diff --git a/soh/include/functions.h b/soh/include/functions.h
index b3e59779184..97e3be4d99b 100644
--- a/soh/include/functions.h
+++ b/soh/include/functions.h
@@ -2267,7 +2267,7 @@ void __osMallocInit(Arena* arena, void* start, size_t size);
 void __osMallocAddBlock(Arena* arena, void* start, ptrdiff_t size);
 void ArenaImpl_RemoveAllBlocks(Arena* arena);
 void __osMallocCleanup(Arena* arena);
-u8 __osMallocIsInitalized(Arena* arena);
+s32 __osMallocIsInitialized(Arena* arena);
 void __osMalloc_FreeBlockTest(Arena* arena, ArenaNode* node);
 void* __osMalloc_NoLockDebug(Arena* arena, size_t size, const char* file, s32 line);
 void* __osMallocDebug(Arena* arena, size_t size, const char* file, s32 line);
@@ -2284,7 +2284,7 @@ void* __osReallocDebug(Arena* arena, void* ptr, size_t newSize, const char* file
 void ArenaImpl_GetSizes(Arena* arena, u32* outMaxFree, u32* outFree, u32* outAlloc);
 void __osDisplayArena(Arena* arena);
 void ArenaImpl_FaultClient(Arena* arena);
-u32 __osCheckArena(Arena* arena);
+s32 __osCheckArena(Arena* arena);
 u8 func_800FF334(Arena* arena);
 s32 PrintUtils_VPrintf(PrintCallback* pfn, const char* fmt, va_list args);
 s32 PrintUtils_Printf(PrintCallback* pfn, const char* fmt, ...);
@@ -2408,7 +2408,7 @@ OSThread* __osGetCurrFaultedThread(void);
 u32* osViGetCurrentFramebuffer(void);
 s32 __osSpSetPc(void* pc);
 f32 absf(f32);
-void* func_801068B0(void* dst, void* src, size_t size);
+void* oot_memmove(void* dest, const void* src, size_t len);
 void Message_UpdateOcarinaGame(PlayState* play);
 u8 Message_ShouldAdvance(PlayState* play);
 u8 Message_ShouldAdvanceSilent(PlayState* play);
diff --git a/soh/include/z64.h b/soh/include/z64.h
index 903805f8c9a..cd66089a8f6 100644
--- a/soh/include/z64.h
+++ b/soh/include/z64.h
@@ -2038,13 +2038,13 @@ typedef struct ArenaNode {
     /* 0x04 */ size_t size;
     /* 0x08 */ struct ArenaNode* next;
     /* 0x0C */ struct ArenaNode* prev;
-    ///* 0x10 */ const char* filename;
-    ///* 0x14 */ s32 line;
-    ///* 0x18 */ OSId threadId;
-    ///* 0x1C */ Arena* arena;
-    ///* 0x20 */ OSTime time;
-    ///* 0x28 */ u8 unk_28[0x30-0x28]; // probably padding
-} ArenaNode; // size = 0x10
+    // /* 0x10 */ const char* filename;
+    // /* 0x14 */ s32 line;
+    // /* 0x18 */ OSId threadId;
+    // /* 0x1C */ Arena* arena;
+    // /* 0x20 */ OSTime time;
+    // /* 0x28 */ u8 unk_28[0x30-0x28]; // probably padding
+} ArenaNode; // size = 0x30
 
 typedef struct OverlayRelocationSection {
     /* 0x00 */ u32 textSize;
diff --git a/soh/src/code/__osMalloc.c b/soh/src/code/__osMalloc.c
index 1604332b74e..895de5fd954 100644
--- a/soh/src/code/__osMalloc.c
+++ b/soh/src/code/__osMalloc.c
@@ -3,61 +3,132 @@
 
 #include <string.h>
 
-#define FILL_ALLOCBLOCK (1 << 0)
-#define FILL_FREEBLOCK (1 << 1)
-#define CHECK_FREE_BLOCK (1 << 2)
+// SOH [General] This file corresponds to decomp's "__osMalloc_gc.c", there's currently no file corresponding to decomp's "__osMalloc_n64.c"
 
-#define NODE_MAGIC (0x7373)
+// #region SOH [General] We currently don't set OOT_DEBUG when building so set it here manually
+#define OOT_DEBUG 1
+// #endregion
 
-#define BLOCK_UNINIT_MAGIC (0xAB)
-#define BLOCK_UNINIT_MAGIC_32 (0xABABABAB)
-#define BLOCK_ALLOC_MAGIC (0xCD)
-#define BLOCK_ALLOC_MAGIC_32 (0xCDCDCDCD)
-#define BLOCK_FREE_MAGIC (0xEF)
-#define BLOCK_FREE_MAGIC_32 (0xEFEFEFEF)
+// #region SOH [General] We renamed OoT's memmove to prevent conflicts with the libc version
+#define memmove oot_memmove
+// #endregion
+
+#define FILL_ALLOC_BLOCK_FLAG (1 << 0)
+#define FILL_FREE_BLOCK_FLAG (1 << 1)
+#define CHECK_FREE_BLOCK_FLAG (1 << 2)
+
+#define NODE_MAGIC 0x7373
+
+#define BLOCK_UNINIT_MAGIC 0xAB
+#define BLOCK_UNINIT_MAGIC_32 0xABABABAB
+#define BLOCK_ALLOC_MAGIC 0xCD
+#define BLOCK_ALLOC_MAGIC_32 0xCDCDCDCD
+#define BLOCK_FREE_MAGIC 0xEF
+#define BLOCK_FREE_MAGIC_32 0xEFEFEFEF
+
+#define NODE_IS_VALID(node) (((node) != NULL) && ((node)->magic == NODE_MAGIC))
+
+#if OOT_DEBUG
+
+#define NODE_GET_NEXT(node) ArenaImpl_GetNextBlock(node)
+#define NODE_GET_PREV(node) ArenaImpl_GetPrevBlock(node)
+
+#define SET_DEBUG_INFO(node, file, line, arena) ArenaImpl_SetDebugInfo(node, file, line, arena)
+
+#define FILL_UNINIT_BLOCK(arena, node, size) memset(node, BLOCK_UNINIT_MAGIC, size)
+
+#define FILL_ALLOC_BLOCK(arena, alloc, size)   \
+    if ((arena)->flag & FILL_ALLOC_BLOCK_FLAG) \
+    memset(alloc, BLOCK_ALLOC_MAGIC, size)
+
+#define FILL_FREE_BLOCK_HEADER(arena, node)   \
+    if ((arena)->flag & FILL_FREE_BLOCK_FLAG) \
+    memset(node, BLOCK_FREE_MAGIC, sizeof(ArenaNode))
+
+#define FILL_FREE_BLOCK_CONTENTS(arena, node) \
+    if ((arena)->flag & FILL_FREE_BLOCK_FLAG) \
+    memset((void*)((uintptr_t)(node) + sizeof(ArenaNode)), BLOCK_FREE_MAGIC, (node)->size)
+
+#define CHECK_FREE_BLOCK(arena, node)          \
+    if ((arena)->flag & CHECK_FREE_BLOCK_FLAG) \
+    __osMalloc_FreeBlockTest(arena, node)
+
+#define CHECK_ALLOC_FAILURE(arena, ptr) (void)0
+
+#else
+
+#define NODE_GET_NEXT(node) (NODE_IS_VALID((node)->next) ? (node)->next : NULL)
+#define NODE_GET_PREV(node) (NODE_IS_VALID((node)->prev) ? (node)->prev : NULL)
+
+#define SET_DEBUG_INFO(node, file, line, arena) (void)0
+#define FILL_UNINIT_BLOCK(arena, node, size) (void)0
+#define FILL_ALLOC_BLOCK(arena, alloc, size) (void)0
+#define FILL_FREE_BLOCK_HEADER(arena, node) (void)0
+#define FILL_FREE_BLOCK_CONTENTS(arena, node) (void)0
+#define CHECK_FREE_BLOCK(arena, node) (void)0
+
+// Number of allocation failures across all arenas.
+u32 gTotalAllocFailures = 0; // "Arena_failcnt"
+
+#define CHECK_ALLOC_FAILURE(arena, ptr) \
+    do {                                \
+        if ((ptr) == NULL) {            \
+            gTotalAllocFailures++;      \
+            (arena)->allocFailures++;   \
+        }                               \
+    } while (0)
+
+#endif
 
 OSMesg sArenaLockMsg;
+
+void __osMallocAddBlock(Arena* arena, void* start, ptrdiff_t size);
+
+#if OOT_DEBUG
 u32 __osMalloc_FreeBlockTest_Enable;
 
 u32 ArenaImpl_GetFillAllocBlock(Arena* arena) {
-    return (arena->flag & FILL_ALLOCBLOCK) != 0;
+    return (arena->flag & FILL_ALLOC_BLOCK_FLAG) != 0;
 }
 u32 ArenaImpl_GetFillFreeBlock(Arena* arena) {
-    return (arena->flag & FILL_FREEBLOCK) != 0;
+    return (arena->flag & FILL_FREE_BLOCK_FLAG) != 0;
 }
 u32 ArenaImpl_GetCheckFreeBlock(Arena* arena) {
-    return (arena->flag & CHECK_FREE_BLOCK) != 0;
+    return (arena->flag & CHECK_FREE_BLOCK_FLAG) != 0;
 }
 
 void ArenaImpl_SetFillAllocBlock(Arena* arena) {
-    arena->flag |= FILL_ALLOCBLOCK;
+    arena->flag |= FILL_ALLOC_BLOCK_FLAG;
 }
 void ArenaImpl_SetFillFreeBlock(Arena* arena) {
-    arena->flag |= FILL_FREEBLOCK;
+    arena->flag |= FILL_FREE_BLOCK_FLAG;
 }
 void ArenaImpl_SetCheckFreeBlock(Arena* arena) {
-    arena->flag |= CHECK_FREE_BLOCK;
+    arena->flag |= CHECK_FREE_BLOCK_FLAG;
 }
 
 void ArenaImpl_UnsetFillAllocBlock(Arena* arena) {
-    arena->flag &= ~FILL_ALLOCBLOCK;
+    arena->flag &= ~FILL_ALLOC_BLOCK_FLAG;
 }
 void ArenaImpl_UnsetFillFreeBlock(Arena* arena) {
-    arena->flag &= ~FILL_FREEBLOCK;
+    arena->flag &= ~FILL_FREE_BLOCK_FLAG;
 }
 void ArenaImpl_UnsetCheckFreeBlock(Arena* arena) {
-    arena->flag &= ~CHECK_FREE_BLOCK;
+    arena->flag &= ~CHECK_FREE_BLOCK_FLAG;
 }
 
