linux-kernel - Re: [PATCH v2] x86: Avoid relocation information in final vmlinux

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Date:   Fri, 25 Nov 2022 20:25:29 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Petr Pavlu <petr.pavlu@...e.com>
Cc:     tglx@...utronix.de, mingo@...hat.com, dave.hansen@...ux.intel.com,
        x86@...nel.org, hpa@...or.com, nicolas@...sle.eu,
        masahiroy@...nel.org, kirill.shutemov@...ux.intel.com,
        tony.luck@...el.com, michael.roth@....com, nathan@...nel.org,
        ndesaulniers@...gle.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] x86: Avoid relocation information in final vmlinux

On Tue, Sep 27, 2022 at 10:46:32AM +0200, Petr Pavlu wrote:
> diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/Makefile
> index 35ce1a64068b..eba7709d75ae 100644
> --- a/arch/x86/boot/compressed/Makefile
> +++ b/arch/x86/boot/compressed/Makefile
> @@ -120,14 +120,12 @@ $(obj)/vmlinux.bin: vmlinux FORCE
>  
>  targets += $(patsubst $(obj)/%,%,$(vmlinux-objs-y)) vmlinux.bin.all vmlinux.relocs
>  
> -CMD_RELOCS = arch/x86/tools/relocs
> -quiet_cmd_relocs = RELOCS  $@
> -      cmd_relocs = $(CMD_RELOCS) $< > $@;$(CMD_RELOCS) --abs-relocs $<
> -$(obj)/vmlinux.relocs: vmlinux FORCE
> -	$(call if_changed,relocs)
> +# vmlinux.relocs is created by the vmlinux postlink step.
> +vmlinux.relocs: vmlinux
> +	@true
>  
>  vmlinux.bin.all-y := $(obj)/vmlinux.bin
> -vmlinux.bin.all-$(CONFIG_X86_NEED_RELOCS) += $(obj)/vmlinux.relocs
> +vmlinux.bin.all-$(CONFIG_X86_NEED_RELOCS) += vmlinux.relocs

Any particular reason why vmlinux.relocs must move out of $(obj)/ where
it resides now?

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette