From 281437c811847adbc38b69ef3638996c666f65c3 Mon Sep 17 00:00:00 2001 From: Morph <39850852+Morph1984@users.noreply.github.com> Date: Sat, 20 Nov 2021 20:05:02 -0500 Subject: [PATCH 1/3] kernel: KPageTable: Rename SetCodeMemoryPermission to SetProcessMemoryPermission --- src/core/hle/kernel/k_page_table.cpp | 4 ++-- src/core/hle/kernel/k_page_table.h | 2 +- src/core/hle/kernel/k_process.cpp | 2 +- src/core/hle/service/ldr/ldr.cpp | 8 ++++---- 4 files changed, 8 insertions(+), 8 deletions(-) diff --git a/src/core/hle/kernel/k_page_table.cpp b/src/core/hle/kernel/k_page_table.cpp index 526b87241..9bda5c5b2 100644 --- a/src/core/hle/kernel/k_page_table.cpp +++ b/src/core/hle/kernel/k_page_table.cpp @@ -685,8 +685,8 @@ ResultCode KPageTable::UnmapPages(VAddr addr, KPageLinkedList& page_linked_list, return ResultSuccess; } -ResultCode KPageTable::SetCodeMemoryPermission(VAddr addr, std::size_t size, - KMemoryPermission perm) { +ResultCode KPageTable::SetProcessMemoryPermission(VAddr addr, std::size_t size, + KMemoryPermission perm) { std::lock_guard lock{page_table_lock}; diff --git a/src/core/hle/kernel/k_page_table.h b/src/core/hle/kernel/k_page_table.h index 770c4841c..b7ec38f06 100644 --- a/src/core/hle/kernel/k_page_table.h +++ b/src/core/hle/kernel/k_page_table.h @@ -41,7 +41,7 @@ public: ResultCode MapPages(VAddr addr, KPageLinkedList& page_linked_list, KMemoryState state, KMemoryPermission perm); ResultCode UnmapPages(VAddr addr, KPageLinkedList& page_linked_list, KMemoryState state); - ResultCode SetCodeMemoryPermission(VAddr addr, std::size_t size, KMemoryPermission perm); + ResultCode SetProcessMemoryPermission(VAddr addr, std::size_t size, KMemoryPermission perm); KMemoryInfo QueryInfo(VAddr addr); ResultCode ReserveTransferMemory(VAddr addr, std::size_t size, KMemoryPermission perm); ResultCode ResetTransferMemory(VAddr addr, std::size_t size); diff --git a/src/core/hle/kernel/k_process.cpp b/src/core/hle/kernel/k_process.cpp index 76fd8c285..1aad061e1 100644 --- a/src/core/hle/kernel/k_process.cpp +++ b/src/core/hle/kernel/k_process.cpp @@ -528,7 +528,7 @@ void KProcess::LoadModule(CodeSet code_set, VAddr base_addr) { std::lock_guard lock{HLE::g_hle_lock}; const auto ReprotectSegment = [&](const CodeSet::Segment& segment, KMemoryPermission permission) { - page_table->SetCodeMemoryPermission(segment.addr + base_addr, segment.size, permission); + page_table->SetProcessMemoryPermission(segment.addr + base_addr, segment.size, permission); }; kernel.System().Memory().WriteBlock(*this, base_addr, code_set.memory.data(), diff --git a/src/core/hle/service/ldr/ldr.cpp b/src/core/hle/service/ldr/ldr.cpp index 32eff3b2a..3782703d2 100644 --- a/src/core/hle/service/ldr/ldr.cpp +++ b/src/core/hle/service/ldr/ldr.cpp @@ -396,12 +396,12 @@ public: CopyCode(nro_addr + nro_header.segment_headers[DATA_INDEX].memory_offset, data_start, nro_header.segment_headers[DATA_INDEX].memory_size); - CASCADE_CODE(process->PageTable().SetCodeMemoryPermission( + CASCADE_CODE(process->PageTable().SetProcessMemoryPermission( text_start, ro_start - text_start, Kernel::KMemoryPermission::ReadAndExecute)); - CASCADE_CODE(process->PageTable().SetCodeMemoryPermission(ro_start, data_start - ro_start, - Kernel::KMemoryPermission::Read)); + CASCADE_CODE(process->PageTable().SetProcessMemoryPermission( + ro_start, data_start - ro_start, Kernel::KMemoryPermission::Read)); - return process->PageTable().SetCodeMemoryPermission( + return process->PageTable().SetProcessMemoryPermission( data_start, bss_end_addr - data_start, Kernel::KMemoryPermission::ReadAndWrite); } From 2726d705f8dde6d8fcbcfcd55e065a0598e10969 Mon Sep 17 00:00:00 2001 From: Morph <39850852+Morph1984@users.noreply.github.com> Date: Sat, 20 Nov 2021 20:23:59 -0500 Subject: [PATCH 2/3] kernel: svc: Implement SetProcessMemoryPermission - Used by Skyline modding framework --- src/core/hle/kernel/svc.cpp | 42 ++++++++++++++++++++++++++++++++++++- 1 file changed, 41 insertions(+), 1 deletion(-) diff --git a/src/core/hle/kernel/svc.cpp b/src/core/hle/kernel/svc.cpp index f9d99bc51..23dc44780 100644 --- a/src/core/hle/kernel/svc.cpp +++ b/src/core/hle/kernel/svc.cpp @@ -1183,6 +1183,18 @@ constexpr bool IsValidRemoteSharedMemoryPermission(Svc::MemoryPermission perm) { return IsValidSharedMemoryPermission(perm) || perm == Svc::MemoryPermission::DontCare; } +constexpr bool IsValidProcessMemoryPermission(Svc::MemoryPermission perm) { + switch (perm) { + case Svc::MemoryPermission::None: + case Svc::MemoryPermission::Read: + case Svc::MemoryPermission::ReadWrite: + case Svc::MemoryPermission::ReadExecute: + return true; + default: + return false; + } +} + static ResultCode MapSharedMemory(Core::System& system, Handle shmem_handle, VAddr address, u64 size, Svc::MemoryPermission map_perm) { LOG_TRACE(Kernel_SVC, @@ -1262,6 +1274,34 @@ static ResultCode UnmapSharedMemory32(Core::System& system, Handle shmem_handle, return UnmapSharedMemory(system, shmem_handle, address, size); } +static ResultCode SetProcessMemoryPermission(Core::System& system, Handle process_handle, + VAddr address, u64 size, Svc::MemoryPermission perm) { + LOG_TRACE(Kernel_SVC, + "called, process_handle=0x{:X}, addr=0x{:X}, size=0x{:X}, permissions=0x{:08X}", + process_handle, address, size, perm); + + // Validate the address/size. + R_UNLESS(Common::IsAligned(address, PageSize), ResultInvalidAddress); + R_UNLESS(Common::IsAligned(size, PageSize), ResultInvalidSize); + R_UNLESS(size > 0, ResultInvalidSize); + R_UNLESS((address < address + size), ResultInvalidCurrentMemory); + + // Validate the memory permission. + R_UNLESS(IsValidProcessMemoryPermission(perm), ResultInvalidNewMemoryPermission); + + // Get the process from its handle. + KScopedAutoObject process = + system.CurrentProcess()->GetHandleTable().GetObject(process_handle); + R_UNLESS(process.IsNotNull(), ResultInvalidHandle); + + // Validate that the address is in range. + auto& page_table = process->PageTable(); + R_UNLESS(page_table.Contains(address, size), ResultInvalidCurrentMemory); + + // Set the memory permission. + return page_table.SetProcessMemoryPermission(address, size, ConvertToKMemoryPermission(perm)); +} + static ResultCode QueryProcessMemory(Core::System& system, VAddr