-#if 0
-void ArenaImpl_SetDebugInfo(ArenaNode* node, const char* file, s32 line, Arena* arena) {
+void ArenaImpl_SetDebugInfo(ArenaNode* node, const char* file, int line, Arena* arena) {
+    // Upstream TODO: Figure out why uncommenting this crashes
+    /*
     node->filename = file;
     node->line = line;
     node->threadId = osGetThreadId(NULL);
     node->arena = arena;
     node->time = osGetTime();
+    */
 }
 #endif
+
 void ArenaImpl_LockInit(Arena* arena) {
     osCreateMesgQueue(&arena->lock, &sArenaLockMsg, 1);
 }
@@ -70,6 +141,7 @@ void ArenaImpl_Unlock(Arena* arena) {
     osRecvMesg(&arena->lock, NULL, OS_MESG_BLOCK);
 }
 
+#if OOT_DEBUG
 ArenaNode* ArenaImpl_GetNextBlock(ArenaNode* node) {
     ArenaNode* next = node->next;
 
@@ -91,16 +163,17 @@ ArenaNode* ArenaImpl_GetPrevBlock(ArenaNode* node) {
     }
     return prev;
 }
+#endif
 
 ArenaNode* ArenaImpl_GetLastBlock(Arena* arena) {
     ArenaNode* last = NULL;
     ArenaNode* iter;
 
-    if (arena != NULL && arena->head != NULL && arena->head->magic == NODE_MAGIC) {
+    if (arena != NULL && NODE_IS_VALID(arena->head)) {
         iter = arena->head;
         while (iter != NULL) {
             last = iter;
-            iter = ArenaImpl_GetNextBlock(iter);
+            iter = NODE_GET_NEXT(last);
         }
     }
     return last;
@@ -125,7 +198,7 @@ void __osMallocAddBlock(Arena* arena, void* start, ptrdiff_t size) {
         size2 = (size - diff) & ~0xF;
 
         if (size2 > (ptrdiff_t)sizeof(ArenaNode)) {
-            memset(firstNode, BLOCK_UNINIT_MAGIC, size2); // memset
+            FILL_UNINIT_BLOCK(arena, firstNode, size2);
             firstNode->next = NULL;
             firstNode->prev = NULL;
             firstNode->size = size2 - sizeof(ArenaNode);
@@ -145,6 +218,7 @@ void __osMallocAddBlock(Arena* arena, void* start, ptrdiff_t size) {
     }
 }
 
+#if OOT_DEBUG
 void ArenaImpl_RemoveAllBlocks(Arena* arena) {
     ArenaNode* iter;
     ArenaNode* next;
@@ -153,23 +227,27 @@ void ArenaImpl_RemoveAllBlocks(Arena* arena) {
 
     iter = arena->head;
     while (iter != NULL) {
-        next = ArenaImpl_GetNextBlock(iter);
-        memset(iter, BLOCK_UNINIT_MAGIC, iter->size + sizeof(ArenaNode)); // memset
+        next = NODE_GET_NEXT(iter);
+        memset(iter, BLOCK_UNINIT_MAGIC, iter->size + sizeof(ArenaNode));
         iter = next;
     }
 
     ArenaImpl_Unlock(arena);
 }
+#endif
 
 void __osMallocCleanup(Arena* arena) {
+#if OOT_DEBUG
     ArenaImpl_RemoveAllBlocks(arena);
+#endif
     memset(arena, 0, sizeof(*arena));
 }
 
-u8 __osMallocIsInitalized(Arena* arena) {
+s32 __osMallocIsInitialized(Arena* arena) {
     return arena->isInit;
 }
 
+#if OOT_DEBUG
 void __osMalloc_FreeBlockTest(Arena* arena, ArenaNode* node) {
     ArenaNode* node2 = node;
     u32* start;
@@ -194,26 +272,24 @@ void __osMalloc_FreeBlockTest(Arena* arena, ArenaNode* node) {
     }
 }
 
-void* __osMalloc_NoLockDebug(Arena* arena, size_t size, const char* file, s32 line) {
+void* __osMalloc_NoLockDebug(Arena* arena, size_t size, const char* file, int line) {
     ArenaNode* iter;
     u32 blockSize;
     ArenaNode* newNode;
     void* alloc = NULL;
     ArenaNode* next;
 
-    iter = arena->head;
     size = ALIGN16(size);
     blockSize = ALIGN16(size) + sizeof(ArenaNode);
+    iter = arena->head;
 
     while (iter != NULL) {
         if (iter->isFree && iter->size >= size) {
-            if (arena->flag & CHECK_FREE_BLOCK) {
-                __osMalloc_FreeBlockTest(arena, iter);
-            }
+            CHECK_FREE_BLOCK(arena, iter);
 
             if (blockSize < iter->size) {
                 newNode = (ArenaNode*)((uintptr_t)iter + blockSize);
-                newNode->next = ArenaImpl_GetNextBlock(iter);
+                newNode->next = NODE_GET_NEXT(iter);
                 newNode->prev = iter;
                 newNode->size = iter->size - blockSize;
                 newNode->isFree = true;
@@ -221,29 +297,27 @@ void* __osMalloc_NoLockDebug(Arena* arena, size_t size, const char* file, s32 li
 
                 iter->next = newNode;
                 iter->size = size;
-                next = ArenaImpl_GetNextBlock(newNode);
+                next = NODE_GET_NEXT(newNode);
                 if (next) {
                     next->prev = newNode;
                 }
             }
 
