diff --git a/FEXCore/Source/Utils/Allocator.cpp b/FEXCore/Source/Utils/Allocator.cpp
index 58311a374..468f92c95 100644
--- a/FEXCore/Source/Utils/Allocator.cpp
+++ b/FEXCore/Source/Utils/Allocator.cpp
@@ -112,14 +112,18 @@ void ReenableSBRKAllocations(void* Ptr) {
 
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
-void SetupHooks() {
-  Alloc64 = Alloc::OSAllocator::Create64BitAllocator();
+static void AssignHookOverrides() {
   SetJemallocMmapHook(FEX_mmap);
   SetJemallocMunmapHook(FEX_munmap);
   FEXCore::Allocator::mmap = FEX_mmap;
   FEXCore::Allocator::munmap = FEX_munmap;
 }
 
+void SetupHooks() {
+  Alloc64 = Alloc::OSAllocator::Create64BitAllocator();
+  AssignHookOverrides();
+}
+
 void ClearHooks() {
   SetJemallocMmapHook(::mmap);
   SetJemallocMunmapHook(::munmap);
@@ -300,15 +304,18 @@ fextl::vector<MemoryRegion> StealMemoryRegion(uintptr_t Begin, uintptr_t End) {
   return Regions;
 }
 
-fextl::vector<MemoryRegion> Steal48BitVA() {
+void Setup48BitAllocatorIfExists() {
   size_t Bits = FEXCore::Allocator::DetermineVASize();
   if (Bits < 48) {
-    return {};
+    return;
   }
 
   uintptr_t Begin48BitVA = 0x0'8000'0000'0000ULL;
   uintptr_t End48BitVA = 0x1'0000'0000'0000ULL;
-  return StealMemoryRegion(Begin48BitVA, End48BitVA);
+  auto Regions = StealMemoryRegion(Begin48BitVA, End48BitVA);
+
+  Alloc64 = Alloc::OSAllocator::Create64BitAllocatorWithRegions(Regions);
+  AssignHookOverrides();
 }
 
 void ReclaimMemoryRegion(const fextl::vector<MemoryRegion>& Regions) {
diff --git a/FEXCore/Source/Utils/Allocator/64BitAllocator.cpp b/FEXCore/Source/Utils/Allocator/64BitAllocator.cpp
index 60d6545c0..a34071502 100644
--- a/FEXCore/Source/Utils/Allocator/64BitAllocator.cpp
+++ b/FEXCore/Source/Utils/Allocator/64BitAllocator.cpp
@@ -7,6 +7,8 @@
 #include <FEXCore/Utils/MathUtils.h>
 #include <FEXCore/Utils/SignalScopeGuards.h>
 #include <FEXCore/Utils/TypeDefines.h>
+#include <FEXCore/Utils/LogManager.h>
+#include <FEXCore/Utils/MathUtils.h>
 #include <FEXCore/fextl/sstream.h>
 #include <FEXHeaderUtils/Syscalls.h>
 #include <FEXCore/fextl/memory.h>
@@ -35,6 +37,8 @@ thread_local FEXCore::Core::InternalThreadState* TLSThread {};
 class OSAllocator_64Bit final : public Alloc::HostAllocator {
 public:
   OSAllocator_64Bit();
+  OSAllocator_64Bit(fextl::vector<FEXCore::Allocator::MemoryRegion>& Regions);
+
   virtual ~OSAllocator_64Bit();
   void* AllocateSlab(size_t Size) override {
     return nullptr;
@@ -180,7 +184,7 @@ private:
   // 32-bit old kernel workarounds
   fextl::vector<FEXCore::Allocator::MemoryRegion> Steal32BitIfOldKernel();
 
-  void AllocateMemoryRegions(const fextl::vector<FEXCore::Allocator::MemoryRegion>& Ranges);
+  void AllocateMemoryRegions(fextl::vector<FEXCore::Allocator::MemoryRegion>& Ranges);
   LiveVMARegion* FindLiveRegionForAddress(uintptr_t Addr, uintptr_t AddrEnd);
 };
 
@@ -515,29 +519,41 @@ fextl::vector<FEXCore::Allocator::MemoryRegion> OSAllocator_64Bit::Steal32BitIfO
   return FEXCore::Allocator::StealMemoryRegion(LOWER_BOUND_32, UPPER_BOUND_32);
 }
 
-void OSAllocator_64Bit::AllocateMemoryRegions(const fextl::vector<FEXCore::Allocator::MemoryRegion>& Ranges) {
-  for (auto [Ptr, AllocationSize] : Ranges) {
-    if (!ObjectAlloc) {
-      auto MaxSize = std::min(size_t(64) * 1024 * 1024, AllocationSize);
+void OSAllocator_64Bit::AllocateMemoryRegions(fextl::vector<FEXCore::Allocator::MemoryRegion>& Ranges) {
+  // Need to allocate the ObjectAlloc up front. Find a region that is larger than our minimum size first.
+  const size_t ObjectAllocSize = 64 * 1024 * 1024;
 
