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Section's question

Hi, Everyone

I need your help.I use TM4C129x.
I wanna set .ID section to the end of used Flash area.
My Liker Command File is like this .

==============================
MEMORY
{
    /* Application stored in and executes from internal flash */
    FLASH (RX) : origin = APP_BASE, length = 0x00010000
    /* Application uses internal RAM for data */
    SRAM (RWX) : origin = 0x20000000, length = 0x00040000
}

/* Section allocation in memory */

SECTIONS
{
    .intvecs:   > APP_BASE
    .text   :   > FLASH
    .const  :   > FLASH
    .cinit  :   > FLASH
    .pinit  :   > FLASH
    .init_array : > FLASH
    .ID  :   > FLASH <--------I wanna set this Section to the end of used FLASH

    .vtable :   > RAM_BASE
    .data   :   > SRAM
    .bss    :   > SRAM
    .sysmem :   > SRAM
    .stack  :   > SRAM
}
==============================

I do not want to fix address for .ID section.
Because I wanna make sure used Flash when we do update.

Do you have any idea?

Best regards
Hiroyasu