adds first version of the expanded as assembler from mikko

test/code_generator.rb

@@ -0,0 +1,27 @@
+
+if (__FILE__ == $0)
+  gen = Asm::ARMCodeGenerator.new
+
+  gen.instance_eval {
+    mov r0, 5
+    loop_start = label
+    loop_start.set!
+    subs r0, r0, 1
+    bne loop_start
+    bx lr
+  }
+
+  require 'objectwriter'
+  require 'tempfile'
+  writer = Asm::ObjectWriter.new(Elf::Constants::TARGET_ARM)
+  writer.set_text gen.assemble
+
+
+  begin
+    writer.save('arm_as_generated.o')
+  rescue => err
+    puts 'as: cannot save output file: ' + err.message
+    exit
+  end
+
+end

test/elf_object.rb

@@ -0,0 +1,19 @@
+if (__FILE__ == $0)
+  obj = ELF::ObjectFile.new ELF::TARGET_ARM
+
+  sym_strtab = ELF::StringTableSection.new(".strtab")
+  obj.add_section sym_strtab
+  symtab = ELF::SymbolTableSection.new(".symtab", sym_strtab)
+  obj.add_section symtab
+
+  text_section = ELF::TextSection.new(".text")
+  obj.add_section text_section
+
+  symtab.add_func_symbol "_start", 0, text_section, ELF::STB_GLOBAL
+
+  fp = File.open("test.o", "wb")
+  obj.write fp
+
+  fp.close
+end
+