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45051539 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
e8d31c20 JW |
2 | /* |
3 | * kgdbts is a test suite for kgdb for the sole purpose of validating | |
4 | * that key pieces of the kgdb internals are working properly such as | |
5 | * HW/SW breakpoints, single stepping, and NMI. | |
6 | * | |
7 | * Created by: Jason Wessel <jason.wessel@windriver.com> | |
8 | * | |
9 | * Copyright (c) 2008 Wind River Systems, Inc. | |
e8d31c20 JW |
10 | */ |
11 | /* Information about the kgdb test suite. | |
12 | * ------------------------------------- | |
13 | * | |
14 | * The kgdb test suite is designed as a KGDB I/O module which | |
15 | * simulates the communications that a debugger would have with kgdb. | |
16 | * The tests are broken up in to a line by line and referenced here as | |
17 | * a "get" which is kgdb requesting input and "put" which is kgdb | |
18 | * sending a response. | |
19 | * | |
20 | * The kgdb suite can be invoked from the kernel command line | |
21 | * arguments system or executed dynamically at run time. The test | |
22 | * suite uses the variable "kgdbts" to obtain the information about | |
23 | * which tests to run and to configure the verbosity level. The | |
24 | * following are the various characters you can use with the kgdbts= | |
25 | * line: | |
26 | * | |
27 | * When using the "kgdbts=" you only choose one of the following core | |
28 | * test types: | |
29 | * A = Run all the core tests silently | |
30 | * V1 = Run all the core tests with minimal output | |
31 | * V2 = Run all the core tests in debug mode | |
32 | * | |
33 | * You can also specify optional tests: | |
34 | * N## = Go to sleep with interrupts of for ## seconds | |
35 | * to test the HW NMI watchdog | |
f30897c1 | 36 | * F## = Break at kernel_clone for ## iterations |
e8d31c20 | 37 | * S## = Break at sys_open for ## iterations |
7cfcd985 | 38 | * I## = Run the single step test ## iterations |
e8d31c20 | 39 | * |
f30897c1 | 40 | * NOTE: that the kernel_clone and sys_open tests are mutually exclusive. |
e8d31c20 JW |
41 | * |
42 | * To invoke the kgdb test suite from boot you use a kernel start | |
43 | * argument as follows: | |
44 | * kgdbts=V1 kgdbwait | |
f30897c1 | 45 | * Or if you wanted to perform the NMI test for 6 seconds and kernel_clone |
e8d31c20 JW |
46 | * test for 100 forks, you could use: |
47 | * kgdbts=V1N6F100 kgdbwait | |
48 | * | |
49 | * The test suite can also be invoked at run time with: | |
50 | * echo kgdbts=V1N6F100 > /sys/module/kgdbts/parameters/kgdbts | |
51 | * Or as another example: | |
52 | * echo kgdbts=V2 > /sys/module/kgdbts/parameters/kgdbts | |
53 | * | |
54 | * When developing a new kgdb arch specific implementation or | |
55 | * using these tests for the purpose of regression testing, | |
56 | * several invocations are required. | |
57 | * | |
58 | * 1) Boot with the test suite enabled by using the kernel arguments | |
59 | * "kgdbts=V1F100 kgdbwait" | |
60 | * ## If kgdb arch specific implementation has NMI use | |
61 | * "kgdbts=V1N6F100 | |
62 | * | |
63 | * 2) After the system boot run the basic test. | |
64 | * echo kgdbts=V1 > /sys/module/kgdbts/parameters/kgdbts | |
65 | * | |
66 | * 3) Run the concurrency tests. It is best to use n+1 | |
67 | * while loops where n is the number of cpus you have | |
68 | * in your system. The example below uses only two | |
69 | * loops. | |
70 | * | |
71 | * ## This tests break points on sys_open | |
72 | * while [ 1 ] ; do find / > /dev/null 2>&1 ; done & | |
73 | * while [ 1 ] ; do find / > /dev/null 2>&1 ; done & | |
74 | * echo kgdbts=V1S10000 > /sys/module/kgdbts/parameters/kgdbts | |
75 | * fg # and hit control-c | |
76 | * fg # and hit control-c | |
f30897c1 | 77 | * ## This tests break points on kernel_clone |
e8d31c20 JW |
78 | * while [ 1 ] ; do date > /dev/null ; done & |
79 | * while [ 1 ] ; do date > /dev/null ; done & | |
80 | * echo kgdbts=V1F1000 > /sys/module/kgdbts/parameters/kgdbts | |
81 | * fg # and hit control-c | |
82 | * | |
83 | */ | |
84 | ||
85 | #include <linux/kernel.h> | |
86 | #include <linux/kgdb.h> | |
87 | #include <linux/ctype.h> | |
88 | #include <linux/uaccess.h> | |
89 | #include <linux/syscalls.h> | |
90 | #include <linux/nmi.h> | |
91 | #include <linux/delay.h> | |
92 | #include <linux/kthread.h> | |
eb12a679 | 93 | #include <linux/module.h> |
29930025 | 94 | #include <linux/sched/task.h> |
1114ab22 | 95 | #include <linux/kallsyms.h> |
29930025 | 96 | |
e78acf67 | 97 | #include <asm/sections.h> |
e8d31c20 | 98 | |
40cc3a80 AB |
99 | #define v1printk(a...) do { \ |
100 | if (verbose) \ | |
101 | printk(KERN_INFO a); \ | |
102 | } while (0) | |
103 | #define v2printk(a...) do { \ | |
bda7d3ab | 104 | if (verbose > 1) { \ |
40cc3a80 | 105 | printk(KERN_INFO a); \ |
bda7d3ab | 106 | } \ |
40cc3a80 AB |
107 | touch_nmi_watchdog(); \ |
108 | } while (0) | |
109 | #define eprintk(a...) do { \ | |
110 | printk(KERN_ERR a); \ | |
111 | WARN_ON(1); \ | |
112 | } while (0) | |
e8d31c20 JW |
113 | #define MAX_CONFIG_LEN 40 |
114 | ||
e8d31c20 JW |
115 | static struct kgdb_io kgdbts_io_ops; |
116 | static char get_buf[BUFMAX]; | |
117 | static int get_buf_cnt; | |
118 | static char put_buf[BUFMAX]; | |
119 | static int put_buf_cnt; | |
120 | static char scratch_buf[BUFMAX]; | |
121 | static int verbose; | |
122 | static int repeat_test; | |
123 | static int test_complete; | |
124 | static int send_ack; | |
125 | static int final_ack; | |
b33cb815 JW |
