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8956 Implement KPTI
Reviewed by: Jerry Jelinek <jerry.jelinek@joyent.com>
Reviewed by: Robert Mustacchi <rm@joyent.com>
9210 remove KMDB branch debugging support
9211 ::crregs could do with cr2/cr3 support
9209 ::ttrace should be able to filter by thread
Reviewed by: Patrick Mooney <patrick.mooney@joyent.com>
Reviewed by: Yuri Pankov <yuripv@yuripv.net>
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--- old/usr/src/cmd/mdb/i86pc/modules/unix/unix.c
+++ new/usr/src/cmd/mdb/i86pc/modules/unix/unix.c
1 1 /*
2 2 * CDDL HEADER START
3 3 *
4 4 * The contents of this file are subject to the terms of the
5 5 * Common Development and Distribution License (the "License").
6 6 * You may not use this file except in compliance with the License.
7 7 *
8 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 9 * or http://www.opensolaris.org/os/licensing.
10 10 * See the License for the specific language governing permissions
11 11 * and limitations under the License.
12 12 *
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13 13 * When distributing Covered Code, include this CDDL HEADER in each
14 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 15 * If applicable, add the following below this CDDL HEADER, with the
16 16 * fields enclosed by brackets "[]" replaced with your own identifying
17 17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 18 *
19 19 * CDDL HEADER END
20 20 */
21 21 /*
22 22 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
23 - * Copyright 2015 Joyent, Inc.
23 + * Copyright 2018 Joyent, Inc.
24 24 */
25 25
26 26 #include <mdb/mdb_modapi.h>
27 27 #include <mdb/mdb_ctf.h>
28 28 #include <sys/cpuvar.h>
29 29 #include <sys/systm.h>
30 30 #include <sys/traptrace.h>
31 31 #include <sys/x_call.h>
32 32 #include <sys/xc_levels.h>
33 33 #include <sys/avintr.h>
34 34 #include <sys/systm.h>
35 35 #include <sys/trap.h>
36 36 #include <sys/mutex.h>
37 37 #include <sys/mutex_impl.h>
38 38 #include "i86mmu.h"
39 39 #include "unix_sup.h"
40 40 #include <sys/apix.h>
41 41 #include <sys/x86_archext.h>
42 42 #include <sys/bitmap.h>
43 43 #include <sys/controlregs.h>
44 44
45 45 #define TT_HDLR_WIDTH 17
46 46
47 47
48 48 /* apix only */
49 49 static apix_impl_t *d_apixs[NCPU];
50 50 static int use_apix = 0;
51 51
52 52 static int
53 53 ttrace_ttr_size_check(void)
54 54 {
55 55 mdb_ctf_id_t ttrtid;
56 56 ssize_t ttr_size;
57 57
58 58 if (mdb_ctf_lookup_by_name("trap_trace_rec_t", &ttrtid) != 0 ||
59 59 mdb_ctf_type_resolve(ttrtid, &ttrtid) != 0) {
60 60 mdb_warn("failed to determine size of trap_trace_rec_t; "
61 61 "non-TRAPTRACE kernel?\n");
62 62 return (0);
63 63 }
64 64
65 65 if ((ttr_size = mdb_ctf_type_size(ttrtid)) !=
66 66 sizeof (trap_trace_rec_t)) {
67 67 /*
68 68 * On Intel machines, this will happen when TTR_STACK_DEPTH
69 69 * is changed. This code could be smarter, and could
70 70 * dynamically adapt to different depths, but not until a
71 71 * need for such adaptation is demonstrated.
72 72 */
73 73 mdb_warn("size of trap_trace_rec_t (%d bytes) doesn't "
74 74 "match expected %d\n", ttr_size, sizeof (trap_trace_rec_t));
75 75 return (0);
76 76 }
77 77
78 78 return (1);
79 79 }
80 80
81 81 int
82 82 ttrace_walk_init(mdb_walk_state_t *wsp)
83 83 {
84 84 trap_trace_ctl_t *ttcp;
85 85 size_t ttc_size = sizeof (trap_trace_ctl_t) * NCPU;
86 86 int i;
87 87
88 88 if (!ttrace_ttr_size_check())
89 89 return (WALK_ERR);
90 90
91 91 ttcp = mdb_zalloc(ttc_size, UM_SLEEP);
92 92
93 93 if (wsp->walk_addr != NULL) {
94 94 mdb_warn("ttrace only supports global walks\n");
95 95 return (WALK_ERR);
96 96 }
97 97
98 98 if (mdb_readsym(ttcp, ttc_size, "trap_trace_ctl") == -1) {
99 99 mdb_warn("symbol 'trap_trace_ctl' not found; "
100 100 "non-TRAPTRACE kernel?\n");
101 101 mdb_free(ttcp, ttc_size);
102 102 return (WALK_ERR);
103 103 }
104 104
105 105 /*
106 106 * We'll poach the ttc_current pointer (which isn't used for
107 107 * anything) to store a pointer to our current TRAPTRACE record.
108 108 * This allows us to only keep the array of trap_trace_ctl structures
109 109 * as our walker state (ttc_current may be the only kernel data
110 110 * structure member added exclusively to make writing the mdb walker
111 111 * a little easier).
112 112 */
113 113 for (i = 0; i < NCPU; i++) {
114 114 trap_trace_ctl_t *ttc = &ttcp[i];
115 115
116 116 if (ttc->ttc_first == NULL)
117 117 continue;
118 118
119 119 /*
120 120 * Assign ttc_current to be the last completed record.
121 121 * Note that the error checking (i.e. in the ttc_next ==
122 122 * ttc_first case) is performed in the step function.
123 123 */
124 124 ttc->ttc_current = ttc->ttc_next - sizeof (trap_trace_rec_t);
125 125 }
126 126
127 127 wsp->walk_data = ttcp;
128 128 return (WALK_NEXT);
129 129 }
130 130
131 131 int
132 132 ttrace_walk_step(mdb_walk_state_t *wsp)
133 133 {
134 134 trap_trace_ctl_t *ttcp = wsp->walk_data, *ttc, *latest_ttc;
135 135 trap_trace_rec_t rec;
136 136 int rval, i, recsize = sizeof (trap_trace_rec_t);
137 137 hrtime_t latest = 0;
138 138
139 139 /*
140 140 * Loop through the CPUs, looking for the latest trap trace record
141 141 * (we want to walk through the trap trace records in reverse
142 142 * chronological order).
143 143 */
144 144 for (i = 0; i < NCPU; i++) {
145 145 ttc = &ttcp[i];
146 146
147 147 if (ttc->ttc_current == NULL)
148 148 continue;
149 149
150 150 if (ttc->ttc_current < ttc->ttc_first)
151 151 ttc->ttc_current = ttc->ttc_limit - recsize;
152 152
153 153 if (mdb_vread(&rec, sizeof (rec), ttc->ttc_current) == -1) {
154 154 mdb_warn("couldn't read rec at %p", ttc->ttc_current);
155 155 return (WALK_ERR);
156 156 }
157 157
158 158 if (rec.ttr_stamp > latest) {
159 159 latest = rec.ttr_stamp;
160 160 latest_ttc = ttc;
161 161 }
162 162 }
163 163
164 164 if (latest == 0)
165 165 return (WALK_DONE);
166 166
167 167 ttc = latest_ttc;
168 168
169 169 if (mdb_vread(&rec, sizeof (rec), ttc->ttc_current) == -1) {
170 170 mdb_warn("couldn't read rec at %p", ttc->ttc_current);
171 171 return (WALK_ERR);
172 172 }
173 173
174 174 rval = wsp->walk_callback(ttc->ttc_current, &rec, wsp->walk_cbdata);
175 175
176 176 if (ttc->ttc_current == ttc->ttc_next)
177 177 ttc->ttc_current = NULL;
178 178 else
179 179 ttc->ttc_current -= sizeof (trap_trace_rec_t);
180 180
181 181 return (rval);
182 182 }
183 183
184 184 void
185 185 ttrace_walk_fini(mdb_walk_state_t *wsp)
186 186 {
187 187 mdb_free(wsp->walk_data, sizeof (trap_trace_ctl_t) * NCPU);
188 188 }
189 189
190 190 static int
191 191 ttrace_syscall(trap_trace_rec_t *rec)
192 192 {
193 193 GElf_Sym sym;
194 194 int sysnum = rec->ttr_sysnum;
195 195 uintptr_t addr;
196 196 struct sysent sys;
197 197
198 198 mdb_printf("%-3x", sysnum);
199 199
200 200 if (rec->ttr_sysnum > NSYSCALL) {
201 201 mdb_printf(" %-*d", TT_HDLR_WIDTH, rec->ttr_sysnum);
202 202 return (0);
203 203 }
204 204
205 205 if (mdb_lookup_by_name("sysent", &sym) == -1) {
206 206 mdb_warn("\ncouldn't find 'sysent'");
207 207 return (-1);
208 208 }
209 209
210 210 addr = (uintptr_t)sym.st_value + sysnum * sizeof (struct sysent);
211 211
212 212 if (addr >= (uintptr_t)sym.st_value + sym.st_size) {
213 213 mdb_warn("\nsysnum %d out-of-range\n", sysnum);
214 214 return (-1);
215 215 }
216 216
217 217 if (mdb_vread(&sys, sizeof (sys), addr) == -1) {
218 218 mdb_warn("\nfailed to read sysent at %p", addr);
219 219 return (-1);
220 220 }
221 221
222 222 mdb_printf(" %-*a", TT_HDLR_WIDTH, sys.sy_callc);
223 223
224 224 return (0);
225 225 }
226 226
227 227 static int
228 228 ttrace_interrupt(trap_trace_rec_t *rec)
229 229 {
230 230 GElf_Sym sym;
231 231 uintptr_t addr;
232 232 struct av_head hd;
233 233 struct autovec av;
234 234
235 235 switch (rec->ttr_regs.r_trapno) {
236 236 case T_SOFTINT:
237 237 mdb_printf("%-3s %-*s", "-", TT_HDLR_WIDTH, "(fakesoftint)");
238 238 return (0);
239 239 default:
240 240 break;
241 241 }
242 242
243 243 mdb_printf("%-3x ", rec->ttr_vector);
244 244
245 245 if (mdb_lookup_by_name("autovect", &sym) == -1) {
246 246 mdb_warn("\ncouldn't find 'autovect'");
247 247 return (-1);
248 248 }
249 249
250 250 addr = (uintptr_t)sym.st_value +
251 251 rec->ttr_vector * sizeof (struct av_head);
252 252
253 253 if (addr >= (uintptr_t)sym.st_value + sym.st_size) {
254 254 mdb_warn("\nav_head for vec %x is corrupt\n", rec->ttr_vector);
255 255 return (-1);
256 256 }
257 257
258 258 if (mdb_vread(&hd, sizeof (hd), addr) == -1) {
259 259 mdb_warn("\ncouldn't read av_head for vec %x", rec->ttr_vector);
260 260 return (-1);
261 261 }
262 262
263 263 if (hd.avh_link == NULL) {
264 264 if (rec->ttr_ipl == XC_CPUPOKE_PIL)
265 265 mdb_printf("%-*s", TT_HDLR_WIDTH, "(cpupoke)");
266 266 else
267 267 mdb_printf("%-*s", TT_HDLR_WIDTH, "(spurious)");
268 268 } else {
269 269 if (mdb_vread(&av, sizeof (av), (uintptr_t)hd.avh_link) == -1) {
270 270 mdb_warn("couldn't read autovec at %p",
271 271 (uintptr_t)hd.avh_link);
272 272 }
273 273
274 274 mdb_printf("%-*a", TT_HDLR_WIDTH, av.av_vector);
275 275 }
276 276
277 277 return (0);
278 278 }
279 279
280 280 static int
281 281 ttrace_apix_interrupt(trap_trace_rec_t *rec)
282 282 {
283 283 struct autovec av;
284 284 apix_impl_t apix;
285 285 apix_vector_t apix_vector;
286 286
287 287 switch (rec->ttr_regs.r_trapno) {
288 288 case T_SOFTINT:
289 289 mdb_printf("%-3s %-*s", "-", TT_HDLR_WIDTH, "(fakesoftint)");
290 290 return (0);
291 291 default:
292 292 break;
293 293 }
294 294
295 295 mdb_printf("%-3x ", rec->ttr_vector);
296 296
297 297 /* Read the per CPU apix entry */
298 298 if (mdb_vread(&apix, sizeof (apix_impl_t),
299 299 (uintptr_t)d_apixs[rec->ttr_cpuid]) == -1) {
300 300 mdb_warn("\ncouldn't read apix[%d]", rec->ttr_cpuid);
301 301 return (-1);
302 302 }
303 303 if (mdb_vread(&apix_vector, sizeof (apix_vector_t),
304 304 (uintptr_t)apix.x_vectbl[rec->ttr_vector]) == -1) {
305 305 mdb_warn("\ncouldn't read apix_vector_t[%d]", rec->ttr_vector);
306 306 return (-1);
307 307 }
308 308 if (apix_vector.v_share == 0) {
309 309 if (rec->ttr_ipl == XC_CPUPOKE_PIL)
310 310 mdb_printf("%-*s", TT_HDLR_WIDTH, "(cpupoke)");
311 311 else
312 312 mdb_printf("%-*s", TT_HDLR_WIDTH, "(spurious)");
313 313 } else {
314 314 if (mdb_vread(&av, sizeof (struct autovec),
315 315 (uintptr_t)(apix_vector.v_autovect)) == -1) {
316 316 mdb_warn("couldn't read autovec at %p",
317 317 (uintptr_t)apix_vector.v_autovect);
318 318 }
319 319
320 320 mdb_printf("%-*a", TT_HDLR_WIDTH, av.av_vector);
321 321 }
322 322
323 323 return (0);
324 324 }
325 325
326 326
327 327 static struct {
328 328 int tt_trapno;
329 329 char *tt_name;
330 330 } ttrace_traps[] = {
331 331 { T_ZERODIV, "divide-error" },
332 332 { T_SGLSTP, "debug-exception" },
333 333 { T_NMIFLT, "nmi-interrupt" },
334 334 { T_BPTFLT, "breakpoint" },
335 335 { T_OVFLW, "into-overflow" },
336 336 { T_BOUNDFLT, "bound-exceeded" },
337 337 { T_ILLINST, "invalid-opcode" },
338 338 { T_NOEXTFLT, "device-not-avail" },
339 339 { T_DBLFLT, "double-fault" },
340 340 { T_EXTOVRFLT, "segment-overrun" },
341 341 { T_TSSFLT, "invalid-tss" },
342 342 { T_SEGFLT, "segment-not-pres" },
343 343 { T_STKFLT, "stack-fault" },
344 344 { T_GPFLT, "general-protectn" },
345 345 { T_PGFLT, "page-fault" },
346 346 { T_EXTERRFLT, "error-fault" },
347 347 { T_ALIGNMENT, "alignment-check" },
348 348 { T_MCE, "machine-check" },
349 349 { T_SIMDFPE, "sse-exception" },
350 350
351 351 { T_DBGENTR, "debug-enter" },
352 352 { T_FASTTRAP, "fasttrap-0xd2" },
353 353 { T_SYSCALLINT, "syscall-0x91" },
354 354 { T_DTRACE_RET, "dtrace-ret" },
355 355 { T_SOFTINT, "softint" },
356 356 { T_INTERRUPT, "interrupt" },
357 357 { T_FAULT, "fault" },
358 358 { T_AST, "ast" },
359 359 { T_SYSCALL, "syscall" },
360 360
361 361 { 0, NULL }
362 362 };
363 363
364 364 static int
365 365 ttrace_trap(trap_trace_rec_t *rec)
366 366 {
367 367 int i;
368 368
369 369 if (rec->ttr_regs.r_trapno == T_AST)
370 370 mdb_printf("%-3s ", "-");
371 371 else
372 372 mdb_printf("%-3x ", rec->ttr_regs.r_trapno);
373 373
374 374 for (i = 0; ttrace_traps[i].tt_name != NULL; i++) {
375 375 if (rec->ttr_regs.r_trapno == ttrace_traps[i].tt_trapno)
376 376 break;
377 377 }
378 378
379 379 if (ttrace_traps[i].tt_name == NULL)
380 380 mdb_printf("%-*s", TT_HDLR_WIDTH, "(unknown)");
381 381 else
382 382 mdb_printf("%-*s", TT_HDLR_WIDTH, ttrace_traps[i].tt_name);
383 383
384 384 return (0);
385 385 }
386 386
387 387 static void
388 388 ttrace_intr_detail(trap_trace_rec_t *rec)
389 389 {
390 390 mdb_printf("\tirq %x ipl %d oldpri %d basepri %d\n", rec->ttr_vector,
391 391 rec->ttr_ipl, rec->ttr_pri, rec->ttr_spl);
392 392 }
393 393
394 394 static struct {
395 395 uchar_t t_marker;
