# Static Call Graph for image .\key.axf

#<CALLGRAPH># ARM Linker, 5.03 [Build 76]: Last Updated: Mon Mar 21 23:27:45 2016

### Maximum Stack Usage = 16 bytes + Unknown(Functions without stacksize, Cycles, Untraceable Function Pointers)

### Call chain for Maximum Stack Depth:

__rt_entry_main ⇒ main ⇒ KEY_Init ⇒ nrf_gpio_cfg_input

### Functions with no stack information

- __user_initial_stackheap

### Mutually Recursive functions

- NMI_Handler ⇒ NMI_Handler
- HardFault_Handler ⇒ HardFault_Handler
- SVC_Handler ⇒ SVC_Handler
- PendSV_Handler ⇒ PendSV_Handler
- SysTick_Handler ⇒ SysTick_Handler
- ADC_IRQHandler ⇒ ADC_IRQHandler
- __asm___11_nrf_delay_c_532987f3__nrf_delay_us ⇒ __asm___11_nrf_delay_c_532987f3__nrf_delay_us

  ### Function Pointers

  - ADC_IRQHandler from arm_startup_nrf51.o(.text) referenced from arm_startup_nrf51.o(RESET)
  - CCM_AAR_IRQHandler from arm_startup_nrf51.o(.text) referenced from arm_startup_nrf51.o(RESET)
  - ECB_IRQHandler from arm_startup_nrf51.o(.text) referenced from arm_startup_nrf51.o(RESET)
  - GPIOTE_IRQHandler from arm_startup_nrf51.o(.text) referenced from arm_startup_nrf51.o(RESET)
  - HardFault_Handler from arm_startup_nrf51.o(.text) referenced from arm_startup_nrf51.o(RESET)
  - LPCOMP_COMP_IRQHandler from arm_startup_nrf51.o(.text) referenced from arm_startup_nrf51.o(RESET)
  - NMI_Handler from arm_startup_nrf51.o(.text) referenced from arm_startup_nrf51.o(RESET)
  - POWER_CLOCK_IRQHandler from arm_startup_nrf51.o(.text) referenced from arm_startup_nrf51.o(RESET)
  - PendSV_Handler from arm_startup_nrf51.o(.text) referenced from arm_startup_nrf51.o(RESET)
  - QDEC_IRQHandler from arm_startup_nrf51.o(.text) referenced from arm_startup_nrf51.o(RESET)
  - RADIO_IRQHandler from arm_startup_nrf51.o(.text) referenced from arm_startup_nrf51.o(RESET)
  - RNG_IRQHandler from arm_startup_nrf51.o(.text) referenced from arm_startup_nrf51.o(RESET)
  - RTC0_IRQHandler from arm_startup_nrf51.o(.text) referenced from arm_startup_nrf51.o(RESET)
  - RTC1_IRQHandler from arm_startup_nrf51.o(.text) referenced from arm_startup_nrf51.o(RESET)
  - Reset_Handler from arm_startup_nrf51.o(.text) referenced from arm_startup_nrf51.o(RESET)
  - SPI0_TWI0_IRQHandler from arm_startup_nrf51.o(.text) referenced from arm_startup_nrf51.o(RESET)
  - SPI1_TWI1_IRQHandler from arm_startup_nrf51.o(.text) referenced from arm_startup_nrf51.o(RESET)
  - SVC_Handler from arm_startup_nrf51.o(.text) referenced from arm_startup_nrf51.o(RESET)
  - SWI0_IRQHandler from arm_startup_nrf51.o(.text) referenced from arm_startup_nrf51.o(RESET)
  - SWI1_IRQHandler from arm_startup_nrf51.o(.text) referenced from arm_startup_nrf51.o(RESET)
  - SWI2_IRQHandler from arm_startup_nrf51.o(.text) referenced from arm_startup_nrf51.o(RESET)
  - SWI3_IRQHandler from arm_startup_nrf51.o(.text) referenced from arm_startup_nrf51.o(RESET)
  - SWI4_IRQHandler from arm_startup_nrf51.o(.text) referenced from arm_startup_nrf51.o(RESET)
  - SWI5_IRQHandler from arm_startup_nrf51.o(.text) referenced from arm_startup_nrf51.o(RESET)
  - SysTick_Handler from arm_startup_nrf51.o(.text) referenced from arm_startup_nrf51.o(RESET)
  - SystemInit from system_nrf51.o(.text) referenced from arm_startup_nrf51.o(.text)
  - TEMP_IRQHandler from arm_startup_nrf51.o(.text) referenced from arm_startup_nrf51.o(RESET)
  - TIMER0_IRQHandler from arm_startup_nrf51.o(.text) referenced from arm_startup_nrf51.o(RESET)
  - TIMER1_IRQHandler from arm_startup_nrf51.o(.text) referenced from arm_startup_nrf51.o(RESET)
  - TIMER2_IRQHandler from arm_startup_nrf51.o(.text) referenced from arm_startup_nrf51.o(RESET)
  - UART0_IRQHandler from arm_startup_nrf51.o(.text) referenced from arm_startup_nrf51.o(RESET)
  - WDT_IRQHandler from arm_startup_nrf51.o(.text) referenced from arm_startup_nrf51.o(RESET)
  - __main from __main.o(!!!main) referenced from arm_startup_nrf51.o(.text)

