File built-in-where of Package kernel-source

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File built-in-where of Package kernel-source (Revision a32154828f7a1ecab7cd6c6ba34d8a23)

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#! /bin/bash

# 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.,
#   mtrr_add	arch/i386/kernel/cpu/mtrr/built-in
built_in_exports() {
   for obj in $(find -name built-in.o -printf '%P\n'); do
	nm $obj \
	| sed -nre 's:(00000000)?([0-9a-f]+) A __crc_(.*):\3\t'"${obj%.o}:p"
    done
}

# 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 column.
join -t $'\t' -1 2 -2 1 -a 1 \
    <(sort -k2) \
    <(built_in_exports | sort -k1) \
| awk '
BEGIN	{ FS = "\t" ; OFS = "\t" }
NF == 3	{ print $2, $1, $3 }
NF == 4	{ print $2, $1, $4 }
'

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File built-in-where of Package kernel-source (Revision a32154828f7a1ecab7cd6c6ba34d8a23)

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