batman-adv-legacy: update symbols from "batadv_" to "batadv_legacy_"

Signed-off-by: Linus Lüssing <[email protected]>

Makefile

@@ -35,6 +35,9 @@ ifeq ($(shell cd $(KERNELPATH) && pwd),)
 $(warning $(KERNELPATH) is missing, please set KERNELPATH)
 endif
 
+OBJCOPY ?= objcopy
+OBJDUMP ?= objdump
+
 export KERNELPATH
 RM ?= rm -f
 
@@ -49,11 +52,21 @@ ccflags-y += -DBATADV_SOURCE_VERSION=\"$(REVISION)\"
 endif
 include $(PWD)/Makefile.kbuild
 
-all: config
+all: build updatesyms
+
+build: config
 	$(MAKE) -C $(KERNELPATH) M=$(PWD) PWD=$(PWD) modules
 
+updatesyms:
+	@if ! $(OBJDUMP) -j .init.text -t batman-adv-legacy.ko| grep -q "batadv_legacy_init"; then \
+		$(OBJDUMP) -t batman-adv-legacy.ko | grep batadv_ | grep -v "batadv_legacy" | \
+			sed "s/.* \([^ ]*\)batadv_\([^ ]*\)$$/\1batadv_\2 \1batadv_legacy_\2/" \
+				>> $(PWD)/updated-syms.txt; \
+		$(OBJCOPY) --redefine-syms=$(PWD)/updated-syms.txt $(PWD)/batman-adv-legacy.ko; \
+	fi
+
 clean:
-	$(RM) compat-autoconf.h*
+	$(RM) compat-autoconf.h* updated-syms.txt
 	$(MAKE) -C $(KERNELPATH) M=$(PWD) PWD=$(PWD) clean
 
 install: config
@@ -63,4 +76,4 @@ install: config
 config:
 	$(PWD)/gen-compat-autoconf.sh $(PWD)/compat-autoconf.h
 
-.PHONY: all clean install config
+.PHONY: all build updatesyms clean install config