]> git.saurik.com Git - apple/xnu.git/blobdiff - osfmk/kern/debug.c
xnu-3247.1.106.tar.gz
[apple/xnu.git] / osfmk / kern / debug.c
index c5f6cf3d967ea8395394787c74b3cc69481a72ef..2c79aacdf7eeb9f012676b4b9829a6e15fdfbaf1 100644 (file)
@@ -1,23 +1,29 @@
 /*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2013 Apple Inc. All rights reserved.
  *
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
  * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
  * 
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 /*
  * @OSF_COPYRIGHT@
  */
 
 #include <mach_assert.h>
-#include <mach_kdb.h>
-#include <mach_kgdb.h>
 #include <mach_kdp.h>
 
 #include <kern/cpu_number.h>
-#include <kern/lock.h>
+#include <kern/kalloc.h>
 #include <kern/spl.h>
 #include <kern/thread.h>
 #include <kern/assert.h>
 #include <kern/sched_prim.h>
 #include <kern/misc_protos.h>
+#include <kern/clock.h>
+#include <kern/telemetry.h>
+#include <kern/ecc.h>
+#include <kern/kern_cdata.h>
 #include <vm/vm_kern.h>
 #include <vm/pmap.h>
 #include <stdarg.h>
+#if !(MACH_KDP && CONFIG_KDP_INTERACTIVE_DEBUGGING)
+#include <kdp/kdp_udp.h>
+#endif
 
-#ifdef __ppc__
-#include <ppc/Firmware.h>
-#include <ppc/low_trace.h>
+#if defined(__i386__) || defined(__x86_64__)
+#include <i386/cpu_threads.h>
+#include <i386/pmCPU.h>
+#endif
+
+#include <IOKit/IOPlatformExpert.h>
+#include <machine/pal_routines.h>
+
+#include <sys/kdebug.h>
+#include <libkern/OSKextLibPrivate.h>
+#include <libkern/OSAtomic.h>
+#include <libkern/kernel_mach_header.h>
+#include <uuid/uuid.h>
+#include <mach_debug/zone_info.h>
+
+#if (defined(__arm64__) || defined(NAND_PANIC_DEVICE)) && !defined(LEGACY_PANIC_LOGS)
+#include <pexpert/pexpert.h> /* For gPanicBase */
 #endif
 
 unsigned int   halt_in_debugger = 0;
@@ -74,10 +99,11 @@ unsigned int        switch_debugger = 0;
 unsigned int   current_debugger = 0;
 unsigned int   active_debugger = 0;
 unsigned int   debug_mode=0;
-unsigned int   disableDebugOuput = TRUE;
+unsigned int   disable_debug_output = TRUE;
 unsigned int   systemLogDiags = FALSE;
-unsigned int    logPanicDataToScreen = FALSE;
 unsigned int   panicDebugging = FALSE;
+unsigned int   logPanicDataToScreen = FALSE;
+unsigned int   kdebug_serial = FALSE;
 
 int mach_assert = 1;
 
@@ -90,22 +116,73 @@ unsigned int               panic_is_inited = 0;
 unsigned int           return_on_panic = 0;
 unsigned long          panic_caller;
 
-char *debug_buf;
-ppnum_t debug_buf_page;
-char *debug_buf_ptr;
+#define DEBUG_BUF_SIZE (3 * PAGE_SIZE)
+
+/* debug_buf is directly linked with iBoot panic region for ARM64 targets */
+#if (defined(__arm64__) || defined(NAND_PANIC_DEVICE)) && !defined(LEGACY_PANIC_LOGS)
+char *debug_buf_addr = NULL;
+char *debug_buf_ptr = NULL;
 unsigned int debug_buf_size = 0;
+#else
+char debug_buf[DEBUG_BUF_SIZE];
+__used char *debug_buf_addr = debug_buf;
+char *debug_buf_ptr = debug_buf;
+unsigned int debug_buf_size = sizeof(debug_buf);
+#endif
 
