Data update

Task/Hello-world-Text/AArch64-Assembly/hello-world-text-2.aarch64

@@ -0,0 +1,16 @@
+.global _start
+
+.text
+_start:
+    mov x8, #64             //64 is write
+    mov x0, #1              //1 is stdout
+    adr x1, msg             //mov address of msg into x1
+    mov x2, #(msgend - msg) //msgend minus msg is the length of message
+    svc #0                  //system call
+    mov x8, #93             //93 is exit
+    mov x0, xzr             //0 is the exit code. xzr is the zero register
+    svc #0                  //system call
+
+msg:
+    .ascii "Hello world!\n"
+msgend:

Task/Hello-world-Text/AArch64-Assembly/hello-world-text-3.aarch64

@@ -0,0 +1,21 @@
+.global _start
+.text
+_start:
+    adr  x0, msg       // load x0 with address of message
+    bl   writez        // call the function that writes null-terminated string to stdout
+    mov  x8, #93       // 93 is syscall exit
+    mov  x0, xzr       // exit code = 0. Exit normal.
+    svc  #0            // syscall
+                       // If using as a function in C declare it as
+writez:                // extern long writez(char *str);
+    mov  x1, x0        // address of str needs to be in x1 for syscall
+    sub  x0, x0, #1    // decrement x0, because the next statement increments it.
+ 0: ldrb w2, [x0, #1]! // increment x0, load byte value at x0 in w2
+    cbnz w2, 0b        // if w2 is not zero jump back to 0: label
+    sub  x2, x0, x1    // subtract x1 from x0, load into x2. length of str
+    mov  x0, #1        // mov into x0 1. stdout
+    mov  x8, #64       // mov into x8 64. write
+    svc  #0            // syscall
+    ret                // return from function.
+                       // return value (x0) is number of characters written.
+msg: .asciz "Hello world!\n" // .asciz means null-terminated string. Assembler adds the 0