linux/arch/x86/purgatory
Masahiro Yamada 893ab00439 kbuild: remove cc-option test of -fno-stack-protector
Some Makefiles already pass -fno-stack-protector unconditionally.
For example, arch/arm64/kernel/vdso/Makefile, arch/x86/xen/Makefile.

No problem report so far about hard-coding this option. So, we can
assume all supported compilers know -fno-stack-protector.

GCC 4.8 and Clang support this option (https://godbolt.org/z/_HDGzN)

Get rid of cc-option from -fno-stack-protector.

Remove CONFIG_CC_HAS_STACKPROTECTOR_NONE, which is always 'y'.

Note:
arch/mips/vdso/Makefile adds -fno-stack-protector twice, first
unconditionally, and second conditionally. I removed the second one.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
2020-07-07 11:13:10 +09:00
..
.gitignore x86/purgatory: Fail the build if purgatory.ro has missing symbols 2020-03-17 15:59:12 +01:00
entry64.S x86/asm/purgatory: Start using annotations 2019-10-18 10:48:43 +02:00
Makefile kbuild: remove cc-option test of -fno-stack-protector 2020-07-07 11:13:10 +09:00
purgatory.c x86/kdump: Remove the backup region handling 2019-11-14 18:24:43 +01:00
setup-x86_64.S x86/asm/purgatory: Start using annotations 2019-10-18 10:48:43 +02:00
stack.S x86/asm/purgatory: Start using annotations 2019-10-18 10:48:43 +02:00