[binutils.git] / bfd / coff-i386.c

/* BFD back-end for Intel 386 COFF files.
   Copyright 1990, 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
   Written by Cygnus Support.

This file is part of BFD, the Binary File Descriptor library.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */

#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
#include "obstack.h"

#include "coff/i386.h"

#include "coff/internal.h"

#ifdef COFF_WITH_PE
#include "coff/pe.h"
#endif

#include "libcoff.h"

static bfd_reloc_status_type coff_i386_reloc 
  PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
static reloc_howto_type *coff_i386_rtype_to_howto
  PARAMS ((bfd *, asection *, struct internal_reloc *,
	   struct coff_link_hash_entry *, struct internal_syment *,

	   bfd_vma *));

#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2)
/* The page size is a guess based on ELF.  */
#define COFF_PAGE_SIZE 0x1000

/* For some reason when using i386 COFF the value stored in the .text
   section for a reference to a common symbol is the value itself plus
   any desired offset.  Ian Taylor, Cygnus Support.  */

/* If we are producing relocateable output, we need to do some
   adjustments to the object file that are not done by the
   bfd_perform_relocation function.  This function is called by every
   reloc type to make any required adjustments.  */

static bfd_reloc_status_type
coff_i386_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd,
		 error_message)
     bfd *abfd;
     arelent *reloc_entry;
     asymbol *symbol;
     PTR data;
     asection *input_section;
     bfd *output_bfd;
     char **error_message;
{
  symvalue diff;

  if (output_bfd == (bfd *) NULL)
    return bfd_reloc_continue;

  if (bfd_is_com_section (symbol->section))
    {
      /* We are relocating a common symbol.  The current value in the
	 object file is ORIG + OFFSET, where ORIG is the value of the
	 common symbol as seen by the object file when it was compiled
	 (this may be zero if the symbol was undefined) and OFFSET is
	 the offset into the common symbol (normally zero, but may be
	 non-zero when referring to a field in a common structure).
	 ORIG is the negative of reloc_entry->addend, which is set by
	 the CALC_ADDEND macro below.  We want to replace the value in
	 the object file with NEW + OFFSET, where NEW is the value of
	 the common symbol which we are going to put in the final
	 object file.  NEW is symbol->value.  */
      diff = symbol->value + reloc_entry->addend;
    }
  else
    {
      /* For some reason bfd_perform_relocation always effectively
	 ignores the addend for a COFF target when producing
	 relocateable output.  This seems to be always wrong for 386
	 COFF, so we handle the addend here instead.  */
      diff = reloc_entry->addend;
    }

#define DOIT(x) \
  x = ((x & ~howto->dst_mask) | (((x & howto->src_mask) + diff) & howto->dst_mask))

  if (diff != 0)
    {
      reloc_howto_type *howto = reloc_entry->howto;
      unsigned char *addr = (unsigned char *) data + reloc_entry->address;

      switch (howto->size)
	{
	case 0:
	  {
	    char x = bfd_get_8 (abfd, addr);
	    DOIT (x);
	    bfd_put_8 (abfd, x, addr);
	  }
	  break;

	case 1:
	  {
	    short x = bfd_get_16 (abfd, addr);
	    DOIT (x);
	    bfd_put_16 (abfd, x, addr);
	  }
	  break;

	case 2:
	  {
	    long x = bfd_get_32 (abfd, addr);
	    DOIT (x);
	    bfd_put_32 (abfd, x, addr);
	  }
	  break;

	default:
	  abort ();
	}
    }

  /* Now let bfd_perform_relocation finish everything up.  */
  return bfd_reloc_continue;
}


#ifndef PCRELOFFSET
#define PCRELOFFSET false
#endif

static reloc_howto_type howto_table[] = 
{
  {0},
  {1},
  {2},
  {3},
  {4},
  {5},
  HOWTO (R_DIR32,               /* type */                                 
	 0,	                /* rightshift */                           
	 2,	                /* size (0 = byte, 1 = short, 2 = long) */ 
	 32,	                /* bitsize */                   
	 false,	                /* pc_relative */                          
	 0,	                /* bitpos */                               
	 complain_overflow_bitfield, /* complain_on_overflow */
	 coff_i386_reloc,       /* special_function */                     
	 "dir32",               /* name */                                 
	 true,	                /* partial_inplace */                      
	 0xffffffff,            /* src_mask */                             
	 0xffffffff,            /* dst_mask */                             
	 true),                /* pcrel_offset */
  /* {7}, */
  HOWTO (7,               /* type */                                 
	 0,	                /* rightshift */                           
	 2,	                /* size (0 = byte, 1 = short, 2 = long) */ 
	 32,	                /* bitsize */                   
	 false,	                /* pc_relative */                          
	 0,	                /* bitpos */                               
	 complain_overflow_bitfield, /* complain_on_overflow */
	 coff_i386_reloc,       /* special_function */                     
	 "dir32",               /* name */                                 
	 true,	                /* partial_inplace */                      
	 0xffffffff,            /* src_mask */                             
	 0xffffffff,            /* dst_mask */                             
	 false),                /* pcrel_offset */
  {010},
  {011},
  {012},
  {013},
  {014},
  {015},
  {016},
  HOWTO (R_RELBYTE,		/* type */                                 
	 0,			/* rightshift */                           
	 0,			/* size (0 = byte, 1 = short, 2 = long) */ 
	 8,			/* bitsize */                   
	 false,			/* pc_relative */                          
	 0,			/* bitpos */                               
	 complain_overflow_bitfield, /* complain_on_overflow */
	 coff_i386_reloc,	/* special_function */                     
	 "8",			/* name */                                 
	 true,			/* partial_inplace */                      
	 0x000000ff,		/* src_mask */                             
	 0x000000ff,		/* dst_mask */                             
	 PCRELOFFSET),		/* pcrel_offset */
  HOWTO (R_RELWORD,		/* type */                                 
	 0,			/* rightshift */                           
	 1,			/* size (0 = byte, 1 = short, 2 = long) */ 
	 16,			/* bitsize */                   
	 false,			/* pc_relative */                          
	 0,			/* bitpos */                               
	 complain_overflow_bitfield, /* complain_on_overflow */
	 coff_i386_reloc,	/* special_function */                     
	 "16",			/* name */                                 
	 true,			/* partial_inplace */                      
	 0x0000ffff,		/* src_mask */                             
	 0x0000ffff,		/* dst_mask */                             
	 PCRELOFFSET),		/* pcrel_offset */
  HOWTO (R_RELLONG,		/* type */                                 
	 0,			/* rightshift */                           
	 2,			/* size (0 = byte, 1 = short, 2 = long) */ 
	 32,			/* bitsize */                   
	 false,			/* pc_relative */                          
	 0,			/* bitpos */                               
	 complain_overflow_bitfield, /* complain_on_overflow */
	 coff_i386_reloc,	/* special_function */                     
	 "32",			/* name */                                 
	 true,			/* partial_inplace */                      
	 0xffffffff,		/* src_mask */                             
	 0xffffffff,		/* dst_mask */                             
	 PCRELOFFSET),		/* pcrel_offset */
  HOWTO (R_PCRBYTE,		/* type */                                 
	 0,			/* rightshift */                           
	 0,			/* size (0 = byte, 1 = short, 2 = long) */ 
	 8,			/* bitsize */                   
	 true,			/* pc_relative */                          
	 0,			/* bitpos */                               
	 complain_overflow_signed, /* complain_on_overflow */
	 coff_i386_reloc,	/* special_function */                     
	 "DISP8",		/* name */                                 
	 true,			/* partial_inplace */                      
	 0x000000ff,		/* src_mask */                             
	 0x000000ff,		/* dst_mask */                             
	 PCRELOFFSET),		/* pcrel_offset */
  HOWTO (R_PCRWORD,		/* type */                                 
	 0,			/* rightshift */                           
	 1,			/* size (0 = byte, 1 = short, 2 = long) */ 
	 16,			/* bitsize */                   
	 true,			/* pc_relative */                          
	 0,			/* bitpos */                               
	 complain_overflow_signed, /* complain_on_overflow */
	 coff_i386_reloc,	/* special_function */                     
	 "DISP16",		/* name */                                 
	 true,			/* partial_inplace */                      
	 0x0000ffff,		/* src_mask */                             
	 0x0000ffff,		/* dst_mask */                             
	 PCRELOFFSET),		/* pcrel_offset */
  HOWTO (R_PCRLONG,		/* type */                                 
	 0,			/* rightshift */                           
	 2,			/* size (0 = byte, 1 = short, 2 = long) */ 
	 32,			/* bitsize */                   
	 true,			/* pc_relative */                          
	 0,			/* bitpos */                               
	 complain_overflow_signed, /* complain_on_overflow */
	 coff_i386_reloc,	/* special_function */                     
	 "DISP32",		/* name */                                 
	 true,			/* partial_inplace */                      
	 0xffffffff,		/* src_mask */                             
	 0xffffffff,		/* dst_mask */                             
	 PCRELOFFSET)		/* pcrel_offset */
};

/* Turn a howto into a reloc  nunmber */

#define SELECT_RELOC(x,howto) { x.r_type = howto->type; }
#define BADMAG(x) I386BADMAG(x)
#define I386 1			/* Customize coffcode.h */

#define RTYPE2HOWTO(cache_ptr, dst) \
	    (cache_ptr)->howto = howto_table + (dst)->r_type;

/* On SCO Unix 3.2.2 the native assembler generates two .data
   sections.  We handle that by renaming the second one to .data2.  It
   does no harm to do this for any 386 COFF target.  */
#define TWO_DATA_SECS

/* For 386 COFF a STYP_NOLOAD | STYP_BSS section is part of a shared
   library.  On some other COFF targets STYP_BSS is normally
   STYP_NOLOAD.  */
#define BSS_NOLOAD_IS_SHARED_LIBRARY

/* Compute the addend of a reloc.  If the reloc is to a common symbol,
   the object file contains the value of the common symbol.  By the
   time this is called, the linker may be using a different symbol
   from a different object file with a different value.  Therefore, we
   hack wildly to locate the original symbol from this file so that we
   can make the correct adjustment.  This macro sets coffsym to the
   symbol from the original file, and uses it to set the addend value
   correctly.  If this is not a common symbol, the usual addend
   calculation is done, except that an additional tweak is needed for
   PC relative relocs.
   FIXME: This macro refers to symbols and asect; these are from the
   calling function, not the macro arguments.  */

#define CALC_ADDEND(abfd, ptr, reloc, cache_ptr)		\
  {								\
    coff_symbol_type *coffsym = (coff_symbol_type *) NULL;	\
    if (ptr && bfd_asymbol_bfd (ptr) != abfd)			\
      coffsym = (obj_symbols (abfd)				\
	         + (cache_ptr->sym_ptr_ptr - symbols));		\
    else if (ptr)						\
      coffsym = coff_symbol_from (abfd, ptr);			\
    if (coffsym != (coff_symbol_type *) NULL			\
	&& coffsym->native->u.syment.n_scnum == 0)		\
      cache_ptr->addend = - coffsym->native->u.syment.n_value;	\
    else if (ptr && bfd_asymbol_bfd (ptr) == abfd		\
	     && ptr->section != (asection *) NULL)		\
      cache_ptr->addend = - (ptr->section->vma + ptr->value);	\
    else							\
      cache_ptr->addend = 0;					\
    if (ptr && howto_table[reloc.r_type].pc_relative)		\
      cache_ptr->addend += asect->vma;				\
  }

/* We use the special COFF backend linker.  */
#define coff_relocate_section _bfd_coff_generic_relocate_section

static reloc_howto_type *
coff_i386_rtype_to_howto (abfd, sec, rel, h, sym, addendp)
     bfd *abfd;
     asection *sec;
     struct internal_reloc *rel;
     struct coff_link_hash_entry *h;
     struct internal_syment *sym;
     bfd_vma *addendp;
{

  reloc_howto_type *howto;

  howto = howto_table + rel->r_type;

#ifdef COFF_WITH_PE
  *addendp = 0;
#endif

  if (howto->pc_relative)
    *addendp += sec->vma;

  if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0)
    {
      /* This is a common symbol.  The section contents include the
	 size (sym->n_value) as an addend.  The relocate_section
	 function will be adding in the final value of the symbol.  We
	 need to subtract out the current size in order to get the
	 correct result.  */
 
      BFD_ASSERT (h != NULL);


#ifndef COFF_WITH_PE
 /* I think we *do* want to bypass this.  If we don't, I have seen some data
    parameters get the wrong relcation address.  If I link two versions
    with and without this section bypassed and then do a binary comparison,
    the addresses which are different can be looked up in the map.  The 
    case in which this section has been bypassed has addresses which correspond
    to values I can find in the map */
      *addendp -= sym->n_value;
#endif
    }

