xnu-4570.51.1.tar.gz

[apple/xnu.git] / osfmk / i386 / machine_task.c

diff --git a/osfmk/i386/machine_task.c b/osfmk/i386/machine_task.c
index 3c2d93ffd30fe4f4315abb342a0cf803117893f9..f1cd81ce4564d39dee9e81910be583b8db5c49d6 100644 (file)
--- a/osfmk/i386/machine_task.c
+++ b/osfmk/i386/machine_task.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000-2008 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2016 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
@@ -57,6 +57,11 @@
 #include <kern/task.h>
 #include <kern/thread.h>
 #include <i386/misc_protos.h>
+#include <i386/fpu.h>
+
+#if HYPERVISOR
+#include <kern/hv_support.h>
+#endif
 
 extern zone_t ids_zone;
 
@@ -84,7 +89,6 @@ machine_task_set_state(
                        copy_debug_state32(tstate, (x86_debug_state32_t*) task->task_debug, FALSE);
                        
                        return KERN_SUCCESS;
-                       break;
                }
                case x86_DEBUG_STATE64:
                {
@@ -103,7 +107,6 @@ machine_task_set_state(
                        copy_debug_state64(tstate, (x86_debug_state64_t*) task->task_debug, FALSE);
                        
                        return KERN_SUCCESS;            
-                       break;
                }
                case x86_DEBUG_STATE:
                {
@@ -139,13 +142,10 @@ machine_task_set_state(
                        } else {
                                return KERN_INVALID_ARGUMENT;
                        }
-
-                       break;
                }
                default:
                {
                        return KERN_INVALID_ARGUMENT;
-                       break;
                }
        }
 }
@@ -172,7 +172,6 @@ machine_task_get_state(task_t task,
                        } 
 
                        return KERN_SUCCESS;
-                       break;
                }
                case x86_DEBUG_STATE64:
                {
@@ -189,7 +188,6 @@ machine_task_get_state(task_t task,
                        } 
 
                        return KERN_SUCCESS;
-                       break;
                }
                case x86_DEBUG_STATE:
                {
@@ -219,12 +217,10 @@ machine_task_get_state(task_t task,
                        }
                        
                        return KERN_SUCCESS;
-                       break;
                }
                default:
                {
                        return KERN_INVALID_ARGUMENT;
-                       break;
                }
        }
 }
@@ -240,6 +236,13 @@ machine_task_terminate(task_t task)
                user_ldt_t user_ldt;
                void *task_debug;
 
+#if HYPERVISOR
+               if (task->hv_task_target) {
+                       hv_callbacks.task_destroy(task->hv_task_target);
+                       task->hv_task_target = NULL;
+               }
+#endif
+
                user_ldt = task->i386_ldt;
                if (user_ldt != 0) {
                        task->i386_ldt = 0;
@@ -280,3 +283,24 @@ machine_thread_inherit_taskwide(
 
        return KERN_SUCCESS;
 }
+
+void
+machine_task_init(task_t new_task,
+                 task_t parent_task,
+                 boolean_t inherit_memory)
+{
+       new_task->uexc_range_start = 0;
+       new_task->uexc_range_size = 0;
+       new_task->uexc_handler = 0;
+
+       new_task->i386_ldt = 0;
+
+       if (parent_task != TASK_NULL) {
+               if (inherit_memory && parent_task->i386_ldt)
+                       new_task->i386_ldt = user_ldt_copy(parent_task->i386_ldt);
+               new_task->xstate = parent_task->xstate;
+       } else {
+               assert(fpu_default != UNDEFINED);
+               new_task->xstate = fpu_default;
+       }
+}