9f25a4e8f6
Don't store the bottom 12 bits of the base address for page table PTEs, because we know they are zero. This gives us implicit alignment to pageBits in the page table walker. The C code stores only 36 significant bits, whereas this commit still uses a full 64-bit machine word for the ppn in Haskell. To be adjusted in a future change. Signed-off-by: Gerwin Klein <gerwin.klein@proofcraft.systems> |
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| .. | ||
| include | ||
| src | ||
| .gitignore | ||
| Makefile | ||
| README.md | ||
| SEL4.cabal | ||
| Setup.hs | ||
| configure | ||
| mkhsboot.pl | ||
| stack-path | ||
| stack.yaml | ||
README.md
The seL4 Haskell Model
The sources in this directory can be used to build a Haskell Cabal package containing an executable model of the seL4 kernel. The model cannot run stand-alone; it must be integrated into a simulator that can run user-level binaries and generate events that the kernel model can process.
To build it:
- install the Haskell build tool stack.
- run
make
The Makefile will use stack to fetch appropriate versions of ghc and
cabal-install.
After that, you can compile Haskell programs using the simulator by adding
-package SEL4 to the ghc command line. Note that the qemu target requires
some callback functions to be accessible via the FFI, so it is not possible to
load a model compiled for those targets in GHCi.
Currently, the simulator interface is out of date, so this model is currently only useful as documentation and as intermediate artefact in the seL4 correctness proof. The model itself is kept up to date with the C code, only the simulator interface is outdated.