Re: [PATCH] riscv: Enable ELF-ASLR for riscv

[Alex Ghiti]

Hi Guo,

Le 7/9/20 à 12:38 AM, guoren@xxxxxxxxxx a écrit :
> From: Guo Ren <guoren@xxxxxxxxxxxxxxxxx>
>
> Let riscv enable randomizes the stack, heap and binary images of
> ELF binaries. Seems it's ok at all after qemu & chip test and
> there is no founded side effect.
>
> So just simply select ARCH_HAS_ELF_RANDOMIZE :)
>
> Signed-off-by: Guo Ren <guoren@xxxxxxxxxxxxxxxxx>
> Cc: Palmer Dabbelt <palmerdabbelt@xxxxxxxxxx>
> Cc: Paul Walmsley <paul.walmsley@xxxxxxxxxx>
> Cc: Zong Li <zong.li@xxxxxxxxxx>
> Cc: Greentime Hu <green.hu@xxxxxxxxx>
> ---
>   arch/riscv/Kconfig | 1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
> index 91bfc6c..eed6647 100644
> --- a/arch/riscv/Kconfig
> +++ b/arch/riscv/Kconfig
> @@ -20,6 +20,7 @@ config RISCV
>   	select ARCH_HAS_GIGANTIC_PAGE
>   	select ARCH_HAS_MMIOWB
>   	select ARCH_HAS_PTE_SPECIAL
> +	select ARCH_HAS_ELF_RANDOMIZE
>   	select ARCH_HAS_SET_DIRECT_MAP
>   	select ARCH_HAS_SET_MEMORY
>   	select ARCH_HAS_STRICT_KERNEL_RWX if MMU

Actually it is already the case: ARCH_HAS_ELF_RANDOMIZE is already 
selected by ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT.

Thanks,

Alex