diff options
Diffstat (limited to 'arch/ppc/xmon/xmon.c')
-rw-r--r-- | arch/ppc/xmon/xmon.c | 1780 |
1 files changed, 0 insertions, 1780 deletions
diff --git a/arch/ppc/xmon/xmon.c b/arch/ppc/xmon/xmon.c deleted file mode 100644 index b1a91744fd2d..000000000000 --- a/arch/ppc/xmon/xmon.c +++ /dev/null | |||
@@ -1,1780 +0,0 @@ | |||
1 | /* | ||
2 | * Routines providing a simple monitor for use on the PowerMac. | ||
3 | * | ||
4 | * Copyright (C) 1996 Paul Mackerras. | ||
5 | */ | ||
6 | #include <linux/errno.h> | ||
7 | #include <linux/sched.h> | ||
8 | #include <linux/smp.h> | ||
9 | #include <linux/interrupt.h> | ||
10 | #include <linux/bitops.h> | ||
11 | #include <linux/kallsyms.h> | ||
12 | #include <asm/ptrace.h> | ||
13 | #include <asm/string.h> | ||
14 | #include <asm/machdep.h> | ||
15 | #include <asm/xmon.h> | ||
16 | #include "nonstdio.h" | ||
17 | #include "privinst.h" | ||
18 | |||
19 | #define scanhex xmon_scanhex | ||
20 | #define skipbl xmon_skipbl | ||
21 | |||
22 | #ifdef CONFIG_SMP | ||
23 | static unsigned long cpus_in_xmon = 0; | ||
24 | static unsigned long got_xmon = 0; | ||
25 | static volatile int take_xmon = -1; | ||
26 | #endif /* CONFIG_SMP */ | ||
27 | |||
28 | static unsigned adrs; | ||
29 | static int size = 1; | ||
30 | static unsigned ndump = 64; | ||
31 | static unsigned nidump = 16; | ||
32 | static unsigned ncsum = 4096; | ||
33 | static int termch; | ||
34 | |||
35 | static u_int bus_error_jmp[100]; | ||
36 | #define setjmp xmon_setjmp | ||
37 | #define longjmp xmon_longjmp | ||
38 | |||
39 | /* Breakpoint stuff */ | ||
40 | struct bpt { | ||
41 | unsigned address; | ||
42 | unsigned instr; | ||
43 | unsigned count; | ||
44 | unsigned char enabled; | ||
45 | }; | ||
46 | |||
47 | #define NBPTS 16 | ||
48 | static struct bpt bpts[NBPTS]; | ||
49 | static struct bpt dabr; | ||
50 | static struct bpt iabr; | ||
51 | static unsigned bpinstr = 0x7fe00008; /* trap */ | ||
52 | |||
53 | /* Prototypes */ | ||
54 | extern void (*debugger_fault_handler)(struct pt_regs *); | ||
55 | static int cmds(struct pt_regs *); | ||
56 | static int mread(unsigned, void *, int); | ||
57 | static int mwrite(unsigned, void *, int); | ||
58 | static void handle_fault(struct pt_regs *); | ||
59 | static void byterev(unsigned char *, int); | ||
60 | static void memex(void); | ||
61 | static int bsesc(void); | ||
62 | static void dump(void); | ||
63 | static void prdump(unsigned, int); | ||
64 | #ifdef __MWERKS__ | ||
65 | static void prndump(unsigned, int); | ||
66 | static int nvreadb(unsigned); | ||
67 | #endif | ||
68 | static int ppc_inst_dump(unsigned, int); | ||
69 | void print_address(unsigned); | ||
70 | static int getsp(void); | ||
71 | static void dump_hash_table(void); | ||
72 | static void backtrace(struct pt_regs *); | ||
73 | static void excprint(struct pt_regs *); | ||
74 | static void prregs(struct pt_regs *); | ||
75 | static void memops(int); | ||
76 | static void memlocate(void); | ||
77 | static void memzcan(void); | ||
78 | static void memdiffs(unsigned char *, unsigned char *, unsigned, unsigned); | ||
79 | int skipbl(void); | ||
80 | int scanhex(unsigned *valp); | ||
81 | static void scannl(void); | ||
82 | static int hexdigit(int); | ||
83 | void getstring(char *, int); | ||
84 | static void flush_input(void); | ||
85 | static int inchar(void); | ||
86 | static void take_input(char *); | ||
87 | /* static void openforth(void); */ | ||
88 | static unsigned read_spr(int); | ||
89 | static void write_spr(int, unsigned); | ||
90 | static void super_regs(void); | ||
91 | static void symbol_lookup(void); | ||
92 | static void remove_bpts(void); | ||
93 | static void insert_bpts(void); | ||
94 | static struct bpt *at_breakpoint(unsigned pc); | ||
95 | static void bpt_cmds(void); | ||
96 | void cacheflush(void); | ||
97 | #ifdef CONFIG_SMP | ||
98 | static void cpu_cmd(void); | ||
99 | #endif /* CONFIG_SMP */ | ||
100 | static void csum(void); | ||
101 | static void bootcmds(void); | ||
102 | static void proccall(void); | ||
103 | static void printtime(void); | ||
104 | |||
105 | extern int print_insn_big_powerpc(FILE *, unsigned long, unsigned); | ||
106 | extern void printf(const char *fmt, ...); | ||
107 | extern int putchar(int ch); | ||
108 | extern int setjmp(u_int *); | ||
109 | extern void longjmp(u_int *, int); | ||
110 | |||
111 | extern void xmon_enter(void); | ||
112 | extern void xmon_leave(void); | ||
113 | |||
114 | static unsigned start_tb[NR_CPUS][2]; | ||
115 | static unsigned stop_tb[NR_CPUS][2]; | ||
116 | |||
117 | #define GETWORD(v) (((v)[0] << 24) + ((v)[1] << 16) + ((v)[2] << 8) + (v)[3]) | ||
118 | |||
119 | #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ | ||
120 | || ('a' <= (c) && (c) <= 'f') \ | ||
121 | || ('A' <= (c) && (c) <= 'F')) | ||
122 | #define isalnum(c) (('0' <= (c) && (c) <= '9') \ | ||
123 | || ('a' <= (c) && (c) <= 'z') \ | ||
124 | || ('A' <= (c) && (c) <= 'Z')) | ||
125 | #define isspace(c) (c == ' ' || c == '\t' || c == 10 || c == 13 || c == 0) | ||
126 | |||
127 | static char *help_string = "\ | ||
128 | Commands:\n\ | ||
129 | d dump bytes\n\ | ||
130 | di dump instructions\n\ | ||
131 | df dump float values\n\ | ||
132 | dd dump double values\n\ | ||
133 | e print exception information\n\ | ||
134 | h dump hash table\n\ | ||
135 | m examine/change memory\n\ | ||
136 | mm move a block of memory\n\ | ||
137 | ms set a block of memory\n\ | ||
138 | md compare two blocks of memory\n\ | ||
139 | r print registers\n\ | ||
140 | S print special registers\n\ | ||
141 | t print backtrace\n\ | ||
142 | la lookup address\n\ | ||
143 | ls lookup symbol\n\ | ||
144 | C checksum\n\ | ||
145 | p call function with arguments\n\ | ||
146 | T print time\n\ | ||
147 | x exit monitor\n\ | ||
148 | zr reboot\n\ | ||
149 | zh halt\n\ | ||
150 | "; | ||
151 | |||
152 | static int xmon_trace[NR_CPUS]; | ||
153 | #define SSTEP 1 /* stepping because of 's' command */ | ||
154 | #define BRSTEP 2 /* stepping over breakpoint */ | ||
155 | |||
156 | #ifdef CONFIG_4xx | ||
157 | #define MSR_SSTEP_ENABLE 0x200 | ||
158 | #else | ||
159 | #define MSR_SSTEP_ENABLE 0x400 | ||
160 | #endif | ||
161 | |||
162 | static struct pt_regs *xmon_regs[NR_CPUS]; | ||
163 | |||
164 | extern inline void sync(void) | ||
165 | { | ||
166 | asm volatile("sync; isync"); | ||
167 | } | ||
168 | |||
169 | extern inline void __delay(unsigned int loops) | ||
170 | { | ||
171 | if (loops != 0) | ||
172 | __asm__ __volatile__("mtctr %0; 1: bdnz 1b" : : | ||
173 | "r" (loops) : "ctr"); | ||
174 | } | ||
175 | |||
176 | /* Print an address in numeric and symbolic form (if possible) */ | ||
