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kern/ipc: implement remaining KServerSession reply code

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This commit is contained in:
Michael Scire 2020-07-10 16:46:55 -07:00
parent d52655eaf1
commit 4ff10f3ce0
1 changed files with 95 additions and 2 deletions
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97
libraries/libmesosphere/source/kern_k_server_session.cpp
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@ -283,6 +283,27 @@ namespace ams::kern {
return ResultSuccess();
}
constexpr ALWAYS_INLINE Result GetMapAliasTestStateAndAttributeMask(u32 &out_state, u32 &out_attr_mask, KMemoryState state) {
switch (state) {
case KMemoryState_Ipc:
out_state = KMemoryState_FlagCanUseIpc;
out_attr_mask = KMemoryAttribute_AnyLocked | KMemoryAttribute_Uncached | KMemoryAttribute_DeviceShared | KMemoryAttribute_Locked;
break;
case KMemoryState_NonSecureIpc:
out_state = KMemoryState_FlagCanUseNonSecureIpc;
out_attr_mask = KMemoryAttribute_AnyLocked | KMemoryAttribute_Uncached | KMemoryAttribute_Locked;
break;
case KMemoryState_NonDeviceIpc:
out_state = KMemoryState_FlagCanUseNonDeviceIpc;
out_attr_mask = KMemoryAttribute_AnyLocked | KMemoryAttribute_Uncached | KMemoryAttribute_Locked;
break;
default:
return svc::ResultInvalidCombination();
}
return ResultSuccess();
}
ALWAYS_INLINE void CleanupSpecialData(KProcess &dst_process, u32 *dst_msg_ptr, size_t dst_buffer_size) {
/* Parse the message. */
const ipc::MessageBuffer dst_msg(dst_msg_ptr, dst_buffer_size);
@ -650,11 +671,83 @@ namespace ams::kern {
}
ALWAYS_INLINE Result ProcessSendMessageReceiveMapping(KProcessPageTable &dst_page_table, KProcessAddress client_address, KProcessAddress server_address, size_t size, KMemoryState src_state) {
MESOSPHERE_UNIMPLEMENTED();
/* 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));
}
return ResultSuccess();
}
ALWAYS_INLINE Result ProcessSendMessagePointerDescriptors(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) {
MESOSPHERE_UNIMPLEMENTED();
/* 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()));
return ResultSuccess();
}
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) {