| 1 | /*************************************************************************** |
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| 2 | * |
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| 3 | * Copyright (C) 2001 International Business Machines |
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| 4 | * All rights reserved. |
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| 5 | * |
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| 6 | * This file is part of the GPFS mmfslinux kernel module. |
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| 7 | * |
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| 8 | * Redistribution and use in source and binary forms, with or without |
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| 9 | * modification, are permitted provided that the following conditions |
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| 10 | * are met: |
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| 11 | * |
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| 12 | * 1. Redistributions of source code must retain the above copyright notice, |
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| 13 | * this list of conditions and the following disclaimer. |
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| 14 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 15 | * notice, this list of conditions and the following disclaimer in the |
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| 16 | * documentation and/or other materials provided with the distribution. |
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| 17 | * 3. The name of the author may not be used to endorse or promote products |
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| 18 | * derived from this software without specific prior written |
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| 19 | * permission. |
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| 20 | * |
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| 21 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 22 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 23 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 24 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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| 25 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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| 26 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
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| 27 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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| 28 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
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| 29 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
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| 30 | * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 31 | * |
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| 32 | *************************************************************************** */ |
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| 33 | /* @(#)53 1.2 src/avs/fs/mmfs/ts/kernext/gpl-linux/mmwrap.c, mmfs, avs_rgpfs24, rgpfs240610b 2/27/06 03:01:20 */ |
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| 34 | /* This file is only used to support i386 Linux 2.6 Kernels built with |
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| 35 | * CONFIG_REGPARM. The libgcc functions __divdi3, __udivdi3, |
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| 36 | * __moddi3, __umoddi3 are used for 64bit integer division and |
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| 37 | * modulo. The compiler generates calls to these functions following the |
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| 38 | * -mregparm=3 option when compiling 32bit code. To get valid divide |
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| 39 | * and modulo in when compliing with -mregparm=3 we wrap these functions |
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| 40 | * using the --wrap ld option and call them with args on the stack. |
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| 41 | */ |
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| 42 | |
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| 43 | #if defined(GPFS_ARCH_I386) && LINUX_KERNEL_VERSION > 2060500 && !defined(NOKREGPARMS) |
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| 44 | |
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| 45 | extern long long __real___divdi3(long long a, long long b) __attribute__ ((regparm(0))); |
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| 46 | extern long long __real___udivdi3(long long a, long long b) __attribute__ ((regparm(0))); |
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| 47 | extern long long __real___moddi3(long long a, long long b) __attribute__ ((regparm(0))); |
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| 48 | extern long long __real___umoddi3(long long a, long long b) __attribute__ ((regparm(0))); |
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| 49 | |
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| 50 | long long |
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| 51 | __wrap___divdi3(long long a, long long b) |
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| 52 | { |
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| 53 | return(__real___divdi3(a,b)); |
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| 54 | } |
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| 55 | |
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| 56 | unsigned long long |
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| 57 | __wrap___udivdi3(unsigned long long a, unsigned long long b) |
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| 58 | { |
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| 59 | return(__real___udivdi3(a,b)); |
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| 60 | } |
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| 61 | |
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| 62 | long long |
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| 63 | __wrap___moddi3(long long a, long long b) |
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| 64 | { |
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| 65 | return(__real___moddi3(a,b)); |
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| 66 | } |
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| 67 | |
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| 68 | unsigned long long |
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| 69 | __wrap___umoddi3(unsigned long long a, unsigned long long b) |
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| 70 | { |
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| 71 | return(__real___umoddi3(a,b)); |
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| 72 | } |
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| 73 | |
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| 74 | #endif |
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