396 396 char *t_name;
397 397 int (*t_hdlr)(trap_trace_rec_t *);
398 398 } ttrace_hdlr[] = {
399 399 { TT_SYSCALL, "sysc", ttrace_syscall },
400 400 { TT_SYSENTER, "syse", ttrace_syscall },
401 401 { TT_SYSC, "asys", ttrace_syscall },
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402 402 { TT_SYSC64, "sc64", ttrace_syscall },
403 403 { TT_INTERRUPT, "intr", ttrace_interrupt },
404 404 { TT_TRAP, "trap", ttrace_trap },
405 405 { TT_EVENT, "evnt", ttrace_trap },
406 406 { 0, NULL, NULL }
407 407 };
408 408
409 409 typedef struct ttrace_dcmd {
410 410 processorid_t ttd_cpu;
411 411 uint_t ttd_extended;
412 + uintptr_t ttd_kthread;
412 413 trap_trace_ctl_t ttd_ttc[NCPU];
413 414 } ttrace_dcmd_t;
414 415
415 416 #if defined(__amd64)
416 417
417 418 #define DUMP(reg) #reg, regs->r_##reg
418 419 #define THREEREGS " %3s: %16lx %3s: %16lx %3s: %16lx\n"
419 420
420 421 static void
421 422 ttrace_dumpregs(trap_trace_rec_t *rec)
422 423 {
423 424 struct regs *regs = &rec->ttr_regs;
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424 425
425 426 mdb_printf(THREEREGS, DUMP(rdi), DUMP(rsi), DUMP(rdx));
426 427 mdb_printf(THREEREGS, DUMP(rcx), DUMP(r8), DUMP(r9));
427 428 mdb_printf(THREEREGS, DUMP(rax), DUMP(rbx), DUMP(rbp));
428 429 mdb_printf(THREEREGS, DUMP(r10), DUMP(r11), DUMP(r12));
429 430 mdb_printf(THREEREGS, DUMP(r13), DUMP(r14), DUMP(r15));
430 431 mdb_printf(THREEREGS, DUMP(ds), DUMP(es), DUMP(fs));
431 432 mdb_printf(THREEREGS, DUMP(gs), "trp", regs->r_trapno, DUMP(err));
432 433 mdb_printf(THREEREGS, DUMP(rip), DUMP(cs), DUMP(rfl));
433 434 mdb_printf(THREEREGS, DUMP(rsp), DUMP(ss), "cr2", rec->ttr_cr2);
435 + mdb_printf(" %3s: %16lx %3s: %16lx\n",
436 + "fsb", regs->__r_fsbase,
437 + "gsb", regs->__r_gsbase);
434 438 mdb_printf("\n");
435 439 }
436 440
437 441 #else
438 442
439 443 #define DUMP(reg) #reg, regs->r_##reg
440 444 #define FOURREGS " %3s: %08x %3s: %08x %3s: %08x %3s: %08x\n"
441 445
442 446 static void
443 447 ttrace_dumpregs(trap_trace_rec_t *rec)
444 448 {
445 449 struct regs *regs = &rec->ttr_regs;
446 450
447 451 mdb_printf(FOURREGS, DUMP(gs), DUMP(fs), DUMP(es), DUMP(ds));
448 452 mdb_printf(FOURREGS, DUMP(edi), DUMP(esi), DUMP(ebp), DUMP(esp));
449 453 mdb_printf(FOURREGS, DUMP(ebx), DUMP(edx), DUMP(ecx), DUMP(eax));
450 454 mdb_printf(FOURREGS, "trp", regs->r_trapno, DUMP(err),
451 455 DUMP(pc), DUMP(cs));
452 456 mdb_printf(FOURREGS, DUMP(efl), "usp", regs->r_uesp, DUMP(ss),
453 457 "cr2", rec->ttr_cr2);
454 458 mdb_printf("\n");
455 459 }
456 460
457 461 #endif /* __amd64 */
458 462
459 463 int
460 464 ttrace_walk(uintptr_t addr, trap_trace_rec_t *rec, ttrace_dcmd_t *dcmd)
461 465 {
462 466 struct regs *regs = &rec->ttr_regs;
463 467 processorid_t cpu = -1, i;
464 468
465 469 for (i = 0; i < NCPU; i++) {
466 470 if (addr >= dcmd->ttd_ttc[i].ttc_first &&
467 471 addr < dcmd->ttd_ttc[i].ttc_limit) {
468 472 cpu = i;
469 473 break;
470 474 }
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471 475 }
472 476
473 477 if (cpu == -1) {
474 478 mdb_warn("couldn't find %p in any trap trace ctl\n", addr);
475 479 return (WALK_ERR);
476 480 }
477 481
478 482 if (dcmd->ttd_cpu != -1 && cpu != dcmd->ttd_cpu)
479 483 return (WALK_NEXT);
480 484
485 + if (dcmd->ttd_kthread != 0 &&
486 + dcmd->ttd_kthread != rec->ttr_curthread)
487 + return (WALK_NEXT);
488 +
481 489 mdb_printf("%3d %15llx ", cpu, rec->ttr_stamp);
482 490
483 491 for (i = 0; ttrace_hdlr[i].t_hdlr != NULL; i++) {
484 492 if (rec->ttr_marker != ttrace_hdlr[i].t_marker)
485 493 continue;
486 494 mdb_printf("%4s ", ttrace_hdlr[i].t_name);
487 495 if (ttrace_hdlr[i].t_hdlr(rec) == -1)
488 496 return (WALK_ERR);
489 497 }
490 498
491 499 mdb_printf(" %a\n", regs->r_pc);
492 500
493 501 if (dcmd->ttd_extended == FALSE)
494 502 return (WALK_NEXT);
495 503
496 504 if (rec->ttr_marker == TT_INTERRUPT)
497 505 ttrace_intr_detail(rec);
498 506 else
499 507 ttrace_dumpregs(rec);
500 508
501 509 if (rec->ttr_sdepth > 0) {
502 510 for (i = 0; i < rec->ttr_sdepth; i++) {
503 511 if (i >= TTR_STACK_DEPTH) {
