Boot Shim is a small ARM32 Windows Boot Manager Application that intended to chain-load ARM64 UEFI hacked Lumias, and particularly Lumia 950/950 XL. It is based on UEFI-Simple. IDE-debugging is not supported.

After copying all the firmware from the recovery image and shim to the rootfs, we're able to boot to a mostly working XFCE desktop. The main advantages of this approach are that you don't need to touch the device's firmware in order to run Linux.

shim, a first-stage UEFI bootloader shim is a trivial EFI application that, when run, attempts to open and execute another application. It will initially attempt to do this via the standard EFI LoadImage() and StartImage() calls.

The UEFI shim bootloader provides a level of digital signature indirection, enabling more authorities to participate in UEFI Secure Boot. Shims' certificates typically sign targeted UEFI applications, enabling certificate-based revocation where it makes sense.

I've updated my boot-shim (GitHub:imbushuo/boot-shim) to enable bootstrapping of random ARM32 ELF applications in Windows Boot Manager (UEFI) environment. There are a few requirements for such applications:

UEFI shim loader. Contribute to rhboot/shim development by creating an account on GitHub.

This is a simple proof of concept illustrating the use of shim (with the transparent loader enhancements) to load iPXE, which in turn boots an operating system.

Boot Shim is a small ARM32 Windows Boot Manager Application that intended to chain-load EFI code. It is based on UEFI-Simple. IDE-debugging is not supported.

Boot Shim is a small ARM32 Windows Boot Manager Application that intended to chain-load ARM64 UEFI hacked Lumias, and particularly Lumia 950/950 XL. It is based on UEFI-Simple. IDE-debugging is not supported.

Aug 15, 2024 · As a temporary workaround, secure boot must be disabled until there is an updated version of ventoy with the latest Shim version available. Edit: As pointed out by KevinLenoir , the target OS for SecureBoot can be changed from "Windows" to "Other OS" on Machines which support this feature.