Commit | Line | Data |
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adde6300 | 1 | /* AVR-specific support for 32-bit ELF |
64ee10b6 | 2 | Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2006, 2007 |
b2a8e766 | 3 | Free Software Foundation, Inc. |
adde6300 AM |
4 | Contributed by Denis Chertykov <denisc@overta.ru> |
5 | ||
750bce0e | 6 | This file is part of BFD, the Binary File Descriptor library. |
adde6300 | 7 | |
750bce0e NC |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
adde6300 | 12 | |
750bce0e NC |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
adde6300 | 17 | |
750bce0e NC |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software | |
4cdc7696 | 20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, |
df406460 | 21 | Boston, MA 02110-1301, USA. */ |
adde6300 | 22 | |
adde6300 AM |
23 | #include "bfd.h" |
24 | #include "sysdep.h" | |
25 | #include "libbfd.h" | |
26 | #include "elf-bfd.h" | |
27 | #include "elf/avr.h" | |
28c9d252 NC |
28 | #include "elf32-avr.h" |
29 | ||
30 | /* Enable debugging printout at stdout with this variable. */ | |
31 | static bfd_boolean debug_relax = FALSE; | |
32 | ||
33 | /* Enable debugging printout at stdout with this variable. */ | |
34 | static bfd_boolean debug_stubs = FALSE; | |
35 | ||
36 | /* Hash table initialization and handling. Code is taken from the hppa port | |
37 | and adapted to the needs of AVR. */ | |
38 | ||
39 | /* We use two hash tables to hold information for linking avr objects. | |
40 | ||
41 | The first is the elf32_avr_link_hash_tablse which is derived from the | |
42 | stanard ELF linker hash table. We use this as a place to attach the other | |
43 | hash table and some static information. | |
44 | ||
45 | The second is the stub hash table which is derived from the base BFD | |
46 | hash table. The stub hash table holds the information on the linker | |
47 | stubs. */ | |
48 | ||
49 | struct elf32_avr_stub_hash_entry | |
50 | { | |
51 | /* Base hash table entry structure. */ | |
52 | struct bfd_hash_entry bh_root; | |
53 | ||
54 | /* Offset within stub_sec of the beginning of this stub. */ | |
55 | bfd_vma stub_offset; | |
56 | ||
57 | /* Given the symbol's value and its section we can determine its final | |
58 | value when building the stubs (so the stub knows where to jump). */ | |
59 | bfd_vma target_value; | |
60 | ||
61 | /* This way we could mark stubs to be no longer necessary. */ | |
62 | bfd_boolean is_actually_needed; | |
63 | }; | |
64 | ||
65 | struct elf32_avr_link_hash_table | |
66 | { | |
67 | /* The main hash table. */ | |
68 | struct elf_link_hash_table etab; | |
69 | ||
70 | /* The stub hash table. */ | |
71 | struct bfd_hash_table bstab; | |
72 | ||
73 | bfd_boolean no_stubs; | |
74 | ||
75 | /* Linker stub bfd. */ | |
76 | bfd *stub_bfd; | |
77 | ||
78 | /* The stub section. */ | |
79 | asection *stub_sec; | |
80 | ||
81 | /* Usually 0, unless we are generating code for a bootloader. Will | |
82 | be initialized by elf32_avr_size_stubs to the vma offset of the | |
83 | output section associated with the stub section. */ | |
84 | bfd_vma vector_base; | |
85 | ||
86 | /* Assorted information used by elf32_avr_size_stubs. */ | |
87 | unsigned int bfd_count; | |
88 | int top_index; | |
89 | asection ** input_list; | |
90 | Elf_Internal_Sym ** all_local_syms; | |
91 | ||
92 | /* Tables for mapping vma beyond the 128k boundary to the address of the | |
93 | corresponding stub. (AMT) | |
94 | "amt_max_entry_cnt" reflects the number of entries that memory is allocated | |
95 | for in the "amt_stub_offsets" and "amt_destination_addr" arrays. | |
96 | "amt_entry_cnt" informs how many of these entries actually contain | |
97 | useful data. */ | |
98 | unsigned int amt_entry_cnt; | |
99 | unsigned int amt_max_entry_cnt; | |
100 | bfd_vma * amt_stub_offsets; | |
101 | bfd_vma * amt_destination_addr; | |
102 | }; | |
103 | ||
104 | /* Various hash macros and functions. */ | |
105 | #define avr_link_hash_table(p) \ | |
64ee10b6 NC |
106 | /* PR 3874: Check that we have an AVR style hash table before using it. */\ |
107 | ((p)->hash->table.newfunc != elf32_avr_link_hash_newfunc ? NULL : \ | |
108 | ((struct elf32_avr_link_hash_table *) ((p)->hash))) | |
28c9d252 NC |
109 | |
110 | #define avr_stub_hash_entry(ent) \ | |
111 | ((struct elf32_avr_stub_hash_entry *)(ent)) | |
112 | ||
113 | #define avr_stub_hash_lookup(table, string, create, copy) \ | |
114 | ((struct elf32_avr_stub_hash_entry *) \ | |
115 | bfd_hash_lookup ((table), (string), (create), (copy))) | |
adde6300 | 116 | |
adde6300 AM |
117 | static reloc_howto_type elf_avr_howto_table[] = |
118 | { | |
119 | HOWTO (R_AVR_NONE, /* type */ | |
120 | 0, /* rightshift */ | |
