Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 1 | /* |
| 2 | * kgdbts is a test suite for kgdb for the sole purpose of validating |
| 3 | * that key pieces of the kgdb internals are working properly such as |
| 4 | * HW/SW breakpoints, single stepping, and NMI. |
| 5 | * |
| 6 | * Created by: Jason Wessel <jason.wessel@windriver.com> |
| 7 | * |
| 8 | * Copyright (c) 2008 Wind River Systems, Inc. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License version 2 as |
| 12 | * published by the Free Software Foundation. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| 17 | * See the GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 22 | */ |
| 23 | /* Information about the kgdb test suite. |
| 24 | * ------------------------------------- |
| 25 | * |
| 26 | * The kgdb test suite is designed as a KGDB I/O module which |
| 27 | * simulates the communications that a debugger would have with kgdb. |
| 28 | * The tests are broken up in to a line by line and referenced here as |
| 29 | * a "get" which is kgdb requesting input and "put" which is kgdb |
| 30 | * sending a response. |
| 31 | * |
| 32 | * The kgdb suite can be invoked from the kernel command line |
| 33 | * arguments system or executed dynamically at run time. The test |
| 34 | * suite uses the variable "kgdbts" to obtain the information about |
| 35 | * which tests to run and to configure the verbosity level. The |
| 36 | * following are the various characters you can use with the kgdbts= |
| 37 | * line: |
| 38 | * |
| 39 | * When using the "kgdbts=" you only choose one of the following core |
| 40 | * test types: |
| 41 | * A = Run all the core tests silently |
| 42 | * V1 = Run all the core tests with minimal output |
| 43 | * V2 = Run all the core tests in debug mode |
| 44 | * |
| 45 | * You can also specify optional tests: |
| 46 | * N## = Go to sleep with interrupts of for ## seconds |
| 47 | * to test the HW NMI watchdog |
| 48 | * F## = Break at do_fork for ## iterations |
| 49 | * S## = Break at sys_open for ## iterations |
Jason Wessel | 7cfcd985 | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 50 | * I## = Run the single step test ## iterations |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 51 | * |
| 52 | * NOTE: that the do_fork and sys_open tests are mutually exclusive. |
| 53 | * |
| 54 | * To invoke the kgdb test suite from boot you use a kernel start |
| 55 | * argument as follows: |
| 56 | * kgdbts=V1 kgdbwait |
| 57 | * Or if you wanted to perform the NMI test for 6 seconds and do_fork |
| 58 | * test for 100 forks, you could use: |
| 59 | * kgdbts=V1N6F100 kgdbwait |
| 60 | * |
| 61 | * The test suite can also be invoked at run time with: |
| 62 | * echo kgdbts=V1N6F100 > /sys/module/kgdbts/parameters/kgdbts |
| 63 | * Or as another example: |
| 64 | * echo kgdbts=V2 > /sys/module/kgdbts/parameters/kgdbts |
| 65 | * |
| 66 | * When developing a new kgdb arch specific implementation or |
| 67 | * using these tests for the purpose of regression testing, |
| 68 | * several invocations are required. |
| 69 | * |
| 70 | * 1) Boot with the test suite enabled by using the kernel arguments |
| 71 | * "kgdbts=V1F100 kgdbwait" |
| 72 | * ## If kgdb arch specific implementation has NMI use |
| 73 | * "kgdbts=V1N6F100 |
| 74 | * |
| 75 | * 2) After the system boot run the basic test. |
| 76 | * echo kgdbts=V1 > /sys/module/kgdbts/parameters/kgdbts |
| 77 | * |
| 78 | * 3) Run the concurrency tests. It is best to use n+1 |
| 79 | * while loops where n is the number of cpus you have |
| 80 | * in your system. The example below uses only two |
| 81 | * loops. |
| 82 | * |
| 83 | * ## This tests break points on sys_open |
| 84 | * while [ 1 ] ; do find / > /dev/null 2>&1 ; done & |
| 85 | * while [ 1 ] ; do find / > /dev/null 2>&1 ; done & |
| 86 | * echo kgdbts=V1S10000 > /sys/module/kgdbts/parameters/kgdbts |
| 87 | * fg # and hit control-c |
| 88 | * fg # and hit control-c |
| 89 | * ## This tests break points on do_fork |
| 90 | * while [ 1 ] ; do date > /dev/null ; done & |
| 91 | * while [ 1 ] ; do date > /dev/null ; done & |
| 92 | * echo kgdbts=V1F1000 > /sys/module/kgdbts/parameters/kgdbts |
| 93 | * fg # and hit control-c |
| 94 | * |
| 95 | */ |
| 96 | |
| 97 | #include <linux/kernel.h> |
| 98 | #include <linux/kgdb.h> |
| 99 | #include <linux/ctype.h> |
| 100 | #include <linux/uaccess.h> |
| 101 | #include <linux/syscalls.h> |
| 102 | #include <linux/nmi.h> |
| 103 | #include <linux/delay.h> |
| 104 | #include <linux/kthread.h> |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 105 | |
| 106 | #define v1printk(a...) do { \ |
| 107 | if (verbose) \ |
| 108 | printk(KERN_INFO a); \ |
| 109 | } while (0) |
| 110 | #define v2printk(a...) do { \ |
| 111 | if (verbose > 1) \ |
| 112 | printk(KERN_INFO a); \ |
| 113 | touch_nmi_watchdog(); \ |
| 114 | } while (0) |
Jason Wessel | 974460c | 2008-03-20 13:43:44 -0500 | [diff] [blame] | 115 | #define eprintk(a...) do { \ |
| 116 | printk(KERN_ERR a); \ |
| 117 | WARN_ON(1); \ |
| 118 | } while (0) |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 119 | #define MAX_CONFIG_LEN 40 |
| 120 | |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 121 | static struct kgdb_io kgdbts_io_ops; |
| 122 | static char get_buf[BUFMAX]; |
| 123 | static int get_buf_cnt; |
| 124 | static char put_buf[BUFMAX]; |
| 125 | static int put_buf_cnt; |
| 126 | static char scratch_buf[BUFMAX]; |
| 127 | static int verbose; |
| 128 | static int repeat_test; |
| 129 | static int test_complete; |
| 130 | static int send_ack; |
| 131 | static int final_ack; |
Jason Wessel | b33cb81 | 2008-05-28 12:49:57 -0500 | [diff] [blame] | 132 | static int force_hwbrks; |
| 133 | static int hwbreaks_ok; |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 134 | static int hw_break_val; |
| 135 | static int hw_break_val2; |
