X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/378393581903b274cb7a4d18e0d978071a6b592d..e2fac8b15b12a7979f72090454d850e612fc5b13:/osfmk/i386/ktss.c diff --git a/osfmk/i386/ktss.c b/osfmk/i386/ktss.c index 23a39df8f..f0b69591c 100644 --- 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, - * 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@ @@ -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. - * - * XXX multiprocessor?? */ #include #include #include -struct i386_tss ktss = { +struct i386_tss master_ktss + __attribute__ ((section ("__DESC, master_ktss"))) + __attribute__ ((aligned (4096))) = { 0, /* back link */ 0, /* esp0 */ KERNEL_DS, /* ss0 */ @@ -94,9 +100,102 @@ struct i386_tss ktss = { so no bitmap */ }; +/* + * 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 }; + +#ifdef X86_64 +struct x86_64_tss master_ktss64 __attribute__ ((aligned (4096))) = { + .io_bit_map_offset = 0x0FFF, +}; +#endif /* X86_64 */ + +/* + * Task structure for double-fault handler: + */ +struct i386_tss master_dftss + __attribute__ ((section ("__DESC, master_dftss"))) + __attribute__ ((aligned (4096))) = { + 0, /* back link */ + (int) &df_task_stack_end - 4, /* esp0 */ + KERNEL_DS, /* ss0 */ + 0, /* esp1 */ + 0, /* ss1 */ + 0, /* esp2 */ + 0, /* ss2 */ + 0, /* cr3 */ + (int) &df_task_start, /* eip */ + 0, /* eflags */ + 0, /* eax */ + 0, /* ecx */ + 0, /* edx */ + 0, /* ebx */ + (int) &df_task_stack_end - 4, /* esp */ + 0, /* ebp */ + 0, /* esi */ + 0, /* edi */ + KERNEL_DS, /* es */ + KERNEL_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 */ + 0, /* 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 */ + 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 */ +}; + #if MACH_KDB -struct i386_tss dbtss = { +struct i386_tss master_dbtss + __attribute__ ((section ("__DESC, master_dbtss"))) + __attribute__ ((aligned (4096))) = { 0, /* back link */ 0, /* esp0 */ KERNEL_DS, /* ss0 */