Commit 627072b0 authored Oct 19, 2012 by Chris Metcalf

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 <cmetcalf@tilera.com>
Cc: stable@vger.kernel.org

parent 6f0c0580

arch/tile/Makefile

+4 −0

Original line number	Diff line number	Diff line
		@@ -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