[V3,0/4] arm-cs-trace-disasm.py/perf must accommodate non-zero DSO text offset

Message

Steve Clevenger Aug. 28, 2024, 1:50 a.m. UTC

Changes in V3:
  - Rebased to linux-perf-tools branch.
  - Squash symbol-elf.c and symbol.h into same commit.
  - In map.c, merge dso__is_pie() call into existing if statement.
  - In arm-cs-trace-disasm.py, remove debug artifacts.

Changes in V2:
  - In dso__is_pie() (symbol-elf.c), Decrease indentation, add null pointer
    checks per Leo Yan review.
  - Updated mailing list distribution

Fedora 37 distributed shared binary and executable mapped files show a
zero text section offset. Starting with the Fedora 38 distribution, the
shared binary and executable mapped files show a non-zero text section
offset for some binaries. The text offset parameter is never passed into
the arm-cs-trace-disasm.py script to allow the script to adjust the
start/end address range passed to objdump. This adjustment is required
to correctly offset into the dso text section. Not doing so results in
an incorrect user instruction trace display for Fedora 38 (and later)
user trace output.

Steve Clevenger (4):
  Add dso__is_pie call to identify ELF PIE
  Force MAPPING_TYPE__IDENTIY for PIE
  Add map pgoff to python dictionary based on MAPPING_TYPE
  Adjust objdump start/end range per map pgoff parameter

 .../scripts/python/arm-cs-trace-disasm.py     |  9 ++-
 tools/perf/util/map.c                         |  4 +-
 .../scripting-engines/trace-event-python.c    | 13 +++-
 tools/perf/util/symbol-elf.c                  | 60 +++++++++++++++++++
 tools/perf/util/symbol.h                      |  1 +
 5 files changed, 79 insertions(+), 8 deletions(-)