def __relocateblock(self, block, sourceaddress, destinationaddress):
blocklength = len(block)
result = []
sourceoffset = destoffset = 0
currentaddress = destinationaddress
for sourceinstruction in ia32.disassemble(block):
sourcelength = len(''.join(sourceinstruction))
destinstruction = sourceinstruction
if ia32.isRelativeBranch(sourceinstruction) or ia32.isRelativeCall(
sourceinstruction):
branchoffset = ia32.getRelativeAddress(
currentaddress, sourceinstruction) - currentaddress
targetoffset = sourceoffset + branchoffset
if (targetoffset < 0) or (targetoffset >= blocklength):
operand = sourceaddress + targetoffset
destinstruction = ia32.setRelativeAddress(
currentaddress, sourceinstruction, operand)
destinstruction = ia32.promoteBranch(destinstruction, 4)
pass
destinstruction = ''.join(destinstruction)
result.append(destinstruction)
destoffset += len(destinstruction)
return ''.join(result)
def __relocateblock(self, block, sourceaddress, destinationaddress):
'''
Will relocate all the instructions in a block. Will promote branch
instructions that target an address outside the block
'''
result = []
sourceoffset, destoffset = 0, 0
for n in ia32.disassemble(block):
instructionlength = len(''.join(n))
if ia32.isRelativeBranch(n) or ia32.isRelativeCall(n):
currentaddress = destinationaddress + len(''.join(result))
branchoffset = ia32.getRelativeAddress(currentaddress,
n) - currentaddress
o = sourceoffset + instructionlength + branchoffset
if (o < 0) or (o >= len(block)):
operand = sourceaddress + o
n = self.__updatebranch(currentaddress, n, operand)
pass
n = ''.join(n)
result.append(n)
sourceoffset += instructionlength
destoffset += len(n)
return ''.join(result)
def __relocateblock(self, block, sourceaddress, destinationaddress):
'''
Will relocate all the instructions in a block. Will promote branch
instructions that target an address outside the block
'''
result = []
sourceoffset,destoffset = 0,0
for n in ia32.disassemble(block):
instructionlength = len(''.join(n))
if ia32.isRelativeBranch(n) or ia32.isRelativeCall(n):
currentaddress = destinationaddress + len(''.join(result))
branchoffset = ia32.getRelativeAddress(currentaddress, n) - currentaddress
o = sourceoffset + instructionlength + branchoffset
if (o<0) or (o>=len(block)):
operand = sourceaddress + o
n = self.__updatebranch(currentaddress, n, operand)
pass
n = ''.join(n)
result.append(n)
sourceoffset += instructionlength
destoffset += len(n)
return ''.join(result)
def __calculateblocksize(self, block):
'''return the maximum size required for a block'''
result = 0
for n in ia32.disassemble(block):
if ia32.isRelativeBranch(n) or ia32.isRelativeCall(n):
n = ia32.promoteBranch(n, 4)
instructionlength = len(''.join(n))
result += instructionlength
return result
def __calculateblocksize(self, block):
'''return the maximum size required for a block'''
result = 0
for n in ia32.disassemble(block):
if ia32.isRelativeBranch(n) or ia32.isRelativeCall(n):
n = ia32.promoteBranch(n, 4)
instructionlength = len(''.join(n))
result += instructionlength
return result
def __relocateblock(self, block, sourceaddress, destinationaddress):
blocklength = len(block)
result = []
sourceoffset = destoffset = 0
currentaddress = destinationaddress
for sourceinstruction in ia32.disassemble(block):
sourcelength = len(''.join(sourceinstruction))
destinstruction = sourceinstruction
if ia32.isRelativeBranch(sourceinstruction) or ia32.isRelativeCall(sourceinstruction):
branchoffset = ia32.getRelativeAddress(currentaddress, sourceinstruction) - currentaddress
targetoffset = sourceoffset + branchoffset
if (targetoffset < 0) or (targetoffset >= blocklength):
operand = sourceaddress + targetoffset
destinstruction = ia32.setRelativeAddress(currentaddress, sourceinstruction, operand)
destinstruction = ia32.promoteBranch(destinstruction,4)
pass
destinstruction = ''.join(destinstruction)
result.append(destinstruction)
destoffset += len(destinstruction)
return ''.join(result)