memory_info_address, VAddr page_info_address, Handle process_handle, VAddr address) { @@ -2588,7 +2628,7 @@ static const FunctionDef SVC_Table_64[] = { {0x70, nullptr, "CreatePort"}, {0x71, nullptr, "ManageNamedPort"}, {0x72, nullptr, "ConnectToPort"}, - {0x73, nullptr, "SetProcessMemoryPermission"}, + {0x73, SvcWrap64, "SetProcessMemoryPermission"}, {0x74, nullptr, "MapProcessMemory"}, {0x75, nullptr, "UnmapProcessMemory"}, {0x76, SvcWrap64, "QueryProcessMemory"}, From 5cf93c134684f7548572ff27131901f5909725fa Mon Sep 17 00:00:00 2001 From: Morph <39850852+Morph1984@users.noreply.github.com> Date: Sat, 20 Nov 2021 21:54:46 -0500 Subject: [PATCH 3/3] kernel: svc: Move all IsValid functions to an anonymous namespace --- src/core/hle/kernel/svc.cpp | 18 +++++++++++++++--- 1 file changed, 15 insertions(+), 3 deletions(-) diff --git a/src/core/hle/kernel/svc.cpp b/src/core/hle/kernel/svc.cpp index 23dc44780..f0cd8471e 100644 --- a/src/core/hle/kernel/svc.cpp +++ b/src/core/hle/kernel/svc.cpp @@ -1169,6 +1169,8 @@ static u32 GetCurrentProcessorNumber32(Core::System& system) { return GetCurrentProcessorNumber(system); } +namespace { + constexpr bool IsValidSharedMemoryPermission(Svc::MemoryPermission perm) { switch (perm) { case Svc::MemoryPermission::Read: @@ -1179,7 +1181,7 @@ constexpr bool IsValidSharedMemoryPermission(Svc::MemoryPermission perm) { } } -constexpr bool IsValidRemoteSharedMemoryPermission(Svc::MemoryPermission perm) { +[[maybe_unused]] constexpr bool IsValidRemoteSharedMemoryPermission(Svc::MemoryPermission perm) { return IsValidSharedMemoryPermission(perm) || perm == Svc::MemoryPermission::DontCare; } @@ -1195,6 +1197,8 @@ constexpr bool IsValidProcessMemoryPermission(Svc::MemoryPermission perm) { } } +} // Anonymous namespace + static ResultCode MapSharedMemory(Core::System& system, Handle shmem_handle, VAddr address, u64 size, Svc::MemoryPermission map_perm) { LOG_TRACE(Kernel_SVC, @@ -1499,10 +1503,14 @@ static void ExitProcess32(Core::System& system) { ExitProcess(system); } -static constexpr bool IsValidVirtualCoreId(int32_t core_id) { +namespace { + +constexpr bool IsValidVirtualCoreId(int32_t core_id) { return (0 <= core_id && core_id < static_cast(Core::Hardware::NUM_CPU_CORES)); } +} // Anonymous namespace + /// Creates a new thread static ResultCode CreateThread(Core::System& system, Handle* out_handle, VAddr entry_point, u64 arg, VAddr stack_bottom, u32 priority, s32 core_id) { @@ -1886,7 +1894,9 @@ static ResultCode ResetSignal32(Core::System& system, Handle handle) { return ResetSignal(system, handle); } -static constexpr bool IsValidTransferMemoryPermission(MemoryPermission perm) { +namespace { + +constexpr bool IsValidTransferMemoryPermission(MemoryPermission perm) { switch (perm) { case MemoryPermission::None: case MemoryPermission::Read: @@ -1897,6 +1907,8 @@ static constexpr bool IsValidTransferMemoryPermission(MemoryPermission perm) { } } +} // Anonymous namespace + /// Creates a TransferMemory object static ResultCode CreateTransferMemory(Core::System& system, Handle* out, VAddr address, u64 size, MemoryPermission map_perm) {