78 lines
3.0 KiB
C
78 lines
3.0 KiB
C
/****************************************************************************
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*
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* Inline helpers for x86emu
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*
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* Copyright (C) 2008 Bart Trojanowski, Symbio Technologies, LLC
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*
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* ========================================================================
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*
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* Permission to use, copy, modify, distribute, and sell this software and
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* its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and that
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* both that copyright notice and this permission notice appear in
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* supporting documentation, and that the name of the authors not be used
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* in advertising or publicity pertaining to distribution of the software
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* without specific, written prior permission. The authors makes no
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* representations about the suitability of this software for any purpose.
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* It is provided "as is" without express or implied warranty.
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*
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* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
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* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*
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* ========================================================================
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*
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* Language: GNU C
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* Environment: GCC on i386 or x86-64
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* Developer: Bart Trojanowski
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*
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* Description: This file defines a few x86 macros that can be used by the
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* emulator to execute native instructions.
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*
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* For PIC vs non-PIC code refer to:
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* http://sam.zoy.org/blog/2007-04-13-shlib-with-non-pic-code-have-inline-assembly-and-pic-mix-well
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*
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****************************************************************************/
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#ifndef __X86EMU_PRIM_X86_GCC_H
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#define __X86EMU_PRIM_X86_GCC_H
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#include "x86emu/types.h"
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#if !defined(__GNUC__) || !(defined (__i386__) || defined(__i386) || defined(__AMD64__) || defined(__amd64__))
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#error This file is intended to be used by gcc on i386 or x86-64 system
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#endif
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#if defined(__PIC__) && defined(__i386__)
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#define X86EMU_HAS_HW_CPUID 1
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static inline void
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hw_cpuid(u32 * a, u32 * b, u32 * c, u32 * d)
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{
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__asm__ __volatile__("pushl %%ebx \n\t"
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"cpuid \n\t"
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"movl %%ebx, %1 \n\t"
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"popl %%ebx \n\t":"=a"(*a), "=r"(*b),
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"=c"(*c), "=d"(*d)
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:"a"(*a), "c"(*c)
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:"cc");
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}
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#else /* ! (__PIC__ && __i386__) */
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#define x86EMU_HAS_HW_CPUID 1
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static inline void
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hw_cpuid(u32 * a, u32 * b, u32 * c, u32 * d)
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{
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__asm__ __volatile__("cpuid":"=a"(*a), "=b"(*b), "=c"(*c), "=d"(*d)
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:"a"(*a), "c"(*c)
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:"cc");
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}
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#endif /* __PIC__ && __i386__ */
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#endif /* __X86EMU_PRIM_X86_GCC_H */
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