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macaw/symbolic/ChangeLog.md

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AArch32: Support conditional returns (#243) Adds support in macaw-aarch32 for conditional returns. These are not supported in core macaw, and are thus architecture-specific block terminators. This required changes to the type of arch-specific block terminators. Before, `ArchTermStmt` was only parameterized by a state thread (`ids`). This meant that they could not contain macaw (or crucible) values. Some work on. AArch32 requires being able to store condition values in arch terminators (to support conditional returns). This change modifies the `ArchTermStmt` to enable this, which requires a bit of plumbing through various definitions and some extra instances. In support of actually using this, it also became necessary to plumb fallthrough block labels through the architecture-specific terminator translation in macaw-symbolic. Note that this change was overdue, as the PowerPC backend was storing macaw values in a way that would have rendered them unusable in the macaw-ppc-symbolic translation, had any interpretation been provided. These new changes will enable a handler to be written for the conditional PowerPC trap instructions. PowerPC, x86, and ARM have been updated. Improves the macaw-aarch32 tests. There is now a command line option to save the generated macaw IR for each discovered function to /tmp. Note that this reuses some infrastructure from the macaw-symbolic tests. This shared functionality should be extracted into a macaw-testing library.
2021-11-20 03:20:50 +03:00
# Revision history for macaw-symbolic
## Next
### Features
### API Changes
- The type of `crucGenArchTermStmt` has changed
It gained a parameter of type `Maybe (Label c)` where `Label` comes from Crucible. This enables architecture-specific terminators to add custom control flow, including fallthrough behavior.
- `Data.Macaw.Symbolic.Backend` now exports some additional combinators
These enable some more sophisticated translations in architecture-specific backends.
- `appAtom`
- `addTermStmt`
- `createRegStruct`
- `setMachineRegs`
- `addExtraBlock`
- `freshValueIndex`
Update crucible, semmc submodules; adapt to GaloisInc/crucible#906 This updates the `crucible` submodule to include GaloisInc/crucible#906 (`Control granularity of reading uninitialized memory`), as well as the `semmc` submodule to bring in corresponding changes on its side (GaloisInc/semmc#69). Some additional `?memOpts :: MemOptions` constraints needed to be added to some functions in `macaw-symbolic` and `macaw-refinement` as a result.
2021-11-23 00:41:28 +03:00
- `Data.Macaw.Symbolic.Memory.newGlobalMemory` now has a `?memOpts :: MemOptions` constraint.
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