Re: PAGE_SIZE and native vs. emulated 32-bit SPARC ABI

[William Lee Irwin III <wli@holomorphy.com>]

On Thursday 30 December 2004 11:07 am, William Lee Irwin III wrote:
>> It seems that most/all 32-bit SPARC programs are written and compiled
>> for emulated 32-bit on sun4u, which has an 8KB PAGE_SIZE, and returns
>> 8KB for getpagesize(). This is unfortunately causing spectacular
>> failures

On Thu, Dec 30, 2004 at 11:50:28AM +0000, C.Newport wrote:
> This sounds like a bug to me. 
> A 32 bit program should see the same kernel environment on 32 and 64 bit
> machines. There may be a case for saying that the compiler should also
> be aware of such issues when building a 32 bit model.
> Also see the kernel config stuff - the page size for ramdisks defaults to 
> 4096.

IMHO this is ABI emulation QOI. I personally just use the things for
ABI torture tests, and affected programs are somewhat uncommon. I think
dealing with this would involve personality handling in sparc32, since
it by and large is stuck bearing the burden of being compatible with
common usage on more modern 32-bit environments and not vice-versa,
which may very well be impossible.


-- wli