[thirdparty/binutils-gdb.git] / bfd / mach-o-arm.c

/* ARM Mach-O support for BFD.
   Copyright (C) 2015-2018 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 "mach-o.h"
#include "bfd.h"
#include "libbfd.h"
#include "libiberty.h"
#include "mach-o/arm.h"

#define bfd_mach_o_object_p bfd_mach_o_arm_object_p
#define bfd_mach_o_core_p bfd_mach_o_arm_core_p
#define bfd_mach_o_mkobject bfd_mach_o_arm_mkobject

#define bfd_mach_o_canonicalize_one_reloc bfd_mach_o_arm_canonicalize_one_reloc
#define bfd_mach_o_swap_reloc_out  NULL
#define bfd_mach_o_bfd_reloc_type_lookup bfd_mach_o_arm_bfd_reloc_type_lookup
#define bfd_mach_o_bfd_reloc_name_lookup bfd_mach_o_arm_bfd_reloc_name_lookup

#define bfd_mach_o_print_thread NULL
#define bfd_mach_o_tgt_seg_table NULL
#define bfd_mach_o_section_type_valid_for_tgt NULL

static const bfd_target *
bfd_mach_o_arm_object_p (bfd *abfd)
{
  return bfd_mach_o_header_p (abfd, 0, 0, BFD_MACH_O_CPU_TYPE_ARM);
}

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

static bfd_boolean
bfd_mach_o_arm_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_ARM;
  mdata->header.cpusubtype = BFD_MACH_O_CPU_SUBTYPE_ARM_ALL;
  mdata->header.byteorder = BFD_ENDIAN_LITTLE;
  mdata->header.version = 1;

  return TRUE;
}

static reloc_howto_type arm_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),
  HOWTO (BFD_RELOC_ARM_PCREL_CALL, 2, 2, 24, TRUE, 0,
	 complain_overflow_signed,
	 NULL, "BR24",
	 FALSE, 0x00ffffff, 0x00ffffff, TRUE),
  /* 12 */
  HOWTO (BFD_RELOC_ARM_MOVW, 0,	2, 16, FALSE, 0,
	 complain_overflow_dont,
	 NULL, "MOVW",
	 FALSE, 0x000f0fff, 0x000f0fff, FALSE),
  HOWTO (BFD_RELOC_MACH_O_PAIR, 0, 2, 16, FALSE, 0,
	 complain_overflow_bitfield,
	 NULL, "PAIR_W",
	 FALSE, 0x000f0fff, 0x000f0fff, FALSE),
  HOWTO (BFD_RELOC_ARM_MOVT, 0, 2, 16, FALSE, 0,
	 complain_overflow_bitfield,
	 NULL, "MOVT",
	 FALSE, 0x000f0fff, 0x000f0fff, FALSE),
  HOWTO (BFD_RELOC_MACH_O_PAIR, 0, 2, 16, FALSE, 0,
	 complain_overflow_bitfield,
	 NULL, "PAIR_T",
	 FALSE, 0x000f0fff, 0x000f0fff, FALSE),
  /* 16 */
  HOWTO (BFD_RELOC_THUMB_PCREL_BLX, 2, 2, 24, TRUE, 0,
	 complain_overflow_signed,
	 NULL, "TBR22",
	 FALSE, 0x07ff2fff, 0x07ff2fff, TRUE)
};

static bfd_boolean
bfd_mach_o_arm_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_ARM_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 = &arm_howto_table[7];
	      res->address = res[-1].address;
	      return TRUE;
	    }
	  else if (reloc.r_length == 1)
	    {
	      res->howto = &arm_howto_table[10];
	      res->address = res[-1].address;
	      return TRUE;
	    }
	  return FALSE;

	case BFD_MACH_O_ARM_RELOC_SECTDIFF:
	  if (reloc.r_length == 2)
	    {
	      res->howto = &arm_howto_table[5];
	      return TRUE;
	    }
	  else if (reloc.r_length == 1)
	    {
	      res->howto = &arm_howto_table[8];
	      return TRUE;
	    }
	  return FALSE;

