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def save_state(self, state, state_id=None):
"""
Save a state to storage, return identifier.
:param state: The state to save
:param int state_id: If not None force the state id potentially overwriting old states
:return: New state id
:rtype: int
"""
assert... |
def _named_stream(self, name, binary=False):
"""
Create an indexed output stream i.e. 'test_00000001.name'
:param name: Identifier for the stream
:return: A context-managed stream-like object
"""
with self._store.save_stream(self._named_key(name), binary=binary) as s:
... |
def t_UINTN(t):
r"uint(?P<size>256|248|240|232|224|216|208|200|192|184|176|168|160|152|144|136|128|120|112|104|96|88|80|72|64|56|48|40|32|24|16|8)"
size = int(t.lexer.lexmatch.group('size'))
t.value = ('uint', size)
return t |
def t_INTN(t):
r"int(?P<size>256|248|240|232|224|216|208|200|192|184|176|168|160|152|144|136|128|120|112|104|96|88|80|72|64|56|48|40|32|24|16|8)"
size = int(t.lexer.lexmatch.group('size'))
t.value = ('int', size)
return t |
def t_UFIXEDMN(t):
r"ufixed(?P<M>256|248|240|232|224|216|208|200|192|184|176|168|160|152|144|136|128|120|112|104|96|88|80|72|64|56|48|40|32|24|16|8)x(?P<N>80|79|78|77|76|75|74|73|72|71|70|69|68|67|66|65|64|63|62|61|60|59|58|57|56|55|54|53|52|51|50|49|48|47|46|45|44|43|42|41|40|39|38|37|36|35|34|33|32|31|30|29|28|27... |
def t_BYTESM(t):
r"bytes(?P<nbytes>32|31|30|29|28|27|26|25|24|23|22|21|20|19|18|17|16|15|14|13|12|11|10|9|8|7|6|5|4|3|2|1)"
size = int(t.lexer.lexmatch.group('nbytes'))
t.value = ('bytesM', size)
return t |
def p_dynamic_fixed_type(p):
"""
T : T LBRAKET NUMBER RBRAKET
"""
reps = int(p[3])
base_type = p[1]
p[0] = ('array', reps, base_type) |
def cmp_regs(cpu, should_print=False):
"""
Compare registers from a remote gdb session to current mcore.
:param manticore.core.cpu Cpu: Current cpu
:param bool should_print: Whether to print values to stdout
:return: Whether or not any differences were detected
:rtype: bool
"""
differin... |
def post_mcore(state, last_instruction):
"""
Handle syscalls (import memory) and bail if we diverge
"""
global in_helper
# Synchronize qemu state to manticore's after a system call
if last_instruction.mnemonic.lower() == 'svc':
# Synchronize all writes that have happened
writes ... |
def sync_svc(state):
"""
Mirror some service calls in manticore. Happens after qemu executed a SVC
instruction, but before manticore did.
"""
syscall = state.cpu.R7 # Grab idx from manticore since qemu could have exited
name = linux_syscalls.armv7[syscall]
logger.debug(f"Syncing syscall: {n... |
def initialize(state):
"""
Synchronize the stack and register state (manticore->qemu)
"""
logger.debug(f"Copying {stack_top - state.cpu.SP} bytes in the stack..")
stack_bottom = min(state.cpu.SP, gdb.getR('SP'))
for address in range(stack_bottom, stack_top):
b = state.cpu.read_int(addres... |
def to_constant(expression):
"""
Iff the expression can be simplified to a Constant get the actual concrete value.
This discards/ignore any taint
"""
value = simplify(expression)
if isinstance(value, Expression) and value.taint:
raise ValueError("Can not simplify tainted values t... |
def visit(self, node, use_fixed_point=False):
"""
The entry point of the visitor.