  ### Global Symbols

  __main (Thumb, 8 bytes, Stack size 0 bytes, __main.o(!!!main))
  [Calls]

  - >> __scatterload
  - >> __rt_entry

  __scatterload (Thumb, 0 bytes, Stack size unknown bytes, __scatter.o(!!!scatter))
  [Called By]

  - >> __main

  __scatterload_rt2 (Thumb, 52 bytes, Stack size unknown bytes, __scatter.o(!!!scatter), UNUSED)
  [Calls]

  - >> __rt_entry

  __scatterload_rt2_thumb_only (Thumb, 0 bytes, Stack size unknown bytes, __scatter.o(!!!scatter), UNUSED)

  __scatterload_null (Thumb, 0 bytes, Stack size unknown bytes, __scatter.o(!!!scatter), UNUSED)

  __scatterload_copy (Thumb, 26 bytes, Stack size unknown bytes, __scatter_copy.o(!!handler_copy), UNUSED)
  [Calls]

  - >> __scatterload_copy
  [Called By]
  - >> __scatterload_copy

  __scatterload_zeroinit (Thumb, 28 bytes, Stack size unknown bytes, __scatter_zi.o(!!handler_zi), UNUSED)

  __rt_lib_init (Thumb, 0 bytes, Stack size unknown bytes, libinit.o(.ARM.Collect$$libinit$$00000000))
  [Called By]

  - >> __rt_entry_li

  __rt_lib_init_fp_1 (Thumb, 0 bytes, Stack size unknown bytes, libinit2.o(.ARM.Collect$$libinit$$00000001))

  __rt_lib_init_alloca_1 (Thumb, 0 bytes, Stack size unknown bytes, libinit2.o(.ARM.Collect$$libinit$$0000002C))

  __rt_lib_init_argv_1 (Thumb, 0 bytes, Stack size unknown bytes, libinit2.o(.ARM.Collect$$libinit$$0000002A))

  __rt_lib_init_atexit_1 (Thumb, 0 bytes, Stack size unknown bytes, libinit2.o(.ARM.Collect$$libinit$$00000019))

  __rt_lib_init_clock_1 (Thumb, 0 bytes, Stack size unknown bytes, libinit2.o(.ARM.Collect$$libinit$$0000001F))

  __rt_lib_init_cpp_1 (Thumb, 0 bytes, Stack size unknown bytes, libinit2.o(.ARM.Collect$$libinit$$00000030))

  __rt_lib_init_exceptions_1 (Thumb, 0 bytes, Stack size unknown bytes, libinit2.o(.ARM.Collect$$libinit$$0000002E))

  __rt_lib_init_fp_trap_1 (Thumb, 0 bytes, Stack size unknown bytes, libinit2.o(.ARM.Collect$$libinit$$0000001D))

  __rt_lib_init_getenv_1 (Thumb, 0 bytes, Stack size unknown bytes, libinit2.o(.ARM.Collect$$libinit$$00000021))

  __rt_lib_init_heap_1 (Thumb, 0 bytes, Stack size unknown bytes, libinit2.o(.ARM.Collect$$libinit$$00000008))

  __rt_lib_init_lc_collate_1 (Thumb, 0 bytes, Stack size unknown bytes, libinit2.o(.ARM.Collect$$libinit$$0000000F))

  __rt_lib_init_lc_ctype_1 (Thumb, 0 bytes, Stack size unknown bytes, libinit2.o(.ARM.Collect$$libinit$$00000011))

  __rt_lib_init_lc_monetary_1 (Thumb, 0 bytes, Stack size unknown bytes, libinit2.o(.ARM.Collect$$libinit$$00000013))

  __rt_lib_init_lc_numeric_1 (Thumb, 0 bytes, Stack size unknown bytes, libinit2.o(.ARM.Collect$$libinit$$00000015))

  __rt_lib_init_lc_time_1 (Thumb, 0 bytes, Stack size unknown bytes, libinit2.o(.ARM.Collect$$libinit$$00000017))

  __rt_lib_init_rand_1 (Thumb, 0 bytes, Stack size unknown bytes, libinit2.o(.ARM.Collect$$libinit$$0000000C))

  __rt_lib_init_return (Thumb, 0 bytes, Stack size unknown bytes, libinit2.o(.ARM.Collect$$libinit$$00000031))

  __rt_lib_init_signal_1 (Thumb, 0 bytes, Stack size unknown bytes, libinit2.o(.ARM.Collect$$libinit$$0000001B))

  __rt_lib_init_stdio_1 (Thumb, 0 bytes, Stack size unknown bytes, libinit2.o(.ARM.Collect$$libinit$$00000023))

  __rt_lib_init_user_alloc_1 (Thumb, 0 bytes, Stack size unknown bytes, libinit2.o(.ARM.Collect$$libinit$$0000000A))

  __rt_lib_shutdown (Thumb, 0 bytes, Stack size unknown bytes, libshutdown.o(.ARM.Collect$$libshutdown$$00000000))
  [Called By]

  - >> __rt_exit_ls

  __rt_lib_shutdown_fp_trap_1 (Thumb, 0 bytes, Stack size unknown bytes, libshutdown2.o(.ARM.Collect$$libshutdown$$00000006))

  __rt_lib_shutdown_heap_1 (Thumb, 0 bytes, Stack size unknown bytes, libshutdown2.o(.ARM.Collect$$libshutdown$$0000000E))

  __rt_lib_shutdown_return (Thumb, 0 bytes, Stack size unknown bytes, libshutdown2.o(.ARM.Collect$$libshutdown$$0000000F))

  __rt_lib_shutdown_signal_1 (Thumb, 0 bytes, Stack size unknown bytes, libshutdown2.o(.ARM.Collect$$libshutdown$$00000009))

  __rt_lib_shutdown_stdio_1 (Thumb, 0 bytes, Stack size unknown bytes, libshutdown2.o(.ARM.Collect$$libshutdown$$00000003))

  __rt_lib_shutdown_user_alloc_1 (Thumb, 0 bytes, Stack size unknown bytes, libshutdown2.o(.ARM.Collect$$libshutdown$$0000000B))

