调试dcc 试图将u-boot放入ocm运行碰到的问题

起因：

gd->mon_len = (ulong)&__bss_end - (ulong)_start;

在u-boot.map中查找，发现__bss_end并不是u-boot.bin的结束

根据u-boot-2018.07/arch/arm/mach-xxx/u-boot.lds

/*
 * Copyright (c) 2004-2008 Texas Instruments
 *
 * (C) Copyright 2002
 * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
 *
 * SPDX-License-Identifier:    GPL-2.0+
 */

OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
OUTPUT_ARCH(arm)
ENTRY(_start)
SECTIONS
{
    . = 0x00000000;

    . = ALIGN(4);
    .text :
    {
        *(.__image_copy_start)
        *(.vectors)
        CPUDIR/start.o (.text*)
        *(.text*)
    }

    . = ALIGN(4);
    .rodata : { *(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*))) }

    . = ALIGN(4);
    .data : {
        *(.data*)
    }

    . = ALIGN(4);

    . = .;

    . = ALIGN(4);
    .u_boot_list : {
        KEEP(*(SORT(.u_boot_list*)));
    }

    . = ALIGN(4);

    .image_copy_end :
    {
        *(.__image_copy_end)
    }

    .rel_dyn_start :
    {
        *(.__rel_dyn_start)
    }

    .rel.dyn : {
        *(.rel*)
    }

    .rel_dyn_end :
    {
        *(.__rel_dyn_end)
    }

    .end :
    {
        *(.__end)
    }

    _image_binary_end = .;

/*
 * Compiler-generated __bss_start and __bss_end, see arch/arm/lib/bss.c
 * __bss_base and __bss_limit are for linker only (overlay ordering)
 */

    .bss_start __rel_dyn_start (OVERLAY) : {
        KEEP(*(.__bss_start));
        __bss_base = .;
    }

    .bss __bss_base (OVERLAY) : {
        *(.bss*)
         . = ALIGN(4);
         __bss_limit = .;
    }

    .bss_end __bss_limit (OVERLAY) : {
        KEEP(*(.__bss_end));
    }

    /*
     * Zynq needs to discard these sections because the user
     * is expected to pass this image on to tools for boot.bin
     * generation that require them to be dropped.
    */
    /DISCARD/ : { *(.dynsym) }
    /DISCARD/ : { *(.dynbss*) }
    /DISCARD/ : { *(.dynstr*) }
    /DISCARD/ : { *(.dynamic*) }
    /DISCARD/ : { *(.plt*) }
    /DISCARD/ : { *(.interp*) }
    /DISCARD/ : { *(.gnu*) }
    /DISCARD/ : { *(.ARM.exidx*) }
    /DISCARD/ : { *(.gnu.linkonce.armexidx.*) }
 
}

调试dcc 试图将u-boot放入ocm运行碰到的问题

原文：https://www.cnblogs.com/idyllcheung/p/11946875.html