Merge pull request #1499 from lioncash/nro

nro/nso: Minor error handling changes

src/core/loader/deconstructed_rom_directory.cpp

@@ -139,15 +139,23 @@ ResultStatus AppLoader_DeconstructedRomDirectory::Load(Kernel::Process& process)
     for (const auto& module : {"rtld", "main", "subsdk0", "subsdk1", "subsdk2", "subsdk3",
                                "subsdk4", "subsdk5", "subsdk6", "subsdk7", "sdk"}) {
         const FileSys::VirtualFile module_file = dir->GetFile(module);
-        if (module_file != nullptr) {
+        if (module_file == nullptr) {
+            continue;
+        }
+
         const VAddr load_addr = next_load_addr;
-            next_load_addr = AppLoader_NSO::LoadModule(module_file, load_addr,
+        const bool should_pass_arguments = std::strcmp(module, "rtld") == 0;
-                                                       std::strcmp(module, "rtld") == 0, pm);
+        const auto tentative_next_load_addr =
+            AppLoader_NSO::LoadModule(*module_file, load_addr, should_pass_arguments, pm);
+        if (!tentative_next_load_addr) {
+            return ResultStatus::ErrorLoadingNSO;
+        }
+
+        next_load_addr = *tentative_next_load_addr;
         LOG_DEBUG(Loader, "loaded module {} @ 0x{:X}", module, load_addr);
         // Register module with GDBStub
         GDBStub::RegisterModule(module, load_addr, next_load_addr - 1, false);
     }
-    }
 
     process.Run(base_address, metadata.GetMainThreadPriority(), metadata.GetMainThreadStackSize());
 

src/core/loader/loader.cpp

@@ -93,7 +93,7 @@ std::string GetFileTypeString(FileType type) {
     return "unknown";
 }
 
-constexpr std::array<const char*, 59> RESULT_MESSAGES{
+constexpr std::array<const char*, 60> RESULT_MESSAGES{
     "The operation completed successfully.",
     "The loader requested to load is already loaded.",
     "The operation is not implemented.",
@@ -128,6 +128,7 @@ constexpr std::array<const char*, 59> RESULT_MESSAGES{
     "The RomFS could not be found.",
     "The ELF file has incorrect size as determined by the header.",
     "There was a general error loading the NRO into emulated memory.",
+    "There was a general error loading the NSO into emulated memory.",
     "There is no icon available.",
     "There is no control data available.",
     "The NAX file has a bad header.",

src/core/loader/loader.h

@@ -90,6 +90,7 @@ enum class ResultStatus : u16 {
     ErrorNoRomFS,
     ErrorIncorrectELFFileSize,
     ErrorLoadingNRO,
+    ErrorLoadingNSO,
     ErrorNoIcon,
     ErrorNoControl,
     ErrorBadNAXHeader,

src/core/loader/nro.cpp

@@ -127,10 +127,10 @@ static constexpr u32 PageAlignSize(u32 size) {
     return (size + Memory::PAGE_MASK) & ~Memory::PAGE_MASK;
 }
 
-bool AppLoader_NRO::LoadNro(FileSys::VirtualFile file, VAddr load_base) {
+bool AppLoader_NRO::LoadNro(const FileSys::VfsFile& file, VAddr load_base) {
     // Read NSO header
     NroHeader nro_header{};
-    if (sizeof(NroHeader) != file->ReadObject(&nro_header)) {
+    if (sizeof(NroHeader) != file.ReadObject(&nro_header)) {
         return {};
     }
     if (nro_header.magic != Common::MakeMagic('N', 'R', 'O', '0')) {
@@ -138,7 +138,7 @@ bool AppLoader_NRO::LoadNro(FileSys::VirtualFile file, VAddr load_base) {
     }
 
     // Build program image
-    std::vector<u8> program_image = file->ReadBytes(PageAlignSize(nro_header.file_size));
+    std::vector<u8> program_image = file.ReadBytes(PageAlignSize(nro_header.file_size));
     if (program_image.size() != PageAlignSize(nro_header.file_size)) {
         return {};
     }
@@ -182,7 +182,7 @@ bool AppLoader_NRO::LoadNro(FileSys::VirtualFile file, VAddr load_base) {
     Core::CurrentProcess()->LoadModule(std::move(codeset), load_base);
 
     // Register module with GDBStub
-    GDBStub::RegisterModule(file->GetName(), load_base, load_base);
+    GDBStub::RegisterModule(file.GetName(), load_base, load_base);
 
     return true;
 }
@@ -195,7 +195,7 @@ ResultStatus AppLoader_NRO::Load(Kernel::Process& process) {
     // Load NRO
     const VAddr base_address = process.VMManager().GetCodeRegionBaseAddress();
 
