TQ210 —— s5pv210u-boot.lds分析

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/* * (C) Copyright 2002 * Gary Jennejohn, DENX Software Engineering, <gj@denx.de> * * 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 */// u-boot.lds决定了u-boot可执行映像的连接方式，以及各个段的装载地址（装载域）和执行地址（运行域）。// 这个文件指定了各个文件链接后的先后排序。OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")/*OUTPUT_FORMAT("elf32-arm", "elf32-arm", "elf32-arm")*/OUTPUT_ARCH(arm)ENTRY(_start)SECTIONS{   /*    指定可执行image文件的全局入口点，通常这个地址都放在ROM(flash)0x0位置。   必须使编译器知道这个地址，通常都是修改此处来完成   */. = 0x00000000; /* .表示当前，当前地址是0，但这不是_start地址，会被TETX_BASE替代 */    /*     代码段基地址，board\samsung\TQ210\config.mk中定义，TEXT_BASE=0x23e00000 无论这里是什么都会被TEXT_BASE替代，所以这里的这个地址是不起作用的*/. = ALIGN(4); /* 4字节对齐 */.text      :  @ 指定代码段{   @ 执行顺序，start.S先运行cpu/s5pv210/start.o(.text)   cpu/s5pv210/s5pv210/cpu_init.o(.text)board/samsung/TQ210/lowlevel_init.o(.text)/*cpu/s5pc11x/onenand_cp.o(.text)*/cpu/s5pv210/nand_cp.o(.text)cpu/s5pv210/movi.o(.text)/*common/secure_boot.o(.text)*/common/ace_sha1.o(.text)cpu/s5pv210/pmic.o(.text)*(.text)  @ 其它代码部分}. = ALIGN(4);.rodata : { *(.rodata) }  @ 指定只读数据段. = ALIGN(4);.data : { *(.data) }   @ 指定读写数据段. = ALIGN(4);.got : { *(.got) }   @ 指定got段,got段式是uboot自定义的一个段,非标准段__u_boot_cmd_start = .;   @ u_boot命令段起始.u_boot_cmd : { *(.u_boot_cmd) }__u_boot_cmd_end = .;     @ u_boot命令段结束. = ALIGN(4);.mmudata : { *(.mmudata) } @ mmu数据. = ALIGN(4);__bss_start = .; @ bss段起始.bss : { *(.bss) }_end = .;        @ bss段结束}
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