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hle: kernel: Improve MapSharedMemory and implement UnmapSharedMemory.

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This commit is contained in:
bunnei
2021-04-30 14:53:22 -07:00
parent 2a7eff57a8
commit 0b27c721c9
10 changed files with 222 additions and 107 deletions
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162
src/core/hle/kernel/svc.cpp
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@ -1183,79 +1183,97 @@ static u32 GetCurrentProcessorNumber32(Core::System& system) {
return GetCurrentProcessorNumber(system);
}
static ResultCode MapSharedMemory(Core::System& system, Handle shared_memory_handle, VAddr addr,
u64 size, u32 permissions) {
std::lock_guard lock{HLE::g_hle_lock};
LOG_TRACE(Kernel_SVC,
"called, shared_memory_handle=0x{:X}, addr=0x{:X}, size=0x{:X}, permissions=0x{:08X}",
shared_memory_handle, addr, size, permissions);
if (!Common::Is4KBAligned(addr)) {
LOG_ERROR(Kernel_SVC, "Address is not aligned to 4KB, addr=0x{:016X}", addr);
return ResultInvalidAddress;
constexpr bool IsValidSharedMemoryPermission(Svc::MemoryPermission perm) {
switch (perm) {
case Svc::MemoryPermission::Read:
case Svc::MemoryPermission::ReadWrite:
return true;
default:
return false;
}
if (size == 0) {
LOG_ERROR(Kernel_SVC, "Size is 0");
return ResultInvalidSize;
}
if (!Common::Is4KBAligned(size)) {
LOG_ERROR(Kernel_SVC, "Size is not aligned to 4KB, size=0x{:016X}", size);
return ResultInvalidSize;
}
if (!IsValidAddressRange(addr, size)) {
LOG_ERROR(Kernel_SVC, "Region is not a valid address range, addr=0x{:016X}, size=0x{:016X}",
addr, size);
return ResultInvalidCurrentMemory;
}
const auto permission_type = static_cast<MemoryPermission>(permissions);
if ((permission_type | MemoryPermission::Write) != MemoryPermission::ReadWrite) {
LOG_ERROR(Kernel_SVC, "Expected Read or ReadWrite permission but got permissions=0x{:08X}",
permissions);
return ResultInvalidNewMemoryPermission;
}
auto* const current_process{system.Kernel().CurrentProcess()};
auto& page_table{current_process->PageTable()};
if (page_table.IsInvalidRegion(addr, size)) {
LOG_ERROR(Kernel_SVC,
"Addr does not fit within the valid region, addr=0x{:016X}, "
"size=0x{:016X}",
addr, size);
return ResultInvalidMemoryRegion;
}
if (page_table.IsInsideHeapRegion(addr, size)) {
LOG_ERROR(Kernel_SVC,
"Addr does not fit within the heap region, addr=0x{:016X}, "
"size=0x{:016X}",
addr, size);
return ResultInvalidMemoryRegion;
}
if (page_table.IsInsideAliasRegion(addr, size)) {
LOG_ERROR(Kernel_SVC,
"Address does not fit within the map region, addr=0x{:016X}, "
"size=0x{:016X}",
addr, size);
return ResultInvalidMemoryRegion;
}
auto shared_memory{
current_process->GetHandleTable().GetObject<KSharedMemory>(shared_memory_handle)};
R_UNLESS(shared_memory.IsNotNull(), ResultInvalidHandle);
return shared_memory->Map(*current_process, addr, size,
static_cast<KMemoryPermission>(permission_type));
}
static ResultCode MapSharedMemory32(Core::System& system, Handle shared_memory_handle, u32 addr,
u32 size, u32 permissions) {
return MapSharedMemory(system, shared_memory_handle, addr, size, permissions);
constexpr bool IsValidRemoteSharedMemoryPermission(Svc::MemoryPermission perm) {
return IsValidSharedMemoryPermission(perm) || perm == Svc::MemoryPermission::DontCare;
}
static ResultCode MapSharedMemory(Core::System& system, Handle shmem_handle, VAddr address,
u64 size, Svc::MemoryPermission map_perm) {
LOG_TRACE(Kernel_SVC,
"called, shared_memory_handle=0x{:X}, addr=0x{:X}, size=0x{:X}, permissions=0x{:08X}",
shmem_handle, address, size, map_perm);
// Validate the address/size.
