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e8d31c20 JW |
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 | |
7cfcd985 | 50 | * I## = Run the single step test ## iterations |
e8d31c20 JW |
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> | |
eb12a679 | 105 | #include <linux/module.h> |
e8d31c20 JW |
106 | |
107 | #define v1printk(a...) do { \ | |
108 | if (verbose) \ | |
109 | printk(KERN_INFO a); \ | |
110 | } while (0) | |
111 | #define v2printk(a...) do { \ | |
112 | if (verbose > 1) \ | |
113 | printk(KERN_INFO a); \ | |
114 | touch_nmi_watchdog(); \ | |
115 | } while (0) | |
974460c5 JW |
116 | #define eprintk(a...) do { \ |
117 | printk(KERN_ERR a); \ | |
118 | WARN_ON(1); \ | |
119 | } while (0) | |
e8d31c20 JW |
120 | #define MAX_CONFIG_LEN 40 |
121 | ||
e8d31c20 JW |
122 | static struct kgdb_io kgdbts_io_ops; |
123 | static char get_buf[BUFMAX]; | |
124 | static int get_buf_cnt; | |
125 | static char put_buf[BUFMAX]; | |
126 | static int put_buf_cnt; | |
127 | static char scratch_buf[BUFMAX]; | |
128 | static int verbose; | |
129 | static int repeat_test; | |
130 | static int test_complete; | |
131 | static int send_ack; | |
132 | static int final_ack; | |
b33cb815 JW |
133 | static int force_hwbrks; |
134 | static int hwbreaks_ok; | |
e8d31c20 JW |
135 | static int hw_break_val; |
136 | static int hw_break_val2; | |
486c5987 JW |
137 | static int cont_instead_of_sstep; |
138 | static unsigned long cont_thread_id; | |
139 | static unsigned long sstep_thread_id; | |
4d7ffa49 | 140 | #if defined(CONFIG_ARM) || defined(CONFIG_MIPS) || defined(CONFIG_SPARC) |
e8d31c20 JW |
141 | static int arch_needs_sstep_emulation = 1; |
142 | #else | |
143 | static int arch_needs_sstep_emulation; | |
144 | #endif | |
23bbd8e3 | 145 | static unsigned long cont_addr; |
e8d31c20 | 146 | static unsigned long sstep_addr; |
23bbd8e3 | 147 | static int restart_from_top_after_write; |
e8d31c20 JW |
148 | static int sstep_state; |
149 | ||
150 | /* Storage for the registers, in GDB format. */ | |
151 | static unsigned long kgdbts_gdb_regs[(NUMREGBYTES + | |
152 | sizeof(unsigned long) - 1) / | |
153 | sizeof(unsigned long)]; | |
154 | static struct pt_regs kgdbts_regs; | |
155 | ||
156 | /* -1 = init not run yet, 0 = unconfigured, 1 = configured. */ | |
157 | static int configured = -1; | |
158 | ||
974460c5 JW |
159 | #ifdef CONFIG_KGDB_TESTS_BOOT_STRING |
160 | static char config[MAX_CONFIG_LEN] = CONFIG_KGDB_TESTS_BOOT_STRING; | |
161 | #else | |
e8d31c20 | 162 | static char config[MAX_CONFIG_LEN]; |
974460c5 | 163 | #endif |
e8d31c20 JW |
164 | static struct kparam_string kps = { |
165 | .string = config, | |
166 | .maxlen = MAX_CONFIG_LEN, | |
167 | }; | |
168 | ||
169 | static void fill_get_buf(char *buf); | |
170 | ||
171 | struct test_struct { | |
172 | char *get; | |
173 | char *put; | |
174 | void (*get_handler)(char *); | |
175 | int (*put_handler)(char *, char *); | |
176 | }; | |
177 | ||
178 | struct test_state { | |
179 | char *name; | |
180 | struct test_struct *tst; | |
181 | int idx; | |
182 | int (*run_test) (int, int); | |
183 | int (*validate_put) (char *); | |
184 | }; | |
185 | ||
186 | static struct test_state ts; | |
187 | ||
188 | static int kgdbts_unreg_thread(void *ptr) | |
189 | { | |
190 | /* Wait until the tests are complete and then ungresiter the I/O | |
191 | * driver. | |
192 | */ | |
193 | while (!final_ack) | |
194 | msleep_interruptible(1500); | |
23bbd8e3 JW |
195 | /* Pause for any other threads to exit after final ack. */ |
196 | msleep_interruptible(1000); | |
e8d31c20 JW |
197 | if (configured) |
198 | kgdb_unregister_io_module(&kgdbts_io_ops); | |
199 | configured = 0; | |
200 | ||
201 | return 0; | |
202 | } | |
203 | ||
204 | /* This is noinline such that it can be used for a single location to | |
205 | * place a breakpoint | |
206 | */ | |
207 | static noinline void kgdbts_break_test(void) | |
208 | { | |
209 | v2printk("kgdbts: breakpoint complete\n"); | |
210 | } | |
211 | ||
212 | /* Lookup symbol info in the kernel */ | |
213 | static unsigned long lookup_addr(char *arg) | |
214 | { | |
215 | unsigned long addr = 0; | |
216 | ||
217 | if (!strcmp(arg, "kgdbts_break_test")) | |
218 | addr = (unsigned long)kgdbts_break_test; | |
219 | else if (!strcmp(arg, "sys_open")) | |
486c5987 | 220 | addr = (unsigned long)do_sys_open; |
e8d31c20 JW |
221 | else if (!strcmp(arg, "do_fork")) |
222 | addr = (unsigned long)do_fork; | |
223 | else if (!strcmp(arg, "hw_break_val")) | |
224 | addr = (unsigned long)&hw_break_val; | |
225 | return addr; | |
226 | } | |
227 | ||
228 | static void break_helper(char *bp_type, char *arg, unsigned long vaddr) | |
229 | { | |
230 | unsigned long addr; | |
231 | ||
232 | if (arg) | |
233 | addr = lookup_addr(arg); | |
234 | else | |
235 | addr = vaddr; | |
236 | ||
237 | sprintf(scratch_buf, "%s,%lx,%i", bp_type, addr, | |
238 | BREAK_INSTR_SIZE); | |
239 | fill_get_buf(scratch_buf); | |
240 | } | |
241 | ||
242 | static void sw_break(char *arg) | |
243 | { | |
b33cb815 | 244 | break_helper(force_hwbrks ? "Z1" : "Z0", arg, 0); |
e8d31c20 JW |
245 | } |
246 | ||
247 | static void sw_rem_break(char *arg) | |
248 | { | |
b33cb815 | 249 | break_helper(force_hwbrks ? "z1" : "z0", arg, 0); |
e8d31c20 JW |
250 | } |
251 | ||
252 | static void hw_break(char *arg) | |
253 | { | |
254 | break_helper("Z1", arg, 0); | |
255 | } | |
256 | ||
257 | static void hw_rem_break(char *arg) | |
258 | { | |
259 | break_helper("z1", arg, 0); | |
260 | } | |
261 | ||
262 | static void hw_write_break(char *arg) | |
263 | { | |
264 | break_helper("Z2", arg, 0); | |
265 | } | |
266 | ||
267 | static void hw_rem_write_break(char *arg) | |
268 | { | |
269 | break_helper("z2", arg, 0); | |
270 | } | |
271 | ||
272 | static void hw_access_break(char *arg) | |
273 | { | |
274 | break_helper("Z4", arg, 0); | |
275 | } | |
276 | ||
277 | static void hw_rem_access_break(char *arg) | |
278 | { | |
279 | break_helper("z4", arg, 0); | |
280 | } | |
281 | ||
282 | static void hw_break_val_access(void) | |
283 | { | |
284 | hw_break_val2 = hw_break_val; | |
285 | } | |
286 | ||
287 | static void hw_break_val_write(void) | |
288 | { | |
289 | hw_break_val++; | |
290 | } | |
291 | ||
486c5987 JW |
292 | static int get_thread_id_continue(char *put_str, char *arg) |
293 | { | |
294 | char *ptr = &put_str[11]; | |
295 | ||
296 | if (put_str[1] != 'T' || put_str[2] != '0') | |
297 | return 1; | |
298 | kgdb_hex2long(&ptr, &cont_thread_id); | |
299 | return 0; | |
300 | } | |
301 | ||
e8d31c20 JW |
302 | static int check_and_rewind_pc(char *put_str, char *arg) |
303 | { | |
304 | unsigned long addr = lookup_addr(arg); | |
63ab25eb | 305 | unsigned long ip; |
e8d31c20 JW |
306 | int offset = 0; |
307 | ||
308 | kgdb_hex2mem(&put_str[1], (char *)kgdbts_gdb_regs, | |
309 | NUMREGBYTES); | |
310 | gdb_regs_to_pt_regs(kgdbts_gdb_regs, &kgdbts_regs); | |
63ab25eb MF |
311 | ip = instruction_pointer(&kgdbts_regs); |
312 | v2printk("Stopped at IP: %lx\n", ip); | |
313 | #ifdef GDB_ADJUSTS_BREAK_OFFSET | |
314 | /* On some arches, a breakpoint stop requires it to be decremented */ | |
315 | if (addr + BREAK_INSTR_SIZE == ip) | |
316 | offset = -BREAK_INSTR_SIZE; | |
e8d31c20 | 317 | #endif |
23bbd8e3 JW |
318 | |
319 | if (arch_needs_sstep_emulation && sstep_addr && | |
320 | ip + offset == sstep_addr && | |
321 | ((!strcmp(arg, "sys_open") || !strcmp(arg, "do_fork")))) { | |
322 | /* This is special case for emulated single step */ | |
323 | v2printk("Emul: rewind hit single step bp\n"); | |
324 | restart_from_top_after_write = 1; | |
325 | } else if (strcmp(arg, "silent") && ip + offset != addr) { | |
974460c5 | 326 | eprintk("kgdbts: BP mismatch %lx expected %lx\n", |
63ab25eb | 327 | ip + offset, addr); |
e8d31c20 JW |
328 | return 1; |
329 | } | |
63ab25eb | 330 | /* Readjust the instruction pointer if needed */ |
603d04b2 | 331 | ip += offset; |
23bbd8e3 | 332 | cont_addr = ip; |
603d04b2 MF |
333 | #ifdef GDB_ADJUSTS_BREAK_OFFSET |
334 | instruction_pointer_set(&kgdbts_regs, ip); | |
335 | #endif | |
e8d31c20 JW |
336 | return 0; |
337 | } | |
338 | ||
339 | static int check_single_step(char *put_str, char *arg) | |
340 | { | |
341 | unsigned long addr = lookup_addr(arg); | |
23bbd8e3 JW |
342 | static int matched_id; |
343 | ||
e8d31c20 JW |
344 | /* |
345 | * From an arch indepent point of view the instruction pointer | |
346 | * should be on a different instruction | |
347 | */ | |
348 | kgdb_hex2mem(&put_str[1], (char *)kgdbts_gdb_regs, | |
349 | NUMREGBYTES); | |
350 | gdb_regs_to_pt_regs(kgdbts_gdb_regs, &kgdbts_regs); | |
351 | v2printk("Singlestep stopped at IP: %lx\n", | |
352 | instruction_pointer(&kgdbts_regs)); | |
486c5987 | 353 | |
23bbd8e3 | 354 | if (sstep_thread_id != cont_thread_id) { |
486c5987 JW |
355 | /* |
356 | * Ensure we stopped in the same thread id as before, else the | |
357 | * debugger should continue until the original thread that was | |
358 | * single stepped is scheduled again, emulating gdb's behavior. | |
359 | */ | |
360 | v2printk("ThrID does not match: %lx\n", cont_thread_id); | |
23bbd8e3 JW |
361 | if (arch_needs_sstep_emulation) { |
362 | if (matched_id && | |
363 | instruction_pointer(&kgdbts_regs) != addr) | |
364 | goto continue_test; | |
365 | matched_id++; | |
366 | ts.idx -= 2; | |
367 | sstep_state = 0; | |
368 | return 0; | |
369 | } | |
486c5987 JW |
370 | cont_instead_of_sstep = 1; |
371 | ts.idx -= 4; | |
372 | return 0; | |
373 | } | |
23bbd8e3 JW |
374 | continue_test: |
375 | matched_id = 0; | |
e8d31c20 | 376 | if (instruction_pointer(&kgdbts_regs) == addr) { |
974460c5 | 377 | eprintk("kgdbts: SingleStep failed at %lx\n", |
e8d31c20 JW |
378 | instruction_pointer(&kgdbts_regs)); |
379 | return 1; | |
