x86: Add a link script for 64-bit x86

This needs a different image format from 32-bit x86, so add a new link
script.

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

arch/x86/cpu/config.mk

@@ -15,3 +15,9 @@ LDPPFLAGS += -DRESET_SEG_SIZE=$(CONFIG_RESET_SEG_SIZE)
 LDPPFLAGS += -DRESET_VEC_LOC=$(CONFIG_RESET_VEC_LOC)
 LDPPFLAGS += -DSTART_16=$(CONFIG_SYS_X86_START16)
 LDPPFLAGS += -DRESET_BASE="CONFIG_SYS_TEXT_BASE + (CONFIG_SYS_MONITOR_LEN - RESET_SEG_SIZE)"
+
+ifdef CONFIG_X86_64
+ifndef CONFIG_SPL_BUILD
+LDSCRIPT = $(srctree)/arch/x86/cpu/u-boot-64.lds
+endif
+endif

arch/x86/cpu/u-boot-64.lds

@@ -0,0 +1,76 @@
+/*
+ * (C) Copyright 2002
+ * Daniel Engström, Omicron Ceti AB, daniel@omicron.se.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <config.h>
+OUTPUT_FORMAT("elf64-x86-64", "elf64-x86-64", "elf64-x86-64")
+OUTPUT_ARCH(i386:x86-64)
+ENTRY(_start)
+
+SECTIONS
+{
+#ifndef CONFIG_CMDLINE
+	/DISCARD/ : { *(.u_boot_list_2_cmd_*) }
+#endif
+
+	. = CONFIG_SYS_TEXT_BASE;	/* Location of bootcode in flash */
+	__text_start = .;
+	.text  : { *(.text*); }
+
+	. = ALIGN(4);
+
+	. = ALIGN(4);
+	.u_boot_list : {
+		KEEP(*(SORT(.u_boot_list*)));
+	}
+
+	. = ALIGN(4);
+	.rodata : { *(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*))) }
+
+	. = ALIGN(4);
+	.data : { *(.data*) }
+
+	. = ALIGN(4);
+	.hash : { *(.hash*) }
+
+	. = ALIGN(4);
+	.got : { *(.got*) }
+
+	. = ALIGN(4);
+	__data_end = .;
+	__init_end = .;
+
+	. = ALIGN(4);
+	.dynsym : { *(.dynsym*) }
+
+	. = ALIGN(4);
+	__rel_dyn_start = .;
+	.rela.dyn : {
+		*(.rela*)
+	}
+	__rel_dyn_end = .;
+	. = ALIGN(4);
+
+	.dynamic : { *(.dynamic) }
+
+	. = ALIGN(4);
+	_end = .;
+
+	.bss __rel_dyn_start (OVERLAY) : {
+		__bss_start = .;
+		*(.bss)
+		*(COM*)
+		. = ALIGN(4);
+		__bss_end = .;
+	}
+
+	/DISCARD/ : { *(.dynsym) }
+	/DISCARD/ : { *(.dynstr*) }
+	/DISCARD/ : { *(.dynamic*) }
+	/DISCARD/ : { *(.plt*) }
+	/DISCARD/ : { *(.interp*) }
+	/DISCARD/ : { *(.gnu*) }
+}