Commit 845a3708 authored Feb 01, 2023 by Andreas Schwab Committed by Greg Kroah-Hartman Feb 22, 2023

riscv: disable generation of unwind tables



commit 2f394c0e7d1129a35156e492bc8f445fb20f43ac upstream.

GCC 13 will enable -fasynchronous-unwind-tables by default on riscv.  In
the kernel, we don't have any use for unwind tables yet, so disable them.
More importantly, the .eh_frame section brings relocations
(R_RISC_32_PCREL, R_RISCV_SET{6,8,16}, R_RISCV_SUB{6,8,16}) into modules
that we are not prepared to handle.

Signed-off-by: Andreas Schwab <schwab@suse.de>
Link: https://lore.kernel.org/r/mvmzg9xybqu.fsf@suse.de


Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent c89af52d

arch/riscv/Makefile

+3 −0

Original line number	Diff line number	Diff line
		@@ -75,6 +75,9 @@ ifeq ($(CONFIG_PERF_EVENTS),y)
		KBUILD_CFLAGS += -fno-omit-frame-pointer
		endif

		# Avoid generating .eh_frame sections.
		KBUILD_CFLAGS += -fno-asynchronous-unwind-tables -fno-unwind-tables

		KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax)
		KBUILD_AFLAGS_MODULE += $(call as-option,-Wa$(comma)-mno-relax)