def main():
global mode, usr, syst,svc,abt,und,irq,fiq, abtRegister, usrRegister, svcRegister, fiqRegister,irqRegister,undRegister,systRegister
global ADC, ADD, AND, BIC, CMN, CMP, EOR, MOV, MVN,ORR, RSB, RSC, SBC, SUB, TEQ, TST, ADC, ADD, AND, BIC, CMN, CMP, EOR, MOV, MVN,ORR, RSB, RSC, SBC, SUB, TEQ, TST,COND
global MRS, MSR , BX, CLZ, BLX2, BLX1,LDR, LDRB
global LDRBT,LDRH,LDRSB,LDRSH,LDRT,STR,STRB,STRBT,STRH,STRTMLA,MUL,SMLAL,SMULL,UMLAL,UMULL, LDM1, LDM2, LDM3, STM1, STM2
global LR,PC,CPSR,SPSR
addMode = 0
usr = 0
syst = 1
svc = 2
abt = 3
und = 4
irq = 5
fiq = 6
mode = usr
LR = 14
PC = 15
CPSR = 16
SPSR = 17
## will add ability to pass in file name as arguement.
#filename = 'code/template.machine'
#filename = 'code/instTests/adc/adc.test'
# inits our regs
register = regInit()
# inits our memory
# sets the registers up
register = setMode(mode, usr, register)
# ganks a binary, converts to hex
#g = g[0].strip("\n")
# print()
# print(g)
Memory, register[PC] = elf.loadfile(sys.stdin.readlines()[0].strip("\n"))
#print(hex(entry))
#print(Memory)
ADC, ADD, AND, BIC, CMN, CMP, EOR, MOV, MVN,ORR, RSB, RSC, SBC, SUB, TEQ, TST = 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16
# Misc Insts, Branching.
MRS, MSR , BX, CLZ, BLX2, BLX1, BBL = 17,18,19,20,21,22,48
# Multiplies:
MLA,MUL,SMLAL,SMULL,UMLAL,UMULL = 23,24,25,26,27,28
## load/store mults:
LDM1, LDM2, LDM3, STM1, STM2 = 29,30,31,32,33
# extra load/store instructions:
LDR, LDRB, LDRBT,LDRH,LDRSB,LDRSH,LDRT,STR,STRB,STRBT,STRH,STRT= 34,35,36,37,38,39,40,41,42,43,44,45
DP32BitImmediate = 0
DPImmediateShift= 1
DPRegShift = 2
MLSImmOffIndex = 3
MLSRegOffIndex = 4
LSImmOffIndex = 5
LSRegOffIndex = 6
LSScaleRegOffIndex = 7
LSMultiple = 8
UND = 96
IRREL = 10
UNPRED = 99
BKPT = 98
SWI = 97
PC = 15
CPSR = 16
SPSR = 17
COND = 0
#barrelShifter = BarrellShifter()
#register[PC] = 0x8054
while True: # represents the main loop
for i in range(16):
print("R[{0}] :".format(i),hex(register[i]))
word = fetch(Memory, register)
addMode = BarrellShifter.determineMode(word)
inst = Instructions.parseInstruction(word)
register[PC] = register[PC] +4
instStr = setInstString(inst)
if inst == BKPT or inst == SWI:
handleException(word,inst,addMode)
else:
if addMode == DP32BitImmediate or addMode == DPImmediateShift or addMode == DPRegShift:
shifter_operand, shifter_carry_out, register = BarrellShifter.do_data_proc(word,addMode,inst,register)
register = Instructions.do_dp(shifter_operand,shifter_carry_out,register,inst,word)
elif addMode == MLSImmOffIndex or addMode == MLSRegOffIndex:
address,register = BarrellShifter.do_misc_l_s(word,addMode,inst,register)
register, Memory = Instructions.do_LS(address,Memory,register,inst,word)
elif addMode == LSMultiple:
start_address,end_address,register = BarrellShifter.do_l_s_mult(word,addMode,inst,register)
Memory, register = Instructions.do_LSM(start_address,end_address,Memory,register,inst,word)
elif addMode == LSImmOffIndex or addMode == LSRegOffIndex or addMode == LSScaleRegOffIndex:
address, register = BarrellShifter.do_l_s(word,addMode,inst,register)
register, Memory = Instructions.do_LS(address,Memory,register,inst,word)
elif inst >22 and inst <29:
register = Instructions.do_multiplies(Memory,register,word,inst,addMode)
else:
register = Instructions.do_misc(Memory,register,word,inst,addMode)
print("Word: ", bin(word),". Add Mode: ", addMode, "Inst: ", instStr)