gdb/nat/x86-cpuid.h

   1 /* C API for x86 cpuid insn.
   2    Copyright (C) 2007-2020 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 */