| /* | |
| * 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"); | |
| } |