Commit | Line | Data |
---|---|---|
2469cfa2 | 1 | /* MSP430-specific support for 32-bit ELF |
b90efa5b | 2 | Copyright (C) 2002-2015 Free Software Foundation, Inc. |
2469cfa2 NC |
3 | Contributed by Dmitry Diky <diwil@mail.ru> |
4 | ||
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 9 | the Free Software Foundation; either version 3 of the License, or |
2469cfa2 NC |
10 | (at your option) any later version. |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
cd123cb7 NC |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
20 | MA 02110-1301, USA. */ | |
2469cfa2 | 21 | |
2469cfa2 | 22 | #include "sysdep.h" |
3db64b00 | 23 | #include "bfd.h" |
2469cfa2 NC |
24 | #include "libiberty.h" |
25 | #include "libbfd.h" | |
26 | #include "elf-bfd.h" | |
27 | #include "elf/msp430.h" | |
28 | ||
1ade7175 NC |
29 | static bfd_reloc_status_type |
30 | rl78_sym_diff_handler (bfd * abfd, | |
31 | arelent * reloc, | |
32 | asymbol * sym ATTRIBUTE_UNUSED, | |
33 | void * addr ATTRIBUTE_UNUSED, | |
34 | asection * input_sec, | |
35 | bfd * out_bfd ATTRIBUTE_UNUSED, | |
36 | char ** error_message ATTRIBUTE_UNUSED) | |
37 | { | |
38 | bfd_size_type octets; | |
39 | octets = reloc->address * bfd_octets_per_byte (abfd); | |
40 | ||
41 | /* Catch the case where bfd_install_relocation would return | |
42 | bfd_reloc_outofrange because the SYM_DIFF reloc is being used in a very | |
43 | small section. It does not actually matter if this happens because all | |
44 | that SYM_DIFF does is compute a (4-byte) value. A second reloc then uses | |
45 | this value, and it is that reloc that must fit into the section. | |
46 | ||
47 | This happens in eg, gcc/testsuite/gcc.c-torture/compile/labels-3.c. */ | |
48 | if ((octets + bfd_get_reloc_size (reloc->howto)) | |
49 | > bfd_get_section_limit_octets (abfd, input_sec)) | |
50 | return bfd_reloc_ok; | |
51 | return bfd_reloc_continue; | |
52 | } | |
53 | ||
2469cfa2 NC |
54 | static reloc_howto_type elf_msp430_howto_table[] = |
55 | { | |
56 | HOWTO (R_MSP430_NONE, /* type */ | |
57 | 0, /* rightshift */ | |
6346d5ca AM |
58 | 3, /* size (0 = byte, 1 = short, 2 = long) */ |
59 | 0, /* bitsize */ | |
2469cfa2 NC |
60 | FALSE, /* pc_relative */ |
61 | 0, /* bitpos */ | |
6346d5ca | 62 | complain_overflow_dont,/* complain_on_overflow */ |
2469cfa2 NC |
63 | bfd_elf_generic_reloc, /* special_function */ |
64 | "R_MSP430_NONE", /* name */ | |
65 | FALSE, /* partial_inplace */ | |
66 | 0, /* src_mask */ | |
67 | 0, /* dst_mask */ | |
68 | FALSE), /* pcrel_offset */ | |
69 | ||
70 | HOWTO (R_MSP430_32, /* type */ | |
71 | 0, /* rightshift */ | |
72 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
73 | 32, /* bitsize */ | |
74 | FALSE, /* pc_relative */ | |
75 | 0, /* bitpos */ | |
b18c562e | 76 | complain_overflow_bitfield,/* complain_on_overflow */ |
2469cfa2 NC |
77 | bfd_elf_generic_reloc, /* special_function */ |
78 | "R_MSP430_32", /* name */ | |
79 | FALSE, /* partial_inplace */ | |
80 | 0xffffffff, /* src_mask */ | |
81 | 0xffffffff, /* dst_mask */ | |
82 | FALSE), /* pcrel_offset */ | |
83 | ||
df301bfc | 84 | /* A 10 bit PC relative relocation. */ |
2469cfa2 NC |
85 | HOWTO (R_MSP430_10_PCREL, /* type */ |
86 | 1, /* rightshift */ | |
87 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
88 | 10, /* bitsize */ | |
89 | TRUE, /* pc_relative */ | |
90 | 0, /* bitpos */ | |
b18c562e | 91 | complain_overflow_bitfield,/* complain_on_overflow */ |
2469cfa2 | 92 | bfd_elf_generic_reloc, /* special_function */ |
13761a11 | 93 | "R_MSP430_10_PCREL", /* name */ |
2469cfa2 | 94 | FALSE, /* partial_inplace */ |
df301bfc NC |
95 | 0x3ff, /* src_mask */ |
96 | 0x3ff, /* dst_mask */ | |
2469cfa2 NC |
97 | TRUE), /* pcrel_offset */ |
98 | ||
99 | /* A 16 bit absolute relocation. */ | |
100 | HOWTO (R_MSP430_16, /* type */ | |
101 | 0, /* rightshift */ | |
102 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
103 | 16, /* bitsize */ | |
104 | FALSE, /* pc_relative */ | |
105 | 0, /* bitpos */ | |
106 | complain_overflow_dont,/* complain_on_overflow */ | |
107 | bfd_elf_generic_reloc, /* special_function */ | |
108 | "R_MSP430_16", /* name */ | |
109 | FALSE, /* partial_inplace */ | |
b18c562e | 110 | 0, /* src_mask */ |
2469cfa2 NC |
111 | 0xffff, /* dst_mask */ |
112 | FALSE), /* pcrel_offset */ | |
113 | ||
13761a11 | 114 | /* A 16 bit PC relative relocation for command address. */ |
2469cfa2 NC |
115 | HOWTO (R_MSP430_16_PCREL, /* type */ |
116 | 1, /* rightshift */ | |
117 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
118 | 16, /* bitsize */ | |
119 | TRUE, /* pc_relative */ | |
120 | 0, /* bitpos */ | |
121 | complain_overflow_dont,/* complain_on_overflow */ | |
122 | bfd_elf_generic_reloc, /* special_function */ | |
123 | "R_MSP430_16_PCREL", /* name */ | |
124 | FALSE, /* partial_inplace */ | |
b18c562e | 125 | 0, /* src_mask */ |
2469cfa2 NC |
126 | 0xffff, /* dst_mask */ |
127 | TRUE), /* pcrel_offset */ | |
128 | ||
129 | /* A 16 bit absolute relocation, byte operations. */ | |
130 | HOWTO (R_MSP430_16_BYTE, /* type */ | |
131 | 0, /* rightshift */ | |
132 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
133 | 16, /* bitsize */ | |
134 | FALSE, /* pc_relative */ | |
135 | 0, /* bitpos */ | |
136 | complain_overflow_dont,/* complain_on_overflow */ | |
137 | bfd_elf_generic_reloc, /* special_function */ | |
138 | "R_MSP430_16_BYTE", /* name */ | |
139 | FALSE, /* partial_inplace */ | |
140 | 0xffff, /* src_mask */ | |
141 | 0xffff, /* dst_mask */ | |
142 | FALSE), /* pcrel_offset */ | |
143 | ||
144 | /* A 16 bit absolute relocation for command address. */ | |
145 | HOWTO (R_MSP430_16_PCREL_BYTE,/* type */ | |
146 | 1, /* rightshift */ | |
147 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
148 | 16, /* bitsize */ | |
149 | TRUE, /* pc_relative */ | |
150 | 0, /* bitpos */ | |
151 | complain_overflow_dont,/* complain_on_overflow */ | |
152 | bfd_elf_generic_reloc, /* special_function */ | |
b18c562e | 153 | "R_MSP430_16_PCREL_BYTE",/* name */ |
2469cfa2 NC |
154 | FALSE, /* partial_inplace */ |
155 | 0xffff, /* src_mask */ | |
156 | 0xffff, /* dst_mask */ | |
b18c562e NC |
157 | TRUE), /* pcrel_offset */ |
158 | ||
df301bfc | 159 | /* A 10 bit PC relative relocation for complicated polymorphs. */ |
b18c562e NC |
160 | HOWTO (R_MSP430_2X_PCREL, /* type */ |
161 | 1, /* rightshift */ | |
162 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
163 | 10, /* bitsize */ | |
164 | TRUE, /* pc_relative */ | |
165 | 0, /* bitpos */ | |
166 | complain_overflow_bitfield,/* complain_on_overflow */ | |
167 | bfd_elf_generic_reloc, /* special_function */ | |
168 | "R_MSP430_2X_PCREL", /* name */ | |
169 | FALSE, /* partial_inplace */ | |
df301bfc NC |
170 | 0x3ff, /* src_mask */ |
171 | 0x3ff, /* dst_mask */ | |
b18c562e NC |
172 | TRUE), /* pcrel_offset */ |
173 | ||
174 | /* A 16 bit relaxable relocation for command address. */ | |
175 | HOWTO (R_MSP430_RL_PCREL, /* type */ | |
176 | 1, /* rightshift */ | |
177 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
178 | 16, /* bitsize */ | |
179 | TRUE, /* pc_relative */ | |
180 | 0, /* bitpos */ | |
181 | complain_overflow_dont,/* complain_on_overflow */ | |
182 | bfd_elf_generic_reloc, /* special_function */ | |
183 | "R_MSP430_RL_PCREL", /* name */ | |
184 | FALSE, /* partial_inplace */ | |
185 | 0, /* src_mask */ | |
186 | 0xffff, /* dst_mask */ | |
2469cfa2 | 187 | TRUE) /* pcrel_offset */ |
13761a11 NC |
188 | |
189 | /* A 8-bit absolute relocation. */ | |
190 | , HOWTO (R_MSP430_8, /* type */ | |
191 | 0, /* rightshift */ | |
192 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
193 | 8, /* bitsize */ | |
194 | FALSE, /* pc_relative */ | |
195 | 0, /* bitpos */ | |
196 | complain_overflow_dont,/* complain_on_overflow */ | |
197 | bfd_elf_generic_reloc, /* special_function */ | |
198 | "R_MSP430_8", /* name */ | |
199 | FALSE, /* partial_inplace */ | |
200 | 0, /* src_mask */ | |
201 | 0xffff, /* dst_mask */ | |
202 | FALSE), /* pcrel_offset */ | |
203 | ||
204 | /* Together with a following reloc, allows for the difference | |
205 | between two symbols to be the real addend of the second reloc. */ | |
206 | HOWTO (R_MSP430_SYM_DIFF, /* type */ | |
207 | 0, /* rightshift */ | |
208 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
209 | 32, /* bitsize */ | |
210 | FALSE, /* pc_relative */ | |
211 | 0, /* bitpos */ | |
212 | complain_overflow_dont,/* complain_on_overflow */ | |
1ade7175 | 213 | rl78_sym_diff_handler, /* special handler. */ |
13761a11 NC |
214 | "R_MSP430_SYM_DIFF", /* name */ |
215 | FALSE, /* partial_inplace */ | |
216 | 0xffffffff, /* src_mask */ | |
217 | 0xffffffff, /* dst_mask */ | |
1b786873 | 218 | FALSE) /* pcrel_offset */ |
13761a11 NC |
219 | }; |
220 | ||
221 | static reloc_howto_type elf_msp430x_howto_table[] = | |
222 | { | |
223 | HOWTO (R_MSP430_NONE, /* type */ | |
224 | 0, /* rightshift */ | |
6346d5ca AM |
225 | 3, /* size (0 = byte, 1 = short, 2 = long) */ |
226 | 0, /* bitsize */ | |
13761a11 NC |
227 | FALSE, /* pc_relative */ |
228 | 0, /* bitpos */ | |
6346d5ca | 229 | complain_overflow_dont,/* complain_on_overflow */ |
13761a11 NC |
230 | bfd_elf_generic_reloc, /* special_function */ |
231 | "R_MSP430_NONE", /* name */ | |
232 | FALSE, /* partial_inplace */ | |
233 | 0, /* src_mask */ | |
234 | 0, /* dst_mask */ | |
235 | FALSE), /* pcrel_offset */ | |
236 | ||
237 | HOWTO (R_MSP430_ABS32, /* type */ | |
238 | 0, /* rightshift */ | |
239 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
240 | 32, /* bitsize */ | |
241 | FALSE, /* pc_relative */ | |
242 | 0, /* bitpos */ | |
243 | complain_overflow_bitfield,/* complain_on_overflow */ | |
244 | bfd_elf_generic_reloc, /* special_function */ | |
245 | "R_MSP430_ABS32", /* name */ | |
246 | FALSE, /* partial_inplace */ | |
247 | 0xffffffff, /* src_mask */ | |
248 | 0xffffffff, /* dst_mask */ | |
249 | FALSE), /* pcrel_offset */ | |
250 | ||
251 | HOWTO (R_MSP430_ABS16, /* type */ | |
252 | 0, /* rightshift */ | |
253 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
254 | 16, /* bitsize */ | |
255 | FALSE, /* pc_relative */ | |
256 | 0, /* bitpos */ | |
257 | complain_overflow_dont,/* complain_on_overflow */ | |
258 | bfd_elf_generic_reloc, /* special_function */ | |
259 | "R_MSP430_ABS16", /* name */ | |
260 | FALSE, /* partial_inplace */ | |
261 | 0, /* src_mask */ | |
262 | 0xffff, /* dst_mask */ | |
263 | FALSE), /* pcrel_offset */ | |
264 | ||
265 | HOWTO (R_MSP430_ABS8, /* type */ | |
266 | 0, /* rightshift */ | |
267 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
268 | 8, /* bitsize */ | |
269 | FALSE, /* pc_relative */ | |
270 | 0, /* bitpos */ | |
271 | complain_overflow_bitfield,/* complain_on_overflow */ | |
272 | bfd_elf_generic_reloc, /* special_function */ | |
273 | "R_MSP430_ABS8", /* name */ | |
274 | FALSE, /* partial_inplace */ | |
275 | 0xff, /* src_mask */ | |
276 | 0xff, /* dst_mask */ | |
277 | FALSE), /* pcrel_offset */ | |
278 | ||
279 | HOWTO (R_MSP430_PCR16, /* type */ | |
280 | 1, /* rightshift */ | |
281 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
282 | 16, /* bitsize */ | |
283 | TRUE, /* pc_relative */ | |
284 | 0, /* bitpos */ | |
285 | complain_overflow_dont,/* complain_on_overflow */ | |
286 | bfd_elf_generic_reloc, /* special_function */ | |
287 | "R_MSP430_PCR16", /* name */ | |
288 | FALSE, /* partial_inplace */ | |
289 | 0, /* src_mask */ | |
290 | 0xffff, /* dst_mask */ | |
291 | TRUE), /* pcrel_offset */ | |
292 | ||
293 | HOWTO (R_MSP430X_PCR20_EXT_SRC,/* type */ | |
294 | 0, /* rightshift */ | |
295 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
296 | 32, /* bitsize */ | |
297 | TRUE, /* pc_relative */ | |
298 | 0, /* bitpos */ | |
299 | complain_overflow_dont,/* complain_on_overflow */ | |
300 | bfd_elf_generic_reloc, /* special_function */ | |
301 | "R_MSP430X_PCR20_EXT_SRC",/* name */ | |
302 | FALSE, /* partial_inplace */ | |
303 | 0, /* src_mask */ | |
304 | 0xffff, /* dst_mask */ | |
305 | TRUE), /* pcrel_offset */ | |
306 | ||
307 | HOWTO (R_MSP430X_PCR20_EXT_DST,/* type */ | |
308 | 0, /* rightshift */ | |
309 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
310 | 32, /* bitsize */ | |
311 | TRUE, /* pc_relative */ | |
312 | 0, /* bitpos */ | |
313 | complain_overflow_dont,/* complain_on_overflow */ | |
314 | bfd_elf_generic_reloc, /* special_function */ | |
315 | "R_MSP430X_PCR20_EXT_DST",/* name */ | |
316 | FALSE, /* partial_inplace */ | |
317 | 0, /* src_mask */ | |
318 | 0xffff, /* dst_mask */ | |
319 | TRUE), /* pcrel_offset */ | |
320 | ||
321 | HOWTO (R_MSP430X_PCR20_EXT_ODST,/* type */ | |
322 | 0, /* rightshift */ | |
323 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
324 | 32, /* bitsize */ | |
325 | TRUE, /* pc_relative */ | |
326 | 0, /* bitpos */ | |
327 | complain_overflow_dont,/* complain_on_overflow */ | |
328 | bfd_elf_generic_reloc, /* special_function */ | |
329 | "R_MSP430X_PCR20_EXT_ODST",/* name */ | |
330 | FALSE, /* partial_inplace */ | |
331 | 0, /* src_mask */ | |
332 | 0xffff, /* dst_mask */ | |
333 | TRUE), /* pcrel_offset */ | |
334 | ||
335 | HOWTO (R_MSP430X_ABS20_EXT_SRC,/* type */ | |
336 | 0, /* rightshift */ | |
337 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
338 | 32, /* bitsize */ | |
339 | TRUE, /* pc_relative */ | |
340 | 0, /* bitpos */ | |
341 | complain_overflow_dont,/* complain_on_overflow */ | |
342 | bfd_elf_generic_reloc, /* special_function */ | |
343 | "R_MSP430X_ABS20_EXT_SRC",/* name */ | |
344 | FALSE, /* partial_inplace */ | |
345 | 0, /* src_mask */ | |
346 | 0xffff, /* dst_mask */ | |
347 | TRUE), /* pcrel_offset */ | |
348 | ||
349 | HOWTO (R_MSP430X_ABS20_EXT_DST,/* type */ | |
350 | 0, /* rightshift */ | |
351 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
352 | 32, /* bitsize */ | |
353 | TRUE, /* pc_relative */ | |
354 | 0, /* bitpos */ | |
355 | complain_overflow_dont,/* complain_on_overflow */ | |
356 | bfd_elf_generic_reloc, /* special_function */ | |
357 | "R_MSP430X_ABS20_EXT_DST",/* name */ | |
358 | FALSE, /* partial_inplace */ | |
359 | 0, /* src_mask */ | |
360 | 0xffff, /* dst_mask */ | |
361 | TRUE), /* pcrel_offset */ | |
362 | ||
363 | HOWTO (R_MSP430X_ABS20_EXT_ODST,/* type */ | |
364 | 0, /* rightshift */ | |
365 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
366 | 32, /* bitsize */ | |
367 | TRUE, /* pc_relative */ | |
368 | 0, /* bitpos */ | |
369 | complain_overflow_dont,/* complain_on_overflow */ | |
370 | bfd_elf_generic_reloc, /* special_function */ | |
371 | "R_MSP430X_ABS20_EXT_ODST",/* name */ | |
372 | FALSE, /* partial_inplace */ | |
373 | 0, /* src_mask */ | |
374 | 0xffff, /* dst_mask */ | |
375 | TRUE), /* pcrel_offset */ | |
376 | ||
377 | HOWTO (R_MSP430X_ABS20_ADR_SRC,/* type */ | |
378 | 0, /* rightshift */ | |
379 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
380 | 32, /* bitsize */ | |
381 | TRUE, /* pc_relative */ | |
382 | 0, /* bitpos */ | |
383 | complain_overflow_dont,/* complain_on_overflow */ | |
384 | bfd_elf_generic_reloc, /* special_function */ | |
385 | "R_MSP430X_ABS20_ADR_SRC",/* name */ | |
386 | FALSE, /* partial_inplace */ | |
387 | 0, /* src_mask */ | |
388 | 0xffff, /* dst_mask */ | |
389 | TRUE), /* pcrel_offset */ | |
390 | ||
391 | HOWTO (R_MSP430X_ABS20_ADR_DST,/* type */ | |
392 | 0, /* rightshift */ | |
393 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
394 | 32, /* bitsize */ | |
395 | TRUE, /* pc_relative */ | |
396 | 0, /* bitpos */ | |
397 | complain_overflow_dont,/* complain_on_overflow */ | |
398 | bfd_elf_generic_reloc, /* special_function */ | |
399 | "R_MSP430X_ABS20_ADR_DST",/* name */ | |
400 | FALSE, /* partial_inplace */ | |
401 | 0, /* src_mask */ | |
402 | 0xffff, /* dst_mask */ | |
403 | TRUE), /* pcrel_offset */ | |
404 | ||
405 | HOWTO (R_MSP430X_PCR16, /* type */ | |
406 | 0, /* rightshift */ | |
407 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
408 | 32, /* bitsize */ | |
409 | TRUE, /* pc_relative */ | |
410 | 0, /* bitpos */ | |
411 | complain_overflow_dont,/* complain_on_overflow */ | |
412 | bfd_elf_generic_reloc, /* special_function */ | |
413 | "R_MSP430X_PCR16", /* name */ | |
414 | FALSE, /* partial_inplace */ | |
415 | 0, /* src_mask */ | |
416 | 0xffff, /* dst_mask */ | |
417 | TRUE), /* pcrel_offset */ | |
418 | ||
419 | HOWTO (R_MSP430X_PCR20_CALL, /* type */ | |
420 | 0, /* rightshift */ | |
421 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
422 | 32, /* bitsize */ | |
423 | TRUE, /* pc_relative */ | |
424 | 0, /* bitpos */ | |
425 | complain_overflow_dont,/* complain_on_overflow */ | |
426 | bfd_elf_generic_reloc, /* special_function */ | |
427 | "R_MSP430X_PCR20_CALL",/* name */ | |
428 | FALSE, /* partial_inplace */ | |
429 | 0, /* src_mask */ | |
430 | 0xffff, /* dst_mask */ | |
431 | TRUE), /* pcrel_offset */ | |
432 | ||
433 | HOWTO (R_MSP430X_ABS16, /* type */ | |
434 | 0, /* rightshift */ | |
435 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
436 | 32, /* bitsize */ | |
437 | TRUE, /* pc_relative */ | |
438 | 0, /* bitpos */ | |
439 | complain_overflow_dont,/* complain_on_overflow */ | |
440 | bfd_elf_generic_reloc, /* special_function */ | |
441 | "R_MSP430X_ABS16", /* name */ | |
442 | FALSE, /* partial_inplace */ | |
443 | 0, /* src_mask */ | |
444 | 0xffff, /* dst_mask */ | |
445 | TRUE), /* pcrel_offset */ | |
446 | ||
447 | HOWTO (R_MSP430_ABS_HI16, /* type */ | |
448 | 0, /* rightshift */ | |
449 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
450 | 32, /* bitsize */ | |
451 | TRUE, /* pc_relative */ | |
452 | 0, /* bitpos */ | |
453 | complain_overflow_dont,/* complain_on_overflow */ | |
454 | bfd_elf_generic_reloc, /* special_function */ | |
455 | "R_MSP430_ABS_HI16", /* name */ | |
456 | FALSE, /* partial_inplace */ | |
457 | 0, /* src_mask */ | |
458 | 0xffff, /* dst_mask */ | |
459 | TRUE), /* pcrel_offset */ | |
460 | ||
461 | HOWTO (R_MSP430_PREL31, /* type */ | |
462 | 0, /* rightshift */ | |
463 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
464 | 32, /* bitsize */ | |
465 | TRUE, /* pc_relative */ | |
466 | 0, /* bitpos */ | |
467 | complain_overflow_dont,/* complain_on_overflow */ | |
468 | bfd_elf_generic_reloc, /* special_function */ | |
469 | "R_MSP430_PREL31", /* name */ | |
470 | FALSE, /* partial_inplace */ | |
471 | 0, /* src_mask */ | |
472 | 0xffff, /* dst_mask */ | |
473 | TRUE), /* pcrel_offset */ | |
474 | ||
475 | EMPTY_HOWTO (R_MSP430_EHTYPE), | |
1b786873 | 476 | |
df301bfc | 477 | /* A 10 bit PC relative relocation. */ |
13761a11 NC |
478 | HOWTO (R_MSP430X_10_PCREL, /* type */ |
479 | 1, /* rightshift */ | |
480 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
481 | 10, /* bitsize */ | |
482 | TRUE, /* pc_relative */ | |
483 | 0, /* bitpos */ | |
484 | complain_overflow_bitfield,/* complain_on_overflow */ | |
485 | bfd_elf_generic_reloc, /* special_function */ | |
486 | "R_MSP430X_10_PCREL", /* name */ | |
487 | FALSE, /* partial_inplace */ | |
df301bfc NC |
488 | 0x3ff, /* src_mask */ |
489 | 0x3ff, /* dst_mask */ | |
13761a11 NC |
490 | TRUE), /* pcrel_offset */ |
491 | ||
df301bfc | 492 | /* A 10 bit PC relative relocation for complicated polymorphs. */ |
13761a11 NC |
493 | HOWTO (R_MSP430X_2X_PCREL, /* type */ |
494 | 1, /* rightshift */ | |
495 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
496 | 10, /* bitsize */ | |
497 | TRUE, /* pc_relative */ | |
498 | 0, /* bitpos */ | |
499 | complain_overflow_bitfield,/* complain_on_overflow */ | |
500 | bfd_elf_generic_reloc, /* special_function */ | |
501 | "R_MSP430X_2X_PCREL", /* name */ | |
502 | FALSE, /* partial_inplace */ | |
df301bfc NC |
503 | 0x3ff, /* src_mask */ |
504 | 0x3ff, /* dst_mask */ | |
13761a11 NC |
505 | TRUE), /* pcrel_offset */ |
506 | ||
507 | /* Together with a following reloc, allows for the difference | |
508 | between two symbols to be the real addend of the second reloc. */ | |
509 | HOWTO (R_MSP430X_SYM_DIFF, /* type */ | |
510 | 0, /* rightshift */ | |
511 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
512 | 32, /* bitsize */ | |
513 | FALSE, /* pc_relative */ | |
514 | 0, /* bitpos */ | |
515 | complain_overflow_dont,/* complain_on_overflow */ | |
1ade7175 | 516 | rl78_sym_diff_handler, /* special handler. */ |
13761a11 NC |
517 | "R_MSP430X_SYM_DIFF", /* name */ |
518 | FALSE, /* partial_inplace */ | |
519 | 0xffffffff, /* src_mask */ | |
520 | 0xffffffff, /* dst_mask */ | |
1b786873 | 521 | FALSE) /* pcrel_offset */ |
2469cfa2 NC |
522 | }; |
523 | ||
524 | /* Map BFD reloc types to MSP430 ELF reloc types. */ | |
525 | ||
526 | struct msp430_reloc_map | |
527 | { | |
528 | bfd_reloc_code_real_type bfd_reloc_val; | |
529 | unsigned int elf_reloc_val; | |
530 | }; | |
531 | ||
532 | static const struct msp430_reloc_map msp430_reloc_map[] = | |
13761a11 NC |
533 | { |
534 | {BFD_RELOC_NONE, R_MSP430_NONE}, | |
535 | {BFD_RELOC_32, R_MSP430_32}, | |
536 | {BFD_RELOC_MSP430_10_PCREL, R_MSP430_10_PCREL}, | |
537 | {BFD_RELOC_16, R_MSP430_16_BYTE}, | |
538 | {BFD_RELOC_MSP430_16_PCREL, R_MSP430_16_PCREL}, | |
539 | {BFD_RELOC_MSP430_16, R_MSP430_16}, | |
540 | {BFD_RELOC_MSP430_16_PCREL_BYTE, R_MSP430_16_PCREL_BYTE}, | |
541 | {BFD_RELOC_MSP430_16_BYTE, R_MSP430_16_BYTE}, | |
542 | {BFD_RELOC_MSP430_2X_PCREL, R_MSP430_2X_PCREL}, | |
543 | {BFD_RELOC_MSP430_RL_PCREL, R_MSP430_RL_PCREL}, | |
544 | {BFD_RELOC_8, R_MSP430_8}, | |
545 | {BFD_RELOC_MSP430_SYM_DIFF, R_MSP430_SYM_DIFF} | |
546 | }; | |
547 | ||
548 | static const struct msp430_reloc_map msp430x_reloc_map[] = | |
549 | { | |
550 | {BFD_RELOC_NONE, R_MSP430_NONE}, | |
551 | {BFD_RELOC_32, R_MSP430_ABS32}, | |
552 | {BFD_RELOC_16, R_MSP430_ABS16}, | |
553 | {BFD_RELOC_8, R_MSP430_ABS8}, | |
554 | {BFD_RELOC_MSP430_ABS8, R_MSP430_ABS8}, | |
555 | {BFD_RELOC_MSP430X_PCR20_EXT_SRC, R_MSP430X_PCR20_EXT_SRC}, | |
556 | {BFD_RELOC_MSP430X_PCR20_EXT_DST, R_MSP430X_PCR20_EXT_DST}, | |
557 | {BFD_RELOC_MSP430X_PCR20_EXT_ODST, R_MSP430X_PCR20_EXT_ODST}, | |
558 | {BFD_RELOC_MSP430X_ABS20_EXT_SRC, R_MSP430X_ABS20_EXT_SRC}, | |
559 | {BFD_RELOC_MSP430X_ABS20_EXT_DST, R_MSP430X_ABS20_EXT_DST}, | |
560 | {BFD_RELOC_MSP430X_ABS20_EXT_ODST, R_MSP430X_ABS20_EXT_ODST}, | |
561 | {BFD_RELOC_MSP430X_ABS20_ADR_SRC, R_MSP430X_ABS20_ADR_SRC}, | |
562 | {BFD_RELOC_MSP430X_ABS20_ADR_DST, R_MSP430X_ABS20_ADR_DST}, | |
563 | {BFD_RELOC_MSP430X_PCR16, R_MSP430X_PCR16}, | |
564 | {BFD_RELOC_MSP430X_PCR20_CALL, R_MSP430X_PCR20_CALL}, | |
565 | {BFD_RELOC_MSP430X_ABS16, R_MSP430X_ABS16}, | |
566 | {BFD_RELOC_MSP430_ABS_HI16, R_MSP430_ABS_HI16}, | |
567 | {BFD_RELOC_MSP430_PREL31, R_MSP430_PREL31}, | |
568 | {BFD_RELOC_MSP430_10_PCREL, R_MSP430X_10_PCREL}, | |
569 | {BFD_RELOC_MSP430_2X_PCREL, R_MSP430X_2X_PCREL}, | |
570 | {BFD_RELOC_MSP430_RL_PCREL, R_MSP430X_PCR16}, | |
571 | {BFD_RELOC_MSP430_SYM_DIFF, R_MSP430X_SYM_DIFF} | |
572 | }; | |
573 | ||
574 | static inline bfd_boolean | |
575 | uses_msp430x_relocs (bfd * abfd) | |
576 | { | |
6d00b590 | 577 | extern const bfd_target msp430_elf32_ti_vec; |
13761a11 NC |
578 | |
579 | return bfd_get_mach (abfd) == bfd_mach_msp430x | |
6d00b590 | 580 | || abfd->xvec == & msp430_elf32_ti_vec; |
13761a11 | 581 | } |
2469cfa2 NC |
582 | |
583 | static reloc_howto_type * | |
b18c562e NC |
584 | bfd_elf32_bfd_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, |
585 | bfd_reloc_code_real_type code) | |
2469cfa2 NC |
586 | { |
587 | unsigned int i; | |
588 | ||
13761a11 NC |
589 | if (uses_msp430x_relocs (abfd)) |
590 | { | |
591 | for (i = ARRAY_SIZE (msp430x_reloc_map); i--;) | |
592 | if (msp430x_reloc_map[i].bfd_reloc_val == code) | |
593 | return elf_msp430x_howto_table + msp430x_reloc_map[i].elf_reloc_val; | |
594 | } | |
595 | else | |
596 | { | |
597 | for (i = 0; i < ARRAY_SIZE (msp430_reloc_map); i++) | |
598 | if (msp430_reloc_map[i].bfd_reloc_val == code) | |
599 | return &elf_msp430_howto_table[msp430_reloc_map[i].elf_reloc_val]; | |
600 | } | |
2469cfa2 NC |
601 | |
602 | return NULL; | |
603 | } | |
604 | ||
157090f7 AM |
605 | static reloc_howto_type * |
606 | bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
607 | const char *r_name) | |
608 | { | |
609 | unsigned int i; | |
610 | ||
13761a11 NC |
611 | if (uses_msp430x_relocs (abfd)) |
612 | { | |
613 | for (i = ARRAY_SIZE (elf_msp430x_howto_table); i--;) | |
614 | if (elf_msp430x_howto_table[i].name != NULL | |
615 | && strcasecmp (elf_msp430x_howto_table[i].name, r_name) == 0) | |
616 | return elf_msp430x_howto_table + i; | |
617 | } | |
618 | else | |
619 | { | |
620 | for (i = 0; | |
621 | i < (sizeof (elf_msp430_howto_table) | |
622 | / sizeof (elf_msp430_howto_table[0])); | |
623 | i++) | |
624 | if (elf_msp430_howto_table[i].name != NULL | |
625 | && strcasecmp (elf_msp430_howto_table[i].name, r_name) == 0) | |
626 | return &elf_msp430_howto_table[i]; | |
627 | } | |
157090f7 AM |
628 | |
629 | return NULL; | |
630 | } | |
631 | ||
2469cfa2 NC |
632 | /* Set the howto pointer for an MSP430 ELF reloc. */ |
633 | ||
634 | static void | |
b18c562e NC |
635 | msp430_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED, |
636 | arelent * cache_ptr, | |
637 | Elf_Internal_Rela * dst) | |
2469cfa2 NC |
638 | { |
639 | unsigned int r_type; | |
640 | ||
641 | r_type = ELF32_R_TYPE (dst->r_info); | |
13761a11 NC |
642 | |
643 | if (uses_msp430x_relocs (abfd)) | |
644 | { | |
5860e3f8 NC |
645 | if (r_type >= (unsigned int) R_MSP430x_max) |
646 | { | |
64d29018 | 647 | _bfd_error_handler (_("%B: invalid MSP430X reloc number: %d"), abfd, r_type); |
5860e3f8 NC |
648 | r_type = 0; |
649 | } | |
13761a11 NC |
650 | cache_ptr->howto = elf_msp430x_howto_table + r_type; |
651 | return; | |
652 | } | |
653 | ||
5860e3f8 NC |
654 | if (r_type >= (unsigned int) R_MSP430_max) |
655 | { | |
64d29018 | 656 | _bfd_error_handler (_("%B: invalid MSP430 reloc number: %d"), abfd, r_type); |
