从程序集调用printf-不起作用

Question

Well.. i've tried a few things but I can't get this to work.

How do I push the address of _hello correctly for the printf() function?

.intel_syntax noprefix

.extern printf

.global printf2

_hello: .ascii  "Hello World!\0"

printf2:
    push ebp
    mov ebp, esp

    push _hello
    call _printf

    pop ebp
    ret

With " not working " I mean that the program simply crashes.

Answer 1

I could not identify which OS you use.

This is correct for MinGW-GAS for Windows:

.intel_syntax noprefix

.extern _printf
.global _printf2

_hello: .ascii  "Hello World!\0"

_printf2:
    push ebp
    mov ebp, esp

    push OFFSET _hello
    call _printf
    add esp, 4

    pop ebp
    ret

And this one is for Linux-GAS:

.intel_syntax noprefix

.extern printf
.global printf2

_hello: .ascii  "Hello World!\0"

printf2:
    push ebp
    mov ebp, esp

    push OFFSET _hello
    call printf
    add esp, 4

    pop ebp
    ret

Consider the different use of the underscores!