topic sdata/sbss access from asm in ColdFire/68K Microcontrollers and Processors

sdata/sbss access from asm

Boborjan — Mon, 05 Dec 2011 01:10:55 GMT

Hi,

how can I make accesses to the small data area in asm?

like:

move.w #2, _variable(A5) // although it is how compiler puts it into asm (using -S), it does not work at all from asm file

I use legacy 68k codewarrior 3.2.

ASM reference says something regarding using "label@sdax" but I could not make it work, I always get error messages.

Thanks,

Viktor

JimDon — Mon, 05 Dec 2011 02:23:24 GMT

Well, using CW 10.1 for a V1 this worked for me:

long_data: .long $beefabcd

move.l long_data@sdax(A5),D0

Boborjan — Mon, 05 Dec 2011 17:42:51 GMT

Thanks for the answer.

These lines give me the message:

File "../crt0.S" ; Line 67 # Error: Illegal or unsupported relocation type
move.l long_data@sdax(A5),D0

I guess cw for V1 does not have any options for producing CPU32 code, does it?

BR,

Viktor