gdb/2171: No backtrace generated on amd64

Joe Hansche
Sun Sep 17 23:08:00 GMT 2006

The following reply was made to PR gdb/2171; it has been noted by GNATS.

From: "Joe Hansche" <>
To: "Daniel Jacobowitz" <>
Subject: Re: gdb/2171: No backtrace generated on amd64
Date: Sun, 17 Sep 2006 17:04:13 -0600

 > Sorry, I wasn't clear enough - neither these nor your later
 > off-list message are the right entries.  The first column is a physical
 > file offset, and is not particularly interesting.  The intersting bit
 > is the second column: virtual address, e.g. 0x0000000000635070.  Is
 > that covered by any LOAD?
 The first LOAD entry has a VirtAddr value of 0x00002aaaaaaab000, and
 the values continue to increase until 0x00007fffff7fa000.  So, all of
 the values from the coredump are far above the value from the PHP
 binary: 0x0000000000635070.  I'm sorry I don't quite know what that
 means in my case.  Would it be more likely that it's a problem with my
 PHP, gdb, or kernel?  Any suggestions I should try? I can attach my
 kernel config if it will be helpful?
 > It'd be a kernel version, but I don't remember which.  I think 2.6.15
 > is far too new to have the problem, but I don't remember for sure.
 > --
 > Daniel Jacobowitz
 > CodeSourcery

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