126 | static int force_hwbrks; |
127 | static int hwbreaks_ok; | |
e8d31c20 JW |
128 | static int hw_break_val; |
129 | static int hw_break_val2; | |
486c5987 JW |
130 | static int cont_instead_of_sstep; |
131 | static unsigned long cont_thread_id; | |
132 | static unsigned long sstep_thread_id; | |
4d7ffa49 | 133 | #if defined(CONFIG_ARM) || defined(CONFIG_MIPS) || defined(CONFIG_SPARC) |
e8d31c20 JW |
134 | static int arch_needs_sstep_emulation = 1; |
135 | #else | |
136 | static int arch_needs_sstep_emulation; | |
137 | #endif | |
23bbd8e3 | 138 | static unsigned long cont_addr; |
e8d31c20 | 139 | static unsigned long sstep_addr; |
23bbd8e3 | 140 | static int restart_from_top_after_write; |
e8d31c20 JW |
141 | static int sstep_state; |
142 | ||
143 | /* Storage for the registers, in GDB format. */ | |
144 | static unsigned long kgdbts_gdb_regs[(NUMREGBYTES + | |
145 | sizeof(unsigned long) - 1) / | |
146 | sizeof(unsigned long)]; | |
147 | static struct pt_regs kgdbts_regs; | |
148 | ||
149 | /* -1 = init not run yet, 0 = unconfigured, 1 = configured. */ | |
150 | static int configured = -1; | |
151 | ||
974460c5 JW |
152 | #ifdef CONFIG_KGDB_TESTS_BOOT_STRING |
153 | static char config[MAX_CONFIG_LEN] = CONFIG_KGDB_TESTS_BOOT_STRING; | |
154 | #else | |
e8d31c20 | 155 | static char config[MAX_CONFIG_LEN]; |
974460c5 | 156 | #endif |
e8d31c20 JW |
157 | static struct kparam_string kps = { |
158 | .string = config, | |
159 | .maxlen = MAX_CONFIG_LEN, | |
160 | }; | |
161 | ||
162 | static void fill_get_buf(char *buf); | |
163 | ||
164 | struct test_struct { | |
165 | char *get; | |
166 | char *put; | |
167 | void (*get_handler)(char *); | |
168 | int (*put_handler)(char *, char *); | |
169 | }; | |
170 | ||
171 | struct test_state { | |
172 | char *name; | |
173 | struct test_struct *tst; | |
174 | int idx; | |
175 | int (*run_test) (int, int); | |
176 | int (*validate_put) (char *); | |
177 | }; | |
178 | ||
179 | static struct test_state ts; | |
180 | ||
181 | static int kgdbts_unreg_thread(void *ptr) | |
182 | { | |
183 | /* Wait until the tests are complete and then ungresiter the I/O | |
184 | * driver. | |
185 | */ | |
186 | while (!final_ack) | |
187 | msleep_interruptible(1500); | |
23bbd8e3 JW |
188 | /* Pause for any other threads to exit after final ack. */ |
189 | msleep_interruptible(1000); | |
e8d31c20 JW |
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 | ||
1114ab22 DT |
205 | /* |
206 | * This is a cached wrapper for kallsyms_lookup_name(). | |
207 | * | |
208 | * The cache is a big win for several tests. For example it more the doubles | |
209 | * the cycles per second during the sys_open test. This is not theoretic, | |
210 | * the performance improvement shows up at human scale, especially when | |
211 | * testing using emulators. | |
212 | * | |
213 | * Obviously neither re-entrant nor thread-safe but that is OK since it | |
214 | * can only be called from the debug trap (and therefore all other CPUs | |
215 | * are halted). | |
216 | */ | |
e8d31c20 JW |
217 | static unsigned long lookup_addr(char *arg) |
218 | { | |
1114ab22 DT |
219 | static char cached_arg[KSYM_NAME_LEN]; |
220 | static unsigned long cached_addr; | |
221 | ||
222 | if (strcmp(arg, cached_arg)) { | |
223 | strscpy(cached_arg, arg, KSYM_NAME_LEN); | |
224 | cached_addr = kallsyms_lookup_name(arg); | |
225 | } | |
226 | ||
227 | return (unsigned long)dereference_function_descriptor( | |
228 | (void *)cached_addr); | |
e8d31c20 JW |
229 | } |
230 | ||
231 | static void break_helper(char *bp_type, char *arg, unsigned long vaddr) | |
232 | { | |
233 | unsigned long addr; | |
234 | ||
235 | if (arg) | |
236 | addr = lookup_addr(arg); | |
237 | else | |
238 | addr = vaddr; | |
239 | ||
240 | sprintf(scratch_buf, "%s,%lx,%i", bp_type, addr, | |
241 | BREAK_INSTR_SIZE); | |
242 | fill_get_buf(scratch_buf); | |
243 | } | |
244 | ||
245 | static void sw_break(char *arg) | |
246 | { | |
b33cb815 | 247 | break_helper(force_hwbrks ? "Z1" : "Z0", arg, 0); |
e8d31c20 JW |
248 | } |
249 | ||
250 | static void sw_rem_break(char *arg) | |
251 | { | |
b33cb815 | 252 | break_helper(force_hwbrks ? "z1" : "z0", arg, 0); |
e8d31c20 JW |
253 | } |
254 | ||
255 | static void hw_break(char *arg) | |
256 | { | |
257 | break_helper("Z1", arg, 0); | |
258 | } | |
259 | ||
260 | static void hw_rem_break(char *arg) | |
261 | { | |
262 | break_helper("z1", arg, 0); | |
263 | } | |
264 | ||
265 | static void hw_write_break(char *arg) | |
266 | { | |
267 | break_helper("Z2", arg, 0); | |
268 | } | |
269 | ||
270 | static void hw_rem_write_break(char *arg) | |
271 | { | |
272 | break_helper("z2", arg, 0); | |
273 | } | |
274 | ||
275 | static void hw_access_break(char *arg) | |
276 | { | |
277 | break_helper("Z4", arg, 0); | |
278 | } | |
279 | ||
280 | static void hw_rem_access_break(char *arg) | |
281 | { | |
282 | break_helper("z4", arg, 0); | |
283 | } | |
284 | ||
285 | static void hw_break_val_access(void) | |
286 | { | |
287 | hw_break_val2 = hw_break_val; | |
288 | } | |
289 | ||
290 | static void hw_break_val_write(void) | |
291 | { | |
292 | hw_break_val++; | |
293 | } | |
294 | ||
486c5987 JW |
295 | static int get_thread_id_continue(char *put_str, char *arg) |
296 | { | |
297 | char *ptr = &put_str[11]; | |
298 | ||
299 | if (put_str[1] != 'T' || put_str[2] != '0') | |
300 | return 1; | |
301 | kgdb_hex2long(&ptr, &cont_thread_id); | |
302 | return 0; | |
303 | } | |
304 | ||
e8d31c20 JW |
305 | static int check_and_rewind_pc(char *put_str, char *arg) |
