3 files changed, 20 insertions, 5 deletions

diff --git a/src/core/loader/deconstructed_rom_directory.cpp b/src/core/loader/deconstructed_rom_directory.cpp
index c1824b9c3..9a86e5824 100644
--- a/src/core/loader/deconstructed_rom_directory.cpp
+++ b/src/core/loader/deconstructed_rom_directory.cpp
@@ -130,6 +130,7 @@ ResultStatus AppLoader_DeconstructedRomDirectory::Load(Kernel::Process& process)
     }
 
     process.LoadFromMetadata(metadata);
+    const FileSys::PatchManager pm(metadata.GetTitleID());
 
     // Load NSO modules
     const VAddr base_address = process.VMManager().GetCodeRegionBaseAddress();
@@ -139,7 +140,7 @@ ResultStatus AppLoader_DeconstructedRomDirectory::Load(Kernel::Process& process)
         const FileSys::VirtualFile module_file = dir->GetFile(module);
         if (module_file != nullptr) {
             const VAddr load_addr = next_load_addr;
-            next_load_addr = AppLoader_NSO::LoadModule(module_file, load_addr);
+            next_load_addr = AppLoader_NSO::LoadModule(module_file, load_addr, pm);
             LOG_DEBUG(Loader, "loaded module {} @ 0x{:X}", module, load_addr);
             // Register module with GDBStub
             GDBStub::RegisterModule(module, load_addr, next_load_addr - 1, false);
diff --git a/src/core/loader/nso.cpp b/src/core/loader/nso.cpp
index cbe2a3e53..2186b02af 100644
--- a/src/core/loader/nso.cpp
+++ b/src/core/loader/nso.cpp
@@ -10,6 +10,7 @@
 #include "common/logging/log.h"
 #include "common/swap.h"
 #include "core/core.h"
+#include "core/file_sys/patch_manager.h"
 #include "core/gdbstub/gdbstub.h"
 #include "core/hle/kernel/kernel.h"
 #include "core/hle/kernel/process.h"
@@ -36,8 +37,7 @@ struct NsoHeader {
     INSERT_PADDING_WORDS(1);
     u8 flags;
     std::array<NsoSegmentHeader, 3> segments; // Text, RoData, Data (in that order)
-    u32_le bss_size;
-    INSERT_PADDING_BYTES(0x1c);
+    std::array<u8, 0x20> build_id;
     std::array<u32_le, 3> segments_compressed_size;
 
     bool IsSegmentCompressed(size_t segment_num) const {
@@ -93,7 +93,8 @@ static constexpr u32 PageAlignSize(u32 size) {
     return (size + Memory::PAGE_MASK) & ~Memory::PAGE_MASK;
 }
 
-VAddr AppLoader_NSO::LoadModule(FileSys::VirtualFile file, VAddr load_base) {
+VAddr AppLoader_NSO::LoadModule(FileSys::VirtualFile file, VAddr load_base,
+                                boost::optional<FileSys::PatchManager> pm) {
     if (file == nullptr)
         return {};
 
@@ -142,6 +143,17 @@ VAddr AppLoader_NSO::LoadModule(FileSys::VirtualFile file, VAddr load_base) {
     const u32 image_size{PageAlignSize(static_cast<u32>(program_image.size()) + bss_size)};
     program_image.resize(image_size);
 
+    // Apply patches if necessary
+    if (pm != boost::none && pm->HasNSOPatch(nso_header.build_id)) {
+        std::vector<u8> pi_header(program_image.size() + 0x100);
+        std::memcpy(pi_header.data(), &nso_header, sizeof(NsoHeader));
+        std::memcpy(pi_header.data() + 0x100, program_image.data(), program_image.size());
+
+        pi_header = pm->PatchNSO(pi_header);
+
+        std::memcpy(program_image.data(), pi_header.data() + 0x100, program_image.size());
+    }
+
     // Load codeset for current process
     codeset->name = file->GetName();
     codeset->memory = std::make_shared<std::vector<u8>>(std::move(program_image));
diff --git a/src/core/loader/nso.h b/src/core/loader/nso.h
index 7f142405b..05353d4d9 100644
--- a/src/core/loader/nso.h
+++ b/src/core/loader/nso.h
@@ -5,6 +5,7 @@
 #pragma once
 
 #include "common/common_types.h"
+#include "core/file_sys/patch_manager.h"
 #include "core/loader/linker.h"
 #include "core/loader/loader.h"
 
@@ -26,7 +27,8 @@ public:
         return IdentifyType(file);
     }
 
-    static VAddr LoadModule(FileSys::VirtualFile file, VAddr load_base);
+    static VAddr LoadModule(FileSys::VirtualFile file, VAddr load_base,
+                            boost::optional<FileSys::PatchManager> pm = boost::none);
 
     ResultStatus Load(Kernel::Process& process) override;
 };