[PATCH v4 0/7] powerpc: build out kprobes blacklist -- series 3

[Naveen N. Rao]

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