sysdeps/arm/sys/ucontext.h

   1 /* Copyright (C) 1998-2017 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
  25 #include <bits/types/sigset_t.h>
  26 #include <bits/sigcontext.h>
  27 #include <bits/types/stack_t.h>
  28
  29
  30 typedef int greg_t;
  31
  32 /* Number of general registers.  */
  33 #define NGREG   16
  34
  35 /* Container for all general registers.  */
  36 typedef greg_t gregset_t[NGREG];
  37
  38 #ifdef __USE_MISC
  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 #endif
  76
  77 /* Structure to describe FPU registers.  */
  78 typedef struct fpregset
  79   {
  80   } fpregset_t;
  81
  82 /* Context to describe whole processor state.  */
  83 typedef struct
  84   {
  85     gregset_t gregs;
  86     fpregset_t fpregs;
  87   } mcontext_t;
  88
  89 /* Userlevel context.  */
  90 typedef struct ucontext
  91   {
  92     unsigned long int uc_flags;
  93     struct ucontext *uc_link;
  94     sigset_t uc_sigmask;
  95     stack_t uc_stack;
  96     mcontext_t uc_mcontext;
  97     long int uc_filler[5];
  98   } ucontext_t;
  99
 100 #endif /* sys/ucontext.h */