linux-kernel - Re: Kernel Bug in 2.4.35 when compiled gcc>=4.2.0 and -march=c3

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Message-ID: <46B761EC.2050803@zytor.com>
Date:	Mon, 06 Aug 2007 11:01:16 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Willy Tarreau <w@....eu>
CC:	Segher Boessenkool <segher@...nel.crashing.org>,
	Axel Reinhold <axel@...akout.de>, linux-kernel@...r.kernel.org
Subject: Re: Kernel Bug in 2.4.35 when compiled gcc>=4.2.0 and -march=c3

Willy Tarreau wrote:
> 
> I'm well aware of that, even in the example I wrote to reproduce the issue
> and posted to gcc's bugzilla, I clearly have one function prototype and a
> separate asm statement which contained a label with the function's name.
> 
> So in my opinion, the code above is not buggy. It's dirty (though I did
> not find how to produce the equivalent in a different manner).
> 

Well, top-level assembly is usually nasty.  Setting the section in the
assembly statement as you said is probably the only thing you *can* do.

I don't think there is any requirement that top-level assembly
statements get the section set to .text on their behalf.

	-hpa
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