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Improved fixup handling for better MACRO-10 support

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This commit is contained in:
Jeff 2017-03-16 00:32:30 -07:00 • committed by Jeff Parsons
commit 0e8e2ed4a2
12 changed files with 975 additions and 916 deletions
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308
docs/pcx86/examples/pcx86-dbg.js
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File diff suppressed because one or more lines are too long

9
modules/pc6502/lib/debugger.js
View file

@ -959,7 +959,7 @@ if (DEBUGGER) {
};
/**
* parseAddr(sAddr, fCode, fNoChecks, fPrint)
* parseAddr(sAddr, fCode, fNoChecks)
*
* Address evaluation and validation (eg, range checks) are no longer performed at this stage. That's
* done later, by getAddr(), which returns CPUDef.ADDR_INVALID for invalid segments, out-of-range offsets,
@ -972,10 +972,9 @@ if (DEBUGGER) {
* @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 {DbgAddr6502|null|undefined}
*/
Debugger6502.prototype.parseAddr = function(sAddr, fCode, fNoChecks, fPrint)
Debugger6502.prototype.parseAddr = function(sAddr, fCode, fNoChecks)
{
var dbgAddr;
var dbgAddrNext = (fCode? this.dbgAddrNextCode : this.dbgAddrNextData);
@ -984,7 +983,7 @@ if (DEBUGGER) {
sAddr = this.parseReference(sAddr);
dbgAddr = this.findSymbolAddr(sAddr);
if (dbgAddr) return dbgAddr;
addr = this.parseExpression(sAddr, fPrint);
addr = this.parseExpression(sAddr);
}
if (addr != null) {
dbgAddr = this.newAddr(addr);
@ -3801,7 +3800,7 @@ if (DEBUGGER) {
sCmd = str.trim(sCmd);
var a = sCmd.match(/^(['"])(.*?)\1$/);
if (!a) {
this.parseExpression(sCmd, true);
this.parseExpression(sCmd, false);
} else {
this.println(this.replaceRegs(a[2]));
}

9
modules/pc8080/lib/debugger.js
View file

@ -473,7 +473,7 @@ class Debugger8080 extends Debugger {
}
/**
* parseAddr(sAddr, fCode, fNoChecks, fPrint)
* parseAddr(sAddr, fCode, fNoChecks)
*
* Address evaluation and validation (eg, range checks) are no longer performed at this stage. That's
* done later, by getAddr(), which returns CPUDef8080.ADDR_INVALID for invalid segments, out-of-range offsets,
@ -486,10 +486,9 @@ class Debugger8080 extends Debugger {
* @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 {DbgAddr8080|null|undefined}
*/
parseAddr(sAddr, fCode, fNoChecks, fPrint)
parseAddr(sAddr, fCode, fNoChecks)
{
var dbgAddr;
var dbgAddrNext = (fCode? this.dbgAddrNextCode : this.dbgAddrNextData);
@ -498,7 +497,7 @@ class Debugger8080 extends Debugger {
sAddr = this.parseReference(sAddr) || sAddr;
dbgAddr = this.findSymbolAddr(sAddr);
if (dbgAddr) return dbgAddr;
addr = this.parseExpression(sAddr, fPrint);
addr = this.parseExpression(sAddr);
}
if (addr != null) {
dbgAddr = this.newAddr(addr);
@ -3337,7 +3336,7 @@ class Debugger8080 extends Debugger {
sCmd = Str.trim(sCmd);
var a = sCmd.match(/^(['"])(.*?)\1$/);
if (!a) {
this.parseExpression(sCmd, true);
this.parseExpression(sCmd, false);
} else {
this.println(this.replaceRegs(a[2]));
}

18
modules/pcx86/lib/debugger.js
View file

@ -1375,7 +1375,7 @@ class DebuggerX86 extends Debugger {
}
/**
* parseAddr(sAddr, fCode, fNoChecks, fPrint)
* parseAddr(sAddr, fCode, fNoChecks, fQuiet)
*
* As discussed above, dbgAddr variables contain one or more of: off, sel, and addr. They represent
* a segmented address (sel:off) when sel is defined or a linear address (addr) when sel is undefined
@ -1400,10 +1400,10 @@ class DebuggerX86 extends Debugger {
* @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]
* @param {boolean} [fQuiet]
* @return {DbgAddrX86|null|undefined}
*/
parseAddr(sAddr, fCode, fNoChecks, fPrint)
parseAddr(sAddr, fCode, fNoChecks, fQuiet)
{
var dbgAddr;
var dbgAddrNext = (fCode? this.dbgAddrNextCode : this.dbgAddrNextData);
@ -1451,16 +1451,16 @@ class DebuggerX86 extends Debugger {
if (iColon < 0) {
if (sel != null) {
off = this.parseExpression(sAddr, fPrint);
off = this.parseExpression(sAddr, fQuiet);
addr = null;
} else {
addr = this.parseExpression(sAddr, fPrint);
addr = this.parseExpression(sAddr, fQuiet);
if (addr == null) off = null;
}
}
else {
sel = this.parseExpression(sAddr.substring(0, iColon), fPrint);
off = this.parseExpression(sAddr.substring(iColon + 1), fPrint);
sel = this.parseExpression(sAddr.substring(0, iColon), fQuiet);
off = this.parseExpression(sAddr.substring(iColon + 1), fQuiet);
addr = null;
}
}
@ -1598,7 +1598,7 @@ class DebuggerX86 extends Debugger {
var sInfo = "no information";
if (BACKTRACK) {
var sAddr = asArgs[0];
var dbgAddr = this.parseAddr(sAddr, true, true, false);
var dbgAddr = this.parseAddr(sAddr, true, true, true);
if (dbgAddr) {
var addr = this.getAddr(dbgAddr);
if (dbgAddr.type != DebuggerX86.ADDRTYPE.PHYSICAL) {
@ -5907,7 +5907,7 @@ class DebuggerX86 extends Debugger {
sCmd = Str.trim(sCmd);
var a = sCmd.match(/^(['"])(.*?)\1$/);
if (!a) {
this.parseExpression(sCmd, true);
this.parseExpression(sCmd, false);
} else {
this.println(this.replaceRegs(a[2]));
}

43
modules/pdp10/lib/debugger.js
View file

@ -502,7 +502,7 @@ class DebuggerPDP10 extends Debugger {
}
/**
* parseAddr(sAddr, dbgAddr, fPrint)
* parseAddr(sAddr, dbgAddr)
*
* Address evaluation and validation (eg, range checks) are no longer performed at this stage. That's
* done later, by getAddr(), which returns PDP10.ADDR_INVALID for invalid segments, out-of-range offsets,
@ -514,10 +514,9 @@ class DebuggerPDP10 extends Debugger {
* @this {DebuggerPDP10}
* @param {string|undefined} sAddr
* @param {DbgAddrPDP10} [dbgAddr]
* @param {boolean} [fPrint]
* @return {DbgAddrPDP10|null|undefined}
*/
parseAddr(sAddr, dbgAddr, fPrint)
parseAddr(sAddr, dbgAddr)
{
var fPhysical, nBase;
if (!dbgAddr) dbgAddr = this.newAddr();
@ -538,7 +537,7 @@ class DebuggerPDP10 extends Debugger {
} else if (sAddr.indexOf('.') >= 0) {
nBase = 10;
}
addr = this.parseExpression(sAddr, fPrint);
addr = this.parseExpression(sAddr);
}
if (addr != null) {
addr = this.validateWord(addr, this.nBusWidth);
@ -1611,19 +1610,27 @@ class DebuggerPDP10 extends Debugger {
}
/**
* parseInstruction(sOpcode, sOperands, addr)
* parseInstruction(sOpcode, sOperands, addr, fQuiet)
*
* @this {DebuggerPDP10}
* @param {string} sOpcode
* @param {string} [sOperands]
* @param {number} [addr] of memory where this instruction is being assembled
* @param {boolean} [fQuiet]
* @return {number} (opcode, or -1 if unrecognized instruction)
*/
parseInstruction(sOpcode, sOperands, addr)
parseInstruction(sOpcode, sOperands, addr, fQuiet)
{
var opCode = -1;
var opMask, opNum;
/*
* It's best to always clear sUndefined up front, because the caller won't
* necessarily know whether or not we had to call parseExpression() for this
* instruction.
*/
this.sUndefined = null;
if (!sOpcode) {
/*
* MACRO-10 permits instructions to be assembled without an explicit opcode;
@ -1700,7 +1707,7 @@ class DebuggerPDP10 extends Debugger {
var sOperand = aOperands[i].trim();
if (!sOperand) continue;
if (i > 1) {
this.println("too many operands: " + sOperand);
this.println("too many operands: " + sOperands);
opCode = -1;
break;
}
@ -1722,7 +1729,7 @@ class DebuggerPDP10 extends Debugger {
sOperand = sOperand.replace(/(^|[^0-9])\./g, "$1" + this.toStrOffset(addr));
}
}
var operand = this.parseExpression(sOperand);
var operand = this.parseExpression(sOperand, fQuiet);
if (operand == undefined) {
opCode = -1;
break;
@ -1751,7 +1758,7 @@ class DebuggerPDP10 extends Debugger {
opCode += operand;
sOperand = match[3];
if (sOperand) {
operand = this.parseExpression(sOperand);
operand = this.parseExpression(sOperand, fQuiet);
if (operand == undefined) {
opCode = -1;
break;
@ -1774,7 +1781,7 @@ class DebuggerPDP10 extends Debugger {
// }
}
if (opCode < 0 && sOperands != null) {
if (opCode < 0 && !fQuiet) {
this.println("unknown instruction: " + sOpcode + ' ' + sOperands);
}
@ -2591,12 +2598,22 @@ class DebuggerPDP10 extends Debugger {
dbg.println("assembly already in progress");
}
else {
var sFile = match[2];
var addrLoad = dbgAddr.addr;
this.macro10 = new Macro10(match[2], addrLoad, sOptions, dbg, function doneMacro10(nErrorCode, sURL) {
this.macro10 = new Macro10(sFile, addrLoad, sOptions, dbg, function doneMacro10(nErrorCode, sURL) {
if (!nErrorCode) {
/*
* NOTE: Most Debugger operations run in the context of doCommand(), which catches any exceptions;
* however, this callback may be running in a different context (eg, a network request callback), so
* better safe than sorry.
*/
try {
dbg.loadBin(dbg.macro10.getBin(), addrLoad);
} catch(e) {
dbg.println(e.message);
}
} else {
dbg.println("error (" + nErrorCode + ") processing " + sURL);
dbg.println("error (" + nErrorCode + ") processing " + (sURL || sFile));
}
dbg.macro10 = null;
});
@ -3318,7 +3335,7 @@ class DebuggerPDP10 extends Debugger {
sCmd = Str.trim(sCmd);
var a = sCmd.match(/^(['"])(.*?)\1$/);
if (!a) {
this.parseExpression(sCmd, true);
this.parseExpression(sCmd, false);
} else {
if (a[2].length > 1) {
this.println(this.replaceRegs(a[2]));

189
modules/pdp10/lib/macro10.js
View file

@ -67,7 +67,7 @@ var Sym;
/**
* @typedef {{
* nLocation:(number),
* aValues:(Array.<string>),
* sValue:(string)
* }}
*/
var Fixup;
@ -301,50 +301,14 @@ class Macro10 {
}
this.aFixups.forEach(function processFixup(fixup){
var value = 0;
var sValue = fixup.aValues[0];
var sOperand = fixup.aValues[1];
var nLocation = fixup.nLocation;
if (fixup.aValues.length == 1) {
if (sValue.indexOf('@') >= 0 || sValue.indexOf('(') >= 0) {
sOperand = sValue;
sValue = "";
}
}
if (sOperand != null) {
value = macro10.dbg.parseInstruction(sValue, sOperand, nLocation);
if (value < 0) {
macro10.error("unable to parse instruction: " + fixup.aValues[0] + ' ' + fixup.aValues[1]);
}
} else {
value = macro10.parseExpression(sValue, nLocation);
var value = macro10.parseExpression(fixup.sValue, undefined, nLocation);
if (value === undefined) {
macro10.error("unable to parse expression: " + sValue);
macro10.error("unable to parse expression: " + fixup.sValue);
return;
}
else if (macro10.aWords[nLocation] === undefined) {
macro10.error("undefined fixup location: " + Str.toOct(nLocation, 0, true));
}
else {
value += macro10.aWords[nLocation];
}
}
/*
* At the end of the day, we only want unsigned 36-bit values, and some of our internal calculations
* already adhere to that (eg, the parseExpression() concatenation of two unsigned 18-bit values).
* But in general, the expression parser is allowed to return negative values, so that signed arithmetic
* works naturally. Perhaps that decision should be revisited, but for now, this particular mix of
* behaviors means that when checking for out-of-range values, the upper bound must be the unsigned
* WORD_LIMIT, while the lower bound must be the signed INT_LIMIT.
*
* In a perfect world, the bounds would either be -INT_LIMIT,INT_LIMIT-1 or 0,WORD_LIMIT-1. In any
* event, the truncate() call will ensure everything is an unsigned 36-bit value. The warning should
* trigger only if the original value contained more than 36 significant bits.
*/
var w = macro10.dbg.truncate(value || 0, 36, true);
if (value < -PDP10.INT_LIMIT || value >= PDP10.WORD_LIMIT) {
macro10.warning("truncated value " + Str.toOct(value) + " at location " + Str.toOct(nLocation) + " to " + Str.toOct(w));
}
macro10.aWords[nLocation] = w;
macro10.aWords[nLocation] = macro10.truncate(value, nLocation);
});
} catch(err) {
@ -406,9 +370,10 @@ class Macro10 {
}
}
this.sOperator = sOperator;
sOperands = sOperands.trim();
if (!sOperator && !sOperands) return true;
/*
* My initial read of the MACRO-10 specification suggested that lines may begin with EITHER
* "symbol:" (for a label) or "symbol=" (for an assignment), but apparently they can have BOTH.
@ -418,6 +383,7 @@ class Macro10 {
sOperands = sOperands.substr(1);
sOperator = '=';
}
this.sOperator = sOperator;
/*
* Check the operands for a literal. If the line contains and/or ends with a literal
@ -440,12 +406,6 @@ class Macro10 {
if (!this.parseMacro(sOperator, sOperands)) {
switch (sOperator) {
case "":
if (sOperands) {
this.genWord(0, [sOperands]);
}
break;
case "=":
this.addAssign(sLabel, sOperands);
break;
@ -471,10 +431,7 @@ class Macro10 {
break;
default:
if (!this.parseOpcode(sOperator, sOperands)) {
this.genWord(0, [sOperator + sOperands]);
// if (DEBUG) this.println(Str.toDec(this.nLine, 5) + ": label(" + sLabel + ") operator(" + sOperator + ") operands(" + sOperands + ") comment(" + sComment + ")");
}
this.addWord(sOperator, sOperands);
break;
}
}
@ -529,24 +486,6 @@ class Macro10 {
return true;
}
/**
* parseOpcode(sOpcode, sOperands)
*
* @this {Macro10}
* @param {string} sOpcode
* @param {string} sOperands
* @return {boolean}
*/
parseOpcode(sOpcode, sOperands)
{
var opCode = this.dbg.parseInstruction(sOpcode);
if (opCode >= 0) {
this.genWord(opCode, [sOpcode, sOperands]);
return true;
}
return false;
}
/**
* isSymbolChar(ch)
*
@ -653,7 +592,7 @@ class Macro10 {
}
/**
* parseExpression(sOperand, nLocation)
* parseExpression(sOperand, fPass1, nLocation)
*
* This is a wrapper around the Debugger's parseExpression() function to take care of some
* additional requirements we have, such as interpreting a period as the current location and
@ -662,15 +601,20 @@ class Macro10 {
*
* @this {Macro10}
* @param {string} sOperand
* @param {number} [nLocation]
* @param {boolean|undefined} [fPass1]
* @param {number|undefined} [nLocation]
* @return {number|undefined}
*/
parseExpression(sOperand, nLocation)
parseExpression(sOperand, fPass1, nLocation)
{
var result;
/*
* Check for the "double comma" syntax that MACRO-10 uses to express a 36-bit value as two 18-bit halves,
* and invoke ourselves recursively for each half.
*/
var match = sOperand.match(/^([^,]*),,([^,]*)$/);
if (!match) {
if (nLocation === undefined) nLocation = this.nLocation;
/*
* Check for the "period" syntax that MACRO-10 uses to represent the value of the current
* location. The Debugger's parseInstruction() method understands that syntax, but its
@ -682,18 +626,19 @@ class Macro10 {
* is (I think) as the decimal point within a floating-point number, so here we only replace
* periods that are not FOLLOWED by a decimal digit.
*/
sOperand = sOperand.replace(/\.([^0-9]|$)/g, this.dbg.toStrBase(nLocation, -1) + "$1");
/*
* Check for the "double comma" syntax that MACRO-10 uses to express a 36-bit value as two 18-bit halves.
*/
var match = sOperand.match(/^([^,]*),,([^,]*)$/);
if (!match) {
result = this.dbg.parseExpression(sOperand);
result = this.dbg.parseExpression(sOperand.replace(/\.([^0-9]|$)/g, this.dbg.toStrBase(nLocation, -1) + "$1"), fPass1);
if (result === undefined) {
this.error("error parsing expression: " + sOperand);
}
// else if (this.dbg.sUndefined != null) {
// /*
// * If a valid result was returned but sUndefined is also set, then this must be a pass1 evaluation.
// */
// }
} else {
var wLeft = match[1]? this.dbg.parseExpression(match[1]) : 0;
var wLeft = match[1]? this.parseExpression(match[1]) : 0;
if (wLeft !== undefined) {
var wRight = match[2]? this.dbg.parseExpression(match[2]) : 0;
var wRight = match[2]? this.parseExpression(match[2]) : 0;
if (wRight !== undefined) {
/*
* NOTE: These must be combined as UNSIGNED values, so that's what we tell truncate().
@ -880,6 +825,9 @@ class Macro10 {
aParms = aDefaults = [];
if (sOperator == Macro10.PSEUDO_OP.DEFINE) {
/*
* This is a DEFINE (macro) block.
*/
match = sOperands.match(/([A-Z$%.][0-9A-Z$%.]*)\s*(\([^)]*\)|)\s*(<|)(.*)/i);
if (!match) {
this.error("unrecognized " + sOperator + " definition: " + sOperands);
@ -902,6 +850,9 @@ class Macro10 {
iMatch = 3;
}
else if (sOperator == Macro10.PSEUDO_OP.LITERAL) {
/*
* This is a LITERAL block.
*/
this.chMacroOpen = '[';
this.chMacroClose = ']';
name = '_' + Str.toDec(this.nLocation, 5);
@ -914,6 +865,9 @@ class Macro10 {
iMatch = 0;
}
else {
/*
* This must be a REPEAT or CONDITIONAL block.
*/
var sOperand = this.getExpression(sOperands);
if (!sOperand) {
this.error("missing " + sOperator + " expression: " + sOperands);
@ -923,6 +877,10 @@ class Macro10 {
sOperand = sOperand.trim();
match = sOperands.match(/\s*(<|)(.*)/i);
name = '_' + sOperator;
/*
* The expression is either a repeat count or a condition. Either way, we must be able to
* resolve it now, so we don't set fPass1 (but that doesn't mean it's the second pass, either).
*/
nOperand = this.parseExpression(sOperand) || 0;
iMatch = 1;
}
@ -1008,6 +966,36 @@ class Macro10 {
this.dbg.setVariable(name, value);
}
/**
* addWord(sOperator, sOperands)
*
* @this {Macro10}
* @param {string} sOperator
* @param {string} sOperands
*/
addWord(sOperator, sOperands)
{
var w;
var sExp = sOperator + sOperands;
if (sExp.indexOf(",,") >= 0 || !sOperator && sExp.indexOf('@') < 0 && sExp.indexOf('(') < 0) {
w = this.parseExpression(sExp, true);
} else {
w = this.dbg.parseInstruction(sOperator, sOperands, this.nLocation, true);
if (w < 0) {
/*
* MACRO-10 also allows instructions to be assembled without an opcode (ie, just an address reference).
*/
w = this.dbg.parseInstruction("", sExp, this.nLocation, true);
if (w < 0) w = undefined;
}
}
if (w !== undefined) {
this.genWord(w, this.dbg.sUndefined);
} else {
this.error("unrecognized expression: " + sExp);
}
}
/**
* addXWD()
*
@ -1019,7 +1007,7 @@ class Macro10 {
*/
addXWD(sOperands)
{
this.genWord(0, [sOperands.replace(",", ",,")]);
this.genWord(0, sOperands.replace(",", ",,"));
}
/**
@ -1068,18 +1056,35 @@ class Macro10 {
}
/**
* genWord(w, aValues)
* genWord(value, sFixup)
*
* @this {Macro10}
* @param {number} w (default value for the current location)
* @param {Array.<string>} [aValues] (optional fixup value(s) to evaluate later)
* @param {number} value (default value for the current location)
* @param {string|null} [sFixup] (optional fixup value to evaluate later)
*/
genWord(w, aValues)
genWord(value, sFixup)
{
this.aWords[this.nLocation] = w;
if (aValues) this.aFixups.push({nLocation: this.nLocation, aValues});
this.aWords[this.nLocation] = this.truncate(value);
if (sFixup != null) this.aFixups.push({nLocation: this.nLocation, sValue: sFixup});
this.nLocation++;
}
/**
* truncate(value, nLocation)
*
* @this {Macro10}
* @param {number} value
* @param {number} [nLocation]
* @return {number}
*/
truncate(value, nLocation = this.nLocation)
{
var w = this.dbg.truncate(value || 0, 36, true);
if (value < -PDP10.INT_LIMIT || value >= PDP10.WORD_LIMIT) {
this.warning("truncated value " + Str.toOct(value) + " at location " + Str.toOct(nLocation) + " to " + Str.toOct(w));
}
return w;
}
}
Macro10.PSEUDO_OP = {

9
modules/pdp11/lib/debugger.js
View file

@ -532,7 +532,7 @@ class DebuggerPDP11 extends Debugger {
}
/**
* parseAddr(sAddr, fCode, fNoChecks, fPrint)
* parseAddr(sAddr, fCode, fNoChecks)
*
* 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,
@ -545,10 +545,9 @@ class DebuggerPDP11 extends Debugger {
* @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}
*/
parseAddr(sAddr, fCode, fNoChecks, fPrint)
parseAddr(sAddr, fCode, fNoChecks)
{
var dbgAddr;
var dbgAddrNext = (fCode? this.dbgAddrNextCode : this.dbgAddrNextData);
@ -570,7 +569,7 @@ class DebuggerPDP11 extends Debugger {
} else if (sAddr.indexOf('.') >= 0) {
nBase = 10;
}
addr = this.parseExpression(sAddr, fPrint);
addr = this.parseExpression(sAddr);
}
if (addr != null) {
dbgAddr = this.newAddr(addr, fPhysical, nBase);
@ -3483,7 +3482,7 @@ class DebuggerPDP11 extends Debugger {
sCmd = Str.trim(sCmd);
var a = sCmd.match(/^(['"])(.*?)\1$/);
if (!a) {
this.parseExpression(sCmd, true);
this.parseExpression(sCmd, false);
} else {
if (a[2].length > 1) {
this.println(this.replaceRegs(a[2]));

