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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 $80. Able to run a shell and binaries: ls, cat, echo, kill, ps,sleep
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fullstackguyhere/ABasicOperatingSystem
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=> The provided Makefile: 1) builds a kernel 2) copies it into rootfs/boot/kernel/kernel 3) creates an ISO CD image with the rootfs/ contents => To boot the system in QEMU, run: qemu-system-x86_64 -curses -drive id=boot,format=raw,file=$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
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