Lee Kai Xuan / mbed-os

mbed-os

Fork of mbed-os by erkin yucel

cmsis/TOOLCHAIN_IAR/cmain.S@0:f269e3021894, 2016-10-23 (annotated)

Committer:
elessair
Date:
Sun Oct 23 15:10:02 2016 +0000
Revision:
0:f269e3021894
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
elessair 0:f269e3021894 1 /**************************************************
elessair 0:f269e3021894 2 *
elessair 0:f269e3021894 3 * Part two of the system initialization code, contains C-level
elessair 0:f269e3021894 4 * initialization, thumb-2 only variant.
elessair 0:f269e3021894 5 *
elessair 0:f269e3021894 6 * Copyright 2006 IAR Systems. All rights reserved.
elessair 0:f269e3021894 7 *
elessair 0:f269e3021894 8 * $Revision: 59783 $
elessair 0:f269e3021894 9 *
elessair 0:f269e3021894 10 **************************************************/
elessair 0:f269e3021894 11
elessair 0:f269e3021894 12
elessair 0:f269e3021894 13 ; --------------------------------------------------
elessair 0:f269e3021894 14 ; Module ?cmain, C-level initialization.
elessair 0:f269e3021894 15 ;
elessair 0:f269e3021894 16
elessair 0:f269e3021894 17
elessair 0:f269e3021894 18 SECTION SHT$$PREINIT_ARRAY:CONST:NOROOT(2)
elessair 0:f269e3021894 19 SECTION SHT$$INIT_ARRAY:CONST:NOROOT(2)
elessair 0:f269e3021894 20
elessair 0:f269e3021894 21 SECTION .text:CODE:NOROOT(2)
elessair 0:f269e3021894 22
elessair 0:f269e3021894 23 PUBLIC __cmain
elessair 0:f269e3021894 24 ;; Keep ?main for legacy reasons, it is accessed in countless instances of cstartup.s around the world...
elessair 0:f269e3021894 25 PUBLIC ?main
elessair 0:f269e3021894 26 EXTWEAK __iar_data_init3
elessair 0:f269e3021894 27 EXTWEAK __iar_argc_argv
elessair 0:f269e3021894 28 EXTERN __low_level_init
elessair 0:f269e3021894 29 EXTERN __call_ctors
elessair 0:f269e3021894 30 EXTERN main
elessair 0:f269e3021894 31 EXTERN exit
elessair 0:f269e3021894 32 EXTERN __iar_dynamic_initialization
elessair 0:f269e3021894 33 EXTERN mbed_sdk_init
elessair 0:f269e3021894 34 EXTERN SystemInit
elessair 0:f269e3021894 35
elessair 0:f269e3021894 36 THUMB
elessair 0:f269e3021894 37 __cmain:
elessair 0:f269e3021894 38 ?main:
elessair 0:f269e3021894 39
elessair 0:f269e3021894 40 ; Initialize segments.
elessair 0:f269e3021894 41 ; __segment_init and __low_level_init are assumed to use the same
elessair 0:f269e3021894 42 ; instruction set and to be reachable by BL from the ICODE segment
elessair 0:f269e3021894 43 ; (it is safest to link them in segment ICODE).
elessair 0:f269e3021894 44
elessair 0:f269e3021894 45 FUNCALL __cmain, __low_level_init
elessair 0:f269e3021894 46 bl __low_level_init
elessair 0:f269e3021894 47 cmp r0,#0
elessair 0:f269e3021894 48 beq ?l1
elessair 0:f269e3021894 49 FUNCALL __cmain, __iar_data_init3
elessair 0:f269e3021894 50 bl __iar_data_init3
elessair 0:f269e3021894 51 MOVS r0,#0 ; No parameters
elessair 0:f269e3021894 52 FUNCALL __cmain, mbed_sdk_init
elessair 0:f269e3021894 53 BL mbed_sdk_init
elessair 0:f269e3021894 54 MOVS r0,#0 ; No parameters
elessair 0:f269e3021894 55 FUNCALL __cmain, __iar_dynamic_initialization
elessair 0:f269e3021894 56 BL __iar_dynamic_initialization ; C++ dynamic initialization
elessair 0:f269e3021894 57
elessair 0:f269e3021894 58 ?l1:
elessair 0:f269e3021894 59 REQUIRE ?l3
elessair 0:f269e3021894 60
elessair 0:f269e3021894 61 SECTION .text:CODE:NOROOT(2)
elessair 0:f269e3021894 62
elessair 0:f269e3021894 63 PUBLIC _main
elessair 0:f269e3021894 64 PUBLIC _call_main
elessair 0:f269e3021894 65 THUMB
elessair 0:f269e3021894 66
elessair 0:f269e3021894 67 __iar_init$$done: ; Copy initialization is done
elessair 0:f269e3021894 68
elessair 0:f269e3021894 69 ?l3:
elessair 0:f269e3021894 70 _call_main:
elessair 0:f269e3021894 71 MOVS r0,#0 ; No parameters
elessair 0:f269e3021894 72 FUNCALL __cmain, __iar_argc_argv
elessair 0:f269e3021894 73 BL __iar_argc_argv ; Maybe setup command line
elessair 0:f269e3021894 74
elessair 0:f269e3021894 75 FUNCALL __cmain, main
elessair 0:f269e3021894 76 BL main
elessair 0:f269e3021894 77 _main:
elessair 0:f269e3021894 78 FUNCALL __cmain, exit
elessair 0:f269e3021894 79 BL exit
elessair 0:f269e3021894 80
elessair 0:f269e3021894 81 END