gas fixes for x86 elf/coff emulations

[Robert Lipe]

As promised, here's the additional work in config/tc-i386.c.

I have now built binutils with gcc and the assembler with yesterday's
patches plus this work.  Problems remain with debugging (-gstabs aborts
in COFF, COFF debugging gets tripped up by certain files) but in loose
generalities, things work.      Things seem to work quite well in ELF.

I don't know at this time how much of the problems I'm seeing are
artifacts of of the questionable (?) --iwth-bfd-assembler version
of the COFF stuff.

Whitespace may need to be adjusted.

RJL


Wed Jan  8 23:28:34 CST 1997 Robert Lipe <robertl@dgii.com>
	* config/tc-i386.c:  Several changes to allow emulations
	to work for x86 ELF and COFF.


*** gas.orig/config/tc-i386.c	Tue Dec 17 03:05:30 1996
--- gas/config/tc-i386.c	Wed Jan  8 23:08:22 1997
***************
*** 104,110 ****
  
  /* This array holds the chars that always start a comment.  If the
     pre-processor is disabled, these aren't very useful */
! #if defined (TE_I386AIX) || defined (OBJ_ELF)
  const char comment_chars[] = "#/";
  #else
  const char comment_chars[] = "#";
--- 104,110 ----
  
  /* This array holds the chars that always start a comment.  If the
     pre-processor is disabled, these aren't very useful */
! #if defined (TE_I386AIX) || defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
  const char comment_chars[] = "#/";
  #else
  const char comment_chars[] = "#";
***************
*** 118,124 ****
     #NO_APP at the beginning of its output. */
  /* Also note that comments started like this one will always work if
     '/' isn't otherwise defined.  */
! #if defined (TE_I386AIX) || defined (OBJ_ELF)
  const char line_comment_chars[] = "";
  #else
  const char line_comment_chars[] = "/";
--- 118,124 ----
     #NO_APP at the beginning of its output. */
  /* Also note that comments started like this one will always work if
     '/' isn't otherwise defined.  */
! #if defined (TE_I386AIX) || defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
  const char line_comment_chars[] = "";
  #else
  const char line_comment_chars[] = "/";
***************
*** 555,564 ****
        operand_chars[(unsigned char) *p] = *p;
    }
  
! #ifdef OBJ_ELF
    record_alignment (text_section, 2);
    record_alignment (data_section, 2);
    record_alignment (bss_section, 2);
  #endif
  }
  
--- 555,566 ----
        operand_chars[(unsigned char) *p] = *p;
    }
  
! #if defined  (OBJ_ELF) ||  defined (OBJ_MAYBE_ELF)
!   if (OUTPUT_FLAVOR == bfd_target_elf_flavour) {
    record_alignment (text_section, 2);
    record_alignment (data_section, 2);
    record_alignment (bss_section, 2);
+   }
  #endif
  }
  
***************
*** 2631,2640 ****
    if (fixP->fx_r_type == BFD_RELOC_32_PCREL && fixP->fx_addsy)
      {
  #ifndef OBJ_AOUT
        value += fixP->fx_where + fixP->fx_frag->fr_address;
  #endif
! #ifdef OBJ_ELF
!       if (S_GET_SEGMENT (fixP->fx_addsy) == seg
  	  || (fixP->fx_addsy->bsym->flags & BSF_SECTION_SYM) != 0)
  	{
  	  /* Yes, we add the values in twice.  This is because
--- 2633,2644 ----
    if (fixP->fx_r_type == BFD_RELOC_32_PCREL && fixP->fx_addsy)
      {
  #ifndef OBJ_AOUT
+       if (OUTPUT_FLAVOR == bfd_target_elf_flavour) 
        value += fixP->fx_where + fixP->fx_frag->fr_address;
  #endif
! #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
!       if (OUTPUT_FLAVOR == bfd_target_elf_flavour) 
!       if (S_GET_SEGMENT (fixP->fx_addsy) == seg 
  	  || (fixP->fx_addsy->bsym->flags & BSF_SECTION_SYM) != 0)
  	{
  	  /* Yes, we add the values in twice.  This is because
***************
*** 2648,2655 ****
  
    /* Fix a few things - the dynamic linker expects certain values here,
       and we must not dissappoint it. */
! #ifdef OBJ_ELF
!   if (fixP->fx_addsy)
      switch(fixP->fx_r_type) {
      case BFD_RELOC_386_PLT32:
        /* Make the jump instruction point to the address of the operand.  At
--- 2652,2660 ----
  
    /* Fix a few things - the dynamic linker expects certain values here,
       and we must not dissappoint it. */
! #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
!   if ( (OUTPUT_FLAVOR == bfd_target_elf_flavour)  && 
! 	fixP->fx_addsy)
      switch(fixP->fx_r_type) {
      case BFD_RELOC_386_PLT32:
        /* Make the jump instruction point to the address of the operand.  At
***************
*** 2838,2856 ****
        flag_do_long_jump = 1;
        break;
  
! #ifdef OBJ_ELF
        /* -k: Ignore for FreeBSD compatibility.  */
      case 'k':
        break;
  
        /* -V: SVR4 argument to print version ID.  */
      case 'V':
!       print_version_id ();
        break;
  
        /* -Qy, -Qn: SVR4 arguments controlling whether a .comment section
  	 should be emitted or not.  FIXME: Not implemented.  */
      case 'Q':
        break;
  #endif
  
--- 2843,2866 ----
        flag_do_long_jump = 1;
        break;
  
! #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
        /* -k: Ignore for FreeBSD compatibility.  */
      case 'k':
+   	if (OUTPUT_FLAVOR == bfd_target_elf_flavour) return 1 ;
        break;
  
        /* -V: SVR4 argument to print version ID.  */
      case 'V':
!   	if (OUTPUT_FLAVOR == bfd_target_elf_flavour) 
! 	      print_version_id ();
! 	else
! 		return 0 ;
        break;
  
        /* -Qy, -Qn: SVR4 arguments controlling whether a .comment section
  	 should be emitted or not.  FIXME: Not implemented.  */
      case 'Q':
+   	if (OUTPUT_FLAVOR == bfd_target_elf_flavour)  return 1 ;
        break;
  #endif
  
***************
*** 3003,3008 ****
--- 3013,3031 ----
    return rel;
  }
  
+ const char *
+ i386_target_format()
+ {
+ 	switch (OUTPUT_FLAVOR) {
+ 		case bfd_target_coff_flavour: 
+ 			return "coff-i386" ;
+ 		case bfd_target_elf_flavour:
+ 			return "elf32-i386" ;
+ 		default: 
+ 			abort() ;
+ 	}
+ }
+ 
  #else /* ! BFD_ASSEMBLER */
  
  #if (defined(OBJ_AOUT) | defined(OBJ_BOUT))