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[apple/xnu.git] / pexpert / i386 / pe_init.c
diff --git a/pexpert/i386/pe_init.c b/pexpert/i386/pe_init.c
index 4c22bf8e83ea7a4277627442cbcecc28d52d6761..49f9caecf02be7c05c8fb58e592bdefd24cb9173 100644 (file)
--- a/pexpert/i386/pe_init.c
+++ b/pexpert/i386/pe_init.c
@@ -1,114 +1,100 @@
 /*
 /*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
  *
  *
- * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
+ * @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 
- * 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 
- * 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 
+ * 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.
+ * 
+ * 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.
  * limitations under the License.
- *
- * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
+ * 
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 /*
  * file: pe_init.c
  *    i386 platform expert initialization.
  */
  */
 /*
  * file: pe_init.c
  *    i386 platform expert initialization.
  */
+
 #include <sys/types.h>
 #include <mach/vm_param.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 <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);
 #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;
 /* 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;
 
 
 /* Clock Frequency Info */
 clock_frequency_info_t gPEClockFrequencyInfo;
 
+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;
 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;
-        }
+    if (info) {
+       info->v_offset  = 0;
+       info->v_length  = 0;
+       info->v_display = GRAPHICS_MODE;
     }
     }
-    else
-        bInfo = 0;
 
     switch ( op ) {
 
         case kPEDisableScreen:
 
     switch ( op ) {
 
         case kPEDisableScreen:
-            initialize_screen((void *) bInfo, op);
-#ifdef FIXME
-            last_console = switch_to_serial_console();
-#endif
+            initialize_screen(info, op);
             kprintf("kPEDisableScreen %d\n", last_console);
             kprintf("kPEDisableScreen %d\n", last_console);
+           if (!console_is_serial())
+               last_console = switch_to_serial_console();
             break;
 
         case kPEEnableScreen:
             break;
 
         case kPEEnableScreen:
-            initialize_screen((void *) bInfo, op);
+            initialize_screen(info, op);
+            if (info) PE_state.video = *info;
             kprintf("kPEEnableScreen %d\n", last_console);
             kprintf("kPEEnableScreen %d\n", last_console);
-#ifdef FIXME
             if( last_console != -1)
                 switch_to_old_console( last_console);
             if( last_console != -1)
                 switch_to_old_console( last_console);
-#endif
             break;
        
             break;
        
+        case kPEBaseAddressChange:
+            if (info) PE_state.video = *info;
+            /* fall thru */
+
         default:
         default:
-            initialize_screen((void *) bInfo, op);
+            initialize_screen(info, op);
             break;
     }
 
             break;
     }
 
@@ -117,169 +103,137 @@ int PE_initialize_console( PE_Video * info, int op )
 
 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 };
     enum { kMaxBootVar = 128 };
-    char *rdValue, *platformValue;
         
         
-    typedef struct {
-        char            name[32];
-        unsigned long   length;
-        unsigned long   value[2];
-    } DriversPackageProp;
+    boolean_t bootClutInitialized = FALSE;
+    boolean_t noroot_rle_Initialized = FALSE;
+
+    DTEntry             entry;
+    unsigned int       size;
+    uint32_t           *map;
+       boot_progress_element *bootPict;
+
+    norootIcon_lzss = NULL;
+    norootClut_lzss = NULL;
 
     PE_init_kprintf(TRUE);
     PE_init_printf(TRUE);
 
 
     PE_init_kprintf(TRUE);
     PE_init_printf(TRUE);
 
+    kprintf("Kernel boot args: '%s'\n", PE_boot_args());
+
     /*
     /*
-     * Update the fake device tree with the driver information provided by
-     * the booter.
+     * Fetch the CLUT and the noroot image.
      */
 
      */
 
-    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;
+    if( kSuccess == DTLookupEntry(NULL, "/chosen/memory-map", &entry)) {
+        if( kSuccess == DTGetProperty(entry, "BootCLUT", (void **) &map, &size)) {
+            if (sizeof(appleClut8) <= map[1]) {
+                bcopy( (void *)ml_static_ptovirt(map[0]), appleClut8, sizeof(appleClut8) );
+                bootClutInitialized = TRUE;
+            }
         }
         }
-        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 */
+        if( kSuccess == DTGetProperty(entry, "Pict-FailedBoot", (void **) &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;
+        }
 
