NASM: `loader.s : 8: error: parser: instruction expected`

Question

我正在尝试使用 NASM 进行一些低级编程。我知道相当多的 Assembly，并且尝试编译我认为完美的代码会导致： loader.s:8 : error: parser: instruction expected 这里有什么问题？这是我的代码：

global loader                    ; the entry symbol of the program

MAGIC_NUMBER equ 0x1BADB002      ; define the magic number constant
FLAGS        equ 0x0             ; multiboot flags
CHECKSUM     equ -MAGIC_NUMBER   ; calculate the checksum
                                 ; (magic number + checksum + flags should equal 0)

KERNEL_STACK SIZE equ 4096       ; size of stack (4096 bytes or four kilobytes)

section .bss                     ; bss section for uninitialized values
align 4                          ; the code must be aligned by 4 bytes
kernel_stack:                    ; label points to the beginnning of memory
    resb KERNEL_STACK_SIZE       ; reserve stack for the kernel

section .text                    ; the text section is where code is run
align 4                          ; the code must be aligned by 4 bytes
    dd MAGIC_NUMBER              ; write the magic number to the machine code,
    dd FLAGS                     ; the flags number,
    dd CHECKSUM                  ; the checksum too

  loader:                        ; the loader label, where the programstarts executing
  mov eax, 0xCAFEBABE          ; move the value 0xCAFEBABE to EAX
  mov esp, kernel_stack + KERNEL_STACK_SIZE ;point kernel to top of stack
 .loop:
    jmp .loop ; loop forever (since this is a kernel, and it has to)

Answer 1

打字错误。 KERNEL_STACK SIZE中不能有space。

NASM: `loader.s : 8: error: parser: instruction expected`

NASM: `loader.s : 8: error: parser: instruction expected`

assembly

x86

kernel

nasm

osdev