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-rw-r--r--src/core/loader/ncch.cpp291
1 files changed, 119 insertions, 172 deletions
diff --git a/src/core/loader/ncch.cpp b/src/core/loader/ncch.cpp
index 0dc21699e..aaaa4d650 100644
--- a/src/core/loader/ncch.cpp
+++ b/src/core/loader/ncch.cpp
@@ -4,8 +4,6 @@
#include <memory>
-#include "common/file_util.h"
-
#include "core/loader/ncch.h"
#include "core/hle/kernel/kernel.h"
#include "core/mem_map.h"
@@ -15,8 +13,8 @@
namespace Loader {
-static const int kMaxSections = 8; ///< Maximum number of sections (files) in an ExeFs
-static const int kBlockSize = 0x200; ///< Size of ExeFS blocks (in bytes)
+static const int kMaxSections = 8; ///< Maximum number of sections (files) in an ExeFs
+static const int kBlockSize = 0x200; ///< Size of ExeFS blocks (in bytes)
/**
* Get the decompressed size of an LZSS compressed ExeFS file
@@ -24,7 +22,7 @@ static const int kBlockSize = 0x200; ///< Size of ExeFS blocks (in bytes)
* @param size Size of compressed buffer
* @return Size of decompressed buffer
*/
-static u32 LZSS_GetDecompressedSize(u8* buffer, u32 size) {
+static u32 LZSS_GetDecompressedSize(const u8* buffer, u32 size) {
u32 offset_size = *(u32*)(buffer + size - 4);
return offset_size + size;
}
@@ -37,9 +35,9 @@ static u32 LZSS_GetDecompressedSize(u8* buffer, u32 size) {
* @param decompressed_size Size of decompressed buffer
* @return True on success, otherwise false
*/
-static bool LZSS_Decompress(u8* compressed, u32 compressed_size, u8* decompressed, u32 decompressed_size) {
- u8* footer = compressed + compressed_size - 8;
- u32 buffer_top_and_bottom = *(u32*)footer;
+static bool LZSS_Decompress(const u8* compressed, u32 compressed_size, u8* decompressed, u32 decompressed_size) {
+ const u8* footer = compressed + compressed_size - 8;
+ u32 buffer_top_and_bottom = *reinterpret_cast<const u32*>(footer);
u32 out = decompressed_size;
u32 index = compressed_size - ((buffer_top_and_bottom >> 24) & 0xFF);
u32 stop_index = compressed_size - (buffer_top_and_bottom & 0xFFFFFF);
@@ -47,22 +45,21 @@ static bool LZSS_Decompress(u8* compressed, u32 compressed_size, u8* decompresse
memset(decompressed, 0, decompressed_size);
memcpy(decompressed, compressed, compressed_size);
- while(index > stop_index) {
+ while (index > stop_index) {
u8 control = compressed[--index];
- for(u32 i = 0; i < 8; i++) {
- if(index <= stop_index)
+ for (unsigned i = 0; i < 8; i++) {
+ if (index <= stop_index)
break;
- if(index <= 0)
+ if (index <= 0)
break;
- if(out <= 0)
+ if (out <= 0)
break;
- if(control & 0x80) {
+ if (control & 0x80) {
// Check if compression is out of bounds
- if(index < 2) {
+ if (index < 2)
return false;
- }
index -= 2;
u32 segment_offset = compressed[index] | (compressed[index + 1] << 8);
@@ -71,23 +68,21 @@ static bool LZSS_Decompress(u8* compressed, u32 compressed_size, u8* decompresse
segment_offset += 2;
// Check if compression is out of bounds
- if(out < segment_size) {
+ if (out < segment_size)
return false;
- }
- for(u32 j = 0; j < segment_size; j++) {
+
+ for (unsigned j = 0; j < segment_size; j++) {
// Check if compression is out of bounds
- if(out + segment_offset >= decompressed_size) {
+ if (out + segment_offset >= decompressed_size)
return false;
- }
- u8 data = decompressed[out + segment_offset];
+ u8 data = decompressed[out + segment_offset];
decompressed[--out] = data;
}
} else {
// Check if compression is out of bounds
- if(out < 1) {
+ if (out < 1)
return false;
- }
decompressed[--out] = compressed[--index];
}
control <<= 1;
