_start = ORIGIN(FLASH);
ENTRY(_start)

MEMORY
{
    FLASH (xrx)      :ORIGIN = 0x10000000, LENGTH = 256K
    RAM (xrw)        :ORIGIN = 0x20000000, LENGTH = 256K
    STACK (rw)       :ORIGIN = 0x20040000, LENGTH = 8K - 256
    AUTO(xrx)        :ORIGIN = 0x20041F00, LENGTH = 256
}

_stack_top = ORIGIN(STACK) + LENGTH(STACK);

PHDRS
{
    boot2_pre PT_LOAD FLAGS(5); /* R + X */
    text PT_LOAD FLAGS(5);      /* R + X */
    rodata PT_LOAD FLAGS(5);    /* R + W */
    data PT_LOAD FLAGS(6);      /* R + W */
    bss PT_LOAD FLAGS(6);       /* R + W */
}

SECTIONS
{
    .boot2_pre :
    {
        KEEP(*(.text.boot2_pre))
        _boot2_pre_size = . - ADDR(.boot2_pre);
        ASSERT(_boot2_pre_size <= 252, "Error: .boot2_pre size exceeds 252 bytes!");
        . += 256 - _boot2_pre_size;
    } >AUTO AT > FLASH :boot2_pre

    .text :
    {
        . = ALIGN(4);
        *(.text*)
        . = ALIGN(4);
    } >RAM AT > FLASH :text

    .rodata :
    {
        . = ALIGN(4);
        *(.rodata*)
        . = ALIGN(4);
    } >RAM AT > FLASH :rodata

    .data :
    {
        . = ALIGN(4);
        *(.data*)
        . = ALIGN(4);
    } >RAM AT > FLASH :data

    .bss (NOLOAD) :
    {
        . = ALIGN(4);
        _bss_start = .;
        *(.bss*)
        . = ALIGN(4);
        _bss_end = .;
    } >RAM :bss
}