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.
6 * Created by: Jason Wessel <jason.wessel@windriver.com>
8 * Copyright (c) 2008 Wind River Systems, Inc.
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.
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.
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
23 /* Information about the kgdb test suite.
24 * -------------------------------------
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
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=
39 * When using the "kgdbts=" you only choose one of the following core
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
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
51 * NOTE: that the do_fork and sys_open tests are mutually exclusive.
53 * To invoke the kgdb test suite from boot you use a kernel start
54 * argument as follows:
56 * Or if you wanted to perform the NMI test for 6 seconds and do_fork
57 * test for 100 forks, you could use:
58 * kgdbts=V1N6F100 kgdbwait
60 * The test suite can also be invoked at run time with:
61 * echo kgdbts=V1N6F100 > /sys/module/kgdbts/parameters/kgdbts
62 * Or as another example:
63 * echo kgdbts=V2 > /sys/module/kgdbts/parameters/kgdbts
65 * When developing a new kgdb arch specific implementation or
66 * using these tests for the purpose of regression testing,
67 * several invocations are required.
69 * 1) Boot with the test suite enabled by using the kernel arguments
70 * "kgdbts=V1F100 kgdbwait"
71 * ## If kgdb arch specific implementation has NMI use
74 * 2) After the system boot run the basic test.
75 * echo kgdbts=V1 > /sys/module/kgdbts/parameters/kgdbts
77 * 3) Run the concurrency tests. It is best to use n+1
78 * while loops where n is the number of cpus you have
79 * in your system. The example below uses only two
82 * ## This tests break points on sys_open
83 * while [ 1 ] ; do find / > /dev/null 2>&1 ; done &
84 * while [ 1 ] ; do find / > /dev/null 2>&1 ; done &
85 * echo kgdbts=V1S10000 > /sys/module/kgdbts/parameters/kgdbts
86 * fg # and hit control-c
87 * fg # and hit control-c
88 * ## This tests break points on do_fork
89 * while [ 1 ] ; do date > /dev/null ; done &
90 * while [ 1 ] ; do date > /dev/null ; done &
91 * echo kgdbts=V1F1000 > /sys/module/kgdbts/parameters/kgdbts
92 * fg # and hit control-c
96 #include <linux/kernel.h>
97 #include <linux/kgdb.h>
98 #include <linux/ctype.h>
99 #include <linux/uaccess.h>
100 #include <linux/syscalls.h>
101 #include <linux/nmi.h>
102 #include <linux/delay.h>
103 #include <linux/kthread.h>
104 #include <linux/delay.h>
106 #define v1printk(a...) do { \
108 printk(KERN_INFO a); \
110 #define v2printk(a...) do { \
112 printk(KERN_INFO a); \
113 touch_nmi_watchdog(); \
115 #define eprintk(a...) do { \
116 printk(KERN_ERR a); \
119 #define MAX_CONFIG_LEN 40
121 static const char hexchars[] = "0123456789abcdef";
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];
129 static int repeat_test;
130 static int test_complete;
132 static int final_ack;
133 static int hw_break_val;
134 static int hw_break_val2;
135 #if defined(CONFIG_ARM) || defined(CONFIG_MIPS)
136 static int arch_needs_sstep_emulation = 1;
138 static int arch_needs_sstep_emulation;
140 static unsigned long sstep_addr;
141 static int sstep_state;
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;
149 /* -1 = init not run yet, 0 = unconfigured, 1 = configured. */
150 static int configured = -1;
152 #ifdef CONFIG_KGDB_TESTS_BOOT_STRING
153 static char config[MAX_CONFIG_LEN] = CONFIG_KGDB_TESTS_BOOT_STRING;
155 static char config[MAX_CONFIG_LEN];
157 static struct kparam_string kps = {
159 .maxlen = MAX_CONFIG_LEN,
162 static void fill_get_buf(char *buf);
167 void (*get_handler)(char *);
168 int (*put_handler)(char *, char *);
173 struct test_struct *tst;
175 int (*run_test) (int, int);
176 int (*validate_put) (char *);
179 static struct test_state ts;
181 static int kgdbts_unreg_thread(void *ptr)
183 /* Wait until the tests are complete and then ungresiter the I/O
187 msleep_interruptible(1500);
190 kgdb_unregister_io_module(&kgdbts_io_ops);
196 /* This is noinline such that it can be used for a single location to
199 static noinline void kgdbts_break_test(void)
201 v2printk("kgdbts: breakpoint complete\n");
204 /* Lookup symbol info in the kernel */
205 static unsigned long lookup_addr(char *arg)
207 unsigned long addr = 0;
209 if (!strcmp(arg, "kgdbts_break_test"))
210 addr = (unsigned long)kgdbts_break_test;
211 else if (!strcmp(arg, "sys_open"))
212 addr = (unsigned long)sys_open;
213 else if (!strcmp(arg, "do_fork"))
214 addr = (unsigned long)do_fork;
215 else if (!strcmp(arg, "hw_break_val"))
216 addr = (unsigned long)&hw_break_val;
220 static void break_helper(char *bp_type, char *arg, unsigned long vaddr)
225 addr = lookup_addr(arg);
229 sprintf(scratch_buf, "%s,%lx,%i", bp_type, addr,
231 fill_get_buf(scratch_buf);
234 static void sw_break(char *arg)
236 break_helper("Z0", arg, 0);
239 static void sw_rem_break(char *arg)
241 break_helper("z0", arg, 0);
244 static void hw_break(char *arg)
246 break_helper("Z1", arg, 0);
249 static void hw_rem_break(char *arg)
251 break_helper("z1", arg, 0);
254 static void hw_write_break(char *arg)
256 break_helper("Z2", arg, 0);
259 static void hw_rem_write_break(char *arg)
261 break_helper("z2", arg, 0);
264 static void hw_access_break(char *arg)
266 break_helper("Z4", arg, 0);
269 static void hw_rem_access_break(char *arg)
271 break_helper("z4", arg, 0);
274 static void hw_break_val_access(void)
276 hw_break_val2 = hw_break_val;
279 static void hw_break_val_write(void)
284 static int check_and_rewind_pc(char *put_str, char *arg)
286 unsigned long addr = lookup_addr(arg);
289 kgdb_hex2mem(&put_str[1], (char *)kgdbts_gdb_regs,
291 gdb_regs_to_pt_regs(kgdbts_gdb_regs, &kgdbts_regs);
292 v2printk("Stopped at IP: %lx\n", instruction_pointer(&kgdbts_regs));
294 /* On x86 a breakpoint stop requires it to be decremented */
295 if (addr + 1 == kgdbts_regs.ip)
298 if (strcmp(arg, "silent") &&
299 instruction_pointer(&kgdbts_regs) + offset != addr) {
300 eprintk("kgdbts: BP mismatch %lx expected %lx\n",
301 instruction_pointer(&kgdbts_regs) + offset, addr);
305 /* On x86 adjust the instruction pointer if needed */
306 kgdbts_regs.ip += offset;
311 static int check_single_step(char *put_str, char *arg)
313 unsigned long addr = lookup_addr(arg);
315 * From an arch indepent point of view the instruction pointer
316 * should be on a different instruction
318 kgdb_hex2mem(&put_str[1], (char *)kgdbts_gdb_regs,
320 gdb_regs_to_pt_regs(kgdbts_gdb_regs, &kgdbts_regs);
321 v2printk("Singlestep stopped at IP: %lx\n",
322 instruction_pointer(&kgdbts_regs));
323 if (instruction_pointer(&kgdbts_regs) == addr) {
324 eprintk("kgdbts: SingleStep failed at %lx\n",
325 instruction_pointer(&kgdbts_regs));
332 static void write_regs(char *arg)
334 memset(scratch_buf, 0, sizeof(scratch_buf));
335 scratch_buf[0] = 'G';
336 pt_regs_to_gdb_regs(kgdbts_gdb_regs, &kgdbts_regs);
337 kgdb_mem2hex((char *)kgdbts_gdb_regs, &scratch_buf[1], NUMREGBYTES);
338 fill_get_buf(scratch_buf);
341 static void skip_back_repeat_test(char *arg)
343 int go_back = simple_strtol(arg, NULL, 10);
346 if (repeat_test <= 0)
350 fill_get_buf(ts.tst[ts.idx].get);
353 static int got_break(char *put_str, char *arg)
356 if (!strncmp(put_str+1, arg, 2)) {
357 if (!strncmp(arg, "T0", 2))
364 static void emul_sstep_get(char *arg)
366 if (!arch_needs_sstep_emulation) {
370 switch (sstep_state) {
372 v2printk("Emulate single step\n");
373 /* Start by looking at the current PC */
378 break_helper("Z0", 0, sstep_addr);
