sysdeps/unix/sysv/linux/x86/bits/sigcontext.h

   1 /* Copyright (C) 2002-2024 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    <https://www.gnu.org/licenses/>.  */
  17
  18 #ifndef _BITS_SIGCONTEXT_H
  19 #define _BITS_SIGCONTEXT_H  1
  20
  21 #if !defined _SIGNAL_H && !defined _SYS_UCONTEXT_H
  22 # error "Never use <bits/sigcontext.h> directly; include <signal.h> instead."
  23 #endif
  24
  25 #include <bits/types.h>
  26
  27 #define FP_XSTATE_MAGIC1        0x46505853U
  28 #define FP_XSTATE_MAGIC2        0x46505845U
  29 #define FP_XSTATE_MAGIC2_SIZE   sizeof (FP_XSTATE_MAGIC2)
  30
  31 struct _fpx_sw_bytes
  32 {
  33   __uint32_t magic1;
  34   __uint32_t extended_size;
  35   __uint64_t xstate_bv;
  36   __uint32_t xstate_size;
  37   __uint32_t __glibc_reserved1[7];
  38 };
  39
  40 struct _fpreg
  41 {
  42   unsigned short significand[4];
  43   unsigned short exponent;
  44 };
  45
  46 struct _fpxreg
  47 {
  48   unsigned short significand[4];
  49   unsigned short exponent;
  50   unsigned short __glibc_reserved1[3];
  51 };
  52
  53 struct _xmmreg
  54 {
  55   __uint32_t    element[4];
  56 };
  57
  58
  59
  60 #ifndef __x86_64__
  61
  62 struct _fpstate
  63 {
  64   /* Regular FPU environment.  */
  65   __uint32_t    cw;
  66   __uint32_t            sw;
  67   __uint32_t            tag;
  68   __uint32_t            ipoff;
  69   __uint32_t            cssel;
  70   __uint32_t            dataoff;
  71   __uint32_t            datasel;
  72   struct _fpreg _st[8];
  73   unsigned short status;
  74   unsigned short magic;
  75
  76   /* FXSR FPU environment.  */
  77   __uint32_t            _fxsr_env[6];
  78   __uint32_t            mxcsr;
  79   __uint32_t            __glibc_reserved1;
  80   struct _fpxreg        _fxsr_st[8];
  81   struct _xmmreg        _xmm[8];
  82   __uint32_t            __glibc_reserved2[56];
  83 };
  84
  85 #ifndef sigcontext_struct
  86 /* Kernel headers before 2.1.1 define a struct sigcontext_struct, but
  87    we need sigcontext.  Some packages have come to rely on
  88    sigcontext_struct being defined on 32-bit x86, so define this for
  89    their benefit.  */
  90 # define sigcontext_struct sigcontext
  91 #endif
  92
  93 #define X86_FXSR_MAGIC          0x0000
  94
  95 struct sigcontext
  96 {
  97   unsigned short gs, __gsh;
  98   unsigned short fs, __fsh;
  99   unsigned short es, __esh;
 100   unsigned short ds, __dsh;
 101   unsigned long edi;
 102   unsigned long esi;
 103   unsigned long ebp;
 104   unsigned long esp;
 105   unsigned long ebx;
 106   unsigned long edx;
 107   unsigned long ecx;
 108   unsigned long eax;
 109   unsigned long trapno;
 110   unsigned long err;
 111   unsigned long eip;
 112   unsigned short cs, __csh;
 113   unsigned long eflags;
 114   unsigned long esp_at_signal;
 115   unsigned short ss, __ssh;
 116   struct _fpstate * fpstate;
 117   unsigned long oldmask;
 118   unsigned long cr2;
 119 };
 120
 121 #else /* __x86_64__ */
 122
 123 struct _fpstate
 124 {
 125   /* FPU environment matching the 64-bit FXSAVE layout.  */
 126   __uint16_t            cwd;
 127   __uint16_t            swd;
 128   __uint16_t            ftw;
 129   __uint16_t            fop;
 130   __uint64_t            rip;
 131   __uint64_t            rdp;
 132   __uint32_t            mxcsr;
 133   __uint32_t            mxcr_mask;
 134   struct _fpxreg        _st[8];
 135   struct _xmmreg        _xmm[16];
 136   __uint32_t            __glibc_reserved1[24];
 137 };
 138
 139 struct sigcontext
 140 {
 141   __uint64_t r8;
 142   __uint64_t r9;
 143   __uint64_t r10;
 144   __uint64_t r11;
 145   __uint64_t r12;
 146   __uint64_t r13;
 147   __uint64_t r14;
 148   __uint64_t r15;
 149   __uint64_t rdi;
 150   __uint64_t rsi;
 151   __uint64_t rbp;
 152   __uint64_t rbx;
 153   __uint64_t rdx;
 154   __uint64_t rax;
 155   __uint64_t rcx;
 156   __uint64_t rsp;
 157   __uint64_t rip;
 158   __uint64_t eflags;
 159   unsigned short cs;
 160   unsigned short gs;
 161   unsigned short fs;
 162   unsigned short __pad0;
 163   __uint64_t err;
 164   __uint64_t trapno;
 165   __uint64_t oldmask;
 166   __uint64_t cr2;
 167   __extension__ union
 168     {
 169       struct _fpstate * fpstate;
 170       __uint64_t __fpstate_word;
 171     };
 172   __uint64_t __reserved1 [8];
 173 };
 174
 175 #endif /* __x86_64__ */
 176
 177 struct _xsave_hdr
 178 {
 179   __uint64_t xstate_bv;
 180   __uint64_t __glibc_reserved1[2];
 181   __uint64_t __glibc_reserved2[5];
 182 };
 183
 184 struct _ymmh_state
 185 {
 186   __uint32_t ymmh_space[64];
 187 };
 188
 189 struct _xstate
 190 {
 191   struct _fpstate fpstate;
 192   struct _xsave_hdr xstate_hdr;
 193   struct _ymmh_state ymmh;
 194 };
 195
 196 #endif /* _BITS_SIGCONTEXT_H */