osfmk/kern/debug.c

   1 /*
   2  * Copyright (c) 2000-2013 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * @OSF_COPYRIGHT@
  30  */
  31 /*
  32  * Mach Operating System
  33  * Copyright (c) 1991,1990,1989 Carnegie Mellon University
  34  * All Rights Reserved.
  35  *
  36  * Permission to use, copy, modify and distribute this software and its
  37  * documentation is hereby granted, provided that both the copyright
  38  * notice and this permission notice appear in all copies of the
  39  * software, derivative works or modified versions, and any portions
  40  * thereof, and that both notices appear in supporting documentation.
  41  *
  42  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  43  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  44  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  45  *
  46  * Carnegie Mellon requests users of this software to return to
  47  *
  48  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  49  *  School of Computer Science
  50  *  Carnegie Mellon University
  51  *  Pittsburgh PA 15213-3890
  52  *
  53  * any improvements or extensions that they make and grant Carnegie Mellon
  54  * the rights to redistribute these changes.
  55  */
  56
  57 #include <mach_assert.h>
  58 #include <mach_kdp.h>
  59
  60 #include <kern/cpu_number.h>
  61 #include <kern/kalloc.h>
  62 #include <kern/spl.h>
  63 #include <kern/thread.h>
  64 #include <kern/assert.h>
  65 #include <kern/sched_prim.h>
  66 #include <kern/misc_protos.h>
  67 #include <kern/clock.h>
  68 #include <kern/telemetry.h>
  69 #include <kern/ecc.h>
  70 #include <vm/vm_kern.h>
  71 #include <vm/pmap.h>
  72 #include <stdarg.h>
  73 #if !(MACH_KDP && CONFIG_KDP_INTERACTIVE_DEBUGGING)
  74 #include <kdp/kdp_udp.h>
  75 #endif
  76
  77 #if defined(__i386__) || defined(__x86_64__)
  78 #include <i386/cpu_threads.h>
  79 #include <i386/pmCPU.h>
  80 #endif
  81
  82 #include <IOKit/IOPlatformExpert.h>
  83 #include <machine/pal_routines.h>
  84
  85 #include <sys/kdebug.h>
  86 #include <libkern/OSKextLibPrivate.h>
  87 #include <libkern/OSAtomic.h>
  88 #include <libkern/kernel_mach_header.h>
  89 #include <uuid/uuid.h>
  90
  91 #if (defined(__arm64__) || defined(NAND_PANIC_DEVICE)) && !defined(LEGACY_PANIC_LOGS)
  92 #include <pexpert/pexpert.h> /* For gPanicBase */
  93 #endif
  94
  95 unsigned int    halt_in_debugger = 0;
  96 unsigned int    switch_debugger = 0;
  97 unsigned int    current_debugger = 0;
  98 unsigned int    active_debugger = 0;
  99 unsigned int    debug_mode=0;
 100 unsigned int    disable_debug_output = TRUE;
 101 unsigned int    systemLogDiags = FALSE;
 102 unsigned int    panicDebugging = FALSE;
 103 unsigned int    logPanicDataToScreen = FALSE;
 104 unsigned int    kdebug_serial = FALSE;
 105
 106 int mach_assert = 1;
 107
 108 const char              *panicstr = (char *) 0;
 109 decl_simple_lock_data(,panic_lock)
 110 int                     paniccpu;
 111 volatile int            panicwait;
 112 volatile unsigned int   nestedpanic= 0;
 113 unsigned int            panic_is_inited = 0;
 114 unsigned int            return_on_panic = 0;
 115 unsigned long           panic_caller;
 116
 117 #define DEBUG_BUF_SIZE (3 * PAGE_SIZE)
 118
 119 /* debug_buf is directly linked with iBoot panic region for ARM64 targets */
 120 #if (defined(__arm64__) || defined(NAND_PANIC_DEVICE)) && !defined(LEGACY_PANIC_LOGS)
 121 char *debug_buf_addr = NULL;
 122 char *debug_buf_ptr = NULL;
 123 unsigned int debug_buf_size = 0;
 124 #else
 125 char debug_buf[DEBUG_BUF_SIZE];
 126 __used char *debug_buf_addr = debug_buf;
 127 char *debug_buf_ptr = debug_buf;
 128 unsigned int debug_buf_size = sizeof(debug_buf);
 129 #endif
 130
 131 static char model_name[64];
 132 unsigned char *kernel_uuid;
 133 /* uuid_string_t */ char kernel_uuid_string[37];
 134
 135 static spl_t panic_prologue(const char *str);
 136 static void panic_epilogue(spl_t s);
 137
 138 struct pasc {
 139   unsigned a: 7;
 140   unsigned b: 7;
 141   unsigned c: 7;
