plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * Copyright (c) International Business Machines Corp., 2001 |
| 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 |
Wanlong Gao | 4548c6c | 2012-10-19 18:03:36 +0800 | [diff] [blame] | 17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 18 | */ |
| 19 | |
| 20 | /* |
| 21 | * NAME |
| 22 | * modify_ldt01.c |
| 23 | * |
| 24 | * DESCRIPTION |
| 25 | * Testcase to check the error conditions for modify_ldt(2) |
| 26 | * |
| 27 | * CALLS |
| 28 | * modify_ldt() |
| 29 | * |
| 30 | * ALGORITHM |
| 31 | * block1: |
| 32 | * Invoke modify_ldt() with a func value which is neither |
| 33 | * 0 or 1. Verify that ENOSYS is set. |
| 34 | * block2: |
| 35 | * Invoke mprotect() with ptr == NULL. Verify that EINVAL |
| 36 | * is set. |
| 37 | * block3: |
| 38 | * Create an LDT segment. |
| 39 | * Try to read from an invalid pointer. |
| 40 | * Verify that EFAULT is set. |
| 41 | * |
| 42 | * USAGE |
| 43 | * modify_ldt01 |
| 44 | * |
| 45 | * HISTORY |
| 46 | * 07/2001 Ported by Wayne Boyer |
| 47 | * |
| 48 | * RESTRICTIONS |
| 49 | * None |
| 50 | */ |
| 51 | |
subrata_modak | ae5eb2c | 2008-11-18 09:00:57 +0000 | [diff] [blame] | 52 | #include "config.h" |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 53 | #include "test.h" |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 54 | |
subrata_modak | ae5eb2c | 2008-11-18 09:00:57 +0000 | [diff] [blame] | 55 | TCID_DEFINE(modify_ldt01); |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 56 | int TST_TOTAL = 1; |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 57 | |
subrata_modak | ae5eb2c | 2008-11-18 09:00:57 +0000 | [diff] [blame] | 58 | #if defined(__i386__) && defined(HAVE_MODIFY_LDT) |
| 59 | |
| 60 | #ifdef HAVE_ASM_LDT_H |
| 61 | #include <asm/ldt.h> |
| 62 | #endif |
subrata_modak | 56207ce | 2009-03-23 13:35:39 +0000 | [diff] [blame] | 63 | extern int modify_ldt(int, void *, unsigned long); |
subrata_modak | ae5eb2c | 2008-11-18 09:00:57 +0000 | [diff] [blame] | 64 | |
| 65 | #include <asm/unistd.h> |
| 66 | #include <errno.h> |
| 67 | |
| 68 | /* Newer ldt.h files use user_desc, instead of modify_ldt_ldt_s */ |
| 69 | #ifdef HAVE_STRUCT_USER_DESC |
| 70 | typedef struct user_desc modify_ldt_s; |
| 71 | #elif HAVE_STRUCT_MODIFY_LDT_LDT_S |
subrata_modak | 4bb656a | 2009-02-26 12:02:09 +0000 | [diff] [blame] | 72 | typedef struct modify_ldt_ldt_s modify_ldt_s; |
subrata_modak | ae5eb2c | 2008-11-18 09:00:57 +0000 | [diff] [blame] | 73 | #else |
subrata_modak | 56207ce | 2009-03-23 13:35:39 +0000 | [diff] [blame] | 74 | typedef struct modify_ldt_ldt_t { |
| 75 | unsigned int entry_number; |
| 76 | unsigned long int base_addr; |
| 77 | unsigned int limit; |
| 78 | unsigned int seg_32bit:1; |
| 79 | unsigned int contents:2; |
| 80 | unsigned int read_exec_only:1; |
| 81 | unsigned int limit_in_pages:1; |
| 82 | unsigned int seg_not_present:1; |
| 83 | unsigned int useable:1; |
| 84 | unsigned int empty:25; |
subrata_modak | ae5eb2c | 2008-11-18 09:00:57 +0000 | [diff] [blame] | 85 | } modify_ldt_s; |
| 86 | #endif |