385 /* Clear breakpoint */
386 break_helper("z0", 0, sstep_addr);
389 eprintk("kgdbts: ERROR failed sstep get emulation\n");
394 static int emul_sstep_put(char *put_str, char *arg)
396 if (!arch_needs_sstep_emulation) {
397 if (!strncmp(put_str+1, arg, 2))
401 switch (sstep_state) {
403 /* validate the "g" packet to get the IP */
404 kgdb_hex2mem(&put_str[1], (char *)kgdbts_gdb_regs,
406 gdb_regs_to_pt_regs(kgdbts_gdb_regs, &kgdbts_regs);
407 v2printk("Stopped at IP: %lx\n",
408 instruction_pointer(&kgdbts_regs));
409 /* Want to stop at IP + break instruction size by default */
410 sstep_addr = instruction_pointer(&kgdbts_regs) +
414 if (strncmp(put_str, "$OK", 3)) {
415 eprintk("kgdbts: failed sstep break set\n");
420 if (strncmp(put_str, "$T0", 3)) {
421 eprintk("kgdbts: failed continue sstep\n");
426 if (strncmp(put_str, "$OK", 3)) {
427 eprintk("kgdbts: failed sstep break unset\n");
430 /* Single step is complete so continue on! */
434 eprintk("kgdbts: ERROR failed sstep put emulation\n");
437 /* Continue on the same test line until emulation is complete */
442 static int final_ack_set(char *put_str, char *arg)
444 if (strncmp(put_str+1, arg, 2))
450 * Test to plant a breakpoint and detach, which should clear out the
451 * breakpoint and restore the original instruction.
453 static struct test_struct plant_and_detach_test[] = {
454 { "?", "S0*" }, /* Clear break points */
455 { "kgdbts_break_test", "OK", sw_break, }, /* set sw breakpoint */
456 { "D", "OK" }, /* Detach */
461 * Simple test to write in a software breakpoint, check for the
462 * correct stop location and detach.
464 static struct test_struct sw_breakpoint_test[] = {
465 { "?", "S0*" }, /* Clear break points */
466 { "kgdbts_break_test", "OK", sw_break, }, /* set sw breakpoint */
467 { "c", "T0*", }, /* Continue */
468 { "g", "kgdbts_break_test", 0, check_and_rewind_pc },
469 { "write", "OK", write_regs },
470 { "kgdbts_break_test", "OK", sw_rem_break }, /*remove breakpoint */
471 { "D", "OK" }, /* Detach */
472 { "D", "OK", 0, got_break }, /* If the test worked we made it here */
477 * Test a known bad memory read location to test the fault handler and
478 * read bytes 1-8 at the bad address
480 static struct test_struct bad_read_test[] = {
481 { "?", "S0*" }, /* Clear break points */
482 { "m0,1", "E*" }, /* read 1 byte at address 1 */
483 { "m0,2", "E*" }, /* read 1 byte at address 2 */
484 { "m0,3", "E*" }, /* read 1 byte at address 3 */
485 { "m0,4", "E*" }, /* read 1 byte at address 4 */
486 { "m0,5", "E*" }, /* read 1 byte at address 5 */
487 { "m0,6", "E*" }, /* read 1 byte at address 6 */
488 { "m0,7", "E*" }, /* read 1 byte at address 7 */
489 { "m0,8", "E*" }, /* read 1 byte at address 8 */
490 { "D", "OK" }, /* Detach which removes all breakpoints and continues */
495 * Test for hitting a breakpoint, remove it, single step, plant it
498 static struct test_struct singlestep_break_test[] = {
499 { "?", "S0*" }, /* Clear break points */
500 { "kgdbts_break_test", "OK", sw_break, }, /* set sw breakpoint */
501 { "c", "T0*", }, /* Continue */
502 { "g", "kgdbts_break_test", 0, check_and_rewind_pc },
503 { "write", "OK", write_regs }, /* Write registers */
504 { "kgdbts_break_test", "OK", sw_rem_break }, /*remove breakpoint */
505 { "s", "T0*", emul_sstep_get, emul_sstep_put }, /* Single step */
506 { "g", "kgdbts_break_test", 0, check_single_step },
507 { "kgdbts_break_test", "OK", sw_break, }, /* set sw breakpoint */
508 { "c", "T0*", }, /* Continue */
509 { "g", "kgdbts_break_test", 0, check_and_rewind_pc },
510 { "write", "OK", write_regs }, /* Write registers */
511 { "D", "OK" }, /* Remove all breakpoints and continues */
516 * Test for hitting a breakpoint at do_fork for what ever the number
517 * of iterations required by the variable repeat_test.