177 | static void xmon_print_symbol(unsigned long address, const char *mid, | ||
178 | const char *after) | ||
179 | { | ||
180 | char *modname; | ||
181 | const char *name = NULL; | ||
182 | unsigned long offset, size; | ||
183 | static char tmpstr[128]; | ||
184 | |||
185 | printf("%.8lx", address); | ||
186 | if (setjmp(bus_error_jmp) == 0) { | ||
187 | debugger_fault_handler = handle_fault; | ||
188 | sync(); | ||
189 | name = kallsyms_lookup(address, &size, &offset, &modname, | ||
190 | tmpstr); | ||
191 | sync(); | ||
192 | /* wait a little while to see if we get a machine check */ | ||
193 | __delay(200); | ||
194 | } | ||
195 | debugger_fault_handler = NULL; | ||
196 | |||
197 | if (name) { | ||
198 | printf("%s%s+%#lx/%#lx", mid, name, offset, size); | ||
199 | if (modname) | ||
200 | printf(" [%s]", modname); | ||
201 | } | ||
202 | printf("%s", after); | ||
203 | } | ||
204 | |||
205 | static void get_tb(unsigned *p) | ||
206 | { | ||
207 | unsigned hi, lo, hiagain; | ||
208 | |||
209 | if ((get_pvr() >> 16) == 1) | ||
210 | return; | ||
211 | |||
212 | do { | ||
213 | asm volatile("mftbu %0; mftb %1; mftbu %2" | ||
214 | : "=r" (hi), "=r" (lo), "=r" (hiagain)); | ||
215 | } while (hi != hiagain); | ||
216 | p[0] = hi; | ||
217 | p[1] = lo; | ||
218 | } | ||
219 | |||
220 | static inline void xmon_enable_sstep(struct pt_regs *regs) | ||
221 | { | ||
222 | regs->msr |= MSR_SSTEP_ENABLE; | ||
223 | #ifdef CONFIG_4xx | ||
224 | mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) | DBCR0_IC | DBCR0_IDM); | ||
225 | #endif | ||
226 | } | ||
227 | |||
228 | int xmon(struct pt_regs *excp) | ||
229 | { | ||
230 | struct pt_regs regs; | ||
231 | int msr, cmd; | ||
232 | |||
233 | get_tb(stop_tb[smp_processor_id()]); | ||
234 | if (excp == NULL) { | ||
235 | asm volatile ("stw 0,0(%0)\n\ | ||
236 | lwz 0,0(1)\n\ | ||
237 | stw 0,4(%0)\n\ | ||
238 | stmw 2,8(%0)" : : "b" (®s)); | ||
239 | regs.nip = regs.link = ((unsigned long *)regs.gpr[1])[1]; | ||
240 | regs.msr = get_msr(); | ||
241 | regs.ctr = get_ctr(); | ||
242 | regs.xer = get_xer(); | ||
243 | regs.ccr = get_cr(); | ||
244 | regs.trap = 0; | ||
245 | excp = ®s; | ||
246 | } | ||
247 | |||
248 | msr = get_msr(); | ||
249 | set_msr(msr & ~0x8000); /* disable interrupts */ | ||
250 | xmon_regs[smp_processor_id()] = excp; | ||
251 | xmon_enter(); | ||
252 | excprint(excp); | ||
253 | #ifdef CONFIG_SMP | ||
254 | if (test_and_set_bit(smp_processor_id(), &cpus_in_xmon)) | ||
255 | for (;;) | ||
256 | ; | ||
257 | while (test_and_set_bit(0, &got_xmon)) { | ||
258 | if (take_xmon == smp_processor_id()) { | ||
259 | take_xmon = -1; | ||
260 | break; | ||
261 | } | ||
262 | } | ||
263 | /* | ||
264 | * XXX: breakpoints are removed while any cpu is in xmon | ||
265 | */ | ||
266 | #endif /* CONFIG_SMP */ | ||
267 | remove_bpts(); | ||
268 | cmd = cmds(excp); | ||
269 | if (cmd == 's') { | ||
270 | xmon_trace[smp_processor_id()] = SSTEP; | ||
271 | xmon_enable_sstep(excp); | ||
272 | } else if (at_breakpoint(excp->nip)) { | ||
273 | xmon_trace[smp_processor_id()] = BRSTEP; | ||
274 | xmon_enable_sstep(excp); | ||
275 | } else { | ||
276 | xmon_trace[smp_processor_id()] = 0; | ||
277 | insert_bpts(); | ||
278 | } | ||
279 | xmon_leave(); | ||
280 | xmon_regs[smp_processor_id()] = NULL; | ||
281 | #ifdef CONFIG_SMP | ||
282 | clear_bit(0, &got_xmon); | ||
283 | clear_bit(smp_processor_id(), &cpus_in_xmon); | ||
284 | #endif /* CONFIG_SMP */ | ||
285 | set_msr(msr); /* restore interrupt enable */ | ||
286 | get_tb(start_tb[smp_processor_id()]); | ||
287 | |||
288 | return cmd != 'X'; | ||
289 | } | ||
290 | |||
291 | irqreturn_t | ||
292 | xmon_irq(int irq, void *d, struct pt_regs *regs) | ||
293 | { | ||
294 | unsigned long flags; | ||
295 | local_irq_save(flags); | ||
296 | printf("Keyboard interrupt\n"); | ||
297 | xmon(regs); | ||
298 | local_irq_restore(flags); | ||
299 | return IRQ_HANDLED; | ||
300 | } | ||
301 | |||
302 | int | ||
303 | xmon_bpt(struct pt_regs *regs) | ||
304 | { | ||
305 | struct bpt *bp; | ||
306 | |||
307 | bp = at_breakpoint(regs->nip); | ||
308 | if (!bp) | ||
309 | return 0; | ||
310 | if (bp->count) { | ||
311 | --bp->count; | ||
312 | remove_bpts(); | ||
313 | excprint(regs); | ||
314 | xmon_trace[smp_processor_id()] = BRSTEP; | ||
315 | xmon_enable_sstep(regs); | ||
316 | } else { | ||
317 | xmon(regs); | ||
318 | } | ||
319 | return 1; | ||
320 | } | ||
321 | |||
322 | int | ||
323 | xmon_sstep(struct pt_regs *regs) | ||
324 | { | ||
325 | if (!xmon_trace[smp_processor_id()]) | ||
326 | return 0; | ||
327 | if (xmon_trace[smp_processor_id()] == BRSTEP) { | ||
328 | xmon_trace[smp_processor_id()] = 0; | ||
329 | insert_bpts(); | ||
330 | } else { | ||
331 | xmon(regs); | ||
332 | } | ||
333 | return 1; | ||
334 | } | ||
335 | |||
336 | int | ||
337 | xmon_dabr_match(struct pt_regs *regs) | ||
338 | { | ||
339 | if (dabr.enabled && dabr.count) { | ||
340 | --dabr.count; | ||
341 | remove_bpts(); | ||
342 | excprint(regs); | ||
343 | xmon_trace[smp_processor_id()] = BRSTEP; | ||
344 | regs->msr |= 0x400; | ||
345 | } else { | ||
346 | dabr.instr = regs->nip; | ||
347 | xmon(regs); | ||
348 | } | ||
349 | return 1; | ||
350 | } | ||
351 | |||
352 | int | ||
353 | xmon_iabr_match(struct pt_regs *regs) | ||
354 | { | ||
355 | if (iabr.enabled && iabr.count) { | ||
356 | --iabr.count; | ||
357 | remove_bpts(); | ||
358 | excprint(regs); | ||
359 | xmon_trace[smp_processor_id()] = BRSTEP; | ||
360 | regs->msr |= 0x400; | ||
361 | } else { | ||
362 | xmon(regs); | ||
363 | } | ||
364 | return 1; | ||
365 | } | ||
366 | |||
367 | static struct bpt * | ||
368 | at_breakpoint(unsigned pc) | ||
369 | { | ||
370 | int i; | ||
371 | struct bpt *bp; | ||
372 | |||
373 | if (dabr.enabled && pc == dabr.instr) | ||
374 | return &dabr; | ||
375 | if (iabr.enabled && pc == iabr.address) | ||
376 | return &iabr; | ||
377 | bp = bpts; | ||
378 | for (i = 0; i < NBPTS; ++i, ++bp) | ||
379 | if (bp->enabled && pc == bp->address) | ||
380 | return bp; | ||
381 | return NULL; | ||
382 | } | ||
383 | |||
384 | static void | ||
385 | insert_bpts(void) | ||
386 | { | ||
387 | int i; | ||
388 | struct bpt *bp; | ||
389 | |||
390 | bp = bpts; | ||
391 | for (i = 0; i < NBPTS; ++i, ++bp) { | ||
392 | if (!bp->enabled) | ||
393 | continue; | ||
394 | if (mread(bp->address, &bp->instr, 4) != 4 | ||
395 | || mwrite(bp->address, &bpinstr, 4) != 4) { | ||
396 | printf("Couldn't insert breakpoint at %x, disabling\n", | ||
397 | bp->address); | ||
398 | bp->enabled = 0; | ||
399 | } | ||
400 | store_inst((void *) bp->address); | ||