David S. Miller | 4d7ffa4 | 2008-04-29 01:36:14 -0700 | [diff] [blame] | 136 | #if defined(CONFIG_ARM) || defined(CONFIG_MIPS) || defined(CONFIG_SPARC) |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 137 | static int arch_needs_sstep_emulation = 1; |
| 138 | #else |
| 139 | static int arch_needs_sstep_emulation; |
| 140 | #endif |
| 141 | static unsigned long sstep_addr; |
| 142 | static int sstep_state; |
| 143 | |
| 144 | /* Storage for the registers, in GDB format. */ |
| 145 | static unsigned long kgdbts_gdb_regs[(NUMREGBYTES + |
| 146 | sizeof(unsigned long) - 1) / |
| 147 | sizeof(unsigned long)]; |
| 148 | static struct pt_regs kgdbts_regs; |
| 149 | |
| 150 | /* -1 = init not run yet, 0 = unconfigured, 1 = configured. */ |
| 151 | static int configured = -1; |
| 152 | |
Jason Wessel | 974460c | 2008-03-20 13:43:44 -0500 | [diff] [blame] | 153 | #ifdef CONFIG_KGDB_TESTS_BOOT_STRING |
| 154 | static char config[MAX_CONFIG_LEN] = CONFIG_KGDB_TESTS_BOOT_STRING; |
| 155 | #else |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 156 | static char config[MAX_CONFIG_LEN]; |
Jason Wessel | 974460c | 2008-03-20 13:43:44 -0500 | [diff] [blame] | 157 | #endif |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 158 | static struct kparam_string kps = { |
| 159 | .string = config, |
| 160 | .maxlen = MAX_CONFIG_LEN, |
| 161 | }; |
| 162 | |
| 163 | static void fill_get_buf(char *buf); |
| 164 | |
| 165 | struct test_struct { |
| 166 | char *get; |
| 167 | char *put; |
| 168 | void (*get_handler)(char *); |
| 169 | int (*put_handler)(char *, char *); |
| 170 | }; |
| 171 | |
| 172 | struct test_state { |
| 173 | char *name; |
| 174 | struct test_struct *tst; |
| 175 | int idx; |
| 176 | int (*run_test) (int, int); |
| 177 | int (*validate_put) (char *); |
| 178 | }; |
| 179 | |
| 180 | static struct test_state ts; |
| 181 | |
| 182 | static int kgdbts_unreg_thread(void *ptr) |
| 183 | { |
| 184 | /* Wait until the tests are complete and then ungresiter the I/O |
| 185 | * driver. |
| 186 | */ |
| 187 | while (!final_ack) |
| 188 | msleep_interruptible(1500); |
| 189 | |
| 190 | if (configured) |
| 191 | kgdb_unregister_io_module(&kgdbts_io_ops); |
| 192 | configured = 0; |
| 193 | |
| 194 | return 0; |
| 195 | } |
| 196 | |
| 197 | /* This is noinline such that it can be used for a single location to |
| 198 | * place a breakpoint |
| 199 | */ |
| 200 | static noinline void kgdbts_break_test(void) |
| 201 | { |
| 202 | v2printk("kgdbts: breakpoint complete\n"); |
| 203 | } |
| 204 | |
| 205 | /* Lookup symbol info in the kernel */ |
| 206 | static unsigned long lookup_addr(char *arg) |
| 207 | { |
| 208 | unsigned long addr = 0; |
| 209 | |
| 210 | if (!strcmp(arg, "kgdbts_break_test")) |
| 211 | addr = (unsigned long)kgdbts_break_test; |
| 212 | else if (!strcmp(arg, "sys_open")) |
| 213 | addr = (unsigned long)sys_open; |
| 214 | else if (!strcmp(arg, "do_fork")) |
| 215 | addr = (unsigned long)do_fork; |
| 216 | else if (!strcmp(arg, "hw_break_val")) |
| 217 | addr = (unsigned long)&hw_break_val; |
| 218 | return addr; |
| 219 | } |
| 220 | |
| 221 | static void break_helper(char *bp_type, char *arg, unsigned long vaddr) |
| 222 | { |
| 223 | unsigned long addr; |
| 224 | |
| 225 | if (arg) |
| 226 | addr = lookup_addr(arg); |
| 227 | else |
| 228 | addr = vaddr; |
| 229 | |
| 230 | sprintf(scratch_buf, "%s,%lx,%i", bp_type, addr, |
| 231 | BREAK_INSTR_SIZE); |
| 232 | fill_get_buf(scratch_buf); |
| 233 | } |
| 234 | |
| 235 | static void sw_break(char *arg) |
| 236 | { |
Jason Wessel | b33cb81 | 2008-05-28 12:49:57 -0500 | [diff] [blame] | 237 | break_helper(force_hwbrks ? "Z1" : "Z0", arg, 0); |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 238 | } |
| 239 | |
| 240 | static void sw_rem_break(char *arg) |
| 241 | { |
Jason Wessel | b33cb81 | 2008-05-28 12:49:57 -0500 | [diff] [blame] | 242 | break_helper(force_hwbrks ? "z1" : "z0", arg, 0); |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 243 | } |
| 244 | |
| 245 | static void hw_break(char *arg) |
| 246 | { |
| 247 | break_helper("Z1", arg, 0); |
| 248 | } |
| 249 | |
| 250 | static void hw_rem_break(char *arg) |
| 251 | { |
| 252 | break_helper("z1", arg, 0); |
| 253 | } |
| 254 | |
| 255 | static void hw_write_break(char *arg) |
| 256 | { |
| 257 | break_helper("Z2", arg, 0); |
| 258 | } |
| 259 | |
| 260 | static void hw_rem_write_break(char *arg) |
| 261 | { |
| 262 | break_helper("z2", arg, 0); |
| 263 | } |
| 264 | |
| 265 | static void hw_access_break(char *arg) |
| 266 | { |
| 267 | break_helper("Z4", arg, 0); |
| 268 | } |
| 269 | |
| 270 | static void hw_rem_access_break(char *arg) |
| 271 | { |
| 272 | break_helper("z4", arg, 0); |
| 273 | } |
| 274 | |
| 275 | static void hw_break_val_access(void) |
| 276 | { |
| 277 | hw_break_val2 = hw_break_val; |
| 278 | } |
| 279 | |
| 280 | static void hw_break_val_write(void) |
| 281 | { |
| 282 | hw_break_val++; |
| 283 | } |
| 284 | |
| 285 | static int check_and_rewind_pc(char *put_str, char *arg) |
| 286 | { |
| 287 | unsigned long addr = lookup_addr(arg); |
| 288 | int offset = 0; |
| 289 | |
| 290 | kgdb_hex2mem(&put_str[1], (char *)kgdbts_gdb_regs, |
| 291 | NUMREGBYTES); |
| 292 | gdb_regs_to_pt_regs(kgdbts_gdb_regs, &kgdbts_regs); |
| 293 | v2printk("Stopped at IP: %lx\n", instruction_pointer(&kgdbts_regs)); |
| 294 | #ifdef CONFIG_X86 |
| 295 | /* On x86 a breakpoint stop requires it to be decremented */ |
| 296 | if (addr + 1 == kgdbts_regs.ip) |
| 297 | offset = -1; |
Jason Wessel | cad08ac | 2010-04-02 11:31:35 -0500 | [diff] [blame] | 298 | #elif defined(CONFIG_SUPERH) |
| 299 | /* On SUPERH a breakpoint stop requires it to be decremented */ |
| 300 | if (addr + 2 == kgdbts_regs.pc) |
| 301 | offset = -2; |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 302 | #endif |
| 303 | if (strcmp(arg, "silent") && |
| 304 | instruction_pointer(&kgdbts_regs) + offset != addr) { |