306 | { | |
307 | unsigned long addr = lookup_addr(arg); | |
63ab25eb | 308 | unsigned long ip; |
e8d31c20 JW |
309 | int offset = 0; |
310 | ||
311 | kgdb_hex2mem(&put_str[1], (char *)kgdbts_gdb_regs, | |
312 | NUMREGBYTES); | |
313 | gdb_regs_to_pt_regs(kgdbts_gdb_regs, &kgdbts_regs); | |
63ab25eb MF |
314 | ip = instruction_pointer(&kgdbts_regs); |
315 | v2printk("Stopped at IP: %lx\n", ip); | |
316 | #ifdef GDB_ADJUSTS_BREAK_OFFSET | |
317 | /* On some arches, a breakpoint stop requires it to be decremented */ | |
318 | if (addr + BREAK_INSTR_SIZE == ip) | |
319 | offset = -BREAK_INSTR_SIZE; | |
e8d31c20 | 320 | #endif |
23bbd8e3 JW |
321 | |
322 | if (arch_needs_sstep_emulation && sstep_addr && | |
323 | ip + offset == sstep_addr && | |
1114ab22 | 324 | ((!strcmp(arg, "do_sys_openat2") || !strcmp(arg, "kernel_clone")))) { |
23bbd8e3 JW |
325 | /* This is special case for emulated single step */ |
326 | v2printk("Emul: rewind hit single step bp\n"); | |
327 | restart_from_top_after_write = 1; | |
328 | } else if (strcmp(arg, "silent") && ip + offset != addr) { | |
974460c5 | 329 | eprintk("kgdbts: BP mismatch %lx expected %lx\n", |
63ab25eb | 330 | ip + offset, addr); |
e8d31c20 JW |
331 | return 1; |
332 | } | |
63ab25eb | 333 | /* Readjust the instruction pointer if needed */ |
603d04b2 | 334 | ip += offset; |
23bbd8e3 | 335 | cont_addr = ip; |
603d04b2 MF |
336 | #ifdef GDB_ADJUSTS_BREAK_OFFSET |
337 | instruction_pointer_set(&kgdbts_regs, ip); | |
338 | #endif | |
e8d31c20 JW |
339 | return 0; |
340 | } | |
341 | ||
342 | static int check_single_step(char *put_str, char *arg) | |
343 | { | |
344 | unsigned long addr = lookup_addr(arg); | |
23bbd8e3 JW |
345 | static int matched_id; |
346 | ||
e8d31c20 JW |
347 | /* |
348 | * From an arch indepent point of view the instruction pointer | |
349 | * should be on a different instruction | |
350 | */ | |
351 | kgdb_hex2mem(&put_str[1], (char *)kgdbts_gdb_regs, | |
352 | NUMREGBYTES); | |
353 | gdb_regs_to_pt_regs(kgdbts_gdb_regs, &kgdbts_regs); | |
354 | v2printk("Singlestep stopped at IP: %lx\n", | |
355 | instruction_pointer(&kgdbts_regs)); | |
486c5987 | 356 | |
23bbd8e3 | 357 | if (sstep_thread_id != cont_thread_id) { |
486c5987 JW |
358 | /* |
359 | * Ensure we stopped in the same thread id as before, else the | |
360 | * debugger should continue until the original thread that was | |
361 | * single stepped is scheduled again, emulating gdb's behavior. | |
362 | */ | |
363 | v2printk("ThrID does not match: %lx\n", cont_thread_id); | |
23bbd8e3 JW |
364 | if (arch_needs_sstep_emulation) { |
365 | if (matched_id && | |
366 | instruction_pointer(&kgdbts_regs) != addr) | |
367 | goto continue_test; | |
368 | matched_id++; | |
369 | ts.idx -= 2; | |
370 | sstep_state = 0; | |
371 | return 0; | |
372 | } | |
486c5987 JW |
373 | cont_instead_of_sstep = 1; |
374 | ts.idx -= 4; | |
375 | return 0; | |
376 | } | |
23bbd8e3 JW |
377 | continue_test: |
378 | matched_id = 0; | |
e8d31c20 | 379 | if (instruction_pointer(&kgdbts_regs) == addr) { |
974460c5 | 380 | eprintk("kgdbts: SingleStep failed at %lx\n", |
e8d31c20 JW |
381 | instruction_pointer(&kgdbts_regs)); |
382 | return 1; | |
383 | } | |
384 | ||
385 | return 0; | |
386 | } | |
387 | ||
388 | static void write_regs(char *arg) | |
389 | { | |
390 | memset(scratch_buf, 0, sizeof(scratch_buf)); | |
391 | scratch_buf[0] = 'G'; | |
392 | pt_regs_to_gdb_regs(kgdbts_gdb_regs, &kgdbts_regs); | |
393 | kgdb_mem2hex((char *)kgdbts_gdb_regs, &scratch_buf[1], NUMREGBYTES); | |
394 | fill_get_buf(scratch_buf); | |
395 | } | |
396 | ||
397 | static void skip_back_repeat_test(char *arg) | |
398 | { | |
399 | int go_back = simple_strtol(arg, NULL, 10); | |
400 | ||
401 | repeat_test--; | |
0296c248 | 402 | if (repeat_test <= 0) { |
e8d31c20 | 403 | ts.idx++; |
0296c248 DT |
404 | } else { |
405 | if (repeat_test % 100 == 0) | |
406 | v1printk("kgdbts:RUN ... %d remaining\n", repeat_test); | |
407 | ||
e8d31c20 | 408 | ts.idx -= go_back; |
0296c248 | 409 | } |
e8d31c20 JW |
410 | fill_get_buf(ts.tst[ts.idx].get); |
411 | } | |
412 | ||
413 | static int got_break(char *put_str, char *arg) | |
414 | { | |
415 | test_complete = 1; | |
416 | if (!strncmp(put_str+1, arg, 2)) { | |
417 | if (!strncmp(arg, "T0", 2)) | |
418 | test_complete = 2; | |
419 | return 0; | |
420 | } | |
421 | return 1; | |
422 | } | |
423 | ||
23bbd8e3 JW |
424 | static void get_cont_catch(char *arg) |
425 | { | |
426 | /* Always send detach because the test is completed at this point */ | |
427 | fill_get_buf("D"); | |
428 | } | |
429 | ||
430 | static int put_cont_catch(char *put_str, char *arg) | |
431 | { | |
432 | /* This is at the end of the test and we catch any and all input */ | |
433 | v2printk("kgdbts: cleanup task: %lx\n", sstep_thread_id); | |
434 | ts.idx--; | |
435 | return 0; | |
436 | } | |
437 | ||
438 | static int emul_reset(char *put_str, char *arg) | |
439 | { | |
440 | if (strncmp(put_str, "$OK", 3)) | |
441 | return 1; | |
442 | if (restart_from_top_after_write) { | |
443 | restart_from_top_after_write = 0; | |
444 | ts.idx = -1; | |
445 | } | |
446 | return 0; | |
447 | } | |
448 | ||
e8d31c20 JW |
449 | static void emul_sstep_get(char *arg) |
450 | { | |
451 | if (!arch_needs_sstep_emulation) { | |
486c5987 JW |
452 | if (cont_instead_of_sstep) { |
453 | cont_instead_of_sstep = 0; | |
454 | fill_get_buf("c"); | |
455 | } else { | |
456 | fill_get_buf(arg); | |
457 | } | |
e8d31c20 JW |
458 | return; |
459 | } | |
460 | switch (sstep_state) { | |