The exploration algorithm is a DFS post-order traversal
The implementation used two stacks instead of a recursion
The final result is store in self.result
:param node: Node to explore
... |
def _method(self, expression, *args):
"""
Overload Visitor._method because we want to stop to iterate over the
visit_ functions as soon as a valid visit_ function is found
"""
assert expression.__class__.__mro__[-1] is object
for cls in expression.__class__.__mro__:
... |
def visit_Operation(self, expression, *operands):
""" constant folding, if all operands of an expression are a Constant do the math """
operation = self.operations.get(type(expression), None)
if operation is not None and \
all(isinstance(o, Constant) for o in operands):
... |
def visit_Operation(self, expression, *operands):
""" constant folding, if all operands of an expression are a Constant do the math """
if all(isinstance(o, Constant) for o in operands):
expression = constant_folder(expression)
if self._changed(expression, operands):
expr... |
def visit_BitVecConcat(self, expression, *operands):
""" concat( extract(k1, 0, a), extract(sizeof(a)-k1, k1, a)) ==> a
concat( extract(k1, beg, a), extract(end, k1, a)) ==> extract(beg, end, a)
"""
op = expression.operands[0]
value = None
end = None
begini... |
def visit_BitVecExtract(self, expression, *operands):
""" extract(sizeof(a), 0)(a) ==> a
extract(16, 0)( concat(a,b,c,d) ) => concat(c, d)
extract(m,M)(and/or/xor a b ) => and/or/xor((extract(m,M) a) (extract(m,M) a)
"""
op = expression.operands[0]
begining = exp... |
def visit_BitVecAdd(self, expression, *operands):
""" a + 0 ==> a
0 + a ==> a
"""
left = expression.operands[0]
right = expression.operands[1]
if isinstance(right, BitVecConstant):
if right.value == 0:
return left
if isinstance(le... |
def visit_BitVecSub(self, expression, *operands):
""" a - 0 ==> 0
(a + b) - b ==> a
(b + a) - b ==> a
"""
left = expression.operands[0]
right = expression.operands[1]
if isinstance(left, BitVecAdd):
if self._same_constant(left.operands[0], ri... |
def visit_BitVecOr(self, expression, *operands):
""" a | 0 => a
0 | a => a
0xffffffff & a => 0xffffffff
a & 0xffffffff => 0xffffffff
"""
left = expression.operands[0]
right = expression.operands[1]
if isinstance(right, BitVecConstant):
... |
def visit_BitVecAnd(self, expression, *operands):
""" ct & x => x & ct move constants to the right
a & 0 => 0 remove zero
a & 0xffffffff => a remove full mask
(b & ct2) & ct => b & (ct&ct2) associative property
(a &... |
def visit_BitVecShiftLeft(self, expression, *operands):
""" a << 0 => a remove zero
a << ct => 0 if ct > sizeof(a) remove big constant shift
"""
left = expression.operands[0]
right = expression.operands[1]
if isinstance(right, BitVecConstant):... |
def visit_ArraySelect(self, expression, *operands):
""" ArraySelect (ArrayStore((ArrayStore(x0,v0) ...),xn, vn), x0)
-> v0
"""
arr, index = operands
if isinstance(arr, ArrayVariable):
return
if isinstance(index, BitVecConstant):
ival = ind... |
def _type_size(ty):
""" Calculate `static` type size """
if ty[0] in ('int', 'uint', 'bytesM', 'function'):
return 32
elif ty[0] in ('tuple'):
result = 0
for ty_i in ty[1]:
result += ABI._type_size(ty_i)
return result
elif t... |
def function_call(type_spec, *args):
"""
Build transaction data from function signature and arguments
"""
m = re.match(r"(?P<name>[a-zA-Z_][a-zA-Z_0-9]*)(?P<type>\(.*\))", type_spec)
if not m:
raise EthereumError("Function signature expected")
ABI._check_and_... |
def serialize(ty, *values, **kwargs):
"""
Serialize value using type specification in ty.
ABI.serialize('int256', 1000)
ABI.serialize('(int, int256)', 1000, 2000)
"""
try:
parsed_ty = abitypes.parse(ty)
except Exception as e:
# Catch and re... |
def function_selector(method_name_and_signature):
"""
Makes a function hash id from a method signature
"""
s = sha3.keccak_256()
s.update(method_name_and_signature.encode())
return bytes(s.digest()[:4]) |
def _serialize_uint(value, size=32, padding=0):
"""
Translates a python integral or a BitVec into a 32 byte string, MSB first
"""
if size <= 0 or size > 32:
raise ValueError
from .account import EVMAccount # because of circular import
if not isinstance(value... |
def _serialize_int(value, size=32, padding=0):
"""
Translates a signed python integral or a BitVec into a 32 byte string, MSB first
"""
if size <= 0 or size > 32:
raise ValueError
if not isinstance(value, (int, BitVec)):
raise ValueError
if issymbo... |
def _deserialize_uint(data, nbytes=32, padding=0, offset=0):
"""
Read a `nbytes` bytes long big endian unsigned integer from `data` starting at `offset`
:param data: sliceable buffer; symbolic buffer of Eth ABI encoded data
:param nbytes: number of bytes to read starting from least sign... |
def _deserialize_int(data, nbytes=32, padding=0):
"""
Read a `nbytes` bytes long big endian signed integer from `data` starting at `offset`
:param data: sliceable buffer; symbolic buffer of Eth ABI encoded data
:param nbytes: number of bytes to read starting from least significant byte
... |
def concretized_args(**policies):
"""
Make sure an EVM instruction has all of its arguments concretized according to
provided policies.