401 | } | ||
402 | #if ! (defined(CONFIG_8xx) || defined(CONFIG_4xx)) | ||
403 | if (dabr.enabled) | ||
404 | set_dabr(dabr.address); | ||
405 | if (iabr.enabled) | ||
406 | set_iabr(iabr.address); | ||
407 | #endif | ||
408 | } | ||
409 | |||
410 | static void | ||
411 | remove_bpts(void) | ||
412 | { | ||
413 | int i; | ||
414 | struct bpt *bp; | ||
415 | unsigned instr; | ||
416 | |||
417 | #if ! (defined(CONFIG_8xx) || defined(CONFIG_4xx)) | ||
418 | set_dabr(0); | ||
419 | set_iabr(0); | ||
420 | #endif | ||
421 | bp = bpts; | ||
422 | for (i = 0; i < NBPTS; ++i, ++bp) { | ||
423 | if (!bp->enabled) | ||
424 | continue; | ||
425 | if (mread(bp->address, &instr, 4) == 4 | ||
426 | && instr == bpinstr | ||
427 | && mwrite(bp->address, &bp->instr, 4) != 4) | ||
428 | printf("Couldn't remove breakpoint at %x\n", | ||
429 | bp->address); | ||
430 | store_inst((void *) bp->address); | ||
431 | } | ||
432 | } | ||
433 | |||
434 | static char *last_cmd; | ||
435 | |||
436 | /* Command interpreting routine */ | ||
437 | static int | ||
438 | cmds(struct pt_regs *excp) | ||
439 | { | ||
440 | int cmd; | ||
441 | |||
442 | last_cmd = NULL; | ||
443 | for(;;) { | ||
444 | #ifdef CONFIG_SMP | ||
445 | printf("%d:", smp_processor_id()); | ||
446 | #endif /* CONFIG_SMP */ | ||
447 | printf("mon> "); | ||
448 | fflush(stdout); | ||
449 | flush_input(); | ||
450 | termch = 0; | ||
451 | cmd = skipbl(); | ||
452 | if( cmd == '\n' ) { | ||
453 | if (last_cmd == NULL) | ||
454 | continue; | ||
455 | take_input(last_cmd); | ||
456 | last_cmd = NULL; | ||
457 | cmd = inchar(); | ||
458 | } | ||
459 | switch (cmd) { | ||
460 | case 'm': | ||
461 | cmd = inchar(); | ||
462 | switch (cmd) { | ||
463 | case 'm': | ||
464 | case 's': | ||
465 | case 'd': | ||
466 | memops(cmd); | ||
467 | break; | ||
468 | case 'l': | ||
469 | memlocate(); | ||
470 | break; | ||
471 | case 'z': | ||
472 | memzcan(); | ||
473 | break; | ||
474 | default: | ||
475 | termch = cmd; | ||
476 | memex(); | ||
477 | } | ||
478 | break; | ||
479 | case 'd': | ||
480 | dump(); | ||
481 | break; | ||
482 | case 'l': | ||
483 | symbol_lookup(); | ||
484 | break; | ||
485 | case 'r': | ||
486 | if (excp != NULL) | ||
487 | prregs(excp); /* print regs */ | ||
488 | break; | ||
489 | case 'e': | ||
490 | if (excp == NULL) | ||
491 | printf("No exception information\n"); | ||
492 | else | ||
493 | excprint(excp); | ||
494 | break; | ||
495 | case 'S': | ||
496 | super_regs(); | ||
497 | break; | ||
498 | case 't': | ||
499 | backtrace(excp); | ||
500 | break; | ||
501 | case 'f': | ||
502 | cacheflush(); | ||
503 | break; | ||
504 | case 'h': | ||
505 | dump_hash_table(); | ||
506 | break; | ||
507 | case 's': | ||
508 | case 'x': | ||
509 | case EOF: | ||
510 | return cmd; | ||
511 | case '?': | ||
512 | printf(help_string); | ||
513 | break; | ||
514 | default: | ||
515 | printf("Unrecognized command: "); | ||
516 | if( ' ' < cmd && cmd <= '~' ) | ||
517 | putchar(cmd); | ||
518 | else | ||
519 | printf("\\x%x", cmd); | ||
520 | printf(" (type ? for help)\n"); | ||
521 | break; | ||
522 | case 'b': | ||
523 | bpt_cmds(); | ||
524 | break; | ||
525 | case 'C': | ||
526 | csum(); | ||
527 | break; | ||
528 | #ifdef CONFIG_SMP | ||
529 | case 'c': | ||
530 | cpu_cmd(); | ||
531 | break; | ||
532 | #endif /* CONFIG_SMP */ | ||
533 | case 'z': | ||
534 | bootcmds(); | ||
535 | break; | ||
536 | case 'p': | ||
537 | proccall(); | ||
538 | break; | ||
539 | case 'T': | ||
540 | printtime(); | ||
541 | break; | ||
542 | } | ||
543 | } | ||
544 | } | ||
545 | |||
546 | extern unsigned tb_to_us; | ||
547 | |||
548 | #define mulhwu(x,y) \ | ||
549 | ({unsigned z; asm ("mulhwu %0,%1,%2" : "=r" (z) : "r" (x), "r" (y)); z;}) | ||
550 | |||
551 | static void printtime(void) | ||
552 | { | ||
553 | unsigned int delta; | ||
554 | |||
555 | delta = stop_tb[smp_processor_id()][1] | ||
556 | - start_tb[smp_processor_id()][1]; | ||
557 | delta = mulhwu(tb_to_us, delta); | ||
558 | printf("%u.%06u seconds\n", delta / 1000000, delta % 1000000); | ||
559 | } | ||
560 | |||
561 | static void bootcmds(void) | ||
562 | { | ||
563 | int cmd; | ||
564 | |||
565 | cmd = inchar(); | ||
566 | if (cmd == 'r') | ||
567 | ppc_md.restart(NULL); | ||
568 | else if (cmd == 'h') | ||
569 | ppc_md.halt(); | ||
570 | else if (cmd == 'p') | ||
571 | ppc_md.power_off(); | ||
572 | } | ||
573 | |||
574 | #ifdef CONFIG_SMP | ||
575 | static void cpu_cmd(void) | ||
576 | { | ||
577 | unsigned cpu; | ||
578 | int timeout; | ||
579 | int cmd; | ||
580 | |||
581 | cmd = inchar(); | ||
582 | if (cmd == 'i') { | ||
583 | /* interrupt other cpu(s) */ | ||
584 | cpu = MSG_ALL_BUT_SELF; | ||
585 | if (scanhex(&cpu)) | ||
586 | smp_send_xmon_break(cpu); | ||
587 | return; | ||
588 | } | ||
589 | termch = cmd; | ||
590 | if (!scanhex(&cpu)) { | ||
591 | /* print cpus waiting or in xmon */ | ||
592 | printf("cpus stopped:"); | ||
593 | for (cpu = 0; cpu < NR_CPUS; ++cpu) { | ||
594 | if (test_bit(cpu, &cpus_in_xmon)) { | ||
595 | printf(" %d", cpu); | ||
596 | if (cpu == smp_processor_id()) | ||
597 | printf("*", cpu); | ||
598 | } | ||
599 | } | ||
600 | printf("\n"); | ||
601 | return; | ||
602 | } | ||
603 | /* try to switch to cpu specified */ | ||
604 | take_xmon = cpu; | ||
605 | timeout = 10000000; | ||
606 | while (take_xmon >= 0) { | ||
607 | if (--timeout == 0) { | ||
608 | /* yes there's a race here */ | ||
609 | take_xmon = -1; | ||
610 | printf("cpu %u didn't take control\n", cpu); | ||
611 | return; | ||
612 | } | ||
613 | } | ||
614 | /* now have to wait to be given control back */ | ||
615 | while (test_and_set_bit(0, &got_xmon)) { | ||
616 | if (take_xmon == smp_processor_id()) { | ||
617 | take_xmon = -1; | ||
618 | break; | ||
619 | } | ||
620 | } | ||
621 | } | ||
622 | #endif /* CONFIG_SMP */ | ||
623 | |||
624 | |||
625 | static unsigned short fcstab[256] = { | ||
626 | 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, | ||
627 | 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, | ||
628 | 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, | ||
629 | 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, | ||
630 | 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, | ||
631 | 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, | ||
632 | 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, | ||
633 | 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, | ||
634 | 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, | ||
635 | 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, | ||
636 | 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, | ||
