From: "Jim C. Brown" <jbrown106@phreaker.net>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] get_func() hangs with gcc 3.4.2 on MinGW and WinXP host
Date: Sun, 19 Dec 2004 17:57:43 -0500 [thread overview]
Message-ID: <20041219225743.GA18362@jbrown.mylinuxbox.org> (raw)
In-Reply-To: <Pine.LNX.4.58.0412191524380.3165@wgmdd8.biozentrum.uni-wuerzburg.de>
On Sun, Dec 19, 2004 at 03:25:26PM +0100, Johannes Schindelin wrote:
> Hi,
>
> On Sat, 18 Dec 2004, Jim C. Brown wrote:
>
> > Originally, the op_* functions for qemu were written so that they would
> > have the machine code and then the rets at the very end of the function.
> > qemu could then just chain them together by stripping the rets.
> >
> > gcc now rearranges the generated code around, and reserves the right to
> > stick in extra rets any place it wants, not just the very end, which
> > makes them very hard to strip off.
>
> IIRC there was a flag to gcc to prevent just this.
>
> Ciao,
> Dscho
>
AFAIK, there was no such flag. Apparently, you can't have such a flag, due to
the redesign of the gcc optimizer.
Of course, that was said to me a while ago ... it may be that someone manged to
nag the gcc team enough to get them to add this flag just for us. If that is so,
we just need to add that flag to the makefiles.
--
Infinite complexity begets infinite beauty.
Infinite precision begets infinite perfection.
next prev parent reply other threads:[~2004-12-19 23:08 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-12-15 13:47 [Qemu-devel] get_func() hangs with gcc 3.4.2 on MinGW and WinXP host tomba
2004-12-15 14:18 ` Johannes Schindelin
2004-12-15 14:59 ` tomba
2004-12-15 23:45 ` Jim C. Brown
2004-12-15 23:52 ` Johannes Schindelin
2004-12-17 18:56 ` Juergen Lock
2004-12-18 0:09 ` Johannes Schindelin
2004-12-18 4:04 ` Jim C. Brown
2004-12-18 14:59 ` Johannes Schindelin
2004-12-18 15:50 ` Jim C. Brown
2004-12-19 14:25 ` Johannes Schindelin
2004-12-19 22:57 ` Jim C. Brown [this message]
2004-12-18 21:07 ` John R. Hogerhuis
2004-12-18 21:59 ` Jim C. Brown
2004-12-19 14:45 ` Johannes Schindelin
2004-12-20 6:26 ` John R. Hogerhuis
2004-12-20 15:16 ` Removing GCC dependency, was " Johannes Schindelin
2004-12-20 18:02 ` John R. Hogerhuis
2004-12-20 23:30 ` Fabrice Bellard
2004-12-21 14:36 ` [Qemu-devel] Testing with Win2k SP3 and Win2kSP4 Elefterios Stamatogiannakis
2004-12-21 15:23 ` [Qemu-devel] Re: Removing GCC dependency Paul Brook
2004-12-21 15:36 ` Herbert Poetzl
2004-12-19 22:13 ` [Qemu-devel] get_func() hangs with gcc 3.4.2 on MinGW and WinXP host Fabrice Bellard
2004-12-19 22:29 ` Johannes Schindelin
2004-12-20 3:31 ` Rob Browning
2004-12-20 18:57 ` John R. Hogerhuis
2005-01-17 14:16 ` CMinusMins, was " Johannes Schindelin
2005-01-17 15:36 ` malc
2005-01-17 15:53 ` Jim C. Brown
2005-01-17 16:13 ` OCAML, was " Mark A. Williamson
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