Example decoration:
@concretized_args(size='ONE', address='')
def LOG(self, address, size, *topics):
...
The above will make sure tha... |
def to_dict(self, mevm):
"""
Only meant to be used with concrete Transaction objects! (after calling .concretize())
"""
return dict(type=self.sort,
from_address=self.caller,
from_name=mevm.account_name(self.caller),
to_address=s... |
def dump(self, stream, state, mevm, conc_tx=None):
"""
Concretize and write a human readable version of the transaction into the stream. Used during testcase
generation.
:param stream: Output stream to write to. Typically a file.
:param manticore.ethereum.State state: state that... |
def _get_memfee(self, address, size=1):
"""
This calculates the amount of extra gas needed for accessing to
previously unused memory.
:param address: base memory offset
:param size: size of the memory access
"""
if not issymbolic(size) and size == 0:
... |
def read_code(self, address, size=1):
"""
Read size byte from bytecode.
If less than size bytes are available result will be pad with \x00
"""
assert address < len(self.bytecode)
value = self.bytecode[address:address + size]
if len(value) < size:
value... |
def instruction(self):
"""
Current instruction pointed by self.pc
"""
# FIXME check if pc points to invalid instruction
# if self.pc >= len(self.bytecode):
# return InvalidOpcode('Code out of range')
# if self.pc in self.invalid:
# raise InvalidOpcod... |
def _push(self, value):
"""
Push into the stack
ITEM0
ITEM1
ITEM2
sp-> {empty}
"""
assert isinstance(value, int) or isinstance(value, BitVec) and value.size == 256
if len(self.stack) >= 1024:
raise StackOverflow()
... |
def _top(self, n=0):
"""Read a value from the top of the stack without removing it"""
if len(self.stack) - n < 0:
raise StackUnderflow()
return self.stack[n - 1] |
def _checkpoint(self):
"""Save and/or get a state checkpoint previous to current instruction"""
#Fixme[felipe] add a with self.disabled_events context mangr to Eventful
if self._checkpoint_data is None:
if not self._published_pre_instruction_events:
self._published_pr... |
def _rollback(self):
"""Revert the stack, gas, pc and memory allocation so it looks like before executing the instruction"""
last_pc, last_gas, last_instruction, last_arguments, fee, allocated = self._checkpoint_data
self._push_arguments(last_arguments)
self._gas = last_gas
self.... |
def _check_jmpdest(self):
"""
If the previous instruction was a JUMP/JUMPI and the conditional was
True, this checks that the current instruction must be a JUMPDEST.
Here, if symbolic, the conditional `self._check_jumpdest` would be
already constrained to a single concrete value... |
def _store(self, offset, value, size=1):
"""Stores value in memory as a big endian"""
self.memory.write_BE(offset, value, size)
for i in range(size):
self._publish('did_evm_write_memory', offset + i, Operators.EXTRACT(value, (size - i - 1) * 8, 8)) |
def DIV(self, a, b):
"""Integer division operation"""
try:
result = Operators.UDIV(a, b)
except ZeroDivisionError:
result = 0
return Operators.ITEBV(256, b == 0, 0, result) |
def SDIV(self, a, b):
"""Signed integer division operation (truncated)"""
s0, s1 = to_signed(a), to_signed(b)
try:
result = (Operators.ABS(s0) // Operators.ABS(s1) * Operators.ITEBV(256, (s0 < 0) != (s1 < 0), -1, 1))
except ZeroDivisionError:
result = 0
re... |
def MOD(self, a, b):
"""Modulo remainder operation"""
try:
result = Operators.ITEBV(256, b == 0, 0, a % b)
except ZeroDivisionError:
result = 0
return result |
def SMOD(self, a, b):
"""Signed modulo remainder operation"""
s0, s1 = to_signed(a), to_signed(b)
sign = Operators.ITEBV(256, s0 < 0, -1, 1)
try:
result = (Operators.ABS(s0) % Operators.ABS(s1)) * sign
except ZeroDivisionError:
result = 0
return O... |
def ADDMOD(self, a, b, c):
"""Modulo addition operation"""
try:
result = Operators.ITEBV(256, c == 0, 0, (a + b) % c)
except ZeroDivisionError:
result = 0
return result |
def EXP_gas(self, base, exponent):
"""Calculate extra gas fee"""
EXP_SUPPLEMENTAL_GAS = 10 # cost of EXP exponent per byte
def nbytes(e):
result = 0
for i in range(32):
result = Operators.ITEBV(512, Operators.EXTRACT(e, i * 8, 8) != 0, i + 1, result)