637 | 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, | ||
638 | 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, | ||
639 | 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, | ||
640 | 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, | ||
641 | 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, | ||
642 | 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, | ||
643 | 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, | ||
644 | 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, | ||
645 | 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, | ||
646 | 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, | ||
647 | 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, | ||
648 | 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, | ||
649 | 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, | ||
650 | 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, | ||
651 | 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, | ||
652 | 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, | ||
653 | 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, | ||
654 | 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, | ||
655 | 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, | ||
656 | 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, | ||
657 | 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 | ||
658 | }; | ||
659 | |||
660 | #define FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff]) | ||
661 | |||
662 | static void | ||
663 | csum(void) | ||
664 | { | ||
665 | unsigned int i; | ||
666 | unsigned short fcs; | ||
667 | unsigned char v; | ||
668 | |||
669 | if (!scanhex(&adrs)) | ||
670 | return; | ||
671 | if (!scanhex(&ncsum)) | ||
672 | return; | ||
673 | fcs = 0xffff; | ||
674 | for (i = 0; i < ncsum; ++i) { | ||
675 | if (mread(adrs+i, &v, 1) == 0) { | ||
676 | printf("csum stopped at %x\n", adrs+i); | ||
677 | break; | ||
678 | } | ||
679 | fcs = FCS(fcs, v); | ||
680 | } | ||
681 | printf("%x\n", fcs); | ||
682 | } | ||
683 | |||
684 | static void | ||
685 | bpt_cmds(void) | ||
686 | { | ||
687 | int cmd; | ||
688 | unsigned a; | ||
689 | int mode, i; | ||
690 | struct bpt *bp; | ||
691 | |||
692 | cmd = inchar(); | ||
693 | switch (cmd) { | ||
694 | #if ! (defined(CONFIG_8xx) || defined(CONFIG_4xx)) | ||
695 | case 'd': | ||
696 | mode = 7; | ||
697 | cmd = inchar(); | ||
698 | if (cmd == 'r') | ||
699 | mode = 5; | ||
700 | else if (cmd == 'w') | ||
701 | mode = 6; | ||
702 | else | ||
703 | termch = cmd; | ||
704 | cmd = inchar(); | ||
705 | if (cmd == 'p') | ||
706 | mode &= ~4; | ||
707 | else | ||
708 | termch = cmd; | ||
709 | dabr.address = 0; | ||
710 | dabr.count = 0; | ||
711 | dabr.enabled = scanhex(&dabr.address); | ||
712 | scanhex(&dabr.count); | ||
713 | if (dabr.enabled) | ||
714 | dabr.address = (dabr.address & ~7) | mode; | ||
715 | break; | ||
716 | case 'i': | ||
717 | cmd = inchar(); | ||
718 | if (cmd == 'p') | ||
719 | mode = 2; | ||
720 | else | ||
721 | mode = 3; | ||
722 | iabr.address = 0; | ||
723 | iabr.count = 0; | ||
724 | iabr.enabled = scanhex(&iabr.address); | ||
725 | if (iabr.enabled) | ||
726 | iabr.address |= mode; | ||
727 | scanhex(&iabr.count); | ||
728 | break; | ||
729 | #endif | ||
730 | case 'c': | ||
731 | if (!scanhex(&a)) { | ||
732 | /* clear all breakpoints */ | ||
733 | for (i = 0; i < NBPTS; ++i) | ||
734 | bpts[i].enabled = 0; | ||
735 | iabr.enabled = 0; | ||
736 | dabr.enabled = 0; | ||
737 | printf("All breakpoints cleared\n"); | ||
738 | } else { | ||
739 | bp = at_breakpoint(a); | ||
740 | if (bp == 0) { | ||
741 | printf("No breakpoint at %x\n", a); | ||
742 | } else { | ||
743 | bp->enabled = 0; | ||
744 | } | ||
745 | } | ||
746 | break; | ||
747 | default: | ||
748 | termch = cmd; | ||
749 | if (!scanhex(&a)) { | ||
750 | /* print all breakpoints */ | ||
751 | printf("type address count\n"); | ||
752 | if (dabr.enabled) { | ||
753 | printf("data %.8x %8x [", dabr.address & ~7, | ||
754 | dabr.count); | ||
755 | if (dabr.address & 1) | ||
756 | printf("r"); | ||
757 | if (dabr.address & 2) | ||
758 | printf("w"); | ||
759 | if (!(dabr.address & 4)) | ||
760 | printf("p"); | ||
761 | printf("]\n"); | ||
762 | } | ||
763 | if (iabr.enabled) | ||
764 | printf("inst %.8x %8x\n", iabr.address & ~3, | ||
765 | iabr.count); | ||
766 | for (bp = bpts; bp < &bpts[NBPTS]; ++bp) | ||
767 | if (bp->enabled) | ||
768 | printf("trap %.8x %8x\n", bp->address, | ||
769 | bp->count); | ||
770 | break; | ||
771 | } | ||
772 | bp = at_breakpoint(a); | ||
773 | if (bp == 0) { | ||
774 | for (bp = bpts; bp < &bpts[NBPTS]; ++bp) | ||
775 | if (!bp->enabled) | ||
776 | break; | ||
777 | if (bp >= &bpts[NBPTS]) { | ||
778 | printf("Sorry, no free breakpoints\n"); | ||
779 | break; | ||
780 | } | ||
781 | } | ||
782 | bp->enabled = 1; | ||
783 | bp->address = a; | ||
784 | bp->count = 0; | ||
785 | scanhex(&bp->count); | ||
786 | break; | ||
787 | } | ||
788 | } | ||
789 | |||
790 | static void | ||
791 | backtrace(struct pt_regs *excp) | ||
792 | { | ||
793 | unsigned sp; | ||
794 | unsigned stack[2]; | ||
795 | struct pt_regs regs; | ||
796 | extern char ret_from_except, ret_from_except_full, ret_from_syscall; | ||
797 | |||
798 | printf("backtrace:\n"); | ||
799 | |||
800 | if (excp != NULL) | ||
801 | sp = excp->gpr[1]; | ||
802 | else | ||
803 | sp = getsp(); | ||
804 | scanhex(&sp); | ||
805 | scannl(); | ||
806 | for (; sp != 0; sp = stack[0]) { | ||
807 | if (mread(sp, stack, sizeof(stack)) != sizeof(stack)) | ||
808 | break; | ||
809 | printf("[%.8lx] ", stack[0]); | ||
810 | xmon_print_symbol(stack[1], " ", "\n"); | ||
811 | if (stack[1] == (unsigned) &ret_from_except | ||
812 | || stack[1] == (unsigned) &ret_from_except_full | ||
813 | || stack[1] == (unsigned) &ret_from_syscall) { | ||
814 | if (mread(sp+16, ®s, sizeof(regs)) != sizeof(regs)) | ||
815 | break; | ||
816 | printf("exception:%x [%x] %x\n", regs.trap, sp+16, | ||
817 | regs.nip); | ||
818 | sp = regs.gpr[1]; | ||
819 | if (mread(sp, stack, sizeof(stack)) != sizeof(stack)) | ||
820 | break; | ||
821 | } | ||
822 | } | ||
823 | } | ||
824 | |||
825 | int | ||
826 | getsp(void) | ||
827 | { | ||
828 | int x; | ||
829 | |||
830 | asm("mr %0,1" : "=r" (x) :); | ||
831 | return x; | ||
832 | } | ||
833 | |||
834 | void | ||
835 | excprint(struct pt_regs *fp) | ||
836 | { | ||
837 | int trap; | ||
838 | |||
839 | #ifdef CONFIG_SMP | ||
840 | printf("cpu %d: ", smp_processor_id()); | ||
841 | #endif /* CONFIG_SMP */ | ||
842 | printf("vector: %x at pc=", fp->trap); | ||
