1 /* Copyright (C) 1997-2013 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 /* System V/i386 ABI compliant context switching support. */
20 #ifndef _SYS_UCONTEXT_H
21 #define _SYS_UCONTEXT_H 1
26 /* Type for general register. */
29 /* Number of general registers. */
32 /* Container for all general registers. */
33 typedef greg_t gregset_t
[NGREG
];
35 /* Number of each register is the `gregset_t' array. */
47 #define REG_EDI REG_EDI
49 #define REG_ESI REG_ESI
51 #define REG_EBP REG_EBP
53 #define REG_ESP REG_ESP
55 #define REG_EBX REG_EBX
57 #define REG_EDX REG_EDX
59 #define REG_ECX REG_ECX
61 #define REG_EAX REG_EAX
63 #define REG_TRAPNO REG_TRAPNO
65 #define REG_ERR REG_ERR
67 #define REG_EIP REG_EIP
71 #define REG_EFL REG_EFL
73 #define REG_UESP REG_UESP
78 /* Structure to describe FPU registers. */
79 typedef struct fpregset
101 /* Context to describe whole processor state. */
108 /* Userlevel context. */
109 typedef struct ucontext
111 unsigned long int uc_flags
;
112 struct ucontext
*uc_link
;
113 __sigset_t uc_sigmask
;
115 mcontext_t uc_mcontext
;
116 long int uc_filler
[5];
119 #endif /* sys/ucontext.h */