Add stdin cat

src/args.S

@@ -107,9 +107,9 @@ has_switch:
     mv s1, a1
 
     call fetch_argc
-    bnez a0, 1f
+    bnez a0, .LHasSwitchNoParse
     li t0, 2
-    blt a1, t0, 1f # if we have no commands other than the binary, we know there will be no switches
+    blt a1, t0, .LSwitchNotFoundNoParse # if we have no commands other than the binary, we know there will be no switches
 
     addi sp, sp, -24
     sd s4, 16(sp)
@@ -118,7 +118,7 @@ has_switch:
     li s2, 1 # load first non-base command arg
     mv s4, a1 # put argc in s4
     
-    2:
+    .LSwitchProcessNextArg:
     mv a0, s2
     call fetch_argv
     mv s3, a1 # save argv buff addr
@@ -126,32 +126,37 @@ has_switch:
     mv a0, s3 # load argv buff addr into a0 (string 0)
     mv a1, s0 # move switch ptr 1 addr into a1 (string 1)
     call _str_cmp
-    bnez a1, 5f # if the strings match, exit loop
+    bnez a1, .LSwitchFound # if the strings match, exit loop
 
     mv a0, s3 # move argv buff addr into a0 (string 0)
     mv a1, s1 # move switch ptr 2 addr into a1 (string 1)
     call _str_cmp
-    bnez a1, 5f # if the strings match, exit loop
+    bnez a1, .LSwitchFound # if the strings match, exit loop
 
     addi s2, s2, 1 # if string doesn't match we inc to the next arg
-    blt s2, s4, 2b # keep going while we have untested args
+    blt s2, s4, .LSwitchProcessNextArg # keep going while we have untested args
     
-    4:
+    .LSwitchNotFound:
     li a0, 0
     li a1, 0
-    j 3f
+    j .LSwitchFreeSP
 
-    5:
+    .LSwitchNotFoundNoParse:
+    li a0, 0
+    li a1, 0
+    j .LHasSwitchNoParse
+
+    .LSwitchFound:
     li a0, 0
     li a1, 1
 
-    3:
+    .LSwitchFreeSP:
     ld s3, 0(sp)
     ld s2, 8(sp)
     ld s4, 16(sp)
     addi sp, sp, 24
 
-    1:
+    .LHasSwitchNoParse:
     ld ra, 16(sp)
     ld s1, 8(sp)
     ld s0, 0(sp)