Fix merge conflicts

8 files changed, 326 insertions, 39 deletions

diff --git a/src/core/loader/3dsx.cpp b/src/core/loader/3dsx.cpp
new file mode 100644
index 000000000..4d072871a
--- /dev/null
+++ b/src/core/loader/3dsx.cpp
@@ -0,0 +1,234 @@
+// Copyright 2014 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <algorithm>
+#include <vector>
+
+#include "core/file_sys/archive_romfs.h"
+#include "core/loader/elf.h"
+#include "core/loader/ncch.h"
+#include "core/hle/service/fs/archive.h"
+#include "core/mem_map.h"
+
+#include "3dsx.h"
+
+
+namespace Loader {
+
+
+/** 
+ * File layout:
+ * - File header
+ * - Code, rodata and data relocation table headers
+ * - Code segment
+ * - Rodata segment
+ * - Loadable (non-BSS) part of the data segment
+ * - Code relocation table
+ * - Rodata relocation table
+ * - Data relocation table
+ *
+ * Memory layout before relocations are applied:
+ * [0..codeSegSize)             -> code segment
+ * [codeSegSize..rodataSegSize) -> rodata segment
+ * [rodataSegSize..dataSegSize) -> data segment
+ *
+ * Memory layout after relocations are applied: well, however the loader sets it up :)
+ * The entrypoint is always the start of the code segment.
+ * The BSS section must be cleared manually by the application.
+ */
+enum THREEDSX_Error {
+    ERROR_NONE = 0,
+    ERROR_READ = 1,
+    ERROR_FILE = 2,
+    ERROR_ALLOC = 3
+};
+static const u32 RELOCBUFSIZE = 512;
+
+// File header
+static const u32 THREEDSX_MAGIC = 0x58534433; // '3DSX'
+#pragma pack(1)
+struct THREEDSX_Header
+{
+    u32 magic;
+    u16 header_size, reloc_hdr_size;
+    u32 format_ver;
+    u32 flags;
+
+    // Sizes of the code, rodata and data segments +
+    // size of the BSS section (uninitialized latter half of the data segment)
+    u32 code_seg_size, rodata_seg_size, data_seg_size, bss_size;
+};
+
+// Relocation header: all fields (even extra unknown fields) are guaranteed to be relocation counts.
+struct THREEDSX_RelocHdr
+{
+    // # of absolute relocations (that is, fix address to post-relocation memory layout)
+    u32 cross_segment_absolute; 
+    // # of cross-segment relative relocations (that is, 32bit signed offsets that need to be patched)
+    u32 cross_segment_relative; 
+    // more?
+
+    // Relocations are written in this order:
+    // - Absolute relocations
+    // - Relative relocations
+};
+
+// Relocation entry: from the current pointer, skip X words and patch Y words
+struct THREEDSX_Reloc
+{
+    u16 skip, patch;
+};
+#pragma pack()
+
+struct THREEloadinfo
+{
+    u8* seg_ptrs[3]; // code, rodata & data
+    u32 seg_addrs[3];
+    u32 seg_sizes[3];
+};
+
+class THREEDSXReader {
+public:
+     static int Load3DSXFile(const std::string& filename, u32 base_addr);
+};
+
+static u32 TranslateAddr(u32 addr, THREEloadinfo *loadinfo, u32* offsets)
+{
+    if (addr < offsets[0])
+        return loadinfo->seg_addrs[0] + addr;
+    if (addr < offsets[1])
+        return loadinfo->seg_addrs[1] + addr - offsets[0];
+    return loadinfo->seg_addrs[2] + addr - offsets[1];
+}
+
+int THREEDSXReader::Load3DSXFile(const std::string& filename, u32 base_addr)
+{
+    FileUtil::IOFile file(filename, "rb");
+    if (!file.IsOpen()) {
+        return ERROR_FILE;
+    }
+    THREEDSX_Header hdr;
+    if (file.ReadBytes(&hdr, sizeof(hdr)) != sizeof(hdr))
+        return ERROR_READ;
+
+    THREEloadinfo loadinfo;
+    //loadinfo segments must be a multiple of 0x1000
