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 <kern/kern_cdata.h>
  71 #include <vm/vm_kern.h>
  72 #include <vm/pmap.h>
  73 #include <stdarg.h>
  74 #if !(MACH_KDP && CONFIG_KDP_INTERACTIVE_DEBUGGING)
  75 #include <kdp/kdp_udp.h>
  76 #endif
  77
  78 #if defined(__i386__) || defined(__x86_64__)
  79 #include <i386/cpu_threads.h>
  80 #include <i386/pmCPU.h>
  81 #endif
  82
  83 #include <IOKit/IOPlatformExpert.h>
  84 #include <machine/pal_routines.h>
  85
  86 #include <sys/kdebug.h>
  87 #include <libkern/OSKextLibPrivate.h>
  88 #include <libkern/OSAtomic.h>
  89 #include <libkern/kernel_mach_header.h>
  90 #include <uuid/uuid.h>
  91 #include <mach_debug/zone_info.h>
  92
  93 #if (defined(__arm64__) || defined(NAND_PANIC_DEVICE)) && !defined(LEGACY_PANIC_LOGS)
  94 #include <pexpert/pexpert.h> /* For gPanicBase */
  95 #endif
  96
  97 unsigned int    halt_in_debugger = 0;
  98 unsigned int    switch_debugger = 0;
  99 unsigned int    current_debugger = 0;
 100 unsigned int    active_debugger = 0;
 101 unsigned int    debug_mode=0;
 102 unsigned int    disable_debug_output = TRUE;
 103 unsigned int    systemLogDiags = FALSE;
 104 unsigned int    panicDebugging = FALSE;
 105 unsigned int    logPanicDataToScreen = FALSE;
 106 unsigned int    kdebug_serial = FALSE;
 107
 108 int mach_assert = 1;
 109
 110 const char              *panicstr = (char *) 0;
 111 decl_simple_lock_data(,panic_lock)
 112 int                     paniccpu;
 113 volatile int            panicwait;
 114 volatile unsigned int   nestedpanic= 0;
 115 unsigned int            panic_is_inited = 0;
 116 unsigned int            return_on_panic = 0;
 117 unsigned long           panic_caller;
 118
 119 #define DEBUG_BUF_SIZE (3 * PAGE_SIZE)
 120
 121 /* debug_buf is directly linked with iBoot panic region for ARM64 targets */
 122 #if (defined(__arm64__) || defined(NAND_PANIC_DEVICE)) && !defined(LEGACY_PANIC_LOGS)
 123 char *debug_buf_addr = NULL;
 124 char *debug_buf_ptr = NULL;
 125 unsigned int debug_buf_size = 0;
 126 #else
 127 char debug_buf[DEBUG_BUF_SIZE];
 128 __used char *debug_buf_addr = debug_buf;
 129 char *debug_buf_ptr = debug_buf;
 130 unsigned int debug_buf_size = sizeof(debug_buf);
 131 #endif
 132
 133 static char model_name[64];
 134 unsigned char *kernel_uuid;
 135 /* uuid_string_t */ char kernel_uuid_string[37];
 136
 137 static spl_t panic_prologue(const char *str);
 138 static void panic_epilogue(spl_t s);
 139
 140 struct pasc {
 141   unsigned a: 7;
 142   unsigned b: 7;
 143   unsigned c: 7;
 144   unsigned d: 7;
 145   unsigned e: 7;
 146   unsigned f: 7;
 147   unsigned g: 7;
 148   unsigned h: 7;
 149 }  __attribute__((packed));
 150
 151 typedef struct pasc pasc_t;
 152
 153 /* Prevent CPP from breaking the definition below */
 154 #if CONFIG_NO_PANIC_STRINGS
 155 #undef Assert
 156 #endif
 157
 158 void __attribute__((noinline))
 159 Assert(
 160         const char      *file,
 161         int             line,
 162         const char      *expression
 163       )
 164 {
 165         int saved_return_on_panic;
 166
 167         if (!mach_assert) {
 168                 kprintf("%s:%d non-fatal Assertion: %s", file, line, expression);
 169                 return;
 170         }
 171
 172         saved_return_on_panic = return_on_panic;
 173
 174         /*
 175          * If we don't have a debugger configured, returning from an
 176          * assert is a bad, bad idea; there is no guarantee that we
 177          * didn't simply assert before we were able to restart the
 178          * platform.
