diff options
| author | Namhyung Kim <[email protected]> | 2024-03-18 22:51:13 -0700 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <[email protected]> | 2024-03-21 10:41:29 -0300 |
| commit | b3c95109c131fcc959d2473e7c384d8cc62d23d0 (patch) | |
| tree | 75e22c1ee75fde09d5ac3eea0f779feead8981f0 /tools/perf/util/annotate-data.h | |
| parent | eb9190afaed6afd5ed54bb0a3269eec338663858 (diff) | |
perf annotate-data: Add stack canary type
When the stack protector is enabled, compiler would generate code to
check stack overflow with a special value called 'stack carary' at
runtime. On x86_64, GCC hard-codes the stack canary as %gs:40.
While there's a definition of fixed_percpu_data in asm/processor.h,
it seems that the header is not included everywhere and many places
it cannot find the type info. As it's in the well-known location (at
%gs:40), let's add a pseudo stack canary type to handle it specially.
Signed-off-by: Namhyung Kim <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Ian Rogers <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Masami Hiramatsu <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Diffstat (limited to 'tools/perf/util/annotate-data.h')
| -rw-r--r-- | tools/perf/util/annotate-data.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/perf/util/annotate-data.h b/tools/perf/util/annotate-data.h index ae0f87aed804..1b5a152163b5 100644 --- a/tools/perf/util/annotate-data.h +++ b/tools/perf/util/annotate-data.h @@ -73,6 +73,7 @@ struct annotated_data_type { extern struct annotated_data_type unknown_type; extern struct annotated_data_type stackop_type; +extern struct annotated_data_type canary_type; /** * struct data_loc_info - Data location information |