380 | } | |
381 | ||
382 | return 0; | |
383 | } | |
384 | ||
385 | static void write_regs(char *arg) | |
386 | { | |
387 | memset(scratch_buf, 0, sizeof(scratch_buf)); | |
388 | scratch_buf[0] = 'G'; | |
389 | pt_regs_to_gdb_regs(kgdbts_gdb_regs, &kgdbts_regs); | |
390 | kgdb_mem2hex((char *)kgdbts_gdb_regs, &scratch_buf[1], NUMREGBYTES); | |
391 | fill_get_buf(scratch_buf); | |
392 | } | |
393 | ||
394 | static void skip_back_repeat_test(char *arg) | |
395 | { | |
396 | int go_back = simple_strtol(arg, NULL, 10); | |
397 | ||
398 | repeat_test--; | |
399 | if (repeat_test <= 0) | |
400 | ts.idx++; | |
401 | else | |
402 | ts.idx -= go_back; | |
403 | fill_get_buf(ts.tst[ts.idx].get); | |
404 | } | |
405 | ||
406 | static int got_break(char *put_str, char *arg) | |
407 | { | |
408 | test_complete = 1; | |
409 | if (!strncmp(put_str+1, arg, 2)) { | |
410 | if (!strncmp(arg, "T0", 2)) | |
411 | test_complete = 2; | |
412 | return 0; | |
413 | } | |
414 | return 1; | |
415 | } | |
416 | ||
23bbd8e3 JW |
417 | static void get_cont_catch(char *arg) |
418 | { | |
419 | /* Always send detach because the test is completed at this point */ | |
420 | fill_get_buf("D"); | |
421 | } | |
422 | ||
423 | static int put_cont_catch(char *put_str, char *arg) | |
424 | { | |
425 | /* This is at the end of the test and we catch any and all input */ | |
426 | v2printk("kgdbts: cleanup task: %lx\n", sstep_thread_id); | |
427 | ts.idx--; | |
428 | return 0; | |
429 | } | |
430 | ||
431 | static int emul_reset(char *put_str, char *arg) | |
432 | { | |
433 | if (strncmp(put_str, "$OK", 3)) | |
434 | return 1; | |
435 | if (restart_from_top_after_write) { | |
436 | restart_from_top_after_write = 0; | |
437 | ts.idx = -1; | |
438 | } | |
439 | return 0; | |
440 | } | |
441 | ||
e8d31c20 JW |
442 | static void emul_sstep_get(char *arg) |
443 | { | |
444 | if (!arch_needs_sstep_emulation) { | |
486c5987 JW |
445 | if (cont_instead_of_sstep) { |
446 | cont_instead_of_sstep = 0; | |
447 | fill_get_buf("c"); | |
448 | } else { | |
449 | fill_get_buf(arg); | |
450 | } | |
e8d31c20 JW |
451 | return; |
452 | } | |
453 | switch (sstep_state) { | |
454 | case 0: | |
455 | v2printk("Emulate single step\n"); | |
456 | /* Start by looking at the current PC */ | |
457 | fill_get_buf("g"); | |
458 | break; | |
459 | case 1: | |
460 | /* set breakpoint */ | |
001fddf5 | 461 | break_helper("Z0", NULL, sstep_addr); |
e8d31c20 JW |
462 | break; |
463 | case 2: | |
464 | /* Continue */ | |
465 | fill_get_buf("c"); | |
466 | break; | |
467 | case 3: | |
468 | /* Clear breakpoint */ | |
001fddf5 | 469 | break_helper("z0", NULL, sstep_addr); |
e8d31c20 JW |
470 | break; |
471 | default: | |
974460c5 | 472 | eprintk("kgdbts: ERROR failed sstep get emulation\n"); |
e8d31c20 JW |
473 | } |
474 | sstep_state++; | |
475 | } | |
476 | ||
477 | static int emul_sstep_put(char *put_str, char *arg) | |
478 | { | |
479 | if (!arch_needs_sstep_emulation) { | |
486c5987 JW |
480 | char *ptr = &put_str[11]; |
481 | if (put_str[1] != 'T' || put_str[2] != '0') | |
482 | return 1; | |
483 | kgdb_hex2long(&ptr, &sstep_thread_id); | |
484 | return 0; | |
e8d31c20 JW |
485 | } |
486 | switch (sstep_state) { | |
487 | case 1: | |
488 | /* validate the "g" packet to get the IP */ | |
489 | kgdb_hex2mem(&put_str[1], (char *)kgdbts_gdb_regs, | |
490 | NUMREGBYTES); | |
491 | gdb_regs_to_pt_regs(kgdbts_gdb_regs, &kgdbts_regs); | |
492 | v2printk("Stopped at IP: %lx\n", | |
493 | instruction_pointer(&kgdbts_regs)); | |
494 | /* Want to stop at IP + break instruction size by default */ | |
23bbd8e3 | 495 | sstep_addr = cont_addr + BREAK_INSTR_SIZE; |
e8d31c20 JW |
496 | break; |
497 | case 2: | |
498 | if (strncmp(put_str, "$OK", 3)) { | |
974460c5 | 499 | eprintk("kgdbts: failed sstep break set\n"); |
e8d31c20 JW |
500 | return 1; |
501 | } | |
502 | break; | |
503 | case 3: | |
504 | if (strncmp(put_str, "$T0", 3)) { | |
974460c5 | 505 | eprintk("kgdbts: failed continue sstep\n"); |
e8d31c20 | 506 | return 1; |
23bbd8e3 JW |
507 | } else { |
508 | char *ptr = &put_str[11]; | |
509 | kgdb_hex2long(&ptr, &sstep_thread_id); | |
e8d31c20 JW |
510 | } |
511 | break; | |
512 | case 4: | |
513 | if (strncmp(put_str, "$OK", 3)) { | |
974460c5 | 514 | eprintk("kgdbts: failed sstep break unset\n"); |
e8d31c20 JW |
515 | return 1; |
516 | } | |
517 | /* Single step is complete so continue on! */ | |
518 | sstep_state = 0; | |
519 | return 0; | |
520 | default: | |
974460c5 | 521 | eprintk("kgdbts: ERROR failed sstep put emulation\n"); |
e8d31c20 JW |
522 | } |
523 | ||
524 | /* Continue on the same test line until emulation is complete */ | |
525 | ts.idx--; | |
526 | return 0; | |
527 | } | |
528 | ||
529 | static int final_ack_set(char *put_str, char *arg) | |
530 | { | |
531 | if (strncmp(put_str+1, arg, 2)) | |
532 | return 1; | |
533 | final_ack = 1; | |
534 | return 0; | |