  /* If the output symbol is common (in which case this must be a
     relocateable link), we need to add in the final size of the
     common symbol.  */
  if (h != NULL && h->root.type == bfd_link_hash_common) 
    *addendp += h->root.u.c.size;


#ifdef COFF_WITH_PE
  if (howto->pc_relative)
  *addendp -= 4;
#endif

  return howto;
}

#define coff_rtype_to_howto coff_i386_rtype_to_howto

#include "coffcode.h"

static const bfd_target *
i3coff_object_p(a)
     bfd *a;
{
  return coff_object_p(a);
}

const bfd_target
#ifdef TARGET_SYM
  TARGET_SYM =
#else
  i386coff_vec =
#endif
{
#ifdef TARGET_NAME
  TARGET_NAME,
#else
  "coff-i386",			/* name */
#endif
  bfd_target_coff_flavour,
  false,			/* data byte order is little */
  false,			/* header byte order is little */

  (HAS_RELOC | EXEC_P |		/* object flags */
   HAS_LINENO | HAS_DEBUG |
   HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),

  (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
#ifdef TARGET_UNDERSCORE
  TARGET_UNDERSCORE,		/* leading underscore */
#else
  0,				/* leading underscore */
#endif
  '/',				/* ar_pad_char */
  15,				/* ar_max_namelen */

  2,				/* minimum alignment power */
  bfd_getl64, bfd_getl_signed_64, bfd_putl64,
     bfd_getl32, bfd_getl_signed_32, bfd_putl32,
     bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
  bfd_getl64, bfd_getl_signed_64, bfd_putl64,
     bfd_getl32, bfd_getl_signed_32, bfd_putl32,
     bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */

/* Note that we allow an object file to be treated as a core file as well. */
    {_bfd_dummy_target, i3coff_object_p, /* bfd_check_format */
       bfd_generic_archive_p, i3coff_object_p},
    {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */
       bfd_false},
    {bfd_false, coff_write_object_contents, /* bfd_write_contents */
       _bfd_write_archive_contents, bfd_false},

     BFD_JUMP_TABLE_GENERIC (coff),
     BFD_JUMP_TABLE_COPY (coff),
     BFD_JUMP_TABLE_CORE (_bfd_nocore),
     BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
     BFD_JUMP_TABLE_SYMBOLS (coff),
     BFD_JUMP_TABLE_RELOCS (coff),
     BFD_JUMP_TABLE_WRITE (coff),
     BFD_JUMP_TABLE_LINK (coff),
     BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),

