Class: Voodoo::NasmELFGenerator
- Inherits:
-
Object
- Object
- Voodoo::NasmELFGenerator
- Includes:
- CommandPostProcessor
- Defined in:
- lib/voodoo/generators/nasm_elf_generator.rb
Overview
Class that generates ELF object files by invoking nasm on the output of a code generator that generates NASM assembly.
Instance Method Summary collapse
-
#initialize(nasmgenerator, nasm_extra_args) ⇒ NasmELFGenerator
constructor
A new instance of NasmELFGenerator.
- #output_file_name(input_name) ⇒ Object
- #output_file_suffix ⇒ Object
-
#write(io) ⇒ Object
Writes the generated code to the given IO handle.
Methods included from CommandPostProcessor
shell_encode, tempfile, write_file_to_io
Constructor Details
#initialize(nasmgenerator, nasm_extra_args) ⇒ NasmELFGenerator
Returns a new instance of NasmELFGenerator.
8 9 10 11 12 |
# File 'lib/voodoo/generators/nasm_elf_generator.rb', line 8 def initialize nasmgenerator, nasm_extra_args @nasmgenerator = nasmgenerator @nasm_extra_args = nasm_extra_args @output_file_suffix = '.o' end |
Instance Method Details
#output_file_name(input_name) ⇒ Object
16 17 18 |
# File 'lib/voodoo/generators/nasm_elf_generator.rb', line 16 def output_file_name input_name input_name.sub(/\.voo$/, '') + @output_file_suffix end |
#output_file_suffix ⇒ Object
20 21 22 |
# File 'lib/voodoo/generators/nasm_elf_generator.rb', line 20 def output_file_suffix @output_file_suffix end |
#write(io) ⇒ Object
Writes the generated code to the given IO handle
25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 |
# File 'lib/voodoo/generators/nasm_elf_generator.rb', line 25 def write io # Create temporary file to write NASM code to if io.respond_to? :path base = File.basename(io.path).sub(/([^.]*).*/, "\\1") else base = self.class.name end Tempfile.open(base + '.asm') do |nasmfile| begin Tempfile.open(base + '.o') do |elffile| begin elffile.close # Write NASM code to nasmfile @nasmgenerator.write nasmfile nasmfile.close # Find out the name of the nasm executable if ENV.has_key? 'NASM' nasm = ENV['NASM'] elsif ENV.has_key? 'YASM' nasm = ENV['YASM'] else nasm = Voodoo::Config.nasm_command end # Invoke nasm on nasmfile command = "#{nasm} #{@nasm_extra_args}" + " -o #{shell_encode elffile.path}" + " #{shell_encode nasmfile.path}" if system(command) write_file_to_io elffile.path, io else raise "Command (#{command}) failed " + " with status #{$?.exitstatus}" end ensure elffile.unlink end end ensure nasmfile.unlink end end end |