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All Projects → Luis-Hebendanz → Svm_kernel

Luis-Hebendanz / Svm_kernel

Licence: gpl-3.0
x86_64 AMD kernel optimized for performance & hypervisor usage

Programming Languages

rust
11053 projects

Labels

kernelx86-64hpcsvmhypervisor

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==== WORK IN PROGRESS ====

Working grub bootloader, currently implementing mode switch to long mode

Description

x86_64 HPC AMD kernel written in Rust. Optimized for hypervisor usage.

Setup & Debug Build

Clone the repo with submodules:

$ git clone --recursive <url>

Pinned rustc version is found in rust-toolchain

Install the dependencies listed in shell.nix or execute nix-shell shell.nix if on NixOS.

Install cargo dependencies:

$ cargo install -p svm_kernel/bootimage
$ rustup component add llvm-tools-preview

Run in qemu with:

$ cargo run

Close the instance with CTRL+A,X or CTRL+C

Build on filechange:

$ cd svm_kernel
$ cargo watch

Release build:

Execute:

$ cargo run --release

The resulting file lies in: target/x86_64-os/release/bootimage-svm_kernel.bin Flash it with:

$ dd bs=5M if=target/x86_64-os/release/bootimage-svm_kernel.iso of=/dev/MYDEVICE

OR Edit the file Cargo.toml and change build-command to ["build", "--release"] Then execute cargo bootimage --grub

Generate & view assembly

$ cargo asm

You can find the asm file in target/x86_64-os/release/deps/svm_kernel-*.s

Debug with gdb

$ qemu-kvm -cpu qemu64,+svm,vendor=AuthenticAMD -drive format=raw,file=target/x86_64-os/debug/bootimage-svm_kernel.bin -nographic -s -S

In another shell execute:

$ gdb target/x86_64-os/debug/svm_kernel.d -ex "target remote:1234"

You have to use hb instead of b in gdb when using qemu-kvm. If not the breakpoints get ignored. Note: svm_kernel.d are the extracted symbols from the svm_kernel binary.

If you want to debug other cores you have to use qemu in emulation mode and not in kvm mode! If qemu is in emulation mode gdb sees other cores as threads thus settings breakpoints has to be done as follows: List all cores and its IDs:

(gdb) thread

Set breakpoint

(gdb) break <location> thread <thread-id>

Debug with radare2

$ r2 -B [TODO] target/x86_64-os/debug/svm_kernel

Look into svm_kernel/external/bootloader/linker.ld to find the offset where the kernel gets mapped to.

Run tests

To execute tests run:

$ cargo test

Run specific test:

$ cargo test --test heap_allocator

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