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-rw-r--r--src/core/CMakeLists.txt2
-rw-r--r--src/core/loader/loader.cpp6
-rw-r--r--src/core/loader/loader.h1
-rw-r--r--src/core/loader/nso.cpp295
-rw-r--r--src/core/loader/nso.h38
5 files changed, 342 insertions, 0 deletions
diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index 44d7f670b..f8bc1fdd0 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -176,6 +176,7 @@ set(SRCS
loader/elf.cpp
loader/loader.cpp
loader/ncch.cpp
+ loader/nso.cpp
loader/smdh.cpp
tracer/recorder.cpp
memory.cpp
@@ -375,6 +376,7 @@ set(HEADERS
loader/elf.h
loader/loader.h
loader/ncch.h
+ loader/nso.h
loader/smdh.h
tracer/recorder.h
tracer/citrace.h
diff --git a/src/core/loader/loader.cpp b/src/core/loader/loader.cpp
index be719d74c..d309e7c9e 100644
--- a/src/core/loader/loader.cpp
+++ b/src/core/loader/loader.cpp
@@ -10,6 +10,7 @@
#include "core/loader/3dsx.h"
#include "core/loader/elf.h"
#include "core/loader/ncch.h"
+#include "core/loader/nso.h"
////////////////////////////////////////////////////////////////////////////////////////////////////
@@ -32,6 +33,7 @@ FileType IdentifyFile(FileUtil::IOFile& file) {
CHECK_TYPE(THREEDSX)
CHECK_TYPE(ELF)
CHECK_TYPE(NCCH)
+ CHECK_TYPE(NSO)
#undef CHECK_TYPE
@@ -115,6 +117,10 @@ static std::unique_ptr<AppLoader> GetFileLoader(FileUtil::IOFile&& file, FileTyp
case FileType::CCI:
return std::make_unique<AppLoader_NCCH>(std::move(file), filepath);
+ // NX NSO file format.
+ case FileType::NSO:
+ return std::make_unique<AppLoader_NSO>(std::move(file), filename, filepath);
+
default:
return nullptr;
}
diff --git a/src/core/loader/loader.h b/src/core/loader/loader.h
index 48bbf687d..79a3bd498 100644
--- a/src/core/loader/loader.h
+++ b/src/core/loader/loader.h
@@ -32,6 +32,7 @@ enum class FileType {
CIA,
ELF,
THREEDSX, // 3DSX
+ NSO,
};
/**
diff --git a/src/core/loader/nso.cpp b/src/core/loader/nso.cpp
new file mode 100644
index 000000000..ca8c59cd5
--- /dev/null
+++ b/src/core/loader/nso.cpp
@@ -0,0 +1,295 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <map>
+#include <string>
+#include <vector>
+#include <lz4.h>
+
+#include "common/logging/log.h"
+#include "common/swap.h"
+#include "core/hle/kernel/process.h"
+#include "core/hle/kernel/resource_limit.h"
+#include "core/loader/nso.h"
+#include "core/memory.h"
+
+using Kernel::CodeSet;
+using Kernel::SharedPtr;
+
+namespace Loader {
+
+FileType AppLoader_NSO::IdentifyType(FileUtil::IOFile& file) {
+ u32 magic = 0;
+ file.Seek(0, SEEK_SET);
+ if (1 != file.ReadArray<u32>(&magic, 1))
+ return FileType::Error;
+
+ if (MakeMagic('N', 'S', 'O', '0') == magic)
+ return FileType::NSO;
+
+ return FileType::Error;
+}
+
+struct NsoSegmentHeader {
+ u32_le offset;
+ u32_le location;
+ u32_le size;
+ u32_le alignment;
+};
+static_assert(sizeof(NsoSegmentHeader) == 0x10, "NsoSegmentHeader has incorrect size.");
+
+struct NsoHeader {
+ u32_le magic;
+ INSERT_PADDING_BYTES(0xc);
+ std::array<NsoSegmentHeader, 3> segments; // Text, Data, RoData (in that order)
+ INSERT_PADDING_BYTES(0x20);
+ std::array<u32_le, 3> segments_compressed_size;
+};
+
+static_assert(sizeof(NsoHeader) == 0x6c, "NsoHeader has incorrect size.");
+
+static std::vector<u8> ReadSegment(FileUtil::IOFile& file, const NsoSegmentHeader& header,
+ int compressed_size) {
+ std::vector<u8> compressed_data;
+ compressed_data.resize(compressed_size);
+
+ file.Seek(header.offset, SEEK_SET);
+ if (compressed_size != file.ReadBytes(compressed_data.data(), compressed_size)) {
+ LOG_CRITICAL(Loader, "Failed to read %d NSO LZ4 compressed bytes", compressed_size);
+ return {};
+ }
+
+ std::vector<u8> uncompressed_data;
+ uncompressed_data.resize(header.size);
+ const int bytes_uncompressed =
+ LZ4_decompress_safe_partial(reinterpret_cast<const char*>(compressed_data.data()),
+ reinterpret_cast<char*>(uncompressed_data.data()),
+ compressed_size, header.size, header.size);
+
+ ASSERT_MSG(bytes_uncompressed == header.size, "%d != %d", bytes_uncompressed, header.size);
+
+ return uncompressed_data;
+}
+
+struct Symbol {
+ Symbol(std::string&& name, u64 value) : name(std::move(name)), value(value) {}
+ std::string name;
+ u64 value;
+};
+
+struct Import {
+ VAddr ea;
+ s64 addend;
+};
+
+enum class RelocationType : u32 {
+ ABS64 = 257,
+ GLOB_DAT = 1025,
+ JUMP_SLOT = 1026,
+ RELATIVE = 1027
+};
+
+enum DynamicType : u32 {
+ DT_NULL = 0,
+ DT_PLTRELSZ = 2,
+ DT_STRTAB = 5,
+ DT_SYMTAB = 6,
+ DT_RELA = 7,
+ DT_RELASZ = 8,
+ DT_STRSZ = 10,
+ DT_JMPREL = 23,
+};
+
+void WriteRelocations(const std::vector<Symbol>& symbols, VAddr loadbase, u64 roff, u64 size,
+ bool is_jump_relocation, std::map<std::string, Import>& imports,
+ std::map<std::string, VAddr>& exports) {
+ for (u64 i = 0; i < size; i += 0x18) {
+ VAddr addr = loadbase + roff + i;
+ u64 offset = Memory::Read64(addr);
+ u64 info = Memory::Read64(addr + 8);
+ u64 addend_unsigned = Memory::Read64(addr + 16);
+ s64 addend{};
+ std::memcpy(&addend, &addend_unsigned, sizeof(u64));
+
+ RelocationType rtype = static_cast<RelocationType>(info & 0xFFFFFFFF);
+ u32 rsym = static_cast<u32>(info >> 32);
+ VAddr ea = loadbase + offset;
+
+ const Symbol& symbol = symbols[rsym];
+
+ switch (rtype) {
+ case RelocationType::RELATIVE:
+ if (!symbol.name.empty()) {
+ exports[symbol.name] = loadbase + addend;
+ }
+ Memory::Write64(ea, loadbase + addend);
+ break;
+ case RelocationType::JUMP_SLOT:
+ case RelocationType::GLOB_DAT:
+ if (!symbol.value) {
+ imports[symbol.name] = {ea, 0};
+ } else {
+ exports[symbol.name] = symbol.value;
+ Memory::Write64(ea, symbol.value);
+ }
+ break;
+ case RelocationType::ABS64:
+ if (!symbol.value) {
+ imports[symbol.name] = {ea, addend};
+ } else {
+ exports[symbol.name] = symbol.value + addend;
+ Memory::Write64(ea, symbol.value + addend);
+ }
+ break;
+ default:
+ LOG_CRITICAL(Loader, "Unknown relocation type: %d", rtype);
+ break;
+ }
+ }
+}
+
+void Relocate(VAddr loadbase, std::map<std::string, Import>& imports,
+ std::map<std::string, VAddr>& exports) {
+ u32 modoff = Memory::Read32(loadbase + 4);
+ ASSERT_MSG(Memory::Read32(loadbase + modoff) == MakeMagic('M', 'O', 'D', '0'),
+ "Expected MOD section");
+
+ u64 dynoff = loadbase + modoff + Memory::Read32(loadbase + modoff + 4);
+ std::map<u64, u64> dynamic;
+ while (1) {
+ u64 tag = Memory::Read64(dynoff);
+ u64 value = Memory::Read64(dynoff + 8);
+ dynoff += 16;
+
+ if (tag == DT_NULL) {
+ break;
+ }
+ dynamic[tag] = value;
+ }
+
+ u64 strtabsize = dynamic[DT_STRSZ];
+ std::vector<u8> strtab;
+ strtab.resize(strtabsize);
+ Memory::ReadBlock(loadbase + dynamic[DT_STRTAB], strtab.data(), strtabsize);
+
+ VAddr addr = loadbase + dynamic[DT_SYMTAB];
+ std::vector<Symbol> symbols;
+ while (1) {
+ const u32 stname = Memory::Read32(addr);
+ const u16 stshndx = Memory::Read16(addr + 6);
+ const u64 stvalue = Memory::Read64(addr + 8);
+ addr += 24;
+
+ if (stname >= strtabsize) {
+ break;
+ }
+
+ std::string name = reinterpret_cast<char*>(&strtab[stname]);
+ if (stvalue) {
+ exports[name] = loadbase + stvalue;
+ symbols.emplace_back(std::move(name), loadbase + stvalue);
+ } else {
+ symbols.emplace_back(std::move(name), 0);
+ }
+ }
+
+ if (dynamic.find(DT_RELA) != dynamic.end()) {
+ WriteRelocations(symbols, loadbase, dynamic[DT_RELA], dynamic[DT_RELASZ], false, imports,
+ exports);
+ }
+
+ if (dynamic.find(DT_JMPREL) != dynamic.end()) {
+ WriteRelocations(symbols, loadbase, dynamic[DT_JMPREL], dynamic[DT_PLTRELSZ], true, imports,
+ exports);
+ }
+}
+
+static VAddr GetEntryPoint(const std::map<std::string, VAddr>& exports) {
+ // Find nnMain function, set entrypoint to that address
+ const auto& search = exports.find("nnMain");
+ if (search != exports.end()) {
+ return search->second;
+ }
+ return {};
+}
+
+static SharedPtr<CodeSet> LoadModule(const std::string& filepath, VAddr loadbase,