-void
+static char model_name[64];
+unsigned char *kernel_uuid;
+/* uuid_string_t */ char kernel_uuid_string[37];
+
+static spl_t panic_prologue(const char *str);
+static void panic_epilogue(spl_t s);
+
+struct pasc {
+  unsigned a: 7;
+  unsigned b: 7;
+  unsigned c: 7;
+  unsigned d: 7;
+  unsigned e: 7;
+  unsigned f: 7;
+  unsigned g: 7;
+  unsigned h: 7;
+}  __attribute__((packed));
+
+typedef struct pasc pasc_t;
+
+/* Prevent CPP from breaking the definition below */
+#if CONFIG_NO_PANIC_STRINGS
+#undef Assert
+#endif
+
+void __attribute__((noinline))
 Assert(
        const char      *file,
        int             line,
-       const char      *expression)
+       const char      *expression
+      )
 {
+       int saved_return_on_panic;
+
        if (!mach_assert) {
+               kprintf("%s:%d non-fatal Assertion: %s", file, line, expression);
                return;
        }
-       panic("{%d} Assertion failed: file \"%s\", line %d: %s\n", 
-              cpu_number(), file, line, expression);
+
+       saved_return_on_panic = return_on_panic;
+
+       /*
+        * If we don't have a debugger configured, returning from an
+        * assert is a bad, bad idea; there is no guarantee that we
+        * didn't simply assert before we were able to restart the
+        * platform.
+        */
+       if (current_debugger != NO_CUR_DB)
+               return_on_panic = 1;
+
+       panic_plain("%s:%d Assertion failed: %s", file, line, expression);
+
+       return_on_panic = saved_return_on_panic;
 }
 
 /*
@@ -126,45 +203,106 @@ MACRO_BEGIN                                                              \
                simple_unlock(&panic_lock);                             \
 MACRO_END
 
-
 void
 panic_init(void)
 {
+       unsigned long uuidlen = 0;
+       void *uuid;
+
+       uuid = getuuidfromheader(&_mh_execute_header, &uuidlen);
+       if ((uuid != NULL) && (uuidlen == sizeof(uuid_t))) {
+               kernel_uuid = uuid;
+               uuid_unparse_upper(*(uuid_t *)uuid, kernel_uuid_string);
+       }
+
        simple_lock_init(&panic_lock, 0);
        panic_is_inited = 1;
        panic_caller = 0;
+
+       if (!PE_parse_boot_argn("assertions", &mach_assert, sizeof(mach_assert))) {
+               mach_assert = 1;
+       }
 }
 
 void
-panic(const char *str, ...)
+debug_log_init(void)
+{
+       if (debug_buf_size != 0)
+               return;
+#if (defined(__arm64__) || defined(NAND_PANIC_DEVICE)) && !defined(LEGACY_PANIC_LOGS)
+       if (!gPanicBase) {
+               printf("debug_log_init: Error!! gPanicBase is still not initialized\n");
+               return;
+       }
+       /* Shift debug buf start location and size by 8 bytes for magic header and crc value */
+       debug_buf_addr = (char*)gPanicBase + 8;
+       debug_buf_ptr = debug_buf_addr;
+       debug_buf_size = gPanicSize - 8;
+#else
+       debug_buf_addr = debug_buf;
+       debug_buf_ptr = debug_buf;
+       debug_buf_size = sizeof(debug_buf);
+#endif
+}
+
+#if defined(__i386__) || defined(__x86_64__)
+#define panic_stop()   pmCPUHalt(PM_HALT_PANIC)
+#define panic_safe()   pmSafeMode(x86_lcpu(), PM_SAFE_FL_SAFE)
+#define panic_normal() pmSafeMode(x86_lcpu(), PM_SAFE_FL_NORMAL)
+#else
+#define panic_stop()   { while (1) ; }
+#define panic_safe()
+#define panic_normal()
+#endif
+
+/*
+ * Prevent CPP from breaking the definition below,
+ * since all clients get a #define to prepend line numbers
+ */
+#undef panic
+
+void _consume_panic_args(int a __unused, ...)
+{
+    panic("panic");
+}
+
+extern unsigned int write_trace_on_panic;
+
+static spl_t
+panic_prologue(const char *str)
 {
-       va_list listp;
        spl_t   s;
-       thread_t thread;
-       wait_queue_t wq;
+
+       if (write_trace_on_panic && kdebug_enable) {
+               if (get_preemption_level() == 0 && !ml_at_interrupt_context()) {
+                       ml_set_interrupts_enabled(TRUE);
+                       kdbg_dump_trace_to_file("/var/tmp/panic.trace");
+               }
+       }
 
