| @@ -0,0 +1,56 @@
+#! /bin/bash
+
+sourcedir=${0%/*}
+
+# A lot of symbols are exported by the main kernel image. Find out
+# more precisely which built-in.o file defines them, and fill in
+# that information in Module.symvers. (The built-in.o files are
+# linked together from one or more object files in a directory.)
+# We use this information to better group symbols by subsystems.
+#
+# Usage: built-in-where < Module.symvers
+
+unset LANG ${!LC_*}
+
+# Create a table of all symbol export in a built-in.o file, e.g.,
+# 0xc87c1f84 ktime_get kernel/built-in EXPORT_SYMBOL_GPL
+built_in_exports() {
+ # a/b/c/built-in.o gets linked into a/b/built-in.o, so ensure
+ # that we visit sub-directories first to split up symbols as
+ # much as possible.
+ for obj in $(find -name built-in.o -printf '%d %P\n' \
+ | sort -r \
+ | awk '{ print $2 }'); do
+ $sourcedir/list-exported-symbols -n ${obj%.o} $obj
+ done
+
+ # We could go through the libraries as well, but those functions
+ # are so unlikely to change that this wouldn't help.
+ # (All remaining symbols will end up in the vmlinux set.)
+ #for archive in $(find -name '*.a'); do
+ # $sourcedir/list-exported-symbols -n ${archive%.a} $archive
+ #done
+}
+
+# Filter out duplicates from a Module.symvers dump
+unique_symbols() {
+ awk '
+ { if ($2 in seen)
+ next
+ seen[$2] = 1
+ print
+ }
+ '
+}
+
+# Join together the two tables, including all lines from the first
+# file that don't have a match in the second.
+# Finally, remove the duplicate columns.
+join -t $'\t' -j 2 -a 1 \
+ <(sort -k2) \
+ <(built_in_exports | unique_symbols | sort -k2) \
+| awk '
+BEGIN { FS = "\t" ; OFS = "\t" }
+NF == 7 { print $2, $1, $6, $4 }
+NF == 4 { print $2, $1, $3, $4 }
+'
|
