Commit | Line | Data |
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adde6300 | 1 | /* AVR-specific support for 32-bit ELF |
4b95cf5c | 2 | Copyright (C) 1999-2014 Free Software Foundation, Inc. |
adde6300 AM |
3 | Contributed by Denis Chertykov <denisc@overta.ru> |
4 | ||
750bce0e | 5 | This file is part of BFD, the Binary File Descriptor library. |
adde6300 | 6 | |
750bce0e NC |
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 |
750bce0e | 10 | (at your option) any later version. |
adde6300 | 11 | |
750bce0e NC |
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. | |
adde6300 | 16 | |
750bce0e NC |
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 | |
4cdc7696 | 19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, |
df406460 | 20 | Boston, MA 02110-1301, USA. */ |
adde6300 | 21 | |
adde6300 | 22 | #include "sysdep.h" |
3db64b00 | 23 | #include "bfd.h" |
adde6300 AM |
24 | #include "libbfd.h" |
25 | #include "elf-bfd.h" | |
26 | #include "elf/avr.h" | |
28c9d252 NC |
27 | #include "elf32-avr.h" |
28 | ||
29 | /* Enable debugging printout at stdout with this variable. */ | |
30 | static bfd_boolean debug_relax = FALSE; | |
31 | ||
32 | /* Enable debugging printout at stdout with this variable. */ | |
33 | static bfd_boolean debug_stubs = FALSE; | |
34 | ||
35 | /* Hash table initialization and handling. Code is taken from the hppa port | |
36 | and adapted to the needs of AVR. */ | |
37 | ||
38 | /* We use two hash tables to hold information for linking avr objects. | |
39 | ||
4dfe6ac6 | 40 | The first is the elf32_avr_link_hash_table which is derived from the |
28c9d252 NC |
41 | stanard ELF linker hash table. We use this as a place to attach the other |
42 | hash table and some static information. | |
43 | ||
44 | The second is the stub hash table which is derived from the base BFD | |
45 | hash table. The stub hash table holds the information on the linker | |
46 | stubs. */ | |
47 | ||
48 | struct elf32_avr_stub_hash_entry | |
49 | { | |
50 | /* Base hash table entry structure. */ | |
51 | struct bfd_hash_entry bh_root; | |
52 | ||
53 | /* Offset within stub_sec of the beginning of this stub. */ | |
54 | bfd_vma stub_offset; | |
55 | ||
56 | /* Given the symbol's value and its section we can determine its final | |
57 | value when building the stubs (so the stub knows where to jump). */ | |
58 | bfd_vma target_value; | |
59 | ||
60 | /* This way we could mark stubs to be no longer necessary. */ | |
61 | bfd_boolean is_actually_needed; | |
62 | }; | |
63 | ||
64 | struct elf32_avr_link_hash_table | |
65 | { | |
66 | /* The main hash table. */ | |
67 | struct elf_link_hash_table etab; | |
68 | ||
69 | /* The stub hash table. */ | |
70 | struct bfd_hash_table bstab; | |
71 | ||
72 | bfd_boolean no_stubs; | |
73 | ||
74 | /* Linker stub bfd. */ | |
75 | bfd *stub_bfd; | |
76 | ||
77 | /* The stub section. */ | |
78 | asection *stub_sec; | |
79 | ||
80 | /* Usually 0, unless we are generating code for a bootloader. Will | |
81 | be initialized by elf32_avr_size_stubs to the vma offset of the | |
82 | output section associated with the stub section. */ | |
83 | bfd_vma vector_base; | |
84 | ||
85 | /* Assorted information used by elf32_avr_size_stubs. */ | |
86 | unsigned int bfd_count; | |
87 | int top_index; | |
88 | asection ** input_list; | |
89 | Elf_Internal_Sym ** all_local_syms; | |
90 | ||
91 | /* Tables for mapping vma beyond the 128k boundary to the address of the | |
92 | corresponding stub. (AMT) | |
93 | "amt_max_entry_cnt" reflects the number of entries that memory is allocated | |
94 | for in the "amt_stub_offsets" and "amt_destination_addr" arrays. | |
95 | "amt_entry_cnt" informs how many of these entries actually contain | |
96 | useful data. */ | |
97 | unsigned int amt_entry_cnt; | |
98 | unsigned int amt_max_entry_cnt; | |
99 | bfd_vma * amt_stub_offsets; | |
100 | bfd_vma * amt_destination_addr; | |
101 | }; | |
102 | ||
103 | /* Various hash macros and functions. */ | |
104 | #define avr_link_hash_table(p) \ | |
64ee10b6 | 105 | /* PR 3874: Check that we have an AVR style hash table before using it. */\ |
4dfe6ac6 NC |
106 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
107 | == AVR_ELF_DATA ? ((struct elf32_avr_link_hash_table *) ((p)->hash)) : NULL) | |
28c9d252 NC |
108 | |
109 | #define avr_stub_hash_entry(ent) \ | |
110 | ((struct elf32_avr_stub_hash_entry *)(ent)) | |
111 | ||
112 | #define avr_stub_hash_lookup(table, string, create, copy) \ | |
113 | ((struct elf32_avr_stub_hash_entry *) \ | |
114 | bfd_hash_lookup ((table), (string), (create), (copy))) | |
adde6300 | 115 | |
adde6300 AM |
116 | static reloc_howto_type elf_avr_howto_table[] = |
117 | { | |
118 | HOWTO (R_AVR_NONE, /* type */ | |
119 | 0, /* rightshift */ | |
120 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
121 | 32, /* bitsize */ | |
b34976b6 | 122 | FALSE, /* pc_relative */ |
adde6300 AM |
123 | 0, /* bitpos */ |
124 | complain_overflow_bitfield, /* complain_on_overflow */ | |
125 | bfd_elf_generic_reloc, /* special_function */ | |
126 | "R_AVR_NONE", /* name */ | |
b34976b6 | 127 | FALSE, /* partial_inplace */ |
adde6300 AM |
128 | 0, /* src_mask */ |
129 | 0, /* dst_mask */ | |
b34976b6 | 130 | FALSE), /* pcrel_offset */ |
adde6300 AM |
131 | |
132 | HOWTO (R_AVR_32, /* type */ | |
133 | 0, /* rightshift */ | |
134 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
135 | 32, /* bitsize */ | |
b34976b6 | 136 | FALSE, /* pc_relative */ |
adde6300 AM |
137 | 0, /* bitpos */ |
138 | complain_overflow_bitfield, /* complain_on_overflow */ | |
139 | bfd_elf_generic_reloc, /* special_function */ | |
140 | "R_AVR_32", /* name */ | |
b34976b6 | 141 | FALSE, /* partial_inplace */ |
adde6300 AM |
142 | 0xffffffff, /* src_mask */ |
143 | 0xffffffff, /* dst_mask */ | |
b34976b6 | 144 | FALSE), /* pcrel_offset */ |
adde6300 AM |
145 | |
146 | /* A 7 bit PC relative relocation. */ | |
147 | HOWTO (R_AVR_7_PCREL, /* type */ | |
148 | 1, /* rightshift */ | |
149 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
150 | 7, /* bitsize */ | |
b34976b6 | 151 | TRUE, /* pc_relative */ |
adde6300 AM |
152 | 3, /* bitpos */ |
153 | complain_overflow_bitfield, /* complain_on_overflow */ | |
154 | bfd_elf_generic_reloc, /* special_function */ | |
155 | "R_AVR_7_PCREL", /* name */ | |
b34976b6 | 156 | FALSE, /* partial_inplace */ |
adde6300 AM |
157 | 0xffff, /* src_mask */ |
158 | 0xffff, /* dst_mask */ | |
b34976b6 | 159 | TRUE), /* pcrel_offset */ |
adde6300 AM |
160 | |
161 | /* A 13 bit PC relative relocation. */ | |
162 | HOWTO (R_AVR_13_PCREL, /* type */ | |
163 | 1, /* rightshift */ | |
164 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
165 | 13, /* bitsize */ | |
b34976b6 | 166 | TRUE, /* pc_relative */ |
adde6300 AM |
167 | 0, /* bitpos */ |
168 | complain_overflow_bitfield, /* complain_on_overflow */ | |
169 | bfd_elf_generic_reloc, /* special_function */ | |
170 | "R_AVR_13_PCREL", /* name */ | |
b34976b6 | 171 | FALSE, /* partial_inplace */ |
adde6300 AM |
172 | 0xfff, /* src_mask */ |
173 | 0xfff, /* dst_mask */ | |
b34976b6 | 174 | TRUE), /* pcrel_offset */ |
adde6300 AM |
175 | |
176 | /* A 16 bit absolute relocation. */ | |
177 | HOWTO (R_AVR_16, /* type */ | |
178 | 0, /* rightshift */ | |
179 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
180 | 16, /* bitsize */ | |
b34976b6 | 181 | FALSE, /* pc_relative */ |
adde6300 AM |
182 | 0, /* bitpos */ |
183 | complain_overflow_dont, /* complain_on_overflow */ | |
184 | bfd_elf_generic_reloc, /* special_function */ | |
185 | "R_AVR_16", /* name */ | |
b34976b6 | 186 | FALSE, /* partial_inplace */ |
adde6300 AM |
187 | 0xffff, /* src_mask */ |
188 | 0xffff, /* dst_mask */ | |
b34976b6 | 189 | FALSE), /* pcrel_offset */ |
adde6300 | 190 | |
28c9d252 NC |
191 | /* A 16 bit absolute relocation for command address |
192 | Will be changed when linker stubs are needed. */ | |
adde6300 AM |
193 | HOWTO (R_AVR_16_PM, /* type */ |
194 | 1, /* rightshift */ | |
195 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
196 | 16, /* bitsize */ | |
b34976b6 | 197 | FALSE, /* pc_relative */ |
adde6300 AM |
198 | 0, /* bitpos */ |
199 | complain_overflow_bitfield, /* complain_on_overflow */ | |
200 | bfd_elf_generic_reloc, /* special_function */ | |
201 | "R_AVR_16_PM", /* name */ | |
b34976b6 | 202 | FALSE, /* partial_inplace */ |
adde6300 AM |
203 | 0xffff, /* src_mask */ |
204 | 0xffff, /* dst_mask */ | |
b34976b6 | 205 | FALSE), /* pcrel_offset */ |
adde6300 AM |
206 | /* A low 8 bit absolute relocation of 16 bit address. |
207 | For LDI command. */ | |
208 | HOWTO (R_AVR_LO8_LDI, /* type */ | |
209 | 0, /* rightshift */ | |
210 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
211 | 8, /* bitsize */ | |
b34976b6 | 212 | FALSE, /* pc_relative */ |
adde6300 AM |
213 | 0, /* bitpos */ |
214 | complain_overflow_dont, /* complain_on_overflow */ | |
215 | bfd_elf_generic_reloc, /* special_function */ | |
216 | "R_AVR_LO8_LDI", /* name */ | |
b34976b6 | 217 | FALSE, /* partial_inplace */ |
adde6300 AM |
218 | 0xffff, /* src_mask */ |
219 | 0xffff, /* dst_mask */ | |
b34976b6 | 220 | FALSE), /* pcrel_offset */ |
adde6300 AM |
221 | /* A high 8 bit absolute relocation of 16 bit address. |
222 | For LDI command. */ | |
223 | HOWTO (R_AVR_HI8_LDI, /* type */ | |
224 | 8, /* rightshift */ | |
225 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
226 | 8, /* bitsize */ | |
b34976b6 | 227 | FALSE, /* pc_relative */ |
adde6300 AM |
228 | 0, /* bitpos */ |
229 | complain_overflow_dont, /* complain_on_overflow */ | |
230 | bfd_elf_generic_reloc, /* special_function */ | |
231 | "R_AVR_HI8_LDI", /* name */ | |
b34976b6 | 232 | FALSE, /* partial_inplace */ |
adde6300 AM |
233 | 0xffff, /* src_mask */ |
234 | 0xffff, /* dst_mask */ | |
b34976b6 | 235 | FALSE), /* pcrel_offset */ |
adde6300 | 236 | /* A high 6 bit absolute relocation of 22 bit address. |
4cdc7696 | 237 | For LDI command. As well second most significant 8 bit value of |
df406460 | 238 | a 32 bit link-time constant. */ |
adde6300 AM |
239 | HOWTO (R_AVR_HH8_LDI, /* type */ |
240 | 16, /* rightshift */ | |
241 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
242 | 8, /* bitsize */ | |
b34976b6 | 243 | FALSE, /* pc_relative */ |
adde6300 AM |
244 | 0, /* bitpos */ |
245 | complain_overflow_dont, /* complain_on_overflow */ | |
246 | bfd_elf_generic_reloc, /* special_function */ | |
247 | "R_AVR_HH8_LDI", /* name */ | |
b34976b6 | 248 | FALSE, /* partial_inplace */ |
adde6300 AM |
249 | 0xffff, /* src_mask */ |
250 | 0xffff, /* dst_mask */ | |
b34976b6 | 251 | FALSE), /* pcrel_offset */ |
adde6300 AM |
252 | /* A negative low 8 bit absolute relocation of 16 bit address. |
253 | For LDI command. */ | |
254 | HOWTO (R_AVR_LO8_LDI_NEG, /* type */ | |
255 | 0, /* rightshift */ | |
256 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
257 | 8, /* bitsize */ | |
b34976b6 | 258 | FALSE, /* pc_relative */ |
adde6300 AM |
259 | 0, /* bitpos */ |
260 | complain_overflow_dont, /* complain_on_overflow */ | |
261 | bfd_elf_generic_reloc, /* special_function */ | |
262 | "R_AVR_LO8_LDI_NEG", /* name */ | |
b34976b6 | 263 | FALSE, /* partial_inplace */ |
adde6300 AM |
264 | 0xffff, /* src_mask */ |
265 | 0xffff, /* dst_mask */ | |
b34976b6 | 266 | FALSE), /* pcrel_offset */ |
df406460 | 267 | /* A negative high 8 bit absolute relocation of 16 bit address. |
adde6300 AM |
268 | For LDI command. */ |
269 | HOWTO (R_AVR_HI8_LDI_NEG, /* type */ | |
270 | 8, /* rightshift */ | |
271 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
272 | 8, /* bitsize */ | |
b34976b6 | 273 | FALSE, /* pc_relative */ |
adde6300 AM |
274 | 0, /* bitpos */ |
275 | complain_overflow_dont, /* complain_on_overflow */ | |
276 | bfd_elf_generic_reloc, /* special_function */ | |
277 | "R_AVR_HI8_LDI_NEG", /* name */ | |
b34976b6 | 278 | FALSE, /* partial_inplace */ |
adde6300 AM |
279 | 0xffff, /* src_mask */ |
280 | 0xffff, /* dst_mask */ | |
b34976b6 | 281 | FALSE), /* pcrel_offset */ |
df406460 | 282 | /* A negative high 6 bit absolute relocation of 22 bit address. |
adde6300 AM |
283 | For LDI command. */ |
284 | HOWTO (R_AVR_HH8_LDI_NEG, /* type */ | |
285 | 16, /* rightshift */ | |
286 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
287 | 8, /* bitsize */ | |
b34976b6 | 288 | FALSE, /* pc_relative */ |
adde6300 AM |
289 | 0, /* bitpos */ |
290 | complain_overflow_dont, /* complain_on_overflow */ | |
291 | bfd_elf_generic_reloc, /* special_function */ | |
292 | "R_AVR_HH8_LDI_NEG", /* name */ | |
b34976b6 | 293 | FALSE, /* partial_inplace */ |
adde6300 AM |
294 | 0xffff, /* src_mask */ |
295 | 0xffff, /* dst_mask */ | |
b34976b6 | 296 | FALSE), /* pcrel_offset */ |
adde6300 | 297 | /* A low 8 bit absolute relocation of 24 bit program memory address. |
28c9d252 | 298 | For LDI command. Will not be changed when linker stubs are needed. */ |
adde6300 AM |
299 | HOWTO (R_AVR_LO8_LDI_PM, /* type */ |
300 | 1, /* rightshift */ | |
301 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
302 | 8, /* bitsize */ | |
b34976b6 | 303 | FALSE, /* pc_relative */ |
adde6300 AM |
304 | 0, /* bitpos */ |
305 | complain_overflow_dont, /* complain_on_overflow */ | |
306 | bfd_elf_generic_reloc, /* special_function */ | |
307 | "R_AVR_LO8_LDI_PM", /* name */ | |
b34976b6 | 308 | FALSE, /* partial_inplace */ |
adde6300 AM |
309 | 0xffff, /* src_mask */ |
310 | 0xffff, /* dst_mask */ | |
b34976b6 | 311 | FALSE), /* pcrel_offset */ |
28c9d252 NC |
312 | /* A low 8 bit absolute relocation of 24 bit program memory address. |
313 | For LDI command. Will not be changed when linker stubs are needed. */ | |
adde6300 AM |
314 | HOWTO (R_AVR_HI8_LDI_PM, /* type */ |
315 | 9, /* rightshift */ | |
316 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
317 | 8, /* bitsize */ | |
b34976b6 | 318 | FALSE, /* pc_relative */ |
adde6300 AM |
319 | 0, /* bitpos */ |
320 | complain_overflow_dont, /* complain_on_overflow */ | |
321 | bfd_elf_generic_reloc, /* special_function */ | |
322 | "R_AVR_HI8_LDI_PM", /* name */ | |
b34976b6 | 323 | FALSE, /* partial_inplace */ |
adde6300 AM |
324 | 0xffff, /* src_mask */ |
325 | 0xffff, /* dst_mask */ | |
b34976b6 | 326 | FALSE), /* pcrel_offset */ |
28c9d252 NC |
327 | /* A low 8 bit absolute relocation of 24 bit program memory address. |
328 | For LDI command. Will not be changed when linker stubs are needed. */ | |
adde6300 AM |
329 | HOWTO (R_AVR_HH8_LDI_PM, /* type */ |
330 | 17, /* rightshift */ | |
331 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
332 | 8, /* bitsize */ | |
b34976b6 | 333 | FALSE, /* pc_relative */ |
adde6300 AM |
334 | 0, /* bitpos */ |
335 | complain_overflow_dont, /* complain_on_overflow */ | |
336 | bfd_elf_generic_reloc, /* special_function */ | |
337 | "R_AVR_HH8_LDI_PM", /* name */ | |
b34976b6 | 338 | FALSE, /* partial_inplace */ |
adde6300 AM |
339 | 0xffff, /* src_mask */ |
340 | 0xffff, /* dst_mask */ | |
