diff options
Diffstat (limited to 'arch/x86_64/src/memory/paging')
| -rw-r--r-- | arch/x86_64/src/memory/paging/page_table.cpp | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/arch/x86_64/src/memory/paging/page_table.cpp b/arch/x86_64/src/memory/paging/page_table.cpp index 555d38a..b229ff7 100644 --- a/arch/x86_64/src/memory/paging/page_table.cpp +++ b/arch/x86_64/src/memory/paging/page_table.cpp @@ -99,25 +99,30 @@ namespace teachos::arch::memory::paging auto page_table_handle::zero_entries() -> void { handle->zero_entries(); } - auto page_table_handle::next_table(std::size_t table_index) const -> std::optional<page_table_handle> + auto page_table_handle::next_table(std::size_t table_index) -> std::optional<page_table_handle> { exception_handling::assert(handle_level != page_table_handle::LEVEL1, "[Page Table] Attempted to call next_table on level 1 page table"); auto next_table = handle->next_table(table_index); if (next_table) { - return page_table_handle{next_table.value(), handle_level--}; + handle_level--; + return page_table_handle{next_table.value(), handle_level}; } return std::nullopt; } auto page_table_handle::operator[](std::size_t index) const -> entry { return handle->operator[](index); } - auto operator--(page_table_handle::level value, int) -> page_table_handle::level + auto operator--(page_table_handle::level & value, int) -> page_table_handle::level { exception_handling::assert(value != page_table_handle::LEVEL1, "[Page table] Attempted to decrement enum to value outside of range"); + + page_table_handle::level original_value = value; auto new_value = static_cast<std::underlying_type<page_table_handle::level>::type>(value); - return static_cast<page_table_handle::level>(--new_value); + value = static_cast<page_table_handle::level>(--new_value); + + return original_value; } } // namespace teachos::arch::memory::paging |