git: 347cec10e25e - main - amd64: align stack on 16 bytes when calling into a EFIRT method

From: Konstantin Belousov <kib_at_FreeBSD.org>
Date: Thu, 05 Mar 2026 23:44:54 UTC 
The branch main has been updated by kib:

URL: https://cgit.FreeBSD.org/src/commit/?id=347cec10e25eacb2906a0a8105eff036850db766

commit 347cec10e25eacb2906a0a8105eff036850db766
Author:     Konstantin Belousov <kib@FreeBSD.org>
AuthorDate: 2026-03-05 08:37:23 +0000
Commit:     Konstantin Belousov <kib@FreeBSD.org>
CommitDate: 2026-03-05 23:43:55 +0000

    amd64: align stack on 16 bytes when calling into a EFIRT method
    
    Reported by:    Abdelkader Boudih
    Sponsored by:   The FreeBSD Foundation
    MFC after:      1 week
---
 sys/amd64/amd64/efirt_support.S | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sys/amd64/amd64/efirt_support.S b/sys/amd64/amd64/efirt_support.S
index 98063ad561aa..54578f573750 100644
--- a/sys/amd64/amd64/efirt_support.S
+++ b/sys/amd64/amd64/efirt_support.S
@@ -58,6 +58,7 @@ ENTRY(efi_rt_arch_call)
 	cmovbl	%eax, %ecx
 	shll	$3, %ecx
 	subq	%rcx, %rsp
+	andq	$~0xf, %rsp
 
 	cmpl	$0, %ebx
 	jz	1f