Make setRegisters more robust

Closes #1683

docs/source/rop/rop.rst

@@ -15,6 +15,7 @@
    from pwnlib.tubes.process import process
    from pwnlib import shellcraft
    from pwnlib.util.misc import which
+   import pwnlib.data
 
    context.clear()
 

pwnlib/rop/gadgets.py

@@ -39,7 +39,7 @@ class Gadget(object):
     move = 0
 
     def __init__(self, address, insns, regs, move):
-        self.address = address
+        self.address = int(address)
         self.insns   = insns
         self.regs    = regs
         self.move    = move

pwnlib/rop/rop.py

@@ -1364,7 +1364,11 @@ def __getattr__(self, k):
                     regs.append(pop.match(insn).group(1))
                     sp_move += context.bytes
                 elif add.match(insn):
-                    sp_move += int(add.match(insn).group(1), 16)
+                    arg = int(add.match(insn).group(1), 16)
+                    sp_move += arg
+                    while arg >= context.bytes:
+                        regs.append(hex(arg))
+                        arg -= context.bytes
                 elif ret.match(insn):
                     sp_move += context.bytes
                 elif leave.match(insn):

pwnlib/shellcraft/__init__.py

@@ -186,4 +186,5 @@ def find_module(self, fullname, path=None):
 
     def load_module(self, fullname):
         return sys.modules[fullname]
+
 sys.meta_path.append(LazyImporter())

pwnlib/tubes/process.py

@@ -217,6 +217,8 @@ class process(tube):
     #: Have we seen the process stop?  If so, this is a unix timestamp.
     _stop_noticed = 0
 
+    proc = None
+
     def __init__(self, argv = None,
                  shell = False,
                  executable = None,