6 files changed, 68 insertions, 45 deletions

diff --git a/src/core/hle/kernel/k_page_table.cpp b/src/core/hle/kernel/k_page_table.cpp
index 23734b501..27d86c9a4 100644
--- a/src/core/hle/kernel/k_page_table.cpp
+++ b/src/core/hle/kernel/k_page_table.cpp
@@ -713,50 +713,61 @@ ResultCode KPageTable::UnmapPages(VAddr addr, KPageLinkedList& page_linked_list,
 }
 
 ResultCode KPageTable::SetProcessMemoryPermission(VAddr addr, std::size_t size,
-                                                  KMemoryPermission perm) {
+                                                  Svc::MemoryPermission svc_perm) {
+    const size_t num_pages = size / PageSize;
 
+    // Lock the table.
     std::lock_guard lock{page_table_lock};
 
-    KMemoryState prev_state{};
-    KMemoryPermission prev_perm{};
-
-    CASCADE_CODE(CheckMemoryState(
-        &prev_state, &prev_perm, nullptr, nullptr, addr, size, KMemoryState::FlagCode,
-        KMemoryState::FlagCode, KMemoryPermission::None, KMemoryPermission::None,
-        KMemoryAttribute::Mask, KMemoryAttribute::None, KMemoryAttribute::IpcAndDeviceMapped));
-
-    KMemoryState state{prev_state};
+    // Verify we can change the memory permission.
+    KMemoryState old_state;
+    KMemoryPermission old_perm;
+    size_t num_allocator_blocks;
+    R_TRY(this->CheckMemoryState(std::addressof(old_state), std::addressof(old_perm), nullptr,
+                                 std::addressof(num_allocator_blocks), addr, size,
+                                 KMemoryState::FlagCode, KMemoryState::FlagCode,
+                                 KMemoryPermission::None, KMemoryPermission::None,
+                                 KMemoryAttribute::All, KMemoryAttribute::None));
 
-    // Ensure state is mutable if permission allows write
-    if ((perm & KMemoryPermission::Write) != KMemoryPermission::None) {
-        if (prev_state == KMemoryState::Code) {
-            state = KMemoryState::CodeData;
-        } else if (prev_state == KMemoryState::AliasCode) {
-            state = KMemoryState::AliasCodeData;
-        } else {
+    // Determine new perm/state.
+    const KMemoryPermission new_perm = ConvertToKMemoryPermission(svc_perm);
+    KMemoryState new_state = old_state;
+    const bool is_w = (new_perm & KMemoryPermission::UserWrite) == KMemoryPermission::UserWrite;
+    const bool is_x = (new_perm & KMemoryPermission::UserExecute) == KMemoryPermission::UserExecute;
+    const bool was_x =
+        (old_perm & KMemoryPermission::UserExecute) == KMemoryPermission::UserExecute;
+    ASSERT(!(is_w && is_x));
+
+    if (is_w) {
+        switch (old_state) {
+        case KMemoryState::Code:
+            new_state = KMemoryState::CodeData;
+            break;
+        case KMemoryState::AliasCode:
+            new_state = KMemoryState::AliasCodeData;
+            break;
+        default:
             UNREACHABLE();
         }
     }
 
-    // Return early if there is nothing to change
-    if (state == prev_state && perm == prev_perm) {
-        return ResultSuccess;
-    }
+    // Succeed if there's nothing to do.
+    R_SUCCEED_IF(old_perm == new_perm && old_state == new_state);
 
-    if ((prev_perm & KMemoryPermission::Execute) != (perm & KMemoryPermission::Execute)) {
+    // Perform mapping operation.
+    const auto operation =
+        was_x ? OperationType::ChangePermissionsAndRefresh : OperationType::ChangePermissions;
+    R_TRY(Operate(addr, num_pages, new_perm, operation));
+
+    // Update the blocks.
+    block_manager->Update(addr, num_pages, new_state, new_perm, KMemoryAttribute::None);
+
+    // Ensure cache coherency, if we're setting pages as executable.
+    if (is_x) {
         // Memory execution state is changing, invalidate CPU cache range
         system.InvalidateCpuInstructionCacheRange(addr, size);
     }
 
