1/* Copyright (C) 1998, 1999, 2001, 2006 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/* System V/ARM ABI compliant context switching support. */ 20 21#ifndef _SYS_UCONTEXT_H 22#define _SYS_UCONTEXT_H 1 23 24#include <features.h> 25#include <signal.h> 26#include <sys/procfs.h> 27 28/* We need the signal context definitions even if they are not used 29 included in <signal.h>. */ 30#include <bits/sigcontext.h> 31 32typedef int greg_t; 33 34/* Number of general registers. */ 35#define NGREG 18 36 37/* Container for all general registers. */ 38typedef elf_gregset_t gregset_t; 39 40/* Number of each register is the `gregset_t' array. */ 41enum 42{ 43 R0 = 0, 44#define R0 R0 45 R1 = 1, 46#define R1 R1 47 R2 = 2, 48#define R2 R2 49 R3 = 3, 50#define R3 R3 51 R4 = 4, 52#define R4 R4 53 R5 = 5, 54#define R5 R5 55 R6 = 6, 56#define R6 R6 57 R7 = 7, 58#define R7 R7 59 R8 = 8, 60#define R8 R8 61 R9 = 9, 62#define R9 R9 63 R10 = 10, 64#define R10 R10 65 R11 = 11, 66#define R11 R11 67 R12 = 12, 68#define R12 R12 69 R13 = 13, 70#define R13 R13 71 R14 = 14, 72#define R14 R14 73 R15 = 15 74#define R15 R15 75}; 76 77/* Structure to describe FPU registers. */ 78typedef elf_fpregset_t fpregset_t; 79 80/* Context to describe whole processor state. This only describes 81 the core registers; coprocessor registers get saved elsewhere 82 (e.g. in uc_regspace, or somewhere unspecified on the stack 83 during non-RT signal handlers). */ 84typedef struct sigcontext mcontext_t; 85 86/* Userlevel context. */ 87typedef struct ucontext 88 { 89 unsigned long uc_flags; 90 struct ucontext *uc_link; 91 stack_t uc_stack; 92 mcontext_t uc_mcontext; 93 __sigset_t uc_sigmask; 94 unsigned long uc_regspace[128] __attribute__((__aligned__(8))); 95 } ucontext_t; 96 97#endif /* sys/ucontext.h */ 98