]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Routines providing a simple monitor for use on the PowerMac. | |
3 | * | |
fca5dcd4 | 4 | * Copyright (C) 1996-2005 Paul Mackerras. |
1da177e4 LT |
5 | * |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
1da177e4 LT |
11 | #include <linux/errno.h> |
12 | #include <linux/sched.h> | |
13 | #include <linux/smp.h> | |
14 | #include <linux/mm.h> | |
15 | #include <linux/reboot.h> | |
16 | #include <linux/delay.h> | |
17 | #include <linux/kallsyms.h> | |
18 | #include <linux/cpumask.h> | |
f78541dc | 19 | #include <linux/module.h> |
fca5dcd4 | 20 | #include <linux/sysrq.h> |
4694ca02 | 21 | #include <linux/interrupt.h> |
1da177e4 LT |
22 | |
23 | #include <asm/ptrace.h> | |
24 | #include <asm/string.h> | |
25 | #include <asm/prom.h> | |
26 | #include <asm/machdep.h> | |
f78541dc | 27 | #include <asm/xmon.h> |
1da177e4 LT |
28 | #include <asm/processor.h> |
29 | #include <asm/pgtable.h> | |
30 | #include <asm/mmu.h> | |
31 | #include <asm/mmu_context.h> | |
1da177e4 LT |
32 | #include <asm/cputable.h> |
33 | #include <asm/rtas.h> | |
34 | #include <asm/sstep.h> | |
35 | #include <asm/bug.h> | |
f78541dc PM |
36 | |
37 | #ifdef CONFIG_PPC64 | |
1da177e4 | 38 | #include <asm/hvcall.h> |
f78541dc PM |
39 | #include <asm/paca.h> |
40 | #endif | |
1da177e4 LT |
41 | |
42 | #include "nonstdio.h" | |
1da177e4 LT |
43 | |
44 | #define scanhex xmon_scanhex | |
45 | #define skipbl xmon_skipbl | |
46 | ||
47 | #ifdef CONFIG_SMP | |
48 | cpumask_t cpus_in_xmon = CPU_MASK_NONE; | |
49 | static unsigned long xmon_taken = 1; | |
50 | static int xmon_owner; | |
51 | static int xmon_gate; | |
52 | #endif /* CONFIG_SMP */ | |
53 | ||
54 | static unsigned long in_xmon = 0; | |
55 | ||
56 | static unsigned long adrs; | |
57 | static int size = 1; | |
58 | #define MAX_DUMP (128 * 1024) | |
59 | static unsigned long ndump = 64; | |
60 | static unsigned long nidump = 16; | |
61 | static unsigned long ncsum = 4096; | |
62 | static int termch; | |
63 | static char tmpstr[128]; | |
64 | ||
f78541dc | 65 | #define JMP_BUF_LEN 23 |
1da177e4 LT |
66 | static long bus_error_jmp[JMP_BUF_LEN]; |
67 | static int catch_memory_errors; | |
68 | static long *xmon_fault_jmp[NR_CPUS]; | |
69 | #define setjmp xmon_setjmp | |
70 | #define longjmp xmon_longjmp | |
71 | ||
72 | /* Breakpoint stuff */ | |
73 | struct bpt { | |
74 | unsigned long address; | |
75 | unsigned int instr[2]; | |
76 | atomic_t ref_count; | |
77 | int enabled; | |
78 | unsigned long pad; | |
79 | }; | |
80 | ||
81 | /* Bits in bpt.enabled */ | |
82 | #define BP_IABR_TE 1 /* IABR translation enabled */ | |
83 | #define BP_IABR 2 | |
84 | #define BP_TRAP 8 | |
85 | #define BP_DABR 0x10 | |
86 | ||
87 | #define NBPTS 256 | |
88 | static struct bpt bpts[NBPTS]; | |
89 | static struct bpt dabr; | |
90 | static struct bpt *iabr; | |
91 | static unsigned bpinstr = 0x7fe00008; /* trap */ | |
92 | ||
93 | #define BP_NUM(bp) ((bp) - bpts + 1) | |
94 | ||
95 | /* Prototypes */ | |
96 | static int cmds(struct pt_regs *); | |
97 | static int mread(unsigned long, void *, int); | |
98 | static int mwrite(unsigned long, void *, int); | |
99 | static int handle_fault(struct pt_regs *); | |
100 | static void byterev(unsigned char *, int); | |
101 | static void memex(void); | |
102 | static int bsesc(void); | |
103 | static void dump(void); | |
104 | static void prdump(unsigned long, long); | |
105 | static int ppc_inst_dump(unsigned long, long, int); | |
106 | void print_address(unsigned long); | |
107 | static void backtrace(struct pt_regs *); | |
108 | static void excprint(struct pt_regs *); | |
109 | static void prregs(struct pt_regs *); | |
110 | static void memops(int); | |
111 | static void memlocate(void); | |
112 | static void memzcan(void); | |
113 | static void memdiffs(unsigned char *, unsigned char *, unsigned, unsigned); | |
114 | int skipbl(void); | |
115 | int scanhex(unsigned long *valp); | |
116 | static void scannl(void); | |
117 | static int hexdigit(int); | |
118 | void getstring(char *, int); | |
119 | static void flush_input(void); | |
120 | static int inchar(void); | |
121 | static void take_input(char *); | |
122 | static unsigned long read_spr(int); | |
123 | static void write_spr(int, unsigned long); | |
124 | static void super_regs(void); | |
125 | static void remove_bpts(void); | |
126 | static void insert_bpts(void); | |
127 | static void remove_cpu_bpts(void); | |
128 | static void insert_cpu_bpts(void); | |
129 | static struct bpt *at_breakpoint(unsigned long pc); | |
130 | static struct bpt *in_breakpoint_table(unsigned long pc, unsigned long *offp); | |
131 | static int do_step(struct pt_regs *); | |
132 | static void bpt_cmds(void); | |
133 | static void cacheflush(void); | |
134 | static int cpu_cmd(void); | |
135 | static void csum(void); | |
136 | static void bootcmds(void); | |
f78541dc | 137 | static void proccall(void); |
1da177e4 LT |
138 | void dump_segments(void); |
139 | static void symbol_lookup(void); | |
140 | static void xmon_print_symbol(unsigned long address, const char *mid, | |
141 | const char *after); | |
142 | static const char *getvecname(unsigned long vec); | |
143 | ||
1da177e4 | 144 | extern int print_insn_powerpc(unsigned long, unsigned long, int); |
f78541dc PM |
145 | |
146 | extern void xmon_enter(void); | |
147 | extern void xmon_leave(void); | |
148 | ||
f78541dc PM |
149 | extern long setjmp(long *); |
150 | extern void longjmp(long *, long); | |
151 | extern void xmon_save_regs(struct pt_regs *); | |
152 | ||
153 | #ifdef CONFIG_PPC64 | |
154 | #define REG "%.16lx" | |
155 | #define REGS_PER_LINE 4 | |
156 | #define LAST_VOLATILE 13 | |
157 | #else | |
158 | #define REG "%.8lx" | |
159 | #define REGS_PER_LINE 8 | |
160 | #define LAST_VOLATILE 12 | |
161 | #endif | |
1da177e4 LT |
162 | |
163 | #define GETWORD(v) (((v)[0] << 24) + ((v)[1] << 16) + ((v)[2] << 8) + (v)[3]) | |
164 | ||
165 | #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ | |
166 | || ('a' <= (c) && (c) <= 'f') \ | |
167 | || ('A' <= (c) && (c) <= 'F')) | |
168 | #define isalnum(c) (('0' <= (c) && (c) <= '9') \ | |
169 | || ('a' <= (c) && (c) <= 'z') \ | |
170 | || ('A' <= (c) && (c) <= 'Z')) | |
171 | #define isspace(c) (c == ' ' || c == '\t' || c == 10 || c == 13 || c == 0) | |
172 | ||
173 | static char *help_string = "\ | |
174 | Commands:\n\ | |
175 | b show breakpoints\n\ | |
176 | bd set data breakpoint\n\ | |
177 | bi set instruction breakpoint\n\ | |
178 | bc clear breakpoint\n" | |
179 | #ifdef CONFIG_SMP | |
180 | "\ | |
181 | c print cpus stopped in xmon\n\ | |
182 | c# try to switch to cpu number h (in hex)\n" | |
183 | #endif | |
184 | "\ | |
185 | C checksum\n\ | |
186 | d dump bytes\n\ | |
187 | di dump instructions\n\ | |
188 | df dump float values\n\ | |
189 | dd dump double values\n\ | |
7e5b5938 | 190 | dr dump stream of raw bytes\n\ |
1da177e4 LT |
191 | e print exception information\n\ |
192 | f flush cache\n\ | |
193 | la lookup symbol+offset of specified address\n\ | |
194 | ls lookup address of specified symbol\n\ | |
195 | m examine/change memory\n\ | |
196 | mm move a block of memory\n\ | |
197 | ms set a block of memory\n\ | |
198 | md compare two blocks of memory\n\ | |
199 | ml locate a block of memory\n\ | |
200 | mz zero a block of memory\n\ | |
201 | mi show information about memory allocation\n\ | |
f78541dc | 202 | p call a procedure\n\ |
1da177e4 LT |
203 | r print registers\n\ |
204 | s single step\n\ | |
205 | S print special registers\n\ | |
206 | t print backtrace\n\ | |
1da177e4 | 207 | x exit monitor and recover\n\ |
f78541dc PM |
208 | X exit monitor and dont recover\n" |
209 | #ifdef CONFIG_PPC64 | |
210 | " u dump segment table or SLB\n" | |
211 | #endif | |
212 | #ifdef CONFIG_PPC_STD_MMU_32 | |
213 | " u dump segment registers\n" | |
214 | #endif | |
215 | " ? help\n" | |
216 | " zr reboot\n\ | |
1da177e4 LT |
217 | zh halt\n" |
218 | ; | |
219 | ||
220 | static struct pt_regs *xmon_regs; | |
221 | ||
f78541dc | 222 | static inline void sync(void) |
1da177e4 LT |
223 | { |
224 | asm volatile("sync; isync"); | |
225 | } | |
226 | ||
f78541dc PM |
227 | static inline void store_inst(void *p) |
228 | { | |
229 | asm volatile ("dcbst 0,%0; sync; icbi 0,%0; isync" : : "r" (p)); | |
230 | } | |
231 | ||
232 | static inline void cflush(void *p) | |
233 | { | |
234 | asm volatile ("dcbf 0,%0; icbi 0,%0" : : "r" (p)); | |
235 | } | |
236 | ||
237 | static inline void cinval(void *p) | |
238 | { | |
239 | asm volatile ("dcbi 0,%0; icbi 0,%0" : : "r" (p)); | |
240 | } | |
1da177e4 LT |
241 | |
242 | /* | |
243 | * Disable surveillance (the service processor watchdog function) | |
244 | * while we are in xmon. | |
245 | * XXX we should re-enable it when we leave. :) | |
246 | */ | |
247 | #define SURVEILLANCE_TOKEN 9000 | |
248 | ||
249 | static inline void disable_surveillance(void) | |
250 | { | |
251 | #ifdef CONFIG_PPC_PSERIES | |
252 | /* Since this can't be a module, args should end up below 4GB. */ | |
253 | static struct rtas_args args; | |
254 | ||
255 | /* | |
256 | * At this point we have got all the cpus we can into | |
257 | * xmon, so there is hopefully no other cpu calling RTAS | |
258 | * at the moment, even though we don't take rtas.lock. | |
259 | * If we did try to take rtas.lock there would be a | |
260 | * real possibility of deadlock. | |
261 | */ | |
262 | args.token = rtas_token("set-indicator"); | |
263 | if (args.token == RTAS_UNKNOWN_SERVICE) | |
264 | return; | |
265 | args.nargs = 3; | |
266 | args.nret = 1; | |
267 | args.rets = &args.args[3]; | |
268 | args.args[0] = SURVEILLANCE_TOKEN; | |
269 | args.args[1] = 0; | |
270 | args.args[2] = 0; | |
271 | enter_rtas(__pa(&args)); | |
272 | #endif /* CONFIG_PPC_PSERIES */ | |
273 | } | |
274 | ||
275 | #ifdef CONFIG_SMP | |
276 | static int xmon_speaker; | |
277 | ||
278 | static void get_output_lock(void) | |
279 | { | |
280 | int me = smp_processor_id() + 0x100; | |
281 | int last_speaker = 0, prev; | |
282 | long timeout; | |
283 | ||
284 | if (xmon_speaker == me) | |
285 | return; | |
286 | for (;;) { | |
287 | if (xmon_speaker == 0) { | |
288 | last_speaker = cmpxchg(&xmon_speaker, 0, me); | |
289 | if (last_speaker == 0) | |
290 | return; | |
291 | } | |
292 | timeout = 10000000; | |
293 | while (xmon_speaker == last_speaker) { | |
294 | if (--timeout > 0) | |
295 | continue; | |
296 | /* hostile takeover */ | |
297 | prev = cmpxchg(&xmon_speaker, last_speaker, me); | |
298 | if (prev == last_speaker) | |
299 | return; | |
300 | break; | |
301 | } | |
302 | } | |
303 | } | |
304 | ||
305 | static void release_output_lock(void) | |
306 | { | |
307 | xmon_speaker = 0; | |
308 | } | |
309 | #endif | |
310 | ||
b0da9856 | 311 | static int xmon_core(struct pt_regs *regs, int fromipi) |
1da177e4 LT |
312 | { |
313 | int cmd = 0; | |
314 | unsigned long msr; | |
315 | struct bpt *bp; | |
316 | long recurse_jmp[JMP_BUF_LEN]; | |
317 | unsigned long offset; | |
318 | #ifdef CONFIG_SMP | |
319 | int cpu; | |
320 | int secondary; | |
321 | unsigned long timeout; | |
322 | #endif | |
323 | ||
f78541dc PM |
324 | msr = mfmsr(); |
325 | mtmsr(msr & ~MSR_EE); /* disable interrupts */ | |
1da177e4 LT |
326 | |
327 | bp = in_breakpoint_table(regs->nip, &offset); | |
328 | if (bp != NULL) { | |
329 | regs->nip = bp->address + offset; | |
330 | atomic_dec(&bp->ref_count); | |
331 | } | |
332 | ||
333 | remove_cpu_bpts(); | |
334 | ||
335 | #ifdef CONFIG_SMP | |
336 | cpu = smp_processor_id(); | |
337 | if (cpu_isset(cpu, cpus_in_xmon)) { | |
338 | get_output_lock(); | |
339 | excprint(regs); | |
340 | printf("cpu 0x%x: Exception %lx %s in xmon, " | |
341 | "returning to main loop\n", | |
342 | cpu, regs->trap, getvecname(TRAP(regs))); | |
5cb4cc0d | 343 | release_output_lock(); |
1da177e4 LT |
344 | longjmp(xmon_fault_jmp[cpu], 1); |
345 | } | |
346 | ||
347 | if (setjmp(recurse_jmp) != 0) { | |
348 | if (!in_xmon || !xmon_gate) { | |
5cb4cc0d | 349 | get_output_lock(); |
1da177e4 LT |
350 | printf("xmon: WARNING: bad recursive fault " |
351 | "on cpu 0x%x\n", cpu); | |
5cb4cc0d | 352 | release_output_lock(); |
1da177e4 LT |
353 | goto waiting; |
354 | } | |
355 | secondary = !(xmon_taken && cpu == xmon_owner); | |
356 | goto cmdloop; | |
357 | } | |
358 | ||
359 | xmon_fault_jmp[cpu] = recurse_jmp; | |
360 | cpu_set(cpu, cpus_in_xmon); | |
361 | ||
362 | bp = NULL; | |
363 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) == (MSR_IR|MSR_SF)) | |
364 | bp = at_breakpoint(regs->nip); | |
365 | if (bp || (regs->msr & MSR_RI) == 0) | |
366 | fromipi = 0; | |
367 | ||
368 | if (!fromipi) { | |
369 | get_output_lock(); | |
370 | excprint(regs); | |
371 | if (bp) { | |
372 | printf("cpu 0x%x stopped at breakpoint 0x%x (", | |
373 | cpu, BP_NUM(bp)); | |
374 | xmon_print_symbol(regs->nip, " ", ")\n"); | |
375 | } | |
376 | if ((regs->msr & MSR_RI) == 0) | |
377 | printf("WARNING: exception is not recoverable, " | |
378 | "can't continue\n"); | |
379 | release_output_lock(); | |
380 | } | |
381 | ||
382 | waiting: | |
383 | secondary = 1; | |
384 | while (secondary && !xmon_gate) { | |
385 | if (in_xmon == 0) { | |
386 | if (fromipi) | |
387 | goto leave; | |
388 | secondary = test_and_set_bit(0, &in_xmon); | |
389 | } | |
390 | barrier(); | |
391 | } | |
392 | ||
393 | if (!secondary && !xmon_gate) { | |
394 | /* we are the first cpu to come in */ | |
395 | /* interrupt other cpu(s) */ | |
396 | int ncpus = num_online_cpus(); | |
397 | ||
398 | xmon_owner = cpu; | |
399 | mb(); | |
400 | if (ncpus > 1) { | |
401 | smp_send_debugger_break(MSG_ALL_BUT_SELF); | |
402 | /* wait for other cpus to come in */ | |
403 | for (timeout = 100000000; timeout != 0; --timeout) { | |
404 | if (cpus_weight(cpus_in_xmon) >= ncpus) | |
405 | break; | |
406 | barrier(); | |
407 | } | |
408 | } | |
409 | remove_bpts(); | |
410 | disable_surveillance(); | |
411 | /* for breakpoint or single step, print the current instr. */ | |
412 | if (bp || TRAP(regs) == 0xd00) | |
413 | ppc_inst_dump(regs->nip, 1, 0); | |
414 | printf("enter ? for help\n"); | |
415 | mb(); | |
416 | xmon_gate = 1; | |
417 | barrier(); | |
418 | } | |
419 | ||
420 | cmdloop: | |
421 | while (in_xmon) { | |
422 | if (secondary) { | |
423 | if (cpu == xmon_owner) { | |
424 | if (!test_and_set_bit(0, &xmon_taken)) { | |
425 | secondary = 0; | |
426 | continue; | |
427 | } | |
428 | /* missed it */ | |
429 | while (cpu == xmon_owner) | |
430 | barrier(); | |
431 | } | |
432 | barrier(); | |
433 | } else { | |
434 | cmd = cmds(regs); | |
435 | if (cmd != 0) { | |
436 | /* exiting xmon */ | |
437 | insert_bpts(); | |
438 | xmon_gate = 0; | |
439 | wmb(); | |
440 | in_xmon = 0; | |
441 | break; | |
442 | } | |
443 | /* have switched to some other cpu */ | |
444 | secondary = 1; | |
445 | } | |
446 | } | |
447 | leave: | |
448 | cpu_clear(cpu, cpus_in_xmon); | |
449 | xmon_fault_jmp[cpu] = NULL; | |
1da177e4 LT |
450 | #else |
451 | /* UP is simple... */ | |
452 | if (in_xmon) { | |
453 | printf("Exception %lx %s in xmon, returning to main loop\n", | |
454 | regs->trap, getvecname(TRAP(regs))); | |
455 | longjmp(xmon_fault_jmp[0], 1); | |
456 | } | |
457 | if (setjmp(recurse_jmp) == 0) { | |
458 | xmon_fault_jmp[0] = recurse_jmp; | |
459 | in_xmon = 1; | |
460 | ||
461 | excprint(regs); | |
462 | bp = at_breakpoint(regs->nip); | |
463 | if (bp) { | |
464 | printf("Stopped at breakpoint %x (", BP_NUM(bp)); | |
465 | xmon_print_symbol(regs->nip, " ", ")\n"); | |
466 | } | |
467 | if ((regs->msr & MSR_RI) == 0) | |
468 | printf("WARNING: exception is not recoverable, " | |
469 | "can't continue\n"); | |
470 | remove_bpts(); | |
471 | disable_surveillance(); | |
472 | /* for breakpoint or single step, print the current instr. */ | |
473 | if (bp || TRAP(regs) == 0xd00) | |
474 | ppc_inst_dump(regs->nip, 1, 0); | |
475 | printf("enter ? for help\n"); | |
476 | } | |
477 | ||
478 | cmd = cmds(regs); | |
479 | ||
480 | insert_bpts(); | |
481 | in_xmon = 0; | |
482 | #endif | |
483 | ||
484 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) == (MSR_IR|MSR_SF)) { | |
485 | bp = at_breakpoint(regs->nip); | |
486 | if (bp != NULL) { | |
487 | int stepped = emulate_step(regs, bp->instr[0]); | |
488 | if (stepped == 0) { | |
489 | regs->nip = (unsigned long) &bp->instr[0]; | |
490 | atomic_inc(&bp->ref_count); | |
491 | } else if (stepped < 0) { | |
492 | printf("Couldn't single-step %s instruction\n", | |
493 | (IS_RFID(bp->instr[0])? "rfid": "mtmsrd")); | |
494 | } | |
495 | } | |
496 | } | |
497 | ||
498 | insert_cpu_bpts(); | |
499 | ||
f78541dc | 500 | mtmsr(msr); /* restore interrupt enable */ |
1da177e4 LT |
501 | |
502 | return cmd != 'X'; | |
503 | } | |
504 | ||
505 | int xmon(struct pt_regs *excp) | |
506 | { | |
507 | struct pt_regs regs; | |
508 | ||
509 | if (excp == NULL) { | |
f78541dc | 510 | xmon_save_regs(®s); |
1da177e4 LT |
511 | excp = ®s; |
512 | } | |
513 | return xmon_core(excp, 0); | |
514 | } | |
f78541dc PM |
515 | EXPORT_SYMBOL(xmon); |
516 | ||
517 | irqreturn_t | |
518 | xmon_irq(int irq, void *d, struct pt_regs *regs) | |
519 | { | |
520 | unsigned long flags; | |
521 | local_irq_save(flags); | |
522 | printf("Keyboard interrupt\n"); | |
523 | xmon(regs); | |
524 | local_irq_restore(flags); | |
525 | return IRQ_HANDLED; | |
526 | } | |
1da177e4 | 527 | |
b0da9856 | 528 | static int xmon_bpt(struct pt_regs *regs) |
1da177e4 LT |
529 | { |
530 | struct bpt *bp; | |
531 | unsigned long offset; | |
532 | ||
533 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) != (MSR_IR|MSR_SF)) | |
534 | return 0; | |
535 | ||
536 | /* Are we at the trap at bp->instr[1] for some bp? */ | |
537 | bp = in_breakpoint_table(regs->nip, &offset); | |
538 | if (bp != NULL && offset == 4) { | |
539 | regs->nip = bp->address + 4; | |
540 | atomic_dec(&bp->ref_count); | |
541 | return 1; | |
542 | } | |
543 | ||
544 | /* Are we at a breakpoint? */ | |
545 | bp = at_breakpoint(regs->nip); | |
546 | if (!bp) | |
547 | return 0; | |
548 | ||
549 | xmon_core(regs, 0); | |
550 | ||
551 | return 1; | |
552 | } | |
553 | ||
b0da9856 | 554 | static int xmon_sstep(struct pt_regs *regs) |
1da177e4 LT |
555 | { |
556 | if (user_mode(regs)) | |
557 | return 0; | |
558 | xmon_core(regs, 0); | |
559 | return 1; | |
560 | } | |
561 | ||
b0da9856 | 562 | static int xmon_dabr_match(struct pt_regs *regs) |
1da177e4 LT |
563 | { |
564 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) != (MSR_IR|MSR_SF)) | |
565 | return 0; | |
fd9648df AB |
566 | if (dabr.enabled == 0) |
567 | return 0; | |
1da177e4 LT |
568 | xmon_core(regs, 0); |
569 | return 1; | |
570 | } | |
571 | ||
b0da9856 | 572 | static int xmon_iabr_match(struct pt_regs *regs) |
1da177e4 LT |
573 | { |
574 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) != (MSR_IR|MSR_SF)) | |
575 | return 0; | |
576 | if (iabr == 0) | |
577 | return 0; | |
578 | xmon_core(regs, 0); | |
579 | return 1; | |
580 | } | |
581 | ||
b0da9856 | 582 | static int xmon_ipi(struct pt_regs *regs) |
1da177e4 LT |
583 | { |
584 | #ifdef CONFIG_SMP | |
585 | if (in_xmon && !cpu_isset(smp_processor_id(), cpus_in_xmon)) | |
586 | xmon_core(regs, 1); | |
587 | #endif | |
588 | return 0; | |
589 | } | |
590 | ||
b0da9856 | 591 | static int xmon_fault_handler(struct pt_regs *regs) |
1da177e4 LT |
592 | { |
593 | struct bpt *bp; | |
594 | unsigned long offset; | |
595 | ||
596 | if (in_xmon && catch_memory_errors) | |
597 | handle_fault(regs); /* doesn't return */ | |
598 | ||
599 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) == (MSR_IR|MSR_SF)) { | |
600 | bp = in_breakpoint_table(regs->nip, &offset); | |
601 | if (bp != NULL) { | |
602 | regs->nip = bp->address + offset; | |
603 | atomic_dec(&bp->ref_count); | |
604 | } | |
605 | } | |
606 | ||
607 | return 0; | |
