internal override void Hack_ReturnNull(Inferior inferior)
{
Registers regs = inferior.GetRegisters();
TargetAddress rsp = new TargetAddress(
inferior.AddressDomain, regs [(int)X86_Register.RSP].GetValue());
TargetAddress rip = inferior.ReadAddress(rsp);
rsp += TargetAddressSize;
regs [(int)X86_Register.RIP].SetValue(rip);
regs [(int)X86_Register.RSP].SetValue(rsp);
regs [(int)X86_Register.RAX].SetValue(TargetAddress.Null);
inferior.SetRegisters(regs);
}
public override bool InterpretInstruction(Inferior inferior)
{
switch (InstructionType)
{
case Type.IndirectJump:
case Type.Jump: {
TargetAddress target = GetEffectiveAddress(inferior);
Registers regs = inferior.GetRegisters();
regs [(int)X86_Register.RIP].SetValue(target);
inferior.SetRegisters(regs);
return(true);
}
case Type.IndirectCall:
case Type.Call: {
TargetAddress target = GetEffectiveAddress(inferior);
Registers regs = inferior.GetRegisters();
TargetAddress rip = new TargetAddress(
inferior.AddressDomain, regs [(int)X86_Register.RIP].Value);
TargetAddress rsp = new TargetAddress(
inferior.AddressDomain, regs [(int)X86_Register.RSP].Value);
inferior.WriteAddress(rsp - 8, rip + InstructionSize);
regs [(int)X86_Register.RSP].SetValue(rsp - 8);
regs [(int)X86_Register.RIP].SetValue(target);
inferior.SetRegisters(regs);
return(true);
}
case Type.Ret: {
Registers regs = inferior.GetRegisters();
TargetAddress rsp = new TargetAddress(
inferior.AddressDomain, regs [(int)X86_Register.RSP].Value);
TargetAddress rip = inferior.ReadAddress(rsp);
rsp += 8 + Displacement;
regs [(int)X86_Register.RSP].SetValue(rsp);
regs [(int)X86_Register.RIP].SetValue(rip);
inferior.SetRegisters(regs);
return(true);
}
case Type.Interpretable: {
Registers regs = inferior.GetRegisters();
TargetAddress rsp = new TargetAddress(
inferior.AddressDomain, regs [(int)X86_Register.RSP].Value);
TargetAddress rbp = new TargetAddress(
inferior.AddressDomain, regs [(int)X86_Register.RBP].Value);
TargetAddress rip = new TargetAddress(
inferior.AddressDomain, regs [(int)X86_Register.RIP].Value);
if (Code [0] == 0x55) /* push %rbp */
{
inferior.WriteAddress(rsp - 8, rbp);
regs [(int)X86_Register.RSP].SetValue(rsp - 8);
regs [(int)X86_Register.RIP].SetValue(rip + 1);
inferior.SetRegisters(regs);
return(true);
}
return(false);
}
default:
return(false);
}
}
