;****Convert the following 32 bit program to 64 bit with the same output****

; nasm -f elf32 P5a.asm && gcc -m32 -o P5a P5a.o -->32bit will compile

extern printf extern strlen

section .data msg db "Testing:",0xA,0x0 len equ $ - msg msg2 db "The length is: ",0x0 len2 equ $ - msg2 fmt db "%s",0xA,0x0 lfmt equ $ -fmt fmt2 db "%u",0xA,0x0 lfmt2 equ $ - fmt2

t1 db "This is a test.",0x0 l1 equ $ - t1 t2 db "Newline test.",0xA,0x0 l2 equ $ - t2 t3 db 0xA,0x0 l3 equ $ - t3 t4 db 0x0 l4 equ $ - t4

section .bss ta resd 4 retv resd 1

section .text global main

main: push ebp ; Save stack frame pointer mov ebp, esp ; Setup a stack frame

; Setup tests mov dword [ta], t1 ; 0 mov dword [ta+4], t2 ; 1 mov dword [ta+8], t3 ; 2 mov dword [ta+12], t4 ; 3 mov ecx, 3

loop: mov esi, [ta+ecx*4] push ecx ; Save ECX from potential clobbering

; printf(msg) push dword msg ; Push the argument into the stack call printf ; Call the function add esp, byte 4 ; Clean the stack

; printf("%s ",ta) push esi ; Push the argument into the stack push dword fmt ; Push the argument into the stack call printf ; Call the function add esp, byte 8 ; Clean the stack ; retv = strlen(ta) push esi ; Push the argument into the stack call strlen ; Call the function add esp, byte 4 ; Clean the stack mov [retv], eax ; Save return value

; printf(msg2) push dword msg2 ; Push the argument into the stack call printf ; Call the function add esp, byte 4 ; Clean the stack

; printf("%u ",retv) push dword [retv] ; Push the argument into the stack push dword fmt2 ; Push the argument into the stack call printf ; Call the function add esp, byte 8 ; Clean the stack

pop ecx dec ecx ; Decrement counter jns loop ; Jump while non-negative

mov esp, ebp ; Undo stack frame pop ebp ; Restore stack frame pointer

mov eax, 0 ; main() return value ret

;*****************************************************************************************************

;***********64 bit sample code

;RULE: You cannot change section .data in P5a_64.asm

; nasm -f elf64 P5a_64.asm && gcc -m64 -o P5a_64 P5a_64.o ->must compile

extern printf extern strlen

section .data msg db "Testing:",0xA,0x0 len equ $ - msg msg2 db "The length is: ",0x0 len2 equ $ - msg2 fmt db "%s",0xA,0x0 lfmt equ $ -fmt fmt2 db "%u",0xA,0x0 lfmt2 equ $ - fmt2

t1 db "This is a test.",0x0 l1 equ $ - t1 t2 db "Newline test.",0xA,0x0 l2 equ $ - t2 t3 db 0xA,0x0 l3 equ $ - t3 t4 db 0x0 l4 equ $ - t4

section .bss ; add your bss section data here

section .text global main

main: ; add your main code here

; some kind of loop, for every test message ; printf(msg) ; printf("%s ",ta) ; retv = strlen(ta) ; printf(msg2) ; printf("%u ",retv)