mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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96f95b9f95
* result: try out some experimental shenanigans * result: sketch out some more shenanigans * result: see what it looks like to convert kernel to use result conds instead of guards * make rest of kernel use experimental new macro-ing
1419 lines
71 KiB
C++
1419 lines
71 KiB
C++
/*
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* Copyright (c) Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <mesosphere.hpp>
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#pragma GCC push_options
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#pragma GCC optimize ("-O3")
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namespace ams::kern {
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namespace ipc {
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using MessageBuffer = ams::svc::ipc::MessageBuffer;
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}
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namespace {
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constexpr inline size_t PointerTransferBufferAlignment = 0x10;
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class ThreadQueueImplForKServerSessionRequest final : public KThreadQueue { /* ... */ };
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class ReceiveList {
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private:
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u32 m_data[ipc::MessageBuffer::MessageHeader::ReceiveListCountType_CountMax * ipc::MessageBuffer::ReceiveListEntry::GetDataSize() / sizeof(u32)];
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s32 m_recv_list_count;
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uintptr_t m_msg_buffer_end;
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uintptr_t m_msg_buffer_space_end;
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public:
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static constexpr ALWAYS_INLINE int GetEntryCount(const ipc::MessageBuffer::MessageHeader &header) {
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const auto count = header.GetReceiveListCount();
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switch (count) {
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case ipc::MessageBuffer::MessageHeader::ReceiveListCountType_None:
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return 0;
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case ipc::MessageBuffer::MessageHeader::ReceiveListCountType_ToMessageBuffer:
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return 0;
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case ipc::MessageBuffer::MessageHeader::ReceiveListCountType_ToSingleBuffer:
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return 1;
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default:
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return count - ipc::MessageBuffer::MessageHeader::ReceiveListCountType_CountOffset;
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}
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}
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public:
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ReceiveList(const u32 *dst_msg, uintptr_t dst_address, const KProcessPageTable &dst_page_table, const ipc::MessageBuffer::MessageHeader &dst_header, const ipc::MessageBuffer::SpecialHeader &dst_special_header, size_t msg_size, size_t out_offset, s32 dst_recv_list_idx, bool is_tls) {
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m_recv_list_count = dst_header.GetReceiveListCount();
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m_msg_buffer_end = dst_address + sizeof(u32) * out_offset;
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m_msg_buffer_space_end = dst_address + msg_size;
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/* NOTE: Nintendo calculates the receive list index here using the special header. */
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/* We pre-calculate it in the caller, and pass it as a parameter. */
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MESOSPHERE_UNUSED(dst_special_header);
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const u32 *recv_list = dst_msg + dst_recv_list_idx;
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const auto entry_count = GetEntryCount(dst_header);
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if (is_tls) {
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__builtin_memcpy(m_data, recv_list, entry_count * ipc::MessageBuffer::ReceiveListEntry::GetDataSize());
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} else {
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uintptr_t page_addr = util::AlignDown(dst_address, PageSize);
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uintptr_t cur_addr = dst_address + dst_recv_list_idx * sizeof(u32);
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for (size_t i = 0; i < entry_count * ipc::MessageBuffer::ReceiveListEntry::GetDataSize() / sizeof(u32); ++i) {
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if (page_addr != util::AlignDown(cur_addr, PageSize)) {
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KPhysicalAddress phys_addr;
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dst_page_table.GetPhysicalAddress(std::addressof(phys_addr), KProcessAddress(cur_addr));
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recv_list = GetPointer<u32>(KPageTable::GetHeapVirtualAddress(phys_addr));
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page_addr = util::AlignDown(cur_addr, PageSize);
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}
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m_data[i] = *(recv_list++);
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cur_addr += sizeof(u32);
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}
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}
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}
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constexpr ALWAYS_INLINE bool IsIndex() const {
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return m_recv_list_count > ipc::MessageBuffer::MessageHeader::ReceiveListCountType_CountOffset;
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}
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void GetBuffer(uintptr_t &out, size_t size, int &key) const {
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switch (m_recv_list_count) {
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case ipc::MessageBuffer::MessageHeader::ReceiveListCountType_None:
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{
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out = 0;
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}
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break;
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case ipc::MessageBuffer::MessageHeader::ReceiveListCountType_ToMessageBuffer:
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{
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const uintptr_t buf = util::AlignUp(m_msg_buffer_end + key, PointerTransferBufferAlignment);
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if ((buf < buf + size) && (buf + size <= m_msg_buffer_space_end)) {
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out = buf;
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key = buf + size - m_msg_buffer_end;
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} else {
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out = 0;
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}
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}
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break;
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case ipc::MessageBuffer::MessageHeader::ReceiveListCountType_ToSingleBuffer:
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{
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const ipc::MessageBuffer::ReceiveListEntry entry(m_data[0], m_data[1]);
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const uintptr_t buf = util::AlignUp(entry.GetAddress() + key, PointerTransferBufferAlignment);
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const uintptr_t entry_addr = entry.GetAddress();
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const size_t entry_size = entry.GetSize();
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if ((buf < buf + size) && (entry_addr < entry_addr + entry_size) && (buf + size <= entry_addr + entry_size)) {
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out = buf;
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key = buf + size - entry_addr;
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} else {
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out = 0;
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}
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}
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break;
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default:
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{
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if (key < m_recv_list_count - ipc::MessageBuffer::MessageHeader::ReceiveListCountType_CountOffset) {
