linux-kernel - Re: KGDB fails to pass selft tests on x86-64 (v2.6.26)

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Date:	Thu, 24 Jul 2008 17:19:52 +0200
From:	"Francis Moreau" <francis.moro@...il.com>
To:	"Jason Wessel" <jason.wessel@...driver.com>
Cc:	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>
Subject: Re: KGDB fails to pass selft tests on x86-64 (v2.6.26)

Hello,

On Thu, Jul 24, 2008 at 4:30 PM, Jason Wessel
<jason.wessel@...driver.com> wrote:
>
> It is because the qemu you are using does not support hardware
> breakpoints.  The tests will warn, but the kernel will continue to boot
> and tell you that hw breakpoint support doesn't work on your simulated
> hardware.

ah ok, thanks.

While I have your attention, I sometimes (well pretty often actually) got this
inside my gdb session:

   (gdb) n
   warning: Invalid remote reply: 00

or

   (gdb) n
   warning: Invalid remote reply: 00
   warning: Invalid remote reply:
c0dcb40f0081ffff08e59f0f0081ffff00b1a40f0081ffff8086400f0081ffff704e2c81ffffffff01000000008000000d00000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002000000000000000ffffffffffffffff0000000000000000

Do you any idea what's wrong in this case ?

>
> Also, if you plan to use software breakpoints, please make sure to turn
> off CONFIG_DEBUG_RODATA, else they will not work.   This is a regression
> which will is on my list of things to take a look at, as time permits.
>

Yes I did that since I did notice a previous post where you adviced the same
thing.

Thanks
-- 
Francis
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