uint8_t CFIWalker::processMixedInstr(void* opaque, int (*mapRegisterNumber)(void*, int), uint8_t instr)
{
int origRegNo = int(instr) & 0x3f;
int newRegNo = mapRegisterNumber(opaque, origRegNo);
if (origRegNo != newRegNo)
return (uint8_t) (instr & 0xC0) | newRegNo;
else
return instr;
}
void CFIWalker::processNextReg(void* opaque, int (*mapRegisterNumber)(void*, int))
{
uint64_t reg, newReg;
reg = m_buffer.readULEB128();
newReg = mapRegisterNumber(opaque, reg);
if (newReg != reg)
{
LOG << "Updating register number: " << reg << " -> " << newReg << std::endl;
m_buffer.updateLastULEB128(newReg);
}
}
uint8_t CFIWalker::processMixedInstr(void* opaque, int (*mapRegisterNumber)(void*, int), uint8_t instr)
{
int origRegNo = int(instr) & 0x3f;
int newRegNo = mapRegisterNumber(opaque, origRegNo);
if (origRegNo != newRegNo)
{
LOG << "Updating mixed instr. register number: " << origRegNo << " -> " << newRegNo << std::endl;
return (uint8_t) (instr & 0xC0) | (newRegNo & 0x3f);
}
else
return instr;
}