121 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
122 | 32, /* bitsize */ | |
b34976b6 | 123 | FALSE, /* pc_relative */ |
adde6300 AM |
124 | 0, /* bitpos */ |
125 | complain_overflow_bitfield, /* complain_on_overflow */ | |
126 | bfd_elf_generic_reloc, /* special_function */ | |
127 | "R_AVR_NONE", /* name */ | |
b34976b6 | 128 | FALSE, /* partial_inplace */ |
adde6300 AM |
129 | 0, /* src_mask */ |
130 | 0, /* dst_mask */ | |
b34976b6 | 131 | FALSE), /* pcrel_offset */ |
adde6300 AM |
132 | |
133 | HOWTO (R_AVR_32, /* type */ | |
134 | 0, /* rightshift */ | |
135 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
136 | 32, /* bitsize */ | |
b34976b6 | 137 | FALSE, /* pc_relative */ |
adde6300 AM |
138 | 0, /* bitpos */ |
139 | complain_overflow_bitfield, /* complain_on_overflow */ | |
140 | bfd_elf_generic_reloc, /* special_function */ | |
141 | "R_AVR_32", /* name */ | |
b34976b6 | 142 | FALSE, /* partial_inplace */ |
adde6300 AM |
143 | 0xffffffff, /* src_mask */ |
144 | 0xffffffff, /* dst_mask */ | |
b34976b6 | 145 | FALSE), /* pcrel_offset */ |
adde6300 AM |
146 | |
147 | /* A 7 bit PC relative relocation. */ | |
148 | HOWTO (R_AVR_7_PCREL, /* type */ | |
149 | 1, /* rightshift */ | |
150 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
151 | 7, /* bitsize */ | |
b34976b6 | 152 | TRUE, /* pc_relative */ |
adde6300 AM |
153 | 3, /* bitpos */ |
154 | complain_overflow_bitfield, /* complain_on_overflow */ | |
155 | bfd_elf_generic_reloc, /* special_function */ | |
156 | "R_AVR_7_PCREL", /* name */ | |
b34976b6 | 157 | FALSE, /* partial_inplace */ |
adde6300 AM |
158 | 0xffff, /* src_mask */ |
159 | 0xffff, /* dst_mask */ | |
b34976b6 | 160 | TRUE), /* pcrel_offset */ |
adde6300 AM |
161 | |
162 | /* A 13 bit PC relative relocation. */ | |
163 | HOWTO (R_AVR_13_PCREL, /* type */ | |
164 | 1, /* rightshift */ | |
165 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
166 | 13, /* bitsize */ | |
b34976b6 | 167 | TRUE, /* pc_relative */ |
adde6300 AM |
168 | 0, /* bitpos */ |
169 | complain_overflow_bitfield, /* complain_on_overflow */ | |
170 | bfd_elf_generic_reloc, /* special_function */ | |
171 | "R_AVR_13_PCREL", /* name */ | |
b34976b6 | 172 | FALSE, /* partial_inplace */ |
adde6300 AM |
173 | 0xfff, /* src_mask */ |
174 | 0xfff, /* dst_mask */ | |
b34976b6 | 175 | TRUE), /* pcrel_offset */ |
adde6300 AM |
176 | |
177 | /* A 16 bit absolute relocation. */ | |
178 | HOWTO (R_AVR_16, /* type */ | |
179 | 0, /* rightshift */ | |
180 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
181 | 16, /* bitsize */ | |
b34976b6 | 182 | FALSE, /* pc_relative */ |
adde6300 AM |
183 | 0, /* bitpos */ |
184 | complain_overflow_dont, /* complain_on_overflow */ | |
185 | bfd_elf_generic_reloc, /* special_function */ | |
186 | "R_AVR_16", /* name */ | |
b34976b6 | 187 | FALSE, /* partial_inplace */ |
adde6300 AM |
188 | 0xffff, /* src_mask */ |
189 | 0xffff, /* dst_mask */ | |
b34976b6 | 190 | FALSE), /* pcrel_offset */ |
adde6300 | 191 | |
28c9d252 NC |
192 | /* A 16 bit absolute relocation for command address |
193 | Will be changed when linker stubs are needed. */ | |
adde6300 AM |
194 | HOWTO (R_AVR_16_PM, /* type */ |
195 | 1, /* rightshift */ | |
196 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
197 | 16, /* bitsize */ | |
b34976b6 | 198 | FALSE, /* pc_relative */ |
adde6300 AM |
199 | 0, /* bitpos */ |
200 | complain_overflow_bitfield, /* complain_on_overflow */ | |
201 | bfd_elf_generic_reloc, /* special_function */ | |
202 | "R_AVR_16_PM", /* name */ | |
b34976b6 | 203 | FALSE, /* partial_inplace */ |
adde6300 AM |
204 | 0xffff, /* src_mask */ |
205 | 0xffff, /* dst_mask */ | |
b34976b6 | 206 | FALSE), /* pcrel_offset */ |
adde6300 AM |
207 | /* A low 8 bit absolute relocation of 16 bit address. |
208 | For LDI command. */ | |
209 | HOWTO (R_AVR_LO8_LDI, /* type */ | |
210 | 0, /* rightshift */ | |
211 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
212 | 8, /* bitsize */ | |
b34976b6 | 213 | FALSE, /* pc_relative */ |
adde6300 AM |
214 | 0, /* bitpos */ |
215 | complain_overflow_dont, /* complain_on_overflow */ | |
216 | bfd_elf_generic_reloc, /* special_function */ | |
217 | "R_AVR_LO8_LDI", /* name */ | |
b34976b6 | 218 | FALSE, /* partial_inplace */ |
adde6300 AM |
219 | 0xffff, /* src_mask */ |
220 | 0xffff, /* dst_mask */ | |
b34976b6 | 221 | FALSE), /* pcrel_offset */ |
adde6300 AM |
222 | /* A high 8 bit absolute relocation of 16 bit address. |
223 | For LDI command. */ | |
224 | HOWTO (R_AVR_HI8_LDI, /* type */ | |
225 | 8, /* rightshift */ | |
226 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
227 | 8, /* bitsize */ | |
b34976b6 | 228 | FALSE, /* pc_relative */ |
adde6300 AM |
229 | 0, /* bitpos */ |
230 | complain_overflow_dont, /* complain_on_overflow */ | |
231 | bfd_elf_generic_reloc, /* special_function */ | |
232 | "R_AVR_HI8_LDI", /* name */ | |
b34976b6 | 233 | FALSE, /* partial_inplace */ |
adde6300 AM |
234 | 0xffff, /* src_mask */ |
235 | 0xffff, /* dst_mask */ | |
b34976b6 | 236 | FALSE), /* pcrel_offset */ |
adde6300 | 237 | /* A high 6 bit absolute relocation of 22 bit address. |
4cdc7696 | 238 | For LDI command. As well second most significant 8 bit value of |
df406460 | 239 | a 32 bit link-time constant. */ |
adde6300 AM |
240 | HOWTO (R_AVR_HH8_LDI, /* type */ |
241 | 16, /* rightshift */ | |
242 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
243 | 8, /* bitsize */ | |
b34976b6 | 244 | FALSE, /* pc_relative */ |
adde6300 AM |
245 | 0, /* bitpos */ |
246 | complain_overflow_dont, /* complain_on_overflow */ | |
247 | bfd_elf_generic_reloc, /* special_function */ | |
248 | "R_AVR_HH8_LDI", /* name */ | |
b34976b6 | 249 | FALSE, /* partial_inplace */ |
adde6300 AM |
250 | 0xffff, /* src_mask */ |
251 | 0xffff, /* dst_mask */ | |
b34976b6 | 252 | FALSE), /* pcrel_offset */ |
adde6300 AM |
253 | /* A negative low 8 bit absolute relocation of 16 bit address. |
254 | For LDI command. */ | |
255 | HOWTO (R_AVR_LO8_LDI_NEG, /* type */ | |
256 | 0, /* rightshift */ | |
257 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
258 | 8, /* bitsize */ | |
b34976b6 | 259 | FALSE, /* pc_relative */ |
adde6300 AM |
260 | 0, /* bitpos */ |
261 | complain_overflow_dont, /* complain_on_overflow */ | |
262 | bfd_elf_generic_reloc, /* special_function */ | |
263 | "R_AVR_LO8_LDI_NEG", /* name */ | |
b34976b6 | 264 | FALSE, /* partial_inplace */ |
adde6300 AM |
265 | 0xffff, /* src_mask */ |
266 | 0xffff, /* dst_mask */ | |
b34976b6 | 267 | FALSE), /* pcrel_offset */ |
df406460 | 268 | /* A negative high 8 bit absolute relocation of 16 bit address. |
adde6300 AM |
269 | For LDI command. */ |
270 | HOWTO (R_AVR_HI8_LDI_NEG, /* type */ | |
271 | 8, /* rightshift */ | |
272 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
273 | 8, /* bitsize */ | |
b34976b6 | 274 | FALSE, /* pc_relative */ |
adde6300 AM |
275 | 0, /* bitpos */ |
276 | complain_overflow_dont, /* complain_on_overflow */ | |
277 | bfd_elf_generic_reloc, /* special_function */ | |
278 | "R_AVR_HI8_LDI_NEG", /* name */ | |
b34976b6 | 279 | FALSE, /* partial_inplace */ |
adde6300 AM |
280 | 0xffff, /* src_mask */ |
281 | 0xffff, /* dst_mask */ | |
b34976b6 | 282 | FALSE), /* pcrel_offset */ |
df406460 | 283 | /* A negative high 6 bit absolute relocation of 22 bit address. |
adde6300 AM |
284 | For LDI command. */ |
285 | HOWTO (R_AVR_HH8_LDI_NEG, /* type */ | |
286 | 16, /* rightshift */ | |
287 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
288 | 8, /* bitsize */ | |
b34976b6 | 289 | FALSE, /* pc_relative */ |
adde6300 AM |
290 | 0, /* bitpos */ |
291 | complain_overflow_dont, /* complain_on_overflow */ | |
292 | bfd_elf_generic_reloc, /* special_function */ | |
293 | "R_AVR_HH8_LDI_NEG", /* name */ | |
b34976b6 | 294 | FALSE, /* partial_inplace */ |
adde6300 AM |
295 | 0xffff, /* src_mask */ |
296 | 0xffff, /* dst_mask */ | |
b34976b6 | 297 | FALSE), /* pcrel_offset */ |
adde6300 | 298 | /* A low 8 bit absolute relocation of 24 bit program memory address. |
28c9d252 | 299 | For LDI command. Will not be changed when linker stubs are needed. */ |
adde6300 AM |
300 | HOWTO (R_AVR_LO8_LDI_PM, /* type */ |
301 | 1, /* rightshift */ | |
302 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
303 | 8, /* bitsize */ | |
b34976b6 | 304 | FALSE, /* pc_relative */ |
adde6300 AM |
305 | 0, /* bitpos */ |
306 | complain_overflow_dont, /* complain_on_overflow */ | |
307 | bfd_elf_generic_reloc, /* special_function */ | |
308 | "R_AVR_LO8_LDI_PM", /* name */ | |
b34976b6 | 309 | FALSE, /* partial_inplace */ |
adde6300 AM |
310 | 0xffff, /* src_mask */ |
311 | 0xffff, /* dst_mask */ | |
b34976b6 | 312 | FALSE), /* pcrel_offset */ |
28c9d252 NC |
313 | /* A low 8 bit absolute relocation of 24 bit program memory address. |
314 | For LDI command. Will not be changed when linker stubs are needed. */ | |
adde6300 AM |
315 | HOWTO (R_AVR_HI8_LDI_PM, /* type */ |
316 | 9, /* rightshift */ | |
317 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
318 | 8, /* bitsize */ | |
b34976b6 | 319 | FALSE, /* pc_relative */ |
adde6300 AM |
320 | 0, /* bitpos */ |
321 | complain_overflow_dont, /* complain_on_overflow */ | |
322 | bfd_elf_generic_reloc, /* special_function */ | |
323 | "R_AVR_HI8_LDI_PM", /* name */ | |
b34976b6 | 324 | FALSE, /* partial_inplace */ |
adde6300 AM |
325 | 0xffff, /* src_mask */ |
326 | 0xffff, /* dst_mask */ | |
b34976b6 | 327 | FALSE), /* pcrel_offset */ |