608 | } | |
609 | ||
1da177e4 LT |
610 | static struct bpt *at_breakpoint(unsigned long pc) |
611 | { | |
612 | int i; | |
613 | struct bpt *bp; | |
614 | ||
615 | bp = bpts; | |
616 | for (i = 0; i < NBPTS; ++i, ++bp) | |
617 | if (bp->enabled && pc == bp->address) | |
618 | return bp; | |
619 | return NULL; | |
620 | } | |
621 | ||
622 | static struct bpt *in_breakpoint_table(unsigned long nip, unsigned long *offp) | |
623 | { | |
624 | unsigned long off; | |
625 | ||
626 | off = nip - (unsigned long) bpts; | |
627 | if (off >= sizeof(bpts)) | |
628 | return NULL; | |
629 | off %= sizeof(struct bpt); | |
630 | if (off != offsetof(struct bpt, instr[0]) | |
631 | && off != offsetof(struct bpt, instr[1])) | |
632 | return NULL; | |
633 | *offp = off - offsetof(struct bpt, instr[0]); | |
634 | return (struct bpt *) (nip - off); | |
635 | } | |
636 | ||
637 | static struct bpt *new_breakpoint(unsigned long a) | |
638 | { | |
639 | struct bpt *bp; | |
640 | ||
641 | a &= ~3UL; | |
642 | bp = at_breakpoint(a); | |
643 | if (bp) | |
644 | return bp; | |
645 | ||
646 | for (bp = bpts; bp < &bpts[NBPTS]; ++bp) { | |
647 | if (!bp->enabled && atomic_read(&bp->ref_count) == 0) { | |
648 | bp->address = a; | |
649 | bp->instr[1] = bpinstr; | |
650 | store_inst(&bp->instr[1]); | |
651 | return bp; | |
652 | } | |
653 | } | |
654 | ||
655 | printf("Sorry, no free breakpoints. Please clear one first.\n"); | |
656 | return NULL; | |
657 | } | |
658 | ||
659 | static void insert_bpts(void) | |
660 | { | |
661 | int i; | |
662 | struct bpt *bp; | |
663 | ||
664 | bp = bpts; | |
665 | for (i = 0; i < NBPTS; ++i, ++bp) { | |
666 | if ((bp->enabled & (BP_TRAP|BP_IABR)) == 0) | |
667 | continue; | |
668 | if (mread(bp->address, &bp->instr[0], 4) != 4) { | |
669 | printf("Couldn't read instruction at %lx, " | |
670 | "disabling breakpoint there\n", bp->address); | |
671 | bp->enabled = 0; | |
672 | continue; | |
673 | } | |
674 | if (IS_MTMSRD(bp->instr[0]) || IS_RFID(bp->instr[0])) { | |
675 | printf("Breakpoint at %lx is on an mtmsrd or rfid " | |
676 | "instruction, disabling it\n", bp->address); | |
677 | bp->enabled = 0; | |
678 | continue; | |
679 | } | |
680 | store_inst(&bp->instr[0]); | |
681 | if (bp->enabled & BP_IABR) | |
682 | continue; | |
683 | if (mwrite(bp->address, &bpinstr, 4) != 4) { | |
684 | printf("Couldn't write instruction at %lx, " | |
685 | "disabling breakpoint there\n", bp->address); | |
686 | bp->enabled &= ~BP_TRAP; | |
687 | continue; | |
688 | } | |
689 | store_inst((void *)bp->address); | |
690 | } | |
691 | } | |
692 | ||
693 | static void insert_cpu_bpts(void) | |
694 | { | |
695 | if (dabr.enabled) | |
fd9648df | 696 | set_dabr(dabr.address | (dabr.enabled & 7)); |
1da177e4 | 697 | if (iabr && cpu_has_feature(CPU_FTR_IABR)) |
f78541dc | 698 | mtspr(SPRN_IABR, iabr->address |
1da177e4 LT |
699 | | (iabr->enabled & (BP_IABR|BP_IABR_TE))); |
700 | } | |
701 | ||
702 | static void remove_bpts(void) | |
703 | { | |
704 | int i; | |
705 | struct bpt *bp; | |
706 | unsigned instr; | |
707 | ||
708 | bp = bpts; | |
709 | for (i = 0; i < NBPTS; ++i, ++bp) { | |
710 | if ((bp->enabled & (BP_TRAP|BP_IABR)) != BP_TRAP) | |
711 | continue; | |
712 | if (mread(bp->address, &instr, 4) == 4 | |
713 | && instr == bpinstr | |
714 | && mwrite(bp->address, &bp->instr, 4) != 4) | |
715 | printf("Couldn't remove breakpoint at %lx\n", | |
716 | bp->address); | |
717 | else | |
718 | store_inst((void *)bp->address); | |
719 | } | |
720 | } | |
721 | ||
722 | static void remove_cpu_bpts(void) | |
723 | { | |
fd9648df | 724 | set_dabr(0); |
1da177e4 | 725 | if (cpu_has_feature(CPU_FTR_IABR)) |
f78541dc | 726 | mtspr(SPRN_IABR, 0); |
1da177e4 LT |
727 | } |
728 | ||
729 | /* Command interpreting routine */ | |
730 | static char *last_cmd; | |
731 | ||
732 | static int | |
733 | cmds(struct pt_regs *excp) | |
734 | { | |
735 | int cmd = 0; | |
736 | ||
737 | last_cmd = NULL; | |
738 | xmon_regs = excp; | |
739 | for(;;) { | |
740 | #ifdef CONFIG_SMP | |
741 | printf("%x:", smp_processor_id()); | |
742 | #endif /* CONFIG_SMP */ | |
743 | printf("mon> "); | |
1da177e4 LT |
744 | flush_input(); |
745 | termch = 0; | |
746 | cmd = skipbl(); | |
747 | if( cmd == '\n' ) { | |
748 | if (last_cmd == NULL) | |
749 | continue; | |
750 | take_input(last_cmd); | |
751 | last_cmd = NULL; | |
752 | cmd = inchar(); | |
753 | } | |
754 | switch (cmd) { | |
755 | case 'm': | |
756 | cmd = inchar(); | |
757 | switch (cmd) { | |
758 | case 'm': | |
759 | case 's': | |
760 | case 'd': | |
761 | memops(cmd); | |
762 | break; | |
763 | case 'l': | |
764 | memlocate(); | |
765 | break; | |
766 | case 'z': | |
767 | memzcan(); | |
768 | break; | |
769 | case 'i': | |
770 | show_mem(); | |
771 | break; | |
772 | default: | |
773 | termch = cmd; | |
774 | memex(); | |
775 | } | |
776 | break; | |
777 | case 'd': | |
778 | dump(); | |
779 | break; | |
780 | case 'l': | |
781 | symbol_lookup(); | |
782 | break; | |
783 | case 'r': | |
784 | prregs(excp); /* print regs */ | |
785 | break; | |
786 | case 'e': | |
787 | excprint(excp); | |
788 | break; | |
789 | case 'S': | |
790 | super_regs(); | |
791 | break; | |
792 | case 't': | |
793 | backtrace(excp); | |
794 | break; | |
795 | case 'f': | |
796 | cacheflush(); | |
797 | break; | |
798 | case 's': | |
799 | if (do_step(excp)) | |
800 | return cmd; | |
801 | break; | |
802 | case 'x': | |
803 | case 'X': | |
bb6b9b28 | 804 | return cmd; |
1da177e4 | 805 | case EOF: |
bb6b9b28 BH |
806 | printf(" <no input ...>\n"); |
807 | mdelay(2000); | |
1da177e4 LT |
808 | return cmd; |
809 | case '?': | |
810 | printf(help_string); | |
811 | break; | |
1da177e4 LT |
812 | case 'b': |
813 | bpt_cmds(); | |
814 | break; | |
815 | case 'C': | |
816 | csum(); | |
817 | break; | |
818 | case 'c': | |
819 | if (cpu_cmd()) | |
820 | return 0; | |
821 | break; | |
822 | case 'z': | |
823 | bootcmds(); | |
824 | break; | |
f78541dc PM |
825 | case 'p': |
826 | proccall(); | |
1da177e4 | 827 | break; |
f78541dc | 828 | #ifdef CONFIG_PPC_STD_MMU |
1da177e4 LT |
829 | case 'u': |
830 | dump_segments(); | |
831 | break; | |
f78541dc | 832 | #endif |
1da177e4 LT |
833 | default: |
834 | printf("Unrecognized command: "); | |
835 | do { | |
836 | if (' ' < cmd && cmd <= '~') | |
837 | putchar(cmd); | |
838 | else | |
839 | printf("\\x%x", cmd); | |
840 | cmd = inchar(); | |
841 | } while (cmd != '\n'); | |
842 | printf(" (type ? for help)\n"); | |
843 | break; | |
844 | } | |
845 | } | |
846 | } | |
847 | ||
848 | /* | |
849 | * Step a single instruction. | |
850 | * Some instructions we emulate, others we execute with MSR_SE set. | |
851 | */ | |
852 | static int do_step(struct pt_regs *regs) | |
853 | { | |
854 | unsigned int instr; | |
855 | int stepped; | |
856 | ||
857 | /* check we are in 64-bit kernel mode, translation enabled */ | |
858 | if ((regs->msr & (MSR_SF|MSR_PR|MSR_IR)) == (MSR_SF|MSR_IR)) { | |
859 | if (mread(regs->nip, &instr, 4) == 4) { | |
860 | stepped = emulate_step(regs, instr); | |
861 | if (stepped < 0) { | |
862 | printf("Couldn't single-step %s instruction\n", | |
863 | (IS_RFID(instr)? "rfid": "mtmsrd")); | |
864 | return 0; | |
865 | } | |
866 | if (stepped > 0) { | |
867 | regs->trap = 0xd00 | (regs->trap & 1); | |
868 | printf("stepped to "); | |
869 | xmon_print_symbol(regs->nip, " ", "\n"); | |
870 | ppc_inst_dump(regs->nip, 1, 0); | |
871 | return 0; | |
872 | } | |
873 | } | |
874 | } | |
875 | regs->msr |= MSR_SE; | |
876 | return 1; | |
877 | } | |
878 | ||
879 | static void bootcmds(void) | |
880 | { | |
881 | int cmd; | |
882 | ||
883 | cmd = inchar(); | |
884 | if (cmd == 'r') | |
885 | ppc_md.restart(NULL); | |
886 | else if (cmd == 'h') | |
887 | ppc_md.halt(); | |
888 | else if (cmd == 'p') | |
889 | ppc_md.power_off(); | |
890 | } | |
891 | ||
892 | static int cpu_cmd(void) | |
893 | { | |
894 | #ifdef CONFIG_SMP | |
895 | unsigned long cpu; | |
896 | int timeout; | |
897 | int count; | |
898 | ||
899 | if (!scanhex(&cpu)) { | |
900 | /* print cpus waiting or in xmon */ | |
901 | printf("cpus stopped:"); | |
902 | count = 0; | |
903 | for (cpu = 0; cpu < NR_CPUS; ++cpu) { | |
904 | if (cpu_isset(cpu, cpus_in_xmon)) { | |
905 | if (count == 0) | |
906 | printf(" %x", cpu); | |
907 | ++count; | |
908 | } else { | |
909 | if (count > 1) | |
910 | printf("-%x", cpu - 1); | |
911 | count = 0; | |
912 | } | |
913 | } | |
914 | if (count > 1) | |
915 | printf("-%x", NR_CPUS - 1); | |
916 | printf("\n"); | |
917 | return 0; | |
918 | } | |
919 | /* try to switch to cpu specified */ | |
920 | if (!cpu_isset(cpu, cpus_in_xmon)) { | |
921 | printf("cpu 0x%x isn't in xmon\n", cpu); | |
922 | return 0; | |
923 | } | |
924 | xmon_taken = 0; | |
925 | mb(); | |
926 | xmon_owner = cpu; | |
927 | timeout = 10000000; | |
928 | while (!xmon_taken) { | |
929 | if (--timeout == 0) { | |
930 | if (test_and_set_bit(0, &xmon_taken)) | |
931 | break; | |
932 | /* take control back */ | |
933 | mb(); | |
934 | xmon_owner = smp_processor_id(); | |
935 | printf("cpu %u didn't take control\n", cpu); | |
936 | return 0; | |
937 | } | |
938 | barrier(); | |
939 | } | |
940 | return 1; | |
941 | #else | |
942 | return 0; | |
943 | #endif /* CONFIG_SMP */ | |
944 | } | |
945 | ||
946 | static unsigned short fcstab[256] = { | |
947 | 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, | |
948 | 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, | |
949 | 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, | |
950 | 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, | |
951 | 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, | |
952 | 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, | |
953 | 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, | |
954 | 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, | |
955 | 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, | |
