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xous-core/kernel
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Sean Cross 426fe4b91f kernel: riscv: don't crash when mapping invalid memory 
Previously, the kernel would dutifully try to map memory that was in the
kernel space. It did this by investigating the kernel memory offset,
which immediately causes a double-fault.

Check to make sure a userspace process is not trying to map kernel
memory before checking the valid page.

Signed-off-by: Sean Cross <sean@xobs.io>
2022-06-30 19:45:08 +08:00
..
.vscode vscode: specify platform for vscode support 2021-08-06 17:51:47 +08:00
bin kernel: compatibility with riscv32imac-unknown-xous-elf 2021-08-18 18:14:24 +08:00
src kernel: riscv: don't crash when mapping invalid memory 2022-06-30 19:45:08 +08:00
assemble.ps1 kernel: compatibility with riscv32imac-unknown-xous-elf 2021-08-18 18:14:24 +08:00
assemble.sh Switch to using env to find the path to bash. 2022-03-28 16:43:47 -06:00
build.rs chore: fix ypo in build.rs 2022-05-26 17:53:33 +02:00
Cargo.toml remove custom ditherpunk flag from kernel 2022-06-16 03:39:25 +08:00
link.x kernel: compatibility with riscv32imac-unknown-xous-elf 2021-08-18 18:14:24 +08:00
README.md adding license info to README 2021-01-25 14:57:39 +01:00

README.md

Xous Kernel

This contains the core kernel for Xous. It requires a stage 1 loader in order to start up, as it assumes the system is already running in Supervisor mode.

Building

To build the kernel, you will need a riscv32 target for Rust. Possible targets include riscv32i-unknown-none-elf, riscv32imac-unknown-none-elf, or riscv32imac-unknown-xous-elf.

  1. Decide what target you want. For simple, embedded systems this could be riscv32i-unknown-none-elf, and for more complex systems with compressed instructions you could use riscv32imac-unknown-none-elf.
  2. Get Rust. Go to https://rustup.rs/ and follow its instructions.
  3. Install the proper toolchain: rustup target add ${target_arch}
  4. Build the kernel: cargo build --release --target ${target_arch}

Using

To use the kernel, you must package it up into an arguments binary with xous-tools.

Testing

TBD

Contribution Guidelines

Contributor Covenant

Please see CONTRIBUTING for details on how to make a contribution.

Please note that this project is released with a Contributor Code of Conduct. By participating in this project you agree to abide its terms.

License

Copyright © 2020

This project is licensed under the Apache License 2.0 LICENSE. For accurate information, please check individual files.