kernel: Improve accuracy of KResourceLimit emulation (#7221)

* core: Refactor resource limits

* svc: Implement SetResourceLimitLimitValues

* Also correct existing name and add missing error codes

src/core/hle/kernel/address_arbiter.cpp

@@ -9,6 +9,7 @@
 #include "core/hle/kernel/address_arbiter.h"
 #include "core/hle/kernel/errors.h"
 #include "core/hle/kernel/kernel.h"
+#include "core/hle/kernel/resource_limit.h"
 #include "core/hle/kernel/thread.h"
 #include "core/memory.h"
 
@@ -68,13 +69,16 @@ bool AddressArbiter::ResumeHighestPriorityThread(VAddr address) {
 
 AddressArbiter::AddressArbiter(KernelSystem& kernel)
     : Object(kernel), kernel(kernel), timeout_callback(std::make_shared<Callback>(*this)) {}
-AddressArbiter::~AddressArbiter() {}
+
+AddressArbiter::~AddressArbiter() {
+    if (resource_limit) {
+        resource_limit->Release(ResourceLimitType::AddressArbiter, 1);
+    }
+}
 
 std::shared_ptr<AddressArbiter> KernelSystem::CreateAddressArbiter(std::string name) {
-    auto address_arbiter{std::make_shared<AddressArbiter>(*this)};
-
+    auto address_arbiter = std::make_shared<AddressArbiter>(*this);
     address_arbiter->name = std::move(name);
-
     return address_arbiter;
 }
 

src/core/hle/kernel/address_arbiter.h

@@ -25,6 +25,7 @@
 namespace Kernel {
 
 class Thread;
+class ResourceLimit;
 
 enum class ArbitrationType : u32 {
     Signal,
@@ -51,6 +52,7 @@ public:
         return HANDLE_TYPE;
     }
 
+    std::shared_ptr<ResourceLimit> resource_limit;
     std::string name; ///< Name of address arbiter object (optional)
 
     ResultCode ArbitrateAddress(std::shared_ptr<Thread> thread, ArbitrationType type, VAddr address,
@@ -86,6 +88,7 @@ private:
         ar& name;
         ar& waiting_threads;
         ar& timeout_callback;
+        ar& resource_limit;
     }
 };
 

src/core/hle/kernel/errors.h

@@ -9,6 +9,12 @@
 namespace Kernel {
 namespace ErrCodes {
 enum {
+    OutOfSharedMems = 11,
+    OutOfThreads = 12,
+    OutOfMutexes = 13,
+    OutOfSemaphores = 14,
+    OutOfEvents = 15,
+    OutOfTimers = 16,
     OutOfHandles = 19,
     SessionClosedByRemote = 26,
     PortNameTooLong = 30,
@@ -16,6 +22,7 @@ enum {
     NoPendingSessions = 35,
     WrongPermission = 46,
     InvalidBufferDescriptor = 48,
+    OutOfAddressArbiters = 51,
     MaxConnectionsReached = 52,
     CommandTooLarge = 54,
 };

src/core/hle/kernel/event.cpp

@@ -2,12 +2,11 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
-#include <algorithm>
-#include <vector>
 #include "common/archives.h"
 #include "common/assert.h"
 #include "core/hle/kernel/event.h"
 #include "core/hle/kernel/kernel.h"
+#include "core/hle/kernel/resource_limit.h"
 #include "core/hle/kernel/thread.h"
 
 SERIALIZE_EXPORT_IMPL(Kernel::Event)
@@ -15,16 +14,19 @@ SERIALIZE_EXPORT_IMPL(Kernel::Event)
 namespace Kernel {
 
 Event::Event(KernelSystem& kernel) : WaitObject(kernel) {}
-Event::~Event() {}
+
+Event::~Event() {
+    if (resource_limit) {
+        resource_limit->Release(ResourceLimitType::Event, 1);
+    }
+}
 
 std::shared_ptr<Event> KernelSystem::CreateEvent(ResetType reset_type, std::string name) {
-    auto evt{std::make_shared<Event>(*this)};
-
-    evt->signaled = false;
-    evt->reset_type = reset_type;
-    evt->name = std::move(name);
-
-    return evt;
+    auto event = std::make_shared<Event>(*this);
+    event->signaled = false;
+    event->reset_type = reset_type;
+    event->name = std::move(name);
+    return event;
 }
 
 bool Event::ShouldWait(const Thread* thread) const {

src/core/hle/kernel/event.h

@@ -7,8 +7,8 @@
 #include <boost/serialization/base_object.hpp>
 #include <boost/serialization/export.hpp>
 #include <boost/serialization/string.hpp>
-#include "common/common_types.h"
 #include "core/hle/kernel/object.h"
+#include "core/hle/kernel/resource_limit.h"
 #include "core/hle/kernel/wait_object.h"
 
 namespace Kernel {
@@ -45,6 +45,8 @@ public:
     void Signal();
     void Clear();
 
+    std::shared_ptr<ResourceLimit> resource_limit;
+
 private:
     ResetType reset_type; ///< Current ResetType
 
@@ -60,6 +62,7 @@ private:
         ar& reset_type;
         ar& signaled;
         ar& name;
+        ar& resource_limit;
     }
 };
 

src/core/hle/kernel/kernel.cpp

@@ -137,6 +137,10 @@ const SharedPage::Handler& KernelSystem::GetSharedPageHandler() const {
     return *shared_page_handler;
 }
 
+ConfigMem::Handler& KernelSystem::GetConfigMemHandler() {
+    return *config_mem_handler;
+}
+
 IPCDebugger::Recorder& KernelSystem::GetIPCRecorder() {
     return *ipc_recorder;
 }

src/core/hle/kernel/kernel.h

@@ -295,6 +295,8 @@ public:
     SharedPage::Handler& GetSharedPageHandler();
     const SharedPage::Handler& GetSharedPageHandler() const;
 
+    ConfigMem::Handler& GetConfigMemHandler();
+
     IPCDebugger::Recorder& GetIPCRecorder();
     const IPCDebugger::Recorder& GetIPCRecorder() const;
 

src/core/hle/kernel/mutex.cpp

@@ -2,15 +2,14 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
-#include <vector>
 #include "common/archives.h"
 #include "common/assert.h"
 #include "core/core.h"
-#include "core/global.h"
 #include "core/hle/kernel/errors.h"
 #include "core/hle/kernel/kernel.h"
 #include "core/hle/kernel/mutex.h"
 #include "core/hle/kernel/object.h"
+#include "core/hle/kernel/resource_limit.h"
 #include "core/hle/kernel/thread.h"
 
 SERIALIZE_EXPORT_IMPL(Kernel::Mutex)
@@ -27,18 +26,23 @@ void ReleaseThreadMutexes(Thread* thread) {
 }
 
 Mutex::Mutex(KernelSystem& kernel) : WaitObject(kernel), kernel(kernel) {}
-Mutex::~Mutex() {}
+
+Mutex::~Mutex() {
+    if (resource_limit) {
+        resource_limit->Release(ResourceLimitType::Mutex, 1);
+    }
+}
 
 std::shared_ptr<Mutex> KernelSystem::CreateMutex(bool initial_locked, std::string name) {
-    auto mutex{std::make_shared<Mutex>(*this)};
-
+    auto mutex = std::make_shared<Mutex>(*this);
     mutex->lock_count = 0;
     mutex->name = std::move(name);
     mutex->holding_thread = nullptr;
 
     // Acquire mutex with current thread if initialized as locked
-    if (initial_locked)
-        mutex->Acquire(thread_managers[current_cpu->GetID()]->GetCurrentThread());
+    if (initial_locked) {
+        mutex->Acquire(GetCurrentThreadManager().GetCurrentThread());
+    }
 
     return mutex;
 }

src/core/hle/kernel/mutex.h

@@ -12,6 +12,7 @@
 #include <boost/serialization/string.hpp>
 #include "common/common_types.h"
 #include "core/hle/kernel/kernel.h"
+#include "core/hle/kernel/resource_limit.h"
 #include "core/hle/kernel/wait_object.h"
 #include "core/hle/result.h"
 
