/* * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. * * @APPLE_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 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@ */ /* * @OSF_COPYRIGHT@ */ /* * Mach Operating System * Copyright (c) 1991,1990,1989 Carnegie Mellon University * All Rights Reserved. * * Permission to use, copy, modify and distribute this software and its * documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie Mellon * the rights to redistribute these changes. */ /* */ /* * File: machine/thread.h * * This file contains the structure definitions for the thread * state as applied to I386 processors. */ #ifndef _I386_THREAD_H_ #define _I386_THREAD_H_ #include <mach/boolean.h> #include <mach/i386/vm_types.h> #include <mach/i386/fp_reg.h> #include <kern/lock.h> #include <i386/iopb.h> #include <i386/seg.h> #include <i386/tss.h> #include <i386/eflags.h> #include <i386/thread_act.h> /* * i386_exception_link: * * This structure lives at the high end of the kernel stack. * It points to the current thread`s user registers. */ struct i386_exception_link { struct i386_saved_state *saved_state; }; /* * On the kernel stack is: * stack: ... * struct i386_exception_link * struct i386_kernel_state * stack+KERNEL_STACK_SIZE */ #define STACK_IKS(stack) \ ((struct i386_kernel_state *)((stack) + KERNEL_STACK_SIZE) - 1) #define STACK_IEL(stack) \ ((struct i386_exception_link *)STACK_IKS(stack) - 1) #if NCPUS > 1 #include <i386/mp_desc.h> #endif /* * Boot-time data for master (or only) CPU */ extern struct fake_descriptor idt[IDTSZ]; extern struct fake_descriptor gdt[GDTSZ]; extern struct fake_descriptor ldt[LDTSZ]; extern struct i386_tss ktss; #if MACH_KDB extern char db_stack_store[]; extern char db_task_stack_store[]; extern struct i386_tss dbtss; extern void db_task_start(void); #endif /* MACH_KDB */ #if NCPUS > 1 #define curr_gdt(mycpu) (mp_gdt[mycpu]) #define curr_ktss(mycpu) (mp_ktss[mycpu]) #else #define curr_gdt(mycpu) (gdt) #define curr_ktss(mycpu) (&ktss) #endif #define gdt_desc_p(mycpu,sel) \ ((struct real_descriptor *)&curr_gdt(mycpu)[sel_idx(sel)]) /* * Return address of the function that called current function, given * address of the first parameter of current function. */ #define GET_RETURN_PC(addr) (*((vm_offset_t *)addr - 1)) /* * Defining this indicates that MD code will supply an exception() * routine, conformant with kern/exception.c (dependency alert!) * but which does wonderfully fast, machine-dependent magic. */ #define MACHINE_FAST_EXCEPTION 1 /* * MD Macro to fill up global stack state, * keeping the MD structure sizes + games private */ #define MACHINE_STACK_STASH(stack) \ MACRO_BEGIN \ mp_disable_preemption(); \ kernel_stack[cpu_number()] = (stack) + \ (KERNEL_STACK_SIZE - sizeof (struct i386_exception_link) \ - sizeof (struct i386_kernel_state)), \ active_stacks[cpu_number()] = (stack); \ mp_enable_preemption(); \ MACRO_END #endif /* _I386_THREAD_H_ */