504 512 mdb_printf("%17s*** invalid ttr_sdepth (is %d, "
505 513 "should be <= %d)\n", " ", rec->ttr_sdepth,
506 514 TTR_STACK_DEPTH);
507 515 break;
508 516 }
509 517
510 518 mdb_printf("%17s %a()\n", " ", rec->ttr_stack[i]);
511 519 }
512 520 mdb_printf("\n");
513 521 }
514 522
515 523 return (WALK_NEXT);
516 524 }
517 525
518 526 int
519 527 ttrace(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
520 528 {
521 529 ttrace_dcmd_t dcmd;
522 530 trap_trace_ctl_t *ttc = dcmd.ttd_ttc;
523 531 trap_trace_rec_t rec;
524 532 size_t ttc_size = sizeof (trap_trace_ctl_t) * NCPU;
525 533
526 534 if (!ttrace_ttr_size_check())
527 535 return (WALK_ERR);
528 536
529 537 bzero(&dcmd, sizeof (dcmd));
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530 538 dcmd.ttd_cpu = -1;
531 539 dcmd.ttd_extended = FALSE;
532 540
533 541 if (mdb_readsym(ttc, ttc_size, "trap_trace_ctl") == -1) {
534 542 mdb_warn("symbol 'trap_trace_ctl' not found; "
535 543 "non-TRAPTRACE kernel?\n");
536 544 return (DCMD_ERR);
537 545 }
538 546
539 547 if (mdb_getopts(argc, argv,
540 - 'x', MDB_OPT_SETBITS, TRUE, &dcmd.ttd_extended, NULL) != argc)
548 + 'x', MDB_OPT_SETBITS, TRUE, &dcmd.ttd_extended,
549 + 't', MDB_OPT_UINTPTR, &dcmd.ttd_kthread, NULL) != argc)
541 550 return (DCMD_USAGE);
542 551
543 552 if (DCMD_HDRSPEC(flags)) {
544 553 mdb_printf("%3s %15s %4s %2s %-*s%s\n", "CPU",
545 554 "TIMESTAMP", "TYPE", "Vec", TT_HDLR_WIDTH, "HANDLER",
546 555 " EIP");
547 556 }
548 557
549 558 if (flags & DCMD_ADDRSPEC) {
550 559 if (addr >= NCPU) {
551 560 if (mdb_vread(&rec, sizeof (rec), addr) == -1) {
552 561 mdb_warn("couldn't read trap trace record "
553 562 "at %p", addr);
554 563 return (DCMD_ERR);
555 564 }
556 565
557 566 if (ttrace_walk(addr, &rec, &dcmd) == WALK_ERR)
558 567 return (DCMD_ERR);
559 568
560 569 return (DCMD_OK);
561 570 }
562 571 dcmd.ttd_cpu = addr;
563 572 }
564 573
565 574 if (mdb_readvar(&use_apix, "apix_enable") == -1) {
566 575 mdb_warn("failed to read apix_enable");
567 576 use_apix = 0;
568 577 }
569 578
570 579 if (use_apix) {
571 580 if (mdb_readvar(&d_apixs, "apixs") == -1) {
572 581 mdb_warn("\nfailed to read apixs.");
573 582 return (DCMD_ERR);
574 583 }
575 584 /* change to apix ttrace interrupt handler */
576 585 ttrace_hdlr[4].t_hdlr = ttrace_apix_interrupt;
577 586 }
578 587
579 588 if (mdb_walk("ttrace", (mdb_walk_cb_t)ttrace_walk, &dcmd) == -1) {
580 589 mdb_warn("couldn't walk 'ttrace'");
581 590 return (DCMD_ERR);
582 591 }
583 592
584 593 return (DCMD_OK);
585 594 }
586 595
587 596 /*ARGSUSED*/
588 597 int
589 598 mutex_owner_init(mdb_walk_state_t *wsp)
590 599 {
591 600 return (WALK_NEXT);
592 601 }
593 602
594 603 int
595 604 mutex_owner_step(mdb_walk_state_t *wsp)
596 605 {
597 606 uintptr_t addr = wsp->walk_addr;
598 607 mutex_impl_t mtx;
599 608 uintptr_t owner;
600 609 kthread_t thr;
601 610
602 611 if (mdb_vread(&mtx, sizeof (mtx), addr) == -1)
603 612 return (WALK_ERR);
604 613
605 614 if (!MUTEX_TYPE_ADAPTIVE(&mtx))
606 615 return (WALK_DONE);
607 616
608 617 if ((owner = (uintptr_t)MUTEX_OWNER(&mtx)) == NULL)
609 618 return (WALK_DONE);
610 619
611 620 if (mdb_vread(&thr, sizeof (thr), owner) != -1)
612 621 (void) wsp->walk_callback(owner, &thr, wsp->walk_cbdata);
613 622
614 623 return (WALK_DONE);
615 624 }
616 625
617 626 static void
618 627 gate_desc_dump(gate_desc_t *gate, const char *label, int header)
619 628 {
620 629 const char *lastnm;
621 630 uint_t lastval;
622 631 char type[4];
623 632
624 633 switch (gate->sgd_type) {
625 634 case SDT_SYSIGT:
626 635 strcpy(type, "int");
627 636 break;
628 637 case SDT_SYSTGT:
629 638 strcpy(type, "trp");
630 639 break;
631 640 case SDT_SYSTASKGT:
632 641 strcpy(type, "tsk");
633 642 break;
634 643 default:
635 644 (void) mdb_snprintf(type, sizeof (type), "%3x", gate->sgd_type);
636 645 }
637 646
638 647 #if defined(__amd64)
639 648 lastnm = "IST";
640 649 lastval = gate->sgd_ist;
641 650 #else
642 651 lastnm = "STK";
643 652 lastval = gate->sgd_stkcpy;
644 653 #endif
645 654
646 655 if (header) {
647 656 mdb_printf("%*s%<u>%-30s%</u> %<u>%-4s%</u> %<u>%3s%</u> "
648 657 "%<u>%1s%</u> %<u>%3s%</u> %<u>%3s%</u>\n", strlen(label),
649 658 "", "HANDLER", "SEL", "DPL", "P", "TYP", lastnm);
650 659 }
651 660
652 661 mdb_printf("%s", label);
653 662
654 663 if (gate->sgd_type == SDT_SYSTASKGT)
655 664 mdb_printf("%-30s ", "-");
656 665 else
657 666 mdb_printf("%-30a ", GATESEG_GETOFFSET(gate));
658 667
659 668 mdb_printf("%4x %d %c %3s %2x\n", gate->sgd_selector,
660 669 gate->sgd_dpl, (gate->sgd_p ? '+' : ' '), type, lastval);
661 670 }
662 671
663 672 /*ARGSUSED*/
664 673 static int
665 674 gate_desc(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
666 675 {
667 676 gate_desc_t gate;
668 677
669 678 if (argc != 0 || !(flags & DCMD_ADDRSPEC))
670 679 return (DCMD_USAGE);
671 680
672 681 if (mdb_vread(&gate, sizeof (gate_desc_t), addr) !=
673 682 sizeof (gate_desc_t)) {
674 683 mdb_warn("failed to read gate descriptor at %p\n", addr);
675 684 return (DCMD_ERR);
676 685 }
677 686
678 687 gate_desc_dump(&gate, "", DCMD_HDRSPEC(flags));
679 688
680 689 return (DCMD_OK);
681 690 }
682 691
683 692 /*ARGSUSED*/
684 693 static int
685 694 idt(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
686 695 {
687 696 int i;
688 697
689 698 if (!(flags & DCMD_ADDRSPEC)) {
690 699 GElf_Sym idt0_va;
691 700 gate_desc_t *idt0;
692 701
693 702 if (mdb_lookup_by_name("idt0", &idt0_va) < 0) {
694 703 mdb_warn("failed to find VA of idt0");
695 704 return (DCMD_ERR);
696 705 }
697 706
698 707 addr = idt0_va.st_value;
699 708 if (mdb_vread(&idt0, sizeof (idt0), addr) != sizeof (idt0)) {
700 709 mdb_warn("failed to read idt0 at %p\n", addr);
701 710 return (DCMD_ERR);
702 711 }
703 712
704 713 addr = (uintptr_t)idt0;
705 714 }
706 715
707 716 for (i = 0; i < NIDT; i++, addr += sizeof (gate_desc_t)) {
708 717 gate_desc_t gate;
709 718 char label[6];
710 719
711 720 if (mdb_vread(&gate, sizeof (gate_desc_t), addr) !=
712 721 sizeof (gate_desc_t)) {
713 722 mdb_warn("failed to read gate descriptor at %p\n",
714 723 addr);
715 724 return (DCMD_ERR);
716 725 }
717 726
718 727 (void) mdb_snprintf(label, sizeof (label), "%3d: ", i);
719 728 gate_desc_dump(&gate, label, i == 0);
720 729 }
721 730
722 731 return (DCMD_OK);
723 732 }
724 733
725 734 static void
726 735 htables_help(void)
727 736 {
728 737 mdb_printf(
729 738 "Given a (hat_t *), generates the list of all (htable_t *)s\n"
730 739 "that correspond to that address space\n");
731 740 }
732 741
733 742 static void
734 743 report_maps_help(void)
735 744 {
736 745 mdb_printf(
737 746 "Given a PFN, report HAT structures that map the page, or use\n"
738 747 "the page as a pagetable.\n"
739 748 "\n"
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740 749 "-m Interpret the PFN as an MFN (machine frame number)\n");
741 750 }
742 751
743 752 static void
744 753 ptable_help(void)
745 754 {
746 755 mdb_printf(
747 756 "Given a PFN holding a page table, print its contents, and\n"
748 757 "the address of the corresponding htable structure.\n"
749 758 "\n"
750 - "-m Interpret the PFN as an MFN (machine frame number)\n");
759 + "-m Interpret the PFN as an MFN (machine frame number)\n"
760 + "-l force page table level (3 is top)\n");
751 761 }
752 762
763 +static void
764 +ptmap_help(void)
765 +{
766 + mdb_printf(
767 + "Report all mappings represented by the page table hierarchy\n"
768 + "rooted at the given cr3 value / physical address.\n"
769 + "\n"
770 + "-w run ::whatis on mapping start addresses\n");
771 +}
772 +
753 773 /*
754 774 * NSEC_SHIFT is replicated here (it is not defined in a header file),
755 775 * but for amusement, the reader is directed to the comment that explains
756 776 * the rationale for this particular value on x86. Spoiler: the value is
757 777 * selected to accommodate 60 MHz Pentiums! (And a confession: if the voice
758 778 * in that comment sounds too familiar, it's because your author also wrote
759 779 * that code -- some fifteen years prior to this writing in 2011...)
