LDR: power on service functions

src/core/hle/service/ldr_ro.cpp

@@ -2083,13 +2083,24 @@ public:
 
 static MemorySynchronizer memory_synchronizer;
 
+// TODO(wwylele): this should be in the per-client storage when we implement multi-process
+static VAddr loaded_crs; ///< the virtual address of the static module
+
+static bool VerifyBufferState(VAddr buffer_ptr, u32 size) {
+    auto vma = Kernel::g_current_process->vm_manager.FindVMA(buffer_ptr);
+    return vma != Kernel::g_current_process->vm_manager.vma_map.end()
+        && vma->second.base + vma->second.size >= buffer_ptr + size
+        && vma->second.permissions == Kernel::VMAPermission::ReadWrite
+        && vma->second.meminfo_state == Kernel::MemoryState::Private;
+}
+
 /**
  * LDR_RO::Initialize service function
  *  Inputs:
  *      1 : CRS buffer pointer
  *      2 : CRS Size
  *      3 : Process memory address where the CRS will be mapped
- *      4 : Value, must be zero
+ *      4 : handle translation descriptor (zero)
  *      5 : KProcess handle
  *  Outputs:
  *      0 : Return header
@@ -2097,30 +2108,118 @@ static MemorySynchronizer memory_synchronizer;
  */
 static void Initialize(Service::Interface* self) {
     u32* cmd_buff = Kernel::GetCommandBuffer();
-    u32 crs_buffer_ptr = cmd_buff[1];
+    VAddr crs_buffer_ptr = cmd_buff[1];
     u32 crs_size         = cmd_buff[2];
-    u32 address        = cmd_buff[3];
+    VAddr crs_address    = cmd_buff[3];
-    u32 value          = cmd_buff[4];
+    u32 descriptor       = cmd_buff[4];
     u32 process          = cmd_buff[5];
 
-    if (value != 0) {
+    LOG_DEBUG(Service_LDR, "called, crs_buffer_ptr=0x%08X, crs_address=0x%08X, crs_size=0x%X, descriptor=0x%08X, process=0x%08X",
-        LOG_ERROR(Service_LDR, "This value should be zero, but is actually %u!", value);
+                crs_buffer_ptr, crs_address, crs_size, descriptor, process);
+
+    if (descriptor != 0) {
+        LOG_ERROR(Service_LDR, "IPC handle descriptor failed validation (0x%X)", descriptor);
+        cmd_buff[0] = IPC::MakeHeader(0, 1, 0);
+        cmd_buff[1] = ERROR_INVALID_DESCRIPTOR.raw;
+        return;
     }
 
-    // TODO(purpasmart96): Verify return header on HW
+    cmd_buff[0] = IPC::MakeHeader(1, 1, 0);
 
-    cmd_buff[1] = RESULT_SUCCESS.raw; // No error
+    if (loaded_crs) {
+        LOG_ERROR(Service_LDR, "Already initialized");
+        cmd_buff[1] = ERROR_ALREADY_INITIALIZED.raw;
+        return;
+    }
 
-    LOG_WARNING(Service_LDR, "(STUBBED) called. crs_buffer_ptr=0x%08X, crs_size=0x%08X, address=0x%08X, value=0x%08X, process=0x%08X",
+    if (crs_size < CRO_HEADER_SIZE) {
-                crs_buffer_ptr, crs_size, address, value, process);
+        LOG_ERROR(Service_LDR, "CRS is too small");
+        cmd_buff[1] = ERROR_BUFFER_TOO_SMALL.raw;
+        return;
+    }
+
+    if (crs_buffer_ptr & Memory::PAGE_MASK) {
+        LOG_ERROR(Service_LDR, "CRS original address is not aligned");
+        cmd_buff[1] = ERROR_MISALIGNED_ADDRESS.raw;
+        return;
+    }
+
+    if (crs_address & Memory::PAGE_MASK) {
+        LOG_ERROR(Service_LDR, "CRS mapping address is not aligned");
+        cmd_buff[1] = ERROR_MISALIGNED_ADDRESS.raw;
+        return;
+    }
+
+    if (crs_size & Memory::PAGE_MASK) {
+        LOG_ERROR(Service_LDR, "CRS size is not aligned");
+        cmd_buff[1] = ERROR_MISALIGNED_SIZE.raw;
+        return;
+    }
+
+    if (!VerifyBufferState(crs_buffer_ptr, crs_size)) {
+        LOG_ERROR(Service_LDR, "CRS original buffer is in invalid state");
+        cmd_buff[1] = ERROR_INVALID_MEMORY_STATE.raw;
+        return;
+    }
+
+    if (crs_address < Memory::PROCESS_IMAGE_VADDR || crs_address + crs_size > Memory::PROCESS_IMAGE_VADDR_END) {
+        LOG_ERROR(Service_LDR, "CRS mapping address is not in the process image region");
+        cmd_buff[1] = ERROR_ILLEGAL_ADDRESS.raw;
+        return;
+    }
+
+    ResultCode result = RESULT_SUCCESS;
+
+    if (crs_buffer_ptr != crs_address) {
+        // TODO(wwylele): should be memory aliasing
+        std::shared_ptr<std::vector<u8>> crs_mem = std::make_shared<std::vector<u8>>(crs_size);
+        Memory::ReadBlock(crs_buffer_ptr, crs_mem->data(), crs_size);
+        result = Kernel::g_current_process->vm_manager.MapMemoryBlock(crs_address, crs_mem, 0, crs_size, Kernel::MemoryState::Code).Code();
+        if (result.IsError()) {
+            LOG_ERROR(Service_LDR, "Error mapping memory block %08X", result.raw);
+            cmd_buff[1] = result.raw;
+            return;
+        }
+
+        result = Kernel::g_current_process->vm_manager.ReprotectRange(crs_address, crs_size, Kernel::VMAPermission::Read);
+        if (result.IsError()) {
+            LOG_ERROR(Service_LDR, "Error reprotecting memory block %08X", result.raw);
+            cmd_buff[1] = result.raw;
+            return;
+        }
+
+        memory_synchronizer.AddMemoryBlock(crs_address, crs_buffer_ptr, crs_size);
+    } else {
+        // Do nothing if buffer_ptr == address
+        // TODO(wwylele): verify this behaviour. This is only seen in the web browser app,
+        //     and the actual behaviour is unclear. "Do nothing" is probably an incorrect implement.
+        //     There is also a chance that another issue causes the app passing wrong arguments.
+        LOG_WARNING(Service_LDR, "crs_buffer_ptr == crs_address (0x%08X)", crs_address);
+    }
+
+    CROHelper crs(crs_address);
+    crs.InitCRS();
+
+    result = crs.Rebase(0, crs_size, 0, 0, 0, 0, true);
+    if (result.IsError()) {
+        LOG_ERROR(Service_LDR, "Error rebasing CRS 0x%08X", result.raw);
+        cmd_buff[1] = result.raw;
+        return;
+    }
+
+    memory_synchronizer.SynchronizeOriginalMemory();
+
+    loaded_crs = crs_address;
+
+    cmd_buff[1] = RESULT_SUCCESS.raw;
 }
 
 /**
  * LDR_RO::LoadCRR service function
  *  Inputs:
- *      1 : CRS buffer pointer
+ *      1 : CRR buffer pointer
- *      2 : CRS Size
+ *      2 : CRR Size
- *      3 : Value, must be zero
+ *      3 : handle translation descriptor (zero)
  *      4 : KProcess handle
  *  Outputs:
  *      0 : Return header
@@ -2128,33 +2227,560 @@ static void Initialize(Service::Interface* self) {
  */
 static void LoadCRR(Service::Interface* self) {
     u32* cmd_buff = Kernel::GetCommandBuffer();
-    u32 crs_buffer_ptr = cmd_buff[1];
+    u32 crr_buffer_ptr = cmd_buff[1];
-    u32 crs_size       = cmd_buff[2];
+    u32 crr_size       = cmd_buff[2];
-    u32 value          = cmd_buff[3];
+    u32 descriptor     = cmd_buff[3];
     u32 process        = cmd_buff[4];
 
-    if (value != 0) {
+    if (descriptor != 0) {
-        LOG_ERROR(Service_LDR, "This value should be zero, but is actually %u!", value);
+        LOG_ERROR(Service_LDR, "IPC handle descriptor failed validation (0x%X)", descriptor);
+        cmd_buff[0] = IPC::MakeHeader(0, 1, 0);
+        cmd_buff[1] = ERROR_INVALID_DESCRIPTOR.raw;
+        return;
     }
 
