xnu-2050.24.15.tar.gz

[apple/xnu.git] / osfmk / kern / debug.c

diff --git a/osfmk/kern/debug.c b/osfmk/kern/debug.c
index f698c52cf454fbe2f3ebe0a5bd4b8b342e4d5c96..b89774897c23216fa7baadc80df1900a0227a8ab 100644 (file)
--- a/osfmk/kern/debug.c
+++ b/osfmk/kern/debug.c
@@ -1,16 +1,19 @@
 /*
 /*

- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2007 Apple Inc. All rights reserved.

  *
  *

- * @APPLE_LICENSE_HEADER_START@
- * 
- * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@

  * 
  * 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
  * 
  * 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. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * 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.
+ * 
+ * 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
  * 
  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER


@@ -20,7 +23,7 @@
  * Please see the License for the specific language governing rights and
  * limitations under the License.
  * 
  * 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@
  */
 /*
  * @OSF_COPYRIGHT@


@@ -52,66 +55,112 @@
  */
 
 #include <mach_assert.h>
  */
 
 #include <mach_assert.h>

-#include <mach_kdb.h>
-#include <mach_kgdb.h>

 #include <mach_kdp.h>
 #include <mach_kdp.h>

-#include <cpus.h>

 
 #include <kern/cpu_number.h>
 
 #include <kern/cpu_number.h>

+#include <kern/kalloc.h>

 #include <kern/lock.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/lock.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 <vm/vm_kern.h>
 #include <vm/vm_kern.h>

+#include <vm/pmap.h>

 #include <stdarg.h>
 #include <stdarg.h>

+#if !MACH_KDP
+#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
 
 #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>
+

 unsigned int   halt_in_debugger = 0;
 unsigned int   switch_debugger = 0;
 unsigned int   current_debugger = 0;
 unsigned int   active_debugger = 0;
 unsigned int   debug_mode=0;
 unsigned int   halt_in_debugger = 0;
 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   panicDebugging = FALSE;
 unsigned int   systemLogDiags = FALSE;
 unsigned int   panicDebugging = FALSE;

-#ifdef __ppc__
-       unsigned int    logPanicDataToScreen = FALSE;
-#else
-       unsigned int    logPanicDataToScreen = TRUE;
-#endif
+unsigned int   logPanicDataToScreen = FALSE;

 
 int mach_assert = 1;
 
 
 int mach_assert = 1;
 

-const char             *panicstr;
+const char             *panicstr = (char *) 0;

 decl_simple_lock_data(,panic_lock)
 int                    paniccpu;
 volatile int           panicwait;
 decl_simple_lock_data(,panic_lock)
 int                    paniccpu;
 volatile int           panicwait;

-volatile int           nestedpanic= 0;
+volatile unsigned int  nestedpanic= 0;

 unsigned int           panic_is_inited = 0;
 unsigned int           return_on_panic = 0;
 unsigned int           panic_is_inited = 0;
 unsigned int           return_on_panic = 0;

-wait_queue_t           save_waits[NCPUS];
+unsigned long          panic_caller;
+
+#if CONFIG_EMBEDDED
+#define DEBUG_BUF_SIZE (PAGE_SIZE)
+#else
+#define DEBUG_BUF_SIZE (3 * PAGE_SIZE)
+#endif
+
+char debug_buf[DEBUG_BUF_SIZE];
+char *debug_buf_ptr = debug_buf;
+unsigned int debug_buf_size = sizeof(debug_buf);
+
+static char model_name[64];
+/* uuid_string_t */ char kernel_uuid[37]; 

 
 

-char *debug_buf;
-char *debug_buf_ptr;
-unsigned int debug_buf_size = 0;
+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
 Assert(
        const char      *file,
        int             line,
 
 void
 Assert(
        const char      *file,
        int             line,

-       const char      *expression)
+       const char      *expression
+      )

 {
 {

+       int saved_return_on_panic;
+

        if (!mach_assert) {
                return;
        }
        if (!mach_assert) {
                return;
        }

