diff options
Diffstat (limited to 'example/mb2/entry.asm')
| -rw-r--r-- | example/mb2/entry.asm | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/example/mb2/entry.asm b/example/mb2/entry.asm new file mode 100644 index 0000000..063ac74 --- /dev/null +++ b/example/mb2/entry.asm @@ -0,0 +1,51 @@ +; MIT License, Copyright (c) 2021 Marvin Borner + +bits 32 + +MAGIC equ 0xe85250d6 +ARCHITECHTURE equ 0 +HEADER_LENGTH equ multiboot_header_end - multiboot_header_start +CHECKSUM equ 0x100000000 - (MAGIC + ARCHITECHTURE + HEADER_LENGTH) + +multiboot_header_start: + dd MAGIC + dd ARCHITECHTURE + dd HEADER_LENGTH + dd CHECKSUM +entry_address_tag_start: + dw 3 + dw 0 + dd entry_address_tag_end - entry_address_tag_start + dd 0 ; low + dd boot_entry ; high +entry_address_tag_end: +framebuffer_tag_start: + dw 5 + dw 0 + dd framebuffer_tag_end - framebuffer_tag_start + dd 1920 + dd 1200 + dd 32 +framebuffer_tag_end: + dw 0 + dw 0 + dd 8 +multiboot_header_end: + +global boot_entry +extern kernel_main +boot_entry: + mov esp, stack_top + push esp + push ebx + push eax + cli + call kernel_main + hlt + jmp $ + +section .bss +align 32 +stack_bottom: + resb 0x4000 +stack_top: |