From: Paul Brook <paul@codesourcery.com>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] qemu vs gcc4
Date: Mon, 23 Oct 2006 02:44:05 +0100 [thread overview]
Message-ID: <200610230244.06827.paul@codesourcery.com> (raw)
In-Reply-To: <200610222127.08346.rob@landley.net>
> Basically, gcc changed in a way that broke qemu. There's been an open bug
> report in gcc ever since, but the GCC developers really aren't interested
> in backwards compatability.
That's not entirely true. There are two problems:
- qemu makes assumptions about the layout of the code gcc generates. This
works by chance on older gcc. This effects all hosts, and is not a gcc bug.
- qemu reserves several registers for its own use. On architecturally crippled
hosts (ie. x86) this means we hit really obscure gcc bugs on x86 because gcc
runs out of registers. This is a gcc bug, but is also relatively easy to
workaround.
Paul
next prev parent reply other threads:[~2006-10-23 1:50 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-20 18:53 [Qemu-devel] qemu vs gcc4 K. Richard Pixley
2006-10-22 22:06 ` Johannes Schindelin
2006-10-23 8:16 ` Martin Guy
2006-10-23 12:20 ` Paul Brook
2006-10-23 13:59 ` Avi Kivity
2006-10-23 14:10 ` Paul Brook
2006-10-23 14:28 ` Avi Kivity
2006-10-23 14:31 ` Paul Brook
2006-10-23 14:35 ` Avi Kivity
2006-10-23 17:41 ` K. Richard Pixley
2006-10-23 17:58 ` Paul Brook
2006-10-23 18:04 ` K. Richard Pixley
2006-10-23 18:20 ` Laurent Desnogues
2006-10-23 18:37 ` Paul Brook
2006-10-24 23:39 ` Rob Landley
2006-10-25 0:24 ` Paul Brook
2006-10-25 19:39 ` Rob Landley
2006-10-26 18:09 ` Daniel Jacobowitz
2006-10-31 16:53 ` Rob Landley
2006-10-31 19:02 ` Paul Brook
2006-10-31 20:41 ` Rob Landley
2006-10-31 22:08 ` Paul Brook
2006-10-31 22:31 ` Laurent Desnogues
2006-10-31 23:00 ` Paul Brook
2006-11-01 0:00 ` Rob Landley
2006-11-01 0:29 ` Paul Brook
2006-11-01 1:51 ` Rob Landley
2006-11-01 3:22 ` Paul Brook
2006-11-01 16:34 ` Rob Landley
2006-11-01 17:01 ` Paul Brook
2006-10-31 23:17 ` Rob Landley
2006-11-01 0:01 ` Paul Brook
2006-10-30 4:35 ` Rob Landley
2006-10-30 14:56 ` Paul Brook
2006-10-30 16:31 ` Rob Landley
2006-10-30 16:50 ` Paul Brook
2006-10-30 22:54 ` Stephen Torri
2006-10-30 23:13 ` Paul Brook
2006-10-23 1:27 ` Rob Landley
2006-10-23 1:44 ` Paul Brook [this message]
2006-10-23 1:45 ` Johannes Schindelin
2006-10-23 17:53 ` K. Richard Pixley
2006-10-23 18:08 ` Rob Landley
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