        s = splhigh();
        disable_preemption();
 
-#ifdef __ppc__
-       lastTrace = LLTraceSet(0);              /* Disable low-level tracing */
+#if    defined(__i386__) || defined(__x86_64__)
+       /* Attempt to display the unparsed panic string */
+       const char *tstr = str;
+
+       kprintf("Panic initiated, string: ");
+       while (tstr && *tstr)
+               kprintf("%c", *tstr++);
+       kprintf("\n");
 #endif
 
-       thread = current_thread();              /* Get failing thread */
-       wq = thread->wait_queue;                /* Save the old value */
-       thread->wait_queue = 0;                 /* Clear the wait so we do not get double panics when we try locks */
+       panic_safe();
 
        if( logPanicDataToScreen )
-               disableDebugOuput = FALSE;
+               disable_debug_output = FALSE;
                
        debug_mode = TRUE;
 
-       /* panic_caller is initialized to 0.  If set, don't change it */
-       if ( ! panic_caller )
-               panic_caller = (unsigned long) __builtin_return_address(0);
-       
 restart:
        PANIC_LOCK();
+
        if (panicstr) {
                if (cpu_number() != paniccpu) {
                        PANIC_UNLOCK();
@@ -180,7 +318,7 @@ restart:
                        PANIC_UNLOCK();
                        Debugger("double panic");
                        printf("double panic:  We are hanging here...\n");
-                       while(1);
+                       panic_stop();
                        /* NOTREACHED */
                }
        }
@@ -189,36 +327,97 @@ restart:
        panicwait = 1;
 
        PANIC_UNLOCK();
-       kdb_printf("panic(cpu %d caller 0x%08X): ", (unsigned) paniccpu, panic_caller);
-       va_start(listp, str);
-       _doprnt(str, &listp, consdebug_putc, 0);
-       va_end(listp);
-       kdb_printf("\n");
+       return(s);
+}
 
-       /*
-        * Release panicwait indicator so that other cpus may call Debugger().
-        */
-       panicwait = 0;
-       Debugger("panic");
+
+static void
+panic_epilogue(spl_t   s)
+{
        /*
         * Release panicstr so that we can handle normally other panics.
         */
        PANIC_LOCK();
        panicstr = (char *)0;
        PANIC_UNLOCK();
-       thread->wait_queue = wq;        /* Restore the wait queue */
+
        if (return_on_panic) {
+               panic_normal();
                enable_preemption();
                splx(s);
                return;
        }
        kdb_printf("panic: We are hanging here...\n");
-       while(1);
+       panic_stop();
        /* NOTREACHED */
 }
 
