1 /* $NetBSD: db_machdep.h,v 1.31 2017/11/06 03:47:46 christos 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 #if defined(_KERNEL_OPT) 37 #include "opt_multiprocessor.h" 38 #endif 39 #include <sys/param.h> 40 #include <uvm/uvm_extern.h> 41 #include <machine/trap.h> 42 43 typedef vaddr_t db_addr_t; /* address - unsigned */ 44 #define DDB_EXPR_FMT "l" /* expression is long */ 45 typedef long db_expr_t; /* expression - signed */ 46 47 typedef struct trapframe db_regs_t; 48 49 struct i386_frame { 50 struct i386_frame *f_frame; 51 int f_retaddr; 52 int f_arg0; 53 }; 54 55 #ifndef MULTIPROCESSOR 56 extern db_regs_t ddb_regs; /* register state */ 57 #define DDB_REGS (&ddb_regs) 58 #else 59 extern db_regs_t *ddb_regp; 60 #define DDB_REGS (ddb_regp) 61 #define ddb_regs (*ddb_regp) 62 #endif 63 64 #define PC_REGS(regs) ((regs)->tf_eip) 65 66 #define BKPT_ADDR(addr) (addr) /* breakpoint address */ 67 #define BKPT_INST 0xcc /* breakpoint instruction */ 68 #define BKPT_SIZE (1) /* size of breakpoint inst */ 69 #define BKPT_SET(inst, addr) (BKPT_INST) 70 71 #define FIXUP_PC_AFTER_BREAK(regs) ((regs)->tf_eip -= BKPT_SIZE) 72 73 #define db_clear_single_step(regs) ((regs)->tf_eflags &= ~PSL_T) 74 #define db_set_single_step(regs) ((regs)->tf_eflags |= PSL_T) 75 76 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BPTFLT) 77 #define IS_WATCHPOINT_TRAP(type, code) ((type) == T_TRCTRAP && (code) & 15) 78 79 #define I_CALL 0xe8 80 #define I_CALLI 0xff 81 #define I_RET 0xc3 82 #define I_IRET 0xcf 83 84 #define inst_trap_return(ins) (((ins)&0xff) == I_IRET) 85 #define inst_return(ins) (((ins)&0xff) == I_RET) 86 #define inst_call(ins) (((ins)&0xff) == I_CALL || \ 87 (((ins)&0xff) == I_CALLI && \ 88 ((ins)&0x3800) == 0x1000)) 89 #define inst_load(ins) 0 90 #define inst_store(ins) 0 91 92 /* access capability and access macros */ 93 94 #define DB_ACCESS_LEVEL 2 /* access any space */ 95 #define DB_CHECK_ACCESS(addr,size,task) \ 96 db_check_access(addr,size,task) 97 #define DB_PHYS_EQ(task1,addr1,task2,addr2) \ 98 db_phys_eq(task1,addr1,task2,addr2) 99 #define DB_VALID_KERN_ADDR(addr) \ 100 ((addr) >= VM_MIN_KERNEL_ADDRESS && \ 101 (addr) < VM_MAX_KERNEL_ADDRESS) 102 #define DB_VALID_ADDRESS(addr,user) \ 103 ((!(user) && DB_VALID_KERN_ADDR(addr)) || \ 104 ((user) && (addr) < VM_MAX_ADDRESS)) 105 106 #if 0 107 bool db_check_access(vaddr_t, int, task_t); 108 bool db_phys_eq(task_t, vaddr_t, task_t, vaddr_t); 109 #endif 110 111 /* macros for printing OS server dependent task name */ 112 113 #define DB_TASK_NAME(task) db_task_name(task) 114 #define DB_TASK_NAME_TITLE "COMMAND " 115 #define DB_TASK_NAME_LEN 23 116 #define DB_NULL_TASK_NAME "? " 117 118 /* 119 * Constants for KGDB. 120 */ 121 typedef long kgdb_reg_t; 122 #define KGDB_NUMREGS 16 123 #define KGDB_BUFLEN 512 124 125 #if 0 126 void db_task_name(/* task_t */); 127 #endif 128 129 /* macro for checking if a thread has used floating-point */ 130 131 #define db_thread_fp_used(thread) ((thread)->pcb->ims.ifps != 0) 132 133 int kdb_trap(int, int, db_regs_t *); 134 135 /* 136 * We define some of our own commands 137 */ 138 #ifdef _KERNEL 139 #define DB_MACHINE_COMMANDS 140 #endif 141 142 /* 143 * We use Elf32 symbols in DDB. 144 */ 145 #define DB_ELF_SYMBOLS 146 147 extern void db_machine_init(void); 148 149 extern void cpu_debug_dump(void); 150 151 /* i386/db_machdep.c */ 152 bool db_intrstack_p(const void *); 153 154 #endif /* _I386_DB_MACHDEP_H_ */ 155