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
50 * I## = Run the single step test ## iterations
52 * NOTE: that the do_fork and sys_open tests are mutually exclusive.
54 * To invoke the kgdb test suite from boot you use a kernel start
55 * argument as follows:
57 * Or if you wanted to perform the NMI test for 6 seconds and do_fork
58 * test for 100 forks, you could use:
59 * kgdbts=V1N6F100 kgdbwait
61 * The test suite can also be invoked at run time with:
62 * echo kgdbts=V1N6F100 > /sys/module/kgdbts/parameters/kgdbts
63 * Or as another example:
64 * echo kgdbts=V2 > /sys/module/kgdbts/parameters/kgdbts
66 * When developing a new kgdb arch specific implementation or
67 * using these tests for the purpose of regression testing,
68 * several invocations are required.
70 * 1) Boot with the test suite enabled by using the kernel arguments
71 * "kgdbts=V1F100 kgdbwait"
72 * ## If kgdb arch specific implementation has NMI use
75 * 2) After the system boot run the basic test.
76 * echo kgdbts=V1 > /sys/module/kgdbts/parameters/kgdbts
78 * 3) Run the concurrency tests. It is best to use n+1
79 * while loops where n is the number of cpus you have
80 * in your system. The example below uses only two
83 * ## This tests break points on sys_open
84 * while [ 1 ] ; do find / > /dev/null 2>&1 ; done &
85 * while [ 1 ] ; do find / > /dev/null 2>&1 ; done &
86 * echo kgdbts=V1S10000 > /sys/module/kgdbts/parameters/kgdbts
87 * fg # and hit control-c
88 * fg # and hit control-c
89 * ## This tests break points on do_fork
90 * while [ 1 ] ; do date > /dev/null ; done &
91 * while [ 1 ] ; do date > /dev/null ; done &
92 * echo kgdbts=V1F1000 > /sys/module/kgdbts/parameters/kgdbts
93 * fg # and hit control-c
97 #include <linux/kernel.h>
98 #include <linux/kgdb.h>
99 #include <linux/ctype.h>
100 #include <linux/uaccess.h>
101 #include <linux/syscalls.h>
102 #include <linux/nmi.h>
103 #include <linux/delay.h>
104 #include <linux/kthread.h>
105 #include <linux/delay.h>
107 #define v1printk(a...) do { \
109 printk(KERN_INFO a); \
111 #define v2printk(a...) do { \
113 printk(KERN_INFO a); \
114 touch_nmi_watchdog(); \
116 #define eprintk(a...) do { \
117 printk(KERN_ERR a); \
120 #define MAX_CONFIG_LEN 40
122 static const char hexchars[] = "0123456789abcdef";
123 static struct kgdb_io kgdbts_io_ops;
124 static char get_buf[BUFMAX];
125 static int get_buf_cnt;
126 static char put_buf[BUFMAX];
127 static int put_buf_cnt;
128 static char scratch_buf[BUFMAX];
130 static int repeat_test;
131 static int test_complete;
133 static int final_ack;
134 static int hw_break_val;
135 static int hw_break_val2;
136 #if defined(CONFIG_ARM) || defined(CONFIG_MIPS) || defined(CONFIG_SPARC)
137 static int arch_needs_sstep_emulation = 1;
139 static int arch_needs_sstep_emulation;
141 static unsigned long sstep_addr;
142 static int sstep_state;
144 /* Storage for the registers, in GDB format. */
145 static unsigned long kgdbts_gdb_regs[(NUMREGBYTES +
146 sizeof(unsigned long) - 1) /
147 sizeof(unsigned long)];
148 static struct pt_regs kgdbts_regs;
150 /* -1 = init not run yet, 0 = unconfigured, 1 = configured. */
151 static int configured = -1;
153 #ifdef CONFIG_KGDB_TESTS_BOOT_STRING
154 static char config[MAX_CONFIG_LEN] = CONFIG_KGDB_TESTS_BOOT_STRING;
156 static char config[MAX_CONFIG_LEN];
158 static struct kparam_string kps = {
160 .maxlen = MAX_CONFIG_LEN,
163 static void fill_get_buf(char *buf);
168 void (*get_handler)(char *);
169 int (*put_handler)(char *, char *);
174 struct test_struct *tst;
176 int (*run_test) (int, int);
177 int (*validate_put) (char *);
180 static struct test_state ts;
182 static int kgdbts_unreg_thread(void *ptr)
184 /* Wait until the tests are complete and then ungresiter the I/O