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const ipc::MessageBuffer::ReceiveListEntry entry(m_data[2 * key + 0], m_data[2 * key + 1]);
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const uintptr_t entry_addr = entry.GetAddress();
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const size_t entry_size = entry.GetSize();
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if ((entry_addr < entry_addr + entry_size) && (entry_size >= size)) {
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out = entry_addr;
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}
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} else {
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out = 0;
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}
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}
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break;
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}
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}
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};
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template<bool MoveHandleAllowed>
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ALWAYS_INLINE Result ProcessMessageSpecialData(int &offset, KProcess &dst_process, KProcess &src_process, KThread &src_thread, const ipc::MessageBuffer &dst_msg, const ipc::MessageBuffer &src_msg, const ipc::MessageBuffer::SpecialHeader &src_special_header) {
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/* Copy the special header to the destination. */
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offset = dst_msg.Set(src_special_header);
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/* Copy the process ID. */
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if (src_special_header.GetHasProcessId()) {
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/* NOTE: Atmosphere extends the official kernel here to enable the mitm api. */
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/* If building the kernel without this support, just set the following to false. */
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constexpr bool EnableProcessIdPassthroughForAtmosphere = true;
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if constexpr (EnableProcessIdPassthroughForAtmosphere) {
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constexpr u64 PassthroughProcessIdMask = UINT64_C(0xFFFF000000000000);
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constexpr u64 PassthroughProcessIdValue = UINT64_C(0xFFFE000000000000);
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static_assert((PassthroughProcessIdMask & PassthroughProcessIdValue) == PassthroughProcessIdValue);
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const u64 src_process_id_value = src_msg.GetProcessId(offset);
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const bool is_passthrough = (src_process_id_value & PassthroughProcessIdMask) == PassthroughProcessIdValue;
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offset = dst_msg.SetProcessId(offset, is_passthrough ? (src_process_id_value & ~PassthroughProcessIdMask) : src_process.GetId());
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} else {
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offset = dst_msg.SetProcessId(offset, src_process.GetId());
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}
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}
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/* Prepare to process handles. */
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auto &dst_handle_table = dst_process.GetHandleTable();
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auto &src_handle_table = src_process.GetHandleTable();
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Result result = ResultSuccess();
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/* Process copy handles. */
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for (auto i = 0; i < src_special_header.GetCopyHandleCount(); ++i) {
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/* Get the handles. */
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const ams::svc::Handle src_handle = src_msg.GetHandle(offset);
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ams::svc::Handle dst_handle = ams::svc::InvalidHandle;
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/* If we're in a success state, try to move the handle to the new table. */
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if (R_SUCCEEDED(result) && src_handle != ams::svc::InvalidHandle) {
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KScopedAutoObject obj = src_handle_table.GetObjectForIpc(src_handle, std::addressof(src_thread));
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if (obj.IsNotNull()) {
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Result add_result = dst_handle_table.Add(std::addressof(dst_handle), obj.GetPointerUnsafe());
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if (R_FAILED(add_result)) {
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result = add_result;
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dst_handle = ams::svc::InvalidHandle;
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}
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} else {
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result = svc::ResultInvalidHandle();
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}
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}
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/* Set the handle. */
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offset = dst_msg.SetHandle(offset, dst_handle);
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}
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/* Process move handles. */
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if constexpr (MoveHandleAllowed) {
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for (auto i = 0; i < src_special_header.GetMoveHandleCount(); ++i) {
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/* Get the handles. */
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const ams::svc::Handle src_handle = src_msg.GetHandle(offset);
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ams::svc::Handle dst_handle = ams::svc::InvalidHandle;
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/* Whether or not we've succeeded, we need to remove the handles from the source table. */
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if (src_handle != ams::svc::InvalidHandle) {
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if (R_SUCCEEDED(result)) {
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KScopedAutoObject obj = src_handle_table.GetObjectForIpcWithoutPseudoHandle(src_handle);
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if (obj.IsNotNull()) {
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Result add_result = dst_handle_table.Add(std::addressof(dst_handle), obj.GetPointerUnsafe());
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src_handle_table.Remove(src_handle);
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if (R_FAILED(add_result)) {
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result = add_result;
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dst_handle = ams::svc::InvalidHandle;
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}
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} else {
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result = svc::ResultInvalidHandle();
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}
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} else {
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src_handle_table.Remove(src_handle);
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}
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}
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/* Set the handle. */
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offset = dst_msg.SetHandle(offset, dst_handle);
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}
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}
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R_RETURN(result);
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}
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ALWAYS_INLINE Result ProcessReceiveMessagePointerDescriptors(int &offset, int &pointer_key, KProcessPageTable &dst_page_table, KProcessPageTable &src_page_table, const ipc::MessageBuffer &dst_msg, const ipc::MessageBuffer &src_msg, const ReceiveList &dst_recv_list, bool dst_user) {
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/* Get the offset at the start of processing. */
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const int cur_offset = offset;
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/* Get the pointer desc. */
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ipc::MessageBuffer::PointerDescriptor src_desc(src_msg, cur_offset);
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offset += ipc::MessageBuffer::PointerDescriptor::GetDataSize() / sizeof(u32);
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/* Extract address/size. */
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const uintptr_t src_pointer = src_desc.GetAddress();
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const size_t recv_size = src_desc.GetSize();
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uintptr_t recv_pointer = 0;
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/* Process the buffer, if it has a size. */
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if (recv_size > 0) {
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/* If using indexing, set index. */
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if (dst_recv_list.IsIndex()) {
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pointer_key = src_desc.GetIndex();
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}
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/* Get the buffer. */
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dst_recv_list.GetBuffer(recv_pointer, recv_size, pointer_key);
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R_UNLESS(recv_pointer != 0, svc::ResultOutOfResource());
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/* Perform the pointer data copy. */
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if (dst_user) {
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R_TRY(src_page_table.CopyMemoryFromHeapToHeapWithoutCheckDestination(dst_page_table, recv_pointer, recv_size,
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KMemoryState_FlagReferenceCounted, KMemoryState_FlagReferenceCounted,
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static_cast<KMemoryPermission>(KMemoryPermission_NotMapped | KMemoryPermission_KernelReadWrite),
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KMemoryAttribute_Uncached | KMemoryAttribute_Locked, KMemoryAttribute_Locked,
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src_pointer,
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KMemoryState_FlagReferenceCounted, KMemoryState_FlagReferenceCounted,
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KMemoryPermission_UserRead,
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KMemoryAttribute_Uncached, KMemoryAttribute_None));
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} else {
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R_TRY(src_page_table.CopyMemoryFromLinearToUser(recv_pointer, recv_size, src_pointer,
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KMemoryState_FlagReferenceCounted, KMemoryState_FlagReferenceCounted,
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KMemoryPermission_UserRead,
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KMemoryAttribute_Uncached, KMemoryAttribute_None));
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}
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}
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/* Set the output descriptor. */
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dst_msg.Set(cur_offset, ipc::MessageBuffer::PointerDescriptor(reinterpret_cast<void *>(recv_pointer), recv_size, src_desc.GetIndex()));
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R_SUCCEED();
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}
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constexpr ALWAYS_INLINE Result GetMapAliasMemoryState(KMemoryState &out, ipc::MessageBuffer::MapAliasDescriptor::Attribute attr) {
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switch (attr) {
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case ipc::MessageBuffer::MapAliasDescriptor::Attribute_Ipc: out = KMemoryState_Ipc; break;
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case ipc::MessageBuffer::MapAliasDescriptor::Attribute_NonSecureIpc: out = KMemoryState_NonSecureIpc; break;
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case ipc::MessageBuffer::MapAliasDescriptor::Attribute_NonDeviceIpc: out = KMemoryState_NonDeviceIpc; break;
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default: R_THROW(svc::ResultInvalidCombination());
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}
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R_SUCCEED();
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}
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constexpr ALWAYS_INLINE Result GetMapAliasTestStateAndAttributeMask(u32 &out_state, u32 &out_attr_mask, KMemoryState state) {
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switch (state) {
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case KMemoryState_Ipc:
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out_state = KMemoryState_FlagCanUseIpc;
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out_attr_mask = KMemoryAttribute_Uncached | KMemoryAttribute_DeviceShared | KMemoryAttribute_Locked;
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break;
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case KMemoryState_NonSecureIpc:
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out_state = KMemoryState_FlagCanUseNonSecureIpc;
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out_attr_mask = KMemoryAttribute_Uncached | KMemoryAttribute_Locked;
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break;
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case KMemoryState_NonDeviceIpc:
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out_state = KMemoryState_FlagCanUseNonDeviceIpc;
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out_attr_mask = KMemoryAttribute_Uncached | KMemoryAttribute_Locked;
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break;
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default:
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R_THROW(svc::ResultInvalidCombination());
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}
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R_SUCCEED();
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}
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ALWAYS_INLINE void CleanupSpecialData(KProcess &dst_process, u32 *dst_msg_ptr, size_t dst_buffer_size) {
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/* Parse the message. */
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const ipc::MessageBuffer dst_msg(dst_msg_ptr, dst_buffer_size);
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const ipc::MessageBuffer::MessageHeader dst_header(dst_msg);
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const ipc::MessageBuffer::SpecialHeader dst_special_header(dst_msg, dst_header);
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/* Check that the size is big enough. */
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if (ipc::MessageBuffer::GetMessageBufferSize(dst_header, dst_special_header) > dst_buffer_size) {
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return;
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}
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/* Set the special header. */
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int offset = dst_msg.Set(dst_special_header);
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/* Clear the process id, if needed. */
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if (dst_special_header.GetHasProcessId()) {
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offset = dst_msg.SetProcessId(offset, 0);
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}
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/* Clear handles, as relevant. */
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auto &dst_handle_table = dst_process.GetHandleTable();
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for (auto i = 0; i < (dst_special_header.GetCopyHandleCount() + dst_special_header.GetMoveHandleCount()); ++i) {
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const ams::svc::Handle handle = dst_msg.GetHandle(offset);
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if (handle != ams::svc::InvalidHandle) {
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dst_handle_table.Remove(handle);
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}
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offset = dst_msg.SetHandle(offset, ams::svc::InvalidHandle);
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}
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}
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ALWAYS_INLINE Result CleanupServerHandles(uintptr_t message, size_t buffer_size, KPhysicalAddress message_paddr) {
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/* Server is assumed to be current thread. */
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const KThread &thread = GetCurrentThread();
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/* Get the linear message pointer. */
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u32 *msg_ptr;
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if (message) {
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msg_ptr = GetPointer<u32>(KPageTable::GetHeapVirtualAddress(message_paddr));
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} else {
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msg_ptr = static_cast<ams::svc::ThreadLocalRegion *>(thread.GetThreadLocalRegionHeapAddress())->message_buffer;
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buffer_size = sizeof(ams::svc::ThreadLocalRegion{}.message_buffer);
