laurelin/src/startup.S
2019-12-10 23:19:01 +01:00

173 lines
3.4 KiB
ArmAsm

.syntax unified
.thumb
.global Reset_Handler
.type Reset_Handler, %function
Reset_Handler:
init_data:
ldr r2, =_start_init_data
ldr r3, =_start_data
ldr r1, =_end_data
init_data_loop:
cmp r3, r1
bhs zero_bss
ldr r0, [r2]
str r0, [r3]
adds r2, r2, #4
adds r3, r3, #4
b init_data_loop
zero_bss:
ldr r3, =_start_bss
ldr r1, =_end_bss
movs r0, #0
zero_bss_loop:
cmp r3, r1
bhs init_finished
str r0, [r3]
adds r3, r3, #4
b zero_bss_loop
init_finished:
bl SystemInit
bl __libc_init_array
bl main
infinite_loop:
b infinite_loop
.size Reset_Handler, .-Reset_Handler
.section .vectors, "a"
.word _end_stack
.word Reset_Handler
.word NMI_Handler
.word HardFault_Handler
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word SVC_Handler
.word 0
.word 0
.word PendSV_Handler
.word SysTick_Handler
.word WWDG_IRQHandler
.word 0
.word RTC_IRQHandler
.word FLASH_IRQHandler
.word RCC_IRQHandler
.word EXTI0_1_IRQHandler
.word EXTI2_3_IRQHandler
.word EXTI4_15_IRQHandler
.word 0
.word DMA1_Channel1_IRQHandler
.word DMA1_Channel2_3_IRQHandler
.word DMA1_Channel4_5_IRQHandler
.word ADC1_IRQHandler
.word TIM1_BRK_UP_TRG_COM_IRQHandler
.word TIM1_CC_IRQHandler
.word 0
.word TIM3_IRQHandler
.word 0
.word 0
.word TIM14_IRQHandler
.word 0
.word TIM16_IRQHandler
.word TIM17_IRQHandler
.word I2C1_IRQHandler
.word 0
.word SPI1_IRQHandler
.word 0
.word USART1_IRQHandler
.word 0
.word 0
.word 0
.word 0
.type Dummy_Handler, %function
Dummy_Handler:
b Dummy_Handler
.weak NMI_Handler
.thumb_set NMI_Handler, Dummy_Handler
.weak HardFault_Handler
.thumb_set HardFault_Handler, Dummy_Handler
.weak SVC_Handler
.thumb_set SVC_Handler, Dummy_Handler
.weak PendSV_Handler
.thumb_set PendSV_Handler, Dummy_Handler
.weak SysTick_Handler
.thumb_set SysTick_Handler, Dummy_Handler
.weak WWDG_IRQHandler
.thumb_set WWDG_IRQHandler, Dummy_Handler
.weak RTC_IRQHandler
.thumb_set RTC_IRQHandler, Dummy_Handler
.weak FLASH_IRQHandler
.thumb_set FLASH_IRQHandler, Dummy_Handler
.weak RCC_IRQHandler
.thumb_set RCC_IRQHandler, Dummy_Handler
.weak EXTI0_1_IRQHandler
.thumb_set EXTI0_1_IRQHandler, Dummy_Handler
.weak EXTI2_3_IRQHandler
.thumb_set EXTI2_3_IRQHandler, Dummy_Handler
.weak EXTI4_15_IRQHandler
.thumb_set EXTI4_15_IRQHandler, Dummy_Handler
.weak DMA1_Channel1_IRQHandler
.thumb_set DMA1_Channel1_IRQHandler, Dummy_Handler
.weak DMA1_Channel2_3_IRQHandler
.thumb_set DMA1_Channel2_3_IRQHandler, Dummy_Handler
.weak DMA1_Channel4_5_IRQHandler
.thumb_set DMA1_Channel4_5_IRQHandler, Dummy_Handler
.weak ADC1_IRQHandler
.thumb_set ADC1_IRQHandler, Dummy_Handler
.weak TIM1_BRK_UP_TRG_COM_IRQHandler
.thumb_set TIM1_BRK_UP_TRG_COM_IRQHandler, Dummy_Handler
.weak TIM1_CC_IRQHandler
.thumb_set TIM1_CC_IRQHandler, Dummy_Handler
.weak TIM3_IRQHandler
.thumb_set TIM3_IRQHandler, Dummy_Handler
.weak TIM14_IRQHandler
.thumb_set TIM14_IRQHandler, Dummy_Handler
.weak TIM16_IRQHandler
.thumb_set TIM16_IRQHandler, Dummy_Handler
.weak TIM17_IRQHandler
.thumb_set TIM17_IRQHandler, Dummy_Handler
.weak I2C1_IRQHandler
.thumb_set I2C1_IRQHandler, Dummy_Handler
.weak SPI1_IRQHandler
.thumb_set SPI1_IRQHandler, Dummy_Handler
.weak USART1_IRQHandler
.thumb_set USART1_IRQHandler, Dummy_Handler