/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_OSREFERENCE_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
- * 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.
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ 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.
*
- * 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, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
+ * 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, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
* limitations under the License.
*
- * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* file: pe_init.c
* i386 platform expert initialization.
*/
+
+#include <console/video_console.h>
#include <sys/types.h>
#include <mach/vm_param.h>
+#include <machine/machine_routines.h>
#include <pexpert/protos.h>
#include <pexpert/pexpert.h>
#include <pexpert/boot.h>
#include <pexpert/device_tree.h>
#include <pexpert/pe_images.h>
#include <kern/sched_prim.h>
+#include <kern/debug.h>
+
+#if CONFIG_CSR
+#include <sys/csr.h>
+#endif
-#include "fakePPCStructs.h"
-#include "fakePPCDeviceTree.h"
#include "boot_images.h"
/* extern references */
extern void pe_identify_machine(void * args);
-extern void initialize_screen(void *, unsigned int);
-
-/* Local references */
-static int PE_fb_mode = TEXT_MODE;
-
+extern int kdb_printf(const char *format, ...) __printflike(1, 2);
/* private globals */
PE_state_t PE_state;
-dt_data gMemoryMapNode;
-dt_data gDriversProp;
-dt_data gRootpathProp;
-dt_data gCompatibleProp;
/* Clock Frequency Info */
clock_frequency_info_t gPEClockFrequencyInfo;
-int PE_initialize_console( PE_Video * info, int op )
+void *gPEEFISystemTable;
+void *gPEEFIRuntimeServices;
+
+static boot_icon_element* norootIcon_lzss;
+static const uint8_t* norootClut_lzss;
+
+int
+PE_initialize_console( PE_Video * info, int op )
{
- static int last_console = -1;
- Boot_Video bootInfo;
- Boot_Video * bInfo;
-
- /*
- * Refuse changes from outside pexpert.
- * The video mode setup by the booter cannot be changed.
- */
- if ( info )
- {
- bootInfo.v_baseAddr = info->v_baseAddr;
- bootInfo.v_rowBytes = info->v_rowBytes;
- bootInfo.v_width = info->v_width;
- bootInfo.v_height = info->v_height;
- bootInfo.v_depth = info->v_depth;
- bInfo = &bootInfo;
- if (info == &PE_state.video) {
- bootInfo.v_display = PE_fb_mode;
- } else {
- bootInfo.v_display = GRAPHICS_MODE;
- }
- }
- else
- bInfo = 0;
-
- switch ( op ) {
-
- case kPEDisableScreen:
- initialize_screen((void *) bInfo, op);
-#ifdef FIXME
- last_console = switch_to_serial_console();
-#endif
- kprintf("kPEDisableScreen %d\n", last_console);
- break;
-
- case kPEEnableScreen:
- initialize_screen((void *) bInfo, op);
- kprintf("kPEEnableScreen %d\n", last_console);
-#ifdef FIXME
- if( last_console != -1)
- switch_to_old_console( last_console);
-#endif
- break;
-
- default:
- initialize_screen((void *) bInfo, op);
- break;
- }
-
- return 0;
+ static int last_console = -1;
+
+ if (info) {
+ info->v_offset = 0;
+ info->v_length = 0;
+ info->v_display = GRAPHICS_MODE;
+ }
+
+ switch (op) {
+ case kPEDisableScreen:
+ initialize_screen(info, op);
+ kprintf("kPEDisableScreen %d\n", last_console);
+ if (!console_is_serial()) {
+ last_console = switch_to_serial_console();
+ }
+ break;
+
+ case kPEEnableScreen:
+ initialize_screen(info, op);
+ if (info) {
+ PE_state.video = *info;
+ }
+ kprintf("kPEEnableScreen %d\n", last_console);
+ if (last_console != -1) {
+ switch_to_old_console( last_console);
+ }
+ break;
+
+ case kPEBaseAddressChange:
+ if (info) {
+ PE_state.video = *info;
+ }
+ OS_FALLTHROUGH;
+
+ default:
+ initialize_screen(info, op);
+ break;
+ }
+
+ return 0;
}
-void PE_init_iokit(void)
+void
+PE_init_iokit(void)
{
- long * dt;
- int i;
- KernelBootArgs_t *kap = (KernelBootArgs_t *)PE_state.bootArgs;
- enum { kMaxBootVar = 128 };
- char *rdValue, *platformValue;
-
- typedef struct {
- char name[32];
- unsigned long length;
- unsigned long value[2];
- } DriversPackageProp;
-
- PE_init_kprintf(TRUE);
- PE_init_printf(TRUE);
-
- /*
- * Update the fake device tree with the driver information provided by
- * the booter.
