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1da177e4 LT |
1 | /* |
2 | * Routines providing a simple monitor for use on the PowerMac. | |
3 | * | |
4 | * Copyright (C) 1996 Paul Mackerras. | |
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 | */ | |
11 | #include <linux/config.h> | |
12 | #include <linux/errno.h> | |
13 | #include <linux/sched.h> | |
14 | #include <linux/smp.h> | |
15 | #include <linux/mm.h> | |
16 | #include <linux/reboot.h> | |
17 | #include <linux/delay.h> | |
18 | #include <linux/kallsyms.h> | |
19 | #include <linux/cpumask.h> | |
20 | ||
21 | #include <asm/ptrace.h> | |
22 | #include <asm/string.h> | |
23 | #include <asm/prom.h> | |
24 | #include <asm/machdep.h> | |
25 | #include <asm/processor.h> | |
26 | #include <asm/pgtable.h> | |
27 | #include <asm/mmu.h> | |
28 | #include <asm/mmu_context.h> | |
29 | #include <asm/paca.h> | |
30 | #include <asm/ppcdebug.h> | |
31 | #include <asm/cputable.h> | |
32 | #include <asm/rtas.h> | |
33 | #include <asm/sstep.h> | |
34 | #include <asm/bug.h> | |
35 | #include <asm/hvcall.h> | |
36 | ||
37 | #include "nonstdio.h" | |
38 | #include "privinst.h" | |
39 | ||
40 | #define scanhex xmon_scanhex | |
41 | #define skipbl xmon_skipbl | |
42 | ||
43 | #ifdef CONFIG_SMP | |
44 | cpumask_t cpus_in_xmon = CPU_MASK_NONE; | |
45 | static unsigned long xmon_taken = 1; | |
46 | static int xmon_owner; | |
47 | static int xmon_gate; | |
48 | #endif /* CONFIG_SMP */ | |
49 | ||
50 | static unsigned long in_xmon = 0; | |
51 | ||
52 | static unsigned long adrs; | |
53 | static int size = 1; | |
54 | #define MAX_DUMP (128 * 1024) | |
55 | static unsigned long ndump = 64; | |
56 | static unsigned long nidump = 16; | |
57 | static unsigned long ncsum = 4096; | |
58 | static int termch; | |
59 | static char tmpstr[128]; | |
60 | ||
61 | #define JMP_BUF_LEN (184/sizeof(long)) | |
62 | static long bus_error_jmp[JMP_BUF_LEN]; | |
63 | static int catch_memory_errors; | |
64 | static long *xmon_fault_jmp[NR_CPUS]; | |
65 | #define setjmp xmon_setjmp | |
66 | #define longjmp xmon_longjmp | |
67 | ||
68 | /* Breakpoint stuff */ | |
69 | struct bpt { | |
70 | unsigned long address; | |
71 | unsigned int instr[2]; | |
72 | atomic_t ref_count; | |
73 | int enabled; | |
74 | unsigned long pad; | |
75 | }; | |
76 | ||
77 | /* Bits in bpt.enabled */ | |
78 | #define BP_IABR_TE 1 /* IABR translation enabled */ | |
79 | #define BP_IABR 2 | |
80 | #define BP_TRAP 8 | |
81 | #define BP_DABR 0x10 | |
82 | ||
83 | #define NBPTS 256 | |
84 | static struct bpt bpts[NBPTS]; | |
85 | static struct bpt dabr; | |
86 | static struct bpt *iabr; | |
87 | static unsigned bpinstr = 0x7fe00008; /* trap */ | |
88 | ||
89 | #define BP_NUM(bp) ((bp) - bpts + 1) | |
90 | ||
91 | /* Prototypes */ | |
92 | static int cmds(struct pt_regs *); | |
93 | static int mread(unsigned long, void *, int); | |
94 | static int mwrite(unsigned long, void *, int); | |
95 | static int handle_fault(struct pt_regs *); | |
96 | static void byterev(unsigned char *, int); | |
97 | static void memex(void); | |
98 | static int bsesc(void); | |
99 | static void dump(void); | |
100 | static void prdump(unsigned long, long); | |
101 | static int ppc_inst_dump(unsigned long, long, int); | |
102 | void print_address(unsigned long); | |
103 | static void backtrace(struct pt_regs *); | |
104 | static void excprint(struct pt_regs *); | |
105 | static void prregs(struct pt_regs *); | |
106 | static void memops(int); | |
107 | static void memlocate(void); | |
108 | static void memzcan(void); | |
109 | static void memdiffs(unsigned char *, unsigned char *, unsigned, unsigned); | |
110 | int skipbl(void); | |
111 | int scanhex(unsigned long *valp); | |
112 | static void scannl(void); | |
113 | static int hexdigit(int); | |
114 | void getstring(char *, int); | |
115 | static void flush_input(void); | |
116 | static int inchar(void); | |
117 | static void take_input(char *); | |
118 | static unsigned long read_spr(int); | |
119 | static void write_spr(int, unsigned long); | |
120 | static void super_regs(void); | |
121 | static void remove_bpts(void); | |
122 | static void insert_bpts(void); | |
123 | static void remove_cpu_bpts(void); | |
124 | static void insert_cpu_bpts(void); | |
125 | static struct bpt *at_breakpoint(unsigned long pc); | |
126 | static struct bpt *in_breakpoint_table(unsigned long pc, unsigned long *offp); | |
127 | static int do_step(struct pt_regs *); | |
128 | static void bpt_cmds(void); | |
129 | static void cacheflush(void); | |
130 | static int cpu_cmd(void); | |
131 | static void csum(void); | |
132 | static void bootcmds(void); | |
133 | void dump_segments(void); | |
134 | static void symbol_lookup(void); | |
135 | static void xmon_print_symbol(unsigned long address, const char *mid, | |
136 | const char *after); | |
137 | static const char *getvecname(unsigned long vec); | |
138 | ||
139 | static void debug_trace(void); | |
140 | ||
141 | extern int print_insn_powerpc(unsigned long, unsigned long, int); | |
142 | extern void printf(const char *fmt, ...); | |
143 | extern void xmon_vfprintf(void *f, const char *fmt, va_list ap); | |
144 | extern int xmon_putc(int c, void *f); | |
145 | extern int putchar(int ch); | |
146 | extern int xmon_read_poll(void); | |
147 | extern int setjmp(long *); | |
148 | extern void longjmp(long *, int); | |
149 | extern unsigned long _ASR; | |
150 | ||
151 | #define GETWORD(v) (((v)[0] << 24) + ((v)[1] << 16) + ((v)[2] << 8) + (v)[3]) | |
152 | ||
153 | #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ | |
154 | || ('a' <= (c) && (c) <= 'f') \ | |
155 | || ('A' <= (c) && (c) <= 'F')) | |
156 | #define isalnum(c) (('0' <= (c) && (c) <= '9') \ | |
157 | || ('a' <= (c) && (c) <= 'z') \ | |
158 | || ('A' <= (c) && (c) <= 'Z')) | |
159 | #define isspace(c) (c == ' ' || c == '\t' || c == 10 || c == 13 || c == 0) | |
160 | ||
161 | static char *help_string = "\ | |
162 | Commands:\n\ | |
163 | b show breakpoints\n\ | |
164 | bd set data breakpoint\n\ | |
165 | bi set instruction breakpoint\n\ | |
166 | bc clear breakpoint\n" | |
167 | #ifdef CONFIG_SMP | |
168 | "\ | |
169 | c print cpus stopped in xmon\n\ | |
170 | c# try to switch to cpu number h (in hex)\n" | |
171 | #endif | |
172 | "\ | |
173 | C checksum\n\ | |
174 | d dump bytes\n\ | |
175 | di dump instructions\n\ | |
176 | df dump float values\n\ | |
177 | dd dump double values\n\ | |
178 | e print exception information\n\ | |
179 | f flush cache\n\ | |
180 | la lookup symbol+offset of specified address\n\ | |
181 | ls lookup address of specified symbol\n\ | |
182 | m examine/change memory\n\ | |
183 | mm move a block of memory\n\ | |
184 | ms set a block of memory\n\ | |
185 | md compare two blocks of memory\n\ | |
186 | ml locate a block of memory\n\ | |
187 | mz zero a block of memory\n\ | |
188 | mi show information about memory allocation\n\ | |
189 | p show the task list\n\ | |
190 | r print registers\n\ | |
191 | s single step\n\ | |
192 | S print special registers\n\ | |
193 | t print backtrace\n\ | |
194 | T Enable/Disable PPCDBG flags\n\ | |
195 | x exit monitor and recover\n\ | |
196 | X exit monitor and dont recover\n\ | |
197 | u dump segment table or SLB\n\ | |
198 | ? help\n" | |
199 | "\ | |
200 | zr reboot\n\ | |
201 | zh halt\n" | |
202 | ; | |
203 | ||
204 | static struct pt_regs *xmon_regs; | |
205 | ||
206 | extern inline void sync(void) | |
207 | { | |
208 | asm volatile("sync; isync"); | |
209 | } | |
210 | ||
211 | /* (Ref: 64-bit PowerPC ELF ABI Spplement; Ian Lance Taylor, Zembu Labs). | |
212 | A PPC stack frame looks like this: | |
213 | ||
214 | High Address | |
215 | Back Chain | |
216 | FP reg save area | |
217 | GP reg save area | |
218 | Local var space | |
219 | Parameter save area (SP+48) | |
220 | TOC save area (SP+40) | |
221 | link editor doubleword (SP+32) | |
222 | compiler doubleword (SP+24) | |
223 | LR save (SP+16) | |
224 | CR save (SP+8) | |
225 | Back Chain (SP+0) | |
226 | ||
227 | Note that the LR (ret addr) may not be saved in the current frame if | |
228 | no functions have been called from the current function. | |
229 | */ | |
230 | ||
231 | /* | |
232 | * Disable surveillance (the service processor watchdog function) | |
233 | * while we are in xmon. | |
234 | * XXX we should re-enable it when we leave. :) | |
235 | */ | |
236 | #define SURVEILLANCE_TOKEN 9000 | |
237 | ||
238 | static inline void disable_surveillance(void) | |
239 | { | |
240 | #ifdef CONFIG_PPC_PSERIES | |
241 | /* Since this can't be a module, args should end up below 4GB. */ | |
242 | static struct rtas_args args; | |
243 | ||
244 | /* | |
245 | * At this point we have got all the cpus we can into | |
246 | * xmon, so there is hopefully no other cpu calling RTAS | |
247 | * at the moment, even though we don't take rtas.lock. | |
248 | * If we did try to take rtas.lock there would be a | |
249 | * real possibility of deadlock. | |
250 | */ | |
251 | args.token = rtas_token("set-indicator"); | |
252 | if (args.token == RTAS_UNKNOWN_SERVICE) | |
253 | return; | |
254 | args.nargs = 3; | |
255 | args.nret = 1; | |
256 | args.rets = &args.args[3]; | |
257 | args.args[0] = SURVEILLANCE_TOKEN; | |
258 | args.args[1] = 0; | |
259 | args.args[2] = 0; | |
260 | enter_rtas(__pa(&args)); | |
261 | #endif /* CONFIG_PPC_PSERIES */ | |
262 | } | |
263 | ||
264 | #ifdef CONFIG_SMP | |
265 | static int xmon_speaker; | |
266 | ||
