the10thwiz/cc65
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Force an import of the special symbol __STARTUP__ in the C compiler when

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main() is encountered. Define this symbol in the startup code. This will
automatically force linking of the startup code which can then reside inside
the standard library as any other object file.


git-svn-id: svn://svn.cc65.org/cc65/trunk@3988 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
uz
2009-07-31 12:05:42 +00:00
parent 66391bfc25
commit 8216bf1d6a
18 changed files with 37 additions and 86 deletions
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13
libsrc/apple2/crt0.s
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@@ -1,10 +1,9 @@
;
; Startup code for cc65 (Apple2 version)
;
; This must be the *first* file on the linker command line
;
.export _exit
.export __STARTUP__ : absolute = 1 ; Mark as startup
.import zerobss
.import initlib, donelib
.import callmain, callirq
@@ -40,13 +39,13 @@
; Switch in LC bank 2 for W/O
bit $C081
bit $C081
; Set source start address
lda #<(__ZPSAVE_RUN__ + __INIT_SIZE__)
ldy #>(__ZPSAVE_RUN__ + __INIT_SIZE__)
sta $9B
sty $9C
; Set source last address
lda #<(__ZPSAVE_RUN__ + __INIT_SIZE__ + __LC_LAST__ - __LC_START__)
ldy #>(__ZPSAVE_RUN__ + __INIT_SIZE__ + __LC_LAST__ - __LC_START__)
@@ -68,7 +67,7 @@
ldy #>__ZPSAVE_RUN__
sta $9B
sty $9C
; Set source last address
lda #<(__ZPSAVE_RUN__ + __INIT_SIZE__)
ldy #>(__ZPSAVE_RUN__ + __INIT_SIZE__)
@@ -92,7 +91,7 @@
_exit: ldx #<exit
lda #>exit
jsr reset ; Setup RESET vector
; Switch in ROM in case it wasn't already switched in by a RESET
bit $C082
@@ -159,7 +158,7 @@ init: ldx #zpspace-1
ldx #<_exit
lda #>_exit
jsr reset ; Setup RESET vector
; Setup the stack
lda HIMEM
sta sp