| 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 | |