1 /* C API for x86 cpuid insn. 2 Copyright (C) 2007-2023 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 NAT_X86_CPUID_H 20 #define NAT_X86_CPUID_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 /* NAT_X86_CPUID_H */ 64