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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 { \ | |
104 | if (verbose > 1) \ | |
105 | printk(KERN_INFO a); \ | |
106 | touch_nmi_watchdog(); \ | |
107 | } while (0) | |
108 | #define eprintk(a...) do { \ | |
109 | printk(KERN_ERR a); \ | |
110 | WARN_ON(1); \ | |
111 | } while (0) | |
e8d31c20 JW |
112 | #define MAX_CONFIG_LEN 40 |
113 | ||
e8d31c20 JW |
114 | static struct kgdb_io kgdbts_io_ops; |
115 | static char get_buf[BUFMAX]; | |
116 | static int get_buf_cnt; | |
117 | static char put_buf[BUFMAX]; | |
118 | static int put_buf_cnt; | |
119 | static char scratch_buf[BUFMAX]; | |
120 | static int verbose; | |
121 | static int repeat_test; | |
122 | static int test_complete; | |
123 | static int send_ack; | |
124 | static int final_ack; | |
b33cb815 JW |
125 | static int force_hwbrks; |
126 | static int hwbreaks_ok; | |
e8d31c20 JW |
127 | static int hw_break_val; |
128 | static int hw_break_val2; | |
486c5987 JW |
129 | static int cont_instead_of_sstep; |
130 | static unsigned long cont_thread_id; | |
131 | static unsigned long sstep_thread_id; | |
4d7ffa49 | 132 | #if defined(CONFIG_ARM) || defined(CONFIG_MIPS) || defined(CONFIG_SPARC) |
e8d31c20 JW |
133 | static int arch_needs_sstep_emulation = 1; |
134 | #else | |
135 | static int arch_needs_sstep_emulation; | |
136 | #endif | |
23bbd8e3 | 137 | static unsigned long cont_addr; |
e8d31c20 | 138 | static unsigned long sstep_addr; |
23bbd8e3 | 139 | static int restart_from_top_after_write; |
e8d31c20 JW |
140 | static int sstep_state; |
141 | ||
142 | /* Storage for the registers, in GDB format. */ | |
143 | static unsigned long kgdbts_gdb_regs[(NUMREGBYTES + | |
144 | sizeof(unsigned long) - 1) / | |
145 | sizeof(unsigned long)]; | |
146 | static struct pt_regs kgdbts_regs; | |
147 | ||
148 | /* -1 = init not run yet, 0 = unconfigured, 1 = configured. */ | |
149 | static int configured = -1; | |
150 | ||
974460c5 JW |
151 | #ifdef CONFIG_KGDB_TESTS_BOOT_STRING |
152 | static char config[MAX_CONFIG_LEN] = CONFIG_KGDB_TESTS_BOOT_STRING; | |
153 | #else | |
e8d31c20 | 154 | static char config[MAX_CONFIG_LEN]; |
974460c5 | 155 | #endif |
e8d31c20 JW |
156 | static struct kparam_string kps = { |
157 | .string = config, | |
158 | .maxlen = MAX_CONFIG_LEN, | |
159 | }; | |
160 | ||
161 | static void fill_get_buf(char *buf); | |
162 | ||
163 | struct test_struct { | |
164 | char *get; | |
165 | char *put; | |
166 | void (*get_handler)(char *); | |
167 | int (*put_handler)(char *, char *); | |
168 | }; | |
169 | ||
170 | struct test_state { | |
171 | char *name; | |
172 | struct test_struct *tst; | |
173 | int idx; | |
174 | int (*run_test) (int, int); | |
175 | int (*validate_put) (char *); | |
176 | }; | |
177 | ||
178 | static struct test_state ts; | |
179 | ||
180 | static int kgdbts_unreg_thread(void *ptr) | |
181 | { | |
182 | /* Wait until the tests are complete and then ungresiter the I/O | |
183 | * driver. | |
184 | */ | |
185 | while (!final_ack) | |
186 | msleep_interruptible(1500); | |
23bbd8e3 JW |
187 | /* Pause for any other threads to exit after final ack. */ |
188 | msleep_interruptible(1000); | |
e8d31c20 JW |
189 | if (configured) |
190 | kgdb_unregister_io_module(&kgdbts_io_ops); | |
191 | configured = 0; | |
192 | ||
193 | return 0; | |
194 | } | |
195 | ||
196 | /* This is noinline such that it can be used for a single location to | |
197 | * place a breakpoint | |
198 | */ | |
199 | static noinline void kgdbts_break_test(void) | |
200 | { | |
201 | v2printk("kgdbts: breakpoint complete\n"); | |
202 | } | |
203 | ||
1114ab22 DT |
204 | /* |
205 | * This is a cached wrapper for kallsyms_lookup_name(). | |
206 | * | |
207 | * The cache is a big win for several tests. For example it more the doubles | |
208 | * the cycles per second during the sys_open test. This is not theoretic, | |
209 | * the performance improvement shows up at human scale, especially when | |
210 | * testing using emulators. | |
211 | * | |
212 | * Obviously neither re-entrant nor thread-safe but that is OK since it | |
213 | * can only be called from the debug trap (and therefore all other CPUs | |
214 | * are halted). | |
215 | */ | |
e8d31c20 JW |
216 | static unsigned long lookup_addr(char *arg) |
217 | { | |
1114ab22 DT |
218 | static char cached_arg[KSYM_NAME_LEN]; |
219 | static unsigned long cached_addr; | |
220 | ||
221 | if (strcmp(arg, cached_arg)) { | |
222 | strscpy(cached_arg, arg, KSYM_NAME_LEN); | |
223 | cached_addr = kallsyms_lookup_name(arg); | |
224 | } | |
225 | ||
226 | return (unsigned long)dereference_function_descriptor( | |
227 | (void *)cached_addr); | |
e8d31c20 JW |
228 | } |
229 | ||
230 | static void break_helper(char *bp_type, char *arg, unsigned long vaddr) | |
231 | { | |
232 | unsigned long addr; | |
233 | ||
234 | if (arg) | |
235 | addr = lookup_addr(arg); | |
236 | else | |
237 | addr = vaddr; | |
238 | ||
239 | sprintf(scratch_buf, "%s,%lx,%i", bp_type, addr, | |
240 | BREAK_INSTR_SIZE); | |
241 | fill_get_buf(scratch_buf); | |
242 | } | |
243 | ||
244 | static void sw_break(char *arg) | |
245 | { | |
b33cb815 | 246 | break_helper(force_hwbrks ? "Z1" : "Z0", arg, 0); |
e8d31c20 JW |
247 | } |
248 | ||
249 | static void sw_rem_break(char *arg) | |
250 | { | |
b33cb815 | 251 | break_helper(force_hwbrks ? "z1" : "z0", arg, 0); |
e8d31c20 JW |
252 | } |
253 | ||
254 | static void hw_break(char *arg) | |
255 | { | |
256 | break_helper("Z1", arg, 0); | |
257 | } | |
258 | ||
259 | static void hw_rem_break(char *arg) | |
260 | { | |
261 | break_helper("z1", arg, 0); | |
262 | } | |
263 | ||
264 | static void hw_write_break(char *arg) | |
265 | { | |
266 | break_helper("Z2", arg, 0); | |
267 | } | |
268 | ||
269 | static void hw_rem_write_break(char *arg) | |
270 | { | |
271 | break_helper("z2", arg, 0); | |
272 | } | |
273 | ||
274 | static void hw_access_break(char *arg) | |
275 | { | |
276 | break_helper("Z4", arg, 0); | |
277 | } | |
278 | ||
279 | static void hw_rem_access_break(char *arg) | |
280 | { | |
281 | break_helper("z4", arg, 0); | |
282 | } | |
283 | ||
284 | static void hw_break_val_access(void) | |
285 | { | |
286 | hw_break_val2 = hw_break_val; | |
287 | } | |
288 | ||
289 | static void hw_break_val_write(void) | |
290 | { | |
291 | hw_break_val++; | |
292 | } | |
293 | ||
486c5987 JW |
294 | static int get_thread_id_continue(char *put_str, char *arg) |
295 | { | |
296 | char *ptr = &put_str[11]; | |
297 | ||
298 | if (put_str[1] != 'T' || put_str[2] != '0') | |
299 | return 1; | |
300 | kgdb_hex2long(&ptr, &cont_thread_id); | |
301 | return 0; | |
302 | } | |
303 | ||
e8d31c20 JW |
304 | static int check_and_rewind_pc(char *put_str, char *arg) |
305 | { | |
306 | unsigned long addr = lookup_addr(arg); | |
63ab25eb | 307 | unsigned long ip; |
e8d31c20 JW |
308 | int offset = 0; |
309 | ||
310 | kgdb_hex2mem(&put_str[1], (char *)kgdbts_gdb_regs, | |
311 | NUMREGBYTES); | |
312 | gdb_regs_to_pt_regs(kgdbts_gdb_regs, &kgdbts_regs); | |
63ab25eb MF |
313 | ip = instruction_pointer(&kgdbts_regs); |
314 | v2printk("Stopped at IP: %lx\n", ip); | |
315 | #ifdef GDB_ADJUSTS_BREAK_OFFSET | |
316 | /* On some arches, a breakpoint stop requires it to be decremented */ | |
317 | if (addr + BREAK_INSTR_SIZE == ip) | |
318 | offset = -BREAK_INSTR_SIZE; | |
e8d31c20 | 319 | #endif |
23bbd8e3 JW |
320 | |
321 | if (arch_needs_sstep_emulation && sstep_addr && | |
322 | ip + offset == sstep_addr && | |
1114ab22 | 323 | ((!strcmp(arg, "do_sys_openat2") || !strcmp(arg, "kernel_clone")))) { |
23bbd8e3 JW |
324 | /* This is special case for emulated single step */ |
325 | v2printk("Emul: rewind hit single step bp\n"); | |
326 | restart_from_top_after_write = 1; | |
327 | } else if (strcmp(arg, "silent") && ip + offset != addr) { | |
974460c5 | 328 | eprintk("kgdbts: BP mismatch %lx expected %lx\n", |
63ab25eb | 329 | ip + offset, addr); |
e8d31c20 JW |
330 | return 1; |
331 | } | |
63ab25eb | 332 | /* Readjust the instruction pointer if needed */ |
603d04b2 | 333 | ip += offset; |
23bbd8e3 | 334 | cont_addr = ip; |
603d04b2 MF |
335 | #ifdef GDB_ADJUSTS_BREAK_OFFSET |
336 | instruction_pointer_set(&kgdbts_regs, ip); | |
337 | #endif | |
e8d31c20 JW |
338 | return 0; |
339 | } | |
340 | ||
341 | static int check_single_step(char *put_str, char *arg) | |
342 | { | |
343 | unsigned long addr = lookup_addr(arg); | |
23bbd8e3 JW |
344 | static int matched_id; |
345 | ||
e8d31c20 JW |
346 | /* |
347 | * From an arch indepent point of view the instruction pointer | |
348 | * should be on a different instruction | |
349 | */ | |
350 | kgdb_hex2mem(&put_str[1], (char *)kgdbts_gdb_regs, | |
351 | NUMREGBYTES); | |
352 | gdb_regs_to_pt_regs(kgdbts_gdb_regs, &kgdbts_regs); | |
353 | v2printk("Singlestep stopped at IP: %lx\n", | |
354 | instruction_pointer(&kgdbts_regs)); | |
486c5987 | 355 | |
23bbd8e3 | 356 | if (sstep_thread_id != cont_thread_id) { |
486c5987 JW |
357 | /* |
358 | * Ensure we stopped in the same thread id as before, else the | |
359 | * debugger should continue until the original thread that was | |
360 | * single stepped is scheduled again, emulating gdb's behavior. | |
361 | */ | |
362 | v2printk("ThrID does not match: %lx\n", cont_thread_id); | |
23bbd8e3 JW |
363 | if (arch_needs_sstep_emulation) { |
364 | if (matched_id && | |
365 | instruction_pointer(&kgdbts_regs) != addr) | |
366 | goto continue_test; | |
367 | matched_id++; | |
368 | ts.idx -= 2; | |
369 | sstep_state = 0; | |
370 | return 0; | |
371 | } | |
486c5987 JW |
372 | cont_instead_of_sstep = 1; |
373 | ts.idx -= 4; | |
374 | return 0; | |
375 | } | |
23bbd8e3 JW |
376 | continue_test: |
377 | matched_id = 0; | |
e8d31c20 | 378 | if (instruction_pointer(&kgdbts_regs) == addr) { |
974460c5 | 379 | eprintk("kgdbts: SingleStep failed at %lx\n", |
e8d31c20 JW |
380 | instruction_pointer(&kgdbts_regs)); |
381 | return 1; | |
382 | } | |
383 | ||
384 | return 0; | |
385 | } | |
