Method ParseEHFrameData

IDEHelper/DbgModule.cpp:4607–4737

}

void DbgModule::ParseEHFrameData()
{
	const uint8* data = mEHFrameData;
	if (data == NULL)
		return;

	Dictionary<addr_target, DwCommonFrameDescriptor*> commonFrameDescriptorMap;

	while (true)
	{
		addr_target sectionAddress = (addr_target)(data - mEHFrameData);

		int length = GET(int);
		if (length == 0)
			break;

		const uint8* dataEnd = data + length;

		int cieID = GET(int);
		if (cieID <= 0)
		{
			BP_ALLOC_T(DwCommonFrameDescriptor);
			DwCommonFrameDescriptor* commonFrameDescriptor = mAlloc.Alloc<DwCommonFrameDescriptor>();

			char version = GET(char);
			const char* augmentation = DataGetString(data);

			commonFrameDescriptor->mDbgModule = this;
			commonFrameDescriptor->mCodeAlignmentFactor = (int)DecodeULEB128(data);
			commonFrameDescriptor->mDataAlignmentFactor = (int)DecodeSLEB128(data);
			commonFrameDescriptor->mReturnAddressColumn = (int)DecodeULEB128(data);
			commonFrameDescriptor->mAugmentation = augmentation;

			if (*augmentation == 'z')
			{
				++augmentation;
				int augLen = (int)DecodeULEB128(data);
				commonFrameDescriptor->mAugmentationLength = augLen;
				const uint8* augEnd = data + augLen;
				while (*augmentation != '\0')
				{
					if (*augmentation == 'R')
						commonFrameDescriptor->mAddressPointerEncoding = (int) GET(uint8);
					else if (*augmentation == 'P')
					{
						int encodingType = GET(uint8);
						BF_ASSERT(encodingType == 0);
						commonFrameDescriptor->mLSDARoutine = GET(addr_target);
					}
					else if (*augmentation == 'L')
						commonFrameDescriptor->mLSDAPointerEncodingFDE = GET(uint8);
					else if (*augmentation == 'S')
					{
						// mIsSignalHandler - on return from stack frame, CFA is before next instruction rather than after it
					}
					else
						BF_FATAL("Unknown CIE augmentation");
					++augmentation;