xnu-2050.22.13.tar.gz

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

diff --git a/osfmk/i386/ldt.c b/osfmk/i386/ldt.c
index e2d0ee1c213e740284e2cfc6ede339ce2bb9bc67..ff1facd343d614586f4012390dd438f5d45c126b 100644 (file)
--- a/osfmk/i386/ldt.c
+++ b/osfmk/i386/ldt.c
@@ -57,54 +57,49 @@
  */
 
 /*
- * "Local" descriptor table.  At the moment, all tasks use the
+ * "Local" descriptor table. At the moment, all tasks use the
  * same LDT.
  */
 #include <i386/seg.h>
-#include <i386/pmap.h>
-#include <mach/i386/vm_types.h>
-#include <mach/i386/vm_param.h>
 
-extern int     syscall(void);
-extern int     mach_rpc(void);
-
-struct fake_descriptor ldt[LDTSZ] = {
-/*007*/        { (unsigned int)&syscall,
-         KERNEL_CS,
-         0,                            /* no parameters */
-         ACC_P|ACC_PL_U|ACC_CALL_GATE
-       },                              /* call gate for system calls */
-/*00F*/        { (unsigned int)&mach_rpc,
-          KERNEL_CS,
-          0,                            /* no parameters */
-          ACC_P|ACC_PL_U|ACC_CALL_GATE
-        },                             /* call gate for mach rpc */
-/*017*/        { 0,
-         0xfffff,
-         SZ_32|SZ_G,
-         ACC_P|ACC_PL_U|ACC_CODE_R
-       },                              /* user code segment */
-/*01F*/        { 0,
-         0xfffff,
-         SZ_32|SZ_G,
-         ACC_P|ACC_PL_U|ACC_DATA_W
-       },                              /* user data segment */
-/*027*/        { 0,
-         0xfffff,
-         SZ_32|SZ_G,
-         ACC_P|ACC_PL_U|ACC_DATA_W
-       },                              /* user cthread segment */
-// Storage space for user ldt entries we will make room for 10 entries initially
-// as we will probably never need many more than that
-/*02F*/        { 0, 0, 0, 0},
-/*037*/        { 0, 0, 0, 0},
-/*03F*/        { 0, 0, 0, 0},
-/*047*/        { 0, 0, 0, 0},
-/*04F*/        { 0, 0, 0, 0},
-/*057*/        { 0, 0, 0, 0},
-/*05F*/        { 0, 0, 0, 0},
-/*067*/        { 0, 0, 0, 0},
-/*06F*/        { 0, 0, 0, 0},
-/*077*/        { 0, 0, 0, 0},
 
+struct real_descriptor master_ldt[LDTSZ] __attribute__ ((aligned (4096))) = {
+#ifdef __i386__
+       [SEL_TO_INDEX(SYSENTER_CS)] = MAKE_REAL_DESCRIPTOR(     /* kernel code (sysenter) */
+               0,
+               0xfffff,
+               SZ_32|SZ_G,
+               ACC_P|ACC_PL_K|ACC_CODE_R
+       ),
+       [SEL_TO_INDEX(SYSENTER_DS)] = MAKE_REAL_DESCRIPTOR(     /* kernel data (sysenter) */
+               0,
+               0xfffff,
+               SZ_32|SZ_G,
+               ACC_P|ACC_PL_K|ACC_DATA_W
+       ),
+       [SEL_TO_INDEX(USER_CS)] = MAKE_REAL_DESCRIPTOR( /* 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( /* 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
+       [SEL_TO_INDEX(USER_CTHREAD)] = MAKE_REAL_DESCRIPTOR(    /* user cthread segment */
+               0,
+               0xfffff,
+               SZ_32|SZ_G,
+               ACC_P|ACC_PL_U|ACC_DATA_W
+       ),
 };