sysdeps/unix/sysv/linux/x86_64/sys/ucontext.h

   1 /* Copyright (C) 2001, 2002 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 #include <bits/wordsize.h>
  24
  25 /* We need the signal context definitions even if they are not used
  26    included in <signal.h>.  */
  27 #include <bits/sigcontext.h>
  28
  29 #if __WORDSIZE == 64
  30
  31 /* Type for general register.  */
  32 typedef long int greg_t;
  33
  34 /* Number of general registers.  */
  35 #define NGREG   23
  36
  37 /* Container for all general registers.  */
  38 typedef greg_t gregset_t[NGREG];
  39
  40 #ifdef __USE_GNU
  41 /* Number of each register in the `gregset_t' array.  */
  42 enum
  43 {
  44   REG_R8 = 0,
  45 # define REG_R8         REG_R8
  46   REG_R9,
  47 # define REG_R9         REG_R9
  48   REG_R10,
  49 # define REG_R10        REG_R10
  50   REG_R11,
  51 # define REG_R11        REG_R11
  52   REG_R12,
  53 # define REG_R12        REG_R12
  54   REG_R13,
  55 # define REG_R13        REG_R13
  56   REG_R14,
  57 # define REG_R14        REG_R14
  58   REG_R15,
  59 # define REG_R15        REG_R15
  60   REG_RDI,
  61 # define REG_RDI        REG_RDI
  62   REG_RSI,
  63 # define REG_RSI        REG_RSI
  64   REG_RBP,
  65 # define REG_RBP        REG_RBP
  66   REG_RBX,
  67 # define REG_RBX        REG_RBX
  68   REG_RDX,
  69 # define REG_RDX        REG_RDX
  70   REG_RAX,
  71 # define REG_RAX        REG_RAX
  72   REG_RCX,
  73 # define REG_RCX        REG_RCX
  74   REG_RSP,
  75 # define REG_RSP        REG_RSP
  76   REG_RIP,
  77 # define REG_RIP        REG_RIP
  78   REG_EFL,
  79 # define REG_EFL        REG_EFL
  80   REG_CSGSFS,           /* Actually short cs, gs, fs, __pad0.  */
  81 # define REG_CSGSFS     REG_CSGSFS
  82   REG_ERR,
  83 # define REG_ERR        REG_ERR
  84   REG_TRAPNO,
  85 # define REG_TRAPNO     REG_TRAPNO
  86   REG_OLDMASK,
  87 # define REG_OLDMASK    REG_OLDMASK
  88   REG_CR2
  89 # define REG_CR2        REG_CR2
  90 };
  91 #endif
  92
  93 struct _libc_fpxreg
  94 {
  95   unsigned short int significand[4];
  96   unsigned short int exponent;
  97   unsigned short int padding[3];
  98 };
  99
 100 struct _libc_xmmreg
 101 {
 102   __uint32_t    element[4];
 103 };
 104
 105 struct _libc_fpstate
 106 {
 107   /* 64-bit FXSAVE format.  */
 108   __uint16_t            cwd;
 109   __uint16_t            swd;
 110   __uint16_t            ftw;
 111   __uint16_t            fop;
 112   __uint64_t            rip;
 113   __uint64_t            rdp;
 114   __uint32_t            mxcsr;
 115   __uint32_t            mxcr_mask;
 116   struct _libc_fpxreg   _st[8];
 117   struct _libc_xmmreg   _xmm[16];
 118   __uint32_t            padding[24];
 119 };
 120
 121 /* Structure to describe FPU registers.  */
 122 typedef struct _libc_fpstate *fpregset_t;
 123
 124 /* Context to describe whole processor state.  */
 125 typedef struct
 126   {
 127     gregset_t gregs;
 128     /* Note that fpregs is a pointer.  */
 129     fpregset_t fpregs;
 130     unsigned long __reserved1 [8];
 131 } mcontext_t;
