Started rewrite

1 files changed, 49 insertions, 0 deletions

diff --git a/src/entry.asm b/src/entry.asm
new file mode 100644
index 0000000..35cede5
--- /dev/null
+++ b/src/entry.asm
@@ -0,0 +1,49 @@
+bits 32
+
+kernel_stack equ 0x4000
+multiboot_magic equ 0xe85250d6
+
+section .text
+	align 4
+
+	multiboot:
+	header_start:
+		dd multiboot_magic
+		dd 0
+		dd header_end - header_start
+		dd 0x100000000 - (multiboot_magic + 0 + (header_end - header_start))
+
+		; Information tag
+		align 8
+		dw 1
+		dw 1
+		dd 24
+		dd 2 ; bootloader name
+		dd 4 ; meminfo
+		dd 6 ; mmap
+		dd 13 ; smbios
+
+		; Empty tag
+		align 8
+		dw 0
+		dw 0
+		dd 8
+	header_end:
+
+	global boot
+	;extern kernel_main
+	boot:
+		mov esp, stack_top
+		push esp
+		push ebx
+		push eax
+		cli
+		;call kernel_main
+		hlt
+		jmp $
+
+section .bss
+	align 32
+	stack_bottom:
+		resb kernel_stack
+	stack_top: