----- GNU LD linker script -----

 

 

MEMORY {

    FLASH(rx) : ORIGIN = 0x10000000, LENGTH = 2048k

    SRAM(rwx) : ORIGIN = 0x20000000, LENGTH = 264k

}

 

SECTIONS {

    .text {

        *(.text*)

 

        _stack_size = 1k;

        _stack_end = ORIGIN(SRAM) + LENGTH(SRAM); // top of RAM

        _stack_start = _stack_end - _stack_size;

    } > FLASH

}

 

----- objdump -----

...

20042000 T _stack_end

20041c00 T _stack_start

10000500 T _stack_size

...

 

----- Question -----

_stack_end looks good (0x20000000 + 0x42000) [264 × 1024 = 0x42000]

_stack_start looks good (0x20042000 - 0x400) [1 × 1024 = 0x400]

_stack_size, based on the math above, should be 0x400. The math for the other two values (_stack-end - _stack_size) is correct, but the value for _stack_size makes no sense to me. Am I misunderstanding what objdump is trying to tell me?