+    loadinfo.seg_sizes[0] = (hdr.code_seg_size + 0xFFF) &~0xFFF;
+    loadinfo.seg_sizes[1] = (hdr.rodata_seg_size + 0xFFF) &~0xFFF;
+    loadinfo.seg_sizes[2] = (hdr.data_seg_size + 0xFFF) &~0xFFF;
+    u32 offsets[2] = { loadinfo.seg_sizes[0], loadinfo.seg_sizes[0] + loadinfo.seg_sizes[1] };
+    u32 data_load_size = (hdr.data_seg_size - hdr.bss_size + 0xFFF) &~0xFFF;
+    u32 bss_load_size = loadinfo.seg_sizes[2] - data_load_size;
+    u32 n_reloc_tables = hdr.reloc_hdr_size / 4;
+    std::vector<u8> all_mem(loadinfo.seg_sizes[0] + loadinfo.seg_sizes[1] + loadinfo.seg_sizes[2] + 3 * n_reloc_tables);
+
+    loadinfo.seg_addrs[0] = base_addr;
+    loadinfo.seg_addrs[1] = loadinfo.seg_addrs[0] + loadinfo.seg_sizes[0];
+    loadinfo.seg_addrs[2] = loadinfo.seg_addrs[1] + loadinfo.seg_sizes[1];
+    loadinfo.seg_ptrs[0] = &all_mem[0];
+    loadinfo.seg_ptrs[1] = loadinfo.seg_ptrs[0] + loadinfo.seg_sizes[0];
+    loadinfo.seg_ptrs[2] = loadinfo.seg_ptrs[1] + loadinfo.seg_sizes[1];
+
+    // Skip header for future compatibility
+    file.Seek(hdr.header_size, SEEK_SET);
+
+    // Read the relocation headers
+    u32* relocs = (u32*)(loadinfo.seg_ptrs[2] + hdr.data_seg_size);
+
+    for (u32 current_segment = 0; current_segment < 3; current_segment++) {
+        if (file.ReadBytes(&relocs[current_segment*n_reloc_tables], n_reloc_tables * 4) != n_reloc_tables * 4)
+            return ERROR_READ;
+    }
+
+    // Read the segments
+    if (file.ReadBytes(loadinfo.seg_ptrs[0], hdr.code_seg_size) != hdr.code_seg_size)
+        return ERROR_READ;
+    if (file.ReadBytes(loadinfo.seg_ptrs[1], hdr.rodata_seg_size) != hdr.rodata_seg_size)
+        return ERROR_READ;
+    if (file.ReadBytes(loadinfo.seg_ptrs[2], hdr.data_seg_size - hdr.bss_size) != hdr.data_seg_size - hdr.bss_size)
+        return ERROR_READ;
+
+    // BSS clear
+    memset((char*)loadinfo.seg_ptrs[2] + hdr.data_seg_size - hdr.bss_size, 0, hdr.bss_size);
+
+    // Relocate the segments
+    for (u32 current_segment = 0; current_segment < 3; current_segment++) {
+        for (u32 current_segment_reloc_table = 0; current_segment_reloc_table < n_reloc_tables; current_segment_reloc_table++) {
+            u32 n_relocs = relocs[current_segment*n_reloc_tables + current_segment_reloc_table];
+            if (current_segment_reloc_table >= 2) {
+                // We are not using this table - ignore it because we don't know what it dose
+                file.Seek(n_relocs*sizeof(THREEDSX_Reloc), SEEK_CUR);
+                continue;
+            }
+            static THREEDSX_Reloc reloc_table[RELOCBUFSIZE];
+
+            u32* pos = (u32*)loadinfo.seg_ptrs[current_segment];
+            u32* end_pos = pos + (loadinfo.seg_sizes[current_segment] / 4);
+
+            while (n_relocs) {
+                u32 remaining = std::min(RELOCBUFSIZE, n_relocs);
+                n_relocs -= remaining;
+
+                if (file.ReadBytes(reloc_table, remaining*sizeof(THREEDSX_Reloc)) != remaining*sizeof(THREEDSX_Reloc))
+                    return ERROR_READ;
+
+                for (u32 current_inprogress = 0; current_inprogress < remaining && pos < end_pos; current_inprogress++) {
+                    LOG_TRACE(Loader, "(t=%d,skip=%u,patch=%u)\n",
+                        current_segment_reloc_table, (u32)reloc_table[current_inprogress].skip, (u32)reloc_table[current_inprogress].patch);
+                    pos += reloc_table[current_inprogress].skip;
