diff options
| -rw-r--r-- | src/core/hle/kernel/vm_manager.cpp | 20 | ||||
| -rw-r--r-- | src/core/hle/kernel/vm_manager.h | 8 |
2 files changed, 28 insertions, 0 deletions
diff --git a/src/core/hle/kernel/vm_manager.cpp b/src/core/hle/kernel/vm_manager.cpp index e1a34eef1..1a92c8f70 100644 --- a/src/core/hle/kernel/vm_manager.cpp +++ b/src/core/hle/kernel/vm_manager.cpp @@ -143,6 +143,26 @@ ResultVal<VMManager::VMAHandle> VMManager::MapBackingMemory(VAddr target, u8* me return MakeResult<VMAHandle>(MergeAdjacent(vma_handle)); } +ResultVal<VAddr> VMManager::FindFreeRegion(u64 size) const { + // Find the first Free VMA. + const VAddr base = GetASLRRegionBaseAddress(); + const VMAHandle vma_handle = std::find_if(vma_map.begin(), vma_map.end(), [&](const auto& vma) { + if (vma.second.type != VMAType::Free) + return false; + + const VAddr vma_end = vma.second.base + vma.second.size; + return vma_end > base && vma_end >= base + size; + }); + + if (vma_handle == vma_map.end()) { + // TODO(Subv): Find the correct error code here. + return ResultCode(-1); + } + + const VAddr target = std::max(base, vma_handle->second.base); + return MakeResult<VAddr>(target); +} + ResultVal<VMManager::VMAHandle> VMManager::MapMMIO(VAddr target, PAddr paddr, u64 size, MemoryState state, Memory::MemoryHookPointer mmio_handler) { diff --git a/src/core/hle/kernel/vm_manager.h b/src/core/hle/kernel/vm_manager.h index 84c890224..2447cbb8f 100644 --- a/src/core/hle/kernel/vm_manager.h +++ b/src/core/hle/kernel/vm_manager.h @@ -158,6 +158,14 @@ public: ResultVal<VMAHandle> MapBackingMemory(VAddr target, u8* memory, u64 size, MemoryState state); /** + * Finds the first free address that can hold a region of the desired size. + * + * @param size Size of the desired region. + * @return The found free address. + */ + ResultVal<VAddr> FindFreeRegion(u64 size) const; + + /** * Maps a memory-mapped IO region at a given address. * * @param target The guest address to start the mapping at. |