956 | 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, | |
957 | 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, | |
958 | 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, | |
959 | 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, | |
960 | 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, | |
961 | 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, | |
962 | 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, | |
963 | 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, | |
964 | 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, | |
965 | 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, | |
966 | 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, | |
967 | 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, | |
968 | 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, | |
969 | 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, | |
970 | 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, | |
971 | 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, | |
972 | 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, | |
973 | 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, | |
974 | 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, | |
975 | 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, | |
976 | 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, | |
977 | 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, | |
978 | 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 | |
979 | }; | |
980 | ||
981 | #define FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff]) | |
982 | ||
983 | static void | |
984 | csum(void) | |
985 | { | |
986 | unsigned int i; | |
987 | unsigned short fcs; | |
988 | unsigned char v; | |
989 | ||
990 | if (!scanhex(&adrs)) | |
991 | return; | |
992 | if (!scanhex(&ncsum)) | |
993 | return; | |
994 | fcs = 0xffff; | |
995 | for (i = 0; i < ncsum; ++i) { | |
996 | if (mread(adrs+i, &v, 1) == 0) { | |
997 | printf("csum stopped at %x\n", adrs+i); | |
998 | break; | |
999 | } | |
1000 | fcs = FCS(fcs, v); | |
1001 | } | |
1002 | printf("%x\n", fcs); | |
1003 | } | |
1004 | ||
1005 | /* | |
1006 | * Check if this is a suitable place to put a breakpoint. | |
1007 | */ | |
1008 | static long check_bp_loc(unsigned long addr) | |
1009 | { | |
1010 | unsigned int instr; | |
1011 | ||
1012 | addr &= ~3; | |
51fae6de | 1013 | if (!is_kernel_addr(addr)) { |
1da177e4 LT |
1014 | printf("Breakpoints may only be placed at kernel addresses\n"); |
1015 | return 0; | |
1016 | } | |
1017 | if (!mread(addr, &instr, sizeof(instr))) { | |
1018 | printf("Can't read instruction at address %lx\n", addr); | |
1019 | return 0; | |
1020 | } | |
1021 | if (IS_MTMSRD(instr) || IS_RFID(instr)) { | |
1022 | printf("Breakpoints may not be placed on mtmsrd or rfid " | |
1023 | "instructions\n"); | |
1024 | return 0; | |
1025 | } | |
1026 | return 1; | |
1027 | } | |
1028 | ||
1029 | static char *breakpoint_help_string = | |
1030 | "Breakpoint command usage:\n" | |
1031 | "b show breakpoints\n" | |
1032 | "b <addr> [cnt] set breakpoint at given instr addr\n" | |
1033 | "bc clear all breakpoints\n" | |
1034 | "bc <n/addr> clear breakpoint number n or at addr\n" | |
1035 | "bi <addr> [cnt] set hardware instr breakpoint (POWER3/RS64 only)\n" | |
1036 | "bd <addr> [cnt] set hardware data breakpoint\n" | |
1037 | ""; | |
1038 | ||
1039 | static void | |
1040 | bpt_cmds(void) | |
1041 | { | |
1042 | int cmd; | |
1043 | unsigned long a; | |
1044 | int mode, i; | |
1045 | struct bpt *bp; | |
1046 | const char badaddr[] = "Only kernel addresses are permitted " | |
1047 | "for breakpoints\n"; | |
1048 | ||
1049 | cmd = inchar(); | |
1050 | switch (cmd) { | |
f78541dc | 1051 | #ifndef CONFIG_8xx |
1da177e4 LT |
1052 | case 'd': /* bd - hardware data breakpoint */ |
1053 | mode = 7; | |
1054 | cmd = inchar(); | |
1055 | if (cmd == 'r') | |
1056 | mode = 5; | |
1057 | else if (cmd == 'w') | |
1058 | mode = 6; | |
1059 | else | |
1060 | termch = cmd; | |
1061 | dabr.address = 0; | |
1062 | dabr.enabled = 0; | |
1063 | if (scanhex(&dabr.address)) { | |
51fae6de | 1064 | if (!is_kernel_addr(dabr.address)) { |
1da177e4 LT |
1065 | printf(badaddr); |
1066 | break; | |
1067 | } | |
1068 | dabr.address &= ~7; | |
1069 | dabr.enabled = mode | BP_DABR; | |
1070 | } | |
1071 | break; | |
1072 | ||
1073 | case 'i': /* bi - hardware instr breakpoint */ | |
1074 | if (!cpu_has_feature(CPU_FTR_IABR)) { | |
1075 | printf("Hardware instruction breakpoint " | |
1076 | "not supported on this cpu\n"); | |
1077 | break; | |
1078 | } | |
1079 | if (iabr) { | |
1080 | iabr->enabled &= ~(BP_IABR | BP_IABR_TE); | |
1081 | iabr = NULL; | |
1082 | } | |
1083 | if (!scanhex(&a)) | |
1084 | break; | |
1085 | if (!check_bp_loc(a)) | |
1086 | break; | |
1087 | bp = new_breakpoint(a); | |
1088 | if (bp != NULL) { | |
1089 | bp->enabled |= BP_IABR | BP_IABR_TE; | |
1090 | iabr = bp; | |
1091 | } | |
1092 | break; | |
f78541dc | 1093 | #endif |
1da177e4 LT |
1094 | |
1095 | case 'c': | |
1096 | if (!scanhex(&a)) { | |
1097 | /* clear all breakpoints */ | |
1098 | for (i = 0; i < NBPTS; ++i) | |
1099 | bpts[i].enabled = 0; | |
1100 | iabr = NULL; | |
1101 | dabr.enabled = 0; | |
1102 | printf("All breakpoints cleared\n"); | |
1103 | break; | |
1104 | } | |
1105 | ||
1106 | if (a <= NBPTS && a >= 1) { | |
1107 | /* assume a breakpoint number */ | |
1108 | bp = &bpts[a-1]; /* bp nums are 1 based */ | |
1109 | } else { | |
1110 | /* assume a breakpoint address */ | |
1111 | bp = at_breakpoint(a); | |
1112 | if (bp == 0) { | |
1113 | printf("No breakpoint at %x\n", a); | |
1114 | break; | |
1115 | } | |
1116 | } | |
1117 | ||
1118 | printf("Cleared breakpoint %x (", BP_NUM(bp)); | |
1119 | xmon_print_symbol(bp->address, " ", ")\n"); | |
1120 | bp->enabled = 0; | |
1121 | break; | |
1122 | ||
1123 | default: | |
1124 | termch = cmd; | |
1125 | cmd = skipbl(); | |
1126 | if (cmd == '?') { | |
1127 | printf(breakpoint_help_string); | |
1128 | break; | |
1129 | } | |
1130 | termch = cmd; | |
1131 | if (!scanhex(&a)) { | |
1132 | /* print all breakpoints */ | |
1133 | printf(" type address\n"); | |
1134 | if (dabr.enabled) { | |
f78541dc | 1135 | printf(" data "REG" [", dabr.address); |
1da177e4 LT |
1136 | if (dabr.enabled & 1) |
1137 | printf("r"); | |
1138 | if (dabr.enabled & 2) | |
1139 | printf("w"); | |
1140 | printf("]\n"); | |
1141 | } | |
1142 | for (bp = bpts; bp < &bpts[NBPTS]; ++bp) { | |
1143 | if (!bp->enabled) | |
1144 | continue; | |
1145 | printf("%2x %s ", BP_NUM(bp), | |
1146 | (bp->enabled & BP_IABR)? "inst": "trap"); | |
1147 | xmon_print_symbol(bp->address, " ", "\n"); | |
1148 | } | |
1149 | break; | |
1150 | } | |
1151 | ||
1152 | if (!check_bp_loc(a)) | |
1153 | break; | |
1154 | bp = new_breakpoint(a); | |
1155 | if (bp != NULL) | |
1156 | bp->enabled |= BP_TRAP; | |
1157 | break; | |
1158 | } | |
1159 | } | |
1160 | ||
1161 | /* Very cheap human name for vector lookup. */ | |
1162 | static | |
1163 | const char *getvecname(unsigned long vec) | |
1164 | { | |
1165 | char *ret; | |
1166 | ||
1167 | switch (vec) { | |
1168 | case 0x100: ret = "(System Reset)"; break; | |
1169 | case 0x200: ret = "(Machine Check)"; break; | |
1170 | case 0x300: ret = "(Data Access)"; break; | |
1171 | case 0x380: ret = "(Data SLB Access)"; break; | |
1172 | case 0x400: ret = "(Instruction Access)"; break; | |
1173 | case 0x480: ret = "(Instruction SLB Access)"; break; | |
1174 | case 0x500: ret = "(Hardware Interrupt)"; break; | |
1175 | case 0x600: ret = "(Alignment)"; break; | |
1176 | case 0x700: ret = "(Program Check)"; break; | |
1177 | case 0x800: ret = "(FPU Unavailable)"; break; | |
1178 | case 0x900: ret = "(Decrementer)"; break; | |
1179 | case 0xc00: ret = "(System Call)"; break; | |
1180 | case 0xd00: ret = "(Single Step)"; break; | |
1181 | case 0xf00: ret = "(Performance Monitor)"; break; | |
1182 | case 0xf20: ret = "(Altivec Unavailable)"; break; | |
1183 | case 0x1300: ret = "(Instruction Breakpoint)"; break; | |
1184 | default: ret = ""; | |
1185 | } | |
1186 | return ret; | |
1187 | } | |
1188 | ||
1189 | static void get_function_bounds(unsigned long pc, unsigned long *startp, | |
1190 | unsigned long *endp) | |
1191 | { | |
1192 | unsigned long size, offset; | |
1193 | const char *name; | |
1194 | char *modname; | |
1195 | ||
1196 | *startp = *endp = 0; | |
1197 | if (pc == 0) | |
1198 | return; | |
1199 | if (setjmp(bus_error_jmp) == 0) { | |
1200 | catch_memory_errors = 1; | |
1201 | sync(); | |
1202 | name = kallsyms_lookup(pc, &size, &offset, &modname, tmpstr); | |
1203 | if (name != NULL) { | |
1204 | *startp = pc - offset; | |
1205 | *endp = pc - offset + size; | |
1206 | } | |
1207 | sync(); | |
1208 | } | |
1209 | catch_memory_errors = 0; | |
1210 | } | |
1211 | ||
1212 | static int xmon_depth_to_print = 64; | |
1213 | ||
f78541dc PM |
1214 | #ifdef CONFIG_PPC64 |
1215 | #define LRSAVE_OFFSET 0x10 | |
1216 | #define REG_FRAME_MARKER 0x7265677368657265ul /* "regshere" */ | |
1217 | #define MARKER_OFFSET 0x60 | |
1218 | #define REGS_OFFSET 0x70 | |
1219 | #else | |
1220 | #define LRSAVE_OFFSET 4 | |
1221 | #define REG_FRAME_MARKER 0x72656773 | |
1222 | #define MARKER_OFFSET 8 | |
1223 | #define REGS_OFFSET 16 | |
1224 | #endif | |
1225 | ||
1da177e4 LT |
1226 | static void xmon_show_stack(unsigned long sp, unsigned long lr, |
1227 | unsigned long pc) | |
1228 | { | |
1229 | unsigned long ip; | |
1230 | unsigned long newsp; | |
1231 | unsigned long marker; | |
1232 | int count = 0; | |
1233 | struct pt_regs regs; | |
1234 | ||
1235 | do { | |
1236 | if (sp < PAGE_OFFSET) { | |
1237 | if (sp != 0) | |
1238 | printf("SP (%lx) is in userspace\n", sp); | |
1239 | break; | |
1240 | } | |
1241 | ||
f78541dc | 1242 | if (!mread(sp + LRSAVE_OFFSET, &ip, sizeof(unsigned long)) |
1da177e4 LT |
1243 | || !mread(sp, &newsp, sizeof(unsigned long))) { |