@@ -36,6 +37,7 @@ public:
         return HANDLE_TYPE;
     }
 
+    std::shared_ptr<ResourceLimit> resource_limit;
     int lock_count;   ///< Number of times the mutex has been acquired
     u32 priority;     ///< The priority of the mutex, used for priority inheritance.
     std::string name; ///< Name of mutex (optional)
@@ -71,6 +73,7 @@ private:
         ar& priority;
         ar& name;
         ar& holding_thread;
+        ar& resource_limit;
     }
 };
 

src/core/hle/kernel/process.cpp

@@ -185,6 +185,11 @@ void Process::Set3dsxKernelCaps() {
 void Process::Run(s32 main_thread_priority, u32 stack_size) {
     memory_region = kernel.GetMemoryRegion(flags.memory_region);
 
+    // Ensure we can reserve a thread. Real kernel returns 0xC860180C if this fails.
+    if (!resource_limit->Reserve(ResourceLimitType::Thread, 1)) {
+        return;
+    }
+
     auto MapSegment = [&](CodeSet::Segment& segment, VMAPermission permissions,
                           MemoryState memory_state) {
         HeapAllocate(segment.addr, segment.size, permissions, memory_state, true);
@@ -281,7 +286,7 @@ ResultVal<VAddr> Process::HeapAllocate(VAddr target, u32 size, VMAPermission per
 
     holding_memory += allocated_fcram;
     memory_used += size;
-    resource_limit->current_commit += size;
+    resource_limit->Reserve(ResourceLimitType::Commit, size);
 
     return target;
 }
@@ -310,7 +315,7 @@ ResultCode Process::HeapFree(VAddr target, u32 size) {
     ASSERT(result.IsSuccess());
 
     memory_used -= size;
-    resource_limit->current_commit -= size;
+    resource_limit->Release(ResourceLimitType::Commit, size);
 
     return RESULT_SUCCESS;
 }
@@ -356,7 +361,7 @@ ResultVal<VAddr> Process::LinearAllocate(VAddr target, u32 size, VMAPermission p
 
     holding_memory += MemoryRegionInfo::Interval(physical_offset, physical_offset + size);
     memory_used += size;
-    resource_limit->current_commit += size;
+    resource_limit->Reserve(ResourceLimitType::Commit, size);
 
     LOG_DEBUG(Kernel, "Allocated at target={:08X}", target);
     return target;
@@ -385,7 +390,7 @@ ResultCode Process::LinearFree(VAddr target, u32 size) {
 
     holding_memory -= MemoryRegionInfo::Interval(physical_offset, physical_offset + size);
     memory_used -= size;
-    resource_limit->current_commit -= size;
+    resource_limit->Release(ResourceLimitType::Commit, size);
 
     return RESULT_SUCCESS;
 }
@@ -569,7 +574,7 @@ void Process::FreeAllMemory() {
         auto size = entry.upper() - entry.lower();
         memory_region->Free(entry.lower(), size);
         memory_used -= size;
-        resource_limit->current_commit -= size;
+        resource_limit->Release(ResourceLimitType::Commit, size);
     }
     holding_memory.clear();
 
@@ -590,7 +595,7 @@ void Process::FreeAllMemory() {
     // leaks in these values still.
     LOG_DEBUG(Kernel, "Remaining memory used after process cleanup: 0x{:08X}", memory_used);
     LOG_DEBUG(Kernel, "Remaining memory resource commit after process cleanup: 0x{:08X}",
-              resource_limit->current_commit);
+              resource_limit->GetCurrentValue(ResourceLimitType::Commit));
 }
 
 Kernel::Process::Process(KernelSystem& kernel)

src/core/hle/kernel/resource_limit.cpp

@@ -2,10 +2,8 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
-#include <cstring>
 #include "common/archives.h"
 #include "common/assert.h"
-#include "common/logging/log.h"
 #include "common/settings.h"
 #include "core/hle/kernel/resource_limit.h"
 
@@ -14,145 +12,130 @@ SERIALIZE_EXPORT_IMPL(Kernel::ResourceLimit)
 namespace Kernel {
 
 ResourceLimit::ResourceLimit(KernelSystem& kernel) : Object(kernel) {}
-ResourceLimit::~ResourceLimit() {}
+
+ResourceLimit::~ResourceLimit() = default;
 
 std::shared_ptr<ResourceLimit> ResourceLimit::Create(KernelSystem& kernel, std::string name) {
-    auto resource_limit{std::make_shared<ResourceLimit>(kernel)};
-
-    resource_limit->name = std::move(name);
+    auto resource_limit = std::make_shared<ResourceLimit>(kernel);
+    resource_limit->m_name = std::move(name);
     return resource_limit;
 }
 
-std::shared_ptr<ResourceLimit> ResourceLimitList::GetForCategory(ResourceLimitCategory category) {
-    switch (category) {
-    case ResourceLimitCategory::APPLICATION:
-    case ResourceLimitCategory::SYS_APPLET:
-    case ResourceLimitCategory::LIB_APPLET:
-    case ResourceLimitCategory::OTHER:
-        return resource_limits[static_cast<u8>(category)];
-    default:
-        LOG_CRITICAL(Kernel, "Unknown resource limit category");
-        UNREACHABLE();
-    }
+s32 ResourceLimit::GetCurrentValue(ResourceLimitType type) const {
+    const auto index = static_cast<size_t>(type);
+    return m_current_values[index];
 }
 
-s32 ResourceLimit::GetCurrentResourceValue(u32 resource) const {
-    switch (resource) {
-    case COMMIT:
-        return current_commit;
-    case THREAD:
-        return current_threads;
-    case EVENT:
-        return current_events;
-    case MUTEX:
-        return current_mutexes;
-    case SEMAPHORE:
-        return current_semaphores;
-    case TIMER:
-        return current_timers;
-    case SHARED_MEMORY:
-        return current_shared_mems;
-    case ADDRESS_ARBITER:
-        return current_address_arbiters;
-    case CPU_TIME:
-        return current_cpu_time;
-    default:
-        LOG_ERROR(Kernel, "Unknown resource type={:08X}", resource);
-        UNIMPLEMENTED();
-        return 0;
-    }
+s32 ResourceLimit::GetLimitValue(ResourceLimitType type) const {
+    const auto index = static_cast<size_t>(type);
+    return m_limit_values[index];
 }
 
-u32 ResourceLimit::GetMaxResourceValue(u32 resource) const {
-    switch (resource) {
-    case PRIORITY:
-        return max_priority;
-    case COMMIT:
-        return max_commit;
-    case THREAD:
-        return max_threads;
-    case EVENT:
-        return max_events;
-    case MUTEX:
-        return max_mutexes;
-    case SEMAPHORE:
-        return max_semaphores;
-    case TIMER:
-        return max_timers;
-    case SHARED_MEMORY:
-        return max_shared_mems;
-    case ADDRESS_ARBITER:
-        return max_address_arbiters;
-    case CPU_TIME:
-        return max_cpu_time;
-    default:
-        LOG_ERROR(Kernel, "Unknown resource type={:08X}", resource);
-        UNIMPLEMENTED();
-        return 0;
+void ResourceLimit::SetLimitValue(ResourceLimitType type, s32 value) {
+    const auto index = static_cast<size_t>(type);
+    m_limit_values[index] = value;
+}
+
+bool ResourceLimit::Reserve(ResourceLimitType type, s32 amount) {
+    const auto index = static_cast<size_t>(type);
+    const s32 limit = m_limit_values[index];
+    const s32 new_value = m_current_values[index] + amount;
+    if (new_value > limit) {
+        LOG_ERROR(Kernel, "New value {} exceeds limit {} for resource type {}", new_value, limit,
+                  type);
+        return false;
     }
+    m_current_values[index] = new_value;
+    return true;
+}
+
+bool ResourceLimit::Release(ResourceLimitType type, s32 amount) {
+    const auto index = static_cast<size_t>(type);
+    const s32 value = m_current_values[index];
+    if (amount > value) {
+        LOG_ERROR(Kernel, "Amount {} exceeds current value {} for resource type {}", amount, value,
+                  type);
+        return false;
+    }
+    m_current_values[index] = value - amount;
+    return true;
 }
 