@@ -99,24 +94,21 @@ static bool LZSS_Decompress(u8* compressed, u32 compressed_size, u8* decompresse
////////////////////////////////////////////////////////////////////////////////////////////////////
// AppLoader_NCCH class
-/// AppLoader_NCCH constructor
-AppLoader_NCCH::AppLoader_NCCH(const std::string& filename) {
- this->filename = filename;
- is_loaded = false;
- is_compressed = false;
- entry_point = 0;
- ncch_offset = 0;
- exefs_offset = 0;
-}
+FileType AppLoader_NCCH::IdentifyType(FileUtil::IOFile& file) {
+ u32 magic;
+ file.Seek(0x100, SEEK_SET);
+ if (1 != file.ReadArray<u32>(&magic, 1))
+ return FileType::Error;
+
+ if (MakeMagic('N', 'C', 'S', 'D') == magic)
+ return FileType::CCI;
-/// AppLoader_NCCH destructor
-AppLoader_NCCH::~AppLoader_NCCH() {
+ if (MakeMagic('N', 'C', 'C', 'H') == magic)
+ return FileType::CXI;
+
+ return FileType::Error;
}
-/**
- * Loads .code section into memory for booting
- * @return ResultStatus result of function
- */
ResultStatus AppLoader_NCCH::LoadExec() const {
if (!is_loaded)
return ResultStatus::ErrorNotLoaded;
@@ -130,189 +122,144 @@ ResultStatus AppLoader_NCCH::LoadExec() const {
return ResultStatus::Error;
}
-/**
- * Reads an application ExeFS section of an NCCH file into AppLoader (e.g. .code, .logo, etc.)
- * @param name Name of section to read out of NCCH file
- * @param buffer Vector to read data into
- * @return ResultStatus result of function
- */
ResultStatus AppLoader_NCCH::LoadSectionExeFS(const char* name, std::vector<u8>& buffer) const {
+ if (!file->IsOpen())
+ return ResultStatus::Error;
+
+ LOG_DEBUG(Loader, "%d sections:", kMaxSections);
// 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) {
- 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);
- file.Seek(section_offset, 0);
-
- // Section is compressed...
- if (i == 0 && is_compressed) {
- // Read compressed .code section...
- std::unique_ptr<u8[]> temp_buffer;
- try {
- temp_buffer.reset(new u8[exefs_header.section[i].size]);
- } catch (std::bad_alloc&) {
- return ResultStatus::ErrorMemoryAllocationFailed;
- }
- file.ReadBytes(&temp_buffer[0], exefs_header.section[i].size);
-
- // Decompress .code section...
- u32 decompressed_size = LZSS_GetDecompressedSize(&temp_buffer[0],
- exefs_header.section[i].size);
- buffer.resize(decompressed_size);
- if (!LZSS_Decompress(&temp_buffer[0], exefs_header.section[i].size, &buffer[0],
- decompressed_size)) {
- return ResultStatus::ErrorInvalidFormat;
- }
- // Section is uncompressed...
- }
- else {
- buffer.resize(exefs_header.section[i].size);
- file.ReadBytes(&buffer[0], exefs_header.section[i].size);
+ for (unsigned section_number = 0; section_number < kMaxSections; section_number++) {
+ const auto& section = exefs_header.section[section_number];
+
+ // Load the specified section...
+ if (strcmp(section.name, name) == 0) {
+ LOG_DEBUG(Loader, "%d - offset: 0x%08X, size: 0x%08X, name: %s", section_number,
+ section.offset, section.size, section.name);
+
+ s64 section_offset = (section.offset + exefs_offset + sizeof(ExeFs_Header) + ncch_offset);
+ file->Seek(section_offset, SEEK_SET);
+
+ if (is_compressed) {
+ // Section is compressed, read compressed .code section...
+ std::unique_ptr<u8[]> temp_buffer;
+ try {
+ temp_buffer.reset(new u8[section.size]);
+ } catch (std::bad_alloc&) {
+ return ResultStatus::ErrorMemoryAllocationFailed;
}
- return ResultStatus::Success;
+
+ if (file->ReadBytes(&temp_buffer[0], section.size) != section.size)
+ return ResultStatus::Error;
+
+ // Decompress .code section...
