88 lines
1.8 KiB
ArmAsm
88 lines
1.8 KiB
ArmAsm
.syntax unified
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.thumb
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.fpu softvfp
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.global Reset_Handler
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.type Reset_Handler, %function
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Reset_Handler:
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init_data:
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ldr r2, =_start_init_data
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ldr r3, =_start_data
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ldr r1, =_end_data
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init_data_loop:
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cmp r3, r1
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bhs zero_bss
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ldr r0, [r2], #4
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str r0, [r3], #4
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b init_data_loop
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zero_bss:
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ldr r3, =_start_bss
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ldr r1, =_end_bss
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movs r0, #0
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zero_bss_loop:
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cmp r3, r1
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bhs init_finished
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str r0, [r3], #4
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b zero_bss_loop
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init_finished:
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bl main
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infinite_loop:
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b infinite_loop
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.size Reset_Handler, .-Reset_Handler
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// Only the core interrupt vectors, since the bootloader code does not use
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// interrupts. Saves a few bytes to omit the interrupt vector table.
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.section .cortex_vectors, "a"
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.word _end_stack
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.word Reset_Handler
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.word NMI_Handler
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.word HardFault_Handler
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.word MemManage_Handler
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.word BusFault_Handler
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.word UsageFault_Handler
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.word 0x00000000
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.word 0x00000000
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.word 0x00000000
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.word 0x00000000
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.word SVC_Handler
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.word DebugMon_Handler
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.word 0x00000000
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.word PendSV_Handler
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.word SysTick_Handler
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.type Dummy_Handler, %function
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Dummy_Handler:
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b Dummy_Handler
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.weak NMI_Handler
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.thumb_set NMI_Handler, Dummy_Handler
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.weak HardFault_Handler
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.thumb_set HardFault_Handler, Dummy_Handler
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.weak MemManage_Handler
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.thumb_set MemManage_Handler, Dummy_Handler
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.weak BusFault_Handler
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.thumb_set BusFault_Handler, Dummy_Handler
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.weak UsageFault_Handler
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.thumb_set UsageFault_Handler, Dummy_Handler
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.weak SVC_Handler
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.thumb_set SVC_Handler, Dummy_Handler
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.weak DebugMon_Handler
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.thumb_set DebugMon_Handler, Dummy_Handler
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.weak PendSV_Handler
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.thumb_set PendSV_Handler, Dummy_Handler
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.weak SysTick_Handler
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.thumb_set SysTick_Handler, Dummy_Handler
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