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Merge pull request #1928 from lioncash/caps

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kernel: Handle kernel capability descriptors
This commit is contained in:
bunnei 2018-12-27 11:15:34 -05:00 • committed by GitHub
commit 795335af0f
WARNING! Although there is a key with this ID in the database it does not verify this commit! This commit is SUSPICIOUS.
GPG key ID: 4AEE18F83AFDEB23
14 changed files with 732 additions and 125 deletions
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2
src/core/hle/kernel/errors.h
View file

@ -11,6 +11,7 @@ namespace Kernel {
// Confirmed Switch kernel error codes
constexpr ResultCode ERR_MAX_CONNECTIONS_REACHED{ErrorModule::Kernel, 7};
constexpr ResultCode ERR_INVALID_CAPABILITY_DESCRIPTOR{ErrorModule::Kernel, 14};
constexpr ResultCode ERR_INVALID_SIZE{ErrorModule::Kernel, 101};
constexpr ResultCode ERR_INVALID_ADDRESS{ErrorModule::Kernel, 102};
constexpr ResultCode ERR_HANDLE_TABLE_FULL{ErrorModule::Kernel, 105};
@ -30,6 +31,7 @@ constexpr ResultCode ERR_NOT_FOUND{ErrorModule::Kernel, 121};
constexpr ResultCode ERR_BUSY{ErrorModule::Kernel, 122};
constexpr ResultCode ERR_SESSION_CLOSED_BY_REMOTE{ErrorModule::Kernel, 123};
constexpr ResultCode ERR_INVALID_STATE{ErrorModule::Kernel, 125};
constexpr ResultCode ERR_RESERVED_VALUE{ErrorModule::Kernel, 126};
constexpr ResultCode ERR_RESOURCE_LIMIT_EXCEEDED{ErrorModule::Kernel, 132};
} // namespace Kernel

6
src/core/hle/kernel/handle_table.h
View file

@ -43,6 +43,9 @@ enum KernelHandle : Handle {
*/
class HandleTable final : NonCopyable {
public:
/// This is the maximum limit of handles allowed per process in Horizon
static constexpr std::size_t MAX_COUNT = 1024;
HandleTable();
~HandleTable();
@ -91,9 +94,6 @@ public:
void Clear();
private:
/// This is the maximum limit of handles allowed per process in Horizon
static constexpr std::size_t MAX_COUNT = 1024;
/// Stores the Object referenced by the handle or null if the slot is empty.
std::array<SharedPtr<Object>, MAX_COUNT> objects;

80
src/core/hle/kernel/process.cpp
View file

@ -28,13 +28,11 @@ SharedPtr<Process> Process::Create(KernelCore& kernel, std::string&& name) {
SharedPtr<Process> process(new Process(kernel));
process->name = std::move(name);
process->flags.raw = 0;
process->flags.memory_region.Assign(MemoryRegion::APPLICATION);
process->resource_limit = kernel.GetSystemResourceLimit();
process->status = ProcessStatus::Created;
process->program_id = 0;
process->process_id = kernel.CreateNewProcessID();
process->svc_access_mask.set();
process->capabilities.InitializeForMetadatalessProcess();
std::mt19937 rng(Settings::values.rng_seed.value_or(0));
std::uniform_int_distribution<u64> distribution;
@ -64,83 +62,15 @@ ResultCode Process::ClearSignalState() {
return RESULT_SUCCESS;
}
void Process::LoadFromMetadata(const FileSys::ProgramMetadata& metadata) {
ResultCode Process::LoadFromMetadata(const FileSys::ProgramMetadata& metadata) {
program_id = metadata.GetTitleID();
ideal_processor = metadata.GetMainThreadCore();
is_64bit_process = metadata.Is64BitProgram();
vm_manager.Reset(metadata.GetAddressSpaceType());
}
void Process::ParseKernelCaps(const u32* kernel_caps, std::size_t len) {
