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6fa81c234a
Bit 7 on various descriptors in x86_64 can take on varying values depending upon the descriptor type. Refelect that in the implementation and fix a bug whereby the PAT bit would have been set when creating a PTE.
libkernel
Architecture-independent kernel building blocks for operating systems.
libkernel provides the core abstractions that a kernel needs to manage memory,
processes, filesystems, and synchronisation, agnostic of the an underlying CPU
architecture. It is designed to run in a no_std environment and uses feature
gates to keep the dependency footprint minimal.
Feature gates
| Feature | Enables | Implies |
|---|---|---|
sync |
Synchronisation primitives (spinlock, mutex, rwlock…) | — |
alloc |
Memory allocators (buddy, slab) and collection types | sync |
paging |
Page tables, PTE helpers | alloc |
proc |
Process identity types (UID/GID, capabilities) | — |
fs |
VFS traits, path manipulation, block I/O | proc, sync |
proc_vm |
Process virtual-memory management (mmap, brk, CoW) | paging, fs |
kbuf |
Async-aware circular kernel buffers | sync |
all |
Everything above | all of the above |
Quick start
Add libkernel to your Cargo.toml with only the features you need:
[dependencies]
libkernel = { version = "0.1", features = ["sync", "proc"] }
The CpuOps trait
Most synchronisation and memory primitives are generic over a
CpuOps
implementation. This trait abstracts the handful of arch-specific operations
(core ID, interrupt masking, halt) that the portable code depends on.
License
Licensed under the MIT license. See LICENSE for details.