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
 105 int mach_assert = 1;
 106
 107 const char              *panicstr = (char *) 0;
 108 decl_simple_lock_data(,panic_lock)
 109 int                     paniccpu;
 110 volatile int            panicwait;
 111 volatile unsigned int   nestedpanic= 0;
 112 unsigned int            panic_is_inited = 0;
 113 unsigned int            return_on_panic = 0;
 114 unsigned long           panic_caller;
 115
 116 #define DEBUG_BUF_SIZE (3 * PAGE_SIZE)
 117
 118 /* debug_buf is directly linked with iBoot panic region for ARM64 targets */
 119 #if (defined(__arm64__) || defined(NAND_PANIC_DEVICE)) && !defined(LEGACY_PANIC_LOGS)
 120 char *debug_buf_addr = NULL;
 121 char *debug_buf_ptr = NULL;
 122 unsigned int debug_buf_size = 0;
 123 #else
 124 char debug_buf[DEBUG_BUF_SIZE];
 125 __used char *debug_buf_addr = debug_buf;
 126 char *debug_buf_ptr = debug_buf;
 127 unsigned int debug_buf_size = sizeof(debug_buf);
 128 #endif
 129
 130 static char model_name[64];
 131 unsigned char *kernel_uuid;
 132 /* uuid_string_t */ char kernel_uuid_string[37];
 133
 134 static spl_t panic_prologue(const char *str);
 135 static void panic_epilogue(spl_t s);
 136
 137 struct pasc {
 138   unsigned a: 7;
 139   unsigned b: 7;
 140   unsigned c: 7;
 141   unsigned d: 7;
 142   unsigned e: 7;
 143   unsigned f: 7;
 144   unsigned g: 7;
 145   unsigned h: 7;
 146 }  __attribute__((packed));
 147
 148 typedef struct pasc pasc_t;
 149
 150 /* Prevent CPP from breaking the definition below */
 151 #if CONFIG_NO_PANIC_STRINGS
 152 #undef Assert
 153 #endif
 154
 155 void __attribute__((noinline))
 156 Assert(
 157         const char      *file,
 158         int             line,
 159         const char      *expression
 160       )
 161 {
 162         int saved_return_on_panic;
 163
 164         if (!mach_assert) {
 165                 return;
 166         }
 167
 168         saved_return_on_panic = return_on_panic;
 169
 170         /*
 171          * If we don't have a debugger configured, returning from an
 172          * assert is a bad, bad idea; there is no guarantee that we
 173          * didn't simply assert before we were able to restart the
 174          * platform.
 175          */
 176         if (current_debugger != NO_CUR_DB)
 177                 return_on_panic = 1;
 178
 179         panic_plain("%s:%d Assertion failed: %s", file, line, expression);
 180
 181         return_on_panic = saved_return_on_panic;
 182 }
 183
 184 /*
 185  *      Carefully use the panic_lock.  There's always a chance that
 186  *      somehow we'll call panic before getting to initialize the
 187  *      panic_lock -- in this case, we'll assume that the world is
 188  *      in uniprocessor mode and just avoid using the panic lock.
