From c3548967b1fbc818a495dda72ef135b71b44e002 Mon Sep 17 00:00:00 2001
From: Zach Hilman <zachhilman@gmail.com>
Date: Wed, 5 Jun 2019 00:21:17 -0400
Subject: loader: Add AppLoader_KIP for KIP files

---
 src/core/CMakeLists.txt |  2 +
 src/core/loader/kip.cpp | 98 +++++++++++++++++++++++++++++++++++++++++++++++++
 src/core/loader/kip.h   | 35 ++++++++++++++++++
 3 files changed, 135 insertions(+)
 create mode 100644 src/core/loader/kip.cpp
 create mode 100644 src/core/loader/kip.h

diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index 623a44e0c..60caf288d 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -437,6 +437,8 @@ add_library(core STATIC
     loader/deconstructed_rom_directory.h
     loader/elf.cpp
     loader/elf.h
+    loader/kip.cpp
+    loader/kip.h
     loader/loader.cpp
     loader/loader.h
     loader/nax.cpp
diff --git a/src/core/loader/kip.cpp b/src/core/loader/kip.cpp
new file mode 100644
index 000000000..2efd14f04
--- /dev/null
+++ b/src/core/loader/kip.cpp
@@ -0,0 +1,98 @@
+// Copyright 2019 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/file_sys/kernel_executable.h"
+#include "core/file_sys/program_metadata.h"
+#include "core/gdbstub/gdbstub.h"
+#include "core/hle/kernel/code_set.h"
+#include "core/hle/kernel/process.h"
+#include "core/loader/kip.h"
+
+namespace Loader {
+
+namespace {
+constexpr u32 PageAlignSize(u32 size) {
+    return (size + Memory::PAGE_MASK) & ~Memory::PAGE_MASK;
+}
+} // Anonymous namespace
+
+AppLoader_KIP::AppLoader_KIP(FileSys::VirtualFile file_)
+    : AppLoader(std::move(file_)), kip(std::make_unique<FileSys::KIP>(file)) {}
+
+AppLoader_KIP::~AppLoader_KIP() = default;
+
+FileType AppLoader_KIP::IdentifyType(const FileSys::VirtualFile& file) {
+    u32_le magic{};
+    if (file->GetSize() < sizeof(u32) || file->ReadObject(&magic) != sizeof(u32)) {
+        return FileType::Error;
+    }
+
+    if (magic == Common::MakeMagic('K', 'I', 'P', '1')) {
+        return FileType::KIP;
+    }
+
+    return FileType::Error;
+}
+
+FileType AppLoader_KIP::GetFileType() const {
+    return (kip != nullptr && kip->GetStatus() == ResultStatus::Success) ? FileType::KIP
+                                                                         : FileType::Error;
+}
+
+AppLoader::LoadResult AppLoader_KIP::Load(Kernel::Process& process) {
+    if (is_loaded) {
+        return {ResultStatus::ErrorAlreadyLoaded, {}};
+    }
+
+    if (kip == nullptr) {
+        return {ResultStatus::ErrorNullFile, {}};
+    }
+
+    if (kip->GetStatus() != ResultStatus::Success) {
+        return {kip->GetStatus(), {}};
+    }
+
+    const auto address_space =
+        kip->Is64Bit() ? (kip->Is39BitAddressSpace() ? FileSys::ProgramAddressSpaceType::Is39Bit
+                                                     : FileSys::ProgramAddressSpaceType::Is36Bit)
+                       : FileSys::ProgramAddressSpaceType::Is32Bit;
+
+    FileSys::ProgramMetadata metadata;
+    metadata.LoadManual(kip->Is64Bit(), address_space, kip->GetMainThreadPriority(),
+                        kip->GetMainThreadCpuCore(), kip->GetMainThreadStackSize(),
+                        kip->GetTitleID(), 0xFFFFFFFFFFFFFFFF, kip->GetKernelCapabilities());
+
+    const VAddr base_address = process.VMManager().GetCodeRegionBaseAddress();
+    Kernel::CodeSet codeset;
+    std::vector<u8> program_image;
+
+    const auto load_segment = [&program_image](Kernel::CodeSet::Segment& segment,
+                                               const std::vector<u8>& data, u32 offset) {
+        segment.addr = offset;
+        segment.offset = offset;
+        segment.size = PageAlignSize(static_cast<u32>(data.size()));
+        program_image.resize(offset);
+        program_image.insert(program_image.end(), data.begin(), data.end());
+    };
+
+    load_segment(codeset.CodeSegment(), kip->GetTextSection(), kip->GetTextOffset());
+    load_segment(codeset.RODataSegment(), kip->GetRODataSection(), kip->GetRODataOffset());
+    load_segment(codeset.DataSegment(), kip->GetDataSection(), kip->GetDataOffset());
+
+    program_image.resize(PageAlignSize(kip->GetBSSOffset()) + kip->GetBSSSize());
+    codeset.DataSegment().size += kip->GetBSSSize();
+
+    GDBStub::RegisterModule(kip->GetName(), base_address, base_address + program_image.size());
+
+    codeset.memory = std::move(program_image);
+    process.LoadModule(std::move(codeset), base_address);
+
+    LOG_DEBUG(Loader, "loaded module {} @ 0x{:X}", kip->GetName(), base_address);
+
+    is_loaded = true;
+    return {ResultStatus::Success,
+            LoadParameters{kip->GetMainThreadPriority(), kip->GetMainThreadStackSize()}};
+}
+
+} // namespace Loader
diff --git a/src/core/loader/kip.h b/src/core/loader/kip.h
new file mode 100644
index 000000000..12ca40269
--- /dev/null
+++ b/src/core/loader/kip.h
@@ -0,0 +1,35 @@
+// Copyright 2019 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "core/loader/loader.h"
+
+namespace FileSys {
+class KIP;
+}
+
+namespace Loader {
+
+class AppLoader_KIP final : public AppLoader {
+public:
+    explicit AppLoader_KIP(FileSys::VirtualFile file);
+    ~AppLoader_KIP() override;
+
+    /**
+     * Returns the type of the file
+     * @param file std::shared_ptr<VfsFile> open file
+     * @return FileType found, or FileType::Error if this loader doesn't know it
+     */
+    static FileType IdentifyType(const FileSys::VirtualFile& file);
+
+    FileType GetFileType() const override;
+
+    LoadResult Load(Kernel::Process& process) override;
+
+private:
+    std::unique_ptr<FileSys::KIP> kip;
+};
+
+} // namespace Loader
-- 
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