b34976b6 | 341 | FALSE), /* pcrel_offset */ |
28c9d252 NC |
342 | /* A low 8 bit absolute relocation of 24 bit program memory address. |
343 | For LDI command. Will not be changed when linker stubs are needed. */ | |
adde6300 AM |
344 | HOWTO (R_AVR_LO8_LDI_PM_NEG, /* type */ |
345 | 1, /* rightshift */ | |
346 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
347 | 8, /* bitsize */ | |
b34976b6 | 348 | FALSE, /* pc_relative */ |
adde6300 AM |
349 | 0, /* bitpos */ |
350 | complain_overflow_dont, /* complain_on_overflow */ | |
351 | bfd_elf_generic_reloc, /* special_function */ | |
352 | "R_AVR_LO8_LDI_PM_NEG", /* name */ | |
b34976b6 | 353 | FALSE, /* partial_inplace */ |
adde6300 AM |
354 | 0xffff, /* src_mask */ |
355 | 0xffff, /* dst_mask */ | |
b34976b6 | 356 | FALSE), /* pcrel_offset */ |
28c9d252 NC |
357 | /* A low 8 bit absolute relocation of 24 bit program memory address. |
358 | For LDI command. Will not be changed when linker stubs are needed. */ | |
adde6300 AM |
359 | HOWTO (R_AVR_HI8_LDI_PM_NEG, /* type */ |
360 | 9, /* rightshift */ | |
361 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
362 | 8, /* bitsize */ | |
b34976b6 | 363 | FALSE, /* pc_relative */ |
adde6300 AM |
364 | 0, /* bitpos */ |
365 | complain_overflow_dont, /* complain_on_overflow */ | |
366 | bfd_elf_generic_reloc, /* special_function */ | |
367 | "R_AVR_HI8_LDI_PM_NEG", /* name */ | |
b34976b6 | 368 | FALSE, /* partial_inplace */ |
adde6300 AM |
369 | 0xffff, /* src_mask */ |
370 | 0xffff, /* dst_mask */ | |
b34976b6 | 371 | FALSE), /* pcrel_offset */ |
28c9d252 NC |
372 | /* A low 8 bit absolute relocation of 24 bit program memory address. |
373 | For LDI command. Will not be changed when linker stubs are needed. */ | |
adde6300 AM |
374 | HOWTO (R_AVR_HH8_LDI_PM_NEG, /* type */ |
375 | 17, /* rightshift */ | |
376 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
377 | 8, /* bitsize */ | |
b34976b6 | 378 | FALSE, /* pc_relative */ |
adde6300 AM |
379 | 0, /* bitpos */ |
380 | complain_overflow_dont, /* complain_on_overflow */ | |
381 | bfd_elf_generic_reloc, /* special_function */ | |
382 | "R_AVR_HH8_LDI_PM_NEG", /* name */ | |
b34976b6 | 383 | FALSE, /* partial_inplace */ |
adde6300 AM |
384 | 0xffff, /* src_mask */ |
385 | 0xffff, /* dst_mask */ | |
b34976b6 | 386 | FALSE), /* pcrel_offset */ |
adde6300 AM |
387 | /* Relocation for CALL command in ATmega. */ |
388 | HOWTO (R_AVR_CALL, /* type */ | |
389 | 1, /* rightshift */ | |
390 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
391 | 23, /* bitsize */ | |
b34976b6 | 392 | FALSE, /* pc_relative */ |
adde6300 | 393 | 0, /* bitpos */ |
750bce0e | 394 | complain_overflow_dont,/* complain_on_overflow */ |
adde6300 AM |
395 | bfd_elf_generic_reloc, /* special_function */ |
396 | "R_AVR_CALL", /* name */ | |
b34976b6 | 397 | FALSE, /* partial_inplace */ |
adde6300 AM |
398 | 0xffffffff, /* src_mask */ |
399 | 0xffffffff, /* dst_mask */ | |
750bce0e NC |
400 | FALSE), /* pcrel_offset */ |
401 | /* A 16 bit absolute relocation of 16 bit address. | |
402 | For LDI command. */ | |
403 | HOWTO (R_AVR_LDI, /* type */ | |
404 | 0, /* rightshift */ | |
405 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
406 | 16, /* bitsize */ | |
407 | FALSE, /* pc_relative */ | |
408 | 0, /* bitpos */ | |
409 | complain_overflow_dont,/* complain_on_overflow */ | |
410 | bfd_elf_generic_reloc, /* special_function */ | |
411 | "R_AVR_LDI", /* name */ | |
412 | FALSE, /* partial_inplace */ | |
413 | 0xffff, /* src_mask */ | |
414 | 0xffff, /* dst_mask */ | |
415 | FALSE), /* pcrel_offset */ | |
416 | /* A 6 bit absolute relocation of 6 bit offset. | |
417 | For ldd/sdd command. */ | |
418 | HOWTO (R_AVR_6, /* type */ | |
419 | 0, /* rightshift */ | |
420 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
421 | 6, /* bitsize */ | |
422 | FALSE, /* pc_relative */ | |
423 | 0, /* bitpos */ | |
424 | complain_overflow_dont,/* complain_on_overflow */ | |
425 | bfd_elf_generic_reloc, /* special_function */ | |
426 | "R_AVR_6", /* name */ | |
427 | FALSE, /* partial_inplace */ | |
428 | 0xffff, /* src_mask */ | |
429 | 0xffff, /* dst_mask */ | |
430 | FALSE), /* pcrel_offset */ | |
431 | /* A 6 bit absolute relocation of 6 bit offset. | |
432 | For sbiw/adiw command. */ | |
433 | HOWTO (R_AVR_6_ADIW, /* type */ | |
434 | 0, /* rightshift */ | |
435 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
436 | 6, /* bitsize */ | |
437 | FALSE, /* pc_relative */ | |
438 | 0, /* bitpos */ | |
439 | complain_overflow_dont,/* complain_on_overflow */ | |
440 | bfd_elf_generic_reloc, /* special_function */ | |
441 | "R_AVR_6_ADIW", /* name */ | |
442 | FALSE, /* partial_inplace */ | |
443 | 0xffff, /* src_mask */ | |
444 | 0xffff, /* dst_mask */ | |
df406460 NC |
445 | FALSE), /* pcrel_offset */ |
446 | /* Most significant 8 bit value of a 32 bit link-time constant. */ | |
447 | HOWTO (R_AVR_MS8_LDI, /* type */ | |
448 | 24, /* rightshift */ | |
449 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
450 | 8, /* bitsize */ | |
451 | FALSE, /* pc_relative */ | |
452 | 0, /* bitpos */ | |
453 | complain_overflow_dont, /* complain_on_overflow */ | |
454 | bfd_elf_generic_reloc, /* special_function */ | |
455 | "R_AVR_MS8_LDI", /* name */ | |
456 | FALSE, /* partial_inplace */ | |
457 | 0xffff, /* src_mask */ | |
458 | 0xffff, /* dst_mask */ | |
459 | FALSE), /* pcrel_offset */ | |
460 | /* Negative most significant 8 bit value of a 32 bit link-time constant. */ | |
461 | HOWTO (R_AVR_MS8_LDI_NEG, /* type */ | |
462 | 24, /* rightshift */ | |
463 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
464 | 8, /* bitsize */ | |
465 | FALSE, /* pc_relative */ | |
466 | 0, /* bitpos */ | |
467 | complain_overflow_dont, /* complain_on_overflow */ | |
468 | bfd_elf_generic_reloc, /* special_function */ | |
469 | "R_AVR_MS8_LDI_NEG", /* name */ | |
470 | FALSE, /* partial_inplace */ | |
471 | 0xffff, /* src_mask */ | |
472 | 0xffff, /* dst_mask */ | |
28c9d252 NC |
473 | FALSE), /* pcrel_offset */ |
474 | /* A low 8 bit absolute relocation of 24 bit program memory address. | |
17e57237 | 475 | For LDI command. Will be changed when linker stubs are needed. */ |
28c9d252 NC |
476 | HOWTO (R_AVR_LO8_LDI_GS, /* type */ |
477 | 1, /* rightshift */ | |
478 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
479 | 8, /* bitsize */ | |
480 | FALSE, /* pc_relative */ | |
481 | 0, /* bitpos */ | |
482 | complain_overflow_dont, /* complain_on_overflow */ | |
483 | bfd_elf_generic_reloc, /* special_function */ | |
484 | "R_AVR_LO8_LDI_GS", /* name */ | |
485 | FALSE, /* partial_inplace */ | |
486 | 0xffff, /* src_mask */ | |
487 | 0xffff, /* dst_mask */ | |
488 | FALSE), /* pcrel_offset */ | |
489 | /* A low 8 bit absolute relocation of 24 bit program memory address. | |
17e57237 | 490 | For LDI command. Will be changed when linker stubs are needed. */ |
28c9d252 NC |
491 | HOWTO (R_AVR_HI8_LDI_GS, /* type */ |
492 | 9, /* rightshift */ | |
493 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
494 | 8, /* bitsize */ | |
495 | FALSE, /* pc_relative */ | |
496 | 0, /* bitpos */ | |
497 | complain_overflow_dont, /* complain_on_overflow */ | |
498 | bfd_elf_generic_reloc, /* special_function */ | |
499 | "R_AVR_HI8_LDI_GS", /* name */ | |
500 | FALSE, /* partial_inplace */ | |
501 | 0xffff, /* src_mask */ | |
502 | 0xffff, /* dst_mask */ | |
17e57237 NC |
503 | FALSE), /* pcrel_offset */ |
504 | /* 8 bit offset. */ | |
505 | HOWTO (R_AVR_8, /* type */ | |
506 | 0, /* rightshift */ | |
507 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
508 | 8, /* bitsize */ | |
509 | FALSE, /* pc_relative */ | |
510 | 0, /* bitpos */ | |
511 | complain_overflow_bitfield,/* complain_on_overflow */ | |
512 | bfd_elf_generic_reloc, /* special_function */ | |
513 | "R_AVR_8", /* name */ | |
514 | FALSE, /* partial_inplace */ | |
515 | 0x000000ff, /* src_mask */ | |
516 | 0x000000ff, /* dst_mask */ | |
517 | FALSE), /* pcrel_offset */ | |
99700d6f NC |
518 | /* lo8-part to use in .byte lo8(sym). */ |
519 | HOWTO (R_AVR_8_LO8, /* type */ | |
520 | 0, /* rightshift */ | |
521 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
522 | 8, /* bitsize */ | |
523 | FALSE, /* pc_relative */ | |
524 | 0, /* bitpos */ | |
525 | complain_overflow_dont,/* complain_on_overflow */ | |
526 | bfd_elf_generic_reloc, /* special_function */ | |
527 | "R_AVR_8_LO8", /* name */ | |
528 | FALSE, /* partial_inplace */ | |
529 | 0xffffff, /* src_mask */ | |
530 | 0xffffff, /* dst_mask */ | |
531 | FALSE), /* pcrel_offset */ | |
532 | /* hi8-part to use in .byte hi8(sym). */ | |
533 | HOWTO (R_AVR_8_HI8, /* type */ | |
534 | 8, /* rightshift */ | |
535 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
536 | 8, /* bitsize */ | |
537 | FALSE, /* pc_relative */ | |
538 | 0, /* bitpos */ | |
539 | complain_overflow_dont,/* complain_on_overflow */ | |
540 | bfd_elf_generic_reloc, /* special_function */ | |
541 | "R_AVR_8_HI8", /* name */ | |
542 | FALSE, /* partial_inplace */ | |
543 | 0xffffff, /* src_mask */ | |
544 | 0xffffff, /* dst_mask */ | |
545 | FALSE), /* pcrel_offset */ | |
40551fb8 NC |
546 | /* hlo8-part to use in .byte hlo8(sym). */ |
547 | HOWTO (R_AVR_8_HLO8, /* type */ | |
99700d6f NC |
548 | 16, /* rightshift */ |
549 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
550 | 8, /* bitsize */ | |
551 | FALSE, /* pc_relative */ | |
552 | 0, /* bitpos */ | |
553 | complain_overflow_dont,/* complain_on_overflow */ | |
554 | bfd_elf_generic_reloc, /* special_function */ | |
40551fb8 | 555 | "R_AVR_8_HLO8", /* name */ |
99700d6f NC |
556 | FALSE, /* partial_inplace */ |
557 | 0xffffff, /* src_mask */ | |
558 | 0xffffff, /* dst_mask */ | |
559 | FALSE), /* pcrel_offset */ | |
adde6300 AM |
560 | }; |
561 | ||
562 | /* Map BFD reloc types to AVR ELF reloc types. */ | |
563 | ||
564 | struct avr_reloc_map | |
565 | { | |
566 | bfd_reloc_code_real_type bfd_reloc_val; | |
567 | unsigned int elf_reloc_val; | |
568 | }; | |
569 | ||
28c9d252 | 570 | static const struct avr_reloc_map avr_reloc_map[] = |
adde6300 AM |
571 | { |
572 | { BFD_RELOC_NONE, R_AVR_NONE }, | |
573 | { BFD_RELOC_32, R_AVR_32 }, | |
574 | { BFD_RELOC_AVR_7_PCREL, R_AVR_7_PCREL }, | |
575 | { BFD_RELOC_AVR_13_PCREL, R_AVR_13_PCREL }, | |
576 | { BFD_RELOC_16, R_AVR_16 }, | |
577 | { BFD_RELOC_AVR_16_PM, R_AVR_16_PM }, | |
578 | { BFD_RELOC_AVR_LO8_LDI, R_AVR_LO8_LDI}, | |
579 | { BFD_RELOC_AVR_HI8_LDI, R_AVR_HI8_LDI }, | |
580 | { BFD_RELOC_AVR_HH8_LDI, R_AVR_HH8_LDI }, | |
df406460 | 581 | { BFD_RELOC_AVR_MS8_LDI, R_AVR_MS8_LDI }, |
adde6300 AM |
582 | { BFD_RELOC_AVR_LO8_LDI_NEG, R_AVR_LO8_LDI_NEG }, |
583 | { BFD_RELOC_AVR_HI8_LDI_NEG, R_AVR_HI8_LDI_NEG }, | |
584 | { BFD_RELOC_AVR_HH8_LDI_NEG, R_AVR_HH8_LDI_NEG }, | |
df406460 | 585 | { BFD_RELOC_AVR_MS8_LDI_NEG, R_AVR_MS8_LDI_NEG }, |
adde6300 | 586 | { BFD_RELOC_AVR_LO8_LDI_PM, R_AVR_LO8_LDI_PM }, |
28c9d252 | 587 | { BFD_RELOC_AVR_LO8_LDI_GS, R_AVR_LO8_LDI_GS }, |
adde6300 | 588 | { BFD_RELOC_AVR_HI8_LDI_PM, R_AVR_HI8_LDI_PM }, |
28c9d252 | 589 | { BFD_RELOC_AVR_HI8_LDI_GS, R_AVR_HI8_LDI_GS }, |
adde6300 AM |
590 | { BFD_RELOC_AVR_HH8_LDI_PM, R_AVR_HH8_LDI_PM }, |
591 | { BFD_RELOC_AVR_LO8_LDI_PM_NEG, R_AVR_LO8_LDI_PM_NEG }, | |
592 | { BFD_RELOC_AVR_HI8_LDI_PM_NEG, R_AVR_HI8_LDI_PM_NEG }, | |
593 | { BFD_RELOC_AVR_HH8_LDI_PM_NEG, R_AVR_HH8_LDI_PM_NEG }, | |
750bce0e NC |
594 | { BFD_RELOC_AVR_CALL, R_AVR_CALL }, |
595 | { BFD_RELOC_AVR_LDI, R_AVR_LDI }, | |
596 | { BFD_RELOC_AVR_6, R_AVR_6 }, | |
17e57237 | 597 | { BFD_RELOC_AVR_6_ADIW, R_AVR_6_ADIW }, |
99700d6f NC |
598 | { BFD_RELOC_8, R_AVR_8 }, |
599 | { BFD_RELOC_AVR_8_LO, R_AVR_8_LO8 }, | |
600 | { BFD_RELOC_AVR_8_HI, R_AVR_8_HI8 }, | |
40551fb8 | 601 | { BFD_RELOC_AVR_8_HLO, R_AVR_8_HLO8 } |
adde6300 AM |
602 | }; |
603 | ||
df406460 | 604 | /* Meant to be filled one day with the wrap around address for the |
4cdc7696 | 605 | specific device. I.e. should get the value 0x4000 for 16k devices, |
df406460 | 606 | 0x8000 for 32k devices and so on. |
4cdc7696 | 607 | |
df406460 | 608 | We initialize it here with a value of 0x1000000 resulting in |
4cdc7696 NC |
609 | that we will never suggest a wrap-around jump during relaxation. |
610 | The logic of the source code later on assumes that in | |
df406460 | 611 | avr_pc_wrap_around one single bit is set. */ |
28c9d252 NC |
612 | static bfd_vma avr_pc_wrap_around = 0x10000000; |
613 | ||
614 | /* If this variable holds a value different from zero, the linker relaxation | |
615 | machine will try to optimize call/ret sequences by a single jump | |
616 | instruction. This option could be switched off by a linker switch. */ | |
617 | static int avr_replace_call_ret_sequences = 1; | |
618 | \f | |
619 | /* Initialize an entry in the stub hash table. */ | |
620 | ||
621 | static struct bfd_hash_entry * | |
622 | stub_hash_newfunc (struct bfd_hash_entry *entry, | |
623 | struct bfd_hash_table *table, | |
624 | const char *string) | |
625 | { | |
626 | /* Allocate the structure if it has not already been allocated by a | |
627 | subclass. */ | |
628 | if (entry == NULL) | |
629 | { | |
630 | entry = bfd_hash_allocate (table, | |
631 | sizeof (struct elf32_avr_stub_hash_entry)); | |
632 | if (entry == NULL) | |
633 | return entry; | |
634 | } | |
635 | ||
636 | /* Call the allocation method of the superclass. */ | |
637 | entry = bfd_hash_newfunc (entry, table, string); | |
638 | if (entry != NULL) | |
639 | { | |
640 | struct elf32_avr_stub_hash_entry *hsh; | |
641 | ||
642 | /* Initialize the local fields. */ | |
643 | hsh = avr_stub_hash_entry (entry); | |
644 | hsh->stub_offset = 0; | |
645 | hsh->target_value = 0; | |
646 | } | |
647 | ||
648 | return entry; | |
649 | } | |
650 | ||
64ee10b6 NC |
651 | /* This function is just a straight passthrough to the real |
652 | function in linker.c. Its prupose is so that its address | |
653 | can be compared inside the avr_link_hash_table macro. */ | |
654 | ||
655 | static struct bfd_hash_entry * | |
656 | elf32_avr_link_hash_newfunc (struct bfd_hash_entry * entry, | |
657 | struct bfd_hash_table * table, | |
658 | const char * string) | |
659 | { | |
660 | return _bfd_elf_link_hash_newfunc (entry, table, string); | |
661 | } | |
662 | ||
28c9d252 NC |
663 | /* Create the derived linker hash table. The AVR ELF port uses the derived |
664 | hash table to keep information specific to the AVR ELF linker (without | |
665 | using static variables). */ | |
666 | ||
667 | static struct bfd_link_hash_table * | |
668 | elf32_avr_link_hash_table_create (bfd *abfd) | |
669 | { | |
670 | struct elf32_avr_link_hash_table *htab; | |
671 | bfd_size_type amt = sizeof (*htab); | |
672 | ||
7bf52ea2 | 673 | htab = bfd_zmalloc (amt); |
28c9d252 NC |
674 | if (htab == NULL) |
675 | return NULL; | |
676 | ||
677 | if (!_bfd_elf_link_hash_table_init (&htab->etab, abfd, | |
64ee10b6 | 678 | elf32_avr_link_hash_newfunc, |
4dfe6ac6 NC |
