kern: implement transfer memory (and SVCs)
This commit is contained in:
Michael Scire
@@ -21,36 +21,132 @@ namespace ams::kern::svc {
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namespace {
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constexpr bool IsValidTransferMemoryPermission(ams::svc::MemoryPermission perm) {
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switch (perm) {
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case ams::svc::MemoryPermission_None:
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case ams::svc::MemoryPermission_Read:
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case ams::svc::MemoryPermission_ReadWrite:
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return true;
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default:
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return false;
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}
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}
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Result MapTransferMemory(ams::svc::Handle trmem_handle, uintptr_t address, size_t size, ams::svc::MemoryPermission map_perm) {
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/* Validate the address/size. */
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R_UNLESS(util::IsAligned(address, PageSize), svc::ResultInvalidAddress());
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R_UNLESS(util::IsAligned(size, PageSize), svc::ResultInvalidSize());
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R_UNLESS(size > 0, svc::ResultInvalidSize());
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R_UNLESS((address < address + size), svc::ResultInvalidCurrentMemory());
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/* Validate the permission. */
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R_UNLESS(IsValidTransferMemoryPermission(map_perm), svc::ResultInvalidState());
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/* Get the transfer memory. */
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KScopedAutoObject trmem = GetCurrentProcess().GetHandleTable().GetObject<KTransferMemory>(trmem_handle);
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R_UNLESS(trmem.IsNotNull(), svc::ResultInvalidHandle());
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/* Verify that the mapping is in range. */
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R_UNLESS(GetCurrentProcess().GetPageTable().CanContain(address, size, KMemoryState_Transfered), svc::ResultInvalidMemoryRegion());
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/* Map the transfer memory. */
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R_TRY(trmem->Map(address, size, map_perm));
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/* We succeeded. */
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return ResultSuccess();
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}
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Result UnmapTransferMemory(ams::svc::Handle trmem_handle, uintptr_t address, size_t size) {
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/* Validate the address/size. */
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R_UNLESS(util::IsAligned(address, PageSize), svc::ResultInvalidAddress());
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R_UNLESS(util::IsAligned(size, PageSize), svc::ResultInvalidSize());
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R_UNLESS(size > 0, svc::ResultInvalidSize());
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R_UNLESS((address < address + size), svc::ResultInvalidCurrentMemory());
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/* Get the transfer memory. */
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KScopedAutoObject trmem = GetCurrentProcess().GetHandleTable().GetObject<KTransferMemory>(trmem_handle);
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R_UNLESS(trmem.IsNotNull(), svc::ResultInvalidHandle());
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/* Verify that the mapping is in range. */
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R_UNLESS(GetCurrentProcess().GetPageTable().CanContain(address, size, KMemoryState_Transfered), svc::ResultInvalidMemoryRegion());
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/* Unmap the transfer memory. */
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R_TRY(trmem->Unmap(address, size));
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return ResultSuccess();
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}
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Result CreateTransferMemory(ams::svc::Handle *out, uintptr_t address, size_t size, ams::svc::MemoryPermission map_perm) {
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/* Validate the size. */
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R_UNLESS(util::IsAligned(address, PageSize), svc::ResultInvalidAddress());
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R_UNLESS(util::IsAligned(size, PageSize), svc::ResultInvalidSize());
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R_UNLESS(size > 0, svc::ResultInvalidSize());
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R_UNLESS((address < address + size), svc::ResultInvalidCurrentMemory());
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/* Validate the permissions. */
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R_UNLESS(IsValidTransferMemoryPermission(map_perm), svc::ResultInvalidNewMemoryPermission());
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/* Get the current process and handle table. */
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auto &process = GetCurrentProcess();
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auto &handle_table = process.GetHandleTable();
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/* Reserve a new transfer memory from the process resource limit. */
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KScopedResourceReservation trmem_reservation(std::addressof(process), ams::svc::LimitableResource_TransferMemoryCountMax);
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R_UNLESS(trmem_reservation.Succeeded(), svc::ResultLimitReached());
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/* Create the transfer memory. */
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KTransferMemory *trmem = KTransferMemory::Create();
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R_UNLESS(trmem != nullptr, svc::ResultOutOfResource());
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/* Ensure the only reference is in the handle table when we're done. */
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ON_SCOPE_EXIT { trmem->Close(); };
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/* Ensure that the region is in range. */
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R_UNLESS(process.GetPageTable().Contains(address, size), svc::ResultInvalidCurrentMemory());
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/* Initialize the transfer memory. */
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R_TRY(trmem->Initialize(address, size, map_perm));
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/* Commit the reservation. */
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trmem_reservation.Commit();
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/* Register the transfer memory. */
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R_TRY(KTransferMemory::Register(trmem));
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/* Add the transfer memory to the handle table. */
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R_TRY(handle_table.Add(out, trmem));
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return ResultSuccess();
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}
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}
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/* ============================= 64 ABI ============================= */
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Result MapTransferMemory64From32(ams::svc::Handle trmem_handle, ams::svc::Address address, ams::svc::Size size, ams::svc::MemoryPermission owner_perm) {
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MESOSPHERE_PANIC("Stubbed SvcMapTransferMemory64From32 was called.");
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Result MapTransferMemory64(ams::svc::Handle trmem_handle, ams::svc::Address address, ams::svc::Size size, ams::svc::MemoryPermission owner_perm) {
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return MapTransferMemory(trmem_handle, address, size, owner_perm);
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}
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Result UnmapTransferMemory64From32(ams::svc::Handle trmem_handle, ams::svc::Address address, ams::svc::Size size) {
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MESOSPHERE_PANIC("Stubbed SvcUnmapTransferMemory64From32 was called.");
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Result UnmapTransferMemory64(ams::svc::Handle trmem_handle, ams::svc::Address address, ams::svc::Size size) {
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return UnmapTransferMemory(trmem_handle, address, size);
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}
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Result CreateTransferMemory64(ams::svc::Handle *out_handle, ams::svc::Address address, ams::svc::Size size, ams::svc::MemoryPermission map_perm) {
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MESOSPHERE_PANIC("Stubbed SvcCreateTransferMemory64 was called.");
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return CreateTransferMemory(out_handle, address, size, map_perm);
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}
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/* ============================= 64From32 ABI ============================= */
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Result MapTransferMemory64(ams::svc::Handle trmem_handle, ams::svc::Address address, ams::svc::Size size, ams::svc::MemoryPermission owner_perm) {
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MESOSPHERE_PANIC("Stubbed SvcMapTransferMemory64 was called.");
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Result MapTransferMemory64From32(ams::svc::Handle trmem_handle, ams::svc::Address address, ams::svc::Size size, ams::svc::MemoryPermission owner_perm) {
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return MapTransferMemory(trmem_handle, address, size, owner_perm);
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}
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Result UnmapTransferMemory64(ams::svc::Handle trmem_handle, ams::svc::Address address, ams::svc::Size size) {
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MESOSPHERE_PANIC("Stubbed SvcUnmapTransferMemory64 was called.");
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Result UnmapTransferMemory64From32(ams::svc::Handle trmem_handle, ams::svc::Address address, ams::svc::Size size) {
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return UnmapTransferMemory(trmem_handle, address, size);
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}
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Result CreateTransferMemory64From32(ams::svc::Handle *out_handle, ams::svc::Address address, ams::svc::Size size, ams::svc::MemoryPermission map_perm) {
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MESOSPHERE_PANIC("Stubbed SvcCreateTransferMemory64From32 was called.");
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return CreateTransferMemory(out_handle, address, size, map_perm);
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}
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}
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