 189  */
 190 #define PANIC_LOCK()                                                    \
 191 MACRO_BEGIN                                                             \
 192         if (panic_is_inited)                                            \
 193                 simple_lock(&panic_lock);                               \
 194 MACRO_END
 195
 196 #define PANIC_UNLOCK()                                                  \
 197 MACRO_BEGIN                                                             \
 198         if (panic_is_inited)                                            \
 199                 simple_unlock(&panic_lock);                             \
 200 MACRO_END
 201
 202 void
 203 panic_init(void)
 204 {
 205         unsigned long uuidlen = 0;
 206         void *uuid;
 207
 208         uuid = getuuidfromheader(&_mh_execute_header, &uuidlen);
 209         if ((uuid != NULL) && (uuidlen == sizeof(uuid_t))) {
 210                 kernel_uuid = uuid;
 211                 uuid_unparse_upper(*(uuid_t *)uuid, kernel_uuid_string);
 212         }
 213
 214         simple_lock_init(&panic_lock, 0);
 215         panic_is_inited = 1;
 216         panic_caller = 0;
 217 }
 218
 219 void
 220 debug_log_init(void)
 221 {
 222         if (debug_buf_size != 0)
 223                 return;
 224 #if (defined(__arm64__) || defined(NAND_PANIC_DEVICE)) && !defined(LEGACY_PANIC_LOGS)
 225         if (!gPanicBase) {
 226                 printf("debug_log_init: Error!! gPanicBase is still not initialized\n");
 227                 return;
 228         }
 229         /* Shift debug buf start location and size by 8 bytes for magic header and crc value */
 230         debug_buf_addr = (char*)gPanicBase + 8;
 231         debug_buf_ptr = debug_buf_addr;
 232         debug_buf_size = gPanicSize - 8;
 233 #else
 234         debug_buf_addr = debug_buf;
 235         debug_buf_ptr = debug_buf;
 236         debug_buf_size = sizeof(debug_buf);
 237 #endif
 238 }
 239
 240 #if defined(__i386__) || defined(__x86_64__)
 241 #define panic_stop()    pmCPUHalt(PM_HALT_PANIC)
 242 #define panic_safe()    pmSafeMode(x86_lcpu(), PM_SAFE_FL_SAFE)
 243 #define panic_normal()  pmSafeMode(x86_lcpu(), PM_SAFE_FL_NORMAL)
 244 #else
 245 #define panic_stop()    { while (1) ; }
 246 #define panic_safe()
 247 #define panic_normal()
 248 #endif
 249
 250 /*
 251  * Prevent CPP from breaking the definition below,
 252  * since all clients get a #define to prepend line numbers
 253  */
 254 #undef panic
 255
 256 void _consume_panic_args(int a __unused, ...)
 257 {
 258     panic("panic");
 259 }
 260
 261 extern unsigned int write_trace_on_panic;
 262
 263 static spl_t
 264 panic_prologue(const char *str)
 265 {
 266         spl_t   s;
 267
 268         if (write_trace_on_panic && kdebug_enable) {
 269                 if (get_preemption_level() == 0 && !ml_at_interrupt_context()) {
 270                         ml_set_interrupts_enabled(TRUE);
 271                         kdbg_dump_trace_to_file("/var/tmp/panic.trace");
 272                 }
 273         }
 274
 275         s = splhigh();
 276         disable_preemption();
 277
 278 #if     defined(__i386__) || defined(__x86_64__)
 279         /* Attempt to display the unparsed panic string */
 280         const char *tstr = str;
 281
 282         kprintf("Panic initiated, string: ");
 283         while (tstr && *tstr)
 284                 kprintf("%c", *tstr++);
 285         kprintf("\n");
 286 #endif
 287
 288         panic_safe();
 289
 290         if( logPanicDataToScreen )
 291                 disable_debug_output = FALSE;
 292
 293         debug_mode = TRUE;
 294
 295 restart:
 296         PANIC_LOCK();
 297
 298         if (panicstr) {
 299                 if (cpu_number() != paniccpu) {
 300                         PANIC_UNLOCK();
 301                         /*
 302                          * Wait until message has been printed to identify correct
 303                          * cpu that made the first panic.
 304                          */
 305                         while (panicwait)
 306                                 continue;
 307                         goto restart;
 308             } else {
 309                         nestedpanic +=1;
 310                         PANIC_UNLOCK();
 311                         Debugger("double panic");
 312                         printf("double panic:  We are hanging here...\n");
 313                         panic_stop();
 314                         /* NOTREACHED */
 315                 }
 316         }
 317         panicstr = str;
 318         paniccpu = cpu_number();
 319         panicwait = 1;
 320
 321         PANIC_UNLOCK();
 322         return(s);
 323 }
 324
 325
 326 static void
 327 panic_epilogue(spl_t    s)
 328 {
 329         /*
 330          * Release panicstr so that we can handle normally other panics.