robbiew | 0d0826a | 2004-06-11 19:29:13 +0000 | [diff] [blame] | 87 | |
| 88 | int create_segment(void *, size_t); |
subrata_modak | ae5eb2c | 2008-11-18 09:00:57 +0000 | [diff] [blame] | 89 | void cleanup(void); |
| 90 | void setup(void); |
robbiew | 0d0826a | 2004-06-11 19:29:13 +0000 | [diff] [blame] | 91 | |
subrata_modak | ae5eb2c | 2008-11-18 09:00:57 +0000 | [diff] [blame] | 92 | #define FAILED 1 |
| 93 | |
plars | 7408fc9 | 2002-06-12 17:37:25 +0000 | [diff] [blame] | 94 | int main(int ac, char **av) |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 95 | { |
Cyril Hrubis | 89af32a | 2012-10-24 16:39:11 +0200 | [diff] [blame] | 96 | int lc; |
Cyril Hrubis | 0b9589f | 2014-05-27 17:40:33 +0200 | [diff] [blame] | 97 | const char *msg; |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 98 | |
| 99 | void *ptr; |
| 100 | int retval, func; |
| 101 | |
subrata_modak | ae5eb2c | 2008-11-18 09:00:57 +0000 | [diff] [blame] | 102 | int flag; |
| 103 | int seg[4]; |
| 104 | |
Garrett Cooper | 45e285d | 2010-11-22 12:19:25 -0800 | [diff] [blame] | 105 | if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL) { |
Garrett Cooper | 60fa801 | 2010-11-22 13:50:58 -0800 | [diff] [blame] | 106 | tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 107 | } |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 108 | |
subrata_modak | 56207ce | 2009-03-23 13:35:39 +0000 | [diff] [blame] | 109 | setup(); /* global setup */ |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 110 | |
| 111 | /* The following loop checks looping state if -i option given */ |
| 112 | for (lc = 0; TEST_LOOPING(lc); lc++) { |
| 113 | |
Caspar Zhang | d59a659 | 2013-03-07 14:59:12 +0800 | [diff] [blame] | 114 | /* reset tst_count in case we are looping */ |
| 115 | tst_count = 0; |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 116 | |
robbiew | 860b47b | 2003-03-26 23:13:58 +0000 | [diff] [blame] | 117 | //block1: |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 118 | /* |
| 119 | * Check for ENOSYS. |
| 120 | */ |
| 121 | tst_resm(TINFO, "Enter block 1"); |
| 122 | flag = 0; |
Cyril Hrubis | d218f34 | 2014-09-23 13:14:56 +0200 | [diff] [blame] | 123 | ptr = malloc(10); |
plars | a6b81d9 | 2001-10-24 15:56:42 +0000 | [diff] [blame] | 124 | func = 100; |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 125 | retval = modify_ldt(func, ptr, sizeof(ptr)); |
| 126 | if (retval < 0) { |
| 127 | if (errno != ENOSYS) { |
| 128 | tst_resm(TFAIL, "modify_ldt() set invalid " |
subrata_modak | 56207ce | 2009-03-23 13:35:39 +0000 | [diff] [blame] | 129 | "errno, expected ENOSYS, got: %d", |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 130 | errno); |
| 131 | flag = FAILED; |
| 132 | } |
| 133 | } else { |
| 134 | tst_resm(TFAIL, "modify_ldt error: " |
| 135 | "unexpected return value %d", retval); |
| 136 | flag = FAILED; |
| 137 | } |
| 138 | |
| 139 | if (flag) { |
| 140 | tst_resm(TINFO, "block 1 FAILED"); |
| 141 | } else { |
| 142 | tst_resm(TINFO, "block 1 PASSED"); |
| 143 | } |
| 144 | tst_resm(TINFO, "Exit block 1"); |
plars | a6b81d9 | 2001-10-24 15:56:42 +0000 | [diff] [blame] | 145 | free(ptr); |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 146 | |