 ResourceLimitList::ResourceLimitList(KernelSystem& kernel) {
-    // Create the four resource limits that the system uses
-    // Create the APPLICATION resource limit
+    // PM makes APPMEMALLOC always match app RESLIMIT_COMMIT.
+    // See: https://github.com/LumaTeam/Luma3DS/blob/e2778a45/sysmodules/pm/source/reslimit.c#L275
     const bool is_new_3ds = Settings::values.is_new_3ds.GetValue();
+    const auto& appmemalloc = kernel.GetMemoryRegion(MemoryRegion::APPLICATION);
 
-    std::shared_ptr<ResourceLimit> resource_limit = ResourceLimit::Create(kernel, "Applications");
-    resource_limit->max_priority = 0x18;
-    resource_limit->max_commit = is_new_3ds ? 0x7C00000 : 0x4000000;
-    resource_limit->max_threads = 0x20;
-    resource_limit->max_events = 0x20;
-    resource_limit->max_mutexes = 0x20;
-    resource_limit->max_semaphores = 0x8;
-    resource_limit->max_timers = 0x8;
-    resource_limit->max_shared_mems = 0x10;
-    resource_limit->max_address_arbiters = 0x2;
-    resource_limit->max_cpu_time = 0x0;
-    resource_limits[static_cast<u8>(ResourceLimitCategory::APPLICATION)] = resource_limit;
+    // Create the Application resource limit
+    auto resource_limit = ResourceLimit::Create(kernel, "Applications");
+    resource_limit->SetLimitValue(ResourceLimitType::Priority, 0x18);
+    resource_limit->SetLimitValue(ResourceLimitType::Commit, appmemalloc->size);
+    resource_limit->SetLimitValue(ResourceLimitType::Thread, 0x20);
+    resource_limit->SetLimitValue(ResourceLimitType::Event, 0x20);
+    resource_limit->SetLimitValue(ResourceLimitType::Mutex, 0x20);
+    resource_limit->SetLimitValue(ResourceLimitType::Semaphore, 0x8);
+    resource_limit->SetLimitValue(ResourceLimitType::Timer, 0x8);
+    resource_limit->SetLimitValue(ResourceLimitType::SharedMemory, 0x10);
+    resource_limit->SetLimitValue(ResourceLimitType::AddressArbiter, 0x2);
+    resource_limit->SetLimitValue(ResourceLimitType::CpuTime, 0x0);
+    resource_limits[static_cast<u8>(ResourceLimitCategory::Application)] = resource_limit;
 
-    // Create the SYS_APPLET resource limit
+    // Create the SysApplet resource limit
     resource_limit = ResourceLimit::Create(kernel, "System Applets");
-    resource_limit->max_priority = 0x4;
-    resource_limit->max_commit = is_new_3ds ? 0x5E06000 : 0x2606000;
-    resource_limit->max_threads = is_new_3ds ? 0x1D : 0xE;
-    resource_limit->max_events = is_new_3ds ? 0xB : 0x8;
-    resource_limit->max_mutexes = 0x8;
-    resource_limit->max_semaphores = 0x4;
-    resource_limit->max_timers = 0x4;
-    resource_limit->max_shared_mems = 0x8;
-    resource_limit->max_address_arbiters = 0x3;
-    resource_limit->max_cpu_time = 0x2710;
-    resource_limits[static_cast<u8>(ResourceLimitCategory::SYS_APPLET)] = resource_limit;
+    resource_limit->SetLimitValue(ResourceLimitType::Priority, 0x4);
+    resource_limit->SetLimitValue(ResourceLimitType::Commit, is_new_3ds ? 0x5E06000 : 0x2606000);
+    resource_limit->SetLimitValue(ResourceLimitType::Thread, is_new_3ds ? 0x1D : 0xE);
+    resource_limit->SetLimitValue(ResourceLimitType::Event, is_new_3ds ? 0xB : 0x8);
+    resource_limit->SetLimitValue(ResourceLimitType::Mutex, 0x8);
+    resource_limit->SetLimitValue(ResourceLimitType::Semaphore, 0x4);
+    resource_limit->SetLimitValue(ResourceLimitType::Timer, 0x4);
+    resource_limit->SetLimitValue(ResourceLimitType::SharedMemory, 0x8);
+    resource_limit->SetLimitValue(ResourceLimitType::AddressArbiter, 0x3);
+    resource_limit->SetLimitValue(ResourceLimitType::CpuTime, 0x2710);
+    resource_limits[static_cast<u8>(ResourceLimitCategory::SysApplet)] = resource_limit;
 
-    // Create the LIB_APPLET resource limit
+    // Create the LibApplet resource limit
     resource_limit = ResourceLimit::Create(kernel, "Library Applets");
-    resource_limit->max_priority = 0x4;
-    resource_limit->max_commit = 0x602000;
-    resource_limit->max_threads = 0xE;
-    resource_limit->max_events = 0x8;
-    resource_limit->max_mutexes = 0x8;
-    resource_limit->max_semaphores = 0x4;
-    resource_limit->max_timers = 0x4;
-    resource_limit->max_shared_mems = 0x8;
-    resource_limit->max_address_arbiters = 0x1;
-    resource_limit->max_cpu_time = 0x2710;
-    resource_limits[static_cast<u8>(ResourceLimitCategory::LIB_APPLET)] = resource_limit;
+    resource_limit->SetLimitValue(ResourceLimitType::Priority, 0x4);
+    resource_limit->SetLimitValue(ResourceLimitType::Commit, 0x602000);
+    resource_limit->SetLimitValue(ResourceLimitType::Thread, 0xE);
+    resource_limit->SetLimitValue(ResourceLimitType::Event, 0x8);
+    resource_limit->SetLimitValue(ResourceLimitType::Mutex, 0x8);
+    resource_limit->SetLimitValue(ResourceLimitType::Semaphore, 0x4);
+    resource_limit->SetLimitValue(ResourceLimitType::Timer, 0x4);
+    resource_limit->SetLimitValue(ResourceLimitType::SharedMemory, 0x8);
+    resource_limit->SetLimitValue(ResourceLimitType::AddressArbiter, 0x1);
+    resource_limit->SetLimitValue(ResourceLimitType::CpuTime, 0x2710);
+    resource_limits[static_cast<u8>(ResourceLimitCategory::LibApplet)] = resource_limit;
 
-    // Create the OTHER resource limit
+    // Create the Other resource limit
     resource_limit = ResourceLimit::Create(kernel, "Others");
-    resource_limit->max_priority = 0x4;
-    resource_limit->max_commit = is_new_3ds ? 0x2182000 : 0x1682000;
-    resource_limit->max_threads = is_new_3ds ? 0xE1 : 0xCA;
-    resource_limit->max_events = is_new_3ds ? 0x108 : 0xF8;
-    resource_limit->max_mutexes = is_new_3ds ? 0x25 : 0x23;
-    resource_limit->max_semaphores = is_new_3ds ? 0x43 : 0x40;
-    resource_limit->max_timers = is_new_3ds ? 0x2C : 0x2B;
-    resource_limit->max_shared_mems = is_new_3ds ? 0x1F : 0x1E;
-    resource_limit->max_address_arbiters = is_new_3ds ? 0x2D : 0x2B;
-    resource_limit->max_cpu_time = 0x3E8;
-    resource_limits[static_cast<u8>(ResourceLimitCategory::OTHER)] = resource_limit;
+    resource_limit->SetLimitValue(ResourceLimitType::Priority, 0x4);
+    resource_limit->SetLimitValue(ResourceLimitType::Commit, is_new_3ds ? 0x2182000 : 0x1682000);
+    resource_limit->SetLimitValue(ResourceLimitType::Thread, is_new_3ds ? 0xE1 : 0xCA);
+    resource_limit->SetLimitValue(ResourceLimitType::Event, is_new_3ds ? 0x108 : 0xF8);
+    resource_limit->SetLimitValue(ResourceLimitType::Mutex, is_new_3ds ? 0x25 : 0x23);
+    resource_limit->SetLimitValue(ResourceLimitType::Semaphore, is_new_3ds ? 0x43 : 0x40);
+    resource_limit->SetLimitValue(ResourceLimitType::Timer, is_new_3ds ? 0x2C : 0x2B);
+    resource_limit->SetLimitValue(ResourceLimitType::SharedMemory, is_new_3ds ? 0x1F : 0x1E);
+    resource_limit->SetLimitValue(ResourceLimitType::AddressArbiter, is_new_3ds ? 0x2D : 0x2B);
+    resource_limit->SetLimitValue(ResourceLimitType::CpuTime, 0x3E8);
+    resource_limits[static_cast<u8>(ResourceLimitCategory::Other)] = resource_limit;
 }
 