	case BFD_MACH_O_ARM_RELOC_LOCAL_SECTDIFF:
	  if (reloc.r_length == 2)
	    {
	      res->howto = &arm_howto_table[6];
	      return TRUE;
	    }
	  else if (reloc.r_length == 1)
	    {
	      res->howto = &arm_howto_table[9];
	      return TRUE;
	    }
	  return FALSE;

	case BFD_MACH_O_ARM_RELOC_HALF_SECTDIFF:
	  switch (reloc.r_length)
	    {
	    case 2: /* :lower16: for movw arm.  */
	      res->howto = &arm_howto_table[12];
	      return TRUE;
	    case 3: /* :upper16: for movt arm.  */
	      res->howto = &arm_howto_table[14];
	      return TRUE;
	    }
	  return FALSE;

	default:
	  break;
	}
    }
  else
    {
      switch (reloc.r_type)
	{
	case BFD_MACH_O_ARM_RELOC_VANILLA:
	  switch ((reloc.r_length << 1) | reloc.r_pcrel)
	    {
	    case 0: /* len = 0, pcrel = 0  */
	      res->howto = &arm_howto_table[2];
	      return TRUE;
	    case 2: /* len = 1, pcrel = 0  */
	      res->howto = &arm_howto_table[1];
	      return TRUE;
	    case 3: /* len = 1, pcrel = 1  */
	      res->howto = &arm_howto_table[4];
	      return TRUE;
	    case 4: /* len = 2, pcrel = 0  */
	      res->howto = &arm_howto_table[0];
	      return TRUE;
	    case 5: /* len = 2, pcrel = 1  */
	      res->howto = &arm_howto_table[3];
	      return TRUE;
	    default:
	      return FALSE;
	    }
	  break;

	case BFD_MACH_O_ARM_RELOC_BR24:
	  if (reloc.r_length == 2 && reloc.r_pcrel == 1)
	    {
	      res->howto = &arm_howto_table[11];
	      return TRUE;
	    }
	  break;

	case BFD_MACH_O_THUMB_RELOC_BR22:
	  if (reloc.r_length == 2 && reloc.r_pcrel == 1)
	    {
	      res->howto = &arm_howto_table[16];
	      return TRUE;
	    }
	  break;

	case BFD_MACH_O_ARM_RELOC_HALF:
	  if (reloc.r_pcrel == 0)
	    switch (reloc.r_length)
	      {
	      case 0: /* :lower16: for movw arm.  */
		res->howto = &arm_howto_table[12];
		return TRUE;
	      case 1: /* :upper16: for movt arm.  */
		res->howto = &arm_howto_table[14];
		return TRUE;
	      }
	  break;

	case BFD_MACH_O_ARM_RELOC_PAIR:
	  if (res[-1].howto == &arm_howto_table[12]
	      && reloc.r_length == 0)
	    {
	      /* Pair for :lower16: of movw arm.  */
	      res->howto = &arm_howto_table[13];
	      /* This reloc contains the other half in its r_address field.  */
	      res[-1].addend += (res->address & 0xffff) << 16;
	      res->address = res[-1].address;
	      return TRUE;
	    }
	  else if (res[-1].howto == &arm_howto_table[14]
		   && reloc.r_length == 1)
	    {
	      /* Pair for :upper16: of movt arm.  */
	      res->howto = &arm_howto_table[15];
	      /* This reloc contains the other half in its r_address field.  */
	      res[-1].addend += res->address & 0xffff;
	      res->address = res[-1].address;
	      return TRUE;
	    }
	  break;

	default:
	  break;
	}
    }

  return FALSE;
}

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

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

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

#define TARGET_NAME		arm_mach_o_vec
#define TARGET_STRING		"mach-o-arm"
#define TARGET_ARCHITECTURE	bfd_arch_arm
#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
f075eb5e	1	/* ARM Mach-O support for BFD.
219d1afa	2	Copyright (C) 2015-2018 Free Software Foundation, Inc.
f075eb5e TG	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 "mach-o.h"
	23	#include "bfd.h"
	24	#include "libbfd.h"
	25	#include "libiberty.h"
	26	#include "mach-o/arm.h"
	27
	28	#define bfd_mach_o_object_p bfd_mach_o_arm_object_p
	29	#define bfd_mach_o_core_p bfd_mach_o_arm_core_p
	30	#define bfd_mach_o_mkobject bfd_mach_o_arm_mkobject
	31
	32	#define bfd_mach_o_canonicalize_one_reloc bfd_mach_o_arm_canonicalize_one_reloc
ca4cf9b9	33	#define bfd_mach_o_swap_reloc_out NULL
f075eb5e TG	34	#define bfd_mach_o_bfd_reloc_type_lookup bfd_mach_o_arm_bfd_reloc_type_lookup
	35	#define bfd_mach_o_bfd_reloc_name_lookup bfd_mach_o_arm_bfd_reloc_name_lookup
	36
	37	#define bfd_mach_o_print_thread NULL
	38	#define bfd_mach_o_tgt_seg_table NULL
	39	#define bfd_mach_o_section_type_valid_for_tgt NULL
	40
	41	static const bfd_target *
	42	bfd_mach_o_arm_object_p (bfd *abfd)
	43	{
	44	return bfd_mach_o_header_p (abfd, 0, 0, BFD_MACH_O_CPU_TYPE_ARM);
	45	}
	46
	47	static const bfd_target *
	48	bfd_mach_o_arm_core_p (bfd *abfd)
	49	{
	50	return bfd_mach_o_header_p (abfd, 0,
07d6d2b8	51	BFD_MACH_O_MH_CORE, BFD_MACH_O_CPU_TYPE_ARM);
f075eb5e TG	52	}
	53
	54	static bfd_boolean
	55	bfd_mach_o_arm_mkobject (bfd *abfd)
	56	{
	57	bfd_mach_o_data_struct *mdata;
	58
	59	if (!bfd_mach_o_mkobject_init (abfd))
	60	return FALSE;
	61
	62	mdata = bfd_mach_o_get_data (abfd);
	63	mdata->header.magic = BFD_MACH_O_MH_MAGIC;
	64	mdata->header.cputype = BFD_MACH_O_CPU_TYPE_ARM;
	65	mdata->header.cpusubtype = BFD_MACH_O_CPU_SUBTYPE_ARM_ALL;
	66	mdata->header.byteorder = BFD_ENDIAN_LITTLE;
	67	mdata->header.version = 1;
	68
	69	return TRUE;
	70	}
	71
	72	static reloc_howto_type arm_howto_table[]=
	73	{
	74	/* 0 */
	75	HOWTO (BFD_RELOC_32, 0, 2, 32, FALSE, 0,
	76	complain_overflow_bitfield,
	77	NULL, "32",
	78	FALSE, 0xffffffff, 0xffffffff, FALSE),
	79	HOWTO (BFD_RELOC_16, 0, 1, 16, FALSE, 0,
	80	complain_overflow_bitfield,
	81	NULL, "16",
	82	FALSE, 0xffff, 0xffff, FALSE),
	83	HOWTO (BFD_RELOC_8, 0, 0, 8, FALSE, 0,
	84	complain_overflow_bitfield,
	85	NULL, "8",
	86	FALSE, 0xff, 0xff, FALSE),
