[PATCH 0/2] Ftrace direct call samples improvements

[Florent Revest]

This series is a subset of [1] that didn't go through the arm64 tree.

- The first patch fixes a small bug when a direct call sample is loaded on x86
- The second patch adds arm64 support to all direct calls samples

They are sent together because the second one depends on the first one.

This series applies cleanly on Linus's master branch. It needs the first two
patches of [1] which, at the time of writing, don't seem to have made it to the
trace/linux-trace tree but I suppose they could be pulled from Linus's master

1: https://lore.kernel.org/bpf/20230405180250.2046566-1-revest@xxxxxxxxxxxx/

Florent Revest (2):
  samples: ftrace: Save required argument registers in sample
    trampolines
  arm64: ftrace: Add direct call trampoline samples support

 arch/arm64/Kconfig                          |  2 ++
 samples/ftrace/ftrace-direct-modify.c       | 34 ++++++++++++++++++
 samples/ftrace/ftrace-direct-multi-modify.c | 40 +++++++++++++++++++++
 samples/ftrace/ftrace-direct-multi.c        | 24 +++++++++++++
 samples/ftrace/ftrace-direct-too.c          | 40 +++++++++++++++++----
 samples/ftrace/ftrace-direct.c              | 24 +++++++++++++
 6 files changed, 158 insertions(+), 6 deletions(-)

-- 
2.40.1.495.gc816e09b53d-goog