188 msleep_interruptible(1500);
191 kgdb_unregister_io_module(&kgdbts_io_ops);
197 /* This is noinline such that it can be used for a single location to
200 static noinline void kgdbts_break_test(void)
202 v2printk("kgdbts: breakpoint complete\n");
205 /* Lookup symbol info in the kernel */
206 static unsigned long lookup_addr(char *arg)
208 unsigned long addr = 0;
210 if (!strcmp(arg, "kgdbts_break_test"))
211 addr = (unsigned long)kgdbts_break_test;
212 else if (!strcmp(arg, "sys_open"))
213 addr = (unsigned long)sys_open;
214 else if (!strcmp(arg, "do_fork"))
215 addr = (unsigned long)do_fork;
216 else if (!strcmp(arg, "hw_break_val"))
217 addr = (unsigned long)&hw_break_val;
221 static void break_helper(char *bp_type, char *arg, unsigned long vaddr)
226 addr = lookup_addr(arg);
230 sprintf(scratch_buf, "%s,%lx,%i", bp_type, addr,
232 fill_get_buf(scratch_buf);
235 static void sw_break(char *arg)
237 break_helper("Z0", arg, 0);
240 static void sw_rem_break(char *arg)
242 break_helper("z0", arg, 0);
245 static void hw_break(char *arg)
247 break_helper("Z1", arg, 0);
250 static void hw_rem_break(char *arg)
252 break_helper("z1", arg, 0);
255 static void hw_write_break(char *arg)
257 break_helper("Z2", arg, 0);
260 static void hw_rem_write_break(char *arg)
262 break_helper("z2", arg, 0);
265 static void hw_access_break(char *arg)
267 break_helper("Z4", arg, 0);
270 static void hw_rem_access_break(char *arg)
272 break_helper("z4", arg, 0);
275 static void hw_break_val_access(void)
277 hw_break_val2 = hw_break_val;
280 static void hw_break_val_write(void)
285 static int check_and_rewind_pc(char *put_str, char *arg)
287 unsigned long addr = lookup_addr(arg);
290 kgdb_hex2mem(&put_str[1], (char *)kgdbts_gdb_regs,
292 gdb_regs_to_pt_regs(kgdbts_gdb_regs, &kgdbts_regs);
293 v2printk("Stopped at IP: %lx\n", instruction_pointer(&kgdbts_regs));
295 /* On x86 a breakpoint stop requires it to be decremented */
296 if (addr + 1 == kgdbts_regs.ip)
299 if (strcmp(arg, "silent") &&
300 instruction_pointer(&kgdbts_regs) + offset != addr) {
301 eprintk("kgdbts: BP mismatch %lx expected %lx\n",
302 instruction_pointer(&kgdbts_regs) + offset, addr);
306 /* On x86 adjust the instruction pointer if needed */
307 kgdbts_regs.ip += offset;
312 static int check_single_step(char *put_str, char *arg)
314 unsigned long addr = lookup_addr(arg);
316 * From an arch indepent point of view the instruction pointer
317 * should be on a different instruction
319 kgdb_hex2mem(&put_str[1], (char *)kgdbts_gdb_regs,
321 gdb_regs_to_pt_regs(kgdbts_gdb_regs, &kgdbts_regs);
322 v2printk("Singlestep stopped at IP: %lx\n",
323 instruction_pointer(&kgdbts_regs));
324 if (instruction_pointer(&kgdbts_regs) == addr) {
325 eprintk("kgdbts: SingleStep failed at %lx\n",
326 instruction_pointer(&kgdbts_regs));
333 static void write_regs(char *arg)
335 memset(scratch_buf, 0, sizeof(scratch_buf));
336 scratch_buf[0] = 'G';
337 pt_regs_to_gdb_regs(kgdbts_gdb_regs, &kgdbts_regs);
338 kgdb_mem2hex((char *)kgdbts_gdb_regs, &scratch_buf[1], NUMREGBYTES);
339 fill_get_buf(scratch_buf);
342 static void skip_back_repeat_test(char *arg)
344 int go_back = simple_strtol(arg, NULL, 10);
347 if (repeat_test <= 0)
351 fill_get_buf(ts.tst[ts.idx].get);
354 static int got_break(char *put_str, char *arg)
357 if (!strncmp(put_str+1, arg, 2)) {
358 if (!strncmp(arg, "T0", 2))
365 static void emul_sstep_get(char *arg)
367 if (!arch_needs_sstep_emulation) {
371 switch (sstep_state) {
373 v2printk("Emulate single step\n");
374 /* Start by looking at the current PC */
379 break_helper("Z0", NULL, sstep_addr);
386 /* Clear breakpoint */
387 break_helper("z0", NULL, sstep_addr);
