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| author | Peter Zijlstra <peterz@infradead.org> | 2022-03-08 16:30:29 +0100 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-03-15 10:32:37 +0100 |
| commit | aebfd12521d9c7d0b502cf6d06314cfbcdccfe3b (patch) | |
| tree | 32b122cd707b1a26aef2d1ac5612f013ee2821e4 /mm/ptdump.c | |
| parent | 6649fa876da4c505548b8e8945a6fc48e62e427c (diff) | |
| download | lwn-aebfd12521d9c7d0b502cf6d06314cfbcdccfe3b.tar.gz lwn-aebfd12521d9c7d0b502cf6d06314cfbcdccfe3b.zip | |
x86/ibt,ftrace: Search for __fentry__ location
Currently a lot of ftrace code assumes __fentry__ is at sym+0. However
with Intel IBT enabled the first instruction of a function will most
likely be ENDBR.
Change ftrace_location() to not only return the __fentry__ location
when called for the __fentry__ location, but also when called for the
sym+0 location.
Then audit/update all callsites of this function to consistently use
these new semantics.
Suggested-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lore.kernel.org/r/20220308154318.227581603@infradead.org
Diffstat (limited to 'mm/ptdump.c')
0 files changed, 0 insertions, 0 deletions