Split the kernel compilation into object files
This commit is contained in:
1
.gitignore
vendored
Normal file
1
.gitignore
vendored
Normal file
@ -0,0 +1 @@
|
||||
/build/
|
||||
347
Rakefile
Executable file
347
Rakefile
Executable file
@ -0,0 +1,347 @@
|
||||
#!/usr/bin/env ruby
|
||||
# This Source Code Form is subject to the terms of the Mozilla Public License,
|
||||
# v. 2.0. If a copy of the MPL was not distributed with this file, You can
|
||||
# obtain one at https://mozilla.org/MPL/2.0/. -}
|
||||
|
||||
# frozen_string_literal: true
|
||||
|
||||
require 'uri'
|
||||
require 'net/http'
|
||||
require 'open3'
|
||||
require 'etc'
|
||||
require 'fileutils'
|
||||
require 'pathname'
|
||||
require 'rake/clean'
|
||||
|
||||
TMP = Pathname.new('./build')
|
||||
|
||||
CLOBBER.include 'build'
|
||||
|
||||
def gcc_verbose(gcc_binary)
|
||||
read, write = IO.pipe
|
||||
system({'LANG' => 'C'}, gcc_binary, '--verbose', err: write)
|
||||
write.close
|
||||
output = read.read
|
||||
read.close
|
||||
output
|
||||
end
|
||||
|
||||
class BuildTarget
|
||||
def initialize(architecture)
|
||||
case architecture
|
||||
when /^r(isc)?v32$/
|
||||
@architecture = :rv32
|
||||
else
|
||||
raise "Unsupported architecture '#{architecture}'."
|
||||
end
|
||||
end
|
||||
|
||||
def sysroot
|
||||
TMP + 'sysroot'
|
||||
end
|
||||
|
||||
def rootfs
|
||||
TMP + 'rootfs'
|
||||
end
|
||||
|
||||
def target
|
||||
case @architecture
|
||||
when :rv32
|
||||
'riscv32-unknown-linux-gnu'
|
||||
end
|
||||
end
|
||||
|
||||
def build
|
||||
@build ||= gcc_verbose(ENV['CC']).lines
|
||||
.find { |line| line.start_with? 'Target: ' }
|
||||
.split(' ').last.strip
|
||||
end
|
||||
|
||||
def configuration
|
||||
case @architecture
|
||||
when :rv32
|
||||
['--with-arch=rv32imafdc', '--with-abi=ilp32d', '--with-tune=rocket', '--with-isa-spec=20191213']
|
||||
else
|
||||
[]
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
def download_and_unarchive(url)
|
||||
case File.extname url.path
|
||||
when '.bz2'
|
||||
archive_type = '-j'
|
||||
root_directory = File.basename url.path, '.tar.bz2'
|
||||
when '.xz'
|
||||
archive_type = '-J'
|
||||
root_directory = File.basename url.path, '.tar.xz'
|
||||
else
|
||||
raise "Unsupported archive type #{url.path}."
|
||||
end
|
||||
target = TMP + 'tools'
|
||||
Net::HTTP.start(url.host, url.port, use_ssl: url.scheme == 'https') do |http|
|
||||
request = Net::HTTP::Get.new url.request_uri
|
||||
|
||||
http.request request do |response|
|
||||
case response
|
||||
when Net::HTTPRedirection
|
||||
download_and_unarchive URI.parse(response['location'])
|
||||
when Net::HTTPSuccess
|
||||
Open3.popen2 'tar', '-C', target.to_path, archive_type, '-xv' do |stdin, stdout, wait_thread|
|
||||
Thread.new do
|
||||
stdout.each { |line| puts line }
|
||||
end
|
||||
|
||||
response.read_body do |chunk|
|
||||
stdin.write chunk
|
||||
end
|
||||
stdin.close
|
||||
|
||||
wait_thread.value
|
||||
end
|
||||
else
|
||||
response.error!
|
||||
end
|
||||
end
|
||||
end
|
||||
target + root_directory
|
||||
end
|
||||
|
||||
def configure_make_install(source_directory, configure_options, env, cwd)
|
||||
configure = source_directory.relative_path_from(cwd) + 'configure'
|
||||
system env, configure.to_path, *configure_options, chdir: cwd.to_path, exception: true
|
||||
system 'make', '-j', Etc.nprocessors.to_s, chdir: cwd.to_path, exception: true
|
||||
system env, 'make', 'install', chdir: cwd.to_path, exception: true
|
||||
end
|
||||
|
||||
directory(TMP + 'tools')
|
||||
|
||||
namespace :cross do
|
||||
BINUTILS_VERSION = '2.44'
|
||||
GLIBC_VERSION = '2.41'
|
||||
KERNEL_VERSION = '5.15.185'
|
||||
GCC_VERSION = "15.1.0"
|
||||
|
||||
task :environment, :target do |t, args|
|
||||
binary_suffix = ''
|
||||
output = gcc_verbose 'gcc'
|
||||
|
||||
if output.start_with? 'Apple clang'
|
||||
binary_suffix = "-#{GCC_VERSION.split('.').first}"
|
||||
end
|
||||
|
||||
ENV['CC'] = "gcc#{binary_suffix}"
|
||||
ENV['CXX'] = "g++#{binary_suffix}"
|
||||
end
|
||||
|
||||
desc 'Build cross binutils'
|
||||
task :binutils, [:target] => :environment do |t, args|
|
||||
options = BuildTarget.new args[:target]
|
||||
source_directory = download_and_unarchive(
|
||||
URI.parse("https://ftp.gnu.org/gnu/binutils/binutils-#{BINUTILS_VERSION}.tar.xz"))
|
||||
|
||||
cwd = source_directory.dirname + 'build-binutils'
|
||||
cwd.mkpath
|
||||
options.rootfs.mkpath
|
||||
|
||||
env = ENV.slice 'CC', 'CXX'
|
||||
configure_options = [
|
||||
"--prefix=#{options.rootfs.realpath}",
|
||||
"--target=#{options.target}",
|
||||
'--disable-nls',
|
||||
'--enable-gprofng=no',
|
||||
'--disable-werror',
|
||||
'--enable-default-hash-style=gnu',
|
||||
'--disable-libquadmath'
|
||||
]
|
||||
configure_make_install source_directory, configure_options, env, cwd
|
||||
end
|
||||
|
||||
desc 'Build stage 1 GCC'
|
||||
task :gcc1, [:target] => :environment do |t, args|
|
||||
options = BuildTarget.new args[:target]
|
||||
source_directory = download_and_unarchive(
|
||||
URI.parse("https://gcc.gnu.org/pub/gcc/releases/gcc-#{GCC_VERSION}/gcc-#{GCC_VERSION}.tar.xz"))
|
||||
|
||||
cwd = source_directory.dirname + 'build-gcc'
|
||||
cwd.mkpath
|
||||
options.rootfs.mkpath
|
||||
options.sysroot.mkpath
|
||||
|
||||
system 'contrib/download_prerequisites', chdir: source_directory.to_path, exception: true
|
||||
configure_options = options.configuration + [
|
||||
"--prefix=#{options.rootfs.realpath}",
|
||||
"--with-sysroot=#{options.sysroot.realpath}",
|
||||
'--enable-languages=c,c++',
|
||||
'--disable-shared',
|
||||
'--disable-bootstrap',
|
||||
'--disable-multilib',
|
||||
'--disable-libmudflap',
|
||||
'--disable-libssp',
|
||||
'--disable-libquadmath',
|
||||
'--disable-libsanitizer',
|
||||
'--disable-threads',
|
||||
'--disable-libatomic',
|
||||
'--disable-libgomp',
|
||||
'--disable-libvtv',
|
||||
'--disable-libstdcxx',
|
||||
'--disable-nls',
|
||||
'--with-newlib',
|
||||
'--without-headers',
|
||||
"--target=#{options.target}",
|
||||
"--build=#{options.build}",
|
||||
"--host=#{options.build}"
|
||||
]
|
||||
flags = '-O2 -fPIC'
|
||||
env = {
|
||||
'CC' => ENV['CC'],
|
||||
'CXX' => ENV['CXX'],
|
||||
'CFLAGS' => flags,
|
||||
'CXXFLAGS' => flags,
