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hle: kernel: hle_ipc: Improve IPC code and add initial support for TIPC. 

- Fixes our move handles implementation to actually move objects.
- Simplifies the traditional IPC path.
This commit is contained in:
bunnei 2021-05-10 16:16:36 -07:00
parent 49c4c329f6
commit 913971417e
2 changed files with 56 additions and 80 deletions
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133
src/core/hle/kernel/hle_ipc.cpp
View File

@ -55,7 +55,7 @@ void HLERequestContext::ParseCommandBuffer(const KHandleTable& handle_table, u32
IPC::RequestParser rp(src_cmdbuf); IPC::RequestParser rp(src_cmdbuf);
command_header = rp.PopRaw<IPC::CommandHeader>(); command_header = rp.PopRaw<IPC::CommandHeader>();
if (command_header->type == IPC::CommandType::Close) { if (command_header->IsCloseCommand()) {
// Close does not populate the rest of the IPC header // Close does not populate the rest of the IPC header
return; return;
} }
@ -101,37 +101,41 @@ void HLERequestContext::ParseCommandBuffer(const KHandleTable& handle_table, u32
const auto buffer_c_offset = rp.GetCurrentOffset() + command_header->data_size; const auto buffer_c_offset = rp.GetCurrentOffset() + command_header->data_size;
// Padding to align to 16 bytes if (!command_header->IsTipc()) {
rp.AlignWithPadding(); // Padding to align to 16 bytes
rp.AlignWithPadding();
if (Session()->IsDomain() && ((command_header->type == IPC::CommandType::Request || if (Session()->IsDomain() &&
command_header->type == IPC::CommandType::RequestWithContext) || ((command_header->type == IPC::CommandType::Request ||
!incoming)) { command_header->type == IPC::CommandType::RequestWithContext) ||
// If this is an incoming message, only CommandType "Request" has a domain header !incoming)) {
// All outgoing domain messages have the domain header, if only incoming has it // If this is an incoming message, only CommandType "Request" has a domain header
if (incoming || domain_message_header) { // All outgoing domain messages have the domain header, if only incoming has it
domain_message_header = rp.PopRaw<IPC::DomainMessageHeader>(); if (incoming || domain_message_header) {
} else { domain_message_header = rp.PopRaw<IPC::DomainMessageHeader>();
if (Session()->IsDomain()) { } else {
LOG_WARNING(IPC, "Domain request has no DomainMessageHeader!"); if (Session()->IsDomain()) {
LOG_WARNING(IPC, "Domain request has no DomainMessageHeader!");
}
} }
} }
}
data_payload_header = rp.PopRaw<IPC::DataPayloadHeader>(); data_payload_header = rp.PopRaw<IPC::DataPayloadHeader>();
data_payload_offset = rp.GetCurrentOffset(); data_payload_offset = rp.GetCurrentOffset();
if (domain_message_header && domain_message_header->command == if (domain_message_header &&
IPC::DomainMessageHeader::CommandType::CloseVirtualHandle) { domain_message_header->command ==
// CloseVirtualHandle command does not have SFC* or any data IPC::DomainMessageHeader::CommandType::CloseVirtualHandle) {
return; // CloseVirtualHandle command does not have SFC* or any data
} return;
}
if (incoming) { if (incoming) {
ASSERT(data_payload_header->magic == Common::MakeMagic('S', 'F', 'C', 'I')); ASSERT(data_payload_header->magic == Common::MakeMagic('S', 'F', 'C', 'I'));
} else { } else {
ASSERT(data_payload_header->magic == Common::MakeMagic('S', 'F', 'C', 'O')); ASSERT(data_payload_header->magic == Common::MakeMagic('S', 'F', 'C', 'O'));
}
} }
rp.SetCurrentOffset(buffer_c_offset); rp.SetCurrentOffset(buffer_c_offset);
@ -166,84 +170,55 @@ void HLERequestContext::ParseCommandBuffer(const KHandleTable& handle_table, u32
ResultCode HLERequestContext::PopulateFromIncomingCommandBuffer(const KHandleTable& handle_table, ResultCode HLERequestContext::PopulateFromIncomingCommandBuffer(const KHandleTable& handle_table,
u32_le* src_cmdbuf) { u32_le* src_cmdbuf) {
ParseCommandBuffer(handle_table, src_cmdbuf, true); ParseCommandBuffer(handle_table, src_cmdbuf, true);
if (command_header->type == IPC::CommandType::Close) {
if (command_header->IsCloseCommand()) {
// Close does not populate the rest of the IPC header // Close does not populate the rest of the IPC header
return RESULT_SUCCESS; return RESULT_SUCCESS;
} }
// The data_size already includes the payload header, the padding and the domain header. std::copy_n(src_cmdbuf, IPC::COMMAND_BUFFER_LENGTH, cmd_buf.begin());
std::size_t size = data_payload_offset + command_header->data_size -
sizeof(IPC::DataPayloadHeader) / sizeof(u32) - 4;
if (domain_message_header)
size -= sizeof(IPC::DomainMessageHeader) / sizeof(u32);
std::copy_n(src_cmdbuf, size, cmd_buf.begin());
return RESULT_SUCCESS; return RESULT_SUCCESS;
} }
ResultCode HLERequestContext::WriteToOutgoingCommandBuffer(KThread& requesting_thread) { ResultCode HLERequestContext::WriteToOutgoingCommandBuffer(KThread& requesting_thread) {