robbiew | 860b47b | 2003-03-26 23:13:58 +0000 | [diff] [blame] | 147 | //block2: |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 148 | /* |
| 149 | * Check for EINVAL |
| 150 | */ |
| 151 | tst_resm(TINFO, "Enter block 2"); |
| 152 | flag = 0; |
| 153 | |
| 154 | ptr = 0; |
| 155 | |
robbiew | 929d702 | 2001-09-12 18:38:29 +0000 | [diff] [blame] | 156 | retval = modify_ldt(1, ptr, sizeof(ptr)); |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 157 | if (retval < 0) { |
| 158 | if (errno != EINVAL) { |
| 159 | tst_resm(TFAIL, "modify_ldt() set invalid " |
subrata_modak | 56207ce | 2009-03-23 13:35:39 +0000 | [diff] [blame] | 160 | "errno, expected EINVAL, got: %d", |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 161 | errno); |
| 162 | flag = FAILED; |
| 163 | } |
| 164 | } else { |
| 165 | tst_resm(TFAIL, "modify_ldt error: " |
| 166 | "unexpected return value %d", retval); |
| 167 | flag = FAILED; |
| 168 | } |
| 169 | |
| 170 | if (flag) { |
| 171 | tst_resm(TINFO, "block 2 FAILED"); |
| 172 | } else { |
| 173 | tst_resm(TINFO, "block 2 PASSED"); |
| 174 | } |
| 175 | tst_resm(TINFO, "Exit block 2"); |
| 176 | |
robbiew | 860b47b | 2003-03-26 23:13:58 +0000 | [diff] [blame] | 177 | //block3: |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 178 | |
| 179 | /* |
| 180 | * Create a new LDT segment. |
| 181 | */ |
| 182 | if (create_segment(seg, sizeof(seg)) == -1) { |
| 183 | tst_brkm(TINFO, cleanup, "Creation of segment failed"); |
Wanlong Gao | 354ebb4 | 2012-12-07 10:10:04 +0800 | [diff] [blame] | 184 | } |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 185 | |
| 186 | /* |
| 187 | * Check for EFAULT |
| 188 | */ |
| 189 | ptr = sbrk(0); |
| 190 | |
| 191 | retval = modify_ldt(0, ptr + 0xFFF, sizeof(ptr)); |
| 192 | if (retval < 0) { |
| 193 | if (errno != EFAULT) { |
| 194 | tst_resm(TFAIL, "modify_ldt() set invalid " |
subrata_modak | 56207ce | 2009-03-23 13:35:39 +0000 | [diff] [blame] | 195 | "errno, expected EFAULT, got: %d", |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 196 | errno); |
| 197 | flag = FAILED; |
| 198 | } |
| 199 | } else { |
| 200 | tst_resm(TFAIL, "modify_ldt error: " |
| 201 | "unexpected return value %d", retval); |
| 202 | flag = FAILED; |
| 203 | } |
| 204 | |
| 205 | if (flag) { |
| 206 | tst_resm(TINFO, "block 3 FAILED"); |
| 207 | } else { |
| 208 | tst_resm(TINFO, "block 3 PASSED"); |
| 209 | } |
| 210 | tst_resm(TINFO, "Exit block 3"); |
| 211 | |
subrata_modak | 56207ce | 2009-03-23 13:35:39 +0000 | [diff] [blame] | 212 | } |
| 213 | cleanup(); |
Garrett Cooper | 1e6f5a6 | 2010-12-19 09:58:10 -0800 | [diff] [blame] | 214 | tst_exit(); |
Garrett Cooper | 2c28215 | 2010-12-16 00:55:50 -0800 | [diff] [blame] | 215 | |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 216 | } |
| 217 | |
subrata_modak | ae5eb2c | 2008-11-18 09:00:57 +0000 | [diff] [blame] | 218 | /* |
subrata_modak | 4bb656a | 2009-02-26 12:02:09 +0000 | [diff] [blame] | 219 | * create_segment() - |
subrata_modak | ae5eb2c | 2008-11-18 09:00:57 +0000 | [diff] [blame] | 220 | */ |
