Re: breakage: flex mmap patch for x86-64

["Rafael J. Wysocki" <rjw@sisk.pl>]

On Friday 05 of November 2004 23:54, Ricky Beam wrote:
> On Fri, 5 Nov 2004, Rafael J. Wysocki wrote:
> >> This prevents 32bit apps from running on x86_64.  Backing out the 
Makefile
> >> and processor.h changes has everything working again.  Perhaps something
> >> needs to check for a 32bit environment?  I don't know if it's the change
> >> to TASK_SIZE or the "backwards" mmaps that's the real breakage.  And at 
this
> >> point, I don't have time to test.
> >>
> >> (64bit apps work just fine.)
> >
> >Confirmed, and apparently it is not sifficient to change the TASK_SIZE
> >definition in include/asm-x86_64/processor.h to make the 32-bit userland
> >work.  Hence, it seems that the "backwards" mmaps break things.
> 
> Looks like checking for PER_LINUX32 might fix it...
> 
> >>>      if (current->personality & (ADDR_COMPAT_LAYOUT|PER_LINUX32))

It does not seem to work either.

Greets,
RJW

-- 
- Would you tell me, please, which way I ought to go from here?
- That depends a good deal on where you want to get to.
		-- Lewis Carroll "Alice's Adventures in Wonderland"