+ u32 decompressed_size = LZSS_GetDecompressedSize(&temp_buffer[0], section.size);
+ buffer.resize(decompressed_size);
+ if (!LZSS_Decompress(&temp_buffer[0], section.size, &buffer[0], decompressed_size))
+ return ResultStatus::ErrorInvalidFormat;
+ } else {
+ // Section is uncompressed...
+ buffer.resize(section.size);
+ if (file->ReadBytes(&buffer[0], section.size) != section.size)
+ return ResultStatus::Error;
}
+ return ResultStatus::Success;
}
- } else {
- LOG_ERROR(Loader, "Unable to read file %s!", filename.c_str());
- return ResultStatus::Error;
}
return ResultStatus::ErrorNotUsed;
}
-/**
- * Loads an NCCH file (e.g. from a CCI, or the first NCCH in a CXI)
- * @param error_string Pointer to string to put error message if an error has occurred
- * @todo Move NCSD parsing out of here and create a separate function for loading these
- * @return True on success, otherwise false
- */
ResultStatus AppLoader_NCCH::Load() {
- LOG_INFO(Loader, "Loading NCCH file %s...", filename.c_str());
-
if (is_loaded)
return ResultStatus::ErrorAlreadyLoaded;
- FileUtil::IOFile file(filename, "rb");
- if (file.IsOpen()) {
- file.ReadBytes(&ncch_header, sizeof(NCCH_Header));
+ if (!file->IsOpen())
+ return ResultStatus::Error;
- // Skip NCSD header and load first NCCH (NCSD is just a container of NCCH files)...
- if (0 == memcmp(&ncch_header.magic, "NCSD", 4)) {
- 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));
- }
+ // Reset read pointer in case this file has been read before.
+ file->Seek(0, SEEK_SET);
- // Verify we are loading the correct file type...
- if (0 != memcmp(&ncch_header.magic, "NCCH", 4))
- return ResultStatus::ErrorInvalidFormat;
+ if (file->ReadBytes(&ncch_header, sizeof(NCCH_Header)) != sizeof(NCCH_Header))
+ return ResultStatus::Error;
- // Read ExHeader...
+ // Skip NCSD header and load first NCCH (NCSD is just a container of NCCH files)...
+ if (MakeMagic('N', 'C', 'S', 'D') == ncch_header.magic) {
+ LOG_WARNING(Loader, "Only loading the first (bootable) NCCH within the NCSD file!");
+ ncch_offset = 0x4000;
+ file->Seek(ncch_offset, SEEK_SET);
+ file->ReadBytes(&ncch_header, sizeof(NCCH_Header));
+ }
- file.ReadBytes(&exheader_header, sizeof(ExHeader_Header));
+ // Verify we are loading the correct file type...
+ if (MakeMagic('N', 'C', 'C', 'H') != ncch_header.magic)
+ return ResultStatus::ErrorInvalidFormat;
- is_compressed = (exheader_header.codeset_info.flags.flag & 1) == 1;
- entry_point = exheader_header.codeset_info.text.address;
+ // Read ExHeader...
- 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);
+ if (file->ReadBytes(&exheader_header, sizeof(ExHeader_Header)) != sizeof(ExHeader_Header))
+ return ResultStatus::Error;
- // Read ExeFS...
+ is_compressed = (exheader_header.codeset_info.flags.flag & 1) == 1;
+ entry_point = exheader_header.codeset_info.text.address;
- exefs_offset = ncch_header.exefs_offset * kBlockSize;
- u32 exefs_size = ncch_header.exefs_size * kBlockSize;
+ 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);
- LOG_DEBUG(Loader, "ExeFS offset: 0x%08X", exefs_offset);
- LOG_DEBUG(Loader, "ExeFS size: 0x%08X", exefs_size);
+ // Read ExeFS...
