ada_sum.asm

;; ada_sum.asm

segment     .text
            global      ada_sum

ada_sum:

            ;; Make room for the local variable sum ...
            enter       4, 0

            ;; Push ebx on the stack, following C calling convention ...
            push        ebx

            ;; Initialize the value of sum [ebp-4] to 0 ...
            mov         dword [ebp-4], 0

            ;; Add the value of a [ebp+12] to the value of sum [ebp-4] ...
            mov         ebx, [ebp+12]
            add         [ebp-4], ebx 

            ;; Add the value of b [ebp+8] to the value of sum [ebp-4] ...
            mov         ebx, [ebp+8]
            add         [ebp-4], ebx 

            ;; Move the value of sum [ebp-4] into eax ...
            mov         eax, [ebp-4]

            ;; Pop ebx out of the stack ...
            pop         ebx

            ;; Pop sum out of the stack ...
            leave

            ;; Then return to the caller ...
            ret