             iter->isFree = false;
-            //ArenaImpl_SetDebugInfo(iter, file, line, arena);
+            SET_DEBUG_INFO(iter, file, line, arena);
             alloc = (void*)((uintptr_t)iter + sizeof(ArenaNode));
-            if (arena->flag & FILL_ALLOCBLOCK) {
-                memset(alloc, BLOCK_ALLOC_MAGIC, size);
-            }
+            FILL_ALLOC_BLOCK(arena, alloc, size);
 
             break;
         }
 
-        iter = ArenaImpl_GetNextBlock(iter);
+        iter = NODE_GET_NEXT(iter);
     }
 
     return alloc;
 }
 
-void* __osMallocDebug(Arena* arena, size_t size, const char* file, s32 line) {
+void* __osMallocDebug(Arena* arena, size_t size, const char* file, int line) {
     void* alloc;
 
     ArenaImpl_Lock(arena);
@@ -253,7 +327,7 @@ void* __osMallocDebug(Arena* arena, size_t size, const char* file, s32 line) {
     return alloc;
 }
 
-void* __osMallocRDebug(Arena* arena, size_t size, const char* file, s32 line) {
+void* __osMallocRDebug(Arena* arena, size_t size, const char* file, int line) {
     ArenaNode* iter;
     ArenaNode* newNode;
     u32 blockSize;
@@ -266,21 +340,19 @@ void* __osMallocRDebug(Arena* arena, size_t size, const char* file, s32 line) {
 
     while (iter != NULL) {
         if (iter->isFree && iter->size >= size) {
-            if (arena->flag & CHECK_FREE_BLOCK) {
-                __osMalloc_FreeBlockTest(arena, iter);
-            }
+            CHECK_FREE_BLOCK(arena, iter);
 
             blockSize = ALIGN16(size) + sizeof(ArenaNode);
             if (blockSize < iter->size) {
                 newNode = (ArenaNode*)((uintptr_t)iter + (iter->size - size));
-                newNode->next = ArenaImpl_GetNextBlock(iter);
+                newNode->next = NODE_GET_NEXT(iter);
                 newNode->prev = iter;
                 newNode->size = size;
                 newNode->magic = NODE_MAGIC;
 
                 iter->next = newNode;
                 iter->size -= blockSize;
-                next = ArenaImpl_GetNextBlock(newNode);
+                next = NODE_GET_NEXT(newNode);
                 if (next) {
                     next->prev = newNode;
                 }
@@ -288,21 +360,21 @@ void* __osMallocRDebug(Arena* arena, size_t size, const char* file, s32 line) {
             }
 
             iter->isFree = false;
-            //ArenaImpl_SetDebugInfo(iter, file, line, arena);
+            SET_DEBUG_INFO(iter, file, line, arena);
             allocR = (void*)((uintptr_t)iter + sizeof(ArenaNode));
-            if (arena->flag & FILL_ALLOCBLOCK) {
-                memset(allocR, BLOCK_ALLOC_MAGIC, size);
-            }
+            FILL_ALLOC_BLOCK(arena, allocR, size);
 
             break;
         }
 
-        iter = ArenaImpl_GetPrevBlock(iter);
+        iter = NODE_GET_PREV(iter);
     }
+
     ArenaImpl_Unlock(arena);
 
     return allocR;
 }
+#endif
 
 void* __osMalloc_NoLock(Arena* arena, size_t size) {
     ArenaNode* iter;
@@ -311,20 +383,17 @@ void* __osMalloc_NoLock(Arena* arena, size_t size) {
     void* alloc = NULL;
     ArenaNode* next;
 
-    iter = arena->head;
     size = ALIGN16(size);
     blockSize = ALIGN16(size) + sizeof(ArenaNode);
+    iter = arena->head;
 
     while (iter != NULL) {
-
         if (iter->isFree && iter->size >= size) {
-            if (arena->flag & CHECK_FREE_BLOCK) {
-                __osMalloc_FreeBlockTest(arena, iter);
-            }
+            CHECK_FREE_BLOCK(arena, iter);
 
             if (blockSize < iter->size) {
                 newNode = (ArenaNode*)((uintptr_t)iter + blockSize);
-                newNode->next = ArenaImpl_GetNextBlock(iter);
+                newNode->next = NODE_GET_NEXT(iter);
                 newNode->prev = iter;
                 newNode->size = iter->size - blockSize;
                 newNode->isFree = true;
@@ -332,24 +401,25 @@ void* __osMalloc_NoLock(Arena* arena, size_t size) {
 
                 iter->next = newNode;
                 iter->size = size;
-                next = ArenaImpl_GetNextBlock(newNode);
+                next = NODE_GET_NEXT(newNode);
                 if (next) {
                     next->prev = newNode;
                 }
             }
 
             iter->isFree = false;
-            //ArenaImpl_SetDebugInfo(iter, NULL, 0, arena);
+            SET_DEBUG_INFO(iter, NULL, 0, arena);
             alloc = (void*)((uintptr_t)iter + sizeof(ArenaNode));
-            if (arena->flag & FILL_ALLOCBLOCK) {
-                memset(alloc, BLOCK_ALLOC_MAGIC, size);
-            }
+            FILL_ALLOC_BLOCK(arena, alloc, size);
+
             break;
         }
 
-        iter = ArenaImpl_GetNextBlock(iter);
+        iter = NODE_GET_NEXT(iter);
     }
 