843 | xmon_print_symbol(fp->nip, ": ", ", lr="); | ||
844 | xmon_print_symbol(fp->link, ": ", "\n"); | ||
845 | printf("msr = %x, sp = %x [%x]\n", fp->msr, fp->gpr[1], fp); | ||
846 | trap = TRAP(fp); | ||
847 | if (trap == 0x300 || trap == 0x600) | ||
848 | printf("dar = %x, dsisr = %x\n", fp->dar, fp->dsisr); | ||
849 | if (current) | ||
850 | printf("current = %x, pid = %d, comm = %s\n", | ||
851 | current, current->pid, current->comm); | ||
852 | } | ||
853 | |||
854 | void | ||
855 | prregs(struct pt_regs *fp) | ||
856 | { | ||
857 | int n; | ||
858 | unsigned base; | ||
859 | |||
860 | if (scanhex(&base)) | ||
861 | fp = (struct pt_regs *) base; | ||
862 | for (n = 0; n < 32; ++n) { | ||
863 | printf("R%.2d = %.8x%s", n, fp->gpr[n], | ||
864 | (n & 3) == 3? "\n": " "); | ||
865 | if (n == 12 && !FULL_REGS(fp)) { | ||
866 | printf("\n"); | ||
867 | break; | ||
868 | } | ||
869 | } | ||
870 | printf("pc = %.8x msr = %.8x lr = %.8x cr = %.8x\n", | ||
871 | fp->nip, fp->msr, fp->link, fp->ccr); | ||
872 | printf("ctr = %.8x xer = %.8x trap = %4x\n", | ||
873 | fp->ctr, fp->xer, fp->trap); | ||
874 | } | ||
875 | |||
876 | void | ||
877 | cacheflush(void) | ||
878 | { | ||
879 | int cmd; | ||
880 | unsigned nflush; | ||
881 | |||
882 | cmd = inchar(); | ||
883 | if (cmd != 'i') | ||
884 | termch = cmd; | ||
885 | scanhex(&adrs); | ||
886 | if (termch != '\n') | ||
887 | termch = 0; | ||
888 | nflush = 1; | ||
889 | scanhex(&nflush); | ||
890 | nflush = (nflush + 31) / 32; | ||
891 | if (cmd != 'i') { | ||
892 | for (; nflush > 0; --nflush, adrs += 0x20) | ||
893 | cflush((void *) adrs); | ||
894 | } else { | ||
895 | for (; nflush > 0; --nflush, adrs += 0x20) | ||
896 | cinval((void *) adrs); | ||
897 | } | ||
898 | } | ||
899 | |||
900 | unsigned int | ||
901 | read_spr(int n) | ||
902 | { | ||
903 | unsigned int instrs[2]; | ||
904 | int (*code)(void); | ||
905 | |||
906 | instrs[0] = 0x7c6002a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6); | ||
907 | instrs[1] = 0x4e800020; | ||
908 | store_inst(instrs); | ||
909 | store_inst(instrs+1); | ||
910 | code = (int (*)(void)) instrs; | ||
911 | return code(); | ||
912 | } | ||
913 | |||
914 | void | ||
915 | write_spr(int n, unsigned int val) | ||
916 | { | ||
917 | unsigned int instrs[2]; | ||
918 | int (*code)(unsigned int); | ||
919 | |||
920 | instrs[0] = 0x7c6003a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6); | ||
921 | instrs[1] = 0x4e800020; | ||
922 | store_inst(instrs); | ||
923 | store_inst(instrs+1); | ||
924 | code = (int (*)(unsigned int)) instrs; | ||
925 | code(val); | ||
926 | } | ||
927 | |||
928 | static unsigned int regno; | ||
929 | extern char exc_prolog; | ||
930 | extern char dec_exc; | ||
931 | |||
932 | void | ||
933 | super_regs(void) | ||
934 | { | ||
935 | int i, cmd; | ||
936 | unsigned val; | ||
937 | |||
938 | cmd = skipbl(); | ||
939 | if (cmd == '\n') { | ||
940 | printf("msr = %x, pvr = %x\n", get_msr(), get_pvr()); | ||
941 | printf("sprg0-3 = %x %x %x %x\n", get_sprg0(), get_sprg1(), | ||
942 | get_sprg2(), get_sprg3()); | ||
943 | printf("srr0 = %x, srr1 = %x\n", get_srr0(), get_srr1()); | ||
944 | #ifdef CONFIG_PPC_STD_MMU | ||
945 | printf("sr0-15 ="); | ||
946 | for (i = 0; i < 16; ++i) | ||
947 | printf(" %x", get_sr(i)); | ||
948 | printf("\n"); | ||
949 | #endif | ||
950 | asm("mr %0,1" : "=r" (i) :); | ||
951 | printf("sp = %x ", i); | ||
952 | asm("mr %0,2" : "=r" (i) :); | ||
953 | printf("toc = %x\n", i); | ||
954 | return; | ||
955 | } | ||
956 | |||
957 | scanhex(®no); | ||
958 | switch (cmd) { | ||
959 | case 'w': | ||
960 | val = read_spr(regno); | ||
961 | scanhex(&val); | ||
962 | write_spr(regno, val); | ||
963 | /* fall through */ | ||
964 | case 'r': | ||
965 | printf("spr %x = %x\n", regno, read_spr(regno)); | ||
966 | break; | ||
967 | case 's': | ||
968 | val = get_sr(regno); | ||
969 | scanhex(&val); | ||
970 | set_sr(regno, val); | ||
971 | break; | ||
972 | case 'm': | ||
973 | val = get_msr(); | ||
974 | scanhex(&val); | ||
975 | set_msr(val); | ||
976 | break; | ||
977 | } | ||
978 | scannl(); | ||
979 | } | ||
980 | |||
981 | #ifndef CONFIG_PPC_STD_MMU | ||
982 | static void | ||
983 | dump_hash_table(void) | ||
984 | { | ||
985 | printf("This CPU doesn't have a hash table.\n"); | ||
986 | } | ||
987 | #else | ||
988 | |||
989 | static void | ||
990 | dump_hash_table_seg(unsigned seg, unsigned start, unsigned end) | ||
991 | { | ||
992 | extern void *Hash; | ||
993 | extern unsigned long Hash_size; | ||
994 | unsigned *htab = Hash; | ||
995 | unsigned hsize = Hash_size; | ||
996 | unsigned v, hmask, va, last_va = 0; | ||
997 | int found, last_found, i; | ||
998 | unsigned *hg, w1, last_w2 = 0, last_va0 = 0; | ||
999 | |||
1000 | last_found = 0; | ||
1001 | hmask = hsize / 64 - 1; | ||
1002 | va = start; | ||
1003 | start = (start >> 12) & 0xffff; | ||
1004 | end = (end >> 12) & 0xffff; | ||
1005 | for (v = start; v < end; ++v) { | ||
1006 | found = 0; | ||
1007 | hg = htab + (((v ^ seg) & hmask) * 16); | ||
1008 | w1 = 0x80000000 | (seg << 7) | (v >> 10); | ||
1009 | for (i = 0; i < 8; ++i, hg += 2) { | ||
1010 | if (*hg == w1) { | ||
1011 | found = 1; | ||
1012 | break; | ||
1013 | } | ||
1014 | } | ||
1015 | if (!found) { | ||
1016 | w1 ^= 0x40; | ||
1017 | hg = htab + ((~(v ^ seg) & hmask) * 16); | ||
1018 | for (i = 0; i < 8; ++i, hg += 2) { | ||
1019 | if (*hg == w1) { | ||
1020 | found = 1; | ||
1021 | break; | ||
1022 | } | ||
1023 | } | ||
1024 | } | ||
1025 | if (!(last_found && found && (hg[1] & ~0x180) == last_w2 + 4096)) { | ||
1026 | if (last_found) { | ||
1027 | if (last_va != last_va0) | ||
1028 | printf(" ... %x", last_va); | ||
1029 | printf("\n"); | ||
1030 | } | ||
1031 | if (found) { | ||
1032 | printf("%x to %x", va, hg[1]); | ||
1033 | last_va0 = va; | ||
1034 | } | ||
1035 | last_found = found; | ||
1036 | } | ||
1037 | if (found) { | ||
1038 | last_w2 = hg[1] & ~0x180; | ||
1039 | last_va = va; | ||
1040 | } | ||
1041 | va += 4096; | ||
1042 | } | ||
1043 | if (last_found) | ||
1044 | printf(" ... %x\n", last_va); | ||
1045 | } | ||
1046 | |||
1047 | static unsigned hash_ctx; | ||
1048 | static unsigned hash_start; | ||
1049 | static unsigned hash_end; | ||
1050 | |||
1051 | static void | ||
1052 | dump_hash_table(void) | ||
1053 | { | ||
1054 | int seg; | ||
1055 | unsigned seg_start, seg_end; | ||
1056 | |||
1057 | hash_ctx = 0; | ||
1058 | hash_start = 0; | ||
1059 | hash_end = 0xfffff000; | ||
1060 | scanhex(&hash_ctx); | ||
1061 | scanhex(&hash_start); | ||
1062 | scanhex(&hash_end); | ||
1063 | printf("Mappings for context %x\n", hash_ctx); | ||
