From: Jeff Dike <jdike@addtoit.com>
To: Blaisorblade <blaisorblade@yahoo.it>
Cc: user-mode-linux-devel@lists.sourceforge.net
Subject: Re: [uml-devel] UML/64bit is miscompiled by gcc 4.0.3 on Ubuntu 6.06 LTS
Date: Mon, 22 Jan 2007 15:59:45 -0500 [thread overview]
Message-ID: <20070122205945.GB5203@ccure.user-mode-linux.org> (raw)
In-Reply-To: <200701200018.30165.blaisorblade@yahoo.it>
On Sat, Jan 20, 2007 at 12:18:30AM +0100, Blaisorblade wrote:
> Ok, I hope I remembered correctly how to debug such faults (I'm posting the
> full procedure so you can give a look)
Correct.
> 0x00000000619a592f: mov %edx,%fs:(%rcx) #faulting instruction.
This and the registers involved are usually all you need.
> RCX there is (long)regs->skas.regs[11] = -64, and for FS, since HOST_FS = 25,
> I get:
>
> print/x regs->skas.regs[25]
> $45 = 0x63
The presence of %fs in the instruction immediately suggests a TLS problem.
Also, the trap number in cases like this should be 13, rather than the
14 you get with a normal page fault.
%fs isn't 0, so that's one thing that's not wrong. What's in the
corresponding segment?
--
Work email - jdike at linux dot intel dot com
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next prev parent reply other threads:[~2007-01-22 21:06 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-17 16:15 [uml-devel] UML/64bit is miscompiled by gcc 4.0.3 on Ubuntu 6.06 LTS Blaisorblade
2007-01-17 18:17 ` Christopher S. Aker
2007-01-17 18:15 ` Antoine Martin
2007-01-17 19:50 ` Antoine Martin
2007-01-19 11:00 ` [uml-devel] buggy UML AMD64? Antoine Martin
2007-01-19 16:07 ` Daniel Gryniewicz
2007-01-19 16:14 ` Antoine Martin
2007-01-19 16:38 ` Daniel Gryniewicz
2007-01-19 16:42 ` Antoine Martin
2007-01-19 17:33 ` Antoine Martin
2007-01-19 19:56 ` Antoine Martin
2007-01-21 9:17 ` Boaz Harrosh
2007-01-21 13:04 ` Antoine Martin
2007-01-23 15:20 ` Boaz Harrosh
2007-01-21 14:38 ` Joel Palmius
2007-01-21 14:46 ` Antoine Martin
2007-01-21 14:55 ` Joel Palmius
2007-01-21 16:11 ` Joel Palmius
2007-01-22 22:09 ` Jeff Dike
2007-01-23 0:59 ` Antoine Martin
2007-01-19 16:38 ` Antoine Martin
2007-02-15 3:43 ` [uml-devel] UML/64bit is miscompiled by gcc 4.0.3 on Ubuntu 6.06 LTS Blaisorblade
2007-01-19 23:31 ` Blaisorblade
2007-01-17 23:26 ` Jeff Dike
2007-01-19 23:18 ` Blaisorblade
2007-01-22 20:59 ` Jeff Dike [this message]
2007-01-23 8:09 ` Blaisorblade
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