  __rt_entry (Thumb, 0 bytes, Stack size unknown bytes, rtentry.o(.ARM.Collect$$rtentry$$00000000))
  [Called By]

  - >> __scatterload_rt2
  - >> __main

  __rt_entry_presh_1 (Thumb, 0 bytes, Stack size unknown bytes, rtentry2.o(.ARM.Collect$$rtentry$$00000002))

  __rt_entry_sh (Thumb, 0 bytes, Stack size unknown bytes, rtentry4.o(.ARM.Collect$$rtentry$$00000004))
  [Stack]

  - Max Depth = 8 + Unknown Stack Size
  - Call Chain = __rt_entry_sh ⇒ __user_setup_stackheap
  [Calls]
  - >> __user_setup_stackheap

  __rt_entry_li (Thumb, 0 bytes, Stack size unknown bytes, rtentry2.o(.ARM.Collect$$rtentry$$0000000A))
  [Calls]

  - >> __rt_lib_init

  __rt_entry_postsh_1 (Thumb, 0 bytes, Stack size unknown bytes, rtentry2.o(.ARM.Collect$$rtentry$$00000009))

  __rt_entry_main (Thumb, 0 bytes, Stack size unknown bytes, rtentry2.o(.ARM.Collect$$rtentry$$0000000D))
  [Stack]

  - Max Depth = 16 + Unknown Stack Size
  - Call Chain = __rt_entry_main ⇒ main ⇒ KEY_Init ⇒ nrf_gpio_cfg_input
  [Calls]
  - >> exit
  - >> main

  __rt_entry_postli_1 (Thumb, 0 bytes, Stack size unknown bytes, rtentry2.o(.ARM.Collect$$rtentry$$0000000C))

  __rt_exit (Thumb, 0 bytes, Stack size unknown bytes, rtexit.o(.ARM.Collect$$rtexit$$00000000))
  [Called By]

  - >> exit

  __rt_exit_ls (Thumb, 0 bytes, Stack size unknown bytes, rtexit2.o(.ARM.Collect$$rtexit$$00000003))
  [Calls]

  - >> __rt_lib_shutdown

  __rt_exit_prels_1 (Thumb, 0 bytes, Stack size unknown bytes, rtexit2.o(.ARM.Collect$$rtexit$$00000002))

  __rt_exit_exit (Thumb, 0 bytes, Stack size unknown bytes, rtexit2.o(.ARM.Collect$$rtexit$$00000004))
  [Calls]

  - >> _sys_exit

  __asm___11_nrf_delay_c_532987f3__nrf_delay_us (Thumb, 30 bytes, Stack size 0 bytes, nrf_delay.o(.emb_text))
  [Calls]

  - >> __asm___11_nrf_delay_c_532987f3__nrf_delay_us
  [Called By]
  - >> __asm___11_nrf_delay_c_532987f3__nrf_delay_us
  - >> nrf_delay_ms

  Reset_Handler (Thumb, 18 bytes, Stack size 0 bytes, arm_startup_nrf51.o(.text))
  [Address Reference Count : 1]

  - arm_startup_nrf51.o(RESET)

  NMI_Handler (Thumb, 2 bytes, Stack size 0 bytes, arm_startup_nrf51.o(.text))
  [Calls]

  - >> NMI_Handler
  [Called By]
  - >> NMI_Handler
  [Address Reference Count : 1]
  - arm_startup_nrf51.o(RESET)

  HardFault_Handler (Thumb, 2 bytes, Stack size 0 bytes, arm_startup_nrf51.o(.text))
  [Calls]

  - >> HardFault_Handler
  [Called By]
  - >> HardFault_Handler
  [Address Reference Count : 1]
  - arm_startup_nrf51.o(RESET)

  SVC_Handler (Thumb, 2 bytes, Stack size 0 bytes, arm_startup_nrf51.o(.text))
  [Calls]

  - >> SVC_Handler
  [Called By]
  - >> SVC_Handler
  [Address Reference Count : 1]
  - arm_startup_nrf51.o(RESET)

  PendSV_Handler (Thumb, 2 bytes, Stack size 0 bytes, arm_startup_nrf51.o(.text))
  [Calls]

  - >> PendSV_Handler
  [Called By]
  - >> PendSV_Handler
  [Address Reference Count : 1]
  - arm_startup_nrf51.o(RESET)

