mirror of
https://github.com/cea-sec/miasm
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Ajax
459 lines
16 KiB
Python
459 lines
16 KiB
Python
#
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# Expression simplification regression tests #
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#
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from pdb import pm
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from miasm2.expression.expression import *
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from miasm2.expression.expression_helper import expr_cmpu, expr_cmps
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from miasm2.expression.simplifications import expr_simp, ExpressionSimplifier
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from miasm2.expression.simplifications_cond import ExprOp_inf_signed, ExprOp_inf_unsigned, ExprOp_equal
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# Define example objects
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a = ExprId('a')
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b = ExprId('b')
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c = ExprId('c')
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d = ExprId('d')
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e = ExprId('e')
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f = ExprId('f', size=64)
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m = ExprMem(a)
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s = a[:8]
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i0 = ExprInt(0, 32)
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i1 = ExprInt(1, 32)
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i2 = ExprInt(2, 32)
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icustom = ExprInt(0x12345678, 32)
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cc = ExprCond(a, b, c)
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o = ExprCompose(a[8:16], a[:8])
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o2 = ExprCompose(a[8:16], a[:8])
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l = [a[:8], b[:8], c[:8], m[:8], s, i1[:8], i2[:8], o[:8]]
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l2 = l[::-1]
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x = ExprMem(a + b + ExprInt(0x42, 32))
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# Define tests: (expression to simplify, expected value)
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to_test = [(ExprInt(1, 32) - ExprInt(1, 32), ExprInt(0, 32)),
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((ExprInt(5, 32) + c + a + b - a + ExprInt(1, 32) - ExprInt(5, 32)),
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ExprOp('+', b, c, ExprInt(1, 32))),
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(a + b + c - a - b - c + a, a),
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(a + a + b + c - (a + (b + c)), a),
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(c ^ b ^ a ^ c ^ b, a),
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(a ^ ExprInt(0, 32), a),
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((a + b) - b, a),
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(-(ExprInt(0, 32) - ((a + b) - b)), a),
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(ExprOp('<<<', a, ExprInt(32, 32)), a),
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(ExprOp('>>>', a, ExprInt(32, 32)), a),
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(ExprOp('>>>', a, ExprInt(0, 32)), a),
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(ExprOp('<<', a, ExprInt(0, 32)), a),
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(ExprOp('<<<', a, ExprOp('<<<', b, c)),
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ExprOp('<<<', a, ExprOp('<<<', b, c))),
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(ExprOp('<<<', ExprOp('<<<', a, b), c),
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ExprOp('<<<', a, (b+c))),
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(ExprOp('<<<', ExprOp('>>>', a, b), c),
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ExprOp('>>>', a, (b-c))),
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(ExprOp('>>>', ExprOp('<<<', a, b), c),
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ExprOp('<<<', a, (b-c))),
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(ExprOp('>>>', ExprOp('<<<', a, b), b),
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a),
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(ExprOp(">>>", ExprInt(0x1000, 16), ExprInt(0x11, 16)),
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ExprInt(0x800, 16)),
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(ExprOp("<<<", ExprInt(0x1000, 16), ExprInt(0x11, 16)),
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ExprInt(0x2000, 16)),
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(ExprOp('>>>', ExprOp('<<<', a, ExprInt(10, 32)), ExprInt(2, 32)),
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ExprOp('<<<', a, ExprInt(8, 32))),
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(ExprOp('>>>', ExprOp('<<<', a, ExprInt(10, 32)), ExprInt(2, 32)) ^ ExprOp('>>>', ExprOp('<<<', a, ExprInt(10, 32)), ExprInt(2, 32)),
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ExprInt(0, 32)),
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(ExprOp(">>", (a & ExprInt(0xF, 32)), ExprInt(0x15, 32)),
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ExprInt(0, 32)),
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(ExprOp(">>", (ExprInt(0x12345678, 32)), ExprInt(0x4, 32)),
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ExprInt(0x1234567, 32)),
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(ExprOp("a>>", (ExprInt(0x12345678, 32)), ExprInt(0x4, 32)),
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ExprInt(0x1234567, 32)),
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(ExprOp("a>>", (ExprInt(0xF1234567, 32)), ExprInt(0x4, 32)),
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ExprInt(0xFF123456, 32)),
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(ExprOp("a>>", (ExprInt(0xF1234567, 32)), ExprInt(28, 32)),
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ExprInt(0xFFFFFFFF, 32)),
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(ExprOp("parity", ExprInt(0xf, 32)), ExprInt(1, 1)),
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(ExprOp("parity", ExprInt(0xe, 32)), ExprInt(0, 1)),
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(ExprInt(0x4142, 32)[:32], ExprInt(0x4142, 32)),
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(ExprInt(0x4142, 32)[:8], ExprInt(0x42, 8)),
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(ExprInt(0x4142, 32)[8:16], ExprInt(0x41, 8)),
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(a[:32], a),
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(a[:8][:8], a[:8]),
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(a[:16][:8], a[:8]),
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(a[8:16][:8], a[8:16]),
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(a[8:32][:8], a[8:16]),
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(a[:16][8:16], a[8:16]),
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(ExprCompose(a), a),
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(ExprCompose(a[:16]), a[:16]),
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(ExprCompose(a[:16], a[:16]),
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ExprCompose(a[:16], a[:16]),),
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(ExprCompose(a[:16], a[16:32]), a),
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(ExprMem(a)[:32], ExprMem(a)),
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(ExprMem(a)[:16], ExprMem(a, size=16)),
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(ExprCond(ExprInt(1, 32), a, b), a),
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(ExprCond(ExprInt(0, 32), b, a), a),
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(ExprInt(0x80000000, 32)[31:32], ExprInt(1, 1)),
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(ExprCompose(ExprInt(0x1337, 16)[:8], ExprInt(0x1337, 16)[8:16]),
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ExprInt(0x1337, 16)),
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(ExprCompose(ExprInt(0x1337beef, 32)[:8],
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ExprInt(0x1337beef, 32)[8:16],
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ExprInt(0x1337beef, 32)[16:32]),
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ExprInt(0x1337BEEF, 32)),
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(ExprCond(a,
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ExprCond(a,
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b,
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c),
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d), ExprCond(a, b, d)),
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((a & b & ExprInt(0x12, 32))[31:32], ExprInt(0, 1)),
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(ExprCompose(
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ExprCond(a, ExprInt(0x10, 16), ExprInt(0x20, 16)),
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ExprInt(0x1337, 16)),
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ExprCond(a, ExprInt(0x13370010, 32), ExprInt(0x13370020, 32))),
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(ExprCond(ExprCond(a, ExprInt(0, 1), ExprInt(1, 1)), b, c),
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ExprCond(a, c, b)),
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(ExprCond(a, ExprInt(0x10, 32), ExprInt(0x20, 32)) + ExprInt(0x13370000, 32),
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ExprCond(a, ExprInt(0x13370010, 32), ExprInt(0x13370020, 32))),
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(ExprCond(a, ExprInt(0x10, 32), ExprInt(0x20, 32)) + ExprCond(a, ExprInt(0x13370000, 32), ExprInt(0x13380000, 32)),
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ExprCond(a, ExprInt(0x13370010, 32), ExprInt(0x13380020, 32))),
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(-ExprCond(a, ExprInt(0x1, 32), ExprInt(0x2, 32)),
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ExprCond(a, ExprInt(-0x1, 32), ExprInt(-0x2, 32))),
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(ExprOp('*', a, b, c, ExprInt(0x12, 32))[0:17],
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ExprOp(
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'*', a[0:17], b[0:17], c[0:17], ExprInt(0x12, 17))),
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(ExprOp('*', a, ExprInt(0xffffffff, 32)),
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-a),
