public void Dispose()
{
if(this.memmap != null)
this.memmap.Dispose();
this.memmap = null;
//this.cursor = null;
this.sectionHeaders = null;
this.identifierStringHeap = null;
this.generalStringHeap = null;
this.blobHeap = null;
this.guidHeap = null;
this.tables = null;
this.tablesHeader = null;
this.targetRuntimeVersion = null;
this.tableSize = null;
this.tableRefSize = null;
this.tableOffset = null;
this.HashValue = null;
}
private void ReadHeader()
{ //TODO: break up this method
MemoryCursor c = this.cursor;
c.Position = 0;
ReadDOSHeader(c);
NTHeader ntHeader = ReadNTHeader(c);
this.linkerMajorVersion = ntHeader.majorLinkerVersion;
this.linkerMinorVersion = ntHeader.minorLinkerVersion;
this.fileAlignment = ntHeader.fileAlignment;
if ((ntHeader.characteristics & 0x2000) != 0)
this.moduleKind = ModuleKind.DynamicallyLinkedLibrary;
else
this.moduleKind = ntHeader.subsystem == 0x3 ? ModuleKind.ConsoleApplication : ModuleKind.WindowsApplication;
int sectionCount = ntHeader.numberOfSections;
SectionHeader[] sectionHeaders = this.sectionHeaders = new SectionHeader[sectionCount];
int resourceSectionIndex = -1;
for (int i = 0; i < sectionCount; i++)
{
sectionHeaders[i] = ReadSectionHeader(c);
if (sectionHeaders[i].name == ".rsrc") resourceSectionIndex = i;
}
if (resourceSectionIndex >= 0)
this.win32ResourcesOffset = sectionHeaders[resourceSectionIndex].pointerToRawData;
else
this.win32ResourcesOffset = -1;
DirectoryEntry de = ntHeader.cliHeaderTable;
int cliHeaderOffset = this.RvaToOffset(de.virtualAddress);
c.Position = cliHeaderOffset;
CLIHeader cliHeader = ReadCLIHeader(c);
this.entryPointToken = cliHeader.entryPointToken;
if ((cliHeader.flags & 1) != 0)
this.peKind = PEKindFlags.ILonly;
if ((cliHeader.flags & 0x10) != 0)
this.entryPointToken = 0; //Native entry point. Ignore.
switch (ntHeader.machine)
{
case 0x0200:
this.peKind |= PEKindFlags.Requires64bits;
break;
case 0x8664:
this.peKind |= PEKindFlags.Requires64bits | PEKindFlags.AMD;
break;
default:
if (ntHeader.magic == 0x20B) //Optional header magic for PE32+
this.peKind |= PEKindFlags.Requires64bits;
else if ((cliHeader.flags & 2) != 0)
this.peKind |= PEKindFlags.Requires32bits;
break;
}
this.TrackDebugData = (cliHeader.flags & 0x10000) != 0;
if (cliHeader.resources.size > 0)
this.resourcesOffset = this.RvaToOffset(cliHeader.resources.virtualAddress);
int snSize = cliHeader.strongNameSignature.size;
if (snSize > 0)
{
long hashOffset = this.RvaToOffset(cliHeader.strongNameSignature.virtualAddress);
c.Position = (int)hashOffset;
this.HashValue = c.ReadBytes(snSize);
bool zeroHash = true;
for (int i = 0; i < snSize; i++) if (this.HashValue[i] != 0) zeroHash = false;
if (zeroHash) this.HashValue = null; //partially signed assembly
}
long mdOffset = this.mdOffset = this.RvaToOffset(cliHeader.metaData.virtualAddress);
c.Position = (int)mdOffset;
MetadataHeader mdHeader = ReadMetadataHeader(c);
this.targetRuntimeVersion = mdHeader.versionString;
foreach (StreamHeader sheader in mdHeader.streamHeaders)
{
//^ assume sheader != null;
switch (sheader.name)
{
case "#Strings": this.identifierStringHeap = sheader; continue;
case "#US": this.generalStringHeap = sheader; continue;
case "#Blob": this.blobHeap = sheader; continue;
case "#GUID": this.guidHeap = sheader; continue;
case "#~": this.tables = sheader; continue;
case "#-": this.tables = sheader; continue;
default: continue;
}
}
if (this.tables == null) throw new InvalidMetadataException(ExceptionStrings.NoMetadataStream);
c.Position = (int)(mdOffset + this.tables.offset);
TablesHeader tablesHeader = this.tablesHeader = ReadTablesHeader(c);
this.metadataFormatMajorVersion = tablesHeader.majorVersion;
