[Qemu-devel] Add native debugger

[Rick Hodgin]

For i386, I'm considering writing a native debugger for QEMU that is not GDB. 
It would allow a separate/new windowed interface which would show disassembly, 
registers, stack, local variables, memory windows, etc., allowing the user to 
single-step through code and trap opcodes like INT 1, INT 3, INT 4, etc.  It 
would be invoked with something like "qemu -debugger" from the command line, 
and would have a UI similar to Microsoft's Debugger in Visual Studio when no 
PDB is available, but would show a similar type of disassembly form.

I was looking at the QEMU code and I can't find an obvious place where it seems 
to iterate through each CPU instruction, which is where I had in mind to add a 
hook.

Can someone get me pointed in the right direction?  Where will I look for 
something like this:

for (;;)
{
  execute_next_instruction();
}

Thanks and best regards,
Rick C. Hodgin