Update rpi-os.md

fxlin · Feb 21, 2024 · 82f6c3a · 82f6c3a
1 parent 3b05c39
commit 82f6c3a
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/docs/exp5/rpi-os.md b/docs/exp5/rpi-os.md
@@ -364,9 +364,10 @@ New addition is made to the middle of the [ret_from_fork](https://github.com/fxl
 .globl ret_from_fork
 ret_from_fork:
     bl    schedule_tail
-    cbz   x19, ret_to_user            // not a kernel thread
+    cbz   x19, ret_to_user            // not a kernel thread, go to ret_to_user
     mov   x0, x20
     blr   x19
+    // kernel thread returns, and continues below
 ret_to_user:
     bl disable_irq
     kernel_exit 0