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message = GetInteger(thread.GetThreadLocalRegionAddress());
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}
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/* Parse the message. */
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const ipc::MessageBuffer msg(msg_ptr, buffer_size);
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const ipc::MessageBuffer::MessageHeader header(msg);
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const ipc::MessageBuffer::SpecialHeader special_header(msg, header);
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/* Check that the size is big enough. */
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R_UNLESS(ipc::MessageBuffer::GetMessageBufferSize(header, special_header) <= buffer_size, svc::ResultInvalidCombination());
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/* If there's a special header, there may be move handles we need to close. */
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if (header.GetHasSpecialHeader()) {
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/* Determine the offset to the start of handles. */
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auto offset = msg.GetSpecialDataIndex(header, special_header);
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if (special_header.GetHasProcessId()) {
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offset += sizeof(u64) / sizeof(u32);
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}
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if (auto copy_count = special_header.GetCopyHandleCount(); copy_count > 0) {
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offset += (sizeof(ams::svc::Handle) * copy_count) / sizeof(u32);
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}
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/* Get the handle table. */
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auto &handle_table = thread.GetOwnerProcess()->GetHandleTable();
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/* Close the handles. */
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for (auto i = 0; i < special_header.GetMoveHandleCount(); ++i) {
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handle_table.Remove(msg.GetHandle(offset));
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offset += sizeof(ams::svc::Handle) / sizeof(u32);
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}
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}
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R_SUCCEED();
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}
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ALWAYS_INLINE Result CleanupServerMap(KSessionRequest *request, KProcess *server_process) {
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/* If there's no server process, there's nothing to clean up. */
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R_SUCCEED_IF(server_process == nullptr);
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/* Get the page table. */
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auto &server_page_table = server_process->GetPageTable();
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/* Cleanup Send mappings. */
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for (size_t i = 0; i < request->GetSendCount(); ++i) {
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R_TRY(server_page_table.CleanupForIpcServer(request->GetSendServerAddress(i), request->GetSendSize(i), request->GetSendMemoryState(i)));
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}
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/* Cleanup Receive mappings. */
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for (size_t i = 0; i < request->GetReceiveCount(); ++i) {
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R_TRY(server_page_table.CleanupForIpcServer(request->GetReceiveServerAddress(i), request->GetReceiveSize(i), request->GetReceiveMemoryState(i)));
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}
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/* Cleanup Exchange mappings. */
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for (size_t i = 0; i < request->GetExchangeCount(); ++i) {
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R_TRY(server_page_table.CleanupForIpcServer(request->GetExchangeServerAddress(i), request->GetExchangeSize(i), request->GetExchangeMemoryState(i)));
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}
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R_SUCCEED();
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}
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ALWAYS_INLINE Result CleanupClientMap(KSessionRequest *request, KProcessPageTable *client_page_table) {
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/* If there's no client page table, there's nothing to clean up. */
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R_SUCCEED_IF(client_page_table == nullptr);
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/* Cleanup Send mappings. */
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for (size_t i = 0; i < request->GetSendCount(); ++i) {
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R_TRY(client_page_table->CleanupForIpcClient(request->GetSendClientAddress(i), request->GetSendSize(i), request->GetSendMemoryState(i)));
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}
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/* Cleanup Receive mappings. */
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for (size_t i = 0; i < request->GetReceiveCount(); ++i) {
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R_TRY(client_page_table->CleanupForIpcClient(request->GetReceiveClientAddress(i), request->GetReceiveSize(i), request->GetReceiveMemoryState(i)));
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}
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/* Cleanup Exchange mappings. */
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|
for (size_t i = 0; i < request->GetExchangeCount(); ++i) {
|
|
R_TRY(client_page_table->CleanupForIpcClient(request->GetExchangeClientAddress(i), request->GetExchangeSize(i), request->GetExchangeMemoryState(i)));
|
|
}
|
|
|
|
R_SUCCEED();
|
|
}
|
|
|
|
ALWAYS_INLINE Result CleanupMap(KSessionRequest *request, KProcess *server_process, KProcessPageTable *client_page_table) {
|
|
/* Cleanup the server map. */
|
|
R_TRY(CleanupServerMap(request, server_process));
|
|
|
|
/* Cleanup the client map. */
|
|
R_TRY(CleanupClientMap(request, client_page_table));
|
|
|
|
R_SUCCEED();
|
|
}
|
|
|
|
ALWAYS_INLINE Result ProcessReceiveMessageMapAliasDescriptors(int &offset, KProcessPageTable &dst_page_table, KProcessPageTable &src_page_table, const ipc::MessageBuffer &dst_msg, const ipc::MessageBuffer &src_msg, KSessionRequest *request, KMemoryPermission perm, bool send) {
|
|
/* Get the offset at the start of processing. */
|
|
const int cur_offset = offset;
|
|
|
|
/* Get the map alias descriptor. */
|
|
ipc::MessageBuffer::MapAliasDescriptor src_desc(src_msg, cur_offset);
|
|
offset += ipc::MessageBuffer::MapAliasDescriptor::GetDataSize() / sizeof(u32);
|
|
|
|
/* Extract address/size. */
|
|
const KProcessAddress src_address = src_desc.GetAddress();
|
|
const size_t size = src_desc.GetSize();
|
|
KProcessAddress dst_address = 0;
|
|
|
|
/* Determine the result memory state. */
|
|
KMemoryState dst_state;
|
|
R_TRY(GetMapAliasMemoryState(dst_state, src_desc.GetAttribute()));
|
|
|
|
/* Process the buffer, if it has a size. */
|
|
if (size > 0) {
|
|
/* Set up the source pages for ipc. */
|
|
R_TRY(dst_page_table.SetupForIpc(std::addressof(dst_address), size, src_address, src_page_table, perm, dst_state, send));
|
|
|
|
/* Ensure that we clean up on failure. */
|
|
ON_RESULT_FAILURE {
|
|
dst_page_table.CleanupForIpcServer(dst_address, size, dst_state);
|
|
src_page_table.CleanupForIpcClient(src_address, size, dst_state);
|
|
};
|
|
|
|
/* Push the appropriate mapping. */
|
|
if (perm == KMemoryPermission_UserRead) {
|
|
R_TRY(request->PushSend(src_address, dst_address, size, dst_state));
|
|
} else if (send) {
|
|
R_TRY(request->PushExchange(src_address, dst_address, size, dst_state));
|
|
} else {
|
|
R_TRY(request->PushReceive(src_address, dst_address, size, dst_state));
|
|
}
|
|
}
|
|
|
|
/* Set the output descriptor. */
|
|
dst_msg.Set(cur_offset, ipc::MessageBuffer::MapAliasDescriptor(GetVoidPointer(dst_address), size, src_desc.GetAttribute()));
|
|
|
|
R_SUCCEED();
|
|
}
|
|
|
|
ALWAYS_INLINE Result ReceiveMessage(bool &recv_list_broken, uintptr_t dst_message_buffer, size_t dst_buffer_size, KPhysicalAddress dst_message_paddr, KThread &src_thread, uintptr_t src_message_buffer, size_t src_buffer_size, KServerSession *session, KSessionRequest *request) {
|
|
/* Prepare variables for receive. */
|
|
const KThread &dst_thread = GetCurrentThread();
|
|
KProcess &dst_process = *(dst_thread.GetOwnerProcess());
|
|
KProcess &src_process = *(src_thread.GetOwnerProcess());
|
|
auto &dst_page_table = dst_process.GetPageTable();
|
|
auto &src_page_table = src_process.GetPageTable();
|
|
|
|
/* NOTE: Session is used only for debugging, and so may go unused. */
|
|
MESOSPHERE_UNUSED(session);
|
|
|
|
/* The receive list is initially not broken. */
|
|
