1 /* Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
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/>. */
18 #ifndef _SYS_UCONTEXT_H
19 #define _SYS_UCONTEXT_H 1
24 /* We need the signal context definitions even if they are not used
25 included in <signal.h>. */
26 #include <bits/sigcontext.h>
29 /* Type for general register. */
32 /* Number of general registers. */
35 /* Container for all general registers. */
36 typedef greg_t gregset_t[NGREG];
39 /* Number of each register is the `gregset_t' array. */
43 # define REG_GS REG_GS
45 # define REG_FS REG_FS
47 # define REG_ES REG_ES
49 # define REG_DS REG_DS
51 # define REG_EDI REG_EDI
53 # define REG_ESI REG_ESI
55 # define REG_EBP REG_EBP
57 # define REG_ESP REG_ESP
59 # define REG_EBX REG_EBX
61 # define REG_EDX REG_EDX
63 # define REG_ECX REG_ECX
65 # define REG_EAX REG_EAX
67 # define REG_TRAPNO REG_TRAPNO
69 # define REG_ERR REG_ERR
71 # define REG_EIP REG_EIP
73 # define REG_CS REG_CS
75 # define REG_EFL REG_EFL
77 # define REG_UESP REG_UESP
79 # define REG_SS REG_SS
83 /* Definitions taken from the kernel headers. */
86 unsigned short int significand[4];
87 unsigned short int exponent;
94 unsigned long int tag;
95 unsigned long int ipoff;
96 unsigned long int cssel;
97 unsigned long int dataoff;
98 unsigned long int datasel;
99 struct _libc_fpreg _st[8];
100 unsigned long int status;
103 /* Structure to describe FPU registers. */
104 typedef struct _libc_fpstate *fpregset_t;
106 /* Context to describe whole processor state. */
110 /* Due to Linux's history we have to use a pointer here. The SysV/i386
111 ABI requires a struct with the values. */
113 unsigned long int oldmask;
114 unsigned long int cr2;
117 /* Userlevel context. */
118 typedef struct ucontext
120 unsigned long int uc_flags;
121 struct ucontext *uc_link;
123 mcontext_t uc_mcontext;
124 __sigset_t uc_sigmask;
125 struct _libc_fpstate __fpregs_mem;
128 #endif /* sys/ucontext.h */