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(ExprOp('*', -a, -b, c, ExprInt(0x12, 32)),
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ExprOp('*', a, b, c, ExprInt(0x12, 32))),
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(ExprOp('*', -a, -b, -c, ExprInt(0x12, 32)),
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- ExprOp('*', a, b, c, ExprInt(0x12, 32))),
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(ExprOp('**', ExprInt(2, 32), ExprInt(8, 32)), ExprInt(0x100, 32)),
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(ExprInt(2, 32)**ExprInt(8, 32), ExprInt(256, 32)),
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(a | ExprInt(0xffffffff, 32),
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ExprInt(0xffffffff, 32)),
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(ExprCond(a, ExprInt(1, 32), ExprInt(2, 32)) * ExprInt(4, 32),
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ExprCond(a, ExprInt(4, 32), ExprInt(8, 32))),
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(ExprCond(a, b, c) + ExprCond(a, d, e),
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ExprCond(a, b + d, c + e)),
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(ExprCond(a, b, c) * ExprCond(a, d, e),
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ExprCond(a, b * d, c * e)),
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(ExprCond(a, ExprInt(8, 32), ExprInt(4, 32)) >> ExprInt(1, 32),
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ExprCond(a, ExprInt(4, 32), ExprInt(2, 32))),
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(ExprCond(a, b, c) >> ExprCond(a, d, e),
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ExprCond(a, b >> d, c >> e)),
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(a & b & ExprInt(-1, a.size), a & b),
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(a | b | ExprInt(-1, a.size),
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ExprInt(-1, a.size)),
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(ExprOp('-', ExprInt(1, 8), ExprInt(0, 8)),
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ExprInt(1, 8)),
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(ExprCompose(a, ExprInt(0, 32)) << ExprInt(0x20, 64),
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ExprCompose(ExprInt(0, 32), a)),
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(ExprCompose(a, ExprInt(0, 32)) << ExprInt(0x10, 64),
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ExprCompose(ExprInt(0, 16), a, ExprInt(0, 16))),
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(ExprCompose(a, ExprInt(0, 32)) << ExprInt(0x30, 64),
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ExprCompose(ExprInt(0, 48), a[:0x10])),
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(ExprCompose(a, ExprInt(0, 32)) << ExprInt(0x11, 64),
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ExprCompose(ExprInt(0, 0x11), a, ExprInt(0, 0xF))),
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(ExprCompose(a, ExprInt(0, 32)) << ExprInt(0x40, 64),
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ExprInt(0, 64)),
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(ExprCompose(a, ExprInt(0, 32)) << ExprInt(0x50, 64),
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ExprInt(0, 64)),
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(ExprCompose(ExprInt(0, 32), a) >> ExprInt(0x20, 64),
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ExprCompose(a, ExprInt(0, 32))),
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(ExprCompose(ExprInt(0, 32), a) >> ExprInt(0x10, 64),
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ExprCompose(ExprInt(0, 16), a, ExprInt(0, 16))),
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(ExprCompose(ExprInt(0, 32), a) >> ExprInt(0x30, 64),
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ExprCompose(a[0x10:], ExprInt(0, 48))),
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(ExprCompose(ExprInt(0, 32), a) >> ExprInt(0x11, 64),
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ExprCompose(ExprInt(0, 0xf), a, ExprInt(0, 0x11))),
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(ExprCompose(ExprInt(0, 32), a) >> ExprInt(0x40, 64),
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ExprInt(0, 64)),
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(ExprCompose(ExprInt(0, 32), a) >> ExprInt(0x50, 64),
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ExprInt(0, 64)),
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(ExprCompose(a, b) << ExprInt(0x20, 64),
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ExprCompose(ExprInt(0, 32), a)),
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(ExprCompose(a, b) << ExprInt(0x10, 64),
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ExprCompose(ExprInt(0, 16), a, b[:16])),
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(ExprCompose(a, b) | ExprCompose(c, d),
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ExprCompose(a|c, b|d)),
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(ExprCompose(a, ExprInt(0, 32)) | ExprCompose(ExprInt(0, 32), d),
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ExprCompose(a, d)),
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(ExprCompose(f[:32], ExprInt(0, 32)) | ExprCompose(ExprInt(0, 32), f[32:]),
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f),