for (std::size_t i = 0; i < len; ++i) {
u32 descriptor = kernel_caps[i];
u32 type = descriptor >> 20;
if (descriptor == 0xFFFFFFFF) {
// Unused descriptor entry
continue;
} else if ((type & 0xF00) == 0xE00) { // 0x0FFF
// Allowed interrupts list
LOG_WARNING(Loader, "ExHeader allowed interrupts list ignored");
} else if ((type & 0xF80) == 0xF00) { // 0x07FF
// Allowed syscalls mask
unsigned int index = ((descriptor >> 24) & 7) * 24;
u32 bits = descriptor & 0xFFFFFF;
while (bits && index < svc_access_mask.size()) {
svc_access_mask.set(index, bits & 1);
++index;
bits >>= 1;
}
} else if ((type & 0xFF0) == 0xFE0) { // 0x00FF
// Handle table size
handle_table_size = descriptor & 0x3FF;
} else if ((type & 0xFF8) == 0xFF0) { // 0x007F
// Misc. flags
flags.raw = descriptor & 0xFFFF;
} else if ((type & 0xFFE) == 0xFF8) { // 0x001F
// Mapped memory range
if (i + 1 >= len || ((kernel_caps[i + 1] >> 20) & 0xFFE) != 0xFF8) {
LOG_WARNING(Loader, "Incomplete exheader memory range descriptor ignored.");
continue;
}
u32 end_desc = kernel_caps[i + 1];
++i; // Skip over the second descriptor on the next iteration
AddressMapping mapping;
mapping.address = descriptor << 12;
VAddr end_address = end_desc << 12;
if (mapping.address < end_address) {
mapping.size = end_address - mapping.address;
} else {
mapping.size = 0;
}
mapping.read_only = (descriptor & (1 << 20)) != 0;
mapping.unk_flag = (end_desc & (1 << 20)) != 0;
address_mappings.push_back(mapping);
} else if ((type & 0xFFF) == 0xFFE) { // 0x000F
// Mapped memory page
AddressMapping mapping;
mapping.address = descriptor << 12;
mapping.size = Memory::PAGE_SIZE;
mapping.read_only = false;
mapping.unk_flag = false;
address_mappings.push_back(mapping);
} else if ((type & 0xFE0) == 0xFC0) { // 0x01FF
// Kernel version
kernel_version = descriptor & 0xFFFF;
int minor = kernel_version & 0xFF;
int major = (kernel_version >> 8) & 0xFF;
LOG_INFO(Loader, "ExHeader kernel version: {}.{}", major, minor);
} else {
LOG_ERROR(Loader, "Unhandled kernel caps descriptor: 0x{:08X}", descriptor);
}
}
const auto& caps = metadata.GetKernelCapabilities();
return capabilities.InitializeForUserProcess(caps.data(), caps.size(), vm_manager);
}
void Process::Run(VAddr entry_point, s32 main_thread_priority, u32 stack_size) {

58
src/core/hle/kernel/process.h
View file

@ -11,9 +11,9 @@
#include <string>
#include <vector>
#include <boost/container/static_vector.hpp>
#include "common/bit_field.h"
#include "common/common_types.h"
#include "core/hle/kernel/handle_table.h"
#include "core/hle/kernel/process_capability.h"
#include "core/hle/kernel/thread.h"
#include "core/hle/kernel/vm_manager.h"
#include "core/hle/kernel/wait_object.h"
@ -42,24 +42,6 @@ enum class MemoryRegion : u16 {
BASE = 3,
};
union ProcessFlags {
u16 raw;
BitField<0, 1, u16>
allow_debug; ///< Allows other processes to attach to and debug this process.
BitField<1, 1, u16> force_debug; ///< Allows this process to attach to processes even if they
/// don't have allow_debug set.
BitField<2, 1, u16> allow_nonalphanum;
BitField<3, 1, u16> shared_page_writable; ///< Shared page is mapped with write permissions.
BitField<4, 1, u16> privileged_priority; ///< Can use priority levels higher than 24.
