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
Christophe
In this patchset we also consolidate instruction changes
in kprobes to use patch_instruction().
Balbir Singh (2):
powerpc/lib/code-patching: Enhance code patching
powerpc/kprobes: Move kprobes over to patch_instruction
arch/powerpc/kernel/kprobes.c | 4 +-
arch/powerpc/lib/code-patching.c | 88
++++++++++++++++++++++++++++++++++++++--
2 files changed, 86 insertions(+), 6 deletions(-)
--
2.9.3