-    // TODO(purpasmart96): Verify return header on HW
+    cmd_buff[0] = IPC::MakeHeader(2, 1, 0);
 
     cmd_buff[1] = RESULT_SUCCESS.raw; // No error
 
-    LOG_WARNING(Service_LDR, "(STUBBED) called. crs_buffer_ptr=0x%08X, crs_size=0x%08X, value=0x%08X, process=0x%08X",
+    LOG_WARNING(Service_LDR, "(STUBBED) called, crr_buffer_ptr=0x%08X, crr_size=0x%08X, descriptor=0x%08X, process=0x%08X",
-                crs_buffer_ptr, crs_size, value, process);
+                crr_buffer_ptr, crr_size, descriptor, process);
+}
+
+/**
+ * LDR_RO::UnloadCRR service function
+ *  Inputs:
+ *      1 : CRR buffer pointer
+ *      2 : handle translation descriptor (zero)
+ *      3 : KProcess handle
+ *  Outputs:
+ *      0 : Return header
+ *      1 : Result of function, 0 on success, otherwise error code
+ */
+static void UnloadCRR(Service::Interface* self) {
+    u32* cmd_buff = Kernel::GetCommandBuffer();
+    u32 crr_buffer_ptr = cmd_buff[1];
+    u32 descriptor     = cmd_buff[2];
+    u32 process        = cmd_buff[3];
+
+    if (descriptor != 0) {
+        LOG_ERROR(Service_LDR, "IPC handle descriptor failed validation (0x%X)", descriptor);
+        cmd_buff[0] = IPC::MakeHeader(0, 1, 0);
+        cmd_buff[1] = ERROR_INVALID_DESCRIPTOR.raw;
+        return;
+    }
+
+    cmd_buff[0] = IPC::MakeHeader(3, 1, 0);
+
+    cmd_buff[1] = RESULT_SUCCESS.raw; // No error
+
+    LOG_WARNING(Service_LDR, "(STUBBED) called, crr_buffer_ptr=0x%08X, descriptor=0x%08X, process=0x%08X",
+                crr_buffer_ptr, descriptor, process);
+}
+
+/**
+ * LDR_RO::LoadCRO service function
+ *  Inputs:
+ *      1 : CRO buffer pointer
+ *      2 : memory address where the CRO will be mapped
+ *      3 : CRO Size
+ *      4 : .data segment buffer pointer
+ *      5 : must be zero
+ *      6 : .data segment buffer size
+ *      7 : .bss segment buffer pointer
+ *      8 : .bss segment buffer size
+ *      9 : (bool) register CRO as auto-link module
+ *     10 : fix level
+ *     11 : CRR address (zero if use loaded CRR)
+ *     12 : handle translation descriptor (zero)
+ *     13 : KProcess handle
+ *  Outputs:
+ *      0 : Return header
+ *      1 : Result of function, 0 on success, otherwise error code
+ *      2 : CRO fixed size
+ *  Note:
+ *      This service function has two versions. The function defined here is a
+ *      unified one of two, with an additional parameter link_on_load_bug_fix.
+ *      There is a dispatcher template below.
+ */
+static void LoadCRO(Service::Interface* self, bool link_on_load_bug_fix) {
+    u32* cmd_buff = Kernel::GetCommandBuffer();
+    VAddr cro_buffer_ptr       = cmd_buff[1];
+    VAddr cro_address          = cmd_buff[2];
+    u32 cro_size               = cmd_buff[3];
+    VAddr data_segment_address = cmd_buff[4];
+    u32 zero                   = cmd_buff[5];
+    u32 data_segment_size      = cmd_buff[6];
+    u32 bss_segment_address    = cmd_buff[7];
+    u32 bss_segment_size       = cmd_buff[8];
+    bool auto_link             = (cmd_buff[9] & 0xFF) != 0;
+    u32 fix_level              = cmd_buff[10];
+    VAddr crr_address          = cmd_buff[11];
+    u32 descriptor             = cmd_buff[12];
+    u32 process                = cmd_buff[13];
+
+    LOG_DEBUG(Service_LDR, "called (%s), cro_buffer_ptr=0x%08X, cro_address=0x%08X, cro_size=0x%X, "
+        "data_segment_address=0x%08X, zero=%d, data_segment_size=0x%X, bss_segment_address=0x%08X, bss_segment_size=0x%X, "
+        "auto_link=%s, fix_level=%d, crr_address=0x%08X, descriptor=0x%08X, process=0x%08X",
+        link_on_load_bug_fix ? "new" : "old", cro_buffer_ptr, cro_address, cro_size,
+        data_segment_address, zero, data_segment_size, bss_segment_address, bss_segment_size,
+        auto_link ? "true" : "false", fix_level, crr_address, descriptor, process
