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ftrace: Add perf ksymbol events for ftrace trampolines

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Symbols are needed for tools to describe instruction addresses. Pages
allocated for ftrace's purposes need symbols to be created for them.
Add such symbols to be visible via perf ksymbol events.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200512121922.8997-8-adrian.hunter@intel.com
This commit is contained in:
Adrian Hunter
2020-05-12 15:19:14 +03:00
committed by Peter Zijlstra
parent fc0ea795f5
commit dd9ddf466a
2 changed files with 13 additions and 3 deletions
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2
include/uapi/linux/perf_event.h
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@@ -1051,7 +1051,7 @@ enum perf_record_ksymbol_type {
PERF_RECORD_KSYMBOL_TYPE_BPF = 1,
/*
* Out of line code such as kprobe-replaced instructions or optimized
* kprobes.
* kprobes or ftrace trampolines.
*/
PERF_RECORD_KSYMBOL_TYPE_OOL = 2,
PERF_RECORD_KSYMBOL_TYPE_MAX /* non-ABI */