sysdeps/unix/sysv/linux/arm/sys/ucontext.h

   1 /* Copyright (C) 1998-2019 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 #ifdef __USE_MISC
  30 # define __ctx(fld) fld
  31 #else
  32 # define __ctx(fld) __ ## fld
  33 #endif
  34
  35 #ifdef __USE_MISC
  36 typedef int greg_t;
  37
  38 /* Number of general registers.  */
  39 # define NGREG  18
  40
  41 /* Container for all general registers.  */
  42 typedef greg_t gregset_t[NGREG];
  43
  44 /* Number of each register is the `gregset_t' array.  */
  45 enum
  46 {
  47   REG_R0 = 0,
  48 # define REG_R0 REG_R0
  49   REG_R1 = 1,
  50 # define REG_R1 REG_R1
  51   REG_R2 = 2,
  52 # define REG_R2 REG_R2
  53   REG_R3 = 3,
  54 # define REG_R3 REG_R3
  55   REG_R4 = 4,
  56 # define REG_R4 REG_R4
  57   REG_R5 = 5,
  58 # define REG_R5 REG_R5
  59   REG_R6 = 6,
  60 # define REG_R6 REG_R6
  61   REG_R7 = 7,
  62 # define REG_R7 REG_R7
  63   REG_R8 = 8,
  64 # define REG_R8 REG_R8
  65   REG_R9 = 9,
  66 # define REG_R9 REG_R9
  67   REG_R10 = 10,
  68 # define REG_R10        REG_R10
  69   REG_R11 = 11,
  70 # define REG_R11        REG_R11
  71   REG_R12 = 12,
  72 # define REG_R12        REG_R12
  73   REG_R13 = 13,
  74 # define REG_R13        REG_R13
  75   REG_R14 = 14,
  76 # define REG_R14        REG_R14
  77   REG_R15 = 15
  78 # define REG_R15        REG_R15
  79 };
  80
  81 struct _libc_fpstate
  82 {
  83   struct
  84   {
  85     unsigned int sign1:1;
  86     unsigned int unused:15;
  87     unsigned int sign2:1;
  88     unsigned int exponent:14;
  89     unsigned int j:1;
  90     unsigned int mantissa1:31;
  91     unsigned int mantissa0:32;
  92   } fpregs[8];
  93   unsigned int fpsr:32;
  94   unsigned int fpcr:32;
  95   unsigned char ftype[8];
  96   unsigned int init_flag;
  97 };
  98 /* Structure to describe FPU registers.  */
  99 typedef struct _libc_fpstate fpregset_t;
 100 #endif
 101
 102 /* Context to describe whole processor state.  This only describes
 103    the core registers; coprocessor registers get saved elsewhere
 104    (e.g. in uc_regspace, or somewhere unspecified on the stack
 105    during non-RT signal handlers).  */
 106 typedef struct
 107   {
 108     unsigned long int __ctx(trap_no);
 109     unsigned long int __ctx(error_code);
 110     unsigned long int __ctx(oldmask);
 111     unsigned long int __ctx(arm_r0);
 112     unsigned long int __ctx(arm_r1);
 113     unsigned long int __ctx(arm_r2);
 114     unsigned long int __ctx(arm_r3);
 115     unsigned long int __ctx(arm_r4);
 116     unsigned long int __ctx(arm_r5);
 117     unsigned long int __ctx(arm_r6);
 118     unsigned long int __ctx(arm_r7);
 119     unsigned long int __ctx(arm_r8);
 120     unsigned long int __ctx(arm_r9);
 121     unsigned long int __ctx(arm_r10);
 122     unsigned long int __ctx(arm_fp);
 123     unsigned long int __ctx(arm_ip);
 124     unsigned long int __ctx(arm_sp);
 125     unsigned long int __ctx(arm_lr);
 126     unsigned long int __ctx(arm_pc);
 127     unsigned long int __ctx(arm_cpsr);
 128     unsigned long int __ctx(fault_address);
 129   } mcontext_t;
 130
 131 /* Userlevel context.  */
 132 typedef struct ucontext_t
 133   {
 134     unsigned long __ctx(uc_flags);
 135     struct ucontext_t *uc_link;
 136     stack_t uc_stack;
 137     mcontext_t uc_mcontext;
 138     sigset_t uc_sigmask;
 139     unsigned long __ctx(uc_regspace)[128] __attribute__((__aligned__(8)));
 140   } ucontext_t;
 141
 142 #undef __ctx
 143
 144 #endif /* sys/ucontext.h */