Re: [PATCH 07/11] s390/boot: vmlinux.lds.S: Handle DWARF debug sections

Fangrui Song
2024-02-13T05:33:15Z

On Wed, Feb 7, 2024 at 4:15 PM Nathan Chancellor <nathan@kernel.org> wrote:
>
> When building with CONFIG_LD_ORPHAN_WARN after selecting
> CONFIG_ARCH_HAS_LD_ORPHAN_WARN, there are several series of warnings for
> each file in arch/s390/boot due to the boot linker script not handling
> the DWARF debug sections:
>
> s390-linux-ld: warning: orphan section `.debug_line' from `arch/s390/boot/head.o' being placed in section `.debug_line'
> s390-linux-ld: warning: orphan section `.debug_info' from `arch/s390/boot/head.o' being placed in section `.debug_info'
> s390-linux-ld: warning: orphan section `.debug_abbrev' from `arch/s390/boot/head.o' being placed in section `.debug_abbrev'
> s390-linux-ld: warning: orphan section `.debug_aranges' from `arch/s390/boot/head.o' being placed in section `.debug_aranges'
> s390-linux-ld: warning: orphan section `.debug_str' from `arch/s390/boot/head.o' being placed in section `.debug_str'
>
> include/asm-generic/vmlinux.lds.h has a macro for DWARF debug sections
> named DWARF_DEBUG, use it to clear up the warnings.
>
> Signed-off-by: Nathan Chancellor <nathan@kernel.org>
> ---
> arch/s390/boot/vmlinux.lds.S | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/arch/s390/boot/vmlinux.lds.S b/arch/s390/boot/vmlinux.lds.S
> index ff8c62d84f98..83af17bfe630 100644
> --- a/arch/s390/boot/vmlinux.lds.S
> +++ b/arch/s390/boot/vmlinux.lds.S
> @@ -122,6 +122,8 @@ SECTIONS
> }
> _end = .;
>
> + DWARF_DEBUG
> +
> /*
> * Sections that should stay zero sized, which is safer to
> * explicitly check instead of blindly discarding.
>
> --
> 2.43.0
>

Reviewed-by: Fangrui Song <maskray@google.com>

--
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