elflink: add modules.dep gen sh

diff --git a/elf_gen_dep.sh b/elf_gen_dep.sh
new file mode 100755 (executable)
index 0000000..654f96d
--- /dev/null
+++ b/elf_gen_dep.sh
@@ -0,0 +1,111 @@
+#!/bin/sh
+
+#######################################################
+#  Round 1: get all the loacl and external symbols
+#######################################################
+
+for i in com32/elflink/modules/*.c32 core/extlinux.elf core/isolinux.elf core/pxelinux.elf
+do
+       # module=$(echo $i | sed "s/^\(.*\).o$/\1/")
+       
+       # remove the path infomation
+       module=$(echo $i | sed "s/^.*\/\(.*\)$/\1/")
+
+       readelf -s $i > temp.txt
+       #Get the last 2 items of each line
+       cut -c47- temp.txt > $module.txt 
+       rm temp.txt
+
+       #Get the unresolved symbols
+       sed -n -e "/UND $/d" -e "/_GLOBAL_OFFSET_TABLE_/d" -e  "s/^.UND.\(.*\)$/\1/p" $module.txt > $module.ext
+
+       #Get the local symbols
+       sed -n -e "/UND/d" -e "/ABS/d" -e "/...[0-9] $/d" -e "/...[0-9] \./d" -e "/...[0-9]/p" $module.txt > $module.int 
+       sed -i -e "s/^.....//g" $module.int
+       sed -i -e "s/^\(.*\)$/\1 <$module>/g" $module.int
+
+       cat $module.int >> all.txt
+done
+
+
+touch modules.dep
+
+#######################################################
+#  Round 2: get all the loacl and external symbols
+#######################################################
+
+# Consolidate the dependent modules to one line and remove
+# the redundant ones, and the "core" 
+rm_cr ()
+{
+       touch rmcr.tmp
+       all_dep=$module:
+       space=' '
+
+       while read line
+       do
+               # skip the module which is alreay on the list 
+               grep $line rmcr.tmp > /dev/null && continue
+
+               # grep extlinux/isolinux and remove them
+               echo $line | grep extlinux > /dev/null && continue
+               echo $line | grep isolinux > /dev/null && continue
+               echo $line | grep pxelinux > /dev/null && continue
+
+               all_dep=$all_dep$space$line
+               echo $all_dep > rmcr.tmp
+       done
+
+       echo $all_dep >> modules.dep
+       rm rmcr.tmp
+}
+
+# Find the symbol belongs to which module by screening all.txt, do it
+# one by one, and the result "resolve.tmp" will be a file like:
+#      a.c32
+#      b.c32
+#      c.c32
+resolve_sym ()
+{
+       touch resolve.tmp
+
+       while read symbol 
+       do
+               #echo $symbol
+               sed -n -e "s/^$symbol <\(.*\)>/\1/p" all.txt >> resolve.tmp 
+               #grep $symbol all.txt
+       done
+
+       rm_cr < resolve.tmp
+       rm resolve.tmp
+}
+
+#only test name start with a/b
+#rm [c-z]*.ext
+
+if [ -e modules.dep ]
+then
+       rm modules.dep
+       touch modules.dep
+fi
+
+# Don't need to resolve the core symbols
+for i in extlinux isolinux pxelinux
+do
+       if [ -e $i.elf.ext ]
+       then
+               rm $i.elf.ext
+       fi
+done
+
+for i in *.ext 
+do
+       module=$(echo $i | sed "s/^\(.*\).ext$/\1/")
+       resolve_sym < $i
+done
+
+# Do some cleanup
+rm *.txt
+rm *.ext
+rm *.int
+echo ELF modules dependency is bult up, pls check modules.dep!