1 files changed, 282 insertions, 0 deletions
diff --git a/src/core/hle/kernel/svc/svc_info.cpp b/src/core/hle/kernel/svc/svc_info.cpp
new file mode 100644
index 000000000..df5dd85a4
--- /dev/null
+++ b/src/core/hle/kernel/svc/svc_info.cpp
@@ -0,0 +1,282 @@
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "core/core.h"
+#include "core/core_timing.h"
+#include "core/hle/kernel/k_process.h"
+#include "core/hle/kernel/k_resource_limit.h"
+#include "core/hle/kernel/svc.h"
+
+namespace Kernel::Svc {
+
+/// Gets system/memory information for the current process
+Result GetInfo(Core::System& system, u64* result, u64 info_id, Handle handle, u64 info_sub_id) {
+    LOG_TRACE(Kernel_SVC, "called info_id=0x{:X}, info_sub_id=0x{:X}, handle=0x{:08X}", info_id,
+              info_sub_id, handle);
+
+    const auto info_id_type = static_cast<InfoType>(info_id);
+
+    switch (info_id_type) {
+    case InfoType::CoreMask:
+    case InfoType::PriorityMask:
+    case InfoType::AliasRegionAddress:
+    case InfoType::AliasRegionSize:
+    case InfoType::HeapRegionAddress:
+    case InfoType::HeapRegionSize:
+    case InfoType::AslrRegionAddress:
+    case InfoType::AslrRegionSize:
+    case InfoType::StackRegionAddress:
+    case InfoType::StackRegionSize:
+    case InfoType::TotalMemorySize:
+    case InfoType::UsedMemorySize:
+    case InfoType::SystemResourceSizeTotal:
+    case InfoType::SystemResourceSizeUsed:
+    case InfoType::ProgramId:
+    case InfoType::UserExceptionContextAddress:
+    case InfoType::TotalNonSystemMemorySize:
+    case InfoType::UsedNonSystemMemorySize:
+    case InfoType::IsApplication:
+    case InfoType::FreeThreadCount: {
+        if (info_sub_id != 0) {
+            LOG_ERROR(Kernel_SVC, "Info sub id is non zero! info_id={}, info_sub_id={}", info_id,
+                      info_sub_id);
+            return ResultInvalidEnumValue;
+        }
+
+        const auto& handle_table = system.Kernel().CurrentProcess()->GetHandleTable();
+        KScopedAutoObject process = handle_table.GetObject<KProcess>(handle);
+        if (process.IsNull()) {
+            LOG_ERROR(Kernel_SVC, "Process is not valid! info_id={}, info_sub_id={}, handle={:08X}",
+                      info_id, info_sub_id, handle);
+            return ResultInvalidHandle;
+        }
+
+        switch (info_id_type) {
+        case InfoType::CoreMask:
+            *result = process->GetCoreMask();
+            return ResultSuccess;
+
+        case InfoType::PriorityMask:
+            *result = process->GetPriorityMask();
+            return ResultSuccess;
+
+        case InfoType::AliasRegionAddress:
+            *result = process->PageTable().GetAliasRegionStart();
+            return ResultSuccess;
+
+        case InfoType::AliasRegionSize:
+            *result = process->PageTable().GetAliasRegionSize();
+            return ResultSuccess;
+
+        case InfoType::HeapRegionAddress:
+            *result = process->PageTable().GetHeapRegionStart();
+            return ResultSuccess;
+
+        case InfoType::HeapRegionSize:
+            *result = process->PageTable().GetHeapRegionSize();
+            return ResultSuccess;
+
+        case InfoType::AslrRegionAddress:
+            *result = process->PageTable().GetAliasCodeRegionStart();
+            return ResultSuccess;
+
+        case InfoType::AslrRegionSize:
+            *result = process->PageTable().GetAliasCodeRegionSize();
+            return ResultSuccess;
+
+        case InfoType::StackRegionAddress:
+            *result = process->PageTable().GetStackRegionStart();
+            return ResultSuccess;
+
+        case InfoType::StackRegionSize:
