On Sat, 13 Dec 2008 02:06:37 +0000
Steve Cotton <steve0...@s.cotton.clara.co.uk> wrote:
> Both games actually play OK on 64-bit AMD.
This is due to a weird behaviour of glibc or perhaps the kernel. If you
malloc a small amount of memory, you get a pointer that fits in a
32-bit int. If you allocate a large amount of memory, you don't.
For example:
#include <stdlib.h>
#include <stdio.h>
int main ()
{
printf("small allocation: %p\n", malloc(1));
printf("large allocation: %p\n", malloc(1000000));
}
consistently gives output like this on my system:
$ ./malloc
small allocation: 0x1a14010
large allocation: 0x7f0be5ded010
I don't think this is something one should be relying on :)
--
Peter De Wachter
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