So I'm doing this assignment from an online CMU class where I am writing an instruction-level MIPS simulator. There are several input files given in asm format, which have to be converted into hexadecimal form in order to be read by the simulator. An asm2hex Python program is provided which uses spim to convert the asm to hexadecimal, but it doesn't seem to work. There's an unknown argument to spim '-vasm', and the program doesn't actually output any files when run. The asm2hex.py is down here:
#!/usr/bin/python
import os, argparse, subprocess
# parse arguments
parser = argparse.ArgumentParser()
parser.add_argument("fasm", metavar="input.s", help="the MIPS assembly file (ASCII)")
args = parser.parse_args()
fasm = args.fasm
fhex = os.path.splitext(args.fasm)[0] + ".x"
# run SPIM (the actual MIPS assembler)
SPIM = "/afs/ece/class/ece447/bin/spim447"
cmd = [SPIM, "-notrap", "-vasm", fasm, fhex]
subprocess.call(cmd)
# SPIM outputs many files; but we are interested in only one
cmd = ["mv", fhex + ".text.dat", fhex]
subprocess.call(cmd)
# remove unnecessary two lines from the file
lines = open(fhex).readlines()
lines = map(lambda x: x.lstrip(), lines)
data = str.join('', lines[2:])
data = str.join('\n', data.split())
open(fhex, 'w').write(data)
# remove all other files
cmd = ["rm", fhex + ".*.dat"]
cmd = str.join(' ', cmd)
subprocess.call(cmd, shell=True) # we need a shell to expand the wildcard
The program basically stores the hexa code found in the text segment shown in xspim to a .x file. Can this code be fixed, or can someone suggest an alternative way to extract that part of the text segment?
