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Stuff. And thing. Yeaaaaah!

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This commit is contained in:
Jarkko Toivanen 2023-06-14 20:06:27 +03:00
parent 3d7140b3fc
commit 968ea605d8
Signed by: jt
GPG key ID: 9151B109B73ECAD5
3 changed files with 37 additions and 25 deletions
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18
Makefile
View file

@ -1,6 +1,6 @@
all: kernel-i386.elf
clean:
rm *.o *.elf
-@rm *.o *.elf 2> /dev/null || true
start32.o: start32.asm
fasm start32.asm
@ -12,12 +12,18 @@ vga.o: vga.c
kernel-i386.elf: kernel.o start32.o vga.o
tcc -m32 -nostdlib -Wl,-Ttext,0x100000 start32.o kernel.o vga.o -o kernel-i386.elf
qemu: kernel-i386.elf
qemu-system-i386 -kernel kernel-i386.elf
qemu-multiboot: kernel-i386.elf
qemu-system-i386 -kernel kernel-i386.elf -serial file:CON
qemu-image: kernel-i386.elf mount
cp kernel-i386.elf mnt/
sync
qemu-system-i386 koalemos.img
mount: koalemos.img mnt/
sudo mount -o loop,offset=1048576,umask=177,dmask=222 koalemos.img mnt/
@if ! mountpoint -q "mnt/"; then \
sudo mount -o loop,offset=1048576,umask=177,dmask=222,uid=$(shell id -u),gid=$(shell id -g) koalemos.img mnt/; \
fi;
umount:
sudo umount mnt
@sudo umount mnt
mnt/:
mkdir mnt
@mkdir mnt

42
kernel.c
View file

@ -41,7 +41,7 @@ void kmain (unsigned int mbootmagick, multiboot_info_t* mbootinfo) {
//outb(0x3D5, 0x20);
//cls();
vga_init(VGA_COLOR_GREY, VGA_COLOR_BLACK);
vga_init(VGA_COLOR_BLACK, VGA_COLOR_GRAY);
vga_write_line("=== KoalemOS ===");
vga_write("Checking multiboot loader: ");
@ -51,26 +51,32 @@ void kmain (unsigned int mbootmagick, multiboot_info_t* mbootinfo) {
vga_write_color("INVALID MAGIC", VGA_COLOR_BLACK, VGA_COLOR_RED);
return;
}
vga_write((char *)mbootinfo->boot_loader_name);
if (mbootinfo->flags & MULTIBOOT_INFO_BOOT_LOADER_NAME)
vga_write((char *)mbootinfo->boot_loader_name);
else
vga_write_color("Unknown", VGA_COLOR_BLACK, VGA_COLOR_ORANGE);
vga_write("\nMultiboot flags: ");
vga_write(itoa(mbootinfo->flags, 2));
// Check videomode
vga_write("\nVideomode: 0x");
vga_write(itoa(mbootinfo->vbe_mode, 16));
vga_write(": ");
switch (mbootinfo->vbe_mode) {
case MULTIBOOT_FRAMEBUFFER_TYPE_INDEXED:
vga_write("Indexed");
break;
case MULTIBOOT_FRAMEBUFFER_TYPE_RGB:
vga_write("RGB");
break;
case MULTIBOOT_FRAMEBUFFER_TYPE_EGA_TEXT:
vga_write("EGA TEXT");
break;
default:
vga_write_color("UNKNOWN", VGA_COLOR_BLACK, VGA_COLOR_RED);
return;
vga_write("\nVideomode: ");
if (mbootinfo->flags & MULTIBOOT_INFO_VBE_INFO) {
vga_write("VBE 0x");
vga_write(itoa(mbootinfo->vbe_mode, 16));
} else if (mbootinfo->flags & MULTIBOOT_INFO_FRAMEBUFFER_INFO) {
vga_write("Framebuffer");
vga_write("\nVideo address: 0x");
vga_write(itoa(mbootinfo->framebuffer_addr, 16));
unsigned long long *vmem = &mbootinfo->framebuffer_addr;
*vmem = 0xff00ff;
} else {
vga_write_color("Not available", VGA_COLOR_BLACK, VGA_COLOR_RED);
return;
}
vga_write_line("\nExecution finished, halting...");
*(unsigned char *)0xb8000 = '!';
}

2
start32.asm
View file

@ -21,7 +21,7 @@ MULTIBOOT_CHECKSUM equ -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAG
; dd 0 ; video mode_type (0:fb, 1:txt) (set flags[2]!)
; dd 1024 ; video width
; dd 768 ; video height
; dd 32 ; video depth
; dd 24 ; video depth
section '.bss' writable align 16
stack_bottom: