example: add expression manipulation demo

1 files changed, 27 insertions, 0 deletions

diff --git a/example/expression/manip_expression2.py b/example/expression/manip_expression2.py
new file mode 100644
index 00000000..cbdd8f9d
--- /dev/null
+++ b/example/expression/manip_expression2.py
@@ -0,0 +1,27 @@
+from miasm.arch.ia32_sem import *
+
+print 'simple expression use demo: get read/written stuff for instruction:'
+print 'add eax, [ebx]'
+print
+
+def get_rw(exprs):
+    o_r = set()
+    o_w = set()
+    for e in exprs:
+        o_r.update(e.get_r(mem_read=True))
+    for e in exprs:
+        o_w.update(e.get_w())
+    return o_r, o_w
+
+a = ExprId('eax')
+b = ExprMem(ExprId('ebx'), 32)
+
+exprs = add(('u32', 'u32'), a, b)
+o_r, o_w = get_rw(exprs)
+# read ID
+print 'r:', [str(x) for x in o_r]
+# ['eax', '@32[ebx]', 'ebx']
+
+# written ID
+print 'w:', [str(x) for x in o_w]
+# ['eax', 'pf', 'af', 'of', 'zf', 'cf', 'nf']