kpatch
/
huawei-adapt-kpatch-to-6.6-kernel-and...

From 333898fba5408004adba899ce67c85707aa83574 Mon Sep 17 00:00:00 2001
From: rpm-build <rpm-build>
Date: Tue, 30 Apr 2024 16:38:03 +0800
Subject: [PATCH] adapt kpatch to 6.6 kernel and fix bundle symbols change

---
 kpatch-build/create-diff-object.c |  4 +-
 kpatch-build/kpatch-build         | 70 ++++++++++++++++++++++++++-----
 kpatch-build/kpatch-cc            |  3 +-
 3 files changed, 64 insertions(+), 13 deletions(-)

diff --git a/kpatch-build/create-diff-object.c b/kpatch-build/create-diff-object.c
index d50d745..5de19f4 100644
--- a/kpatch-build/create-diff-object.c
+++ b/kpatch-build/create-diff-object.c
@@ -241,6 +241,7 @@ static void kpatch_bundle_symbols(struct kpatch_elf *kelf)
 {
 	struct symbol *sym;
 	unsigned int expected_offset;
+	unsigned int directcall_offset = 16;

 	list_for_each_entry(sym, &kelf->symbols, list) {
 		if (is_bundleable(sym)) {
@@ -251,7 +252,8 @@ static void kpatch_bundle_symbols(struct kpatch_elf *kelf)
 			else
 				expected_offset = 0;

-			if (sym->sym.st_value != expected_offset) {
+			if (sym->sym.st_value != expected_offset &&
+				!(getenv("CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS") && sym->sym.st_value == directcall_offset)) {
 				ERROR("symbol %s at offset %lu within section %s, expected %u",
 				      sym->name, sym->sym.st_value,
 				      sym->sec->name, expected_offset);
diff --git a/kpatch-build/kpatch-build b/kpatch-build/kpatch-build
index 5817023..8fbe8da 100755
--- a/kpatch-build/kpatch-build
+++ b/kpatch-build/kpatch-build
@@ -142,7 +142,6 @@ verify_patch_files() {

 apply_patches() {
 	local patch
-
 	for patch in "${PATCH_LIST[@]}"; do
 		patch -N -p1 --dry-run < "$patch" 2>&1 | logger || die "$patch file failed to apply"
 		patch -N -p1 < "$patch" 2>&1 | logger || die "$patch file failed to apply"
@@ -157,12 +156,12 @@ remove_patches() {
 	for (( ; APPLIED_PATCHES>0; APPLIED_PATCHES-- )); do
 		idx=$(( APPLIED_PATCHES - 1))
 		patch="${PATCH_LIST[$idx]}"
-		patch -p1 -R -d "$BUILDDIR" < "$patch" &> /dev/null
+		patch -p1 -R -d "$USERSRCDIR" < "$patch" &> /dev/null
 	done

 	# If $BUILDDIR was a git repo, make sure git actually sees that
 	# we've reverted our patch(es).
-	[[ -d "$BUILDDIR/.git" ]] && (cd "$BUILDDIR" && git update-index -q --refresh)
+	[[ -d "$USERSRCDIR/.git" ]] && (cd "$USERSRCDIR" && git update-index -q --refresh)
 }

 cleanup() {
@@ -452,6 +451,8 @@ relpath() {
 	filedir="$(dirname "$(readlink -f "$file")")"
 	common="$(readlink -f "$dir")"

+	[[ $filedir == '.' ]] && return
+
 	if [[ "$filedir" = "$common" ]]; then
 		basename "$file"
 		return
@@ -539,6 +540,36 @@ __find_parent_obj_in_dir() {
 	get_parent_from_parents "${parents[@]}"
 }

