Simulator configuration fragment.

add rom loadermem 0x1FC00000
loadermem generic 4K
loadermem load "kernel/loader.bin"

Loader entry code fragment.

.globl __start
.ent   __start

__start:

        la $ra, 0x80000400      ;hardcoded kernel entry address
        j $ra                   ;jump
        nop                     ;branch delay slot

.end __start

Kernel entry code fragment.

.section .excvec, "ax"          ;emit code into .execvec section
                                ;flags say allocatable and executable

.org   0x400                    ;hardcoded kernel entry address
.globl start
.ent   start

start:

        la $sp, 0x80000400      ;hardcoded stack pointer address
        jal main                ;jump and link
        nop                     ;branch delay slot

        halt                    ;a macro to stop the simulator

.end start

Linker script fragment.

SECTIONS {
    .kernel 0x80000000 : {      /* output section kernel with address */
        *(.excvec)              /* input section .execvec goes first */
        *(.text .text.*)        /* .text sections come next */
        *(.rodata .rodata.*)    /* .rodata sections next */
        ...