sysdeps/arm/sys/ucontext.h

   1 /* Copyright (C) 1998-2018 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/types/stack_t.h>
  27
  28
  29 typedef int greg_t;
  30
  31 /* Number of general registers.  */
  32 #define __NGREG 16
  33 #ifdef __USE_MISC
  34 # define NGREG  __NGREG
  35 #endif
  36
  37 /* Container for all general registers.  */
  38 typedef greg_t gregset_t[__NGREG];
  39
  40 #ifdef __USE_MISC
  41 /* Number of each register is the `gregset_t' array.  */
  42 enum
  43 {
  44   R0 = 0,
  45 # define R0     R0
  46   R1 = 1,
  47 # define R1     R1
  48   R2 = 2,
  49 # define R2     R2
  50   R3 = 3,
  51 # define R3     R3
  52   R4 = 4,
  53 # define R4     R4
  54   R5 = 5,
  55 # define R5     R5
  56   R6 = 6,
  57 # define R6     R6
  58   R7 = 7,
  59 # define R7     R7
  60   R8 = 8,
  61 # define R8     R8
  62   R9 = 9,
  63 # define R9     R9
  64   R10 = 10,
  65 # define R10    R10
  66   R11 = 11,
  67 # define R11    R11
  68   R12 = 12,
  69 # define R12    R12
  70   R13 = 13,
  71 # define R13    R13
  72   R14 = 14,
  73 # define R14    R14
  74   R15 = 15,
  75 # define R15    R15
  76 };
  77 #endif
  78
  79 #ifdef __USE_MISC
  80 # define __ctx(fld) fld
  81 #else
  82 # define __ctx(fld) __ ## fld
  83 #endif
  84
  85 /* Structure to describe FPU registers.  */
  86 typedef struct
  87   {
  88   } fpregset_t;
  89
  90 /* Context to describe whole processor state.  */
  91 typedef struct
  92   {
  93     gregset_t __ctx(gregs);
  94     fpregset_t __ctx(fpregs);
  95   } mcontext_t;
  96
  97 /* Userlevel context.  */
  98 typedef struct ucontext_t
  99   {
 100     unsigned long int __ctx(uc_flags);
 101     struct ucontext_t *uc_link;
 102     sigset_t uc_sigmask;
 103     stack_t uc_stack;
 104     mcontext_t uc_mcontext;
 105     long int __glibc_reserved1[5];
 106   } ucontext_t;
 107
 108 #undef __ctx
 109
 110 #endif /* sys/ucontext.h */