This is a note to let you know that I've just added the patch titled
riscv: disable generation of unwind tables
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
riscv-disable-generation-of-unwind-tables.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 2f394c0e7d1129a35156e492bc8f445fb20f43ac Mon Sep 17 00:00:00 2001
From: Andreas Schwab <schwab@xxxxxxx>
Date: Wed, 1 Feb 2023 10:29:45 +0100
Subject: riscv: disable generation of unwind tables
From: Andreas Schwab <schwab@xxxxxxx>
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@xxxxxxx>
Link: https://lore.kernel.org/r/mvmzg9xybqu.fsf@xxxxxxx
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Palmer Dabbelt <palmer@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/riscv/Makefile | 3 +++
1 file changed, 3 insertions(+)
--- a/arch/riscv/Makefile
+++ b/arch/riscv/Makefile
@@ -80,6 +80,9 @@ 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)
Patches currently in stable-queue which might be from schwab@xxxxxxx are
queue-6.1/riscv-disable-generation-of-unwind-tables.patch