679 | sizeof (struct elf_link_hash_entry), |
680 | AVR_ELF_DATA)) | |
28c9d252 NC |
681 | { |
682 | free (htab); | |
683 | return NULL; | |
684 | } | |
685 | ||
686 | /* Init the stub hash table too. */ | |
687 | if (!bfd_hash_table_init (&htab->bstab, stub_hash_newfunc, | |
688 | sizeof (struct elf32_avr_stub_hash_entry))) | |
689 | return NULL; | |
4cdc7696 | 690 | |
28c9d252 NC |
691 | return &htab->etab.root; |
692 | } | |
693 | ||
694 | /* Free the derived linker hash table. */ | |
695 | ||
696 | static void | |
697 | elf32_avr_link_hash_table_free (struct bfd_link_hash_table *btab) | |
698 | { | |
699 | struct elf32_avr_link_hash_table *htab | |
700 | = (struct elf32_avr_link_hash_table *) btab; | |
701 | ||
702 | /* Free the address mapping table. */ | |
703 | if (htab->amt_stub_offsets != NULL) | |
704 | free (htab->amt_stub_offsets); | |
705 | if (htab->amt_destination_addr != NULL) | |
706 | free (htab->amt_destination_addr); | |
707 | ||
708 | bfd_hash_table_free (&htab->bstab); | |
9f7c3e5e | 709 | _bfd_elf_link_hash_table_free (btab); |
28c9d252 | 710 | } |
df406460 NC |
711 | |
712 | /* Calculates the effective distance of a pc relative jump/call. */ | |
73160847 | 713 | |
df406460 NC |
714 | static int |
715 | avr_relative_distance_considering_wrap_around (unsigned int distance) | |
4cdc7696 | 716 | { |
df406460 | 717 | unsigned int wrap_around_mask = avr_pc_wrap_around - 1; |
df406460 NC |
718 | int dist_with_wrap_around = distance & wrap_around_mask; |
719 | ||
4cdc7696 | 720 | if (dist_with_wrap_around > ((int) (avr_pc_wrap_around >> 1))) |
df406460 NC |
721 | dist_with_wrap_around -= avr_pc_wrap_around; |
722 | ||
723 | return dist_with_wrap_around; | |
724 | } | |
725 | ||
726 | ||
adde6300 | 727 | static reloc_howto_type * |
4cdc7696 NC |
728 | bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
729 | bfd_reloc_code_real_type code) | |
adde6300 AM |
730 | { |
731 | unsigned int i; | |
732 | ||
733 | for (i = 0; | |
734 | i < sizeof (avr_reloc_map) / sizeof (struct avr_reloc_map); | |
735 | i++) | |
73160847 NC |
736 | if (avr_reloc_map[i].bfd_reloc_val == code) |
737 | return &elf_avr_howto_table[avr_reloc_map[i].elf_reloc_val]; | |
adde6300 AM |
738 | |
739 | return NULL; | |
740 | } | |
741 | ||
157090f7 AM |
742 | static reloc_howto_type * |
743 | bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
744 | const char *r_name) | |
745 | { | |
746 | unsigned int i; | |
747 | ||
748 | for (i = 0; | |
749 | i < sizeof (elf_avr_howto_table) / sizeof (elf_avr_howto_table[0]); | |
750 | i++) | |
751 | if (elf_avr_howto_table[i].name != NULL | |
752 | && strcasecmp (elf_avr_howto_table[i].name, r_name) == 0) | |
753 | return &elf_avr_howto_table[i]; | |
754 | ||
755 | return NULL; | |
756 | } | |
757 | ||
adde6300 AM |
758 | /* Set the howto pointer for an AVR ELF reloc. */ |
759 | ||
760 | static void | |
4cdc7696 NC |
761 | avr_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED, |
762 | arelent *cache_ptr, | |
763 | Elf_Internal_Rela *dst) | |
adde6300 AM |
764 | { |
765 | unsigned int r_type; | |
766 | ||
767 | r_type = ELF32_R_TYPE (dst->r_info); | |
768 | BFD_ASSERT (r_type < (unsigned int) R_AVR_max); | |
769 | cache_ptr->howto = &elf_avr_howto_table[r_type]; | |
770 | } | |
771 | ||
28c9d252 NC |
772 | static bfd_boolean |
773 | avr_stub_is_required_for_16_bit_reloc (bfd_vma relocation) | |
774 | { | |
775 | return (relocation >= 0x020000); | |
776 | } | |
777 | ||
778 | /* Returns the address of the corresponding stub if there is one. | |
779 | Returns otherwise an address above 0x020000. This function | |
780 | could also be used, if there is no knowledge on the section where | |
781 | the destination is found. */ | |
782 | ||
783 | static bfd_vma | |
784 | avr_get_stub_addr (bfd_vma srel, | |
785 | struct elf32_avr_link_hash_table *htab) | |
786 | { | |
91d6fa6a | 787 | unsigned int sindex; |
28c9d252 NC |
788 | bfd_vma stub_sec_addr = |
789 | (htab->stub_sec->output_section->vma + | |
790 | htab->stub_sec->output_offset); | |
791 | ||
91d6fa6a NC |
792 | for (sindex = 0; sindex < htab->amt_max_entry_cnt; sindex ++) |
793 | if (htab->amt_destination_addr[sindex] == srel) | |
794 | return htab->amt_stub_offsets[sindex] + stub_sec_addr; | |
28c9d252 NC |
795 | |
796 | /* Return an address that could not be reached by 16 bit relocs. */ | |
797 | return 0x020000; | |
798 | } | |
799 | ||
adde6300 AM |
800 | /* Perform a single relocation. By default we use the standard BFD |
801 | routines, but a few relocs, we have to do them ourselves. */ | |
802 | ||
803 | static bfd_reloc_status_type | |
28c9d252 NC |
804 | avr_final_link_relocate (reloc_howto_type * howto, |
805 | bfd * input_bfd, | |
806 | asection * input_section, | |
807 | bfd_byte * contents, | |
808 | Elf_Internal_Rela * rel, | |
809 | bfd_vma relocation, | |
810 | struct elf32_avr_link_hash_table * htab) | |
adde6300 AM |
811 | { |
812 | bfd_reloc_status_type r = bfd_reloc_ok; | |
813 | bfd_vma x; | |
814 | bfd_signed_vma srel; | |
28c9d252 NC |
815 | bfd_signed_vma reloc_addr; |
816 | bfd_boolean use_stubs = FALSE; | |
817 | /* Usually is 0, unless we are generating code for a bootloader. */ | |
818 | bfd_signed_vma base_addr = htab->vector_base; | |
819 | ||
820 | /* Absolute addr of the reloc in the final excecutable. */ | |
821 | reloc_addr = rel->r_offset + input_section->output_section->vma | |
822 | + input_section->output_offset; | |
adde6300 AM |
823 | |
824 | switch (howto->type) | |
825 | { | |
826 | case R_AVR_7_PCREL: | |
827 | contents += rel->r_offset; | |
828 | srel = (bfd_signed_vma) relocation; | |
829 | srel += rel->r_addend; | |
830 | srel -= rel->r_offset; | |
a7c10850 | 831 | srel -= 2; /* Branch instructions add 2 to the PC... */ |
adde6300 AM |
832 | srel -= (input_section->output_section->vma + |
833 | input_section->output_offset); | |
834 | ||
835 | if (srel & 1) | |
836 | return bfd_reloc_outofrange; | |
837 | if (srel > ((1 << 7) - 1) || (srel < - (1 << 7))) | |
838 | return bfd_reloc_overflow; | |
839 | x = bfd_get_16 (input_bfd, contents); | |
840 | x = (x & 0xfc07) | (((srel >> 1) << 3) & 0x3f8); | |
841 | bfd_put_16 (input_bfd, x, contents); | |
842 | break; | |
843 | ||
844 | case R_AVR_13_PCREL: | |
845 | contents += rel->r_offset; | |
846 | srel = (bfd_signed_vma) relocation; | |
847 | srel += rel->r_addend; | |
848 | srel -= rel->r_offset; | |
a7c10850 | 849 | srel -= 2; /* Branch instructions add 2 to the PC... */ |
adde6300 AM |
850 | srel -= (input_section->output_section->vma + |
851 | input_section->output_offset); | |
852 | ||
853 | if (srel & 1) | |
854 | return bfd_reloc_outofrange; | |
855 | ||
df406460 NC |
856 | srel = avr_relative_distance_considering_wrap_around (srel); |
857 | ||
adde6300 AM |
858 | /* AVR addresses commands as words. */ |
859 | srel >>= 1; | |
860 | ||
861 | /* Check for overflow. */ | |
862 | if (srel < -2048 || srel > 2047) | |
863 | { | |
df406460 NC |
864 | /* Relative distance is too large. */ |
865 | ||
654c3c9f | 866 | /* Always apply WRAPAROUND for avr2, avr25, and avr4. */ |
65aa24b6 | 867 | switch (bfd_get_mach (input_bfd)) |
adde6300 | 868 | { |
65aa24b6 | 869 | case bfd_mach_avr2: |
654c3c9f | 870 | case bfd_mach_avr25: |
65aa24b6 NC |
871 | case bfd_mach_avr4: |
872 | break; | |
873 | ||
874 | default: | |
875 | return bfd_reloc_overflow; | |
adde6300 | 876 | } |
adde6300 AM |
877 | } |
878 | ||
879 | x = bfd_get_16 (input_bfd, contents); | |
880 | x = (x & 0xf000) | (srel & 0xfff); | |
881 | bfd_put_16 (input_bfd, x, contents); | |
882 | break; | |
883 | ||
884 | case R_AVR_LO8_LDI: | |
885 | contents += rel->r_offset; | |
886 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
887 | x = bfd_get_16 (input_bfd, contents); | |
888 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
889 | bfd_put_16 (input_bfd, x, contents); | |
890 | break; | |
891 | ||
750bce0e NC |
892 | case R_AVR_LDI: |
893 | contents += rel->r_offset; | |
894 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
4cdc7696 NC |
895 | if (((srel > 0) && (srel & 0xffff) > 255) |
896 | || ((srel < 0) && ((-srel) & 0xffff) > 128)) | |
df406460 NC |
897 | /* Remove offset for data/eeprom section. */ |
898 | return bfd_reloc_overflow; | |
899 | ||
750bce0e NC |
900 | x = bfd_get_16 (input_bfd, contents); |
901 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
902 | bfd_put_16 (input_bfd, x, contents); | |
903 | break; | |
904 | ||
905 | case R_AVR_6: | |
906 | contents += rel->r_offset; | |
907 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
908 | if (((srel & 0xffff) > 63) || (srel < 0)) | |
909 | /* Remove offset for data/eeprom section. */ | |
910 | return bfd_reloc_overflow; | |
911 | x = bfd_get_16 (input_bfd, contents); | |
4cdc7696 | 912 | x = (x & 0xd3f8) | ((srel & 7) | ((srel & (3 << 3)) << 7) |
df406460 | 913 | | ((srel & (1 << 5)) << 8)); |
750bce0e NC |
914 | bfd_put_16 (input_bfd, x, contents); |
915 | break; | |
916 | ||
917 | case R_AVR_6_ADIW: | |
918 | contents += rel->r_offset; | |
919 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
920 | if (((srel & 0xffff) > 63) || (srel < 0)) | |
921 | /* Remove offset for data/eeprom section. */ | |
922 | return bfd_reloc_overflow; | |
923 | x = bfd_get_16 (input_bfd, contents); | |
4cdc7696 | 924 | x = (x & 0xff30) | (srel & 0xf) | ((srel & 0x30) << 2); |
750bce0e NC |
925 | bfd_put_16 (input_bfd, x, contents); |
926 | break; | |
927 | ||
adde6300 AM |
928 | case R_AVR_HI8_LDI: |
929 | contents += rel->r_offset; | |
930 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
931 | srel = (srel >> 8) & 0xff; | |
932 | x = bfd_get_16 (input_bfd, contents); | |
933 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
934 | bfd_put_16 (input_bfd, x, contents); | |
935 | break; | |
936 | ||
937 | case R_AVR_HH8_LDI: | |
938 | contents += rel->r_offset; | |
939 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
940 | srel = (srel >> 16) & 0xff; | |
941 | x = bfd_get_16 (input_bfd, contents); | |
942 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
943 | bfd_put_16 (input_bfd, x, contents); | |
944 | break; | |
945 | ||
df406460 NC |
946 | case R_AVR_MS8_LDI: |
947 | contents += rel->r_offset; | |
948 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
949 | srel = (srel >> 24) & 0xff; | |
950 | x = bfd_get_16 (input_bfd, contents); | |
951 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
952 | bfd_put_16 (input_bfd, x, contents); | |
953 | break; | |
954 | ||
adde6300 AM |
955 | case R_AVR_LO8_LDI_NEG: |
956 | contents += rel->r_offset; | |
957 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
958 | srel = -srel; | |
959 | x = bfd_get_16 (input_bfd, contents); | |
960 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
961 | bfd_put_16 (input_bfd, x, contents); | |
962 | break; | |
963 | ||
964 | case R_AVR_HI8_LDI_NEG: | |
965 | contents += rel->r_offset; | |
966 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
967 | srel = -srel; | |
968 | srel = (srel >> 8) & 0xff; | |
969 | x = bfd_get_16 (input_bfd, contents); | |
970 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
971 | bfd_put_16 (input_bfd, x, contents); | |
972 | break; | |
973 | ||
974 | case R_AVR_HH8_LDI_NEG: | |
975 | contents += rel->r_offset; | |
976 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
977 | srel = -srel; | |
978 | srel = (srel >> 16) & 0xff; | |
979 | x = bfd_get_16 (input_bfd, contents); | |
980 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
981 | bfd_put_16 (input_bfd, x, contents); | |
982 | break; | |
983 | ||
df406460 NC |
984 | case R_AVR_MS8_LDI_NEG: |
985 | contents += rel->r_offset; | |
986 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
987 | srel = -srel; | |
988 | srel = (srel >> 24) & 0xff; | |
989 | x = bfd_get_16 (input_bfd, contents); | |
990 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
991 | bfd_put_16 (input_bfd, x, contents); | |
992 | break; | |
993 | ||
28c9d252 NC |
994 | case R_AVR_LO8_LDI_GS: |
995 | use_stubs = (!htab->no_stubs); | |
996 | /* Fall through. */ | |
adde6300 AM |
997 | case R_AVR_LO8_LDI_PM: |
998 | contents += rel->r_offset; | |
999 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
28c9d252 NC |
1000 | |
1001 | if (use_stubs | |
1002 | && avr_stub_is_required_for_16_bit_reloc (srel - base_addr)) | |
1003 | { | |
1004 | bfd_vma old_srel = srel; | |
1005 | ||
1006 | /* We need to use the address of the stub instead. */ | |
1007 | srel = avr_get_stub_addr (srel, htab); | |
1008 | if (debug_stubs) | |
1009 | printf ("LD: Using jump stub (at 0x%x) with destination 0x%x for " | |
1010 | "reloc at address 0x%x.\n", | |
1011 | (unsigned int) srel, | |
1012 | (unsigned int) old_srel, | |
1013 | (unsigned int) reloc_addr); | |
1014 | ||
1015 | if (avr_stub_is_required_for_16_bit_reloc (srel - base_addr)) | |
1016 | return bfd_reloc_outofrange; | |
1017 | } | |
1018 | ||
adde6300 AM |
1019 | if (srel & 1) |
1020 | return bfd_reloc_outofrange; | |
1021 | srel = srel >> 1; | |
1022 | x = bfd_get_16 (input_bfd, contents); | |
1023 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
1024 | bfd_put_16 (input_bfd, x, contents); | |
1025 | break; | |
1026 | ||
28c9d252 NC |
1027 | case R_AVR_HI8_LDI_GS: |
1028 | use_stubs = (!htab->no_stubs); | |
1029 | /* Fall through. */ | |
adde6300 AM |
1030 | case R_AVR_HI8_LDI_PM: |
1031 | contents += rel->r_offset; | |
1032 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
28c9d252 NC |
1033 | |
1034 | if (use_stubs | |
1035 | && avr_stub_is_required_for_16_bit_reloc (srel - base_addr)) | |
1036 | { | |
1037 | bfd_vma old_srel = srel; | |
1038 | ||
1039 | /* We need to use the address of the stub instead. */ | |
1040 | srel = avr_get_stub_addr (srel, htab); | |
1041 | if (debug_stubs) | |
1042 | printf ("LD: Using jump stub (at 0x%x) with destination 0x%x for " | |
1043 | "reloc at address 0x%x.\n", | |
1044 | (unsigned int) srel, | |
1045 | (unsigned int) old_srel, | |
1046 | (unsigned int) reloc_addr); | |
1047 | ||
1048 | if (avr_stub_is_required_for_16_bit_reloc (srel - base_addr)) | |
1049 | return bfd_reloc_outofrange; | |
1050 | } | |
1051 | ||
adde6300 AM |
1052 | if (srel & 1) |
1053 | return bfd_reloc_outofrange; | |
1054 | srel = srel >> 1; | |
1055 | srel = (srel >> 8) & 0xff; | |
1056 | x = bfd_get_16 (input_bfd, contents); | |
1057 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
1058 | bfd_put_16 (input_bfd, x, contents); | |
1059 | break; | |
1060 | ||
1061 | case R_AVR_HH8_LDI_PM: | |
1062 | contents += rel->r_offset; | |
1063 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
1064 | if (srel & 1) | |
1065 | return bfd_reloc_outofrange; | |
1066 | srel = srel >> 1; | |
1067 | srel = (srel >> 16) & 0xff; | |
1068 | x = bfd_get_16 (input_bfd, contents); | |
1069 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
1070 | bfd_put_16 (input_bfd, x, contents); | |
1071 | break; | |
1072 | ||
1073 | case R_AVR_LO8_LDI_PM_NEG: | |
1074 | contents += rel->r_offset; | |
1075 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
1076 | srel = -srel; | |
1077 | if (srel & 1) | |
1078 | return bfd_reloc_outofrange; | |
1079 | srel = srel >> 1; | |
1080 | x = bfd_get_16 (input_bfd, contents); | |
1081 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
1082 | bfd_put_16 (input_bfd, x, contents); | |
1083 | break; | |
1084 | ||
1085 | case R_AVR_HI8_LDI_PM_NEG: | |
1086 | contents += rel->r_offset; | |
1087 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
1088 | srel = -srel; | |
1089 | if (srel & 1) | |
1090 | return bfd_reloc_outofrange; | |
1091 | srel = srel >> 1; | |
1092 | srel = (srel >> 8) & 0xff; | |
1093 | x = bfd_get_16 (input_bfd, contents); | |
1094 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
1095 | bfd_put_16 (input_bfd, x, contents); | |
1096 | break; | |
1097 | ||
1098 | case R_AVR_HH8_LDI_PM_NEG: | |
1099 | contents += rel->r_offset; | |
1100 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
1101 | srel = -srel; | |
1102 | if (srel & 1) | |
1103 | return bfd_reloc_outofrange; | |
1104 | srel = srel >> 1; | |
1105 | srel = (srel >> 16) & 0xff; | |
1106 | x = bfd_get_16 (input_bfd, contents); | |
1107 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
1108 | bfd_put_16 (input_bfd, x, contents); | |
1109 | break; | |
1110 | ||
1111 | case R_AVR_CALL: | |
1112 | contents += rel->r_offset; | |
1113 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
1114 | if (srel & 1) | |
1115 | return bfd_reloc_outofrange; | |
1116 | srel = srel >> 1; | |
1117 | x = bfd_get_16 (input_bfd, contents); | |
1118 | x |= ((srel & 0x10000) | ((srel << 3) & 0x1f00000)) >> 16; | |
1119 | bfd_put_16 (input_bfd, x, contents); | |
dc810e39 | 1120 | bfd_put_16 (input_bfd, (bfd_vma) srel & 0xffff, contents+2); |
adde6300 AM |
1121 | break; |
1122 | ||
28c9d252 NC |
1123 | case R_AVR_16_PM: |
1124 | use_stubs = (!htab->no_stubs); | |
1125 | contents += rel->r_offset; | |
1126 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
1127 | ||
1128 | if (use_stubs | |
1129 | && avr_stub_is_required_for_16_bit_reloc (srel - base_addr)) | |
1130 | { | |
1131 | bfd_vma old_srel = srel; | |
1132 | ||
1133 | /* We need to use the address of the stub instead. */ | |
1134 | srel = avr_get_stub_addr (srel,htab); | |
1135 | if (debug_stubs) | |
1136 | printf ("LD: Using jump stub (at 0x%x) with destination 0x%x for " | |
1137 | "reloc at address 0x%x.\n", | |
1138 | (unsigned int) srel, | |
1139 | (unsigned int) old_srel, | |
1140 | (unsigned int) reloc_addr); | |
1141 | ||
1142 | if (avr_stub_is_required_for_16_bit_reloc (srel - base_addr)) | |
1143 | return bfd_reloc_outofrange; | |
1144 | } | |
1145 | ||
1146 | if (srel & 1) | |
1147 | return bfd_reloc_outofrange; | |
1148 | srel = srel >> 1; | |
1149 | bfd_put_16 (input_bfd, (bfd_vma) srel &0x00ffff, contents); | |
1150 | break; | |
1151 | ||
adde6300 AM |
1152 | default: |
1153 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1154 | contents, rel->r_offset, | |
1155 | relocation, rel->r_addend); | |
1156 | } | |
1157 | ||
1158 | return r; | |
1159 | } | |
1160 | ||
1161 | /* Relocate an AVR ELF section. */ | |
4cdc7696 | 1162 | |
b34976b6 | 1163 | static bfd_boolean |
4cdc7696 NC |
1164 | elf32_avr_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED, |
1165 | struct bfd_link_info *info, | |
1166 | bfd *input_bfd, | |
1167 | asection *input_section, | |
1168 | bfd_byte *contents, | |
1169 | Elf_Internal_Rela *relocs, | |
1170 | Elf_Internal_Sym *local_syms, | |
1171 | asection **local_sections) | |
adde6300 AM |
1172 | { |
1173 | Elf_Internal_Shdr * symtab_hdr; | |
1174 | struct elf_link_hash_entry ** sym_hashes; | |
1175 | Elf_Internal_Rela * rel; | |
1176 | Elf_Internal_Rela * relend; | |
28c9d252 | 1177 | struct elf32_avr_link_hash_table * htab = avr_link_hash_table (info); |
adde6300 | 1178 | |
4dfe6ac6 NC |
1179 | if (htab == NULL) |
1180 | return FALSE; | |
1181 | ||
adde6300 AM |
1182 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
1183 | sym_hashes = elf_sym_hashes (input_bfd); | |
1184 | relend = relocs + input_section->reloc_count; | |
1185 | ||
1186 | for (rel = relocs; rel < relend; rel ++) | |
1187 | { | |
1188 | reloc_howto_type * howto; | |
1189 | unsigned long r_symndx; | |
1190 | Elf_Internal_Sym * sym; | |
1191 | asection * sec; | |
1192 | struct elf_link_hash_entry * h; | |
1193 | bfd_vma relocation; | |
1194 | bfd_reloc_status_type r; | |
dfeffb9f | 1195 | const char * name; |
adde6300 AM |
1196 | int r_type; |
1197 | ||
1198 | r_type = ELF32_R_TYPE (rel->r_info); | |
1199 | r_symndx = ELF32_R_SYM (rel->r_info); | |
c7e2358a | 1200 | howto = elf_avr_howto_table + r_type; |
adde6300 AM |
1201 | h = NULL; |
1202 | sym = NULL; | |
1203 | sec = NULL; | |
1204 | ||
1205 | if (r_symndx < symtab_hdr->sh_info) | |
1206 | { | |
1207 | sym = local_syms + r_symndx; | |
1208 | sec = local_sections [r_symndx]; | |
8517fae7 | 1209 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
adde6300 AM |
1210 | |
1211 | name = bfd_elf_string_from_elf_section | |
1212 | (input_bfd, symtab_hdr->sh_link, sym->st_name); | |
1213 | name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; | |
1214 | } | |
1215 | else | |
1216 | { | |
62d887d4 | 1217 | bfd_boolean unresolved_reloc, warned, ignored; |
adde6300 | 1218 | |
b2a8e766 AM |
1219 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
1220 | r_symndx, symtab_hdr, sym_hashes, | |
1221 | h, sec, relocation, | |
62d887d4 | 1222 | unresolved_reloc, warned, ignored); |
dfeffb9f L |
1223 | |
1224 | name = h->root.root.string; | |
adde6300 AM |
1225 | } |
1226 | ||
dbaa2011 | 1227 | if (sec != NULL && discarded_section (sec)) |
e4067dbb | 1228 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
545fd46b | 1229 | rel, 1, relend, howto, 0, contents); |
ab96bf03 AM |
1230 | |
1231 | if (info->relocatable) | |
1232 | continue; | |
1233 | ||
adde6300 | 1234 | r = avr_final_link_relocate (howto, input_bfd, input_section, |
28c9d252 | 1235 | contents, rel, relocation, htab); |
adde6300 AM |
1236 | |
1237 | if (r != bfd_reloc_ok) | |
1238 | { | |
1239 | const char * msg = (const char *) NULL; | |
1240 | ||
1241 | switch (r) | |
1242 | { | |
1243 | case bfd_reloc_overflow: | |
1244 | r = info->callbacks->reloc_overflow | |
dfeffb9f L |
1245 | (info, (h ? &h->root : NULL), |
1246 | name, howto->name, (bfd_vma) 0, | |
adde6300 AM |
1247 | input_bfd, input_section, rel->r_offset); |
1248 | break; | |
1249 | ||
1250 | case bfd_reloc_undefined: | |
1251 | r = info->callbacks->undefined_symbol | |
b34976b6 | 1252 | (info, name, input_bfd, input_section, rel->r_offset, TRUE); |
adde6300 AM |
1253 | break; |
1254 | ||
1255 | case bfd_reloc_outofrange: | |
1256 | msg = _("internal error: out of range error"); | |
1257 | break; | |
1258 | ||
1259 | case bfd_reloc_notsupported: | |
1260 | msg = _("internal error: unsupported relocation error"); | |
1261 | break; | |
1262 | ||
1263 | case bfd_reloc_dangerous: | |
1264 | msg = _("internal error: dangerous relocation"); | |
1265 | break; | |
1266 | ||
1267 | default: | |
1268 | msg = _("internal error: unknown error"); | |
1269 | break; | |
1270 | } | |
1271 | ||
1272 | if (msg) | |
1273 | r = info->callbacks->warning | |
1274 | (info, msg, name, input_bfd, input_section, rel->r_offset); | |
1275 | ||
1276 | if (! r) | |
b34976b6 | 1277 | return FALSE; |
adde6300 AM |
1278 | } |
1279 | } | |
1280 | ||
b34976b6 | 1281 | return TRUE; |
adde6300 AM |
1282 | } |
1283 | ||
1284 | /* The final processing done just before writing out a AVR ELF object | |
1285 | file. This gets the AVR architecture right based on the machine | |
1286 | number. */ | |
1287 | ||
1288 | static void | |
4cdc7696 NC |
1289 | bfd_elf_avr_final_write_processing (bfd *abfd, |
1290 | bfd_boolean linker ATTRIBUTE_UNUSED) | |
adde6300 AM |
1291 | { |
1292 | unsigned long val; | |
1293 | ||
1294 | switch (bfd_get_mach (abfd)) | |
1295 | { | |
1296 | default: | |
1297 | case bfd_mach_avr2: | |
1298 | val = E_AVR_MACH_AVR2; | |
1299 | break; | |
1300 | ||
1301 | case bfd_mach_avr1: | |
1302 | val = E_AVR_MACH_AVR1; | |
1303 | break; | |
1304 | ||
7b21ac3f EW |
1305 | case bfd_mach_avr25: |
1306 | val = E_AVR_MACH_AVR25; | |
28b02751 | 1307 | break; |
7b21ac3f | 1308 | |
adde6300 AM |
1309 | case bfd_mach_avr3: |
1310 | val = E_AVR_MACH_AVR3; | |
1311 | break; | |
1312 | ||
7b21ac3f EW |
1313 | case bfd_mach_avr31: |
1314 | val = E_AVR_MACH_AVR31; | |
28b02751 | 1315 | break; |
7b21ac3f EW |
1316 | |
1317 | case bfd_mach_avr35: | |
1318 | val = E_AVR_MACH_AVR35; | |
28b02751 | 1319 | break; |
7b21ac3f | 1320 | |
adde6300 AM |
1321 | case bfd_mach_avr4: |
1322 | val = E_AVR_MACH_AVR4; | |
1323 | break; | |
1324 | ||
65aa24b6 NC |
1325 | case bfd_mach_avr5: |
1326 | val = E_AVR_MACH_AVR5; | |
1327 | break; | |
28c9d252 | 1328 | |
7b21ac3f EW |
1329 | case bfd_mach_avr51: |
1330 | val = E_AVR_MACH_AVR51; | |
1331 | break; | |
1332 | ||
28c9d252 NC |
1333 | case bfd_mach_avr6: |
1334 | val = E_AVR_MACH_AVR6; | |
1335 | break; | |
8cc66334 EW |
1336 | |
1337 | case bfd_mach_avrxmega1: | |
1338 | val = E_AVR_MACH_XMEGA1; | |
1339 | break; | |
1340 | ||
1341 | case bfd_mach_avrxmega2: | |
1342 | val = E_AVR_MACH_XMEGA2; | |
1343 | break; | |
1344 | ||
1345 | case bfd_mach_avrxmega3: | |
1346 | val = E_AVR_MACH_XMEGA3; | |
1347 | break; | |
1348 | ||
1349 | case bfd_mach_avrxmega4: | |
1350 | val = E_AVR_MACH_XMEGA4; | |
1351 | break; | |
1352 | ||
1353 | case bfd_mach_avrxmega5: | |
1354 | val = E_AVR_MACH_XMEGA5; | |
1355 | break; | |
1356 | ||
1357 | case bfd_mach_avrxmega6: | |
1358 | val = E_AVR_MACH_XMEGA6; | |
1359 | break; | |
1360 | ||
1361 | case bfd_mach_avrxmega7: | |
1362 | val = E_AVR_MACH_XMEGA7; | |
1363 | break; | |
adde6300 AM |
1364 | } |
1365 | ||
1366 | elf_elfheader (abfd)->e_machine = EM_AVR; | |
1367 | elf_elfheader (abfd)->e_flags &= ~ EF_AVR_MACH; | |
1368 | elf_elfheader (abfd)->e_flags |= val; | |
df406460 | 1369 | elf_elfheader (abfd)->e_flags |= EF_AVR_LINKRELAX_PREPARED; |
adde6300 AM |
1370 | } |
1371 | ||
1372 | /* Set the right machine number. */ | |
1373 | ||
b34976b6 | 1374 | static bfd_boolean |
4cdc7696 | 1375 | elf32_avr_object_p (bfd *abfd) |
adde6300 | 1376 | { |
dc810e39 | 1377 | unsigned int e_set = bfd_mach_avr2; |
4cdc7696 | 1378 | |
aa4f99bb AO |
1379 | if (elf_elfheader (abfd)->e_machine == EM_AVR |
1380 | || elf_elfheader (abfd)->e_machine == EM_AVR_OLD) | |
adde6300 AM |
1381 | { |
1382 | int e_mach = elf_elfheader (abfd)->e_flags & EF_AVR_MACH; | |
4cdc7696 | 1383 | |
adde6300 AM |
1384 | switch (e_mach) |
1385 | { | |
1386 | default: | |
1387 | case E_AVR_MACH_AVR2: | |
1388 | e_set = bfd_mach_avr2; | |
1389 | break; | |
1390 | ||
1391 | case E_AVR_MACH_AVR1: | |
1392 | e_set = bfd_mach_avr1; | |
1393 | break; | |
1394 | ||
7b21ac3f EW |
1395 | case E_AVR_MACH_AVR25: |
1396 | e_set = bfd_mach_avr25; | |
1397 | break; | |
1398 | ||
adde6300 AM |
1399 | case E_AVR_MACH_AVR3: |
1400 | e_set = bfd_mach_avr3; | |
1401 | break; | |
1402 | ||
7b21ac3f EW |
1403 | case E_AVR_MACH_AVR31: |
1404 | e_set = bfd_mach_avr31; | |
1405 | break; | |
1406 | ||
1407 | case E_AVR_MACH_AVR35: | |
1408 | e_set = bfd_mach_avr35; | |
1409 | break; | |
1410 | ||
adde6300 AM |
1411 | case E_AVR_MACH_AVR4: |
1412 | e_set = bfd_mach_avr4; | |
1413 | break; | |
65aa24b6 NC |
1414 | |
1415 | case E_AVR_MACH_AVR5: | |
1416 | e_set = bfd_mach_avr5; | |
1417 | break; | |
28c9d252 | 1418 | |
7b21ac3f EW |
1419 | case E_AVR_MACH_AVR51: |
1420 | e_set = bfd_mach_avr51; | |
1421 | break; | |
1422 | ||
28c9d252 NC |
1423 | case E_AVR_MACH_AVR6: |
1424 | e_set = bfd_mach_avr6; | |
1425 | break; | |
8cc66334 EW |
1426 | |
1427 | case E_AVR_MACH_XMEGA1: | |
1428 | e_set = bfd_mach_avrxmega1; | |
1429 | break; | |
1430 | ||
1431 | case E_AVR_MACH_XMEGA2: | |
1432 | e_set = bfd_mach_avrxmega2; | |
1433 | break; | |
1434 | ||
1435 | case E_AVR_MACH_XMEGA3: | |
1436 | e_set = bfd_mach_avrxmega3; | |
1437 | break; | |
1438 | ||
1439 | case E_AVR_MACH_XMEGA4: | |
1440 | e_set = bfd_mach_avrxmega4; | |
1441 | break; | |
1442 | ||
1443 | case E_AVR_MACH_XMEGA5: | |
1444 | e_set = bfd_mach_avrxmega5; | |
1445 | break; | |
1446 | ||
1447 | case E_AVR_MACH_XMEGA6: | |
1448 | e_set = bfd_mach_avrxmega6; | |
1449 | break; | |
1450 | ||
1451 | case E_AVR_MACH_XMEGA7: | |
1452 | e_set = bfd_mach_avrxmega7; | |
1453 | break; | |
adde6300 AM |
1454 | } |
1455 | } | |
1456 | return bfd_default_set_arch_mach (abfd, bfd_arch_avr, | |
1457 | e_set); | |
1458 | } | |
1459 | ||
df406460 | 1460 | |
4cdc7696 NC |
1461 | /* Delete some bytes from a section while changing the size of an instruction. |
1462 | The parameter "addr" denotes the section-relative offset pointing just | |
1463 | behind the shrinked instruction. "addr+count" point at the first | |
1464 | byte just behind the original unshrinked instruction. */ | |
1465 | ||
1466 | static bfd_boolean | |
1467 | elf32_avr_relax_delete_bytes (bfd *abfd, | |
73160847 | 1468 | asection *sec, |
4cdc7696 | 1469 | bfd_vma addr, |
73160847 | 1470 | int count) |
4cdc7696 NC |
1471 | { |
1472 | Elf_Internal_Shdr *symtab_hdr; | |
1473 | unsigned int sec_shndx; | |
1474 | bfd_byte *contents; | |
1475 | Elf_Internal_Rela *irel, *irelend; | |
4cdc7696 NC |
1476 | Elf_Internal_Sym *isym; |
1477 | Elf_Internal_Sym *isymbuf = NULL; | |
4cdc7696 NC |
1478 | bfd_vma toaddr; |
1479 | struct elf_link_hash_entry **sym_hashes; | |
1480 | struct elf_link_hash_entry **end_hashes; | |
1481 | unsigned int symcount; | |
1482 | ||
1483 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1484 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); | |
1485 | contents = elf_section_data (sec)->this_hdr.contents; | |
1486 | ||
4cdc7696 NC |
1487 | toaddr = sec->size; |
1488 | ||
1489 | irel = elf_section_data (sec)->relocs; | |
1490 | irelend = irel + sec->reloc_count; | |
1491 | ||
1492 | /* Actually delete the bytes. */ | |
1493 | if (toaddr - addr - count > 0) | |
1494 | memmove (contents + addr, contents + addr + count, | |
1495 | (size_t) (toaddr - addr - count)); | |
1496 | sec->size -= count; | |
1497 | ||
73160847 | 1498 | /* Adjust all the reloc addresses. */ |
4cdc7696 NC |
1499 | for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) |
1500 | { | |
4cdc7696 | 1501 | bfd_vma old_reloc_address; |
4cdc7696 NC |
1502 | |
1503 | old_reloc_address = (sec->output_section->vma | |
1504 | + sec->output_offset + irel->r_offset); | |
4cdc7696 NC |
1505 | |
1506 | /* Get the new reloc address. */ | |
1507 | if ((irel->r_offset > addr | |
1508 | && irel->r_offset < toaddr)) | |
1509 | { | |
28c9d252 | 1510 | if (debug_relax) |
4cdc7696 NC |
1511 | printf ("Relocation at address 0x%x needs to be moved.\n" |
1512 | "Old section offset: 0x%x, New section offset: 0x%x \n", | |
1513 | (unsigned int) old_reloc_address, | |
1514 | (unsigned int) irel->r_offset, | |