1064 | seg_start = hash_start; | ||
1065 | for (seg = hash_start >> 28; seg <= hash_end >> 28; ++seg) { | ||
1066 | seg_end = (seg << 28) | 0x0ffff000; | ||
1067 | if (seg_end > hash_end) | ||
1068 | seg_end = hash_end; | ||
1069 | dump_hash_table_seg((hash_ctx << 4) + (seg * 0x111), | ||
1070 | seg_start, seg_end); | ||
1071 | seg_start = seg_end + 0x1000; | ||
1072 | } | ||
1073 | } | ||
1074 | #endif /* CONFIG_PPC_STD_MMU */ | ||
1075 | |||
1076 | /* | ||
1077 | * Stuff for reading and writing memory safely | ||
1078 | */ | ||
1079 | |||
1080 | int | ||
1081 | mread(unsigned adrs, void *buf, int size) | ||
1082 | { | ||
1083 | volatile int n; | ||
1084 | char *p, *q; | ||
1085 | |||
1086 | n = 0; | ||
1087 | if( setjmp(bus_error_jmp) == 0 ){ | ||
1088 | debugger_fault_handler = handle_fault; | ||
1089 | sync(); | ||
1090 | p = (char *) adrs; | ||
1091 | q = (char *) buf; | ||
1092 | switch (size) { | ||
1093 | case 2: *(short *)q = *(short *)p; break; | ||
1094 | case 4: *(int *)q = *(int *)p; break; | ||
1095 | default: | ||
1096 | for( ; n < size; ++n ) { | ||
1097 | *q++ = *p++; | ||
1098 | sync(); | ||
1099 | } | ||
1100 | } | ||
1101 | sync(); | ||
1102 | /* wait a little while to see if we get a machine check */ | ||
1103 | __delay(200); | ||
1104 | n = size; | ||
1105 | } | ||
1106 | debugger_fault_handler = NULL; | ||
1107 | return n; | ||
1108 | } | ||
1109 | |||
1110 | int | ||
1111 | mwrite(unsigned adrs, void *buf, int size) | ||
1112 | { | ||
1113 | volatile int n; | ||
1114 | char *p, *q; | ||
1115 | |||
1116 | n = 0; | ||
1117 | if( setjmp(bus_error_jmp) == 0 ){ | ||
1118 | debugger_fault_handler = handle_fault; | ||
1119 | sync(); | ||
1120 | p = (char *) adrs; | ||
1121 | q = (char *) buf; | ||
1122 | switch (size) { | ||
1123 | case 2: *(short *)p = *(short *)q; break; | ||
1124 | case 4: *(int *)p = *(int *)q; break; | ||
1125 | default: | ||
1126 | for( ; n < size; ++n ) { | ||
1127 | *p++ = *q++; | ||
1128 | sync(); | ||
1129 | } | ||
1130 | } | ||
1131 | sync(); | ||
1132 | n = size; | ||
1133 | } else { | ||
1134 | printf("*** Error writing address %x\n", adrs + n); | ||
1135 | } | ||
1136 | debugger_fault_handler = NULL; | ||
1137 | return n; | ||
1138 | } | ||
1139 | |||
1140 | static int fault_type; | ||
1141 | static int fault_except; | ||
1142 | static char *fault_chars[] = { "--", "**", "##" }; | ||
1143 | |||
1144 | static void | ||
1145 | handle_fault(struct pt_regs *regs) | ||
1146 | { | ||
1147 | fault_except = TRAP(regs); | ||
1148 | fault_type = TRAP(regs) == 0x200? 0: TRAP(regs) == 0x300? 1: 2; | ||
1149 | longjmp(bus_error_jmp, 1); | ||
1150 | } | ||
1151 | |||
1152 | #define SWAP(a, b, t) ((t) = (a), (a) = (b), (b) = (t)) | ||
1153 | |||
1154 | void | ||
1155 | byterev(unsigned char *val, int size) | ||
1156 | { | ||
1157 | int t; | ||
1158 | |||
1159 | switch (size) { | ||
1160 | case 2: | ||
1161 | SWAP(val[0], val[1], t); | ||
1162 | break; | ||
1163 | case 4: | ||
1164 | SWAP(val[0], val[3], t); | ||
1165 | SWAP(val[1], val[2], t); | ||
1166 | break; | ||
1167 | } | ||
1168 | } | ||
1169 | |||
1170 | static int brev; | ||
1171 | static int mnoread; | ||
1172 | |||
1173 | void | ||
1174 | memex(void) | ||
1175 | { | ||
1176 | int cmd, inc, i, nslash; | ||
1177 | unsigned n; | ||
1178 | unsigned char val[4]; | ||
1179 | |||
1180 | last_cmd = "m\n"; | ||
1181 | scanhex(&adrs); | ||
1182 | while ((cmd = skipbl()) != '\n') { | ||
1183 | switch( cmd ){ | ||
1184 | case 'b': size = 1; break; | ||
1185 | case 'w': size = 2; break; | ||
1186 | case 'l': size = 4; break; | ||
1187 | case 'r': brev = !brev; break; | ||
1188 | case 'n': mnoread = 1; break; | ||
1189 | case '.': mnoread = 0; break; | ||
1190 | } | ||
1191 | } | ||
1192 | if( size <= 0 ) | ||
1193 | size = 1; | ||
1194 | else if( size > 4 ) | ||
1195 | size = 4; | ||
1196 | for(;;){ | ||
1197 | if (!mnoread) | ||
1198 | n = mread(adrs, val, size); | ||
1199 | printf("%.8x%c", adrs, brev? 'r': ' '); | ||
1200 | if (!mnoread) { | ||
1201 | if (brev) | ||
1202 | byterev(val, size); | ||
1203 | putchar(' '); | ||
1204 | for (i = 0; i < n; ++i) | ||
1205 | printf("%.2x", val[i]); | ||
1206 | for (; i < size; ++i) | ||
1207 | printf("%s", fault_chars[fault_type]); | ||
1208 | } | ||
1209 | putchar(' '); | ||
1210 | inc = size; | ||
1211 | nslash = 0; | ||
1212 | for(;;){ | ||
1213 | if( scanhex(&n) ){ | ||
1214 | for (i = 0; i < size; ++i) | ||
1215 | val[i] = n >> (i * 8); | ||
1216 | if (!brev) | ||
1217 | byterev(val, size); | ||
1218 | mwrite(adrs, val, size); | ||
1219 | inc = size; | ||
1220 | } | ||
1221 | cmd = skipbl(); | ||
1222 | if (cmd == '\n') | ||
1223 | break; | ||
1224 | inc = 0; | ||
1225 | switch (cmd) { | ||
1226 | case '\'': | ||
1227 | for(;;){ | ||
1228 | n = inchar(); | ||
1229 | if( n == '\\' ) | ||
1230 | n = bsesc(); | ||
1231 | else if( n == '\'' ) | ||
1232 | break; | ||
1233 | for (i = 0; i < size; ++i) | ||
1234 | val[i] = n >> (i * 8); | ||
1235 | if (!brev) | ||
1236 | byterev(val, size); | ||
1237 | mwrite(adrs, val, size); | ||
1238 | adrs += size; | ||
1239 | } | ||
1240 | adrs -= size; | ||
1241 | inc = size; | ||
1242 | break; | ||
1243 | case ',': | ||
1244 | adrs += size; | ||
1245 | break; | ||
1246 | case '.': | ||
1247 | mnoread = 0; | ||
1248 | break; | ||
1249 | case ';': | ||
1250 | break; | ||
1251 | case 'x': | ||
1252 | case EOF: | ||
1253 | scannl(); | ||
1254 | return; | ||
1255 | case 'b': | ||
1256 | case 'v': | ||
1257 | size = 1; | ||
1258 | break; | ||
1259 | case 'w': | ||
1260 | size = 2; | ||
1261 | break; | ||
1262 | case 'l': | ||
1263 | size = 4; | ||
1264 | break; | ||
1265 | case '^': | ||
1266 | adrs -= size; | ||
1267 | break; | ||
1268 | break; | ||
1269 | case '/': | ||
1270 | if (nslash > 0) | ||
1271 | adrs -= 1 << nslash; | ||
1272 | else | ||
1273 | nslash = 0; | ||
1274 | nslash += 4; | ||
1275 | adrs += 1 << nslash; | ||
1276 | break; | ||
1277 | case '\\': | ||
1278 | if (nslash < 0) | ||
1279 | adrs += 1 << -nslash; | ||
1280 | else | ||
1281 | nslash = 0; | ||
1282 | nslash -= 4; | ||
1283 | adrs -= 1 << -nslash; | ||
1284 | break; | ||
1285 | case 'm': | ||
1286 | scanhex(&adrs); | ||
1287 | break; | ||
1288 | case 'n': | ||
1289 | mnoread = 1; | ||
1290 | break; | ||
1291 | case 'r': | ||
1292 | brev = !brev; | ||
1293 | break; | ||
1294 | case '<': | ||
1295 | n = size; | ||
1296 | scanhex(&n); | ||
1297 | adrs -= n; | ||
1298 | break; | ||
1299 | case '>': | ||
1300 | n = size; | ||
1301 | scanhex(&n); | ||
1302 | adrs += n; | ||
1303 | break; | ||
1304 | } | ||
1305 | } | ||
1306 | adrs += inc; | ||
1307 | } | ||
