1 /* Intel x86-64 Mach-O support for BFD.
2 Copyright (C) 2010-2014 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 "mach-o.h"
23 #include "bfd.h"
24 #include "libbfd.h"
25 #include "libiberty.h"
26 #include "mach-o/x86-64.h"
27
28 #define bfd_mach_o_object_p bfd_mach_o_x86_64_object_p
29 #define bfd_mach_o_core_p bfd_mach_o_x86_64_core_p
30 #define bfd_mach_o_mkobject bfd_mach_o_x86_64_mkobject
31
32 static const bfd_target *
bfd_mach_o_x86_64_object_p(bfd * abfd)33 bfd_mach_o_x86_64_object_p (bfd *abfd)
34 {
35 return bfd_mach_o_header_p (abfd, 0, BFD_MACH_O_CPU_TYPE_X86_64);
36 }
37
38 static const bfd_target *
bfd_mach_o_x86_64_core_p(bfd * abfd)39 bfd_mach_o_x86_64_core_p (bfd *abfd)
40 {
41 return bfd_mach_o_header_p (abfd,
42 BFD_MACH_O_MH_CORE, BFD_MACH_O_CPU_TYPE_X86_64);
43 }
44
45 static bfd_boolean
bfd_mach_o_x86_64_mkobject(bfd * abfd)46 bfd_mach_o_x86_64_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_64;
55 mdata->header.cputype = BFD_MACH_O_CPU_TYPE_X86_64;
56 mdata->header.cpusubtype =
57 BFD_MACH_O_CPU_SUBTYPE_X86_ALL | BFD_MACH_O_CPU_SUBTYPE_LIB64;
58 mdata->header.byteorder = BFD_ENDIAN_LITTLE;
59 mdata->header.version = 2;
60
61 return TRUE;
62 }
63
64 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
65 #define MINUS_ONE (~ (bfd_vma) 0)
66
67 static reloc_howto_type x86_64_howto_table[]=
68 {
69 /* 0 */
70 HOWTO(BFD_RELOC_64, 0, 4, 64, FALSE, 0,
71 complain_overflow_bitfield,
72 NULL, "64",
73 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
74 HOWTO(BFD_RELOC_32, 0, 2, 32, FALSE, 0,
75 complain_overflow_bitfield,
76 NULL, "32",
77 FALSE, 0xffffffff, 0xffffffff, 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 HOWTO(BFD_RELOC_MACH_O_X86_64_PCREL32_1, 0, 2, 32, TRUE, 0,
83 complain_overflow_bitfield,
84 NULL, "DISP32_1",
85 FALSE, 0xffffffff, 0xffffffff, TRUE),
86 /* 4 */
87 HOWTO(BFD_RELOC_MACH_O_X86_64_PCREL32_2, 0, 2, 32, TRUE, 0,
88 complain_overflow_bitfield,
89 NULL, "DISP32_2",
90 FALSE, 0xffffffff, 0xffffffff, TRUE),
91 HOWTO(BFD_RELOC_MACH_O_X86_64_PCREL32_4, 0, 2, 32, TRUE, 0,
92 complain_overflow_bitfield,
93 NULL, "DISP32_4",
94 FALSE, 0xffffffff, 0xffffffff, TRUE),
95 HOWTO(BFD_RELOC_MACH_O_X86_64_BRANCH32, 0, 2, 32, TRUE, 0,
96 complain_overflow_bitfield,
97 NULL, "BRANCH32",
98 FALSE, 0xffffffff, 0xffffffff, TRUE),
99 HOWTO(BFD_RELOC_MACH_O_X86_64_GOT_LOAD, 0, 2, 32, TRUE, 0,
100 complain_overflow_bitfield,
101 NULL, "GOT_LOAD",
102 FALSE, 0xffffffff, 0xffffffff, TRUE),
103 /* 8 */
104 HOWTO(BFD_RELOC_MACH_O_X86_64_SUBTRACTOR32, 0, 2, 32, FALSE, 0,
105 complain_overflow_bitfield,
106 NULL, "SUBTRACTOR32",
107 FALSE, 0xffffffff, 0xffffffff, FALSE),
108 HOWTO(BFD_RELOC_MACH_O_X86_64_SUBTRACTOR64, 0, 4, 64, FALSE, 0,
109 complain_overflow_bitfield,
110 NULL, "SUBTRACTOR64",
111 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
112 HOWTO(BFD_RELOC_MACH_O_X86_64_GOT, 0, 2, 32, TRUE, 0,
113 complain_overflow_bitfield,
114 NULL, "GOT",
115 FALSE, 0xffffffff, 0xffffffff, TRUE),
116 HOWTO(BFD_RELOC_MACH_O_X86_64_BRANCH8, 0, 0, 8, TRUE, 0,
117 complain_overflow_bitfield,
118 NULL, "BRANCH8",
119 FALSE, 0xff, 0xff, TRUE),
120 };
121
122 static bfd_boolean
bfd_mach_o_x86_64_swap_reloc_in(arelent * res,bfd_mach_o_reloc_info * reloc)123 bfd_mach_o_x86_64_swap_reloc_in (arelent *res, bfd_mach_o_reloc_info *reloc)
124 {
125 /* On x86-64, scattered relocs are not used. */
126 if (reloc->r_scattered)
127 return FALSE;
128
129 switch (reloc->r_type)
