On Thu, Jul 31, 1997 at 04:59:08PM -0400, John Kohl wrote:
> When last I cared (2 years ago), kernel remote serial debugging on i386
> didn't work.  Does it work now?  Anybody got sample configurations?

Yes, it works now. Sample: if the machine that you want to debug has
a serial line going from com1 (in NetBSD terms, not DOS), to com3 on
the other one, and your speed is 38400 bps:

 - compile a kernel with:
  - makeoptions DEBUG="-g"
  - options KGDB, KGDBDEV=0x0801, KGDBRATE=38400
    ^^^^^^^^^^^^^^
    makedev(commajor, 1)

 - boot that kernel on the machine that you want to debug.
   use the -d option when booting to have it drop into kgdb
   right away.

 - on the other machine (assuming that you did the compiling there),
   go into the compile dir for the kernel on the other machine
   and do:
  - you should probably have 'softcar' set for the serial line
  - gdb
  - file netbsd.gdb
  - set remotebaud 38400
  - target remote /dev/tty03

..and you should be in business.

- Frank