short pointers (32 bit) in 64 bit apps

[Nicholas Sherlock]

On 19/05/2010 3:58 p.m., Reza Roboubi wrote:
> Do you know what it takes to do it? How much work for a newcomer to get
> up to speed with gcc? (Maybe this should go to the developer list?)

You would need to write a memory allocator which divides the address 
space into 4GB (32-bit pages). Then you could create a new malloc 
routine which has an extra argument to allow you to allocate memory from 
within a specified 4GB page. That way you can make all of your 
allocations for a given data structure lie within the same region.

Then you can add the top 32-bits to pointer addresses within your data 
structure before you attempt to dereference them.

Cheers,
Nicholas Sherlock