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IPC Cleanup: Remove 3DS-specific code and translate copy, move and domain objects in IPC requests.

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Popping objects from the buffer is still not implemented.
This commit is contained in:
Subv 2018-01-07 01:50:55 -05:00 • committed by bunnei
parent b0ceb4df70
commit 0368324f79
8 changed files with 116 additions and 403 deletions
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103
src/core/hle/kernel/hle_ipc.cpp
View file

@ -37,20 +37,6 @@ HLERequestContext::HLERequestContext(SharedPtr<Kernel::ServerSession> server_ses
HLERequestContext::~HLERequestContext() = default;
SharedPtr<Object> HLERequestContext::GetIncomingHandle(u32 id_from_cmdbuf) const {
ASSERT(id_from_cmdbuf < request_handles.size());
return request_handles[id_from_cmdbuf];
}
u32 HLERequestContext::AddOutgoingHandle(SharedPtr<Object> object) {
request_handles.push_back(std::move(object));
return static_cast<u32>(request_handles.size() - 1);
}
void HLERequestContext::ClearIncomingObjects() {
request_handles.clear();
}
void HLERequestContext::ParseCommandBuffer(u32_le* src_cmdbuf, bool incoming) {
IPC::RequestParser rp(src_cmdbuf);
command_header = std::make_unique<IPC::CommandHeader>(rp.PopRaw<IPC::CommandHeader>());
@ -95,7 +81,7 @@ void HLERequestContext::ParseCommandBuffer(u32_le* src_cmdbuf, bool incoming) {
// If this is an incoming message, only CommandType "Request" has a domain header
// All outgoing domain messages have the domain header
domain_message_header =
std::make_unique<IPC::DomainRequestMessageHeader>(rp.PopRaw<IPC::DomainRequestMessageHeader>());
std::make_unique<IPC::DomainMessageHeader>(rp.PopRaw<IPC::DomainMessageHeader>());
}
data_payload_header =
@ -107,61 +93,78 @@ void HLERequestContext::ParseCommandBuffer(u32_le* src_cmdbuf, bool incoming) {
ASSERT(data_payload_header->magic == Common::MakeMagic('S', 'F', 'C', 'O'));
}
data_payload_offset = rp.GetCurrentOffset();
command = rp.Pop<u32_le>();
rp.Skip(1, false); // The command is actually an u64, but we don't use the high part.
data_payload_offset = rp.GetCurrentOffset();
}
ResultCode HLERequestContext::PopulateFromIncomingCommandBuffer(u32_le* src_cmdbuf,
Process& src_process,
HandleTable& src_table) {
ParseCommandBuffer(src_cmdbuf, true);
size_t untranslated_size = data_payload_offset + command_header->data_size;
std::copy_n(src_cmdbuf, untranslated_size, cmd_buf.begin());
// The data_size already includes the payload header, the padding and the domain header.
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;
}
ResultCode HLERequestContext::WriteToOutgoingCommandBuffer(u32_le* dst_cmdbuf, Process& dst_process,
HandleTable& dst_table) {
ParseCommandBuffer(&cmd_buf[0], false);
size_t untranslated_size = data_payload_offset + command_header->data_size;
std::copy_n(cmd_buf.begin(), untranslated_size, dst_cmdbuf);
// 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(cmd_buf.data(), false);
// The data_size already includes the payload header, the padding and the domain header.
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);
if (command_header->enable_handle_descriptor) {
size_t command_size = untranslated_size + handle_descriptor_header->num_handles_to_copy +
handle_descriptor_header->num_handles_to_move;
ASSERT(command_size <= IPC::COMMAND_BUFFER_LENGTH);
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.
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");
size_t untranslated_index = untranslated_size;
size_t handle_write_offset = 3;
while (untranslated_index < command_size) {
u32 descriptor = cmd_buf[untranslated_index];
untranslated_index += 1;
ASSERT_MSG(copy_objects.size() == handle_descriptor_header->num_handles_to_copy);
ASSERT_MSG(move_objects.size() == handle_descriptor_header->num_handles_to_move);
switch (IPC::GetDescriptorType(descriptor)) {
case IPC::DescriptorType::CopyHandle:
case IPC::DescriptorType::MoveHandle: {
// HLE services don't use handles, so we treat both CopyHandle and MoveHandle
// equally
u32 num_handles = IPC::HandleNumberFromDesc(descriptor);
for (u32 j = 0; j < num_handles; ++j) {
SharedPtr<Object> object = GetIncomingHandle(cmd_buf[untranslated_index]);
Handle handle = 0;
if (object != nullptr) {
// TODO(yuriks): Figure out the proper error handling for if this fails
handle = dst_table.Create(object).Unwrap();
}
dst_cmdbuf[handle_write_offset++] = handle;
untranslated_index++;
}
break;
}
default:
UNIMPLEMENTED_MSG("Unsupported handle translation: 0x%08X", descriptor);
}
// 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);
dst_cmdbuf[current_offset++] = Kernel::g_handle_table.Create(object).Unwrap();
}
for (auto& object : move_objects) {
ASSERT(object != nullptr);
dst_cmdbuf[current_offset++] = Kernel::g_handle_table.Create(object).Unwrap();
}
}
// TODO(Subv): Translate the X/A/B/W buffers.
if (IsDomain()) {
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.
size_t domain_offset = size - domain_message_header->num_objects;
auto& request_handlers = domain->request_handlers;
for (auto& object : domain_objects) {
request_handlers.emplace_back(object);
dst_cmdbuf[domain_offset++] = request_handlers.size();
}
}
return RESULT_SUCCESS;
}

