1/* $NetBSD: db_machdep.h,v 1.2 2018/04/19 21:50:07 christos Exp $ */ 2 3/*- 4 * Copyright (c) 2014 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Matt Thomas of 3am Software Foundry. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#ifndef _OR1K_DB_MACHDEP_H_ 33#define _OR1K_DB_MACHDEP_H_ 34 35#include <or1k/frame.h> 36 37typedef long int db_expr_t; 38#define DDB_EXPR_FMT "lx" 39typedef uintptr_t db_addr_t; 40#define DDB_ADDR_FMT PRIxPTR 41 42#define BKPT_ADDR(addr) (addr) 43#define BKPT_SIZE 4 44#define BKPT_INSN 0x21000000 45#define BKPT_SET(insn, addr) (BKPT_INSN) 46 47typedef struct trapframe db_regs_t; 48extern db_regs_t ddb_regs; 49#define DDB_REGS (&ddb_regs) 50#define PC_REGS(tf) ((tf)->tf_pc) 51 52#define DB_TRAP_UNKNOWN 0 53#define DB_TRAP_BREAKPOINT 1 54#define DB_TRAP_BKPT_INSN 2 55#define DB_TRAP_WATCHPOINT 3 56 57#define IS_BREAKPOINT_TRAP(type, code) \ 58 ((type) == DB_TRAP_BREAKPOINT || (type) == DB_TRAP_BKPT_INSN) 59#define IS_WATCHPOINT_TRAP(type, code) \ 60 ((type) == DB_TRAP_WATCHPOINT) 61 62static __inline bool 63inst_call(db_expr_t insn) 64{ 65 return (insn & 0xfc000000) == 0x04000000 /* l.jal */ 66 || (insn & 0xffff07ff) == 0x48000000; /* l.jalr */ 67} 68 69static __inline bool 70inst_load(db_expr_t insn) 71{ 72 const unsigned int opcode = isns >> 26; 73 /* l.lwa (0x1b), l.ld (0x20) l.lwz (0x21), l.lws (0x22), */ 74 /* l.lbz (0x23), l.lbs (0x24), l.lhz (0x25), l.lhs (0x26) */ 75 return opcode == 0x1b || (opcode >= 0x20 && opcode <= 0x26); 76} 77 78static __inline bool 79inst_return(db_expr_t insn) 80{ 81 return insn == 0x44004800; /* l.jr r9 */ 82} 83 84static __inline bool 85inst_store(db_expr_t insn) 86{ 87 const unsigned int opcode = isns >> 26; 88 /* l.swa (0x33), l.sd (0x33), l.sw (0x35), l.sb (0x36), l.sh (0x37) */ 89 return opcode >= 0x33 && opcode <= 0x37; 90} 91 92static __inline bool 93inst_trap_return(db_expr_t insn) 94{ 95 return insn == 0x24000000; /* l.rfe */ 96} 97 98#endif /* _OR1K_DB_MACHDEP_H_ */ 99