assertion failure in coff-i386.c on .code16

[Ian Lance Taylor]

   Date: Fri, 17 Sep 1999 19:56:42 +0930 (CST)
   From: Alan Modra <alan@SPRI.Levels.UniSA.Edu.Au>

   On Fri, 17 Sep 1999, Pavel Roskin wrote:

   > While configuring GNU GRUB I have noticed that "as" cannot compile the
   > following file:
   > 
   > 	.code16
   > l1:	addr32
   > 	movb	%al, l1
   > 
   > D:\home\proski\src\bfd>as test.s
   > test.s: Assembler messages:
   > test.s:2: Warning: stand-alone `addr32' prefix
   > as: bfd assertion fail coff-i386.c:498
   > test.s:3: Error: Cannot represent relocation type BFD_RELOC_16

   .code16 on ix86 works properly only for elf at the moment.  It looks
   fairly easy to fix for coff though, but I'm not sure whether we need to
   add R_DIR16 support, and use that for the BFD_RELOC_16 case, or whether we
   should use R_RELWORD.  To round out support, I suppose we need
   to add R_DIR8 (type 0??) or use R_RELBYTE.  I'm no coff expert.  Ian?

I think using R_RELWORD and R_RELBYTE should work fine.  I have no
idea why the i386 COFF backend supports both R_DIR32 and R_RELLONG.

Ian