예제 #1
0
void DisassemblyFunction::load()
{
	generateBranchLines();

	// gather all branch targets
	std::set<u32> branchTargets;
	for (size_t i = 0; i < lines.size(); i++)
	{
		switch (lines[i].type)
		{
		case LINE_DOWN:
			branchTargets.insert(lines[i].second);
			break;
		case LINE_UP:
			branchTargets.insert(lines[i].first);
			break;
		default:
			break;
		}
	}
	
	DebugInterface* cpu = DisassemblyManager::getCpu();
	u32 funcPos = address;
	u32 funcEnd = address+size;

	u32 nextData = symbolMap.GetNextSymbolAddress(funcPos-1,ST_DATA);
	u32 opcodeSequenceStart = funcPos;
	while (funcPos < funcEnd)
	{
		if (funcPos == nextData)
		{
			if (opcodeSequenceStart != funcPos)
				addOpcodeSequence(opcodeSequenceStart,funcPos);

			DisassemblyData* data = new DisassemblyData(funcPos,symbolMap.GetDataSize(funcPos),symbolMap.GetDataType(funcPos));
			entries[funcPos] = data;
			lineAddresses.push_back(funcPos);
			funcPos += data->getTotalSize();

			nextData = symbolMap.GetNextSymbolAddress(funcPos-1,ST_DATA);
			opcodeSequenceStart = funcPos;
			continue;
		}

		// force align
		if (funcPos % 4)
		{
			u32 nextPos = (funcPos+3) & ~3;

			DisassemblyComment* comment = new DisassemblyComment(funcPos,nextPos-funcPos,".align","4");
			entries[funcPos] = comment;
			lineAddresses.push_back(funcPos);
			
			funcPos = nextPos;
			opcodeSequenceStart = funcPos;
			continue;
		}

		MIPSAnalyst::MipsOpcodeInfo opInfo = MIPSAnalyst::GetOpcodeInfo(cpu,funcPos);
		u32 opAddress = funcPos;
		funcPos += 4;

		// skip branches and their delay slots
		if (opInfo.isBranch)
		{
			funcPos += 4;
			continue;
		}

		// lui
		if (MIPS_GET_OP(opInfo.encodedOpcode) == 0x0F && funcPos < funcEnd && funcPos != nextData)
		{
			MIPSOpcode next = Memory::Read_Instruction(funcPos);
			MIPSInfo nextInfo = MIPSGetInfo(next);

			u32 immediate = ((opInfo.encodedOpcode & 0xFFFF) << 16) + (s16)(next.encoding & 0xFFFF);
			int rt = MIPS_GET_RT(opInfo.encodedOpcode);

			int nextRs = MIPS_GET_RS(next.encoding);
			int nextRt = MIPS_GET_RT(next.encoding);

			// both rs and rt of the second op have to match rt of the first,
			// otherwise there may be hidden consequences if the macro is displayed.
			// also, don't create a macro if something branches into the middle of it
			if (nextRs == rt && nextRt == rt && branchTargets.find(funcPos) == branchTargets.end())
			{
				DisassemblyMacro* macro = NULL;
				switch (MIPS_GET_OP(next.encoding))
				{
				case 0x09:	// addiu
					macro = new DisassemblyMacro(opAddress);
					macro->setMacroLi(immediate,rt);
					funcPos += 4;
					break;
				case 0x20:	// lb
				case 0x21:	// lh
				case 0x23:	// lw
				case 0x24:	// lbu
				case 0x25:	// lhu
				case 0x28:	// sb
				case 0x29:	// sh
				case 0x2B:	// sw
					macro = new DisassemblyMacro(opAddress);
					
					int dataSize;
					switch (nextInfo & MEMTYPE_MASK) {
					case MEMTYPE_BYTE:
						dataSize = 1;
						break;
					case MEMTYPE_HWORD:
						dataSize = 2;
						break;
					case MEMTYPE_WORD:
					case MEMTYPE_FLOAT:
						dataSize = 4;
						break;
					case MEMTYPE_VQUAD:
						dataSize = 16;
						break;
					default:
						return;
					}

					macro->setMacroMemory(MIPSGetName(next),immediate,rt,dataSize);
					funcPos += 4;
					break;
				}

				if (macro != NULL)
				{
					if (opcodeSequenceStart != opAddress)
						addOpcodeSequence(opcodeSequenceStart,opAddress);

					entries[opAddress] = macro;
					for (int i = 0; i < macro->getNumLines(); i++)
					{
						lineAddresses.push_back(macro->getLineAddress(i));
					}

					opcodeSequenceStart = funcPos;
					continue;
				}
			}
		}

		// just a normal opcode
	}

	if (opcodeSequenceStart != funcPos)
		addOpcodeSequence(opcodeSequenceStart,funcPos);
}
예제 #2
0
void DisassemblyFunction::load()
{
	generateBranchLines();