 179          */
 180         if (current_debugger != NO_CUR_DB)
 181                 return_on_panic = 1;
 182
 183         panic_plain("%s:%d Assertion failed: %s", file, line, expression);
 184
 185         return_on_panic = saved_return_on_panic;
 186 }
 187
 188 /*
 189  *      Carefully use the panic_lock.  There's always a chance that
 190  *      somehow we'll call panic before getting to initialize the
 191  *      panic_lock -- in this case, we'll assume that the world is
 192  *      in uniprocessor mode and just avoid using the panic lock.
 193  */
 194 #define PANIC_LOCK()                                                    \
 195 MACRO_BEGIN                                                             \
 196         if (panic_is_inited)                                            \
 197                 simple_lock(&panic_lock);                               \
 198 MACRO_END
 199
 200 #define PANIC_UNLOCK()                                                  \
 201 MACRO_BEGIN                                                             \
 202         if (panic_is_inited)                                            \
 203                 simple_unlock(&panic_lock);                             \
 204 MACRO_END
 205
 206 void
 207 panic_init(void)
 208 {
 209         unsigned long uuidlen = 0;
 210         void *uuid;
 211
 212         uuid = getuuidfromheader(&_mh_execute_header, &uuidlen);
 213         if ((uuid != NULL) && (uuidlen == sizeof(uuid_t))) {
 214                 kernel_uuid = uuid;
 215                 uuid_unparse_upper(*(uuid_t *)uuid, kernel_uuid_string);
 216         }
 217
 218         simple_lock_init(&panic_lock, 0);
 219         panic_is_inited = 1;
 220         panic_caller = 0;
 221
 222         if (!PE_parse_boot_argn("assertions", &mach_assert, sizeof(mach_assert))) {
 223                 mach_assert = 1;
 224         }
 225 }
 226
 227 void
 228 debug_log_init(void)
 229 {
 230         if (debug_buf_size != 0)
 231                 return;
 232 #if (defined(__arm64__) || defined(NAND_PANIC_DEVICE)) && !defined(LEGACY_PANIC_LOGS)
 233         if (!gPanicBase) {
 234                 printf("debug_log_init: Error!! gPanicBase is still not initialized\n");
 235                 return;
 236         }
 237         /* Shift debug buf start location and size by 8 bytes for magic header and crc value */
 238         debug_buf_addr = (char*)gPanicBase + 8;
 239         debug_buf_ptr = debug_buf_addr;
 240         debug_buf_size = gPanicSize - 8;
 241 #else
 242         debug_buf_addr = debug_buf;
 243         debug_buf_ptr = debug_buf;
 244         debug_buf_size = sizeof(debug_buf);
 245 #endif
 246 }
 247
 248 #if defined(__i386__) || defined(__x86_64__)
 249 #define panic_stop()    pmCPUHalt(PM_HALT_PANIC)
 250 #define panic_safe()    pmSafeMode(x86_lcpu(), PM_SAFE_FL_SAFE)
 251 #define panic_normal()  pmSafeMode(x86_lcpu(), PM_SAFE_FL_NORMAL)
 252 #else
 253 #define panic_stop()    { while (1) ; }
 254 #define panic_safe()
 255 #define panic_normal()
 256 #endif
 257
 258 /*
 259  * Prevent CPP from breaking the definition below,
 260  * since all clients get a #define to prepend line numbers
 261  */
 262 #undef panic
 263
 264 void _consume_panic_args(int a __unused, ...)
