db_machdep.h revision 51792
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 * $FreeBSD: head/sys/amd64/include/db_machdep.h 51792 1999-09-29 15:06:27Z marcel $ 27 */ 28 29#ifndef _MACHINE_DB_MACHDEP_H_ 30#define _MACHINE_DB_MACHDEP_H_ 31 32#include <machine/frame.h> 33#include <machine/trap.h> 34#include <machine/psl.h> 35 36#define i386_saved_state trapframe 37 38typedef vm_offset_t db_addr_t; /* address - unsigned */ 39typedef int db_expr_t; /* expression - signed */ 40 41typedef struct i386_saved_state db_regs_t; 42extern db_regs_t ddb_regs; /* register state */ 43#define DDB_REGS (&ddb_regs) 44 45#define PC_REGS(regs) ((db_addr_t)(regs)->tf_eip) 46 47#define BKPT_INST 0xcc /* breakpoint instruction */ 48#define BKPT_SIZE (1) /* size of breakpoint inst */ 49#define BKPT_SET(inst) (BKPT_INST) 50 51#define FIXUP_PC_AFTER_BREAK ddb_regs.tf_eip -= 1; 52 53#define db_clear_single_step(regs) ((regs)->tf_eflags &= ~PSL_T) 54#define db_set_single_step(regs) ((regs)->tf_eflags |= PSL_T) 55 56#define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BPTFLT) 57/* 58 * Watchpoints are not supported. The debug exception type is in %dr6 59 * and not yet in the args to this macro. 60 */ 61#define IS_WATCHPOINT_TRAP(type, code) 0 62 63#define I_CALL 0xe8 64#define I_CALLI 0xff 65#define I_RET 0xc3 66#define I_IRET 0xcf 67 68#define inst_trap_return(ins) (((ins)&0xff) == I_IRET) 69#define inst_return(ins) (((ins)&0xff) == I_RET) 70#define inst_call(ins) (((ins)&0xff) == I_CALL || \ 71 (((ins)&0xff) == I_CALLI && \ 72 ((ins)&0x3800) == 0x1000)) 73#define inst_load(ins) 0 74#define inst_store(ins) 0 75 76/* 77 * There no interesting addresses below _kstack = 0xefbfe000. There 78 * are small absolute values for GUPROF, but we don't want to see them. 79 * Treat "negative" addresses below _kstack as non-small to allow for 80 * future reductions of _kstack and to avoid sign extension problems. 81 * 82 * There is one interesting symbol above -db_maxoff = 0xffff0000, 83 * namely _APTD = 0xfffff000. Accepting this would mess up the 84 * printing of small negative offsets. The next largest symbol is 85 * _APTmap = 0xffc00000. Accepting this is OK (unless db_maxoff is 86 * set to >= 0x400000 - (max stack offset)). 87 */ 88#define DB_SMALL_VALUE_MAX 0x7fffffff 89#define DB_SMALL_VALUE_MIN (-0x400001) 90 91#endif /* !_MACHINE_DB_MACHDEP_H_ */ 92