7cf7999e02
Currently only CopyHandle, MoveHandle and CallingPid descriptors are implemented.
93 lines
3.6 KiB
C++
93 lines
3.6 KiB
C++
// Copyright 2017 Citra Emulator Project
|
|
// Licensed under GPLv2 or any later version
|
|
// Refer to the license.txt file included.
|
|
|
|
#include "core/hle/ipc.h"
|
|
#include "core/hle/kernel/handle_table.h"
|
|
#include "core/hle/kernel/ipc.h"
|
|
#include "core/hle/kernel/kernel.h"
|
|
#include "core/hle/kernel/memory.h"
|
|
#include "core/hle/kernel/process.h"
|
|
#include "core/hle/kernel/thread.h"
|
|
#include "core/memory.h"
|
|
|
|
namespace Kernel {
|
|
|
|
ResultCode TranslateCommandBuffer(SharedPtr<Thread> src_thread, SharedPtr<Thread> dst_thread,
|
|
VAddr src_address, VAddr dst_address) {
|
|
|
|
auto& src_process = src_thread->owner_process;
|
|
|
|
IPC::Header header;
|
|
// TODO(Subv): Replace by Memory::Read32 when possible.
|
|
Memory::ReadBlock(*src_process, src_address, &header.raw, sizeof(header.raw));
|
|
|
|
size_t untranslated_size = 1u + header.normal_params_size;
|
|
size_t command_size = untranslated_size + header.translate_params_size;
|
|
|
|
// Note: The real kernel does not check that the command length fits into the IPC buffer area.
|
|
ASSERT(command_size <= IPC::COMMAND_BUFFER_LENGTH);
|
|
|
|
std::array<u32, IPC::COMMAND_BUFFER_LENGTH> cmd_buf;
|
|
Memory::ReadBlock(*src_process, src_address, cmd_buf.data(), command_size * sizeof(u32));
|
|
|
|
size_t i = untranslated_size;
|
|
while (i < command_size) {
|
|
u32 descriptor = cmd_buf[i];
|
|
i += 1;
|
|
|
|
switch (IPC::GetDescriptorType(descriptor)) {
|
|
case IPC::DescriptorType::CopyHandle:
|
|
case IPC::DescriptorType::MoveHandle: {
|
|
u32 num_handles = IPC::HandleNumberFromDesc(descriptor);
|
|
// Note: The real kernel does not check that the number of handles fits into the command
|
|
// buffer before writing them, only after finishing.
|
|
if (i + num_handles > command_size) {
|
|
return ResultCode(ErrCodes::CommandTooLarge, ErrorModule::OS,
|
|
ErrorSummary::InvalidState, ErrorLevel::Status);
|
|
}
|
|
|
|
for (u32 j = 0; j < num_handles; ++j) {
|
|
Handle handle = cmd_buf[i];
|
|
SharedPtr<Object> object = nullptr;
|
|
// Perform pseudo-handle detection here because by the time this function is called,
|
|
// the current thread and process are no longer the ones which created this IPC
|
|
// request, but the ones that are handling it.
|
|
if (handle == CurrentThread) {
|
|
object = src_thread;
|
|
} else if (handle == CurrentProcess) {
|
|
object = src_process;
|
|
} else if (handle != 0) {
|
|
object = g_handle_table.GetGeneric(handle);
|
|
if (descriptor == IPC::DescriptorType::MoveHandle) {
|
|
g_handle_table.Close(handle);
|
|
}
|
|
}
|
|
|
|
if (object == nullptr) {
|
|
// Note: The real kernel sets invalid translated handles to 0 in the target
|
|
// command buffer.
|
|
cmd_buf[i++] = 0;
|
|
continue;
|
|
}
|
|
|
|
auto result = g_handle_table.Create(std::move(object));
|
|
cmd_buf[i++] = result.ValueOr(0);
|
|
}
|
|
break;
|
|
}
|
|
case IPC::DescriptorType::CallingPid: {
|
|
cmd_buf[i++] = src_process->process_id;
|
|
break;
|
|
}
|
|
default:
|
|
UNIMPLEMENTED_MSG("Unsupported handle translation: 0x%08X", descriptor);
|
|
}
|
|
}
|
|
|
|
Memory::WriteBlock(*dst_thread->owner_process, dst_address, cmd_buf.data(),
|
|
command_size * sizeof(u32));
|
|
|
|
return RESULT_SUCCESS;
|
|
}
|
|
} // namespace Kernel
|