The C and C++ Include Header Files

/usr/include/x86_64-linux-gnu/bits/sigcontext.h


$ cat -n /usr/include/x86_64-linux-gnu/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 */