bool IA_IAPI::savesFP() const
{
std::vector<Instruction::Ptr> insns;
insns.push_back(curInsn());
#if defined(os_windows)
// Windows functions can start with a noop...
InstructionDecoder tmp(dec);
insns.push_back(tmp.decode());
#endif
for (unsigned i = 0; i < insns.size(); ++i) {
InstructionAPI::Instruction::Ptr ci = insns[i];
if(ci->getOperation().getID() == e_push)
{
if (ci->isRead(framePtr[_isrc->getArch()])) {
return true;
}
else return false;
}
}
return false;
}
bool IA_powerDetails::scanForAdjustOrBase(IA_IAPI::allInsns_t::const_iterator start,
IA_IAPI::allInsns_t::const_iterator end,
RegisterAST::Ptr &jumpAddrReg) {
std::set<RegisterAST::Ptr> scratchRegs;
std::set<RegisterAST::Ptr> loadRegs;
loadRegs.insert(jumpAddrReg);
for (; start != end; --start) {
InstructionAPI::Instruction::Ptr insn = start->second;
parsing_printf("\t\t Examining 0x%lx / %s\n",
start->first, start->second->format().c_str());
if ((insn->getOperation().getID() == power_op_ld ||
insn->getOperation().getID() == power_op_ldx) &&
insn->isWritten(jumpAddrReg)) {
scratchRegs.clear();
insn->getReadSet(scratchRegs);
loadRegs.insert(scratchRegs.begin(), scratchRegs.end());
parsing_printf("Found a load; now have %d load regs\n", loadRegs.size());
}
else if(insn->getOperation().getID() == power_op_addi &&
!foundAdjustEntry) {
parsing_printf("Found add immediate (%d load regs)...\n", loadRegs.size());
scratchRegs.clear();
insn->getWriteSet(scratchRegs);
bool found = false;
// This is apparently broken
for (std::set<RegisterAST::Ptr>::iterator iter = loadRegs.begin(); iter != loadRegs.end(); ++iter) {
RegisterAST *tmp = (*iter).get();
RegisterAST *cmp = (*(scratchRegs.begin())).get();
if (*tmp == *cmp) {
found = true;
break;
}
}
if (!found) continue;
parsing_printf("... that adds to a load reg\n");
foundAdjustEntry = true;
toc_visitor->clear();
parsing_printf("... with operand %s\n", insn->getOperand(1).format(insn->getArch(), start->first).c_str());
insn->getOperand(1).getValue()->apply(toc_visitor.get());
adjustEntry = toc_visitor->result;
if (!adjustEntry)
insn->getOperand(2).getValue()->apply(toc_visitor.get());
adjustEntry = toc_visitor->result;
}
else if((insn->getOperation().getID() == power_op_lwz ||
insn->getOperation().getID() == power_op_ld) &&
insn->isRead(toc_reg) &&
insn->isWritten(jumpAddrReg))
{
parsing_printf("\t found TOC load at %s\n", insn->format().c_str());
toc_visitor->clear();
insn->getOperand(1).getValue()->apply(toc_visitor.get());
tableStartAddress = toc_visitor->result;
break;
}
}
return true;
}