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((ExprCompose(a, ExprInt(0, 32)) * ExprInt(0x123, 64))[32:64],
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(ExprCompose(a, ExprInt(0, 32)) * ExprInt(0x123, 64))[32:64]),
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(ExprInt(0x12, 32),
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ExprInt(0x12L, 32)),
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(ExprCompose(a, b, c)[:16],
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a[:16]),
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(ExprCompose(a, b, c)[16:32],
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a[16:]),
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(ExprCompose(a, b, c)[32:48],
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b[:16]),
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(ExprCompose(a, b, c)[48:64],
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b[16:]),
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(ExprCompose(a, b, c)[64:80],
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c[:16]),
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(ExprCompose(a, b, c)[80:],
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c[16:]),
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(ExprCompose(a, b, c)[80:82],
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c[16:18]),
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(ExprCompose(a, b, c)[16:48],
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ExprCompose(a[16:], b[:16])),
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(ExprCompose(a, b, c)[48:80],
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ExprCompose(b[16:], c[:16])),
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(ExprCompose(a[0:8], b[8:16], ExprInt(0x0L, 48))[12:32],
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ExprCompose(b[12:16], ExprInt(0, 16))
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),
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(ExprCompose(ExprCompose(a[:8], ExprInt(0x0L, 56))[8:32]
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&
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ExprInt(0x1L, 24),
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ExprInt(0x0L, 40)),
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ExprInt(0, 64)),
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(ExprCompose(ExprCompose(a[:8], ExprInt(0x0L, 56))[:8]
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&
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ExprInt(0x1L, 8),
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(ExprInt(0x0L, 56))),
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ExprCompose(a[:8]&ExprInt(1, 8), ExprInt(0, 56))),
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(ExprCompose(ExprCompose(a[:8],
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ExprInt(0x0L, 56))[:32]
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&
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ExprInt(0x1L, 32),
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ExprInt(0x0L, 32)),
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ExprCompose(ExprCompose(ExprSlice(a, 0, 8),
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ExprInt(0x0L, 24))
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&
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ExprInt(0x1L, 32),
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ExprInt(0x0L, 32))
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),
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(ExprCompose(a[:16], b[:16])[8:32],
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ExprCompose(a[8:16], b[:16])),
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((a >> ExprInt(16, 32))[:16],
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a[16:32]),
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((a >> ExprInt(16, 32))[8:16],
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a[24:32]),
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((a << ExprInt(16, 32))[16:32],
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a[:16]),
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((a << ExprInt(16, 32))[24:32],
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a[8:16]),
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(expr_cmpu(ExprInt(0, 32), ExprInt(0, 32)),
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ExprInt(0, 1)),
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(expr_cmpu(ExprInt(10, 32), ExprInt(0, 32)),
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ExprInt(1, 1)),
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(expr_cmpu(ExprInt(10, 32), ExprInt(5, 32)),
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ExprInt(1, 1)),
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(expr_cmpu(ExprInt(5, 32), ExprInt(10, 32)),
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ExprInt(0, 1)),
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(expr_cmpu(ExprInt(-1, 32), ExprInt(0, 32)),
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ExprInt(1, 1)),
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(expr_cmpu(ExprInt(-1, 32), ExprInt(-1, 32)),
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ExprInt(0, 1)),
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(expr_cmpu(ExprInt(0, 32), ExprInt(-1, 32)),
