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Commit | Line | Data |
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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> |
7d12e780 | 24 | #include <linux/irq.h> |
1da177e4 LT |
25 | |
26 | #include <asm/ptrace.h> | |
27 | #include <asm/string.h> | |
28 | #include <asm/prom.h> | |
29 | #include <asm/machdep.h> | |
f78541dc | 30 | #include <asm/xmon.h> |
1da177e4 LT |
31 | #include <asm/processor.h> |
32 | #include <asm/pgtable.h> | |
33 | #include <asm/mmu.h> | |
34 | #include <asm/mmu_context.h> | |
1da177e4 LT |
35 | #include <asm/cputable.h> |
36 | #include <asm/rtas.h> | |
37 | #include <asm/sstep.h> | |
38 | #include <asm/bug.h> | |
f583ffce | 39 | #include <asm/irq_regs.h> |
f78541dc PM |
40 | |
41 | #ifdef CONFIG_PPC64 | |
1da177e4 | 42 | #include <asm/hvcall.h> |
f78541dc PM |
43 | #include <asm/paca.h> |
44 | #endif | |
1da177e4 LT |
45 | |
46 | #include "nonstdio.h" | |
1da177e4 LT |
47 | |
48 | #define scanhex xmon_scanhex | |
49 | #define skipbl xmon_skipbl | |
50 | ||
51 | #ifdef CONFIG_SMP | |
52 | cpumask_t cpus_in_xmon = CPU_MASK_NONE; | |
53 | static unsigned long xmon_taken = 1; | |
54 | static int xmon_owner; | |
55 | static int xmon_gate; | |
56 | #endif /* CONFIG_SMP */ | |
57 | ||
58 | static unsigned long in_xmon = 0; | |
59 | ||
60 | static unsigned long adrs; | |
61 | static int size = 1; | |
62 | #define MAX_DUMP (128 * 1024) | |
63 | static unsigned long ndump = 64; | |
64 | static unsigned long nidump = 16; | |
65 | static unsigned long ncsum = 4096; | |
66 | static int termch; | |
67 | static char tmpstr[128]; | |
68 | ||
f78541dc | 69 | #define JMP_BUF_LEN 23 |
1da177e4 LT |
70 | static long bus_error_jmp[JMP_BUF_LEN]; |
71 | static int catch_memory_errors; | |
72 | static long *xmon_fault_jmp[NR_CPUS]; | |
73 | #define setjmp xmon_setjmp | |
74 | #define longjmp xmon_longjmp | |
75 | ||
76 | /* Breakpoint stuff */ | |
77 | struct bpt { | |
78 | unsigned long address; | |
79 | unsigned int instr[2]; | |
80 | atomic_t ref_count; | |
81 | int enabled; | |
82 | unsigned long pad; | |
83 | }; | |
84 | ||
85 | /* Bits in bpt.enabled */ | |
86 | #define BP_IABR_TE 1 /* IABR translation enabled */ | |
87 | #define BP_IABR 2 | |
88 | #define BP_TRAP 8 | |
89 | #define BP_DABR 0x10 | |
90 | ||
91 | #define NBPTS 256 | |
92 | static struct bpt bpts[NBPTS]; | |
93 | static struct bpt dabr; | |
94 | static struct bpt *iabr; | |
95 | static unsigned bpinstr = 0x7fe00008; /* trap */ | |
96 | ||
97 | #define BP_NUM(bp) ((bp) - bpts + 1) | |
98 | ||
99 | /* Prototypes */ | |
100 | static int cmds(struct pt_regs *); | |
101 | static int mread(unsigned long, void *, int); | |
102 | static int mwrite(unsigned long, void *, int); | |
103 | static int handle_fault(struct pt_regs *); | |
104 | static void byterev(unsigned char *, int); | |
105 | static void memex(void); | |
106 | static int bsesc(void); | |
107 | static void dump(void); | |
108 | static void prdump(unsigned long, long); | |
109 | static int ppc_inst_dump(unsigned long, long, int); | |
110 | void print_address(unsigned long); | |
111 | static void backtrace(struct pt_regs *); | |
112 | static void excprint(struct pt_regs *); | |
113 | static void prregs(struct pt_regs *); | |
114 | static void memops(int); | |
115 | static void memlocate(void); | |
116 | static void memzcan(void); | |
117 | static void memdiffs(unsigned char *, unsigned char *, unsigned, unsigned); | |
118 | int skipbl(void); | |
119 | int scanhex(unsigned long *valp); | |
120 | static void scannl(void); | |
121 | static int hexdigit(int); | |
122 | void getstring(char *, int); | |
123 | static void flush_input(void); | |
124 | static int inchar(void); | |
125 | static void take_input(char *); | |
126 | static unsigned long read_spr(int); | |
127 | static void write_spr(int, unsigned long); | |
128 | static void super_regs(void); | |
129 | static void remove_bpts(void); | |
130 | static void insert_bpts(void); | |
131 | static void remove_cpu_bpts(void); | |
132 | static void insert_cpu_bpts(void); | |
133 | static struct bpt *at_breakpoint(unsigned long pc); | |
134 | static struct bpt *in_breakpoint_table(unsigned long pc, unsigned long *offp); | |
135 | static int do_step(struct pt_regs *); | |
136 | static void bpt_cmds(void); | |
137 | static void cacheflush(void); | |
138 | static int cpu_cmd(void); | |
139 | static void csum(void); | |
140 | static void bootcmds(void); | |
f78541dc | 141 | static void proccall(void); |
1da177e4 LT |
142 | void dump_segments(void); |
143 | static void symbol_lookup(void); | |
26c8af5f OH |
144 | static void xmon_show_stack(unsigned long sp, unsigned long lr, |
145 | unsigned long pc); | |
1da177e4 LT |
146 | static void xmon_print_symbol(unsigned long address, const char *mid, |
147 | const char *after); | |
148 | static const char *getvecname(unsigned long vec); | |
149 | ||
26c8af5f OH |
150 | int xmon_no_auto_backtrace; |
151 | ||
1da177e4 | 152 | extern int print_insn_powerpc(unsigned long, unsigned long, int); |
f78541dc PM |
153 | |
154 | extern void xmon_enter(void); | |
155 | extern void xmon_leave(void); | |
156 | ||
f78541dc PM |
157 | extern long setjmp(long *); |
158 | extern void longjmp(long *, long); | |
159 | extern void xmon_save_regs(struct pt_regs *); | |
160 | ||
161 | #ifdef CONFIG_PPC64 | |
162 | #define REG "%.16lx" | |
163 | #define REGS_PER_LINE 4 | |
164 | #define LAST_VOLATILE 13 | |
165 | #else | |
166 | #define REG "%.8lx" | |
167 | #define REGS_PER_LINE 8 | |
168 | #define LAST_VOLATILE 12 | |
169 | #endif | |
1da177e4 LT |
170 | |
171 | #define GETWORD(v) (((v)[0] << 24) + ((v)[1] << 16) + ((v)[2] << 8) + (v)[3]) | |
172 | ||
173 | #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ | |
174 | || ('a' <= (c) && (c) <= 'f') \ | |
175 | || ('A' <= (c) && (c) <= 'F')) | |
176 | #define isalnum(c) (('0' <= (c) && (c) <= '9') \ | |
177 | || ('a' <= (c) && (c) <= 'z') \ | |
178 | || ('A' <= (c) && (c) <= 'Z')) | |
179 | #define isspace(c) (c == ' ' || c == '\t' || c == 10 || c == 13 || c == 0) | |
180 | ||
181 | static char *help_string = "\ | |
182 | Commands:\n\ | |
183 | b show breakpoints\n\ | |
184 | bd set data breakpoint\n\ | |
185 | bi set instruction breakpoint\n\ | |
186 | bc clear breakpoint\n" | |
187 | #ifdef CONFIG_SMP | |
188 | "\ | |
189 | c print cpus stopped in xmon\n\ | |
190 | c# try to switch to cpu number h (in hex)\n" | |
191 | #endif | |
192 | "\ | |
193 | C checksum\n\ | |
194 | d dump bytes\n\ | |
195 | di dump instructions\n\ | |
196 | df dump float values\n\ | |
197 | dd dump double values\n\ | |
7e5b5938 | 198 | dr dump stream of raw bytes\n\ |
1da177e4 LT |
199 | e print exception information\n\ |
200 | f flush cache\n\ | |
201 | la lookup symbol+offset of specified address\n\ | |
202 | ls lookup address of specified symbol\n\ | |
203 | m examine/change memory\n\ | |
204 | mm move a block of memory\n\ | |
205 | ms set a block of memory\n\ | |
206 | md compare two blocks of memory\n\ | |
207 | ml locate a block of memory\n\ | |
208 | mz zero a block of memory\n\ | |
209 | mi show information about memory allocation\n\ | |
f78541dc | 210 | p call a procedure\n\ |
1da177e4 LT |
211 | r print registers\n\ |
212 | s single step\n\ | |
213 | S print special registers\n\ | |
214 | t print backtrace\n\ | |
1da177e4 | 215 | x exit monitor and recover\n\ |
f78541dc PM |
216 | X exit monitor and dont recover\n" |
217 | #ifdef CONFIG_PPC64 | |
218 | " u dump segment table or SLB\n" | |
219 | #endif | |
220 | #ifdef CONFIG_PPC_STD_MMU_32 | |
221 | " u dump segment registers\n" | |
222 | #endif | |
223 | " ? help\n" | |
224 | " zr reboot\n\ | |
1da177e4 LT |
225 | zh halt\n" |
226 | ; | |
227 | ||
228 | static struct pt_regs *xmon_regs; | |
229 | ||
f78541dc | 230 | static inline void sync(void) |
1da177e4 LT |
231 | { |
232 | asm volatile("sync; isync"); | |
233 | } | |
234 | ||
f78541dc PM |
235 | static inline void store_inst(void *p) |
236 | { | |
237 | asm volatile ("dcbst 0,%0; sync; icbi 0,%0; isync" : : "r" (p)); | |
238 | } | |
239 | ||
240 | static inline void cflush(void *p) | |
241 | { | |
242 | asm volatile ("dcbf 0,%0; icbi 0,%0" : : "r" (p)); | |
243 | } | |
244 | ||
245 | static inline void cinval(void *p) | |
246 | { | |
247 | asm volatile ("dcbi 0,%0; icbi 0,%0" : : "r" (p)); | |
248 | } | |
1da177e4 LT |
249 | |
250 | /* | |
251 | * Disable surveillance (the service processor watchdog function) | |
252 | * while we are in xmon. | |
253 | * XXX we should re-enable it when we leave. :) | |
254 | */ | |
255 | #define SURVEILLANCE_TOKEN 9000 | |
256 | ||
257 | static inline void disable_surveillance(void) | |
258 | { | |
259 | #ifdef CONFIG_PPC_PSERIES | |
260 | /* Since this can't be a module, args should end up below 4GB. */ | |
261 | static struct rtas_args args; | |
262 | ||
263 | /* | |
264 | * At this point we have got all the cpus we can into | |
265 | * xmon, so there is hopefully no other cpu calling RTAS | |
266 | * at the moment, even though we don't take rtas.lock. | |
267 | * If we did try to take rtas.lock there would be a | |
268 | * real possibility of deadlock. | |
269 | */ | |
270 | args.token = rtas_token("set-indicator"); | |
271 | if (args.token == RTAS_UNKNOWN_SERVICE) | |
272 | return; | |
273 | args.nargs = 3; | |
274 | args.nret = 1; | |
275 | args.rets = &args.args[3]; | |
276 | args.args[0] = SURVEILLANCE_TOKEN; | |
277 | args.args[1] = 0; | |
278 | args.args[2] = 0; | |
279 | enter_rtas(__pa(&args)); | |
280 | #endif /* CONFIG_PPC_PSERIES */ | |
281 | } | |
282 | ||
283 | #ifdef CONFIG_SMP | |
284 | static int xmon_speaker; | |
285 | ||
286 | static void get_output_lock(void) | |
287 | { | |
288 | int me = smp_processor_id() + 0x100; | |
289 | int last_speaker = 0, prev; | |
290 | long timeout; | |
291 | ||
292 | if (xmon_speaker == me) | |
293 | return; | |
