From 1bd0cf542ff8db1cda572c4d92462643296af121 Mon Sep 17 00:00:00 2001 From: Subv Date: Sun, 17 Apr 2016 21:07:52 -0500 Subject: [PATCH] Kernel/SharedMemory: Properly implemented shared memory support. Applications can request the kernel to allocate a piece of the linear heap for them when creating a shared memory object. Shared memory areas are now properly mapped into the target processes when calling svcMapMemoryBlock. Removed the APT Shared Font hack as it is no longer needed. --- src/core/hle/applets/mii_selector.cpp | 4 +- src/core/hle/applets/swkbd.cpp | 4 +- src/core/hle/kernel/shared_memory.cpp | 116 +++++++++++++------------- src/core/hle/kernel/shared_memory.h | 28 +++++-- src/core/hle/service/apt/apt.cpp | 38 +++------ src/core/hle/service/csnd_snd.cpp | 13 +-- src/core/hle/service/gsp_gpu.cpp | 5 +- src/core/hle/service/hid/hid.cpp | 5 +- src/core/hle/service/ir/ir.cpp | 5 +- src/core/hle/svc.cpp | 47 ++++++++--- 10 files changed, 147 insertions(+), 118 deletions(-) diff --git a/src/core/hle/applets/mii_selector.cpp b/src/core/hle/applets/mii_selector.cpp index b4456ca90..7f174f3e6 100644 --- a/src/core/hle/applets/mii_selector.cpp +++ b/src/core/hle/applets/mii_selector.cpp @@ -36,8 +36,8 @@ ResultCode MiiSelector::ReceiveParameter(const Service::APT::MessageParameter& p memcpy(&capture_info, parameter.data, sizeof(capture_info)); using Kernel::MemoryPermission; - framebuffer_memory = Kernel::SharedMemory::Create(capture_info.size, MemoryPermission::ReadWrite, - MemoryPermission::ReadWrite, "MiiSelector Memory"); + framebuffer_memory = Kernel::SharedMemory::Create(nullptr, capture_info.size, MemoryPermission::ReadWrite, + MemoryPermission::ReadWrite, 0, Kernel::MemoryRegion::BASE, "MiiSelector Memory"); // Send the response message with the newly created SharedMemory Service::APT::MessageParameter result; diff --git a/src/core/hle/applets/swkbd.cpp b/src/core/hle/applets/swkbd.cpp index 87238aa1c..e0c134182 100644 --- a/src/core/hle/applets/swkbd.cpp +++ b/src/core/hle/applets/swkbd.cpp @@ -40,8 +40,8 @@ ResultCode SoftwareKeyboard::ReceiveParameter(Service::APT::MessageParameter con memcpy(&capture_info, parameter.data, sizeof(capture_info)); using Kernel::MemoryPermission; - framebuffer_memory = Kernel::SharedMemory::Create(capture_info.size, MemoryPermission::ReadWrite, - MemoryPermission::ReadWrite, "SoftwareKeyboard Memory"); + framebuffer_memory = Kernel::SharedMemory::Create(nullptr, capture_info.size, MemoryPermission::ReadWrite, + MemoryPermission::ReadWrite, 0, Kernel::MemoryRegion::BASE, "SoftwareKeyboard Memory"); // Send the response message with the newly created SharedMemory Service::APT::MessageParameter result; diff --git a/src/core/hle/kernel/shared_memory.cpp b/src/core/hle/kernel/shared_memory.cpp index d90f0f00f..6f731f317 100644 --- a/src/core/hle/kernel/shared_memory.cpp +++ b/src/core/hle/kernel/shared_memory.cpp @@ -7,6 +7,7 @@ #include "common/logging/log.h" #include "core/memory.h" +#include "core/hle/kernel/memory.h" #include "core/hle/kernel/shared_memory.h" namespace Kernel { @@ -14,93 +15,94 @@ namespace Kernel { SharedMemory::SharedMemory() {} SharedMemory::~SharedMemory() {} -SharedPtr SharedMemory::Create(u32 size, MemoryPermission permissions, - MemoryPermission other_permissions, std::string name) { +SharedPtr SharedMemory::Create(SharedPtr owner_process, u32 size, MemoryPermission permissions, + MemoryPermission other_permissions, VAddr address, MemoryRegion region, std::string name) { SharedPtr shared_memory(new SharedMemory); + shared_memory->owner_process = owner_process; shared_memory->name = std::move(name); - shared_memory->base_address = 0x0; - shared_memory->fixed_address = 0x0; shared_memory->size = size; shared_memory->permissions = permissions; shared_memory->other_permissions = other_permissions; + if (address == 0) { + // We need to allocate a block from the Linear Heap ourselves. + // We'll manually allocate some