From: cuz <cuz@b7a2c559-68d2-44c3-8de9-860c34a00d81>
Date: Sat, 23 Nov 2002 11:10:50 +0000 (+0000)
Subject: Add STARTUP and LOWCODE segments
X-Git-Tag: V2.12.0~2036
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=d7d86886b6e571e55eb605ac4ba92c3970f6f8e3;p=cc65

Add STARTUP and LOWCODE segments


git-svn-id: svn://svn.cc65.org/cc65/trunk@1601 b7a2c559-68d2-44c3-8de9-860c34a00d81
---

diff --git a/libsrc/apple2/crt0.s b/libsrc/apple2/crt0.s
index a5ed0a833..b3cfb55c9 100644
--- a/libsrc/apple2/crt0.s
+++ b/libsrc/apple2/crt0.s
@@ -7,7 +7,7 @@
 	.export		_exit
 	.import	   	initlib, donelib
 	.import	   	zerobss, push0
-	.import		__CODE_LOAD__, __BSS_LOAD__	; Linker generated
+       	.import	       	__STARTUP_LOAD__, __BSS_LOAD__	; Linker generated
 	.import		_main
 
         .include        "zeropage.inc"
@@ -18,13 +18,18 @@
 
 .segment	"EXEHDR"
 
-	.word	__CODE_LOAD__			; Start address
-	.word	__BSS_LOAD__ - __CODE_LOAD__	; Size
+       	.word  	__STARTUP_LOAD__                ; Start address
+       	.word  	__BSS_LOAD__ - __STARTUP_LOAD__	; Size
 
 ; ------------------------------------------------------------------------
-; Actual code
+; Create an empty LOWCODE segment to avoid linker warnings
 
-.code
+.segment        "LOWCODE"
+
+; ------------------------------------------------------------------------
+; Place the startup code in a special segment.
+
+.segment       	"STARTUP"
 
        	ldx	#zpspace-1
 L1:	lda	sp,x
@@ -91,6 +96,8 @@ L2:	lda	zpsave,x
 
 	jmp	RESTOR
 
+; ------------------------------------------------------------------------
+; Data
 
 .data
 
diff --git a/libsrc/atmos/crt0.s b/libsrc/atmos/crt0.s
index 5955fd94b..1fae39083 100644
--- a/libsrc/atmos/crt0.s
+++ b/libsrc/atmos/crt0.s
@@ -13,35 +13,14 @@
 
 
 ; ------------------------------------------------------------------------
-; Define and export the ZP variables for the Oric runtime
+; Create an empty LOWCODE segment to avoid linker warnings
 
-	.exportzp	sp, sreg, regsave
-	.exportzp	ptr1, ptr2, ptr3, ptr4
-	.exportzp	tmp1, tmp2, tmp3, tmp4
-	.exportzp	regbank, zpspace
-
-.zeropage
-
-zpstart	= *
-sp:	      	.res   	2 	; Stack pointer
-sreg:	      	.res	2	; Secondary register/high 16 bit for longs
-regsave:      	.res	2	; slot to save/restore (E)AX into
-ptr1:	      	.res	2
-ptr2:	      	.res	2
-ptr3:	      	.res	2
-ptr4:	      	.res	2
-tmp1:	      	.res	1
-tmp2:	      	.res	1
-tmp3:	      	.res	1
-tmp4:	      	.res	1
-regbank:      	.res	6	; 6 byte register bank
-
-zpspace	= * - zpstart		; Zero page space allocated
-
-.code
+.segment        "LOWCODE"
 
 ; ------------------------------------------------------------------------
-; Actual code
+; Place the startup code in a special segment.
+
+.segment       	"STARTUP"
 
 ; Clear the BSS data
 
@@ -82,6 +61,9 @@ _exit:	jsr	donelib		; Run module destructors
 
 	rts
 
+; ------------------------------------------------------------------------
+; Data
+
 .bss
 spsave:	.res	1
 
diff --git a/src/ld65/cfg/apple2.cfg b/src/ld65/cfg/apple2.cfg
index 89ab2ef54..1248af0cb 100644
--- a/src/ld65/cfg/apple2.cfg
+++ b/src/ld65/cfg/apple2.cfg
@@ -5,7 +5,9 @@ MEMORY {
 }
 SEGMENTS {
     EXEHDR: load = HEADER, type = ro;
-    CODE: load = RAM, type = ro, define = yes;
+    STARTUP: load = RAM, type = ro, define = yes;
+    LOWCODE: load = RAM, type = ro;
+    CODE: load = RAM, type = ro;
     RODATA: load = RAM, type = ro;
     DATA: load = RAM, type = rw;
     BSS: load = RAM, type = bss, define = yes;
diff --git a/src/ld65/cfg/atmos.cfg b/src/ld65/cfg/atmos.cfg
index f16198324..48010c015 100644
--- a/src/ld65/cfg/atmos.cfg
+++ b/src/ld65/cfg/atmos.cfg
@@ -3,6 +3,8 @@ MEMORY {
     RAM: start = $0600, size = $9200, define = yes, file = %O;
 }
 SEGMENTS {
+    SATRTUP: load = RAM, type = wprot;
+    LOWCODE: load = RAM, type = wprot;
     CODE: load = RAM, type = wprot;
     RODATA: load = RAM, type = wprot;
     DATA: load = RAM, type = rw;