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GeezerVison is showing github.com — GitHub - fullstackguyhere/ABasicOperatingSystem: A basic operating system for 64bit with In-memory tar-based filesystem. Supports fork(), cow(), paging, virtual memory/ring3 user process and syscall using INT $80. Able to run a shell and binaries: ls, cat, echo, kill, ps,sleep

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Name		Name	Last commit message	Last commit date
bin		bin
crt		crt
include		include
libc		libc
rootfs		rootfs
sys		sys
HELPME.txt		HELPME.txt
LICENSE		LICENSE
Makefile		Makefile
Makefile.config		Makefile.config
README		README
spriyadarsha-data.img		spriyadarsha-data.img

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=> The provided Makefile:
  1) builds a kernel
  2) copies it into rootfs/boot/kernel/kernel
  3) creates an ISO CD image with the rootfs/ contents

=> To boot the system in QEMU, run:
qemu-system-x86_64 -curses -drive id=boot,format=raw,file=$USER.img,if=none -drive id=data,format=raw,file=$USER-data.img,if=none -device ahci,id=ahci -device ide-drive,drive=boot,bus=ahci.0 -device ide-drive,drive=data,bus=ahci.1 -gdb tcp::9999

Explanation of parameters:
  -curses         use a text console (omit this to use default SDL/VNC console)
  -drive ...      connect a CD-ROM or hard drive with corresponding image
  -device ...     configure an AHCI controller for the boot and data disks
  -gdb tcp::9999  listen for "remote" debugging connections on port NNNN
  -S              wait for GDB to connect at startup
  -no-reboot      prevent reboot when OS crashes

=> To connect a remote debugger to the running qemu VM, from a different window:
gdb ./kernel

At the (gdb) prompt, connect with:
target remote localhost:9999

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A basic operating system for 64bit with In-memory tar-based filesystem. Supports fork(), cow(), paging, virtual memory/ring3 user process and syscall using INT $80. Able to run a shell and binaries: ls, cat, echo, kill, ps,sleep