Not upstreamed.
Fixes cross-build for the Hurd, from i686-linux,
see <https://bugs.gnu.org/41982>.

From 270667540146f8ef9ea7a44258a71b3837a7af4a Mon Sep 17 00:00:00 2001
From: "Jan (janneke) Nieuwenhuizen" <janneke@gnu.org>
Date: Sun, 21 Jun 2020 15:10:40 +0200
Subject: [PATCH] grub-core: Build fixes for i386

* grub-core/lib/i386/relocator64.S: Avoid x86_64 instructions on i386.
---
 grub-core/lib/i386/relocator64.S | 26 +++++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/grub-core/lib/i386/relocator64.S b/grub-core/lib/i386/relocator64.S
index 148f38adb..45fed9444 100644
--- a/grub-core/lib/i386/relocator64.S
+++ b/grub-core/lib/i386/relocator64.S
@@ -63,7 +63,9 @@ VARIABLE(grub_relocator64_cr3)
 	movq	%rax, %cr3
 #endif
 
+#ifdef __x86_64__
 	.code64
+#endif
 
 	/* mov imm64, %rax */
 	.byte 	0x48
@@ -71,7 +73,14 @@ VARIABLE(grub_relocator64_cr3)
 VARIABLE(grub_relocator64_rsp)
 	.quad	0
 
+#ifndef __x86_64__
+	/* movq	%rax, %rsp */
+	.byte 	0x48
+	.byte	0x89
+	.byte	0xc4
+#else
 	movq	%rax, %rsp
+#endif
 
 #ifdef GRUB_MACHINE_EFI
 	jmp	LOCAL(skip_efi_stack_align)
@@ -95,8 +104,15 @@ LOCAL(skip_efi_stack_align):
 VARIABLE(grub_relocator64_rsi)
 	.quad	0
 
+#ifndef	__x86_64__
+	/* movq	%rax, %rsi */
+	.byte 	0x48
+	.byte	0x89
+	.byte 	0xc6
+#else
 	movq	%rax, %rsi
-	
+#endif
+
 	/* mov imm64, %rax */
 	.byte 	0x48
 	.byte	0xb8
@@ -128,6 +144,14 @@ VARIABLE(grub_relocator64_rdx)
 #ifdef __APPLE__
 	.byte 0xff, 0x25
 	.quad 0
+#elif !defined (__x86_64__)
+	/* jmp *LOCAL(jump_addr) (%rip) */
+	.byte 0xff
+        .byte 0x25
+	.byte 0
+	.byte 0
+	.byte 0
+	.byte 0
 #else
 	jmp *LOCAL(jump_addr) (%rip)
 #endif
-- 
Jan Nieuwenhuizen <janneke@gnu.org> | GNU LilyPond http://lilypond.org
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