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require 'open3'
require 'rake/clean'
CLOBBER.include 'build'
CROSS_GCC = '../riscv32-ilp32d--glibc/bin/riscv32-linux-gcc'
SYSROOT = '../riscv32-ilp32d--glibc/riscv32-buildroot-linux-gnu/sysroot'
QEMU = 'qemu-riscv32'
def assemble_stage(output, compiler, source)
arguments = [QEMU, '-L', SYSROOT, *compiler]
puts(arguments * ' ')
puts
Open3.popen2(*arguments) do |qemu_in, qemu_out|
qemu_in.write File.read(*source)
qemu_in.close
IO.copy_stream qemu_out, output
qemu_out.close
end
end
desc 'Final stage'
task default: ['build/stage2b', 'build/stage2b.s', 'boot/stage2.elna'] do |t|
exe, previous_output, source = t.prerequisites
cat_arguments = ['cat', source]
compiler_arguments = [QEMU, '-L', SYSROOT, exe]
diff_arguments = ['diff', '-Nur', previous_output, '-']
Open3.pipeline(cat_arguments, compiler_arguments, diff_arguments)
end
directory 'build'
desc 'Initial stage'
file 'build/stage1' => ['boot/stage1.s', 'boot/common-boot.s', 'build'] do |t|
source = t.prerequisites.filter { |prerequisite| prerequisite.end_with? '.s' }
sh CROSS_GCC, '-nostdlib', '-o', t.name, *source
end
file 'build/stage2a.s' => ['build/stage1', 'boot/stage2.elna'] do |t|
source, exe = t.prerequisites.partition { |prerequisite| prerequisite.end_with? '.elna' }
File.open t.name, 'w' do |output|
assemble_stage output, exe, source
end
end
file 'build/stage2a' => ['build/stage2a.s', 'boot/common-boot.s'] do |t|
sh CROSS_GCC, '-nostdlib', '-o', t.name, *t.prerequisites
end
file 'build/stage2b.s' => ['build/stage2a', 'boot/stage2.elna'] do |t|
source, exe = t.prerequisites.partition { |prerequisite| prerequisite.end_with? '.elna' }
File.open t.name, 'w' do |output|
assemble_stage output, exe, source
end
end
file 'build/stage2b' => ['build/stage2b.s', 'boot/common-boot.s'] do |t|
sh CROSS_GCC, '-nostdlib', '-o', t.name, *t.prerequisites
end
desc 'Print remaining lines to rewrite'
task :statistics do
def is_false_positive(word)
word.start_with?('(*') ||
word.start_with?('*)') ||
('A'..'Z').include?(word[0]) ||
/^[[:alpha:]][[:digit:]]$/.match(word)
end
lines = File.read('boot/stage2.elna')
.split("\n")
.select { |line| line.start_with? "\t" }
.map { |line| line.delete_prefix("\t").split(' ') }
.reject { |words| is_false_positive(words.first) }
.group_by do |words|
if words.first.length < 5
case words.first
when 'goto'
'Statements'
else
words.first
end
else
'Statements'
end
end
lines.each do |key, value|
puts "#{key}: #{value.count}"
end
end
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