esc_tex.s

    .syntax unified  
      
        @ --------------------------------  
    .global main  
    main:  
        @ Stack the return address (lr) in addition to a dummy register (ip) to  
        @ keep the stack 8-byte aligned.  
        push    {ip, lr}  
      
        @ Load the argument and perform the call. This is like 'printf("...")' in C.  
        ldr     r0, =message  
        bl      printf  
      
        @ Exit from 'main'. This is like 'return 0' in C.  
        mov     r0, #0    @ Return 0.  
      
        @ Pop the dummy ip to reverse our alignment fix, and pop the original lr  
        @ value directly into pc — the Program Counter — to return.  
        pop     {ip, pc}  
      
        @ --------------------------------  
        @ Data for the printf calls. The GNU assembler's ".asciz" directive  
        @ automatically adds a NULL character termination.  
    message:  
        .asciz "vamos within temptation.\n"