----- Original Message -----
From: "Björn Haase" <[EMAIL PROTECTED]>
To: <[email protected]>
Cc: <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>;
<[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Sent: Friday, May 12, 2006 3:44 PM
Subject: [avr-libc-dev] [PATCH series] AVR: add support for new
controllerfamily to binutils, gcc and avr-libc
Hello.
> 2.) make main a normal function
>
> As discussed on the avr-libc-dev list, it is desirable that main() is just
> an ordinary function like any other. The stack pointer initialization is
> now only located in the gcrt1.S file of the avr-libc.
>
Well, 'main' function is now called using the 'CALL' instruction instead
'JMP'. But on devices which have hardware stack we permanently lose 1 stack
level from 3, that can lead error in projects for 'avr1' devices. I suggest
to use for 'avr1' devices JMP instruction for calling 'main' function.
Index: avr-libc/crt1/gcrt1.S
===================================================================
RCS file: /sources/avr-libc/avr-libc/crt1/gcrt1.S,v
retrieving revision 1.8
diff -u -r1.8 gcrt1.S
--- avr-libc/crt1/gcrt1.S 10 Nov 2005 21:12:09 -0000 1.8
+++ avr-libc/crt1/gcrt1.S 3 Jun 2006 15:41:37 -0000
@@ -196,6 +196,11 @@
#endif /* !__AVR_ASM_ONLY__ */
.section .init9,"ax",@progbits
+#ifdef __AVR_ASM_ONLY__
XJMP main
+#else
+ XCALL main
+ XJMP exit
+#endif /* __AVR_ASM_ONLY__ */
; .endfunc
PS: Björn, please, create one patch for one change. It will be easy to
understand and testing.
Anatoly.
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