  SysTick_Handler (Thumb, 2 bytes, Stack size 0 bytes, arm_startup_nrf51.o(.text))
  [Calls]

  - >> SysTick_Handler
  [Called By]
  - >> SysTick_Handler
  [Address Reference Count : 1]
  - arm_startup_nrf51.o(RESET)

  ADC_IRQHandler (Thumb, 0 bytes, Stack size 0 bytes, arm_startup_nrf51.o(.text))
  [Calls]

  - >> ADC_IRQHandler
  [Called By]
  - >> ADC_IRQHandler
  [Address Reference Count : 1]
  - arm_startup_nrf51.o(RESET)

  CCM_AAR_IRQHandler (Thumb, 0 bytes, Stack size 0 bytes, arm_startup_nrf51.o(.text))
  [Address Reference Count : 1]

  - arm_startup_nrf51.o(RESET)

  ECB_IRQHandler (Thumb, 0 bytes, Stack size 0 bytes, arm_startup_nrf51.o(.text))
  [Address Reference Count : 1]

  - arm_startup_nrf51.o(RESET)

  GPIOTE_IRQHandler (Thumb, 0 bytes, Stack size 0 bytes, arm_startup_nrf51.o(.text))
  [Address Reference Count : 1]

  - arm_startup_nrf51.o(RESET)

  LPCOMP_COMP_IRQHandler (Thumb, 0 bytes, Stack size 0 bytes, arm_startup_nrf51.o(.text))
  [Address Reference Count : 1]

  - arm_startup_nrf51.o(RESET)

  POWER_CLOCK_IRQHandler (Thumb, 0 bytes, Stack size 0 bytes, arm_startup_nrf51.o(.text))
  [Address Reference Count : 1]

  - arm_startup_nrf51.o(RESET)

  QDEC_IRQHandler (Thumb, 0 bytes, Stack size 0 bytes, arm_startup_nrf51.o(.text))
  [Address Reference Count : 1]

  - arm_startup_nrf51.o(RESET)

  RADIO_IRQHandler (Thumb, 0 bytes, Stack size 0 bytes, arm_startup_nrf51.o(.text))
  [Address Reference Count : 1]

  - arm_startup_nrf51.o(RESET)

  RNG_IRQHandler (Thumb, 0 bytes, Stack size 0 bytes, arm_startup_nrf51.o(.text))
  [Address Reference Count : 1]

  - arm_startup_nrf51.o(RESET)

  RTC0_IRQHandler (Thumb, 0 bytes, Stack size 0 bytes, arm_startup_nrf51.o(.text))
  [Address Reference Count : 1]

  - arm_startup_nrf51.o(RESET)

  RTC1_IRQHandler (Thumb, 0 bytes, Stack size 0 bytes, arm_startup_nrf51.o(.text))
  [Address Reference Count : 1]

  - arm_startup_nrf51.o(RESET)

  SPI0_TWI0_IRQHandler (Thumb, 0 bytes, Stack size 0 bytes, arm_startup_nrf51.o(.text))
  [Address Reference Count : 1]

  - arm_startup_nrf51.o(RESET)

  SPI1_TWI1_IRQHandler (Thumb, 0 bytes, Stack size 0 bytes, arm_startup_nrf51.o(.text))
  [Address Reference Count : 1]

  - arm_startup_nrf51.o(RESET)

  SWI0_IRQHandler (Thumb, 0 bytes, Stack size 0 bytes, arm_startup_nrf51.o(.text))
  [Address Reference Count : 1]

  - arm_startup_nrf51.o(RESET)

  SWI1_IRQHandler (Thumb, 0 bytes, Stack size 0 bytes, arm_startup_nrf51.o(.text))
  [Address Reference Count : 1]

  - arm_startup_nrf51.o(RESET)

  SWI2_IRQHandler (Thumb, 0 bytes, Stack size 0 bytes, arm_startup_nrf51.o(.text))
  [Address Reference Count : 1]

  - arm_startup_nrf51.o(RESET)

  SWI3_IRQHandler (Thumb, 0 bytes, Stack size 0 bytes, arm_startup_nrf51.o(.text))
  [Address Reference Count : 1]

  - arm_startup_nrf51.o(RESET)

  SWI4_IRQHandler (Thumb, 0 bytes, Stack size 0 bytes, arm_startup_nrf51.o(.text))
  [Address Reference Count : 1]

  - arm_startup_nrf51.o(RESET)

  SWI5_IRQHandler (Thumb, 0 bytes, Stack size 0 bytes, arm_startup_nrf51.o(.text))
  [Address Reference Count : 1]

  - arm_startup_nrf51.o(RESET)

  TEMP_IRQHandler (Thumb, 0 bytes, Stack size 0 bytes, arm_startup_nrf51.o(.text))
  [Address Reference Count : 1]

  - arm_startup_nrf51.o(RESET)

  TIMER0_IRQHandler (Thumb, 0 bytes, Stack size 0 bytes, arm_startup_nrf51.o(.text))
  [Address Reference Count : 1]

  - arm_startup_nrf51.o(RESET)

  TIMER1_IRQHandler (Thumb, 0 bytes, Stack size 0 bytes, arm_startup_nrf51.o(.text))
  [Address Reference Count : 1]

  - arm_startup_nrf51.o(RESET)

  TIMER2_IRQHandler (Thumb, 0 bytes, Stack size 0 bytes, arm_startup_nrf51.o(.text))
  [Address Reference Count : 1]

  - arm_startup_nrf51.o(RESET)

  UART0_IRQHandler (Thumb, 0 bytes, Stack size 0 bytes, arm_startup_nrf51.o(.text))
  [Address Reference Count : 1]

  - arm_startup_nrf51.o(RESET)

  WDT_IRQHandler (Thumb, 0 bytes, Stack size 0 bytes, arm_startup_nrf51.o(.text))
  [Address Reference Count : 1]

  - arm_startup_nrf51.o(RESET)

  __user_initial_stackheap (Thumb, 0 bytes, Stack size unknown bytes, arm_startup_nrf51.o(.text))
  [Called By]

  - >> __user_setup_stackheap

  SystemCoreClockUpdate (Thumb, 8 bytes, Stack size 0 bytes, system_nrf51.o(.text), UNUSED)

  SystemInit (Thumb, 38 bytes, Stack size 8 bytes, system_nrf51.o(.text))
  [Stack]

  - Max Depth = 8
  - Call Chain = SystemInit
  [Calls]
  - >> is_manual_peripheral_setup_needed
  - >> is_disabled_in_debug_needed
  [Address Reference Count : 1]
  - arm_startup_nrf51.o(.text)

  main (Thumb, 82 bytes, Stack size 0 bytes, main.o(.text))
  [Stack]

  - Max Depth = 16
  - Call Chain = main ⇒ KEY_Init ⇒ nrf_gpio_cfg_input
  [Calls]
  - >> LED_Toggle
  - >> LED_Init
  - >> KEY_Init
  - >> KEY_Down
  [Called By]
  - >> __rt_entry_main

  KEY_Init (Thumb, 36 bytes, Stack size 8 bytes, key.o(.text))
  [Stack]

  - Max Depth = 16
  - Call Chain = KEY_Init ⇒ nrf_gpio_cfg_input
  [Calls]
  - >> nrf_gpio_cfg_input
  [Called By]
  - >> main

  Delay (Thumb, 10 bytes, Stack size 0 bytes, key.o(.text), UNUSED)

  KEY_Down (Thumb, 54 bytes, Stack size 8 bytes, key.o(.text))
  [Stack]

  - Max Depth = 16
  - Call Chain = KEY_Down ⇒ nrf_delay_ms
  [Calls]
  - >> nrf_delay_ms
  - >> nrf_gpio_pin_read
  [Called By]
  - >> main