+                    s32 num_patches = reloc_table[current_inprogress].patch;
+                    while (0 < num_patches && pos < end_pos) {
+                        u32 in_addr = (char*)pos - (char*)&all_mem[0];
+                        u32 addr = TranslateAddr(*pos, &loadinfo, offsets);
+                        LOG_TRACE(Loader, "Patching %08X <-- rel(%08X,%d) (%08X)\n",
+                            base_addr + in_addr, addr, current_segment_reloc_table, *pos);
+                        switch (current_segment_reloc_table) {
+                        case 0: *pos = (addr); break;
+                        case 1: *pos = (addr - in_addr); break;
+                        default: break; //this should never happen
+                        }
+                        pos++;
+                        num_patches--;
+                    }
+                }
+            }
+        }
+    }
+
+    // Write the data
+    memcpy(Memory::GetPointer(base_addr), &all_mem[0], loadinfo.seg_sizes[0] + loadinfo.seg_sizes[1] + loadinfo.seg_sizes[2]);
+
+    LOG_DEBUG(Loader, "CODE:   %u pages\n", loadinfo.seg_sizes[0] / 0x1000);
+    LOG_DEBUG(Loader, "RODATA: %u pages\n", loadinfo.seg_sizes[1] / 0x1000);
+    LOG_DEBUG(Loader, "DATA:   %u pages\n", data_load_size / 0x1000);
+    LOG_DEBUG(Loader, "BSS:    %u pages\n", bss_load_size / 0x1000);
+
+    return ERROR_NONE;
+}
+
+    /// AppLoader_DSX constructor
+    AppLoader_THREEDSX::AppLoader_THREEDSX(const std::string& filename) : filename(filename) {
+    }
+
+    /// AppLoader_DSX destructor
+    AppLoader_THREEDSX::~AppLoader_THREEDSX() {
+    }
+
+    /**
+    * Loads a 3DSX file
+    * @return Success on success, otherwise Error
+    */
+    ResultStatus AppLoader_THREEDSX::Load() {
+        LOG_INFO(Loader, "Loading 3DSX file %s...", filename.c_str());
+        FileUtil::IOFile file(filename, "rb");
+        if (file.IsOpen()) {
+            THREEDSXReader::Load3DSXFile(filename, 0x00100000);
+            Kernel::LoadExec(0x00100000);
+        } else {
+            return ResultStatus::Error;
+        }
+        return ResultStatus::Success;
+    }
+
+} // namespace Loader
diff --git a/src/core/loader/3dsx.h b/src/core/loader/3dsx.h
new file mode 100644
index 000000000..da8836662
--- /dev/null
+++ b/src/core/loader/3dsx.h
@@ -0,0 +1,32 @@
+// Copyright 2014 Dolphin Emulator Project / Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_types.h"
+#include "core/loader/loader.h"
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+// Loader namespace
+
+namespace Loader {
+
+/// Loads an 3DSX file
+class AppLoader_THREEDSX final : public AppLoader {
+public:
+    AppLoader_THREEDSX(const std::string& filename);
+    ~AppLoader_THREEDSX() override;
+
+    /**
+     * Load the bootable file
+     * @return ResultStatus result of function
+     */
+    ResultStatus Load() override;
+
+private:
+    std::string filename;
+    bool        is_loaded;
+};
+
+} // namespace Loader
diff --git a/src/core/loader/elf.cpp b/src/core/loader/elf.cpp
index 63d2496ed..354335014 100644
--- a/src/core/loader/elf.cpp
+++ b/src/core/loader/elf.cpp
@@ -1,5 +1,5 @@
-// Copyright 2013 Dolphin Emulator Project
-// Licensed under GPLv2
+// Copyright 2013 Dolphin Emulator Project / 2014 Citra Emulator Project
+// Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
 #include <string>
@@ -254,18 +254,18 @@ const char *ElfReader::GetSectionName(int section) const {
 }
 
