1 files changed, 62 insertions, 0 deletions
diff --git a/scripts/gen_autoksyms.sh b/scripts/gen_autoksyms.sh
new file mode 100755
index 000000000..653fadbad
--- /dev/null
+++ b/scripts/gen_autoksyms.sh
@@ -0,0 +1,62 @@
+#!/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 "${read_modorder}" ] && sed 's/ko$/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"