390 eprintk("kgdbts: ERROR failed sstep get emulation\n");
395 static int emul_sstep_put(char *put_str, char *arg)
397 if (!arch_needs_sstep_emulation) {
398 if (!strncmp(put_str+1, arg, 2))
402 switch (sstep_state) {
404 /* validate the "g" packet to get the IP */
405 kgdb_hex2mem(&put_str[1], (char *)kgdbts_gdb_regs,
407 gdb_regs_to_pt_regs(kgdbts_gdb_regs, &kgdbts_regs);
408 v2printk("Stopped at IP: %lx\n",
409 instruction_pointer(&kgdbts_regs));
410 /* Want to stop at IP + break instruction size by default */
411 sstep_addr = instruction_pointer(&kgdbts_regs) +
415 if (strncmp(put_str, "$OK", 3)) {
416 eprintk("kgdbts: failed sstep break set\n");
421 if (strncmp(put_str, "$T0", 3)) {
422 eprintk("kgdbts: failed continue sstep\n");
427 if (strncmp(put_str, "$OK", 3)) {
428 eprintk("kgdbts: failed sstep break unset\n");
431 /* Single step is complete so continue on! */
435 eprintk("kgdbts: ERROR failed sstep put emulation\n");
438 /* Continue on the same test line until emulation is complete */
443 static int final_ack_set(char *put_str, char *arg)
445 if (strncmp(put_str+1, arg, 2))
451 * Test to plant a breakpoint and detach, which should clear out the
452 * breakpoint and restore the original instruction.
454 static struct test_struct plant_and_detach_test[] = {
455 { "?", "S0*" }, /* Clear break points */
456 { "kgdbts_break_test", "OK", sw_break, }, /* set sw breakpoint */
457 { "D", "OK" }, /* Detach */
462 * Simple test to write in a software breakpoint, check for the
463 * correct stop location and detach.
465 static struct test_struct sw_breakpoint_test[] = {
466 { "?", "S0*" }, /* Clear break points */
467 { "kgdbts_break_test", "OK", sw_break, }, /* set sw breakpoint */
468 { "c", "T0*", }, /* Continue */
469 { "g", "kgdbts_break_test", NULL, check_and_rewind_pc },
470 { "write", "OK", write_regs },
471 { "kgdbts_break_test", "OK", sw_rem_break }, /*remove breakpoint */
472 { "D", "OK" }, /* Detach */
473 { "D", "OK", NULL, got_break }, /* On success we made it here */
478 * Test a known bad memory read location to test the fault handler and
479 * read bytes 1-8 at the bad address
481 static struct test_struct bad_read_test[] = {
482 { "?", "S0*" }, /* Clear break points */
483 { "m0,1", "E*" }, /* read 1 byte at address 1 */
484 { "m0,2", "E*" }, /* read 1 byte at address 2 */
485 { "m0,3", "E*" }, /* read 1 byte at address 3 */
486 { "m0,4", "E*" }, /* read 1 byte at address 4 */
487 { "m0,5", "E*" }, /* read 1 byte at address 5 */
488 { "m0,6", "E*" }, /* read 1 byte at address 6 */
489 { "m0,7", "E*" }, /* read 1 byte at address 7 */
490 { "m0,8", "E*" }, /* read 1 byte at address 8 */
491 { "D", "OK" }, /* Detach which removes all breakpoints and continues */
496 * Test for hitting a breakpoint, remove it, single step, plant it
499 static struct test_struct singlestep_break_test[] = {
500 { "?", "S0*" }, /* Clear break points */
501 { "kgdbts_break_test", "OK", sw_break, }, /* set sw breakpoint */
502 { "c", "T0*", }, /* Continue */
503 { "g", "kgdbts_break_test", NULL, check_and_rewind_pc },
504 { "write", "OK", write_regs }, /* Write registers */
505 { "kgdbts_break_test", "OK", sw_rem_break }, /*remove breakpoint */
506 { "s", "T0*", emul_sstep_get, emul_sstep_put }, /* Single step */
507 { "g", "kgdbts_break_test", NULL, check_single_step },
508 { "kgdbts_break_test", "OK", sw_break, }, /* set sw breakpoint */
509 { "c", "T0*", }, /* Continue */
510 { "g", "kgdbts_break_test", NULL, check_and_rewind_pc },
511 { "write", "OK", write_regs }, /* Write registers */
512 { "D", "OK" }, /* Remove all breakpoints and continues */
517 * Test for hitting a breakpoint at do_fork for what ever the number
518 * of iterations required by the variable repeat_test.