 bool ElfReader::LoadInto(u32 vaddr) {
-    DEBUG_LOG(MASTER_LOG, "String section: %i", header->e_shstrndx);
+    LOG_DEBUG(Loader, "String section: %i", header->e_shstrndx);
 
     // Should we relocate?
     relocate = (header->e_type != ET_EXEC);
 
     if (relocate) {
-        DEBUG_LOG(MASTER_LOG, "Relocatable module");
+        LOG_DEBUG(Loader, "Relocatable module");
         entryPoint += vaddr;
     } else {
-        DEBUG_LOG(MASTER_LOG, "Prerelocated executable");
+        LOG_DEBUG(Loader, "Prerelocated executable");
     }
-    INFO_LOG(MASTER_LOG, "%i segments:", header->e_phnum);
+    LOG_DEBUG(Loader, "%i segments:", header->e_phnum);
 
     // First pass : Get the bits into RAM
     u32 segment_addr[32];
@@ -273,17 +273,17 @@ bool ElfReader::LoadInto(u32 vaddr) {
 
     for (int i = 0; i < header->e_phnum; i++) {
         Elf32_Phdr *p = segments + i;
-        INFO_LOG(MASTER_LOG, "Type: %i Vaddr: %08x Filesz: %i Memsz: %i ", p->p_type, p->p_vaddr,
+        LOG_DEBUG(Loader, "Type: %i Vaddr: %08x Filesz: %i Memsz: %i ", p->p_type, p->p_vaddr,
             p->p_filesz, p->p_memsz);
 
         if (p->p_type == PT_LOAD) {
             segment_addr[i] = base_addr + p->p_vaddr;
             memcpy(Memory::GetPointer(segment_addr[i]), GetSegmentPtr(i), p->p_filesz);
-            INFO_LOG(MASTER_LOG, "Loadable Segment Copied to %08x, size %08x", segment_addr[i],
+            LOG_DEBUG(Loader, "Loadable Segment Copied to %08x, size %08x", segment_addr[i],
                 p->p_memsz);
         }
     }
-    INFO_LOG(MASTER_LOG, "Done loading.");
+    LOG_DEBUG(Loader, "Done loading.");
     return true;
 }
 
@@ -346,7 +346,7 @@ AppLoader_ELF::~AppLoader_ELF() {
  * @return True on success, otherwise false
  */
 ResultStatus AppLoader_ELF::Load() {
-    INFO_LOG(LOADER, "Loading ELF file %s...", filename.c_str());
+    LOG_INFO(Loader, "Loading ELF file %s...", filename.c_str());
 
     if (is_loaded)
         return ResultStatus::ErrorAlreadyLoaded;
diff --git a/src/core/loader/elf.h b/src/core/loader/elf.h
index 5ae88439a..c221cce6d 100644
--- a/src/core/loader/elf.h
+++ b/src/core/loader/elf.h
@@ -1,5 +1,5 @@
-// Copyright 2013 Dolphin Emulator Project / Citra Emulator Project
-// Licensed under GPLv2
+// Copyright 2013 Dolphin Emulator Project / 2014 Citra Emulator Project
+// Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
 #pragma once
diff --git a/src/core/loader/loader.cpp b/src/core/loader/loader.cpp
index a268e021a..87580cb2a 100644
--- a/src/core/loader/loader.cpp
+++ b/src/core/loader/loader.cpp
@@ -1,13 +1,16 @@
 // Copyright 2014 Citra Emulator Project
-// Licensed under GPLv2
+// Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
-#include <memory>
+#include <string>
+
+#include "common/make_unique.h"
 
 #include "core/file_sys/archive_romfs.h"
+#include "core/loader/3dsx.h"
 #include "core/loader/elf.h"
 #include "core/loader/ncch.h"
-#include "core/hle/kernel/archive.h"
+#include "core/hle/service/fs/archive.h"
 #include "core/mem_map.h"
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
@@ -22,7 +25,7 @@ namespace Loader {
  */
 FileType IdentifyFile(const std::string &filename) {
     if (filename.size() == 0) {
-        ERROR_LOG(LOADER, "invalid filename %s", filename.c_str());
+        LOG_ERROR(Loader, "invalid filename %s", filename.c_str());
         return FileType::Error;
     }
 
@@ -42,6 +45,8 @@ FileType IdentifyFile(const std::string &filename) {
         return FileType::CCI;
     } else if (extension == ".bin") {
         return FileType::BIN;
+    } else if (extension == ".3dsx") {
+        return FileType::THREEDSX;
     }
     return FileType::Unknown;
 }
@@ -52,10 +57,14 @@ FileType IdentifyFile(const std::string &filename) {
  * @return ResultStatus result of function
  */
 ResultStatus LoadFile(const std::string& filename) {
-    INFO_LOG(LOADER, "Loading file %s...", filename.c_str());
+    LOG_INFO(Loader, "Loading file %s...", filename.c_str());
 
     switch (IdentifyFile(filename)) {
 
+    //3DSX file format...
+    case FileType::THREEDSX:
+        return AppLoader_THREEDSX(filename).Load();
+
     // Standard ELF file format...
     case FileType::ELF:
         return AppLoader_ELF(filename).Load();
@@ -67,7 +76,8 @@ ResultStatus LoadFile(const std::string& filename) {
 