 void
-log(int level, char *fmt, ...)
+panic(const char *str, ...)
+{
+       va_list listp;
+       spl_t   s;
+       boolean_t       old_doprnt_hide_pointers = doprnt_hide_pointers;
+
+
+       /* panic_caller is initialized to 0.  If set, don't change it */
+       if ( ! panic_caller )
+               panic_caller = (unsigned long)(char *)__builtin_return_address(0);
+       
+       s = panic_prologue(str);
+
+       /* Never hide pointers from panic logs. */
+       doprnt_hide_pointers = FALSE;
+
+       kdb_printf("panic(cpu %d caller 0x%lx): ", (unsigned) paniccpu, panic_caller);
+       if (str) {
+               va_start(listp, str);
+               _doprnt(str, &listp, consdebug_putc, 0);
+               va_end(listp);
+       }
+       kdb_printf("\n");
+
+       /*
+        * Release panicwait indicator so that other cpus may call Debugger().
+        */
+       panicwait = 0;
+       Debugger("panic");
+
+       doprnt_hide_pointers = old_doprnt_hide_pointers;
+
+       panic_epilogue(s);
+}
+
+void
+panic_context(unsigned int reason, void *ctx, const char *str, ...)
+{
+       va_list listp;
+       spl_t   s;
+
+
+       /* panic_caller is initialized to 0.  If set, don't change it */
+       if ( ! panic_caller )
+               panic_caller = (unsigned long)(char *)__builtin_return_address(0);
+       
+       s = panic_prologue(str);
+       kdb_printf("panic(cpu %d caller 0x%lx): ", (unsigned) paniccpu, panic_caller);
+       if (str) {
+               va_start(listp, str);
+               _doprnt(str, &listp, consdebug_putc, 0);
+               va_end(listp);
+       }
+       kdb_printf("\n");
+
+       /*
+        * Release panicwait indicator so that other cpus may call Debugger().
+        */
+       panicwait = 0;
+       DebuggerWithContext(reason, ctx, "panic");
+       panic_epilogue(s);
+}
+
+void
+log(__unused int level, char *fmt, ...)
 {
        va_list listp;
 
@@ -235,22 +434,329 @@ log(int level, char *fmt, ...)
 }
 
 void
-debug_log_init(void)
+debug_putc(char c)
 {
-       if (debug_buf_size != 0)
+       if ((debug_buf_size != 0) &&
+               ((debug_buf_ptr-debug_buf_addr) < (int)debug_buf_size)) {
+               *debug_buf_ptr=c;
+               debug_buf_ptr++;
+       }
+}
+
+/* In-place packing routines -- inefficient, but they're called at most once.
+ * Assumes "buflen" is a multiple of 8.
+ */
+
+int packA(char *inbuf, uint32_t length, uint32_t buflen)
+{
+  unsigned int i, j = 0;
+  pasc_t pack;
+  
+  length = MIN(((length + 7) & ~7), buflen);
+
+  for (i = 0; i < length; i+=8)
+    {
+      pack.a = inbuf[i];
