elflib/dist/rplsections.js

ELF file reader and writer

import { decode } from './encoding.js';
import { HelperDataView } from './reader.js';
import * as ELF from './types/index.js';
export var RPL;
(function (RPL) {
    function readFileInfoSection(section, endian) {
        if (section.size < 0x60)
            throw new Error('RPL_FILEINFO section is too small, must be at least 0x60 in size.');
        const view = HelperDataView(new DataView(section.data.buffer), endian === ELF.Endian.Big);
        const fileinfo = new ELF.RPLFileInfo();
        let ix = 0;
        const magic = view.readUInt16(ix).toString(16).toUpperCase();
        if (magic !== 'CAFE')
            throw new Error(`RPL_FILEINFO section magic number is invalid! Expected "CAFE", got "${magic}"`);
        /*fileinfo.magic             = magic;*/ ix += 2;
        fileinfo.version = view.readUInt16(ix);
        ix += 2;
        fileinfo.textSize = view.readUInt32(ix);
        ix += 4;
        fileinfo.textAlign = view.readUInt32(ix);
        ix += 4;
        fileinfo.dataSize = view.readUInt32(ix);
        ix += 4;
        fileinfo.dataAlign = view.readUInt32(ix);
        ix += 4;
        fileinfo.loadSize = view.readUInt32(ix);
        ix += 4;
        fileinfo.loadAlign = view.readUInt32(ix);
        ix += 4;
        fileinfo.tempSize = view.readUInt32(ix);
        ix += 4;
        fileinfo.trampAdjust = view.readUInt32(ix);
        ix += 4;
        fileinfo.sdaBase = view.readUInt32(ix);
        ix += 4;
        fileinfo.sda2Base = view.readUInt32(ix);
        ix += 4;
        fileinfo.stackSize = view.readUInt32(ix);
        ix += 4;
        fileinfo.stringsOffset = view.readUInt32(ix);
        ix += 4;
        fileinfo.flags = view.readUInt32(ix);
        ix += 4;
        fileinfo.heapSize = view.readUInt32(ix);
        ix += 4;
        fileinfo.tagOffset = view.readUInt32(ix);
        ix += 4;
        fileinfo.minVersion = view.readUInt32(ix);
        ix += 4;
        fileinfo.compressionLevel = view.readSInt32(ix);
        ix += 4;
        fileinfo.trampAddition = view.readUInt32(ix);
        ix += 4;
        fileinfo.fileInfoPad = view.readUInt32(ix);
        ix += 4;
        fileinfo.cafeSdkVersion = view.readUInt32(ix);
        ix += 4;
        fileinfo.cafeSdkRevision = view.readUInt32(ix);
        ix += 4;
        fileinfo.tlsModuleIndex = view.readUInt16(ix);
        ix += 2;
        fileinfo.tlsAlignShift = view.readUInt16(ix);
        ix += 2;
        fileinfo.runtimeFileInfoSize = view.readUInt32(ix);
        ix += 4;
        fileinfo.strings = [];
        // Section does not have strings
        if (section.size === 0x60 || section.size <= fileinfo.stringsOffset)
            return fileinfo;
        const stringData = section.data.slice(fileinfo.stringsOffset);
        const strings = {};
        let strIx = 0;
        for (let i = 0; i < section.size - fileinfo.stringsOffset; i++) {
            if (stringData[i] === 0) {
                const slen = i - strIx;
                if (slen > 0)
                    strings[fileinfo.stringsOffset + strIx] = decode(stringData, strIx, slen);
                if (slen === 0)
                    strings[fileinfo.stringsOffset + strIx] = '';
                strIx = i + 1;
            }
        }
        fileinfo.strings = strings;
        return fileinfo;
    }
    RPL.readFileInfoSection = readFileInfoSection;
    function isFileInfoSection(section) {
        return section.type === ELF.SectionType.RPLFileInfo;
    }
    RPL.isFileInfoSection = isFileInfoSection;
    async function packCrcSection(section, elf) {
        let crcs = Buffer.alloc(elf.sections.length * section.entSize);
        for (let i = 0; i < elf.sections.length; i++)
            crcs.writeUInt32BE(await elf.sections[i].crc32Hash, i * section.entSize);
        return crcs;
    }
    RPL.packCrcSection = packCrcSection;
    function packFileInfoSection(section) {
        const fileinfo = Buffer.alloc(section.size);
        let ix = 0;
        fileinfo.writeUInt16BE(section.fileinfo.magic, ix);
        ix += 2;
        fileinfo.writeUInt16BE(section.fileinfo.version, ix);
        ix += 2;
        fileinfo.writeUInt32BE(section.fileinfo.textSize, ix);
        ix += 4;
        fileinfo.writeUInt32BE(section.fileinfo.textAlign, ix);
        ix += 4;
        fileinfo.writeUInt32BE(section.fileinfo.dataSize, ix);
        ix += 4;
        fileinfo.writeUInt32BE(section.fileinfo.dataAlign, ix);
        ix += 4;
        fileinfo.writeUInt32BE(section.fileinfo.loadSize, ix);
        ix += 4;
        fileinfo.writeUInt32BE(section.fileinfo.loadAlign, ix);
        ix += 4;
        fileinfo.writeUInt32BE(section.fileinfo.tempSize, ix);
        ix += 4;
        fileinfo.writeUInt32BE(section.fileinfo.trampAdjust, ix);
        ix += 4;
        fileinfo.writeUInt32BE(section.fileinfo.sdaBase, ix);
        ix += 4;
        fileinfo.writeUInt32BE(section.fileinfo.sda2Base, ix);
        ix += 4;
        fileinfo.writeUInt32BE(section.fileinfo.stackSize, ix);
        ix += 4;
        fileinfo.writeUInt32BE(section.fileinfo.stringsOffset, ix);
        ix += 4;
        fileinfo.writeUInt32BE(section.fileinfo.flags, ix);
        ix += 4;
        fileinfo.writeUInt32BE(section.fileinfo.heapSize, ix);
        ix += 4;
        fileinfo.writeUInt32BE(section.fileinfo.tagOffset, ix);
        ix += 4;
        fileinfo.writeUInt32BE(section.fileinfo.minVersion, ix);
        ix += 4;
        fileinfo.writeInt32BE(section.fileinfo.compressionLevel, ix);
        ix += 4;
        fileinfo.writeUInt32BE(section.fileinfo.trampAddition, ix);
        ix += 4;
        fileinfo.writeUInt32BE(section.fileinfo.fileInfoPad, ix);
        ix += 4;
        fileinfo.writeUInt32BE(section.fileinfo.cafeSdkVersion, ix);
        ix += 4;
        fileinfo.writeUInt32BE(section.fileinfo.cafeSdkRevision, ix);
        ix += 4;
        fileinfo.writeUInt16BE(section.fileinfo.tlsModuleIndex, ix);
        ix += 2;
        fileinfo.writeUInt16BE(section.fileinfo.tlsAlignShift, ix);
        ix += 2;
        fileinfo.writeUInt32BE(section.fileinfo.runtimeFileInfoSize, ix);
        ix += 4;
        for (let key in section.fileinfo.strings) {
            const str = section.fileinfo.strings[key];
            if (fileinfo[ix] !== 0)
                throw new Error(`Failed to pack ELF because of corrupt string section of index ${section.index}:\n` +
                    `\tString '${str}' at .strtab offset 0x${Number(key).toString(16).toUpperCase()} is overlapped by the previous string which is too long.`);
            ix += fileinfo.write(str + '\0', ix);
        }
        return fileinfo;
    }
    RPL.packFileInfoSection = packFileInfoSection;
})(RPL || (RPL = {}));