From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/scripts/gen_autoksyms.sh | 44 ++++++++++++++++++++++++++++++++------------
1 files changed, 32 insertions(+), 12 deletions(-)
diff --git a/kernel/scripts/gen_autoksyms.sh b/kernel/scripts/gen_autoksyms.sh
index 846dde7..da32015 100755
--- a/kernel/scripts/gen_autoksyms.sh
+++ b/kernel/scripts/gen_autoksyms.sh
@@ -2,7 +2,7 @@
# 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 third line of *.mod files and the user-provided symbol
+# as recorded on the second line of *.mod files and the user-provided symbol
# whitelist.
set -e
@@ -19,7 +19,26 @@
# We need access to CONFIG_ symbols
. include/config/auto.conf
-ksym_wl=/dev/null
+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"
@@ -39,14 +58,15 @@
EOT
-for mod in "$MODVERDIR"/*.mod; do
- [ -f "$mod" ] && sed -n -e '3{s/ /\n/g;/^$/!p;}' "$mod"
-done | cat - "$ksym_wl" | sort -u |
-while read sym; do
- echo "#define __KSYM_${sym} 1"
-done >> "$output_file"
+[ -f modules.order ] && modlist=modules.order || modlist=/dev/null
-# Special case for modversions (see modpost.c)
-if [ -n "$CONFIG_MODVERSIONS" ]; then
- echo "#define __KSYM_module_layout 1" >> "$output_file"
-fi
+{
+ sed 's/ko$/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"
--
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