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Re: RFC: A new MIPS64 ABI
- From: Richard Sandiford <rdsandiford at googlemail dot com>
- To: David Daney <ddaney at caviumnetworks dot com>
- Cc: linux-mips <linux-mips at linux-mips dot org>, GCC <gcc at gcc dot gnu dot org>, binutils <binutils at sourceware dot org>, Prasun Kapoor <prasun dot kapoor at caviumnetworks dot com>
- Date: Mon, 21 Feb 2011 19:45:41 +0000
- Subject: Re: RFC: A new MIPS64 ABI
- References: <4D5990A4.2050308__41923.1521235362$1297715435$gmane$org@caviumnetworks.com>
David Daney <ddaney@caviumnetworks.com> writes:
> Background:
>
> Current MIPS 32-bit ABIs (both o32 and n32) are restricted to 2GB of
> user virtual memory space. This is due the way MIPS32 memory space is
> segmented. Only the range from 0..2^31-1 is available. Pointer
> values are always sign extended.
>
> Because there are not already enough MIPS ABIs, I present the ...
>
> Proposal: A new ABI to support 4GB of address space with 32-bit
> pointers.
FWIW, I'd be happy to see this go into GCC.
Richard