 132
 133 /* Userlevel context.  */
 134 typedef struct ucontext
 135   {
 136     unsigned long int uc_flags;
 137     struct ucontext *uc_link;
 138     stack_t uc_stack;
 139     mcontext_t uc_mcontext;
 140     __sigset_t uc_sigmask;
 141     struct _libc_fpstate __fpregs_mem;
 142   } ucontext_t;
 143
 144 #else /* __WORDSIZE == 32 */
 145
 146 /* Type for general register.  */
 147 typedef int greg_t;
 148
 149 /* Number of general registers.  */
 150 #define NGREG   19
 151
 152 /* Container for all general registers.  */
 153 typedef greg_t gregset_t[NGREG];
 154
 155 #ifdef __USE_GNU
 156 /* Number of each register is the `gregset_t' array.  */
 157 enum
 158 {
 159   REG_GS = 0,
 160 # define REG_GS         REG_GS
 161   REG_FS,
 162 # define REG_FS         REG_FS
 163   REG_ES,
 164 # define REG_ES         REG_ES
 165   REG_DS,
 166 # define REG_DS         REG_DS
 167   REG_EDI,
 168 # define REG_EDI        REG_EDI
 169   REG_ESI,
 170 # define REG_ESI        REG_ESI
 171   REG_EBP,
 172 # define REG_EBP        REG_EBP
 173   REG_ESP,
 174 # define REG_ESP        REG_ESP
 175   REG_EBX,
 176 # define REG_EBX        REG_EBX
 177   REG_EDX,
 178 # define REG_EDX        REG_EDX
 179   REG_ECX,
 180 # define REG_ECX        REG_ECX
 181   REG_EAX,
 182 # define REG_EAX        REG_EAX
 183   REG_TRAPNO,
 184 # define REG_TRAPNO     REG_TRAPNO
 185   REG_ERR,
 186 # define REG_ERR        REG_ERR
 187   REG_EIP,
 188 # define REG_EIP        REG_EIP
 189   REG_CS,
 190 # define REG_CS         REG_CS
 191   REG_EFL,
 192 # define REG_EFL        REG_EFL
 193   REG_UESP,
 194 # define REG_UESP       REG_UESP
 195   REG_SS
 196 # define REG_SS REG_SS
 197 };
 198 #endif
 199
 200 /* Definitions taken from the kernel headers.  */
 201 struct _libc_fpreg
 202 {
 203   unsigned short int significand[4];
 204   unsigned short int exponent;
 205 };
 206
 207 struct _libc_fpstate
 208 {
 209   unsigned long int cw;
 210   unsigned long int sw;
 211   unsigned long int tag;
 212   unsigned long int ipoff;
 213   unsigned long int cssel;
 214   unsigned long int dataoff;
 215   unsigned long int datasel;
 216   struct _libc_fpreg _st[8];
 217   unsigned long int status;
 218 };
 219
 220 /* Structure to describe FPU registers.  */
 221 typedef struct _libc_fpstate *fpregset_t;
 222
 223 /* Context to describe whole processor state.  */
 224 typedef struct
 225   {
 226     gregset_t gregs;
 227     /* Due to Linux's history we have to use a pointer here.  The SysV/i386
 228        ABI requires a struct with the values.  */
 229     fpregset_t fpregs;
 230     unsigned long int oldmask;
 231     unsigned long int cr2;
 232   } mcontext_t;
 233
 234 /* Userlevel context.  */
 235 typedef struct ucontext
 236   {
 237     unsigned long int uc_flags;
 238     struct ucontext *uc_link;
 239     stack_t uc_stack;
 240     mcontext_t uc_mcontext;
 241     __sigset_t uc_sigmask;
 242     struct _libc_fpstate __fpregs_mem;
 243   } ucontext_t;
 244
 245 #endif /* __WORDSIZE == 32 */
 246
 247 #endif /* sys/ucontext.h */