[deliverable/binutils-gdb.git] / bfd / mach-o-i386.c

/* Intel i386 Mach-O support for BFD.
   Copyright (C) 2009-2020 Free Software Foundation, Inc.

   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 3 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., 51 Franklin Street - Fifth Floor, Boston,
   MA 02110-1301, USA.  */

#include "sysdep.h"
#include "bfd.h"
#include "libbfd.h"
#include "libiberty.h"
#include "mach-o.h"
#include "mach-o/reloc.h"

#define bfd_mach_o_object_p bfd_mach_o_i386_object_p
#define bfd_mach_o_core_p bfd_mach_o_i386_core_p
#define bfd_mach_o_mkobject bfd_mach_o_i386_mkobject

static const bfd_target *
bfd_mach_o_i386_object_p (bfd *abfd)
{
  return bfd_mach_o_header_p (abfd, 0, 0, BFD_MACH_O_CPU_TYPE_I386);
}

static const bfd_target *
bfd_mach_o_i386_core_p (bfd *abfd)
{
  return bfd_mach_o_header_p (abfd, 0,
			      BFD_MACH_O_MH_CORE, BFD_MACH_O_CPU_TYPE_I386);
}

static bfd_boolean
bfd_mach_o_i386_mkobject (bfd *abfd)
{
  bfd_mach_o_data_struct *mdata;

  if (!bfd_mach_o_mkobject_init (abfd))
    return FALSE;

  mdata = bfd_mach_o_get_data (abfd);
  mdata->header.magic = BFD_MACH_O_MH_MAGIC;
  mdata->header.cputype = BFD_MACH_O_CPU_TYPE_I386;
  mdata->header.cpusubtype = BFD_MACH_O_CPU_SUBTYPE_X86_ALL;
  mdata->header.byteorder = BFD_ENDIAN_LITTLE;
  mdata->header.version = 1;

  return TRUE;
}

static reloc_howto_type i386_howto_table[]=
{
  /* 0 */
  HOWTO(BFD_RELOC_32, 0, 2, 32, FALSE, 0,
	complain_overflow_bitfield,
	NULL, "32",
	FALSE, 0xffffffff, 0xffffffff, FALSE),
  HOWTO(BFD_RELOC_16, 0, 1, 16, FALSE, 0,
	complain_overflow_bitfield,
	NULL, "16",
	FALSE, 0xffff, 0xffff, FALSE),
  HOWTO(BFD_RELOC_8, 0, 0, 8, FALSE, 0,
	complain_overflow_bitfield,
	NULL, "8",
	FALSE, 0xff, 0xff, FALSE),
  HOWTO(BFD_RELOC_32_PCREL, 0, 2, 32, TRUE, 0,
	complain_overflow_bitfield,
	NULL, "DISP32",
	FALSE, 0xffffffff, 0xffffffff, TRUE),
  /* 4 */
  HOWTO(BFD_RELOC_16_PCREL, 0, 1, 16, TRUE, 0,
	complain_overflow_bitfield,
	NULL, "DISP16",
	FALSE, 0xffff, 0xffff, TRUE),
  HOWTO(BFD_RELOC_MACH_O_SECTDIFF, 0, 2, 32, FALSE, 0,
	complain_overflow_bitfield,
	NULL, "SECTDIFF_32",
	FALSE, 0xffffffff, 0xffffffff, FALSE),
  HOWTO(BFD_RELOC_MACH_O_LOCAL_SECTDIFF, 0, 2, 32, FALSE, 0,
	complain_overflow_bitfield,
	NULL, "LSECTDIFF_32",
	FALSE, 0xffffffff, 0xffffffff, FALSE),
  HOWTO(BFD_RELOC_MACH_O_PAIR, 0, 2, 32, FALSE, 0,
	complain_overflow_bitfield,
	NULL, "PAIR_32",
	FALSE, 0xffffffff, 0xffffffff, FALSE),
  /* 8 */
  HOWTO(BFD_RELOC_MACH_O_SECTDIFF, 0, 1, 16, FALSE, 0,
	complain_overflow_bitfield,
	NULL, "SECTDIFF_16",
	FALSE, 0xffff, 0xffff, FALSE),
  HOWTO(BFD_RELOC_MACH_O_LOCAL_SECTDIFF, 0, 1, 16, FALSE, 0,
	complain_overflow_bitfield,
	NULL, "LSECTDIFF_16",
	FALSE, 0xffff, 0xffff, FALSE),
  HOWTO(BFD_RELOC_MACH_O_PAIR, 0, 1, 16, FALSE, 0,
	complain_overflow_bitfield,
	NULL, "PAIR_16",
	FALSE, 0xffff, 0xffff, FALSE),
};

