Update to API changes in macaw-base in macaw-ppc and macaw-arm
The "block label" abstraction (used during arch-specific disassembly) was removed some time ago in the base macaw library. This change updates macaw-ppc and macaw-arm to remove uses of block labels. The major change is that the disassembly function only returns a single block at a time instead of a sequence of blocks.
To facilitate this, the handling of the PowerPC conditional trap instruction (trap doubleword) is now an architecture-specific terminator instruction instead of encoding the logic of conditional trapping. We will now have to encode the conditional trapping logic in macaw-ppc-symbolic. Note that we have not done so yet.
This commit also updates the expected results of the PowerPC tests; the number of discovered blocks is different, but not significantly so. It is hard to tell if this is a regression or an improvement.
Verifies that the number of blocks found matches what should generally
be expected from this particular executable.
The specific value checked for is not independently verified, it just
happens to be a reasonable-looking value that the discovery process
currently identifies, and encoding it here ensures that if discovery
ever changes that the change will be seen and explicitly accepted or
fixed as needed.
The TOC parser now doesn't require a Memory object, making it easier to actually
instantiate this in derived tools (where the TOC parser needs to be used before
a memory is available). To do this, we use MemAddr as the base type for the TOC
instead of MemSegmentOff
The code pointer discovery in macaw can't handle this case because we never
write the code pointers into memory - we only read them. We really need a way
to tell macaw about code pointers.
The easy workaround is to pull all of the function entry points out of the TOC
and just seed the macaw search with them, but it would be nice to be able to
identify them from first principles.
It runs code discovery over a large-ish binary to test coverage. We currently
fail due to unsupported instructions (expected). This test will guide
priorities on implementing new semantics.