1244 | printf("Couldn't read stack frame at %lx\n", sp); | |
1245 | break; | |
1246 | } | |
1247 | ||
1248 | /* | |
1249 | * For the first stack frame, try to work out if | |
1250 | * LR and/or the saved LR value in the bottommost | |
1251 | * stack frame are valid. | |
1252 | */ | |
1253 | if ((pc | lr) != 0) { | |
1254 | unsigned long fnstart, fnend; | |
1255 | unsigned long nextip; | |
1256 | int printip = 1; | |
1257 | ||
1258 | get_function_bounds(pc, &fnstart, &fnend); | |
1259 | nextip = 0; | |
1260 | if (newsp > sp) | |
f78541dc | 1261 | mread(newsp + LRSAVE_OFFSET, &nextip, |
1da177e4 LT |
1262 | sizeof(unsigned long)); |
1263 | if (lr == ip) { | |
1264 | if (lr < PAGE_OFFSET | |
1265 | || (fnstart <= lr && lr < fnend)) | |
1266 | printip = 0; | |
1267 | } else if (lr == nextip) { | |
1268 | printip = 0; | |
1269 | } else if (lr >= PAGE_OFFSET | |
1270 | && !(fnstart <= lr && lr < fnend)) { | |
1271 | printf("[link register ] "); | |
1272 | xmon_print_symbol(lr, " ", "\n"); | |
1273 | } | |
1274 | if (printip) { | |
f78541dc | 1275 | printf("["REG"] ", sp); |
1da177e4 LT |
1276 | xmon_print_symbol(ip, " ", " (unreliable)\n"); |
1277 | } | |
1278 | pc = lr = 0; | |
1279 | ||
1280 | } else { | |
f78541dc | 1281 | printf("["REG"] ", sp); |
1da177e4 LT |
1282 | xmon_print_symbol(ip, " ", "\n"); |
1283 | } | |
1284 | ||
1285 | /* Look for "regshere" marker to see if this is | |
1286 | an exception frame. */ | |
f78541dc PM |
1287 | if (mread(sp + MARKER_OFFSET, &marker, sizeof(unsigned long)) |
1288 | && marker == REG_FRAME_MARKER) { | |
1289 | if (mread(sp + REGS_OFFSET, ®s, sizeof(regs)) | |
1da177e4 LT |
1290 | != sizeof(regs)) { |
1291 | printf("Couldn't read registers at %lx\n", | |
f78541dc | 1292 | sp + REGS_OFFSET); |
1da177e4 LT |
1293 | break; |
1294 | } | |
1295 | printf("--- Exception: %lx %s at ", regs.trap, | |
1296 | getvecname(TRAP(®s))); | |
1297 | pc = regs.nip; | |
1298 | lr = regs.link; | |
1299 | xmon_print_symbol(pc, " ", "\n"); | |
1300 | } | |
1301 | ||
1302 | if (newsp == 0) | |
1303 | break; | |
1304 | ||
1305 | sp = newsp; | |
1306 | } while (count++ < xmon_depth_to_print); | |
1307 | } | |
1308 | ||
1309 | static void backtrace(struct pt_regs *excp) | |
1310 | { | |
1311 | unsigned long sp; | |
1312 | ||
1313 | if (scanhex(&sp)) | |
1314 | xmon_show_stack(sp, 0, 0); | |
1315 | else | |
1316 | xmon_show_stack(excp->gpr[1], excp->link, excp->nip); | |
1317 | scannl(); | |
1318 | } | |
1319 | ||
1320 | static void print_bug_trap(struct pt_regs *regs) | |
1321 | { | |
1322 | struct bug_entry *bug; | |
1323 | unsigned long addr; | |
1324 | ||
1325 | if (regs->msr & MSR_PR) | |
1326 | return; /* not in kernel */ | |
1327 | addr = regs->nip; /* address of trap instruction */ | |
1328 | if (addr < PAGE_OFFSET) | |
1329 | return; | |
1330 | bug = find_bug(regs->nip); | |
1331 | if (bug == NULL) | |
1332 | return; | |
1333 | if (bug->line & BUG_WARNING_TRAP) | |
1334 | return; | |
1335 | ||
1336 | printf("kernel BUG in %s at %s:%d!\n", | |
1337 | bug->function, bug->file, (unsigned int)bug->line); | |
1338 | } | |
1339 | ||
1340 | void excprint(struct pt_regs *fp) | |
1341 | { | |
1342 | unsigned long trap; | |
1343 | ||
1344 | #ifdef CONFIG_SMP | |
1345 | printf("cpu 0x%x: ", smp_processor_id()); | |
1346 | #endif /* CONFIG_SMP */ | |
1347 | ||
1348 | trap = TRAP(fp); | |
1349 | printf("Vector: %lx %s at [%lx]\n", fp->trap, getvecname(trap), fp); | |
1350 | printf(" pc: "); | |
1351 | xmon_print_symbol(fp->nip, ": ", "\n"); | |
1352 | ||
1353 | printf(" lr: ", fp->link); | |
1354 | xmon_print_symbol(fp->link, ": ", "\n"); | |
1355 | ||
1356 | printf(" sp: %lx\n", fp->gpr[1]); | |
1357 | printf(" msr: %lx\n", fp->msr); | |
1358 | ||
1359 | if (trap == 0x300 || trap == 0x380 || trap == 0x600) { | |
1360 | printf(" dar: %lx\n", fp->dar); | |
1361 | if (trap != 0x380) | |
1362 | printf(" dsisr: %lx\n", fp->dsisr); | |
1363 | } | |
1364 | ||
1365 | printf(" current = 0x%lx\n", current); | |
f78541dc | 1366 | #ifdef CONFIG_PPC64 |
1da177e4 | 1367 | printf(" paca = 0x%lx\n", get_paca()); |
f78541dc | 1368 | #endif |
1da177e4 LT |
1369 | if (current) { |
1370 | printf(" pid = %ld, comm = %s\n", | |
1371 | current->pid, current->comm); | |
1372 | } | |
1373 | ||
1374 | if (trap == 0x700) | |
1375 | print_bug_trap(fp); | |
1376 | } | |
1377 | ||
1378 | void prregs(struct pt_regs *fp) | |
1379 | { | |
f78541dc | 1380 | int n, trap; |
1da177e4 LT |
1381 | unsigned long base; |
1382 | struct pt_regs regs; | |
1383 | ||
1384 | if (scanhex(&base)) { | |
1385 | if (setjmp(bus_error_jmp) == 0) { | |
1386 | catch_memory_errors = 1; | |
1387 | sync(); | |
1388 | regs = *(struct pt_regs *)base; | |
1389 | sync(); | |
1390 | __delay(200); | |
1391 | } else { | |
1392 | catch_memory_errors = 0; | |
f78541dc | 1393 | printf("*** Error reading registers from "REG"\n", |
1da177e4 LT |
1394 | base); |
1395 | return; | |
1396 | } | |
1397 | catch_memory_errors = 0; | |
1398 | fp = ®s; | |
1399 | } | |
1400 | ||
f78541dc | 1401 | #ifdef CONFIG_PPC64 |
1da177e4 LT |
1402 | if (FULL_REGS(fp)) { |
1403 | for (n = 0; n < 16; ++n) | |
f78541dc | 1404 | printf("R%.2ld = "REG" R%.2ld = "REG"\n", |
1da177e4 LT |
1405 | n, fp->gpr[n], n+16, fp->gpr[n+16]); |
1406 | } else { | |
1407 | for (n = 0; n < 7; ++n) | |
f78541dc | 1408 | printf("R%.2ld = "REG" R%.2ld = "REG"\n", |
1da177e4 LT |
1409 | n, fp->gpr[n], n+7, fp->gpr[n+7]); |
1410 | } | |
f78541dc PM |
1411 | #else |
1412 | for (n = 0; n < 32; ++n) { | |
1413 | printf("R%.2d = %.8x%s", n, fp->gpr[n], | |
1414 | (n & 3) == 3? "\n": " "); | |
1415 | if (n == 12 && !FULL_REGS(fp)) { | |
1416 | printf("\n"); | |
1417 | break; | |
1418 | } | |
1419 | } | |
1420 | #endif | |
1da177e4 LT |
1421 | printf("pc = "); |
1422 | xmon_print_symbol(fp->nip, " ", "\n"); | |
1423 | printf("lr = "); | |
1424 | xmon_print_symbol(fp->link, " ", "\n"); | |
f78541dc PM |
1425 | printf("msr = "REG" cr = %.8lx\n", fp->msr, fp->ccr); |
1426 | printf("ctr = "REG" xer = "REG" trap = %4lx\n", | |
1da177e4 | 1427 | fp->ctr, fp->xer, fp->trap); |
f78541dc PM |
1428 | trap = TRAP(fp); |
1429 | if (trap == 0x300 || trap == 0x380 || trap == 0x600) | |
1430 | printf("dar = "REG" dsisr = %.8lx\n", fp->dar, fp->dsisr); | |
1da177e4 LT |
1431 | } |
1432 | ||
1433 | void cacheflush(void) | |
1434 | { | |
1435 | int cmd; | |
1436 | unsigned long nflush; | |
1437 | ||
1438 | cmd = inchar(); | |
1439 | if (cmd != 'i') | |
1440 | termch = cmd; | |
1441 | scanhex((void *)&adrs); | |
1442 | if (termch != '\n') | |
1443 | termch = 0; | |
1444 | nflush = 1; | |
1445 | scanhex(&nflush); | |
1446 | nflush = (nflush + L1_CACHE_BYTES - 1) / L1_CACHE_BYTES; | |
1447 | if (setjmp(bus_error_jmp) == 0) { | |
1448 | catch_memory_errors = 1; | |
1449 | sync(); | |
1450 | ||
1451 | if (cmd != 'i') { | |
1452 | for (; nflush > 0; --nflush, adrs += L1_CACHE_BYTES) | |
1453 | cflush((void *) adrs); | |
1454 | } else { | |
1455 | for (; nflush > 0; --nflush, adrs += L1_CACHE_BYTES) | |
1456 | cinval((void *) adrs); | |
1457 | } | |
1458 | sync(); | |
1459 | /* wait a little while to see if we get a machine check */ | |
1460 | __delay(200); | |
1461 | } | |
1462 | catch_memory_errors = 0; | |
1463 | } | |
1464 | ||
1465 | unsigned long | |
1466 | read_spr(int n) | |
1467 | { | |
1468 | unsigned int instrs[2]; | |
1469 | unsigned long (*code)(void); | |
1da177e4 | 1470 | unsigned long ret = -1UL; |
548ccebc PM |
1471 | #ifdef CONFIG_PPC64 |
1472 | unsigned long opd[3]; | |
1da177e4 | 1473 | |
1da177e4 LT |
1474 | opd[0] = (unsigned long)instrs; |
1475 | opd[1] = 0; | |
1476 | opd[2] = 0; | |
548ccebc PM |
1477 | code = (unsigned long (*)(void)) opd; |
1478 | #else | |
1479 | code = (unsigned long (*)(void)) instrs; | |
1480 | #endif | |
1481 | ||
1482 | /* mfspr r3,n; blr */ | |
1483 | instrs[0] = 0x7c6002a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6); | |
1484 | instrs[1] = 0x4e800020; | |
1da177e4 LT |
1485 | store_inst(instrs); |
1486 | store_inst(instrs+1); | |
1da177e4 LT |
1487 | |
1488 | if (setjmp(bus_error_jmp) == 0) { | |
1489 | catch_memory_errors = 1; | |
1490 | sync(); | |
1491 | ||
1492 | ret = code(); | |
1493 | ||
1494 | sync(); | |
1495 | /* wait a little while to see if we get a machine check */ | |
1496 | __delay(200); | |
1497 | n = size; | |
1498 | } | |
1499 | ||
1500 | return ret; | |
1501 | } | |
1502 | ||
1503 | void | |
1504 | write_spr(int n, unsigned long val) | |
1505 | { | |
1506 | unsigned int instrs[2]; | |
1507 | unsigned long (*code)(unsigned long); | |
548ccebc | 1508 | #ifdef CONFIG_PPC64 |
1da177e4 LT |
1509 | unsigned long opd[3]; |
1510 | ||
1da177e4 LT |
1511 | opd[0] = (unsigned long)instrs; |
1512 | opd[1] = 0; | |
1513 | opd[2] = 0; | |
548ccebc PM |
1514 | code = (unsigned long (*)(unsigned long)) opd; |
1515 | #else | |
1516 | code = (unsigned long (*)(unsigned long)) instrs; | |
1517 | #endif | |
1518 | ||
1519 | instrs[0] = 0x7c6003a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6); | |
1520 | instrs[1] = 0x4e800020; | |
1da177e4 LT |
1521 | store_inst(instrs); |
1522 | store_inst(instrs+1); | |
1da177e4 LT |
1523 | |
1524 | if (setjmp(bus_error_jmp) == 0) { | |
1525 | catch_memory_errors = 1; | |
1526 | sync(); | |
1527 | ||
1528 | code(val); | |
1529 | ||
1530 | sync(); | |
1531 | /* wait a little while to see if we get a machine check */ | |
1532 | __delay(200); | |
1533 | n = size; | |
1534 | } | |
1535 | } | |
1536 | ||
1537 | static unsigned long regno; | |
1538 | extern char exc_prolog; | |
1539 | extern char dec_exc; | |
1540 | ||
f78541dc | 1541 | void super_regs(void) |
1da177e4 LT |
1542 | { |
1543 | int cmd; | |
1544 | unsigned long val; | |
1545 | #ifdef CONFIG_PPC_ISERIES | |
1546 | struct paca_struct *ptrPaca = NULL; | |
1547 | struct lppaca *ptrLpPaca = NULL; | |
1548 | struct ItLpRegSave *ptrLpRegSave = NULL; | |
1549 | #endif | |
1550 | ||
1551 | cmd = skipbl(); | |
