static int CountCilInstructions(MemoryReader memReader) {
int count = 0;
while (memReader.NotEndOfBytes) {
count++;
OperationCode cilOpCode = memReader.ReadOpcode();
switch (cilOpCode) {
case OperationCode.Ldarg_S:
case OperationCode.Ldarga_S:
case OperationCode.Starg_S:
case OperationCode.Ldloc_S:
case OperationCode.Ldloca_S:
case OperationCode.Stloc_S:
case OperationCode.Ldc_I4_S:
case OperationCode.Br_S:
case OperationCode.Brfalse_S:
case OperationCode.Brtrue_S:
case OperationCode.Beq_S:
case OperationCode.Bge_S:
case OperationCode.Bgt_S:
case OperationCode.Ble_S:
case OperationCode.Blt_S:
case OperationCode.Bne_Un_S:
case OperationCode.Bge_Un_S:
case OperationCode.Bgt_Un_S:
case OperationCode.Ble_Un_S:
case OperationCode.Blt_Un_S:
case OperationCode.Leave_S:
case OperationCode.Unaligned_:
case OperationCode.No_:
memReader.SkipBytes(1);
break;
case OperationCode.Ldarg:
case OperationCode.Ldarga:
case OperationCode.Starg:
case OperationCode.Ldloc:
case OperationCode.Ldloca:
case OperationCode.Stloc:
memReader.SkipBytes(2);
break;
case OperationCode.Ldc_I4:
case OperationCode.Jmp:
case OperationCode.Call:
case OperationCode.Calli:
case OperationCode.Br:
case OperationCode.Brfalse:
case OperationCode.Brtrue:
case OperationCode.Beq:
case OperationCode.Bge:
case OperationCode.Bgt:
case OperationCode.Ble:
case OperationCode.Blt:
case OperationCode.Bne_Un:
case OperationCode.Bge_Un:
case OperationCode.Bgt_Un:
case OperationCode.Ble_Un:
case OperationCode.Blt_Un:
case OperationCode.Callvirt:
case OperationCode.Cpobj:
case OperationCode.Ldobj:
case OperationCode.Ldstr:
case OperationCode.Newobj:
case OperationCode.Castclass:
case OperationCode.Isinst:
case OperationCode.Unbox:
case OperationCode.Ldfld:
case OperationCode.Ldflda:
case OperationCode.Stfld:
case OperationCode.Ldsfld:
case OperationCode.Ldsflda:
case OperationCode.Stsfld:
case OperationCode.Stobj:
case OperationCode.Box:
case OperationCode.Newarr:
case OperationCode.Ldelema:
case OperationCode.Ldelem:
case OperationCode.Stelem:
case OperationCode.Unbox_Any:
case OperationCode.Refanyval:
case OperationCode.Mkrefany:
case OperationCode.Ldtoken:
case OperationCode.Leave:
case OperationCode.Ldftn:
case OperationCode.Ldvirtftn:
case OperationCode.Initobj:
case OperationCode.Constrained_:
case OperationCode.Sizeof:
case OperationCode.Ldc_R4:
memReader.SkipBytes(4);
break;
case OperationCode.Ldc_I8:
case OperationCode.Ldc_R8:
memReader.SkipBytes(8);
break;
case OperationCode.Switch:
int numTargets = (int)memReader.ReadUInt32();
memReader.SkipBytes(4*numTargets);
break;
default:
break;
}
}
memReader.SeekOffset(0);
return count;
}
bool ReadPEFileLevelData()
//^ requires this.ReaderState >= ReaderState.Initialized;
{
MemoryReader memReader = new MemoryReader(this.BinaryDocumentMemoryBlock.Pointer, this.BinaryDocumentMemoryBlock.Length);
if (memReader.RemainingBytes < PEFileConstants.BasicPEHeaderSize) {
this.ErrorContainer.AddBinaryError(0, MetadataReaderErrorKind.FileSizeTooSmall);
return false;
}
// Look for DOS Signature "MZ"
ushort dosSig = memReader.PeekUInt16(0);
if (dosSig != PEFileConstants.DosSignature) {
this.ErrorContainer.AddBinaryError(0, MetadataReaderErrorKind.DosHeader);
return false;
}
// Skip the DOS Header
int ntHeaderOffset = memReader.PeekInt32(PEFileConstants.PESignatureOffsetLocation);
if (!memReader.SeekOffset(ntHeaderOffset)) {
this.ErrorContainer.AddBinaryError(memReader.Offset, MetadataReaderErrorKind.FileSizeTooSmall);
return false;
}
// Look for PESignature "PE\0\0"
uint NTSignature = memReader.ReadUInt32();
if (NTSignature != PEFileConstants.PESignature) {
this.ErrorContainer.AddBinaryError(memReader.Offset - sizeof(uint), MetadataReaderErrorKind.PESignature);
return false;
}
// Read the COFF Header
if (!this.ReadCOFFFileHeader(ref memReader)) {
return false;
}
// Read the magic to determine if its PE or PE+
PEMagic magic = (PEMagic)memReader.PeekUInt16(0);
switch (magic) {
case PEMagic.PEMagic32:
if (
!this.ReadOptionalHeaderStandardFields32(ref memReader)
|| !this.ReadOptionalHeaderNTAdditionalFields32(ref memReader)
) {
return false;
}
break;
case PEMagic.PEMagic64:
if (
!this.ReadOptionalHeaderStandardFields64(ref memReader)
|| !this.ReadOptionalHeaderNTAdditionalFields64(ref memReader)
) {
return false;
}
break;
default:
this.ErrorContainer.AddBinaryError(memReader.Offset, MetadataReaderErrorKind.UnknownPEMagic);
return false;
}
if (!this.ReadOptionalHeaderDirectoryEntries(ref memReader)) {
return false;
}
if (!this.ReadSectionHeaders(ref memReader)) {
return false;
}
this.ReaderState = ReaderState.PEFile;
this.Win32ResourceMemoryReader = new MemoryReader(this.DirectoryToMemoryBlock(this.OptionalHeaderDirectoryEntries.ResourceTableDirectory));
return true;
}