elf_gen_dep.sh

   1 #!/bin/sh
   2
   3 #######################################################
   4 #  Round 1: get all the loacl and external symbols
   5 #######################################################
   6
   7 for i in com32/elflink/modules/*.c32 core/isolinux.elf core/pxelinux.elf com32/elflink/ldlinux/*.c32
   8 do
   9         # module=$(echo $i | sed "s/^\(.*\).o$/\1/")
  10
  11         # remove the path infomation
  12         module=$(echo $i | sed "s/^.*\/\(.*\)$/\1/")
  13
  14         readelf -s $i > temp.txt
  15         #Get the last 2 items of each line
  16         cut -c47- temp.txt > $module.txt
  17         rm temp.txt
  18
  19         #Get the unresolved symbols
  20         sed -n -e "/UND $/d" -e "/_GLOBAL_OFFSET_TABLE_/d" -e  "s/^.UND.\(.*\)$/\1/p" $module.txt > $module.ext
  21
  22         #Get the local symbols
  23         sed -n -e "/UND/d" -e "/ABS/d" -e "/...[0-9] $/d" -e "/...[0-9] \./d" -e "/...[0-9]/p" $module.txt > $module.int
  24         sed -i -e "s/^.....//g" $module.int
  25         sed -i -e "s/^\(.*\)$/\1 <$module>/g" $module.int
  26
  27         cat $module.int >> all.txt
  28 done
  29
  30
  31 touch modules.dep
  32
  33 #######################################################
  34 #  Round 2: get all the loacl and external symbols
  35 #######################################################
  36
  37 # Consolidate the dependent modules to one line and remove
  38 # the redundant ones, and the "core"
  39 rm_cr ()
  40 {
  41         touch rmcr.tmp
  42         all_dep=$module:
  43         space=' '
  44
  45         while read line
  46         do
  47                 # skip the module which is alreay on the list
  48                 grep $line rmcr.tmp > /dev/null && continue
  49
  50                 # grep extlinux/isolinux and remove them
  51                 echo $line | grep extlinux > /dev/null && continue
  52                 echo $line | grep isolinux > /dev/null && continue
  53                 echo $line | grep pxelinux > /dev/null && continue
  54
  55                 all_dep=$all_dep$space$line
  56                 echo $all_dep > rmcr.tmp
  57         done
  58
  59         echo $all_dep >> modules.dep
  60         rm rmcr.tmp
  61 }
  62
  63 # Find the symbol belongs to which module by screening all.txt, do it
  64 # one by one, and the result "resolve.tmp" will be a file like:
  65 #       a.c32
  66 #       b.c32
  67 #       c.c32
  68 resolve_sym ()
  69 {
  70         touch resolve.tmp
  71
  72         while read symbol
  73         do
  74                 # If no one provides the symbol we're trying to
  75                 # resolve then add it to the list of unresolved
  76                 # symbols.
  77                 grep -q $symbol all.txt
  78                 if [ $? -ne 0 ]; then
  79                         # We only need to add the symbol once
  80                         if [[ ! "$unresolved_symbols" =~ "$symbol" ]]; then
  81                                 unresolved_symbols="$unresolved_symbols $symbol"
  82                         fi
  83                 else
  84                         #echo $symbol
  85                         sed -n -e "s/^$symbol <\(.*\)>/\1/p" all.txt >> resolve.tmp
  86                         #grep $symbol all.txt
  87                 fi
  88         done
  89
  90         rm_cr < resolve.tmp
  91         rm resolve.tmp
  92 }
  93
  94 #only test name start with a/b
  95 #rm [c-z]*.ext
  96
  97 if [ -e modules.dep ]
  98 then
  99         rm modules.dep
 100         touch modules.dep
 101 fi
 102
 103 # Don't need to resolve the core symbols
 104 for i in extlinux isolinux pxelinux
 105 do
 106         if [ -e $i.elf.ext ]
 107         then
 108                 rm $i.elf.ext
 109         fi
 110 done
 111
 112 for i in *.ext
 113 do
 114         module=$(echo $i | sed "s/^\(.*\).ext$/\1/")
 115         resolve_sym < $i
 116 done
 117
 118 # Do some cleanup
 119 rm *.txt
 120 rm *.ext
 121 rm *.int
 122
 123 if [ "$unresolved_symbols" ]; then
 124         echo "WARNING: These symbols could not be resolved:" $unresolved_symbols
 125 fi
 126
 127 echo ELF modules dependency is bult up, pls check modules.dep!