From 627072b06c362bbe7dc256f618aaa63351f0cfe6 Mon Sep 17 00:00:00 2001 From: Chris Metcalf Date: Fri, 19 Oct 2012 11:43:11 -0400 Subject: [PATCH] arch/tile: avoid generating .eh_frame information in modules 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 Cc: stable@vger.kernel.org --- arch/tile/Makefile | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/tile/Makefile b/arch/tile/Makefile index 55640cf92597..3d15364c6071 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 -- GitLab