535 | } | |
536 | /* | |
537 | * Test to plant a breakpoint and detach, which should clear out the | |
538 | * breakpoint and restore the original instruction. | |
539 | */ | |
540 | static struct test_struct plant_and_detach_test[] = { | |
541 | { "?", "S0*" }, /* Clear break points */ | |
542 | { "kgdbts_break_test", "OK", sw_break, }, /* set sw breakpoint */ | |
543 | { "D", "OK" }, /* Detach */ | |
544 | { "", "" }, | |
545 | }; | |
546 | ||
547 | /* | |
548 | * Simple test to write in a software breakpoint, check for the | |
549 | * correct stop location and detach. | |
550 | */ | |
551 | static struct test_struct sw_breakpoint_test[] = { | |
552 | { "?", "S0*" }, /* Clear break points */ | |
553 | { "kgdbts_break_test", "OK", sw_break, }, /* set sw breakpoint */ | |
554 | { "c", "T0*", }, /* Continue */ | |
001fddf5 | 555 | { "g", "kgdbts_break_test", NULL, check_and_rewind_pc }, |
e8d31c20 JW |
556 | { "write", "OK", write_regs }, |
557 | { "kgdbts_break_test", "OK", sw_rem_break }, /*remove breakpoint */ | |
558 | { "D", "OK" }, /* Detach */ | |
001fddf5 | 559 | { "D", "OK", NULL, got_break }, /* On success we made it here */ |
e8d31c20 JW |
560 | { "", "" }, |
561 | }; | |
562 | ||
563 | /* | |
564 | * Test a known bad memory read location to test the fault handler and | |
565 | * read bytes 1-8 at the bad address | |
566 | */ | |
567 | static struct test_struct bad_read_test[] = { | |
568 | { "?", "S0*" }, /* Clear break points */ | |
569 | { "m0,1", "E*" }, /* read 1 byte at address 1 */ | |
570 | { "m0,2", "E*" }, /* read 1 byte at address 2 */ | |
571 | { "m0,3", "E*" }, /* read 1 byte at address 3 */ | |
572 | { "m0,4", "E*" }, /* read 1 byte at address 4 */ | |
573 | { "m0,5", "E*" }, /* read 1 byte at address 5 */ | |
574 | { "m0,6", "E*" }, /* read 1 byte at address 6 */ | |
575 | { "m0,7", "E*" }, /* read 1 byte at address 7 */ | |
576 | { "m0,8", "E*" }, /* read 1 byte at address 8 */ | |
577 | { "D", "OK" }, /* Detach which removes all breakpoints and continues */ | |
578 | { "", "" }, | |
579 | }; | |
580 | ||
581 | /* | |
582 | * Test for hitting a breakpoint, remove it, single step, plant it | |
583 | * again and detach. | |
584 | */ | |
585 | static struct test_struct singlestep_break_test[] = { | |
586 | { "?", "S0*" }, /* Clear break points */ | |
587 | { "kgdbts_break_test", "OK", sw_break, }, /* set sw breakpoint */ | |
486c5987 JW |
588 | { "c", "T0*", NULL, get_thread_id_continue }, /* Continue */ |
589 | { "kgdbts_break_test", "OK", sw_rem_break }, /*remove breakpoint */ | |
001fddf5 | 590 | { "g", "kgdbts_break_test", NULL, check_and_rewind_pc }, |
e8d31c20 | 591 | { "write", "OK", write_regs }, /* Write registers */ |
e8d31c20 | 592 | { "s", "T0*", emul_sstep_get, emul_sstep_put }, /* Single step */ |
001fddf5 | 593 | { "g", "kgdbts_break_test", NULL, check_single_step }, |
e8d31c20 JW |
594 | { "kgdbts_break_test", "OK", sw_break, }, /* set sw breakpoint */ |
595 | { "c", "T0*", }, /* Continue */ | |
001fddf5 | 596 | { "g", "kgdbts_break_test", NULL, check_and_rewind_pc }, |
e8d31c20 JW |
597 | { "write", "OK", write_regs }, /* Write registers */ |
598 | { "D", "OK" }, /* Remove all breakpoints and continues */ | |
599 | { "", "" }, | |
600 | }; | |
601 | ||
602 | /* | |
603 | * Test for hitting a breakpoint at do_fork for what ever the number | |
604 | * of iterations required by the variable repeat_test. | |
605 | */ | |
606 | static struct test_struct do_fork_test[] = { | |
607 | { "?", "S0*" }, /* Clear break points */ | |
608 | { "do_fork", "OK", sw_break, }, /* set sw breakpoint */ | |
486c5987 JW |
609 | { "c", "T0*", NULL, get_thread_id_continue }, /* Continue */ |
610 | { "do_fork", "OK", sw_rem_break }, /*remove breakpoint */ | |
001fddf5 | 611 | { "g", "do_fork", NULL, check_and_rewind_pc }, /* check location */ |
23bbd8e3 | 612 | { "write", "OK", write_regs, emul_reset }, /* Write registers */ |
e8d31c20 | 613 | { "s", "T0*", emul_sstep_get, emul_sstep_put }, /* Single step */ |
001fddf5 | 614 | { "g", "do_fork", NULL, check_single_step }, |
e8d31c20 JW |
615 | { "do_fork", "OK", sw_break, }, /* set sw breakpoint */ |
616 | { "7", "T0*", skip_back_repeat_test }, /* Loop based on repeat_test */ | |
001fddf5 | 617 | { "D", "OK", NULL, final_ack_set }, /* detach and unregister I/O */ |
23bbd8e3 | 618 | { "", "", get_cont_catch, put_cont_catch }, |
e8d31c20 JW |
619 | }; |
620 | ||
621 | /* Test for hitting a breakpoint at sys_open for what ever the number | |
622 | * of iterations required by the variable repeat_test. | |
623 | */ | |
624 | static struct test_struct sys_open_test[] = { | |
625 | { "?", "S0*" }, /* Clear break points */ | |
626 | { "sys_open", "OK", sw_break, }, /* set sw breakpoint */ | |
486c5987 JW |
627 | { "c", "T0*", NULL, get_thread_id_continue }, /* Continue */ |
628 | { "sys_open", "OK", sw_rem_break }, /*remove breakpoint */ | |
