1 /* $NetBSD: db_machdep.h,v 1.12 1997/06/26 01:26:57 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 <sys/param.h> 37 #include <vm/vm.h> 38 #include <machine/trap.h> 39 40 typedef vm_offset_t db_addr_t; /* address - unsigned */ 41 typedef long db_expr_t; /* expression - signed */ 42 43 typedef struct trapframe db_regs_t; 44 db_regs_t ddb_regs; /* register state */ 45 #define DDB_REGS (&ddb_regs) 46 47 #define PC_REGS(regs) ((db_addr_t)(regs)->tf_eip) 48 49 #define BKPT_INST 0xcc /* breakpoint instruction */ 50 #define BKPT_SIZE (1) /* size of breakpoint inst */ 51 #define BKPT_SET(inst) (BKPT_INST) 52 53 #define FIXUP_PC_AFTER_BREAK(regs) ((regs)->tf_eip -= BKPT_SIZE) 54 55 #define db_clear_single_step(regs) ((regs)->tf_eflags &= ~PSL_T) 56 #define db_set_single_step(regs) ((regs)->tf_eflags |= PSL_T) 57 58 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BPTFLT) 59 #define IS_WATCHPOINT_TRAP(type, code) ((type) == T_TRCTRAP && (code) & 15) 60 61 #define I_CALL 0xe8 62 #define I_CALLI 0xff 63 #define I_RET 0xc3 64 #define I_IRET 0xcf 65 66 #define inst_trap_return(ins) (((ins)&0xff) == I_IRET) 67 #define inst_return(ins) (((ins)&0xff) == I_RET) 68 #define inst_call(ins) (((ins)&0xff) == I_CALL || \ 69 (((ins)&0xff) == I_CALLI && \ 70 ((ins)&0x3800) == 0x1000)) 71 #define inst_load(ins) 0 72 #define inst_store(ins) 0 73 74 /* access capability and access macros */ 75 76 #define DB_ACCESS_LEVEL 2 /* access any space */ 77 #define DB_CHECK_ACCESS(addr,size,task) \ 78 db_check_access(addr,size,task) 79 #define DB_PHYS_EQ(task1,addr1,task2,addr2) \ 80 db_phys_eq(task1,addr1,task2,addr2) 81 #define DB_VALID_KERN_ADDR(addr) \ 82 ((addr) >= VM_MIN_KERNEL_ADDRESS && \ 83 (addr) < VM_MAX_KERNEL_ADDRESS) 84 #define DB_VALID_ADDRESS(addr,user) \ 85 ((!(user) && DB_VALID_KERN_ADDR(addr)) || \ 86 ((user) && (addr) < VM_MAX_ADDRESS)) 87 88 #if 0 89 boolean_t db_check_access __P((vm_offset_t, int, task_t)); 90 boolean_t db_phys_eq __P((task_t, vm_offset_t, task_t, vm_offset_t)); 91 #endif 92 93 /* macros for printing OS server dependent task name */ 94 95 #define DB_TASK_NAME(task) db_task_name(task) 96 #define DB_TASK_NAME_TITLE "COMMAND " 97 #define DB_TASK_NAME_LEN 23 98 #define DB_NULL_TASK_NAME "? " 99 100 /* 101 * Constants for KGDB. 102 */ 103 typedef long kgdb_reg_t; 104 #define KGDB_NUMREGS 14 105 #define KGDB_BUFLEN 512 106 107 #if 0 108 void db_task_name(/* task_t */); 109 #endif 110 111 /* macro for checking if a thread has used floating-point */ 112 113 #define db_thread_fp_used(thread) ((thread)->pcb->ims.ifps != 0) 114 115 int kdb_trap __P((int, int, db_regs_t *)); 116 117 /* 118 * We use a.out symbols in DDB. 119 */ 120 #define DB_AOUT_SYMBOLS 121 122 #endif /* _I386_DB_MACHDEP_H_ */ 123