1552 | if (cmd == '\n') { | |
1553 | unsigned long sp, toc; | |
1554 | asm("mr %0,1" : "=r" (sp) :); | |
1555 | asm("mr %0,2" : "=r" (toc) :); | |
1556 | ||
f78541dc PM |
1557 | printf("msr = "REG" sprg0= "REG"\n", |
1558 | mfmsr(), mfspr(SPRN_SPRG0)); | |
1559 | printf("pvr = "REG" sprg1= "REG"\n", | |
1560 | mfspr(SPRN_PVR), mfspr(SPRN_SPRG1)); | |
1561 | printf("dec = "REG" sprg2= "REG"\n", | |
1562 | mfspr(SPRN_DEC), mfspr(SPRN_SPRG2)); | |
1563 | printf("sp = "REG" sprg3= "REG"\n", sp, mfspr(SPRN_SPRG3)); | |
1564 | printf("toc = "REG" dar = "REG"\n", toc, mfspr(SPRN_DAR)); | |
1da177e4 LT |
1565 | #ifdef CONFIG_PPC_ISERIES |
1566 | // Dump out relevant Paca data areas. | |
1567 | printf("Paca: \n"); | |
1568 | ptrPaca = get_paca(); | |
1569 | ||
1570 | printf(" Local Processor Control Area (LpPaca): \n"); | |
1571 | ptrLpPaca = ptrPaca->lppaca_ptr; | |
1572 | printf(" Saved Srr0=%.16lx Saved Srr1=%.16lx \n", | |
1573 | ptrLpPaca->saved_srr0, ptrLpPaca->saved_srr1); | |
1574 | printf(" Saved Gpr3=%.16lx Saved Gpr4=%.16lx \n", | |
1575 | ptrLpPaca->saved_gpr3, ptrLpPaca->saved_gpr4); | |
1576 | printf(" Saved Gpr5=%.16lx \n", ptrLpPaca->saved_gpr5); | |
1577 | ||
1578 | printf(" Local Processor Register Save Area (LpRegSave): \n"); | |
1579 | ptrLpRegSave = ptrPaca->reg_save_ptr; | |
1580 | printf(" Saved Sprg0=%.16lx Saved Sprg1=%.16lx \n", | |
1581 | ptrLpRegSave->xSPRG0, ptrLpRegSave->xSPRG0); | |
1582 | printf(" Saved Sprg2=%.16lx Saved Sprg3=%.16lx \n", | |
1583 | ptrLpRegSave->xSPRG2, ptrLpRegSave->xSPRG3); | |
1584 | printf(" Saved Msr =%.16lx Saved Nia =%.16lx \n", | |
1585 | ptrLpRegSave->xMSR, ptrLpRegSave->xNIA); | |
1586 | #endif | |
1587 | ||
1588 | return; | |
1589 | } | |
1590 | ||
1591 | scanhex(®no); | |
1592 | switch (cmd) { | |
1593 | case 'w': | |
1594 | val = read_spr(regno); | |
1595 | scanhex(&val); | |
1596 | write_spr(regno, val); | |
1597 | /* fall through */ | |
1598 | case 'r': | |
1599 | printf("spr %lx = %lx\n", regno, read_spr(regno)); | |
1600 | break; | |
1da177e4 LT |
1601 | } |
1602 | scannl(); | |
1603 | } | |
1604 | ||
1605 | /* | |
1606 | * Stuff for reading and writing memory safely | |
1607 | */ | |
1608 | int | |
1609 | mread(unsigned long adrs, void *buf, int size) | |
1610 | { | |
1611 | volatile int n; | |
1612 | char *p, *q; | |
1613 | ||
1614 | n = 0; | |
1615 | if (setjmp(bus_error_jmp) == 0) { | |
1616 | catch_memory_errors = 1; | |
1617 | sync(); | |
1618 | p = (char *)adrs; | |
1619 | q = (char *)buf; | |
1620 | switch (size) { | |
1621 | case 2: | |
f78541dc | 1622 | *(u16 *)q = *(u16 *)p; |
1da177e4 LT |
1623 | break; |
1624 | case 4: | |
f78541dc | 1625 | *(u32 *)q = *(u32 *)p; |
1da177e4 LT |
1626 | break; |
1627 | case 8: | |
f78541dc | 1628 | *(u64 *)q = *(u64 *)p; |
1da177e4 LT |
1629 | break; |
1630 | default: | |
1631 | for( ; n < size; ++n) { | |
1632 | *q++ = *p++; | |
1633 | sync(); | |
1634 | } | |
1635 | } | |
1636 | sync(); | |
1637 | /* wait a little while to see if we get a machine check */ | |
1638 | __delay(200); | |
1639 | n = size; | |
1640 | } | |
1641 | catch_memory_errors = 0; | |
1642 | return n; | |
1643 | } | |
1644 | ||
1645 | int | |
1646 | mwrite(unsigned long adrs, void *buf, int size) | |
1647 | { | |
1648 | volatile int n; | |
1649 | char *p, *q; | |
1650 | ||
1651 | n = 0; | |
1652 | if (setjmp(bus_error_jmp) == 0) { | |
1653 | catch_memory_errors = 1; | |
1654 | sync(); | |
1655 | p = (char *) adrs; | |
1656 | q = (char *) buf; | |
1657 | switch (size) { | |
1658 | case 2: | |
f78541dc | 1659 | *(u16 *)p = *(u16 *)q; |
1da177e4 LT |
1660 | break; |
1661 | case 4: | |
f78541dc | 1662 | *(u32 *)p = *(u32 *)q; |
1da177e4 LT |
1663 | break; |
1664 | case 8: | |
f78541dc | 1665 | *(u64 *)p = *(u64 *)q; |
1da177e4 LT |
1666 | break; |
1667 | default: | |
1668 | for ( ; n < size; ++n) { | |
1669 | *p++ = *q++; | |
1670 | sync(); | |
1671 | } | |
1672 | } | |
1673 | sync(); | |
1674 | /* wait a little while to see if we get a machine check */ | |
1675 | __delay(200); | |
1676 | n = size; | |
1677 | } else { | |
1678 | printf("*** Error writing address %x\n", adrs + n); | |
1679 | } | |
1680 | catch_memory_errors = 0; | |
1681 | return n; | |
1682 | } | |
1683 | ||
1684 | static int fault_type; | |
f78541dc | 1685 | static int fault_except; |
1da177e4 LT |
1686 | static char *fault_chars[] = { "--", "**", "##" }; |
1687 | ||
f78541dc | 1688 | static int handle_fault(struct pt_regs *regs) |
1da177e4 | 1689 | { |
f78541dc | 1690 | fault_except = TRAP(regs); |
1da177e4 LT |
1691 | switch (TRAP(regs)) { |
1692 | case 0x200: | |
1693 | fault_type = 0; | |
1694 | break; | |
1695 | case 0x300: | |
1696 | case 0x380: | |
1697 | fault_type = 1; | |
1698 | break; | |
1699 | default: | |
1700 | fault_type = 2; | |
1701 | } | |
1702 | ||
1703 | longjmp(bus_error_jmp, 1); | |
1704 | ||
1705 | return 0; | |
1706 | } | |
1707 | ||
1708 | #define SWAP(a, b, t) ((t) = (a), (a) = (b), (b) = (t)) | |
1709 | ||
1710 | void | |
1711 | byterev(unsigned char *val, int size) | |
1712 | { | |
1713 | int t; | |
1714 | ||
1715 | switch (size) { | |
1716 | case 2: | |
1717 | SWAP(val[0], val[1], t); | |
1718 | break; | |
1719 | case 4: | |
1720 | SWAP(val[0], val[3], t); | |
1721 | SWAP(val[1], val[2], t); | |
1722 | break; | |
1723 | case 8: /* is there really any use for this? */ | |
1724 | SWAP(val[0], val[7], t); | |
1725 | SWAP(val[1], val[6], t); | |
1726 | SWAP(val[2], val[5], t); | |
1727 | SWAP(val[3], val[4], t); | |
1728 | break; | |
1729 | } | |
1730 | } | |
1731 | ||
1732 | static int brev; | |
1733 | static int mnoread; | |
1734 | ||
1735 | static char *memex_help_string = | |
1736 | "Memory examine command usage:\n" | |
1737 | "m [addr] [flags] examine/change memory\n" | |
1738 | " addr is optional. will start where left off.\n" | |
1739 | " flags may include chars from this set:\n" | |
1740 | " b modify by bytes (default)\n" | |
1741 | " w modify by words (2 byte)\n" | |
1742 | " l modify by longs (4 byte)\n" | |
1743 | " d modify by doubleword (8 byte)\n" | |
1744 | " r toggle reverse byte order mode\n" | |
1745 | " n do not read memory (for i/o spaces)\n" | |
1746 | " . ok to read (default)\n" | |
1747 | "NOTE: flags are saved as defaults\n" | |
1748 | ""; | |
1749 | ||
1750 | static char *memex_subcmd_help_string = | |
1751 | "Memory examine subcommands:\n" | |
1752 | " hexval write this val to current location\n" | |
1753 | " 'string' write chars from string to this location\n" | |
1754 | " ' increment address\n" | |
1755 | " ^ decrement address\n" | |
1756 | " / increment addr by 0x10. //=0x100, ///=0x1000, etc\n" | |
1757 | " \\ decrement addr by 0x10. \\\\=0x100, \\\\\\=0x1000, etc\n" | |
1758 | " ` clear no-read flag\n" | |
1759 | " ; stay at this addr\n" | |
1760 | " v change to byte mode\n" | |
1761 | " w change to word (2 byte) mode\n" | |
1762 | " l change to long (4 byte) mode\n" | |
1763 | " u change to doubleword (8 byte) mode\n" | |
1764 | " m addr change current addr\n" | |
1765 | " n toggle no-read flag\n" | |
1766 | " r toggle byte reverse flag\n" | |
1767 | " < count back up count bytes\n" | |
1768 | " > count skip forward count bytes\n" | |
1769 | " x exit this mode\n" | |
1770 | ""; | |
1771 | ||
1772 | void | |
1773 | memex(void) | |
1774 | { | |
1775 | int cmd, inc, i, nslash; | |
1776 | unsigned long n; | |
1777 | unsigned char val[16]; | |
1778 | ||
1779 | scanhex((void *)&adrs); | |
1780 | cmd = skipbl(); | |
1781 | if (cmd == '?') { | |
1782 | printf(memex_help_string); | |
1783 | return; | |
1784 | } else { | |
1785 | termch = cmd; | |
1786 | } | |
1787 | last_cmd = "m\n"; | |
1788 | while ((cmd = skipbl()) != '\n') { | |
1789 | switch( cmd ){ | |
1790 | case 'b': size = 1; break; | |
1791 | case 'w': size = 2; break; | |
1792 | case 'l': size = 4; break; | |
1793 | case 'd': size = 8; break; | |
1794 | case 'r': brev = !brev; break; | |
1795 | case 'n': mnoread = 1; break; | |
1796 | case '.': mnoread = 0; break; | |
1797 | } | |
1798 | } | |
1799 | if( size <= 0 ) | |
1800 | size = 1; | |
1801 | else if( size > 8 ) | |
1802 | size = 8; | |
1803 | for(;;){ | |
1804 | if (!mnoread) | |
1805 | n = mread(adrs, val, size); | |
e1449ed9 | 1806 | printf(REG"%c", adrs, brev? 'r': ' '); |
1da177e4 LT |
1807 | if (!mnoread) { |
1808 | if (brev) | |
1809 | byterev(val, size); | |
1810 | putchar(' '); | |
1811 | for (i = 0; i < n; ++i) | |
1812 | printf("%.2x", val[i]); | |
1813 | for (; i < size; ++i) | |
1814 | printf("%s", fault_chars[fault_type]); | |
1815 | } | |
1816 | putchar(' '); | |
1817 | inc = size; | |
1818 | nslash = 0; | |
1819 | for(;;){ | |
1820 | if( scanhex(&n) ){ | |
1821 | for (i = 0; i < size; ++i) | |
1822 | val[i] = n >> (i * 8); | |
1823 | if (!brev) | |
1824 | byterev(val, size); | |
1825 | mwrite(adrs, val, size); | |
1826 | inc = size; | |
1827 | } | |
1828 | cmd = skipbl(); | |
1829 | if (cmd == '\n') | |
1830 | break; | |
1831 | inc = 0; | |
1832 | switch (cmd) { | |
1833 | case '\'': | |
1834 | for(;;){ | |
1835 | n = inchar(); | |
1836 | if( n == '\\' ) | |
1837 | n = bsesc(); | |
1838 | else if( n == '\'' ) | |
1839 | break; | |
1840 | for (i = 0; i < size; ++i) | |
1841 | val[i] = n >> (i * 8); | |
1842 | if (!brev) | |
1843 | byterev(val, size); | |
1844 | mwrite(adrs, val, size); | |
1845 | adrs += size; | |
1846 | } | |
1847 | adrs -= size; | |
1848 | inc = size; | |
1849 | break; | |
1850 | case ',': | |
1851 | adrs += size; | |
1852 | break; | |
1853 | case '.': | |
1854 | mnoread = 0; | |
1855 | break; | |
1856 | case ';': | |
1857 | break; | |
1858 | case 'x': | |
1859 | case EOF: | |
1860 | scannl(); | |
1861 | return; | |
1862 | case 'b': | |
1863 | case 'v': | |
1864 | size = 1; | |
1865 | break; | |
1866 | case 'w': | |
1867 | size = 2; | |
1868 | break; | |
1869 | case 'l': | |
1870 | size = 4; | |
1871 | break; | |
1872 | case 'u': | |
1873 | size = 8; | |
1874 | break; | |
1875 | case '^': | |