 ResourceLimitList::~ResourceLimitList() = default;
 
+std::shared_ptr<ResourceLimit> ResourceLimitList::GetForCategory(ResourceLimitCategory category) {
+    switch (category) {
+    case ResourceLimitCategory::Application:
+    case ResourceLimitCategory::SysApplet:
+    case ResourceLimitCategory::LibApplet:
+    case ResourceLimitCategory::Other:
+        return resource_limits[static_cast<u8>(category)];
+    default:
+        UNREACHABLE_MSG("Unknown resource limit category");
+    }
+}
+
 } // namespace Kernel

src/core/hle/kernel/resource_limit.h

@@ -16,23 +16,24 @@
 namespace Kernel {
 
 enum class ResourceLimitCategory : u8 {
-    APPLICATION = 0,
-    SYS_APPLET = 1,
-    LIB_APPLET = 2,
-    OTHER = 3
+    Application = 0,
+    SysApplet = 1,
+    LibApplet = 2,
+    Other = 3,
 };
 
-enum ResourceTypes {
-    PRIORITY = 0,
-    COMMIT = 1,
-    THREAD = 2,
-    EVENT = 3,
-    MUTEX = 4,
-    SEMAPHORE = 5,
-    TIMER = 6,
-    SHARED_MEMORY = 7,
-    ADDRESS_ARBITER = 8,
-    CPU_TIME = 9,
+enum class ResourceLimitType : u32 {
+    Priority = 0,
+    Commit = 1,
+    Thread = 2,
+    Event = 3,
+    Mutex = 4,
+    Semaphore = 5,
+    Timer = 6,
+    SharedMemory = 7,
+    AddressArbiter = 8,
+    CpuTime = 9,
+    Max = 10,
 };
 
 class ResourceLimit final : public Object {
@@ -50,7 +51,7 @@ public:
         return "ResourceLimit";
     }
     std::string GetName() const override {
-        return name;
+        return m_name;
     }
 
     static constexpr HandleType HANDLE_TYPE = HandleType::ResourceLimit;
@@ -58,90 +59,28 @@ public:
         return HANDLE_TYPE;
     }
 
-    /**
-     * Gets the current value for the specified resource.
-     * @param resource Requested resource type
-     * @returns The current value of the resource type
-     */
-    s32 GetCurrentResourceValue(u32 resource) const;
+    s32 GetCurrentValue(ResourceLimitType type) const;
+    s32 GetLimitValue(ResourceLimitType type) const;
 
-    /**
-     * Gets the max value for the specified resource.
-     * @param resource Requested resource type
-     * @returns The max value of the resource type
-     */
-    u32 GetMaxResourceValue(u32 resource) const;
+    void SetLimitValue(ResourceLimitType name, s32 value);
 
-    /// Name of resource limit object.
-    std::string name;
+    bool Reserve(ResourceLimitType type, s32 amount);
+    bool Release(ResourceLimitType type, s32 amount);
 
-    /// Max thread priority that a process in this category can create
-    s32 max_priority = 0;
-
-    /// Max memory that processes in this category can use
-    s32 max_commit = 0;
-
-    ///< Max number of objects that can be collectively created by the processes in this category
-    s32 max_threads = 0;
-    s32 max_events = 0;
-    s32 max_mutexes = 0;
-    s32 max_semaphores = 0;
-    s32 max_timers = 0;
-    s32 max_shared_mems = 0;
-    s32 max_address_arbiters = 0;
-
-    /// Max CPU time that the processes in this category can utilize
-    s32 max_cpu_time = 0;
-
-    // TODO(Subv): Increment these in their respective Kernel::T::Create functions, keeping in mind
-    // that APPLICATION resource limits should not be affected by the objects created by service
-    // modules.
-    // Currently we have no way of distinguishing if a Create was called by the running application,
-    // or by a service module. Approach this once we have separated the service modules into their
-    // own processes
-
-    /// Current memory that the processes in this category are using
-    s32 current_commit = 0;
-
-    ///< Current number of objects among all processes in this category
-    s32 current_threads = 0;
-    s32 current_events = 0;
-    s32 current_mutexes = 0;
-    s32 current_semaphores = 0;
-    s32 current_timers = 0;
-    s32 current_shared_mems = 0;
-    s32 current_address_arbiters = 0;
-
-    /// Current CPU time that the processes in this category are utilizing
-    s32 current_cpu_time = 0;
+private:
+    using ResourceArray = std::array<s32, static_cast<size_t>(ResourceLimitType::Max)>;
+    ResourceArray m_limit_values{};
+    ResourceArray m_current_values{};
+    std::string m_name;
 
 private:
     friend class boost::serialization::access;
     template <class Archive>
     void serialize(Archive& ar, const unsigned int file_version) {
         ar& boost::serialization::base_object<Object>(*this);
-        // NB most of these aren't used at all currently, but we're adding them here for forwards
-        // compatibility
-        ar& name;
-        ar& max_priority;
-        ar& max_commit;
-        ar& max_threads;
-        ar& max_events;
-        ar& max_mutexes;
-        ar& max_semaphores;
-        ar& max_timers;
-        ar& max_shared_mems;
-        ar& max_address_arbiters;
-        ar& max_cpu_time;
-        ar& current_commit;
-        ar& current_threads;
-        ar& current_events;
-        ar& current_mutexes;
-        ar& current_semaphores;
-        ar& current_timers;
-        ar& current_shared_mems;
-        ar& current_address_arbiters;
-        ar& current_cpu_time;
+        ar& m_name;
+        ar& m_limit_values;
+        ar& m_current_values;
     }
 };
 

src/core/hle/kernel/semaphore.cpp

@@ -3,9 +3,10 @@
 // Refer to the license.txt file included.
 
 #include "common/archives.h"
-#include "common/assert.h"
 #include "core/hle/kernel/errors.h"
 #include "core/hle/kernel/kernel.h"
+#include "core/hle/kernel/process.h"
+#include "core/hle/kernel/resource_limit.h"
 #include "core/hle/kernel/semaphore.h"
 #include "core/hle/kernel/thread.h"
 
@@ -14,23 +15,27 @@ SERIALIZE_EXPORT_IMPL(Kernel::Semaphore)
 namespace Kernel {
 
 Semaphore::Semaphore(KernelSystem& kernel) : WaitObject(kernel) {}
-Semaphore::~Semaphore() {}
+
+Semaphore::~Semaphore() {
+    if (resource_limit) {
+        resource_limit->Release(ResourceLimitType::Semaphore, 1);
+    }
+}
 
 ResultVal<std::shared_ptr<Semaphore>> KernelSystem::CreateSemaphore(s32 initial_count,
                                                                     s32 max_count,
                                                                     std::string name) {
 
-    if (initial_count > max_count)
+    if (initial_count > max_count) {
         return ERR_INVALID_COMBINATION_KERNEL;
-
-    auto semaphore{std::make_shared<Semaphore>(*this)};
+    }
 
