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| author | Baitinq <manuelpalenzuelamerino@gmail.com> | 2022-10-07 01:37:59 +0200 |
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| committer | Baitinq <manuelpalenzuelamerino@gmail.com> | 2022-10-07 11:37:52 +0200 |
| commit | be39a0bd06ba0dabab691ef6da6db4162cce1d0c (patch) | |
| tree | 2c88a5a1f1d37a87899e04a78118aa13e88bda63 /README.md | |
| download | linux-development-workflow-be39a0bd06ba0dabab691ef6da6db4162cce1d0c.tar.gz linux-development-workflow-be39a0bd06ba0dabab691ef6da6db4162cce1d0c.tar.bz2 linux-development-workflow-be39a0bd06ba0dabab691ef6da6db4162cce1d0c.zip | |
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| -rw-r--r-- | README.md | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/README.md b/README.md new file mode 100644 index 0000000..d077e8c --- /dev/null +++ b/README.md @@ -0,0 +1,44 @@ +# My Linux Kernel Development Workflow + + +## 'Install' the required dependencies +``` +$ nix develop +``` + +or if youre not using flakes... + +``` +$ nix-shell linux.nix +``` + +## Build the kernel +``` +$ make x86_64_defconfig +$ make defconfig kvm_guest.config +$ scripts/config --set-val DEBUG_INFO y --set-val DEBUG y --set-val GDB_SCRIPTS y --set-val DEBUG_DRIVER y + +$ make +``` + +## Create root filesystem +``` +$ qemu-img create qemu-image.img 1g +$ mkfs.ext2 qemu-image.img +$ mkdir mnt +# mount -o loop qemu-image.img mnt +# debootstrap --arch amd64 jessie mnt +# chroot mnt /bin/sh +## passdw (set password) +## exit +``` + +## Run the VM with the built kernel +``` +$ qemu-system-x86_64 -kernel arch/x86/boot/bzImage -drive file=qemu-image.img,index=0,media=disk,format=raw -append "root=/dev/sda nokaslr console=ttyS0 earlyprintk=serial" -enable-kvm -nographic +``` + +## Debugging +1. Add `-s -S` to the qemu parameters +2. `gdb -ex "add-auto-load-safe-path $(pwd)" -ex "file vmlinux" -ex 'target remote 127.0.0.1:1234' -ex 'hbreak start_kernel'` +3. Debug! |