X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/4d15aeb193b2c68f1d38666c317f8d3734f5f083..5ba3f43ea354af8ad55bea84372a2bc834d8757c:/osfmk/kern/debug.c diff --git a/osfmk/kern/debug.c b/osfmk/kern/debug.c index 5e74a85d1..a09bb897f 100644 --- a/osfmk/kern/debug.c +++ b/osfmk/kern/debug.c @@ -56,7 +56,10 @@ #include #include - +#include +#include +#include +#include #include #include #include @@ -72,9 +75,14 @@ #include #include #include +#include +#include +#include + #if !(MACH_KDP && CONFIG_KDP_INTERACTIVE_DEBUGGING) #include #endif +#include #if defined(__i386__) || defined(__x86_64__) #include @@ -93,77 +101,130 @@ #include -#if (defined(__arm64__) || defined(NAND_PANIC_DEVICE)) && !defined(LEGACY_PANIC_LOGS) +#if CONFIG_EMBEDDED #include /* For gPanicBase */ +#include +#include +extern volatile struct xnu_hw_shmem_dbg_command_info *hwsd_info; #endif 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 disable_debug_output = TRUE; -unsigned int systemLogDiags = FALSE; unsigned int panicDebugging = FALSE; -unsigned int logPanicDataToScreen = FALSE; unsigned int kdebug_serial = FALSE; -boolean_t lock_panic_mode = FALSE; +unsigned int kernel_debugger_entry_count = 0; + + +#if defined(__arm__) +#define TRAP_DEBUGGER __asm__ volatile("trap") +#elif defined(__arm64__) +/* + * Magic number; this should be identical to the __arm__ encoding for trap. + */ +#define TRAP_DEBUGGER __asm__ volatile(".long 0xe7ffdeff") +#elif defined (__x86_64__) +#define TRAP_DEBUGGER __asm__("int3") +#else +#error No TRAP_DEBUGGER for this architecture +#endif + +#if defined(__i386__) || defined(__x86_64__) +#define panic_stop() pmCPUHalt(PM_HALT_PANIC) +#else +#define panic_stop() panic_spin_forever() +#endif + +#define CPUDEBUGGEROP PROCESSOR_DATA(current_processor(), debugger_state).db_current_op +#define CPUDEBUGGERMSG PROCESSOR_DATA(current_processor(), debugger_state).db_message +#define CPUPANICSTR PROCESSOR_DATA(current_processor(), debugger_state).db_panic_str +#define CPUPANICARGS PROCESSOR_DATA(current_processor(), debugger_state).db_panic_args +#define CPUPANICOPTS PROCESSOR_DATA(current_processor(), debugger_state).db_panic_options +#define CPUDEBUGGERSYNC PROCESSOR_DATA(current_processor(), debugger_state).db_proceed_on_sync_failure +#define CPUDEBUGGERCOUNT PROCESSOR_DATA(current_processor(), debugger_state).db_entry_count +#define CPUDEBUGGERRET PROCESSOR_DATA(current_processor(), debugger_state).db_op_return +#define CPUPANICCALLER PROCESSOR_DATA(current_processor(), debugger_state).db_panic_caller + +#if DEVELOPMENT || DEBUG +#define DEBUGGER_DEBUGGING_NESTED_PANIC_IF_REQUESTED(requested) \ +MACRO_BEGIN \ + if (requested) { \ + volatile int *badpointer = (int *)4; \ + *badpointer = 0; \ + } \ +MACRO_END +#endif /* DEVELOPMENT || DEBUG */ + +debugger_op debugger_current_op = DBOP_NONE; +const char *debugger_panic_str = NULL; +va_list *debugger_panic_args = NULL; +uint64_t debugger_panic_options = 0; +const char *debugger_message = NULL; +unsigned long debugger_panic_caller = 0; + +void panic_trap_to_debugger(const char *panic_format_str, va_list *panic_args, unsigned int reason, void *ctx, uint64_t panic_options_mask, unsigned long panic_caller); +static void kdp_machine_reboot_type(unsigned int type); +__attribute__((noreturn)) void panic_spin_forever(void); +extern kern_return_t do_stackshot(void); int mach_assert = 1; -const char *panicstr = (char *) 0; -decl_simple_lock_data(,panic_lock) -int paniccpu; -volatile int panicwait; -volatile unsigned int nestedpanic= 0; -unsigned int panic_is_inited = 0; -unsigned int return_on_panic = 0; -unsigned long panic_caller; +#define NESTEDDEBUGGERENTRYMAX 5 -#define DEBUG_BUF_SIZE (3 * PAGE_SIZE) +#if CONFIG_EMBEDDED +#define DEBUG_BUF_SIZE (4096) +#define KDBG_TRACE_PANIC_FILENAME "/var/log/panic.trace" +#else +/* + * DEBUG_BUF_SIZE can't grow without updates to SMC and iBoot to store larger panic logs on co-processor systems */ +#define DEBUG_BUF_SIZE ((3 * PAGE_SIZE) + offsetof(struct macos_panic_header, mph_data)) +#define KDBG_TRACE_PANIC_FILENAME "/var/tmp/panic.trace" +#endif -/* 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; +/* debug_buf is directly linked with iBoot panic region for embedded targets */ +#if CONFIG_EMBEDDED +char *debug_buf_base = 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); +struct macos_panic_header *panic_info = (struct macos_panic_header *)debug_buf; +char *debug_buf_base = (debug_buf + offsetof(struct macos_panic_header, mph_data)); +char *debug_buf_ptr = (debug_buf + offsetof(struct macos_panic_header, mph_data)); + +/* + * We don't include the size of the panic header in the length of the data we actually write. + * On co-processor platforms, we lose sizeof(struct macos_panic_header) bytes from the end of + * the end of the log because we only support writing (3*PAGESIZE) bytes. + */ +const unsigned int debug_buf_size = (DEBUG_BUF_SIZE - offsetof(struct macos_panic_header, mph_data)); #endif -char *debug_buf_stackshot_start; -char *debug_buf_stackshot_end; +/* Debugger state */ +atomic_int debugger_cpu = ATOMIC_VAR_INIT(DEBUGGER_NO_CPU); +boolean_t debugger_allcpus_halted = FALSE; +boolean_t debugger_safe_to_return = TRUE; +unsigned int debugger_context = 0; static char model_name[64]; unsigned char *kernel_uuid; -/* uuid_string_t */ char kernel_uuid_string[37]; -char panic_disk_error_description[512]; -size_t panic_disk_error_description_size = sizeof(panic_disk_error_description); -static spl_t panic_prologue(const char *str); -static void panic_epilogue(spl_t s); +/* + * By default we treat Debugger() the same as calls to panic(), unless + * we have debug boot-args present and the DB_KERN_DUMP_ON_NMI *NOT* set. + * If DB_KERN_DUMP_ON_NMI is *NOT* set, return from Debugger() is supported. + * + * Return from Debugger() is currently only implemented on x86 + */ +static boolean_t debugger_is_panic = TRUE; -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; +char kernel_uuid_string[37]; /* uuid_string_t */ +char panic_disk_error_description[512]; +size_t panic_disk_error_description_size = sizeof(panic_disk_error_description); -/* Prevent CPP from breaking the definition below */ -#ifdef CONFIG_NO_PANIC_STRINGS -#undef Assert -#endif +extern unsigned int write_trace_on_panic; int kext_assertions_enable = #if DEBUG || DEVELOPMENT @@ -172,54 +233,6 @@ int kext_assertions_enable = FALSE; #endif -void __attribute__((noinline)) -Assert( - const char *file, - int line, - const char *expression - ) -{ - int saved_return_on_panic; - - if (!mach_assert) { - kprintf("%s:%d non-fatal Assertion: %s", file, line, expression); - return; - } - - 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; -} - -/* - * Carefully use the panic_lock. There's always a chance that - * somehow we'll call panic before getting to initialize the - * panic_lock -- in this case, we'll assume that the world is - * in uniprocessor mode and just avoid using the panic lock. - */ -#define PANIC_LOCK() \ -MACRO_BEGIN \ - if (panic_is_inited) \ - simple_lock(&panic_lock); \ -MACRO_END - -#define PANIC_UNLOCK() \ -MACRO_BEGIN \ - if (panic_is_inited) \ - simple_unlock(&panic_lock); \ -MACRO_END - void panic_init(void) { @@ -232,265 +245,725 @@ panic_init(void) 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; } + +#if !CONFIG_EMBEDDED + uint32_t debug_flags = 0; + + if (PE_i_can_has_debugger(&debug_flags) && !(debug_flags & DB_KERN_DUMP_ON_NMI)) { + debugger_is_panic = FALSE; + } +#endif + } void debug_log_init(void) { - if (debug_buf_size != 0) - return; -#if (defined(__arm64__) || defined(NAND_PANIC_DEVICE)) && !defined(LEGACY_PANIC_LOGS) +#if CONFIG_EMBEDDED 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; + /* Shift debug buf start location and size by the length of the panic header */ + debug_buf_base = (char *)gPanicBase + sizeof(struct embedded_panic_header); + debug_buf_ptr = debug_buf_base; + debug_buf_size = gPanicSize - sizeof(struct embedded_panic_header); #else - debug_buf_addr = debug_buf; - debug_buf_ptr = debug_buf; - debug_buf_size = sizeof(debug_buf); + assert(debug_buf_base != NULL); + assert(debug_buf_ptr != NULL); + assert(debug_buf_size != 0); + bzero(debug_buf, 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() +static void +DebuggerLock() +{ + int my_cpu = cpu_number(); + int debugger_exp_cpu = DEBUGGER_NO_CPU; + assert(ml_get_interrupts_enabled() == FALSE); + + if (debugger_cpu == my_cpu) { + return; + } + + while(!atomic_compare_exchange_strong(&debugger_cpu, &debugger_exp_cpu, my_cpu)) { + debugger_exp_cpu = DEBUGGER_NO_CPU; + } + + return; +} + +static void +DebuggerUnlock() +{ + assert(debugger_cpu == cpu_number()); + + /* + * We don't do an atomic exchange here in case + * there's another CPU spinning to acquire the debugger_lock + * and we never get a chance to update it. We already have the + * lock so we can simply store DEBUGGER_NO_CPU and follow with + * a barrier. + */ + debugger_cpu = DEBUGGER_NO_CPU; + OSMemoryBarrier(); + + return; +} + +static kern_return_t +DebuggerHaltOtherCores(boolean_t proceed_on_failure) +{ +#if CONFIG_EMBEDDED + return DebuggerXCallEnter(proceed_on_failure); +#else /* CONFIG_EMBEDDED */ +#pragma unused(proceed_on_failure) + mp_kdp_enter(proceed_on_failure); + return KERN_SUCCESS; #endif +} + +static void +DebuggerResumeOtherCores() +{ +#if CONFIG_EMBEDDED + DebuggerXCallReturn(); +#else /* CONFIG_EMBEDDED */ + mp_kdp_exit(); +#endif +} + +static void +DebuggerSaveState(debugger_op db_op, const char *db_message, const char *db_panic_str, + va_list *db_panic_args, uint64_t db_panic_options, + boolean_t db_proceed_on_sync_failure, unsigned long db_panic_caller) +{ + CPUDEBUGGEROP = db_op; + + /* Preserve the original panic message */ + if (CPUDEBUGGERCOUNT == 1 || CPUPANICSTR == NULL) { + CPUDEBUGGERMSG = db_message; + CPUPANICSTR = db_panic_str; + CPUPANICARGS = db_panic_args; + CPUPANICCALLER = db_panic_caller; + } else if (CPUDEBUGGERCOUNT > 1 && db_panic_str != NULL) { + kprintf("Nested panic detected: %s", db_panic_str); + } + + CPUDEBUGGERSYNC = db_proceed_on_sync_failure; + CPUDEBUGGERRET = KERN_SUCCESS; + + /* Reset these on any nested panics */ + CPUPANICOPTS = db_panic_options; + + return; +} /* - * Prevent CPP from breaking the definition below, - * since all clients get a #define to prepend line numbers + * Save the requested debugger state/action into the current processor's processor_data + * and trap to the debugger. */ -#undef panic +kern_return_t +DebuggerTrapWithState(debugger_op db_op, const char *db_message, const char *db_panic_str, + va_list *db_panic_args, uint64_t db_panic_options, + boolean_t db_proceed_on_sync_failure, unsigned long db_panic_caller) +{ + kern_return_t ret; + + assert(ml_get_interrupts_enabled() == FALSE); + DebuggerSaveState(db_op, db_message, db_panic_str, + db_panic_args, db_panic_options, db_proceed_on_sync_failure, + db_panic_caller); + + TRAP_DEBUGGER; + + ret = CPUDEBUGGERRET; -void _consume_panic_args(int a __unused, ...) + DebuggerSaveState(DBOP_NONE, NULL, NULL, NULL, 0, FALSE, 0); + + return ret; +} + +void __attribute__((noinline)) +Assert( + const char *file, + int line, + const char *expression + ) { - panic("panic"); + if (!mach_assert) { + kprintf("%s:%d non-fatal Assertion: %s", file, line, expression); + return; + } + + panic_plain("%s:%d Assertion failed: %s", file, line, expression); } -extern unsigned int write_trace_on_panic; -static spl_t -panic_prologue(const char *str) +void +Debugger(const char *message) { - spl_t s; + DebuggerWithContext(0, NULL, message, DEBUGGER_OPTION_NONE); +} - 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"); - } - } +void +DebuggerWithContext(unsigned int reason, void *ctx, const char *message, + uint64_t debugger_options_mask) +{ + spl_t previous_interrupts_state; + boolean_t old_doprnt_hide_pointers = doprnt_hide_pointers; - s = splhigh(); + previous_interrupts_state = ml_set_interrupts_enabled(FALSE); disable_preemption(); - /* Locking code should relax some checks at panic time */ - lock_panic_mode = TRUE; -#if defined(__i386__) || defined(__x86_64__) - /* Attempt to display the unparsed panic string */ - const char *tstr = str; + CPUDEBUGGERCOUNT++; - kprintf("Panic initiated, string: "); - while (tstr && *tstr) - kprintf("%c", *tstr++); - kprintf("\n"); -#endif - - panic_safe(); + if (CPUDEBUGGERCOUNT > NESTEDDEBUGGERENTRYMAX) { + static boolean_t in_panic_kprintf = FALSE; - if( logPanicDataToScreen ) - disable_debug_output = FALSE; - - debug_mode = TRUE; + /* Notify any listeners that we've started a panic */ + PEHaltRestart(kPEPanicBegin); -restart: - PANIC_LOCK(); + if (!in_panic_kprintf) { + in_panic_kprintf = TRUE; + kprintf("Detected nested debugger entry count exceeding %d\n", + NESTEDDEBUGGERENTRYMAX); + in_panic_kprintf = FALSE; + } - if (panicstr) { - if (cpu_number() != paniccpu) { - PANIC_UNLOCK(); - /* - * Wait until message has been printed to identify correct - * cpu that made the first panic. - */ - while (panicwait) - continue; - goto restart; - } else { - nestedpanic +=1; - PANIC_UNLOCK(); - // Other cores will not be resumed on double panic - Debugger("double panic"); - // a printf statement here was removed to avoid a panic-loop caused - // by a panic from printf - panic_stop(); - /* NOTREACHED */ + if (!panicDebugging) { + kdp_machine_reboot_type(kPEPanicRestartCPU); } + + panic_spin_forever(); } - panicstr = str; - paniccpu = cpu_number(); - panicwait = 1; - PANIC_UNLOCK(); +#if DEVELOPMENT || DEBUG + DEBUGGER_DEBUGGING_NESTED_PANIC_IF_REQUESTED((debugger_options_mask & DEBUGGER_OPTION_RECURPANIC_ENTRY)); +#endif + + doprnt_hide_pointers = FALSE; + + if (ctx != NULL) { + DebuggerSaveState(DBOP_DEBUGGER, message, + NULL, NULL, debugger_options_mask, TRUE, 0); + handle_debugger_trap(reason, 0, 0, ctx); + DebuggerSaveState(DBOP_NONE, NULL, NULL, + NULL, 0, FALSE, 0); + } else { + DebuggerTrapWithState(DBOP_DEBUGGER, message, + NULL, NULL, debugger_options_mask, TRUE, 0); + } - // halt other cores now in anticipation of the debugger call - return(s); + CPUDEBUGGERCOUNT--; + doprnt_hide_pointers = old_doprnt_hide_pointers; + enable_preemption(); + ml_set_interrupts_enabled(previous_interrupts_state); +} + +static struct kdp_callout { + struct kdp_callout * callout_next; + kdp_callout_fn_t callout_fn; + boolean_t callout_in_progress; + void * callout_arg; +} * kdp_callout_list = NULL; + +/* + * Called from kernel context to register a kdp event callout. + */ +void +kdp_register_callout(kdp_callout_fn_t fn, void * arg) +{ + struct kdp_callout * kcp; + struct kdp_callout * list_head; + + kcp = kalloc(sizeof(*kcp)); + if (kcp == NULL) + panic("kdp_register_callout() kalloc failed"); + + kcp->callout_fn = fn; + kcp->callout_arg = arg; + kcp->callout_in_progress = FALSE; + + /* Lock-less list insertion using compare and exchange. */ + do { + list_head = kdp_callout_list; + kcp->callout_next = list_head; + } while (!OSCompareAndSwapPtr(list_head, kcp, &kdp_callout_list)); } -#if