-    if (!LoadNro(file, base_address)) {
+    if (!LoadNro(*file, base_address)) {
         return ResultStatus::ErrorLoadingNRO;
     }
 

src/core/loader/nro.h

@@ -41,7 +41,7 @@ public:
     bool IsRomFSUpdatable() const override;
 
 private:
-    bool LoadNro(FileSys::VirtualFile file, VAddr load_base);
+    bool LoadNro(const FileSys::VfsFile& file, VAddr load_base);
 
     std::vector<u8> icon_data;
     std::unique_ptr<FileSys::NACP> nacp;

src/core/loader/nso.cpp

@@ -93,17 +93,14 @@ static constexpr u32 PageAlignSize(u32 size) {
     return (size + Memory::PAGE_MASK) & ~Memory::PAGE_MASK;
 }
 
-VAddr AppLoader_NSO::LoadModule(FileSys::VirtualFile file, VAddr load_base,
+std::optional<VAddr> AppLoader_NSO::LoadModule(const FileSys::VfsFile& file, VAddr load_base,
                                                bool should_pass_arguments,
-                                boost::optional<FileSys::PatchManager> pm) {
+                                               std::optional<FileSys::PatchManager> pm) {
-    if (file == nullptr)
+    if (file.GetSize() < sizeof(NsoHeader))
-        return {};
-
-    if (file->GetSize() < sizeof(NsoHeader))
         return {};
 
     NsoHeader nso_header{};
-    if (sizeof(NsoHeader) != file->ReadObject(&nso_header))
+    if (sizeof(NsoHeader) != file.ReadObject(&nso_header))
         return {};
 
     if (nso_header.magic != Common::MakeMagic('N', 'S', 'O', '0'))
@@ -114,7 +111,7 @@ VAddr AppLoader_NSO::LoadModule(FileSys::VirtualFile file, VAddr load_base,
     std::vector<u8> program_image;
     for (std::size_t i = 0; i < nso_header.segments.size(); ++i) {
         std::vector<u8> data =
-            file->ReadBytes(nso_header.segments_compressed_size[i], nso_header.segments[i].offset);
+            file.ReadBytes(nso_header.segments_compressed_size[i], nso_header.segments[i].offset);
         if (nso_header.IsSegmentCompressed(i)) {
             data = DecompressSegment(data, nso_header.segments[i]);
         }
@@ -157,7 +154,7 @@ VAddr AppLoader_NSO::LoadModule(FileSys::VirtualFile file, VAddr load_base,
     program_image.resize(image_size);
 
     // Apply patches if necessary
-    if (pm != boost::none && pm->HasNSOPatch(nso_header.build_id)) {
+    if (pm && 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());
@@ -172,7 +169,7 @@ VAddr AppLoader_NSO::LoadModule(FileSys::VirtualFile file, VAddr load_base,
     Core::CurrentProcess()->LoadModule(std::move(codeset), load_base);
 
     // Register module with GDBStub
-    GDBStub::RegisterModule(file->GetName(), load_base, load_base);
+    GDBStub::RegisterModule(file.GetName(), load_base, load_base);
 
     return load_base + image_size;
 }
@@ -184,7 +181,9 @@ ResultStatus AppLoader_NSO::Load(Kernel::Process& process) {
 
     // Load module
     const VAddr base_address = process.VMManager().GetCodeRegionBaseAddress();
-    LoadModule(file, base_address, true);
+    if (!LoadModule(*file, base_address, true)) {
+        return ResultStatus::ErrorLoadingNSO;
+    }
     LOG_DEBUG(Loader, "loaded module {} @ 0x{:X}", file->GetName(), base_address);
 
     process.Run(base_address, Kernel::THREADPRIO_DEFAULT, Memory::DEFAULT_STACK_SIZE);

src/core/loader/nso.h

@@ -4,6 +4,7 @@
 
 #pragma once
 
+#include <optional>
 #include "common/common_types.h"
 #include "core/file_sys/patch_manager.h"
 #include "core/loader/linker.h"
@@ -36,8 +37,9 @@ public:
         return IdentifyType(file);
     }
 
-    static VAddr LoadModule(FileSys::VirtualFile file, VAddr load_base, bool should_pass_arguments,
+    static std::optional<VAddr> LoadModule(const FileSys::VfsFile& file, VAddr load_base,
-                            boost::optional<FileSys::PatchManager> pm = boost::none);
+                                           bool should_pass_arguments,
+                                           std::optional<FileSys::PatchManager> pm = {});
 
     ResultStatus Load(Kernel::Process& process) override;
 };