task_monitor_rtos/startup_stm32f446.s at main · StevenReynoso/task_monitor_rtos · GitHub

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.syntax unified
.cpu cortex-m4
.thumb

.section .isr_vector, "a", %progbits
.global _vector_table
.type _vector_table, %object
.size _vector_table, . - _vector_table

_vector_table:
    .word _estack
    .word Reset_Handler
    .word NMI
    .word Hard_Fault
    .word Mem_Manage
    .word Bus_Fault
    .word Usage_Fault
    .word 0
    .word 0
    .word 0
    .word 0
    .word SVCall
    .word Debug_Monitor
    .word 0
    .word PendSV
    .word SysTick_Handler


.section .text
.global Reset_Handler
.type Reset_Handler, %function


Reset_Handler:
    ldr r0, =_sdata
    ldr r1, =_etext
    ldr r2, =_edata

.data_copy:
    cmp r0, r2
    ittt lt
    ldrlt r3, [r1], #4
    strlt r3, [r0], #4
    blt .data_copy

    ldr r0, =_sbss
    ldr r1, =_ebss
    movs r2, #0

.bss_clear:
    cmp r0, r1
    it lt
    strlt r2, [r0], #4
    blt .bss_clear

    bl main

infinite_loop:
    b infinite_loop


.weak NMI, Hard_Fault, Mem_Manage, Bus_Fault, Usage_Fault, SVCall, Debug_Monitor, PendSV, SysTick_Handler
.thumb_set NMI,                   infinite_loop
.thumb_set Hard_Fault,            infinite_loop
.thumb_set Mem_Manage,            infinite_loop
.thumb_set Bus_Fault,             infinite_loop
.thumb_set Usage_Fault,           infinite_loop
.thumb_set SVCall,                infinite_loop
.thumb_set Debug_Monitor,         infinite_loop
.thumb_set PendSV,                infinite_loop