 331          */
 332         PANIC_LOCK();
 333         panicstr = (char *)0;
 334         PANIC_UNLOCK();
 335
 336         if (return_on_panic) {
 337                 panic_normal();
 338                 enable_preemption();
 339                 splx(s);
 340                 return;
 341         }
 342         kdb_printf("panic: We are hanging here...\n");
 343         panic_stop();
 344         /* NOTREACHED */
 345 }
 346
 347 void
 348 panic(const char *str, ...)
 349 {
 350         va_list listp;
 351         spl_t   s;
 352
 353
 354         /* panic_caller is initialized to 0.  If set, don't change it */
 355         if ( ! panic_caller )
 356                 panic_caller = (unsigned long)(char *)__builtin_return_address(0);
 357
 358         s = panic_prologue(str);
 359         kdb_printf("panic(cpu %d caller 0x%lx): ", (unsigned) paniccpu, panic_caller);
 360         if (str) {
 361                 va_start(listp, str);
 362                 _doprnt(str, &listp, consdebug_putc, 0);
 363                 va_end(listp);
 364         }
 365         kdb_printf("\n");
 366
 367         /*
 368          * Release panicwait indicator so that other cpus may call Debugger().
 369          */
 370         panicwait = 0;
 371         Debugger("panic");
 372         panic_epilogue(s);
 373 }
 374
 375 void
 376 panic_context(unsigned int reason, void *ctx, const char *str, ...)
 377 {
 378         va_list listp;
 379         spl_t   s;
 380
 381
 382         /* panic_caller is initialized to 0.  If set, don't change it */
 383         if ( ! panic_caller )
 384                 panic_caller = (unsigned long)(char *)__builtin_return_address(0);
 385
 386         s = panic_prologue(str);
 387         kdb_printf("panic(cpu %d caller 0x%lx): ", (unsigned) paniccpu, panic_caller);
 388         if (str) {
 389                 va_start(listp, str);
 390                 _doprnt(str, &listp, consdebug_putc, 0);
 391                 va_end(listp);
 392         }
 393         kdb_printf("\n");
 394
 395         /*
 396          * Release panicwait indicator so that other cpus may call Debugger().
 397          */
 398         panicwait = 0;
 399         DebuggerWithContext(reason, ctx, "panic");
 400         panic_epilogue(s);
 401 }
 402
 403 void
 404 log(__unused int level, char *fmt, ...)
 405 {
 406         va_list listp;
 407
 408 #ifdef lint
 409         level++;
 410 #endif /* lint */
 411 #ifdef  MACH_BSD
 412         disable_preemption();
 413         va_start(listp, fmt);
 414         _doprnt(fmt, &listp, conslog_putc, 0);
 415         va_end(listp);
 416         enable_preemption();
 417 #endif
 418 }
 419
 420 void
 421 debug_putc(char c)
 422 {
 423         if ((debug_buf_size != 0) &&
 424                 ((debug_buf_ptr-debug_buf_addr) < (int)debug_buf_size)) {
 425                 *debug_buf_ptr=c;
 426                 debug_buf_ptr++;
 427         }
 428 }
 429
 430 /* In-place packing routines -- inefficient, but they're called at most once.
 431  * Assumes "buflen" is a multiple of 8.
