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Virtual Filesystem 2: Electric Boogaloo (#676)

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* Virtual Filesystem

* Fix delete bug and documentate

* Review fixes + other stuff

* Fix puyo regression
This commit is contained in:
Zach Hilman 2018-07-18 21:07:11 -04:00 • committed by bunnei
parent 924c473bb3
commit 29aff8d5ab
54 changed files with 1936 additions and 1969 deletions
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93
src/core/loader/nso.cpp
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@ -38,6 +38,7 @@ struct NsoHeader {
std::array<u32_le, 3> segments_compressed_size;
};
static_assert(sizeof(NsoHeader) == 0x6c, "NsoHeader has incorrect size.");
static_assert(std::is_trivially_copyable_v<NsoHeader>, "NsoHeader isn't trivially copyable.");
struct ModHeader {
u32_le magic;
@ -50,15 +51,11 @@ struct ModHeader {
};
static_assert(sizeof(ModHeader) == 0x1c, "ModHeader has incorrect size.");
AppLoader_NSO::AppLoader_NSO(FileUtil::IOFile&& file, std::string filepath)
: AppLoader(std::move(file)), filepath(std::move(filepath)) {}
AppLoader_NSO::AppLoader_NSO(FileSys::VirtualFile file) : AppLoader(std::move(file)) {}
FileType AppLoader_NSO::IdentifyType(FileUtil::IOFile& file, const std::string&) {
FileType AppLoader_NSO::IdentifyType(const FileSys::VirtualFile& file) {
u32 magic = 0;
file.Seek(0, SEEK_SET);
if (1 != file.ReadArray<u32>(&magic, 1)) {
return FileType::Error;
}
file->ReadObject(&magic);
if (Common::MakeMagic('N', 'S', 'O', '0') == magic) {
return FileType::NSO;
@ -99,13 +96,16 @@ static constexpr u32 PageAlignSize(u32 size) {
return (size + Memory::PAGE_MASK) & ~Memory::PAGE_MASK;
}
VAddr AppLoader_NSO::LoadModule(const std::string& name, const std::vector<u8>& file_data,
VAddr load_base) {
if (file_data.size() < sizeof(NsoHeader))
VAddr AppLoader_NSO::LoadModule(FileSys::VirtualFile file, VAddr load_base) {
if (file == nullptr)
return {};
NsoHeader nso_header;
std::memcpy(&nso_header, file_data.data(), sizeof(NsoHeader));
if (file->GetSize() < sizeof(NsoHeader))
return {};
NsoHeader nso_header{};
if (sizeof(NsoHeader) != file->ReadObject(&nso_header))
return {};
if (nso_header.magic != Common::MakeMagic('N', 'S', 'O', '0'))
return {};
@ -114,9 +114,8 @@ VAddr AppLoader_NSO::LoadModule(const std::string& name, const std::vector<u8>&
Kernel::SharedPtr<Kernel::CodeSet> codeset = Kernel::CodeSet::Create("");
std::vector<u8> program_image;
for (int i = 0; i < nso_header.segments.size(); ++i) {
std::vector<u8> compressed_data(nso_header.segments_compressed_size[i]);
for (auto j = 0; j < nso_header.segments_compressed_size[i]; ++j)
compressed_data[j] = file_data[nso_header.segments[i].offset + j];
const std::vector<u8> compressed_data =
file->ReadBytes(nso_header.segments_compressed_size[i], nso_header.segments[i].offset);
std::vector<u8> data = DecompressSegment(compressed_data, nso_header.segments[i]);
program_image.resize(nso_header.segments[i].location);
program_image.insert(program_image.end(), data.begin(), data.end());
@ -144,7 +143,7 @@ VAddr AppLoader_NSO::LoadModule(const std::string& name, const std::vector<u8>&
program_image.resize(image_size);
// Load codeset for current process
codeset->name = name;
codeset->name = file->GetName();
codeset->memory = std::make_shared<std::vector<u8>>(std::move(program_image));
Core::CurrentProcess()->LoadModule(codeset, load_base);
@ -154,72 +153,14 @@ VAddr AppLoader_NSO::LoadModule(const std::string& name, const std::vector<u8>&
return load_base + image_size;
}
VAddr AppLoader_NSO::LoadModule(const std::string& path, VAddr load_base) {
FileUtil::IOFile file(path, "rb");
if (!file.IsOpen()) {
return {};
}
// Read NSO header
NsoHeader nso_header{};
file.Seek(0, SEEK_SET);
if (sizeof(NsoHeader) != file.ReadBytes(&nso_header, sizeof(NsoHeader))) {
return {};
}
if (nso_header.magic != Common::MakeMagic('N', 'S', 'O', '0')) {
return {};
}
// Build program image
Kernel::SharedPtr<Kernel::CodeSet> codeset = Kernel::CodeSet::Create("");
std::vector<u8> program_image;
for (int i = 0; i < nso_header.segments.size(); ++i) {
std::vector<u8> data =
ReadSegment(file, nso_header.segments[i], nso_header.segments_compressed_size[i]);
program_image.resize(nso_header.segments[i].location);
program_image.insert(program_image.end(), data.begin(), data.end());
codeset->segments[i].addr = nso_header.segments[i].location;
codeset->segments[i].offset = nso_header.segments[i].location;
codeset->segments[i].size = PageAlignSize(static_cast<u32>(data.size()));
}
// MOD header pointer is at .text offset + 4
u32 module_offset;
std::memcpy(&module_offset, program_image.data() + 4, sizeof(u32));
// Read MOD header
ModHeader mod_header{};
// Default .bss to size in segment header if MOD0 section doesn't exist
u32 bss_size{PageAlignSize(nso_header.segments[2].bss_size)};
std::memcpy(&mod_header, program_image.data() + module_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->data.size += bss_size;
const u32 image_size{PageAlignSize(static_cast<u32>(program_image.size()) + bss_size)};
program_image.resize(image_size);
// Load codeset for current process
codeset->name = path;
codeset->memory = std::make_shared<std::vector<u8>>(std::move(program_image));
Core::CurrentProcess()->LoadModule(codeset, load_base);
return load_base + image_size;
}
ResultStatus AppLoader_NSO::Load(Kernel::SharedPtr<Kernel::Process>& process) {
if (is_loaded) {
return ResultStatus::ErrorAlreadyLoaded;
}
if (!file.IsOpen()) {
return ResultStatus::Error;
}
// Load module
LoadModule(filepath, Memory::PROCESS_IMAGE_VADDR);
LOG_DEBUG(Loader, "loaded module {} @ 0x{:X}", filepath, Memory::PROCESS_IMAGE_VADDR);
LoadModule(file, Memory::PROCESS_IMAGE_VADDR);
LOG_DEBUG(Loader, "loaded module {} @ 0x{:X}", file->GetName(), Memory::PROCESS_IMAGE_VADDR);
process->svc_access_mask.set();
process->address_mappings = default_address_mappings;