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pl_u: Eliminate mutable file-scope state 

Converts the PL_U internals to use the PImpl idiom and makes the state
part of the Impl struct, eliminating mutable global/file state.
This commit is contained in:
Lioncash 2018-09-11 21:06:40 -04:00
parent 1470b85af9
commit c061e27155
2 changed files with 88 additions and 66 deletions
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128
src/core/hle/service/ns/pl_u.cpp
View File

@ -2,6 +2,10 @@
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <cstring>
#include <vector>
#include <FontChineseSimplified.h>
#include <FontChineseTraditional.h>
#include <FontExtendedChineseSimplified.h>
@ -9,14 +13,19 @@
#include <FontNintendoExtended.h>
#include <FontStandard.h>
#include "common/assert.h"
#include "common/common_paths.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/content_archive.h"
#include "core/file_sys/nca_metadata.h"
#include "core/file_sys/registered_cache.h"
#include "core/file_sys/romfs.h"
#include "core/hle/ipc_helpers.h"
#include "core/hle/kernel/shared_memory.h"
#include "core/hle/service/filesystem/filesystem.h"
#include "core/hle/service/ns/pl_u.h"
@ -35,49 +44,41 @@ struct FontRegion {
u32 size;
};
static constexpr std::array<std::pair<FontArchives, const char*>, 7> SHARED_FONTS{
constexpr std::array<std::pair<FontArchives, const char*>, 7> SHARED_FONTS{
std::make_pair(FontArchives::Standard, "nintendo_udsg-r_std_003.bfttf"),
std::make_pair(FontArchives::ChineseSimple, "nintendo_udsg-r_org_zh-cn_003.bfttf"),
std::make_pair(FontArchives::ChineseSimple, "nintendo_udsg-r_ext_zh-cn_003.bfttf"),
std::make_pair(FontArchives::ChineseTraditional, "nintendo_udjxh-db_zh-tw_003.bfttf"),
std::make_pair(FontArchives::Korean, "nintendo_udsg-r_ko_003.bfttf"),
std::make_pair(FontArchives::Extension, "nintendo_ext_003.bfttf"),
std::make_pair(FontArchives::Extension, "nintendo_ext2_003.bfttf")};
std::make_pair(FontArchives::Extension, "nintendo_ext2_003.bfttf"),
};
static constexpr std::array<const char*, 7> SHARED_FONTS_TTF{"FontStandard.ttf",
constexpr std::array<const char*, 7> SHARED_FONTS_TTF{
"FontStandard.ttf",
"FontChineseSimplified.ttf",
"FontExtendedChineseSimplified.ttf",
"FontChineseTraditional.ttf",
"FontKorean.ttf",
"FontNintendoExtended.ttf",
"FontNintendoExtended2.ttf"};
"FontNintendoExtended2.ttf",
};
// The below data is specific to shared font data dumped from Switch on f/w 2.2
// Virtual address and offsets/sizes likely will vary by dump
static constexpr VAddr SHARED_FONT_MEM_VADDR{0x00000009d3016000ULL};
static constexpr u32 EXPECTED_RESULT{
0x7f9a0218}; // What we expect the decrypted bfttf first 4 bytes to be
static constexpr u32 EXPECTED_MAGIC{
0x36f81a1e}; // What we expect the encrypted bfttf first 4 bytes to be
static constexpr u64 SHARED_FONT_MEM_SIZE{0x1100000};
static constexpr FontRegion EMPTY_REGION{0, 0};
std::vector<FontRegion>
SHARED_FONT_REGIONS{}; // Automatically populated based on shared_fonts dump or system archives
const FontRegion& GetSharedFontRegion(size_t index) {
if (index >= SHARED_FONT_REGIONS.size() || SHARED_FONT_REGIONS.empty()) {
// No font fallback
return EMPTY_REGION;
}
return SHARED_FONT_REGIONS.at(index);
}
constexpr VAddr SHARED_FONT_MEM_VADDR{0x00000009d3016000ULL};
constexpr u32 EXPECTED_RESULT{0x7f9a0218}; // What we expect the decrypted bfttf first 4 bytes to be
constexpr u32 EXPECTED_MAGIC{0x36f81a1e}; // What we expect the encrypted bfttf first 4 bytes to be
constexpr u64 SHARED_FONT_MEM_SIZE{0x1100000};
constexpr FontRegion EMPTY_REGION{0, 0};
enum class LoadState : u32 {
Loading = 0,
Done = 1,
};
void DecryptSharedFont(const std::vector<u32>& input, std::vector<u8>& output, size_t& offset) {
static void DecryptSharedFont(const std::vector<u32>& input, std::vector<u8>& output,
size_t& offset) {
ASSERT_MSG(offset + (input.size() * sizeof(u32)) < SHARED_FONT_MEM_SIZE,
"Shared fonts exceeds 17mb!");
ASSERT_MSG(input[0] == EXPECTED_MAGIC, "Failed to derive key, unexpected magic number");
@ -104,28 +105,52 @@ static void EncryptSharedFont(const std::vector<u8>& input, std::vector<u8>& out
offset += input.size() + (sizeof(u32) * 2);
}
// Helper function to make BuildSharedFontsRawRegions a bit nicer
static u32 GetU32Swapped(const u8* data) {
u32 value;
std::memcpy(&value, data, sizeof(value));
return Common::swap32(value); // Helper function to make BuildSharedFontsRawRegions a bit nicer
return Common::swap32(value);
}
void BuildSharedFontsRawRegions(const std::vector<u8>& input) {
unsigned cur_offset = 0; // As we can derive the xor key we can just populate the offsets based
// on the shared memory dump
struct PL_U::Impl {
const FontRegion& GetSharedFontRegion(size_t index) const {
if (index >= shared_font_regions.size() || shared_font_regions.empty()) {
// No font fallback
return EMPTY_REGION;
}
return shared_font_regions.at(index);
}
void BuildSharedFontsRawRegions(const std::vector<u8>& input) {
// As we can derive the xor key we can just populate the offsets
// based on the shared memory dump
unsigned cur_offset = 0;
for (size_t i = 0; i < SHARED_FONTS.size(); i++) {
// Out of shared fonts/Invalid font
if (GetU32Swapped(input.data() + cur_offset) != EXPECTED_RESULT)
// Out of shared fonts/invalid font
if (GetU32Swapped(input.data() + cur_offset) != EXPECTED_RESULT) {
break;
const u32 KEY = GetU32Swapped(input.data() + cur_offset) ^
EXPECTED_MAGIC; // Derive key withing inverse xor
}
// Derive key withing inverse xor
const u32 KEY = GetU32Swapped(input.data() + cur_offset) ^ EXPECTED_MAGIC;
const u32 SIZE = GetU32Swapped(input.data() + cur_offset + 4) ^ KEY;
SHARED_FONT_REGIONS.push_back(FontRegion{cur_offset + 8, SIZE});
shared_font_regions.push_back(FontRegion{cur_offset + 8, SIZE});
cur_offset += SIZE + 8;
}
}
}
PL_U::PL_U() : ServiceFramework("pl:u") {
/// Handle to shared memory region designated for a shared font
Kernel::SharedPtr<Kernel::SharedMemory> shared_font_mem;
/// Backing memory for the shared font data
std::shared_ptr<std::vector<u8>> shared_font;
// Automatically populated based on shared_fonts dump or system archives.
std::vector<FontRegion> shared_font_regions;
};
PL_U::PL_U() : ServiceFramework("pl:u"), impl{std::make_unique<Impl>()} {
static const FunctionInfo functions[] = {
{0, &PL_U::RequestLoad, "RequestLoad"},
{1, &PL_U::GetLoadState, "GetLoadState"},
@ -141,7 +166,7 @@ PL_U::PL_U() : ServiceFramework("pl:u") {
// Rebuild shared fonts from data ncas
if (nand->HasEntry(static_cast<u64>(FontArchives::Standard),
FileSys::ContentRecordType::Data)) {
shared_font = std::make_shared<std::vector<u8>>(SHARED_FONT_MEM_SIZE);
impl->shared_font = std::make_shared<std::vector<u8>>(SHARED_FONT_MEM_SIZE);
for (auto font : SHARED_FONTS) {
const auto nca =
nand->GetEntry(static_cast<u64>(font.first), FileSys::ContentRecordType::Data);
@ -177,12 +202,12 @@ PL_U::PL_U() : ServiceFramework("pl:u") {
static_cast<u32>(offset + 8),
static_cast<u32>((font_data_u32.size() * sizeof(u32)) -
8)}; // Font offset and size do not account for the header
DecryptSharedFont(font_data_u32, *shared_font, offset);
SHARED_FONT_REGIONS.push_back(region);
DecryptSharedFont(font_data_u32, *impl->shared_font, offset);
impl->shared_font_regions.push_back(region);
}
} else {
shared_font = std::make_shared<std::vector<u8>>(
impl->shared_font = std::make_shared<std::vector<u8>>(
SHARED_FONT_MEM_SIZE); // Shared memory needs to always be allocated and a fixed size
const std::string user_path = FileUtil::GetUserPath(FileUtil::UserPath::SysDataDir);
@ -206,8 +231,8 @@ PL_U::PL_U() : ServiceFramework("pl:u") {
static_cast<u32>(offset + 8),
static_cast<u32>(ttf_bytes.size())}; // Font offset and size do not account
// for the header
EncryptSharedFont(ttf_bytes, *shared_font, offset);
SHARED_FONT_REGIONS.push_back(region);
EncryptSharedFont(ttf_bytes, *impl->shared_font, offset);
impl->shared_font_regions.push_back(region);
} else {