BitField<5, 1, u16> allow_main_args;
BitField<6, 1, u16> shared_device_mem;
BitField<7, 1, u16> runnable_on_sleep;
BitField<8, 4, MemoryRegion>
memory_region; ///< Default region for memory allocations for this process
BitField<12, 1, u16> loaded_high; ///< Application loaded high (not at 0x00100000).
};
/**
* Indicates the status of a Process instance.
*
@ -192,13 +174,13 @@ public:
}
/// Gets the bitmask of allowed CPUs that this process' threads can run on.
u32 GetAllowedProcessorMask() const {
return allowed_processor_mask;
u64 GetAllowedProcessorMask() const {
return capabilities.GetCoreMask();
}
/// Gets the bitmask of allowed thread priorities.
u32 GetAllowedThreadPriorityMask() const {
return allowed_thread_priority_mask;
u64 GetAllowedThreadPriorityMask() const {
return capabilities.GetPriorityMask();
}
u32 IsVirtualMemoryEnabled() const {
@ -239,15 +221,12 @@ public:
* Loads process-specifics configuration info with metadata provided
* by an executable.
*
* @param metadata The provided metadata to load process specific info.
* @param metadata The provided metadata to load process specific info from.
*
* @returns RESULT_SUCCESS if all relevant metadata was able to be
* loaded and parsed. Otherwise, an error code is returned.
*/
void LoadFromMetadata(const FileSys::ProgramMetadata& metadata);
/**
* Parses a list of kernel capability descriptors (as found in the ExHeader) and applies them
* to this process.
*/
void ParseKernelCaps(const u32* kernel_caps, std::size_t len);
ResultCode LoadFromMetadata(const FileSys::ProgramMetadata& metadata);
/**
* Applies address space changes and launches the process main thread.
@ -308,22 +287,8 @@ private:
/// Resource limit descriptor for this process
SharedPtr<ResourceLimit> resource_limit;
/// The process may only call SVCs which have the corresponding bit set.
std::bitset<0x80> svc_access_mask;
/// Maximum size of the handle table for the process.
u32 handle_table_size = 0x200;
/// Special memory ranges mapped into this processes address space. This is used to give
/// processes access to specific I/O regions and device memory.
boost::container::static_vector<AddressMapping, 8> address_mappings;
ProcessFlags flags;
/// Kernel compatibility version for this process
u16 kernel_version = 0;
/// The default CPU for this process, threads are scheduled on this cpu by default.
u8 ideal_processor = 0;
/// Bitmask of allowed CPUs that this process' threads can run on. TODO(Subv): Actually parse
/// this value from the process header.
u32 allowed_processor_mask = THREADPROCESSORID_DEFAULT_MASK;
u32 allowed_thread_priority_mask = 0xFFFFFFFF;
u32 is_virtual_address_memory_enabled = 0;
/// The Thread Local Storage area is allocated as processes create threads,
@ -333,6 +298,9 @@ private:
/// This vector will grow as more pages are allocated for new threads.
std::vector<std::bitset<8>> tls_slots;
/// Contains the parsed process capability descriptors.
ProcessCapabilities capabilities;
/// Whether or not this process is AArch64, or AArch32.
/// By default, we currently assume this is true, unless otherwise
/// specified by metadata provided to the process during loading.

355
src/core/hle/kernel/process_capability.cpp Normal file
View file

@ -0,0 +1,355 @@
// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/bit_util.h"
#include "core/hle/kernel/errors.h"
#include "core/hle/kernel/handle_table.h"
#include "core/hle/kernel/process_capability.h"
#include "core/hle/kernel/vm_manager.h"
namespace Kernel {
namespace {
// clang-format off
// Shift offsets for kernel capability types.
enum : u32 {
CapabilityOffset_PriorityAndCoreNum = 3,
CapabilityOffset_Syscall = 4,
CapabilityOffset_MapPhysical = 6,
CapabilityOffset_MapIO = 7,
CapabilityOffset_Interrupt = 11,
CapabilityOffset_ProgramType = 13,
CapabilityOffset_KernelVersion = 14,
CapabilityOffset_HandleTableSize = 15,
CapabilityOffset_Debug = 16,
};
// Combined mask of all parameters that may be initialized only once.
constexpr u32 InitializeOnceMask = (1U << CapabilityOffset_PriorityAndCoreNum) |
(1U << CapabilityOffset_ProgramType) |
(1U << CapabilityOffset_KernelVersion) |
(1U << CapabilityOffset_HandleTableSize) |
(1U << CapabilityOffset_Debug);
// Packed kernel version indicating 10.4.0
constexpr u32 PackedKernelVersion = 0x520000;
// Indicates possible types of capabilities that can be specified.
enum class CapabilityType : u32 {
Unset = 0U,
PriorityAndCoreNum = (1U << CapabilityOffset_PriorityAndCoreNum) - 1,
Syscall = (1U << CapabilityOffset_Syscall) - 1,
MapPhysical = (1U << CapabilityOffset_MapPhysical) - 1,
MapIO = (1U << CapabilityOffset_MapIO) - 1,
Interrupt = (1U << CapabilityOffset_Interrupt) - 1,
ProgramType = (1U << CapabilityOffset_ProgramType) - 1,
KernelVersion = (1U << CapabilityOffset_KernelVersion) - 1,
HandleTableSize = (1U << CapabilityOffset_HandleTableSize) - 1,
Debug = (1U << CapabilityOffset_Debug) - 1,
Ignorable = 0xFFFFFFFFU,
};
// clang-format on
constexpr CapabilityType GetCapabilityType(u32 value) {
return static_cast<CapabilityType>((~value & (value + 1)) - 1);
}
u32 GetFlagBitOffset(CapabilityType type) {
const auto value = static_cast<u32>(type);
return static_cast<u32>(Common::BitSize<u32>() - Common::CountLeadingZeroes32(value));
}
} // Anonymous namespace
ResultCode ProcessCapabilities::InitializeForKernelProcess(const u32* capabilities,
std::size_t num_capabilities,
VMManager& vm_manager) {
Clear();
// Allow all cores and priorities.
core_mask = 0xF;
priority_mask = 0xFFFFFFFFFFFFFFFF;
kernel_version = PackedKernelVersion;
return ParseCapabilities(capabilities, num_capabilities, vm_manager);
}
ResultCode ProcessCapabilities::InitializeForUserProcess(const u32* capabilities,
std::size_t num_capabilities,
VMManager& vm_manager) {
Clear();
return ParseCapabilities(capabilities, num_capabilities, vm_manager);
}
void ProcessCapabilities::InitializeForMetadatalessProcess() {
// Allow all cores and priorities
core_mask = 0xF;
priority_mask = 0xFFFFFFFFFFFFFFFF;
kernel_version = PackedKernelVersion;
// Allow all system calls and interrupts.
svc_capabilities.set();
interrupt_capabilities.set();
// Allow using the maximum possible amount of handles
handle_table_size = static_cast<u32>(HandleTable::MAX_COUNT);
// Allow all debugging capabilities.
is_debuggable = true;
can_force_debug = true;
}
ResultCode ProcessCapabilities::ParseCapabilities(const u32* capabilities,
std::size_t num_capabilities,
VMManager& vm_manager) {
u32 set_flags = 0;
u32 set_svc_bits = 0;
for (std::size_t i = 0; i < num_capabilities; ++i) {
const u32 descriptor = capabilities[i];
const auto type = GetCapabilityType(descriptor);
if (type == CapabilityType::MapPhysical) {
i++;
// The MapPhysical type uses two descriptor flags for its parameters.