520 static struct test_struct do_fork_test[] = {
521 { "?", "S0*" }, /* Clear break points */
522 { "do_fork", "OK", sw_break, }, /* set sw breakpoint */
523 { "c", "T0*", }, /* Continue */
524 { "g", "do_fork", NULL, check_and_rewind_pc }, /* check location */
525 { "write", "OK", write_regs }, /* Write registers */
526 { "do_fork", "OK", sw_rem_break }, /*remove breakpoint */
527 { "s", "T0*", emul_sstep_get, emul_sstep_put }, /* Single step */
528 { "g", "do_fork", NULL, check_single_step },
529 { "do_fork", "OK", sw_break, }, /* set sw breakpoint */
530 { "7", "T0*", skip_back_repeat_test }, /* Loop based on repeat_test */
531 { "D", "OK", NULL, final_ack_set }, /* detach and unregister I/O */
535 /* Test for hitting a breakpoint at sys_open for what ever the number
536 * of iterations required by the variable repeat_test.
538 static struct test_struct sys_open_test[] = {
539 { "?", "S0*" }, /* Clear break points */
540 { "sys_open", "OK", sw_break, }, /* set sw breakpoint */
541 { "c", "T0*", }, /* Continue */
542 { "g", "sys_open", NULL, check_and_rewind_pc }, /* check location */
543 { "write", "OK", write_regs }, /* Write registers */
544 { "sys_open", "OK", sw_rem_break }, /*remove breakpoint */
545 { "s", "T0*", emul_sstep_get, emul_sstep_put }, /* Single step */
546 { "g", "sys_open", NULL, check_single_step },
547 { "sys_open", "OK", sw_break, }, /* set sw breakpoint */
548 { "7", "T0*", skip_back_repeat_test }, /* Loop based on repeat_test */
549 { "D", "OK", NULL, final_ack_set }, /* detach and unregister I/O */
554 * Test for hitting a simple hw breakpoint
556 static struct test_struct hw_breakpoint_test[] = {
557 { "?", "S0*" }, /* Clear break points */
558 { "kgdbts_break_test", "OK", hw_break, }, /* set hw breakpoint */
559 { "c", "T0*", }, /* Continue */
560 { "g", "kgdbts_break_test", NULL, check_and_rewind_pc },
561 { "write", "OK", write_regs },
562 { "kgdbts_break_test", "OK", hw_rem_break }, /*remove breakpoint */
563 { "D", "OK" }, /* Detach */
564 { "D", "OK", NULL, got_break }, /* On success we made it here */
569 * Test for hitting a hw write breakpoint
571 static struct test_struct hw_write_break_test[] = {
572 { "?", "S0*" }, /* Clear break points */
573 { "hw_break_val", "OK", hw_write_break, }, /* set hw breakpoint */
574 { "c", "T0*", NULL, got_break }, /* Continue */
575 { "g", "silent", NULL, check_and_rewind_pc },
576 { "write", "OK", write_regs },
577 { "hw_break_val", "OK", hw_rem_write_break }, /*remove breakpoint */
578 { "D", "OK" }, /* Detach */
579 { "D", "OK", NULL, got_break }, /* On success we made it here */
584 * Test for hitting a hw access breakpoint
586 static struct test_struct hw_access_break_test[] = {
587 { "?", "S0*" }, /* Clear break points */
588 { "hw_break_val", "OK", hw_access_break, }, /* set hw breakpoint */
589 { "c", "T0*", NULL, got_break }, /* Continue */
590 { "g", "silent", NULL, check_and_rewind_pc },
591 { "write", "OK", write_regs },
592 { "hw_break_val", "OK", hw_rem_access_break }, /*remove breakpoint */
593 { "D", "OK" }, /* Detach */
594 { "D", "OK", NULL, got_break }, /* On success we made it here */
599 * Test for hitting a hw access breakpoint
601 static struct test_struct nmi_sleep_test[] = {
602 { "?", "S0*" }, /* Clear break points */
