Nios V, Max10, C++: region `reset' overflowed by 4 bytes

I think I found an answer. My Nios Reset was pointing to on-chip memory, with base 0xc000000.

.text was in external ddr3 at base 0x0, and __start was at 0x804.

Generating the linker map I see:

.entry          0x000000000c000000       0x24
 *(.entry)
 .entry         0x000000000c000000       0x24 freertos_bsp/libfreertos_bsp.a(crt0.S.obj)
                0x000000000c000000                __reset

Which tells me the only thing in the .entry section is __reset, and this is __reset in crt0.S:

    .section .entry, "xa"
    .align 5

    .globl __reset
    .type __reset, @function
__reset:
/*
 * Jump to the _start entry point in the .text section if reset code
 * is allowed or if optimizing for RTL simulation.
 */

    /* Jump to the _start entry point in the .text section. */
    tail _start

    .size __reset, . - __reset

I'm wondering if the "tail _start" instruction had to be encoded with extra bits because I'm jumping from 0xc000000 to 0x804?

When I switched my Nios reset to also point to external ddr3, then my C++ compiled ok.

Now my .entry is at 0x0, and _start is still 0x804.

Does that seem like a reasonable explanation?