1 /* 2 * Mach Operating System 3 * Copyright (c) 1991,1990 Carnegie Mellon University 4 * All Rights Reserved. 5 * 6 * Permission to use, copy, modify and distribute this software and its 7 * documentation is hereby granted, provided that both the copyright 8 * notice and this permission notice appear in all copies of the 9 * software, derivative works or modified versions, and any portions 10 * thereof, and that both notices appear in supporting documentation. 11 * 12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 15 * 16 * Carnegie Mellon requests users of this software to return to 17 * 18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 19 * School of Computer Science 20 * Carnegie Mellon University 21 * Pittsburgh PA 15213-3890 22 * 23 * any improvements or extensions that they make and grant Carnegie Mellon 24 * the rights to redistribute these changes. 25 * 26 * $Id: db_machdep.h,v 1.5 1994/10/02 19:36:30 phk Exp $ 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 <mach/i386/vm_types.h> */ 37 /* #include <mach/i386/vm_param.h> */ 38 #include <vm/vm_prot.h> 39 #include <vm/vm_param.h> 40 #include <vm/vm_inherit.h> 41 #include <vm/lock.h> 42 /* #include <i386/thread.h> */ /* for thread_status */ 43 #include <machine/frame.h> /* for struct trapframe */ 44 /* #include <i386/eflags.h> */ 45 #include <machine/psl.h> 46 /* #include <i386/trap.h> */ 47 #include <machine/trap.h> 48 49 #define i386_saved_state trapframe 50 51 typedef vm_offset_t db_addr_t; /* address - unsigned */ 52 typedef int db_expr_t; /* expression - signed */ 53 54 typedef struct i386_saved_state db_regs_t; 55 extern db_regs_t ddb_regs; /* register state */ 56 #define DDB_REGS (&ddb_regs) 57 58 #define PC_REGS(regs) (((regs)->tf_cs & 0xfffc) == 0x08 \ 59 ? (db_addr_t)(regs)->tf_eip : 0) 60 61 #define BKPT_INST 0xcc /* breakpoint instruction */ 62 #define BKPT_SIZE (1) /* size of breakpoint inst */ 63 #define BKPT_SET(inst) (BKPT_INST) 64 65 #define FIXUP_PC_AFTER_BREAK ddb_regs.tf_eip -= 1; 66 67 #define db_clear_single_step(regs) ((regs)->tf_eflags &= ~PSL_T) 68 #define db_set_single_step(regs) ((regs)->tf_eflags |= PSL_T) 69 70 /* #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_INT3) */ 71 /* #define IS_WATCHPOINT_TRAP(type, code) ((type) == T_WATCHPOINT) */ 72 /* using the FreeBSD values, rather than the Mach ones: */ 73 #define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BPTFLT) 74 #define IS_WATCHPOINT_TRAP(type, code) ((type) == T_KDBTRAP) 75 76 #define I_CALL 0xe8 77 #define I_CALLI 0xff 78 #define I_RET 0xc3 79 #define I_IRET 0xcf 80 81 #define inst_trap_return(ins) (((ins)&0xff) == I_IRET) 82 #define inst_return(ins) (((ins)&0xff) == I_RET) 83 #define inst_call(ins) (((ins)&0xff) == I_CALL || \ 84 (((ins)&0xff) == I_CALLI && \ 85 ((ins)&0x3800) == 0x1000)) 86 #define inst_load(ins) 0 87 #define inst_store(ins) 0 88 89 /* access capability and access macros */ 90 91 #define DB_ACCESS_LEVEL 2 /* access any space */ 92 #define DB_CHECK_ACCESS(addr,size,task) \ 93 db_check_access(addr,size,task) 94 #define DB_PHYS_EQ(task1,addr1,task2,addr2) \ 95 db_phys_eq(task1,addr1,task2,addr2) 96 #define DB_VALID_KERN_ADDR(addr) \ 97 ((addr) >= VM_MIN_KERNEL_ADDRESS && \ 98 (addr) < VM_MAX_KERNEL_ADDRESS) 99 #define DB_VALID_ADDRESS(addr,user) \ 100 ((!(user) && DB_VALID_KERN_ADDR(addr)) || \ 101 ((user) && (addr) < VM_MIN_KERNEL_ADDRESS)) 102 103 boolean_t db_check_access(/* vm_offset_t, int, task_t */); 104 boolean_t db_phys_eq(/* task_t, vm_offset_t, task_t, vm_offset_t */); 105 106 /* macros for printing OS server dependent task name */ 107 108 #define DB_TASK_NAME(task) db_task_name(task) 109 #define DB_TASK_NAME_TITLE "COMMAND " 110 #define DB_TASK_NAME_LEN 23 111 #define DB_NULL_TASK_NAME "? " 112 113 void db_task_name(/* task_t */); 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 #endif /* _I386_DB_MACHDEP_H_ */ 120