[RFC PATCH 0/8] Fix perf probe issues on powerpc

[Naveen N. Rao]

This patchset fixes various issues with perf probe on powerpc
across ABIv1 and ABIv2:
- in the presence of DWARF debug-info,
- in the absence of DWARF, but with the symbol table, and
- in the absence of debug-info, but with kallsyms.

Applies cleanly on v3.18 and on -tip with minor changes to patch 6.
Tested on ppc64 BE and LE.

- Naveen

Naveen N. Rao (8):
  kprobes: Fix kallsyms lookup across powerpc ABIv1 and ABIv2
  perf probe powerpc: Fix symbol fixup issues due to ELF type
  perf probe: Improve detection of file/function name in the probe
    pattern
  perf probe powerpc: Handle powerpc dot symbols
  perf probe powerpc: Allow matching against dot symbols
  perf tools powerpc: Fix PPC64 ELF ABIv2 symbol decoding
  perf probe powerpc: Use DWARF info only if necessary
  perf probe powerpc: Fixup function entry if using kallsyms lookup

 arch/powerpc/include/asm/code-patching.h      | 26 ++++++++----
 arch/powerpc/include/asm/kprobes.h            | 58 ++++++++++++++++++---------
 tools/perf/arch/powerpc/Makefile              |  1 +
 tools/perf/arch/powerpc/util/elf-sym-decode.c | 27 +++++++++++++
 tools/perf/config/Makefile                    |  1 +
 tools/perf/util/elf_sym.h                     | 13 ++++++
 tools/perf/util/probe-event.c                 | 57 ++++++++++++++++++++++++--
 tools/perf/util/symbol-elf.c                  | 11 ++++-
 tools/perf/util/symbol.c                      |  6 +++
 9 files changed, 170 insertions(+), 30 deletions(-)
 create mode 100644 tools/perf/arch/powerpc/util/elf-sym-decode.c
 create mode 100644 tools/perf/util/elf_sym.h

-- 
2.1.3

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