this.metadataFormatMinorVersion = tablesHeader.minorVersion;
int[] tableSize = this.tableSize = new int[(int)TableIndices.Count];
int[] tableRefSize = this.tableRefSize = new int[(int)TableIndices.Count];
long valid = tablesHeader.maskValid;
int[] countArray = tablesHeader.countArray;
//^ assume countArray != null;
for (int i = 0, j = 0; i < (int)TableIndices.Count; i++)
{
if (valid % 2 == 1)
{
int m = tableSize[i] = countArray[j++];
tableRefSize[i] = m < 0x10000 ? 2 : 4;
}
else
tableRefSize[i] = 2;
valid /= 2;
}
int blobRefSize = this.blobRefSize = ((tablesHeader.heapSizes & 0x04) == 0 ? 2 : 4);
int constantParentRefSize = this.constantParentRefSize =
tableSize[(int)TableIndices.Param] < 0x4000 &&
tableSize[(int)TableIndices.Field] < 0x4000 &&
tableSize[(int)TableIndices.Property] < 0x4000 ? 2 : 4;
int customAttributeParentRefSize = 0;
if (this.metadataFormatMajorVersion > 1 || this.metadataFormatMinorVersion > 0)
{
customAttributeParentRefSize = this.customAttributeParentRefSize =
tableSize[(int)TableIndices.Method] < 0x0800 &&
tableSize[(int)TableIndices.Field] < 0x0800 &&
tableSize[(int)TableIndices.TypeRef] < 0x0800 &&
tableSize[(int)TableIndices.TypeDef] < 0x0800 &&
tableSize[(int)TableIndices.Param] < 0x0800 &&
tableSize[(int)TableIndices.InterfaceImpl] < 0x0800 &&
tableSize[(int)TableIndices.MemberRef] < 0x0800 &&
tableSize[(int)TableIndices.Module] < 0x0800 &&
tableSize[(int)TableIndices.DeclSecurity] < 0x0800 &&
tableSize[(int)TableIndices.Property] < 0x0800 &&
tableSize[(int)TableIndices.Event] < 0x0800 &&
tableSize[(int)TableIndices.StandAloneSig] < 0x0800 &&
tableSize[(int)TableIndices.ModuleRef] < 0x0800 &&
tableSize[(int)TableIndices.TypeSpec] < 0x0800 &&
tableSize[(int)TableIndices.Assembly] < 0x0800 &&
tableSize[(int)TableIndices.File] < 0x0800 &&
tableSize[(int)TableIndices.ExportedType] < 0x0800 &&
tableSize[(int)TableIndices.ManifestResource] < 0x0800 &&
tableSize[(int)TableIndices.GenericParam] < 0x0800 &&
tableSize[(int)TableIndices.MethodSpec] < 0x0800 &&
tableSize[(int)TableIndices.GenericParamConstraint] < 0x0800 ? 2 : 4;
}
else
{
customAttributeParentRefSize = this.customAttributeParentRefSize =
tableSize[(int)TableIndices.Method] < 0x0800 &&
tableSize[(int)TableIndices.Field] < 0x0800 &&
tableSize[(int)TableIndices.TypeRef] < 0x0800 &&
tableSize[(int)TableIndices.TypeDef] < 0x0800 &&
tableSize[(int)TableIndices.Param] < 0x0800 &&
tableSize[(int)TableIndices.InterfaceImpl] < 0x0800 &&
tableSize[(int)TableIndices.MemberRef] < 0x0800 &&
tableSize[(int)TableIndices.Module] < 0x0800 &&
tableSize[(int)TableIndices.DeclSecurity] < 0x0800 &&
tableSize[(int)TableIndices.Property] < 0x0800 &&
tableSize[(int)TableIndices.Event] < 0x0800 &&
tableSize[(int)TableIndices.StandAloneSig] < 0x0800 &&
tableSize[(int)TableIndices.ModuleRef] < 0x0800 &&
tableSize[(int)TableIndices.TypeSpec] < 0x0800 &&
tableSize[(int)TableIndices.Assembly] < 0x0800 &&
tableSize[(int)TableIndices.File] < 0x0800 &&
tableSize[(int)TableIndices.ExportedType] < 0x0800 &&
tableSize[(int)TableIndices.ManifestResource] < 0x0800 ? 2 : 4;
}
int customAttributeConstructorRefSize = this.customAttributeConstructorRefSize =
tableSize[(int)TableIndices.Method] < 0x2000 &&
tableSize[(int)TableIndices.MemberRef] < 0x2000 ? 2 : 4;
int declSecurityParentRefSize = this.declSecurityParentRefSize =
tableSize[(int)TableIndices.TypeDef] < 0x4000 &&
tableSize[(int)TableIndices.Method] < 0x4000 &&
tableSize[(int)TableIndices.Assembly] < 0x4000 ? 2 : 4;
int fieldMarshalParentRefSize = this.fieldMarshalParentRefSize =
tableSize[(int)TableIndices.Field] < 0x8000 &&
tableSize[(int)TableIndices.Param] < 0x8000 ? 2 : 4;
