Mirrors/yuzu
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Kernel/SharedMemory: Properly implemented shared memory support.

Browse source 
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.
This commit is contained in:
Subv 2016-04-17 21:07:52 -05:00
parent 42a50da76b
commit 1bd0cf542f
10 changed files with 147 additions and 118 deletions
Download patch file Download diff file Expand all files Collapse all files

47
src/core/hle/svc.cpp
View file

@ -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<SharedMemory> shared_memory = Kernel::g_handle_table.Get<SharedMemory>(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<MemoryPermission>(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<SharedMemory> shared_memory = nullptr;
using Kernel::MemoryPermission;
SharedPtr<SharedMemory> 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<MemoryPermission>(my_permission)) ||
!VerifyPermissions(static_cast<MemoryPermission>(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<MemoryPermission>(my_permission), static_cast<MemoryPermission>(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;
}