461 | case 0: | |
462 | v2printk("Emulate single step\n"); | |
463 | /* Start by looking at the current PC */ | |
464 | fill_get_buf("g"); | |
465 | break; | |
466 | case 1: | |
467 | /* set breakpoint */ | |
001fddf5 | 468 | break_helper("Z0", NULL, sstep_addr); |
e8d31c20 JW |
469 | break; |
470 | case 2: | |
471 | /* Continue */ | |
472 | fill_get_buf("c"); | |
473 | break; | |
474 | case 3: | |
475 | /* Clear breakpoint */ | |
001fddf5 | 476 | break_helper("z0", NULL, sstep_addr); |
e8d31c20 JW |
477 | break; |
478 | default: | |
974460c5 | 479 | eprintk("kgdbts: ERROR failed sstep get emulation\n"); |
e8d31c20 JW |
480 | } |
481 | sstep_state++; | |
482 | } | |
483 | ||
484 | static int emul_sstep_put(char *put_str, char *arg) | |
485 | { | |
486 | if (!arch_needs_sstep_emulation) { | |
486c5987 JW |
487 | char *ptr = &put_str[11]; |
488 | if (put_str[1] != 'T' || put_str[2] != '0') | |
489 | return 1; | |
490 | kgdb_hex2long(&ptr, &sstep_thread_id); | |
491 | return 0; | |
e8d31c20 JW |
492 | } |
493 | switch (sstep_state) { | |
494 | case 1: | |
495 | /* validate the "g" packet to get the IP */ | |
496 | kgdb_hex2mem(&put_str[1], (char *)kgdbts_gdb_regs, | |
497 | NUMREGBYTES); | |
498 | gdb_regs_to_pt_regs(kgdbts_gdb_regs, &kgdbts_regs); | |
499 | v2printk("Stopped at IP: %lx\n", | |
500 | instruction_pointer(&kgdbts_regs)); | |
501 | /* Want to stop at IP + break instruction size by default */ | |
23bbd8e3 | 502 | sstep_addr = cont_addr + BREAK_INSTR_SIZE; |
e8d31c20 JW |
503 | break; |
504 | case 2: | |
505 | if (strncmp(put_str, "$OK", 3)) { | |
974460c5 | 506 | eprintk("kgdbts: failed sstep break set\n"); |
e8d31c20 JW |
507 | return 1; |
508 | } | |
509 | break; | |
510 | case 3: | |
511 | if (strncmp(put_str, "$T0", 3)) { | |
974460c5 | 512 | eprintk("kgdbts: failed continue sstep\n"); |
e8d31c20 | 513 | return 1; |
23bbd8e3 JW |
514 | } else { |
515 | char *ptr = &put_str[11]; | |
516 | kgdb_hex2long(&ptr, &sstep_thread_id); | |
e8d31c20 JW |
517 | } |
518 | break; | |
519 | case 4: | |
520 | if (strncmp(put_str, "$OK", 3)) { | |
974460c5 | 521 | eprintk("kgdbts: failed sstep break unset\n"); |
e8d31c20 JW |
522 | return 1; |
523 | } | |
524 | /* Single step is complete so continue on! */ | |
525 | sstep_state = 0; | |
526 | return 0; | |
527 | default: | |
974460c5 | 528 | eprintk("kgdbts: ERROR failed sstep put emulation\n"); |
e8d31c20 JW |
529 | } |
530 | ||
531 | /* Continue on the same test line until emulation is complete */ | |
532 | ts.idx--; | |
533 | return 0; | |
534 | } | |
535 | ||
536 | static int final_ack_set(char *put_str, char *arg) | |
537 | { | |
538 | if (strncmp(put_str+1, arg, 2)) | |
539 | return 1; | |
540 | final_ack = 1; | |
541 | return 0; | |
542 | } | |
543 | /* | |
544 | * Test to plant a breakpoint and detach, which should clear out the | |
545 | * breakpoint and restore the original instruction. | |
546 | */ | |
547 | static struct test_struct plant_and_detach_test[] = { | |
548 | { "?", "S0*" }, /* Clear break points */ | |
549 | { "kgdbts_break_test", "OK", sw_break, }, /* set sw breakpoint */ | |
550 | { "D", "OK" }, /* Detach */ | |
551 | { "", "" }, | |
552 | }; | |
553 | ||
554 | /* | |
555 | * Simple test to write in a software breakpoint, check for the | |
556 | * correct stop location and detach. | |
557 | */ | |
558 | static struct test_struct sw_breakpoint_test[] = { | |
559 | { "?", "S0*" }, /* Clear break points */ | |
560 | { "kgdbts_break_test", "OK", sw_break, }, /* set sw breakpoint */ | |
561 | { "c", "T0*", }, /* Continue */ | |
001fddf5 | 562 | { "g", "kgdbts_break_test", NULL, check_and_rewind_pc }, |
e8d31c20 JW |
563 | { "write", "OK", write_regs }, |
564 | { "kgdbts_break_test", "OK", sw_rem_break }, /*remove breakpoint */ | |
565 | { "D", "OK" }, /* Detach */ | |
001fddf5 | 566 | { "D", "OK", NULL, got_break }, /* On success we made it here */ |
e8d31c20 JW |
567 | { "", "" }, |
568 | }; | |
569 | ||
570 | /* | |
571 | * Test a known bad memory read location to test the fault handler and | |
572 | * read bytes 1-8 at the bad address | |
573 | */ | |
574 | static struct test_struct bad_read_test[] = { | |
575 | { "?", "S0*" }, /* Clear break points */ | |
576 | { "m0,1", "E*" }, /* read 1 byte at address 1 */ | |
577 | { "m0,2", "E*" }, /* read 1 byte at address 2 */ | |
578 | { "m0,3", "E*" }, /* read 1 byte at address 3 */ | |
579 | { "m0,4", "E*" }, /* read 1 byte at address 4 */ | |
580 | { "m0,5", "E*" }, /* read 1 byte at address 5 */ | |
581 | { "m0,6", "E*" }, /* read 1 byte at address 6 */ | |
582 | { "m0,7", "E*" }, /* read 1 byte at address 7 */ | |
583 | { "m0,8", "E*" }, /* read 1 byte at address 8 */ | |
584 | { "D", "OK" }, /* Detach which removes all breakpoints and continues */ | |
585 | { "", "" }, | |
586 | }; | |
587 | ||
588 | /* | |
589 | * Test for hitting a breakpoint, remove it, single step, plant it | |
590 | * again and detach. | |
591 | */ | |
592 | static struct test_struct singlestep_break_test[] = { | |
593 | { "?", "S0*" }, /* Clear break points */ | |
594 | { "kgdbts_break_test", "OK", sw_break, }, /* set sw breakpoint */ | |
486c5987 JW |
595 | { "c", "T0*", NULL, get_thread_id_continue }, /* Continue */ |
596 | { "kgdbts_break_test", "OK", sw_rem_break }, /*remove breakpoint */ | |
001fddf5 | 597 | { "g", "kgdbts_break_test", NULL, check_and_rewind_pc }, |
e8d31c20 | 598 | { "write", "OK", write_regs }, /* Write registers */ |
e8d31c20 | 599 | { "s", "T0*", emul_sstep_get, emul_sstep_put }, /* Single step */ |
