feat: adds basic process management

Makefile

@@ -1,112 +1,26 @@
-ASM = nasm
-CC = gcc
-BOOTSTRAP_FILE = bootstrap.asm 
-SIMPLE_KERNEL = simple_kernel.asm
-INIT_KERNEL_FILES = starter.asm
-KERNEL_FILES = main.c
-
-# -m32 means generate 32-bit code. See "Machine-Dependent Options" section in gcc man page for details. Under "x86 Options" section "-m flag".
-#
-# -Wall:
-#			"This enables all the warnings about constructions that some
-#           users consider questionable, and that are easy to avoid (or
-#           modify to prevent the warning), even in conjunction with
-#           macros.  This also enables some language-specific warnings
-#           described in C++ Dialect Options and Objective-C and
-#           Objective-C++ Dialect Options." 
-# 			~ GCC man page
-# 
-# -c:
-# 			"If any of these options is used [-c, -S, -E], then the linker is not run, and object file names should not be used as arguments."
-# 			~ GCC man page
-#
-# -ffreestanding:
-#			"Assert that compilation targets a freestanding environment.
-#           This implies -fno-builtin.  A freestanding environment is one
-#           in which the standard library may not exist, and program
-#           startup may not necessarily be at "main".  The most obvious
-#           example is an OS kernel.  This is equivalent to -fno-hosted."
-# 			~ GCC man page
-#
-# -no-pie:
-#			"Don't produce a dynamically linked position independent executable."
-# 			~ GCC man page
-#
-# -g:
-#			"To tell GCC to emit extra information for use by a debugger, in almost all cases you need only to add -g to your other options."
-# 			~ GCC man page
-#
-# -std=
-#			"Determine the language standard.   This option is currently only supported when compiling C or C++."
-#			gnu99: "GNU dialect of ISO C99.  The name gnu9x is deprecated."
-#			gnu18: "GNU dialect of ISO C17.  This is the default for C code."
-# 			~ GCC man page
-#-std=gnu99 # -c -Wall -no-pie -g -std=gnu99
-KERNEL_FLAGS = -Wall -m32 -c -ffreestanding -fno-asynchronous-unwind-tables -fno-pie
-#  -O1 -fno-pie 
-KERNEL_OBJECT = -o kernel.elf
-
-build:
-	echo Please Choose Type
-
-kernel: $(BOOTSTRAP_FILE) $(KERNEL_FILE)
-	$(ASM) -f bin $(BOOTSTRAP_FILE) -o bootstrap.o
-	$(ASM) -f elf32 $(INIT_KERNEL_FILES) -o starter.o 
-	$(CC) $(KERNEL_FLAGS) $(KERNEL_FILES) $(KERNEL_OBJECT)
-	$(CC) $(KERNEL_FLAGS) screen.c -o screen.elf
-	$(CC) $(KERNEL_FLAGS) process.c -o process.elf
-	$(CC) $(KERNEL_FLAGS) scheduler.c -o scheduler.elf
-	ld -melf_i386 -Tlinker.ld starter.o kernel.elf screen.elf process.elf scheduler.elf -o minios.elf
-	objcopy -O binary minios.elf minios.bin
-	dd if=bootstrap.o of=kernel.img
-	dd seek=1 conv=sync if=minios.bin of=kernel.img bs=512 count=8
-	dd seek=9 conv=sync if=/dev/zero of=kernel.img bs=512 count=2046
