db_machdep.h revision 3315 
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: db_machdep.h,v 1.4 1994/09/08 11:49:04 bde Exp $
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/* #include <mach/i386/vm_types.h> */
37/* #include <mach/i386/vm_param.h> */
38#include <vm/vm_prot.h>
39#include <vm/vm_param.h>
40#include <vm/vm_inherit.h>
41#include <vm/lock.h>
42/* #include <i386/thread.h> */		/* for thread_status */
43#include <machine/frame.h>		/* for struct trapframe */
44/* #include <i386/eflags.h> */
45#include <machine/psl.h>
46/* #include <i386/trap.h> */
47#include <machine/trap.h>
48
49#define i386_saved_state trapframe
50
51typedef	vm_offset_t	db_addr_t;	/* address - unsigned */
52typedef	int		db_expr_t;	/* expression - signed */
53
54typedef struct i386_saved_state db_regs_t;
55extern db_regs_t	ddb_regs;	/* register state */
56#define	DDB_REGS	(&ddb_regs)
57
58#define	PC_REGS(regs)	((regs)->tf_cs == 0x08 ? (db_addr_t)(regs)->tf_eip : 0)
59
60#define	BKPT_INST	0xcc		/* breakpoint instruction */
61#define	BKPT_SIZE	(1)		/* size of breakpoint inst */
62#define	BKPT_SET(inst)	(BKPT_INST)
63
64#define	FIXUP_PC_AFTER_BREAK	ddb_regs.tf_eip -= 1;
65
66#define	db_clear_single_step(regs)	((regs)->tf_eflags &= ~PSL_T)
67#define	db_set_single_step(regs)	((regs)->tf_eflags |=  PSL_T)
68
69/* #define	IS_BREAKPOINT_TRAP(type, code)	((type) == T_INT3) */
70/* #define IS_WATCHPOINT_TRAP(type, code)	((type) == T_WATCHPOINT) */
71/* using the FreeBSD values, rather than the Mach ones: */
72#define	IS_BREAKPOINT_TRAP(type, code)	((type) == T_BPTFLT)
73#define IS_WATCHPOINT_TRAP(type, code)	((type) == T_KDBTRAP)
74
75#define	I_CALL		0xe8
76#define	I_CALLI		0xff
77#define	I_RET		0xc3
78#define	I_IRET		0xcf
79
80#define	inst_trap_return(ins)	(((ins)&0xff) == I_IRET)
81#define	inst_return(ins)	(((ins)&0xff) == I_RET)
82#define	inst_call(ins)		(((ins)&0xff) == I_CALL || \
83				 (((ins)&0xff) == I_CALLI && \
84				  ((ins)&0x3800) == 0x1000))
85#define inst_load(ins)		0
86#define inst_store(ins)		0
87
88/* access capability and access macros */
89
90#define DB_ACCESS_LEVEL		2	/* access any space */
91#define DB_CHECK_ACCESS(addr,size,task)				\
92	db_check_access(addr,size,task)
93#define DB_PHYS_EQ(task1,addr1,task2,addr2)			\
94	db_phys_eq(task1,addr1,task2,addr2)
95#define DB_VALID_KERN_ADDR(addr)				\
96	((addr) >= VM_MIN_KERNEL_ADDRESS && 			\
97	 (addr) < VM_MAX_KERNEL_ADDRESS)
98#define DB_VALID_ADDRESS(addr,user)				\
99	((!(user) && DB_VALID_KERN_ADDR(addr)) ||		\
100	 ((user) && (addr) < VM_MIN_KERNEL_ADDRESS))
101
102boolean_t 	db_check_access(/* vm_offset_t, int, task_t */);
103boolean_t	db_phys_eq(/* task_t, vm_offset_t, task_t, vm_offset_t */);
104
105/* macros for printing OS server dependent task name */
106
107#define DB_TASK_NAME(task)	db_task_name(task)
108#define DB_TASK_NAME_TITLE	"COMMAND                "
109#define DB_TASK_NAME_LEN	23
110#define DB_NULL_TASK_NAME	"?                      "
111
112void		db_task_name(/* task_t */);
113
114/* macro for checking if a thread has used floating-point */
115
116#define db_thread_fp_used(thread)	((thread)->pcb->ims.ifps != 0)
117
118#endif	/* _I386_DB_MACHDEP_H_ */
119