519 static struct test_struct do_fork_test[] = {
520 { "?", "S0*" }, /* Clear break points */
521 { "do_fork", "OK", sw_break, }, /* set sw breakpoint */
522 { "c", "T0*", }, /* Continue */
523 { "g", "do_fork", 0, check_and_rewind_pc }, /* check location */
524 { "write", "OK", write_regs }, /* Write registers */
525 { "do_fork", "OK", sw_rem_break }, /*remove breakpoint */
526 { "s", "T0*", emul_sstep_get, emul_sstep_put }, /* Single step */
527 { "g", "do_fork", 0, check_single_step },
528 { "do_fork", "OK", sw_break, }, /* set sw breakpoint */
529 { "7", "T0*", skip_back_repeat_test }, /* Loop based on repeat_test */
530 { "D", "OK", 0, final_ack_set }, /* detach and unregister I/O */
534 /* Test for hitting a breakpoint at sys_open for what ever the number
535 * of iterations required by the variable repeat_test.
537 static struct test_struct sys_open_test[] = {
538 { "?", "S0*" }, /* Clear break points */
539 { "sys_open", "OK", sw_break, }, /* set sw breakpoint */
540 { "c", "T0*", }, /* Continue */
541 { "g", "sys_open", 0, check_and_rewind_pc }, /* check location */
542 { "write", "OK", write_regs }, /* Write registers */
543 { "sys_open", "OK", sw_rem_break }, /*remove breakpoint */
544 { "s", "T0*", emul_sstep_get, emul_sstep_put }, /* Single step */
545 { "g", "sys_open", 0, check_single_step },
546 { "sys_open", "OK", sw_break, }, /* set sw breakpoint */
547 { "7", "T0*", skip_back_repeat_test }, /* Loop based on repeat_test */
548 { "D", "OK", 0, final_ack_set }, /* detach and unregister I/O */
553 * Test for hitting a simple hw breakpoint
555 static struct test_struct hw_breakpoint_test[] = {
556 { "?", "S0*" }, /* Clear break points */
557 { "kgdbts_break_test", "OK", hw_break, }, /* set hw breakpoint */
558 { "c", "T0*", }, /* Continue */
559 { "g", "kgdbts_break_test", 0, check_and_rewind_pc },
560 { "write", "OK", write_regs },
561 { "kgdbts_break_test", "OK", hw_rem_break }, /*remove breakpoint */
562 { "D", "OK" }, /* Detach */
563 { "D", "OK", 0, got_break }, /* If the test worked we made it here */
568 * Test for hitting a hw write breakpoint
570 static struct test_struct hw_write_break_test[] = {
571 { "?", "S0*" }, /* Clear break points */
572 { "hw_break_val", "OK", hw_write_break, }, /* set hw breakpoint */
573 { "c", "T0*", 0, got_break }, /* Continue */
574 { "g", "silent", 0, check_and_rewind_pc },
575 { "write", "OK", write_regs },
576 { "hw_break_val", "OK", hw_rem_write_break }, /*remove breakpoint */
577 { "D", "OK" }, /* Detach */
578 { "D", "OK", 0, got_break }, /* If the test worked we made it here */
583 * Test for hitting a hw access breakpoint
585 static struct test_struct hw_access_break_test[] = {
586 { "?", "S0*" }, /* Clear break points */
587 { "hw_break_val", "OK", hw_access_break, }, /* set hw breakpoint */
588 { "c", "T0*", 0, got_break }, /* Continue */
589 { "g", "silent", 0, check_and_rewind_pc },
590 { "write", "OK", write_regs },
591 { "hw_break_val", "OK", hw_rem_access_break }, /*remove breakpoint */
592 { "D", "OK" }, /* Detach */
593 { "D", "OK", 0, got_break }, /* If the test worked we made it here */
598 * Test for hitting a hw access breakpoint
