scripts,Makefile: add creation of bootable disk images

Add support for creating bootable media for use with USB or HDD boot.
Also add support for running the generated media in QEMU.

.gitignore

@@ -3,10 +3,12 @@ builds
 host-builds
 host-pkgs
 iso
+img
 jinx
 pkgs
 sources
 astral.iso
+astral-bootable.img
 kernel-src/include/limine.h
 kernel-src/include/printf.h
 kernel-src/include/build.h

Makefile

@@ -1,16 +1,20 @@
 ISODIR=$(shell pwd)/iso
+IMGDIR=$(shell pwd)/img
 ISO=astral.iso
+IMG=astral-bootable.img
 DISKNAME=hdd.img
 LIMINEDIR=$(shell pwd)/host-pkgs/limine/usr/local/share/limine/
 KERNEL=$(shell pwd)/builds/astral/astral
-QEMUFLAGS=-M q35 -cdrom $(ISO) -m 4g -smp cpus=1 -no-shutdown -no-reboot -monitor stdio -debugcon file:/dev/stdout -serial file:/dev/stdout -netdev user,id=net0 -device virtio-net,netdev=net0 -object filter-dump,id=f1,netdev=net0,file=netdump.dat
+QEMUFLAGS=-M q35 -m 4g -smp cpus=1 -no-shutdown -no-reboot -monitor stdio -debugcon file:/dev/stdout -serial file:/dev/stdout -netdev user,id=net0 -device virtio-net,netdev=net0 -object filter-dump,id=f1,netdev=net0,file=netdump.dat
+QEMUISOFLAGS=-cdrom $(ISO)
 QEMUDISKFLAGS=-drive file=$(DISKNAME),if=none,id=nvme -device nvme,serial=deadc0ff,drive=nvme -boot order=dc
+QEMUIMGFLAGS=-drive file=$(IMG),if=none,id=usb -device nec-usb-xhci,id=xhci -device usb-storage,bus=xhci.0,drive=usb,removable=on
 INITRD=$(shell pwd)/initrds/initrd
 DISTROTYPE=full
 
 MINIMALPACKAGES=mlibc bash coreutils init distro-files vim nano mount netd shadow sudo neofetch
 
-.PHONY: all kernel clean clean-kernel iso initrd full minimal disk
+.PHONY: all kernel clean clean-kernel iso img initrd full minimal disk
 
 all: jinx
 	git submodule update --init --recursive
@@ -19,9 +23,11 @@ all: jinx
 	make build-$(DISTROTYPE)
 	make $(ISO)
 	@echo
-	@echo "|------------------------------------------------------------------------------------------|"
+	@echo "|--------------------------------------------------------------|"
-	@echo "|To regenerate the initrd, run 'make initrd iso'. To generate a disk image, run 'make disk'|"
+	@echo "|       To regenerate the initrd, run 'make initrd iso'.       |"
-	@echo "|------------------------------------------------------------------------------------------|"
+	@echo "| To generate a bootable USB/HDD image, run 'make initrd img'. |"
+	@echo "|         To generate a disk image, run 'make disk'.           |"
+	@echo "|--------------------------------------------------------------|"
 	@echo
 
 jinx:
@@ -29,6 +35,7 @@ jinx:
 	chmod +x jinx
 
 iso: $(ISO)
+img: $(IMG)
 
 $(ISO): limine.conf liminebg.bmp $(KERNEL) $(INITRD)-$(DISTROTYPE)
 	mkdir -p $(ISODIR)
@@ -36,6 +43,13 @@ $(ISO): limine.conf liminebg.bmp $(KERNEL) $(INITRD)-$(DISTROTYPE)
 	cp $(KERNEL) liminebg.bmp limine.conf $(LIMINEDIR)/limine-bios.sys $(LIMINEDIR)/limine-bios-cd.bin $(LIMINEDIR)/limine-uefi-cd.bin $(ISODIR)
 	xorriso -as mkisofs -b limine-bios-cd.bin -no-emul-boot -boot-load-size 4 -boot-info-table --efi-boot limine-uefi-cd.bin -efi-boot-part --efi-boot-image --protective-msdos-label $(ISODIR) -o $(ISO)
 