 142   unsigned d: 7;
 143   unsigned e: 7;
 144   unsigned f: 7;
 145   unsigned g: 7;
 146   unsigned h: 7;
 147 }  __attribute__((packed));
 148
 149 typedef struct pasc pasc_t;
 150
 151 /* Prevent CPP from breaking the definition below */
 152 #if CONFIG_NO_PANIC_STRINGS
 153 #undef Assert
 154 #endif
 155
 156 void __attribute__((noinline))
 157 Assert(
 158         const char      *file,
 159         int             line,
 160         const char      *expression
 161       )
 162 {
 163         int saved_return_on_panic;
 164
 165         if (!mach_assert) {
 166                 return;
 167         }
 168
 169         saved_return_on_panic = return_on_panic;
 170
 171         /*
 172          * If we don't have a debugger configured, returning from an
 173          * assert is a bad, bad idea; there is no guarantee that we
 174          * didn't simply assert before we were able to restart the
 175          * platform.
 176          */
 177         if (current_debugger != NO_CUR_DB)
 178                 return_on_panic = 1;
 179
 180         panic_plain("%s:%d Assertion failed: %s", file, line, expression);
 181
 182         return_on_panic = saved_return_on_panic;
 183 }
 184
 185 /*
 186  *      Carefully use the panic_lock.  There's always a chance that
 187  *      somehow we'll call panic before getting to initialize the
 188  *      panic_lock -- in this case, we'll assume that the world is
 189  *      in uniprocessor mode and just avoid using the panic lock.
 190  */
 191 #define PANIC_LOCK()                                                    \
 192 MACRO_BEGIN                                                             \
 193         if (panic_is_inited)                                            \
 194                 simple_lock(&panic_lock);                               \
 195 MACRO_END
 196
 197 #define PANIC_UNLOCK()                                                  \
 198 MACRO_BEGIN                                                             \
 199         if (panic_is_inited)                                            \
 200                 simple_unlock(&panic_lock);                             \
 201 MACRO_END
 202
 203 void
 204 panic_init(void)
 205 {
 206         unsigned long uuidlen = 0;
 207         void *uuid;
 208
 209         uuid = getuuidfromheader(&_mh_execute_header, &uuidlen);
 210         if ((uuid != NULL) && (uuidlen == sizeof(uuid_t))) {
 211                 kernel_uuid = uuid;
 212                 uuid_unparse_upper(*(uuid_t *)uuid, kernel_uuid_string);
 213         }
 214
 215         simple_lock_init(&panic_lock, 0);
 216         panic_is_inited = 1;
 217         panic_caller = 0;
 218 }
 219
 220 void
 221 debug_log_init(void)
 222 {
 223         if (debug_buf_size != 0)
 224                 return;
 225 #if (defined(__arm64__) || defined(NAND_PANIC_DEVICE)) && !defined(LEGACY_PANIC_LOGS)
 226         if (!gPanicBase) {
 227                 printf("debug_log_init: Error!! gPanicBase is still not initialized\n");
 228                 return;
 229         }
 230         /* Shift debug buf start location and size by 8 bytes for magic header and crc value */
 231         debug_buf_addr = (char*)gPanicBase + 8;
 232         debug_buf_ptr = debug_buf_addr;
 233         debug_buf_size = gPanicSize - 8;
 234 #else
 235         debug_buf_addr = debug_buf;
 236         debug_buf_ptr = debug_buf;
 237         debug_buf_size = sizeof(debug_buf);
 238 #endif
 239 }
 240
 241 #if defined(__i386__) || defined(__x86_64__)
 242 #define panic_stop()    pmCPUHalt(PM_HALT_PANIC)
 243 #define panic_safe()    pmSafeMode(x86_lcpu(), PM_SAFE_FL_SAFE)
 244 #define panic_normal()  pmSafeMode(x86_lcpu(), PM_SAFE_FL_NORMAL)
 245 #else
 246 #define panic_stop()    { while (1) ; }
 247 #define panic_safe()
 248 #define panic_normal()
 249 #endif
 250
 251 /*
 252  * Prevent CPP from breaking the definition below,
 253  * since all clients get a #define to prepend line numbers
 254  */
 255 #undef panic
 256
 257 void _consume_panic_args(int a __unused, ...)
