100 lines
2.1 KiB
C
100 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright (c) National ICT Australia, 2006
|
|
* Author: carl.vanschaik at nicta.com.au
|
|
*/
|
|
|
|
/*\
|
|
* [Description]
|
|
*
|
|
* If the kernel fails to correctly flush the TLB entry, the second mmap
|
|
* will not show the correct data.
|
|
*
|
|
* [Algorithm]
|
|
* - create two files, write known data to the files
|
|
* - mmap the files, verify data
|
|
* - unmap files
|
|
* - remmap files, swap virtual addresses
|
|
* - check wheather if the memory content is correct
|
|
*/
|
|
|
|
#include <string.h>
|
|
#include "tst_test.h"
|
|
|
|
#define LEN 64
|
|
|
|
static int f1 = -1, f2 = -1;
|
|
static char *mm1 = NULL, *mm2 = NULL;
|
|
|
|
static const char tmp1[] = "testfile1";
|
|
static const char tmp2[] = "testfile2";
|
|
|
|
static const char str1[] = "testing 123";
|
|
static const char str2[] = "my test mem";
|
|
|
|
static void run(void)
|
|
{
|
|
|
|
char *save_mm1, *save_mm2;
|
|
|
|
mm1 = SAFE_MMAP(0, LEN, PROT_READ, MAP_PRIVATE, f1, 0);
|
|
mm2 = SAFE_MMAP(0, LEN, PROT_READ, MAP_PRIVATE, f2, 0);
|
|
|
|
save_mm1 = mm1;
|
|
save_mm2 = mm2;
|
|
|
|
if (strncmp(str1, mm1, strlen(str1)))
|
|
tst_brk(TFAIL, "failed on compare %s", tmp1);
|
|
|
|
if (strncmp(str2, mm2, strlen(str2)))
|
|
tst_brk(TFAIL, "failed on compare %s", tmp2);
|
|
|
|
SAFE_MUNMAP(mm1, LEN);
|
|
SAFE_MUNMAP(mm2, LEN);
|
|
|
|
mm1 = SAFE_MMAP(save_mm2, LEN, PROT_READ, MAP_PRIVATE, f1, 0);
|
|
mm2 = SAFE_MMAP(save_mm1, LEN, PROT_READ, MAP_PRIVATE, f2, 0);
|
|
|
|
if (mm1 != save_mm2 || mm2 != save_mm1)
|
|
tst_res(TINFO, "mmap not using same address");
|
|
|
|
if (strncmp(str1, mm1, strlen(str1)))
|
|
tst_brk(TFAIL, "failed on compare %s", tmp1);
|
|
|
|
if (strncmp(str2, mm2, strlen(str2)))
|
|
tst_brk(TFAIL, "failed on compare %s", tmp2);
|
|
|
|
tst_res(TPASS, "memory test succeeded");
|
|
}
|
|
|
|
static void setup(void)
|
|
{
|
|
f1 = SAFE_OPEN(tmp1, O_RDWR | O_CREAT, S_IREAD | S_IWRITE);
|
|
f2 = SAFE_OPEN(tmp2, O_RDWR | O_CREAT, S_IREAD | S_IWRITE);
|
|
|
|
SAFE_WRITE(1, f1, str1, strlen(str1));
|
|
SAFE_WRITE(1, f2, str2, strlen(str2));
|
|
}
|
|
|
|
static void cleanup(void)
|
|
{
|
|
if (mm1)
|
|
SAFE_MUNMAP(mm1, LEN);
|
|
|
|
if (mm2)
|
|
SAFE_MUNMAP(mm2, LEN);
|
|
|
|
if (f1 != -1)
|
|
SAFE_CLOSE(f1);
|
|
if (f2 != -1)
|
|
SAFE_CLOSE(f2);
|
|
}
|
|
|
|
static struct tst_test test = {
|
|
.needs_tmpdir = 1,
|
|
.test_all = run,
|
|
.setup = setup,
|
|
.cleanup = cleanup,
|
|
};
|
|
|