118 lines
3.2 KiB
JavaScript
118 lines
3.2 KiB
JavaScript
// set up require.js for worker
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importScripts("../../dasm.js");
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// shim out window and document objects
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// https://github.com/mbostock/d3/issues/1053
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var noop = function() { return new Function(); };
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var window = noop();
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window.CSSStyleDeclaration = noop();
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window.CSSStyleDeclaration.setProperty = noop();
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window.Element = noop();
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window.Element.setAttribute = noop();
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window.Element.setAttributeNS = noop();
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window.navigator = noop();
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var document = noop();
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document.documentElement = noop();
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document.documentElement.style = noop();
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MAIN_FILENAME = "main.a";
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PREAMBLE = "\tprocessor 6502\n";
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PREAMBLE_LINES = 1;
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function parseListing(code, unresolved) {
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var errorMatch = /main.a [(](\d+)[)]: error: (.+)/;
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// 4 08ee a9 00 start lda #01workermain.js:23:5
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var lineMatch = /\s*(\d+)\s+(\S+)\s+([0-9a-f]+)\s+([0-9a-f][0-9a-f ]+)\s+(.+)/;
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var equMatch = /\bequ\b/;
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var errors = [];
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var lines = [];
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var lastline = 0;
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for (var line of code.split(/\r?\n/)) {
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var linem = lineMatch.exec(line);
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if (linem && linem[1]) {
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var linenum = parseInt(linem[1]) - PREAMBLE_LINES;
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var filename = linem[2];
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var offset = parseInt(linem[3], 16);
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var insns = linem[4];
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var restline = linem[5];
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// inside of main file?
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if (filename == MAIN_FILENAME) {
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if (insns && !restline.match(equMatch)) {
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lines.push({
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line:linenum,
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offset:offset,
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insns:insns,
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iscode:restline[0] != '.'
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});
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}
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lastline = linenum;
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} else {
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// inside of macro or include file
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if (linenum == -PREAMBLE_LINES) { // start of macro?
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lines.push({
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line:lastline+1,
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offset:offset,
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insns:null
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});
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}
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}
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// TODO: check filename too
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// TODO: better symbol test (word boundaries)
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for (key in unresolved) {
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var pos = restline ? restline.indexOf(key) : line.indexOf(key);
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if (pos >= 0) {
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errors.push({
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line:linenum,
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msg:"Unresolved symbol '" + key + "'"
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});
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}
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}
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}
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var errm = errorMatch.exec(line);
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if (errm) {
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errors.push({
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line:parseInt(errm[1]),
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msg:errm[2]
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})
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}
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}
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return {lines:lines, errors:errors};
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}
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function assemble(code) {
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var re_usl = /(\w+)\s+0000\s+[?][?][?][?]/;
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var unresolved = {};
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function print_fn(s) {
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var matches = re_usl.exec(s);
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if (matches) {
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unresolved[matches[1]] = 0;
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}
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}
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var Module = DASM({
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noInitialRun:true,
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print:print_fn
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});
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var FS = Module['FS'];
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FS.writeFile(MAIN_FILENAME, PREAMBLE + code);
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Module.callMain([MAIN_FILENAME, "-v3", "-la.lst"]);
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var aout = FS.readFile("a.out");
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//console.log(aout);
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var alst = FS.readFile("a.lst", {'encoding':'utf8'});
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//console.log(alst);
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var listing = parseListing(alst, unresolved);
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return {exitstatus:Module.EXITSTATUS, output:aout, listing:listing};
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}
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//assemblepgm("\tprocessor 6502\n\torg $800\n\tlda #0");
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onmessage = function(e) {
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var code = e.data.code;
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var result = assemble(code);
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//console.log("RESULT", result);
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postMessage(result);
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}
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