lkml.org 
[lkml]   [2000]   [Oct]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: (reiserfs hang at boot) where is the kernel debugger?
On Wed, 4 Oct 2000, Keith Owens wrote:
> Rik van Riel <riel@conectiva.com.br> wrote:

> >Sysrq-T is broken on x86 ;((((((((
>
> show_task() calls thread_saved_pc() which is giving bad results.
> Getting the correct PC for blocked threads is easy,
>
> Index: 0-test9-pre9.3/include/asm-i386/processor.h
> --- 0-test9-pre9.3/include/asm-i386/processor.h Tue, 08 Aug 2000 16:14:08 +1000 kaos (linux-2.4/P/18_processor. 1.1.1.5 644)
> +++ 0-test9-pre9.3(w)/include/asm-i386/processor.h Wed, 04 Oct 2000 01:48:32 +1100 kaos (linux-2.4/P/18_processor. 1.1.1.5 644)
> @@ -411,7 +411,7 @@ extern void forget_segments(void);
> * Return saved PC of a blocked thread.
> */
> extern inline unsigned long thread_saved_pc(struct thread_struct *t)
> {
> - return ((unsigned long *)t->esp)[3];
> + return (t->eip);
> }
>
> But it does not give you much. Thread esp and eip are only
> saved during switch_to(), at which point eip always points to
> schedule+0x42c.

Yup ;)

So this function will need to look at the call trace and
give the function that called schedule() ...

regards,

Rik
--
"What you're running that piece of shit Gnome?!?!"
-- Miguel de Icaza, UKUUG 2000

http://www.conectiva.com/ http://www.surriel.com/

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 12:39    [from the cache]
©2003-2011 Jasper Spaans