-       panic("{%d} Assertion failed: file \"%s\", line %d: %s\n", 
-              cpu_number(), file, line, expression);
+
+       saved_return_on_panic = return_on_panic;
+       return_on_panic = 1;
+
+       panic_plain("%s:%d Assertion failed: %s", file, line, expression);
+
+       return_on_panic = saved_return_on_panic;

 }
 
 /*
 }
 
 /*


@@ -136,35 +185,82 @@ MACRO_END
 void
 panic_init(void)
 {
 void
 panic_init(void)
 {

-       simple_lock_init(&panic_lock, ETAP_NO_TRACE);
+       unsigned long uuidlen = 0;
+       void *uuid;
+
+       uuid = getuuidfromheader(&_mh_execute_header, &uuidlen);
+       if ((uuid != NULL) && (uuidlen == sizeof(uuid_t))) {
+               uuid_unparse_upper(*(uuid_t *)uuid, kernel_uuid);
+       }
+
+       simple_lock_init(&panic_lock, 0);

        panic_is_inited = 1;
        panic_is_inited = 1;

+       panic_caller = 0;

 }
 
 void
 }
 
 void

-panic(const char *str, ...)
+debug_log_init(void)
+{
+       if (debug_buf_size != 0)
+               return;
+       debug_buf_ptr = debug_buf;
+       debug_buf_size = sizeof(debug_buf);
+}
+
+#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");
+}
+
+static spl_t
+panic_prologue(const char *str)

 {
 {

-       va_list listp;

        spl_t   s;
        spl_t   s;

-       thread_t thread;
+
+       if (kdebug_enable) {
+               ml_set_interrupts_enabled(TRUE);
+               kdbg_dump_trace_to_file("/var/tmp/panic.trace");
+       }

 
        s = splhigh();
 
        s = splhigh();

+       disable_preemption();
+
+#if    defined(__i386__) || defined(__x86_64__)
+       /* Attempt to display the unparsed panic string */
+       const char *tstr = str;

 
 

-#ifdef __ppc__
-       lastTrace = LLTraceSet(0);              /* Disable low-level tracing */
+       kprintf("Panic initiated, string: ");
+       while (tstr && *tstr)
+               kprintf("%c", *tstr++);
+       kprintf("\n");

 #endif
 
 #endif
 

-       thread = current_thread();              /* Get failing thread */
-       save_waits[cpu_number()] = 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();

 
 

-       mp_disable_preemption();
-       

        if( logPanicDataToScreen )
        if( logPanicDataToScreen )

-               disableDebugOuput = FALSE;
+               disable_debug_output = FALSE;

                
        debug_mode = TRUE;
                
        debug_mode = TRUE;

+

 restart:
        PANIC_LOCK();
 restart:
        PANIC_LOCK();

+

        if (panicstr) {
                if (cpu_number() != paniccpu) {
                        PANIC_UNLOCK();
        if (panicstr) {
                if (cpu_number() != paniccpu) {
                        PANIC_UNLOCK();


@@ -179,10 +275,8 @@ restart:
                        nestedpanic +=1;
                        PANIC_UNLOCK();
                        Debugger("double panic");
                        nestedpanic +=1;
                        PANIC_UNLOCK();
                        Debugger("double panic");

-                       mp_enable_preemption();
-                       splx(s);

                        printf("double panic:  We are hanging here...\n");
                        printf("double panic:  We are hanging here...\n");

-                       while(1);
+                       panic_stop();

                        /* NOTREACHED */
                }
        }
                        /* NOTREACHED */
                }
        }


@@ -191,35 +285,87 @@ restart:
        panicwait = 1;
 
        PANIC_UNLOCK();
        panicwait = 1;
 
        PANIC_UNLOCK();

-       kdb_printf("panic(cpu %d): ", (unsigned) paniccpu);
-       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();
        /*
         * Release panicstr so that we can handle normally other panics.
         */
        PANIC_LOCK();
        panicstr = (char *)0;
        PANIC_UNLOCK();