386 | ||
387 | static void write_regs(char *arg) | |
388 | { | |
389 | memset(scratch_buf, 0, sizeof(scratch_buf)); | |
390 | scratch_buf[0] = 'G'; | |
391 | pt_regs_to_gdb_regs(kgdbts_gdb_regs, &kgdbts_regs); | |
392 | kgdb_mem2hex((char *)kgdbts_gdb_regs, &scratch_buf[1], NUMREGBYTES); | |
393 | fill_get_buf(scratch_buf); | |
394 | } | |
395 | ||
396 | static void skip_back_repeat_test(char *arg) | |
397 | { | |
398 | int go_back = simple_strtol(arg, NULL, 10); | |
399 | ||
400 | repeat_test--; | |
0296c248 | 401 | if (repeat_test <= 0) { |
e8d31c20 | 402 | ts.idx++; |
0296c248 DT |
403 | } else { |
404 | if (repeat_test % 100 == 0) | |
405 | v1printk("kgdbts:RUN ... %d remaining\n", repeat_test); | |
406 | ||
e8d31c20 | 407 | ts.idx -= go_back; |
0296c248 | 408 | } |
e8d31c20 JW |
409 | fill_get_buf(ts.tst[ts.idx].get); |
410 | } | |
411 | ||
412 | static int got_break(char *put_str, char *arg) | |
413 | { | |
414 | test_complete = 1; | |
415 | if (!strncmp(put_str+1, arg, 2)) { | |
416 | if (!strncmp(arg, "T0", 2)) | |
417 | test_complete = 2; | |
418 | return 0; | |
419 | } | |
420 | return 1; | |
421 | } | |
422 | ||
23bbd8e3 JW |
423 | static void get_cont_catch(char *arg) |
424 | { | |
425 | /* Always send detach because the test is completed at this point */ | |
426 | fill_get_buf("D"); | |
427 | } | |
428 | ||
429 | static int put_cont_catch(char *put_str, char *arg) | |
430 | { | |
431 | /* This is at the end of the test and we catch any and all input */ | |
432 | v2printk("kgdbts: cleanup task: %lx\n", sstep_thread_id); | |
433 | ts.idx--; | |
434 | return 0; | |
435 | } | |
436 | ||
437 | static int emul_reset(char *put_str, char *arg) | |
438 | { | |
439 | if (strncmp(put_str, "$OK", 3)) | |
440 | return 1; | |
441 | if (restart_from_top_after_write) { | |
442 | restart_from_top_after_write = 0; | |
443 | ts.idx = -1; | |
444 | } | |
445 | return 0; | |
446 | } | |
447 | ||
e8d31c20 JW |
448 | static void emul_sstep_get(char *arg) |
449 | { | |
450 | if (!arch_needs_sstep_emulation) { | |
486c5987 JW |
451 | if (cont_instead_of_sstep) { |
452 | cont_instead_of_sstep = 0; | |
453 | fill_get_buf("c"); | |
454 | } else { | |
455 | fill_get_buf(arg); | |
456 | } | |
e8d31c20 JW |
457 | return; |
458 | } | |
459 | switch (sstep_state) { | |
460 | case 0: | |
461 | v2printk("Emulate single step\n"); | |
462 | /* Start by looking at the current PC */ | |
463 | fill_get_buf("g"); | |
464 | break; | |
465 | case 1: | |
466 | /* set breakpoint */ | |
001fddf5 | 467 | break_helper("Z0", NULL, sstep_addr); |
e8d31c20 JW |
468 | break; |
469 | case 2: | |
470 | /* Continue */ | |
471 | fill_get_buf("c"); | |
472 | break; | |
473 | case 3: | |
474 | /* Clear breakpoint */ | |
001fddf5 | 475 | break_helper("z0", NULL, sstep_addr); |
e8d31c20 JW |
476 | break; |
477 | default: | |
974460c5 | 478 | eprintk("kgdbts: ERROR failed sstep get emulation\n"); |
e8d31c20 JW |
479 | } |
480 | sstep_state++; | |
481 | } | |
482 | ||
483 | static int emul_sstep_put(char *put_str, char *arg) | |
484 | { | |
485 | if (!arch_needs_sstep_emulation) { | |
486c5987 JW |
486 | char *ptr = &put_str[11]; |
487 | if (put_str[1] != 'T' || put_str[2] != '0') | |
488 | return 1; | |
489 | kgdb_hex2long(&ptr, &sstep_thread_id); | |
490 | return 0; | |
e8d31c20 JW |
491 | } |
492 | switch (sstep_state) { | |
493 | case 1: | |
494 | /* validate the "g" packet to get the IP */ | |
495 | kgdb_hex2mem(&put_str[1], (char *)kgdbts_gdb_regs, | |
496 | NUMREGBYTES); | |
497 | gdb_regs_to_pt_regs(kgdbts_gdb_regs, &kgdbts_regs); | |
498 | v2printk("Stopped at IP: %lx\n", | |
499 | instruction_pointer(&kgdbts_regs)); | |
500 | /* Want to stop at IP + break instruction size by default */ | |
23bbd8e3 | 501 | sstep_addr = cont_addr + BREAK_INSTR_SIZE; |
e8d31c20 JW |
502 | break; |
503 | case 2: | |
504 | if (strncmp(put_str, "$OK", 3)) { | |
974460c5 | 505 | eprintk("kgdbts: failed sstep break set\n"); |
e8d31c20 JW |
506 | return 1; |
507 | } | |
508 | break; | |
509 | case 3: | |
510 | if (strncmp(put_str, "$T0", 3)) { | |
974460c5 | 511 | eprintk("kgdbts: failed continue sstep\n"); |
e8d31c20 | 512 | return 1; |
23bbd8e3 JW |
513 | } else { |
514 | char *ptr = &put_str[11]; | |
515 | kgdb_hex2long(&ptr, &sstep_thread_id); | |
e8d31c20 JW |
516 | } |
517 | break; | |
518 | case 4: | |
519 | if (strncmp(put_str, "$OK", 3)) { | |
974460c5 | 520 | eprintk("kgdbts: failed sstep break unset\n"); |
e8d31c20 JW |
521 | return 1; |
522 | } | |
523 | /* Single step is complete so continue on! */ | |
524 | sstep_state = 0; | |
525 | return 0; | |
526 | default: | |
974460c5 | 527 | eprintk("kgdbts: ERROR failed sstep put emulation\n"); |
e8d31c20 JW |
528 | } |
529 | ||
530 | /* Continue on the same test line until emulation is complete */ | |
531 | ts.idx--; | |
532 | return 0; | |
533 | } | |
534 | ||
535 | static int final_ack_set(char *put_str, char *arg) | |
536 | { | |
537 | if (strncmp(put_str+1, arg, 2)) | |
538 | return 1; | |