+    CHECK_ALLOC_FAILURE(arena, alloc);
+
     return alloc;
 }
 
@@ -365,32 +435,33 @@ void* __osMalloc(Arena* arena, size_t size) {
 
 void* __osMallocR(Arena* arena, size_t size) {
     ArenaNode* iter;
+    ArenaNode* allocNode;
     ArenaNode* newNode;
-    u32 blockSize;
     ArenaNode* next;
     void* alloc = NULL;
+    u32 blockSize;
 
     size = ALIGN16(size);
+    blockSize = ALIGN16(size) + sizeof(ArenaNode);
     ArenaImpl_Lock(arena);
     iter = ArenaImpl_GetLastBlock(arena);
 
     while (iter != NULL) {
         if (iter->isFree && iter->size >= size) {
-            if (arena->flag & CHECK_FREE_BLOCK) {
-                __osMalloc_FreeBlockTest(arena, iter);
-            }
+            CHECK_FREE_BLOCK(arena, iter);
 
-            blockSize = ALIGN16(size) + sizeof(ArenaNode);
             if (blockSize < iter->size) {
-                newNode = (ArenaNode*)((uintptr_t)iter + (iter->size - size));
-                newNode->next = ArenaImpl_GetNextBlock(iter);
+                allocNode = (ArenaNode*)((uintptr_t)iter + (iter->size - size));
+                allocNode->next = NODE_GET_NEXT(iter);
+
+                newNode = allocNode;
                 newNode->prev = iter;
                 newNode->size = size;
                 newNode->magic = NODE_MAGIC;
 
                 iter->next = newNode;
                 iter->size -= blockSize;
-                next = ArenaImpl_GetNextBlock(newNode);
+                next = NODE_GET_NEXT(newNode);
                 if (next) {
                     next->prev = newNode;
                 }
@@ -398,15 +469,16 @@ void* __osMallocR(Arena* arena, size_t size) {
             }
 
             iter->isFree = false;
-            //ArenaImpl_SetDebugInfo(iter, NULL, 0, arena);
+            SET_DEBUG_INFO(iter, NULL, 0, arena);
             alloc = (void*)((uintptr_t)iter + sizeof(ArenaNode));
-            if (arena->flag & FILL_ALLOCBLOCK) {
-                memset(alloc, BLOCK_ALLOC_MAGIC, size);
-            }
+            FILL_ALLOC_BLOCK(arena, alloc, size);
             break;
         }
-        iter = ArenaImpl_GetPrevBlock(iter);
+        iter = NODE_GET_PREV(iter);
     }
+
+    CHECK_ALLOC_FAILURE(arena, alloc);
+
     ArenaImpl_Unlock(arena);
 
     return alloc;
@@ -416,14 +488,13 @@ void __osFree_NoLock(Arena* arena, void* ptr) {
     ArenaNode* node;
     ArenaNode* next;
     ArenaNode* prev;
-    ArenaNode* newNext;
 
     if (ptr == NULL) {
         return;
     }
 
     node = (ArenaNode*)((uintptr_t)ptr - sizeof(ArenaNode));
-    if (node == NULL || node->magic != NODE_MAGIC) {
+    if (!NODE_IS_VALID(node)) {
         // "__osFree: Unauthorized release (%08x)"
         osSyncPrintf(VT_COL(RED, WHITE) "__osFree:不正解放(%08x)\n" VT_RST, ptr);
         return;
@@ -432,34 +503,32 @@ void __osFree_NoLock(Arena* arena, void* ptr) {
         osSyncPrintf(VT_COL(RED, WHITE) "__osFree:二重解放(%08x)\n" VT_RST, ptr); // "__osFree: Double release (%08x)"
         return;
     }
-    #if 0
+#if OOT_DEBUG
+    /*
     if (arena != node->arena && arena != NULL) {
         // "__osFree:Tried to release in a different way than when it was secured (%08x:%08x)"
         osSyncPrintf(VT_COL(RED, WHITE) "__osFree:確保時と違う方法で解放しようとした (%08x:%08x)\n" VT_RST, arena,
                      node->arena);
         return;
     }
+    */
 #endif
-    next = ArenaImpl_GetNextBlock(node);
-    prev = ArenaImpl_GetPrevBlock(node);
+
+    next = NODE_GET_NEXT(node);
+    prev = NODE_GET_PREV(node);
     node->isFree = true;
-    //ArenaImpl_SetDebugInfo(node, NULL, 0, arena);
+    SET_DEBUG_INFO(node, NULL, 0, arena);
 
-    if (arena->flag & FILL_FREEBLOCK) {
-        memset((uintptr_t)node + sizeof(ArenaNode), BLOCK_FREE_MAGIC, node->size);
-    }
+    FILL_FREE_BLOCK_CONTENTS(arena, node);
 
-    newNext = next;
     if ((uintptr_t)next == (uintptr_t)node + sizeof(ArenaNode) + node->size && next->isFree) {
-        newNext = ArenaImpl_GetNextBlock(next);
+        ArenaNode* newNext = NODE_GET_NEXT(next);
         if (newNext != NULL) {
             newNext->prev = node;
         }
 
         node->size += next->size + sizeof(ArenaNode);
-        if (arena->flag & FILL_FREEBLOCK) {
-            memset(next, BLOCK_FREE_MAGIC, sizeof(ArenaNode));
-        }
+        FILL_FREE_BLOCK_HEADER(arena, next);
         node->next = newNext;
         next = newNext;
     }
@@ -470,9 +539,7 @@ void __osFree_NoLock(Arena* arena, void* ptr) {
         }
         prev->next = next;
         prev->size += node->size + sizeof(ArenaNode);
-        if (arena->flag & FILL_FREEBLOCK) {
-            memset(node, BLOCK_FREE_MAGIC, sizeof(ArenaNode));
-        }
+        FILL_FREE_BLOCK_HEADER(arena, node);
     }
 }
 