603 { "c", "T0*", NULL, got_break }, /* Continue */
604 { "D", "OK" }, /* Detach */
605 { "D", "OK", NULL, got_break }, /* On success we made it here */
609 static void fill_get_buf(char *buf)
611 unsigned char checksum = 0;
615 strcpy(get_buf, "$");
616 strcat(get_buf, buf);
617 while ((ch = buf[count])) {
621 strcat(get_buf, "#");
622 get_buf[count + 2] = hexchars[checksum >> 4];
623 get_buf[count + 3] = hexchars[checksum & 0xf];
624 get_buf[count + 4] = '\0';
625 v2printk("get%i: %s\n", ts.idx, get_buf);
628 static int validate_simple_test(char *put_str)
632 if (ts.tst[ts.idx].put_handler)
633 return ts.tst[ts.idx].put_handler(put_str,
636 chk_str = ts.tst[ts.idx].put;
640 while (*chk_str != '\0' && *put_str != '\0') {
641 /* If someone does a * to match the rest of the string, allow
642 * it, or stop if the recieved string is complete.
644 if (*put_str == '#' || *chk_str == '*')
646 if (*put_str != *chk_str)
652 if (*chk_str == '\0' && (*put_str == '\0' || *put_str == '#'))
658 static int run_simple_test(int is_get_char, int chr)
662 /* Send an ACK on the get if a prior put completed and set the
669 /* On the first get char, fill the transmit buffer and then
670 * take from the get_string.
672 if (get_buf_cnt == 0) {
673 if (ts.tst[ts.idx].get_handler)
674 ts.tst[ts.idx].get_handler(ts.tst[ts.idx].get);
676 fill_get_buf(ts.tst[ts.idx].get);
679 if (get_buf[get_buf_cnt] == '\0') {
680 eprintk("kgdbts: ERROR GET: EOB on '%s' at %i\n",
685 ret = get_buf[get_buf_cnt];
690 /* This callback is a put char which is when kgdb sends data to
693 if (ts.tst[ts.idx].get[0] == '\0' &&
694 ts.tst[ts.idx].put[0] == '\0') {
695 eprintk("kgdbts: ERROR: beyond end of test on"
696 " '%s' line %i\n", ts.name, ts.idx);
700 if (put_buf_cnt >= BUFMAX) {
701 eprintk("kgdbts: ERROR: put buffer overflow on"
702 " '%s' line %i\n", ts.name, ts.idx);
706 /* Ignore everything until the first valid packet start '$' */
707 if (put_buf_cnt == 0 && chr != '$')
710 put_buf[put_buf_cnt] = chr;
713 /* End of packet == #XX so look for the '#' */
714 if (put_buf_cnt > 3 && put_buf[put_buf_cnt - 3] == '#') {
715 put_buf[put_buf_cnt] = '\0';
716 v2printk("put%i: %s\n", ts.idx, put_buf);
717 /* Trigger check here */
718 if (ts.validate_put && ts.validate_put(put_buf)) {
719 eprintk("kgdbts: ERROR PUT: end of test "
720 "buffer on '%s' line %i expected %s got %s\n",
721 ts.name, ts.idx, ts.tst[ts.idx].put, put_buf);
731 static void init_simple_test(void)
733 memset(&ts, 0, sizeof(ts));
734 ts.run_test = run_simple_test;
735 ts.validate_put = validate_simple_test;
738 static void run_plant_and_detach_test(int is_early)
740 char before[BREAK_INSTR_SIZE];
741 char after[BREAK_INSTR_SIZE];
743 probe_kernel_read(before, (char *)kgdbts_break_test,
746 ts.tst = plant_and_detach_test;
747 ts.name = "plant_and_detach_test";
748 /* Activate test with initial breakpoint */
751 probe_kernel_read(after, (char *)kgdbts_break_test,
753 if (memcmp(before, after, BREAK_INSTR_SIZE)) {
754 printk(KERN_CRIT "kgdbts: ERROR kgdb corrupted memory\n");
755 panic("kgdb memory corruption");
758 /* complete the detach test */
763 static void run_breakpoint_test(int is_hw_breakpoint)
767 if (is_hw_breakpoint) {
768 ts.tst = hw_breakpoint_test;
