Re: [ECOS] Macro problems in arm-elf-as

[Ian Lance Taylor <ian@zembu.com>]

   Date: Tue, 15 Jun 1999 13:25:38 +0200
   From: Dan Hovang <dh@ctechnologies.se>

   It seems like the arm-elf-as macro routines are broken. Following
   code works in cygwin32 as aswell as in binutils-2.9.1 compiled under
   RedHat Linux 6.0, but not in arm-elf-as as in ecosSWtools-arm-990321.

	   .macro test, t1, t2
	   .int \t1
   label\@:
	   .int \t2
	   .endm

	   test 1, 2
	   test 3, 4
	   test 5, 6

   bash-2.02$ arm-elf-as test.S -o test
   test.S: Assembler messages:
   test.S:8: Error: bad instruction `label\'
   test.S:9: Error: bad instruction `label\'
   test.S:10: Error: bad instruction `label\'

   I've browsed some sources in the ecosSWtools and compared them against
   binutils (read.c and macro.c) but I've not been able to locate the
   problem. Any ideas, anyone?

The problem is that `@' is the comment character for ARM assembly
code.  That takes precedence over the special meaning of `\@' in a
macro.  The third line in your test case is being seen as just
`label\'.  The `@' and everything following it are being treated as a
comment.

I unfortunately don't have any clever suggestions.

Ian