267 | static void get_output_lock(void) | |
268 | { | |
269 | int me = smp_processor_id() + 0x100; | |
270 | int last_speaker = 0, prev; | |
271 | long timeout; | |
272 | ||
273 | if (xmon_speaker == me) | |
274 | return; | |
275 | for (;;) { | |
276 | if (xmon_speaker == 0) { | |
277 | last_speaker = cmpxchg(&xmon_speaker, 0, me); | |
278 | if (last_speaker == 0) | |
279 | return; | |
280 | } | |
281 | timeout = 10000000; | |
282 | while (xmon_speaker == last_speaker) { | |
283 | if (--timeout > 0) | |
284 | continue; | |
285 | /* hostile takeover */ | |
286 | prev = cmpxchg(&xmon_speaker, last_speaker, me); | |
287 | if (prev == last_speaker) | |
288 | return; | |
289 | break; | |
290 | } | |
291 | } | |
292 | } | |
293 | ||
294 | static void release_output_lock(void) | |
295 | { | |
296 | xmon_speaker = 0; | |
297 | } | |
298 | #endif | |
299 | ||
300 | int xmon_core(struct pt_regs *regs, int fromipi) | |
301 | { | |
302 | int cmd = 0; | |
303 | unsigned long msr; | |
304 | struct bpt *bp; | |
305 | long recurse_jmp[JMP_BUF_LEN]; | |
306 | unsigned long offset; | |
307 | #ifdef CONFIG_SMP | |
308 | int cpu; | |
309 | int secondary; | |
310 | unsigned long timeout; | |
311 | #endif | |
312 | ||
313 | msr = get_msr(); | |
314 | set_msrd(msr & ~MSR_EE); /* disable interrupts */ | |
315 | ||
316 | bp = in_breakpoint_table(regs->nip, &offset); | |
317 | if (bp != NULL) { | |
318 | regs->nip = bp->address + offset; | |
319 | atomic_dec(&bp->ref_count); | |
320 | } | |
321 | ||
322 | remove_cpu_bpts(); | |
323 | ||
324 | #ifdef CONFIG_SMP | |
325 | cpu = smp_processor_id(); | |
326 | if (cpu_isset(cpu, cpus_in_xmon)) { | |
327 | get_output_lock(); | |
328 | excprint(regs); | |
329 | printf("cpu 0x%x: Exception %lx %s in xmon, " | |
330 | "returning to main loop\n", | |
331 | cpu, regs->trap, getvecname(TRAP(regs))); | |
332 | longjmp(xmon_fault_jmp[cpu], 1); | |
333 | } | |
334 | ||
335 | if (setjmp(recurse_jmp) != 0) { | |
336 | if (!in_xmon || !xmon_gate) { | |
337 | printf("xmon: WARNING: bad recursive fault " | |
338 | "on cpu 0x%x\n", cpu); | |
339 | goto waiting; | |
340 | } | |
341 | secondary = !(xmon_taken && cpu == xmon_owner); | |
342 | goto cmdloop; | |
343 | } | |
344 | ||
345 | xmon_fault_jmp[cpu] = recurse_jmp; | |
346 | cpu_set(cpu, cpus_in_xmon); | |
347 | ||
348 | bp = NULL; | |
349 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) == (MSR_IR|MSR_SF)) | |
350 | bp = at_breakpoint(regs->nip); | |
351 | if (bp || (regs->msr & MSR_RI) == 0) | |
352 | fromipi = 0; | |
353 | ||
354 | if (!fromipi) { | |
355 | get_output_lock(); | |
356 | excprint(regs); | |
357 | if (bp) { | |
358 | printf("cpu 0x%x stopped at breakpoint 0x%x (", | |
359 | cpu, BP_NUM(bp)); | |
360 | xmon_print_symbol(regs->nip, " ", ")\n"); | |
361 | } | |
362 | if ((regs->msr & MSR_RI) == 0) | |
363 | printf("WARNING: exception is not recoverable, " | |
364 | "can't continue\n"); | |
365 | release_output_lock(); | |
366 | } | |
367 | ||
368 | waiting: | |
369 | secondary = 1; | |
370 | while (secondary && !xmon_gate) { | |
371 | if (in_xmon == 0) { | |
372 | if (fromipi) | |
373 | goto leave; | |
374 | secondary = test_and_set_bit(0, &in_xmon); | |
375 | } | |
376 | barrier(); | |
377 | } | |
378 | ||
379 | if (!secondary && !xmon_gate) { | |
380 | /* we are the first cpu to come in */ | |
381 | /* interrupt other cpu(s) */ | |
382 | int ncpus = num_online_cpus(); | |
383 | ||
384 | xmon_owner = cpu; | |
385 | mb(); | |
386 | if (ncpus > 1) { | |
387 | smp_send_debugger_break(MSG_ALL_BUT_SELF); | |
388 | /* wait for other cpus to come in */ | |
389 | for (timeout = 100000000; timeout != 0; --timeout) { | |
390 | if (cpus_weight(cpus_in_xmon) >= ncpus) | |
391 | break; | |
392 | barrier(); | |
393 | } | |
394 | } | |
395 | remove_bpts(); | |
396 | disable_surveillance(); | |
397 | /* for breakpoint or single step, print the current instr. */ | |
398 | if (bp || TRAP(regs) == 0xd00) | |
399 | ppc_inst_dump(regs->nip, 1, 0); | |
400 | printf("enter ? for help\n"); | |
401 | mb(); | |
402 | xmon_gate = 1; | |
403 | barrier(); | |
404 | } | |
405 | ||
406 | cmdloop: | |
407 | while (in_xmon) { | |
408 | if (secondary) { | |
409 | if (cpu == xmon_owner) { | |
410 | if (!test_and_set_bit(0, &xmon_taken)) { | |
411 | secondary = 0; | |
412 | continue; | |
413 | } | |
414 | /* missed it */ | |
415 | while (cpu == xmon_owner) | |
416 | barrier(); | |
417 | } | |
418 | barrier(); | |
419 | } else { | |
420 | cmd = cmds(regs); | |
421 | if (cmd != 0) { | |
422 | /* exiting xmon */ | |
423 | insert_bpts(); | |
424 | xmon_gate = 0; | |
425 | wmb(); | |
426 | in_xmon = 0; | |
427 | break; | |
428 | } | |
429 | /* have switched to some other cpu */ | |
430 | secondary = 1; | |
431 | } | |
432 | } | |
433 | leave: | |
434 | cpu_clear(cpu, cpus_in_xmon); | |
435 | xmon_fault_jmp[cpu] = NULL; | |
436 | ||
437 | #else | |
438 | /* UP is simple... */ | |
439 | if (in_xmon) { | |
440 | printf("Exception %lx %s in xmon, returning to main loop\n", | |
441 | regs->trap, getvecname(TRAP(regs))); | |
442 | longjmp(xmon_fault_jmp[0], 1); | |
443 | } | |
444 | if (setjmp(recurse_jmp) == 0) { | |
445 | xmon_fault_jmp[0] = recurse_jmp; | |
446 | in_xmon = 1; | |
447 | ||
448 | excprint(regs); | |
449 | bp = at_breakpoint(regs->nip); | |
450 | if (bp) { | |
451 | printf("Stopped at breakpoint %x (", BP_NUM(bp)); | |
452 | xmon_print_symbol(regs->nip, " ", ")\n"); | |
453 | } | |
454 | if ((regs->msr & MSR_RI) == 0) | |
455 | printf("WARNING: exception is not recoverable, " | |
456 | "can't continue\n"); | |
457 | remove_bpts(); | |
458 | disable_surveillance(); | |
459 | /* for breakpoint or single step, print the current instr. */ | |
460 | if (bp || TRAP(regs) == 0xd00) | |
461 | ppc_inst_dump(regs->nip, 1, 0); | |
462 | printf("enter ? for help\n"); | |
463 | } | |
464 | ||
465 | cmd = cmds(regs); | |
466 | ||
467 | insert_bpts(); | |
468 | in_xmon = 0; | |
469 | #endif | |
470 | ||
471 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) == (MSR_IR|MSR_SF)) { | |
472 | bp = at_breakpoint(regs->nip); | |
473 | if (bp != NULL) { | |
474 | int stepped = emulate_step(regs, bp->instr[0]); | |
475 | if (stepped == 0) { | |
476 | regs->nip = (unsigned long) &bp->instr[0]; | |
477 | atomic_inc(&bp->ref_count); | |
478 | } else if (stepped < 0) { | |
479 | printf("Couldn't single-step %s instruction\n", | |
480 | (IS_RFID(bp->instr[0])? "rfid": "mtmsrd")); | |
481 | } | |
482 | } | |
483 | } | |
484 | ||
485 | insert_cpu_bpts(); | |
486 | ||
487 | set_msrd(msr); /* restore interrupt enable */ | |
488 | ||
489 | return cmd != 'X'; | |
490 | } | |
491 | ||
492 | int xmon(struct pt_regs *excp) | |
493 | { | |
494 | struct pt_regs regs; | |
495 | ||
496 | if (excp == NULL) { | |
497 | /* Ok, grab regs as they are now. | |
498 | This won't do a particularily good job because the | |
499 | prologue has already been executed. | |
500 | ToDo: We could reach back into the callers save | |
501 | area to do a better job of representing the | |
502 | caller's state. | |
503 | */ | |
504 | asm volatile ("std 0,0(%0)\n\ | |
505 | std 1,8(%0)\n\ | |
506 | std 2,16(%0)\n\ | |
507 | std 3,24(%0)\n\ | |
508 | std 4,32(%0)\n\ | |
509 | std 5,40(%0)\n\ | |
510 | std 6,48(%0)\n\ | |
511 | std 7,56(%0)\n\ | |
512 | std 8,64(%0)\n\ | |
513 | std 9,72(%0)\n\ | |
514 | std 10,80(%0)\n\ | |
515 | std 11,88(%0)\n\ | |
516 | std 12,96(%0)\n\ | |
517 | std 13,104(%0)\n\ | |
518 | std 14,112(%0)\n\ | |
519 | std 15,120(%0)\n\ | |
520 | std 16,128(%0)\n\ | |
521 | std 17,136(%0)\n\ | |
522 | std 18,144(%0)\n\ | |
523 | std 19,152(%0)\n\ | |
524 | std 20,160(%0)\n\ | |
525 | std 21,168(%0)\n\ | |
526 | std 22,176(%0)\n\ | |
527 | std 23,184(%0)\n\ | |
528 | std 24,192(%0)\n\ | |
529 | std 25,200(%0)\n\ | |
530 | std 26,208(%0)\n\ | |
531 | std 27,216(%0)\n\ | |
532 | std 28,224(%0)\n\ | |
533 | std 29,232(%0)\n\ | |
534 | std 30,240(%0)\n\ | |
535 | std 31,248(%0)" : : "b" (®s)); | |
536 | ||
537 | regs.nip = regs.link = ((unsigned long *)(regs.gpr[1]))[2]; | |
538 | regs.msr = get_msr(); | |
539 | regs.ctr = get_ctr(); | |
540 | regs.xer = get_xer(); | |
541 | regs.ccr = get_cr(); | |
542 | regs.trap = 0; | |
543 | excp = ®s; | |
544 | } | |
545 | return xmon_core(excp, 0); | |
546 | } | |
547 | ||
548 | int xmon_bpt(struct pt_regs *regs) | |
549 | { | |
550 | struct bpt *bp; | |
551 | unsigned long offset; | |
552 | ||
553 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) != (MSR_IR|MSR_SF)) | |
554 | return 0; | |
555 | ||
556 | /* Are we at the trap at bp->instr[1] for some bp? */ | |
557 | bp = in_breakpoint_table(regs->nip, &offset); | |
558 | if (bp != NULL && offset == 4) { | |
559 | regs->nip = bp->address + 4; | |
560 | atomic_dec(&bp->ref_count); | |
561 | return 1; | |
562 | } | |
563 | ||
564 | /* Are we at a breakpoint? */ | |
565 | bp = at_breakpoint(regs->nip); | |
566 | if (!bp) | |
567 | return 0; | |
568 | ||
569 | xmon_core(regs, 0); | |
570 | ||
571 | return 1; | |
572 | } | |
573 | ||
574 | int xmon_sstep(struct pt_regs *regs) | |
575 | { | |
576 | if (user_mode(regs)) | |
577 | return 0; | |
578 | xmon_core(regs, 0); | |
579 | return 1; | |
580 | } | |
581 | ||
582 | int xmon_dabr_match(struct pt_regs *regs) | |
583 | { | |
584 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) != (MSR_IR|MSR_SF)) | |
585 | return 0; | |
586 | xmon_core(regs, 0); | |
587 | return 1; | |
588 | } | |
589 | ||