001fddf5 | 629 | { "g", "sys_open", NULL, check_and_rewind_pc }, /* check location */ |
23bbd8e3 | 630 | { "write", "OK", write_regs, emul_reset }, /* Write registers */ |
e8d31c20 | 631 | { "s", "T0*", emul_sstep_get, emul_sstep_put }, /* Single step */ |
001fddf5 | 632 | { "g", "sys_open", NULL, check_single_step }, |
e8d31c20 JW |
633 | { "sys_open", "OK", sw_break, }, /* set sw breakpoint */ |
634 | { "7", "T0*", skip_back_repeat_test }, /* Loop based on repeat_test */ | |
001fddf5 | 635 | { "D", "OK", NULL, final_ack_set }, /* detach and unregister I/O */ |
23bbd8e3 | 636 | { "", "", get_cont_catch, put_cont_catch }, |
e8d31c20 JW |
637 | }; |
638 | ||
639 | /* | |
640 | * Test for hitting a simple hw breakpoint | |
641 | */ | |
642 | static struct test_struct hw_breakpoint_test[] = { | |
643 | { "?", "S0*" }, /* Clear break points */ | |
644 | { "kgdbts_break_test", "OK", hw_break, }, /* set hw breakpoint */ | |
645 | { "c", "T0*", }, /* Continue */ | |
001fddf5 | 646 | { "g", "kgdbts_break_test", NULL, check_and_rewind_pc }, |
e8d31c20 JW |
647 | { "write", "OK", write_regs }, |
648 | { "kgdbts_break_test", "OK", hw_rem_break }, /*remove breakpoint */ | |
649 | { "D", "OK" }, /* Detach */ | |
001fddf5 | 650 | { "D", "OK", NULL, got_break }, /* On success we made it here */ |
e8d31c20 JW |
651 | { "", "" }, |
652 | }; | |
653 | ||
654 | /* | |
655 | * Test for hitting a hw write breakpoint | |
656 | */ | |
657 | static struct test_struct hw_write_break_test[] = { | |
658 | { "?", "S0*" }, /* Clear break points */ | |
659 | { "hw_break_val", "OK", hw_write_break, }, /* set hw breakpoint */ | |
001fddf5 HH |
660 | { "c", "T0*", NULL, got_break }, /* Continue */ |
661 | { "g", "silent", NULL, check_and_rewind_pc }, | |
e8d31c20 JW |
662 | { "write", "OK", write_regs }, |
663 | { "hw_break_val", "OK", hw_rem_write_break }, /*remove breakpoint */ | |
664 | { "D", "OK" }, /* Detach */ | |
001fddf5 | 665 | { "D", "OK", NULL, got_break }, /* On success we made it here */ |
e8d31c20 JW |
666 | { "", "" }, |
667 | }; | |
668 | ||
669 | /* | |
670 | * Test for hitting a hw access breakpoint | |
671 | */ | |
672 | static struct test_struct hw_access_break_test[] = { | |
673 | { "?", "S0*" }, /* Clear break points */ | |
674 | { "hw_break_val", "OK", hw_access_break, }, /* set hw breakpoint */ | |
001fddf5 HH |
675 | { "c", "T0*", NULL, got_break }, /* Continue */ |
676 | { "g", "silent", NULL, check_and_rewind_pc }, | |
e8d31c20 JW |
677 | { "write", "OK", write_regs }, |
678 | { "hw_break_val", "OK", hw_rem_access_break }, /*remove breakpoint */ | |
679 | { "D", "OK" }, /* Detach */ | |
001fddf5 | 680 | { "D", "OK", NULL, got_break }, /* On success we made it here */ |
e8d31c20 JW |
681 | { "", "" }, |
682 | }; | |
683 | ||
684 | /* | |
685 | * Test for hitting a hw access breakpoint | |
686 | */ | |
687 | static struct test_struct nmi_sleep_test[] = { | |
688 | { "?", "S0*" }, /* Clear break points */ | |
001fddf5 | 689 | { "c", "T0*", NULL, got_break }, /* Continue */ |
e8d31c20 | 690 | { "D", "OK" }, /* Detach */ |
001fddf5 | 691 | { "D", "OK", NULL, got_break }, /* On success we made it here */ |
e8d31c20 JW |
692 | { "", "" }, |
693 | }; | |
694 | ||
695 | static void fill_get_buf(char *buf) | |
696 | { | |
697 | unsigned char checksum = 0; | |
698 | int count = 0; | |
699 | char ch; | |
700 | ||
701 | strcpy(get_buf, "$"); | |
702 | strcat(get_buf, buf); | |
703 | while ((ch = buf[count])) { | |
704 | checksum += ch; | |
705 | count++; | |
706 | } | |
707 | strcat(get_buf, "#"); | |
827e609b HH |
708 | get_buf[count + 2] = hex_asc_hi(checksum); |
709 | get_buf[count + 3] = hex_asc_lo(checksum); | |
e8d31c20 JW |
710 | get_buf[count + 4] = '\0'; |
711 | v2printk("get%i: %s\n", ts.idx, get_buf); | |
712 | } | |
713 | ||
714 | static int validate_simple_test(char *put_str) | |
715 | { | |
716 | char *chk_str; | |
717 | ||
718 | if (ts.tst[ts.idx].put_handler) | |
719 | return ts.tst[ts.idx].put_handler(put_str, | |
720 | ts.tst[ts.idx].put); | |
721 | ||
722 | chk_str = ts.tst[ts.idx].put; | |
723 | if (*put_str == '$') | |
724 | put_str++; | |
725 | ||
726 | while (*chk_str != '\0' && *put_str != '\0') { | |
727 | /* If someone does a * to match the rest of the string, allow | |
25985edc | 728 | * it, or stop if the received string is complete. |
e8d31c20 JW |
729 | */ |
730 | if (*put_str == '#' || *chk_str == '*') | |
731 | return 0; | |
732 | if (*put_str != *chk_str) | |
733 | return 1; | |
734 | ||
735 | chk_str++; | |
736 | put_str++; | |
737 | } | |
738 | if (*chk_str == '\0' && (*put_str == '\0' || *put_str == '#')) | |
739 | return 0; | |
740 | ||
741 | return 1; | |
742 | } | |
743 | ||
744 | static int run_simple_test(int is_get_char, int chr) | |
745 | { | |
746 | int ret = 0; | |
747 | if (is_get_char) { | |
748 | /* Send an ACK on the get if a prior put completed and set the | |