  COFF_SWAP_TABLE,
};
Commit	Line	Data
6a469027	1	/* BFD back-end for Intel 386 COFF files.
89665c85	2	Copyright 1990, 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
6a469027	3	Written by Cygnus Support.
517496c5	4
6a469027	5	This file is part of BFD, the Binary File Descriptor library.
517496c5	6
6a469027	7	This program is free software; you can redistribute it and/or modify
517496c5	8	it under the terms of the GNU General Public License as published by
6a469027 JG	9	the Free Software Foundation; either version 2 of the License, or
6a469027 JG	10	(at your option) any later version.
517496c5	11
6a469027	12	This program is distributed in the hope that it will be useful,
517496c5 SC	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16
	17	You should have received a copy of the GNU General Public License
6a469027 JG	18	along with this program; if not, write to the Free Software
6a469027 JG	19	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
517496c5	20
517496c5	21	#include "bfd.h"
3b4f1a5d	22	#include "sysdep.h"
517496c5 SC	23	#include "libbfd.h"
517496c5 SC	24	#include "obstack.h"
89665c85	25
294eaca4	26	#include "coff/i386.h"
89665c85	27
294eaca4	28	#include "coff/internal.h"
89665c85 SC	29
	30	#ifdef COFF_WITH_PE
	31	#include "coff/pe.h"
	32	#endif
	33
517496c5 SC	34	#include "libcoff.h"
517496c5 SC	35
82b1edf7 KR	36	static bfd_reloc_status_type coff_i386_reloc
82b1edf7 KR	37	PARAMS ((bfd , arelent , asymbol , PTR, asection , bfd , char *));
89665c85	38	static reloc_howto_type *coff_i386_rtype_to_howto
82b1edf7 KR	39	PARAMS ((bfd , asection , struct internal_reloc *,
82b1edf7 KR	40	struct coff_link_hash_entry , struct internal_syment ,
89665c85	41
82b1edf7 KR	42	bfd_vma *));
	43
	44	#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2)
82b1edf7 KR	45	/* The page size is a guess based on ELF. */
82b1edf7 KR	46	#define COFF_PAGE_SIZE 0x1000
48ee0757 SS	47
	48	/* For some reason when using i386 COFF the value stored in the .text
	49	section for a reference to a common symbol is the value itself plus
	50	any desired offset. Ian Taylor, Cygnus Support. */
	51
	52	/* If we are producing relocateable output, we need to do some
	53	adjustments to the object file that are not done by the
	54	bfd_perform_relocation function. This function is called by every
	55	reloc type to make any required adjustments. */
	56
	57	static bfd_reloc_status_type
6812b607 ILT	58	coff_i386_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd,
6812b607 ILT	59	error_message)
48ee0757 SS	60	bfd *abfd;
	61	arelent *reloc_entry;
	62	asymbol *symbol;
	63	PTR data;
	64	asection *input_section;
	65	bfd *output_bfd;
6812b607	66	char **error_message;
48ee0757 SS	67	{
	68	symvalue diff;
	69
	70	if (output_bfd == (bfd *) NULL)
	71	return bfd_reloc_continue;
	72
	73	if (bfd_is_com_section (symbol->section))
	74	{
	75	/* We are relocating a common symbol. The current value in the
	76	object file is ORIG + OFFSET, where ORIG is the value of the
	77	common symbol as seen by the object file when it was compiled
	78	(this may be zero if the symbol was undefined) and OFFSET is
	79	the offset into the common symbol (normally zero, but may be
	80	non-zero when referring to a field in a common structure).
	81	ORIG is the negative of reloc_entry->addend, which is set by
	82	the CALC_ADDEND macro below. We want to replace the value in
	83	the object file with NEW + OFFSET, where NEW is the value of
	84	the common symbol which we are going to put in the final
	85	object file. NEW is symbol->value. */
	86	diff = symbol->value + reloc_entry->addend;
	87	}
	88	else
	89	{
	90	/* For some reason bfd_perform_relocation always effectively
	91	ignores the addend for a COFF target when producing
	92	relocateable output. This seems to be always wrong for 386
	93	COFF, so we handle the addend here instead. */
	94	diff = reloc_entry->addend;
	95	}
	96
	97	#define DOIT(x) \
	98	x = ((x & ~howto->dst_mask) \| (((x & howto->src_mask) + diff) & howto->dst_mask))
	99
	100	if (diff != 0)
	101	{
82b1edf7	102	reloc_howto_type *howto = reloc_entry->howto;
48ee0757 SS	103	unsigned char addr = (unsigned char ) data + reloc_entry->address;
	104
	105	switch (howto->size)
	106	{
	107	case 0:
	108	{
	109	char x = bfd_get_8 (abfd, addr);
	110	DOIT (x);
	111	bfd_put_8 (abfd, x, addr);
	112	}
	113	break;
	114
	115	case 1:
	116	{
	117	short x = bfd_get_16 (abfd, addr);
	118	DOIT (x);
	119	bfd_put_16 (abfd, x, addr);
	120	}
	121	break;
	122
	123	case 2:
	124	{
	125	long x = bfd_get_32 (abfd, addr);
	126	DOIT (x);
	127	bfd_put_32 (abfd, x, addr);
	128	}
	129	break;
	130
	131	default:
	132	abort ();
	133	}
	134	}
	135
	136	/* Now let bfd_perform_relocation finish everything up. */
	137	return bfd_reloc_continue;
	138	}
517496c5	139
89665c85 SC	140
	141
	142	#ifndef PCRELOFFSET
	143	#define PCRELOFFSET false
	144	#endif
	145
517496c5 SC	146	static reloc_howto_type howto_table[] =
517496c5 SC	147	{
48ee0757 SS	148	{0},
	149	{1},
	150	{2},
	151	{3},
	152	{4},
	153	{5},
	154	HOWTO (R_DIR32, /* type */
89665c85 SC	155	0, /* rightshift */
	156	2, /* size (0 = byte, 1 = short, 2 = long) */
	157	32, /* bitsize */
	158	false, /* pc_relative */
	159	0, /* bitpos */
	160	complain_overflow_bitfield, /* complain_on_overflow */
	161	coff_i386_reloc, /* special_function */
	162	"dir32", /* name */
	163	true, /* partial_inplace */
	164	0xffffffff, /* src_mask */
	165	0xffffffff, /* dst_mask */
	166	true), /* pcrel_offset */
	167	/* {7}, */
	168	HOWTO (7, /* type */
48ee0757 SS	169	0, /* rightshift */
	170	2, /* size (0 = byte, 1 = short, 2 = long) */
	171	32, /* bitsize */
	172	false, /* pc_relative */
	173	0, /* bitpos */
	174	complain_overflow_bitfield, /* complain_on_overflow */
	175	coff_i386_reloc, /* special_function */
	176	"dir32", /* name */
	177	true, /* partial_inplace */
	178	0xffffffff, /* src_mask */
	179	0xffffffff, /* dst_mask */
	180	false), /* pcrel_offset */
48ee0757 SS	181	{010},
	182	{011},
	183	{012},
	184	{013},
	185	{014},
	186	{015},
	187	{016},
	188	HOWTO (R_RELBYTE, /* type */
	189	0, /* rightshift */
	190	0, /* size (0 = byte, 1 = short, 2 = long) */
	191	8, /* bitsize */
	192	false, /* pc_relative */
	193	0, /* bitpos */
	194	complain_overflow_bitfield, /* complain_on_overflow */
	195	coff_i386_reloc, /* special_function */
	196	"8", /* name */
	197	true, /* partial_inplace */
	198	0x000000ff, /* src_mask */
	199	0x000000ff, /* dst_mask */
89665c85	200	PCRELOFFSET), /* pcrel_offset */
48ee0757 SS	201	HOWTO (R_RELWORD, /* type */
	202	0, /* rightshift */
	203	1, /* size (0 = byte, 1 = short, 2 = long) */
	204	16, /* bitsize */
	205	false, /* pc_relative */
	206	0, /* bitpos */
	207	complain_overflow_bitfield, /* complain_on_overflow */
	208	coff_i386_reloc, /* special_function */
	209	"16", /* name */
	210	true, /* partial_inplace */
	211	0x0000ffff, /* src_mask */
	212	0x0000ffff, /* dst_mask */
89665c85	213	PCRELOFFSET), /* pcrel_offset */
48ee0757 SS	214	HOWTO (R_RELLONG, /* type */
	215	0, /* rightshift */
	216	2, /* size (0 = byte, 1 = short, 2 = long) */
	217	32, /* bitsize */
	218	false, /* pc_relative */
	219	0, /* bitpos */
	220	complain_overflow_bitfield, /* complain_on_overflow */
	221	coff_i386_reloc, /* special_function */
	222	"32", /* name */
	223	true, /* partial_inplace */
	224	0xffffffff, /* src_mask */
	225	0xffffffff, /* dst_mask */
89665c85	226	PCRELOFFSET), /* pcrel_offset */
48ee0757 SS	227	HOWTO (R_PCRBYTE, /* type */
	228	0, /* rightshift */
	229	0, /* size (0 = byte, 1 = short, 2 = long) */
	230	8, /* bitsize */
	231	true, /* pc_relative */
	232	0, /* bitpos */
	233	complain_overflow_signed, /* complain_on_overflow */
	234	coff_i386_reloc, /* special_function */
	235	"DISP8", /* name */
	236	true, /* partial_inplace */
	237	0x000000ff, /* src_mask */
	238	0x000000ff, /* dst_mask */
89665c85	239	PCRELOFFSET), /* pcrel_offset */
48ee0757 SS	240	HOWTO (R_PCRWORD, /* type */
	241	0, /* rightshift */
	242	1, /* size (0 = byte, 1 = short, 2 = long) */
	243	16, /* bitsize */
	244	true, /* pc_relative */
	245	0, /* bitpos */
	246	complain_overflow_signed, /* complain_on_overflow */
	247	coff_i386_reloc, /* special_function */
	248	"DISP16", /* name */
	249	true, /* partial_inplace */
	250	0x0000ffff, /* src_mask */
	251	0x0000ffff, /* dst_mask */
89665c85	252	PCRELOFFSET), /* pcrel_offset */
48ee0757 SS	253	HOWTO (R_PCRLONG, /* type */
	254	0, /* rightshift */
	255	2, /* size (0 = byte, 1 = short, 2 = long) */
	256	32, /* bitsize */
	257	true, /* pc_relative */
	258	0, /* bitpos */
	259	complain_overflow_signed, /* complain_on_overflow */
	260	coff_i386_reloc, /* special_function */
	261	"DISP32", /* name */
	262	true, /* partial_inplace */
	263	0xffffffff, /* src_mask */
	264	0xffffffff, /* dst_mask */
89665c85	265	PCRELOFFSET) /* pcrel_offset */
517496c5 SC	266	};
517496c5 SC	267
517496c5 SC	268	/* Turn a howto into a reloc nunmber */
517496c5 SC	269
6812b607	270	#define SELECT_RELOC(x,howto) { x.r_type = howto->type; }
517496c5	271	#define BADMAG(x) I386BADMAG(x)
3b4f1a5d SC	272	#define I386 1 /* Customize coffcode.h */
3b4f1a5d SC	273
c9301d7b	274	#define RTYPE2HOWTO(cache_ptr, dst) \
82b1edf7	275	(cache_ptr)->howto = howto_table + (dst)->r_type;
3b4f1a5d	276
48ee0757 SS	277	/* On SCO Unix 3.2.2 the native assembler generates two .data
	278	sections. We handle that by renaming the second one to .data2. It
	279	does no harm to do this for any 386 COFF target. */
	280	#define TWO_DATA_SECS
	281
	282	/* For 386 COFF a STYP_NOLOAD \| STYP_BSS section is part of a shared
	283	library. On some other COFF targets STYP_BSS is normally
	284	STYP_NOLOAD. */
	285	#define BSS_NOLOAD_IS_SHARED_LIBRARY
517496c5	286
48ee0757 SS	287	/* Compute the addend of a reloc. If the reloc is to a common symbol,
	288	the object file contains the value of the common symbol. By the
	289	time this is called, the linker may be using a different symbol
	290	from a different object file with a different value. Therefore, we
	291	hack wildly to locate the original symbol from this file so that we
	292	can make the correct adjustment. This macro sets coffsym to the
	293	symbol from the original file, and uses it to set the addend value
	294	correctly. If this is not a common symbol, the usual addend
	295	calculation is done, except that an additional tweak is needed for
	296	PC relative relocs.
	297	FIXME: This macro refers to symbols and asect; these are from the
	298	calling function, not the macro arguments. */
	299
	300	#define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
	301	{ \
	302	coff_symbol_type coffsym = (coff_symbol_type ) NULL; \
	303	if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
	304	coffsym = (obj_symbols (abfd) \
	305	+ (cache_ptr->sym_ptr_ptr - symbols)); \
	306	else if (ptr) \
	307	coffsym = coff_symbol_from (abfd, ptr); \
	308	if (coffsym != (coff_symbol_type *) NULL \
	309	&& coffsym->native->u.syment.n_scnum == 0) \
	310	cache_ptr->addend = - coffsym->native->u.syment.n_value; \
	311	else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
	312	&& ptr->section != (asection *) NULL) \
	313	cache_ptr->addend = - (ptr->section->vma + ptr->value); \
	314	else \
	315	cache_ptr->addend = 0; \
	316	if (ptr && howto_table[reloc.r_type].pc_relative) \
	317	cache_ptr->addend += asect->vma; \
	318	}
	319
82b1edf7 KR	320	/* We use the special COFF backend linker. */
	321	#define coff_relocate_section _bfd_coff_generic_relocate_section
	322
89665c85	323	static reloc_howto_type *
82b1edf7 KR	324	coff_i386_rtype_to_howto (abfd, sec, rel, h, sym, addendp)
	325	bfd *abfd;
	326	asection *sec;
	327	struct internal_reloc *rel;
	328	struct coff_link_hash_entry *h;
	329	struct internal_syment *sym;
	330	bfd_vma *addendp;
	331	{
89665c85 SC	332
89665c85 SC	333	reloc_howto_type *howto;
82b1edf7 KR	334
	335	howto = howto_table + rel->r_type;
	336
89665c85 SC	337	#ifdef COFF_WITH_PE
	338	*addendp = 0;
	339	#endif
	340
82b1edf7 KR	341	if (howto->pc_relative)
	342	*addendp += sec->vma;
	343
	344	if (sym != NULL && sym->n_scnum == 0 && sym->n_value != 0)
	345	{
	346	/* This is a common symbol. The section contents include the
	347	size (sym->n_value) as an addend. The relocate_section
	348	function will be adding in the final value of the symbol. We
	349	need to subtract out the current size in order to get the
	350	correct result. */
89665c85	351
82b1edf7	352	BFD_ASSERT (h != NULL);
89665c85 SC	353
	354
	355	#ifndef COFF_WITH_PE
	356	/* I think we do want to bypass this. If we don't, I have seen some data
	357	parameters get the wrong relcation address. If I link two versions
	358	with and without this section bypassed and then do a binary comparison,
	359	the addresses which are different can be looked up in the map. The
	360	case in which this section has been bypassed has addresses which correspond
	361	to values I can find in the map */
82b1edf7	362	*addendp -= sym->n_value;
89665c85	363	#endif
82b1edf7 KR	364	}
	365
	366	/* If the output symbol is common (in which case this must be a
	367	relocateable link), we need to add in the final size of the
	368	common symbol. */
89665c85	369	if (h != NULL && h->root.type == bfd_link_hash_common)
82b1edf7 KR	370	*addendp += h->root.u.c.size;
82b1edf7 KR	371
89665c85 SC	372
	373	#ifdef COFF_WITH_PE
	374	if (howto->pc_relative)
	375	*addendp -= 4;
	376	#endif
	377
82b1edf7 KR	378	return howto;
	379	}
	380
	381	#define coff_rtype_to_howto coff_i386_rtype_to_howto
	382
48ee0757	383	#include "coffcode.h"
517496c5	384
82b1edf7	385	static const bfd_target *
cbd8493e KR	386	i3coff_object_p(a)
	387	bfd *a;
	388	{
	389	return coff_object_p(a);
	390	}
517496c5	391
82b1edf7	392	const bfd_target
48ee0757 SS	393	#ifdef TARGET_SYM
	394	TARGET_SYM =
	395	#else
	396	i386coff_vec =
	397	#endif
517496c5	398	{
48ee0757 SS	399	#ifdef TARGET_NAME
	400	TARGET_NAME,
	401	#else
3b4f1a5d	402	"coff-i386", /* name */
48ee0757	403	#endif
6a469027 JG	404	bfd_target_coff_flavour,
	405	false, /* data byte order is little */
	406	false, /* header byte order is little */
517496c5 SC	407
	408	(HAS_RELOC \| EXEC_P \| /* object flags */
	409	HAS_LINENO \| HAS_DEBUG \|
82b1edf7	410	HAS_SYMS \| HAS_LOCALS \| WP_TEXT \| D_PAGED),
517496c5 SC	411
517496c5 SC	412	(SEC_HAS_CONTENTS \| SEC_ALLOC \| SEC_LOAD \| SEC_RELOC), /* section flags */
82b1edf7 KR	413	#ifdef TARGET_UNDERSCORE
	414	TARGET_UNDERSCORE, /* leading underscore */
	415	#else
294eaca4	416	0, /* leading underscore */
82b1edf7	417	#endif
517496c5 SC	418	'/', /* ar_pad_char */
	419	15, /* ar_max_namelen */
	420
6a469027	421	2, /* minimum alignment power */
48ee0757 SS	422	bfd_getl64, bfd_getl_signed_64, bfd_putl64,
	423	bfd_getl32, bfd_getl_signed_32, bfd_putl32,
	424	bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
	425	bfd_getl64, bfd_getl_signed_64, bfd_putl64,
	426	bfd_getl32, bfd_getl_signed_32, bfd_putl32,
	427	bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
517496c5	428
6a469027 JG	429	/* Note that we allow an object file to be treated as a core file as well. */
	430	{_bfd_dummy_target, i3coff_object_p, /* bfd_check_format */
	431	bfd_generic_archive_p, i3coff_object_p},
	432	{bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */
	433	bfd_false},
	434	{bfd_false, coff_write_object_contents, /* bfd_write_contents */
	435	_bfd_write_archive_contents, bfd_false},
517496c5	436
6812b607 ILT	437	BFD_JUMP_TABLE_GENERIC (coff),
	438	BFD_JUMP_TABLE_COPY (coff),
	439	BFD_JUMP_TABLE_CORE (_bfd_nocore),
	440	BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
	441	BFD_JUMP_TABLE_SYMBOLS (coff),
	442	BFD_JUMP_TABLE_RELOCS (coff),
	443	BFD_JUMP_TABLE_WRITE (coff),
	444	BFD_JUMP_TABLE_LINK (coff),
82b1edf7	445	BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
6812b607	446
48ee0757 SS	447	COFF_SWAP_TABLE,
48ee0757 SS	448	};