1308 | } | ||
1309 | |||
1310 | int | ||
1311 | bsesc(void) | ||
1312 | { | ||
1313 | int c; | ||
1314 | |||
1315 | c = inchar(); | ||
1316 | switch( c ){ | ||
1317 | case 'n': c = '\n'; break; | ||
1318 | case 'r': c = '\r'; break; | ||
1319 | case 'b': c = '\b'; break; | ||
1320 | case 't': c = '\t'; break; | ||
1321 | } | ||
1322 | return c; | ||
1323 | } | ||
1324 | |||
1325 | void | ||
1326 | dump(void) | ||
1327 | { | ||
1328 | int c; | ||
1329 | |||
1330 | c = inchar(); | ||
1331 | if ((isxdigit(c) && c != 'f' && c != 'd') || c == '\n') | ||
1332 | termch = c; | ||
1333 | scanhex(&adrs); | ||
1334 | if( termch != '\n') | ||
1335 | termch = 0; | ||
1336 | if( c == 'i' ){ | ||
1337 | scanhex(&nidump); | ||
1338 | if( nidump == 0 ) | ||
1339 | nidump = 16; | ||
1340 | adrs += ppc_inst_dump(adrs, nidump); | ||
1341 | last_cmd = "di\n"; | ||
1342 | } else { | ||
1343 | scanhex(&ndump); | ||
1344 | if( ndump == 0 ) | ||
1345 | ndump = 64; | ||
1346 | prdump(adrs, ndump); | ||
1347 | adrs += ndump; | ||
1348 | last_cmd = "d\n"; | ||
1349 | } | ||
1350 | } | ||
1351 | |||
1352 | void | ||
1353 | prdump(unsigned adrs, int ndump) | ||
1354 | { | ||
1355 | register int n, m, c, r, nr; | ||
1356 | unsigned char temp[16]; | ||
1357 | |||
1358 | for( n = ndump; n > 0; ){ | ||
1359 | printf("%.8x", adrs); | ||
1360 | putchar(' '); | ||
1361 | r = n < 16? n: 16; | ||
1362 | nr = mread(adrs, temp, r); | ||
1363 | adrs += nr; | ||
1364 | for( m = 0; m < r; ++m ){ | ||
1365 | putchar((m & 3) == 0 && m > 0? '.': ' '); | ||
1366 | if( m < nr ) | ||
1367 | printf("%.2x", temp[m]); | ||
1368 | else | ||
1369 | printf("%s", fault_chars[fault_type]); | ||
1370 | } | ||
1371 | for(; m < 16; ++m ) | ||
1372 | printf(" "); | ||
1373 | printf(" |"); | ||
1374 | for( m = 0; m < r; ++m ){ | ||
1375 | if( m < nr ){ | ||
1376 | c = temp[m]; | ||
1377 | putchar(' ' <= c && c <= '~'? c: '.'); | ||
1378 | } else | ||
1379 | putchar(' '); | ||
1380 | } | ||
1381 | n -= r; | ||
1382 | for(; m < 16; ++m ) | ||
1383 | putchar(' '); | ||
1384 | printf("|\n"); | ||
1385 | if( nr < r ) | ||
1386 | break; | ||
1387 | } | ||
1388 | } | ||
1389 | |||
1390 | int | ||
1391 | ppc_inst_dump(unsigned adr, int count) | ||
1392 | { | ||
1393 | int nr, dotted; | ||
1394 | unsigned first_adr; | ||
1395 | unsigned long inst, last_inst = 0; | ||
1396 | unsigned char val[4]; | ||
1397 | |||
1398 | dotted = 0; | ||
1399 | for (first_adr = adr; count > 0; --count, adr += 4){ | ||
1400 | nr = mread(adr, val, 4); | ||
1401 | if( nr == 0 ){ | ||
1402 | const char *x = fault_chars[fault_type]; | ||
1403 | printf("%.8x %s%s%s%s\n", adr, x, x, x, x); | ||
1404 | break; | ||
1405 | } | ||
1406 | inst = GETWORD(val); | ||
1407 | if (adr > first_adr && inst == last_inst) { | ||
1408 | if (!dotted) { | ||
1409 | printf(" ...\n"); | ||
1410 | dotted = 1; | ||
1411 | } | ||
1412 | continue; | ||
1413 | } | ||
1414 | dotted = 0; | ||
1415 | last_inst = inst; | ||
1416 | printf("%.8x ", adr); | ||
1417 | printf("%.8x\t", inst); | ||
1418 | print_insn_big_powerpc(stdout, inst, adr); /* always returns 4 */ | ||
1419 | printf("\n"); | ||
1420 | } | ||
1421 | return adr - first_adr; | ||
1422 | } | ||
1423 | |||
1424 | void | ||
1425 | print_address(unsigned addr) | ||
1426 | { | ||
1427 | printf("0x%x", addr); | ||
1428 | } | ||
1429 | |||
1430 | /* | ||
1431 | * Memory operations - move, set, print differences | ||
1432 | */ | ||
1433 | static unsigned mdest; /* destination address */ | ||
1434 | static unsigned msrc; /* source address */ | ||
1435 | static unsigned mval; /* byte value to set memory to */ | ||
1436 | static unsigned mcount; /* # bytes to affect */ | ||
1437 | static unsigned mdiffs; /* max # differences to print */ | ||
1438 | |||
1439 | void | ||
1440 | memops(int cmd) | ||
1441 | { | ||
1442 | scanhex(&mdest); | ||
1443 | if( termch != '\n' ) | ||
1444 | termch = 0; | ||
1445 | scanhex(cmd == 's'? &mval: &msrc); | ||
1446 | if( termch != '\n' ) | ||
1447 | termch = 0; | ||
1448 | scanhex(&mcount); | ||
1449 | switch( cmd ){ | ||
1450 | case 'm': | ||
1451 | memmove((void *)mdest, (void *)msrc, mcount); | ||
1452 | break; | ||
1453 | case 's': | ||
1454 | memset((void *)mdest, mval, mcount); | ||
1455 | break; | ||
1456 | case 'd': | ||
1457 | if( termch != '\n' ) | ||
1458 | termch = 0; | ||
1459 | scanhex(&mdiffs); | ||
1460 | memdiffs((unsigned char *)mdest, (unsigned char *)msrc, mcount, mdiffs); | ||
1461 | break; | ||
1462 | } | ||
1463 | } | ||
1464 | |||
1465 | void | ||
1466 | memdiffs(unsigned char *p1, unsigned char *p2, unsigned nb, unsigned maxpr) | ||
1467 | { | ||
1468 | unsigned n, prt; | ||
1469 | |||
1470 | prt = 0; | ||
1471 | for( n = nb; n > 0; --n ) | ||
1472 | if( *p1++ != *p2++ ) | ||
1473 | if( ++prt <= maxpr ) | ||
1474 | printf("%.8x %.2x # %.8x %.2x\n", (unsigned)p1 - 1, | ||
1475 | p1[-1], (unsigned)p2 - 1, p2[-1]); | ||
1476 | if( prt > maxpr ) | ||
1477 | printf("Total of %d differences\n", prt); | ||
1478 | } | ||
1479 | |||
1480 | static unsigned mend; | ||
1481 | static unsigned mask; | ||
1482 | |||
1483 | void | ||
1484 | memlocate(void) | ||
1485 | { | ||
1486 | unsigned a, n; | ||
1487 | unsigned char val[4]; | ||
1488 | |||
1489 | last_cmd = "ml"; | ||
1490 | scanhex(&mdest); | ||
1491 | if (termch != '\n') { | ||
1492 | termch = 0; | ||
1493 | scanhex(&mend); | ||
1494 | if (termch != '\n') { | ||
1495 | termch = 0; | ||
1496 | scanhex(&mval); | ||
1497 | mask = ~0; | ||
1498 | if (termch != '\n') termch = 0; | ||
1499 | scanhex(&mask); | ||
1500 | } | ||
1501 | } | ||
1502 | n = 0; | ||
1503 | for (a = mdest; a < mend; a += 4) { | ||
1504 | if (mread(a, val, 4) == 4 | ||
1505 | && ((GETWORD(val) ^ mval) & mask) == 0) { | ||
1506 | printf("%.8x: %.8x\n", a, GETWORD(val)); | ||
1507 | if (++n >= 10) | ||
1508 | break; | ||
1509 | } | ||
1510 | } | ||
1511 | } | ||
1512 | |||
1513 | static unsigned mskip = 0x1000; | ||
1514 | static unsigned mlim = 0xffffffff; | ||
1515 | |||
1516 | void | ||
1517 | memzcan(void) | ||
1518 | { | ||
1519 | unsigned char v; | ||
1520 | unsigned a; | ||
1521 | int ok, ook; | ||
1522 | |||
1523 | scanhex(&mdest); | ||
1524 | if (termch != '\n') termch = 0; | ||
1525 | scanhex(&mskip); | ||
1526 | if (termch != '\n') termch = 0; | ||
1527 | scanhex(&mlim); | ||
1528 | ook = 0; | ||
1529 | for (a = mdest; a < mlim; a += mskip) { | ||
1530 | ok = mread(a, &v, 1); | ||
1531 | if (ok && !ook) { | ||
1532 | printf("%.8x .. ", a); | ||
1533 | fflush(stdout); | ||
1534 | } else if (!ok && ook) | ||
1535 | printf("%.8x\n", a - mskip); | ||
1536 | ook = ok; | ||