subrata_modak | 56207ce | 2009-03-23 13:35:39 +0000 | [diff] [blame] | 221 | int create_segment(void *seg, size_t size) |
plars | 7408fc9 | 2002-06-12 17:37:25 +0000 | [diff] [blame] | 222 | { |
subrata_modak | ae5eb2c | 2008-11-18 09:00:57 +0000 | [diff] [blame] | 223 | modify_ldt_s entry; |
plars | 7408fc9 | 2002-06-12 17:37:25 +0000 | [diff] [blame] | 224 | |
subrata_modak | ae5eb2c | 2008-11-18 09:00:57 +0000 | [diff] [blame] | 225 | entry.entry_number = 0; |
| 226 | entry.base_addr = (unsigned long)seg; |
| 227 | entry.limit = size; |
| 228 | entry.seg_32bit = 1; |
| 229 | entry.contents = 0; |
| 230 | entry.read_exec_only = 0; |
| 231 | entry.limit_in_pages = 0; |
| 232 | entry.seg_not_present = 0; |
| 233 | |
| 234 | return modify_ldt(1, &entry, sizeof(entry)); |
| 235 | } |
plars | 7408fc9 | 2002-06-12 17:37:25 +0000 | [diff] [blame] | 236 | |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 237 | /* |
| 238 | * setup() - performs all ONE TIME setup for this test |
| 239 | */ |
subrata_modak | 56207ce | 2009-03-23 13:35:39 +0000 | [diff] [blame] | 240 | void setup(void) |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 241 | { |
Garrett Cooper | 2c28215 | 2010-12-16 00:55:50 -0800 | [diff] [blame] | 242 | |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 243 | tst_sig(FORK, DEF_HANDLER, cleanup); |
| 244 | |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 245 | TEST_PAUSE; |
| 246 | } |
| 247 | |
| 248 | /* |
| 249 | * cleanup() - performs all the ONE TIME cleanup for this test at completion |
| 250 | * or premature exit. |
| 251 | */ |
subrata_modak | 56207ce | 2009-03-23 13:35:39 +0000 | [diff] [blame] | 252 | void cleanup(void) |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 253 | { |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 254 | |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 255 | } |
| 256 | |
subrata_modak | ae5eb2c | 2008-11-18 09:00:57 +0000 | [diff] [blame] | 257 | #elif HAVE_MODIFY_LDT |
Mike Frysinger | c57fba5 | 2014-04-09 18:56:30 -0400 | [diff] [blame] | 258 | int main(void) |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 259 | { |
Cyril Hrubis | 526fdf8 | 2014-12-04 14:35:01 +0100 | [diff] [blame] | 260 | tst_brkm(TCONF, |
| 261 | NULL, |
subrata_modak | 56207ce | 2009-03-23 13:35:39 +0000 | [diff] [blame] | 262 | "modify_ldt is available but not tested on the platform than __i386__"); |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 263 | } |
subrata_modak | ae5eb2c | 2008-11-18 09:00:57 +0000 | [diff] [blame] | 264 | |
| 265 | #else |
Mike Frysinger | c57fba5 | 2014-04-09 18:56:30 -0400 | [diff] [blame] | 266 | int main(void) |
subrata_modak | ae5eb2c | 2008-11-18 09:00:57 +0000 | [diff] [blame] | 267 | { |
| 268 | tst_resm(TINFO, "modify_ldt01 test only for ix86"); |
Garrett Cooper | 2c28215 | 2010-12-16 00:55:50 -0800 | [diff] [blame] | 269 | tst_exit(); |
subrata_modak | ae5eb2c | 2008-11-18 09:00:57 +0000 | [diff] [blame] | 270 | } |
| 271 | |
Chris Dearman | ec6edca | 2012-10-17 19:54:01 -0700 | [diff] [blame] | 272 | #endif /* defined(__i386__) */ |