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
|
// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <utility>
#include <vector>
#include "common/common_funcs.h"
#include "common/common_types.h"
#include "common/file_util.h"
#include "common/logging/log.h"
#include "common/swap.h"
#include "core/core.h"
#include "core/file_sys/control_metadata.h"
#include "core/file_sys/vfs_offset.h"
#include "core/gdbstub/gdbstub.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/kernel/process.h"
#include "core/hle/kernel/resource_limit.h"
#include "core/loader/nro.h"
#include "core/memory.h"
namespace Loader {
struct NroSegmentHeader {
u32_le offset;
u32_le size;
};
static_assert(sizeof(NroSegmentHeader) == 0x8, "NroSegmentHeader has incorrect size.");
struct NroHeader {
INSERT_PADDING_BYTES(0x4);
u32_le module_header_offset;
INSERT_PADDING_BYTES(0x8);
u32_le magic;
INSERT_PADDING_BYTES(0x4);
u32_le file_size;
INSERT_PADDING_BYTES(0x4);
std::array<NroSegmentHeader, 3> segments; // Text, RoData, Data (in that order)
u32_le bss_size;
INSERT_PADDING_BYTES(0x44);
};
static_assert(sizeof(NroHeader) == 0x80, "NroHeader has incorrect size.");
struct ModHeader {
u32_le magic;
u32_le dynamic_offset;
u32_le bss_start_offset;
u32_le bss_end_offset;
u32_le unwind_start_offset;
u32_le unwind_end_offset;
u32_le module_offset; // Offset to runtime-generated module object. typically equal to .bss base
};
static_assert(sizeof(ModHeader) == 0x1c, "ModHeader has incorrect size.");
struct AssetSection {
u64_le offset;
u64_le size;
};
static_assert(sizeof(AssetSection) == 0x10, "AssetSection has incorrect size.");
struct AssetHeader {
u32_le magic;
u32_le format_version;
AssetSection icon;
AssetSection nacp;
AssetSection romfs;
};
static_assert(sizeof(AssetHeader) == 0x38, "AssetHeader has incorrect size.");
AppLoader_NRO::AppLoader_NRO(FileSys::VirtualFile file) : AppLoader(file) {
NroHeader nro_header{};
if (file->ReadObject(&nro_header) != sizeof(NroHeader)) {
return;
}
if (file->GetSize() >= nro_header.file_size + sizeof(AssetHeader)) {
const u64 offset = nro_header.file_size;
AssetHeader asset_header{};
if (file->ReadObject(&asset_header, offset) != sizeof(AssetHeader)) {
return;
}
if (asset_header.format_version != 0) {
LOG_WARNING(Loader,
"NRO Asset Header has format {}, currently supported format is 0. If "
"strange glitches occur with metadata, check NRO assets.",
asset_header.format_version);
}
if (asset_header.magic != Common::MakeMagic('A', 'S', 'E', 'T')) {
return;
}
if (asset_header.nacp.size > 0) {
nacp = std::make_unique<FileSys::NACP>(std::make_shared<FileSys::OffsetVfsFile>(
file, asset_header.nacp.size, offset + asset_header.nacp.offset, "Control.nacp"));
}
if (asset_header.romfs.size > 0) {
romfs = std::make_shared<FileSys::OffsetVfsFile>(
file, asset_header.romfs.size, offset + asset_header.romfs.offset, "game.romfs");
}
if (asset_header.icon.size > 0) {
icon_data = file->ReadBytes(asset_header.icon.size, offset + asset_header.icon.offset);
}
}
}
AppLoader_NRO::~AppLoader_NRO() = default;
FileType AppLoader_NRO::IdentifyType(const FileSys::VirtualFile& file) {
// Read NSO header
NroHeader nro_header{};
if (sizeof(NroHeader) != file->ReadObject(&nro_header)) {
return FileType::Error;
}
if (nro_header.magic == Common::MakeMagic('N', 'R', 'O', '0')) {