539 | final_ack = 1; | |
540 | return 0; | |
541 | } | |
542 | /* | |
543 | * Test to plant a breakpoint and detach, which should clear out the | |
544 | * breakpoint and restore the original instruction. | |
545 | */ | |
546 | static struct test_struct plant_and_detach_test[] = { | |
547 | { "?", "S0*" }, /* Clear break points */ | |
548 | { "kgdbts_break_test", "OK", sw_break, }, /* set sw breakpoint */ | |
549 | { "D", "OK" }, /* Detach */ | |
550 | { "", "" }, | |
551 | }; | |
552 | ||
553 | /* | |
554 | * Simple test to write in a software breakpoint, check for the | |
555 | * correct stop location and detach. | |
556 | */ | |
557 | static struct test_struct sw_breakpoint_test[] = { | |
558 | { "?", "S0*" }, /* Clear break points */ | |
559 | { "kgdbts_break_test", "OK", sw_break, }, /* set sw breakpoint */ | |
560 | { "c", "T0*", }, /* Continue */ | |
001fddf5 | 561 | { "g", "kgdbts_break_test", NULL, check_and_rewind_pc }, |
e8d31c20 JW |
562 | { "write", "OK", write_regs }, |
563 | { "kgdbts_break_test", "OK", sw_rem_break }, /*remove breakpoint */ | |
564 | { "D", "OK" }, /* Detach */ | |
001fddf5 | 565 | { "D", "OK", NULL, got_break }, /* On success we made it here */ |
e8d31c20 JW |
566 | { "", "" }, |
567 | }; | |
568 | ||
569 | /* | |
570 | * Test a known bad memory read location to test the fault handler and | |
571 | * read bytes 1-8 at the bad address | |
572 | */ | |
573 | static struct test_struct bad_read_test[] = { | |
574 | { "?", "S0*" }, /* Clear break points */ | |
575 | { "m0,1", "E*" }, /* read 1 byte at address 1 */ | |
576 | { "m0,2", "E*" }, /* read 1 byte at address 2 */ | |
577 | { "m0,3", "E*" }, /* read 1 byte at address 3 */ | |
578 | { "m0,4", "E*" }, /* read 1 byte at address 4 */ | |
579 | { "m0,5", "E*" }, /* read 1 byte at address 5 */ | |
580 | { "m0,6", "E*" }, /* read 1 byte at address 6 */ | |
581 | { "m0,7", "E*" }, /* read 1 byte at address 7 */ | |
582 | { "m0,8", "E*" }, /* read 1 byte at address 8 */ | |
583 | { "D", "OK" }, /* Detach which removes all breakpoints and continues */ | |
584 | { "", "" }, | |
585 | }; | |
586 | ||
587 | /* | |
588 | * Test for hitting a breakpoint, remove it, single step, plant it | |
589 | * again and detach. | |
590 | */ | |
591 | static struct test_struct singlestep_break_test[] = { | |
592 | { "?", "S0*" }, /* Clear break points */ | |
593 | { "kgdbts_break_test", "OK", sw_break, }, /* set sw breakpoint */ | |
486c5987 JW |
594 | { "c", "T0*", NULL, get_thread_id_continue }, /* Continue */ |
595 | { "kgdbts_break_test", "OK", sw_rem_break }, /*remove breakpoint */ | |
001fddf5 | 596 | { "g", "kgdbts_break_test", NULL, check_and_rewind_pc }, |
e8d31c20 | 597 | { "write", "OK", write_regs }, /* Write registers */ |
e8d31c20 | 598 | { "s", "T0*", emul_sstep_get, emul_sstep_put }, /* Single step */ |
001fddf5 | 599 | { "g", "kgdbts_break_test", NULL, check_single_step }, |
e8d31c20 JW |
600 | { "kgdbts_break_test", "OK", sw_break, }, /* set sw breakpoint */ |
601 | { "c", "T0*", }, /* Continue */ | |
001fddf5 | 602 | { "g", "kgdbts_break_test", NULL, check_and_rewind_pc }, |
e8d31c20 JW |
603 | { "write", "OK", write_regs }, /* Write registers */ |
604 | { "D", "OK" }, /* Remove all breakpoints and continues */ | |
605 | { "", "" }, | |
606 | }; | |
607 | ||
608 | /* | |
f30897c1 | 609 | * Test for hitting a breakpoint at kernel_clone for what ever the number |
e8d31c20 JW |
610 | * of iterations required by the variable repeat_test. |
611 | */ | |
f30897c1 | 612 | static struct test_struct do_kernel_clone_test[] = { |
e8d31c20 | 613 | { "?", "S0*" }, /* Clear break points */ |
f30897c1 | 614 | { "kernel_clone", "OK", sw_break, }, /* set sw breakpoint */ |
486c5987 | 615 | { "c", "T0*", NULL, get_thread_id_continue }, /* Continue */ |
f30897c1 CB |
616 | { "kernel_clone", "OK", sw_rem_break }, /*remove breakpoint */ |
617 | { "g", "kernel_clone", NULL, check_and_rewind_pc }, /* check location */ | |
23bbd8e3 | 618 | { "write", "OK", write_regs, emul_reset }, /* Write registers */ |
e8d31c20 | 619 | { "s", "T0*", emul_sstep_get, emul_sstep_put }, /* Single step */ |
f30897c1 CB |
620 | { "g", "kernel_clone", NULL, check_single_step }, |
621 | { "kernel_clone", "OK", sw_break, }, /* set sw breakpoint */ | |
e8d31c20 | 622 | { "7", "T0*", skip_back_repeat_test }, /* Loop based on repeat_test */ |
001fddf5 | 623 | { "D", "OK", NULL, final_ack_set }, /* detach and unregister I/O */ |
23bbd8e3 | 624 | { "", "", get_cont_catch, put_cont_catch }, |
e8d31c20 JW |
625 | }; |
626 | ||
627 | /* Test for hitting a breakpoint at sys_open for what ever the number | |
628 | * of iterations required by the variable repeat_test. | |
629 | */ | |
630 | static struct test_struct sys_open_test[] = { | |
631 | { "?", "S0*" }, /* Clear break points */ | |
1114ab22 | 632 | { "do_sys_openat2", "OK", sw_break, }, /* set sw breakpoint */ |
486c5987 | 633 | { "c", "T0*", NULL, get_thread_id_continue }, /* Continue */ |
1114ab22 DT |