294 | for (;;) { | |
295 | if (xmon_speaker == 0) { | |
296 | last_speaker = cmpxchg(&xmon_speaker, 0, me); | |
297 | if (last_speaker == 0) | |
298 | return; | |
299 | } | |
300 | timeout = 10000000; | |
301 | while (xmon_speaker == last_speaker) { | |
302 | if (--timeout > 0) | |
303 | continue; | |
304 | /* hostile takeover */ | |
305 | prev = cmpxchg(&xmon_speaker, last_speaker, me); | |
306 | if (prev == last_speaker) | |
307 | return; | |
308 | break; | |
309 | } | |
310 | } | |
311 | } | |
312 | ||
313 | static void release_output_lock(void) | |
314 | { | |
315 | xmon_speaker = 0; | |
316 | } | |
317 | #endif | |
318 | ||
b0da9856 | 319 | static int xmon_core(struct pt_regs *regs, int fromipi) |
1da177e4 LT |
320 | { |
321 | int cmd = 0; | |
322 | unsigned long msr; | |
323 | struct bpt *bp; | |
324 | long recurse_jmp[JMP_BUF_LEN]; | |
325 | unsigned long offset; | |
326 | #ifdef CONFIG_SMP | |
327 | int cpu; | |
328 | int secondary; | |
329 | unsigned long timeout; | |
330 | #endif | |
331 | ||
f78541dc PM |
332 | msr = mfmsr(); |
333 | mtmsr(msr & ~MSR_EE); /* disable interrupts */ | |
1da177e4 LT |
334 | |
335 | bp = in_breakpoint_table(regs->nip, &offset); | |
336 | if (bp != NULL) { | |
337 | regs->nip = bp->address + offset; | |
338 | atomic_dec(&bp->ref_count); | |
339 | } | |
340 | ||
341 | remove_cpu_bpts(); | |
342 | ||
343 | #ifdef CONFIG_SMP | |
344 | cpu = smp_processor_id(); | |
345 | if (cpu_isset(cpu, cpus_in_xmon)) { | |
346 | get_output_lock(); | |
347 | excprint(regs); | |
348 | printf("cpu 0x%x: Exception %lx %s in xmon, " | |
349 | "returning to main loop\n", | |
350 | cpu, regs->trap, getvecname(TRAP(regs))); | |
5cb4cc0d | 351 | release_output_lock(); |
1da177e4 LT |
352 | longjmp(xmon_fault_jmp[cpu], 1); |
353 | } | |
354 | ||
355 | if (setjmp(recurse_jmp) != 0) { | |
356 | if (!in_xmon || !xmon_gate) { | |
5cb4cc0d | 357 | get_output_lock(); |
1da177e4 LT |
358 | printf("xmon: WARNING: bad recursive fault " |
359 | "on cpu 0x%x\n", cpu); | |
5cb4cc0d | 360 | release_output_lock(); |
1da177e4 LT |
361 | goto waiting; |
362 | } | |
363 | secondary = !(xmon_taken && cpu == xmon_owner); | |
364 | goto cmdloop; | |
365 | } | |
366 | ||
367 | xmon_fault_jmp[cpu] = recurse_jmp; | |
368 | cpu_set(cpu, cpus_in_xmon); | |
369 | ||
370 | bp = NULL; | |
371 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) == (MSR_IR|MSR_SF)) | |
372 | bp = at_breakpoint(regs->nip); | |
373 | if (bp || (regs->msr & MSR_RI) == 0) | |
374 | fromipi = 0; | |
375 | ||
376 | if (!fromipi) { | |
377 | get_output_lock(); | |
378 | excprint(regs); | |
379 | if (bp) { | |
380 | printf("cpu 0x%x stopped at breakpoint 0x%x (", | |
381 | cpu, BP_NUM(bp)); | |
382 | xmon_print_symbol(regs->nip, " ", ")\n"); | |
383 | } | |
384 | if ((regs->msr & MSR_RI) == 0) | |
385 | printf("WARNING: exception is not recoverable, " | |
386 | "can't continue\n"); | |
387 | release_output_lock(); | |
388 | } | |
389 | ||
390 | waiting: | |
391 | secondary = 1; | |
392 | while (secondary && !xmon_gate) { | |
393 | if (in_xmon == 0) { | |
394 | if (fromipi) | |
395 | goto leave; | |
396 | secondary = test_and_set_bit(0, &in_xmon); | |
397 | } | |
398 | barrier(); | |
399 | } | |
400 | ||
401 | if (!secondary && !xmon_gate) { | |
402 | /* we are the first cpu to come in */ | |
403 | /* interrupt other cpu(s) */ | |
404 | int ncpus = num_online_cpus(); | |
405 | ||
406 | xmon_owner = cpu; | |
407 | mb(); | |
408 | if (ncpus > 1) { | |
409 | smp_send_debugger_break(MSG_ALL_BUT_SELF); | |
410 | /* wait for other cpus to come in */ | |
411 | for (timeout = 100000000; timeout != 0; --timeout) { | |
412 | if (cpus_weight(cpus_in_xmon) >= ncpus) | |
413 | break; | |
414 | barrier(); | |
415 | } | |
416 | } | |
417 | remove_bpts(); | |
418 | disable_surveillance(); | |
419 | /* for breakpoint or single step, print the current instr. */ | |
420 | if (bp || TRAP(regs) == 0xd00) | |
421 | ppc_inst_dump(regs->nip, 1, 0); | |
422 | printf("enter ? for help\n"); | |
423 | mb(); | |
424 | xmon_gate = 1; | |
425 | barrier(); | |
426 | } | |
427 | ||
428 | cmdloop: | |
429 | while (in_xmon) { | |
430 | if (secondary) { | |
431 | if (cpu == xmon_owner) { | |
432 | if (!test_and_set_bit(0, &xmon_taken)) { | |
433 | secondary = 0; | |
434 | continue; | |
435 | } | |
436 | /* missed it */ | |
437 | while (cpu == xmon_owner) | |
438 | barrier(); | |
439 | } | |
440 | barrier(); | |
441 | } else { | |
442 | cmd = cmds(regs); | |
443 | if (cmd != 0) { | |
444 | /* exiting xmon */ | |
445 | insert_bpts(); | |
446 | xmon_gate = 0; | |
447 | wmb(); | |
448 | in_xmon = 0; | |
449 | break; | |
450 | } | |
451 | /* have switched to some other cpu */ | |
452 | secondary = 1; | |
453 | } | |
454 | } | |
455 | leave: | |
456 | cpu_clear(cpu, cpus_in_xmon); | |
457 | xmon_fault_jmp[cpu] = NULL; | |
1da177e4 LT |
458 | #else |
459 | /* UP is simple... */ | |
460 | if (in_xmon) { | |
461 | printf("Exception %lx %s in xmon, returning to main loop\n", | |
462 | regs->trap, getvecname(TRAP(regs))); | |
463 | longjmp(xmon_fault_jmp[0], 1); | |
464 | } | |
465 | if (setjmp(recurse_jmp) == 0) { | |
466 | xmon_fault_jmp[0] = recurse_jmp; | |
467 | in_xmon = 1; | |
468 | ||
469 | excprint(regs); | |
470 | bp = at_breakpoint(regs->nip); | |
471 | if (bp) { | |
472 | printf("Stopped at breakpoint %x (", BP_NUM(bp)); | |
473 | xmon_print_symbol(regs->nip, " ", ")\n"); | |
474 | } | |
475 | if ((regs->msr & MSR_RI) == 0) | |
476 | printf("WARNING: exception is not recoverable, " | |
477 | "can't continue\n"); | |
478 | remove_bpts(); | |
479 | disable_surveillance(); | |
480 | /* for breakpoint or single step, print the current instr. */ | |
481 | if (bp || TRAP(regs) == 0xd00) | |
482 | ppc_inst_dump(regs->nip, 1, 0); | |
483 | printf("enter ? for help\n"); | |
484 | } | |
485 | ||
486 | cmd = cmds(regs); | |
487 | ||
488 | insert_bpts(); | |
489 | in_xmon = 0; | |
490 | #endif | |
491 | ||
492 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) == (MSR_IR|MSR_SF)) { | |
493 | bp = at_breakpoint(regs->nip); | |
494 | if (bp != NULL) { | |
495 | int stepped = emulate_step(regs, bp->instr[0]); | |
496 | if (stepped == 0) { | |
497 | regs->nip = (unsigned long) &bp->instr[0]; | |
498 | atomic_inc(&bp->ref_count); | |
499 | } else if (stepped < 0) { | |
500 | printf("Couldn't single-step %s instruction\n", | |
501 | (IS_RFID(bp->instr[0])? "rfid": "mtmsrd")); | |
502 | } | |
503 | } | |
504 | } | |
505 | ||
506 | insert_cpu_bpts(); | |
507 | ||
f78541dc | 508 | mtmsr(msr); /* restore interrupt enable */ |
1da177e4 | 509 | |
0a730ae5 | 510 | return cmd != 'X' && cmd != EOF; |
1da177e4 LT |
511 | } |
512 | ||
513 | int xmon(struct pt_regs *excp) | |
514 | { | |
515 | struct pt_regs regs; | |
516 | ||
517 | if (excp == NULL) { | |
f78541dc | 518 | xmon_save_regs(®s); |
1da177e4 LT |
519 | excp = ®s; |
520 | } | |
521 | return xmon_core(excp, 0); | |
522 | } | |
f78541dc PM |
523 | EXPORT_SYMBOL(xmon); |
524 | ||
f583ffce | 525 | irqreturn_t xmon_irq(int irq, void *d) |
f78541dc PM |
526 | { |
527 | unsigned long flags; | |
528 | local_irq_save(flags); | |
529 | printf("Keyboard interrupt\n"); | |
f583ffce | 530 | xmon(get_irq_regs()); |
f78541dc PM |
531 | local_irq_restore(flags); |
532 | return IRQ_HANDLED; | |
533 | } | |
1da177e4 | 534 | |
b0da9856 | 535 | static int xmon_bpt(struct pt_regs *regs) |
1da177e4 LT |
536 | { |
537 | struct bpt *bp; | |
538 | unsigned long offset; | |
539 | ||
540 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) != (MSR_IR|MSR_SF)) | |
541 | return 0; | |
542 | ||
543 | /* Are we at the trap at bp->instr[1] for some bp? */ | |
544 | bp = in_breakpoint_table(regs->nip, &offset); | |
545 | if (bp != NULL && offset == 4) { | |
546 | regs->nip = bp->address + 4; | |
547 | atomic_dec(&bp->ref_count); | |
548 | return 1; | |
549 | } | |
550 | ||
551 | /* Are we at a breakpoint? */ | |
552 | bp = at_breakpoint(regs->nip); | |
553 | if (!bp) | |
554 | return 0; | |
555 | ||
556 | xmon_core(regs, 0); | |
557 | ||
558 | return 1; | |
559 | } | |
560 | ||
b0da9856 | 561 | static int xmon_sstep(struct pt_regs *regs) |
1da177e4 LT |
562 | { |
563 | if (user_mode(regs)) | |
564 | return 0; | |
565 | xmon_core(regs, 0); | |
566 | return 1; | |
567 | } | |
568 | ||
b0da9856 | 569 | static int xmon_dabr_match(struct pt_regs *regs) |
1da177e4 LT |
570 | { |
571 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) != (MSR_IR|MSR_SF)) | |
572 | return 0; | |
fd9648df AB |
573 | if (dabr.enabled == 0) |
574 | return 0; | |
1da177e4 LT |
575 | xmon_core(regs, 0); |
576 | return 1; | |
577 | } | |
578 | ||
b0da9856 | 579 | static int xmon_iabr_match(struct pt_regs *regs) |
1da177e4 LT |
580 | { |
581 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) != (MSR_IR|MSR_SF)) | |
582 | return 0; | |
583 | if (iabr == 0) | |
584 | return 0; | |
585 | xmon_core(regs, 0); | |
586 | return 1; | |
587 | } | |
588 | ||
b0da9856 | 589 | static int xmon_ipi(struct pt_regs *regs) |
1da177e4 LT |
590 | { |
591 | #ifdef CONFIG_SMP | |
592 | if (in_xmon && !cpu_isset(smp_processor_id(), cpus_in_xmon)) | |
593 | xmon_core(regs, 1); | |
594 | #endif | |
595 | return 0; | |
596 | } | |
597 | ||
b0da9856 | 598 | static int xmon_fault_handler(struct pt_regs *regs) |
1da177e4 LT |
599 | { |
600 | struct bpt *bp; | |
601 | unsigned long offset; | |
602 | ||
603 | if (in_xmon && catch_memory_errors) | |
604 | handle_fault(regs); /* doesn't return */ | |
605 | ||
606 | if ((regs->msr & (MSR_IR|MSR_PR|MSR_SF)) == (MSR_IR|MSR_SF)) { | |
607 | bp = in_breakpoint_table(regs->nip, &offset); | |
608 | if (bp != NULL) { | |
609 | regs->nip = bp->address + offset; | |
610 | atomic_dec(&bp->ref_count); | |
611 | } | |
612 | } | |
613 | ||
614 | return 0; | |
615 | } | |
616 | ||
1da177e4 LT |
617 | static struct bpt *at_breakpoint(unsigned long pc) |
618 | { | |
619 | int i; | |
620 | struct bpt *bp; | |
621 | ||
622 | bp = bpts; | |
623 | for (i = 0; i < NBPTS; ++i, ++bp) | |
624 | if (bp->enabled && pc == bp->address) | |
625 | return bp; | |
626 | return NULL; | |
627 | } | |
628 | ||
629 | static struct bpt *in_breakpoint_table(unsigned long nip, unsigned long *offp) | |
630 | { | |
631 | unsigned long off; | |
632 | ||
633 | off = nip - (unsigned long) bpts; | |
634 | if (off >= sizeof(bpts)) | |
635 | return NULL; | |
636 | off %= sizeof(struct bpt); | |
637 | if (off != offsetof(struct bpt, instr[0]) | |
638 | && off != offsetof(struct bpt, instr[1])) | |
639 | return NULL; | |
640 | *offp = off - offsetof(struct bpt, instr[0]); | |
641 | return (struct bpt *) (nip - off); | |
642 | } | |
643 | ||
644 | static struct bpt *new_breakpoint(unsigned long a) | |
645 | { | |
646 | struct bpt *bp; | |
647 | ||
648 | a &= ~3UL; | |
649 | bp = at_breakpoint(a); | |
650 | if (bp) | |
651 | return bp; | |
652 | ||
653 | for (bp = bpts; bp < &bpts[NBPTS]; ++bp) { | |
654 | if (!bp->enabled && atomic_read(&bp->ref_count) == 0) { | |
655 | bp->address = a; | |
656 | bp->instr[1] = bpinstr; | |
657 | store_inst(&bp->instr[1]); | |
658 | return bp; | |
659 | } | |
660 | } | |
661 | ||
662 | printf("Sorry, no free breakpoints. Please clear one first.\n"); | |
663 | return NULL; | |
664 | } | |
665 | ||
666 | static void insert_bpts(void) | |
667 | { | |
668 | int i; | |
669 | struct bpt *bp; | |
670 | ||
671 | bp = bpts; | |
672 | for (i = 0; i < NBPTS; ++i, ++bp) { | |
673 | if ((bp->enabled & (BP_TRAP|BP_IABR)) == 0) | |
674 | continue; | |
675 | if (mread(bp->address, &bp->instr[0], 4) != 4) { | |
676 | printf("Couldn't read instruction at %lx, " | |
677 | "disabling breakpoint there\n", bp->address); | |
678 | bp->enabled = 0; | |
679 | continue; | |
680 | } | |
681 | if (IS_MTMSRD(bp->instr[0]) || IS_RFID(bp->instr[0])) { | |
682 | printf("Breakpoint at %lx is on an mtmsrd or rfid " | |
683 | "instruction, disabling it\n", bp->address); | |
684 | bp->enabled = 0; | |
685 | continue; | |
686 | } | |
687 | store_inst(&bp->instr[0]); | |
688 | if (bp->enabled & BP_IABR) | |
689 | continue; | |
690 | if (mwrite(bp->address, &bpinstr, 4) != 4) { | |
691 | printf("Couldn't write instruction at %lx, " | |
692 | "disabling breakpoint there\n", bp->address); | |
693 | bp->enabled &= ~BP_TRAP; | |
694 | continue; | |
695 | } | |
696 | store_inst((void *)bp->address); | |
697 | } | |
698 | } | |
699 | ||
700 | static void insert_cpu_bpts(void) | |
701 | { | |
702 | if (dabr.enabled) | |
fd9648df | 703 | set_dabr(dabr.address | (dabr.enabled & 7)); |
1da177e4 | 704 | if (iabr && cpu_has_feature(CPU_FTR_IABR)) |
f78541dc | 705 | mtspr(SPRN_IABR, iabr->address |
1da177e4 LT |
706 | | (iabr->enabled & (BP_IABR|BP_IABR_TE))); |
707 | } | |
708 | ||
709 | static void remove_bpts(void) | |
710 | { | |
711 | int i; | |
712 | struct bpt *bp; | |
713 | unsigned instr; | |
714 | ||
715 | bp = bpts; | |
716 | for (i = 0; i < NBPTS; ++i, ++bp) { | |
717 | if ((bp->enabled & (BP_TRAP|BP_IABR)) != BP_TRAP) | |
718 | continue; | |
719 | if (mread(bp->address, &instr, 4) == 4 | |
720 | && instr == bpinstr | |
721 | && mwrite(bp->address, &bp->instr, 4) != 4) | |
722 | printf("Couldn't remove breakpoint at %lx\n", | |
723 | bp->address); | |
724 | else | |
725 | store_inst((void *)bp->address); | |
726 | } | |
727 | } | |
728 | ||
729 | static void remove_cpu_bpts(void) | |
730 | { | |
fd9648df | 731 | set_dabr(0); |
1da177e4 | 732 | if (cpu_has_feature(CPU_FTR_IABR)) |
f78541dc | 733 | mtspr(SPRN_IABR, 0); |
1da177e4 LT |
734 | } |
735 | ||
736 | /* Command interpreting routine */ | |
737 | static char *last_cmd; | |
738 | ||
739 | static int | |
740 | cmds(struct pt_regs *excp) | |
741 | { | |
742 | int cmd = 0; | |
743 | ||
744 | last_cmd = NULL; | |
745 | xmon_regs = excp; | |
26c8af5f OH |
746 | |
747 | if (!xmon_no_auto_backtrace) { | |
748 | xmon_no_auto_backtrace = 1; | |
749 | xmon_show_stack(excp->gpr[1], excp->link, excp->nip); | |
750 | } | |
751 | ||
1da177e4 LT |
752 | for(;;) { |
753 | #ifdef CONFIG_SMP | |
754 | printf("%x:", smp_processor_id()); | |
755 | #endif /* CONFIG_SMP */ | |
756 | printf("mon> "); | |
1da177e4 LT |
757 | flush_input(); |
758 | termch = 0; | |
759 | cmd = skipbl(); | |
760 | if( cmd == '\n' ) { | |
761 | if (last_cmd == NULL) | |
762 | continue; | |
763 | take_input(last_cmd); | |
764 | last_cmd = NULL; | |
765 | cmd = inchar(); | |
766 | } | |
767 | switch (cmd) { | |
768 | case 'm': | |
769 | cmd = inchar(); | |
770 | switch (cmd) { | |
771 | case 'm': | |
772 | case 's': | |
773 | case 'd': | |
774 | memops(cmd); | |
775 | break; | |
776 | case 'l': | |
777 | memlocate(); | |
778 | break; | |
779 | case 'z': | |
780 | memzcan(); | |
781 | break; | |
782 | case 'i': | |
783 | show_mem(); | |
784 | break; | |
785 | default: | |
786 | termch = cmd; | |
787 | memex(); | |
788 | } | |
789 | break; | |
790 | case 'd': | |
791 | dump(); | |
792 | break; | |
793 | case 'l': | |
794 | symbol_lookup(); | |
795 | break; | |
796 | case 'r': | |
797 | prregs(excp); /* print regs */ | |
798 | break; | |
799 | case 'e': | |
800 | excprint(excp); | |
801 | break; | |
802 | case 'S': | |
803 | super_regs(); | |
804 | break; | |
805 | case 't': | |
806 | backtrace(excp); | |
807 | break; | |
808 | case 'f': | |
809 | cacheflush(); | |
810 | break; | |
811 | case 's': | |
812 | if (do_step(excp)) | |
813 | return cmd; | |
814 | break; | |
815 | case 'x': | |
816 | case 'X': | |
bb6b9b28 | 817 | return cmd; |
1da177e4 | 818 | case EOF: |
bb6b9b28 BH |
819 | printf(" <no input ...>\n"); |
820 | mdelay(2000); | |
1da177e4 LT |
821 | return cmd; |
822 | case '?': | |
823 | printf(help_string); | |
824 | break; | |
1da177e4 LT |
825 | case 'b': |
826 | bpt_cmds(); | |
827 | break; | |
828 | case 'C': | |
829 | csum(); | |
830 | break; | |
831 | case 'c': | |
832 | if (cpu_cmd()) | |
833 | return 0; | |
834 | break; | |
835 | case 'z': | |
836 | bootcmds(); | |
837 | break; | |
f78541dc PM |
838 | case 'p': |
839 | proccall(); | |
1da177e4 | 840 | break; |
f78541dc | 841 | #ifdef CONFIG_PPC_STD_MMU |
1da177e4 LT |
842 | case 'u': |
843 | dump_segments(); | |
844 | break; | |
f78541dc | 845 | #endif |
1da177e4 LT |
846 | default: |
847 | printf("Unrecognized command: "); | |
848 | do { | |
849 | if (' ' < cmd && cmd <= '~') | |
850 | putchar(cmd); | |
851 | else | |
852 | printf("\\x%x", cmd); | |
853 | cmd = inchar(); | |
854 | } while (cmd != '\n'); | |
855 | printf(" (type ? for help)\n"); | |
856 | break; | |
857 | } | |
858 | } | |
859 | } | |
860 | ||
861 | /* | |
862 | * Step a single instruction. | |
863 | * Some instructions we emulate, others we execute with MSR_SE set. | |
864 | */ | |
865 | static int do_step(struct pt_regs *regs) | |
866 | { | |
867 | unsigned int instr; | |
868 | int stepped; | |
869 | ||
870 | /* check we are in 64-bit kernel mode, translation enabled */ | |
871 | if ((regs->msr & (MSR_SF|MSR_PR|MSR_IR)) == (MSR_SF|MSR_IR)) { | |
872 | if (mread(regs->nip, &instr, 4) == 4) { | |
873 | stepped = emulate_step(regs, instr); | |
874 | if (stepped < 0) { | |
875 | printf("Couldn't single-step %s instruction\n", | |
876 | (IS_RFID(instr)? "rfid": "mtmsrd")); | |
877 | return 0; | |
878 | } | |
879 | if (stepped > 0) { | |
880 | regs->trap = 0xd00 | (regs->trap & 1); | |
881 | printf("stepped to "); | |
882 | xmon_print_symbol(regs->nip, " ", "\n"); | |
883 | ppc_inst_dump(regs->nip, 1, 0); | |
884 | return 0; | |
885 | } | |
886 | } | |
887 | } | |
888 | regs->msr |= MSR_SE; | |
889 | return 1; | |
890 | } | |
891 | ||
892 | static void bootcmds(void) | |
893 | { | |
894 | int cmd; | |
895 | ||
896 | cmd = inchar(); | |
897 | if (cmd == 'r') | |
898 | ppc_md.restart(NULL); | |
899 | else if (cmd == 'h') | |
900 | ppc_md.halt(); | |
901 | else if (cmd == 'p') | |
902 | ppc_md.power_off(); | |
903 | } | |
904 | ||
905 | static int cpu_cmd(void) | |
906 | { | |
907 | #ifdef CONFIG_SMP | |
908 | unsigned long cpu; | |
909 | int timeout; | |
910 | int count; | |
911 | ||
912 | if (!scanhex(&cpu)) { | |
913 | /* print cpus waiting or in xmon */ | |
914 | printf("cpus stopped:"); | |
915 | count = 0; | |
916 | for (cpu = 0; cpu < NR_CPUS; ++cpu) { | |
917 | if (cpu_isset(cpu, cpus_in_xmon)) { | |
918 | if (count == 0) | |
919 | printf(" %x", cpu); | |
920 | ++count; | |
921 | } else { | |
922 | if (count > 1) | |
923 | printf("-%x", cpu - 1); | |
924 | count = 0; | |
925 | } | |
926 | } | |
927 | if (count > 1) | |
928 | printf("-%x", NR_CPUS - 1); | |
929 | printf("\n"); | |
930 | return 0; | |
931 | } | |
932 | /* try to switch to cpu specified */ | |
933 | if (!cpu_isset(cpu, cpus_in_xmon)) { | |
934 | printf("cpu 0x%x isn't in xmon\n", cpu); | |
935 | return 0; | |
936 | } | |
937 | xmon_taken = 0; | |
938 | mb(); | |
939 | xmon_owner = cpu; | |
940 | timeout = 10000000; | |
941 | while (!xmon_taken) { | |
942 | if (--timeout == 0) { | |
943 | if (test_and_set_bit(0, &xmon_taken)) | |
944 | break; | |
945 | /* take control back */ | |
946 | mb(); | |
947 | xmon_owner = smp_processor_id(); | |
948 | printf("cpu %u didn't take control\n", cpu); | |
949 | return 0; | |
950 | } | |
951 | barrier(); | |
952 | } | |
953 | return 1; | |
954 | #else | |
955 | return 0; | |
956 | #endif /* CONFIG_SMP */ | |
957 | } | |
958 | ||
959 | static unsigned short fcstab[256] = { | |
960 | 0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf, | |
961 | 0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7, | |
962 | 0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e, | |
963 | 0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876, | |
964 | 0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd, | |
965 | 0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5, | |
966 | 0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c, | |
967 | 0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974, | |
968 | 0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb, | |
969 | 0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3, | |
970 | 0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a, | |
971 | 0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72, | |
972 | 0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9, | |
973 | 0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1, | |
974 | 0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738, | |
975 | 0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70, | |
976 | 0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7, | |
977 | 0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff, | |
978 | 0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036, | |
979 | 0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e, | |
980 | 0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5, | |
981 | 0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd, | |
982 | 0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134, | |
983 | 0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c, | |
984 | 0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3, | |
985 | 0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb, | |
986 | 0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232, | |
987 | 0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a, | |
988 | 0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1, | |
989 | 0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9, | |
990 | 0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330, | |
991 | 0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78 | |
992 | }; | |
993 | ||
994 | #define FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff]) | |
995 | ||
996 | static void | |
997 | csum(void) | |
998 | { | |
999 | unsigned int i; | |
1000 | unsigned short fcs; | |
1001 | unsigned char v; | |
1002 | ||
1003 | if (!scanhex(&adrs)) | |
1004 | return; | |
1005 | if (!scanhex(&ncsum)) | |
1006 | return; | |
1007 | fcs = 0xffff; | |
1008 | for (i = 0; i < ncsum; ++i) { | |
1009 | if (mread(adrs+i, &v, 1) == 0) { | |
1010 | printf("csum stopped at %x\n", adrs+i); | |
1011 | break; | |
1012 | } | |
1013 | fcs = FCS(fcs, v); | |
1014 | } | |
1015 | printf("%x\n", fcs); | |
1016 | } | |
1017 | ||
1018 | /* | |
1019 | * Check if this is a suitable place to put a breakpoint. | |
1020 | */ | |
1021 | static long check_bp_loc(unsigned long addr) | |
1022 | { | |
1023 | unsigned int instr; | |
1024 | ||
1025 | addr &= ~3; | |
51fae6de | 1026 | if (!is_kernel_addr(addr)) { |
1da177e4 LT |
1027 | printf("Breakpoints may only be placed at kernel addresses\n"); |
1028 | return 0; | |
1029 | } | |
1030 | if (!mread(addr, &instr, sizeof(instr))) { | |
1031 | printf("Can't read instruction at address %lx\n", addr); | |
1032 | return 0; | |
1033 | } | |
1034 | if (IS_MTMSRD(instr) || IS_RFID(instr)) { | |
1035 | printf("Breakpoints may not be placed on mtmsrd or rfid " | |
1036 | "instructions\n"); | |
1037 | return 0; | |
1038 | } | |
1039 | return 1; | |
1040 | } | |
1041 | ||
1042 | static char *breakpoint_help_string = | |
1043 | "Breakpoint command usage:\n" | |
1044 | "b show breakpoints\n" | |
1045 | "b <addr> [cnt] set breakpoint at given instr addr\n" | |
1046 | "bc clear all breakpoints\n" | |
1047 | "bc <n/addr> clear breakpoint number n or at addr\n" | |
1048 | "bi <addr> [cnt] set hardware instr breakpoint (POWER3/RS64 only)\n" | |
1049 | "bd <addr> [cnt] set hardware data breakpoint\n" | |
1050 | ""; | |
1051 | ||
1052 | static void | |
1053 | bpt_cmds(void) | |
1054 | { | |
1055 | int cmd; | |
1056 | unsigned long a; | |
1057 | int mode, i; | |
1058 | struct bpt *bp; | |
1059 | const char badaddr[] = "Only kernel addresses are permitted " | |
1060 | "for breakpoints\n"; | |
1061 | ||
1062 | cmd = inchar(); | |
1063 | switch (cmd) { | |
f78541dc | 1064 | #ifndef CONFIG_8xx |
1da177e4 LT |
1065 | case 'd': /* bd - hardware data breakpoint */ |
1066 | mode = 7; | |
1067 | cmd = inchar(); | |
1068 | if (cmd == 'r') | |
1069 | mode = 5; | |
1070 | else if (cmd == 'w') | |
1071 | mode = 6; | |
1072 | else | |
1073 | termch = cmd; | |
1074 | dabr.address = 0; | |
1075 | dabr.enabled = 0; | |
1076 | if (scanhex(&dabr.address)) { | |
51fae6de | 1077 | if (!is_kernel_addr(dabr.address)) { |
1da177e4 LT |
1078 | printf(badaddr); |
1079 | break; | |
1080 | } | |
1081 | dabr.address &= ~7; | |
1082 | dabr.enabled = mode | BP_DABR; | |
1083 | } | |
1084 | break; | |
1085 | ||
1086 | case 'i': /* bi - hardware instr breakpoint */ | |
1087 | if (!cpu_has_feature(CPU_FTR_IABR)) { | |
1088 | printf("Hardware instruction breakpoint " | |
1089 | "not supported on this cpu\n"); | |
1090 | break; | |
1091 | } | |
1092 | if (iabr) { | |
1093 | iabr->enabled &= ~(BP_IABR | BP_IABR_TE); | |
1094 | iabr = NULL; | |
1095 | } | |
1096 | if (!scanhex(&a)) | |
1097 | break; | |
1098 | if (!check_bp_loc(a)) | |
1099 | break; | |
1100 | bp = new_breakpoint(a); | |
1101 | if (bp != NULL) { | |
1102 | bp->enabled |= BP_IABR | BP_IABR_TE; | |
1103 | iabr = bp; | |
1104 | } | |
1105 | break; | |
f78541dc | 1106 | #endif |
1da177e4 LT |
1107 | |
1108 | case 'c': | |
1109 | if (!scanhex(&a)) { | |
1110 | /* clear all breakpoints */ | |
1111 | for (i = 0; i < NBPTS; ++i) | |
1112 | bpts[i].enabled = 0; | |
1113 | iabr = NULL; | |
1114 | dabr.enabled = 0; | |
1115 | printf("All breakpoints cleared\n"); | |
1116 | break; | |
1117 | } | |
1118 | ||
1119 | if (a <= NBPTS && a >= 1) { | |
1120 | /* assume a breakpoint number */ | |
1121 | bp = &bpts[a-1]; /* bp nums are 1 based */ | |
1122 | } else { | |
1123 | /* assume a breakpoint address */ | |
1124 | bp = at_breakpoint(a); | |
1125 | if (bp == 0) { | |
1126 | printf("No breakpoint at %x\n", a); | |
1127 | break; | |
1128 | } | |
1129 | } | |
1130 | ||
1131 | printf("Cleared breakpoint %x (", BP_NUM(bp)); | |
1132 | xmon_print_symbol(bp->address, " ", ")\n"); | |
1133 | bp->enabled = 0; | |
1134 | break; | |
1135 | ||
1136 | default: | |
1137 | termch = cmd; | |
1138 | cmd = skipbl(); | |
1139 | if (cmd == '?') { | |
1140 | printf(breakpoint_help_string); | |
1141 | break; | |
1142 | } | |
1143 | termch = cmd; | |
1144 | if (!scanhex(&a)) { | |
1145 | /* print all breakpoints */ | |
1146 | printf(" type address\n"); | |
1147 | if (dabr.enabled) { | |
f78541dc | 1148 | printf(" data "REG" [", dabr.address); |
1da177e4 LT |
1149 | if (dabr.enabled & 1) |
1150 | printf("r"); | |
1151 | if (dabr.enabled & 2) | |
1152 | printf("w"); | |
1153 | printf("]\n"); | |
1154 | } | |
1155 | for (bp = bpts; bp < &bpts[NBPTS]; ++bp) { | |
1156 | if (!bp->enabled) | |
1157 | continue; | |
1158 | printf("%2x %s ", BP_NUM(bp), | |
1159 | (bp->enabled & BP_IABR)? "inst": "trap"); | |
1160 | xmon_print_symbol(bp->address, " ", "\n"); | |
1161 | } | |
1162 | break; | |
1163 | } | |
1164 | ||
1165 | if (!check_bp_loc(a)) | |
1166 | break; | |
1167 | bp = new_breakpoint(a); | |
1168 | if (bp != NULL) | |
1169 | bp->enabled |= BP_TRAP; | |
1170 | break; | |
1171 | } | |
1172 | } | |
1173 | ||
1174 | /* Very cheap human name for vector lookup. */ | |
1175 | static | |
1176 | const char *getvecname(unsigned long vec) | |
1177 | { | |
1178 | char *ret; | |
1179 | ||
1180 | switch (vec) { | |
1181 | case 0x100: ret = "(System Reset)"; break; | |
1182 | case 0x200: ret = "(Machine Check)"; break; | |
1183 | case 0x300: ret = "(Data Access)"; break; | |
1184 | case 0x380: ret = "(Data SLB Access)"; break; | |
1185 | case 0x400: ret = "(Instruction Access)"; break; | |
1186 | case 0x480: ret = "(Instruction SLB Access)"; break; | |
1187 | case 0x500: ret = "(Hardware Interrupt)"; break; | |
1188 | case 0x600: ret = "(Alignment)"; break; | |
1189 | case 0x700: ret = "(Program Check)"; break; | |
1190 | case 0x800: ret = "(FPU Unavailable)"; break; | |
1191 | case 0x900: ret = "(Decrementer)"; break; | |
1192 | case 0xc00: ret = "(System Call)"; break; | |
1193 | case 0xd00: ret = "(Single Step)"; break; | |
1194 | case 0xf00: ret = "(Performance Monitor)"; break; | |
1195 | case 0xf20: ret = "(Altivec Unavailable)"; break; | |
1196 | case 0x1300: ret = "(Instruction Breakpoint)"; break; | |
1197 | default: ret = ""; | |
1198 | } | |
1199 | return ret; | |
1200 | } | |
1201 | ||
1202 | static void get_function_bounds(unsigned long pc, unsigned long *startp, | |
1203 | unsigned long *endp) | |
1204 | { | |
1205 | unsigned long size, offset; | |
1206 | const char *name; | |
1207 | char *modname; | |
1208 | ||
1209 | *startp = *endp = 0; | |
1210 | if (pc == 0) | |
1211 | return; | |
1212 | if (setjmp(bus_error_jmp) == 0) { | |
1213 | catch_memory_errors = 1; | |
1214 | sync(); | |
1215 | name = kallsyms_lookup(pc, &size, &offset, &modname, tmpstr); | |
1216 | if (name != NULL) { | |
1217 | *startp = pc - offset; | |
1218 | *endp = pc - offset + size; | |
1219 | } | |
1220 | sync(); | |
1221 | } | |
1222 | catch_memory_errors = 0; | |
1223 | } | |
1224 | ||
1225 | static int xmon_depth_to_print = 64; | |
1226 | ||
f78541dc PM |
1227 | #ifdef CONFIG_PPC64 |
1228 | #define LRSAVE_OFFSET 0x10 | |
1229 | #define REG_FRAME_MARKER 0x7265677368657265ul /* "regshere" */ | |
1230 | #define MARKER_OFFSET 0x60 | |
1231 | #define REGS_OFFSET 0x70 | |
1232 | #else | |
1233 | #define LRSAVE_OFFSET 4 | |
1234 | #define REG_FRAME_MARKER 0x72656773 | |
1235 | #define MARKER_OFFSET 8 | |
1236 | #define REGS_OFFSET 16 | |
1237 | #endif | |
1238 | ||
1da177e4 LT |
1239 | static void xmon_show_stack(unsigned long sp, unsigned long lr, |
1240 | unsigned long pc) | |
1241 | { | |
1242 | unsigned long ip; | |
1243 | unsigned long newsp; | |
1244 | unsigned long marker; | |
1245 | int count = 0; | |
1246 | struct pt_regs regs; | |
1247 | ||
1248 | do { | |
1249 | if (sp < PAGE_OFFSET) { | |
1250 | if (sp != 0) | |