001fddf5 | 600 | { "g", "kgdbts_break_test", NULL, check_single_step }, |
e8d31c20 JW |
601 | { "kgdbts_break_test", "OK", sw_break, }, /* set sw breakpoint */ |
602 | { "c", "T0*", }, /* Continue */ | |
001fddf5 | 603 | { "g", "kgdbts_break_test", NULL, check_and_rewind_pc }, |
e8d31c20 JW |
604 | { "write", "OK", write_regs }, /* Write registers */ |
605 | { "D", "OK" }, /* Remove all breakpoints and continues */ | |
606 | { "", "" }, | |
607 | }; | |
608 | ||
609 | /* | |
f30897c1 | 610 | * Test for hitting a breakpoint at kernel_clone for what ever the number |
e8d31c20 JW |
611 | * of iterations required by the variable repeat_test. |
612 | */ | |
f30897c1 | 613 | static struct test_struct do_kernel_clone_test[] = { |
e8d31c20 | 614 | { "?", "S0*" }, /* Clear break points */ |
f30897c1 | 615 | { "kernel_clone", "OK", sw_break, }, /* set sw breakpoint */ |
486c5987 | 616 | { "c", "T0*", NULL, get_thread_id_continue }, /* Continue */ |
f30897c1 CB |
617 | { "kernel_clone", "OK", sw_rem_break }, /*remove breakpoint */ |
618 | { "g", "kernel_clone", NULL, check_and_rewind_pc }, /* check location */ | |
23bbd8e3 | 619 | { "write", "OK", write_regs, emul_reset }, /* Write registers */ |
e8d31c20 | 620 | { "s", "T0*", emul_sstep_get, emul_sstep_put }, /* Single step */ |
f30897c1 CB |
621 | { "g", "kernel_clone", NULL, check_single_step }, |
622 | { "kernel_clone", "OK", sw_break, }, /* set sw breakpoint */ | |
e8d31c20 | 623 | { "7", "T0*", skip_back_repeat_test }, /* Loop based on repeat_test */ |
001fddf5 | 624 | { "D", "OK", NULL, final_ack_set }, /* detach and unregister I/O */ |
23bbd8e3 | 625 | { "", "", get_cont_catch, put_cont_catch }, |
e8d31c20 JW |
626 | }; |
627 | ||
628 | /* Test for hitting a breakpoint at sys_open for what ever the number | |
629 | * of iterations required by the variable repeat_test. | |
630 | */ | |
631 | static struct test_struct sys_open_test[] = { | |
632 | { "?", "S0*" }, /* Clear break points */ | |
1114ab22 | 633 | { "do_sys_openat2", "OK", sw_break, }, /* set sw breakpoint */ |
486c5987 | 634 | { "c", "T0*", NULL, get_thread_id_continue }, /* Continue */ |
1114ab22 DT |
635 | { "do_sys_openat2", "OK", sw_rem_break }, /*remove breakpoint */ |
636 | { "g", "do_sys_openat2", NULL, check_and_rewind_pc }, /* check location */ | |
23bbd8e3 | 637 | { "write", "OK", write_regs, emul_reset }, /* Write registers */ |
e8d31c20 | 638 | { "s", "T0*", emul_sstep_get, emul_sstep_put }, /* Single step */ |
1114ab22 DT |
639 | { "g", "do_sys_openat2", NULL, check_single_step }, |
640 | { "do_sys_openat2", "OK", sw_break, }, /* set sw breakpoint */ | |
e8d31c20 | 641 | { "7", "T0*", skip_back_repeat_test }, /* Loop based on repeat_test */ |
001fddf5 | 642 | { "D", "OK", NULL, final_ack_set }, /* detach and unregister I/O */ |
23bbd8e3 | 643 | { "", "", get_cont_catch, put_cont_catch }, |
e8d31c20 JW |
644 | }; |
645 | ||
646 | /* | |
647 | * Test for hitting a simple hw breakpoint | |
648 | */ | |
649 | static struct test_struct hw_breakpoint_test[] = { | |
650 | { "?", "S0*" }, /* Clear break points */ | |
651 | { "kgdbts_break_test", "OK", hw_break, }, /* set hw breakpoint */ | |
652 | { "c", "T0*", }, /* Continue */ | |
001fddf5 | 653 | { "g", "kgdbts_break_test", NULL, check_and_rewind_pc }, |
e8d31c20 JW |
654 | { "write", "OK", write_regs }, |
655 | { "kgdbts_break_test", "OK", hw_rem_break }, /*remove breakpoint */ | |
656 | { "D", "OK" }, /* Detach */ | |
001fddf5 | 657 | { "D", "OK", NULL, got_break }, /* On success we made it here */ |
e8d31c20 JW |
658 | { "", "" }, |
659 | }; | |
660 | ||
661 | /* | |
662 | * Test for hitting a hw write breakpoint | |
663 | */ | |
664 | static struct test_struct hw_write_break_test[] = { | |
665 | { "?", "S0*" }, /* Clear break points */ | |
666 | { "hw_break_val", "OK", hw_write_break, }, /* set hw breakpoint */ | |
001fddf5 HH |
667 | { "c", "T0*", NULL, got_break }, /* Continue */ |
668 | { "g", "silent", NULL, check_and_rewind_pc }, | |
e8d31c20 JW |
669 | { "write", "OK", write_regs }, |
670 | { "hw_break_val", "OK", hw_rem_write_break }, /*remove breakpoint */ | |
671 | { "D", "OK" }, /* Detach */ | |
001fddf5 | 672 | { "D", "OK", NULL, got_break }, /* On success we made it here */ |
e8d31c20 JW |
673 | { "", "" }, |
674 | }; | |
675 | ||
676 | /* | |
677 | * Test for hitting a hw access breakpoint | |
678 | */ | |
679 | static struct test_struct hw_access_break_test[] = { | |
680 | { "?", "S0*" }, /* Clear break points */ | |
681 | { "hw_break_val", "OK", hw_access_break, }, /* set hw breakpoint */ | |
001fddf5 HH |
682 | { "c", "T0*", NULL, got_break }, /* Continue */ |
683 | { "g", "silent", NULL, check_and_rewind_pc }, | |
e8d31c20 JW |
684 | { "write", "OK", write_regs }, |
685 | { "hw_break_val", "OK", hw_rem_access_break }, /*remove breakpoint */ | |
686 | { "D", "OK" }, /* Detach */ | |
001fddf5 | 687 | { "D", "OK", NULL, got_break }, /* On success we made it here */ |
e8d31c20 JW |
688 | { "", "" }, |
689 | }; | |
690 | ||
691 | /* | |
692 | * Test for hitting a hw access breakpoint | |
693 | */ | |
694 | static struct test_struct nmi_sleep_test[] = { | |
695 | { "?", "S0*" }, /* Clear break points */ | |
001fddf5 | 696 | { "c", "T0*", NULL, got_break }, /* Continue */ |
e8d31c20 | 697 | { "D", "OK" }, /* Detach */ |
001fddf5 | 698 | { "D", "OK", NULL, got_break }, /* On success we made it here */ |
e8d31c20 JW |
699 | { "", "" }, |
700 | }; | |
701 | ||
702 | static void fill_get_buf(char *buf) | |
703 | { | |
704 | unsigned char checksum = 0; | |