+ std::map<std::string, Import>& imports,
+ std::map<std::string, VAddr>& exports) {
+ FileUtil::IOFile file(filepath, "rb");
+
+ if (!file.IsOpen())
+ return {};
+
+ NsoHeader header{};
+ file.Seek(0, SEEK_SET);
+ if (sizeof(NsoHeader) != file.ReadBytes(&header, sizeof(NsoHeader)))
+ return {};
+
+ // Build program image
+ SharedPtr<CodeSet> codeset = CodeSet::Create("", 0);
+ std::vector<u8> program_image;
+ for (int i = 0; i < header.segments.size(); ++i) {
+ std::vector<u8> data =
+ ReadSegment(file, header.segments[i], header.segments_compressed_size[i]);
+ program_image.resize(header.segments[i].location);
+ program_image.insert(program_image.end(), data.begin(), data.end());
+ codeset->segments[i].addr = header.segments[i].location;
+ codeset->segments[i].offset = header.segments[i].location;
+ codeset->segments[i].size = (data.size() + Memory::PAGE_MASK) & ~Memory::PAGE_MASK;
+ }
+ program_image.resize((program_image.size() + Memory::PAGE_MASK) & ~Memory::PAGE_MASK);
+
+ codeset->name = filepath;
+ codeset->entrypoint = 0; // Set after relocation
+ codeset->memory = std::make_shared<std::vector<u8>>(std::move(program_image));
+
+ return codeset;
+}
+
+ResultStatus AppLoader_NSO::Load() {
+ if (is_loaded)
+ return ResultStatus::ErrorAlreadyLoaded;
+
+ if (!file.IsOpen())
+ return ResultStatus::Error;
+
+ static constexpr VAddr loadbase = 0x7100000000;
+ std::map<std::string, Import> imports;
+ std::map<std::string, VAddr> exports;
+
+ // Load and relocate "main" NSO
+ auto codeset = LoadModule(filepath, loadbase, imports, exports);
+ Kernel::g_current_process = Kernel::Process::Create(codeset);
+ Kernel::g_current_process->svc_access_mask.set();
+ Kernel::g_current_process->address_mappings = default_address_mappings;
+ Kernel::g_current_process->resource_limit =
+ Kernel::ResourceLimit::GetForCategory(Kernel::ResourceLimitCategory::APPLICATION);
+ Kernel::g_current_process->LoadModule(codeset, loadbase);
+ Relocate(loadbase, imports, exports);
+ codeset->entrypoint = GetEntryPoint(exports);
+ Kernel::g_current_process->Run(48, Kernel::DEFAULT_STACK_SIZE);
+
+ // Load and relocate "sdk" NSO
+ static constexpr VAddr sdkbase = 0x7200000000;
+ const std::string sdkpath = filepath.substr(0, filepath.find_last_of("/\\")) + "/sdk";
+ auto sdk_codeset = LoadModule(sdkpath, sdkbase, imports, exports);
+ Kernel::g_current_process->LoadModule(sdk_codeset, sdkbase);
+ Relocate(sdkbase, imports, exports);
+
+ // Resolve imports
+ for (const auto& import : imports) {
+ const auto& search = exports.find(import.first);
+ if (search != exports.end()) {
+ Memory::Write64(import.second.ea, search->second + import.second.addend);
+ } else {
+ LOG_CRITICAL(Loader, "Unresolved import: %s", import.first.c_str());
+ }
+ }
+
+ is_loaded = true;
+ return ResultStatus::Success;
+}
+
+} // namespace Loader
diff --git a/src/core/loader/nso.h b/src/core/loader/nso.h
new file mode 100644
index 000000000..39a9bd3d9
--- /dev/null
+++ b/src/core/loader/nso.h
@@ -0,0 +1,38 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <string>
+#include "common/common_types.h"
+#include "common/file_util.h"
+#include "core/loader/loader.h"
+
+namespace Loader {
+
+/// Loads an NSO file
+class AppLoader_NSO final : public AppLoader {
+public:
+ AppLoader_NSO(FileUtil::IOFile&& file, std::string filename, std::string filepath)
+ : AppLoader(std::move(file)), filename(std::move(filename)), filepath(std::move(filepath)) {}
+
+ /**
+ * Returns the type of the file
+ * @param file FileUtil::IOFile open file
+ * @return FileType found, or FileType::Error if this loader doesn't know it
+ */
+ static FileType IdentifyType(FileUtil::IOFile& file);
+
+ FileType GetFileType() override {
+ return IdentifyType(file);
+ }
+
+ ResultStatus Load() override;
+
+private:
+ std::string filename;
+ std::string filepath;
+};
+
+} // namespace Loader
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