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kern: implement through kip decompression

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This commit is contained in:
Michael Scire 2020-02-17 02:49:21 -08:00
parent cbc73f4407
commit 92521eed2a
12 changed files with 427 additions and 42 deletions
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2
libraries/libmesosphere/include/mesosphere/arch/arm64/kern_cpu.hpp
View file

@ -157,6 +157,8 @@ namespace ams::kern::arch::arm64::cpu {
void FlushEntireDataCacheSharedForInit();
void FlushEntireDataCacheLocalForInit();
void FlushEntireDataCache();
Result InvalidateDataCache(void *addr, size_t size);
Result StoreDataCache(const void *addr, size_t size);
Result FlushDataCache(const void *addr, size_t size);

31
libraries/libmesosphere/include/mesosphere/arch/arm64/kern_k_page_table.hpp
View file

@ -44,7 +44,6 @@ namespace ams::kern::arch::arm64 {
BlockType_Count,
};
static_assert(L3BlockSize == PageSize);
static constexpr size_t ContiguousPageSize = L3ContiguousBlockSize;
@ -79,6 +78,16 @@ namespace ams::kern::arch::arm64 {
MESOSPHERE_UNREACHABLE_DEFAULT_CASE();
}
}
static constexpr size_t GetSmallerAlignment(size_t alignment) {
MESOSPHERE_ASSERT(alignment > L3BlockSize);
return KPageTable::GetBlockSize(static_cast<KPageTable::BlockType>(KPageTable::GetBlockType(alignment) - 1));
}
static constexpr size_t GetLargerAlignment(size_t alignment) {
MESOSPHERE_ASSERT(alignment < L1BlockSize);
return KPageTable::GetBlockSize(static_cast<KPageTable::BlockType>(KPageTable::GetBlockType(alignment) + 1));
}
protected:
virtual Result Operate(PageLinkedList *page_list, KProcessAddress virt_addr, size_t num_pages, KPhysicalAddress phys_addr, bool is_pa_valid, const KPageProperties properties, OperationType operation, bool reuse_ll) override;
virtual Result Operate(PageLinkedList *page_list, KProcessAddress virt_addr, size_t num_pages, const KPageGroup *page_group, const KPageProperties properties, OperationType operation, bool reuse_ll) override;
@ -164,7 +173,25 @@ namespace ams::kern::arch::arm64 {
Result Finalize();
private:
Result Map(KProcessAddress virt_addr, KPhysicalAddress phys_addr, size_t num_pages, PageTableEntry entry_template, PageLinkedList *page_list, bool reuse_ll);
Result Unmap(KProcessAddress virt_addr, size_t num_pages, KPageGroup *pg, PageLinkedList *page_list, bool force, bool reuse_ll);
Result Unmap(KProcessAddress virt_addr, size_t num_pages, PageLinkedList *page_list, bool force, bool reuse_ll);
Result Map(KProcessAddress virt_addr, KPhysicalAddress phys_addr, size_t num_pages, PageTableEntry entry_template, size_t page_size, PageLinkedList *page_list, bool reuse_ll) {
switch (page_size) {
case L1BlockSize:
#ifdef ATMOSPHERE_BOARD_NINTENDO_NX
case L2TegraSmmuBlockSize:
#endif
case L2BlockSize:
case L3BlockSize:
break;
case L2ContiguousBlockSize:
case L3ContiguousBlockSize:
entry_template.SetContiguous(true);
break;
MESOSPHERE_UNREACHABLE_DEFAULT_CASE();
}
return this->Map(virt_addr, phys_addr, num_pages, entry_template, page_list, reuse_ll);
}
Result MapContiguous(KProcessAddress virt_addr, KPhysicalAddress phys_addr, size_t num_pages, PageTableEntry entry_template, PageLinkedList *page_list, bool reuse_ll);

12
libraries/libmesosphere/include/mesosphere/arch/arm64/kern_k_supervisor_page_table.hpp
View file

@ -35,6 +35,18 @@ namespace ams::kern::arch::arm64 {
return this->page_table.MapPages(out_addr, num_pages, alignment, phys_addr, region_start, region_num_pages, state, perm);
}
Result UnmapPages(KProcessAddress address, size_t num_pages, KMemoryState state) {
return this->page_table.UnmapPages(address, num_pages, state);
}
Result MapPageGroup(KProcessAddress *out_addr, const KPageGroup &pg, KProcessAddress region_start, size_t region_num_pages, KMemoryState state, KMemoryPermission perm) {
return this->page_table.MapPageGroup(out_addr, pg, region_start, region_num_pages, state, perm);
}
Result UnmapPageGroup(KProcessAddress address, const KPageGroup &pg, KMemoryState state) {
return this->page_table.UnmapPageGroup(address, pg, state);
}
bool GetPhysicalAddress(KPhysicalAddress *out, KProcessAddress address) const {
return this->page_table.GetPhysicalAddress(out, address);
}

