mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-22 20:06:40 +00:00
kern: implement Svc(Un)MapInsecureMemory
This commit is contained in:
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5a918f3bc9
commit
e7a1e0fee2
8 changed files with 213 additions and 2 deletions
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@ -110,6 +110,14 @@ namespace ams::kern::arch::arm64 {
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R_RETURN(m_page_table.MapRegion(region_type, perm));
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}
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Result MapInsecureMemory(KProcessAddress address, size_t size) {
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R_RETURN(m_page_table.MapInsecureMemory(address, size));
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}
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Result UnmapInsecureMemory(KProcessAddress address, size_t size) {
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R_RETURN(m_page_table.UnmapInsecureMemory(address, size));
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}
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Result MapPageGroup(KProcessAddress addr, const KPageGroup &pg, KMemoryState state, KMemoryPermission perm) {
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R_RETURN(m_page_table.MapPageGroup(addr, pg, state, perm));
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}
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@ -110,6 +110,10 @@ namespace ams::kern {
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KMemoryState_CodeOut = ams::svc::MemoryState_CodeOut | KMemoryState_FlagMapped | KMemoryState_FlagReferenceCounted | KMemoryState_FlagLinearMapped,
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KMemoryState_Coverage = ams::svc::MemoryState_Coverage | KMemoryState_FlagMapped,
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KMemoryState_Insecure = ams::svc::MemoryState_Insecure | KMemoryState_FlagMapped | KMemoryState_FlagReferenceCounted | KMemoryState_FlagLinearMapped | KMemoryState_FlagCanChangeAttribute
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| KMemoryState_FlagCanDeviceMap | KMemoryState_FlagCanAlignedDeviceMap
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| KMemoryState_FlagCanUseNonSecureIpc | KMemoryState_FlagCanUseNonDeviceIpc,
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};
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#if 1
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@ -136,6 +140,7 @@ namespace ams::kern {
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static_assert(KMemoryState_GeneratedCode == 0x04402214);
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static_assert(KMemoryState_CodeOut == 0x04402015);
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static_assert(KMemoryState_Coverage == 0x00002016);
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static_assert(KMemoryState_Insecure == 0x05583817);
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#endif
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enum KMemoryPermission : u8 {
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@ -165,6 +165,7 @@ namespace ams::kern {
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size_t m_max_heap_size;
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size_t m_mapped_physical_memory_size;
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size_t m_mapped_unsafe_physical_memory;
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size_t m_mapped_insecure_memory;
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size_t m_mapped_ipc_server_memory;
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mutable KLightLock m_general_lock;
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mutable KLightLock m_map_physical_memory_lock;
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@ -191,8 +192,8 @@ namespace ams::kern {
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m_alias_region_end(Null<KProcessAddress>), m_stack_region_start(Null<KProcessAddress>), m_stack_region_end(Null<KProcessAddress>),
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m_kernel_map_region_start(Null<KProcessAddress>), m_kernel_map_region_end(Null<KProcessAddress>), m_alias_code_region_start(Null<KProcessAddress>),
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m_alias_code_region_end(Null<KProcessAddress>), m_code_region_start(Null<KProcessAddress>), m_code_region_end(Null<KProcessAddress>),
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m_max_heap_size(), m_mapped_physical_memory_size(), m_mapped_unsafe_physical_memory(), m_mapped_ipc_server_memory(), m_general_lock(),
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m_map_physical_memory_lock(), m_device_map_lock(), m_impl(util::ConstantInitialize), m_memory_block_manager(util::ConstantInitialize),
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m_max_heap_size(), m_mapped_physical_memory_size(), m_mapped_unsafe_physical_memory(), m_mapped_insecure_memory(), m_mapped_ipc_server_memory(),
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m_general_lock(), m_map_physical_memory_lock(), m_device_map_lock(), m_impl(util::ConstantInitialize), m_memory_block_manager(util::ConstantInitialize),
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m_allocate_option(), m_address_space_width(), m_is_kernel(), m_enable_aslr(), m_enable_device_address_space_merge(),
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m_memory_block_slab_manager(), m_block_info_manager(), m_resource_limit(), m_cached_physical_linear_region(), m_cached_physical_heap_region(),
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m_heap_fill_value(), m_ipc_fill_value(), m_stack_fill_value()
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@ -365,6 +366,8 @@ namespace ams::kern {
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Result UnmapIoRegion(KProcessAddress dst_address, KPhysicalAddress phys_addr, size_t size);
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Result MapStatic(KPhysicalAddress phys_addr, size_t size, KMemoryPermission perm);
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Result MapRegion(KMemoryRegionType region_type, KMemoryPermission perm);
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Result MapInsecureMemory(KProcessAddress address, size_t size);
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Result UnmapInsecureMemory(KProcessAddress address, size_t size);
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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) {
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R_RETURN(this->MapPages(out_addr, num_pages, alignment, phys_addr, true, region_start, region_num_pages, state, perm));
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@ -25,6 +25,8 @@ namespace ams::kern {
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namespace ams::kern {
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class KResourceLimit;
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class KSystemControlBase {
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public:
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/* This can be overridden as needed. */
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@ -86,6 +88,10 @@ namespace ams::kern {
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static size_t CalculateRequiredSecureMemorySize(size_t size, u32 pool);
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static Result AllocateSecureMemory(KVirtualAddress *out, size_t size, u32 pool);
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static void FreeSecureMemory(KVirtualAddress address, size_t size, u32 pool);
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/* Insecure Memory. */
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static KResourceLimit *GetInsecureMemoryResourceLimit();
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static u32 GetInsecureMemoryPool();
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protected:
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template<typename F>
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static ALWAYS_INLINE u64 GenerateUniformRange(u64 min, u64 max, F f) {
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@ -103,6 +103,7 @@ namespace ams::kern {
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m_max_heap_size = 0;
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m_mapped_physical_memory_size = 0;
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m_mapped_unsafe_physical_memory = 0;
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m_mapped_insecure_memory = 0;
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m_mapped_ipc_server_memory = 0;
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m_memory_block_slab_manager = Kernel::GetSystemSystemResource().GetMemoryBlockSlabManagerPointer();
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@ -287,6 +288,7 @@ namespace ams::kern {
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m_max_heap_size = 0;
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m_mapped_physical_memory_size = 0;
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m_mapped_unsafe_physical_memory = 0;
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m_mapped_insecure_memory = 0;
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m_mapped_ipc_server_memory = 0;
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const bool fill_memory = KTargetSystem::IsDebugMemoryFillEnabled();
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@ -340,6 +342,13 @@ namespace ams::kern {
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Kernel::GetUnsafeMemory().Release(m_mapped_unsafe_physical_memory);
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}
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/* Release any insecure mapped memory. */
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if (m_mapped_insecure_memory) {
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if (auto * const insecure_resource_limit = KSystemControl::GetInsecureMemoryResourceLimit(); insecure_resource_limit != nullptr) {
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insecure_resource_limit->Release(ams::svc::LimitableResource_PhysicalMemoryMax, m_mapped_insecure_memory);
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}
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}
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/* Release any ipc server memory. */
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if (m_mapped_ipc_server_memory) {
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m_resource_limit->Release(ams::svc::LimitableResource_PhysicalMemoryMax, m_mapped_ipc_server_memory);
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@ -375,6 +384,7 @@ namespace ams::kern {
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case KMemoryState_GeneratedCode:
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case KMemoryState_CodeOut:
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case KMemoryState_Coverage:
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case KMemoryState_Insecure:
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return m_alias_code_region_start;
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case KMemoryState_Code:
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case KMemoryState_CodeData:
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@ -409,6 +419,7 @@ namespace ams::kern {
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case KMemoryState_GeneratedCode:
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case KMemoryState_CodeOut:
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case KMemoryState_Coverage:
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case KMemoryState_Insecure:
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return m_alias_code_region_end - m_alias_code_region_start;
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case KMemoryState_Code:
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case KMemoryState_CodeData:
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@ -446,6 +457,7 @@ namespace ams::kern {
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case KMemoryState_GeneratedCode:
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case KMemoryState_CodeOut:
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case KMemoryState_Coverage:
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case KMemoryState_Insecure:
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return is_in_region && !is_in_heap && !is_in_alias;
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case KMemoryState_Normal:
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MESOSPHERE_ASSERT(is_in_heap);
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@ -1038,6 +1050,97 @@ namespace ams::kern {
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R_SUCCEED();
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}
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Result KPageTableBase::MapInsecureMemory(KProcessAddress address, size_t size) {
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/* Get the insecure memory resource limit and pool. */
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auto * const insecure_resource_limit = KSystemControl::GetInsecureMemoryResourceLimit();
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const auto insecure_pool = static_cast<KMemoryManager::Pool>(KSystemControl::GetInsecureMemoryPool());
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/* Reserve the insecure memory. */
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/* NOTE: ResultOutOfMemory is returned here instead of the usual LimitReached. */
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KScopedResourceReservation memory_reservation(insecure_resource_limit, ams::svc::LimitableResource_PhysicalMemoryMax, size);
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R_UNLESS(memory_reservation.Succeeded(), svc::ResultOutOfMemory());
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/* Allocate pages for the insecure memory. */
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KPageGroup pg(m_block_info_manager);
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R_TRY(Kernel::GetMemoryManager().AllocateAndOpen(std::addressof(pg), size / PageSize, KMemoryManager::EncodeOption(insecure_pool, KMemoryManager::Direction_FromFront)));
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/* Close the opened pages when we're done with them. */
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/* If the mapping succeeds, each page will gain an extra reference, otherwise they will be freed automatically. */
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ON_SCOPE_EXIT { pg.Close(); };
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/* Clear all the newly allocated pages. */
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for (const auto &it : pg) {
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std::memset(GetVoidPointer(GetHeapVirtualAddress(it.GetAddress())), m_heap_fill_value, it.GetSize());
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}
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/* Lock the table. */
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KScopedLightLock lk(m_general_lock);
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/* Validate that the address's state is valid. */
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size_t num_allocator_blocks;
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R_TRY(this->CheckMemoryState(std::addressof(num_allocator_blocks), address, size, KMemoryState_All, KMemoryState_Free, KMemoryPermission_None, KMemoryPermission_None, KMemoryAttribute_None, KMemoryAttribute_None));
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/* Create an update allocator. */
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Result allocator_result;
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KMemoryBlockManagerUpdateAllocator allocator(std::addressof(allocator_result), m_memory_block_slab_manager, num_allocator_blocks);
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R_TRY(allocator_result);
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/* We're going to perform an update, so create a helper. */
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KScopedPageTableUpdater updater(this);
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/* Map the pages. */
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const size_t num_pages = size / PageSize;
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const KPageProperties map_properties = { KMemoryPermission_UserReadWrite, false, false, DisableMergeAttribute_DisableHead };
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R_TRY(this->Operate(updater.GetPageList(), address, num_pages, pg, map_properties, OperationType_MapGroup, false));
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/* Apply the memory block update. */
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m_memory_block_manager.Update(std::addressof(allocator), address, num_pages, KMemoryState_Insecure, KMemoryPermission_UserReadWrite, KMemoryAttribute_None, KMemoryBlockDisableMergeAttribute_Normal, KMemoryBlockDisableMergeAttribute_None);
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/* Update our mapped insecure size. */
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m_mapped_insecure_memory += size;
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/* Commit the memory reservation. */
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memory_reservation.Commit();
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/* We succeeded. */
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R_SUCCEED();
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}
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Result KPageTableBase::UnmapInsecureMemory(KProcessAddress address, size_t size) {
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/* Lock the table. */
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KScopedLightLock lk(m_general_lock);
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/* Check the memory state. */
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size_t num_allocator_blocks;
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R_TRY(this->CheckMemoryState(std::addressof(num_allocator_blocks), address, size, KMemoryState_All, KMemoryState_Insecure, KMemoryPermission_All, KMemoryPermission_UserReadWrite, KMemoryAttribute_All, KMemoryAttribute_None));
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/* Create an update allocator. */
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Result allocator_result;
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KMemoryBlockManagerUpdateAllocator allocator(std::addressof(allocator_result), m_memory_block_slab_manager, num_allocator_blocks);
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R_TRY(allocator_result);
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/* We're going to perform an update, so create a helper. */
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KScopedPageTableUpdater updater(this);
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/* Unmap the memory. */
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const size_t num_pages = size / PageSize;
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const KPageProperties unmap_properties = { KMemoryPermission_None, false, false, DisableMergeAttribute_None };
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R_TRY(this->Operate(updater.GetPageList(), address, num_pages, Null<KPhysicalAddress>, false, unmap_properties, OperationType_Unmap, false));
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/* Apply the memory block update. */
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m_memory_block_manager.Update(std::addressof(allocator), address, num_pages, KMemoryState_Free, KMemoryPermission_None, KMemoryAttribute_None, KMemoryBlockDisableMergeAttribute_None, KMemoryBlockDisableMergeAttribute_Normal);
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/* Update our mapped insecure size. */
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m_mapped_insecure_memory -= size;
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/* Release the insecure memory from the insecure limit. */
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if (auto * const insecure_resource_limit = KSystemControl::GetInsecureMemoryResourceLimit(); insecure_resource_limit != nullptr) {
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insecure_resource_limit->Release(ams::svc::LimitableResource_PhysicalMemoryMax, size);
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}
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R_SUCCEED();
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}
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KProcessAddress KPageTableBase::FindFreeArea(KProcessAddress region_start, size_t region_num_pages, size_t num_pages, size_t alignment, size_t offset, size_t guard_pages) const {
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KProcessAddress address = Null<KProcessAddress>;
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@ -292,4 +292,13 @@ namespace ams::kern {
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Kernel::GetMemoryManager().Close(KPageTable::GetHeapPhysicalAddress(address), size / PageSize);
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}
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/* Insecure Memory. */
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KResourceLimit *KSystemControlBase::GetInsecureMemoryResourceLimit() {
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return std::addressof(Kernel::GetSystemResourceLimit());
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}
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u32 KSystemControlBase::GetInsecureMemoryPool() {
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return KMemoryManager::Pool_SystemNonSecure;
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}
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}
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@ -0,0 +1,76 @@
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/*
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* Copyright (c) Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <mesosphere.hpp>
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namespace ams::kern::svc {
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/* ============================= Common ============================= */
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namespace {
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Result MapInsecureMemory(uintptr_t address, size_t size) {
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/* Validate the address/size. */
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R_UNLESS(util::IsAligned(size, PageSize), svc::ResultInvalidSize());
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R_UNLESS(size > 0, svc::ResultInvalidSize());
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R_UNLESS(util::IsAligned(address, PageSize), svc::ResultInvalidAddress());
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R_UNLESS((address < address + size), svc::ResultInvalidCurrentMemory());
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/* Verify that the mapping is in range. */
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auto &pt = GetCurrentProcess().GetPageTable();
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R_UNLESS(GetCurrentProcess().GetPageTable().CanContain(address, size, KMemoryState_Insecure), svc::ResultInvalidMemoryRegion());
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/* Map the insecure memory. */
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R_RETURN(pt.MapInsecureMemory(address, size));
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}
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Result UnmapInsecureMemory(uintptr_t address, size_t size) {
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/* Validate the address/size. */
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R_UNLESS(util::IsAligned(size, PageSize), svc::ResultInvalidSize());
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R_UNLESS(size > 0, svc::ResultInvalidSize());
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R_UNLESS(util::IsAligned(address, PageSize), svc::ResultInvalidAddress());
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R_UNLESS((address < address + size), svc::ResultInvalidCurrentMemory());
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/* Verify that the mapping is in range. */
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auto &pt = GetCurrentProcess().GetPageTable();
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R_UNLESS(GetCurrentProcess().GetPageTable().CanContain(address, size, KMemoryState_Insecure), svc::ResultInvalidMemoryRegion());
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/* Map the insecure memory. */
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R_RETURN(pt.UnmapInsecureMemory(address, size));
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}
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}
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/* ============================= 64 ABI ============================= */
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Result MapInsecureMemory64(ams::svc::Address address, ams::svc::Size size) {
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R_RETURN(MapInsecureMemory(address, size));
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}
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Result UnmapInsecureMemory64(ams::svc::Address address, ams::svc::Size size) {
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R_RETURN(UnmapInsecureMemory(address, size));
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}
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/* ============================= 64From32 ABI ============================= */
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Result MapInsecureMemory64From32(ams::svc::Address address, ams::svc::Size size) {
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R_RETURN(MapInsecureMemory(address, size));
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}
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Result UnmapInsecureMemory64From32(ams::svc::Address address, ams::svc::Size size) {
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R_RETURN(UnmapInsecureMemory(address, size));
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}
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}
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@ -95,6 +95,7 @@ namespace ams::svc {
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MemoryState_GeneratedCode = 0x14,
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MemoryState_CodeOut = 0x15,
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MemoryState_Coverage = 0x16,
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MemoryState_Insecure = 0x17,
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};
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enum MemoryPermission : u32 {
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