+      pack.b = inbuf[i+1];
+      pack.c = inbuf[i+2];
+      pack.d = inbuf[i+3];
+      pack.e = inbuf[i+4];
+      pack.f = inbuf[i+5];
+      pack.g = inbuf[i+6];
+      pack.h = inbuf[i+7];
+      bcopy ((char *) &pack, inbuf + j, 7);
+      j += 7;
+    }
+  return j;
+}
+
+void unpackA(char *inbuf, uint32_t length)
+{
+       pasc_t packs;
+       unsigned i = 0;
+       length = (length * 8)/7;
+
+       while (i < length) {
+         packs = *(pasc_t *)&inbuf[i];
+         bcopy(&inbuf[i+7], &inbuf[i+8], MAX(0, (int) (length - i - 8)));
+         inbuf[i++] = packs.a;
+         inbuf[i++] = packs.b;
+         inbuf[i++] = packs.c;
+         inbuf[i++] = packs.d;
+         inbuf[i++] = packs.e;
+         inbuf[i++] = packs.f;
+         inbuf[i++] = packs.g;
+         inbuf[i++] = packs.h;
+       }
+}
+
+extern void *proc_name_address(void *p);
+
+static void
+panic_display_process_name(void) {
+       /* because of scoping issues len(p_comm) from proc_t is hard coded here */
+       char proc_name[17] = "Unknown";
+       task_t ctask = 0;
+       void *cbsd_info = 0;
+
+       if (ml_nofault_copy((vm_offset_t)&current_thread()->task, (vm_offset_t) &ctask, sizeof(task_t)) == sizeof(task_t))
+               if(ml_nofault_copy((vm_offset_t)&ctask->bsd_info, (vm_offset_t)&cbsd_info, sizeof(cbsd_info)) == sizeof(cbsd_info))
+                       if (cbsd_info && (ml_nofault_copy((vm_offset_t) proc_name_address(cbsd_info), (vm_offset_t) &proc_name, sizeof(proc_name)) > 0))
+                               proc_name[sizeof(proc_name) - 1] = '\0';
+       kdb_printf("\nBSD process name corresponding to current thread: %s\n", proc_name);
+}
+
+unsigned       panic_active(void) {
+       return ((panicstr != (char *) 0));
+}
+
+void populate_model_name(char *model_string) {
+       strlcpy(model_name, model_string, sizeof(model_name));
+}
+
+void panic_display_model_name(void) {
+       char tmp_model_name[sizeof(model_name)];
+
+       if (ml_nofault_copy((vm_offset_t) &model_name, (vm_offset_t) &tmp_model_name, sizeof(model_name)) != sizeof(model_name))
                return;
-       if (kmem_alloc(kernel_map, (vm_offset_t *) &debug_buf, PAGE_SIZE) != KERN_SUCCESS)
-               panic("cannot allocate debug_buf \n");
-       debug_buf_ptr = debug_buf;
-       debug_buf_size = PAGE_SIZE;
-        debug_buf_page = pmap_find_phys(kernel_pmap, (addr64_t)(uintptr_t)debug_buf_ptr);
+
+       tmp_model_name[sizeof(tmp_model_name) - 1] = '\0';
+
+       if (tmp_model_name[0] != 0)
+               kdb_printf("System model name: %s\n", tmp_model_name);
 }
 
