This adds RzIL lifting for all legal 6502 ops, except the special bcd
modes of adc and sbc for now. The lifting of every one of these ops is
covered by an asm test, making sure all IL is valid. Some manual
execution tests are available too, including one that runs a simple
real-world xor-"decryption" loop.
The lifting has not been tested against traces yet, so minor mistakes in
the semantics are currently expected.
There are now three kinds of vars: global, local and local pure. Global
and local pure are exactly like in BAP, local ones are defined by their
initial set op and have the scope of a single lifted instruction.
The set op now handles both global and local vars, let is now pure and
binds only inside its body. Vars have static types, global and local are
always mutable, local pure naturally immutable.
The var op specifies the kind of variable to take from, and the
individual variable sets are separate. This corresponds to BAP's
behavior where the kind of variable is part of the identifier.
Variable content storage has also been rewritten and RzILBag removed.
The new intermediate language is based on the BAP (Binary Analysis Platform) Core Theory.
It operates on SMT-like bitvectors and their arrays to represent values and memory.
Apart from that, it has also representation for the data and code side effects.