1251 | printf("SP (%lx) is in userspace\n", sp); | |
1252 | break; | |
1253 | } | |
1254 | ||
f78541dc | 1255 | if (!mread(sp + LRSAVE_OFFSET, &ip, sizeof(unsigned long)) |
1da177e4 LT |
1256 | || !mread(sp, &newsp, sizeof(unsigned long))) { |
1257 | printf("Couldn't read stack frame at %lx\n", sp); | |
1258 | break; | |
1259 | } | |
1260 | ||
1261 | /* | |
1262 | * For the first stack frame, try to work out if | |
1263 | * LR and/or the saved LR value in the bottommost | |
1264 | * stack frame are valid. | |
1265 | */ | |
1266 | if ((pc | lr) != 0) { | |
1267 | unsigned long fnstart, fnend; | |
1268 | unsigned long nextip; | |
1269 | int printip = 1; | |
1270 | ||
1271 | get_function_bounds(pc, &fnstart, &fnend); | |
1272 | nextip = 0; | |
1273 | if (newsp > sp) | |
f78541dc | 1274 | mread(newsp + LRSAVE_OFFSET, &nextip, |
1da177e4 LT |
1275 | sizeof(unsigned long)); |
1276 | if (lr == ip) { | |
1277 | if (lr < PAGE_OFFSET | |
1278 | || (fnstart <= lr && lr < fnend)) | |
1279 | printip = 0; | |
1280 | } else if (lr == nextip) { | |
1281 | printip = 0; | |
1282 | } else if (lr >= PAGE_OFFSET | |
1283 | && !(fnstart <= lr && lr < fnend)) { | |
1284 | printf("[link register ] "); | |
1285 | xmon_print_symbol(lr, " ", "\n"); | |
1286 | } | |
1287 | if (printip) { | |
f78541dc | 1288 | printf("["REG"] ", sp); |
1da177e4 LT |
1289 | xmon_print_symbol(ip, " ", " (unreliable)\n"); |
1290 | } | |
1291 | pc = lr = 0; | |
1292 | ||
1293 | } else { | |
f78541dc | 1294 | printf("["REG"] ", sp); |
1da177e4 LT |
1295 | xmon_print_symbol(ip, " ", "\n"); |
1296 | } | |
1297 | ||
1298 | /* Look for "regshere" marker to see if this is | |
1299 | an exception frame. */ | |
f78541dc PM |
1300 | if (mread(sp + MARKER_OFFSET, &marker, sizeof(unsigned long)) |
1301 | && marker == REG_FRAME_MARKER) { | |
1302 | if (mread(sp + REGS_OFFSET, ®s, sizeof(regs)) | |
1da177e4 LT |
1303 | != sizeof(regs)) { |
1304 | printf("Couldn't read registers at %lx\n", | |
f78541dc | 1305 | sp + REGS_OFFSET); |
1da177e4 LT |
1306 | break; |
1307 | } | |
1308 | printf("--- Exception: %lx %s at ", regs.trap, | |
1309 | getvecname(TRAP(®s))); | |
1310 | pc = regs.nip; | |
1311 | lr = regs.link; | |
1312 | xmon_print_symbol(pc, " ", "\n"); | |
1313 | } | |
1314 | ||
1315 | if (newsp == 0) | |
1316 | break; | |
1317 | ||
1318 | sp = newsp; | |
1319 | } while (count++ < xmon_depth_to_print); | |
1320 | } | |
1321 | ||
1322 | static void backtrace(struct pt_regs *excp) | |
1323 | { | |
1324 | unsigned long sp; | |
1325 | ||
1326 | if (scanhex(&sp)) | |
1327 | xmon_show_stack(sp, 0, 0); | |
1328 | else | |
1329 | xmon_show_stack(excp->gpr[1], excp->link, excp->nip); | |
1330 | scannl(); | |
1331 | } | |
1332 | ||
1333 | static void print_bug_trap(struct pt_regs *regs) | |
1334 | { | |
1335 | struct bug_entry *bug; | |
1336 | unsigned long addr; | |
1337 | ||
1338 | if (regs->msr & MSR_PR) | |
1339 | return; /* not in kernel */ | |
1340 | addr = regs->nip; /* address of trap instruction */ | |
1341 | if (addr < PAGE_OFFSET) | |
1342 | return; | |
1343 | bug = find_bug(regs->nip); | |
1344 | if (bug == NULL) | |
1345 | return; | |
1346 | if (bug->line & BUG_WARNING_TRAP) | |
1347 | return; | |
1348 | ||
1349 | printf("kernel BUG in %s at %s:%d!\n", | |
1350 | bug->function, bug->file, (unsigned int)bug->line); | |
1351 | } | |
1352 | ||
1353 | void excprint(struct pt_regs *fp) | |
1354 | { | |
1355 | unsigned long trap; | |
1356 | ||
1357 | #ifdef CONFIG_SMP | |
1358 | printf("cpu 0x%x: ", smp_processor_id()); | |
1359 | #endif /* CONFIG_SMP */ | |
1360 | ||
1361 | trap = TRAP(fp); | |
1362 | printf("Vector: %lx %s at [%lx]\n", fp->trap, getvecname(trap), fp); | |
1363 | printf(" pc: "); | |
1364 | xmon_print_symbol(fp->nip, ": ", "\n"); | |
1365 | ||
1366 | printf(" lr: ", fp->link); | |
1367 | xmon_print_symbol(fp->link, ": ", "\n"); | |
1368 | ||
1369 | printf(" sp: %lx\n", fp->gpr[1]); | |
1370 | printf(" msr: %lx\n", fp->msr); | |
1371 | ||
1372 | if (trap == 0x300 || trap == 0x380 || trap == 0x600) { | |
1373 | printf(" dar: %lx\n", fp->dar); | |
1374 | if (trap != 0x380) | |
1375 | printf(" dsisr: %lx\n", fp->dsisr); | |
1376 | } | |
1377 | ||
1378 | printf(" current = 0x%lx\n", current); | |
f78541dc | 1379 | #ifdef CONFIG_PPC64 |
1da177e4 | 1380 | printf(" paca = 0x%lx\n", get_paca()); |
f78541dc | 1381 | #endif |
1da177e4 LT |
1382 | if (current) { |
1383 | printf(" pid = %ld, comm = %s\n", | |
1384 | current->pid, current->comm); | |
1385 | } | |
1386 | ||
1387 | if (trap == 0x700) | |
1388 | print_bug_trap(fp); | |
1389 | } | |
1390 | ||
1391 | void prregs(struct pt_regs *fp) | |
1392 | { | |
f78541dc | 1393 | int n, trap; |
1da177e4 LT |
1394 | unsigned long base; |
1395 | struct pt_regs regs; | |
1396 | ||
1397 | if (scanhex(&base)) { | |
1398 | if (setjmp(bus_error_jmp) == 0) { | |
1399 | catch_memory_errors = 1; | |
1400 | sync(); | |
1401 | regs = *(struct pt_regs *)base; | |
1402 | sync(); | |
1403 | __delay(200); | |
1404 | } else { | |
1405 | catch_memory_errors = 0; | |
f78541dc | 1406 | printf("*** Error reading registers from "REG"\n", |
1da177e4 LT |
1407 | base); |
1408 | return; | |
1409 | } | |
1410 | catch_memory_errors = 0; | |
1411 | fp = ®s; | |
1412 | } | |
1413 | ||
f78541dc | 1414 | #ifdef CONFIG_PPC64 |
1da177e4 LT |
1415 | if (FULL_REGS(fp)) { |
1416 | for (n = 0; n < 16; ++n) | |
f78541dc | 1417 | printf("R%.2ld = "REG" R%.2ld = "REG"\n", |
1da177e4 LT |
1418 | n, fp->gpr[n], n+16, fp->gpr[n+16]); |
1419 | } else { | |
1420 | for (n = 0; n < 7; ++n) | |
f78541dc | 1421 | printf("R%.2ld = "REG" R%.2ld = "REG"\n", |
1da177e4 LT |
1422 | n, fp->gpr[n], n+7, fp->gpr[n+7]); |
1423 | } | |
f78541dc PM |
1424 | #else |
1425 | for (n = 0; n < 32; ++n) { | |
1426 | printf("R%.2d = %.8x%s", n, fp->gpr[n], | |
1427 | (n & 3) == 3? "\n": " "); | |
1428 | if (n == 12 && !FULL_REGS(fp)) { | |
1429 | printf("\n"); | |
1430 | break; | |
1431 | } | |
1432 | } | |
1433 | #endif | |
1da177e4 LT |
1434 | printf("pc = "); |
1435 | xmon_print_symbol(fp->nip, " ", "\n"); | |
1436 | printf("lr = "); | |
1437 | xmon_print_symbol(fp->link, " ", "\n"); | |
f78541dc PM |
1438 | printf("msr = "REG" cr = %.8lx\n", fp->msr, fp->ccr); |
1439 | printf("ctr = "REG" xer = "REG" trap = %4lx\n", | |
1da177e4 | 1440 | fp->ctr, fp->xer, fp->trap); |
f78541dc PM |
1441 | trap = TRAP(fp); |
1442 | if (trap == 0x300 || trap == 0x380 || trap == 0x600) | |
1443 | printf("dar = "REG" dsisr = %.8lx\n", fp->dar, fp->dsisr); | |
1da177e4 LT |
1444 | } |
1445 | ||
1446 | void cacheflush(void) | |
1447 | { | |
1448 | int cmd; | |
1449 | unsigned long nflush; | |
1450 | ||
1451 | cmd = inchar(); | |
1452 | if (cmd != 'i') | |
1453 | termch = cmd; | |
1454 | scanhex((void *)&adrs); | |
1455 | if (termch != '\n') | |
1456 | termch = 0; | |
1457 | nflush = 1; | |
1458 | scanhex(&nflush); | |
1459 | nflush = (nflush + L1_CACHE_BYTES - 1) / L1_CACHE_BYTES; | |
1460 | if (setjmp(bus_error_jmp) == 0) { | |
1461 | catch_memory_errors = 1; | |
1462 | sync(); | |
1463 | ||
1464 | if (cmd != 'i') { | |
1465 | for (; nflush > 0; --nflush, adrs += L1_CACHE_BYTES) | |
1466 | cflush((void *) adrs); | |
1467 | } else { | |
1468 | for (; nflush > 0; --nflush, adrs += L1_CACHE_BYTES) | |
1469 | cinval((void *) adrs); | |
1470 | } | |
1471 | sync(); | |
1472 | /* wait a little while to see if we get a machine check */ | |
1473 | __delay(200); | |
1474 | } | |
1475 | catch_memory_errors = 0; | |
1476 | } | |
1477 | ||
1478 | unsigned long | |
1479 | read_spr(int n) | |
1480 | { | |
1481 | unsigned int instrs[2]; | |
1482 | unsigned long (*code)(void); | |
1da177e4 | 1483 | unsigned long ret = -1UL; |
548ccebc PM |
1484 | #ifdef CONFIG_PPC64 |
1485 | unsigned long opd[3]; | |
1da177e4 | 1486 | |
1da177e4 LT |
1487 | opd[0] = (unsigned long)instrs; |
1488 | opd[1] = 0; | |
1489 | opd[2] = 0; | |
548ccebc PM |
1490 | code = (unsigned long (*)(void)) opd; |
1491 | #else | |
1492 | code = (unsigned long (*)(void)) instrs; | |
1493 | #endif | |
1494 | ||
1495 | /* mfspr r3,n; blr */ | |
1496 | instrs[0] = 0x7c6002a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6); | |
1497 | instrs[1] = 0x4e800020; | |
1da177e4 LT |
1498 | store_inst(instrs); |
1499 | store_inst(instrs+1); | |
1da177e4 LT |
1500 | |
1501 | if (setjmp(bus_error_jmp) == 0) { | |
1502 | catch_memory_errors = 1; | |
1503 | sync(); | |
1504 | ||
1505 | ret = code(); | |
1506 | ||
1507 | sync(); | |
1508 | /* wait a little while to see if we get a machine check */ | |
1509 | __delay(200); | |
1510 | n = size; | |
1511 | } | |
1512 | ||
1513 | return ret; | |
1514 | } | |
1515 | ||
1516 | void | |
1517 | write_spr(int n, unsigned long val) | |
1518 | { | |
1519 | unsigned int instrs[2]; | |
1520 | unsigned long (*code)(unsigned long); | |
548ccebc | 1521 | #ifdef CONFIG_PPC64 |
1da177e4 LT |
1522 | unsigned long opd[3]; |
1523 | ||
1da177e4 LT |
1524 | opd[0] = (unsigned long)instrs; |
1525 | opd[1] = 0; | |
1526 | opd[2] = 0; | |
548ccebc PM |
1527 | code = (unsigned long (*)(unsigned long)) opd; |
1528 | #else | |
1529 | code = (unsigned long (*)(unsigned long)) instrs; | |
1530 | #endif | |
1531 | ||
1532 | instrs[0] = 0x7c6003a6 + ((n & 0x1F) << 16) + ((n & 0x3e0) << 6); | |
1533 | instrs[1] = 0x4e800020; | |
1da177e4 LT |
1534 | store_inst(instrs); |
1535 | store_inst(instrs+1); | |
1da177e4 LT |
1536 | |
1537 | if (setjmp(bus_error_jmp) == 0) { | |
1538 | catch_memory_errors = 1; | |
1539 | sync(); | |
1540 | ||
1541 | code(val); | |
1542 | ||
1543 | sync(); | |
1544 | /* wait a little while to see if we get a machine check */ | |
1545 | __delay(200); | |
1546 | n = size; | |
1547 | } | |
1548 | } | |
1549 | ||
1550 | static unsigned long regno; | |
1551 | extern char exc_prolog; | |
1552 | extern char dec_exc; | |
1553 | ||
f78541dc | 1554 | void super_regs(void) |
1da177e4 LT |
1555 | { |
1556 | int cmd; | |