+            *result = process->PageTable().GetStackRegionSize();
+            return ResultSuccess;
+
+        case InfoType::TotalMemorySize:
+            *result = process->GetTotalPhysicalMemoryAvailable();
+            return ResultSuccess;
+
+        case InfoType::UsedMemorySize:
+            *result = process->GetTotalPhysicalMemoryUsed();
+            return ResultSuccess;
+
+        case InfoType::SystemResourceSizeTotal:
+            *result = process->GetSystemResourceSize();
+            return ResultSuccess;
+
+        case InfoType::SystemResourceSizeUsed:
+            LOG_WARNING(Kernel_SVC, "(STUBBED) Attempted to query system resource usage");
+            *result = process->GetSystemResourceUsage();
+            return ResultSuccess;
+
+        case InfoType::ProgramId:
+            *result = process->GetProgramID();
+            return ResultSuccess;
+
+        case InfoType::UserExceptionContextAddress:
+            *result = process->GetProcessLocalRegionAddress();
+            return ResultSuccess;
+
+        case InfoType::TotalNonSystemMemorySize:
+            *result = process->GetTotalPhysicalMemoryAvailableWithoutSystemResource();
+            return ResultSuccess;
+
+        case InfoType::UsedNonSystemMemorySize:
+            *result = process->GetTotalPhysicalMemoryUsedWithoutSystemResource();
+            return ResultSuccess;
+
+        case InfoType::FreeThreadCount:
+            *result = process->GetFreeThreadCount();
+            return ResultSuccess;
+
+        default:
+            break;
+        }
+
+        LOG_ERROR(Kernel_SVC, "Unimplemented svcGetInfo id=0x{:016X}", info_id);
+        return ResultInvalidEnumValue;
+    }
+
+    case InfoType::DebuggerAttached:
+        *result = 0;
+        return ResultSuccess;
+
+    case InfoType::ResourceLimit: {
+        if (handle != 0) {
+            LOG_ERROR(Kernel, "Handle is non zero! handle={:08X}", handle);
+            return ResultInvalidHandle;
+        }
+
+        if (info_sub_id != 0) {
+            LOG_ERROR(Kernel, "Info sub id is non zero! info_id={}, info_sub_id={}", info_id,
+                      info_sub_id);
+            return ResultInvalidCombination;
+        }
+
+        KProcess* const current_process = system.Kernel().CurrentProcess();
+        KHandleTable& handle_table = current_process->GetHandleTable();
+        const auto resource_limit = current_process->GetResourceLimit();
+        if (!resource_limit) {
+            *result = Svc::InvalidHandle;
+            // Yes, the kernel considers this a successful operation.
+            return ResultSuccess;
+        }
+
+        Handle resource_handle{};
+        R_TRY(handle_table.Add(&resource_handle, resource_limit));
+
+        *result = resource_handle;
+        return ResultSuccess;
+    }
+
+    case InfoType::RandomEntropy:
+        if (handle != 0) {
+            LOG_ERROR(Kernel_SVC, "Process Handle is non zero, expected 0 result but got {:016X}",
+                      handle);
+            return ResultInvalidHandle;
+        }
+
+        if (info_sub_id >= KProcess::RANDOM_ENTROPY_SIZE) {
+            LOG_ERROR(Kernel_SVC, "Entropy size is out of range, expected {} but got {}",
+                      KProcess::RANDOM_ENTROPY_SIZE, info_sub_id);
+            return ResultInvalidCombination;
+        }
+
+        *result = system.Kernel().CurrentProcess()->GetRandomEntropy(info_sub_id);
+        return ResultSuccess;
+
+    case InfoType::InitialProcessIdRange:
+        LOG_WARNING(Kernel_SVC,
+                    "(STUBBED) Attempted to query privileged process id bounds, returned 0");
