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from miasm2.core.asmblock import AsmConstraint, disasmEngine
from miasm2.arch.arm.arch import mn_arm, mn_armt
def cb_arm_fix_call(mn, cur_bloc, symbol_pool, offsets_to_dis, *args, **kwargs):
"""
for arm:
MOV LR, PC
LDR PC, [R5, 0x14]
* is a subcall *
"""
if len(cur_bloc.lines) < 2:
return
l1 = cur_bloc.lines[-1]
l2 = cur_bloc.lines[-2]
if l1.name != "LDR":
return
if l2.name != "MOV":
return
values = mn.pc.values()
if not l1.args[0] in values:
return
if not l2.args[1] in values:
return
cur_bloc.add_cst(l1.offset + 4, AsmConstraint.c_next, symbol_pool)
offsets_to_dis.add(l1.offset + 4)
cb_arm_funcs = [cb_arm_fix_call]
def cb_arm_disasm(*args, **kwargs):
for func in cb_arm_funcs:
func(*args, **kwargs)
class dis_armb(disasmEngine):
attrib = 'b'
def __init__(self, bs=None, **kwargs):
super(dis_armb, self).__init__(mn_arm, self.attrib, bs, **kwargs)
self.dis_block_callback = cb_arm_disasm
class dis_arml(disasmEngine):
attrib = 'l'
def __init__(self, bs=None, **kwargs):
super(dis_arml, self).__init__(mn_arm, self.attrib, bs, **kwargs)
self.dis_block_callback = cb_arm_disasm
class dis_armtb(disasmEngine):
attrib = 'b'
def __init__(self, bs=None, **kwargs):
super(dis_armtb, self).__init__(mn_armt, self.attrib, bs, **kwargs)
class dis_armtl(disasmEngine):
attrib = 'l'
def __init__(self, bs=None, **kwargs):
super(dis_armtl, self).__init__(mn_armt, self.attrib, bs, **kwargs)
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