1
libraries/libmesosphere/include/mesosphere/kern_k_initial_process_reader.hpp
View file

@ -127,6 +127,7 @@ namespace ams::kern {
}
Result MakeCreateProcessParameter(ams::svc::CreateProcessParameter *out, bool enable_aslr) const;
Result Load(KProcessAddress address, const ams::svc::CreateProcessParameter &params) const;
};
}

87
libraries/libmesosphere/include/mesosphere/kern_k_memory_layout.hpp
View file

@ -180,7 +180,7 @@ namespace ams::kern {
}
constexpr ALWAYS_INLINE bool Contains(uintptr_t address) const {
return this->GetAddress() <= address && address < this->GetLastAddress();
return this->GetAddress() <= address && address <= this->GetLastAddress();
}
constexpr ALWAYS_INLINE bool IsDerivedFrom(u32 type) const {
@ -231,6 +231,7 @@ namespace ams::kern {
};
private:
using TreeType = util::IntrusiveRedBlackTreeBaseTraits<KMemoryRegion>::TreeType<KMemoryRegion>;
public:
using value_type = TreeType::value_type;
using size_type = TreeType::size_type;
using difference_type = TreeType::difference_type;
@ -276,7 +277,7 @@ namespace ams::kern {
MESOSPHERE_INIT_ABORT();
}
DerivedRegionExtents GetDerivedRegionExtents(u32 type_id) {
DerivedRegionExtents GetDerivedRegionExtents(u32 type_id) const {
DerivedRegionExtents extents;
MESOSPHERE_INIT_ABORT_UNLESS(extents.first_region == nullptr);
@ -479,12 +480,24 @@ namespace ams::kern {
return *GetVirtualMemoryRegionTree().FindFirstRegionByType(KMemoryRegionType_KernelStack);
}
static NOINLINE KMemoryRegion &GetTempRegion() {
return *GetVirtualMemoryRegionTree().FindFirstRegionByType(KMemoryRegionType_KernelTemp);
}
static NOINLINE KMemoryRegion &GetVirtualLinearRegion(KVirtualAddress address) {
return *GetVirtualLinearMemoryRegionTree().FindContainingRegion(GetInteger(address));
}
static NOINLINE bool IsHeapPhysicalAddress(KMemoryRegion **out, KPhysicalAddress address) {
if (auto it = GetPhysicalLinearMemoryRegionTree().FindContainingRegion(GetInteger(address)); it != GetPhysicalLinearMemoryRegionTree().end() && it->IsDerivedFrom(KMemoryRegionType_DramNonKernel)) {
static NOINLINE bool IsHeapPhysicalAddress(const KMemoryRegion **out, KPhysicalAddress address, const KMemoryRegion *hint = nullptr) {
auto &tree = GetPhysicalLinearMemoryRegionTree();
KMemoryRegionTree::const_iterator it = tree.end();
if (hint != nullptr) {
it = tree.iterator_to(*hint);
}
if (it == tree.end() || !it->Contains(GetInteger(address))) {
it = tree.FindContainingRegion(GetInteger(address));
}
if (it != tree.end() && it->IsDerivedFrom(KMemoryRegionType_DramNonKernel)) {
if (out) {
*out = std::addressof(*it);
}
@ -493,6 +506,72 @@ namespace ams::kern {
return false;
}
static NOINLINE bool IsHeapPhysicalAddress(const KMemoryRegion **out, KPhysicalAddress address, size_t size, const KMemoryRegion *hint = nullptr) {
auto &tree = GetPhysicalLinearMemoryRegionTree();
KMemoryRegionTree::const_iterator it = tree.end();
if (hint != nullptr) {
it = tree.iterator_to(*hint);
}
if (it == tree.end() || !it->Contains(GetInteger(address))) {
it = tree.FindContainingRegion(GetInteger(address));
}
if (it != tree.end() && it->IsDerivedFrom(KMemoryRegionType_DramNonKernel)) {
const uintptr_t last_address = GetInteger(address) + size - 1;
do {
if (last_address <= it->GetLastAddress()) {
if (out) {
*out = std::addressof(*it);
}
return true;
}
it++;
} while (it != tree.end() && it->IsDerivedFrom(KMemoryRegionType_DramNonKernel));
}
return false;
}
static NOINLINE bool IsHeapVirtualAddress(const KMemoryRegion **out, KVirtualAddress address, const KMemoryRegion *hint = nullptr) {
auto &tree = GetVirtualLinearMemoryRegionTree();
KMemoryRegionTree::const_iterator it = tree.end();
if (hint != nullptr) {
it = tree.iterator_to(*hint);
}
if (it == tree.end() || !it->Contains(GetInteger(address))) {
it = tree.FindContainingRegion(GetInteger(address));
}
if (it != tree.end() && it->IsDerivedFrom(KMemoryRegionType_VirtualDramManagedPool)) {
if (out) {
*out = std::addressof(*it);
}
return true;
}
return false;
}
static NOINLINE bool IsHeapVirtualAddress(const KMemoryRegion **out, KVirtualAddress address, size_t size, const KMemoryRegion *hint = nullptr) {
auto &tree = GetVirtualLinearMemoryRegionTree();
KMemoryRegionTree::const_iterator it = tree.end();
if (hint != nullptr) {
it = tree.iterator_to(*hint);
}
if (it == tree.end() || !it->Contains(GetInteger(address))) {
it = tree.FindContainingRegion(GetInteger(address));
}
if (it != tree.end() && it->IsDerivedFrom(KMemoryRegionType_VirtualDramManagedPool)) {
const uintptr_t last_address = GetInteger(address) + size - 1;
do {
if (last_address <= it->GetLastAddress()) {
if (out) {
*out = std::addressof(*it);
}
return true;
}
it++;
} while (it != tree.end() && it->IsDerivedFrom(KMemoryRegionType_VirtualDramManagedPool));
}
return false;
}
static NOINLINE std::tuple<size_t, size_t> GetTotalAndKernelMemorySizes() {
size_t total_size = 0, kernel_size = 0;
for (auto it = GetPhysicalMemoryRegionTree().cbegin(); it != GetPhysicalMemoryRegionTree().cend(); it++) {