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ExprInt(0, 1)),
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(expr_cmps(ExprInt(0, 32), ExprInt(0, 32)),
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ExprInt(0, 1)),
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(expr_cmps(ExprInt(10, 32), ExprInt(0, 32)),
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ExprInt(1, 1)),
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(expr_cmps(ExprInt(10, 32), ExprInt(5, 32)),
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ExprInt(1, 1)),
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(expr_cmps(ExprInt(5, 32), ExprInt(10, 32)),
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ExprInt(0, 1)),
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(expr_cmps(ExprInt(-1, 32), ExprInt(0, 32)),
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ExprInt(0, 1)),
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(expr_cmps(ExprInt(-1, 32), ExprInt(-1, 32)),
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ExprInt(0, 1)),
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(expr_cmps(ExprInt(0, 32), ExprInt(-1, 32)),
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ExprInt(1, 1)),
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(expr_cmps(ExprInt(-5, 32), ExprInt(-10, 32)),
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ExprInt(1, 1)),
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(expr_cmps(ExprInt(-10, 32), ExprInt(-5, 32)),
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ExprInt(0, 1)),
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(ExprOp("<<<c_rez", i1, i0, i0),
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i1),
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(ExprOp("<<<c_rez", i1, i1, i0),
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ExprInt(2, 32)),
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(ExprOp("<<<c_rez", i1, i1, i1),
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ExprInt(3, 32)),
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(ExprOp(">>>c_rez", icustom, i0, i0),
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icustom),
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(ExprOp(">>>c_rez", icustom, i1, i0),
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ExprInt(0x91A2B3C, 32)),
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(ExprOp(">>>c_rez", icustom, i1, i1),
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ExprInt(0x891A2B3C, 32)),
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(ExprOp("idiv", ExprInt(0x0123, 16), ExprInt(0xfffb, 16))[:8],
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ExprInt(0xc6, 8)),
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(ExprOp("imod", ExprInt(0x0123, 16), ExprInt(0xfffb, 16))[:8],
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ExprInt(0x01, 8)),
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(ExprCompose(ExprInt(0x0123, 16), ExprMem(a + ExprInt(0x40, a.size), 16),
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ExprMem(a + ExprInt(0x42, a.size), 16), ExprInt(0x0321, 16)),
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ExprCompose(ExprInt(0x0123, 16), ExprMem(a + ExprInt(0x40, a.size), 32),
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ExprInt(0x0321, 16))),
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]
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for e, e_check in to_test[:]:
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#
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print "#" * 80
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# print str(e), str(e_check)
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e_new = expr_simp(e)
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print "original: ", str(e), "new: ", str(e_new)
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rez = e_new == e_check
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if not rez:
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raise ValueError(
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'bug in expr_simp simp(%s) is %s and should be %s' % (e, e_new, e_check))
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# Test conds
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to_test = [
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(((a - b) ^ ((a ^ b) & ((a - b) ^ a))).msb(),
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ExprOp_inf_signed(a, b)),
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((((a - b) ^ ((a ^ b) & ((a - b) ^ a))) ^ a ^ b).msb(),
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ExprOp_inf_unsigned(a, b)),
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(ExprOp_inf_unsigned(ExprInt(-1, 32), ExprInt(3, 32)), ExprInt(0, 1)),
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(ExprOp_inf_signed(ExprInt(-1, 32), ExprInt(3, 32)), ExprInt(1, 1)),
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(ExprOp_inf_unsigned(a, b) ^ (a ^ b).msb(), ExprOp_inf_signed(a, b)),
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(ExprOp_inf_signed(a, b) ^ (a ^ b).msb(), ExprOp_inf_unsigned(a, b)),
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(ExprOp_equal(ExprInt(12, 32), ExprInt(10, 32)), ExprInt(0, 1)),
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(ExprOp_equal(ExprInt(12, 32), ExprInt(12, 32)), ExprInt(1, 1)),