recv_list_broken = false;
|
|
|
|
/* Set the server process for the request. */
|
|
request->SetServerProcess(std::addressof(dst_process));
|
|
|
|
/* Determine the message buffers. */
|
|
u32 *dst_msg_ptr, *src_msg_ptr;
|
|
bool dst_user, src_user;
|
|
|
|
if (dst_message_buffer) {
|
|
dst_msg_ptr = GetPointer<u32>(KPageTable::GetHeapVirtualAddress(dst_message_paddr));
|
|
dst_user = true;
|
|
} else {
|
|
dst_msg_ptr = static_cast<ams::svc::ThreadLocalRegion *>(dst_thread.GetThreadLocalRegionHeapAddress())->message_buffer;
|
|
dst_buffer_size = sizeof(ams::svc::ThreadLocalRegion{}.message_buffer);
|
|
dst_message_buffer = GetInteger(dst_thread.GetThreadLocalRegionAddress());
|
|
dst_user = false;
|
|
}
|
|
|
|
if (src_message_buffer) {
|
|
/* NOTE: Nintendo does not check the result of this GetPhysicalAddress call. */
|
|
KPhysicalAddress src_message_paddr;
|
|
src_page_table.GetPhysicalAddress(std::addressof(src_message_paddr), src_message_buffer);
|
|
|
|
src_msg_ptr = GetPointer<u32>(KPageTable::GetHeapVirtualAddress(src_message_paddr));
|
|
src_user = true;
|
|
} else {
|
|
src_msg_ptr = static_cast<ams::svc::ThreadLocalRegion *>(src_thread.GetThreadLocalRegionHeapAddress())->message_buffer;
|
|
src_buffer_size = sizeof(ams::svc::ThreadLocalRegion{}.message_buffer);
|
|
src_message_buffer = GetInteger(src_thread.GetThreadLocalRegionAddress());
|
|
src_user = false;
|
|
}
|
|
|
|
/* Parse the headers. */
|
|
const ipc::MessageBuffer dst_msg(dst_msg_ptr, dst_buffer_size);
|
|
const ipc::MessageBuffer src_msg(src_msg_ptr, src_buffer_size);
|
|
const ipc::MessageBuffer::MessageHeader dst_header(dst_msg);
|
|
const ipc::MessageBuffer::MessageHeader src_header(src_msg);
|
|
const ipc::MessageBuffer::SpecialHeader dst_special_header(dst_msg, dst_header);
|
|
const ipc::MessageBuffer::SpecialHeader src_special_header(src_msg, src_header);
|
|
|
|
/* Get the end of the source message. */
|
|
const size_t src_end_offset = ipc::MessageBuffer::GetRawDataIndex(src_header, src_special_header) + src_header.GetRawCount();
|
|
|
|
/* Ensure that the headers fit. */
|
|
R_UNLESS(ipc::MessageBuffer::GetMessageBufferSize(dst_header, dst_special_header) <= dst_buffer_size, svc::ResultInvalidCombination());
|
|
R_UNLESS(ipc::MessageBuffer::GetMessageBufferSize(src_header, src_special_header) <= src_buffer_size, svc::ResultInvalidCombination());
|
|
|
|
/* Ensure the receive list offset is after the end of raw data. */
|
|
if (dst_header.GetReceiveListOffset()) {
|
|
R_UNLESS(dst_header.GetReceiveListOffset() >= ipc::MessageBuffer::GetRawDataIndex(dst_header, dst_special_header) + dst_header.GetRawCount(), svc::ResultInvalidCombination());
|
|
}
|
|
|
|
/* Ensure that the destination buffer is big enough to receive the source. */
|
|
R_UNLESS(dst_buffer_size >= src_end_offset * sizeof(u32), svc::ResultMessageTooLarge());
|
|
|
|
/* Get the receive list. */
|
|
const s32 dst_recv_list_idx = ipc::MessageBuffer::GetReceiveListIndex(dst_header, dst_special_header);
|
|
ReceiveList dst_recv_list(dst_msg_ptr, dst_message_buffer, dst_page_table, dst_header, dst_special_header, dst_buffer_size, src_end_offset, dst_recv_list_idx, !dst_user);
|
|
|
|
/* Ensure that the source special header isn't invalid. */
|
|
const bool src_has_special_header = src_header.GetHasSpecialHeader();
|
|
if (src_has_special_header) {
|
|
/* Sending move handles from client -> server is not allowed. */
|
|
R_UNLESS(src_special_header.GetMoveHandleCount() == 0, svc::ResultInvalidCombination());
|
|
}
|
|
|
|
/* Prepare for further processing. */
|
|
int pointer_key = 0;
|
|
int offset = dst_msg.Set(src_header);
|
|
|
|
/* Set up a guard to make sure that we end up in a clean state on error. */
|
|
ON_RESULT_FAILURE {
|
|
/* Cleanup mappings. */
|
|
CleanupMap(request, std::addressof(dst_process), std::addressof(src_page_table));
|
|
|
|
/* Cleanup special data. */
|
|
if (src_header.GetHasSpecialHeader()) {
|
|
CleanupSpecialData(dst_process, dst_msg_ptr, dst_buffer_size);
|
|
}
|
|
|
|
/* Cleanup the header if the receive list isn't broken. */
|
|
if (!recv_list_broken) {
|
|
dst_msg.Set(dst_header);
|
|
if (dst_header.GetHasSpecialHeader()) {
|
|
dst_msg.Set(dst_special_header);
|
|
}
|
|
}
|
|
};
|
|
|
|
/* Process any special data. */
|
|
if (src_header.GetHasSpecialHeader()) {
|
|
/* After we process, make sure we track whether the receive list is broken. */
|
|
ON_SCOPE_EXIT { if (offset > dst_recv_list_idx) { recv_list_broken = true; } };
|
|
|
|
/* Process special data. */
|
|
R_TRY(ProcessMessageSpecialData<false>(offset, dst_process, src_process, src_thread, dst_msg, src_msg, src_special_header));
|
|
}
|
|
|
|
/* Process any pointer buffers. */
|
|
for (auto i = 0; i < src_header.GetPointerCount(); ++i) {
|
|
/* After we process, make sure we track whether the receive list is broken. */
|
|
ON_SCOPE_EXIT { if (offset > dst_recv_list_idx) { recv_list_broken = true; } };
|
|
|
|
R_TRY(ProcessReceiveMessagePointerDescriptors(offset, pointer_key, dst_page_table, src_page_table, dst_msg, src_msg, dst_recv_list, dst_user && dst_header.GetReceiveListCount() == ipc::MessageBuffer::MessageHeader::ReceiveListCountType_ToMessageBuffer));
|
|
}
|
|
|
|
/* Process any map alias buffers. */
|
|
for (auto i = 0; i < src_header.GetMapAliasCount(); ++i) {
|
|
/* After we process, make sure we track whether the receive list is broken. */
|
|
ON_SCOPE_EXIT { if (offset > dst_recv_list_idx) { recv_list_broken = true; } };
|
|
|
|
/* We process in order send, recv, exch. Buffers after send (recv/exch) are ReadWrite. */
|
|
const KMemoryPermission perm = (i >= src_header.GetSendCount()) ? KMemoryPermission_UserReadWrite : KMemoryPermission_UserRead;
|
|
|
|
/* Buffer is send if it is send or exch. */
|
|
const bool send = (i < src_header.GetSendCount()) || (i >= src_header.GetSendCount() + src_header.GetReceiveCount());
|
|
|
|
R_TRY(ProcessReceiveMessageMapAliasDescriptors(offset, dst_page_table, src_page_table, dst_msg, src_msg, request, perm, send));
|
|
}
|
|
|
|
/* Process any raw data. */
|
|
if (const auto raw_count = src_header.GetRawCount(); raw_count != 0) {
|
|
/* After we process, make sure we track whether the receive list is broken. */
|
|
ON_SCOPE_EXIT { if (offset + raw_count > dst_recv_list_idx) { recv_list_broken = true; } };
|
|
|
|
/* Get the offset and size. */
|
|
const size_t offset_words = offset * sizeof(u32);
|
|
const size_t raw_size = raw_count * sizeof(u32);
|
|
|
|
/* Fast case is TLS -> TLS, do raw memcpy if we can. */
|
|
if (!dst_user && !src_user) {
|
|
std::memcpy(dst_msg_ptr + offset, src_msg_ptr + offset, raw_size);
|
|
} else if (dst_user) {
|
|
/* Determine how much fast size we can copy. */
|
|
const size_t max_fast_size = std::min<size_t>(offset_words + raw_size, PageSize);
|
|
const size_t fast_size = max_fast_size - offset_words;
|
|
|
|
/* Determine the source permission. User buffer should be unmapped + read, TLS should be user readable. */
|
|
const KMemoryPermission src_perm = static_cast<KMemoryPermission>(src_user ? KMemoryPermission_NotMapped | KMemoryPermission_KernelRead : KMemoryPermission_UserRead);
|
|
|
|
/* Perform the fast part of the copy. */
|
|
R_TRY(src_page_table.CopyMemoryFromLinearToKernel(reinterpret_cast<uintptr_t>(dst_msg_ptr) + offset_words, fast_size, src_message_buffer + offset_words,
|
|
KMemoryState_FlagReferenceCounted, KMemoryState_FlagReferenceCounted,
|
|
src_perm,
|
|
KMemoryAttribute_Uncached, KMemoryAttribute_None));
|
|
|
|
/* If the fast part of the copy didn't get everything, perform the slow part of the copy. */
|
|
if (fast_size < raw_size) {
|
|
R_TRY(src_page_table.CopyMemoryFromHeapToHeap(dst_page_table, dst_message_buffer + max_fast_size, raw_size - fast_size,
|
|
KMemoryState_FlagReferenceCounted, KMemoryState_FlagReferenceCounted,
|
|
static_cast<KMemoryPermission>(KMemoryPermission_NotMapped | KMemoryPermission_KernelReadWrite),
|
|
KMemoryAttribute_Uncached | KMemoryAttribute_Locked, KMemoryAttribute_Locked,
|
|
src_message_buffer + max_fast_size,
|
|
KMemoryState_FlagReferenceCounted, KMemoryState_FlagReferenceCounted,
|
|
src_perm,
|
|
KMemoryAttribute_Uncached, KMemoryAttribute_None));
|
|
}
|
|
} else /* if (src_user) */ {
|
|
/* The source is a user buffer, so it should be unmapped + readable. */
|
|
constexpr KMemoryPermission SourcePermission = static_cast<KMemoryPermission>(KMemoryPermission_NotMapped | KMemoryPermission_KernelRead);
|
|
|
|
/* Copy the memory. */
|
|
R_TRY(src_page_table.CopyMemoryFromLinearToUser(dst_message_buffer + offset_words, raw_size, src_message_buffer + offset_words,
|
|
KMemoryState_FlagReferenceCounted, KMemoryState_FlagReferenceCounted,
|
|
SourcePermission,
|
|
KMemoryAttribute_Uncached, KMemoryAttribute_None));
|
|
}
|
|
}
|
|
|
|
/* We succeeded! */
|
|
R_SUCCEED();
|
|
}
|
|
|
|
ALWAYS_INLINE Result ProcessSendMessageReceiveMapping(KProcessPageTable &dst_page_table, KProcessAddress client_address, KProcessAddress server_address, size_t size, KMemoryState src_state) {
|
|
/* If the size is zero, there's nothing to process. */
|
|
R_SUCCEED_IF(size == 0);
|
|
|
|
/* Get the memory state and attribute mask to test. */
|
|
u32 test_state;
|
|
u32 test_attr_mask;
|
|
R_TRY(GetMapAliasTestStateAndAttributeMask(test_state, test_attr_mask, src_state));
|
|
|
|
/* Determine buffer extents. */
|
|
KProcessAddress aligned_dst_start = util::AlignDown(GetInteger(client_address), PageSize);
|
|
KProcessAddress aligned_dst_end = util::AlignUp(GetInteger(client_address) + size, PageSize);
|
|
KProcessAddress mapping_dst_start = util::AlignUp(GetInteger(client_address), PageSize);
|
|
KProcessAddress mapping_dst_end = util::AlignDown(GetInteger(client_address) + size, PageSize);
|
|
|
|
KProcessAddress mapping_src_end = util::AlignDown(GetInteger(server_address) + size, PageSize);
|
|
|
|
/* If the start of the buffer is unaligned, handle that. */
|
|
if (aligned_dst_start != mapping_dst_start) {
|
|
MESOSPHERE_ASSERT(client_address < mapping_dst_start);
|
|
const size_t copy_size = std::min<size_t>(size, mapping_dst_start - client_address);
|
|
R_TRY(dst_page_table.CopyMemoryFromUserToLinear(client_address, copy_size,
|
|
test_state, test_state,
|
|
KMemoryPermission_UserReadWrite,
|
|
test_attr_mask, KMemoryAttribute_None,
|
|
server_address));
|
|
}
|
|
|
|
/* If the end of the buffer is unaligned, handle that. */
|
|
if (mapping_dst_end < aligned_dst_end && (aligned_dst_start == mapping_dst_start || aligned_dst_start < mapping_dst_end)) {
|
|
const size_t copy_size = client_address + size - mapping_dst_end;
|
|
R_TRY(dst_page_table.CopyMemoryFromUserToLinear(mapping_dst_end, copy_size,
|
|
test_state, test_state,
|
|
KMemoryPermission_UserReadWrite,
|
|
test_attr_mask, KMemoryAttribute_None,
|
|
mapping_src_end));
|
|
}
|
|
|
|
R_SUCCEED();
|
|
}
|
|
|
|
ALWAYS_INLINE Result ProcessSendMessagePointerDescriptors(int &offset, int &pointer_key, KProcessPageTable &dst_page_table, const ipc::MessageBuffer &dst_msg, const ipc::MessageBuffer &src_msg, const ReceiveList &dst_recv_list, bool dst_user) {
|
|
/* Get the offset at the start of processing. */
|
|
const int cur_offset = offset;
|
|
|
|
/* Get the pointer desc. */
|
|
ipc::MessageBuffer::PointerDescriptor src_desc(src_msg, cur_offset);
|
|
offset += ipc::MessageBuffer::PointerDescriptor::GetDataSize() / sizeof(u32);
|
|
|
|
/* Extract address/size. */
|
|
const uintptr_t src_pointer = src_desc.GetAddress();
|
|
const size_t recv_size = src_desc.GetSize();
|
|
uintptr_t recv_pointer = 0;
|
|
|
|
/* Process the buffer, if it has a size. */
|
|
if (recv_size > 0) {
|
|
/* If using indexing, set index. */
|
|
if (dst_recv_list.IsIndex()) {
|
|
pointer_key = src_desc.GetIndex();
|
|
}
|
|
|
|
/* Get the buffer. */
|
|
dst_recv_list.GetBuffer(recv_pointer, recv_size, pointer_key);
|
|
R_UNLESS(recv_pointer != 0, svc::ResultOutOfResource());
|
|
|
|
/* Perform the pointer data copy. */
|
|
const KMemoryPermission dst_perm = static_cast<KMemoryPermission>(dst_user ? KMemoryPermission_NotMapped | KMemoryPermission_KernelReadWrite : KMemoryPermission_UserReadWrite);
|
|
R_TRY(dst_page_table.CopyMemoryFromUserToLinear(recv_pointer, recv_size,
|
|
KMemoryState_FlagReferenceCounted, KMemoryState_FlagReferenceCounted,
|
|
dst_perm,
|
|
KMemoryAttribute_Uncached, KMemoryAttribute_None,
|
|
src_pointer));
|
|
}
|
|
|
|
/* Set the output descriptor. */
|
|
dst_msg.Set(cur_offset, ipc::MessageBuffer::PointerDescriptor(reinterpret_cast<void *>(recv_pointer), recv_size, src_desc.GetIndex()));
|
|
|
|
R_SUCCEED();
|
|
}
|
|
|
|
ALWAYS_INLINE Result SendMessage(uintptr_t src_message_buffer, size_t src_buffer_size, KPhysicalAddress src_message_paddr, KThread &dst_thread, uintptr_t dst_message_buffer, size_t dst_buffer_size, KServerSession *session, KSessionRequest *request) {
|
|
/* Prepare variables for send. */
|
|
KThread &src_thread = GetCurrentThread();
|
|
KProcess &dst_process = *(dst_thread.GetOwnerProcess());
|
|
KProcess &src_process = *(src_thread.GetOwnerProcess());
|
|
auto &dst_page_table = dst_process.GetPageTable();
|
|
auto &src_page_table = src_process.GetPageTable();
|
|
|
|
/* NOTE: Session is used only for debugging, and so may go unused. */
|
|
MESOSPHERE_UNUSED(session);
|
|
|
|
/* NOTE: Source page table is not used, and so may go unused. */
|
|
MESOSPHERE_UNUSED(src_page_table);
|
|
|
|
/* Determine the message buffers. */
|
|
u32 *dst_msg_ptr, *src_msg_ptr;
|
|
bool dst_user, src_user;
|
|
|
|
if (dst_message_buffer) {
|
|
/* NOTE: Nintendo does not check the result of this GetPhysicalAddress call. */
|
|
KPhysicalAddress dst_message_paddr;
|
|
dst_page_table.GetPhysicalAddress(std::addressof(dst_message_paddr), dst_message_buffer);
|
|
|
|
dst_msg_ptr = GetPointer<u32>(KPageTable::GetHeapVirtualAddress(dst_message_paddr));
|
|
dst_user = true;
|
|
} else {
|
|
dst_msg_ptr = static_cast<ams::svc::ThreadLocalRegion *>(dst_thread.GetThreadLocalRegionHeapAddress())->message_buffer;
|
|
dst_buffer_size = sizeof(ams::svc::ThreadLocalRegion{}.message_buffer);
|
|
dst_message_buffer = GetInteger(dst_thread.GetThreadLocalRegionAddress());
|
|
dst_user = false;
|
|
}
|
|
|
|
if (src_message_buffer) {
|
|
src_msg_ptr = GetPointer<u32>(KPageTable::GetHeapVirtualAddress(src_message_paddr));
|
|
src_user = true;
|
|
} else {
|
|
src_msg_ptr = static_cast<ams::svc::ThreadLocalRegion *>(src_thread.GetThreadLocalRegionHeapAddress())->message_buffer;
|
|
src_buffer_size = sizeof(ams::svc::ThreadLocalRegion{}.message_buffer);
|
|
src_message_buffer = GetInteger(src_thread.GetThreadLocalRegionAddress());
|
|
src_user = false;
|
|
}
|
|
|
|
/* Parse the headers. */
|
|
const ipc::MessageBuffer dst_msg(dst_msg_ptr, dst_buffer_size);
|
|
const ipc::MessageBuffer src_msg(src_msg_ptr, src_buffer_size);
|
|
const ipc::MessageBuffer::MessageHeader dst_header(dst_msg);
|
|
const ipc::MessageBuffer::MessageHeader src_header(src_msg);
|
|
const ipc::MessageBuffer::SpecialHeader dst_special_header(dst_msg, dst_header);
|
|
const ipc::MessageBuffer::SpecialHeader src_special_header(src_msg, src_header);
|
|
|
|
/* Get the end of the source message. */
|
|
const size_t src_end_offset = ipc::MessageBuffer::GetRawDataIndex(src_header, src_special_header) + src_header.GetRawCount();
|
|
|
|
/* Declare variables for processing. */
|
|
int offset = 0;
|
|
int pointer_key = 0;
|
|
bool processed_special_data = false;
|
|
|
|
/* Send the message. */
|
|
{
|
|
/* Make sure that we end up in a clean state on error. */
|
|
ON_RESULT_FAILURE {
|
|
/* Cleanup special data. */
|
|
if (processed_special_data) {
|
|
if (src_header.GetHasSpecialHeader()) {
|
|
CleanupSpecialData(dst_process, dst_msg_ptr, dst_buffer_size);
|
|
}
|
|
} else {
|
|
CleanupServerHandles(src_user ? src_message_buffer : 0, src_buffer_size, src_message_paddr);
|
|
}
|
|
|
|
/* Cleanup mappings. */
|
|
CleanupMap(request, std::addressof(src_process), std::addressof(dst_page_table));
|
|
};
|
|
|
|
/* Ensure that the headers fit. */
|
|
R_UNLESS(ipc::MessageBuffer::GetMessageBufferSize(src_header, src_special_header) <= src_buffer_size, svc::ResultInvalidCombination());
|
|
R_UNLESS(ipc::MessageBuffer::GetMessageBufferSize(dst_header, dst_special_header) <= dst_buffer_size, svc::ResultInvalidCombination());
|
|
|
|
/* Ensure the receive list offset is after the end of raw data. */
|
|
if (dst_header.GetReceiveListOffset()) {
|
|
R_UNLESS(dst_header.GetReceiveListOffset() >= ipc::MessageBuffer::GetRawDataIndex(dst_header, dst_special_header) + dst_header.GetRawCount(), svc::ResultInvalidCombination());
|
|
}
|
|
|
|
/* Ensure that the destination buffer is big enough to receive the source. */
|
|
R_UNLESS(dst_buffer_size >= src_end_offset * sizeof(u32), svc::ResultMessageTooLarge());
|
|
|
|
/* Replies must have no buffers. */
|
|
R_UNLESS(src_header.GetSendCount() == 0, svc::ResultInvalidCombination());
|
|
R_UNLESS(src_header.GetReceiveCount() == 0, svc::ResultInvalidCombination());
|
|
R_UNLESS(src_header.GetExchangeCount() == 0, svc::ResultInvalidCombination());
|
|
|
|
/* Get the receive list. */
|
|
const s32 dst_recv_list_idx = ipc::MessageBuffer::GetReceiveListIndex(dst_header, dst_special_header);
|
|
ReceiveList dst_recv_list(dst_msg_ptr, dst_message_buffer, dst_page_table, dst_header, dst_special_header, dst_buffer_size, src_end_offset, dst_recv_list_idx, !dst_user);
|
|
|
|
/* Handle any receive buffers. */
|
|
for (size_t i = 0; i < request->GetReceiveCount(); ++i) {
|
|
R_TRY(ProcessSendMessageReceiveMapping(dst_page_table, request->GetReceiveClientAddress(i), request->GetReceiveServerAddress(i), request->GetReceiveSize(i), request->GetReceiveMemoryState(i)));
|
|
}
|
|
|
|
/* Handle any exchange buffers. */
|
|
for (size_t i = 0; i < request->GetExchangeCount(); ++i) {
|
|
R_TRY(ProcessSendMessageReceiveMapping(dst_page_table, request->GetExchangeClientAddress(i), request->GetExchangeServerAddress(i), request->GetExchangeSize(i), request->GetExchangeMemoryState(i)));
|
|
}
|
|
|
|
/* Set the header. */
|
|
offset = dst_msg.Set(src_header);
|
|
|
|
/* Process any special data. */
|
|
MESOSPHERE_ASSERT(GetCurrentThreadPointer() == std::addressof(src_thread));
|
|
processed_special_data = true;
|
|
if (src_header.GetHasSpecialHeader()) {
|
|
R_TRY(ProcessMessageSpecialData<true>(offset, dst_process, src_process, src_thread, dst_msg, src_msg, src_special_header));
|
|
}
|
|
|
|
/* Process any pointer buffers. */
|
|
for (auto i = 0; i < src_header.GetPointerCount(); ++i) {
|
|
R_TRY(ProcessSendMessagePointerDescriptors(offset, pointer_key, dst_page_table, dst_msg, src_msg, dst_recv_list, dst_user && dst_header.GetReceiveListCount() == ipc::MessageBuffer::MessageHeader::ReceiveListCountType_ToMessageBuffer));