- */
-
- gDriversProp.length = kap->numBootDrivers * sizeof(DriversPackageProp);
- gMemoryMapNode.length = 2 * sizeof(long);
-
- rdValue = kalloc(kMaxBootVar);
- if ( PE_parse_boot_arg("rd", rdValue) ) {
- if (*rdValue == '*') {
- gRootpathProp.address = (rdValue + 1);
- } else {
- gRootpathProp.address = rdValue;
- }
- strcat(rdValue, ",");
- } else {
- gRootpathProp.address = rdValue;
- rdValue[0] = '\0';
- }
- strcat(rdValue, kap->bootFile);
- gRootpathProp.length = strlen(rdValue) + 1;
-
- platformValue = kalloc(kMaxBootVar);
- if ( ! PE_parse_boot_arg("platform", platformValue) ) {
- strcpy(platformValue, kDefaultPlatformName);
- }
- gCompatibleProp.address = platformValue;
- gCompatibleProp.length = strlen(platformValue) + 1;
-
- dt = (long *) createdt( fakePPCDeviceTree,
- &((boot_args*)PE_state.fakePPCBootArgs)->deviceTreeLength );
-
- kfree(rdValue, kMaxBootVar);
- kfree(platformValue, kMaxBootVar);
-
-
- if ( dt )
- {
- DriversPackageProp * prop = (DriversPackageProp *) gDriversProp.address;
-
- /* Copy driver info in kernBootStruct to fake device tree */
-
- for ( i = 0; i < kap->numBootDrivers; i++, prop++ )
- {
- switch ( kap->driverConfig[i].type )
- {
- case kBootDriverTypeKEXT:
- sprintf(prop->name, "Driver-%lx", kap->driverConfig[i].address);
- break;
-
- case kBootDriverTypeMKEXT:
- sprintf(prop->name, "DriversPackage-%lx", kap->driverConfig[i].address);
- break;
-
- default:
- sprintf(prop->name, "DriverBogus-%lx", kap->driverConfig[i].address);
- break;
- }
- prop->length = sizeof(prop->value);
- prop->value[0] = kap->driverConfig[i].address;
- prop->value[1] = kap->driverConfig[i].size;
- }
-
- *((long *)gMemoryMapNode.address) = kap->numBootDrivers + 1;
- }
-
- /* Setup powermac_info and powermac_machine_info structures */
-
- ((boot_args*)PE_state.fakePPCBootArgs)->deviceTreeP = (unsigned long *) dt;
- ((boot_args*)PE_state.fakePPCBootArgs)->topOfKernelData = (unsigned long) kalloc(0x2000);
-
- /*
- * Setup the OpenFirmware Device Tree routines
- * so the console can be found and the right I/O space
- * can be used..
- */
- DTInit(dt);
-
- /*
- * Fetch the CLUT and the noroot image.
- */
- bcopy( (void *) (uintptr_t) bootClut, (void *) appleClut8, sizeof(appleClut8) );
-
- default_noroot.width = kFailedBootWidth;
- default_noroot.height = kFailedBootHeight;
- default_noroot.dx = 0;
- default_noroot.dy = kFailedBootOffset;
- default_noroot_data = failedBootPict;
-
- /*
- * Initialize the panic UI
- */
- panic_ui_initialize( (unsigned char *) appleClut8 );
-
- /*
- * Initialize the spinning wheel (progress indicator).
