1 /* $NetBSD: db_machdep.h,v 1.18 2002/05/12 23:16:52 matt 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 <sys/param.h> 37 #include <uvm/uvm_extern.h> 38 #include <machine/trap.h> 39 40 typedef vaddr_t db_addr_t; /* address - unsigned */ 41 typedef long db_expr_t; /* expression - signed */ 42 43 typedef struct trapframe db_regs_t; 44 extern db_regs_t ddb_regs; /* register state */ 45 #define DDB_REGS (&ddb_regs) 46 47 #if defined(lint) 48 #define PC_REGS(regs) ((regs)->tf_eip) 49 #else 50 #define PC_REGS(regs) ((db_addr_t)(regs)->tf_eip) 51 #endif 52 53 #define BKPT_INST 0xcc /* breakpoint instruction */ 54 #define BKPT_SIZE (1) /* size of breakpoint inst */ 55 #define BKPT_SET(inst) (BKPT_INST) 56 57 #define FIXUP_PC_AFTER_BREAK(regs) ((regs)->tf_eip -= BKPT_SIZE) 58 59 #define db_clear_single_step(regs) ((regs)->tf_eflags &= ~PSL_T) 60 #define db_set_single_step(regs) ((regs)->tf_eflags |= PSL_T) 61 62 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BPTFLT) 63 #define IS_WATCHPOINT_TRAP(type, code) ((type) == T_TRCTRAP && (code) & 15) 64 65 #define I_CALL 0xe8 66 #define I_CALLI 0xff 67 #define I_RET 0xc3 68 #define I_IRET 0xcf 69 70 #define inst_trap_return(ins) (((ins)&0xff) == I_IRET) 71 #define inst_return(ins) (((ins)&0xff) == I_RET) 72 #define inst_call(ins) (((ins)&0xff) == I_CALL || \ 73 (((ins)&0xff) == I_CALLI && \ 74 ((ins)&0x3800) == 0x1000)) 75 #define inst_load(ins) 0 76 #define inst_store(ins) 0 77 78 /* access capability and access macros */ 79 80 #define DB_ACCESS_LEVEL 2 /* access any space */ 81 #define DB_CHECK_ACCESS(addr,size,task) \ 82 db_check_access(addr,size,task) 83 #define DB_PHYS_EQ(task1,addr1,task2,addr2) \ 84 db_phys_eq(task1,addr1,task2,addr2) 85 #define DB_VALID_KERN_ADDR(addr) \ 86 ((addr) >= VM_MIN_KERNEL_ADDRESS && \ 87 (addr) < VM_MAX_KERNEL_ADDRESS) 88 #define DB_VALID_ADDRESS(addr,user) \ 89 ((!(user) && DB_VALID_KERN_ADDR(addr)) || \ 90 ((user) && (addr) < VM_MAX_ADDRESS)) 91 92 #if 0 93 boolean_t db_check_access __P((vaddr_t, int, task_t)); 94 boolean_t db_phys_eq __P((task_t, vaddr_t, task_t, vaddr_t)); 95 #endif 96 97 /* macros for printing OS server dependent task name */ 98 99 #define DB_TASK_NAME(task) db_task_name(task) 100 #define DB_TASK_NAME_TITLE "COMMAND " 101 #define DB_TASK_NAME_LEN 23 102 #define DB_NULL_TASK_NAME "? " 103 104 /* 105 * Constants for KGDB. 106 */ 107 typedef long kgdb_reg_t; 108 #define KGDB_NUMREGS 16 109 #define KGDB_BUFLEN 512 110 111 #if 0 112 void db_task_name(/* task_t */); 113 #endif 114 115 /* macro for checking if a thread has used floating-point */ 116 117 #define db_thread_fp_used(thread) ((thread)->pcb->ims.ifps != 0) 118 119 int kdb_trap __P((int, int, db_regs_t *)); 120 121 /* 122 * We use either a.out or Elf32 symbols in DDB. 123 */ 124 #define DB_AOUT_SYMBOLS 125 #define DB_ELF_SYMBOLS 126 #define DB_ELFSIZE 32 127 128 #endif /* _I386_DB_MACHDEP_H_ */ 129