diff options
Diffstat (limited to 'arch/x86_64/include')
| -rw-r--r-- | arch/x86_64/include/arch/memory/paging/kernel_mapper.hpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86_64/include/arch/memory/paging/kernel_mapper.hpp b/arch/x86_64/include/arch/memory/paging/kernel_mapper.hpp index f980451..897ae06 100644 --- a/arch/x86_64/include/arch/memory/paging/kernel_mapper.hpp +++ b/arch/x86_64/include/arch/memory/paging/kernel_mapper.hpp @@ -48,6 +48,8 @@ namespace teachos::arch::memory::paging inactive_page_table new_table{frame.value(), active_table, temporary_page}; remap_elf_kernel_sections(new_table, temporary_page, active_table); auto const old_table = switch_active_page_table(new_table); + // Turn old level 4 page table, mapped by assembler code into stack guard page. + // Only works if the identity mapped page tables by assembler are right above the stack. auto const old_level_4_page = virtual_page::containing_address(old_table.page_table_level_4_frame.start_address()); active_table.unmap_page(allocator, old_level_4_page); |