mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-28 23:23:55 +08:00
a6aaeb8411
Commitfbe078d397("kbuild: lto: add a default list of used symbols") does not work as expected if the .config file has already specified CONFIG_UNUSED_KSYMS_WHITELIST="my/own/white/list" before enabling CONFIG_LTO_CLANG. So, the user-supplied whitelist and LTO-specific white list must be independent of each other. I refactored the shell script so CONFIG_MODVERSIONS and CONFIG_CLANG_LTO handle whitelists in the same way. Fixes:fbe078d397("kbuild: lto: add a default list of used symbols") Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
73 lines
2.0 KiB
Bash
Executable File
73 lines
2.0 KiB
Bash
Executable File
#!/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 on the second line of *.mod files and the user-provided symbol
|
|
# whitelist.
|
|
|
|
set -e
|
|
|
|
output_file="$1"
|
|
|
|
# Use "make V=1" to debug this script.
|
|
case "$KBUILD_VERBOSE" in
|
|
*1*)
|
|
set -x
|
|
;;
|
|
esac
|
|
|
|
# We need access to CONFIG_ symbols
|
|
. include/config/auto.conf
|
|
|
|
needed_symbols=
|
|
|
|
# Special case for modversions (see modpost.c)
|
|
if [ -n "$CONFIG_MODVERSIONS" ]; then
|
|
needed_symbols="$needed_symbols module_layout"
|
|
fi
|
|
|
|
# With CONFIG_LTO_CLANG, LLVM bitcode has not yet been compiled into a binary
|
|
# when the .mod files are generated, which means they don't yet contain
|
|
# references to certain symbols that will be present in the final binaries.
|
|
if [ -n "$CONFIG_LTO_CLANG" ]; then
|
|
# intrinsic functions
|
|
needed_symbols="$needed_symbols memcpy memmove memset"
|
|
# ftrace
|
|
needed_symbols="$needed_symbols _mcount"
|
|
# stack protector symbols
|
|
needed_symbols="$needed_symbols __stack_chk_fail __stack_chk_guard"
|
|
fi
|
|
|
|
ksym_wl=
|
|
if [ -n "$CONFIG_UNUSED_KSYMS_WHITELIST" ]; then
|
|
# Use 'eval' to expand the whitelist path and check if it is relative
|
|
eval ksym_wl="$CONFIG_UNUSED_KSYMS_WHITELIST"
|
|
[ "${ksym_wl}" != "${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
|
|
|
|
[ -f modules.order ] && modlist=modules.order || modlist=/dev/null
|
|
|
|
{
|
|
sed 's/ko$/mod/' $modlist | xargs -n1 sed -n -e '2p'
|
|
echo "$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 |
|
|
sed -e 's/\(.*\)/#define __KSYM_\1 1/' >> "$output_file"
|