summaryrefslogtreecommitdiffstats
path: root/src/core/loader.cpp
blob: a1f5dcdb59eb2248d6032ef620e75be9e0101edc (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.

#include "common/common_types.h"
#include "common/file_util.h"

#include "core/loader.h"
#include "core/system.h"
#include "core/core.h"
#include "core/file_sys/directory_file_system.h"
#include "core/elf/elf_reader.h"
#include "core/hle/kernel/kernel.h"
#include "core/mem_map.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);

        __KernelLoadExec(elf_reader->GetEntryPoint());

        delete[] buffer;
        delete elf_reader;
    } else {
        return false;
    }
    f.Close();

    return true;
}

/// Loads a Launcher DAT file
bool Load_DAT(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];

        f.ReadBytes(buffer, size);

        /**
        * (mattvail) We shouldn't really support this type of file
        * but for the sake of making it easier... we'll temporarily/hackishly
        * allow it. No sense in making a proper reader for this.
        */
        u32 entry_point = 0x00100000; // write to same entrypoint as elf
        u32 payload_offset = 0xA150;
        
        const u8 *src = &buffer[payload_offset];
        u8 *dst = Memory::GetPointer(entry_point);
        u32 srcSize = size - payload_offset; //just load everything...
        u32 *s = (u32*)src;
        u32 *d = (u32*)dst;
        for (int j = 0; j < (int)(srcSize + 3) / 4; j++)
        {
            *d++ = (*s++);
        }
        
        __KernelLoadExec(entry_point);


        delete[] buffer;
    }
    else {
        return false;
    }
    f.Close();

    return true;
}


/// Loads a CTR BIN file extracted from an ExeFS
bool Load_BIN(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];

        f.ReadBytes(buffer, size);

        u32 entry_point = 0x00100000; // Hardcoded, read from exheader
        
        const u8 *src = buffer;
        u8 *dst = Memory::GetPointer(entry_point);
        u32 srcSize = size;
        u32 *s = (u32*)src;
        u32 *d = (u32*)dst;
        for (int j = 0; j < (int)(srcSize + 3) / 4; j++)
        {
            *d++ = (*s++);
        }
        
        __KernelLoadExec(entry_point);

        delete[] buffer;
    }
    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(), ".bin")) {
        return FILETYPE_CTR_BIN;
    }
    else if (!strcasecmp(extension.c_str(), ".dat")) {
        return FILETYPE_LAUNCHER_DAT;
    }
    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_CTR_BIN:
        return Load_BIN(filename);

    case FILETYPE_LAUNCHER_DAT:
        return Load_DAT(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