         // Load application and RomFS
         if (ResultStatus::Success == app_loader.Load()) {
-            Kernel::CreateArchive(new FileSys::Archive_RomFS(app_loader), "RomFS");
+            Kernel::g_program_id = app_loader.GetProgramId();
+            Service::FS::CreateArchive(Common::make_unique<FileSys::Archive_RomFS>(app_loader), Service::FS::ArchiveIdCode::RomFS);
             return ResultStatus::Success;
         }
         break;
@@ -76,7 +86,7 @@ ResultStatus LoadFile(const std::string& filename) {
     // Raw BIN file format...
     case FileType::BIN:
     {
-        INFO_LOG(LOADER, "Loading BIN file %s...", filename.c_str());
+        LOG_INFO(Loader, "Loading BIN file %s...", filename.c_str());
 
         FileUtil::IOFile file(filename, "rb");
 
diff --git a/src/core/loader/loader.h b/src/core/loader/loader.h
index 68f843005..ec5534d41 100644
--- a/src/core/loader/loader.h
+++ b/src/core/loader/loader.h
@@ -1,5 +1,5 @@
 // Copyright 2014 Citra Emulator Project
-// Licensed under GPLv2
+// Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
 #pragma once
@@ -22,6 +22,7 @@ enum class FileType {
     CIA,
     ELF,
     BIN,
+    THREEDSX, //3DSX
 };
 
 /// Return type for functions in Loader namespace
diff --git a/src/core/loader/ncch.cpp b/src/core/loader/ncch.cpp
index 343bb7523..0dc21699e 100644
--- a/src/core/loader/ncch.cpp
+++ b/src/core/loader/ncch.cpp
@@ -1,5 +1,5 @@
 // Copyright 2014 Citra Emulator Project
-// Licensed under GPLv2
+// Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
 #include <memory>
@@ -140,13 +140,13 @@ ResultStatus AppLoader_NCCH::LoadSectionExeFS(const char* name, std::vector<u8>&
     // Iterate through the ExeFs archive until we find the .code file...
     FileUtil::IOFile file(filename, "rb");
     if (file.IsOpen()) {
+        LOG_DEBUG(Loader, "%d sections:", kMaxSections);
         for (int i = 0; i < kMaxSections; i++) {
             // Load the specified section...
             if (strcmp((const char*)exefs_header.section[i].name, name) == 0) {
-                INFO_LOG(LOADER, "ExeFS section %d:", i);
-                INFO_LOG(LOADER, "    name:   %s", exefs_header.section[i].name);
-                INFO_LOG(LOADER, "    offset: 0x%08X", exefs_header.section[i].offset);
-                INFO_LOG(LOADER, "    size:   0x%08X", exefs_header.section[i].size);
+                LOG_DEBUG(Loader, "%d - offset: 0x%08X, size: 0x%08X, name: %s", i,
+                        exefs_header.section[i].offset, exefs_header.section[i].size,
+                        exefs_header.section[i].name);
 
                 s64 section_offset = (exefs_header.section[i].offset + exefs_offset +
                     sizeof(ExeFs_Header)+ncch_offset);
@@ -181,7 +181,7 @@ ResultStatus AppLoader_NCCH::LoadSectionExeFS(const char* name, std::vector<u8>&
             }
         }
     } else {
-        ERROR_LOG(LOADER, "Unable to read file %s!", filename.c_str());
+        LOG_ERROR(Loader, "Unable to read file %s!", filename.c_str());
         return ResultStatus::Error;
     }
     return ResultStatus::ErrorNotUsed;
@@ -194,7 +194,7 @@ ResultStatus AppLoader_NCCH::LoadSectionExeFS(const char* name, std::vector<u8>&
  * @return True on success, otherwise false
  */
 ResultStatus AppLoader_NCCH::Load() {
-    INFO_LOG(LOADER, "Loading NCCH file %s...", filename.c_str());
+    LOG_INFO(Loader, "Loading NCCH file %s...", filename.c_str());
 
     if (is_loaded)
         return ResultStatus::ErrorAlreadyLoaded;
@@ -205,7 +205,7 @@ ResultStatus AppLoader_NCCH::Load() {
 