705 | int count = 0; | |
706 | char ch; | |
707 | ||
708 | strcpy(get_buf, "$"); | |
709 | strcat(get_buf, buf); | |
710 | while ((ch = buf[count])) { | |
711 | checksum += ch; | |
712 | count++; | |
713 | } | |
714 | strcat(get_buf, "#"); | |
827e609b HH |
715 | get_buf[count + 2] = hex_asc_hi(checksum); |
716 | get_buf[count + 3] = hex_asc_lo(checksum); | |
e8d31c20 JW |
717 | get_buf[count + 4] = '\0'; |
718 | v2printk("get%i: %s\n", ts.idx, get_buf); | |
719 | } | |
720 | ||
721 | static int validate_simple_test(char *put_str) | |
722 | { | |
723 | char *chk_str; | |
724 | ||
725 | if (ts.tst[ts.idx].put_handler) | |
726 | return ts.tst[ts.idx].put_handler(put_str, | |
727 | ts.tst[ts.idx].put); | |
728 | ||
729 | chk_str = ts.tst[ts.idx].put; | |
730 | if (*put_str == '$') | |
731 | put_str++; | |
732 | ||
733 | while (*chk_str != '\0' && *put_str != '\0') { | |
734 | /* If someone does a * to match the rest of the string, allow | |
25985edc | 735 | * it, or stop if the received string is complete. |
e8d31c20 JW |
736 | */ |
737 | if (*put_str == '#' || *chk_str == '*') | |
738 | return 0; | |
739 | if (*put_str != *chk_str) | |
740 | return 1; | |
741 | ||
742 | chk_str++; | |
743 | put_str++; | |
744 | } | |
745 | if (*chk_str == '\0' && (*put_str == '\0' || *put_str == '#')) | |
746 | return 0; | |
747 | ||
748 | return 1; | |
749 | } | |
750 | ||
751 | static int run_simple_test(int is_get_char, int chr) | |
752 | { | |
753 | int ret = 0; | |
754 | if (is_get_char) { | |
755 | /* Send an ACK on the get if a prior put completed and set the | |
756 | * send ack variable | |
757 | */ | |
758 | if (send_ack) { | |
759 | send_ack = 0; | |
760 | return '+'; | |
761 | } | |
762 | /* On the first get char, fill the transmit buffer and then | |
763 | * take from the get_string. | |
764 | */ | |
765 | if (get_buf_cnt == 0) { | |
766 | if (ts.tst[ts.idx].get_handler) | |
767 | ts.tst[ts.idx].get_handler(ts.tst[ts.idx].get); | |
768 | else | |
769 | fill_get_buf(ts.tst[ts.idx].get); | |
770 | } | |
771 | ||
772 | if (get_buf[get_buf_cnt] == '\0') { | |
974460c5 | 773 | eprintk("kgdbts: ERROR GET: EOB on '%s' at %i\n", |
e8d31c20 JW |
774 | ts.name, ts.idx); |
775 | get_buf_cnt = 0; | |
776 | fill_get_buf("D"); | |
777 | } | |
778 | ret = get_buf[get_buf_cnt]; | |
779 | get_buf_cnt++; | |
780 | return ret; | |
781 | } | |
782 | ||
783 | /* This callback is a put char which is when kgdb sends data to | |
784 | * this I/O module. | |
785 | */ | |
23bbd8e3 JW |
786 | if (ts.tst[ts.idx].get[0] == '\0' && ts.tst[ts.idx].put[0] == '\0' && |
787 | !ts.tst[ts.idx].get_handler) { | |
974460c5 | 788 | eprintk("kgdbts: ERROR: beyond end of test on" |
e8d31c20 JW |
789 | " '%s' line %i\n", ts.name, ts.idx); |
790 | return 0; | |
791 | } | |
792 | ||
793 | if (put_buf_cnt >= BUFMAX) { | |
974460c5 | 794 | eprintk("kgdbts: ERROR: put buffer overflow on" |
e8d31c20 JW |
795 | " '%s' line %i\n", ts.name, ts.idx); |
796 | put_buf_cnt = 0; | |
797 | return 0; | |
798 | } | |
799 | /* Ignore everything until the first valid packet start '$' */ | |
800 | if (put_buf_cnt == 0 && chr != '$') | |
801 | return 0; | |
802 | ||
803 | put_buf[put_buf_cnt] = chr; | |
804 | put_buf_cnt++; | |
805 | ||
806 | /* End of packet == #XX so look for the '#' */ | |
807 | if (put_buf_cnt > 3 && put_buf[put_buf_cnt - 3] == '#') { | |
b4f1b67b RK |
808 | if (put_buf_cnt >= BUFMAX) { |
809 | eprintk("kgdbts: ERROR: put buffer overflow on" | |
810 | " '%s' line %i\n", ts.name, ts.idx); | |
811 | put_buf_cnt = 0; | |
812 | return 0; | |
813 | } | |
e8d31c20 JW |
814 | put_buf[put_buf_cnt] = '\0'; |
815 | v2printk("put%i: %s\n", ts.idx, put_buf); | |
816 | /* Trigger check here */ | |
817 | if (ts.validate_put && ts.validate_put(put_buf)) { | |
974460c5 | 818 | eprintk("kgdbts: ERROR PUT: end of test " |
e8d31c20 JW |
819 | "buffer on '%s' line %i expected %s got %s\n", |
820 | ts.name, ts.idx, ts.tst[ts.idx].put, put_buf); | |
821 | } | |
822 | ts.idx++; | |
823 | put_buf_cnt = 0; | |
824 | get_buf_cnt = 0; | |
825 | send_ack = 1; | |
826 | } | |
827 | return 0; | |
828 | } | |
829 | ||
830 | static void init_simple_test(void) | |
831 | { | |
832 | memset(&ts, 0, sizeof(ts)); | |
833 | ts.run_test = run_simple_test; | |
834 | ts.validate_put = validate_simple_test; | |
835 | } | |
836 | ||
837 | static void run_plant_and_detach_test(int is_early) | |
838 | { | |
839 | char before[BREAK_INSTR_SIZE]; | |
840 | char after[BREAK_INSTR_SIZE]; | |
841 | ||
fe557319 | 842 | copy_from_kernel_nofault(before, (char *)kgdbts_break_test, |
e8d31c20 JW |
843 | BREAK_INSTR_SIZE); |
844 | init_simple_test(); | |
845 | ts.tst = plant_and_detach_test; | |
846 | ts.name = "plant_and_detach_test"; | |
847 | /* Activate test with initial breakpoint */ | |
848 | if (!is_early) | |
849 | kgdb_breakpoint(); | |
fe557319 CH |
850 | copy_from_kernel_nofault(after, (char *)kgdbts_break_test, |
851 | BREAK_INSTR_SIZE); | |
e8d31c20 JW |
852 | if (memcmp(before, after, BREAK_INSTR_SIZE)) { |
853 | printk(KERN_CRIT "kgdbts: ERROR kgdb corrupted memory\n"); | |
854 | panic("kgdb memory corruption"); | |
855 | } | |
856 | ||
857 | /* complete the detach test */ | |
858 | if (!is_early) | |
859 | kgdbts_break_test(); | |
860 | } | |
861 | ||
862 | static void run_breakpoint_test(int is_hw_breakpoint) | |
863 | { | |
864 | test_complete = 0; | |
865 | init_simple_test(); | |
866 | if (is_hw_breakpoint) { | |
867 | ts.tst = hw_breakpoint_test; | |
868 | ts.name = "hw_breakpoint_test"; | |