+        );
+
+    if (descriptor != 0) {
+        LOG_ERROR(Service_LDR, "IPC handle descriptor failed validation (0x%X)", descriptor);
+        cmd_buff[0] = IPC::MakeHeader(0, 1, 0);
+        cmd_buff[1] = ERROR_INVALID_DESCRIPTOR.raw;
+        return;
+    }
+
+    memory_synchronizer.SynchronizeMappingMemory();
+
+    cmd_buff[0] = IPC::MakeHeader(link_on_load_bug_fix ? 9 : 4, 2, 0);
+
+    if (!loaded_crs) {
+        LOG_ERROR(Service_LDR, "Not initialized");
+        cmd_buff[1] = ERROR_NOT_INITIALIZED.raw;
+        return;
+    }
+
+    if (cro_size < CRO_HEADER_SIZE) {
+        LOG_ERROR(Service_LDR, "CRO too small");
+        cmd_buff[1] = ERROR_BUFFER_TOO_SMALL.raw;
+        return;
+    }
+
+    if (cro_buffer_ptr & Memory::PAGE_MASK) {
+        LOG_ERROR(Service_LDR, "CRO original address is not aligned");
+        cmd_buff[1] = ERROR_MISALIGNED_ADDRESS.raw;
+        return;
+    }
+
+    if (cro_address & Memory::PAGE_MASK) {
+        LOG_ERROR(Service_LDR, "CRO mapping address is not aligned");
+        cmd_buff[1] = ERROR_MISALIGNED_ADDRESS.raw;
+        return;
+    }
+
+    if (cro_size & Memory::PAGE_MASK) {
+        LOG_ERROR(Service_LDR, "CRO size is not aligned");
+        cmd_buff[1] = ERROR_MISALIGNED_SIZE.raw;
+        return;
+    }
+
+    if (!VerifyBufferState(cro_buffer_ptr, cro_size)) {
+        LOG_ERROR(Service_LDR, "CRO original buffer is in invalid state");
+        cmd_buff[1] = ERROR_INVALID_MEMORY_STATE.raw;
+        return;
+    }
+
+    if (cro_address < Memory::PROCESS_IMAGE_VADDR
+        || cro_address + cro_size > Memory::PROCESS_IMAGE_VADDR_END) {
+        LOG_ERROR(Service_LDR, "CRO mapping address is not in the process image region");
+        cmd_buff[1] = ERROR_ILLEGAL_ADDRESS.raw;
+        return;
+    }
+
+    if (zero) {
+        LOG_ERROR(Service_LDR, "Zero is not zero %d", zero);
+        cmd_buff[1] = ResultCode(static_cast<ErrorDescription>(29), ErrorModule::RO, ErrorSummary::Internal, ErrorLevel::Usage).raw;
+        return;
+    }
+
+    ResultCode result = RESULT_SUCCESS;
+
+    if (cro_buffer_ptr != cro_address) {
+        // TODO(wwylele): should be memory aliasing
+        std::shared_ptr<std::vector<u8>> cro_mem = std::make_shared<std::vector<u8>>(cro_size);
+        Memory::ReadBlock(cro_buffer_ptr, cro_mem->data(), cro_size);
+        result = Kernel::g_current_process->vm_manager.MapMemoryBlock(cro_address, cro_mem, 0, cro_size, Kernel::MemoryState::Code).Code();
+        if (result.IsError()) {
+            LOG_ERROR(Service_LDR, "Error mapping memory block %08X", result.raw);
+            cmd_buff[1] = result.raw;
+            return;
+        }
+
+        result = Kernel::g_current_process->vm_manager.ReprotectRange(cro_address, cro_size, Kernel::VMAPermission::Read);
+        if (result.IsError()) {
+            LOG_ERROR(Service_LDR, "Error reprotecting memory block %08X", result.raw);
+            Kernel::g_current_process->vm_manager.UnmapRange(cro_address, cro_size);
+            cmd_buff[1] = result.raw;
+            return;
+        }
+
+        memory_synchronizer.AddMemoryBlock(cro_address, cro_buffer_ptr, cro_size);
+    } else {
+        // Do nothing if buffer_ptr == address
+        // TODO(wwylele): verify this behaviour.
+        //     This is derived from the case of LoadCRS with buffer_ptr==address,
+        //     and is never seen in any game. "Do nothing" is probably an incorrect implement.
+        //     There is also a chance that this case is just prohibited.
+        LOG_WARNING(Service_LDR, "cro_buffer_ptr == cro_address (0x%08X)", cro_address);
+    }
+
+    CROHelper cro(cro_address);
+
+    result = cro.VerifyHash(cro_size, crr_address);
+    if (result.IsError()) {
