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Re: Adding MIPS support to GOLD

From: Daniel Jacobowitz <drow at false dot org>
To: Ian Lance Taylor <iant at google dot com>
Cc: Rick Mann <rmann at latencyzero dot com>, David Daney <ddaney at avtrex dot com>, Binutils <binutils at sourceware dot org>
Date: Tue, 25 Mar 2008 14:31:15 -0400
Subject: Re: Adding MIPS support to GOLD
References: <E3BB9705-87B9-4E9C-B234-52D23319A440@latencyzero.com> <47E934CE.7010508@avtrex.com> <98C745B7-D09C-4BB6-BF35-AB73707C553E@latencyzero.com> <m3fxueacj0.fsf@google.com>

On Tue, Mar 25, 2008 at 11:23:15AM -0700, Ian Lance Taylor wrote:
> For details you have to read the MIPS ELF ABI, which you can find in
> PDF form off of http://sco.com/developers/devspecs/ .
> 
> MIPS uses multi-GOT because it only permits 16 bit offsets from a base
> register.  That means that if you need a GOT larger than 65536 bytes,
> as is true of large programs with lots of global variables, you need
> to use more than one GOT.  i386 permits 32 bit offsets from a base
> register, so a single GOT is always enough.

MIPS's GOT (and multi-GOT) are particularly ornery as
platform-specific magic go - mostly due to IRIX compatibility.

-- 
Daniel Jacobowitz
CodeSourcery

References:
- Adding MIPS support to GOLD
  - From: Rick Mann
- Re: Adding MIPS support to GOLD
  - From: David Daney
- Re: Adding MIPS support to GOLD
  - From: Rick Mann
- Re: Adding MIPS support to GOLD
  - From: Ian Lance Taylor

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