28c9d252 NC |
328 | /* A low 8 bit absolute relocation of 24 bit program memory address. |
329 | For LDI command. Will not be changed when linker stubs are needed. */ | |
adde6300 AM |
330 | HOWTO (R_AVR_HH8_LDI_PM, /* type */ |
331 | 17, /* rightshift */ | |
332 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
333 | 8, /* bitsize */ | |
b34976b6 | 334 | FALSE, /* pc_relative */ |
adde6300 AM |
335 | 0, /* bitpos */ |
336 | complain_overflow_dont, /* complain_on_overflow */ | |
337 | bfd_elf_generic_reloc, /* special_function */ | |
338 | "R_AVR_HH8_LDI_PM", /* name */ | |
b34976b6 | 339 | FALSE, /* partial_inplace */ |
adde6300 AM |
340 | 0xffff, /* src_mask */ |
341 | 0xffff, /* dst_mask */ | |
b34976b6 | 342 | FALSE), /* pcrel_offset */ |
28c9d252 NC |
343 | /* A low 8 bit absolute relocation of 24 bit program memory address. |
344 | For LDI command. Will not be changed when linker stubs are needed. */ | |
adde6300 AM |
345 | HOWTO (R_AVR_LO8_LDI_PM_NEG, /* type */ |
346 | 1, /* rightshift */ | |
347 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
348 | 8, /* bitsize */ | |
b34976b6 | 349 | FALSE, /* pc_relative */ |
adde6300 AM |
350 | 0, /* bitpos */ |
351 | complain_overflow_dont, /* complain_on_overflow */ | |
352 | bfd_elf_generic_reloc, /* special_function */ | |
353 | "R_AVR_LO8_LDI_PM_NEG", /* name */ | |
b34976b6 | 354 | FALSE, /* partial_inplace */ |
adde6300 AM |
355 | 0xffff, /* src_mask */ |
356 | 0xffff, /* dst_mask */ | |
b34976b6 | 357 | FALSE), /* pcrel_offset */ |
28c9d252 NC |
358 | /* A low 8 bit absolute relocation of 24 bit program memory address. |
359 | For LDI command. Will not be changed when linker stubs are needed. */ | |
adde6300 AM |
360 | HOWTO (R_AVR_HI8_LDI_PM_NEG, /* type */ |
361 | 9, /* rightshift */ | |
362 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
363 | 8, /* bitsize */ | |
b34976b6 | 364 | FALSE, /* pc_relative */ |
adde6300 AM |
365 | 0, /* bitpos */ |
366 | complain_overflow_dont, /* complain_on_overflow */ | |
367 | bfd_elf_generic_reloc, /* special_function */ | |
368 | "R_AVR_HI8_LDI_PM_NEG", /* name */ | |
b34976b6 | 369 | FALSE, /* partial_inplace */ |
adde6300 AM |
370 | 0xffff, /* src_mask */ |
371 | 0xffff, /* dst_mask */ | |
b34976b6 | 372 | FALSE), /* pcrel_offset */ |
28c9d252 NC |
373 | /* A low 8 bit absolute relocation of 24 bit program memory address. |
374 | For LDI command. Will not be changed when linker stubs are needed. */ | |
adde6300 AM |
375 | HOWTO (R_AVR_HH8_LDI_PM_NEG, /* type */ |
376 | 17, /* rightshift */ | |
377 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
378 | 8, /* bitsize */ | |
b34976b6 | 379 | FALSE, /* pc_relative */ |
adde6300 AM |
380 | 0, /* bitpos */ |
381 | complain_overflow_dont, /* complain_on_overflow */ | |
382 | bfd_elf_generic_reloc, /* special_function */ | |
383 | "R_AVR_HH8_LDI_PM_NEG", /* name */ | |
b34976b6 | 384 | FALSE, /* partial_inplace */ |
adde6300 AM |
385 | 0xffff, /* src_mask */ |
386 | 0xffff, /* dst_mask */ | |
b34976b6 | 387 | FALSE), /* pcrel_offset */ |
adde6300 AM |
388 | /* Relocation for CALL command in ATmega. */ |
389 | HOWTO (R_AVR_CALL, /* type */ | |
390 | 1, /* rightshift */ | |
391 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
392 | 23, /* bitsize */ | |
b34976b6 | 393 | FALSE, /* pc_relative */ |
adde6300 | 394 | 0, /* bitpos */ |
750bce0e | 395 | complain_overflow_dont,/* complain_on_overflow */ |
adde6300 AM |
396 | bfd_elf_generic_reloc, /* special_function */ |
397 | "R_AVR_CALL", /* name */ | |
b34976b6 | 398 | FALSE, /* partial_inplace */ |
adde6300 AM |
399 | 0xffffffff, /* src_mask */ |
400 | 0xffffffff, /* dst_mask */ | |
750bce0e NC |
401 | FALSE), /* pcrel_offset */ |
402 | /* A 16 bit absolute relocation of 16 bit address. | |
403 | For LDI command. */ | |
404 | HOWTO (R_AVR_LDI, /* type */ | |
405 | 0, /* rightshift */ | |
406 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
407 | 16, /* bitsize */ | |
408 | FALSE, /* pc_relative */ | |
409 | 0, /* bitpos */ | |
410 | complain_overflow_dont,/* complain_on_overflow */ | |
411 | bfd_elf_generic_reloc, /* special_function */ | |
412 | "R_AVR_LDI", /* name */ | |
413 | FALSE, /* partial_inplace */ | |
414 | 0xffff, /* src_mask */ | |
415 | 0xffff, /* dst_mask */ | |
416 | FALSE), /* pcrel_offset */ | |
417 | /* A 6 bit absolute relocation of 6 bit offset. | |
418 | For ldd/sdd command. */ | |
419 | HOWTO (R_AVR_6, /* type */ | |
420 | 0, /* rightshift */ | |
421 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
422 | 6, /* bitsize */ | |
423 | FALSE, /* pc_relative */ | |
424 | 0, /* bitpos */ | |
425 | complain_overflow_dont,/* complain_on_overflow */ | |
426 | bfd_elf_generic_reloc, /* special_function */ | |