1
libraries/libmesosphere/include/mesosphere/kern_k_page_group.hpp
View file

@ -38,6 +38,7 @@ namespace ams::kern {
constexpr size_t GetNumPages() const { return this->num_pages; }
constexpr size_t GetSize() const { return this->GetNumPages() * PageSize; }
constexpr KVirtualAddress GetEndAddress() const { return this->GetAddress() + this->GetSize(); }
constexpr KVirtualAddress GetLastAddress() const { return this->GetEndAddress() - 1; }
constexpr bool IsEquivalentTo(const KBlockInfo &rhs) const {
return this->address == rhs.address && this->num_pages == rhs.num_pages;

36
libraries/libmesosphere/include/mesosphere/kern_k_page_table_base.hpp
View file

@ -124,9 +124,9 @@ namespace ams::kern {
bool enable_aslr;
KMemoryBlockSlabManager *memory_block_slab_manager;
KBlockInfoManager *block_info_manager;
KMemoryRegion *cached_physical_linear_region;
KMemoryRegion *cached_physical_heap_region;
KMemoryRegion *cached_virtual_managed_pool_dram_region;
const KMemoryRegion *cached_physical_linear_region;
const KMemoryRegion *cached_physical_heap_region;
const KMemoryRegion *cached_virtual_heap_region;
MemoryFillValue heap_fill_value;
MemoryFillValue ipc_fill_value;
MemoryFillValue stack_fill_value;
@ -137,7 +137,7 @@ namespace ams::kern {
kernel_map_region_end(), alias_code_region_start(), alias_code_region_end(), code_region_start(), code_region_end(),
max_heap_size(), max_physical_memory_size(), general_lock(), map_physical_memory_lock(), impl(), memory_block_manager(),
allocate_option(), address_space_size(), is_kernel(), enable_aslr(), memory_block_slab_manager(), block_info_manager(),
cached_physical_linear_region(), cached_physical_heap_region(), cached_virtual_managed_pool_dram_region(),
cached_physical_linear_region(), cached_physical_heap_region(), cached_virtual_heap_region(),
heap_fill_value(), ipc_fill_value(), stack_fill_value()
{
/* ... */
@ -172,10 +172,27 @@ namespace ams::kern {
bool IsLockedByCurrentThread() const { return this->general_lock.IsLockedByCurrentThread(); }
bool IsHeapPhysicalAddress(KPhysicalAddress phys_addr) {
if (this->cached_physical_heap_region && this->cached_physical_heap_region->Contains(GetInteger(phys_addr))) {
return true;
MESOSPHERE_ASSERT(this->IsLockedByCurrentThread());
return KMemoryLayout::IsHeapPhysicalAddress(std::addressof(this->cached_physical_heap_region), phys_addr, this->cached_physical_heap_region);
}
return KMemoryLayout::IsHeapPhysicalAddress(&this->cached_physical_heap_region, phys_addr);
bool IsHeapPhysicalAddress(KPhysicalAddress phys_addr, size_t size) {
MESOSPHERE_ASSERT(this->IsLockedByCurrentThread());
return KMemoryLayout::IsHeapPhysicalAddress(std::addressof(this->cached_physical_heap_region), phys_addr, size, this->cached_physical_heap_region);
}
bool IsHeapVirtualAddress(KVirtualAddress virt_addr) {
MESOSPHERE_ASSERT(this->IsLockedByCurrentThread());
return KMemoryLayout::IsHeapVirtualAddress(std::addressof(this->cached_virtual_heap_region), virt_addr, this->cached_virtual_heap_region);
}
bool IsHeapVirtualAddress(KVirtualAddress virt_addr, size_t size) {
MESOSPHERE_ASSERT(this->IsLockedByCurrentThread());
return KMemoryLayout::IsHeapVirtualAddress(std::addressof(this->cached_virtual_heap_region), virt_addr, size, this->cached_virtual_heap_region);
}
bool ContainsPages(KProcessAddress addr, size_t num_pages) const {
@ -193,6 +210,7 @@ namespace ams::kern {
Result QueryInfoImpl(KMemoryInfo *out_info, ams::svc::PageInfo *out_page, KProcessAddress address) const;
Result AllocateAndMapPagesImpl(PageLinkedList *page_list, KProcessAddress address, size_t num_pages, const KPageProperties properties);
Result MapPageGroupImpl(PageLinkedList *page_list, KProcessAddress address, const KPageGroup &pg, const KPageProperties properties, bool reuse_ll);
NOINLINE Result MapPages(KProcessAddress *out_addr, size_t num_pages, size_t alignment, KPhysicalAddress phys_addr, bool is_pa_valid, KProcessAddress region_start, size_t region_num_pages, KMemoryState state, KMemoryPermission perm);
public:
@ -203,6 +221,10 @@ namespace ams::kern {
Result MapPages(KProcessAddress *out_addr, size_t num_pages, size_t alignment, KPhysicalAddress phys_addr, KProcessAddress region_start, size_t region_num_pages, KMemoryState state, KMemoryPermission perm) {
return this->MapPages(out_addr, num_pages, alignment, phys_addr, true, region_start, region_num_pages, state, perm);
}
Result UnmapPages(KProcessAddress address, size_t num_pages, KMemoryState state);
Result MapPageGroup(KProcessAddress *out_addr, const KPageGroup &pg, KProcessAddress region_start, size_t region_num_pages, KMemoryState state, KMemoryPermission perm);
Result UnmapPageGroup(KProcessAddress address, const KPageGroup &pg, KMemoryState state);
public:
static ALWAYS_INLINE KVirtualAddress GetLinearVirtualAddress(KPhysicalAddress addr) {
return KMemoryLayout::GetLinearVirtualAddress(addr);

4
libraries/libmesosphere/source/arch/arm64/kern_cpu.cpp
View file

@ -333,6 +333,10 @@ namespace ams::kern::arch::arm64::cpu {
return PerformCacheOperationBySetWayLocal<true>(FlushDataCacheLineBySetWayImpl);
}
void FlushEntireDataCache() {
return PerformCacheOperationBySetWayShared<false>(FlushDataCacheLineBySetWayImpl);
}
Result InvalidateDataCache(void *addr, size_t size) {
KScopedCoreMigrationDisable dm;
const uintptr_t start = reinterpret_cast<uintptr_t>(addr);

58
libraries/libmesosphere/source/arch/arm64/kern_k_page_table.cpp
View file

@ -58,7 +58,7 @@ namespace ams::kern::arch::arm64 {
}
if (operation == OperationType_Unmap) {
MESOSPHERE_TODO("operation == OperationType_Unmap");
return this->Unmap(virt_addr, num_pages, page_list, false, reuse_ll);
} else {
auto entry_template = this->GetEntryTemplate(properties);
@ -175,7 +175,7 @@ namespace ams::kern::arch::arm64 {
return ResultSuccess();
}
Result KPageTable::Unmap(KProcessAddress virt_addr, size_t num_pages, KPageGroup *pg, PageLinkedList *page_list, bool force, bool reuse_ll) {
Result KPageTable::Unmap(KProcessAddress virt_addr, size_t num_pages, PageLinkedList *page_list, bool force, bool reuse_ll) {
MESOSPHERE_TODO_IMPLEMENT();
}
@ -188,13 +188,57 @@ namespace ams::kern::arch::arm64 {
size_t remaining_pages = num_pages;
/* Map the pages, using a guard to ensure we don't leak. */
{
auto map_guard = SCOPE_GUARD { MESOSPHERE_R_ABORT_UNLESS(this->Unmap(orig_virt_addr, num_pages, nullptr, page_list, true, true)); };
if (num_pages < ContiguousPageSize / PageSize) {
auto guard = SCOPE_GUARD { MESOSPHERE_R_ABORT_UNLESS(this->Unmap(orig_virt_addr, num_pages, nullptr, page_list, true, true)); };
R_TRY(this->Map(virt_addr, phys_addr, num_pages, entry_template, page_list, reuse_ll));
guard.Cancel();
R_TRY(this->Map(virt_addr, phys_addr, num_pages, entry_template, L3BlockSize, page_list, reuse_ll));
remaining_pages -= num_pages;
virt_addr += num_pages * PageSize;
phys_addr += num_pages * PageSize;
} else {
MESOSPHERE_TODO("Contiguous mapping");
(void)remaining_pages;
/* Map the fractional part of the pages. */
size_t alignment;
for (alignment = ContiguousPageSize; (virt_addr & (alignment - 1)) == (phys_addr & (alignment - 1)); alignment = GetLargerAlignment(alignment)) {
/* Check if this would be our last map. */
const size_t pages_to_map = (alignment - (virt_addr & (alignment - 1))) & (alignment - 1);
if (pages_to_map + (alignment / PageSize) > remaining_pages) {
break;
}
/* Map pages, if we should. */
if (pages_to_map > 0) {
R_TRY(this->Map(virt_addr, phys_addr, pages_to_map, entry_template, GetSmallerAlignment(alignment), page_list, reuse_ll));
remaining_pages -= pages_to_map;
virt_addr += pages_to_map * PageSize;
phys_addr += pages_to_map * PageSize;
}
/* Don't go further than L1 block. */
if (alignment == L1BlockSize) {
break;
}
}
while (remaining_pages > 0) {
/* Select the next smallest alignment. */
alignment = GetSmallerAlignment(alignment);
MESOSPHERE_ASSERT((virt_addr & (alignment - 1)) == 0);
MESOSPHERE_ASSERT((phys_addr & (alignment - 1)) == 0);
/* Map pages, if we should. */
const size_t pages_to_map = util::AlignDown(remaining_pages, alignment / PageSize);
if (pages_to_map > 0) {
R_TRY(this->Map(virt_addr, phys_addr, pages_to_map, entry_template, alignment, page_list, reuse_ll));
