Complete single file cat

src/args.S

@@ -29,7 +29,7 @@ fetch_argv:
     addi sp, sp, -16
     sd ra, 8(sp)
     sd s0, 0(sp)
-    call fetch_argc
+    call fetch_argc # get argument count
     ld ra, 8(sp)
     ld s0, 0(sp)
     addi sp, sp, 16
@@ -47,14 +47,14 @@ fetch_argv:
     sd ra, 16(sp)
     sd s1, 8(sp)
     sd s0, 0(sp)
-    call _next_argv
+    call _next_argv # grab the next argument
     ld ra, 16(sp)
     ld s1, 8(sp)
     ld s0, 0(sp)
     addi sp, sp, 24
     mv a0, a1
     addi s1, s1, 1
-    bne s1, s0, 1b
+    bne s1, s0, 1b # if we haven't retrieved the requested argument, go again
     
     j 3f
 
@@ -68,7 +68,7 @@ fetch_argv:
     sd s0, 0(sp)
 
     mv a0, a1
-    call _argv_size
+    call _argv_size # grab the size of the retrieved argument
 
     ld ra, 8(sp)
     ld s0, 0(sp)