// If there's only one, then there's a problem.
if (i >= num_capabilities) {
return ERR_INVALID_COMBINATION;
}
const auto size_flags = capabilities[i];
if (GetCapabilityType(size_flags) != CapabilityType::MapPhysical) {
return ERR_INVALID_COMBINATION;
}
const auto result = HandleMapPhysicalFlags(descriptor, size_flags, vm_manager);
if (result.IsError()) {
return result;
}
} else {
const auto result =
ParseSingleFlagCapability(set_flags, set_svc_bits, descriptor, vm_manager);
if (result.IsError()) {
return result;
}
}
}
return RESULT_SUCCESS;
}
ResultCode ProcessCapabilities::ParseSingleFlagCapability(u32& set_flags, u32& set_svc_bits,
u32 flag, VMManager& vm_manager) {
const auto type = GetCapabilityType(flag);
if (type == CapabilityType::Unset) {
return ERR_INVALID_CAPABILITY_DESCRIPTOR;
}
// Bail early on ignorable entries, as one would expect,
// ignorable descriptors can be ignored.
if (type == CapabilityType::Ignorable) {
return RESULT_SUCCESS;
}
// Ensure that the give flag hasn't already been initialized before.
// If it has been, then bail.
const u32 flag_length = GetFlagBitOffset(type);
const u32 set_flag = 1U << flag_length;
if ((set_flag & set_flags & InitializeOnceMask) != 0) {
return ERR_INVALID_COMBINATION;
}
set_flags |= set_flag;
switch (type) {
case CapabilityType::PriorityAndCoreNum:
return HandlePriorityCoreNumFlags(flag);
case CapabilityType::Syscall:
return HandleSyscallFlags(set_svc_bits, flag);
case CapabilityType::MapIO:
return HandleMapIOFlags(flag, vm_manager);
case CapabilityType::Interrupt:
return HandleInterruptFlags(flag);
case CapabilityType::ProgramType:
return HandleProgramTypeFlags(flag);
case CapabilityType::KernelVersion:
return HandleKernelVersionFlags(flag);
case CapabilityType::HandleTableSize:
return HandleHandleTableFlags(flag);
case CapabilityType::Debug:
return HandleDebugFlags(flag);
default:
break;
}
return ERR_INVALID_CAPABILITY_DESCRIPTOR;
}
void ProcessCapabilities::Clear() {
svc_capabilities.reset();
interrupt_capabilities.reset();
core_mask = 0;
priority_mask = 0;
handle_table_size = 0;
kernel_version = 0;
program_type = ProgramType::SysModule;
is_debuggable = false;
can_force_debug = false;
}
ResultCode ProcessCapabilities::HandlePriorityCoreNumFlags(u32 flags) {
if (priority_mask != 0 || core_mask != 0) {
return ERR_INVALID_CAPABILITY_DESCRIPTOR;
}
const u32 core_num_min = (flags >> 16) & 0xFF;
const u32 core_num_max = (flags >> 24) & 0xFF;
if (core_num_min > core_num_max) {
return ERR_INVALID_COMBINATION;
}
const u32 priority_min = (flags >> 10) & 0x3F;
const u32 priority_max = (flags >> 4) & 0x3F;
if (priority_min > priority_max) {
return ERR_INVALID_COMBINATION;
}
// The switch only has 4 usable cores.
if (core_num_max >= 4) {
return ERR_INVALID_PROCESSOR_ID;
}
const auto make_mask = [](u64 min, u64 max) {
const u64 range = max - min + 1;
const u64 mask = (1ULL << range) - 1;
return mask << min;
};
core_mask = make_mask(core_num_min, core_num_max);
priority_mask = make_mask(priority_min, priority_max);
return RESULT_SUCCESS;
}
ResultCode ProcessCapabilities::HandleSyscallFlags(u32& set_svc_bits, u32 flags) {
const u32 index = flags >> 29;
const u32 svc_bit = 1U << index;
// If we've already set this svc before, bail.
