Re: RFC: Add 32bit x86-64 support to binutils

[Jakub Jelinek <jakub at redhat dot com>]

On Thu, Dec 30, 2010 at 08:53:32PM +0100, Richard Guenther wrote:
> > Syscalls sometimes need three different versions in the kernel; sometimes
> > the wrong version gets put in the n32 syscall table. ?Special syscall
> > wrappers are often needed in glibc; although for most purposes the glibc
> > port is a 32-bit one, including having separate functions for 32-bit and
> > 64-bit off_t, syscalls tend to need to be called in the 64-bit way (long
> > long values as single arguments, in particular).
> 
> Would be nice if LFS would be mandatory on the new ABI, thus
> off_t being 64bits.

And avoid ambiguous cases that x86-64 ABI has, e.g. whether
caller or callee is responsible for sign/zero extension of arguments, to
avoid the need to sign/zero extend twice, etc.

	Jakub