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+// Copyright 2018 yuzu emulator team
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+// Licensed under GPLv2 or any later version
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+// Refer to the license.txt file included.
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+
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+#include "common/bit_util.h"
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+#include "core/hle/kernel/errors.h"
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+#include "core/hle/kernel/handle_table.h"
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+#include "core/hle/kernel/process_capability.h"
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+#include "core/hle/kernel/vm_manager.h"
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+
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+namespace Kernel {
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+namespace {
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+
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+// clang-format off
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+
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+// Shift offsets for kernel capability types.
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+enum : u32 {
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+ CapabilityOffset_PriorityAndCoreNum = 3,
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+ CapabilityOffset_Syscall = 4,
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+ CapabilityOffset_MapPhysical = 6,
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+ CapabilityOffset_MapIO = 7,
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+ CapabilityOffset_Interrupt = 11,
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+ CapabilityOffset_ProgramType = 13,
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+ CapabilityOffset_KernelVersion = 14,
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+ CapabilityOffset_HandleTableSize = 15,
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+ CapabilityOffset_Debug = 16,
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+};
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+
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+// Combined mask of all parameters that may be initialized only once.
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+constexpr u32 InitializeOnceMask = (1U << CapabilityOffset_PriorityAndCoreNum) |
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+ (1U << CapabilityOffset_ProgramType) |
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+ (1U << CapabilityOffset_KernelVersion) |
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+ (1U << CapabilityOffset_HandleTableSize) |
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+ (1U << CapabilityOffset_Debug);
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+
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+// Packed kernel version indicating 10.4.0
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+constexpr u32 PackedKernelVersion = 0x520000;
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+
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+// Indicates possible types of capabilities that can be specified.
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+enum class CapabilityType : u32 {
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+ Unset = 0U,
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+ PriorityAndCoreNum = (1U << CapabilityOffset_PriorityAndCoreNum) - 1,
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+ Syscall = (1U << CapabilityOffset_Syscall) - 1,
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+ MapPhysical = (1U << CapabilityOffset_MapPhysical) - 1,
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+ MapIO = (1U << CapabilityOffset_MapIO) - 1,
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+ Interrupt = (1U << CapabilityOffset_Interrupt) - 1,
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+ ProgramType = (1U << CapabilityOffset_ProgramType) - 1,
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+ KernelVersion = (1U << CapabilityOffset_KernelVersion) - 1,
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+ HandleTableSize = (1U << CapabilityOffset_HandleTableSize) - 1,
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+ Debug = (1U << CapabilityOffset_Debug) - 1,
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+ Ignorable = 0xFFFFFFFFU,
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+};
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+
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+// clang-format on
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+
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+constexpr CapabilityType GetCapabilityType(u32 value) {
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+ return static_cast<CapabilityType>((~value & (value + 1)) - 1);
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+}
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+
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+u32 GetFlagBitOffset(CapabilityType type) {
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+ const auto value = static_cast<u32>(type);
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+ return static_cast<u32>(Common::BitSize<u32>() - Common::CountLeadingZeroes32(value));
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+}
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+
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+} // Anonymous namespace
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+
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+ResultCode ProcessCapabilities::InitializeForKernelProcess(const u32* capabilities,
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+ std::size_t num_capabilities,
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+ VMManager& vm_manager) {
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+ Clear();
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+
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+ // Allow all cores and priorities.
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+ core_mask = 0xF;
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+ priority_mask = 0xFFFFFFFFFFFFFFFF;
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+ kernel_version = PackedKernelVersion;
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+
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+ return ParseCapabilities(capabilities, num_capabilities, vm_manager);
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+}
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+
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+ResultCode ProcessCapabilities::InitializeForUserProcess(const u32* capabilities,
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+ std::size_t num_capabilities,
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+ VMManager& vm_manager) {
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+ Clear();
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+
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+ return ParseCapabilities(capabilities, num_capabilities, vm_manager);
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+}
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+
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+void ProcessCapabilities::InitializeForMetadatalessProcess() {
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+ // Allow all cores and priorities
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+ core_mask = 0xF;
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+ priority_mask = 0xFFFFFFFFFFFFFFFF;
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+ kernel_version = PackedKernelVersion;
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+
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+ // Allow all system calls and interrupts.
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+ svc_capabilities.set();
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+ interrupt_capabilities.set();
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+
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+ // Allow using the maximum possible amount of handles
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+ handle_table_size = static_cast<u32>(HandleTable::MAX_COUNT);
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+
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+ // Allow all debugging capabilities.
