src/soc/simulator/gas.py

   1 import tempfile
   2 import subprocess
   3 import struct
   4 # Copyright (C) 2020 Michael Nolan <mtnolan2640@gmail.com>
   5
   6
   7 def get_assembled_instruction(instruction, bigendian=False):
   8     if bigendian:
   9         endian_fmt = "elf64-big"
  10         obj_fmt = "-be"
  11     else:
  12         endian_fmt = "elf64-little"
  13         obj_fmt = "-le"
  14     with tempfile.NamedTemporaryFile(suffix=".o") as outfile:
  15         args = ["powerpc64-linux-gnu-as",
  16                 obj_fmt,
  17                 "-o",
  18                 outfile.name]
  19         p = subprocess.Popen(args, stdin=subprocess.PIPE)
  20         p.communicate(instruction.encode('utf-8'))
  21         assert(p.wait() == 0)
  22
  23         with tempfile.NamedTemporaryFile(suffix=".bin") as binfile:
  24             args = ["powerpc64-linux-gnu-objcopy",
  25                     "-I", endian_fmt,
  26                     "-O", "binary",
  27                     outfile.name,
  28                     binfile.name]
  29             subprocess.check_output(args)
  30             binary = struct.unpack('>i', binfile.read(4))[0]
  31             return binary