Miasm2: miasm2.arch.arm.arch.arm_immed Class Reference

Inheritance diagram for miasm2.arch.arm.arch.arm_immed:

Collaboration diagram for miasm2.arch.arm.arch.arm_immed:

Public Member Functions
def	decode

def	encode

def	fromstring

Public Attributes
	expr

	value

Static Public Attributes
	parser = deref

Detailed Description

Definition at line 1311 of file arch.py.

Member Function Documentation

def miasm2.arch.arm.arch.arm_immed.decode	(	self,
		v
	)

Definition at line 1314 of file arch.py.

 
     def decode(self, v):
         if self.parent.immop.value == 1:
             imm = ExprInt32((self.parent.immedH.value << 4) | v)
         else:
             imm = gpregs.expr[v]
         if self.parent.updown.value == 0:
             imm = -imm
         if self.parent.ppi.value:
             e = ExprOp('preinc', self.parent.rn.expr, imm)
         else:
             e = ExprOp('postinc', self.parent.rn.expr, imm)
         if self.parent.wback.value == 1:
             e = ExprOp('wback', e)
         self.expr = ExprMem(e)
 
         return True

miasm2.arch.arm.arch.arm_immed.decode

def decode

Definition: arch.py:1314

miasm2.arch.arm.arch.arm_immed.expr

expr

Definition: arch.py:1327

miasm2.expression.expression.ExprInt32

def ExprInt32

Definition: expression.py:1157

miasm2.expression.expression.ExprOp

Definition: expression.py:718

miasm2.expression.expression.ExprMem

Definition: expression.py:651

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def miasm2.arch.arm.arch.arm_immed.encode ( self )

Definition at line 1331 of file arch.py.

 
     def encode(self):
         self.parent.immop.value = 1
         self.parent.updown.value = 1
         e = self.expr
         if not isinstance(e, ExprMem):
             return False
         e = e.arg
         if isinstance(e, ExprOp) and e.op == 'wback':
             self.parent.wback.value = 1
             e = e.args[0]
         else:
             self.parent.wback.value = 0
         if e.op == "postinc":
             self.parent.ppi.value = 0
         elif e.op == "preinc":
             self.parent.ppi.value = 1
         else:
             # XXX default
             self.parent.ppi.value = 1
         self.parent.rn.expr = e.args[0]
         if len(e.args) == 1:
             self.value = 0
             self.parent.immedH.value = 0
             return True
         e = e.args[1]
         if isinstance(e, ExprInt):
             v = int(e.arg)
             if v < 0 or v & (1 << 31):
                 self.parent.updown.value = 0
                 v = (-v) & 0xFFFFFFFF
             if v > 0xff:
                 log.debug('cannot encode imm XXX')
                 return False
             self.value = v & 0xF
             self.parent.immedH.value = v >> 4
             return True
 
         self.parent.immop.value = 0
         if isinstance(e, ExprOp) and len(e.args) == 1 and e.op == "-":
             self.parent.updown.value = 0
             e = e.args[0]
         if e in gpregs.expr:
             self.value = gpregs.expr.index(e)
             self.parent.immedH.value = 0x0
             return True
         else:
             raise ValueError('e should be int: %r' % e)

miasm2.arch.arm.arch.arm_immed.encode

def encode

Definition: arch.py:1331

miasm2.arch.arm.arch.arm_immed.value

value

Definition: arch.py:1352

miasm2.arch.arm.arch.arm_immed.expr

expr

Definition: arch.py:1327

def miasm2.core.cpu.m_arg.fromstring	(	self,
		s,
		parser_result = `None`
	)

inherited

Definition at line 604 of file cpu.py.

 
     def fromstring(self, s, parser_result=None):
         if parser_result:
             e, start, stop = parser_result[self.parser]
             self.expr = e
             return start, stop
         try:
             v, start, stop = self.parser.scanString(s).next()
         except StopIteration:
             return None, None
         self.expr = v[0]
         return start, stop
 

miasm2.core.cpu.m_arg.expr

expr

Definition: cpu.py:607

miasm2.core.cpu.m_arg.fromstring

def fromstring

Definition: cpu.py:604

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Public Member Functions

Public Attributes

Static Public Attributes

Detailed Description

Member Function Documentation

Member Data Documentation