-void
-debug_putc(char c)
+void panic_display_kernel_uuid(void) {
+       char tmp_kernel_uuid[sizeof(kernel_uuid_string)];
+
+       if (ml_nofault_copy((vm_offset_t) &kernel_uuid_string, (vm_offset_t) &tmp_kernel_uuid, sizeof(kernel_uuid_string)) != sizeof(kernel_uuid_string))
+               return;
+
+       if (tmp_kernel_uuid[0] != '\0')
+               kdb_printf("Kernel UUID: %s\n", tmp_kernel_uuid);
+}
+
+void panic_display_kernel_aslr(void) {
+       if (vm_kernel_slide) {
+               kdb_printf("Kernel slide:     0x%016lx\n", (unsigned long) vm_kernel_slide);
+               kdb_printf("Kernel text base: %p\n", (void *) vm_kernel_stext);
+       }
+}
+
+void panic_display_hibb(void) {
+#if defined(__i386__) || defined (__x86_64__)
+       kdb_printf("__HIB  text base: %p\n", (void *) vm_hib_base);
+#endif
+}
+
+static void panic_display_uptime(void) {
+       uint64_t        uptime;
+       absolutetime_to_nanoseconds(mach_absolute_time(), &uptime);
+
+       kdb_printf("\nSystem uptime in nanoseconds: %llu\n", uptime);
+}
+
+extern const char version[];
+extern char osversion[];
+
+static volatile uint32_t config_displayed = 0;
+
+__private_extern__ void panic_display_system_configuration(void) {
+
+       panic_display_process_name();
+       if (OSCompareAndSwap(0, 1, &config_displayed)) {
+               char buf[256];
+               if (strlcpy(buf, PE_boot_args(), sizeof(buf)))
+                       kdb_printf("Boot args: %s\n", buf);
+               kdb_printf("\nMac OS version:\n%s\n",
+                   (osversion[0] != 0) ? osversion : "Not yet set");
+               kdb_printf("\nKernel version:\n%s\n",version);
+               panic_display_kernel_uuid();
+               panic_display_kernel_aslr();
+               panic_display_hibb();
+               panic_display_pal_info();
+               panic_display_model_name();
+               panic_display_uptime();
+               panic_display_zprint();
+#if CONFIG_ZLEAKS
+               panic_display_ztrace();
+#endif /* CONFIG_ZLEAKS */
+               kext_dump_panic_lists(&kdb_log);
+       }
+}
+
+extern zone_t          first_zone;
+extern unsigned int    num_zones, stack_total;
+extern unsigned long long stack_allocs;
+
+#if defined(__i386__) || defined (__x86_64__)
+extern unsigned int    inuse_ptepages_count;
+extern long long alloc_ptepages_count;
+#endif
+
+extern boolean_t       panic_include_zprint;
+extern vm_offset_t     panic_kext_memory_info;
+extern vm_size_t       panic_kext_memory_size;
+
+__private_extern__ void panic_display_zprint()
 {
-       if ((debug_buf_size != 0) && ((debug_buf_ptr-debug_buf) < debug_buf_size)) {
-               *debug_buf_ptr=c;
-               debug_buf_ptr++;
+       if(panic_include_zprint == TRUE) {
+
+               unsigned int    i;
+               struct zone     zone_copy;
+
+               kdb_printf("%-20s %10s %10s\n", "Zone Name", "Cur Size", "Free Size");
+               if(first_zone!=NULL) {
+                       if(ml_nofault_copy((vm_offset_t)first_zone, (vm_offset_t)&zone_copy, sizeof(struct zone)) == sizeof(struct zone)) {
+                               for (i = 0; i < num_zones; i++) {
+                                       if(zone_copy.cur_size > (1024*1024)) {
+                                               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));
+                                       }       
+                                       
+                                       if(zone_copy.next_zone == NULL) {
+                                               break;
+                                       }
+
+                                       if(ml_nofault_copy((vm_offset_t)zone_copy.next_zone, (vm_offset_t)&zone_copy, sizeof(struct zone)) != sizeof(struct zone)) {
+                                               break;
+                                       }
+                               }
+                       }
+               }
+
+               kdb_printf("%-20s %10lu\n", "Kernel Stacks", (uintptr_t)(kernel_stack_size * stack_total));
+
+#if defined(__i386__) || defined (__x86_64__)
+               kdb_printf("%-20s %10lu\n", "PageTables",(uintptr_t)(PAGE_SIZE * inuse_ptepages_count));
+#endif
+
+               kdb_printf("%-20s %10lu\n", "Kalloc.Large", (uintptr_t)kalloc_large_total);
+               if (panic_kext_memory_info) {
+                       mach_memory_info_t *mem_info = (mach_memory_info_t *)panic_kext_memory_info;
