Re: kgdb 2.3 hangs

this time, it keep showing

Bad checksum, sentsum=0xc, csum=0x71,
buf=a0d208f9f5f6b73796d7461625f737472696e677300000000000000000000000000000acd508f95f5f6b73796d7461625f7706c0000000000000000000000
Packet instead of Ack, ignoring it
Bad checksum, sentsum=0xc, csum=0x79,
buf=a0d208f95f5f6b7796d7461625f737472696e677300000000000000000000000000000acd508f95f5f6b73796d7461625f67706c000000000000000000000
putpkt: Junk:
a0d208f95f5f6b73796d741625f737472696e67730000000000000000000000000000acd508f95f5f6b7379d7461625f67706c0000000000000000000000#0c
Packet instead of Ack, ignoring it
Bad checksum, sentsum=0xc, csum=0x44,
buf=a0d20895f5f6b73796d7461625f737472696e677300000000000000000000000000000acd508f95f5f6b73796d746165f67706c0000000000000000000000
Packet instead of Ack, ignoring it
Bad checksum, sentsum=0xc, csum=0x46,
buf=a0d208f95f56b73796d7461625f737472696e677300000000000000000000000000000acd508f95f5f6b73796d7461625f6776c0000000000000000000000
Packet instead of Ack, ignoring it
Bad checksum, sentsum=0xc, csum=0x73,
buf=a0d208f95f5f6b7376d7461625f737472696e677300000000000000000000000000000acd508f95f5f6b73796d7461625f67706c000000000000000000000
Packet instead of Ack, ignoring it
Bad checksum, sentsum=0xc, csum=0x7a,
buf=a0d208f95f5f6b73796d746165f737472696e677300000000000000000000000000000acd508f95f5f6b73796d7461625f67706c000000000000000000000
Packet instead of Ack, ignoring it
Bad checksum, sentsum=0xc, csum=0x70,
buf=a0d208f95f5f6b73796d7461625f73772696e6773000000000000000000000000000000acd50f95f5f6b73796d7461625f67706c000000000000000000000
Packet instead of Ack, ignoring it
self=Reply contains invalid hex digit 36

so is my baud rate wrong? i use 38400 since i thought 57600/115200 might
be too high.

if i do not insert modules, everything looks fine. so i am not sure why
serial port will perform badly just when insert modules. :)

ps, i use 'set solib-search-path /root/kgdb/module26' for kgdb to find
my modules.

i meet this randomly when i insert modules. sometime 1st one stuck,
sometime 2nd or 3rd module loading fail me.

Thanks!

Ming


On Fri, 2006-01-27 at 10:12 -0500, Ming Zhang wrote:
> thanks for the hint.
> 
> now i deselect the "console message over kgdb" and use this 'set debug
> remote 1', the boot process is good.
> 
> 
> now is another problem.
> 
> it hangs when loading module.
> 
> when load a module using insmod, target box hangs there.
> 
> kgdb shows
> 
> packet instead of Ack, ignoring it
> 
> Send packet.. putpkt: write failed. input/output error.
> ...
> 
> if i press c, then it repeat the msg.
> 
> before this. shows
> 
> bad checksum, reply contain invaid hex digit 36...
> 
> 
> i can try to dump all screen output if you think that is useful.
> 
> 
> ming
> 
> 
> On Thu, 2006-01-26 at 15:23 -0800, Jim Blandy wrote:
> > On 1/26/06, Ming Zhang <mingz@xxxxxxxxxxx> wrote:
> > > try to run 2.6.13 and kgdb 2.3. target box is a dual opteron while i
> > > only compile as 32bit on a 32bit centos installation.
> > >
> > > i tried various kernel configurations. like SMP. UP. different preempt
> > > options. tried 115200 or 38400. but it always hangs after this.
> > >
> > >
> > > (gdb) set remotebaud 38400
> > > (gdb) target remote /dev/ttyS0
> > > Remote debugging using /dev/ttyS0
> > > breakpoint () at kernel/kgdb.c:1776
> > > 1776            atomic_set(&kgdb_setting_breakpoint, 0);
> > > Reply contains invalid hex digit 36
> > > (gdb) c
> > > Continuing.
> > > Reply contains invalid hex digit 36
> > > (gdb) c
> > > Continuing.
> > >
> > > any idea on where to start? thanks!
> > 
> > I'm not the most experienced KGDB person here, but I would start by
> > saying "set debug remote 1" before the "target remote" command, so you
> > can see what the stub and GDB are actually saying to each other.
> 



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