Re: [Crash-utility] using crash for ARM
how about if crash utility supports breakpoints/watchpoints specifically hw level.
of course need a kernel module to modify kernel memory as you suggested.
was there any specific reason, you did not support this, thinking already kgdb and kdb
types of utility available ?
If we support breakpoint./watchpoints in crash, will the crash be able to offer much
better than any other kernel debug tools ?
what do you think?
Regards,
Oza.
________________________________
From: Dave Anderson <anderson(a)redhat.com>
To: paawan oza <paawan1982(a)yahoo.com>
Cc: "Discussion list for crash utility usage, maintenance and development"
<crash-utility(a)redhat.com>
Sent: Tuesday, 7 August 2012 6:58 PM
Subject: Re: [Crash-utility] using crash for ARM
----- Original Message -----
Hi Dave,
Will I be able to set breakpoints and watch points in kernel space ?
Definitely not. Keep in mind that the crash utility is a simple
user-space program that happens to read kernel memory. It is not
a kernel debugger. Setting breakpoints/watch points requires the
capability of modifying kernel memory, setting up kernel handlers
to respond to the breakpoint interrupts, etc.
Do you accept the changes/contribution to crash ?
Sure -- if you check the archives, you can see that posting patches
is one of the primary purposes for this mailing list.
Dave
Regards,
Oza.
From: Dave Anderson <anderson(a)redhat.com>
To: paawan oza <paawan1982(a)yahoo.com>; "Discussion list for crash
utility usage, maintenance and development"
<crash-utility(a)redhat.com>
Sent: Monday, 6 August 2012 8:58 PM
Subject: Re: [Crash-utility] using crash for ARM
----- Original Message -----
>
>
>
> Hi,
>
>
> I would like to use crash utility on ARM.
> what I understand is there might be two ways to go about it.
>
> 1) cross compile whole crash for arm itself, which doesnt seem to
> be
> good option because on arm target we will need lots of depedent
> packages.
>
> 2) run crash on x86 and have gdbserver/remoter server compiled on
> target. and have serial connection and so on..
>
> please suggest instructions or any pointers regarding the same.
>
> Regards,
> Oza.
If you are talking about running crash on a live ARM system, then
option #1 is the only possibility. Option #2 does not exist for
the crash utility; live system access requires either /dev/mem,
/proc/kcore, or the /dev/crash misc driver.
Dave
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