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; see the file COPYING.LIB. If 16 not, see <http://www.gnu.org/licenses/>. */ 17 18 /* Meta ABI compliant context switching support. */ 19 20 #ifndef _SYS_UCONTEXT_H 21 #define _SYS_UCONTEXT_H 1 22 23 #include <features.h> 24 #include <signal.h> 25 #include <sys/procfs.h> 26 27 /* We need the signal context definitions even if they are not used 28 included in <signal.h>. */ 29 #include <bits/sigcontext.h> 30 31 typedef int greg_t; 32 33 /* Number of general registers. */ 34 #define NGREG 18 35 36 /* Container for all general registers. */ 37 typedef elf_gregset_t gregset_t; 38 39 /* Number of each register is the `gregset_t' array. */ 40 enum 41 { 42 R0 = 0, 43 #define R0 R0 44 R1 = 1, 45 #define R1 R1 46 R2 = 2, 47 #define R2 R2 48 R3 = 3, 49 #define R3 R3 50 R4 = 4, 51 #define R4 R4 52 R5 = 5, 53 #define R5 R5 54 R6 = 6, 55 #define R6 R6 56 R7 = 7, 57 #define R7 R7 58 R8 = 8, 59 #define R8 R8 60 R9 = 9, 61 #define R9 R9 62 R10 = 10, 63 #define R10 R10 64 R11 = 11, 65 #define R11 R11 66 R12 = 12, 67 #define R12 R12 68 R13 = 13, 69 #define R13 R13 70 R14 = 14, 71 #define R14 R14 72 R15 = 15 73 #define R15 R15 74 }; 75 76 /* Structure to describe FPU registers. */ 77 typedef elf_fpregset_t fpregset_t; 78 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; 84 85 /* Userlevel context. */ 86 typedef struct ucontext 87 { 88 unsigned long uc_flags; 89 struct ucontext *uc_link; 90 stack_t uc_stack; 91 mcontext_t uc_mcontext; 92 __sigset_t uc_sigmask; 93 } ucontext_t; 94 95 #endif /* sys/ucontext.h */ 96