760 780 */
761 781 #define NSEC_SHIFT 5
762 782
763 783 /*ARGSUSED*/
764 784 static int
765 785 scalehrtime_cmd(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
766 786 {
767 787 uint32_t nsec_scale;
768 788 hrtime_t tsc = addr, hrt;
769 789 unsigned int *tscp = (unsigned int *)&tsc;
770 790 uintptr_t scalehrtimef;
771 791 uint64_t scale;
772 792 GElf_Sym sym;
773 793
774 794 if (!(flags & DCMD_ADDRSPEC)) {
775 795 if (argc != 1)
776 796 return (DCMD_USAGE);
777 797
778 798 switch (argv[0].a_type) {
779 799 case MDB_TYPE_STRING:
780 800 tsc = mdb_strtoull(argv[0].a_un.a_str);
781 801 break;
782 802 case MDB_TYPE_IMMEDIATE:
783 803 tsc = argv[0].a_un.a_val;
784 804 break;
785 805 default:
786 806 return (DCMD_USAGE);
787 807 }
788 808 }
789 809
790 810 if (mdb_readsym(&scalehrtimef,
791 811 sizeof (scalehrtimef), "scalehrtimef") == -1) {
792 812 mdb_warn("couldn't read 'scalehrtimef'");
793 813 return (DCMD_ERR);
794 814 }
795 815
796 816 if (mdb_lookup_by_name("tsc_scalehrtime", &sym) == -1) {
797 817 mdb_warn("couldn't find 'tsc_scalehrtime'");
798 818 return (DCMD_ERR);
799 819 }
800 820
801 821 if (sym.st_value != scalehrtimef) {
802 822 mdb_warn("::scalehrtime requires that scalehrtimef "
803 823 "be set to tsc_scalehrtime\n");
804 824 return (DCMD_ERR);
805 825 }
806 826
807 827 if (mdb_readsym(&nsec_scale, sizeof (nsec_scale), "nsec_scale") == -1) {
808 828 mdb_warn("couldn't read 'nsec_scale'");
809 829 return (DCMD_ERR);
810 830 }
811 831
812 832 scale = (uint64_t)nsec_scale;
813 833
814 834 hrt = ((uint64_t)tscp[1] * scale) << NSEC_SHIFT;
815 835 hrt += ((uint64_t)tscp[0] * scale) >> (32 - NSEC_SHIFT);
816 836
817 837 mdb_printf("0x%llx\n", hrt);
818 838
819 839 return (DCMD_OK);
820 840 }
821 841
822 842 /*
823 843 * The x86 feature set is implemented as a bitmap array. That bitmap array is
824 844 * stored across a number of uchars based on the BT_SIZEOFMAP(NUM_X86_FEATURES)
825 845 * macro. We have the names for each of these features in unix's text segment
826 846 * so we do not have to duplicate them and instead just look them up.
827 847 */
828 848 /*ARGSUSED*/
829 849 static int
830 850 x86_featureset_cmd(uintptr_t addr, uint_t flags, int argc,
831 851 const mdb_arg_t *argv)
832 852 {
833 853 void *fset;
834 854 GElf_Sym sym;
835 855 uintptr_t nptr;
836 856 char name[128];
837 857 int ii;
838 858
839 859 size_t sz = sizeof (uchar_t) * BT_SIZEOFMAP(NUM_X86_FEATURES);
840 860
841 861 if (argc != 0)
842 862 return (DCMD_USAGE);
843 863
844 864 if (mdb_lookup_by_name("x86_feature_names", &sym) == -1) {
845 865 mdb_warn("couldn't find x86_feature_names");
846 866 return (DCMD_ERR);
847 867 }
848 868
849 869 fset = mdb_zalloc(sz, UM_NOSLEEP);
850 870 if (fset == NULL) {
851 871 mdb_warn("failed to allocate memory for x86_featureset");
852 872 return (DCMD_ERR);
853 873 }
854 874
855 875 if (mdb_readvar(fset, "x86_featureset") != sz) {
856 876 mdb_warn("failed to read x86_featureset");
857 877 mdb_free(fset, sz);
858 878 return (DCMD_ERR);
859 879 }
860 880
861 881 for (ii = 0; ii < NUM_X86_FEATURES; ii++) {
862 882 if (!BT_TEST((ulong_t *)fset, ii))
863 883 continue;
864 884
865 885 if (mdb_vread(&nptr, sizeof (char *), sym.st_value +
866 886 sizeof (void *) * ii) != sizeof (char *)) {
867 887 mdb_warn("failed to read feature array %d", ii);
868 888 mdb_free(fset, sz);
869 889 return (DCMD_ERR);
870 890 }
871 891
872 892 if (mdb_readstr(name, sizeof (name), nptr) == -1) {
873 893 mdb_warn("failed to read feature %d", ii);
874 894 mdb_free(fset, sz);
875 895 return (DCMD_ERR);
876 896 }
877 897 mdb_printf("%s\n", name);
878 898 }
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879 899
880 900 mdb_free(fset, sz);
881 901 return (DCMD_OK);
882 902 }
883 903
884 904 #ifdef _KMDB
885 905 /* ARGSUSED */
886 906 static int
887 907 crregs_dcmd(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv)
888 908 {
889 - ulong_t cr0, cr4;
909 + ulong_t cr0, cr2, cr3, cr4;
890 910 static const mdb_bitmask_t cr0_flag_bits[] = {
891 911 { "PE", CR0_PE, CR0_PE },
892 912 { "MP", CR0_MP, CR0_MP },
893 913 { "EM", CR0_EM, CR0_EM },
894 914 { "TS", CR0_TS, CR0_TS },
895 915 { "ET", CR0_ET, CR0_ET },
896 916 { "NE", CR0_NE, CR0_NE },
897 917 { "WP", CR0_WP, CR0_WP },
898 918 { "AM", CR0_AM, CR0_AM },
899 919 { "NW", CR0_NW, CR0_NW },
