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// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <cstring>
#include "common/logging/log.h"
#include "core/memory.h"
#include "core/hle/kernel/shared_memory.h"
namespace Kernel {
SharedMemory::SharedMemory() {}
SharedMemory::~SharedMemory() {}
SharedPtr<SharedMemory> SharedMemory::Create(u32 size, MemoryPermission permissions,
MemoryPermission other_permissions, std::string name) {
SharedPtr<SharedMemory> shared_memory(new SharedMemory);
shared_memory->name = std::move(name);
shared_memory->base_address = 0x0;
shared_memory->size = size;
shared_memory->permissions = permissions;
shared_memory->other_permissions = other_permissions;
return shared_memory;
}
ResultCode SharedMemory::Map(VAddr address, MemoryPermission permissions,
MemoryPermission other_permissions) {
if (address < Memory::SHARED_MEMORY_VADDR || address + size >= Memory::SHARED_MEMORY_VADDR_END) {
LOG_ERROR(Kernel, "cannot map id=%u, address=0x%08X outside of shared mem bounds!",
GetObjectId(), address);
// TODO: Verify error code with hardware
return ResultCode(ErrorDescription::InvalidAddress, ErrorModule::Kernel,
ErrorSummary::InvalidArgument, ErrorLevel::Permanent);
}
// TODO: Test permissions
// 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);
}
this->base_address = address;
return RESULT_SUCCESS;
}
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;
}
} // namespace
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