GDB (xrefs)
x86-cpuid.h
Go to the documentation of this file.
1 /* C API for x86 cpuid insn.
2  Copyright (C) 2007-2015 Free Software Foundation, Inc.
3 
4  This file is part of GDB.
5 
6  This file is free software; you can redistribute it and/or modify it
7  under the terms of the GNU General Public License as published by the
8  Free Software Foundation; either version 3, or (at your option) any
9  later version.
10 
11  This program is distributed in the hope that it will be useful,
12  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  GNU General Public License for more details.
15 
16  You should have received a copy of the GNU General Public License
17  along with this program. If not, see <http://www.gnu.org/licenses/>. */
18 
19 #ifndef X86_CPUID_COMMON_H
20 #define X86_CPUID_COMMON_H
21 
22 /* Always include the header for the cpu bit defines. */
23 #include "x86-gcc-cpuid.h"
24 
25 #if defined(__i386__) || defined(__x86_64__)
26 
27 /* Return cpuid data for requested cpuid level, as found in returned
28  eax, ebx, ecx and edx registers. The function checks if cpuid is
29  supported and returns 1 for valid cpuid information or 0 for
30  unsupported cpuid level. Pointers may be non-null. */
31 
32 static __inline int
33 x86_cpuid (unsigned int __level,
34  unsigned int *__eax, unsigned int *__ebx,
35  unsigned int *__ecx, unsigned int *__edx)
36 {
37  unsigned int __scratch;
38 
39  if (!__eax)
40  __eax = &__scratch;
41  if (!__ebx)
42  __ebx = &__scratch;
43  if (!__ecx)
44  __ecx = &__scratch;
45  if (!__edx)
46  __edx = &__scratch;
47 
48  return __get_cpuid (__level, __eax, __ebx, __ecx, __edx);
49 }
50 
51 #else
52 
53 static __inline int
54 x86_cpuid (unsigned int __level,
55  unsigned int *__eax, unsigned int *__ebx,
56  unsigned int *__ecx, unsigned int *__edx)
57 {
58  return 0;
59 }
60 
61 #endif /* i386 && x86_64 */
62 
63 #endif /* X86_CPUID_COMMON_H */
static __inline int x86_cpuid(unsigned int __level, unsigned int *__eax, unsigned int *__ebx, unsigned int *__ecx, unsigned int *__edx)
Definition: x86-cpuid.h:54
static __inline int __get_cpuid(unsigned int __level, unsigned int *__eax, unsigned int *__ebx, unsigned int *__ecx, unsigned int *__edx)