Jason Wessel | 974460c | 2008-03-20 13:43:44 -0500 | [diff] [blame] | 305 | eprintk("kgdbts: BP mismatch %lx expected %lx\n", |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 306 | instruction_pointer(&kgdbts_regs) + offset, addr); |
| 307 | return 1; |
| 308 | } |
| 309 | #ifdef CONFIG_X86 |
| 310 | /* On x86 adjust the instruction pointer if needed */ |
| 311 | kgdbts_regs.ip += offset; |
Jason Wessel | cad08ac | 2010-04-02 11:31:35 -0500 | [diff] [blame] | 312 | #elif defined(CONFIG_SUPERH) |
| 313 | kgdbts_regs.pc += offset; |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 314 | #endif |
| 315 | return 0; |
| 316 | } |
| 317 | |
| 318 | static int check_single_step(char *put_str, char *arg) |
| 319 | { |
| 320 | unsigned long addr = lookup_addr(arg); |
| 321 | /* |
| 322 | * From an arch indepent point of view the instruction pointer |
| 323 | * should be on a different instruction |
| 324 | */ |
| 325 | kgdb_hex2mem(&put_str[1], (char *)kgdbts_gdb_regs, |
| 326 | NUMREGBYTES); |
| 327 | gdb_regs_to_pt_regs(kgdbts_gdb_regs, &kgdbts_regs); |
| 328 | v2printk("Singlestep stopped at IP: %lx\n", |
| 329 | instruction_pointer(&kgdbts_regs)); |
| 330 | if (instruction_pointer(&kgdbts_regs) == addr) { |
Jason Wessel | 974460c | 2008-03-20 13:43:44 -0500 | [diff] [blame] | 331 | eprintk("kgdbts: SingleStep failed at %lx\n", |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 332 | instruction_pointer(&kgdbts_regs)); |
| 333 | return 1; |
| 334 | } |
| 335 | |
| 336 | return 0; |
| 337 | } |
| 338 | |
| 339 | static void write_regs(char *arg) |
| 340 | { |
| 341 | memset(scratch_buf, 0, sizeof(scratch_buf)); |
| 342 | scratch_buf[0] = 'G'; |
| 343 | pt_regs_to_gdb_regs(kgdbts_gdb_regs, &kgdbts_regs); |
| 344 | kgdb_mem2hex((char *)kgdbts_gdb_regs, &scratch_buf[1], NUMREGBYTES); |
| 345 | fill_get_buf(scratch_buf); |
| 346 | } |
| 347 | |
| 348 | static void skip_back_repeat_test(char *arg) |
| 349 | { |
| 350 | int go_back = simple_strtol(arg, NULL, 10); |
| 351 | |
| 352 | repeat_test--; |
| 353 | if (repeat_test <= 0) |
| 354 | ts.idx++; |
| 355 | else |
| 356 | ts.idx -= go_back; |
| 357 | fill_get_buf(ts.tst[ts.idx].get); |
| 358 | } |
| 359 | |
| 360 | static int got_break(char *put_str, char *arg) |
| 361 | { |
| 362 | test_complete = 1; |
| 363 | if (!strncmp(put_str+1, arg, 2)) { |
| 364 | if (!strncmp(arg, "T0", 2)) |
| 365 | test_complete = 2; |
| 366 | return 0; |
| 367 | } |
| 368 | return 1; |
| 369 | } |
| 370 | |
| 371 | static void emul_sstep_get(char *arg) |
| 372 | { |
| 373 | if (!arch_needs_sstep_emulation) { |
| 374 | fill_get_buf(arg); |
| 375 | return; |
| 376 | } |
| 377 | switch (sstep_state) { |
| 378 | case 0: |
| 379 | v2printk("Emulate single step\n"); |
| 380 | /* Start by looking at the current PC */ |
| 381 | fill_get_buf("g"); |
| 382 | break; |
| 383 | case 1: |
| 384 | /* set breakpoint */ |
Harvey Harrison | 001fddf | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 385 | break_helper("Z0", NULL, sstep_addr); |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 386 | break; |
| 387 | case 2: |
| 388 | /* Continue */ |
| 389 | fill_get_buf("c"); |
| 390 | break; |
| 391 | case 3: |
| 392 | /* Clear breakpoint */ |
Harvey Harrison | 001fddf | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 393 | break_helper("z0", NULL, sstep_addr); |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 394 | break; |
| 395 | default: |
Jason Wessel | 974460c | 2008-03-20 13:43:44 -0500 | [diff] [blame] | 396 | eprintk("kgdbts: ERROR failed sstep get emulation\n"); |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 397 | } |
| 398 | sstep_state++; |
| 399 | } |
| 400 | |
| 401 | static int emul_sstep_put(char *put_str, char *arg) |
| 402 | { |
| 403 | if (!arch_needs_sstep_emulation) { |
| 404 | if (!strncmp(put_str+1, arg, 2)) |
| 405 | return 0; |
| 406 | return 1; |
| 407 | } |
| 408 | switch (sstep_state) { |
| 409 | case 1: |
| 410 | /* validate the "g" packet to get the IP */ |
| 411 | kgdb_hex2mem(&put_str[1], (char *)kgdbts_gdb_regs, |
| 412 | NUMREGBYTES); |
| 413 | gdb_regs_to_pt_regs(kgdbts_gdb_regs, &kgdbts_regs); |
| 414 | v2printk("Stopped at IP: %lx\n", |
| 415 | instruction_pointer(&kgdbts_regs)); |
| 416 | /* Want to stop at IP + break instruction size by default */ |
| 417 | sstep_addr = instruction_pointer(&kgdbts_regs) + |
| 418 | BREAK_INSTR_SIZE; |
| 419 | break; |
| 420 | case 2: |
| 421 | if (strncmp(put_str, "$OK", 3)) { |
Jason Wessel | 974460c | 2008-03-20 13:43:44 -0500 | [diff] [blame] | 422 | eprintk("kgdbts: failed sstep break set\n"); |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 423 | return 1; |
| 424 | } |
| 425 | break; |
| 426 | case 3: |
| 427 | if (strncmp(put_str, "$T0", 3)) { |
Jason Wessel | 974460c | 2008-03-20 13:43:44 -0500 | [diff] [blame] | 428 | eprintk("kgdbts: failed continue sstep\n"); |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 429 | return 1; |
| 430 | } |
| 431 | break; |
| 432 | case 4: |
| 433 | if (strncmp(put_str, "$OK", 3)) { |
Jason Wessel | 974460c | 2008-03-20 13:43:44 -0500 | [diff] [blame] | 434 | eprintk("kgdbts: failed sstep break unset\n"); |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 435 | return 1; |
| 436 | } |
| 437 | /* Single step is complete so continue on! */ |
| 438 | sstep_state = 0; |
| 439 | return 0; |
| 440 | default: |
Jason Wessel | 974460c | 2008-03-20 13:43:44 -0500 | [diff] [blame] | 441 | eprintk("kgdbts: ERROR failed sstep put emulation\n"); |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 442 | } |
| 443 | |
| 444 | /* Continue on the same test line until emulation is complete */ |
| 445 | ts.idx--; |
| 446 | return 0; |
| 447 | } |
| 448 | |
| 449 | static int final_ack_set(char *put_str, char *arg) |
| 450 | { |
| 451 | if (strncmp(put_str+1, arg, 2)) |
| 452 | return 1; |
| 453 | final_ack = 1; |
| 454 | return 0; |
| 455 | } |
| 456 | /* |
| 457 | * Test to plant a breakpoint and detach, which should clear out the |
| 458 | * breakpoint and restore the original instruction. |
