null pointers

null pointers

Posted Mar 28, 2008 22:33 UTC (Fri) by anton (subscriber, #25547)
In reply to: null pointers by nix
Parent article: Who maintains dpkg?

On [PPC64 and IA64] it so happens that data pointers are all the same size: but function pointers are larger.

Not on Linux-PPC64 (and probably not on Linux-IA64, either):

#include <stdio.h>
int main()
{
  printf("%ld %ld\n", sizeof(void *), sizeof(int(*)()));
  return 0;
}

prints

8 8

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Oh. My memory is failing me and I can't read simulator source code, it 
seems. (I was *sure* they were examples of arches using a descriptor 
consisting of a data pointer combined with other stuff.)