+        LOG_ERROR(Service_LDR, "Error verifying CRO in CRR %08X", result.raw);
+        Kernel::g_current_process->vm_manager.UnmapRange(cro_address, cro_size);
+        cmd_buff[1] = result.raw;
+        return;
+    }
+
+    result = cro.Rebase(loaded_crs, cro_size, data_segment_address, data_segment_size, bss_segment_address, bss_segment_size, false);
+    if (result.IsError()) {
+        LOG_ERROR(Service_LDR, "Error rebasing CRO %08X", result.raw);
+        Kernel::g_current_process->vm_manager.UnmapRange(cro_address, cro_size);
+        cmd_buff[1] = result.raw;
+        return;
+    }
+
+    result = cro.Link(loaded_crs, link_on_load_bug_fix);
+    if (result.IsError()) {
+        LOG_ERROR(Service_LDR, "Error linking CRO %08X", result.raw);
+        Kernel::g_current_process->vm_manager.UnmapRange(cro_address, cro_size);
+        cmd_buff[1] = result.raw;
+        return;
+    }
+
+    cro.Register(loaded_crs, auto_link);
+
+    u32 fix_size = cro.Fix(fix_level);
+
+    memory_synchronizer.SynchronizeOriginalMemory();
+
+    // TODO(wwylele): verify the behaviour when buffer_ptr == address
+    if (cro_buffer_ptr != cro_address) {
+        if (fix_size != cro_size) {
+            result = Kernel::g_current_process->vm_manager.UnmapRange(cro_address + fix_size, cro_size - fix_size);
+            if (result.IsError()) {
+                LOG_ERROR(Service_LDR, "Error unmapping memory block %08X", result.raw);
+                Kernel::g_current_process->vm_manager.UnmapRange(cro_address, cro_size);
+                cmd_buff[1] = result.raw;
+                return;
+            }
+        }
+
+        // Changes the block size
+        memory_synchronizer.AddMemoryBlock(cro_address, cro_buffer_ptr, fix_size);
+    }
+
+    VAddr exe_begin;
+    u32 exe_size;
+    std::tie(exe_begin, exe_size) = cro.GetExecutablePages();
+    if (exe_begin) {
+        result = Kernel::g_current_process->vm_manager.ReprotectRange(exe_begin, exe_size, Kernel::VMAPermission::ReadExecute);
+        if (result.IsError()) {
+            LOG_ERROR(Service_LDR, "Error reprotecting memory block %08X", result.raw);
+            Kernel::g_current_process->vm_manager.UnmapRange(cro_address, fix_size);
+            cmd_buff[1] = result.raw;
+            return;
+        }
+    }
+
+    Core::g_app_core->ClearInstructionCache();
+
+    LOG_INFO(Service_LDR, "CRO \"%s\" loaded at 0x%08X, fixed_end=0x%08X",
+        cro.ModuleName().data(), cro_address, cro_address+fix_size);
+
+    cmd_buff[1] = RESULT_SUCCESS.raw;
+    cmd_buff[2] = fix_size;
+}
+
+template <bool link_on_load_bug_fix>
+static void LoadCRO(Service::Interface* self) {
+    LoadCRO(self, link_on_load_bug_fix);
+}
+
+/**
+ * LDR_RO::UnloadCRO service function
+ *  Inputs:
+ *      1 : mapped CRO pointer
+ *      2 : zero? (RO service doesn't care)
+ *      3 : original CRO pointer
+ *      4 : handle translation descriptor (zero)
+ *      5 : KProcess handle
+ *  Outputs:
+ *      0 : Return header
+ *      1 : Result of function, 0 on success, otherwise error code
+ */
+static void UnloadCRO(Service::Interface* self) {
+    u32* cmd_buff = Kernel::GetCommandBuffer();
+    VAddr cro_address      = cmd_buff[1];
+    u32 zero               = cmd_buff[2];
+    VAddr cro_buffer_ptr   = cmd_buff[3];
+    u32 descriptor         = cmd_buff[4];
+    u32 process            = cmd_buff[5];
+
+    LOG_DEBUG(Service_LDR, "called, cro_address=0x%08X, zero=%d, cro_buffer_ptr=0x%08X, descriptor=0x%08X, process=0x%08X",
+        cro_address, zero, cro_buffer_ptr, descriptor, process);
+
+    if (descriptor != 0) {
+        LOG_ERROR(Service_LDR, "IPC handle descriptor failed validation (0x%X)", descriptor);
+        cmd_buff[0] = IPC::MakeHeader(0, 1, 0);
+        cmd_buff[1] = ERROR_INVALID_DESCRIPTOR.raw;
+        return;
+    }
