sysdeps/i386/sys/ucontext.h

   1 /* Copyright (C) 1997-2014 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 /* System V/i386 ABI compliant context switching support.  */
  19
  20 #ifndef _SYS_UCONTEXT_H
  21 #define _SYS_UCONTEXT_H 1
  22
  23 #include <features.h>
  24 #include <signal.h>
  25
  26 /* Type for general register.  */
  27 typedef int greg_t;
  28
  29 /* Number of general registers.  */
  30 #define NGREG   19
  31
  32 /* Container for all general registers.  */
  33 typedef greg_t gregset_t[NGREG];
  34
  35 /* Number of each register is the `gregset_t' array.  */
  36 enum
  37 {
  38   REG_GS = 0,
  39 #define REG_GS  REG_GS
  40   REG_FS,
  41 #define REG_FS  REG_FS
  42   REG_ES,
  43 #define REG_ES  REG_ES
  44   REG_DS,
  45 #define REG_DS  REG_DS
  46   REG_EDI,
  47 #define REG_EDI REG_EDI
  48   REG_ESI,
  49 #define REG_ESI REG_ESI
  50   REG_EBP,
  51 #define REG_EBP REG_EBP
  52   REG_ESP,
  53 #define REG_ESP REG_ESP
  54   REG_EBX,
  55 #define REG_EBX REG_EBX
  56   REG_EDX,
  57 #define REG_EDX REG_EDX
  58   REG_ECX,
  59 #define REG_ECX REG_ECX
  60   REG_EAX,
  61 #define REG_EAX REG_EAX
  62   REG_TRAPNO,
  63 #define REG_TRAPNO      REG_TRAPNO
  64   REG_ERR,
  65 #define REG_ERR REG_ERR
  66   REG_EIP,
  67 #define REG_EIP REG_EIP
  68   REG_CS,
  69 #define REG_CS  REG_CS
  70   REG_EFL,
  71 #define REG_EFL REG_EFL
  72   REG_UESP,
  73 #define REG_UESP        REG_UESP
  74   REG_SS
  75 #define REG_SS  REG_SS
  76 };
  77
  78 /* Structure to describe FPU registers.  */
  79 typedef struct fpregset
  80   {
  81     union
  82       {
  83         struct fpchip_state
  84           {
  85             int state[27];
  86             int status;
  87           } fpchip_state;
  88
  89         struct fp_emul_space
  90           {
  91             char fp_emul[246];
  92             char fp_epad[2];
  93           } fp_emul_space;
  94
  95         int f_fpregs[62];
  96       } fp_reg_set;
  97
  98     long int f_wregs[33];
  99   } fpregset_t;
 100
 101 /* Context to describe whole processor state.  */
 102 typedef struct
 103   {
 104     gregset_t gregs;
 105     fpregset_t fpregs;
 106   } mcontext_t;
 107
 108 /* Userlevel context.  */
 109 typedef struct ucontext
 110   {
 111     unsigned long int uc_flags;
 112     struct ucontext *uc_link;
 113     __sigset_t uc_sigmask;
 114     stack_t uc_stack;
 115     mcontext_t uc_mcontext;
 116     long int uc_filler[5];
 117   } ucontext_t;
 118
 119 #endif /* sys/ucontext.h */