427 | "R_AVR_6", /* name */ | |
428 | FALSE, /* partial_inplace */ | |
429 | 0xffff, /* src_mask */ | |
430 | 0xffff, /* dst_mask */ | |
431 | FALSE), /* pcrel_offset */ | |
432 | /* A 6 bit absolute relocation of 6 bit offset. | |
433 | For sbiw/adiw command. */ | |
434 | HOWTO (R_AVR_6_ADIW, /* type */ | |
435 | 0, /* rightshift */ | |
436 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
437 | 6, /* bitsize */ | |
438 | FALSE, /* pc_relative */ | |
439 | 0, /* bitpos */ | |
440 | complain_overflow_dont,/* complain_on_overflow */ | |
441 | bfd_elf_generic_reloc, /* special_function */ | |
442 | "R_AVR_6_ADIW", /* name */ | |
443 | FALSE, /* partial_inplace */ | |
444 | 0xffff, /* src_mask */ | |
445 | 0xffff, /* dst_mask */ | |
df406460 NC |
446 | FALSE), /* pcrel_offset */ |
447 | /* Most significant 8 bit value of a 32 bit link-time constant. */ | |
448 | HOWTO (R_AVR_MS8_LDI, /* type */ | |
449 | 24, /* rightshift */ | |
450 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
451 | 8, /* bitsize */ | |
452 | FALSE, /* pc_relative */ | |
453 | 0, /* bitpos */ | |
454 | complain_overflow_dont, /* complain_on_overflow */ | |
455 | bfd_elf_generic_reloc, /* special_function */ | |
456 | "R_AVR_MS8_LDI", /* name */ | |
457 | FALSE, /* partial_inplace */ | |
458 | 0xffff, /* src_mask */ | |
459 | 0xffff, /* dst_mask */ | |
460 | FALSE), /* pcrel_offset */ | |
461 | /* Negative most significant 8 bit value of a 32 bit link-time constant. */ | |
462 | HOWTO (R_AVR_MS8_LDI_NEG, /* type */ | |
463 | 24, /* rightshift */ | |
464 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
465 | 8, /* bitsize */ | |
466 | FALSE, /* pc_relative */ | |
467 | 0, /* bitpos */ | |
468 | complain_overflow_dont, /* complain_on_overflow */ | |
469 | bfd_elf_generic_reloc, /* special_function */ | |
470 | "R_AVR_MS8_LDI_NEG", /* name */ | |
471 | FALSE, /* partial_inplace */ | |
472 | 0xffff, /* src_mask */ | |
473 | 0xffff, /* dst_mask */ | |
28c9d252 NC |
474 | FALSE), /* pcrel_offset */ |
475 | /* A low 8 bit absolute relocation of 24 bit program memory address. | |
476 | For LDI command. Will be changed when linker stubs are needed. */ | |
477 | HOWTO (R_AVR_LO8_LDI_GS, /* type */ | |
478 | 1, /* rightshift */ | |
479 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
480 | 8, /* bitsize */ | |
481 | FALSE, /* pc_relative */ | |
482 | 0, /* bitpos */ | |
483 | complain_overflow_dont, /* complain_on_overflow */ | |
484 | bfd_elf_generic_reloc, /* special_function */ | |
485 | "R_AVR_LO8_LDI_GS", /* name */ | |
486 | FALSE, /* partial_inplace */ | |
487 | 0xffff, /* src_mask */ | |
488 | 0xffff, /* dst_mask */ | |
489 | FALSE), /* pcrel_offset */ | |
490 | /* A low 8 bit absolute relocation of 24 bit program memory address. | |
491 | For LDI command. Will be changed when linker stubs are needed. */ | |
492 | HOWTO (R_AVR_HI8_LDI_GS, /* type */ | |
493 | 9, /* rightshift */ | |
494 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
495 | 8, /* bitsize */ | |
496 | FALSE, /* pc_relative */ | |
497 | 0, /* bitpos */ | |
498 | complain_overflow_dont, /* complain_on_overflow */ | |
499 | bfd_elf_generic_reloc, /* special_function */ | |
500 | "R_AVR_HI8_LDI_GS", /* name */ | |
501 | FALSE, /* partial_inplace */ | |
502 | 0xffff, /* src_mask */ | |
503 | 0xffff, /* dst_mask */ | |
504 | FALSE) /* pcrel_offset */ | |
adde6300 AM |
505 | }; |
506 | ||
507 | /* Map BFD reloc types to AVR ELF reloc types. */ | |
508 | ||
509 | struct avr_reloc_map | |
510 | { | |
511 | bfd_reloc_code_real_type bfd_reloc_val; | |
512 | unsigned int elf_reloc_val; | |
513 | }; | |
514 | ||
28c9d252 | 515 | static const struct avr_reloc_map avr_reloc_map[] = |
adde6300 AM |
516 | { |
517 | { BFD_RELOC_NONE, R_AVR_NONE }, | |
518 | { BFD_RELOC_32, R_AVR_32 }, | |
519 | { BFD_RELOC_AVR_7_PCREL, R_AVR_7_PCREL }, | |
520 | { BFD_RELOC_AVR_13_PCREL, R_AVR_13_PCREL }, | |
521 | { BFD_RELOC_16, R_AVR_16 }, | |
522 | { BFD_RELOC_AVR_16_PM, R_AVR_16_PM }, | |
523 | { BFD_RELOC_AVR_LO8_LDI, R_AVR_LO8_LDI}, | |
524 | { BFD_RELOC_AVR_HI8_LDI, R_AVR_HI8_LDI }, | |
525 | { BFD_RELOC_AVR_HH8_LDI, R_AVR_HH8_LDI }, | |
df406460 | 526 | { BFD_RELOC_AVR_MS8_LDI, R_AVR_MS8_LDI }, |
adde6300 AM |
527 | { BFD_RELOC_AVR_LO8_LDI_NEG, R_AVR_LO8_LDI_NEG }, |
528 | { BFD_RELOC_AVR_HI8_LDI_NEG, R_AVR_HI8_LDI_NEG }, | |
529 | { BFD_RELOC_AVR_HH8_LDI_NEG, R_AVR_HH8_LDI_NEG }, | |
df406460 | 530 | { BFD_RELOC_AVR_MS8_LDI_NEG, R_AVR_MS8_LDI_NEG }, |
adde6300 | 531 | { BFD_RELOC_AVR_LO8_LDI_PM, R_AVR_LO8_LDI_PM }, |
28c9d252 | 532 | { BFD_RELOC_AVR_LO8_LDI_GS, R_AVR_LO8_LDI_GS }, |
adde6300 | 533 | { BFD_RELOC_AVR_HI8_LDI_PM, R_AVR_HI8_LDI_PM }, |
28c9d252 | 534 | { BFD_RELOC_AVR_HI8_LDI_GS, R_AVR_HI8_LDI_GS }, |
