sysdeps/unix/sysv/linux/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 #include <signal.h>
  25
  26 /* We need the signal context definitions even if they are not exposed
  27    by <signal.h>.  */
  28 #include <bits/sigcontext.h>
  29 #include <bits/sigstack.h>
  30
  31
  32 typedef int greg_t;
  33
  34 /* Number of general registers.  */
  35 #define NGREG   18
  36
  37 /* Container for all general registers.  */
  38 typedef greg_t gregset_t[NGREG];
  39
  40 /* Number of each register is the `gregset_t' array.  */
  41 enum
  42 {
  43   REG_R0 = 0,
  44 #define REG_R0  REG_R0
  45   REG_R1 = 1,
  46 #define REG_R1  REG_R1
  47   REG_R2 = 2,
  48 #define REG_R2  REG_R2
  49   REG_R3 = 3,
  50 #define REG_R3  REG_R3
  51   REG_R4 = 4,
  52 #define REG_R4  REG_R4
  53   REG_R5 = 5,
  54 #define REG_R5  REG_R5
  55   REG_R6 = 6,
  56 #define REG_R6  REG_R6
  57   REG_R7 = 7,
  58 #define REG_R7  REG_R7
  59   REG_R8 = 8,
  60 #define REG_R8  REG_R8
  61   REG_R9 = 9,
  62 #define REG_R9  REG_R9
  63   REG_R10 = 10,
  64 #define REG_R10 REG_R10
  65   REG_R11 = 11,
  66 #define REG_R11 REG_R11
  67   REG_R12 = 12,
  68 #define REG_R12 REG_R12
  69   REG_R13 = 13,
  70 #define REG_R13 REG_R13
  71   REG_R14 = 14,
  72 #define REG_R14 REG_R14
  73   REG_R15 = 15
  74 #define REG_R15 REG_R15
  75 };
  76
  77 struct _libc_fpstate
  78 {
  79   struct
  80   {
  81     unsigned int sign1:1;
  82     unsigned int unused:15;
  83     unsigned int sign2:1;
  84     unsigned int exponent:14;
  85     unsigned int j:1;
  86     unsigned int mantissa1:31;
  87     unsigned int mantissa0:32;
  88   } fpregs[8];
  89   unsigned int fpsr:32;
  90   unsigned int fpcr:32;
  91   unsigned char ftype[8];
  92   unsigned int init_flag;
  93 };
  94 /* Structure to describe FPU registers.  */
  95 typedef struct _libc_fpstate fpregset_t;
  96
  97 /* Context to describe whole processor state.  This only describes
  98    the core registers; coprocessor registers get saved elsewhere
  99    (e.g. in uc_regspace, or somewhere unspecified on the stack
 100    during non-RT signal handlers).  */
 101 typedef struct sigcontext mcontext_t;
 102
 103 /* Userlevel context.  */
 104 typedef struct ucontext
 105   {
 106     unsigned long uc_flags;
 107     struct ucontext *uc_link;
 108     stack_t uc_stack;
 109     mcontext_t uc_mcontext;
 110     __sigset_t uc_sigmask;
 111     unsigned long uc_regspace[128] __attribute__((__aligned__(8)));
 112   } ucontext_t;
 113
 114 #endif /* sys/ucontext.h */