xnu-1486.2.11.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 f10b03c563b8031f933b7b96ce94ee2b8dc03a55..c77af1d8be5f5878f556b6ea92a67c649d68d7a2 100644 (file)
--- a/bsd/dev/i386/kern_machdep.c
+++ b/bsd/dev/i386/kern_machdep.c
@@ -1,14 +1,19 @@
 /*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
  *
- * @APPLE_LICENSE_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. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * 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
@@ -18,7 +23,7 @@
  * 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.
@@ -32,92 +37,29 @@
 #include       <sys/types.h>
 #include       <mach/machine.h>
 #include       <kern/cpu_number.h>
+#include       <machine/exec.h>
+#include       <machine/machine_routines.h>
 
-extern int grade_binary(cpu_type_t exectype, cpu_subtype_t execsubtype);
+extern int bootarg_no64exec;   /* bsd_init.c */
 
 /**********************************************************************
  * Routine:    grade_binary()
  *
- * Function:   Return a relative preference for exectypes and
- *             execsubtypes in fat executable files.  The higher the
- *             grade, the higher the preference.  A grade of 0 means
- *             not acceptable.
+ * 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.
  **********************************************************************/
 int
-grade_binary(__unused cpu_type_t exectype, cpu_subtype_t execsubtype)
+grade_binary(cpu_type_t exectype, __unused cpu_subtype_t execsubtype)
 {
-       int             cpusubtype = cpu_subtype();
-
-       switch (cpusubtype) {
-           case CPU_SUBTYPE_386:
-               switch (execsubtype) {
-                   case CPU_SUBTYPE_386:
-                       return 1;
-                   default:
-                       return 0;
-               }
-
-           case CPU_SUBTYPE_486:
-               switch (execsubtype) {
-                   case CPU_SUBTYPE_386:
-                       return 1;
-
-                   case CPU_SUBTYPE_486SX:
-                       return 2;
-
-                   case CPU_SUBTYPE_486:
-                       return 3;
-
-                   default:
-                       return 0;
-               }
-
-           case CPU_SUBTYPE_486SX:
-               switch (execsubtype) {
-                   case CPU_SUBTYPE_386:
-                       return 1;
-
-                   case CPU_SUBTYPE_486:
-                       return 2;
-
-                   case CPU_SUBTYPE_486SX:
-                       return 3;
-
-                   default:
-                       return 0;
-               }
-
-           case CPU_SUBTYPE_586:
-               switch (execsubtype) {
-                   case CPU_SUBTYPE_386:
-                       return 1;
-
-                   case CPU_SUBTYPE_486SX:
-                       return 2;
-
-                   case CPU_SUBTYPE_486:
-                       return 3;
-
-                   case CPU_SUBTYPE_586:
-                       return 4;
-
-                   default:
-                       return 0;
-               }
-
-           default:
-               if (    CPU_SUBTYPE_INTEL_MODEL(execsubtype) ==
-                       CPU_SUBTYPE_INTEL_MODEL_ALL) {
-                   if (        CPU_SUBTYPE_INTEL_FAMILY(cpusubtype) >=
-                               CPU_SUBTYPE_INTEL_FAMILY(execsubtype))
-                       return CPU_SUBTYPE_INTEL_FAMILY_MAX - 
-                           CPU_SUBTYPE_INTEL_FAMILY(cpusubtype) -
-                           CPU_SUBTYPE_INTEL_FAMILY(execsubtype);
-               }
-               else {
-                   if (        cpusubtype == execsubtype)
-                       return CPU_SUBTYPE_INTEL_FAMILY_MAX + 1;
-               }
+       switch(exectype) {
+       case CPU_TYPE_X86:              /* native */
+       case CPU_TYPE_POWERPC:          /* via translator */
+               return 1;
+       case CPU_TYPE_X86_64:           /* native 64-bit */
+               return ((ml_is64bit() && !bootarg_no64exec) ? 2 : 0);
+       default:                        /* all other binary types */
                return 0;
        }
 }