arch/x64:Fix the issue where RFLAGS is not restored after a syscall return

When a syscall is invoked, the RFLAGS register is saved into R11. It must be restored before returning Signed-off-by: liwenxiang1 <liwenxiang1@xiaomi.com>
2026-05-23 06:39:01 +08:00 · 2025-05-28 10:53:02 +08:00
parent 794c325947
commit addc6b165a
1 changed files with 4 additions and 0 deletions
@@ -696,6 +696,10 @@ no_kstack_switch:

 syscall_no_ring3:
 #  endif
+	/* Restore the value of RFLAGS from R11 */
+	pushq   %r11
+	popfq
+
 	/* Return to address pointed in RCX - must be on stack */
 	pushq   %rcx
 	ret