5860e3f8 NC |
657 | r_type = 0; |
658 | } | |
2469cfa2 NC |
659 | cache_ptr->howto = &elf_msp430_howto_table[r_type]; |
660 | } | |
661 | ||
2469cfa2 NC |
662 | /* Look through the relocs for a section during the first phase. |
663 | Since we don't do .gots or .plts, we just need to consider the | |
664 | virtual table relocs for gc. */ | |
665 | ||
666 | static bfd_boolean | |
b18c562e NC |
667 | elf32_msp430_check_relocs (bfd * abfd, struct bfd_link_info * info, |
668 | asection * sec, const Elf_Internal_Rela * relocs) | |
2469cfa2 NC |
669 | { |
670 | Elf_Internal_Shdr *symtab_hdr; | |
5582a088 | 671 | struct elf_link_hash_entry **sym_hashes; |
2469cfa2 NC |
672 | const Elf_Internal_Rela *rel; |
673 | const Elf_Internal_Rela *rel_end; | |
674 | ||
0e1862bb | 675 | if (bfd_link_relocatable (info)) |
2469cfa2 NC |
676 | return TRUE; |
677 | ||
678 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
679 | sym_hashes = elf_sym_hashes (abfd); | |
2469cfa2 NC |
680 | |
681 | rel_end = relocs + sec->reloc_count; | |
682 | for (rel = relocs; rel < rel_end; rel++) | |
683 | { | |
684 | struct elf_link_hash_entry *h; | |
685 | unsigned long r_symndx; | |
686 | ||
687 | r_symndx = ELF32_R_SYM (rel->r_info); | |
688 | if (r_symndx < symtab_hdr->sh_info) | |
689 | h = NULL; | |
690 | else | |
973a3492 L |
691 | { |
692 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
693 | while (h->root.type == bfd_link_hash_indirect | |
694 | || h->root.type == bfd_link_hash_warning) | |
695 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
81fbe831 AM |
696 | |
697 | /* PR15323, ref flags aren't set for references in the same | |
698 | object. */ | |
699 | h->root.non_ir_ref = 1; | |
973a3492 | 700 | } |
2469cfa2 NC |
701 | } |
702 | ||
703 | return TRUE; | |
704 | } | |
705 | ||
706 | /* Perform a single relocation. By default we use the standard BFD | |
707 | routines, but a few relocs, we have to do them ourselves. */ | |
708 | ||
709 | static bfd_reloc_status_type | |
13761a11 NC |
710 | msp430_final_link_relocate (reloc_howto_type * howto, |
711 | bfd * input_bfd, | |
712 | asection * input_section, | |
713 | bfd_byte * contents, | |
714 | Elf_Internal_Rela * rel, | |
715 | bfd_vma relocation, | |
716 | struct bfd_link_info * info) | |
2469cfa2 | 717 | { |
13761a11 NC |
718 | static asection * sym_diff_section; |
719 | static bfd_vma sym_diff_value; | |
720 | ||
721 | struct bfd_elf_section_data * esd = elf_section_data (input_section); | |
2469cfa2 NC |
722 | bfd_reloc_status_type r = bfd_reloc_ok; |
723 | bfd_vma x; | |
724 | bfd_signed_vma srel; | |
13761a11 NC |
725 | bfd_boolean is_rel_reloc = FALSE; |
726 | ||
727 | if (uses_msp430x_relocs (input_bfd)) | |
728 | { | |
729 | /* See if we have a REL type relocation. */ | |
730 | is_rel_reloc = (esd->rel.hdr != NULL); | |
731 | /* Sanity check - only one type of relocation per section. | |
732 | FIXME: Theoretically it is possible to have both types, | |
733 | but if that happens how can we distinguish between the two ? */ | |
734 | BFD_ASSERT (! is_rel_reloc || ! esd->rela.hdr); | |
735 | /* If we are using a REL relocation then the addend should be empty. */ | |
736 | BFD_ASSERT (! is_rel_reloc || rel->r_addend == 0); | |
737 | } | |
2469cfa2 | 738 | |
13761a11 | 739 | if (sym_diff_section != NULL) |
2469cfa2 | 740 | { |
13761a11 | 741 | BFD_ASSERT (sym_diff_section == input_section); |
1b786873 | 742 | |
13761a11 NC |
743 | if (uses_msp430x_relocs (input_bfd)) |
744 | switch (howto->type) | |
745 | { | |
746 | case R_MSP430_ABS32: | |
747 | /* If we are computing a 32-bit value for the location lists | |
748 | and the result is 0 then we add one to the value. A zero | |
749 | value can result because of linker relaxation deleteing | |
750 | prologue instructions and using a value of 1 (for the begin | |
751 | and end offsets in the location list entry) results in a | |
752 | nul entry which does not prevent the following entries from | |
753 | being parsed. */ | |
754 | if (relocation == sym_diff_value | |
755 | && strcmp (input_section->name, ".debug_loc") == 0) | |
756 | ++ relocation; | |
757 | /* Fall through. */ | |
758 | case R_MSP430_ABS16: | |
759 | case R_MSP430X_ABS16: | |
760 | case R_MSP430_ABS8: | |
761 | BFD_ASSERT (! is_rel_reloc); | |
762 | relocation -= sym_diff_value; | |
763 | break; | |
764 | ||
765 | default: | |
766 | return bfd_reloc_dangerous; | |
767 | } | |
768 | else | |
769 | switch (howto->type) | |
770 | { | |
771 | case R_MSP430_32: | |
772 | case R_MSP430_16: | |
773 | case R_MSP430_16_BYTE: | |
774 | case R_MSP430_8: | |
775 | relocation -= sym_diff_value; | |
776 | break; | |
777 | ||
778 | default: | |
779 | return bfd_reloc_dangerous; | |
780 | } | |
1b786873 | 781 | |
13761a11 NC |
782 | sym_diff_section = NULL; |
783 | } | |
784 | ||
785 | if (uses_msp430x_relocs (input_bfd)) | |
786 | switch (howto->type) | |
787 | { | |
788 | case R_MSP430X_SYM_DIFF: | |
789 | /* Cache the input section and value. | |
790 | The offset is unreliable, since relaxation may | |
791 | have reduced the following reloc's offset. */ | |
792 | BFD_ASSERT (! is_rel_reloc); | |
793 | sym_diff_section = input_section; | |
794 | sym_diff_value = relocation; | |
795 | return bfd_reloc_ok; | |
796 | ||
797 | case R_MSP430_ABS16: | |
798 | contents += rel->r_offset; | |
799 | srel = (bfd_signed_vma) relocation; | |
800 | if (is_rel_reloc) | |
801 | srel += bfd_get_16 (input_bfd, contents); | |
802 | else | |
803 | srel += rel->r_addend; | |
804 | bfd_put_16 (input_bfd, srel & 0xffff, contents); | |
805 | break; | |
806 | ||
807 | case R_MSP430X_10_PCREL: | |
808 | contents += rel->r_offset; | |
809 | srel = (bfd_signed_vma) relocation; | |
810 | if (is_rel_reloc) | |
811 | srel += bfd_get_16 (input_bfd, contents) & 0x3ff; | |
812 | else | |
813 | srel += rel->r_addend; | |
814 | srel -= rel->r_offset; | |
815 | srel -= 2; /* Branch instructions add 2 to the PC... */ | |
816 | srel -= (input_section->output_section->vma + | |
817 | input_section->output_offset); | |
818 | if (srel & 1) | |
819 | return bfd_reloc_outofrange; | |
820 | ||
821 | /* MSP430 addresses commands as words. */ | |
822 | srel >>= 1; | |
823 | ||
824 | /* Check for an overflow. */ | |
825 | if (srel < -512 || srel > 511) | |
826 | { | |
827 | if (info->disable_target_specific_optimizations < 0) | |
828 | { | |
829 | static bfd_boolean warned = FALSE; | |
830 | if (! warned) | |
831 | { | |
832 | info->callbacks->warning | |
833 | (info, | |
834 | _("Try enabling relaxation to avoid relocation truncations"), | |
835 | NULL, input_bfd, input_section, relocation); | |
836 | warned = TRUE; | |
837 | } | |
838 | } | |
839 | return bfd_reloc_overflow; | |
840 | } | |
841 | ||
842 | x = bfd_get_16 (input_bfd, contents); | |
843 | x = (x & 0xfc00) | (srel & 0x3ff); | |
844 | bfd_put_16 (input_bfd, x, contents); | |
845 | break; | |
846 | ||
847 | case R_MSP430X_PCR20_EXT_ODST: | |
3f307074 | 848 | /* [0,4]+[48,16] = ---F ---- ---- FFFF */ |
13761a11 NC |
849 | contents += rel->r_offset; |
850 | srel = (bfd_signed_vma) relocation; | |
851 | if (is_rel_reloc) | |
852 | { | |
853 | bfd_vma addend; | |
854 | addend = (bfd_get_16 (input_bfd, contents) & 0xf) << 16; | |
3f307074 | 855 | addend |= bfd_get_16 (input_bfd, contents + 6); |
13761a11 | 856 | srel += addend; |
1b786873 | 857 | |
13761a11 NC |
858 | } |
859 | else | |
860 | srel += rel->r_addend; | |
861 | srel -= rel->r_offset; | |
862 | srel -= (input_section->output_section->vma + | |
863 | input_section->output_offset); | |
864 | bfd_put_16 (input_bfd, (srel & 0xffff), contents + 6); | |
865 | x = bfd_get_16 (input_bfd, contents); | |
866 | x = (x & 0xfff0) | ((srel >> 16) & 0xf); | |
867 | bfd_put_16 (input_bfd, x, contents); | |
868 | break; | |
869 | ||
870 | case R_MSP430X_ABS20_EXT_SRC: | |
3f307074 | 871 | /* [7,4]+[32,16] = -78- ---- FFFF */ |
13761a11 NC |
872 | contents += rel->r_offset; |
873 | srel = (bfd_signed_vma) relocation; | |
874 | if (is_rel_reloc) | |
875 | { | |
876 | bfd_vma addend; | |
877 | addend = (bfd_get_16 (input_bfd, contents) & 0x0780) << 9; | |
3f307074 | 878 | addend |= bfd_get_16 (input_bfd, contents + 4); |
13761a11 NC |
879 | srel += addend; |
880 | } | |
881 | else | |
882 | srel += rel->r_addend; | |
883 | bfd_put_16 (input_bfd, (srel & 0xffff), contents + 4); | |
884 | srel >>= 16; | |
885 | x = bfd_get_16 (input_bfd, contents); | |
886 | x = (x & 0xf87f) | ((srel << 7) & 0x0780); | |
887 | bfd_put_16 (input_bfd, x, contents); | |
888 | break; | |
889 | ||
890 | case R_MSP430_16_PCREL: | |
891 | contents += rel->r_offset; | |
892 | srel = (bfd_signed_vma) relocation; | |
893 | if (is_rel_reloc) | |
894 | srel += bfd_get_16 (input_bfd, contents); | |
895 | else | |
896 | srel += rel->r_addend; | |
897 | srel -= rel->r_offset; | |
898 | /* Only branch instructions add 2 to the PC... */ | |
899 | srel -= (input_section->output_section->vma + | |
900 | input_section->output_offset); | |
901 | if (srel & 1) | |
902 | return bfd_reloc_outofrange; | |
903 | bfd_put_16 (input_bfd, srel & 0xffff, contents); | |
904 | break; | |
905 | ||
906 | case R_MSP430X_PCR20_EXT_DST: | |
3f307074 | 907 | /* [0,4]+[32,16] = ---F ---- FFFF */ |
13761a11 NC |
908 | contents += rel->r_offset; |
909 | srel = (bfd_signed_vma) relocation; | |
910 | if (is_rel_reloc) | |
911 | { | |
912 | bfd_vma addend; | |
913 | addend = (bfd_get_16 (input_bfd, contents) & 0xf) << 16; | |
3f307074 | 914 | addend |= bfd_get_16 (input_bfd, contents + 4); |
13761a11 NC |
915 | srel += addend; |
916 | } | |
917 | else | |
918 | srel += rel->r_addend; | |
919 | srel -= rel->r_offset; | |
920 | srel -= (input_section->output_section->vma + | |
921 | input_section->output_offset); | |
922 | bfd_put_16 (input_bfd, (srel & 0xffff), contents + 4); | |
923 | srel >>= 16; | |
924 | x = bfd_get_16 (input_bfd, contents); | |
925 | x = (x & 0xfff0) | (srel & 0xf); | |
926 | bfd_put_16 (input_bfd, x, contents); | |
927 | break; | |
928 | ||
929 | case R_MSP430X_PCR20_EXT_SRC: | |
3f307074 | 930 | /* [7,4]+[32,16] = -78- ---- FFFF */ |
13761a11 NC |
931 | contents += rel->r_offset; |
932 | srel = (bfd_signed_vma) relocation; | |
933 | if (is_rel_reloc) | |
934 | { | |
935 | bfd_vma addend; | |
936 | addend = ((bfd_get_16 (input_bfd, contents) & 0x0780) << 9); | |
3f307074 | 937 | addend |= bfd_get_16 (input_bfd, contents + 4); |
13761a11 NC |
938 | srel += addend;; |
939 | } | |
940 | else | |
941 | srel += rel->r_addend; | |
942 | srel -= rel->r_offset; | |
943 | /* Only branch instructions add 2 to the PC... */ | |
944 | srel -= (input_section->output_section->vma + | |
945 | input_section->output_offset); | |
946 | bfd_put_16 (input_bfd, (srel & 0xffff), contents + 4); | |
947 | srel >>= 16; | |
948 | x = bfd_get_16 (input_bfd, contents); | |
949 | x = (x & 0xf87f) | ((srel << 7) & 0x0780); | |
950 | bfd_put_16 (input_bfd, x, contents); | |
951 | break; | |
952 | ||
953 | case R_MSP430_ABS8: | |
954 | contents += rel->r_offset; | |
955 | srel = (bfd_signed_vma) relocation; | |
956 | if (is_rel_reloc) | |
957 | srel += bfd_get_8 (input_bfd, contents); | |
958 | else | |
959 | srel += rel->r_addend; | |
960 | bfd_put_8 (input_bfd, srel & 0xff, contents); | |
961 | break; | |
962 | ||
963 | case R_MSP430X_ABS20_EXT_DST: | |
3f307074 | 964 | /* [0,4]+[32,16] = ---F ---- FFFF */ |
13761a11 NC |
965 | contents += rel->r_offset; |
966 | srel = (bfd_signed_vma) relocation; | |
967 | if (is_rel_reloc) | |
3f307074 DD |
968 | { |
969 | bfd_vma addend; | |
970 | addend = (bfd_get_16 (input_bfd, contents) & 0xf) << 16; | |
971 | addend |= bfd_get_16 (input_bfd, contents + 4); | |
972 | srel += addend; | |
973 | } | |
13761a11 NC |
974 | else |
975 | srel += rel->r_addend; | |
976 | bfd_put_16 (input_bfd, (srel & 0xffff), contents + 4); | |
977 | srel >>= 16; | |
978 | x = bfd_get_16 (input_bfd, contents); | |
979 | x = (x & 0xfff0) | (srel & 0xf); | |
980 | bfd_put_16 (input_bfd, x, contents); | |
981 | break; | |
982 | ||
983 | case R_MSP430X_ABS20_EXT_ODST: | |
3f307074 | 984 | /* [0,4]+[48,16] = ---F ---- ---- FFFF */ |
13761a11 NC |
985 | contents += rel->r_offset; |
986 | srel = (bfd_signed_vma) relocation; | |
987 | if (is_rel_reloc) | |
988 | { | |
989 | bfd_vma addend; | |
990 | addend = (bfd_get_16 (input_bfd, contents) & 0xf) << 16; | |
3f307074 | 991 | addend |= bfd_get_16 (input_bfd, contents + 6); |
13761a11 NC |
992 | srel += addend; |
993 | } | |
994 | else | |
995 | srel += rel->r_addend; | |
996 | bfd_put_16 (input_bfd, (srel & 0xffff), contents + 6); | |
997 | srel >>= 16; | |
998 | x = bfd_get_16 (input_bfd, contents); | |
999 | x = (x & 0xfff0) | (srel & 0xf); | |
1000 | bfd_put_16 (input_bfd, x, contents); | |
1001 | break; | |
1002 | ||
1003 | case R_MSP430X_ABS20_ADR_SRC: | |
3f307074 | 1004 | /* [8,4]+[16,16] = -F-- FFFF */ |
13761a11 NC |
1005 | contents += rel->r_offset; |
