Annotation of sys/arch/i386/include/db_machdep.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: db_machdep.h,v 1.17 2006/11/29 22:40:13 miod Exp $ */
2: /* $NetBSD: db_machdep.h,v 1.9 1996/05/03 19:23:59 christos Exp $ */
3:
4: /*
5: * Mach Operating System
6: * Copyright (c) 1991,1990 Carnegie Mellon University
7: * All Rights Reserved.
8: *
9: * Permission to use, copy, modify and distribute this software and its
10: * documentation is hereby granted, provided that both the copyright
11: * notice and this permission notice appear in all copies of the
12: * software, derivative works or modified versions, and any portions
13: * thereof, and that both notices appear in supporting documentation.
14: *
15: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
16: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
17: * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
18: *
19: * Carnegie Mellon requests users of this software to return to
20: *
21: * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
22: * School of Computer Science
23: * Carnegie Mellon University
24: * Pittsburgh PA 15213-3890
25: *
26: * any improvements or extensions that they make and grant Carnegie Mellon
27: * the rights to redistribute these changes.
28: */
29:
30: #ifndef _I386_DB_MACHDEP_H_
31: #define _I386_DB_MACHDEP_H_
32:
33: /*
34: * Machine-dependent defines for new kernel debugger.
35: */
36:
37: #include <sys/param.h>
38: #include <uvm/uvm_extern.h>
39: #include <machine/trap.h>
40:
41: typedef vaddr_t db_addr_t; /* address - unsigned */
42: typedef long db_expr_t; /* expression - signed */
43:
44: typedef struct trapframe db_regs_t;
45: extern db_regs_t ddb_regs; /* register state */
46: #define DDB_REGS (&ddb_regs)
47:
48: #define PC_REGS(regs) ((db_addr_t)(regs)->tf_eip)
49: #define SET_PC_REGS(regs, value) (regs)->tf_eip = (int)(value)
50:
51: #define BKPT_INST 0xcc /* breakpoint instruction */
52: #define BKPT_SIZE (1) /* size of breakpoint inst */
53: #define BKPT_SET(inst) (BKPT_INST)
54:
55: #define FIXUP_PC_AFTER_BREAK(regs) ((regs)->tf_eip -= BKPT_SIZE)
56:
57: #define db_clear_single_step(regs) ((regs)->tf_eflags &= ~PSL_T)
58: #define db_set_single_step(regs) ((regs)->tf_eflags |= PSL_T)
59:
60: #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BPTFLT)
61: #define IS_WATCHPOINT_TRAP(type, code) ((type) == T_TRCTRAP && (code) & 15)
62:
63: #define I_CALL 0xe8
64: #define I_CALLI 0xff
65: #define I_RET 0xc3
66: #define I_IRET 0xcf
67:
68: #define inst_trap_return(ins) (((ins)&0xff) == I_IRET)
69: #define inst_return(ins) (((ins)&0xff) == I_RET)
70: #define inst_call(ins) (((ins)&0xff) == I_CALL || \
71: (((ins)&0xff) == I_CALLI && \
72: ((ins)&0x3800) == 0x1000))
73: #define inst_load(ins) 0
74: #define inst_store(ins) 0
75:
76: #define DB_MACHINE_COMMANDS
77:
78: /* macros for printing OS server dependent task name */
79:
80: #define DB_TASK_NAME(task) db_task_name(task)
81: #define DB_TASK_NAME_TITLE "COMMAND "
82: #define DB_TASK_NAME_LEN 23
83: #define DB_NULL_TASK_NAME "? "
84: #define DB_ELF_SYMBOLS
85: #define DB_ELFSIZE 32
86:
87: /*
88: * Constants for KGDB.
89: */
90: typedef long kgdb_reg_t;
91: #define KGDB_NUMREGS 16
92: #define KGDB_BUFLEN 512
93:
94: #define KGDB_ENTER breakpoint()
95:
96: #if 0
97: void db_task_name(/* task_t */);
98: #endif
99:
100: /* macro for checking if a thread has used floating-point */
101:
102: #define db_thread_fp_used(thread) ((thread)->pcb->ims.ifps != 0)
103:
104: int kdb_trap(int, int, db_regs_t *);
105:
106: void db_machine_init(void);
107: int db_enter_ddb(void);
108: void db_startcpu(int cpu);
109: void db_stopcpu(int cpu);
110: void i386_ipi_db(struct cpu_info *);
111:
112: extern struct mutex ddb_mp_mutex;
113:
114: /* For ddb_state */
115: #define DDB_STATE_NOT_RUNNING 0
116: #define DDB_STATE_RUNNING 1
117: #define DDB_STATE_EXITING 2
118:
119: #endif /* _I386_DB_MACHDEP_H_ */
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