1515 | (unsigned int) ((irel->r_offset) - count)); | |
1516 | ||
1517 | irel->r_offset -= count; | |
1518 | } | |
1519 | ||
73160847 | 1520 | } |
4cdc7696 | 1521 | |
73160847 NC |
1522 | /* The reloc's own addresses are now ok. However, we need to readjust |
1523 | the reloc's addend, i.e. the reloc's value if two conditions are met: | |
1524 | 1.) the reloc is relative to a symbol in this section that | |
1525 | is located in front of the shrinked instruction | |
28c9d252 NC |
1526 | 2.) symbol plus addend end up behind the shrinked instruction. |
1527 | ||
73160847 NC |
1528 | The most common case where this happens are relocs relative to |
1529 | the section-start symbol. | |
28c9d252 | 1530 | |
73160847 NC |
1531 | This step needs to be done for all of the sections of the bfd. */ |
1532 | ||
1533 | { | |
1534 | struct bfd_section *isec; | |
1535 | ||
1536 | for (isec = abfd->sections; isec; isec = isec->next) | |
1537 | { | |
1538 | bfd_vma symval; | |
1539 | bfd_vma shrinked_insn_address; | |
1540 | ||
a1c7aafb NC |
1541 | if (isec->reloc_count == 0) |
1542 | continue; | |
1543 | ||
73160847 NC |
1544 | shrinked_insn_address = (sec->output_section->vma |
1545 | + sec->output_offset + addr - count); | |
1546 | ||
a1c7aafb NC |
1547 | irel = elf_section_data (isec)->relocs; |
1548 | /* PR 12161: Read in the relocs for this section if necessary. */ | |
1549 | if (irel == NULL) | |
6aa82b64 | 1550 | irel = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL, TRUE); |
a1c7aafb NC |
1551 | |
1552 | for (irelend = irel + isec->reloc_count; | |
73160847 NC |
1553 | irel < irelend; |
1554 | irel++) | |
1555 | { | |
28c9d252 | 1556 | /* Read this BFD's local symbols if we haven't done |
73160847 NC |
1557 | so already. */ |
1558 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) | |
1559 | { | |
1560 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
1561 | if (isymbuf == NULL) | |
1562 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
1563 | symtab_hdr->sh_info, 0, | |
1564 | NULL, NULL, NULL); | |
1565 | if (isymbuf == NULL) | |
1566 | return FALSE; | |
1567 | } | |
1568 | ||
1569 | /* Get the value of the symbol referred to by the reloc. */ | |
1570 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
1571 | { | |
1572 | /* A local symbol. */ | |
73160847 NC |
1573 | asection *sym_sec; |
1574 | ||
1575 | isym = isymbuf + ELF32_R_SYM (irel->r_info); | |
1576 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
1577 | symval = isym->st_value; | |
1578 | /* If the reloc is absolute, it will not have | |
1579 | a symbol or section associated with it. */ | |
1580 | if (sym_sec == sec) | |
28c9d252 | 1581 | { |
73160847 NC |
1582 | symval += sym_sec->output_section->vma |
1583 | + sym_sec->output_offset; | |
4cdc7696 | 1584 | |
28c9d252 | 1585 | if (debug_relax) |
73160847 NC |
1586 | printf ("Checking if the relocation's " |
1587 | "addend needs corrections.\n" | |
1588 | "Address of anchor symbol: 0x%x \n" | |
1589 | "Address of relocation target: 0x%x \n" | |
1590 | "Address of relaxed insn: 0x%x \n", | |
1591 | (unsigned int) symval, | |
1592 | (unsigned int) (symval + irel->r_addend), | |
1593 | (unsigned int) shrinked_insn_address); | |
1594 | ||
1595 | if (symval <= shrinked_insn_address | |
1596 | && (symval + irel->r_addend) > shrinked_insn_address) | |
1597 | { | |
1598 | irel->r_addend -= count; | |
1599 | ||
28c9d252 | 1600 | if (debug_relax) |
73160847 NC |
1601 | printf ("Relocation's addend needed to be fixed \n"); |
1602 | } | |
4cdc7696 | 1603 | } |
73160847 | 1604 | /* else...Reference symbol is absolute. No adjustment needed. */ |
28c9d252 NC |
1605 | } |
1606 | /* else...Reference symbol is extern. No need for adjusting | |
73160847 | 1607 | the addend. */ |
28c9d252 | 1608 | } |
73160847 NC |
1609 | } |
1610 | } | |
4cdc7696 NC |
1611 | |
1612 | /* Adjust the local symbols defined in this section. */ | |
1613 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; | |
12123067 NC |
1614 | /* Fix PR 9841, there may be no local symbols. */ |
1615 | if (isym != NULL) | |
4cdc7696 | 1616 | { |
12123067 NC |
1617 | Elf_Internal_Sym *isymend; |
1618 | ||
1619 | isymend = isym + symtab_hdr->sh_info; | |
1620 | for (; isym < isymend; isym++) | |
1621 | { | |
1622 | if (isym->st_shndx == sec_shndx | |
1623 | && isym->st_value > addr | |
1624 | && isym->st_value < toaddr) | |
1625 | isym->st_value -= count; | |
1626 | } | |
4cdc7696 NC |
1627 | } |
1628 | ||
1629 | /* Now adjust the global symbols defined in this section. */ | |
1630 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) | |
1631 | - symtab_hdr->sh_info); | |
1632 | sym_hashes = elf_sym_hashes (abfd); | |
1633 | end_hashes = sym_hashes + symcount; | |
1634 | for (; sym_hashes < end_hashes; sym_hashes++) | |
1635 | { | |
1636 | struct elf_link_hash_entry *sym_hash = *sym_hashes; | |
1637 | if ((sym_hash->root.type == bfd_link_hash_defined | |
1638 | || sym_hash->root.type == bfd_link_hash_defweak) | |
1639 | && sym_hash->root.u.def.section == sec | |
1640 | && sym_hash->root.u.def.value > addr | |
1641 | && sym_hash->root.u.def.value < toaddr) | |
1642 | { | |
1643 | sym_hash->root.u.def.value -= count; | |
1644 | } | |
1645 | } | |
1646 | ||
1647 | return TRUE; | |
1648 | } | |
1649 | ||
df406460 NC |
1650 | /* This function handles relaxing for the avr. |
1651 | Many important relaxing opportunities within functions are already | |
1652 | realized by the compiler itself. | |
1653 | Here we try to replace call (4 bytes) -> rcall (2 bytes) | |
4cdc7696 NC |
1654 | and jump -> rjmp (safes also 2 bytes). |
1655 | As well we now optimize seqences of | |
df406460 NC |
1656 | - call/rcall function |
1657 | - ret | |
1658 | to yield | |
1659 | - jmp/rjmp function | |
1660 | - ret | |
1661 | . In case that within a sequence | |
1662 | - jmp/rjmp label | |
1663 | - ret | |
1664 | the ret could no longer be reached it is optimized away. In order | |
1665 | to check if the ret is no longer needed, it is checked that the ret's address | |
1666 | is not the target of a branch or jump within the same section, it is checked | |
1667 | that there is no skip instruction before the jmp/rjmp and that there | |
1668 | is no local or global label place at the address of the ret. | |
4cdc7696 | 1669 | |
df406460 | 1670 | We refrain from relaxing within sections ".vectors" and |
4cdc7696 | 1671 | ".jumptables" in order to maintain the position of the instructions. |
df406460 | 1672 | There, however, we substitute jmp/call by a sequence rjmp,nop/rcall,nop |
4cdc7696 | 1673 | if possible. (In future one could possibly use the space of the nop |
df406460 NC |
1674 | for the first instruction of the irq service function. |
1675 | ||
1676 | The .jumptables sections is meant to be used for a future tablejump variant | |
1677 | for the devices with 3-byte program counter where the table itself | |
4cdc7696 | 1678 | contains 4-byte jump instructions whose relative offset must not |
df406460 | 1679 | be changed. */ |
4cdc7696 | 1680 | |
28c9d252 | 1681 | static bfd_boolean |
4cdc7696 NC |
1682 | elf32_avr_relax_section (bfd *abfd, |
1683 | asection *sec, | |
df406460 NC |
1684 | struct bfd_link_info *link_info, |
1685 | bfd_boolean *again) | |
1686 | { | |
1687 | Elf_Internal_Shdr *symtab_hdr; | |
1688 | Elf_Internal_Rela *internal_relocs; | |
1689 | Elf_Internal_Rela *irel, *irelend; | |
1690 | bfd_byte *contents = NULL; | |
1691 | Elf_Internal_Sym *isymbuf = NULL; | |
28c9d252 NC |
1692 | struct elf32_avr_link_hash_table *htab; |
1693 | ||
526f25b2 | 1694 | /* If 'shrinkable' is FALSE, do not shrink by deleting bytes while |
68ffbac6 L |
1695 | relaxing. Such shrinking can cause issues for the sections such |
1696 | as .vectors and .jumptables. Instead the unused bytes should be | |
526f25b2 EW |
1697 | filled with nop instructions. */ |
1698 | bfd_boolean shrinkable = TRUE; | |
1699 | ||
1700 | if (!strcmp (sec->name,".vectors") | |
1701 | || !strcmp (sec->name,".jumptables")) | |
1702 | shrinkable = FALSE; | |
1703 | ||
c8a1f254 NS |
1704 | if (link_info->relocatable) |
1705 | (*link_info->callbacks->einfo) | |
1706 | (_("%P%F: --relax and -r may not be used together\n")); | |
1707 | ||
28c9d252 | 1708 | htab = avr_link_hash_table (link_info); |
64ee10b6 NC |
1709 | if (htab == NULL) |
1710 | return FALSE; | |
df406460 NC |
1711 | |
1712 | /* Assume nothing changes. */ | |
1713 | *again = FALSE; | |
1714 | ||
28c9d252 NC |
1715 | if ((!htab->no_stubs) && (sec == htab->stub_sec)) |
1716 | { | |
1717 | /* We are just relaxing the stub section. | |
1718 | Let's calculate the size needed again. */ | |
1719 | bfd_size_type last_estimated_stub_section_size = htab->stub_sec->size; | |
1720 | ||
1721 | if (debug_relax) | |
1722 | printf ("Relaxing the stub section. Size prior to this pass: %i\n", | |
1723 | (int) last_estimated_stub_section_size); | |
1724 | ||
1725 | elf32_avr_size_stubs (htab->stub_sec->output_section->owner, | |
1726 | link_info, FALSE); | |
1727 | ||
1728 | /* Check if the number of trampolines changed. */ | |
1729 | if (last_estimated_stub_section_size != htab->stub_sec->size) | |
1730 | *again = TRUE; | |
1731 | ||
1732 | if (debug_relax) | |
1733 | printf ("Size of stub section after this pass: %i\n", | |
1734 | (int) htab->stub_sec->size); | |
1735 | ||
1736 | return TRUE; | |
1737 | } | |
1738 | ||
df406460 NC |
1739 | /* We don't have to do anything for a relocatable link, if |
1740 | this section does not have relocs, or if this is not a | |
1741 | code section. */ | |
1742 | if (link_info->relocatable | |
1743 | || (sec->flags & SEC_RELOC) == 0 | |
1744 | || sec->reloc_count == 0 | |
1745 | || (sec->flags & SEC_CODE) == 0) | |
1746 | return TRUE; | |
4cdc7696 | 1747 | |
df406460 NC |
1748 | /* Check if the object file to relax uses internal symbols so that we |
1749 | could fix up the relocations. */ | |
df406460 NC |
1750 | if (!(elf_elfheader (abfd)->e_flags & EF_AVR_LINKRELAX_PREPARED)) |
1751 | return TRUE; | |
df406460 NC |
1752 | |
1753 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1754 | ||
1755 | /* Get a copy of the native relocations. */ | |
1756 | internal_relocs = (_bfd_elf_link_read_relocs | |
4cdc7696 | 1757 | (abfd, sec, NULL, NULL, link_info->keep_memory)); |
df406460 NC |
1758 | if (internal_relocs == NULL) |
1759 | goto error_return; | |
1760 | ||
df406460 NC |
1761 | /* Walk through the relocs looking for relaxing opportunities. */ |
1762 | irelend = internal_relocs + sec->reloc_count; | |
1763 | for (irel = internal_relocs; irel < irelend; irel++) | |
1764 | { | |
1765 | bfd_vma symval; | |
1766 | ||
4cdc7696 | 1767 | if ( ELF32_R_TYPE (irel->r_info) != R_AVR_13_PCREL |
91d6fa6a NC |
1768 | && ELF32_R_TYPE (irel->r_info) != R_AVR_7_PCREL |
1769 | && ELF32_R_TYPE (irel->r_info) != R_AVR_CALL) | |
df406460 | 1770 | continue; |
4cdc7696 | 1771 | |
df406460 NC |
1772 | /* Get the section contents if we haven't done so already. */ |
1773 | if (contents == NULL) | |
1774 | { | |
1775 | /* Get cached copy if it exists. */ | |
1776 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1777 | contents = elf_section_data (sec)->this_hdr.contents; | |
1778 | else | |
1779 | { | |
1780 | /* Go get them off disk. */ | |
4cdc7696 | 1781 | if (! bfd_malloc_and_get_section (abfd, sec, &contents)) |
df406460 NC |
1782 | goto error_return; |
1783 | } | |
1784 | } | |
1785 | ||
91d6fa6a | 1786 | /* Read this BFD's local symbols if we haven't done so already. */ |
df406460 NC |
1787 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) |
1788 | { | |
1789 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
1790 | if (isymbuf == NULL) | |
1791 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
1792 | symtab_hdr->sh_info, 0, | |
1793 | NULL, NULL, NULL); | |
1794 | if (isymbuf == NULL) | |
1795 | goto error_return; | |
1796 | } | |
1797 | ||
1798 | ||
1799 | /* Get the value of the symbol referred to by the reloc. */ | |
1800 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
1801 | { | |
1802 | /* A local symbol. */ | |
1803 | Elf_Internal_Sym *isym; | |
1804 | asection *sym_sec; | |
1805 | ||
1806 | isym = isymbuf + ELF32_R_SYM (irel->r_info); | |
1807 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
1808 | symval = isym->st_value; | |
1809 | /* If the reloc is absolute, it will not have | |
1810 | a symbol or section associated with it. */ | |
1811 | if (sym_sec) | |
1812 | symval += sym_sec->output_section->vma | |
1813 | + sym_sec->output_offset; | |
1814 | } | |
1815 | else | |
1816 | { | |
1817 | unsigned long indx; | |
1818 | struct elf_link_hash_entry *h; | |
1819 | ||
1820 | /* An external symbol. */ | |
1821 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; | |
1822 | h = elf_sym_hashes (abfd)[indx]; | |
1823 | BFD_ASSERT (h != NULL); | |
1824 | if (h->root.type != bfd_link_hash_defined | |
1825 | && h->root.type != bfd_link_hash_defweak) | |
4cdc7696 NC |
1826 | /* This appears to be a reference to an undefined |
1827 | symbol. Just ignore it--it will be caught by the | |
1828 | regular reloc processing. */ | |
1829 | continue; | |
1830 | ||
df406460 NC |
1831 | symval = (h->root.u.def.value |
1832 | + h->root.u.def.section->output_section->vma | |
1833 | + h->root.u.def.section->output_offset); | |
1834 | } | |
1835 | ||
1836 | /* For simplicity of coding, we are going to modify the section | |
1837 | contents, the section relocs, and the BFD symbol table. We | |
1838 | must tell the rest of the code not to free up this | |
1839 | information. It would be possible to instead create a table | |
1840 | of changes which have to be made, as is done in coff-mips.c; | |
1841 | that would be more work, but would require less memory when | |
1842 | the linker is run. */ | |
1843 | switch (ELF32_R_TYPE (irel->r_info)) | |
1844 | { | |
91d6fa6a NC |
1845 | /* Try to turn a 22-bit absolute call/jump into an 13-bit |
1846 | pc-relative rcall/rjmp. */ | |
1847 | case R_AVR_CALL: | |
df406460 NC |
1848 | { |
1849 | bfd_vma value = symval + irel->r_addend; | |
1850 | bfd_vma dot, gap; | |
1851 | int distance_short_enough = 0; | |
1852 | ||
1853 | /* Get the address of this instruction. */ | |
1854 | dot = (sec->output_section->vma | |
1855 | + sec->output_offset + irel->r_offset); | |
1856 | ||
1857 | /* Compute the distance from this insn to the branch target. */ | |
1858 | gap = value - dot; | |
1859 | ||
526f25b2 EW |
1860 | /* Check if the gap falls in the range that can be accommodated |
1861 | in 13bits signed (It is 12bits when encoded, as we deal with | |
1862 | word addressing). */ | |
1863 | if (!shrinkable && ((int) gap >= -4096 && (int) gap <= 4095)) | |
1864 | distance_short_enough = 1; | |
1865 | /* If shrinkable, then we can check for a range of distance which | |
1866 | is two bytes farther on both the directions because the call | |
68ffbac6 | 1867 | or jump target will be closer by two bytes after the |
526f25b2 EW |
1868 | relaxation. */ |