@@ -482,7 +549,8 @@ void __osFree(Arena* arena, void* ptr) {
     ArenaImpl_Unlock(arena);
 }
 
-void __osFree_NoLockDebug(Arena* arena, void* ptr, const char* file, s32 line) {
+#if OOT_DEBUG
+void __osFree_NoLockDebug(Arena* arena, void* ptr, const char* file, int line) {
     ArenaNode* node;
     ArenaNode* next;
     ArenaNode* prev;
@@ -493,7 +561,7 @@ void __osFree_NoLockDebug(Arena* arena, void* ptr, const char* file, s32 line) {
     }
 
     node = (ArenaNode*)((uintptr_t)ptr - sizeof(ArenaNode));
-    if (node == NULL || node->magic != NODE_MAGIC) {
+    if (!NODE_IS_VALID(node)) {
         // "__osFree: Unauthorized release (%08x)"
         osSyncPrintf(VT_COL(RED, WHITE) "__osFree:不正解放(%08x) [%s:%d ]\n" VT_RST, ptr, file, line);
         return;
@@ -503,34 +571,32 @@ void __osFree_NoLockDebug(Arena* arena, void* ptr, const char* file, s32 line) {
         osSyncPrintf(VT_COL(RED, WHITE) "__osFree:二重解放(%08x) [%s:%d ]\n" VT_RST, ptr, file, line);
         return;
     }
-    #if 0
+
+    /*
     if (arena != node->arena && arena != NULL) {
         // "__osFree:Tried to release in a different way than when it was secured (%08x:%08x)"
         osSyncPrintf(VT_COL(RED, WHITE) "__osFree:確保時と違う方法で解放しようとした (%08x:%08x)\n" VT_RST, arena,
                      node->arena);
         return;
     }
-    #endif
-    next = ArenaImpl_GetNextBlock(node);
-    prev = ArenaImpl_GetPrevBlock(node);
+    */
+
+    next = NODE_GET_NEXT(node);
+    prev = NODE_GET_PREV(node);
     node->isFree = true;
-    //ArenaImpl_SetDebugInfo(node, file, line, arena);
+    SET_DEBUG_INFO(node, file, line, arena);
 
-    if (arena->flag & FILL_FREEBLOCK) {
-        memset((uintptr_t)node + sizeof(ArenaNode), BLOCK_FREE_MAGIC, node->size);
-    }
+    FILL_FREE_BLOCK_CONTENTS(arena, node);
 
     newNext = node->next;
     if ((uintptr_t)next == (uintptr_t)node + sizeof(ArenaNode) + node->size && next->isFree) {
-        newNext = ArenaImpl_GetNextBlock(next);
+        newNext = NODE_GET_NEXT(next);
         if (newNext != NULL) {
             newNext->prev = node;
         }
 
         node->size += next->size + sizeof(ArenaNode);
-        if (arena->flag & FILL_FREEBLOCK) {
-            memset(next, BLOCK_FREE_MAGIC, sizeof(ArenaNode));
-        }
+        FILL_FREE_BLOCK_HEADER(arena, next);
         node->next = newNext;
         next = newNext;
     }
@@ -541,21 +607,20 @@ void __osFree_NoLockDebug(Arena* arena, void* ptr, const char* file, s32 line) {
         }
         prev->next = next;
         prev->size += node->size + sizeof(ArenaNode);
-        if (arena->flag & FILL_FREEBLOCK) {
-            memset(node, BLOCK_FREE_MAGIC, sizeof(ArenaNode));
-        }
+        FILL_FREE_BLOCK_HEADER(arena, node);
     }
 }
 
-void __osFreeDebug(Arena* arena, void* ptr, const char* file, s32 line) {
+void __osFreeDebug(Arena* arena, void* ptr, const char* file, int line) {
     ArenaImpl_Lock(arena);
     __osFree_NoLockDebug(arena, ptr, file, line);
     ArenaImpl_Unlock(arena);
 }
+#endif
 