int guidRefSize = this.guidRefSize = ((tablesHeader.heapSizes & 0x02) == 0 ? 2 : 4);
int hasSemanticRefSize = this.hasSemanticRefSize =
tableSize[(int)TableIndices.Event] < 0x8000 &&
tableSize[(int)TableIndices.Property] < 0x8000 ? 2 : 4;
int implementationRefSize = this.implementationRefSize =
tableSize[(int)TableIndices.File] < 0x4000 &&
tableSize[(int)TableIndices.AssemblyRef] < 0x4000 &&
tableSize[(int)TableIndices.ExportedType] < 0x4000 ? 2 : 4;
int methodDefOrRefSize = this.methodDefOrRefSize =
tableSize[(int)TableIndices.Method] < 0x8000 &&
tableSize[(int)TableIndices.MemberRef] < 0x8000 ? 2 : 4;
int memberRefParentSize = this.memberRefParentSize =
tableSize[(int)TableIndices.TypeDef] < 0x2000 &&
tableSize[(int)TableIndices.TypeRef] < 0x2000 &&
tableSize[(int)TableIndices.ModuleRef] < 0x2000 &&
tableSize[(int)TableIndices.Method] < 0x2000 &&
tableSize[(int)TableIndices.TypeSpec] < 0x2000 ? 2 : 4;
int memberForwardedRefSize = this.memberForwardedRefSize =
tableSize[(int)TableIndices.Field] < 0x8000 &&
tableSize[(int)TableIndices.Method] < 0x8000 ? 2 : 4;
int typeDefOrMethodDefSize = this.typeDefOrMethodDefSize =
tableSize[(int)TableIndices.TypeDef] < 0x8000 &&
tableSize[(int)TableIndices.Method] < 0x8000 ? 2 : 4;
int typeDefOrRefOrSpecSize = this.typeDefOrRefOrSpecSize =
tableSize[(int)TableIndices.TypeDef] < 0x4000 &&
tableSize[(int)TableIndices.TypeRef] < 0x4000 &&
tableSize[(int)TableIndices.TypeSpec] < 0x4000 ? 2 : 4;
int resolutionScopeRefSize = this.resolutionScopeRefSize =
tableSize[(int)TableIndices.Module] < 0x4000 &&
tableSize[(int)TableIndices.ModuleRef] < 0x4000 &&
tableSize[(int)TableIndices.AssemblyRef] < 0x4000 &&
tableSize[(int)TableIndices.TypeRef] < 0x4000 ? 2 : 4;
int stringRefSize = this.stringRefSize = ((tablesHeader.heapSizes & 0x01) == 0 ? 2 : 4);
int[] tableOffset = this.tableOffset = new int[(int)TableIndices.Count];
int offset = this.mdOffset + this.tables.offset + 24 + countArray.Length * 4;
for (int i = 0; i < (int)TableIndices.Count; i++)
{
int m = tableSize[i];
if (m == 0) continue;
tableOffset[i] = offset;
switch ((TableIndices)i)
{
case TableIndices.Module: offset += m * (2 + stringRefSize + 3 * guidRefSize); break;
case TableIndices.TypeRef: offset += m * (resolutionScopeRefSize + 2 * stringRefSize); break;
case TableIndices.TypeDef: offset += m * (4 + 2 * stringRefSize + typeDefOrRefOrSpecSize + tableRefSize[(int)TableIndices.Field] + tableRefSize[(int)TableIndices.Method]); break;
case TableIndices.FieldPtr: offset += m * (tableRefSize[(int)TableIndices.Field]); break;
case TableIndices.Field: offset += m * (2 + stringRefSize + blobRefSize); break;
case TableIndices.MethodPtr: offset += m * (tableRefSize[(int)TableIndices.Method]); break;
case TableIndices.Method: offset += m * (8 + stringRefSize + blobRefSize + tableRefSize[(int)TableIndices.Param]); break;
case TableIndices.ParamPtr: offset += m * (tableRefSize[(int)TableIndices.Param]); break;
case TableIndices.Param: offset += m * (4 + stringRefSize); break;
case TableIndices.InterfaceImpl: offset += m * (tableRefSize[(int)TableIndices.TypeDef] + typeDefOrRefOrSpecSize); break;
case TableIndices.MemberRef: offset += m * (memberRefParentSize + stringRefSize + blobRefSize); break;
case TableIndices.Constant: offset += m * (2 + constantParentRefSize + blobRefSize); break;
case TableIndices.CustomAttribute: offset += m * (customAttributeParentRefSize + customAttributeConstructorRefSize + blobRefSize); break;
case TableIndices.FieldMarshal: offset += m * (fieldMarshalParentRefSize + blobRefSize); break;
case TableIndices.DeclSecurity: offset += m * (2 + declSecurityParentRefSize + blobRefSize); break;