auto current_offset = handles_offset;
auto& owner_process = *requesting_thread.GetOwnerProcess(); auto& owner_process = *requesting_thread.GetOwnerProcess();
auto& handle_table = owner_process.GetHandleTable(); auto& handle_table = owner_process.GetHandleTable();
std::array<u32, IPC::COMMAND_BUFFER_LENGTH> dst_cmdbuf; for (auto& object : copy_objects) {
memory.ReadBlock(owner_process, requesting_thread.GetTLSAddress(), dst_cmdbuf.data(), Handle handle{};
dst_cmdbuf.size() * sizeof(u32)); if (object) {
R_TRY(handle_table.Add(&handle, object));
// The header was already built in the internal command buffer. Attempt to parse it to verify
// the integrity and then copy it over to the target command buffer.
ParseCommandBuffer(handle_table, cmd_buf.data(), false);
// The data_size already includes the payload header, the padding and the domain header.
std::size_t size = data_payload_offset + command_header->data_size -
sizeof(IPC::DataPayloadHeader) / sizeof(u32) - 4;
if (domain_message_header)
size -= sizeof(IPC::DomainMessageHeader) / sizeof(u32);
std::copy_n(cmd_buf.begin(), size, dst_cmdbuf.data());
if (command_header->enable_handle_descriptor) {
ASSERT_MSG(!move_objects.empty() || !copy_objects.empty(),
"Handle descriptor bit set but no handles to translate");
// We write the translated handles at a specific offset in the command buffer, this space
// was already reserved when writing the header.
std::size_t current_offset =
(sizeof(IPC::CommandHeader) + sizeof(IPC::HandleDescriptorHeader)) / sizeof(u32);
ASSERT_MSG(!handle_descriptor_header->send_current_pid, "Sending PID is not implemented");
ASSERT(copy_objects.size() == handle_descriptor_header->num_handles_to_copy);
ASSERT(move_objects.size() == handle_descriptor_header->num_handles_to_move);
// We don't make a distinction between copy and move handles when translating since HLE
// services don't deal with handles directly. However, the guest applications might check
// for specific values in each of these descriptors.
for (auto& object : copy_objects) {
ASSERT(object != nullptr);
R_TRY(handle_table.Add(&dst_cmdbuf[current_offset++], object));
} }
cmd_buf[current_offset++] = handle;
}
for (auto& object : move_objects) {
Handle handle{};
if (object) {
R_TRY(handle_table.Add(&handle, object));
for (auto& object : move_objects) { // Close our reference to the object, as it is being moved to the caller.
ASSERT(object != nullptr); object->Close();
R_TRY(handle_table.Add(&dst_cmdbuf[current_offset++], object));
} }
cmd_buf[current_offset++] = handle;
} }
// TODO(Subv): Translate the X/A/B/W buffers. // Write the domain objects to the command buffer, these go after the raw untranslated data.
// TODO(Subv): This completely ignores C buffers.
if (Session()->IsDomain() && domain_message_header) {
ASSERT(domain_message_header->num_objects == domain_objects.size());
// Write the domain objects to the command buffer, these go after the raw untranslated data.
// TODO(Subv): This completely ignores C buffers.
std::size_t domain_offset = size - domain_message_header->num_objects;
if (Session()->IsDomain()) {
current_offset = domain_offset - static_cast<u32>(domain_objects.size());
for (const auto& object : domain_objects) { for (const auto& object : domain_objects) {
server_session->AppendDomainRequestHandler(object); server_session->AppendDomainRequestHandler(object);
dst_cmdbuf[domain_offset++] = cmd_buf[current_offset++] =
static_cast<u32_le>(server_session->NumDomainRequestHandlers()); static_cast<u32_le>(server_session->NumDomainRequestHandlers());
} }
} }
// Copy the translated command buffer back into the thread's command buffer area. // Copy the translated command buffer back into the thread's command buffer area.
memory.WriteBlock(owner_process, requesting_thread.GetTLSAddress(), dst_cmdbuf.data(), memory.WriteBlock(owner_process, requesting_thread.GetTLSAddress(), cmd_buf.data(),
dst_cmdbuf.size() * sizeof(u32)); cmd_buf.size() * sizeof(u32));
return RESULT_SUCCESS; return RESULT_SUCCESS;
} }

3
src/core/hle/kernel/hle_ipc.h
View File

@ -66,7 +66,8 @@ public:
* this request (ServerSession, Originator thread, Translated command buffer, etc). * this request (ServerSession, Originator thread, Translated command buffer, etc).
* @returns ResultCode the result code of the translate operation. * @returns ResultCode the result code of the translate operation.
*/ */
virtual ResultCode HandleSyncRequest(Kernel::HLERequestContext& context) = 0; virtual ResultCode HandleSyncRequest(Kernel::KServerSession& session,
Kernel::HLERequestContext& context) = 0;
/** /**
* Signals that a client has just connected to this HLE handler and keeps the * Signals that a client has just connected to this HLE handler and keeps the