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-rw-r--r--Config.in9
-rw-r--r--include/kernel-build.mk14
2 files changed, 23 insertions, 0 deletions
diff --git a/Config.in b/Config.in
index f9375be0a2..61a46b4532 100644
--- a/Config.in
+++ b/Config.in
@@ -155,6 +155,15 @@ menu "Global build settings"
help
This removes all ipkg/opkg status data files from the target directory before building the root fs
+ config COLLECT_KERNEL_DEBUG
+ bool
+ prompt "Colllect kernel debug information"
+ select KERNEL_DEBUG_INFO
+ default n
+ help
+ This collects debugging symbols from the kernel and all compiled modules.
+ Useful for release builds, so that kernel issues can be debugged offline later.
+
comment "Kernel build options"
config KERNEL_DEBUG_FS
diff --git a/include/kernel-build.mk b/include/kernel-build.mk
index 7c5d1fbe9c..648e65848a 100644
--- a/include/kernel-build.mk
+++ b/include/kernel-build.mk
@@ -44,6 +44,19 @@ define Download/kernel
MD5SUM:=$(LINUX_KERNEL_MD5SUM)
endef
+ifdef CONFIG_COLLECT_KERNEL_DEBUG
+ define Kernel/CollectDebug
+ rm -rf $(KERNEL_BUILD_DIR)/debug
+ mkdir -p $(KERNEL_BUILD_DIR)/debug/modules
+ $(CP) $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/debug/
+ -$(CP) \
+ $(STAGING_DIR_ROOT)/lib/modules/$(LINUX_VERSION)/* \
+ $(KERNEL_BUILD_DIR)/debug/modules/
+ $(FIND) $(KERNEL_BUILD_DIR)/debug -type f | $(XARGS) $(KERNEL_CROSS)strip --only-keep-debug
+ $(TAR) c -C $(KERNEL_BUILD_DIR) debug | bzip2 -c -9 > $(BIN_DIR)/kernel-debug.tar.bz2
+ endef
+endif
+
define BuildKernel
$(if $(QUILT),$(Build/Quilt))
$(if $(LINUX_SITE),$(call Download,kernel))
@@ -86,6 +99,7 @@ define BuildKernel
$(LINUX_DIR)/.image: $(STAMP_CONFIGURED) $(if $(CONFIG_STRIP_KERNEL_EXPORTS),$(KERNEL_BUILD_DIR)/symtab.h) FORCE
$(Kernel/CompileImage)
+ $(Kernel/CollectDebug)
touch $$@
mostlyclean: FORCE