DEVELOPMENT || DEBUG -static void -panic_epilogue(spl_t s) -#else -#if !defined(__i386__) && !defined(__x86_64__) -__attribute__((noreturn)) -#endif static void -panic_epilogue(__unused spl_t s) -#endif +kdp_callouts(kdp_event_t event) { - /* - * Release panicstr so that we can handle normally other panics. - */ - PANIC_LOCK(); - panicstr = (char *)0; - PANIC_UNLOCK(); + struct kdp_callout *kcp = kdp_callout_list; -#if DEVELOPMENT || DEBUG - if (return_on_panic) { - // resume other cores as we are returning - panic_normal(); - enable_preemption(); - splx(s); - return; + while (kcp) { + if (!kcp->callout_in_progress) { + kcp->callout_in_progress = TRUE; + kcp->callout_fn(kcp->callout_arg, event); + kcp->callout_in_progress = FALSE; + } + kcp = kcp->callout_next; } -#endif - kdb_printf("panic: We are hanging here...\n"); - panic_stop(); - /* NOTREACHED */ } -#if !DEVELOPMENT && !DEBUG && !defined(__i386__) && !defined(__x86_64__) -__attribute__((noreturn)) -#endif +/* + * An overview of the xnu panic path: + * + * Several panic wrappers (panic(), panic_with_options(), etc.) all funnel into panic_trap_to_debugger(). + * panic_trap_to_debugger() sets the panic state in the current processor's processor_data_t prior + * to trapping into the debugger. Once we trap to the debugger, we end up in handle_debugger_trap() + * which tries to acquire the panic lock by atomically swapping the current CPU number into debugger_cpu. + * debugger_cpu acts as a synchronization point, from which the winning CPU can halt the other cores and + * continue to debugger_collect_diagnostics() where we write the paniclog, corefile (if appropriate) and proceed + * according to the device's boot-args. + */ +#undef panic void panic(const char *str, ...) { - va_list listp; - spl_t s; - boolean_t old_doprnt_hide_pointers = doprnt_hide_pointers; + va_list panic_str_args; + + va_start(panic_str_args, str); + panic_trap_to_debugger(str, &panic_str_args, 0, NULL, 0, (unsigned long)(char *)__builtin_return_address(0)); + va_end(panic_str_args); +} + +void +panic_with_options(unsigned int reason, void *ctx, uint64_t debugger_options_mask, const char *str, ...) +{ + va_list panic_str_args; + + va_start(panic_str_args, str); + panic_trap_to_debugger(str, &panic_str_args, reason, ctx, debugger_options_mask, (unsigned long)(char *)__builtin_return_address(0)); + va_end(panic_str_args); +} + +void +panic_context(unsigned int reason, void *ctx, const char *str, ...) +{ + va_list panic_str_args; + + va_start(panic_str_args, str); + panic_trap_to_debugger(str, &panic_str_args, reason, ctx, 0, (unsigned long)(char *)__builtin_return_address(0)); + va_end(panic_str_args); +} + +#pragma clang diagnostic push +#pragma clang diagnostic ignored "-Wmissing-noreturn" +void +panic_trap_to_debugger(const char *panic_format_str, va_list *panic_args, unsigned int reason, void + *ctx, uint64_t panic_options_mask, unsigned long panic_caller) +{ +#pragma clang diagnostic pop + + if (ml_wants_panic_trap_to_debugger()) { + ml_panic_trap_to_debugger(panic_format_str, panic_args, reason, ctx, panic_options_mask, panic_caller); + + /* + * This should not return, but we return here for the tail call + * as it simplifies the backtrace. + */ + return; + } + + CPUDEBUGGERCOUNT++; + + if (CPUDEBUGGERCOUNT > NESTEDDEBUGGERENTRYMAX) { + static boolean_t in_panic_kprintf = FALSE; + + /* Notify any listeners that we've started a panic */ + PEHaltRestart(kPEPanicBegin); + + if (!in_panic_kprintf) { + in_panic_kprintf = TRUE; + kprintf("Detected nested debugger entry count exceeding %d\n", + NESTEDDEBUGGERENTRYMAX); + in_panic_kprintf = FALSE; + } + + if (!panicDebugging) { + kdp_machine_reboot_type(kPEPanicRestartCPU); + } + + panic_spin_forever(); + } + +#if DEVELOPMENT || DEBUG + DEBUGGER_DEBUGGING_NESTED_PANIC_IF_REQUESTED((panic_options_mask & DEBUGGER_OPTION_RECURPANIC_ENTRY)); +#endif + +#if CONFIG_EMBEDDED + if (PE_arm_debug_panic_hook) + PE_arm_debug_panic_hook(panic_format_str); +#endif #if defined (__x86_64__) plctrace_disable(); #endif - /* panic_caller is initialized to 0. If set, don't change it */ - if ( ! panic_caller ) - panic_caller = (unsigned long)(char *)__builtin_return_address(0); + if (write_trace_on_panic && kdebug_enable) { + if (get_preemption_level() == 0 && !ml_at_interrupt_context()) { + ml_set_interrupts_enabled(TRUE); + KDBG(TRACE_PANIC); + kdbg_dump_trace_to_file(KDBG_TRACE_PANIC_FILENAME); + } + } + + ml_set_interrupts_enabled(FALSE); + disable_preemption(); - s = panic_prologue(str); +#if defined (__x86_64__) + pmSafeMode(x86_lcpu(), PM_SAFE_FL_SAFE); +#endif /* defined (__x86_64__) */ /* 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); + if (ctx != NULL) { + /* + * We called into panic from a trap, no need to trap again. Set the + * state on the current CPU and then jump to handle_debugger_trap. + */ + DebuggerSaveState(DBOP_PANIC, "panic", + panic_format_str, panic_args, + panic_options_mask, TRUE, panic_caller); + handle_debugger_trap(reason, 