-    const std::size_t num_pages{size / PageSize};
-    const OperationType operation{(perm & KMemoryPermission::Execute) != KMemoryPermission::None
-                                      ? OperationType::ChangePermissionsAndRefresh
-                                      : OperationType::ChangePermissions};
-
-    CASCADE_CODE(Operate(addr, num_pages, perm, operation));
-
-    block_manager->Update(addr, num_pages, state, perm);
-
     return ResultSuccess;
 }
 
diff --git a/src/core/hle/kernel/k_page_table.h b/src/core/hle/kernel/k_page_table.h
index a596bf381..274644181 100644
--- a/src/core/hle/kernel/k_page_table.h
+++ b/src/core/hle/kernel/k_page_table.h
@@ -43,7 +43,8 @@ public:
     ResultCode MapPages(VAddr addr, KPageLinkedList& page_linked_list, KMemoryState state,
                         KMemoryPermission perm);
     ResultCode UnmapPages(VAddr addr, KPageLinkedList& page_linked_list, KMemoryState state);
-    ResultCode SetProcessMemoryPermission(VAddr addr, std::size_t size, KMemoryPermission perm);
+    ResultCode SetProcessMemoryPermission(VAddr addr, std::size_t size,
+                                          Svc::MemoryPermission svc_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 856c200d3..cca405fed 100644
--- a/src/core/hle/kernel/k_process.cpp
+++ b/src/core/hle/kernel/k_process.cpp
@@ -541,16 +541,16 @@ void KProcess::FreeTLSRegion(VAddr tls_address) {
 
 void KProcess::LoadModule(CodeSet code_set, VAddr base_addr) {
     const auto ReprotectSegment = [&](const CodeSet::Segment& segment,
-                                      KMemoryPermission permission) {
+                                      Svc::MemoryPermission permission) {
         page_table->SetProcessMemoryPermission(segment.addr + base_addr, segment.size, permission);
     };
 
     kernel.System().Memory().WriteBlock(*this, base_addr, code_set.memory.data(),
                                         code_set.memory.size());
 
-    ReprotectSegment(code_set.CodeSegment(), KMemoryPermission::ReadAndExecute);
-    ReprotectSegment(code_set.RODataSegment(), KMemoryPermission::Read);
-    ReprotectSegment(code_set.DataSegment(), KMemoryPermission::UserReadWrite);
+    ReprotectSegment(code_set.CodeSegment(), Svc::MemoryPermission::ReadExecute);
+    ReprotectSegment(code_set.RODataSegment(), Svc::MemoryPermission::Read);
+    ReprotectSegment(code_set.DataSegment(), Svc::MemoryPermission::ReadWrite);
 }
 
 bool KProcess::IsSignaled() const {
diff --git a/src/core/hle/kernel/physical_core.cpp b/src/core/hle/kernel/physical_core.cpp
index 7f02d9471..7477668e4 100644
--- a/src/core/hle/kernel/physical_core.cpp
+++ b/src/core/hle/kernel/physical_core.cpp
@@ -16,17 +16,25 @@ namespace Kernel {
 PhysicalCore::PhysicalCore(std::size_t core_index_, Core::System& system_, KScheduler& scheduler_,
                            Core::CPUInterrupts& interrupts_)
     : core_index{core_index_}, system{system_}, scheduler{scheduler_},
-      interrupts{interrupts_}, guard{std::make_unique<Common::SpinLock>()} {}
+      interrupts{interrupts_}, guard{std::make_unique<Common::SpinLock>()} {
+#ifdef ARCHITECTURE_x86_64
+    // TODO(bunnei): Initialization relies on a core being available. We may later replace this with
+    // a 32-bit instance of Dynarmic. This should be abstracted out to a CPU manager.
+    auto& kernel = system.Kernel();
+    arm_interface = std::make_unique<Core::ARM_Dynarmic_64>(
+        system, interrupts, kernel.IsMulticore(), kernel.GetExclusiveMonitor(), core_index);
+#else
+#error Platform not supported yet.
+#endif
+}
 