+                       kdb_printf("\n%-5s %10s\n", "Kmod", "Size");
+                       for (i = 0; i < VM_KERN_MEMORY_COUNT + VM_KERN_COUNTER_COUNT; i++) {
+                               if (((mem_info[i].flags & VM_KERN_SITE_TYPE) == VM_KERN_SITE_KMOD) && (mem_info[i].size > (1024 * 1024))) {
+                                       kdb_printf("%-5lld %10lld\n", mem_info[i].site, mem_info[i].size);
+                               }
+                       }
+               }
+       }
+}
+
+#if CONFIG_ECC_LOGGING
+__private_extern__ void panic_display_ecc_errors() 
+{
+       uint32_t count = ecc_log_get_correction_count();
+
+       if (count > 0) {
+               kdb_printf("ECC Corrections:%u\n", count);
        }
 }
+#endif /* CONFIG_ECC_LOGGING */
+
+#if CONFIG_ZLEAKS
+extern boolean_t       panic_include_ztrace;
+extern struct ztrace* top_ztrace;
+void panic_print_symbol_name(vm_address_t search);
+
+/*
+ * Prints the backtrace most suspected of being a leaker, if we paniced in the zone allocator.
+ * top_ztrace and panic_include_ztrace comes from osfmk/kern/zalloc.c
+ */
+__private_extern__ void panic_display_ztrace(void)
+{
+       if(panic_include_ztrace == TRUE) {
+               unsigned int i = 0;
+               boolean_t keepsyms = FALSE;
+
+               PE_parse_boot_argn("keepsyms", &keepsyms, sizeof (keepsyms));
+               struct ztrace top_ztrace_copy;
+               
+               /* Make sure not to trip another panic if there's something wrong with memory */
+               if(ml_nofault_copy((vm_offset_t)top_ztrace, (vm_offset_t)&top_ztrace_copy, sizeof(struct ztrace)) == sizeof(struct ztrace)) {
+                       kdb_printf("\nBacktrace suspected of leaking: (outstanding bytes: %lu)\n", (uintptr_t)top_ztrace_copy.zt_size);
+                       /* Print the backtrace addresses */
+                       for (i = 0; (i < top_ztrace_copy.zt_depth && i < MAX_ZTRACE_DEPTH) ; i++) {
+                               kdb_printf("%p ", top_ztrace_copy.zt_stack[i]);
+                               if (keepsyms) {
+                                       panic_print_symbol_name((vm_address_t)top_ztrace_copy.zt_stack[i]);
+                               }
+                               kdb_printf("\n");
+                       }
+                       /* Print any kexts in that backtrace, along with their link addresses so we can properly blame them */
+                       kmod_panic_dump((vm_offset_t *)&top_ztrace_copy.zt_stack[0], top_ztrace_copy.zt_depth);
+               }
+               else {
+                       kdb_printf("\nCan't access top_ztrace...\n");
+               }
+               kdb_printf("\n");
+       }
+}
+#endif /* CONFIG_ZLEAKS */
+
+#if ! (MACH_KDP && CONFIG_KDP_INTERACTIVE_DEBUGGING)
+static struct kdp_ether_addr kdp_current_mac_address = {{0, 0, 0, 0, 0, 0}};
+
+/* XXX ugly forward declares to stop warnings */
+void *kdp_get_interface(void);
+void kdp_set_ip_and_mac_addresses(struct kdp_in_addr *, struct kdp_ether_addr *);
+void kdp_set_gateway_mac(void *);
+void kdp_set_interface(void *);
+void kdp_register_send_receive(void *, void *);
+void kdp_unregister_send_receive(void *, void *);
+void kdp_snapshot_preflight(int, void *, uint32_t, uint32_t, kcdata_descriptor_t, boolean_t enable_faulting);
+int kdp_stack_snapshot_geterror(void);
+uint32_t kdp_stack_snapshot_bytes_traced(void);
+
+void *
+kdp_get_interface( void)
+{
+        return(void *)0;
+}
+
+unsigned int
+kdp_get_ip_address(void )
+{ return 0; }
+
+struct kdp_ether_addr
+kdp_get_mac_addr(void)
+{       
+        return kdp_current_mac_address;
+}
+
+void
+kdp_set_ip_and_mac_addresses(   
+        __unused struct kdp_in_addr          *ipaddr,
+        __unused struct kdp_ether_addr       *macaddr)
+{}
+
+void
+kdp_set_gateway_mac(__unused void *gatewaymac)
+{}
+
+void
+kdp_set_interface(__unused void *ifp)
+{}
+
+void
+kdp_register_send_receive(__unused void *send, __unused void *receive)
+{}
+
+void
+kdp_unregister_send_receive(__unused void *send, __unused void *receive)
+{}
+
+void kdp_register_link(__unused kdp_link_t link, __unused kdp_mode_t mode)
+{}
+
+void kdp_unregister_link(__unused kdp_link_t link, __unused kdp_mode_t mode)
+{}
+
+#endif
+
+#if !CONFIG_TELEMETRY
+int telemetry_gather(user_addr_t buffer __unused, uint32_t *length __unused, boolean_t mark __unused)
+{
+       return KERN_NOT_SUPPORTED;
+}
+#endif