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Loader: Refactored loading functions to only read data from binary if called.

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NCCH: Updated LoadExec to use Memory::WriteBlock function to load binary code.
This commit is contained in:
bunnei 2014-06-22 15:40:21 -04:00
parent 6aebd4ac98
commit a7f1c54490
3 changed files with 141 additions and 74 deletions
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16
src/core/loader/loader.h
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@ -51,37 +51,37 @@ public:
* @param error ResultStatus result of function
* @return Reference to code buffer
*/
virtual const std::vector<u8>& GetCode(ResultStatus& error) const {
virtual const std::vector<u8>& ReadCode(ResultStatus& error) const {
error = ResultStatus::ErrorNotImplemented;
return code;
}
/**
* Get the icon (typically .icon section) of the application
* Get the icon (typically icon section) of the application
* @param error ResultStatus result of function
* @return Reference to icon buffer
*/
virtual const std::vector<u8>& GetIcon(ResultStatus& error) const {
virtual const std::vector<u8>& ReadIcon(ResultStatus& error) const {
error = ResultStatus::ErrorNotImplemented;
return icon;
}
/**
* Get the banner (typically .banner section) of the application
* Get the banner (typically banner section) of the application
* @param error ResultStatus result of function
* @return Reference to banner buffer
*/
virtual const std::vector<u8>& GetBanner(ResultStatus& error) const {
virtual const std::vector<u8>& ReadBanner(ResultStatus& error) const {
error = ResultStatus::ErrorNotImplemented;
return banner;
}
/**
* Get the logo (typically .logo section) of the application
* Get the logo (typically logo section) of the application
* @param error ResultStatus result of function
* @return Reference to logo buffer
*/
virtual const std::vector<u8>& GetLogo(ResultStatus& error) const {
virtual const std::vector<u8>& ReadLogo(ResultStatus& error) const {
error = ResultStatus::ErrorNotImplemented;
return logo;
}
@ -91,7 +91,7 @@ public:
* @param error ResultStatus result of function
* @return Reference to RomFs archive buffer
*/
virtual const std::vector<u8>& GetRomFs(ResultStatus error) const {
virtual const std::vector<u8>& ReadRomFS(ResultStatus& error) const {
error = ResultStatus::ErrorNotImplemented;
return romfs;
}

