some changes, waiting on prs for the rest

src/boot/missing_gcc_functions.c

@@ -66,3 +66,23 @@ f32 __floatundisf(u32 c) {
 f64 __floatundidf(u32 c) {
     return (f64)c;
 }
+
+f32 __powisf2(f32 a, s32 b) {
+    const s32 recip = b < 0;
+    f32 r = 1;
+    
+    while (1) {
+        if (b & 1) {
+            r *= a;
+        }
+
+        b /= 2;
+
+        if (b == 0) {
+            break;
+        }
+
+        a *= a;
+    }
+    return recip ? 1/r : r;
+}

src/overlays/actors/ovl_En_Zf/z_en_zf.c

@@ -452,9 +452,15 @@ s16 EnZf_FindNextPlatformAwayFromPlayer(Vec3f* pos, s16 curPlatform, s16 arg2, G
         }
     }
 
-    // These functions have no side effects, so these two calls do nothing
+    //! @bug `altNextPlatform` can be -1 in certain conditions and cause an out of bounds access.
+    //! Under normal conditions, this doesn't cause problems because the data before `sPlatformPositions`
+    //! is section padding between .text and .data, so 0 gets read as a float.
+    //! Other compilers can shift things and result in a crash. Defining `AVOID_UB` will remove these function calls
+    //! entirely as they are dead code and do not have any effect.
+    #ifndef AVOID_UB
     Math_Vec3f_DistXYZ(&player->actor.world.pos, &sPlatformPositions[nextPlatform]);
     Math_Vec3f_DistXYZ(&player->actor.world.pos, &sPlatformPositions[altNextPlatform]);
+    #endif
 
     if (altNextPlatform > 0) {
         s16 nextPlatformToPlayerYaw =