return FileType::NRO;
}
return FileType::Error;
}
static constexpr u32 PageAlignSize(u32 size) {
return (size + Memory::PAGE_MASK) & ~Memory::PAGE_MASK;
}
bool AppLoader_NRO::LoadNro(FileSys::VirtualFile file, VAddr load_base) {
// Read NSO header
NroHeader nro_header{};
if (sizeof(NroHeader) != file->ReadObject(&nro_header)) {
return {};
}
if (nro_header.magic != Common::MakeMagic('N', 'R', 'O', '0')) {
return {};
}
// Build program image
auto& kernel = Core::System::GetInstance().Kernel();
Kernel::SharedPtr<Kernel::CodeSet> codeset = Kernel::CodeSet::Create(kernel, "");
std::vector<u8> program_image = file->ReadBytes(PageAlignSize(nro_header.file_size));
if (program_image.size() != PageAlignSize(nro_header.file_size)) {
return {};
}
for (std::size_t i = 0; i < nro_header.segments.size(); ++i) {
codeset->segments[i].addr = nro_header.segments[i].offset;
codeset->segments[i].offset = nro_header.segments[i].offset;
codeset->segments[i].size = PageAlignSize(nro_header.segments[i].size);
}
// Read MOD header
ModHeader mod_header{};
// Default .bss to NRO header bss size if MOD0 section doesn't exist
u32 bss_size{PageAlignSize(nro_header.bss_size)};
std::memcpy(&mod_header, program_image.data() + nro_header.module_header_offset,
sizeof(ModHeader));
const bool has_mod_header{mod_header.magic == Common::MakeMagic('M', 'O', 'D', '0')};
if (has_mod_header) {
// Resize program image to include .bss section and page align each section
bss_size = PageAlignSize(mod_header.bss_end_offset - mod_header.bss_start_offset);
}
codeset->DataSegment().size += bss_size;
program_image.resize(static_cast<u32>(program_image.size()) + bss_size);
// Load codeset for current process
codeset->name = file->GetName();
codeset->memory = std::make_shared<std::vector<u8>>(std::move(program_image));
Core::CurrentProcess()->LoadModule(codeset, load_base);
// Register module with GDBStub
GDBStub::RegisterModule(codeset->name, load_base, load_base);
return true;
}
ResultStatus AppLoader_NRO::Load(Kernel::SharedPtr<Kernel::Process>& process) {
if (is_loaded) {
return ResultStatus::ErrorAlreadyLoaded;
}
// Load NRO
static constexpr VAddr base_addr{Memory::PROCESS_IMAGE_VADDR};
if (!LoadNro(file, base_addr)) {
return ResultStatus::ErrorLoadingNRO;
}
auto& kernel = Core::System::GetInstance().Kernel();
process->svc_access_mask.set();
process->resource_limit =
kernel.ResourceLimitForCategory(Kernel::ResourceLimitCategory::APPLICATION);
process->Run(base_addr, THREADPRIO_DEFAULT, Memory::DEFAULT_STACK_SIZE);
is_loaded = true;
return ResultStatus::Success;
}
ResultStatus AppLoader_NRO::ReadIcon(std::vector<u8>& buffer) {
if (icon_data.empty()) {
return ResultStatus::ErrorNoIcon;
}
buffer = icon_data;
return ResultStatus::Success;
}
ResultStatus AppLoader_NRO::ReadProgramId(u64& out_program_id) {
if (nacp == nullptr) {
return ResultStatus::ErrorNoControl;
}
out_program_id = nacp->GetTitleId();
return ResultStatus::Success;
}
ResultStatus AppLoader_NRO::ReadRomFS(FileSys::VirtualFile& dir) {
if (romfs == nullptr) {
return ResultStatus::ErrorNoRomFS;
}
dir = romfs;
return ResultStatus::Success;
}
ResultStatus AppLoader_NRO::ReadTitle(std::string& title) {
if (nacp == nullptr) {
return ResultStatus::ErrorNoControl;
}
title = nacp->GetApplicationName();
return ResultStatus::Success;
}
} // namespace Loader
|
