rename "limitations" to "quirks", less negative

book/src/01-limitations/00-index.md

@@ -1,10 +0,0 @@
-# GBA Limitations
-
-There's a lot of seemingly normal Rust code that you can't write when compiling
-for the GBA.
-
-I mean there's a lot of stuff that you _can_ write, but we don't wanna get
-tripped up by assuming we can use something only to get stuck when it's missing.
-
-We'll start the book by reviewing all the major things we don't have so that we
-can avoid any surprises later.

book/src/01-quirks/00-index.md

@@ -0,0 +1,9 @@
+# Quirks
+
+The GBA supports a lot of totally normal Rust code exactly like you'd think.
+
+However, it also is missing a lot of what you might expect, and sometimes we
+have to do things in slightly weird ways.
+
+We start the book by covering the quirks our code will have, just to avoid too
+many surprises later.

book/src/01-quirks/01-no_std.md

@@ -89,6 +89,10 @@ the standard library types to be used "for free" once it was set up, or just a
 custom allocator that's GBA specific if Rust's global allocator style isn't a
 good fit for the GBA (I honestly haven't looked into it).
 
+## LLVM Intrinsics
+
+TODO: explain that we'll occasionally have to provide some intrinsics.
+
 ## Bare Metal Panic
 
 TODO: expand this

book/src/SUMMARY.md

@@ -8,10 +8,10 @@
   * [Hello, Magic](00-introduction/04-hello-magic.md)
   * [Newtype](00-introduction/05-newtype.md)
   * [Help and Resources](00-introduction/06-help_and_resources.md)
-* [Limitations](01-limitations/00-index.md)
-  * [No Std](01-limitations/01-no_std.md)
-  * [Fixed Only](01-limitations/02-fixed_only.md)
-  * [Volatile Destination](01-limitations/03-volatile_destination.md)
+* [Quirks](01-quirks/00-index.md)
+  * [No Std](01-quirks/01-no_std.md)
+  * [Fixed Only](01-quirks/02-fixed_only.md)
+  * [Volatile Destination](01-quirks/03-volatile_destination.md)
 * [Concepts](02-concepts/00-index.md)
   * [CPU](02-concepts/01-cpu.md)
   * [BIOS](02-concepts/02-bios.md)