	// gather all branch targets
	std::set<u32> branchTargets;
	for (size_t i = 0; i < lines.size(); i++)
	{
		switch (lines[i].type)
		{
		case LINE_DOWN:
			branchTargets.insert(lines[i].second);
			break;
		case LINE_UP:
			branchTargets.insert(lines[i].first);
			break;
		}
	}
	
	u32 funcPos = address;
	u32 funcEnd = address+size;

	u32 nextData = symbolMap.GetNextSymbolAddress(funcPos-1,ST_DATA);
	u32 opcodeSequenceStart = funcPos;
	while (funcPos < funcEnd)
	{
		if (funcPos == nextData)
		{
			if (opcodeSequenceStart != funcPos)
				addOpcodeSequence(opcodeSequenceStart,funcPos);

			DisassemblyData* data = new DisassemblyData(cpu,funcPos,symbolMap.GetDataSize(funcPos),symbolMap.GetDataType(funcPos));
			entries[funcPos] = data;
			lineAddresses.push_back(funcPos);
			funcPos += data->getTotalSize();

			nextData = symbolMap.GetNextSymbolAddress(funcPos-1,ST_DATA);
			opcodeSequenceStart = funcPos;
			continue;
		}

		// force align
		if (funcPos % 4)
		{
			u32 nextPos = (funcPos+3) & ~3;

			DisassemblyComment* comment = new DisassemblyComment(cpu,funcPos,nextPos-funcPos,".align","4");
			entries[funcPos] = comment;
			lineAddresses.push_back(funcPos);
			
			funcPos = nextPos;
			opcodeSequenceStart = funcPos;
			continue;
		}

		MIPSAnalyst::MipsOpcodeInfo opInfo = MIPSAnalyst::GetOpcodeInfo(cpu,funcPos);
		u32 opAddress = funcPos;
		funcPos += 4;
		
		// skip branches and their delay slots
		if (opInfo.isBranch)
		{
			funcPos += 4;
			continue;
		}
		
		// lui
		if (MIPS_GET_OP(opInfo.encodedOpcode) == 0x0F && funcPos < funcEnd && funcPos != nextData)
		{
			u32 next = cpu->read32(funcPos);

			u32 immediate = ((opInfo.encodedOpcode & 0xFFFF) << 16) + (s16)(next & 0xFFFF);
			u32 immediateOr = ((opInfo.encodedOpcode & 0xFFFF) << 16) | (u16)(next & 0xFFFF);
			int rt = MIPS_GET_RT(opInfo.encodedOpcode);

			int nextRs = MIPS_GET_RS(next);
			int nextRt = MIPS_GET_RT(next);

			// both rs and rt of the second op have to match rt of the first,
			// otherwise there may be hidden consequences if the macro is displayed.
			// also, don't create a macro if something branches into the middle of it
			if (nextRs == rt && nextRt == rt && branchTargets.find(funcPos) == branchTargets.end())
			{
				DisassemblyMacro* macro = NULL;
				switch (MIPS_GET_OP(next))
				{
				case 0x09:	// addiu
					macro = new DisassemblyMacro(cpu,opAddress);
					macro->setMacroLi(immediate,rt);
					funcPos += 4;
					break;
				case 0x0D:	// ori
					macro = new DisassemblyMacro(cpu,opAddress);
					macro->setMacroLi(immediateOr,rt);
					funcPos += 4;
					break;
				case 0x20:	// lb
					macro = new DisassemblyMacro(cpu,opAddress);
					macro->setMacroMemory("lb",immediate,rt,1);
					funcPos += 4;
					break;
				case 0x21:	// lh
					macro = new DisassemblyMacro(cpu,opAddress);
					macro->setMacroMemory("lh",immediate,rt,2);
					funcPos += 4;
					break;
				case 0x23:	// lw
					macro = new DisassemblyMacro(cpu,opAddress);
					macro->setMacroMemory("lw",immediate,rt,4);
					funcPos += 4;
					break;
				case 0x24:	// lbu
					macro = new DisassemblyMacro(cpu,opAddress);
					macro->setMacroMemory("lbu",immediate,rt,1);
					funcPos += 4;
					break;
				case 0x25:	// lhu
					macro = new DisassemblyMacro(cpu,opAddress);
					macro->setMacroMemory("lhu",immediate,rt,2);
					funcPos += 4;
					break;
				case 0x28:	// sb
					macro = new DisassemblyMacro(cpu,opAddress);
					macro->setMacroMemory("sb",immediate,rt,1);
					funcPos += 4;
					break;
				case 0x29:	// sh
					macro = new DisassemblyMacro(cpu,opAddress);
					macro->setMacroMemory("sh",immediate,rt,2);
					funcPos += 4;
				case 0x2B:	// sw
					macro = new DisassemblyMacro(cpu,opAddress);
					macro->setMacroMemory("sw",immediate,rt,4);
					funcPos += 4;
					break;
				}

				if (macro != NULL)
				{
					if (opcodeSequenceStart != opAddress)
						addOpcodeSequence(opcodeSequenceStart,opAddress);

					entries[opAddress] = macro;
					for (int i = 0; i < macro->getNumLines(); i++)
					{
						lineAddresses.push_back(macro->getLineAddress(i));
					}

					opcodeSequenceStart = funcPos;
					continue;
				}
			}
		}

		// just a normal opcode
	}

	if (opcodeSequenceStart != funcPos)
		addOpcodeSequence(opcodeSequenceStart,funcPos);
}