 
-        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;
+        if( kSuccess == DTGetProperty(entry, "FailedCLUT", (void **) &map, &size)) {
+               norootClut_lzss = (uint8_t*) ml_static_ptovirt(map[0]);
+        }
 
 
-                default:
-                    sprintf(prop->name, "DriverBogus-%lx", kap->driverConfig[i].address);
-                    break;
+        if( kSuccess == DTGetProperty(entry, "FailedImage", (void **) &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");
             }
             }
-            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) );
+    if (!bootClutInitialized) {
+        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;
+    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 panic UI
-     */
-    panic_ui_initialize( (unsigned char *) appleClut8 );
-
     /*
      * Initialize the spinning wheel (progress indicator).
      */
     /*
      * Initialize the spinning wheel (progress indicator).
      */
-    vc_progress_initialize( &default_progress, default_progress_data,
-                            (unsigned char *) appleClut8 );
+    vc_progress_initialize(&default_progress, 
+                           default_progress_data1x,
+                           default_progress_data2x, 
+                           default_progress_data3x, 
+                           (unsigned char *) appleClut8);
 
 
-    (void) StartIOKit( (void*)dt, PE_state.bootArgs, 0, 0);
+    StartIOKit( PE_state.deviceTreeHead, PE_state.bootArgs, gPEEFIRuntimeServices, NULL);
 }
 
 }
 
-void PE_init_platform(boolean_t vm_initialized, void * args)
+void PE_init_platform(boolean_t vm_initialized, void * _args)
 {
 {
-       if (PE_state.initialized == FALSE)
-       {
-           KernelBootArgs_t *kap = (KernelBootArgs_t *) args;
+    boot_args *args = (boot_args *)_args;
 
 
+    if (PE_state.initialized == FALSE) {
            PE_state.initialized        = TRUE;
            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;
+
+        // New EFI-style
+        PE_state.bootArgs           = _args;
+        PE_state.deviceTreeHead            = (void *) ml_static_ptovirt(args->deviceTreeP);
+        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_width         = args->Video.v_width;
+            PE_state.video.v_height        = args->Video.v_height;
+            PE_state.video.v_depth         = args->Video.v_depth;
+            PE_state.video.v_display    = args->Video.v_display;
+            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;
+            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)
-    {
-               /* Hack! FIXME.. */ 
-        outb(0x21, 0xff);   /* Maskout all interrupts Pic1 */
-        outb(0xa1, 0xff);   /* Maskout all interrupts Pic2 */
- 
+    if (!vm_initialized) {
+
+        if (PE_state.deviceTreeHead) {
+            DTInit(PE_state.deviceTreeHead);
+        }
+
         pe_identify_machine(args);
         pe_identify_machine(args);
-    }
-    else
-    {
         pe_init_debug();
     }
         pe_init_debug();
     }
+
 }
 
 void PE_create_console( void )
 {
 }
 
 void PE_create_console( void )
 {
-    if ( PE_state.video.v_display )
+    if ( PE_state.video.v_display == GRAPHICS_MODE )
         PE_initialize_console( &PE_state.video, kPEGraphicsMode );
     else
         PE_initialize_console( &PE_state.video, kPETextMode );
         PE_initialize_console( &PE_state.video, kPEGraphicsMode );
     else
         PE_initialize_console( &PE_state.video, kPETextMode );
@@ -289,32 +243,31 @@ int PE_current_console( PE_Video * info )
 {
     *info = PE_state.video;
 
 {
     *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);
 }
 
 void PE_display_icon( __unused unsigned int flags, __unused const char * name )
 {
     return (0);
 }
 
 void PE_display_icon( __unused unsigned int flags, __unused const char * name )
 {
-    if ( default_noroot_data )
+    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 );
         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);
 }
@@ -371,5 +324,108 @@ PE_stub_poll_input(__unused unsigned int options, char * c)
 int (*PE_poll_input)(unsigned int options, char * c)
        = PE_stub_poll_input;
 
 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(debug_boot_arg_inited);
+       }
+#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;
+}
mirror of XNU