634 | { "do_sys_openat2", "OK", sw_rem_break }, /*remove breakpoint */ |
635 | { "g", "do_sys_openat2", NULL, check_and_rewind_pc }, /* check location */ | |
23bbd8e3 | 636 | { "write", "OK", write_regs, emul_reset }, /* Write registers */ |
e8d31c20 | 637 | { "s", "T0*", emul_sstep_get, emul_sstep_put }, /* Single step */ |
1114ab22 DT |
638 | { "g", "do_sys_openat2", NULL, check_single_step }, |
639 | { "do_sys_openat2", "OK", sw_break, }, /* set sw breakpoint */ | |
e8d31c20 | 640 | { "7", "T0*", skip_back_repeat_test }, /* Loop based on repeat_test */ |
001fddf5 | 641 | { "D", "OK", NULL, final_ack_set }, /* detach and unregister I/O */ |
23bbd8e3 | 642 | { "", "", get_cont_catch, put_cont_catch }, |
e8d31c20 JW |
643 | }; |
644 | ||
645 | /* | |
646 | * Test for hitting a simple hw breakpoint | |
647 | */ | |
648 | static struct test_struct hw_breakpoint_test[] = { | |
649 | { "?", "S0*" }, /* Clear break points */ | |
650 | { "kgdbts_break_test", "OK", hw_break, }, /* set hw breakpoint */ | |
651 | { "c", "T0*", }, /* Continue */ | |
001fddf5 | 652 | { "g", "kgdbts_break_test", NULL, check_and_rewind_pc }, |
e8d31c20 JW |
653 | { "write", "OK", write_regs }, |
654 | { "kgdbts_break_test", "OK", hw_rem_break }, /*remove breakpoint */ | |
655 | { "D", "OK" }, /* Detach */ | |
001fddf5 | 656 | { "D", "OK", NULL, got_break }, /* On success we made it here */ |
e8d31c20 JW |
657 | { "", "" }, |
658 | }; | |
659 | ||
660 | /* | |
661 | * Test for hitting a hw write breakpoint | |
662 | */ | |
663 | static struct test_struct hw_write_break_test[] = { | |
664 | { "?", "S0*" }, /* Clear break points */ | |
665 | { "hw_break_val", "OK", hw_write_break, }, /* set hw breakpoint */ | |
001fddf5 HH |
666 | { "c", "T0*", NULL, got_break }, /* Continue */ |
667 | { "g", "silent", NULL, check_and_rewind_pc }, | |
e8d31c20 JW |
668 | { "write", "OK", write_regs }, |
669 | { "hw_break_val", "OK", hw_rem_write_break }, /*remove breakpoint */ | |
670 | { "D", "OK" }, /* Detach */ | |
001fddf5 | 671 | { "D", "OK", NULL, got_break }, /* On success we made it here */ |
e8d31c20 JW |
672 | { "", "" }, |
673 | }; | |
674 | ||
675 | /* | |
676 | * Test for hitting a hw access breakpoint | |
677 | */ | |
678 | static struct test_struct hw_access_break_test[] = { | |
679 | { "?", "S0*" }, /* Clear break points */ | |
680 | { "hw_break_val", "OK", hw_access_break, }, /* set hw breakpoint */ | |
001fddf5 HH |
681 | { "c", "T0*", NULL, got_break }, /* Continue */ |
682 | { "g", "silent", NULL, check_and_rewind_pc }, | |
e8d31c20 JW |
683 | { "write", "OK", write_regs }, |
684 | { "hw_break_val", "OK", hw_rem_access_break }, /*remove breakpoint */ | |
685 | { "D", "OK" }, /* Detach */ | |
001fddf5 | 686 | { "D", "OK", NULL, got_break }, /* On success we made it here */ |
e8d31c20 JW |
687 | { "", "" }, |
688 | }; | |
689 | ||
690 | /* | |
691 | * Test for hitting a hw access breakpoint | |
692 | */ | |
693 | static struct test_struct nmi_sleep_test[] = { | |
694 | { "?", "S0*" }, /* Clear break points */ | |
001fddf5 | 695 | { "c", "T0*", NULL, got_break }, /* Continue */ |
e8d31c20 | 696 | { "D", "OK" }, /* Detach */ |
001fddf5 | 697 | { "D", "OK", NULL, got_break }, /* On success we made it here */ |
e8d31c20 JW |
698 | { "", "" }, |
699 | }; | |
700 | ||
701 | static void fill_get_buf(char *buf) | |
702 | { | |
703 | unsigned char checksum = 0; | |
704 | int count = 0; | |
705 | char ch; | |
706 | ||
707 | strcpy(get_buf, "$"); | |
708 | strcat(get_buf, buf); | |
709 | while ((ch = buf[count])) { | |
710 | checksum += ch; | |
711 | count++; | |
712 | } | |
713 | strcat(get_buf, "#"); | |
827e609b HH |
714 | get_buf[count + 2] = hex_asc_hi(checksum); |
715 | get_buf[count + 3] = hex_asc_lo(checksum); | |
e8d31c20 JW |
716 | get_buf[count + 4] = '\0'; |
717 | v2printk("get%i: %s\n", ts.idx, get_buf); | |
718 | } | |
719 | ||
720 | static int validate_simple_test(char *put_str) | |
721 | { | |
722 | char *chk_str; | |
723 | ||
724 | if (ts.tst[ts.idx].put_handler) | |
725 | return ts.tst[ts.idx].put_handler(put_str, | |
726 | ts.tst[ts.idx].put); | |
727 | ||
728 | chk_str = ts.tst[ts.idx].put; | |
729 | if (*put_str == '$') | |
730 | put_str++; | |
731 | ||
732 | while (*chk_str != '\0' && *put_str != '\0') { | |
733 | /* If someone does a * to match the rest of the string, allow | |
25985edc | 734 | * it, or stop if the received string is complete. |
e8d31c20 JW |
735 | */ |
736 | if (*put_str == '#' || *chk_str == '*') | |
737 | return 0; | |
738 | if (*put_str != *chk_str) | |
739 | return 1; | |
740 | ||
741 | chk_str++; | |
742 | put_str++; | |
743 | } | |
744 | if (*chk_str == '\0' && (*put_str == '\0' || *put_str == '#')) | |
745 | return 0; | |
746 | ||
747 | return 1; | |
748 | } | |
749 | ||
750 | static int run_simple_test(int is_get_char, int chr) | |
751 | { | |
752 | int ret = 0; | |
753 | if (is_get_char) { | |
754 | /* Send an ACK on the get if a prior put completed and set the | |
755 | * send ack variable | |
