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
|
// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include <cinttypes>
#include <cstring>
#include <vector>
#include "common/common_funcs.h"
#include "common/hex_util.h"
#include "common/logging/log.h"
#include "common/lz4_compression.h"
#include "common/settings.h"
#include "common/swap.h"
#include "core/core.h"
#include "core/file_sys/patch_manager.h"
#include "core/hle/kernel/code_set.h"
#include "core/hle/kernel/k_page_table.h"
#include "core/hle/kernel/k_process.h"
#include "core/hle/kernel/k_thread.h"
#include "core/loader/nso.h"
#include "core/memory.h"
#ifdef ARCHITECTURE_arm64
#include "core/arm/nce/patch.h"
#endif
namespace Loader {
namespace {
struct MODHeader {
u32_le magic;
u32_le dynamic_offset;
u32_le bss_start_offset;
u32_le bss_end_offset;
u32_le eh_frame_hdr_start_offset;
u32_le eh_frame_hdr_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.");
std::vector<u8> DecompressSegment(const std::vector<u8>& compressed_data,
const NSOSegmentHeader& header) {
std::vector<u8> uncompressed_data =
Common::Compression::DecompressDataLZ4(compressed_data, header.size);
ASSERT_MSG(uncompressed_data.size() == header.size, "{} != {}", header.size,
uncompressed_data.size());
return uncompressed_data;
}
constexpr u32 PageAlignSize(u32 size) {
return static_cast<u32>((size + Core::Memory::YUZU_PAGEMASK) & ~Core::Memory::YUZU_PAGEMASK);
}
} // Anonymous namespace
bool NSOHeader::IsSegmentCompressed(size_t segment_num) const {
ASSERT_MSG(segment_num < 3, "Invalid segment {}", segment_num);
return ((flags >> segment_num) & 1) != 0;
}
AppLoader_NSO::AppLoader_NSO(FileSys::VirtualFile file_) : AppLoader(std::move(file_)) {}
FileType AppLoader_NSO::IdentifyType(const FileSys::VirtualFile& in_file) {
u32 magic = 0;
if (in_file->ReadObject(&magic) != sizeof(magic)) {
return FileType::Error;
}
if (Common::MakeMagic('N', 'S', 'O', '0') != magic) {
return FileType::Error;
}
return FileType::NSO;
}
std::optional<VAddr> AppLoader_NSO::LoadModule(Kernel::KProcess& process, Core::System& system,
const FileSys::VfsFile& nso_file, VAddr load_base,
bool should_pass_arguments, bool load_into_process,
std::optional<FileSys::PatchManager> pm,
Core::NCE::Patcher* patch) {
if (nso_file.GetSize() < sizeof(NSOHeader)) {
return std::nullopt;
}
NSOHeader nso_header{};
if (sizeof(NSOHeader) != nso_file.ReadObject(&nso_header)) {
return std::nullopt;
}
if (nso_header.magic != Common::MakeMagic('N', 'S', 'O', '0')) {
return std::nullopt;
}
// Allocate some space at the beginning if we are patching in PreText mode.
