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64 lines
1.8 KiB
C
64 lines
1.8 KiB
C
/* C API for x86 cpuid insn.
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Copyright (C) 2007-2018 Free Software Foundation, Inc.
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This file is part of GDB.
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This file is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 3, or (at your option) any
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later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef X86_CPUID_COMMON_H
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#define X86_CPUID_COMMON_H
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/* Always include the header for the cpu bit defines. */
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#include "x86-gcc-cpuid.h"
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#if defined(__i386__) || defined(__x86_64__)
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/* Return cpuid data for requested cpuid level, as found in returned
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eax, ebx, ecx and edx registers. The function checks if cpuid is
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supported and returns 1 for valid cpuid information or 0 for
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unsupported cpuid level. Pointers may be non-null. */
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static __inline int
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x86_cpuid (unsigned int __level,
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unsigned int *__eax, unsigned int *__ebx,
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unsigned int *__ecx, unsigned int *__edx)
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{
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unsigned int __scratch;
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if (!__eax)
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__eax = &__scratch;
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if (!__ebx)
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__ebx = &__scratch;
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if (!__ecx)
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__ecx = &__scratch;
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if (!__edx)
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__edx = &__scratch;
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return __get_cpuid (__level, __eax, __ebx, __ecx, __edx);
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}
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#else
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static __inline int
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x86_cpuid (unsigned int __level,
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unsigned int *__eax, unsigned int *__ebx,
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unsigned int *__ecx, unsigned int *__edx)
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{
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return 0;
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}
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#endif /* i386 && x86_64 */
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#endif /* X86_CPUID_COMMON_H */
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