From 02a4f7fa2100809d84b93dbe8d6c828e4768ad41 Mon Sep 17 00:00:00 2001 From: Carlos Maiolino Date: Fri, 25 Jul 2025 08:28:53 +0200 Subject: Build vga and string libs Also add a small test to the kernel code Signed-off-by: Carlos Maiolino --- Makefile | 22 ++++++++++++++++++---- src/kernel.c | 7 ++++++- 2 files changed, 24 insertions(+), 5 deletions(-) diff --git a/Makefile b/Makefile index 1fb6bfb..dfdcae5 100644 --- a/Makefile +++ b/Makefile @@ -4,13 +4,20 @@ BOOT_ASM =./src/boot/bootloader.asm KERNEL_ASM_OBJ = $(BUILD_DIR)/kernel.asm.o KERNEL_OBJ = $(BUILD_DIR)/kernel.o -KOBJ_FILES = $(KERNEL_ASM_OBJ) $(KERNEL_OBJ) + +KLIB_FILES = ./src/lib/string.c + +KOBJ_LIBS = ./build/string.o + +KOBJ_FILES = $(KERNEL_ASM_OBJ) \ + $(KERNEL_OBJ) \ + ./build/vga.o BOOT_TGT =./bin/boot.bin KERNEL_TGT = ./bin/kernel.bin BIN_TGT = $(BOOT_TGT) $(KERNEL_TGT) -INCLUDES = -I./src/include +INCLUDES = -I ./src/include FLAGS = -g -ffreestanding -falign-jumps -falign-functions \ -falign-labels -falign-loops -fstrength-reduce \ -fomit-frame-pointer -finline-functions \ @@ -26,7 +33,7 @@ all: $(BIN_TGT) dd if=./bin/kernel.bin >> ./bin/os.bin dd if=/dev/zero bs=512 count=100 >> ./bin/os.bin ./bin/kernel.bin: $(KOBJ_FILES) - i686-elf-ld -g -relocatable $(KOBJ_FILES) -o $(BUILD_DIR)/cemOS.o + i686-elf-ld -g -relocatable $(KOBJ_FILES) $(KOBJ_LIBS) -o $(BUILD_DIR)/cemOS.o i686-elf-gcc $(FLAGS) -T ./src/linker.ld -o ./bin/kernel.bin -ffreestanding -O0 -nostdlib $(BUILD_DIR)/cemOS.o ./bin/boot.bin: $(BOOT_ASM) @@ -35,13 +42,20 @@ all: $(BIN_TGT) $(BUILD_DIR)/kernel.asm.o: ./src/kernel.asm nasm -f elf -g ./src/kernel.asm -o $(BUILD_DIR)/kernel.asm.o -$(BUILD_DIR)/kernel.o: ./src/kernel.c +$(BUILD_DIR)/kernel.o: ./src/kernel.c ./build/vga.o $(KOBJ_LIBS) i686-elf-gcc $(INCLUDES) $(FLAGS) -std=gnu99 -c ./src/kernel.c -o $(BUILD_DIR)/kernel.o +$(BUILD_DIR)/vga.o: ./src/vga.c $(KOBJ_LIBS) + i686-elf-gcc $(INCLUDES) $(FLAGS) -std=gnu99 -c ./src/vga.c -o $(BUILD_DIR)/vga.o + +$(KOBJ_LIBS): + i686-elf-gcc $(INCLUDES) $(FLAGS) -std=gnu99 -c ./src/lib/string.c -o $(BUILD_DIR)/string.o clean: rm -f $(BOOT_TGT) rm -f bin/kernel.bin rm -f build/cemOS.o rm -f build/kernel.asm.o rm -f build/kernel.o + rm -f build/vga.o + rm -f build/string.o rm -f bin/os.bin diff --git a/src/kernel.c b/src/kernel.c index d39aac5..bca7849 100644 --- a/src/kernel.c +++ b/src/kernel.c @@ -1,6 +1,11 @@ #include +#include +#include +#include +#include "lib/string.h" void start_kernel() - { + init_display(2); + vprintl("Hello World!!!\n"); } -- cgit v1.2.3