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Static vs Automatic Allocation

Static allocation:
  • uninitialised memory allocated at compile/assemble-time,(global variables) e.g. 

    int  val;              val: .space 4
char str[20];          str: .space 20
int  vec[20];          vec: .space 80

  • initialised memory allocated at compile/assemble-time, e.g. 

    int val = 5;                 val: .word 5
int arr[4] = {9,8,7,6};      arr: .word 9, 8, 7, 6
char msg[] = "Hello\n";       msg: .asciiz "Hello\n"