 PhysicalCore::~PhysicalCore() = default;
 
 void PhysicalCore::Initialize([[maybe_unused]] bool is_64_bit) {
 #ifdef ARCHITECTURE_x86_64
     auto& kernel = system.Kernel();
-    if (is_64_bit) {
-        arm_interface = std::make_unique<Core::ARM_Dynarmic_64>(
-            system, interrupts, kernel.IsMulticore(), kernel.GetExclusiveMonitor(), core_index);
-    } else {
+    if (!is_64_bit) {
+        // We already initialized a 64-bit core, replace with a 32-bit one.
         arm_interface = std::make_unique<Core::ARM_Dynarmic_32>(
             system, interrupts, kernel.IsMulticore(), kernel.GetExclusiveMonitor(), core_index);
     }
diff --git a/src/core/hle/kernel/svc.cpp b/src/core/hle/kernel/svc.cpp
index 55ce0236f..c7f5140f4 100644
--- a/src/core/hle/kernel/svc.cpp
+++ b/src/core/hle/kernel/svc.cpp
@@ -1309,6 +1309,8 @@ static ResultCode SetProcessMemoryPermission(Core::System& system, Handle proces
     R_UNLESS(Common::IsAligned(size, PageSize), ResultInvalidSize);
     R_UNLESS(size > 0, ResultInvalidSize);
     R_UNLESS((address < address + size), ResultInvalidCurrentMemory);
+    R_UNLESS(address == static_cast<uintptr_t>(address), ResultInvalidCurrentMemory);
+    R_UNLESS(size == static_cast<size_t>(size), ResultInvalidCurrentMemory);
 
     // Validate the memory permission.
     R_UNLESS(IsValidProcessMemoryPermission(perm), ResultInvalidNewMemoryPermission);
@@ -1323,7 +1325,7 @@ static ResultCode SetProcessMemoryPermission(Core::System& system, Handle proces
     R_UNLESS(page_table.Contains(address, size), ResultInvalidCurrentMemory);
 
     // Set the memory permission.
-    return page_table.SetProcessMemoryPermission(address, size, ConvertToKMemoryPermission(perm));
+    return page_table.SetProcessMemoryPermission(address, size, perm);
 }
 
 static ResultCode MapProcessMemory(Core::System& system, VAddr dst_address, Handle process_handle,
diff --git a/src/core/hle/service/ldr/ldr.cpp b/src/core/hle/service/ldr/ldr.cpp
index 28d8114c5..9fc7bb1b1 100644
--- a/src/core/hle/service/ldr/ldr.cpp
+++ b/src/core/hle/service/ldr/ldr.cpp
@@ -14,6 +14,7 @@
 #include "core/hle/kernel/k_page_table.h"
 #include "core/hle/kernel/k_system_control.h"
 #include "core/hle/kernel/svc_results.h"
+#include "core/hle/kernel/svc_types.h"
 #include "core/hle/service/ldr/ldr.h"
 #include "core/hle/service/service.h"
 #include "core/loader/nro.h"
@@ -397,12 +398,12 @@ public:
                  nro_header.segment_headers[DATA_INDEX].memory_size);
 
         CASCADE_CODE(process->PageTable().SetProcessMemoryPermission(
-            text_start, ro_start - text_start, Kernel::KMemoryPermission::ReadAndExecute));
+            text_start, ro_start - text_start, Kernel::Svc::MemoryPermission::ReadExecute));
         CASCADE_CODE(process->PageTable().SetProcessMemoryPermission(
-            ro_start, data_start - ro_start, Kernel::KMemoryPermission::Read));
+            ro_start, data_start - ro_start, Kernel::Svc::MemoryPermission::Read));
 
         return process->PageTable().SetProcessMemoryPermission(
-            data_start, bss_end_addr - data_start, Kernel::KMemoryPermission::UserReadWrite);
+            data_start, bss_end_addr - data_start, Kernel::Svc::MemoryPermission::ReadWrite);
     }
 
     void LoadModule(Kernel::HLERequestContext& ctx) {