From 24b31c9428706b76be4bdffcc586d7a19fdc4207 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Sun, 2 Dec 2012 17:42:17 +0000
Subject: kernel: fix stripping symbol exports

SVN-Revision: 34458
---
 include/kernel-build.mk | 30 +++++++++++++++++++++++-------
 1 file changed, 23 insertions(+), 7 deletions(-)

(limited to 'include')

diff --git a/include/kernel-build.mk b/include/kernel-build.mk
index cf8737c8ee..2ae80e54e2 100644
--- a/include/kernel-build.mk
+++ b/include/kernel-build.mk
@@ -67,24 +67,40 @@ define BuildKernel
 	$(Kernel/Prepare)
 	touch $$@
 
-  $(KERNEL_BUILD_DIR)/symtab.txt: FORCE
+  $(KERNEL_BUILD_DIR)/symtab.h: FORCE
+	rm -f $(KERNEL_BUILD_DIR)/symtab.h
+	touch $(KERNEL_BUILD_DIR)/symtab.h
+	+$(MAKE) $(KERNEL_MAKEOPTS) vmlinux
 	find $(LINUX_DIR) $(STAGING_DIR_ROOT)/lib/modules -name \*.ko | \
 		xargs $(TARGET_CROSS)nm | \
 		awk '$$$$1 == "U" { print $$$$2 } ' | \
-		sort -u > $$@
-
-  $(KERNEL_BUILD_DIR)/symtab.h: $(KERNEL_BUILD_DIR)/symtab.txt
+		sort -u > $(KERNEL_BUILD_DIR)/mod_symtab.txt
+	$(TARGET_CROSS)nm -n $(LINUX_DIR)/vmlinux.o | grep ' r __ksymtab' | sed -e 's,........ r __ksymtab_,,' > $(KERNEL_BUILD_DIR)/kernel_symtab.txt
+	grep -f $(KERNEL_BUILD_DIR)/mod_symtab.txt $(KERNEL_BUILD_DIR)/kernel_symtab.txt > $(KERNEL_BUILD_DIR)/sym_include.txt
+	grep -vf $(KERNEL_BUILD_DIR)/mod_symtab.txt $(KERNEL_BUILD_DIR)/kernel_symtab.txt > $(KERNEL_BUILD_DIR)/sym_exclude.txt
 	( \
 		echo '#define SYMTAB_KEEP \'; \
-		cat $(KERNEL_BUILD_DIR)/symtab.txt | \
+		cat $(KERNEL_BUILD_DIR)/sym_include.txt | \
 			awk '{print "*(__ksymtab." $$$$1 ") \\" }'; \
 		echo; \
 		echo '#define SYMTAB_KEEP_GPL \'; \
-		cat $(KERNEL_BUILD_DIR)/symtab.txt | \
+		cat $(KERNEL_BUILD_DIR)/sym_include.txt | \
 			awk '{print "*(__ksymtab_gpl." $$$$1 ") \\" }'; \
 		echo; \
 		echo '#define SYMTAB_KEEP_STR \'; \
-		cat $(KERNEL_BUILD_DIR)/symtab.txt | \
+		cat $(KERNEL_BUILD_DIR)/sym_include.txt | \
+			awk '{print "*(__ksymtab_strings." $$$$1 ") \\" }'; \
+		echo; \
+		echo '#define SYMTAB_DISCARD \'; \
+		cat $(KERNEL_BUILD_DIR)/sym_exclude.txt | \
+			awk '{print "*(__ksymtab." $$$$1 ") \\" }'; \
+		echo; \
+		echo '#define SYMTAB_DISCARD_GPL \'; \
+		cat $(KERNEL_BUILD_DIR)/sym_exclude.txt | \
+			awk '{print "*(__ksymtab_gpl." $$$$1 ") \\" }'; \
+		echo; \
+		echo '#define SYMTAB_DISCARD_STR \'; \
+		cat $(KERNEL_BUILD_DIR)/sym_exclude.txt | \
 			awk '{print "*(__ksymtab_strings." $$$$1 ") \\" }'; \
 		echo; \
 	) > $$@
-- 
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