add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/scripts/gen_autoksyms.sh
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@@ -2,7 +2,7 @@
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 # SPDX-License-Identifier: GPL-2.0-only
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 # Create an autoksyms.h header file from the list of all module's needed symbols
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-# as recorded on the third line of *.mod files and the user-provided symbol
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+# as recorded on the second line of *.mod files and the user-provided symbol
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 # whitelist.
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 set -e
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@@ -19,7 +19,26 @@
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 # We need access to CONFIG_ symbols
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 . include/config/auto.conf
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-ksym_wl=/dev/null
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+needed_symbols=
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+
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+# Special case for modversions (see modpost.c)
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+if [ -n "$CONFIG_MODVERSIONS" ]; then
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+	needed_symbols="$needed_symbols module_layout"
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+fi
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+
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+# With CONFIG_LTO_CLANG, LLVM bitcode has not yet been compiled into a binary
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+# when the .mod files are generated, which means they don't yet contain
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+# references to certain symbols that will be present in the final binaries.
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+if [ -n "$CONFIG_LTO_CLANG" ]; then
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+	# intrinsic functions
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+	needed_symbols="$needed_symbols memcpy memmove memset"
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+	# ftrace
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+	needed_symbols="$needed_symbols _mcount"
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+	# stack protector symbols
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+	needed_symbols="$needed_symbols __stack_chk_fail __stack_chk_guard"
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+fi
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+
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+ksym_wl=
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 if [ -n "$CONFIG_UNUSED_KSYMS_WHITELIST" ]; then
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 	# Use 'eval' to expand the whitelist path and check if it is relative
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 	eval ksym_wl="$CONFIG_UNUSED_KSYMS_WHITELIST"
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@@ -39,14 +58,15 @@
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 EOT
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-for mod in "$MODVERDIR"/*.mod; do
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-	[ -f "$mod" ] && sed -n -e '3{s/ /\n/g;/^$/!p;}' "$mod"
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-done | cat - "$ksym_wl" | sort -u |
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-while read sym; do
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-	echo "#define __KSYM_${sym} 1"
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-done >> "$output_file"
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+[ -f modules.order ] && modlist=modules.order || modlist=/dev/null
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-# Special case for modversions (see modpost.c)
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-if [ -n "$CONFIG_MODVERSIONS" ]; then
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-	echo "#define __KSYM_module_layout 1" >> "$output_file"
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-fi
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+{
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+	sed 's/ko$/mod/' $modlist | xargs -n1 sed -n -e '2p'
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+	echo "$needed_symbols"
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+	[ -n "$ksym_wl" ] && cat "$ksym_wl"
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+} | sed -e 's/ /\n/g' | sed -n -e '/^$/!p' |
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+# Remove the dot prefix for ppc64; symbol names with a dot (.) hold entry
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+# point addresses.
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+sed -e 's/^\.//' |
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+sort -u |
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+sed -e 's/\(.*\)/#define __KSYM_\1 1/' >> "$output_file"