memory from the linear heap in the specified region. + MemoryRegionInfo* memory_region = GetMemoryRegion(region); + auto& linheap_memory = memory_region->linear_heap_memory; + + ASSERT_MSG(linheap_memory->size() + size <= memory_region->size, "Not enough space in region to allocate shared memory!"); + + shared_memory->backing_block = linheap_memory; + shared_memory->backing_block_offset = linheap_memory->size(); + // Allocate some memory from the end of the linear heap for this region. + linheap_memory->insert(linheap_memory->end(), size, 0); + memory_region->used += size; + + shared_memory->linear_heap_phys_address = Memory::FCRAM_PADDR + memory_region->base + shared_memory->backing_block_offset; + + // Refresh the address mappings for the current process. + if (Kernel::g_current_process != nullptr) { + Kernel::g_current_process->vm_manager.RefreshMemoryBlockMappings(linheap_memory.get()); + } + } else { + auto& vm_manager = shared_memory->owner_process->vm_manager; + // The memory is already available and mapped in the owner process. + auto vma = vm_manager.FindVMA(address)->second; + // Copy it over to our own storage + shared_memory->backing_block = std::make_shared>(vma.backing_block->data() + vma.offset, + vma.backing_block->data() + vma.offset + size); + // Unmap the existing pages + vm_manager.UnmapRange(address, size); + // Map our own block into the address space + vm_manager.MapMemoryBlock(address, shared_memory->backing_block, 0, size, MemoryState::Shared); + } + + shared_memory->base_address = address; return shared_memory; } -ResultCode SharedMemory::Map(VAddr address, MemoryPermission permissions, +ResultCode SharedMemory::Map(Process* target_process, VAddr address, MemoryPermission permissions, MemoryPermission other_permissions) { - if (base_address != 0) { - LOG_ERROR(Kernel, "cannot map id=%u, address=0x%08X name=%s: already mapped at 0x%08X!", - GetObjectId(), address, name.c_str(), base_address); - // TODO: Verify error code with hardware - return ResultCode(ErrorDescription::InvalidAddress, ErrorModule::Kernel, - ErrorSummary::InvalidArgument, ErrorLevel::Permanent); - } - // TODO(Subv): Return E0E01BEE when permissions and other_permissions don't // match what was specified when the memory block was created. - // TODO(Subv): Return E0E01BEE when address should be 0. - // Note: Find out when that's the case. + // TODO(Subv): Check for the Shared Device Mem flag in the creator process. + /*if (was_created_with_shared_device_mem && address != 0) { + return ResultCode(ErrorDescription::InvalidCombination, ErrorModule::OS, ErrorSummary::InvalidArgument, ErrorLevel::Usage); + }*/ - if (fixed_address != 0) { - if (address != 0 && address != fixed_address) { - LOG_ERROR(Kernel, "cannot map id=%u, address=0x%08X name=%s: fixed_addres is 0x%08X!", - GetObjectId(), address, name.c_str(), fixed_address); - // TODO: Verify error code with hardware - return ResultCode(ErrorDescription::InvalidAddress, ErrorModule::Kernel, - ErrorSummary::InvalidArgument, ErrorLevel::Permanent); - } + // TODO(Subv): The same process that created a SharedMemory object + // can not map it in its own address space unless it was created with addr=0, result 0xD900182C. - // HACK(yuriks): This is only here to support the APT shared font mapping right now. - // Later, this should actually map the memory block onto the address space. - return RESULT_SUCCESS; - } - - if (address < Memory::SHARED_MEMORY_VADDR || address + size >= Memory::SHARED_MEMORY_VADDR_END) { - LOG_ERROR(Kernel, "cannot map id=%u, address=0x%08X name=%s outside of shared mem bounds!", + if (address < Memory::HEAP_VADDR || address + size >= Memory::SHARED_MEMORY_VADDR_END) { + LOG_ERROR(Kernel, "cannot map id=%u, address=0x%08X name=%s, invalid address", GetObjectId(), address, name.c_str()); - // TODO: Verify error code with hardware - return ResultCode(ErrorDescription::InvalidAddress, ErrorModule::Kernel, - ErrorSummary::InvalidArgument, ErrorLevel::Permanent); + return