tool/mbed/mbed-sdk/libraries/mbed/targets/cmsis/TOOLCHAIN_IAR/cmain.s

   1 /**************************************************
   2  *
   3  * Part two of the system initialization code, contains C-level
   4  * initialization, thumb-2 only variant.
   5  *
   6  * Copyright 2006 IAR Systems. All rights reserved.
   7  *
   8  * $Revision: 59783 $
   9  *
  10  **************************************************/
  11
  12
  13 ; --------------------------------------------------
  14 ; Module ?cmain, C-level initialization.
  15 ;
  16
  17
  18         SECTION SHT$$PREINIT_ARRAY:CONST:NOROOT(2)
  19         SECTION SHT$$INIT_ARRAY:CONST:NOROOT(2)
  20
  21         SECTION .text:CODE:NOROOT(2)
  22
  23         PUBLIC  __cmain
  24         ;; Keep ?main for legacy reasons, it is accessed in countless instances of cstartup.s around the world...
  25         PUBLIC  ?main
  26         EXTWEAK __iar_data_init3
  27         EXTWEAK __iar_argc_argv
  28         EXTERN  __low_level_init
  29         EXTERN  __call_ctors
  30         EXTERN  main
  31         EXTERN  exit
  32         EXTERN  __iar_dynamic_initialization
  33         EXTERN mbed_sdk_init
  34         EXTERN SystemInit
  35
  36         THUMB
  37 __cmain:
  38 ?main:
  39
  40 ; Initialize segments.
  41 ; __segment_init and __low_level_init are assumed to use the same
  42 ; instruction set and to be reachable by BL from the ICODE segment
  43 ; (it is safest to link them in segment ICODE).
  44
  45           FUNCALL __cmain, __low_level_init
  46         bl      __low_level_init
  47         cmp     r0,#0
  48         beq     ?l1
  49           FUNCALL __cmain, __iar_data_init3
  50         bl      __iar_data_init3
  51         MOVS    r0,#0             ;  No parameters
  52         FUNCALL __cmain, mbed_sdk_init
  53         BL      mbed_sdk_init
  54         MOVS    r0,#0             ;  No parameters
  55           FUNCALL __cmain, __iar_dynamic_initialization
  56         BL      __iar_dynamic_initialization   ; C++ dynamic initialization
  57
  58 ?l1:
  59         REQUIRE ?l3
  60
  61         SECTION .text:CODE:NOROOT(2)
  62
  63         PUBLIC  _main
  64         PUBLIC _call_main
  65         THUMB
  66
  67 __iar_init$$done:                 ; Copy initialization is done
  68
  69 ?l3:
  70 _call_main:
  71         MOVS    r0,#0             ;  No parameters
  72           FUNCALL __cmain, __iar_argc_argv
  73         BL      __iar_argc_argv   ; Maybe setup command line
  74
  75           FUNCALL __cmain, main
  76         BL      main
  77 _main:
  78           FUNCALL __cmain, exit
  79         BL      exit
  80
  81         END