590 | int xmon_iabr_match(struct pt_regs *regs) | |
591 | { | |
592 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) != (MSR_IR|MSR_SF)) | |
593 | return 0; | |
594 | if (iabr == 0) | |
595 | return 0; | |
596 | xmon_core(regs, 0); | |
597 | return 1; | |
598 | } | |
599 | ||
600 | int xmon_ipi(struct pt_regs *regs) | |
601 | { | |
602 | #ifdef CONFIG_SMP | |
603 | if (in_xmon && !cpu_isset(smp_processor_id(), cpus_in_xmon)) | |
604 | xmon_core(regs, 1); | |
605 | #endif | |
606 | return 0; | |
607 | } | |
608 | ||
609 | int xmon_fault_handler(struct pt_regs *regs) | |
610 | { | |
611 | struct bpt *bp; | |
612 | unsigned long offset; | |
613 | ||
614 | if (in_xmon && catch_memory_errors) | |
615 | handle_fault(regs); /* doesn't return */ | |
616 | ||
617 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) == (MSR_IR|MSR_SF)) { | |
618 | bp = in_breakpoint_table(regs->nip, &offset); | |
619 | if (bp != NULL) { | |
620 | regs->nip = bp->address + offset; | |
621 | atomic_dec(&bp->ref_count); | |
622 | } | |
623 | } | |
624 | ||
625 | return 0; | |
626 | } | |
627 | ||
628 | /* On systems with a hypervisor, we can't set the DABR | |
629 | (data address breakpoint register) directly. */ | |
630 | static void set_controlled_dabr(unsigned long val) | |
631 | { | |
632 | #ifdef CONFIG_PPC_PSERIES | |
633 | if (systemcfg->platform == PLATFORM_PSERIES_LPAR) { | |
634 | int rc = plpar_hcall_norets(H_SET_DABR, val); | |
635 | if (rc != H_Success) | |
636 | xmon_printf("Warning: setting DABR failed (%d)\n", rc); | |
637 | } else | |
638 | #endif | |
639 | set_dabr(val); | |
640 | } | |
641 | ||
642 | static struct bpt *at_breakpoint(unsigned long pc) | |
643 | { | |
644 | int i; | |
645 | struct bpt *bp; | |
646 | ||
647 | bp = bpts; | |
648 | for (i = 0; i < NBPTS; ++i, ++bp) | |
649 | if (bp->enabled && pc == bp->address) | |
650 | return bp; | |
651 | return NULL; | |
652 | } | |
653 | ||
654 | static struct bpt *in_breakpoint_table(unsigned long nip, unsigned long *offp) | |
655 | { | |
656 | unsigned long off; | |
657 | ||
658 | off = nip - (unsigned long) bpts; | |
659 | if (off >= sizeof(bpts)) | |
660 | return NULL; | |
661 | off %= sizeof(struct bpt); | |
662 | if (off != offsetof(struct bpt, instr[0]) | |
663 | && off != offsetof(struct bpt, instr[1])) | |
664 | return NULL; | |
665 | *offp = off - offsetof(struct bpt, instr[0]); | |
666 | return (struct bpt *) (nip - off); | |
667 | } | |
668 | ||
669 | static struct bpt *new_breakpoint(unsigned long a) | |
670 | { | |
671 | struct bpt *bp; | |
672 | ||
673 | a &= ~3UL; | |
674 | bp = at_breakpoint(a); | |
675 | if (bp) | |
676 | return bp; | |
677 | ||
678 | for (bp = bpts; bp < &bpts[NBPTS]; ++bp) { | |
679 | if (!bp->enabled && atomic_read(&bp->ref_count) == 0) { | |
680 | bp->address = a; | |
681 | bp->instr[1] = bpinstr; | |
682 | store_inst(&bp->instr[1]); | |
683 | return bp; | |
684 | } | |
685 | } | |
686 | ||
687 | printf("Sorry, no free breakpoints. Please clear one first.\n"); | |
688 | return NULL; | |
689 | } | |
690 | ||
691 | static void insert_bpts(void) | |
692 | { | |
693 | int i; | |
694 | struct bpt *bp; | |
695 | ||
696 | bp = bpts; | |
697 | for (i = 0; i < NBPTS; ++i, ++bp) { | |
698 | if ((bp->enabled & (BP_TRAP|BP_IABR)) == 0) | |
699 | continue; | |
700 | if (mread(bp->address, &bp->instr[0], 4) != 4) { | |
701 | printf("Couldn't read instruction at %lx, " | |
702 | "disabling breakpoint there\n", bp->address); | |
703 | bp->enabled = 0; | |
704 | continue; | |
705 | } | |
706 | if (IS_MTMSRD(bp->instr[0]) || IS_RFID(bp->instr[0])) { | |
707 | printf("Breakpoint at %lx is on an mtmsrd or rfid " | |
708 | "instruction, disabling it\n", bp->address); | |
709 | bp->enabled = 0; | |
710 | continue; | |
711 | } | |
712 | store_inst(&bp->instr[0]); | |
713 | if (bp->enabled & BP_IABR) | |
714 | continue; | |
715 | if (mwrite(bp->address, &bpinstr, 4) != 4) { | |
716 | printf("Couldn't write instruction at %lx, " | |
717 | "disabling breakpoint there\n", bp->address); | |
718 | bp->enabled &= ~BP_TRAP; | |
719 | continue; | |
720 | } | |
721 | store_inst((void *)bp->address); | |
722 | } | |
723 | } | |
724 | ||
725 | static void insert_cpu_bpts(void) | |
726 | { | |
727 | if (dabr.enabled) | |
728 | set_controlled_dabr(dabr.address | (dabr.enabled & 7)); | |
729 | if (iabr && cpu_has_feature(CPU_FTR_IABR)) | |
730 | set_iabr(iabr->address | |
731 | | (iabr->enabled & (BP_IABR|BP_IABR_TE))); | |
732 | } | |
733 | ||
734 | static void remove_bpts(void) | |
735 | { | |
736 | int i; | |
737 | struct bpt *bp; | |
738 | unsigned instr; | |
739 | ||
740 | bp = bpts; | |
741 | for (i = 0; i < NBPTS; ++i, ++bp) { | |
742 | if ((bp->enabled & (BP_TRAP|BP_IABR)) != BP_TRAP) | |
743 | continue; | |
744 | if (mread(bp->address, &instr, 4) == 4 | |
745 | && instr == bpinstr | |
746 | && mwrite(bp->address, &bp->instr, 4) != 4) | |
747 | printf("Couldn't remove breakpoint at %lx\n", | |
748 | bp->address); | |
749 | else | |
750 | store_inst((void *)bp->address); | |
751 | } | |
752 | } | |
753 | ||
754 | static void remove_cpu_bpts(void) | |
755 | { | |
756 | set_controlled_dabr(0); | |
757 | if (cpu_has_feature(CPU_FTR_IABR)) | |
758 | set_iabr(0); | |
759 | } | |
760 | ||
761 | /* Command interpreting routine */ | |
762 | static char *last_cmd; | |
763 | ||
764 | static int | |
765 | cmds(struct pt_regs *excp) | |
766 | { | |
767 | int cmd = 0; | |
768 | ||
769 | last_cmd = NULL; | |
770 | xmon_regs = excp; | |
771 | for(;;) { | |
772 | #ifdef CONFIG_SMP | |
773 | printf("%x:", smp_processor_id()); | |
774 | #endif /* CONFIG_SMP */ | |
775 | printf("mon> "); | |
776 | fflush(stdout); | |
777 | flush_input(); | |
778 | termch = 0; | |
779 | cmd = skipbl(); | |
780 | if( cmd == '\n' ) { | |
781 | if (last_cmd == NULL) | |
782 | continue; | |
783 | take_input(last_cmd); | |
784 | last_cmd = NULL; | |
785 | cmd = inchar(); | |
786 | } | |
787 | switch (cmd) { | |
788 | case 'm': | |
789 | cmd = inchar(); | |
790 | switch (cmd) { | |
791 | case 'm': | |
792 | case 's': | |
793 | case 'd': | |
794 | memops(cmd); | |
795 | break; | |
796 | case 'l': | |
797 | memlocate(); | |
798 | break; | |
799 | case 'z': | |
800 | memzcan(); | |
801 | break; | |
802 | case 'i': | |
803 | show_mem(); | |
804 | break; | |
805 | default: | |
806 | termch = cmd; | |
807 | memex(); | |
808 | } | |
809 | break; | |
810 | case 'd': | |
811 | dump(); | |
812 | break; | |
813 | case 'l': | |
814 | symbol_lookup(); | |
815 | break; | |
816 | case 'r': | |
817 | prregs(excp); /* print regs */ | |
818 | break; | |
819 | case 'e': | |
820 | excprint(excp); | |
821 | break; | |
822 | case 'S': | |
823 | super_regs(); | |
824 | break; | |
825 | case 't': | |
826 | backtrace(excp); | |
827 | break; | |
828 | case 'f': | |
829 | cacheflush(); | |
830 | break; | |
831 | case 's': | |
832 | if (do_step(excp)) | |
833 | return cmd; | |
834 | break; | |
835 | case 'x': | |
836 | case 'X': | |
837 | case EOF: | |
838 | return cmd; | |
839 | case '?': | |
840 | printf(help_string); | |
841 | break; | |
842 | case 'p': | |
843 | show_state(); | |
844 | break; | |
845 | case 'b': | |
846 | bpt_cmds(); | |
847 | break; | |
848 | case 'C': | |
849 | csum(); | |
850 | break; | |
851 | case 'c': | |
852 | if (cpu_cmd()) | |
853 | return 0; | |
854 | break; | |
855 | case 'z': | |
856 | bootcmds(); | |
857 | break; | |
858 | case 'T': | |
859 | debug_trace(); | |
860 | break; | |
861 | case 'u': | |
862 | dump_segments(); | |
863 | break; | |
864 | default: | |
865 | printf("Unrecognized command: "); | |
866 | do { | |
867 | if (' ' < cmd && cmd <= '~') | |
868 | putchar(cmd); | |
869 | else | |
870 | printf("\\x%x", cmd); | |
871 | cmd = inchar(); | |
872 | } while (cmd != '\n'); | |
873 | printf(" (type ? for help)\n"); | |
874 | break; | |
875 | } | |
876 | } | |
877 | } | |
878 | ||
879 | /* | |
880 | * Step a single instruction. | |
881 | * Some instructions we emulate, others we execute with MSR_SE set. | |
882 | */ | |
883 | static int do_step(struct pt_regs *regs) | |
884 | { | |
885 | unsigned int instr; | |
886 | int stepped; | |
887 | ||
888 | /* check we are in 64-bit kernel mode, translation enabled */ | |
889 | if ((regs->msr & (MSR_SF|MSR_PR|MSR_IR)) == (MSR_SF|MSR_IR)) { | |
890 | if (mread(regs->nip, &instr, 4) == 4) { | |
891 | stepped = emulate_step(regs, instr); | |
892 | if (stepped < 0) { | |
893 | printf("Couldn't single-step %s instruction\n", | |
894 | (IS_RFID(instr)? "rfid": "mtmsrd")); | |
895 | return 0; | |
896 | } | |
897 | if (stepped > 0) { | |
898 | regs->trap = 0xd00 | (regs->trap & 1); | |
899 | printf("stepped to "); | |
900 | xmon_print_symbol(regs->nip, " ", "\n"); | |
901 | ppc_inst_dump(regs->nip, 1, 0); | |
902 | return 0; | |
903 | } | |
904 | } | |
905 | } | |
906 | regs->msr |= MSR_SE; | |
907 | return 1; | |
908 | } | |
909 | ||
910 | static void bootcmds(void) | |
911 | { | |
912 | int cmd; | |
913 | ||
914 | cmd = inchar(); | |
915 | if (cmd == 'r') | |
916 | ppc_md.restart(NULL); | |
917 | else if (cmd == 'h') | |
918 | ppc_md.halt(); | |
919 | else if (cmd == 'p') | |
920 | ppc_md.power_off(); | |
921 | } | |
922 | ||
923 | static int cpu_cmd(void) | |
924 | { | |
925 | #ifdef CONFIG_SMP | |
926 | unsigned long cpu; | |
927 | int timeout; | |
928 | int count; | |
929 | ||
930 | if (!scanhex(&cpu)) { | |
931 | /* print cpus waiting or in xmon */ | |
932 | printf("cpus stopped:"); | |
933 | count = 0; | |
934 | for (cpu = 0; cpu < NR_CPUS; ++cpu) { | |
935 | if (cpu_isset(cpu, cpus_in_xmon)) { | |
936 | if (count == 0) | |
937 | printf(" %x", cpu); | |
938 | ++count; | |
939 | } else { | |
940 | if (count > 1) | |
941 | printf("-%x", cpu - 1); | |
942 | count = 0; | |
943 | } | |
944 | } | |
945 | if (count > 1) | |
946 | printf("-%x", NR_CPUS - 1); | |
947 | printf("\n"); | |
948 | return 0; | |
949 | } | |
950 | /* try to switch to cpu specified */ | |
951 | if (!cpu_isset(cpu, cpus_in_xmon)) { | |
952 | printf("cpu 0x%x isn't in xmon\n", cpu); | |
953 | return 0; | |
954 | } | |
955 | xmon_taken = 0; | |
956 | mb(); | |
957 | xmon_owner = cpu; | |
958 | timeout = 10000000; | |
959 | while (!xmon_taken) { | |
960 | if (--timeout == 0) { | |
961 | if (test_and_set_bit(0, &xmon_taken)) | |
962 | break; | |
963 | /* take control back */ | |
964 | mb(); | |
965 | xmon_owner = smp_processor_id(); | |
966 | printf("cpu %u didn't take control\n", cpu); | |
967 | return 0; | |
968 | } | |
969 | barrier(); | |
970 | } | |
971 | return 1; | |
972 | #else | |
973 | return 0; | |
974 | #endif /* CONFIG_SMP */ | |
975 | } | |
976 | ||
977 | static unsigned short fcstab[256] = { | |
978 | 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, | |
979 | 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, | |
980 | 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, | |
981 | 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, | |
982 | 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, | |
983 | 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, | |
984 | 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, | |
985 | 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, | |
986 | 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, | |
987 | 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, | |
988 | 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, | |
989 | 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, | |
990 | 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, | |
991 | 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, | |
992 | 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, | |
993 | 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, | |
994 | 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, | |
995 | 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, | |
996 | 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, | |
997 | 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, | |
998 | 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, | |
999 | 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, | |
1000 | 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, | |
1001 | 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, | |
1002 | 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, | |
1003 | 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, | |
1004 | 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, | |
1005 | 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, | |
1006 | 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, | |
1007 | 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, | |
1008 | 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, | |
1009 | 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 | |
1010 | }; | |
1011 | ||
1012 | #define FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff]) | |
1013 | ||
1014 | static void | |
1015 | csum(void) | |
1016 | { | |
1017 | unsigned int i; | |
1018 | unsigned short fcs; | |
1019 | unsigned char v; | |
1020 | ||
1021 | if (!scanhex(&adrs)) | |
1022 | return; | |
1023 | if (!scanhex(&ncsum)) | |
1024 | return; | |
1025 | fcs = 0xffff; | |
1026 | for (i = 0; i < ncsum; ++i) { | |
1027 | if (mread(adrs+i, &v, 1) == 0) { | |
1028 | printf("csum stopped at %x\n", adrs+i); | |
1029 | break; | |
1030 | } | |
1031 | fcs = FCS(fcs, v); | |
1032 | } | |
1033 | printf("%x\n", fcs); | |
1034 | } | |
1035 | ||
1036 | /* | |
1037 | * Check if this is a suitable place to put a breakpoint. | |
1038 | */ | |
1039 | static long check_bp_loc(unsigned long addr) | |
1040 | { | |
1041 | unsigned int instr; | |
1042 | ||
1043 | addr &= ~3; | |
1044 | if (addr < KERNELBASE) { | |
1045 | printf("Breakpoints may only be placed at kernel addresses\n"); | |
1046 | return 0; | |
1047 | } | |
1048 | if (!mread(addr, &instr, sizeof(instr))) { | |
1049 | printf("Can't read instruction at address %lx\n", addr); | |
1050 | return 0; | |
1051 | } | |
1052 | if (IS_MTMSRD(instr) || IS_RFID(instr)) { | |
1053 | printf("Breakpoints may not be placed on mtmsrd or rfid " | |
1054 | "instructions\n"); | |
1055 | return 0; | |
1056 | } | |
1057 | return 1; | |
1058 | } | |
1059 | ||
1060 | static char *breakpoint_help_string = | |
1061 | "Breakpoint command usage:\n" | |
1062 | "b show breakpoints\n" | |
1063 | "b <addr> [cnt] set breakpoint at given instr addr\n" | |
1064 | "bc clear all breakpoints\n" | |
1065 | "bc <n/addr> clear breakpoint number n or at addr\n" | |
1066 | "bi <addr> [cnt] set hardware instr breakpoint (POWER3/RS64 only)\n" | |
1067 | "bd <addr> [cnt] set hardware data breakpoint\n" | |
1068 | ""; | |
1069 | ||
1070 | static void | |
1071 | bpt_cmds(void) | |
1072 | { | |
1073 | int cmd; | |
1074 | unsigned long a; | |
1075 | int mode, i; | |
1076 | struct bpt *bp; | |
1077 | const char badaddr[] = "Only kernel addresses are permitted " | |
1078 | "for breakpoints\n"; | |
1079 | ||
1080 | cmd = inchar(); | |
1081 | switch (cmd) { | |
1082 | case 'd': /* bd - hardware data breakpoint */ | |
1083 | mode = 7; | |
1084 | cmd = inchar(); | |
1085 | if (cmd == 'r') | |
1086 | mode = 5; | |
1087 | else if (cmd == 'w') | |
1088 | mode = 6; | |
1089 | else | |
1090 | termch = cmd; | |
1091 | dabr.address = 0; | |
1092 | dabr.enabled = 0; | |
1093 | if (scanhex(&dabr.address)) { | |
1094 | if (dabr.address < KERNELBASE) { | |
1095 | printf(badaddr); | |
1096 | break; | |
1097 | } | |
1098 | dabr.address &= ~7; | |
1099 | dabr.enabled = mode | BP_DABR; | |
1100 | } | |
1101 | break; | |
1102 | ||
1103 | case 'i': /* bi - hardware instr breakpoint */ | |
1104 | if (!cpu_has_feature(CPU_FTR_IABR)) { | |
1105 | printf("Hardware instruction breakpoint " | |
1106 | "not supported on this cpu\n"); | |
1107 | break; | |
1108 | } | |
1109 | if (iabr) { | |
1110 | iabr->enabled &= ~(BP_IABR | BP_IABR_TE); | |
1111 | iabr = NULL; | |
1112 | } | |
1113 | if (!scanhex(&a)) | |
1114 | break; | |
1115 | if (!check_bp_loc(a)) | |
1116 | break; | |
1117 | bp = new_breakpoint(a); | |
1118 | if (bp != NULL) { | |
1119 | bp->enabled |= BP_IABR | BP_IABR_TE; | |
1120 | iabr = bp; | |
1121 | } | |
1122 | break; | |
1123 | ||
1124 | case 'c': | |
1125 | if (!scanhex(&a)) { | |
1126 | /* clear all breakpoints */ | |
1127 | for (i = 0; i < NBPTS; ++i) | |
1128 | bpts[i].enabled = 0; | |
1129 | iabr = NULL; | |
1130 | dabr.enabled = 0; | |
1131 | printf("All breakpoints cleared\n"); | |
1132 | break; | |
1133 | } | |
1134 | ||
1135 | if (a <= NBPTS && a >= 1) { | |
1136 | /* assume a breakpoint number */ | |
1137 | bp = &bpts[a-1]; /* bp nums are 1 based */ | |
1138 | } else { | |
1139 | /* assume a breakpoint address */ | |
1140 | bp = at_breakpoint(a); | |
1141 | if (bp == 0) { | |
1142 | printf("No breakpoint at %x\n", a); | |
1143 | break; | |
1144 | } | |
1145 | } | |
1146 | ||
1147 | printf("Cleared breakpoint %x (", BP_NUM(bp)); | |
1148 | xmon_print_symbol(bp->address, " ", ")\n"); | |
1149 | bp->enabled = 0; | |
1150 | break; | |
1151 | ||
1152 | default: | |
1153 | termch = cmd; | |
1154 | cmd = skipbl(); | |
1155 | if (cmd == '?') { | |
1156 | printf(breakpoint_help_string); | |
1157 | break; | |
1158 | } | |
1159 | termch = cmd; | |
1160 | if (!scanhex(&a)) { | |
1161 | /* print all breakpoints */ | |
1162 | printf(" type address\n"); | |
1163 | if (dabr.enabled) { | |
1164 | printf(" data %.16lx [", dabr.address); | |
1165 | if (dabr.enabled & 1) | |
1166 | printf("r"); | |
1167 | if (dabr.enabled & 2) | |
1168 | printf("w"); | |
1169 | printf("]\n"); | |
1170 | } | |
1171 | for (bp = bpts; bp < &bpts[NBPTS]; ++bp) { | |
1172 | if (!bp->enabled) | |
1173 | continue; | |
1174 | printf("%2x %s ", BP_NUM(bp), | |
1175 | (bp->enabled & BP_IABR)? "inst": "trap"); | |
1176 | xmon_print_symbol(bp->address, " ", "\n"); | |
1177 | } | |
1178 | break; | |
1179 | } | |
1180 | ||
1181 | if (!check_bp_loc(a)) | |
1182 | break; | |
1183 | bp = new_breakpoint(a); | |
1184 | if (bp != NULL) | |
1185 | bp->enabled |= BP_TRAP; | |
1186 | break; | |
1187 | } | |
1188 | } | |
1189 | ||
1190 | /* Very cheap human name for vector lookup. */ | |
1191 | static | |
1192 | const char *getvecname(unsigned long vec) | |
1193 | { | |
1194 | char *ret; | |
1195 | ||
1196 | switch (vec) { | |
1197 | case 0x100: ret = "(System Reset)"; break; | |
1198 | case 0x200: ret = "(Machine Check)"; break; | |
1199 | case 0x300: ret = "(Data Access)"; break; | |
1200 | case 0x380: ret = "(Data SLB Access)"; break; | |
1201 | case 0x400: ret = "(Instruction Access)"; break; | |
1202 | case 0x480: ret = "(Instruction SLB Access)"; break; | |
1203 | case 0x500: ret = "(Hardware Interrupt)"; break; | |
1204 | case 0x600: ret = "(Alignment)"; break; | |
1205 | case 0x700: ret = "(Program Check)"; break; | |
1206 | case 0x800: ret = "(FPU Unavailable)"; break; | |
1207 | case 0x900: ret = "(Decrementer)"; break; | |