749 | * send ack variable | |
750 | */ | |
751 | if (send_ack) { | |
752 | send_ack = 0; | |
753 | return '+'; | |
754 | } | |
755 | /* On the first get char, fill the transmit buffer and then | |
756 | * take from the get_string. | |
757 | */ | |
758 | if (get_buf_cnt == 0) { | |
759 | if (ts.tst[ts.idx].get_handler) | |
760 | ts.tst[ts.idx].get_handler(ts.tst[ts.idx].get); | |
761 | else | |
762 | fill_get_buf(ts.tst[ts.idx].get); | |
763 | } | |
764 | ||
765 | if (get_buf[get_buf_cnt] == '\0') { | |
974460c5 | 766 | eprintk("kgdbts: ERROR GET: EOB on '%s' at %i\n", |
e8d31c20 JW |
767 | ts.name, ts.idx); |
768 | get_buf_cnt = 0; | |
769 | fill_get_buf("D"); | |
770 | } | |
771 | ret = get_buf[get_buf_cnt]; | |
772 | get_buf_cnt++; | |
773 | return ret; | |
774 | } | |
775 | ||
776 | /* This callback is a put char which is when kgdb sends data to | |
777 | * this I/O module. | |
778 | */ | |
23bbd8e3 JW |
779 | if (ts.tst[ts.idx].get[0] == '\0' && ts.tst[ts.idx].put[0] == '\0' && |
780 | !ts.tst[ts.idx].get_handler) { | |
974460c5 | 781 | eprintk("kgdbts: ERROR: beyond end of test on" |
e8d31c20 JW |
782 | " '%s' line %i\n", ts.name, ts.idx); |
783 | return 0; | |
784 | } | |
785 | ||
786 | if (put_buf_cnt >= BUFMAX) { | |
974460c5 | 787 | eprintk("kgdbts: ERROR: put buffer overflow on" |
e8d31c20 JW |
788 | " '%s' line %i\n", ts.name, ts.idx); |
789 | put_buf_cnt = 0; | |
790 | return 0; | |
791 | } | |
792 | /* Ignore everything until the first valid packet start '$' */ | |
793 | if (put_buf_cnt == 0 && chr != '$') | |
794 | return 0; | |
795 | ||
796 | put_buf[put_buf_cnt] = chr; | |
797 | put_buf_cnt++; | |
798 | ||
799 | /* End of packet == #XX so look for the '#' */ | |
800 | if (put_buf_cnt > 3 && put_buf[put_buf_cnt - 3] == '#') { | |
b4f1b67b RK |
801 | if (put_buf_cnt >= BUFMAX) { |
802 | eprintk("kgdbts: ERROR: put buffer overflow on" | |
803 | " '%s' line %i\n", ts.name, ts.idx); | |
804 | put_buf_cnt = 0; | |
805 | return 0; | |
806 | } | |
e8d31c20 JW |
807 | put_buf[put_buf_cnt] = '\0'; |
808 | v2printk("put%i: %s\n", ts.idx, put_buf); | |
809 | /* Trigger check here */ | |
810 | if (ts.validate_put && ts.validate_put(put_buf)) { | |
974460c5 | 811 | eprintk("kgdbts: ERROR PUT: end of test " |
e8d31c20 JW |
812 | "buffer on '%s' line %i expected %s got %s\n", |
813 | ts.name, ts.idx, ts.tst[ts.idx].put, put_buf); | |
814 | } | |
815 | ts.idx++; | |
816 | put_buf_cnt = 0; | |
817 | get_buf_cnt = 0; | |
818 | send_ack = 1; | |
819 | } | |
820 | return 0; | |
821 | } | |
822 | ||
823 | static void init_simple_test(void) | |
824 | { | |
825 | memset(&ts, 0, sizeof(ts)); | |
826 | ts.run_test = run_simple_test; | |
827 | ts.validate_put = validate_simple_test; | |
828 | } | |
829 | ||
830 | static void run_plant_and_detach_test(int is_early) | |
831 | { | |
832 | char before[BREAK_INSTR_SIZE]; | |
833 | char after[BREAK_INSTR_SIZE]; | |
834 | ||
835 | probe_kernel_read(before, (char *)kgdbts_break_test, | |
836 | BREAK_INSTR_SIZE); | |
837 | init_simple_test(); | |
838 | ts.tst = plant_and_detach_test; | |
839 | ts.name = "plant_and_detach_test"; | |
840 | /* Activate test with initial breakpoint */ | |
841 | if (!is_early) | |
842 | kgdb_breakpoint(); | |
843 | probe_kernel_read(after, (char *)kgdbts_break_test, | |
844 | BREAK_INSTR_SIZE); | |
845 | if (memcmp(before, after, BREAK_INSTR_SIZE)) { | |
846 | printk(KERN_CRIT "kgdbts: ERROR kgdb corrupted memory\n"); | |
847 | panic("kgdb memory corruption"); | |
848 | } | |
849 | ||
850 | /* complete the detach test */ | |
851 | if (!is_early) | |
852 | kgdbts_break_test(); | |
853 | } | |
854 | ||
855 | static void run_breakpoint_test(int is_hw_breakpoint) | |
856 | { | |
857 | test_complete = 0; | |
858 | init_simple_test(); | |
859 | if (is_hw_breakpoint) { | |
860 | ts.tst = hw_breakpoint_test; | |
861 | ts.name = "hw_breakpoint_test"; | |
862 | } else { | |
863 | ts.tst = sw_breakpoint_test; | |
864 | ts.name = "sw_breakpoint_test"; | |
865 | } | |
866 | /* Activate test with initial breakpoint */ | |
867 | kgdb_breakpoint(); | |
868 | /* run code with the break point in it */ | |
869 | kgdbts_break_test(); | |
870 | kgdb_breakpoint(); | |
871 | ||
872 | if (test_complete) | |
873 | return; | |
874 | ||
974460c5 | 875 | eprintk("kgdbts: ERROR %s test failed\n", ts.name); |
b33cb815 JW |
876 | if (is_hw_breakpoint) |
877 | hwbreaks_ok = 0; | |
e8d31c20 JW |
878 | } |
879 | ||
880 | static void run_hw_break_test(int is_write_test) | |
881 | { | |
882 | test_complete = 0; | |
883 | init_simple_test(); | |
884 | if (is_write_test) { | |
885 | ts.tst = hw_write_break_test; | |
886 | ts.name = "hw_write_break_test"; | |
887 | } else { | |
888 | ts.tst = hw_access_break_test; | |
889 | ts.name = "hw_access_break_test"; | |
890 | } | |
891 | /* Activate test with initial breakpoint */ | |
892 | kgdb_breakpoint(); | |
893 | hw_break_val_access(); | |