- */
- vc_progress_initialize( &default_progress, default_progress_data,
- (unsigned char *) appleClut8 );
-
- (void) StartIOKit( (void*)dt, PE_state.bootArgs, 0, 0);
+ enum { kMaxBootVar = 128 };
+
+ boolean_t bootClutInitialized = FALSE;
+ boolean_t noroot_rle_Initialized = FALSE;
+
+ DTEntry entry;
+ unsigned int size;
+ uint32_t const *map;
+ boot_progress_element *bootPict;
+
+ norootIcon_lzss = NULL;
+ norootClut_lzss = NULL;
+
+ PE_init_printf(TRUE);
+
+ kprintf("Kernel boot args: '%s'\n", PE_boot_args());
+
+ /*
+ * Fetch the CLUT and the noroot image.
+ */
+
+ if (kSuccess == SecureDTLookupEntry(NULL, "/chosen/memory-map", &entry)) {
+ if (kSuccess == SecureDTGetProperty(entry, "BootCLUT", (void const **) &map, &size)) {
+ if (sizeof(appleClut8) <= map[1]) {
+ bcopy((void *)ml_static_ptovirt(map[0]), appleClut8, sizeof(appleClut8));
+ bootClutInitialized = TRUE;
+ }
+ }
+
+ if (kSuccess == SecureDTGetProperty(entry, "Pict-FailedBoot", (void const **) &map, &size)) {
+ bootPict = (boot_progress_element *) ml_static_ptovirt(map[0]);
+ default_noroot.width = bootPict->width;
+ default_noroot.height = bootPict->height;
+ default_noroot.dx = 0;
+ default_noroot.dy = bootPict->yOffset;
+ default_noroot_data = &bootPict->data[0];
+ noroot_rle_Initialized = TRUE;
+ }
+
+ if (kSuccess == SecureDTGetProperty(entry, "FailedCLUT", (void const **) &map, &size)) {
+ norootClut_lzss = (uint8_t*) ml_static_ptovirt(map[0]);
+ }
+
+ if (kSuccess == SecureDTGetProperty(entry, "FailedImage", (void const **) &map, &size)) {
+ norootIcon_lzss = (boot_icon_element *) ml_static_ptovirt(map[0]);
+ if (norootClut_lzss == NULL) {
+ printf("ERROR: No FailedCLUT provided for noroot icon!\n");
+ }
+ }
+ }
+
+ if (!bootClutInitialized) {
+ bcopy((void *) (uintptr_t) bootClut, (void *) appleClut8, sizeof(appleClut8));
+ }
+
+ if (!noroot_rle_Initialized) {
+ default_noroot.width = kFailedBootWidth;
+ default_noroot.height = kFailedBootHeight;
+ default_noroot.dx = 0;
+ default_noroot.dy = kFailedBootOffset;
+ default_noroot_data = failedBootPict;
+ }
+
+ /*
+ * Initialize the spinning wheel (progress indicator).
+ */
+ vc_progress_initialize(&default_progress,
+ default_progress_data1x,
+ default_progress_data2x,
+ default_progress_data3x,
+ (unsigned char *) appleClut8);
+
+ /*
+ * x86 only minimally enforces lockdown in hardware. Additionally, some pre-lockdown functionality
+ * such as commpage initialization requires IOKit enumeration of CPUs, which is heavily entangled
+ * with the ACPI stack. Therefore, we start the IOKit matching process immediately on x86.
+ */
+ InitIOKit(PE_state.deviceTreeHead);
+ StartIOKitMatching();
}
-void PE_init_platform(boolean_t vm_initialized, void * args)
+void
+PE_lockdown_iokit(void)
{
- if (PE_state.initialized == FALSE)
- {
- KernelBootArgs_t *kap = (KernelBootArgs_t *) args;
-
- PE_state.initialized = TRUE;
- PE_state.bootArgs = args;
- PE_state.video.v_baseAddr = kap->video.v_baseAddr;
- PE_state.video.v_rowBytes = kap->video.v_rowBytes;
- PE_state.video.v_height = kap->video.v_height;
- PE_state.video.v_width = kap->video.v_width;
- PE_state.video.v_depth = kap->video.v_depth;
- PE_state.video.v_display = kap->video.v_display;
- PE_fb_mode = kap->graphicsMode;
- PE_state.fakePPCBootArgs = (boot_args *)&fakePPCBootArgs;
- ((boot_args *)PE_state.fakePPCBootArgs)->machineType = 386;
-
- if (PE_fb_mode == TEXT_MODE)
- {
- /* Force a text display if the booter did not setup a
- * VESA frame buffer.
