diff --git a/.travis/calcrom/calcrom.pl b/.travis/calcrom/calcrom.pl
index 9eff1c064..9c4867929 100755
--- a/.travis/calcrom/calcrom.pl
+++ b/.travis/calcrom/calcrom.pl
@@ -1,5 +1,7 @@
 #!/usr/bin/perl
 
+use IPC::Cmd qw[ run ];
+
 (@ARGV == 1)
     or die "ERROR: no map file specified.\n";
 open(my $file, $ARGV[0])
@@ -7,7 +9,6 @@ open(my $file, $ARGV[0])
 
 my $src = 0;
 my $asm = 0;
-my $undocumented = 0;
 while (my $line = <$file>)
 {
     if ($line =~ /^ \.(\w+)\s+0x[0-9a-f]+\s+(0x[0-9a-f]+) (\w+)\/.+\.o/)
@@ -28,19 +29,92 @@ while (my $line = <$file>)
             }
         }
     }
-    if($line =~ /^\s+0x([0-9A-f]+)\s+[A-z_]+([0-9A-f]+)/) {
-        my $thing1 = sprintf("%08X", hex($1));
-        my $thing2 = sprintf("%08X", hex($2));
-        if($thing1 eq $thing2) {
-            $undocumented += 1;
-        }
-    }
 }
 
+# Note that the grep filters out all branch labels. It also requires a minimum
+# line length of 5, to filter out a ton of generated symbols (like AcCn). No
+# settings to nm seem to remove these symbols. Finally, nm prints out a separate
+# entry for whenever a name appears in a file, not just where it's defined. uniq
+# removes all the duplicate entries.
+#
+#
+# You'd expect this to take a while, because of uniq. It runs in under a second,
+# though. Uniq is pretty fast!
+my $base_cmd = "nm pokeemerald.elf | awk '{print \$3}' | grep '^[^_].\\{4\\}' | uniq";
+
+# This looks for Unknown_, Unknown_, or sub_, followed by just numbers. Note that
+# it matches even if stuff precedes the unknown, like sUnknown/gUnknown.
+my $undoc_cmd = "grep '[Uu]nknown_[0-9a-fA-F]*\\|sub_[0-9a-fA-F]*'";
+
+# This looks for every symbol with an address at the end of it. Some things are
+# given a name based on their type / location, but still have an unknown purpose.
+# For example, FooMap_EventScript_FFFFFFF.
+my $partial_doc_cmd = "grep '[0-9a-fA-F]\\{6,7\\}'";
+
+my $count_cmd = "wc -l";
+
+# It sucks that we have to run this three times, but I can't figure out how to get
+# stdin working for subcommands in perl while still having a timeout. It's decently
+# fast anyway.
+my $total_syms_as_string;
+(run (
+    command => "$base_cmd | $count_cmd",
+    buffer => \$total_syms_as_string,
+    timeout => 60
+))
+    or die "ERROR: Error while getting all symbols: $?";
+
+my $undocumented_as_string;
+(run (
+    command => "$base_cmd | $undoc_cmd | $count_cmd",
+    buffer => \$undocumented_as_string,
+    timeout => 60
+))
+    or die "ERROR: Error while filtering for undocumented symbols: $?";
+
+my $partial_documented_as_string;
+(run (
+    command => "$base_cmd | $partial_doc_cmd | $count_cmd",
+    buffer => \$partial_documented_as_string,
+    timeout => 60
+))
+    or die "ERROR: Error while filtering for partial symbols: $?";
+
+# Performing addition on a string converts it to a number. Any string that fails
+# to convert to a number becomes 0. So if our converted number is 0, but our string
+# is nonzero, then the conversion was an error.
+my $undocumented = $undocumented_as_string + 0;
+(($undocumented != 0) and ($undocumented_as_string ne "0"))
+    or die "ERROR: Cannot convert string to num: '$undocumented_as_string'";
+
+my $partial_documented = $partial_documented_as_string + 0;
+(($partial_documented != 0) and ($partial_documented_as_string ne "0"))
+	or die "ERROR: Cannot convert string to num: '$partial_documented_as_string'";
+
+my $total_syms = $total_syms_as_string + 0;
+(($total_syms != 0) and ($total_syms_as_string ne "0"))
+    or die "ERROR: Cannot convert string to num: '$total_syms_as_string'";
+
+($total_syms != 0)
+    or die "ERROR: No symbols found.";
+
 my $total = $src + $asm;
 my $srcPct = sprintf("%.4f", 100 * $src / $total);
 my $asmPct = sprintf("%.4f", 100 * $asm / $total);
+
+# partial_documented is double-counting the unknown_* and sub_* symbols.
+$partial_documented = $partial_documented - $undocumented;
+
+my $documented = $total_syms - ($undocumented + $partial_documented);
+my $docPct = sprintf("%.4f", 100 * $documented / $total_syms);
+my $partialPct = sprintf("%.4f", 100 * $partial_documented / $total_syms);
+my $undocPct = sprintf("%.4f", 100 * $undocumented / $total_syms);
+
 print "$total total bytes of code\n";
 print "$src bytes of code in src ($srcPct%)\n";
 print "$asm bytes of code in asm ($asmPct%)\n";
-print "$undocumented global symbols undocumented\n";
+print "\n";
+print "$total_syms total symbols\n";
+print "$documented symbols documented ($docPct%)\n";
+print "$partial_documented symbols partially documented ($partialPct%)\n";
+print "$undocumented symbols undocumented ($undocPct%)\n";