869 | } else { | |
870 | ts.tst = sw_breakpoint_test; | |
871 | ts.name = "sw_breakpoint_test"; | |
872 | } | |
873 | /* Activate test with initial breakpoint */ | |
874 | kgdb_breakpoint(); | |
875 | /* run code with the break point in it */ | |
876 | kgdbts_break_test(); | |
877 | kgdb_breakpoint(); | |
878 | ||
879 | if (test_complete) | |
880 | return; | |
881 | ||
974460c5 | 882 | eprintk("kgdbts: ERROR %s test failed\n", ts.name); |
b33cb815 JW |
883 | if (is_hw_breakpoint) |
884 | hwbreaks_ok = 0; | |
e8d31c20 JW |
885 | } |
886 | ||
887 | static void run_hw_break_test(int is_write_test) | |
888 | { | |
889 | test_complete = 0; | |
890 | init_simple_test(); | |
891 | if (is_write_test) { | |
892 | ts.tst = hw_write_break_test; | |
893 | ts.name = "hw_write_break_test"; | |
894 | } else { | |
895 | ts.tst = hw_access_break_test; | |
896 | ts.name = "hw_access_break_test"; | |
897 | } | |
898 | /* Activate test with initial breakpoint */ | |
899 | kgdb_breakpoint(); | |
900 | hw_break_val_access(); | |
901 | if (is_write_test) { | |
b33cb815 | 902 | if (test_complete == 2) { |
974460c5 | 903 | eprintk("kgdbts: ERROR %s broke on access\n", |
e8d31c20 | 904 | ts.name); |
b33cb815 JW |
905 | hwbreaks_ok = 0; |
906 | } | |
e8d31c20 JW |
907 | hw_break_val_write(); |
908 | } | |
909 | kgdb_breakpoint(); | |
910 | ||
911 | if (test_complete == 1) | |
912 | return; | |
913 | ||
974460c5 | 914 | eprintk("kgdbts: ERROR %s test failed\n", ts.name); |
b33cb815 | 915 | hwbreaks_ok = 0; |
e8d31c20 JW |
916 | } |
917 | ||
918 | static void run_nmi_sleep_test(int nmi_sleep) | |
919 | { | |
920 | unsigned long flags; | |
921 | ||
922 | init_simple_test(); | |
923 | ts.tst = nmi_sleep_test; | |
924 | ts.name = "nmi_sleep_test"; | |
925 | /* Activate test with initial breakpoint */ | |
926 | kgdb_breakpoint(); | |
927 | local_irq_save(flags); | |
928 | mdelay(nmi_sleep*1000); | |
929 | touch_nmi_watchdog(); | |
930 | local_irq_restore(flags); | |
931 | if (test_complete != 2) | |
974460c5 | 932 | eprintk("kgdbts: ERROR nmi_test did not hit nmi\n"); |
e8d31c20 JW |
933 | kgdb_breakpoint(); |
934 | if (test_complete == 1) | |
935 | return; | |
936 | ||
974460c5 | 937 | eprintk("kgdbts: ERROR %s test failed\n", ts.name); |
e8d31c20 JW |
938 | } |
939 | ||
940 | static void run_bad_read_test(void) | |
941 | { | |
942 | init_simple_test(); | |
943 | ts.tst = bad_read_test; | |
944 | ts.name = "bad_read_test"; | |
945 | /* Activate test with initial breakpoint */ | |
946 | kgdb_breakpoint(); | |
947 | } | |
948 | ||
f30897c1 | 949 | static void run_kernel_clone_test(void) |
e8d31c20 JW |
950 | { |
951 | init_simple_test(); | |
f30897c1 CB |
952 | ts.tst = do_kernel_clone_test; |
953 | ts.name = "do_kernel_clone_test"; | |
e8d31c20 JW |
954 | /* Activate test with initial breakpoint */ |
955 | kgdb_breakpoint(); | |
956 | } | |
957 | ||
958 | static void run_sys_open_test(void) | |
959 | { | |
960 | init_simple_test(); | |
961 | ts.tst = sys_open_test; | |
962 | ts.name = "sys_open_test"; | |
963 | /* Activate test with initial breakpoint */ | |
964 | kgdb_breakpoint(); | |
965 | } | |
966 | ||
967 | static void run_singlestep_break_test(void) | |
968 | { | |
969 | init_simple_test(); | |
970 | ts.tst = singlestep_break_test; | |
971 | ts.name = "singlestep_breakpoint_test"; | |
972 | /* Activate test with initial breakpoint */ | |
973 | kgdb_breakpoint(); | |
974 | kgdbts_break_test(); | |
975 | kgdbts_break_test(); | |
976 | } | |
977 | ||
978 | static void kgdbts_run_tests(void) | |
979 | { | |
980 | char *ptr; | |
f30897c1 | 981 | int clone_test = 0; |
001fddf5 | 982 | int do_sys_open_test = 0; |
7cfcd985 | 983 | int sstep_test = 1000; |
e8d31c20 | 984 | int nmi_sleep = 0; |
7cfcd985 | 985 | int i; |
e8d31c20 | 986 | |
fa0218ef LA |
987 | verbose = 0; |
988 | if (strstr(config, "V1")) | |
989 | verbose = 1; | |
990 | if (strstr(config, "V2")) | |
991 | verbose = 2; | |
992 | ||
59d309f9 | 993 | ptr = strchr(config, 'F'); |
e8d31c20 | 994 | if (ptr) |
f30897c1 | 995 | clone_test = simple_strtol(ptr + 1, NULL, 10); |
59d309f9 | 996 | ptr = strchr(config, 'S'); |
e8d31c20 | 997 | if (ptr) |
001fddf5 | 998 | do_sys_open_test = simple_strtol(ptr + 1, NULL, 10); |
59d309f9 | 999 | ptr = strchr(config, 'N'); |
e8d31c20 JW |
1000 | if (ptr) |
1001 | nmi_sleep = simple_strtol(ptr+1, NULL, 10); | |
59d309f9 | 1002 | ptr = strchr(config, 'I'); |
7cfcd985 JW |
1003 | if (ptr) |
1004 | sstep_test = simple_strtol(ptr+1, NULL, 10); | |
e8d31c20 | 1005 | |
456ca7ff JW |
1006 | /* All HW break point tests */ |
1007 | if (arch_kgdb_ops.flags & KGDB_HW_BREAKPOINT) { | |
1008 | hwbreaks_ok = 1; | |
1009 | v1printk("kgdbts:RUN hw breakpoint test\n"); | |
1010 | run_breakpoint_test(1); | |
1011 | v1printk("kgdbts:RUN hw write breakpoint test\n"); | |
1012 | run_hw_break_test(1); | |
1013 | v1printk("kgdbts:RUN access write breakpoint test\n"); | |
1014 | run_hw_break_test(0); | |
1015 | } | |
456ca7ff | 1016 | |
e8d31c20 JW |
1017 | /* required internal KGDB tests */ |
1018 | v1printk("kgdbts:RUN plant and detach test\n"); | |
1019 | run_plant_and_detach_test(0); | |
1020 | v1printk("kgdbts:RUN sw breakpoint test\n"); | |
1021 | run_breakpoint_test(0); | |
1022 | v1printk("kgdbts:RUN bad memory access test\n"); | |
1023 | run_bad_read_test(); | |
7cfcd985 JW |
1024 | v1printk("kgdbts:RUN singlestep test %i iterations\n", sstep_test); |
1025 | for (i = 0; i < sstep_test; i++) { | |
1026 | run_singlestep_break_test(); | |
1027 | if (i % 100 == 0) | |
