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| author | Ian Rogers <irogers@google.com> | 2022-11-29 22:29:33 -0800 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2022-12-14 11:16:12 -0300 |
| commit | 5b7a29fb0b7d67e5d40cd6557e073afb6a7466ab (patch) | |
| tree | 596052d95fbed2a5cfc19c266ab74f9108578c58 /tools/perf/util/util.h | |
| parent | fce9a619145181ca6a41253f7de3df56b1e4ad59 (diff) | |
| download | linux-stable-5b7a29fb0b7d67e5d40cd6557e073afb6a7466ab.tar.gz linux-stable-5b7a29fb0b7d67e5d40cd6557e073afb6a7466ab.tar.bz2 linux-stable-5b7a29fb0b7d67e5d40cd6557e073afb6a7466ab.zip | |
perf util: Add host_is_bigendian to util.h
Avoid libtraceevent dependency for tep_is_bigendian or trace-event.h
dependency for bigendian. Add a new host_is_bigendian to util.h, using
the compiler defined __BYTE_ORDER__ when available.
Committer notes:
Added:
#else /* !__BYTE_ORDER__ */
On that nested #ifdef block, as per Namhyung's suggestion.
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
Link: https://lore.kernel.org/r/20221130062935.2219247-3-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/util.h')
| -rw-r--r-- | tools/perf/util/util.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h index 63cdab0e5314..1d3b300af5a1 100644 --- a/tools/perf/util/util.h +++ b/tools/perf/util/util.h @@ -94,4 +94,23 @@ int do_realloc_array_as_needed(void **arr, size_t *arr_sz, size_t x, 0; \ }) +static inline bool host_is_bigendian(void) +{ +#ifdef __BYTE_ORDER__ +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ + return false; +#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ + return true; +#else +#error "Unrecognized __BYTE_ORDER__" +#endif +#else /* !__BYTE_ORDER__ */ + unsigned char str[] = { 0x1, 0x2, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0}; + unsigned int *ptr; + + ptr = (unsigned int *)(void *)str; + return *ptr == 0x01020304; +#endif +} + #endif /* __PERF_UTIL_H */ |