| 459 | */ |
| 460 | static struct test_struct plant_and_detach_test[] = { |
| 461 | { "?", "S0*" }, /* Clear break points */ |
| 462 | { "kgdbts_break_test", "OK", sw_break, }, /* set sw breakpoint */ |
| 463 | { "D", "OK" }, /* Detach */ |
| 464 | { "", "" }, |
| 465 | }; |
| 466 | |
| 467 | /* |
| 468 | * Simple test to write in a software breakpoint, check for the |
| 469 | * correct stop location and detach. |
| 470 | */ |
| 471 | static struct test_struct sw_breakpoint_test[] = { |
| 472 | { "?", "S0*" }, /* Clear break points */ |
| 473 | { "kgdbts_break_test", "OK", sw_break, }, /* set sw breakpoint */ |
| 474 | { "c", "T0*", }, /* Continue */ |
Harvey Harrison | 001fddf | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 475 | { "g", "kgdbts_break_test", NULL, check_and_rewind_pc }, |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 476 | { "write", "OK", write_regs }, |
| 477 | { "kgdbts_break_test", "OK", sw_rem_break }, /*remove breakpoint */ |
| 478 | { "D", "OK" }, /* Detach */ |
Harvey Harrison | 001fddf | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 479 | { "D", "OK", NULL, got_break }, /* On success we made it here */ |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 480 | { "", "" }, |
| 481 | }; |
| 482 | |
| 483 | /* |
| 484 | * Test a known bad memory read location to test the fault handler and |
| 485 | * read bytes 1-8 at the bad address |
| 486 | */ |
| 487 | static struct test_struct bad_read_test[] = { |
| 488 | { "?", "S0*" }, /* Clear break points */ |
| 489 | { "m0,1", "E*" }, /* read 1 byte at address 1 */ |
| 490 | { "m0,2", "E*" }, /* read 1 byte at address 2 */ |
| 491 | { "m0,3", "E*" }, /* read 1 byte at address 3 */ |
| 492 | { "m0,4", "E*" }, /* read 1 byte at address 4 */ |
| 493 | { "m0,5", "E*" }, /* read 1 byte at address 5 */ |
| 494 | { "m0,6", "E*" }, /* read 1 byte at address 6 */ |
| 495 | { "m0,7", "E*" }, /* read 1 byte at address 7 */ |
| 496 | { "m0,8", "E*" }, /* read 1 byte at address 8 */ |
| 497 | { "D", "OK" }, /* Detach which removes all breakpoints and continues */ |
| 498 | { "", "" }, |
| 499 | }; |
| 500 | |
| 501 | /* |
| 502 | * Test for hitting a breakpoint, remove it, single step, plant it |
| 503 | * again and detach. |
| 504 | */ |
| 505 | static struct test_struct singlestep_break_test[] = { |
| 506 | { "?", "S0*" }, /* Clear break points */ |
| 507 | { "kgdbts_break_test", "OK", sw_break, }, /* set sw breakpoint */ |
| 508 | { "c", "T0*", }, /* Continue */ |
Harvey Harrison | 001fddf | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 509 | { "g", "kgdbts_break_test", NULL, check_and_rewind_pc }, |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 510 | { "write", "OK", write_regs }, /* Write registers */ |
| 511 | { "kgdbts_break_test", "OK", sw_rem_break }, /*remove breakpoint */ |
| 512 | { "s", "T0*", emul_sstep_get, emul_sstep_put }, /* Single step */ |
Harvey Harrison | 001fddf | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 513 | { "g", "kgdbts_break_test", NULL, check_single_step }, |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 514 | { "kgdbts_break_test", "OK", sw_break, }, /* set sw breakpoint */ |
| 515 | { "c", "T0*", }, /* Continue */ |
Harvey Harrison | 001fddf | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 516 | { "g", "kgdbts_break_test", NULL, check_and_rewind_pc }, |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 517 | { "write", "OK", write_regs }, /* Write registers */ |
| 518 | { "D", "OK" }, /* Remove all breakpoints and continues */ |
| 519 | { "", "" }, |
| 520 | }; |
| 521 | |
| 522 | /* |
| 523 | * Test for hitting a breakpoint at do_fork for what ever the number |
| 524 | * of iterations required by the variable repeat_test. |
| 525 | */ |
| 526 | static struct test_struct do_fork_test[] = { |
| 527 | { "?", "S0*" }, /* Clear break points */ |
| 528 | { "do_fork", "OK", sw_break, }, /* set sw breakpoint */ |
| 529 | { "c", "T0*", }, /* Continue */ |
Harvey Harrison | 001fddf | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 530 | { "g", "do_fork", NULL, check_and_rewind_pc }, /* check location */ |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 531 | { "write", "OK", write_regs }, /* Write registers */ |
| 532 | { "do_fork", "OK", sw_rem_break }, /*remove breakpoint */ |
| 533 | { "s", "T0*", emul_sstep_get, emul_sstep_put }, /* Single step */ |
Harvey Harrison | 001fddf | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 534 | { "g", "do_fork", NULL, check_single_step }, |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 535 | { "do_fork", "OK", sw_break, }, /* set sw breakpoint */ |
| 536 | { "7", "T0*", skip_back_repeat_test }, /* Loop based on repeat_test */ |
Harvey Harrison | 001fddf | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 537 | { "D", "OK", NULL, final_ack_set }, /* detach and unregister I/O */ |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 538 | { "", "" }, |
| 539 | }; |
| 540 | |
| 541 | /* Test for hitting a breakpoint at sys_open for what ever the number |
| 542 | * of iterations required by the variable repeat_test. |
| 543 | */ |
| 544 | static struct test_struct sys_open_test[] = { |
| 545 | { "?", "S0*" }, /* Clear break points */ |
| 546 | { "sys_open", "OK", sw_break, }, /* set sw breakpoint */ |
| 547 | { "c", "T0*", }, /* Continue */ |
Harvey Harrison | 001fddf | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 548 | { "g", "sys_open", NULL, check_and_rewind_pc }, /* check location */ |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 549 | { "write", "OK", write_regs }, /* Write registers */ |
| 550 | { "sys_open", "OK", sw_rem_break }, /*remove breakpoint */ |
| 551 | { "s", "T0*", emul_sstep_get, emul_sstep_put }, /* Single step */ |
Harvey Harrison | 001fddf | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 552 | { "g", "sys_open", NULL, check_single_step }, |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 553 | { "sys_open", "OK", sw_break, }, /* set sw breakpoint */ |