-      // Allocate up to 64 MiB the first allocation for an intrusive allocator
-      mprotect(Ptr, MaxSize, PROT_READ | PROT_WRITE);
-
-      // This enables the kernel to use transparent large pages in the allocator which can reduce memory pressure
-      ::madvise(Ptr, MaxSize, MADV_HUGEPAGE);
-
-      ObjectAlloc = new (Ptr) Alloc::ForwardOnlyIntrusiveArenaAllocator(Ptr, MaxSize);
-      ReservedRegions = ObjectAlloc->new_construct(ReservedRegions, ObjectAlloc);
-      LiveRegions = ObjectAlloc->new_construct(LiveRegions, ObjectAlloc);
-
-      if (AllocationSize > MaxSize) {
-        AllocationSize -= MaxSize;
-        (uint8_t*&)Ptr += MaxSize;
-      } else {
-        continue;
-      }
+  for (auto& it : Ranges) {
+    if (ObjectAllocSize > it.Size) {
+      continue;
     }
 
+    // Allocate up to 64 MiB the first allocation for an intrusive allocator
+    mprotect(it.Ptr, ObjectAllocSize, PROT_READ | PROT_WRITE);
+
+    // This enables the kernel to use transparent large pages in the allocator which can reduce memory pressure
+    ::madvise(it.Ptr, ObjectAllocSize, MADV_HUGEPAGE);
+
+    ObjectAlloc = new (it.Ptr) Alloc::ForwardOnlyIntrusiveArenaAllocator(it.Ptr, ObjectAllocSize);
+    ReservedRegions = ObjectAlloc->new_construct(ReservedRegions, ObjectAlloc);
+    LiveRegions = ObjectAlloc->new_construct(LiveRegions, ObjectAlloc);
+
+    if (it.Size >= ObjectAllocSize) {
+      // Modify region size
+      it.Size -= ObjectAllocSize;
+      (uint8_t*&)it.Ptr += ObjectAllocSize;
+    }
+
+    break;
+  }
+
+  if (!ObjectAlloc) {
+    ERROR_AND_DIE_FMT("Couldn't allocate object allocator!");
+  }
+
+  for (auto [Ptr, AllocationSize] : Ranges) {
+    // Skip size of zero if ObjectAllocSize matched the size of region.
+    if (AllocationSize == 0) continue;
     ReservedVMARegion* Region = ObjectAlloc->new_construct<ReservedVMARegion>();
     Region->Base = reinterpret_cast<uint64_t>(Ptr);
     Region->RegionSize = AllocationSize;
@@ -557,6 +573,10 @@ OSAllocator_64Bit::OSAllocator_64Bit() {
   FEXCore::Allocator::ReclaimMemoryRegion(LowMem);
 }
 
+OSAllocator_64Bit::OSAllocator_64Bit(fextl::vector<FEXCore::Allocator::MemoryRegion>& Regions) {
+  AllocateMemoryRegions(Regions);
+}
+
 OSAllocator_64Bit::~OSAllocator_64Bit() {
   // This needs a mutex to be thread safe
   auto lk = FEXCore::GuardSignalDeferringSectionWithFallback(AllocationMutex, TLSThread);
@@ -576,6 +596,61 @@ OSAllocator_64Bit::~OSAllocator_64Bit() {
 fextl::unique_ptr<Alloc::HostAllocator> Create64BitAllocator() {
   return fextl::make_unique<OSAllocator_64Bit>();
 }
+
+template<class T>
+struct alloc_delete : public std::default_delete<T> {
+  void operator()(T* ptr) const {
+    if (ptr) {
+      const auto size = sizeof(T);
+      const auto MinPage = FEXCore::AlignUp(size, FEXCore::Utils::FEX_PAGE_SIZE);
+
+      std::destroy_at(ptr);
+      ::munmap(ptr, MinPage);
+    }
+  }
+
+  template<typename U>
+  requires (std::is_base_of_v<U, T>)
+  operator fextl::default_delete<U>() {
+    return fextl::default_delete<U>();
+  }
+};
+
+template<class T, class... Args>
+requires (!std::is_array_v<T>)
+fextl::unique_ptr<T> make_alloc_unique(FEXCore::Allocator::MemoryRegion& Base, Args&&... args) {
+  const auto size = sizeof(T);
+  const auto MinPage = FEXCore::AlignUp(size, FEXCore::Utils::FEX_PAGE_SIZE);
+  if (Base.Size < size || MinPage != FEXCore::Utils::FEX_PAGE_SIZE) {
+    ERROR_AND_DIE_FMT("Couldn't fit allocator in to page!");
+  }
+
+  // Remove the page from the base region.
+  // Could be zero after this.
+  Base.Size -= MinPage;
+  Base.Ptr = reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(Base.Ptr) + MinPage);
+
+  auto ptr = ::mmap(Base.Ptr, MinPage, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
+  if (ptr == MAP_FAILED) {
+    ERROR_AND_DIE_FMT("Couldn't allocate memory region");
+  }
+  auto Result = ::new (ptr) T(std::forward<Args>(args)...);
+  return fextl::unique_ptr<T, alloc_delete<T>>(Result);
+}
+
+fextl::unique_ptr<Alloc::HostAllocator> Create64BitAllocatorWithRegions(fextl::vector<FEXCore::Allocator::MemoryRegion>& Regions) {
+  // This is a bit tricky as we can't allocate memory safely except from the Regions provided. Otherwise we might overwrite memory pages we
+  // don't own. Scan the memory regions and find the smallest one.
+  FEXCore::Allocator::MemoryRegion& Smallest = Regions[0];
+  for (auto& it : Regions) {
+    if (it.Size <= Smallest.Size) {
+      Smallest = it;
+    }
+  }
+
+  return make_alloc_unique<OSAllocator_64Bit>(Smallest, Regions);
+}
+
 } // namespace Alloc::OSAllocator
 
