/xv6-riscv

Xv6 for RISC-V

Primary LanguageCOtherNOASSERTION

XV6-RISCV

Original README

See Orignal README.

Notes

  1. Use compiledb or bear to generate compile_commands.json
  2. Add #pragma once macro to all header files 
    echo "#pragma once\n" > /tmp/head.txt
for file in $(find . -name "*.h"); do
    cat /tmp/head.txt $file > $file.modified
    mv $file.modified $file
done
  3. Add missing headers like types.h
  4. Use clang-format to format source codes 
    find . -name "*.[c|h]" -exec clang-format -i {} \;
  5. Configure launch.json and tasks.json for debugging
  6. Change CPUS in Makefile to 1 for debugging

Debug setup

Prerequisites:

  • install required toolchains referring to Orignal README
  • Change CPUS in Makefile to 1 for debugging

Terminal

  1. Run make qemu-gdb and you will see information belowed and .gdbinit created 
    *** Now run 'gdb' in another window.
qemu-system-riscv64 -machine virt -bios none -kernel kernel/kernel -m 128M -smp 3 -nographic -drive file=fs.img,if=none,format=raw,id=x0 -device virtio-blk-device,drive=x0,bus=virtio-mmio-bus.0 -S -gdb tcp::25000
  2. Open another terminal and run gdb-multiarch kernel/kernel

VSCode

  1. Run make qemu-gdb and get .gdbinit file in current directory
  2. Configure launch.json and tasks.json in .vscode
    • You can refer these two files in this repo
    • Replace miDebuggerServerAddress item with the specific value in .gdbinit generated in the last step
  3. Click F5 and comment target remote 127.0.0.1:<port> with @REM remote 127.0.0.1:<port>

Recommended courses

  1. NJU OS 2022 - learning šŸ„³
  2. 6.S081 Fall 2021