 432  */
 433
 434 int packA(char *inbuf, uint32_t length, uint32_t buflen)
 435 {
 436   unsigned int i, j = 0;
 437   pasc_t pack;
 438
 439   length = MIN(((length + 7) & ~7), buflen);
 440
 441   for (i = 0; i < length; i+=8)
 442     {
 443       pack.a = inbuf[i];
 444       pack.b = inbuf[i+1];
 445       pack.c = inbuf[i+2];
 446       pack.d = inbuf[i+3];
 447       pack.e = inbuf[i+4];
 448       pack.f = inbuf[i+5];
 449       pack.g = inbuf[i+6];
 450       pack.h = inbuf[i+7];
 451       bcopy ((char *) &pack, inbuf + j, 7);
 452       j += 7;
 453     }
 454   return j;
 455 }
 456
 457 void unpackA(char *inbuf, uint32_t length)
 458 {
 459         pasc_t packs;
 460         unsigned i = 0;
 461         length = (length * 8)/7;
 462
 463         while (i < length) {
 464           packs = *(pasc_t *)&inbuf[i];
 465           bcopy(&inbuf[i+7], &inbuf[i+8], MAX(0, (int) (length - i - 8)));
 466           inbuf[i++] = packs.a;
 467           inbuf[i++] = packs.b;
 468           inbuf[i++] = packs.c;
 469           inbuf[i++] = packs.d;
 470           inbuf[i++] = packs.e;
 471           inbuf[i++] = packs.f;
 472           inbuf[i++] = packs.g;
 473           inbuf[i++] = packs.h;
 474         }
 475 }
 476
 477 extern void *proc_name_address(void *p);
 478
 479 static void
 480 panic_display_process_name(void) {
 481         char proc_name[32] = "Unknown";
 482         task_t ctask = 0;
 483         void *cbsd_info = 0;
 484
 485         if (ml_nofault_copy((vm_offset_t)&current_thread()->task, (vm_offset_t) &ctask, sizeof(task_t)) == sizeof(task_t))
 486                 if(ml_nofault_copy((vm_offset_t)&ctask->bsd_info, (vm_offset_t)&cbsd_info, sizeof(&ctask->bsd_info)) == sizeof(&ctask->bsd_info))
 487                         if (cbsd_info && (ml_nofault_copy((vm_offset_t) proc_name_address(cbsd_info), (vm_offset_t) &proc_name, sizeof(proc_name)) > 0))
 488                                 proc_name[sizeof(proc_name) - 1] = '\0';
 489         kdb_printf("\nBSD process name corresponding to current thread: %s\n", proc_name);
 490 }
 491
 492 unsigned        panic_active(void) {
 493         return ((panicstr != (char *) 0));
 494 }
 495
 496 void populate_model_name(char *model_string) {
 497         strlcpy(model_name, model_string, sizeof(model_name));
 498 }
 499
 500 static void panic_display_model_name(void) {
 501         char tmp_model_name[sizeof(model_name)];
 502
 503         if (ml_nofault_copy((vm_offset_t) &model_name, (vm_offset_t) &tmp_model_name, sizeof(model_name)) != sizeof(model_name))
 504                 return;
 505
 506         tmp_model_name[sizeof(tmp_model_name) - 1] = '\0';
 507
 508         if (tmp_model_name[0] != 0)
 509                 kdb_printf("System model name: %s\n", tmp_model_name);
 510 }
 511
 512 static void panic_display_kernel_uuid(void) {
 513         char tmp_kernel_uuid[sizeof(kernel_uuid_string)];
 514
 515         if (ml_nofault_copy((vm_offset_t) &kernel_uuid_string, (vm_offset_t) &tmp_kernel_uuid, sizeof(kernel_uuid_string)) != sizeof(kernel_uuid_string))
 516                 return;
 517
 518         if (tmp_kernel_uuid[0] != '\0')
 519                 kdb_printf("Kernel UUID: %s\n", tmp_kernel_uuid);
 520 }
 521
 522 void panic_display_kernel_aslr(void) {
 523         if (vm_kernel_slide) {
 524                 kdb_printf("Kernel slide:     0x%016lx\n", (unsigned long) vm_kernel_slide);
 525                 kdb_printf("Kernel text base: %p\n", (void *) vm_kernel_stext);
 526         }
 527 }
 528
 529 void panic_display_hibb(void) {
 530 #if defined(__i386__) || defined (__x86_64__)
 531         kdb_printf("__HIB  text base: %p\n", (void *) vm_hib_base);
 532 #endif
 533 }
 534
 535 static void panic_display_uptime(void) {
 536         uint64_t        uptime;
 537         absolutetime_to_nanoseconds(mach_absolute_time(), &uptime);
