linux-kernel - Re: [PATCH v2 2/6] mips dynamic function tracer support

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Message-ID: <alpine.DEB.2.00.0905291122260.31247@gandalf.stny.rr.com>
Date:	Fri, 29 May 2009 11:24:09 -0400 (EDT)
From:	Steven Rostedt <rostedt@...dmis.org>
To:	wuzhangjin@...il.com
cc:	linux-mips@...ux-mips.org, linux-kernel@...r.kernel.org,
	Wu Zhangjin <wuzj@...ote.com>,
	Ralf Baechle <ralf@...ux-mips.org>,
	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Nicholas Mc Guire <der.herr@...r.at>
Subject: Re: [PATCH v2 2/6] mips dynamic function tracer support


On Fri, 29 May 2009, wuzhangjin@...il.com wrote:
> diff --git a/scripts/recordmcount.pl b/scripts/recordmcount.pl
> index 409596e..a5d2ace 100755
> --- a/scripts/recordmcount.pl
> +++ b/scripts/recordmcount.pl
> @@ -213,6 +213,17 @@ if ($arch eq "x86_64") {
>      if ($is_module eq "0") {
>          $cc .= " -mconstant-gp";
>      }
> +
> +} elsif ($arch eq "mips") {
> +	$mcount_regex = "^\\s*([0-9a-fA-F]+):.*\\s_mcount\$";
> +	$ld .= " -melf".$bits."btsmip";
> +
> +	$cc .= " -mno-abicalls -fno-pic ";
> +
> +    if ($bits == 64) {
> +		$type = ".dword";
> +    }
> +
>  } else {
>      die "Arch $arch is not supported with CONFIG_FTRACE_MCOUNT_RECORD";
>  }
> @@ -441,12 +452,12 @@ if ($#converts >= 0) {
>      #
>      # Step 5: set up each local function as a global
>      #
> -    `$objcopy $globallist $inputfile $globalobj`;
> +    `$objcopy $globallist $inputfile $globalobj 2>&1 >/dev/null`;
>  
>      #
>      # Step 6: Link the global version to our list.
>      #
> -    `$ld -r $globalobj $mcount_o -o $globalmix`;
> +    `$ld -r $globalobj $mcount_o -o $globalmix 2>&1 >/dev/null`;

We still need to find out why these are giving errors. I don't like the 
idea of hiding errors that might be useful. The better way is to change 
the code to avoid having any warnings or errors.

-- Steve


>  
>      #
>      # Step 7: Convert the local functions back into local symbols
> @@ -454,7 +465,7 @@ if ($#converts >= 0) {
>      `$objcopy $locallist $globalmix $inputfile`;
>  
>      # Remove the temp files
> -    `$rm $globalobj $globalmix`;
> +    `$rm $globalobj $globalmix 2>&1 >/dev/null`;
>  
>  } else {
>  
> -- 
> 1.6.0.4
> 
> 
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