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(ExprOp_equal(ExprInt(12, 32), ExprInt(-12, 32)), ExprInt(0, 1)),
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(ExprCond(a - b, ExprInt(0, 1), ExprInt(1, 1)), ExprOp_equal(a, b)),
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(ExprCond(a + b, ExprInt(0, 1), ExprInt(1, 1)), ExprOp_equal(a, -b)),
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(ExprOp_inf_signed(ExprInt(-2, 32), ExprInt(3, 32)), ExprInt(1, 1)),
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(ExprOp_inf_signed(ExprInt(3, 32), ExprInt(-3, 32)), ExprInt(0, 1)),
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(ExprOp_inf_signed(ExprInt(2, 32), ExprInt(3, 32)), ExprInt(1, 1)),
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(ExprOp_inf_signed(ExprInt(-3, 32), ExprInt(-2, 32)), ExprInt(1, 1)),
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(ExprOp_inf_signed(ExprInt(0, 32), ExprInt(2, 32)), ExprInt(1, 1)),
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(ExprOp_inf_signed(ExprInt(-3, 32), ExprInt(0, 32)), ExprInt(1, 1)),
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]
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expr_simp_cond = ExpressionSimplifier()
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expr_simp.enable_passes(ExpressionSimplifier.PASS_COND)
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for e, e_check in to_test[:]:
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#
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print "#" * 80
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e_check = expr_simp(e_check)
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# print str(e), str(e_check)
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e_new = expr_simp(e)
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|
print "original: ", str(e), "new: ", str(e_new)
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|
rez = e_new == e_check
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if not rez:
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raise ValueError(
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'bug in expr_simp simp(%s) is %s and should be %s' % (e, e_new, e_check))
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|
|
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|
|
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x = ExprId('x')
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|
y = ExprId('y')
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|
z = ExprId('z')
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|
a = ExprId('a')
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|
b = ExprId('b')
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|
c = ExprId('c')
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|
|
|
|
|
jra = ExprId('jra')
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|
jrb = ExprId('jrb')
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|
jrint1 = ExprId('jrint1')
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|
|
|
|
|
e1 = ExprMem((a & ExprInt(0xFFFFFFFC, 32)) + ExprInt(0x10, 32), 32)
|
|
e2 = ExprMem((a & ExprInt(0xFFFFFFFC, 32)) + b, 32)
|
|
e3 = (a ^ b ^ ((a ^ b) & (b ^ (b - a))) ^ (b - a)).canonize()
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|
|
|
match_tests = [
|
|
(match_expr(ExprInt(12, 32), a, [a]), {a: ExprInt(12, 32)}),
|
|
(match_expr(x, a, [a]), {a: x}),
|
|
(match_expr(x + y, a, [a]), {a: x + y}),
|
|
(match_expr(x + y, a + y, [a]), {a: x}),
|
|
(match_expr(x + y, x + a, [a]), {a: y}),
|
|
(match_expr(x + y, a + b, [a, b]), {a: x, b: y}),
|
|
(match_expr(x + ExprInt(12, 32), a + b, [a, b]), {a: x, b: ExprInt(12, 32)}),
|
|
(match_expr(ExprMem(x), a, [a]), {a: ExprMem(x)}),
|
|
(match_expr(ExprMem(x), ExprMem(a), [a]), {a: x}),
|
|
(match_expr(x[0:8], a, [a]), {a: x[0:8]}),
|
|
(match_expr(x[0:8], a[0:8], [a]), {a: x}),
|
|
(match_expr(ExprCond(x, y, z), a, [a]), {a: ExprCond(x, y, z)}),
|
|
(match_expr(ExprCond(x, y, z),
|
|
ExprCond(a, b, c), [a, b, c]),
|
|
{a: x, b: y, c: z}),
|
|
(match_expr(ExprCompose(x[:8], y[:8]), a, [a]),
|
|
{a: ExprCompose(x[:8], y[:8])}),
|
|
(match_expr(ExprCompose(x[:8], y[:8]),
|
|
ExprCompose(a[:8], b[:8]), [a, b]),
|
|
{a: x, b: y}),
|
|
(match_expr(e1, e2, [b]), {b: ExprInt(0x10, 32)}),
|
|
(match_expr(e3,
|
|
(((jra ^ jrb) & (jrb ^ jrint1))
|
|
^ jra ^ jrb ^ jrint1).canonize(),
|
|
[jra, jrb, jrint1]),
|
|
{jra: a, jrb: b, jrint1: b - a}),
|
|
]
|
|
|
|
for test, res in match_tests:
|
|
assert(test == res)
|
|
|
|
|
|
get_tests = [
|
|
(ExprAff(ExprMem(a), ExprMem(b)).get_r(True), set([a, b, ExprMem(b)])),
|
|
(ExprAff(ExprMem(a), ExprMem(b)).get_w(), set([ExprMem(a)])),
|
|
(ExprAff(ExprMem(ExprMem(a)), ExprMem(b))
|
|
.get_r(True), set([a, b, ExprMem(b), ExprMem(a)])),
|
|
]
|
|
|
|
|
|
for test, res in get_tests:
|
|
assert(test == res)
|
|
|
|
|
|
to_test = [(a + b, b + a),
|
|
(a + m, m + a),
|
|
((a[:8] + s), (s + a[:8])),
|
|
((m[:8] + s), (s + m[:8])),
|
|
((i1 + i2), (i2 + i1)),
|
|
((a + i2), (i2 + a)),
|
|
((m + i2), (i2 + m)),
|
|
((s + i2[:8]), (i2[:8] + s)),
|
|
(o, o2),
|
|
(ExprOp('+', *l), ExprOp('+', *l2)),
|
|
]
|
|
|
|
for x, y in to_test:
|
|
x, y = x.canonize(), y.canonize()
|
|
|
|
assert(x == y)
|
|
assert(str(x) == str(y))
|
|
print x
|
|
|
|
print 'all tests ok'
|