commit 67884002f48ecf9e39f9402bc3866c8674ada563
author Simon Glass <sjg@chromium.org> Sat Jul 15 21:38:43 2023 -0600
committer Bin Meng <bmeng@tinylab.org> Mon Jul 17 17:08:44 2023 +0800
tree bd1d4d112a1e9a56fa67387a3a16ab1971d4167a
parent 633af11dd65cde0c198f8548585d6610cf4d0655

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>

arch/x86/lib/bootm.c

diff --git a/arch/x86/lib/bootm.c b/arch/x86/lib/bootm.c
index 61cb7bc..3196f9d 100644
--- a/arch/x86/lib/bootm.c
+++ b/arch/x86/lib/bootm.c
@@ -258,7 +258,7 @@
 	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