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From: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>,
	Paul Mackerras <paulus@samba.org>,
	Frederic Weisbecker <fweisbec@gmail.com>,
	Steven Rostedt <rostedt@goodmis.org>,
	Arnaldo Carvalho de Melo <acme@redhat.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	LKML <linux-kernel@vger.kernel.org>
Subject: BUG: different symbol address between System.map and /proc/kallsyms
Date: Mon, 21 Dec 2009 09:20:07 +0800	[thread overview]
Message-ID: <4B2ECD47.7040202@cn.fujitsu.com> (raw)

Hi,

The symbol address in System.map and /proc/kallsys is different:

# cat System.map | grep _text
  c1000000 T _text
# cat /proc/kallsyms | grep _text
  c0100000 T _text

# readelf -s vmlinux | grep _text
35078: c1000000     0 NOTYPE  GLOBAL DEFAULT    1 _text

So, perf can't get sysmbol address properly:

# ./perf report
# Samples: 29
#
# Overhead  Command        Shared Object  Symbol
# ........  .......  ...................  ......
#
    93.10%    sleep             c014f988  [k] 0x000000c014f988
     3.45%    sleep  libc-2.9.90.so       [.] _int_malloc
     3.45%    sleep  [kernel]             [k] 0x000000c014f988

             reply	other threads:[~2009-12-21  1:22 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-12-21  1:20 Xiao Guangrong [this message]
2009-12-21  1:23 ` BUG: different symbol address between System.map and /proc/kallsyms Xiao Guangrong
2009-12-21  6:31 ` H. Peter Anvin
2009-12-21  9:13   ` Xiao Guangrong
2009-12-21  9:34     ` Ingo Molnar

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