| 554 | { "7", "T0*", skip_back_repeat_test }, /* Loop based on repeat_test */ |
Harvey Harrison | 001fddf | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 555 | { "D", "OK", NULL, final_ack_set }, /* detach and unregister I/O */ |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 556 | { "", "" }, |
| 557 | }; |
| 558 | |
| 559 | /* |
| 560 | * Test for hitting a simple hw breakpoint |
| 561 | */ |
| 562 | static struct test_struct hw_breakpoint_test[] = { |
| 563 | { "?", "S0*" }, /* Clear break points */ |
| 564 | { "kgdbts_break_test", "OK", hw_break, }, /* set hw breakpoint */ |
| 565 | { "c", "T0*", }, /* Continue */ |
Harvey Harrison | 001fddf | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 566 | { "g", "kgdbts_break_test", NULL, check_and_rewind_pc }, |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 567 | { "write", "OK", write_regs }, |
| 568 | { "kgdbts_break_test", "OK", hw_rem_break }, /*remove breakpoint */ |
| 569 | { "D", "OK" }, /* Detach */ |
Harvey Harrison | 001fddf | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 570 | { "D", "OK", NULL, got_break }, /* On success we made it here */ |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 571 | { "", "" }, |
| 572 | }; |
| 573 | |
| 574 | /* |
| 575 | * Test for hitting a hw write breakpoint |
| 576 | */ |
| 577 | static struct test_struct hw_write_break_test[] = { |
| 578 | { "?", "S0*" }, /* Clear break points */ |
| 579 | { "hw_break_val", "OK", hw_write_break, }, /* set hw breakpoint */ |
Harvey Harrison | 001fddf | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 580 | { "c", "T0*", NULL, got_break }, /* Continue */ |
| 581 | { "g", "silent", NULL, check_and_rewind_pc }, |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 582 | { "write", "OK", write_regs }, |
| 583 | { "hw_break_val", "OK", hw_rem_write_break }, /*remove breakpoint */ |
| 584 | { "D", "OK" }, /* Detach */ |
Harvey Harrison | 001fddf | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 585 | { "D", "OK", NULL, got_break }, /* On success we made it here */ |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 586 | { "", "" }, |
| 587 | }; |
| 588 | |
| 589 | /* |
| 590 | * Test for hitting a hw access breakpoint |
| 591 | */ |
| 592 | static struct test_struct hw_access_break_test[] = { |
| 593 | { "?", "S0*" }, /* Clear break points */ |
| 594 | { "hw_break_val", "OK", hw_access_break, }, /* set hw breakpoint */ |
Harvey Harrison | 001fddf | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 595 | { "c", "T0*", NULL, got_break }, /* Continue */ |
| 596 | { "g", "silent", NULL, check_and_rewind_pc }, |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 597 | { "write", "OK", write_regs }, |
| 598 | { "hw_break_val", "OK", hw_rem_access_break }, /*remove breakpoint */ |
| 599 | { "D", "OK" }, /* Detach */ |
Harvey Harrison | 001fddf | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 600 | { "D", "OK", NULL, got_break }, /* On success we made it here */ |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 601 | { "", "" }, |
| 602 | }; |
| 603 | |
| 604 | /* |
| 605 | * Test for hitting a hw access breakpoint |
| 606 | */ |
| 607 | static struct test_struct nmi_sleep_test[] = { |
| 608 | { "?", "S0*" }, /* Clear break points */ |
Harvey Harrison | 001fddf | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 609 | { "c", "T0*", NULL, got_break }, /* Continue */ |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 610 | { "D", "OK" }, /* Detach */ |
Harvey Harrison | 001fddf | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 611 | { "D", "OK", NULL, got_break }, /* On success we made it here */ |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 612 | { "", "" }, |
| 613 | }; |
| 614 | |
| 615 | static void fill_get_buf(char *buf) |
| 616 | { |
| 617 | unsigned char checksum = 0; |
| 618 | int count = 0; |
| 619 | char ch; |
| 620 | |
| 621 | strcpy(get_buf, "$"); |
| 622 | strcat(get_buf, buf); |
| 623 | while ((ch = buf[count])) { |
| 624 | checksum += ch; |
| 625 | count++; |
| 626 | } |
| 627 | strcat(get_buf, "#"); |
Harvey Harrison | 827e609 | 2008-05-28 12:49:56 -0500 | [diff] [blame] | 628 | get_buf[count + 2] = hex_asc_hi(checksum); |
| 629 | get_buf[count + 3] = hex_asc_lo(checksum); |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 630 | get_buf[count + 4] = '\0'; |
| 631 | v2printk("get%i: %s\n", ts.idx, get_buf); |
| 632 | } |
| 633 | |
| 634 | static int validate_simple_test(char *put_str) |
| 635 | { |
| 636 | char *chk_str; |
| 637 | |
| 638 | if (ts.tst[ts.idx].put_handler) |
| 639 | return ts.tst[ts.idx].put_handler(put_str, |
| 640 | ts.tst[ts.idx].put); |
| 641 | |
| 642 | chk_str = ts.tst[ts.idx].put; |
| 643 | if (*put_str == '$') |
| 644 | put_str++; |
| 645 | |
| 646 | while (*chk_str != '\0' && *put_str != '\0') { |
| 647 | /* If someone does a * to match the rest of the string, allow |
| 648 | * it, or stop if the recieved string is complete. |
| 649 | */ |
| 650 | if (*put_str == '#' || *chk_str == '*') |
| 651 | return 0; |
| 652 | if (*put_str != *chk_str) |
| 653 | return 1; |
| 654 | |
| 655 | chk_str++; |
| 656 | put_str++; |
| 657 | } |
| 658 | if (*chk_str == '\0' && (*put_str == '\0' || *put_str == '#')) |
| 659 | return 0; |
| 660 | |
| 661 | return 1; |
| 662 | } |
| 663 | |
| 664 | static int run_simple_test(int is_get_char, int chr) |
| 665 | { |
| 666 | int ret = 0; |
| 667 | if (is_get_char) { |
| 668 | /* Send an ACK on the get if a prior put completed and set the |
| 669 | * send ack variable |
| 670 | */ |
| 671 | if (send_ack) { |
| 672 | send_ack = 0; |
| 673 | return '+'; |
| 674 | } |
| 675 | /* On the first get char, fill the transmit buffer and then |
| 676 | * take from the get_string. |
| 677 | */ |
| 678 | if (get_buf_cnt == 0) { |
| 679 | if (ts.tst[ts.idx].get_handler) |
