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. |
47679283 ME |
5 | * Copyright (C) 2001 PPC64 Team, IBM Corp |
6 | * Copyrignt (C) 2006 Michael Ellerman, IBM Corp | |
1da177e4 LT |
7 | * |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * as published by the Free Software Foundation; either version | |
11 | * 2 of the License, or (at your option) any later version. | |
12 | */ | |
1da177e4 LT |
13 | #include <linux/errno.h> |
14 | #include <linux/sched.h> | |
15 | #include <linux/smp.h> | |
16 | #include <linux/mm.h> | |
17 | #include <linux/reboot.h> | |
18 | #include <linux/delay.h> | |
19 | #include <linux/kallsyms.h> | |
20 | #include <linux/cpumask.h> | |
f78541dc | 21 | #include <linux/module.h> |
fca5dcd4 | 22 | #include <linux/sysrq.h> |
4694ca02 | 23 | #include <linux/interrupt.h> |
1da177e4 LT |
24 | |
25 | #include <asm/ptrace.h> | |
26 | #include <asm/string.h> | |
27 | #include <asm/prom.h> | |
28 | #include <asm/machdep.h> | |
f78541dc | 29 | #include <asm/xmon.h> |
1da177e4 LT |
30 | #include <asm/processor.h> |
31 | #include <asm/pgtable.h> | |
32 | #include <asm/mmu.h> | |
33 | #include <asm/mmu_context.h> | |
1da177e4 LT |
34 | #include <asm/cputable.h> |
35 | #include <asm/rtas.h> | |
36 | #include <asm/sstep.h> | |
37 | #include <asm/bug.h> | |
f78541dc PM |
38 | |
39 | #ifdef CONFIG_PPC64 | |
1da177e4 | 40 | #include <asm/hvcall.h> |
f78541dc PM |
41 | #include <asm/paca.h> |
42 | #endif | |
1da177e4 LT |
43 | |
44 | #include "nonstdio.h" | |
1da177e4 LT |
45 | |
46 | #define scanhex xmon_scanhex | |
47 | #define skipbl xmon_skipbl | |
48 | ||
49 | #ifdef CONFIG_SMP | |
50 | cpumask_t cpus_in_xmon = CPU_MASK_NONE; | |
51 | static unsigned long xmon_taken = 1; | |
52 | static int xmon_owner; | |
53 | static int xmon_gate; | |
54 | #endif /* CONFIG_SMP */ | |
55 | ||
56 | static unsigned long in_xmon = 0; | |
57 | ||
58 | static unsigned long adrs; | |
59 | static int size = 1; | |
60 | #define MAX_DUMP (128 * 1024) | |
61 | static unsigned long ndump = 64; | |
62 | static unsigned long nidump = 16; | |
63 | static unsigned long ncsum = 4096; | |
64 | static int termch; | |
65 | static char tmpstr[128]; | |
66 | ||
f78541dc | 67 | #define JMP_BUF_LEN 23 |
1da177e4 LT |
68 | static long bus_error_jmp[JMP_BUF_LEN]; |
69 | static int catch_memory_errors; | |
70 | static long *xmon_fault_jmp[NR_CPUS]; | |
71 | #define setjmp xmon_setjmp | |
72 | #define longjmp xmon_longjmp | |
73 | ||
74 | /* Breakpoint stuff */ | |
75 | struct bpt { | |
76 | unsigned long address; | |
77 | unsigned int instr[2]; | |
78 | atomic_t ref_count; | |
79 | int enabled; | |
80 | unsigned long pad; | |
81 | }; | |
82 | ||
83 | /* Bits in bpt.enabled */ | |
84 | #define BP_IABR_TE 1 /* IABR translation enabled */ | |
85 | #define BP_IABR 2 | |
86 | #define BP_TRAP 8 | |
87 | #define BP_DABR 0x10 | |
88 | ||
89 | #define NBPTS 256 | |
90 | static struct bpt bpts[NBPTS]; | |
91 | static struct bpt dabr; | |
92 | static struct bpt *iabr; | |
93 | static unsigned bpinstr = 0x7fe00008; /* trap */ | |
94 | ||
95 | #define BP_NUM(bp) ((bp) - bpts + 1) | |
96 | ||
97 | /* Prototypes */ | |
98 | static int cmds(struct pt_regs *); | |
99 | static int mread(unsigned long, void *, int); | |
100 | static int mwrite(unsigned long, void *, int); | |
101 | static int handle_fault(struct pt_regs *); | |
102 | static void byterev(unsigned char *, int); | |
103 | static void memex(void); | |
104 | static int bsesc(void); | |
105 | static void dump(void); | |
106 | static void prdump(unsigned long, long); | |
107 | static int ppc_inst_dump(unsigned long, long, int); | |
108 | void print_address(unsigned long); | |
109 | static void backtrace(struct pt_regs *); | |
110 | static void excprint(struct pt_regs *); | |
111 | static void prregs(struct pt_regs *); | |
112 | static void memops(int); | |
113 | static void memlocate(void); | |
114 | static void memzcan(void); | |
115 | static void memdiffs(unsigned char *, unsigned char *, unsigned, unsigned); | |
116 | int skipbl(void); | |
117 | int scanhex(unsigned long *valp); | |
118 | static void scannl(void); | |
119 | static int hexdigit(int); | |
120 | void getstring(char *, int); | |
121 | static void flush_input(void); | |
122 | static int inchar(void); | |
123 | static void take_input(char *); | |
124 | static unsigned long read_spr(int); | |
125 | static void write_spr(int, unsigned long); | |
126 | static void super_regs(void); | |
127 | static void remove_bpts(void); | |
128 | static void insert_bpts(void); | |
129 | static void remove_cpu_bpts(void); | |
130 | static void insert_cpu_bpts(void); | |
131 | static struct bpt *at_breakpoint(unsigned long pc); | |
132 | static struct bpt *in_breakpoint_table(unsigned long pc, unsigned long *offp); | |
133 | static int do_step(struct pt_regs *); | |
134 | static void bpt_cmds(void); | |
135 | static void cacheflush(void); | |
136 | static int cpu_cmd(void); | |
137 | static void csum(void); | |
138 | static void bootcmds(void); | |
f78541dc | 139 | static void proccall(void); |
1da177e4 LT |
140 | void dump_segments(void); |
141 | static void symbol_lookup(void); | |
26c8af5f OH |
142 | static void xmon_show_stack(unsigned long sp, unsigned long lr, |
143 | unsigned long pc); | |
1da177e4 LT |
144 | static void xmon_print_symbol(unsigned long address, const char *mid, |
145 | const char *after); | |
146 | static const char *getvecname(unsigned long vec); | |
147 | ||
26c8af5f OH |
148 | int xmon_no_auto_backtrace; |
149 | ||
1da177e4 | 150 | extern int print_insn_powerpc(unsigned long, unsigned long, int); |
f78541dc PM |
151 | |
152 | extern void xmon_enter(void); | |
153 | extern void xmon_leave(void); | |
154 | ||
f78541dc PM |
155 | extern long setjmp(long *); |
156 | extern void longjmp(long *, long); | |
157 | extern void xmon_save_regs(struct pt_regs *); | |
158 | ||
159 | #ifdef CONFIG_PPC64 | |
160 | #define REG "%.16lx" | |
161 | #define REGS_PER_LINE 4 | |
162 | #define LAST_VOLATILE 13 | |
163 | #else | |
164 | #define REG "%.8lx" | |
165 | #define REGS_PER_LINE 8 | |
166 | #define LAST_VOLATILE 12 | |
167 | #endif | |
1da177e4 LT |
168 | |
169 | #define GETWORD(v) (((v)[0] << 24) + ((v)[1] << 16) + ((v)[2] << 8) + (v)[3]) | |
170 | ||
171 | #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ | |
172 | || ('a' <= (c) && (c) <= 'f') \ | |
173 | || ('A' <= (c) && (c) <= 'F')) | |
174 | #define isalnum(c) (('0' <= (c) && (c) <= '9') \ | |
175 | || ('a' <= (c) && (c) <= 'z') \ | |
176 | || ('A' <= (c) && (c) <= 'Z')) | |
177 | #define isspace(c) (c == ' ' || c == '\t' || c == 10 || c == 13 || c == 0) | |
178 | ||
179 | static char *help_string = "\ | |
180 | Commands:\n\ | |
181 | b show breakpoints\n\ | |
182 | bd set data breakpoint\n\ | |
183 | bi set instruction breakpoint\n\ | |
184 | bc clear breakpoint\n" | |
185 | #ifdef CONFIG_SMP | |
186 | "\ | |
187 | c print cpus stopped in xmon\n\ | |
188 | c# try to switch to cpu number h (in hex)\n" | |
189 | #endif | |
190 | "\ | |
191 | C checksum\n\ | |
192 | d dump bytes\n\ | |
193 | di dump instructions\n\ | |
194 | df dump float values\n\ | |
195 | dd dump double values\n\ | |
7e5b5938 | 196 | dr dump stream of raw bytes\n\ |
1da177e4 LT |
197 | e print exception information\n\ |
198 | f flush cache\n\ | |
199 | la lookup symbol+offset of specified address\n\ | |
200 | ls lookup address of specified symbol\n\ | |
201 | m examine/change memory\n\ | |
202 | mm move a block of memory\n\ | |
203 | ms set a block of memory\n\ | |
204 | md compare two blocks of memory\n\ | |
205 | ml locate a block of memory\n\ | |
206 | mz zero a block of memory\n\ | |
207 | mi show information about memory allocation\n\ | |
f78541dc | 208 | p call a procedure\n\ |
1da177e4 LT |
209 | r print registers\n\ |
210 | s single step\n\ | |
211 | S print special registers\n\ | |
212 | t print backtrace\n\ | |
1da177e4 | 213 | x exit monitor and recover\n\ |
f78541dc PM |
214 | X exit monitor and dont recover\n" |
215 | #ifdef CONFIG_PPC64 | |
216 | " u dump segment table or SLB\n" | |
217 | #endif | |
218 | #ifdef CONFIG_PPC_STD_MMU_32 | |
219 | " u dump segment registers\n" | |
220 | #endif | |
221 | " ? help\n" | |
222 | " zr reboot\n\ | |
1da177e4 LT |
223 | zh halt\n" |
224 | ; | |
225 | ||
226 | static struct pt_regs *xmon_regs; | |
227 | ||
f78541dc | 228 | static inline void sync(void) |
1da177e4 LT |
229 | { |
230 | asm volatile("sync; isync"); | |
231 | } | |
232 | ||
f78541dc PM |
233 | static inline void store_inst(void *p) |
234 | { | |
235 | asm volatile ("dcbst 0,%0; sync; icbi 0,%0; isync" : : "r" (p)); | |
236 | } | |
237 | ||
238 | static inline void cflush(void *p) | |
239 | { | |
240 | asm volatile ("dcbf 0,%0; icbi 0,%0" : : "r" (p)); | |
241 | } | |
242 | ||
243 | static inline void cinval(void *p) | |
244 | { | |
245 | asm volatile ("dcbi 0,%0; icbi 0,%0" : : "r" (p)); | |
246 | } | |
1da177e4 LT |
247 | |
248 | /* | |
249 | * Disable surveillance (the service processor watchdog function) | |
250 | * while we are in xmon. | |
251 | * XXX we should re-enable it when we leave. :) | |
252 | */ | |
253 | #define SURVEILLANCE_TOKEN 9000 | |
254 | ||
255 | static inline void disable_surveillance(void) | |
256 | { | |
257 | #ifdef CONFIG_PPC_PSERIES | |
258 | /* Since this can't be a module, args should end up below 4GB. */ | |
259 | static struct rtas_args args; | |
260 | ||
261 | /* | |
262 | * At this point we have got all the cpus we can into | |
263 | * xmon, so there is hopefully no other cpu calling RTAS | |
264 | * at the moment, even though we don't take rtas.lock. | |
265 | * If we did try to take rtas.lock there would be a | |
266 | * real possibility of deadlock. | |
267 | */ | |
268 | args.token = rtas_token("set-indicator"); | |
269 | if (args.token == RTAS_UNKNOWN_SERVICE) | |
270 | return; | |
271 | args.nargs = 3; | |
272 | args.nret = 1; | |
273 | args.rets = &args.args[3]; | |
274 | args.args[0] = SURVEILLANCE_TOKEN; | |
275 | args.args[1] = 0; | |
276 | args.args[2] = 0; | |
277 | enter_rtas(__pa(&args)); | |
278 | #endif /* CONFIG_PPC_PSERIES */ | |