|
|
}
|
|
|
|
/* Clear any map alias buffers. */
|
|
for (auto i = 0; i < src_header.GetMapAliasCount(); ++i) {
|
|
offset = dst_msg.Set(offset, ipc::MessageBuffer::MapAliasDescriptor());
|
|
}
|
|
|
|
/* Process any raw data. */
|
|
if (const auto raw_count = src_header.GetRawCount(); raw_count != 0) {
|
|
/* Get the offset and size. */
|
|
const size_t offset_words = offset * sizeof(u32);
|
|
const size_t raw_size = raw_count * sizeof(u32);
|
|
|
|
/* Fast case is TLS -> TLS, do raw memcpy if we can. */
|
|
if (!dst_user && !src_user) {
|
|
std::memcpy(dst_msg_ptr + offset, src_msg_ptr + offset, raw_size);
|
|
} else if (src_user) {
|
|
/* Determine how much fast size we can copy. */
|
|
const size_t max_fast_size = std::min<size_t>(offset_words + raw_size, PageSize);
|
|
const size_t fast_size = max_fast_size - offset_words;
|
|
|
|
/* Determine the dst permission. User buffer should be unmapped + read, TLS should be user readable. */
|
|
const KMemoryPermission dst_perm = static_cast<KMemoryPermission>(dst_user ? KMemoryPermission_NotMapped | KMemoryPermission_KernelReadWrite : KMemoryPermission_UserReadWrite);
|
|
|
|
/* Perform the fast part of the copy. */
|
|
R_TRY(dst_page_table.CopyMemoryFromKernelToLinear(dst_message_buffer + offset_words, fast_size,
|
|
KMemoryState_FlagReferenceCounted, KMemoryState_FlagReferenceCounted,
|
|
dst_perm,
|
|
KMemoryAttribute_Uncached, KMemoryAttribute_None,
|
|
reinterpret_cast<uintptr_t>(src_msg_ptr) + offset_words));
|
|
|
|
/* If the fast part of the copy didn't get everything, perform the slow part of the copy. */
|
|
if (fast_size < raw_size) {
|
|
R_TRY(dst_page_table.CopyMemoryFromHeapToHeap(dst_page_table, dst_message_buffer + max_fast_size, raw_size - fast_size,
|
|
KMemoryState_FlagReferenceCounted, KMemoryState_FlagReferenceCounted,
|
|
dst_perm,
|
|
KMemoryAttribute_Uncached, KMemoryAttribute_None,
|
|
src_message_buffer + max_fast_size,
|
|
KMemoryState_FlagReferenceCounted, KMemoryState_FlagReferenceCounted,
|
|
static_cast<KMemoryPermission>(KMemoryPermission_NotMapped | KMemoryPermission_KernelRead),
|
|
KMemoryAttribute_Uncached | KMemoryAttribute_Locked, KMemoryAttribute_Locked));
|
|
}
|
|
} else /* if (dst_user) */ {
|
|
/* The destination is a user buffer, so it should be unmapped + readable. */
|
|
constexpr KMemoryPermission DestinationPermission = static_cast<KMemoryPermission>(KMemoryPermission_NotMapped | KMemoryPermission_KernelReadWrite);
|
|
|
|
/* Copy the memory. */
|
|
R_TRY(dst_page_table.CopyMemoryFromUserToLinear(dst_message_buffer + offset_words, raw_size,
|
|
KMemoryState_FlagReferenceCounted, KMemoryState_FlagReferenceCounted,
|
|
DestinationPermission,
|
|
KMemoryAttribute_Uncached, KMemoryAttribute_None,
|
|
src_message_buffer + offset_words));
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Perform (and validate) any remaining cleanup. */
|
|
R_RETURN(CleanupMap(request, std::addressof(src_process), std::addressof(dst_page_table)));
|
|
}
|
|
|
|
ALWAYS_INLINE void ReplyAsyncError(KProcess *to_process, uintptr_t to_msg_buf, size_t to_msg_buf_size, Result result) {
|
|
/* Convert the buffer to a physical address. */
|
|
KPhysicalAddress phys_addr;
|
|
to_process->GetPageTable().GetPhysicalAddress(std::addressof(phys_addr), KProcessAddress(to_msg_buf));
|
|
|
|
/* Convert the physical address to a linear pointer. */
|
|
u32 *to_msg = GetPointer<u32>(KPageTable::GetHeapVirtualAddress(phys_addr));
|
|
|
|
/* Set the error. */
|
|
ipc::MessageBuffer msg(to_msg, to_msg_buf_size);
|
|
msg.SetAsyncResult(result);
|
|
}
|
|
|
|
}
|
|
|
|
void KServerSession::Destroy() {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
|
|
m_parent->OnServerClosed();
|
|
|
|
this->CleanupRequests();
|
|
|
|
m_parent->Close();
|
|
}
|
|
|
|
Result KServerSession::ReceiveRequest(uintptr_t server_message, uintptr_t server_buffer_size, KPhysicalAddress server_message_paddr) {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
|
|
/* Lock the session. */
|
|
KScopedLightLock lk(m_lock);
|
|
|
|
/* Get the request and client thread. */
|
|
KSessionRequest *request;
|
|
KThread *client_thread;
|
|
{
|
|
KScopedSchedulerLock sl;
|
|
|
|
/* Ensure that we can service the request. */
|
|
R_UNLESS(!m_parent->IsClientClosed(), svc::ResultSessionClosed());
|
|
|
|
/* Ensure we aren't already servicing a request. */
|
|
R_UNLESS(m_current_request == nullptr, svc::ResultNotFound());
|
|
|
|
/* Ensure we have a request to service. */
|
|
R_UNLESS(!m_request_list.empty(), svc::ResultNotFound());
|
|
|
|
/* Pop the first request from the list. */
|
|
request = std::addressof(m_request_list.front());
|
|
m_request_list.pop_front();
|
|
|
|
/* Get the thread for the request. */
|
|
client_thread = request->GetThread();
|
|
R_UNLESS(client_thread != nullptr, svc::ResultSessionClosed());
|
|
|
|
/* Open the client thread. */
|
|
client_thread->Open();
|
|
}
|
|
ON_SCOPE_EXIT { client_thread->Close(); };
|
|
|
|
/* Set the request as our current. */
|
|
m_current_request = request;
|
|
|
|
/* Get the client address. */
|
|
uintptr_t client_message = request->GetAddress();
|
|
size_t client_buffer_size = request->GetSize();
|
|
bool recv_list_broken = false;
|
|
|
|
/* Receive the message. */
|
|
Result result = ReceiveMessage(recv_list_broken, server_message, server_buffer_size, server_message_paddr, *client_thread, client_message, client_buffer_size, this, request);
|
|
|
|
/* Handle cleanup on receive failure. */
|
|
if (R_FAILED(result)) {
|
|
/* Cache the result to return it to the client. */
|
|
const Result result_for_client = result;
|
|
|
|
/* Clear the current request. */
|
|
{
|
|
KScopedSchedulerLock sl;
|
|
MESOSPHERE_ASSERT(m_current_request == request);
|
|
m_current_request = nullptr;
|
|
if (!m_request_list.empty()) {
|
|
this->NotifyAvailable();
|
|
}
|
|
}
|
|
|
|
/* Reply to the client. */
|
|
{
|
|
/* After we reply, close our reference to the request. */
|
|
ON_SCOPE_EXIT { request->Close(); };
|
|
|
|
/* Get the event to check whether the request is async. */
|
|
if (KEvent *event = request->GetEvent(); event != nullptr) {
|
|
/* The client sent an async request. */
|
|
KProcess *client = client_thread->GetOwnerProcess();
|
|
auto &client_pt = client->GetPageTable();
|
|
|
|
/* Send the async result. */
|
|
if (R_FAILED(result_for_client)) {
|
|
ReplyAsyncError(client, client_message, client_buffer_size, result_for_client);
|
|
}
|
|
|
|
/* Unlock the client buffer. */
|
|
/* NOTE: Nintendo does not check the result of this. */
|
|
client_pt.UnlockForIpcUserBuffer(client_message, client_buffer_size);
|
|
|
|
/* Signal the event. */
|
|
event->Signal();
|
|
} else {
|
|
/* End the client thread's wait. */
|
|
KScopedSchedulerLock sl;
|
|
|
|
if (!client_thread->IsTerminationRequested()) {
|
|
client_thread->EndWait(result_for_client);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Set the server result. */
|
|
if (recv_list_broken) {
|
|
result = svc::ResultReceiveListBroken();
|
|
} else {
|
|
result = svc::ResultNotFound();
|
|
}
|
|
}
|
|
|
|
R_RETURN(result);
|
|
}
|
|
|
|
Result KServerSession::SendReply(uintptr_t server_message, uintptr_t server_buffer_size, KPhysicalAddress server_message_paddr) {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
|
|
/* Lock the session. */
|
|
KScopedLightLock lk(m_lock);
|
|
|
|
/* Get the request. */
|
|
KSessionRequest *request;
|
|
{
|
|
KScopedSchedulerLock sl;
|
|
|
|
/* Get the current request. */
|
|
request = m_current_request;
|
|
R_UNLESS(request != nullptr, svc::ResultInvalidState());
|
|
|
|
/* Clear the current request, since we're processing it. */
|
|
m_current_request = nullptr;
|
|
if (!m_request_list.empty()) {
|
|
this->NotifyAvailable();
|
|
}
|
|
}
|
|
|
|
/* Close reference to the request once we're done processing it. */
|
|
ON_SCOPE_EXIT { request->Close(); };
|
|
|
|
/* Extract relevant information from the request. */
|
|
const uintptr_t client_message = request->GetAddress();
|
|
const size_t client_buffer_size = request->GetSize();
|
|
KThread *client_thread = request->GetThread();
|
|
KEvent *event = request->GetEvent();
|
|
|
|
/* Check whether we're closed. */
|
|
const bool closed = (client_thread == nullptr || m_parent->IsClientClosed());
|
|
|
|
Result result;
|
|
if (!closed) {
|
|
/* If we're not closed, send the reply. */
|
|
result = SendMessage(server_message, server_buffer_size, server_message_paddr, *client_thread, client_message, client_buffer_size, this, request);
|
|
} else {
|
|
/* Otherwise, we'll need to do some cleanup. */
|
|
KProcess *server_process = request->GetServerProcess();
|
|
KProcess *client_process = (client_thread != nullptr) ? client_thread->GetOwnerProcess() : nullptr;
|
|
KProcessPageTable *client_page_table = (client_process != nullptr) ? std::addressof(client_process->GetPageTable()) : nullptr;
|
|
|
|
/* Cleanup server handles. */
|
|
result = CleanupServerHandles(server_message, server_buffer_size, server_message_paddr);
|
|
|
|
/* Cleanup mappings. */
|
|
Result cleanup_map_result = CleanupMap(request, server_process, client_page_table);
|
|
|
|
/* If we successfully cleaned up handles, use the map cleanup result as our result. */
|
|
if (R_SUCCEEDED(result)) {
|
|
result = cleanup_map_result;
|
|
}
|
|
}
|
|
|
|
/* Select a result for the client. */
|
|
Result client_result = result;
|
|
if (closed && R_SUCCEEDED(result)) {
|
|
result = svc::ResultSessionClosed();
|
|
client_result = svc::ResultSessionClosed();
|
|
} else {
|
|
result = ResultSuccess();
|
|
}
|
|
|
|
/* If there's a client thread, update it. */
|
|
if (client_thread != nullptr) {
|
|
if (event != nullptr) {
|
|
/* Get the client process/page table. */
|
|
KProcess *client_process = client_thread->GetOwnerProcess();
|
|
KProcessPageTable *client_page_table = std::addressof(client_process->GetPageTable());
|
|
|
|
/* If we need to, reply with an async error. */
|
|
if (R_FAILED(client_result)) {
|
|
ReplyAsyncError(client_process, client_message, client_buffer_size, client_result);
|
|
}
|
|
|
|
/* Unlock the client buffer. */
|
|
/* NOTE: Nintendo does not check the result of this. */
|
|
client_page_table->UnlockForIpcUserBuffer(client_message, client_buffer_size);
|
|
|
|
/* Signal the event. */
|
|
event->Signal();
|
|
} else {
|
|
/* End the client thread's wait. */
|
|
KScopedSchedulerLock sl;
|
|
|
|
if (!client_thread->IsTerminationRequested()) {
|
|
client_thread->EndWait(client_result);
|
|
}
|
|
}
|
|
}
|
|
|
|
R_RETURN(result);
|
|
}
|
|
|
|
Result KServerSession::OnRequest(KSessionRequest *request) {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
|
|
/* Create the wait queue. */
|
|
ThreadQueueImplForKServerSessionRequest wait_queue;
|
|
|
|
/* Handle the request. */
|
|
{
|
|
/* Lock the scheduler. */
|
|
KScopedSchedulerLock sl;
|
|
|
|
/* Ensure that we can handle new requests. */
|
|
R_UNLESS(!m_parent->IsServerClosed(), svc::ResultSessionClosed());
|
|
|
|
/* Check that we're not terminating. */
|
|
R_UNLESS(!GetCurrentThread().IsTerminationRequested(), svc::ResultTerminationRequested());
|
|
|
|
/* Get whether we're empty. */
|
|
const bool was_empty = m_request_list.empty();
|
|
|
|
/* Add the request to the list. */
|
|
request->Open();
|
|
m_request_list.push_back(*request);
|
|
|
|
/* If we were empty, signal. */
|
|
if (was_empty) {
|
|
this->NotifyAvailable();
|
|
}
|
|
|
|
/* If we have a request, this is asynchronous, and we don't need to wait. */
|
|
R_SUCCEED_IF(request->GetEvent() != nullptr);
|
|
|
|
/* This is a synchronous request, so we should wait for our request to complete. */
|
|
GetCurrentThread().BeginWait(std::addressof(wait_queue));
|
|
}
|
|
|
|
R_RETURN(GetCurrentThread().GetWaitResult());
|
|
}
|
|
|
|
bool KServerSession::IsSignaledImpl() const {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
MESOSPHERE_ASSERT(KScheduler::IsSchedulerLockedByCurrentThread());
|
|
|
|
/* If the client is closed, we're always signaled. */
|
|
if (m_parent->IsClientClosed()) {
|
|
return true;
|
|
}
|
|
|
|
/* Otherwise, we're signaled if we have a request and aren't handling one. */
|
|
return !m_request_list.empty() && m_current_request == nullptr;
|
|
}
|
|
|
|
bool KServerSession::IsSignaled() const {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
MESOSPHERE_ASSERT(KScheduler::IsSchedulerLockedByCurrentThread());
|
|
|
|
return this->IsSignaledImpl();
|
|
}
|
|
|
|
void KServerSession::CleanupRequests() {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
|
|
KScopedLightLock lk(m_lock);
|
|
|
|
/* Clean up any pending requests. */
|
|
while (true) {
|
|
/* Get the next request. */
|
|
KSessionRequest *request = nullptr;
|
|
{
|
|
KScopedSchedulerLock sl;
|
|
|
|
if (m_current_request) {
|
|
/* Choose the current request if we have one. */
|
|
request = m_current_request;
|
|
m_current_request = nullptr;
|
|
} else if (!m_request_list.empty()) {
|
|
/* Pop the request from the front of the list. */
|
|
request = std::addressof(m_request_list.front());
|
|
m_request_list.pop_front();
|
|
}
|
|
}
|
|
|
|
/* If there's no request, we're done. */
|
|
if (request == nullptr) {
|
|
break;
|
|
}
|
|
|
|
/* Close a reference to the request once it's cleaned up. */
|
|
ON_SCOPE_EXIT { request->Close(); };
|
|
|
|
/* Extract relevant information from the request. */
|
|
const uintptr_t client_message = request->GetAddress();
|
|
const size_t client_buffer_size = request->GetSize();
|
|
KThread *client_thread = request->GetThread();
|
|
KEvent *event = request->GetEvent();
|
|
|
|
KProcess *server_process = request->GetServerProcess();
|
|
KProcess *client_process = (client_thread != nullptr) ? client_thread->GetOwnerProcess() : nullptr;
|
|
KProcessPageTable *client_page_table = (client_process != nullptr) ? std::addressof(client_process->GetPageTable()) : nullptr;
|
|
|
|
/* Cleanup the mappings. */
|
|
Result result = CleanupMap(request, server_process, client_page_table);
|
|
|
|
/* If there's a client thread, update it. */
|
|
if (client_thread != nullptr) {
|
|
if (event != nullptr) {
|
|
/* We need to reply async. */
|
|
ReplyAsyncError(client_process, client_message, client_buffer_size, (R_SUCCEEDED(result) ? svc::ResultSessionClosed() : result));
|
|
|
|
/* Unlock the client buffer. */
|
|
/* NOTE: Nintendo does not check the result of this. */
|
|
client_page_table->UnlockForIpcUserBuffer(client_message, client_buffer_size);
|
|
|
|
/* Signal the event. */
|
|
event->Signal();
|
|
} else {
|
|
/* End the client thread's wait. */
|
|
KScopedSchedulerLock sl;
|
|
|
|
if (!client_thread->IsTerminationRequested()) {
|
|
client_thread->EndWait(R_SUCCEEDED(result) ? svc::ResultSessionClosed() : result);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void KServerSession::OnClientClosed() {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
|
|
KScopedLightLock lk(m_lock);
|
|
|
|
/* Handle any pending requests. */
|
|
KSessionRequest *prev_request = nullptr;
|
|
while (true) {
|
|
/* Declare variables for processing the request. */
|
|
KSessionRequest *request = nullptr;
|
|
KEvent *event = nullptr;
|
|
KThread *thread = nullptr;
|
|
bool cur_request = false;
|
|
bool terminate = false;
|
|
|
|
/* Get the next request. */
|
|
{
|
|
KScopedSchedulerLock sl;
|
|
|
|
if (m_current_request != nullptr && m_current_request != prev_request) {
|
|
/* Set the request, open a reference as we process it. */
|
|
request = m_current_request;
|
|
request->Open();
|
|
cur_request = true;
|
|
|
|
/* Get thread and event for the request. */
|
|
thread = request->GetThread();
|
|
event = request->GetEvent();
|
|
|
|
/* If the thread is terminating, handle that. */
|
|
if (thread->IsTerminationRequested()) {
|
|
request->ClearThread();
|
|
request->ClearEvent();
|
|
terminate = true;
|
|
}
|
|
|
|
prev_request = request;
|
|
} else if (!m_request_list.empty()) {
|
|
/* Pop the request from the front of the list. */
|
|
request = std::addressof(m_request_list.front());
|
|
m_request_list.pop_front();
|
|
|
|
/* Get thread and event for the request. */
|
|
thread = request->GetThread();
|
|
event = request->GetEvent();
|
|
}
|
|
}
|
|
|
|
/* If there are no requests, we're done. */
|
|
if (request == nullptr) {
|
|
break;
|
|
}
|
|
|
|
/* All requests must have threads. */
|
|
MESOSPHERE_ASSERT(thread != nullptr);
|
|
|
|
/* Ensure that we close the request when done. */
|
|
ON_SCOPE_EXIT { request->Close(); };
|
|
|
|
/* If we're terminating, close a reference to the thread and event. */
|
|
if (terminate) {
|
|
thread->Close();
|
|
if (event != nullptr) {
|
|
event->Close();
|
|
}
|
|
}
|
|
|
|
/* If we need to, reply. */
|
|
if (event != nullptr && !cur_request) {
|
|
/* There must be no mappings. */
|
|
MESOSPHERE_ASSERT(request->GetSendCount() == 0);
|
|
MESOSPHERE_ASSERT(request->GetReceiveCount() == 0);
|
|
MESOSPHERE_ASSERT(request->GetExchangeCount() == 0);
|
|
|
|
/* Get the process and page table. */
|
|
KProcess *client_process = thread->GetOwnerProcess();
|
|
auto &client_pt = client_process->GetPageTable();
|
|
|
|
/* Reply to the request. */
|
|
ReplyAsyncError(client_process, request->GetAddress(), request->GetSize(), svc::ResultSessionClosed());
|
|
|
|
/* Unlock the buffer. */
|
|
/* NOTE: Nintendo does not check the result of this. */
|
|
client_pt.UnlockForIpcUserBuffer(request->GetAddress(), request->GetSize());
|
|
|
|
/* Signal the event. */
|
|
event->Signal();
|
|
}
|
|
}
|
|
|
|
/* Notify. */
|
|
this->NotifyAvailable(svc::ResultSessionClosed());
|
|
}
|
|
|
|
void KServerSession::Dump() {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
|
|
KScopedLightLock lk(m_lock);
|
|
{
|
|
KScopedSchedulerLock sl;
|
|
MESOSPHERE_RELEASE_LOG("Dump Session %p\n", this);
|
|
|
|
/* Dump current request. */
|
|
bool has_request = false;
|
|
if (m_current_request != nullptr) {
|
|
KThread *thread = m_current_request->GetThread();
|
|
const s32 thread_id = thread != nullptr ? static_cast<s32>(thread->GetId()) : -1;
|
|
MESOSPHERE_RELEASE_LOG(" CurrentReq %p Thread=%p ID=%d\n", m_current_request, thread, thread_id);
|
|
has_request = true;
|
|
}
|
|
|
|
/* Dump all rqeuests in list. */
|
|
for (auto it = m_request_list.begin(); it != m_request_list.end(); ++it) {
|
|
KThread *thread = it->GetThread();
|
|
const s32 thread_id = thread != nullptr ? static_cast<s32>(thread->GetId()) : -1;
|
|
MESOSPHERE_RELEASE_LOG(" Req %p Thread=%p ID=%d\n", m_current_request, thread, thread_id);
|
|
has_request = true;
|
|
}
|
|
|
|
/* If we didn't have any requests, print so. */
|
|
if (!has_request) {
|
|
MESOSPHERE_RELEASE_LOG(" None\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
#pragma GCC pop_options
|