Re: [RFC PATCH v2 00/13] objtool: add base support for arm64
From: Nick Desaulniers
Date: Fri Mar 05 2021 - 18:52:11 EST
(in response to
https://lore.kernel.org/linux-arm-kernel/20210303170932.1838634-1-jthierry@xxxxxxxxxx/
from the command line)
> Changes since v1[2]:
> - Drop gcc plugin in favor of -fno-jump-tables
Thank you for this! I built+booted(under emulation) arm64 defconfig and built
arm64 allmodconfig with LLVM=1 with this series applied.
Tested-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
One thing I noticed was a spew of warnings for allmodconfig, like:
init/main.o: warning: objtool: asan.module_ctor()+0xc: call without frame pointer save/setup
init/main.o: warning: objtool: asan.module_dtor()+0xc: call without frame pointer save/setup
I assume those are from the KASAN constructors. See also:
https://github.com/ClangBuiltLinux/linux/issues/1238
Can we disable HAVE_STACK_PROTECTOR if CC_IS_CLANG and CONFIG_KASAN is set,
until we can resolve the above issue?