def execute(self, proc, inst):
if not utils.checkCondition(proc, inst):
return
modes = component.getAllUtilitiesRegisteredFor(IARMLSMAddressingMode)
for mode in modes:
if utils.testInstruction(mode, inst):
start_address, end_address = mode.getVal(proc, inst)
break
register_list = Bitset(utils.getBits(inst, 0, 16), 32)
address = start_address
print "Entra"
for i in range(16):
if register_list[i]:
print i, getattr(proc, 'r' + str(i))
proc.saveAddr(address, getattr(proc, 'r' + str(i)))
address += 4
print "Sale"
if end_address != address - 4:
raise exceptions.DataAbort()
def execute(self, proc, inst):
if not utils.checkCondition(proc, inst):
return
modes = component.getAllUtilitiesRegisteredFor(IARMLSMAddressingMode)
for mode in modes:
if utils.testInstruction(mode, inst):
start_address, end_address = mode.getVal(proc, inst)
break
register_list = Bitset(utils.getBits(inst, 0, 16), 32)
address = start_address
for i in range(15):
if register_list[i]:
setattr(proc, 'r' + str(i), proc.readAddr(address, 4))
address += 4
if register_list[15]:
value = proc.readAddr(address, 4)
proc.pc = value & 0xFFFFFFFE
address += 4
if end_address != address - 4:
raise exceptions.DataAbort()
def execute(self, proc, inst):
shifter_operand = 0
shifter_carry_out = 0
if not checkCondition(proc, inst):
return
S = utils.getBits(inst, 20)
I = utils.getBits(inst, 25)
rd = utils.getBits(inst, 12, 4)
rd = 'r' + str(rd)
rn = utils.getBits(inst, 16, 4)
rn = 'r' + str(rn)
rdVal = getattr(proc, rd)
rnVal = getattr(proc, rn)
modes = component.getAllUtilitiesRegisteredFor(IARMDPAddressingMode)
for mode in modes:
if testInstruction(mode, inst):
shifter_operand, shifter_carry_out = mode.getVal(proc, inst)
break
setattr(proc, rd, rnVal ^ shifter_operand)
if S == 1 and rd == 'r15':
try:
proc.cpsr = proc.spsr
except:
print "UNPREDICTABLE"
elif S == 1:
proc.setStatusFlag('N', utils.getBits(getattr(proc, rd), 31))
proc.setStatusFlag('Z', int(getattr(proc, rd) == 0))
proc.setStatusFlag('C', shifter_carry_out)
def execute(self, proc, inst):
shifter_operand = 0
shifter_carry_out = 0
if not checkCondition(proc, inst):
return
rn = utils.getBits(inst, 16, 4)
rn = 'r' + str(rn)
rnVal = getattr(proc, rn)
modes = component.getAllUtilitiesRegisteredFor(IARMDPAddressingMode)
for mode in modes:
if testInstruction(mode, inst):
shifter_operand, shifter_carry_out = mode.getVal(proc, inst)
break
rnBitset = Bitset(rnVal, 32)
shifterBitset = Bitset(shifter_operand, 32)
alu_out, carry = rnBitset + shifter_operand
if utils.getBits(rnVal, 31) == 0 and utils.getBits(int(result), 31) == 1:
v = 1
else:
v = 0
proc.setStatusFlag('N', utils.getBits(int(alu_out), 31))
proc.setStatusFlag('Z', int(int(alu_out) == 0))
proc.setStatusFlag('C', carry)
proc.setStatusFlag('V', v)
def run(self):
processor = self
instructions = component.getAllUtilitiesRegisteredFor(IARMInstruction)
instructionLog = open('ilog', 'w')
while self.__running:
inst = processor.fetch()
processor.step()
executed = False
if inst == 0:
break
try:
for instruction in instructions:
if testInstruction(instruction, inst):
instructionLog.write(str(type(instruction)) + '\n')
instructionLog.flush()
instruction.execute(processor, inst)
executed = True
break
except exceptions.ProcessorException as ex:
ex.preprocess(self)
executed = True
if not executed:
print "Instruction not recognized %x" % inst
self.__running = False
def execute(self, proc, inst):
if not utils.checkCondition(proc, inst):
return
modes = component.getAllUtilitiesRegisteredFor(IARMLSMAddressingMode)
for mode in modes:
if utils.testInstruction(mode, inst):
start_address, end_address = mode.getVal(proc, inst)
break
print "Ejecutaste un ldm(3)"
def execute(self, proc, inst):
if not utils.checkCondition(proc, inst):
return
modes = component.getAllUtilitiesRegisteredFor(IARMLSAddressingMode)
for mode in modes:
if utils.testInstruction(mode, inst):
address = mode.getVal(proc, inst)
break
rd = utils.getBits(inst, 12, 4)
rd = 'r' + str(rd)
proc.saveAddr(address, getattr(proc, rd))
def execute(self, proc, inst):
if not utils.checkCondition(proc, inst):
return
modes = component.getAllUtilitiesRegisteredFor(IARMLSAddressingMode)
for mode in modes:
if utils.testInstruction(mode, inst):
address = mode.getVal(proc, inst)
break
rd = utils.getBits(inst, 12, 4)
rd = 'r' + str(rd)
data = proc.readAddr(address, 2)
data = utils.signExtend(data, 16, 32)
setattr(proc, rd, data)
def execute(self, proc, inst):
shifter_operand = 0
shifter_carry_out = 0
if not checkCondition(proc, inst):
return
S = utils.getBits(inst, 20)
I = utils.getBits(inst, 25)
rd = utils.getBits(inst, 12, 4)
rd = 'r' + str(rd)
rn = utils.getBits(inst, 16, 4)
rn = 'r' + str(rn)
rdVal = getattr(proc, rd)
rnVal = getattr(proc, rn)
rnBitset = Bitset(rnVal, 32)
carryBitset = Bitset(proc.statusFlag('C'), 32)
modes = component.getAllUtilitiesRegisteredFor(IARMDPAddressingMode)
for mode in modes:
if testInstruction(mode, inst):
shifter_operand, shifter_carry_out = mode.getVal(proc, inst)
break
shifter_bitset = Bitset(shifter_operand, 32)
result, carry = shifter_bitset - rnBitset
resultBitset = Bitset(result, 32)
carryBitset[0] = not carryBitset[0]
result, carry = resultBitset - carryBitset
setattr(proc, rd, int(result))
if S == 1 and rd == 'r15':
try:
proc.cpsr = proc.spsr
except:
print "UNPREDICTABLE"
elif S == 1:
if utils.getBits(rdVal, 31) == 0 and utils.getBits(int(result), 31) == 1:
v = 1
else:
v = 0
proc.setStatusFlag('N', utils.getBits(getattr(proc, rd), 31))
proc.setStatusFlag('Z', int(getattr(proc, rd) == 0))
proc.setStatusFlag('C', int(carry == 0))
proc.setStatusFlag('V', v)
print "Ejecutaste un rsc"
def execute(self, proc, inst):
if not utils.checkCondition(proc, inst):
return
modes = component.getAllUtilitiesRegisteredFor(IARMLSAddressingMode)
for mode in modes:
if utils.testInstruction(mode, inst):
address = mode.getVal(proc, inst)
break
rd = utils.getBits(inst, 12, 4)
rd = 'r' + str(rd)
data = proc.readAddr(address)
if rd == 'r15':
proc.pc = data & 0xfffffffe
else:
setattr(proc, rd, data)
def execute(self, proc, inst):
shifter_operand = 0
shifter_carry_out = 0
if not checkCondition(proc, inst):
return
rn = utils.getBits(inst, 16, 4)
rn = 'r' + str(rn)
rnVal = getattr(proc, rn)
modes = component.getAllUtilitiesRegisteredFor(IARMDPAddressingMode)
for mode in modes:
if testInstruction(mode, inst):
shifter_operand, shifter_carry_out = mode.getVal(proc, inst)
break
alu_out = rnVal ^ shifter_operand
proc.setStatusFlag('N', utils.getBits(alu_out, 31))
proc.setStatusFlag('Z', int(alu_out == 0))
proc.setStatusFlag('C', shifter_carry_out)