X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/d7e50217d7adf6e52786a38bcaa4cd698cb9a79e..99c3a10404e5d1ef94397ab4df5a8b74711fc4d3:/osfmk/i386/ktss.c

diff --git a/osfmk/i386/ktss.c b/osfmk/i386/ktss.c
index b2236f355..a0275828c 100644
--- a/osfmk/i386/ktss.c
+++ b/osfmk/i386/ktss.c
@@ -1,16 +1,19 @@
 /*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
  *
- * @APPLE_LICENSE_HEADER_START@
- * 
- * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
  * 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
- * file.
+ * 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
@@ -20,7 +23,7 @@
  * 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@
@@ -58,14 +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.
- *
- * XXX multiprocessor??
  */
 #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 */
@@ -96,34 +99,93 @@ struct i386_tss	ktss = {
 					   beyond end of TSS segment,
 					   so no bitmap */
 };
+#endif
 
-#if	MACH_KDB
+/*
+ * 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 };
 
-struct i386_tss	dbtss = {
+#ifdef X86_64
+struct x86_64_tss master_ktss64 __attribute__ ((aligned (4096))) = {
+	.io_bit_map_offset = 0x0FFF,
+};
+#endif	/* X86_64 */
+
+#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,				/* esp0 */
+	(int) &df_task_stack_end - 4,	/* esp0 */
 	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,				/* 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 */
-	KERNEL_CS,			/* cs */
+	KERNEL32_CS,			/* cs */
 	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 -
@@ -131,4 +193,4 @@ struct i386_tss	dbtss = {
 					   so no bitmap */
 };
 
-#endif	/* MACH_KDB */
+#endif /* __i386__ */