static bfd_boolean
bfd_mach_o_i386_canonicalize_one_reloc (bfd *       abfd,
					struct mach_o_reloc_info_external * raw,
					arelent *   res,
					asymbol **  syms,
					arelent *   res_base)
{
  bfd_mach_o_reloc_info reloc;

  if (!bfd_mach_o_pre_canonicalize_one_reloc (abfd, raw, &reloc, res, syms))
    return FALSE;

  if (reloc.r_scattered)
    {
      switch (reloc.r_type)
	{
	case BFD_MACH_O_GENERIC_RELOC_PAIR:
	  /* PR 21813: Check for a corrupt PAIR reloc at the start.  */
	  if (res == res_base)
	    return FALSE;
	  if (reloc.r_length == 2)
	    {
	      res->howto = &i386_howto_table[7];
	      res->address = res[-1].address;
	      return TRUE;
	    }
	  else if (reloc.r_length == 1)
	    {
	      res->howto = &i386_howto_table[10];
	      res->address = res[-1].address;
	      return TRUE;
	    }
	  return FALSE;
	case BFD_MACH_O_GENERIC_RELOC_SECTDIFF:
	  if (reloc.r_length == 2)
	    {
	      res->howto = &i386_howto_table[5];
	      return TRUE;
	    }
	  else if (reloc.r_length == 1)
	    {
	      res->howto = &i386_howto_table[8];
	      return TRUE;
	    }
	  return FALSE;
	case BFD_MACH_O_GENERIC_RELOC_LOCAL_SECTDIFF:
	  if (reloc.r_length == 2)
	    {
	      res->howto = &i386_howto_table[6];
	      return TRUE;
	    }
	  else if (reloc.r_length == 1)
	    {
	      res->howto = &i386_howto_table[9];
	      return TRUE;
	    }
	  return FALSE;
	default:
	  break;
	}
    }
  else
    {
      switch (reloc.r_type)
	{
	case BFD_MACH_O_GENERIC_RELOC_VANILLA:
	  switch ((reloc.r_length << 1) | reloc.r_pcrel)
	    {
	    case 0: /* len = 0, pcrel = 0  */
	      res->howto = &i386_howto_table[2];
	      return TRUE;
	    case 2: /* len = 1, pcrel = 0  */
	      res->howto = &i386_howto_table[1];
	      return TRUE;
	    case 3: /* len = 1, pcrel = 1  */
	      res->howto = &i386_howto_table[4];
	      return TRUE;
	    case 4: /* len = 2, pcrel = 0  */
	      res->howto = &i386_howto_table[0];
	      return TRUE;
	    case 5: /* len = 2, pcrel = 1  */
	      res->howto = &i386_howto_table[3];
	      return TRUE;
	    default:
	      return FALSE;
	    }
	default:
	  break;
	}
    }
  return FALSE;
}

static bfd_boolean
bfd_mach_o_i386_swap_reloc_out (arelent *rel, bfd_mach_o_reloc_info *rinfo)
{
  rinfo->r_address = rel->address;
  switch (rel->howto->type)
    {
    case BFD_RELOC_32:
    case BFD_RELOC_32_PCREL:
    case BFD_RELOC_16:
    case BFD_RELOC_16_PCREL:
    case BFD_RELOC_8:
      rinfo->r_scattered = 0;
      rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_VANILLA;
      rinfo->r_pcrel = rel->howto->pc_relative;
      rinfo->r_length = rel->howto->size; /* Correct in practice.  */
      if ((*rel->sym_ptr_ptr)->flags & BSF_SECTION_SYM)
	{
	  rinfo->r_extern = 0;
	  rinfo->r_value =
	    (*rel->sym_ptr_ptr)->section->output_section->target_index;
	}
      else
	{
	  rinfo->r_extern = 1;
	  rinfo->r_value = (*rel->sym_ptr_ptr)->udata.i;
	}
      break;
    case BFD_RELOC_MACH_O_SECTDIFF:
      rinfo->r_scattered = 1;
      rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_SECTDIFF;
      rinfo->r_pcrel = 0;
      rinfo->r_length = rel->howto->size;
      rinfo->r_extern = 0;
      rinfo->r_value = rel->addend;
      break;
    case BFD_RELOC_MACH_O_LOCAL_SECTDIFF:
      rinfo->r_scattered = 1;
      rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_LOCAL_SECTDIFF;
      rinfo->r_pcrel = 0;
      rinfo->r_length = rel->howto->size;
      rinfo->r_extern = 0;
      rinfo->r_value = rel->addend;
      break;
    case BFD_RELOC_MACH_O_PAIR:
      rinfo->r_address = 0;
      rinfo->r_scattered = 1;
      rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_PAIR;
      rinfo->r_pcrel = 0;
      rinfo->r_length = rel->howto->size;
      rinfo->r_extern = 0;
      rinfo->r_value = rel->addend;
      break;
    default:
      return FALSE;
    }
  return TRUE;
}

