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

From: Ananth N Mavinakayanahalli <[email-masked]>
Date: Wed, 10 Dec 2014 09:42:23 +0530

On Tue, Dec 09, 2014 at 11:03:58PM +0530, Naveen N. Rao wrote:
> 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

For the full patchset...

Reviewed-by: Ananth N Mavinakayanahalli <[email-masked]>