case TableIndices.ClassLayout: offset += m * (6 + tableRefSize[(int)TableIndices.TypeDef]); break;
case TableIndices.FieldLayout: offset += m * (4 + tableRefSize[(int)TableIndices.Field]); break;
case TableIndices.StandAloneSig: offset += m * (blobRefSize); break;
case TableIndices.EventMap: offset += m * (tableRefSize[(int)TableIndices.TypeDef] + tableRefSize[(int)TableIndices.Event]); break;
case TableIndices.EventPtr: offset += m * (tableRefSize[(int)TableIndices.Event]); break;
case TableIndices.Event: offset += m * (2 + stringRefSize + typeDefOrRefOrSpecSize); break;
case TableIndices.PropertyMap: offset += m * (tableRefSize[(int)TableIndices.TypeDef] + tableRefSize[(int)TableIndices.Property]); break;
case TableIndices.PropertyPtr: offset += m * (tableRefSize[(int)TableIndices.Property]); break;
case TableIndices.Property: offset += m * (2 + stringRefSize + blobRefSize); break;
case TableIndices.MethodSemantics: offset += m * (2 + tableRefSize[(int)TableIndices.Method] + hasSemanticRefSize); break;
case TableIndices.MethodImpl: offset += m * (tableRefSize[(int)TableIndices.TypeDef] + 2 * methodDefOrRefSize); break;
case TableIndices.ModuleRef: offset += m * (stringRefSize); break;
case TableIndices.TypeSpec: offset += m * (blobRefSize); break;
case TableIndices.ImplMap: offset += m * (2 + memberForwardedRefSize + stringRefSize + tableRefSize[(int)TableIndices.ModuleRef]); break;
case TableIndices.FieldRva: offset += m * (4 + tableRefSize[(int)TableIndices.Field]); break;
case TableIndices.EncLog: throw new InvalidMetadataException(ExceptionStrings.ENCLogTableEncountered);
case TableIndices.EncMap: throw new InvalidMetadataException(ExceptionStrings.ENCMapTableEncountered);
case TableIndices.Assembly: offset += m * (16 + blobRefSize + 2 * stringRefSize); break;
case TableIndices.AssemblyProcessor: offset += m * (4); break;
case TableIndices.AssemblyOS: offset += m * (12); break;
case TableIndices.AssemblyRef: offset += m * (12 + 2 * blobRefSize + 2 * stringRefSize); break;
case TableIndices.AssemblyRefProcessor: offset += m * (4 + tableRefSize[(int)TableIndices.AssemblyRef]); break;
case TableIndices.AssemblyRefOS: offset += m * (12 + tableRefSize[(int)TableIndices.AssemblyRef]); break;
case TableIndices.File: offset += m * (4 + stringRefSize + blobRefSize); break;
case TableIndices.ExportedType: offset += m * (8 + 2 * stringRefSize + implementationRefSize); break;
case TableIndices.ManifestResource: offset += m * (8 + stringRefSize + implementationRefSize); break;
case TableIndices.NestedClass: offset += m * (2 * tableRefSize[(int)TableIndices.TypeDef]); break;
case TableIndices.GenericParam:
if (this.metadataFormatMajorVersion == 1 && this.metadataFormatMinorVersion == 0)
offset += m * (6 + typeDefOrMethodDefSize + stringRefSize + typeDefOrRefOrSpecSize);
else if (this.metadataFormatMajorVersion == 1 && this.metadataFormatMinorVersion == 1)
offset += m * (4 + typeDefOrMethodDefSize + stringRefSize + typeDefOrRefOrSpecSize);
else
offset += m * (4 + typeDefOrMethodDefSize + stringRefSize);
break;
case TableIndices.MethodSpec: offset += m * (methodDefOrRefSize + blobRefSize); break;
case TableIndices.GenericParamConstraint: offset += m * (tableRefSize[(int)TableIndices.GenericParam] + typeDefOrRefOrSpecSize); break;
default: throw new InvalidMetadataException(ExceptionStrings.UnsupportedTableEncountered);
}
}
}
private static StreamHeader ReadStreamHeader(MemoryCursor/*!*/ c)
{
StreamHeader header = new StreamHeader();
header.offset = c.ReadInt32();
header.size = c.ReadInt32();
header.name = c.ReadASCII();
int n = header.name.Length + 1;
c.Position += (4 - (n % 4)) % 4;
return header;
}