Jump to specific line in x86 assembly language

assembly, masm, x86

Solution

You can just put a label at that line. Depending on your assembly language dialect, you might be be able to use a numeric local label, or you might need to use symbolic labels. A possible example follows. I have only NASM here to test, so I'm not really sure this example will map well to MASM, but you should get the idea:

start:
    jmp .line3
    mov ax, 0
.line3:
    mov bx, 0
    mov ah, 1

NASM uses a leading `.` to identify local labels.

Problem

In x86 assembly language, is it possible to specify a jump to a specific line number? Here, I'm trying to use the `jmp` instruction to the line number 3. (I don't yet know of a way to pass a label as a parameter to a function, so I'm trying to use a line number instead of a label in this case.) ``` .686p .model flat,stdcall .stack 2048 .data ExitProcess proto, exitcode:dword .code start: jmp 3; this produces the error shown below mov ax, 0 mov bx, 0 mov ah, 1 invoke ExitProcess, 0 end start ``` The code above produces the error `1>p4.asm(11): error A2076: jump destination must specify a label`.

Original source