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