 538
 539         kdb_printf("\nSystem uptime in nanoseconds: %llu\n", uptime);
 540 }
 541
 542 extern const char version[];
 543 extern char osversion[];
 544
 545 static volatile uint32_t config_displayed = 0;
 546
 547 __private_extern__ void panic_display_system_configuration(void) {
 548
 549         panic_display_process_name();
 550         if (OSCompareAndSwap(0, 1, &config_displayed)) {
 551                 char buf[256];
 552                 if (strlcpy(buf, PE_boot_args(), sizeof(buf)))
 553                         kdb_printf("Boot args: %s\n", buf);
 554                 kdb_printf("\nMac OS version:\n%s\n",
 555                     (osversion[0] != 0) ? osversion : "Not yet set");
 556                 kdb_printf("\nKernel version:\n%s\n",version);
 557                 panic_display_kernel_uuid();
 558                 panic_display_kernel_aslr();
 559                 panic_display_hibb();
 560                 panic_display_pal_info();
 561                 panic_display_model_name();
 562                 panic_display_uptime();
 563                 panic_display_zprint();
 564 #if CONFIG_ZLEAKS
 565                 panic_display_ztrace();
 566 #endif /* CONFIG_ZLEAKS */
 567                 kext_dump_panic_lists(&kdb_log);
 568         }
 569 }
 570
 571 extern zone_t           first_zone;
 572 extern unsigned int     num_zones, stack_total;
 573 extern unsigned long long stack_allocs;
 574
 575 #if defined(__i386__) || defined (__x86_64__)
 576 extern unsigned int     inuse_ptepages_count;
 577 extern long long alloc_ptepages_count;
 578 #endif
 579
 580 extern boolean_t        panic_include_zprint;
 581
 582 __private_extern__ void panic_display_zprint()
 583 {
 584         if(panic_include_zprint == TRUE) {
 585
 586                 unsigned int    i;
 587                 struct zone     zone_copy;
 588
 589                 if(first_zone!=NULL) {
 590                         if(ml_nofault_copy((vm_offset_t)first_zone, (vm_offset_t)&zone_copy, sizeof(struct zone)) == sizeof(struct zone)) {
 591                                 for (i = 0; i < num_zones; i++) {
 592                                         if(zone_copy.cur_size > (1024*1024)) {
 593                                                 kdb_printf("%.20s:%lu\n",zone_copy.zone_name,(uintptr_t)zone_copy.cur_size);
 594                                         }
 595
 596                                         if(zone_copy.next_zone == NULL) {
 597                                                 break;
 598                                         }
 599
 600                                         if(ml_nofault_copy((vm_offset_t)zone_copy.next_zone, (vm_offset_t)&zone_copy, sizeof(struct zone)) != sizeof(struct zone)) {
 601                                                 break;
 602                                         }
 603                                 }
 604                         }
 605                 }
 606
 607                 kdb_printf("Kernel Stacks:%lu\n",(uintptr_t)(kernel_stack_size * stack_total));
 608
 609 #if defined(__i386__) || defined (__x86_64__)
 610                 kdb_printf("PageTables:%lu\n",(uintptr_t)(PAGE_SIZE * inuse_ptepages_count));
 611 #endif
 612
 613                 kdb_printf("Kalloc.Large:%lu\n",(uintptr_t)kalloc_large_total);
 614         }
 615 }
 616
 617 #if CONFIG_ECC_LOGGING
 618 __private_extern__ void panic_display_ecc_errors()
 619 {
 620         uint32_t count = ecc_log_get_correction_count();
 621
 622         if (count > 0) {
 623                 kdb_printf("ECC Corrections:%u\n", count);
 624         }
 625 }
 626 #endif /* CONFIG_ECC_LOGGING */
 627
 628 #if CONFIG_ZLEAKS
 629 extern boolean_t        panic_include_ztrace;
 630 extern struct ztrace* top_ztrace;
 631 /*
 632  * Prints the backtrace most suspected of being a leaker, if we paniced in the zone allocator.
