projects / thirdparty / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| 4d157a3d | 1 | /* C API for x86 cpuid insn. |
| 1d506c26 | 2 | Copyright (C) 2007-2024 Free Software Foundation, Inc. |
| 4d157a3d MF |
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 | ||
| 1a5c2598 TT |
19 | #ifndef NAT_X86_CPUID_H |
| 20 | #define NAT_X86_CPUID_H | |
| 4d157a3d MF |
21 | |
| 22 | /* Always include the header for the cpu bit defines. */ | |
| df7e5265 | 23 | #include "x86-gcc-cpuid.h" |
| 4d157a3d | 24 | |
| 97319ac8 TV |
25 | #ifndef __cplusplus |
| 26 | /* This header file is also used in C code for some test-cases, so define | |
| 27 | nullptr in C terms to avoid a compilation error. */ | |
| 28 | #define nullptr ((void *) 0) | |
| 29 | #endif | |
| 30 | ||
| 4d157a3d MF |
31 | /* Return cpuid data for requested cpuid level, as found in returned |
| 32 | eax, ebx, ecx and edx registers. The function checks if cpuid is | |
| 33 | supported and returns 1 for valid cpuid information or 0 for | |
| 34 | unsupported cpuid level. Pointers may be non-null. */ | |
| 35 | ||
| 36 | static __inline int | |
| df7e5265 | 37 | x86_cpuid (unsigned int __level, |
| 4d157a3d MF |
38 | unsigned int *__eax, unsigned int *__ebx, |
| 39 | unsigned int *__ecx, unsigned int *__edx) | |
| 40 | { | |
| 41 | unsigned int __scratch; | |
| 42 | ||
| 43 | if (!__eax) | |
| 44 | __eax = &__scratch; | |
| 45 | if (!__ebx) | |
| 46 | __ebx = &__scratch; | |
| 47 | if (!__ecx) | |
| 48 | __ecx = &__scratch; | |
| 49 | if (!__edx) | |
| 50 | __edx = &__scratch; | |
| 51 | ||
| 52 | return __get_cpuid (__level, __eax, __ebx, __ecx, __edx); | |
| 53 | } | |
| 54 | ||
| e85aad4a JB |
55 | /* Return cpuid data for requested cpuid level and sub-level, as found |
| 56 | in returned eax, ebx, ecx and edx registers. The function checks | |
| 57 | if cpuid is supported and returns 1 for valid cpuid information or | |
| 58 | 0 for unsupported cpuid level. Pointers may be non-null. */ | |
| 59 | ||
| 60 | static __inline int | |
| 61 | x86_cpuid_count (unsigned int __level, unsigned int __sublevel, | |
| 62 | unsigned int *__eax, unsigned int *__ebx, | |
| 63 | unsigned int *__ecx, unsigned int *__edx) | |
| 64 | { | |
| 65 | unsigned int __scratch; | |
| 66 | ||
| 67 | if (__eax == nullptr) | |
| 68 | __eax = &__scratch; | |
| 69 | if (__ebx == nullptr) | |
| 70 | __ebx = &__scratch; | |
| 71 | if (__ecx == nullptr) | |
| 72 | __ecx = &__scratch; | |
| 73 | if (__edx == nullptr) | |
| 74 | __edx = &__scratch; | |
| 75 | ||
| 76 | return __get_cpuid_count (__level, __sublevel, __eax, __ebx, __ecx, __edx); | |
| 77 | } | |
| 78 | ||
| 97319ac8 TV |
79 | #ifndef __cplusplus |
| 80 | /* Avoid leaking this local definition beyond the scope of this header | |
| 81 | file. */ | |
| 82 | #undef nullptr | |
| 83 | #endif | |
| 84 | ||
| 1a5c2598 | 85 | #endif /* NAT_X86_CPUID_H */ |