Description of problem:

When a 32bit application running on a ia64 system makes a shmctl call 
with IPC_STAT flag junk data will be filled in the shmid_ds 
structure.

Version-Release number of selected component (if applicable):
Kernel version - 2.4.18-e.12sm

How reproducible:

Build the sample program given below on a 32bit machine and run it on 
a 64bit machine.
#include <stdio.h>
#include <errno.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/types.h>

#define errmsg(s,no) { printf("*** %s - %s ***\n",s,strerror(no)); 
exit(1); }
#define FTOK_FILENAME "/sbin"
#define PRJ_NO 419
int main()
{
        key_t shmkey;
        int shmid;
        char *shmt=NULL;
        struct shmid_ds shdata;


        if ((shmkey = ftok(FTOK_FILENAME,PRJ_NO)) == -1)
                errmsg("ftok error",errno);

        if ((shmid = shmget(shmkey,1048700,IPC_CREAT|IPC_EXCL|0666)) 
== -1)
                errmsg("shmget error",errno);

        if((shmt=(char*)shmat(shmid,NULL,0)) == -1)
                errmsg("shmat error", errno);

        if(shmctl(shmid,IPC_STAT,&shdata) == 0)
        {
                printf("=Shared mem size==%d==\n",shdata.shm_segsz);
        }

        shmdt(shmt);
        shmctl(shmid,IPC_RMID,0);
}


Steps to Reproduce:
1.Build the above program on a 32bit machine
2.Run it on a ia64 machine with 2.1AS
  
Actual results:

=Shared mem size==1073832704==

Expected results:

=Shared mem size==1048700==

Additional info: