Remove libc dependency for the generated code
This commit is contained in:
335
tools/cross.js
Normal file
335
tools/cross.js
Normal file
@ -0,0 +1,335 @@
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import fs from 'fs/promises'
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import path from 'node:path'
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import childProcess from 'node:child_process'
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import process from 'process'
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import os from 'os'
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import { Buffer } from 'node:buffer'
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// Define constants.
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const tmp = path.resolve('./build/tools')
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const baseDirectory = path.resolve('./tools')
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const kernelVersion = '5.15.159'
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const gccVersion = '14.1.0'
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const binutilsVersion = '2.42'
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const glibcVersion = '2.39'
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async function gccVerbose (gccBinary) {
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const env = {
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...process.env,
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LANG: 'C'
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}
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const gccV = childProcess.spawn(gccBinary, ['--verbose'], { stdio: ['ignore', 'ignore', 'pipe'], env })
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const buffers = []
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gccV.stderr.on('data', function (data) {
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buffers.push(data)
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})
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return new Promise(function (resolve, reject) {
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gccV.on('exit', function () {
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resolve(Buffer.concat(buffers).toString())
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})
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})
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}
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async function findBuildTarget (gccVersion) {
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let gccBinary = 'gcc'
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let output = await gccVerbose(gccBinary)
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if (output.startsWith('Apple clang')) {
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gccBinary = `gcc-${gccVersion.split('.')[0]}`
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output = await gccVerbose(gccBinary)
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}
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return output
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.split('\n')
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.reduce(function (accumulator, line) {
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if (line.startsWith('Target: ')) {
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return {
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...accumulator,
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build: line.split(' ')[1]
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}
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} else if (line.startsWith('COLLECT_GCC')) {
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return {
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...accumulator,
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gcc: line.split('=')[1]
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}
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} else {
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return accumulator
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}
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}, {})
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}
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async function downloadAndUnarchive (url) {
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const response = await fetch(url)
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const bodyReader = response.body.getReader()
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const basename = path.basename(url.pathname)
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let archiveType = ''
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let rootDirectory = ''
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switch (path.extname(basename)) {
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case '.bz2':
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archiveType = '-j'
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rootDirectory = path.basename(basename, '.tar.bz2')
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break
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case '.xz':
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archiveType = '-J'
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rootDirectory = path.basename(basename, '.tar.xz')
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break
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default:
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break
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}
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return new Promise(async function (resolve, reject) {
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const untar = childProcess.spawn('tar', ['-C', tmp, archiveType, '-xv'], { stdio: ['pipe', 'inherit', 'inherit'] })
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let done = false
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untar.on('exit', function () {
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resolve(path.join(tmp, rootDirectory))
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})
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do {
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const chunk = await bodyReader.read()
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done = chunk.done
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if (chunk.value !== undefined) {
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untar.stdin.write(chunk.value)
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}
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} while (!done)
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untar.stdin.end()
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})
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}
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async function copyGlibcHeaders () {
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const sourceDirectory = await downloadAndUnarchive(
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new URL(`https://ftp.gnu.org/gnu/glibc/glibc-${glibcVersion}.tar.xz`)
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)
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const includeDirectory = path.join(tmp, 'include')
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await fs.mkdir(includeDirectory)
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await fs.cp(path.join(sourceDirectory, 'elf/elf.h'), path.join(includeDirectory, 'elf.h'))
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return sourceDirectory
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}
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async function buildKernel (rootfs, options) {
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const cwd = await downloadAndUnarchive(
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new URL(`https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-${kernelVersion}.tar.xz`)
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)
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const env = {
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...process.env,
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CROSS_COMPILE: `${options.target}-`,
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ARCH: 'riscv',
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PATH: `${path.join(rootfs, 'bin')}:${process.env['PATH']}`,
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HOSTCFLAGS: `-D_UUID_T -D__GETHOSTUUID_H -I${path.join(tmp, 'include')}`
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}
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childProcess.execFileSync('make', ['rv32_defconfig'], { stdio: 'inherit', env, cwd })
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childProcess.execFileSync('make', ['-j', os.availableParallelism()], { stdio: 'inherit', env, cwd })
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childProcess.execFileSync('make', ['headers'], { stdio: 'inherit', env, cwd })
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const userDirectory = path.join(options.sysroot, 'usr')
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await fs.cp(path.join(cwd, 'usr/include'), path.join(userDirectory, 'include'), { recursive: true })
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return path.join(cwd, 'arch/riscv/boot/Image')
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}
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async function buildInit (rootfs, options) {
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const env = {
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...process.env,
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PATH: `${path.join(rootfs, 'bin')}:${process.env['PATH']}`
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}
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const compilerArguments = [
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'-ffreestanding', '-static',
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'-o', path.join(tmp, 'init'),
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path.join(baseDirectory, 'init.c')
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]
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childProcess.execFileSync('riscv32-unknown-linux-gnu-gcc', compilerArguments, { stdio: 'inherit', env })
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}
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async function buildGlibc (sourceDirectory, rootfs, options) {
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const configureOptions = [
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'--prefix=/usr',
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`--host=${options.target}`,
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`--target=${options.target}`,
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`--build=${options.build}`,
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`--enable-kernel=${kernelVersion}`,
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`--with-headers=${path.join(options.sysroot, 'usr/include')}`,
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'--disable-nscd',
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'--disable-libquadmath',
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'--disable-libitm',
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'--disable-werror',
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'libc_cv_forced_unwind=yes'
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]
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const bin = path.join(rootfs, 'bin')
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const env = {
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...process.env,
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PATH: `${path.join(rootfs, 'bin')}:${process.env['PATH']}`
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}
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const cwd = path.join(path.dirname(sourceDirectory), 'build-glibc');
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await fs.mkdir(cwd)
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childProcess.execFileSync(path.join(path.relative(cwd, sourceDirectory), './configure'), configureOptions, {
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stdio: 'inherit',
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env,
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cwd
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})
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childProcess.execFileSync('make', ['-j', os.availableParallelism()], { stdio: 'inherit', env, cwd })
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childProcess.execFileSync('make', [`install_root=${options.sysroot}`, 'install'], { stdio: 'inherit', env, cwd })
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}
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async function buildCrossBinutils (rootfs, options) {
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const sourceDirectory = await downloadAndUnarchive(
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new URL(`https://ftp.gnu.org/gnu/binutils/binutils-${binutilsVersion}.tar.xz`)
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)
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const cwd = path.join(path.dirname(sourceDirectory), 'build-binutils');
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await fs.mkdir(cwd)
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const env = {
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...process.env,
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CC: options.gcc,
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CXX: options.gxx
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}
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const configureOptions = [
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`--prefix=${rootfs}`,
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`--target=${options.target}`,
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'--disable-nls',
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'--enable-gprofng=no',
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'--disable-werror',
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'--enable-default-hash-style=gnu',
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'--disable-libquadmath'
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]
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childProcess.execFileSync(path.join(path.relative(cwd, sourceDirectory), 'configure'), configureOptions, {
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stdio: 'inherit',
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cwd,
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env
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})
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childProcess.execFileSync('make', ['-j', os.availableParallelism()], { stdio: 'inherit', cwd, env })
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childProcess.execFileSync('make', ['install'], { stdio: 'inherit', cwd, env })
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return sourceDirectory
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}
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async function buildGCC1 (rootfs, options) {
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const sourceDirectory = await downloadAndUnarchive(
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new URL(`https://gcc.gnu.org/pub/gcc/releases/gcc-${gccVersion}/gcc-${gccVersion}.tar.xz`)
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)
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const cwd = path.join(path.dirname(sourceDirectory), 'build-gcc');
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await fs.mkdir(cwd)
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childProcess.execFileSync(path.join(sourceDirectory, 'contrib/download_prerequisites'), {
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stdio: 'inherit',
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cwd: sourceDirectory
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})
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const configureOptions = [
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`--prefix=${rootfs}`,
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`--with-sysroot=${options.sysroot}`,
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'--enable-languages=c,c++',
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'--disable-shared',
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'--with-arch=rv32imafdc',
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'--with-abi=ilp32d',
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'--with-tune=rocket',
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'--with-isa-spec=20191213',
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'--disable-bootstrap',
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'--disable-multilib',
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'--disable-libmudflap',
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'--disable-libssp',
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'--disable-libquadmath',
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'--disable-libsanitizer',
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'--disable-threads',
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'--disable-libatomic',
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'--disable-libgomp',
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'--disable-libvtv',
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'--disable-libstdcxx',
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'--disable-nls',
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'--with-newlib',
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'--without-headers',
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`--target=${options.target}`,
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`--build=${options.build}`,
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`--host=${options.build}`
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]
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const flags = '-O2 -fPIC'
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const env = {
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...process.env,
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CC: options.gcc,
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CXX: options.gxx,
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CFLAGS: flags,
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CXXFLAGS: flags,
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PATH: `${path.join(rootfs, 'bin')}:${process.env['PATH']}`
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}
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childProcess.execFileSync(path.join(path.relative(cwd, sourceDirectory), 'configure'), configureOptions, {
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stdio: 'inherit',
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env,
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cwd
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})
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childProcess.execFileSync('make', ['-j', os.availableParallelism()], { stdio: 'inherit', env, cwd })
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childProcess.execFileSync('make', ['install'], { stdio: 'inherit', env, cwd })
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return sourceDirectory
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}
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async function buildGCC2 (sourceDirectory, rootfs, options) {
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const cwd = path.join(path.dirname(sourceDirectory), 'build-gcc');
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await fs.rm(cwd, { recursive: true, force: true })
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await fs.mkdir(cwd)
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const configureOptions = [
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`--prefix=${rootfs}`,
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`--with-sysroot=${options.sysroot}`,
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'--enable-languages=c,c++,lto',
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'--enable-lto',
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'--enable-shared',
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'--with-arch=rv32imafdc',
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'--with-abi=ilp32d',
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'--with-tune=rocket',
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'--with-isa-spec=20191213',
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'--disable-bootstrap',
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'--disable-multilib',
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'--enable-checking=release',
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'--disable-libssp',
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'--disable-libquadmath',
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'--enable-threads=posix',
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'--with-default-libstdcxx-abi=new',
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'--disable-nls',
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`--target=${options.target}`,
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`--build=${options.build}`,
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`--host=${options.build}`
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]
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const flags = '-O2 -fPIC'
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const env = {
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...process.env,
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CFLAGS: flags,
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CXXFLAGS: flags,
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PATH: `${path.join(rootfs, 'bin')}:${process.env['PATH']}`
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}
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childProcess.execFileSync(path.join(path.relative(cwd, sourceDirectory), 'configure'), configureOptions, {
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stdio: 'inherit',
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env,
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cwd
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})
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childProcess.execFileSync('make', ['-j', os.availableParallelism()], { stdio: 'inherit', env, cwd })
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childProcess.execFileSync('make', ['install'], { stdio: 'inherit', env, cwd })
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}
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const rootfs = path.join(tmp, 'rootfs')
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const options = await findBuildTarget(gccVersion)
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options.gxx = options.gcc.replaceAll('c', '+')
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options.sysroot = path.join(tmp, 'sysroot')
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options.target = 'riscv32-unknown-linux-gnu'
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for (const targetDirectory of [tmp, rootfs]) {
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await fs.rm(targetDirectory, { recursive: true, force: true })
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await fs.mkdir(targetDirectory)
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}
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const binutilsSource = await buildCrossBinutils(rootfs, options)
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const gccSource = await buildGCC1(rootfs, options)
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const glibcSource = await copyGlibcHeaders()
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const kernelImage = await buildKernel(rootfs, options)
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await buildGlibc(glibcSource, rootfs, options)
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await buildGCC2(gccSource, rootfs, options)
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buildInit (rootfs, options)
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console.log(kernelImage)
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