ports/sysdeps/arm/sys/ucontext.h

   1 /* Copyright (C) 1998-2014 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, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 /* System V/ARM 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
  26 typedef int greg_t;
  27
  28 /* Number of general registers.  */
  29 #define NGREG   16
  30
  31 /* Container for all general registers.  */
  32 typedef greg_t gregset_t[NGREG];
  33
  34 /* Number of each register is the `gregset_t' array.  */
  35 enum
  36 {
  37   R0 = 0,
  38 #define R0      R0
  39   R1 = 1,
  40 #define R1      R1
  41   R2 = 2,
  42 #define R2      R2
  43   R3 = 3,
  44 #define R3      R3
  45   R4 = 4,
  46 #define R4      R4
  47   R5 = 5,
  48 #define R5      R5
  49   R6 = 6,
  50 #define R6      R6
  51   R7 = 7,
  52 #define R7      R7
  53   R8 = 8,
  54 #define R8      R8
  55   R9 = 9,
  56 #define R9      R9
  57   R10 = 10,
  58 #define R10     R10
  59   R11 = 11,
  60 #define R11     R11
  61   R12 = 12,
  62 #define R12     R12
  63   R13 = 13,
  64 #define R13     R13
  65   R14 = 14,
  66 #define R14     R14
  67   R15 = 15,
  68 #define R15     R15
  69 };
  70
  71 /* Structure to describe FPU registers.  */
  72 typedef struct fpregset
  73   {
  74   } fpregset_t;
  75
  76 /* Context to describe whole processor state.  */
  77 typedef struct
  78   {
  79     gregset_t gregs;
  80     fpregset_t fpregs;
  81   } mcontext_t;
  82
  83 /* Userlevel context.  */
  84 typedef struct ucontext
  85   {
  86     unsigned long int uc_flags;
  87     struct ucontext *uc_link;
  88     __sigset_t uc_sigmask;
  89     stack_t uc_stack;
  90     mcontext_t uc_mcontext;
  91     long int uc_filler[5];
  92   } ucontext_t;
  93
  94 #endif /* sys/ucontext.h */