move context_switch function and environment into different directory

1 files changed, 9 insertions, 0 deletions

diff --git a/arch/x86_64/src/kernel/cpu/segment_register.cpp b/arch/x86_64/src/kernel/cpu/segment_register.cpp
index d7857dd..9fb7433 100644
--- a/arch/x86_64/src/kernel/cpu/segment_register.cpp
+++ b/arch/x86_64/src/kernel/cpu/segment_register.cpp
@@ -30,4 +30,13 @@ namespace teachos::arch::kernel::cpu
                  : [input] "m"(segment_selector));
   }
 
+  auto read_code_segment_register() -> context_switching::interrupt_descriptor_table::segment_selector
+  {
+    context_switching::interrupt_descriptor_table::segment_selector current_value;
+    asm volatile("mov %%cs, %[output]" : [output] "=r"(current_value));
+    return current_value;
+  }
+
+  auto validate_segment_registers() -> context_switching::interrupt_descriptor_table::segment_selector {}
+
 }  // namespace teachos::arch::kernel::cpu