xnu-4903.241.1.tar.gz

[apple/xnu.git] / pexpert / i386 / pe_init.c

diff --git a/pexpert/i386/pe_init.c b/pexpert/i386/pe_init.c
index e154c7a784d676c46a46317ce664ee98e77254a9..49f9caecf02be7c05c8fb58e592bdefd24cb9173 100644 (file)
--- a/pexpert/i386/pe_init.c
+++ b/pexpert/i386/pe_init.c
@@ -41,11 +41,15 @@
 #include <kern/sched_prim.h>
 #include <kern/debug.h>
 
 #include <kern/sched_prim.h>
 #include <kern/debug.h>
 

+#if CONFIG_CSR
+#include <sys/csr.h>
+#endif
+

 #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 int kdb_printf(const char *format, ...) __printflike(1,2);

 /* private globals */
 PE_state_t  PE_state;
 
 /* private globals */
 PE_state_t  PE_state;
 


@@ -101,12 +105,6 @@ void PE_init_iokit(void)
 {
     enum { kMaxBootVar = 128 };
         
 {
     enum { kMaxBootVar = 128 };
         

-    typedef struct {
-        char            name[32];
-        unsigned long   length;
-        unsigned long   value[2];
-    } DriversPackageProp;
-

     boolean_t bootClutInitialized = FALSE;
     boolean_t noroot_rle_Initialized = FALSE;
 
     boolean_t bootClutInitialized = FALSE;
     boolean_t noroot_rle_Initialized = FALSE;
 


@@ -178,7 +176,7 @@ void PE_init_iokit(void)
                            default_progress_data3x, 
                            (unsigned char *) appleClut8);
 
                            default_progress_data3x, 
                            (unsigned char *) appleClut8);
 

-    (void) StartIOKit( PE_state.deviceTreeHead, PE_state.bootArgs, gPEEFIRuntimeServices, NULL);
+    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)


@@ -191,14 +189,25 @@ void PE_init_platform(boolean_t vm_initialized, void * _args)
         // New EFI-style
         PE_state.bootArgs           = _args;
         PE_state.deviceTreeHead            = (void *) ml_static_ptovirt(args->deviceTreeP);
         // New EFI-style
         PE_state.bootArgs           = _args;
         PE_state.deviceTreeHead            = (void *) ml_static_ptovirt(args->deviceTreeP);

-        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));
+        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)
 
 #ifdef  kBootArgsFlagHiDPI
        if (args->flags & kBootArgsFlagHiDPI)


@@ -217,7 +226,6 @@ void PE_init_platform(boolean_t vm_initialized, void * _args)
         }
 
         pe_identify_machine(args);
         }
 
         pe_identify_machine(args);

-    } else {

         pe_init_debug();
     }
 
         pe_init_debug();
     }
 


@@ -326,3 +334,98 @@ PE_reboot_on_panic(void)
        else
                return FALSE;
 }
        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;
+}