894 | if (is_write_test) { | |
b33cb815 | 895 | if (test_complete == 2) { |
974460c5 | 896 | eprintk("kgdbts: ERROR %s broke on access\n", |
e8d31c20 | 897 | ts.name); |
b33cb815 JW |
898 | hwbreaks_ok = 0; |
899 | } | |
e8d31c20 JW |
900 | hw_break_val_write(); |
901 | } | |
902 | kgdb_breakpoint(); | |
903 | ||
904 | if (test_complete == 1) | |
905 | return; | |
906 | ||
974460c5 | 907 | eprintk("kgdbts: ERROR %s test failed\n", ts.name); |
b33cb815 | 908 | hwbreaks_ok = 0; |
e8d31c20 JW |
909 | } |
910 | ||
911 | static void run_nmi_sleep_test(int nmi_sleep) | |
912 | { | |
913 | unsigned long flags; | |
914 | ||
915 | init_simple_test(); | |
916 | ts.tst = nmi_sleep_test; | |
917 | ts.name = "nmi_sleep_test"; | |
918 | /* Activate test with initial breakpoint */ | |
919 | kgdb_breakpoint(); | |
920 | local_irq_save(flags); | |
921 | mdelay(nmi_sleep*1000); | |
922 | touch_nmi_watchdog(); | |
923 | local_irq_restore(flags); | |
924 | if (test_complete != 2) | |
974460c5 | 925 | eprintk("kgdbts: ERROR nmi_test did not hit nmi\n"); |
e8d31c20 JW |
926 | kgdb_breakpoint(); |
927 | if (test_complete == 1) | |
928 | return; | |
929 | ||
974460c5 | 930 | eprintk("kgdbts: ERROR %s test failed\n", ts.name); |
e8d31c20 JW |
931 | } |
932 | ||
933 | static void run_bad_read_test(void) | |
934 | { | |
935 | init_simple_test(); | |
936 | ts.tst = bad_read_test; | |
937 | ts.name = "bad_read_test"; | |
938 | /* Activate test with initial breakpoint */ | |
939 | kgdb_breakpoint(); | |
940 | } | |
941 | ||
942 | static void run_do_fork_test(void) | |
943 | { | |
944 | init_simple_test(); | |
945 | ts.tst = do_fork_test; | |
946 | ts.name = "do_fork_test"; | |
947 | /* Activate test with initial breakpoint */ | |
948 | kgdb_breakpoint(); | |
949 | } | |
950 | ||
951 | static void run_sys_open_test(void) | |
952 | { | |
953 | init_simple_test(); | |
954 | ts.tst = sys_open_test; | |
955 | ts.name = "sys_open_test"; | |
956 | /* Activate test with initial breakpoint */ | |
957 | kgdb_breakpoint(); | |
958 | } | |
959 | ||
960 | static void run_singlestep_break_test(void) | |
961 | { | |
962 | init_simple_test(); | |
963 | ts.tst = singlestep_break_test; | |
964 | ts.name = "singlestep_breakpoint_test"; | |
965 | /* Activate test with initial breakpoint */ | |
966 | kgdb_breakpoint(); | |
967 | kgdbts_break_test(); | |
968 | kgdbts_break_test(); | |
969 | } | |
970 | ||
971 | static void kgdbts_run_tests(void) | |
972 | { | |
973 | char *ptr; | |
974 | int fork_test = 0; | |
001fddf5 | 975 | int do_sys_open_test = 0; |
7cfcd985 | 976 | int sstep_test = 1000; |
e8d31c20 | 977 | int nmi_sleep = 0; |
7cfcd985 | 978 | int i; |
e8d31c20 | 979 | |
59d309f9 | 980 | ptr = strchr(config, 'F'); |
e8d31c20 | 981 | if (ptr) |
001fddf5 | 982 | fork_test = simple_strtol(ptr + 1, NULL, 10); |
59d309f9 | 983 | ptr = strchr(config, 'S'); |
e8d31c20 | 984 | if (ptr) |
001fddf5 | 985 | do_sys_open_test = simple_strtol(ptr + 1, NULL, 10); |
59d309f9 | 986 | ptr = strchr(config, 'N'); |
e8d31c20 JW |
987 | if (ptr) |
988 | nmi_sleep = simple_strtol(ptr+1, NULL, 10); | |
59d309f9 | 989 | ptr = strchr(config, 'I'); |
7cfcd985 JW |
990 | if (ptr) |
991 | sstep_test = simple_strtol(ptr+1, NULL, 10); | |
e8d31c20 | 992 | |
456ca7ff JW |
993 | /* All HW break point tests */ |
994 | if (arch_kgdb_ops.flags & KGDB_HW_BREAKPOINT) { | |
995 | hwbreaks_ok = 1; | |
996 | v1printk("kgdbts:RUN hw breakpoint test\n"); | |
997 | run_breakpoint_test(1); | |
998 | v1printk("kgdbts:RUN hw write breakpoint test\n"); | |
999 | run_hw_break_test(1); | |
1000 | v1printk("kgdbts:RUN access write breakpoint test\n"); | |
1001 | run_hw_break_test(0); | |
1002 | } | |
456ca7ff | 1003 | |
e8d31c20 JW |
1004 | /* required internal KGDB tests */ |
1005 | v1printk("kgdbts:RUN plant and detach test\n"); | |
1006 | run_plant_and_detach_test(0); | |
1007 | v1printk("kgdbts:RUN sw breakpoint test\n"); | |
1008 | run_breakpoint_test(0); | |
1009 | v1printk("kgdbts:RUN bad memory access test\n"); | |
1010 | run_bad_read_test(); | |
7cfcd985 JW |
1011 | v1printk("kgdbts:RUN singlestep test %i iterations\n", sstep_test); |
1012 | for (i = 0; i < sstep_test; i++) { | |
1013 | run_singlestep_break_test(); | |
1014 | if (i % 100 == 0) | |
1015 | v1printk("kgdbts:RUN singlestep [%i/%i]\n", | |
1016 | i, sstep_test); | |
1017 | } | |
e8d31c20 JW |
1018 | |
1019 | /* ===Optional tests=== */ | |
1020 | ||
e8d31c20 JW |
1021 | if (nmi_sleep) { |
1022 | v1printk("kgdbts:RUN NMI sleep %i seconds test\n", nmi_sleep); | |
1023 | run_nmi_sleep_test(nmi_sleep); | |
1024 | } | |
1025 | ||
1026 | /* If the do_fork test is run it will be the last test that is | |
1027 | * executed because a kernel thread will be spawned at the very | |
1028 | * end to unregister the debug hooks. | |
1029 | */ | |
1030 | if (fork_test) { | |
1031 | repeat_test = fork_test; | |