756 | */ | |
757 | if (send_ack) { | |
758 | send_ack = 0; | |
759 | return '+'; | |
760 | } | |
761 | /* On the first get char, fill the transmit buffer and then | |
762 | * take from the get_string. | |
763 | */ | |
764 | if (get_buf_cnt == 0) { | |
765 | if (ts.tst[ts.idx].get_handler) | |
766 | ts.tst[ts.idx].get_handler(ts.tst[ts.idx].get); | |
767 | else | |
768 | fill_get_buf(ts.tst[ts.idx].get); | |
769 | } | |
770 | ||
771 | if (get_buf[get_buf_cnt] == '\0') { | |
974460c5 | 772 | eprintk("kgdbts: ERROR GET: EOB on '%s' at %i\n", |
e8d31c20 JW |
773 | ts.name, ts.idx); |
774 | get_buf_cnt = 0; | |
775 | fill_get_buf("D"); | |
776 | } | |
777 | ret = get_buf[get_buf_cnt]; | |
778 | get_buf_cnt++; | |
779 | return ret; | |
780 | } | |
781 | ||
782 | /* This callback is a put char which is when kgdb sends data to | |
783 | * this I/O module. | |
784 | */ | |
23bbd8e3 JW |
785 | if (ts.tst[ts.idx].get[0] == '\0' && ts.tst[ts.idx].put[0] == '\0' && |
786 | !ts.tst[ts.idx].get_handler) { | |
974460c5 | 787 | eprintk("kgdbts: ERROR: beyond end of test on" |
e8d31c20 JW |
788 | " '%s' line %i\n", ts.name, ts.idx); |
789 | return 0; | |
790 | } | |
791 | ||
792 | if (put_buf_cnt >= BUFMAX) { | |
974460c5 | 793 | eprintk("kgdbts: ERROR: put buffer overflow on" |
e8d31c20 JW |
794 | " '%s' line %i\n", ts.name, ts.idx); |
795 | put_buf_cnt = 0; | |
796 | return 0; | |
797 | } | |
798 | /* Ignore everything until the first valid packet start '$' */ | |
799 | if (put_buf_cnt == 0 && chr != '$') | |
800 | return 0; | |
801 | ||
802 | put_buf[put_buf_cnt] = chr; | |
803 | put_buf_cnt++; | |
804 | ||
805 | /* End of packet == #XX so look for the '#' */ | |
806 | if (put_buf_cnt > 3 && put_buf[put_buf_cnt - 3] == '#') { | |
b4f1b67b RK |
807 | if (put_buf_cnt >= BUFMAX) { |
808 | eprintk("kgdbts: ERROR: put buffer overflow on" | |
809 | " '%s' line %i\n", ts.name, ts.idx); | |
810 | put_buf_cnt = 0; | |
811 | return 0; | |
812 | } | |
e8d31c20 JW |
813 | put_buf[put_buf_cnt] = '\0'; |
814 | v2printk("put%i: %s\n", ts.idx, put_buf); | |
815 | /* Trigger check here */ | |
816 | if (ts.validate_put && ts.validate_put(put_buf)) { | |
974460c5 | 817 | eprintk("kgdbts: ERROR PUT: end of test " |
e8d31c20 JW |
818 | "buffer on '%s' line %i expected %s got %s\n", |
819 | ts.name, ts.idx, ts.tst[ts.idx].put, put_buf); | |
820 | } | |
821 | ts.idx++; | |
822 | put_buf_cnt = 0; | |
823 | get_buf_cnt = 0; | |
824 | send_ack = 1; | |
825 | } | |
826 | return 0; | |
827 | } | |
828 | ||
829 | static void init_simple_test(void) | |
830 | { | |
831 | memset(&ts, 0, sizeof(ts)); | |
832 | ts.run_test = run_simple_test; | |
833 | ts.validate_put = validate_simple_test; | |
834 | } | |
835 | ||
836 | static void run_plant_and_detach_test(int is_early) | |
837 | { | |
838 | char before[BREAK_INSTR_SIZE]; | |
839 | char after[BREAK_INSTR_SIZE]; | |
840 | ||
fe557319 | 841 | copy_from_kernel_nofault(before, (char *)kgdbts_break_test, |
e8d31c20 JW |
842 | BREAK_INSTR_SIZE); |
843 | init_simple_test(); | |
844 | ts.tst = plant_and_detach_test; | |
845 | ts.name = "plant_and_detach_test"; | |
846 | /* Activate test with initial breakpoint */ | |
847 | if (!is_early) | |
848 | kgdb_breakpoint(); | |
fe557319 CH |
849 | copy_from_kernel_nofault(after, (char *)kgdbts_break_test, |
850 | BREAK_INSTR_SIZE); | |
e8d31c20 JW |
851 | if (memcmp(before, after, BREAK_INSTR_SIZE)) { |
852 | printk(KERN_CRIT "kgdbts: ERROR kgdb corrupted memory\n"); | |
853 | panic("kgdb memory corruption"); | |
854 | } | |
855 | ||
856 | /* complete the detach test */ | |
857 | if (!is_early) | |
858 | kgdbts_break_test(); | |
859 | } | |
860 | ||
861 | static void run_breakpoint_test(int is_hw_breakpoint) | |
862 | { | |
863 | test_complete = 0; | |
864 | init_simple_test(); | |
865 | if (is_hw_breakpoint) { | |
866 | ts.tst = hw_breakpoint_test; | |
867 | ts.name = "hw_breakpoint_test"; | |
868 | } else { | |
869 | ts.tst = sw_breakpoint_test; | |
870 | ts.name = "sw_breakpoint_test"; | |
871 | } | |
872 | /* Activate test with initial breakpoint */ | |
873 | kgdb_breakpoint(); | |
874 | /* run code with the break point in it */ | |
875 | kgdbts_break_test(); | |
876 | kgdb_breakpoint(); | |
877 | ||
878 | if (test_complete) | |
879 | return; | |
880 | ||
974460c5 | 881 | eprintk("kgdbts: ERROR %s test failed\n", ts.name); |
b33cb815 JW |
882 | if (is_hw_breakpoint) |
883 | hwbreaks_ok = 0; | |
e8d31c20 JW |
884 | } |
885 | ||
886 | static void run_hw_break_test(int is_write_test) | |
887 | { | |
888 | test_complete = 0; | |
889 | init_simple_test(); | |
890 | if (is_write_test) { | |
891 | ts.tst = hw_write_break_test; | |
892 | ts.name = "hw_write_break_test"; | |
893 | } else { | |
894 | ts.tst = hw_access_break_test; | |
895 | ts.name = "hw_access_break_test"; | |
896 | } | |
897 | /* Activate test with initial breakpoint */ | |
898 | kgdb_breakpoint(); | |
899 | hw_break_val_access(); | |
900 | if (is_write_test) { | |
