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[minix.git] / sys / arch / i386 / include / db_machdep.h
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1 /* $NetBSD: db_machdep.h,v 1.30 2011/05/26 15:34:13 joerg Exp $ */
3 /*
4 * Mach Operating System
5 * Copyright (c) 1991,1990 Carnegie Mellon University
6 * All Rights Reserved.
7 *
8 * Permission to use, copy, modify and distribute this software and its
9 * documentation is hereby granted, provided that both the copyright
10 * notice and this permission notice appear in all copies of the
11 * software, derivative works or modified versions, and any portions
12 * thereof, and that both notices appear in supporting documentation.
14 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
15 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
16 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
18 * Carnegie Mellon requests users of this software to return to
20 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
21 * School of Computer Science
22 * Carnegie Mellon University
23 * Pittsburgh PA 15213-3890
25 * any improvements or extensions that they make and grant Carnegie Mellon
26 * the rights to redistribute these changes.
29 #ifndef _I386_DB_MACHDEP_H_
30 #define _I386_DB_MACHDEP_H_
33 * Machine-dependent defines for new kernel debugger.
36 #if defined(_KERNEL_OPT)
37 #include "opt_multiprocessor.h"
38 #endif
39 #include <sys/param.h>
40 #include <uvm/uvm_extern.h>
41 #include <machine/trap.h>
43 typedef vaddr_t db_addr_t; /* address - unsigned */
44 #define DDB_EXPR_FMT "l" /* expression is long */
45 typedef long db_expr_t; /* expression - signed */
47 typedef struct trapframe db_regs_t;
49 struct i386_frame {
50 struct i386_frame *f_frame;
51 int f_retaddr;
52 int f_arg0;
55 #ifndef MULTIPROCESSOR
56 extern db_regs_t ddb_regs; /* register state */
57 #define DDB_REGS (&ddb_regs)
58 #else
59 extern db_regs_t *ddb_regp;
60 #define DDB_REGS (ddb_regp)
61 #define ddb_regs (*ddb_regp)
62 #endif
64 #define PC_REGS(regs) ((regs)->tf_eip)
66 #define BKPT_ADDR(addr) (addr) /* breakpoint address */
67 #define BKPT_INST 0xcc /* breakpoint instruction */
68 #define BKPT_SIZE (1) /* size of breakpoint inst */
69 #define BKPT_SET(inst, addr) (BKPT_INST)
71 #define FIXUP_PC_AFTER_BREAK(regs) ((regs)->tf_eip -= BKPT_SIZE)
73 #define db_clear_single_step(regs) ((regs)->tf_eflags &= ~PSL_T)
74 #define db_set_single_step(regs) ((regs)->tf_eflags |= PSL_T)
76 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BPTFLT)
77 #define IS_WATCHPOINT_TRAP(type, code) ((type) == T_TRCTRAP && (code) & 15)
79 #define I_CALL 0xe8
80 #define I_CALLI 0xff
81 #define I_RET 0xc3
82 #define I_IRET 0xcf
84 #define inst_trap_return(ins) (((ins)&0xff) == I_IRET)
85 #define inst_return(ins) (((ins)&0xff) == I_RET)
86 #define inst_call(ins) (((ins)&0xff) == I_CALL || \
87 (((ins)&0xff) == I_CALLI && \
88 ((ins)&0x3800) == 0x1000))
89 #define inst_load(ins) 0
90 #define inst_store(ins) 0
92 /* access capability and access macros */
94 #define DB_ACCESS_LEVEL 2 /* access any space */
95 #define DB_CHECK_ACCESS(addr,size,task) \
96 db_check_access(addr,size,task)
97 #define DB_PHYS_EQ(task1,addr1,task2,addr2) \
98 db_phys_eq(task1,addr1,task2,addr2)
99 #define DB_VALID_KERN_ADDR(addr) \
100 ((addr) >= VM_MIN_KERNEL_ADDRESS && \
101 (addr) < VM_MAX_KERNEL_ADDRESS)
102 #define DB_VALID_ADDRESS(addr,user) \
103 ((!(user) && DB_VALID_KERN_ADDR(addr)) || \
104 ((user) && (addr) < VM_MAX_ADDRESS))
106 #if 0
107 bool db_check_access(vaddr_t, int, task_t);
108 bool db_phys_eq(task_t, vaddr_t, task_t, vaddr_t);
109 #endif
111 /* macros for printing OS server dependent task name */
113 #define DB_TASK_NAME(task) db_task_name(task)
114 #define DB_TASK_NAME_TITLE "COMMAND "
115 #define DB_TASK_NAME_LEN 23
116 #define DB_NULL_TASK_NAME "? "
119 * Constants for KGDB.
121 typedef long kgdb_reg_t;
122 #define KGDB_NUMREGS 16
123 #define KGDB_BUFLEN 512
125 #if 0
126 void db_task_name(/* task_t */);
127 #endif
129 /* macro for checking if a thread has used floating-point */
131 #define db_thread_fp_used(thread) ((thread)->pcb->ims.ifps != 0)
133 int kdb_trap(int, int, db_regs_t *);
136 * We define some of our own commands
138 #ifdef _KERNEL
139 #define DB_MACHINE_COMMANDS
140 #endif
143 * We use Elf32 symbols in DDB.
145 #define DB_ELF_SYMBOLS
146 #define DB_ELFSIZE 32
148 extern void db_machine_init(void);
150 extern void cpu_debug_dump(void);
152 /* i386/db_machdep.c */
153 bool db_intrstack_p(const void *);
155 #endif /* _I386_DB_MACHDEP_H_ */