+        *result = 0;
+        return ResultSuccess;
+
+    case InfoType::ThreadTickCount: {
+        constexpr u64 num_cpus = 4;
+        if (info_sub_id != 0xFFFFFFFFFFFFFFFF && info_sub_id >= num_cpus) {
+            LOG_ERROR(Kernel_SVC, "Core count is out of range, expected {} but got {}", num_cpus,
+                      info_sub_id);
+            return ResultInvalidCombination;
+        }
+
+        KScopedAutoObject thread =
+            system.Kernel().CurrentProcess()->GetHandleTable().GetObject<KThread>(
+                static_cast<Handle>(handle));
+        if (thread.IsNull()) {
+            LOG_ERROR(Kernel_SVC, "Thread handle does not exist, handle=0x{:08X}",
+                      static_cast<Handle>(handle));
+            return ResultInvalidHandle;
+        }
+
+        const auto& core_timing = system.CoreTiming();
+        const auto& scheduler = *system.Kernel().CurrentScheduler();
+        const auto* const current_thread = GetCurrentThreadPointer(system.Kernel());
+        const bool same_thread = current_thread == thread.GetPointerUnsafe();
+
+        const u64 prev_ctx_ticks = scheduler.GetLastContextSwitchTime();
+        u64 out_ticks = 0;
+        if (same_thread && info_sub_id == 0xFFFFFFFFFFFFFFFF) {
+            const u64 thread_ticks = current_thread->GetCpuTime();
+
+            out_ticks = thread_ticks + (core_timing.GetCPUTicks() - prev_ctx_ticks);
+        } else if (same_thread && info_sub_id == system.Kernel().CurrentPhysicalCoreIndex()) {
+            out_ticks = core_timing.GetCPUTicks() - prev_ctx_ticks;
+        }
+
+        *result = out_ticks;
+        return ResultSuccess;
+    }
+    case InfoType::IdleTickCount: {
+        // Verify the input handle is invalid.
+        R_UNLESS(handle == InvalidHandle, ResultInvalidHandle);
+
+        // Verify the requested core is valid.
+        const bool core_valid =
+            (info_sub_id == 0xFFFFFFFFFFFFFFFF) ||
+            (info_sub_id == static_cast<u64>(system.Kernel().CurrentPhysicalCoreIndex()));
+        R_UNLESS(core_valid, ResultInvalidCombination);
+
+        // Get the idle tick count.
+        *result = system.Kernel().CurrentScheduler()->GetIdleThread()->GetCpuTime();
+        return ResultSuccess;
+    }
+    case InfoType::MesosphereCurrentProcess: {
+        // Verify the input handle is invalid.
+        R_UNLESS(handle == InvalidHandle, ResultInvalidHandle);
+
+        // Verify the sub-type is valid.
+        R_UNLESS(info_sub_id == 0, ResultInvalidCombination);
+
+        // Get the handle table.
+        KProcess* current_process = system.Kernel().CurrentProcess();
+        KHandleTable& handle_table = current_process->GetHandleTable();
+
+        // Get a new handle for the current process.
+        Handle tmp;
+        R_TRY(handle_table.Add(&tmp, current_process));
+
+        // Set the output.
+        *result = tmp;
+
+        // We succeeded.
+        return ResultSuccess;
+    }
+    default:
+        LOG_ERROR(Kernel_SVC, "Unimplemented svcGetInfo id=0x{:016X}", info_id);
+        return ResultInvalidEnumValue;
+    }
+}
+
+Result GetInfo32(Core::System& system, u32* result_low, u32* result_high, u32 sub_id_low,
+                 u32 info_id, u32 handle, u32 sub_id_high) {
+    const u64 sub_id{u64{sub_id_low} | (u64{sub_id_high} << 32)};
+    u64 res_value{};
+
+    const Result result{GetInfo(system, &res_value, info_id, handle, sub_id)};
+    *result_high = static_cast<u32>(res_value >> 32);
+    *result_low = static_cast<u32>(res_value & std::numeric_limits<u32>::max());
+
+    return result;
+}
+
+} // namespace Kernel::Svc