void WriteFuncMissingStub(u32 stubAddr, u32 nid)
{
// Write a trap so we notice this func if it's called before resolving.
Memory::Write_U32(MIPS_MAKE_JR_RA(), stubAddr); // jr ra
Memory::Write_U32(GetSyscallOp(NULL, nid), stubAddr + 4);
}
void ScanForFunctions(u32 startAddr, u32 endAddr /*, std::vector<u32> knownEntries*/)
{
Function currentFunction = {startAddr};
u32 furthestBranch = 0;
bool looking = false;
bool end = false;
bool isStraightLeaf=true;
u32 addr;
for (addr = startAddr; addr<=endAddr; addr+=4)
{
int n = symbolMap.GetSymbolNum(addr,ST_FUNCTION);
if (n != -1)
{
addr = symbolMap.GetSymbolAddr(n) + symbolMap.GetSymbolSize(n);
continue;
}
u32 op = Memory::Read_Instruction(addr);
u32 target = GetBranchTarget(addr);
if (target != INVALIDTARGET)
{
isStraightLeaf = false;
if (target > furthestBranch)
{
furthestBranch = target;
}
}
if (op == MIPS_MAKE_JR_RA())
{
if (furthestBranch >= addr)
{
looking = true;
addr+=4;
}
else
{
end = true;
}
}
if (looking)
{
if (addr >= furthestBranch)
{
u32 sureTarget = GetSureBranchTarget(addr);
if (sureTarget != INVALIDTARGET && sureTarget < addr)
{
end = true;
}
sureTarget = GetJumpTarget(addr);
if (sureTarget != INVALIDTARGET && sureTarget < addr && ((op&0xFC000000)==0x08000000))
{
end = true;
}
//end = true;
}
}
if (end)
{
currentFunction.end = addr + 4;
currentFunction.isStraightLeaf = isStraightLeaf;
functions.push_back(currentFunction);
furthestBranch = 0;
addr += 4;
looking = false;
end = false;
isStraightLeaf=true;
currentFunction.start = addr+4;
}
}
currentFunction.end = addr + 4;
functions.push_back(currentFunction);
for (vector<Function>::iterator iter = functions.begin(); iter!=functions.end(); iter++)
{
(*iter).size = ((*iter).end-(*iter).start+4);
char temp[256];
sprintf(temp,"z_un_%08x",(*iter).start);
symbolMap.AddSymbol(std::string(temp).c_str(), (*iter).start,(*iter).end-(*iter).start+4,ST_FUNCTION);
}
HashFunctions();
}