 265 {
 266     panic("panic");
 267 }
 268
 269 extern unsigned int write_trace_on_panic;
 270
 271 static spl_t
 272 panic_prologue(const char *str)
 273 {
 274         spl_t   s;
 275
 276         if (write_trace_on_panic && kdebug_enable) {
 277                 if (get_preemption_level() == 0 && !ml_at_interrupt_context()) {
 278                         ml_set_interrupts_enabled(TRUE);
 279                         kdbg_dump_trace_to_file("/var/tmp/panic.trace");
 280                 }
 281         }
 282
 283         s = splhigh();
 284         disable_preemption();
 285
 286 #if     defined(__i386__) || defined(__x86_64__)
 287         /* Attempt to display the unparsed panic string */
 288         const char *tstr = str;
 289
 290         kprintf("Panic initiated, string: ");
 291         while (tstr && *tstr)
 292                 kprintf("%c", *tstr++);
 293         kprintf("\n");
 294 #endif
 295
 296         panic_safe();
 297
 298         if( logPanicDataToScreen )
 299                 disable_debug_output = FALSE;
 300
 301         debug_mode = TRUE;
 302
 303 restart:
 304         PANIC_LOCK();
 305
 306         if (panicstr) {
 307                 if (cpu_number() != paniccpu) {
 308                         PANIC_UNLOCK();
 309                         /*
 310                          * Wait until message has been printed to identify correct
 311                          * cpu that made the first panic.
 312                          */
 313                         while (panicwait)
 314                                 continue;
 315                         goto restart;
 316             } else {
 317                         nestedpanic +=1;
 318                         PANIC_UNLOCK();
 319                         Debugger("double panic");
 320                         // a printf statement here was removed to avoid a panic-loop caused
 321                         // by a panic from printf
 322                         panic_stop();
 323                         /* NOTREACHED */
 324                 }
 325         }
 326         panicstr = str;
 327         paniccpu = cpu_number();
 328         panicwait = 1;
 329
 330         PANIC_UNLOCK();
 331         return(s);
 332 }
 333
 334
 335 static void
 336 panic_epilogue(spl_t    s)
 337 {
 338         /*
 339          * Release panicstr so that we can handle normally other panics.
 340          */
 341         PANIC_LOCK();
 342         panicstr = (char *)0;
 343         PANIC_UNLOCK();
 344
 345 #if DEVELOPMENT || DEBUG
 346         if (return_on_panic) {
 347                 panic_normal();
 348                 enable_preemption();
 349                 splx(s);
 350                 return;
 351         }
 352 #else
 353         (void)s;
 354 #endif
 355         kdb_printf("panic: We are hanging here...\n");
 356         panic_stop();
 357         /* NOTREACHED */
 358 }
 359
 360 void
 361 panic(const char *str, ...)
 362 {
 363         va_list listp;
 364         spl_t   s;
 365         boolean_t       old_doprnt_hide_pointers = doprnt_hide_pointers;
 366
 367
 368         /* panic_caller is initialized to 0.  If set, don't change it */
 369         if ( ! panic_caller )
 370                 panic_caller = (unsigned long)(char *)__builtin_return_address(0);
 371
 372         s = panic_prologue(str);
 373
 374         /* Never hide pointers from panic logs. */
 375         doprnt_hide_pointers = FALSE;
 376
 377         kdb_printf("panic(cpu %d caller 0x%lx): ", (unsigned) paniccpu, panic_caller);
 378         if (str) {
 379                 va_start(listp, str);
 380                 _doprnt(str, &listp, consdebug_putc, 0);
 381                 va_end(listp);
 382         }
 383         kdb_printf("\n");
 384
 385         /*
 386          * Release panicwait indicator so that other cpus may call Debugger().
 387          */
 388         panicwait = 0;
 389         Debugger("panic");
 390
 391         doprnt_hide_pointers = old_doprnt_hide_pointers;
 392
 393         panic_epilogue(s);
 394 }
 395
 396 void
 397 panic_context(unsigned int reason, void *ctx, const char *str, ...)
