On Mon, Aug 21, 2006 at 03:01:29PM +0000, Kailash Sethuraman wrote:
> On 8/20/06, Jason Thorpe <thorpej@shagadelic.org> wrote:
> >
> >NetBSD's mmap should be fixed.  We should probably version the symbol
> >so old programs continue to run, but new programs get the new behavior.
> >
> 
> >From my code reading, please correct me if I am wrong,
> It does seem to be the case that when a mmap with length 0 is
> specified,size passed to uvm_mmap() can be 0.
[...]
> Does this warrant a PR for ld.elf_so, and possibly other programs in
> base that do 0 length mmaps?
> 
> Or must valgrind be  taught to accomodate this case in netbsd?

I will note that we do not claim anywhere to slavishly conform to SUS (of
any version); rather, we say we will conform to _reasonable_ standards.

The interface in question (mmap(2)) is a BSD interface, to which SUS seems
to have made a largely arbitrary change.  Whether we change it to match SUS
or not, valgrind should probably be fixed to understand the traditional
behavior.

-- 
  Thor Lancelot Simon	                                     tls@rek.tjls.com

  "We cannot usually in social life pursue a single value or a single moral
   aim, untroubled by the need to compromise with others."      - H.L.A. Hart