1208 | case 0xc00: ret = "(System Call)"; break; | |
1209 | case 0xd00: ret = "(Single Step)"; break; | |
1210 | case 0xf00: ret = "(Performance Monitor)"; break; | |
1211 | case 0xf20: ret = "(Altivec Unavailable)"; break; | |
1212 | case 0x1300: ret = "(Instruction Breakpoint)"; break; | |
1213 | default: ret = ""; | |
1214 | } | |
1215 | return ret; | |
1216 | } | |
1217 | ||
1218 | static void get_function_bounds(unsigned long pc, unsigned long *startp, | |
1219 | unsigned long *endp) | |
1220 | { | |
1221 | unsigned long size, offset; | |
1222 | const char *name; | |
1223 | char *modname; | |
1224 | ||
1225 | *startp = *endp = 0; | |
1226 | if (pc == 0) | |
1227 | return; | |
1228 | if (setjmp(bus_error_jmp) == 0) { | |
1229 | catch_memory_errors = 1; | |
1230 | sync(); | |
1231 | name = kallsyms_lookup(pc, &size, &offset, &modname, tmpstr); | |
1232 | if (name != NULL) { | |
1233 | *startp = pc - offset; | |
1234 | *endp = pc - offset + size; | |
1235 | } | |
1236 | sync(); | |
1237 | } | |
1238 | catch_memory_errors = 0; | |
1239 | } | |
1240 | ||
1241 | static int xmon_depth_to_print = 64; | |
1242 | ||
1243 | static void xmon_show_stack(unsigned long sp, unsigned long lr, | |
1244 | unsigned long pc) | |
1245 | { | |
1246 | unsigned long ip; | |
1247 | unsigned long newsp; | |
1248 | unsigned long marker; | |
1249 | int count = 0; | |
1250 | struct pt_regs regs; | |
1251 | ||
1252 | do { | |
1253 | if (sp < PAGE_OFFSET) { | |
1254 | if (sp != 0) | |
1255 | printf("SP (%lx) is in userspace\n", sp); | |
1256 | break; | |
1257 | } | |
1258 | ||
1259 | if (!mread(sp + 16, &ip, sizeof(unsigned long)) | |
1260 | || !mread(sp, &newsp, sizeof(unsigned long))) { | |
1261 | printf("Couldn't read stack frame at %lx\n", sp); | |
1262 | break; | |
1263 | } | |
1264 | ||
1265 | /* | |
1266 | * For the first stack frame, try to work out if | |
1267 | * LR and/or the saved LR value in the bottommost | |
1268 | * stack frame are valid. | |
1269 | */ | |
1270 | if ((pc | lr) != 0) { | |
1271 | unsigned long fnstart, fnend; | |
1272 | unsigned long nextip; | |
1273 | int printip = 1; | |
1274 | ||
1275 | get_function_bounds(pc, &fnstart, &fnend); | |
1276 | nextip = 0; | |
1277 | if (newsp > sp) | |
1278 | mread(newsp + 16, &nextip, | |
1279 | sizeof(unsigned long)); | |
1280 | if (lr == ip) { | |
1281 | if (lr < PAGE_OFFSET | |
1282 | || (fnstart <= lr && lr < fnend)) | |
1283 | printip = 0; | |
1284 | } else if (lr == nextip) { | |
1285 | printip = 0; | |
1286 | } else if (lr >= PAGE_OFFSET | |
1287 | && !(fnstart <= lr && lr < fnend)) { | |
1288 | printf("[link register ] "); | |
1289 | xmon_print_symbol(lr, " ", "\n"); | |
1290 | } | |
1291 | if (printip) { | |
1292 | printf("[%.16lx] ", sp); | |
1293 | xmon_print_symbol(ip, " ", " (unreliable)\n"); | |
1294 | } | |
1295 | pc = lr = 0; | |
1296 | ||
1297 | } else { | |
1298 | printf("[%.16lx] ", sp); | |
1299 | xmon_print_symbol(ip, " ", "\n"); | |
1300 | } | |
1301 | ||
1302 | /* Look for "regshere" marker to see if this is | |
1303 | an exception frame. */ | |
1304 | if (mread(sp + 0x60, &marker, sizeof(unsigned long)) | |
1305 | && marker == 0x7265677368657265ul) { | |
1306 | if (mread(sp + 0x70, ®s, sizeof(regs)) | |
1307 | != sizeof(regs)) { | |
1308 | printf("Couldn't read registers at %lx\n", | |
1309 | sp + 0x70); | |
1310 | break; | |
1311 | } | |
1312 | printf("--- Exception: %lx %s at ", regs.trap, | |
1313 | getvecname(TRAP(®s))); | |
1314 | pc = regs.nip; | |
1315 | lr = regs.link; | |
1316 | xmon_print_symbol(pc, " ", "\n"); | |
1317 | } | |
1318 | ||
1319 | if (newsp == 0) | |
1320 | break; | |
1321 | ||
1322 | sp = newsp; | |
1323 | } while (count++ < xmon_depth_to_print); | |
1324 | } | |
1325 | ||
1326 | static void backtrace(struct pt_regs *excp) | |
1327 | { | |
1328 | unsigned long sp; | |
1329 | ||
1330 | if (scanhex(&sp)) | |
1331 | xmon_show_stack(sp, 0, 0); | |
1332 | else | |
1333 | xmon_show_stack(excp->gpr[1], excp->link, excp->nip); | |
1334 | scannl(); | |
1335 | } | |
1336 | ||
1337 | static void print_bug_trap(struct pt_regs *regs) | |
1338 | { | |
1339 | struct bug_entry *bug; | |
1340 | unsigned long addr; | |
1341 | ||
1342 | if (regs->msr & MSR_PR) | |
1343 | return; /* not in kernel */ | |
1344 | addr = regs->nip; /* address of trap instruction */ | |
1345 | if (addr < PAGE_OFFSET) | |
1346 | return; | |
1347 | bug = find_bug(regs->nip); | |
1348 | if (bug == NULL) | |
1349 | return; | |
1350 | if (bug->line & BUG_WARNING_TRAP) | |
1351 | return; | |
1352 | ||
1353 | printf("kernel BUG in %s at %s:%d!\n", | |
1354 | bug->function, bug->file, (unsigned int)bug->line); | |
1355 | } | |
1356 | ||
1357 | void excprint(struct pt_regs *fp) | |
1358 | { | |
1359 | unsigned long trap; | |
1360 | ||
1361 | #ifdef CONFIG_SMP | |
1362 | printf("cpu 0x%x: ", smp_processor_id()); | |
1363 | #endif /* CONFIG_SMP */ | |
1364 | ||
1365 | trap = TRAP(fp); | |
1366 | printf("Vector: %lx %s at [%lx]\n", fp->trap, getvecname(trap), fp); | |
1367 | printf(" pc: "); | |
1368 | xmon_print_symbol(fp->nip, ": ", "\n"); | |
1369 | ||
1370 | printf(" lr: ", fp->link); | |
1371 | xmon_print_symbol(fp->link, ": ", "\n"); | |
1372 | ||
1373 | printf(" sp: %lx\n", fp->gpr[1]); | |
1374 | printf(" msr: %lx\n", fp->msr); | |
1375 | ||
1376 | if (trap == 0x300 || trap == 0x380 || trap == 0x600) { | |
1377 | printf(" dar: %lx\n", fp->dar); | |
1378 | if (trap != 0x380) | |
1379 | printf(" dsisr: %lx\n", fp->dsisr); | |
1380 | } | |
1381 | ||
1382 | printf(" current = 0x%lx\n", current); | |
1383 | printf(" paca = 0x%lx\n", get_paca()); | |
1384 | if (current) { | |
1385 | printf(" pid = %ld, comm = %s\n", | |
1386 | current->pid, current->comm); | |
1387 | } | |
1388 | ||
1389 | if (trap == 0x700) | |
1390 | print_bug_trap(fp); | |
1391 | } | |
1392 | ||
1393 | void prregs(struct pt_regs *fp) | |
1394 | { | |
1395 | int n; | |
1396 | unsigned long base; | |
1397 | struct pt_regs regs; | |
1398 | ||
1399 | if (scanhex(&base)) { | |
1400 | if (setjmp(bus_error_jmp) == 0) { | |
1401 | catch_memory_errors = 1; | |
1402 | sync(); | |
1403 | regs = *(struct pt_regs *)base; | |
1404 | sync(); | |
1405 | __delay(200); | |
1406 | } else { | |
1407 | catch_memory_errors = 0; | |
1408 | printf("*** Error reading registers from %.16lx\n", | |
1409 | base); | |
1410 | return; | |
1411 | } | |
1412 | catch_memory_errors = 0; | |
1413 | fp = ®s; | |
1414 | } | |
1415 | ||
1416 | if (FULL_REGS(fp)) { | |
1417 | for (n = 0; n < 16; ++n) | |
1418 | printf("R%.2ld = %.16lx R%.2ld = %.16lx\n", | |
1419 | n, fp->gpr[n], n+16, fp->gpr[n+16]); | |
1420 | } else { | |
1421 | for (n = 0; n < 7; ++n) | |
1422 | printf("R%.2ld = %.16lx R%.2ld = %.16lx\n", | |
1423 | n, fp->gpr[n], n+7, fp->gpr[n+7]); | |
1424 | } | |
1425 | printf("pc = "); | |
1426 | xmon_print_symbol(fp->nip, " ", "\n"); | |
1427 | printf("lr = "); | |
1428 | xmon_print_symbol(fp->link, " ", "\n"); | |
1429 | printf("msr = %.16lx cr = %.8lx\n", fp->msr, fp->ccr); | |
1430 | printf("ctr = %.16lx xer = %.16lx trap = %8lx\n", | |
1431 | fp->ctr, fp->xer, fp->trap); | |
1432 | } | |
1433 | ||
1434 | void cacheflush(void) | |
1435 | { | |
1436 | int cmd; | |
1437 | unsigned long nflush; | |
1438 | ||
1439 | cmd = inchar(); | |
1440 | if (cmd != 'i') | |
1441 | termch = cmd; | |
1442 | scanhex((void *)&adrs); | |
1443 | if (termch != '\n') | |
1444 | termch = 0; | |
1445 | nflush = 1; | |
1446 | scanhex(&nflush); | |
1447 | nflush = (nflush + L1_CACHE_BYTES - 1) / L1_CACHE_BYTES; | |
1448 | if (setjmp(bus_error_jmp) == 0) { | |
1449 | catch_memory_errors = 1; | |
1450 | sync(); | |
1451 | ||
1452 | if (cmd != 'i') { | |
1453 | for (; nflush > 0; --nflush, adrs += L1_CACHE_BYTES) | |
1454 | cflush((void *) adrs); | |
1455 | } else { | |
1456 | for (; nflush > 0; --nflush, adrs += L1_CACHE_BYTES) | |
1457 | cinval((void *) adrs); | |
1458 | } | |
1459 | sync(); | |
1460 | /* wait a little while to see if we get a machine check */ | |
1461 | __delay(200); | |
1462 | } | |
1463 | catch_memory_errors = 0; | |
1464 | } | |
1465 | ||
1466 | unsigned long | |
1467 | read_spr(int n) | |
1468 | { | |
1469 | unsigned int instrs[2]; | |
1470 | unsigned long (*code)(void); | |
1471 | unsigned long opd[3]; | |
1472 | unsigned long ret = -1UL; | |
1473 | ||
1474 | instrs[0] = 0x7c6002a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6); | |
1475 | instrs[1] = 0x4e800020; | |
1476 | opd[0] = (unsigned long)instrs; | |
1477 | opd[1] = 0; | |
1478 | opd[2] = 0; | |
1479 | store_inst(instrs); | |
1480 | store_inst(instrs+1); | |
1481 | code = (unsigned long (*)(void)) opd; | |
1482 | ||
1483 | if (setjmp(bus_error_jmp) == 0) { | |
1484 | catch_memory_errors = 1; | |
1485 | sync(); | |
1486 | ||
1487 | ret = code(); | |
1488 | ||
1489 | sync(); | |
1490 | /* wait a little while to see if we get a machine check */ | |
1491 | __delay(200); | |
1492 | n = size; | |
1493 | } | |
1494 | ||
1495 | return ret; | |
1496 | } | |
1497 | ||
1498 | void | |
1499 | write_spr(int n, unsigned long val) | |
1500 | { | |
1501 | unsigned int instrs[2]; | |
1502 | unsigned long (*code)(unsigned long); | |
1503 | unsigned long opd[3]; | |
1504 | ||
1505 | instrs[0] = 0x7c6003a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6); | |
1506 | instrs[1] = 0x4e800020; | |
1507 | opd[0] = (unsigned long)instrs; | |
1508 | opd[1] = 0; | |
1509 | opd[2] = 0; | |
1510 | store_inst(instrs); | |