1869 | else if (shrinkable && ((int) gap >= -4094 && (int) gap <= 4097)) | |
df406460 NC |
1870 | distance_short_enough = 1; |
1871 | ||
1872 | /* Here we handle the wrap-around case. E.g. for a 16k device | |
4cdc7696 | 1873 | we could use a rjmp to jump from address 0x100 to 0x3d00! |
df406460 NC |
1874 | In order to make this work properly, we need to fill the |
1875 | vaiable avr_pc_wrap_around with the appropriate value. | |
1876 | I.e. 0x4000 for a 16k device. */ | |
1877 | { | |
91d6fa6a NC |
1878 | /* Shrinking the code size makes the gaps larger in the |
1879 | case of wrap-arounds. So we use a heuristical safety | |
1880 | margin to avoid that during relax the distance gets | |
1881 | again too large for the short jumps. Let's assume | |
1882 | a typical code-size reduction due to relax for a | |
1883 | 16k device of 600 bytes. So let's use twice the | |
1884 | typical value as safety margin. */ | |
1885 | int rgap; | |
1886 | int safety_margin; | |
1887 | ||
1888 | int assumed_shrink = 600; | |
1889 | if (avr_pc_wrap_around > 0x4000) | |
1890 | assumed_shrink = 900; | |
1891 | ||
1892 | safety_margin = 2 * assumed_shrink; | |
1893 | ||
1894 | rgap = avr_relative_distance_considering_wrap_around (gap); | |
1895 | ||
1896 | if (rgap >= (-4092 + safety_margin) | |
1897 | && rgap <= (4094 - safety_margin)) | |
1898 | distance_short_enough = 1; | |
4cdc7696 | 1899 | } |
df406460 NC |
1900 | |
1901 | if (distance_short_enough) | |
1902 | { | |
1903 | unsigned char code_msb; | |
1904 | unsigned char code_lsb; | |
1905 | ||
28c9d252 | 1906 | if (debug_relax) |
df406460 NC |
1907 | printf ("shrinking jump/call instruction at address 0x%x" |
1908 | " in section %s\n\n", | |
1909 | (int) dot, sec->name); | |
1910 | ||
1911 | /* Note that we've changed the relocs, section contents, | |
1912 | etc. */ | |
1913 | elf_section_data (sec)->relocs = internal_relocs; | |
1914 | elf_section_data (sec)->this_hdr.contents = contents; | |
1915 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
1916 | ||
1917 | /* Get the instruction code for relaxing. */ | |
1918 | code_lsb = bfd_get_8 (abfd, contents + irel->r_offset); | |
1919 | code_msb = bfd_get_8 (abfd, contents + irel->r_offset + 1); | |
1920 | ||
1921 | /* Mask out the relocation bits. */ | |
1922 | code_msb &= 0x94; | |
1923 | code_lsb &= 0x0E; | |
1924 | if (code_msb == 0x94 && code_lsb == 0x0E) | |
1925 | { | |
1926 | /* we are changing call -> rcall . */ | |
1927 | bfd_put_8 (abfd, 0x00, contents + irel->r_offset); | |
1928 | bfd_put_8 (abfd, 0xD0, contents + irel->r_offset + 1); | |
1929 | } | |
1930 | else if (code_msb == 0x94 && code_lsb == 0x0C) | |
1931 | { | |
1932 | /* we are changeing jump -> rjmp. */ | |
1933 | bfd_put_8 (abfd, 0x00, contents + irel->r_offset); | |
1934 | bfd_put_8 (abfd, 0xC0, contents + irel->r_offset + 1); | |
1935 | } | |
4cdc7696 | 1936 | else |
df406460 NC |
1937 | abort (); |
1938 | ||
1939 | /* Fix the relocation's type. */ | |
1940 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
1941 | R_AVR_13_PCREL); | |
1942 | ||
526f25b2 | 1943 | /* We should not modify the ordering if 'shrinkable' is |
68ffbac6 | 1944 | FALSE. */ |
526f25b2 | 1945 | if (!shrinkable) |
df406460 NC |
1946 | { |
1947 | /* Let's insert a nop. */ | |
1948 | bfd_put_8 (abfd, 0x00, contents + irel->r_offset + 2); | |
1949 | bfd_put_8 (abfd, 0x00, contents + irel->r_offset + 3); | |
1950 | } | |
1951 | else | |
1952 | { | |
1953 | /* Delete two bytes of data. */ | |
1954 | if (!elf32_avr_relax_delete_bytes (abfd, sec, | |
1955 | irel->r_offset + 2, 2)) | |
1956 | goto error_return; | |
1957 | ||
1958 | /* That will change things, so, we should relax again. | |
1959 | Note that this is not required, and it may be slow. */ | |
1960 | *again = TRUE; | |
1961 | } | |
1962 | } | |
1963 | } | |
4cdc7696 | 1964 | |
df406460 NC |
1965 | default: |
1966 | { | |
1967 | unsigned char code_msb; | |
1968 | unsigned char code_lsb; | |
1969 | bfd_vma dot; | |
1970 | ||
1971 | code_msb = bfd_get_8 (abfd, contents + irel->r_offset + 1); | |
1972 | code_lsb = bfd_get_8 (abfd, contents + irel->r_offset + 0); | |
1973 | ||
1974 | /* Get the address of this instruction. */ | |
1975 | dot = (sec->output_section->vma | |
1976 | + sec->output_offset + irel->r_offset); | |
4cdc7696 NC |
1977 | |
1978 | /* Here we look for rcall/ret or call/ret sequences that could be | |
28c9d252 NC |
1979 | safely replaced by rjmp/ret or jmp/ret. */ |
1980 | if (((code_msb & 0xf0) == 0xd0) | |
1981 | && avr_replace_call_ret_sequences) | |
df406460 NC |
1982 | { |
1983 | /* This insn is a rcall. */ | |
1984 | unsigned char next_insn_msb = 0; | |
1985 | unsigned char next_insn_lsb = 0; | |
1986 | ||
1987 | if (irel->r_offset + 3 < sec->size) | |
1988 | { | |
4cdc7696 | 1989 | next_insn_msb = |
91d6fa6a | 1990 | bfd_get_8 (abfd, contents + irel->r_offset + 3); |
4cdc7696 | 1991 | next_insn_lsb = |
91d6fa6a | 1992 | bfd_get_8 (abfd, contents + irel->r_offset + 2); |
df406460 | 1993 | } |
4cdc7696 NC |
1994 | |
1995 | if ((0x95 == next_insn_msb) && (0x08 == next_insn_lsb)) | |
df406460 NC |
1996 | { |
1997 | /* The next insn is a ret. We now convert the rcall insn | |
1998 | into a rjmp instruction. */ | |
df406460 NC |
1999 | code_msb &= 0xef; |
2000 | bfd_put_8 (abfd, code_msb, contents + irel->r_offset + 1); | |
28c9d252 | 2001 | if (debug_relax) |
df406460 NC |
2002 | printf ("converted rcall/ret sequence at address 0x%x" |
2003 | " into rjmp/ret sequence. Section is %s\n\n", | |
2004 | (int) dot, sec->name); | |
2005 | *again = TRUE; | |
2006 | break; | |
2007 | } | |
2008 | } | |
2009 | else if ((0x94 == (code_msb & 0xfe)) | |
28c9d252 NC |
2010 | && (0x0e == (code_lsb & 0x0e)) |
2011 | && avr_replace_call_ret_sequences) | |
df406460 NC |
2012 | { |
2013 | /* This insn is a call. */ | |
2014 | unsigned char next_insn_msb = 0; | |
2015 | unsigned char next_insn_lsb = 0; | |
2016 | ||
2017 | if (irel->r_offset + 5 < sec->size) | |
2018 | { | |
2019 | next_insn_msb = | |
91d6fa6a | 2020 | bfd_get_8 (abfd, contents + irel->r_offset + 5); |
df406460 | 2021 | next_insn_lsb = |
91d6fa6a | 2022 | bfd_get_8 (abfd, contents + irel->r_offset + 4); |
df406460 | 2023 | } |
4cdc7696 | 2024 | |
df406460 NC |
2025 | if ((0x95 == next_insn_msb) && (0x08 == next_insn_lsb)) |
2026 | { | |
2027 | /* The next insn is a ret. We now convert the call insn | |
2028 | into a jmp instruction. */ | |
2029 | ||
2030 | code_lsb &= 0xfd; | |
2031 | bfd_put_8 (abfd, code_lsb, contents + irel->r_offset); | |
28c9d252 | 2032 | if (debug_relax) |
df406460 NC |
2033 | printf ("converted call/ret sequence at address 0x%x" |
2034 | " into jmp/ret sequence. Section is %s\n\n", | |
2035 | (int) dot, sec->name); | |
2036 | *again = TRUE; | |
2037 | break; | |
2038 | } | |
2039 | } | |
4cdc7696 NC |
2040 | else if ((0xc0 == (code_msb & 0xf0)) |
2041 | || ((0x94 == (code_msb & 0xfe)) | |
df406460 NC |
2042 | && (0x0c == (code_lsb & 0x0e)))) |
2043 | { | |
4cdc7696 | 2044 | /* This insn is a rjmp or a jmp. */ |
df406460 NC |
2045 | unsigned char next_insn_msb = 0; |
2046 | unsigned char next_insn_lsb = 0; | |
2047 | int insn_size; | |
2048 | ||
2049 | if (0xc0 == (code_msb & 0xf0)) | |
2050 | insn_size = 2; /* rjmp insn */ | |
2051 | else | |
2052 | insn_size = 4; /* jmp insn */ | |
2053 | ||
2054 | if (irel->r_offset + insn_size + 1 < sec->size) | |
2055 | { | |
4cdc7696 | 2056 | next_insn_msb = |
91d6fa6a NC |
2057 | bfd_get_8 (abfd, contents + irel->r_offset |
2058 | + insn_size + 1); | |
4cdc7696 | 2059 | next_insn_lsb = |
91d6fa6a NC |
2060 | bfd_get_8 (abfd, contents + irel->r_offset |
2061 | + insn_size); | |
df406460 NC |
2062 | } |
2063 | ||
2064 | if ((0x95 == next_insn_msb) && (0x08 == next_insn_lsb)) | |
2065 | { | |
2066 | /* The next insn is a ret. We possibly could delete | |
cc643b88 | 2067 | this ret. First we need to check for preceding |
df406460 NC |
2068 | sbis/sbic/sbrs or cpse "skip" instructions. */ |
2069 | ||
cc643b88 | 2070 | int there_is_preceding_non_skip_insn = 1; |
df406460 NC |
2071 | bfd_vma address_of_ret; |
2072 | ||
2073 | address_of_ret = dot + insn_size; | |
2074 | ||
28c9d252 | 2075 | if (debug_relax && (insn_size == 2)) |
4cdc7696 | 2076 | printf ("found rjmp / ret sequence at address 0x%x\n", |
df406460 | 2077 | (int) dot); |
28c9d252 | 2078 | if (debug_relax && (insn_size == 4)) |
4cdc7696 | 2079 | printf ("found jmp / ret sequence at address 0x%x\n", |
df406460 NC |
2080 | (int) dot); |
2081 | ||
cc643b88 | 2082 | /* We have to make sure that there is a preceding insn. */ |
df406460 NC |
2083 | if (irel->r_offset >= 2) |
2084 | { | |
cc643b88 NC |
2085 | unsigned char preceding_msb; |
2086 | unsigned char preceding_lsb; | |
2087 | ||
2088 | preceding_msb = | |
91d6fa6a | 2089 | bfd_get_8 (abfd, contents + irel->r_offset - 1); |
cc643b88 | 2090 | preceding_lsb = |
91d6fa6a | 2091 | bfd_get_8 (abfd, contents + irel->r_offset - 2); |
df406460 NC |
2092 | |
2093 | /* sbic. */ | |
cc643b88 NC |
2094 | if (0x99 == preceding_msb) |
2095 | there_is_preceding_non_skip_insn = 0; | |
df406460 NC |
2096 | |
2097 | /* sbis. */ | |
cc643b88 NC |
2098 | if (0x9b == preceding_msb) |
2099 | there_is_preceding_non_skip_insn = 0; | |
df406460 NC |
2100 | |
2101 | /* sbrc */ | |
cc643b88 NC |
2102 | if ((0xfc == (preceding_msb & 0xfe) |
2103 | && (0x00 == (preceding_lsb & 0x08)))) | |
2104 | there_is_preceding_non_skip_insn = 0; | |
df406460 | 2105 | |
4cdc7696 | 2106 | /* sbrs */ |
cc643b88 NC |
2107 | if ((0xfe == (preceding_msb & 0xfe) |
2108 | && (0x00 == (preceding_lsb & 0x08)))) | |
2109 | there_is_preceding_non_skip_insn = 0; | |
4cdc7696 | 2110 | |
df406460 | 2111 | /* cpse */ |
cc643b88 NC |
2112 | if (0x10 == (preceding_msb & 0xfc)) |
2113 | there_is_preceding_non_skip_insn = 0; | |
4cdc7696 | 2114 | |
cc643b88 | 2115 | if (there_is_preceding_non_skip_insn == 0) |
28c9d252 | 2116 | if (debug_relax) |
cc643b88 NC |
2117 | printf ("preceding skip insn prevents deletion of" |
2118 | " ret insn at Addy 0x%x in section %s\n", | |
df406460 NC |
2119 | (int) dot + 2, sec->name); |
2120 | } | |
2121 | else | |
2122 | { | |
2123 | /* There is no previous instruction. */ | |
cc643b88 | 2124 | there_is_preceding_non_skip_insn = 0; |
4cdc7696 | 2125 | } |
df406460 | 2126 | |
cc643b88 | 2127 | if (there_is_preceding_non_skip_insn) |
df406460 NC |
2128 | { |
2129 | /* We now only have to make sure that there is no | |
2130 | local label defined at the address of the ret | |
2131 | instruction and that there is no local relocation | |
2132 | in this section pointing to the ret. */ | |
2133 | ||
2134 | int deleting_ret_is_safe = 1; | |
4cdc7696 | 2135 | unsigned int section_offset_of_ret_insn = |
91d6fa6a | 2136 | irel->r_offset + insn_size; |
df406460 NC |
2137 | Elf_Internal_Sym *isym, *isymend; |
2138 | unsigned int sec_shndx; | |
8d6a12ee | 2139 | struct bfd_section *isec; |
4cdc7696 NC |
2140 | |
2141 | sec_shndx = | |
2142 | _bfd_elf_section_from_bfd_section (abfd, sec); | |
df406460 NC |
2143 | |
2144 | /* Check for local symbols. */ | |
2145 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; | |
2146 | isymend = isym + symtab_hdr->sh_info; | |
696b7ad2 NC |
2147 | /* PR 6019: There may not be any local symbols. */ |
2148 | for (; isym != NULL && isym < isymend; isym++) | |
91d6fa6a NC |
2149 | { |
2150 | if (isym->st_value == section_offset_of_ret_insn | |
2151 | && isym->st_shndx == sec_shndx) | |
2152 | { | |
2153 | deleting_ret_is_safe = 0; | |
2154 | if (debug_relax) | |
2155 | printf ("local label prevents deletion of ret " | |
2156 | "insn at address 0x%x\n", | |
2157 | (int) dot + insn_size); | |
2158 | } | |
2159 | } | |
2160 | ||
2161 | /* Now check for global symbols. */ | |
2162 | { | |
2163 | int symcount; | |
2164 | struct elf_link_hash_entry **sym_hashes; | |
2165 | struct elf_link_hash_entry **end_hashes; | |
2166 | ||
2167 | symcount = (symtab_hdr->sh_size | |
2168 | / sizeof (Elf32_External_Sym) | |
2169 | - symtab_hdr->sh_info); | |
2170 | sym_hashes = elf_sym_hashes (abfd); | |
2171 | end_hashes = sym_hashes + symcount; | |
2172 | for (; sym_hashes < end_hashes; sym_hashes++) | |
2173 | { | |
2174 | struct elf_link_hash_entry *sym_hash = | |
2175 | *sym_hashes; | |
2176 | if ((sym_hash->root.type == bfd_link_hash_defined | |
2177 | || sym_hash->root.type == | |
4cdc7696 | 2178 | bfd_link_hash_defweak) |
91d6fa6a NC |
2179 | && sym_hash->root.u.def.section == sec |
2180 | && sym_hash->root.u.def.value == section_offset_of_ret_insn) | |
2181 | { | |
2182 | deleting_ret_is_safe = 0; | |
2183 | if (debug_relax) | |
2184 | printf ("global label prevents deletion of " | |
2185 | "ret insn at address 0x%x\n", | |
2186 | (int) dot + insn_size); | |
2187 | } | |
2188 | } | |
2189 | } | |
91d6fa6a | 2190 | |
8d6a12ee NC |
2191 | /* Now we check for relocations pointing to ret. */ |
2192 | for (isec = abfd->sections; isec && deleting_ret_is_safe; isec = isec->next) | |
2193 | { | |
2194 | Elf_Internal_Rela *rel; | |
2195 | Elf_Internal_Rela *relend; | |
2196 | ||
2197 | rel = elf_section_data (isec)->relocs; | |
2198 | if (rel == NULL) | |
2199 | rel = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL, TRUE); | |
91d6fa6a | 2200 | |
8d6a12ee | 2201 | relend = rel + isec->reloc_count; |
91d6fa6a | 2202 | |
8d6a12ee NC |
2203 | for (; rel && rel < relend; rel++) |
2204 | { | |
2205 | bfd_vma reloc_target = 0; | |
2206 | ||
2207 | /* Read this BFD's local symbols if we haven't | |
2208 | done so already. */ | |
2209 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) | |
2210 | { | |
2211 | isymbuf = (Elf_Internal_Sym *) | |
2212 | symtab_hdr->contents; | |
2213 | if (isymbuf == NULL) | |
2214 | isymbuf = bfd_elf_get_elf_syms | |
2215 | (abfd, | |
2216 | symtab_hdr, | |
2217 | symtab_hdr->sh_info, 0, | |
2218 | NULL, NULL, NULL); | |
2219 | if (isymbuf == NULL) | |
2220 | break; | |
2221 | } | |
2222 | ||
2223 | /* Get the value of the symbol referred to | |
2224 | by the reloc. */ | |
2225 | if (ELF32_R_SYM (rel->r_info) | |
2226 | < symtab_hdr->sh_info) | |
2227 | { | |
2228 | /* A local symbol. */ | |
2229 | asection *sym_sec; | |
2230 | ||
2231 | isym = isymbuf | |
2232 | + ELF32_R_SYM (rel->r_info); | |
2233 | sym_sec = bfd_section_from_elf_index | |
2234 | (abfd, isym->st_shndx); | |
2235 | symval = isym->st_value; | |
2236 | ||
2237 | /* If the reloc is absolute, it will not | |
2238 | have a symbol or section associated | |
2239 | with it. */ | |
2240 | ||
2241 | if (sym_sec) | |
2242 | { | |
2243 | symval += | |
2244 | sym_sec->output_section->vma | |
2245 | + sym_sec->output_offset; | |
2246 | reloc_target = symval + rel->r_addend; | |
2247 | } | |
2248 | else | |
2249 | { | |
2250 | reloc_target = symval + rel->r_addend; | |
2251 | /* Reference symbol is absolute. */ | |
2252 | } | |
2253 | } | |
2254 | /* else ... reference symbol is extern. */ | |
2255 | ||
2256 | if (address_of_ret == reloc_target) | |
2257 | { | |
2258 | deleting_ret_is_safe = 0; | |
2259 | if (debug_relax) | |
2260 | printf ("ret from " | |
2261 | "rjmp/jmp ret sequence at address" | |
2262 | " 0x%x could not be deleted. ret" | |
2263 | " is target of a relocation.\n", | |
2264 | (int) address_of_ret); | |
91d6fa6a | 2265 | break; |
8d6a12ee NC |
2266 | } |
2267 | } | |
2268 | } | |
91d6fa6a NC |
2269 | |
2270 | if (deleting_ret_is_safe) | |
2271 | { | |
2272 | if (debug_relax) | |
2273 | printf ("unreachable ret instruction " | |
2274 | "at address 0x%x deleted.\n", | |
2275 | (int) dot + insn_size); | |
2276 | ||
2277 | /* Delete two bytes of data. */ | |
2278 | if (!elf32_avr_relax_delete_bytes (abfd, sec, | |
2279 | irel->r_offset + insn_size, 2)) | |
2280 | goto error_return; | |
2281 | ||
2282 | /* That will change things, so, we should relax | |
2283 | again. Note that this is not required, and it | |
2284 | may be slow. */ | |
2285 | *again = TRUE; | |
2286 | break; | |
2287 | } | |
df406460 | 2288 | } |
4cdc7696 NC |
2289 | } |
2290 | } | |
df406460 NC |
2291 | break; |
2292 | } | |
2293 | } | |
2294 | } | |
2295 | ||
2296 | if (contents != NULL | |
2297 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2298 | { | |
2299 | if (! link_info->keep_memory) | |
2300 | free (contents); | |
2301 | else | |
2302 | { | |
2303 | /* Cache the section contents for elf_link_input_bfd. */ | |
2304 | elf_section_data (sec)->this_hdr.contents = contents; | |
2305 | } | |
2306 | } | |
2307 | ||
2308 | if (internal_relocs != NULL | |
2309 | && elf_section_data (sec)->relocs != internal_relocs) | |
2310 | free (internal_relocs); | |
2311 | ||
2312 | return TRUE; | |
2313 | ||
2314 | error_return: | |
2315 | if (isymbuf != NULL | |
2316 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
2317 | free (isymbuf); | |
2318 | if (contents != NULL | |
2319 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2320 | free (contents); | |
2321 | if (internal_relocs != NULL | |
2322 | && elf_section_data (sec)->relocs != internal_relocs) | |
2323 | free (internal_relocs); | |
2324 | ||
4cdc7696 | 2325 | return FALSE; |
df406460 NC |
2326 | } |
2327 | ||
2328 | /* This is a version of bfd_generic_get_relocated_section_contents | |
4cdc7696 | 2329 | which uses elf32_avr_relocate_section. |
df406460 | 2330 | |
4cdc7696 | 2331 | For avr it's essentially a cut and paste taken from the H8300 port. |
df406460 | 2332 | The author of the relaxation support patch for avr had absolutely no |
4cdc7696 | 2333 | clue what is happening here but found out that this part of the code |
df406460 NC |
2334 | seems to be important. */ |
2335 | ||
2336 | static bfd_byte * | |
2337 | elf32_avr_get_relocated_section_contents (bfd *output_bfd, | |
2338 | struct bfd_link_info *link_info, | |
2339 | struct bfd_link_order *link_order, | |
2340 | bfd_byte *data, | |
2341 | bfd_boolean relocatable, | |
2342 | asymbol **symbols) | |
2343 | { | |
2344 | Elf_Internal_Shdr *symtab_hdr; | |
2345 | asection *input_section = link_order->u.indirect.section; | |
2346 | bfd *input_bfd = input_section->owner; | |
2347 | asection **sections = NULL; | |
2348 | Elf_Internal_Rela *internal_relocs = NULL; | |
2349 | Elf_Internal_Sym *isymbuf = NULL; | |
2350 | ||
2351 | /* We only need to handle the case of relaxing, or of having a | |
2352 | particular set of section contents, specially. */ | |
2353 | if (relocatable | |
2354 | || elf_section_data (input_section)->this_hdr.contents == NULL) | |
2355 | return bfd_generic_get_relocated_section_contents (output_bfd, link_info, | |
2356 | link_order, data, | |
2357 | relocatable, | |
2358 | symbols); | |
2359 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
2360 | ||
2361 | memcpy (data, elf_section_data (input_section)->this_hdr.contents, | |
2362 | (size_t) input_section->size); | |
2363 | ||
2364 | if ((input_section->flags & SEC_RELOC) != 0 | |
2365 | && input_section->reloc_count > 0) | |
2366 | { | |
2367 | asection **secpp; | |
2368 | Elf_Internal_Sym *isym, *isymend; | |
2369 | bfd_size_type amt; | |
2370 | ||
2371 | internal_relocs = (_bfd_elf_link_read_relocs | |
4cdc7696 | 2372 | (input_bfd, input_section, NULL, NULL, FALSE)); |
df406460 NC |
2373 | if (internal_relocs == NULL) |
2374 | goto error_return; | |
2375 | ||
2376 | if (symtab_hdr->sh_info != 0) | |
2377 | { | |
2378 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
2379 | if (isymbuf == NULL) | |
2380 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, | |
2381 | symtab_hdr->sh_info, 0, | |
2382 | NULL, NULL, NULL); | |
2383 | if (isymbuf == NULL) | |
2384 | goto error_return; | |
2385 | } | |
2386 | ||
2387 | amt = symtab_hdr->sh_info; | |
2388 | amt *= sizeof (asection *); | |
4cdc7696 | 2389 | sections = bfd_malloc (amt); |
df406460 NC |
2390 | if (sections == NULL && amt != 0) |
2391 | goto error_return; | |
2392 | ||
2393 | isymend = isymbuf + symtab_hdr->sh_info; | |
2394 | for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp) | |
2395 | { | |
2396 | asection *isec; | |
2397 | ||
2398 | if (isym->st_shndx == SHN_UNDEF) | |
2399 | isec = bfd_und_section_ptr; | |
2400 | else if (isym->st_shndx == SHN_ABS) | |
2401 | isec = bfd_abs_section_ptr; | |
2402 | else if (isym->st_shndx == SHN_COMMON) | |
2403 | isec = bfd_com_section_ptr; | |
2404 | else | |
2405 | isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx); | |
2406 | ||
2407 | *secpp = isec; | |
2408 | } | |
2409 | ||
2410 | if (! elf32_avr_relocate_section (output_bfd, link_info, input_bfd, | |
2411 | input_section, data, internal_relocs, | |
2412 | isymbuf, sections)) | |
2413 | goto error_return; | |
2414 | ||
2415 | if (sections != NULL) | |
2416 | free (sections); | |
2417 | if (isymbuf != NULL | |
2418 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
2419 | free (isymbuf); | |
2420 | if (elf_section_data (input_section)->relocs != internal_relocs) | |
2421 | free (internal_relocs); | |
2422 | } | |
2423 | ||
2424 | return data; | |
2425 | ||
2426 | error_return: | |
2427 | if (sections != NULL) | |
2428 | free (sections); | |
2429 | if (isymbuf != NULL | |
2430 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
2431 | free (isymbuf); | |
2432 | if (internal_relocs != NULL | |
2433 | && elf_section_data (input_section)->relocs != internal_relocs) | |
2434 | free (internal_relocs); | |
2435 | return NULL; | |
2436 | } | |
2437 | ||
2438 | ||
28c9d252 NC |
2439 | /* Determines the hash entry name for a particular reloc. It consists of |
2440 | the identifier of the symbol section and the added reloc addend and | |
2441 | symbol offset relative to the section the symbol is attached to. */ | |
2442 | ||
2443 | static char * | |
2444 | avr_stub_name (const asection *symbol_section, | |
2445 | const bfd_vma symbol_offset, | |
2446 | const Elf_Internal_Rela *rela) | |
2447 | { | |
2448 | char *stub_name; | |
2449 | bfd_size_type len; | |
2450 | ||
2451 | len = 8 + 1 + 8 + 1 + 1; | |
2452 | stub_name = bfd_malloc (len); | |
2453 | ||
2454 | sprintf (stub_name, "%08x+%08x", | |
2455 | symbol_section->id & 0xffffffff, | |
2456 | (unsigned int) ((rela->r_addend & 0xffffffff) + symbol_offset)); | |
2457 | ||
2458 | return stub_name; | |
2459 | } | |
2460 | ||
2461 | ||
2462 | /* Add a new stub entry to the stub hash. Not all fields of the new | |
2463 | stub entry are initialised. */ | |
2464 | ||
2465 | static struct elf32_avr_stub_hash_entry * | |
2466 | avr_add_stub (const char *stub_name, | |
2467 | struct elf32_avr_link_hash_table *htab) | |
2468 | { | |
2469 | struct elf32_avr_stub_hash_entry *hsh; | |
2470 | ||
2471 | /* Enter this entry into the linker stub hash table. */ | |
2472 | hsh = avr_stub_hash_lookup (&htab->bstab, stub_name, TRUE, FALSE); | |
2473 | ||
2474 | if (hsh == NULL) | |
2475 | { | |
2476 | (*_bfd_error_handler) (_("%B: cannot create stub entry %s"), | |
2477 | NULL, stub_name); | |
2478 | return NULL; | |
2479 | } | |
2480 | ||
2481 | hsh->stub_offset = 0; | |
2482 | return hsh; | |
2483 | } | |
2484 | ||
2485 | /* We assume that there is already space allocated for the stub section | |
2486 | contents and that before building the stubs the section size is | |
2487 | initialized to 0. We assume that within the stub hash table entry, | |
2488 | the absolute position of the jmp target has been written in the | |
2489 | target_value field. We write here the offset of the generated jmp insn | |
2490 | relative to the trampoline section start to the stub_offset entry in | |
2491 | the stub hash table entry. */ | |
2492 | ||
2493 | static bfd_boolean | |
2494 | avr_build_one_stub (struct bfd_hash_entry *bh, void *in_arg) | |
2495 | { | |
2496 | struct elf32_avr_stub_hash_entry *hsh; | |
2497 | struct bfd_link_info *info; | |
2498 | struct elf32_avr_link_hash_table *htab; | |
2499 | bfd *stub_bfd; | |
2500 | bfd_byte *loc; | |
2501 | bfd_vma target; | |
2502 | bfd_vma starget; | |
2503 | ||
2504 | /* Basic opcode */ | |
2505 | bfd_vma jmp_insn = 0x0000940c; | |
2506 | ||
2507 | /* Massage our args to the form they really have. */ | |
2508 | hsh = avr_stub_hash_entry (bh); | |
2509 | ||
2510 | if (!hsh->is_actually_needed) | |
2511 | return TRUE; | |
2512 | ||
2513 | info = (struct bfd_link_info *) in_arg; | |
2514 | ||
2515 | htab = avr_link_hash_table (info); | |
64ee10b6 NC |
2516 | if (htab == NULL) |
2517 | return FALSE; | |
28c9d252 NC |
2518 | |
2519 | target = hsh->target_value; | |
2520 | ||
2521 | /* Make a note of the offset within the stubs for this entry. */ | |
2522 | hsh->stub_offset = htab->stub_sec->size; | |
2523 | loc = htab->stub_sec->contents + hsh->stub_offset; | |
2524 | ||
2525 | stub_bfd = htab->stub_sec->owner; | |
2526 | ||
2527 | if (debug_stubs) | |
2528 | printf ("Building one Stub. Address: 0x%x, Offset: 0x%x\n", | |
2529 | (unsigned int) target, | |
2530 | (unsigned int) hsh->stub_offset); | |
2531 | ||
2532 | /* We now have to add the information on the jump target to the bare | |
2533 | opcode bits already set in jmp_insn. */ | |
2534 | ||
2535 | /* Check for the alignment of the address. */ | |
2536 | if (target & 1) | |
2537 | return FALSE; | |
2538 | ||
2539 | starget = target >> 1; | |
2540 | jmp_insn |= ((starget & 0x10000) | ((starget << 3) & 0x1f00000)) >> 16; | |
2541 | bfd_put_16 (stub_bfd, jmp_insn, loc); | |
2542 | bfd_put_16 (stub_bfd, (bfd_vma) starget & 0xffff, loc + 2); | |
2543 | ||
2544 | htab->stub_sec->size += 4; | |
2545 | ||
2546 | /* Now add the entries in the address mapping table if there is still | |
2547 | space left. */ | |
2548 | { | |
2549 | unsigned int nr; | |
2550 | ||
2551 | nr = htab->amt_entry_cnt + 1; | |
2552 | if (nr <= htab->amt_max_entry_cnt) | |
2553 | { | |
2554 | htab->amt_entry_cnt = nr; | |
2555 | ||
2556 | htab->amt_stub_offsets[nr - 1] = hsh->stub_offset; | |
2557 | htab->amt_destination_addr[nr - 1] = target; | |
2558 | } | |
2559 | } | |
2560 | ||
2561 | return TRUE; | |
2562 | } | |
2563 | ||
2564 | static bfd_boolean | |
2565 | avr_mark_stub_not_to_be_necessary (struct bfd_hash_entry *bh, | |
c7e2358a | 2566 | void *in_arg ATTRIBUTE_UNUSED) |
28c9d252 NC |
2567 | { |
2568 | struct elf32_avr_stub_hash_entry *hsh; | |
28c9d252 | 2569 | |
28c9d252 NC |
2570 | hsh = avr_stub_hash_entry (bh); |
2571 | hsh->is_actually_needed = FALSE; | |
2572 | ||
2573 | return TRUE; | |
2574 | } | |
2575 | ||
2576 | static bfd_boolean | |
2577 | avr_size_one_stub (struct bfd_hash_entry *bh, void *in_arg) | |
2578 | { | |
2579 | struct elf32_avr_stub_hash_entry *hsh; | |
2580 | struct elf32_avr_link_hash_table *htab; | |
2581 | int size; | |
2582 | ||
2583 | /* Massage our args to the form they really have. */ | |
2584 | hsh = avr_stub_hash_entry (bh); | |
2585 | htab = in_arg; | |
2586 | ||
2587 | if (hsh->is_actually_needed) | |
2588 | size = 4; | |
2589 | else | |
2590 | size = 0; | |
2591 | ||
2592 | htab->stub_sec->size += size; | |
2593 | return TRUE; | |
2594 | } | |
2595 | ||
2596 | void | |
2597 | elf32_avr_setup_params (struct bfd_link_info *info, | |
2598 | bfd *avr_stub_bfd, | |
2599 | asection *avr_stub_section, | |
2600 | bfd_boolean no_stubs, | |
2601 | bfd_boolean deb_stubs, | |
2602 | bfd_boolean deb_relax, | |
2603 | bfd_vma pc_wrap_around, | |
2604 | bfd_boolean call_ret_replacement) | |
2605 | { | |
64ee10b6 | 2606 | struct elf32_avr_link_hash_table *htab = avr_link_hash_table (info); |
28c9d252 | 2607 | |
64ee10b6 NC |
2608 | if (htab == NULL) |
2609 | return; | |
28c9d252 NC |
2610 | htab->stub_sec = avr_stub_section; |
2611 | htab->stub_bfd = avr_stub_bfd; | |
2612 | htab->no_stubs = no_stubs; | |
2613 | ||
2614 | debug_relax = deb_relax; | |
2615 | debug_stubs = deb_stubs; | |
2616 | avr_pc_wrap_around = pc_wrap_around; | |
2617 | avr_replace_call_ret_sequences = call_ret_replacement; | |
2618 | } | |
2619 | ||
2620 | ||
2621 | /* Set up various things so that we can make a list of input sections | |
2622 | for each output section included in the link. Returns -1 on error, | |
2623 | 0 when no stubs will be needed, and 1 on success. It also sets | |
2624 | information on the stubs bfd and the stub section in the info | |
2625 | struct. */ | |
2626 | ||
2627 | int | |
2628 | elf32_avr_setup_section_lists (bfd *output_bfd, | |
2629 | struct bfd_link_info *info) | |
2630 | { | |
2631 | bfd *input_bfd; | |
2632 | unsigned int bfd_count; | |
2633 | int top_id, top_index; | |
2634 | asection *section; | |
2635 | asection **input_list, **list; | |
2636 | bfd_size_type amt; | |
4dfe6ac6 | 2637 | struct elf32_avr_link_hash_table *htab = avr_link_hash_table (info); |
28c9d252 | 2638 | |
64ee10b6 | 2639 | if (htab == NULL || htab->no_stubs) |
28c9d252 NC |
2640 | return 0; |
2641 | ||
2642 | /* Count the number of input BFDs and find the top input section id. */ | |
2643 | for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; | |
2644 | input_bfd != NULL; | |
2645 | input_bfd = input_bfd->link_next) | |
2646 | { | |
2647 | bfd_count += 1; | |
2648 | for (section = input_bfd->sections; | |
2649 | section != NULL; | |
2650 | section = section->next) | |
2651 | if (top_id < section->id) | |
2652 | top_id = section->id; | |
2653 | } | |
2654 | ||
2655 | htab->bfd_count = bfd_count; | |
2656 | ||
2657 | /* We can't use output_bfd->section_count here to find the top output | |
2658 | section index as some sections may have been removed, and | |
2659 | strip_excluded_output_sections doesn't renumber the indices. */ | |
2660 | for (section = output_bfd->sections, top_index = 0; | |
2661 | section != NULL; | |
2662 | section = section->next) | |
2663 | if (top_index < section->index) | |
2664 | top_index = section->index; | |
2665 | ||
2666 | htab->top_index = top_index; | |
2667 | amt = sizeof (asection *) * (top_index + 1); | |
2668 | input_list = bfd_malloc (amt); | |
2669 | htab->input_list = input_list; | |
2670 | if (input_list == NULL) | |
2671 | return -1; | |
2672 | ||
2673 | /* For sections we aren't interested in, mark their entries with a | |
2674 | value we can check later. */ | |
2675 | list = input_list + top_index; | |
2676 | do | |
2677 | *list = bfd_abs_section_ptr; | |
2678 | while (list-- != input_list); | |
2679 | ||
2680 | for (section = output_bfd->sections; | |
2681 | section != NULL; | |
2682 | section = section->next) | |
2683 | if ((section->flags & SEC_CODE) != 0) | |
2684 | input_list[section->index] = NULL; | |
2685 | ||
2686 | return 1; | |
2687 | } | |
2688 | ||
2689 | ||
2690 | /* Read in all local syms for all input bfds, and create hash entries | |
2691 | for export stubs if we are building a multi-subspace shared lib. | |
2692 | Returns -1 on error, 0 otherwise. */ | |
2693 | ||
2694 | static int | |
2695 | get_local_syms (bfd *input_bfd, struct bfd_link_info *info) | |
2696 | { | |
2697 | unsigned int bfd_indx; | |
2698 | Elf_Internal_Sym *local_syms, **all_local_syms; | |
2699 | struct elf32_avr_link_hash_table *htab = avr_link_hash_table (info); | |
9a008db3 | 2700 | bfd_size_type amt; |
28c9d252 | 2701 | |
64ee10b6 NC |
2702 | if (htab == NULL) |
2703 | return -1; | |
2704 | ||
28c9d252 NC |
2705 | /* We want to read in symbol extension records only once. To do this |
2706 | we need to read in the local symbols in parallel and save them for | |
2707 | later use; so hold pointers to the local symbols in an array. */ | |
9a008db3 | 2708 | amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count; |
28c9d252 NC |
2709 | all_local_syms = bfd_zmalloc (amt); |
2710 | htab->all_local_syms = all_local_syms; | |
2711 | if (all_local_syms == NULL) | |
2712 | return -1; | |
2713 | ||
2714 | /* Walk over all the input BFDs, swapping in local symbols. | |
2715 | If we are creating a shared library, create hash entries for the | |
2716 | export stubs. */ | |
2717 | for (bfd_indx = 0; | |
2718 | input_bfd != NULL; | |
2719 | input_bfd = input_bfd->link_next, bfd_indx++) | |
2720 | { | |
2721 | Elf_Internal_Shdr *symtab_hdr; | |
2722 | ||
2723 | /* We'll need the symbol table in a second. */ | |
2724 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
2725 | if (symtab_hdr->sh_info == 0) | |
2726 | continue; | |
2727 | ||
2728 | /* We need an array of the local symbols attached to the input bfd. */ | |
2729 | local_syms = (Elf_Internal_Sym *) symtab_hdr->contents; | |
2730 | if (local_syms == NULL) | |
2731 | { | |
2732 | local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, | |
2733 | symtab_hdr->sh_info, 0, | |
2734 | NULL, NULL, NULL); | |
2735 | /* Cache them for elf_link_input_bfd. */ | |
2736 | symtab_hdr->contents = (unsigned char *) local_syms; | |
2737 | } | |
2738 | if (local_syms == NULL) | |
2739 | return -1; | |
2740 | ||
2741 | all_local_syms[bfd_indx] = local_syms; | |
2742 | } | |
2743 | ||
2744 | return 0; | |
2745 | } | |
2746 | ||
2747 | #define ADD_DUMMY_STUBS_FOR_DEBUGGING 0 | |
2748 | ||
2749 | bfd_boolean | |
2750 | elf32_avr_size_stubs (bfd *output_bfd, | |
2751 | struct bfd_link_info *info, | |
2752 | bfd_boolean is_prealloc_run) | |
2753 | { | |
64ee10b6 NC |
2754 | struct elf32_avr_link_hash_table *htab; |
2755 | int stub_changed = 0; | |
28c9d252 | 2756 | |
64ee10b6 NC |
2757 | htab = avr_link_hash_table (info); |
2758 | if (htab == NULL) | |
2759 | return FALSE; | |
28c9d252 | 2760 | |
64ee10b6 NC |
2761 | /* At this point we initialize htab->vector_base |
2762 | To the start of the text output section. */ | |
2763 | htab->vector_base = htab->stub_sec->output_section->vma; | |
28c9d252 | 2764 | |
64ee10b6 NC |
2765 | if (get_local_syms (info->input_bfds, info)) |
2766 | { | |
2767 | if (htab->all_local_syms) | |
2768 | goto error_ret_free_local; | |
2769 | return FALSE; | |
2770 | } | |
28c9d252 NC |
2771 | |
2772 | if (ADD_DUMMY_STUBS_FOR_DEBUGGING) | |
2773 | { | |
2774 | struct elf32_avr_stub_hash_entry *test; | |
2775 | ||
2776 | test = avr_add_stub ("Hugo",htab); | |
2777 | test->target_value = 0x123456; | |
2778 | test->stub_offset = 13; | |
2779 | ||
2780 | test = avr_add_stub ("Hugo2",htab); | |
2781 | test->target_value = 0x84210; | |
2782 | test->stub_offset = 14; | |
2783 | } | |
2784 | ||
2785 | while (1) | |
2786 | { | |
2787 | bfd *input_bfd; | |
2788 | unsigned int bfd_indx; | |
2789 | ||
2790 | /* We will have to re-generate the stub hash table each time anything | |
2791 | in memory has changed. */ | |
2792 | ||
2793 | bfd_hash_traverse (&htab->bstab, avr_mark_stub_not_to_be_necessary, htab); | |
2794 | for (input_bfd = info->input_bfds, bfd_indx = 0; | |
2795 | input_bfd != NULL; | |
2796 | input_bfd = input_bfd->link_next, bfd_indx++) | |
2797 | { | |
2798 | Elf_Internal_Shdr *symtab_hdr; | |
2799 | asection *section; | |
2800 | Elf_Internal_Sym *local_syms; | |
2801 | ||
2802 | /* We'll need the symbol table in a second. */ | |
2803 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
2804 | if (symtab_hdr->sh_info == 0) | |
2805 | continue; | |
2806 | ||
2807 | local_syms = htab->all_local_syms[bfd_indx]; | |
2808 | ||
2809 | /* Walk over each section attached to the input bfd. */ | |
2810 | for (section = input_bfd->sections; | |
2811 | section != NULL; | |
2812 | section = section->next) | |
2813 | { | |
2814 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; | |
2815 | ||
2816 | /* If there aren't any relocs, then there's nothing more | |
2817 | to do. */ | |
2818 | if ((section->flags & SEC_RELOC) == 0 | |
2819 | || section->reloc_count == 0) | |
2820 | continue; | |
2821 | ||
2822 | /* If this section is a link-once section that will be | |
2823 | discarded, then don't create any stubs. */ | |
2824 | if (section->output_section == NULL | |
2825 | || section->output_section->owner != output_bfd) | |
2826 | continue; | |
2827 | ||
2828 | /* Get the relocs. */ | |
2829 | internal_relocs | |
2830 | = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL, | |
2831 | info->keep_memory); | |
2832 | if (internal_relocs == NULL) | |
2833 | goto error_ret_free_local; | |
2834 | ||
2835 | /* Now examine each relocation. */ | |
2836 | irela = internal_relocs; | |
2837 | irelaend = irela + section->reloc_count; | |
2838 | for (; irela < irelaend; irela++) | |
2839 | { | |
2840 | unsigned int r_type, r_indx; | |
2841 | struct elf32_avr_stub_hash_entry *hsh; | |
2842 | asection *sym_sec; | |
2843 | bfd_vma sym_value; | |
2844 | bfd_vma destination; | |
2845 | struct elf_link_hash_entry *hh; | |
2846 | char *stub_name; | |
2847 | ||
2848 | r_type = ELF32_R_TYPE (irela->r_info); | |
2849 | r_indx = ELF32_R_SYM (irela->r_info); | |
2850 | ||
2851 | /* Only look for 16 bit GS relocs. No other reloc will need a | |
2852 | stub. */ | |
2853 | if (!((r_type == R_AVR_16_PM) | |
2854 | || (r_type == R_AVR_LO8_LDI_GS) | |
2855 | || (r_type == R_AVR_HI8_LDI_GS))) | |
2856 | continue; | |
2857 | ||
2858 | /* Now determine the call target, its name, value, | |
2859 | section. */ | |
2860 | sym_sec = NULL; | |
2861 | sym_value = 0; | |
2862 | destination = 0; | |
2863 | hh = NULL; | |
2864 | if (r_indx < symtab_hdr->sh_info) | |
2865 | { | |
2866 | /* It's a local symbol. */ | |
2867 | Elf_Internal_Sym *sym; | |
2868 | Elf_Internal_Shdr *hdr; | |
4fbb74a6 | 2869 | unsigned int shndx; |
28c9d252 NC |
2870 | |
2871 | sym = local_syms + r_indx; | |
28c9d252 NC |
2872 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) |
2873 | sym_value = sym->st_value; | |
4fbb74a6 AM |
2874 | shndx = sym->st_shndx; |
2875 | if (shndx < elf_numsections (input_bfd)) | |
2876 | { | |
2877 | hdr = elf_elfsections (input_bfd)[shndx]; | |
2878 | sym_sec = hdr->bfd_section; | |
2879 | destination = (sym_value + irela->r_addend | |
2880 | + sym_sec->output_offset | |
2881 | + sym_sec->output_section->vma); | |
2882 | } | |
28c9d252 NC |
2883 | } |
2884 | else | |
2885 | { | |
2886 | /* It's an external symbol. */ | |
2887 | int e_indx; | |
2888 | ||
2889 | e_indx = r_indx - symtab_hdr->sh_info; | |
2890 | hh = elf_sym_hashes (input_bfd)[e_indx]; | |
2891 | ||
2892 | while (hh->root.type == bfd_link_hash_indirect | |
2893 | || hh->root.type == bfd_link_hash_warning) | |
2894 | hh = (struct elf_link_hash_entry *) | |
2895 | (hh->root.u.i.link); | |
2896 | ||
2897 | if (hh->root.type == bfd_link_hash_defined | |
2898 | || hh->root.type == bfd_link_hash_defweak) | |
2899 | { | |
2900 | sym_sec = hh->root.u.def.section; | |
2901 | sym_value = hh->root.u.def.value; | |
2902 | if (sym_sec->output_section != NULL) | |
2903 | destination = (sym_value + irela->r_addend | |
2904 | + sym_sec->output_offset | |
2905 | + sym_sec->output_section->vma); | |
2906 | } | |
2907 | else if (hh->root.type == bfd_link_hash_undefweak) | |
2908 | { | |
2909 | if (! info->shared) | |
2910 | continue; | |
2911 | } | |
2912 | else if (hh->root.type == bfd_link_hash_undefined) | |
2913 | { | |
2914 | if (! (info->unresolved_syms_in_objects == RM_IGNORE | |
2915 | && (ELF_ST_VISIBILITY (hh->other) | |
2916 | == STV_DEFAULT))) | |
2917 | continue; | |
2918 | } | |
2919 | else | |
2920 | { | |
2921 | bfd_set_error (bfd_error_bad_value); | |
2922 | ||
2923 | error_ret_free_internal: | |
2924 | if (elf_section_data (section)->relocs == NULL) | |
2925 | free (internal_relocs); | |
2926 | goto error_ret_free_local; | |
2927 | } | |
2928 | } | |
2929 | ||
2930 | if (! avr_stub_is_required_for_16_bit_reloc | |
2931 | (destination - htab->vector_base)) | |
2932 | { | |
2933 | if (!is_prealloc_run) | |
2934 | /* We are having a reloc that does't need a stub. */ | |
2935 | continue; | |
2936 | ||
2937 | /* We don't right now know if a stub will be needed. | |
2938 | Let's rather be on the safe side. */ | |
2939 | } | |
2940 | ||
2941 | /* Get the name of this stub. */ | |
2942 | stub_name = avr_stub_name (sym_sec, sym_value, irela); | |
2943 | ||
2944 | if (!stub_name) | |
2945 | goto error_ret_free_internal; | |
2946 | ||
2947 | ||
2948 | hsh = avr_stub_hash_lookup (&htab->bstab, | |
2949 | stub_name, | |
2950 | FALSE, FALSE); | |
2951 | if (hsh != NULL) | |
2952 | { | |
2953 | /* The proper stub has already been created. Mark it | |
2954 | to be used and write the possibly changed destination | |
2955 | value. */ | |
2956 | hsh->is_actually_needed = TRUE; | |
2957 | hsh->target_value = destination; | |
2958 | free (stub_name); | |
2959 | continue; | |
2960 | } | |
2961 | ||
2962 | hsh = avr_add_stub (stub_name, htab); | |
2963 | if (hsh == NULL) | |
2964 | { | |
2965 | free (stub_name); | |
2966 | goto error_ret_free_internal; | |
2967 | } | |
2968 | ||
2969 | hsh->is_actually_needed = TRUE; | |
2970 | hsh->target_value = destination; | |
2971 | ||
2972 | if (debug_stubs) | |
2973 | printf ("Adding stub with destination 0x%x to the" | |
2974 | " hash table.\n", (unsigned int) destination); | |
2975 | if (debug_stubs) | |
2976 | printf ("(Pre-Alloc run: %i)\n", is_prealloc_run); | |
2977 | ||
2978 | stub_changed = TRUE; | |
2979 | } | |
2980 | ||
2981 | /* We're done with the internal relocs, free them. */ | |
2982 | if (elf_section_data (section)->relocs == NULL) | |
2983 | free (internal_relocs); | |
2984 | } | |
2985 | } | |
2986 | ||
2987 | /* Re-Calculate the number of needed stubs. */ | |
2988 | htab->stub_sec->size = 0; | |
2989 | bfd_hash_traverse (&htab->bstab, avr_size_one_stub, htab); | |
2990 | ||
2991 | if (!stub_changed) | |
2992 | break; | |
2993 | ||
2994 | stub_changed = FALSE; | |
2995 | } | |
2996 | ||
2997 | free (htab->all_local_syms); | |
2998 | return TRUE; | |
2999 | ||
3000 | error_ret_free_local: | |
3001 | free (htab->all_local_syms); | |
3002 | return FALSE; | |
3003 | } | |
3004 | ||
3005 | ||
3006 | /* Build all the stubs associated with the current output file. The | |
3007 | stubs are kept in a hash table attached to the main linker hash | |
3008 | table. We also set up the .plt entries for statically linked PIC | |
3009 | functions here. This function is called via hppaelf_finish in the | |
3010 | linker. */ | |
3011 | ||
3012 | bfd_boolean | |
3013 | elf32_avr_build_stubs (struct bfd_link_info *info) | |
3014 | { | |
3015 | asection *stub_sec; | |
3016 | struct bfd_hash_table *table; | |
3017 | struct elf32_avr_link_hash_table *htab; | |
3018 | bfd_size_type total_size = 0; | |
3019 | ||
3020 | htab = avr_link_hash_table (info); | |
64ee10b6 NC |
3021 | if (htab == NULL) |
3022 | return FALSE; | |
28c9d252 NC |
3023 | |
3024 | /* In case that there were several stub sections: */ | |
3025 | for (stub_sec = htab->stub_bfd->sections; | |
3026 | stub_sec != NULL; | |
3027 | stub_sec = stub_sec->next) | |
3028 | { | |
3029 | bfd_size_type size; | |
3030 | ||
3031 | /* Allocate memory to hold the linker stubs. */ | |
3032 | size = stub_sec->size; | |
3033 | total_size += size; | |
3034 | ||
3035 | stub_sec->contents = bfd_zalloc (htab->stub_bfd, size); | |
3036 | if (stub_sec->contents == NULL && size != 0) | |
3037 | return FALSE; | |
3038 | stub_sec->size = 0; | |
3039 | } | |
3040 | ||
3041 | /* Allocate memory for the adress mapping table. */ | |
3042 | htab->amt_entry_cnt = 0; | |
3043 | htab->amt_max_entry_cnt = total_size / 4; | |
3044 | htab->amt_stub_offsets = bfd_malloc (sizeof (bfd_vma) | |
3045 | * htab->amt_max_entry_cnt); | |
3046 | htab->amt_destination_addr = bfd_malloc (sizeof (bfd_vma) | |
3047 | * htab->amt_max_entry_cnt ); | |
3048 | ||
3049 | if (debug_stubs) | |
3050 | printf ("Allocating %i entries in the AMT\n", htab->amt_max_entry_cnt); | |
3051 | ||
3052 | /* Build the stubs as directed by the stub hash table. */ | |
3053 | table = &htab->bstab; | |
3054 | bfd_hash_traverse (table, avr_build_one_stub, info); | |
3055 | ||
3056 | if (debug_stubs) | |
3057 | printf ("Final Stub section Size: %i\n", (int) htab->stub_sec->size); | |
3058 | ||
3059 | return TRUE; | |
3060 | } | |
3061 | ||
adde6300 | 3062 | #define ELF_ARCH bfd_arch_avr |
ae95ffa6 | 3063 | #define ELF_TARGET_ID AVR_ELF_DATA |
adde6300 | 3064 | #define ELF_MACHINE_CODE EM_AVR |
aa4f99bb | 3065 | #define ELF_MACHINE_ALT1 EM_AVR_OLD |
adde6300 AM |
3066 | #define ELF_MAXPAGESIZE 1 |
3067 | ||
3068 | #define TARGET_LITTLE_SYM bfd_elf32_avr_vec | |
3069 | #define TARGET_LITTLE_NAME "elf32-avr" | |
3070 | ||
28c9d252 NC |
3071 | #define bfd_elf32_bfd_link_hash_table_create elf32_avr_link_hash_table_create |
3072 | #define bfd_elf32_bfd_link_hash_table_free elf32_avr_link_hash_table_free | |
3073 | ||
adde6300 AM |
3074 | #define elf_info_to_howto avr_info_to_howto_rela |
3075 | #define elf_info_to_howto_rel NULL | |
3076 | #define elf_backend_relocate_section elf32_avr_relocate_section | |
adde6300 | 3077 | #define elf_backend_can_gc_sections 1 |
f0fe0e16 | 3078 | #define elf_backend_rela_normal 1 |
adde6300 AM |
3079 | #define elf_backend_final_write_processing \ |
3080 | bfd_elf_avr_final_write_processing | |
3081 | #define elf_backend_object_p elf32_avr_object_p | |
3082 | ||
df406460 NC |
3083 | #define bfd_elf32_bfd_relax_section elf32_avr_relax_section |
3084 | #define bfd_elf32_bfd_get_relocated_section_contents \ | |
3085 | elf32_avr_get_relocated_section_contents | |
3086 | ||
adde6300 | 3087 | #include "elf32-target.h" |