279 | } | |
280 | ||
281 | #ifdef CONFIG_SMP | |
282 | static int xmon_speaker; | |
283 | ||
284 | static void get_output_lock(void) | |
285 | { | |
286 | int me = smp_processor_id() + 0x100; | |
287 | int last_speaker = 0, prev; | |
288 | long timeout; | |
289 | ||
290 | if (xmon_speaker == me) | |
291 | return; | |
292 | for (;;) { | |
293 | if (xmon_speaker == 0) { | |
294 | last_speaker = cmpxchg(&xmon_speaker, 0, me); | |
295 | if (last_speaker == 0) | |
296 | return; | |
297 | } | |
298 | timeout = 10000000; | |
299 | while (xmon_speaker == last_speaker) { | |
300 | if (--timeout > 0) | |
301 | continue; | |
302 | /* hostile takeover */ | |
303 | prev = cmpxchg(&xmon_speaker, last_speaker, me); | |
304 | if (prev == last_speaker) | |
305 | return; | |
306 | break; | |
307 | } | |
308 | } | |
309 | } | |
310 | ||
311 | static void release_output_lock(void) | |
312 | { | |
313 | xmon_speaker = 0; | |
314 | } | |
315 | #endif | |
316 | ||
b0da9856 | 317 | static int xmon_core(struct pt_regs *regs, int fromipi) |
1da177e4 LT |
318 | { |
319 | int cmd = 0; | |
320 | unsigned long msr; | |
321 | struct bpt *bp; | |
322 | long recurse_jmp[JMP_BUF_LEN]; | |
323 | unsigned long offset; | |
324 | #ifdef CONFIG_SMP | |
325 | int cpu; | |
326 | int secondary; | |
327 | unsigned long timeout; | |
328 | #endif | |
329 | ||
f78541dc PM |
330 | msr = mfmsr(); |
331 | mtmsr(msr & ~MSR_EE); /* disable interrupts */ | |
1da177e4 LT |
332 | |
333 | bp = in_breakpoint_table(regs->nip, &offset); | |
334 | if (bp != NULL) { | |
335 | regs->nip = bp->address + offset; | |
336 | atomic_dec(&bp->ref_count); | |
337 | } | |
338 | ||
339 | remove_cpu_bpts(); | |
340 | ||
341 | #ifdef CONFIG_SMP | |
342 | cpu = smp_processor_id(); | |
343 | if (cpu_isset(cpu, cpus_in_xmon)) { | |
344 | get_output_lock(); | |
345 | excprint(regs); | |
346 | printf("cpu 0x%x: Exception %lx %s in xmon, " | |
347 | "returning to main loop\n", | |
348 | cpu, regs->trap, getvecname(TRAP(regs))); | |
5cb4cc0d | 349 | release_output_lock(); |
1da177e4 LT |
350 | longjmp(xmon_fault_jmp[cpu], 1); |
351 | } | |
352 | ||
353 | if (setjmp(recurse_jmp) != 0) { | |
354 | if (!in_xmon || !xmon_gate) { | |
5cb4cc0d | 355 | get_output_lock(); |
1da177e4 LT |
356 | printf("xmon: WARNING: bad recursive fault " |
357 | "on cpu 0x%x\n", cpu); | |
5cb4cc0d | 358 | release_output_lock(); |
1da177e4 LT |
359 | goto waiting; |
360 | } | |
361 | secondary = !(xmon_taken && cpu == xmon_owner); | |
362 | goto cmdloop; | |
363 | } | |
364 | ||
365 | xmon_fault_jmp[cpu] = recurse_jmp; | |
366 | cpu_set(cpu, cpus_in_xmon); | |
367 | ||
368 | bp = NULL; | |
369 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) == (MSR_IR|MSR_SF)) | |
370 | bp = at_breakpoint(regs->nip); | |
371 | if (bp || (regs->msr & MSR_RI) == 0) | |
372 | fromipi = 0; | |
373 | ||
374 | if (!fromipi) { | |
375 | get_output_lock(); | |
376 | excprint(regs); | |
377 | if (bp) { | |
378 | printf("cpu 0x%x stopped at breakpoint 0x%x (", | |
379 | cpu, BP_NUM(bp)); | |
380 | xmon_print_symbol(regs->nip, " ", ")\n"); | |
381 | } | |
382 | if ((regs->msr & MSR_RI) == 0) | |
383 | printf("WARNING: exception is not recoverable, " | |
384 | "can't continue\n"); | |
385 | release_output_lock(); | |
386 | } | |
387 | ||
388 | waiting: | |
389 | secondary = 1; | |
390 | while (secondary && !xmon_gate) { | |
391 | if (in_xmon == 0) { | |
392 | if (fromipi) | |
393 | goto leave; | |
394 | secondary = test_and_set_bit(0, &in_xmon); | |
395 | } | |
396 | barrier(); | |
397 | } | |
398 | ||
399 | if (!secondary && !xmon_gate) { | |
400 | /* we are the first cpu to come in */ | |
401 | /* interrupt other cpu(s) */ | |
402 | int ncpus = num_online_cpus(); | |
403 | ||
404 | xmon_owner = cpu; | |
405 | mb(); | |
406 | if (ncpus > 1) { | |
407 | smp_send_debugger_break(MSG_ALL_BUT_SELF); | |
408 | /* wait for other cpus to come in */ | |
409 | for (timeout = 100000000; timeout != 0; --timeout) { | |
410 | if (cpus_weight(cpus_in_xmon) >= ncpus) | |
411 | break; | |
412 | barrier(); | |
413 | } | |
414 | } | |
415 | remove_bpts(); | |
416 | disable_surveillance(); | |
417 | /* for breakpoint or single step, print the current instr. */ | |
418 | if (bp || TRAP(regs) == 0xd00) | |
419 | ppc_inst_dump(regs->nip, 1, 0); | |
420 | printf("enter ? for help\n"); | |
421 | mb(); | |
422 | xmon_gate = 1; | |
423 | barrier(); | |
424 | } | |
425 | ||
426 | cmdloop: | |
427 | while (in_xmon) { | |
428 | if (secondary) { | |
429 | if (cpu == xmon_owner) { | |
430 | if (!test_and_set_bit(0, &xmon_taken)) { | |
431 | secondary = 0; | |
432 | continue; | |
433 | } | |
434 | /* missed it */ | |
435 | while (cpu == xmon_owner) | |
436 | barrier(); | |
437 | } | |
438 | barrier(); | |
439 | } else { | |
440 | cmd = cmds(regs); | |
441 | if (cmd != 0) { | |
442 | /* exiting xmon */ | |
443 | insert_bpts(); | |
444 | xmon_gate = 0; | |
445 | wmb(); | |
446 | in_xmon = 0; | |
447 | break; | |
448 | } | |
449 | /* have switched to some other cpu */ | |
450 | secondary = 1; | |
451 | } | |
452 | } | |
453 | leave: | |
454 | cpu_clear(cpu, cpus_in_xmon); | |
455 | xmon_fault_jmp[cpu] = NULL; | |
1da177e4 LT |
456 | #else |
457 | /* UP is simple... */ | |
458 | if (in_xmon) { | |
459 | printf("Exception %lx %s in xmon, returning to main loop\n", | |
460 | regs->trap, getvecname(TRAP(regs))); | |
461 | longjmp(xmon_fault_jmp[0], 1); | |
462 | } | |
463 | if (setjmp(recurse_jmp) == 0) { | |
464 | xmon_fault_jmp[0] = recurse_jmp; | |
465 | in_xmon = 1; | |
466 | ||
467 | excprint(regs); | |
468 | bp = at_breakpoint(regs->nip); | |
469 | if (bp) { | |
470 | printf("Stopped at breakpoint %x (", BP_NUM(bp)); | |
471 | xmon_print_symbol(regs->nip, " ", ")\n"); | |
472 | } | |
473 | if ((regs->msr & MSR_RI) == 0) | |
474 | printf("WARNING: exception is not recoverable, " | |
475 | "can't continue\n"); | |
476 | remove_bpts(); | |
477 | disable_surveillance(); | |
478 | /* for breakpoint or single step, print the current instr. */ | |
479 | if (bp || TRAP(regs) == 0xd00) | |
480 | ppc_inst_dump(regs->nip, 1, 0); | |
481 | printf("enter ? for help\n"); | |
482 | } | |
483 | ||
484 | cmd = cmds(regs); | |
485 | ||
486 | insert_bpts(); | |
487 | in_xmon = 0; | |
488 | #endif | |
489 | ||
490 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) == (MSR_IR|MSR_SF)) { | |
491 | bp = at_breakpoint(regs->nip); | |
492 | if (bp != NULL) { | |
493 | int stepped = emulate_step(regs, bp->instr[0]); | |
494 | if (stepped == 0) { | |
495 | regs->nip = (unsigned long) &bp->instr[0]; | |
496 | atomic_inc(&bp->ref_count); | |
497 | } else if (stepped < 0) { | |
498 | printf("Couldn't single-step %s instruction\n", | |
499 | (IS_RFID(bp->instr[0])? "rfid": "mtmsrd")); | |
500 | } | |
501 | } | |
502 | } | |
503 | ||
504 | insert_cpu_bpts(); | |
505 | ||
f78541dc | 506 | mtmsr(msr); /* restore interrupt enable */ |
1da177e4 LT |
507 | |
508 | return cmd != 'X'; | |
509 | } | |
510 | ||
511 | int xmon(struct pt_regs *excp) | |
512 | { | |
513 | struct pt_regs regs; | |
514 | ||
515 | if (excp == NULL) { | |
f78541dc | 516 | xmon_save_regs(®s); |
1da177e4 LT |
517 | excp = ®s; |
518 | } | |
519 | return xmon_core(excp, 0); | |
520 | } | |
f78541dc PM |
521 | EXPORT_SYMBOL(xmon); |
522 | ||
523 | irqreturn_t | |
524 | xmon_irq(int irq, void *d, struct pt_regs *regs) | |
525 | { | |
526 | unsigned long flags; | |
527 | local_irq_save(flags); | |
528 | printf("Keyboard interrupt\n"); | |
529 | xmon(regs); | |
530 | local_irq_restore(flags); | |
531 | return IRQ_HANDLED; | |
532 | } | |
1da177e4 | 533 | |
b0da9856 | 534 | static int xmon_bpt(struct pt_regs *regs) |
1da177e4 LT |
535 | { |
536 | struct bpt *bp; | |
537 | unsigned long offset; | |
538 | ||
539 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) != (MSR_IR|MSR_SF)) | |
540 | return 0; | |
541 | ||
542 | /* Are we at the trap at bp->instr[1] for some bp? */ | |
543 | bp = in_breakpoint_table(regs->nip, &offset); | |
544 | if (bp != NULL && offset == 4) { | |
545 | regs->nip = bp->address + 4; | |
546 | atomic_dec(&bp->ref_count); | |
547 | return 1; | |
548 | } | |
549 | ||
550 | /* Are we at a breakpoint? */ | |
551 | bp = at_breakpoint(regs->nip); | |
552 | if (!bp) | |
553 | return 0; | |
554 | ||
555 | xmon_core(regs, 0); | |
556 | ||
557 | return 1; | |
558 | } | |
559 | ||
b0da9856 | 560 | static int xmon_sstep(struct pt_regs *regs) |
1da177e4 LT |
561 | { |
562 | if (user_mode(regs)) | |
563 | return 0; | |
564 | xmon_core(regs, 0); | |
565 | return 1; | |
566 | } | |
567 | ||
b0da9856 | 568 | static int xmon_dabr_match(struct pt_regs *regs) |
1da177e4 LT |
569 | { |
570 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) != (MSR_IR|MSR_SF)) | |
571 | return 0; | |
fd9648df AB |
572 | if (dabr.enabled == 0) |
573 | return 0; | |
1da177e4 LT |
574 | xmon_core(regs, 0); |
575 | return 1; | |
576 | } | |
577 | ||
b0da9856 | 578 | static int xmon_iabr_match(struct pt_regs *regs) |
1da177e4 LT |
579 | { |
580 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) != (MSR_IR|MSR_SF)) | |
581 | return 0; | |
582 | if (iabr == 0) | |
583 | return 0; | |
584 | xmon_core(regs, 0); | |
585 | return 1; | |
586 | } | |
587 | ||
b0da9856 | 588 | static int xmon_ipi(struct pt_regs *regs) |
1da177e4 LT |
589 | { |
590 | #ifdef CONFIG_SMP | |
591 | if (in_xmon && !cpu_isset(smp_processor_id(), cpus_in_xmon)) | |
592 | xmon_core(regs, 1); | |
593 | #endif | |
594 | return 0; | |
595 | } | |
596 | ||
b0da9856 | 597 | static int xmon_fault_handler(struct pt_regs *regs) |
1da177e4 LT |
598 | { |
599 | struct bpt *bp; | |
600 | unsigned long offset; | |
601 | ||
602 | if (in_xmon && catch_memory_errors) | |
603 | handle_fault(regs); /* doesn't return */ | |
604 | ||
605 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) == (MSR_IR|MSR_SF)) { | |
606 | bp = in_breakpoint_table(regs->nip, &offset); | |
607 | if (bp != NULL) { | |
608 | regs->nip = bp->address + offset; | |
609 | atomic_dec(&bp->ref_count); | |
610 | } | |
611 | } | |
612 | ||
613 | return 0; | |
614 | } | |
615 | ||
1da177e4 LT |
