[prev] 38 [next]

Argc and Argv (cont)

Code to print the program's name (argv[0]): 

   # assume argc is $s0, argv is $s1
   addi   $t0, $s1, 0    # &argv[0]
   lw     $a0, ($t0)     # argv[]
   li     $v0, 4
   syscall

Code to print the first cmd-line arg (argv[1]) 

   # assume argc is $s0, argv is $s1
   addi   $t0, $s1, 4    # &argv+4
   lw     $a0, ($t0)     # argv[]
   li     $v0, 4
   syscall