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