if ((set_svc_bits & svc_bit) != 0) {
return ERR_INVALID_COMBINATION;
}
set_svc_bits |= svc_bit;
const u32 svc_mask = (flags >> 5) & 0xFFFFFF;
for (u32 i = 0; i < 24; ++i) {
const u32 svc_number = index * 24 + i;
if ((svc_mask & (1U << i)) == 0) {
continue;
}
if (svc_number >= svc_capabilities.size()) {
return ERR_OUT_OF_RANGE;
}
svc_capabilities[svc_number] = true;
}
return RESULT_SUCCESS;
}
ResultCode ProcessCapabilities::HandleMapPhysicalFlags(u32 flags, u32 size_flags,
VMManager& vm_manager) {
// TODO(Lioncache): Implement once the memory manager can handle this.
return RESULT_SUCCESS;
}
ResultCode ProcessCapabilities::HandleMapIOFlags(u32 flags, VMManager& vm_manager) {
// TODO(Lioncache): Implement once the memory manager can handle this.
return RESULT_SUCCESS;
}
ResultCode ProcessCapabilities::HandleInterruptFlags(u32 flags) {
constexpr u32 interrupt_ignore_value = 0x3FF;
const u32 interrupt0 = (flags >> 12) & 0x3FF;
const u32 interrupt1 = (flags >> 22) & 0x3FF;
for (u32 interrupt : {interrupt0, interrupt1}) {
if (interrupt == interrupt_ignore_value) {
continue;
}
// NOTE:
// This should be checking a generic interrupt controller value
// as part of the calculation, however, given we don't currently
// emulate that, it's sufficient to mark every interrupt as defined.
if (interrupt >= interrupt_capabilities.size()) {
return ERR_OUT_OF_RANGE;
}
interrupt_capabilities[interrupt] = true;
}
return RESULT_SUCCESS;
}
ResultCode ProcessCapabilities::HandleProgramTypeFlags(u32 flags) {
const u32 reserved = flags >> 17;
if (reserved != 0) {
return ERR_RESERVED_VALUE;
}
program_type = static_cast<ProgramType>((flags >> 14) & 0b111);
return RESULT_SUCCESS;
}
ResultCode ProcessCapabilities::HandleKernelVersionFlags(u32 flags) {
// Yes, the internal member variable is checked in the actual kernel here.
// This might look odd for options that are only allowed to be initialized
// just once, however the kernel has a separate initialization function for
// kernel processes and userland processes. The kernel variant sets this
// member variable ahead of time.
const u32 major_version = kernel_version >> 19;
if (major_version != 0 || flags < 0x80000) {
return ERR_INVALID_CAPABILITY_DESCRIPTOR;
}
kernel_version = flags;
return RESULT_SUCCESS;
}
ResultCode ProcessCapabilities::HandleHandleTableFlags(u32 flags) {
const u32 reserved = flags >> 26;
if (reserved != 0) {
return ERR_RESERVED_VALUE;
}
handle_table_size = (flags >> 16) & 0x3FF;
return RESULT_SUCCESS;
}
ResultCode ProcessCapabilities::HandleDebugFlags(u32 flags) {
const u32 reserved = flags >> 19;
if (reserved != 0) {
return ERR_RESERVED_VALUE;
}
is_debuggable = (flags & 0x20000) != 0;
can_force_debug = (flags & 0x40000) != 0;
return RESULT_SUCCESS;
}
} // namespace Kernel

264
src/core/hle/kernel/process_capability.h Normal file
View file

@ -0,0 +1,264 @@
// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <bitset>
#include "common/common_types.h"
union ResultCode;
namespace Kernel {
class VMManager;
/// The possible types of programs that may be indicated
/// by the program type capability descriptor.
enum class ProgramType {
SysModule,
Application,
Applet,
};
/// Handles kernel capability descriptors that are provided by
/// application metadata. These descriptors provide information
/// that alters certain parameters for kernel process instance
/// that will run said application (or applet).
///
/// Capabilities are a sequence of flag descriptors, that indicate various
/// configurations and constraints for a particular process.
