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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.
master
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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83
src/core/hle/kernel/hle_ipc.cpp
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@ -55,7 +55,7 @@ void HLERequestContext::ParseCommandBuffer(const KHandleTable& handle_table, u32
IPC::RequestParser rp(src_cmdbuf);
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
return;
}
@ -101,10 +101,12 @@ void HLERequestContext::ParseCommandBuffer(const KHandleTable& handle_table, u32
const auto buffer_c_offset = rp.GetCurrentOffset() + command_header->data_size;
if (!command_header->IsTipc()) {
// 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::Request ||
command_header->type == IPC::CommandType::RequestWithContext) ||
!incoming)) {
// If this is an incoming message, only CommandType "Request" has a domain header
@ -122,7 +124,8 @@ void HLERequestContext::ParseCommandBuffer(const KHandleTable& handle_table, u32
data_payload_offset = rp.GetCurrentOffset();
if (domain_message_header && domain_message_header->command ==
if (domain_message_header &&
domain_message_header->command ==
IPC::DomainMessageHeader::CommandType::CloseVirtualHandle) {
// CloseVirtualHandle command does not have SFC* or any data
return;
@ -133,6 +136,7 @@ void HLERequestContext::ParseCommandBuffer(const KHandleTable& handle_table, u32
} else {
ASSERT(data_payload_header->magic == Common::MakeMagic('S', 'F', 'C', 'O'));
}
}
rp.SetCurrentOffset(buffer_c_offset);
@ -166,84 +170,55 @@ void HLERequestContext::ParseCommandBuffer(const KHandleTable& handle_table, u32
ResultCode HLERequestContext::PopulateFromIncomingCommandBuffer(const KHandleTable& handle_table,
u32_le* src_cmdbuf) {
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
return RESULT_SUCCESS;
}
// 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(src_cmdbuf, size, cmd_buf.begin());
std::copy_n(src_cmdbuf, IPC::COMMAND_BUFFER_LENGTH, cmd_buf.begin());
return RESULT_SUCCESS;
}
ResultCode HLERequestContext::WriteToOutgoingCommandBuffer(KThread& requesting_thread) {
auto current_offset = handles_offset;
auto& owner_process = *requesting_thread.GetOwnerProcess();
auto& handle_table = owner_process.GetHandleTable();
std::array<u32, IPC::COMMAND_BUFFER_LENGTH> dst_cmdbuf;
memory.ReadBlock(owner_process, requesting_thread.GetTLSAddress(), dst_cmdbuf.data(),
dst_cmdbuf.size() * sizeof(u32));
// 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));
Handle handle{};
if (object) {
R_TRY(handle_table.Add(&handle, object));
}
cmd_buf[current_offset++] = handle;
}
for (auto& object : move_objects) {
ASSERT(object != nullptr);
R_TRY(handle_table.Add(&dst_cmdbuf[current_offset++], object));
Handle handle{};
if (object) {
R_TRY(handle_table.Add(&handle, object));
// Close our reference to the object, as it is being moved to the caller.
object->Close();
}
cmd_buf[current_offset++] = handle;
}
// TODO(Subv): Translate the X/A/B/W 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) {
server_session->AppendDomainRequestHandler(object);
dst_cmdbuf[domain_offset++] =
cmd_buf[current_offset++] =
static_cast<u32_le>(server_session->NumDomainRequestHandlers());
}
}
// Copy the translated command buffer back into the thread's command buffer area.
memory.WriteBlock(owner_process, requesting_thread.GetTLSAddress(), dst_cmdbuf.data(),
dst_cmdbuf.size() * sizeof(u32));
memory.WriteBlock(owner_process, requesting_thread.GetTLSAddress(), cmd_buf.data(),
cmd_buf.size() * sizeof(u32));
return RESULT_SUCCESS;
}

3
src/core/hle/kernel/hle_ipc.h
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@ -66,7 +66,8 @@ public:
* this request (ServerSession, Originator thread, Translated command buffer, etc).
* @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