0, 0, ctx); } - kdb_printf("\n"); +#if defined(__arm64__) /* - * Release panicwait indicator so that other cpus may call Debugger(). + * Signal to fastsim that it should open debug ports (nop on hardware) */ - panicwait = 0; - Debugger("panic"); + __asm__ volatile("HINT 0x45"); +#endif /* defined(__arm64__) */ - doprnt_hide_pointers = old_doprnt_hide_pointers; + DebuggerTrapWithState(DBOP_PANIC, "panic", panic_format_str, + panic_args, panic_options_mask, TRUE, panic_caller); - panic_epilogue(s); + /* + * Not reached. + */ + panic_stop(); } -/* - * panic_with_options: wraps the panic call in a way that allows us to pass - * a bitmask of specific debugger options. - */ -#if !DEVELOPMENT && !DEBUG && !defined(__i386__) && !defined(__x86_64__) __attribute__((noreturn)) -#endif void -panic_with_options(unsigned int reason, void *ctx, uint64_t debugger_options_mask, const char *str, ...) +panic_spin_forever() { - va_list listp; - spl_t s; + paniclog_append_noflush("\nPlease go to https://panic.apple.com to report this panic\n"); + + for (;;) { } +} + +static void +kdp_machine_reboot_type(unsigned int type) +{ + printf("Attempting system restart..."); + PEHaltRestart(type); + halt_all_cpus(TRUE); +} + +void +kdp_machine_reboot(void) +{ + kdp_machine_reboot_type(kPEPanicRestartCPU); +} + +/* + * Gather and save diagnostic information about a panic (or Debugger call). + * + * On embedded, Debugger and Panic are treated very similarly -- WDT uses Debugger so we can + * theoretically return from it. On desktop, Debugger is treated as a conventional debugger -- i.e no + * paniclog is written and no core is written unless we request a core on NMI. + * + * This routine handles kicking off local coredumps, paniclogs, calling into the Debugger/KDP (if it's configured), + * and calling out to any other functions we have for collecting diagnostic info. + */ +static void +debugger_collect_diagnostics(unsigned int exception, unsigned int code, unsigned int subcode, void *state) +{ +#if DEVELOPMENT || DEBUG + DEBUGGER_DEBUGGING_NESTED_PANIC_IF_REQUESTED((debugger_panic_options & DEBUGGER_OPTION_RECURPANIC_PRELOG)); +#endif + +#if defined(__x86_64__) + kprintf("Debugger called: <%s>\n", debugger_message); +#endif + /* + * DB_HALT (halt_in_debugger) can be requested on startup, we shouldn't generate + * a coredump/paniclog for this type of debugger entry. If KDP isn't configured, + * we'll just spin in kdp_raise_exception. + */ + if (debugger_current_op == DBOP_DEBUGGER && halt_in_debugger) { + kdp_raise_exception(exception, code, subcode, state); + if (debugger_safe_to_return && !debugger_is_panic) { + return; + } + } + + if ((debugger_current_op == DBOP_PANIC) || + (debugger_current_op == DBOP_DEBUGGER && debugger_is_panic)) { + /* + * Attempt to notify listeners once and only once that we've started + * panicking. Only do this for Debugger() calls if we're treating + * Debugger() calls like panic(). + */ + PEHaltRestart(kPEPanicBegin); + + /* + * Set the begin pointer in the panic log structure. We key off of this + * static variable rather than contents from the panic header itself in case someone + * has stomped over the panic_info structure. Also initializes the header magic. + */ + static boolean_t began_writing_paniclog = FALSE; + if (!began_writing_paniclog) { + PE_init_panicheader(); + began_writing_paniclog = TRUE; + } else { + /* + * If we reached here, update the panic header to keep it as consistent + * as possible during a nested panic + */ + PE_update_panicheader_nestedpanic(); + } + } + + /* + * Write panic string if this was a panic. + * + * TODO: Consider moving to SavePanicInfo as this is part of the panic log. + */ + if (debugger_current_op == DBOP_PANIC) { + paniclog_append_noflush("panic(cpu %d caller 0x%lx): ", (unsigned) cpu_number(), debugger_panic_caller); + if (debugger_panic_str) { + _doprnt(debugger_panic_str, debugger_panic_args, consdebug_putc, 0); + } + paniclog_append_noflush("\n"); + } + + /* + * Debugger() is treated like panic() on embedded -- for example we use it for WDT + * panics (so we need to write a paniclog). On desktop Debugger() is used in the + * conventional sense. + */ +#if defined(__x86_64__) + if (debugger_current_op == DBOP_PANIC) +#endif + { + kdp_callouts(KDP_EVENT_PANICLOG); + /* + * Write paniclog and panic stackshot (if supported) + * TODO: Need to clear panic log when return from debugger + * hooked up for embedded + */ + SavePanicInfo(debugger_message, debugger_panic_options); - /* panic_caller is initialized to 0. If set, don't change it */ - if ( ! panic_caller ) - panic_caller = (unsigned long)(char *)__builtin_return_address(0); +#if DEVELOPMENT || DEBUG + DEBUGGER_DEBUGGING_NESTED_PANIC_IF_REQUESTED((debugger_panic_options & DEBUGGER_OPTION_RECURPANIC_POSTLOG)); +#endif - 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); + /* DEBUGGER_OPTION_PANICLOGANDREBOOT is used for two finger resets on embedded so we get a paniclog */ + if (debugger_panic_options & DEBUGGER_OPTION_PANICLOGANDREBOOT) + PEHaltRestart(kPEPanicRestartCPU); } - kdb_printf("\n"); + +#if CONFIG_KDP_INTERACTIVE_DEBUGGING + uint32_t debug_flags = 0; + PE_i_can_has_debugger(&debug_flags); /* - * Release panicwait indicator so that other cpus may call Debugger(). + * If reboot on panic is enabled and the caller of panic indicated that we should skip + * local coredumps, don't try to write these and instead go straight to reboot. This + * allows us to persist any data that's stored in the panic log. */ - panicwait = 0; - DebuggerWithContext(reason, ctx, "panic", debugger_options_mask); - panic_epilogue(s); + if ((debugger_panic_options & DEBUGGER_OPTION_SKIP_LOCAL_COREDUMP) && + (debug_flags & DB_REBOOT_POST_CORE)) { + kdp_machine_reboot_type(kPEPanicRestartCPU); + } + + /* + * Consider generating a local corefile if the infrastructure is configured + * and we haven't disabled on-device coredumps. + */ + if (kdp_has_polled_corefile() && !(debug_flags & DB_DISABLE_LOCAL_CORE)) { + int ret = -1; + +#if defined (__x86_64__) + /* On x86 we don't do a coredump on Debugger unless the DB_KERN_DUMP_ON_NMI boot-arg is specified. */ + if (debugger_current_op != DBOP_DEBUGGER || (debug_flags & DB_KERN_DUMP_ON_NMI)) +#endif + { + /* + * Doing an on-device coredump leaves the disk driver in a state + * that can not be resumed. + */ + debugger_safe_to_return = FALSE; + begin_panic_transfer(); + ret = kern_dump(KERN_DUMP_DISK); + abort_panic_transfer(); + +#if DEVELOPMENT || DEBUG + DEBUGGER_DEBUGGING_NESTED_PANIC_IF_REQUESTED((debugger_panic_options & DEBUGGER_OPTION_RECURPANIC_POSTCORE)); +#endif + } + + /* If we wrote a corefile and DB_REBOOT_POST_CORE is set, reboot */ + if (ret == 0 && (debug_flags & DB_REBOOT_POST_CORE)) + kdp_machine_reboot_type(kPEPanicRestartCPU); + } + + /* If KDP is configured, try to trap to the debugger */ + if (current_debugger != NO_CUR_DB) { + kdp_raise_exception(exception, code, subcode, state); + /* + * Only return if we entered via Debugger and it's safe to return + * (we halted the other cores successfully, this isn't a nested panic, etc) + */ + if (debugger_current_op == DBOP_DEBUGGER && + debugger_safe_to_return && + kernel_debugger_entry_count == 1 && + !debugger_is_panic) { + return; + } + } + +#if CONFIG_EMBEDDED + if (panicDebugging) { + /* If panic debugging is configured, spin for astris to connect */ + panic_spin_shmcon(); + } +#endif /* CONFIG_EMBEDDED */ +#endif /* CONFIG_KDP_INTERACTIVE_DEBUGGING */ + + if (!panicDebugging) { + kdp_machine_reboot_type(kPEPanicRestartCPU); + } + + panic_spin_forever(); } -#if !DEVELOPMENT && !DEBUG && !defined(__i386__) && !defined(__x86_64__) -__attribute__((noreturn)) +#if INTERRUPT_MASKED_DEBUG +uint64_t debugger_trap_timestamps[9]; +# define DEBUGGER_TRAP_TIMESTAMP(i) debugger_trap_timestamps[i] = mach_absolute_time(); +#else +# define DEBUGGER_TRAP_TIMESTAMP(i) #endif + void -panic_context(unsigned int reason, void *ctx, const char *str, ...) +handle_debugger_trap(unsigned int exception, unsigned int code, unsigned int subcode, void *state) { - va_list listp; - spl_t s; + unsigned int initial_not_in_kdp = not_in_kdp; + kern_return_t ret; + debugger_op db_prev_op = debugger_current_op; + + DEBUGGER_TRAP_TIMESTAMP(0); + + DebuggerLock(); + ret = DebuggerHaltOtherCores(CPUDEBUGGERSYNC); + DEBUGGER_TRAP_TIMESTAMP(1); - /* 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); +#if INTERRUPT_MASKED_DEBUG + if (serialmode & SERIALMODE_OUTPUT) { + ml_spin_debug_reset(current_thread()); + } +#endif + if (ret != KERN_SUCCESS) { + CPUDEBUGGERRET = ret; + DebuggerUnlock(); + return; + } + + /* Update the global panic/debugger nested entry level */ + kernel_debugger_entry_count = CPUDEBUGGERCOUNT; + + /* + * TODO: Should we do anything special for nested panics here? i.e. if we've trapped more than twice + * should we call into the debugger if it's configured and then reboot if the panic log has been written? + */ + + if (CPUDEBUGGEROP == DBOP_NONE) { + /* If there was no debugger context setup, we trapped due to a software breakpoint */ + debugger_current_op = DBOP_BREAKPOINT; + } else { + /* Not safe to return from a nested panic/debugger call */ + if (debugger_current_op == DBOP_PANIC || + debugger_current_op == DBOP_DEBUGGER) { + debugger_safe_to_return = FALSE; + } + + debugger_current_op = CPUDEBUGGEROP; + + /* Only overwrite the panic message if there is none already - save the data from the first call */ + if (debugger_panic_str == NULL) { + debugger_panic_str = CPUPANICSTR; + debugger_panic_args = CPUPANICARGS; + debugger_message = CPUDEBUGGERMSG; + debugger_panic_caller = CPUPANICCALLER; + } + + debugger_panic_options = CPUPANICOPTS; } - kdb_printf("\n"); /* - * Release panicwait indicator so that other cpus may call Debugger(). + * Clear the op from the processor debugger context so we can handle + * breakpoints in the debugger */ - panicwait = 0; - DebuggerWithContext(reason, ctx, "panic", DEBUGGER_OPTION_NONE); - panic_epilogue(s); + CPUDEBUGGEROP = DBOP_NONE; + + DEBUGGER_TRAP_TIMESTAMP(2); + + kdp_callouts(KDP_EVENT_ENTER); + not_in_kdp = 0; + + DEBUGGER_TRAP_TIMESTAMP(3); + + if (debugger_current_op == DBOP_BREAKPOINT) { + kdp_raise_exception(exception, code, subcode, state); + } else if (debugger_current_op == DBOP_STACKSHOT) { + CPUDEBUGGERRET = do_stackshot(); +#if PGO + } else if (debugger_current_op == DBOP_RESET_PGO_COUNTERS) { + CPUDEBUGGERRET = do_pgo_reset_counters(); +#endif + } else { + debugger_collect_diagnostics(exception, code, subcode, state); + } + + DEBUGGER_TRAP_TIMESTAMP(4); + + not_in_kdp = initial_not_in_kdp; + kdp_callouts(KDP_EVENT_EXIT); + + DEBUGGER_TRAP_TIMESTAMP(5); + + if (debugger_current_op != DBOP_BREAKPOINT) { + debugger_panic_str = NULL; + debugger_panic_args = NULL; + debugger_panic_options = 0; + debugger_message = NULL; + } + + /* Restore the previous debugger state */ + debugger_current_op = db_prev_op; + + DEBUGGER_TRAP_TIMESTAMP(6); + + DebuggerResumeOtherCores(); + + DEBUGGER_TRAP_TIMESTAMP(7); + + DebuggerUnlock(); + + DEBUGGER_TRAP_TIMESTAMP(8); + + return; } __attribute__((noinline,not_tail_called)) @@ -520,8 +993,9 @@ void log(__unused int level, char *fmt, ...) } /* - * Skip appending log messages to the new logging infrastructure in contexts - * where safety is uncertain. These contexts include: + * Per , skip appending log messages to + * the new logging infrastructure in contexts where safety is + * uncertain. These contexts include: * - When we're in the debugger * - We're in a panic * - Interrupts are disabled @@ -529,28 +1003,50 @@ void log(__unused int level, char *fmt, ...) * In all the above cases, it is potentially unsafe to log messages. */ -boolean_t oslog_is_safe(void) { - return (debug_mode == 0 && +boolean_t +oslog_is_safe(void) { + return (kernel_debugger_entry_count == 0 && not_in_kdp == 1 && get_preemption_level() == 0 && ml_get_interrupts_enabled() == TRUE); } +boolean_t +debug_mode_active(void) +{ + return ((0 != kernel_debugger_entry_count != 0) || (0 == not_in_kdp)); +} + void debug_putc(char c) { if ((debug_buf_size != 0) && - ((debug_buf_ptr-debug_buf_addr) < (int)debug_buf_size)) { + ((debug_buf_ptr - debug_buf_base) < (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. - */ +#if defined (__x86_64__) +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)); -int packA(char *inbuf, uint32_t length, uint32_t buflen) +typedef struct pasc pasc_t; + +/* + * In-place packing routines -- inefficient, but they're called at most once. + * Assumes "buflen" is a multiple of 8. Used for compressing paniclogs on x86. + */ +int +packA(char *inbuf, uint32_t length, uint32_t buflen) { unsigned int i, j = 0; pasc_t pack; @@ -573,7 +1069,8 @@ int packA(char *inbuf, uint32_t length, uint32_t buflen) return j; } -void unpackA(char *inbuf, uint32_t length) +void +unpackA(char *inbuf, uint32_t length) { pasc_t packs; unsigned i = 0; @@ -592,6 +1089,7 @@ void unpackA(char *inbuf, uint32_t length) inbuf[i++] = packs.h; } } +#endif /* defined (__x86_64__) */ extern void *proc_name_address(void *p); @@ -606,18 +1104,21 @@ panic_display_process_name(void) { 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); + paniclog_append_noflush("\nBSD process name corresponding to current thread: %s\n", proc_name); } -unsigned panic_active(void) { - return ((panicstr != (char *) 0)); +unsigned +panic_active(void) { + return ((debugger_panic_str != (char *) 0)); } -void populate_model_name(char *model_string) { +void +populate_model_name(char *model_string) { strlcpy(model_name, model_string, sizeof(model_name)); } -void panic_display_model_name(void) { +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)) @@ -626,44 +1127,49 @@ void panic_display_model_name(void) { 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); + paniclog_append_noflush("System model name: %s\n", tmp_model_name); } -void panic_display_kernel_uuid(void) { +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); + paniclog_append_noflush("Kernel UUID: %s\n", tmp_kernel_uuid); } -void panic_display_kernel_aslr(void) { +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); + paniclog_append_noflush("Kernel slide: 0x%016lx\n", (unsigned long) vm_kernel_slide); + paniclog_append_noflush("Kernel text base: %p\n", (void *) vm_kernel_stext); } } -void panic_display_hibb(void) { +void +panic_display_hibb(void) { #if defined(__i386__) || defined (__x86_64__) - kdb_printf("__HIB text base: %p\n", (void *) vm_hib_base); + paniclog_append_noflush("__HIB text base: %p\n", (void *) vm_hib_base); #endif } -static void panic_display_uptime(void) { +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); + paniclog_append_noflush("\nSystem uptime in nanoseconds: %llu\n", uptime); } -static void panic_display_disk_errors(void) { +static void +panic_display_disk_errors(void) { if (panic_disk_error_description[0]) { panic_disk_error_description[sizeof(panic_disk_error_description) - 