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/**
* Copyright (C) 2013 Citrus Emulator
*
* @file loader.cpp
* @author ShizZy <shizzy247@gmail.com>
* @date 2013-09-18
* @brief Loads bootable binaries into the emu
*
* @section LICENSE
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details at
* http://www.gnu.org/copyleft/gpl.html
*
* Official project repository can be found at:
* http://code.google.com/p/gekko-gc-emu/
*/
#include "file_util.h"
#include "loader.h"
#include "system.h"
#include "core.h"
#include "file_sys/directory_file_system.h"
#include "elf/elf_reader.h"
////////////////////////////////////////////////////////////////////////////////////////////////////
/// Loads an extracted CXI from a directory
bool LoadDirectory_CXI(std::string &filename) {
std::string full_path = filename;
std::string path, file, extension;
SplitPath(ReplaceAll(full_path, "\\", "/"), &path, &file, &extension);
#if EMU_PLATFORM == PLATFORM_WINDOWS
path = ReplaceAll(path, "/", "\\");
#endif
DirectoryFileSystem *fs = new DirectoryFileSystem(&System::g_ctr_file_system, path);
System::g_ctr_file_system.Mount("fs:", fs);
std::string final_name = "fs:/" + file + extension;
File::IOFile f(filename, "rb");
if (f.IsOpen()) {
// TODO(ShizZy): read here to memory....
}
ERROR_LOG(TIME, "Unimplemented function!");
return true;
}
/// Loads a CTR ELF file
bool Load_ELF(std::string &filename) {
std::string full_path = filename;
std::string path, file, extension;
SplitPath(ReplaceAll(full_path, "\\", "/"), &path, &file, &extension);
#if EMU_PLATFORM == PLATFORM_WINDOWS
path = ReplaceAll(path, "/", "\\");
#endif
File::IOFile f(filename, "rb");
if (f.IsOpen()) {
u64 size = f.GetSize();
u8* buffer = new u8[size];
ElfReader* elf_reader = NULL;
f.ReadBytes(buffer, size);
elf_reader = new ElfReader(buffer);
elf_reader->LoadInto(0x00100000);
Core::g_app_core->SetPC(elf_reader->GetEntryPoint());
delete[] buffer;
delete elf_reader;
} else {
return false;
}
f.Close();
return true;
}
namespace Loader {
bool IsBootableDirectory() {
ERROR_LOG(TIME, "Unimplemented function!");
return true;
}
/**
* Identifies the type of a bootable file
* @param filename String filename of bootable file
* @todo (ShizZy) this function sucks... make it actually check file contents etc.
* @return FileType of file
*/
FileType IdentifyFile(std::string &filename) {
if (filename.size() == 0) {
ERROR_LOG(LOADER, "invalid filename %s", filename.c_str());
return FILETYPE_ERROR;
}
std::string extension = filename.size() >= 5 ? filename.substr(filename.size() - 4) : "";
if (File::IsDirectory(filename)) {
if (IsBootableDirectory()) {
return FILETYPE_DIRECTORY_CXI;
}
else {
return FILETYPE_NORMAL_DIRECTORY;
}
}
else if (!strcasecmp(extension.c_str(), ".elf")) {
return FILETYPE_CTR_ELF; // TODO(bunnei): Do some filetype checking :p
}
else if (!strcasecmp(extension.c_str(), ".zip")) {
return FILETYPE_ARCHIVE_ZIP;
}
else if (!strcasecmp(extension.c_str(), ".rar")) {
return FILETYPE_ARCHIVE_RAR;
}
else if (!strcasecmp(extension.c_str(), ".r00")) {
return FILETYPE_ARCHIVE_RAR;
}
else if (!strcasecmp(extension.c_str(), ".r01")) {
return FILETYPE_ARCHIVE_RAR;
}
return FILETYPE_UNKNOWN;
}
/**
* Identifies and loads a bootable file
* @param filename String filename of bootable file
* @param error_string Point to string to put error message if an error has occurred
* @return True on success, otherwise false
*/
bool LoadFile(std::string &filename, std::string *error_string) {
INFO_LOG(LOADER, "Identifying file...");
// Note that this can modify filename!
switch (IdentifyFile(filename)) {
case FILETYPE_CTR_ELF:
return Load_ELF(filename);
case FILETYPE_DIRECTORY_CXI:
return LoadDirectory_CXI(filename);
case FILETYPE_ERROR:
ERROR_LOG(LOADER, "Could not read file");
*error_string = "Error reading file";
break;
case FILETYPE_ARCHIVE_RAR:
#ifdef WIN32
*error_string = "RAR file detected (Require WINRAR)";
#else
*error_string = "RAR file detected (Require UnRAR)";
#endif
break;
case FILETYPE_ARCHIVE_ZIP:
#ifdef WIN32
*error_string = "ZIP file detected (Require WINRAR)";
#else
*error_string = "ZIP file detected (Require UnRAR)";
#endif
break;
case FILETYPE_NORMAL_DIRECTORY:
ERROR_LOG(LOADER, "Just a directory.");
*error_string = "Just a directory.";
break;
case FILETYPE_UNKNOWN_BIN:
case FILETYPE_UNKNOWN_ELF:
case FILETYPE_UNKNOWN:
default:
ERROR_LOG(LOADER, "Failed to identify file");
*error_string = "Failed to identify file";
break;
}
return false;
}
} // namespace
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