1 /* $NetBSD: db_machdep.h,v 1.6 2007/02/21 22:59:37 thorpej 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 _I386_DB_MACHDEP_H_ 30 #define _I386_DB_MACHDEP_H_ 31 32 /* 33 * Machine-dependent defines for new kernel debugger. 34 */ 35 36 #include "opt_multiprocessor.h" 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 #ifndef MULTIPROCESSOR 46 extern db_regs_t ddb_regs; /* register state */ 47 #define DDB_REGS (&ddb_regs) 48 #else 49 extern db_regs_t *ddb_regp; 50 #define DDB_REGS (ddb_regp) 51 #define ddb_regs (*ddb_regp) 52 #endif 53 54 #define PC_REGS(regs) ((regs)->tf_rip) 55 #define PC_ADVANCE(r) ((r)->tf_rip += BKPT_SIZE) 56 57 #define BKPT_ADDR(addr) (addr) /* breakpoint address */ 58 #define BKPT_INST 0xcc /* breakpoint instruction */ 59 #define BKPT_SIZE (1) /* size of breakpoint inst */ 60 #define BKPT_SET(inst, addr) (BKPT_INST) 61 62 #define FIXUP_PC_AFTER_BREAK(regs) ((regs)->tf_rip -= BKPT_SIZE) 63 64 #define db_clear_single_step(regs) ((regs)->tf_rflags &= ~PSL_T) 65 #define db_set_single_step(regs) ((regs)->tf_rflags |= PSL_T) 66 67 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BPTFLT) 68 #define IS_WATCHPOINT_TRAP(type, code) ((type) == T_TRCTRAP && (code) & 15) 69 70 #define I_CALL 0xe8 71 #define I_CALLI 0xff 72 #define I_RET 0xc3 73 #define I_IRET 0xcf 74 75 #define inst_trap_return(ins) (((ins)&0xff) == I_IRET) 76 #define inst_return(ins) (((ins)&0xff) == I_RET) 77 #define inst_call(ins) (((ins)&0xff) == I_CALL || \ 78 (((ins)&0xff) == I_CALLI && \ 79 ((ins)&0x3800) == 0x1000)) 80 #define inst_load(ins) 0 81 #define inst_store(ins) 0 82 83 /* access capability and access macros */ 84 85 #define DB_ACCESS_LEVEL 2 /* access any space */ 86 #define DB_CHECK_ACCESS(addr,size,task) \ 87 db_check_access(addr,size,task) 88 #define DB_PHYS_EQ(task1,addr1,task2,addr2) \ 89 db_phys_eq(task1,addr1,task2,addr2) 90 #define DB_VALID_KERN_ADDR(addr) \ 91 ((addr) >= VM_MIN_KERNEL_ADDRESS && \ 92 (addr) < VM_MAX_KERNEL_ADDRESS) 93 #define DB_VALID_ADDRESS(addr,user) \ 94 ((!(user) && DB_VALID_KERN_ADDR(addr)) || \ 95 ((user) && (addr) < VM_MAX_ADDRESS)) 96 97 #if 0 98 bool db_check_access __P((vaddr_t, int, task_t)); 99 bool db_phys_eq __P((task_t, vaddr_t, task_t, vaddr_t)); 100 #endif 101 102 /* macros for printing OS server dependent task name */ 103 104 #define DB_TASK_NAME(task) db_task_name(task) 105 #define DB_TASK_NAME_TITLE "COMMAND " 106 #define DB_TASK_NAME_LEN 23 107 #define DB_NULL_TASK_NAME "? " 108 109 /* 110 * Constants for KGDB. 111 */ 112 typedef long kgdb_reg_t; 113 #define KGDB_NUMREGS 16 114 #define KGDB_BUFLEN 512 115 116 #if 0 117 void db_task_name(/* task_t */); 118 #endif 119 120 /* macro for checking if a thread has used floating-point */ 121 122 #define db_thread_fp_used(thread) ((thread)->pcb->ims.ifps != 0) 123 124 int kdb_trap __P((int, int, db_regs_t *)); 125 126 /* 127 * We define some of our own commands 128 */ 129 #define DB_MACHINE_COMMANDS 130 131 #define DB_ELF_SYMBOLS 132 #define DB_ELFSIZE 64 133 134 extern void db_machine_init __P((void)); 135 136 extern void cpu_debug_dump __P((void)); 137 138 #endif /* _I386_DB_MACHDEP_H_ */ 139