3650 lines
130 KiB
JavaScript
3650 lines
130 KiB
JavaScript
/**
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* @fileoverview Implements the PDP11 Debugger component.
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* @author <a href="mailto:Jeff@pcjs.org">Jeff Parsons</a>
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* @version 1.0
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* Created 2016-Sep-03
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*
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* This file is part of PCjs, a computer emulation software project at <http://pcjs.org/>.
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*
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* It has been adapted from the JavaScript PDP 11/70 Emulator v1.3 written by Paul Nankervis
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* (paulnank@hotmail.com) as of August 2016 from http://skn.noip.me/pdp11/pdp11.html. This code
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* may be used freely provided the original author name is acknowledged in any modified source code.
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*
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* PCjs is free software: you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation, either version 3
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* of the License, or (at your option) any later version.
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*
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* PCjs is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
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* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with PCjs. If not,
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* see <http://www.gnu.org/licenses/gpl.html>.
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*
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* You are required to include the above copyright notice in every source code file of every
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* copy or modified version of this work, and to display that copyright notice on every screen
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* that loads or runs any version of this software (see COPYRIGHT in /modules/shared/lib/defines.js).
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*
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* Some PCjs files also attempt to load external resource files, such as character-image files,
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* ROM files, and disk image files. Those external resource files are not considered part of PCjs
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* for purposes of the GNU General Public License, and the author does not claim any copyright
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* as to their contents.
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*/
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"use strict";
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if (DEBUGGER) {
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if (NODE) {
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var str = require("../../shared/lib/strlib");
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var usr = require("../../shared/lib/usrlib");
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var web = require("../../shared/lib/weblib");
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var Component = require("../../shared/lib/component");
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var Debugger = require("../../shared/lib/debugger");
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var Keys = require("../../shared/lib/keys");
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var State = require("../../shared/lib/state");
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var PDP11 = require("./defines");
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var CPUPDP11 = require("./cpu");
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var MessagesPDP11 = require("./messages");
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var MemoryPDP11 = require("./memory");
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}
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}
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/**
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* DebuggerPDP11 Address Object
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*
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* addr address
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* fTemporary true if this is a temporary breakpoint address
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* sCmd set for breakpoint addresses if there's an associated command string
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* aCmds preprocessed commands (from sCmd)
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*
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* @typedef {{
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* addr:(number|undefined),
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* fTemporary:(boolean|undefined),
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* sCmd:(string|undefined),
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* aCmds:(Array.<string>|undefined)
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* }} DbgAddrPDP11
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*/
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var DbgAddrPDP11;
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/**
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* DebuggerPDP11(parmsDbg)
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*
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* @constructor
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* @extends Debugger
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* @param {Object} parmsDbg
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*
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* The DebuggerPDP11 component supports the following optional (parmsDbg) properties:
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*
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* commands: string containing zero or more commands, separated by ';'
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*
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* messages: string containing zero or more message categories to enable;
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* multiple categories must be separated by '|' or ';'. Parsed by messageInit().
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*
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* The DebuggerPDP11 component is an optional component that implements a variety of user
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* commands for controlling the CPU, dumping and editing memory, etc.
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*/
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function DebuggerPDP11(parmsDbg)
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{
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if (DEBUGGER) {
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Debugger.call(this, parmsDbg);
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/*
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* Most commands that require an address call parseAddr(), which defaults to dbgAddrNextCode
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* or dbgAddrNextData when no address has been given. doDump() and doUnassemble(), in turn,
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* update dbgAddrNextData and dbgAddrNextCode, respectively, when they're done.
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*
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* For TEMPORARY breakpoint addresses, we set fTemporary to true, so that they can be automatically
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* cleared when they're hit.
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*/
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this.dbgAddrNextCode = this.newAddr();
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this.dbgAddrNextData = this.newAddr();
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this.dbgAddrAssemble = this.newAddr();
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/*
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* aSymbolTable is an array of SymbolTable objects, one per ROM or other chunk of address space,
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* where each object contains the following properties:
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*
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* sModule
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* addr (physical address, if any; eg, symbols for a ROM)
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* len
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* aSymbols
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* aOffsets
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*
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* See addSymbols() for more details, since that's how callers add sets of symbols to the table.
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*/
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this.aSymbolTable = [];
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/*
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* clearBreakpoints() initializes the breakpoints lists: aBreakExec is a list of addresses
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* to halt on whenever attempting to execute an instruction at the corresponding address,
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* and aBreakRead and aBreakWrite are lists of addresses to halt on whenever a read or write,
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* respectively, occurs at the corresponding address.
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*
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* NOTE: Curiously, after upgrading the Google Closure Compiler from v20141215 to v20150609,
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* the resulting compiled code would crash in clearBreakpoints(), because the (renamed) aBreakRead
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* property was already defined. To eliminate whatever was confusing the Closure Compiler, I've
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* explicitly initialized all the properties that clearBreakpoints() (re)initializes.
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*/
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this.aBreakExec = this.aBreakRead = this.aBreakWrite = [];
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this.clearBreakpoints();
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/*
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* The new "bn" command allows you to specify a number of instructions to execute and then stop;
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* "bn 0" disables any outstanding count.
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*/
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this.nBreakIns = 0;
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/*
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* Execution history is allocated by historyInit() whenever checksEnabled() conditions change.
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* Execution history is updated whenever the CPU calls checkInstruction(), which will happen
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* only when checksEnabled() returns true (eg, whenever one or more breakpoints have been set).
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* This ensures that, by default, the CPU runs as fast as possible.
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*/
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this.historyInit();
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/*
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* Initialize DebuggerPDP11 message support
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*/
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this.afnDumpers = [];
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this.messageInit(parmsDbg['messages']);
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this.sInitCommands = parmsDbg['commands'];
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/*
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* Make it easier to access DebuggerPDP11 commands from an external REPL (eg, the WebStorm
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* "live" console window); eg:
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*
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* pdp11('r')
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* pdp11('dw 0:0')
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* pdp11('h')
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* ...
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*/
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var dbg = this;
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if (window) {
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if (window[PDP11.APPCLASS] === undefined) {
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window[PDP11.APPCLASS] = function(s) { return dbg.doCommands(s); };
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}
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} else {
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if (global[PDP11.APPCLASS] === undefined) {
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global[PDP11.APPCLASS] = function(s) { return dbg.doCommands(s); };
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}
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}
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} // endif DEBUGGER
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}
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if (DEBUGGER) {
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Component.subclass(DebuggerPDP11, Debugger);
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/*
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* NOTE: Every DebuggerPDP11 property from here to the first prototype function definition (initBus()) is
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* considered a "class constant"; most of them use our "all-caps" convention (and all of them SHOULD, but
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* that wouldn't help us catch any bugs).
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*
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* Technically, all of them should ALSO be preceded by a "@const" annotation, but that's a lot of work and it
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* really clutters the code. I wish the Closure Compiler had a way to annotate every definition with a given
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* section with a single annotation....
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*/
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DebuggerPDP11.COMMANDS = {
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'?': "help/print",
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'a [#]': "assemble", // TODO: Implement this command someday
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'b [#]': "breakpoint", // multiple variations (use b? to list them)
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'c': "clear output",
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'd [#]': "dump memory", // additional syntax: d [#] [l#], where l# is a number of bytes to dump
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'e [#]': "edit memory",
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'f': "frequencies",
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'g [#]': "go [to #]",
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'h': "halt",
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'if': "eval expression",
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'int [#]': "request interrupt",
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'k': "stack trace",
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"ln": "list nearest symbol(s)",
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'm': "messages",
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'p': "step over", // other variations: pr (step and dump registers)
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'print': "print expression",
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'r': "dump/set registers",
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'reset': "reset machine",
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's': "set options",
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't [#]': "trace", // other variations: tr (trace and dump registers)
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'u [#]': "unassemble",
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'v': "print version",
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'var': "assign variable"
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};
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/*
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* CPU instruction ordinals
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*/
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DebuggerPDP11.INS = {
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NONE: 0
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};
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/*
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* CPU instruction names (mnemonics), indexed by CPU instruction ordinal (above)
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*/
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DebuggerPDP11.INS_NAMES = [
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"NONE"
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];
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DebuggerPDP11.REG_PC = 0x0C;
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DebuggerPDP11.REG_PSW = 0x0E;
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DebuggerPDP11.REGS = [
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"PC", "PSW"
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];
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/*
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* Operand type descriptor masks and definitions
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*/
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DebuggerPDP11.TYPE_SIZE = 0x000F; // size field
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DebuggerPDP11.TYPE_MODE = 0x00F0; // mode field
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DebuggerPDP11.TYPE_IREG = 0x0F00; // implied register field
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DebuggerPDP11.TYPE_OTHER = 0xF000; // "other" field
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/*
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* TYPE_SIZE values
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*/
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DebuggerPDP11.TYPE_NONE = 0x0000; // (all other TYPE fields ignored)
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DebuggerPDP11.TYPE_BYTE = 0x0001; // byte, regardless of operand size
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DebuggerPDP11.TYPE_SBYTE = 0x0002; // byte sign-extended to word
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DebuggerPDP11.TYPE_WORD = 0x0003; // word (16-bit value)
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/*
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* TYPE_MODE values
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*/
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DebuggerPDP11.TYPE_REG = 0x0010; // register
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DebuggerPDP11.TYPE_IMM = 0x0020; // immediate data
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DebuggerPDP11.TYPE_ADDR = 0x0033; // immediate (word) address
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DebuggerPDP11.TYPE_MEM = 0x0040; // memory reference
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DebuggerPDP11.TYPE_INT = 0x0080; // interrupt level encoded in instruction (bits 3-5)
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/*
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* TYPE_IREG values, based on the REG_* constants.
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*
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* Note that TYPE_M isn't really a register, just an alternative form of TYPE_HL | TYPE_MEM.
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*/
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DebuggerPDP11.TYPE_PC = (DebuggerPDP11.REG_PC << 8 | DebuggerPDP11.TYPE_REG | DebuggerPDP11.TYPE_WORD);
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DebuggerPDP11.TYPE_PSW = (DebuggerPDP11.REG_PSW<< 8 | DebuggerPDP11.TYPE_REG | DebuggerPDP11.TYPE_WORD);
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/*
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* TYPE_OTHER bit definitions
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*/
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DebuggerPDP11.TYPE_IN = 0x1000; // operand is input
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DebuggerPDP11.TYPE_OUT = 0x2000; // operand is output
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DebuggerPDP11.TYPE_BOTH = (DebuggerPDP11.TYPE_IN | DebuggerPDP11.TYPE_OUT);
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DebuggerPDP11.TYPE_UNDOC = 0x8000; // opcode is an undocumented alternative encoding
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/*
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* The aaOpDescs array is indexed by opcode, and each element is a sub-array (aOpDesc) that describes
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* the corresponding opcode. The sub-elements are as follows:
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*
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* [0]: {number} of the opcode name (see INS.*)
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* [1]: {number} containing the destination operand descriptor bit(s), if any
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* [2]: {number} containing the source operand descriptor bit(s), if any
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* [3]: {number} containing the occasional third operand descriptor bit(s), if any
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*
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* These sub-elements are all optional. If [0] is not present, the opcode is undefined; if [1] is not
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* present (or contains zero), the opcode has no (or only implied) operands; if [2] is not present, the
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* opcode has only a single operand. And so on.
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*
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* Additional default rules:
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*
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* 1) If no TYPE_OTHER bits are specified for the first (destination) operand, TYPE_OUT is assumed;
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* 2) If no TYPE_OTHER bits are specified for the second (source) operand, TYPE_IN is assumed;
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* 3) If no size is specified for the second operand, the size is assumed to match the first operand.
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*/
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DebuggerPDP11.aaOpDescs = [
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];
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DebuggerPDP11.HISTORY_LIMIT = DEBUG? 100000 : 1000;
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/**
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* initBus(bus, cpu, dbg)
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*
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* @this {DebuggerPDP11}
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* @param {ComputerPDP11} cmp
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* @param {BusPDP11} bus
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* @param {CPUStatePDP11} cpu
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* @param {DebuggerPDP11} dbg
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*/
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DebuggerPDP11.prototype.initBus = function(cmp, bus, cpu, dbg)
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{
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this.bus = bus;
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this.cpu = cpu;
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this.cmp = cmp;
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/*
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* Re-initialize Debugger message support if necessary
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*/
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var sMessages = cmp.getMachineParm('messages');
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if (sMessages) this.messageInit(sMessages);
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this.aaOpDescs = DebuggerPDP11.aaOpDescs;
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this.messageDump(MessagesPDP11.BUS, function onDumpBus(asArgs) { dbg.dumpBus(asArgs); });
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this.setReady();
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};
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/**
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* setBinding(sHTMLType, sBinding, control, sValue)
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*
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* @this {DebuggerPDP11}
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* @param {string|null} sHTMLType is the type of the HTML control (eg, "button", "list", "text", "submit", "textarea", "canvas")
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* @param {string} sBinding is the value of the 'binding' parameter stored in the HTML control's "data-value" attribute (eg, "debugInput")
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* @param {Object} control is the HTML control DOM object (eg, HTMLButtonElement)
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* @param {string} [sValue] optional data value
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* @return {boolean} true if binding was successful, false if unrecognized binding request
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*/
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DebuggerPDP11.prototype.setBinding = function(sHTMLType, sBinding, control, sValue)
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{
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var dbg = this;
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switch (sBinding) {
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case "debugInput":
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this.bindings[sBinding] = control;
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this.controlDebug = control;
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/*
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* For halted machines, this is fine, but for auto-start machines, it can be annoying.
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*
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* control.focus();
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*/
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control.onkeydown = function onKeyDownDebugInput(event) {
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var sCmd;
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if (event.keyCode == Keys.KEYCODE.CR) {
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sCmd = control.value;
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control.value = "";
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dbg.doCommands(sCmd, true);
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}
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else if (event.keyCode == Keys.KEYCODE.ESC) {
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control.value = sCmd = "";
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}
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else {
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if (event.keyCode == Keys.KEYCODE.UP) {
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sCmd = dbg.getPrevCommand();
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}
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else if (event.keyCode == Keys.KEYCODE.DOWN) {
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sCmd = dbg.getNextCommand();
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}
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if (sCmd != null) {
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var cch = sCmd.length;
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control.value = sCmd;
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control.setSelectionRange(cch, cch);
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}
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}
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if (sCmd != null && event.preventDefault) event.preventDefault();
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};
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return true;
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case "debugEnter":
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this.bindings[sBinding] = control;
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web.onClickRepeat(
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control,
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500, 100,
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function onClickDebugEnter(fRepeat) {
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if (dbg.controlDebug) {
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var sCmd = dbg.controlDebug.value;
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dbg.controlDebug.value = "";
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dbg.doCommands(sCmd, true);
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return true;
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}
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if (DEBUG) dbg.log("no debugger input buffer");
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return false;
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}
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);
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return true;
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case "step":
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this.bindings[sBinding] = control;
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web.onClickRepeat(
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control,
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500, 100,
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function onClickStep(fRepeat) {
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var fCompleted = false;
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if (!dbg.isBusy(true)) {
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dbg.setBusy(true);
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fCompleted = dbg.stepCPU(fRepeat? 1 : 0);
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dbg.setBusy(false);
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}
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return fCompleted;
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}
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);
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return true;
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default:
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break;
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}
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return false;
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};
|
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|
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/**
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* updateFocus()
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*
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* @this {DebuggerPDP11}
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*/
|
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DebuggerPDP11.prototype.updateFocus = function()
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{
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if (this.controlDebug) this.controlDebug.focus();
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};
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/**
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* getAddr(dbgAddr, fWrite, nb)
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*
|
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* @this {DebuggerPDP11}
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* @param {DbgAddrPDP11|null|undefined} dbgAddr
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* @param {boolean} [fWrite]
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* @param {number} [nb] number of bytes to check (1 or 2); default is 1
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* @return {number} is the corresponding linear address, or PDP11.ADDR_INVALID
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*/
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DebuggerPDP11.prototype.getAddr = function(dbgAddr, fWrite, nb)
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{
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var addr = dbgAddr && dbgAddr.addr;
|
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if (addr == null) {
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addr = PDP11.ADDR_INVALID;
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}
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return addr;
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};
|
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|
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/**
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* getByte(dbgAddr, inc)
|
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*
|
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* We must route all our memory requests through the CPU now, in case paging is enabled.
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*
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* @this {DebuggerPDP11}
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* @param {DbgAddrPDP11} dbgAddr
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* @param {number} [inc]
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* @return {number}
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*/
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DebuggerPDP11.prototype.getByte = function(dbgAddr, inc)
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{
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var b = 0xff;
|
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var addr = this.getAddr(dbgAddr, false, 1);
|
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if (addr !== PDP11.ADDR_INVALID) {
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b = this.bus.getByteDirect(addr);
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if (inc) this.incAddr(dbgAddr, inc);
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}
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return b;
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};
|
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|
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/**
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* getWord(dbgAddr, fAdvance)
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*
|
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* @this {DebuggerPDP11}
|
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* @param {DbgAddrPDP11} dbgAddr
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* @param {boolean} [fAdvance]
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* @return {number}
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*/
|
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DebuggerPDP11.prototype.getWord = function(dbgAddr, fAdvance)
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{
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return this.getShort(dbgAddr, fAdvance? 2 : 0);
|
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};
|
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|
|
/**
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* getShort(dbgAddr, inc)
|
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*
|
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* @this {DebuggerPDP11}
|
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* @param {DbgAddrPDP11} dbgAddr
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* @param {number} [inc]
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* @return {number}
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*/
|
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DebuggerPDP11.prototype.getShort = function(dbgAddr, inc)
|
|
{
|
|
var w = 0xffff;
|
|
var addr = this.getAddr(dbgAddr, false, 2);
|
|
if (addr !== PDP11.ADDR_INVALID) {
|
|
w = this.bus.getShortDirect(addr);
|
|
if (inc) this.incAddr(dbgAddr, inc);
|
|
}
|
|
return w;
|
|
};
|
|
|
|
/**
|
|
* setByte(dbgAddr, b, inc)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {DbgAddrPDP11} dbgAddr
|
|
* @param {number} b
|
|
* @param {number} [inc]
|
|
*/
|
|
DebuggerPDP11.prototype.setByte = function(dbgAddr, b, inc)
|
|
{
|
|
var addr = this.getAddr(dbgAddr, true, 1);
|
|
if (addr !== PDP11.ADDR_INVALID) {
|
|
this.bus.setByteDirect(addr, b);
|
|
if (inc) this.incAddr(dbgAddr, inc);
|
|
this.cpu.updateCPU(true); // we set fForce to true in case video memory was the target
|
|
}
|
|
};
|
|
|
|
/**
|
|
* setShort(dbgAddr, w, inc)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {DbgAddrPDP11} dbgAddr
|
|
* @param {number} w
|
|
* @param {number} [inc]
|
|
*/
|
|
DebuggerPDP11.prototype.setShort = function(dbgAddr, w, inc)
|
|
{
|
|
var addr = this.getAddr(dbgAddr, true, 2);
|
|
if (addr !== PDP11.ADDR_INVALID) {
|
|
this.bus.setShortDirect(addr, w);
|
|
if (inc) this.incAddr(dbgAddr, inc);
|
|
this.cpu.updateCPU(true); // we set fForce to true in case video memory was the target
|
|
}
|
|
};
|
|
|
|
/**
|
|
* newAddr(addr)
|
|
*
|
|
* Returns a NEW DbgAddrPDP11 object, initialized with specified values and/or defaults.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {number} [addr]
|
|
* @return {DbgAddrPDP11}
|
|
*/
|
|
DebuggerPDP11.prototype.newAddr = function(addr)
|
|
{
|
|
return {addr: addr, fTemporary: false};
|
|
};
|
|
|
|
/**
|
|
* setAddr(dbgAddr, addr)
|
|
*
|
|
* Updates an EXISTING DbgAddrPDP11 object, initialized with specified values and/or defaults.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {DbgAddrPDP11} dbgAddr
|
|
* @param {number} addr
|
|
* @return {DbgAddrPDP11}
|
|
*/
|
|
DebuggerPDP11.prototype.setAddr = function(dbgAddr, addr)
|
|
{
|
|
dbgAddr.addr = addr;
|
|
dbgAddr.fTemporary = false;
|
|
return dbgAddr;
|
|
};
|
|
|
|
/**
|
|
* packAddr(dbgAddr)
|
|
*
|
|
* Packs a DbgAddrPDP11 object into an Array suitable for saving in a machine state object.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {DbgAddrPDP11} dbgAddr
|
|
* @return {Array}
|
|
*/
|
|
DebuggerPDP11.prototype.packAddr = function(dbgAddr)
|
|
{
|
|
return [dbgAddr.addr, dbgAddr.fTemporary];
|
|
};
|
|
|
|
/**
|
|
* unpackAddr(aAddr)
|
|
*
|
|
* Unpacks a DbgAddrPDP11 object from an Array created by packAddr() and restored from a saved machine state.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {Array} aAddr
|
|
* @return {DbgAddrPDP11}
|
|
*/
|
|
DebuggerPDP11.prototype.unpackAddr = function(aAddr)
|
|
{
|
|
return {addr: aAddr[0], fTemporary: aAddr[1]};
|
|
};
|
|
|
|
/**
|
|
* parseAddr(sAddr, fCode, fNoChecks, fPrint)
|
|
*
|
|
* Address evaluation and validation (eg, range checks) are no longer performed at this stage. That's
|
|
* done later, by getAddr(), which returns PDP11.ADDR_INVALID for invalid segments, out-of-range offsets,
|
|
* etc. The Debugger's low-level get/set memory functions verify all getAddr() results, but even if an
|
|
* invalid address is passed through to the Bus memory interfaces, the address will simply be masked with
|
|
* BusPDP11.nBusLimit; in the case of PDP11.ADDR_INVALID, that will generally refer to the top of the physical
|
|
* address space.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {string|undefined} sAddr
|
|
* @param {boolean} [fCode] (true if target is code, false if target is data)
|
|
* @param {boolean} [fNoChecks] (true when setting breakpoints that may not be valid now, but will be later)
|
|
* @param {boolean} [fPrint]
|
|
* @return {DbgAddrPDP11|null|undefined}
|
|
*/
|
|
DebuggerPDP11.prototype.parseAddr = function(sAddr, fCode, fNoChecks, fPrint)
|
|
{
|
|
var dbgAddr;
|
|
var dbgAddrNext = (fCode? this.dbgAddrNextCode : this.dbgAddrNextData);
|
|
var addr = dbgAddrNext.addr;
|
|
if (sAddr !== undefined) {
|
|
sAddr = this.parseReference(sAddr);
|
|
dbgAddr = this.findSymbolAddr(sAddr);
|
|
if (dbgAddr) return dbgAddr;
|
|
addr = this.parseExpression(sAddr, fPrint);
|
|
}
|
|
if (addr != null) {
|
|
dbgAddr = this.newAddr(addr);
|
|
}
|
|
return dbgAddr;
|
|
};
|
|
|
|
/**
|
|
* parseAddrOptions(dbdAddr, sOptions)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {DbgAddrPDP11} dbgAddr
|
|
* @param {string} [sOptions]
|
|
*/
|
|
DebuggerPDP11.prototype.parseAddrOptions = function(dbgAddr, sOptions)
|
|
{
|
|
if (sOptions) {
|
|
var a = sOptions.match(/(['"])(.*?)\1/);
|
|
if (a) {
|
|
dbgAddr.aCmds = this.parseCommand(dbgAddr.sCmd = a[2]);
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* incAddr(dbgAddr, inc)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {DbgAddrPDP11} dbgAddr
|
|
* @param {number} [inc] contains value to increment dbgAddr by (default is 1)
|
|
*/
|
|
DebuggerPDP11.prototype.incAddr = function(dbgAddr, inc)
|
|
{
|
|
if (dbgAddr.addr != null) {
|
|
dbgAddr.addr += (inc || 1);
|
|
}
|
|
};
|
|
|
|
/**
|
|
* toHexOffset(off)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {number|null|undefined} [off]
|
|
* @return {string} the hex representation of off
|
|
*/
|
|
DebuggerPDP11.prototype.toHexOffset = function(off)
|
|
{
|
|
return str.toHex(off, 4);
|
|
};
|
|
|
|
/**
|
|
* toHexAddr(dbgAddr)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {DbgAddrPDP11} dbgAddr
|
|
* @return {string} the hex representation of the address
|
|
*/
|
|
DebuggerPDP11.prototype.toHexAddr = function(dbgAddr)
|
|
{
|
|
return this.toHexOffset(dbgAddr.addr);
|
|
};
|
|
|
|
/**
|
|
* getSZ(dbgAddr, cchMax)
|
|
*
|
|
* Gets zero-terminated (aka "ASCIIZ") string from dbgAddr. It also stops at the first '$', in case this is
|
|
* a '$'-terminated string -- mainly because I'm lazy and didn't feel like writing a separate get() function.
|
|
* Yes, a zero-terminated string containing a '$' will be prematurely terminated, and no, I don't care.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {DbgAddrPDP11} dbgAddr
|
|
* @param {number} [cchMax] (default is 256)
|
|
* @return {string} (and dbgAddr advanced past the terminating zero)
|
|
*/
|
|
DebuggerPDP11.prototype.getSZ = function(dbgAddr, cchMax)
|
|
{
|
|
var s = "";
|
|
cchMax = cchMax || 256;
|
|
while (s.length < cchMax) {
|
|
var b = this.getByte(dbgAddr, 1);
|
|
if (!b || b == 0x24 || b >= 127) break;
|
|
s += (b >= 32? String.fromCharCode(b) : '.');
|
|
}
|
|
return s;
|
|
};
|
|
|
|
/**
|
|
* dumpBlocks(aBlocks, sAddr)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {Array} aBlocks
|
|
* @param {string} [sAddr] (optional block address)
|
|
*/
|
|
DebuggerPDP11.prototype.dumpBlocks = function(aBlocks, sAddr)
|
|
{
|
|
var addr = 0, i = 0, n = aBlocks.length;
|
|
|
|
if (sAddr) {
|
|
addr = this.getAddr(this.parseAddr(sAddr));
|
|
if (addr === PDP11.ADDR_INVALID) {
|
|
this.println("invalid address: " + sAddr);
|
|
return;
|
|
}
|
|
i = addr >>> this.bus.nBlockShift;
|
|
n = 1;
|
|
}
|
|
|
|
this.println("blockid physical blockaddr used size type");
|
|
this.println("-------- --------- ---------- ------ ------ ----");
|
|
|
|
var typePrev = -1, cPrev = 0;
|
|
while (n--) {
|
|
var block = aBlocks[i];
|
|
if (block.type == typePrev) {
|
|
if (!cPrev++) this.println("...");
|
|
} else {
|
|
typePrev = block.type;
|
|
var sType = MemoryPDP11.TYPE.NAMES[typePrev];
|
|
if (block) {
|
|
this.println(str.toHex(block.id) + " %" + str.toHex(i << this.bus.nBlockShift) + " %%" + str.toHex(block.addr) + " " + str.toHexWord(block.used) + " " + str.toHexWord(block.size) + " " + sType);
|
|
}
|
|
if (typePrev != MemoryPDP11.TYPE.NONE) typePrev = -1;
|
|
cPrev = 0;
|
|
}
|
|
addr += this.bus.nBlockSize;
|
|
i++;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* dumpBus(asArgs)
|
|
*
|
|
* Dumps Bus allocations.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {Array.<string>} asArgs (asArgs[0] is an optional block address)
|
|
*/
|
|
DebuggerPDP11.prototype.dumpBus = function(asArgs)
|
|
{
|
|
this.dumpBlocks(this.bus.aMemBlocks, asArgs[0]);
|
|
};
|
|
|
|
/**
|
|
* dumpHistory(sPrev, sLines)
|
|
*
|
|
* If sLines is not a number, it can be a instruction filter. However, for the moment, the only
|
|
* supported filter is "call", which filters the history buffer for all CALL and RET instructions
|
|
* from the specified previous point forward.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {string} [sPrev] is a (decimal) number of instructions to rewind to (default is 10)
|
|
* @param {string} [sLines] is a (decimal) number of instructions to print (default is, again, 10)
|
|
*/
|
|
DebuggerPDP11.prototype.dumpHistory = function(sPrev, sLines)
|
|
{
|
|
var sMore = "";
|
|
var cHistory = 0;
|
|
var iHistory = this.iOpcodeHistory;
|
|
var aHistory = this.aOpcodeHistory;
|
|
|
|
if (aHistory.length) {
|
|
var nPrev = +sPrev || this.nextHistory;
|
|
var nLines = +sLines || 10;
|
|
|
|
if (isNaN(nPrev)) {
|
|
nPrev = nLines;
|
|
} else {
|
|
sMore = "more ";
|
|
}
|
|
|
|
if (nPrev > aHistory.length) {
|
|
this.println("note: only " + aHistory.length + " available");
|
|
nPrev = aHistory.length;
|
|
}
|
|
|
|
iHistory -= nPrev;
|
|
if (iHistory < 0) {
|
|
/*
|
|
* If the dbgAddr of the last aHistory element contains a valid selector, wrap around.
|
|
*/
|
|
if (aHistory[aHistory.length - 1].addr == null) {
|
|
nPrev = iHistory + nPrev;
|
|
iHistory = 0;
|
|
} else {
|
|
iHistory += aHistory.length;
|
|
}
|
|
}
|
|
|
|
var aFilters = [];
|
|
if (sLines == "call") {
|
|
nLines = 100000;
|
|
aFilters = ["CALL"];
|
|
}
|
|
|
|
if (sPrev !== undefined) {
|
|
this.println(nPrev + " instructions earlier:");
|
|
}
|
|
|
|
/*
|
|
* TODO: The following is necessary to prevent dumpHistory() from causing additional (or worse, recursive)
|
|
* faults due to segmented addresses that are no longer valid, but the only alternative is to dramatically
|
|
* increase the amount of memory used to store instruction history (eg, storing copies of all the instruction
|
|
* bytes alongside the execution addresses).
|
|
*
|
|
* For now, we're living dangerously, so that our history dumps actually work.
|
|
*
|
|
* this.nSuppressBreaks++;
|
|
*
|
|
* If you re-enable this protection, be sure to re-enable the decrement below, too.
|
|
*/
|
|
while (nLines > 0 && iHistory != this.iOpcodeHistory) {
|
|
|
|
var dbgAddr = aHistory[iHistory++];
|
|
if (dbgAddr.addr == null) break;
|
|
|
|
/*
|
|
* We must create a new dbgAddr from the address in aHistory, because dbgAddr was
|
|
* a reference, not a copy, and we don't want getInstruction() modifying the original.
|
|
*/
|
|
var dbgAddrNew = this.newAddr(dbgAddr.addr);
|
|
|
|
var sComment = "history";
|
|
var nSequence = nPrev--;
|
|
if (DEBUG && dbgAddr.cycleCount != null) {
|
|
sComment = "cycles";
|
|
nSequence = dbgAddr.cycleCount;
|
|
}
|
|
|
|
var sInstruction = this.getInstruction(dbgAddrNew, sComment, nSequence);
|
|
|
|
if (!aFilters.length || sInstruction.indexOf(aFilters[0]) >= 0) {
|
|
this.println(sInstruction);
|
|
}
|
|
|
|
/*
|
|
* If there were OPERAND or ADDRESS overrides on the previous instruction, getInstruction()
|
|
* will have automatically disassembled additional bytes, so skip additional history entries.
|
|
*/
|
|
if (dbgAddrNew.cOverrides) {
|
|
iHistory += dbgAddrNew.cOverrides; nLines -= dbgAddrNew.cOverrides; nPrev -= dbgAddrNew.cOverrides;
|
|
}
|
|
|
|
if (iHistory >= aHistory.length) iHistory = 0;
|
|
this.nextHistory = nPrev;
|
|
cHistory++;
|
|
nLines--;
|
|
}
|
|
/*
|
|
* See comments above.
|
|
*
|
|
* this.nSuppressBreaks--;
|
|
*/
|
|
}
|
|
|
|
if (!cHistory) {
|
|
this.println("no " + sMore + "history available");
|
|
this.nextHistory = undefined;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* messageInit(sEnable)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {string|undefined} sEnable contains zero or more message categories to enable, separated by '|'
|
|
*/
|
|
DebuggerPDP11.prototype.messageInit = function(sEnable)
|
|
{
|
|
this.dbg = this;
|
|
this.bitsMessage = this.bitsWarning = MessagesPDP11.WARN;
|
|
this.sMessagePrev = null;
|
|
this.aMessageBuffer = [];
|
|
/*
|
|
* Internally, we use "key" instead of "keys", since the latter is a method on JavasScript objects,
|
|
* but externally, we allow the user to specify "keys"; "kbd" is also allowed as shorthand for "keyboard".
|
|
*/
|
|
var aEnable = this.parseCommand(sEnable.replace("keys","key").replace("kbd","keyboard"), false, '|');
|
|
if (aEnable.length) {
|
|
for (var m in MessagesPDP11.CATEGORIES) {
|
|
if (usr.indexOf(aEnable, m) >= 0) {
|
|
this.bitsMessage |= MessagesPDP11.CATEGORIES[m];
|
|
this.println(m + " messages enabled");
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* messageDump(bitMessage, fnDumper)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {number} bitMessage is one Messages category flag
|
|
* @param {function(Array.<string>)} fnDumper is a function the Debugger can use to dump data for that category
|
|
* @return {boolean} true if successfully registered, false if not
|
|
*/
|
|
DebuggerPDP11.prototype.messageDump = function(bitMessage, fnDumper)
|
|
{
|
|
for (var m in MessagesPDP11.CATEGORIES) {
|
|
if (bitMessage == MessagesPDP11.CATEGORIES[m]) {
|
|
this.afnDumpers[m] = fnDumper;
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
};
|
|
|
|
/**
|
|
* getRegIndex(sReg, off)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {string} sReg
|
|
* @param {number} [off] optional offset into sReg
|
|
* @return {number} register index, or -1 if not found
|
|
*/
|
|
DebuggerPDP11.prototype.getRegIndex = function(sReg, off)
|
|
{
|
|
var i;
|
|
sReg = sReg.toUpperCase();
|
|
if (off == null) {
|
|
i = usr.indexOf(DebuggerPDP11.REGS, sReg);
|
|
} else {
|
|
i = usr.indexOf(DebuggerPDP11.REGS, sReg.substr(off, 2));
|
|
if (i < 0) i = usr.indexOf(DebuggerPDP11.REGS, sReg.substr(off, 1));
|
|
}
|
|
return i;
|
|
};
|
|
|
|
/**
|
|
* getRegString(iReg)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {number} iReg
|
|
* @return {string}
|
|
*/
|
|
DebuggerPDP11.prototype.getRegString = function(iReg)
|
|
{
|
|
var cch = 0;
|
|
var n = this.getRegValue(iReg);
|
|
if (n !== undefined) {
|
|
switch(iReg) {
|
|
case DebuggerPDP11.REG_PC:
|
|
case DebuggerPDP11.REG_PSW:
|
|
cch = 4;
|
|
break;
|
|
}
|
|
}
|
|
return cch? str.toHex(n, cch) : "??";
|
|
};
|
|
|
|
/**
|
|
* getRegValue(iReg)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {number} iReg
|
|
* @return {number|undefined}
|
|
*/
|
|
DebuggerPDP11.prototype.getRegValue = function(iReg)
|
|
{
|
|
var n;
|
|
if (iReg >= 0) {
|
|
var cpu = this.cpu;
|
|
switch(iReg) {
|
|
case DebuggerPDP11.REG_PC:
|
|
n = cpu.getPC();
|
|
break;
|
|
case DebuggerPDP11.REG_PSW:
|
|
n = cpu.getPSW();
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
return n;
|
|
};
|
|
|
|
/**
|
|
* replaceRegs(s)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {string} s
|
|
* @return {string}
|
|
*/
|
|
DebuggerPDP11.prototype.replaceRegs = function(s)
|
|
{
|
|
/*
|
|
* Replace any references first; this means that register references inside the reference
|
|
* do NOT need to be prefixed with '@'.
|
|
*/
|
|
s = this.parseReference(s);
|
|
|
|
/*
|
|
* Replace every @XX (or @XXX), where XX (or XXX) is a register, with the register's value.
|
|
*/
|
|
var i = 0;
|
|
var b, sChar, sAddr, dbgAddr, sReplace;
|
|
while ((i = s.indexOf('@', i)) >= 0) {
|
|
var iReg = this.getRegIndex(s, i + 1);
|
|
if (iReg >= 0) {
|
|
s = s.substr(0, i) + this.getRegString(iReg) + s.substr(i + 1 + DebuggerPDP11.REGS[iReg].length);
|
|
}
|
|
i++;
|
|
}
|
|
/*
|
|
* Replace every #XX, where XX is a hex byte value, with the corresponding ASCII character (if printable).
|
|
*/
|
|
i = 0;
|
|
while ((i = s.indexOf('#', i)) >= 0) {
|
|
sChar = s.substr(i+1, 2);
|
|
b = str.parseInt(sChar, 16);
|
|
if (b != null && b >= 32 && b < 128) {
|
|
sReplace = sChar + " '" + String.fromCharCode(b) + "'";
|
|
s = s.replace('#' + sChar, sReplace);
|
|
i += sReplace.length;
|
|
continue;
|
|
}
|
|
i++;
|
|
}
|
|
/*
|
|
* Replace every $XXXX:XXXX, where XXXX:XXXX is a segmented address, with the zero-terminated string at that address.
|
|
*/
|
|
i = 0;
|
|
while ((i = s.indexOf('$', i)) >= 0) {
|
|
sAddr = s.substr(i+1, 9);
|
|
dbgAddr = this.parseAddr(sAddr);
|
|
if (dbgAddr) {
|
|
sReplace = sAddr + ' "' + this.getSZ(dbgAddr) + '"';
|
|
s = s.replace('$' + sAddr, sReplace);
|
|
i += sReplace.length;
|
|
continue;
|
|
}
|
|
i++;
|
|
}
|
|
/*
|
|
* Replace every ^XXXX:XXXX, where XXXX:XXXX is a segmented address, with the FCB filename stored at that address.
|
|
*/
|
|
i = 0;
|
|
while ((i = s.indexOf('^', i)) >= 0) {
|
|
sAddr = s.substr(i+1, 9);
|
|
dbgAddr = this.parseAddr(sAddr);
|
|
if (dbgAddr) {
|
|
this.incAddr(dbgAddr);
|
|
sReplace = sAddr + ' "' + this.getSZ(dbgAddr, 11) + '"';
|
|
s = s.replace('^' + sAddr, sReplace);
|
|
i += sReplace.length;
|
|
continue;
|
|
}
|
|
i++;
|
|
}
|
|
return s;
|
|
};
|
|
|
|
/**
|
|
* message(sMessage, fAddress)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {string} sMessage is any caller-defined message string
|
|
* @param {boolean} [fAddress] is true to display the current CS:IP
|
|
*/
|
|
DebuggerPDP11.prototype.message = function(sMessage, fAddress)
|
|
{
|
|
if (fAddress) {
|
|
sMessage += " at " + this.toHexAddr(this.newAddr(this.cpu.getPC()));
|
|
}
|
|
|
|
if (this.bitsMessage & MessagesPDP11.BUFFER) {
|
|
this.aMessageBuffer.push(sMessage);
|
|
return;
|
|
}
|
|
|
|
if (this.sMessagePrev && sMessage == this.sMessagePrev) return;
|
|
this.sMessagePrev = sMessage;
|
|
|
|
if (this.bitsMessage & MessagesPDP11.HALT) {
|
|
this.stopCPU();
|
|
sMessage += " (cpu halted)";
|
|
}
|
|
|
|
this.println(sMessage); // + " (" + this.cpu.getCycles() + " cycles)"
|
|
|
|
/*
|
|
* We have no idea what the frequency of println() calls might be; all we know is that they easily
|
|
* screw up the CPU's careful assumptions about cycles per burst. So we call yieldCPU() after every
|
|
* message, to effectively end the current burst and start fresh.
|
|
*
|
|
* TODO: See CPUPDP11.calcStartTime() for a discussion of why we might want to call yieldCPU() *before*
|
|
* we display the message.
|
|
*/
|
|
if (this.cpu) this.cpu.yieldCPU();
|
|
};
|
|
|
|
/**
|
|
* init()
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
*/
|
|
DebuggerPDP11.prototype.init = function()
|
|
{
|
|
this.println("Type ? for help with PDP11 Debugger commands");
|
|
this.updateStatus();
|
|
if (this.sInitCommands) {
|
|
var sCmds = this.sInitCommands;
|
|
this.sInitCommands = null;
|
|
this.doCommands(sCmds);
|
|
}
|
|
};
|
|
|
|
/**
|
|
* historyInit(fQuiet)
|
|
*
|
|
* This function is intended to be called by the constructor, reset(), addBreakpoint(), findBreakpoint()
|
|
* and any other function that changes the checksEnabled() criteria used to decide whether checkInstruction()
|
|
* should be called.
|
|
*
|
|
* That is, if the history arrays need to be allocated and haven't already been allocated, then allocate them,
|
|
* and if the arrays are no longer needed, then deallocate them.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {boolean} [fQuiet]
|
|
*/
|
|
DebuggerPDP11.prototype.historyInit = function(fQuiet)
|
|
{
|
|
var i;
|
|
if (!this.checksEnabled()) {
|
|
if (this.aOpcodeHistory && this.aOpcodeHistory.length && !fQuiet) {
|
|
this.println("instruction history buffer freed");
|
|
}
|
|
this.iOpcodeHistory = 0;
|
|
this.aOpcodeHistory = [];
|
|
this.aaOpcodeCounts = [];
|
|
return;
|
|
}
|
|
if (!this.aOpcodeHistory || !this.aOpcodeHistory.length) {
|
|
this.aOpcodeHistory = new Array(DebuggerPDP11.HISTORY_LIMIT);
|
|
for (i = 0; i < this.aOpcodeHistory.length; i++) {
|
|
/*
|
|
* Preallocate dummy Addr (Array) objects in every history slot, so that
|
|
* checkInstruction() doesn't need to call newAddr() on every slot update.
|
|
*/
|
|
this.aOpcodeHistory[i] = this.newAddr();
|
|
}
|
|
this.iOpcodeHistory = 0;
|
|
if (!fQuiet) {
|
|
this.println("instruction history buffer allocated");
|
|
}
|
|
}
|
|
if (!this.aaOpcodeCounts || !this.aaOpcodeCounts.length) {
|
|
this.aaOpcodeCounts = new Array(256);
|
|
for (i = 0; i < this.aaOpcodeCounts.length; i++) {
|
|
this.aaOpcodeCounts[i] = [i, 0];
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* runCPU(fUpdateFocus)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {boolean} [fUpdateFocus] is true to update focus
|
|
* @return {boolean} true if run request successful, false if not
|
|
*/
|
|
DebuggerPDP11.prototype.runCPU = function(fUpdateFocus)
|
|
{
|
|
if (!this.isCPUAvail()) return false;
|
|
this.cpu.runCPU(fUpdateFocus);
|
|
return true;
|
|
};
|
|
|
|
/**
|
|
* stepCPU(nCycles, fRegs, fUpdateCPU)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {number} nCycles (0 for one instruction without checking breakpoints)
|
|
* @param {boolean} [fRegs] is true to display registers after step (default is false)
|
|
* @param {boolean} [fUpdateCPU] is false to disable calls to updateCPU() (default is true)
|
|
* @return {boolean}
|
|
*/
|
|
DebuggerPDP11.prototype.stepCPU = function(nCycles, fRegs, fUpdateCPU)
|
|
{
|
|
if (!this.isCPUAvail()) return false;
|
|
|
|
this.nCycles = 0;
|
|
|
|
if (!nCycles) {
|
|
/*
|
|
* When single-stepping, the CPU won't call checkInstruction(), which is good for
|
|
* avoiding breakpoints, but bad for instruction data collection if checks are enabled.
|
|
* So we call checkInstruction() ourselves.
|
|
*/
|
|
if (this.checksEnabled()) this.checkInstruction(this.cpu.getPC(), 0);
|
|
}
|
|
try {
|
|
var nCyclesStep = this.cpu.stepCPU(nCycles);
|
|
if (nCyclesStep > 0) {
|
|
this.nCycles += nCyclesStep;
|
|
this.cpu.addCycles(nCyclesStep, true);
|
|
this.cpu.updateChecksum(nCyclesStep);
|
|
this.cOpcodes++;
|
|
}
|
|
}
|
|
catch(exception) {
|
|
if (typeof exception != "number") {
|
|
var e = exception;
|
|
this.nCycles = 0;
|
|
this.cpu.setError(e.stack || e.message);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Because we called cpu.stepCPU() and not cpu.runCPU(), we must nudge the cpu's update code,
|
|
* and then update our own state. Normally, the only time fUpdateCPU will be false is when doTrace()
|
|
* is calling us in a loop, in which case it will perform its own updateCPU() when it's done.
|
|
*/
|
|
if (fUpdateCPU !== false) this.cpu.updateCPU();
|
|
|
|
this.updateStatus(fRegs || false);
|
|
return (this.nCycles > 0);
|
|
};
|
|
|
|
/**
|
|
* stopCPU()
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {boolean} [fComplete]
|
|
*/
|
|
DebuggerPDP11.prototype.stopCPU = function(fComplete)
|
|
{
|
|
if (this.cpu) this.cpu.stopCPU(fComplete);
|
|
};
|
|
|
|
/**
|
|
* updateStatus(fRegs)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {boolean} [fRegs] (default is true)
|
|
*/
|
|
DebuggerPDP11.prototype.updateStatus = function(fRegs)
|
|
{
|
|
if (fRegs === undefined) fRegs = true;
|
|
|
|
this.dbgAddrNextCode = this.newAddr(this.cpu.getPC());
|
|
/*
|
|
* this.nStep used to be a simple boolean, but now it's 0 (or undefined)
|
|
* if inactive, 1 if stepping over an instruction without a register dump, or 2
|
|
* if stepping over an instruction with a register dump.
|
|
*/
|
|
if (!fRegs || this.nStep == 1)
|
|
this.doUnassemble();
|
|
else {
|
|
this.doRegisters();
|
|
}
|
|
};
|
|
|
|
/**
|
|
* isCPUAvail()
|
|
*
|
|
* Make sure the CPU is ready (finished initializing), not busy (already running), and not in an error state.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @return {boolean}
|
|
*/
|
|
DebuggerPDP11.prototype.isCPUAvail = function()
|
|
{
|
|
if (!this.cpu)
|
|
return false;
|
|
if (!this.cpu.isReady())
|
|
return false;
|
|
if (!this.cpu.isPowered())
|
|
return false;
|
|
if (this.cpu.isBusy())
|
|
return false;
|
|
return !this.cpu.isError();
|
|
};
|
|
|
|
/**
|
|
* powerUp(data, fRepower)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {Object|null} data
|
|
* @param {boolean} [fRepower]
|
|
* @return {boolean} true if successful, false if failure
|
|
*/
|
|
DebuggerPDP11.prototype.powerUp = function(data, fRepower)
|
|
{
|
|
if (!fRepower) {
|
|
/*
|
|
* Because Debugger save/restore support is somewhat limited (and didn't always exist),
|
|
* we deviate from the typical save/restore design pattern: instead of reset OR restore,
|
|
* we always reset and then perform a (potentially limited) restore.
|
|
*/
|
|
this.reset(true);
|
|
|
|
// this.println(data? "resuming" : "powering up");
|
|
|
|
if (data && this.restore) {
|
|
if (!this.restore(data)) return false;
|
|
}
|
|
}
|
|
return true;
|
|
};
|
|
|
|
/**
|
|
* powerDown(fSave, fShutdown)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {boolean} [fSave]
|
|
* @param {boolean} [fShutdown]
|
|
* @return {Object|boolean}
|
|
*/
|
|
DebuggerPDP11.prototype.powerDown = function(fSave, fShutdown)
|
|
{
|
|
if (fShutdown) this.println(fSave? "suspending" : "shutting down");
|
|
return fSave? this.save() : true;
|
|
};
|
|
|
|
/**
|
|
* reset(fQuiet)
|
|
*
|
|
* This is a notification handler, called by the Computer, to inform us of a reset.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {boolean} fQuiet (true only when called from our own powerUp handler)
|
|
*/
|
|
DebuggerPDP11.prototype.reset = function(fQuiet)
|
|
{
|
|
this.historyInit();
|
|
this.cOpcodes = this.cOpcodesStart = 0;
|
|
this.sMessagePrev = null;
|
|
this.nCycles = 0;
|
|
this.dbgAddrNextCode = this.newAddr(this.cpu.getPC());
|
|
/*
|
|
* fRunning is set by start() and cleared by stop(). In addition, we clear
|
|
* it here, so that if the CPU is reset while running, we can prevent stop()
|
|
* from unnecessarily dumping the CPU state.
|
|
*/
|
|
this.flags.running = false;
|
|
this.clearTempBreakpoint();
|
|
if (!fQuiet) this.updateStatus();
|
|
};
|
|
|
|
/**
|
|
* save()
|
|
*
|
|
* This implements (very rudimentary) save support for the Debugger component.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @return {Object}
|
|
*/
|
|
DebuggerPDP11.prototype.save = function()
|
|
{
|
|
var state = new State(this);
|
|
state.set(0, this.packAddr(this.dbgAddrNextCode));
|
|
state.set(1, this.packAddr(this.dbgAddrAssemble));
|
|
state.set(2, [this.aPrevCmds, this.fAssemble, this.bitsMessage]);
|
|
state.set(3, this.aSymbolTable);
|
|
return state.data();
|
|
};
|
|
|
|
/**
|
|
* restore(data)
|
|
*
|
|
* This implements (very rudimentary) restore support for the Debugger component.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {Object} data
|
|
* @return {boolean} true if successful, false if failure
|
|
*/
|
|
DebuggerPDP11.prototype.restore = function(data)
|
|
{
|
|
var i = 0;
|
|
if (data[2] !== undefined) {
|
|
this.dbgAddrNextCode = this.unpackAddr(data[i++]);
|
|
this.dbgAddrAssemble = this.unpackAddr(data[i++]);
|
|
this.aPrevCmds = data[i][0];
|
|
if (typeof this.aPrevCmds == "string") this.aPrevCmds = [this.aPrevCmds];
|
|
this.fAssemble = data[i][1];
|
|
this.bitsMessage |= data[i][2]; // keep our current message bits set, and simply "add" any extra bits defined by the saved state
|
|
}
|
|
if (data[3]) this.aSymbolTable = data[3];
|
|
return true;
|
|
};
|
|
|
|
/**
|
|
* start(ms, nCycles)
|
|
*
|
|
* This is a notification handler, called by the Computer, to inform us the CPU has started.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {number} ms
|
|
* @param {number} nCycles
|
|
*/
|
|
DebuggerPDP11.prototype.start = function(ms, nCycles)
|
|
{
|
|
if (!this.nStep) this.println("running");
|
|
this.flags.running = true;
|
|
this.msStart = ms;
|
|
this.nCyclesStart = nCycles;
|
|
};
|
|
|
|
/**
|
|
* stop(ms, nCycles)
|
|
*
|
|
* This is a notification handler, called by the Computer, to inform us the CPU has now stopped.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {number} ms
|
|
* @param {number} nCycles
|
|
*/
|
|
DebuggerPDP11.prototype.stop = function(ms, nCycles)
|
|
{
|
|
if (this.flags.running) {
|
|
this.flags.running = false;
|
|
this.nCycles = nCycles - this.nCyclesStart;
|
|
if (!this.nStep) {
|
|
var sStopped = "stopped";
|
|
if (this.nCycles) {
|
|
var msTotal = ms - this.msStart;
|
|
var nCyclesPerSecond = (msTotal > 0? Math.round(this.nCycles * 1000 / msTotal) : 0);
|
|
sStopped += " (";
|
|
if (this.checksEnabled()) {
|
|
sStopped += this.cOpcodes + " opcodes, ";
|
|
/*
|
|
* $ops displays progress by calculating cOpcodes - cOpcodesStart, so before
|
|
* zeroing cOpcodes, we should subtract cOpcodes from cOpcodesStart (since we're
|
|
* effectively subtracting cOpcodes from cOpcodes as well).
|
|
*/
|
|
this.cOpcodesStart -= this.cOpcodes;
|
|
this.cOpcodes = 0;
|
|
}
|
|
sStopped += this.nCycles + " cycles, " + msTotal + " ms, " + nCyclesPerSecond + " hz)";
|
|
} else {
|
|
if (this.messageEnabled(MessagesPDP11.HALT)) {
|
|
/*
|
|
* It's possible the user is trying to 'g' past a fault that was blocked by helpCheckFault()
|
|
* for the Debugger's benefit; if so, it will continue to be blocked, so try displaying a helpful
|
|
* message (another helpful tip would be to simply turn off the "halt" message category).
|
|
*/
|
|
sStopped += " (use the 't' command to execute blocked faults)";
|
|
}
|
|
}
|
|
this.println(sStopped);
|
|
}
|
|
this.updateStatus(true);
|
|
this.updateFocus();
|
|
this.clearTempBreakpoint(this.cpu.getPC());
|
|
}
|
|
};
|
|
|
|
/**
|
|
* checksEnabled(fRelease)
|
|
*
|
|
* This "check" function is called by the CPU; we indicate whether or not every instruction needs to be checked.
|
|
*
|
|
* Originally, this returned true even when there were only read and/or write breakpoints, but those breakpoints
|
|
* no longer require the intervention of checkInstruction(); the Bus component automatically swaps in/out appropriate
|
|
* "checked" Memory access functions to deal with those breakpoints in the corresponding Memory blocks. So I've
|
|
* simplified the test below.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {boolean} [fRelease] is true for release criteria only; default is false (any criteria)
|
|
* @return {boolean} true if every instruction needs to pass through checkInstruction(), false if not
|
|
*/
|
|
DebuggerPDP11.prototype.checksEnabled = function(fRelease)
|
|
{
|
|
return ((DEBUG && !fRelease)? true : (this.aBreakExec.length > 1 || !!this.nBreakIns));
|
|
};
|
|
|
|
/**
|
|
* checkInstruction(addr, nState)
|
|
*
|
|
* This "check" function is called by the CPU to inform us about the next instruction to be executed,
|
|
* giving us an opportunity to look for "exec" breakpoints and update opcode frequencies and instruction history.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {number} addr
|
|
* @param {number} nState is < 0 if stepping, 0 if starting, or > 0 if running
|
|
* @return {boolean} true if breakpoint hit, false if not
|
|
*/
|
|
DebuggerPDP11.prototype.checkInstruction = function(addr, nState)
|
|
{
|
|
var cpu = this.cpu;
|
|
|
|
if (nState > 0) {
|
|
if (this.nBreakIns && !--this.nBreakIns) {
|
|
return true;
|
|
}
|
|
if (this.checkBreakpoint(addr, 1, this.aBreakExec)) {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* The rest of the instruction tracking logic can only be performed if historyInit() has allocated the
|
|
* necessary data structures. Note that there is no explicit UI for enabling/disabling history, other than
|
|
* adding/removing breakpoints, simply because it's breakpoints that trigger the call to checkInstruction();
|
|
* well, OK, and a few other things now, like enabling MessagesPDP11.INT messages.
|
|
*/
|
|
if (nState >= 0 && this.aaOpcodeCounts.length) {
|
|
this.cOpcodes++;
|
|
var bOpcode = this.bus.getByteDirect(addr);
|
|
if (bOpcode != null) {
|
|
this.aaOpcodeCounts[bOpcode][1]++;
|
|
var dbgAddr = this.aOpcodeHistory[this.iOpcodeHistory];
|
|
this.setAddr(dbgAddr, cpu.getPC());
|
|
if (DEBUG) dbgAddr.cycleCount = cpu.getCycles();
|
|
if (++this.iOpcodeHistory == this.aOpcodeHistory.length) this.iOpcodeHistory = 0;
|
|
}
|
|
}
|
|
return false;
|
|
};
|
|
|
|
/**
|
|
* checkMemoryRead(addr, nb)
|
|
*
|
|
* This "check" function is called by a Memory block to inform us that a memory read occurred, giving us an
|
|
* opportunity to track the read if we want, and look for a matching "read" breakpoint, if any.
|
|
*
|
|
* In the "old days", it would be an error for this call to fail to find a matching Debugger breakpoint, but now
|
|
* Memory blocks have no idea whether the Debugger or the machine's Debug register(s) triggered this "checked" read.
|
|
*
|
|
* If we return true, we "trump" the machine's Debug register(s); false allows normal Debug register processing.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {number} addr
|
|
* @param {number} [nb] (# of bytes; default is 1)
|
|
* @return {boolean} true if breakpoint hit, false if not
|
|
*/
|
|
DebuggerPDP11.prototype.checkMemoryRead = function(addr, nb)
|
|
{
|
|
if (this.checkBreakpoint(addr, nb || 1, this.aBreakRead)) {
|
|
this.stopCPU(true);
|
|
return true;
|
|
}
|
|
return false;
|
|
};
|
|
|
|
/**
|
|
* checkMemoryWrite(addr, nb)
|
|
*
|
|
* This "check" function is called by a Memory block to inform us that a memory write occurred, giving us an
|
|
* opportunity to track the write if we want, and look for a matching "write" breakpoint, if any.
|
|
*
|
|
* In the "old days", it would be an error for this call to fail to find a matching Debugger breakpoint, but now
|
|
* Memory blocks have no idea whether the Debugger or the machine's Debug register(s) triggered this "checked" write.
|
|
*
|
|
* If we return true, we "trump" the machine's Debug register(s); false allows normal Debug register processing.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {number} addr
|
|
* @param {number} [nb] (# of bytes; default is 1)
|
|
* @return {boolean} true if breakpoint hit, false if not
|
|
*/
|
|
DebuggerPDP11.prototype.checkMemoryWrite = function(addr, nb)
|
|
{
|
|
if (this.checkBreakpoint(addr, nb || 1, this.aBreakWrite)) {
|
|
this.stopCPU(true);
|
|
return true;
|
|
}
|
|
return false;
|
|
};
|
|
|
|
/**
|
|
* clearBreakpoints()
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
*/
|
|
DebuggerPDP11.prototype.clearBreakpoints = function()
|
|
{
|
|
var i, dbgAddr;
|
|
this.aBreakExec = ["bp"];
|
|
if (this.aBreakRead !== undefined) {
|
|
for (i = 1; i < this.aBreakRead.length; i++) {
|
|
dbgAddr = this.aBreakRead[i];
|
|
this.bus.removeMemBreak(this.getAddr(dbgAddr), false);
|
|
}
|
|
}
|
|
this.aBreakRead = ["br"];
|
|
if (this.aBreakWrite !== undefined) {
|
|
for (i = 1; i < this.aBreakWrite.length; i++) {
|
|
dbgAddr = this.aBreakWrite[i];
|
|
this.bus.removeMemBreak(this.getAddr(dbgAddr), true);
|
|
}
|
|
}
|
|
this.aBreakWrite = ["bw"];
|
|
/*
|
|
* nSuppressBreaks ensures we can't get into an infinite loop where a breakpoint lookup requires
|
|
* reading a segment descriptor via getSegment(), and that triggers more memory reads, which triggers
|
|
* more breakpoint checks.
|
|
*/
|
|
this.nSuppressBreaks = 0;
|
|
};
|
|
|
|
/**
|
|
* addBreakpoint(aBreak, dbgAddr, fTemporary)
|
|
*
|
|
* In case you haven't already figured this out, all our breakpoint commands use the address
|
|
* to identify a breakpoint, not an incrementally assigned breakpoint index like other debuggers;
|
|
* see doBreak() for details.
|
|
*
|
|
* This has a few implications, one being that you CANNOT set more than one kind of breakpoint
|
|
* on a single address. In practice, that's rarely a problem, because you can almost always set
|
|
* a different breakpoint on a neighboring address.
|
|
*
|
|
* Also, there is one exception to the "one address, one breakpoint" rule, and that involves
|
|
* temporary breakpoints (ie, one-time execution breakpoints that either a "p" or "g" command
|
|
* may create to step over a chunk of code). Those breakpoints automatically clear themselves,
|
|
* so there usually isn't any need to refer to them using breakpoint commands.
|
|
*
|
|
* TODO: Consider supporting the more "traditional" breakpoint index syntax; the current
|
|
* address-based syntax was implemented solely for expediency and consistency. At the same time,
|
|
* also consider a more WDEB386-like syntax, where "br" is used to set a variety of access-specific
|
|
* breakpoints, using modifiers like "r1", "r2", "w1", "w2, etc.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {Array} aBreak
|
|
* @param {DbgAddrPDP11} dbgAddr
|
|
* @param {boolean} [fTemporary]
|
|
* @return {boolean} true if breakpoint added, false if already exists
|
|
*/
|
|
DebuggerPDP11.prototype.addBreakpoint = function(aBreak, dbgAddr, fTemporary)
|
|
{
|
|
var fSuccess = true;
|
|
|
|
// this.nSuppressBreaks++;
|
|
|
|
/*
|
|
* Instead of complaining that a breakpoint already exists (as we used to do), we now
|
|
* allow breakpoints to be re-set; this makes it easier to update any commands that may
|
|
* be associated with the breakpoint.
|
|
*
|
|
* The only exception: we DO allow a temporary breakpoint at an address where there may
|
|
* already be a breakpoint, so that you can easily step ("p" or "g") over such addresses.
|
|
*/
|
|
if (!fTemporary) {
|
|
this.findBreakpoint(aBreak, dbgAddr, true, false, true);
|
|
}
|
|
|
|
if (aBreak != this.aBreakExec) {
|
|
var addr = this.getAddr(dbgAddr);
|
|
if (addr === PDP11.ADDR_INVALID) {
|
|
this.println("invalid address: " + this.toHexAddr(dbgAddr));
|
|
fSuccess = false;
|
|
} else {
|
|
this.bus.addMemBreak(addr, aBreak == this.aBreakWrite);
|
|
}
|
|
}
|
|
|
|
if (fSuccess) {
|
|
aBreak.push(dbgAddr);
|
|
if (fTemporary) {
|
|
dbgAddr.fTemporary = true;
|
|
}
|
|
else {
|
|
this.printBreakpoint(aBreak, aBreak.length-1, "set");
|
|
this.historyInit();
|
|
}
|
|
}
|
|
|
|
// this.nSuppressBreaks--;
|
|
|
|
return fSuccess;
|
|
};
|
|
|
|
/**
|
|
* findBreakpoint(aBreak, dbgAddr, fRemove, fTemporary, fQuiet)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {Array} aBreak
|
|
* @param {DbgAddrPDP11} dbgAddr
|
|
* @param {boolean} [fRemove]
|
|
* @param {boolean} [fTemporary]
|
|
* @param {boolean} [fQuiet]
|
|
* @return {boolean} true if found, false if not
|
|
*/
|
|
DebuggerPDP11.prototype.findBreakpoint = function(aBreak, dbgAddr, fRemove, fTemporary, fQuiet)
|
|
{
|
|
var fFound = false;
|
|
var addr = this.getAddr(dbgAddr);
|
|
for (var i = 1; i < aBreak.length; i++) {
|
|
var dbgAddrBreak = aBreak[i];
|
|
if (addr == this.getAddr(dbgAddrBreak)) {
|
|
if (!fTemporary || dbgAddrBreak.fTemporary) {
|
|
fFound = true;
|
|
if (fRemove) {
|
|
if (!dbgAddrBreak.fTemporary && !fQuiet) {
|
|
this.printBreakpoint(aBreak, i, "cleared");
|
|
}
|
|
aBreak.splice(i, 1);
|
|
if (aBreak != this.aBreakExec) {
|
|
this.bus.removeMemBreak(addr, aBreak == this.aBreakWrite);
|
|
}
|
|
/*
|
|
* We'll mirror the logic in addBreakpoint() and leave the history buffer alone if this
|
|
* was a temporary breakpoint.
|
|
*/
|
|
if (!dbgAddrBreak.fTemporary) {
|
|
this.historyInit();
|
|
}
|
|
break;
|
|
}
|
|
if (!fQuiet) this.printBreakpoint(aBreak, i, "exists");
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return fFound;
|
|
};
|
|
|
|
/**
|
|
* listBreakpoints(aBreak)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {Array} aBreak
|
|
* @return {number} of breakpoints listed, 0 if none
|
|
*/
|
|
DebuggerPDP11.prototype.listBreakpoints = function(aBreak)
|
|
{
|
|
for (var i = 1; i < aBreak.length; i++) {
|
|
this.printBreakpoint(aBreak, i);
|
|
}
|
|
return aBreak.length - 1;
|
|
};
|
|
|
|
/**
|
|
* printBreakpoint(aBreak, i, sAction)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {Array} aBreak
|
|
* @param {number} i
|
|
* @param {string} [sAction]
|
|
*/
|
|
DebuggerPDP11.prototype.printBreakpoint = function(aBreak, i, sAction)
|
|
{
|
|
var dbgAddr = aBreak[i];
|
|
this.println(aBreak[0] + ' ' + this.toHexAddr(dbgAddr) + (sAction? (' ' + sAction) : (dbgAddr.sCmd? (' "' + dbgAddr.sCmd + '"') : '')));
|
|
};
|
|
|
|
/**
|
|
* setTempBreakpoint(dbgAddr)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {DbgAddrPDP11} dbgAddr of new temp breakpoint
|
|
*/
|
|
DebuggerPDP11.prototype.setTempBreakpoint = function(dbgAddr)
|
|
{
|
|
this.addBreakpoint(this.aBreakExec, dbgAddr, true);
|
|
};
|
|
|
|
/**
|
|
* clearTempBreakpoint(addr)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {number|undefined} [addr] clear all temp breakpoints if no address specified
|
|
*/
|
|
DebuggerPDP11.prototype.clearTempBreakpoint = function(addr)
|
|
{
|
|
if (addr !== undefined) {
|
|
this.checkBreakpoint(addr, 1, this.aBreakExec, true);
|
|
this.nStep = 0;
|
|
} else {
|
|
for (var i = 1; i < this.aBreakExec.length; i++) {
|
|
var dbgAddrBreak = this.aBreakExec[i];
|
|
if (dbgAddrBreak.fTemporary) {
|
|
if (!this.findBreakpoint(this.aBreakExec, dbgAddrBreak, true, true)) break;
|
|
i = 0;
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* checkBreakpoint(addr, nb, aBreak, fTemporary)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {number} addr
|
|
* @param {number} nb (# of bytes)
|
|
* @param {Array} aBreak
|
|
* @param {boolean} [fTemporary]
|
|
* @return {boolean} true if breakpoint has been hit, false if not
|
|
*/
|
|
DebuggerPDP11.prototype.checkBreakpoint = function(addr, nb, aBreak, fTemporary)
|
|
{
|
|
/*
|
|
* Time to check for execution breakpoints; note that this should be done BEFORE updating frequency
|
|
* or history data (see checkInstruction), since we might not actually execute the current instruction.
|
|
*/
|
|
var fBreak = false;
|
|
|
|
if (!this.nSuppressBreaks++) {
|
|
|
|
for (var i = 1; !fBreak && i < aBreak.length; i++) {
|
|
|
|
var dbgAddrBreak = aBreak[i];
|
|
|
|
if (fTemporary && !dbgAddrBreak.fTemporary) continue;
|
|
|
|
/*
|
|
* We used to calculate the linear address of the breakpoint at the time the
|
|
* breakpoint was added, so that a breakpoint set in one mode (eg, in real-mode)
|
|
* would still work as intended if the mode changed later (eg, to protected-mode).
|
|
*
|
|
* However, that created difficulties setting protected-mode breakpoints in segments
|
|
* that might not be defined yet, or that could move in physical memory.
|
|
*
|
|
* If you want to create a real-mode breakpoint that will break regardless of mode,
|
|
* use the physical address of the real-mode memory location instead.
|
|
*/
|
|
var addrBreak = this.getAddr(dbgAddrBreak);
|
|
for (var n = 0; n < nb; n++) {
|
|
if (addr + n == addrBreak) {
|
|
var a;
|
|
fBreak = true;
|
|
if (dbgAddrBreak.fTemporary) {
|
|
this.findBreakpoint(aBreak, dbgAddrBreak, true, true);
|
|
fTemporary = true;
|
|
}
|
|
if (a = dbgAddrBreak.aCmds) {
|
|
/*
|
|
* When one or more commands are attached to a breakpoint, we don't halt by default.
|
|
* Instead, we set fBreak to true only if, at the completion of all the commands, the
|
|
* CPU is halted; in other words, you should include "h" as one of the breakpoint commands
|
|
* if you want the breakpoint to stop execution.
|
|
*
|
|
* Another useful command is "if", which will return false if the expression is false,
|
|
* at which point we'll jump ahead to the next "else" command, and if there isn't an "else",
|
|
* we abort.
|
|
*/
|
|
fBreak = false;
|
|
for (var j = 0; j < a.length; j++) {
|
|
if (!this.doCommand(a[j], true)) {
|
|
if (a[j].indexOf("if")) {
|
|
fBreak = true; // the failed command wasn't "if", so abort
|
|
break;
|
|
}
|
|
var k = j + 1;
|
|
for (; k < a.length; k++) {
|
|
if (!a[k].indexOf("else")) break;
|
|
j++;
|
|
}
|
|
if (k == a.length) { // couldn't find an "else" after the "if", so abort
|
|
fBreak = true;
|
|
break;
|
|
}
|
|
/*
|
|
* If we're still here, we'll execute the "else" command (which is just a no-op),
|
|
* followed by any remaining commands.
|
|
*/
|
|
}
|
|
}
|
|
if (!this.cpu.isRunning()) fBreak = true;
|
|
}
|
|
if (fBreak) {
|
|
if (!fTemporary) this.printBreakpoint(aBreak, i, "hit");
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
this.nSuppressBreaks--;
|
|
|
|
return fBreak;
|
|
};
|
|
|
|
/**
|
|
* getInstruction(dbgAddr, sComment, nSequence)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {DbgAddrPDP11} dbgAddr
|
|
* @param {string} [sComment] is an associated comment
|
|
* @param {number} [nSequence] is an associated sequence number, undefined if none
|
|
* @return {string} (and dbgAddr is updated to the next instruction)
|
|
*/
|
|
DebuggerPDP11.prototype.getInstruction = function(dbgAddr, sComment, nSequence)
|
|
{
|
|
var dbgAddrIns = this.newAddr(dbgAddr.addr);
|
|
|
|
var bOpcode = this.getByte(dbgAddr, 1);
|
|
|
|
var asOpcodes = DebuggerPDP11.INS_NAMES;
|
|
var aOpDesc = this.aaOpDescs[bOpcode] || [DebuggerPDP11.INS.NONE];
|
|
var iIns = aOpDesc[0];
|
|
|
|
var sOperands = "";
|
|
var sOpcode = asOpcodes[iIns];
|
|
var cOperands = aOpDesc.length - 1;
|
|
var typeSizeDefault = DebuggerPDP11.TYPE_NONE, type;
|
|
|
|
for (var iOperand = 1; iOperand <= cOperands; iOperand++) {
|
|
|
|
var disp, off, cch;
|
|
var sOperand = "";
|
|
|
|
type = aOpDesc[iOperand];
|
|
if (type === undefined) continue;
|
|
|
|
var typeMode = type & DebuggerPDP11.TYPE_MODE;
|
|
if (!typeMode) continue;
|
|
|
|
var typeSize = type & DebuggerPDP11.TYPE_SIZE;
|
|
if (!typeSize) {
|
|
type |= typeSizeDefault;
|
|
} else {
|
|
typeSizeDefault = typeSize;
|
|
}
|
|
|
|
var typeOther = type & DebuggerPDP11.TYPE_OTHER;
|
|
if (!typeOther) {
|
|
type |= (iOperand == 1? DebuggerPDP11.TYPE_OUT : DebuggerPDP11.TYPE_IN);
|
|
}
|
|
|
|
if (typeMode & DebuggerPDP11.TYPE_IMM) {
|
|
sOperand = this.getImmOperand(type, dbgAddr);
|
|
}
|
|
else if (typeMode & DebuggerPDP11.TYPE_REG) {
|
|
sOperand = this.getRegOperand((type & DebuggerPDP11.TYPE_IREG) >> 8, type, dbgAddr);
|
|
}
|
|
else if (typeMode & DebuggerPDP11.TYPE_INT) {
|
|
sOperand = ((bOpcode >> 3) & 0x7).toString();
|
|
}
|
|
|
|
if (!sOperand || !sOperand.length) {
|
|
sOperands = "INVALID";
|
|
break;
|
|
}
|
|
if (sOperands.length > 0) sOperands += ',';
|
|
sOperands += (sOperand || "???");
|
|
}
|
|
|
|
var sBytes = "";
|
|
var sLine = this.toHexAddr(dbgAddrIns) + ' ';
|
|
if (dbgAddrIns.addr !== PDP11.ADDR_INVALID && dbgAddr.addr !== PDP11.ADDR_INVALID) {
|
|
do {
|
|
sBytes += str.toHex(this.getByte(dbgAddrIns, 1), 2);
|
|
if (dbgAddrIns.addr == null) break;
|
|
} while (dbgAddrIns.addr != dbgAddr.addr);
|
|
}
|
|
|
|
sLine += str.pad(sBytes, 10);
|
|
sLine += (type & DebuggerPDP11.TYPE_UNDOC)? '*' : ' ';
|
|
sLine += str.pad(sOpcode, 7);
|
|
if (sOperands) sLine += ' ' + sOperands;
|
|
|
|
if (sComment) {
|
|
sLine = str.pad(sLine, 40) + ';' + sComment;
|
|
if (!this.cpu.flags.checksum) {
|
|
sLine += (nSequence != null? '=' + nSequence.toString() : "");
|
|
} else {
|
|
var nCycles = this.cpu.getCycles();
|
|
sLine += "cycles=" + nCycles.toString() + " cs=" + str.toHex(this.cpu.nChecksum);
|
|
}
|
|
}
|
|
return sLine;
|
|
};
|
|
|
|
/**
|
|
* getImmOperand(type, dbgAddr)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {number} type
|
|
* @param {DbgAddrPDP11} dbgAddr
|
|
* @return {string} operand
|
|
*/
|
|
DebuggerPDP11.prototype.getImmOperand = function(type, dbgAddr)
|
|
{
|
|
var sOperand = ' ';
|
|
var typeSize = type & DebuggerPDP11.TYPE_SIZE;
|
|
|
|
switch (typeSize) {
|
|
case DebuggerPDP11.TYPE_BYTE:
|
|
sOperand = str.toHex(this.getByte(dbgAddr, 1), 2);
|
|
break;
|
|
case DebuggerPDP11.TYPE_SBYTE:
|
|
sOperand = str.toHex((this.getByte(dbgAddr, 1) << 24) >> 24, 4);
|
|
break;
|
|
case DebuggerPDP11.TYPE_WORD:
|
|
sOperand = str.toHex(this.getShort(dbgAddr, 2), 4);
|
|
break;
|
|
default:
|
|
return "imm(" + str.toHexWord(type) + ')';
|
|
}
|
|
if (type & DebuggerPDP11.TYPE_MEM) {
|
|
sOperand = '[' + sOperand + ']';
|
|
} else if (!(type & DebuggerPDP11.TYPE_REG)) {
|
|
sOperand = "0x" + sOperand;
|
|
}
|
|
return sOperand;
|
|
};
|
|
|
|
/**
|
|
* getRegOperand(iReg, type, dbgAddr)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {number} iReg
|
|
* @param {number} type
|
|
* @param {DbgAddrPDP11} dbgAddr
|
|
* @return {string} operand
|
|
*/
|
|
DebuggerPDP11.prototype.getRegOperand = function(iReg, type, dbgAddr)
|
|
{
|
|
return DebuggerPDP11.REGS[iReg];
|
|
};
|
|
|
|
/**
|
|
* parseInstruction(sOp, sOperand, addr)
|
|
*
|
|
* TODO: Unimplemented. See parseInstruction() in modules/c1pjs/lib/debugger.js for a working implementation.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {string} sOp
|
|
* @param {string|undefined} sOperand
|
|
* @param {DbgAddrPDP11} dbgAddr of memory where this instruction is being assembled
|
|
* @return {Array.<number>} of opcode bytes; if the instruction can't be parsed, the array will be empty
|
|
*/
|
|
DebuggerPDP11.prototype.parseInstruction = function(sOp, sOperand, dbgAddr)
|
|
{
|
|
var aOpBytes = [];
|
|
this.println("not supported yet");
|
|
return aOpBytes;
|
|
};
|
|
|
|
/**
|
|
* getFlagOutput(sFlag)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {string} sFlag
|
|
* @return {string} value of flag
|
|
*/
|
|
DebuggerPDP11.prototype.getFlagOutput = function(sFlag)
|
|
{
|
|
var b;
|
|
switch (sFlag) {
|
|
case "SF":
|
|
b = this.cpu.getSF();
|
|
break;
|
|
case "ZF":
|
|
b = this.cpu.getZF();
|
|
break;
|
|
case "CF":
|
|
b = this.cpu.getCF();
|
|
break;
|
|
default:
|
|
b = 0;
|
|
break;
|
|
}
|
|
return sFlag.charAt(0) + (b? '1' : '0') + ' ';
|
|
};
|
|
|
|
/**
|
|
* getRegOutput(iReg)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {number} iReg
|
|
* @return {string}
|
|
*/
|
|
DebuggerPDP11.prototype.getRegOutput = function(iReg)
|
|
{
|
|
var sReg = DebuggerPDP11.REGS[iReg];
|
|
return sReg + '=' + this.getRegString(iReg) + ' ';
|
|
};
|
|
|
|
/**
|
|
* getRegDump()
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @return {string}
|
|
*/
|
|
DebuggerPDP11.prototype.getRegDump = function()
|
|
{
|
|
return "no regs";
|
|
};
|
|
|
|
/**
|
|
* comparePairs(p1, p2)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {number|string|Array|Object} p1
|
|
* @param {number|string|Array|Object} p2
|
|
* @return {number}
|
|
*/
|
|
DebuggerPDP11.prototype.comparePairs = function(p1, p2)
|
|
{
|
|
return p1[0] > p2[0]? 1 : p1[0] < p2[0]? -1 : 0;
|
|
};
|
|
|
|
/**
|
|
* addSymbols(sModule, addr, len, aSymbols)
|
|
*
|
|
* As filedump.js (formerly convrom.php) explains, aSymbols is a JSON-encoded object whose properties consist
|
|
* of all the symbols (in upper-case), and the values of those properties are objects containing any or all of
|
|
* the following properties:
|
|
*
|
|
* 'v': the value of an absolute (unsized) value
|
|
* 'b': either 1, 2, 4 or undefined if an unsized value
|
|
* 's': either a hard-coded segment or undefined
|
|
* 'o': the offset of the symbol within the associated address space
|
|
* 'l': the original-case version of the symbol, present only if it wasn't originally upper-case
|
|
* 'a': annotation for the specified offset; eg, the original assembly language, with optional comment
|
|
*
|
|
* To that list of properties, we also add:
|
|
*
|
|
* 'p': the physical address (calculated whenever both 's' and 'o' properties are defined)
|
|
*
|
|
* Note that values for any 'v', 'b', 's' and 'o' properties are unquoted decimal values, and the values
|
|
* for any 'l' or 'a' properties are quoted strings. Also, if double-quotes were used in any of the original
|
|
* annotation ('a') values, they will have been converted to two single-quotes, so we're responsible for
|
|
* converting them back to individual double-quotes.
|
|
*
|
|
* For example:
|
|
* {
|
|
* 'HF_PORT': {
|
|
* 'v':800
|
|
* },
|
|
* 'HDISK_INT': {
|
|
* 'b':4, 's':0, 'o':52
|
|
* },
|
|
* 'ORG_VECTOR': {
|
|
* 'b':4, 's':0, 'o':76
|
|
* },
|
|
* 'CMD_BLOCK': {
|
|
* 'b':1, 's':64, 'o':66
|
|
* },
|
|
* 'DISK_SETUP': {
|
|
* 'o':3
|
|
* },
|
|
* '.40': {
|
|
* 'o':40, 'a':"MOV AX,WORD PTR ORG_VECTOR ;GET DISKETTE VECTOR"
|
|
* }
|
|
* }
|
|
*
|
|
* If a symbol only has an offset, then that offset value can be assigned to the symbol property directly:
|
|
*
|
|
* 'DISK_SETUP': 3
|
|
*
|
|
* The last property is an example of an "anonymous" entry, for offsets where there is no associated symbol.
|
|
* Such entries are identified by a period followed by a unique number (usually the offset of the entry), and
|
|
* they usually only contain offset ('o') and annotation ('a') properties. I could eliminate the leading
|
|
* period, but it offers a very convenient way of quickly discriminating among genuine vs. anonymous symbols.
|
|
*
|
|
* We add all these entries to our internal symbol table, which is an array of 4-element arrays, each of which
|
|
* look like:
|
|
*
|
|
* [addr, len, aSymbols, aOffsets]
|
|
*
|
|
* There are two basic symbol operations: findSymbol(), which takes an address and finds the symbol, if any,
|
|
* at that address, and findSymbolAddr(), which takes a string and attempts to match it to a non-anonymous
|
|
* symbol with a matching offset ('o') property.
|
|
*
|
|
* To implement findSymbol() efficiently, addSymbols() creates an array of [offset, sSymbol] pairs
|
|
* (aOffsets), one pair for each symbol that corresponds to an offset within the specified address space.
|
|
*
|
|
* We guarantee the elements of aOffsets are in offset order, because we build it using binaryInsert();
|
|
* it's quite likely that the MAP file already ordered all its symbols in offset order, but since they're
|
|
* hand-edited files, we can't assume that, and we need to ensure that findSymbol()'s binarySearch() operates
|
|
* properly.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {string|null} sModule
|
|
* @param {number|null} addr (physical address where the symbols are located, if the memory is physical; eg, ROM)
|
|
* @param {number} len (the size of the region, in bytes)
|
|
* @param {Object} aSymbols (collection of symbols in this group; the format of this collection is described below)
|
|
*/
|
|
DebuggerPDP11.prototype.addSymbols = function(sModule, addr, len, aSymbols)
|
|
{
|
|
var dbgAddr = {};
|
|
var aOffsets = [];
|
|
for (var sSymbol in aSymbols) {
|
|
var symbol = aSymbols[sSymbol];
|
|
if (typeof symbol == "number") {
|
|
aSymbols[sSymbol] = symbol = {'o': symbol};
|
|
}
|
|
var offSymbol = symbol['o'];
|
|
var sAnnotation = symbol['a'];
|
|
if (offSymbol !== undefined) {
|
|
usr.binaryInsert(aOffsets, [offSymbol >>> 0, sSymbol], this.comparePairs);
|
|
}
|
|
if (sAnnotation) symbol['a'] = sAnnotation.replace(/''/g, "\"");
|
|
}
|
|
var symbolTable = {
|
|
sModule: sModule,
|
|
addr: addr,
|
|
len: len,
|
|
aSymbols: aSymbols,
|
|
aOffsets: aOffsets
|
|
};
|
|
this.aSymbolTable.push(symbolTable);
|
|
};
|
|
|
|
/**
|
|
* dumpSymbols()
|
|
*
|
|
* TODO: Add "numerical" and "alphabetical" dump options. This is simply dumping them in whatever
|
|
* order they appeared in the original MAP file.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
*/
|
|
DebuggerPDP11.prototype.dumpSymbols = function()
|
|
{
|
|
for (var iTable = 0; iTable < this.aSymbolTable.length; iTable++) {
|
|
var symbolTable = this.aSymbolTable[iTable];
|
|
for (var sSymbol in symbolTable.aSymbols) {
|
|
if (sSymbol.charAt(0) == '.') continue;
|
|
var symbol = symbolTable.aSymbols[sSymbol];
|
|
var offSymbol = symbol['o'];
|
|
if (offSymbol === undefined) continue;
|
|
var sSymbolOrig = symbolTable.aSymbols[sSymbol]['l'];
|
|
if (sSymbolOrig) sSymbol = sSymbolOrig;
|
|
this.println(this.toHexOffset(offSymbol) + ' ' + sSymbol);
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* findSymbol(dbgAddr, fNearest)
|
|
*
|
|
* Search aSymbolTable for dbgAddr, and return an Array for the corresponding symbol (empty if not found).
|
|
*
|
|
* If fNearest is true, and no exact match was found, then the Array returned will contain TWO sets of
|
|
* entries: [0]-[3] will refer to closest preceding symbol, and [4]-[7] will refer to the closest subsequent symbol.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {DbgAddrPDP11} dbgAddr
|
|
* @param {boolean} [fNearest]
|
|
* @return {Array} where [0] == symbol name, [1] == symbol value, [2] == any annotation, and [3] == any associated comment
|
|
*/
|
|
DebuggerPDP11.prototype.findSymbol = function(dbgAddr, fNearest)
|
|
{
|
|
var aSymbol = [];
|
|
var addrSymbol = this.getAddr(dbgAddr) >>> 0;
|
|
for (var iTable = 0; iTable < this.aSymbolTable.length; iTable++) {
|
|
var symbolTable = this.aSymbolTable[iTable];
|
|
var addr = symbolTable.addr >>> 0;
|
|
var len = symbolTable.len;
|
|
if (addrSymbol >= addr && addrSymbol < addr + len) {
|
|
var offSymbol = addrSymbol - addr;
|
|
var result = usr.binarySearch(symbolTable.aOffsets, [offSymbol], this.comparePairs);
|
|
if (result >= 0) {
|
|
this.returnSymbol(iTable, result, aSymbol);
|
|
}
|
|
else if (fNearest) {
|
|
result = ~result;
|
|
this.returnSymbol(iTable, result-1, aSymbol);
|
|
this.returnSymbol(iTable, result, aSymbol);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
return aSymbol;
|
|
};
|
|
|
|
/**
|
|
* findSymbolAddr(sSymbol)
|
|
*
|
|
* Search aSymbolTable for sSymbol, and if found, return a dbgAddr (same as parseAddr())
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {string} sSymbol
|
|
* @return {DbgAddrPDP11|undefined}
|
|
*/
|
|
DebuggerPDP11.prototype.findSymbolAddr = function(sSymbol)
|
|
{
|
|
var dbgAddr;
|
|
if (sSymbol.match(/^[a-z_][a-z0-9_]*$/i)) {
|
|
var sUpperCase = sSymbol.toUpperCase();
|
|
for (var iTable = 0; iTable < this.aSymbolTable.length; iTable++) {
|
|
var symbolTable = this.aSymbolTable[iTable];
|
|
var symbol = symbolTable.aSymbols[sUpperCase];
|
|
if (symbol !== undefined) {
|
|
var offSymbol = symbol['o'];
|
|
if (offSymbol !== undefined) {
|
|
/*
|
|
* We assume that every ROM is ORG'ed at 0x0000, and therefore unless the symbol has an
|
|
* explicitly-defined segment, we return the segment associated with the entire group; for
|
|
* a ROM, that segment is normally "addrROM >>> 4". Down the road, we may want/need to
|
|
* support a special symbol entry (eg, ".ORG") that defines an alternate origin.
|
|
*/
|
|
dbgAddr = this.newAddr(offSymbol);
|
|
}
|
|
/*
|
|
* The symbol matched, but it wasn't for an address (no 'o' offset), and there's no point
|
|
* looking any farther, since each symbol appears only once, so we indicate it's an unknown symbol.
|
|
*/
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return dbgAddr;
|
|
};
|
|
|
|
/**
|
|
* returnSymbol(iTable, iOffset, aSymbol)
|
|
*
|
|
* Helper function for findSymbol().
|
|
*
|
|
* @param {number} iTable
|
|
* @param {number} iOffset
|
|
* @param {Array} aSymbol is updated with the specified symbol, if it exists
|
|
*/
|
|
DebuggerPDP11.prototype.returnSymbol = function(iTable, iOffset, aSymbol)
|
|
{
|
|
var symbol = {};
|
|
var aOffsets = this.aSymbolTable[iTable].aOffsets;
|
|
var offset = 0, sSymbol = null;
|
|
if (iOffset >= 0 && iOffset < aOffsets.length) {
|
|
offset = aOffsets[iOffset][0];
|
|
sSymbol = aOffsets[iOffset][1];
|
|
}
|
|
if (sSymbol) {
|
|
symbol = this.aSymbolTable[iTable].aSymbols[sSymbol];
|
|
sSymbol = (sSymbol.charAt(0) == '.'? null : (symbol['l'] || sSymbol));
|
|
}
|
|
aSymbol.push(sSymbol);
|
|
aSymbol.push(offset);
|
|
aSymbol.push(symbol['a']);
|
|
aSymbol.push(symbol['c']);
|
|
};
|
|
|
|
/**
|
|
* doHelp()
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
*/
|
|
DebuggerPDP11.prototype.doHelp = function()
|
|
{
|
|
var s = "commands:";
|
|
for (var sCommand in DebuggerPDP11.COMMANDS) {
|
|
s += '\n' + str.pad(sCommand, 9) + DebuggerPDP11.COMMANDS[sCommand];
|
|
}
|
|
if (!this.checksEnabled()) s += "\nnote: frequency/history disabled if no exec breakpoints";
|
|
this.println(s);
|
|
};
|
|
|
|
/**
|
|
* doAssemble(asArgs)
|
|
*
|
|
* This always receives the complete argument array, where the order of the arguments is:
|
|
*
|
|
* [0]: the assemble command (assumed to be "a")
|
|
* [1]: the target address (eg, "200")
|
|
* [2]: the operation code, aka instruction name (eg, "adc")
|
|
* [3]: the operation mode operand, if any (eg, "14", "[1234]", etc)
|
|
*
|
|
* The Debugger enters "assemble mode" whenever only the first (or first and second) arguments are present.
|
|
* As long as "assemble mode is active, the user can omit the first two arguments on all later assemble commands
|
|
* until "assemble mode" is cancelled with an empty command line; the command processor automatically prepends "a"
|
|
* and the next available target address to the argument array.
|
|
*
|
|
* Entering "assemble mode" is optional; one could enter a series of fully-qualified assemble commands; eg:
|
|
*
|
|
* a ff00 cld
|
|
* a ff01 ldx 28
|
|
* ...
|
|
*
|
|
* without ever entering "assemble mode", but of course, that requires more typing and doesn't take advantage
|
|
* of automatic target address advancement (see dbgAddrAssemble).
|
|
*
|
|
* NOTE: As the previous example implies, you can even assemble new instructions into ROM address space;
|
|
* as our setByte() function explains, the ROM write-notification handlers only refuse writes from the CPU.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {Array.<string>} asArgs is the complete argument array, beginning with the "a" command in asArgs[0]
|
|
*/
|
|
DebuggerPDP11.prototype.doAssemble = function(asArgs)
|
|
{
|
|
var dbgAddr = this.parseAddr(asArgs[1], true);
|
|
if (!dbgAddr) return;
|
|
|
|
this.dbgAddrAssemble = dbgAddr;
|
|
if (asArgs[2] === undefined) {
|
|
this.println("begin assemble at " + this.toHexAddr(dbgAddr));
|
|
this.fAssemble = true;
|
|
this.cpu.updateCPU();
|
|
return;
|
|
}
|
|
|
|
var aOpBytes = this.parseInstruction(asArgs[2], asArgs[3], dbgAddr);
|
|
if (aOpBytes.length) {
|
|
for (var i = 0; i < aOpBytes.length; i++) {
|
|
this.setByte(dbgAddr, aOpBytes[i], 1);
|
|
}
|
|
/*
|
|
* Since getInstruction() also updates the specified address, dbgAddrAssemble is automatically advanced.
|
|
*/
|
|
this.println(this.getInstruction(this.dbgAddrAssemble));
|
|
}
|
|
};
|
|
|
|
/**
|
|
* doBreak(sCmd, sAddr, sOptions)
|
|
*
|
|
* As the "help" output below indicates, the following breakpoint commands are supported:
|
|
*
|
|
* bp [a] set exec breakpoint on linear addr [a]
|
|
* br [a] set read breakpoint on linear addr [a]
|
|
* bw [a] set write breakpoint on linear addr [a]
|
|
* bc [a] clear breakpoint on linear addr [a] (use "*" for all breakpoints)
|
|
* bl list breakpoints
|
|
*
|
|
* to which we have recently added the following I/O breakpoint commands:
|
|
*
|
|
* bi [p] toggle input breakpoint on port [p] (use "*" for all input ports)
|
|
* bo [p] toggle output breakpoint on port [p] (use "*" for all output ports)
|
|
*
|
|
* These two new commands operate as toggles so that if "*" is used to trap all input (or output),
|
|
* you can also use these commands to NOT trap specific ports.
|
|
*
|
|
* bn [n] break after [n] instructions
|
|
*
|
|
* TODO: Update the "bl" command to include any/all I/O breakpoints, and the "bc" command to
|
|
* clear them. Because "bi" and "bo" commands are piggy-backing on Bus functions, those breakpoints
|
|
* are currently outside the realm of what the "bl" and "bc" commands are aware of.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {string} sCmd
|
|
* @param {string|undefined} [sAddr]
|
|
* @param {string} [sOptions] (the rest of the breakpoint command-line)
|
|
*/
|
|
DebuggerPDP11.prototype.doBreak = function(sCmd, sAddr, sOptions)
|
|
{
|
|
if (sAddr == '?') {
|
|
this.println("breakpoint commands:");
|
|
this.println("\tbp [a]\tset exec breakpoint at addr [a]");
|
|
this.println("\tbr [a]\tset read breakpoint at addr [a]");
|
|
this.println("\tbw [a]\tset write breakpoint at addr [a]");
|
|
this.println("\tbc [a]\tclear breakpoint at addr [a]");
|
|
this.println("\tbl\tlist all breakpoints");
|
|
this.println("\tbn [n]\tbreak after [n] instruction(s)");
|
|
return;
|
|
}
|
|
|
|
var sParm = sCmd.charAt(1);
|
|
if (sParm == 'l') {
|
|
var cBreaks = 0;
|
|
cBreaks += this.listBreakpoints(this.aBreakExec);
|
|
cBreaks += this.listBreakpoints(this.aBreakRead);
|
|
cBreaks += this.listBreakpoints(this.aBreakWrite);
|
|
if (!cBreaks) this.println("no breakpoints");
|
|
return;
|
|
}
|
|
|
|
if (sParm == 'n') {
|
|
this.nBreakIns = this.parseValue(sAddr);
|
|
this.println("break after " + this.nBreakIns + " instruction(s)");
|
|
return;
|
|
}
|
|
|
|
if (sAddr === undefined) {
|
|
this.println("missing breakpoint address");
|
|
return;
|
|
}
|
|
|
|
var dbgAddr = this.newAddr();
|
|
if (sAddr != '*') {
|
|
dbgAddr = this.parseAddr(sAddr, true, true);
|
|
if (!dbgAddr) return;
|
|
}
|
|
|
|
if (sParm == 'c') {
|
|
if (dbgAddr.addr == null) {
|
|
this.clearBreakpoints();
|
|
this.println("all breakpoints cleared");
|
|
return;
|
|
}
|
|
if (this.findBreakpoint(this.aBreakExec, dbgAddr, true))
|
|
return;
|
|
if (this.findBreakpoint(this.aBreakRead, dbgAddr, true))
|
|
return;
|
|
if (this.findBreakpoint(this.aBreakWrite, dbgAddr, true))
|
|
return;
|
|
this.println("breakpoint missing: " + this.toHexAddr(dbgAddr));
|
|
return;
|
|
}
|
|
|
|
if (dbgAddr.addr == null) return;
|
|
|
|
this.parseAddrOptions(dbgAddr, sOptions);
|
|
|
|
if (sParm == 'p') {
|
|
this.addBreakpoint(this.aBreakExec, dbgAddr);
|
|
return;
|
|
}
|
|
if (sParm == 'r') {
|
|
this.addBreakpoint(this.aBreakRead, dbgAddr);
|
|
return;
|
|
}
|
|
if (sParm == 'w') {
|
|
this.addBreakpoint(this.aBreakWrite, dbgAddr);
|
|
return;
|
|
}
|
|
this.println("unknown breakpoint command: " + sParm);
|
|
};
|
|
|
|
/**
|
|
* doClear(sCmd)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {string} [sCmd] (eg, "cls" or "clear")
|
|
*/
|
|
DebuggerPDP11.prototype.doClear = function(sCmd)
|
|
{
|
|
/*
|
|
* TODO: There should be a clear() component method that the Control Panel overrides to perform this function.
|
|
*/
|
|
if (this.controlPrint) this.controlPrint.value = "";
|
|
};
|
|
|
|
/**
|
|
* doDump(asArgs)
|
|
*
|
|
* The length parameter is interpreted as a number of bytes, in hex, which we convert to the appropriate number
|
|
* of lines, because we always display whole lines. If the length is omitted/undefined, it defaults to 0x80 (128.)
|
|
* bytes, which normally translates to 8 lines.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {Array.<string>} asArgs (formerly sCmd, [sAddr], [sLen] and [sBytes])
|
|
*/
|
|
DebuggerPDP11.prototype.doDump = function(asArgs)
|
|
{
|
|
var m;
|
|
var sCmd = asArgs[0];
|
|
var sAddr = asArgs[1];
|
|
var sLen = asArgs[2];
|
|
var sBytes = asArgs[3];
|
|
|
|
if (sAddr == '?') {
|
|
var sDumpers = "";
|
|
for (m in MessagesPDP11.CATEGORIES) {
|
|
if (this.afnDumpers[m]) {
|
|
if (sDumpers) sDumpers += ',';
|
|
sDumpers = sDumpers + m;
|
|
}
|
|
}
|
|
sDumpers += ",state,symbols";
|
|
this.println("dump memory commands:");
|
|
this.println("\tdb [a] [#] dump # bytes at address a");
|
|
this.println("\tdw [a] [#] dump # words at address a");
|
|
this.println("\tdd [a] [#] dump # dwords at address a");
|
|
this.println("\tdh [#] [#] dump # instructions from history");
|
|
if (sDumpers.length) this.println("dump extension commands:\n\t" + sDumpers);
|
|
return;
|
|
}
|
|
|
|
if (sAddr == "state") {
|
|
var sState = this.cmp.powerOff(true);
|
|
if (sLen == "console") {
|
|
/*
|
|
* Console buffers are notoriously small, and even the following code, which breaks the
|
|
* data into parts (eg, "d state console 1", "d state console 2", etc) just isn't that helpful.
|
|
*
|
|
* var nPart = +sBytes;
|
|
* if (nPart) sState = sState.substr(1000000 * (nPart-1), 1000000);
|
|
*
|
|
* So, the best way to capture a large machine state is to use the new "Save Machine" link
|
|
* that downloads a machine's entire state. Alternatively, run your own local server and use
|
|
* server-side storage. Take a look at the "Save" binding in computer.js, which binds an HTML
|
|
* control to the computer.powerOff() and computer.saveServerState() functions.
|
|
*/
|
|
console.log(sState);
|
|
} else {
|
|
this.doClear();
|
|
this.println(sState);
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (sAddr == "symbols") {
|
|
this.dumpSymbols();
|
|
return;
|
|
}
|
|
|
|
if (sCmd == "d") {
|
|
for (m in MessagesPDP11.CATEGORIES) {
|
|
if (asArgs[1] == m) {
|
|
var fnDumper = this.afnDumpers[m];
|
|
if (fnDumper) {
|
|
asArgs.shift();
|
|
asArgs.shift();
|
|
fnDumper(asArgs);
|
|
} else {
|
|
this.println("no dump registered for " + sAddr);
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
if (!sAddr) sCmd = this.sCmdDumpPrev || "db";
|
|
} else {
|
|
this.sCmdDumpPrev = sCmd;
|
|
}
|
|
|
|
if (sCmd == "dh") {
|
|
this.dumpHistory(sAddr, sLen);
|
|
return;
|
|
}
|
|
|
|
var dbgAddr = this.parseAddr(sAddr);
|
|
if (!dbgAddr) return;
|
|
|
|
var len = 0; // 0 is not a default; it triggers the appropriate default below
|
|
if (sLen) {
|
|
if (sLen.charAt(0) == 'l') {
|
|
sLen = sLen.substr(1) || sBytes;
|
|
}
|
|
len = this.parseValue(sLen) >>> 0; // negative lengths not allowed
|
|
if (len > 0x10000) len = 0x10000; // prevent bad user (or variable) input from producing excessive output
|
|
}
|
|
|
|
var sDump = "";
|
|
var size = (sCmd == "dd"? 4 : (sCmd == "dw"? 2 : 1));
|
|
var cb = (size * len) || 128;
|
|
var cLines = ((cb + 15) >> 4) || 1;
|
|
|
|
while (cLines-- && cb > 0) {
|
|
var data = 0, iByte = 0, i;
|
|
var sData = "", sChars = "";
|
|
sAddr = this.toHexAddr(dbgAddr);
|
|
for (i = 16; i > 0 && cb > 0; i--) {
|
|
var b = this.getByte(dbgAddr, 1);
|
|
data |= (b << (iByte++ << 3));
|
|
if (iByte == size) {
|
|
sData += str.toHex(data, size * 2);
|
|
sData += (size == 1? (i == 9? '-' : ' ') : " ");
|
|
data = iByte = 0;
|
|
}
|
|
sChars += (b >= 32 && b < 128? String.fromCharCode(b) : '.');
|
|
cb--;
|
|
}
|
|
if (sDump) sDump += '\n';
|
|
sDump += sAddr + " " + sData + ((i == 0)? (' ' + sChars) : "");
|
|
}
|
|
|
|
if (sDump) this.println(sDump);
|
|
this.dbgAddrNextData = dbgAddr;
|
|
};
|
|
|
|
/**
|
|
* doEdit(asArgs)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {Array.<string>} asArgs
|
|
*/
|
|
DebuggerPDP11.prototype.doEdit = function(asArgs)
|
|
{
|
|
var size = 1;
|
|
var mask = 0xff;
|
|
var fnGet = this.getByte;
|
|
var fnSet = this.setByte;
|
|
if (asArgs[0] == "ew") {
|
|
size = 2;
|
|
mask = 0xffff;
|
|
fnGet = this.getShort;
|
|
fnSet = this.setShort;
|
|
}
|
|
var cch = size << 1;
|
|
|
|
var sAddr = asArgs[1];
|
|
if (sAddr == null) {
|
|
this.println("edit memory commands:");
|
|
this.println("\teb [a] [...] edit bytes at address a");
|
|
this.println("\tew [a] [...] edit words at address a");
|
|
return;
|
|
}
|
|
|
|
var dbgAddr = this.parseAddr(sAddr);
|
|
if (!dbgAddr) return;
|
|
|
|
for (var i = 2; i < asArgs.length; i++) {
|
|
var vNew = this.parseExpression(asArgs[i]);
|
|
if (vNew === undefined) {
|
|
this.println("unrecognized value: " + asArgs[i]);
|
|
break;
|
|
}
|
|
if (vNew & ~mask) {
|
|
this.println("warning: " + str.toHex(vNew) + " exceeds " + size + "-byte value");
|
|
}
|
|
var vOld = fnGet.call(this, dbgAddr);
|
|
this.println("changing " + this.toHexAddr(dbgAddr) + " from " + str.toHex(vOld, cch, true) + " to " + str.toHex(vNew, cch, true));
|
|
fnSet.call(this, dbgAddr, vNew, size);
|
|
}
|
|
};
|
|
|
|
/**
|
|
* doFreqs(sParm)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {string|undefined} sParm
|
|
*/
|
|
DebuggerPDP11.prototype.doFreqs = function(sParm)
|
|
{
|
|
if (sParm == '?') {
|
|
this.println("frequency commands:");
|
|
this.println("\tclear\tclear all frequency counts");
|
|
return;
|
|
}
|
|
var i;
|
|
var cData = 0;
|
|
if (this.aaOpcodeCounts) {
|
|
if (sParm == "clear") {
|
|
for (i = 0; i < this.aaOpcodeCounts.length; i++)
|
|
this.aaOpcodeCounts[i] = [i, 0];
|
|
this.println("frequency data cleared");
|
|
cData++;
|
|
}
|
|
else if (sParm !== undefined) {
|
|
this.println("unknown frequency command: " + sParm);
|
|
cData++;
|
|
}
|
|
else {
|
|
var aaSortedOpcodeCounts = this.aaOpcodeCounts.slice();
|
|
aaSortedOpcodeCounts.sort(function(p, q) {
|
|
return q[1] - p[1];
|
|
});
|
|
var asOpcodes = DebuggerPDP11.INS_NAMES;
|
|
for (i = 0; i < aaSortedOpcodeCounts.length; i++) {
|
|
var bOpcode = aaSortedOpcodeCounts[i][0];
|
|
var cFreq = aaSortedOpcodeCounts[i][1];
|
|
if (cFreq) {
|
|
this.println((asOpcodes[this.aaOpDescs[bOpcode][0]] + " ").substr(0, 5) + " (" + str.toHexByte(bOpcode) + "): " + cFreq + " times");
|
|
cData++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (!cData) {
|
|
this.println("no frequency data available");
|
|
}
|
|
};
|
|
|
|
/**
|
|
* doHalt(fQuiet)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {boolean} [fQuiet]
|
|
*/
|
|
DebuggerPDP11.prototype.doHalt = function(fQuiet)
|
|
{
|
|
var sMsg;
|
|
if (this.flags.running) {
|
|
sMsg = "halting";
|
|
this.stopCPU();
|
|
} else {
|
|
if (this.isBusy(true)) return;
|
|
sMsg = "already halted";
|
|
}
|
|
if (!fQuiet) this.println(sMsg);
|
|
};
|
|
|
|
/**
|
|
* doIf(sCmd, fQuiet)
|
|
*
|
|
* NOTE: Don't forget that the default base for all numeric constants is 16 (hex), so when you evaluate
|
|
* an expression like "a==10", it will compare the value of the variable "a" to 0x10; use a trailing period
|
|
* (eg, "10.") if you really intend decimal.
|
|
*
|
|
* Also, if no variable named "a" exists, "a" will evaluate to 0x0A, so the expression "a==10" becomes
|
|
* "0x0A==0x10" (false), whereas the expression "a==10." becomes "0x0A==0x0A" (true).
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {string} sCmd
|
|
* @param {boolean} [fQuiet]
|
|
* @return {boolean} true if expression is non-zero, false if zero (or undefined due to a parse error)
|
|
*/
|
|
DebuggerPDP11.prototype.doIf = function(sCmd, fQuiet)
|
|
{
|
|
sCmd = str.trim(sCmd);
|
|
if (!this.parseExpression(sCmd)) {
|
|
if (!fQuiet) this.println("false: " + sCmd);
|
|
return false;
|
|
}
|
|
if (!fQuiet) this.println("true: " + sCmd);
|
|
return true;
|
|
};
|
|
|
|
/**
|
|
* doInfo(asArgs)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {Array.<string>} asArgs
|
|
* @return {boolean} true only if the instruction info command ("n") is supported
|
|
*/
|
|
DebuggerPDP11.prototype.doInfo = function(asArgs)
|
|
{
|
|
if (DEBUG) {
|
|
this.println("msPerYield: " + this.cpu.msPerYield);
|
|
this.println("nCyclesPerYield: " + this.cpu.nCyclesPerYield);
|
|
return true;
|
|
}
|
|
return false;
|
|
};
|
|
|
|
/**
|
|
* doVar(sCmd)
|
|
*
|
|
* The command must be of the form "{variable} = [{expression}]", where expression may contain constants,
|
|
* operators, registers, symbols, other variables, or nothing at all; in the latter case, the variable, if
|
|
* any, is deleted.
|
|
*
|
|
* Other supported shorthand: "var" with no parameters prints the values of all variables, and "var {variable}"
|
|
* prints the value of the specified variable.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {string} sCmd
|
|
* @return {boolean} true if valid "var" assignment, false if not
|
|
*/
|
|
DebuggerPDP11.prototype.doVar = function(sCmd)
|
|
{
|
|
var a = sCmd.match(/^\s*([A-Z_]?[A-Z0-9_]*)\s*(=?)\s*(.*)$/i);
|
|
if (a) {
|
|
if (!a[1]) {
|
|
if (!this.printVariable()) this.println("no variables");
|
|
return true; // it's not considered an error to print an empty list of variables
|
|
}
|
|
if (!a[2]) {
|
|
return this.printVariable(a[1]);
|
|
}
|
|
if (!a[3]) {
|
|
this.delVariable(a[1]);
|
|
return true; // it's not considered an error to delete a variable that didn't exist
|
|
}
|
|
var v = this.parseExpression(a[3]);
|
|
if (v !== undefined) {
|
|
this.setVariable(a[1], v);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
this.println("invalid assignment:" + sCmd);
|
|
return false;
|
|
};
|
|
|
|
/**
|
|
* doList(sAddr, fPrint)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {string} sAddr
|
|
* @param {boolean} [fPrint]
|
|
* @return {string|null}
|
|
*/
|
|
DebuggerPDP11.prototype.doList = function(sAddr, fPrint)
|
|
{
|
|
var sSymbol = null;
|
|
|
|
var dbgAddr = this.parseAddr(sAddr, true);
|
|
if (dbgAddr) {
|
|
var addr = this.getAddr(dbgAddr);
|
|
var aSymbol = this.findSymbol(dbgAddr, true);
|
|
if (aSymbol.length) {
|
|
var nDelta, sDelta, s;
|
|
if (aSymbol[0]) {
|
|
sDelta = "";
|
|
nDelta = dbgAddr.addr - aSymbol[1];
|
|
if (nDelta) sDelta = " + " + str.toHexWord(nDelta);
|
|
s = aSymbol[0] + " (" + this.toHexOffset(aSymbol[1]) + ')' + sDelta;
|
|
if (fPrint) this.println(s);
|
|
sSymbol = s;
|
|
}
|
|
if (aSymbol.length > 4 && aSymbol[4]) {
|
|
sDelta = "";
|
|
nDelta = aSymbol[5] - dbgAddr.addr;
|
|
if (nDelta) sDelta = " - " + str.toHexWord(nDelta);
|
|
s = aSymbol[4] + " (" + this.toHexOffset(aSymbol[5]) + ')' + sDelta;
|
|
if (fPrint) this.println(s);
|
|
if (!sSymbol) sSymbol = s;
|
|
}
|
|
} else {
|
|
if (fPrint) this.println("no symbols");
|
|
}
|
|
}
|
|
return sSymbol;
|
|
};
|
|
|
|
/**
|
|
* doMessages(asArgs)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {Array.<string>} asArgs
|
|
*/
|
|
DebuggerPDP11.prototype.doMessages = function(asArgs)
|
|
{
|
|
var m;
|
|
var fCriteria = null;
|
|
var sCategory = asArgs[1];
|
|
if (sCategory == '?') sCategory = undefined;
|
|
|
|
if (sCategory !== undefined) {
|
|
var bitsMessage = 0;
|
|
if (sCategory == "all") {
|
|
bitsMessage = (0xffffffff|0) & ~(MessagesPDP11.HALT | MessagesPDP11.KEYS | MessagesPDP11.LOG);
|
|
sCategory = null;
|
|
} else if (sCategory == "on") {
|
|
fCriteria = true;
|
|
sCategory = null;
|
|
} else if (sCategory == "off") {
|
|
fCriteria = false;
|
|
sCategory = null;
|
|
} else {
|
|
/*
|
|
* Internally, we use "key" instead of "keys", since the latter is a method on JavasScript objects,
|
|
* but externally, we allow the user to specify "keys"; "kbd" is also allowed as shorthand for "keyboard".
|
|
*/
|
|
if (sCategory == "keys") sCategory = "key";
|
|
if (sCategory == "kbd") sCategory = "keyboard";
|
|
for (m in MessagesPDP11.CATEGORIES) {
|
|
if (sCategory == m) {
|
|
bitsMessage = MessagesPDP11.CATEGORIES[m];
|
|
fCriteria = !!(this.bitsMessage & bitsMessage);
|
|
break;
|
|
}
|
|
}
|
|
if (!bitsMessage) {
|
|
this.println("unknown message category: " + sCategory);
|
|
return;
|
|
}
|
|
}
|
|
if (bitsMessage) {
|
|
if (asArgs[2] == "on") {
|
|
this.bitsMessage |= bitsMessage;
|
|
fCriteria = true;
|
|
}
|
|
else if (asArgs[2] == "off") {
|
|
this.bitsMessage &= ~bitsMessage;
|
|
fCriteria = false;
|
|
if (bitsMessage == MessagesPDP11.BUFFER) {
|
|
for (var i = 0; i < this.aMessageBuffer.length; i++) {
|
|
this.println(this.aMessageBuffer[i]);
|
|
}
|
|
this.aMessageBuffer = [];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Display those message categories that match the current criteria (on or off)
|
|
*/
|
|
var n = 0;
|
|
var sCategories = "";
|
|
for (m in MessagesPDP11.CATEGORIES) {
|
|
if (!sCategory || sCategory == m) {
|
|
var bitMessage = MessagesPDP11.CATEGORIES[m];
|
|
var fEnabled = !!(this.bitsMessage & bitMessage);
|
|
if (fCriteria !== null && fCriteria != fEnabled) continue;
|
|
if (sCategories) sCategories += ',';
|
|
if (!(++n % 10)) sCategories += "\n\t"; // jshint ignore:line
|
|
/*
|
|
* Internally, we use "key" instead of "keys", since the latter is a method on JavasScript objects,
|
|
* but externally, we allow the user to specify "keys".
|
|
*/
|
|
if (m == "key") m = "keys";
|
|
sCategories += m;
|
|
}
|
|
}
|
|
|
|
if (sCategory === undefined) {
|
|
this.println("message commands:\n\tm [category] [on|off]\tturn categories on/off");
|
|
}
|
|
|
|
this.println((fCriteria !== null? (fCriteria? "messages on: " : "messages off: ") : "message categories:\n\t") + (sCategories || "none"));
|
|
|
|
this.historyInit(); // call this just in case MessagesPDP11.INT was turned on
|
|
};
|
|
|
|
/**
|
|
* doOptions(asArgs)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {Array.<string>} asArgs
|
|
*/
|
|
DebuggerPDP11.prototype.doOptions = function(asArgs)
|
|
{
|
|
switch (asArgs[1]) {
|
|
case "cs":
|
|
var nCycles;
|
|
if (asArgs[3] !== undefined) nCycles = +asArgs[3]; // warning: decimal instead of hex conversion
|
|
switch (asArgs[2]) {
|
|
case "int":
|
|
this.cpu.nCyclesChecksumInterval = nCycles;
|
|
break;
|
|
case "start":
|
|
this.cpu.nCyclesChecksumStart = nCycles;
|
|
break;
|
|
case "stop":
|
|
this.cpu.nCyclesChecksumStop = nCycles;
|
|
break;
|
|
default:
|
|
this.println("unknown cs option");
|
|
return;
|
|
}
|
|
if (nCycles !== undefined) {
|
|
this.cpu.resetChecksum();
|
|
}
|
|
this.println("checksums " + (this.cpu.flags.checksum? "enabled" : "disabled"));
|
|
return;
|
|
|
|
case "sp":
|
|
if (asArgs[2] !== undefined) {
|
|
if (!this.cpu.setSpeed(+asArgs[2])) {
|
|
this.println("warning: using 1x multiplier, previous target not reached");
|
|
}
|
|
}
|
|
this.println("target speed: " + this.cpu.getSpeedTarget() + " (" + this.cpu.getSpeed() + "x)");
|
|
return;
|
|
|
|
case "?":
|
|
this.println("debugger options:");
|
|
this.println("\tcs int #\tset checksum cycle interval to #");
|
|
this.println("\tcs start #\tset checksum cycle start count to #");
|
|
this.println("\tcs stop #\tset checksum cycle stop count to #");
|
|
this.println("\tsp #\t\tset speed multiplier to #");
|
|
break;
|
|
|
|
default:
|
|
if (asArgs[1]) {
|
|
this.println("unknown option: " + asArgs[1]);
|
|
return;
|
|
}
|
|
break;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* doRegisters(asArgs, fInstruction)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {Array.<string>} [asArgs]
|
|
* @param {boolean} [fInstruction] (true to include the current instruction; default is true)
|
|
*/
|
|
DebuggerPDP11.prototype.doRegisters = function(asArgs, fInstruction)
|
|
{
|
|
if (asArgs && asArgs[1] == '?') {
|
|
this.println("register commands:");
|
|
this.println("\tr\tdump registers");
|
|
this.println("\trx [#]\tset flag or register x to [#]");
|
|
return;
|
|
}
|
|
|
|
var cpu = this.cpu;
|
|
if (fInstruction == null) fInstruction = true;
|
|
|
|
if (asArgs != null && asArgs.length > 1) {
|
|
var sReg = asArgs[1];
|
|
var sValue = null;
|
|
var i = sReg.indexOf('=');
|
|
if (i > 0) {
|
|
sValue = sReg.substr(i + 1);
|
|
sReg = sReg.substr(0, i);
|
|
}
|
|
else if (asArgs.length > 2) {
|
|
sValue = asArgs[2];
|
|
}
|
|
else {
|
|
this.println("missing value for " + asArgs[1]);
|
|
return;
|
|
}
|
|
|
|
var fValid = false;
|
|
var w = this.parseExpression(sValue);
|
|
|
|
if (w !== undefined) {
|
|
fValid = true;
|
|
var sRegMatch = sReg.toUpperCase();
|
|
switch (sRegMatch) {
|
|
case "PC":
|
|
cpu.setPC(w);
|
|
this.dbgAddrNextCode = this.newAddr(cpu.getPC());
|
|
break;
|
|
case "CF":
|
|
if (w) cpu.setCF(); else cpu.clearCF();
|
|
break;
|
|
case "ZF":
|
|
if (w) cpu.setZF(); else cpu.clearZF();
|
|
break;
|
|
case "SF":
|
|
if (w) cpu.setSF(); else cpu.clearSF();
|
|
break;
|
|
default:
|
|
this.println("unknown register: " + sReg);
|
|
return;
|
|
}
|
|
}
|
|
if (!fValid) {
|
|
this.println("invalid value: " + sValue);
|
|
return;
|
|
}
|
|
cpu.updateCPU();
|
|
this.println("updated registers:");
|
|
}
|
|
|
|
this.println(this.getRegDump());
|
|
|
|
if (fInstruction) {
|
|
this.dbgAddrNextCode = this.newAddr(cpu.getPC());
|
|
this.doUnassemble(this.toHexAddr(this.dbgAddrNextCode));
|
|
}
|
|
};
|
|
|
|
/**
|
|
* doRun(sCmd, sAddr, sOptions, fQuiet)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {string} sCmd
|
|
* @param {string|undefined} [sAddr]
|
|
* @param {string} [sOptions] (the rest of the breakpoint command-line)
|
|
* @param {boolean} [fQuiet]
|
|
*/
|
|
DebuggerPDP11.prototype.doRun = function(sCmd, sAddr, sOptions, fQuiet)
|
|
{
|
|
if (sCmd == "gt") {
|
|
this.fIgnoreNextCheckFault = true;
|
|
}
|
|
if (sAddr !== undefined) {
|
|
var dbgAddr = this.parseAddr(sAddr, true);
|
|
if (!dbgAddr) return;
|
|
this.parseAddrOptions(dbgAddr, sOptions);
|
|
this.setTempBreakpoint(dbgAddr);
|
|
}
|
|
if (!this.runCPU(true)) {
|
|
if (!fQuiet) this.println("cpu busy or unavailable, run command ignored");
|
|
}
|
|
};
|
|
|
|
/**
|
|
* doPrint(sCmd)
|
|
*
|
|
* NOTE: If the string to print is a quoted string, then we run it through replaceRegs(), so that
|
|
* you can take advantage of all the special replacement options used for software interrupt logging.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {string} sCmd
|
|
*/
|
|
DebuggerPDP11.prototype.doPrint = function(sCmd)
|
|
{
|
|
sCmd = str.trim(sCmd);
|
|
var a = sCmd.match(/^(['"])(.*?)\1$/);
|
|
if (!a) {
|
|
this.parseExpression(sCmd, true);
|
|
} else {
|
|
this.println(this.replaceRegs(a[2]));
|
|
}
|
|
};
|
|
|
|
/**
|
|
* doStep(sCmd)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {string} [sCmd] "p" or "pr"
|
|
*/
|
|
DebuggerPDP11.prototype.doStep = function(sCmd)
|
|
{
|
|
var fCallStep = true;
|
|
var fRegs = (sCmd == "pr"? 1 : 0);
|
|
/*
|
|
* Set up the value for this.nStep (ie, 1 or 2) depending on whether the user wants
|
|
* a subsequent register dump ("pr") or not ("p").
|
|
*/
|
|
var nStep = 1 + fRegs;
|
|
if (!this.nStep) {
|
|
var dbgAddr = this.newAddr(this.cpu.getPC());
|
|
var bOpcode = this.getByte(dbgAddr);
|
|
|
|
/*
|
|
switch (bOpcode) {
|
|
case PDP11.OPCODE.CALL:
|
|
if (fCallStep) {
|
|
this.nStep = nStep;
|
|
this.incAddr(dbgAddr, 3);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
*/
|
|
|
|
if (this.nStep) {
|
|
this.setTempBreakpoint(dbgAddr);
|
|
if (!this.runCPU()) {
|
|
if (this.cmp) this.cmp.updateFocus();
|
|
this.nStep = 0;
|
|
}
|
|
/*
|
|
* A successful run will ultimately call stop(), which will in turn call clearTempBreakpoint(),
|
|
* which will clear nStep, so there's your assurance that nStep will be reset. Now we may have
|
|
* stopped for reasons unrelated to the temporary breakpoint, but that's OK.
