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
|
// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/logging/log.h"
#include "core/file_sys/content_archive.h"
#include "core/file_sys/vfs_offset.h"
#include "core/loader/loader.h"
namespace FileSys {
// Media offsets in headers are stored divided by 512. Mult. by this to get real offset.
constexpr u64 MEDIA_OFFSET_MULTIPLIER = 0x200;
constexpr u64 SECTION_HEADER_SIZE = 0x200;
constexpr u64 SECTION_HEADER_OFFSET = 0x400;
constexpr u32 IVFC_MAX_LEVEL = 6;
enum class NCASectionFilesystemType : u8 {
PFS0 = 0x2,
ROMFS = 0x3,
};
struct NCASectionHeaderBlock {
INSERT_PADDING_BYTES(3);
NCASectionFilesystemType filesystem_type;
u8 crypto_type;
INSERT_PADDING_BYTES(3);
};
static_assert(sizeof(NCASectionHeaderBlock) == 0x8, "NCASectionHeaderBlock has incorrect size.");
struct PFS0Superblock {
NCASectionHeaderBlock header_block;
std::array<u8, 0x20> hash;
u32_le size;
INSERT_PADDING_BYTES(4);
u64_le hash_table_offset;
u64_le hash_table_size;
u64_le pfs0_header_offset;
u64_le pfs0_size;
INSERT_PADDING_BYTES(432);
};
static_assert(sizeof(PFS0Superblock) == 0x200, "PFS0Superblock has incorrect size.");
struct IVFCLevel {
u64_le offset;
u64_le size;
u32_le block_size;
u32_le reserved;
};
static_assert(sizeof(IVFCLevel) == 0x18, "IVFCLevel has incorrect size.");
struct RomFSSuperblock {
NCASectionHeaderBlock header_block;
u32_le magic;
u32_le magic_number;
INSERT_PADDING_BYTES(8);
std::array<IVFCLevel, 6> levels;
INSERT_PADDING_BYTES(64);
};
static_assert(sizeof(RomFSSuperblock) == 0xE8, "RomFSSuperblock has incorrect size.");
NCA::NCA(VirtualFile file_) : file(file_) {
if (sizeof(NCAHeader) != file->ReadObject(&header))
LOG_CRITICAL(Loader, "File reader errored out during header read.");
if (!IsValidNCA(header)) {
status = Loader::ResultStatus::ErrorInvalidFormat;
return;
}
std::ptrdiff_t number_sections =
std::count_if(std::begin(header.section_tables), std::end(header.section_tables),
[](NCASectionTableEntry entry) { return entry.media_offset > 0; });
for (std::ptrdiff_t i = 0; i < number_sections; ++i) {
// Seek to beginning of this section.
NCASectionHeaderBlock block{};
if (sizeof(NCASectionHeaderBlock) !=
file->ReadObject(&block, SECTION_HEADER_OFFSET + i * SECTION_HEADER_SIZE))
LOG_CRITICAL(Loader, "File reader errored out during header read.");
if (block.filesystem_type == NCASectionFilesystemType::ROMFS) {
RomFSSuperblock sb{};
if (sizeof(RomFSSuperblock) !=
file->ReadObject(&sb, SECTION_HEADER_OFFSET + i * SECTION_HEADER_SIZE))
LOG_CRITICAL(Loader, "File reader errored out during header read.");
const size_t romfs_offset =
header.section_tables[i].media_offset * MEDIA_OFFSET_MULTIPLIER +
sb.levels[IVFC_MAX_LEVEL - 1].offset;
const size_t romfs_size = sb.levels[IVFC_MAX_LEVEL - 1].size;
files.emplace_back(std::make_shared<OffsetVfsFile>(file, romfs_size, romfs_offset));
romfs = files.back();
} else if (block.filesystem_type == NCASectionFilesystemType::PFS0) {
PFS0Superblock sb{};
// Seek back to beginning of this section.
if (sizeof(PFS0Superblock) !=
file->ReadObject(&sb, SECTION_HEADER_OFFSET + i * SECTION_HEADER_SIZE))
LOG_CRITICAL(Loader, "File reader errored out during header read.");
u64 offset = (static_cast<u64>(header.section_tables[i].media_offset) *
MEDIA_OFFSET_MULTIPLIER) +
sb.pfs0_header_offset;
u64 size = MEDIA_OFFSET_MULTIPLIER * (header.section_tables[i].media_end_offset -
header.section_tables[i].media_offset);
auto npfs = std::make_shared<PartitionFilesystem>(
std::make_shared<OffsetVfsFile>(file, size, offset));
if (npfs->GetStatus() == Loader::ResultStatus::Success) {
dirs.emplace_back(npfs);
if (IsDirectoryExeFS(dirs.back()))
exefs = dirs.back();
}
}
}
status = Loader::ResultStatus::Success;
}
Loader::ResultStatus NCA::GetStatus() const {
return status;
}
std::vector<std::shared_ptr<VfsFile>> NCA::GetFiles() const {
if (status != Loader::ResultStatus::Success)
return {};
return files;
}
std::vector<std::shared_ptr<VfsDirectory>> NCA::GetSubdirectories() const {
if (status != Loader::ResultStatus::Success)
return {};
return dirs;
}
std::string NCA::GetName() const {
return file->GetName();
}
std::shared_ptr<VfsDirectory> NCA::GetParentDirectory() const {
return file->GetContainingDirectory();
}
NCAContentType NCA::GetType() const {
return header.content_type;
}
u64 NCA::GetTitleId() const {
if (status != Loader::ResultStatus::Success)
return {};
return header.title_id;
}
VirtualFile NCA::GetRomFS() const {
return romfs;
}
VirtualDir NCA::GetExeFS() const {
return exefs;
}
bool NCA::ReplaceFileWithSubdirectory(VirtualFile file, VirtualDir dir) {
return false;
}
} // namespace FileSys
|