	87	HOWTO (BFD_RELOC_32_PCREL, 0, 2, 32, TRUE, 0,
	88	complain_overflow_bitfield,
	89	NULL, "DISP32",
	90	FALSE, 0xffffffff, 0xffffffff, TRUE),
	91	/* 4 */
	92	HOWTO (BFD_RELOC_16_PCREL, 0, 1, 16, TRUE, 0,
	93	complain_overflow_bitfield,
	94	NULL, "DISP16",
	95	FALSE, 0xffff, 0xffff, TRUE),
	96	HOWTO (BFD_RELOC_MACH_O_SECTDIFF, 0, 2, 32, FALSE, 0,
	97	complain_overflow_bitfield,
	98	NULL, "SECTDIFF_32",
	99	FALSE, 0xffffffff, 0xffffffff, FALSE),
	100	HOWTO (BFD_RELOC_MACH_O_LOCAL_SECTDIFF, 0, 2, 32, FALSE, 0,
	101	complain_overflow_bitfield,
	102	NULL, "LSECTDIFF_32",
	103	FALSE, 0xffffffff, 0xffffffff, FALSE),
	104	HOWTO (BFD_RELOC_MACH_O_PAIR, 0, 2, 32, FALSE, 0,
	105	complain_overflow_bitfield,
	106	NULL, "PAIR_32",
	107	FALSE, 0xffffffff, 0xffffffff, FALSE),
	108	/* 8 */
	109	HOWTO (BFD_RELOC_MACH_O_SECTDIFF, 0, 1, 16, FALSE, 0,
	110	complain_overflow_bitfield,
	111	NULL, "SECTDIFF_16",
	112	FALSE, 0xffff, 0xffff, FALSE),
	113	HOWTO (BFD_RELOC_MACH_O_LOCAL_SECTDIFF, 0, 1, 16, FALSE, 0,
	114	complain_overflow_bitfield,
	115	NULL, "LSECTDIFF_16",
116	FALSE, 0xffff, 0xffff, FALSE),
117	HOWTO (BFD_RELOC_MACH_O_PAIR, 0, 1, 16, FALSE, 0,
118	complain_overflow_bitfield,
119	NULL, "PAIR_16",
120	FALSE, 0xffff, 0xffff, FALSE),
121	HOWTO (BFD_RELOC_ARM_PCREL_CALL, 2, 2, 24, TRUE, 0,
122	complain_overflow_signed,
123	NULL, "BR24",
124	FALSE, 0x00ffffff, 0x00ffffff, TRUE),
125	/* 12 */
126	HOWTO (BFD_RELOC_ARM_MOVW, 0, 2, 16, FALSE, 0,
127	complain_overflow_dont,
128	NULL, "MOVW",
129	FALSE, 0x000f0fff, 0x000f0fff, FALSE),
130	HOWTO (BFD_RELOC_MACH_O_PAIR, 0, 2, 16, FALSE, 0,
131	complain_overflow_bitfield,
132	NULL, "PAIR_W",
133	FALSE, 0x000f0fff, 0x000f0fff, FALSE),
134	HOWTO (BFD_RELOC_ARM_MOVT, 0, 2, 16, FALSE, 0,
135	complain_overflow_bitfield,
136	NULL, "MOVT",
137	FALSE, 0x000f0fff, 0x000f0fff, FALSE),
138	HOWTO (BFD_RELOC_MACH_O_PAIR, 0, 2, 16, FALSE, 0,
139	complain_overflow_bitfield,
140	NULL, "PAIR_T",
141	FALSE, 0x000f0fff, 0x000f0fff, FALSE),
142	/* 16 */
143	HOWTO (BFD_RELOC_THUMB_PCREL_BLX, 2, 2, 24, TRUE, 0,
144	complain_overflow_signed,
145	NULL, "TBR22",
146	FALSE, 0x07ff2fff, 0x07ff2fff, TRUE)
147	};
148
149	static bfd_boolean
ca4cf9b9 NC	150	bfd_mach_o_arm_canonicalize_one_reloc (bfd * abfd,
	151	struct mach_o_reloc_info_external * raw,
	152	arelent * res,
	153	asymbol ** syms,
	154	arelent * res_base)
0bae9e9e	155	{
f075eb5e TG	156	bfd_mach_o_reloc_info reloc;
	157
	158	if (!bfd_mach_o_pre_canonicalize_one_reloc (abfd, raw, &reloc, res, syms))
	159	return FALSE;
	160
	161	if (reloc.r_scattered)
	162	{
	163	switch (reloc.r_type)
