src/soc/simulator/gas.py

   1 import tempfile
   2 import subprocess
   3 import struct
   4
   5
   6 def get_assembled_instruction(instruction, bigendian=False):
   7     if bigendian:
   8         endian_fmt = "elf64-big"
   9         obj_fmt = "-be"
  10     else:
  11         endian_fmt = "elf64-little"
  12         obj_fmt = "-le"
  13     with tempfile.NamedTemporaryFile(suffix=".o") as outfile:
  14         args = ["powerpc64-linux-gnu-as",
  15                 obj_fmt,
  16                 "-o",
  17                 outfile.name]
  18         p = subprocess.Popen(args, stdin=subprocess.PIPE)
  19         p.communicate(instruction.encode('utf-8'))
  20         assert(p.wait() == 0)
  21
  22         with tempfile.NamedTemporaryFile(suffix=".bin") as binfile:
  23             args = ["powerpc64-linux-gnu-objcopy",
  24                     "-I", endian_fmt,
  25                     "-O", "binary",
  26                     outfile.name,
  27                     binfile.name]
  28             subprocess.check_output(args)
  29             binary = struct.unpack('>i', binfile.read(4))[0]
  30             return binary