 void* __osRealloc(Arena* arena, void* ptr, size_t newSize) {
-    void* newAlloc;
     ArenaNode* node;
+    void* newAlloc;
     ArenaNode* next;
     ArenaNode* newNext;
     ArenaNode* overNext;
@@ -582,20 +647,20 @@ void* __osRealloc(Arena* arena, void* ptr, size_t newSize) {
             // "Does nothing because the memory block size does not change"
             osSyncPrintf("メモリブロックサイズが変わらないためなにもしません\n");
         } else if (node->size < newSize) {
-            next = ArenaImpl_GetNextBlock(node);
+            next = NODE_GET_NEXT(node);
             sizeDiff = newSize - node->size;
             if ((uintptr_t)next == ((uintptr_t)node + node->size + sizeof(ArenaNode)) && next->isFree && next->size >= sizeDiff) {
                 // "Merge because there is a free block after the current memory block"
                 osSyncPrintf("現メモリブロックの後ろにフリーブロックがあるので結合します\n");
                 next->size -= sizeDiff;
-                overNext = ArenaImpl_GetNextBlock(next);
+                overNext = NODE_GET_NEXT(next);
                 newNext = (ArenaNode*)((uintptr_t)next + sizeDiff);
                 if (overNext != NULL) {
                     overNext->prev = newNext;
                 }
                 node->next = newNext;
                 node->size = newSize;
-                func_801068B0(newNext, next, sizeof(ArenaNode)); // memcpy
+                memmove(node->next, next, sizeof(ArenaNode));
             } else {
                 // "Allocate a new memory block and move the contents"
                 osSyncPrintf("新たにメモリブロックを確保して内容を移動します\n");
@@ -607,7 +672,7 @@ void* __osRealloc(Arena* arena, void* ptr, size_t newSize) {
                 ptr = newAlloc;
             }
         } else if (newSize < node->size) {
-            next2 = ArenaImpl_GetNextBlock(node);
+            next2 = NODE_GET_NEXT(node);
             if (next2 != NULL && next2->isFree) {
                 blockSize = ALIGN16(newSize) + sizeof(ArenaNode);
                 // "Increased free block behind current memory block"
@@ -618,7 +683,7 @@ void* __osRealloc(Arena* arena, void* ptr, size_t newSize) {
                 newNext2->size += node->size - newSize;
                 node->next = newNext2;
                 node->size = newSize;
-                overNext2 = ArenaImpl_GetNextBlock(newNext2);
+                overNext2 = NODE_GET_NEXT(newNext2);
                 if (overNext2 != NULL) {
                     overNext2->prev = newNext2;
                 }
@@ -627,14 +692,14 @@ void* __osRealloc(Arena* arena, void* ptr, size_t newSize) {
                 // "Generated because there is no free block after the current memory block"
                 osSyncPrintf("現メモリブロックの後ろにフリーブロックがないので生成します\n");
                 newNext2 = (ArenaNode*)((uintptr_t)node + blockSize);
-                newNext2->next = ArenaImpl_GetNextBlock(node);
+                newNext2->next = NODE_GET_NEXT(node);
                 newNext2->prev = node;
                 newNext2->size = node->size - blockSize;
                 newNext2->isFree = true;
                 newNext2->magic = NODE_MAGIC;
                 node->next = newNext2;
                 node->size = newSize;
-                overNext2 = ArenaImpl_GetNextBlock(newNext2);
+                overNext2 = NODE_GET_NEXT(newNext2);
                 if (overNext2 != NULL) {
                     overNext2->prev = newNext2;
                 }
@@ -644,15 +709,19 @@ void* __osRealloc(Arena* arena, void* ptr, size_t newSize) {
                 ptr = NULL;
             }
         }
+
+        CHECK_ALLOC_FAILURE(arena, ptr);
     }
     ArenaImpl_Unlock(arena);
 
     return ptr;
 }
 
-void* __osReallocDebug(Arena* arena, void* ptr, size_t newSize, const char* file, s32 line) {
+#if OOT_DEBUG
+void* __osReallocDebug(Arena* arena, void* ptr, size_t newSize, const char* file, int line) {
     return __osRealloc(arena, ptr, newSize);
 }
+#endif
 
 void ArenaImpl_GetSizes(Arena* arena, u32* outMaxFree, u32* outFree, u32* outAlloc) {
     ArenaNode* iter;
@@ -674,12 +743,13 @@ void ArenaImpl_GetSizes(Arena* arena, u32* outMaxFree, u32* outFree, u32* outAll
             *outAlloc += iter->size;
         }
 
-        iter = ArenaImpl_GetNextBlock(iter);
+        iter = NODE_GET_NEXT(iter);
     }
 
     ArenaImpl_Unlock(arena);
 }
 
+#if OOT_DEBUG
 void __osDisplayArena(Arena* arena) {
     size_t freeSize;
     size_t allocatedSize;
@@ -687,7 +757,7 @@ void __osDisplayArena(Arena* arena) {
     ArenaNode* iter;
     ArenaNode* next;
 
-    if (!__osMallocIsInitalized(arena)) {
+    if (!__osMallocIsInitialized(arena)) {
         osSyncPrintf("アリーナは初期化されていません\n"); // "Arena is not initalized"
         return;
     }
@@ -710,12 +780,14 @@ void __osDisplayArena(Arena* arena) {
                          (next == NULL) ? '$' : (iter != next->prev ? '!' : ' '),
                          iter->isFree ? "空き" : "確保", //? "Free" : "Secure"
                          iter->size);
-            #if 0
+
+            /*
             if (!iter->isFree) {
                 osSyncPrintf(" [%016llu:%2d:%s:%d]", OS_CYCLES_TO_NSEC(iter->time), iter->threadId,
                              iter->filename != NULL ? iter->filename : "**NULL**", iter->line);
             }
-            #endif
+            */
+
             osSyncPrintf("\n");
 
             if (iter->isFree) {
@@ -742,6 +814,7 @@ void __osDisplayArena(Arena* arena) {
 
     ArenaImpl_Unlock(arena);
 }
+#endif
 
 void ArenaImpl_FaultClient(Arena* arena) {
     size_t freeSize;
@@ -751,7 +824,7 @@ void ArenaImpl_FaultClient(Arena* arena) {
     ArenaNode* next;
 