1006 | srel = (bfd_signed_vma) relocation; | |
1007 | if (is_rel_reloc) | |
1008 | { | |
1009 | bfd_vma addend; | |
1010 | ||
1011 | addend = ((bfd_get_16 (input_bfd, contents) & 0xf00) << 8); | |
3f307074 | 1012 | addend |= bfd_get_16 (input_bfd, contents + 2); |
13761a11 NC |
1013 | srel += addend; |
1014 | } | |
1015 | else | |
1016 | srel += rel->r_addend; | |
1017 | bfd_put_16 (input_bfd, (srel & 0xffff), contents + 2); | |
1018 | srel >>= 16; | |
1019 | x = bfd_get_16 (input_bfd, contents); | |
1020 | x = (x & 0xf0ff) | ((srel << 8) & 0x0f00); | |
1021 | bfd_put_16 (input_bfd, x, contents); | |
1022 | break; | |
1023 | ||
1024 | case R_MSP430X_ABS20_ADR_DST: | |
3f307074 | 1025 | /* [0,4]+[16,16] = ---F FFFF */ |
13761a11 NC |
1026 | contents += rel->r_offset; |
1027 | srel = (bfd_signed_vma) relocation; | |
1028 | if (is_rel_reloc) | |
1029 | { | |
1030 | bfd_vma addend; | |
1031 | addend = ((bfd_get_16 (input_bfd, contents) & 0xf) << 16); | |
3f307074 | 1032 | addend |= bfd_get_16 (input_bfd, contents + 2); |
13761a11 NC |
1033 | srel += addend; |
1034 | } | |
1035 | else | |
1036 | srel += rel->r_addend; | |
1037 | bfd_put_16 (input_bfd, (srel & 0xffff), contents + 2); | |
1038 | srel >>= 16; | |
1039 | x = bfd_get_16 (input_bfd, contents); | |
1040 | x = (x & 0xfff0) | (srel & 0xf); | |
1041 | bfd_put_16 (input_bfd, x, contents); | |
1042 | break; | |
1043 | ||
1044 | case R_MSP430X_ABS16: | |
1045 | contents += rel->r_offset; | |
1046 | srel = (bfd_signed_vma) relocation; | |
1047 | if (is_rel_reloc) | |
1048 | srel += bfd_get_16 (input_bfd, contents); | |
1049 | else | |
1050 | srel += rel->r_addend; | |
1051 | x = srel; | |
1052 | if (x > 0xffff) | |
1b786873 | 1053 | return bfd_reloc_overflow; |
13761a11 NC |
1054 | bfd_put_16 (input_bfd, srel & 0xffff, contents); |
1055 | break; | |
1056 | ||
1057 | case R_MSP430_ABS_HI16: | |
1058 | /* The EABI specifies that this must be a RELA reloc. */ | |
1059 | BFD_ASSERT (! is_rel_reloc); | |
1060 | contents += rel->r_offset; | |
1061 | srel = (bfd_signed_vma) relocation; | |
1062 | srel += rel->r_addend; | |
1063 | bfd_put_16 (input_bfd, (srel >> 16) & 0xffff, contents); | |
1064 | break; | |
1b786873 | 1065 | |
13761a11 | 1066 | case R_MSP430X_PCR20_CALL: |
3f307074 | 1067 | /* [0,4]+[16,16] = ---F FFFF*/ |
13761a11 NC |
1068 | contents += rel->r_offset; |
1069 | srel = (bfd_signed_vma) relocation; | |
1070 | if (is_rel_reloc) | |
1071 | { | |
1072 | bfd_vma addend; | |
1073 | addend = (bfd_get_16 (input_bfd, contents) & 0xf) << 16; | |
3f307074 | 1074 | addend |= bfd_get_16 (input_bfd, contents + 2); |
13761a11 NC |
1075 | srel += addend; |
1076 | } | |
1077 | else | |
1078 | srel += rel->r_addend; | |
1079 | srel -= rel->r_offset; | |
1080 | srel -= (input_section->output_section->vma + | |
1081 | input_section->output_offset); | |
1082 | bfd_put_16 (input_bfd, srel & 0xffff, contents + 2); | |
1083 | srel >>= 16; | |
1084 | x = bfd_get_16 (input_bfd, contents); | |
1085 | x = (x & 0xfff0) | (srel & 0xf); | |
1086 | bfd_put_16 (input_bfd, x, contents); | |
1087 | break; | |
1b786873 | 1088 | |
13761a11 NC |
1089 | case R_MSP430X_PCR16: |
1090 | contents += rel->r_offset; | |
1091 | srel = (bfd_signed_vma) relocation; | |
1092 | if (is_rel_reloc) | |
1093 | srel += bfd_get_16 (input_bfd, contents); | |
1094 | else | |
1095 | srel += rel->r_addend; | |
1096 | srel -= rel->r_offset; | |
1097 | srel -= (input_section->output_section->vma + | |
1098 | input_section->output_offset); | |
1099 | bfd_put_16 (input_bfd, srel & 0xffff, contents); | |
1100 | break; | |
1b786873 | 1101 | |
13761a11 NC |
1102 | case R_MSP430_PREL31: |
1103 | contents += rel->r_offset; | |
1104 | srel = (bfd_signed_vma) relocation; | |
1105 | if (is_rel_reloc) | |
1106 | srel += (bfd_get_32 (input_bfd, contents) & 0x7fffffff); | |
1107 | else | |
1108 | srel += rel->r_addend; | |
1109 | srel += rel->r_addend; | |
1110 | x = bfd_get_32 (input_bfd, contents); | |
1111 | x = (x & 0x80000000) | ((srel >> 31) & 0x7fffffff); | |
1112 | bfd_put_32 (input_bfd, x, contents); | |
1113 | break; | |
1b786873 | 1114 | |
13761a11 NC |
1115 | default: |
1116 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1117 | contents, rel->r_offset, | |
1118 | relocation, rel->r_addend); | |
1119 | } | |
1120 | else | |
1121 | switch (howto->type) | |
1122 | { | |
2469cfa2 NC |
1123 | case R_MSP430_10_PCREL: |
1124 | contents += rel->r_offset; | |
1125 | srel = (bfd_signed_vma) relocation; | |
1126 | srel += rel->r_addend; | |
1127 | srel -= rel->r_offset; | |
1128 | srel -= 2; /* Branch instructions add 2 to the PC... */ | |
1129 | srel -= (input_section->output_section->vma + | |
1130 | input_section->output_offset); | |
1131 | ||
1132 | if (srel & 1) | |
1133 | return bfd_reloc_outofrange; | |
1134 | ||
1135 | /* MSP430 addresses commands as words. */ | |
1136 | srel >>= 1; | |
1137 | ||
1138 | /* Check for an overflow. */ | |
1139 | if (srel < -512 || srel > 511) | |
13761a11 NC |
1140 | { |
1141 | if (info->disable_target_specific_optimizations < 0) | |
1142 | { | |
1143 | static bfd_boolean warned = FALSE; | |
1144 | if (! warned) | |
1145 | { | |
1146 | info->callbacks->warning | |
1147 | (info, | |
1148 | _("Try enabling relaxation to avoid relocation truncations"), | |
1149 | NULL, input_bfd, input_section, relocation); | |
1150 | warned = TRUE; | |
1151 | } | |
1152 | } | |
1153 | return bfd_reloc_overflow; | |
1154 | } | |
1b786873 | 1155 | |
2469cfa2 NC |
1156 | x = bfd_get_16 (input_bfd, contents); |
1157 | x = (x & 0xfc00) | (srel & 0x3ff); | |
1158 | bfd_put_16 (input_bfd, x, contents); | |
1159 | break; | |
1160 | ||
b18c562e NC |
1161 | case R_MSP430_2X_PCREL: |
1162 | contents += rel->r_offset; | |
1163 | srel = (bfd_signed_vma) relocation; | |
1164 | srel += rel->r_addend; | |
1165 | srel -= rel->r_offset; | |
1166 | srel -= 2; /* Branch instructions add 2 to the PC... */ | |
1167 | srel -= (input_section->output_section->vma + | |
1168 | input_section->output_offset); | |
1169 | ||
1170 | if (srel & 1) | |
1171 | return bfd_reloc_outofrange; | |
1172 | ||
1173 | /* MSP430 addresses commands as words. */ | |
1174 | srel >>= 1; | |
1175 | ||
1176 | /* Check for an overflow. */ | |
1177 | if (srel < -512 || srel > 511) | |
1178 | return bfd_reloc_overflow; | |
1179 | ||
1180 | x = bfd_get_16 (input_bfd, contents); | |
1181 | x = (x & 0xfc00) | (srel & 0x3ff); | |
1182 | bfd_put_16 (input_bfd, x, contents); | |
1183 | /* Handle second jump instruction. */ | |
1184 | x = bfd_get_16 (input_bfd, contents - 2); | |
1185 | srel += 1; | |
1186 | x = (x & 0xfc00) | (srel & 0x3ff); | |
1187 | bfd_put_16 (input_bfd, x, contents - 2); | |
1188 | break; | |
1189 | ||
b18c562e | 1190 | case R_MSP430_RL_PCREL: |
77bf820f | 1191 | case R_MSP430_16_PCREL: |
2469cfa2 NC |
1192 | contents += rel->r_offset; |
1193 | srel = (bfd_signed_vma) relocation; | |
1194 | srel += rel->r_addend; | |
1195 | srel -= rel->r_offset; | |
1196 | /* Only branch instructions add 2 to the PC... */ | |
1197 | srel -= (input_section->output_section->vma + | |
1198 | input_section->output_offset); | |
1199 | ||
1200 | if (srel & 1) | |
1201 | return bfd_reloc_outofrange; | |
1202 | ||
1203 | bfd_put_16 (input_bfd, srel & 0xffff, contents); | |
1204 | break; | |
1205 | ||
1206 | case R_MSP430_16_PCREL_BYTE: | |
1207 | contents += rel->r_offset; | |
1208 | srel = (bfd_signed_vma) relocation; | |
1209 | srel += rel->r_addend; | |
1210 | srel -= rel->r_offset; | |
1211 | /* Only branch instructions add 2 to the PC... */ | |
1212 | srel -= (input_section->output_section->vma + | |
1213 | input_section->output_offset); | |
1214 | ||
1215 | bfd_put_16 (input_bfd, srel & 0xffff, contents); | |
1216 | break; | |
1217 | ||
1218 | case R_MSP430_16_BYTE: | |
1219 | contents += rel->r_offset; | |
1220 | srel = (bfd_signed_vma) relocation; | |
1221 | srel += rel->r_addend; | |
1222 | bfd_put_16 (input_bfd, srel & 0xffff, contents); | |
1223 | break; | |
1224 | ||
1225 | case R_MSP430_16: | |
1226 | contents += rel->r_offset; | |
1227 | srel = (bfd_signed_vma) relocation; | |
1228 | srel += rel->r_addend; | |
1229 | ||
1230 | if (srel & 1) | |
1231 | return bfd_reloc_notsupported; | |
1232 | ||
1233 | bfd_put_16 (input_bfd, srel & 0xffff, contents); | |
1234 | break; | |
1235 | ||
13761a11 NC |
1236 | case R_MSP430_8: |
1237 | contents += rel->r_offset; | |
1238 | srel = (bfd_signed_vma) relocation; | |
1239 | srel += rel->r_addend; | |
1240 | ||
1241 | bfd_put_8 (input_bfd, srel & 0xff, contents); | |
1242 | break; | |
1b786873 | 1243 | |
13761a11 NC |
1244 | case R_MSP430_SYM_DIFF: |
1245 | /* Cache the input section and value. | |
1246 | The offset is unreliable, since relaxation may | |
1247 | have reduced the following reloc's offset. */ | |
1248 | sym_diff_section = input_section; | |
1249 | sym_diff_value = relocation; | |
1250 | return bfd_reloc_ok; | |
1251 | ||
1252 | default: | |
1253 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1254 | contents, rel->r_offset, | |
1255 | relocation, rel->r_addend); | |
1256 | } | |
2469cfa2 NC |
1257 | |
1258 | return r; | |
1259 | } | |
1260 | ||
1261 | /* Relocate an MSP430 ELF section. */ | |
1262 | ||
1263 | static bfd_boolean | |
b18c562e NC |
1264 | elf32_msp430_relocate_section (bfd * output_bfd ATTRIBUTE_UNUSED, |
1265 | struct bfd_link_info * info, | |
1266 | bfd * input_bfd, | |
1267 | asection * input_section, | |
1268 | bfd_byte * contents, | |
1269 | Elf_Internal_Rela * relocs, | |
1270 | Elf_Internal_Sym * local_syms, | |
1271 | asection ** local_sections) | |
2469cfa2 NC |
1272 | { |
1273 | Elf_Internal_Shdr *symtab_hdr; | |
1274 | struct elf_link_hash_entry **sym_hashes; | |
1275 | Elf_Internal_Rela *rel; | |
1276 | Elf_Internal_Rela *relend; | |
1277 | ||
1278 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
1279 | sym_hashes = elf_sym_hashes (input_bfd); | |
1280 | relend = relocs + input_section->reloc_count; | |
1281 | ||
1282 | for (rel = relocs; rel < relend; rel++) | |
1283 | { | |
1284 | reloc_howto_type *howto; | |
1285 | unsigned long r_symndx; | |
1286 | Elf_Internal_Sym *sym; | |
1287 | asection *sec; | |
1288 | struct elf_link_hash_entry *h; | |
1289 | bfd_vma relocation; | |
1290 | bfd_reloc_status_type r; | |
1291 | const char *name = NULL; | |
1292 | int r_type; | |
1293 | ||
2469cfa2 NC |
1294 | r_type = ELF32_R_TYPE (rel->r_info); |
1295 | r_symndx = ELF32_R_SYM (rel->r_info); | |
13761a11 NC |
1296 | |
1297 | if (uses_msp430x_relocs (input_bfd)) | |
1298 | howto = elf_msp430x_howto_table + r_type; | |
1299 | else | |
1300 | howto = elf_msp430_howto_table + r_type; | |
1301 | ||
2469cfa2 NC |
1302 | h = NULL; |
1303 | sym = NULL; | |
1304 | sec = NULL; | |
1305 | ||
1306 | if (r_symndx < symtab_hdr->sh_info) | |
1307 | { | |
1308 | sym = local_syms + r_symndx; | |
1309 | sec = local_sections[r_symndx]; | |
8517fae7 | 1310 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
2469cfa2 NC |
1311 | |
1312 | name = bfd_elf_string_from_elf_section | |
1313 | (input_bfd, symtab_hdr->sh_link, sym->st_name); | |
13761a11 | 1314 | name = (name == NULL || * name == 0) ? bfd_section_name (input_bfd, sec) : name; |
2469cfa2 NC |
1315 | } |
1316 | else | |
1317 | { | |
62d887d4 | 1318 | bfd_boolean unresolved_reloc, warned, ignored; |
2469cfa2 | 1319 | |
b2a8e766 AM |
1320 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
1321 | r_symndx, symtab_hdr, sym_hashes, | |
1322 | h, sec, relocation, | |
62d887d4 | 1323 | unresolved_reloc, warned, ignored); |
13761a11 | 1324 | name = h->root.root.string; |
2469cfa2 NC |
1325 | } |
1326 | ||
dbaa2011 | 1327 | if (sec != NULL && discarded_section (sec)) |
e4067dbb | 1328 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
545fd46b | 1329 | rel, 1, relend, howto, 0, contents); |
ab96bf03 | 1330 | |
0e1862bb | 1331 | if (bfd_link_relocatable (info)) |
ab96bf03 AM |
1332 | continue; |
1333 | ||
2469cfa2 | 1334 | r = msp430_final_link_relocate (howto, input_bfd, input_section, |
13761a11 | 1335 | contents, rel, relocation, info); |
2469cfa2 NC |
1336 | |
1337 | if (r != bfd_reloc_ok) | |
1338 | { | |
1339 | const char *msg = (const char *) NULL; | |
1340 | ||
1341 | switch (r) | |
1342 | { | |
1343 | case bfd_reloc_overflow: | |
1344 | r = info->callbacks->reloc_overflow | |
13761a11 | 1345 | (info, (h ? &h->root : NULL), name, howto->name, |
dfeffb9f L |
1346 | (bfd_vma) 0, input_bfd, input_section, |
1347 | rel->r_offset); | |
2469cfa2 NC |
1348 | break; |
1349 | ||
1350 | case bfd_reloc_undefined: | |
1351 | r = info->callbacks->undefined_symbol | |
1352 | (info, name, input_bfd, input_section, rel->r_offset, TRUE); | |
1353 | break; | |
1354 | ||
1355 | case bfd_reloc_outofrange: | |
13761a11 | 1356 | msg = _("internal error: branch/jump to an odd address detected"); |
2469cfa2 NC |
1357 | break; |
1358 | ||
1359 | case bfd_reloc_notsupported: | |
1360 | msg = _("internal error: unsupported relocation error"); | |
1361 | break; | |
1362 | ||
1363 | case bfd_reloc_dangerous: | |
1364 | msg = _("internal error: dangerous relocation"); | |
1365 | break; | |
1366 | ||
1367 | default: | |
1368 | msg = _("internal error: unknown error"); | |
1369 | break; | |
1370 | } | |
1371 | ||
1372 | if (msg) | |
1373 | r = info->callbacks->warning | |
1374 | (info, msg, name, input_bfd, input_section, rel->r_offset); | |
1375 | ||
1376 | if (!r) | |
1377 | return FALSE; | |
1378 | } | |
1379 | ||
1380 | } | |
1381 | ||
1382 | return TRUE; | |
1383 | } | |
1384 | ||
1385 | /* The final processing done just before writing out a MSP430 ELF object | |
1386 | file. This gets the MSP430 architecture right based on the machine | |
1387 | number. */ | |
1388 | ||
1389 | static void | |
b18c562e NC |
1390 | bfd_elf_msp430_final_write_processing (bfd * abfd, |
1391 | bfd_boolean linker ATTRIBUTE_UNUSED) | |
2469cfa2 NC |
1392 | { |
1393 | unsigned long val; | |
1394 | ||
1395 | switch (bfd_get_mach (abfd)) | |
1396 | { | |
1397 | default: | |
13761a11 NC |
1398 | case bfd_mach_msp110: val = E_MSP430_MACH_MSP430x11x1; break; |
1399 | case bfd_mach_msp11: val = E_MSP430_MACH_MSP430x11; break; | |
1400 | case bfd_mach_msp12: val = E_MSP430_MACH_MSP430x12; break; | |
1401 | case bfd_mach_msp13: val = E_MSP430_MACH_MSP430x13; break; | |
1402 | case bfd_mach_msp14: val = E_MSP430_MACH_MSP430x14; break; | |
1403 | case bfd_mach_msp15: val = E_MSP430_MACH_MSP430x15; break; | |
1404 | case bfd_mach_msp16: val = E_MSP430_MACH_MSP430x16; break; | |
1405 | case bfd_mach_msp31: val = E_MSP430_MACH_MSP430x31; break; | |
1406 | case bfd_mach_msp32: val = E_MSP430_MACH_MSP430x32; break; | |
1407 | case bfd_mach_msp33: val = E_MSP430_MACH_MSP430x33; break; | |
1408 | case bfd_mach_msp41: val = E_MSP430_MACH_MSP430x41; break; | |
1409 | case bfd_mach_msp42: val = E_MSP430_MACH_MSP430x42; break; | |
1410 | case bfd_mach_msp43: val = E_MSP430_MACH_MSP430x43; break; | |
1411 | case bfd_mach_msp44: val = E_MSP430_MACH_MSP430x44; break; | |
1412 | case bfd_mach_msp20: val = E_MSP430_MACH_MSP430x20; break; | |
1413 | case bfd_mach_msp22: val = E_MSP430_MACH_MSP430x22; break; | |
1414 | case bfd_mach_msp23: val = E_MSP430_MACH_MSP430x23; break; | |
1415 | case bfd_mach_msp24: val = E_MSP430_MACH_MSP430x24; break; | |
1416 | case bfd_mach_msp26: val = E_MSP430_MACH_MSP430x26; break; | |
1417 | case bfd_mach_msp46: val = E_MSP430_MACH_MSP430x46; break; | |
1418 | case bfd_mach_msp47: val = E_MSP430_MACH_MSP430x47; break; | |
1419 | case bfd_mach_msp54: val = E_MSP430_MACH_MSP430x54; break; | |
1420 | case bfd_mach_msp430x: val = E_MSP430_MACH_MSP430X; break; | |
2469cfa2 NC |
1421 | } |
1422 | ||
1423 | elf_elfheader (abfd)->e_machine = EM_MSP430; | |
1424 | elf_elfheader (abfd)->e_flags &= ~EF_MSP430_MACH; | |
1425 | elf_elfheader (abfd)->e_flags |= val; | |
1426 | } | |
1427 | ||
1428 | /* Set the right machine number. */ | |
1429 | ||
1430 | static bfd_boolean | |
b18c562e | 1431 | elf32_msp430_object_p (bfd * abfd) |
2469cfa2 NC |
1432 | { |
1433 | int e_set = bfd_mach_msp14; | |
1434 | ||
1435 | if (elf_elfheader (abfd)->e_machine == EM_MSP430 | |
1436 | || elf_elfheader (abfd)->e_machine == EM_MSP430_OLD) | |
1437 | { | |
1438 | int e_mach = elf_elfheader (abfd)->e_flags & EF_MSP430_MACH; | |
1439 | ||
1440 | switch (e_mach) | |
1441 | { | |
1442 | default: | |
13761a11 NC |
1443 | case E_MSP430_MACH_MSP430x11: e_set = bfd_mach_msp11; break; |
1444 | case E_MSP430_MACH_MSP430x11x1: e_set = bfd_mach_msp110; break; | |
1445 | case E_MSP430_MACH_MSP430x12: e_set = bfd_mach_msp12; break; | |
1446 | case E_MSP430_MACH_MSP430x13: e_set = bfd_mach_msp13; break; | |
1447 | case E_MSP430_MACH_MSP430x14: e_set = bfd_mach_msp14; break; | |
1448 | case E_MSP430_MACH_MSP430x15: e_set = bfd_mach_msp15; break; | |
1449 | case E_MSP430_MACH_MSP430x16: e_set = bfd_mach_msp16; break; | |
1450 | case E_MSP430_MACH_MSP430x31: e_set = bfd_mach_msp31; break; | |
1451 | case E_MSP430_MACH_MSP430x32: e_set = bfd_mach_msp32; break; | |
1452 | case E_MSP430_MACH_MSP430x33: e_set = bfd_mach_msp33; break; | |
1453 | case E_MSP430_MACH_MSP430x41: e_set = bfd_mach_msp41; break; | |
1454 | case E_MSP430_MACH_MSP430x42: e_set = bfd_mach_msp42; break; | |
1455 | case E_MSP430_MACH_MSP430x43: e_set = bfd_mach_msp43; break; | |
1456 | case E_MSP430_MACH_MSP430x44: e_set = bfd_mach_msp44; break; | |
1457 | case E_MSP430_MACH_MSP430x20: e_set = bfd_mach_msp20; break; | |
1458 | case E_MSP430_MACH_MSP430x22: e_set = bfd_mach_msp22; break; | |
1459 | case E_MSP430_MACH_MSP430x23: e_set = bfd_mach_msp23; break; | |
1460 | case E_MSP430_MACH_MSP430x24: e_set = bfd_mach_msp24; break; | |
1461 | case E_MSP430_MACH_MSP430x26: e_set = bfd_mach_msp26; break; | |
1462 | case E_MSP430_MACH_MSP430x46: e_set = bfd_mach_msp46; break; | |
1463 | case E_MSP430_MACH_MSP430x47: e_set = bfd_mach_msp47; break; | |
1464 | case E_MSP430_MACH_MSP430x54: e_set = bfd_mach_msp54; break; | |
1465 | case E_MSP430_MACH_MSP430X: e_set = bfd_mach_msp430x; break; | |
2469cfa2 NC |
1466 | } |
1467 | } | |
1b786873 | 1468 | |
2469cfa2 NC |
1469 | return bfd_default_set_arch_mach (abfd, bfd_arch_msp430, e_set); |
1470 | } | |
1471 | ||
b18c562e NC |
1472 | /* These functions handle relaxing for the msp430. |
1473 | Relaxation required only in two cases: | |
1474 | - Bad hand coding like jumps from one section to another or | |
1475 | from file to file. | |
77bf820f | 1476 | - Sibling calls. This will affect only 'jump label' polymorph. Without |
b18c562e NC |
1477 | relaxing this enlarges code by 2 bytes. Sibcalls implemented but |
1478 | do not work in gcc's port by the reason I do not know. | |
13761a11 NC |
1479 | - To convert out of range conditional jump instructions (found inside |
1480 | a function) into inverted jumps over an unconditional branch instruction. | |
b18c562e NC |
1481 | Anyway, if a relaxation required, user should pass -relax option to the |
1482 | linker. | |
1483 | ||
1484 | There are quite a few relaxing opportunities available on the msp430: | |
1485 | ||
1486 | ================================================================ | |
1487 | ||
1488 | 1. 3 words -> 1 word | |
1489 | ||
1490 | eq == jeq label jne +4; br lab | |
1491 | ne != jne label jeq +4; br lab | |
1492 | lt < jl label jge +4; br lab | |
1493 | ltu < jlo label lhs +4; br lab | |
1494 | ge >= jge label jl +4; br lab | |
1495 | geu >= jhs label jlo +4; br lab | |
1496 | ||
1497 | 2. 4 words -> 1 word | |
1498 | ||
1499 | ltn < jn jn +2; jmp +4; br lab | |
1500 | ||
1501 | 3. 4 words -> 2 words | |
1502 | ||
1503 | gt > jeq +2; jge label jeq +6; jl +4; br label | |
1504 | gtu > jeq +2; jhs label jeq +6; jlo +4; br label | |
1505 | ||
1506 | 4. 4 words -> 2 words and 2 labels | |
1507 | ||
1508 | leu <= jeq label; jlo label jeq +2; jhs +4; br label | |
1509 | le <= jeq label; jl label jeq +2; jge +4; br label | |
1510 | ================================================================= | |
1511 | ||
1512 | codemap for first cases is (labels masked ): | |
1513 | eq: 0x2002,0x4010,0x0000 -> 0x2400 | |
1514 | ne: 0x2402,0x4010,0x0000 -> 0x2000 | |
1515 | lt: 0x3402,0x4010,0x0000 -> 0x3800 | |
1516 | ltu: 0x2c02,0x4010,0x0000 -> 0x2800 | |
1517 | ge: 0x3802,0x4010,0x0000 -> 0x3400 | |
1518 | geu: 0x2802,0x4010,0x0000 -> 0x2c00 | |
1519 | ||
1520 | second case: | |
1521 | ltn: 0x3001,0x3c02,0x4010,0x0000 -> 0x3000 | |
1522 | ||
1523 | third case: | |
1524 | gt: 0x2403,0x3802,0x4010,0x0000 -> 0x2401,0x3400 | |
1525 | gtu: 0x2403,0x2802,0x4010,0x0000 -> 0x2401,0x2c00 | |
1526 | ||
1527 | fourth case: | |
1528 | leu: 0x2401,0x2c02,0x4010,0x0000 -> 0x2400,0x2800 | |
1529 | le: 0x2401,0x3402,0x4010,0x0000 -> 0x2400,0x3800 | |
1530 | ||
1531 | Unspecified case :) | |
1532 | jump: 0x4010,0x0000 -> 0x3c00. */ | |
1533 | ||
1534 | #define NUMB_RELAX_CODES 12 | |
1535 | static struct rcodes_s | |
1536 | { | |
1537 | int f0, f1; /* From code. */ | |
1538 | int t0, t1; /* To code. */ | |
1539 | int labels; /* Position of labels: 1 - one label at first | |
1540 | word, 2 - one at second word, 3 - two | |
1541 | labels at both. */ | |
1542 | int cdx; /* Words to match. */ | |
1543 | int bs; /* Shrink bytes. */ | |
1544 | int off; /* Offset from old label for new code. */ | |
1545 | int ncl; /* New code length. */ | |
1546 | } rcode[] = | |
1547 | {/* lab,cdx,bs,off,ncl */ | |
1548 | { 0x0000, 0x0000, 0x3c00, 0x0000, 1, 0, 2, 2, 2}, /* jump */ | |
1549 | { 0x0000, 0x2002, 0x2400, 0x0000, 1, 1, 4, 4, 2}, /* eq */ | |
1550 | { 0x0000, 0x2402, 0x2000, 0x0000, 1, 1, 4, 4, 2}, /* ne */ | |
1551 | { 0x0000, 0x3402, 0x3800, 0x0000, 1, 1, 4, 4, 2}, /* lt */ | |
1552 | { 0x0000, 0x2c02, 0x2800, 0x0000, 1, 1, 4, 4, 2}, /* ltu */ | |
1553 | { 0x0000, 0x3802, 0x3400, 0x0000, 1, 1, 4, 4, 2}, /* ge */ | |
1554 | { 0x0000, 0x2802, 0x2c00, 0x0000, 1, 1, 4, 4, 2}, /* geu */ | |
1555 | { 0x3001, 0x3c02, 0x3000, 0x0000, 1, 2, 6, 6, 2}, /* ltn */ | |
1556 | { 0x2403, 0x3802, 0x2401, 0x3400, 2, 2, 4, 6, 4}, /* gt */ | |
1557 | { 0x2403, 0x2802, 0x2401, 0x2c00, 2, 2, 4, 6, 4}, /* gtu */ | |
1558 | { 0x2401, 0x2c02, 0x2400, 0x2800, 3, 2, 4, 6, 4}, /* leu , 2 labels */ | |
1559 | { 0x2401, 0x2c02, 0x2400, 0x2800, 3, 2, 4, 6, 4}, /* le , 2 labels */ | |
1560 | { 0, 0, 0, 0, 0, 0, 0, 0, 0} | |
1561 | }; | |
1562 | ||
1563 | /* Return TRUE if a symbol exists at the given address. */ | |
1564 | ||
1565 | static bfd_boolean | |
1566 | msp430_elf_symbol_address_p (bfd * abfd, | |
1567 | asection * sec, | |
1568 | Elf_Internal_Sym * isym, | |
1569 | bfd_vma addr) | |
1570 | { | |
1571 | Elf_Internal_Shdr *symtab_hdr; | |
1572 | unsigned int sec_shndx; | |
1573 | Elf_Internal_Sym *isymend; | |
1574 | struct elf_link_hash_entry **sym_hashes; | |
1575 | struct elf_link_hash_entry **end_hashes; | |
1576 | unsigned int symcount; | |
1577 | ||
1578 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); | |
1579 | ||
1580 | /* Examine all the local symbols. */ | |
1581 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1582 | for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++) | |
1583 | if (isym->st_shndx == sec_shndx && isym->st_value == addr) | |
1584 | return TRUE; | |
1585 | ||
1586 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) | |
1587 | - symtab_hdr->sh_info); | |
1588 | sym_hashes = elf_sym_hashes (abfd); | |
1589 | end_hashes = sym_hashes + symcount; | |
1590 | for (; sym_hashes < end_hashes; sym_hashes++) | |
1591 | { | |
1592 | struct elf_link_hash_entry *sym_hash = *sym_hashes; | |
1593 | ||
1594 | if ((sym_hash->root.type == bfd_link_hash_defined | |
1595 | || sym_hash->root.type == bfd_link_hash_defweak) | |
1596 | && sym_hash->root.u.def.section == sec | |
1597 | && sym_hash->root.u.def.value == addr) | |
1598 | return TRUE; | |
1599 | } | |
1600 | ||
1601 | return FALSE; | |
1602 | } | |
1603 | ||
13761a11 NC |
1604 | /* Adjust all local symbols defined as '.section + 0xXXXX' (.section has |
1605 | sec_shndx) referenced from current and other sections. */ | |
1606 | ||
046aeb74 | 1607 | static bfd_boolean |
13761a11 NC |
1608 | msp430_elf_relax_adjust_locals (bfd * abfd, asection * sec, bfd_vma addr, |
1609 | int count, unsigned int sec_shndx, | |
1610 | bfd_vma toaddr) | |
046aeb74 DD |
1611 | { |
1612 | Elf_Internal_Shdr *symtab_hdr; | |
1613 | Elf_Internal_Rela *irel; | |
1614 | Elf_Internal_Rela *irelend; | |
1615 | Elf_Internal_Sym *isym; | |
1616 | ||
1617 | irel = elf_section_data (sec)->relocs; | |
13761a11 NC |
1618 | if (irel == NULL) |
1619 | return TRUE; | |
1620 | ||
046aeb74 DD |
1621 | irelend = irel + sec->reloc_count; |
1622 | symtab_hdr = & elf_tdata (abfd)->symtab_hdr; | |
1623 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; | |
bceec4b9 | 1624 | |
13761a11 | 1625 | for (;irel < irelend; irel++) |
046aeb74 | 1626 | { |
bceec4b9 | 1627 | unsigned int sidx = ELF32_R_SYM(irel->r_info); |
046aeb74 | 1628 | Elf_Internal_Sym *lsym = isym + sidx; |
bceec4b9 | 1629 | |
1ade7175 | 1630 | /* Adjust symbols referenced by .sec+0xXX. */ |
bceec4b9 DD |
1631 | if (irel->r_addend > addr && irel->r_addend < toaddr |
1632 | && sidx < symtab_hdr->sh_info | |
046aeb74 DD |
1633 | && lsym->st_shndx == sec_shndx) |
1634 | irel->r_addend -= count; | |
1635 | } | |
1b786873 | 1636 | |
046aeb74 DD |
1637 | return TRUE; |
1638 | } | |
1639 | ||
b18c562e NC |
1640 | /* Delete some bytes from a section while relaxing. */ |
1641 | ||
1642 | static bfd_boolean | |
1643 | msp430_elf_relax_delete_bytes (bfd * abfd, asection * sec, bfd_vma addr, | |
1644 | int count) | |
1645 | { | |
1646 | Elf_Internal_Shdr *symtab_hdr; | |
1647 | unsigned int sec_shndx; | |
1648 | bfd_byte *contents; | |
1649 | Elf_Internal_Rela *irel; | |
1650 | Elf_Internal_Rela *irelend; | |
b18c562e NC |
1651 | bfd_vma toaddr; |
1652 | Elf_Internal_Sym *isym; | |
1653 | Elf_Internal_Sym *isymend; | |
1654 | struct elf_link_hash_entry **sym_hashes; | |
1655 | struct elf_link_hash_entry **end_hashes; | |
1656 | unsigned int symcount; | |
046aeb74 | 1657 | asection *p; |
b18c562e NC |
1658 | |
1659 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); | |
1660 | ||
1661 | contents = elf_section_data (sec)->this_hdr.contents; | |
1662 | ||
b18c562e NC |
1663 | toaddr = sec->size; |
1664 | ||
1665 | irel = elf_section_data (sec)->relocs; | |
1666 | irelend = irel + sec->reloc_count; | |
1667 | ||
1668 | /* Actually delete the bytes. */ | |
1669 | memmove (contents + addr, contents + addr + count, | |
1670 | (size_t) (toaddr - addr - count)); | |
1671 | sec->size -= count; | |
1672 | ||
1673 | /* Adjust all the relocs. */ | |
fa9ee72b DD |
1674 | symtab_hdr = & elf_tdata (abfd)->symtab_hdr; |
1675 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; | |
13761a11 | 1676 | for (; irel < irelend; irel++) |
fa9ee72b | 1677 | { |
fa9ee72b DD |
1678 | /* Get the new reloc address. */ |
1679 | if ((irel->r_offset > addr && irel->r_offset < toaddr)) | |
1680 | irel->r_offset -= count; | |
fa9ee72b | 1681 | } |
b18c562e | 1682 | |
046aeb74 | 1683 | for (p = abfd->sections; p != NULL; p = p->next) |
13761a11 | 1684 | msp430_elf_relax_adjust_locals (abfd,p,addr,count,sec_shndx,toaddr); |
1b786873 | 1685 | |
b18c562e NC |
1686 | /* Adjust the local symbols defined in this section. */ |
1687 | symtab_hdr = & elf_tdata (abfd)->symtab_hdr; | |
1688 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; | |
1689 | for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++) | |
0f8f0c57 NC |
1690 | { |
1691 | const char * name; | |
1692 | ||
1693 | name = bfd_elf_string_from_elf_section | |
1694 | (abfd, symtab_hdr->sh_link, isym->st_name); | |
1695 | name = (name == NULL || * name == 0) ? bfd_section_name (abfd, sec) : name; | |
1696 | ||
1697 | if (isym->st_shndx != sec_shndx) | |
1698 | continue; | |
1b786873 | 1699 | |
0f8f0c57 NC |
1700 | if (isym->st_value > addr |
1701 | && (isym->st_value < toaddr | |
1702 | /* We also adjust a symbol at the end of the section if its name is | |
1703 | on the list below. These symbols are used for debug info | |
1704 | generation and they refer to the end of the current section, not | |
1705 | the start of the next section. */ | |
1706 | || (isym->st_value == toaddr | |
1707 | && name != NULL | |
1708 | && (CONST_STRNEQ (name, ".Letext") | |
1709 | || CONST_STRNEQ (name, ".LFE"))))) | |
1710 | { | |
1711 | if (isym->st_value < addr + count) | |
1712 | isym->st_value = addr; | |
1713 | else | |
1714 | isym->st_value -= count; | |
1715 | } | |
1716 | /* Adjust the function symbol's size as well. */ | |
1717 | else if (ELF_ST_TYPE (isym->st_info) == STT_FUNC | |
1718 | && isym->st_value + isym->st_size > addr | |
1719 | && isym->st_value + isym->st_size < toaddr) | |
1720 | isym->st_size -= count; | |
1721 | } | |
b18c562e NC |
1722 | |
1723 | /* Now adjust the global symbols defined in this section. */ | |
1724 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) | |
1725 | - symtab_hdr->sh_info); | |
1726 | sym_hashes = elf_sym_hashes (abfd); | |
1727 | end_hashes = sym_hashes + symcount; | |
1728 | for (; sym_hashes < end_hashes; sym_hashes++) | |
1729 | { | |
1730 | struct elf_link_hash_entry *sym_hash = *sym_hashes; | |
1731 | ||
1732 | if ((sym_hash->root.type == bfd_link_hash_defined | |
1733 | || sym_hash->root.type == bfd_link_hash_defweak) | |
1734 | && sym_hash->root.u.def.section == sec | |
1735 | && sym_hash->root.u.def.value > addr | |
1736 | && sym_hash->root.u.def.value < toaddr) | |
0f8f0c57 NC |
1737 | { |
1738 | if (sym_hash->root.u.def.value < addr + count) | |
1739 | sym_hash->root.u.def.value = addr; | |
1740 | else | |
1741 | sym_hash->root.u.def.value -= count; | |
1742 | } | |
1743 | /* Adjust the function symbol's size as well. */ | |
1744 | else if (sym_hash->root.type == bfd_link_hash_defined | |
1745 | && sym_hash->root.u.def.section == sec | |
1746 | && sym_hash->type == STT_FUNC | |
1747 | && sym_hash->root.u.def.value + sym_hash->size > addr | |
1748 | && sym_hash->root.u.def.value + sym_hash->size < toaddr) | |
1749 | sym_hash->size -= count; | |
b18c562e NC |
1750 | } |
1751 | ||
1752 | return TRUE; | |
1753 | } | |
1754 | ||
13761a11 NC |
1755 | /* Insert two words into a section whilst relaxing. */ |
1756 | ||
1757 | static bfd_byte * | |
1758 | msp430_elf_relax_add_two_words (bfd * abfd, asection * sec, bfd_vma addr, | |
1759 | int word1, int word2) | |
1760 | { | |
1761 | Elf_Internal_Shdr *symtab_hdr; | |
1762 | unsigned int sec_shndx; | |
1763 | bfd_byte *contents; | |
1764 | Elf_Internal_Rela *irel; | |
1765 | Elf_Internal_Rela *irelend; | |
1766 | Elf_Internal_Sym *isym; | |
1767 | Elf_Internal_Sym *isymend; | |
1768 | struct elf_link_hash_entry **sym_hashes; | |
1769 | struct elf_link_hash_entry **end_hashes; | |
1770 | unsigned int symcount; | |
1771 | bfd_vma sec_end; | |
1772 | asection *p; | |
1773 | ||
1774 | contents = elf_section_data (sec)->this_hdr.contents; | |
1775 | sec_end = sec->size; | |
1776 | ||
1777 | /* Make space for the new words. */ | |
1778 | contents = bfd_realloc (contents, sec_end + 4); | |
1779 | memmove (contents + addr + 4, contents + addr, sec_end - addr); | |
1780 | ||
1781 | /* Insert the new words. */ | |
1782 | bfd_put_16 (abfd, word1, contents + addr); | |
1783 | bfd_put_16 (abfd, word2, contents + addr + 2); | |
1784 | ||
1785 | /* Update the section information. */ | |
1786 | sec->size += 4; | |
1b786873 | 1787 | elf_section_data (sec)->this_hdr.contents = contents; |
13761a11 NC |
1788 | |
1789 | /* Adjust all the relocs. */ | |
1790 | irel = elf_section_data (sec)->relocs; | |
1791 | irelend = irel + sec->reloc_count; | |
1792 | ||
1793 | for (; irel < irelend; irel++) | |
1794 | if ((irel->r_offset >= addr && irel->r_offset < sec_end)) | |
1795 | irel->r_offset += 4; | |
1796 | ||
1797 | /* Adjust the local symbols defined in this section. */ | |
1798 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); | |
1799 | for (p = abfd->sections; p != NULL; p = p->next) | |
1800 | msp430_elf_relax_adjust_locals (abfd, p, addr, -4, | |
1801 | sec_shndx, sec_end); | |
1802 | ||
1803 | /* Adjust the global symbols affected by the move. */ | |
1804 | symtab_hdr = & elf_tdata (abfd)->symtab_hdr; | |
1805 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; | |
1806 | for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++) | |
1807 | if (isym->st_shndx == sec_shndx | |
1808 | && isym->st_value >= addr && isym->st_value < sec_end) | |
1809 | isym->st_value += 4; | |
1810 | ||
1811 | /* Now adjust the global symbols defined in this section. */ | |
1812 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) | |
1813 | - symtab_hdr->sh_info); | |
1814 | sym_hashes = elf_sym_hashes (abfd); | |
1815 | end_hashes = sym_hashes + symcount; | |
1816 | for (; sym_hashes < end_hashes; sym_hashes++) | |
1817 | { | |
1818 | struct elf_link_hash_entry *sym_hash = *sym_hashes; | |
1819 | ||
1820 | if ((sym_hash->root.type == bfd_link_hash_defined | |
1821 | || sym_hash->root.type == bfd_link_hash_defweak) | |
1822 | && sym_hash->root.u.def.section == sec | |
1823 | && sym_hash->root.u.def.value >= addr | |
1824 | && sym_hash->root.u.def.value < sec_end) | |
1825 | sym_hash->root.u.def.value += 4; | |
1826 | } | |
1827 | ||
1828 | return contents; | |
1829 | } | |
1b786873 | 1830 | |
b18c562e NC |
1831 | static bfd_boolean |
1832 | msp430_elf_relax_section (bfd * abfd, asection * sec, | |
1833 | struct bfd_link_info * link_info, | |
1834 | bfd_boolean * again) | |
1835 | { | |
1836 | Elf_Internal_Shdr * symtab_hdr; | |
1837 | Elf_Internal_Rela * internal_relocs; | |
1838 | Elf_Internal_Rela * irel; | |
1839 | Elf_Internal_Rela * irelend; | |
1840 | bfd_byte * contents = NULL; | |
1841 | Elf_Internal_Sym * isymbuf = NULL; | |
1842 | ||
1843 | /* Assume nothing changes. */ | |
1844 | *again = FALSE; | |
1845 | ||
1846 | /* We don't have to do anything for a relocatable link, if | |
1847 | this section does not have relocs, or if this is not a | |
1848 | code section. */ | |
0e1862bb | 1849 | if (bfd_link_relocatable (link_info) |
13761a11 NC |
1850 | || (sec->flags & SEC_RELOC) == 0 |
1851 | || sec->reloc_count == 0 || (sec->flags & SEC_CODE) == 0) | |
b18c562e NC |
1852 | return TRUE; |
1853 | ||
1854 | symtab_hdr = & elf_tdata (abfd)->symtab_hdr; | |
1855 | ||
1856 | /* Get a copy of the native relocations. */ | |
1857 | internal_relocs = | |
1858 | _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, link_info->keep_memory); | |
1859 | if (internal_relocs == NULL) | |
1860 | goto error_return; | |
1861 | ||
1862 | /* Walk through them looking for relaxing opportunities. */ | |
1863 | irelend = internal_relocs + sec->reloc_count; | |
13761a11 NC |
1864 | |
1865 | /* Do code size growing relocs first. */ | |
b18c562e NC |
1866 | for (irel = internal_relocs; irel < irelend; irel++) |
1867 | { | |
1868 | bfd_vma symval; | |
1869 | ||
1870 | /* If this isn't something that can be relaxed, then ignore | |
1871 | this reloc. */ | |
13761a11 NC |
1872 | if (uses_msp430x_relocs (abfd) |
1873 | && ELF32_R_TYPE (irel->r_info) == (int) R_MSP430X_10_PCREL) | |
1874 | ; | |
1875 | else if (! uses_msp430x_relocs (abfd) | |
1876 | && ELF32_R_TYPE (irel->r_info) == (int) R_MSP430_10_PCREL) | |
1877 | ; | |
1878 | else | |
b18c562e NC |
1879 | continue; |
1880 | ||
1881 | /* Get the section contents if we haven't done so already. */ | |
1882 | if (contents == NULL) | |
1883 | { | |
1884 | /* Get cached copy if it exists. */ | |
1885 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1886 | contents = elf_section_data (sec)->this_hdr.contents; | |
1887 | else if (! bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1888 | goto error_return; | |
1889 | } | |
1890 | ||
1891 | /* Read this BFD's local symbols if we haven't done so already. */ | |
1892 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) | |
1893 | { | |
1894 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
1895 | if (isymbuf == NULL) | |
1896 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
1897 | symtab_hdr->sh_info, 0, | |
1898 | NULL, NULL, NULL); | |
1899 | if (isymbuf == NULL) | |
1900 | goto error_return; | |
1901 | } | |
1902 | ||
1903 | /* Get the value of the symbol referred to by the reloc. */ | |
1904 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
1905 | { | |
1906 | /* A local symbol. */ | |
1907 | Elf_Internal_Sym *isym; | |
1908 | asection *sym_sec; | |
1909 | ||
1910 | isym = isymbuf + ELF32_R_SYM (irel->r_info); | |
1911 | if (isym->st_shndx == SHN_UNDEF) | |
1912 | sym_sec = bfd_und_section_ptr; | |
1913 | else if (isym->st_shndx == SHN_ABS) | |
1914 | sym_sec = bfd_abs_section_ptr; | |
1915 | else if (isym->st_shndx == SHN_COMMON) | |
1916 | sym_sec = bfd_com_section_ptr; | |
1917 | else | |
1918 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
1919 | symval = (isym->st_value | |
1920 | + sym_sec->output_section->vma + sym_sec->output_offset); | |
1921 | } | |
1922 | else | |
1923 | { | |
1924 | unsigned long indx; | |
1925 | struct elf_link_hash_entry *h; | |
1926 | ||
1927 | /* An external symbol. */ | |
1928 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; | |
1929 | h = elf_sym_hashes (abfd)[indx]; | |
1930 | BFD_ASSERT (h != NULL); | |
1931 | ||
1932 | if (h->root.type != bfd_link_hash_defined | |
1933 | && h->root.type != bfd_link_hash_defweak) | |
1934 | /* This appears to be a reference to an undefined | |
1935 | symbol. Just ignore it--it will be caught by the | |
1936 | regular reloc processing. */ | |
1937 | continue; | |
1938 | ||
1939 | symval = (h->root.u.def.value | |
1940 | + h->root.u.def.section->output_section->vma | |
1941 | + h->root.u.def.section->output_offset); | |
1942 | } | |
1943 | ||
1944 | /* For simplicity of coding, we are going to modify the section | |
1945 | contents, the section relocs, and the BFD symbol table. We | |
1946 | must tell the rest of the code not to free up this | |
1947 | information. It would be possible to instead create a table | |
1948 | of changes which have to be made, as is done in coff-mips.c; | |
1949 | that would be more work, but would require less memory when | |
1950 | the linker is run. */ | |
1951 | ||
13761a11 NC |
1952 | bfd_signed_vma value = symval; |
1953 | int opcode; | |
b18c562e | 1954 | |
13761a11 NC |
1955 | /* Compute the value that will be relocated. */ |
1956 | value += irel->r_addend; | |
1957 | /* Convert to PC relative. */ | |
1958 | value -= (sec->output_section->vma + sec->output_offset); | |
1959 | value -= irel->r_offset; | |
1960 | value -= 2; | |
1961 | /* Scale. */ | |
1962 | value >>= 1; | |
b18c562e | 1963 | |
13761a11 NC |
1964 | /* If it is in range then no modifications are needed. */ |
1965 | if (value >= -512 && value <= 511) | |
1966 | continue; | |
b18c562e | 1967 | |
13761a11 NC |
1968 | /* Get the opcode. */ |
1969 | opcode = bfd_get_16 (abfd, contents + irel->r_offset); | |
1b786873 | 1970 | |
13761a11 NC |
1971 | /* Compute the new opcode. We are going to convert: |
1972 | J<cond> label | |
1973 | into: | |
1974 | J<inv-cond> 1f | |
1975 | BR[A] #label | |
1976 | 1: */ | |
1977 | switch (opcode & 0xfc00) | |
1978 | { | |
1b786873 | 1979 | case 0x3800: opcode = 0x3402; break; /* Jl -> Jge +2 */ |
13761a11 NC |
1980 | case 0x3400: opcode = 0x3802; break; /* Jge -> Jl +2 */ |
1981 | case 0x2c00: opcode = 0x2802; break; /* Jhs -> Jlo +2 */ | |
1982 | case 0x2800: opcode = 0x2c02; break; /* Jlo -> Jhs +2 */ | |
1983 | case 0x2400: opcode = 0x2002; break; /* Jeq -> Jne +2 */ | |
1984 | case 0x2000: opcode = 0x2402; break; /* jne -> Jeq +2 */ | |
1985 | case 0x3000: /* jn */ | |
1986 | /* There is no direct inverse of the Jn insn. | |
1987 | FIXME: we could do this as: | |
1988 | Jn 1f | |
1989 | br 2f | |
1990 | 1: br label | |
1991 | 2: */ | |
1992 | continue; | |
1993 | default: | |
1994 | /* Not a conditional branch instruction. */ | |
1995 | /* fprintf (stderr, "unrecog: %x\n", opcode); */ | |
2d071cfc | 1996 | continue; |
13761a11 | 1997 | } |
b18c562e | 1998 | |
13761a11 NC |
1999 | /* Note that we've changed the relocs, section contents, etc. */ |
2000 | elf_section_data (sec)->relocs = internal_relocs; | |
2001 | elf_section_data (sec)->this_hdr.contents = contents; | |
2002 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
b18c562e | 2003 | |
13761a11 NC |
2004 | /* Install the new opcode. */ |
2005 | bfd_put_16 (abfd, opcode, contents + irel->r_offset); | |
b18c562e | 2006 | |
13761a11 NC |
2007 | /* Insert the new branch instruction. */ |
2008 | if (uses_msp430x_relocs (abfd)) | |
2009 | { | |
1b786873 | 2010 | /* Insert an absolute branch (aka MOVA) instruction. */ |
13761a11 NC |
2011 | contents = msp430_elf_relax_add_two_words |
2012 | (abfd, sec, irel->r_offset + 2, 0x0080, 0x0000); | |
2013 | ||
2014 | /* Update the relocation to point to the inserted branch | |
2015 | instruction. Note - we are changing a PC-relative reloc | |
2016 | into an absolute reloc, but this is OK because we have | |
2017 | arranged with the assembler to have the reloc's value be | |
2018 | a (local) symbol, not a section+offset value. */ | |
2019 | irel->r_offset += 2; | |
2020 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
2021 | R_MSP430X_ABS20_ADR_SRC); | |
2022 | } | |
2023 | else | |
2024 | { | |
2025 | contents = msp430_elf_relax_add_two_words | |
2026 | (abfd, sec, irel->r_offset + 2, 0x4030, 0x0000); | |
2027 | ||
2028 | /* See comment above about converting a 10-bit PC-rel | |
2029 | relocation into a 16-bit absolute relocation. */ | |
2030 | irel->r_offset += 4; | |
2031 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
2032 | R_MSP430_16); | |
2033 | } | |
b18c562e | 2034 | |
13761a11 NC |
2035 | /* Growing the section may mean that other |
2036 | conditional branches need to be fixed. */ | |
2037 | *again = TRUE; | |
2038 | } | |
b18c562e | 2039 | |
13761a11 NC |
2040 | for (irel = internal_relocs; irel < irelend; irel++) |
2041 | { | |
2042 | bfd_vma symval; | |
2043 | ||
2044 | /* Get the section contents if we haven't done so already. */ | |
2045 | if (contents == NULL) | |
2046 | { | |
2047 | /* Get cached copy if it exists. */ | |
2048 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
2049 | contents = elf_section_data (sec)->this_hdr.contents; | |
2050 | else if (! bfd_malloc_and_get_section (abfd, sec, &contents)) | |
2051 | goto error_return; | |
2052 | } | |
2053 | ||
2054 | /* Read this BFD's local symbols if we haven't done so already. */ | |
2055 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) | |
2056 | { | |
2057 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
2058 | if (isymbuf == NULL) | |
2059 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
2060 | symtab_hdr->sh_info, 0, | |
2061 | NULL, NULL, NULL); | |
2062 | if (isymbuf == NULL) | |
2063 | goto error_return; | |
2064 | } | |
2065 | ||
2066 | /* Get the value of the symbol referred to by the reloc. */ | |
2067 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
2068 | { | |
2069 | /* A local symbol. */ | |
2070 | Elf_Internal_Sym *isym; | |
2071 | asection *sym_sec; | |
2072 | ||
2073 | isym = isymbuf + ELF32_R_SYM (irel->r_info); | |
2074 | if (isym->st_shndx == SHN_UNDEF) | |
2075 | sym_sec = bfd_und_section_ptr; | |
2076 | else if (isym->st_shndx == SHN_ABS) | |
2077 | sym_sec = bfd_abs_section_ptr; | |
2078 | else if (isym->st_shndx == SHN_COMMON) | |
2079 | sym_sec = bfd_com_section_ptr; | |
2080 | else | |
2081 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
2082 | symval = (isym->st_value | |
2083 | + sym_sec->output_section->vma + sym_sec->output_offset); | |
2084 | } | |
2085 | else | |
2086 | { | |
2087 | unsigned long indx; | |
2088 | struct elf_link_hash_entry *h; | |
2089 | ||
2090 | /* An external symbol. */ | |
2091 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; | |
2092 | h = elf_sym_hashes (abfd)[indx]; | |
2093 | BFD_ASSERT (h != NULL); | |
2094 | ||
2095 | if (h->root.type != bfd_link_hash_defined | |
2096 | && h->root.type != bfd_link_hash_defweak) | |
2097 | /* This appears to be a reference to an undefined | |
2098 | symbol. Just ignore it--it will be caught by the | |
2099 | regular reloc processing. */ | |
2100 | continue; | |
2101 | ||
2102 | symval = (h->root.u.def.value | |
2103 | + h->root.u.def.section->output_section->vma | |
2104 | + h->root.u.def.section->output_offset); | |
2105 | } | |
2106 | ||
2107 | /* For simplicity of coding, we are going to modify the section | |
2108 | contents, the section relocs, and the BFD symbol table. We | |
2109 | must tell the rest of the code not to free up this | |
2110 | information. It would be possible to instead create a table | |
2111 | of changes which have to be made, as is done in coff-mips.c; | |
2112 | that would be more work, but would require less memory when | |
2113 | the linker is run. */ | |
2114 | ||
2115 | /* Try to turn a 16bit pc-relative branch into a 10bit pc-relative | |
2116 | branch. */ | |
1b786873 | 2117 | /* Paranoia? paranoia... */ |
23d4663e NC |
2118 | if (! uses_msp430x_relocs (abfd) |
2119 | && ELF32_R_TYPE (irel->r_info) == (int) R_MSP430_RL_PCREL) | |
13761a11 NC |
2120 | { |
2121 | bfd_vma value = symval; | |
2122 | ||
2123 | /* Deal with pc-relative gunk. */ | |
2124 | value -= (sec->output_section->vma + sec->output_offset); | |
2125 | value -= irel->r_offset; | |
2126 | value += irel->r_addend; | |
2127 | ||
2128 | /* See if the value will fit in 10 bits, note the high value is | |
2129 | 1016 as the target will be two bytes closer if we are | |
2130 | able to relax. */ | |
2131 | if ((long) value < 1016 && (long) value > -1016) | |
2132 | { | |
2133 | int code0 = 0, code1 = 0, code2 = 0; | |
2134 | int i; | |
2135 | struct rcodes_s *rx; | |
2136 | ||
2137 | /* Get the opcode. */ | |
2138 | if (irel->r_offset >= 6) | |
2139 | code0 = bfd_get_16 (abfd, contents + irel->r_offset - 6); | |
2140 | ||
2141 | if (irel->r_offset >= 4) | |
2142 | code1 = bfd_get_16 (abfd, contents + irel->r_offset - 4); | |
2143 | ||
2144 | code2 = bfd_get_16 (abfd, contents + irel->r_offset - 2); | |
2145 | ||
2146 | if (code2 != 0x4010) | |
2147 | continue; | |
2148 | ||
2149 | /* Check r4 and r3. */ | |
2150 | for (i = NUMB_RELAX_CODES - 1; i >= 0; i--) | |
2151 | { | |
2152 | rx = &rcode[i]; | |
2153 | if (rx->cdx == 2 && rx->f0 == code0 && rx->f1 == code1) | |
2154 | break; | |
2155 | else if (rx->cdx == 1 && rx->f1 == code1) | |
2156 | break; | |
2157 | else if (rx->cdx == 0) /* This is an unconditional jump. */ | |
2158 | break; | |
2159 | } | |
2160 | ||
2161 | /* Check labels: | |
b18c562e | 2162 | .Label0: ; we do not care about this label |
13761a11 | 2163 | jeq +6 |
b18c562e | 2164 | .Label1: ; make sure there is no label here |
13761a11 | 2165 | jl +4 |
b18c562e | 2166 | .Label2: ; make sure there is no label here |
13761a11 NC |
2167 | br .Label_dst |
2168 | ||
2169 | So, if there is .Label1 or .Label2 we cannot relax this code. | |
2170 | This actually should not happen, cause for relaxable | |
2171 | instructions we use RL_PCREL reloc instead of 16_PCREL. | |
2172 | Will change this in the future. */ | |
2173 | ||
2174 | if (rx->cdx > 0 | |
2175 | && msp430_elf_symbol_address_p (abfd, sec, isymbuf, | |
2176 | irel->r_offset - 2)) | |
2177 | continue; | |
2178 | if (rx->cdx > 1 | |
2179 | && msp430_elf_symbol_address_p (abfd, sec, isymbuf, | |
2180 | irel->r_offset - 4)) | |
2181 | continue; | |
2182 | ||
2183 | /* Note that we've changed the relocs, section contents, etc. */ | |
2184 | elf_section_data (sec)->relocs = internal_relocs; | |
2185 | elf_section_data (sec)->this_hdr.contents = contents; | |
2186 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
2187 | ||
2188 | /* Fix the relocation's type. */ | |
2189 | if (uses_msp430x_relocs (abfd)) | |
2190 | { | |
2191 | if (rx->labels == 3) /* Handle special cases. */ | |
2192 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
2193 | R_MSP430X_2X_PCREL); | |
2194 | else | |
2195 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
2196 | R_MSP430X_10_PCREL); | |
2197 | } | |
2198 | else | |
2199 | { | |
2200 | if (rx->labels == 3) /* Handle special cases. */ | |
2201 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
2202 | R_MSP430_2X_PCREL); | |
2203 | else | |
2204 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
2205 | R_MSP430_10_PCREL); | |
2206 | } | |
2207 | ||
2208 | /* Fix the opcode right way. */ | |
2209 | bfd_put_16 (abfd, rx->t0, contents + irel->r_offset - rx->off); | |
2210 | if (rx->t1) | |
2211 | bfd_put_16 (abfd, rx->t1, | |
2212 | contents + irel->r_offset - rx->off + 2); | |
2213 | ||
2214 | /* Delete bytes. */ | |
2215 | if (!msp430_elf_relax_delete_bytes (abfd, sec, | |
2216 | irel->r_offset - rx->off + | |
2217 | rx->ncl, rx->bs)) | |
2218 | goto error_return; | |
2219 | ||
2220 | /* Handle unconditional jumps. */ | |
2221 | if (rx->cdx == 0) | |
2222 | irel->r_offset -= 2; | |
2223 | ||
2224 | /* That will change things, so, we should relax again. | |
2225 | Note that this is not required, and it may be slow. */ | |
2226 | *again = TRUE; | |
2227 | } | |
2228 | } | |
23d4663e NC |
2229 | |
2230 | /* Try to turn a 16-bit absolute branch into a 10-bit pc-relative | |
2231 | branch. */ | |
2232 | if (uses_msp430x_relocs (abfd) | |
2233 | && ELF32_R_TYPE (irel->r_info) == R_MSP430X_ABS16) | |
2234 | { | |
2235 | bfd_vma value = symval; | |
2236 | ||
2d071cfc | 2237 | value -= (sec->output_section->vma + sec->output_offset); |
23d4663e NC |
2238 | value -= irel->r_offset; |
2239 | value += irel->r_addend; | |
1b786873 | 2240 | |
23d4663e NC |
2241 | /* See if the value will fit in 10 bits, note the high value is |
2242 | 1016 as the target will be two bytes closer if we are | |
2243 | able to relax. */ | |
2244 | if ((long) value < 1016 && (long) value > -1016) | |
2245 | { | |
2246 | int code2; | |
2247 | ||
2248 | /* Get the opcode. */ | |
2249 | code2 = bfd_get_16 (abfd, contents + irel->r_offset - 2); | |
2250 | if (code2 != 0x4030) | |
2251 | continue; | |
2252 | /* FIXME: check r4 and r3 ? */ | |
2253 | /* FIXME: Handle 0x4010 as well ? */ | |
2254 | ||
2255 | /* Note that we've changed the relocs, section contents, etc. */ | |
2256 | elf_section_data (sec)->relocs = internal_relocs; | |
2257 | elf_section_data (sec)->this_hdr.contents = contents; | |
2258 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
2259 | ||
2260 | /* Fix the relocation's type. */ | |
2261 | if (uses_msp430x_relocs (abfd)) | |
2262 | { | |
2263 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
2264 | R_MSP430X_10_PCREL); | |
2265 | } | |
2266 | else | |
2267 | { | |
2268 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
2269 | R_MSP430_10_PCREL); | |
2270 | } | |
2271 | ||
2272 | /* Fix the opcode right way. */ | |
2273 | bfd_put_16 (abfd, 0x3c00, contents + irel->r_offset - 2); | |
2274 | irel->r_offset -= 2; | |
2275 | ||
2276 | /* Delete bytes. */ | |
2277 | if (!msp430_elf_relax_delete_bytes (abfd, sec, | |
2278 | irel->r_offset + 2, 2)) | |
2279 | goto error_return; | |
2280 | ||
2281 | /* That will change things, so, we should relax again. | |
2282 | Note that this is not required, and it may be slow. */ | |
2283 | *again = TRUE; | |
2284 | } | |
2285 | } | |
13761a11 | 2286 | } |
b18c562e NC |
2287 | |
2288 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) | |
2289 | { | |
2290 | if (!link_info->keep_memory) | |
2291 | free (isymbuf); | |
2292 | else | |
2293 | { | |
2294 | /* Cache the symbols for elf_link_input_bfd. */ | |
2295 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
2296 | } | |
2297 | } | |
2298 | ||
2299 | if (contents != NULL | |
2300 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2301 | { | |
2302 | if (!link_info->keep_memory) | |
2303 | free (contents); | |
2304 | else | |
2305 | { | |
2306 | /* Cache the section contents for elf_link_input_bfd. */ | |
2307 | elf_section_data (sec)->this_hdr.contents = contents; | |
2308 | } | |
2309 | } | |
2310 | ||
2311 | if (internal_relocs != NULL | |
2312 | && elf_section_data (sec)->relocs != internal_relocs) | |
2313 | free (internal_relocs); | |
2314 | ||
2315 | return TRUE; | |
2316 | ||
2317 | error_return: | |
2318 | if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf) | |
2319 | free (isymbuf); | |
2320 | if (contents != NULL | |
2321 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2322 | free (contents); | |
2323 | if (internal_relocs != NULL | |
2324 | && elf_section_data (sec)->relocs != internal_relocs) | |
2325 | free (internal_relocs); | |
2326 | ||
2327 | return FALSE; | |
2328 | } | |
2329 | ||
13761a11 NC |
2330 | /* Handle an MSP430 specific section when reading an object file. |
2331 | This is called when bfd_section_from_shdr finds a section with | |
2332 | an unknown type. */ | |
2333 | ||
2334 | static bfd_boolean | |
2335 | elf32_msp430_section_from_shdr (bfd *abfd, | |
2336 | Elf_Internal_Shdr * hdr, | |
2337 | const char *name, | |
2338 | int shindex) | |
2339 | { | |
2340 | switch (hdr->sh_type) | |
2341 | { | |
2342 | case SHT_MSP430_SEC_FLAGS: | |
2343 | case SHT_MSP430_SYM_ALIASES: | |
2344 | case SHT_MSP430_ATTRIBUTES: | |
2345 | return _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex); | |
2346 | default: | |
2347 | return FALSE; | |
2348 | } | |
2349 | } | |
2350 | ||
2351 | static bfd_boolean | |
2352 | elf32_msp430_obj_attrs_handle_unknown (bfd *abfd, int tag) | |
2353 | { | |
2354 | _bfd_error_handler | |
2355 | (_("Warning: %B: Unknown MSPABI object attribute %d"), | |
2356 | abfd, tag); | |
2357 | return TRUE; | |
2358 | } | |
2359 | ||
2360 | /* Determine whether an object attribute tag takes an integer, a | |
2361 | string or both. */ | |
2362 | ||
2363 | static int | |
2364 | elf32_msp430_obj_attrs_arg_type (int tag) | |
2365 | { | |
2366 | if (tag == Tag_compatibility) | |
2367 | return ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_STR_VAL; | |
2368 | ||
2369 | if (tag < 32) | |
2370 | return ATTR_TYPE_FLAG_INT_VAL; | |
2371 | ||
2372 | return (tag & 1) != 0 ? ATTR_TYPE_FLAG_STR_VAL : ATTR_TYPE_FLAG_INT_VAL; | |
2373 | } | |
2374 | ||
2375 | static inline const char * | |
2376 | isa_type (int isa) | |
2377 | { | |
2378 | switch (isa) | |
2379 | { | |
2380 | case 1: return "MSP430"; | |
2381 | case 2: return "MSP430X"; | |
2382 | default: return "unknown"; | |
2383 | } | |
2384 | } | |
2385 | ||
2386 | static inline const char * | |
2387 | code_model (int model) | |
2388 | { | |
2389 | switch (model) | |
2390 | { | |
2391 | case 1: return "small"; | |
2392 | case 2: return "large"; | |
2393 | default: return "unknown"; | |
2394 | } | |
2395 | } | |
2396 | ||
2397 | static inline const char * | |
2398 | data_model (int model) | |
2399 | { | |
2400 | switch (model) | |
2401 | { | |
2402 | case 1: return "small"; | |
2403 | case 2: return "large"; | |
2404 | case 3: return "restricted large"; | |
2405 | default: return "unknown"; | |
2406 | } | |
2407 | } | |
2408 | ||
2409 | /* Merge MSPABI object attributes from IBFD into OBFD. | |
2410 | Raise an error if there are conflicting attributes. */ | |
2411 | ||
2412 | static bfd_boolean | |
2413 | elf32_msp430_merge_mspabi_attributes (bfd *ibfd, bfd *obfd) | |
2414 | { | |
2415 | obj_attribute *in_attr; | |
2416 | obj_attribute *out_attr; | |
2417 | bfd_boolean result = TRUE; | |
2418 | static bfd * first_input_bfd = NULL; | |
2419 | ||
2420 | /* Skip linker created files. */ | |
2421 | if (ibfd->flags & BFD_LINKER_CREATED) | |
2422 | return TRUE; | |
2423 | ||
2424 | /* If this is the first real object just copy the attributes. */ | |
2425 | if (!elf_known_obj_attributes_proc (obfd)[0].i) | |
2426 | { | |
2427 | _bfd_elf_copy_obj_attributes (ibfd, obfd); | |
2428 | ||
2429 | out_attr = elf_known_obj_attributes_proc (obfd); | |
2430 | ||
2431 | /* Use the Tag_null value to indicate that | |
2432 | the attributes have been initialized. */ | |
2433 | out_attr[0].i = 1; | |
2434 | ||
2435 | first_input_bfd = ibfd; | |
2436 | return TRUE; | |
2437 | } | |
2438 | ||
2439 | in_attr = elf_known_obj_attributes_proc (ibfd); | |
2440 | out_attr = elf_known_obj_attributes_proc (obfd); | |
2441 | ||
2442 | /* The ISAs must be the same. */ | |
2443 | if (in_attr[OFBA_MSPABI_Tag_ISA].i != out_attr[OFBA_MSPABI_Tag_ISA].i) | |
2444 | { | |
2445 | _bfd_error_handler | |
2446 | (_("error: %B uses %s instructions but %B uses %s"), | |
2447 | ibfd, first_input_bfd, | |
2448 | isa_type (in_attr[OFBA_MSPABI_Tag_ISA].i), | |
2449 | isa_type (out_attr[OFBA_MSPABI_Tag_ISA].i)); | |
2450 | result = FALSE; | |
2451 | } | |
2452 | ||
2453 | /* The code models must be the same. */ | |
2454 | if (in_attr[OFBA_MSPABI_Tag_Code_Model].i != | |
2455 | out_attr[OFBA_MSPABI_Tag_Code_Model].i) | |
2456 | { | |
2457 | _bfd_error_handler | |
2458 | (_("error: %B uses the %s code model whereas %B uses the %s code model"), | |
2459 | ibfd, first_input_bfd, | |
2460 | code_model (in_attr[OFBA_MSPABI_Tag_Code_Model].i), | |
2461 | code_model (out_attr[OFBA_MSPABI_Tag_Code_Model].i)); | |
2462 | result = FALSE; | |
2463 | } | |
2464 | ||
2465 | /* The large code model is only supported by the MSP430X. */ | |
2466 | if (in_attr[OFBA_MSPABI_Tag_Code_Model].i == 2 | |
2467 | && out_attr[OFBA_MSPABI_Tag_ISA].i != 2) | |
2468 | { | |
2469 | _bfd_error_handler | |
2470 | (_("error: %B uses the large code model but %B uses MSP430 instructions"), | |
2471 | ibfd, first_input_bfd); | |
2472 | result = FALSE; | |
2473 | } | |
2474 | ||
2475 | /* The data models must be the same. */ | |
2476 | if (in_attr[OFBA_MSPABI_Tag_Data_Model].i != | |
2477 | out_attr[OFBA_MSPABI_Tag_Data_Model].i) | |
2478 | { | |
2479 | _bfd_error_handler | |
2480 | (_("error: %B uses the %s data model whereas %B uses the %s data model"), | |
2481 | ibfd, first_input_bfd, | |
2482 | data_model (in_attr[OFBA_MSPABI_Tag_Data_Model].i), | |
2483 | data_model (out_attr[OFBA_MSPABI_Tag_Data_Model].i)); | |
2484 | result = FALSE; | |
2485 | } | |
2486 | ||
2487 | /* The small code model requires the use of the small data model. */ | |
2488 | if (in_attr[OFBA_MSPABI_Tag_Code_Model].i == 1 | |
2489 | && out_attr[OFBA_MSPABI_Tag_Data_Model].i != 1) | |
2490 | { | |
2491 | _bfd_error_handler | |
2492 | (_("error: %B uses the small code model but %B uses the %s data model"), | |
2493 | ibfd, first_input_bfd, | |
2494 | data_model (out_attr[OFBA_MSPABI_Tag_Data_Model].i)); | |
2495 | result = FALSE; | |
2496 | } | |
2497 | ||
2498 | /* The large data models are only supported by the MSP430X. */ | |
2499 | if (in_attr[OFBA_MSPABI_Tag_Data_Model].i > 1 | |
2500 | && out_attr[OFBA_MSPABI_Tag_ISA].i != 2) | |
2501 | { | |
2502 | _bfd_error_handler | |
2503 | (_("error: %B uses the %s data model but %B only uses MSP430 instructions"), | |
2504 | ibfd, first_input_bfd, | |
2505 | data_model (in_attr[OFBA_MSPABI_Tag_Data_Model].i)); | |
2506 | result = FALSE; | |
2507 | } | |
1b786873 | 2508 | |
13761a11 NC |
2509 | return result; |
2510 | } | |
2511 | ||
2512 | /* Merge backend specific data from an object file to the output | |
2513 | object file when linking. */ | |
2514 | ||
2515 | static bfd_boolean | |
2516 | elf32_msp430_merge_private_bfd_data (bfd * ibfd, bfd * obfd) | |
2517 | { | |
2518 | /* Make sure that the machine number reflects the most | |
2519 | advanced version of the MSP architecture required. */ | |
2520 | #define max(a,b) ((a) > (b) ? (a) : (b)) | |
2521 | if (bfd_get_mach (ibfd) != bfd_get_mach (obfd)) | |
2522 | bfd_default_set_arch_mach (obfd, bfd_get_arch (obfd), | |
2523 | max (bfd_get_mach (ibfd), bfd_get_mach (obfd))); | |
2524 | #undef max | |
2525 | ||
2526 | return elf32_msp430_merge_mspabi_attributes (ibfd, obfd); | |
2527 | } | |
2528 | ||
13761a11 NC |
2529 | static bfd_boolean |
2530 | msp430_elf_is_target_special_symbol (bfd *abfd, asymbol *sym) | |
2531 | { | |
2532 | return _bfd_elf_is_local_label_name (abfd, sym->name); | |
2533 | } | |
2534 | ||
79559014 NC |
2535 | static bfd_boolean |
2536 | uses_large_model (bfd *abfd) | |
2537 | { | |
2538 | obj_attribute * attr; | |
2539 | ||
2540 | if (abfd->flags & BFD_LINKER_CREATED) | |
2541 | return FALSE; | |
2542 | ||
2543 | attr = elf_known_obj_attributes_proc (abfd); | |
2544 | if (attr == NULL) | |
2545 | return FALSE; | |
2546 | ||
2547 | return attr[OFBA_MSPABI_Tag_Code_Model].i == 2; | |
2548 | } | |
2549 | ||
2550 | static unsigned int | |
2551 | elf32_msp430_eh_frame_address_size (bfd *abfd, asection *sec ATTRIBUTE_UNUSED) | |
2552 | { | |
2553 | return uses_large_model (abfd) ? 4 : 2; | |
2554 | } | |
2555 | ||
13761a11 NC |
2556 | /* This is gross. The MSP430 EABI says that (sec 11.5): |
2557 | ||
2558 | "An implementation may choose to use Rel or Rela | |
2559 | type relocations for other relocations." | |
2560 | ||
2561 | But it also says that: | |
1b786873 | 2562 | |
13761a11 NC |
2563 | "Certain relocations are identified as Rela only. [snip] |
2564 | Where Rela is specified, an implementation must honor | |
2565 | this requirement." | |
2566 | ||
2567 | There is one relocation marked as requiring RELA - R_MSP430_ABS_HI16 - but | |
2568 | to keep things simple we choose to use RELA relocations throughout. The | |
2569 | problem is that the TI compiler generates REL relocations, so we have to | |
2570 | be able to accept those as well. */ | |
2571 | ||
2572 | #define elf_backend_may_use_rel_p 1 | |
2573 | #define elf_backend_may_use_rela_p 1 | |
2574 | #define elf_backend_default_use_rela_p 1 | |
2575 | ||
2576 | #undef elf_backend_obj_attrs_vendor | |
2577 | #define elf_backend_obj_attrs_vendor "mspabi" | |
2578 | #undef elf_backend_obj_attrs_section | |
2579 | #define elf_backend_obj_attrs_section ".MSP430.attributes" | |
2580 | #undef elf_backend_obj_attrs_section_type | |
2581 | #define elf_backend_obj_attrs_section_type SHT_MSP430_ATTRIBUTES | |
2582 | #define elf_backend_section_from_shdr elf32_msp430_section_from_shdr | |
2583 | #define elf_backend_obj_attrs_handle_unknown elf32_msp430_obj_attrs_handle_unknown | |
2584 | #undef elf_backend_obj_attrs_arg_type | |
2585 | #define elf_backend_obj_attrs_arg_type elf32_msp430_obj_attrs_arg_type | |
13761a11 | 2586 | #define bfd_elf32_bfd_merge_private_bfd_data elf32_msp430_merge_private_bfd_data |
79559014 | 2587 | #define elf_backend_eh_frame_address_size elf32_msp430_eh_frame_address_size |
2469cfa2 NC |
2588 | |
2589 | #define ELF_ARCH bfd_arch_msp430 | |
2590 | #define ELF_MACHINE_CODE EM_MSP430 | |
2591 | #define ELF_MACHINE_ALT1 EM_MSP430_OLD | |
13761a11 | 2592 | #define ELF_MAXPAGESIZE 4 |
d1036acb | 2593 | #define ELF_OSABI ELFOSABI_STANDALONE |
2469cfa2 | 2594 | |
6d00b590 | 2595 | #define TARGET_LITTLE_SYM msp430_elf32_vec |
2469cfa2 NC |
2596 | #define TARGET_LITTLE_NAME "elf32-msp430" |
2597 | ||
2598 | #define elf_info_to_howto msp430_info_to_howto_rela | |
2599 | #define elf_info_to_howto_rel NULL | |
2600 | #define elf_backend_relocate_section elf32_msp430_relocate_section | |
2469cfa2 NC |
2601 | #define elf_backend_check_relocs elf32_msp430_check_relocs |
2602 | #define elf_backend_can_gc_sections 1 | |
2603 | #define elf_backend_final_write_processing bfd_elf_msp430_final_write_processing | |
2604 | #define elf_backend_object_p elf32_msp430_object_p | |
b18c562e | 2605 | #define bfd_elf32_bfd_relax_section msp430_elf_relax_section |
13761a11 NC |
2606 | #define bfd_elf32_bfd_is_target_special_symbol msp430_elf_is_target_special_symbol |
2607 | ||
2608 | #undef elf32_bed | |
2609 | #define elf32_bed elf32_msp430_bed | |
2610 | ||
2611 | #include "elf32-target.h" | |
2612 | ||
2613 | /* The TI compiler sets the OSABI field to ELFOSABI_NONE. */ | |
2614 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 2615 | #define TARGET_LITTLE_SYM msp430_elf32_ti_vec |
13761a11 NC |
2616 | |
2617 | #undef elf32_bed | |
2618 | #define elf32_bed elf32_msp430_ti_bed | |
2619 | ||
1b786873 | 2620 | #undef ELF_OSABI |
13761a11 NC |
2621 | #define ELF_OSABI ELFOSABI_NONE |
2622 | ||
2623 | static const struct bfd_elf_special_section msp430_ti_elf_special_sections[] = | |
2624 | { | |
2625 | /* prefix, prefix_length, suffix_len, type, attributes. */ | |
2626 | { STRING_COMMA_LEN (".TI.symbol.alias"), 0, SHT_MSP430_SYM_ALIASES, 0 }, | |
2627 | { STRING_COMMA_LEN (".TI.section.flags"), 0, SHT_MSP430_SEC_FLAGS, 0 }, | |
2628 | { STRING_COMMA_LEN ("_TI_build_attrib"), 0, SHT_MSP430_ATTRIBUTES, 0 }, | |
2629 | { NULL, 0, 0, 0, 0 } | |
2630 | }; | |
2469cfa2 | 2631 | |
b6518b38 NC |
2632 | #undef elf_backend_special_sections |
2633 | #define elf_backend_special_sections msp430_ti_elf_special_sections | |
2634 | ||
2469cfa2 | 2635 | #include "elf32-target.h" |