/* * 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@ */ #ifndef _I386_THREAD_ACT_H_ #define _I386_THREAD_ACT_H_ #include <mach/boolean.h> #include <mach/i386/vm_types.h> #include <mach/i386/fp_reg.h> #include <mach/thread_status.h> #include <kern/lock.h> #include <i386/iopb.h> #include <i386/tss.h> #include <i386/eflags.h> /* * i386_saved_state: * * Has been exported to servers. See: mach/i386/thread_status.h * * This structure corresponds to the state of user registers * as saved upon kernel entry. It lives in the pcb. * It is also pushed onto the stack for exceptions in the kernel. * For performance, it is also used directly in syscall exceptions * if the server has requested i386_THREAD_STATE flavor for the exception * port. * * We define the following as an alias for the "esp" field of the * structure, because we actually save cr2 here, not the kernel esp. */ #define cr2 esp /* * Save area for user floating-point state. * Allocated only when necessary. */ struct i386_fpsave_state { boolean_t fp_valid; struct i386_fp_save fp_save_state; struct i386_fp_regs fp_regs; }; /* * v86_assist_state: * * This structure provides data to simulate 8086 mode * interrupts. It lives in the pcb. */ struct v86_assist_state { vm_offset_t int_table; unsigned short int_count; unsigned short flags; /* 8086 flag bits */ }; #define V86_IF_PENDING 0x8000 /* unused bit */ /* * i386_interrupt_state: * * This structure describes the set of registers that must * be pushed on the current ring-0 stack by an interrupt before * we can switch to the interrupt stack. */ struct i386_interrupt_state { int es; int ds; int edx; int ecx; int eax; int eip; int cs; int efl; }; /* * i386_kernel_state: * * This structure corresponds to the state of kernel registers * as saved in a context-switch. It lives at the base of the stack. */ struct i386_kernel_state { int k_ebx; /* kernel context */ int k_esp; int k_ebp; int k_edi; int k_esi; int k_eip; }; /* * i386_machine_state: * * This structure corresponds to special machine state. * It lives in the pcb. It is not saved by default. */ struct i386_machine_state { iopb_tss_t io_tss; struct user_ldt * ldt; struct i386_fpsave_state *ifps; struct v86_assist_state v86s; }; typedef struct pcb { struct i386_interrupt_state iis[2]; /* interrupt and NMI */ struct i386_saved_state iss; struct i386_machine_state ims; #ifdef MACH_BSD unsigned long cthread_self; /* for use of cthread package */ #endif decl_simple_lock_data(,lock) } *pcb_t; /* * Maps state flavor to number of words in the state: */ extern unsigned int state_count[]; #define USER_REGS(ThrAct) (&(ThrAct)->mact.pcb->iss) #define act_machine_state_ptr(ThrAct) (thread_state_t)USER_REGS(ThrAct) #define is_user_thread(ThrAct) \ ((USER_REGS(ThrAct)->efl & EFL_VM) \ || ((USER_REGS(ThrAct)->cs & 0x03) != 0)) #define user_pc(ThrAct) (USER_REGS(ThrAct)->eip) #define user_sp(ThrAct) (USER_REGS(ThrAct)->uesp) #define syscall_emulation_sync(task) /* do nothing */ typedef struct MachineThrAct { /* * pointer to process control block * (actual storage may as well be here, too) */ struct pcb xxx_pcb; pcb_t pcb; } MachineThrAct, *MachineThrAct_t; extern void *act_thread_csave(void); extern void act_thread_catt(void *ctx); extern void act_thread_cfree(void *ctx); #endif /* _I386_THREAD_ACT_H_ */