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+ is_debuggable = true;
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+ can_force_debug = true;
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+}
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+
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+ResultCode ProcessCapabilities::ParseCapabilities(const u32* capabilities,
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+ std::size_t num_capabilities,
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+ VMManager& vm_manager) {
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+ u32 set_flags = 0;
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+ u32 set_svc_bits = 0;
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+
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+ for (std::size_t i = 0; i < num_capabilities; ++i) {
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+ const u32 descriptor = capabilities[i];
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+ const auto type = GetCapabilityType(descriptor);
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+
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+ if (type == CapabilityType::MapPhysical) {
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+ i++;
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+
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+ // The MapPhysical type uses two descriptor flags for its parameters.
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+ // If there's only one, then there's a problem.
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+ if (i >= num_capabilities) {
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+ return ERR_INVALID_COMBINATION;
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+ }
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+
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+ const auto size_flags = capabilities[i];
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+ if (GetCapabilityType(size_flags) != CapabilityType::MapPhysical) {
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+ return ERR_INVALID_COMBINATION;
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+ }
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+
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+ const auto result = HandleMapPhysicalFlags(descriptor, size_flags, vm_manager);
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+ if (result.IsError()) {
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+ return result;
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+ }
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+ } else {
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+ const auto result =
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+ ParseSingleFlagCapability(set_flags, set_svc_bits, descriptor, vm_manager);
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+ if (result.IsError()) {
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+ return result;
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+ }
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+ }
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+ }
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+
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+ return RESULT_SUCCESS;
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+}
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+
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+ResultCode ProcessCapabilities::ParseSingleFlagCapability(u32& set_flags, u32& set_svc_bits,
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+ u32 flag, VMManager& vm_manager) {
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+ const auto type = GetCapabilityType(flag);
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+
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+ if (type == CapabilityType::Unset) {
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+ return ERR_INVALID_CAPABILITY_DESCRIPTOR;
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+ }
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+
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+ // Bail early on ignorable entries, as one would expect,
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+ // ignorable descriptors can be ignored.
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+ if (type == CapabilityType::Ignorable) {
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+ return RESULT_SUCCESS;
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+ }
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+
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+ // Ensure that the give flag hasn't already been initialized before.
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+ // If it has been, then bail.
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+ const u32 flag_length = GetFlagBitOffset(type);
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+ const u32 set_flag = 1U << flag_length;
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+ if ((set_flag & set_flags & InitializeOnceMask) != 0) {
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+ return ERR_INVALID_COMBINATION;
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+ }
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+ set_flags |= set_flag;
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+
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+ switch (type) {
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+ case CapabilityType::PriorityAndCoreNum:
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+ return HandlePriorityCoreNumFlags(flag);
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+ case CapabilityType::Syscall:
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+ return HandleSyscallFlags(set_svc_bits, flag);
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+ case CapabilityType::MapIO:
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+ return HandleMapIOFlags(flag, vm_manager);
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+ case CapabilityType::Interrupt:
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+ return HandleInterruptFlags(flag);
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+ case CapabilityType::ProgramType:
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+ return HandleProgramTypeFlags(flag);
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+ case CapabilityType::KernelVersion:
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+ return HandleKernelVersionFlags(flag);
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+ case CapabilityType::HandleTableSize:
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+ return HandleHandleTableFlags(flag);
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+ case CapabilityType::Debug:
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+ return HandleDebugFlags(flag);
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+ default:
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+ break;
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+ }
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+
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+ return ERR_INVALID_CAPABILITY_DESCRIPTOR;
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+}
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+
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+void ProcessCapabilities::Clear() {
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+ svc_capabilities.reset();
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+ interrupt_capabilities.reset();
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+
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+ core_mask = 0;
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+ priority_mask = 0;
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+
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+ handle_table_size = 0;
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+ kernel_version = 0;
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+
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+ program_type = ProgramType::SysModule;
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+
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+ is_debuggable = false;
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+ can_force_debug = false;
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+}
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+
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+ResultCode ProcessCapabilities::HandlePriorityCoreNumFlags(u32 flags) {
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+ if (priority_mask != 0 || core_mask != 0) {
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+ return ERR_INVALID_CAPABILITY_DESCRIPTOR;
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+ }
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+
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+ const u32 core_num_min = (flags >> 16) & 0xFF;
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+ const u32 core_num_max = (flags >> 24) & 0xFF;
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+ if (core_num_min > core_num_max) {
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+ return ERR_INVALID_COMBINATION;
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+ }
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+
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+ const u32 priority_min = (flags >> 10) & 0x3F;
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+ const u32 priority_max = (flags >> 4) & 0x3F;
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+ if (priority_min > priority_max) {
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+ return ERR_INVALID_COMBINATION;
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+ }
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+
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+ // The switch only has 4 usable cores.
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+ if (core_num_max >= 4) {
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+ return ERR_INVALID_PROCESSOR_ID;
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+ }
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+
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+ const auto make_mask = [](u64 min, u64 max) {
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+ const u64 range = max - min + 1;
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+ const u64 mask = (1ULL << range) - 1;
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+
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+ return mask << min;
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+ };
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+
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+ core_mask = make_mask(core_num_min, core_num_max);
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+ priority_mask = make_mask(priority_min, priority_max);
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+ return RESULT_SUCCESS;
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+}
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+
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+ResultCode ProcessCapabilities::HandleSyscallFlags(u32& set_svc_bits, u32 flags) {
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+ const u32 index = flags >> 29;
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+ const u32 svc_bit = 1U << index;
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+
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+ // If we've already set this svc before, bail.
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+ if ((set_svc_bits & svc_bit) != 0) {
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+ return ERR_INVALID_COMBINATION;
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+ }
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+ set_svc_bits |= svc_bit;
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+
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+ const u32 svc_mask = (flags >> 5) & 0xFFFFFF;
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+ for (u32 i = 0; i < 24; ++i) {
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+ const u32 svc_number = index * 24 + i;
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+
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+ if ((svc_mask & (1U << i)) == 0) {
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+ continue;
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+ }
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+
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+ if (svc_number >= svc_capabilities.size()) {
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+ return ERR_OUT_OF_RANGE;
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+ }
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+
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+ svc_capabilities[svc_number] = true;
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+ }
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+
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+ return RESULT_SUCCESS;
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+}
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+
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+ResultCode ProcessCapabilities::HandleMapPhysicalFlags(u32 flags, u32 size_flags,
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+ VMManager& vm_manager) {
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+ // TODO(Lioncache): Implement once the memory manager can handle this.
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+ return RESULT_SUCCESS;
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+}
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+
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+ResultCode ProcessCapabilities::HandleMapIOFlags(u32 flags, VMManager& vm_manager) {
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+ // TODO(Lioncache): Implement once the memory manager can handle this.
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+ return RESULT_SUCCESS;
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+}
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+
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+ResultCode ProcessCapabilities::HandleInterruptFlags(u32 flags) {
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+ constexpr u32 interrupt_ignore_value = 0x3FF;
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+ const u32 interrupt0 = (flags >> 12) & 0x3FF;
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+ const u32 interrupt1 = (flags >> 22) & 0x3FF;
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+
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+ for (u32 interrupt : {interrupt0, interrupt1}) {
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+ if (interrupt == interrupt_ignore_value) {
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+ continue;
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+ }
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+
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+ // NOTE:
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+ // This should be checking a generic interrupt controller value
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+ // as part of the calculation, however, given we don't currently
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+ // emulate that, it's sufficient to mark every interrupt as defined.
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+
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+ if (interrupt >= interrupt_capabilities.size()) {
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+ return ERR_OUT_OF_RANGE;
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+ }
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+
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+ interrupt_capabilities[interrupt] = true;
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+ }
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+
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+ return RESULT_SUCCESS;
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+}
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+
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+ResultCode ProcessCapabilities::HandleProgramTypeFlags(u32 flags) {
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+ const u32 reserved = flags >> 17;
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+ if (reserved != 0) {
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+ return ERR_RESERVED_VALUE;
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+ }
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+
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+ program_type = static_cast<ProgramType>((flags >> 14) & 0b111);
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+ return RESULT_SUCCESS;
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+}
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+
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+ResultCode ProcessCapabilities::HandleKernelVersionFlags(u32 flags) {
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+ // Yes, the internal member variable is checked in the actual kernel here.
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+ // This might look odd for options that are only allowed to be initialized
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+ // just once, however the kernel has a separate initialization function for
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+ // kernel processes and userland processes. The kernel variant sets this
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+ // member variable ahead of time.
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+
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+ const u32 major_version = kernel_version >> 19;
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+
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+ if (major_version != 0 || flags < 0x80000) {
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+ return ERR_INVALID_CAPABILITY_DESCRIPTOR;
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+ }
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+
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+ kernel_version = flags;
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+ return RESULT_SUCCESS;
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+}
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+
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+ResultCode ProcessCapabilities::HandleHandleTableFlags(u32 flags) {
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+ const u32 reserved = flags >> 26;
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+ if (reserved != 0) {
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+ return ERR_RESERVED_VALUE;
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+ }
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+
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+ handle_table_size = (flags >> 16) & 0x3FF;
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+ return RESULT_SUCCESS;
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+}
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+
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+ResultCode ProcessCapabilities::HandleDebugFlags(u32 flags) {
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+ const u32 reserved = flags >> 19;
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+ if (reserved != 0) {
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+ return ERR_RESERVED_VALUE;
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+ }
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+
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+ is_debuggable = (flags & 0x20000) != 0;
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+ can_force_debug = (flags & 0x40000) != 0;
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+ return RESULT_SUCCESS;
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+}
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+
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+} // namespace Kernel
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bunnei