1 /* 2 * Copyright (c) International Business Machines Corp., 2004 3 * Written by Robbie Williamson 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 13 * the GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 18 */ 19 20 /* 21 * Test Description: Test that a normal page cannot be mapped into a high 22 * memory region. 23 */ 24 25 #include <sys/types.h> 26 #include <sys/mman.h> 27 #include <sys/mount.h> 28 #include <sys/stat.h> 29 #include <errno.h> 30 #include <fcntl.h> 31 #include <signal.h> 32 #include <stdint.h> 33 #include <stdio.h> 34 #include <stdlib.h> 35 #include <string.h> 36 #include <unistd.h> 37 #include "test.h" 38 #include "safe_macros.h" 39 40 char *TCID = "mmap15"; 41 int TST_TOTAL = 1; 42 43 #ifdef __ia64__ 44 # define HIGH_ADDR (void *)(0xa000000000000000UL) 45 #else 46 # define HIGH_ADDR (void *)(-page_size) 47 #endif 48 49 static long page_size; 50 51 static void setup(void); 52 static void cleanup(void); 53 54 int main(int ac, char **av) 55 { 56 int lc, fd; 57 void *addr; 58 59 #if __WORDSIZE == 32 60 tst_brkm(TCONF, NULL, "This test is only for 64bit"); 61 #endif 62 63 tst_parse_opts(ac, av, NULL, NULL); 64 65 setup(); 66 67 for (lc = 0; TEST_LOOPING(lc); lc++) { 68 tst_count = 0; 69 70 fd = SAFE_OPEN(cleanup, "testfile", O_RDWR | O_CREAT, 0666); 71 72 /* Attempt to mmap into highmem addr, should get ENOMEM */ 73 addr = mmap(HIGH_ADDR, page_size, PROT_READ, 74 MAP_SHARED | MAP_FIXED, fd, 0); 75 if (addr != MAP_FAILED) { 76 tst_resm(TFAIL, "mmap into high region " 77 "succeeded unexpectedly"); 78 munmap(addr, page_size); 79 close(fd); 80 continue; 81 } 82 83 if (errno != ENOMEM) { 84 tst_resm(TFAIL | TERRNO, "mmap into high region " 85 "failed unexpectedly - expect " 86 "errno=ENOMEM, got"); 87 } else { 88 tst_resm(TPASS | TERRNO, "mmap into high region " 89 "failed as expected"); 90 } 91 92 SAFE_CLOSE(cleanup, fd); 93 } 94 95 cleanup(); 96 tst_exit(); 97 } 98 99 static void setup(void) 100 { 101 tst_require_root(); 102 103 tst_tmpdir(); 104 105 page_size = getpagesize(); 106 107 TEST_PAUSE; 108 } 109 110 static void cleanup(void) 111 { 112 tst_rmdir(); 113 } 114