xnu-792.12.6.tar.gz

[apple/xnu.git] / osfmk / i386 / mp_desc.h

diff --git a/osfmk/i386/mp_desc.h b/osfmk/i386/mp_desc.h
index 29f2f26b9256a51f19e38fa16e66b3078f4f04d2..a5acba6bc49c26d3242ad88725d9b581bb9cd79e 100644 (file)
--- a/osfmk/i386/mp_desc.h
+++ b/osfmk/i386/mp_desc.h
@@ -1,26 +1,31 @@
 /*
 /*

- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.

  *
  *

- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_LICENSE_OSREFERENCE_HEADER_START@

  * 
  * 

- * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
- * 
- * 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
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
+ * 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 
+ * compliance with the License.  The rights granted to you under the 
+ * License may not be used to create, or enable the creation or 
+ * redistribution of, 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.
  * 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,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
+ *
+ * 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, 
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 
+ * 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.
  * limitations under the License.

- * 
- * @APPLE_LICENSE_HEADER_END@
+ *
+ * @APPLE_LICENSE_OSREFERENCE_HEADER_END@

  */
 /*
  * @OSF_COPYRIGHT@
  */
 /*
  * @OSF_COPYRIGHT@


@@ -57,8 +62,10 @@
 #ifndef        _I386_MP_DESC_H_
 #define        _I386_MP_DESC_H_
 
 #ifndef        _I386_MP_DESC_H_
 #define        _I386_MP_DESC_H_
 

-#include <cpus.h>

 #include <mach_kdb.h>
 #include <mach_kdb.h>

+#include <sys/cdefs.h>
+
+__BEGIN_DECLS

 
 /*
  * Multiprocessor i386/i486 systems use a separate copy of the
 
 /*
  * Multiprocessor i386/i486 systems use a separate copy of the


@@ -86,32 +93,85 @@ struct mp_desc_table {
        struct i386_tss         dbtss;
 };
 
        struct i386_tss         dbtss;
 };
 

-/*
- * They are pointed to by a per-processor array.
- */
-extern struct mp_desc_table    *mp_desc_table[NCPUS];
+#define        current_gdt()   (current_cpu_datap()->cpu_desc_index.cdi_gdt)
+#define        current_idt()   (current_cpu_datap()->cpu_desc_index.cdi_idt)
+#define        current_ldt()   (current_cpu_datap()->cpu_desc_index.cdi_ldt)
+#define        current_ktss()  (current_cpu_datap()->cpu_desc_index.cdi_ktss)
+#define        current_dbtss() (current_cpu_datap()->cpu_desc_index.cdi_dbtss)

 
 

-/*
- * The kernel TSS gets its own pointer.
- */
-extern struct i386_tss         *mp_ktss[NCPUS];
-#if    MACH_KDB
-extern struct i386_tss         *mp_dbtss[NCPUS];
-#endif /* MACH_KDB */
+#define        gdt_desc_p(sel) \
+       ((struct real_descriptor *)&current_gdt()[sel_idx(sel)])
+#define        ldt_desc_p(sel) \
+       ((struct real_descriptor *)&current_ldt()[sel_idx(sel)])

 
 

-/*
- * So does the GDT and IDT.
- */
-extern struct fake_descriptor  *mp_gdt[NCPUS];
-extern struct fake_descriptor  *mp_idt[NCPUS];
+extern void    mp_desc_init(cpu_data_t *cdp, boolean_t is_boot_cpu);

 
 

+static inline boolean_t
+valid_user_data_selector(uint16_t selector)
+{
+    sel_t      sel = selector_to_sel(selector);
+    
+    if (selector == 0)
+       return (TRUE);

 
 

-/*
- * Each CPU calls this routine to set up its descriptor tables.
- */
+    if (sel.ti == SEL_LDT)
+       return (TRUE);
+    else if (sel.index < GDTSZ) {
+       if ((gdt_desc_p(selector)->access & ACC_PL_U) == ACC_PL_U)
+           return (TRUE);
+    }
+               
+    return (FALSE);
+}
+
+static inline boolean_t
+valid_user_code_selector(uint16_t selector)
+{
+    sel_t      sel = selector_to_sel(selector);
+    
+    if (selector == 0)
+       return (FALSE);
+
+    if (sel.ti == SEL_LDT) {
+       if (sel.rpl == USER_PRIV)
+           return (TRUE);
+    }
+    else if (sel.index < GDTSZ && sel.rpl == USER_PRIV) {
+       if ((gdt_desc_p(selector)->access & ACC_PL_U) == ACC_PL_U)
+           return (TRUE);
+    }
+
+    return (FALSE);
+}
+
+static inline boolean_t
+valid_user_stack_selector(uint16_t selector)
+{
+    sel_t      sel = selector_to_sel(selector);
+    
+    if (selector == 0)
+       return (FALSE);
+
+    if (sel.ti == SEL_LDT) {
+       if (sel.rpl == USER_PRIV)
+           return (TRUE);
+    }
+    else if (sel.index < GDTSZ && sel.rpl == USER_PRIV) {
+       if ((gdt_desc_p(selector)->access & ACC_PL_U) == ACC_PL_U)
+           return (TRUE);
+    }
+               
+    return (FALSE);
+}
+
+extern boolean_t
+valid_user_segment_selectors(uint16_t cs,
+                             uint16_t ss,
+                             uint16_t ds,
+                             uint16_t es,
+                             uint16_t fs,
+                             uint16_t gs);

 
 

-extern struct mp_desc_table *  mp_desc_init(
-                                       int             cpu);
-extern void                    interrupt_stack_alloc(void);
+__END_DECLS

 
 #endif /* _I386_MP_DESC_H_ */
 
 #endif /* _I386_MP_DESC_H_ */