71 lines
2.7 KiB
JavaScript
71 lines
2.7 KiB
JavaScript
const { utils: { book_new, json_to_sheet }, writeFileXLSX } = require("xlsx");
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/* start decompiler */
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const DecompInterface = JavaHelper.getClass('ghidra.app.decompiler.DecompInterface');
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const decompiler = new DecompInterface();
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decompiler.openProgram(currentProgram);
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/* get decompiled C source */
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const src = (() => {
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const fname = '_TSTCellToCellStorage';
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/* find address to function */
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const fsymbs = currentProgram.getSymbolTable().getGlobalSymbols(fname);
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if(!fsymbs) throw new Error(`Global Symbol ${fname} cannot be found`);
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/* find function */
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const fn = currentProgram.getFunctionManager().getFunctionAt(fsymbs[0].getAddress());
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if(!fn) throw new Error(`Function ${fname} cannot be found`);
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/* decompile function */
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const decomp = decompiler.decompileFunction(fn, 10000, null);
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if (decomp.isTimedOut() || !decomp.decompileCompleted()) throw new Error(`Function ${fname} at ${fn} could not be decompiled`);
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/* get and return generated C code */
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const src = decomp.getDecompiledFunction().getC();
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if(!src) throw new Error(`Function ${fname} at ${fn} decompilation`);
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return src;
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})();
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/* offset[n] will be the name of the field at bit `n` (mask `1 << n`) */
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let offset = [];
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/* combine split lines and lazily extract data from C source */
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let n = -1;
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src.split(/[\r\n]+/).reduce((acc,row,i) => {
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if(i <= 9) acc.rows.push(row);
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else if(row.match(/[{};]$/)) {
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if(acc.buf) { row = acc.buf + row.trim(); acc.buf = ""; }
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acc.rows.push(row);
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} else acc.buf += acc.buf ? row.trim() : row.replace(/[\r\n]+$/,"");
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return acc;
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}, {rows:[], buf:""}).rows.forEach(line => {
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if(line.match(/^ if.*(char|short| >> | & )/)) {
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n = -1;
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if(!line.match(/Var/)) return;
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if(line.match(/char/)) n = 7;
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else if(line.match(/short/)) n = 15;
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else if(line.match(/>>/)) n = parseInt(line.match(/>> ([1-9]\d*|0x[0-9a-f]+)/)[1]);
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else if(line.match(/&/)) n = Math.round(Math.log2(parseInt(line.match(/& ([1-9]\d*|0x[0-9a-f]+)/)[1])));
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} else if(line.match(/PTR__objc_msgSend/) && n >= 0) {
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if(line.match(/AssertionHandler|NSString|stringWithUTF8String|Failure/)) return;
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if(!line.match(/,/)) return; // suppress noop
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const ptr = line.match(/PTR_s_\w+/)[0];
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offset[+n] = ptr;
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n = -1;
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}
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});
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/* construct objects with "Mask" (hex string) and "Internal Name" */
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const aoo = offset.map((name, idx) => ({
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Mask: "0x" + (1 << idx).toString(16),
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"Internal Name": name.replace(/^PTR_s_|_[0-9a-f]*$/g,"").replace(/[A-Z]/g, " $&").toLowerCase().replace(/ i d/, " ID")
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})).filter(x => x);
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/* create worksheet */
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const ws = json_to_sheet(aoo);
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/* write workbook */
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const wb = book_new(ws, "Offsets");
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/* write to XLSX */
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writeFileXLSX(wb, "SheetJSGhidraTSTCell.xlsx");
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