xnu-6153.61.1.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 4d7891ba4cc1a7f16ae64bec7c2c6cade28bfefe..1512e6b0c4abd615e933b768f67785aee36723e4 100644 (file)
--- a/bsd/dev/i386/kern_machdep.c
+++ b/bsd/dev/i386/kern_machdep.c
@@ -2,7 +2,7 @@
  * Copyright (c) 2000-2013 Apple Inc. All rights reserved.
  *
  * @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
@@ -11,10 +11,10 @@
  * 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
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
@@ -22,7 +22,7 @@
  * 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_OSREFERENCE_LICENSE_HEADER_END@
  */
 /*
@@ -34,28 +34,32 @@
  *     Machine-specific kernel routines.
  */
 
-#include       <sys/types.h>
-#include       <mach/machine.h>
-#include       <kern/cpu_number.h>
-#include       <machine/exec.h>
-#include       <machine/machine_routines.h>
+#include        <sys/types.h>
+#include        <mach/machine.h>
+#include        <kern/cpu_number.h>
+#include        <machine/exec.h>
+#include        <machine/machine_routines.h>
+
+#if __x86_64__
+extern int bootarg_no32exec;    /* bsd_init.c */
+#endif
 
 /**********************************************************************
- * Routine:    grade_binary()
- *
- * 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.
- **********************************************************************/
+* Routine:     grade_binary()
+*
+* 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)
+grade_binary(cpu_type_t exectype, cpu_subtype_t execsubtype, bool allow_simulator_binary __unused)
 {
        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 (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;
@@ -63,7 +67,7 @@ grade_binary(cpu_type_t exectype, cpu_subtype_t execsubtype)
                                return 2;
                        }
                        break;
-               case CPU_SUBTYPE_X86_ARCH1:     /* generic systems can only execute ALL subtype */
+               case CPU_SUBTYPE_X86_ARCH1:     /* generic systems can only execute ALL subtype */
                        switch (execsubtype) {
                        case CPU_SUBTYPE_X86_64_ALL:
                                return 2;
@@ -71,7 +75,12 @@ grade_binary(cpu_type_t exectype, cpu_subtype_t execsubtype)
                        break;
                }
                break;
-       case CPU_TYPE_X86:              /* native */
+       case CPU_TYPE_X86:              /* native */
+#if __x86_64__
+               if (bootarg_no32exec && !allow_simulator_binary) {
+                       return 0;
+               }
+#endif
                return 1;
        }