 633  * top_ztrace and panic_include_ztrace comes from osfmk/kern/zalloc.c
 634  */
 635 __private_extern__ void panic_display_ztrace(void)
 636 {
 637         if(panic_include_ztrace == TRUE) {
 638                 unsigned int i = 0;
 639                 struct ztrace top_ztrace_copy;
 640
 641                 /* Make sure not to trip another panic if there's something wrong with memory */
 642                 if(ml_nofault_copy((vm_offset_t)top_ztrace, (vm_offset_t)&top_ztrace_copy, sizeof(struct ztrace)) == sizeof(struct ztrace)) {
 643                         kdb_printf("\nBacktrace suspected of leaking: (outstanding bytes: %lu)\n", (uintptr_t)top_ztrace_copy.zt_size);
 644                         /* Print the backtrace addresses */
 645                         for (i = 0; (i < top_ztrace_copy.zt_depth && i < MAX_ZTRACE_DEPTH) ; i++) {
 646                                 kdb_printf("%p\n", top_ztrace_copy.zt_stack[i]);
 647                         }
 648                         /* Print any kexts in that backtrace, along with their link addresses so we can properly blame them */
 649                         kmod_panic_dump((vm_offset_t *)&top_ztrace_copy.zt_stack[0], top_ztrace_copy.zt_depth);
 650                 }
 651                 else {
 652                         kdb_printf("\nCan't access top_ztrace...\n");
 653                 }
 654                 kdb_printf("\n");
 655         }
 656 }
 657 #endif /* CONFIG_ZLEAKS */
 658
 659 #if ! (MACH_KDP && CONFIG_KDP_INTERACTIVE_DEBUGGING)
 660 static struct kdp_ether_addr kdp_current_mac_address = {{0, 0, 0, 0, 0, 0}};
 661
 662 /* XXX ugly forward declares to stop warnings */
 663 void *kdp_get_interface(void);
 664 void kdp_set_ip_and_mac_addresses(struct kdp_in_addr *, struct kdp_ether_addr *);
 665 void kdp_set_gateway_mac(void *);
 666 void kdp_set_interface(void *);
 667 void kdp_register_send_receive(void *, void *);
 668 void kdp_unregister_send_receive(void *, void *);
 669 void kdp_snapshot_preflight(int, void *, uint32_t, uint32_t);
 670 int kdp_stack_snapshot_geterror(void);
 671 int kdp_stack_snapshot_bytes_traced(void);
 672
 673 void *
 674 kdp_get_interface( void)
 675 {
 676         return(void *)0;
 677 }
 678
 679 unsigned int
 680 kdp_get_ip_address(void )
 681 { return 0; }
 682
 683 struct kdp_ether_addr
 684 kdp_get_mac_addr(void)
 685 {
 686         return kdp_current_mac_address;
 687 }
 688
 689 void
 690 kdp_set_ip_and_mac_addresses(
 691         __unused struct kdp_in_addr          *ipaddr,
 692         __unused struct kdp_ether_addr       *macaddr)
 693 {}
 694
 695 void
 696 kdp_set_gateway_mac(__unused void *gatewaymac)
 697 {}
 698
 699 void
 700 kdp_set_interface(__unused void *ifp)
 701 {}
 702
 703 void
 704 kdp_register_send_receive(__unused void *send, __unused void *receive)
 705 {}
 706
 707 void
 708 kdp_unregister_send_receive(__unused void *send, __unused void *receive)
 709 {}
 710
 711 void kdp_register_link(__unused kdp_link_t link, __unused kdp_mode_t mode)
 712 {}
 713
 714 void kdp_unregister_link(__unused kdp_link_t link, __unused kdp_mode_t mode)
 715 {}
 716
 717 #endif
 718
 719 #if !CONFIG_TELEMETRY
 720 int telemetry_gather(user_addr_t buffer __unused, uint32_t *length __unused, boolean_t mark __unused)
 721 {
 722         return KERN_NOT_SUPPORTED;
 723 }
 724 #endif