From 1bd0cf542ff8db1cda572c4d92462643296af121 Mon Sep 17 00:00:00 2001 From: Subv Date: Sun, 17 Apr 2016 21:07:52 -0500 Subject: 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/kernel/shared_memory.cpp | 116 +++++++++++++++++----------------- 1 file changed, 59 insertions(+), 57 deletions(-) (limited to 'src/core/hle/kernel/shared_memory.cpp') 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); - } - - // 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; - } + // 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. - 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 -- cgit v1.2.3