sys/kern/genassym.sh

   1 #!/bin/sh
   2
   3 usage()
   4 {
   5         echo "usage: genassym [-o outfile] objfile"
   6         exit 1
   7 }
   8
   9
  10 work()
  11 {
  12         ${NM:='nm'} ${NMFLAGS} "$1" | ${AWK:='awk'} '
  13         / C .*sign$/ {
  14                 sign = substr($1, length($1) - 3, 4)
  15                 sub("^0*", "", sign)
  16                 if (sign != "")
  17                         sign = "-"
  18         }
  19         / C .*w0$/ {
  20                 w0 = substr($1, length($1) - 3, 4)
  21         }
  22         / C .*w1$/ {
  23                 w1 = substr($1, length($1) - 3, 4)
  24         }
  25         / C .*w2$/ {
  26                 w2 = substr($1, length($1) - 3, 4)
  27         }
  28         / C .*w3$/ {
  29                 w3 = substr($1, length($1) - 3, 4)
  30                 w = w3 w2 w1 w0
  31                 sub("^0*", "", w)
  32                 if (w == "")
  33                         w = "0"
  34                 hex = ""
  35                 if (w != "0")
  36                         hex = "0x"
  37                 sub("w3$", "", $3)
  38                 # This still has minor problems representing INT_MIN, etc.
  39                 # E.g.,
  40                 # with 32-bit 2''s complement ints, this prints -0x80000000,
  41                 # which has the wrong type (unsigned int).
  42                 printf("#define\t%s\t%s%s%s\n", $3, sign, hex, w)
  43         } '
  44 }
  45
  46
  47 #
  48 #MAIN PROGGRAM
  49 #
  50 use_outfile="no"
  51 while getopts "o:" option
  52 do
  53         case "$option" in
  54         o)      outfile="$OPTARG"
  55                 use_outfile="yes";;
  56         *)      usage;;
  57         esac
  58 done
  59 shift $((OPTIND - 1))
  60 case $# in
  61 1)      ;;
  62 *)      usage;;
  63 esac
  64
  65 if [ "$use_outfile" = "yes" ]
  66 then
  67         work "$1"  3>"$outfile" >&3 3>&-
  68 else
  69         work "$1"
  70 fi
  71