1 | /* $NetBSD: db_machdep.h,v 1.15 2015/07/26 10:49:05 mrg Exp $ */ |
2 | |
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. |
13 | * |
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. |
17 | * |
18 | * Carnegie Mellon requests users of this software to return to |
19 | * |
20 | * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU |
21 | * School of Computer Science |
22 | * Carnegie Mellon University |
23 | * Pittsburgh PA 15213-3890 |
24 | * |
25 | * any improvements or extensions that they make and grant Carnegie Mellon |
26 | * the rights to redistribute these changes. |
27 | */ |
28 | |
29 | #ifndef _X86_64_DB_MACHDEP_H_ |
30 | #define _X86_64_DB_MACHDEP_H_ |
31 | |
32 | /* |
33 | * Machine-dependent defines for new kernel debugger. |
34 | */ |
35 | |
36 | #if defined(_KERNEL_OPT) |
37 | #include "opt_multiprocessor.h" |
38 | #endif /* defined(_KERNEL_OPT) */ |
39 | #include <sys/param.h> |
40 | #include <uvm/uvm_extern.h> |
41 | #include <machine/trap.h> |
42 | |
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 */ |
46 | |
47 | typedef struct trapframe db_regs_t; |
48 | |
49 | struct x86_64_frame { |
50 | struct x86_64_frame *f_frame; |
51 | long f_retaddr; |
52 | long f_arg0; |
53 | }; |
54 | |
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 |
63 | |
64 | #define PC_REGS(regs) ((regs)->tf_rip) |
65 | #define PC_ADVANCE(r) ((r)->tf_rip += BKPT_SIZE) |
66 | |
67 | #define BKPT_ADDR(addr) (addr) /* breakpoint address */ |
68 | #define BKPT_INST 0xcc /* breakpoint instruction */ |
69 | #define BKPT_SIZE (1) /* size of breakpoint inst */ |
70 | #define BKPT_SET(inst, addr) (BKPT_INST) |
71 | |
72 | #define FIXUP_PC_AFTER_BREAK(regs) ((regs)->tf_rip -= BKPT_SIZE) |
73 | |
74 | #define db_clear_single_step(regs) ((regs)->tf_rflags &= ~PSL_T) |
75 | #define db_set_single_step(regs) ((regs)->tf_rflags |= PSL_T) |
76 | |
77 | #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BPTFLT) |
78 | #define IS_WATCHPOINT_TRAP(type, code) ((type) == T_TRCTRAP && (code) & 15) |
79 | |
80 | #define I_CALL 0xe8 |
81 | #define I_CALLI 0xff |
82 | #define I_RET 0xc3 |
83 | #define I_IRET 0xcf |
84 | |
85 | #define inst_trap_return(ins) (((ins)&0xff) == I_IRET) |
86 | #define inst_return(ins) (((ins)&0xff) == I_RET) |
87 | #define inst_call(ins) (((ins)&0xff) == I_CALL || \ |
88 | (((ins)&0xff) == I_CALLI && \ |
89 | ((ins)&0x3800) == 0x1000)) |
90 | #define inst_load(ins) (__USE(ins), 0) |
91 | #define inst_store(ins) (__USE(ins), 0) |
92 | |
93 | /* access capability and access macros */ |
94 | |
95 | #define DB_ACCESS_LEVEL 2 /* access any space */ |
96 | #define DB_CHECK_ACCESS(addr,size,task) \ |
97 | db_check_access(addr,size,task) |
98 | #define DB_PHYS_EQ(task1,addr1,task2,addr2) \ |
99 | db_phys_eq(task1,addr1,task2,addr2) |
100 | #define DB_VALID_KERN_ADDR(addr) \ |
101 | ((addr) >= VM_MIN_KERNEL_ADDRESS && \ |
102 | (addr) < VM_MAX_KERNEL_ADDRESS) |
103 | #define DB_VALID_ADDRESS(addr,user) \ |
104 | ((!(user) && DB_VALID_KERN_ADDR(addr)) || \ |
105 | ((user) && (addr) < VM_MAX_ADDRESS)) |
106 | |
107 | #if 0 |
108 | bool db_check_access(vaddr_t, int, task_t); |
109 | bool db_phys_eq(task_t, vaddr_t, task_t, vaddr_t); |
110 | #endif |
111 | |
112 | /* macros for printing OS server dependent task name */ |
113 | |
114 | #define DB_TASK_NAME(task) db_task_name(task) |
115 | #define DB_TASK_NAME_TITLE "COMMAND " |
116 | #define DB_TASK_NAME_LEN 23 |
117 | #define DB_NULL_TASK_NAME "? " |
118 | |
119 | /* |
120 | * Constants for KGDB. |
121 | */ |
122 | typedef long kgdb_reg_t; |
123 | #define KGDB_NUMREGS 20 |
124 | #define KGDB_BUFLEN 512 |
125 | |
126 | #if 0 |
127 | void db_task_name(/* task_t */); |
128 | #endif |
129 | |
130 | /* macro for checking if a thread has used floating-point */ |
131 | |
132 | #define db_thread_fp_used(thread) ((thread)->pcb->ims.ifps != 0) |
133 | |
134 | int kdb_trap(int, int, db_regs_t *); |
135 | |
136 | #ifdef _KERNEL |
137 | /* |
138 | * We define some of our own commands |
139 | */ |
140 | #define DB_MACHINE_COMMANDS |
141 | #endif |
142 | |
143 | #define DB_ELF_SYMBOLS |
144 | #define DB_ELFSIZE 64 |
145 | |
146 | extern void db_machine_init(void); |
147 | |
148 | extern void cpu_debug_dump(void); |
149 | |
150 | #endif /* _X86_64_DB_MACHDEP_H_ */ |
151 | |