• Namhyung Kim's avatar
    perf annotate-data: Handle direct global variable access · 4449c904
    Namhyung Kim authored
    Like per-cpu base offset array, sometimes it accesses the global
    variable directly using the offset.  Allow this type of instructions as
    long as it finds a global variable for the address.
    
      movslq  %edi, %rcx
      mov     -0x7dc94ae0(,%rcx,8), %rcx   <<<--- here
    
    As %rcx has a valid type (i.e. array index) from the first instruction,
    it will be checked by the first case in check_matching_type().  But as
    it's not a pointer type, the match will fail.  But in this case, it
    should check if it accesses the kernel global array variable.
    Signed-off-by: default avatarNamhyung Kim <namhyung@kernel.org>
    Cc: Adrian Hunter <adrian.hunter@intel.com>
    Cc: Ian Rogers <irogers@google.com>
    Cc: Ingo Molnar <mingo@kernel.org>
    Cc: Jiri Olsa <jolsa@kernel.org>
    Cc: Kan Liang <kan.liang@linux.intel.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Link: https://lore.kernel.org/r/20240502060011.1838090-4-namhyung@kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    4449c904
annotate-data.c 49.9 KB