769 ts.name = "hw_breakpoint_test";
771 ts.tst = sw_breakpoint_test;
772 ts.name = "sw_breakpoint_test";
774 /* Activate test with initial breakpoint */
776 /* run code with the break point in it */
783 eprintk("kgdbts: ERROR %s test failed\n", ts.name);
786 static void run_hw_break_test(int is_write_test)
791 ts.tst = hw_write_break_test;
792 ts.name = "hw_write_break_test";
794 ts.tst = hw_access_break_test;
795 ts.name = "hw_access_break_test";
797 /* Activate test with initial breakpoint */
799 hw_break_val_access();
801 if (test_complete == 2)
802 eprintk("kgdbts: ERROR %s broke on access\n",
804 hw_break_val_write();
808 if (test_complete == 1)
811 eprintk("kgdbts: ERROR %s test failed\n", ts.name);
814 static void run_nmi_sleep_test(int nmi_sleep)
819 ts.tst = nmi_sleep_test;
820 ts.name = "nmi_sleep_test";
821 /* Activate test with initial breakpoint */
823 local_irq_save(flags);
824 mdelay(nmi_sleep*1000);
825 touch_nmi_watchdog();
826 local_irq_restore(flags);
827 if (test_complete != 2)
828 eprintk("kgdbts: ERROR nmi_test did not hit nmi\n");
830 if (test_complete == 1)
833 eprintk("kgdbts: ERROR %s test failed\n", ts.name);
836 static void run_bad_read_test(void)
839 ts.tst = bad_read_test;
840 ts.name = "bad_read_test";
841 /* Activate test with initial breakpoint */
845 static void run_do_fork_test(void)
848 ts.tst = do_fork_test;
849 ts.name = "do_fork_test";
850 /* Activate test with initial breakpoint */
854 static void run_sys_open_test(void)
857 ts.tst = sys_open_test;
858 ts.name = "sys_open_test";
859 /* Activate test with initial breakpoint */
863 static void run_singlestep_break_test(void)
866 ts.tst = singlestep_break_test;
867 ts.name = "singlestep_breakpoint_test";
868 /* Activate test with initial breakpoint */
874 static void kgdbts_run_tests(void)
878 int do_sys_open_test = 0;
879 int sstep_test = 1000;
883 ptr = strstr(config, "F");
885 fork_test = simple_strtol(ptr + 1, NULL, 10);
886 ptr = strstr(config, "S");
888 do_sys_open_test = simple_strtol(ptr + 1, NULL, 10);
889 ptr = strstr(config, "N");
891 nmi_sleep = simple_strtol(ptr+1, NULL, 10);
892 ptr = strstr(config, "I");
894 sstep_test = simple_strtol(ptr+1, NULL, 10);
896 /* required internal KGDB tests */
897 v1printk("kgdbts:RUN plant and detach test\n");
898 run_plant_and_detach_test(0);
899 v1printk("kgdbts:RUN sw breakpoint test\n");
900 run_breakpoint_test(0);
901 v1printk("kgdbts:RUN bad memory access test\n");
903 v1printk("kgdbts:RUN singlestep test %i iterations\n", sstep_test);
904 for (i = 0; i < sstep_test; i++) {
905 run_singlestep_break_test();
907 v1printk("kgdbts:RUN singlestep [%i/%i]\n",
911 /* ===Optional tests=== */
913 /* All HW break point tests */
914 if (arch_kgdb_ops.flags & KGDB_HW_BREAKPOINT) {
915 v1printk("kgdbts:RUN hw breakpoint test\n");
916 run_breakpoint_test(1);
917 v1printk("kgdbts:RUN hw write breakpoint test\n");
918 run_hw_break_test(1);
919 v1printk("kgdbts:RUN access write breakpoint test\n");
920 run_hw_break_test(0);
924 v1printk("kgdbts:RUN NMI sleep %i seconds test\n", nmi_sleep);
925 run_nmi_sleep_test(nmi_sleep);
928 /* If the do_fork test is run it will be the last test that is
929 * executed because a kernel thread will be spawned at the very
930 * end to unregister the debug hooks.