1511 | store_inst(instrs+1); | |
1512 | code = (unsigned long (*)(unsigned long)) opd; | |
1513 | ||
1514 | if (setjmp(bus_error_jmp) == 0) { | |
1515 | catch_memory_errors = 1; | |
1516 | sync(); | |
1517 | ||
1518 | code(val); | |
1519 | ||
1520 | sync(); | |
1521 | /* wait a little while to see if we get a machine check */ | |
1522 | __delay(200); | |
1523 | n = size; | |
1524 | } | |
1525 | } | |
1526 | ||
1527 | static unsigned long regno; | |
1528 | extern char exc_prolog; | |
1529 | extern char dec_exc; | |
1530 | ||
1531 | void | |
1532 | super_regs(void) | |
1533 | { | |
1534 | int cmd; | |
1535 | unsigned long val; | |
1536 | #ifdef CONFIG_PPC_ISERIES | |
1537 | struct paca_struct *ptrPaca = NULL; | |
1538 | struct lppaca *ptrLpPaca = NULL; | |
1539 | struct ItLpRegSave *ptrLpRegSave = NULL; | |
1540 | #endif | |
1541 | ||
1542 | cmd = skipbl(); | |
1543 | if (cmd == '\n') { | |
1544 | unsigned long sp, toc; | |
1545 | asm("mr %0,1" : "=r" (sp) :); | |
1546 | asm("mr %0,2" : "=r" (toc) :); | |
1547 | ||
1548 | printf("msr = %.16lx sprg0= %.16lx\n", get_msr(), get_sprg0()); | |
1549 | printf("pvr = %.16lx sprg1= %.16lx\n", get_pvr(), get_sprg1()); | |
1550 | printf("dec = %.16lx sprg2= %.16lx\n", get_dec(), get_sprg2()); | |
1551 | printf("sp = %.16lx sprg3= %.16lx\n", sp, get_sprg3()); | |
1552 | printf("toc = %.16lx dar = %.16lx\n", toc, get_dar()); | |
1553 | printf("srr0 = %.16lx srr1 = %.16lx\n", get_srr0(), get_srr1()); | |
1554 | #ifdef CONFIG_PPC_ISERIES | |
1555 | // Dump out relevant Paca data areas. | |
1556 | printf("Paca: \n"); | |
1557 | ptrPaca = get_paca(); | |
1558 | ||
1559 | printf(" Local Processor Control Area (LpPaca): \n"); | |
1560 | ptrLpPaca = ptrPaca->lppaca_ptr; | |
1561 | printf(" Saved Srr0=%.16lx Saved Srr1=%.16lx \n", | |
1562 | ptrLpPaca->saved_srr0, ptrLpPaca->saved_srr1); | |
1563 | printf(" Saved Gpr3=%.16lx Saved Gpr4=%.16lx \n", | |
1564 | ptrLpPaca->saved_gpr3, ptrLpPaca->saved_gpr4); | |
1565 | printf(" Saved Gpr5=%.16lx \n", ptrLpPaca->saved_gpr5); | |
1566 | ||
1567 | printf(" Local Processor Register Save Area (LpRegSave): \n"); | |
1568 | ptrLpRegSave = ptrPaca->reg_save_ptr; | |
1569 | printf(" Saved Sprg0=%.16lx Saved Sprg1=%.16lx \n", | |
1570 | ptrLpRegSave->xSPRG0, ptrLpRegSave->xSPRG0); | |
1571 | printf(" Saved Sprg2=%.16lx Saved Sprg3=%.16lx \n", | |
1572 | ptrLpRegSave->xSPRG2, ptrLpRegSave->xSPRG3); | |
1573 | printf(" Saved Msr =%.16lx Saved Nia =%.16lx \n", | |
1574 | ptrLpRegSave->xMSR, ptrLpRegSave->xNIA); | |
1575 | #endif | |
1576 | ||
1577 | return; | |
1578 | } | |
1579 | ||
1580 | scanhex(®no); | |
1581 | switch (cmd) { | |
1582 | case 'w': | |
1583 | val = read_spr(regno); | |
1584 | scanhex(&val); | |
1585 | write_spr(regno, val); | |
1586 | /* fall through */ | |
1587 | case 'r': | |
1588 | printf("spr %lx = %lx\n", regno, read_spr(regno)); | |
1589 | break; | |
1590 | case 'm': | |
1591 | val = get_msr(); | |
1592 | scanhex(&val); | |
1593 | set_msrd(val); | |
1594 | break; | |
1595 | } | |
1596 | scannl(); | |
1597 | } | |
1598 | ||
1599 | /* | |
1600 | * Stuff for reading and writing memory safely | |
1601 | */ | |
1602 | int | |
1603 | mread(unsigned long adrs, void *buf, int size) | |
1604 | { | |
1605 | volatile int n; | |
1606 | char *p, *q; | |
1607 | ||
1608 | n = 0; | |
1609 | if (setjmp(bus_error_jmp) == 0) { | |
1610 | catch_memory_errors = 1; | |
1611 | sync(); | |
1612 | p = (char *)adrs; | |
1613 | q = (char *)buf; | |
1614 | switch (size) { | |
1615 | case 2: | |
1616 | *(short *)q = *(short *)p; | |
1617 | break; | |
1618 | case 4: | |
1619 | *(int *)q = *(int *)p; | |
1620 | break; | |
1621 | case 8: | |
1622 | *(long *)q = *(long *)p; | |
1623 | break; | |
1624 | default: | |
1625 | for( ; n < size; ++n) { | |
1626 | *q++ = *p++; | |
1627 | sync(); | |
1628 | } | |
1629 | } | |
1630 | sync(); | |
1631 | /* wait a little while to see if we get a machine check */ | |
1632 | __delay(200); | |
1633 | n = size; | |
1634 | } | |
1635 | catch_memory_errors = 0; | |
1636 | return n; | |
1637 | } | |
1638 | ||
1639 | int | |
1640 | mwrite(unsigned long adrs, void *buf, int size) | |
1641 | { | |
1642 | volatile int n; | |
1643 | char *p, *q; | |
1644 | ||
1645 | n = 0; | |
1646 | if (setjmp(bus_error_jmp) == 0) { | |
1647 | catch_memory_errors = 1; | |
1648 | sync(); | |
1649 | p = (char *) adrs; | |
1650 | q = (char *) buf; | |
1651 | switch (size) { | |
1652 | case 2: | |
1653 | *(short *)p = *(short *)q; | |
1654 | break; | |
1655 | case 4: | |
1656 | *(int *)p = *(int *)q; | |
1657 | break; | |
1658 | case 8: | |
1659 | *(long *)p = *(long *)q; | |
1660 | break; | |
1661 | default: | |
1662 | for ( ; n < size; ++n) { | |
1663 | *p++ = *q++; | |
1664 | sync(); | |
1665 | } | |
1666 | } | |
1667 | sync(); | |
1668 | /* wait a little while to see if we get a machine check */ | |
1669 | __delay(200); | |
1670 | n = size; | |
1671 | } else { | |
1672 | printf("*** Error writing address %x\n", adrs + n); | |
1673 | } | |
1674 | catch_memory_errors = 0; | |
1675 | return n; | |
1676 | } | |
1677 | ||
1678 | static int fault_type; | |
1679 | static char *fault_chars[] = { "--", "**", "##" }; | |
1680 | ||
1681 | static int | |
1682 | handle_fault(struct pt_regs *regs) | |
1683 | { | |
1684 | switch (TRAP(regs)) { | |
1685 | case 0x200: | |
1686 | fault_type = 0; | |
1687 | break; | |
1688 | case 0x300: | |
1689 | case 0x380: | |
1690 | fault_type = 1; | |
1691 | break; | |
1692 | default: | |
1693 | fault_type = 2; | |
1694 | } | |
1695 | ||
1696 | longjmp(bus_error_jmp, 1); | |
1697 | ||
1698 | return 0; | |
1699 | } | |
1700 | ||
1701 | #define SWAP(a, b, t) ((t) = (a), (a) = (b), (b) = (t)) | |
1702 | ||
1703 | void | |
1704 | byterev(unsigned char *val, int size) | |
1705 | { | |
1706 | int t; | |
1707 | ||
1708 | switch (size) { | |
1709 | case 2: | |
1710 | SWAP(val[0], val[1], t); | |
1711 | break; | |
1712 | case 4: | |
1713 | SWAP(val[0], val[3], t); | |
1714 | SWAP(val[1], val[2], t); | |
1715 | break; | |
1716 | case 8: /* is there really any use for this? */ | |
1717 | SWAP(val[0], val[7], t); | |
1718 | SWAP(val[1], val[6], t); | |
1719 | SWAP(val[2], val[5], t); | |
1720 | SWAP(val[3], val[4], t); | |
1721 | break; | |
1722 | } | |
1723 | } | |
1724 | ||
1725 | static int brev; | |
1726 | static int mnoread; | |
1727 | ||
1728 | static char *memex_help_string = | |
1729 | "Memory examine command usage:\n" | |
1730 | "m [addr] [flags] examine/change memory\n" | |
1731 | " addr is optional. will start where left off.\n" | |
1732 | " flags may include chars from this set:\n" | |
1733 | " b modify by bytes (default)\n" | |
1734 | " w modify by words (2 byte)\n" | |
1735 | " l modify by longs (4 byte)\n" | |
1736 | " d modify by doubleword (8 byte)\n" | |
1737 | " r toggle reverse byte order mode\n" | |
1738 | " n do not read memory (for i/o spaces)\n" | |
1739 | " . ok to read (default)\n" | |
1740 | "NOTE: flags are saved as defaults\n" | |
1741 | ""; | |
1742 | ||
1743 | static char *memex_subcmd_help_string = | |
1744 | "Memory examine subcommands:\n" | |
1745 | " hexval write this val to current location\n" | |
1746 | " 'string' write chars from string to this location\n" | |
1747 | " ' increment address\n" | |
1748 | " ^ decrement address\n" | |
1749 | " / increment addr by 0x10. //=0x100, ///=0x1000, etc\n" | |
1750 | " \\ decrement addr by 0x10. \\\\=0x100, \\\\\\=0x1000, etc\n" | |
1751 | " ` clear no-read flag\n" | |
1752 | " ; stay at this addr\n" | |
1753 | " v change to byte mode\n" | |
1754 | " w change to word (2 byte) mode\n" | |
1755 | " l change to long (4 byte) mode\n" | |
1756 | " u change to doubleword (8 byte) mode\n" | |
1757 | " m addr change current addr\n" | |
1758 | " n toggle no-read flag\n" | |
1759 | " r toggle byte reverse flag\n" | |
1760 | " < count back up count bytes\n" | |
1761 | " > count skip forward count bytes\n" | |
1762 | " x exit this mode\n" | |
1763 | ""; | |
1764 | ||
1765 | void | |
1766 | memex(void) | |
1767 | { | |
1768 | int cmd, inc, i, nslash; | |
1769 | unsigned long n; | |
1770 | unsigned char val[16]; | |
1771 | ||
1772 | scanhex((void *)&adrs); | |
1773 | cmd = skipbl(); | |
1774 | if (cmd == '?') { | |
1775 | printf(memex_help_string); | |
1776 | return; | |
1777 | } else { | |
1778 | termch = cmd; | |
1779 | } | |
1780 | last_cmd = "m\n"; | |
1781 | while ((cmd = skipbl()) != '\n') { | |
1782 | switch( cmd ){ | |
1783 | case 'b': size = 1; break; | |
1784 | case 'w': size = 2; break; | |
1785 | case 'l': size = 4; break; | |
1786 | case 'd': size = 8; break; | |
1787 | case 'r': brev = !brev; break; | |
1788 | case 'n': mnoread = 1; break; | |
1789 | case '.': mnoread = 0; break; | |
1790 | } | |
1791 | } | |
1792 | if( size <= 0 ) | |
1793 | size = 1; | |
1794 | else if( size > 8 ) | |
1795 | size = 8; | |
1796 | for(;;){ | |
1797 | if (!mnoread) | |
1798 | n = mread(adrs, val, size); | |
1799 | printf("%.16x%c", adrs, brev? 'r': ' '); | |
1800 | if (!mnoread) { | |
1801 | if (brev) | |
1802 | byterev(val, size); | |
1803 | putchar(' '); | |
1804 | for (i = 0; i < n; ++i) | |
1805 | printf("%.2x", val[i]); | |
1806 | for (; i < size; ++i) | |
1807 | printf("%s", fault_chars[fault_type]); | |
1808 | } | |
1809 | putchar(' '); | |
1810 | inc = size; | |
1811 | nslash = 0; | |
1812 | for(;;){ | |
1813 | if( scanhex(&n) ){ | |
1814 | for (i = 0; i < size; ++i) | |
1815 | val[i] = n >> (i * 8); | |