+
+    CROHelper cro(cro_address);
+
+    memory_synchronizer.SynchronizeMappingMemory();
+
+    cmd_buff[0] = IPC::MakeHeader(5, 1, 0);
+
+    if (!loaded_crs) {
+        LOG_ERROR(Service_LDR, "Not initialized");
+        cmd_buff[1] = ERROR_NOT_INITIALIZED.raw;
+        return;
+    }
+
+    if (cro_address & Memory::PAGE_MASK) {
+        LOG_ERROR(Service_LDR, "CRO address is not aligned");
+        cmd_buff[1] = ERROR_MISALIGNED_ADDRESS.raw;
+        return;
+    }
+
+    if (!cro.IsLoaded()) {
+        LOG_ERROR(Service_LDR, "Invalid or not loaded CRO");
+        cmd_buff[1] = ERROR_NOT_LOADED.raw;
+        return;
+    }
+
+    LOG_INFO(Service_LDR, "Unloading CRO \"%s\"", cro.ModuleName().data());
+
+    u32 fixed_size = cro.GetFixedSize();
+
+    cro.Unregister(loaded_crs);
+
+    ResultCode result = cro.Unlink(loaded_crs);
+    if (result.IsError()) {
+        LOG_ERROR(Service_LDR, "Error unlinking CRO %08X", result.raw);
+        cmd_buff[1] = result.raw;
+        return;
+    }
+
+    // If the module is not fixed, clears all external/internal patches
+    // to restore the state before loading, so that it can be loaded again(?)
+    if (!cro.IsFixed()) {
+        result = cro.ClearPatches();
+        if (result.IsError()) {
+            LOG_ERROR(Service_LDR, "Error clearing patches %08X", result.raw);
+            cmd_buff[1] = result.raw;
+            return;
+        }
+    }
+
+    cro.Unrebase(false);
+
+    memory_synchronizer.SynchronizeOriginalMemory();
+
+    // TODO(wwylele): verify the behaviour when buffer_ptr == address
+    if (cro_address != cro_buffer_ptr) {
+        result = Kernel::g_current_process->vm_manager.UnmapRange(cro_address, fixed_size);
+        if (result.IsError()) {
+            LOG_ERROR(Service_LDR, "Error unmapping CRO %08X", result.raw);
+        }
+        memory_synchronizer.RemoveMemoryBlock(cro_address);
+    }
+
+    Core::g_app_core->ClearInstructionCache();
+
+    cmd_buff[1] = result.raw;
+}
+
+/**
+ * LDR_RO::LinkCRO service function
+ *  Inputs:
+ *      1 : mapped CRO pointer
+ *      2 : handle translation descriptor (zero)
+ *      3 : KProcess handle
+ *  Outputs:
+ *      0 : Return header
+ *      1 : Result of function, 0 on success, otherwise error code
+ */
+static void LinkCRO(Service::Interface* self) {
+    u32* cmd_buff = Kernel::GetCommandBuffer();
+    VAddr cro_address = cmd_buff[1];
+    u32 descriptor    = cmd_buff[2];
+    u32 process       = cmd_buff[3];
+
+    LOG_DEBUG(Service_LDR, "called, cro_address=0x%08X, descriptor=0x%08X, process=0x%08X",
+        cro_address, descriptor, process);
+
+    if (descriptor != 0) {
+        LOG_ERROR(Service_LDR, "IPC handle descriptor failed validation (0x%X)", descriptor);
+        cmd_buff[0] = IPC::MakeHeader(0, 1, 0);
+        cmd_buff[1] = ERROR_INVALID_DESCRIPTOR.raw;
+        return;
+    }
+
+    CROHelper cro(cro_address);
+
+    memory_synchronizer.SynchronizeMappingMemory();
+
+    cmd_buff[0] = IPC::MakeHeader(6, 1, 0);
+
+    if (!loaded_crs) {
+        LOG_ERROR(Service_LDR, "Not initialized");
+        cmd_buff[1] = ERROR_NOT_INITIALIZED.raw;
+        return;
+    }
+
+    if (cro_address & Memory::PAGE_MASK) {
+        LOG_ERROR(Service_LDR, "CRO address is not aligned");
+        cmd_buff[1] = ERROR_MISALIGNED_ADDRESS.raw;
+        return;
+    }
+
+    if (!cro.IsLoaded()) {
+        LOG_ERROR(Service_LDR, "Invalid or not loaded CRO");
+        cmd_buff[1] = ERROR_NOT_LOADED.raw;
+        return;
+    }
+
+    LOG_INFO(Service_LDR, "Linking CRO \"%s\"", cro.ModuleName().data());
+
+    ResultCode result = cro.Link(loaded_crs, false);
+    if (result.IsError()) {
+        LOG_ERROR(Service_LDR, "Error linking CRO %08X", result.raw);
+    }
+
+    memory_synchronizer.SynchronizeOriginalMemory();
