DFlash填充失败怎么解决？

给DFlash分配内存，如下
memory cal_rom
{
mau = 8;
size = 128k;
type = reserved nvram;
map (dest=bus:sri, dest_offset=0xaf001000, size=128k);
}
group cal_data_rom_section(ordered, contiguous, run_addr=0xAF001000)
{
section "cal_rom" (size=4K,attributes=r,fill=0xFF)
{
select "[.rodata.__cal_data_ram]";
}
}
如果把 section "cal_rom" (size=4K,attributes=r,fill=0xFF)中size的长度改为大于4，则编译会通过，但tasking  Debug的时候会报错，如下截图