 258 {
 259     panic("panic");
 260 }
 261
 262 extern unsigned int write_trace_on_panic;
 263
 264 static spl_t
 265 panic_prologue(const char *str)
 266 {
 267         spl_t   s;
 268
 269         if (write_trace_on_panic && kdebug_enable) {
 270                 if (get_preemption_level() == 0 && !ml_at_interrupt_context()) {
 271                         ml_set_interrupts_enabled(TRUE);
 272                         kdbg_dump_trace_to_file("/var/tmp/panic.trace");
 273                 }
 274         }
 275
 276         s = splhigh();
 277         disable_preemption();
 278
 279 #if     defined(__i386__) || defined(__x86_64__)
 280         /* Attempt to display the unparsed panic string */
 281         const char *tstr = str;
 282
 283         kprintf("Panic initiated, string: ");
 284         while (tstr && *tstr)
 285                 kprintf("%c", *tstr++);
 286         kprintf("\n");
 287 #endif
 288
 289         panic_safe();
 290
 291         if( logPanicDataToScreen )
 292                 disable_debug_output = FALSE;
 293
 294         debug_mode = TRUE;
 295
 296 restart:
 297         PANIC_LOCK();
 298
 299         if (panicstr) {
 300                 if (cpu_number() != paniccpu) {
 301                         PANIC_UNLOCK();
 302                         /*
 303                          * Wait until message has been printed to identify correct
 304                          * cpu that made the first panic.
 305                          */
 306                         while (panicwait)
 307                                 continue;
 308                         goto restart;
 309             } else {
 310                         nestedpanic +=1;
 311                         PANIC_UNLOCK();
 312                         Debugger("double panic");
 313                         printf("double panic:  We are hanging here...\n");
 314                         panic_stop();
 315                         /* NOTREACHED */
 316                 }
 317         }
 318         panicstr = str;
 319         paniccpu = cpu_number();
 320         panicwait = 1;
 321
 322         PANIC_UNLOCK();
 323         return(s);
 324 }
 325
 326
 327 static void
 328 panic_epilogue(spl_t    s)
 329 {
 330         /*
 331          * Release panicstr so that we can handle normally other panics.
 332          */
 333         PANIC_LOCK();
 334         panicstr = (char *)0;
 335         PANIC_UNLOCK();
 336
 337         if (return_on_panic) {
 338                 panic_normal();
 339                 enable_preemption();
 340                 splx(s);
 341                 return;
 342         }
 343         kdb_printf("panic: We are hanging here...\n");
 344         panic_stop();
 345         /* NOTREACHED */
 346 }
 347
 348 void
 349 panic(const char *str, ...)
