From: Paul Brook <paul@codesourcery.com>
To: qemu-devel@nongnu.org
Cc: Jan Kiszka <jan.kiszka@siemens.com>,
Anthony Liguori <aliguori@us.ibm.com>
Subject: Re: [Qemu-devel] Re: [PATCH 4/4] gdbstub: x86: Switch 64/32 bit registers dynamically
Date: Mon, 29 Jun 2009 15:07:04 +0100 [thread overview]
Message-ID: <200906291507.05278.paul@codesourcery.com> (raw)
In-Reply-To: <4A48C4DF.20407@siemens.com>
> >> No question, this is a gdb issue. But, as it was confirmed in several
> >> discusssions with gdb people, it is a non-trivial thing to fix. So until
> >> qemu finds a gdb version attach with a rework x86 support, we have to
> >> work around it by switching the register layout as the guest switches
> >> its execution mode between 16/32 and 64 bit.
> >
> > I still object to this patch. Especially as there's no indication that
> > it's a harroble hack to workaround broken GDB.
>
> Sorry, last sentence doesn't parse for me.
You've just deliberately broken the qemu gdbstub. After your patch it is
impossible to debug mixed 32/64-bit code.
> So what do you suggest for fixing this bug?
Fix gdb.
> Do you have a patch at hand to fix gdb before 7.0?
No. I'm unconvinced by any argument that requires a specific GDB version.
You've known about this bug for a long time now.
> And a solution for older gdbs?
If you really care about old gdb, then you get to backport the changes.
Paul
next prev parent reply other threads:[~2009-06-29 14:07 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-27 7:53 [Qemu-devel] [RESEND][PATCH 0/4] Long pending gdbstub patches Jan Kiszka
2009-06-27 7:53 ` [Qemu-devel] [PATCH 4/4] gdbstub: x86: Switch 64/32 bit registers dynamically Jan Kiszka
2009-06-29 13:01 ` [Qemu-devel] " Paul Brook
2009-06-29 13:42 ` Jan Kiszka
2009-06-29 14:07 ` Paul Brook [this message]
2009-06-29 14:22 ` Jan Kiszka
2009-06-29 14:43 ` Paul Brook
2009-06-29 14:53 ` Jan Kiszka
2009-06-29 15:16 ` Daniel Jacobowitz
2009-06-29 15:36 ` Jan Kiszka
2009-06-29 22:00 ` Jamie Lokier
2009-06-30 11:54 ` Jan Kiszka
2009-06-30 7:15 ` Gerd Hoffmann
2009-06-30 12:00 ` Jan Kiszka
2009-06-29 14:51 ` Paul Brook
2009-06-27 7:53 ` [Qemu-devel] [PATCH 1/4] gdbstub: Add vCont support Jan Kiszka
2009-06-27 7:53 ` [Qemu-devel] [PATCH 2/4] gdbstub: x86: Refactor register access Jan Kiszka
2009-06-27 7:53 ` [Qemu-devel] [PATCH 3/4] gdbstub: x86: Support for setting segment registers Jan Kiszka
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