616 | static struct bpt *at_breakpoint(unsigned long pc) |
617 | { | |
618 | int i; | |
619 | struct bpt *bp; | |
620 | ||
621 | bp = bpts; | |
622 | for (i = 0; i < NBPTS; ++i, ++bp) | |
623 | if (bp->enabled && pc == bp->address) | |
624 | return bp; | |
625 | return NULL; | |
626 | } | |
627 | ||
628 | static struct bpt *in_breakpoint_table(unsigned long nip, unsigned long *offp) | |
629 | { | |
630 | unsigned long off; | |
631 | ||
632 | off = nip - (unsigned long) bpts; | |
633 | if (off >= sizeof(bpts)) | |
634 | return NULL; | |
635 | off %= sizeof(struct bpt); | |
636 | if (off != offsetof(struct bpt, instr[0]) | |
637 | && off != offsetof(struct bpt, instr[1])) | |
638 | return NULL; | |
639 | *offp = off - offsetof(struct bpt, instr[0]); | |
640 | return (struct bpt *) (nip - off); | |
641 | } | |
642 | ||
643 | static struct bpt *new_breakpoint(unsigned long a) | |
644 | { | |
645 | struct bpt *bp; | |
646 | ||
647 | a &= ~3UL; | |
648 | bp = at_breakpoint(a); | |
649 | if (bp) | |
650 | return bp; | |
651 | ||
652 | for (bp = bpts; bp < &bpts[NBPTS]; ++bp) { | |
653 | if (!bp->enabled && atomic_read(&bp->ref_count) == 0) { | |
654 | bp->address = a; | |
655 | bp->instr[1] = bpinstr; | |
656 | store_inst(&bp->instr[1]); | |
657 | return bp; | |
658 | } | |
659 | } | |
660 | ||
661 | printf("Sorry, no free breakpoints. Please clear one first.\n"); | |
662 | return NULL; | |
663 | } | |
664 | ||
665 | static void insert_bpts(void) | |
666 | { | |
667 | int i; | |
668 | struct bpt *bp; | |
669 | ||
670 | bp = bpts; | |
671 | for (i = 0; i < NBPTS; ++i, ++bp) { | |
672 | if ((bp->enabled & (BP_TRAP|BP_IABR)) == 0) | |
673 | continue; | |
674 | if (mread(bp->address, &bp->instr[0], 4) != 4) { | |
675 | printf("Couldn't read instruction at %lx, " | |
676 | "disabling breakpoint there\n", bp->address); | |
677 | bp->enabled = 0; | |
678 | continue; | |
679 | } | |
680 | if (IS_MTMSRD(bp->instr[0]) || IS_RFID(bp->instr[0])) { | |
681 | printf("Breakpoint at %lx is on an mtmsrd or rfid " | |
682 | "instruction, disabling it\n", bp->address); | |
683 | bp->enabled = 0; | |
684 | continue; | |
685 | } | |
686 | store_inst(&bp->instr[0]); | |
687 | if (bp->enabled & BP_IABR) | |
688 | continue; | |
689 | if (mwrite(bp->address, &bpinstr, 4) != 4) { | |
690 | printf("Couldn't write instruction at %lx, " | |
691 | "disabling breakpoint there\n", bp->address); | |
692 | bp->enabled &= ~BP_TRAP; | |
693 | continue; | |
694 | } | |
695 | store_inst((void *)bp->address); | |
696 | } | |
697 | } | |
698 | ||
699 | static void insert_cpu_bpts(void) | |
700 | { | |
701 | if (dabr.enabled) | |
fd9648df | 702 | set_dabr(dabr.address | (dabr.enabled & 7)); |
1da177e4 | 703 | if (iabr && cpu_has_feature(CPU_FTR_IABR)) |
f78541dc | 704 | mtspr(SPRN_IABR, iabr->address |
1da177e4 LT |
705 | | (iabr->enabled & (BP_IABR|BP_IABR_TE))); |
706 | } | |
707 | ||
708 | static void remove_bpts(void) | |
709 | { | |
710 | int i; | |
711 | struct bpt *bp; | |
712 | unsigned instr; | |
713 | ||
714 | bp = bpts; | |
715 | for (i = 0; i < NBPTS; ++i, ++bp) { | |
716 | if ((bp->enabled & (BP_TRAP|BP_IABR)) != BP_TRAP) | |
717 | continue; | |
718 | if (mread(bp->address, &instr, 4) == 4 | |
719 | && instr == bpinstr | |
720 | && mwrite(bp->address, &bp->instr, 4) != 4) | |
721 | printf("Couldn't remove breakpoint at %lx\n", | |
722 | bp->address); | |
723 | else | |
724 | store_inst((void *)bp->address); | |
725 | } | |
726 | } | |
727 | ||
728 | static void remove_cpu_bpts(void) | |
729 | { | |
fd9648df | 730 | set_dabr(0); |
1da177e4 | 731 | if (cpu_has_feature(CPU_FTR_IABR)) |
f78541dc | 732 | mtspr(SPRN_IABR, 0); |
1da177e4 LT |
733 | } |
734 | ||
735 | /* Command interpreting routine */ | |
736 | static char *last_cmd; | |
737 | ||
738 | static int | |
739 | cmds(struct pt_regs *excp) | |
740 | { | |
741 | int cmd = 0; | |
742 | ||
743 | last_cmd = NULL; | |
744 | xmon_regs = excp; | |
26c8af5f OH |
745 | |
746 | if (!xmon_no_auto_backtrace) { | |
747 | xmon_no_auto_backtrace = 1; | |
748 | xmon_show_stack(excp->gpr[1], excp->link, excp->nip); | |
749 | } | |
750 | ||
1da177e4 LT |
751 | for(;;) { |
752 | #ifdef CONFIG_SMP | |
753 | printf("%x:", smp_processor_id()); | |
754 | #endif /* CONFIG_SMP */ | |
755 | printf("mon> "); | |
1da177e4 LT |
756 | flush_input(); |
757 | termch = 0; | |
758 | cmd = skipbl(); | |
759 | if( cmd == '\n' ) { | |
760 | if (last_cmd == NULL) | |
761 | continue; | |
762 | take_input(last_cmd); | |
763 | last_cmd = NULL; | |
764 | cmd = inchar(); | |
765 | } | |
766 | switch (cmd) { | |
767 | case 'm': | |
768 | cmd = inchar(); | |
769 | switch (cmd) { | |
770 | case 'm': | |
771 | case 's': | |
772 | case 'd': | |
773 | memops(cmd); | |
774 | break; | |
775 | case 'l': | |
776 | memlocate(); | |
777 | break; | |
778 | case 'z': | |
779 | memzcan(); | |
780 | break; | |
781 | case 'i': | |
782 | show_mem(); | |
783 | break; | |
784 | default: | |
785 | termch = cmd; | |
786 | memex(); | |
787 | } | |
788 | break; | |
789 | case 'd': | |
790 | dump(); | |
791 | break; | |
792 | case 'l': | |
793 | symbol_lookup(); | |
794 | break; | |
795 | case 'r': | |
796 | prregs(excp); /* print regs */ | |
797 | break; | |
798 | case 'e': | |
799 | excprint(excp); | |
800 | break; | |
801 | case 'S': | |
802 | super_regs(); | |
803 | break; | |
804 | case 't': | |
805 | backtrace(excp); | |
806 | break; | |
807 | case 'f': | |
808 | cacheflush(); | |
809 | break; | |
810 | case 's': | |
811 | if (do_step(excp)) | |
812 | return cmd; | |
813 | break; | |
814 | case 'x': | |
815 | case 'X': | |
bb6b9b28 | 816 | return cmd; |
1da177e4 | 817 | case EOF: |
bb6b9b28 BH |
818 | printf(" <no input ...>\n"); |
819 | mdelay(2000); | |
1da177e4 LT |
820 | return cmd; |
821 | case '?': | |
822 | printf(help_string); | |
823 | break; | |
1da177e4 LT |
824 | case 'b': |
825 | bpt_cmds(); | |
826 | break; | |
827 | case 'C': | |
828 | csum(); | |
829 | break; | |
830 | case 'c': | |
831 | if (cpu_cmd()) | |
832 | return 0; | |
833 | break; | |
834 | case 'z': | |
835 | bootcmds(); | |
836 | break; | |
f78541dc PM |
837 | case 'p': |
838 | proccall(); | |
1da177e4 | 839 | break; |
f78541dc | 840 | #ifdef CONFIG_PPC_STD_MMU |
1da177e4 LT |
841 | case 'u': |
842 | dump_segments(); | |
843 | break; | |
f78541dc | 844 | #endif |
1da177e4 LT |
845 | default: |
846 | printf("Unrecognized command: "); | |
847 | do { | |
848 | if (' ' < cmd && cmd <= '~') | |
849 | putchar(cmd); | |
850 | else | |
851 | printf("\\x%x", cmd); | |
852 | cmd = inchar(); | |
853 | } while (cmd != '\n'); | |
854 | printf(" (type ? for help)\n"); | |
855 | break; | |
856 | } | |
857 | } | |
858 | } | |
859 | ||
860 | /* | |
861 | * Step a single instruction. | |
862 | * Some instructions we emulate, others we execute with MSR_SE set. | |
863 | */ | |
864 | static int do_step(struct pt_regs *regs) | |
865 | { | |
866 | unsigned int instr; | |
867 | int stepped; | |
868 | ||
869 | /* check we are in 64-bit kernel mode, translation enabled */ | |
870 | if ((regs->msr & (MSR_SF|MSR_PR|MSR_IR)) == (MSR_SF|MSR_IR)) { | |
871 | if (mread(regs->nip, &instr, 4) == 4) { | |
872 | stepped = emulate_step(regs, instr); | |
873 | if (stepped < 0) { | |
874 | printf("Couldn't single-step %s instruction\n", | |
875 | (IS_RFID(instr)? "rfid": "mtmsrd")); | |
876 | return 0; | |
877 | } | |
878 | if (stepped > 0) { | |
879 | regs->trap = 0xd00 | (regs->trap & 1); | |
880 | printf("stepped to "); | |
881 | xmon_print_symbol(regs->nip, " ", "\n"); | |
882 | ppc_inst_dump(regs->nip, 1, 0); | |
883 | return 0; | |
884 | } | |
885 | } | |
886 | } | |
887 | regs->msr |= MSR_SE; | |
888 | return 1; | |
889 | } | |
890 | ||
891 | static void bootcmds(void) | |
892 | { | |
893 | int cmd; | |
894 | ||
895 | cmd = inchar(); | |
896 | if (cmd == 'r') | |
897 | ppc_md.restart(NULL); | |
898 | else if (cmd == 'h') | |
899 | ppc_md.halt(); | |
900 | else if (cmd == 'p') | |
901 | ppc_md.power_off(); | |
902 | } | |
903 | ||
904 | static int cpu_cmd(void) | |
905 | { | |
906 | #ifdef CONFIG_SMP | |
907 | unsigned long cpu; | |
908 | int timeout; | |
909 | int count; | |
910 | ||
911 | if (!scanhex(&cpu)) { | |
912 | /* print cpus waiting or in xmon */ | |
913 | printf("cpus stopped:"); | |
914 | count = 0; | |
915 | for (cpu = 0; cpu < NR_CPUS; ++cpu) { | |
916 | if (cpu_isset(cpu, cpus_in_xmon)) { | |
917 | if (count == 0) | |
918 | printf(" %x", cpu); | |
919 | ++count; | |
920 | } else { | |
921 | if (count > 1) | |
922 | printf("-%x", cpu - 1); | |
923 | count = 0; | |
924 | } | |
925 | } | |
926 | if (count > 1) | |
927 | printf("-%x", NR_CPUS - 1); | |
928 | printf("\n"); | |
929 | return 0; | |
930 | } | |
931 | /* try to switch to cpu specified */ | |
932 | if (!cpu_isset(cpu, cpus_in_xmon)) { | |
933 | printf("cpu 0x%x isn't in xmon\n", cpu); | |
934 | return 0; | |
935 | } | |
936 | xmon_taken = 0; | |
937 | mb(); | |
938 | xmon_owner = cpu; | |
939 | timeout = 10000000; | |
940 | while (!xmon_taken) { | |
941 | if (--timeout == 0) { | |
942 | if (test_and_set_bit(0, &xmon_taken)) | |
943 | break; | |
944 | /* take control back */ | |
945 | mb(); | |
946 | xmon_owner = smp_processor_id(); | |
947 | printf("cpu %u didn't take control\n", cpu); | |
948 | return 0; | |
949 | } | |
950 | barrier(); | |
951 | } | |
952 | return 1; | |
953 | #else | |
954 | return 0; | |
955 | #endif /* CONFIG_SMP */ | |
956 | } | |
957 | ||
958 | static unsigned short fcstab[256] = { | |
959 | 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, | |
960 | 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, | |
961 | 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, | |
962 | 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, | |
963 | 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, | |
964 | 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, | |
965 | 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, | |
966 | 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, | |
967 | 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, | |
