Re: command targe child question , help needed!!

[Daniel Jacobowitz <drow at mvista dot com>]

On Mon, Mar 03, 2003 at 02:55:03PM +0100, msarasa at fh-konstanz dot de wrote:
> Zitat von Daniel Jacobowitz <drow at mvista dot com>:
> 
> > On Mon, Mar 03, 2003 at 11:02:00AM +0100, msarasa at fh-konstanz dot de wrote:
> > > 
> > > I think this is the right command I have to use in order to connect gdb
> > with 
> > > an external proccess. As said in the help.
> > > But , this is my case: 
> > > I've made a simulator of a whole board with it's processor. I can run it as
> > a 
> > > process , and I want to know a little bit more about how to connect that
> > with 
> > > gdb. In the documentation there's no more said about how does target child
> > 
> > > work , and I would like to know, if it's possible , the way this command 
> > > works. 
> > > The format of the packets in this communication, the way I have to use it,
> > and 
> > > how exactly should I modify a program that reads from a simulated UART, to
> > 
> > > take the outputs from the gnu.
> > > It's REALLY important for me a little help with this. If I should explain
> > more 
> > > about the simulator or the problem , please tell me!! but answer me
> > anyway!!
> > > 
> > > I'm totally stopped at this point.
> > 
> > Target child is what you would use to debug the simulator.  If you
> > want to debug the simulated processor, then you probably want to
> > support the remote protocol in the simulator and use "target
> > remote".
> > 
> > -- 
> > Daniel Jacobowitz
> > MontaVista Software                         Debian GNU/Linux Developer
> > 
> 
> This is what I have:
> A gnu development that debugs an architecture. That is , gnu that communicates 
> with a physical external board with a hyperstone E1 chip , via serial link.
> I have too a simulator that acts exactly as this board. It reads/writes its 
> input/output in a simulated UART. I can chage this to reading/writing 
> elsewhere, but, i don't know exactly how to connect this with the gdb serial 
> protocol. Should I modify gdb code, or should I use a specific command. I 
> thought I could use the target child command to tell the gnu to communicate 
> not to the board but to the board simulator process. But maybe I din't 
> understand that properly as English is not my languange. 
> I think , there are two functions called send_pkt and read_pakt (or similar) 
> that I could modify too to force gnu to read/write in a virtual UART. 
> But if it's possible I would like to use an option from this target command to 
> communicate my simulator program with the gdb.
> 
> Sorry for my english , I'll hope you could understand all. Thank you very much 
> for your answer!!!
> Best regards! miguel

See my previous answer.  Your simulator must support a GDB "remote"
protocol in order to do this (or RDI, etc.).

-- 
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer