gdbstub initial code, v9

[Oleg Nesterov]

On 09/09, Oleg Nesterov wrote:
>
> the tracee hits this bp and reports SIGTRAP
>
> 	=> vStopped
> 	<= OK
> 	=> g
> 	<= 00000000000000000006400000000000401f207d007f000000000000000000...
> 	=> P10=ba05400000000000
> 	<=
> 	=> G00000000000000000006400000000000401f207d007f00000000000000000...
> 	<=

May be this can explain...

Probably I need to implement G/P first, otherwise gdb can't change ip.

Still, I'd appreciate if someone can explain me what gdb needs/expects
to handle breakpoints before I start to read the sources.

Oleg.