[linux-block.git] / scripts / gen_autoksyms.sh

#!/bin/sh
# SPDX-License-Identifier: GPL-2.0-only

# Create an autoksyms.h header file from the list of all module's needed symbols
# as recorded in *.usyms files and the user-provided symbol whitelist.

set -e

# Use "make V=1" to debug this script.
case "$KBUILD_VERBOSE" in
*1*)
	set -x
	;;
esac

read_modorder=

if [ "$1" = --modorder ]; then
	shift
	read_modorder=1
fi

output_file="$1"

needed_symbols=

# Special case for modversions (see modpost.c)
if grep -q "^CONFIG_MODVERSIONS=y$" include/config/auto.conf; then
	needed_symbols="$needed_symbols module_layout"
fi

ksym_wl=$(sed -n 's/^CONFIG_UNUSED_KSYMS_WHITELIST=\(.*\)$/\1/p' include/config/auto.conf)
if [ -n "$ksym_wl" ]; then
	[ "${ksym_wl}" != "${ksym_wl#/}" ] || ksym_wl="$abs_srctree/$ksym_wl"
	if [ ! -f "$ksym_wl" ] || [ ! -r "$ksym_wl" ]; then
		echo "ERROR: '$ksym_wl' whitelist file not found" >&2
		exit 1
	fi
fi

# Generate a new ksym list file with symbols needed by the current
# set of modules.
cat > "$output_file" << EOT
/*
 * Automatically generated file; DO NOT EDIT.
 */

EOT

{
	[ -n "${read_modorder}" ] && sed 's/o$/usyms/' modules.order | xargs cat
	echo "$needed_symbols"
	[ -n "$ksym_wl" ] && cat "$ksym_wl"
} | sed -e 's/ /\n/g' | sed -n -e '/^$/!p' |
# Remove the dot prefix for ppc64; symbol names with a dot (.) hold entry
# point addresses.
sed -e 's/^\.//' |
sort -u |
# Ignore __this_module. It's not an exported symbol, and will be resolved
# when the final .ko's are linked.
grep -v '^__this_module$' |
sed -e 's/\(.*\)/#define __KSYM_\1 1/' >> "$output_file"
Commit	Line	Data
cd195bc4 QP	1	#!/bin/sh
	2	# SPDX-License-Identifier: GPL-2.0-only
	3
	4	# Create an autoksyms.h header file from the list of all module's needed symbols
9413e764	5	# as recorded in *.usyms files and the user-provided symbol whitelist.
cd195bc4 QP	6
	7	set -e
	8
cd195bc4 QP	9	# Use "make V=1" to debug this script.
	10	case "$KBUILD_VERBOSE" in
	11	1)
	12	set -x
	13	;;
	14	esac
	15
9413e764 MY	16	read_modorder=
	17
	18	if [ "$1" = --modorder ]; then
	19	shift
	20	read_modorder=1
	21	fi
	22
	23	output_file="$1"
	24
a6aaeb84 MY	25	needed_symbols=
	26
	27	# Special case for modversions (see modpost.c)
7d153696	28	if grep -q "^CONFIG_MODVERSIONS=y$" include/config/auto.conf; then
a6aaeb84 MY	29	needed_symbols="$needed_symbols module_layout"
	30	fi
	31
129ab0d2	32	ksym_wl=$(sed -n 's/^CONFIG_UNUSED_KSYMS_WHITELIST=\(.*\)$/\1/p' include/config/auto.conf)
7d153696	33	if [ -n "$ksym_wl" ]; then
cd195bc4 QP	34	[ "${ksym_wl}" != "${ksym_wl#/}" ] \|\| ksym_wl="$abs_srctree/$ksym_wl"
	35	if [ ! -f "$ksym_wl" ] \|\| [ ! -r "$ksym_wl" ]; then
	36	echo "ERROR: '$ksym_wl' whitelist file not found" >&2
	37	exit 1
	38	fi
	39	fi
	40
	41	# Generate a new ksym list file with symbols needed by the current
	42	# set of modules.
	43	cat > "$output_file" << EOT
	44	/*
	45	* Automatically generated file; DO NOT EDIT.
	46	*/
	47
	48	EOT
	49
a6aaeb84	50	{
f65a4868	51	[ -n "${read_modorder}" ] && sed 's/o$/usyms/' modules.order \| xargs cat
a6aaeb84 MY	52	echo "$needed_symbols"
	53	[ -n "$ksym_wl" ] && cat "$ksym_wl"
	54	} \| sed -e 's/ /\n/g' \| sed -n -e '/^$/!p' \|
29500f15 MY	55	# Remove the dot prefix for ppc64; symbol names with a dot (.) hold entry
	56	# point addresses.
	57	sed -e 's/^\.//' \|
cd195bc4	58	sort -u \|
ff139766 ST	59	# Ignore __this_module. It's not an exported symbol, and will be resolved
	60	# when the final .ko's are linked.
	61	grep -v '^__this_module$' \|
cd195bc4	62	sed -e 's/\(.*\)/#define __KSYM_\1 1/' >> "$output_file"