Balbir Singh <bsinghar...@gmail.com> a écrit :
On Tue, 2017-05-16 at 22:20 +0200, LEROY Christophe wrote:
Balbir Singh <bsinghar...@gmail.com> a écrit :
> patch_instruction is enhanced in this RFC to support
> patching via a different virtual address (text_poke_area).
> The mapping of text_poke_area->addr is RW and not RWX.
> This way the mapping allows write for patching and then we tear
> down the mapping. The downside is that we introduce a spinlock
> which serializes our patching to one patch at a time.
Very nice patch, would fit great with my patch for impmementing
CONFIG_DEBUG_RODATA (https://patchwork.ozlabs.org/patch/754289 ).
Would avoid having to set the text area back to RW for patching
Awesome! It seems like you have some of the work for CONFIG_STRICT_KERNEL_RWX
any reason why this is under CONFIG_DEBUG_RODATA? But I think there is
reuse capability across the future patches and the current set.
Indeed it looks the same, see https://patchwork.kernel.org/patch/9554881
Christophe
Cheers,
Balbir Singh.