b33cb815 | 901 | if (test_complete == 2) { |
974460c5 | 902 | eprintk("kgdbts: ERROR %s broke on access\n", |
e8d31c20 | 903 | ts.name); |
b33cb815 JW |
904 | hwbreaks_ok = 0; |
905 | } | |
e8d31c20 JW |
906 | hw_break_val_write(); |
907 | } | |
908 | kgdb_breakpoint(); | |
909 | ||
910 | if (test_complete == 1) | |
911 | return; | |
912 | ||
974460c5 | 913 | eprintk("kgdbts: ERROR %s test failed\n", ts.name); |
b33cb815 | 914 | hwbreaks_ok = 0; |
e8d31c20 JW |
915 | } |
916 | ||
917 | static void run_nmi_sleep_test(int nmi_sleep) | |
918 | { | |
919 | unsigned long flags; | |
920 | ||
921 | init_simple_test(); | |
922 | ts.tst = nmi_sleep_test; | |
923 | ts.name = "nmi_sleep_test"; | |
924 | /* Activate test with initial breakpoint */ | |
925 | kgdb_breakpoint(); | |
926 | local_irq_save(flags); | |
927 | mdelay(nmi_sleep*1000); | |
928 | touch_nmi_watchdog(); | |
929 | local_irq_restore(flags); | |
930 | if (test_complete != 2) | |
974460c5 | 931 | eprintk("kgdbts: ERROR nmi_test did not hit nmi\n"); |
e8d31c20 JW |
932 | kgdb_breakpoint(); |
933 | if (test_complete == 1) | |
934 | return; | |
935 | ||
974460c5 | 936 | eprintk("kgdbts: ERROR %s test failed\n", ts.name); |
e8d31c20 JW |
937 | } |
938 | ||
939 | static void run_bad_read_test(void) | |
940 | { | |
941 | init_simple_test(); | |
942 | ts.tst = bad_read_test; | |
943 | ts.name = "bad_read_test"; | |
944 | /* Activate test with initial breakpoint */ | |
945 | kgdb_breakpoint(); | |
946 | } | |
947 | ||
f30897c1 | 948 | static void run_kernel_clone_test(void) |
e8d31c20 JW |
949 | { |
950 | init_simple_test(); | |
f30897c1 CB |
951 | ts.tst = do_kernel_clone_test; |
952 | ts.name = "do_kernel_clone_test"; | |
e8d31c20 JW |
953 | /* Activate test with initial breakpoint */ |
954 | kgdb_breakpoint(); | |
955 | } | |
956 | ||
957 | static void run_sys_open_test(void) | |
958 | { | |
959 | init_simple_test(); | |
960 | ts.tst = sys_open_test; | |
961 | ts.name = "sys_open_test"; | |
962 | /* Activate test with initial breakpoint */ | |
963 | kgdb_breakpoint(); | |
964 | } | |
965 | ||
966 | static void run_singlestep_break_test(void) | |
967 | { | |
968 | init_simple_test(); | |
969 | ts.tst = singlestep_break_test; | |
970 | ts.name = "singlestep_breakpoint_test"; | |
971 | /* Activate test with initial breakpoint */ | |
972 | kgdb_breakpoint(); | |
973 | kgdbts_break_test(); | |
974 | kgdbts_break_test(); | |
975 | } | |
976 | ||
977 | static void kgdbts_run_tests(void) | |
978 | { | |
979 | char *ptr; | |
f30897c1 | 980 | int clone_test = 0; |
001fddf5 | 981 | int do_sys_open_test = 0; |
7cfcd985 | 982 | int sstep_test = 1000; |
e8d31c20 | 983 | int nmi_sleep = 0; |
7cfcd985 | 984 | int i; |
e8d31c20 | 985 | |
fa0218ef LA |
986 | verbose = 0; |
987 | if (strstr(config, "V1")) | |
988 | verbose = 1; | |
989 | if (strstr(config, "V2")) | |
990 | verbose = 2; | |
991 | ||
59d309f9 | 992 | ptr = strchr(config, 'F'); |
e8d31c20 | 993 | if (ptr) |
f30897c1 | 994 | clone_test = simple_strtol(ptr + 1, NULL, 10); |
59d309f9 | 995 | ptr = strchr(config, 'S'); |
e8d31c20 | 996 | if (ptr) |
001fddf5 | 997 | do_sys_open_test = simple_strtol(ptr + 1, NULL, 10); |
59d309f9 | 998 | ptr = strchr(config, 'N'); |
e8d31c20 JW |
999 | if (ptr) |
1000 | nmi_sleep = simple_strtol(ptr+1, NULL, 10); | |
59d309f9 | 1001 | ptr = strchr(config, 'I'); |
7cfcd985 JW |
1002 | if (ptr) |
1003 | sstep_test = simple_strtol(ptr+1, NULL, 10); | |
e8d31c20 | 1004 | |
456ca7ff JW |
1005 | /* All HW break point tests */ |
1006 | if (arch_kgdb_ops.flags & KGDB_HW_BREAKPOINT) { | |
1007 | hwbreaks_ok = 1; | |
1008 | v1printk("kgdbts:RUN hw breakpoint test\n"); | |
1009 | run_breakpoint_test(1); | |
1010 | v1printk("kgdbts:RUN hw write breakpoint test\n"); | |
1011 | run_hw_break_test(1); | |
1012 | v1printk("kgdbts:RUN access write breakpoint test\n"); | |
1013 | run_hw_break_test(0); | |
1014 | } | |
456ca7ff | 1015 | |
e8d31c20 JW |
1016 | /* required internal KGDB tests */ |
1017 | v1printk("kgdbts:RUN plant and detach test\n"); | |
1018 | run_plant_and_detach_test(0); | |
1019 | v1printk("kgdbts:RUN sw breakpoint test\n"); | |
1020 | run_breakpoint_test(0); | |
1021 | v1printk("kgdbts:RUN bad memory access test\n"); | |
1022 | run_bad_read_test(); | |
7cfcd985 JW |
1023 | v1printk("kgdbts:RUN singlestep test %i iterations\n", sstep_test); |
1024 | for (i = 0; i < sstep_test; i++) { | |
1025 | run_singlestep_break_test(); | |
1026 | if (i % 100 == 0) | |
1027 | v1printk("kgdbts:RUN singlestep [%i/%i]\n", | |
1028 | i, sstep_test); | |
1029 | } | |
e8d31c20 JW |
1030 | |
1031 | /* ===Optional tests=== */ | |
1032 | ||
e8d31c20 JW |
1033 | if (nmi_sleep) { |
1034 | v1printk("kgdbts:RUN NMI sleep %i seconds test\n", nmi_sleep); | |
1035 | run_nmi_sleep_test(nmi_sleep); | |
1036 | } | |
1037 | ||
f30897c1 | 1038 | /* If the kernel_clone test is run it will be the last test that is |
e8d31c20 JW |
1039 | * executed because a kernel thread will be spawned at the very |