ResultCode(ErrorDescription::InvalidAddress, ErrorModule::OS, + ErrorSummary::InvalidArgument, ErrorLevel::Usage); } - // TODO: Test permissions + VAddr target_address = address; - // HACK: Since there's no way to write to the memory block without mapping it onto the game - // process yet, at least initialize memory the first time it's mapped. - if (address != this->base_address) { - std::memset(Memory::GetPointer(address), 0, size); + if (base_address == 0 && target_address == 0) { + // Calculate the address at which to map the memory block. + target_address = Memory::PhysicalToVirtualAddress(linear_heap_phys_address); } - this->base_address = address; + // Map the memory block into the target process + target_process->vm_manager.MapMemoryBlock(target_address, backing_block, backing_block_offset, size, MemoryState::Shared); return RESULT_SUCCESS; } -ResultCode SharedMemory::Unmap(VAddr address) { - if (base_address == 0) { - // TODO(Subv): Verify what actually happens when you want to unmap a memory block that - // was originally mapped with address = 0 - return ResultCode(ErrorDescription::InvalidAddress, ErrorModule::OS, ErrorSummary::InvalidArgument, ErrorLevel::Usage); - } - - if (base_address != address) - return ResultCode(ErrorDescription::WrongAddress, ErrorModule::OS, ErrorSummary::InvalidState, ErrorLevel::Usage); - - base_address = 0; - - return RESULT_SUCCESS; +ResultCode SharedMemory::Unmap(Process* target_process, VAddr address) { + // TODO(Subv): Verify what happens if the application tries to unmap an address that is not mapped to a SharedMemory. + return target_process->vm_manager.UnmapRange(address, size); } u8* SharedMemory::GetPointer(u32 offset) { - if (base_address != 0) - return Memory::GetPointer(base_address + offset); - - LOG_ERROR(Kernel_SVC, "memory block id=%u not mapped!", GetObjectId()); - return nullptr; + return backing_block->data() + backing_block_offset + offset; } } // namespace diff --git a/src/core/hle/kernel/shared_memory.h b/src/core/hle/kernel/shared_memory.h index b51049ad0..b442cb764 100644 --- a/src/core/hle/kernel/shared_memory.h +++ b/src/core/hle/kernel/shared_memory.h @@ -9,6 +9,7 @@ #include "common/common_types.h" #include "core/hle/kernel/kernel.h" +#include "core/hle/kernel/process.h" #include "core/hle/result.h" namespace Kernel { @@ -30,13 +31,16 @@ class SharedMemory final : public Object { public: /** * Creates a shared memory object + * @param owner_process Process that created this shared memory object. * @param size Size of the memory block. Must be page-aligned. * @param permissions Permission restrictions applied to the process which created the block. * @param other_permissions Permission restrictions applied to other processes mapping the block. + * @param address The address from which to map the Shared Memory. + * @param region If the address is 0, the shared memory will be allocated in this region of the linear heap. * @param name Optional object name, used for debugging purposes. */ - static SharedPtr Create(u32 size, MemoryPermission permissions, - MemoryPermission other_permissions, std::string name = "Unknown"); + static SharedPtr Create(SharedPtr owner_process, u32 size, MemoryPermission permissions, + MemoryPermission other_permissions, VAddr address = 0, MemoryRegion region = MemoryRegion::BASE, std::string name = "Unknown"); std::string GetTypeName() const override { return "SharedMemory"; } std::string GetName() const override { return name; } @@ -45,19 +49,21 @@ public: HandleType GetHandleType() const override { return HANDLE_TYPE; } /** - * Maps a shared memory block to an address in system memory + * Maps a shared memory block to an address in the target process' address space + * @param target_process Process on which to map the memory block. * @param address Address in system memory to map shared memory block to * @param permissions Memory block