1557 | unsigned long val; | |
1558 | #ifdef CONFIG_PPC_ISERIES | |
1559 | struct paca_struct *ptrPaca = NULL; | |
1560 | struct lppaca *ptrLpPaca = NULL; | |
1561 | struct ItLpRegSave *ptrLpRegSave = NULL; | |
1562 | #endif | |
1563 | ||
1564 | cmd = skipbl(); | |
1565 | if (cmd == '\n') { | |
1566 | unsigned long sp, toc; | |
1567 | asm("mr %0,1" : "=r" (sp) :); | |
1568 | asm("mr %0,2" : "=r" (toc) :); | |
1569 | ||
f78541dc PM |
1570 | printf("msr = "REG" sprg0= "REG"\n", |
1571 | mfmsr(), mfspr(SPRN_SPRG0)); | |
1572 | printf("pvr = "REG" sprg1= "REG"\n", | |
1573 | mfspr(SPRN_PVR), mfspr(SPRN_SPRG1)); | |
1574 | printf("dec = "REG" sprg2= "REG"\n", | |
1575 | mfspr(SPRN_DEC), mfspr(SPRN_SPRG2)); | |
1576 | printf("sp = "REG" sprg3= "REG"\n", sp, mfspr(SPRN_SPRG3)); | |
1577 | printf("toc = "REG" dar = "REG"\n", toc, mfspr(SPRN_DAR)); | |
1da177e4 LT |
1578 | #ifdef CONFIG_PPC_ISERIES |
1579 | // Dump out relevant Paca data areas. | |
1580 | printf("Paca: \n"); | |
1581 | ptrPaca = get_paca(); | |
1582 | ||
1583 | printf(" Local Processor Control Area (LpPaca): \n"); | |
1584 | ptrLpPaca = ptrPaca->lppaca_ptr; | |
1585 | printf(" Saved Srr0=%.16lx Saved Srr1=%.16lx \n", | |
1586 | ptrLpPaca->saved_srr0, ptrLpPaca->saved_srr1); | |
1587 | printf(" Saved Gpr3=%.16lx Saved Gpr4=%.16lx \n", | |
1588 | ptrLpPaca->saved_gpr3, ptrLpPaca->saved_gpr4); | |
1589 | printf(" Saved Gpr5=%.16lx \n", ptrLpPaca->saved_gpr5); | |
1590 | ||
1591 | printf(" Local Processor Register Save Area (LpRegSave): \n"); | |
1592 | ptrLpRegSave = ptrPaca->reg_save_ptr; | |
1593 | printf(" Saved Sprg0=%.16lx Saved Sprg1=%.16lx \n", | |
1594 | ptrLpRegSave->xSPRG0, ptrLpRegSave->xSPRG0); | |
1595 | printf(" Saved Sprg2=%.16lx Saved Sprg3=%.16lx \n", | |
1596 | ptrLpRegSave->xSPRG2, ptrLpRegSave->xSPRG3); | |
1597 | printf(" Saved Msr =%.16lx Saved Nia =%.16lx \n", | |
1598 | ptrLpRegSave->xMSR, ptrLpRegSave->xNIA); | |
1599 | #endif | |
1600 | ||
1601 | return; | |
1602 | } | |
1603 | ||
1604 | scanhex(®no); | |
1605 | switch (cmd) { | |
1606 | case 'w': | |
1607 | val = read_spr(regno); | |
1608 | scanhex(&val); | |
1609 | write_spr(regno, val); | |
1610 | /* fall through */ | |
1611 | case 'r': | |
1612 | printf("spr %lx = %lx\n", regno, read_spr(regno)); | |
1613 | break; | |
1da177e4 LT |
1614 | } |
1615 | scannl(); | |
1616 | } | |
1617 | ||
1618 | /* | |
1619 | * Stuff for reading and writing memory safely | |
1620 | */ | |
1621 | int | |
1622 | mread(unsigned long adrs, void *buf, int size) | |
1623 | { | |
1624 | volatile int n; | |
1625 | char *p, *q; | |
1626 | ||
1627 | n = 0; | |
1628 | if (setjmp(bus_error_jmp) == 0) { | |
1629 | catch_memory_errors = 1; | |
1630 | sync(); | |
1631 | p = (char *)adrs; | |
1632 | q = (char *)buf; | |
1633 | switch (size) { | |
1634 | case 2: | |
f78541dc | 1635 | *(u16 *)q = *(u16 *)p; |
1da177e4 LT |
1636 | break; |
1637 | case 4: | |
f78541dc | 1638 | *(u32 *)q = *(u32 *)p; |
1da177e4 LT |
1639 | break; |
1640 | case 8: | |
f78541dc | 1641 | *(u64 *)q = *(u64 *)p; |
1da177e4 LT |
1642 | break; |
1643 | default: | |
1644 | for( ; n < size; ++n) { | |
1645 | *q++ = *p++; | |
1646 | sync(); | |
1647 | } | |
1648 | } | |
1649 | sync(); | |
1650 | /* wait a little while to see if we get a machine check */ | |
1651 | __delay(200); | |
1652 | n = size; | |
1653 | } | |
1654 | catch_memory_errors = 0; | |
1655 | return n; | |
1656 | } | |
1657 | ||
1658 | int | |
1659 | mwrite(unsigned long adrs, void *buf, int size) | |
1660 | { | |
1661 | volatile int n; | |
1662 | char *p, *q; | |
1663 | ||
1664 | n = 0; | |
1665 | if (setjmp(bus_error_jmp) == 0) { | |
1666 | catch_memory_errors = 1; | |
1667 | sync(); | |
1668 | p = (char *) adrs; | |
1669 | q = (char *) buf; | |
1670 | switch (size) { | |
1671 | case 2: | |
f78541dc | 1672 | *(u16 *)p = *(u16 *)q; |
1da177e4 LT |
1673 | break; |
1674 | case 4: | |
f78541dc | 1675 | *(u32 *)p = *(u32 *)q; |
1da177e4 LT |
1676 | break; |
1677 | case 8: | |
f78541dc | 1678 | *(u64 *)p = *(u64 *)q; |
1da177e4 LT |
1679 | break; |
1680 | default: | |
1681 | for ( ; n < size; ++n) { | |
1682 | *p++ = *q++; | |
1683 | sync(); | |
1684 | } | |
1685 | } | |
1686 | sync(); | |
1687 | /* wait a little while to see if we get a machine check */ | |
1688 | __delay(200); | |
1689 | n = size; | |
1690 | } else { | |
1691 | printf("*** Error writing address %x\n", adrs + n); | |
1692 | } | |
1693 | catch_memory_errors = 0; | |
1694 | return n; | |
1695 | } | |
1696 | ||
1697 | static int fault_type; | |
f78541dc | 1698 | static int fault_except; |
1da177e4 LT |
1699 | static char *fault_chars[] = { "--", "**", "##" }; |
1700 | ||
f78541dc | 1701 | static int handle_fault(struct pt_regs *regs) |
1da177e4 | 1702 | { |
f78541dc | 1703 | fault_except = TRAP(regs); |
1da177e4 LT |
1704 | switch (TRAP(regs)) { |
1705 | case 0x200: | |
1706 | fault_type = 0; | |
1707 | break; | |
1708 | case 0x300: | |
1709 | case 0x380: | |
1710 | fault_type = 1; | |
1711 | break; | |
1712 | default: | |
1713 | fault_type = 2; | |
1714 | } | |
1715 | ||
1716 | longjmp(bus_error_jmp, 1); | |
1717 | ||
1718 | return 0; | |
1719 | } | |
1720 | ||
1721 | #define SWAP(a, b, t) ((t) = (a), (a) = (b), (b) = (t)) | |
1722 | ||
1723 | void | |
1724 | byterev(unsigned char *val, int size) | |
1725 | { | |
1726 | int t; | |
1727 | ||
1728 | switch (size) { | |
1729 | case 2: | |
1730 | SWAP(val[0], val[1], t); | |
1731 | break; | |
1732 | case 4: | |
1733 | SWAP(val[0], val[3], t); | |
1734 | SWAP(val[1], val[2], t); | |
1735 | break; | |
1736 | case 8: /* is there really any use for this? */ | |
1737 | SWAP(val[0], val[7], t); | |
1738 | SWAP(val[1], val[6], t); | |
1739 | SWAP(val[2], val[5], t); | |
1740 | SWAP(val[3], val[4], t); | |
1741 | break; | |
1742 | } | |
1743 | } | |
1744 | ||
1745 | static int brev; | |
1746 | static int mnoread; | |
1747 | ||
1748 | static char *memex_help_string = | |
1749 | "Memory examine command usage:\n" | |
1750 | "m [addr] [flags] examine/change memory\n" | |
1751 | " addr is optional. will start where left off.\n" | |
1752 | " flags may include chars from this set:\n" | |
1753 | " b modify by bytes (default)\n" | |
1754 | " w modify by words (2 byte)\n" | |
1755 | " l modify by longs (4 byte)\n" | |
1756 | " d modify by doubleword (8 byte)\n" | |
1757 | " r toggle reverse byte order mode\n" | |
1758 | " n do not read memory (for i/o spaces)\n" | |
1759 | " . ok to read (default)\n" | |
1760 | "NOTE: flags are saved as defaults\n" | |
1761 | ""; | |
1762 | ||
1763 | static char *memex_subcmd_help_string = | |
1764 | "Memory examine subcommands:\n" | |
1765 | " hexval write this val to current location\n" | |
1766 | " 'string' write chars from string to this location\n" | |
1767 | " ' increment address\n" | |
1768 | " ^ decrement address\n" | |
1769 | " / increment addr by 0x10. //=0x100, ///=0x1000, etc\n" | |
1770 | " \\ decrement addr by 0x10. \\\\=0x100, \\\\\\=0x1000, etc\n" | |
1771 | " ` clear no-read flag\n" | |
1772 | " ; stay at this addr\n" | |
1773 | " v change to byte mode\n" | |
1774 | " w change to word (2 byte) mode\n" | |
1775 | " l change to long (4 byte) mode\n" | |
1776 | " u change to doubleword (8 byte) mode\n" | |
1777 | " m addr change current addr\n" | |
1778 | " n toggle no-read flag\n" | |
1779 | " r toggle byte reverse flag\n" | |
1780 | " < count back up count bytes\n" | |
1781 | " > count skip forward count bytes\n" | |
1782 | " x exit this mode\n" | |
1783 | ""; | |
1784 | ||
1785 | void | |
1786 | memex(void) | |
1787 | { | |
1788 | int cmd, inc, i, nslash; | |
1789 | unsigned long n; | |
1790 | unsigned char val[16]; | |
1791 | ||
1792 | scanhex((void *)&adrs); | |
1793 | cmd = skipbl(); | |
1794 | if (cmd == '?') { | |
1795 | printf(memex_help_string); | |
1796 | return; | |
1797 | } else { | |
1798 | termch = cmd; | |
1799 | } | |
1800 | last_cmd = "m\n"; | |
1801 | while ((cmd = skipbl()) != '\n') { | |
1802 | switch( cmd ){ | |
1803 | case 'b': size = 1; break; | |
1804 | case 'w': size = 2; break; | |
1805 | case 'l': size = 4; break; | |
1806 | case 'd': size = 8; break; | |
1807 | case 'r': brev = !brev; break; | |
1808 | case 'n': mnoread = 1; break; | |
1809 | case '.': mnoread = 0; break; | |
1810 | } | |
1811 | } | |
1812 | if( size <= 0 ) | |
1813 | size = 1; | |
1814 | else if( size > 8 ) | |
1815 | size = 8; | |
1816 | for(;;){ | |
1817 | if (!mnoread) | |
1818 | n = mread(adrs, val, size); | |
e1449ed9 | 1819 | printf(REG"%c", adrs, brev? 'r': ' '); |
1da177e4 LT |
1820 | if (!mnoread) { |
1821 | if (brev) | |
1822 | byterev(val, size); | |
1823 | putchar(' '); | |
1824 | for (i = 0; i < n; ++i) | |
1825 | printf("%.2x", val[i]); | |
1826 | for (; i < size; ++i) | |
1827 | printf("%s", fault_chars[fault_type]); | |
1828 | } | |
1829 | putchar(' '); | |
1830 | inc = size; | |
1831 | nslash = 0; | |
1832 | for(;;){ | |
1833 | if( scanhex(&n) ){ | |
1834 | for (i = 0; i < size; ++i) | |
1835 | val[i] = n >> (i * 8); | |
1836 | if (!brev) | |
1837 | byterev(val, size); | |
1838 | mwrite(adrs, val, size); | |
1839 | inc = size; | |
1840 | } | |
1841 | cmd = skipbl(); | |
1842 | if (cmd == '\n') | |
1843 | break; | |
1844 | inc = 0; | |
1845 | switch (cmd) { | |
1846 | case '\'': | |
1847 | for(;;){ | |
1848 | n = inchar(); | |
1849 | if( n == '\\' ) | |
1850 | n = bsesc(); | |
1851 | else if( n == '\'' ) | |
1852 | break; | |
1853 | for (i = 0; i < size; ++i) | |
1854 | val[i] = n >> (i * 8); | |
1855 | if (!brev) | |
1856 | byterev(val, size); | |
1857 | mwrite(adrs, val, size); | |
1858 | adrs += size; | |
1859 | } | |
1860 | adrs -= size; | |
1861 | inc = size; | |
1862 | break; | |
1863 | case ',': | |
1864 | adrs += size; | |
1865 | break; | |
1866 | case '.': | |
1867 | mnoread = 0; | |
1868 | break; | |
1869 | case ';': | |
1870 | break; | |
1871 | case 'x': | |
1872 | case EOF: | |