968 | 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, | |
969 | 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, | |
970 | 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, | |
971 | 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, | |
972 | 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, | |
973 | 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, | |
974 | 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, | |
975 | 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, | |
976 | 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, | |
977 | 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, | |
978 | 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, | |
979 | 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, | |
980 | 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, | |
981 | 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, | |
982 | 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, | |
983 | 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, | |
984 | 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, | |
985 | 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, | |
986 | 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, | |
987 | 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, | |
988 | 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, | |
989 | 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, | |
990 | 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 | |
991 | }; | |
992 | ||
993 | #define FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff]) | |
994 | ||
995 | static void | |
996 | csum(void) | |
997 | { | |
998 | unsigned int i; | |
999 | unsigned short fcs; | |
1000 | unsigned char v; | |
1001 | ||
1002 | if (!scanhex(&adrs)) | |
1003 | return; | |
1004 | if (!scanhex(&ncsum)) | |
1005 | return; | |
1006 | fcs = 0xffff; | |
1007 | for (i = 0; i < ncsum; ++i) { | |
1008 | if (mread(adrs+i, &v, 1) == 0) { | |
1009 | printf("csum stopped at %x\n", adrs+i); | |
1010 | break; | |
1011 | } | |
1012 | fcs = FCS(fcs, v); | |
1013 | } | |
1014 | printf("%x\n", fcs); | |
1015 | } | |
1016 | ||
1017 | /* | |
1018 | * Check if this is a suitable place to put a breakpoint. | |
1019 | */ | |
1020 | static long check_bp_loc(unsigned long addr) | |
1021 | { | |
1022 | unsigned int instr; | |
1023 | ||
1024 | addr &= ~3; | |
51fae6de | 1025 | if (!is_kernel_addr(addr)) { |
1da177e4 LT |
1026 | printf("Breakpoints may only be placed at kernel addresses\n"); |
1027 | return 0; | |
1028 | } | |
1029 | if (!mread(addr, &instr, sizeof(instr))) { | |
1030 | printf("Can't read instruction at address %lx\n", addr); | |
1031 | return 0; | |
1032 | } | |
1033 | if (IS_MTMSRD(instr) || IS_RFID(instr)) { | |
1034 | printf("Breakpoints may not be placed on mtmsrd or rfid " | |
1035 | "instructions\n"); | |
1036 | return 0; | |
1037 | } | |
1038 | return 1; | |
1039 | } | |
1040 | ||
1041 | static char *breakpoint_help_string = | |
1042 | "Breakpoint command usage:\n" | |
1043 | "b show breakpoints\n" | |
1044 | "b <addr> [cnt] set breakpoint at given instr addr\n" | |
1045 | "bc clear all breakpoints\n" | |
1046 | "bc <n/addr> clear breakpoint number n or at addr\n" | |
1047 | "bi <addr> [cnt] set hardware instr breakpoint (POWER3/RS64 only)\n" | |
1048 | "bd <addr> [cnt] set hardware data breakpoint\n" | |
1049 | ""; | |
1050 | ||
1051 | static void | |
1052 | bpt_cmds(void) | |
1053 | { | |
1054 | int cmd; | |
1055 | unsigned long a; | |
1056 | int mode, i; | |
1057 | struct bpt *bp; | |
1058 | const char badaddr[] = "Only kernel addresses are permitted " | |
1059 | "for breakpoints\n"; | |
1060 | ||
1061 | cmd = inchar(); | |
1062 | switch (cmd) { | |
f78541dc | 1063 | #ifndef CONFIG_8xx |
1da177e4 LT |
1064 | case 'd': /* bd - hardware data breakpoint */ |
1065 | mode = 7; | |
1066 | cmd = inchar(); | |
1067 | if (cmd == 'r') | |
1068 | mode = 5; | |
1069 | else if (cmd == 'w') | |
1070 | mode = 6; | |
1071 | else | |
1072 | termch = cmd; | |
1073 | dabr.address = 0; | |
1074 | dabr.enabled = 0; | |
1075 | if (scanhex(&dabr.address)) { | |
51fae6de | 1076 | if (!is_kernel_addr(dabr.address)) { |
1da177e4 LT |
1077 | printf(badaddr); |
1078 | break; | |
1079 | } | |
1080 | dabr.address &= ~7; | |
1081 | dabr.enabled = mode | BP_DABR; | |
1082 | } | |
1083 | break; | |
1084 | ||
1085 | case 'i': /* bi - hardware instr breakpoint */ | |
1086 | if (!cpu_has_feature(CPU_FTR_IABR)) { | |
1087 | printf("Hardware instruction breakpoint " | |
1088 | "not supported on this cpu\n"); | |
1089 | break; | |
1090 | } | |
1091 | if (iabr) { | |
1092 | iabr->enabled &= ~(BP_IABR | BP_IABR_TE); | |
1093 | iabr = NULL; | |
1094 | } | |
1095 | if (!scanhex(&a)) | |
1096 | break; | |
1097 | if (!check_bp_loc(a)) | |
1098 | break; | |
1099 | bp = new_breakpoint(a); | |
1100 | if (bp != NULL) { | |
1101 | bp->enabled |= BP_IABR | BP_IABR_TE; | |
1102 | iabr = bp; | |
1103 | } | |
1104 | break; | |
f78541dc | 1105 | #endif |
1da177e4 LT |
1106 | |
1107 | case 'c': | |
1108 | if (!scanhex(&a)) { | |
1109 | /* clear all breakpoints */ | |
1110 | for (i = 0; i < NBPTS; ++i) | |
1111 | bpts[i].enabled = 0; | |
1112 | iabr = NULL; | |
1113 | dabr.enabled = 0; | |
1114 | printf("All breakpoints cleared\n"); | |
1115 | break; | |
1116 | } | |
1117 | ||
1118 | if (a <= NBPTS && a >= 1) { | |
1119 | /* assume a breakpoint number */ | |
1120 | bp = &bpts[a-1]; /* bp nums are 1 based */ | |
1121 | } else { | |
1122 | /* assume a breakpoint address */ | |
1123 | bp = at_breakpoint(a); | |
1124 | if (bp == 0) { | |
1125 | printf("No breakpoint at %x\n", a); | |
1126 | break; | |
1127 | } | |
1128 | } | |
1129 | ||
1130 | printf("Cleared breakpoint %x (", BP_NUM(bp)); | |
1131 | xmon_print_symbol(bp->address, " ", ")\n"); | |
1132 | bp->enabled = 0; | |
1133 | break; | |
1134 | ||
1135 | default: | |
1136 | termch = cmd; | |
1137 | cmd = skipbl(); | |
1138 | if (cmd == '?') { | |
1139 | printf(breakpoint_help_string); | |
1140 | break; | |
1141 | } | |
1142 | termch = cmd; | |
1143 | if (!scanhex(&a)) { | |
1144 | /* print all breakpoints */ | |
1145 | printf(" type address\n"); | |
1146 | if (dabr.enabled) { | |
f78541dc | 1147 | printf(" data "REG" [", dabr.address); |
1da177e4 LT |
1148 | if (dabr.enabled & 1) |
1149 | printf("r"); | |
1150 | if (dabr.enabled & 2) | |
1151 | printf("w"); | |
1152 | printf("]\n"); | |
1153 | } | |
1154 | for (bp = bpts; bp < &bpts[NBPTS]; ++bp) { | |
1155 | if (!bp->enabled) | |
1156 | continue; | |
1157 | printf("%2x %s ", BP_NUM(bp), | |
1158 | (bp->enabled & BP_IABR)? "inst": "trap"); | |
1159 | xmon_print_symbol(bp->address, " ", "\n"); | |
1160 | } | |
1161 | break; | |
1162 | } | |
1163 | ||
1164 | if (!check_bp_loc(a)) | |
1165 | break; | |
1166 | bp = new_breakpoint(a); | |
1167 | if (bp != NULL) | |
1168 | bp->enabled |= BP_TRAP; | |
1169 | break; | |
1170 | } | |
1171 | } | |
1172 | ||
1173 | /* Very cheap human name for vector lookup. */ | |
1174 | static | |
1175 | const char *getvecname(unsigned long vec) | |
1176 | { | |
1177 | char *ret; | |
1178 | ||
1179 | switch (vec) { | |
1180 | case 0x100: ret = "(System Reset)"; break; | |
1181 | case 0x200: ret = "(Machine Check)"; break; | |
1182 | case 0x300: ret = "(Data Access)"; break; | |
1183 | case 0x380: ret = "(Data SLB Access)"; break; | |
1184 | case 0x400: ret = "(Instruction Access)"; break; | |
1185 | case 0x480: ret = "(Instruction SLB Access)"; break; | |
1186 | case 0x500: ret = "(Hardware Interrupt)"; break; | |
1187 | case 0x600: ret = "(Alignment)"; break; | |
1188 | case 0x700: ret = "(Program Check)"; break; | |
1189 | case 0x800: ret = "(FPU Unavailable)"; break; | |
1190 | case 0x900: ret = "(Decrementer)"; break; | |
1191 | case 0xc00: ret = "(System Call)"; break; | |
1192 | case 0xd00: ret = "(Single Step)"; break; | |
1193 | case 0xf00: ret = "(Performance Monitor)"; break; | |
1194 | case 0xf20: ret = "(Altivec Unavailable)"; break; | |
1195 | case 0x1300: ret = "(Instruction Breakpoint)"; break; | |
1196 | default: ret = ""; | |
1197 | } | |
1198 | return ret; | |
1199 | } | |
1200 | ||
1201 | static void get_function_bounds(unsigned long pc, unsigned long *startp, | |
1202 | unsigned long *endp) | |
1203 | { | |
1204 | unsigned long size, offset; | |
1205 | const char *name; | |
1206 | char *modname; | |
1207 | ||
1208 | *startp = *endp = 0; | |
1209 | if (pc == 0) | |
1210 | return; | |
1211 | if (setjmp(bus_error_jmp) == 0) { | |
1212 | catch_memory_errors = 1; | |
1213 | sync(); | |
1214 | name = kallsyms_lookup(pc, &size, &offset, &modname, tmpstr); | |
1215 | if (name != NULL) { | |
1216 | *startp = pc - offset; | |
1217 | *endp = pc - offset + size; | |
1218 | } | |
1219 | sync(); | |
1220 | } | |
1221 | catch_memory_errors = 0; | |
1222 | } | |
1223 | ||
1224 | static int xmon_depth_to_print = 64; | |
1225 | ||
f78541dc PM |
1226 | #ifdef CONFIG_PPC64 |
1227 | #define LRSAVE_OFFSET 0x10 | |
1228 | #define REG_FRAME_MARKER 0x7265677368657265ul /* "regshere" */ | |
1229 | #define MARKER_OFFSET 0x60 | |
1230 | #define REGS_OFFSET 0x70 | |
1231 | #else | |
1232 | #define LRSAVE_OFFSET 4 | |
1233 | #define REG_FRAME_MARKER 0x72656773 | |
1234 | #define MARKER_OFFSET 8 | |
1235 | #define REGS_OFFSET 16 | |
1236 | #endif | |
1237 | ||
1da177e4 LT |
1238 | static void xmon_show_stack(unsigned long sp, unsigned long lr, |
1239 | unsigned long pc) | |
1240 | { | |
1241 | unsigned long ip; | |
1242 | unsigned long newsp; | |
1243 | unsigned long marker; | |
1244 | int count = 0; | |
1245 | struct pt_regs regs; | |
1246 | ||
1247 | do { | |
1248 | if (sp < PAGE_OFFSET) { | |
1249 | if (sp != 0) | |
1250 | printf("SP (%lx) is in userspace\n", sp); | |
1251 | break; | |
1252 | } | |
1253 | ||
f78541dc | 1254 | if (!mread(sp + LRSAVE_OFFSET, &ip, sizeof(unsigned long)) |
1da177e4 LT |
1255 | || !mread(sp, &newsp, sizeof(unsigned long))) { |
1256 | printf("Couldn't read stack frame at %lx\n", sp); | |
1257 | break; | |
1258 | } | |
1259 | ||
1260 | /* | |
1261 | * For the first stack frame, try to work out if | |
1262 | * LR and/or the saved LR value in the bottommost | |