+    Core::g_app_core->ClearInstructionCache();
+
+    cmd_buff[1] = result.raw;
+}
+
+/**
+ * LDR_RO::UnlinkCRO service function
+ *  Inputs:
+ *      1 : mapped CRO pointer
+ *      2 : handle translation descriptor (zero)
+ *      3 : KProcess handle
+ *  Outputs:
+ *      0 : Return header
+ *      1 : Result of function, 0 on success, otherwise error code
+ */
+static void UnlinkCRO(Service::Interface* self) {
+    u32* cmd_buff = Kernel::GetCommandBuffer();
+    VAddr cro_address = cmd_buff[1];
+    u32 descriptor    = cmd_buff[2];
+    u32 process       = cmd_buff[3];
+
+    LOG_DEBUG(Service_LDR, "called, cro_address=0x%08X, descriptor=0x%08X, process=0x%08X",
+        cro_address, descriptor, process);
+
+    if (descriptor != 0) {
+        LOG_ERROR(Service_LDR, "IPC handle descriptor failed validation (0x%X)", descriptor);
+        cmd_buff[0] = IPC::MakeHeader(0, 1, 0);
+        cmd_buff[1] = ERROR_INVALID_DESCRIPTOR.raw;
+        return;
+    }
+
+    CROHelper cro(cro_address);
+
+    memory_synchronizer.SynchronizeMappingMemory();
+
+    cmd_buff[0] = IPC::MakeHeader(7, 1, 0);
+
+    if (!loaded_crs) {
+        LOG_ERROR(Service_LDR, "Not initialized");
+        cmd_buff[1] = ERROR_NOT_INITIALIZED.raw;
+        return;
+    }
+
+    if (cro_address & Memory::PAGE_MASK) {
+        LOG_ERROR(Service_LDR, "CRO address is not aligned");
+        cmd_buff[1] = ERROR_MISALIGNED_ADDRESS.raw;
+        return;
+    }
+
+    if (!cro.IsLoaded()) {
+        LOG_ERROR(Service_LDR, "Invalid or not loaded CRO");
+        cmd_buff[1] = ERROR_NOT_LOADED.raw;
+        return;
+    }
+
+    LOG_INFO(Service_LDR, "Unlinking CRO \"%s\"", cro.ModuleName().data());
+
+    ResultCode result = cro.Unlink(loaded_crs);
+    if (result.IsError()) {
+        LOG_ERROR(Service_LDR, "Error unlinking CRO %08X", result.raw);
+    }
+
+    memory_synchronizer.SynchronizeOriginalMemory();
+    Core::g_app_core->ClearInstructionCache();
+
+    cmd_buff[1] = result.raw;
+}
+
+/**
+ * LDR_RO::Shutdown service function
+ *  Inputs:
+ *      1 : original CRS buffer pointer
+ *      2 : handle translation descriptor (zero)
+ *      3 : KProcess handle
+ *  Outputs:
+ *      0 : Return header
+ *      1 : Result of function, 0 on success, otherwise error code
+ */
+static void Shutdown(Service::Interface* self) {
+    u32* cmd_buff = Kernel::GetCommandBuffer();
+    VAddr crs_buffer_ptr = cmd_buff[1];
+    u32 descriptor       = cmd_buff[2];
+    u32 process          = cmd_buff[3];
+
+    LOG_DEBUG(Service_LDR, "called, crs_buffer_ptr=0x%08X, descriptor=0x%08X, process=0x%08X",
+        crs_buffer_ptr, descriptor, process);
+
+    if (descriptor != 0) {
+        LOG_ERROR(Service_LDR, "IPC handle descriptor failed validation (0x%X)", descriptor);
+        cmd_buff[0] = IPC::MakeHeader(0, 1, 0);
+        cmd_buff[1] = ERROR_INVALID_DESCRIPTOR.raw;
+        return;
+    }
+
+    memory_synchronizer.SynchronizeMappingMemory();
+
+    if (!loaded_crs) {
+        LOG_ERROR(Service_LDR, "Not initialized");
+        cmd_buff[1] = ERROR_NOT_INITIALIZED.raw;
+        return;
+    }
+
+    cmd_buff[0] = IPC::MakeHeader(8, 1, 0);
+
+    CROHelper crs(loaded_crs);
+    crs.Unrebase(true);
+
+    memory_synchronizer.SynchronizeOriginalMemory();
+
+    ResultCode result = RESULT_SUCCESS;
+
+    // TODO(wwylele): verify the behaviour when buffer_ptr == address
+    if (loaded_crs != crs_buffer_ptr) {
+        result = Kernel::g_current_process->vm_manager.UnmapRange(loaded_crs, crs.GetFileSize());
+        if (result.IsError()) {
+            LOG_ERROR(Service_LDR, "Error unmapping CRS %08X", result.raw);
+        }
+        memory_synchronizer.RemoveMemoryBlock(loaded_crs);
+    }
+
+    loaded_crs = 0;
+    cmd_buff[1] = result.raw;
 }
 
