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 #ifdef __USE_MISC
  35 # define NGREG  __NGREG
  36 #endif
  37
  38 /* Container for all general registers.  */
  39 typedef greg_t gregset_t[__NGREG];
  40
  41 #ifdef __USE_MISC
  42 /* Number of each register is the `gregset_t' array.  */
  43 enum
  44 {
  45   R0 = 0,
  46 # define R0     R0
  47   R1 = 1,
  48 # define R1     R1
  49   R2 = 2,
  50 # define R2     R2
  51   R3 = 3,
  52 # define R3     R3
  53   R4 = 4,
  54 # define R4     R4
  55   R5 = 5,
  56 # define R5     R5
  57   R6 = 6,
  58 # define R6     R6
  59   R7 = 7,
  60 # define R7     R7
  61   R8 = 8,
  62 # define R8     R8
  63   R9 = 9,
  64 # define R9     R9
  65   R10 = 10,
  66 # define R10    R10
  67   R11 = 11,
  68 # define R11    R11
  69   R12 = 12,
  70 # define R12    R12
  71   R13 = 13,
  72 # define R13    R13
  73   R14 = 14,
  74 # define R14    R14
  75   R15 = 15,
  76 # define R15    R15
  77 };
  78 #endif
  79
  80 #ifdef __USE_MISC
  81 # define __ctx(fld) fld
  82 #else
  83 # define __ctx(fld) __ ## fld
  84 #endif
  85
  86 /* Structure to describe FPU registers.  */
  87 typedef struct fpregset
  88   {
  89   } fpregset_t;
  90
  91 /* Context to describe whole processor state.  */
  92 typedef struct
  93   {
  94     gregset_t __ctx(gregs);
  95     fpregset_t __ctx(fpregs);
  96   } mcontext_t;
  97
  98 #undef __ctx
  99
 100 /* Userlevel context.  */
 101 typedef struct ucontext_t
 102   {
 103     unsigned long int uc_flags;
 104     struct ucontext_t *uc_link;
 105     sigset_t uc_sigmask;
 106     stack_t uc_stack;
 107     mcontext_t uc_mcontext;
 108     long int uc_filler[5];
 109   } ucontext_t;
 110
 111 #endif /* sys/ucontext.h */