X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/378393581903b274cb7a4d18e0d978071a6b592d..3e170ce000f1506b7b5d2c5c7faec85ceabb573d:/osfmk/kern/debug.c diff --git a/osfmk/kern/debug.c b/osfmk/kern/debug.c index c5f6cf3d9..2c79aacdf 100644 --- a/osfmk/kern/debug.c +++ b/osfmk/kern/debug.c @@ -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@ @@ -49,24 +55,43 @@ */ #include -#include -#include #include #include -#include +#include #include #include #include #include #include +#include +#include +#include +#include #include #include #include +#if !(MACH_KDP && CONFIG_KDP_INTERACTIVE_DEBUGGING) +#include +#endif -#ifdef __ppc__ -#include -#include +#if defined(__i386__) || defined(__x86_64__) +#include +#include +#endif + +#include +#include + +#include +#include +#include +#include +#include +#include + +#if (defined(__arm64__) || defined(NAND_PANIC_DEVICE)) && !defined(LEGACY_PANIC_LOGS) +#include /* 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)¤t_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