From 58d2af14429be02b580cde5b3e23978530d8ab74 Mon Sep 17 00:00:00 2001
From: Amlal El Mahrouss <amlal@nekernel.org>
Date: Wed, 21 May 2025 10:19:07 +0200
Subject: feat(kernel): Architectural changes, and introducing a kKernelVM.

see code for more details.

Signed-off-by: Amlal El Mahrouss <amlal@nekernel.org>
---
 dev/kernel/HALKit/AMD64/HalCommonAPI.asm | 48 ++++++++++++++++++++++++--------
 1 file changed, 36 insertions(+), 12 deletions(-)

(limited to 'dev/kernel/HALKit/AMD64/HalCommonAPI.asm')

diff --git a/dev/kernel/HALKit/AMD64/HalCommonAPI.asm b/dev/kernel/HALKit/AMD64/HalCommonAPI.asm
index 230f50ed..d0ce2418 100644
--- a/dev/kernel/HALKit/AMD64/HalCommonAPI.asm
+++ b/dev/kernel/HALKit/AMD64/HalCommonAPI.asm
@@ -56,6 +56,8 @@ extern hal_system_call_enter
 global mp_system_call_handler
 
 mp_system_call_handler:
+    push rbp
+    mov  rbp, rsp
 
     push r8
     push r9
@@ -77,7 +79,9 @@ mp_system_call_handler:
     pop r9
     pop r8
 
-    o64 sysret
+    pop rbp
+
+    o64 iret
 
 
 section .text
@@ -88,12 +92,40 @@ sched_jump_to_task:
     push rbp
     mov  rbp, rsp
 
-    mov ax, 0x20
+    mov ax, 0x30
     mov ds, ax
     mov es, ax
     mov fs, ax
     mov gs, ax
 
+    mov ax, 0x18
+    ltr ax
+
+    push 0x30
+    mov rdx, [rcx + 0x08]
+    push rdx
+    o64 pushf
+    push 0x28
+    mov rdx, [rcx + 0x00]
+    push rdx
+
+    call sched_recover_registers
+
+    o64 iret
+
+global sched_idle_task
+
+sched_idle_task:
+    mov ax, cs
+    and ax, 3
+
+    jmp $
+    ret
+
+sched_recover_registers:
+    push rbp
+    mov  rbp, rsp
+
     mov  r8, [rcx + 0x10]
     mov  r9, [rcx + 0x18]
     mov r10, [rcx + 0x20]
@@ -103,14 +135,6 @@ sched_jump_to_task:
     mov r14, [rcx + 0x40]
     mov r15, [rcx + 0x48]
 
-    mov rax, [rcx + 0x00]
-    mov rsp, [rcx + 0x08]
-
-    o64 sysret
-    int 3 ;; Never continue here.
+    pop rbp
 
-global sched_idle_task
-
-sched_idle_task:
-    jmp $
-    ret
+    ret
\ No newline at end of file
-- 
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