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Re: Why does mips define elf_backend_sign_extend_vma to true?
- To: binutils at sourceware dot cygnus dot com
- Subject: Re: Why does mips define elf_backend_sign_extend_vma to true?
- From: "H . J . Lu" <hjl at lucon dot org>
- Date: Tue, 7 Aug 2001 18:39:33 -0700
- Cc: rth at redhat dot com, ac131313 at redhat dot com
- References: <20010807182459.A15252@lucon.org>
On Tue, Aug 07, 2001 at 06:24:59PM -0700, H . J . Lu wrote:
> Only elf32-mips.c has
>
> #define elf_backend_sign_extend_vma true
>
> and we get
>
> # nm vmlinux
> ffffffff802e01f0 D C_A_D
> ffffffff802df344 D EISA_bus
> ....
>
> Does anyone know why mips does this?
>
It seems that it was done on purpose:
http://sources.redhat.com/ml/binutils/1999-11/msg00080.html
I don't believe it is correct for the normal 32bit MIPS SVR4 ABI. I'd like
to turn it off. If you want to do sign extension, you should create a new
ABI, not break the existing ABI.
H.J.