R_UNLESS(Common::IsAligned(address, PageSize), ResultInvalidAddress);
R_UNLESS(Common::IsAligned(size, PageSize), ResultInvalidSize);
R_UNLESS(size > 0, ResultInvalidSize);
R_UNLESS((address < address + size), ResultInvalidCurrentMemory);
// Validate the permission.
R_UNLESS(IsValidSharedMemoryPermission(map_perm), ResultInvalidNewMemoryPermission);
// Get the current process.
auto& process = *system.Kernel().CurrentProcess();
auto& page_table = process.PageTable();
// Get the shared memory.
KScopedAutoObject shmem = process.GetHandleTable().GetObject<KSharedMemory>(shmem_handle);
R_UNLESS(shmem.IsNotNull(), ResultInvalidHandle);
// Verify that the mapping is in range.
R_UNLESS(page_table.CanContain(address, size, KMemoryState::Shared), ResultInvalidMemoryRegion);
// Add the shared memory to the process.
R_TRY(process.AddSharedMemory(shmem.GetPointerUnsafe(), address, size));
// Ensure that we clean up the shared memory if we fail to map it.
auto guard =
SCOPE_GUARD({ process.RemoveSharedMemory(shmem.GetPointerUnsafe(), address, size); });
// Map the shared memory.
R_TRY(shmem->Map(process, address, size, map_perm));
// We succeeded.
guard.Cancel();
return RESULT_SUCCESS;
}
static ResultCode MapSharedMemory32(Core::System& system, Handle shmem_handle, u32 address,
u32 size, Svc::MemoryPermission map_perm) {
return MapSharedMemory(system, shmem_handle, address, size, map_perm);
}
static ResultCode UnmapSharedMemory(Core::System& system, Handle shmem_handle, VAddr address,
u64 size) {
// Validate the address/size.
R_UNLESS(Common::IsAligned(address, PageSize), ResultInvalidAddress);
R_UNLESS(Common::IsAligned(size, PageSize), ResultInvalidSize);
R_UNLESS(size > 0, ResultInvalidSize);
R_UNLESS((address < address + size), ResultInvalidCurrentMemory);
// Get the current process.
auto& process = *system.Kernel().CurrentProcess();
auto& page_table = process.PageTable();
// Get the shared memory.
KScopedAutoObject shmem = process.GetHandleTable().GetObject<KSharedMemory>(shmem_handle);
R_UNLESS(shmem.IsNotNull(), ResultInvalidHandle);
// Verify that the mapping is in range.
R_UNLESS(page_table.CanContain(address, size, KMemoryState::Shared), ResultInvalidMemoryRegion);
// Unmap the shared memory.
R_TRY(shmem->Unmap(process, address, size));
// Remove the shared memory from the process.
process.RemoveSharedMemory(shmem.GetPointerUnsafe(), address, size);
return RESULT_SUCCESS;
}
static ResultCode UnmapSharedMemory32(Core::System& system, Handle shmem_handle, u32 address,
u32 size) {
return UnmapSharedMemory(system, shmem_handle, address, size);
}
static ResultCode QueryProcessMemory(Core::System& system, VAddr memory_info_address,
@ -2297,7 +2315,7 @@ static const FunctionDef SVC_Table_32[] = {
{0x11, SvcWrap32<SignalEvent32>, "SignalEvent32"},
{0x12, SvcWrap32<ClearEvent32>, "ClearEvent32"},
{0x13, SvcWrap32<MapSharedMemory32>, "MapSharedMemory32"},
{0x14, nullptr, "UnmapSharedMemory32"},
{0x14, SvcWrap32<UnmapSharedMemory32>, "UnmapSharedMemory32"},
{0x15, SvcWrap32<CreateTransferMemory32>, "CreateTransferMemory32"},
{0x16, SvcWrap32<CloseHandle32>, "CloseHandle32"},
{0x17, SvcWrap32<ResetSignal32>, "ResetSignal32"},
@ -2492,7 +2510,7 @@ static const FunctionDef SVC_Table_64[] = {
{0x11, SvcWrap64<SignalEvent>, "SignalEvent"},
{0x12, SvcWrap64<ClearEvent>, "ClearEvent"},
{0x13, SvcWrap64<MapSharedMemory>, "MapSharedMemory"},
{0x14, nullptr, "UnmapSharedMemory"},
{0x14, SvcWrap64<UnmapSharedMemory>, "UnmapSharedMemory"},
{0x15, SvcWrap64<CreateTransferMemory>, "CreateTransferMemory"},
{0x16, SvcWrap64<CloseHandle>, "CloseHandle"},
{0x17, SvcWrap64<ResetSignal>, "ResetSignal"},