static reloc_howto_type *
bfd_mach_o_i386_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
				       bfd_reloc_code_real_type code)
{
  unsigned int i;

  for (i = 0; i < sizeof (i386_howto_table) / sizeof (*i386_howto_table); i++)
    if (code == i386_howto_table[i].type)
      return &i386_howto_table[i];
  return NULL;
}

static reloc_howto_type *
bfd_mach_o_i386_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
				       const char *name ATTRIBUTE_UNUSED)
{
  return NULL;
}

static bfd_boolean
bfd_mach_o_i386_print_thread (bfd *abfd, bfd_mach_o_thread_flavour *thread,
			      void *vfile, char *buf)
{
  FILE *file = (FILE *)vfile;

  switch (thread->flavour)
    {
    case BFD_MACH_O_x86_THREAD_STATE:
      if (thread->size < (8 + 16 * 4))
	return FALSE;
      fprintf (file, "   x86_THREAD_STATE:\n");
      fprintf (file, "    flavor: 0x%08lx  count: 0x%08lx\n",
	       (unsigned long)bfd_get_32 (abfd, buf + 0),
	       (unsigned long)bfd_get_32 (abfd, buf + 4));
      fprintf (file, "     eax: %08lx  ebx: %08lx  ecx: %08lx  edx: %08lx\n",
	       (unsigned long)bfd_get_32 (abfd, buf + 8),
	       (unsigned long)bfd_get_32 (abfd, buf + 12),
	       (unsigned long)bfd_get_32 (abfd, buf + 16),
	       (unsigned long)bfd_get_32 (abfd, buf + 20));
      fprintf (file, "     edi: %08lx  esi: %08lx  ebp: %08lx  esp: %08lx\n",
	       (unsigned long)bfd_get_32 (abfd, buf + 24),
	       (unsigned long)bfd_get_32 (abfd, buf + 28),
	       (unsigned long)bfd_get_32 (abfd, buf + 32),
	       (unsigned long)bfd_get_32 (abfd, buf + 36));
      fprintf (file, "      ss: %08lx  flg: %08lx  eip: %08lx   cs: %08lx\n",
	       (unsigned long)bfd_get_32 (abfd, buf + 40),
	       (unsigned long)bfd_get_32 (abfd, buf + 44),
	       (unsigned long)bfd_get_32 (abfd, buf + 48),
	       (unsigned long)bfd_get_32 (abfd, buf + 52));
      fprintf (file, "      ds: %08lx   es: %08lx   fs: %08lx   gs: %08lx\n",
	       (unsigned long)bfd_get_32 (abfd, buf + 56),
	       (unsigned long)bfd_get_32 (abfd, buf + 60),
	       (unsigned long)bfd_get_32 (abfd, buf + 64),
	       (unsigned long)bfd_get_32 (abfd, buf + 68));
      return TRUE;
    case BFD_MACH_O_x86_FLOAT_STATE:
      if (thread->size < 8)
	return FALSE;
      fprintf (file, "   x86_FLOAT_STATE:\n");
      fprintf (file, "    flavor: 0x%08lx  count: 0x%08lx\n",
	       (unsigned long)bfd_get_32 (abfd, buf + 0),
	       (unsigned long)bfd_get_32 (abfd, buf + 4));
      return TRUE;
    case BFD_MACH_O_x86_EXCEPTION_STATE:
      if (thread->size < 8 + 3 * 4)
	return FALSE;
      fprintf (file, "   x86_EXCEPTION_STATE:\n");
      fprintf (file, "    flavor: 0x%08lx  count: 0x%08lx\n",
	       (unsigned long)bfd_get_32 (abfd, buf + 0),
	       (unsigned long)bfd_get_32 (abfd, buf + 4));
      fprintf (file, "    trapno: %08lx  err: %08lx  faultaddr: %08lx\n",
	       (unsigned long)bfd_get_32 (abfd, buf + 8),
	       (unsigned long)bfd_get_32 (abfd, buf + 12),
	       (unsigned long)bfd_get_32 (abfd, buf + 16));
      return TRUE;
    default:
      break;
    }
  return FALSE;
}

