Re: [patch V4 part 1 19/36] x86/entry: Exclude low level entry code from sanitizing

[Alexandre Chartre]

On 5/5/20 3:16 PM, Thomas Gleixner wrote:
> The sanitizers are not really applicable to the fragile low level entry
> code. code. Entry code needs to carefully setup a normal 'runtime'

typo: code. code.

Reviewed-by: Alexandre Chartre <alexandre.chartre@xxxxxxxxxx>

alex.


> environment.
>
> Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> ---
>   arch/x86/entry/Makefile |    8 ++++++++
>   1 file changed, 8 insertions(+)
>
> --- a/arch/x86/entry/Makefile
> +++ b/arch/x86/entry/Makefile
> @@ -3,6 +3,14 @@
>   # Makefile for the x86 low level entry code
>   #
>   
> +KASAN_SANITIZE := n
> +UBSAN_SANITIZE := n
> +KCOV_INSTRUMENT := n
> +
> +CFLAGS_REMOVE_common.o = $(CC_FLAGS_FTRACE) -fstack-protector -fstack-protector-strong
> +CFLAGS_REMOVE_syscall_32.o = $(CC_FLAGS_FTRACE) -fstack-protector -fstack-protector-strong
> +CFLAGS_REMOVE_syscall_64.o = $(CC_FLAGS_FTRACE) -fstack-protector -fstack-protector-strong
> +
>   OBJECT_FILES_NON_STANDARD_entry_64_compat.o := y
>   
>   CFLAGS_syscall_64.o		+= $(call cc-option,-Wno-override-init,)