1873 | scannl(); | |
1874 | return; | |
1875 | case 'b': | |
1876 | case 'v': | |
1877 | size = 1; | |
1878 | break; | |
1879 | case 'w': | |
1880 | size = 2; | |
1881 | break; | |
1882 | case 'l': | |
1883 | size = 4; | |
1884 | break; | |
1885 | case 'u': | |
1886 | size = 8; | |
1887 | break; | |
1888 | case '^': | |
1889 | adrs -= size; | |
1890 | break; | |
1891 | break; | |
1892 | case '/': | |
1893 | if (nslash > 0) | |
1894 | adrs -= 1 << nslash; | |
1895 | else | |
1896 | nslash = 0; | |
1897 | nslash += 4; | |
1898 | adrs += 1 << nslash; | |
1899 | break; | |
1900 | case '\\': | |
1901 | if (nslash < 0) | |
1902 | adrs += 1 << -nslash; | |
1903 | else | |
1904 | nslash = 0; | |
1905 | nslash -= 4; | |
1906 | adrs -= 1 << -nslash; | |
1907 | break; | |
1908 | case 'm': | |
1909 | scanhex((void *)&adrs); | |
1910 | break; | |
1911 | case 'n': | |
1912 | mnoread = 1; | |
1913 | break; | |
1914 | case 'r': | |
1915 | brev = !brev; | |
1916 | break; | |
1917 | case '<': | |
1918 | n = size; | |
1919 | scanhex(&n); | |
1920 | adrs -= n; | |
1921 | break; | |
1922 | case '>': | |
1923 | n = size; | |
1924 | scanhex(&n); | |
1925 | adrs += n; | |
1926 | break; | |
1927 | case '?': | |
1928 | printf(memex_subcmd_help_string); | |
1929 | break; | |
1930 | } | |
1931 | } | |
1932 | adrs += inc; | |
1933 | } | |
1934 | } | |
1935 | ||
1936 | int | |
1937 | bsesc(void) | |
1938 | { | |
1939 | int c; | |
1940 | ||
1941 | c = inchar(); | |
1942 | switch( c ){ | |
1943 | case 'n': c = '\n'; break; | |
1944 | case 'r': c = '\r'; break; | |
1945 | case 'b': c = '\b'; break; | |
1946 | case 't': c = '\t'; break; | |
1947 | } | |
1948 | return c; | |
1949 | } | |
1950 | ||
7e5b5938 OH |
1951 | static void xmon_rawdump (unsigned long adrs, long ndump) |
1952 | { | |
1953 | long n, m, r, nr; | |
1954 | unsigned char temp[16]; | |
1955 | ||
1956 | for (n = ndump; n > 0;) { | |
1957 | r = n < 16? n: 16; | |
1958 | nr = mread(adrs, temp, r); | |
1959 | adrs += nr; | |
1960 | for (m = 0; m < r; ++m) { | |
1961 | if (m < nr) | |
1962 | printf("%.2x", temp[m]); | |
1963 | else | |
1964 | printf("%s", fault_chars[fault_type]); | |
1965 | } | |
1966 | n -= r; | |
1967 | if (nr < r) | |
1968 | break; | |
1969 | } | |
1970 | printf("\n"); | |
1971 | } | |
1972 | ||
1da177e4 LT |
1973 | #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ |
1974 | || ('a' <= (c) && (c) <= 'f') \ | |
1975 | || ('A' <= (c) && (c) <= 'F')) | |
1976 | void | |
1977 | dump(void) | |
1978 | { | |
1979 | int c; | |
1980 | ||
1981 | c = inchar(); | |
1982 | if ((isxdigit(c) && c != 'f' && c != 'd') || c == '\n') | |
1983 | termch = c; | |
1984 | scanhex((void *)&adrs); | |
1985 | if (termch != '\n') | |
1986 | termch = 0; | |
1987 | if (c == 'i') { | |
1988 | scanhex(&nidump); | |
1989 | if (nidump == 0) | |
1990 | nidump = 16; | |
1991 | else if (nidump > MAX_DUMP) | |
1992 | nidump = MAX_DUMP; | |
1993 | adrs += ppc_inst_dump(adrs, nidump, 1); | |
1994 | last_cmd = "di\n"; | |
7e5b5938 OH |
1995 | } else if (c == 'r') { |
1996 | scanhex(&ndump); | |
1997 | if (ndump == 0) | |
1998 | ndump = 64; | |
1999 | xmon_rawdump(adrs, ndump); | |
2000 | adrs += ndump; | |
2001 | last_cmd = "dr\n"; | |
1da177e4 LT |
2002 | } else { |
2003 | scanhex(&ndump); | |
2004 | if (ndump == 0) | |
2005 | ndump = 64; | |
2006 | else if (ndump > MAX_DUMP) | |
2007 | ndump = MAX_DUMP; | |
2008 | prdump(adrs, ndump); | |
2009 | adrs += ndump; | |
2010 | last_cmd = "d\n"; | |
2011 | } | |
2012 | } | |
2013 | ||
2014 | void | |
2015 | prdump(unsigned long adrs, long ndump) | |
2016 | { | |
2017 | long n, m, c, r, nr; | |
2018 | unsigned char temp[16]; | |
2019 | ||
2020 | for (n = ndump; n > 0;) { | |
f78541dc | 2021 | printf(REG, adrs); |
1da177e4 LT |
2022 | putchar(' '); |
2023 | r = n < 16? n: 16; | |
2024 | nr = mread(adrs, temp, r); | |
2025 | adrs += nr; | |
2026 | for (m = 0; m < r; ++m) { | |
e1449ed9 PM |
2027 | if ((m & (sizeof(long) - 1)) == 0 && m > 0) |
2028 | putchar(' '); | |
1da177e4 LT |
2029 | if (m < nr) |
2030 | printf("%.2x", temp[m]); | |
2031 | else | |
2032 | printf("%s", fault_chars[fault_type]); | |
2033 | } | |
e1449ed9 PM |
2034 | for (; m < 16; ++m) { |
2035 | if ((m & (sizeof(long) - 1)) == 0) | |
2036 | putchar(' '); | |
1da177e4 | 2037 | printf(" "); |
e1449ed9 | 2038 | } |
1da177e4 LT |
2039 | printf(" |"); |
2040 | for (m = 0; m < r; ++m) { | |
2041 | if (m < nr) { | |
2042 | c = temp[m]; | |
2043 | putchar(' ' <= c && c <= '~'? c: '.'); | |
2044 | } else | |
2045 | putchar(' '); | |
2046 | } | |
2047 | n -= r; | |
2048 | for (; m < 16; ++m) | |
2049 | putchar(' '); | |
2050 | printf("|\n"); | |
2051 | if (nr < r) | |
2052 | break; | |
2053 | } | |
2054 | } | |
2055 | ||
2056 | int | |
2057 | ppc_inst_dump(unsigned long adr, long count, int praddr) | |
2058 | { | |
2059 | int nr, dotted; | |
2060 | unsigned long first_adr; | |
2061 | unsigned long inst, last_inst = 0; | |
2062 | unsigned char val[4]; | |
2063 | ||
2064 | dotted = 0; | |
2065 | for (first_adr = adr; count > 0; --count, adr += 4) { | |
2066 | nr = mread(adr, val, 4); | |
2067 | if (nr == 0) { | |
2068 | if (praddr) { | |
2069 | const char *x = fault_chars[fault_type]; | |
f78541dc | 2070 | printf(REG" %s%s%s%s\n", adr, x, x, x, x); |
1da177e4 LT |
2071 | } |
2072 | break; | |
2073 | } | |
2074 | inst = GETWORD(val); | |
2075 | if (adr > first_adr && inst == last_inst) { | |
2076 | if (!dotted) { | |
2077 | printf(" ...\n"); | |
2078 | dotted = 1; | |
2079 | } | |
2080 | continue; | |
2081 | } | |
2082 | dotted = 0; | |
2083 | last_inst = inst; | |
2084 | if (praddr) | |
f78541dc | 2085 | printf(REG" %.8x", adr, inst); |
1da177e4 LT |
2086 | printf("\t"); |
2087 | print_insn_powerpc(inst, adr, 0); /* always returns 4 */ | |
2088 | printf("\n"); | |
2089 | } | |
2090 | return adr - first_adr; | |
2091 | } | |
2092 | ||
2093 | void | |
2094 | print_address(unsigned long addr) | |
2095 | { | |
2096 | xmon_print_symbol(addr, "\t# ", ""); | |
2097 | } | |
2098 | ||
2099 | ||
2100 | /* | |
2101 | * Memory operations - move, set, print differences | |
2102 | */ | |
2103 | static unsigned long mdest; /* destination address */ | |
2104 | static unsigned long msrc; /* source address */ | |
2105 | static unsigned long mval; /* byte value to set memory to */ | |
2106 | static unsigned long mcount; /* # bytes to affect */ | |
2107 | static unsigned long mdiffs; /* max # differences to print */ | |
2108 | ||
2109 | void | |
2110 | memops(int cmd) | |
2111 | { | |
2112 | scanhex((void *)&mdest); | |
2113 | if( termch != '\n' ) | |
2114 | termch = 0; | |
2115 | scanhex((void *)(cmd == 's'? &mval: &msrc)); | |
2116 | if( termch != '\n' ) | |
2117 | termch = 0; | |
2118 | scanhex((void *)&mcount); | |
2119 | switch( cmd ){ | |
2120 | case 'm': | |
2121 | memmove((void *)mdest, (void *)msrc, mcount); | |
2122 | break; | |
2123 | case 's': | |
2124 | memset((void *)mdest, mval, mcount); | |
2125 | break; | |
2126 | case 'd': | |
2127 | if( termch != '\n' ) | |
2128 | termch = 0; | |
2129 | scanhex((void *)&mdiffs); | |
2130 | memdiffs((unsigned char *)mdest, (unsigned char *)msrc, mcount, mdiffs); | |
2131 | break; | |
2132 | } | |
2133 | } | |
2134 | ||
2135 | void | |
2136 | memdiffs(unsigned char *p1, unsigned char *p2, unsigned nb, unsigned maxpr) | |
2137 | { | |
2138 | unsigned n, prt; | |
2139 | ||
2140 | prt = 0; | |
2141 | for( n = nb; n > 0; --n ) | |
2142 | if( *p1++ != *p2++ ) | |
2143 | if( ++prt <= maxpr ) | |
2144 | printf("%.16x %.2x # %.16x %.2x\n", p1 - 1, | |
2145 | p1[-1], p2 - 1, p2[-1]); | |
2146 | if( prt > maxpr ) | |
2147 | printf("Total of %d differences\n", prt); | |
2148 | } | |
2149 | ||
2150 | static unsigned mend; | |
2151 | static unsigned mask; | |
2152 | ||
2153 | void | |
2154 | memlocate(void) | |
2155 | { | |
2156 | unsigned a, n; | |
2157 | unsigned char val[4]; | |
2158 | ||
2159 | last_cmd = "ml"; | |
2160 | scanhex((void *)&mdest); | |
2161 | if (termch != '\n') { | |
2162 | termch = 0; | |
2163 | scanhex((void *)&mend); | |
2164 | if (termch != '\n') { | |
2165 | termch = 0; | |
2166 | scanhex((void *)&mval); | |
2167 | mask = ~0; | |
2168 | if (termch != '\n') termch = 0; | |
2169 | scanhex((void *)&mask); | |
2170 | } | |
2171 | } | |
2172 | n = 0; | |
2173 | for (a = mdest; a < mend; a += 4) { | |
2174 | if (mread(a, val, 4) == 4 | |
2175 | && ((GETWORD(val) ^ mval) & mask) == 0) { | |
2176 | printf("%.16x: %.16x\n", a, GETWORD(val)); | |
2177 | if (++n >= 10) | |
2178 | break; | |
2179 | } | |
2180 | } | |
2181 | } | |
2182 | ||
2183 | static unsigned long mskip = 0x1000; | |
2184 | static unsigned long mlim = 0xffffffff; | |
2185 | ||
2186 | void | |
2187 | memzcan(void) | |
2188 | { | |
2189 | unsigned char v; | |
2190 | unsigned a; | |
2191 | int ok, ook; | |
2192 | ||
2193 | scanhex(&mdest); | |
2194 | if (termch != '\n') termch = 0; | |
2195 | scanhex(&mskip); | |
2196 | if (termch != '\n') termch = 0; | |
2197 | scanhex(&mlim); | |
2198 | ook = 0; | |
2199 | for (a = mdest; a < mlim; a += mskip) { | |
2200 | ok = mread(a, &v, 1); | |
2201 | if (ok && !ook) { | |
2202 | printf("%.8x .. ", a); | |
1da177e4 LT |
2203 | } else if (!ok && ook) |
2204 | printf("%.8x\n", a - mskip); | |
2205 | ook = ok; | |
2206 | if (a + mskip < a) | |
2207 | break; | |
2208 | } | |
2209 | if (ook) | |
2210 | printf("%.8x\n", a - mskip); | |
2211 | } | |
2212 | ||
f78541dc PM |
2213 | void proccall(void) |
2214 | { | |
2215 | unsigned long args[8]; | |
2216 | unsigned long ret; | |
2217 | int i; | |
2218 | typedef unsigned long (*callfunc_t)(unsigned long, unsigned long, | |
2219 | unsigned long, unsigned long, unsigned long, | |
2220 | unsigned long, unsigned long, unsigned long); | |
2221 | callfunc_t func; | |
2222 | ||
2223 | if (!scanhex(&adrs)) | |
2224 | return; | |
2225 | if (termch != '\n') | |
2226 | termch = 0; | |