adde6300 AM |
535 | { BFD_RELOC_AVR_HH8_LDI_PM, R_AVR_HH8_LDI_PM }, |
536 | { BFD_RELOC_AVR_LO8_LDI_PM_NEG, R_AVR_LO8_LDI_PM_NEG }, | |
537 | { BFD_RELOC_AVR_HI8_LDI_PM_NEG, R_AVR_HI8_LDI_PM_NEG }, | |
538 | { BFD_RELOC_AVR_HH8_LDI_PM_NEG, R_AVR_HH8_LDI_PM_NEG }, | |
750bce0e NC |
539 | { BFD_RELOC_AVR_CALL, R_AVR_CALL }, |
540 | { BFD_RELOC_AVR_LDI, R_AVR_LDI }, | |
541 | { BFD_RELOC_AVR_6, R_AVR_6 }, | |
542 | { BFD_RELOC_AVR_6_ADIW, R_AVR_6_ADIW } | |
adde6300 AM |
543 | }; |
544 | ||
df406460 | 545 | /* Meant to be filled one day with the wrap around address for the |
4cdc7696 | 546 | specific device. I.e. should get the value 0x4000 for 16k devices, |
df406460 | 547 | 0x8000 for 32k devices and so on. |
4cdc7696 | 548 | |
df406460 | 549 | We initialize it here with a value of 0x1000000 resulting in |
4cdc7696 NC |
550 | that we will never suggest a wrap-around jump during relaxation. |
551 | The logic of the source code later on assumes that in | |
df406460 | 552 | avr_pc_wrap_around one single bit is set. */ |
28c9d252 NC |
553 | static bfd_vma avr_pc_wrap_around = 0x10000000; |
554 | ||
555 | /* If this variable holds a value different from zero, the linker relaxation | |
556 | machine will try to optimize call/ret sequences by a single jump | |
557 | instruction. This option could be switched off by a linker switch. */ | |
558 | static int avr_replace_call_ret_sequences = 1; | |
559 | \f | |
560 | /* Initialize an entry in the stub hash table. */ | |
561 | ||
562 | static struct bfd_hash_entry * | |
563 | stub_hash_newfunc (struct bfd_hash_entry *entry, | |
564 | struct bfd_hash_table *table, | |
565 | const char *string) | |
566 | { | |
567 | /* Allocate the structure if it has not already been allocated by a | |
568 | subclass. */ | |
569 | if (entry == NULL) | |
570 | { | |
571 | entry = bfd_hash_allocate (table, | |
572 | sizeof (struct elf32_avr_stub_hash_entry)); | |
573 | if (entry == NULL) | |
574 | return entry; | |
575 | } | |
576 | ||
577 | /* Call the allocation method of the superclass. */ | |
578 | entry = bfd_hash_newfunc (entry, table, string); | |
579 | if (entry != NULL) | |
580 | { | |
581 | struct elf32_avr_stub_hash_entry *hsh; | |
582 | ||
583 | /* Initialize the local fields. */ | |
584 | hsh = avr_stub_hash_entry (entry); | |
585 | hsh->stub_offset = 0; | |
586 | hsh->target_value = 0; | |
587 | } | |
588 | ||
589 | return entry; | |
590 | } | |
591 | ||
64ee10b6 NC |
592 | /* This function is just a straight passthrough to the real |
593 | function in linker.c. Its prupose is so that its address | |
594 | can be compared inside the avr_link_hash_table macro. */ | |
595 | ||
596 | static struct bfd_hash_entry * | |
597 | elf32_avr_link_hash_newfunc (struct bfd_hash_entry * entry, | |
598 | struct bfd_hash_table * table, | |
599 | const char * string) | |
600 | { | |
601 | return _bfd_elf_link_hash_newfunc (entry, table, string); | |
602 | } | |
603 | ||
28c9d252 NC |
604 | /* Create the derived linker hash table. The AVR ELF port uses the derived |
605 | hash table to keep information specific to the AVR ELF linker (without | |
606 | using static variables). */ | |
607 | ||
608 | static struct bfd_link_hash_table * | |
609 | elf32_avr_link_hash_table_create (bfd *abfd) | |
610 | { | |
611 | struct elf32_avr_link_hash_table *htab; | |
612 | bfd_size_type amt = sizeof (*htab); | |
613 | ||
614 | htab = bfd_malloc (amt); | |
615 | if (htab == NULL) | |
616 | return NULL; | |
617 | ||
618 | if (!_bfd_elf_link_hash_table_init (&htab->etab, abfd, | |
64ee10b6 | 619 | elf32_avr_link_hash_newfunc, |
28c9d252 NC |
620 | sizeof (struct elf_link_hash_entry))) |
621 | { | |
622 | free (htab); | |
623 | return NULL; | |
624 | } | |
625 | ||
626 | /* Init the stub hash table too. */ | |
627 | if (!bfd_hash_table_init (&htab->bstab, stub_hash_newfunc, | |
628 | sizeof (struct elf32_avr_stub_hash_entry))) | |
629 | return NULL; | |
4cdc7696 | 630 | |
28c9d252 NC |
631 | htab->stub_bfd = NULL; |
632 | htab->stub_sec = NULL; | |
633 | ||
634 | /* Initialize the address mapping table. */ | |
635 | htab->amt_stub_offsets = NULL; | |
636 | htab->amt_destination_addr = NULL; | |
637 | htab->amt_entry_cnt = 0; | |
638 | htab->amt_max_entry_cnt = 0; | |
639 | ||
640 | return &htab->etab.root; | |
641 | } | |
642 | ||
643 | /* Free the derived linker hash table. */ | |
644 | ||
645 | static void | |
646 | elf32_avr_link_hash_table_free (struct bfd_link_hash_table *btab) | |
647 | { | |
648 | struct elf32_avr_link_hash_table *htab | |
649 | = (struct elf32_avr_link_hash_table *) btab; | |
650 | ||
651 | /* Free the address mapping table. */ | |
652 | if (htab->amt_stub_offsets != NULL) | |
