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[apple/xnu.git] / osfmk / i386 / ktss.c
diff --git a/osfmk/i386/ktss.c b/osfmk/i386/ktss.c
index 23a39df8fcf00e160700c087056bd4be1c704a79..a0275828c9e6375d819817118d2a23b51583de05 100644 (file)
--- a/osfmk/i386/ktss.c
+++ b/osfmk/i386/ktss.c
@@ -1,23 +1,29 @@
 /*
 /*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
  *
  *
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_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 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.
  * 
  * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * 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,
  * 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.
+ * 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_OSREFERENCE_LICENSE_HEADER_END@
  */
 /*
  * @OSF_COPYRIGHT@
  */
 /*
  * @OSF_COPYRIGHT@
@@ -55,14 +61,14 @@
  *
  * We don't use the i386 task switch mechanism.  We need a TSS
  * only to hold the kernel stack pointer for the current thread.
  *
  * We don't use the i386 task switch mechanism.  We need a TSS
  * only to hold the kernel stack pointer for the current thread.
- *
- * XXX multiprocessor??
  */
 #include <i386/tss.h>
  */
 #include <i386/tss.h>
-#include <i386/seg.h>
-#include <mach_kdb.h>
+#include <i386/pmap.h>
 
 
-struct i386_tss        ktss = {
+#ifdef __i386__
+struct i386_tss        master_ktss
+       __attribute__ ((section ("__DESC, master_ktss")))
+       __attribute__ ((aligned (4096))) = {
        0,                              /* back link */
        0,                              /* esp0 */
        KERNEL_DS,                      /* ss0 */
        0,                              /* back link */
        0,                              /* esp0 */
        KERNEL_DS,                      /* ss0 */
@@ -93,34 +99,93 @@ struct i386_tss     ktss = {
                                           beyond end of TSS segment,
                                           so no bitmap */
 };
                                           beyond end of TSS segment,
                                           so no bitmap */
 };
+#endif
+
+/*
+ * The transient stack for sysenter.
+ * At its top is a 32-bit link to the PCB in legacy mode, 64-bit otherwise.
+ * NB: it also must be large enough to contain a interrupt stack frame
+ * due to a single-step trace trap at system call entry.
+ */
+struct sysenter_stack master_sstk
+       __attribute__ ((section ("__DESC, master_sstk")))
+       __attribute__ ((aligned (16)))  = { {0}, 0 };
 
 
-#if    MACH_KDB
+#ifdef X86_64
+struct x86_64_tss master_ktss64 __attribute__ ((aligned (4096))) = {
+       .io_bit_map_offset = 0x0FFF,
+};
+#endif /* X86_64 */
 
 
-struct i386_tss        dbtss = {
+#ifdef __i386__
+/*
+ * Task structure for double-fault handler:
+ */
+struct i386_tss        master_dftss
+       __attribute__ ((section ("__DESC, master_dftss")))
+       __attribute__ ((aligned (4096))) = {
        0,                              /* back link */
        0,                              /* back link */
-       0,                              /* esp0 */
+       (int) &df_task_stack_end - 4,   /* esp0 */
        KERNEL_DS,                      /* ss0 */
        0,                              /* esp1 */
        0,                              /* ss1 */
        0,                              /* esp2 */
        0,                              /* ss2 */
        KERNEL_DS,                      /* ss0 */
        0,                              /* esp1 */
        0,                              /* ss1 */
        0,                              /* esp2 */
        0,                              /* ss2 */
-       0,                              /* cr3 */
-       0,                              /* eip */
+       (int) IdlePDPT,                         /* cr3 */
+       (int) &df_task_start,           /* eip */
        0,                              /* eflags */
        0,                              /* eax */
        0,                              /* ecx */
        0,                              /* edx */
        0,                              /* ebx */
        0,                              /* eflags */
        0,                              /* eax */
        0,                              /* ecx */
        0,                              /* edx */
        0,                              /* ebx */
-       0,                              /* esp */
+       (int) &df_task_stack_end - 4,   /* esp */
+       0,                              /* ebp */
+       0,                              /* esi */
+       0,                              /* edi */
+       KERNEL_DS,                      /* es */
+       KERNEL32_CS,                    /* cs */
+       KERNEL_DS,                      /* ss */
+       KERNEL_DS,                      /* ds */
+       KERNEL_DS,                      /* fs */
+       CPU_DATA_GS,                    /* gs */
+       KERNEL_LDT,                     /* ldt */
+       0,                              /* trace_trap */
+       0x0FFF                          /* IO bitmap offset -
+                                          beyond end of TSS segment,
+                                          so no bitmap */
+};
+
+
+/*
+ * Task structure for machine_check handler:
+ */
+struct i386_tss        master_mctss
+       __attribute__ ((section ("__DESC, master_mctss")))
+       __attribute__ ((aligned (4096))) = {
+       0,                              /* back link */
+       (int) &mc_task_stack_end - 4,   /* esp0 */
+       KERNEL_DS,                      /* ss0 */
+       0,                              /* esp1 */
+       0,                              /* ss1 */
+       0,                              /* esp2 */
+       0,                              /* ss2 */
+       (int) IdlePDPT,                         /* cr3 */
+       (int) &mc_task_start,           /* eip */
+       0,                              /* eflags */
+       0,                              /* eax */
+       0,                              /* ecx */
+       0,                              /* edx */
+       0,                              /* ebx */
+       (int) &mc_task_stack_end - 4,   /* esp */
        0,                              /* ebp */
        0,                              /* esi */
        0,                              /* edi */
        KERNEL_DS,                      /* es */
        0,                              /* ebp */
        0,                              /* esi */
        0,                              /* edi */
        KERNEL_DS,                      /* es */
-       KERNEL_CS,                      /* cs */
+       KERNEL32_CS,                    /* cs */
        KERNEL_DS,                      /* ss */
        KERNEL_DS,                      /* ds */
        KERNEL_DS,                      /* fs */
        KERNEL_DS,                      /* ss */
        KERNEL_DS,                      /* ds */
        KERNEL_DS,                      /* fs */
-       KERNEL_DS,                      /* gs */
+       CPU_DATA_GS,                    /* gs */
        KERNEL_LDT,                     /* ldt */
        0,                              /* trace_trap */
        0x0FFF                          /* IO bitmap offset -
        KERNEL_LDT,                     /* ldt */
        0,                              /* trace_trap */
        0x0FFF                          /* IO bitmap offset -
@@ -128,4 +193,4 @@ struct i386_tss     dbtss = {
                                           so no bitmap */
 };
 
                                           so no bitmap */
 };
 
-#endif /* MACH_KDB */
+#endif /* __i386__ */
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