db_machdep.h revision 24344
18876Srgrimes/* 24Srgrimes * Mach Operating System 34Srgrimes * Copyright (c) 1991,1990 Carnegie Mellon University 44Srgrimes * All Rights Reserved. 58876Srgrimes * 64Srgrimes * Permission to use, copy, modify and distribute this software and its 74Srgrimes * documentation is hereby granted, provided that both the copyright 84Srgrimes * notice and this permission notice appear in all copies of the 94Srgrimes * software, derivative works or modified versions, and any portions 104Srgrimes * thereof, and that both notices appear in supporting documentation. 118876Srgrimes * 124Srgrimes * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 134Srgrimes * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 144Srgrimes * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 158876Srgrimes * 164Srgrimes * Carnegie Mellon requests users of this software to return to 178876Srgrimes * 184Srgrimes * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 194Srgrimes * School of Computer Science 204Srgrimes * Carnegie Mellon University 214Srgrimes * Pittsburgh PA 15213-3890 228876Srgrimes * 234Srgrimes * any improvements or extensions that they make and grant Carnegie Mellon 244Srgrimes * the rights to redistribute these changes. 254Srgrimes * 2624344Sbde * $Id: db_machdep.h,v 1.12 1997/02/22 09:34:24 peter Exp $ 274Srgrimes */ 284Srgrimes 295592Sbde#ifndef _MACHINE_DB_MACHDEP_H_ 305592Sbde#define _MACHINE_DB_MACHDEP_H_ 314Srgrimes 3212589Sbde#include <machine/frame.h> 332578Sbde#include <machine/psl.h> 344Srgrimes 354Srgrimes#define i386_saved_state trapframe 364Srgrimes 374Srgrimestypedef vm_offset_t db_addr_t; /* address - unsigned */ 384Srgrimestypedef int db_expr_t; /* expression - signed */ 394Srgrimes 404Srgrimestypedef struct i386_saved_state db_regs_t; 41719Swollmanextern db_regs_t ddb_regs; /* register state */ 424Srgrimes#define DDB_REGS (&ddb_regs) 434Srgrimes 4424344Sbde#define PC_REGS(regs) ((db_addr_t)(regs)->tf_eip) 454Srgrimes 464Srgrimes#define BKPT_INST 0xcc /* breakpoint instruction */ 474Srgrimes#define BKPT_SIZE (1) /* size of breakpoint inst */ 484Srgrimes#define BKPT_SET(inst) (BKPT_INST) 494Srgrimes 504Srgrimes#define FIXUP_PC_AFTER_BREAK ddb_regs.tf_eip -= 1; 514Srgrimes 522578Sbde#define db_clear_single_step(regs) ((regs)->tf_eflags &= ~PSL_T) 532578Sbde#define db_set_single_step(regs) ((regs)->tf_eflags |= PSL_T) 544Srgrimes 554Srgrimes#define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BPTFLT) 565592Sbde/* 575592Sbde * Watchpoints are not supported. The debug exception type is in %dr6 585592Sbde * and not yet in the args to this macro. 595592Sbde */ 605592Sbde#define IS_WATCHPOINT_TRAP(type, code) 0 614Srgrimes 624Srgrimes#define I_CALL 0xe8 634Srgrimes#define I_CALLI 0xff 644Srgrimes#define I_RET 0xc3 654Srgrimes#define I_IRET 0xcf 664Srgrimes 674Srgrimes#define inst_trap_return(ins) (((ins)&0xff) == I_IRET) 684Srgrimes#define inst_return(ins) (((ins)&0xff) == I_RET) 694Srgrimes#define inst_call(ins) (((ins)&0xff) == I_CALL || \ 704Srgrimes (((ins)&0xff) == I_CALLI && \ 714Srgrimes ((ins)&0x3800) == 0x1000)) 724Srgrimes#define inst_load(ins) 0 734Srgrimes#define inst_store(ins) 0 744Srgrimes 7521767Sbde/* 7621767Sbde * There no interesting addresses below _kstack = 0xefbfe000. There 7721767Sbde * are small absolute values for GUPROF, but we don't want to see them. 7821767Sbde * Treat "negative" addresses below _kstack as non-small to allow for 7921767Sbde * future reductions of _kstack and to avoid sign extension problems. 8021767Sbde * 8121767Sbde * There is one interesting symbol above -db_maxoff = 0xffff0000, 8221767Sbde * namely _APTD = 0xfffff000. Accepting this would mess up the 8321767Sbde * printing of small negative offsets. The next largest symbol is 8421767Sbde * _APTmap = 0xffc00000. Accepting this is OK (unless db_maxoff is 8521767Sbde * set to >= 0x400000 - (max stack offset)). 8621767Sbde */ 8721767Sbde#define DB_SMALL_VALUE_MAX 0x7fffffff 8821767Sbde#define DB_SMALL_VALUE_MIN (-0x400001) 8921767Sbde 905592Sbde#endif /* !_MACHINE_DB_MACHDEP_H_ */ 91