         // Skip NCSD header and load first NCCH (NCSD is just a container of NCCH files)...
         if (0 == memcmp(&ncch_header.magic, "NCSD", 4)) {
-            WARN_LOG(LOADER, "Only loading the first (bootable) NCCH within the NCSD file!");
+            LOG_WARNING(Loader, "Only loading the first (bootable) NCCH within the NCSD file!");
             ncch_offset = 0x4000;
             file.Seek(ncch_offset, 0);
             file.ReadBytes(&ncch_header, sizeof(NCCH_Header));
@@ -222,17 +222,17 @@ ResultStatus AppLoader_NCCH::Load() {
         is_compressed = (exheader_header.codeset_info.flags.flag & 1) == 1;
         entry_point = exheader_header.codeset_info.text.address;
 
-        INFO_LOG(LOADER, "Name:            %s", exheader_header.codeset_info.name);
-        INFO_LOG(LOADER, "Code compressed: %s", is_compressed ? "yes" : "no");
-        INFO_LOG(LOADER, "Entry point:     0x%08X", entry_point);
+        LOG_INFO(Loader, "Name:            %s", exheader_header.codeset_info.name);
+        LOG_DEBUG(Loader, "Code compressed: %s", is_compressed ? "yes" : "no");
+        LOG_DEBUG(Loader, "Entry point:     0x%08X", entry_point);
 
         // Read ExeFS...
 
         exefs_offset = ncch_header.exefs_offset * kBlockSize;
         u32 exefs_size = ncch_header.exefs_size * kBlockSize;
 
-        INFO_LOG(LOADER, "ExeFS offset:    0x%08X", exefs_offset);
-        INFO_LOG(LOADER, "ExeFS size:      0x%08X", exefs_size);
+        LOG_DEBUG(Loader, "ExeFS offset:    0x%08X", exefs_offset);
+        LOG_DEBUG(Loader, "ExeFS size:      0x%08X", exefs_size);
 
         file.Seek(exefs_offset + ncch_offset, 0);
         file.ReadBytes(&exefs_header, sizeof(ExeFs_Header));
@@ -243,7 +243,7 @@ ResultStatus AppLoader_NCCH::Load() {
 
         return ResultStatus::Success;
     } else {
-        ERROR_LOG(LOADER, "Unable to read file %s!", filename.c_str());
+        LOG_ERROR(Loader, "Unable to read file %s!", filename.c_str());
     }
     return ResultStatus::Error;
 }
@@ -297,8 +297,8 @@ ResultStatus AppLoader_NCCH::ReadRomFS(std::vector<u8>& buffer) const {
             u32 romfs_offset = ncch_offset + (ncch_header.romfs_offset * kBlockSize) + 0x1000;
             u32 romfs_size = (ncch_header.romfs_size * kBlockSize) - 0x1000;
 
-            INFO_LOG(LOADER, "RomFS offset:    0x%08X", romfs_offset);
-            INFO_LOG(LOADER, "RomFS size:      0x%08X", romfs_size);
+            LOG_DEBUG(Loader, "RomFS offset:    0x%08X", romfs_offset);
+            LOG_DEBUG(Loader, "RomFS size:      0x%08X", romfs_size);
 
             buffer.resize(romfs_size);
 
@@ -307,12 +307,16 @@ ResultStatus AppLoader_NCCH::ReadRomFS(std::vector<u8>& buffer) const {
 
             return ResultStatus::Success;
         }
-        NOTICE_LOG(LOADER, "RomFS unused");
+        LOG_DEBUG(Loader, "NCCH has no RomFS");
         return ResultStatus::ErrorNotUsed;
     } else {
-        ERROR_LOG(LOADER, "Unable to read file %s!", filename.c_str());
+        LOG_ERROR(Loader, "Unable to read file %s!", filename.c_str());
     }
     return ResultStatus::Error;
 }
 
+u64 AppLoader_NCCH::GetProgramId() const {
+    return *reinterpret_cast<u64 const*>(&ncch_header.program_id[0]);
+}
+
 } // namespace Loader
diff --git a/src/core/loader/ncch.h b/src/core/loader/ncch.h
index 03116add8..fd9258970 100644
--- a/src/core/loader/ncch.h
+++ b/src/core/loader/ncch.h
@@ -1,5 +1,5 @@
 // Copyright 2014 Citra Emulator Project
-// Licensed under GPLv2
+// Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
 #pragma once
@@ -191,6 +191,12 @@ public:
      */
     ResultStatus ReadRomFS(std::vector<u8>& buffer) const override;
 
+    /*
+     * Gets the program id from the NCCH header
+     * @return u64 Program id
+     */
+    u64 GetProgramId() const;
+
 private:
 
     /**