edemkay

I am new to the assembly world i tried to combined the C and assembly code below.
. How do i run (compile both) and how do i access an array if sent as parameter to the assemly part.
Thanks
#include <stdio.h>

extern int add_num(int num1, int num2);

int main()
{
printf("Sum: %d\n" ,add_num(22, 33));
return 0;
}

/*Assembly part*/
global add_num
add_num:
push ebp ; save ebp register
mov ebp, esp ; get current stack pointer
push ebx ; save ebx register
mov ebx, [ebp + 8] ; get second parameter
mov eax, [ebp + 12] ; get first parameter
add eax, ebx ; add numbers,store sum in eax, return value
pop ebx ; restore ebx
pop ebp ; restore ebp
ret ; return to caller

/*Make file*/

main :addNum
gcc -o main caller.c addNum.o
addNum :addNum.asm
nasm -felf -o addNum.o addNum.asm

DaWei

Please read the forum's rules/FAQ and the "How to Post a Question" thread at the top of the C forum.

__________________
Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code.
Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers