Commit | Line | Data |
---|---|---|
adde6300 | 1 | /* AVR-specific support for 32-bit ELF |
df406460 | 2 | Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2006 |
b2a8e766 | 3 | Free Software Foundation, Inc. |
adde6300 AM |
4 | Contributed by Denis Chertykov <denisc@overta.ru> |
5 | ||
750bce0e | 6 | This file is part of BFD, the Binary File Descriptor library. |
adde6300 | 7 | |
750bce0e NC |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
adde6300 | 12 | |
750bce0e NC |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
adde6300 | 17 | |
750bce0e NC |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software | |
4cdc7696 | 20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, |
df406460 | 21 | Boston, MA 02110-1301, USA. */ |
adde6300 | 22 | |
adde6300 AM |
23 | #include "bfd.h" |
24 | #include "sysdep.h" | |
25 | #include "libbfd.h" | |
26 | #include "elf-bfd.h" | |
27 | #include "elf/avr.h" | |
28 | ||
adde6300 AM |
29 | static reloc_howto_type elf_avr_howto_table[] = |
30 | { | |
31 | HOWTO (R_AVR_NONE, /* type */ | |
32 | 0, /* rightshift */ | |
33 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
34 | 32, /* bitsize */ | |
b34976b6 | 35 | FALSE, /* pc_relative */ |
adde6300 AM |
36 | 0, /* bitpos */ |
37 | complain_overflow_bitfield, /* complain_on_overflow */ | |
38 | bfd_elf_generic_reloc, /* special_function */ | |
39 | "R_AVR_NONE", /* name */ | |
b34976b6 | 40 | FALSE, /* partial_inplace */ |
adde6300 AM |
41 | 0, /* src_mask */ |
42 | 0, /* dst_mask */ | |
b34976b6 | 43 | FALSE), /* pcrel_offset */ |
adde6300 AM |
44 | |
45 | HOWTO (R_AVR_32, /* type */ | |
46 | 0, /* rightshift */ | |
47 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
48 | 32, /* bitsize */ | |
b34976b6 | 49 | FALSE, /* pc_relative */ |
adde6300 AM |
50 | 0, /* bitpos */ |
51 | complain_overflow_bitfield, /* complain_on_overflow */ | |
52 | bfd_elf_generic_reloc, /* special_function */ | |
53 | "R_AVR_32", /* name */ | |
b34976b6 | 54 | FALSE, /* partial_inplace */ |
adde6300 AM |
55 | 0xffffffff, /* src_mask */ |
56 | 0xffffffff, /* dst_mask */ | |
b34976b6 | 57 | FALSE), /* pcrel_offset */ |
adde6300 AM |
58 | |
59 | /* A 7 bit PC relative relocation. */ | |
60 | HOWTO (R_AVR_7_PCREL, /* type */ | |
61 | 1, /* rightshift */ | |
62 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
63 | 7, /* bitsize */ | |
b34976b6 | 64 | TRUE, /* pc_relative */ |
adde6300 AM |
65 | 3, /* bitpos */ |
66 | complain_overflow_bitfield, /* complain_on_overflow */ | |
67 | bfd_elf_generic_reloc, /* special_function */ | |
68 | "R_AVR_7_PCREL", /* name */ | |
b34976b6 | 69 | FALSE, /* partial_inplace */ |
adde6300 AM |
70 | 0xffff, /* src_mask */ |
71 | 0xffff, /* dst_mask */ | |
b34976b6 | 72 | TRUE), /* pcrel_offset */ |
adde6300 AM |
73 | |
74 | /* A 13 bit PC relative relocation. */ | |
75 | HOWTO (R_AVR_13_PCREL, /* type */ | |
76 | 1, /* rightshift */ | |
77 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
78 | 13, /* bitsize */ | |
b34976b6 | 79 | TRUE, /* pc_relative */ |
adde6300 AM |
80 | 0, /* bitpos */ |
81 | complain_overflow_bitfield, /* complain_on_overflow */ | |
82 | bfd_elf_generic_reloc, /* special_function */ | |
83 | "R_AVR_13_PCREL", /* name */ | |
b34976b6 | 84 | FALSE, /* partial_inplace */ |
adde6300 AM |
85 | 0xfff, /* src_mask */ |
86 | 0xfff, /* dst_mask */ | |
b34976b6 | 87 | TRUE), /* pcrel_offset */ |
adde6300 AM |
88 | |
89 | /* A 16 bit absolute relocation. */ | |
90 | HOWTO (R_AVR_16, /* type */ | |
91 | 0, /* rightshift */ | |
92 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
93 | 16, /* bitsize */ | |
b34976b6 | 94 | FALSE, /* pc_relative */ |
adde6300 AM |
95 | 0, /* bitpos */ |
96 | complain_overflow_dont, /* complain_on_overflow */ | |
97 | bfd_elf_generic_reloc, /* special_function */ | |
98 | "R_AVR_16", /* name */ | |
b34976b6 | 99 | FALSE, /* partial_inplace */ |
adde6300 AM |
100 | 0xffff, /* src_mask */ |
101 | 0xffff, /* dst_mask */ | |
b34976b6 | 102 | FALSE), /* pcrel_offset */ |
adde6300 AM |
103 | |
104 | /* A 16 bit absolute relocation for command address. */ | |
105 | HOWTO (R_AVR_16_PM, /* type */ | |
106 | 1, /* rightshift */ | |
107 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
108 | 16, /* bitsize */ | |
b34976b6 | 109 | FALSE, /* pc_relative */ |
adde6300 AM |
110 | 0, /* bitpos */ |
111 | complain_overflow_bitfield, /* complain_on_overflow */ | |
112 | bfd_elf_generic_reloc, /* special_function */ | |
113 | "R_AVR_16_PM", /* name */ | |
b34976b6 | 114 | FALSE, /* partial_inplace */ |
adde6300 AM |
115 | 0xffff, /* src_mask */ |
116 | 0xffff, /* dst_mask */ | |
b34976b6 | 117 | FALSE), /* pcrel_offset */ |
adde6300 AM |
118 | /* A low 8 bit absolute relocation of 16 bit address. |
119 | For LDI command. */ | |
120 | HOWTO (R_AVR_LO8_LDI, /* type */ | |
121 | 0, /* rightshift */ | |
122 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
123 | 8, /* bitsize */ | |
b34976b6 | 124 | FALSE, /* pc_relative */ |
adde6300 AM |
125 | 0, /* bitpos */ |
126 | complain_overflow_dont, /* complain_on_overflow */ | |
127 | bfd_elf_generic_reloc, /* special_function */ | |
128 | "R_AVR_LO8_LDI", /* name */ | |
b34976b6 | 129 | FALSE, /* partial_inplace */ |
adde6300 AM |
130 | 0xffff, /* src_mask */ |
131 | 0xffff, /* dst_mask */ | |
b34976b6 | 132 | FALSE), /* pcrel_offset */ |
adde6300 AM |
133 | /* A high 8 bit absolute relocation of 16 bit address. |
134 | For LDI command. */ | |
135 | HOWTO (R_AVR_HI8_LDI, /* type */ | |
136 | 8, /* rightshift */ | |
137 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
138 | 8, /* bitsize */ | |
b34976b6 | 139 | FALSE, /* pc_relative */ |
adde6300 AM |
140 | 0, /* bitpos */ |
141 | complain_overflow_dont, /* complain_on_overflow */ | |
142 | bfd_elf_generic_reloc, /* special_function */ | |
143 | "R_AVR_HI8_LDI", /* name */ | |
b34976b6 | 144 | FALSE, /* partial_inplace */ |
adde6300 AM |
145 | 0xffff, /* src_mask */ |
146 | 0xffff, /* dst_mask */ | |
b34976b6 | 147 | FALSE), /* pcrel_offset */ |
adde6300 | 148 | /* A high 6 bit absolute relocation of 22 bit address. |
4cdc7696 | 149 | For LDI command. As well second most significant 8 bit value of |
df406460 | 150 | a 32 bit link-time constant. */ |
adde6300 AM |
151 | HOWTO (R_AVR_HH8_LDI, /* type */ |
152 | 16, /* rightshift */ | |
153 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
154 | 8, /* bitsize */ | |
b34976b6 | 155 | FALSE, /* pc_relative */ |
adde6300 AM |
156 | 0, /* bitpos */ |
157 | complain_overflow_dont, /* complain_on_overflow */ | |
158 | bfd_elf_generic_reloc, /* special_function */ | |
159 | "R_AVR_HH8_LDI", /* name */ | |
b34976b6 | 160 | FALSE, /* partial_inplace */ |
adde6300 AM |
161 | 0xffff, /* src_mask */ |
162 | 0xffff, /* dst_mask */ | |
b34976b6 | 163 | FALSE), /* pcrel_offset */ |
adde6300 AM |
164 | /* A negative low 8 bit absolute relocation of 16 bit address. |
165 | For LDI command. */ | |
166 | HOWTO (R_AVR_LO8_LDI_NEG, /* type */ | |
167 | 0, /* rightshift */ | |
168 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
169 | 8, /* bitsize */ | |
b34976b6 | 170 | FALSE, /* pc_relative */ |
adde6300 AM |
171 | 0, /* bitpos */ |
172 | complain_overflow_dont, /* complain_on_overflow */ | |
173 | bfd_elf_generic_reloc, /* special_function */ | |
174 | "R_AVR_LO8_LDI_NEG", /* name */ | |
b34976b6 | 175 | FALSE, /* partial_inplace */ |
adde6300 AM |
176 | 0xffff, /* src_mask */ |
177 | 0xffff, /* dst_mask */ | |
b34976b6 | 178 | FALSE), /* pcrel_offset */ |
df406460 | 179 | /* A negative high 8 bit absolute relocation of 16 bit address. |
adde6300 AM |
180 | For LDI command. */ |
181 | HOWTO (R_AVR_HI8_LDI_NEG, /* type */ | |
182 | 8, /* rightshift */ | |
183 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
184 | 8, /* bitsize */ | |
b34976b6 | 185 | FALSE, /* pc_relative */ |
adde6300 AM |
186 | 0, /* bitpos */ |
187 | complain_overflow_dont, /* complain_on_overflow */ | |
188 | bfd_elf_generic_reloc, /* special_function */ | |
189 | "R_AVR_HI8_LDI_NEG", /* name */ | |
b34976b6 | 190 | FALSE, /* partial_inplace */ |
adde6300 AM |
191 | 0xffff, /* src_mask */ |
192 | 0xffff, /* dst_mask */ | |
b34976b6 | 193 | FALSE), /* pcrel_offset */ |
df406460 | 194 | /* A negative high 6 bit absolute relocation of 22 bit address. |
adde6300 AM |
195 | For LDI command. */ |
196 | HOWTO (R_AVR_HH8_LDI_NEG, /* type */ | |
197 | 16, /* rightshift */ | |
198 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
199 | 8, /* bitsize */ | |
b34976b6 | 200 | FALSE, /* pc_relative */ |
adde6300 AM |
201 | 0, /* bitpos */ |
202 | complain_overflow_dont, /* complain_on_overflow */ | |
203 | bfd_elf_generic_reloc, /* special_function */ | |
204 | "R_AVR_HH8_LDI_NEG", /* name */ | |
b34976b6 | 205 | FALSE, /* partial_inplace */ |
adde6300 AM |
206 | 0xffff, /* src_mask */ |
207 | 0xffff, /* dst_mask */ | |
b34976b6 | 208 | FALSE), /* pcrel_offset */ |
adde6300 AM |
209 | /* A low 8 bit absolute relocation of 24 bit program memory address. |
210 | For LDI command. */ | |
211 | HOWTO (R_AVR_LO8_LDI_PM, /* type */ | |
212 | 1, /* rightshift */ | |
213 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
214 | 8, /* bitsize */ | |
b34976b6 | 215 | FALSE, /* pc_relative */ |
adde6300 AM |
216 | 0, /* bitpos */ |
217 | complain_overflow_dont, /* complain_on_overflow */ | |
218 | bfd_elf_generic_reloc, /* special_function */ | |
219 | "R_AVR_LO8_LDI_PM", /* name */ | |
b34976b6 | 220 | FALSE, /* partial_inplace */ |
adde6300 AM |
221 | 0xffff, /* src_mask */ |
222 | 0xffff, /* dst_mask */ | |
b34976b6 | 223 | FALSE), /* pcrel_offset */ |
adde6300 AM |
224 | /* A high 8 bit absolute relocation of 16 bit program memory address. |
225 | For LDI command. */ | |
226 | HOWTO (R_AVR_HI8_LDI_PM, /* type */ | |
227 | 9, /* rightshift */ | |
228 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
229 | 8, /* bitsize */ | |
b34976b6 | 230 | FALSE, /* pc_relative */ |
adde6300 AM |
231 | 0, /* bitpos */ |
232 | complain_overflow_dont, /* complain_on_overflow */ | |
233 | bfd_elf_generic_reloc, /* special_function */ | |
234 | "R_AVR_HI8_LDI_PM", /* name */ | |
b34976b6 | 235 | FALSE, /* partial_inplace */ |
adde6300 AM |
236 | 0xffff, /* src_mask */ |
237 | 0xffff, /* dst_mask */ | |
b34976b6 | 238 | FALSE), /* pcrel_offset */ |
adde6300 AM |
239 | /* A high 8 bit absolute relocation of 24 bit program memory address. |
240 | For LDI command. */ | |
241 | HOWTO (R_AVR_HH8_LDI_PM, /* type */ | |
242 | 17, /* rightshift */ | |
243 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
244 | 8, /* bitsize */ | |
b34976b6 | 245 | FALSE, /* pc_relative */ |
adde6300 AM |
246 | 0, /* bitpos */ |
247 | complain_overflow_dont, /* complain_on_overflow */ | |
248 | bfd_elf_generic_reloc, /* special_function */ | |
249 | "R_AVR_HH8_LDI_PM", /* name */ | |
b34976b6 | 250 | FALSE, /* partial_inplace */ |
adde6300 AM |
251 | 0xffff, /* src_mask */ |
252 | 0xffff, /* dst_mask */ | |
b34976b6 | 253 | FALSE), /* pcrel_offset */ |
adde6300 AM |
254 | /* A low 8 bit absolute relocation of a negative 24 bit |
255 | program memory address. For LDI command. */ | |
256 | HOWTO (R_AVR_LO8_LDI_PM_NEG, /* type */ | |
257 | 1, /* rightshift */ | |
258 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
259 | 8, /* bitsize */ | |
b34976b6 | 260 | FALSE, /* pc_relative */ |
adde6300 AM |
261 | 0, /* bitpos */ |
262 | complain_overflow_dont, /* complain_on_overflow */ | |
263 | bfd_elf_generic_reloc, /* special_function */ | |
264 | "R_AVR_LO8_LDI_PM_NEG", /* name */ | |
b34976b6 | 265 | FALSE, /* partial_inplace */ |
adde6300 AM |
266 | 0xffff, /* src_mask */ |
267 | 0xffff, /* dst_mask */ | |
b34976b6 | 268 | FALSE), /* pcrel_offset */ |
adde6300 AM |
269 | /* A high 8 bit absolute relocation of a negative 16 bit |
270 | program memory address. For LDI command. */ | |
271 | HOWTO (R_AVR_HI8_LDI_PM_NEG, /* type */ | |
272 | 9, /* rightshift */ | |
273 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
274 | 8, /* bitsize */ | |
b34976b6 | 275 | FALSE, /* pc_relative */ |
adde6300 AM |
276 | 0, /* bitpos */ |
277 | complain_overflow_dont, /* complain_on_overflow */ | |
278 | bfd_elf_generic_reloc, /* special_function */ | |
279 | "R_AVR_HI8_LDI_PM_NEG", /* name */ | |
b34976b6 | 280 | FALSE, /* partial_inplace */ |
adde6300 AM |
281 | 0xffff, /* src_mask */ |
282 | 0xffff, /* dst_mask */ | |
b34976b6 | 283 | FALSE), /* pcrel_offset */ |
adde6300 AM |
284 | /* A high 8 bit absolute relocation of a negative 24 bit |
285 | program memory address. For LDI command. */ | |
286 | HOWTO (R_AVR_HH8_LDI_PM_NEG, /* type */ | |
287 | 17, /* rightshift */ | |
288 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
289 | 8, /* bitsize */ | |
b34976b6 | 290 | FALSE, /* pc_relative */ |
adde6300 AM |
291 | 0, /* bitpos */ |
292 | complain_overflow_dont, /* complain_on_overflow */ | |
293 | bfd_elf_generic_reloc, /* special_function */ | |
294 | "R_AVR_HH8_LDI_PM_NEG", /* name */ | |
b34976b6 | 295 | FALSE, /* partial_inplace */ |
adde6300 AM |
296 | 0xffff, /* src_mask */ |
297 | 0xffff, /* dst_mask */ | |
b34976b6 | 298 | FALSE), /* pcrel_offset */ |
adde6300 AM |
299 | /* Relocation for CALL command in ATmega. */ |
300 | HOWTO (R_AVR_CALL, /* type */ | |
301 | 1, /* rightshift */ | |
302 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
303 | 23, /* bitsize */ | |
b34976b6 | 304 | FALSE, /* pc_relative */ |
adde6300 | 305 | 0, /* bitpos */ |
750bce0e | 306 | complain_overflow_dont,/* complain_on_overflow */ |
adde6300 AM |
307 | bfd_elf_generic_reloc, /* special_function */ |
308 | "R_AVR_CALL", /* name */ | |
b34976b6 | 309 | FALSE, /* partial_inplace */ |
adde6300 AM |
310 | 0xffffffff, /* src_mask */ |
311 | 0xffffffff, /* dst_mask */ | |
750bce0e NC |
312 | FALSE), /* pcrel_offset */ |
313 | /* A 16 bit absolute relocation of 16 bit address. | |
314 | For LDI command. */ | |
315 | HOWTO (R_AVR_LDI, /* type */ | |
316 | 0, /* rightshift */ | |
317 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
318 | 16, /* bitsize */ | |
319 | FALSE, /* pc_relative */ | |
320 | 0, /* bitpos */ | |
321 | complain_overflow_dont,/* complain_on_overflow */ | |
322 | bfd_elf_generic_reloc, /* special_function */ | |
323 | "R_AVR_LDI", /* name */ | |
324 | FALSE, /* partial_inplace */ | |
325 | 0xffff, /* src_mask */ | |
326 | 0xffff, /* dst_mask */ | |
327 | FALSE), /* pcrel_offset */ | |
328 | /* A 6 bit absolute relocation of 6 bit offset. | |
329 | For ldd/sdd command. */ | |
330 | HOWTO (R_AVR_6, /* type */ | |
331 | 0, /* rightshift */ | |
332 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
333 | 6, /* bitsize */ | |
334 | FALSE, /* pc_relative */ | |
335 | 0, /* bitpos */ | |
336 | complain_overflow_dont,/* complain_on_overflow */ | |
337 | bfd_elf_generic_reloc, /* special_function */ | |
338 | "R_AVR_6", /* name */ | |
339 | FALSE, /* partial_inplace */ | |
340 | 0xffff, /* src_mask */ | |
341 | 0xffff, /* dst_mask */ | |
342 | FALSE), /* pcrel_offset */ | |
343 | /* A 6 bit absolute relocation of 6 bit offset. | |
344 | For sbiw/adiw command. */ | |
345 | HOWTO (R_AVR_6_ADIW, /* type */ | |
346 | 0, /* rightshift */ | |
347 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
348 | 6, /* bitsize */ | |
349 | FALSE, /* pc_relative */ | |
350 | 0, /* bitpos */ | |
351 | complain_overflow_dont,/* complain_on_overflow */ | |
352 | bfd_elf_generic_reloc, /* special_function */ | |
353 | "R_AVR_6_ADIW", /* name */ | |
354 | FALSE, /* partial_inplace */ | |
355 | 0xffff, /* src_mask */ | |
356 | 0xffff, /* dst_mask */ | |
df406460 NC |
357 | FALSE), /* pcrel_offset */ |
358 | /* Most significant 8 bit value of a 32 bit link-time constant. */ | |
359 | HOWTO (R_AVR_MS8_LDI, /* type */ | |
360 | 24, /* rightshift */ | |
361 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
362 | 8, /* bitsize */ | |
363 | FALSE, /* pc_relative */ | |
364 | 0, /* bitpos */ | |
365 | complain_overflow_dont, /* complain_on_overflow */ | |
366 | bfd_elf_generic_reloc, /* special_function */ | |
367 | "R_AVR_MS8_LDI", /* name */ | |
368 | FALSE, /* partial_inplace */ | |
369 | 0xffff, /* src_mask */ | |
370 | 0xffff, /* dst_mask */ | |
371 | FALSE), /* pcrel_offset */ | |
372 | /* Negative most significant 8 bit value of a 32 bit link-time constant. */ | |
373 | HOWTO (R_AVR_MS8_LDI_NEG, /* type */ | |
374 | 24, /* rightshift */ | |
375 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
376 | 8, /* bitsize */ | |
377 | FALSE, /* pc_relative */ | |
378 | 0, /* bitpos */ | |
379 | complain_overflow_dont, /* complain_on_overflow */ | |
380 | bfd_elf_generic_reloc, /* special_function */ | |
381 | "R_AVR_MS8_LDI_NEG", /* name */ | |
382 | FALSE, /* partial_inplace */ | |
383 | 0xffff, /* src_mask */ | |
384 | 0xffff, /* dst_mask */ | |
385 | FALSE) /* pcrel_offset */ | |
adde6300 AM |
386 | }; |
387 | ||
388 | /* Map BFD reloc types to AVR ELF reloc types. */ | |
389 | ||
390 | struct avr_reloc_map | |
391 | { | |
392 | bfd_reloc_code_real_type bfd_reloc_val; | |
393 | unsigned int elf_reloc_val; | |
394 | }; | |
395 | ||
396 | static const struct avr_reloc_map avr_reloc_map[] = | |
397 | { | |
398 | { BFD_RELOC_NONE, R_AVR_NONE }, | |
399 | { BFD_RELOC_32, R_AVR_32 }, | |
400 | { BFD_RELOC_AVR_7_PCREL, R_AVR_7_PCREL }, | |
401 | { BFD_RELOC_AVR_13_PCREL, R_AVR_13_PCREL }, | |
402 | { BFD_RELOC_16, R_AVR_16 }, | |
403 | { BFD_RELOC_AVR_16_PM, R_AVR_16_PM }, | |
404 | { BFD_RELOC_AVR_LO8_LDI, R_AVR_LO8_LDI}, | |
405 | { BFD_RELOC_AVR_HI8_LDI, R_AVR_HI8_LDI }, | |
406 | { BFD_RELOC_AVR_HH8_LDI, R_AVR_HH8_LDI }, | |
df406460 | 407 | { BFD_RELOC_AVR_MS8_LDI, R_AVR_MS8_LDI }, |
adde6300 AM |
408 | { BFD_RELOC_AVR_LO8_LDI_NEG, R_AVR_LO8_LDI_NEG }, |
409 | { BFD_RELOC_AVR_HI8_LDI_NEG, R_AVR_HI8_LDI_NEG }, | |
410 | { BFD_RELOC_AVR_HH8_LDI_NEG, R_AVR_HH8_LDI_NEG }, | |
df406460 | 411 | { BFD_RELOC_AVR_MS8_LDI_NEG, R_AVR_MS8_LDI_NEG }, |
adde6300 AM |
412 | { BFD_RELOC_AVR_LO8_LDI_PM, R_AVR_LO8_LDI_PM }, |
413 | { BFD_RELOC_AVR_HI8_LDI_PM, R_AVR_HI8_LDI_PM }, | |
414 | { BFD_RELOC_AVR_HH8_LDI_PM, R_AVR_HH8_LDI_PM }, | |
415 | { BFD_RELOC_AVR_LO8_LDI_PM_NEG, R_AVR_LO8_LDI_PM_NEG }, | |
416 | { BFD_RELOC_AVR_HI8_LDI_PM_NEG, R_AVR_HI8_LDI_PM_NEG }, | |
417 | { BFD_RELOC_AVR_HH8_LDI_PM_NEG, R_AVR_HH8_LDI_PM_NEG }, | |
750bce0e NC |
418 | { BFD_RELOC_AVR_CALL, R_AVR_CALL }, |
419 | { BFD_RELOC_AVR_LDI, R_AVR_LDI }, | |
420 | { BFD_RELOC_AVR_6, R_AVR_6 }, | |
421 | { BFD_RELOC_AVR_6_ADIW, R_AVR_6_ADIW } | |
adde6300 AM |
422 | }; |
423 | ||
df406460 | 424 | /* Meant to be filled one day with the wrap around address for the |
4cdc7696 | 425 | specific device. I.e. should get the value 0x4000 for 16k devices, |
df406460 | 426 | 0x8000 for 32k devices and so on. |
4cdc7696 | 427 | |
df406460 | 428 | We initialize it here with a value of 0x1000000 resulting in |
4cdc7696 NC |
429 | that we will never suggest a wrap-around jump during relaxation. |
430 | The logic of the source code later on assumes that in | |
df406460 | 431 | avr_pc_wrap_around one single bit is set. */ |
4cdc7696 | 432 | |
df406460 NC |
433 | unsigned int avr_pc_wrap_around = 0x10000000; |
434 | ||
435 | /* Calculates the effective distance of a pc relative jump/call. */ | |
73160847 | 436 | |
df406460 NC |
437 | static int |
438 | avr_relative_distance_considering_wrap_around (unsigned int distance) | |
4cdc7696 | 439 | { |
df406460 | 440 | unsigned int wrap_around_mask = avr_pc_wrap_around - 1; |
df406460 NC |
441 | int dist_with_wrap_around = distance & wrap_around_mask; |
442 | ||
4cdc7696 | 443 | if (dist_with_wrap_around > ((int) (avr_pc_wrap_around >> 1))) |
df406460 NC |
444 | dist_with_wrap_around -= avr_pc_wrap_around; |
445 | ||
446 | return dist_with_wrap_around; | |
447 | } | |
448 | ||
449 | ||
adde6300 | 450 | static reloc_howto_type * |
4cdc7696 NC |
451 | bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
452 | bfd_reloc_code_real_type code) | |
adde6300 AM |
453 | { |
454 | unsigned int i; | |
455 | ||
456 | for (i = 0; | |
457 | i < sizeof (avr_reloc_map) / sizeof (struct avr_reloc_map); | |
458 | i++) | |
73160847 NC |
459 | if (avr_reloc_map[i].bfd_reloc_val == code) |
460 | return &elf_avr_howto_table[avr_reloc_map[i].elf_reloc_val]; | |
adde6300 AM |
461 | |
462 | return NULL; | |
463 | } | |
464 | ||
465 | /* Set the howto pointer for an AVR ELF reloc. */ | |
466 | ||
467 | static void | |
4cdc7696 NC |
468 | avr_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED, |
469 | arelent *cache_ptr, | |
470 | Elf_Internal_Rela *dst) | |
adde6300 AM |
471 | { |
472 | unsigned int r_type; | |
473 | ||
474 | r_type = ELF32_R_TYPE (dst->r_info); | |
475 | BFD_ASSERT (r_type < (unsigned int) R_AVR_max); | |
476 | cache_ptr->howto = &elf_avr_howto_table[r_type]; | |
477 | } | |
478 | ||
479 | static asection * | |
4cdc7696 NC |
480 | elf32_avr_gc_mark_hook (asection *sec, |
481 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
482 | Elf_Internal_Rela *rel, | |
483 | struct elf_link_hash_entry *h, | |
484 | Elf_Internal_Sym *sym) | |
adde6300 AM |
485 | { |
486 | if (h != NULL) | |
487 | { | |
488 | switch (ELF32_R_TYPE (rel->r_info)) | |
489 | { | |
490 | default: | |
491 | switch (h->root.type) | |
492 | { | |
493 | case bfd_link_hash_defined: | |
494 | case bfd_link_hash_defweak: | |
495 | return h->root.u.def.section; | |
496 | ||
497 | case bfd_link_hash_common: | |
498 | return h->root.u.c.p->section; | |
499 | ||
500 | default: | |
501 | break; | |
502 | } | |
503 | } | |
504 | } | |
505 | else | |
1e2f5b6e | 506 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
9ad5cbcf | 507 | |
adde6300 AM |
508 | return NULL; |
509 | } | |
510 | ||
b34976b6 | 511 | static bfd_boolean |
4cdc7696 NC |
512 | elf32_avr_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED, |
513 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
514 | asection *sec ATTRIBUTE_UNUSED, | |
515 | const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED) | |
adde6300 AM |
516 | { |
517 | /* We don't use got and plt entries for avr. */ | |
b34976b6 | 518 | return TRUE; |
adde6300 AM |
519 | } |
520 | ||
521 | /* Look through the relocs for a section during the first phase. | |
522 | Since we don't do .gots or .plts, we just need to consider the | |
523 | virtual table relocs for gc. */ | |
524 | ||
b34976b6 | 525 | static bfd_boolean |
4cdc7696 NC |
526 | elf32_avr_check_relocs (bfd *abfd, |
527 | struct bfd_link_info *info, | |
528 | asection *sec, | |
529 | const Elf_Internal_Rela *relocs) | |
adde6300 AM |
530 | { |
531 | Elf_Internal_Shdr *symtab_hdr; | |
532 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
533 | const Elf_Internal_Rela *rel; | |
534 | const Elf_Internal_Rela *rel_end; | |
535 | ||
1049f94e | 536 | if (info->relocatable) |
b34976b6 | 537 | return TRUE; |
adde6300 AM |
538 | |
539 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
540 | sym_hashes = elf_sym_hashes (abfd); | |
4cdc7696 | 541 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym); |
adde6300 AM |
542 | if (!elf_bad_symtab (abfd)) |
543 | sym_hashes_end -= symtab_hdr->sh_info; | |
544 | ||
545 | rel_end = relocs + sec->reloc_count; | |
546 | for (rel = relocs; rel < rel_end; rel++) | |
547 | { | |
548 | struct elf_link_hash_entry *h; | |
549 | unsigned long r_symndx; | |
550 | ||
551 | r_symndx = ELF32_R_SYM (rel->r_info); | |
552 | if (r_symndx < symtab_hdr->sh_info) | |
553 | h = NULL; | |
554 | else | |
973a3492 L |
555 | { |
556 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
557 | while (h->root.type == bfd_link_hash_indirect | |
558 | || h->root.type == bfd_link_hash_warning) | |
559 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
560 | } | |
adde6300 AM |
561 | } |
562 | ||
b34976b6 | 563 | return TRUE; |
adde6300 AM |
564 | } |
565 | ||
566 | /* Perform a single relocation. By default we use the standard BFD | |
567 | routines, but a few relocs, we have to do them ourselves. */ | |
568 | ||
569 | static bfd_reloc_status_type | |
4cdc7696 NC |
570 | avr_final_link_relocate (reloc_howto_type * howto, |
571 | bfd * input_bfd, | |
572 | asection * input_section, | |
573 | bfd_byte * contents, | |
574 | Elf_Internal_Rela * rel, | |
575 | bfd_vma relocation) | |
adde6300 AM |
576 | { |
577 | bfd_reloc_status_type r = bfd_reloc_ok; | |
578 | bfd_vma x; | |
579 | bfd_signed_vma srel; | |
580 | ||
581 | switch (howto->type) | |
582 | { | |
583 | case R_AVR_7_PCREL: | |
584 | contents += rel->r_offset; | |
585 | srel = (bfd_signed_vma) relocation; | |
586 | srel += rel->r_addend; | |
587 | srel -= rel->r_offset; | |
a7c10850 | 588 | srel -= 2; /* Branch instructions add 2 to the PC... */ |
adde6300 AM |
589 | srel -= (input_section->output_section->vma + |
590 | input_section->output_offset); | |
591 | ||
592 | if (srel & 1) | |
593 | return bfd_reloc_outofrange; | |
594 | if (srel > ((1 << 7) - 1) || (srel < - (1 << 7))) | |
595 | return bfd_reloc_overflow; | |
596 | x = bfd_get_16 (input_bfd, contents); | |
597 | x = (x & 0xfc07) | (((srel >> 1) << 3) & 0x3f8); | |
598 | bfd_put_16 (input_bfd, x, contents); | |
599 | break; | |
600 | ||
601 | case R_AVR_13_PCREL: | |
602 | contents += rel->r_offset; | |
603 | srel = (bfd_signed_vma) relocation; | |
604 | srel += rel->r_addend; | |
605 | srel -= rel->r_offset; | |
a7c10850 | 606 | srel -= 2; /* Branch instructions add 2 to the PC... */ |
adde6300 AM |
607 | srel -= (input_section->output_section->vma + |
608 | input_section->output_offset); | |
609 | ||
610 | if (srel & 1) | |
611 | return bfd_reloc_outofrange; | |
612 | ||
df406460 NC |
613 | srel = avr_relative_distance_considering_wrap_around (srel); |
614 | ||
adde6300 AM |
615 | /* AVR addresses commands as words. */ |
616 | srel >>= 1; | |
617 | ||
618 | /* Check for overflow. */ | |
619 | if (srel < -2048 || srel > 2047) | |
620 | { | |
df406460 NC |
621 | /* Relative distance is too large. */ |
622 | ||
623 | /* Always apply WRAPAROUND for avr2 and avr4. */ | |
65aa24b6 | 624 | switch (bfd_get_mach (input_bfd)) |
adde6300 | 625 | { |
65aa24b6 NC |
626 | case bfd_mach_avr2: |
627 | case bfd_mach_avr4: | |
628 | break; | |
629 | ||
630 | default: | |
631 | return bfd_reloc_overflow; | |
adde6300 | 632 | } |
adde6300 AM |
633 | } |
634 | ||
635 | x = bfd_get_16 (input_bfd, contents); | |
636 | x = (x & 0xf000) | (srel & 0xfff); | |
637 | bfd_put_16 (input_bfd, x, contents); | |
638 | break; | |
639 | ||
640 | case R_AVR_LO8_LDI: | |
641 | contents += rel->r_offset; | |
642 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
643 | x = bfd_get_16 (input_bfd, contents); | |
644 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
645 | bfd_put_16 (input_bfd, x, contents); | |
646 | break; | |
647 | ||
750bce0e NC |
648 | case R_AVR_LDI: |
649 | contents += rel->r_offset; | |
650 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
4cdc7696 NC |
651 | if (((srel > 0) && (srel & 0xffff) > 255) |
652 | || ((srel < 0) && ((-srel) & 0xffff) > 128)) | |
df406460 NC |
653 | /* Remove offset for data/eeprom section. */ |
654 | return bfd_reloc_overflow; | |
655 | ||
750bce0e NC |
656 | x = bfd_get_16 (input_bfd, contents); |
657 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
658 | bfd_put_16 (input_bfd, x, contents); | |
659 | break; | |
660 | ||
661 | case R_AVR_6: | |
662 | contents += rel->r_offset; | |
663 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
664 | if (((srel & 0xffff) > 63) || (srel < 0)) | |
665 | /* Remove offset for data/eeprom section. */ | |
666 | return bfd_reloc_overflow; | |
667 | x = bfd_get_16 (input_bfd, contents); | |
4cdc7696 | 668 | x = (x & 0xd3f8) | ((srel & 7) | ((srel & (3 << 3)) << 7) |
df406460 | 669 | | ((srel & (1 << 5)) << 8)); |
750bce0e NC |
670 | bfd_put_16 (input_bfd, x, contents); |
671 | break; | |
672 | ||
673 | case R_AVR_6_ADIW: | |
674 | contents += rel->r_offset; | |
675 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
676 | if (((srel & 0xffff) > 63) || (srel < 0)) | |
677 | /* Remove offset for data/eeprom section. */ | |
678 | return bfd_reloc_overflow; | |
679 | x = bfd_get_16 (input_bfd, contents); | |
4cdc7696 | 680 | x = (x & 0xff30) | (srel & 0xf) | ((srel & 0x30) << 2); |
750bce0e NC |
681 | bfd_put_16 (input_bfd, x, contents); |
682 | break; | |
683 | ||
adde6300 AM |
684 | case R_AVR_HI8_LDI: |
685 | contents += rel->r_offset; | |
686 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
687 | srel = (srel >> 8) & 0xff; | |
688 | x = bfd_get_16 (input_bfd, contents); | |
689 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
690 | bfd_put_16 (input_bfd, x, contents); | |
691 | break; | |
692 | ||
693 | case R_AVR_HH8_LDI: | |
694 | contents += rel->r_offset; | |
695 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
696 | srel = (srel >> 16) & 0xff; | |
697 | x = bfd_get_16 (input_bfd, contents); | |
698 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
699 | bfd_put_16 (input_bfd, x, contents); | |
700 | break; | |
701 | ||
df406460 NC |
702 | case R_AVR_MS8_LDI: |
703 | contents += rel->r_offset; | |
704 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
705 | srel = (srel >> 24) & 0xff; | |
706 | x = bfd_get_16 (input_bfd, contents); | |
707 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
708 | bfd_put_16 (input_bfd, x, contents); | |
709 | break; | |
710 | ||
adde6300 AM |
711 | case R_AVR_LO8_LDI_NEG: |
712 | contents += rel->r_offset; | |
713 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
714 | srel = -srel; | |
715 | x = bfd_get_16 (input_bfd, contents); | |
716 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
717 | bfd_put_16 (input_bfd, x, contents); | |
718 | break; | |
719 | ||
720 | case R_AVR_HI8_LDI_NEG: | |
721 | contents += rel->r_offset; | |
722 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
723 | srel = -srel; | |
724 | srel = (srel >> 8) & 0xff; | |
725 | x = bfd_get_16 (input_bfd, contents); | |
726 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
727 | bfd_put_16 (input_bfd, x, contents); | |
728 | break; | |
729 | ||
730 | case R_AVR_HH8_LDI_NEG: | |
731 | contents += rel->r_offset; | |
732 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
733 | srel = -srel; | |
734 | srel = (srel >> 16) & 0xff; | |
735 | x = bfd_get_16 (input_bfd, contents); | |
736 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
737 | bfd_put_16 (input_bfd, x, contents); | |
738 | break; | |
739 | ||
df406460 NC |
740 | case R_AVR_MS8_LDI_NEG: |
741 | contents += rel->r_offset; | |
742 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
743 | srel = -srel; | |
744 | srel = (srel >> 24) & 0xff; | |
745 | x = bfd_get_16 (input_bfd, contents); | |
746 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
747 | bfd_put_16 (input_bfd, x, contents); | |
748 | break; | |
749 | ||
adde6300 AM |
750 | case R_AVR_LO8_LDI_PM: |
751 | contents += rel->r_offset; | |
752 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
753 | if (srel & 1) | |
754 | return bfd_reloc_outofrange; | |
755 | srel = srel >> 1; | |
756 | x = bfd_get_16 (input_bfd, contents); | |
757 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
758 | bfd_put_16 (input_bfd, x, contents); | |
759 | break; | |
760 | ||
761 | case R_AVR_HI8_LDI_PM: | |
762 | contents += rel->r_offset; | |
763 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
764 | if (srel & 1) | |
765 | return bfd_reloc_outofrange; | |
766 | srel = srel >> 1; | |
767 | srel = (srel >> 8) & 0xff; | |
768 | x = bfd_get_16 (input_bfd, contents); | |
769 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
770 | bfd_put_16 (input_bfd, x, contents); | |
771 | break; | |
772 | ||
773 | case R_AVR_HH8_LDI_PM: | |
774 | contents += rel->r_offset; | |
775 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
776 | if (srel & 1) | |
777 | return bfd_reloc_outofrange; | |
778 | srel = srel >> 1; | |
779 | srel = (srel >> 16) & 0xff; | |
780 | x = bfd_get_16 (input_bfd, contents); | |
781 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
782 | bfd_put_16 (input_bfd, x, contents); | |
783 | break; | |
784 | ||
785 | case R_AVR_LO8_LDI_PM_NEG: | |
786 | contents += rel->r_offset; | |
787 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
788 | srel = -srel; | |
789 | if (srel & 1) | |
790 | return bfd_reloc_outofrange; | |
791 | srel = srel >> 1; | |
792 | x = bfd_get_16 (input_bfd, contents); | |
793 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
794 | bfd_put_16 (input_bfd, x, contents); | |
795 | break; | |
796 | ||
797 | case R_AVR_HI8_LDI_PM_NEG: | |
798 | contents += rel->r_offset; | |
799 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
800 | srel = -srel; | |
801 | if (srel & 1) | |
802 | return bfd_reloc_outofrange; | |
803 | srel = srel >> 1; | |
804 | srel = (srel >> 8) & 0xff; | |
805 | x = bfd_get_16 (input_bfd, contents); | |
806 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
807 | bfd_put_16 (input_bfd, x, contents); | |
808 | break; | |
809 | ||
810 | case R_AVR_HH8_LDI_PM_NEG: | |
811 | contents += rel->r_offset; | |
812 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
813 | srel = -srel; | |
814 | if (srel & 1) | |
815 | return bfd_reloc_outofrange; | |
816 | srel = srel >> 1; | |
817 | srel = (srel >> 16) & 0xff; | |
818 | x = bfd_get_16 (input_bfd, contents); | |
819 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
820 | bfd_put_16 (input_bfd, x, contents); | |
821 | break; | |
822 | ||
823 | case R_AVR_CALL: | |
824 | contents += rel->r_offset; | |
825 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
826 | if (srel & 1) | |
827 | return bfd_reloc_outofrange; | |
828 | srel = srel >> 1; | |
829 | x = bfd_get_16 (input_bfd, contents); | |
830 | x |= ((srel & 0x10000) | ((srel << 3) & 0x1f00000)) >> 16; | |
831 | bfd_put_16 (input_bfd, x, contents); | |
dc810e39 | 832 | bfd_put_16 (input_bfd, (bfd_vma) srel & 0xffff, contents+2); |
adde6300 AM |
833 | break; |
834 | ||
835 | default: | |
836 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
837 | contents, rel->r_offset, | |
838 | relocation, rel->r_addend); | |
839 | } | |
840 | ||
841 | return r; | |
842 | } | |
843 | ||
844 | /* Relocate an AVR ELF section. */ | |
4cdc7696 | 845 | |
b34976b6 | 846 | static bfd_boolean |
4cdc7696 NC |
847 | elf32_avr_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED, |
848 | struct bfd_link_info *info, | |
849 | bfd *input_bfd, | |
850 | asection *input_section, | |
851 | bfd_byte *contents, | |
852 | Elf_Internal_Rela *relocs, | |
853 | Elf_Internal_Sym *local_syms, | |
854 | asection **local_sections) | |
adde6300 AM |
855 | { |
856 | Elf_Internal_Shdr * symtab_hdr; | |
857 | struct elf_link_hash_entry ** sym_hashes; | |
858 | Elf_Internal_Rela * rel; | |
859 | Elf_Internal_Rela * relend; | |
860 | ||
1049f94e | 861 | if (info->relocatable) |
b34976b6 | 862 | return TRUE; |
f0fe0e16 | 863 | |
adde6300 AM |
864 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
865 | sym_hashes = elf_sym_hashes (input_bfd); | |
866 | relend = relocs + input_section->reloc_count; | |
867 | ||
868 | for (rel = relocs; rel < relend; rel ++) | |
869 | { | |
870 | reloc_howto_type * howto; | |
871 | unsigned long r_symndx; | |
872 | Elf_Internal_Sym * sym; | |
873 | asection * sec; | |
874 | struct elf_link_hash_entry * h; | |
875 | bfd_vma relocation; | |
876 | bfd_reloc_status_type r; | |
dfeffb9f | 877 | const char * name; |
adde6300 AM |
878 | int r_type; |
879 | ||
f0fe0e16 | 880 | /* This is a final link. */ |
adde6300 AM |
881 | r_type = ELF32_R_TYPE (rel->r_info); |
882 | r_symndx = ELF32_R_SYM (rel->r_info); | |
adde6300 AM |
883 | howto = elf_avr_howto_table + ELF32_R_TYPE (rel->r_info); |
884 | h = NULL; | |
885 | sym = NULL; | |
886 | sec = NULL; | |
887 | ||
888 | if (r_symndx < symtab_hdr->sh_info) | |
889 | { | |
890 | sym = local_syms + r_symndx; | |
891 | sec = local_sections [r_symndx]; | |
8517fae7 | 892 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
adde6300 AM |
893 | |
894 | name = bfd_elf_string_from_elf_section | |
895 | (input_bfd, symtab_hdr->sh_link, sym->st_name); | |
896 | name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; | |
897 | } | |
898 | else | |
899 | { | |
59c2e50f | 900 | bfd_boolean unresolved_reloc, warned; |
adde6300 | 901 | |
b2a8e766 AM |
902 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
903 | r_symndx, symtab_hdr, sym_hashes, | |
904 | h, sec, relocation, | |
905 | unresolved_reloc, warned); | |
dfeffb9f L |
906 | |
907 | name = h->root.root.string; | |
adde6300 AM |
908 | } |
909 | ||
910 | r = avr_final_link_relocate (howto, input_bfd, input_section, | |
911 | contents, rel, relocation); | |
912 | ||
913 | if (r != bfd_reloc_ok) | |
914 | { | |
915 | const char * msg = (const char *) NULL; | |
916 | ||
917 | switch (r) | |
918 | { | |
919 | case bfd_reloc_overflow: | |
920 | r = info->callbacks->reloc_overflow | |
dfeffb9f L |
921 | (info, (h ? &h->root : NULL), |
922 | name, howto->name, (bfd_vma) 0, | |
adde6300 AM |
923 | input_bfd, input_section, rel->r_offset); |
924 | break; | |
925 | ||
926 | case bfd_reloc_undefined: | |
927 | r = info->callbacks->undefined_symbol | |
b34976b6 | 928 | (info, name, input_bfd, input_section, rel->r_offset, TRUE); |
adde6300 AM |
929 | break; |
930 | ||
931 | case bfd_reloc_outofrange: | |
932 | msg = _("internal error: out of range error"); | |
933 | break; | |
934 | ||
935 | case bfd_reloc_notsupported: | |
936 | msg = _("internal error: unsupported relocation error"); | |
937 | break; | |
938 | ||
939 | case bfd_reloc_dangerous: | |
940 | msg = _("internal error: dangerous relocation"); | |
941 | break; | |
942 | ||
943 | default: | |
944 | msg = _("internal error: unknown error"); | |
945 | break; | |
946 | } | |
947 | ||
948 | if (msg) | |
949 | r = info->callbacks->warning | |
950 | (info, msg, name, input_bfd, input_section, rel->r_offset); | |
951 | ||
952 | if (! r) | |
b34976b6 | 953 | return FALSE; |
adde6300 AM |
954 | } |
955 | } | |
956 | ||
b34976b6 | 957 | return TRUE; |
adde6300 AM |
958 | } |
959 | ||
960 | /* The final processing done just before writing out a AVR ELF object | |
961 | file. This gets the AVR architecture right based on the machine | |
962 | number. */ | |
963 | ||
964 | static void | |
4cdc7696 NC |
965 | bfd_elf_avr_final_write_processing (bfd *abfd, |
966 | bfd_boolean linker ATTRIBUTE_UNUSED) | |
adde6300 AM |
967 | { |
968 | unsigned long val; | |
969 | ||
970 | switch (bfd_get_mach (abfd)) | |
971 | { | |
972 | default: | |
973 | case bfd_mach_avr2: | |
974 | val = E_AVR_MACH_AVR2; | |
975 | break; | |
976 | ||
977 | case bfd_mach_avr1: | |
978 | val = E_AVR_MACH_AVR1; | |
979 | break; | |
980 | ||
981 | case bfd_mach_avr3: | |
982 | val = E_AVR_MACH_AVR3; | |
983 | break; | |
984 | ||
985 | case bfd_mach_avr4: | |
986 | val = E_AVR_MACH_AVR4; | |
987 | break; | |
988 | ||
65aa24b6 NC |
989 | case bfd_mach_avr5: |
990 | val = E_AVR_MACH_AVR5; | |
991 | break; | |
adde6300 AM |
992 | } |
993 | ||
994 | elf_elfheader (abfd)->e_machine = EM_AVR; | |
