linux-kernel - Re: [RESEND PATCH] x86/tools/relocs: add _

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Date:   Fri, 25 Jun 2021 09:17:40 -0700
From:   "H. Peter Anvin" <hpa@...or.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Borislav Petkov <bp@...en8.de>
CC:     x86@...nel.org, Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [RESEND PATCH] x86/tools/relocs: add __printf attribute to die()

%zu wouldn't DTRT for cross build.

On June 24, 2021 7:44:02 AM PDT, Greg Kroah-Hartman <gregkh@...uxfoundation.org> wrote:
>On Thu, Jun 24, 2021 at 02:32:43PM +0200, Borislav Petkov wrote:
>> On Thu, Jun 24, 2021 at 01:58:03PM +0200, Greg Kroah-Hartman wrote:
>> > There are a number of printf "mismatches" in the use of die() in
>> > x86/tools/relocs.c.  Fix them up and add the printf attribute to
>the
>> > reloc.h header file to prevent them from ever coming back.
>> > 
>> > Cc: Thomas Gleixner <tglx@...utronix.de>
>> > Cc: Ingo Molnar <mingo@...hat.com>
>> > Cc: Borislav Petkov <bp@...en8.de>
>> > Cc: "H. Peter Anvin" <hpa@...or.com>
>> > Cc: linux-kernel@...r.kernel.org
>> > Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
>> > ---
>> >  arch/x86/tools/relocs.c | 21 +++++++++++----------
>> >  arch/x86/tools/relocs.h |  1 +
>> >  2 files changed, 12 insertions(+), 10 deletions(-)
>> > 
>> > Originally sent back in Feb, but it seems to have been missed:
>> >
>	https://lore.kernel.org/r/20210227095356.603513-1-gregkh@linuxfoundation.org
>> > 
>> > 
>> > diff --git a/arch/x86/tools/relocs.c b/arch/x86/tools/relocs.c
>> > index ce7188cbdae5..c3105a8c6cde 100644
>> > --- a/arch/x86/tools/relocs.c
>> > +++ b/arch/x86/tools/relocs.c
>> > @@ -389,7 +389,8 @@ static void read_ehdr(FILE *fp)
>> >  		Elf_Shdr shdr;
>> >  
>> >  		if (fseek(fp, ehdr.e_shoff, SEEK_SET) < 0)
>> > -			die("Seek to %d failed: %s\n", ehdr.e_shoff, strerror(errno));
>> > +			die("Seek to %d failed: %s\n",
>> > +			    (int)ehdr.e_shoff, strerror(errno));
>> 
>> Instead of casting all those, I think you should use %zu as,
>apparently,
>> we're using unsigned types for Elf{32,64}_Off and Elf{32,64}_Xword,
>etc.
>
>Odd, I thought I tried that and something did not work.  Let me try it
>again...

-- 
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