98
modules/shared/lib/debugger.js
View file

@ -77,7 +77,8 @@ var DbgAddr;
*
* @unrestricted
*/
class Debugger extends Component {
class Debugger extends Component
{
/**
* Debugger(parmsDbg)
*
@ -91,7 +92,8 @@ class Debugger extends Component {
*
* @param {Object} parmsDbg
*/
constructor(parmsDbg) {
constructor(parmsDbg)
{
if (DEBUGGER) {
super("Debugger", parmsDbg);
@ -107,6 +109,19 @@ class Debugger extends Component {
*/
this.nBits = 32;
/*
* sUndefined is set to the last unknown variable that parseExpression() encounters, if if
* is called in "quiet mode"; the value used for the variable is zero. This mode was added
* for components that need to support expressions containing "fixups" (ie, values that
* must be determined later).
*
* TODO: Only one unknown (fixup) per expression is supported, and we don't indicate what
* operation was performed with the value (callers generally assume addition). If a call
* encounters more than one undefined value, it will revert to normal error reporting and
* return an undefined value for the entire expression.
*/
this.sUndefined = null;
this.achGroup = ['{','}'];
this.achAddress = ['[',']'];
@ -163,7 +178,8 @@ class Debugger extends Component {
* @param {number} [off] optional offset into sReg
* @return {number} register index, or -1 if not found
*/
getRegIndex(sReg, off) {
getRegIndex(sReg, off)
{
return -1;
}
@ -176,7 +192,8 @@ class Debugger extends Component {
* @param {number} iReg
* @return {number|undefined}
*/
getRegValue(iReg) {
getRegValue(iReg)
{
return undefined;
}
@ -192,7 +209,8 @@ class Debugger extends Component {
* @param {string} sAddr
* @return {string}
*/
parseAddrReference(s, sAddr) {
parseAddrReference(s, sAddr)
{
return s.replace('[' + sAddr + ']', "unimplemented");
}
@ -202,7 +220,8 @@ class Debugger extends Component {
* @this {Debugger}
* @return {string}
*/
getNextCommand() {
getNextCommand()
{
var sCmd;
if (this.iPrevCmd > 0) {
sCmd = this.aPrevCmds[--this.iPrevCmd];
@ -219,7 +238,8 @@ class Debugger extends Component {
* @this {Debugger}
* @return {string|null}
*/
getPrevCommand() {
getPrevCommand()
{
var sCmd = null;
if (this.iPrevCmd < this.aPrevCmds.length - 1) {
sCmd = this.aPrevCmds[++this.iPrevCmd];
@ -236,7 +256,8 @@ class Debugger extends Component {
* @param {string} [chSep] is the command separator character (default is ';')
* @return {Array.<string>}
*/
parseCommand(sCmd, fSave, chSep) {
parseCommand(sCmd, fSave, chSep)
{
if (fSave) {
if (!sCmd) {
if (this.fAssemble) {
@ -434,7 +455,8 @@ class Debugger extends Component {
* @param {number} [cOps] (default is -1 for all)
* @return {boolean} true if successful, false if error
*/
evalOps(aVals, aOps, cOps = -1) {
evalOps(aVals, aOps, cOps = -1)
{
while (cOps-- && aOps.length) {
var chOp = aOps.pop();
if (aVals.length < 2) return false;
@ -511,7 +533,7 @@ class Debugger extends Component {
}
/**
* parseExpression(sExp, fPrint)
* parseExpression(sExp, fQuiet)
*
* A quick-and-dirty expression parser. It takes an expression like:
*
@ -543,15 +565,17 @@ class Debugger extends Component {
*
* @this {Debugger}
* @param {string|undefined} sExp
* @param {boolean} [fPrint] is true to print all resolved values, false for quiet parsing
* @param {boolean} [fQuiet] (true for quiet parsing)
* @return {number|undefined} numeric value, or undefined if sExp contains any undefined or invalid values
*/
parseExpression(sExp, fPrint) {
parseExpression(sExp, fQuiet)
{
var value;
/*
* First process (and eliminate) any references, aka sub-expressions.
*/
this.sUndefined = null;
if (sExp) sExp = this.parseReference(sExp);
if (sExp) {
@ -584,17 +608,22 @@ class Debugger extends Component {
while (i < asValues.length) {
var sValue = asValues[i++];
var cchValue = sValue.length;
var s = Str.trim(sValue);
if (!s) {
sValue = Str.trim(sValue);
if (!sValue) {
fError = true;
break;
}
var v = this.parseValue(s, null, fPrint === false);
var v = this.parseValue(sValue, null, fQuiet);
if (v === undefined) {
if (this.sUndefined == null && fQuiet) {
this.sUndefined = sValue;
v = 0;
} else {
fError = true;
fPrint = false;
fQuiet = !fQuiet;
break;
}
}
aVals.push(this.truncate(v, this.nBits));
if (i == asValues.length) break;
var sOp = asValues[i++], cchOp = sOp.length;
@ -610,9 +639,9 @@ class Debugger extends Component {
}
if (!fError) {
value = aVals.pop();
if (fPrint) this.printValue(null, value);
if (fQuiet === false) this.printValue(null, value);
} else {
if (fPrint) this.println("error parsing '" + sExpOrig + "' at character " + (sExpOrig.length - sExp.length));
if (fQuiet === false) this.println("error parsing '" + sExpOrig + "' at character " + (sExpOrig.length - sExp.length));
}
}
return value;
@ -629,7 +658,8 @@ class Debugger extends Component {
* @param {string} s
* @return {string|undefined}
*/
parseReference(s) {
parseReference(s)
{
var a;
var chOpen = this.achGroup[0];
var chClose = this.achGroup[1];
@ -677,7 +707,8 @@ class Debugger extends Component {
* @param {string} s
* @return {string}
*/
parseSysVars(s) {
parseSysVars(s)
{
var a;
while (a = s.match(/\$([a-z]+)/i)) {
var v = null;
@ -701,7 +732,8 @@ class Debugger extends Component {
* @param {boolean} [fQuiet]
* @return {number|undefined} numeric value, or undefined if sValue is either undefined or invalid
*/
parseValue(sValue, sName, fQuiet) {
parseValue(sValue, sName, fQuiet)
{
var value;
if (sValue != null) {
var iReg = this.getRegIndex(sValue);
@ -732,7 +764,8 @@ class Debugger extends Component {
* @param {number|undefined} value
* @return {boolean} true if value defined, false if not
*/
printValue(sVar, value) {
printValue(sVar, value)
{
var sValue;
var fDefined = false;
if (value !== undefined) {
@ -753,7 +786,8 @@ class Debugger extends Component {
* @this {Debugger}
* @return {Object}
*/
resetVariables() {
resetVariables()
{
var a = this.aVariables;
this.aVariables = {};
return a;
@ -765,7 +799,8 @@ class Debugger extends Component {
* @this {Debugger}
* @param {Object} a (from previous resetVariables() call)
*/
restoreVariables(a) {
restoreVariables(a)
{
this.aVariables = a;
}
@ -776,7 +811,8 @@ class Debugger extends Component {
* @param {string} [sVar]
* @return {boolean} true if all value(s) defined, false if not
*/
printVariable(sVar) {
printVariable(sVar)
{
if (sVar) {
return this.printValue(sVar, this.aVariables[sVar]);
}
@ -794,7 +830,8 @@ class Debugger extends Component {
* @this {Debugger}
* @param {string} sVar
*/
delVariable(sVar) {
delVariable(sVar)
{
delete this.aVariables[sVar];
}
@ -805,7 +842,8 @@ class Debugger extends Component {
* @param {string} sVar
* @return {number|undefined}
*/
getVariable(sVar) {
getVariable(sVar)
{
return this.aVariables[sVar];
}
@ -816,7 +854,8 @@ class Debugger extends Component {
* @param {string} sVar
* @param {number} value
*/
setVariable(sVar, value) {
setVariable(sVar, value)
{
this.aVariables[sVar] = value;
}
@ -830,7 +869,8 @@ class Debugger extends Component {
* @param {number} [nBits] (-1 to strip leading zeros, 0 to allow a variable number of digits)
* @return {string}
*/
toStrBase(n, nBits = 0) {
toStrBase(n, nBits = 0)
{
var s;
switch(this.nBase) {
case 8:

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