On Feb 11, 2024, at 12:00, Mark Millard <mark...@yahoo.com> wrote: > [Only replying to what I've subscribed to --and I dropped > Warner as well.] > > On Feb 11, 2024, at 11:43, Mario Marietto <marietto2...@gmail.com> wrote: > >> ok. But what does this mean ? That I can use whatever Linux distro I want ? >> Or even the FreeBSD world ? > > Only to build L4Re. > > The LR4e built will not contain any Linux userland materials, > nor any FreeBSD userland materials. LR4e has its own userland > materials that will be present instead. > > http://os.inf.tu-dresden.de/download/snapshots/pre-built-images/arm64/ > > already contains pre-built .elf and .uimage files Why not use one > of those on the RPi4B? > > By size (larger), the most complete ones for the RPi4B seem to be > (both formats): > > http://os.inf.tu-dresden.de/download/snapshots/pre-built-images/arm64/bootstrap_vm-multi_rpi4.elf > http://os.inf.tu-dresden.de/download/snapshots/pre-built-images/arm64/bootstrap_vm-multi_rpi4.uimage > > http://os.inf.tu-dresden.de/download/snapshots/pre-built-images/arm64/bootstrap_vm-basic_rpi4.elf > http://os.inf.tu-dresden.de/download/snapshots/pre-built-images/arm64/bootstrap_vm-basic_rpi4.uimage
May be you are wanting to run FreeBSD in a virtual machine in the LR4e environment? For example, http://os.inf.tu-dresden.de/L4Re/screens.html shows a "Virtualized Linux running in a window" that is using a virtual machine environment to run Linux in, not directly using the Linux userland with the microkernel. It also shows an example of "A vritual machine" that shows a GNU GRUB running in the virtual machine. For this the pre-built images should be sufficient: no need to build your own L4Re. It is the virtual machine configuration that would be then at issue. >> On Sun, Feb 11, 2024 at 7:59 PM Mark Millard <mark...@yahoo.com> wrote: >> >> >> On Feb 11, 2024, at 05:44, Mario Marietto <marietto2...@gmail.com> wrote: >> >>> I'm trying to understand how to use the L4 Microkernel with a FreeBSD >>> userland. I've asked the same to a L4 developer,but he told me that he does >>> not know FreeBSD,so I'm here to ask the same question. First of all I'm >>> sure that it can be done,because it is written clearly on their website : >>> >>> >>> http://os.inf.tu-dresden.de/L4Re/download/snapshots/ >>> >>> >>> on the section : >>> Host system requirements >>> The host system shall be a 64bit-based system with a recent Linux >>> distribution installed and at least 2GB of free disk space. >>> All necessary tools required by the build are available from the provided >>> packages of the Linux distributions, including cross compilers. But there >>> are also other cross compiler packages available (see below). You might >>> want to run make check_build_tools in the src/l4 directory to verify the >>> common tools are installed. >>> You are free to use any Linux distribution you like, or even BSDs or any of >>> its derivatives. But then you should know the game. Especially tool >>> versions should be recent, as installed on the listed distributions below. >>> We are confident that the snapshot works on the following distributions: >>> • Debian 11 or later >>> • Ubuntu 22.04 or later >>> >>> Let's say I want to use the L4 microkernel + FreeBSD 14 on my Raspberry Pi >>> 4,the first step I did was to build L4Re for the Rpi,according with this >>> instructions : >>> >>> >>> http://os.inf.tu-dresden.de/L4Re/rpi.html >>> >>> This is the log file of the compilation,that hasn't given any error : >>> >>> >>> https://pastebin.ubuntu.com/p/6SwN2mpJBM/ >>> >>> >>> Or I could have taken a pre built image of the L4 microkernel here : >>> >>> >>> http://os.inf.tu-dresden.de/download/snapshots/pre-built-images/arm64/ >>> >>> >>> >>> At this point the tutorial says that I should use a Linux distro. They >>> suggest the official distro for the Raspberry Pi 4,that's RaspBian. But I >>> don't want to use Linux as a userland,I want to use FreeBSD. The question >>> now is : what should I do to achieve that goal ? How can I link the L4 >>> microkernel with the ubldr bootloader of FreeBSD ? Or should I link it to >>> the kernel of FreeBSD ? Can someone explain to me the missing step ? thanks. >> >> QUOTING the "Configuring yourself" section: >> The make setup step configures predefined setups for both the L4Re >> microkernel (Fiasco) and the L4Re user-level software, and connects both >> together so the images for the target system can be built. >> END QUOTE >> >> So L4Re has its own user-level software, not just a kernel. There is no use >> of a Linux or FreeBSD user-level software >> when L4Re is booted. (They are just used for building.) >> >> "The host system" is just a host for building the L4Re parts and assembling >> the image from the parts. The "Pulling it together" section is about >> combining the parts (including the microkernel and the user-level software) >> to make the overall image that does not include Linux or FreeBSD code. === Mark Millard marklmi at yahoo.com
