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# 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 'open3'
require 'pathname'
require 'rake/clean'
STAGES = Dir.glob('boot/stage*')
.collect { |stage| File.basename stage }
.sort { |a, b| a.delete_prefix('stage').to_i <=> b.delete_prefix('stage').to_i }
.drop(1) # First assembly stage does not count.
CLEAN.include 'build/boot', 'build/valid'
def compile(*arguments)
sh(ENV.fetch('CC', 'gcc'), '-fpie', '-g', *arguments)
end
def run(exe)
ENV.fetch('QEMU', '').split << exe
end
task default: :boot
desc 'Final stage'
task boot: "build/valid/#{STAGES.last}/cl"
task boot: "build/valid/#{STAGES.last}/cl.s"
task boot: "boot/#{STAGES.last}/cl.elna" do |t|
groupped = t.prerequisites.group_by { |stage| File.extname stage }.transform_values(&:first)
exe = groupped['']
expected = groupped['.s']
source = groupped['.elna']
cat_arguments = ['cat', source]
diff_arguments = ['diff', '-Nur', '--text', expected, '-']
Open3.pipeline(cat_arguments, run(exe), diff_arguments)
end
desc 'Convert previous stage language into the current stage language'
task :convert do
File.open('boot/stage16.elna', 'w') do |current_stage|
skip = false
File.readlines('boot/stage15.elna').each do |line|
if line.strip == 'type'
current_stage << <<~SNIP
type
_elna_tac_declaration = record
next: Word;
name: Word;
length: Word;
body: Word
end;
_integer_literal_node = record
kind: Word;
value: Word;
length: Word
end;
SNIP
elsif line.start_with?('proc _elna_tac_declaration_size')
skip = true
elsif line.start_with?('proc _elna_tac_declaration_get_')
skip = true
elsif line.start_with?('proc _elna_tac_declaration_set_')
skip = true
elsif line.start_with?('proc _integer_literal_node_size')
skip = true
elsif line.start_with?('proc _integer_literal_node_get_')
skip = true
elsif line.start_with?('proc _integer_literal_node_set_')
skip = true
elsif line.start_with?('end') && skip
skip = false
elsif !skip
current_stage << line
end
end
end
end
rule /^build\/[[:alpha:]]+\/stage[[:digit:]]+\/cl$/ => ->(match) {
"#{match}.o"
} do |t|
arguments_path = Pathname.new('boot') + Pathname.new(t.name).dirname.basename + 'linker.arg'
if arguments_path.exist?
arguments1 = ['--dynamic-linker', '/lib32/ld-linux-riscv32-ilp32d.so.1', '/usr/lib/crt1.o', '/usr/lib/crti.o', '-lc']
arguments2 = ['/usr/lib/crtn.o']
else
arguments1 = arguments2 = []
end
sh(ENV.fetch('LD', 'ld'), '-o', t.name, *arguments1, *t.prerequisites, *arguments2)
end
rule /^build\/[[:alpha:]]+\/stage[[:digit:]]+\/cl.o$/ => ->(match) {
match.ext('.s')
} do |t|
compile('-c', '-o', t.name, *t.prerequisites)
end
STAGES.each do |stage|
previous = stage.delete_prefix('stage').to_i.pred
directory "build/valid/#{stage}"
directory "build/boot/#{stage}"
file "build/valid/#{stage}/cl.s" => ["build/boot/#{stage}/cl", "boot/#{stage}/cl.elna", "build/valid/#{stage}"] do |t|
exe, source = t.prerequisites
cat_arguments = ['cat', source]
last_stdout, wait_threads = Open3.pipeline_r(cat_arguments, run(exe))
IO.copy_stream last_stdout, t.name
end
file "build/boot/#{stage}/cl.s" => ["build/valid/stage#{previous}/cl", "boot/#{stage}/cl.elna", "build/boot/#{stage}"] do |t|
exe, source = t.prerequisites
cat_arguments = ['cat', source]
last_stdout, wait_threads = Open3.pipeline_r(cat_arguments, run(exe))
IO.copy_stream last_stdout, t.name
end
end
#
# Stage 1.
#
directory 'build/valid/stage1'
directory 'build/boot/stage1'
file 'build/valid/stage1/cl' => ['build/valid/stage1.s'] do |t|
compile('-nostdlib', '-o', t.name, *t.prerequisites)
end
file 'build/valid/stage1.s' => ['build/boot/stage1/cl', 'boot/stage1.s', 'build/valid/stage1'] do |t|
source, exe, = t.prerequisites.partition { |prerequisite| prerequisite.end_with? '.s' }
cat_arguments = ['cat', *source]
last_stdout, wait_threads = Open3.pipeline_r(cat_arguments, run(exe.first))
IO.copy_stream last_stdout, t.name
end
file 'build/boot/stage1/cl' => ['build/boot/stage1', 'boot/stage1.s'] do |t|
source = t.prerequisites.select { |prerequisite| prerequisite.end_with? '.s' }
compile('-nostdlib', '-o', t.name, *source)
end
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