scripts/check-textrel.awk

   1 # This awk script expects to get command-line files that are each
   2 # the output of 'readelf -d' on a single shared object.
   3 # It exits successfully (0) if none contained any TEXTREL markers.
   4 # It fails (1) if any did contain a TEXTREL marker.
   5 # It fails (2) if the input did not take the expected form.
   6
   7 BEGIN { result = textrel = sanity = 0 }
   8
   9 function check_one(name) {
  10   if (!sanity) {
  11     print name ": *** input did not look like readelf -d output";
  12     result = 2;
  13   } else if (textrel) {
  14     print name ": *** text relocations used";
  15     result = result ? result : 1;
  16   } else {
  17     print name ": OK";
  18   }
  19
  20   textrel = sanity = 0;
  21 }
  22
  23 FILENAME != lastfile {
  24   if (lastfile)
  25     check_one(lastfile);
  26   lastfile = FILENAME;
  27 }
  28
  29 $1 == "Tag" && $2 == "Type" { sanity = 1 }
  30 $2 == "(TEXTREL)" { textrel = 1 }
  31 $2 == "(FLAGS)" {
  32   for (i = 3; i <= NF; ++i) {
  33     if ($i == "TEXTREL")
  34       textrel = 1;
  35   }
  36 }
  37
  38 END {
  39   check_one(lastfile);
  40   exit(result);
  41 }