1028 | v1printk("kgdbts:RUN singlestep [%i/%i]\n", | |
1029 | i, sstep_test); | |
1030 | } | |
e8d31c20 JW |
1031 | |
1032 | /* ===Optional tests=== */ | |
1033 | ||
e8d31c20 JW |
1034 | if (nmi_sleep) { |
1035 | v1printk("kgdbts:RUN NMI sleep %i seconds test\n", nmi_sleep); | |
1036 | run_nmi_sleep_test(nmi_sleep); | |
1037 | } | |
1038 | ||
f30897c1 | 1039 | /* If the kernel_clone test is run it will be the last test that is |
e8d31c20 JW |
1040 | * executed because a kernel thread will be spawned at the very |
1041 | * end to unregister the debug hooks. | |
1042 | */ | |
f30897c1 CB |
1043 | if (clone_test) { |
1044 | repeat_test = clone_test; | |
1045 | printk(KERN_INFO "kgdbts:RUN kernel_clone for %i breakpoints\n", | |
e8d31c20 | 1046 | repeat_test); |
001fddf5 | 1047 | kthread_run(kgdbts_unreg_thread, NULL, "kgdbts_unreg"); |
f30897c1 | 1048 | run_kernel_clone_test(); |
e8d31c20 JW |
1049 | return; |
1050 | } | |
1051 | ||
1052 | /* If the sys_open test is run it will be the last test that is | |
1053 | * executed because a kernel thread will be spawned at the very | |
1054 | * end to unregister the debug hooks. | |
1055 | */ | |
001fddf5 HH |
1056 | if (do_sys_open_test) { |
1057 | repeat_test = do_sys_open_test; | |
e8d31c20 JW |
1058 | printk(KERN_INFO "kgdbts:RUN sys_open for %i breakpoints\n", |
1059 | repeat_test); | |
001fddf5 | 1060 | kthread_run(kgdbts_unreg_thread, NULL, "kgdbts_unreg"); |
e8d31c20 JW |
1061 | run_sys_open_test(); |
1062 | return; | |
1063 | } | |
1064 | /* Shutdown and unregister */ | |
1065 | kgdb_unregister_io_module(&kgdbts_io_ops); | |
1066 | configured = 0; | |
1067 | } | |
1068 | ||
1069 | static int kgdbts_option_setup(char *opt) | |
1070 | { | |
adb4b83c | 1071 | if (strlen(opt) >= MAX_CONFIG_LEN) { |
e8d31c20 JW |
1072 | printk(KERN_ERR "kgdbts: config string too long\n"); |
1073 | return -ENOSPC; | |
1074 | } | |
1075 | strcpy(config, opt); | |
e8d31c20 JW |
1076 | return 0; |
1077 | } | |
1078 | ||
1079 | __setup("kgdbts=", kgdbts_option_setup); | |
1080 | ||
1081 | static int configure_kgdbts(void) | |
1082 | { | |
1083 | int err = 0; | |
1084 | ||
1085 | if (!strlen(config) || isspace(config[0])) | |
1086 | goto noconfig; | |
e8d31c20 JW |
1087 | |
1088 | final_ack = 0; | |
1089 | run_plant_and_detach_test(1); | |
1090 | ||
1091 | err = kgdb_register_io_module(&kgdbts_io_ops); | |
1092 | if (err) { | |
1093 | configured = 0; | |
1094 | return err; | |
1095 | } | |
1096 | configured = 1; | |
1097 | kgdbts_run_tests(); | |
1098 | ||
1099 | return err; | |
1100 | ||
1101 | noconfig: | |
1102 | config[0] = 0; | |
1103 | configured = 0; | |
1104 | ||
1105 | return err; | |
1106 | } | |
1107 | ||
1108 | static int __init init_kgdbts(void) | |
1109 | { | |
1110 | /* Already configured? */ | |
1111 | if (configured == 1) | |
1112 | return 0; | |
1113 | ||
1114 | return configure_kgdbts(); | |
1115 | } | |
67dd339c | 1116 | device_initcall(init_kgdbts); |
e8d31c20 | 1117 | |
e8d31c20 JW |
1118 | static int kgdbts_get_char(void) |
1119 | { | |
1120 | int val = 0; | |
1121 | ||
1122 | if (ts.run_test) | |
1123 | val = ts.run_test(1, 0); | |
1124 | ||
1125 | return val; | |
1126 | } | |
1127 | ||
1128 | static void kgdbts_put_char(u8 chr) | |
1129 | { | |
1130 | if (ts.run_test) | |
1131 | ts.run_test(0, chr); | |
1132 | } | |
1133 | ||
e4dca7b7 KC |
1134 | static int param_set_kgdbts_var(const char *kmessage, |
1135 | const struct kernel_param *kp) | |
e8d31c20 | 1136 | { |
b281218a | 1137 | size_t len = strlen(kmessage); |
e8d31c20 JW |
1138 | |
1139 | if (len >= MAX_CONFIG_LEN) { | |
1140 | printk(KERN_ERR "kgdbts: config string too long\n"); | |
1141 | return -ENOSPC; | |
1142 | } | |
1143 | ||
1144 | /* Only copy in the string if the init function has not run yet */ | |
1145 | if (configured < 0) { | |
1146 | strcpy(config, kmessage); | |
1147 | return 0; | |
1148 | } | |
1149 | ||
4dacd5c0 DD |
1150 | if (configured == 1) { |
1151 | printk(KERN_ERR "kgdbts: ERROR: Already configured and running.\n"); | |
e8d31c20 JW |
1152 | return -EBUSY; |
1153 | } | |
1154 | ||
1155 | strcpy(config, kmessage); | |
1156 | /* Chop out \n char as a result of echo */ | |
b281218a | 1157 | if (len && config[len - 1] == '\n') |
e8d31c20 JW |
1158 | config[len - 1] = '\0'; |
1159 | ||
e8d31c20 JW |
1160 | /* Go and configure with the new params. */ |
1161 | return configure_kgdbts(); | |
1162 | } | |
1163 | ||
1164 | static void kgdbts_pre_exp_handler(void) | |
1165 | { | |
1166 | /* Increment the module count when the debugger is active */ | |
1167 | if (!kgdb_connected) | |
1168 | try_module_get(THIS_MODULE); | |
1169 | } | |
1170 | ||
1171 | static void kgdbts_post_exp_handler(void) | |
1172 | { | |
1173 | /* decrement the module count when the debugger detaches */ | |
1174 | if (!kgdb_connected) | |
1175 | module_put(THIS_MODULE); | |
1176 | } | |
1177 | ||
1178 | static struct kgdb_io kgdbts_io_ops = { | |
1179 | .name = "kgdbts", | |
1180 | .read_char = kgdbts_get_char, | |
1181 | .write_char = kgdbts_put_char, | |
1182 | .pre_exception = kgdbts_pre_exp_handler, | |
1183 | .post_exception = kgdbts_post_exp_handler, | |
1184 | }; | |
1185 | ||
67dd339c PG |
1186 | /* |
1187 | * not really modular, but the easiest way to keep compat with existing | |
1188 | * bootargs behaviour is to continue using module_param here. | |
1189 | */ | |
e8d31c20 JW |
1190 | module_param_call(kgdbts, param_set_kgdbts_var, param_get_string, &kps, 0644); |
1191 | MODULE_PARM_DESC(kgdbts, "<A|V1|V2>[F#|S#][N#]"); |