Messages in this thread | | | Date | Wed, 21 Mar 2012 13:03:28 -0500 | From | Jason Wessel <> | Subject | Re: [PATCH] kdb: Add message about CONFIG_DEBUG_RODATA on failure to install breakpoint |
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On 03/20/2012 04:55 PM, Jason Wessel wrote: >
> Obviously we are not going to go down the horrible hack route, so I > thought I might look at how the kprobe implementation works, because > they do deal with read-only pages. They created a function called > text_poke() that is called from arch_arm_probe(). > > It might be possible to take a short cut and use the > arch_arm_probe() directly. Ultimately I would like to consider just > using kprobes instead for things like single stepping etc..., but it > still has a few problems with atomic reservations. This work had > been shelved in back 2010, in favor of merging kdb. I am not sure > if anyone wants to take a look at it, but I do think it might > warrant some experimentation.
To follow up on this and move to closure, I did some investigation and concluded it is possible to use the kprobes API to make use of the text_poke() function.
I sent a patch series out for review with the implementation.
https://lkml.org/lkml/2012/3/21/375
Cheers, Jason.
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