linux-kernel - Re: [PATCH] Fix markup_oops.pl get error in x86

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Date:	Tue, 12 Jan 2010 11:02:22 +0800
From:	Hui Zhu <teawater@...il.com>
To:	Arjan van de Ven <arjan@...ux.intel.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Sam Ravnborg <sam@...nborg.org>,
	Ozan Çaglayan <ozan@...dus.org.tr>,
	Matthew Wilcox <willy@...ux.intel.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Fix markup_oops.pl get error in x86

Sorry I forgot the Signed-off-by and CC in prev mail.

When I try to use markup_oops.pl in x86, I always get:
cat 1 | perl markup_oops.pl ./vmlinux
objdump: --start-address: bad number: NaN
No matching code found
This is because in line:
       if ($line =~ /EIP is at ([a-zA-Z0-9\_]+)\+0x([0-9a-f]+)\/[a-f0-9]/) {
               $function = $1;
               $func_offset = $2;
       }
$func_offset will get a number like "0x2"
But in follow code:
my $decodestart = Math::BigInt->from_hex("0x$target") -
Math::BigInt->from_hex("0x$func_offset");
It add other 0x to 0x2.
Then this value will be set to NaN.
This patch will fix it.

Signed-off-by: Hui Zhu <teawater@...il.com>
CC: Andrew Morton <akpm@...ux-foundation.org>
CC: Arjan van de Ven <arjan@...ux.intel.com>
CC: Sam Ravnborg <sam@...nborg.org>
CC: Ozan Çaglayan <ozan@...dus.org.tr>
CC: Matthew Wilcox <willy@...ux.intel.com>

---
 scripts/markup_oops.pl |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/scripts/markup_oops.pl
+++ b/scripts/markup_oops.pl
@@ -154,7 +154,7 @@ while (<STDIN>) {
 	if ($line =~ /RIP: 0010:\[\<([a-z0-9]+)\>\]/) {
 		$target = $1;
 	}
-	if ($line =~ /EIP is at ([a-zA-Z0-9\_]+)\+(0x[0-9a-f]+)\/0x[a-f0-9]/) {
+	if ($line =~ /EIP is at ([a-zA-Z0-9\_]+)\+0x([0-9a-f]+)\/0x[a-f0-9]/) {
 		$function = $1;
 		$func_offset = $2;
 	}
--
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