1876 | adrs -= size; | |
1877 | break; | |
1878 | break; | |
1879 | case '/': | |
1880 | if (nslash > 0) | |
1881 | adrs -= 1 << nslash; | |
1882 | else | |
1883 | nslash = 0; | |
1884 | nslash += 4; | |
1885 | adrs += 1 << nslash; | |
1886 | break; | |
1887 | case '\\': | |
1888 | if (nslash < 0) | |
1889 | adrs += 1 << -nslash; | |
1890 | else | |
1891 | nslash = 0; | |
1892 | nslash -= 4; | |
1893 | adrs -= 1 << -nslash; | |
1894 | break; | |
1895 | case 'm': | |
1896 | scanhex((void *)&adrs); | |
1897 | break; | |
1898 | case 'n': | |
1899 | mnoread = 1; | |
1900 | break; | |
1901 | case 'r': | |
1902 | brev = !brev; | |
1903 | break; | |
1904 | case '<': | |
1905 | n = size; | |
1906 | scanhex(&n); | |
1907 | adrs -= n; | |
1908 | break; | |
1909 | case '>': | |
1910 | n = size; | |
1911 | scanhex(&n); | |
1912 | adrs += n; | |
1913 | break; | |
1914 | case '?': | |
1915 | printf(memex_subcmd_help_string); | |
1916 | break; | |
1917 | } | |
1918 | } | |
1919 | adrs += inc; | |
1920 | } | |
1921 | } | |
1922 | ||
1923 | int | |
1924 | bsesc(void) | |
1925 | { | |
1926 | int c; | |
1927 | ||
1928 | c = inchar(); | |
1929 | switch( c ){ | |
1930 | case 'n': c = '\n'; break; | |
1931 | case 'r': c = '\r'; break; | |
1932 | case 'b': c = '\b'; break; | |
1933 | case 't': c = '\t'; break; | |
1934 | } | |
1935 | return c; | |
1936 | } | |
1937 | ||
7e5b5938 OH |
1938 | static void xmon_rawdump (unsigned long adrs, long ndump) |
1939 | { | |
1940 | long n, m, r, nr; | |
1941 | unsigned char temp[16]; | |
1942 | ||
1943 | for (n = ndump; n > 0;) { | |
1944 | r = n < 16? n: 16; | |
1945 | nr = mread(adrs, temp, r); | |
1946 | adrs += nr; | |
1947 | for (m = 0; m < r; ++m) { | |
1948 | if (m < nr) | |
1949 | printf("%.2x", temp[m]); | |
1950 | else | |
1951 | printf("%s", fault_chars[fault_type]); | |
1952 | } | |
1953 | n -= r; | |
1954 | if (nr < r) | |
1955 | break; | |
1956 | } | |
1957 | printf("\n"); | |
1958 | } | |
1959 | ||
1da177e4 LT |
1960 | #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ |
1961 | || ('a' <= (c) && (c) <= 'f') \ | |
1962 | || ('A' <= (c) && (c) <= 'F')) | |
1963 | void | |
1964 | dump(void) | |
1965 | { | |
1966 | int c; | |
1967 | ||
1968 | c = inchar(); | |
1969 | if ((isxdigit(c) && c != 'f' && c != 'd') || c == '\n') | |
1970 | termch = c; | |
1971 | scanhex((void *)&adrs); | |
1972 | if (termch != '\n') | |
1973 | termch = 0; | |
1974 | if (c == 'i') { | |
1975 | scanhex(&nidump); | |
1976 | if (nidump == 0) | |
1977 | nidump = 16; | |
1978 | else if (nidump > MAX_DUMP) | |
1979 | nidump = MAX_DUMP; | |
1980 | adrs += ppc_inst_dump(adrs, nidump, 1); | |
1981 | last_cmd = "di\n"; | |
7e5b5938 OH |
1982 | } else if (c == 'r') { |
1983 | scanhex(&ndump); | |
1984 | if (ndump == 0) | |
1985 | ndump = 64; | |
1986 | xmon_rawdump(adrs, ndump); | |
1987 | adrs += ndump; | |
1988 | last_cmd = "dr\n"; | |
1da177e4 LT |
1989 | } else { |
1990 | scanhex(&ndump); | |
1991 | if (ndump == 0) | |
1992 | ndump = 64; | |
1993 | else if (ndump > MAX_DUMP) | |
1994 | ndump = MAX_DUMP; | |
1995 | prdump(adrs, ndump); | |
1996 | adrs += ndump; | |
1997 | last_cmd = "d\n"; | |
1998 | } | |
1999 | } | |
2000 | ||
2001 | void | |
2002 | prdump(unsigned long adrs, long ndump) | |
2003 | { | |
2004 | long n, m, c, r, nr; | |
2005 | unsigned char temp[16]; | |
2006 | ||
2007 | for (n = ndump; n > 0;) { | |
f78541dc | 2008 | printf(REG, adrs); |
1da177e4 LT |
2009 | putchar(' '); |
2010 | r = n < 16? n: 16; | |
2011 | nr = mread(adrs, temp, r); | |
2012 | adrs += nr; | |
2013 | for (m = 0; m < r; ++m) { | |
e1449ed9 PM |
2014 | if ((m & (sizeof(long) - 1)) == 0 && m > 0) |
2015 | putchar(' '); | |
1da177e4 LT |
2016 | if (m < nr) |
2017 | printf("%.2x", temp[m]); | |
2018 | else | |
2019 | printf("%s", fault_chars[fault_type]); | |
2020 | } | |
e1449ed9 PM |
2021 | for (; m < 16; ++m) { |
2022 | if ((m & (sizeof(long) - 1)) == 0) | |
2023 | putchar(' '); | |
1da177e4 | 2024 | printf(" "); |
e1449ed9 | 2025 | } |
1da177e4 LT |
2026 | printf(" |"); |
2027 | for (m = 0; m < r; ++m) { | |
2028 | if (m < nr) { | |
2029 | c = temp[m]; | |
2030 | putchar(' ' <= c && c <= '~'? c: '.'); | |
2031 | } else | |
2032 | putchar(' '); | |
2033 | } | |
2034 | n -= r; | |
2035 | for (; m < 16; ++m) | |
2036 | putchar(' '); | |
2037 | printf("|\n"); | |
2038 | if (nr < r) | |
2039 | break; | |
2040 | } | |
2041 | } | |
2042 | ||
2043 | int | |
2044 | ppc_inst_dump(unsigned long adr, long count, int praddr) | |
2045 | { | |
2046 | int nr, dotted; | |
2047 | unsigned long first_adr; | |
2048 | unsigned long inst, last_inst = 0; | |
2049 | unsigned char val[4]; | |
2050 | ||
2051 | dotted = 0; | |
2052 | for (first_adr = adr; count > 0; --count, adr += 4) { | |
2053 | nr = mread(adr, val, 4); | |
2054 | if (nr == 0) { | |
2055 | if (praddr) { | |
2056 | const char *x = fault_chars[fault_type]; | |
f78541dc | 2057 | printf(REG" %s%s%s%s\n", adr, x, x, x, x); |
1da177e4 LT |
2058 | } |
2059 | break; | |
2060 | } | |
2061 | inst = GETWORD(val); | |
2062 | if (adr > first_adr && inst == last_inst) { | |
2063 | if (!dotted) { | |
2064 | printf(" ...\n"); | |
2065 | dotted = 1; | |
2066 | } | |
2067 | continue; | |
2068 | } | |
2069 | dotted = 0; | |
2070 | last_inst = inst; | |
2071 | if (praddr) | |
f78541dc | 2072 | printf(REG" %.8x", adr, inst); |
1da177e4 LT |
2073 | printf("\t"); |
2074 | print_insn_powerpc(inst, adr, 0); /* always returns 4 */ | |
2075 | printf("\n"); | |
2076 | } | |
2077 | return adr - first_adr; | |
2078 | } | |
2079 | ||
2080 | void | |
2081 | print_address(unsigned long addr) | |
2082 | { | |
2083 | xmon_print_symbol(addr, "\t# ", ""); | |
2084 | } | |
2085 | ||
2086 | ||
2087 | /* | |
2088 | * Memory operations - move, set, print differences | |
2089 | */ | |
2090 | static unsigned long mdest; /* destination address */ | |
2091 | static unsigned long msrc; /* source address */ | |
2092 | static unsigned long mval; /* byte value to set memory to */ | |
2093 | static unsigned long mcount; /* # bytes to affect */ | |
2094 | static unsigned long mdiffs; /* max # differences to print */ | |
2095 | ||
2096 | void | |
2097 | memops(int cmd) | |
2098 | { | |
2099 | scanhex((void *)&mdest); | |
2100 | if( termch != '\n' ) | |
2101 | termch = 0; | |
2102 | scanhex((void *)(cmd == 's'? &mval: &msrc)); | |
2103 | if( termch != '\n' ) | |
2104 | termch = 0; | |
2105 | scanhex((void *)&mcount); | |
2106 | switch( cmd ){ | |
2107 | case 'm': | |
2108 | memmove((void *)mdest, (void *)msrc, mcount); | |
2109 | break; | |
2110 | case 's': | |
2111 | memset((void *)mdest, mval, mcount); | |
2112 | break; | |
2113 | case 'd': | |
2114 | if( termch != '\n' ) | |
2115 | termch = 0; | |
2116 | scanhex((void *)&mdiffs); | |
2117 | memdiffs((unsigned char *)mdest, (unsigned char *)msrc, mcount, mdiffs); | |
2118 | break; | |
2119 | } | |
2120 | } | |
2121 | ||
2122 | void | |
2123 | memdiffs(unsigned char *p1, unsigned char *p2, unsigned nb, unsigned maxpr) | |
2124 | { | |
2125 | unsigned n, prt; | |
2126 | ||
2127 | prt = 0; | |
2128 | for( n = nb; n > 0; --n ) | |
2129 | if( *p1++ != *p2++ ) | |
2130 | if( ++prt <= maxpr ) | |
2131 | printf("%.16x %.2x # %.16x %.2x\n", p1 - 1, | |
2132 | p1[-1], p2 - 1, p2[-1]); | |
2133 | if( prt > maxpr ) | |
2134 | printf("Total of %d differences\n", prt); | |
2135 | } | |
2136 | ||
2137 | static unsigned mend; | |
2138 | static unsigned mask; | |
2139 | ||
2140 | void | |
2141 | memlocate(void) | |
2142 | { | |
2143 | unsigned a, n; | |
2144 | unsigned char val[4]; | |
2145 | ||
2146 | last_cmd = "ml"; | |
2147 | scanhex((void *)&mdest); | |
2148 | if (termch != '\n') { | |
2149 | termch = 0; | |
2150 | scanhex((void *)&mend); | |
2151 | if (termch != '\n') { | |
2152 | termch = 0; | |
2153 | scanhex((void *)&mval); | |
2154 | mask = ~0; | |
2155 | if (termch != '\n') termch = 0; | |
2156 | scanhex((void *)&mask); | |
2157 | } | |
2158 | } | |
2159 | n = 0; | |
2160 | for (a = mdest; a < mend; a += 4) { | |
2161 | if (mread(a, val, 4) == 4 | |
2162 | && ((GETWORD(val) ^ mval) & mask) == 0) { | |
2163 | printf("%.16x: %.16x\n", a, GETWORD(val)); | |
2164 | if (++n >= 10) | |
2165 | break; | |
2166 | } | |
2167 | } | |
2168 | } | |
2169 | ||
2170 | static unsigned long mskip = 0x1000; | |
2171 | static unsigned long mlim = 0xffffffff; | |
2172 | ||
2173 | void | |
2174 | memzcan(void) | |
2175 | { | |
2176 | unsigned char v; | |
2177 | unsigned a; | |
2178 | int ok, ook; | |
2179 | ||
2180 | scanhex(&mdest); | |
2181 | if (termch != '\n') termch = 0; | |
2182 | scanhex(&mskip); | |
2183 | if (termch != '\n') termch = 0; | |
2184 | scanhex(&mlim); | |
2185 | ook = 0; | |
2186 | for (a = mdest; a < mlim; a += mskip) { | |
2187 | ok = mread(a, &v, 1); | |
2188 | if (ok && !ook) { | |
2189 | printf("%.8x .. ", a); | |
1da177e4 LT |
2190 | } else if (!ok && ook) |
2191 | printf("%.8x\n", a - mskip); | |
2192 | ook = ok; | |
2193 | if (a + mskip < a) | |
2194 | break; | |
2195 | } | |
2196 | if (ook) | |
2197 | printf("%.8x\n", a - mskip); | |
2198 | } | |
2199 | ||
f78541dc PM |
2200 | void proccall(void) |
2201 | { | |
2202 | unsigned long args[8]; | |
2203 | unsigned long ret; | |
2204 | int i; | |
2205 | typedef unsigned long (*callfunc_t)(unsigned long, unsigned long, | |
2206 | unsigned long, unsigned long, unsigned long, | |
2207 | unsigned long, unsigned long, unsigned long); | |
2208 | callfunc_t func; | |
2209 | ||
2210 | if (!scanhex(&adrs)) | |
2211 | return; | |
2212 | if (termch != '\n') | |
2213 | termch = 0; | |
2214 | for (i = 0; i < 8; ++i) | |
2215 | args[i] = 0; | |
2216 | for (i = 0; i < 8; ++i) { | |
2217 | if (!scanhex(&args[i]) || termch == '\n') | |
2218 | break; | |
2219 | termch = 0; | |
2220 | } | |
2221 | func = (callfunc_t) adrs; | |
2222 | ret = 0; | |
2223 | if (setjmp(bus_error_jmp) == 0) { | |
2224 | catch_memory_errors = 1; | |
2225 | sync(); | |
