cea-sec/miasm

from __future__ import print_function
from miasm.expression.expression import *
from pdb import pm

print("""
Expression simplification demo.
(and regression test)
""")


a = ExprId('a', 32)
b = ExprId('b', 32)
c = ExprId('c', 32)
d = ExprId('d', 32)
e = ExprId('e', 32)

m = ExprMem(a, 32)
s = a[:8]

i1 = ExprInt(0x1, 32)
i2 = ExprInt(0x2, 32)
cc = ExprCond(a, b, c)

o = ExprCompose(a[8:16], a[:8])

o2 = ExprCompose(a[8:16], a[:8])

l = [a[:8], b[:8], c[:8], m[:8], s, i1[:8], i2[:8], o[:8]]
l2 = l[::-1]


x = ExprMem(a + b + ExprInt(0x42, 32), 32)


def replace_expr(e):
    dct = {c + ExprInt(0x42, 32): d,
           a + b: c, }
    if e in dct:
        return dct[e]
    return e


print(x)
y = x.visit(replace_expr)
print(y)
print(x.copy())
print(y.copy())
print(y == y.copy())
print(repr(y), repr(y.copy()))


z = ExprCompose(a[5:5 + 8], b[:16], x[:8])
print(z)
print(z.copy())
print(z[:31].copy().visit(replace_expr))

print('replace')
print(x.replace_expr({c + ExprInt(0x42, 32): d,
                      a + b: c, }))
print(z.replace_expr({c + ExprInt(0x42, 32): d,
                      a + b: c, }))


u = z.copy()
print(u)