- file.Seek(exefs_offset + ncch_offset, 0);
- file.ReadBytes(&exefs_header, sizeof(ExeFs_Header));
+ exefs_offset = ncch_header.exefs_offset * kBlockSize;
+ u32 exefs_size = ncch_header.exefs_size * kBlockSize;
- is_loaded = true; // Set state to loaded
+ LOG_DEBUG(Loader, "ExeFS offset: 0x%08X", exefs_offset);
+ LOG_DEBUG(Loader, "ExeFS size: 0x%08X", exefs_size);
- LoadExec(); // Load the executable into memory for booting
+ file->Seek(exefs_offset + ncch_offset, SEEK_SET);
+ if (file->ReadBytes(&exefs_header, sizeof(ExeFs_Header)) != sizeof(ExeFs_Header))
+ return ResultStatus::Error;
- return ResultStatus::Success;
- } else {
- LOG_ERROR(Loader, "Unable to read file %s!", filename.c_str());
- }
- return ResultStatus::Error;
+ is_loaded = true; // Set state to loaded
+
+ return LoadExec(); // Load the executable into memory for booting
}
-/**
- * Get the code (typically .code section) of the application
- * @param buffer Reference to buffer to store data
- * @return ResultStatus result of function
- */
ResultStatus AppLoader_NCCH::ReadCode(std::vector<u8>& buffer) const {
return LoadSectionExeFS(".code", buffer);
}
-/**
- * Get the icon (typically icon section) of the application
- * @param buffer Reference to buffer to store data
- * @return ResultStatus result of function
- */
ResultStatus AppLoader_NCCH::ReadIcon(std::vector<u8>& buffer) const {
return LoadSectionExeFS("icon", buffer);
}
-/**
- * Get the banner (typically banner section) of the application
- * @param buffer Reference to buffer to store data
- * @return ResultStatus result of function
- */
ResultStatus AppLoader_NCCH::ReadBanner(std::vector<u8>& buffer) const {
return LoadSectionExeFS("banner", buffer);
}
-/**
- * Get the logo (typically logo section) of the application
- * @param buffer Reference to buffer to store data
- * @return ResultStatus result of function
- */
ResultStatus AppLoader_NCCH::ReadLogo(std::vector<u8>& buffer) const {
return LoadSectionExeFS("logo", buffer);
}
-/**
- * Get the RomFS of the application
- * @param buffer Reference to buffer to store data
- * @return ResultStatus result of function
- */
ResultStatus AppLoader_NCCH::ReadRomFS(std::vector<u8>& buffer) const {
- FileUtil::IOFile file(filename, "rb");
- if (file.IsOpen()) {
- // Check if the NCCH has a RomFS...
- if (ncch_header.romfs_offset != 0 && ncch_header.romfs_size != 0) {
- u32 romfs_offset = ncch_offset + (ncch_header.romfs_offset * kBlockSize) + 0x1000;
- u32 romfs_size = (ncch_header.romfs_size * kBlockSize) - 0x1000;
+ if (!file->IsOpen())
+ return ResultStatus::Error;
- LOG_DEBUG(Loader, "RomFS offset: 0x%08X", romfs_offset);
- LOG_DEBUG(Loader, "RomFS size: 0x%08X", romfs_size);
+ // Check if the NCCH has a RomFS...
+ if (ncch_header.romfs_offset != 0 && ncch_header.romfs_size != 0) {
+ u32 romfs_offset = ncch_offset + (ncch_header.romfs_offset * kBlockSize) + 0x1000;
+ u32 romfs_size = (ncch_header.romfs_size * kBlockSize) - 0x1000;
- buffer.resize(romfs_size);
+ LOG_DEBUG(Loader, "RomFS offset: 0x%08X", romfs_offset);
+ LOG_DEBUG(Loader, "RomFS size: 0x%08X", romfs_size);
- file.Seek(romfs_offset, 0);
- file.ReadBytes(&buffer[0], romfs_size);
+ buffer.resize(romfs_size);
- return ResultStatus::Success;
- }
- LOG_DEBUG(Loader, "NCCH has no RomFS");
- return ResultStatus::ErrorNotUsed;
- } else {
- LOG_ERROR(Loader, "Unable to read file %s!", filename.c_str());
+ file->Seek(romfs_offset, SEEK_SET);
+ if (file->ReadBytes(&buffer[0], romfs_size) != romfs_size)
+ return ResultStatus::Error;
+
+ return ResultStatus::Success;
}
- return ResultStatus::Error;
+ LOG_DEBUG(Loader, "NCCH has no RomFS");
+ return ResultStatus::ErrorNotUsed;
}
u64 AppLoader_NCCH::GetProgramId() const {
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