linux-kernel - Re: [PATCH v3 4/8] tracing: recordmcount.pl Objcopy check should disable local reference correctly

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1256763560.26028.1825.camel@gandalf.stny.rr.com>
Date:	Wed, 28 Oct 2009 16:59:20 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Li Hong <lihong.hi@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 4/8] tracing: recordmcount.pl Objcopy check should
 disable local reference correctly

On Wed, 2009-10-28 at 13:04 +0800, Li Hong wrote:
> >From ceb80d8ba4fc55916c5f88d8c0a7655b869702cf Mon Sep 17 00:00:00 2001
> From: Li Hong <lihong.hi@...il.com>
> Date: Tue, 27 Oct 2009 12:41:22 +0800
> Subject: [PATCH] tracing: recordmcount.pl Objcopy check should disable local reference correctly
> 
> Use a function to do objcopy version check. Disable the local reference if
> copy can't support it. Remove some unused variables.

Note, a lot of your patches have whitespace issues (white space at the
end of the line, etc). I've cleaned them up, but you want to be more
careful next time.

> 
> Signed-off-by: Li Hong <lihong.hi@...il.com>
> ---
>  scripts/recordmcount.pl |   55 ++++++++++++++++++++++------------------------
>  1 files changed, 26 insertions(+), 29 deletions(-)
> 
> diff --git a/scripts/recordmcount.pl b/scripts/recordmcount.pl
> index 8ff9eab..1de9826 100755
> --- a/scripts/recordmcount.pl
> +++ b/scripts/recordmcount.pl
> @@ -158,6 +158,30 @@ my $function_regex;	# Find the name of a function
>  my $mcount_regex;	# Find the call site to mcount (return offset)
>  my $alignment;		# The .align value to use for $mcount_section
>  my $section_type;	# Section header plus possible alignment command
> +my $can_use_local = 0; 	# If we can use local function references
> +
> +##
> +# check_objcopy - whether objcopy supports --globalize-symbols
> +#
> +#  --globalize-symbols came out in 2.17, we must test the version
> +#  of objcopy, and if it is less than 2.17, then we can not
> +#  record local functions.
> +sub check_objcopy
> +{
> +    open (IN, "$objcopy --version |") or die "error running $objcopy";
> +    while (<IN>) {
> +        if (/objcopy.*\s(\d+)\.(\d+)/) {
> +            $can_use_local = 1 if ($1 > 2 || ($1 == 2 && $2 >= 17)); 
> +            last;
> +        }
> +    }
> +    close (IN);
> +
> +    if (!$can_use_local) {
> +        print STDERR "WARNING: could not find objcopy version or version is less than 2.17.\n" .
> +	"\tLocal function references is disabled.\n"  

Missing a ';' above. I've fixed this too, and broke the first line up
too, to be less than 80 characters.

Thanks,

-- Steve



> +    }
> +}
>  
>  if ($arch eq "x86") {
>      if ($bits == 64) {


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/