     // When the semaphore is created, some slots are reserved for other threads,
     // and the rest is reserved for the caller thread
+    auto semaphore = std::make_shared<Semaphore>(*this);
     semaphore->max_count = max_count;
     semaphore->available_count = initial_count;
     semaphore->name = std::move(name);
-
     return semaphore;
 }
 

src/core/hle/kernel/semaphore.h

@@ -8,7 +8,6 @@
 #include <boost/serialization/base_object.hpp>
 #include <boost/serialization/export.hpp>
 #include <boost/serialization/string.hpp>
-#include <queue>
 #include "common/common_types.h"
 #include "core/hle/kernel/object.h"
 #include "core/hle/kernel/wait_object.h"
@@ -16,6 +15,8 @@
 
 namespace Kernel {
 
+class ResourceLimit;
+
 class Semaphore final : public WaitObject {
 public:
     explicit Semaphore(KernelSystem& kernel);
@@ -33,6 +34,7 @@ public:
         return HANDLE_TYPE;
     }
 
+    std::shared_ptr<ResourceLimit> resource_limit;
     s32 max_count;       ///< Maximum number of simultaneous holders the semaphore can have
     s32 available_count; ///< Number of free slots left in the semaphore
     std::string name;    ///< Name of semaphore (optional)
@@ -55,6 +57,7 @@ private:
         ar& max_count;
         ar& available_count;
         ar& name;
+        ar& resource_limit;
     }
 };
 

src/core/hle/kernel/shared_memory.cpp

@@ -6,6 +6,7 @@
 #include "common/logging/log.h"
 #include "core/hle/kernel/errors.h"
 #include "core/hle/kernel/memory.h"
+#include "core/hle/kernel/resource_limit.h"
 #include "core/hle/kernel/shared_memory.h"
 #include "core/memory.h"
 
@@ -14,6 +15,7 @@ SERIALIZE_EXPORT_IMPL(Kernel::SharedMemory)
 namespace Kernel {
 
 SharedMemory::SharedMemory(KernelSystem& kernel) : Object(kernel), kernel(kernel) {}
+
 SharedMemory::~SharedMemory() {
     for (const auto& interval : holding_memory) {
         kernel.GetMemoryRegion(MemoryRegion::SYSTEM)
@@ -22,6 +24,7 @@ SharedMemory::~SharedMemory() {
 
     auto process = owner_process.lock();
     if (process) {
+        process->resource_limit->Release(ResourceLimitType::SharedMemory, 1);
         if (base_address != 0) {
             process->vm_manager.ChangeMemoryState(base_address, size, MemoryState::Locked,
                                                   VMAPermission::None, MemoryState::Private,
@@ -35,8 +38,8 @@ SharedMemory::~SharedMemory() {
 ResultVal<std::shared_ptr<SharedMemory>> KernelSystem::CreateSharedMemory(
     std::shared_ptr<Process> owner_process, u32 size, MemoryPermission permissions,
     MemoryPermission other_permissions, VAddr address, MemoryRegion region, std::string name) {
-    auto shared_memory{std::make_shared<SharedMemory>(*this)};
 
+    auto shared_memory = std::make_shared<SharedMemory>(*this);
     shared_memory->owner_process = owner_process;
     shared_memory->name = std::move(name);
     shared_memory->size = size;

src/core/hle/kernel/svc.cpp

@@ -16,6 +16,7 @@
 #include "core/hle/kernel/address_arbiter.h"
 #include "core/hle/kernel/client_port.h"
 #include "core/hle/kernel/client_session.h"
+#include "core/hle/kernel/config_mem.h"
 #include "core/hle/kernel/errors.h"
 #include "core/hle/kernel/event.h"
 #include "core/hle/kernel/handle_table.h"
@@ -390,6 +391,8 @@ private:
                                              VAddr names, u32 name_count);
     ResultCode GetResourceLimitLimitValues(VAddr values, Handle resource_limit_handle, VAddr names,
                                            u32 name_count);
+    ResultCode SetResourceLimitLimitValues(Handle res_limit, VAddr names, VAddr resource_list,
+                                           u32 name_count);
     ResultCode CreateThread(Handle* out_handle, u32 entry_point, u32 arg, VAddr stack_top,
                             u32 priority, s32 processor_id);
     void ExitThread();
@@ -1070,9 +1073,18 @@ ResultCode SVC::ReplyAndReceive(s32* index, VAddr handles_address, s32 handle_co
 
 /// Create an address arbiter (to allocate access to shared resources)
 ResultCode SVC::CreateAddressArbiter(Handle* out_handle) {
-    std::shared_ptr<AddressArbiter> arbiter = kernel.CreateAddressArbiter();
-    CASCADE_RESULT(*out_handle,
-                   kernel.GetCurrentProcess()->handle_table.Create(std::move(arbiter)));
+    // Update address arbiter count in resource limit.
+    const auto current_process = kernel.GetCurrentProcess();
+    const auto& resource_limit = current_process->resource_limit;
+    if (!resource_limit->Reserve(ResourceLimitType::AddressArbiter, 1)) {
+        return ResultCode(ErrCodes::OutOfAddressArbiters, ErrorModule::OS,
+                          ErrorSummary::OutOfResource, ErrorLevel::Status);
+    }
+
+    // Create address arbiter.
+    const auto arbiter = kernel.CreateAddressArbiter();
+    arbiter->resource_limit = resource_limit;
+    CASCADE_RESULT(*out_handle, current_process->handle_table.Create(std::move(arbiter)));
     LOG_TRACE(Kernel_SVC, "returned handle=0x{:08X}", *out_handle);
     return RESULT_SUCCESS;
 }
@@ -1161,14 +1173,15 @@ ResultCode SVC::GetResourceLimitCurrentValues(VAddr values, Handle resource_limi
     LOG_TRACE(Kernel_SVC, "called resource_limit={:08X}, names={:08X}, name_count={}",
               resource_limit_handle, names, name_count);
 
-    std::shared_ptr<ResourceLimit> resource_limit =
+    const auto resource_limit =
         kernel.GetCurrentProcess()->handle_table.Get<ResourceLimit>(resource_limit_handle);
-    if (resource_limit == nullptr)
+    if (!resource_limit) {
         return ERR_INVALID_HANDLE;
+    }
 
-    for (unsigned int i = 0; i < name_count; ++i) {
-        u32 name = memory.Read32(names + i * sizeof(u32));
-        s64 value = resource_limit->GetCurrentResourceValue(name);
+    for (u32 i = 0; i < name_count; ++i) {
+        const u32 name = memory.Read32(names + i * sizeof(u32));
+        const s64 value = resource_limit->GetCurrentValue(static_cast<ResourceLimitType>(name));
         memory.Write64(values + i * sizeof(u64), value);
     }
 
@@ -1181,20 +1194,55 @@ ResultCode SVC::GetResourceLimitLimitValues(VAddr values, Handle resource_limit_
     LOG_TRACE(Kernel_SVC, "called resource_limit={:08X}, names={:08X}, name_count={}",
               resource_limit_handle, names, name_count);
 
-    std::shared_ptr<ResourceLimit> resource_limit =
+    const auto resource_limit =
         kernel.GetCurrentProcess()->handle_table.Get<ResourceLimit>(resource_limit_handle);
-    if (resource_limit == nullptr)
+    if (!resource_limit) {
         return ERR_INVALID_HANDLE;
+    }
 