static const mach_o_section_name_xlat text_section_names_xlat[] =
  {
    {	".symbol_stub",			"__symbol_stub",
	SEC_CODE | SEC_LOAD,		BFD_MACH_O_S_SYMBOL_STUBS,
	BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS,
					0},
    {	".picsymbol_stub",		"__picsymbol_stub",
	SEC_CODE | SEC_LOAD,		BFD_MACH_O_S_SYMBOL_STUBS,
	BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS,
					0},
    { NULL, NULL, 0, 0, 0, 0}
  };

static const mach_o_section_name_xlat data_section_names_xlat[] =
  {
    /* The first two are recognized by i386, but not emitted for x86 by
       modern GCC.  */
    {	".non_lazy_symbol_pointer",	"__nl_symbol_ptr",
	SEC_DATA | SEC_LOAD,		BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS,
	BFD_MACH_O_S_ATTR_NONE,		2},
    {	".lazy_symbol_pointer",		"__la_symbol_ptr",
	SEC_DATA | SEC_LOAD,		BFD_MACH_O_S_LAZY_SYMBOL_POINTERS,
	BFD_MACH_O_S_ATTR_NONE,		2},
    {	".lazy_symbol_pointer2",	"__la_sym_ptr2",
	SEC_DATA | SEC_LOAD,		BFD_MACH_O_S_LAZY_SYMBOL_POINTERS,
	BFD_MACH_O_S_ATTR_NONE,		2},
    {	".lazy_symbol_pointer3",	"__la_sym_ptr3",
	SEC_DATA | SEC_LOAD,		BFD_MACH_O_S_LAZY_SYMBOL_POINTERS,
	BFD_MACH_O_S_ATTR_NONE,		2},
    { NULL, NULL, 0, 0, 0, 0}
  };

static const mach_o_section_name_xlat import_section_names_xlat[] =
  {
    {	".picsymbol_stub3",		"__jump_table",
	SEC_CODE | SEC_LOAD,		BFD_MACH_O_S_SYMBOL_STUBS,
	BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS
	| BFD_MACH_O_S_SELF_MODIFYING_CODE,
					6},
    {	".non_lazy_symbol_pointer_x86",	"__pointers",
	SEC_DATA | SEC_LOAD,		BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS,
	BFD_MACH_O_S_ATTR_NONE,		2},
    { NULL, NULL, 0, 0, 0, 0}
  };

const mach_o_segment_name_xlat mach_o_i386_segsec_names_xlat[] =
  {
    { "__TEXT", text_section_names_xlat },
    { "__DATA", data_section_names_xlat },
    { "__IMPORT", import_section_names_xlat },
    { NULL, NULL }
  };

#define bfd_mach_o_canonicalize_one_reloc  bfd_mach_o_i386_canonicalize_one_reloc
#define bfd_mach_o_swap_reloc_out	   bfd_mach_o_i386_swap_reloc_out
#define bfd_mach_o_print_thread		   bfd_mach_o_i386_print_thread

#define bfd_mach_o_tgt_seg_table mach_o_i386_segsec_names_xlat
#define bfd_mach_o_section_type_valid_for_tgt NULL

#define bfd_mach_o_bfd_reloc_type_lookup bfd_mach_o_i386_bfd_reloc_type_lookup
#define bfd_mach_o_bfd_reloc_name_lookup bfd_mach_o_i386_bfd_reloc_name_lookup

