From c6882778696fe40b799887d35ec3f4b48792abaf Mon Sep 17 00:00:00 2001 From: Carlos Maiolino Date: Sun, 20 Jul 2025 14:38:22 +0200 Subject: Add kernel.c Create the kernel.c file and its initial start_kernel(), and jump to it from the ASM. Also setup the build system to actually build it Signed-off-by: Carlos Maiolino --- Makefile | 20 ++++++++++++++++---- 1 file changed, 16 insertions(+), 4 deletions(-) (limited to 'Makefile') diff --git a/Makefile b/Makefile index c43d848..eccede7 100644 --- a/Makefile +++ b/Makefile @@ -1,4 +1,12 @@ -FILLES = ./build/kernel.asm.o +FILLES = ./build/kernel.asm.o ./build/kernel.o +INCLUDES= -I./src/include +FLAGS= -g -ffreestanding -falign-jumps -falign-functions \ + -falign-labels -falign-loops -fstrength-reduce \ + -fomit-frame-pointer -finline-functions \ + -Wno-unused-function -fno-builtin -Werror \ + -Wno-unused-label -Wno-cpp -Wno-unused-parameter \ + -nostdlib -nostartfiles -nodefaultlibs -Wall -O0 -Iinc \ + BOOTLOADER=./src/boot/bootloader.asm TARGET=./bin/boot.bin @@ -8,9 +16,9 @@ all: ./bin/boot.bin ./bin/kernel.bin dd if=./bin/boot.bin >> ./bin/os.bin dd if=./bin/kernel.bin >> ./bin/os.bin dd if=/dev/zero bs=512 count=100 >> ./bin/os.bin -./bin/kernel.bin: ./build/kernel.asm.o - i686-elf-ld -g -relocatable ./build/kernel.asm.o -o ./build/cemOS.o - i686-elf-gcc -T ./src/linker.ld -o ./bin/kernel.bin -ffreestanding -O0 -nostdlib ./build/cemOS.o +./bin/kernel.bin: ./build/kernel.asm.o ./build/kernel.o + i686-elf-ld -g -relocatable ./build/kernel.asm.o ./build/kernel.o -o ./build/cemOS.o + i686-elf-gcc $(FLAGS) -T ./src/linker.ld -o ./bin/kernel.bin -ffreestanding -O0 -nostdlib ./build/cemOS.o ./bin/boot.bin: ./src/boot/bootloader.asm nasm -f bin $(BOOTLOADER) -o $(TARGET) @@ -18,9 +26,13 @@ all: ./bin/boot.bin ./bin/kernel.bin ./build/kernel.asm.o: ./src/kernel.asm nasm -f elf -g ./src/kernel.asm -o ./build/kernel.asm.o +./build/kernel.o: ./src/kernel.c + i686-elf-gcc $(INCLUDES) $(FLAGS) -std=gnu99 -c ./src/kernel.c -o ./build/kernel.o + clean: rm -f $(TARGET) rm -f bin/kernel.bin rm -f build/cemOS.o rm -f build/kernel.asm.o + rm -f build/kernel.o rm -f bin/os.bin -- cgit v1.2.3