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openocd/contrib/loaders/flash/cc2538/startup.s

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  1.         .section .entry

  2.         .global entry

  3.         .syntax unified

  4.         .thumb_func

  5. entry:

  6.         /* Disable interrupts */

  7.         cpsid i

  8. 

  9.         /* Privileged mode, main stack, no floating point */

  10.         mov r0, #0

  11.         msr control, r0

  12.         isb

  13. 

  14.         /* Load initial stack pointer */

  15.         ldr r0, =_estack

  16.         mov sp, r0

  17.         isb

  18. 

  19.         /* Clear BSS */

  20.         mov r0, #0

  21.         ldr r1, =_bss

  22.         ldr r2, =_ebss

  23. 1:

  24.         cmp r1, r2

  25.         it lt

  26.         strlt r0, [r1], #4

  27.         blt 1b

  28. 

  29.         /* No need to copy initialized data, since it's already in RAM */

  30. 

  31.         /* It's safe to call C code now */

  32.         bl __libc_init_array

  33.         bl main

  34. 

  35.         /* Main returned -- hang */

  36.         b .