From: Chris Metcalf Date: Fri, 19 Oct 2012 15:43:11 +0000 (-0400) Subject: arch/tile: avoid generating .eh_frame information in modules X-Git-Tag: firefly_0821_release~7541^2~443 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=e114f9effa5cf00565b5b051d9e96a8df2c8a4b3;p=firefly-linux-kernel-4.4.55.git arch/tile: avoid generating .eh_frame information in modules commit 627072b06c362bbe7dc256f618aaa63351f0cfe6 upstream. The tile tool chain uses the .eh_frame information for backtracing. The vmlinux build drops any .eh_frame sections at link time, but when present in kernel modules, it causes a module load failure due to the presence of unsupported pc-relative relocations. When compiling to use compiler feedback support, the compiler by default omits .eh_frame information, so we don't see this problem. But when not using feedback, we need to explicitly suppress the .eh_frame. Signed-off-by: Chris Metcalf Signed-off-by: Greg Kroah-Hartman --- diff --git a/arch/tile/Makefile b/arch/tile/Makefile index 17acce70569b..04c637c4eb43 100644 --- a/arch/tile/Makefile +++ b/arch/tile/Makefile @@ -26,6 +26,10 @@ $(error Set TILERA_ROOT or CROSS_COMPILE when building $(ARCH) on $(HOST_ARCH)) endif endif +# The tile compiler may emit .eh_frame information for backtracing. +# In kernel modules, this causes load failures due to unsupported relocations. +KBUILD_CFLAGS += -fno-asynchronous-unwind-tables + ifneq ($(CONFIG_DEBUG_EXTRA_FLAGS),"") KBUILD_CFLAGS += $(CONFIG_DEBUG_EXTRA_FLAGS) endif