From: Simon Glass <sjg@chromium.org>
Date: Sun, 16 Jul 2023 03:38:43 +0000 (-0600)
Subject: x86: Correct get_sp() implementation for 64-bit
X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=67884002f48ecf9e39f9402bc3866c8674ada563;p=u-boot.git

x86: Correct get_sp() implementation for 64-bit

Use an assembler implementation as is done for i386, so that the results
are equivalent for i386 and x86_64.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
---

diff --git a/arch/x86/lib/bootm.c b/arch/x86/lib/bootm.c
index 61cb7bc611..3196f9ddc2 100644
--- a/arch/x86/lib/bootm.c
+++ b/arch/x86/lib/bootm.c
@@ -258,7 +258,7 @@ static ulong get_sp(void)
 	ulong ret;
 
 #if CONFIG_IS_ENABLED(X86_64)
-	ret = gd->start_addr_sp;
+	asm("mov %%rsp, %0" : "=r"(ret) : );
 #else
 	asm("mov %%esp, %0" : "=r"(ret) : );
 #endif