protected virtual void Dispose()
{
if (dataHandle.IsAllocated)
{
dataHandle.Free();
}
if (this.initialized)
{
this.dllEntry(new IntPtr(this.codeBase), DllReason.DLL_PROCESS_DETACH, IntPtr.Zero);
this.initialized = false;
}
if (this.modules.Count > 0)
{
foreach (IntPtr module in this.modules)
{
if (module != new IntPtr(-1) || module != IntPtr.Zero) // INVALID_HANDLE
{
NativeDeclarations.FreeLibrary(module);
}
}
}
if (this.codeBase != null)
{
NativeDeclarations.VirtualFree(new IntPtr(this.codeBase), 0, AllocationType.RELEASE);
}
this.Disposed = true;
}
private void FinalizeSections()
{
int imageOffset = 0;
IMAGE_SECTION_HEADER *section = (IMAGE_SECTION_HEADER *)NativeDeclarations.IMAGE_FIRST_SECTION(this.headers);
for (int i = 0; i < this.headers->FileHeader.NumberOfSections; i++, section++)
{
uint protect, oldProtect, size;
int executable = (section->Characteristics & (uint)ImageSectionFlags.IMAGE_SCN_MEM_EXECUTE) != 0 ? 1 : 0;
int readable = (section->Characteristics & (uint)ImageSectionFlags.IMAGE_SCN_MEM_READ) != 0 ? 1 : 0;
int writeable = (section->Characteristics & (uint)ImageSectionFlags.IMAGE_SCN_MEM_WRITE) != 0 ? 1 : 0;
if ((section->Characteristics & (int)ImageSectionFlags.IMAGE_SCN_MEM_DISCARDABLE) > 0)
{
NativeDeclarations.VirtualFree(new IntPtr(section->PhysicalAddress | (uint)imageOffset), section->SizeOfRawData, AllocationType.DECOMMIT);
continue;
}
protect = (uint)ProtectionFlags[executable, readable, writeable];
if ((section->Characteristics & (uint)ImageSectionFlags.IMAGE_SCN_MEM_NOT_CACHED) > 0)
{
protect |= NativeDeclarations.PAGE_NOCACHE;
}
size = section->SizeOfRawData;
if (size == 0)
{
if ((section->Characteristics & (uint)ImageSectionContains.INITIALIZED_DATA) > 0)
{
size = this.headers->OptionalHeader.SizeOfInitializedData;
}
else if ((section->Characteristics & (uint)ImageSectionContains.UNINITIALIZED_DATA) > 0)
{
size = this.headers->OptionalHeader.SizeOfUninitializedData;
}
}
if (size > 0)
{
if (!NativeDeclarations.VirtualProtect(new IntPtr(section->PhysicalAddress | (uint)imageOffset), size, protect, out oldProtect))
{
throw new Win32Exception("Can't change section access rights");
}
}
}
}
