Bug 1978412

Description of problem:
glibc doesn't add IPC_64 flag to SHM_STAT_ANY shmctl calls, which leads to incorrect results on ppc64/ppc64le.

Version-Release number of selected component (if applicable):
glibc-2.17-317.el7.ppc64, glibc-2.17-324.el7.ppc64
glibc-2.17-317.el7.ppc64le

How reproducible:
Easily and consistently, after some initial effort

Steps to Reproduce:
Reproducer:
---8<---
#include <assert.h>
#include <errno.h>
#include <stdio.h>

#include <sys/ipc.h>
#include <sys/shm.h>

int main()
{
	struct shmid_ds ds;
	struct shmid_ds ds_any;
	int id;
	
	id = shmget(IPC_PRIVATE, 4096, IPC_CREAT | 0600);
	if (id < 0) {
		perror("shmget");
		return 2;
	}

	if (shmctl(id, SHM_STAT, &ds) < 0) {
		perror("shmctl(SHM_STAT)");
		return 3;
	}

	printf("SHM_STAT shm_cpid:  %#x\n", ds.shm_cpid);
	printf("SHM_STAT shm_atime: %#llx\n", (unsigned long long) ds.shm_atime);
	printf("SHM_STAT shm_dtime: %#llx\n", (unsigned long long) ds.shm_dtime);
	printf("SHM_STAT shm_ctime: %#llx\n", (unsigned long long) ds.shm_ctime);
	printf("\n");

	if (shmctl(id, SHM_STAT_ANY|0x100, &ds_any) < 0) {
		perror("shmctl(SHM_STAT_ANY)");
		return 4;
	}

	printf("SHM_STAT_ANY|IPC_64 shm_cpid:  %#x\n", ds_any.shm_cpid);
	printf("SHM_STAT_ANY|IPC_64 shm_atime: %#llx\n", (unsigned long long) ds_any.shm_atime);
	printf("SHM_STAT_ANY|IPC_64 shm_dtime: %#llx\n", (unsigned long long) ds_any.shm_dtime);
	printf("SHM_STAT_ANY|IPC_64 shm_ctime: %#llx\n", (unsigned long long) ds_any.shm_ctime);
	printf("\n");

	if (shmctl(id, SHM_STAT_ANY, &ds_any) < 0) {
		perror("shmctl(SHM_STAT_ANY)");
		return 4;
	}

	printf("SHM_STAT_ANY shm_cpid:  %#x\n", ds_any.shm_cpid);
	printf("SHM_STAT_ANY shm_atime: %#llx\n", (unsigned long long) ds_any.shm_atime);
	printf("SHM_STAT_ANY shm_dtime: %#llx\n", (unsigned long long) ds_any.shm_dtime);
	printf("SHM_STAT_ANY shm_ctime: %#llx\n", (unsigned long long) ds_any.shm_ctime);
	printf("\n");

	assert(ds.shm_cpid == ds_any.shm_cpid);
	assert(ds.shm_atime == ds_any.shm_atime);
	assert(ds.shm_ctime == ds_any.shm_ctime);
	assert(ds.shm_dtime == ds_any.shm_dtime);

	if (shmctl(id, IPC_RMID, NULL) < 0)
		perror("shmctl(IPC_RMID)");

	return 0;
}
--->8---
Compile:
gcc -D_GNU_SOURCE=1 -std=c99 -Wall -Wextra -Werror ipc_repro.c -o ipc_repro
Run:
./ipc_repro

Actual results:
Reproducer exits with exit code 0.

Expected results:
Reproducer aborts on the first assertion:
---8<---
ipc_repro: ipc_repro.c:53: main: Assertion `ds.shm_cpid == ds_any.shm_cpid' failed.
Aborted
--->8---

Additional info:
Discovered by strace test suite, ipc_shm test.
The same issue might occur with MSG_STAT_ANY and SEM_STAT_ANY.