ryuukumar · ryuukumar · Mar 15, 2026 · Mar 15, 2026 · Mar 15, 2026 · Mar 15, 2026
diff --git a/.github/workflows/format-check.yml b/.github/workflows/format-check.yml
@@ -16,5 +16,4 @@ jobs:
         run: sudo apt-get install -y clang-format
 
       - name: Run clang-format in dry-run mode
-        run: |
-          find src/ include/ -type f \( -name '*.c' -o -name '*.h' \) ! -name 'limine.h' -exec clang-format --Werror --dry-run {} +
+        run: make format
diff --git a/Makefile b/Makefile
@@ -0,0 +1,15 @@
+.PHONY: all kernel clean format
+
+all: kernel
+
+kernel:
+	@echo "Building Kernel..."
+	$(MAKE) -C kernel
+
+format:
+	@echo "Formatting Kernel..."
+	$(MAKE) -C kernel format
+
+clean:
+	@echo "Cleaning Kernel..."
+	$(MAKE) -C kernel clean
diff --git a/build.sh b/build.sh
@@ -113,7 +113,7 @@ echo -e "\e[1;33m\n$(heading "Building OS binaries")\n\e[0m"
 
 make -j$(nproc)
 
-echo -e "\nentry.elf generated with size $(wc -c <"build/entry.elf") bytes"
+echo -e "\nentry.elf generated with size $(wc -c <"build/kernel/entry.elf") bytes"
 
 echo -e "\e[1;33m\n$(heading "Building Limine-deploy")\n\e[0m"
 
@@ -130,7 +130,7 @@ mkdir -p iso_root/boot/limine
 
 # Copy the relevant files over.
 cp -v limine.conf limine/limine-bios.sys limine/limine-bios-cd.bin limine/limine-uefi-cd.bin iso_root/boot/limine/
-cp -v build/entry.elf iso_root/boot/
+cp -v build/kernel/entry.elf iso_root/boot/
 
 # Create the EFI boot tree and copy Limine's EFI executables over.
 mkdir -p iso_root/EFI/BOOT

diff --git a/GNUmakefile → kernel/GNUmakefile b/GNUmakefile → kernel/GNUmakefile
@@ -81,36 +81,40 @@ endif
 
 # Use "find" to glob all *.c, *.s, and *.asm files in the tree and obtain the
 # object and header dependency file names.
-override CFILES := $(shell find -L . -type f -name '*.c' | grep -v 'limine/')
-override ASFILES := $(shell find -L . -type f -name '*.s' | grep -v 'limine/')
-override OBJ := $(patsubst %.c,build/%.c.o,$(CFILES)) $(patsubst %.s,build/%.s.o,$(ASFILES))
-override HEADER_DEPS := $(patsubst %.c,build/%.c.d,$(CFILES)) $(patsubst %.s,build/%.s.d,$(ASFILES))
+override CFILES := $(shell find -L . -type f -name '*.c')
+override ASFILES := $(shell find -L . -type f -name '*.s')
+
+# Output directory for the build. Can be overridden.
+override BUILD_DIR := ../build/kernel
+
+override OBJ := $(patsubst %.c,$(BUILD_DIR)/%.c.o,$(CFILES)) $(patsubst %.s,$(BUILD_DIR)/%.s.o,$(ASFILES))
+override HEADER_DEPS := $(patsubst %.c,$(BUILD_DIR)/%.c.d,$(CFILES)) $(patsubst %.s,$(BUILD_DIR)/%.s.d,$(ASFILES))
 
 # Default target.
 .PHONY: all
-all: build/$(KERNEL)
+all: $(BUILD_DIR)/$(KERNEL)
 
 # Link rules for the final kernel executable.
-build/$(KERNEL): $(OBJ)
+$(BUILD_DIR)/$(KERNEL): $(OBJ)
 	$(LD) $(OBJ) $(LDFLAGS) -o $@
 
 # Include header dependencies.
 -include $(HEADER_DEPS)
 
 # Compilation rules for *.c files.
-build/%.c.o: %.c | $(BUILD_DIR)
+$(BUILD_DIR)/%.c.o: %.c
 	@mkdir -p $(@D)
 	$(CC) $(CFLAGS) $(CPPFLAGS) -c $< -o $@
 
 # Compilation rules for *.S files.
-build/%.s.o: %.s
+$(BUILD_DIR)/%.s.o: %.s
 	@mkdir -p $(@D)
 	$(CC) $(CFLAGS) $(CPPFLAGS) -c $< -o $@
 
 # Remove object files and the final executable.
 .PHONY: clean
 clean:
-	rm -rf $(KERNEL) $(OBJ) $(HEADER_DEPS)
+	rm -rf $(BUILD_DIR)
 