900 920 { "CD", CR0_CD, CR0_CD },
901 921 { "PG", CR0_PG, CR0_PG },
902 922 { NULL, 0, 0 }
903 923 };
904 924
925 + static const mdb_bitmask_t cr3_flag_bits[] = {
926 + { "PCD", CR3_PCD, CR3_PCD },
927 + { "PWT", CR3_PWT, CR3_PWT },
928 + { NULL, 0, 0, }
929 + };
930 +
905 931 static const mdb_bitmask_t cr4_flag_bits[] = {
906 932 { "VME", CR4_VME, CR4_VME },
907 933 { "PVI", CR4_PVI, CR4_PVI },
908 934 { "TSD", CR4_TSD, CR4_TSD },
909 935 { "DE", CR4_DE, CR4_DE },
910 936 { "PSE", CR4_PSE, CR4_PSE },
911 937 { "PAE", CR4_PAE, CR4_PAE },
912 938 { "MCE", CR4_MCE, CR4_MCE },
913 939 { "PGE", CR4_PGE, CR4_PGE },
914 940 { "PCE", CR4_PCE, CR4_PCE },
915 941 { "OSFXSR", CR4_OSFXSR, CR4_OSFXSR },
916 942 { "OSXMMEXCPT", CR4_OSXMMEXCPT, CR4_OSXMMEXCPT },
917 943 { "VMXE", CR4_VMXE, CR4_VMXE },
918 944 { "SMXE", CR4_SMXE, CR4_SMXE },
945 + { "PCIDE", CR4_PCIDE, CR4_PCIDE },
919 946 { "OSXSAVE", CR4_OSXSAVE, CR4_OSXSAVE },
920 947 { "SMEP", CR4_SMEP, CR4_SMEP },
921 948 { "SMAP", CR4_SMAP, CR4_SMAP },
922 949 { NULL, 0, 0 }
923 950 };
924 951
925 952 cr0 = kmdb_unix_getcr0();
953 + cr2 = kmdb_unix_getcr2();
954 + cr3 = kmdb_unix_getcr3();
926 955 cr4 = kmdb_unix_getcr4();
927 - mdb_printf("%%cr0 = 0x%08x <%b>\n", cr0, cr0, cr0_flag_bits);
928 - mdb_printf("%%cr4 = 0x%08x <%b>\n", cr4, cr4, cr4_flag_bits);
956 + mdb_printf("%%cr0 = 0x%lx <%b>\n", cr0, cr0, cr0_flag_bits);
957 + mdb_printf("%%cr2 = 0x%lx <%a>\n", cr2, cr2);
958 +
959 + if ((cr4 & CR4_PCIDE)) {
960 + mdb_printf("%%cr3 = 0x%lx <pfn:0x%lx pcid:%lu>\n", cr3,
961 + cr3 >> MMU_PAGESHIFT, cr3 & MMU_PAGEOFFSET);
962 + } else {
963 + mdb_printf("%%cr3 = 0x%lx <pfn:0x%lx flags:%b>\n", cr3,
964 + cr3 >> MMU_PAGESHIFT, cr3, cr3_flag_bits);
965 + }
966 +
967 + mdb_printf("%%cr4 = 0x%lx <%b>\n", cr4, cr4, cr4_flag_bits);
968 +
929 969 return (DCMD_OK);
930 970 }
931 971 #endif
932 972
933 973 static const mdb_dcmd_t dcmds[] = {
934 974 { "gate_desc", ":", "dump a gate descriptor", gate_desc },
935 975 { "idt", ":[-v]", "dump an IDT", idt },
936 - { "ttrace", "[-x]", "dump trap trace buffers", ttrace },
976 + { "ttrace", "[-x] [-t kthread]", "dump trap trace buffers", ttrace },
937 977 { "vatopfn", ":[-a as]", "translate address to physical page",
938 978 va2pfn_dcmd },
939 979 { "report_maps", ":[-m]",
940 980 "Given PFN, report mappings / page table usage",
941 981 report_maps_dcmd, report_maps_help },
942 982 { "htables", "", "Given hat_t *, lists all its htable_t * values",
943 983 htables_dcmd, htables_help },
944 - { "ptable", ":[-m]", "Given PFN, dump contents of a page table",
984 + { "ptable", ":[-lm]", "Given PFN, dump contents of a page table",
945 985 ptable_dcmd, ptable_help },
946 - { "pte", ":[-p XXXXX] [-l N]", "print human readable page table entry",
986 + { "ptmap", ":", "Given a cr3 value, dump all mappings",
987 + ptmap_dcmd, ptmap_help },
988 + { "pte", ":[-l N]", "print human readable page table entry",
947 989 pte_dcmd },
948 990 { "pfntomfn", ":", "convert physical page to hypervisor machine page",
949 991 pfntomfn_dcmd },
950 992 { "mfntopfn", ":", "convert hypervisor machine page to physical page",
951 993 mfntopfn_dcmd },
952 994 { "memseg_list", ":", "show memseg list", memseg_list },
953 995 { "scalehrtime", ":",
954 996 "scale an unscaled high-res time", scalehrtime_cmd },
955 997 { "x86_featureset", NULL, "dump the x86_featureset vector",
956 998 x86_featureset_cmd },
957 999 #ifdef _KMDB
958 1000 { "crregs", NULL, "dump control registers", crregs_dcmd },
959 1001 #endif
960 1002 { NULL }
961 1003 };
962 1004
963 1005 static const mdb_walker_t walkers[] = {
964 1006 { "ttrace", "walks trap trace buffers in reverse chronological order",
965 1007 ttrace_walk_init, ttrace_walk_step, ttrace_walk_fini },
966 1008 { "mutex_owner", "walks the owner of a mutex",
967 1009 mutex_owner_init, mutex_owner_step },
968 1010 { "memseg", "walk the memseg structures",
969 1011 memseg_walk_init, memseg_walk_step, memseg_walk_fini },
970 1012 { NULL }
971 1013 };
972 1014
973 1015 static const mdb_modinfo_t modinfo = { MDB_API_VERSION, dcmds, walkers };
974 1016
975 1017 const mdb_modinfo_t *
976 1018 _mdb_init(void)
977 1019 {
978 1020 return (&modinfo);
979 1021 }
980 1022
981 1023 void
982 1024 _mdb_fini(void)
983 1025 {
984 1026 free_mmu();
985 1027 }
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