60 lines
No EOL
1.2 KiB
Markdown
60 lines
No EOL
1.2 KiB
Markdown
## Setup env
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On NixOS:
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- Ensure Linux Kernel is the same as you configuration.
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Otherwise, change linux_dev variable with you kernel variant and change flake.lock nixpkgs with your version.
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- Use direnv allow or nix develop to setup shell.
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On other distros:
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1. With Nix env, .envrc, change line by `use flake .#other`
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2. Without Nix env, you need to setup LINUX_MODULES_FOLDER to linux modules folder of your distro (ex: `/lib/modules/$(uname -r)`) in your shell (bashrc)
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## make : targets list
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- all : Compiling kernel
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- clean : Cleaning build folder
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All subfolder is configured to use LINUX_MODULES_FOLDER env variable set by flake develop
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## How test module
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Step 1: Load module
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```bash
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sudo insmod [module_name].ko
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```
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**Warning**: Can fail if secure boot is enabled
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Step 2: Check logs
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```bash
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sudo dmesg | tail
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```
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Step 3: Unload module
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```bash
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sudo rmmod [module_name].ko
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```
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## Usefull links
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- https://www.kernel.org/doc/html/latest/
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- https://elixir.bootlin.com/linux/v6.13/source/
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## Notes
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1. Find required headers files
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```
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nix shell nixpkgs#bear
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cd 01_basic_module/
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bear --append --output ../.vscode/compile_commands.json -- make -C $LINUX_MODULES_FOLDER/build M=$PWD modules
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```
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Search -I args and -D args |