Initial ISO stuff

.gitignore

@@ -1,3 +1,5 @@
 .vscode
 *.o
 *.bin
+vm/
+*.iso

Makefile

@@ -13,5 +13,21 @@ objs = loader.o kernel.o
 ferglos.bin: linker.ld $(objs)
 	ld $(LDPARAMS) -T $< -o $@ $(objs)
 
-install: ferglos.bin
-	sudo cp $< /boot/ferglos.bin
+ferglos.iso: ferglos.bin
+	mkdir -p iso/boot/grub
+	cp ferglos.bin iso/boot/ferglos.bin
+	echo 'set timeout=0' 			 		 > iso/boot/grub/grub.cfg
+	echo 'set default=0' 					>> iso/boot/grub/grub.cfg
+	echo '' 								>> iso/boot/grub/grub.cfg
+	echo 'menuentry "FerglOS" {'    		>> iso/boot/grub/grub.cfg
+	echo '	multiboot /boot/ferglos.bin' 	>> iso/boot/grub/grub.cfg
+	echo '	boot' 							>> iso/boot/grub/grub.cfg
+	echo '}' 								>> iso/boot/grub/grub.cfg
+	grub-mkrescue --output=ferglos.iso iso
+	rm -rf iso
+
+run: ferglos.iso
+	/usr/lib/virtualbox/VirtualBoxVM --startvm FerglOS
+
+clean:
+	rm -rfv iso *.o *.bin

kernel.cpp

@@ -9,8 +9,14 @@ void printf(char* str) {
     }
 }
 
+typedef void (*constructor)();
 extern "C" constructor start_ctors;
 extern "C" constructor end_ctors;
+extern "C" void call_constructors() {
+    for (constructor* i = &start_ctors; i != (constructor*)end_ctors; i++) {
+        (*i)();
+    }
+}
 
 /* 
     take in the multiboot structure and the GRUB magic number 

loader.s

@@ -9,10 +9,14 @@
 
 .section .text
 .extern ferglos_Main
+.extern call_constructors
 .global loader
 
 loader:
     mov $kernel_stack, %esp 
+
+    call call_constructors
+    
     push %eax
     push %ebx
     call ferglos_Main