linux-kernel - Re: RFD: x32 ABI system call numbers

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Message-ID: <20110830011719.GB8505@thunk.org>
Date:	Mon, 29 Aug 2011 21:17:19 -0400
From:	Ted Ts'o <tytso@....edu>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"H.J. Lu" <hjl.tools@...il.com>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: RFD: x32 ABI system call numbers

On Mon, Aug 29, 2011 at 09:01:37PM +0200, Geert Uytterhoeven wrote:
> On Sat, Aug 27, 2011 at 03:42, Linus Torvalds
> <torvalds@...ux-foundation.org> wrote:
> > time_t really *should* be 64-bit, the same way "off_t" should be. If
> > it's not, there's something wrong.
> 
> Which will break all this non-portable 32-bit-only source code x32 was invented
> for in the first place?
> Someone will pass a time_t or off_t and an innocent pointer to a custom
> printf-alike function to format it like "%u %s" and it will go bang...

Well, for old static binaries, the old syscall ABI would still have to
use 32-bit off_t's and time_t's.  And for dynamically linked binaries,
glibc could deal with the compatibility issues with the old ABI,
across the shared library interface, right?

      	    	      	  		       	    - Ted
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