X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/de355530ae67247cbd0da700edb3a2a1dae884c2..8ad349bb6ed4a0be06e34c92be0d98b92e078db4:/osfmk/i386/mp_desc.h

diff --git a/osfmk/i386/mp_desc.h b/osfmk/i386/mp_desc.h
index 9882f2ae3..a5acba6bc 100644
--- a/osfmk/i386/mp_desc.h
+++ b/osfmk/i386/mp_desc.h
@@ -1,23 +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@
  * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- * 
- * This 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 OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- * 
- * @APPLE_LICENSE_HEADER_END@
+ * 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.
+ *
+ * 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.
+ *
+ * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  */
 /*
  * @OSF_COPYRIGHT@
@@ -54,8 +62,10 @@
 #ifndef	_I386_MP_DESC_H_
 #define	_I386_MP_DESC_H_
 
-#include <cpus.h>
 #include <mach_kdb.h>
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
 
 /*
  * Multiprocessor i386/i486 systems use a separate copy of the
@@ -83,32 +93,85 @@ struct mp_desc_table {
 	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_ */