public Disassembler(VM target)
: base("Disassembler", Handle.GetContextByID(target.HandleID).DeepCopy(), HandleParameters.DISASSEMBLE | HandleParameters.NOJMP | HandleParameters.NOBREAK)
{
// Target will hold a reference to the VM
Target = target;
// Create a new address range to disassemble(the loaded instructions)
Map = new AddressMap();
Map.AddRange(new AddressRange(Target.GetMemory().SegmentMap[".main"].Range.Start, Target.GetMemory().SegmentMap[".main"].Range.End));
// When the target VM calls flash(), the context reference will change, so it is necessary to listen for this and update accordingly.
target.Flash += UpdateTarget;
// When the target finishes execution, update the address marked as RIP and the new RIP.
target.RunComplete += (status) =>
{
// These conditions will only pass if the address is present. It would be perfectly normal for it not to,
// for example when all the instructions have been executed, $RIP is out of the disassembly.
if ((Map.Search(status.InitialRIP).Info | AddressMap.BinarySearchResult.ResultInfo.PRESENT) == Map.Search(status.InitialRIP).Info)
{
ToggleSetting(status.InitialRIP, AddressInfo.RIP);
}
if ((Map.Search(status.EndRIP).Info | AddressMap.BinarySearchResult.ResultInfo.PRESENT) == Map.Search(status.InitialRIP).Info)
{
ToggleSetting(status.EndRIP, AddressInfo.RIP);
}
};
// Listen for changes to breakpoints on the target VM.
target.Breakpoints.OnAdd += (addr, index) => ToggleSetting(addr, AddressInfo.BREAKPOINT);
target.Breakpoints.OnRemove += (addr, index) => ToggleSetting(addr, AddressInfo.BREAKPOINT);
}
public void ClearAddressRange()
{
// When clearing the range, make sure that the initial code segment is added back to the address ranges. This would be called
// for example when new instructions are loaded onto the VM. The disassembler will have to adjust the ranges it disassembled to
// match new code.
Map.Clear();
Map.AddRange(new AddressRange(Target.GetMemory().SegmentMap[".main"].Range.Start, Target.GetMemory().SegmentMap[".main"].Range.End));
}