///
/// Flag types are indicated by a sequence of set low bits. E.g. the
/// types are indicated with the low bits as follows (where x indicates "don't care"):
///
/// - Priority and core mask : 0bxxxxxxxxxxxx0111
/// - Allowed service call mask: 0bxxxxxxxxxxx01111
/// - Map physical memory : 0bxxxxxxxxx0111111
/// - Map IO memory : 0bxxxxxxxx01111111
/// - Interrupts : 0bxxxx011111111111
/// - Application type : 0bxx01111111111111
/// - Kernel version : 0bx011111111111111
/// - Handle table size : 0b0111111111111111
/// - Debugger flags : 0b1111111111111111
///
/// These are essentially a bit offset subtracted by 1 to create a mask.
/// e.g. The first entry in the above list is simply bit 3 (value 8 -> 0b1000)
/// subtracted by one (7 -> 0b0111)
///
/// An example of a bit layout (using the map physical layout):
/// <example>
/// The MapPhysical type indicates a sequence entry pair of:
///
/// [initial, memory_flags], where:
///
/// initial:
/// bits:
/// 7-24: Starting page to map memory at.
/// 25 : Indicates if the memory should be mapped as read only.
///
/// memory_flags:
/// bits:
/// 7-20 : Number of pages to map
/// 21-25: Seems to be reserved (still checked against though)
/// 26 : Whether or not the memory being mapped is IO memory, or physical memory
/// </example>
///
class ProcessCapabilities {
public:
using InterruptCapabilities = std::bitset<1024>;
using SyscallCapabilities = std::bitset<128>;
ProcessCapabilities() = default;
ProcessCapabilities(const ProcessCapabilities&) = delete;
ProcessCapabilities(ProcessCapabilities&&) = default;
ProcessCapabilities& operator=(const ProcessCapabilities&) = delete;
ProcessCapabilities& operator=(ProcessCapabilities&&) = default;
/// Initializes this process capabilities instance for a kernel process.
///
/// @param capabilities The capabilities to parse
/// @param num_capabilities The number of capabilities to parse.
/// @param vm_manager The memory manager to use for handling any mapping-related
/// operations (such as mapping IO memory, etc).
///
/// @returns RESULT_SUCCESS if this capabilities instance was able to be initialized,
/// otherwise, an error code upon failure.
///
ResultCode InitializeForKernelProcess(const u32* capabilities, std::size_t num_capabilities,
VMManager& vm_manager);
/// Initializes this process capabilities instance for a userland process.
///
/// @param capabilities The capabilities to parse.
/// @param num_capabilities The total number of capabilities to parse.
/// @param vm_manager The memory manager to use for handling any mapping-related
/// operations (such as mapping IO memory, etc).
///
/// @returns RESULT_SUCCESS if this capabilities instance was able to be initialized,
/// otherwise, an error code upon failure.
///
ResultCode InitializeForUserProcess(const u32* capabilities, std::size_t num_capabilities,
VMManager& vm_manager);
/// Initializes this process capabilities instance for a process that does not
/// have any metadata to parse.
///
/// This is necessary, as we allow running raw executables, and the internal
/// kernel process capabilities also determine what CPU cores the process is
/// allowed to run on, and what priorities are allowed for threads. It also
/// determines the max handle table size, what the program type is, whether or
/// not the process can be debugged, or whether it's possible for a process to
/// forcibly debug another process.
///
/// Given the above, this essentially enables all capabilities across the board
/// for the process. It allows the process to:
///
/// - Run on any core
/// - Use any thread priority
/// - Use the maximum amount of handles a process is allowed to.
/// - Be debuggable
/// - Forcibly debug other processes.
///
/// Note that this is not a behavior that the kernel allows a process to do via
/// a single function like this. This is yuzu-specific behavior to handle
/// executables with no capability descriptors whatsoever to derive behavior from.
/// It being yuzu-specific is why this is also not the default behavior and not
/// done by default in the constructor.
///
void InitializeForMetadatalessProcess();
/// Gets the allowable core mask
u64 GetCoreMask() const {
return core_mask;
}
/// Gets the allowable priority mask
u64 GetPriorityMask() const {
return priority_mask;
}
/// Gets the SVC access permission bits
const SyscallCapabilities& GetServiceCapabilities() const {
return svc_capabilities;
}
/// Gets the valid interrupt bits.
const InterruptCapabilities& GetInterruptCapabilities() const {
return interrupt_capabilities;
}
/// Gets the program type for this process.
