1 files changed, 56 insertions, 4 deletions

diff --git a/src/core/hle/kernel/svc.cpp b/src/core/hle/kernel/svc.cpp
index f9d99bc51..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:
@@ -1179,10 +1181,24 @@ 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;
 }
 
+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;
+    }
+}
+
+} // Anonymous namespace
+
 static ResultCode MapSharedMemory(Core::System& system, Handle shmem_handle, VAddr address,
                                   u64 size, Svc::MemoryPermission map_perm) {
     LOG_TRACE(Kernel_SVC,
@@ -1262,6 +1278,34 @@ 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<KProcess>(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) {
@@ -1459,10 +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<int32_t>(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) {
@@ -1846,7 +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:
@@ -1857,6 +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) {
@@ -2588,7 +2640,7 @@ static const FunctionDef SVC_Table_64[] = {
     {0x70, nullptr, "CreatePort"},
     {0x71, nullptr, "ManageNamedPort"},
     {0x72, nullptr, "ConnectToPort"},
-    {0x73, nullptr, "SetProcessMemoryPermission"},
+    {0x73, SvcWrap64<SetProcessMemoryPermission>, "SetProcessMemoryPermission"},
     {0x74, nullptr, "MapProcessMemory"},
     {0x75, nullptr, "UnmapProcessMemory"},
     {0x76, SvcWrap64<QueryProcessMemory>, "QueryProcessMemory"},