From b1a960ac6e9b2266df02966db034d438141d3c9b Mon Sep 17 00:00:00 2001 From: wrzosik Date: Sun, 30 Nov 2025 14:59:48 +0100 Subject: experiment: booting minimal initramfs Added experiment on building absolute bare-minimum initramfs and boot it in QEMU using direct boot method --- experiments/01_20250913_booting_minimal_image/README | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) create mode 100644 experiments/01_20250913_booting_minimal_image/README (limited to 'experiments/01_20250913_booting_minimal_image/README') diff --git a/experiments/01_20250913_booting_minimal_image/README b/experiments/01_20250913_booting_minimal_image/README new file mode 100644 index 0000000..685b30e --- /dev/null +++ b/experiments/01_20250913_booting_minimal_image/README @@ -0,0 +1,16 @@ +Initially this experiment was about booting kernel directly into VM with qemu +and making minimal initramfs + +At 29.11.2025 I decided to copy few binaries to initramfs to see if I can get +a working shell. Turned out it's actually easy and adding bin/dash, 2 libs it +dynamically links to at runtime (ld and libc) and making correct symlinks was +enough to get me started + +binaries copied: +/bin/dash +/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2 +/lib/x86_64-linux-gnu/libc.so.6 + +links: +/init -> /bin/dash +/lib64/ld-linux-x86-64.so.2 -> /lib/x86_64-linux-gnu/ld-linux-x86-64.so.2 -- cgit v1.2.3