xnu-1456.1.26.tar.gz

[apple/xnu.git] / osfmk / i386 / gdt.c

diff --git a/osfmk/i386/gdt.c b/osfmk/i386/gdt.c
index 4150e7c0da0041bd98592ddfa7d5903e27331a6d..c3502e06be2f392ae91a86f075e907d2c32b8aed 100644 (file)
--- a/osfmk/i386/gdt.c
+++ b/osfmk/i386/gdt.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2009 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
@@ -60,67 +60,51 @@
 /*
  * Global descriptor table.
  */
-#include <mach/machine.h>
-#include <mach/i386/vm_param.h>
-#include <kern/thread.h>
-#include <i386/cpu_data.h>
-#include <i386/mp_desc.h>
+#include <i386/seg.h>
 
-struct fake_descriptor master_gdt[GDTSZ] __attribute__ ((aligned (4096))) = {
-       [SEL_TO_INDEX(KERNEL_CS)] {     /* kernel code */
+struct real_descriptor master_gdt[GDTSZ] __attribute__ ((section("__INITGDT,__data")))= {
+       [SEL_TO_INDEX(KERNEL32_CS)] MAKE_REAL_DESCRIPTOR(       /* kernel 32-bit code */ 
                0,
-                 0xfffff,
-                 SZ_32|SZ_G,
-               ACC_P|ACC_PL_K|ACC_CODE_R,
-       },
-       [SEL_TO_INDEX(KERNEL_DS)] {     /* kernel data */
+               0xfffff,
+               SZ_32|SZ_G,
+               ACC_P|ACC_PL_K|ACC_CODE_R
+       ),
+       [SEL_TO_INDEX(KERNEL_DS)] MAKE_REAL_DESCRIPTOR( /* kernel data */
                0,
-                 0xfffff,
-                 SZ_32|SZ_G,
-                 ACC_P|ACC_PL_K|ACC_DATA_W
-       },
-       [SEL_TO_INDEX(KERNEL_LDT)] {    /* local descriptor table */
-               (uint32_t) &master_ldt,
-                 LDTSZ_MIN*sizeof(struct fake_descriptor)-1,
-                 0,
-                 ACC_P|ACC_PL_K|ACC_LDT
-       },                              /* The slot KERNEL_LDT_2 is reserved. */
-       [SEL_TO_INDEX(KERNEL_TSS)] {    /* TSS for this processor */
-               (uint32_t) &master_ktss,
-                 sizeof(struct i386_tss)-1,
-                 0,
-                 ACC_P|ACC_PL_K|ACC_TSS
-       },                              /* The slot KERNEL_TSS_2 is reserved. */
-       [SEL_TO_INDEX(CPU_DATA_GS)] {   /* per-CPU current thread address */
-               (uint32_t) &cpu_data_master,
-                 sizeof(cpu_data_t)-1,
-                 SZ_32,
-                 ACC_P|ACC_PL_K|ACC_DATA_W
-       },
-       [SEL_TO_INDEX(USER_LDT)] {      /* user local descriptor table */
-               (uint32_t) &master_ldt,
-                 LDTSZ_MIN*sizeof(struct fake_descriptor)-1,
-                 0,
-                 ACC_P|ACC_PL_K|ACC_LDT
-       },
-       [SEL_TO_INDEX(KERNEL64_CS)] {   /* kernel 64-bit code */ 
+               0xfffff,
+               SZ_32|SZ_G,
+               ACC_P|ACC_PL_K|ACC_DATA_W
+       ),
+       [SEL_TO_INDEX(KERNEL64_CS)] MAKE_REAL_DESCRIPTOR(       /* kernel 64-bit code */ 
                0,
                0xfffff,
                SZ_64|SZ_G,
                ACC_P|ACC_PL_K|ACC_CODE_R
-       },
-       [SEL_TO_INDEX(KERNEL64_SS)] {   /* kernel 64-bit syscall stack */ 
+       ),
+       [SEL_TO_INDEX(KERNEL64_SS)] MAKE_REAL_DESCRIPTOR(       /* kernel 64-bit syscall stack */ 
                0,
                0xfffff,
                SZ_32|SZ_G,
                ACC_P|ACC_PL_K|ACC_DATA_W
-       },
-#if    MACH_KDB
-       [SEL_TO_INDEX(DEBUG_TSS)] {     /* TSS for this processor */
-               (uint32_t)&master_dbtss,
-                 sizeof(struct i386_tss)-1,
-                 0,
-                 ACC_P|ACC_PL_K|ACC_TSS
-       },
-#endif /* MACH_KDB */
+       ),
+#ifdef __x86_64__
+       [SEL_TO_INDEX(USER_CS)] MAKE_REAL_DESCRIPTOR(   /* 32-bit user code segment */
+               0,
+               0xfffff,
+               SZ_32|SZ_G,
+               ACC_P|ACC_PL_U|ACC_CODE_R
+       ),
+       [SEL_TO_INDEX(USER_DS)] MAKE_REAL_DESCRIPTOR(   /* 32-bit user data segment */
+               0,
+               0xfffff,
+               SZ_32|SZ_G,
+               ACC_P|ACC_PL_U|ACC_DATA_W
+       ),
+       [SEL_TO_INDEX(USER64_CS)] MAKE_REAL_DESCRIPTOR( /* user 64-bit code segment */
+               0,
+               0xfffff,
+               SZ_64|SZ_G,
+               ACC_P|ACC_PL_U|ACC_CODE_R
+       ),
+#endif
 };