-       mp_enable_preemption();
-       splx(s);
-       thread->wait_queue = save_waits[cpu_number()];  /* Restore the wait queue */
-       if (return_on_panic)
+
+       if (return_on_panic) {
+               panic_normal();
+               enable_preemption();
+               splx(s);

                return;
                return;

+       }

        kdb_printf("panic: We are hanging here...\n");
        kdb_printf("panic: We are hanging here...\n");

-       while(1);
+       panic_stop();

        /* NOTREACHED */
 }
 
 void
        /* NOTREACHED */
 }
 
 void

-log(int level, char *fmt, ...)
+panic(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;
+       Debugger("panic");
+       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;
 
 {
        va_list listp;
 


@@ -236,21 +382,295 @@ log(int level, char *fmt, ...)
 }
 
 void
 }
 
 void

-debug_log_init(void)
+debug_putc(char c)

 {
 {

-       if (debug_buf_size != 0)
+       if ((debug_buf_size != 0) &&
+               ((debug_buf_ptr-debug_buf) < (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) {
+       char proc_name[32] = "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(&ctask->bsd_info)) == sizeof(&ctask->bsd_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));
+}
+
+static 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;
                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;
+
+       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)
+static void panic_display_kernel_uuid(void) {
+       char tmp_kernel_uuid[sizeof(kernel_uuid)];
+
+       if (ml_nofault_copy((vm_offset_t) &kernel_uuid, (vm_offset_t) &tmp_kernel_uuid, sizeof(kernel_uuid)) != sizeof(kernel_uuid))
+               return;
+
+       if (tmp_kernel_uuid[0] != '\0')
+               kdb_printf("Kernel UUID: %s\n", tmp_kernel_uuid);
+}
+
+static void panic_display_kernel_aslr(void) {
+#if    defined(__x86_64__)
+       if (vm_kernel_slide) {
+               kdb_printf("Kernel slide:     0x%016lx\n", vm_kernel_slide);
+               kdb_printf("Kernel text base: %p\n", (void *) vm_kernel_stext);
+       }
+#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_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;
+
+__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;
+
+               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:%lu\n",zone_copy.zone_name,(uintptr_t)zone_copy.cur_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("Kernel Stacks:%lu\n",(uintptr_t)(kernel_stack_size * stack_total));
+
+#if defined(__i386__) || defined (__x86_64__)
+               kdb_printf("PageTables:%lu\n",(uintptr_t)(PAGE_SIZE * inuse_ptepages_count));
+#endif
+
+               kdb_printf("Kalloc.Large:%lu\n",(uintptr_t)kalloc_large_total);
+       }
+}
+
+#if CONFIG_ZLEAKS
+extern boolean_t       panic_include_ztrace;
+extern struct ztrace* top_ztrace;
+/*
+ * 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;
+               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\n", top_ztrace_copy.zt_stack[i]);
+                       }
+                       /* 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
+static struct 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 in_addr *, struct 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);
+int kdp_stack_snapshot_geterror(void);
+int kdp_stack_snapshot_bytes_traced(void);
+
+void *
+kdp_get_interface( void)
+{
+        return(void *)0;
+}
+
+unsigned int
+kdp_get_ip_address(void )
+{ return 0; }
+
+struct ether_addr
+kdp_get_mac_addr(void)
+{       
+        return kdp_current_mac_address;
+}
+
+void
+kdp_set_ip_and_mac_addresses(   
+        __unused struct in_addr          *ipaddr,
+        __unused struct 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_snapshot_preflight(__unused int pid, __unused void * tracebuf,
+               __unused uint32_t tracebuf_size, __unused uint32_t options)
+{}
+
+int
+kdp_stack_snapshot_geterror(void)
+{       
+        return -1;
+}
+
+int
+kdp_stack_snapshot_bytes_traced(void)
+{       
+        return 0;
+}
+
+#endif