hw/xfree86/x86emu/x86emu/prim_x86_gcc.h

   1 /****************************************************************************
   2 *
   3 * Inline helpers for x86emu
   4 *
   5 * Copyright (C) 2008 Bart Trojanowski, Symbio Technologies, LLC
   6 *
   7 *  ========================================================================
   8 *
   9 *  Permission to use, copy, modify, distribute, and sell this software and
  10 *  its documentation for any purpose is hereby granted without fee,
  11 *  provided that the above copyright notice appear in all copies and that
  12 *  both that copyright notice and this permission notice appear in
  13 *  supporting documentation, and that the name of the authors not be used
  14 *  in advertising or publicity pertaining to distribution of the software
  15 *  without specific, written prior permission.  The authors makes no
  16 *  representations about the suitability of this software for any purpose.
  17 *  It is provided "as is" without express or implied warranty.
  18 *
  19 *  THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  20 *  INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  21 *  EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  22 *  CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
  23 *  USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
  24 *  OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  25 *  PERFORMANCE OF THIS SOFTWARE.
  26 *
  27 *  ========================================================================
  28 *
  29 * Language:     GNU C
  30 * Environment:  GCC on i386 or x86-64
  31 * Developer:    Bart Trojanowski
  32 *
  33 * Description:  This file defines a few x86 macros that can be used by the
  34 *               emulator to execute native instructions.
  35 *
  36 *               For PIC vs non-PIC code refer to:
  37 *               http://sam.zoy.org/blog/2007-04-13-shlib-with-non-pic-code-have-inline-assembly-and-pic-mix-well
  38 *
  39 ****************************************************************************/
  40 #ifndef __X86EMU_PRIM_X86_GCC_H
  41 #define __X86EMU_PRIM_X86_GCC_H
  42
  43 #include "x86emu/types.h"
  44
  45 #if !defined(__GNUC__) || !(defined (__i386__) || defined(__i386) || defined(__AMD64__) || defined(__amd64__))
  46 #error This file is intended to be used by gcc on i386 or x86-64 system
  47 #endif
  48
  49 #if defined(__PIC__) && defined(__i386__)
  50
  51 #define X86EMU_HAS_HW_CPUID 1
  52 static inline void
  53 hw_cpuid(u32 * a, u32 * b, u32 * c, u32 * d)
  54 {
  55     __asm__ __volatile__("pushl %%ebx      \n\t"
  56                          "cpuid            \n\t"
  57                          "movl %%ebx, %1   \n\t"
  58                          "popl %%ebx       \n\t":"=a"(*a), "=r"(*b),
  59                          "=c"(*c), "=d"(*d)
  60                          :"a"(*a), "c"(*c)
  61                          :"cc");
  62 }
  63
  64 #else                           /* ! (__PIC__ && __i386__) */
  65
  66 #define x86EMU_HAS_HW_CPUID 1
  67 static inline void
  68 hw_cpuid(u32 * a, u32 * b, u32 * c, u32 * d)
  69 {
  70     __asm__ __volatile__("cpuid":"=a"(*a), "=b"(*b), "=c"(*c), "=d"(*d)
  71                          :"a"(*a), "c"(*c)
  72                          :"cc");
  73 }
  74
  75 #endif                          /* __PIC__ && __i386__ */
  76
  77 #endif                          /* __X86EMU_PRIM_X86_GCC_H */