995 | elf_elfheader (abfd)->e_flags &= ~ EF_AVR_MACH; | |
996 | elf_elfheader (abfd)->e_flags |= val; | |
df406460 | 997 | elf_elfheader (abfd)->e_flags |= EF_AVR_LINKRELAX_PREPARED; |
adde6300 AM |
998 | } |
999 | ||
1000 | /* Set the right machine number. */ | |
1001 | ||
b34976b6 | 1002 | static bfd_boolean |
4cdc7696 | 1003 | elf32_avr_object_p (bfd *abfd) |
adde6300 | 1004 | { |
dc810e39 | 1005 | unsigned int e_set = bfd_mach_avr2; |
4cdc7696 | 1006 | |
aa4f99bb AO |
1007 | if (elf_elfheader (abfd)->e_machine == EM_AVR |
1008 | || elf_elfheader (abfd)->e_machine == EM_AVR_OLD) | |
adde6300 AM |
1009 | { |
1010 | int e_mach = elf_elfheader (abfd)->e_flags & EF_AVR_MACH; | |
4cdc7696 | 1011 | |
adde6300 AM |
1012 | switch (e_mach) |
1013 | { | |
1014 | default: | |
1015 | case E_AVR_MACH_AVR2: | |
1016 | e_set = bfd_mach_avr2; | |
1017 | break; | |
1018 | ||
1019 | case E_AVR_MACH_AVR1: | |
1020 | e_set = bfd_mach_avr1; | |
1021 | break; | |
1022 | ||
1023 | case E_AVR_MACH_AVR3: | |
1024 | e_set = bfd_mach_avr3; | |
1025 | break; | |
1026 | ||
1027 | case E_AVR_MACH_AVR4: | |
1028 | e_set = bfd_mach_avr4; | |
1029 | break; | |
65aa24b6 NC |
1030 | |
1031 | case E_AVR_MACH_AVR5: | |
1032 | e_set = bfd_mach_avr5; | |
1033 | break; | |
adde6300 AM |
1034 | } |
1035 | } | |
1036 | return bfd_default_set_arch_mach (abfd, bfd_arch_avr, | |
1037 | e_set); | |
1038 | } | |
1039 | ||
df406460 NC |
1040 | |
1041 | /* Enable debugging printout at stdout with a value of 1. */ | |
1042 | #define DEBUG_RELAX 0 | |
1043 | ||
4cdc7696 NC |
1044 | /* Delete some bytes from a section while changing the size of an instruction. |
1045 | The parameter "addr" denotes the section-relative offset pointing just | |
1046 | behind the shrinked instruction. "addr+count" point at the first | |
1047 | byte just behind the original unshrinked instruction. */ | |
1048 | ||
1049 | static bfd_boolean | |
1050 | elf32_avr_relax_delete_bytes (bfd *abfd, | |
73160847 | 1051 | asection *sec, |
4cdc7696 | 1052 | bfd_vma addr, |
73160847 | 1053 | int count) |
4cdc7696 NC |
1054 | { |
1055 | Elf_Internal_Shdr *symtab_hdr; | |
1056 | unsigned int sec_shndx; | |
1057 | bfd_byte *contents; | |
1058 | Elf_Internal_Rela *irel, *irelend; | |
1059 | Elf_Internal_Rela *irelalign; | |
1060 | Elf_Internal_Sym *isym; | |
1061 | Elf_Internal_Sym *isymbuf = NULL; | |
1062 | Elf_Internal_Sym *isymend; | |
1063 | bfd_vma toaddr; | |
1064 | struct elf_link_hash_entry **sym_hashes; | |
1065 | struct elf_link_hash_entry **end_hashes; | |
1066 | unsigned int symcount; | |
1067 | ||
1068 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1069 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); | |
1070 | contents = elf_section_data (sec)->this_hdr.contents; | |
1071 | ||
1072 | /* The deletion must stop at the next ALIGN reloc for an aligment | |
1073 | power larger than the number of bytes we are deleting. */ | |
1074 | ||
1075 | irelalign = NULL; | |
1076 | toaddr = sec->size; | |
1077 | ||
1078 | irel = elf_section_data (sec)->relocs; | |
1079 | irelend = irel + sec->reloc_count; | |
1080 | ||
1081 | /* Actually delete the bytes. */ | |
1082 | if (toaddr - addr - count > 0) | |
1083 | memmove (contents + addr, contents + addr + count, | |
1084 | (size_t) (toaddr - addr - count)); | |
1085 | sec->size -= count; | |
1086 | ||
73160847 | 1087 | /* Adjust all the reloc addresses. */ |
4cdc7696 NC |
1088 | for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) |
1089 | { | |
4cdc7696 NC |
1090 | bfd_vma old_reloc_address; |
1091 | bfd_vma shrinked_insn_address; | |
1092 | ||
1093 | old_reloc_address = (sec->output_section->vma | |
1094 | + sec->output_offset + irel->r_offset); | |
1095 | shrinked_insn_address = (sec->output_section->vma | |
1096 | + sec->output_offset + addr - count); | |
1097 | ||
1098 | /* Get the new reloc address. */ | |
1099 | if ((irel->r_offset > addr | |
1100 | && irel->r_offset < toaddr)) | |
1101 | { | |
1102 | if (DEBUG_RELAX) | |
1103 | printf ("Relocation at address 0x%x needs to be moved.\n" | |
1104 | "Old section offset: 0x%x, New section offset: 0x%x \n", | |
1105 | (unsigned int) old_reloc_address, | |
1106 | (unsigned int) irel->r_offset, | |
1107 | (unsigned int) ((irel->r_offset) - count)); | |
1108 | ||
1109 | irel->r_offset -= count; | |
1110 | } | |
1111 | ||
73160847 | 1112 | } |
4cdc7696 | 1113 | |
73160847 NC |
1114 | /* The reloc's own addresses are now ok. However, we need to readjust |
1115 | the reloc's addend, i.e. the reloc's value if two conditions are met: | |
1116 | 1.) the reloc is relative to a symbol in this section that | |
1117 | is located in front of the shrinked instruction | |
1118 | 2.) symbol plus addend end up behind the shrinked instruction. | |
1119 | ||
1120 | The most common case where this happens are relocs relative to | |
1121 | the section-start symbol. | |
1122 | ||
1123 | This step needs to be done for all of the sections of the bfd. */ | |
1124 | ||
1125 | { | |
1126 | struct bfd_section *isec; | |
1127 | ||
1128 | for (isec = abfd->sections; isec; isec = isec->next) | |
1129 | { | |
1130 | bfd_vma symval; | |
1131 | bfd_vma shrinked_insn_address; | |
1132 | ||
1133 | shrinked_insn_address = (sec->output_section->vma | |
1134 | + sec->output_offset + addr - count); | |
1135 | ||
1136 | irelend = elf_section_data (isec)->relocs + isec->reloc_count; | |
1137 | for (irel = elf_section_data (isec)->relocs; | |
1138 | irel < irelend; | |
1139 | irel++) | |
1140 | { | |
1141 | /* Read this BFD's local symbols if we haven't done | |
1142 | so already. */ | |
1143 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) | |
1144 | { | |
1145 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
1146 | if (isymbuf == NULL) | |
1147 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
1148 | symtab_hdr->sh_info, 0, | |
1149 | NULL, NULL, NULL); | |
1150 | if (isymbuf == NULL) | |
1151 | return FALSE; | |
1152 | } | |
1153 | ||
1154 | /* Get the value of the symbol referred to by the reloc. */ | |
1155 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
1156 | { | |
1157 | /* A local symbol. */ | |
1158 | Elf_Internal_Sym *isym; | |
1159 | asection *sym_sec; | |
1160 | ||
1161 | isym = isymbuf + ELF32_R_SYM (irel->r_info); | |
1162 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
1163 | symval = isym->st_value; | |
1164 | /* If the reloc is absolute, it will not have | |
1165 | a symbol or section associated with it. */ | |
1166 | if (sym_sec == sec) | |
1167 | { | |
1168 | symval += sym_sec->output_section->vma | |
1169 | + sym_sec->output_offset; | |
4cdc7696 NC |
1170 | |
1171 | if (DEBUG_RELAX) | |
73160847 NC |
1172 | printf ("Checking if the relocation's " |
1173 | "addend needs corrections.\n" | |
1174 | "Address of anchor symbol: 0x%x \n" | |
1175 | "Address of relocation target: 0x%x \n" | |
1176 | "Address of relaxed insn: 0x%x \n", | |
1177 | (unsigned int) symval, | |
1178 | (unsigned int) (symval + irel->r_addend), | |
1179 | (unsigned int) shrinked_insn_address); | |
1180 | ||
1181 | if (symval <= shrinked_insn_address | |
1182 | && (symval + irel->r_addend) > shrinked_insn_address) | |
1183 | { | |
1184 | irel->r_addend -= count; | |
1185 | ||
1186 | if (DEBUG_RELAX) | |
1187 | printf ("Relocation's addend needed to be fixed \n"); | |
1188 | } | |
4cdc7696 | 1189 | } |
73160847 NC |
1190 | /* else...Reference symbol is absolute. No adjustment needed. */ |
1191 | } | |
1192 | /* else...Reference symbol is extern. No need for adjusting | |
1193 | the addend. */ | |
1194 | } | |
1195 | } | |
1196 | } | |
4cdc7696 NC |
1197 | |
1198 | /* Adjust the local symbols defined in this section. */ | |
1199 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; | |
1200 | isymend = isym + symtab_hdr->sh_info; | |
1201 | for (; isym < isymend; isym++) | |
1202 | { | |
1203 | if (isym->st_shndx == sec_shndx | |
1204 | && isym->st_value > addr | |
1205 | && isym->st_value < toaddr) | |
1206 | isym->st_value -= count; | |
1207 | } | |
1208 | ||
1209 | /* Now adjust the global symbols defined in this section. */ | |
1210 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) | |
1211 | - symtab_hdr->sh_info); | |
1212 | sym_hashes = elf_sym_hashes (abfd); | |
1213 | end_hashes = sym_hashes + symcount; | |
1214 | for (; sym_hashes < end_hashes; sym_hashes++) | |
1215 | { | |
1216 | struct elf_link_hash_entry *sym_hash = *sym_hashes; | |
1217 | if ((sym_hash->root.type == bfd_link_hash_defined | |
1218 | || sym_hash->root.type == bfd_link_hash_defweak) | |
1219 | && sym_hash->root.u.def.section == sec | |
1220 | && sym_hash->root.u.def.value > addr | |
1221 | && sym_hash->root.u.def.value < toaddr) | |
1222 | { | |
1223 | sym_hash->root.u.def.value -= count; | |
1224 | } | |
1225 | } | |
1226 | ||
1227 | return TRUE; | |
1228 | } | |
1229 | ||
df406460 NC |
1230 | /* This function handles relaxing for the avr. |
1231 | Many important relaxing opportunities within functions are already | |
1232 | realized by the compiler itself. | |
1233 | Here we try to replace call (4 bytes) -> rcall (2 bytes) | |
4cdc7696 NC |
1234 | and jump -> rjmp (safes also 2 bytes). |
1235 | As well we now optimize seqences of | |
df406460 NC |
1236 | - call/rcall function |
1237 | - ret | |
1238 | to yield | |
1239 | - jmp/rjmp function | |
1240 | - ret | |
1241 | . In case that within a sequence | |
1242 | - jmp/rjmp label | |
1243 | - ret | |
1244 | the ret could no longer be reached it is optimized away. In order | |
1245 | to check if the ret is no longer needed, it is checked that the ret's address | |
1246 | is not the target of a branch or jump within the same section, it is checked | |
1247 | that there is no skip instruction before the jmp/rjmp and that there | |