 350 {
 351         va_list listp;
 352         spl_t   s;
 353
 354
 355         /* panic_caller is initialized to 0.  If set, don't change it */
 356         if ( ! panic_caller )
 357                 panic_caller = (unsigned long)(char *)__builtin_return_address(0);
 358
 359         s = panic_prologue(str);
 360         kdb_printf("panic(cpu %d caller 0x%lx): ", (unsigned) paniccpu, panic_caller);
 361         if (str) {
 362                 va_start(listp, str);
 363                 _doprnt(str, &listp, consdebug_putc, 0);
 364                 va_end(listp);
 365         }
 366         kdb_printf("\n");
 367
 368         /*
 369          * Release panicwait indicator so that other cpus may call Debugger().
 370          */
 371         panicwait = 0;
 372         Debugger("panic");
 373         panic_epilogue(s);
 374 }
 375
 376 void
 377 panic_context(unsigned int reason, void *ctx, const char *str, ...)
 378 {
 379         va_list listp;
 380         spl_t   s;
 381
 382
 383         /* panic_caller is initialized to 0.  If set, don't change it */
 384         if ( ! panic_caller )
 385                 panic_caller = (unsigned long)(char *)__builtin_return_address(0);
 386
 387         s = panic_prologue(str);
 388         kdb_printf("panic(cpu %d caller 0x%lx): ", (unsigned) paniccpu, panic_caller);
 389         if (str) {
 390                 va_start(listp, str);
 391                 _doprnt(str, &listp, consdebug_putc, 0);
 392                 va_end(listp);
 393         }
 394         kdb_printf("\n");
 395
 396         /*
 397          * Release panicwait indicator so that other cpus may call Debugger().
 398          */
 399         panicwait = 0;
 400         DebuggerWithContext(reason, ctx, "panic");
 401         panic_epilogue(s);
 402 }
 403
 404 void
 405 log(__unused int level, char *fmt, ...)
 406 {
 407         va_list listp;
 408
 409 #ifdef lint
 410         level++;
 411 #endif /* lint */
 412 #ifdef  MACH_BSD
 413         disable_preemption();
 414         va_start(listp, fmt);
 415         _doprnt(fmt, &listp, conslog_putc, 0);
 416         va_end(listp);
 417         enable_preemption();
 418 #endif
 419 }
 420
 421 void
 422 debug_putc(char c)
 423 {
 424         if ((debug_buf_size != 0) &&
 425                 ((debug_buf_ptr-debug_buf_addr) < (int)debug_buf_size)) {
 426                 *debug_buf_ptr=c;
 427                 debug_buf_ptr++;
 428         }
 429 }
 430
 431 /* In-place packing routines -- inefficient, but they're called at most once.
 432  * Assumes "buflen" is a multiple of 8.
 433  */
 434
 435 int packA(char *inbuf, uint32_t length, uint32_t buflen)
 436 {
 437   unsigned int i, j = 0;
 438   pasc_t pack;
 439
 440   length = MIN(((length + 7) & ~7), buflen);
 441
 442   for (i = 0; i < length; i+=8)
 443     {
 444       pack.a = inbuf[i];
 445       pack.b = inbuf[i+1];
 446       pack.c = inbuf[i+2];
 447       pack.d = inbuf[i+3];
 448       pack.e = inbuf[i+4];
 449       pack.f = inbuf[i+5];
 450       pack.g = inbuf[i+6];
 451       pack.h = inbuf[i+7];
 452       bcopy ((char *) &pack, inbuf + j, 7);
 453       j += 7;
 454     }
 455   return j;
 456 }
 457
 458 void unpackA(char *inbuf, uint32_t length)
 459 {
 460         pasc_t packs;
 461         unsigned i = 0;
 462         length = (length * 8)/7;
 463
 464         while (i < length) {
 465           packs = *(pasc_t *)&inbuf[i];
 466           bcopy(&inbuf[i+7], &inbuf[i+8], MAX(0, (int) (length - i - 8)));