2227 | for (i = 0; i < 8; ++i) | |
2228 | args[i] = 0; | |
2229 | for (i = 0; i < 8; ++i) { | |
2230 | if (!scanhex(&args[i]) || termch == '\n') | |
2231 | break; | |
2232 | termch = 0; | |
2233 | } | |
2234 | func = (callfunc_t) adrs; | |
2235 | ret = 0; | |
2236 | if (setjmp(bus_error_jmp) == 0) { | |
2237 | catch_memory_errors = 1; | |
2238 | sync(); | |
2239 | ret = func(args[0], args[1], args[2], args[3], | |
2240 | args[4], args[5], args[6], args[7]); | |
2241 | sync(); | |
2242 | printf("return value is %x\n", ret); | |
2243 | } else { | |
2244 | printf("*** %x exception occurred\n", fault_except); | |
2245 | } | |
2246 | catch_memory_errors = 0; | |
2247 | } | |
2248 | ||
1da177e4 LT |
2249 | /* Input scanning routines */ |
2250 | int | |
2251 | skipbl(void) | |
2252 | { | |
2253 | int c; | |
2254 | ||
2255 | if( termch != 0 ){ | |
2256 | c = termch; | |
2257 | termch = 0; | |
2258 | } else | |
2259 | c = inchar(); | |
2260 | while( c == ' ' || c == '\t' ) | |
2261 | c = inchar(); | |
2262 | return c; | |
2263 | } | |
2264 | ||
2265 | #define N_PTREGS 44 | |
2266 | static char *regnames[N_PTREGS] = { | |
2267 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", | |
2268 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", | |
2269 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", | |
2270 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", | |
f78541dc PM |
2271 | "pc", "msr", "or3", "ctr", "lr", "xer", "ccr", |
2272 | #ifdef CONFIG_PPC64 | |
2273 | "softe", | |
2274 | #else | |
2275 | "mq", | |
2276 | #endif | |
1da177e4 LT |
2277 | "trap", "dar", "dsisr", "res" |
2278 | }; | |
2279 | ||
2280 | int | |
2281 | scanhex(unsigned long *vp) | |
2282 | { | |
2283 | int c, d; | |
2284 | unsigned long v; | |
2285 | ||
2286 | c = skipbl(); | |
2287 | if (c == '%') { | |
2288 | /* parse register name */ | |
2289 | char regname[8]; | |
2290 | int i; | |
2291 | ||
2292 | for (i = 0; i < sizeof(regname) - 1; ++i) { | |
2293 | c = inchar(); | |
2294 | if (!isalnum(c)) { | |
2295 | termch = c; | |
2296 | break; | |
2297 | } | |
2298 | regname[i] = c; | |
2299 | } | |
2300 | regname[i] = 0; | |
2301 | for (i = 0; i < N_PTREGS; ++i) { | |
2302 | if (strcmp(regnames[i], regname) == 0) { | |
2303 | if (xmon_regs == NULL) { | |
2304 | printf("regs not available\n"); | |
2305 | return 0; | |
2306 | } | |
2307 | *vp = ((unsigned long *)xmon_regs)[i]; | |
2308 | return 1; | |
2309 | } | |
2310 | } | |
2311 | printf("invalid register name '%%%s'\n", regname); | |
2312 | return 0; | |
2313 | } | |
2314 | ||
2315 | /* skip leading "0x" if any */ | |
2316 | ||
2317 | if (c == '0') { | |
2318 | c = inchar(); | |
2319 | if (c == 'x') { | |
2320 | c = inchar(); | |
2321 | } else { | |
2322 | d = hexdigit(c); | |
2323 | if (d == EOF) { | |
2324 | termch = c; | |
2325 | *vp = 0; | |
2326 | return 1; | |
2327 | } | |
2328 | } | |
2329 | } else if (c == '$') { | |
2330 | int i; | |
2331 | for (i=0; i<63; i++) { | |
2332 | c = inchar(); | |
2333 | if (isspace(c)) { | |
2334 | termch = c; | |
2335 | break; | |
2336 | } | |
2337 | tmpstr[i] = c; | |
2338 | } | |
2339 | tmpstr[i++] = 0; | |
6879dc13 BH |
2340 | *vp = 0; |
2341 | if (setjmp(bus_error_jmp) == 0) { | |
2342 | catch_memory_errors = 1; | |
2343 | sync(); | |
2344 | *vp = kallsyms_lookup_name(tmpstr); | |
2345 | sync(); | |
2346 | } | |
2347 | catch_memory_errors = 0; | |
1da177e4 LT |
2348 | if (!(*vp)) { |
2349 | printf("unknown symbol '%s'\n", tmpstr); | |
2350 | return 0; | |
2351 | } | |
2352 | return 1; | |
2353 | } | |
2354 | ||
2355 | d = hexdigit(c); | |
2356 | if (d == EOF) { | |
2357 | termch = c; | |
2358 | return 0; | |
2359 | } | |
2360 | v = 0; | |
2361 | do { | |
2362 | v = (v << 4) + d; | |
2363 | c = inchar(); | |
2364 | d = hexdigit(c); | |
2365 | } while (d != EOF); | |
2366 | termch = c; | |
2367 | *vp = v; | |
2368 | return 1; | |
2369 | } | |
2370 | ||
2371 | void | |
2372 | scannl(void) | |
2373 | { | |
2374 | int c; | |
2375 | ||
2376 | c = termch; | |
2377 | termch = 0; | |
2378 | while( c != '\n' ) | |
2379 | c = inchar(); | |
2380 | } | |
2381 | ||
f78541dc | 2382 | int hexdigit(int c) |
1da177e4 LT |
2383 | { |
2384 | if( '0' <= c && c <= '9' ) | |
2385 | return c - '0'; | |
2386 | if( 'A' <= c && c <= 'F' ) | |
2387 | return c - ('A' - 10); | |
2388 | if( 'a' <= c && c <= 'f' ) | |
2389 | return c - ('a' - 10); | |
2390 | return EOF; | |
2391 | } | |
2392 | ||
2393 | void | |
2394 | getstring(char *s, int size) | |
2395 | { | |
2396 | int c; | |
2397 | ||
2398 | c = skipbl(); | |
2399 | do { | |
2400 | if( size > 1 ){ | |
2401 | *s++ = c; | |
2402 | --size; | |
2403 | } | |
2404 | c = inchar(); | |
2405 | } while( c != ' ' && c != '\t' && c != '\n' ); | |
2406 | termch = c; | |
2407 | *s = 0; | |
2408 | } | |
2409 | ||
2410 | static char line[256]; | |
2411 | static char *lineptr; | |
2412 | ||
2413 | void | |
2414 | flush_input(void) | |
2415 | { | |
2416 | lineptr = NULL; | |
2417 | } | |
2418 | ||
2419 | int | |
2420 | inchar(void) | |
2421 | { | |
2422 | if (lineptr == NULL || *lineptr == 0) { | |
fca5dcd4 | 2423 | if (xmon_gets(line, sizeof(line)) == NULL) { |
1da177e4 LT |
2424 | lineptr = NULL; |
2425 | return EOF; | |
2426 | } | |
2427 | lineptr = line; | |
2428 | } | |
2429 | return *lineptr++; | |
2430 | } | |
2431 | ||
2432 | void | |
2433 | take_input(char *str) | |
2434 | { | |
2435 | lineptr = str; | |
2436 | } | |
2437 | ||
2438 | ||
2439 | static void | |
2440 | symbol_lookup(void) | |
2441 | { | |
2442 | int type = inchar(); | |
2443 | unsigned long addr; | |
2444 | static char tmp[64]; | |
2445 | ||
2446 | switch (type) { | |
2447 | case 'a': | |
2448 | if (scanhex(&addr)) | |
2449 | xmon_print_symbol(addr, ": ", "\n"); | |
2450 | termch = 0; | |
2451 | break; | |
2452 | case 's': | |
2453 | getstring(tmp, 64); | |
2454 | if (setjmp(bus_error_jmp) == 0) { | |
2455 | catch_memory_errors = 1; | |
2456 | sync(); | |
2457 | addr = kallsyms_lookup_name(tmp); | |
2458 | if (addr) | |
2459 | printf("%s: %lx\n", tmp, addr); | |
2460 | else | |
2461 | printf("Symbol '%s' not found.\n", tmp); | |
2462 | sync(); | |
2463 | } | |
2464 | catch_memory_errors = 0; | |
2465 | termch = 0; | |
2466 | break; | |
2467 | } | |
2468 | } | |
2469 | ||
2470 | ||
2471 | /* Print an address in numeric and symbolic form (if possible) */ | |
2472 | static void xmon_print_symbol(unsigned long address, const char *mid, | |
2473 | const char *after) | |
2474 | { | |
2475 | char *modname; | |
2476 | const char *name = NULL; | |
2477 | unsigned long offset, size; | |
2478 | ||
f78541dc | 2479 | printf(REG, address); |
1da177e4 LT |
2480 | if (setjmp(bus_error_jmp) == 0) { |
2481 | catch_memory_errors = 1; | |
2482 | sync(); | |
2483 | name = kallsyms_lookup(address, &size, &offset, &modname, | |
2484 | tmpstr); | |
2485 | sync(); | |
2486 | /* wait a little while to see if we get a machine check */ | |
2487 | __delay(200); | |
2488 | } | |
2489 | ||
2490 | catch_memory_errors = 0; | |
2491 | ||
2492 | if (name) { | |
2493 | printf("%s%s+%#lx/%#lx", mid, name, offset, size); | |
2494 | if (modname) | |
2495 | printf(" [%s]", modname); | |
2496 | } | |
2497 | printf("%s", after); | |
2498 | } | |
2499 | ||
f78541dc | 2500 | #ifdef CONFIG_PPC64 |
1da177e4 LT |
2501 | static void dump_slb(void) |
2502 | { | |
2503 | int i; | |
2504 | unsigned long tmp; | |
2505 | ||
2506 | printf("SLB contents of cpu %x\n", smp_processor_id()); | |
2507 | ||
2508 | for (i = 0; i < SLB_NUM_ENTRIES; i++) { | |
2509 | asm volatile("slbmfee %0,%1" : "=r" (tmp) : "r" (i)); | |
2510 | printf("%02d %016lx ", i, tmp); | |
2511 | ||
2512 | asm volatile("slbmfev %0,%1" : "=r" (tmp) : "r" (i)); | |
2513 | printf("%016lx\n", tmp); | |
2514 | } | |
2515 | } | |
2516 | ||
2517 | static void dump_stab(void) | |
2518 | { | |
2519 | int i; | |
2520 | unsigned long *tmp = (unsigned long *)get_paca()->stab_addr; | |
2521 | ||
2522 | printf("Segment table contents of cpu %x\n", smp_processor_id()); | |
2523 | ||
2524 | for (i = 0; i < PAGE_SIZE/16; i++) { | |
2525 | unsigned long a, b; | |
2526 | ||
2527 | a = *tmp++; | |
2528 | b = *tmp++; | |
2529 | ||
2530 | if (a || b) { | |
2531 | printf("%03d %016lx ", i, a); | |
2532 | printf("%016lx\n", b); | |
2533 | } | |
2534 | } | |
2535 | } | |
2536 | ||
f78541dc PM |
2537 | void dump_segments(void) |
2538 | { | |
2539 | if (cpu_has_feature(CPU_FTR_SLB)) | |
2540 | dump_slb(); | |
2541 | else | |
2542 | dump_stab(); | |
2543 | } | |
2544 | #endif | |
2545 | ||
2546 | #ifdef CONFIG_PPC_STD_MMU_32 | |
2547 | void dump_segments(void) | |
2548 | { | |
2549 | int i; | |
2550 | ||
2551 | printf("sr0-15 ="); | |
2552 | for (i = 0; i < 16; ++i) | |
2553 | printf(" %x", mfsrin(i)); | |
2554 | printf("\n"); | |
2555 | } | |
2556 | #endif | |
2557 | ||
b13cfd17 OH |
2558 | void xmon_init(int enable) |
2559 | { | |
2560 | if (enable) { | |
2561 | __debugger = xmon; | |
2562 | __debugger_ipi = xmon_ipi; | |
2563 | __debugger_bpt = xmon_bpt; | |
2564 | __debugger_sstep = xmon_sstep; | |
2565 | __debugger_iabr_match = xmon_iabr_match; | |
2566 | __debugger_dabr_match = xmon_dabr_match; | |
2567 | __debugger_fault_handler = xmon_fault_handler; | |
2568 | } else { | |
2569 | __debugger = NULL; | |
2570 | __debugger_ipi = NULL; | |
2571 | __debugger_bpt = NULL; | |
2572 | __debugger_sstep = NULL; | |
2573 | __debugger_iabr_match = NULL; | |
2574 | __debugger_dabr_match = NULL; | |
2575 | __debugger_fault_handler = NULL; | |
2576 | } | |
fca5dcd4 | 2577 | xmon_map_scc(); |
1da177e4 | 2578 | } |
fca5dcd4 PM |
2579 | |
2580 | #ifdef CONFIG_MAGIC_SYSRQ | |
7d12e780 | 2581 | static void sysrq_handle_xmon(int key, struct tty_struct *tty) |
fca5dcd4 PM |
2582 | { |
2583 | /* ensure xmon is enabled */ | |
2584 | xmon_init(1); | |
7d12e780 | 2585 | debugger(get_irq_regs()); |
fca5dcd4 PM |
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 | } |