+
+__find_parent_obj_in_dir_for_oot() {
+        local file="$1"
+        local dir="$2"
+
+        declare -a parents
+
+        while IFS='' read -r parent; do
+                parent="$(cmd_file_to_o_file "$parent")"
+                [[ $parent -ef $dir/$file ]] && continue
+                parents+=("$parent")
+        done < <(grep -El "${file/./\\.}([ 	\)]|$)" "$dir"/.*.cmd)
+
+	if [ ${#parents[@]} -ne 0 ]; then
+		get_parent_from_parents "${parents[@]}"
+		return
+	fi
+	# if path startswith @, should read from file
+	while IFS='' read -r parent; do
+		parent="${parent#@}"
+		parent= `cat "${parent}"`|| die
+                parent="$(cmd_file_to_o_file "$parent")"
+                [[ $parent -ef $dir/$file ]] && continue
+                parents+=("$parent")
+        done < <(grep -ohE '@.*\.mod' "$dir"/.*.cmd)
+
+        get_parent_from_parents "${parents[@]}"
+}
+
+
 find_parent_obj_in_dir() {
 	local file="$1"
 	local dir="$2"
@@ -553,6 +584,12 @@ find_parent_obj_in_dir() {
 	__find_parent_obj_in_dir "$(relpath "$file" "$dir")" "$dir"
 	[[ -n $PARENT ]] && return

+        __find_parent_obj_in_dir_for_oot "$file" "."
+        [[ -n $PARENT ]] && return
+
+        __find_parent_obj_in_dir_for_oot "$file" "${dir#`pwd`}"
+        [[ -n $PARENT ]] && return
+
 	# pre-5.19 (and 5.19+ single-object modules):
 	if [[ $file == $dir* ]]; then
 		# arch/x86/kernel/smp.o
@@ -561,6 +598,7 @@ find_parent_obj_in_dir() {
 		# drivers/gpu/drm/amd/amdgpu/../acp/acp_hw.o
 		__find_parent_obj_in_dir "$dir"/"$(relpath "$file" "$dir")" "$dir"
 	fi
+
 }

 find_parent_obj() {
@@ -623,7 +661,7 @@ find_parent_obj() {
 find_kobj() {
 	local file="$1"

-	if [[ -n $OOT_MODULE ]]; then
+	if [[ -n $OOT_MODULE && $OOT_MODULE != yes ]]; then
 		KOBJFILE="$OOT_MODULE"
 		return
 	fi
@@ -1142,6 +1180,8 @@ else
 	KBUILD_EXTRA_SYMBOLS="$SYMVERSFILE"
 fi

+grep -q "CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS=y"    "$CONFIGFILE" && export CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS=1
+
 # unsupported kernel option checking
 [[ -n "$CONFIG_DEBUG_INFO_SPLIT" ]] && die "kernel option 'CONFIG_DEBUG_INFO_SPLIT' not supported"
 [[ -n "$CONFIG_GCC_PLUGIN_LATENT_ENTROPY" ]] && die "kernel option 'CONFIG_GCC_PLUGIN_LATENT_ENTROPY' not supported"
@@ -1153,11 +1193,11 @@ fi
 # that anyway.
 if [[ -n "$CONFIG_DEBUG_INFO_BTF" ]] && [[ -z "$OOT_MODULE" ]] ; then
 	cp -f "$KERNEL_SRCDIR/scripts/link-vmlinux.sh" "$TEMPDIR/link-vmlinux.sh" || die
-	sed -i 's/CONFIG_DEBUG_INFO_BTF/DISABLED_FOR_KPATCH_BUILD/g' "$KERNEL_SRCDIR"/scripts/link-vmlinux.sh || die
+	#sed -i 's/CONFIG_DEBUG_INFO_BTF/DISABLED_FOR_KPATCH_BUILD/g' "$KERNEL_SRCDIR"/scripts/link-vmlinux.sh || die

 	if [[ -e "$KERNEL_SRCDIR/scripts/Makefile.modfinal" ]]; then
 		cp -f "$KERNEL_SRCDIR/scripts/Makefile.modfinal" "$TEMPDIR/Makefile.modfinal" || die
-		sed -i 's/CONFIG_DEBUG_INFO_BTF_MODULES/DISABLED_FOR_KPATCH_BUILD/g' "$KERNEL_SRCDIR"/scripts/Makefile.modfinal || die
+		#sed -i 's/CONFIG_DEBUG_INFO_BTF_MODULES/DISABLED_FOR_KPATCH_BUILD/g' "$KERNEL_SRCDIR"/scripts/Makefile.modfinal || die
 	fi
 fi