653 | free (htab->amt_stub_offsets); | |
654 | if (htab->amt_destination_addr != NULL) | |
655 | free (htab->amt_destination_addr); | |
656 | ||
657 | bfd_hash_table_free (&htab->bstab); | |
658 | _bfd_generic_link_hash_table_free (btab); | |
659 | } | |
df406460 NC |
660 | |
661 | /* Calculates the effective distance of a pc relative jump/call. */ | |
73160847 | 662 | |
df406460 NC |
663 | static int |
664 | avr_relative_distance_considering_wrap_around (unsigned int distance) | |
4cdc7696 | 665 | { |
df406460 | 666 | unsigned int wrap_around_mask = avr_pc_wrap_around - 1; |
df406460 NC |
667 | int dist_with_wrap_around = distance & wrap_around_mask; |
668 | ||
4cdc7696 | 669 | if (dist_with_wrap_around > ((int) (avr_pc_wrap_around >> 1))) |
df406460 NC |
670 | dist_with_wrap_around -= avr_pc_wrap_around; |
671 | ||
672 | return dist_with_wrap_around; | |
673 | } | |
674 | ||
675 | ||
adde6300 | 676 | static reloc_howto_type * |
4cdc7696 NC |
677 | bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
678 | bfd_reloc_code_real_type code) | |
adde6300 AM |
679 | { |
680 | unsigned int i; | |
681 | ||
682 | for (i = 0; | |
683 | i < sizeof (avr_reloc_map) / sizeof (struct avr_reloc_map); | |
684 | i++) | |
73160847 NC |
685 | if (avr_reloc_map[i].bfd_reloc_val == code) |
686 | return &elf_avr_howto_table[avr_reloc_map[i].elf_reloc_val]; | |
adde6300 AM |
687 | |
688 | return NULL; | |
689 | } | |
690 | ||
691 | /* Set the howto pointer for an AVR ELF reloc. */ | |
692 | ||
693 | static void | |
4cdc7696 NC |
694 | avr_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED, |
695 | arelent *cache_ptr, | |
696 | Elf_Internal_Rela *dst) | |
adde6300 AM |
697 | { |
698 | unsigned int r_type; | |
699 | ||
700 | r_type = ELF32_R_TYPE (dst->r_info); | |
701 | BFD_ASSERT (r_type < (unsigned int) R_AVR_max); | |
702 | cache_ptr->howto = &elf_avr_howto_table[r_type]; | |
703 | } | |
704 | ||
adde6300 AM |
705 | /* Look through the relocs for a section during the first phase. |
706 | Since we don't do .gots or .plts, we just need to consider the | |
707 | virtual table relocs for gc. */ | |
708 | ||
b34976b6 | 709 | static bfd_boolean |
4cdc7696 NC |
710 | elf32_avr_check_relocs (bfd *abfd, |
711 | struct bfd_link_info *info, | |
712 | asection *sec, | |
713 | const Elf_Internal_Rela *relocs) | |
adde6300 AM |
714 | { |
715 | Elf_Internal_Shdr *symtab_hdr; | |
716 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
717 | const Elf_Internal_Rela *rel; | |
718 | const Elf_Internal_Rela *rel_end; | |
719 | ||
1049f94e | 720 | if (info->relocatable) |
b34976b6 | 721 | return TRUE; |
adde6300 AM |
722 | |
723 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
724 | sym_hashes = elf_sym_hashes (abfd); | |
4cdc7696 | 725 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym); |
adde6300 AM |
726 | if (!elf_bad_symtab (abfd)) |
727 | sym_hashes_end -= symtab_hdr->sh_info; | |
728 | ||
729 | rel_end = relocs + sec->reloc_count; | |
730 | for (rel = relocs; rel < rel_end; rel++) | |
731 | { | |
732 | struct elf_link_hash_entry *h; | |
733 | unsigned long r_symndx; | |
734 | ||
735 | r_symndx = ELF32_R_SYM (rel->r_info); | |
736 | if (r_symndx < symtab_hdr->sh_info) | |
737 | h = NULL; | |
738 | else | |
973a3492 L |
739 | { |
740 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
741 | while (h->root.type == bfd_link_hash_indirect | |
742 | || h->root.type == bfd_link_hash_warning) | |
743 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
744 | } | |
adde6300 AM |
745 | } |
746 | ||
b34976b6 | 747 | return TRUE; |
adde6300 AM |
748 | } |
749 | ||
28c9d252 NC |
750 | static bfd_boolean |
751 | avr_stub_is_required_for_16_bit_reloc (bfd_vma relocation) | |
752 | { | |
753 | return (relocation >= 0x020000); | |
754 | } | |
755 | ||
756 | /* Returns the address of the corresponding stub if there is one. | |
757 | Returns otherwise an address above 0x020000. This function | |
758 | could also be used, if there is no knowledge on the section where | |
759 | the destination is found. */ | |
760 | ||
761 | static bfd_vma | |
762 | avr_get_stub_addr (bfd_vma srel, | |
763 | struct elf32_avr_link_hash_table *htab) | |
764 | { | |
765 | unsigned int index; | |
766 | bfd_vma stub_sec_addr = | |
767 | (htab->stub_sec->output_section->vma + | |
768 | htab->stub_sec->output_offset); | |
769 | ||
770 | for (index = 0; index < htab->amt_max_entry_cnt; index ++) | |
771 | if (htab->amt_destination_addr[index] == srel) | |
772 | return htab->amt_stub_offsets[index] + stub_sec_addr; | |
773 | ||
774 | /* Return an address that could not be reached by 16 bit relocs. */ | |
775 | return 0x020000; | |
776 | } | |
777 | ||
adde6300 AM |