|
||||
'PATH' => "#{options.rootfs.realpath + 'bin'}:#{ENV['PATH']}"
|
||||
}
|
||||
configure_make_install source_directory, configure_options, env, cwd
|
||||
end
|
||||
|
||||
desc 'Copy glibc headers'
|
||||
task :headers, [:target] => :environment do |t, args|
|
||||
options = BuildTarget.new args[:target]
|
||||
source_directory = download_and_unarchive(
|
||||
URI.parse("https://ftp.gnu.org/gnu/glibc/glibc-#{GLIBC_VERSION}.tar.xz"))
|
||||
include_directory = TMP + 'tools/include'
|
||||
|
||||
include_directory.mkpath
|
||||
FileUtils.cp (source_directory + 'elf/elf.h'), (include_directory + 'elf.h')
|
||||
end
|
||||
|
||||
desc 'Build linux kernel'
|
||||
task :kernel, [:target] => :environment do |t, args|
|
||||
options = BuildTarget.new args[:target]
|
||||
cwd = download_and_unarchive(
|
||||
URI.parse("https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-#{KERNEL_VERSION}.tar.xz"))
|
||||
|
||||
env = {
|
||||
'CROSS_COMPILE' => "#{options.target}-",
|
||||
'ARCH' => 'riscv',
|
||||
'PATH' => "#{options.rootfs.realpath + 'bin'}:#{ENV['PATH']}",
|
||||
'HOSTCFLAGS' => "-D_UUID_T -D__GETHOSTUUID_H -I#{TMP + 'tools/include'}"
|
||||
}
|
||||
system env, 'make', 'rv32_defconfig', chdir: cwd.to_path, exception: true
|
||||
system env, 'make', '-j', Etc.nprocessors.to_s, chdir: cwd.to_path, exception: true
|
||||
system env, 'make', 'headers', chdir: cwd.to_path, exception: true
|
||||
|
||||
user_directory = options.sysroot + 'usr'
|
||||
|
||||
user_directory.mkpath
|
||||
FileUtils.cp_r (cwd + 'usr/include'), (user_directory + 'include')
|
||||
end
|
||||
|
||||
desc 'Build glibc'
|
||||
task :glibc, [:target] => :environment do |t, args|
|
||||
options = BuildTarget.new args[:target]
|
||||
source_directory = TMP + "tools/glibc-#{GLIBC_VERSION}"
|
||||
configure_options = [
|
||||
'--prefix=/usr',
|
||||
"--host=#{options.target}",
|
||||
"--target=#{options.target}",
|
||||
"--build=#{options.build}",
|
||||
"--enable-kernel=#{KERNEL_VERSION}",
|
||||
"--with-headers=#{options.sysroot.realpath + 'usr/include'}",
|
||||
'--disable-nscd',
|
||||
'--disable-libquadmath',
|
||||
'--disable-libitm',
|
||||
'--disable-werror',
|
||||
'libc_cv_forced_unwind=yes'
|
||||
]
|
||||
bin = options.rootfs.realpath + 'bin'
|
||||
env = {
|
||||
'PATH' => "#{bin}:#{ENV['PATH']}",
|
||||
'MAKE' => 'make', # Otherwise it uses gnumake which can be different and too old.
|
||||
'CC' => "#{options.target}-gcc",
|
||||
'CXX' => "#{options.target}-g++"
|
||||
}
|
||||
cwd = source_directory.dirname + 'build-glibc'
|
||||
cwd.mkpath
|
||||
|
||||
configure = source_directory.relative_path_from(cwd) +'./configure'
|
||||
system env, configure.to_path, *configure_options, chdir: cwd.to_path, exception: true
|
||||
system env, 'make', '-j', Etc.nprocessors.to_s, chdir: cwd.to_path, exception: true
|
||||
system env, 'make', "install_root=#{options.sysroot.realpath}", 'install', chdir: cwd.to_path, exception: true
|
||||
end
|
||||
|
||||
desc 'Build stage 2 GCC'
|
||||
task :gcc2, [:target] => :environment do |t, args|
|
||||
options = BuildTarget.new args[:target]
|
||||
source_directory = TMP + "tools/gcc-#{GCC_VERSION}"
|
||||
cwd = TMP + 'tools/build-gcc'
|
||||
|
||||
FileUtils.rm_rf cwd
|
