example: add symbolic execution and simplification

1 files changed, 38 insertions, 0 deletions

diff --git a/example/expression/symbolic_exec.py b/example/expression/symbolic_exec.py
new file mode 100644
index 00000000..40e9dc07
--- /dev/null
+++ b/example/expression/symbolic_exec.py
@@ -0,0 +1,38 @@
+import sys
+from miasm.arch.ia32_arch import *
+from miasm.tools.emul_helper import *
+from miasm.core.bin_stream import bin_stream
+
+print "symbolic execution & simplification demo"
+
+def loop_emul(ad, machine, all_bloc):
+    ad = ExprInt(uint32(ad))
+    while isinstance(ad, ExprInt):
+        b = asmbloc.getblocby_offset(all_bloc, ad.arg)
+        if not b:
+            raise ValueError('unknown bloc', repr(ad))
+        print '*'*20, 'emul bloc:', '*'*20
+        print b
+        ad = emul_bloc(machine, b)
+    return ad
+
+if len(sys.argv) != 2:
+    print "%s obf.bin"%sys.argv[0]
+    sys.exit(-1)
+
+data = open(sys.argv[1]).read()
+in_str = bin_stream(data)
+
+symbol_pool = asmbloc.asm_symbol_pool()
+ad = 0
+
+all_bloc = asmbloc.dis_bloc_all(x86_mn, in_str, ad, set(), symbol_pool, dontdis_retcall = True)
+
+machine = x86_machine()
+ad = loop_emul(ad, machine, all_bloc)
+print
+print "emulation result:"
+print dump_reg(machine.pool)
+print "eip", ad
+print
+print dump_mem(machine.pool)