 398 {
 399         va_list listp;
 400         spl_t   s;
 401
 402
 403         /* panic_caller is initialized to 0.  If set, don't change it */
 404         if ( ! panic_caller )
 405                 panic_caller = (unsigned long)(char *)__builtin_return_address(0);
 406
 407         s = panic_prologue(str);
 408         kdb_printf("panic(cpu %d caller 0x%lx): ", (unsigned) paniccpu, panic_caller);
 409         if (str) {
 410                 va_start(listp, str);
 411                 _doprnt(str, &listp, consdebug_putc, 0);
 412                 va_end(listp);
 413         }
 414         kdb_printf("\n");
 415
 416         /*
 417          * Release panicwait indicator so that other cpus may call Debugger().
 418          */
 419         panicwait = 0;
 420         DebuggerWithContext(reason, ctx, "panic");
 421         panic_epilogue(s);
 422 }
 423
 424 void
 425 log(__unused int level, char *fmt, ...)
 426 {
 427         va_list listp;
 428
 429 #ifdef lint
 430         level++;
 431 #endif /* lint */
 432 #ifdef  MACH_BSD
 433         disable_preemption();
 434         va_start(listp, fmt);
 435         _doprnt(fmt, &listp, conslog_putc, 0);
 436         va_end(listp);
 437         enable_preemption();
 438 #endif
 439 }
 440
 441 void
 442 debug_putc(char c)
 443 {
 444         if ((debug_buf_size != 0) &&
 445                 ((debug_buf_ptr-debug_buf_addr) < (int)debug_buf_size)) {
 446                 *debug_buf_ptr=c;
 447                 debug_buf_ptr++;
 448         }
 449 }
 450
 451 /* In-place packing routines -- inefficient, but they're called at most once.
 452  * Assumes "buflen" is a multiple of 8.
 453  */
 454
 455 int packA(char *inbuf, uint32_t length, uint32_t buflen)
 456 {
 457   unsigned int i, j = 0;
 458   pasc_t pack;
 459
 460   length = MIN(((length + 7) & ~7), buflen);
 461
 462   for (i = 0; i < length; i+=8)
 463     {
 464       pack.a = inbuf[i];
 465       pack.b = inbuf[i+1];
 466       pack.c = inbuf[i+2];
 467       pack.d = inbuf[i+3];
 468       pack.e = inbuf[i+4];
 469       pack.f = inbuf[i+5];
 470       pack.g = inbuf[i+6];
 471       pack.h = inbuf[i+7];
 472       bcopy ((char *) &pack, inbuf + j, 7);
 473       j += 7;
 474     }
 475   return j;
 476 }
 477
 478 void unpackA(char *inbuf, uint32_t length)
 479 {
 480         pasc_t packs;
 481         unsigned i = 0;
 482         length = (length * 8)/7;
 483
 484         while (i < length) {
 485           packs = *(pasc_t *)&inbuf[i];
 486           bcopy(&inbuf[i+7], &inbuf[i+8], MAX(0, (int) (length - i - 8)));
 487           inbuf[i++] = packs.a;
 488           inbuf[i++] = packs.b;
 489           inbuf[i++] = packs.c;
 490           inbuf[i++] = packs.d;
 491           inbuf[i++] = packs.e;
 492           inbuf[i++] = packs.f;
 493           inbuf[i++] = packs.g;
 494           inbuf[i++] = packs.h;
 495         }
 496 }
 497
 498 extern void *proc_name_address(void *p);
 499
 500 static void
 501 panic_display_process_name(void) {
 502         /* because of scoping issues len(p_comm) from proc_t is hard coded here */
 503         char proc_name[17] = "Unknown";
 504         task_t ctask = 0;
 505         void *cbsd_info = 0;
 506
 507         if (ml_nofault_copy((vm_offset_t)&current_thread()->task, (vm_offset_t) &ctask, sizeof(task_t)) == sizeof(task_t))
 508                 if(ml_nofault_copy((vm_offset_t)&ctask->bsd_info, (vm_offset_t)&cbsd_info, sizeof(cbsd_info)) == sizeof(cbsd_info))
