diff options
Diffstat (limited to 'kernel/l0/context_switch.s')
| -rw-r--r-- | kernel/l0/context_switch.s | 58 |
1 files changed, 0 insertions, 58 deletions
diff --git a/kernel/l0/context_switch.s b/kernel/l0/context_switch.s deleted file mode 100644 index 6738a03..0000000 --- a/kernel/l0/context_switch.s +++ /dev/null @@ -1,58 +0,0 @@ -[EXTERN kernel_stack_top] -[EXTERN run_scheduler] - -[GLOBAL save_context_and_enter_scheduler] -; void save_context_and_enter_scheduler(struct saved_context *ctx); -save_context_and_enter_scheduler: - pushf - cli - pusha ; Pushes edi,esi,ebp,esp,ebx,edx,ecx,eax - - mov eax, cr3 - push eax - - mov eax, [esp+44] ; get address of saved_context structure - mov [eax], esp ; save esp - mov dword [eax+4], resume_saved_context ; save eip - - mov esp, kernel_stack_top - jmp run_scheduler - -resume_saved_context: - pop eax - mov cr3, eax - - popa - popf - ret - -[GLOBAL irq0_save_context_and_enter_scheduler] -; meant to be called on IRQ0 -; general registers already saved by IRQ handler stub -; flags already saved by interruption and interruptions disabled -; only saves CR3 -irq0_save_context_and_enter_scheduler: - mov eax, cr3 - push eax - - mov eax, [esp+8] ; get address of saved_context structure - mov [eax], esp ; save esp - mov dword [eax+4], resume_saved_irq0_context ; save eip - - mov esp, kernel_stack_top - jmp run_scheduler - -resume_saved_irq0_context: - pop eax - mov cr3, eax - ret - - -[GLOBAL resume_context] -resume_context: - mov eax, [esp+4] ; get address of saved context - mov esp, [eax] ; resume esp - mov ecx, [eax+4] ; jump to specified eip - jmp ecx - -; vim: set ts=4 sw=4 tw=0 noet : |