 467           inbuf[i++] = packs.a;
 468           inbuf[i++] = packs.b;
 469           inbuf[i++] = packs.c;
 470           inbuf[i++] = packs.d;
 471           inbuf[i++] = packs.e;
 472           inbuf[i++] = packs.f;
 473           inbuf[i++] = packs.g;
 474           inbuf[i++] = packs.h;
 475         }
 476 }
 477
 478 extern void *proc_name_address(void *p);
 479
 480 static void
 481 panic_display_process_name(void) {
 482         char proc_name[32] = "Unknown";
 483         task_t ctask = 0;
 484         void *cbsd_info = 0;
 485
 486         if (ml_nofault_copy((vm_offset_t)&current_thread()->task, (vm_offset_t) &ctask, sizeof(task_t)) == sizeof(task_t))
 487                 if(ml_nofault_copy((vm_offset_t)&ctask->bsd_info, (vm_offset_t)&cbsd_info, sizeof(&ctask->bsd_info)) == sizeof(&ctask->bsd_info))
 488                         if (cbsd_info && (ml_nofault_copy((vm_offset_t) proc_name_address(cbsd_info), (vm_offset_t) &proc_name, sizeof(proc_name)) > 0))
 489                                 proc_name[sizeof(proc_name) - 1] = '\0';
 490         kdb_printf("\nBSD process name corresponding to current thread: %s\n", proc_name);
 491 }
 492
 493 unsigned        panic_active(void) {
 494         return ((panicstr != (char *) 0));
 495 }
 496
 497 void populate_model_name(char *model_string) {
 498         strlcpy(model_name, model_string, sizeof(model_name));
 499 }
 500
 501 void panic_display_model_name(void) {
 502         char tmp_model_name[sizeof(model_name)];
 503
 504         if (ml_nofault_copy((vm_offset_t) &model_name, (vm_offset_t) &tmp_model_name, sizeof(model_name)) != sizeof(model_name))
 505                 return;
 506
 507         tmp_model_name[sizeof(tmp_model_name) - 1] = '\0';
 508
 509         if (tmp_model_name[0] != 0)
 510                 kdb_printf("System model name: %s\n", tmp_model_name);
 511 }
 512
 513 void panic_display_kernel_uuid(void) {
 514         char tmp_kernel_uuid[sizeof(kernel_uuid_string)];
 515
 516         if (ml_nofault_copy((vm_offset_t) &kernel_uuid_string, (vm_offset_t) &tmp_kernel_uuid, sizeof(kernel_uuid_string)) != sizeof(kernel_uuid_string))
 517                 return;
 518
 519         if (tmp_kernel_uuid[0] != '\0')
 520                 kdb_printf("Kernel UUID: %s\n", tmp_kernel_uuid);
 521 }
 522
 523 void panic_display_kernel_aslr(void) {
 524         if (vm_kernel_slide) {
 525                 kdb_printf("Kernel slide:     0x%016lx\n", (unsigned long) vm_kernel_slide);
 526                 kdb_printf("Kernel text base: %p\n", (void *) vm_kernel_stext);
 527         }
 528 }
 529
 530 void panic_display_hibb(void) {
 531 #if defined(__i386__) || defined (__x86_64__)
 532         kdb_printf("__HIB  text base: %p\n", (void *) vm_hib_base);
 533 #endif
 534 }
 535
 536 static void panic_display_uptime(void) {
 537         uint64_t        uptime;
 538         absolutetime_to_nanoseconds(mach_absolute_time(), &uptime);
 539
 540         kdb_printf("\nSystem uptime in nanoseconds: %llu\n", uptime);
 541 }
 542
 543 extern const char version[];
 544 extern char osversion[];
 545
 546 static volatile uint32_t config_displayed = 0;
 547
 548 __private_extern__ void panic_display_system_configuration(void) {
 549
 550         panic_display_process_name();
 551         if (OSCompareAndSwap(0, 1, &config_displayed)) {
 552                 char buf[256];
 553                 if (strlcpy(buf, PE_boot_args(), sizeof(buf)))
