.syntax unified
.cpu cortex-m3
.fpu softvfp
.thumb
.global g_pfnVectors
;; .global ProgramVector
;; .global vector
/* start address for the initialization values of the .data section.
defined in linker script */
.word _sidata
/* start address for the .data section. defined in linker script */
.word _sdata
/* end address for the .data section. defined in linker script */
.word _edata
/* start address for the .bss section. defined in linker script */
.word _sbss
/* end address for the .bss section. defined in linker script */
.word _ebss
/* stack used for SystemInit_ExtMemCtl; always internal RAM used */
.section .text.Reset_Handler
.weak Reset_Handler
.type Reset_Handler, %function
Reset_Handler:
/* Copy the data segment initializers from flash to SRAM */
movs r1, #0
b LoopCopyDataInit
CopyDataInit:
ldr r3, =_sidata
ldr r3, [r3, r1]
str r3, [r0, r1]
adds r1, r1, #4
LoopCopyDataInit:
ldr r0, =_sdata
ldr r3, =_edata
adds r2, r0, r1
cmp r2, r3
bcc CopyDataInit
/* Zero fill the bss segment. */
ldr r2, =_sbss
b LoopFillZerobss
FillZerobss:
movs r3, #0
str r3, [r2], #4
LoopFillZerobss:
ldr r3, = _ebss
cmp r2, r3
bcc FillZerobss
/* Call static constructors */
bl __libc_init_array
/*
ldr r12,=__libc_init_array
mov lr,pc
bx r12
*/
/* Call the application's entry point.*/
bl main
/*
lrd r12,=main
mov lr,pc
bx r12
*/
bx lr
.size Reset_Handler, .-Reset_Handler
.section .program_header,"a",%progbits
.type g_pfnVectors, %object
.size g_pfnVectors, .-g_pfnVectors
g_pfnVectors:
.word 0XDADAC0DE /* magic */
.word _startprog /* link base address */
.word _endprog /* end of program */
.word Reset_Handler /* code entry point */
.word _stack /* stack start */
.word _estack /* stack end */
.word _programvector
.include "progname.s"