 # Format C source and header files (only touches src/ and main/)
 .PHONY: format

diff --git a/include/kernel/console.h → kernel/include/kernel/console.h b/include/kernel/console.h → kernel/include/kernel/console.h
diff --git a/include/kernel/gdt.h → kernel/include/kernel/gdt.h b/include/kernel/gdt.h → kernel/include/kernel/gdt.h
diff --git a/include/kernel/graphics.h → kernel/include/kernel/graphics.h b/include/kernel/graphics.h → kernel/include/kernel/graphics.h
diff --git a/include/kernel/hardfonts/classic.h → kernel/include/kernel/hardfonts/classic.h b/include/kernel/hardfonts/classic.h → kernel/include/kernel/hardfonts/classic.h
diff --git a/include/kernel/hw/pic.h → kernel/include/kernel/hw/pic.h b/include/kernel/hw/pic.h → kernel/include/kernel/hw/pic.h
diff --git a/include/kernel/idt.h → kernel/include/kernel/idt.h b/include/kernel/idt.h → kernel/include/kernel/idt.h
diff --git a/include/kernel/io.h → kernel/include/kernel/io.h b/include/kernel/io.h → kernel/include/kernel/io.h
diff --git a/include/kernel/limine.h → kernel/include/kernel/limine.h b/include/kernel/limine.h → kernel/include/kernel/limine.h
diff --git a/include/kernel/memmgt.h → kernel/include/kernel/memmgt.h b/include/kernel/memmgt.h → kernel/include/kernel/memmgt.h
diff --git a/include/kernel/serial.h → kernel/include/kernel/serial.h b/include/kernel/serial.h → kernel/include/kernel/serial.h
diff --git a/include/kernel/stack.h → kernel/include/kernel/stack.h b/include/kernel/stack.h → kernel/include/kernel/stack.h
diff --git a/include/liballoc/liballoc.h → kernel/include/liballoc/liballoc.h b/include/liballoc/liballoc.h → kernel/include/liballoc/liballoc.h
diff --git a/include/memory.h → kernel/include/memory.h b/include/memory.h → kernel/include/memory.h
diff --git a/include/stdio.h → kernel/include/stdio.h b/include/stdio.h → kernel/include/stdio.h
diff --git a/include/string.h → kernel/include/string.h b/include/string.h → kernel/include/string.h
diff --git a/src/kernel/console.c → kernel/src/kernel/console.c b/src/kernel/console.c → kernel/src/kernel/console.c
diff --git a/src/kernel/entry.c → kernel/src/kernel/entry.c b/src/kernel/entry.c → kernel/src/kernel/entry.c
diff --git a/src/kernel/gdt.c → kernel/src/kernel/gdt.c b/src/kernel/gdt.c → kernel/src/kernel/gdt.c
diff --git a/src/kernel/gdt.s → kernel/src/kernel/gdt.s b/src/kernel/gdt.s → kernel/src/kernel/gdt.s
diff --git a/src/kernel/graphics.c → kernel/src/kernel/graphics.c b/src/kernel/graphics.c → kernel/src/kernel/graphics.c
diff --git a/src/kernel/hardfonts/classic.c → kernel/src/kernel/hardfonts/classic.c b/src/kernel/hardfonts/classic.c → kernel/src/kernel/hardfonts/classic.c
diff --git a/src/kernel/hw/pic.c → kernel/src/kernel/hw/pic.c b/src/kernel/hw/pic.c → kernel/src/kernel/hw/pic.c
diff --git a/src/kernel/idt.c → kernel/src/kernel/idt.c b/src/kernel/idt.c → kernel/src/kernel/idt.c
diff --git a/src/kernel/io.c → kernel/src/kernel/io.c b/src/kernel/io.c → kernel/src/kernel/io.c
diff --git a/src/kernel/isr_setup.s → kernel/src/kernel/isr_setup.s b/src/kernel/isr_setup.s → kernel/src/kernel/isr_setup.s
diff --git a/src/kernel/limine_requests.c → kernel/src/kernel/limine_requests.c b/src/kernel/limine_requests.c → kernel/src/kernel/limine_requests.c
diff --git a/src/kernel/memmgt.c → kernel/src/kernel/memmgt.c b/src/kernel/memmgt.c → kernel/src/kernel/memmgt.c
diff --git a/src/kernel/serial.c → kernel/src/kernel/serial.c b/src/kernel/serial.c → kernel/src/kernel/serial.c
diff --git a/src/kernel/stack.c → kernel/src/kernel/stack.c b/src/kernel/stack.c → kernel/src/kernel/stack.c
diff --git a/src/liballoc/liballoc.c → kernel/src/liballoc/liballoc.c b/src/liballoc/liballoc.c → kernel/src/liballoc/liballoc.c
diff --git a/src/linker.ld → kernel/src/linker.ld b/src/linker.ld → kernel/src/linker.ld
diff --git a/src/memory.c → kernel/src/memory.c b/src/memory.c → kernel/src/memory.c
diff --git a/src/stdio.c → kernel/src/stdio.c b/src/stdio.c → kernel/src/stdio.c
diff --git a/src/string.c → kernel/src/string.c b/src/string.c → kernel/src/string.c