db_machdep.h revision 621 
1/*
2 * Mach Operating System
3 * Copyright (c) 1991,1990 Carnegie Mellon University
4 * All Rights Reserved.
5 *
6 * Permission to use, copy, modify and distribute this software and its
7 * documentation is hereby granted, provided that both the copyright
8 * notice and this permission notice appear in all copies of the
9 * software, derivative works or modified versions, and any portions
10 * thereof, and that both notices appear in supporting documentation.
11 *
12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
13 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
15 *
16 * Carnegie Mellon requests users of this software to return to
17 *
18 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
19 *  School of Computer Science
20 *  Carnegie Mellon University
21 *  Pittsburgh PA 15213-3890
22 *
23 * any improvements or extensions that they make and grant Carnegie Mellon
24 * the rights to redistribute these changes.
25 *
26 *	$Id$
27 */
28
29#ifndef	_I386_DB_MACHDEP_H_
30#define	_I386_DB_MACHDEP_H_
31
32/*
33 * Machine-dependent defines for new kernel debugger.
34 */
35
36
37/* #include <mach/i386/vm_types.h> */
38/* #include <mach/i386/vm_param.h> */
39#include <vm/vm_prot.h>
40#include <vm/vm_param.h>
41#include <vm/vm_inherit.h>
42#include <vm/lock.h>
43/* #include <i386/thread.h> */		/* for thread_status */
44#include <machine/frame.h>	/* for struct trapframe */
45/* #include <i386/eflags.h> */
46#include <machine/eflags.h>		/* from Mach... */
47/* #include <i386/trap.h> */
48#include <machine/trap.h>
49
50#define i386_saved_state trapframe
51/* end of mangling */
52
53typedef	vm_offset_t	db_addr_t;	/* address - unsigned */
54typedef	int		db_expr_t;	/* expression - signed */
55
56typedef struct i386_saved_state db_regs_t;
57db_regs_t	ddb_regs;	/* register state */
58#define	DDB_REGS	(&ddb_regs)
59
60#define	PC_REGS(regs)	((db_addr_t)(regs)->tf_eip)
61
62#define	BKPT_INST	0xcc		/* breakpoint instruction */
63#define	BKPT_SIZE	(1)		/* size of breakpoint inst */
64#define	BKPT_SET(inst)	(BKPT_INST)
65
66#define	FIXUP_PC_AFTER_BREAK	ddb_regs.tf_eip -= 1;
67
68#define	db_clear_single_step(regs)	((regs)->tf_eflags &= ~EFL_TF)
69#define	db_set_single_step(regs)	((regs)->tf_eflags |=  EFL_TF)
70
71/* #define	IS_BREAKPOINT_TRAP(type, code)	((type) == T_INT3) */
72/* #define IS_WATCHPOINT_TRAP(type, code)	((type) == T_WATCHPOINT) */
73/* using the 386bsd values, rather than the Mach ones: */
74#define	IS_BREAKPOINT_TRAP(type, code)	((type) == T_BPTFLT)
75#define IS_WATCHPOINT_TRAP(type, code)	((type) == T_KDBTRAP)
76
77#define	I_CALL		0xe8
78#define	I_CALLI		0xff
79#define	I_RET		0xc3
80#define	I_IRET		0xcf
81
82#define	inst_trap_return(ins)	(((ins)&0xff) == I_IRET)
83#define	inst_return(ins)	(((ins)&0xff) == I_RET)
84#define	inst_call(ins)		(((ins)&0xff) == I_CALL || \
85				 (((ins)&0xff) == I_CALLI && \
86				  ((ins)&0x3800) == 0x1000))
87#define inst_load(ins)		0
88#define inst_store(ins)		0
89
90/* access capability and access macros */
91
92#define DB_ACCESS_LEVEL		2	/* access any space */
93#define DB_CHECK_ACCESS(addr,size,task)				\
94	db_check_access(addr,size,task)
95#define DB_PHYS_EQ(task1,addr1,task2,addr2)			\
96	db_phys_eq(task1,addr1,task2,addr2)
97#define DB_VALID_KERN_ADDR(addr)				\
98	((addr) >= VM_MIN_KERNEL_ADDRESS && 			\
99	 (addr) < VM_MAX_KERNEL_ADDRESS)
100#define DB_VALID_ADDRESS(addr,user)				\
101	((!(user) && DB_VALID_KERN_ADDR(addr)) ||		\
102	 ((user) && (addr) < VM_MIN_KERNEL_ADDRESS))
103
104boolean_t 	db_check_access(/* vm_offset_t, int, task_t */);
105boolean_t	db_phys_eq(/* task_t, vm_offset_t, task_t, vm_offset_t */);
106
107/* macros for printing OS server dependent task name */
108
109#define DB_TASK_NAME(task)	db_task_name(task)
110#define DB_TASK_NAME_TITLE	"COMMAND                "
111#define DB_TASK_NAME_LEN	23
112#define DB_NULL_TASK_NAME	"?                      "
113
114void		db_task_name(/* task_t */);
115
116/* macro for checking if a thread has used floating-point */
117
118#define db_thread_fp_used(thread)	((thread)->pcb->ims.ifps != 0)
119
120#endif	/* _I386_DB_MACHDEP_H_ */
121