remaining_pages -= pages_to_map;
virt_addr += pages_to_map * PageSize;
phys_addr += pages_to_map * PageSize;
}
}
}
map_guard.Cancel();
}
/* Perform what coalescing we can. */

28
libraries/libmesosphere/source/kern_initial_process.cpp
View file

@ -52,21 +52,34 @@ namespace ams::kern {
/* Parse process parameters and reserve memory. */
ams::svc::CreateProcessParameter params;
MESOSPHERE_R_ABORT_UNLESS(reader.MakeCreateProcessParameter(std::addressof(params), true));
MESOSPHERE_TODO("Reserve memory");
MESOSPHERE_LOG("Reserving %zx for process %zu\n", params.code_num_pages * PageSize, i);
MESOSPHERE_ABORT_UNLESS(Kernel::GetSystemResourceLimit().Reserve(ams::svc::LimitableResource_PhysicalMemoryMax, params.code_num_pages * PageSize));
/* Create the process, and ensure we don't leak pages. */
/* Create the process. */
KProcess *new_process = nullptr;
{
/* Declare page group to use for process memory. */
KPageGroup pg(std::addressof(Kernel::GetBlockInfoManager()));
/* Allocate memory for the process. */
MESOSPHERE_TODO("Allocate memory for the process");
auto &mm = Kernel::GetMemoryManager();
const auto pool = static_cast<KMemoryManager::Pool>(reader.UsesSecureMemory() ? KMemoryManager::Pool_System : KSystemControl::GetInitialProcessBinaryPool());
MESOSPHERE_R_ABORT_UNLESS(mm.Allocate(std::addressof(pg), params.code_num_pages, KMemoryManager::EncodeOption(pool, KMemoryManager::Direction_FromFront)));
{
/* Ensure that we do not leak pages. */
KScopedPageGroup spg(pg);
/* Map the process's memory into the temporary region. */
MESOSPHERE_TODO("Map the process's page group");
const auto &temp_region = KMemoryLayout::GetTempRegion();
KProcessAddress temp_address = Null<KProcessAddress>;
MESOSPHERE_R_ABORT_UNLESS(Kernel::GetKernelPageTable().MapPageGroup(std::addressof(temp_address), pg, temp_region.GetAddress(), temp_region.GetSize() / PageSize, KMemoryState_Kernel, KMemoryPermission_KernelReadWrite));
/* Load the process. */
MESOSPHERE_TODO("Load the process");
MESOSPHERE_R_ABORT_UNLESS(reader.Load(temp_address, params));
/* Unmap the temporary mapping. */
MESOSPHERE_TODO("Unmap the process's page group");
MESOSPHERE_R_ABORT_UNLESS(Kernel::GetKernelPageTable().UnmapPageGroup(temp_address, pg, KMemoryState_Kernel));
/* Create a KProcess object. */
MESOSPHERE_TODO("Create a KProcess");
@ -74,6 +87,7 @@ namespace ams::kern {
/* Initialize the process. */
MESOSPHERE_TODO("Initialize the process");
}
}
/* Set the process's memory permissions. */
MESOSPHERE_TODO("Set process's memory permissions");
@ -82,7 +96,7 @@ namespace ams::kern {
MESOSPHERE_TODO("Register the process");
/* Save the process info. */
infos[i].process = /* TODO */ nullptr;
infos[i].process = new_process;
infos[i].stack_size = reader.GetStackSize();
infos[i].priority = reader.GetPriority();

104
libraries/libmesosphere/source/kern_k_initial_process_reader.cpp
View file

@ -17,6 +17,63 @@
namespace ams::kern {
namespace {
struct BlzSegmentFlags {
using Offset = util::BitPack16::Field<0, 12, u32>;
using Size = util::BitPack16::Field<Offset::Next, 4, u32>;
};
NOINLINE void BlzUncompress(void *_end) {
/* Parse the footer, endian agnostic. */
static_assert(sizeof(u32) == 4);
static_assert(sizeof(u16) == 2);
static_assert(sizeof(u8) == 1);
u8 *end = static_cast<u8 *>(_end);
const u32 total_size = (end[-12] << 0) | (end[-11] << 8) | (end[-10] << 16) | (end[- 9] << 24);
const u32 footer_size = (end[- 8] << 0) | (end[- 7] << 8) | (end[- 6] << 16) | (end[- 5] << 24);
const u32 additional_size = (end[- 4] << 0) | (end[- 3] << 8) | (end[- 2] << 16) | (end[- 1] << 24);
/* Prepare to decompress. */
u8 *cmp_start = end - total_size;
u32 cmp_ofs = total_size - footer_size;
u32 out_ofs = total_size + additional_size;
/* Decompress. */
while (out_ofs) {
u8 control = cmp_start[--cmp_ofs];
/* Each bit in the control byte is a flag indicating compressed or not compressed. */
for (size_t i = 0; i < 8 && out_ofs; ++i, control <<= 1) {
if (control & 0x80) {
/* NOTE: Nintendo does not check if it's possible to decompress. */
/* As such, we will leave the following as a debug assertion, and not a release assertion. */
MESOSPHERE_ASSERT(cmp_ofs >= sizeof(u16));
cmp_ofs -= sizeof(u16);
/* Extract segment bounds. */
const util::BitPack16 seg_flags{static_cast<u16>((cmp_start[cmp_ofs] << 0) | (cmp_start[cmp_ofs + 1] << 8))};
const u32 seg_ofs = seg_flags.Get<BlzSegmentFlags::Offset>() + 3;
const u32 seg_size = std::min(seg_flags.Get<BlzSegmentFlags::Size>(), out_ofs) + 3;
/* Copy the data. */
out_ofs -= seg_size;
for (size_t j = 0; j < seg_size; j++) {
cmp_start[out_ofs + j] = cmp_start[out_ofs + seg_ofs + j];
}
} else {
/* NOTE: Nintendo does not check if it's possible to copy. */
/* As such, we will leave the following as a debug assertion, and not a release assertion. */
MESOSPHERE_ASSERT(cmp_ofs >= sizeof(u8));
cmp_start[--out_ofs] = cmp_start[--cmp_ofs];
}
}
}
}
}
Result KInitialProcessReader::MakeCreateProcessParameter(ams::svc::CreateProcessParameter *out, bool enable_aslr) const {
/* Get and validate addresses/sizes. */
const uintptr_t rx_address = this->kip_header->GetRxAddress();
@ -56,7 +113,7 @@ namespace ams::kern {
/* Set fields in parameter. */
out->code_address = map_start + start_address;
out->code_num_pages = util::AlignUp(end_address - start_address, PageSize);
out->code_num_pages = util::AlignUp(end_address - start_address, PageSize) / PageSize;
out->program_id = this->kip_header->GetProgramId();
out->version = this->kip_header->GetVersion();
out->flags = 0;
@ -85,4 +142,49 @@ namespace ams::kern {
return ResultSuccess();
}
Result KInitialProcessReader::Load(KProcessAddress address, const ams::svc::CreateProcessParameter &params) const {
/* Clear memory at the address. */
std::memset(GetVoidPointer(address), 0, params.code_num_pages);
/* Prepare to layout the data. */
const KProcessAddress rx_address = address + this->kip_header->GetRxAddress();
const KProcessAddress ro_address = address + this->kip_header->GetRoAddress();
const KProcessAddress rw_address = address + this->kip_header->GetRwAddress();
const u8 *rx_binary = reinterpret_cast<const u8 *>(this->kip_header + 1);
const u8 *ro_binary = rx_binary + this->kip_header->GetRxCompressedSize();
const u8 *rw_binary = ro_binary + this->kip_header->GetRoCompressedSize();
/* Copy text. */
if (util::AlignUp(this->kip_header->GetRxSize(), PageSize)) {
std::memcpy(GetVoidPointer(rx_address), rx_binary, this->kip_header->GetRxCompressedSize());
if (this->kip_header->IsRxCompressed()) {
BlzUncompress(GetVoidPointer(rx_address + this->kip_header->GetRxCompressedSize()));
}
}
/* Copy rodata. */
if (util::AlignUp(this->kip_header->GetRoSize(), PageSize)) {
std::memcpy(GetVoidPointer(ro_address), ro_binary, this->kip_header->GetRoCompressedSize());
if (this->kip_header->IsRoCompressed()) {
BlzUncompress(GetVoidPointer(ro_address + this->kip_header->GetRoCompressedSize()));
}
}
/* Copy rwdata. */
if (util::AlignUp(this->kip_header->GetRwSize(), PageSize)) {
std::memcpy(GetVoidPointer(rw_address), rw_binary, this->kip_header->GetRwCompressedSize());
if (this->kip_header->IsRwCompressed()) {
BlzUncompress(GetVoidPointer(rw_address + this->kip_header->GetRwCompressedSize()));
}
}
/* Flush caches. */
/* NOTE: official kernel does an entire cache flush by set/way here, which is incorrect as other cores are online. */
/* We will simply flush by virtual address, since that's what ARM says is correct to do. */
MESOSPHERE_R_ABORT_UNLESS(cpu::FlushDataCache(GetVoidPointer(address), params.code_num_pages * PageSize));
cpu::InvalidateEntireInstructionCache();
return ResultSuccess();
}
}

81
libraries/libmesosphere/source/kern_k_page_table_base.cpp
View file

@ -52,7 +52,7 @@ namespace ams::kern {
this->cached_physical_linear_region = nullptr;
this->cached_physical_heap_region = nullptr;
this->cached_virtual_managed_pool_dram_region = nullptr;
this->cached_virtual_heap_region = nullptr;
/* Initialize our implementation. */
this->impl.InitializeForKernel(table, start, end);
@ -285,6 +285,8 @@ namespace ams::kern {
}
Result KPageTableBase::AllocateAndMapPagesImpl(PageLinkedList *page_list, KProcessAddress address, size_t num_pages, const KPageProperties properties) {
MESOSPHERE_ASSERT(this->IsLockedByCurrentThread());
/* Create a page group to hold the pages we allocate. */
KPageGroup pg(this->block_info_manager);
@ -303,6 +305,38 @@ namespace ams::kern {
return this->Operate(page_list, address, num_pages, std::addressof(pg), properties, OperationType_MapGroup, false);
}
Result KPageTableBase::MapPageGroupImpl(PageLinkedList *page_list, KProcessAddress address, const KPageGroup &pg, const KPageProperties properties, bool reuse_ll) {
MESOSPHERE_ASSERT(this->IsLockedByCurrentThread());
/* Note the current address, so that we can iterate. */
const KProcessAddress start_address = address;
KProcessAddress cur_address = address;
/* Ensure that we clean up on failure. */
auto mapping_guard = SCOPE_GUARD {
MESOSPHERE_ABORT_UNLESS(!reuse_ll);
if (cur_address != start_address) {
const KPageProperties unmap_properties = {};
MESOSPHERE_R_ABORT_UNLESS(this->Operate(page_list, start_address, (cur_address - start_address) / PageSize, Null<KPhysicalAddress>, false, unmap_properties, OperationType_Unmap, true));
}
};
/* Iterate, mapping all pages in the group. */
for (const auto &block : pg) {
/* We only allow mapping pages in the heap, and we require we're mapping non-empty blocks. */
MESOSPHERE_ABORT_UNLESS(block.GetAddress() < block.GetLastAddress());
MESOSPHERE_ABORT_UNLESS(IsHeapVirtualAddress(block.GetAddress(), block.GetSize()));
/* Map and advance. */
R_TRY(this->Operate(page_list, cur_address, block.GetNumPages(), GetHeapPhysicalAddress(block.GetAddress()), true, properties, OperationType_Map, reuse_ll));
cur_address += block.GetSize();
}
/* We succeeded! */
mapping_guard.Cancel();
return ResultSuccess();
}
Result KPageTableBase::MapPages(KProcessAddress *out_addr, size_t num_pages, size_t alignment, KPhysicalAddress phys_addr, bool is_pa_valid, KProcessAddress region_start, size_t region_num_pages, KMemoryState state, KMemoryPermission perm) {
MESOSPHERE_ASSERT(util::IsAligned(alignment, PageSize) && alignment >= PageSize);
@ -318,7 +352,7 @@ namespace ams::kern {
R_UNLESS(addr != Null<KProcessAddress>, svc::ResultOutOfMemory());
MESOSPHERE_ASSERT(util::IsAligned(GetInteger(addr), alignment));
MESOSPHERE_ASSERT(this->Contains(addr, num_pages * PageSize, state));
MESOSPHERE_R_ASSERT(this->CheckMemoryState(addr, num_pages * PageSize, KMemoryState_All, KMemoryState_Free, KMemoryPermission_All, KMemoryPermission_None, KMemoryAttribute_All, KMemoryAttribute_None));
MESOSPHERE_R_ASSERT(this->CheckMemoryState(addr, num_pages * PageSize, KMemoryState_All, KMemoryState_Free, KMemoryPermission_None, KMemoryPermission_None, KMemoryAttribute_None, KMemoryAttribute_None));
/* Create an update allocator. */
KMemoryBlockManagerUpdateAllocator allocator(this->memory_block_slab_manager);
@ -342,4 +376,47 @@ namespace ams::kern {
*out_addr = addr;
return ResultSuccess();
}
Result KPageTableBase::UnmapPages(KProcessAddress address, size_t num_pages, KMemoryState state) {
MESOSPHERE_TODO_IMPLEMENT();
}
Result KPageTableBase::MapPageGroup(KProcessAddress *out_addr, const KPageGroup &pg, KProcessAddress region_start, size_t region_num_pages, KMemoryState state, KMemoryPermission perm) {
/* Ensure this is a valid map request. */
const size_t num_pages = pg.GetNumPages();
R_UNLESS(this->Contains(region_start, region_num_pages * PageSize, state), svc::ResultInvalidCurrentMemory());
R_UNLESS(num_pages < region_num_pages, svc::ResultOutOfMemory());
/* Lock the table. */
KScopedLightLock lk(this->general_lock);
/* Find a random address to map at. */
KProcessAddress addr = this->FindFreeArea(region_start, region_num_pages, num_pages, PageSize, 0, this->GetNumGuardPages());
R_UNLESS(addr != Null<KProcessAddress>, svc::ResultOutOfMemory());
MESOSPHERE_ASSERT(this->Contains(addr, num_pages * PageSize, state));
MESOSPHERE_R_ASSERT(this->CheckMemoryState(addr, num_pages * PageSize, KMemoryState_All, KMemoryState_Free, KMemoryPermission_None, KMemoryPermission_None, KMemoryAttribute_None, KMemoryAttribute_None));
/* Create an update allocator. */
KMemoryBlockManagerUpdateAllocator allocator(this->memory_block_slab_manager);
R_TRY(allocator.GetResult());
/* We're going to perform an update, so create a helper. */
KScopedPageTableUpdater updater(this);
/* Perform mapping operation. */
const KPageProperties properties = { perm, state == KMemoryState_Io, false, false };
R_TRY(this->MapPageGroupImpl(updater.GetPageList(), addr, pg, properties, false));
/* Update the blocks. */
this->memory_block_manager.Update(&allocator, addr, num_pages, state, perm, KMemoryAttribute_None);
/* We successfully mapped the pages. */
*out_addr = addr;
return ResultSuccess();
}
Result KPageTableBase::UnmapPageGroup(KProcessAddress address, const KPageGroup &pg, KMemoryState state) {
MESOSPHERE_TODO_IMPLEMENT();
}
}