1263 | * stack frame are valid. | |
1264 | */ | |
1265 | if ((pc | lr) != 0) { | |
1266 | unsigned long fnstart, fnend; | |
1267 | unsigned long nextip; | |
1268 | int printip = 1; | |
1269 | ||
1270 | get_function_bounds(pc, &fnstart, &fnend); | |
1271 | nextip = 0; | |
1272 | if (newsp > sp) | |
f78541dc | 1273 | mread(newsp + LRSAVE_OFFSET, &nextip, |
1da177e4 LT |
1274 | sizeof(unsigned long)); |
1275 | if (lr == ip) { | |
1276 | if (lr < PAGE_OFFSET | |
1277 | || (fnstart <= lr && lr < fnend)) | |
1278 | printip = 0; | |
1279 | } else if (lr == nextip) { | |
1280 | printip = 0; | |
1281 | } else if (lr >= PAGE_OFFSET | |
1282 | && !(fnstart <= lr && lr < fnend)) { | |
1283 | printf("[link register ] "); | |
1284 | xmon_print_symbol(lr, " ", "\n"); | |
1285 | } | |
1286 | if (printip) { | |
f78541dc | 1287 | printf("["REG"] ", sp); |
1da177e4 LT |
1288 | xmon_print_symbol(ip, " ", " (unreliable)\n"); |
1289 | } | |
1290 | pc = lr = 0; | |
1291 | ||
1292 | } else { | |
f78541dc | 1293 | printf("["REG"] ", sp); |
1da177e4 LT |
1294 | xmon_print_symbol(ip, " ", "\n"); |
1295 | } | |
1296 | ||
1297 | /* Look for "regshere" marker to see if this is | |
1298 | an exception frame. */ | |
f78541dc PM |
1299 | if (mread(sp + MARKER_OFFSET, &marker, sizeof(unsigned long)) |
1300 | && marker == REG_FRAME_MARKER) { | |
1301 | if (mread(sp + REGS_OFFSET, ®s, sizeof(regs)) | |
1da177e4 LT |
1302 | != sizeof(regs)) { |
1303 | printf("Couldn't read registers at %lx\n", | |
f78541dc | 1304 | sp + REGS_OFFSET); |
1da177e4 LT |
1305 | break; |
1306 | } | |
1307 | printf("--- Exception: %lx %s at ", regs.trap, | |
1308 | getvecname(TRAP(®s))); | |
1309 | pc = regs.nip; | |
1310 | lr = regs.link; | |
1311 | xmon_print_symbol(pc, " ", "\n"); | |
1312 | } | |
1313 | ||
1314 | if (newsp == 0) | |
1315 | break; | |
1316 | ||
1317 | sp = newsp; | |
1318 | } while (count++ < xmon_depth_to_print); | |
1319 | } | |
1320 | ||
1321 | static void backtrace(struct pt_regs *excp) | |
1322 | { | |
1323 | unsigned long sp; | |
1324 | ||
1325 | if (scanhex(&sp)) | |
1326 | xmon_show_stack(sp, 0, 0); | |
1327 | else | |
1328 | xmon_show_stack(excp->gpr[1], excp->link, excp->nip); | |
1329 | scannl(); | |
1330 | } | |
1331 | ||
1332 | static void print_bug_trap(struct pt_regs *regs) | |
1333 | { | |
1334 | struct bug_entry *bug; | |
1335 | unsigned long addr; | |
1336 | ||
1337 | if (regs->msr & MSR_PR) | |
1338 | return; /* not in kernel */ | |
1339 | addr = regs->nip; /* address of trap instruction */ | |
1340 | if (addr < PAGE_OFFSET) | |
1341 | return; | |
1342 | bug = find_bug(regs->nip); | |
1343 | if (bug == NULL) | |
1344 | return; | |
1345 | if (bug->line & BUG_WARNING_TRAP) | |
1346 | return; | |
1347 | ||
1348 | printf("kernel BUG in %s at %s:%d!\n", | |
1349 | bug->function, bug->file, (unsigned int)bug->line); | |
1350 | } | |
1351 | ||
1352 | void excprint(struct pt_regs *fp) | |
1353 | { | |
1354 | unsigned long trap; | |
1355 | ||
1356 | #ifdef CONFIG_SMP | |
1357 | printf("cpu 0x%x: ", smp_processor_id()); | |
1358 | #endif /* CONFIG_SMP */ | |
1359 | ||
1360 | trap = TRAP(fp); | |
1361 | printf("Vector: %lx %s at [%lx]\n", fp->trap, getvecname(trap), fp); | |
1362 | printf(" pc: "); | |
1363 | xmon_print_symbol(fp->nip, ": ", "\n"); | |
1364 | ||
1365 | printf(" lr: ", fp->link); | |
1366 | xmon_print_symbol(fp->link, ": ", "\n"); | |
1367 | ||
1368 | printf(" sp: %lx\n", fp->gpr[1]); | |
1369 | printf(" msr: %lx\n", fp->msr); | |
1370 | ||
1371 | if (trap == 0x300 || trap == 0x380 || trap == 0x600) { | |
1372 | printf(" dar: %lx\n", fp->dar); | |
1373 | if (trap != 0x380) | |
1374 | printf(" dsisr: %lx\n", fp->dsisr); | |
1375 | } | |
1376 | ||
1377 | printf(" current = 0x%lx\n", current); | |
f78541dc | 1378 | #ifdef CONFIG_PPC64 |
1da177e4 | 1379 | printf(" paca = 0x%lx\n", get_paca()); |
f78541dc | 1380 | #endif |
1da177e4 LT |
1381 | if (current) { |
1382 | printf(" pid = %ld, comm = %s\n", | |
1383 | current->pid, current->comm); | |
1384 | } | |
1385 | ||
1386 | if (trap == 0x700) | |
1387 | print_bug_trap(fp); | |
1388 | } | |
1389 | ||
1390 | void prregs(struct pt_regs *fp) | |
1391 | { | |
f78541dc | 1392 | int n, trap; |
1da177e4 LT |
1393 | unsigned long base; |
1394 | struct pt_regs regs; | |
1395 | ||
1396 | if (scanhex(&base)) { | |
1397 | if (setjmp(bus_error_jmp) == 0) { | |
1398 | catch_memory_errors = 1; | |
1399 | sync(); | |
1400 | regs = *(struct pt_regs *)base; | |
1401 | sync(); | |
1402 | __delay(200); | |
1403 | } else { | |
1404 | catch_memory_errors = 0; | |
f78541dc | 1405 | printf("*** Error reading registers from "REG"\n", |
1da177e4 LT |
1406 | base); |
1407 | return; | |
1408 | } | |
1409 | catch_memory_errors = 0; | |
1410 | fp = ®s; | |
1411 | } | |
1412 | ||
f78541dc | 1413 | #ifdef CONFIG_PPC64 |
1da177e4 LT |
1414 | if (FULL_REGS(fp)) { |
1415 | for (n = 0; n < 16; ++n) | |
f78541dc | 1416 | printf("R%.2ld = "REG" R%.2ld = "REG"\n", |
1da177e4 LT |
1417 | n, fp->gpr[n], n+16, fp->gpr[n+16]); |
1418 | } else { | |
1419 | for (n = 0; n < 7; ++n) | |
f78541dc | 1420 | printf("R%.2ld = "REG" R%.2ld = "REG"\n", |
1da177e4 LT |
1421 | n, fp->gpr[n], n+7, fp->gpr[n+7]); |
1422 | } | |
f78541dc PM |
1423 | #else |
1424 | for (n = 0; n < 32; ++n) { | |
1425 | printf("R%.2d = %.8x%s", n, fp->gpr[n], | |
1426 | (n & 3) == 3? "\n": " "); | |
1427 | if (n == 12 && !FULL_REGS(fp)) { | |
1428 | printf("\n"); | |
1429 | break; | |
1430 | } | |
1431 | } | |
1432 | #endif | |
1da177e4 LT |
1433 | printf("pc = "); |
1434 | xmon_print_symbol(fp->nip, " ", "\n"); | |
1435 | printf("lr = "); | |
1436 | xmon_print_symbol(fp->link, " ", "\n"); | |
f78541dc PM |
1437 | printf("msr = "REG" cr = %.8lx\n", fp->msr, fp->ccr); |
1438 | printf("ctr = "REG" xer = "REG" trap = %4lx\n", | |
1da177e4 | 1439 | fp->ctr, fp->xer, fp->trap); |
f78541dc PM |
1440 | trap = TRAP(fp); |
1441 | if (trap == 0x300 || trap == 0x380 || trap == 0x600) | |
1442 | printf("dar = "REG" dsisr = %.8lx\n", fp->dar, fp->dsisr); | |
1da177e4 LT |
1443 | } |
1444 | ||
1445 | void cacheflush(void) | |
1446 | { | |
1447 | int cmd; | |
1448 | unsigned long nflush; | |
1449 | ||
1450 | cmd = inchar(); | |
1451 | if (cmd != 'i') | |
1452 | termch = cmd; | |
1453 | scanhex((void *)&adrs); | |
1454 | if (termch != '\n') | |
1455 | termch = 0; | |
1456 | nflush = 1; | |
1457 | scanhex(&nflush); | |
1458 | nflush = (nflush + L1_CACHE_BYTES - 1) / L1_CACHE_BYTES; | |
1459 | if (setjmp(bus_error_jmp) == 0) { | |
1460 | catch_memory_errors = 1; | |
1461 | sync(); | |
1462 | ||
1463 | if (cmd != 'i') { | |
1464 | for (; nflush > 0; --nflush, adrs += L1_CACHE_BYTES) | |
1465 | cflush((void *) adrs); | |
1466 | } else { | |
1467 | for (; nflush > 0; --nflush, adrs += L1_CACHE_BYTES) | |
1468 | cinval((void *) adrs); | |
1469 | } | |
1470 | sync(); | |
1471 | /* wait a little while to see if we get a machine check */ | |
1472 | __delay(200); | |
1473 | } | |
1474 | catch_memory_errors = 0; | |
1475 | } | |
1476 | ||
1477 | unsigned long | |
1478 | read_spr(int n) | |
1479 | { | |
1480 | unsigned int instrs[2]; | |
1481 | unsigned long (*code)(void); | |
1da177e4 | 1482 | unsigned long ret = -1UL; |
548ccebc PM |
1483 | #ifdef CONFIG_PPC64 |
1484 | unsigned long opd[3]; | |
1da177e4 | 1485 | |
1da177e4 LT |
1486 | opd[0] = (unsigned long)instrs; |
1487 | opd[1] = 0; | |
1488 | opd[2] = 0; | |
548ccebc PM |
1489 | code = (unsigned long (*)(void)) opd; |
1490 | #else | |
1491 | code = (unsigned long (*)(void)) instrs; | |
1492 | #endif | |
1493 | ||
1494 | /* mfspr r3,n; blr */ | |
1495 | instrs[0] = 0x7c6002a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6); | |
1496 | instrs[1] = 0x4e800020; | |
1da177e4 LT |
1497 | store_inst(instrs); |
1498 | store_inst(instrs+1); | |
1da177e4 LT |
1499 | |
1500 | if (setjmp(bus_error_jmp) == 0) { | |
1501 | catch_memory_errors = 1; | |
1502 | sync(); | |
1503 | ||
1504 | ret = code(); | |
1505 | ||
1506 | sync(); | |
1507 | /* wait a little while to see if we get a machine check */ | |
1508 | __delay(200); | |
1509 | n = size; | |
1510 | } | |
1511 | ||
1512 | return ret; | |
1513 | } | |
1514 | ||
1515 | void | |
1516 | write_spr(int n, unsigned long val) | |
1517 | { | |
1518 | unsigned int instrs[2]; | |
1519 | unsigned long (*code)(unsigned long); | |
548ccebc | 1520 | #ifdef CONFIG_PPC64 |
1da177e4 LT |
1521 | unsigned long opd[3]; |
1522 | ||
1da177e4 LT |
1523 | opd[0] = (unsigned long)instrs; |
1524 | opd[1] = 0; | |
1525 | opd[2] = 0; | |
548ccebc PM |
1526 | code = (unsigned long (*)(unsigned long)) opd; |
1527 | #else | |
1528 | code = (unsigned long (*)(unsigned long)) instrs; | |
1529 | #endif | |
1530 | ||
1531 | instrs[0] = 0x7c6003a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6); | |
1532 | instrs[1] = 0x4e800020; | |
1da177e4 LT |
1533 | store_inst(instrs); |
1534 | store_inst(instrs+1); | |
1da177e4 LT |
1535 | |
1536 | if (setjmp(bus_error_jmp) == 0) { | |
1537 | catch_memory_errors = 1; | |
1538 | sync(); | |
1539 | ||
1540 | code(val); | |
1541 | ||
1542 | sync(); | |
1543 | /* wait a little while to see if we get a machine check */ | |
1544 | __delay(200); | |
1545 | n = size; | |
1546 | } | |
1547 | } | |
1548 | ||
1549 | static unsigned long regno; | |
1550 | extern char exc_prolog; | |
1551 | extern char dec_exc; | |
1552 | ||
f78541dc | 1553 | void super_regs(void) |
1da177e4 LT |
1554 | { |
1555 | int cmd; | |
1556 | unsigned long val; | |
1557 | #ifdef CONFIG_PPC_ISERIES | |
1558 | struct paca_struct *ptrPaca = NULL; | |
1559 | struct lppaca *ptrLpPaca = NULL; | |
1560 | struct ItLpRegSave *ptrLpRegSave = NULL; | |
1561 | #endif | |
1562 | ||
1563 | cmd = skipbl(); | |
1564 | if (cmd == '\n') { | |
1565 | unsigned long sp, toc; | |
1566 | asm("mr %0,1" : "=r" (sp) :); | |
1567 | asm("mr %0,2" : "=r" (toc) :); | |
1568 | ||
f78541dc PM |
1569 | printf("msr = "REG" sprg0= "REG"\n", |
1570 | mfmsr(), mfspr(SPRN_SPRG0)); | |
1571 | printf("pvr = "REG" sprg1= "REG"\n", | |
1572 | mfspr(SPRN_PVR), mfspr(SPRN_SPRG1)); | |
