In addition to mtools, I wrote a tool to package a set of files into a fresh VFAT image - kinda like tar, but fat32 as output format. I'm using it in my hobby OS project. It's a single C file but seems to work great, albeit only tested in my workflow so far. Called it `fatcreate`, it's available on my Gitlab [1] or on GitHub[2].
Best, Mara [1] https://praios.lf-net.org/littlefox/lf-os_amd64/-/blob/main/util/fatcreate.c [2] https://github.com/LittleFox94/lf-os_amd64/blob/main/util/fatcreate.c Am Fri, Jun 03, 2022 at 05:06:50PM -0500 schrieb Brian J. Johnson:
Qemu's virtual VFAT (vvfat) disk type is a convenient way to test UEFI applications. It presents a folder on the host as a VFAT file system to the guest. It's not the fastest or the most stable disk type (be careful not to modify files from the host while the guest is running), but it's really handy.Another way to put a file on a UEFI VFAT disk image for qemu is to use mtools (https://www.gnu.org/software/mtools/), a set of user-mode programs which can manipulate FAT disk images. You can write some scripts around them to automate your workflow, similarly to uefi-run. I've done that quite a bit in the past.Good luck, Brian J. Johnson -------- Original Message -------- From: Ayush Singh [mailto:ayushdevel1...@gmail.com] Sent: Friday, June 3, 2022, 11:49 AM To: edk2-devel-groups-io <devel@edk2.groups.io> Subject: [edk2-devel] Running and Testing Modules and Applications Hello everyone, I wanted to ask everyone how most modules and applications are run/tested in edk2. I will be working on Adding Rust support for edk2 during GSoC and thus will probably have to do a lot of primitive testing. I did look at the EmulationPkg but didn't really understand how to use it. It simply drops me into gdb, although maybe that's what it is supposed to do? There were also some GUI programs (VisualUefi) that can be used in windows, but since I am in Linux, they aren't much useful. I also found a tutorial to run it in a physical machine(https://tait.tech/2021/04/18/uefi-development-environment/ ), but thatseems more for the final testing rather than testing during development. I have also tried using qemu for running applications, and I guess I was somewhat successful by using the script: `https://github.com/Richard-W/uefi-run` to test out uefi applications in qemu. However, it builds a FAT filesystem around the EFI application, so I was wondering if there was a better and simpler way to do it. Ayush Singh
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