1032 | printk(KERN_INFO "kgdbts:RUN do_fork for %i breakpoints\n", | |
1033 | repeat_test); | |
001fddf5 | 1034 | kthread_run(kgdbts_unreg_thread, NULL, "kgdbts_unreg"); |
e8d31c20 JW |
1035 | run_do_fork_test(); |
1036 | return; | |
1037 | } | |
1038 | ||
1039 | /* If the sys_open test is run it will be the last test that is | |
1040 | * executed because a kernel thread will be spawned at the very | |
1041 | * end to unregister the debug hooks. | |
1042 | */ | |
001fddf5 HH |
1043 | if (do_sys_open_test) { |
1044 | repeat_test = do_sys_open_test; | |
e8d31c20 JW |
1045 | printk(KERN_INFO "kgdbts:RUN sys_open for %i breakpoints\n", |
1046 | repeat_test); | |
001fddf5 | 1047 | kthread_run(kgdbts_unreg_thread, NULL, "kgdbts_unreg"); |
e8d31c20 JW |
1048 | run_sys_open_test(); |
1049 | return; | |
1050 | } | |
1051 | /* Shutdown and unregister */ | |
1052 | kgdb_unregister_io_module(&kgdbts_io_ops); | |
1053 | configured = 0; | |
1054 | } | |
1055 | ||
1056 | static int kgdbts_option_setup(char *opt) | |
1057 | { | |
adb4b83c | 1058 | if (strlen(opt) >= MAX_CONFIG_LEN) { |
e8d31c20 JW |
1059 | printk(KERN_ERR "kgdbts: config string too long\n"); |
1060 | return -ENOSPC; | |
1061 | } | |
1062 | strcpy(config, opt); | |
1063 | ||
1064 | verbose = 0; | |
1065 | if (strstr(config, "V1")) | |
1066 | verbose = 1; | |
1067 | if (strstr(config, "V2")) | |
1068 | verbose = 2; | |
1069 | ||
1070 | return 0; | |
1071 | } | |
1072 | ||
1073 | __setup("kgdbts=", kgdbts_option_setup); | |
1074 | ||
1075 | static int configure_kgdbts(void) | |
1076 | { | |
1077 | int err = 0; | |
1078 | ||
1079 | if (!strlen(config) || isspace(config[0])) | |
1080 | goto noconfig; | |
1081 | err = kgdbts_option_setup(config); | |
1082 | if (err) | |
1083 | goto noconfig; | |
1084 | ||
1085 | final_ack = 0; | |
1086 | run_plant_and_detach_test(1); | |
1087 | ||
1088 | err = kgdb_register_io_module(&kgdbts_io_ops); | |
1089 | if (err) { | |
1090 | configured = 0; | |
1091 | return err; | |
1092 | } | |
1093 | configured = 1; | |
1094 | kgdbts_run_tests(); | |
1095 | ||
1096 | return err; | |
1097 | ||
1098 | noconfig: | |
1099 | config[0] = 0; | |
1100 | configured = 0; | |
1101 | ||
1102 | return err; | |
1103 | } | |
1104 | ||
1105 | static int __init init_kgdbts(void) | |
1106 | { | |
1107 | /* Already configured? */ | |
1108 | if (configured == 1) | |
1109 | return 0; | |
1110 | ||
1111 | return configure_kgdbts(); | |
1112 | } | |
1113 | ||
e8d31c20 JW |
1114 | static int kgdbts_get_char(void) |
1115 | { | |
1116 | int val = 0; | |
1117 | ||
1118 | if (ts.run_test) | |
1119 | val = ts.run_test(1, 0); | |
1120 | ||
1121 | return val; | |
1122 | } | |
1123 | ||
1124 | static void kgdbts_put_char(u8 chr) | |
1125 | { | |
1126 | if (ts.run_test) | |
1127 | ts.run_test(0, chr); | |
1128 | } | |
1129 | ||
1130 | static int param_set_kgdbts_var(const char *kmessage, struct kernel_param *kp) | |
1131 | { | |
1132 | int len = strlen(kmessage); | |
1133 | ||
1134 | if (len >= MAX_CONFIG_LEN) { | |
1135 | printk(KERN_ERR "kgdbts: config string too long\n"); | |
1136 | return -ENOSPC; | |
1137 | } | |
1138 | ||
1139 | /* Only copy in the string if the init function has not run yet */ | |
1140 | if (configured < 0) { | |
1141 | strcpy(config, kmessage); | |
1142 | return 0; | |
1143 | } | |
1144 | ||
4dacd5c0 DD |
1145 | if (configured == 1) { |
1146 | printk(KERN_ERR "kgdbts: ERROR: Already configured and running.\n"); | |
e8d31c20 JW |
1147 | return -EBUSY; |
1148 | } | |
1149 | ||
1150 | strcpy(config, kmessage); | |
1151 | /* Chop out \n char as a result of echo */ | |
1152 | if (config[len - 1] == '\n') | |
1153 | config[len - 1] = '\0'; | |
1154 | ||
e8d31c20 JW |
1155 | /* Go and configure with the new params. */ |
1156 | return configure_kgdbts(); | |
1157 | } | |
1158 | ||
1159 | static void kgdbts_pre_exp_handler(void) | |
1160 | { | |
1161 | /* Increment the module count when the debugger is active */ | |
1162 | if (!kgdb_connected) | |
1163 | try_module_get(THIS_MODULE); | |
1164 | } | |
1165 | ||
1166 | static void kgdbts_post_exp_handler(void) | |
1167 | { | |
1168 | /* decrement the module count when the debugger detaches */ | |
1169 | if (!kgdb_connected) | |
1170 | module_put(THIS_MODULE); | |
1171 | } | |
1172 | ||
1173 | static struct kgdb_io kgdbts_io_ops = { | |
1174 | .name = "kgdbts", | |
1175 | .read_char = kgdbts_get_char, | |
1176 | .write_char = kgdbts_put_char, | |
1177 | .pre_exception = kgdbts_pre_exp_handler, | |
1178 | .post_exception = kgdbts_post_exp_handler, | |
1179 | }; | |
1180 | ||
1181 | module_init(init_kgdbts); | |
e8d31c20 JW |
1182 | module_param_call(kgdbts, param_set_kgdbts_var, param_get_string, &kps, 0644); |
1183 | MODULE_PARM_DESC(kgdbts, "<A|V1|V2>[F#|S#][N#]"); | |
1184 | MODULE_DESCRIPTION("KGDB Test Suite"); | |
1185 | MODULE_LICENSE("GPL"); | |
1186 | MODULE_AUTHOR("Wind River Systems, Inc."); | |
1187 |