600 static struct test_struct nmi_sleep_test[] = {
601 { "?", "S0*" }, /* Clear break points */
602 { "c", "T0*", 0, got_break }, /* Continue */
603 { "D", "OK" }, /* Detach */
604 { "D", "OK", 0, got_break }, /* If the test worked we made it here */
608 static void fill_get_buf(char *buf)
610 unsigned char checksum = 0;
614 strcpy(get_buf, "$");
615 strcat(get_buf, buf);
616 while ((ch = buf[count])) {
620 strcat(get_buf, "#");
621 get_buf[count + 2] = hexchars[checksum >> 4];
622 get_buf[count + 3] = hexchars[checksum & 0xf];
623 get_buf[count + 4] = '\0';
624 v2printk("get%i: %s\n", ts.idx, get_buf);
627 static int validate_simple_test(char *put_str)
631 if (ts.tst[ts.idx].put_handler)
632 return ts.tst[ts.idx].put_handler(put_str,
635 chk_str = ts.tst[ts.idx].put;
639 while (*chk_str != '\0' && *put_str != '\0') {
640 /* If someone does a * to match the rest of the string, allow
641 * it, or stop if the recieved string is complete.
643 if (*put_str == '#' || *chk_str == '*')
645 if (*put_str != *chk_str)
651 if (*chk_str == '\0' && (*put_str == '\0' || *put_str == '#'))
657 static int run_simple_test(int is_get_char, int chr)
661 /* Send an ACK on the get if a prior put completed and set the
668 /* On the first get char, fill the transmit buffer and then
669 * take from the get_string.
671 if (get_buf_cnt == 0) {
672 if (ts.tst[ts.idx].get_handler)
673 ts.tst[ts.idx].get_handler(ts.tst[ts.idx].get);
675 fill_get_buf(ts.tst[ts.idx].get);
678 if (get_buf[get_buf_cnt] == '\0') {
679 eprintk("kgdbts: ERROR GET: EOB on '%s' at %i\n",
684 ret = get_buf[get_buf_cnt];
689 /* This callback is a put char which is when kgdb sends data to
692 if (ts.tst[ts.idx].get[0] == '\0' &&
693 ts.tst[ts.idx].put[0] == '\0') {
694 eprintk("kgdbts: ERROR: beyond end of test on"
695 " '%s' line %i\n", ts.name, ts.idx);
699 if (put_buf_cnt >= BUFMAX) {
700 eprintk("kgdbts: ERROR: put buffer overflow on"
701 " '%s' line %i\n", ts.name, ts.idx);
705 /* Ignore everything until the first valid packet start '$' */
706 if (put_buf_cnt == 0 && chr != '$')
709 put_buf[put_buf_cnt] = chr;
712 /* End of packet == #XX so look for the '#' */
713 if (put_buf_cnt > 3 && put_buf[put_buf_cnt - 3] == '#') {
714 put_buf[put_buf_cnt] = '\0';
715 v2printk("put%i: %s\n", ts.idx, put_buf);
716 /* Trigger check here */
717 if (ts.validate_put && ts.validate_put(put_buf)) {
718 eprintk("kgdbts: ERROR PUT: end of test "
719 "buffer on '%s' line %i expected %s got %s\n",
720 ts.name, ts.idx, ts.tst[ts.idx].put, put_buf);
730 static void init_simple_test(void)
732 memset(&ts, 0, sizeof(ts));
733 ts.run_test = run_simple_test;
734 ts.validate_put = validate_simple_test;
737 static void run_plant_and_detach_test(int is_early)
739 char before[BREAK_INSTR_SIZE];
740 char after[BREAK_INSTR_SIZE];
742 probe_kernel_read(before, (char *)kgdbts_break_test,
745 ts.tst = plant_and_detach_test;
746 ts.name = "plant_and_detach_test";
747 /* Activate test with initial breakpoint */
750 probe_kernel_read(after, (char *)kgdbts_break_test,
752 if (memcmp(before, after, BREAK_INSTR_SIZE)) {
753 printk(KERN_CRIT "kgdbts: ERROR kgdb corrupted memory\n");
754 panic("kgdb memory corruption");
757 /* complete the detach test */