LOG_WARNING(Service_NS, "Unable to load font: {}", font_ttf);
}
@ -222,8 +247,8 @@ PL_U::PL_U() : ServiceFramework("pl:u") {
if (file.IsOpen()) {
// Read shared font data
ASSERT(file.GetSize() == SHARED_FONT_MEM_SIZE);
file.ReadBytes(shared_font->data(), shared_font->size());
BuildSharedFontsRawRegions(*shared_font);
file.ReadBytes(impl->shared_font->data(), impl->shared_font->size());
impl->BuildSharedFontsRawRegions(*impl->shared_font);
} else {
LOG_WARNING(Service_NS,
"Shared Font file missing. Loading open source replacement from memory");
@ -240,8 +265,8 @@ PL_U::PL_U() : ServiceFramework("pl:u") {
for (const std::vector<u8>& font_ttf : open_source_shared_fonts_ttf) {
const FontRegion region{static_cast<u32>(offset + 8),
static_cast<u32>(font_ttf.size())};
EncryptSharedFont(font_ttf, *shared_font, offset);
SHARED_FONT_REGIONS.push_back(region);
EncryptSharedFont(font_ttf, *impl->shared_font, offset);
impl->shared_font_regions.push_back(region);
}
}
}
@ -275,7 +300,7 @@ void PL_U::GetSize(Kernel::HLERequestContext& ctx) {
LOG_DEBUG(Service_NS, "called, font_id={}", font_id);
IPC::ResponseBuilder rb{ctx, 3};
rb.Push(RESULT_SUCCESS);
rb.Push<u32>(GetSharedFontRegion(font_id).size);
rb.Push<u32>(impl->GetSharedFontRegion(font_id).size);
}
void PL_U::GetSharedMemoryAddressOffset(Kernel::HLERequestContext& ctx) {
@ -285,17 +310,18 @@ void PL_U::GetSharedMemoryAddressOffset(Kernel::HLERequestContext& ctx) {
LOG_DEBUG(Service_NS, "called, font_id={}", font_id);
IPC::ResponseBuilder rb{ctx, 3};
rb.Push(RESULT_SUCCESS);
rb.Push<u32>(GetSharedFontRegion(font_id).offset);
rb.Push<u32>(impl->GetSharedFontRegion(font_id).offset);
}
void PL_U::GetSharedMemoryNativeHandle(Kernel::HLERequestContext& ctx) {
// Map backing memory for the font data
Core::CurrentProcess()->vm_manager.MapMemoryBlock(
SHARED_FONT_MEM_VADDR, shared_font, 0, SHARED_FONT_MEM_SIZE, Kernel::MemoryState::Shared);
Core::CurrentProcess()->vm_manager.MapMemoryBlock(SHARED_FONT_MEM_VADDR, impl->shared_font, 0,
SHARED_FONT_MEM_SIZE,
Kernel::MemoryState::Shared);
// Create shared font memory object
auto& kernel = Core::System::GetInstance().Kernel();
shared_font_mem = Kernel::SharedMemory::Create(
impl->shared_font_mem = Kernel::SharedMemory::Create(
kernel, Core::CurrentProcess(), SHARED_FONT_MEM_SIZE, Kernel::MemoryPermission::ReadWrite,
Kernel::MemoryPermission::Read, SHARED_FONT_MEM_VADDR, Kernel::MemoryRegion::BASE,
"PL_U:shared_font_mem");
@ -303,7 +329,7 @@ void PL_U::GetSharedMemoryNativeHandle(Kernel::HLERequestContext& ctx) {
LOG_DEBUG(Service_NS, "called");
IPC::ResponseBuilder rb{ctx, 2, 1};
rb.Push(RESULT_SUCCESS);
rb.PushCopyObjects(shared_font_mem);
rb.PushCopyObjects(impl->shared_font_mem);
}
void PL_U::GetSharedFontInOrderOfPriority(Kernel::HLERequestContext& ctx) {
@ -316,9 +342,9 @@ void PL_U::GetSharedFontInOrderOfPriority(Kernel::HLERequestContext& ctx) {
std::vector<u32> font_sizes;
// TODO(ogniK): Have actual priority order
for (size_t i = 0; i < SHARED_FONT_REGIONS.size(); i++) {
for (size_t i = 0; i < impl->shared_font_regions.size(); i++) {
font_codes.push_back(static_cast<u32>(i));
auto region = GetSharedFontRegion(i);
auto region = impl->GetSharedFontRegion(i);
font_offsets.push_back(region.offset);
font_sizes.push_back(region.size);
}

8
src/core/hle/service/ns/pl_u.h
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@ -5,7 +5,6 @@
#pragma once
#include <memory>
#include "core/hle/kernel/shared_memory.h"
#include "core/hle/service/service.h"
namespace Service::NS {
@ -23,11 +22,8 @@ private:
void GetSharedMemoryNativeHandle(Kernel::HLERequestContext& ctx);
void GetSharedFontInOrderOfPriority(Kernel::HLERequestContext& ctx);
/// Handle to shared memory region designated for a shared font
Kernel::SharedPtr<Kernel::SharedMemory> shared_font_mem;
/// Backing memory for the shared font data
std::shared_ptr<std::vector<u8>> shared_font;
struct Impl;
std::unique_ptr<Impl> impl;
};
} // namespace Service::NS