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https://gitlab.winehq.org/wine/wine-gecko.git
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148 lines
4.9 KiB
C++
148 lines
4.9 KiB
C++
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/* -*- Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 4 -*- */
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/* vi: set ts=4 sw=4 expandtab: (add to ~/.vimrc: set modeline modelines=5) */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1 (the
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* "License"); you may not use this file except in compliance with the License. You may obtain
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* a copy of the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis, WITHOUT
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* WARRANTY OF ANY KIND, either express or implied. See the License for the specific
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* language governing rights and limitations under the License.
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*
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* The Original Code is [Open Source Virtual Machine.]
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*
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* The Initial Developer of the Original Code is Adobe System Incorporated. Portions created
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* by the Initial Developer are Copyright (C)[ 2004-2006 ] Adobe Systems Incorporated. All Rights
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* Reserved.
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*
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* Contributor(s): Adobe AS3 Team
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* Andreas Gal <gal@mozilla.com>
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*
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* Alternatively, the contents of this file may be used under the terms of either the GNU
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* General Public License Version 2 or later (the "GPL"), or the GNU Lesser General Public
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* License Version 2.1 or later (the "LGPL"), in which case the provisions of the GPL or the
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* LGPL are applicable instead of those above. If you wish to allow use of your version of this
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* file only under the terms of either the GPL or the LGPL, and not to allow others to use your
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* version of this file under the terms of the MPL, indicate your decision by deleting provisions
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* above and replace them with the notice and other provisions required by the GPL or the
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* LGPL. If you do not delete the provisions above, a recipient may use your version of this file
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* under the terms of any one of the MPL, the GPL or the LGPL.
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*
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***** END LICENSE BLOCK ***** */
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#include "nanojit.h"
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#ifdef SOLARIS
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typedef caddr_t maddr_ptr;
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#else
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typedef void *maddr_ptr;
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#endif
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using namespace avmplus;
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#ifdef WIN32
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void
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VMPI_setPageProtection(void *address,
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size_t size,
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bool executableFlag,
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bool writeableFlag)
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{
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DWORD oldProtectFlags = 0;
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DWORD newProtectFlags = 0;
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if ( executableFlag && writeableFlag ) {
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newProtectFlags = PAGE_EXECUTE_READWRITE;
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} else if ( executableFlag ) {
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newProtectFlags = PAGE_EXECUTE_READ;
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} else if ( writeableFlag ) {
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newProtectFlags = PAGE_READWRITE;
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} else {
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newProtectFlags = PAGE_READONLY;
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}
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BOOL retval;
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MEMORY_BASIC_INFORMATION mbi;
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do {
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VirtualQuery(address, &mbi, sizeof(MEMORY_BASIC_INFORMATION));
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size_t markSize = size > mbi.RegionSize ? mbi.RegionSize : size;
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retval = VirtualProtect(address, markSize, newProtectFlags, &oldProtectFlags);
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NanoAssert(retval);
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address = (char*) address + markSize;
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size -= markSize;
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} while(size > 0 && retval);
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// We should not be clobbering PAGE_GUARD protections
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NanoAssert((oldProtectFlags & PAGE_GUARD) == 0);
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}
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#elif defined(AVMPLUS_OS2)
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void
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VMPI_setPageProtection(void *address,
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size_t size,
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bool executableFlag,
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bool writeableFlag)
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{
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ULONG flags = PAG_READ;
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if (executableFlag) {
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flags |= PAG_EXECUTE;
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}
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if (writeableFlag) {
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flags |= PAG_WRITE;
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}
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address = (void*)((size_t)address & ~(0xfff));
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size = (size + 0xfff) & ~(0xfff);
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ULONG attribFlags = PAG_FREE;
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while (size) {
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ULONG attrib;
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ULONG range = size;
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ULONG retval = DosQueryMem(address, &range, &attrib);
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AvmAssert(retval == 0);
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// exit if this is the start of the next memory object
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if (attrib & attribFlags) {
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break;
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}
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attribFlags |= PAG_BASE;
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range = size > range ? range : size;
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retval = DosSetMem(address, range, flags);
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AvmAssert(retval == 0);
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address = (char*)address + range;
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size -= range;
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}
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}
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#else // !WIN32 && !AVMPLUS_OS2
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void VMPI_setPageProtection(void *address,
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size_t size,
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bool executableFlag,
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bool writeableFlag)
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{
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int bitmask = sysconf(_SC_PAGESIZE) - 1;
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// mprotect requires that the addresses be aligned on page boundaries
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void *endAddress = (void*) ((char*)address + size);
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void *beginPage = (void*) ((size_t)address & ~bitmask);
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void *endPage = (void*) (((size_t)endAddress + bitmask) & ~bitmask);
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size_t sizePaged = (size_t)endPage - (size_t)beginPage;
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int flags = PROT_READ;
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if (executableFlag) {
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flags |= PROT_EXEC;
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}
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if (writeableFlag) {
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flags |= PROT_WRITE;
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}
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int retval = mprotect((maddr_ptr)beginPage, (unsigned int)sizePaged, flags);
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AvmAssert(retval == 0);
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(void)retval;
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}
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#endif // WIN32
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