39
src/core/hle/kernel/hle_ipc.h
View file

@ -110,25 +110,6 @@ public:
return server_session;
}
/**
* Resolves a object id from the request command buffer into a pointer to an object. See the
* "HLE handle protocol" section in the class documentation for more details.
*/
SharedPtr<Object> GetIncomingHandle(u32 id_from_cmdbuf) const;
/**
* Adds an outgoing object to the response, returning the id which should be used to reference
* it. See the "HLE handle protocol" section in the class documentation for more details.
*/
u32 AddOutgoingHandle(SharedPtr<Object> object);
/**
* Discards all Objects from the context, invalidating all ids. This may be called after reading
* out all incoming objects, so that the buffer memory can be re-used for outgoing handles, but
* this is not required.
*/
void ClearIncomingObjects();
void ParseCommandBuffer(u32_le* src_cmdbuf, bool incoming);
/// Populates this context with data from the requesting process/thread.
@ -158,7 +139,7 @@ public:
return buffer_a_desciptors;
}
const std::unique_ptr<IPC::DomainRequestMessageHeader>& GetDomainMessageHeader() const {
const std::unique_ptr<IPC::DomainMessageHeader>& GetDomainMessageHeader() const {
return domain_message_header;
}
@ -166,17 +147,31 @@ public:
return domain != nullptr;
}
void AddMoveObject(SharedPtr<Object> object) {
move_objects.emplace_back(std::move(object));
}
void AddCopyObject(SharedPtr<Object> object) {
copy_objects.emplace_back(std::move(object));
}
void AddDomainObject(std::shared_ptr<SessionRequestHandler> object) {
domain_objects.emplace_back(std::move(object));
}
private:
std::array<u32, IPC::COMMAND_BUFFER_LENGTH> cmd_buf;
SharedPtr<Kernel::Domain> domain;
SharedPtr<Kernel::ServerSession> server_session;
// TODO(yuriks): Check common usage of this and optimize size accordingly
boost::container::small_vector<SharedPtr<Object>, 8> request_handles;
boost::container::small_vector<SharedPtr<Object>, 8> move_objects;
boost::container::small_vector<SharedPtr<Object>, 8> copy_objects;
boost::container::small_vector<std::shared_ptr<SessionRequestHandler>, 8> domain_objects;
std::unique_ptr<IPC::CommandHeader> command_header;
std::unique_ptr<IPC::HandleDescriptorHeader> handle_descriptor_header;
std::unique_ptr<IPC::DataPayloadHeader> data_payload_header;
std::unique_ptr<IPC::DomainRequestMessageHeader> domain_message_header;
std::unique_ptr<IPC::DomainMessageHeader> domain_message_header;
std::vector<IPC::BufferDescriptorX> buffer_x_desciptors;
std::vector<IPC::BufferDescriptorABW> buffer_a_desciptors;
std::vector<IPC::BufferDescriptorABW> buffer_b_desciptors;