];
 218   unsigned long int status;
 219 };
 220
 221 /* Structure to describe FPU registers.  */
 222 typedef struct _libc_fpstate *fpregset_t;
 223
 224 /* Context to describe whole processor state.  */
 225 typedef struct
 226   {
 227     gregset_t gregs;
 228     /* Due to Linux's history we have to use a pointer here.  The SysV/i386
 229        ABI requires a struct with the values.  */
 230     fpregset_t fpregs;
 231     unsigned long int oldmask;
 232     unsigned long int cr2;
 233   } mcontext_t;
 234
 235 /* Userlevel context.  */
 236 typedef struct ucontext
 237   {
 238     unsigned long int uc_flags;
 239     struct ucontext *uc_link;
 240     stack_t uc_stack;
 241     mcontext_t uc_mcontext;
 242     __sigset_t uc_sigmask;
 243     struct _libc_fpstate __fpregs_mem;
 244   } ucontext_t;
 245
 246 #endif /* !__x86_64__ */
 247
 248 #endif /* sys/ucontext.h */