]>
git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - scripts/gen_autoksyms.sh
2 # SPDX-License-Identifier: GPL-2.0-only
4 # Create an autoksyms.h header file from the list of all module's needed symbols
5 # as recorded on the second line of *.mod files and the user-provided symbol
12 # Use "make V=1" to debug this script.
13 case "$KBUILD_VERBOSE" in
19 # We need access to CONFIG_ symbols
20 . include
/config
/auto.conf
24 # Special case for modversions (see modpost.c)
25 if [ -n "$CONFIG_MODVERSIONS" ]; then
26 needed_symbols
="$needed_symbols module_layout"
29 # With CONFIG_LTO_CLANG, LLVM bitcode has not yet been compiled into a binary
30 # when the .mod files are generated, which means they don't yet contain
31 # references to certain symbols that will be present in the final binaries.
32 if [ -n "$CONFIG_LTO_CLANG" ]; then
34 needed_symbols
="$needed_symbols memcpy memmove memset"
36 needed_symbols
="$needed_symbols _mcount"
37 # stack protector symbols
38 needed_symbols
="$needed_symbols __stack_chk_fail __stack_chk_guard"
42 if [ -n "$CONFIG_UNUSED_KSYMS_WHITELIST" ]; then
43 # Use 'eval' to expand the whitelist path and check if it is relative
44 eval ksym_wl
="$CONFIG_UNUSED_KSYMS_WHITELIST"
45 [ "${ksym_wl}" != "${ksym_wl#/}" ] || ksym_wl
="$abs_srctree/$ksym_wl"
46 if [ ! -f "$ksym_wl" ] ||
[ ! -r "$ksym_wl" ]; then
47 echo "ERROR: '$ksym_wl' whitelist file not found" >&2
52 # Generate a new ksym list file with symbols needed by the current
54 cat > "$output_file" << EOT
56 * Automatically generated file; DO NOT EDIT.
61 [ -f modules.order
] && modlist
=modules.order || modlist
=/dev
/null
64 sed 's/ko$/mod/' $modlist |
xargs -n1 sed -n -e '2p'
65 echo "$needed_symbols"
66 [ -n "$ksym_wl" ] && cat "$ksym_wl"
67 } |
sed -e 's/ /\n/g' |
sed -n -e '/^$/!p' |
68 # Remove the dot prefix for ppc64; symbol names with a dot (.) hold entry
72 sed -e 's/\(.*\)/#define __KSYM_\1 1/' >> "$output_file"