 554                         kdb_printf("Boot args: %s\n", buf);
 555                 kdb_printf("\nMac OS version:\n%s\n",
 556                     (osversion[0] != 0) ? osversion : "Not yet set");
 557                 kdb_printf("\nKernel version:\n%s\n",version);
 558                 panic_display_kernel_uuid();
 559                 panic_display_kernel_aslr();
 560                 panic_display_hibb();
 561                 panic_display_pal_info();
 562                 panic_display_model_name();
 563                 panic_display_uptime();
 564                 panic_display_zprint();
 565 #if CONFIG_ZLEAKS
 566                 panic_display_ztrace();
 567 #endif /* CONFIG_ZLEAKS */
 568                 kext_dump_panic_lists(&kdb_log);
 569         }
 570 }
 571
 572 extern zone_t           first_zone;
 573 extern unsigned int     num_zones, stack_total;
 574 extern unsigned long long stack_allocs;
 575
 576 #if defined(__i386__) || defined (__x86_64__)
 577 extern unsigned int     inuse_ptepages_count;
 578 extern long long alloc_ptepages_count;
 579 #endif
 580
 581 extern boolean_t        panic_include_zprint;
 582
 583 __private_extern__ void panic_display_zprint()
 584 {
 585         if(panic_include_zprint == TRUE) {
 586
 587                 unsigned int    i;
 588                 struct zone     zone_copy;
 589
 590                 if(first_zone!=NULL) {
 591                         if(ml_nofault_copy((vm_offset_t)first_zone, (vm_offset_t)&zone_copy, sizeof(struct zone)) == sizeof(struct zone)) {
 592                                 for (i = 0; i < num_zones; i++) {
 593                                         if(zone_copy.cur_size > (1024*1024)) {
 594                                                 kdb_printf("%.20s:%lu\n",zone_copy.zone_name,(uintptr_t)zone_copy.cur_size);
 595                                         }
 596
 597                                         if(zone_copy.next_zone == NULL) {
 598                                                 break;
 599                                         }
 600
 601                                         if(ml_nofault_copy((vm_offset_t)zone_copy.next_zone, (vm_offset_t)&zone_copy, sizeof(struct zone)) != sizeof(struct zone)) {
 602                                                 break;
 603                                         }
 604                                 }
 605                         }
 606                 }
 607
 608                 kdb_printf("Kernel Stacks:%lu\n",(uintptr_t)(kernel_stack_size * stack_total));
 609
 610 #if defined(__i386__) || defined (__x86_64__)
 611                 kdb_printf("PageTables:%lu\n",(uintptr_t)(PAGE_SIZE * inuse_ptepages_count));
 612 #endif
 613
 614                 kdb_printf("Kalloc.Large:%lu\n",(uintptr_t)kalloc_large_total);
 615         }
 616 }
 617
 618 #if CONFIG_ECC_LOGGING
 619 __private_extern__ void panic_display_ecc_errors()
 620 {
 621         uint32_t count = ecc_log_get_correction_count();
 622
 623         if (count > 0) {
 624                 kdb_printf("ECC Corrections:%u\n", count);
 625         }
 626 }
 627 #endif /* CONFIG_ECC_LOGGING */
 628
 629 #if CONFIG_ZLEAKS
 630 extern boolean_t        panic_include_ztrace;
 631 extern struct ztrace* top_ztrace;
 632 void panic_print_symbol_name(vm_address_t search);
 633
 634 /*
 635  * Prints the backtrace most suspected of being a leaker, if we paniced in the zone allocator.
