yuzu/src/core/loader/nro.cpp
Subv 827f8ca3c7 Kernel: Store the program id in the Process class instead of the CodeSet class.
There may be many CodeSets per Process, so it's wasteful and overcomplicated to store the program id in each of them.
2018-03-01 19:03:53 -05:00

148 lines
4.7 KiB
C++

// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <vector>
#include "common/common_funcs.h"
#include "common/file_util.h"
#include "common/logging/log.h"
#include "common/swap.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.");
AppLoader_NRO::AppLoader_NRO(FileUtil::IOFile&& file, std::string filepath)
: AppLoader(std::move(file)), filepath(std::move(filepath)) {}
FileType AppLoader_NRO::IdentifyType(FileUtil::IOFile& file, const std::string&) {
// Read NSO header
NroHeader nro_header{};
file.Seek(0, SEEK_SET);
if (sizeof(NroHeader) != file.ReadBytes(&nro_header, sizeof(NroHeader))) {
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(const std::string& path, VAddr load_base) {
FileUtil::IOFile file(path, "rb");
if (!file.IsOpen()) {
return {};
}
// Read NSO header
NroHeader nro_header{};
file.Seek(0, SEEK_SET);
if (sizeof(NroHeader) != file.ReadBytes(&nro_header, sizeof(NroHeader))) {
return {};
}
if (nro_header.magic != Common::MakeMagic('N', 'R', 'O', '0')) {
return {};
}
// Build program image
Kernel::SharedPtr<Kernel::CodeSet> codeset = Kernel::CodeSet::Create("");
std::vector<u8> program_image;
program_image.resize(PageAlignSize(nro_header.file_size));
file.Seek(0, SEEK_SET);
file.ReadBytes(program_image.data(), nro_header.file_size);
for (int 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->data.size += bss_size;
program_image.resize(static_cast<u32>(program_image.size()) + bss_size);
// Load codeset for current process
codeset->name = path;
codeset->memory = std::make_shared<std::vector<u8>>(std::move(program_image));
Kernel::g_current_process->LoadModule(codeset, load_base);
return true;
}
ResultStatus AppLoader_NRO::Load(Kernel::SharedPtr<Kernel::Process>& process) {
if (is_loaded) {
return ResultStatus::ErrorAlreadyLoaded;
}
if (!file.IsOpen()) {
return ResultStatus::Error;
}
process = Kernel::Process::Create("main", 0);
// Load NRO
static constexpr VAddr base_addr{Memory::PROCESS_IMAGE_VADDR};
if (!LoadNro(filepath, base_addr)) {
return ResultStatus::ErrorInvalidFormat;
}
process->svc_access_mask.set();
process->address_mappings = default_address_mappings;
process->resource_limit =
Kernel::ResourceLimit::GetForCategory(Kernel::ResourceLimitCategory::APPLICATION);
process->Run(base_addr, 48, Kernel::DEFAULT_STACK_SIZE);
is_loaded = true;
return ResultStatus::Success;
}
} // namespace Loader