.cpu cortex-m4
.thumb

.extern _start
.extern fault_handler

.section .text

fault1:
    mov r0, 1
    b fault_handler
fault2:
    mov r0, 2
    b fault_handler
fault3:
    mov r0, 3
    b fault_handler
fault4:
    mov r0, 4
    b fault_handler
fault5:
    mov r0, 5
    b fault_handler

.section .bss
.skip 2048
stack_top:

.section .isr_vector
    .word stack_top
    .word _start
    .word fault1
    .word fault2
    .word fault3
    .word fault4
    .word fault5
    .skip 4 * 91