1 /* Copyright (C) 1998-2013 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/ARM ABI compliant context switching support. */
20 #ifndef _SYS_UCONTEXT_H
21 #define _SYS_UCONTEXT_H 1
26 /* We need the signal context definitions even if they are not used
27 included in <signal.h>. */
28 #include <bits/sigcontext.h>
32 /* Number of general registers. */
35 /* Container for all general registers. */
36 typedef greg_t gregset_t[NGREG];
38 /* Number of each register is the `gregset_t' array. */
62 #define REG_R10 REG_R10
64 #define REG_R11 REG_R11
66 #define REG_R12 REG_R12
68 #define REG_R13 REG_R13
70 #define REG_R14 REG_R14
72 #define REG_R15 REG_R15
80 unsigned int unused:15;
82 unsigned int exponent:14;
84 unsigned int mantissa1:31;
85 unsigned int mantissa0:32;
89 unsigned char ftype[8];
90 unsigned int init_flag;
92 /* Structure to describe FPU registers. */
93 typedef struct _libc_fpstate fpregset_t;
95 /* Context to describe whole processor state. This only describes
96 the core registers; coprocessor registers get saved elsewhere
97 (e.g. in uc_regspace, or somewhere unspecified on the stack
98 during non-RT signal handlers). */
99 typedef struct sigcontext mcontext_t;
101 /* Userlevel context. */
102 typedef struct ucontext
104 unsigned long uc_flags;
105 struct ucontext *uc_link;
107 mcontext_t uc_mcontext;
108 __sigset_t uc_sigmask;
109 unsigned long uc_regspace[128] __attribute__((__aligned__(8)));
112 #endif /* sys/ucontext.h */