1537 | if (a + mskip < a) | ||
1538 | break; | ||
1539 | } | ||
1540 | if (ook) | ||
1541 | printf("%.8x\n", a - mskip); | ||
1542 | } | ||
1543 | |||
1544 | void proccall(void) | ||
1545 | { | ||
1546 | unsigned int args[8]; | ||
1547 | unsigned int ret; | ||
1548 | int i; | ||
1549 | typedef unsigned int (*callfunc_t)(unsigned int, unsigned int, | ||
1550 | unsigned int, unsigned int, unsigned int, | ||
1551 | unsigned int, unsigned int, unsigned int); | ||
1552 | callfunc_t func; | ||
1553 | |||
1554 | scanhex(&adrs); | ||
1555 | if (termch != '\n') | ||
1556 | termch = 0; | ||
1557 | for (i = 0; i < 8; ++i) | ||
1558 | args[i] = 0; | ||
1559 | for (i = 0; i < 8; ++i) { | ||
1560 | if (!scanhex(&args[i]) || termch == '\n') | ||
1561 | break; | ||
1562 | termch = 0; | ||
1563 | } | ||
1564 | func = (callfunc_t) adrs; | ||
1565 | ret = 0; | ||
1566 | if (setjmp(bus_error_jmp) == 0) { | ||
1567 | debugger_fault_handler = handle_fault; | ||
1568 | sync(); | ||
1569 | ret = func(args[0], args[1], args[2], args[3], | ||
1570 | args[4], args[5], args[6], args[7]); | ||
1571 | sync(); | ||
1572 | printf("return value is %x\n", ret); | ||
1573 | } else { | ||
1574 | printf("*** %x exception occurred\n", fault_except); | ||
1575 | } | ||
1576 | debugger_fault_handler = NULL; | ||
1577 | } | ||
1578 | |||
1579 | /* Input scanning routines */ | ||
1580 | int | ||
1581 | skipbl(void) | ||
1582 | { | ||
1583 | int c; | ||
1584 | |||
1585 | if( termch != 0 ){ | ||
1586 | c = termch; | ||
1587 | termch = 0; | ||
1588 | } else | ||
1589 | c = inchar(); | ||
1590 | while( c == ' ' || c == '\t' ) | ||
1591 | c = inchar(); | ||
1592 | return c; | ||
1593 | } | ||
1594 | |||
1595 | #define N_PTREGS 44 | ||
1596 | static char *regnames[N_PTREGS] = { | ||
1597 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", | ||
1598 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", | ||
1599 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", | ||
1600 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", | ||
1601 | "pc", "msr", "or3", "ctr", "lr", "xer", "ccr", "mq", | ||
1602 | "trap", "dar", "dsisr", "res" | ||
1603 | }; | ||
1604 | |||
1605 | int | ||
1606 | scanhex(unsigned *vp) | ||
1607 | { | ||
1608 | int c, d; | ||
1609 | unsigned v; | ||
1610 | |||
1611 | c = skipbl(); | ||
1612 | if (c == '%') { | ||
1613 | /* parse register name */ | ||
1614 | char regname[8]; | ||
1615 | int i; | ||
1616 | |||
1617 | for (i = 0; i < sizeof(regname) - 1; ++i) { | ||
1618 | c = inchar(); | ||
1619 | if (!isalnum(c)) { | ||
1620 | termch = c; | ||
1621 | break; | ||
1622 | } | ||
1623 | regname[i] = c; | ||
1624 | } | ||
1625 | regname[i] = 0; | ||
1626 | for (i = 0; i < N_PTREGS; ++i) { | ||
1627 | if (strcmp(regnames[i], regname) == 0) { | ||
1628 | unsigned *rp = (unsigned *) | ||
1629 | xmon_regs[smp_processor_id()]; | ||
1630 | if (rp == NULL) { | ||
1631 | printf("regs not available\n"); | ||
1632 | return 0; | ||
1633 | } | ||
1634 | *vp = rp[i]; | ||
1635 | return 1; | ||
1636 | } | ||
1637 | } | ||
1638 | printf("invalid register name '%%%s'\n", regname); | ||
1639 | return 0; | ||
1640 | } else if (c == '$') { | ||
1641 | static char symname[128]; | ||
1642 | int i; | ||
1643 | for (i=0; i<63; i++) { | ||
1644 | c = inchar(); | ||
1645 | if (isspace(c)) { | ||
1646 | termch = c; | ||
1647 | break; | ||
1648 | } | ||
1649 | symname[i] = c; | ||
1650 | } | ||
1651 | symname[i++] = 0; | ||
1652 | *vp = 0; | ||
1653 | if (setjmp(bus_error_jmp) == 0) { | ||
1654 | debugger_fault_handler = handle_fault; | ||
1655 | sync(); | ||
1656 | *vp = kallsyms_lookup_name(symname); | ||
1657 | sync(); | ||
1658 | } | ||
1659 | debugger_fault_handler = NULL; | ||
1660 | if (!(*vp)) { | ||
1661 | printf("unknown symbol\n"); | ||
1662 | return 0; | ||
1663 | } | ||
1664 | return 1; | ||
1665 | } | ||
1666 | |||
1667 | d = hexdigit(c); | ||
1668 | if( d == EOF ){ | ||
1669 | termch = c; | ||
1670 | return 0; | ||
1671 | } | ||
1672 | v = 0; | ||
1673 | do { | ||
1674 | v = (v << 4) + d; | ||
1675 | c = inchar(); | ||
1676 | d = hexdigit(c); | ||
1677 | } while( d != EOF ); | ||
1678 | termch = c; | ||
1679 | *vp = v; | ||
1680 | return 1; | ||
1681 | } | ||
1682 | |||
1683 | void | ||
1684 | scannl(void) | ||
1685 | { | ||
1686 | int c; | ||
1687 | |||
1688 | c = termch; | ||
1689 | termch = 0; | ||
1690 | while( c != '\n' ) | ||
1691 | c = inchar(); | ||
1692 | } | ||
1693 | |||
1694 | int hexdigit(int c) | ||
1695 | { | ||
1696 | if( '0' <= c && c <= '9' ) | ||
1697 | return c - '0'; | ||
1698 | if( 'A' <= c && c <= 'F' ) | ||
1699 | return c - ('A' - 10); | ||
1700 | if( 'a' <= c && c <= 'f' ) | ||
1701 | return c - ('a' - 10); | ||
1702 | return EOF; | ||
1703 | } | ||
1704 | |||
1705 | void | ||
1706 | getstring(char *s, int size) | ||
1707 | { | ||
1708 | int c; | ||
1709 | |||
1710 | c = skipbl(); | ||
1711 | do { | ||
1712 | if( size > 1 ){ | ||
1713 | *s++ = c; | ||
1714 | --size; | ||
1715 | } | ||
1716 | c = inchar(); | ||
1717 | } while( c != ' ' && c != '\t' && c != '\n' ); | ||
1718 | termch = c; | ||
1719 | *s = 0; | ||
1720 | } | ||
1721 | |||
1722 | static char line[256]; | ||
1723 | static char *lineptr; | ||
1724 | |||
1725 | void | ||
1726 | flush_input(void) | ||
1727 | { | ||
1728 | lineptr = NULL; | ||
1729 | } | ||
1730 | |||
1731 | int | ||
1732 | inchar(void) | ||
1733 | { | ||
1734 | if (lineptr == NULL || *lineptr == 0) { | ||
1735 | if (fgets(line, sizeof(line), stdin) == NULL) { | ||
1736 | lineptr = NULL; | ||
1737 | return EOF; | ||
1738 | } | ||
1739 | lineptr = line; | ||
1740 | } | ||
1741 | return *lineptr++; | ||
1742 | } | ||
1743 | |||
1744 | void | ||
1745 | take_input(char *str) | ||
1746 | { | ||
1747 | lineptr = str; | ||
1748 | } | ||
1749 | |||
1750 | static void | ||
1751 | symbol_lookup(void) | ||
1752 | { | ||
1753 | int type = inchar(); | ||
1754 | unsigned addr; | ||
1755 | static char tmp[128]; | ||
1756 | |||
1757 | switch (type) { | ||
1758 | case 'a': | ||
1759 | if (scanhex(&addr)) | ||
1760 | xmon_print_symbol(addr, ": ", "\n"); | ||
1761 | termch = 0; | ||
1762 | break; | ||
1763 | case 's': | ||
1764 | getstring(tmp, 64); | ||
1765 | if (setjmp(bus_error_jmp) == 0) { | ||
1766 | debugger_fault_handler = handle_fault; | ||
1767 | sync(); | ||
1768 | addr = kallsyms_lookup_name(tmp); | ||
1769 | if (addr) | ||
1770 | printf("%s: %lx\n", tmp, addr); | ||
1771 | else | ||
1772 | printf("Symbol '%s' not found.\n", tmp); | ||
1773 | sync(); | ||
1774 | } | ||
1775 | debugger_fault_handler = NULL; | ||
1776 | termch = 0; | ||
1777 | break; | ||
1778 | } | ||
1779 | } | ||
1780 | |||