1248 | is no local or global label place at the address of the ret. | |
4cdc7696 | 1249 | |
df406460 | 1250 | We refrain from relaxing within sections ".vectors" and |
4cdc7696 | 1251 | ".jumptables" in order to maintain the position of the instructions. |
df406460 | 1252 | There, however, we substitute jmp/call by a sequence rjmp,nop/rcall,nop |
4cdc7696 | 1253 | if possible. (In future one could possibly use the space of the nop |
df406460 NC |
1254 | for the first instruction of the irq service function. |
1255 | ||
1256 | The .jumptables sections is meant to be used for a future tablejump variant | |
1257 | for the devices with 3-byte program counter where the table itself | |
4cdc7696 | 1258 | contains 4-byte jump instructions whose relative offset must not |
df406460 | 1259 | be changed. */ |
4cdc7696 | 1260 | |
df406460 | 1261 | static bfd_boolean |
4cdc7696 NC |
1262 | elf32_avr_relax_section (bfd *abfd, |
1263 | asection *sec, | |
df406460 NC |
1264 | struct bfd_link_info *link_info, |
1265 | bfd_boolean *again) | |
1266 | { | |
1267 | Elf_Internal_Shdr *symtab_hdr; | |
1268 | Elf_Internal_Rela *internal_relocs; | |
1269 | Elf_Internal_Rela *irel, *irelend; | |
1270 | bfd_byte *contents = NULL; | |
1271 | Elf_Internal_Sym *isymbuf = NULL; | |
1272 | static asection *last_input_section = NULL; | |
1273 | static Elf_Internal_Rela *last_reloc = NULL; | |
1274 | ||
1275 | /* Assume nothing changes. */ | |
1276 | *again = FALSE; | |
1277 | ||
1278 | /* We don't have to do anything for a relocatable link, if | |
1279 | this section does not have relocs, or if this is not a | |
1280 | code section. */ | |
1281 | if (link_info->relocatable | |
1282 | || (sec->flags & SEC_RELOC) == 0 | |
1283 | || sec->reloc_count == 0 | |
1284 | || (sec->flags & SEC_CODE) == 0) | |
1285 | return TRUE; | |
4cdc7696 | 1286 | |
df406460 NC |
1287 | /* Check if the object file to relax uses internal symbols so that we |
1288 | could fix up the relocations. */ | |
df406460 NC |
1289 | if (!(elf_elfheader (abfd)->e_flags & EF_AVR_LINKRELAX_PREPARED)) |
1290 | return TRUE; | |
df406460 NC |
1291 | |
1292 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1293 | ||
1294 | /* Get a copy of the native relocations. */ | |
1295 | internal_relocs = (_bfd_elf_link_read_relocs | |
4cdc7696 | 1296 | (abfd, sec, NULL, NULL, link_info->keep_memory)); |
df406460 NC |
1297 | if (internal_relocs == NULL) |
1298 | goto error_return; | |
1299 | ||
1300 | if (sec != last_input_section) | |
1301 | last_reloc = NULL; | |
1302 | ||
1303 | last_input_section = sec; | |
1304 | ||
1305 | /* Walk through the relocs looking for relaxing opportunities. */ | |
1306 | irelend = internal_relocs + sec->reloc_count; | |
1307 | for (irel = internal_relocs; irel < irelend; irel++) | |
1308 | { | |
1309 | bfd_vma symval; | |
1310 | ||
4cdc7696 | 1311 | if ( ELF32_R_TYPE (irel->r_info) != R_AVR_13_PCREL |
df406460 NC |
1312 | && ELF32_R_TYPE (irel->r_info) != R_AVR_7_PCREL |
1313 | && ELF32_R_TYPE (irel->r_info) != R_AVR_CALL) | |
1314 | continue; | |
4cdc7696 | 1315 | |
df406460 NC |
1316 | /* Get the section contents if we haven't done so already. */ |
1317 | if (contents == NULL) | |
1318 | { | |
1319 | /* Get cached copy if it exists. */ | |
1320 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1321 | contents = elf_section_data (sec)->this_hdr.contents; | |
1322 | else | |
1323 | { | |
1324 | /* Go get them off disk. */ | |
4cdc7696 | 1325 | if (! bfd_malloc_and_get_section (abfd, sec, &contents)) |
df406460 NC |
1326 | goto error_return; |
1327 | } | |
1328 | } | |
1329 | ||
1330 | /* Read this BFD's local symbols if we haven't done so already. */ | |
1331 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) | |
1332 | { | |
1333 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
1334 | if (isymbuf == NULL) | |
1335 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
1336 | symtab_hdr->sh_info, 0, | |
1337 | NULL, NULL, NULL); | |
1338 | if (isymbuf == NULL) | |
1339 | goto error_return; | |
1340 | } | |
1341 | ||
1342 | ||
1343 | /* Get the value of the symbol referred to by the reloc. */ | |
1344 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
1345 | { | |
1346 | /* A local symbol. */ | |
1347 | Elf_Internal_Sym *isym; | |
1348 | asection *sym_sec; | |
1349 | ||
1350 | isym = isymbuf + ELF32_R_SYM (irel->r_info); | |
1351 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
1352 | symval = isym->st_value; | |
1353 | /* If the reloc is absolute, it will not have | |
1354 | a symbol or section associated with it. */ | |
1355 | if (sym_sec) | |
1356 | symval += sym_sec->output_section->vma | |
1357 | + sym_sec->output_offset; | |
1358 | } | |
1359 | else | |
1360 | { | |
1361 | unsigned long indx; | |
1362 | struct elf_link_hash_entry *h; | |
1363 | ||
1364 | /* An external symbol. */ | |
1365 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; | |
1366 | h = elf_sym_hashes (abfd)[indx]; | |
1367 | BFD_ASSERT (h != NULL); | |
1368 | if (h->root.type != bfd_link_hash_defined | |
1369 | && h->root.type != bfd_link_hash_defweak) | |
4cdc7696 NC |
1370 | /* This appears to be a reference to an undefined |
1371 | symbol. Just ignore it--it will be caught by the | |
1372 | regular reloc processing. */ | |
1373 | continue; | |
1374 | ||
df406460 NC |
1375 | symval = (h->root.u.def.value |
1376 | + h->root.u.def.section->output_section->vma | |
1377 | + h->root.u.def.section->output_offset); | |
1378 | } | |
1379 | ||
1380 | /* For simplicity of coding, we are going to modify the section | |
1381 | contents, the section relocs, and the BFD symbol table. We | |
1382 | must tell the rest of the code not to free up this | |
1383 | information. It would be possible to instead create a table | |
1384 | of changes which have to be made, as is done in coff-mips.c; | |
1385 | that would be more work, but would require less memory when | |
1386 | the linker is run. */ | |
1387 | switch (ELF32_R_TYPE (irel->r_info)) | |
1388 | { | |
1389 | /* Try to turn a 22-bit absolute call/jump into an 13-bit | |
1390 | pc-relative rcall/rjmp. */ | |
1391 | case R_AVR_CALL: | |
1392 | { | |
1393 | bfd_vma value = symval + irel->r_addend; | |
1394 | bfd_vma dot, gap; | |
1395 | int distance_short_enough = 0; | |
1396 | ||
1397 | /* Get the address of this instruction. */ | |
1398 | dot = (sec->output_section->vma | |
1399 | + sec->output_offset + irel->r_offset); | |
1400 | ||
1401 | /* Compute the distance from this insn to the branch target. */ | |
1402 | gap = value - dot; | |
1403 | ||
1404 | /* If the distance is within -4094..+4098 inclusive, then we can | |
1405 | relax this jump/call. +4098 because the call/jump target | |
4cdc7696 | 1406 | will be closer after the relaxation. */ |
df406460 NC |
1407 | if ((int) gap >= -4094 && (int) gap <= 4098) |
1408 | distance_short_enough = 1; | |
1409 | ||
1410 | /* Here we handle the wrap-around case. E.g. for a 16k device | |
4cdc7696 | 1411 | we could use a rjmp to jump from address 0x100 to 0x3d00! |
df406460 NC |
1412 | In order to make this work properly, we need to fill the |
1413 | vaiable avr_pc_wrap_around with the appropriate value. | |
1414 | I.e. 0x4000 for a 16k device. */ | |
1415 | { | |
1416 | /* Shrinking the code size makes the gaps larger in the | |
1417 | case of wrap-arounds. So we use a heuristical safety | |
1418 | margin to avoid that during relax the distance gets | |
1419 | again too large for the short jumps. Let's assume | |
1420 | a typical code-size reduction due to relax for a | |
1421 | 16k device of 600 bytes. So let's use twice the | |
4cdc7696 | 1422 | typical value as safety margin. */ |
df406460 NC |
1423 | int rgap; |
1424 | int safety_margin; | |
1425 | ||
1426 | int assumed_shrink = 600; | |
1427 | if (avr_pc_wrap_around > 0x4000) | |
1428 | assumed_shrink = 900; | |
4cdc7696 | 1429 | |
df406460 NC |
1430 | safety_margin = 2 * assumed_shrink; |
1431 | ||
1432 | rgap = avr_relative_distance_considering_wrap_around (gap); | |
4cdc7696 NC |
1433 | |
1434 | if (rgap >= (-4092 + safety_margin) | |
df406460 | 1435 | && rgap <= (4094 - safety_margin)) |
4cdc7696 NC |
1436 | distance_short_enough = 1; |
1437 | } | |
df406460 NC |
1438 | |
1439 | if (distance_short_enough) | |
1440 | { | |
1441 | unsigned char code_msb; | |
1442 | unsigned char code_lsb; | |
1443 | ||
1444 | if (DEBUG_RELAX) | |
1445 | printf ("shrinking jump/call instruction at address 0x%x" | |
1446 | " in section %s\n\n", | |
1447 | (int) dot, sec->name); | |
1448 | ||
1449 | /* Note that we've changed the relocs, section contents, | |
1450 | etc. */ | |
1451 | elf_section_data (sec)->relocs = internal_relocs; | |
1452 | elf_section_data (sec)->this_hdr.contents = contents; | |
1453 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
1454 | ||
1455 | /* Get the instruction code for relaxing. */ | |
1456 | code_lsb = bfd_get_8 (abfd, contents + irel->r_offset); | |
1457 | code_msb = bfd_get_8 (abfd, contents + irel->r_offset + 1); | |
1458 | ||
1459 | /* Mask out the relocation bits. */ | |
1460 | code_msb &= 0x94; | |
1461 | code_lsb &= 0x0E; | |
1462 | if (code_msb == 0x94 && code_lsb == 0x0E) | |
1463 | { | |
1464 | /* we are changing call -> rcall . */ | |
1465 | bfd_put_8 (abfd, 0x00, contents + irel->r_offset); | |
1466 | bfd_put_8 (abfd, 0xD0, contents + irel->r_offset + 1); | |
1467 | } | |
1468 | else if (code_msb == 0x94 && code_lsb == 0x0C) | |
1469 | { | |
1470 | /* we are changeing jump -> rjmp. */ | |
1471 | bfd_put_8 (abfd, 0x00, contents + irel->r_offset); | |
1472 | bfd_put_8 (abfd, 0xC0, contents + irel->r_offset + 1); | |
1473 | } | |
4cdc7696 | 1474 | else |
df406460 NC |
1475 | abort (); |
1476 | ||
1477 | /* Fix the relocation's type. */ | |
1478 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
1479 | R_AVR_13_PCREL); | |
1480 | ||
1481 | /* Check for the vector section. There we don't want to | |
1482 | modify the ordering! */ | |
1483 | ||
1484 | if (!strcmp (sec->name,".vectors") | |
1485 | || !strcmp (sec->name,".jumptables")) | |
1486 | { | |
1487 | /* Let's insert a nop. */ | |
1488 | bfd_put_8 (abfd, 0x00, contents + irel->r_offset + 2); | |
1489 | bfd_put_8 (abfd, 0x00, contents + irel->r_offset + 3); | |
1490 | } | |
1491 | else | |
1492 | { | |
1493 | /* Delete two bytes of data. */ | |
1494 | if (!elf32_avr_relax_delete_bytes (abfd, sec, | |
1495 | irel->r_offset + 2, 2)) | |
1496 | goto error_return; | |
1497 | ||
1498 | /* That will change things, so, we should relax again. | |
1499 | Note that this is not required, and it may be slow. */ | |
1500 | *again = TRUE; | |
1501 | } | |
1502 | } | |
1503 | } | |
4cdc7696 | 1504 | |
df406460 NC |
1505 | default: |
1506 | { | |
1507 | unsigned char code_msb; | |
1508 | unsigned char code_lsb; | |
1509 | bfd_vma dot; | |
1510 | ||
1511 | code_msb = bfd_get_8 (abfd, contents + irel->r_offset + 1); | |
1512 | code_lsb = bfd_get_8 (abfd, contents + irel->r_offset + 0); | |
1513 | ||
1514 | /* Get the address of this instruction. */ | |
1515 | dot = (sec->output_section->vma | |
1516 | + sec->output_offset + irel->r_offset); | |
4cdc7696 NC |
1517 | |
1518 | /* Here we look for rcall/ret or call/ret sequences that could be | |
df406460 NC |
1519 | safely replaced by rjmp/ret or jmp/ret */ |
1520 | if (0xd0 == (code_msb & 0xf0)) | |
1521 | { | |
1522 | /* This insn is a rcall. */ | |
1523 | unsigned char next_insn_msb = 0; | |
1524 | unsigned char next_insn_lsb = 0; | |
1525 | ||
1526 | if (irel->r_offset + 3 < sec->size) | |
1527 | { | |
4cdc7696 | 1528 | next_insn_msb = |
df406460 | 1529 | bfd_get_8 (abfd, contents + irel->r_offset + 3); |
4cdc7696 | 1530 | next_insn_lsb = |
df406460 NC |
1531 | bfd_get_8 (abfd, contents + irel->r_offset + 2); |
1532 | } | |
4cdc7696 NC |
1533 | |
1534 | if ((0x95 == next_insn_msb) && (0x08 == next_insn_lsb)) | |
df406460 NC |
1535 | { |
1536 | /* The next insn is a ret. We now convert the rcall insn | |
1537 | into a rjmp instruction. */ | |
df406460 NC |
1538 | code_msb &= 0xef; |
1539 | bfd_put_8 (abfd, code_msb, contents + irel->r_offset + 1); | |
1540 | if (DEBUG_RELAX) | |
1541 | printf ("converted rcall/ret sequence at address 0x%x" | |
1542 | " into rjmp/ret sequence. Section is %s\n\n", | |
1543 | (int) dot, sec->name); | |
1544 | *again = TRUE; | |
1545 | break; | |
1546 | } | |
1547 | } | |
1548 | else if ((0x94 == (code_msb & 0xfe)) | |
1549 | && (0x0e == (code_lsb & 0x0e))) | |
1550 | { | |
1551 | /* This insn is a call. */ | |
1552 | unsigned char next_insn_msb = 0; | |
1553 | unsigned char next_insn_lsb = 0; | |
1554 | ||
1555 | if (irel->r_offset + 5 < sec->size) | |
1556 | { | |
1557 | next_insn_msb = | |
1558 | bfd_get_8 (abfd, contents + irel->r_offset + 5); | |
1559 | next_insn_lsb = | |
1560 | bfd_get_8 (abfd, contents + irel->r_offset + 4); | |
1561 | } | |
4cdc7696 | 1562 | |
df406460 NC |
1563 | if ((0x95 == next_insn_msb) && (0x08 == next_insn_lsb)) |
1564 | { | |
1565 | /* The next insn is a ret. We now convert the call insn | |
1566 | into a jmp instruction. */ | |
1567 | ||
1568 | code_lsb &= 0xfd; | |
1569 | bfd_put_8 (abfd, code_lsb, contents + irel->r_offset); | |
1570 | if (DEBUG_RELAX) | |
1571 | printf ("converted call/ret sequence at address 0x%x" | |
1572 | " into jmp/ret sequence. Section is %s\n\n", | |
1573 | (int) dot, sec->name); | |
1574 | *again = TRUE; | |
1575 | break; | |
1576 | } | |
1577 | } | |
4cdc7696 NC |
1578 | else if ((0xc0 == (code_msb & 0xf0)) |
1579 | || ((0x94 == (code_msb & 0xfe)) | |
df406460 NC |
1580 | && (0x0c == (code_lsb & 0x0e)))) |
1581 | { | |
4cdc7696 | 1582 | /* This insn is a rjmp or a jmp. */ |
df406460 NC |
1583 | unsigned char next_insn_msb = 0; |
1584 | unsigned char next_insn_lsb = 0; | |
1585 | int insn_size; | |
1586 | ||
1587 | if (0xc0 == (code_msb & 0xf0)) | |
1588 | insn_size = 2; /* rjmp insn */ | |
1589 | else | |
1590 | insn_size = 4; /* jmp insn */ | |
1591 | ||
1592 | if (irel->r_offset + insn_size + 1 < sec->size) | |
1593 | { | |
4cdc7696 NC |
1594 | next_insn_msb = |
1595 | bfd_get_8 (abfd, contents + irel->r_offset | |
df406460 | 1596 | + insn_size + 1); |
4cdc7696 NC |
1597 | next_insn_lsb = |
1598 | bfd_get_8 (abfd, contents + irel->r_offset | |
df406460 NC |
1599 | + insn_size); |
1600 | } | |
1601 | ||
1602 | if ((0x95 == next_insn_msb) && (0x08 == next_insn_lsb)) | |
1603 | { | |
1604 | /* The next insn is a ret. We possibly could delete | |
1605 | this ret. First we need to check for preceeding | |
1606 | sbis/sbic/sbrs or cpse "skip" instructions. */ | |
1607 | ||
1608 | int there_is_preceeding_non_skip_insn = 1; | |
1609 | bfd_vma address_of_ret; | |
1610 | ||
1611 | address_of_ret = dot + insn_size; | |
1612 | ||
1613 | if (DEBUG_RELAX && (insn_size == 2)) | |
4cdc7696 | 1614 | printf ("found rjmp / ret sequence at address 0x%x\n", |
df406460 NC |
1615 | (int) dot); |
1616 | if (DEBUG_RELAX && (insn_size == 4)) | |
4cdc7696 | 1617 | printf ("found jmp / ret sequence at address 0x%x\n", |
df406460 NC |
1618 | (int) dot); |
1619 | ||
1620 | /* We have to make sure that there is a preceeding insn. */ | |
1621 | if (irel->r_offset >= 2) | |
1622 | { | |
1623 | unsigned char preceeding_msb; | |
1624 | unsigned char preceeding_lsb; | |
4cdc7696 | 1625 | preceeding_msb = |
df406460 | 1626 | bfd_get_8 (abfd, contents + irel->r_offset - 1); |
4cdc7696 | 1627 | preceeding_lsb = |
df406460 NC |
1628 | bfd_get_8 (abfd, contents + irel->r_offset - 2); |
1629 | ||
1630 | /* sbic. */ | |
4cdc7696 | 1631 | if (0x99 == preceeding_msb) |
df406460 NC |
1632 | there_is_preceeding_non_skip_insn = 0; |
1633 | ||
1634 | /* sbis. */ | |
4cdc7696 | 1635 | if (0x9b == preceeding_msb) |
df406460 NC |
1636 | there_is_preceeding_non_skip_insn = 0; |
1637 | ||
1638 | /* sbrc */ | |
1639 | if ((0xfc == (preceeding_msb & 0xfe) | |
1640 | && (0x00 == (preceeding_lsb & 0x08)))) | |
1641 | there_is_preceeding_non_skip_insn = 0; | |
1642 | ||
4cdc7696 | 1643 | /* sbrs */ |
df406460 NC |
1644 | if ((0xfe == (preceeding_msb & 0xfe) |
1645 | && (0x00 == (preceeding_lsb & 0x08)))) | |
1646 | there_is_preceeding_non_skip_insn = 0; | |
4cdc7696 | 1647 | |
df406460 NC |
1648 | /* cpse */ |
1649 | if (0x10 == (preceeding_msb & 0xfc)) | |
1650 | there_is_preceeding_non_skip_insn = 0; | |
4cdc7696 | 1651 | |
df406460 NC |
1652 | if (there_is_preceeding_non_skip_insn == 0) |
1653 | if (DEBUG_RELAX) | |
1654 | printf ("preceeding skip insn prevents deletion of" | |
1655 | " ret insn at addr 0x%x in section %s\n", | |
1656 | (int) dot + 2, sec->name); | |
1657 | } | |
1658 | else | |
1659 | { | |
1660 | /* There is no previous instruction. */ | |
1661 | there_is_preceeding_non_skip_insn = 0; | |
4cdc7696 | 1662 | } |
df406460 NC |
1663 | |
1664 | if (there_is_preceeding_non_skip_insn) | |
1665 | { | |
1666 | /* We now only have to make sure that there is no | |
1667 | local label defined at the address of the ret | |
1668 | instruction and that there is no local relocation | |
1669 | in this section pointing to the ret. */ | |
1670 | ||
1671 | int deleting_ret_is_safe = 1; | |
4cdc7696 | 1672 | unsigned int section_offset_of_ret_insn = |
df406460 NC |
1673 | irel->r_offset + insn_size; |
1674 | Elf_Internal_Sym *isym, *isymend; | |
1675 | unsigned int sec_shndx; | |
4cdc7696 NC |
1676 | |
1677 | sec_shndx = | |
1678 | _bfd_elf_section_from_bfd_section (abfd, sec); | |
df406460 NC |
1679 | |
1680 | /* Check for local symbols. */ | |
1681 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; | |
1682 | isymend = isym + symtab_hdr->sh_info; | |
1683 | for (; isym < isymend; isym++) | |
1684 | { | |
1685 | if (isym->st_value == section_offset_of_ret_insn | |
1686 | && isym->st_shndx == sec_shndx) | |
1687 | { | |
1688 | deleting_ret_is_safe = 0; | |
1689 | if (DEBUG_RELAX) | |
1690 | printf ("local label prevents deletion of ret " | |
1691 | "insn at address 0x%x\n", | |
1692 | (int) dot + insn_size); | |
1693 | } | |
1694 | } | |
1695 | ||
1696 | /* Now check for global symbols. */ | |
1697 | { | |
1698 | int symcount; | |
1699 | struct elf_link_hash_entry **sym_hashes; | |
1700 | struct elf_link_hash_entry **end_hashes; | |
1701 | ||
4cdc7696 | 1702 | symcount = (symtab_hdr->sh_size |
df406460 NC |
1703 | / sizeof (Elf32_External_Sym) |
1704 | - symtab_hdr->sh_info); | |
1705 | sym_hashes = elf_sym_hashes (abfd); | |
1706 | end_hashes = sym_hashes + symcount; | |
1707 | for (; sym_hashes < end_hashes; sym_hashes++) | |
1708 | { | |
4cdc7696 | 1709 | struct elf_link_hash_entry *sym_hash = |
df406460 NC |
1710 | *sym_hashes; |
1711 | if ((sym_hash->root.type == bfd_link_hash_defined | |
4cdc7696 NC |
1712 | || sym_hash->root.type == |
1713 | bfd_link_hash_defweak) | |
df406460 | 1714 | && sym_hash->root.u.def.section == sec |
4cdc7696 | 1715 | && sym_hash->root.u.def.value == section_offset_of_ret_insn) |
df406460 NC |
1716 | { |
1717 | deleting_ret_is_safe = 0; | |
1718 | if (DEBUG_RELAX) | |
1719 | printf ("global label prevents deletion of " | |
1720 | "ret insn at address 0x%x\n", | |
1721 | (int) dot + insn_size); | |
1722 | } | |
1723 | } | |
1724 | } | |
1725 | /* Now we check for relocations pointing to ret. */ | |
1726 | { | |
1727 | Elf_Internal_Rela *irel; | |
1728 | Elf_Internal_Rela *relend; | |
1729 | Elf_Internal_Shdr *symtab_hdr; | |
1730 | ||
4cdc7696 NC |
1731 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
1732 | relend = elf_section_data (sec)->relocs | |
df406460 NC |
1733 | + sec->reloc_count; |
1734 | ||
4cdc7696 | 1735 | for (irel = elf_section_data (sec)->relocs; |
df406460 NC |
1736 | irel < relend; irel++) |
1737 | { | |
1738 | bfd_vma reloc_target = 0; | |
1739 | bfd_vma symval; | |
1740 | Elf_Internal_Sym *isymbuf = NULL; | |
4cdc7696 NC |
1741 | |
1742 | /* Read this BFD's local symbols if we haven't | |
df406460 NC |
1743 | done so already. */ |
1744 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) | |
1745 | { | |
4cdc7696 | 1746 | isymbuf = (Elf_Internal_Sym *) |
df406460 NC |
1747 | symtab_hdr->contents; |
1748 | if (isymbuf == NULL) | |
4cdc7696 NC |
1749 | isymbuf = bfd_elf_get_elf_syms |
1750 | (abfd, | |
1751 | symtab_hdr, | |
1752 | symtab_hdr->sh_info, 0, | |
1753 | NULL, NULL, NULL); | |
df406460 NC |
1754 | if (isymbuf == NULL) |
1755 | break; | |
1756 | } | |
4cdc7696 NC |
1757 | |
1758 | /* Get the value of the symbol referred to | |
df406460 | 1759 | by the reloc. */ |
4cdc7696 | 1760 | if (ELF32_R_SYM (irel->r_info) |
df406460 NC |
1761 | < symtab_hdr->sh_info) |
1762 | { | |
1763 | /* A local symbol. */ | |
1764 | Elf_Internal_Sym *isym; | |
1765 | asection *sym_sec; | |
1766 | ||
4cdc7696 | 1767 | isym = isymbuf |
df406460 | 1768 | + ELF32_R_SYM (irel->r_info); |
4cdc7696 NC |
1769 | sym_sec = bfd_section_from_elf_index |
1770 | (abfd, isym->st_shndx); | |
1771 | symval = isym->st_value; | |
1772 | ||
1773 | /* If the reloc is absolute, it will not | |
df406460 NC |
1774 | have a symbol or section associated |
1775 | with it. */ | |
4cdc7696 | 1776 | |
df406460 | 1777 | if (sym_sec) |
4cdc7696 NC |
1778 | { |
1779 | symval += | |
df406460 NC |
1780 | sym_sec->output_section->vma |
1781 | + sym_sec->output_offset; | |
1782 | reloc_target = symval + irel->r_addend; | |
1783 | } | |
1784 | else | |
1785 | { | |
1786 | reloc_target = symval + irel->r_addend; | |
4cdc7696 | 1787 | /* Reference symbol is absolute. */ |
df406460 NC |
1788 | } |
1789 | } | |
4cdc7696 NC |
1790 | /* else ... reference symbol is extern. */ |
1791 | ||
df406460 | 1792 | if (address_of_ret == reloc_target) |
4cdc7696 | 1793 | { |
df406460 NC |
1794 | deleting_ret_is_safe = 0; |
1795 | if (DEBUG_RELAX) | |
1796 | printf ("ret from " | |
1797 | "rjmp/jmp ret sequence at address" | |
1798 | " 0x%x could not be deleted. ret" | |
1799 | " is target of a relocation.\n", | |
1800 | (int) address_of_ret); | |
1801 | } | |
1802 | } | |
1803 | } | |
1804 | ||
1805 | if (deleting_ret_is_safe) | |
1806 | { | |
1807 | if (DEBUG_RELAX) | |
1808 | printf ("unreachable ret instruction " | |
1809 | "at address 0x%x deleted.\n", | |
1810 | (int) dot + insn_size); | |
4cdc7696 | 1811 | |
df406460 NC |
1812 | /* Delete two bytes of data. */ |
1813 | if (!elf32_avr_relax_delete_bytes (abfd, sec, | |
1814 | irel->r_offset + insn_size, 2)) | |
1815 | goto error_return; | |
1816 | ||
4cdc7696 NC |
1817 | /* That will change things, so, we should relax |
1818 | again. Note that this is not required, and it | |
df406460 | 1819 | may be slow. */ |
df406460 NC |
1820 | *again = TRUE; |
1821 | break; | |
1822 | } | |
1823 | } | |
4cdc7696 NC |
1824 | |
1825 | } | |
1826 | } | |
df406460 NC |
1827 | break; |
1828 | } | |
1829 | } | |
1830 | } | |
1831 | ||
1832 | if (contents != NULL | |
1833 | && elf_section_data (sec)->this_hdr.contents != contents) | |
1834 | { | |
1835 | if (! link_info->keep_memory) | |
1836 | free (contents); | |
1837 | else | |
1838 | { | |
1839 | /* Cache the section contents for elf_link_input_bfd. */ | |
1840 | elf_section_data (sec)->this_hdr.contents = contents; | |
1841 | } | |
1842 | } | |
1843 | ||
1844 | if (internal_relocs != NULL | |
1845 | && elf_section_data (sec)->relocs != internal_relocs) | |
1846 | free (internal_relocs); | |
1847 | ||
1848 | return TRUE; | |
1849 | ||
1850 | error_return: | |
1851 | if (isymbuf != NULL | |
1852 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
1853 | free (isymbuf); | |
1854 | if (contents != NULL | |
1855 | && elf_section_data (sec)->this_hdr.contents != contents) | |
1856 | free (contents); | |
1857 | if (internal_relocs != NULL | |
1858 | && elf_section_data (sec)->relocs != internal_relocs) | |
1859 | free (internal_relocs); | |
1860 | ||
4cdc7696 | 1861 | return FALSE; |
df406460 NC |
1862 | } |
1863 | ||
1864 | /* This is a version of bfd_generic_get_relocated_section_contents | |
4cdc7696 | 1865 | which uses elf32_avr_relocate_section. |
df406460 | 1866 | |
4cdc7696 | 1867 | For avr it's essentially a cut and paste taken from the H8300 port. |
df406460 | 1868 | The author of the relaxation support patch for avr had absolutely no |
4cdc7696 | 1869 | clue what is happening here but found out that this part of the code |
df406460 NC |
1870 | seems to be important. */ |
1871 | ||
1872 | static bfd_byte * | |
1873 | elf32_avr_get_relocated_section_contents (bfd *output_bfd, | |
1874 | struct bfd_link_info *link_info, | |
1875 | struct bfd_link_order *link_order, | |
1876 | bfd_byte *data, | |
1877 | bfd_boolean relocatable, | |
1878 | asymbol **symbols) | |
1879 | { | |
1880 | Elf_Internal_Shdr *symtab_hdr; | |
1881 | asection *input_section = link_order->u.indirect.section; | |
1882 | bfd *input_bfd = input_section->owner; | |
1883 | asection **sections = NULL; | |
1884 | Elf_Internal_Rela *internal_relocs = NULL; | |
1885 | Elf_Internal_Sym *isymbuf = NULL; | |
1886 | ||
1887 | /* We only need to handle the case of relaxing, or of having a | |
1888 | particular set of section contents, specially. */ | |
1889 | if (relocatable | |
1890 | || elf_section_data (input_section)->this_hdr.contents == NULL) | |
1891 | return bfd_generic_get_relocated_section_contents (output_bfd, link_info, | |
1892 | link_order, data, | |
1893 | relocatable, | |
1894 | symbols); | |
1895 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
1896 | ||
1897 | memcpy (data, elf_section_data (input_section)->this_hdr.contents, | |
1898 | (size_t) input_section->size); | |
1899 | ||
1900 | if ((input_section->flags & SEC_RELOC) != 0 | |
1901 | && input_section->reloc_count > 0) | |
1902 | { | |
1903 | asection **secpp; | |
1904 | Elf_Internal_Sym *isym, *isymend; | |
1905 | bfd_size_type amt; | |
1906 | ||
1907 | internal_relocs = (_bfd_elf_link_read_relocs | |
4cdc7696 | 1908 | (input_bfd, input_section, NULL, NULL, FALSE)); |
df406460 NC |
1909 | if (internal_relocs == NULL) |
1910 | goto error_return; | |
1911 | ||
1912 | if (symtab_hdr->sh_info != 0) | |
1913 | { | |
1914 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
1915 | if (isymbuf == NULL) | |
1916 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, | |
1917 | symtab_hdr->sh_info, 0, | |
1918 | NULL, NULL, NULL); | |
1919 | if (isymbuf == NULL) | |
1920 | goto error_return; | |
1921 | } | |
1922 | ||
1923 | amt = symtab_hdr->sh_info; | |
1924 | amt *= sizeof (asection *); | |
4cdc7696 | 1925 | sections = bfd_malloc (amt); |
df406460 NC |
1926 | if (sections == NULL && amt != 0) |
1927 | goto error_return; | |
1928 | ||
1929 | isymend = isymbuf + symtab_hdr->sh_info; | |
1930 | for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp) | |
1931 | { | |
1932 | asection *isec; | |
1933 | ||
1934 | if (isym->st_shndx == SHN_UNDEF) | |
1935 | isec = bfd_und_section_ptr; | |
1936 | else if (isym->st_shndx == SHN_ABS) | |
1937 | isec = bfd_abs_section_ptr; | |
1938 | else if (isym->st_shndx == SHN_COMMON) | |
1939 | isec = bfd_com_section_ptr; | |
1940 | else | |
1941 | isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx); | |
1942 | ||
1943 | *secpp = isec; | |
1944 | } | |
1945 | ||
1946 | if (! elf32_avr_relocate_section (output_bfd, link_info, input_bfd, | |
1947 | input_section, data, internal_relocs, | |
1948 | isymbuf, sections)) | |
1949 | goto error_return; | |
1950 | ||
1951 | if (sections != NULL) | |
1952 | free (sections); | |
1953 | if (isymbuf != NULL | |
1954 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
1955 | free (isymbuf); | |
1956 | if (elf_section_data (input_section)->relocs != internal_relocs) | |
1957 | free (internal_relocs); | |
1958 | } | |
1959 | ||
1960 | return data; | |
1961 | ||
1962 | error_return: | |
1963 | if (sections != NULL) | |
1964 | free (sections); | |
1965 | if (isymbuf != NULL | |
1966 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
1967 | free (isymbuf); | |
1968 | if (internal_relocs != NULL | |
1969 | && elf_section_data (input_section)->relocs != internal_relocs) | |
1970 | free (internal_relocs); | |
1971 | return NULL; | |
1972 | } | |
1973 | ||
1974 | ||
adde6300 AM |
1975 | #define ELF_ARCH bfd_arch_avr |
1976 | #define ELF_MACHINE_CODE EM_AVR | |
aa4f99bb | 1977 | #define ELF_MACHINE_ALT1 EM_AVR_OLD |
adde6300 AM |
1978 | #define ELF_MAXPAGESIZE 1 |
1979 | ||
1980 | #define TARGET_LITTLE_SYM bfd_elf32_avr_vec | |
1981 | #define TARGET_LITTLE_NAME "elf32-avr" | |
1982 | ||
1983 | #define elf_info_to_howto avr_info_to_howto_rela | |
1984 | #define elf_info_to_howto_rel NULL | |
1985 | #define elf_backend_relocate_section elf32_avr_relocate_section | |
1986 | #define elf_backend_gc_mark_hook elf32_avr_gc_mark_hook | |
1987 | #define elf_backend_gc_sweep_hook elf32_avr_gc_sweep_hook | |
1988 | #define elf_backend_check_relocs elf32_avr_check_relocs | |
1989 | #define elf_backend_can_gc_sections 1 | |
f0fe0e16 | 1990 | #define elf_backend_rela_normal 1 |
adde6300 AM |
1991 | #define elf_backend_final_write_processing \ |
1992 | bfd_elf_avr_final_write_processing | |
1993 | #define elf_backend_object_p elf32_avr_object_p | |
1994 | ||
df406460 NC |
1995 | #define bfd_elf32_bfd_relax_section elf32_avr_relax_section |
1996 | #define bfd_elf32_bfd_get_relocated_section_contents \ | |
1997 | elf32_avr_get_relocated_section_contents | |
1998 | ||
adde6300 | 1999 | #include "elf32-target.h" |