def compile(f, fout):
global ADDR_SHIFT
parsed_source = None
with open(f, 'r') as source:
parsed_source = map(parse_line, enumerate(source.readlines()))
for label in COMPILER_LABELS:
info = COMPILER_LABELS[label]
if info['end'] == -1:
error(info['start'], "missing a matching .end call for label: " + label)
if len(COMPILER_ERRORS) != 0:
return (False, COMPILER_ERRORS)
# 0. flatten the list
parsed_source = list(itertools.chain(*parsed_source))
# 1. remove blank lines
pps = [line for line in parsed_source if len(line) != 0]
# 2. find all label markers and calculate their absolute positions
abspos = {}
for (n, line) in enumerate(pps):
if line[0] == '.':
label_id = line.replace('.', '')
abspos[label_id] = ADDR_SHIFT + (n - len(abspos.keys()))
pps[n] = None
debug.log(" # %d: found marker for label '%s'" % (n, label_id))
pps = [line for line in pps if line != None]
# 3. replace label markers with actual locations
# (and expand $! with current position)
for (n, line) in enumerate(pps):
pos = line.find('%')
if pos != -1:
label_id = line[pos:line.rfind('%')+1].replace('%', '')
replacement = abspos[label_id]
pps[n] = (line[0:pos] + util.fixedbin(replacement, 8)).ljust(16, '0')
debug.log("%3d: inserting label address lbl%s -> %d" % (n, label_id, replacement))
pos = line.find('!')
if pos != -1:
debug.log("%3d: inserting current location" % n)
pps[n] = (line[0:pos] + util.fixedbin(n, 8)).ljust(16, '0')
debug.log("%3d: %s" % (n, pps[n]))
with open(fout, 'wb') as out:
debug.log(" # Writing binary to '%s'..." % fout)
[out.write(raw_instr(line)) for line in pps]
if ADDR_SHIFT > 0:
print(" Note: You're using address shifting. Binary won't be executable on its own.")
return (True, None)
def endf(source, lbl):
if not lbl in COMPILER_LABELS:
error(source[0], ".endf called for an undefined label: " + lbl)
return
n = source[0]
debug.log(" # %d: inserting implicit return instruction" % n)
COMPILER_LABELS[lbl]['end'] = n
return [util.fixedbin(instructions.MNEM_DICT['ret'], 5).ljust(16, '0')]
def endf(source, lbl):
if not lbl in COMPILER_LABELS:
error(source[0], ".endf called for an undefined label: " + lbl)
return
n = source[0]
debug.log(" # %d: inserting implicit return instruction" % n)
COMPILER_LABELS[lbl]['end'] = n
return [util.fixedbin(instructions.MNEM_DICT['ret'], 5).ljust(16, '0')]
def compile(f, fout):
global ADDR_SHIFT
parsed_source = None
with open(f, 'r') as source:
parsed_source = map(parse_line, enumerate(source.readlines()))
for label in COMPILER_LABELS:
info = COMPILER_LABELS[label]
if info['end'] == -1:
error(info['start'],
"missing a matching .end call for label: " + label)
if len(COMPILER_ERRORS) != 0:
return (False, COMPILER_ERRORS)
# 0. flatten the list
parsed_source = list(itertools.chain(*parsed_source))
# 1. remove blank lines
pps = [line for line in parsed_source if len(line) != 0]
# 2. find all label markers and calculate their absolute positions
abspos = {}
for (n, line) in enumerate(pps):
if line[0] == '.':
label_id = line.replace('.', '')
abspos[label_id] = ADDR_SHIFT + (n - len(abspos.keys()))
pps[n] = None
debug.log(" # %d: found marker for label '%s'" % (n, label_id))
pps = [line for line in pps if line != None]
# 3. replace label markers with actual locations
# (and expand $! with current position)
for (n, line) in enumerate(pps):
pos = line.find('%')
if pos != -1:
label_id = line[pos:line.rfind('%') + 1].replace('%', '')
replacement = abspos[label_id]
pps[n] = (line[0:pos] + util.fixedbin(replacement, 8)).ljust(
16, '0')
debug.log("%3d: inserting label address lbl%s -> %d" %
(n, label_id, replacement))
pos = line.find('!')
if pos != -1:
debug.log("%3d: inserting current location" % n)
pps[n] = (line[0:pos] + util.fixedbin(n, 8)).ljust(16, '0')
debug.log("%3d: %s" % (n, pps[n]))
with open(fout, 'wb') as out:
debug.log(" # Writing binary to '%s'..." % fout)
[out.write(raw_instr(line)) for line in pps]
if ADDR_SHIFT > 0:
print(
" Note: You're using address shifting. Binary won't be executable on its own."
)
return (True, None)
opcode = instructions.MNEM_DICT[instr]
except KeyError, e:
error(n, "unknown instruction: '%s'" % instr)
return ''
bas = instructions.INSTRUCTIONS[opcode].__bas__
parsed_args = [parse_arg(n, arg.strip()) for arg in line[1:]]
try:
args = [arg.zfill(bas[n]) for (n, arg) in enumerate(parsed_args)]
except IndexError, e:
error(
n, "too many arguments: '%s' requires %d but provided with %d" %
(instr, len(bas), len(parsed_args)))
return ['']
return [(util.fixedbin(opcode, 5) + ''.join(args)).ljust(16, '0')]
# $var_name => expands variable
# $! => address of the current instruction
# @a => 97 => 1100001
# %fn => address of function/label 'fn'
# 123 => 1111011
def parse_arg(n, arg):
sig = arg[0]
val = arg[1:].decode('string_escape')
if sig == '$':
if val == '!':
return '!'.ljust(8, '!')
else:
def store(rx, md):
val = util.fixedbin(regs.REGS[rx], 16)
log(" # store %s (%d) => m%s" % (val, regs.REGS[rx], md))
regs.MEM[md] = val
error(n, "unknown instruction: '%s'" % instr)
return ''
bas = instructions.INSTRUCTIONS[opcode].__bas__
parsed_args = [parse_arg(n, arg.strip()) for arg in line[1:]]
try:
args= [arg.zfill(bas[n]) for (n, arg) in enumerate(parsed_args)]
except IndexError, e:
error(n, "too many arguments: '%s' requires %d but provided with %d" % (
instr,
len(bas),
len(parsed_args)
))
return ['']
return [(util.fixedbin(opcode, 5) + ''.join(args)).ljust(16, '0')]
# $var_name => expands variable
# $! => address of the current instruction
# @a => 97 => 1100001
# %fn => address of function/label 'fn'
# 123 => 1111011
def parse_arg(n, arg):
sig = arg[0]
val = arg[1:].decode('string_escape')
if sig == '$':
if val == '!':
return '!'.ljust(8, '!')
else:
if not val in COMPILER_VARS:
