sysdeps/arm/sys/ucontext.h

   1 /* Copyright (C) 1998, 1999 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
  27 typedef int greg_t;
  28
  29 /* Number of general registers.  */
  30 #define NGREG   16
  31
  32 /* Container for all general registers.  */
  33 typedef greg_t gregset_t[NGREG];
  34
  35 /* Number of each register is the `gregset_t' array.  */
  36 enum
  37 {
  38   R0 = 0,
  39 #define R0      R0
  40   R1 = 1,
  41 #define R1      R1
  42   R2 = 2,
  43 #define R2      R2
  44   R3 = 3,
  45 #define R3      R3
  46   R4 = 4,
  47 #define R4      R4
  48   R5 = 5,
  49 #define R5      R5
  50   R6 = 6,
  51 #define R6      R6
  52   R7 = 7,
  53 #define R7      R7
  54   R8 = 8,
  55 #define R8      R8
  56   R9 = 9,
  57 #define R9      R9
  58   R10 = 10,
  59 #define R10     R10
  60   R11 = 11,
  61 #define R11     R11
  62   R12 = 12,
  63 #define R12     R12
  64   R13 = 13,
  65 #define R13     R13
  66   R14 = 14,
  67 #define R14     R14
  68   R15 = 15,
  69 #define R15     R15
  70 };
  71
  72 /* Structure to describe FPU registers.  */
  73 typedef struct fpregset
  74   {
  75   } fpregset_t;
  76
  77 /* Context to describe whole processor state.  */
  78 typedef struct
  79   {
  80     gregset_t gregs;
  81     fpregset_t fpregs;
  82   } mcontext_t;
  83
  84 /* Userlevel context.  */
  85 typedef struct ucontext
  86   {
  87     unsigned long int uc_flags;
  88     struct ucontext *uc_link;
  89     __sigset_t uc_sigmask;
  90     stack_t uc_stack;
  91     mcontext_t uc_mcontext;
  92     long int uc_filler[5];
  93   } ucontext_t;
  94
  95 #endif /* sys/ucontext.h */