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/*
* 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: thread_status.h
* Author: Avadis Tevanian, Jr.
* Date: 1985
*
* This file contains the structure definitions for the thread
* state as applied to I386 processors.
*/
#ifndef _MACH_I386_THREAD_STATUS_H_
#define _MACH_I386_THREAD_STATUS_H_
#include <mach/machine/fp_reg.h>
/*
* i386_thread_state this is the structure that is exported
* to user threads for use in status/mutate
* calls. This structure should never
* change.
*
* i386_float_state exported to use threads for access to
* floating point registers. Try not to
* change this one, either.
*
* i386_isa_port_map_state exported to user threads to allow
* selective in/out operations
*
*/
#define i386_THREAD_STATE 1
#define i386_FLOAT_STATE 2
#define i386_ISA_PORT_MAP_STATE 3
#define i386_V86_ASSIST_STATE 4
#define i386_REGS_SEGS_STATE 5
#define i386_DEBUG_STATE 6
/*
* This structure is used for both
* i386_THREAD_STATE and i386_REGS_SEGS_STATE.
*/
struct i386_thread_state {
unsigned int gs;
unsigned int fs;
unsigned int es;
unsigned int ds;
unsigned int edi;
unsigned int esi;
unsigned int ebp;
unsigned int esp;
unsigned int ebx;
unsigned int edx;
unsigned int ecx;
unsigned int eax;
unsigned int eip;
unsigned int cs;
unsigned int efl;
unsigned int uesp;
unsigned int ss;
};
#define i386_THREAD_STATE_COUNT (sizeof (struct i386_thread_state)/sizeof(unsigned int))
/*
* Floating point state.
*
* fpkind tells in what way floating point operations are supported.
* See the values for fp_kind in <mach/i386/fp_reg.h>.
*
* If the kind is FP_NO, then calls to set the state will fail, and
* thread_getstatus will return garbage for the rest of the state.
* If "initialized" is false, then the rest of the state is garbage.
* Clients can set "initialized" to false to force the coprocessor to
* be reset.
* "exc_status" is non-zero if the thread has noticed (but not
* proceeded from) a coprocessor exception. It contains the status
* word with the exception bits set. The status word in "fp_status"
* will have the exception bits turned off. If an exception bit in
* "fp_status" is turned on, then "exc_status" should be zero. This
* happens when the coprocessor exception is noticed after the system
* has context switched to some other thread.
*
* If kind is FP_387, then "state" is a i387_state. Other kinds might
* also use i387_state, but somebody will have to verify it (XXX).
* Note that the registers are ordered from top-of-stack down, not
* according to physical register number.
*/
#define FP_STATE_BYTES \
(sizeof (struct i386_fp_save) + sizeof (struct i386_fp_regs))
struct i386_float_state {
int fpkind; /* FP_NO..FP_387X (readonly) */
int initialized;
unsigned char hw_state[FP_STATE_BYTES]; /* actual "hardware" state */
int exc_status; /* exception status (readonly) */
};
#define i386_FLOAT_STATE_COUNT (sizeof(struct i386_float_state)/sizeof(unsigned int))
#define PORT_MAP_BITS 0x400
struct i386_isa_port_map_state {
unsigned char pm[PORT_MAP_BITS>>3];
};
#define i386_ISA_PORT_MAP_STATE_COUNT (sizeof(struct i386_isa_port_map_state)/sizeof(unsigned int))
/*
* V8086 assist supplies a pointer to an interrupt
* descriptor table in task space.
*/
struct i386_v86_assist_state {
unsigned int int_table; /* interrupt table address */
int int_count; /* interrupt table size */
};
struct v86_interrupt_table {
unsigned int count; /* count of pending interrupts */
unsigned short mask; /* ignore this interrupt if true */
unsigned short vec; /* vector to take */
};
#define i386_V86_ASSIST_STATE_COUNT \
(sizeof(struct i386_v86_assist_state)/sizeof(unsigned int))
struct i386_debug_state {
unsigned int dr[8];
};
#define i386_DEBUG_STATE_COUNT \
(sizeof(struct i386_debug_state)/sizeof(unsigned int))
#endif /* _MACH_I386_THREAD_STATUS_H_ */
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