diff options
| author | Naveen N Rao <[email protected]> | 2023-06-09 09:15:01 +0530 |
|---|---|---|
| committer | Michael Ellerman <[email protected]> | 2023-06-19 17:37:13 +1000 |
| commit | d24da1f85530a5b47590c0febd1395dd8fc73124 (patch) | |
| tree | 2efce4d53f32b514e477bd550681a6bdaeca98ef /tools/perf/util/trace-event-scripting.c | |
| 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 <[email protected]>
Acked-by: Nick Desaulniers <[email protected]>
Link: https://github.com/llvm/llvm-project/issues/63220
Signed-off-by: Michael Ellerman <[email protected]>
Link: https://msgid.link/[email protected]
Diffstat (limited to 'tools/perf/util/trace-event-scripting.c')
0 files changed, 0 insertions, 0 deletions