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author | Feng Chen <VonChenPlus@gmail.com> | 2021-12-18 06:57:14 +0100 |
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committer | GitHub <noreply@github.com> | 2021-12-18 06:57:14 +0100 |
commit | e49184e6069a9d791d2df3c1958f5c4b1187e124 (patch) | |
tree | b776caf722e0be0e680f67b0ad0842628162ef1c /src/core/hle/kernel/k_page_table.cpp | |
parent | Implement convert legacy to generic (diff) | |
parent | Merge pull request #7570 from ameerj/favorites-expanded (diff) | |
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Diffstat (limited to '')
-rw-r--r-- | src/core/hle/kernel/k_page_table.cpp | 123 |
1 files changed, 121 insertions, 2 deletions
diff --git a/src/core/hle/kernel/k_page_table.cpp b/src/core/hle/kernel/k_page_table.cpp index 526b87241..99982e5a3 100644 --- a/src/core/hle/kernel/k_page_table.cpp +++ b/src/core/hle/kernel/k_page_table.cpp @@ -368,6 +368,33 @@ ResultCode KPageTable::UnmapProcessCodeMemory(VAddr dst_addr, VAddr src_addr, st return ResultSuccess; } +ResultCode KPageTable::UnmapProcessMemory(VAddr dst_addr, std::size_t size, + KPageTable& src_page_table, VAddr src_addr) { + std::lock_guard lock{page_table_lock}; + + const std::size_t num_pages{size / PageSize}; + + // Check that the memory is mapped in the destination process. + size_t num_allocator_blocks; + R_TRY(CheckMemoryState(&num_allocator_blocks, dst_addr, size, KMemoryState::All, + KMemoryState::SharedCode, KMemoryPermission::UserReadWrite, + KMemoryPermission::UserReadWrite, KMemoryAttribute::All, + KMemoryAttribute::None)); + + // Check that the memory is mapped in the source process. + R_TRY(src_page_table.CheckMemoryState(src_addr, size, KMemoryState::FlagCanMapProcess, + KMemoryState::FlagCanMapProcess, KMemoryPermission::None, + KMemoryPermission::None, KMemoryAttribute::All, + KMemoryAttribute::None)); + + CASCADE_CODE(Operate(dst_addr, num_pages, KMemoryPermission::None, OperationType::Unmap)); + + // Apply the memory block update. + block_manager->Update(dst_addr, num_pages, KMemoryState::Free, KMemoryPermission::None, + KMemoryAttribute::None); + + return ResultSuccess; +} void KPageTable::MapPhysicalMemory(KPageLinkedList& page_linked_list, VAddr start, VAddr end) { auto node{page_linked_list.Nodes().begin()}; PAddr map_addr{node->GetAddress()}; @@ -685,8 +712,8 @@ ResultCode KPageTable::UnmapPages(VAddr addr, KPageLinkedList& page_linked_list, return ResultSuccess; } -ResultCode KPageTable::SetCodeMemoryPermission(VAddr addr, std::size_t size, - KMemoryPermission perm) { +ResultCode KPageTable::SetProcessMemoryPermission(VAddr addr, std::size_t size, + KMemoryPermission perm) { std::lock_guard lock{page_table_lock}; @@ -942,6 +969,60 @@ ResultCode KPageTable::UnlockForDeviceAddressSpace(VAddr addr, std::size_t size) return ResultSuccess; } +ResultCode KPageTable::LockForCodeMemory(VAddr addr, std::size_t size) { + std::lock_guard lock{page_table_lock}; + + KMemoryPermission new_perm = KMemoryPermission::NotMapped | KMemoryPermission::KernelReadWrite; + + KMemoryPermission old_perm{}; + + if (const ResultCode result{CheckMemoryState( + nullptr, &old_perm, nullptr, addr, size, KMemoryState::FlagCanCodeMemory, + KMemoryState::FlagCanCodeMemory, KMemoryPermission::Mask, + KMemoryPermission::UserReadWrite, KMemoryAttribute::All, KMemoryAttribute::None)}; + result.IsError()) { + return result; + } + + new_perm = (new_perm != KMemoryPermission::None) ? new_perm : old_perm; + + block_manager->UpdateLock( + addr, size / PageSize, + [](KMemoryBlockManager::iterator block, KMemoryPermission permission) { + block->ShareToDevice(permission); + }, + new_perm); + + return ResultSuccess; +} + +ResultCode KPageTable::UnlockForCodeMemory(VAddr addr, std::size_t size) { + std::lock_guard lock{page_table_lock}; + + KMemoryPermission new_perm = KMemoryPermission::UserReadWrite; + + KMemoryPermission old_perm{}; + + if (const ResultCode result{CheckMemoryState( + nullptr, &old_perm, nullptr, addr, size, KMemoryState::FlagCanCodeMemory, + KMemoryState::FlagCanCodeMemory, KMemoryPermission::None, KMemoryPermission::None, + KMemoryAttribute::All, KMemoryAttribute::Locked)}; + result.IsError()) { + return result; + } + + new_perm = (new_perm != KMemoryPermission::None) ? new_perm : old_perm; + + block_manager->UpdateLock( + addr, size / PageSize, + [](KMemoryBlockManager::iterator block, KMemoryPermission permission) { + block->UnshareToDevice(permission); + }, + new_perm); + + return ResultSuccess; +} + ResultCode KPageTable::InitializeMemoryLayout(VAddr start, VAddr end) { block_manager = std::make_unique<KMemoryBlockManager>(start, end); @@ -1231,4 +1312,42 @@ ResultCode KPageTable::CheckMemoryState(KMemoryState* out_state, KMemoryPermissi return ResultSuccess; } +ResultCode KPageTable::CheckMemoryState(size_t* out_blocks_needed, VAddr addr, size_t size, + KMemoryState state_mask, KMemoryState state, + KMemoryPermission perm_mask, KMemoryPermission perm, + KMemoryAttribute attr_mask, KMemoryAttribute attr) const { + // Get information about the first block. + const VAddr last_addr = addr + size - 1; + KMemoryBlockManager::const_iterator it{block_manager->FindIterator(addr)}; + KMemoryInfo info = it->GetMemoryInfo(); + + // If the start address isn't aligned, we need a block. + const size_t blocks_for_start_align = + (Common::AlignDown(addr, PageSize) != info.GetAddress()) ? 1 : 0; + + while (true) { + // Validate against the provided masks. + R_TRY(CheckMemoryState(info, state_mask, state, perm_mask, perm, attr_mask, attr)); + + // Break once we're done. + if (last_addr <= info.GetLastAddress()) { + break; + } + + // Advance our iterator. + it++; + info = it->GetMemoryInfo(); + } + + // If the end address isn't aligned, we need a block. + const size_t blocks_for_end_align = + (Common::AlignUp(addr + size, PageSize) != info.GetEndAddress()) ? 1 : 0; + + if (out_blocks_needed != nullptr) { + *out_blocks_needed = blocks_for_start_align + blocks_for_end_align; + } + + return ResultSuccess; +} + } // namespace Kernel |