sys/emulation/ndis/regcall.h

   1 /*
   2  *
   3  * Copyright (c) 2004 The DragonFly Project.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to The DragonFly Project
   6  * by Matthew Dillon <dillon@backplane.com>
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in
  16  *    the documentation and/or other materials provided with the
  17  *    distribution.
  18  * 3. Neither the name of The DragonFly Project nor the names of its
  19  *    contributors may be used to endorse or promote products derived
  20  *    from this software without specific, prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  23  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  24  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  25  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  26  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  27  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  28  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  29  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  30  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  31  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  32  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  *
  35  * Copyright (c) 2003
  36  *      Bill Paul <wpaul@windriver.com>.  All rights reserved.
  37  *
  38  * Redistribution and use in source and binary forms, with or without
  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  * 1. Redistributions of source code must retain the above copyright
  42  *    notice, this list of conditions and the following disclaimer.
  43  * 2. Redistributions in binary form must reproduce the above copyright
  44  *    notice, this list of conditions and the following disclaimer in the
  45  *    documentation and/or other materials provided with the distribution.
  46  * 3. All advertising materials mentioning features or use of this software
  47  *    must display the following acknowledgement:
  48  *      This product includes software developed by Bill Paul.
  49  * 4. Neither the name of the author nor the names of any co-contributors
  50  *    may be used to endorse or promote products derived from this software
  51  *    without specific prior written permission.
  52  *
  53  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
  54  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  55  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  56  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
  57  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  58  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  59  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  60  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  61  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  62  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  63  * THE POSSIBILITY OF SUCH DAMAGE.
  64  *
  65  * $FreeBSD: src/sys/compat/ndis/pe_var.h,v 1.7 2004/04/14 07:48:02 wpaul Exp $
  66  * $DragonFly: src/sys/emulation/ndis/regcall.h,v 1.1 2004/07/29 20:51:34 dillon Exp $
  67  */
  68
  69 #ifndef _REGCALL_H_
  70 #define _REGCALL_H_
  71
  72 /*
  73  * Note: Windows uses the _stdcall calling convention. This means
  74  * that the callback functions provided in the function table must
  75  * be declared using __attribute__((__stdcall__)), otherwise the
  76  * Windows code will likely screw up the %esp register and cause
  77  * us to jump to an invalid address when it returns.   With the
  78  * stdcall calling convention the target procedure is responsible for
  79  * popping the call arguments.
  80  *
  81  * Note: Windows often passes arguments in registers.  In windows
  82  * the order is: %ecx, %edx.  The regparm(3) attribute in GNU C will
  83  * pass arguments in the order: %eax, %edx, %ecx, with any remaining
  84  * arguments passed on the stack.
  85  */
  86
  87 #ifdef __amd64__
  88 #define __stdcall
  89 #define __regcall
  90 #define REGARGS1(decl1)         decl1
  91 #define REGARGS2(decl1, decl2)  decl1, decl2
  92 #define REGCALL1(arg1)          arg1
  93 #define REGCALL2(arg1, arg2)    arg1, arg2
  94 #else
  95 #define __stdcall __attribute__((__stdcall__))
  96 #define __regcall __attribute__((__regparm__(3)))
  97 #define REGARGS1(decl1)         int dummy1, int dummy2, decl1
  98 #define REGARGS2(decl1, decl2)  int dummy1, decl2, decl1
  99 #define REGCALL1(arg1)          0, 0, arg1
 100 #define REGCALL2(arg1, arg2)    0, arg2, arg1
 101 #endif
 102
 103
 104 /*
 105  * This mess allows us to call a _fastcall style routine with our
 106  * version of gcc, which lacks __attribute__((__fastcall__)). Only
 107  * has meaning on x86; everywhere else, it's a no-op.
 108  */
 109
 110 #ifdef __i386__
 111 typedef __stdcall __regcall int (*fcall1)(REGARGS1(uint32_t));
 112 typedef __stdcall __regcall int (*fcall2)(REGARGS2(uint32_t, uint32_t));
 113 typedef __stdcall __regcall int (*fcall3)(REGARGS2(uint32_t, uint32_t), uint32_t);
 114 static __inline uint32_t
 115 fastcall1(fcall1 f, uint32_t a)
 116 {
 117         return(f(REGCALL1(a)));
 118 }
 119
 120 static __inline uint32_t
 121 fastcall2(fcall2 f, uint32_t a, uint32_t b)
 122 {
 123         return(f(REGCALL2(a, b)));
 124 }
 125
 126 static __inline uint32_t
 127 fastcall3(fcall3 f, uint32_t a, uint32_t b, uint32_t c)
 128 {
 129         return(f(REGCALL2(a, b), c));
 130 }
 131
 132 #define FASTCALL1(f, a)         \
 133         fastcall1((fcall1)(f), (uint32_t)(a))
 134 #define FASTCALL2(f, a, b)      \
 135         fastcall2((fcall2)(f), (uint32_t)(a), (uint32_t)(b))
 136 #define FASTCALL3(f, a, b, c)   \
 137         fastcall3((fcall3)(f), (uint32_t)(a), (uint32_t)(b), (uint32_t)(c))
 138 #else
 139 #define FASTCALL1(f, a) (f)((a))
 140 #define FASTCALL2(f, a, b) (f)((a), (b))
 141 #define FASTCALL3(f, a, b, c) (f)((a), (b), (c))
 142 #endif /* __i386__ */
 143
 144 #endif