1 /* 2 * Copyright (c) 2002, Intel Corporation. All rights reserved. 3 * Copyright (c) 2012, Cyril Hrubis <chrubis (at) suse.cz> 4 * 5 * This file is licensed under the GPL license. For the full content 6 * of this license, see the COPYING file at the top level of this 7 * source tree. 8 * 9 * If MAP_FIXED is set, 10 * mmap() may return MAP_FAILED and set errno to [EINVAL]. 11 * 12 * [EINVAL] The addr argument (if MAP_FIXED was specified) or off is not a 13 * multiple of the page size as returned by sysconf(), or is considered invalid 14 * by the implementation. 15 * 16 * Test Steps: 17 * 1. Set 'addr' as an illegal address, which is not a multiple of page size; 18 * 2. Call mmap() and get EINVAL; 19 */ 20 21 #define _XOPEN_SOURCE 600 22 23 #include <stdio.h> 24 #include <stdlib.h> 25 #include <unistd.h> 26 #include <sys/mman.h> 27 #include <sys/types.h> 28 #include <sys/stat.h> 29 #include <sys/wait.h> 30 #include <fcntl.h> 31 #include <string.h> 32 #include <errno.h> 33 #include "posixtest.h" 34 35 int main(void) 36 { 37 char tmpfname[256]; 38 long page_size; 39 long total_size; 40 41 void *illegal_addr; 42 void *pa; 43 size_t size; 44 int fd, saved_errno; 45 46 page_size = sysconf(_SC_PAGE_SIZE); 47 total_size = page_size; 48 size = total_size; 49 50 /* Create tmp file */ 51 snprintf(tmpfname, sizeof(tmpfname), "/tmp/pts_mmap_9_1_%d", getpid()); 52 unlink(tmpfname); 53 fd = open(tmpfname, O_CREAT | O_RDWR | O_EXCL, S_IRUSR | S_IWUSR); 54 if (fd == -1) { 55 printf("Error at open(): %s\n", strerror(errno)); 56 return PTS_UNRESOLVED; 57 } 58 unlink(tmpfname); 59 if (ftruncate(fd, total_size) == -1) { 60 printf("Error at ftruncate(): %s\n", strerror(errno)); 61 return PTS_UNRESOLVED; 62 } 63 64 /* Map the file for the first time, to get a legal address, pa */ 65 pa = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); 66 67 if ((unsigned long)pa % page_size) { 68 printf("pa is not multiple of page_size\n"); 69 illegal_addr = pa; 70 } else { 71 printf("pa is a multiple of page_size\n"); 72 illegal_addr = pa + 1; 73 } 74 75 munmap(pa, size); 76 77 /* Mmap again using the illegal address, setting MAP_FIXED */ 78 pa = mmap(illegal_addr, size, PROT_READ | PROT_WRITE, MAP_FIXED, fd, 0); 79 80 saved_errno = errno; 81 82 close(fd); 83 munmap(pa, size); 84 85 if (pa == MAP_FAILED && saved_errno == EINVAL) { 86 printf("Test PASSED\n"); 87 return PTS_PASS; 88 } 89 90 printf("Test FAILED, mmap with MAP_FIXED did not get EINVAL" 91 " when 'addr' is illegal\n"); 92 return PTS_FAIL; 93 } 94
