alirezaarzehgar · May 25, 2024 07:11 · alirezaarzehgar · May 25, 2024
diff --git a/install.sh b/install.sh
 #!/usr/bin/env bash
 nasm -f elf32 kernel.asm -o kasm.o
 gcc -m32 -c kernel.c -o kc.o
 ld -m elf_i386 -T link.ld -o kernel kasm.o kc.o
 mkdir -p root/boot/grub
 cp kernel root/boot
 echo "multiboot /boot/kernel;boot" > root/boot/grub/grub.cfg
 grub-mkrescue -o os.iso root
 rm -rf root *.o
diff --git a/kernel.asm b/kernel.asm
 section .text
        align 4
        dd 0x1BADB002
        dd 0x00
        dd - (0x1BADB002 + 0x00)

 global start
 extern kernel_main

 start:
 	cli
 	mov esp, stack_space
 	call kernel_main
 	hlt

 section .bss
 resb 8192
 stack_space:
diff --git a/kernel.c b/kernel.c
 #define VIDEO_MEMORY (char *)0xb8000
 char *vid = VIDEO_MEMORY;

 void print_str(const char *const str, unsigned int len)
 {
 	for (unsigned int i = 0; i < len; i++)
 	{
 		*(vid++) = str[i];
 		*(vid++) = 0x07;
 	}
 }

 void clear_screen()
 {
 	const char *str = "         ";
 	for (int i = 0; i < 80 * 25; i++)
 		print_str(str, 10);

 	vid = VIDEO_MEMORY;
 }

 void kernel_main(void)
 {
 	clear_screen();
 	print_str("Ha bemola ke!", 13);
 }
diff --git a/link.ld b/link.ld
 OUTPUT_FORMAT(elf32-i386)
 ENTRY(start)
 SECTIONS
 {
   . = 0x100000;
   .text : { *(.text) }
   .data : { *(.data) }
   .bss  : { *(.bss)  }
 }
	#!/usr/bin/env bash
	nasm -f elf32 kernel.asm -o kasm.o
	gcc -m32 -c kernel.c -o kc.o
	ld -m elf_i386 -T link.ld -o kernel kasm.o kc.o
	mkdir -p root/boot/grub
	cp kernel root/boot
	echo "multiboot /boot/kernel;boot" > root/boot/grub/grub.cfg
	grub-mkrescue -o os.iso root
	rm -rf root *.o
	#define VIDEO_MEMORY (char *)0xb8000
	char *vid = VIDEO_MEMORY;

	void print_str(const char *const str, unsigned int len)
	{
	for (unsigned int i = 0; i < len; i++)
	{
	*(vid++) = str[i];
	*(vid++) = 0x07;
	}
	}

	void clear_screen()
	{
	const char *str = " ";
	for (int i = 0; i < 80 * 25; i++)
	print_str(str, 10);

	vid = VIDEO_MEMORY;
	}

	void kernel_main(void)
	{
	clear_screen();
	print_str("Ha bemola ke!", 13);
	}