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
hw_cpuid(u32 * a,u32 * b,u32 * c,u32 * d)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
hw_cpuid(u32 * a,u32 * b,u32 * c,u32 * d)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 */
78