... |
def SIGNEXTEND(self, size, value):
"""Extend length of two's complement signed integer"""
# FIXME maybe use Operators.SEXTEND
testbit = Operators.ITEBV(256, size <= 31, size * 8 + 7, 257)
result1 = (value | (TT256 - (1 << testbit)))
result2 = (value & ((1 << testbit) - 1))
... |
def LT(self, a, b):
"""Less-than comparison"""
return Operators.ITEBV(256, Operators.ULT(a, b), 1, 0) |
def GT(self, a, b):
"""Greater-than comparison"""
return Operators.ITEBV(256, Operators.UGT(a, b), 1, 0) |
def SGT(self, a, b):
"""Signed greater-than comparison"""
# http://gavwood.com/paper.pdf
s0, s1 = to_signed(a), to_signed(b)
return Operators.ITEBV(256, s0 > s1, 1, 0) |
def BYTE(self, offset, value):
"""Retrieve single byte from word"""
offset = Operators.ITEBV(256, offset < 32, (31 - offset) * 8, 256)
return Operators.ZEXTEND(Operators.EXTRACT(value, offset, 8), 256) |
def SHA3(self, start, size):
"""Compute Keccak-256 hash"""
# read memory from start to end
# http://gavwood.com/paper.pdf
data = self.try_simplify_to_constant(self.read_buffer(start, size))
if issymbolic(data):
known_sha3 = {}
# Broadcast the signal
... |
def CALLDATALOAD(self, offset):
"""Get input data of current environment"""
if issymbolic(offset):
if solver.can_be_true(self._constraints, offset == self._used_calldata_size):
self.constraints.add(offset == self._used_calldata_size)
raise ConcretizeArgument(1, p... |
def CALLDATACOPY(self, mem_offset, data_offset, size):
"""Copy input data in current environment to memory"""
if issymbolic(size):
if solver.can_be_true(self._constraints, size <= len(self.data) + 32):
self.constraints.add(size <= len(self.data) + 32)
raise Concr... |
def CODECOPY(self, mem_offset, code_offset, size):
"""Copy code running in current environment to memory"""
self._allocate(mem_offset, size)
GCOPY = 3 # cost to copy one 32 byte word
copyfee = self.safe_mul(GCOPY, Operators.UDIV(self.safe_add(size, 31), 32))
self._co... |
def EXTCODECOPY(self, account, address, offset, size):
"""Copy an account's code to memory"""
extbytecode = self.world.get_code(account)
self._allocate(address + size)
for i in range(size):
if offset + i < len(extbytecode):
self._store(address + i, extbytecod... |
def MLOAD(self, address):
"""Load word from memory"""
self._allocate(address, 32)
value = self._load(address, 32)
return value |
def MSTORE(self, address, value):
"""Save word to memory"""
if istainted(self.pc):
for taint in get_taints(self.pc):
value = taint_with(value, taint)
self._allocate(address, 32)
self._store(address, value, 32) |
def MSTORE8(self, address, value):
"""Save byte to memory"""
if istainted(self.pc):
for taint in get_taints(self.pc):
value = taint_with(value, taint)
self._allocate(address, 1)
self._store(address, Operators.EXTRACT(value, 0, 8), 1) |
def SLOAD(self, offset):
"""Load word from storage"""
storage_address = self.address
self._publish('will_evm_read_storage', storage_address, offset)
value = self.world.get_storage_data(storage_address, offset)
self._publish('did_evm_read_storage', storage_address, offset, value)
... |
def SSTORE(self, offset, value):
"""Save word to storage"""
storage_address = self.address
self._publish('will_evm_write_storage', storage_address, offset, value)
#refund = Operators.ITEBV(256,
# previous_value != 0,
# Opera... |
def JUMPI(self, dest, cond):
"""Conditionally alter the program counter"""
self.pc = Operators.ITEBV(256, cond != 0, dest, self.pc + self.instruction.size)
#This set ups a check for JMPDEST in the next instruction if cond != 0
self._set_check_jmpdest(cond != 0) |
def SWAP(self, *operands):
"""Exchange 1st and 2nd stack items"""
a = operands[0]
b = operands[-1]
return (b,) + operands[1:-1] + (a,) |
def CREATE(self, value, offset, size):
"""Create a new account with associated code"""
address = self.world.create_account(address=EVMWorld.calculate_new_address(sender=self.address, nonce=self.world.get_nonce(self.address)))
self.world.start_transaction('CREATE',
... |
def CREATE(self, value, offset, size):
"""Create a new account with associated code"""
tx = self.world.last_transaction # At this point last and current tx are the same.
