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| author | Naveen N Rao <naveen@kernel.org> | 2023-06-09 09:15:01 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2023-06-19 17:37:13 +1000 |
| commit | d24da1f85530a5b47590c0febd1395dd8fc73124 (patch) | |
| tree | 2efce4d53f32b514e477bd550681a6bdaeca98ef /tools/perf/scripts/python/exported-sql-viewer.py | |
| parent | f4f913c980bc6abe0ccfe88fe3909c125afe4a2d (diff) | |
powerpc/ftrace: Disable ftrace on ppc32 if using clang
Ftrace on ppc32 expects a three instruction sequence at the beginning of
each function when specifying -pg:
mflr r0
stw r0,4(r1)
bl _mcount
This is the case with all supported versions of gcc. Clang however emits
a branch to _mcount after the function prologue, similar to the pre
-mprofile-kernel ABI on ppc64. This is not supported.
Disable ftrace on ppc32 if using clang for now. This can be re-enabled
later if clang picks up support for -fpatchable-function-entry on ppc32.
Signed-off-by: Naveen N Rao <naveen@kernel.org>
Acked-by: Nick Desaulniers <ndesaulniers@google.com>
Link: https://github.com/llvm/llvm-project/issues/63220
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230609034501.407971-1-naveen@kernel.org
Diffstat (limited to 'tools/perf/scripts/python/exported-sql-viewer.py')
0 files changed, 0 insertions, 0 deletions