| 680 | ts.tst[ts.idx].get_handler(ts.tst[ts.idx].get); |
| 681 | else |
| 682 | fill_get_buf(ts.tst[ts.idx].get); |
| 683 | } |
| 684 | |
| 685 | if (get_buf[get_buf_cnt] == '\0') { |
Jason Wessel | 974460c | 2008-03-20 13:43:44 -0500 | [diff] [blame] | 686 | eprintk("kgdbts: ERROR GET: EOB on '%s' at %i\n", |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 687 | ts.name, ts.idx); |
| 688 | get_buf_cnt = 0; |
| 689 | fill_get_buf("D"); |
| 690 | } |
| 691 | ret = get_buf[get_buf_cnt]; |
| 692 | get_buf_cnt++; |
| 693 | return ret; |
| 694 | } |
| 695 | |
| 696 | /* This callback is a put char which is when kgdb sends data to |
| 697 | * this I/O module. |
| 698 | */ |
| 699 | if (ts.tst[ts.idx].get[0] == '\0' && |
| 700 | ts.tst[ts.idx].put[0] == '\0') { |
Jason Wessel | 974460c | 2008-03-20 13:43:44 -0500 | [diff] [blame] | 701 | eprintk("kgdbts: ERROR: beyond end of test on" |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 702 | " '%s' line %i\n", ts.name, ts.idx); |
| 703 | return 0; |
| 704 | } |
| 705 | |
| 706 | if (put_buf_cnt >= BUFMAX) { |
Jason Wessel | 974460c | 2008-03-20 13:43:44 -0500 | [diff] [blame] | 707 | eprintk("kgdbts: ERROR: put buffer overflow on" |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 708 | " '%s' line %i\n", ts.name, ts.idx); |
| 709 | put_buf_cnt = 0; |
| 710 | return 0; |
| 711 | } |
| 712 | /* Ignore everything until the first valid packet start '$' */ |
| 713 | if (put_buf_cnt == 0 && chr != '$') |
| 714 | return 0; |
| 715 | |
| 716 | put_buf[put_buf_cnt] = chr; |
| 717 | put_buf_cnt++; |
| 718 | |
| 719 | /* End of packet == #XX so look for the '#' */ |
| 720 | if (put_buf_cnt > 3 && put_buf[put_buf_cnt - 3] == '#') { |
Roel Kluin | b4f1b67 | 2009-12-11 08:43:15 -0600 | [diff] [blame] | 721 | if (put_buf_cnt >= BUFMAX) { |
| 722 | eprintk("kgdbts: ERROR: put buffer overflow on" |
| 723 | " '%s' line %i\n", ts.name, ts.idx); |
| 724 | put_buf_cnt = 0; |
| 725 | return 0; |
| 726 | } |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 727 | put_buf[put_buf_cnt] = '\0'; |
| 728 | v2printk("put%i: %s\n", ts.idx, put_buf); |
| 729 | /* Trigger check here */ |
| 730 | if (ts.validate_put && ts.validate_put(put_buf)) { |
Jason Wessel | 974460c | 2008-03-20 13:43:44 -0500 | [diff] [blame] | 731 | eprintk("kgdbts: ERROR PUT: end of test " |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 732 | "buffer on '%s' line %i expected %s got %s\n", |
| 733 | ts.name, ts.idx, ts.tst[ts.idx].put, put_buf); |
| 734 | } |
| 735 | ts.idx++; |
| 736 | put_buf_cnt = 0; |
| 737 | get_buf_cnt = 0; |
| 738 | send_ack = 1; |
| 739 | } |
| 740 | return 0; |
| 741 | } |
| 742 | |
| 743 | static void init_simple_test(void) |
| 744 | { |
| 745 | memset(&ts, 0, sizeof(ts)); |
| 746 | ts.run_test = run_simple_test; |
| 747 | ts.validate_put = validate_simple_test; |
| 748 | } |
| 749 | |
| 750 | static void run_plant_and_detach_test(int is_early) |
| 751 | { |
| 752 | char before[BREAK_INSTR_SIZE]; |
| 753 | char after[BREAK_INSTR_SIZE]; |
| 754 | |
| 755 | probe_kernel_read(before, (char *)kgdbts_break_test, |
| 756 | BREAK_INSTR_SIZE); |
| 757 | init_simple_test(); |
| 758 | ts.tst = plant_and_detach_test; |
| 759 | ts.name = "plant_and_detach_test"; |
| 760 | /* Activate test with initial breakpoint */ |
| 761 | if (!is_early) |
| 762 | kgdb_breakpoint(); |
| 763 | probe_kernel_read(after, (char *)kgdbts_break_test, |
| 764 | BREAK_INSTR_SIZE); |
| 765 | if (memcmp(before, after, BREAK_INSTR_SIZE)) { |
| 766 | printk(KERN_CRIT "kgdbts: ERROR kgdb corrupted memory\n"); |
| 767 | panic("kgdb memory corruption"); |
| 768 | } |
| 769 | |
| 770 | /* complete the detach test */ |
| 771 | if (!is_early) |
| 772 | kgdbts_break_test(); |
| 773 | } |
| 774 | |
| 775 | static void run_breakpoint_test(int is_hw_breakpoint) |
| 776 | { |
| 777 | test_complete = 0; |
| 778 | init_simple_test(); |
| 779 | if (is_hw_breakpoint) { |
| 780 | ts.tst = hw_breakpoint_test; |
| 781 | ts.name = "hw_breakpoint_test"; |
| 782 | } else { |
| 783 | ts.tst = sw_breakpoint_test; |
| 784 | ts.name = "sw_breakpoint_test"; |
| 785 | } |
| 786 | /* Activate test with initial breakpoint */ |
| 787 | kgdb_breakpoint(); |
| 788 | /* run code with the break point in it */ |
| 789 | kgdbts_break_test(); |
| 790 | kgdb_breakpoint(); |
| 791 | |
| 792 | if (test_complete) |
| 793 | return; |
| 794 | |
Jason Wessel | 974460c | 2008-03-20 13:43:44 -0500 | [diff] [blame] | 795 | eprintk("kgdbts: ERROR %s test failed\n", ts.name); |
Jason Wessel | b33cb81 | 2008-05-28 12:49:57 -0500 | [diff] [blame] | 796 | if (is_hw_breakpoint) |
| 797 | hwbreaks_ok = 0; |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 798 | } |
| 799 | |
| 800 | static void run_hw_break_test(int is_write_test) |
| 801 | { |
| 802 | test_complete = 0; |
| 803 | init_simple_test(); |
| 804 | if (is_write_test) { |
| 805 | ts.tst = hw_write_break_test; |
| 806 | ts.name = "hw_write_break_test"; |
| 807 | } else { |
| 808 | ts.tst = hw_access_break_test; |
| 809 | ts.name = "hw_access_break_test"; |
| 810 | } |
| 811 | /* Activate test with initial breakpoint */ |
| 812 | kgdb_breakpoint(); |
| 813 | hw_break_val_access(); |
| 814 | if (is_write_test) { |
Jason Wessel | b33cb81 | 2008-05-28 12:49:57 -0500 | [diff] [blame] | 815 | if (test_complete == 2) { |
Jason Wessel | 974460c | 2008-03-20 13:43:44 -0500 | [diff] [blame] | 816 | eprintk("kgdbts: ERROR %s broke on access\n", |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 817 | ts.name); |
Jason Wessel | b33cb81 | 2008-05-28 12:49:57 -0500 | [diff] [blame] | 818 | hwbreaks_ok = 0; |
| 819 | } |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 820 | hw_break_val_write(); |
| 821 | } |
| 822 | kgdb_breakpoint(); |
| 823 | |
| 824 | if (test_complete == 1) |
| 825 | return; |
| 826 | |
Jason Wessel | 974460c | 2008-03-20 13:43:44 -0500 | [diff] [blame] | 827 | eprintk("kgdbts: ERROR %s test failed\n", ts.name); |