1573 | printf("dec = "REG" sprg2= "REG"\n", | |
1574 | mfspr(SPRN_DEC), mfspr(SPRN_SPRG2)); | |
1575 | printf("sp = "REG" sprg3= "REG"\n", sp, mfspr(SPRN_SPRG3)); | |
1576 | printf("toc = "REG" dar = "REG"\n", toc, mfspr(SPRN_DAR)); | |
1da177e4 LT |
1577 | #ifdef CONFIG_PPC_ISERIES |
1578 | // Dump out relevant Paca data areas. | |
1579 | printf("Paca: \n"); | |
1580 | ptrPaca = get_paca(); | |
1581 | ||
1582 | printf(" Local Processor Control Area (LpPaca): \n"); | |
1583 | ptrLpPaca = ptrPaca->lppaca_ptr; | |
1584 | printf(" Saved Srr0=%.16lx Saved Srr1=%.16lx \n", | |
1585 | ptrLpPaca->saved_srr0, ptrLpPaca->saved_srr1); | |
1586 | printf(" Saved Gpr3=%.16lx Saved Gpr4=%.16lx \n", | |
1587 | ptrLpPaca->saved_gpr3, ptrLpPaca->saved_gpr4); | |
1588 | printf(" Saved Gpr5=%.16lx \n", ptrLpPaca->saved_gpr5); | |
1589 | ||
1590 | printf(" Local Processor Register Save Area (LpRegSave): \n"); | |
1591 | ptrLpRegSave = ptrPaca->reg_save_ptr; | |
1592 | printf(" Saved Sprg0=%.16lx Saved Sprg1=%.16lx \n", | |
1593 | ptrLpRegSave->xSPRG0, ptrLpRegSave->xSPRG0); | |
1594 | printf(" Saved Sprg2=%.16lx Saved Sprg3=%.16lx \n", | |
1595 | ptrLpRegSave->xSPRG2, ptrLpRegSave->xSPRG3); | |
1596 | printf(" Saved Msr =%.16lx Saved Nia =%.16lx \n", | |
1597 | ptrLpRegSave->xMSR, ptrLpRegSave->xNIA); | |
1598 | #endif | |
1599 | ||
1600 | return; | |
1601 | } | |
1602 | ||
1603 | scanhex(®no); | |
1604 | switch (cmd) { | |
1605 | case 'w': | |
1606 | val = read_spr(regno); | |
1607 | scanhex(&val); | |
1608 | write_spr(regno, val); | |
1609 | /* fall through */ | |
1610 | case 'r': | |
1611 | printf("spr %lx = %lx\n", regno, read_spr(regno)); | |
1612 | break; | |
1da177e4 LT |
1613 | } |
1614 | scannl(); | |
1615 | } | |
1616 | ||
1617 | /* | |
1618 | * Stuff for reading and writing memory safely | |
1619 | */ | |
1620 | int | |
1621 | mread(unsigned long adrs, void *buf, int size) | |
1622 | { | |
1623 | volatile int n; | |
1624 | char *p, *q; | |
1625 | ||
1626 | n = 0; | |
1627 | if (setjmp(bus_error_jmp) == 0) { | |
1628 | catch_memory_errors = 1; | |
1629 | sync(); | |
1630 | p = (char *)adrs; | |
1631 | q = (char *)buf; | |
1632 | switch (size) { | |
1633 | case 2: | |
f78541dc | 1634 | *(u16 *)q = *(u16 *)p; |
1da177e4 LT |
1635 | break; |
1636 | case 4: | |
f78541dc | 1637 | *(u32 *)q = *(u32 *)p; |
1da177e4 LT |
1638 | break; |
1639 | case 8: | |
f78541dc | 1640 | *(u64 *)q = *(u64 *)p; |
1da177e4 LT |
1641 | break; |
1642 | default: | |
1643 | for( ; n < size; ++n) { | |
1644 | *q++ = *p++; | |
1645 | sync(); | |
1646 | } | |
1647 | } | |
1648 | sync(); | |
1649 | /* wait a little while to see if we get a machine check */ | |
1650 | __delay(200); | |
1651 | n = size; | |
1652 | } | |
1653 | catch_memory_errors = 0; | |
1654 | return n; | |
1655 | } | |
1656 | ||
1657 | int | |
1658 | mwrite(unsigned long adrs, void *buf, int size) | |
1659 | { | |
1660 | volatile int n; | |
1661 | char *p, *q; | |
1662 | ||
1663 | n = 0; | |
1664 | if (setjmp(bus_error_jmp) == 0) { | |
1665 | catch_memory_errors = 1; | |
1666 | sync(); | |
1667 | p = (char *) adrs; | |
1668 | q = (char *) buf; | |
1669 | switch (size) { | |
1670 | case 2: | |
f78541dc | 1671 | *(u16 *)p = *(u16 *)q; |
1da177e4 LT |
1672 | break; |
1673 | case 4: | |
f78541dc | 1674 | *(u32 *)p = *(u32 *)q; |
1da177e4 LT |
1675 | break; |
1676 | case 8: | |
f78541dc | 1677 | *(u64 *)p = *(u64 *)q; |
1da177e4 LT |
1678 | break; |
1679 | default: | |
1680 | for ( ; n < size; ++n) { | |
1681 | *p++ = *q++; | |
1682 | sync(); | |
1683 | } | |
1684 | } | |
1685 | sync(); | |
1686 | /* wait a little while to see if we get a machine check */ | |
1687 | __delay(200); | |
1688 | n = size; | |
1689 | } else { | |
1690 | printf("*** Error writing address %x\n", adrs + n); | |
1691 | } | |
1692 | catch_memory_errors = 0; | |
1693 | return n; | |
1694 | } | |
1695 | ||
1696 | static int fault_type; | |
f78541dc | 1697 | static int fault_except; |
1da177e4 LT |
1698 | static char *fault_chars[] = { "--", "**", "##" }; |
1699 | ||
f78541dc | 1700 | static int handle_fault(struct pt_regs *regs) |
1da177e4 | 1701 | { |
f78541dc | 1702 | fault_except = TRAP(regs); |
1da177e4 LT |
1703 | switch (TRAP(regs)) { |
1704 | case 0x200: | |
1705 | fault_type = 0; | |
1706 | break; | |
1707 | case 0x300: | |
1708 | case 0x380: | |
1709 | fault_type = 1; | |
1710 | break; | |
1711 | default: | |
1712 | fault_type = 2; | |
1713 | } | |
1714 | ||
1715 | longjmp(bus_error_jmp, 1); | |
1716 | ||
1717 | return 0; | |
1718 | } | |
1719 | ||
1720 | #define SWAP(a, b, t) ((t) = (a), (a) = (b), (b) = (t)) | |
1721 | ||
1722 | void | |
1723 | byterev(unsigned char *val, int size) | |
1724 | { | |
1725 | int t; | |
1726 | ||
1727 | switch (size) { | |
1728 | case 2: | |
1729 | SWAP(val[0], val[1], t); | |
1730 | break; | |
1731 | case 4: | |
1732 | SWAP(val[0], val[3], t); | |
1733 | SWAP(val[1], val[2], t); | |
1734 | break; | |
1735 | case 8: /* is there really any use for this? */ | |
1736 | SWAP(val[0], val[7], t); | |
1737 | SWAP(val[1], val[6], t); | |
1738 | SWAP(val[2], val[5], t); | |
1739 | SWAP(val[3], val[4], t); | |
1740 | break; | |
1741 | } | |
1742 | } | |
1743 | ||
1744 | static int brev; | |
1745 | static int mnoread; | |
1746 | ||
1747 | static char *memex_help_string = | |
1748 | "Memory examine command usage:\n" | |
1749 | "m [addr] [flags] examine/change memory\n" | |
1750 | " addr is optional. will start where left off.\n" | |
1751 | " flags may include chars from this set:\n" | |
1752 | " b modify by bytes (default)\n" | |
1753 | " w modify by words (2 byte)\n" | |
1754 | " l modify by longs (4 byte)\n" | |
1755 | " d modify by doubleword (8 byte)\n" | |
1756 | " r toggle reverse byte order mode\n" | |
1757 | " n do not read memory (for i/o spaces)\n" | |
1758 | " . ok to read (default)\n" | |
1759 | "NOTE: flags are saved as defaults\n" | |
1760 | ""; | |
1761 | ||
1762 | static char *memex_subcmd_help_string = | |
1763 | "Memory examine subcommands:\n" | |
1764 | " hexval write this val to current location\n" | |
1765 | " 'string' write chars from string to this location\n" | |
1766 | " ' increment address\n" | |
1767 | " ^ decrement address\n" | |
1768 | " / increment addr by 0x10. //=0x100, ///=0x1000, etc\n" | |
1769 | " \\ decrement addr by 0x10. \\\\=0x100, \\\\\\=0x1000, etc\n" | |
1770 | " ` clear no-read flag\n" | |
1771 | " ; stay at this addr\n" | |
1772 | " v change to byte mode\n" | |
1773 | " w change to word (2 byte) mode\n" | |
1774 | " l change to long (4 byte) mode\n" | |
1775 | " u change to doubleword (8 byte) mode\n" | |
1776 | " m addr change current addr\n" | |
1777 | " n toggle no-read flag\n" | |
1778 | " r toggle byte reverse flag\n" | |
1779 | " < count back up count bytes\n" | |
1780 | " > count skip forward count bytes\n" | |
1781 | " x exit this mode\n" | |
1782 | ""; | |
1783 | ||
1784 | void | |
1785 | memex(void) | |
1786 | { | |
1787 | int cmd, inc, i, nslash; | |
1788 | unsigned long n; | |
1789 | unsigned char val[16]; | |
1790 | ||
1791 | scanhex((void *)&adrs); | |
1792 | cmd = skipbl(); | |
1793 | if (cmd == '?') { | |
1794 | printf(memex_help_string); | |
1795 | return; | |
1796 | } else { | |
1797 | termch = cmd; | |
1798 | } | |
1799 | last_cmd = "m\n"; | |
1800 | while ((cmd = skipbl()) != '\n') { | |
1801 | switch( cmd ){ | |
1802 | case 'b': size = 1; break; | |
1803 | case 'w': size = 2; break; | |
1804 | case 'l': size = 4; break; | |
1805 | case 'd': size = 8; break; | |
1806 | case 'r': brev = !brev; break; | |
1807 | case 'n': mnoread = 1; break; | |
1808 | case '.': mnoread = 0; break; | |
1809 | } | |
1810 | } | |
1811 | if( size <= 0 ) | |
1812 | size = 1; | |
1813 | else if( size > 8 ) | |
1814 | size = 8; | |
1815 | for(;;){ | |
1816 | if (!mnoread) | |
1817 | n = mread(adrs, val, size); | |
e1449ed9 | 1818 | printf(REG"%c", adrs, brev? 'r': ' '); |
1da177e4 LT |
1819 | if (!mnoread) { |
1820 | if (brev) | |
1821 | byterev(val, size); | |
1822 | putchar(' '); | |
1823 | for (i = 0; i < n; ++i) | |
1824 | printf("%.2x", val[i]); | |
1825 | for (; i < size; ++i) | |
1826 | printf("%s", fault_chars[fault_type]); | |
1827 | } | |
1828 | putchar(' '); | |
1829 | inc = size; | |
1830 | nslash = 0; | |
1831 | for(;;){ | |
1832 | if( scanhex(&n) ){ | |
1833 | for (i = 0; i < size; ++i) | |
1834 | val[i] = n >> (i * 8); | |
1835 | if (!brev) | |
1836 | byterev(val, size); | |
1837 | mwrite(adrs, val, size); | |
1838 | inc = size; | |
1839 | } | |
1840 | cmd = skipbl(); | |
1841 | if (cmd == '\n') | |
1842 | break; | |
1843 | inc = 0; | |
1844 | switch (cmd) { | |
1845 | case '\'': | |
1846 | for(;;){ | |
1847 | n = inchar(); | |
1848 | if( n == '\\' ) | |
1849 | n = bsesc(); | |
1850 | else if( n == '\'' ) | |
1851 | break; | |
1852 | for (i = 0; i < size; ++i) | |
1853 | val[i] = n >> (i * 8); | |
1854 | if (!brev) | |
1855 | byterev(val, size); | |
1856 | mwrite(adrs, val, size); | |
1857 | adrs += size; | |
1858 | } | |
1859 | adrs -= size; | |
1860 | inc = size; | |
1861 | break; | |
1862 | case ',': | |
1863 | adrs += size; | |
1864 | break; | |
1865 | case '.': | |
1866 | mnoread = 0; | |
1867 | break; | |
1868 | case ';': | |
1869 | break; | |
1870 | case 'x': | |
1871 | case EOF: | |
1872 | scannl(); | |
1873 | return; | |
1874 | case 'b': | |
1875 | case 'v': | |
1876 | size = 1; | |
1877 | break; | |
1878 | case 'w': | |
1879 | size = 2; | |
1880 | break; | |
1881 | case 'l': | |
1882 | size = 4; | |
1883 | break; | |
1884 | case 'u': | |
1885 | size = 8; | |
1886 | break; | |
1887 | case '^': | |
1888 | adrs -= size; | |
1889 | break; | |
1890 | break; | |
1891 | case '/': | |
1892 | if (nslash > 0) | |
1893 | adrs -= 1 << nslash; | |
1894 | else | |
1895 | nslash = 0; | |
1896 | nslash += 4; | |
1897 | adrs += 1 << nslash; | |
1898 | break; | |
1899 | case '\\': | |
1900 | if (nslash < 0) | |
1901 | adrs += 1 << -nslash; | |
1902 | else | |
1903 | nslash = 0; | |
1904 | nslash -= 4; | |
1905 | adrs -= 1 << -nslash; | |
1906 | break; | |
1907 | case 'm': | |
1908 | scanhex((void *)&adrs); | |
1909 | break; | |
1910 | case 'n': | |