ProgramType GetProgramType() const {
return program_type;
}
/// Gets the number of total allowable handles for the process' handle table.
u32 GetHandleTableSize() const {
return handle_table_size;
}
/// Gets the kernel version value.
u32 GetKernelVersion() const {
return kernel_version;
}
/// Whether or not this process can be debugged.
bool IsDebuggable() const {
return is_debuggable;
}
/// Whether or not this process can forcibly debug another
/// process, even if that process is not considered debuggable.
bool CanForceDebug() const {
return can_force_debug;
}
private:
/// Attempts to parse a given sequence of capability descriptors.
///
/// @param capabilities The sequence of capability descriptors to parse.
/// @param num_capabilities The number of descriptors within the given sequence.
/// @param vm_manager The memory manager that will perform any memory
/// mapping if necessary.
///
/// @return RESULT_SUCCESS if no errors occur, otherwise an error code.
///
ResultCode ParseCapabilities(const u32* capabilities, std::size_t num_capabilities,
VMManager& vm_manager);
/// Attempts to parse a capability descriptor that is only represented by a
/// single flag set.
///
/// @param set_flags Running set of flags that are used to catch
/// flags being initialized more than once when they shouldn't be.
/// @param set_svc_bits Running set of bits representing the allowed supervisor calls mask.
/// @param flag The flag to attempt to parse.
/// @param vm_manager The memory manager that will perform any memory
/// mapping if necessary.
///
/// @return RESULT_SUCCESS if no errors occurred, otherwise an error code.
///
ResultCode ParseSingleFlagCapability(u32& set_flags, u32& set_svc_bits, u32 flag,
VMManager& vm_manager);
/// Clears the internal state of this process capability instance. Necessary,
/// to have a sane starting point due to us allowing running executables without
/// configuration metadata. We assume a process is not going to have metadata,
/// and if it turns out that the process does, in fact, have metadata, then
/// we attempt to parse it. Thus, we need this to reset data members back to
/// a good state.
///
/// DO NOT ever make this a public member function. This isn't an invariant
/// anything external should depend upon (and if anything comes to rely on it,
/// you should immediately be questioning the design of that thing, not this
/// class. If the kernel itself can run without depending on behavior like that,
/// then so can yuzu).
///
void Clear();
/// Handles flags related to the priority and core number capability flags.
ResultCode HandlePriorityCoreNumFlags(u32 flags);
/// Handles flags related to determining the allowable SVC mask.
ResultCode HandleSyscallFlags(u32& set_svc_bits, u32 flags);
/// Handles flags related to mapping physical memory pages.
ResultCode HandleMapPhysicalFlags(u32 flags, u32 size_flags, VMManager& vm_manager);
/// Handles flags related to mapping IO pages.
ResultCode HandleMapIOFlags(u32 flags, VMManager& vm_manager);
/// Handles flags related to the interrupt capability flags.
ResultCode HandleInterruptFlags(u32 flags);
/// Handles flags related to the program type.
ResultCode HandleProgramTypeFlags(u32 flags);
/// Handles flags related to the handle table size.
ResultCode HandleHandleTableFlags(u32 flags);
/// Handles flags related to the kernel version capability flags.
ResultCode HandleKernelVersionFlags(u32 flags);
/// Handles flags related to debug-specific capabilities.
ResultCode HandleDebugFlags(u32 flags);
SyscallCapabilities svc_capabilities;
InterruptCapabilities interrupt_capabilities;
u64 core_mask = 0;
u64 priority_mask = 0;
u32 handle_table_size = 0;
u32 kernel_version = 0;
ProgramType program_type = ProgramType::SysModule;
bool is_debuggable = false;
bool can_force_debug = false;
};
} // namespace Kernel