124 lines
3.6 KiB
C
124 lines
3.6 KiB
C
/* $FreeBSD$ */
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/* $NetBSD: db_machdep.h,v 1.6 1997/09/06 02:02:25 thorpej Exp $ */
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/*
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* Copyright (c) 1995 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Chris G. Demetriou
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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#ifndef _ALPHA_DB_MACHDEP_H_
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#define _ALPHA_DB_MACHDEP_H_
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/*
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* Machine-dependent defines for new kernel debugger.
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*/
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#include "opt_simos.h"
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#include <sys/param.h>
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#include <vm/vm.h>
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#include <machine/frame.h>
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#define DB_NO_AOUT
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typedef vm_offset_t db_addr_t; /* address - unsigned */
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typedef long db_expr_t; /* expression - signed */
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typedef struct trapframe db_regs_t;
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db_regs_t ddb_regs; /* register state */
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#define DDB_REGS (&ddb_regs)
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#define PC_REGS(regs) ((db_addr_t)(regs)->tf_regs[FRAME_PC])
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#ifdef SIMOS
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#define BKPT_INST 0x000000aa /* gentrap instruction */
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#else
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#define BKPT_INST 0x00000080 /* breakpoint instruction */
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#endif
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#define BKPT_SIZE (4) /* size of breakpoint inst */
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#define BKPT_SET(inst) (BKPT_INST)
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#define FIXUP_PC_AFTER_BREAK \
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(ddb_regs.tf_regs[FRAME_PC] -= BKPT_SIZE);
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#define SOFTWARE_SSTEP 1 /* no hardware support */
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#ifdef SIMOS
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#define IS_BREAKPOINT_TRAP(type, code) ((type) == ALPHA_KENTRY_IF && \
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(code) == ALPHA_IF_CODE_GENTRAP)
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#else
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#define IS_BREAKPOINT_TRAP(type, code) ((type) == ALPHA_KENTRY_IF && \
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(code) == ALPHA_IF_CODE_BPT)
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#endif
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#define IS_WATCHPOINT_TRAP(type, code) 0
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/*
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* Functions needed for software single-stepping.
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*/
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boolean_t db_inst_trap_return __P((int inst));
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boolean_t db_inst_return __P((int inst));
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boolean_t db_inst_call __P((int inst));
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boolean_t db_inst_branch __P((int inst));
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boolean_t db_inst_load __P((int inst));
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boolean_t db_inst_store __P((int inst));
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boolean_t db_inst_unconditional_flow_transfer __P((int inst));
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db_addr_t db_branch_taken __P((int inst, db_addr_t pc, db_regs_t *regs));
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#define inst_trap_return(ins) db_inst_trap_return(ins)
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#define inst_return(ins) db_inst_return(ins)
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#define inst_call(ins) db_inst_call(ins)
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#define inst_branch(ins) db_inst_branch(ins)
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#define inst_load(ins) db_inst_load(ins)
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#define inst_store(ins) db_inst_store(ins)
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#define inst_unconditional_flow_transfer(ins) \
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db_inst_unconditional_flow_transfer(ins)
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#define branch_taken(ins, pc, regs) \
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db_branch_taken((ins), (pc), (regs))
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/* No delay slots on Alpha. */
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#define next_instr_address(v, b) ((db_addr_t) ((b) ? (v) : ((v) + 4)))
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u_long db_register_value __P((db_regs_t *, int));
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int kdb_trap __P((unsigned long, unsigned long, unsigned long,
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unsigned long, struct trapframe *));
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/*
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* Pretty arbitrary
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*/
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#define DB_SMALL_VALUE_MAX 0x7fffffff
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#define DB_SMALL_VALUE_MIN (-0x400001)
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/*
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* We define some of our own commands.
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*/
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#define DB_MACHINE_COMMANDS
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/*
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* We use Elf64 symbols in DDB.
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*/
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#define DB_ELFSIZE 64
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#endif /* _ALPHA_DB_MACHDEP_H_ */
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