-	#bochs -f bochs
-
-run: 
-	qemu-system-x86_64 -s kernel.img
-
-debug: $(BOOTSTRAP_FILE) $(KERNEL_FILE)
-	$(ASM) -f bin $(BOOTSTRAP_FILE) -o bootstrap.o
-	$(ASM) -f elf32 $(INIT_KERNEL_FILES) -o starter.o 
-	$(CC) $(KERNEL_FLAGS) $(KERNEL_FILES) $(KERNEL_OBJECT)
-	$(CC) $(KERNEL_FLAGS) screen.c -o screen.elf
-	$(CC) $(KERNEL_FLAGS) process.c -o process.elf
-	$(CC) $(KERNEL_FLAGS) scheduler.c -o scheduler.elf
-	ld -melf_i386 -Tlinker.ld starter.o kernel.elf screen.elf process.elf scheduler.elf -o minios.elf
-	objcopy -O binary minios.elf minios.bin
-	dd if=bootstrap.o of=kernel.img
-	dd seek=1 conv=sync if=minios.bin of=kernel.img bs=512 count=8
-	dd seek=9 conv=sync if=/dev/zero of=kernel.img bs=512 count=2045
-	bochs -f bochs
-	#qemu-system-x86_64 -s kernel.img
-
-fromgas: $(BOOTSTRAP_FILE) $(KERNEL_FILE)
-	$(ASM) -f bin $(BOOTSTRAP_FILE) -o bootstrap.o
-	$(ASM) -f bin $(INIT_KERNEL_FILES) -o starter.o
-	#$(CC) $(KERNEL_FLAGS) $(KERNEL_FILES) $(KERNEL_OBJECT)
-	as --32 main.s -o kernel.elf
-	objcopy -O binary kernel.elf kernel.o
-	ld -Ttext 0x0900 -b binary --oformat=binary starter.o kernel.o -o minios.bin
-	dd if=bootstrap.o of=kernel.img
-	dd seek=1 conv=sync if=minios.bin of=kernel.img bs=512
-	dd seek=2 conv=sync if=/dev/zero of=kernel.img bs=512 count=2046
-	#bochs -f bochs
-	#qemu-system-x86_64 -s kernel.img
-
-asm: $(KERNEL_FILE)
-	$(CC) $(KERNEL_FLAGS) -S $(KERNEL_FILES)
-
-simplekernel: $(BOOTSTRAP_FILE) $(SIMPLE_KERNEL)
-	$(ASM) -f bin $(BOOTSTRAP_FILE) -o bootstrap.o
-	$(ASM) -f bin $(SIMPLE_KERNEL) -o kernel.o
-	dd if=bootstrap.o of=kernel.img
-	dd seek=1 conv=sync if=kernel.o of=kernel.img bs=512
-	qemu-system-x86_64 -s kernel.img
-
-
-clean:
-	rm -f *.o
-	rm -f *.elf
-	rm -f *.img
-	rm -f *.bin
+ASM = nasm
+CC = gcc
+BOOTSTRAP_FILE = bootstrap.asm
+SIMPLE_KERNEL = simple_kernel.asm
+INIT_KERNEL_FILES = starter.asm
+KERNEL_FILES = main.c
+KERNEL_FLAGS = -Wall -m32 -c -ffreestanding -fno-asynchronous-unwind-tables -fno-pie
+KERNEL_OBJECT = -o kernel.elf
+
+build: $(BOOTSTRAP_FILE) $(KERNEL_FILE)
+	$(ASM) -f bin $(BOOTSTRAP_FILE) -o bootstrap.o
+	$(ASM) -f elf32 $(INIT_KERNEL_FILES) -o starter.o
+	$(CC) $(KERNEL_FLAGS) $(KERNEL_FILES) $(KERNEL_OBJECT)
+	$(CC) $(KERNEL_FLAGS) screen.c -o screen.elf
+	$(CC) $(KERNEL_FLAGS) process.c -o process.elf
+	$(CC) $(KERNEL_FLAGS) scheduler.c -o scheduler.elf
+	$(CC) $(KERNEL_FLAGS) heap.c -o heap.elf
+	$(CC) $(KERNEL_FLAGS) paging.c -o paging.elf
+	ld -melf_i386 -Tlinker.ld starter.o kernel.elf screen.elf process.elf scheduler.elf heap.elf paging.elf -o minos.elf
+	objcopy -O binary minos.elf minos.bin
+	dd if=bootstrap.o of=kernel.img
+	dd seek=1 conv=sync if=minos.bin of=kernel.img bs=512 count=8
+	dd seek=9 conv=sync if=/dev/zero of=kernel.img bs=512 count=2046
+
+run:
+	qemu-system-x86_64 -s kernel.img