- */
- PE_state.video.v_display = 0;
- }
- }
-
- if (!vm_initialized)
- {
- /* Hack! FIXME.. */
- outb(0x21, 0xff); /* Maskout all interrupts Pic1 */
- outb(0xa1, 0xff); /* Maskout all interrupts Pic2 */
-
- pe_identify_machine(args);
- }
- else
- {
- pe_init_debug();
- }
+ /* Ensure that at least the CPUs have been enumerated before moving forward. */
+ ml_wait_max_cpus();
}
-void PE_create_console( void )
+void
+PE_init_platform(boolean_t vm_initialized, void * _args)
{
- if ( PE_state.video.v_display )
- PE_initialize_console( &PE_state.video, kPEGraphicsMode );
- else
- PE_initialize_console( &PE_state.video, kPETextMode );
+ boot_args *args = (boot_args *)_args;
+
+ if (PE_state.initialized == FALSE) {
+ PE_state.initialized = TRUE;
+
+ // New EFI-style
+ PE_state.bootArgs = _args;
+ PE_state.deviceTreeHead = (void *) ml_static_ptovirt(args->deviceTreeP);
+ PE_state.deviceTreeSize = args->deviceTreeLength;
+ if (args->Video.v_baseAddr) {
+ PE_state.video.v_baseAddr = args->Video.v_baseAddr;// remains physical address
+ PE_state.video.v_rowBytes = args->Video.v_rowBytes;
+ PE_state.video.v_depth = args->Video.v_depth;
+ PE_state.video.v_display = args->Video.v_display;
+ PE_state.video.v_rotate = args->Video.v_rotate;
+
+ /* EFI doesn't have a good way of describing rotation internally,
+ * so it flips width and height in portrait mode. We flip it back. */
+ if (PE_state.video.v_rotate == kDataRotate90 ||
+ PE_state.video.v_rotate == kDataRotate270) {
+ PE_state.video.v_width = args->Video.v_height;
+ PE_state.video.v_height = args->Video.v_width;
+ } else {
+ PE_state.video.v_width = args->Video.v_width;
+ PE_state.video.v_height = args->Video.v_height;
+ }
+
+ strlcpy(PE_state.video.v_pixelFormat, "PPPPPPPP",
+ sizeof(PE_state.video.v_pixelFormat));
+ } else {
+ PE_state.video.v_baseAddr = args->VideoV1.v_baseAddr;// remains physical address
+ PE_state.video.v_rowBytes = args->VideoV1.v_rowBytes;
+ PE_state.video.v_width = args->VideoV1.v_width;
+ PE_state.video.v_height = args->VideoV1.v_height;
+ PE_state.video.v_depth = args->VideoV1.v_depth;
+ PE_state.video.v_display = args->VideoV1.v_display;
+ PE_state.video.v_rotate = kDataRotate0; /* no room for rotation info */
+ strlcpy(PE_state.video.v_pixelFormat, "PPPPPPPP",
+ sizeof(PE_state.video.v_pixelFormat));
+ }
+
+#ifdef kBootArgsFlagHiDPI
+ if (args->flags & kBootArgsFlagHiDPI) {
+ PE_state.video.v_scale = kPEScaleFactor2x;
+ } else {
+ PE_state.video.v_scale = kPEScaleFactor1x;
+ }
+#else
+ PE_state.video.v_scale = kPEScaleFactor1x;
+#endif
+ }
+
+ if (!vm_initialized) {
+ if (PE_state.deviceTreeHead) {
+ SecureDTInit(PE_state.deviceTreeHead, PE_state.deviceTreeSize);
+ }
+
+ pe_identify_machine(args);
+ pe_init_debug();
+ }
}
-int PE_current_console( PE_Video * info )
+void
+PE_create_console( void )
{
- *info = PE_state.video;
-
- if ( PE_fb_mode == TEXT_MODE )
- {
- /*
- * FIXME: Prevent the IOBootFrameBuffer from starting up
- * when we are in Text mode.