address = tx.address
if tx.result == 'RETURN':
self.world.set_code(tx.address, tx.return_data)
el... |
def CALLCODE(self, gas, _ignored_, value, in_offset, in_size, out_offset, out_size):
"""Message-call into this account with alternative account's code"""
self.world.start_transaction('CALLCODE',
address=self.address,
data=self.rea... |
def RETURN(self, offset, size):
"""Halt execution returning output data"""
data = self.read_buffer(offset, size)
raise EndTx('RETURN', data) |
def SELFDESTRUCT(self, recipient):
"""Halt execution and register account for later deletion"""
#This may create a user account
recipient = Operators.EXTRACT(recipient, 0, 160)
address = self.address
#FIXME for on the known addresses
if issymbolic(recipient):
... |
def human_transactions(self):
"""Completed human transaction"""
txs = []
for tx in self.transactions:
if tx.depth == 0:
txs.append(tx)
return tuple(txs) |
def current_vm(self):
"""current vm"""
try:
_, _, _, _, vm = self._callstack[-1]
return vm
except IndexError:
return None |
def current_transaction(self):
"""current tx"""
try:
tx, _, _, _, _ = self._callstack[-1]
if tx.result is not None:
#That tx finished. No current tx.
return None
return tx
except IndexError:
return None |
def current_human_transaction(self):
"""Current ongoing human transaction"""
try:
tx, _, _, _, _ = self._callstack[0]
if tx.result is not None:
#That tx finished. No current tx.
return None
assert tx.depth == 0
return tx
... |
def get_storage_data(self, storage_address, offset):
"""
Read a value from a storage slot on the specified account
:param storage_address: an account address
:param offset: the storage slot to use.
:type offset: int or BitVec
:return: the value
:rtype: int or Bit... |
def set_storage_data(self, storage_address, offset, value):
"""
Writes a value to a storage slot in specified account
:param storage_address: an account address
:param offset: the storage slot to use.
:type offset: int or BitVec
:param value: the value to write
:... |
def get_storage_items(self, address):
"""
Gets all items in an account storage
:param address: account address
:return: all items in account storage. items are tuple of (index, value). value can be symbolic
:rtype: list[(storage_index, storage_value)]
"""
storage... |
def has_storage(self, address):
"""
True if something has been written to the storage.
Note that if a slot has been erased from the storage this function may
lose any meaning.
"""
storage = self._world_state[address]['storage']
array = storage.array
while ... |
def block_hash(self, block_number=None, force_recent=True):
"""
Calculates a block's hash
:param block_number: the block number for which to calculate the hash, defaulting to the most recent block
:param force_recent: if True (the default) return zero for any block that is in the future ... |
def new_address(self, sender=None, nonce=None):
"""Create a fresh 160bit address"""
if sender is not None and nonce is None:
nonce = self.get_nonce(sender)
new_address = self.calculate_new_address(sender, nonce)
if sender is None and new_address in self:
return s... |
def create_account(self, address=None, balance=0, code=None, storage=None, nonce=None):
"""
Low level account creation. No transaction is done.
:param address: the address of the account, if known. If omitted, a new address will be generated as closely to the Yellow Paper as possible.
:p... |
def create_contract(self, price=0, address=None, caller=None, balance=0, init=None, gas=None):
"""
Create a contract account. Sends a transaction to initialize the contract
:param address: the address of the new account, if known. If omitted, a new address will be generated as closely to the Ye... |
def start_transaction(self, sort, address, price=None, data=None, caller=None, value=0, gas=2300):
"""
Initiate a transaction
:param sort: the type of transaction. CREATE or CALL or DELEGATECALL
:param address: the address of the account which owns the code that is executing.