1040 | * end to unregister the debug hooks. | |
1041 | */ | |
f30897c1 CB |
1042 | if (clone_test) { |
1043 | repeat_test = clone_test; | |
1044 | printk(KERN_INFO "kgdbts:RUN kernel_clone for %i breakpoints\n", | |
e8d31c20 | 1045 | repeat_test); |
001fddf5 | 1046 | kthread_run(kgdbts_unreg_thread, NULL, "kgdbts_unreg"); |
f30897c1 | 1047 | run_kernel_clone_test(); |
e8d31c20 JW |
1048 | return; |
1049 | } | |
1050 | ||
1051 | /* If the sys_open test is run it will be the last test that is | |
1052 | * executed because a kernel thread will be spawned at the very | |
1053 | * end to unregister the debug hooks. | |
1054 | */ | |
001fddf5 HH |
1055 | if (do_sys_open_test) { |
1056 | repeat_test = do_sys_open_test; | |
e8d31c20 JW |
1057 | printk(KERN_INFO "kgdbts:RUN sys_open for %i breakpoints\n", |
1058 | repeat_test); | |
001fddf5 | 1059 | kthread_run(kgdbts_unreg_thread, NULL, "kgdbts_unreg"); |
e8d31c20 JW |
1060 | run_sys_open_test(); |
1061 | return; | |
1062 | } | |
1063 | /* Shutdown and unregister */ | |
1064 | kgdb_unregister_io_module(&kgdbts_io_ops); | |
1065 | configured = 0; | |
1066 | } | |
1067 | ||
1068 | static int kgdbts_option_setup(char *opt) | |
1069 | { | |
adb4b83c | 1070 | if (strlen(opt) >= MAX_CONFIG_LEN) { |
e8d31c20 JW |
1071 | printk(KERN_ERR "kgdbts: config string too long\n"); |
1072 | return -ENOSPC; | |
1073 | } | |
1074 | strcpy(config, opt); | |
e8d31c20 JW |
1075 | return 0; |
1076 | } | |
1077 | ||
1078 | __setup("kgdbts=", kgdbts_option_setup); | |
1079 | ||
1080 | static int configure_kgdbts(void) | |
1081 | { | |
1082 | int err = 0; | |
1083 | ||
1084 | if (!strlen(config) || isspace(config[0])) | |
1085 | goto noconfig; | |
e8d31c20 JW |
1086 | |
1087 | final_ack = 0; | |
1088 | run_plant_and_detach_test(1); | |
1089 | ||
1090 | err = kgdb_register_io_module(&kgdbts_io_ops); | |
1091 | if (err) { | |
1092 | configured = 0; | |
1093 | return err; | |
1094 | } | |
1095 | configured = 1; | |
1096 | kgdbts_run_tests(); | |
1097 | ||
1098 | return err; | |
1099 | ||
1100 | noconfig: | |
1101 | config[0] = 0; | |
1102 | configured = 0; | |
1103 | ||
1104 | return err; | |
1105 | } | |
1106 | ||
1107 | static int __init init_kgdbts(void) | |
1108 | { | |
1109 | /* Already configured? */ | |
1110 | if (configured == 1) | |
1111 | return 0; | |
1112 | ||
1113 | return configure_kgdbts(); | |
1114 | } | |
67dd339c | 1115 | device_initcall(init_kgdbts); |
e8d31c20 | 1116 | |
e8d31c20 JW |
1117 | static int kgdbts_get_char(void) |
1118 | { | |
1119 | int val = 0; | |
1120 | ||
1121 | if (ts.run_test) | |
1122 | val = ts.run_test(1, 0); | |
1123 | ||
1124 | return val; | |
1125 | } | |
1126 | ||
1127 | static void kgdbts_put_char(u8 chr) | |
1128 | { | |
1129 | if (ts.run_test) | |
1130 | ts.run_test(0, chr); | |
1131 | } | |
1132 | ||
e4dca7b7 KC |
1133 | static int param_set_kgdbts_var(const char *kmessage, |
1134 | const struct kernel_param *kp) | |
e8d31c20 | 1135 | { |
b281218a | 1136 | size_t len = strlen(kmessage); |
e8d31c20 JW |
1137 | |
1138 | if (len >= MAX_CONFIG_LEN) { | |
1139 | printk(KERN_ERR "kgdbts: config string too long\n"); | |
1140 | return -ENOSPC; | |
1141 | } | |
1142 | ||
1143 | /* Only copy in the string if the init function has not run yet */ | |
1144 | if (configured < 0) { | |
1145 | strcpy(config, kmessage); | |
1146 | return 0; | |
1147 | } | |
1148 | ||
4dacd5c0 DD |
1149 | if (configured == 1) { |
1150 | printk(KERN_ERR "kgdbts: ERROR: Already configured and running.\n"); | |
e8d31c20 JW |
1151 | return -EBUSY; |
1152 | } | |
1153 | ||
1154 | strcpy(config, kmessage); | |
1155 | /* Chop out \n char as a result of echo */ | |
b281218a | 1156 | if (len && config[len - 1] == '\n') |
e8d31c20 JW |
1157 | config[len - 1] = '\0'; |
1158 | ||
e8d31c20 JW |
1159 | /* Go and configure with the new params. */ |
1160 | return configure_kgdbts(); | |
1161 | } | |
1162 | ||
1163 | static void kgdbts_pre_exp_handler(void) | |
1164 | { | |
1165 | /* Increment the module count when the debugger is active */ | |
1166 | if (!kgdb_connected) | |
1167 | try_module_get(THIS_MODULE); | |
1168 | } | |
1169 | ||
1170 | static void kgdbts_post_exp_handler(void) | |
1171 | { | |
1172 | /* decrement the module count when the debugger detaches */ | |
1173 | if (!kgdb_connected) | |
1174 | module_put(THIS_MODULE); | |
1175 | } | |
1176 | ||
1177 | static struct kgdb_io kgdbts_io_ops = { | |
1178 | .name = "kgdbts", | |
1179 | .read_char = kgdbts_get_char, | |
1180 | .write_char = kgdbts_put_char, | |
1181 | .pre_exception = kgdbts_pre_exp_handler, | |
1182 | .post_exception = kgdbts_post_exp_handler, | |
1183 | }; | |
1184 | ||
67dd339c PG |
1185 | /* |
1186 | * not really modular, but the easiest way to keep compat with existing | |
1187 | * bootargs behaviour is to continue using module_param here. | |
1188 | */ | |
e8d31c20 JW |
1189 | module_param_call(kgdbts, param_set_kgdbts_var, param_get_string, &kps, 0644); |
1190 | MODULE_PARM_DESC(kgdbts, "<A|V1|V2>[F#|S#][N#]"); |