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链接器LD按照u-boot.lds链接脚本的规则，把所有.o文件链接在一起组成整体。
/*
* (C) Copyright 2002
* Gary Jennejohn, DENX Software Engineering,
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
/* 输出格式：32位ARM指令、小端模式、elf格式 */
OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
/*OUTPUT_FORMAT("elf32-arm", "elf32-arm", "elf32-arm")*/
/* 平台：ARM */
OUTPUT_ARCH(arm)
/* 程序入口：_start */
ENTRY(_start)
SECTIONS
{
/* “.”代表当前地址 */
. = 0x00000000;
/* 4字节对齐 */
. = ALIGN(4);
/* 代码段，存放程序中的代码 */
.text :
{
cpu/s5pc11x/start.o(.text)
cpu/s5pc11x/s5pc110/cpu_init.o(.text)
board/samsung/x210/lowlevel_init.o(.text)
cpu/s5pc11x/onenand_cp.o (.text)
cpu/s5pc11x/nand_cp.o (.text)
cpu/s5pc11x/movi.o (.text)
common/secure_boot.o (.text)
common/ace_sha1.o (.text)
cpu/s5pc11x/pmic.o (.text)
*(.text)
}
. = ALIGN(4);
/* 只读数据段 */
.rodata : { *(.rodata) }
. = ALIGN(4);
/* 数据段，存放程序中初始化的全局变量 */
.data : { *(.data) }
. = ALIGN(4);
.got : { *(.got) }
__u_boot_cmd_start = .;
.u_boot_cmd : { *(.u_boot_cmd) }
__u_boot_cmd_end = .;
. = ALIGN(4);
.mmudata : { *(.mmudata) }
. = ALIGN(4);
/* bss段，存放程序中未初始化的全局变量 */
__bss_start = .;
.bss : { *(.bss) }
_end = .;
}