From 9af5588c30c4126a2800aae1afcb0de2c373dc6c Mon Sep 17 00:00:00 2001
From: Benji Dial <benji@benjidial.net>
Date: Mon, 20 May 2024 17:40:47 -0400
Subject: rewrite application stuff in the kernel to support multitasking

---
 kernel/source/application.asm | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

(limited to 'kernel/source/application.asm')

diff --git a/kernel/source/application.asm b/kernel/source/application.asm
index ed8b190..632822f 100644
--- a/kernel/source/application.asm
+++ b/kernel/source/application.asm
@@ -137,9 +137,12 @@ resume_thread:
 
 extern copy_syscall_stack
 ;rdi = bottom
+;returns: pointer to copy
 
-global save_thread_state
-save_thread_state:
+extern resume_next_thread
+
+global yield
+yield:
 ;rdi = pointer to cpu state structure
 
   ;only saving registers that need to be preserved by this function
@@ -163,9 +166,7 @@ save_thread_state:
   mov qword [rdi + 152], rax ;kernel_stack_copy
   mov byte [rdi + 160], 0x01 ;in_syscall
 
-  xor al, al
-  ret
+  jmp resume_next_thread
 
 .resume_to:
-  mov al, 0x01
   ret
-- 
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