This is the third in the series of patches to build out an appropriate
kprobes blacklist for powerpc. Since posting the second series (*),
there have been related changes to the code and I have brought that
series forward to account for those changes. As such, all patches from
the second series are included in this patchset.
This patchset now ensures that the newly added multiple kprobes test in
the ftrace testsuite passes on powerpc64. Tested on both Elfv1 and
Elfv2.
Changes since v3:
- Patch 1 now implements a different approach by checking if the function
pointer points to .text or not.
- Patch 4 is new, as suggested by Nick.
- Patch 6 (previously 5) changed to leave 'restore' symbol alone.
- Patch 7 (previously 6) moves __rtas_enter after the mtmsr.
- Patches 2, 3 and 5 (previously numbered 4) are unchanged
v3:
https://www.mail-archive.com/linuxppc-dev@lists.ozlabs.org/msg119596.html
(*) series 2:
https://www.mail-archive.com/linuxppc-dev@lists.ozlabs.org/msg117562.html
- Naveen
Naveen N. Rao (7):
powerpc64/elfv1: Only dereference function descriptor for non-text
symbols
powerpc/64s: Convert .L__replay_interrupt_return to a local label
powerpc/64s: Blacklist system_call() and system_call_common() from
kprobes
powerpc/64s: Move system_call() symbol to just after setting MSR_EE
powerpc/64s: Un-blacklist system_call() from kprobes
powerpc/64s: Blacklist functions invoked on a trap
powerpc/64s: Blacklist rtas entry/exit from kprobes
arch/powerpc/include/asm/code-patching.h | 10 ++++-
arch/powerpc/kernel/entry_64.S | 75 +++++++++++++++++++-------------
arch/powerpc/kernel/exceptions-64s.S | 6 ++-
arch/powerpc/kernel/traps.c | 3 ++
4 files changed, 61 insertions(+), 33 deletions(-)
--
2.13.1
