diff --git a/libexosphere/include/exosphere/pkg2.hpp b/libexosphere/include/exosphere/pkg2.hpp
index 8df2bc65..9fa9425d 100644
--- a/libexosphere/include/exosphere/pkg2.hpp
+++ b/libexosphere/include/exosphere/pkg2.hpp
@@ -19,9 +19,9 @@
 namespace ams::pkg2 {
 
     constexpr inline size_t Package2SizeMax  = 8_MB - 16_KB;
-    constexpr inline size_t SegmentAlignment = 4;
+    constexpr inline size_t PayloadAlignment = 4;
 
-    constexpr inline int SegmentCount = 3;
+    constexpr inline int PayloadCount = 3;
 
     constexpr inline int MinimumValidDataVersion  = 0;   /* We allow older package2 to load; this value is currently 0x10 in Nintendo's code. */
     constexpr inline int CurrentBootloaderVersion = 0xD;
@@ -32,7 +32,7 @@ namespace ams::pkg2 {
         u32 package2_size;
         u8  key_generation;
         u8  header_iv_remainder[11];
-        u8  segment_iv[SegmentCount][0x10];
+        u8  payload_ivs[PayloadCount][0x10];
         u8  padding_40[0x10];
         u8  magic[4];
         u32 entrypoint;
@@ -40,11 +40,11 @@ namespace ams::pkg2 {
         u8  package2_version;
         u8  bootloader_version;
         u8  padding_5E[2];
-        u32 segment_sizes[SegmentCount];
+        u32 payload_sizes[PayloadCount];
         u8  padding_6C[4];
-        u32 segment_offsets[SegmentCount];
+        u32 payload_offsets[PayloadCount];
         u8  padding_7C[4];
-        u8  segment_hashes[SegmentCount][crypto::Sha256Generator::HashSize];
+        u8  payload_hashes[PayloadCount][crypto::Sha256Generator::HashSize];
         u8  padding_E0[0x20];
 
         private:
@@ -53,7 +53,7 @@ namespace ams::pkg2 {
             }
         public:
             ALWAYS_INLINE u8 GetKeyGeneration() const {
-                return std::min<u8>(0, (this->key_generation ^ this->header_iv_remainder[1] ^ this->header_iv_remainder[2]) - 1);
+                return static_cast<u8>(std::max<s32>(0, static_cast<s32>(this->key_generation ^ this->header_iv_remainder[1] ^ this->header_iv_remainder[2]) - 1));
             }
 
             ALWAYS_INLINE u32 GetSize() const {
diff --git a/libexosphere/include/exosphere/secmon/secmon_memory_layout.hpp b/libexosphere/include/exosphere/secmon/secmon_memory_layout.hpp
index 34e4be52..ffe9625e 100644
--- a/libexosphere/include/exosphere/secmon/secmon_memory_layout.hpp
+++ b/libexosphere/include/exosphere/secmon/secmon_memory_layout.hpp
@@ -80,6 +80,9 @@ namespace ams::secmon {
     constexpr inline const MemoryRegion MemoryRegionDramDefaultKernelCarveout = MemoryRegion(UINT64_C(0x80060000), UINT64_C(0x1FFE0000));
     static_assert(MemoryRegionDram.Contains(MemoryRegionDramDefaultKernelCarveout));
 
+    constexpr inline const MemoryRegion MemoryRegionDramPackage2Payloads = MemoryRegion(MemoryRegionDram.GetAddress(), 8_MB);
+    static_assert(MemoryRegionDram.Contains(MemoryRegionDramPackage2Payloads));
+
     constexpr inline const MemoryRegion MemoryRegionDramPackage2 = MemoryRegion(UINT64_C(0xA9800000), UINT64_C(0x07FC0000));
     static_assert(MemoryRegionDram.Contains(MemoryRegionDramPackage2));
 
diff --git a/libvapours/include/vapours/util.hpp b/libvapours/include/vapours/util.hpp
index c10fa5d3..0d60a3ea 100644
--- a/libvapours/include/vapours/util.hpp
+++ b/libvapours/include/vapours/util.hpp
@@ -36,5 +36,6 @@
 #include <vapours/util/util_tinymt.hpp>
 #include <vapours/util/util_uuid.hpp>
 #include <vapours/util/util_bounded_map.hpp>
+#include <vapours/util/util_overlap.hpp>
 #include <vapours/util/util_string_util.hpp>
 #include <vapours/util/util_variadic.hpp>
diff --git a/libvapours/include/vapours/util/util_overlap.hpp b/libvapours/include/vapours/util/util_overlap.hpp
new file mode 100644
index 00000000..a1bf7d2d
--- /dev/null
+++ b/libvapours/include/vapours/util/util_overlap.hpp
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2018-2020 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+#include <vapours/common.hpp>
+#include <vapours/assert.hpp>
+
+namespace ams::util {
+
+    constexpr inline bool HasOverlap(uintptr_t addr0, size_t size0, uintptr_t addr1, size_t size1) {
+        if (addr0 <= addr1) {
+            return addr1 < addr0 + size0;
+        } else {
+            return addr0 < addr1 + size1;
+        }
+    }
+
+    constexpr inline bool Contains(uintptr_t addr, size_t size, uintptr_t ptr) {
+        return (addr <= ptr) && (ptr < addr + size);
+    }
+
+}