1816 | if (!brev) | |
1817 | byterev(val, size); | |
1818 | mwrite(adrs, val, size); | |
1819 | inc = size; | |
1820 | } | |
1821 | cmd = skipbl(); | |
1822 | if (cmd == '\n') | |
1823 | break; | |
1824 | inc = 0; | |
1825 | switch (cmd) { | |
1826 | case '\'': | |
1827 | for(;;){ | |
1828 | n = inchar(); | |
1829 | if( n == '\\' ) | |
1830 | n = bsesc(); | |
1831 | else if( n == '\'' ) | |
1832 | break; | |
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 | adrs += size; | |
1839 | } | |
1840 | adrs -= size; | |
1841 | inc = size; | |
1842 | break; | |
1843 | case ',': | |
1844 | adrs += size; | |
1845 | break; | |
1846 | case '.': | |
1847 | mnoread = 0; | |
1848 | break; | |
1849 | case ';': | |
1850 | break; | |
1851 | case 'x': | |
1852 | case EOF: | |
1853 | scannl(); | |
1854 | return; | |
1855 | case 'b': | |
1856 | case 'v': | |
1857 | size = 1; | |
1858 | break; | |
1859 | case 'w': | |
1860 | size = 2; | |
1861 | break; | |
1862 | case 'l': | |
1863 | size = 4; | |
1864 | break; | |
1865 | case 'u': | |
1866 | size = 8; | |
1867 | break; | |
1868 | case '^': | |
1869 | adrs -= size; | |
1870 | break; | |
1871 | break; | |
1872 | case '/': | |
1873 | if (nslash > 0) | |
1874 | adrs -= 1 << nslash; | |
1875 | else | |
1876 | nslash = 0; | |
1877 | nslash += 4; | |
1878 | adrs += 1 << nslash; | |
1879 | break; | |
1880 | case '\\': | |
1881 | if (nslash < 0) | |
1882 | adrs += 1 << -nslash; | |
1883 | else | |
1884 | nslash = 0; | |
1885 | nslash -= 4; | |
1886 | adrs -= 1 << -nslash; | |
1887 | break; | |
1888 | case 'm': | |
1889 | scanhex((void *)&adrs); | |
1890 | break; | |
1891 | case 'n': | |
1892 | mnoread = 1; | |
1893 | break; | |
1894 | case 'r': | |
1895 | brev = !brev; | |
1896 | break; | |
1897 | case '<': | |
1898 | n = size; | |
1899 | scanhex(&n); | |
1900 | adrs -= n; | |
1901 | break; | |
1902 | case '>': | |
1903 | n = size; | |
1904 | scanhex(&n); | |
1905 | adrs += n; | |
1906 | break; | |
1907 | case '?': | |
1908 | printf(memex_subcmd_help_string); | |
1909 | break; | |
1910 | } | |
1911 | } | |
1912 | adrs += inc; | |
1913 | } | |
1914 | } | |
1915 | ||
1916 | int | |
1917 | bsesc(void) | |
1918 | { | |
1919 | int c; | |
1920 | ||
1921 | c = inchar(); | |
1922 | switch( c ){ | |
1923 | case 'n': c = '\n'; break; | |
1924 | case 'r': c = '\r'; break; | |
1925 | case 'b': c = '\b'; break; | |
1926 | case 't': c = '\t'; break; | |
1927 | } | |
1928 | return c; | |
1929 | } | |
1930 | ||
1931 | #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ | |
1932 | || ('a' <= (c) && (c) <= 'f') \ | |
1933 | || ('A' <= (c) && (c) <= 'F')) | |
1934 | void | |
1935 | dump(void) | |
1936 | { | |
1937 | int c; | |
1938 | ||
1939 | c = inchar(); | |
1940 | if ((isxdigit(c) && c != 'f' && c != 'd') || c == '\n') | |
1941 | termch = c; | |
1942 | scanhex((void *)&adrs); | |
1943 | if (termch != '\n') | |
1944 | termch = 0; | |
1945 | if (c == 'i') { | |
1946 | scanhex(&nidump); | |
1947 | if (nidump == 0) | |
1948 | nidump = 16; | |
1949 | else if (nidump > MAX_DUMP) | |
1950 | nidump = MAX_DUMP; | |
1951 | adrs += ppc_inst_dump(adrs, nidump, 1); | |
1952 | last_cmd = "di\n"; | |
1953 | } else { | |
1954 | scanhex(&ndump); | |
1955 | if (ndump == 0) | |
1956 | ndump = 64; | |
1957 | else if (ndump > MAX_DUMP) | |
1958 | ndump = MAX_DUMP; | |
1959 | prdump(adrs, ndump); | |
1960 | adrs += ndump; | |
1961 | last_cmd = "d\n"; | |
1962 | } | |
1963 | } | |
1964 | ||
1965 | void | |
1966 | prdump(unsigned long adrs, long ndump) | |
1967 | { | |
1968 | long n, m, c, r, nr; | |
1969 | unsigned char temp[16]; | |
1970 | ||
1971 | for (n = ndump; n > 0;) { | |
1972 | printf("%.16lx", adrs); | |
1973 | putchar(' '); | |
1974 | r = n < 16? n: 16; | |
1975 | nr = mread(adrs, temp, r); | |
1976 | adrs += nr; | |
1977 | for (m = 0; m < r; ++m) { | |
1978 | if ((m & 7) == 0 && m > 0) | |
1979 | putchar(' '); | |
1980 | if (m < nr) | |
1981 | printf("%.2x", temp[m]); | |
1982 | else | |
1983 | printf("%s", fault_chars[fault_type]); | |
1984 | } | |
1985 | if (m <= 8) | |
1986 | printf(" "); | |
1987 | for (; m < 16; ++m) | |
1988 | printf(" "); | |
1989 | printf(" |"); | |
1990 | for (m = 0; m < r; ++m) { | |
1991 | if (m < nr) { | |
1992 | c = temp[m]; | |
1993 | putchar(' ' <= c && c <= '~'? c: '.'); | |
1994 | } else | |
1995 | putchar(' '); | |
1996 | } | |
1997 | n -= r; | |
1998 | for (; m < 16; ++m) | |
1999 | putchar(' '); | |
2000 | printf("|\n"); | |
2001 | if (nr < r) | |
2002 | break; | |
2003 | } | |
2004 | } | |
2005 | ||
2006 | int | |
2007 | ppc_inst_dump(unsigned long adr, long count, int praddr) | |
2008 | { | |
2009 | int nr, dotted; | |
2010 | unsigned long first_adr; | |
2011 | unsigned long inst, last_inst = 0; | |
2012 | unsigned char val[4]; | |
2013 | ||
2014 | dotted = 0; | |
2015 | for (first_adr = adr; count > 0; --count, adr += 4) { | |
2016 | nr = mread(adr, val, 4); | |
2017 | if (nr == 0) { | |
2018 | if (praddr) { | |
2019 | const char *x = fault_chars[fault_type]; | |
2020 | printf("%.16lx %s%s%s%s\n", adr, x, x, x, x); | |
2021 | } | |
2022 | break; | |
2023 | } | |
2024 | inst = GETWORD(val); | |
2025 | if (adr > first_adr && inst == last_inst) { | |
2026 | if (!dotted) { | |
2027 | printf(" ...\n"); | |
2028 | dotted = 1; | |
2029 | } | |
2030 | continue; | |
2031 | } | |
2032 | dotted = 0; | |
2033 | last_inst = inst; | |
2034 | if (praddr) | |
2035 | printf("%.16lx %.8x", adr, inst); | |
2036 | printf("\t"); | |
2037 | print_insn_powerpc(inst, adr, 0); /* always returns 4 */ | |
2038 | printf("\n"); | |
2039 | } | |
2040 | return adr - first_adr; | |
2041 | } | |
2042 | ||
2043 | void | |
2044 | print_address(unsigned long addr) | |
2045 | { | |
2046 | xmon_print_symbol(addr, "\t# ", ""); | |
2047 | } | |
2048 | ||
2049 | ||
2050 | /* | |
2051 | * Memory operations - move, set, print differences | |
2052 | */ | |
2053 | static unsigned long mdest; /* destination address */ | |
2054 | static unsigned long msrc; /* source address */ | |
2055 | static unsigned long mval; /* byte value to set memory to */ | |
2056 | static unsigned long mcount; /* # bytes to affect */ | |
2057 | static unsigned long mdiffs; /* max # differences to print */ | |
2058 | ||
2059 | void | |
2060 | memops(int cmd) | |
2061 | { | |
2062 | scanhex((void *)&mdest); | |
2063 | if( termch != '\n' ) | |
2064 | termch = 0; | |
2065 | scanhex((void *)(cmd == 's'? &mval: &msrc)); | |
2066 | if( termch != '\n' ) | |
2067 | termch = 0; | |
2068 | scanhex((void *)&mcount); | |
2069 | switch( cmd ){ | |
2070 | case 'm': | |
2071 | memmove((void *)mdest, (void *)msrc, mcount); | |
2072 | break; | |
2073 | case 's': | |
2074 | memset((void *)mdest, mval, mcount); | |
2075 | break; | |
2076 | case 'd': | |
2077 | if( termch != '\n' ) | |
2078 | termch = 0; | |
2079 | scanhex((void *)&mdiffs); | |
2080 | memdiffs((unsigned char *)mdest, (unsigned char *)msrc, mcount, mdiffs); | |
2081 | break; | |
2082 | } | |
2083 | } | |
2084 | ||
2085 | void | |
2086 | memdiffs(unsigned char *p1, unsigned char *p2, unsigned nb, unsigned maxpr) | |
2087 | { | |
2088 | unsigned n, prt; | |
2089 | ||
2090 | prt = 0; | |
2091 | for( n = nb; n > 0; --n ) | |
2092 | if( *p1++ != *p2++ ) | |
2093 | if( ++prt <= maxpr ) | |
2094 | printf("%.16x %.2x # %.16x %.2x\n", p1 - 1, | |
2095 | p1[-1], p2 - 1, p2[-1]); | |
2096 | if( prt > maxpr ) | |
2097 | printf("Total of %d differences\n", prt); | |
2098 | } | |
2099 | ||
2100 | static unsigned mend; | |
2101 | static unsigned mask; | |
2102 | ||
2103 | void | |
2104 | memlocate(void) | |
2105 | { | |
2106 | unsigned a, n; | |
2107 | unsigned char val[4]; | |
2108 | ||
2109 | last_cmd = "ml"; | |
2110 | scanhex((void *)&mdest); | |
2111 | if (termch != '\n') { | |
2112 | termch = 0; | |
2113 | scanhex((void *)&mend); | |
2114 | if (termch != '\n') { | |
2115 | termch = 0; | |
2116 | scanhex((void *)&mval); | |
2117 | mask = ~0; | |
2118 | if (termch != '\n') termch = 0; | |
2119 | scanhex((void *)&mask); | |
2120 | } | |
2121 | } | |
2122 | n = 0; | |
2123 | for (a = mdest; a < mend; a += 4) { | |
2124 | if (mread(a, val, 4) == 4 | |
2125 | && ((GETWORD(val) ^ mval) & mask) == 0) { | |
2126 | printf("%.16x: %.16x\n", a, GETWORD(val)); | |
2127 | if (++n >= 10) | |
2128 | break; | |
2129 | } | |
2130 | } | |
2131 | } | |
2132 | ||
2133 | static unsigned long mskip = 0x1000; | |
2134 | static unsigned long mlim = 0xffffffff; | |
2135 | ||
2136 | void | |
2137 | memzcan(void) | |
2138 | { | |
2139 | unsigned char v; | |
2140 | unsigned a; | |
2141 | int ok, ook; | |
2142 | ||
2143 | scanhex(&mdest); | |
2144 | if (termch != '\n') termch = 0; | |
2145 | scanhex(&mskip); | |
2146 | if (termch != '\n') termch = 0; | |
2147 | scanhex(&mlim); | |
2148 | ook = 0; | |
2149 | for (a = mdest; a < mlim; a += mskip) { | |
2150 | ok = mread(a, &v, 1); | |
2151 | if (ok && !ook) { | |
2152 | printf("%.8x .. ", a); | |
2153 | fflush(stdout); | |
2154 | } else if (!ok && ook) | |
2155 | printf("%.8x\n", a - mskip); | |
2156 | ook = ok; | |
2157 | if (a + mskip < a) | |
2158 | break; | |
2159 | } | |
2160 | if (ook) | |
2161 | printf("%.8x\n", a - mskip); | |
2162 | } | |
2163 | ||
2164 | /* Input scanning routines */ | |
2165 | int | |
2166 | skipbl(void) | |
2167 | { | |
2168 | int c; | |
2169 | ||
2170 | if( termch != 0 ){ | |
2171 | c = termch; | |
2172 | termch = 0; | |
2173 | } else | |
2174 | c = inchar(); | |
2175 | while( c == ' ' || c == '\t' ) | |
2176 | c = inchar(); | |
2177 | return c; | |
2178 | } | |
2179 | ||
2180 | #define N_PTREGS 44 | |
2181 | static char *regnames[N_PTREGS] = { | |
2182 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", | |
2183 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", | |
2184 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", | |
2185 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", | |
2186 | "pc", "msr", "or3", "ctr", "lr", "xer", "ccr", "softe", | |
2187 | "trap", "dar", "dsisr", "res" | |
2188 | }; | |
2189 | ||
2190 | int | |
2191 | scanhex(unsigned long *vp) | |
2192 | { | |
2193 | int c, d; | |
2194 | unsigned long v; | |
2195 | ||
2196 | c = skipbl(); | |
2197 | if (c == '%') { | |
2198 | /* parse register name */ | |
2199 | char regname[8]; | |
2200 | int i; | |
2201 | ||
2202 | for (i = 0; i < sizeof(regname) - 1; ++i) { | |
2203 | c = inchar(); | |
2204 | if (!isalnum(c)) { | |
2205 | termch = c; | |
2206 | break; | |
2207 | } | |
2208 | regname[i] = c; | |
2209 | } | |
2210 | regname[i] = 0; | |
2211 | for (i = 0; i < N_PTREGS; ++i) { | |
2212 | if (strcmp(regnames[i], regname) == 0) { | |
2213 | if (xmon_regs == NULL) { | |
2214 | printf("regs not available\n"); | |
2215 | return 0; | |
2216 | } | |
2217 | *vp = ((unsigned long *)xmon_regs)[i]; | |
2218 | return 1; | |
2219 | } | |
2220 | } | |
2221 | printf("invalid register name '%%%s'\n", regname); | |
2222 | return 0; | |
2223 | } | |
2224 | ||
2225 | /* skip leading "0x" if any */ | |
2226 | ||
2227 | if (c == '0') { | |
2228 | c = inchar(); | |
2229 | if (c == 'x') { | |
2230 | c = inchar(); | |
2231 | } else { | |
2232 | d = hexdigit(c); | |
2233 | if (d == EOF) { | |
2234 | termch = c; | |
2235 | *vp = 0; | |
2236 | return 1; | |
2237 | } | |
2238 | } | |
2239 | } else if (c == '$') { | |
2240 | int i; | |
2241 | for (i=0; i<63; i++) { | |
2242 | c = inchar(); | |
2243 | if (isspace(c)) { | |
2244 | termch = c; | |
2245 | break; | |
2246 | } | |
2247 | tmpstr[i] = c; | |
2248 | } | |
2249 | tmpstr[i++] = 0; | |
6879dc13 BH |
2250 | *vp = 0; |
2251 | if (setjmp(bus_error_jmp) == 0) { | |
2252 | catch_memory_errors = 1; | |
2253 | sync(); | |
2254 | *vp = kallsyms_lookup_name(tmpstr); | |
2255 | sync(); | |
2256 | } | |
2257 | catch_memory_errors = 0; | |
1da177e4 LT |
2258 | if (!(*vp)) { |
2259 | printf("unknown symbol '%s'\n", tmpstr); | |
2260 | return 0; | |
2261 | } | |
2262 | return 1; | |
2263 | } | |
2264 | ||
2265 | d = hexdigit(c); | |
2266 | if (d == EOF) { | |
2267 | termch = c; | |
2268 | return 0; | |
2269 | } | |
2270 | v = 0; | |
2271 | do { | |
2272 | v = (v << 4) + d; | |
2273 | c = inchar(); | |
2274 | d = hexdigit(c); | |
2275 | } while (d != EOF); | |
2276 | termch = c; | |
2277 | *vp = v; | |
2278 | return 1; | |
2279 | } | |
2280 | ||
2281 | void | |
2282 | scannl(void) | |
2283 | { | |
2284 | int c; | |
2285 | ||
2286 | c = termch; | |
2287 | termch = 0; | |
2288 | while( c != '\n' ) | |
2289 | c = inchar(); | |
2290 | } | |
2291 | ||
2292 | int | |
2293 | hexdigit(int c) | |
2294 | { | |
2295 | if( '0' <= c && c <= '9' ) | |
2296 | return c - '0'; | |
2297 | if( 'A' <= c && c <= 'F' ) | |
2298 | return c - ('A' - 10); | |
2299 | if( 'a' <= c && c <= 'f' ) | |
2300 | return c - ('a' - 10); | |
2301 | return EOF; | |
2302 | } | |
2303 | ||
2304 | void | |
2305 | getstring(char *s, int size) | |
2306 | { | |
2307 | int c; | |
2308 | ||
2309 | c = skipbl(); | |
2310 | do { | |
2311 | if( size > 1 ){ | |
2312 | *s++ = c; | |
2313 | --size; | |
2314 | } | |
2315 | c = inchar(); | |
2316 | } while( c != ' ' && c != '\t' && c != '\n' ); | |
2317 | termch = c; | |
2318 | *s = 0; | |
2319 | } | |
2320 | ||
2321 | static char line[256]; | |
2322 | static char *lineptr; | |
2323 | ||
2324 | void | |
2325 | flush_input(void) | |
2326 | { | |
2327 | lineptr = NULL; | |
2328 | } | |
2329 | ||
2330 | int | |
2331 | inchar(void) | |
2332 | { | |
2333 | if (lineptr == NULL || *lineptr == 0) { | |
2334 | if (fgets(line, sizeof(line), stdin) == NULL) { | |
2335 | lineptr = NULL; | |
2336 | return EOF; | |
2337 | } | |
2338 | lineptr = line; | |
2339 | } | |
2340 | return *lineptr++; | |
2341 | } | |
2342 | ||
2343 | void | |
2344 | take_input(char *str) | |
2345 | { | |
2346 | lineptr = str; | |
2347 | } | |
2348 | ||
2349 | ||
2350 | static void | |
2351 | symbol_lookup(void) | |
2352 | { | |
2353 | int type = inchar(); | |
2354 | unsigned long addr; | |
2355 | static char tmp[64]; | |
2356 | ||
2357 | switch (type) { | |
2358 | case 'a': | |
2359 | if (scanhex(&addr)) | |
2360 | xmon_print_symbol(addr, ": ", "\n"); | |
2361 | termch = 0; | |
2362 | break; | |
2363 | case 's': | |
2364 | getstring(tmp, 64); | |
2365 | if (setjmp(bus_error_jmp) == 0) { | |
2366 | catch_memory_errors = 1; | |
2367 | sync(); | |
2368 | addr = kallsyms_lookup_name(tmp); | |
2369 | if (addr) | |
2370 | printf("%s: %lx\n", tmp, addr); | |
2371 | else | |
2372 | printf("Symbol '%s' not found.\n", tmp); | |
2373 | sync(); | |
2374 | } | |
2375 | catch_memory_errors = 0; | |
2376 | termch = 0; | |
2377 | break; | |
2378 | } | |
2379 | } | |
2380 | ||
2381 | ||
2382 | /* Print an address in numeric and symbolic form (if possible) */ | |
2383 | static void xmon_print_symbol(unsigned long address, const char *mid, | |
2384 | const char *after) | |
2385 | { | |
2386 | char *modname; | |
2387 | const char *name = NULL; | |
2388 | unsigned long offset, size; | |
2389 | ||
2390 | printf("%.16lx", address); | |
2391 | if (setjmp(bus_error_jmp) == 0) { | |
2392 | catch_memory_errors = 1; | |
2393 | sync(); | |
2394 | name = kallsyms_lookup(address, &size, &offset, &modname, | |
2395 | tmpstr); | |
2396 | sync(); | |
2397 | /* wait a little while to see if we get a machine check */ | |
2398 | __delay(200); | |
2399 | } | |
2400 | ||
2401 | catch_memory_errors = 0; | |
2402 | ||
2403 | if (name) { | |
2404 | printf("%s%s+%#lx/%#lx", mid, name, offset, size); | |
2405 | if (modname) | |
2406 | printf(" [%s]", modname); | |
2407 | } | |
2408 | printf("%s", after); | |
2409 | } | |
2410 | ||
2411 | static void debug_trace(void) | |
2412 | { | |
2413 | unsigned long val, cmd, on; | |
2414 | ||
2415 | cmd = skipbl(); | |
2416 | if (cmd == '\n') { | |
2417 | /* show current state */ | |
2418 | unsigned long i; | |
2419 | printf("ppc64_debug_switch = 0x%lx\n", ppc64_debug_switch); | |
2420 | for (i = 0; i < PPCDBG_NUM_FLAGS ;i++) { | |
2421 | on = PPCDBG_BITVAL(i) & ppc64_debug_switch; | |
2422 | printf("%02x %s %12s ", i, on ? "on " : "off", trace_names[i] ? trace_names[i] : ""); | |
2423 | if (((i+1) % 3) == 0) | |
2424 | printf("\n"); | |
2425 | } | |
2426 | printf("\n"); | |
2427 | return; | |
2428 | } | |
2429 | while (cmd != '\n') { | |
2430 | on = 1; /* default if no sign given */ | |
2431 | while (cmd == '+' || cmd == '-') { | |
2432 | on = (cmd == '+'); | |
2433 | cmd = inchar(); | |
2434 | if (cmd == ' ' || cmd == '\n') { /* Turn on or off based on + or - */ | |
2435 | ppc64_debug_switch = on ? PPCDBG_ALL:PPCDBG_NONE; | |
2436 | printf("Setting all values to %s...\n", on ? "on" : "off"); | |
2437 | if (cmd == '\n') return; | |
2438 | else cmd = skipbl(); | |
2439 | } | |
2440 | else | |
2441 | termch = cmd; | |
2442 | } | |
2443 | termch = cmd; /* not +/- ... let scanhex see it */ | |
2444 | scanhex((void *)&val); | |
2445 | if (val >= 64) { | |
2446 | printf("Value %x out of range:\n", val); | |
2447 | return; | |
2448 | } | |
2449 | if (on) { | |
2450 | ppc64_debug_switch |= PPCDBG_BITVAL(val); | |
2451 | printf("enable debug %x %s\n", val, trace_names[val] ? trace_names[val] : ""); | |
2452 | } else { | |
2453 | ppc64_debug_switch &= ~PPCDBG_BITVAL(val); | |
2454 | printf("disable debug %x %s\n", val, trace_names[val] ? trace_names[val] : ""); | |
2455 | } | |
2456 | cmd = skipbl(); | |
2457 | } | |
2458 | } | |
2459 | ||
2460 | static void dump_slb(void) | |
2461 | { | |
2462 | int i; | |
2463 | unsigned long tmp; | |
2464 | ||
2465 | printf("SLB contents of cpu %x\n", smp_processor_id()); | |
2466 | ||
2467 | for (i = 0; i < SLB_NUM_ENTRIES; i++) { | |
2468 | asm volatile("slbmfee %0,%1" : "=r" (tmp) : "r" (i)); | |
2469 | printf("%02d %016lx ", i, tmp); | |
2470 | ||
2471 | asm volatile("slbmfev %0,%1" : "=r" (tmp) : "r" (i)); | |
2472 | printf("%016lx\n", tmp); | |
2473 | } | |
2474 | } | |
2475 | ||
2476 | static void dump_stab(void) | |
2477 | { | |
2478 | int i; | |
2479 | unsigned long *tmp = (unsigned long *)get_paca()->stab_addr; | |
2480 | ||
2481 | printf("Segment table contents of cpu %x\n", smp_processor_id()); | |
2482 | ||
2483 | for (i = 0; i < PAGE_SIZE/16; i++) { | |
2484 | unsigned long a, b; | |
2485 | ||
2486 | a = *tmp++; | |
2487 | b = *tmp++; | |
2488 | ||
2489 | if (a || b) { | |
2490 | printf("%03d %016lx ", i, a); | |
2491 | printf("%016lx\n", b); | |
2492 | } | |
2493 | } | |
2494 | } | |
2495 | ||
2496 | void xmon_init(void) | |
2497 | { | |
2498 | __debugger = xmon; | |
2499 | __debugger_ipi = xmon_ipi; | |
2500 | __debugger_bpt = xmon_bpt; | |
2501 | __debugger_sstep = xmon_sstep; | |
2502 | __debugger_iabr_match = xmon_iabr_match; | |
2503 | __debugger_dabr_match = xmon_dabr_match; | |
2504 | __debugger_fault_handler = xmon_fault_handler; | |
2505 | } | |
2506 | ||
2507 | void dump_segments(void) | |
2508 | { | |
2509 | if (cpu_has_feature(CPU_FTR_SLB)) | |
2510 | dump_slb(); | |
2511 | else | |
2512 | dump_stab(); | |
2513 | } |