1
0
mirror of https://github.com/cc65/cc65.git synced 2024-12-27 15:29:46 +00:00
cc65/libsrc/geos/devel/crt0.s
uz 7ecf7a7e58 Adjust geos startup code to new compiler handling. Introduce __STARTUP__
symbol, remove geos.o.


git-svn-id: svn://svn.cc65.org/cc65/trunk@3989 b7a2c559-68d2-44c3-8de9-860c34a00d81
2009-07-31 12:46:38 +00:00

47 lines
932 B
ArmAsm

;
; Startup code for geos
;
; Maciej 'YTM/Elysium' Witkowiak
; 26.10.99, 10.3.2000, 15.8.2001, 23.12.2002
.export _exit
.export __STARTUP__ : absolute = 1 ; Mark as startup
.import __RAM_START__, __RAM_SIZE__ ; Linker generated
.import initlib, donelib
.import callmain
.import zerobss
.importzp sp
.include "../inc/jumptab.inc"
; ------------------------------------------------------------------------
; Place the startup code in a special segment.
.segment "STARTUP"
; Clear the BSS data
jsr zerobss
; Setup stack
lda #<(__RAM_START__ + __RAM_SIZE__)
sta sp
lda #>(__RAM_START__ + __RAM_SIZE__)
sta sp+1 ; Set argument stack ptr
; Call module constructors
jsr initlib
; Push arguments and call main()
cli
jsr callmain
; Call module destructors.
_exit: jsr donelib ; Run module destructors
jmp EnterDeskTop ; return control to the system