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Re: machine types for MIPS in ELF file

To: Ralf Baechle <ralf@oss.sgi.com>, macro@ds2.pg.gda.pl
Subject: Re: machine types for MIPS in ELF file
From: Jun Sun <jsun@mvista.com>
Date: Tue, 08 May 2001 14:20:06 -0700
Cc: linux-mips@oss.sgi.com
References: <3AF843F7.72BC47F0@mvista.com> <20010508164846.A1471@bacchus.dhis.org>
Sender: owner-linux-mips@oss.sgi.com
Ralf Baechle wrote:
> 
> On Tue, May 08, 2001 at 12:07:35PM -0700, Jun Sun wrote:
> 
> > The e_machine field in ELF file standard defines two values for MIPS:
> >
> > 8     - MIPS RS3000 BE
> > 10    - MIPS RS4000 BE
> >
> > Naturally the question is: what about LE binaries?  And what about other
> > CPUs?  Is there any effort to clean up this thing?
> >
> > All the tools that I know of are using 8, pretty much for all CPUs and both
> > endians.  No real harm has been observed, but it causes some anonying 
> > "invalid
> > byte order" complains if you do "file" on a MIPS LE binary.  Of course, it
> > will also invariably reports "R3000" cpu as well.
> 
> EM_MIPS_RS4_BE was apparently only in use for a short time; EM_MIPS is
> being used for both byte order.  The byteorder is nowadays identified by
> EI_DATA.
> 

That makes a lot of sense.

BTW, where is the latest ELF spec that says so?  Maciej, which spec are you
referring to?

Jun

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