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    SubjectRe: [PATCH] kdb: Add message about CONFIG_DEBUG_RODATA on failure to install breakpoint

    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.


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