 636  * top_ztrace and panic_include_ztrace comes from osfmk/kern/zalloc.c
 637  */
 638 __private_extern__ void panic_display_ztrace(void)
 639 {
 640         if(panic_include_ztrace == TRUE) {
 641                 unsigned int i = 0;
 642                 boolean_t keepsyms = FALSE;
 643
 644                 PE_parse_boot_argn("keepsyms", &keepsyms, sizeof (keepsyms));
 645                 struct ztrace top_ztrace_copy;
 646
 647                 /* Make sure not to trip another panic if there's something wrong with memory */
 648                 if(ml_nofault_copy((vm_offset_t)top_ztrace, (vm_offset_t)&top_ztrace_copy, sizeof(struct ztrace)) == sizeof(struct ztrace)) {
 649                         kdb_printf("\nBacktrace suspected of leaking: (outstanding bytes: %lu)\n", (uintptr_t)top_ztrace_copy.zt_size);
 650                         /* Print the backtrace addresses */
 651                         for (i = 0; (i < top_ztrace_copy.zt_depth && i < MAX_ZTRACE_DEPTH) ; i++) {
 652                                 kdb_printf("%p ", top_ztrace_copy.zt_stack[i]);
 653                                 if (keepsyms) {
 654                                         panic_print_symbol_name((vm_address_t)top_ztrace_copy.zt_stack[i]);
 655                                 }
 656                                 kdb_printf("\n");
 657                         }
 658                         /* Print any kexts in that backtrace, along with their link addresses so we can properly blame them */
 659                         kmod_panic_dump((vm_offset_t *)&top_ztrace_copy.zt_stack[0], top_ztrace_copy.zt_depth);
 660                 }
 661                 else {
 662                         kdb_printf("\nCan't access top_ztrace...\n");
 663                 }
 664                 kdb_printf("\n");
 665         }
 666 }
 667 #endif /* CONFIG_ZLEAKS */
 668
 669 #if ! (MACH_KDP && CONFIG_KDP_INTERACTIVE_DEBUGGING)
 670 static struct kdp_ether_addr kdp_current_mac_address = {{0, 0, 0, 0, 0, 0}};
 671
 672 /* XXX ugly forward declares to stop warnings */
 673 void *kdp_get_interface(void);
 674 void kdp_set_ip_and_mac_addresses(struct kdp_in_addr *, struct kdp_ether_addr *);
 675 void kdp_set_gateway_mac(void *);
 676 void kdp_set_interface(void *);
 677 void kdp_register_send_receive(void *, void *);
 678 void kdp_unregister_send_receive(void *, void *);
 679 void kdp_snapshot_preflight(int, void *, uint32_t, uint32_t);
 680 int kdp_stack_snapshot_geterror(void);
 681 int kdp_stack_snapshot_bytes_traced(void);
 682
 683 void *
 684 kdp_get_interface( void)
 685 {
 686         return(void *)0;
 687 }
 688
 689 unsigned int
 690 kdp_get_ip_address(void )
 691 { return 0; }
 692
 693 struct kdp_ether_addr
 694 kdp_get_mac_addr(void)
 695 {
 696         return kdp_current_mac_address;
 697 }
 698
 699 void
 700 kdp_set_ip_and_mac_addresses(
 701         __unused struct kdp_in_addr          *ipaddr,
 702         __unused struct kdp_ether_addr       *macaddr)
 703 {}
 704
 705 void
 706 kdp_set_gateway_mac(__unused void *gatewaymac)
 707 {}
 708
 709 void
 710 kdp_set_interface(__unused void *ifp)
 711 {}
 712
 713 void
 714 kdp_register_send_receive(__unused void *send, __unused void *receive)
 715 {}
 716
 717 void
 718 kdp_unregister_send_receive(__unused void *send, __unused void *receive)
 719 {}
 720
 721 void kdp_register_link(__unused kdp_link_t link, __unused kdp_mode_t mode)
 722 {}
 723
 724 void kdp_unregister_link(__unused kdp_link_t link, __unused kdp_mode_t mode)
 725 {}
 726
 727 #endif
 728
 729 #if !CONFIG_TELEMETRY
 730 int telemetry_gather(user_addr_t buffer __unused, uint32_t *length __unused, boolean_t mark __unused)
 731 {
 732         return KERN_NOT_SUPPORTED;
 733 }
 734 #endif