1 /* ARM Mach-O support for BFD.
2 Copyright (C) 2015-2017 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
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.
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.
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. */
25 #include "libiberty.h"
26 #include "mach-o/arm.h"
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
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
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
41 static const bfd_target *
42 bfd_mach_o_arm_object_p (bfd *abfd)
44 return bfd_mach_o_header_p (abfd, 0, 0, BFD_MACH_O_CPU_TYPE_ARM);
47 static const bfd_target *
48 bfd_mach_o_arm_core_p (bfd *abfd)
50 return bfd_mach_o_header_p (abfd, 0,
51 BFD_MACH_O_MH_CORE, BFD_MACH_O_CPU_TYPE_ARM);
55 bfd_mach_o_arm_mkobject (bfd *abfd)
57 bfd_mach_o_data_struct *mdata;
59 if (!bfd_mach_o_mkobject_init (abfd))
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;
72 static reloc_howto_type arm_howto_table[]=
75 HOWTO (BFD_RELOC_32, 0, 2, 32, FALSE, 0,
76 complain_overflow_bitfield,
78 FALSE, 0xffffffff, 0xffffffff, FALSE),
79 HOWTO (BFD_RELOC_16, 0, 1, 16, FALSE, 0,
80 complain_overflow_bitfield,
82 FALSE, 0xffff, 0xffff, FALSE),
83 HOWTO (BFD_RELOC_8, 0, 0, 8, FALSE, 0,
84 complain_overflow_bitfield,
86 FALSE, 0xff, 0xff, FALSE),
87 HOWTO (BFD_RELOC_32_PCREL, 0, 2, 32, TRUE, 0,
88 complain_overflow_bitfield,
90 FALSE, 0xffffffff, 0xffffffff, TRUE),
92 HOWTO (BFD_RELOC_16_PCREL, 0, 1, 16, TRUE, 0,
93 complain_overflow_bitfield,
95 FALSE, 0xffff, 0xffff, TRUE),
96 HOWTO (BFD_RELOC_MACH_O_SECTDIFF, 0, 2, 32, FALSE, 0,
97 complain_overflow_bitfield,
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,
107 FALSE, 0xffffffff, 0xffffffff, FALSE),
109 HOWTO (BFD_RELOC_MACH_O_SECTDIFF, 0, 1, 16, FALSE, 0,
110 complain_overflow_bitfield,
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,
120 FALSE, 0xffff, 0xffff, FALSE),
121 HOWTO (BFD_RELOC_ARM_PCREL_CALL, 2, 2, 24, TRUE, 0,
122 complain_overflow_signed,
124 FALSE, 0x00ffffff, 0x00ffffff, TRUE),
126 HOWTO (BFD_RELOC_ARM_MOVW, 0, 2, 16, FALSE, 0,
127 complain_overflow_dont,
129 FALSE, 0x000f0fff, 0x000f0fff, FALSE),
130 HOWTO (BFD_RELOC_MACH_O_PAIR, 0, 2, 16, FALSE, 0,
131 complain_overflow_bitfield,
133 FALSE, 0x000f0fff, 0x000f0fff, FALSE),
134 HOWTO (BFD_RELOC_ARM_MOVT, 0, 2, 16, FALSE, 0,
135 complain_overflow_bitfield,
137 FALSE, 0x000f0fff, 0x000f0fff, FALSE),
138 HOWTO (BFD_RELOC_MACH_O_PAIR, 0, 2, 16, FALSE, 0,
139 complain_overflow_bitfield,
141 FALSE, 0x000f0fff, 0x000f0fff, FALSE),
143 HOWTO (BFD_RELOC_THUMB_PCREL_BLX, 2, 2, 24, TRUE, 0,
144 complain_overflow_signed,
146 FALSE, 0x07ff2fff, 0x07ff2fff, TRUE)
150 bfd_mach_o_arm_canonicalize_one_reloc (bfd *abfd,
151 struct mach_o_reloc_info_external *raw,
152 arelent *res, asymbol **syms)
154 bfd_mach_o_reloc_info reloc;
156 if (!bfd_mach_o_pre_canonicalize_one_reloc (abfd, raw, &reloc, res, syms))
159 if (reloc.r_scattered)
161 switch (reloc.r_type)
163 case BFD_MACH_O_ARM_RELOC_PAIR:
164 if (reloc.r_length == 2)
166 res->howto = &arm_howto_table[7];
167 res->address = res[-1].address;
170 else if (reloc.r_length == 1)
172 res->howto = &arm_howto_table[10];
173 res->address = res[-1].address;
178 case BFD_MACH_O_ARM_RELOC_SECTDIFF:
179 if (reloc.r_length == 2)
181 res->howto = &arm_howto_table[5];
184 else if (reloc.r_length == 1)
186 res->howto = &arm_howto_table[8];
191 case BFD_MACH_O_ARM_RELOC_LOCAL_SECTDIFF:
192 if (reloc.r_length == 2)
194 res->howto = &arm_howto_table[6];
197 else if (reloc.r_length == 1)
199 res->howto = &arm_howto_table[9];
204 case BFD_MACH_O_ARM_RELOC_HALF_SECTDIFF:
205 switch (reloc.r_length)
207 case 2: /* :lower16: for movw arm. */
208 res->howto = &arm_howto_table[12];
210 case 3: /* :upper16: for movt arm. */
211 res->howto = &arm_howto_table[14];
222 switch (reloc.r_type)
224 case BFD_MACH_O_ARM_RELOC_VANILLA:
225 switch ((reloc.r_length << 1) | reloc.r_pcrel)
227 case 0: /* len = 0, pcrel = 0 */
228 res->howto = &arm_howto_table[2];
230 case 2: /* len = 1, pcrel = 0 */
231 res->howto = &arm_howto_table[1];
233 case 3: /* len = 1, pcrel = 1 */
234 res->howto = &arm_howto_table[4];
236 case 4: /* len = 2, pcrel = 0 */
237 res->howto = &arm_howto_table[0];
239 case 5: /* len = 2, pcrel = 1 */
240 res->howto = &arm_howto_table[3];
247 case BFD_MACH_O_ARM_RELOC_BR24:
248 if (reloc.r_length == 2 && reloc.r_pcrel == 1)
250 res->howto = &arm_howto_table[11];
255 case BFD_MACH_O_THUMB_RELOC_BR22:
256 if (reloc.r_length == 2 && reloc.r_pcrel == 1)
258 res->howto = &arm_howto_table[16];
263 case BFD_MACH_O_ARM_RELOC_HALF:
264 if (reloc.r_pcrel == 0)
265 switch (reloc.r_length)
267 case 0: /* :lower16: for movw arm. */
268 res->howto = &arm_howto_table[12];
270 case 1: /* :upper16: for movt arm. */
271 res->howto = &arm_howto_table[14];
276 case BFD_MACH_O_ARM_RELOC_PAIR:
277 if (res[-1].howto == &arm_howto_table[12]
278 && reloc.r_length == 0)
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;
287 else if (res[-1].howto == &arm_howto_table[14]
288 && reloc.r_length == 1)
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;
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)
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];
319 static reloc_howto_type *
320 bfd_mach_o_arm_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
321 const char *name ATTRIBUTE_UNUSED)
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"