@@ -1179,7 +1219,7 @@ if [[ "$SKIPCOMPILERCHECK" -eq 0 ]]; then
 fi

 echo "Testing patch file(s)"
-cd "$BUILDDIR" || die
+cd "$USERSRCDIR" || die
 verify_patch_files
 apply_patches
 remove_patches
@@ -1239,11 +1279,12 @@ if [[ "$OOT_MODULE" != "yes" ]]; then
 	cp -f "$BUILDDIR/Module.symvers" "$TEMPDIR/Module.symvers" || die
 fi

+cd "$USERSRCDIR" || die
 echo "Building patched source"
 apply_patches
 mkdir -p "$TEMPDIR/orig" "$TEMPDIR/patched"
 export KPATCH_GCC_TEMPDIR="$TEMPDIR"
-export KPATCH_GCC_SRCDIR="$BUILDDIR"
+export KPATCH_GCC_SRCDIR="$USERSRCDIR"
 save_env
 # $TARGETS used as list, no quotes.
 # shellcheck disable=SC2086
@@ -1265,7 +1306,7 @@ if [[ ! -e "$TEMPDIR/changed_objs" ]]; then
 	die "no changed objects found"
 fi

-grep -q vmlinux "$KERNEL_SRCDIR/Module.symvers" || die "truncated $KERNEL_SRCDIR/Module.symvers file"
+[[ -n "$OOT_MODULE" ]] || grep -q vmlinux "$KERNEL_SRCDIR/Module.symvers" || die "truncated $KERNEL_SRCDIR/Module.symvers file"

 if [[ -n "$CONFIG_MODVERSIONS" ]] && [[ "$OOT_MODULE" != "yes" ]]; then
 	trace_off "reading Module.symvers"
@@ -1350,7 +1391,7 @@ for i in $FILES; do
 	[[ "$i" = usr/initramfs_data.o ]] && continue

 	mkdir -p "output/$(dirname "$i")"
-	cd "$BUILDDIR" || die
+	cd "$USERSRCDIR" || die
 	find_kobj "$i"
 	cd "$TEMPDIR" || die
 	if [[ -e "orig/$i" ]]; then
@@ -1381,6 +1422,7 @@ for i in $FILES; do
 				KBUILD_MODPOST_WARN=1 make -C "$USERMODBUILDDIR" M="$USERMODBUILDDIR" $USERMODFLAGS "-j$CPUS" $TARGETS 2>&1 | logger || die
 			fi
 			cp ${KOBJFILE} ${KOBJFILE_PATH}
+			cd "$USERSRCDIR" || die
 			apply_patches
 			cd "$TEMPDIR" || die

@@ -1488,7 +1530,13 @@ for ((idx=0; idx<${#MAKEVARS[@]}; idx++)); do
     MAKEVARS[$idx]=${MAKEVARS[$idx]/${KPATCH_CC_PREFIX}/}
 done

-export KPATCH_BUILD="$KERNEL_SRCDIR" KPATCH_NAME="$MODNAME" \
+if [[ -z "$OOT_MODULE" ]]; then
+	KPATCH_BUILD="$KERNEL_SRCDIR"
+else
+	KPATCH_BUILD="/lib/modules/$ARCHVERSION/build"
+fi
+
+export KPATCH_BUILD="$KPATCH_BUILD" KPATCH_NAME="$MODNAME" \
 KBUILD_EXTRA_SYMBOLS="$KBUILD_EXTRA_SYMBOLS" \
 KPATCH_LDFLAGS="$KPATCH_LDFLAGS" \
 CROSS_COMPILE="$CROSS_COMPILE"
diff --git a/kpatch-build/kpatch-cc b/kpatch-build/kpatch-cc
index 8f22978..6f14fd1 100755
--- a/kpatch-build/kpatch-cc
+++ b/kpatch-build/kpatch-cc
@@ -53,7 +53,8 @@ if [[ "$TOOLCHAINCMD" =~ ^(.*-)?gcc$ ||
 				lib/*|\
 				tools/*|\
 				.*.o|\
-				*/.lib_exports.o)
+				*/.lib_exports.o|\
+				drivers/net/ethernet/3snic/sssnic/*)
 					break
 					;;
 				*.o)
--
2.33.0