1 /* $NetBSD: db_machdep.h,v 1.19 2002/10/01 12:57:05 fvdl 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 #ifndef MULTIPROCESSOR 45 extern db_regs_t ddb_regs; /* register state */ 46 #define DDB_REGS (&ddb_regs) 47 #else 48 extern db_regs_t *ddb_regp; 49 #define DDB_REGS (ddb_regp) 50 #define ddb_regs (*ddb_regp) 51 #endif 52 53 #if defined(lint) 54 #define PC_REGS(regs) ((regs)->tf_eip) 55 #else 56 #define PC_REGS(regs) ((db_addr_t)(regs)->tf_eip) 57 #endif 58 59 #define BKPT_INST 0xcc /* breakpoint instruction */ 60 #define BKPT_SIZE (1) /* size of breakpoint inst */ 61 #define BKPT_SET(inst) (BKPT_INST) 62 63 #define FIXUP_PC_AFTER_BREAK(regs) ((regs)->tf_eip -= BKPT_SIZE) 64 65 #define db_clear_single_step(regs) ((regs)->tf_eflags &= ~PSL_T) 66 #define db_set_single_step(regs) ((regs)->tf_eflags |= PSL_T) 67 68 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BPTFLT) 69 #define IS_WATCHPOINT_TRAP(type, code) ((type) == T_TRCTRAP && (code) & 15) 70 71 #define I_CALL 0xe8 72 #define I_CALLI 0xff 73 #define I_RET 0xc3 74 #define I_IRET 0xcf 75 76 #define inst_trap_return(ins) (((ins)&0xff) == I_IRET) 77 #define inst_return(ins) (((ins)&0xff) == I_RET) 78 #define inst_call(ins) (((ins)&0xff) == I_CALL || \ 79 (((ins)&0xff) == I_CALLI && \ 80 ((ins)&0x3800) == 0x1000)) 81 #define inst_load(ins) 0 82 #define inst_store(ins) 0 83 84 /* access capability and access macros */ 85 86 #define DB_ACCESS_LEVEL 2 /* access any space */ 87 #define DB_CHECK_ACCESS(addr,size,task) \ 88 db_check_access(addr,size,task) 89 #define DB_PHYS_EQ(task1,addr1,task2,addr2) \ 90 db_phys_eq(task1,addr1,task2,addr2) 91 #define DB_VALID_KERN_ADDR(addr) \ 92 ((addr) >= VM_MIN_KERNEL_ADDRESS && \ 93 (addr) < VM_MAX_KERNEL_ADDRESS) 94 #define DB_VALID_ADDRESS(addr,user) \ 95 ((!(user) && DB_VALID_KERN_ADDR(addr)) || \ 96 ((user) && (addr) < VM_MAX_ADDRESS)) 97 98 #if 0 99 boolean_t db_check_access __P((vaddr_t, int, task_t)); 100 boolean_t db_phys_eq __P((task_t, vaddr_t, task_t, vaddr_t)); 101 #endif 102 103 /* macros for printing OS server dependent task name */ 104 105 #define DB_TASK_NAME(task) db_task_name(task) 106 #define DB_TASK_NAME_TITLE "COMMAND " 107 #define DB_TASK_NAME_LEN 23 108 #define DB_NULL_TASK_NAME "? " 109 110 /* 111 * Constants for KGDB. 112 */ 113 typedef long kgdb_reg_t; 114 #define KGDB_NUMREGS 16 115 #define KGDB_BUFLEN 512 116 117 #if 0 118 void db_task_name(/* task_t */); 119 #endif 120 121 /* macro for checking if a thread has used floating-point */ 122 123 #define db_thread_fp_used(thread) ((thread)->pcb->ims.ifps != 0) 124 125 int kdb_trap __P((int, int, db_regs_t *)); 126 127 /* 128 * We define some of our own commands 129 */ 130 #define DB_MACHINE_COMMANDS 131 132 /* 133 * We use either a.out or Elf32 symbols in DDB. 134 */ 135 #define DB_AOUT_SYMBOLS 136 #define DB_ELF_SYMBOLS 137 #define DB_ELFSIZE 32 138 139 extern void db_machine_init __P((void)); 140 141 extern void cpu_debug_dump __P((void)); 142 143 #endif /* _I386_DB_MACHDEP_H_ */ 144