|
|
*/
|
|
} else {
|
|
this.doTrace(fRegs? "tr" : "t");
|
|
}
|
|
} else {
|
|
this.println("step in progress");
|
|
}
|
|
};
|
|
|
|
/**
|
|
* getCall(dbgAddr)
|
|
*
|
|
* Given a possible return address (typically from the stack), look for a matching CALL (or INT) that
|
|
* immediately precedes that address.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {DbgAddrPDP11} dbgAddr
|
|
* @return {string|null} CALL instruction at or near dbgAddr, or null if none
|
|
*/
|
|
DebuggerPDP11.prototype.getCall = function(dbgAddr)
|
|
{
|
|
var sCall = null;
|
|
var addr = dbgAddr.addr;
|
|
var addrOrig = addr;
|
|
for (var n = 1; n <= 6 && !!addr; n++) {
|
|
if (n > 2) {
|
|
dbgAddr.addr = addr;
|
|
var s = this.getInstruction(dbgAddr);
|
|
if (s.indexOf("CALL") >= 0) {
|
|
/*
|
|
* Verify that the length of this CALL (or INT), when added to the address of the CALL (or INT),
|
|
* matches the original return address. We do this by getting the string index of the opcode bytes,
|
|
* subtracting that from the string index of the next space, and dividing that difference by two,
|
|
* to yield the length of the CALL (or INT) instruction, in bytes.
|
|
*/
|
|
var i = s.indexOf(' ');
|
|
var j = s.indexOf(' ', i+1);
|
|
if (addr + (j - i - 1)/2 == addrOrig) {
|
|
sCall = s;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
addr--;
|
|
}
|
|
dbgAddr.addr = addrOrig;
|
|
return sCall;
|
|
};
|
|
|
|
/**
|
|
* doStackTrace(sCmd, sAddr)
|
|
*
|
|
* Use "k" for a normal stack trace and "ks" for a stack trace with symbolic info.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {string} [sCmd]
|
|
* @param {string} [sAddr] (not used yet)
|
|
*/
|
|
DebuggerPDP11.prototype.doStackTrace = function(sCmd, sAddr)
|
|
{
|
|
if (sAddr == '?') {
|
|
this.println("stack trace commands:");
|
|
this.println("\tk\tshow frame addresses");
|
|
this.println("\tks\tshow symbol information");
|
|
return;
|
|
}
|
|
|
|
var nFrames = 10, cFrames = 0;
|
|
var dbgAddrCall = this.newAddr();
|
|
var dbgAddrStack = this.newAddr(this.cpu.getSP());
|
|
this.println("stack trace for " + this.toHexAddr(dbgAddrStack));
|
|
|
|
while (cFrames < nFrames) {
|
|
var sCall = null, sCallPrev = null, cTests = 256;
|
|
while ((dbgAddrStack.addr >>> 0) < 0x10000) {
|
|
dbgAddrCall.addr = this.getWord(dbgAddrStack, true);
|
|
/*
|
|
* Because we're using the auto-increment feature of getWord(), and because that will automatically
|
|
* wrap the offset around the end of the segment, we must also check the addr property to detect the wrap.
|
|
*/
|
|
if (dbgAddrStack.addr == null || !cTests--) break;
|
|
sCall = this.getCall(dbgAddrCall);
|
|
if (sCall) break;
|
|
}
|
|
/*
|
|
* The sCallPrev check eliminates duplicate sequential calls, which are usually (but not always)
|
|
* indicative of a false positive, in which case the previous call is probably bogus as well, but
|
|
* at least we won't duplicate that mistake. Of course, there are always exceptions, recursion
|
|
* being one of them, but it's rare that we're debugging recursive code.
|
|
*/
|
|
if (!sCall || sCall == sCallPrev) break;
|
|
var sSymbol = null;
|
|
if (sCmd == "ks") {
|
|
var a = sCall.match(/[0-9A-F]+$/);
|
|
if (a) sSymbol = this.doList(a[0]);
|
|
}
|
|
sCall = str.pad(sCall, 50) + " ;" + (sSymbol || "stack=" + this.toHexAddr(dbgAddrStack)); // + " return=" + this.toHexAddr(dbgAddrCall));
|
|
this.println(sCall);
|
|
sCallPrev = sCall;
|
|
cFrames++;
|
|
}
|
|
if (!cFrames) this.println("no return addresses found");
|
|
};
|
|
|
|
/**
|
|
* doTrace(sCmd, sCount)
|
|
*
|
|
* The "t" and "tr" commands interpret the count as a number of instructions, and since
|
|
* we call the Debugger's stepCPU() for each iteration, a single instruction includes
|
|
* any/all prefixes; the CPU's stepCPU() treats prefixes as discrete operations. The only
|
|
* difference between "t" and "tr": the former displays only the next instruction, while
|
|
* the latter also displays the (updated) registers.
|
|
*
|
|
* The "tc" command interprets the count as a number of cycles rather than instructions,
|
|
* allowing you to quickly execute large chunks of instructions with a single command; it
|
|
* doesn't display anything until the the chunk has finished.
|
|
*
|
|
* However, generally a more useful command is "bn", which allows you to break after some
|
|
* number of instructions have been executed (as opposed to some number of cycles).
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {string} [sCmd] ("t", "tc", or "tr")
|
|
* @param {string} [sCount] # of instructions to step
|
|
*/
|
|
DebuggerPDP11.prototype.doTrace = function(sCmd, sCount)
|
|
{
|
|
var dbg = this;
|
|
var fRegs = (sCmd != "t");
|
|
var nCount = this.parseValue(sCount, null, true) || 1;
|
|
var nCycles = (nCount == 1? 0 : 1);
|
|
if (sCmd == "tc") {
|
|
nCycles = nCount;
|
|
nCount = 1;
|
|
}
|
|
web.onCountRepeat(
|
|
nCount,
|
|
function onCountStep() {
|
|
return dbg.setBusy(true) && dbg.stepCPU(nCycles, fRegs, false);
|
|
},
|
|
function onCountStepComplete() {
|
|
/*
|
|
* We explicitly called stepCPU() with fUpdateCPU === false, because repeatedly
|
|
* calling updateCPU() can be very slow, especially when fDisplayLiveRegs is true,
|
|
* so once the repeat count has been exhausted, we must perform a final updateCPU().
|
|
*/
|
|
dbg.cpu.updateCPU();
|
|
dbg.setBusy(false);
|
|
}
|
|
);
|
|
};
|
|
|
|
/**
|
|
* doUnassemble(sAddr, sAddrEnd, n)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {string} [sAddr]
|
|
* @param {string} [sAddrEnd]
|
|
* @param {number} [n]
|
|
*/
|
|
DebuggerPDP11.prototype.doUnassemble = function(sAddr, sAddrEnd, n)
|
|
{
|
|
var dbgAddr = this.parseAddr(sAddr, true);
|
|
if (!dbgAddr) return;
|
|
|
|
if (n === undefined) n = 1;
|
|
|
|
var cb = 0x100;
|
|
if (sAddrEnd !== undefined) {
|
|
|
|
var dbgAddrEnd = this.parseAddr(sAddrEnd, true);
|
|
if (!dbgAddrEnd || dbgAddrEnd.addr < dbgAddr.addr) return;
|
|
|
|
cb = dbgAddrEnd.addr - dbgAddr.addr;
|
|
if (!DEBUG && cb > 0x100) {
|
|
/*
|
|
* Limiting the amount of disassembled code to 256 bytes in non-DEBUG builds is partly to
|
|
* prevent the user from wedging the browser by dumping too many lines, but also a recognition
|
|
* that, in non-DEBUG builds, this.println() keeps print output buffer truncated to 8Kb anyway.
|
|
*/
|
|
this.println("range too large");
|
|
return;
|
|
}
|
|
n = -1;
|
|
}
|
|
|
|
var cLines = 0;
|
|
var sInstruction;
|
|
|
|
while (cb > 0 && n--) {
|
|
|
|
var nSequence = (this.isBusy(false) || this.nStep)? this.nCycles : null;
|
|
var sComment = (nSequence != null? "cycles" : null);
|
|
var aSymbol = this.findSymbol(dbgAddr);
|
|
|
|
var addr = dbgAddr.addr; // we snap dbgAddr.addr *after* calling findSymbol(), which re-evaluates it
|
|
|
|
if (aSymbol[0] && n) {
|
|
if (!cLines && n || aSymbol[0].indexOf('+') < 0) {
|
|
var sLabel = aSymbol[0] + ':';
|
|
if (aSymbol[2]) sLabel += ' ' + aSymbol[2];
|
|
this.println(sLabel);
|
|
}
|
|
}
|
|
|
|
if (aSymbol[3]) {
|
|
sComment = aSymbol[3];
|
|
nSequence = null;
|
|
}
|
|
|
|
sInstruction = this.getInstruction(dbgAddr, sComment, nSequence);
|
|
|
|
this.println(sInstruction);
|
|
this.dbgAddrNextCode = dbgAddr;
|
|
cb -= dbgAddr.addr - addr;
|
|
cLines++;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* shiftArgs(asArgs)
|
|
*
|
|
* Used with any command (eg, "r") that allows but doesn't require whitespace between command and first argument.
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {Array.<string>} asArgs
|
|
* @return {Array.<string>}
|
|
*/
|
|
DebuggerPDP11.prototype.shiftArgs = function(asArgs)
|
|
{
|
|
if (asArgs && asArgs.length) {
|
|
var s0 = asArgs[0];
|
|
var ch0 = s0.charAt(0);
|
|
for (var i = 1; i < s0.length; i++) {
|
|
var ch = s0.charAt(i);
|
|
if (ch0 == '?' || ch0 == 'r' || ch < 'a' || ch > 'z') {
|
|
asArgs[0] = s0.substr(i);
|
|
asArgs.unshift(s0.substr(0, i));
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return asArgs;
|
|
};
|
|
|
|
/**
|
|
* doCommand(sCmd, fQuiet)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {string} sCmd
|
|
* @param {boolean} [fQuiet]
|
|
* @return {boolean} true if command processed, false if unrecognized
|
|
*/
|
|
DebuggerPDP11.prototype.doCommand = function(sCmd, fQuiet)
|
|
{
|
|
var result = true;
|
|
|
|
try {
|
|
if (!sCmd.length || sCmd == "end") {
|
|
if (this.fAssemble) {
|
|
this.println("ended assemble at " + this.toHexAddr(this.dbgAddrAssemble));
|
|
this.dbgAddrNextCode = this.dbgAddrAssemble;
|
|
this.fAssemble = false;
|
|
}
|
|
sCmd = "";
|
|
}
|
|
else if (!fQuiet) {
|
|
var sPrompt = ">> ";
|
|
this.println(sPrompt + sCmd);
|
|
}
|
|
|
|
var ch = sCmd.charAt(0);
|
|
if (ch == '"' || ch == "'") return true;
|
|
|
|
/*
|
|
* Zap the previous message buffer to ensure the new command's output is not tossed out as a repeat.
|
|
*/
|
|
this.sMessagePrev = null;
|
|
|
|
/*
|
|
* I've relaxed the !isBusy() requirement, to maximize our ability to issue Debugger commands externally.
|
|
*/
|
|
if (this.isReady() /* && !this.isBusy(true) */ && sCmd.length > 0) {
|
|
|
|
if (this.fAssemble) {
|
|
sCmd = "a " + this.toHexAddr(this.dbgAddrAssemble) + ' ' + sCmd;
|
|
}
|
|
|
|
var asArgs = this.shiftArgs(sCmd.replace(/ +/g, ' ').split(' '));
|
|
|
|
switch (asArgs[0].charAt(0)) {
|
|
case 'a':
|
|
this.doAssemble(asArgs);
|
|
break;
|
|
case 'b':
|
|
this.doBreak(asArgs[0], asArgs[1], sCmd);
|
|
break;
|
|
case 'c':
|
|
this.doClear(asArgs[0]);
|
|
break;
|
|
case 'd':
|
|
if (!COMPILED && sCmd == "debug") {
|
|
window.DEBUG = true;
|
|
this.println("DEBUG checks on");
|
|
break;
|
|
}
|
|
this.doDump(asArgs);
|
|
break;
|
|
case 'e':
|
|
if (asArgs[0] == "else") break;
|
|
this.doEdit(asArgs);
|
|
break;
|
|
case 'f':
|
|
this.doFreqs(asArgs[1]);
|
|
break;
|
|
case 'g':
|
|
this.doRun(asArgs[0], asArgs[1], sCmd, fQuiet);
|
|
break;
|
|
case 'h':
|
|
this.doHalt(fQuiet);
|
|
break;
|
|
case 'i':
|
|
if (asArgs[0] == "if") {
|
|
if (!this.doIf(sCmd.substr(2), fQuiet)) {
|
|
result = false;
|
|
}
|
|
}
|
|
break;
|
|
case 'k':
|
|
this.doStackTrace(asArgs[0], asArgs[1]);
|
|
break;
|
|
case 'l':
|
|
if (asArgs[0] == "ln") {
|
|
this.doList(asArgs[1], true);
|
|
break;
|
|
}
|
|
break;
|
|
case 'm':
|
|
this.doMessages(asArgs);
|
|
break;
|
|
case 'p':
|
|
if (asArgs[0] == "print") {
|
|
this.doPrint(sCmd.substr(5));
|
|
break;
|
|
}
|
|
this.doStep(asArgs[0]);
|
|
break;
|
|
case 'r':
|
|
if (sCmd == "reset") {
|
|
if (this.cmp) this.cmp.reset();
|
|
break;
|
|
}
|
|
this.doRegisters(asArgs);
|
|
break;
|
|
case 's':
|
|
this.doOptions(asArgs);
|
|
break;
|
|
case 't':
|
|
this.doTrace(asArgs[0], asArgs[1]);
|
|
break;
|
|
case 'u':
|
|
this.doUnassemble(asArgs[1], asArgs[2], 8);
|
|
break;
|
|
case 'v':
|
|
if (asArgs[0] == "var") {
|
|
if (!this.doVar(sCmd.substr(3))) {
|
|
result = false;
|
|
}
|
|
break;
|
|
}
|
|
this.println((PDP11.APPNAME || "PDP11") + " version " + (XMLVERSION || PDP11.APPVERSION) + " (" + this.cpu.model + (PDP11.COMPILED? ",RELEASE" : (PDP11.DEBUG? ",DEBUG" : ",NODEBUG")) + (PDP11.TYPEDARRAYS? ",TYPEDARRAYS" : (PDP11.BYTEARRAYS? ",BYTEARRAYS" : ",LONGARRAYS")) + ')');
|
|
this.println(web.getUserAgent());
|
|
break;
|
|
case '?':
|
|
if (asArgs[1]) {
|
|
this.doPrint(sCmd.substr(1));
|
|
break;
|
|
}
|
|
this.doHelp();
|
|
break;
|
|
case 'n':
|
|
if (!COMPILED && sCmd == "nodebug") {
|
|
window.DEBUG = false;
|
|
this.println("DEBUG checks off");
|
|
break;
|
|
}
|
|
if (this.doInfo(asArgs)) break;
|
|
/* falls through */
|
|
default:
|
|
this.println("unknown command: " + sCmd);
|
|
result = false;
|
|
break;
|
|
}
|
|
}
|
|
} catch(e) {
|
|
this.println("debugger error: " + (e.stack || e.message));
|
|
result = false;
|
|
}
|
|
return result;
|
|
};
|
|
|
|
/**
|
|
* doCommands(sCmds, fSave)
|
|
*
|
|
* @this {DebuggerPDP11}
|
|
* @param {string} sCmds
|
|
* @param {boolean} [fSave]
|
|
* @return {boolean} true if all commands processed, false if not
|
|
*/
|
|
DebuggerPDP11.prototype.doCommands = function(sCmds, fSave)
|
|
{
|
|
var a = this.parseCommand(sCmds, fSave);
|
|
for (var s in a) {
|
|
if (!this.doCommand(a[s])) return false;
|
|
}
|
|
return true;
|
|
};
|
|
|
|
/**
|
|
* DebuggerPDP11.init()
|
|
*
|
|
* This function operates on every HTML element of class "debugger", extracting the
|
|
* JSON-encoded parameters for the Debugger constructor from the element's "data-value"
|
|
* attribute, invoking the constructor to create a Debugger component, and then binding
|
|
* any associated HTML controls to the new component.
|
|
*/
|
|
DebuggerPDP11.init = function()
|
|
{
|
|
var aeDbg = Component.getElementsByClass(document, PDP11.APPCLASS, "debugger");
|
|
for (var iDbg = 0; iDbg < aeDbg.length; iDbg++) {
|
|
var eDbg = aeDbg[iDbg];
|
|
var parmsDbg = Component.getComponentParms(eDbg);
|
|
var dbg = new DebuggerPDP11(parmsDbg);
|
|
Component.bindComponentControls(dbg, eDbg, PDP11.APPCLASS);
|
|
}
|
|
};
|
|
|
|
/*
|
|
* Initialize every Debugger module on the page (as IF there's ever going to be more than one ;-))
|
|
*/
|
|
web.onInit(DebuggerPDP11.init);
|
|
|
|
} // endif DEBUGGER
|
|
|
|
if (NODE) module.exports = DebuggerPDP11;
|