- */
- info->v_baseAddr = 0;
-
- /*
- * Scale the size of the text screen from characters
- * to pixels.
- */
- info->v_width *= 8; // CHARWIDTH
- info->v_height *= 16; // CHARHEIGHT
- }
-
- return (0);
+ if (PE_state.video.v_display == GRAPHICS_MODE) {
+ PE_initialize_console( &PE_state.video, kPEGraphicsMode );
+ } else {
+ PE_initialize_console( &PE_state.video, kPETextMode );
+ }
}
-void PE_display_icon( __unused unsigned int flags, __unused const char * name )
+int
+PE_current_console( PE_Video * info )
{
- if ( default_noroot_data )
- vc_display_icon( &default_noroot, default_noroot_data );
+ *info = PE_state.video;
+
+ return 0;
+}
+
+void
+PE_display_icon( __unused unsigned int flags, __unused const char * name )
+{
+ if (norootIcon_lzss && norootClut_lzss) {
+ uint32_t width = norootIcon_lzss->width;
+ uint32_t height = norootIcon_lzss->height;
+ uint32_t x = ((PE_state.video.v_width - width) / 2);
+ uint32_t y = ((PE_state.video.v_height - height) / 2) + norootIcon_lzss->y_offset_from_center;
+
+ vc_display_lzss_icon(x, y, width, height,
+ &norootIcon_lzss->data[0],
+ norootIcon_lzss->data_size,
+ norootClut_lzss);
+ } else if (default_noroot_data) {
+ vc_display_icon( &default_noroot, default_noroot_data );
+ } else {
+ printf("ERROR: No data found for noroot icon!\n");
+ }
}
-extern boolean_t PE_get_hotkey( __unused unsigned char key )
+boolean_t
+PE_get_hotkey(__unused unsigned char key)
{
- return (FALSE);
+ return FALSE;
}
static timebase_callback_func gTimebaseCallback;
-void PE_register_timebase_callback(timebase_callback_func callback)
+void
+PE_register_timebase_callback(timebase_callback_func callback)
{
- gTimebaseCallback = callback;
-
- PE_call_timebase_callback();
+ gTimebaseCallback = callback;
+
+ PE_call_timebase_callback();
}
-void PE_call_timebase_callback(void)
+void
+PE_call_timebase_callback(void)
{
- struct timebase_freq_t timebase_freq;
- unsigned long num, den, cnt;
-
- num = gPEClockFrequencyInfo.bus_clock_rate_num * gPEClockFrequencyInfo.bus_to_dec_rate_num;
- den = gPEClockFrequencyInfo.bus_clock_rate_den * gPEClockFrequencyInfo.bus_to_dec_rate_den;
-
- cnt = 2;
- while (cnt <= den) {
- if ((num % cnt) || (den % cnt)) {
- cnt++;
- continue;
- }
-
- num /= cnt;
- den /= cnt;
- }
-
- timebase_freq.timebase_num = num;
- timebase_freq.timebase_den = den;
-
- if (gTimebaseCallback) gTimebaseCallback(&timebase_freq);
+ struct timebase_freq_t timebase_freq;
+ unsigned long num, den, cnt;
+
+ num = gPEClockFrequencyInfo.bus_clock_rate_num * gPEClockFrequencyInfo.bus_to_dec_rate_num;
+ den = gPEClockFrequencyInfo.bus_clock_rate_den * gPEClockFrequencyInfo.bus_to_dec_rate_den;
+
+ cnt = 2;
+ while (cnt <= den) {
+ if ((num % cnt) || (den % cnt)) {
+ cnt++;
+ continue;
+ }
+
+ num /= cnt;
+ den /= cnt;
+ }
+
+ timebase_freq.timebase_num = num;
+ timebase_freq.timebase_den = den;
+
+ if (gTimebaseCallback) {
+ gTimebaseCallback(&timebase_freq);
+ }
}
/*
* The default (non-functional) PE_poll_input handler.
*/
-static int
+int
PE_stub_poll_input(__unused unsigned int options, char * c)
{
- *c = 0xff;
- return 1; /* 0 for success, 1 for unsupported */
+ *c = 0xff;
+ return 1; /* 0 for success, 1 for unsupported */
}
-/*
- * Called by the kernel debugger to poll for keyboard input.
- * Keyboard drivers may replace the default stub function
- * with their polled-mode input function.
- */
-int (*PE_poll_input)(unsigned int options, char * c)
- = PE_stub_poll_input;
+boolean_t
+PE_reboot_on_panic(void)
+{
+ boot_args *args = (boot_args *)PE_state.bootArgs;
+ if (args->flags & kBootArgsFlagRebootOnPanic) {
+ return TRUE;
+ } else {
+ return FALSE;
+ }
+}
+void
+PE_sync_panic_buffers(void)
+{
+}
+
+/* rdar://problem/21244753 */
+uint32_t
+PE_i_can_has_debugger(uint32_t *debug_flags)
+{
+#if DEVELOPMENT || DEBUG
+ if (debug_flags) {
+ assert(startup_phase >= STARTUP_SUB_TUNABLES);
+ }
+#endif
+#if CONFIG_CSR
+ if (csr_check(CSR_ALLOW_KERNEL_DEBUGGER) != 0) {
+ if (debug_flags) {
+ *debug_flags = 0;
+ }
+ return FALSE;
+ }
+#endif
+ if (debug_flags) {
+ *debug_flags = debug_boot_arg;
+ }
+ return TRUE;
+}
+
+uint32_t
+PE_get_offset_into_panic_region(char *location)
+{
+ assert(panic_info != NULL);
+ assert(location > (char *) panic_info);
+
+ return (uint32_t) (location - (char *) panic_info);
+}
+
+void
+PE_init_panicheader()
+{
+ bzero(panic_info, offsetof(struct macos_panic_header, mph_data));
+ panic_info->mph_panic_log_offset = PE_get_offset_into_panic_region(debug_buf_base);
+
+ panic_info->mph_magic = MACOS_PANIC_MAGIC;
+ panic_info->mph_version = MACOS_PANIC_HEADER_CURRENT_VERSION;
+
+ return;
+}
+
+/*
+ * Tries to update the panic header to keep it consistent on nested panics.
+ *
+ * NOTE: The purpose of this function is NOT to detect/correct corruption in the panic region,
+ * it is to update the panic header to make it consistent when we nest panics.
+ *
+ * We try to avoid nested panics/asserts on x86 because they are difficult to debug, so log any
+ * inconsistencies we find.
+ */
+void
+PE_update_panicheader_nestedpanic()
+{
+ /* If the panic log offset is not set, re-init the panic header */
+ if (panic_info->mph_panic_log_offset == 0) {
+ PE_init_panicheader();
+ panic_info->mph_panic_flags |= MACOS_PANIC_HEADER_FLAG_NESTED_PANIC;
+ return;
+ }
+
+ panic_info->mph_panic_flags |= MACOS_PANIC_HEADER_FLAG_NESTED_PANIC;
+
+ /* Usually indicative of corruption in the panic region */
+ if (!(((panic_info->mph_stackshot_offset == 0) && (panic_info->mph_stackshot_len == 0)) ||
+ ((panic_info->mph_stackshot_offset != 0) && (panic_info->mph_stackshot_len != 0)))) {
+ kdb_printf("panic_info contains invalid stackshot metadata: mph_stackshot_offset 0x%x mph_stackshot_len 0x%x\n",
+ panic_info->mph_stackshot_offset, panic_info->mph_stackshot_len);
+ }
+
+ /*
+ * macOS panic logs contain nested panic data, if we've already closed the panic log,
+ * begin the other log.
+ */
+ if ((panic_info->mph_panic_log_len != 0) && (panic_info->mph_other_log_offset == 0)) {
+ panic_info->mph_other_log_offset = PE_get_offset_into_panic_region(debug_buf_ptr);
+
+ /* Usually indicative of corruption in the panic region */
+ if (panic_info->mph_other_log_len != 0) {
+ kdb_printf("panic_info contains invalid other log metadata (zero offset but non-zero length), length was 0x%x, zeroing value\n",
+ panic_info->mph_other_log_len);
+ panic_info->mph_other_log_len = 0;
+ }
+ }
+
+ return;
+}
projects / apple / xnu.git / blobdiff