-    for (unsigned int i = 0; i < name_count; ++i) {
-        u32 name = memory.Read32(names + i * sizeof(u32));
-        s64 value = resource_limit->GetMaxResourceValue(name);
+    for (u32 i = 0; i < name_count; ++i) {
+        const auto name = static_cast<ResourceLimitType>(memory.Read32(names + i * sizeof(u32)));
+        if (name >= ResourceLimitType::Max) {
+            return ERR_INVALID_ENUM_VALUE;
+        }
+        const s64 value = resource_limit->GetLimitValue(name);
         memory.Write64(values + i * sizeof(u64), value);
     }
 
     return RESULT_SUCCESS;
 }
 
+ResultCode SVC::SetResourceLimitLimitValues(Handle res_limit, VAddr names, VAddr resource_list,
+                                            u32 name_count) {
+    LOG_TRACE(Kernel_SVC, "called resource_limit={:08X}, names={:08X}, name_count={}", res_limit,
+              names, name_count);
+
+    const auto resource_limit =
+        kernel.GetCurrentProcess()->handle_table.Get<ResourceLimit>(res_limit);
+    if (!resource_limit) {
+        return ERR_INVALID_HANDLE;
+    }
+
+    for (u32 i = 0; i < name_count; ++i) {
+        const auto name = static_cast<ResourceLimitType>(memory.Read32(names + i * sizeof(u32)));
+        if (name >= ResourceLimitType::Max) {
+            return ERR_INVALID_ENUM_VALUE;
+        }
+        const s64 value = memory.Read64(resource_list + i * sizeof(u64));
+        const s32 value_high = value >> 32;
+        if (value_high < 0) {
+            return ERR_OUT_OF_RANGE_KERNEL;
+        }
+        if (name == ResourceLimitType::Commit && value_high != 0) {
+            auto& config_mem = kernel.GetConfigMemHandler().GetConfigMem();
+            config_mem.app_mem_alloc = value_high;
+        }
+        resource_limit->SetLimitValue(name, static_cast<s32>(value));
+    }
+
+    return RESULT_SUCCESS;
+}
+
 /// Creates a new thread
 ResultCode SVC::CreateThread(Handle* out_handle, u32 entry_point, u32 arg, VAddr stack_top,
                              u32 priority, s32 processor_id) {
@@ -1204,11 +1252,10 @@ ResultCode SVC::CreateThread(Handle* out_handle, u32 entry_point, u32 arg, VAddr
         return ERR_OUT_OF_RANGE;
     }
 
-    std::shared_ptr<Process> current_process = kernel.GetCurrentProcess();
-
-    std::shared_ptr<ResourceLimit>& resource_limit = current_process->resource_limit;
-    if (resource_limit->GetMaxResourceValue(ResourceTypes::PRIORITY) > priority &&
-        !current_process->no_thread_restrictions) {
+    const auto current_process = kernel.GetCurrentProcess();
+    const auto& resource_limit = current_process->resource_limit;
+    const u32 max_priority = resource_limit->GetLimitValue(ResourceLimitType::Priority);
+    if (max_priority > priority && !current_process->no_thread_restrictions) {
         return ERR_NOT_AUTHORIZED;
     }
 
@@ -1240,6 +1287,13 @@ ResultCode SVC::CreateThread(Handle* out_handle, u32 entry_point, u32 arg, VAddr
         break;
     }
 
+    // Update thread count in resource limit.
+    if (!resource_limit->Reserve(ResourceLimitType::Thread, 1)) {
+        return ResultCode(ErrCodes::OutOfThreads, ErrorModule::OS, ErrorSummary::OutOfResource,
+                          ErrorLevel::Status);
+    }
+
+    // Create thread.
     CASCADE_RESULT(std::shared_ptr<Thread> thread,
                    kernel.CreateThread(name, entry_point, priority, arg, processor_id, stack_top,
                                        current_process));
@@ -1284,14 +1338,16 @@ ResultCode SVC::SetThreadPriority(Handle handle, u32 priority) {
         return ERR_OUT_OF_RANGE;
     }
 
-    std::shared_ptr<Thread> thread = kernel.GetCurrentProcess()->handle_table.Get<Thread>(handle);
-    if (thread == nullptr)
+    const auto thread = kernel.GetCurrentProcess()->handle_table.Get<Thread>(handle);
+    if (!thread) {
         return ERR_INVALID_HANDLE;
+    }
 
     // Note: The kernel uses the current process's resource limit instead of
     // the one from the thread owner's resource limit.
-    std::shared_ptr<ResourceLimit>& resource_limit = kernel.GetCurrentProcess()->resource_limit;
-    if (resource_limit->GetMaxResourceValue(ResourceTypes::PRIORITY) > priority) {
+    const auto& resource_limit = kernel.GetCurrentProcess()->resource_limit;
+    const u32 max_priority = resource_limit->GetLimitValue(ResourceLimitType::Priority);
+    if (max_priority > priority) {
         return ERR_NOT_AUTHORIZED;
     }
 
@@ -1299,8 +1355,9 @@ ResultCode SVC::SetThreadPriority(Handle handle, u32 priority) {
     thread->UpdatePriority();
 
     // Update the mutexes that this thread is waiting for
-    for (auto& mutex : thread->pending_mutexes)
+    for (auto& mutex : thread->pending_mutexes) {
         mutex->UpdatePriority();
+    }
 
     system.PrepareReschedule();
     return RESULT_SUCCESS;
@@ -1308,9 +1365,19 @@ ResultCode SVC::SetThreadPriority(Handle handle, u32 priority) {
 
 /// Create a mutex
 ResultCode SVC::CreateMutex(Handle* out_handle, u32 initial_locked) {
-    std::shared_ptr<Mutex> mutex = kernel.CreateMutex(initial_locked != 0);
+    // Update mutex count in resource limit.
+    const auto current_process = kernel.GetCurrentProcess();
+    const auto& resource_limit = current_process->resource_limit;
+    if (!resource_limit->Reserve(ResourceLimitType::Mutex, 1)) {
+        return ResultCode(ErrCodes::OutOfMutexes, ErrorModule::OS, ErrorSummary::OutOfResource,
+                          ErrorLevel::Status);
+    }
+
+    // Create mutex.
+    const auto mutex = kernel.CreateMutex(initial_locked != 0);
     mutex->name = fmt::format("mutex-{:08x}", system.GetRunningCore().GetReg(14));
-    CASCADE_RESULT(*out_handle, kernel.GetCurrentProcess()->handle_table.Create(std::move(mutex)));
+    mutex->resource_limit = resource_limit;
+    CASCADE_RESULT(*out_handle, current_process->handle_table.Create(std::move(mutex)));
 
     LOG_TRACE(Kernel_SVC, "called initial_locked={} : created handle=0x{:08X}",
               initial_locked ? "true" : "false", *out_handle);
@@ -1373,11 +1440,20 @@ ResultCode SVC::GetThreadId(u32* thread_id, Handle handle) {
 
 /// Creates a semaphore
 ResultCode SVC::CreateSemaphore(Handle* out_handle, s32 initial_count, s32 max_count) {
+    // Update semaphore count in resource limit.
+    const auto current_process = kernel.GetCurrentProcess();
+    const auto& resource_limit = current_process->resource_limit;
+    if (!resource_limit->Reserve(ResourceLimitType::Semaphore, 1)) {
+        return ResultCode(ErrCodes::OutOfSemaphores, ErrorModule::OS, ErrorSummary::OutOfResource,
+                          ErrorLevel::Status);
+    }
+
+    // Create semaphore
     CASCADE_RESULT(std::shared_ptr<Semaphore> semaphore,
                    kernel.CreateSemaphore(initial_count, max_count));
     semaphore->name = fmt::format("semaphore-{:08x}", system.GetRunningCore().GetReg(14));
-    CASCADE_RESULT(*out_handle,
-                   kernel.GetCurrentProcess()->handle_table.Create(std::move(semaphore)));
+    semaphore->resource_limit = resource_limit;
+    CASCADE_RESULT(*out_handle, current_process->handle_table.Create(std::move(semaphore)));
 
     LOG_TRACE(Kernel_SVC, "called initial_count={}, max_count={}, created handle=0x{:08X}",
               initial_count, max_count, *out_handle);
@@ -1461,10 +1537,19 @@ ResultCode SVC::QueryMemory(MemoryInfo* memory_info, PageInfo* page_info, u32 ad
 
 /// Create an event
 ResultCode SVC::CreateEvent(Handle* out_handle, u32 reset_type) {
-    std::shared_ptr<Event> evt =
-        kernel.CreateEvent(static_cast<ResetType>(reset_type),
-                           fmt::format("event-{:08x}", system.GetRunningCore().GetReg(14)));
-    CASCADE_RESULT(*out_handle, kernel.GetCurrentProcess()->handle_table.Create(std::move(evt)));
+    // Update event count in resource limit.
+    const auto current_process = kernel.GetCurrentProcess();
+    const auto& resource_limit = current_process->resource_limit;
+    if (!resource_limit->Reserve(ResourceLimitType::Event, 1)) {
+        return ResultCode(ErrCodes::OutOfEvents, ErrorModule::OS, ErrorSummary::OutOfResource,
+                          ErrorLevel::Status);
+    }
+
+    // Create event.
+    const auto name = fmt::format("event-{:08x}", system.GetRunningCore().GetReg(14));
+    const auto event = kernel.CreateEvent(static_cast<ResetType>(reset_type), name);
+    event->resource_limit = resource_limit;
+    CASCADE_RESULT(*out_handle, current_process->handle_table.Create(std::move(event)));
 
     LOG_TRACE(Kernel_SVC, "called reset_type=0x{:08X} : created handle=0x{:08X}", reset_type,
               *out_handle);
@@ -1505,10 +1590,19 @@ ResultCode SVC::ClearEvent(Handle handle) {
 
 /// Creates a timer
 ResultCode SVC::CreateTimer(Handle* out_handle, u32 reset_type) {
-    std::shared_ptr<Timer> timer =
-        kernel.CreateTimer(static_cast<ResetType>(reset_type),
-                           fmt ::format("timer-{:08x}", system.GetRunningCore().GetReg(14)));
-    CASCADE_RESULT(*out_handle, kernel.GetCurrentProcess()->handle_table.Create(std::move(timer)));
+    // Update timer count in resource limit.
+    const auto current_process = kernel.GetCurrentProcess();
+    const auto& resource_limit = current_process->resource_limit;
+    if (!resource_limit->Reserve(ResourceLimitType::Timer, 1)) {
+        return ResultCode(ErrCodes::OutOfTimers, ErrorModule::OS, ErrorSummary::OutOfResource,
+                          ErrorLevel::Status);
+    }
+
+    // Create timer.
+    const auto name = fmt::format("timer-{:08x}", system.GetRunningCore().GetReg(14));
+    const auto timer = kernel.CreateTimer(static_cast<ResetType>(reset_type), name);
+    timer->resource_limit = resource_limit;
+    CASCADE_RESULT(*out_handle, current_process->handle_table.Create(std::move(timer)));
 
     LOG_TRACE(Kernel_SVC, "called reset_type=0x{:08X} : created handle=0x{:08X}", reset_type,
               *out_handle);
@@ -1655,15 +1749,22 @@ ResultCode SVC::CreateMemoryBlock(Handle* out_handle, u32 addr, u32 size, u32 my
         return ERR_INVALID_ADDRESS;
     }
 
-    std::shared_ptr<Process> current_process = kernel.GetCurrentProcess();
+    // Update shared memory count in resource limit.
+    const auto current_process = kernel.GetCurrentProcess();
+    const auto& resource_limit = current_process->resource_limit;
+    if (!resource_limit->Reserve(ResourceLimitType::SharedMemory, 1)) {
+        return ResultCode(ErrCodes::OutOfSharedMems, ErrorModule::OS, ErrorSummary::OutOfResource,
+                          ErrorLevel::Status);
+    }
 
     // When trying to create a memory block with address = 0,
     // if the process has the Shared Device Memory flag in the exheader,
     // then we have to allocate from the same region as the caller process instead of the BASE
     // region.
     MemoryRegion region = MemoryRegion::BASE;
-    if (addr == 0 && current_process->flags.shared_device_mem)
+    if (addr == 0 && current_process->flags.shared_device_mem) {
         region = current_process->flags.memory_region;
+    }
 
     CASCADE_RESULT(shared_memory,
                    kernel.CreateSharedMemory(
@@ -2224,7 +2325,7 @@ const std::array<SVC::FunctionDef, 180> SVC::SVC_Table{{
     {0x76, &SVC::Wrap<&SVC::TerminateProcess>, "TerminateProcess"},
     {0x77, nullptr, "SetProcessResourceLimits"},
     {0x78, nullptr, "CreateResourceLimit"},
-    {0x79, nullptr, "SetResourceLimitValues"},
+    {0x79, &SVC::Wrap<&SVC::SetResourceLimitLimitValues>, "SetResourceLimitLimitValues"},
     {0x7A, nullptr, "AddCodeSegment"},
     {0x7B, nullptr, "Backdoor"},
     {0x7C, &SVC::Wrap<&SVC::KernelSetState>, "KernelSetState"},

src/core/hle/kernel/thread.cpp

@@ -16,6 +16,7 @@
 #include "core/hle/kernel/kernel.h"
 #include "core/hle/kernel/mutex.h"
 #include "core/hle/kernel/process.h"
+#include "core/hle/kernel/resource_limit.h"
 #include "core/hle/kernel/thread.h"
 #include "core/hle/result.h"
 #include "core/memory.h"
@@ -59,7 +60,12 @@ void Thread::Acquire(Thread* thread) {
 Thread::Thread(KernelSystem& kernel, u32 core_id)
     : WaitObject(kernel), core_id(core_id), thread_manager(kernel.GetThreadManager(core_id)) {}
 
-Thread::~Thread() = default;
+Thread::~Thread() {
+    auto process = owner_process.lock();
+    if (process) {
+        process->resource_limit->Release(ResourceLimitType::Thread, 1);
+    }
+}
 
 Thread* ThreadManager::GetCurrentThread() const {
     return current_thread.get();
@@ -342,7 +348,7 @@ ResultVal<std::shared_ptr<Thread>> KernelSystem::CreateThread(
                           ErrorSummary::InvalidArgument, ErrorLevel::Permanent);
     }
 
-    auto thread{std::make_shared<Thread>(*this, processor_id)};
+    auto thread = std::make_shared<Thread>(*this, processor_id);
 
     thread_managers[processor_id]->thread_list.push_back(thread);
     thread_managers[processor_id]->ready_queue.prepare(priority);

src/core/hle/kernel/timer.cpp

@@ -8,6 +8,8 @@
 #include "core/core.h"
 #include "core/hle/kernel/handle_table.h"
 #include "core/hle/kernel/object.h"
+#include "core/hle/kernel/process.h"
+#include "core/hle/kernel/resource_limit.h"
 #include "core/hle/kernel/thread.h"
 #include "core/hle/kernel/timer.h"
 
@@ -17,14 +19,17 @@ namespace Kernel {
 
 Timer::Timer(KernelSystem& kernel)
     : WaitObject(kernel), kernel(kernel), timer_manager(kernel.GetTimerManager()) {}
+
 Timer::~Timer() {
     Cancel();
     timer_manager.timer_callback_table.erase(callback_id);
+    if (resource_limit) {
+        resource_limit->Release(ResourceLimitType::Timer, 1);
+    }
 }
 
 std::shared_ptr<Timer> KernelSystem::CreateTimer(ResetType reset_type, std::string name) {
-    auto timer{std::make_shared<Timer>(*this)};
-
+    auto timer = std::make_shared<Timer>(*this);
     timer->reset_type = reset_type;
     timer->signaled = false;
     timer->name = std::move(name);
@@ -32,7 +37,6 @@ std::shared_ptr<Timer> KernelSystem::CreateTimer(ResetType reset_type, std::stri
     timer->interval_delay = 0;
     timer->callback_id = ++timer_manager->next_timer_callback_id;
     timer_manager->timer_callback_table[timer->callback_id] = timer.get();
-
     return timer;
 }
 

src/core/hle/kernel/timer.h

@@ -44,6 +44,8 @@ private:
     }
 };
 
+class ResourceLimit;
+
 class Timer final : public WaitObject {
 public:
     explicit Timer(KernelSystem& kernel);
@@ -96,6 +98,8 @@ public:
      */
     void Signal(s64 cycles_late);
 
