Linux-from-scratch

These binaries/kernel were compiled with CLang(LLVM)!

Binaries ready to run Linux on arch's: Arm64, x86_64 & RiscV64 with QEMU.

Description

• Kernel: 6.11.0 with LLVM(clang version 17.0.6) and Rust Support Enabled.
• Bash: BusyBox 1.36.
• BootFS: initramfs.cpio.gz
• Init Script: /init

TODOs

• Add C Compiler (like a TinyCC)

Required

QEMU

We will use Qemu for launching Linux on our X86_64 hardware. This is ideal for prototyping in a RISC-V without having specific hardware. QEMU is a generic and open source machine emulator and virtualizer.

RHEL Linux

sudo dnf install qemu-system-riscv qemu-system-x86_64 qemu-system-aarch64

How to run:

./start.sh

Base articles

• https://risc-v-getting-started-guide.readthedocs.io/en/latest/linux-qemu.html

• https://risc-v-machines.readthedocs.io/en/latest/linux/simple/

• https://github.com/UCanLinux/riscv64-sample

Output

qemu-system-riscv64 -nographic -machine virt -bios default \
  -kernel KernelImage \
  -initrd initramfs.cpio.gz \
  -m 512M -smp 2 \
  -append "console=ttyS0 loglevel=7 earlyprintk=serial" \
  -device virtio-net-device,netdev=eth0 -netdev user,id=eth0

OpenSBI v0.6
   ____                    _____ ____ _____
  / __ \                  / ____|  _ \_   _|
 | |  | |_ __   ___ _ __ | (___ | |_) || |
 | |  | | '_ \ / _ \ '_ \ \___ \|  _ < | |
 | |__| | |_) |  __/ | | |____) | |_) || |_
  \____/| .__/ \___|_| |_|_____/|____/_____|
        | |
        |_|

Platform Name          : QEMU Virt Machine
Platform HART Features : RV64ACDFIMSU
Platform Max HARTs     : 8
Current Hart           : 0
Firmware Base          : 0x80000000
Firmware Size          : 120 KB
Runtime SBI Version    : 0.2

MIDELEG : 0x0000000000000222
...
...
initing...
mounting...
Setup DHCP...
udhcpc: started, v1.36.1
udhcpc: broadcasting discover
udhcpc: broadcasting select for 10.0.2.15, server 10.0.2.2
udhcpc: lease of 10.0.2.15 obtained from 10.0.2.2, lease time 86400
Welcome to you Linux RISC-V 64 Environment!
arch: riscv64: Linux (none) 6.11.0-rc4-gc97670d2ca04 #1 SMP Sat Sep 14 14:53:54 -03 2024 riscv64 GNU/Linux
~ # ls
bin                init               proc               tmp
dev                initramfs.cpio.gz  root               usr
etc                linuxrc            sbin
home               mnt                sys
~ # cd bin
/bin # cat /proc/version
Linux version 6.11.0-rc4-gc97670d2ca04 (clang version 17.0.6, LLD 18.1.7)
~ # ping google.com
PING google.com (142.251.129.206): 56 data bytes
64 bytes from 142.251.129.206: seq=0 ttl=255 time=18.419 ms
64 bytes from 142.251.129.206: seq=1 ttl=255 time=17.230 ms
64 bytes from 142.251.129.206: seq=2 ttl=255 time=16.737 ms
^C
--- google.com ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss