xnu-792.18.15.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 7bdd46a3eba99badc5d9963f3477fb46055a93b2..125b62efcb4e976d88ddb55d687566bacaf2aef9 100644 (file)
--- a/bsd/dev/i386/kern_machdep.c
+++ b/bsd/dev/i386/kern_machdep.c
@@ -37,92 +37,27 @@
 #include       <sys/types.h>
 #include       <mach/machine.h>
 #include       <kern/cpu_number.h>
-
-extern int grade_binary(cpu_type_t exectype, cpu_subtype_t execsubtype);
+#include       <machine/exec.h>
+#include       <machine/machine_routines.h>
 
 /**********************************************************************
  * 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, 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() && execsubtype == CPU_SUBTYPE_X86_64_ALL) ? 2 : 0;
+       default:                        /* all other binary types */
                return 0;
        }
 }