2226 | ret = func(args[0], args[1], args[2], args[3], | |
2227 | args[4], args[5], args[6], args[7]); | |
2228 | sync(); | |
2229 | printf("return value is %x\n", ret); | |
2230 | } else { | |
2231 | printf("*** %x exception occurred\n", fault_except); | |
2232 | } | |
2233 | catch_memory_errors = 0; | |
2234 | } | |
2235 | ||
1da177e4 LT |
2236 | /* Input scanning routines */ |
2237 | int | |
2238 | skipbl(void) | |
2239 | { | |
2240 | int c; | |
2241 | ||
2242 | if( termch != 0 ){ | |
2243 | c = termch; | |
2244 | termch = 0; | |
2245 | } else | |
2246 | c = inchar(); | |
2247 | while( c == ' ' || c == '\t' ) | |
2248 | c = inchar(); | |
2249 | return c; | |
2250 | } | |
2251 | ||
2252 | #define N_PTREGS 44 | |
2253 | static char *regnames[N_PTREGS] = { | |
2254 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", | |
2255 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", | |
2256 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", | |
2257 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", | |
f78541dc PM |
2258 | "pc", "msr", "or3", "ctr", "lr", "xer", "ccr", |
2259 | #ifdef CONFIG_PPC64 | |
2260 | "softe", | |
2261 | #else | |
2262 | "mq", | |
2263 | #endif | |
1da177e4 LT |
2264 | "trap", "dar", "dsisr", "res" |
2265 | }; | |
2266 | ||
2267 | int | |
2268 | scanhex(unsigned long *vp) | |
2269 | { | |
2270 | int c, d; | |
2271 | unsigned long v; | |
2272 | ||
2273 | c = skipbl(); | |
2274 | if (c == '%') { | |
2275 | /* parse register name */ | |
2276 | char regname[8]; | |
2277 | int i; | |
2278 | ||
2279 | for (i = 0; i < sizeof(regname) - 1; ++i) { | |
2280 | c = inchar(); | |
2281 | if (!isalnum(c)) { | |
2282 | termch = c; | |
2283 | break; | |
2284 | } | |
2285 | regname[i] = c; | |
2286 | } | |
2287 | regname[i] = 0; | |
2288 | for (i = 0; i < N_PTREGS; ++i) { | |
2289 | if (strcmp(regnames[i], regname) == 0) { | |
2290 | if (xmon_regs == NULL) { | |
2291 | printf("regs not available\n"); | |
2292 | return 0; | |
2293 | } | |
2294 | *vp = ((unsigned long *)xmon_regs)[i]; | |
2295 | return 1; | |
2296 | } | |
2297 | } | |
2298 | printf("invalid register name '%%%s'\n", regname); | |
2299 | return 0; | |
2300 | } | |
2301 | ||
2302 | /* skip leading "0x" if any */ | |
2303 | ||
2304 | if (c == '0') { | |
2305 | c = inchar(); | |
2306 | if (c == 'x') { | |
2307 | c = inchar(); | |
2308 | } else { | |
2309 | d = hexdigit(c); | |
2310 | if (d == EOF) { | |
2311 | termch = c; | |
2312 | *vp = 0; | |
2313 | return 1; | |
2314 | } | |
2315 | } | |
2316 | } else if (c == '$') { | |
2317 | int i; | |
2318 | for (i=0; i<63; i++) { | |
2319 | c = inchar(); | |
2320 | if (isspace(c)) { | |
2321 | termch = c; | |
2322 | break; | |
2323 | } | |
2324 | tmpstr[i] = c; | |
2325 | } | |
2326 | tmpstr[i++] = 0; | |
6879dc13 BH |
2327 | *vp = 0; |
2328 | if (setjmp(bus_error_jmp) == 0) { | |
2329 | catch_memory_errors = 1; | |
2330 | sync(); | |
2331 | *vp = kallsyms_lookup_name(tmpstr); | |
2332 | sync(); | |
2333 | } | |
2334 | catch_memory_errors = 0; | |
1da177e4 LT |
2335 | if (!(*vp)) { |
2336 | printf("unknown symbol '%s'\n", tmpstr); | |
2337 | return 0; | |
2338 | } | |
2339 | return 1; | |
2340 | } | |
2341 | ||
2342 | d = hexdigit(c); | |
2343 | if (d == EOF) { | |
2344 | termch = c; | |
2345 | return 0; | |
2346 | } | |
2347 | v = 0; | |
2348 | do { | |
2349 | v = (v << 4) + d; | |
2350 | c = inchar(); | |
2351 | d = hexdigit(c); | |
2352 | } while (d != EOF); | |
2353 | termch = c; | |
2354 | *vp = v; | |
2355 | return 1; | |
2356 | } | |
2357 | ||
2358 | void | |
2359 | scannl(void) | |
2360 | { | |
2361 | int c; | |
2362 | ||
2363 | c = termch; | |
2364 | termch = 0; | |
2365 | while( c != '\n' ) | |
2366 | c = inchar(); | |
2367 | } | |
2368 | ||
f78541dc | 2369 | int hexdigit(int c) |
1da177e4 LT |
2370 | { |
2371 | if( '0' <= c && c <= '9' ) | |
2372 | return c - '0'; | |
2373 | if( 'A' <= c && c <= 'F' ) | |
2374 | return c - ('A' - 10); | |
2375 | if( 'a' <= c && c <= 'f' ) | |
2376 | return c - ('a' - 10); | |
2377 | return EOF; | |
2378 | } | |
2379 | ||
2380 | void | |
2381 | getstring(char *s, int size) | |
2382 | { | |
2383 | int c; | |
2384 | ||
2385 | c = skipbl(); | |
2386 | do { | |
2387 | if( size > 1 ){ | |
2388 | *s++ = c; | |
2389 | --size; | |
2390 | } | |
2391 | c = inchar(); | |
2392 | } while( c != ' ' && c != '\t' && c != '\n' ); | |
2393 | termch = c; | |
2394 | *s = 0; | |
2395 | } | |
2396 | ||
2397 | static char line[256]; | |
2398 | static char *lineptr; | |
2399 | ||
2400 | void | |
2401 | flush_input(void) | |
2402 | { | |
2403 | lineptr = NULL; | |
2404 | } | |
2405 | ||
2406 | int | |
2407 | inchar(void) | |
2408 | { | |
2409 | if (lineptr == NULL || *lineptr == 0) { | |
fca5dcd4 | 2410 | if (xmon_gets(line, sizeof(line)) == NULL) { |
1da177e4 LT |
2411 | lineptr = NULL; |
2412 | return EOF; | |
2413 | } | |
2414 | lineptr = line; | |
2415 | } | |
2416 | return *lineptr++; | |
2417 | } | |
2418 | ||
2419 | void | |
2420 | take_input(char *str) | |
2421 | { | |
2422 | lineptr = str; | |
2423 | } | |
2424 | ||
2425 | ||
2426 | static void | |
2427 | symbol_lookup(void) | |
2428 | { | |
2429 | int type = inchar(); | |
2430 | unsigned long addr; | |
2431 | static char tmp[64]; | |
2432 | ||
2433 | switch (type) { | |
2434 | case 'a': | |
2435 | if (scanhex(&addr)) | |
2436 | xmon_print_symbol(addr, ": ", "\n"); | |
2437 | termch = 0; | |
2438 | break; | |
2439 | case 's': | |
2440 | getstring(tmp, 64); | |
2441 | if (setjmp(bus_error_jmp) == 0) { | |
2442 | catch_memory_errors = 1; | |
2443 | sync(); | |
2444 | addr = kallsyms_lookup_name(tmp); | |
2445 | if (addr) | |
2446 | printf("%s: %lx\n", tmp, addr); | |
2447 | else | |
2448 | printf("Symbol '%s' not found.\n", tmp); | |
2449 | sync(); | |
2450 | } | |
2451 | catch_memory_errors = 0; | |
2452 | termch = 0; | |
2453 | break; | |
2454 | } | |
2455 | } | |
2456 | ||
2457 | ||
2458 | /* Print an address in numeric and symbolic form (if possible) */ | |
2459 | static void xmon_print_symbol(unsigned long address, const char *mid, | |
2460 | const char *after) | |
2461 | { | |
2462 | char *modname; | |
2463 | const char *name = NULL; | |
2464 | unsigned long offset, size; | |
2465 | ||
f78541dc | 2466 | printf(REG, address); |
1da177e4 LT |
2467 | if (setjmp(bus_error_jmp) == 0) { |
2468 | catch_memory_errors = 1; | |
2469 | sync(); | |
2470 | name = kallsyms_lookup(address, &size, &offset, &modname, | |
2471 | tmpstr); | |
2472 | sync(); | |
2473 | /* wait a little while to see if we get a machine check */ | |
2474 | __delay(200); | |
2475 | } | |
2476 | ||
2477 | catch_memory_errors = 0; | |
2478 | ||
2479 | if (name) { | |
2480 | printf("%s%s+%#lx/%#lx", mid, name, offset, size); | |
2481 | if (modname) | |
2482 | printf(" [%s]", modname); | |
2483 | } | |
2484 | printf("%s", after); | |
2485 | } | |
2486 | ||
f78541dc | 2487 | #ifdef CONFIG_PPC64 |
1da177e4 LT |
2488 | static void dump_slb(void) |
2489 | { | |
2490 | int i; | |
2491 | unsigned long tmp; | |
2492 | ||
2493 | printf("SLB contents of cpu %x\n", smp_processor_id()); | |
2494 | ||
2495 | for (i = 0; i < SLB_NUM_ENTRIES; i++) { | |
2496 | asm volatile("slbmfee %0,%1" : "=r" (tmp) : "r" (i)); | |
2497 | printf("%02d %016lx ", i, tmp); | |
2498 | ||
2499 | asm volatile("slbmfev %0,%1" : "=r" (tmp) : "r" (i)); | |
2500 | printf("%016lx\n", tmp); | |
2501 | } | |
2502 | } | |
2503 | ||
2504 | static void dump_stab(void) | |
2505 | { | |
2506 | int i; | |
2507 | unsigned long *tmp = (unsigned long *)get_paca()->stab_addr; | |
2508 | ||
2509 | printf("Segment table contents of cpu %x\n", smp_processor_id()); | |
2510 | ||
2511 | for (i = 0; i < PAGE_SIZE/16; i++) { | |
2512 | unsigned long a, b; | |
2513 | ||
2514 | a = *tmp++; | |
2515 | b = *tmp++; | |
2516 | ||
2517 | if (a || b) { | |
2518 | printf("%03d %016lx ", i, a); | |
2519 | printf("%016lx\n", b); | |
2520 | } | |
2521 | } | |
2522 | } | |
2523 | ||
f78541dc PM |
2524 | void dump_segments(void) |
2525 | { | |
2526 | if (cpu_has_feature(CPU_FTR_SLB)) | |
2527 | dump_slb(); | |
2528 | else | |
2529 | dump_stab(); | |
2530 | } | |
2531 | #endif | |
2532 | ||
2533 | #ifdef CONFIG_PPC_STD_MMU_32 | |
2534 | void dump_segments(void) | |
2535 | { | |
2536 | int i; | |
2537 | ||
2538 | printf("sr0-15 ="); | |
2539 | for (i = 0; i < 16; ++i) | |
2540 | printf(" %x", mfsrin(i)); | |
2541 | printf("\n"); | |
2542 | } | |
2543 | #endif | |
2544 | ||
b13cfd17 OH |
2545 | void xmon_init(int enable) |
2546 | { | |
2547 | if (enable) { | |
2548 | __debugger = xmon; | |
2549 | __debugger_ipi = xmon_ipi; | |
2550 | __debugger_bpt = xmon_bpt; | |
2551 | __debugger_sstep = xmon_sstep; | |
2552 | __debugger_iabr_match = xmon_iabr_match; | |
2553 | __debugger_dabr_match = xmon_dabr_match; | |
2554 | __debugger_fault_handler = xmon_fault_handler; | |
2555 | } else { | |
2556 | __debugger = NULL; | |
2557 | __debugger_ipi = NULL; | |
2558 | __debugger_bpt = NULL; | |
2559 | __debugger_sstep = NULL; | |
2560 | __debugger_iabr_match = NULL; | |
2561 | __debugger_dabr_match = NULL; | |
2562 | __debugger_fault_handler = NULL; | |
2563 | } | |
fca5dcd4 | 2564 | xmon_map_scc(); |
1da177e4 | 2565 | } |
fca5dcd4 PM |
2566 | |
2567 | #ifdef CONFIG_MAGIC_SYSRQ | |
2568 | static void sysrq_handle_xmon(int key, struct pt_regs *pt_regs, | |
2569 | struct tty_struct *tty) | |
2570 | { | |
2571 | /* ensure xmon is enabled */ | |
2572 | xmon_init(1); | |
2573 | debugger(pt_regs); | |
2574 | } | |
2575 | ||
2576 | static struct sysrq_key_op sysrq_xmon_op = | |
2577 | { | |
2578 | .handler = sysrq_handle_xmon, | |
2579 | .help_msg = "Xmon", | |
2580 | .action_msg = "Entering xmon", | |
2581 | }; | |
2582 | ||
2583 | static int __init setup_xmon_sysrq(void) | |
2584 | { | |
2585 | register_sysrq_key('x', &sysrq_xmon_op); | |
2586 | return 0; | |
2587 | } | |
2588 | __initcall(setup_xmon_sysrq); | |
2589 | #endif /* CONFIG_MAGIC_SYSRQ */ |