#define TARGET_NAME		i386_mach_o_vec
#define TARGET_STRING		"mach-o-i386"
#define TARGET_ARCHITECTURE	bfd_arch_i386
#define TARGET_PAGESIZE		4096
#define TARGET_BIG_ENDIAN	0
#define TARGET_ARCHIVE		0
#define TARGET_PRIORITY		0
#include "mach-o-target.c"
Commit	Line	Data
	1	/* Intel i386 Mach-O support for BFD.
	2	Copyright (C) 2009-2020 Free Software Foundation, Inc.
	3
	4	This file is part of BFD, the Binary File Descriptor library.
	5
	6	This program is free software; you can redistribute it and/or modify
	7	it under the terms of the GNU General Public License as published by
	8	the Free Software Foundation; either version 3 of the License, or
	9	(at your option) any later version.
	10
	11	This program is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
	15
	16	You should have received a copy of the GNU General Public License
	17	along with this program; if not, write to the Free Software
	18	Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
	19	MA 02110-1301, USA. */
	20
	21	#include "sysdep.h"
	22	#include "bfd.h"
	23	#include "libbfd.h"
	24	#include "libiberty.h"
	25	#include "mach-o.h"
	26	#include "mach-o/reloc.h"
	27
	28	#define bfd_mach_o_object_p bfd_mach_o_i386_object_p
	29	#define bfd_mach_o_core_p bfd_mach_o_i386_core_p
	30	#define bfd_mach_o_mkobject bfd_mach_o_i386_mkobject
	31
	32	static const bfd_target *
	33	bfd_mach_o_i386_object_p (bfd *abfd)
	34	{
	35	return bfd_mach_o_header_p (abfd, 0, 0, BFD_MACH_O_CPU_TYPE_I386);
	36	}
	37
	38	static const bfd_target *
	39	bfd_mach_o_i386_core_p (bfd *abfd)
	40	{
	41	return bfd_mach_o_header_p (abfd, 0,
	42	BFD_MACH_O_MH_CORE, BFD_MACH_O_CPU_TYPE_I386);
	43	}
	44
	45	static bfd_boolean
	46	bfd_mach_o_i386_mkobject (bfd *abfd)
	47	{
	48	bfd_mach_o_data_struct *mdata;
	49
	50	if (!bfd_mach_o_mkobject_init (abfd))
	51	return FALSE;
	52
	53	mdata = bfd_mach_o_get_data (abfd);
	54	mdata->header.magic = BFD_MACH_O_MH_MAGIC;
	55	mdata->header.cputype = BFD_MACH_O_CPU_TYPE_I386;
	56	mdata->header.cpusubtype = BFD_MACH_O_CPU_SUBTYPE_X86_ALL;
	57	mdata->header.byteorder = BFD_ENDIAN_LITTLE;
	58	mdata->header.version = 1;
	59
	60	return TRUE;
	61	}
	62
	63	static reloc_howto_type i386_howto_table[]=
	64	{
	65	/* 0 */
	66	HOWTO(BFD_RELOC_32, 0, 2, 32, FALSE, 0,
	67	complain_overflow_bitfield,
	68	NULL, "32",
	69	FALSE, 0xffffffff, 0xffffffff, FALSE),
	70	HOWTO(BFD_RELOC_16, 0, 1, 16, FALSE, 0,
	71	complain_overflow_bitfield,
	72	NULL, "16",
	73	FALSE, 0xffff, 0xffff, FALSE),
	74	HOWTO(BFD_RELOC_8, 0, 0, 8, FALSE, 0,
	75	complain_overflow_bitfield,
	76	NULL, "8",
	77	FALSE, 0xff, 0xff, FALSE),
	78	HOWTO(BFD_RELOC_32_PCREL, 0, 2, 32, TRUE, 0,
	79	complain_overflow_bitfield,
	80	NULL, "DISP32",
	81	FALSE, 0xffffffff, 0xffffffff, TRUE),
	82	/* 4 */
	83	HOWTO(BFD_RELOC_16_PCREL, 0, 1, 16, TRUE, 0,
	84	complain_overflow_bitfield,
	85	NULL, "DISP16",
	86	FALSE, 0xffff, 0xffff, TRUE),
	87	HOWTO(BFD_RELOC_MACH_O_SECTDIFF, 0, 2, 32, FALSE, 0,
	88	complain_overflow_bitfield,
	89	NULL, "SECTDIFF_32",
	90	FALSE, 0xffffffff, 0xffffffff, FALSE),
	91	HOWTO(BFD_RELOC_MACH_O_LOCAL_SECTDIFF, 0, 2, 32, FALSE, 0,
	92	complain_overflow_bitfield,
	93	NULL, "LSECTDIFF_32",
	94	FALSE, 0xffffffff, 0xffffffff, FALSE),
	95	HOWTO(BFD_RELOC_MACH_O_PAIR, 0, 2, 32, FALSE, 0,
	96	complain_overflow_bitfield,
	97	NULL, "PAIR_32",
	98	FALSE, 0xffffffff, 0xffffffff, FALSE),
	99	/* 8 */
	100	HOWTO(BFD_RELOC_MACH_O_SECTDIFF, 0, 1, 16, FALSE, 0,
	101	complain_overflow_bitfield,
	102	NULL, "SECTDIFF_16",
	103	FALSE, 0xffff, 0xffff, FALSE),
	104	HOWTO(BFD_RELOC_MACH_O_LOCAL_SECTDIFF, 0, 1, 16, FALSE, 0,
	105	complain_overflow_bitfield,
	106	NULL, "LSECTDIFF_16",
	107	FALSE, 0xffff, 0xffff, FALSE),
	108	HOWTO(BFD_RELOC_MACH_O_PAIR, 0, 1, 16, FALSE, 0,
	109	complain_overflow_bitfield,
	110	NULL, "PAIR_16",
	111	FALSE, 0xffff, 0xffff, FALSE),
	112	};
	113
	114	static bfd_boolean
	115	bfd_mach_o_i386_canonicalize_one_reloc (bfd * abfd,
	116	struct mach_o_reloc_info_external * raw,
	117	arelent * res,
	118	asymbol ** syms,
	119	arelent * res_base)
	120	{
	121	bfd_mach_o_reloc_info reloc;
	122
	123	if (!bfd_mach_o_pre_canonicalize_one_reloc (abfd, raw, &reloc, res, syms))
	124	return FALSE;
	125
	126	if (reloc.r_scattered)
	127	{
	128	switch (reloc.r_type)
	129	{
	130	case BFD_MACH_O_GENERIC_RELOC_PAIR:
	131	/* PR 21813: Check for a corrupt PAIR reloc at the start. */
	132	if (res == res_base)
	133	return FALSE;
	134	if (reloc.r_length == 2)
	135	{
	136	res->howto = &i386_howto_table[7];
	137	res->address = res[-1].address;
	138	return TRUE;
	139	}
	140	else if (reloc.r_length == 1)
	141	{
	142	res->howto = &i386_howto_table[10];
	143	res->address = res[-1].address;
	144	return TRUE;
	145	}
	146	return FALSE;
	147	case BFD_MACH_O_GENERIC_RELOC_SECTDIFF:
	148	if (reloc.r_length == 2)
	149	{
	150	res->howto = &i386_howto_table[5];
	151	return TRUE;
	152	}
	153	else if (reloc.r_length == 1)
	154	{
	155	res->howto = &i386_howto_table[8];
	156	return TRUE;
	157	}
	158	return FALSE;
	159	case BFD_MACH_O_GENERIC_RELOC_LOCAL_SECTDIFF:
	160	if (reloc.r_length == 2)
	161	{
	162	res->howto = &i386_howto_table[6];
	163	return TRUE;
	164	}
	165	else if (reloc.r_length == 1)
	166	{
	167	res->howto = &i386_howto_table[9];
	168	return TRUE;
	169	}
	170	return FALSE;
	171	default:
	172	break;
	173	}
	174	}
	175	else
	176	{
	177	switch (reloc.r_type)
	178	{
	179	case BFD_MACH_O_GENERIC_RELOC_VANILLA:
	180	switch ((reloc.r_length << 1) \| reloc.r_pcrel)
	181	{
	182	case 0: /* len = 0, pcrel = 0 */
	183	res->howto = &i386_howto_table[2];
	184	return TRUE;
	185	case 2: /* len = 1, pcrel = 0 */
	186	res->howto = &i386_howto_table[1];
	187	return TRUE;
	188	case 3: /* len = 1, pcrel = 1 */
	189	res->howto = &i386_howto_table[4];
	190	return TRUE;
	191	case 4: /* len = 2, pcrel = 0 */
	192	res->howto = &i386_howto_table[0];
	193	return TRUE;
	194	case 5: /* len = 2, pcrel = 1 */
	195	res->howto = &i386_howto_table[3];
	196	return TRUE;
	197	default:
	198	return FALSE;
	199	}
	200	default:
	201	break;
	202	}
	203	}
	204	return FALSE;
	205	}
	206
	207	static bfd_boolean
	208	bfd_mach_o_i386_swap_reloc_out (arelent rel, bfd_mach_o_reloc_info rinfo)
	209	{
	210	rinfo->r_address = rel->address;
	211	switch (rel->howto->type)
	212	{
	213	case BFD_RELOC_32:
	214	case BFD_RELOC_32_PCREL:
	215	case BFD_RELOC_16:
	216	case BFD_RELOC_16_PCREL:
	217	case BFD_RELOC_8:
	218	rinfo->r_scattered = 0;
	219	rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_VANILLA;
	220	rinfo->r_pcrel = rel->howto->pc_relative;
	221	rinfo->r_length = rel->howto->size; /* Correct in practice. */
	222	if ((*rel->sym_ptr_ptr)->flags & BSF_SECTION_SYM)
	223	{
	224	rinfo->r_extern = 0;
	225	rinfo->r_value =
	226	(*rel->sym_ptr_ptr)->section->output_section->target_index;
	227	}
	228	else
	229	{
	230	rinfo->r_extern = 1;
	231	rinfo->r_value = (*rel->sym_ptr_ptr)->udata.i;
	232	}
	233	break;
	234	case BFD_RELOC_MACH_O_SECTDIFF:
	235	rinfo->r_scattered = 1;
	236	rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_SECTDIFF;
	237	rinfo->r_pcrel = 0;
	238	rinfo->r_length = rel->howto->size;
	239	rinfo->r_extern = 0;
	240	rinfo->r_value = rel->addend;
	241	break;
	242	case BFD_RELOC_MACH_O_LOCAL_SECTDIFF:
	243	rinfo->r_scattered = 1;
	244	rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_LOCAL_SECTDIFF;
	245	rinfo->r_pcrel = 0;
	246	rinfo->r_length = rel->howto->size;
	247	rinfo->r_extern = 0;
	248	rinfo->r_value = rel->addend;
	249	break;
	250	case BFD_RELOC_MACH_O_PAIR:
	251	rinfo->r_address = 0;
	252	rinfo->r_scattered = 1;
	253	rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_PAIR;
	254	rinfo->r_pcrel = 0;
	255	rinfo->r_length = rel->howto->size;
	256	rinfo->r_extern = 0;
	257	rinfo->r_value = rel->addend;
	258	break;
	259	default:
	260	return FALSE;
	261	}
	262	return TRUE;
	263	}
	264
	265	static reloc_howto_type *
	266	bfd_mach_o_i386_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
	267	bfd_reloc_code_real_type code)
	268	{
	269	unsigned int i;
	270
	271	for (i = 0; i < sizeof (i386_howto_table) / sizeof (*i386_howto_table); i++)
	272	if (code == i386_howto_table[i].type)
	273	return &i386_howto_table[i];
	274	return NULL;
	275	}
	276
	277	static reloc_howto_type *
	278	bfd_mach_o_i386_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
	279	const char *name ATTRIBUTE_UNUSED)
	280	{
	281	return NULL;
	282	}
	283
	284	static bfd_boolean
	285	bfd_mach_o_i386_print_thread (bfd abfd, bfd_mach_o_thread_flavour thread,
	286	void vfile, char buf)
	287	{
	288	FILE file = (FILE )vfile;
	289
	290	switch (thread->flavour)
	291	{
	292	case BFD_MACH_O_x86_THREAD_STATE:
	293	if (thread->size < (8 + 16 * 4))
	294	return FALSE;
	295	fprintf (file, " x86_THREAD_STATE:\n");
	296	fprintf (file, " flavor: 0x%08lx count: 0x%08lx\n",
	297	(unsigned long)bfd_get_32 (abfd, buf + 0),
	298	(unsigned long)bfd_get_32 (abfd, buf + 4));
	299	fprintf (file, " eax: %08lx ebx: %08lx ecx: %08lx edx: %08lx\n",
	300	(unsigned long)bfd_get_32 (abfd, buf + 8),
	301	(unsigned long)bfd_get_32 (abfd, buf + 12),
	302	(unsigned long)bfd_get_32 (abfd, buf + 16),
	303	(unsigned long)bfd_get_32 (abfd, buf + 20));
	304	fprintf (file, " edi: %08lx esi: %08lx ebp: %08lx esp: %08lx\n",
	305	(unsigned long)bfd_get_32 (abfd, buf + 24),
	306	(unsigned long)bfd_get_32 (abfd, buf + 28),
	307	(unsigned long)bfd_get_32 (abfd, buf + 32),
	308	(unsigned long)bfd_get_32 (abfd, buf + 36));
	309	fprintf (file, " ss: %08lx flg: %08lx eip: %08lx cs: %08lx\n",
	310	(unsigned long)bfd_get_32 (abfd, buf + 40),
	311	(unsigned long)bfd_get_32 (abfd, buf + 44),
	312	(unsigned long)bfd_get_32 (abfd, buf + 48),
	313	(unsigned long)bfd_get_32 (abfd, buf + 52));
	314	fprintf (file, " ds: %08lx es: %08lx fs: %08lx gs: %08lx\n",
	315	(unsigned long)bfd_get_32 (abfd, buf + 56),
	316	(unsigned long)bfd_get_32 (abfd, buf + 60),
	317	(unsigned long)bfd_get_32 (abfd, buf + 64),
	318	(unsigned long)bfd_get_32 (abfd, buf + 68));
	319	return TRUE;
	320	case BFD_MACH_O_x86_FLOAT_STATE:
	321	if (thread->size < 8)
	322	return FALSE;
	323	fprintf (file, " x86_FLOAT_STATE:\n");
	324	fprintf (file, " flavor: 0x%08lx count: 0x%08lx\n",
	325	(unsigned long)bfd_get_32 (abfd, buf + 0),
	326	(unsigned long)bfd_get_32 (abfd, buf + 4));
	327	return TRUE;
	328	case BFD_MACH_O_x86_EXCEPTION_STATE:
	329	if (thread->size < 8 + 3 * 4)
	330	return FALSE;
	331	fprintf (file, " x86_EXCEPTION_STATE:\n");
	332	fprintf (file, " flavor: 0x%08lx count: 0x%08lx\n",
	333	(unsigned long)bfd_get_32 (abfd, buf + 0),
	334	(unsigned long)bfd_get_32 (abfd, buf + 4));
	335	fprintf (file, " trapno: %08lx err: %08lx faultaddr: %08lx\n",
	336	(unsigned long)bfd_get_32 (abfd, buf + 8),
	337	(unsigned long)bfd_get_32 (abfd, buf + 12),
	338	(unsigned long)bfd_get_32 (abfd, buf + 16));
	339	return TRUE;
	340	default:
	341	break;
	342	}
	343	return FALSE;
	344	}
	345
	346	static const mach_o_section_name_xlat text_section_names_xlat[] =
	347	{
	348	{ ".symbol_stub", "__symbol_stub",
	349	SEC_CODE \| SEC_LOAD, BFD_MACH_O_S_SYMBOL_STUBS,
	350	BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS,
	351	0},
	352	{ ".picsymbol_stub", "__picsymbol_stub",
	353	SEC_CODE \| SEC_LOAD, BFD_MACH_O_S_SYMBOL_STUBS,
	354	BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS,
	355	0},
	356	{ NULL, NULL, 0, 0, 0, 0}
	357	};
	358
	359	static const mach_o_section_name_xlat data_section_names_xlat[] =
	360	{
	361	/* The first two are recognized by i386, but not emitted for x86 by
	362	modern GCC. */
	363	{ ".non_lazy_symbol_pointer", "__nl_symbol_ptr",
	364	SEC_DATA \| SEC_LOAD, BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS,
	365	BFD_MACH_O_S_ATTR_NONE, 2},
	366	{ ".lazy_symbol_pointer", "__la_symbol_ptr",
	367	SEC_DATA \| SEC_LOAD, BFD_MACH_O_S_LAZY_SYMBOL_POINTERS,
	368	BFD_MACH_O_S_ATTR_NONE, 2},
	369	{ ".lazy_symbol_pointer2", "__la_sym_ptr2",
	370	SEC_DATA \| SEC_LOAD, BFD_MACH_O_S_LAZY_SYMBOL_POINTERS,
	371	BFD_MACH_O_S_ATTR_NONE, 2},
	372	{ ".lazy_symbol_pointer3", "__la_sym_ptr3",
	373	SEC_DATA \| SEC_LOAD, BFD_MACH_O_S_LAZY_SYMBOL_POINTERS,
	374	BFD_MACH_O_S_ATTR_NONE, 2},
	375	{ NULL, NULL, 0, 0, 0, 0}
	376	};
	377
	378	static const mach_o_section_name_xlat import_section_names_xlat[] =
	379	{
	380	{ ".picsymbol_stub3", "__jump_table",
	381	SEC_CODE \| SEC_LOAD, BFD_MACH_O_S_SYMBOL_STUBS,
	382	BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS
	383	\| BFD_MACH_O_S_SELF_MODIFYING_CODE,
	384	6},
	385	{ ".non_lazy_symbol_pointer_x86", "__pointers",
	386	SEC_DATA \| SEC_LOAD, BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS,
	387	BFD_MACH_O_S_ATTR_NONE, 2},
	388	{ NULL, NULL, 0, 0, 0, 0}
	389	};
	390
	391	const mach_o_segment_name_xlat mach_o_i386_segsec_names_xlat[] =
	392	{
	393	{ "__TEXT", text_section_names_xlat },
	394	{ "__DATA", data_section_names_xlat },
	395	{ "__IMPORT", import_section_names_xlat },
	396	{ NULL, NULL }
	397	};
	398
	399	#define bfd_mach_o_canonicalize_one_reloc bfd_mach_o_i386_canonicalize_one_reloc
	400	#define bfd_mach_o_swap_reloc_out bfd_mach_o_i386_swap_reloc_out
	401	#define bfd_mach_o_print_thread bfd_mach_o_i386_print_thread
	402
	403	#define bfd_mach_o_tgt_seg_table mach_o_i386_segsec_names_xlat
	404	#define bfd_mach_o_section_type_valid_for_tgt NULL
	405
	406	#define bfd_mach_o_bfd_reloc_type_lookup bfd_mach_o_i386_bfd_reloc_type_lookup
	407	#define bfd_mach_o_bfd_reloc_name_lookup bfd_mach_o_i386_bfd_reloc_name_lookup
	408
	409	#define TARGET_NAME i386_mach_o_vec
	410	#define TARGET_STRING "mach-o-i386"
	411	#define TARGET_ARCHITECTURE bfd_arch_i386
	412	#define TARGET_PAGESIZE 4096
	413	#define TARGET_BIG_ENDIAN 0
	414	#define TARGET_ARCHIVE 0
	415	#define TARGET_PRIORITY 0
	416	#include "mach-o-target.c"