1] = '\0'; - kdb_printf("Root disk errors: \"%s\"\n", panic_disk_error_description); + paniclog_append_noflush("Root disk errors: \"%s\"\n", panic_disk_error_description); } }; @@ -672,16 +1178,17 @@ extern char osversion[]; static volatile uint32_t config_displayed = 0; -__private_extern__ void panic_display_system_configuration(boolean_t launchd_exit) { +__private_extern__ void +panic_display_system_configuration(boolean_t launchd_exit) { if (!launchd_exit) panic_display_process_name(); if (OSCompareAndSwap(0, 1, &config_displayed)) { char buf[256]; if (!launchd_exit && strlcpy(buf, PE_boot_args(), sizeof(buf))) - kdb_printf("Boot args: %s\n", buf); - kdb_printf("\nMac OS version:\n%s\n", + paniclog_append_noflush("Boot args: %s\n", buf); + paniclog_append_noflush("\nMac OS version:\n%s\n", (osversion[0] != 0) ? osversion : "Not yet set"); - kdb_printf("\nKernel version:\n%s\n",version); + paniclog_append_noflush("\nKernel version:\n%s\n",version); panic_display_kernel_uuid(); if (!launchd_exit) { panic_display_kernel_aslr(); @@ -696,7 +1203,7 @@ __private_extern__ void panic_display_system_configuration(boolean_t launchd_exi #if CONFIG_ZLEAKS panic_display_ztrace(); #endif /* CONFIG_ZLEAKS */ - kext_dump_panic_lists(&kdb_log); + kext_dump_panic_lists(&paniclog_append_noflush); } } } @@ -704,44 +1211,45 @@ __private_extern__ void panic_display_system_configuration(boolean_t launchd_exi extern unsigned int stack_total; extern unsigned long long stack_allocs; -#if defined(__i386__) || defined (__x86_64__) +#if 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; +extern boolean_t panic_include_zprint; +extern mach_memory_info_t *panic_kext_memory_info; +extern vm_size_t panic_kext_memory_size; -__private_extern__ void panic_display_zprint() +__private_extern__ void +panic_display_zprint() { if(panic_include_zprint == TRUE) { unsigned int i; struct zone zone_copy; - kdb_printf("%-20s %10s %10s\n", "Zone Name", "Cur Size", "Free Size"); + paniclog_append_noflush("%-20s %10s %10s\n", "Zone Name", "Cur Size", "Free Size"); for (i = 0; i < num_zones; i++) { if(ml_nofault_copy((vm_offset_t)(&zone_array[i]), (vm_offset_t)&zone_copy, sizeof(struct zone)) == sizeof(struct zone)) { 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)); + paniclog_append_noflush("%-20s %10lu %10lu\n",zone_copy.zone_name, (uintptr_t)zone_copy.cur_size,(uintptr_t)(zone_copy.countfree * zone_copy.elem_size)); } } } - kdb_printf("%-20s %10lu\n", "Kernel Stacks", (uintptr_t)(kernel_stack_size * stack_total)); + paniclog_append_noflush("%-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)); +#if defined (__x86_64__) + paniclog_append_noflush("%-20s %10lu\n", "PageTables",(uintptr_t)(PAGE_SIZE * inuse_ptepages_count)); #endif - kdb_printf("%-20s %10lu\n", "Kalloc.Large", (uintptr_t)kalloc_large_total); + paniclog_append_noflush("%-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++) { + mach_memory_info_t *mem_info = panic_kext_memory_info; + paniclog_append_noflush("\n%-5s %10s\n", "Kmod", "Size"); + for (i = 0; i < (panic_kext_memory_size / sizeof(mach_zone_info_t)); 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); + paniclog_append_noflush("%-5lld %10lld\n", mem_info[i].site, mem_info[i].size); } } } @@ -749,12 +1257,13 @@ __private_extern__ void panic_display_zprint() } #if CONFIG_ECC_LOGGING -__private_extern__ void panic_display_ecc_errors() +__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); + paniclog_append_noflush("ECC Corrections:%u\n", count); } } #endif /* CONFIG_ECC_LOGGING */ @@ -768,7 +1277,8 @@ 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) +__private_extern__ void +panic_display_ztrace(void) { if(panic_include_ztrace == TRUE) { unsigned int i = 0; @@ -779,89 +1289,50 @@ __private_extern__ void panic_display_ztrace(void) /* 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); + paniclog_append_noflush("\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]); + paniclog_append_noflush("%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"); + paniclog_append_noflush("\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"); + paniclog_append_noflush("\nCan't access top_ztrace...\n"); } - kdb_printf("\n"); + paniclog_append_noflush("\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 *); - -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) +int +telemetry_gather(user_addr_t buffer __unused, uint32_t *length __unused, boolean_t mark __unused) { return KERN_NOT_SUPPORTED; } #endif + +#include + +uint32_t kern_feature_overrides = 0; + +boolean_t kern_feature_override(uint32_t fmask) { + if (kern_feature_overrides == 0) { + uint32_t fdisables = 0; + /* Expected to be first invoked early, in a single-threaded + * environment + */ + if (PE_parse_boot_argn("validation_disables", &fdisables, sizeof(fdisables))) { + fdisables |= KF_INITIALIZED; + kern_feature_overrides = fdisables; + } else { + kern_feature_overrides |= KF_INITIALIZED; + } + } + return ((kern_feature_overrides & fmask) == fmask); +}