Re: X32 psABI status

[H.J. Lu]

On Sun, Feb 13, 2011 at 2:57 PM, Arnd Bergmann <arnd@xxxxxxxx> wrote:
>
>> The cost of an entire different ABI layer (supporting a new memory layout)
>> would be enormous, a.k.a. "not worth it", which is why the memory layout
>> of kernel objects needs to be compatible with i386.
>
> Right, this makes sense, you certainly can't redefine all the data
> structures.
>
> What would probably be a good idea is to compare the set of syscalls
> in X32 and asm-generic, and to either eliminate or document the
> differences. You can probably even take the asm-generic syscall numbers,
> even if you keep the i386 data structures.
>

x32 system call number is BASE + 64bit system call number.  It is
easy to keep 64bit and x32 in sync.

-- 
H.J.
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