+$(IMG): limine.conf liminebg.bmp $(KERNEL) $(INITRD)-$(DISTROTYPE)
+	mkdir -p $(IMGDIR)/EFI/BOOT
+	ln -f $(INITRD)-$(DISTROTYPE) $(IMGDIR)/initrd
+	cp $(KERNEL) liminebg.bmp limine.conf $(LIMINEDIR)/limine-bios.sys $(IMGDIR)
+	cp $(LIMINEDIR)/BOOT{IA32,X64}.EFI $(IMGDIR)/EFI/BOOT
+	./genbootimg.sh 1G $(IMG) $(IMGDIR)
+
 # ------ build targets ------
 
 build-full:
@@ -95,19 +109,28 @@ clean:
 # ------ run targets ------
 
 run:
-	qemu-system-x86_64 $(QEMUFLAGS)
+	qemu-system-x86_64 $(QEMUFLAGS) $(QEMUISOFLAGS)
 
 run-gdb:
-	qemu-system-x86_64 $(QEMUFLAGS) -S -s
+	qemu-system-x86_64 $(QEMUFLAGS) $(QEMUISOFLAGS) -S -s
 
 run-kvm:
-	qemu-system-x86_64 $(QEMUFLAGS) -enable-kvm -cpu host
+	qemu-system-x86_64 $(QEMUFLAGS) $(QEMUISOFLAGS) -enable-kvm -cpu host
 
 run-disk:
-	qemu-system-x86_64 $(QEMUFLAGS) $(QEMUDISKFLAGS)
+	qemu-system-x86_64 $(QEMUFLAGS) $(QEMUISOFLAGS) $(QEMUDISKFLAGS)
 
 run-disk-gdb:
-	qemu-system-x86_64 $(QEMUFLAGS) $(QEMUDISKFLAGS) -S -s
+	qemu-system-x86_64 $(QEMUFLAGS) $(QEMUISOFLAGS) $(QEMUDISKFLAGS) -S -s
 
 run-disk-kvm:
-	qemu-system-x86_64 $(QEMUFLAGS) $(QEMUDISKFLAGS) -enable-kvm -cpu host
+	qemu-system-x86_64 $(QEMUFLAGS) $(QEMUISOFLAGS) $(QEMUDISKFLAGS) -enable-kvm -cpu host
+
+run-img:
+	qemu-system-x86_64 $(QEMUFLAGS) $(QEMUIMGFLAGS)
+
+run-img-gdb:
+	qemu-system-x86_64 $(QEMUFLAGS) $(QEMUIMGFLAGS) -S -s
+
+run-img-kvm:
+	qemu-system-x86_64 $(QEMUFLAGS) $(QEMUIMGFLAGS) -enable-kvm -cpu host

genbootimg.sh

@@ -0,0 +1,44 @@
+#!/usr/bin/bash
+
+if [ $# != 3 ]
+then
+	echo "usage: $0 size diskname"
+	exit 1
+fi
+
+if [ -z $1 ]
+then
+	echo "please pass a non empty size"
+	exit 1
+fi
+
+if [ -z $2 ]
+then
+	echo "please pass a non empty disk name"
+	exit 1
+fi
+
+if [ -z $3 ]
+then
+	echo "please pass a non empty imgdir"
+	exit 1
+fi
+
+
+# most of the below shamelessly stolen from
+# https://github.com/limine-bootloader/limine-c-template/blob/trunk/GNUmakefile
+# at commit 7310a9b098731cbd4242ed82f5c9b9c60ae14919
+
+rm -f "$2"
+truncate -s "$1" "$2"
+sgdisk "$2" -n 1:2048 -t 1:ef00
+host-pkgs/limine/usr/local/bin/limine bios-install "$2"
+mformat -i "$2@@1M"
+mmd -i "$2@@1M" ::/EFI ::/EFI/BOOT ::/boot ::/boot/limine
+
+img="$PWD/$2"
+
+cd "$3"
+#find . -type d -exec mmd -i "$img@@1M" ::{} \;
+# FIXME ^^^ breaks, but there's no dirs yet, so it doesn't matter :P
+find . -type f -exec mcopy -i "$img@@1M" {} ::{} \;