x86_64: implement functions to jump to userspace

2026-02-08 11:58:27 +00:00
parent da611ab070
commit 880930e917
3 changed files with 71 additions and 7 deletions
--- a/arch/x86_64/thread_switch.S
+++ b/arch/x86_64/thread_switch.S
@@ -2,12 +2,12 @@

 .extern THREAD_sp

-.global switch_to
-.type switch_to, @function
+.global ml_thread_switch
+.type ml_thread_switch, @function

 	// %rdi = (struct thread *) current thread.
 	// %rsi = (struct thread *) next thread.
-switch_to:
+ml_thread_switch:
 	pushfq

 	push %rax
@@ -50,3 +50,27 @@ switch_to:
 	popfq

 	ret
+
+
+.global ml_thread_switch_user
+.type ml_thread_switch_user, @function
+ml_thread_switch_user:
+	pop %r15
+	pop %r14
+	pop %r13
+	pop %r12
+	pop %r11
+	pop %r10
+	pop %r9
+	pop %r8
+	pop %rdi
+	pop %rsi
+	pop %rbp
+	add $8, %rsp
+	pop %rbx
+	pop %rdx
+	pop %rcx
+	pop %rax
+
+	add $16, %rsp
+	iretq