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SubjectRe: [patch 1/3] x86_64: Add a notify_die() call to the "no context" part of do_page_fault()
Tom Rini wrote:
> CC: Andi Kleen <ak@suse.de>
> This adds a call to notify_die() in the "no context" portion of
> do_page_fault() as someone on the chain might care and want to do a fixup.
>
> ---
>
> linux-2.6.13-trini/arch/x86_64/mm/fault.c | 4 ++++
> 1 files changed, 4 insertions(+)
>
> diff -puN arch/x86_64/mm/fault.c~x86_64-no_context_hook arch/x86_64/mm/fault.c
> --- linux-2.6.13/arch/x86_64/mm/fault.c~x86_64-no_context_hook 2005-08-29 11:09:13.000000000 -0700
> +++ linux-2.6.13-trini/arch/x86_64/mm/fault.c 2005-08-29 11:09:13.000000000 -0700
> @@ -514,6 +514,10 @@ no_context:
> if (is_errata93(regs, address))
> return;
>
> + if (notify_die(DIE_PAGE_FAULT, "no context", regs, error_code, 14,
> + SIGSEGV) == NOTIFY_STOP)
> + return;
> +
> /*
> * Oops. The kernel tried to access some bad page. We'll have to
> * terminate things with extreme prejudice.

Please use a more descriptive text than "no context". This bit of info
SHOULD be available to the gdb/kgdb user and should indicate why kgdb
was entered. It thus should be something like "bad kernel address" or
"illegal kernel address".
>
--
George Anzinger george@mvista.com
HRT (High-res-timers): http://sourceforge.net/projects/high-res-timers/
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