142
src/core/loader/ncch.cpp
View File

@ -113,36 +113,39 @@ AppLoader_NCCH::AppLoader_NCCH(const std::string& filename) {
/// AppLoader_NCCH destructor
AppLoader_NCCH::~AppLoader_NCCH() {
if (file.IsOpen())
file.Close();
}
/**
* Loads .code section into memory for booting
* @return ResultStatus result of function
*/
ResultStatus AppLoader_NCCH::LoadExec() const {
ResultStatus AppLoader_NCCH::LoadExec() {
if (!is_loaded)
return ResultStatus::ErrorNotLoaded;
for (std::vector<u8>::size_type i = 0; i != code.size(); i++) {
Memory::Write8(entry_point + i, code[i]);
ResultStatus res;
code = ReadCode(res);
if (ResultStatus::Success == res) {
Memory::WriteBlock(entry_point, &code[0], code.size());
Kernel::LoadExec(entry_point);
}
Kernel::LoadExec(entry_point);
return ResultStatus::Success;
return res;
}
/**
* Reads an application ExeFS section of an NCCH file into AppLoader (e.g. .code, .logo, etc.)
* @param file Handle to file to read from
* @param name Name of section to read out of NCCH file
* @param buffer Buffer to read section into.
* @param buffer Vector to read data into
* @param error ResultStatus result of function
* @return Reference to buffer of data that was read
*/
ResultStatus AppLoader_NCCH::LoadSectionExeFS(File::IOFile& file, const char* name,
std::vector<u8>& buffer) {
const std::vector<u8>& AppLoader_NCCH::LoadSectionExeFS(const char* name, std::vector<u8>& buffer,
ResultStatus& error) {
// Iterate through the ExeFs archive until we find the .code file...
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);
@ -161,49 +164,27 @@ ResultStatus AppLoader_NCCH::LoadSectionExeFS(File::IOFile& file, const char* na
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);
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],
if (!LZSS_Decompress(&temp_buffer[0], exefs_header.section[i].size, &buffer[0],
decompressed_size)) {
return ResultStatus::ErrorInvalidFormat;
error = ResultStatus::ErrorInvalidFormat;
return buffer;
}
// Section is uncompressed...
} else {
buffer.resize(exefs_header.section[i].size);
file.ReadBytes(&buffer[0], exefs_header.section[i].size);
}
return ResultStatus::Success;
error = ResultStatus::Success;
return buffer;
}
}
return ResultStatus::ErrorNotUsed;
error = ResultStatus::ErrorNotUsed;
return buffer;
}
/**
* Reads RomFS of an NCCH file into AppLoader
* @param file Handle to file to read from
* @return ResultStatus result of function
*/
ResultStatus AppLoader_NCCH::LoadRomFS(File::IOFile& file) {
// 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;
INFO_LOG(LOADER, "RomFS offset: 0x%08X", romfs_offset);
INFO_LOG(LOADER, "RomFS size: 0x%08X", romfs_size);
romfs.resize(romfs_size);
file.Seek(romfs_offset, 0);
file.ReadBytes(&romfs[0], romfs_size);
return ResultStatus::Success;
} else {
NOTICE_LOG(LOADER, "RomFS unused");
}
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
@ -216,7 +197,7 @@ ResultStatus AppLoader_NCCH::Load() {
if (is_loaded)
return ResultStatus::ErrorAlreadyLoaded;
File::IOFile file(filename, "rb");
file = File::IOFile(filename, "rb");
if (file.IsOpen()) {
file.ReadBytes(&ncch_header, sizeof(NCCH_Header));
@ -255,15 +236,6 @@ ResultStatus AppLoader_NCCH::Load() {
file.Seek(exefs_offset + ncch_offset, 0);
file.ReadBytes(&exefs_header, sizeof(ExeFs_Header));
// TODO(bunnei): Check ResultStatus of these...
LoadSectionExeFS(file, ".code", code);
LoadSectionExeFS(file, "banner", banner);
LoadSectionExeFS(file, "icon", icon);
LoadSectionExeFS(file, "logo", logo);
LoadRomFS(file);
is_loaded = true; // Set state to loaded
LoadExec(); // Load the executable into memory for booting
@ -273,4 +245,68 @@ ResultStatus AppLoader_NCCH::Load() {
return ResultStatus::Error;
}
/**
* Get the code (typically .code section) of the application
* @param error ResultStatus result of function
* @return Reference to code buffer
*/
const std::vector<u8>& AppLoader_NCCH::ReadCode(ResultStatus& error) {
return LoadSectionExeFS(".code", code, error);
}
/**
* Get the icon (typically icon section) of the application
* @param error ResultStatus result of function
* @return Reference to icon buffer
*/
const std::vector<u8>& AppLoader_NCCH::ReadIcon(ResultStatus& error) {
return LoadSectionExeFS("icon", icon, error);
}
/**
* Get the banner (typically banner section) of the application
* @param error ResultStatus result of function
* @return Reference to banner buffer
*/
const std::vector<u8>& AppLoader_NCCH::ReadBanner(ResultStatus& error) {
return LoadSectionExeFS("banner", banner, error);
}
/**
* Get the logo (typically logo section) of the application
* @param error ResultStatus result of function
* @return Reference to logo buffer
*/
const std::vector<u8>& AppLoader_NCCH::ReadLogo(ResultStatus& error) {
return LoadSectionExeFS("logo", logo, error);
}
/**
* Get the RomFs archive of the application
* @param error ResultStatus result of function
* @return Reference to RomFs archive buffer
*/
const std::vector<u8>& AppLoader_NCCH::ReadRomFS(ResultStatus& error) {
// 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;
INFO_LOG(LOADER, "RomFS offset: 0x%08X", romfs_offset);
INFO_LOG(LOADER, "RomFS size: 0x%08X", romfs_size);
romfs.resize(romfs_size);
file.Seek(romfs_offset, 0);
file.ReadBytes(&romfs[0], romfs_size);
error = ResultStatus::Success;
return romfs;
} else {
NOTICE_LOG(LOADER, "RomFS unused");
}
error = ResultStatus::ErrorNotUsed;
return romfs;
}
} // namespace Loader

57
src/core/loader/ncch.h
View File

@ -156,35 +156,66 @@ public:
*/
ResultStatus Load();
/**
* Get the code (typically .code section) of the application
* @param error ResultStatus result of function
* @return Reference to code buffer
*/
const std::vector<u8>& ReadCode(ResultStatus& error);
/**
* Get the icon (typically icon section) of the application
* @param error ResultStatus result of function
* @return Reference to icon buffer
*/
const std::vector<u8>& ReadIcon(ResultStatus& error);
/**
* Get the banner (typically banner section) of the application
* @param error ResultStatus result of function
* @return Reference to banner buffer
*/
const std::vector<u8>& ReadBanner(ResultStatus& error);
/**
* Get the logo (typically logo section) of the application
* @param error ResultStatus result of function
* @return Reference to logo buffer
*/
const std::vector<u8>& ReadLogo(ResultStatus& error);
/**
* Get the RomFs archive of the application
* @param error ResultStatus result of function
* @return Reference to RomFs archive buffer
*/
const std::vector<u8>& ReadRomFS(ResultStatus& error);
private:
/**
* Reads an application ExeFS section of an NCCH file into AppLoader (e.g. .code, .logo, etc.)
* @param file Handle to file to read from
* @param name Name of section to read out of NCCH file
* @param buffer Buffer to read section into.
* @return ResultStatus result of function
* @param buffer Vector to read data into
* @param error ResultStatus result of function
* @return Reference to buffer of data that was read
*/
ResultStatus LoadSectionExeFS(File::IOFile& file, const char* name, std::vector<u8>& buffer);
/**
* Reads RomFS of an NCCH file into AppLoader
* @param file Handle to file to read from
* @return ResultStatus result of function
*/
ResultStatus LoadRomFS(File::IOFile& file);
const std::vector<u8>& LoadSectionExeFS(const char* name, std::vector<u8>& buffer,
ResultStatus& error);
/**
* Loads .code section into memory for booting
* @return ResultStatus result of function
*/
ResultStatus LoadExec() const;
ResultStatus LoadExec();
File::IOFile file;
std::string filename;
bool is_loaded;
bool is_compressed;
u32 entry_point;
u32 entry_point;
u32 ncch_offset; // Offset to NCCH header, can be 0 or after NCSD header
u32 exefs_offset;