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

/* ARM Mach-O support for BFD.
   Copyright (C) 2015-2017 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)
{
  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:
          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.
2571583a	2	Copyright (C) 2015-2017 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
	33	#define bfd_mach_o_swap_reloc_out NULL
	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,
	51	BFD_MACH_O_MH_CORE, BFD_MACH_O_CPU_TYPE_ARM);
	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
150	bfd_mach_o_arm_canonicalize_one_reloc (bfd *abfd,
151	struct mach_o_reloc_info_external *raw,
152	arelent res, asymbol *syms)
0bae9e9e	153	{
f075eb5e TG	154	bfd_mach_o_reloc_info reloc;
	155
	156	if (!bfd_mach_o_pre_canonicalize_one_reloc (abfd, raw, &reloc, res, syms))
	157	return FALSE;
	158
	159	if (reloc.r_scattered)
	160	{
	161	switch (reloc.r_type)
	162	{
	163	case BFD_MACH_O_ARM_RELOC_PAIR:
	164	if (reloc.r_length == 2)
	165	{
	166	res->howto = &arm_howto_table[7];
	167	res->address = res[-1].address;
	168	return TRUE;
	169	}
	170	else if (reloc.r_length == 1)
	171	{
	172	res->howto = &arm_howto_table[10];
	173	res->address = res[-1].address;
	174	return TRUE;
	175	}
	176	return FALSE;
0bae9e9e	177
f075eb5e TG	178	case BFD_MACH_O_ARM_RELOC_SECTDIFF:
	179	if (reloc.r_length == 2)
	180	{
	181	res->howto = &arm_howto_table[5];
	182	return TRUE;
	183	}
	184	else if (reloc.r_length == 1)
	185	{
	186	res->howto = &arm_howto_table[8];
	187	return TRUE;
	188	}
	189	return FALSE;
0bae9e9e	190
f075eb5e TG	191	case BFD_MACH_O_ARM_RELOC_LOCAL_SECTDIFF:
	192	if (reloc.r_length == 2)
	193	{
	194	res->howto = &arm_howto_table[6];
	195	return TRUE;
	196	}
	197	else if (reloc.r_length == 1)
	198	{
	199	res->howto = &arm_howto_table[9];
	200	return TRUE;
	201	}
	202	return FALSE;
0bae9e9e	203
f075eb5e TG	204	case BFD_MACH_O_ARM_RELOC_HALF_SECTDIFF:
	205	switch (reloc.r_length)
	206	{
	207	case 2: /* :lower16: for movw arm. */
	208	res->howto = &arm_howto_table[12];
	209	return TRUE;
	210	case 3: /* :upper16: for movt arm. */
	211	res->howto = &arm_howto_table[14];
	212	return TRUE;
	213	}
	214	return FALSE;
0bae9e9e	215
f075eb5e	216	default:
0bae9e9e	217	break;
f075eb5e TG	218	}
	219	}
	220	else
	221	{
	222	switch (reloc.r_type)
	223	{
	224	case BFD_MACH_O_ARM_RELOC_VANILLA:
	225	switch ((reloc.r_length << 1) \| reloc.r_pcrel)
	226	{
	227	case 0: /* len = 0, pcrel = 0 */
	228	res->howto = &arm_howto_table[2];
	229	return TRUE;
	230	case 2: /* len = 1, pcrel = 0 */
	231	res->howto = &arm_howto_table[1];
	232	return TRUE;
	233	case 3: /* len = 1, pcrel = 1 */
	234	res->howto = &arm_howto_table[4];
	235	return TRUE;
	236	case 4: /* len = 2, pcrel = 0 */
	237	res->howto = &arm_howto_table[0];
	238	return TRUE;
	239	case 5: /* len = 2, pcrel = 1 */
	240	res->howto = &arm_howto_table[3];
	241	return TRUE;
	242	default:
	243	return FALSE;
	244	}
	245	break;
0bae9e9e	246
f075eb5e TG	247	case BFD_MACH_O_ARM_RELOC_BR24:
	248	if (reloc.r_length == 2 && reloc.r_pcrel == 1)
	249	{
	250	res->howto = &arm_howto_table[11];
	251	return TRUE;
	252	}
f075eb5e	253	break;
0bae9e9e	254
f075eb5e TG	255	case BFD_MACH_O_THUMB_RELOC_BR22:
	256	if (reloc.r_length == 2 && reloc.r_pcrel == 1)
	257	{
	258	res->howto = &arm_howto_table[16];
	259	return TRUE;
	260	}
f075eb5e	261	break;
0bae9e9e	262
f075eb5e TG	263	case BFD_MACH_O_ARM_RELOC_HALF:
	264	if (reloc.r_pcrel == 0)
	265	switch (reloc.r_length)
	266	{
	267	case 0: /* :lower16: for movw arm. */
	268	res->howto = &arm_howto_table[12];
	269	return TRUE;
	270	case 1: /* :upper16: for movt arm. */
	271	res->howto = &arm_howto_table[14];
	272	return TRUE;
	273	}
0bae9e9e NC	274	break;
0bae9e9e NC	275
f075eb5e TG	276	case BFD_MACH_O_ARM_RELOC_PAIR:
	277	if (res[-1].howto == &arm_howto_table[12]
	278	&& reloc.r_length == 0)
	279	{
	280	/* Pair for :lower16: of movw arm. */
	281	res->howto = &arm_howto_table[13];
	282	/* This reloc contains the other half in its r_address field. */
	283	res[-1].addend += (res->address & 0xffff) << 16;
	284	res->address = res[-1].address;
	285	return TRUE;
	286	}
	287	else if (res[-1].howto == &arm_howto_table[14]
	288	&& reloc.r_length == 1)
	289	{
	290	/* Pair for :upper16: of movt arm. */
	291	res->howto = &arm_howto_table[15];
	292	/* This reloc contains the other half in its r_address field. */
	293	res[-1].addend += res->address & 0xffff;
	294	res->address = res[-1].address;
	295	return TRUE;
	296	}
0bae9e9e NC	297	break;
0bae9e9e NC	298
f075eb5e	299	default:
0bae9e9e	300	break;
f075eb5e TG	301	}
f075eb5e TG	302	}
0bae9e9e NC	303
0bae9e9e NC	304	return FALSE;
f075eb5e TG	305	}
	306
	307	static reloc_howto_type *
	308	bfd_mach_o_arm_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
	309	bfd_reloc_code_real_type code)
	310	{
	311	unsigned int i;
	312
	313	for (i = 0; i < sizeof (arm_howto_table) / sizeof (*arm_howto_table); i++)
	314	if (code == arm_howto_table[i].type)
	315	return &arm_howto_table[i];
	316	return NULL;
	317	}
	318
	319	static reloc_howto_type *
	320	bfd_mach_o_arm_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
	321	const char *name ATTRIBUTE_UNUSED)
	322	{
	323	return NULL;
	324	}
	325
	326	#define TARGET_NAME arm_mach_o_vec
	327	#define TARGET_STRING "mach-o-arm"
	328	#define TARGET_ARCHITECTURE bfd_arch_arm
	329	#define TARGET_PAGESIZE 4096
	330	#define TARGET_BIG_ENDIAN 0
	331	#define TARGET_ARCHIVE 0
	332	#define TARGET_PRIORITY 0
	333	#include "mach-o-target.c"