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| /*
| * Copyright 2016, Michael Ellerman, IBM Corp.
| * Licensed under GPLv2.
| */
|
| #include <stdio.h>
| #include <stdlib.h>
| #include <string.h>
| #include <sys/mman.h>
|
| #include <asm/cputable.h>
|
| #include "utils.h"
|
| #define SIZE (64 * 1024)
|
| int test_prot_sao(void)
| {
| char *p;
|
| /* 2.06 or later should support SAO */
| SKIP_IF(!have_hwcap(PPC_FEATURE_ARCH_2_06));
|
| /*
| * Ensure we can ask for PROT_SAO.
| * We can't really verify that it does the right thing, but at least we
| * confirm the kernel will accept it.
| */
| p = mmap(NULL, SIZE, PROT_READ | PROT_WRITE | PROT_SAO,
| MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
| FAIL_IF(p == MAP_FAILED);
|
| /* Write to the mapping, to at least cause a fault */
| memset(p, 0xaa, SIZE);
|
| return 0;
| }
|
| int main(void)
| {
| return test_harness(test_prot_sao, "prot-sao");
| }
|
|
