/* ARM assembly AARCH64 Raspberry PI 3B */
/*  program nullobj64.s   */

/*******************************************/
/* Constantes file                         */
/*******************************************/
/* for this file see task include a file in language AArch64 assembly*/
.include "../includeConstantesARM64.inc"
/*******************************************/
/* Initialized data                        */
/*******************************************/
.data
szCarriageReturn:       .asciz "\n"
szMessResult:           .asciz "Value is null.\n"     // message result

qPtrObjet:              .quad 0                       // objet pointer
/*******************************************/
/* UnInitialized data                      */
/*******************************************/
.bss
/*******************************************/
/*  code section                           */
/*******************************************/
.text
.global main
main:                                                // entry of program

    ldr x0,qAdrqPtrObjet                             // load pointer address
    ldr x0,[x0]                                      // load pointer value
    cbnz x0,100f                                     // is null ?
    ldr x0,qAdrszMessResult                          // yes -> display message
    bl affichageMess

100:                                                 // standard end of the program
    mov x0,0                                         // return code
    mov x8,EXIT                                      // request to exit program
    svc 0                                            // perform the system call

qAdrszMessResult:        .quad szMessResult
qAdrszCarriageReturn:    .quad szCarriageReturn
qAdrqPtrObjet:           .quad qPtrObjet
/********************************************************/
/*        File Include fonctions                        */
/********************************************************/
/* for this file see task include a file in language AArch64 assembly */
.include "../includeARM64.inc"