130 {
131 case BFD_MACH_O_X86_64_RELOC_UNSIGNED:
132 if (reloc->r_pcrel)
133 return FALSE;
134 switch (reloc->r_length)
135 {
136 case 2:
137 res->howto = &x86_64_howto_table[1];
138 return TRUE;
139 case 3:
140 res->howto = &x86_64_howto_table[0];
141 return TRUE;
142 default:
143 return FALSE;
144 }
145 case BFD_MACH_O_X86_64_RELOC_SIGNED:
146 if (reloc->r_length == 2 && reloc->r_pcrel)
147 {
148 res->howto = &x86_64_howto_table[2];
149 return TRUE;
150 }
151 break;
152 case BFD_MACH_O_X86_64_RELOC_BRANCH:
153 if (!reloc->r_pcrel)
154 return FALSE;
155 switch (reloc->r_length)
156 {
157 case 2:
158 res->howto = &x86_64_howto_table[6];
159 return TRUE;
160 default:
161 return FALSE;
162 }
163 break;
164 case BFD_MACH_O_X86_64_RELOC_GOT_LOAD:
165 if (reloc->r_length == 2 && reloc->r_pcrel && reloc->r_extern)
166 {
167 res->howto = &x86_64_howto_table[7];
168 return TRUE;
169 }
170 break;
171 case BFD_MACH_O_X86_64_RELOC_GOT:
172 if (reloc->r_length == 2 && reloc->r_pcrel && reloc->r_extern)
173 {
174 res->howto = &x86_64_howto_table[10];
175 return TRUE;
176 }
177 break;
178 case BFD_MACH_O_X86_64_RELOC_SUBTRACTOR:
179 if (reloc->r_pcrel)
180 return FALSE;
181 switch (reloc->r_length)
182 {
183 case 2:
184 res->howto = &x86_64_howto_table[8];
185 return TRUE;
186 case 3:
187 res->howto = &x86_64_howto_table[9];
188 return TRUE;
189 default:
190 return FALSE;
191 }
192 break;
193 case BFD_MACH_O_X86_64_RELOC_SIGNED_1:
194 if (reloc->r_length == 2 && reloc->r_pcrel)
195 {
196 res->howto = &x86_64_howto_table[3];
197 return TRUE;
198 }
199 break;
200 case BFD_MACH_O_X86_64_RELOC_SIGNED_2:
201 if (reloc->r_length == 2 && reloc->r_pcrel)
202 {
203 res->howto = &x86_64_howto_table[4];
204 return TRUE;
205 }
206 break;
207 case BFD_MACH_O_X86_64_RELOC_SIGNED_4:
208 if (reloc->r_length == 2 && reloc->r_pcrel)
209 {
210 res->howto = &x86_64_howto_table[5];
211 return TRUE;
212 }
213 break;
214 default:
215 return FALSE;
216 }
217 return FALSE;
218 }
219
220 static bfd_boolean
bfd_mach_o_x86_64_swap_reloc_out(arelent * rel,bfd_mach_o_reloc_info * rinfo)221 bfd_mach_o_x86_64_swap_reloc_out (arelent *rel, bfd_mach_o_reloc_info *rinfo)
222 {
223 rinfo->r_address = rel->address;
224 rinfo->r_scattered = 0;
225 switch (rel->howto->type)
226 {
227 case BFD_RELOC_32:
228 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_UNSIGNED;
229 rinfo->r_pcrel = 0;
230 rinfo->r_length = 2;
231 break;
232 case BFD_RELOC_64:
233 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_UNSIGNED;
234 rinfo->r_pcrel = 0;
235 rinfo->r_length = 3;
236 break;
237 case BFD_RELOC_32_PCREL:
238 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SIGNED;
239 rinfo->r_pcrel = 1;
240 rinfo->r_length = 2;
241 break;
242 case BFD_RELOC_MACH_O_X86_64_PCREL32_1:
243 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SIGNED_1;
244 rinfo->r_pcrel = 1;
245 rinfo->r_length = 2;
246 break;
247 case BFD_RELOC_MACH_O_X86_64_PCREL32_2:
248 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SIGNED_2;
249 rinfo->r_pcrel = 1;
250 rinfo->r_length = 2;
251 break;
252 case BFD_RELOC_MACH_O_X86_64_PCREL32_4:
253 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SIGNED_4;
254 rinfo->r_pcrel = 1;
255 rinfo->r_length = 2;
256 break;
257 case BFD_RELOC_MACH_O_X86_64_BRANCH32:
258 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_BRANCH;
259 rinfo->r_pcrel = 1;
260 rinfo->r_length = 2;
261 break;
262 case BFD_RELOC_MACH_O_X86_64_SUBTRACTOR32:
263 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SUBTRACTOR;
264 rinfo->r_pcrel = 0;
265 rinfo->r_length = 2;
266 break;
267 case BFD_RELOC_MACH_O_X86_64_SUBTRACTOR64:
268 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_SUBTRACTOR;
269 rinfo->r_pcrel = 0;
270 rinfo->r_length = 3;
271 break;
272 case BFD_RELOC_MACH_O_X86_64_GOT:
273 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_GOT;
274 rinfo->r_pcrel = 1;
275 rinfo->r_length = 2;
276 break;
277 case BFD_RELOC_MACH_O_X86_64_GOT_LOAD:
278 rinfo->r_type = BFD_MACH_O_X86_64_RELOC_GOT_LOAD;
279 rinfo->r_pcrel = 1;
280 rinfo->r_length = 2;
281 break;
282 default:
283 return FALSE;
284 }
285 if ((*rel->sym_ptr_ptr)->flags & BSF_SECTION_SYM)
286 {
287 rinfo->r_extern = 0;
288 rinfo->r_value =
289 (*rel->sym_ptr_ptr)->section->output_section->target_index;
290 }
291 else
292 {
293 rinfo->r_extern = 1;
294 rinfo->r_value = (*rel->sym_ptr_ptr)->udata.i;
295 }
296 return TRUE;
297 }
298
299 static reloc_howto_type *
bfd_mach_o_x86_64_bfd_reloc_type_lookup(bfd * abfd ATTRIBUTE_UNUSED,bfd_reloc_code_real_type code)300 bfd_mach_o_x86_64_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
301 bfd_reloc_code_real_type code)
302 {
303 unsigned int i;
304
305 for (i = 0;
306 i < sizeof (x86_64_howto_table) / sizeof (*x86_64_howto_table);
307 i++)
308 if (code == x86_64_howto_table[i].type)
309 return &x86_64_howto_table[i];
310 return NULL;
311 }
312
313 static reloc_howto_type *
bfd_mach_o_x86_64_bfd_reloc_name_lookup(bfd * abfd ATTRIBUTE_UNUSED,const char * name ATTRIBUTE_UNUSED)314 bfd_mach_o_x86_64_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
315 const char *name ATTRIBUTE_UNUSED)
316 {
317 return NULL;
318 }
319
320 static bfd_boolean
bfd_mach_o_section_type_valid_for_x86_64(unsigned long val)321 bfd_mach_o_section_type_valid_for_x86_64 (unsigned long val)
322 {
323 if (val == BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS
324 || val == BFD_MACH_O_S_LAZY_SYMBOL_POINTERS
325 || val == BFD_MACH_O_S_SYMBOL_STUBS)
326 return FALSE;
327 return TRUE;
328 }
329
330 /* We want to bump the alignment of some sections. */
331 static const mach_o_section_name_xlat text_section_names_xlat[] =
332 {
333 { ".eh_frame", "__eh_frame",
334 SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_COALESCED,
335 BFD_MACH_O_S_ATTR_LIVE_SUPPORT
336 | BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS
337 | BFD_MACH_O_S_ATTR_NO_TOC, 3},
338 { NULL, NULL, 0, 0, 0, 0}
339 };
340
341 const mach_o_segment_name_xlat mach_o_x86_64_segsec_names_xlat[] =
342 {
343 { "__TEXT", text_section_names_xlat },
344 { NULL, NULL }
345 };
346
347 #define bfd_mach_o_swap_reloc_in bfd_mach_o_x86_64_swap_reloc_in
348 #define bfd_mach_o_swap_reloc_out bfd_mach_o_x86_64_swap_reloc_out
349
350 #define bfd_mach_o_bfd_reloc_type_lookup bfd_mach_o_x86_64_bfd_reloc_type_lookup
351 #define bfd_mach_o_bfd_reloc_name_lookup bfd_mach_o_x86_64_bfd_reloc_name_lookup
352 #define bfd_mach_o_print_thread NULL
353 #define bfd_mach_o_tgt_seg_table mach_o_x86_64_segsec_names_xlat
354 #define bfd_mach_o_section_type_valid_for_tgt bfd_mach_o_section_type_valid_for_x86_64
355
356 #define TARGET_NAME x86_64_mach_o_vec
357 #define TARGET_STRING "mach-o-x86-64"
358 #define TARGET_ARCHITECTURE bfd_arch_i386
359 #define TARGET_PAGESIZE 4096
360 #define TARGET_BIG_ENDIAN 0
361 #define TARGET_ARCHIVE 0
362 #define TARGET_PRIORITY 0
363 #include "mach-o-target.c"
364