:pa... |
def _get_expand_imm_carry(self, carryIn):
"""Manually compute the carry bit produced by expanding an immediate operand (see ARMExpandImm_C)"""
insn = struct.unpack('<I', self.cpu.instruction.bytes)[0]
unrotated = insn & Mask(8)
shift = Operators.EXTRACT(insn, 8, 4)
_, carry = sel... |
def _write_APSR(self, apsr):
"""Auxiliary function - Writes flags from a full APSR (only 4 msb used)"""
V = Operators.EXTRACT(apsr, 28, 1)
C = Operators.EXTRACT(apsr, 29, 1)
Z = Operators.EXTRACT(apsr, 30, 1)
N = Operators.EXTRACT(apsr, 31, 1)
self.write('APSR_V', V)
... |
def _swap_mode(self):
"""Toggle between ARM and Thumb mode"""
assert self.mode in (cs.CS_MODE_ARM, cs.CS_MODE_THUMB)
if self.mode == cs.CS_MODE_ARM:
self.mode = cs.CS_MODE_THUMB
else:
self.mode = cs.CS_MODE_ARM |
def set_flags(self, **flags):
"""
Note: For any unmodified flags, update _last_flags with the most recent
committed value. Otherwise, for example, this could happen:
overflow=0
instr1 computes overflow=1, updates _last_flags, doesn't commit
instr2 updates all... |
def _shift(cpu, value, _type, amount, carry):
"""See Shift() and Shift_C() in the ARM manual"""
assert(cs.arm.ARM_SFT_INVALID < _type <= cs.arm.ARM_SFT_RRX_REG)
# XXX: Capstone should set the value of an RRX shift to 1, which is
# asserted in the manual, but it sets it to 0, so we have ... |
def MOV(cpu, dest, src):
"""
Implement the MOV{S} instruction.
Note: If src operand is PC, temporarily release our logical PC
view and conform to the spec, which dictates PC = curr instr + 8
:param Armv7Operand dest: The destination operand; register.
:param Armv7Operan... |
def MOVT(cpu, dest, src):
"""
MOVT writes imm16 to Rd[31:16]. The write does not affect Rd[15:0].
:param Armv7Operand dest: The destination operand; register
:param Armv7Operand src: The source operand; 16-bit immediate
"""
assert src.type == 'immediate'
imm = sr... |
def MRC(cpu, coprocessor, opcode1, dest, coprocessor_reg_n, coprocessor_reg_m, opcode2):
"""
MRC moves to ARM register from coprocessor.
:param Armv7Operand coprocessor: The name of the coprocessor; immediate
:param Armv7Operand opcode1: coprocessor specific opcode; 3-bit immediate
... |
def LDRD(cpu, dest1, dest2, src, offset=None):
"""Loads double width data from memory."""
assert dest1.type == 'register'
assert dest2.type == 'register'
assert src.type == 'memory'
mem1 = cpu.read_int(src.address(), 32)
mem2 = cpu.read_int(src.address() + 4, 32)
... |
def STRD(cpu, src1, src2, dest, offset=None):
"""Writes the contents of two registers to memory."""
assert src1.type == 'register'
assert src2.type == 'register'
assert dest.type == 'memory'
val1 = src1.read()
val2 = src2.read()
writeback = cpu._compute_writeback(... |
def LDREX(cpu, dest, src, offset=None):
"""
LDREX loads data from memory.
* If the physical address has the shared TLB attribute, LDREX
tags the physical address as exclusive access for the current
processor, and clears any exclusive access tag for this
processor fo... |
def STREX(cpu, status, *args):
"""
STREX performs a conditional store to memory.
:param Armv7Operand status: the destination register for the returned status; register
"""
# TODO: implement conditional return with appropriate status --GR, 2017-06-06
status.write(0)
... |
def _UXT(cpu, dest, src, src_width):
"""
Helper for UXT* family of instructions.
:param ARMv7Operand dest: the destination register; register
:param ARMv7Operand dest: the source register; register
:param int src_width: bits to consider of the src operand
"""
val... |
def ADR(cpu, dest, src):
"""
Address to Register adds an immediate value to the PC value, and writes the result to the destination register.
:param ARMv7Operand dest: Specifies the destination register.
:param ARMv7Operand src:
Specifies the label of an instruction or litera... |
def ADDW(cpu, dest, src, add):
"""
This instruction adds an immediate value to a register value, and writes the result to the destination register.
It doesn't update the condition flags.
:param ARMv7Operand dest: Specifies the destination register. If omitted, this register is the same ... |
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