Jason Wessel | b33cb81 | 2008-05-28 12:49:57 -0500 | [diff] [blame] | 828 | hwbreaks_ok = 0; |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 829 | } |
| 830 | |
| 831 | static void run_nmi_sleep_test(int nmi_sleep) |
| 832 | { |
| 833 | unsigned long flags; |
| 834 | |
| 835 | init_simple_test(); |
| 836 | ts.tst = nmi_sleep_test; |
| 837 | ts.name = "nmi_sleep_test"; |
| 838 | /* Activate test with initial breakpoint */ |
| 839 | kgdb_breakpoint(); |
| 840 | local_irq_save(flags); |
| 841 | mdelay(nmi_sleep*1000); |
| 842 | touch_nmi_watchdog(); |
| 843 | local_irq_restore(flags); |
| 844 | if (test_complete != 2) |
Jason Wessel | 974460c | 2008-03-20 13:43:44 -0500 | [diff] [blame] | 845 | eprintk("kgdbts: ERROR nmi_test did not hit nmi\n"); |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 846 | kgdb_breakpoint(); |
| 847 | if (test_complete == 1) |
| 848 | return; |
| 849 | |
Jason Wessel | 974460c | 2008-03-20 13:43:44 -0500 | [diff] [blame] | 850 | eprintk("kgdbts: ERROR %s test failed\n", ts.name); |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 851 | } |
| 852 | |
| 853 | static void run_bad_read_test(void) |
| 854 | { |
| 855 | init_simple_test(); |
| 856 | ts.tst = bad_read_test; |
| 857 | ts.name = "bad_read_test"; |
| 858 | /* Activate test with initial breakpoint */ |
| 859 | kgdb_breakpoint(); |
| 860 | } |
| 861 | |
| 862 | static void run_do_fork_test(void) |
| 863 | { |
| 864 | init_simple_test(); |
| 865 | ts.tst = do_fork_test; |
| 866 | ts.name = "do_fork_test"; |
| 867 | /* Activate test with initial breakpoint */ |
| 868 | kgdb_breakpoint(); |
| 869 | } |
| 870 | |
| 871 | static void run_sys_open_test(void) |
| 872 | { |
| 873 | init_simple_test(); |
| 874 | ts.tst = sys_open_test; |
| 875 | ts.name = "sys_open_test"; |
| 876 | /* Activate test with initial breakpoint */ |
| 877 | kgdb_breakpoint(); |
| 878 | } |
| 879 | |
| 880 | static void run_singlestep_break_test(void) |
| 881 | { |
| 882 | init_simple_test(); |
| 883 | ts.tst = singlestep_break_test; |
| 884 | ts.name = "singlestep_breakpoint_test"; |
| 885 | /* Activate test with initial breakpoint */ |
| 886 | kgdb_breakpoint(); |
| 887 | kgdbts_break_test(); |
| 888 | kgdbts_break_test(); |
| 889 | } |
| 890 | |
| 891 | static void kgdbts_run_tests(void) |
| 892 | { |
| 893 | char *ptr; |
| 894 | int fork_test = 0; |
Harvey Harrison | 001fddf | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 895 | int do_sys_open_test = 0; |
Jason Wessel | 7cfcd985 | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 896 | int sstep_test = 1000; |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 897 | int nmi_sleep = 0; |
Jason Wessel | 7cfcd985 | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 898 | int i; |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 899 | |
Geert Uytterhoeven | 59d309f | 2009-12-11 08:43:15 -0600 | [diff] [blame] | 900 | ptr = strchr(config, 'F'); |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 901 | if (ptr) |
Harvey Harrison | 001fddf | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 902 | fork_test = simple_strtol(ptr + 1, NULL, 10); |
Geert Uytterhoeven | 59d309f | 2009-12-11 08:43:15 -0600 | [diff] [blame] | 903 | ptr = strchr(config, 'S'); |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 904 | if (ptr) |
Harvey Harrison | 001fddf | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 905 | do_sys_open_test = simple_strtol(ptr + 1, NULL, 10); |
Geert Uytterhoeven | 59d309f | 2009-12-11 08:43:15 -0600 | [diff] [blame] | 906 | ptr = strchr(config, 'N'); |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 907 | if (ptr) |
| 908 | nmi_sleep = simple_strtol(ptr+1, NULL, 10); |
Geert Uytterhoeven | 59d309f | 2009-12-11 08:43:15 -0600 | [diff] [blame] | 909 | ptr = strchr(config, 'I'); |
Jason Wessel | 7cfcd985 | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 910 | if (ptr) |
| 911 | sstep_test = simple_strtol(ptr+1, NULL, 10); |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 912 | |
| 913 | /* required internal KGDB tests */ |
| 914 | v1printk("kgdbts:RUN plant and detach test\n"); |
| 915 | run_plant_and_detach_test(0); |
| 916 | v1printk("kgdbts:RUN sw breakpoint test\n"); |
| 917 | run_breakpoint_test(0); |
| 918 | v1printk("kgdbts:RUN bad memory access test\n"); |
| 919 | run_bad_read_test(); |
Jason Wessel | 7cfcd985 | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 920 | v1printk("kgdbts:RUN singlestep test %i iterations\n", sstep_test); |
| 921 | for (i = 0; i < sstep_test; i++) { |
| 922 | run_singlestep_break_test(); |
| 923 | if (i % 100 == 0) |
| 924 | v1printk("kgdbts:RUN singlestep [%i/%i]\n", |
| 925 | i, sstep_test); |
| 926 | } |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 927 | |
| 928 | /* ===Optional tests=== */ |
| 929 | |
| 930 | /* All HW break point tests */ |
| 931 | if (arch_kgdb_ops.flags & KGDB_HW_BREAKPOINT) { |
Jason Wessel | b33cb81 | 2008-05-28 12:49:57 -0500 | [diff] [blame] | 932 | hwbreaks_ok = 1; |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 933 | v1printk("kgdbts:RUN hw breakpoint test\n"); |
| 934 | run_breakpoint_test(1); |
| 935 | v1printk("kgdbts:RUN hw write breakpoint test\n"); |
| 936 | run_hw_break_test(1); |
| 937 | v1printk("kgdbts:RUN access write breakpoint test\n"); |
| 938 | run_hw_break_test(0); |
| 939 | } |
| 940 | |
| 941 | if (nmi_sleep) { |
| 942 | v1printk("kgdbts:RUN NMI sleep %i seconds test\n", nmi_sleep); |
| 943 | run_nmi_sleep_test(nmi_sleep); |
| 944 | } |
| 945 | |
Jason Wessel | b33cb81 | 2008-05-28 12:49:57 -0500 | [diff] [blame] | 946 | #ifdef CONFIG_DEBUG_RODATA |
| 947 | /* Until there is an api to write to read-only text segments, use |
| 948 | * HW breakpoints for the remainder of any tests, else print a |
| 949 | * failure message if hw breakpoints do not work. |
| 950 | */ |
| 951 | if (!(arch_kgdb_ops.flags & KGDB_HW_BREAKPOINT && hwbreaks_ok)) { |
| 952 | eprintk("kgdbts: HW breakpoints do not work," |
