keil linker 옵션 entry

항상 만만한(?) qs-rgb 예제에서

Linker를 보다 보니... scatter 아래 Misc Control의

--entry Reset_Handler

가 보인다...?

startup_rvmdk.S에

해당 함수가 그럼 entry 포인트로 잡히고

얘는 적절한 초기화 이후 __main 을 호출하게 된다.

;****************************************************************************** ; ; This is the code that gets called when the processor first starts execution ; following a reset event. ; ;******************************************************************************         EXPORT  Reset_Handler Reset_Handler         ;         ; Enable the floating-point unit.  This must be done here to handle the         ; case where main() uses floating-point and the function prologue saves         ; floating-point registers (which will fault if floating-point is not         ; enabled).  Any configuration of the floating-point unit using         ; DriverLib APIs must be done here prior to the floating-point unit         ; being enabled.         ;         ; Note that this does not use DriverLib since it might not be included         ; in this project.         ;         MOVW    R0, #0xED88         MOVT    R0, #0xE000         LDR     R1, [R0]         ORR     R1, #0x00F00000         STR     R1, [R0]         ;         ; Call the C library enty point that handles startup.  This will copy         ; the .data section initializers from flash to SRAM and zero fill the         ; .bss section.         ;         IMPORT  __main         B       __main

그럼.. main()이 __main 으로 맹글링 되는건가?

[링크 : https://en.wikipedia.org/wiki/Name_mangling]

[링크 : http://spikez.tistory.com/19]

[링크 : http://infocenter.arm.com/help/topic/com.arm.doc.dui0205d/RVCT_Compiler_and_Libraries_D.pdf]