source: gpfs_3.1_ker2.6.20/lpp/mmfs/src/gpl-linux/mmwrap.c @ 152

Last change on this file since 152 was 16, checked in by rock, 17 years ago
File size: 3.1 KB
Line 
1/***************************************************************************
2 *
3 * Copyright (C) 2001 International Business Machines
4 * All rights reserved.
5 *
6 * This file is part of the GPFS mmfslinux kernel module.
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 notice,
13 *     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 the
16 *     documentation and/or other materials provided with the distribution.
17 *  3. The name of the author may not be used to endorse or promote products
18 *     derived from this software without specific prior written
19 *     permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
27 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
28 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
29 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
30 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 *
32 *************************************************************************** */
33/* @(#)53       1.2  src/avs/fs/mmfs/ts/kernext/gpl-linux/mmwrap.c, mmfs, avs_rgpfs24, rgpfs240610b 2/27/06 03:01:20 */
34/* This file is only used to support i386 Linux 2.6 Kernels built with
35 * CONFIG_REGPARM. The libgcc functions __divdi3, __udivdi3,
36 * __moddi3, __umoddi3 are used for 64bit integer division and
37 * modulo. The compiler generates calls to these functions following the
38 * -mregparm=3 option when compiling 32bit code. To get valid divide
39 * and modulo in when compliing with -mregparm=3 we wrap these functions
40 * using the --wrap ld option and call them with args on the stack.
41 */
42
43#if defined(GPFS_ARCH_I386) && LINUX_KERNEL_VERSION > 2060500 && !defined(NOKREGPARMS)
44
45extern long long __real___divdi3(long long a, long long b) __attribute__ ((regparm(0)));
46extern long long __real___udivdi3(long long a, long long b) __attribute__ ((regparm(0)));
47extern long long __real___moddi3(long long a, long long b) __attribute__ ((regparm(0)));
48extern long long __real___umoddi3(long long a, long long b) __attribute__ ((regparm(0)));
49
50long long
51__wrap___divdi3(long long a, long long b)
52{
53        return(__real___divdi3(a,b));
54}
55
56unsigned long long
57__wrap___udivdi3(unsigned long long a, unsigned long long b)
58{
59        return(__real___udivdi3(a,b));
60}
61
62long long
63__wrap___moddi3(long long a, long long b)
64{
65  return(__real___moddi3(a,b));
66}
67
68unsigned long long
69__wrap___umoddi3(unsigned long long a, unsigned long long b)
70{
71  return(__real___umoddi3(a,b));
72}
73
74#endif
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