 509                         if (cbsd_info && (ml_nofault_copy((vm_offset_t) proc_name_address(cbsd_info), (vm_offset_t) &proc_name, sizeof(proc_name)) > 0))
 510                                 proc_name[sizeof(proc_name) - 1] = '\0';
 511         kdb_printf("\nBSD process name corresponding to current thread: %s\n", proc_name);
 512 }
 513
 514 unsigned        panic_active(void) {
 515         return ((panicstr != (char *) 0));
 516 }
 517
 518 void populate_model_name(char *model_string) {
 519         strlcpy(model_name, model_string, sizeof(model_name));
 520 }
 521
 522 void panic_display_model_name(void) {
 523         char tmp_model_name[sizeof(model_name)];
 524
 525         if (ml_nofault_copy((vm_offset_t) &model_name, (vm_offset_t) &tmp_model_name, sizeof(model_name)) != sizeof(model_name))
 526                 return;
 527
 528         tmp_model_name[sizeof(tmp_model_name) - 1] = '\0';
 529
 530         if (tmp_model_name[0] != 0)
 531                 kdb_printf("System model name: %s\n", tmp_model_name);
 532 }
 533
 534 void panic_display_kernel_uuid(void) {
 535         char tmp_kernel_uuid[sizeof(kernel_uuid_string)];
 536
 537         if (ml_nofault_copy((vm_offset_t) &kernel_uuid_string, (vm_offset_t) &tmp_kernel_uuid, sizeof(kernel_uuid_string)) != sizeof(kernel_uuid_string))
 538                 return;
 539
 540         if (tmp_kernel_uuid[0] != '\0')
 541                 kdb_printf("Kernel UUID: %s\n", tmp_kernel_uuid);
 542 }
 543
 544 void panic_display_kernel_aslr(void) {
 545         if (vm_kernel_slide) {
 546                 kdb_printf("Kernel slide:     0x%016lx\n", (unsigned long) vm_kernel_slide);
 547                 kdb_printf("Kernel text base: %p\n", (void *) vm_kernel_stext);
 548         }
 549 }
 550
 551 void panic_display_hibb(void) {
 552 #if defined(__i386__) || defined (__x86_64__)
 553         kdb_printf("__HIB  text base: %p\n", (void *) vm_hib_base);
 554 #endif
 555 }
 556
 557 static void panic_display_uptime(void) {
 558         uint64_t        uptime;
 559         absolutetime_to_nanoseconds(mach_absolute_time(), &uptime);
 560
 561         kdb_printf("\nSystem uptime in nanoseconds: %llu\n", uptime);
 562 }
 563
 564 extern const char version[];
 565 extern char osversion[];
 566
 567 static volatile uint32_t config_displayed = 0;
 568
 569 __private_extern__ void panic_display_system_configuration(void) {
 570
 571         panic_display_process_name();
 572         if (OSCompareAndSwap(0, 1, &config_displayed)) {
 573                 char buf[256];
 574                 if (strlcpy(buf, PE_boot_args(), sizeof(buf)))
 575                         kdb_printf("Boot args: %s\n", buf);
 576                 kdb_printf("\nMac OS version:\n%s\n",
 577                     (osversion[0] != 0) ? osversion : "Not yet set");
 578                 kdb_printf("\nKernel version:\n%s\n",version);
 579                 panic_display_kernel_uuid();
 580                 panic_display_kernel_aslr();
 581                 panic_display_hibb();
 582                 panic_display_pal_info();
 583                 panic_display_model_name();
 584                 panic_display_uptime();
 585                 panic_display_zprint();
 586 #if CONFIG_ZLEAKS
 587                 panic_display_ztrace();
 588 #endif /* CONFIG_ZLEAKS */
 589                 kext_dump_panic_lists(&kdb_log);
 590         }
 591 }
 592
 593 extern zone_t           first_zone;
 594 extern unsigned int     num_zones, stack_total;
 595 extern unsigned long long stack_allocs;