  LED_Init (Thumb, 34 bytes, Stack size 8 bytes, led.o(.text))
  [Stack]

  - Max Depth = 8
  - Call Chain = LED_Init
  [Called By]
  - >> main

  LED_Open (Thumb, 14 bytes, Stack size 0 bytes, led.o(.text), UNUSED)

  LED_Close (Thumb, 14 bytes, Stack size 0 bytes, led.o(.text), UNUSED)

  LED_Toggle (Thumb, 20 bytes, Stack size 0 bytes, led.o(.text))
  [Called By]

  - >> main

  nrf_delay_ms (Thumb, 24 bytes, Stack size 8 bytes, nrf_delay.o(.text))
  [Stack]

  - Max Depth = 8
  - Call Chain = nrf_delay_ms
  [Calls]
  - >> __asm___11_nrf_delay_c_532987f3__nrf_delay_us
  [Called By]
  - >> KEY_Down

  __use_two_region_memory (Thumb, 2 bytes, Stack size 0 bytes, heapauxi.o(.text), UNUSED)

  __rt_heap_escrow$2region (Thumb, 2 bytes, Stack size 0 bytes, heapauxi.o(.text), UNUSED)

  __rt_heap_expand$2region (Thumb, 2 bytes, Stack size 0 bytes, heapauxi.o(.text), UNUSED)

  __user_setup_stackheap (Thumb, 62 bytes, Stack size 8 bytes, sys_stackheap_outer.o(.text))
  [Stack]

  - Max Depth = 8 + Unknown Stack Size
  - Call Chain = __user_setup_stackheap
  [Calls]
  - >> __user_perproc_libspace
  - >> __user_initial_stackheap
  [Called By]
  - >> __rt_entry_sh

  exit (Thumb, 12 bytes, Stack size 0 bytes, exit.o(.text))
  [Calls]

  - >> __rt_exit
  - >> _call_atexit_fns (Weak Reference)
  [Called By]
  - >> __rt_entry_main

  __user_libspace (Thumb, 8 bytes, Stack size 0 bytes, libspace.o(.text), UNUSED)

  __user_perproc_libspace (Thumb, 0 bytes, Stack size 0 bytes, libspace.o(.text))
  [Called By]

  - >> __user_setup_stackheap

  __user_perthread_libspace (Thumb, 0 bytes, Stack size 0 bytes, libspace.o(.text), UNUSED)

  _sys_exit (Thumb, 8 bytes, Stack size 0 bytes, sys_exit.o(.text))
  [Called By]

  - >> __rt_exit_exit

  __I$use$semihosting (Thumb, 0 bytes, Stack size 0 bytes, use_no_semi.o(.text), UNUSED)

  __use_no_semihosting_swi (Thumb, 2 bytes, Stack size 0 bytes, use_no_semi.o(.text), UNUSED)

  __semihosting_library_function (Thumb, 0 bytes, Stack size unknown bytes, indicate_semi.o(.text), UNUSED)

  ### Local Symbols

  is_disabled_in_debug_needed (Thumb, 48 bytes, Stack size 0 bytes, system_nrf51.o(.text))
  [Called By]

  - >> SystemInit

  is_manual_peripheral_setup_needed (Thumb, 94 bytes, Stack size 0 bytes, system_nrf51.o(.text))
  [Called By]

  - >> SystemInit

  nrf_gpio_cfg_input (Thumb, 20 bytes, Stack size 8 bytes, key.o(.text))
  [Stack]

  - Max Depth = 8
  - Call Chain = nrf_gpio_cfg_input
  [Called By]
  - >> KEY_Init

  nrf_gpio_pin_read (Thumb, 14 bytes, Stack size 0 bytes, key.o(.text))
  [Called By]

  - >> KEY_Down

  ### Undefined Global Symbols

  _call_atexit_fns (ARM, 0 bytes, Stack size 0 bytes, UNDEFINED)
  [Called By]

  - >> exit