1 /* Copyright (C) 1997, 1998, 1999, 2000 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, write to the Free 16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 17 02111-1307 USA. */ 18 19 #ifndef _SYS_UCONTEXT_H 20 #define _SYS_UCONTEXT_H 1 21 22 #include <features.h> 23 #include <signal.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 30 /* Type for general register. */ 31 typedef int greg_t; 32 33 /* Number of general registers. */ 34 #define NGREG 19 35 36 /* Container for all general registers. */ 37 typedef greg_t gregset_t[NGREG]; 38 39 #ifdef __USE_GNU 40 /* Number of each register is the `gregset_t' array. */ 41 enum 42 { 43 REG_GS = 0, 44 # define REG_GS REG_GS 45 REG_FS, 46 # define REG_FS REG_FS 47 REG_ES, 48 # define REG_ES REG_ES 49 REG_DS, 50 # define REG_DS REG_DS 51 REG_EDI, 52 # define REG_EDI REG_EDI 53 REG_ESI, 54 # define REG_ESI REG_ESI 55 REG_EBP, 56 # define REG_EBP REG_EBP 57 REG_ESP, 58 # define REG_ESP REG_ESP 59 REG_EBX, 60 # define REG_EBX REG_EBX 61 REG_EDX, 62 # define REG_EDX REG_EDX 63 REG_ECX, 64 # define REG_ECX REG_ECX 65 REG_EAX, 66 # define REG_EAX REG_EAX 67 REG_TRAPNO, 68 # define REG_TRAPNO REG_TRAPNO 69 REG_ERR, 70 # define REG_ERR REG_ERR 71 REG_EIP, 72 # define REG_EIP REG_EIP 73 REG_CS, 74 # define REG_CS REG_CS 75 REG_EFL, 76 # define REG_EFL REG_EFL 77 REG_UESP, 78 # define REG_UESP REG_UESP 79 REG_SS 80 # define REG_SS REG_SS 81 }; 82 #endif 83 84 /* Definitions taken from the kernel headers. */ 85 struct _libc_fpreg 86 { 87 unsigned short int significand[4]; 88 unsigned short int exponent; 89 }; 90 91 struct _libc_fpstate 92 { 93 unsigned long int cw; 94 unsigned long int sw; 95 unsigned long int tag; 96 unsigned long int ipoff; 97 unsigned long int cssel; 98 unsigned long int dataoff; 99 unsigned long int datasel; 100 struct _libc_fpreg _st[8]; 101 unsigned long int status; 102 }; 103 104 /* Structure to describe FPU registers. */ 105 typedef struct _libc_fpstate *fpregset_t; 106 107 /* Context to describe whole processor state. */ 108 typedef struct 109 { 110 gregset_t gregs; 111 /* Due to Linux's history we have to use a pointer here. The SysV/i386 112 ABI requires a struct with the values. */ 113 fpregset_t fpregs; 114 unsigned long int oldmask; 115 unsigned long int cr2; 116 } mcontext_t; 117 118 /* Userlevel context. */ 119 typedef struct ucontext 120 { 121 unsigned long int uc_flags; 122 struct ucontext *uc_link; 123 stack_t uc_stack; 124 mcontext_t uc_mcontext; 125 __sigset_t uc_sigmask; 126 struct _libc_fpstate __fpregs_mem; 127 } ucontext_t; 128 129 #endif /* sys/ucontext.h */ 130
