xnu-2782.40.9.tar.gz

[apple/xnu.git] / bsd / dev / i386 / kern_machdep.c

diff --git a/bsd/dev/i386/kern_machdep.c b/bsd/dev/i386/kern_machdep.c
index 6ff80a540ca08d6183f7f49f85374b664a3c7c05..8627c26ba2d3bff6d2e0c12b8307921d5fe26d46 100644 (file)
--- a/bsd/dev/i386/kern_machdep.c
+++ b/bsd/dev/i386/kern_machdep.c
@@ -1,23 +1,29 @@
 /*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2013 Apple Inc. All rights reserved.
  *
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource 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.
  * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * 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 OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * 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_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 /*
  *     Copyright (C) 1990,  NeXT, Inc.
@@ -37,23 +43,39 @@
 /**********************************************************************
  * Routine:    grade_binary()
  *
- * Function:   Keep the API the same between PPC and X86; always say
- *             any CPU subtype is OK with us, but only OK CPU types
- *             for which we are actually capable of executing the
- *             binary, either directly or via an imputed interpreter.
+ * Function:   Say OK to CPU types that we can actually execute on the given
+ *             system. 64-bit binaries have the highest preference, followed
+ *             by 32-bit binaries. 0 means unsupported.
  **********************************************************************/
 int
 grade_binary(cpu_type_t exectype, cpu_subtype_t execsubtype)
 {
+       cpu_subtype_t hostsubtype = cpu_subtype();
+
        switch(exectype) {
+       case CPU_TYPE_X86_64:           /* native 64-bit */
+               switch(hostsubtype) {
+               case CPU_SUBTYPE_X86_64_H:      /* x86_64h can execute anything */
+                       switch (execsubtype) {
+                       case CPU_SUBTYPE_X86_64_H:
+                               return 3;
+                       case CPU_SUBTYPE_X86_64_ALL:
+                               return 2;
+                       }
+                       break;
+               case CPU_SUBTYPE_X86_ARCH1:     /* generic systems can only execute ALL subtype */
+                       switch (execsubtype) {
+                       case CPU_SUBTYPE_X86_64_ALL:
+                               return 2;
+                       }
+                       break;
+               }
+               break;
        case CPU_TYPE_X86:              /* native */
-       case CPU_TYPE_POWERPC:          /* via translator */
                return 1;
-       case CPU_TYPE_X86_64:           /* native 64-bit */
-               return (ml_is64bit() && execsubtype == CPU_SUBTYPE_X86_64_ALL) ? 2 : 0;
-       default:                        /* all other binary types */
-               return 0;
        }
+
+       return 0;
 }
 
 extern void md_prepare_for_shutdown(int, int, char *);
@@ -65,3 +87,9 @@ md_prepare_for_shutdown(
        __unused char * command)
 {
 }
+
+boolean_t
+pie_required(cpu_type_t exectype __unused, cpu_subtype_t execsubtype __unused)
+{
+       return FALSE;
+}