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) || defined(CONFIG_SPARC)
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", NULL
, sstep_addr
);
385 /* Clear breakpoint */
386 break_helper("z0", NULL
, 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", NULL
, 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", NULL
, got_break
}, /* On success 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", NULL
, 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", NULL
, check_single_step
},
507 { "kgdbts_break_test", "OK", sw_break
, }, /* set sw breakpoint */
508 { "c", "T0*", }, /* Continue */
509 { "g", "kgdbts_break_test", NULL
, 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", NULL
, 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", NULL
, 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", NULL
, 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", NULL
, 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", NULL
, 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", NULL
, 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", NULL
, 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", NULL
, got_break
}, /* On success 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*", NULL
, got_break
}, /* Continue */
574 { "g", "silent", NULL
, 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", NULL
, got_break
}, /* On success 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*", NULL
, got_break
}, /* Continue */
589 { "g", "silent", NULL
, 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", NULL
, got_break
}, /* On success 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*", NULL
, got_break
}, /* Continue */
603 { "D", "OK" }, /* Detach */
604 { "D", "OK", NULL
, got_break
}, /* On success 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 do_sys_open_test
= 0;
880 ptr
= strstr(config
, "F");
882 fork_test
= simple_strtol(ptr
+ 1, NULL
, 10);
883 ptr
= strstr(config
, "S");
885 do_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
, NULL
, "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.
934 if (do_sys_open_test
) {
935 repeat_test
= do_sys_open_test
;
936 printk(KERN_INFO
"kgdbts:RUN sys_open for %i breakpoints\n",
938 kthread_run(kgdbts_unreg_thread
, NULL
, "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.");