 namespace FEXCore::Allocator {
diff --git a/FEXCore/Source/Utils/Allocator/HostAllocator.h b/FEXCore/Source/Utils/Allocator/HostAllocator.h
index 445722de7..a3e464892 100644
--- a/FEXCore/Source/Utils/Allocator/HostAllocator.h
+++ b/FEXCore/Source/Utils/Allocator/HostAllocator.h
@@ -2,9 +2,10 @@
 #pragma once
 #include <FEXCore/fextl/allocator.h>
 #include <FEXCore/fextl/memory.h>
+#include <FEXCore/fextl/vector.h>
+#include <FEXCore/Utils/Allocator.h>
 
 #include <cstddef>
-#include <cstdint>
 #include <sys/types.h>
 
 namespace FEXCore::Core {
@@ -49,4 +50,5 @@ public:
 
 namespace Alloc::OSAllocator {
 fextl::unique_ptr<Alloc::HostAllocator> Create64BitAllocator();
+fextl::unique_ptr<Alloc::HostAllocator> Create64BitAllocatorWithRegions(fextl::vector<FEXCore::Allocator::MemoryRegion>& Regions);
 } // namespace Alloc::OSAllocator
diff --git a/FEXCore/include/FEXCore/Utils/Allocator.h b/FEXCore/include/FEXCore/Utils/Allocator.h
index 795aff1aa..efbb70f7c 100644
--- a/FEXCore/include/FEXCore/Utils/Allocator.h
+++ b/FEXCore/include/FEXCore/Utils/Allocator.h
@@ -86,7 +86,7 @@ FEX_DEFAULT_VISIBILITY void ReclaimMemoryRegion(const fextl::vector<MemoryRegion
 // AArch64 canonical addresses are only up to bits 48/52 with the remainder being other things
 // Use this to reserve the top 128TB of VA so the guest never see it
 // Returns nullptr on host VA < 48bits
-FEX_DEFAULT_VISIBILITY fextl::vector<MemoryRegion> Steal48BitVA();
+FEX_DEFAULT_VISIBILITY void Setup48BitAllocatorIfExists();
 
 #ifndef _WIN32
 FEX_DEFAULT_VISIBILITY void RegisterTLSData(FEXCore::Core::InternalThreadState* Thread);
diff --git a/Source/Tools/FEXLoader/FEXLoader.cpp b/Source/Tools/FEXLoader/FEXLoader.cpp
index dd0aec576..48bc61808 100644
--- a/Source/Tools/FEXLoader/FEXLoader.cpp
+++ b/Source/Tools/FEXLoader/FEXLoader.cpp
@@ -491,12 +491,11 @@ int main(int argc, char** argv, char** const envp) {
   FEXCore::Config::EraseSet(FEXCore::Config::CONFIG_IS64BIT_MODE, Loader.Is64BitMode() ? "1" : "0");
 
   fextl::unique_ptr<FEX::HLE::MemAllocator> Allocator;
-  fextl::vector<FEXCore::Allocator::MemoryRegion> Base48Bit;
   fextl::vector<FEXCore::Allocator::MemoryRegion> Low4GB;
 
   if (Loader.Is64BitMode()) {
     // Destroy the 48th bit if it exists
-    Base48Bit = FEXCore::Allocator::Steal48BitVA();
+    FEXCore::Allocator::Setup48BitAllocatorIfExists();
   } else {
     // Reserve [0x1_0000_0000, 0x2_0000_0000).
     // Safety net if 32-bit address calculation overflows in to 64-bit range.
@@ -685,7 +684,6 @@ int main(int argc, char** argv, char** const envp) {
   LogMan::Msg::UnInstallHandler();
 
   FEXCore::Allocator::ClearHooks();
-  FEXCore::Allocator::ReclaimMemoryRegion(Base48Bit);
   FEXCore::Allocator::ReclaimMemoryRegion(Low4GB);
 
   // Allocator is now original system allocator