diff options
Diffstat (limited to 'scripts/gen_autoksyms.sh')
-rwxr-xr-x | scripts/gen_autoksyms.sh | 62 |
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" |