| 953 | "skipping remaining tests\n"); |
| 954 | return; |
| 955 | } |
| 956 | force_hwbrks = 1; |
| 957 | #endif /* CONFIG_DEBUG_RODATA */ |
| 958 | |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 959 | /* If the do_fork test is run it will be the last test that is |
| 960 | * executed because a kernel thread will be spawned at the very |
| 961 | * end to unregister the debug hooks. |
| 962 | */ |
| 963 | if (fork_test) { |
| 964 | repeat_test = fork_test; |
| 965 | printk(KERN_INFO "kgdbts:RUN do_fork for %i breakpoints\n", |
| 966 | repeat_test); |
Harvey Harrison | 001fddf | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 967 | kthread_run(kgdbts_unreg_thread, NULL, "kgdbts_unreg"); |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 968 | run_do_fork_test(); |
| 969 | return; |
| 970 | } |
| 971 | |
| 972 | /* If the sys_open test is run it will be the last test that is |
| 973 | * executed because a kernel thread will be spawned at the very |
| 974 | * end to unregister the debug hooks. |
| 975 | */ |
Harvey Harrison | 001fddf | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 976 | if (do_sys_open_test) { |
| 977 | repeat_test = do_sys_open_test; |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 978 | printk(KERN_INFO "kgdbts:RUN sys_open for %i breakpoints\n", |
| 979 | repeat_test); |
Harvey Harrison | 001fddf | 2008-04-24 16:57:23 -0500 | [diff] [blame] | 980 | kthread_run(kgdbts_unreg_thread, NULL, "kgdbts_unreg"); |
Jason Wessel | e8d31c2 | 2008-03-07 16:34:17 -0600 | [diff] [blame] | 981 | run_sys_open_test(); |
| 982 | return; |
| 983 | } |
| 984 | /* Shutdown and unregister */ |
| 985 | kgdb_unregister_io_module(&kgdbts_io_ops); |
| 986 | configured = 0; |
| 987 | } |
| 988 | |
| 989 | static int kgdbts_option_setup(char *opt) |
| 990 | { |
| 991 | if (strlen(opt) > MAX_CONFIG_LEN) { |
| 992 | printk(KERN_ERR "kgdbts: config string too long\n"); |
| 993 | return -ENOSPC; |
| 994 | } |
| 995 | strcpy(config, opt); |
| 996 | |
| 997 | verbose = 0; |
| 998 | if (strstr(config, "V1")) |
| 999 | verbose = 1; |
| 1000 | if (strstr(config, "V2")) |
| 1001 | verbose = 2; |
| 1002 | |
| 1003 | return 0; |
| 1004 | } |
| 1005 | |
| 1006 | __setup("kgdbts=", kgdbts_option_setup); |
| 1007 | |
| 1008 | static int configure_kgdbts(void) |
| 1009 | { |
| 1010 | int err = 0; |
| 1011 | |
| 1012 | if (!strlen(config) || isspace(config[0])) |
| 1013 | goto noconfig; |
| 1014 | err = kgdbts_option_setup(config); |
| 1015 | if (err) |
| 1016 | goto noconfig; |
| 1017 | |
| 1018 | final_ack = 0; |
| 1019 | run_plant_and_detach_test(1); |
| 1020 | |
| 1021 | err = kgdb_register_io_module(&kgdbts_io_ops); |
| 1022 | if (err) { |
| 1023 | configured = 0; |
| 1024 | return err; |
| 1025 | } |
| 1026 | configured = 1; |
| 1027 | kgdbts_run_tests(); |
| 1028 | |
| 1029 | return err; |
| 1030 | |
| 1031 | noconfig: |
| 1032 | config[0] = 0; |
| 1033 | configured = 0; |
| 1034 | |
| 1035 | return err; |
| 1036 | } |
| 1037 | |
| 1038 | static int __init init_kgdbts(void) |
| 1039 | { |
| 1040 | /* Already configured? */ |
| 1041 | if (configured == 1) |
| 1042 | return 0; |
| 1043 | |
| 1044 | return configure_kgdbts(); |
| 1045 | } |
| 1046 | |
| 1047 | static void cleanup_kgdbts(void) |
| 1048 | { |
| 1049 | if (configured == 1) |
| 1050 | kgdb_unregister_io_module(&kgdbts_io_ops); |
| 1051 | } |
| 1052 | |
| 1053 | static int kgdbts_get_char(void) |
| 1054 | { |
| 1055 | int val = 0; |
| 1056 | |
| 1057 | if (ts.run_test) |
| 1058 | val = ts.run_test(1, 0); |
| 1059 | |
| 1060 | return val; |
| 1061 | } |
| 1062 | |
| 1063 | static void kgdbts_put_char(u8 chr) |
| 1064 | { |
| 1065 | if (ts.run_test) |
| 1066 | ts.run_test(0, chr); |
| 1067 | } |
| 1068 | |
| 1069 | static int param_set_kgdbts_var(const char *kmessage, struct kernel_param *kp) |
| 1070 | { |
| 1071 | int len = strlen(kmessage); |
| 1072 | |
| 1073 | if (len >= MAX_CONFIG_LEN) { |
| 1074 | printk(KERN_ERR "kgdbts: config string too long\n"); |
| 1075 | return -ENOSPC; |
| 1076 | } |
| 1077 | |
| 1078 | /* Only copy in the string if the init function has not run yet */ |
| 1079 | if (configured < 0) { |
| 1080 | strcpy(config, kmessage); |
| 1081 | return 0; |
| 1082 | } |
| 1083 | |
| 1084 | if (kgdb_connected) { |
| 1085 | printk(KERN_ERR |
| 1086 | "kgdbts: Cannot reconfigure while KGDB is connected.\n"); |
| 1087 | |
| 1088 | return -EBUSY; |
| 1089 | } |
| 1090 | |
| 1091 | strcpy(config, kmessage); |
| 1092 | /* Chop out \n char as a result of echo */ |
| 1093 | if (config[len - 1] == '\n') |
| 1094 | config[len - 1] = '\0'; |
| 1095 | |
| 1096 | if (configured == 1) |
| 1097 | cleanup_kgdbts(); |
| 1098 | |
| 1099 | /* Go and configure with the new params. */ |
| 1100 | return configure_kgdbts(); |
| 1101 | } |
| 1102 | |
| 1103 | static void kgdbts_pre_exp_handler(void) |
| 1104 | { |
| 1105 | /* Increment the module count when the debugger is active */ |
| 1106 | if (!kgdb_connected) |
| 1107 | try_module_get(THIS_MODULE); |
| 1108 | } |
| 1109 | |
| 1110 | static void kgdbts_post_exp_handler(void) |
| 1111 | { |
| 1112 | /* decrement the module count when the debugger detaches */ |
| 1113 | if (!kgdb_connected) |
| 1114 | module_put(THIS_MODULE); |
| 1115 | } |
| 1116 | |
| 1117 | static struct kgdb_io kgdbts_io_ops = { |
| 1118 | .name = "kgdbts", |
| 1119 | .read_char = kgdbts_get_char, |
| 1120 | .write_char = kgdbts_put_char, |
| 1121 | .pre_exception = kgdbts_pre_exp_handler, |
| 1122 | .post_exception = kgdbts_post_exp_handler, |
| 1123 | }; |
| 1124 | |
| 1125 | module_init(init_kgdbts); |
| 1126 | module_exit(cleanup_kgdbts); |
| 1127 | module_param_call(kgdbts, param_set_kgdbts_var, param_get_string, &kps, 0644); |
| 1128 | MODULE_PARM_DESC(kgdbts, "<A|V1|V2>[F#|S#][N#]"); |
| 1129 | MODULE_DESCRIPTION("KGDB Test Suite"); |
| 1130 | MODULE_LICENSE("GPL"); |
| 1131 | MODULE_AUTHOR("Wind River Systems, Inc."); |
| 1132 | |