 596
 597 #if defined(__i386__) || defined (__x86_64__)
 598 extern unsigned int     inuse_ptepages_count;
 599 extern long long alloc_ptepages_count;
 600 #endif
 601
 602 extern boolean_t        panic_include_zprint;
 603 extern vm_offset_t      panic_kext_memory_info;
 604 extern vm_size_t        panic_kext_memory_size;
 605
 606 __private_extern__ void panic_display_zprint()
 607 {
 608         if(panic_include_zprint == TRUE) {
 609
 610                 unsigned int    i;
 611                 struct zone     zone_copy;
 612
 613                 kdb_printf("%-20s %10s %10s\n", "Zone Name", "Cur Size", "Free Size");
 614                 if(first_zone!=NULL) {
 615                         if(ml_nofault_copy((vm_offset_t)first_zone, (vm_offset_t)&zone_copy, sizeof(struct zone)) == sizeof(struct zone)) {
 616                                 for (i = 0; i < num_zones; i++) {
 617                                         if(zone_copy.cur_size > (1024*1024)) {
 618                                                 kdb_printf("%-20s %10lu %10lu\n",zone_copy.zone_name, (uintptr_t)zone_copy.cur_size,(uintptr_t)(zone_copy.countfree * zone_copy.elem_size));
 619                                         }
 620
 621                                         if(zone_copy.next_zone == NULL) {
 622                                                 break;
 623                                         }
 624
 625                                         if(ml_nofault_copy((vm_offset_t)zone_copy.next_zone, (vm_offset_t)&zone_copy, sizeof(struct zone)) != sizeof(struct zone)) {
 626                                                 break;
 627                                         }
 628                                 }
 629                         }
 630                 }
 631
 632                 kdb_printf("%-20s %10lu\n", "Kernel Stacks", (uintptr_t)(kernel_stack_size * stack_total));
 633
 634 #if defined(__i386__) || defined (__x86_64__)
 635                 kdb_printf("%-20s %10lu\n", "PageTables",(uintptr_t)(PAGE_SIZE * inuse_ptepages_count));
 636 #endif
 637
 638                 kdb_printf("%-20s %10lu\n", "Kalloc.Large", (uintptr_t)kalloc_large_total);
 639                 if (panic_kext_memory_info) {
 640                         mach_memory_info_t *mem_info = (mach_memory_info_t *)panic_kext_memory_info;
 641                         kdb_printf("\n%-5s %10s\n", "Kmod", "Size");
 642                         for (i = 0; i < VM_KERN_MEMORY_COUNT + VM_KERN_COUNTER_COUNT; i++) {
 643                                 if (((mem_info[i].flags & VM_KERN_SITE_TYPE) == VM_KERN_SITE_KMOD) && (mem_info[i].size > (1024 * 1024))) {
 644                                         kdb_printf("%-5lld %10lld\n", mem_info[i].site, mem_info[i].size);
 645                                 }
 646                         }
 647                 }
 648         }
 649 }
 650
 651 #if CONFIG_ECC_LOGGING
 652 __private_extern__ void panic_display_ecc_errors()
 653 {
 654         uint32_t count = ecc_log_get_correction_count();
 655
 656         if (count > 0) {
 657                 kdb_printf("ECC Corrections:%u\n", count);
 658         }
 659 }
 660 #endif /* CONFIG_ECC_LOGGING */
 661
 662 #if CONFIG_ZLEAKS
 663 extern boolean_t        panic_include_ztrace;
 664 extern struct ztrace* top_ztrace;
 665 void panic_print_symbol_name(vm_address_t search);
 666
 667 /*
 668  * Prints the backtrace most suspected of being a leaker, if we paniced in the zone allocator.
