Re: Embedded development platform

[Brian Rose <lists%brianrose.net@localhost>]

This is my (very) basic program that I am trying to write using a 
cross-compiled NetBSD toolchain. To do this i simply did the following...

$ cd /usr/src
<download and unpack sources into /usr/src>
$ ./build.sh -m m68k -t
$ cd ~
$ mkdir coldfire
$ mkdir coldfire/tools
$ cd coldfire/tools
$ cp -R /usr/src/tools/obj/tools.NetBSD-1.6.2-i386/* .
$ cd ..
$ mkdir Projects
$ mkdir Projects/EvalBoard
$ cd Projects/EvalBoard

In this folder I have the following files...

init.asm
 1)
 2)     .text
 3)     .global _start  
 4)
 5) # A Comment
 6) # .equ      TEST_CONSTANT,  0x200
 7)     .set    TEST_CONSTANT,0x200
 8) _start:
 9)
10)     move.b  TEST_CONSTANT,d0
11)

Makefile
 1) TOOLBIN=../../tools/bin
 2) ASM=$(TOOLBIN)/m68k--netbsdelf-as
 3) LINKER=$(TOOLBIN)/m68k--netbsdelf-ld
 4) OBJCOPY=$(TOOLBIN)/m68k--netbsdelf-objcopy
 5)
 6) code.o : init.o
 7)     $(LINKER) init.o -o code.o
 8)
 9) init.o : init.asm
10)     $(ASM) -m68020 -o init.o init.asm
11)
12) clean :
13)     rm init.o
14)

When I do a "make" I get the following error...

  ../../tools/bin/m68k--netbsdelf-as -o init.o init.asm
  ../../tools/bin/m68k--netbsdelf-ld init.o -o code.o
  init.o: In function `_start':
  init.o(.text+0x4): undefined reference to `d0'
  *** Error code 1

  Stop.
  make: stopped in /usr/coldfire/Projects/EvalBoard

It looks like the assembler assumes that d0 is a variable, when it should 
be data register 0. Looking at the docs for the assembler, I don't see 
anything special.

Any ideas? Thanks in advance.

--

Brian