1911 | mnoread = 1; | |
1912 | break; | |
1913 | case 'r': | |
1914 | brev = !brev; | |
1915 | break; | |
1916 | case '<': | |
1917 | n = size; | |
1918 | scanhex(&n); | |
1919 | adrs -= n; | |
1920 | break; | |
1921 | case '>': | |
1922 | n = size; | |
1923 | scanhex(&n); | |
1924 | adrs += n; | |
1925 | break; | |
1926 | case '?': | |
1927 | printf(memex_subcmd_help_string); | |
1928 | break; | |
1929 | } | |
1930 | } | |
1931 | adrs += inc; | |
1932 | } | |
1933 | } | |
1934 | ||
1935 | int | |
1936 | bsesc(void) | |
1937 | { | |
1938 | int c; | |
1939 | ||
1940 | c = inchar(); | |
1941 | switch( c ){ | |
1942 | case 'n': c = '\n'; break; | |
1943 | case 'r': c = '\r'; break; | |
1944 | case 'b': c = '\b'; break; | |
1945 | case 't': c = '\t'; break; | |
1946 | } | |
1947 | return c; | |
1948 | } | |
1949 | ||
7e5b5938 OH |
1950 | static void xmon_rawdump (unsigned long adrs, long ndump) |
1951 | { | |
1952 | long n, m, r, nr; | |
1953 | unsigned char temp[16]; | |
1954 | ||
1955 | for (n = ndump; n > 0;) { | |
1956 | r = n < 16? n: 16; | |
1957 | nr = mread(adrs, temp, r); | |
1958 | adrs += nr; | |
1959 | for (m = 0; m < r; ++m) { | |
1960 | if (m < nr) | |
1961 | printf("%.2x", temp[m]); | |
1962 | else | |
1963 | printf("%s", fault_chars[fault_type]); | |
1964 | } | |
1965 | n -= r; | |
1966 | if (nr < r) | |
1967 | break; | |
1968 | } | |
1969 | printf("\n"); | |
1970 | } | |
1971 | ||
1da177e4 LT |
1972 | #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ |
1973 | || ('a' <= (c) && (c) <= 'f') \ | |
1974 | || ('A' <= (c) && (c) <= 'F')) | |
1975 | void | |
1976 | dump(void) | |
1977 | { | |
1978 | int c; | |
1979 | ||
1980 | c = inchar(); | |
1981 | if ((isxdigit(c) && c != 'f' && c != 'd') || c == '\n') | |
1982 | termch = c; | |
1983 | scanhex((void *)&adrs); | |
1984 | if (termch != '\n') | |
1985 | termch = 0; | |
1986 | if (c == 'i') { | |
1987 | scanhex(&nidump); | |
1988 | if (nidump == 0) | |
1989 | nidump = 16; | |
1990 | else if (nidump > MAX_DUMP) | |
1991 | nidump = MAX_DUMP; | |
1992 | adrs += ppc_inst_dump(adrs, nidump, 1); | |
1993 | last_cmd = "di\n"; | |
7e5b5938 OH |
1994 | } else if (c == 'r') { |
1995 | scanhex(&ndump); | |
1996 | if (ndump == 0) | |
1997 | ndump = 64; | |
1998 | xmon_rawdump(adrs, ndump); | |
1999 | adrs += ndump; | |
2000 | last_cmd = "dr\n"; | |
1da177e4 LT |
2001 | } else { |
2002 | scanhex(&ndump); | |
2003 | if (ndump == 0) | |
2004 | ndump = 64; | |
2005 | else if (ndump > MAX_DUMP) | |
2006 | ndump = MAX_DUMP; | |
2007 | prdump(adrs, ndump); | |
2008 | adrs += ndump; | |
2009 | last_cmd = "d\n"; | |
2010 | } | |
2011 | } | |
2012 | ||
2013 | void | |
2014 | prdump(unsigned long adrs, long ndump) | |
2015 | { | |
2016 | long n, m, c, r, nr; | |
2017 | unsigned char temp[16]; | |
2018 | ||
2019 | for (n = ndump; n > 0;) { | |
f78541dc | 2020 | printf(REG, adrs); |
1da177e4 LT |
2021 | putchar(' '); |
2022 | r = n < 16? n: 16; | |
2023 | nr = mread(adrs, temp, r); | |
2024 | adrs += nr; | |
2025 | for (m = 0; m < r; ++m) { | |
e1449ed9 PM |
2026 | if ((m & (sizeof(long) - 1)) == 0 && m > 0) |
2027 | putchar(' '); | |
1da177e4 LT |
2028 | if (m < nr) |
2029 | printf("%.2x", temp[m]); | |
2030 | else | |
2031 | printf("%s", fault_chars[fault_type]); | |
2032 | } | |
e1449ed9 PM |
2033 | for (; m < 16; ++m) { |
2034 | if ((m & (sizeof(long) - 1)) == 0) | |
2035 | putchar(' '); | |
1da177e4 | 2036 | printf(" "); |
e1449ed9 | 2037 | } |
1da177e4 LT |
2038 | printf(" |"); |
2039 | for (m = 0; m < r; ++m) { | |
2040 | if (m < nr) { | |
2041 | c = temp[m]; | |
2042 | putchar(' ' <= c && c <= '~'? c: '.'); | |
2043 | } else | |
2044 | putchar(' '); | |
2045 | } | |
2046 | n -= r; | |
2047 | for (; m < 16; ++m) | |
2048 | putchar(' '); | |
2049 | printf("|\n"); | |
2050 | if (nr < r) | |
2051 | break; | |
2052 | } | |
2053 | } | |
2054 | ||
2055 | int | |
2056 | ppc_inst_dump(unsigned long adr, long count, int praddr) | |
2057 | { | |
2058 | int nr, dotted; | |
2059 | unsigned long first_adr; | |
2060 | unsigned long inst, last_inst = 0; | |
2061 | unsigned char val[4]; | |
2062 | ||
2063 | dotted = 0; | |
2064 | for (first_adr = adr; count > 0; --count, adr += 4) { | |
2065 | nr = mread(adr, val, 4); | |
2066 | if (nr == 0) { | |
2067 | if (praddr) { | |
2068 | const char *x = fault_chars[fault_type]; | |
f78541dc | 2069 | printf(REG" %s%s%s%s\n", adr, x, x, x, x); |
1da177e4 LT |
2070 | } |
2071 | break; | |
2072 | } | |
2073 | inst = GETWORD(val); | |
2074 | if (adr > first_adr && inst == last_inst) { | |
2075 | if (!dotted) { | |
2076 | printf(" ...\n"); | |
2077 | dotted = 1; | |
2078 | } | |
2079 | continue; | |
2080 | } | |
2081 | dotted = 0; | |
2082 | last_inst = inst; | |
2083 | if (praddr) | |
f78541dc | 2084 | printf(REG" %.8x", adr, inst); |
1da177e4 LT |
2085 | printf("\t"); |
2086 | print_insn_powerpc(inst, adr, 0); /* always returns 4 */ | |
2087 | printf("\n"); | |
2088 | } | |
2089 | return adr - first_adr; | |
2090 | } | |
2091 | ||
2092 | void | |
2093 | print_address(unsigned long addr) | |
2094 | { | |
2095 | xmon_print_symbol(addr, "\t# ", ""); | |
2096 | } | |
2097 | ||
2098 | ||
2099 | /* | |
2100 | * Memory operations - move, set, print differences | |
2101 | */ | |
2102 | static unsigned long mdest; /* destination address */ | |
2103 | static unsigned long msrc; /* source address */ | |
2104 | static unsigned long mval; /* byte value to set memory to */ | |
2105 | static unsigned long mcount; /* # bytes to affect */ | |
2106 | static unsigned long mdiffs; /* max # differences to print */ | |
2107 | ||
2108 | void | |
2109 | memops(int cmd) | |
2110 | { | |
2111 | scanhex((void *)&mdest); | |
2112 | if( termch != '\n' ) | |
2113 | termch = 0; | |
2114 | scanhex((void *)(cmd == 's'? &mval: &msrc)); | |
2115 | if( termch != '\n' ) | |
2116 | termch = 0; | |
2117 | scanhex((void *)&mcount); | |
2118 | switch( cmd ){ | |
2119 | case 'm': | |
2120 | memmove((void *)mdest, (void *)msrc, mcount); | |
2121 | break; | |
2122 | case 's': | |
2123 | memset((void *)mdest, mval, mcount); | |
2124 | break; | |
2125 | case 'd': | |
2126 | if( termch != '\n' ) | |
2127 | termch = 0; | |
2128 | scanhex((void *)&mdiffs); | |
2129 | memdiffs((unsigned char *)mdest, (unsigned char *)msrc, mcount, mdiffs); | |
2130 | break; | |
2131 | } | |
2132 | } | |
2133 | ||
2134 | void | |
2135 | memdiffs(unsigned char *p1, unsigned char *p2, unsigned nb, unsigned maxpr) | |
2136 | { | |
2137 | unsigned n, prt; | |
2138 | ||
2139 | prt = 0; | |
2140 | for( n = nb; n > 0; --n ) | |
2141 | if( *p1++ != *p2++ ) | |
2142 | if( ++prt <= maxpr ) | |
2143 | printf("%.16x %.2x # %.16x %.2x\n", p1 - 1, | |
2144 | p1[-1], p2 - 1, p2[-1]); | |
2145 | if( prt > maxpr ) | |
2146 | printf("Total of %d differences\n", prt); | |
2147 | } | |
2148 | ||
2149 | static unsigned mend; | |
2150 | static unsigned mask; | |
2151 | ||
2152 | void | |
2153 | memlocate(void) | |
2154 | { | |
2155 | unsigned a, n; | |
2156 | unsigned char val[4]; | |
2157 | ||
2158 | last_cmd = "ml"; | |
2159 | scanhex((void *)&mdest); | |
2160 | if (termch != '\n') { | |
2161 | termch = 0; | |
2162 | scanhex((void *)&mend); | |
2163 | if (termch != '\n') { | |
2164 | termch = 0; | |
2165 | scanhex((void *)&mval); | |
2166 | mask = ~0; | |
2167 | if (termch != '\n') termch = 0; | |
2168 | scanhex((void *)&mask); | |
2169 | } | |
2170 | } | |
2171 | n = 0; | |
2172 | for (a = mdest; a < mend; a += 4) { | |
2173 | if (mread(a, val, 4) == 4 | |
2174 | && ((GETWORD(val) ^ mval) & mask) == 0) { | |
2175 | printf("%.16x: %.16x\n", a, GETWORD(val)); | |
2176 | if (++n >= 10) | |
2177 | break; | |
2178 | } | |
2179 | } | |
2180 | } | |
2181 | ||
2182 | static unsigned long mskip = 0x1000; | |
2183 | static unsigned long mlim = 0xffffffff; | |
2184 | ||
2185 | void | |
2186 | memzcan(void) | |
2187 | { | |
2188 | unsigned char v; | |
2189 | unsigned a; | |
2190 | int ok, ook; | |
2191 | ||
2192 | scanhex(&mdest); | |
2193 | if (termch != '\n') termch = 0; | |
2194 | scanhex(&mskip); | |
2195 | if (termch != '\n') termch = 0; | |
2196 | scanhex(&mlim); | |
2197 | ook = 0; | |
2198 | for (a = mdest; a < mlim; a += mskip) { | |
2199 | ok = mread(a, &v, 1); | |
2200 | if (ok && !ook) { | |
2201 | printf("%.8x .. ", a); | |
1da177e4 LT |
2202 | } else if (!ok && ook) |
2203 | printf("%.8x\n", a - mskip); | |
2204 | ook = ok; | |
2205 | if (a + mskip < a) | |
2206 | break; | |
2207 | } | |
2208 | if (ook) | |
2209 | printf("%.8x\n", a - mskip); | |
2210 | } | |
2211 | ||
f78541dc PM |
2212 | void proccall(void) |
2213 | { | |
2214 | unsigned long args[8]; | |
2215 | unsigned long ret; | |
2216 | int i; | |
2217 | typedef unsigned long (*callfunc_t)(unsigned long, unsigned long, | |
2218 | unsigned long, unsigned long, unsigned long, | |
2219 | unsigned long, unsigned long, unsigned long); | |
2220 | callfunc_t func; | |
2221 | ||
2222 | if (!scanhex(&adrs)) | |
2223 | return; | |
2224 | if (termch != '\n') | |
2225 | termch = 0; | |
2226 | for (i = 0; i < 8; ++i) | |
2227 | args[i] = 0; | |
2228 | for (i = 0; i < 8; ++i) { | |
2229 | if (!scanhex(&args[i]) || termch == '\n') | |
2230 | break; | |
2231 | termch = 0; | |
2232 | } | |
2233 | func = (callfunc_t) adrs; | |
2234 | ret = 0; | |
2235 | if (setjmp(bus_error_jmp) == 0) { | |
2236 | catch_memory_errors = 1; | |
2237 | sync(); | |
2238 | ret = func(args[0], args[1], args[2], args[3], | |
2239 | args[4], args[5], args[6], args[7]); | |
2240 | sync(); | |
2241 | printf("return value is %x\n", ret); | |
2242 | } else { | |
2243 | printf("*** %x exception occurred\n", fault_except); | |
2244 | } | |
2245 | catch_memory_errors = 0; | |
2246 | } | |
2247 | ||
1da177e4 LT |
2248 | /* Input scanning routines */ |
2249 | int | |
2250 | skipbl(void) | |
2251 | { | |
2252 | int c; | |
2253 | ||
2254 | if( termch != 0 ){ | |
2255 | c = termch; | |
2256 | termch = 0; | |
2257 | } else | |
2258 | c = inchar(); | |
2259 | while( c == ' ' || c == '\t' ) | |
2260 | c = inchar(); | |
2261 | return c; | |
2262 | } | |
2263 | ||
2264 | #define N_PTREGS 44 | |