762 static void run_breakpoint_test(int is_hw_breakpoint)
766 if (is_hw_breakpoint) {
767 ts.tst = hw_breakpoint_test;
768 ts.name = "hw_breakpoint_test";
770 ts.tst = sw_breakpoint_test;
771 ts.name = "sw_breakpoint_test";
773 /* Activate test with initial breakpoint */
775 /* run code with the break point in it */
782 eprintk("kgdbts: ERROR %s test failed\n", ts.name);
785 static void run_hw_break_test(int is_write_test)
790 ts.tst = hw_write_break_test;
791 ts.name = "hw_write_break_test";
793 ts.tst = hw_access_break_test;
794 ts.name = "hw_access_break_test";
796 /* Activate test with initial breakpoint */
798 hw_break_val_access();
800 if (test_complete == 2)
801 eprintk("kgdbts: ERROR %s broke on access\n",
803 hw_break_val_write();
807 if (test_complete == 1)
810 eprintk("kgdbts: ERROR %s test failed\n", ts.name);
813 static void run_nmi_sleep_test(int nmi_sleep)
818 ts.tst = nmi_sleep_test;
819 ts.name = "nmi_sleep_test";
820 /* Activate test with initial breakpoint */
822 local_irq_save(flags);
823 mdelay(nmi_sleep*1000);
824 touch_nmi_watchdog();
825 local_irq_restore(flags);
826 if (test_complete != 2)
827 eprintk("kgdbts: ERROR nmi_test did not hit nmi\n");
829 if (test_complete == 1)
832 eprintk("kgdbts: ERROR %s test failed\n", ts.name);
835 static void run_bad_read_test(void)
838 ts.tst = bad_read_test;
839 ts.name = "bad_read_test";
840 /* Activate test with initial breakpoint */
844 static void run_do_fork_test(void)
847 ts.tst = do_fork_test;
848 ts.name = "do_fork_test";
849 /* Activate test with initial breakpoint */
853 static void run_sys_open_test(void)
856 ts.tst = sys_open_test;
857 ts.name = "sys_open_test";
858 /* Activate test with initial breakpoint */
862 static void run_singlestep_break_test(void)
865 ts.tst = singlestep_break_test;
866 ts.name = "singlestep_breakpoint_test";
867 /* Activate test with initial breakpoint */
873 static void kgdbts_run_tests(void)
877 int sys_open_test = 0;
880 ptr = strstr(config, "F");
882 fork_test = simple_strtol(ptr+1, NULL, 10);
883 ptr = strstr(config, "S");
885 sys_open_test = simple_strtol(ptr+1, NULL, 10);
886 ptr = strstr(config, "N");
888 nmi_sleep = simple_strtol(ptr+1, NULL, 10);
890 /* required internal KGDB tests */
891 v1printk("kgdbts:RUN plant and detach test\n");
892 run_plant_and_detach_test(0);
893 v1printk("kgdbts:RUN sw breakpoint test\n");
894 run_breakpoint_test(0);
895 v1printk("kgdbts:RUN bad memory access test\n");
897 v1printk("kgdbts:RUN singlestep breakpoint test\n");
898 run_singlestep_break_test();
900 /* ===Optional tests=== */
902 /* All HW break point tests */
903 if (arch_kgdb_ops.flags & KGDB_HW_BREAKPOINT) {
904 v1printk("kgdbts:RUN hw breakpoint test\n");
905 run_breakpoint_test(1);
906 v1printk("kgdbts:RUN hw write breakpoint test\n");
907 run_hw_break_test(1);
908 v1printk("kgdbts:RUN access write breakpoint test\n");
909 run_hw_break_test(0);
913 v1printk("kgdbts:RUN NMI sleep %i seconds test\n", nmi_sleep);
914 run_nmi_sleep_test(nmi_sleep);
917 /* If the do_fork test is run it will be the last test that is
918 * executed because a kernel thread will be spawned at the very
919 * end to unregister the debug hooks.