933 repeat_test = fork_test;
934 printk(KERN_INFO "kgdbts:RUN do_fork for %i breakpoints\n",
936 kthread_run(kgdbts_unreg_thread, NULL, "kgdbts_unreg");
941 /* If the sys_open test is run it will be the last test that is
942 * executed because a kernel thread will be spawned at the very
943 * end to unregister the debug hooks.
945 if (do_sys_open_test) {
946 repeat_test = do_sys_open_test;
947 printk(KERN_INFO "kgdbts:RUN sys_open for %i breakpoints\n",
949 kthread_run(kgdbts_unreg_thread, NULL, "kgdbts_unreg");
953 /* Shutdown and unregister */
954 kgdb_unregister_io_module(&kgdbts_io_ops);
958 static int kgdbts_option_setup(char *opt)
960 if (strlen(opt) > MAX_CONFIG_LEN) {
961 printk(KERN_ERR "kgdbts: config string too long\n");
967 if (strstr(config, "V1"))
969 if (strstr(config, "V2"))
975 __setup("kgdbts=", kgdbts_option_setup);
977 static int configure_kgdbts(void)
981 if (!strlen(config) || isspace(config[0]))
983 err = kgdbts_option_setup(config);
988 run_plant_and_detach_test(1);
990 err = kgdb_register_io_module(&kgdbts_io_ops);
1007 static int __init init_kgdbts(void)
1009 /* Already configured? */
1010 if (configured == 1)
1013 return configure_kgdbts();
1016 static void cleanup_kgdbts(void)
1018 if (configured == 1)
1019 kgdb_unregister_io_module(&kgdbts_io_ops);
1022 static int kgdbts_get_char(void)
1027 val = ts.run_test(1, 0);
1032 static void kgdbts_put_char(u8 chr)
1035 ts.run_test(0, chr);
1038 static int param_set_kgdbts_var(const char *kmessage, struct kernel_param *kp)
1040 int len = strlen(kmessage);
1042 if (len >= MAX_CONFIG_LEN) {
1043 printk(KERN_ERR "kgdbts: config string too long\n");
1047 /* Only copy in the string if the init function has not run yet */
1048 if (configured < 0) {
1049 strcpy(config, kmessage);
1053 if (kgdb_connected) {
1055 "kgdbts: Cannot reconfigure while KGDB is connected.\n");
1060 strcpy(config, kmessage);
1061 /* Chop out \n char as a result of echo */
1062 if (config[len - 1] == '\n')
1063 config[len - 1] = '\0';
1065 if (configured == 1)
1068 /* Go and configure with the new params. */
1069 return configure_kgdbts();
1072 static void kgdbts_pre_exp_handler(void)
1074 /* Increment the module count when the debugger is active */
1075 if (!kgdb_connected)
1076 try_module_get(THIS_MODULE);
1079 static void kgdbts_post_exp_handler(void)
1081 /* decrement the module count when the debugger detaches */
1082 if (!kgdb_connected)
1083 module_put(THIS_MODULE);
1086 static struct kgdb_io kgdbts_io_ops = {
1088 .read_char = kgdbts_get_char,
1089 .write_char = kgdbts_put_char,
1090 .pre_exception = kgdbts_pre_exp_handler,
1091 .post_exception = kgdbts_post_exp_handler,
1094 module_init(init_kgdbts);
1095 module_exit(cleanup_kgdbts);
1096 module_param_call(kgdbts, param_set_kgdbts_var, param_get_string, &kps, 0644);
1097 MODULE_PARM_DESC(kgdbts, "<A|V1|V2>[F#|S#][N#]");
1098 MODULE_DESCRIPTION("KGDB Test Suite");
1099 MODULE_LICENSE("GPL");
1100 MODULE_AUTHOR("Wind River Systems, Inc.");