 669  * top_ztrace and panic_include_ztrace comes from osfmk/kern/zalloc.c
 670  */
 671 __private_extern__ void panic_display_ztrace(void)
 672 {
 673         if(panic_include_ztrace == TRUE) {
 674                 unsigned int i = 0;
 675                 boolean_t keepsyms = FALSE;
 676
 677                 PE_parse_boot_argn("keepsyms", &keepsyms, sizeof (keepsyms));
 678                 struct ztrace top_ztrace_copy;
 679
 680                 /* Make sure not to trip another panic if there's something wrong with memory */
 681                 if(ml_nofault_copy((vm_offset_t)top_ztrace, (vm_offset_t)&top_ztrace_copy, sizeof(struct ztrace)) == sizeof(struct ztrace)) {
 682                         kdb_printf("\nBacktrace suspected of leaking: (outstanding bytes: %lu)\n", (uintptr_t)top_ztrace_copy.zt_size);
 683                         /* Print the backtrace addresses */
 684                         for (i = 0; (i < top_ztrace_copy.zt_depth && i < MAX_ZTRACE_DEPTH) ; i++) {
 685                                 kdb_printf("%p ", top_ztrace_copy.zt_stack[i]);
 686                                 if (keepsyms) {
 687                                         panic_print_symbol_name((vm_address_t)top_ztrace_copy.zt_stack[i]);
 688                                 }
 689                                 kdb_printf("\n");
 690                         }
 691                         /* Print any kexts in that backtrace, along with their link addresses so we can properly blame them */
 692                         kmod_panic_dump((vm_offset_t *)&top_ztrace_copy.zt_stack[0], top_ztrace_copy.zt_depth);
 693                 }
 694                 else {
 695                         kdb_printf("\nCan't access top_ztrace...\n");
 696                 }
 697                 kdb_printf("\n");
 698         }
 699 }
 700 #endif /* CONFIG_ZLEAKS */
 701
 702 #if ! (MACH_KDP && CONFIG_KDP_INTERACTIVE_DEBUGGING)
 703 static struct kdp_ether_addr kdp_current_mac_address = {{0, 0, 0, 0, 0, 0}};
 704
 705 /* XXX ugly forward declares to stop warnings */
 706 void *kdp_get_interface(void);
 707 void kdp_set_ip_and_mac_addresses(struct kdp_in_addr *, struct kdp_ether_addr *);
 708 void kdp_set_gateway_mac(void *);
 709 void kdp_set_interface(void *);
 710 void kdp_register_send_receive(void *, void *);
 711 void kdp_unregister_send_receive(void *, void *);
 712 void kdp_snapshot_preflight(int, void *, uint32_t, uint32_t, kcdata_descriptor_t, boolean_t enable_faulting);
 713 int kdp_stack_snapshot_geterror(void);
 714 uint32_t kdp_stack_snapshot_bytes_traced(void);
 715
 716 void *
 717 kdp_get_interface( void)
 718 {
 719         return(void *)0;
 720 }
 721
 722 unsigned int
 723 kdp_get_ip_address(void )
 724 { return 0; }
 725
 726 struct kdp_ether_addr
 727 kdp_get_mac_addr(void)
 728 {
 729         return kdp_current_mac_address;
 730 }
 731
 732 void
 733 kdp_set_ip_and_mac_addresses(
 734         __unused struct kdp_in_addr          *ipaddr,
 735         __unused struct kdp_ether_addr       *macaddr)
 736 {}
 737
 738 void
 739 kdp_set_gateway_mac(__unused void *gatewaymac)
 740 {}
 741
 742 void
 743 kdp_set_interface(__unused void *ifp)
 744 {}
 745
 746 void
 747 kdp_register_send_receive(__unused void *send, __unused void *receive)
 748 {}
 749
 750 void
 751 kdp_unregister_send_receive(__unused void *send, __unused void *receive)
 752 {}
 753
 754 void kdp_register_link(__unused kdp_link_t link, __unused kdp_mode_t mode)
 755 {}
 756
 757 void kdp_unregister_link(__unused kdp_link_t link, __unused kdp_mode_t mode)
 758 {}
 759
 760 #endif
 761
 762 #if !CONFIG_TELEMETRY
 763 int telemetry_gather(user_addr_t buffer __unused, uint32_t *length __unused, boolean_t mark __unused)
 764 {
 765         return KERN_NOT_SUPPORTED;
 766 }
 767 #endif