wip: feat(kernel): Add stub for ring-3 switch on the AP side of the

scheduling system.

why?

 - To let the code run in user mode, as specified in the design.

next:

 - Debug the #06 interrupt when switching to task.

Signed-off-by: Amlal El Mahrouss <amlal@nekernel.org>

2 files changed, 10 insertions, 7 deletions

diff --git a/dev/kernel/HALKit/AMD64/HalApplicationProcessor.cc b/dev/kernel/HALKit/AMD64/HalApplicationProcessor.cc
index 78db9b16..46ad8fd6 100644
--- a/dev/kernel/HALKit/AMD64/HalApplicationProcessor.cc
+++ b/dev/kernel/HALKit/AMD64/HalApplicationProcessor.cc
@@ -112,12 +112,10 @@ EXTERN_C BOOL mp_register_process(HAL::StackFramePtr stack_frame, ProcessID thrd
     kHWThread[thrdid].mFramePtr = stack_frame;
     kHWThread[thrdid].mThreadID = thrdid;
 
-    STATIC HardwareTimer timer{rtl_milliseconds(1000)};
-
-    timer.Wait();
-
     HardwareThreadScheduler::The()[thrdid].Leak()->Busy(NO);
 
+    sched_jump_to_task(stack_frame);
+
     return YES;
   }
 
diff --git a/dev/kernel/HALKit/AMD64/HalCommonAPI.asm b/dev/kernel/HALKit/AMD64/HalCommonAPI.asm
index a04aeb95..230f50ed 100644
--- a/dev/kernel/HALKit/AMD64/HalCommonAPI.asm
+++ b/dev/kernel/HALKit/AMD64/HalCommonAPI.asm
@@ -84,11 +84,16 @@ section .text
 
 global sched_jump_to_task
 
-;; Jump to the task from its stack frame.
 sched_jump_to_task:
     push rbp
     mov  rbp, rsp
 
+    mov ax, 0x20
+    mov ds, ax
+    mov es, ax
+    mov fs, ax
+    mov gs, ax
+
     mov  r8, [rcx + 0x10]
     mov  r9, [rcx + 0x18]
     mov r10, [rcx + 0x20]
@@ -101,11 +106,11 @@ sched_jump_to_task:
     mov rax, [rcx + 0x00]
     mov rsp, [rcx + 0x08]
 
-    jmp rax
+    o64 sysret
     int 3 ;; Never continue here.
 
 global sched_idle_task
 
 sched_idle_task:
     jmp $
-    ret
\ No newline at end of file
+    ret