[PATCH 1/1] efi_loader: make .data section of *_efi.so files RW

[Ilias Apalodimas]

Hi Heinrich 

On Wed, Jan 04, 2023 at 11:43:08PM +0100, Heinrich Schuchardt wrote:
> When building with binutils 2.39 warnings
> 
>     *_efi.so has a LOAD segment with RWX permissions
> 
> occur.
> 
> Use SHF_WRITE | SHF_ALLOC as section flags for the .data section.
> 
> Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt at canonical.com>
> ---
>  arch/arm/lib/elf_aarch64_efi.lds | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm/lib/elf_aarch64_efi.lds b/arch/arm/lib/elf_aarch64_efi.lds
> index ffc6f6e604..3e3da47d6a 100644
> --- a/arch/arm/lib/elf_aarch64_efi.lds
> +++ b/arch/arm/lib/elf_aarch64_efi.lds
> @@ -7,6 +7,12 @@
>  
>  OUTPUT_FORMAT("elf64-littleaarch64", "elf64-littleaarch64", "elf64-littleaarch64")
>  OUTPUT_ARCH(aarch64)
> +
> +PHDRS
> +{
> +	data PT_LOAD FLAGS(3); /* SHF_WRITE | SHF_ALLOC */
> +}
> +
>  ENTRY(_start)
>  SECTIONS
>  {
> @@ -49,7 +55,7 @@ SECTIONS
>  		. = ALIGN(512);
>  		_bss_end = .;
>  		_edata = .;
> -	}
> +	} :data

Is this only to signal the end of the .data section?  If so let's get rid
of it since no other section has that 

>  	_data_size = _edata - _data;
>  	.rela.dyn : { *(.rela.dyn) }
>  	.rela.plt : { *(.rela.plt) }
> -- 
> 2.37.2
> 

other than that 
Reviewed-by: Ilias Apalodimas <ilias.apalodimas at linaro.org>