2265 | static char *regnames[N_PTREGS] = { | |
2266 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", | |
2267 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", | |
2268 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", | |
2269 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", | |
f78541dc PM |
2270 | "pc", "msr", "or3", "ctr", "lr", "xer", "ccr", |
2271 | #ifdef CONFIG_PPC64 | |
2272 | "softe", | |
2273 | #else | |
2274 | "mq", | |
2275 | #endif | |
1da177e4 LT |
2276 | "trap", "dar", "dsisr", "res" |
2277 | }; | |
2278 | ||
2279 | int | |
2280 | scanhex(unsigned long *vp) | |
2281 | { | |
2282 | int c, d; | |
2283 | unsigned long v; | |
2284 | ||
2285 | c = skipbl(); | |
2286 | if (c == '%') { | |
2287 | /* parse register name */ | |
2288 | char regname[8]; | |
2289 | int i; | |
2290 | ||
2291 | for (i = 0; i < sizeof(regname) - 1; ++i) { | |
2292 | c = inchar(); | |
2293 | if (!isalnum(c)) { | |
2294 | termch = c; | |
2295 | break; | |
2296 | } | |
2297 | regname[i] = c; | |
2298 | } | |
2299 | regname[i] = 0; | |
2300 | for (i = 0; i < N_PTREGS; ++i) { | |
2301 | if (strcmp(regnames[i], regname) == 0) { | |
2302 | if (xmon_regs == NULL) { | |
2303 | printf("regs not available\n"); | |
2304 | return 0; | |
2305 | } | |
2306 | *vp = ((unsigned long *)xmon_regs)[i]; | |
2307 | return 1; | |
2308 | } | |
2309 | } | |
2310 | printf("invalid register name '%%%s'\n", regname); | |
2311 | return 0; | |
2312 | } | |
2313 | ||
2314 | /* skip leading "0x" if any */ | |
2315 | ||
2316 | if (c == '0') { | |
2317 | c = inchar(); | |
2318 | if (c == 'x') { | |
2319 | c = inchar(); | |
2320 | } else { | |
2321 | d = hexdigit(c); | |
2322 | if (d == EOF) { | |
2323 | termch = c; | |
2324 | *vp = 0; | |
2325 | return 1; | |
2326 | } | |
2327 | } | |
2328 | } else if (c == '$') { | |
2329 | int i; | |
2330 | for (i=0; i<63; i++) { | |
2331 | c = inchar(); | |
2332 | if (isspace(c)) { | |
2333 | termch = c; | |
2334 | break; | |
2335 | } | |
2336 | tmpstr[i] = c; | |
2337 | } | |
2338 | tmpstr[i++] = 0; | |
6879dc13 BH |
2339 | *vp = 0; |
2340 | if (setjmp(bus_error_jmp) == 0) { | |
2341 | catch_memory_errors = 1; | |
2342 | sync(); | |
2343 | *vp = kallsyms_lookup_name(tmpstr); | |
2344 | sync(); | |
2345 | } | |
2346 | catch_memory_errors = 0; | |
1da177e4 LT |
2347 | if (!(*vp)) { |
2348 | printf("unknown symbol '%s'\n", tmpstr); | |
2349 | return 0; | |
2350 | } | |
2351 | return 1; | |
2352 | } | |
2353 | ||
2354 | d = hexdigit(c); | |
2355 | if (d == EOF) { | |
2356 | termch = c; | |
2357 | return 0; | |
2358 | } | |
2359 | v = 0; | |
2360 | do { | |
2361 | v = (v << 4) + d; | |
2362 | c = inchar(); | |
2363 | d = hexdigit(c); | |
2364 | } while (d != EOF); | |
2365 | termch = c; | |
2366 | *vp = v; | |
2367 | return 1; | |
2368 | } | |
2369 | ||
2370 | void | |
2371 | scannl(void) | |
2372 | { | |
2373 | int c; | |
2374 | ||
2375 | c = termch; | |
2376 | termch = 0; | |
2377 | while( c != '\n' ) | |
2378 | c = inchar(); | |
2379 | } | |
2380 | ||
f78541dc | 2381 | int hexdigit(int c) |
1da177e4 LT |
2382 | { |
2383 | if( '0' <= c && c <= '9' ) | |
2384 | return c - '0'; | |
2385 | if( 'A' <= c && c <= 'F' ) | |
2386 | return c - ('A' - 10); | |
2387 | if( 'a' <= c && c <= 'f' ) | |
2388 | return c - ('a' - 10); | |
2389 | return EOF; | |
2390 | } | |
2391 | ||
2392 | void | |
2393 | getstring(char *s, int size) | |
2394 | { | |
2395 | int c; | |
2396 | ||
2397 | c = skipbl(); | |
2398 | do { | |
2399 | if( size > 1 ){ | |
2400 | *s++ = c; | |
2401 | --size; | |
2402 | } | |
2403 | c = inchar(); | |
2404 | } while( c != ' ' && c != '\t' && c != '\n' ); | |
2405 | termch = c; | |
2406 | *s = 0; | |
2407 | } | |
2408 | ||
2409 | static char line[256]; | |
2410 | static char *lineptr; | |
2411 | ||
2412 | void | |
2413 | flush_input(void) | |
2414 | { | |
2415 | lineptr = NULL; | |
2416 | } | |
2417 | ||
2418 | int | |
2419 | inchar(void) | |
2420 | { | |
2421 | if (lineptr == NULL || *lineptr == 0) { | |
fca5dcd4 | 2422 | if (xmon_gets(line, sizeof(line)) == NULL) { |
1da177e4 LT |
2423 | lineptr = NULL; |
2424 | return EOF; | |
2425 | } | |
2426 | lineptr = line; | |
2427 | } | |
2428 | return *lineptr++; | |
2429 | } | |
2430 | ||
2431 | void | |
2432 | take_input(char *str) | |
2433 | { | |
2434 | lineptr = str; | |
2435 | } | |
2436 | ||
2437 | ||
2438 | static void | |
2439 | symbol_lookup(void) | |
2440 | { | |
2441 | int type = inchar(); | |
2442 | unsigned long addr; | |
2443 | static char tmp[64]; | |
2444 | ||
2445 | switch (type) { | |
2446 | case 'a': | |
2447 | if (scanhex(&addr)) | |
2448 | xmon_print_symbol(addr, ": ", "\n"); | |
2449 | termch = 0; | |
2450 | break; | |
2451 | case 's': | |
2452 | getstring(tmp, 64); | |
2453 | if (setjmp(bus_error_jmp) == 0) { | |
2454 | catch_memory_errors = 1; | |
2455 | sync(); | |
2456 | addr = kallsyms_lookup_name(tmp); | |
2457 | if (addr) | |
2458 | printf("%s: %lx\n", tmp, addr); | |
2459 | else | |
2460 | printf("Symbol '%s' not found.\n", tmp); | |
2461 | sync(); | |
2462 | } | |
2463 | catch_memory_errors = 0; | |
2464 | termch = 0; | |
2465 | break; | |
2466 | } | |
2467 | } | |
2468 | ||
2469 | ||
2470 | /* Print an address in numeric and symbolic form (if possible) */ | |
2471 | static void xmon_print_symbol(unsigned long address, const char *mid, | |
2472 | const char *after) | |
2473 | { | |
2474 | char *modname; | |
2475 | const char *name = NULL; | |
2476 | unsigned long offset, size; | |
2477 | ||
f78541dc | 2478 | printf(REG, address); |
1da177e4 LT |
2479 | if (setjmp(bus_error_jmp) == 0) { |
2480 | catch_memory_errors = 1; | |
2481 | sync(); | |
2482 | name = kallsyms_lookup(address, &size, &offset, &modname, | |
2483 | tmpstr); | |
2484 | sync(); | |
2485 | /* wait a little while to see if we get a machine check */ | |
2486 | __delay(200); | |
2487 | } | |
2488 | ||
2489 | catch_memory_errors = 0; | |
2490 | ||
2491 | if (name) { | |
2492 | printf("%s%s+%#lx/%#lx", mid, name, offset, size); | |
2493 | if (modname) | |
2494 | printf(" [%s]", modname); | |
2495 | } | |
2496 | printf("%s", after); | |
2497 | } | |
2498 | ||
f78541dc | 2499 | #ifdef CONFIG_PPC64 |
1da177e4 LT |
2500 | static void dump_slb(void) |
2501 | { | |
2502 | int i; | |
2503 | unsigned long tmp; | |
2504 | ||
2505 | printf("SLB contents of cpu %x\n", smp_processor_id()); | |
2506 | ||
2507 | for (i = 0; i < SLB_NUM_ENTRIES; i++) { | |
2508 | asm volatile("slbmfee %0,%1" : "=r" (tmp) : "r" (i)); | |
2509 | printf("%02d %016lx ", i, tmp); | |
2510 | ||
2511 | asm volatile("slbmfev %0,%1" : "=r" (tmp) : "r" (i)); | |
2512 | printf("%016lx\n", tmp); | |
2513 | } | |
2514 | } | |
2515 | ||
2516 | static void dump_stab(void) | |
2517 | { | |
2518 | int i; | |
2519 | unsigned long *tmp = (unsigned long *)get_paca()->stab_addr; | |
2520 | ||
2521 | printf("Segment table contents of cpu %x\n", smp_processor_id()); | |
2522 | ||
2523 | for (i = 0; i < PAGE_SIZE/16; i++) { | |
2524 | unsigned long a, b; | |
2525 | ||
2526 | a = *tmp++; | |
2527 | b = *tmp++; | |
2528 | ||
2529 | if (a || b) { | |
2530 | printf("%03d %016lx ", i, a); | |
2531 | printf("%016lx\n", b); | |
2532 | } | |
2533 | } | |
2534 | } | |
2535 | ||
f78541dc PM |
2536 | void dump_segments(void) |
2537 | { | |
2538 | if (cpu_has_feature(CPU_FTR_SLB)) | |
2539 | dump_slb(); | |
2540 | else | |
2541 | dump_stab(); | |
2542 | } | |
2543 | #endif | |
2544 | ||
2545 | #ifdef CONFIG_PPC_STD_MMU_32 | |
2546 | void dump_segments(void) | |
2547 | { | |
2548 | int i; | |
2549 | ||
2550 | printf("sr0-15 ="); | |
2551 | for (i = 0; i < 16; ++i) | |
2552 | printf(" %x", mfsrin(i)); | |
2553 | printf("\n"); | |
2554 | } | |
2555 | #endif | |
2556 | ||
b13cfd17 OH |
2557 | void xmon_init(int enable) |
2558 | { | |
2559 | if (enable) { | |
2560 | __debugger = xmon; | |
2561 | __debugger_ipi = xmon_ipi; | |
2562 | __debugger_bpt = xmon_bpt; | |
2563 | __debugger_sstep = xmon_sstep; | |
2564 | __debugger_iabr_match = xmon_iabr_match; | |
2565 | __debugger_dabr_match = xmon_dabr_match; | |
2566 | __debugger_fault_handler = xmon_fault_handler; | |
2567 | } else { | |
2568 | __debugger = NULL; | |
2569 | __debugger_ipi = NULL; | |
2570 | __debugger_bpt = NULL; | |
2571 | __debugger_sstep = NULL; | |
2572 | __debugger_iabr_match = NULL; | |
2573 | __debugger_dabr_match = NULL; | |
2574 | __debugger_fault_handler = NULL; | |
2575 | } | |
fca5dcd4 | 2576 | xmon_map_scc(); |
1da177e4 | 2577 | } |
fca5dcd4 PM |
2578 | |
2579 | #ifdef CONFIG_MAGIC_SYSRQ | |
2580 | static void sysrq_handle_xmon(int key, struct pt_regs *pt_regs, | |
2581 | struct tty_struct *tty) | |
2582 | { | |
2583 | /* ensure xmon is enabled */ | |
2584 | xmon_init(1); | |
2585 | debugger(pt_regs); | |
2586 | } | |
2587 | ||
2588 | static struct sysrq_key_op sysrq_xmon_op = | |
2589 | { | |
2590 | .handler = sysrq_handle_xmon, | |
2591 | .help_msg = "Xmon", | |
2592 | .action_msg = "Entering xmon", | |
2593 | }; | |
2594 | ||
2595 | static int __init setup_xmon_sysrq(void) | |
2596 | { | |
2597 | register_sysrq_key('x', &sysrq_xmon_op); | |
2598 | return 0; | |
2599 | } | |
2600 | __initcall(setup_xmon_sysrq); | |
2601 | #endif /* CONFIG_MAGIC_SYSRQ */ | |
47679283 ME |
2602 | |
2603 | int __initdata xmon_early, xmon_off; | |
2604 | ||
2605 | static int __init early_parse_xmon(char *p) | |
2606 | { | |
2607 | if (!p || strncmp(p, "early", 5) == 0) { | |
2608 | /* just "xmon" is equivalent to "xmon=early" */ | |
2609 | xmon_init(1); | |
2610 | xmon_early = 1; | |
2611 | } else if (strncmp(p, "on", 2) == 0) | |
2612 | xmon_init(1); | |
2613 | else if (strncmp(p, "off", 3) == 0) | |
2614 | xmon_off = 1; | |
2615 | else if (strncmp(p, "nobt", 4) == 0) | |
2616 | xmon_no_auto_backtrace = 1; | |
2617 | else | |
2618 | return 1; | |
2619 | ||
2620 | return 0; | |
2621 | } | |
2622 | early_param("xmon", early_parse_xmon); | |
2623 | ||
2624 | void __init xmon_setup(void) | |
2625 | { | |
2626 | #ifdef CONFIG_XMON_DEFAULT | |
2627 | if (!xmon_off) | |
2628 | xmon_init(1); | |
2629 | #endif | |
2630 | if (xmon_early) | |
2631 | debugger(NULL); | |
2632 | } |