我正在尝试在 linux ubuntu 32 位中编译汇编代码。但是当我编译它时，nasm -felf32 assembly.asm && gcc assembly.o && ./a.out
我面对的是Segmentation fault (core dumped). 我知道问题出在 printf 上。
我在网上搜索了很多，有几个这样的问题。但没有一个答案对我有用。
global main
extern printf
section .text
main:
push ebx ; we have to save this since we use it
mov ecx, 90 ; ecx will countdown to 0
xor eax, eax ; rax will hold the current number
xor ebx, ebx ; rbx will hold the next number
inc ebx ; rbx is originally 1
print:
; We need to call printf, but we are using rax, rbx, and rcx. printf
; may destroy rax and rcx so we will save these before the call and
; restore them afterwards.
push eax ; caller-save register
push ecx ; caller-save register
mov edi, format ; set 1st parameter (format)
mov esi, eax ; set 2nd parameter (current_number)
xor eax, eax ; because printf is varargs
; Stack is already aligned because we pushed three 8 byte registers
call printf ; printf(format, current_number)
pop ecx ; restore caller-save register
pop eax ; restore caller-save register
mov edx, eax ; save the current number
mov eax, ebx ; next number is now current
add ebx, edx ; get the new next number
dec ecx ; count down
jnz print ; if not done counting, do some more
pop ebx ; restore rbx before returning
ret
format:
db "%20ld", 10, 0
*** 源代码是从Nasm 教程站点复制的。它用于打印斐波那契数。