map permissions (specified by SVC field) * @param other_permissions Memory block map other permissions (specified by SVC field) */ - ResultCode Map(VAddr address, MemoryPermission permissions, MemoryPermission other_permissions); + ResultCode Map(Process* target_process, VAddr address, MemoryPermission permissions, MemoryPermission other_permissions); /** * Unmaps a shared memory block from the specified address in system memory + * @param target_process Process from which to umap the memory block. * @param address Address in system memory where the shared memory block is mapped * @return Result code of the unmap operation */ - ResultCode Unmap(VAddr address); + ResultCode Unmap(Process* target_process, VAddr address); /** * Gets a pointer to the shared memory block @@ -66,10 +72,16 @@ public: */ u8* GetPointer(u32 offset = 0); - /// Address of shared memory block in the process. + /// Process that created this shared memory block. + SharedPtr owner_process; + /// Address of shared memory block in the owner process if specified. VAddr base_address; - /// Fixed address to allow mapping to. Used for blocks created from the linear heap. - VAddr fixed_address; + /// Physical address of the shared memory block in the linear heap if no address was specified during creation. + PAddr linear_heap_phys_address; + /// Backing memory for this shared memory block. + std::shared_ptr> backing_block; + /// Offset into the backing block for this shared memory. + u32 backing_block_offset; /// Size of the memory block. Page-aligned. u32 size; /// Permission restrictions applied to the process which created the block. diff --git a/src/core/hle/service/apt/apt.cpp b/src/core/hle/service/apt/apt.cpp index 6d72e8188..e7b8f5305 100644 --- a/src/core/hle/service/apt/apt.cpp +++ b/src/core/hle/service/apt/apt.cpp @@ -37,8 +37,6 @@ static Kernel::SharedPtr lock; static Kernel::SharedPtr notification_event; ///< APT notification event static Kernel::SharedPtr parameter_event; ///< APT parameter event -static std::shared_ptr> shared_font; - static u32 cpu_percent; ///< CPU time available to the running application /// Parameter data to be returned in the next call to Glance/ReceiveParameter @@ -74,23 +72,14 @@ void Initialize(Service::Interface* self) { void GetSharedFont(Service::Interface* self) { u32* cmd_buff = Kernel::GetCommandBuffer(); - if (shared_font != nullptr) { - // TODO(yuriks): This is a hack to keep this working right now even with our completely - // broken shared memory system. - shared_font_mem->fixed_address = SHARED_FONT_VADDR; - Kernel::g_current_process->vm_manager.MapMemoryBlock(shared_font_mem->fixed_address, - shared_font, 0, shared_font_mem->size, Kernel::MemoryState::Shared); - - cmd_buff[0] = IPC::MakeHeader(0x44, 2, 2); - cmd_buff[1] = RESULT_SUCCESS.raw; // No error - cmd_buff[2] = SHARED_FONT_VADDR; - cmd_buff[3] = IPC::MoveHandleDesc(); - cmd_buff[4] = Kernel::g_handle_table.Create(shared_font_mem).MoveFrom(); - } else { - cmd_buff[0] = IPC::MakeHeader(0x44, 1, 0); - cmd_buff[1] = -1; // Generic error (not really possible to verify this on hardware) - LOG_ERROR(Kernel_SVC, "called, but %s has not been loaded!", SHARED_FONT); - } + cmd_buff[0] = IPC::MakeHeader(0x44, 2, 2); + cmd_buff[1] = RESULT_SUCCESS.raw; // No error + // Since the SharedMemory interface doesn't provide the address at which the memory was allocated, + // the APT service calculates this address by scanning the entire address space (using svcQueryMemory) + // and searches for an allocation of the same size as the Shared Font. + cmd_buff[2] = Memory::PhysicalToVirtualAddress(shared_font_mem->linear_heap_phys_address); + cmd_buff[3] = IPC::MoveHandleDesc(); + cmd_buff[4] = Kernel::g_handle_table.Create(shared_font_mem).MoveFrom(); } void NotifyToWait(Service::Interface* self) { @@ -433,14 +422,12 @@ void Init() { FileUtil::IOFile file(filepath, "rb"); if (file.IsOpen()) { - // Read shared font data - shared_font = std::make_shared>((size_t)file.GetSize()); - file.ReadBytes(shared_font->data(), shared_font->size()); - // Create shared font memory object using Kernel::MemoryPermission; - shared_font_mem = Kernel::SharedMemory::Create(3 * 1024 * 1024, // 3MB - MemoryPermission::ReadWrite, MemoryPermission::Read, "APT_U:shared_font_mem"); + shared_font_mem = Kernel::SharedMemory::Create(nullptr, 0x332000, // 3272 KB + MemoryPermission::ReadWrite, MemoryPermission::Read, 0, Kernel::MemoryRegion::SYSTEM, "APT:SharedFont"); + // Read shared font data + file.ReadBytes(shared_font_mem->GetPointer(), file.GetSize()); } else { LOG_WARNING(Service_APT, "Unable to load shared font: %s", filepath.c_str()); shared_font_mem = nullptr; @@ -459,7 +446,6 @@ void Init() { } void Shutdown() { - shared_font = nullptr; shared_font_mem = nullptr; lock = nullptr; notification_event = nullptr; diff --git a/src/core/hle/service/csnd_snd.cpp b/src/core/hle/service/csnd_snd.cpp index 6318bf2a7..d2bb8941c 100644 --- a/src/core/hle/service/csnd_snd.cpp +++ b/src/core/hle/service/csnd_snd.cpp @@ -3,6 +3,7 @@ // Refer to the license.txt file included. #include +#include "common/alignment.h" #include "core/hle/hle.h" #include "core/hle/kernel/mutex.h" #include "core/hle/kernel/shared_memory.h" @@ -41,14 +42,16 @@ static Kernel::SharedPtr mutex = nullptr; void Initialize(Service::Interface* self) { u32* cmd_buff = Kernel::GetCommandBuffer(); - shared_memory = Kernel::SharedMemory::Create(cmd_buff[1], - Kernel::MemoryPermission::ReadWrite, - Kernel::MemoryPermission::ReadWrite, "CSNDSharedMem"); + u32 size = Common::AlignUp(cmd_buff[1], Memory::PAGE_SIZE); + using Kernel::MemoryPermission; + shared_memory = Kernel::SharedMemory::Create(nullptr, size, + MemoryPermission::ReadWrite, MemoryPermission::ReadWrite, + 0, Kernel::MemoryRegion::BASE, "CSND:SharedMemory"); mutex = Kernel::Mutex::Create(false); - cmd_buff[1] = 0; - cmd_buff[2] = 0x4000000; + cmd_buff[1] = RESULT_SUCCESS.raw; + cmd_buff[2] = IPC::MoveHandleDesc(2); cmd_buff[3] = Kernel::g_handle_table.Create(mutex).MoveFrom(); cmd_buff[4] = Kernel::g_handle_table.Create(shared_memory).MoveFrom(); } diff --git a/src/core/hle/service/gsp_gpu.cpp b/src/core/hle/service/gsp_gpu.cpp index b4c146e08..8ded9b09b 100644 --- a/src/core/hle/service/gsp_gpu.cpp +++ b/src/core/hle/service/gsp_gpu.cpp @@ -335,8 +335,9 @@ static void RegisterInterruptRelayQueue(Service::Interface* self) { g_interrupt_event->name = "GSP_GPU::interrupt_event"; using Kernel::MemoryPermission; - g_shared_memory = Kernel::SharedMemory::Create(0x1000, MemoryPermission::ReadWrite, - MemoryPermission::ReadWrite, "GSPSharedMem"); + g_shared_memory = Kernel::SharedMemory::Create(nullptr, 0x1000, + MemoryPermission::ReadWrite, MemoryPermission::ReadWrite, + 0, Kernel::MemoryRegion::BASE, "GSP:SharedMemory"); Handle shmem_handle = Kernel::g_handle_table.Create(g_shared_memory).MoveFrom(); diff --git a/src/core/hle/service/hid/hid.cpp b/src/core/hle/service/hid/hid.cpp index 1053d0f40..d216cecb4 100644 --- a/src/core/hle/service/hid/hid.cpp +++ b/src/core/hle/service/hid/hid.cpp @@ -280,8 +280,9 @@ void Init() { AddService(new HID_SPVR_Interface); using Kernel::MemoryPermission; - shared_mem = SharedMemory::Create(0x1000, MemoryPermission::ReadWrite, - MemoryPermission::Read, "HID:SharedMem"); + shared_mem = SharedMemory::Create(nullptr, 0x1000, + MemoryPermission::ReadWrite, MemoryPermission::Read, + 0, Kernel::MemoryRegion::BASE, "HID:SharedMemory"); next_pad_index = 0; next_touch_index = 0; diff --git a/src/core/hle/service/ir/ir.cpp b/src/core/hle/service/ir/ir.cpp index 505c441c6..079a87e48 100644 --- a/src/core/hle/service/ir/ir.cpp +++ b/src/core/hle/service/ir/ir.cpp @@ -94,8 +94,9 @@ void Init() { AddService(new IR_User_Interface); using Kernel::MemoryPermission; - shared_memory = SharedMemory::Create(0x1000, Kernel::MemoryPermission::ReadWrite, - Kernel::MemoryPermission::ReadWrite, "IR:SharedMemory"); + shared_memory = SharedMemory::Create(nullptr, 0x1000, + Kernel::MemoryPermission::ReadWrite, Kernel::MemoryPermission::ReadWrite, + 0, Kernel::MemoryRegion::BASE, "IR:SharedMemory"); transfer_shared_memory = nullptr; // Create event handle(s) diff --git a/src/core/hle/svc.cpp b/src/core/hle/svc.cpp index 60c8747f3..701dffef3 100644 --- a/src/core/hle/svc.cpp +++ b/src/core/hle/svc.cpp @@ -160,8 +160,6 @@ static ResultCode MapMemoryBlock(Handle handle, u32 addr, u32 permissions, u32 o LOG_TRACE(Kernel_SVC, "called memblock=0x%08X, addr=0x%08X, mypermissions=0x%08X, otherpermission=%d", handle, addr, permissions, other_permissions); - // TODO(Subv): The same process that created a SharedMemory object can not map it in its own address space - SharedPtr shared_memory = Kernel::g_handle_table.Get(handle); if (shared_memory == nullptr) return ERR_INVALID_HANDLE; @@ -176,7 +174,7 @@ static ResultCode MapMemoryBlock(Handle handle, u32 addr, u32 permissions, u32 o case MemoryPermission::WriteExecute: case MemoryPermission::ReadWriteExecute: case MemoryPermission::DontCare: - return shared_memory->Map(addr, permissions_type, + return shared_memory->Map(Kernel::g_current_process.get(), addr, permissions_type, static_cast(other_permissions)); default: LOG_ERROR(Kernel_SVC, "unknown permissions=0x%08X", permissions); @@ -196,7 +194,7 @@ static ResultCode UnmapMemoryBlock(Handle handle, u32 addr) { if (shared_memory == nullptr) return ERR_INVALID_HANDLE; - return shared_memory->Unmap(addr); + return shared_memory->Unmap(Kernel::g_current_process.get(), addr); } /// Connect to an OS service given the port name, returns the handle to the port to out @@ -790,18 +788,43 @@ static ResultCode CreateMemoryBlock(Handle* out_handle, u32 addr, u32 size, u32 if (size % Memory::PAGE_SIZE != 0) return ResultCode(ErrorDescription::MisalignedSize, ErrorModule::OS, ErrorSummary::InvalidArgument, ErrorLevel::Usage); - // TODO(Subv): Return E0A01BF5 if the address is not in the application's heap - - // TODO(Subv): Implement this function properly + SharedPtr shared_memory = nullptr; using Kernel::MemoryPermission; - SharedPtr shared_memory = SharedMemory::Create(size, - (MemoryPermission)my_permission, (MemoryPermission)other_permission); - // Map the SharedMemory to the specified address - shared_memory->base_address = addr; + auto VerifyPermissions = [](MemoryPermission permission) { + // SharedMemory blocks can not be created with Execute permissions + switch (permission) { + case MemoryPermission::None: + case MemoryPermission::Read: + case MemoryPermission::Write: + case MemoryPermission::ReadWrite: + return true; + default: + return false; + } + }; + + if (!VerifyPermissions(static_cast(my_permission)) || + !VerifyPermissions(static_cast(other_permission))) + return ResultCode(ErrorDescription::InvalidCombination, ErrorModule::OS, + ErrorSummary::InvalidArgument, ErrorLevel::Usage); + + if (addr < Memory::PROCESS_IMAGE_VADDR || addr + size > Memory::SHARED_MEMORY_VADDR_END) { + return ResultCode(ErrorDescription::InvalidAddress, ErrorModule::OS, ErrorSummary::InvalidArgument, ErrorLevel::Usage); + } + + // When trying to create a memory block with address = 0, + // if the process has the Shared Device Memory flag in the exheader, + // then we have to allocate from the same region as the caller process instead of the BASE region. + Kernel::MemoryRegion region = Kernel::MemoryRegion::BASE; + if (addr == 0 && Kernel::g_current_process->flags.shared_device_mem) + region = Kernel::g_current_process->flags.memory_region; + + shared_memory = SharedMemory::Create(Kernel::g_current_process, size, + static_cast(my_permission), static_cast(other_permission), addr, region); CASCADE_RESULT(*out_handle, Kernel::g_handle_table.Create(std::move(shared_memory))); - LOG_WARNING(Kernel_SVC, "(STUBBED) called addr=0x%08X", addr); + LOG_WARNING(Kernel_SVC, "called addr=0x%08X", addr); return RESULT_SUCCESS; }