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/* C API for x86 cpuid insn.
Copyright (C) 2007-2023 Free Software Foundation, Inc.
This file is part of GDB.
This file is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3, or (at your option) any
later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef NAT_X86_CPUID_H
#define NAT_X86_CPUID_H
/* Always include the header for the cpu bit defines. */
#include "x86-gcc-cpuid.h"
#ifndef __cplusplus
/* This header file is also used in C code for some test-cases, so define
nullptr in C terms to avoid a compilation error. */
#define nullptr ((void *) 0)
#endif
#if defined(__i386__) || defined(__x86_64__)
/* Return cpuid data for requested cpuid level, as found in returned
eax, ebx, ecx and edx registers. The function checks if cpuid is
supported and returns 1 for valid cpuid information or 0 for
unsupported cpuid level. Pointers may be non-null. */
static __inline int
x86_cpuid (unsigned int __level,
unsigned int *__eax, unsigned int *__ebx,
unsigned int *__ecx, unsigned int *__edx)
{
unsigned int __scratch;
if (!__eax)
__eax = &__scratch;
if (!__ebx)
__ebx = &__scratch;
if (!__ecx)
__ecx = &__scratch;
if (!__edx)
__edx = &__scratch;
return __get_cpuid (__level, __eax, __ebx, __ecx, __edx);
}
/* Return cpuid data for requested cpuid level and sub-level, as found
in returned eax, ebx, ecx and edx registers. The function checks
if cpuid is supported and returns 1 for valid cpuid information or
0 for unsupported cpuid level. Pointers may be non-null. */
static __inline int
x86_cpuid_count (unsigned int __level, unsigned int __sublevel,
unsigned int *__eax, unsigned int *__ebx,
unsigned int *__ecx, unsigned int *__edx)
{
unsigned int __scratch;
if (__eax == nullptr)
__eax = &__scratch;
if (__ebx == nullptr)
__ebx = &__scratch;
if (__ecx == nullptr)
__ecx = &__scratch;
if (__edx == nullptr)
__edx = &__scratch;
return __get_cpuid_count (__level, __sublevel, __eax, __ebx, __ecx, __edx);
}
#else
static __inline int
x86_cpuid (unsigned int __level,
unsigned int *__eax, unsigned int *__ebx,
unsigned int *__ecx, unsigned int *__edx)
{
return 0;
}
static __inline int
x86_cpuid_count (unsigned int __level, unsigned int __sublevel,
unsigned int *__eax, unsigned int *__ebx,
unsigned int *__ecx, unsigned int *__edx)
{
return 0;
}
#endif /* i386 && x86_64 */
#ifndef __cplusplus
/* Avoid leaking this local definition beyond the scope of this header
file. */
#undef nullptr
#endif
#endif /* NAT_X86_CPUID_H */
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