1 /* $OpenBSD: db_machdep.h,v 1.21 2011/03/23 16:54:35 pirofti Exp $ */ 2 /* $NetBSD: db_machdep.h,v 1.9 1996/05/03 19:23:59 christos Exp $ */ 3 4 /* 5 * Mach Operating System 6 * Copyright (c) 1991,1990 Carnegie Mellon University 7 * All Rights Reserved. 8 * 9 * Permission to use, copy, modify and distribute this software and its 10 * documentation is hereby granted, provided that both the copyright 11 * notice and this permission notice appear in all copies of the 12 * software, derivative works or modified versions, and any portions 13 * thereof, and that both notices appear in supporting documentation. 14 * 15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 16 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 17 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 18 * 19 * Carnegie Mellon requests users of this software to return to 20 * 21 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 22 * School of Computer Science 23 * Carnegie Mellon University 24 * Pittsburgh PA 15213-3890 25 * 26 * any improvements or extensions that they make and grant Carnegie Mellon 27 * the rights to redistribute these changes. 28 */ 29 30 #ifndef _MACHINE_DB_MACHDEP_H_ 31 #define _MACHINE_DB_MACHDEP_H_ 32 33 /* 34 * Machine-dependent defines for new kernel debugger. 35 */ 36 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 extern db_regs_t ddb_regs; /* register state */ 46 #define DDB_REGS (&ddb_regs) 47 48 #define PC_REGS(regs) ((db_addr_t)(regs)->tf_eip) 49 #define SET_PC_REGS(regs, value) (regs)->tf_eip = (int)(value) 50 51 #define BKPT_INST 0xcc /* breakpoint instruction */ 52 #define BKPT_SIZE (1) /* size of breakpoint inst */ 53 #define BKPT_SET(inst) (BKPT_INST) 54 55 #define FIXUP_PC_AFTER_BREAK(regs) ((regs)->tf_eip -= BKPT_SIZE) 56 57 #define db_clear_single_step(regs) ((regs)->tf_eflags &= ~PSL_T) 58 #define db_set_single_step(regs) ((regs)->tf_eflags |= PSL_T) 59 60 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BPTFLT) 61 #define IS_WATCHPOINT_TRAP(type, code) ((type) == T_TRCTRAP && (code) & 15) 62 63 #define I_CALL 0xe8 64 #define I_CALLI 0xff 65 #define I_RET 0xc3 66 #define I_IRET 0xcf 67 68 #define inst_trap_return(ins) (((ins)&0xff) == I_IRET) 69 #define inst_return(ins) (((ins)&0xff) == I_RET) 70 #define inst_call(ins) (((ins)&0xff) == I_CALL || \ 71 (((ins)&0xff) == I_CALLI && \ 72 ((ins)&0x3800) == 0x1000)) 73 74 #define DB_MACHINE_COMMANDS 75 76 /* macros for printing OS server dependent task name */ 77 78 #define DB_TASK_NAME(task) db_task_name(task) 79 #define DB_TASK_NAME_TITLE "COMMAND " 80 #define DB_TASK_NAME_LEN 23 81 #define DB_NULL_TASK_NAME "? " 82 #define DB_ELF_SYMBOLS 83 #define DB_ELFSIZE 32 84 85 /* 86 * Constants for KGDB. 87 */ 88 typedef long kgdb_reg_t; 89 #define KGDB_NUMREGS 16 90 #define KGDB_BUFLEN 512 91 92 #define KGDB_ENTER breakpoint() 93 94 #if 0 95 void db_task_name(/* task_t */); 96 #endif 97 98 /* macro for checking if a thread has used floating-point */ 99 100 int kdb_trap(int, int, db_regs_t *); 101 102 void db_machine_init(void); 103 int db_enter_ddb(void); 104 void db_startcpu(int); 105 void db_stopcpu(int); 106 void i386_ipi_db(struct cpu_info *); 107 108 extern struct mutex ddb_mp_mutex; 109 110 /* For ddb_state */ 111 #define DDB_STATE_NOT_RUNNING 0 112 #define DDB_STATE_RUNNING 1 113 #define DDB_STATE_EXITING 2 114 115 #endif /* _MACHINE_DB_MACHDEP_H_ */ 116