scripts/mkdiff_obj

   1 #!/bin/sh
   2
   3 usage() {
   4         echo "Usage: ${0##*/} DIR1 DIR2"
   5         echo
   6         echo "Compares all object files recursivelty found in DIR1 and DIR2."
   7         echo "Prints diff of their disassembly."
   8         echo
   9         exit $1
  10 }
  11
  12 filter() {
  13         # sed removes " address: " prefixes which mess up diff
  14         sed $'s/^\\(\t*\\)[ ]*[0-9a-f][0-9a-f]*:[ \t]*/\\1/' \
  15         | sed 's/__GI_//g'
  16 }
  17
  18 test -d "$1" || usage 1
  19 test -d "$2" || usage 1
  20
  21 {
  22         (
  23                 cd "$1" || exit 1
  24                 find -name '*.o' # -o -name '*.os' # -o -name '*.so'
  25         )
  26         (
  27                 cd "$2" || exit 1
  28                 find -name '*.o' # -o -name '*.os' # -o -name '*.so'
  29         )
  30 } | sed 's:^\./::' | sort | uniq | \
  31 (
  32 while IFS='' read -r oname; do
  33         if ! test -f "$1/$oname"; then
  34                 echo "Only $2/$oname"
  35                 continue
  36         fi
  37         if ! test -f "$2/$oname"; then
  38                 echo "Only $1/$oname"
  39                 continue
  40         fi
  41         diff -q -- "$1/$oname" "$2/$oname" >/dev/null && continue
  42         (cd "$1" && { size "$oname"; objdump -dr "$oname" | filter; } >"$oname.disasm")
  43         (cd "$2" && { size "$oname"; objdump -dr "$oname" | filter; } >"$oname.disasm")
  44         diff -u -- "$1/$oname.disasm" "$2/$oname.disasm"
  45 done
  46 )