922 repeat_test = fork_test;
923 printk(KERN_INFO "kgdbts:RUN do_fork for %i breakpoints\n",
925 kthread_run(kgdbts_unreg_thread, 0, "kgdbts_unreg");
930 /* If the sys_open test is run it will be the last test that is
931 * executed because a kernel thread will be spawned at the very
932 * end to unregister the debug hooks.
935 repeat_test = sys_open_test;
936 printk(KERN_INFO "kgdbts:RUN sys_open for %i breakpoints\n",
938 kthread_run(kgdbts_unreg_thread, 0, "kgdbts_unreg");
942 /* Shutdown and unregister */
943 kgdb_unregister_io_module(&kgdbts_io_ops);
947 static int kgdbts_option_setup(char *opt)
949 if (strlen(opt) > MAX_CONFIG_LEN) {
950 printk(KERN_ERR "kgdbts: config string too long\n");
956 if (strstr(config, "V1"))
958 if (strstr(config, "V2"))
964 __setup("kgdbts=", kgdbts_option_setup);
966 static int configure_kgdbts(void)
970 if (!strlen(config) || isspace(config[0]))
972 err = kgdbts_option_setup(config);
977 run_plant_and_detach_test(1);
979 err = kgdb_register_io_module(&kgdbts_io_ops);
996 static int __init init_kgdbts(void)
998 /* Already configured? */
1002 return configure_kgdbts();
1005 static void cleanup_kgdbts(void)
1007 if (configured == 1)
1008 kgdb_unregister_io_module(&kgdbts_io_ops);
1011 static int kgdbts_get_char(void)
1016 val = ts.run_test(1, 0);
1021 static void kgdbts_put_char(u8 chr)
1024 ts.run_test(0, chr);
1027 static int param_set_kgdbts_var(const char *kmessage, struct kernel_param *kp)
1029 int len = strlen(kmessage);
1031 if (len >= MAX_CONFIG_LEN) {
1032 printk(KERN_ERR "kgdbts: config string too long\n");
1036 /* Only copy in the string if the init function has not run yet */
1037 if (configured < 0) {
1038 strcpy(config, kmessage);
1042 if (kgdb_connected) {
1044 "kgdbts: Cannot reconfigure while KGDB is connected.\n");
1049 strcpy(config, kmessage);
1050 /* Chop out \n char as a result of echo */
1051 if (config[len - 1] == '\n')
1052 config[len - 1] = '\0';
1054 if (configured == 1)
1057 /* Go and configure with the new params. */
1058 return configure_kgdbts();
1061 static void kgdbts_pre_exp_handler(void)
1063 /* Increment the module count when the debugger is active */
1064 if (!kgdb_connected)
1065 try_module_get(THIS_MODULE);
1068 static void kgdbts_post_exp_handler(void)
1070 /* decrement the module count when the debugger detaches */
1071 if (!kgdb_connected)
1072 module_put(THIS_MODULE);
1075 static struct kgdb_io kgdbts_io_ops = {
1077 .read_char = kgdbts_get_char,
1078 .write_char = kgdbts_put_char,
1079 .pre_exception = kgdbts_pre_exp_handler,
1080 .post_exception = kgdbts_post_exp_handler,
1083 module_init(init_kgdbts);
1084 module_exit(cleanup_kgdbts);
1085 module_param_call(kgdbts, param_set_kgdbts_var, param_get_string, &kps, 0644);
1086 MODULE_PARM_DESC(kgdbts, "<A|V1|V2>[F#|S#][N#]");
1087 MODULE_DESCRIPTION("KGDB Test Suite");
1088 MODULE_LICENSE("GPL");
1089 MODULE_AUTHOR("Wind River Systems, Inc.");