diff options
Diffstat (limited to 'arch/x86_64/src/kernel/cpu/gdtr.cpp')
| -rw-r--r-- | arch/x86_64/src/kernel/cpu/gdtr.cpp | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/x86_64/src/kernel/cpu/gdtr.cpp b/arch/x86_64/src/kernel/cpu/gdtr.cpp new file mode 100644 index 0000000..74a4e1c --- /dev/null +++ b/arch/x86_64/src/kernel/cpu/gdtr.cpp @@ -0,0 +1,19 @@ +#include "arch/kernel/cpu/gdtr.hpp" + +#include "arch/context_switching/segment_descriptor_table/global_descriptor_table_pointer.hpp" + +namespace teachos::arch::kernel::cpu +{ + auto store_global_descriptor_table() -> context_switching::segment_descriptor_table::global_descriptor_table_pointer + { + context_switching::segment_descriptor_table::global_descriptor_table_pointer current_value{}; + asm("sgdt %[output]" : [output] "=m"(current_value)); + return current_value; + } + + auto load_global_descriptor_table( + context_switching::segment_descriptor_table::global_descriptor_table_pointer const & gdt_pointer) -> void + { + asm volatile("lgdt %[input]" : /* no output from call */ : [input] "m"(gdt_pointer)); + } +} // namespace teachos::arch::kernel::cpu |