1 /* $NetBSD: db_machdep.h,v 1.9 2009/03/14 14:45:54 dsl 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 typedef long db_expr_t; /* expression - signed */ 45 46 typedef struct trapframe db_regs_t; 47 #ifndef MULTIPROCESSOR 48 extern db_regs_t ddb_regs; /* register state */ 49 #define DDB_REGS (&ddb_regs) 50 #else 51 extern db_regs_t *ddb_regp; 52 #define DDB_REGS (ddb_regp) 53 #define ddb_regs (*ddb_regp) 54 #endif 55 56 #define PC_REGS(regs) ((regs)->tf_rip) 57 #define PC_ADVANCE(r) ((r)->tf_rip += BKPT_SIZE) 58 59 #define BKPT_ADDR(addr) (addr) /* breakpoint address */ 60 #define BKPT_INST 0xcc /* breakpoint instruction */ 61 #define BKPT_SIZE (1) /* size of breakpoint inst */ 62 #define BKPT_SET(inst, addr) (BKPT_INST) 63 64 #define FIXUP_PC_AFTER_BREAK(regs) ((regs)->tf_rip -= BKPT_SIZE) 65 66 #define db_clear_single_step(regs) ((regs)->tf_rflags &= ~PSL_T) 67 #define db_set_single_step(regs) ((regs)->tf_rflags |= PSL_T) 68 69 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BPTFLT) 70 #define IS_WATCHPOINT_TRAP(type, code) ((type) == T_TRCTRAP && (code) & 15) 71 72 #define I_CALL 0xe8 73 #define I_CALLI 0xff 74 #define I_RET 0xc3 75 #define I_IRET 0xcf 76 77 #define inst_trap_return(ins) (((ins)&0xff) == I_IRET) 78 #define inst_return(ins) (((ins)&0xff) == I_RET) 79 #define inst_call(ins) (((ins)&0xff) == I_CALL || \ 80 (((ins)&0xff) == I_CALLI && \ 81 ((ins)&0x3800) == 0x1000)) 82 #define inst_load(ins) 0 83 #define inst_store(ins) 0 84 85 /* access capability and access macros */ 86 87 #define DB_ACCESS_LEVEL 2 /* access any space */ 88 #define DB_CHECK_ACCESS(addr,size,task) \ 89 db_check_access(addr,size,task) 90 #define DB_PHYS_EQ(task1,addr1,task2,addr2) \ 91 db_phys_eq(task1,addr1,task2,addr2) 92 #define DB_VALID_KERN_ADDR(addr) \ 93 ((addr) >= VM_MIN_KERNEL_ADDRESS && \ 94 (addr) < VM_MAX_KERNEL_ADDRESS) 95 #define DB_VALID_ADDRESS(addr,user) \ 96 ((!(user) && DB_VALID_KERN_ADDR(addr)) || \ 97 ((user) && (addr) < VM_MAX_ADDRESS)) 98 99 #if 0 100 bool db_check_access(vaddr_t, int, task_t); 101 bool db_phys_eq(task_t, vaddr_t, task_t, vaddr_t); 102 #endif 103 104 /* macros for printing OS server dependent task name */ 105 106 #define DB_TASK_NAME(task) db_task_name(task) 107 #define DB_TASK_NAME_TITLE "COMMAND " 108 #define DB_TASK_NAME_LEN 23 109 #define DB_NULL_TASK_NAME "? " 110 111 /* 112 * Constants for KGDB. 113 */ 114 typedef long kgdb_reg_t; 115 #define KGDB_NUMREGS 16 116 #define KGDB_BUFLEN 512 117 118 #if 0 119 void db_task_name(/* task_t */); 120 #endif 121 122 /* macro for checking if a thread has used floating-point */ 123 124 #define db_thread_fp_used(thread) ((thread)->pcb->ims.ifps != 0) 125 126 int kdb_trap(int, int, db_regs_t *); 127 128 /* 129 * We define some of our own commands 130 */ 131 #define DB_MACHINE_COMMANDS 132 133 #define DB_ELF_SYMBOLS 134 #define DB_ELFSIZE 64 135 136 extern void db_machine_init(void); 137 138 extern void cpu_debug_dump(void); 139 140 #endif /* _X86_64_DB_MACHDEP_H_ */ 141