00001 /***************************************************************************************** 00002 Copyright (c) 2002-2004 The UbixOS Project 00003 All rights reserved. 00004 00005 Redistribution and use in source and binary forms, with or without modification, are 00006 permitted provided that the following conditions are met: 00007 00008 Redistributions of source code must retain the above copyright notice, this list of 00009 conditions, the following disclaimer and the list of authors. Redistributions in binary 00010 form must reproduce the above copyright notice, this list of conditions, the following 00011 disclaimer and the list of authors in the documentation and/or other materials provided 00012 with the distribution. Neither the name of the UbixOS Project nor the names of its 00013 contributors may be used to endorse or promote products derived from this software 00014 without specific prior written permission. 00015 00016 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY 00017 EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 00018 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 00019 THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 00020 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 00021 OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 00022 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR 00023 TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 00024 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00025 00026 $Id: page__fault_8S-source.html 88 2016-01-12 00:11:29Z reddawg $ 00027 00028 *****************************************************************************************/ 00029 00030 /* 00031 Page fault wrapper this will aquire some values we need for later use 00032 */ 00033 00034 .globl _vmm_pageFault 00035 .text 00036 .code32 00037 _vmm_pageFault: 00038 xchgl %eax,(%esp) /* Save EAX */ 00039 movl 4(%esp),%eax /* Move EIP into EAX to use later */ 00040 pushl %ebx /* Save EBX */ 00041 movl 20(%esp),%ebx /* Save ESP for ring 3 to use later */ 00042 pushl %ecx /* Save ECX,EDX */ 00043 pushl %edx 00044 push %ebx /* Push ESP */ 00045 push %eax /* Push EIP */ 00046 movl %cr2,%eax /* Push the faulted address */ 00047 pushl %eax 00048 sti /* Turn interrupts back on we are now entrant safe */ 00049 call vmm_pageFault /* Call our page fault handler */ 00050 addl $0xC,%esp /* Adjust the stack to compensate for pushed values */ 00051 popl %edx /* Restore EAX,EBX,ECX,EDX */ 00052 popl %ecx 00053 popl %ebx 00054 popl %eax 00055 iret /* Return from the interrupt */ 00056 00057 00058 /*** 00059 END 00060 ***/
1.4.7