 const Interface::FunctionInfo FunctionTable[] = {
     {0x000100C2, Initialize,            "Initialize"},
     {0x00020082, LoadCRR,               "LoadCRR"},
-    {0x00030042, nullptr,               "UnloadCCR"},
+    {0x00030042, UnloadCRR,             "UnloadCRR"},
-    {0x000402C2, nullptr,               "LoadExeCRO"},
+    {0x000402C2, LoadCRO<false>,        "LoadCRO"},
-    {0x000500C2, nullptr,               "LoadCROSymbols"},
+    {0x000500C2, UnloadCRO,             "UnloadCRO"},
-    {0x00060042, nullptr,               "CRO_Load?"},
+    {0x00060042, LinkCRO,               "LinkCRO"},
-    {0x00070042, nullptr,               "LoadCROSymbols"},
+    {0x00070042, UnlinkCRO,             "UnlinkCRO"},
-    {0x00080042, nullptr,               "Shutdown"},
+    {0x00080042, Shutdown,              "Shutdown"},
-    {0x000902C2, nullptr,               "LoadExeCRO_New?"},
+    {0x000902C2, LoadCRO<true>,         "LoadCRO_New"},
 };
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
@@ -2162,6 +2788,9 @@ const Interface::FunctionInfo FunctionTable[] = {
 
 Interface::Interface() {
     Register(FunctionTable);
+
+    loaded_crs = 0;
+    memory_synchronizer.Clear();
 }
 
 } // namespace