xnu-3248.20.55.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 125b62efcb4e976d88ddb55d687566bacaf2aef9..4d7891ba4cc1a7f16ae64bec7c2c6cade28bfefe 100644 (file)
--- a/bsd/dev/i386/kern_machdep.c
+++ b/bsd/dev/i386/kern_machdep.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2013 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
@@ -43,31 +43,43 @@
 /**********************************************************************
  * 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;
        }
-}
 
-extern void md_prepare_for_shutdown(int, int, char *);
+       return 0;
+}
 
-void
-md_prepare_for_shutdown(
-       __unused int paniced,
-       __unused int howto,
-       __unused char * command)
+boolean_t
+pie_required(cpu_type_t exectype __unused, cpu_subtype_t execsubtype __unused)
 {
+       return FALSE;
 }