Re: how to jump into ddb console from a serial terminal ?

[Thierry Deval <TDeval@PrimeOBJ.COM>]

On mercredi, août 1, 2001, at 03:57 , Hugh Graham wrote:

> On Wed, Aug 01, 2001 at 03:40:18PM +0200, Thierry Deval wrote:
>>
>> I would have sworn I did try that break sequence to no avail before...
>> To be sure, I tried this again, same result : the sequence '\n~#' gives
>> me a ~ and a "break", that is canceling the previous input and offers 
>> me
>> a new input line, whether it's in a shell or at the login prompt.
>>
>> BTW I have
>> ddb.panic=0
>> ddb.console=1
>>
>> Did anyone manage to do it ?
>> Do the serial ports need to be configured in a specific way ?
>>
>
> Just to caution, the sequence "\n~#" is intended to read:
> "hit the enter key, hit the tilde key, hit the octothorpe key"
> The newline is needed so you can type tilde elsewhere without tip
> getting in your way all the time.
>
> You do have ddb.console set, and your dmesg (thanks) shows that you
> have indeed booted with com0 as serial console.
>
> The relevant code in pccom.c is:
>
>                 if (ISSET(lsr, LSR_BI)) {
> #ifdef DDB
>                         if (ISSET(sc->sc_hwflags, COM_HW_CONSOLE)) {
>                                 if (db_console)
>                                         Debugger();
>
> The "break indicator" is actually a hardware condition, and everything
> else you describe seems to pass the tests shown here. It should work!
> Perhaps try cu?
>

Thanks Hugh,

You know what ?
It didn't occur to me that it was necessary for the boot console to be 
setup on tty00/com0. That works !

I was previously hooked to tty01/com1 :-(
Wouldn't it be good to have the DDB access on ANY device set as the 
console ? Bah, doesn't matter anymore now.

Many thanks,

   Thierry