07d6d2b8 AM	164	{
07d6d2b8 AM	165	case BFD_MACH_O_ARM_RELOC_PAIR:
ca4cf9b9 NC	166	/* PR 21813: Check for a corrupt PAIR reloc at the start. */
	167	if (res == res_base)
	168	return FALSE;
07d6d2b8 AM	169	if (reloc.r_length == 2)
07d6d2b8 AM	170	{
f075eb5e TG	171	res->howto = &arm_howto_table[7];
	172	res->address = res[-1].address;
	173	return TRUE;
07d6d2b8 AM	174	}
07d6d2b8 AM	175	else if (reloc.r_length == 1)
f075eb5e TG	176	{
	177	res->howto = &arm_howto_table[10];
	178	res->address = res[-1].address;
	179	return TRUE;
	180	}
07d6d2b8	181	return FALSE;
0bae9e9e	182
07d6d2b8 AM	183	case BFD_MACH_O_ARM_RELOC_SECTDIFF:
	184	if (reloc.r_length == 2)
	185	{
f075eb5e TG	186	res->howto = &arm_howto_table[5];
f075eb5e TG	187	return TRUE;
07d6d2b8 AM	188	}
	189	else if (reloc.r_length == 1)
	190	{
f075eb5e TG	191	res->howto = &arm_howto_table[8];
f075eb5e TG	192	return TRUE;
07d6d2b8 AM	193	}
07d6d2b8 AM	194	return FALSE;
0bae9e9e	195
07d6d2b8 AM	196	case BFD_MACH_O_ARM_RELOC_LOCAL_SECTDIFF:
	197	if (reloc.r_length == 2)
	198	{
f075eb5e TG	199	res->howto = &arm_howto_table[6];
f075eb5e TG	200	return TRUE;
07d6d2b8 AM	201	}
	202	else if (reloc.r_length == 1)
	203	{
f075eb5e TG	204	res->howto = &arm_howto_table[9];
f075eb5e TG	205	return TRUE;
07d6d2b8 AM	206	}
07d6d2b8 AM	207	return FALSE;
0bae9e9e	208
f075eb5e TG	209	case BFD_MACH_O_ARM_RELOC_HALF_SECTDIFF:
	210	switch (reloc.r_length)
	211	{
	212	case 2: /* :lower16: for movw arm. */
	213	res->howto = &arm_howto_table[12];
	214	return TRUE;
	215	case 3: /* :upper16: for movt arm. */
	216	res->howto = &arm_howto_table[14];
	217	return TRUE;
	218	}
	219	return FALSE;
0bae9e9e	220
07d6d2b8 AM	221	default:
	222	break;
	223	}
f075eb5e TG	224	}
	225	else
	226	{
	227	switch (reloc.r_type)
07d6d2b8 AM	228	{
	229	case BFD_MACH_O_ARM_RELOC_VANILLA:
	230	switch ((reloc.r_length << 1) \| reloc.r_pcrel)
	231	{
	232	case 0: /* len = 0, pcrel = 0 */
	233	res->howto = &arm_howto_table[2];
	234	return TRUE;
	235	case 2: /* len = 1, pcrel = 0 */
	236	res->howto = &arm_howto_table[1];
	237	return TRUE;
	238	case 3: /* len = 1, pcrel = 1 */
	239	res->howto = &arm_howto_table[4];
	240	return TRUE;
	241	case 4: /* len = 2, pcrel = 0 */
	242	res->howto = &arm_howto_table[0];
	243	return TRUE;
	244	case 5: /* len = 2, pcrel = 1 */
	245	res->howto = &arm_howto_table[3];
	246	return TRUE;
	247	default:
	248	return FALSE;
	249	}
	250	break;
	251
	252	case BFD_MACH_O_ARM_RELOC_BR24:
f075eb5e TG	253	if (reloc.r_length == 2 && reloc.r_pcrel == 1)
f075eb5e TG	254	{
07d6d2b8 AM	255	res->howto = &arm_howto_table[11];
07d6d2b8 AM	256	return TRUE;
f075eb5e	257	}
f075eb5e	258	break;
0bae9e9e	259
07d6d2b8	260	case BFD_MACH_O_THUMB_RELOC_BR22:
f075eb5e TG	261	if (reloc.r_length == 2 && reloc.r_pcrel == 1)
f075eb5e TG	262	{
07d6d2b8 AM	263	res->howto = &arm_howto_table[16];
07d6d2b8 AM	264	return TRUE;
f075eb5e	265	}
f075eb5e	266	break;
0bae9e9e	267
07d6d2b8	268	case BFD_MACH_O_ARM_RELOC_HALF:
f075eb5e TG	269	if (reloc.r_pcrel == 0)
	270	switch (reloc.r_length)
	271	{
	272	case 0: /* :lower16: for movw arm. */
	273	res->howto = &arm_howto_table[12];
	274	return TRUE;
	275	case 1: /* :upper16: for movt arm. */
	276	res->howto = &arm_howto_table[14];
	277	return TRUE;
	278	}
0bae9e9e NC	279	break;
0bae9e9e NC	280
07d6d2b8	281	case BFD_MACH_O_ARM_RELOC_PAIR:
f075eb5e TG	282	if (res[-1].howto == &arm_howto_table[12]
	283	&& reloc.r_length == 0)
	284	{
	285	/* Pair for :lower16: of movw arm. */
	286	res->howto = &arm_howto_table[13];
	287	/* This reloc contains the other half in its r_address field. */
	288	res[-1].addend += (res->address & 0xffff) << 16;
	289	res->address = res[-1].address;
	290	return TRUE;
07d6d2b8	291	}
f075eb5e TG	292	else if (res[-1].howto == &arm_howto_table[14]
	293	&& reloc.r_length == 1)
	294	{
	295	/* Pair for :upper16: of movt arm. */
	296	res->howto = &arm_howto_table[15];
	297	/* This reloc contains the other half in its r_address field. */
	298	res[-1].addend += res->address & 0xffff;
	299	res->address = res[-1].address;
	300	return TRUE;
07d6d2b8	301	}
0bae9e9e NC	302	break;
0bae9e9e NC	303
07d6d2b8	304	default:
0bae9e9e	305	break;
07d6d2b8	306	}
f075eb5e	307	}
0bae9e9e NC	308
0bae9e9e NC	309	return FALSE;
f075eb5e TG	310	}
	311
	312	static reloc_howto_type *
	313	bfd_mach_o_arm_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
	314	bfd_reloc_code_real_type code)
	315	{
	316	unsigned int i;
	317
	318	for (i = 0; i < sizeof (arm_howto_table) / sizeof (*arm_howto_table); i++)
	319	if (code == arm_howto_table[i].type)
	320	return &arm_howto_table[i];
	321	return NULL;
	322	}
	323
	324	static reloc_howto_type *
	325	bfd_mach_o_arm_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
	326	const char *name ATTRIBUTE_UNUSED)
	327	{
	328	return NULL;
	329	}
	330
07d6d2b8 AM	331	#define TARGET_NAME arm_mach_o_vec
07d6d2b8 AM	332	#define TARGET_STRING "mach-o-arm"
f075eb5e TG	333	#define TARGET_ARCHITECTURE bfd_arch_arm
f075eb5e TG	334	#define TARGET_PAGESIZE 4096
07d6d2b8 AM	335	#define TARGET_BIG_ENDIAN 0
07d6d2b8 AM	336	#define TARGET_ARCHIVE 0
f075eb5e TG	337	#define TARGET_PRIORITY 0
f075eb5e TG	338	#include "mach-o-target.c"