+    std::shared_ptr<ResourceLimit> resource_limit;
+
 private:
     ResetType reset_type; ///< The ResetType of this timer
 
@@ -123,6 +127,7 @@ private:
         ar& signaled;
         ar& name;
         ar& callback_id;
+        ar& resource_limit;
     }
 };
 

src/core/hle/service/ac/ac.cpp

@@ -12,6 +12,7 @@
 #include "core/hle/ipc_helpers.h"
 #include "core/hle/kernel/event.h"
 #include "core/hle/kernel/handle_table.h"
+#include "core/hle/kernel/resource_limit.h"
 #include "core/hle/result.h"
 #include "core/hle/service/ac/ac.h"
 #include "core/hle/service/ac/ac_i.h"

src/core/hle/service/am/am.h

@@ -34,6 +34,10 @@ namespace Service::FS {
 enum class MediaType : u32;
 }
 
+namespace Kernel {
+class Mutex;
+}
+
 namespace Service::AM {
 
 namespace ErrCodes {

src/core/hle/service/boss/boss.h

@@ -8,6 +8,7 @@
 #include <boost/serialization/shared_ptr.hpp>
 #include "core/global.h"
 #include "core/hle/kernel/event.h"
+#include "core/hle/kernel/resource_limit.h"
 #include "core/hle/service/service.h"
 
 namespace Core {

src/core/hle/service/csnd/csnd_snd.cpp

@@ -6,6 +6,7 @@
 #include "common/archives.h"
 #include "core/core.h"
 #include "core/hle/ipc_helpers.h"
+#include "core/hle/kernel/resource_limit.h"
 #include "core/hle/result.h"
 #include "core/hle/service/csnd/csnd_snd.h"
 

src/core/hle/service/ldr_ro/cro_helper.cpp

@@ -16,7 +16,7 @@ static const ResultCode ERROR_BUFFER_TOO_SMALL = // 0xE0E12C1F
     ResultCode(static_cast<ErrorDescription>(31), ErrorModule::RO, ErrorSummary::InvalidArgument,
                ErrorLevel::Usage);
 
-static ResultCode CROFormatError(u32 description) {
+static constexpr ResultCode CROFormatError(u32 description) {
     return ResultCode(static_cast<ErrorDescription>(description), ErrorModule::RO,
                       ErrorSummary::WrongArgument, ErrorLevel::Permanent);
 }

src/core/hle/service/sm/srv.cpp

@@ -17,6 +17,7 @@
 #include "core/hle/kernel/errors.h"
 #include "core/hle/kernel/event.h"
 #include "core/hle/kernel/hle_ipc.h"
+#include "core/hle/kernel/resource_limit.h"
 #include "core/hle/kernel/semaphore.h"
 #include "core/hle/kernel/server_port.h"
 #include "core/hle/kernel/server_session.h"

src/core/loader/3dsx.cpp

@@ -277,7 +277,7 @@ ResultStatus AppLoader_THREEDSX::Load(std::shared_ptr<Kernel::Process>& process)
 
     // Attach the default resource limit (APPLICATION) to the process
     process->resource_limit = Core::System::GetInstance().Kernel().ResourceLimit().GetForCategory(
-        Kernel::ResourceLimitCategory::APPLICATION);
+        Kernel::ResourceLimitCategory::Application);
 
     // On real HW this is done with FS:Reg, but we can be lazy
     auto fs_user =

src/core/loader/elf.cpp

@@ -388,7 +388,7 @@ ResultStatus AppLoader_ELF::Load(std::shared_ptr<Kernel::Process>& process) {
 
     // Attach the default resource limit (APPLICATION) to the process
     process->resource_limit = Core::System::GetInstance().Kernel().ResourceLimit().GetForCategory(
-        Kernel::ResourceLimitCategory::APPLICATION);
+        Kernel::ResourceLimitCategory::Application);
 
     process->Run(48, Kernel::DEFAULT_STACK_SIZE);
 

src/core/loader/ncch.cpp

@@ -3,12 +3,11 @@
 // Refer to the license.txt file included.
 
 #include <algorithm>
-#include <codecvt>
 #include <cstring>
-#include <locale>
 #include <memory>
 #include <vector>
 #include <fmt/format.h>
+#include "common/literals.h"
 #include "common/logging/log.h"
 #include "common/settings.h"
 #include "common/string_util.h"
@@ -32,6 +31,7 @@
 
 namespace Loader {
 
+using namespace Common::Literals;
 static const u64 UPDATE_MASK = 0x0000000e00000000;
 
 FileType AppLoader_NCCH::IdentifyType(FileUtil::IOFile& file) {
@@ -148,13 +148,41 @@ ResultStatus AppLoader_NCCH::LoadExec(std::shared_ptr<Kernel::Process>& process)
         codeset->entrypoint = codeset->CodeSegment().addr;
         codeset->memory = std::move(code);
 
-        process = Core::System::GetInstance().Kernel().CreateProcess(std::move(codeset));
+        auto& system = Core::System::GetInstance();
+        process = system.Kernel().CreateProcess(std::move(codeset));
 
         // Attach a resource limit to the process based on the resource limit category
-        process->resource_limit =
-            Core::System::GetInstance().Kernel().ResourceLimit().GetForCategory(
-                static_cast<Kernel::ResourceLimitCategory>(
-                    overlay_ncch->exheader_header.arm11_system_local_caps.resource_limit_category));
+        const auto category = static_cast<Kernel::ResourceLimitCategory>(
+            overlay_ncch->exheader_header.arm11_system_local_caps.resource_limit_category);
+        process->resource_limit = system.Kernel().ResourceLimit().GetForCategory(category);
+
+        // When running N3DS-unaware titles pm will lie about the amount of memory available.
+        // This means RESLIMIT_COMMIT = APPMEMALLOC doesn't correspond to the actual size of
+        // APPLICATION. See:
+        // https://github.com/LumaTeam/Luma3DS/blob/e2778a45/sysmodules/pm/source/launch.c#L237
+        auto& ncch_caps = overlay_ncch->exheader_header.arm11_system_local_caps;
+        const auto o3ds_mode = static_cast<Kernel::MemoryMode>(ncch_caps.system_mode.Value());
+        const auto n3ds_mode = static_cast<Kernel::New3dsMemoryMode>(ncch_caps.n3ds_mode);
+        const bool is_new_3ds = Settings::values.is_new_3ds.GetValue();
+        if (is_new_3ds && n3ds_mode == Kernel::New3dsMemoryMode::Legacy &&
+            category == Kernel::ResourceLimitCategory::Application) {
+            u64 new_limit = 0;
+            switch (o3ds_mode) {
+            case Kernel::MemoryMode::Prod:
+                new_limit = 64_MiB;
+                break;
+            case Kernel::MemoryMode::Dev1:
+                new_limit = 96_MiB;
+                break;
+            case Kernel::MemoryMode::Dev2:
+                new_limit = 80_MiB;
+                break;
+            default:
+                break;
+            }
+            process->resource_limit->SetLimitValue(Kernel::ResourceLimitType::Commit,
+                                                   static_cast<s32>(new_limit));
+        }
 
         // Set the default CPU core for this process
         process->ideal_processor =
@@ -171,9 +199,7 @@ ResultStatus AppLoader_NCCH::LoadExec(std::shared_ptr<Kernel::Process>& process)
         u32 stack_size = overlay_ncch->exheader_header.codeset_info.stack_size;
 
         // On real HW this is done with FS:Reg, but we can be lazy
-        auto fs_user =
-            Core::System::GetInstance().ServiceManager().GetService<Service::FS::FS_USER>(
-                "fs:USER");
+        auto fs_user = system.ServiceManager().GetService<Service::FS::FS_USER>("fs:USER");
         fs_user->RegisterProgramInfo(process->process_id, process->codeset->program_id, filepath);
 
         Service::FS::FS_USER::ProductInfo product_info{};