Description of problem:
x86-64 xen kernels (I haven't checked non-xen kernels, I guess they have the
same problem) are missing the [vdso] annotation in /proc/self/maps.  It should
be present to match what native x86 kernels do.


Version-Release number of selected component (if applicable):
2.6.18-1.2798.fc6

How reproducible:
always

Steps to Reproduce:
1.compile as 32-bit binary:

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
int main(void)
{
  char buf[100];
  sprintf(buf, "cat /proc/%d/maps", getpid());
  system(buf);
  return 0;
}

2.run
3.
  
Actual results:
[...]
ffffe000-fffff000 r-xp ffffe000 00:00 0 

Expected results:

[...]
ffffe000-fffff000 r-xp ffffe000 00:00 0        [vdso]

Additional info: