I'm trying to set up a virtualised qemu OpenBSD kernel debug
environment, with a reasonable amount of success, but am running into
the following problem on bootup :
com1: at isa0 port 0x2f8/8 irq 3panic: com_isa_attach: mapping failed
The operating system has halted
Presumably because the kernel debugger is already using it (it attaches
fine after the initial boot -d). I note that in a non debug kernel it's
referring to pccom instead of straight com... I imagine I'm doing
something wrong?
My kernel config file is :
include "arch/i386/conf/GENERIC"
rmoption DDB
makeoptions DEBUG="-g"
option KGDB
option "KGDB_DEVNAME=\"com\"",KGDBADDR=0x2f8,KGDBRATE=19200
/etc/ttys has
tty01 "/usr/libexec/getty std.19200" unknown off local
(but it's not getting that far, is it?).
Do I need to rebuild the kernel with
option "KGDB_DEVNAME=\"pccom\"",KGDBADDR=0x2fs,KGDBRATE=19200
Perhaps? Or is this a virtualisation issue? I'm using qemu 0.91 under
Vista x64 with redirected serial ports (-serial tcp:<binding IP
address>:<port>,server,nowait)
Thanks!
PK
