mirror of
https://github.com/UOX3DevTeam/UOX3
synced 2026-08-13 12:27:04 -04:00
94 lines
3.1 KiB
C++
94 lines
3.1 KiB
C++
/*
|
|
* Copyright (C) 2008 Apple Inc. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
|
|
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
|
|
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
|
|
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "ExecutableAllocator.h"
|
|
|
|
#if ENABLE_ASSEMBLER && WTF_PLATFORM_UNIX && !WTF_PLATFORM_SYMBIAN
|
|
|
|
#include <sys/mman.h>
|
|
#include <unistd.h>
|
|
#include <wtf/VMTags.h>
|
|
|
|
namespace JSC {
|
|
|
|
void ExecutableAllocator::intializePageSize()
|
|
{
|
|
ExecutableAllocator::pageSize = getpagesize();
|
|
}
|
|
|
|
ExecutablePool::Allocation ExecutablePool::systemAlloc(size_t n)
|
|
{
|
|
void* allocation = mmap(NULL, n, INITIAL_PROTECTION_FLAGS, MAP_PRIVATE | MAP_ANON, VM_TAG_FOR_EXECUTABLEALLOCATOR_MEMORY, 0);
|
|
if (allocation == MAP_FAILED)
|
|
allocation = NULL;
|
|
ExecutablePool::Allocation alloc = { reinterpret_cast<char*>(allocation), n };
|
|
return alloc;
|
|
}
|
|
|
|
void ExecutablePool::systemRelease(const ExecutablePool::Allocation& alloc)
|
|
{
|
|
int result = munmap(alloc.pages, alloc.size);
|
|
ASSERT_UNUSED(result, !result);
|
|
}
|
|
|
|
#if WTF_ENABLE_ASSEMBLER_WX_EXCLUSIVE
|
|
void ExecutableAllocator::reprotectRegion(void* start, size_t size, ProtectionSeting setting)
|
|
{
|
|
if (!pageSize)
|
|
intializePageSize();
|
|
|
|
// Calculate the start of the page containing this region,
|
|
// and account for this extra memory within size.
|
|
intptr_t startPtr = reinterpret_cast<intptr_t>(start);
|
|
intptr_t pageStartPtr = startPtr & ~(pageSize - 1);
|
|
void* pageStart = reinterpret_cast<void*>(pageStartPtr);
|
|
size += (startPtr - pageStartPtr);
|
|
|
|
// Round size up
|
|
size += (pageSize - 1);
|
|
size &= ~(pageSize - 1);
|
|
|
|
mprotect(pageStart, size, (setting == Writable) ? PROTECTION_FLAGS_RW : PROTECTION_FLAGS_RX);
|
|
}
|
|
#endif
|
|
|
|
#if WTF_CPU_ARM_TRADITIONAL && WTF_PLATFORM_LINUX && WTF_COMPILER_RVCT
|
|
__asm void ExecutableAllocator::cacheFlush(void* code, size_t size)
|
|
{
|
|
ARM
|
|
push {r7}
|
|
add r1, r1, r0
|
|
mov r7, #0xf0000
|
|
add r7, r7, #0x2
|
|
mov r2, #0x0
|
|
svc #0x0
|
|
pop {r7}
|
|
bx lr
|
|
}
|
|
#endif
|
|
|
|
}
|
|
|
|
#endif // HAVE(ASSEMBLER)
|