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import os
import tempfile
import idaapi
import idc
import idautils
from miasm2.core.bin_stream_ida import bin_stream_ida
from miasm2.core.asmblock import expr_is_label, AsmLabel, is_int
from miasm2.expression.simplifications import expr_simp
from miasm2.analysis.data_flow import dead_simp
from miasm2.ir.ir import AssignBlock, IRBlock
from utils import guess_machine, expr2colorstr
# Override Miasm asmblock default label naming convention to shrink block size
# in IDA
def label_init(self, name="", offset=None):
self.fixedblocs = False
if is_int(name):
name = "loc_%X" % (int(name) & 0xFFFFFFFFFFFFFFFF)
self.name = name
self.attrib = None
if offset is None:
self.offset = None
else:
self.offset = int(offset)
def label_str(self):
if isinstance(self.offset, (int, long)):
return "%s:0x%x" % (self.name, self.offset)
else:
return "%s:%s" % (self.name, str(self.offset))
AsmLabel.__init__ = label_init
AsmLabel.__str__ = label_str
def color_irblock(irblock, ir_arch):
out = []
lbl = idaapi.COLSTR(str(irblock.label), idaapi.SCOLOR_INSN)
out.append(lbl)
for assignblk in irblock.irs:
for dst, src in sorted(assignblk.iteritems()):
dst_f = expr2colorstr(ir_arch.arch.regs.all_regs_ids, dst)
src_f = expr2colorstr(ir_arch.arch.regs.all_regs_ids, src)
line = idaapi.COLSTR("%s = %s" % (dst_f, src_f), idaapi.SCOLOR_INSN)
out.append(' %s' % line)
out.append("")
out.pop()
dst = str(' Dst: %s' % irblock.dst)
dst = idaapi.COLSTR(dst, idaapi.SCOLOR_RPTCMT)
out.append(dst)
return "\n".join(out)
class GraphMiasmIR(idaapi.GraphViewer):
def __init__(self, ir_arch, title, result):
idaapi.GraphViewer.__init__(self, title)
self.ir_arch = ir_arch
self.result = result
self.names = {}
def OnRefresh(self):
self.Clear()
addr_id = {}
for irblock in self.ir_arch.blocks.values():
id_irblock = self.AddNode(color_irblock(irblock, self.ir_arch))
addr_id[irblock] = id_irblock
for irblock in self.ir_arch.blocks.values():
if not irblock:
continue
all_dst = self.ir_arch.dst_trackback(irblock)
for dst in all_dst:
if not expr_is_label(dst):
continue
dst = dst.name
if not dst in self.ir_arch.blocks:
continue
dst_block = self.ir_arch.blocks[dst]
node1 = addr_id[irblock]
node2 = addr_id[dst_block]
self.AddEdge(node1, node2)
return True
def OnGetText(self, node_id):
return str(self[node_id])
def OnSelect(self, node_id):
return True
def OnClick(self, node_id):
return True
def OnCommand(self, cmd_id):
if self.cmd_test == cmd_id:
print 'TEST!'
return
print "command:", cmd_id
def Show(self):
if not idaapi.GraphViewer.Show(self):
return False
self.cmd_test = self.AddCommand("Test", "F2")
if self.cmd_test == 0:
print "Failed to add popup menu item!"
return True
def build_graph(verbose=False, simplify=False):
machine = guess_machine()
mn, dis_engine, ira = machine.mn, machine.dis_engine, machine.ira
if verbose:
print "Arch", dis_engine
fname = idc.GetInputFile()
if verbose:
print fname
bs = bin_stream_ida()
mdis = dis_engine(bs)
ir_arch = ira(mdis.symbol_pool)
# populate symbols with ida names
for addr, name in idautils.Names():
# print hex(ad), repr(name)
if name is None:
continue
mdis.symbol_pool.add_label(name, addr)
if verbose:
print "start disasm"
addr = idc.ScreenEA()
if verbose:
print hex(addr)
blocks = mdis.dis_multibloc(addr)
if verbose:
print "generating graph"
open('asm_flow.dot', 'w').write(blocks.dot())
print "generating IR... %x" % addr
for block in blocks:
if verbose:
print 'ADD'
print block
ir_arch.add_block(block)
if verbose:
print "IR ok... %x" % addr
for irb in ir_arch.blocks.itervalues():
irs = []
for assignblk in irb.irs:
new_assignblk = {
expr_simp(dst): expr_simp(src)
for dst, src in assignblk.iteritems()
}
irs.append(AssignBlock(new_assignblk, instr=assignblk.instr))
ir_arch.blocks[irb.label] = IRBlock(irb.label, irs)
if verbose:
out = ir_arch.graph.dot()
open(os.path.join(tempfile.gettempdir(), 'graph.dot'), 'wb').write(out)
title = "Miasm IR graph"
if simplify:
dead_simp(ir_arch)
ir_arch.simplify(expr_simp)
modified = True
while modified:
modified = False
modified |= dead_simp(ir_arch)
modified |= ir_arch.remove_empty_assignblks()
modified |= ir_arch.remove_jmp_blocks()
modified |= ir_arch.merge_blocks()
title += " (simplified)"
g = GraphMiasmIR(ir_arch, title, None)
g.cmd_a = g.AddCommand("cmd a", "x")
g.cmd_b = g.AddCommand("cmd b", "y")
g.Show()
if __name__ == "__main__":
build_graph(verbose=True, simplify=False)
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