     FaultDrawer_Printf("ARENA INFO (0x%08x)\n", arena);
-    if (!__osMallocIsInitalized(arena)) {
+    if (!__osMallocIsInitialized(arena)) {
         FaultDrawer_Printf("Arena is uninitalized\n", arena);
         return;
     }
@@ -793,7 +866,7 @@ void ArenaImpl_FaultClient(Arena* arena) {
     FaultDrawer_Printf("Largest Free Block Size %08x\n", maxFree);
 }
 
-u32 __osCheckArena(Arena* arena) {
+s32 __osCheckArena(Arena* arena) {
     ArenaNode* iter;
     u32 error = 0;
 
@@ -802,13 +875,20 @@ u32 __osCheckArena(Arena* arena) {
     osSyncPrintf("アリーナの内容をチェックしています．．． (%08x)\n", arena);
     iter = arena->head;
     while (iter != NULL) {
-        if (iter && iter->magic == NODE_MAGIC) {
+        //! @bug: Probably intended to be `!NODE_IS_VALID(iter)`
+        if (NODE_IS_VALID(iter)) {
+#if OOT_DEBUG
             // "Oops!! (%08x %08x)"
-            osSyncPrintf(VT_COL(RED, WHITE) "おおっと！！ (%08x %08x)\n" VT_RST, iter, iter->magic);
+            osSyncPrintf(VT_COL(RED, WHITE) "おおっと！！ (%08x %08x)\n" VT_RST, iter,
+                         iter->magic);
+#else
+            // "Oops!! (%08x %08x)"
+            osSyncPrintf("おおっと！！ (%08x %08x)\n", iter, iter->magic);
+#endif
             error = 1;
             break;
         }
-        iter = ArenaImpl_GetNextBlock(iter);
+        iter = NODE_GET_NEXT(iter);
     }
     if (error == 0) {
         osSyncPrintf("アリーナはまだ、いけそうです\n"); // "The arena is still going well"
@@ -818,6 +898,8 @@ u32 __osCheckArena(Arena* arena) {
     return error;
 }
 
-u8 func_800FF334(Arena* arena) {
+#if OOT_DEBUG
+u8 ArenaImpl_GetAllocFailures(Arena* arena) {
     return arena->unk_20;
 }
+#endif
\ No newline at end of file
diff --git a/soh/src/code/code_801068B0.c b/soh/src/code/code_801068B0.c
index d673cc5e0fe..87434a2744c 100644
--- a/soh/src/code/code_801068B0.c
+++ b/soh/src/code/code_801068B0.c
@@ -1,24 +1,33 @@
 #include "global.h"
 
-// memmove used in __osMalloc.c
-void* func_801068B0(void* dst, void* src, size_t size) {
-    u8* spC = dst;
-    u8* sp8 = src;
-    register s32 a3;
+/**
+ * memmove: copies `len` bytes from memory starting at `src` to memory starting at `dest`.
+ *
+ * Unlike memcpy(), the regions of memory may overlap.
+ *
+ * @param dest address of start of buffer to write to
+ * @param src address of start of buffer to read from
+ * @param len number of bytes to copy.
+ *
+ * @return dest
+ */
+void* oot_memmove(void* dest, const void* src, size_t len) {
+    char* d = dest;
+    const char* s = src;
 
-    if (spC == sp8) {
-        return dst;
+    if (d == s) {
+        return dest;
     }
-    if (spC < sp8) {
-        for (a3 = size--; a3 != 0; a3 = size--) {
-            *spC++ = *sp8++;
+    if (d < s) {
+        while (len--) {
+            *d++ = *s++;
         }
     } else {
-        spC += size - 1;
-        sp8 += size - 1;
-        for (a3 = size--; a3 != 0; a3 = size--) {
-            *spC-- = *sp8--;
+        d += len - 1;
+        s += len - 1;
+        while (len--) {
+            *d-- = *s--;
         }
     }
-    return dst;
+    return dest;
 }
diff --git a/soh/src/code/debug_malloc.c b/soh/src/code/debug_malloc.c
index c1c4f99d003..396e4086d7f 100644
--- a/soh/src/code/debug_malloc.c
+++ b/soh/src/code/debug_malloc.c
@@ -109,5 +109,5 @@ void DebugArena_Cleanup(void) {
 }
 
 u8 DebugArena_IsInitalized(void) {
-    return __osMallocIsInitalized(&sDebugArena);
+    return __osMallocIsInitialized(&sDebugArena);
 }
diff --git a/soh/src/code/system_malloc.c b/soh/src/code/system_malloc.c
index e8bfefed398..7995209eec1 100644
--- a/soh/src/code/system_malloc.c
+++ b/soh/src/code/system_malloc.c
@@ -107,5 +107,5 @@ void SystemArena_Cleanup(void) {
 }
 
 u8 SystemArena_IsInitalized(void) {
-    return __osMallocIsInitalized(&gSystemArena);
+    return __osMallocIsInitialized(&gSystemArena);
 }
diff --git a/soh/src/code/z_malloc.c b/soh/src/code/z_malloc.c
index acd4429c071..a44c1e47ded 100644
--- a/soh/src/code/z_malloc.c
+++ b/soh/src/code/z_malloc.c
@@ -106,5 +106,5 @@ void ZeldaArena_Cleanup() {
 }
 
 u8 ZeldaArena_IsInitalized() {
-    return __osMallocIsInitalized(&sZeldaArena);
+    return __osMallocIsInitialized(&sZeldaArena);
 }