/*
- * 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.
- *
- * 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.
- *
- * @APPLE_LICENSE_HEADER_END@
+ *
+ * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
*/
/*
* @OSF_COPYRIGHT@
#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
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 *)¤t_gdt()[sel_idx(sel)])
+#define ldt_desc_p(sel) \
+ ((struct real_descriptor *)¤t_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_ */
projects / apple / xnu.git / blobdiff