const size_t module_start = [&]() -> size_t {
#ifdef ARCHITECTURE_arm64
if (patch && patch->GetPatchMode() == Core::NCE::PatchMode::PreText) {
return patch->GetSectionSize();
}
#endif
return 0;
}();
// Build program image
Kernel::CodeSet codeset;
Kernel::PhysicalMemory program_image;
for (std::size_t i = 0; i < nso_header.segments.size(); ++i) {
std::vector<u8> data = nso_file.ReadBytes(nso_header.segments_compressed_size[i],
nso_header.segments[i].offset);
if (nso_header.IsSegmentCompressed(i)) {
data = DecompressSegment(data, nso_header.segments[i]);
}
program_image.resize(module_start + nso_header.segments[i].location +
static_cast<u32>(data.size()));
std::memcpy(program_image.data() + module_start + nso_header.segments[i].location,
data.data(), data.size());
codeset.segments[i].addr = module_start + nso_header.segments[i].location;
codeset.segments[i].offset = module_start + nso_header.segments[i].location;
codeset.segments[i].size = nso_header.segments[i].size;
}
if (should_pass_arguments && !Settings::values.program_args.GetValue().empty()) {
const auto arg_data{Settings::values.program_args.GetValue()};
codeset.DataSegment().size += NSO_ARGUMENT_DATA_ALLOCATION_SIZE;
NSOArgumentHeader args_header{
NSO_ARGUMENT_DATA_ALLOCATION_SIZE, static_cast<u32_le>(arg_data.size()), {}};
const auto end_offset = program_image.size();
program_image.resize(static_cast<u32>(program_image.size()) +
NSO_ARGUMENT_DATA_ALLOCATION_SIZE);
std::memcpy(program_image.data() + end_offset, &args_header, sizeof(NSOArgumentHeader));
std::memcpy(program_image.data() + end_offset + sizeof(NSOArgumentHeader), arg_data.data(),
arg_data.size());
}
codeset.DataSegment().size += nso_header.segments[2].bss_size;
u32 image_size{
PageAlignSize(static_cast<u32>(program_image.size()) + nso_header.segments[2].bss_size)};
program_image.resize(image_size);
for (std::size_t i = 0; i < nso_header.segments.size(); ++i) {
codeset.segments[i].size = PageAlignSize(codeset.segments[i].size);
}
// Apply patches if necessary
const auto name = nso_file.GetName();
if (pm && (pm->HasNSOPatch(nso_header.build_id, name) || Settings::values.dump_nso)) {
std::vector<u8> pi_header(sizeof(NSOHeader) + program_image.size());
std::memcpy(pi_header.data(), &nso_header, sizeof(NSOHeader));
std::memcpy(pi_header.data() + sizeof(NSOHeader), program_image.data(),
program_image.size());
pi_header = pm->PatchNSO(pi_header, name);
std::copy(pi_header.begin() + sizeof(NSOHeader), pi_header.end(), program_image.data());
}
#ifdef ARCHITECTURE_arm64
// If we are computing the process code layout and using nce backend, patch.
const auto& code = codeset.CodeSegment();
if (patch && patch->GetPatchMode() == Core::NCE::PatchMode::None) {
// Patch SVCs and MRS calls in the guest code
patch->PatchText(program_image, code);
// Add patch section size to the module size.
image_size += patch->GetSectionSize();
} else if (patch) {
// Relocate code patch and copy to the program_image.
patch->RelocateAndCopy(load_base, code, program_image, &process.GetPostHandlers());
// Update patch section.
auto& patch_segment = codeset.PatchSegment();
patch_segment.addr =
patch->GetPatchMode() == Core::NCE::PatchMode::PreText ? 0 : image_size;
patch_segment.size = static_cast<u32>(patch->GetSectionSize());
// Add patch section size to the module size. In PreText mode image_size
// already contains the patch segment as part of module_start.
if (patch->GetPatchMode() == Core::NCE::PatchMode::PostData) {
image_size += patch_segment.size;
}
}
#endif
// If we aren't actually loading (i.e. just computing the process code layout), we are done
if (!load_into_process) {
return load_base + image_size;
}
// Apply cheats if they exist and the program has a valid title ID
if (pm) {
system.SetApplicationProcessBuildID(nso_header.build_id);
const auto cheats = pm->CreateCheatList(nso_header.build_id);
if (!cheats.empty()) {
system.RegisterCheatList(cheats, nso_header.build_id, load_base, image_size);
}
}
// Load codeset for current process
codeset.memory = std::move(program_image);
process.LoadModule(std::move(codeset), load_base);
return load_base + image_size;
}
AppLoader_NSO::LoadResult AppLoader_NSO::Load(Kernel::KProcess& process, Core::System& system) {
if (is_loaded) {
return {ResultStatus::ErrorAlreadyLoaded, {}};
}
modules.clear();
// Load module
const VAddr base_address = GetInteger(process.GetEntryPoint());
if (!LoadModule(process, system, *file, base_address, true, true)) {
return {ResultStatus::ErrorLoadingNSO, {}};
}
modules.insert_or_assign(base_address, file->GetName());
LOG_DEBUG(Loader, "loaded module {} @ 0x{:X}", file->GetName(), base_address);
is_loaded = true;
return {ResultStatus::Success, LoadParameters{Kernel::KThread::DefaultThreadPriority,
Core::Memory::DEFAULT_STACK_SIZE}};
}
ResultStatus AppLoader_NSO::ReadNSOModules(Modules& out_modules) {
out_modules = this->modules;
return ResultStatus::Success;
}
} // namespace Loader
|
