* [email protected] ([email protected]) wrote:
> On 5 Dec 2007 at 21:02, Mathieu Desnoyers wrote:
>
> > Fix a memcpy that should be a text_poke (in apply_alternatives).
> >
> > Use kernel_wp_save/kernel_wp_restore in text_poke to support DEBUG_RODATA
> > correctly and so the CPU HOTPLUG special case can be removed.
> >
> > Add text_poke_early, for alternatives and paravirt boot-time and module load
> > time patching.
> >
> > Notes:
> > - we use a macro for kernel_wp_save/restore to mimic local_irq_save/restore: the
> > argument is passed without &.
>
> sorry to chime in again, but lately i've been thinking that the
> cr0 argument is not really needed if one can ensure that calls
> to the kernel open/close macros won't nest (i checked and even
> in the PaX case it's easy to ensure, even desirable in fact).
>
> in your case it's also true for now and i can't think of a situation
> where you'd really want to nest in the future (that'd mean opening
> up the kernel while some complex piece of code runs, more complex
> than a mere memset at least ;-). what do you think?
>
It is correct to assume that the WP bit will always be activated, in
every configuration, even though we don't use the DEBUG_RODATA ?
--
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
