1 /* Copyright (C) 1998, 1999, 2001, 2006 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
25 #include <sys/procfs.h>
27 /* We need the signal context definitions even if they are not used
28 included in <signal.h>. */
29 #include <bits/sigcontext.h>
33 /* Number of general registers. */
36 /* Container for all general registers. */
37 typedef elf_gregset_t gregset_t;
39 /* Number of each register is the `gregset_t' array. */
76 /* Structure to describe FPU registers. */
77 typedef elf_fpregset_t fpregset_t;
79 /* Context to describe whole processor state. This only describes
80 the core registers; coprocessor registers get saved elsewhere
81 (e.g. in uc_regspace, or somewhere unspecified on the stack
82 during non-RT signal handlers). */
83 typedef struct sigcontext mcontext_t;
85 /* Userlevel context. */
86 typedef struct ucontext
88 unsigned long uc_flags;
89 struct ucontext *uc_link;
91 mcontext_t uc_mcontext;
92 __sigset_t uc_sigmask;
93 unsigned long uc_regspace[128] __attribute__((__aligned__(8)));
96 #endif /* sys/ucontext.h */