||||
cwd.mkpath
|
||||
|
||||
configure_options = options.configuration + [
|
||||
"--prefix=#{options.rootfs.realpath}",
|
||||
"--with-sysroot=#{options.sysroot.realpath}",
|
||||
'--enable-languages=c,c++,lto',
|
||||
'--enable-lto',
|
||||
'--enable-shared',
|
||||
'--disable-bootstrap',
|
||||
'--disable-multilib',
|
||||
'--enable-checking=release',
|
||||
'--disable-libssp',
|
||||
'--disable-libquadmath',
|
||||
'--enable-threads=posix',
|
||||
'--with-default-libstdcxx-abi=new',
|
||||
'--disable-nls',
|
||||
"--target=#{options.target}",
|
||||
"--build=#{options.build}",
|
||||
"--host=#{options.build}"
|
||||
]
|
||||
flags = '-O2 -fPIC'
|
||||
env = {
|
||||
'CFLAGS' => flags,
|
||||
'CXXFLAGS' => flags,
|
||||
'PATH' => "#{options.rootfs.realpath + 'bin'}:#{ENV['PATH']}"
|
||||
}
|
||||
configure_make_install source_directory, configure_options, env, cwd
|
||||
end
|
||||
end
|
||||
|
||||
task cross: TMP + 'tools'
|
||||
task :cross, :target do |t, args|
|
||||
args.with_defaults(target: 'riscv32-unknown-linux-gnu')
|
||||
|
||||
Rake::Task['cross:binutils'].invoke args[:target]
|
||||
Rake::Task['cross:gcc1'].invoke args[:target]
|
||||
Rake::Task['cross:headers'].invoke args[:target]
|
||||
Rake::Task['cross:kernel'].invoke args[:target]
|
||||
Rake::Task['cross:glibc'].invoke args[:target]
|
||||
Rake::Task['cross:gcc2'].invoke args[:target]
|
||||
end
|
||||
|
||||
FLAGS = ['-O2', '-g3', '-Wall', '-march=rv32imzicsr', '-mabi=ilp32', '-fno-stack-protector', '-ffreestanding', '-nostdlib', '-static']
|
||||
|
||||
CLEAN.include 'kernel.elf', 'build/riscv32'
|
||||
|
||||
directory(TMP + 'riscv32')
|
||||
|
||||
rule(/^#{TMP}\/[[:alnum:]]+\/[[:alnum:]]+\.o$/ => ->(match) {
|
||||
[Pathname.new(match).basename.sub_ext('.s'), TMP + 'riscv32']
|
||||
}) do |t|
|
||||
ENV['CC'] = 'build/rootfs/bin/riscv32-unknown-linux-gnu-gcc'
|
||||
|
||||
system ENV['CC'], *FLAGS, '-c', '-o', t.name, *t.prerequisites.select { |prerequisite| prerequisite.end_with? '.s' }
|
||||
end
|
||||
|
||||
file 'kernel.elf' => FileList['*.s'].map { |source| (TMP + 'riscv32' + source).sub_ext('.o') } do |t|
|
||||
ENV['CC'] = 'build/rootfs/bin/riscv32-unknown-linux-gnu-gcc'
|
||||
|
||||
system ENV['CC'], *FLAGS, '-T', 'kernel.ld', '-Wl,-Map=kernel.map', '-o', 'kernel.elf', *t.prerequisites
|
||||
end
|
||||
|
||||
task default: 'kernel.elf'
|
||||
task :default do |t|
|
||||
QEMU = 'qemu-system-riscv32'
|
||||
|
||||
system QEMU, '-machine', 'virt', '-bios', 'default', '-nographic', '-serial', 'mon:stdio', '--no-reboot',
|
||||
'-kernel', *t.prerequisites
|
||||
end
|
||||
16
run.sh
16
run.sh
@ -1,16 +0,0 @@
|
||||
#!/bin/sh
|
||||
|
||||
set -xue
|
||||
|
||||
# QEMU file path
|
||||
QEMU=qemu-system-riscv32
|
||||
|
||||
# Path to clang and compiler flags
|
||||
CC=../riscv32-ilp32d--glibc/bin/riscv32-linux-gcc
|
||||
CFLAGS="-O2 -g3 -Wall -march=rv32imzicsr -mabi=ilp32 -fno-stack-protector -ffreestanding -nostdlib -static"
|
||||
|
||||
# Build the kernel
|
||||
$CC $CFLAGS -T kernel.ld -Wl,-Map=kernel.map -o kernel.elf kernel.s common.s
|
||||
|
||||
# Start QEMU
|
||||
$QEMU -machine virt -bios default -nographic -serial mon:stdio --no-reboot -kernel kernel.elf
|
||||
Reference in New Issue
Block a user