778 | /* Perform a single relocation. By default we use the standard BFD |
779 | routines, but a few relocs, we have to do them ourselves. */ | |
780 | ||
781 | static bfd_reloc_status_type | |
28c9d252 NC |
782 | avr_final_link_relocate (reloc_howto_type * howto, |
783 | bfd * input_bfd, | |
784 | asection * input_section, | |
785 | bfd_byte * contents, | |
786 | Elf_Internal_Rela * rel, | |
787 | bfd_vma relocation, | |
788 | struct elf32_avr_link_hash_table * htab) | |
adde6300 AM |
789 | { |
790 | bfd_reloc_status_type r = bfd_reloc_ok; | |
791 | bfd_vma x; | |
792 | bfd_signed_vma srel; | |
28c9d252 NC |
793 | bfd_signed_vma reloc_addr; |
794 | bfd_boolean use_stubs = FALSE; | |
795 | /* Usually is 0, unless we are generating code for a bootloader. */ | |
796 | bfd_signed_vma base_addr = htab->vector_base; | |
797 | ||
798 | /* Absolute addr of the reloc in the final excecutable. */ | |
799 | reloc_addr = rel->r_offset + input_section->output_section->vma | |
800 | + input_section->output_offset; | |
adde6300 AM |
801 | |
802 | switch (howto->type) | |
803 | { | |
804 | case R_AVR_7_PCREL: | |
805 | contents += rel->r_offset; | |
806 | srel = (bfd_signed_vma) relocation; | |
807 | srel += rel->r_addend; | |
808 | srel -= rel->r_offset; | |
a7c10850 | 809 | srel -= 2; /* Branch instructions add 2 to the PC... */ |
adde6300 AM |
810 | srel -= (input_section->output_section->vma + |
811 | input_section->output_offset); | |
812 | ||
813 | if (srel & 1) | |
814 | return bfd_reloc_outofrange; | |
815 | if (srel > ((1 << 7) - 1) || (srel < - (1 << 7))) | |
816 | return bfd_reloc_overflow; | |
817 | x = bfd_get_16 (input_bfd, contents); | |
818 | x = (x & 0xfc07) | (((srel >> 1) << 3) & 0x3f8); | |
819 | bfd_put_16 (input_bfd, x, contents); | |
820 | break; | |
821 | ||
822 | case R_AVR_13_PCREL: | |
823 | contents += rel->r_offset; | |
824 | srel = (bfd_signed_vma) relocation; | |
825 | srel += rel->r_addend; | |
826 | srel -= rel->r_offset; | |
a7c10850 | 827 | srel -= 2; /* Branch instructions add 2 to the PC... */ |
adde6300 AM |
828 | srel -= (input_section->output_section->vma + |
829 | input_section->output_offset); | |
830 | ||
831 | if (srel & 1) | |
832 | return bfd_reloc_outofrange; | |
833 | ||
df406460 NC |
834 | srel = avr_relative_distance_considering_wrap_around (srel); |
835 | ||
adde6300 AM |
836 | /* AVR addresses commands as words. */ |
837 | srel >>= 1; | |
838 | ||
839 | /* Check for overflow. */ | |
840 | if (srel < -2048 || srel > 2047) | |
841 | { | |
df406460 NC |
842 | /* Relative distance is too large. */ |
843 | ||
844 | /* Always apply WRAPAROUND for avr2 and avr4. */ | |
65aa24b6 | 845 | switch (bfd_get_mach (input_bfd)) |
adde6300 | 846 | { |
65aa24b6 NC |
847 | case bfd_mach_avr2: |
848 | case bfd_mach_avr4: | |
849 | break; | |
850 | ||
851 | default: | |
852 | return bfd_reloc_overflow; | |
adde6300 | 853 | } |
adde6300 AM |
854 | } |
855 | ||
856 | x = bfd_get_16 (input_bfd, contents); | |
857 | x = (x & 0xf000) | (srel & 0xfff); | |
858 | bfd_put_16 (input_bfd, x, contents); | |
859 | break; | |
860 | ||
861 | case R_AVR_LO8_LDI: | |
862 | contents += rel->r_offset; | |
863 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
864 | x = bfd_get_16 (input_bfd, contents); | |
865 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
866 | bfd_put_16 (input_bfd, x, contents); | |
867 | break; | |
868 | ||
750bce0e NC |
869 | case R_AVR_LDI: |
870 | contents += rel->r_offset; | |
871 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
4cdc7696 NC |
872 | if (((srel > 0) && (srel & 0xffff) > 255) |
873 | || ((srel < 0) && ((-srel) & 0xffff) > 128)) | |
df406460 NC |
874 | /* Remove offset for data/eeprom section. */ |
875 | return bfd_reloc_overflow; | |
876 | ||
750bce0e NC |
877 | x = bfd_get_16 (input_bfd, contents); |
878 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
879 | bfd_put_16 (input_bfd, x, contents); | |
880 | break; | |
881 | ||
882 | case R_AVR_6: | |
883 | contents += rel->r_offset; | |
884 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
885 | if (((srel & 0xffff) > 63) || (srel < 0)) | |
886 | /* Remove offset for data/eeprom section. */ | |
887 | return bfd_reloc_overflow; | |
888 | x = bfd_get_16 (input_bfd, contents); | |
4cdc7696 | 889 | x = (x & 0xd3f8) | ((srel & 7) | ((srel & (3 << 3)) << 7) |
df406460 | 890 | | ((srel & (1 << 5)) << 8)); |
750bce0e NC |
891 | bfd_put_16 (input_bfd, x, contents); |
892 | break; | |
893 | ||
894 | case R_AVR_6_ADIW: | |
895 | contents += rel->r_offset; | |
896 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
897 | if (((srel & 0xffff) > 63) || (srel < 0)) | |
898 | /* Remove offset for data/eeprom section. */ | |
899 | return bfd_reloc_overflow; | |
900 | x = bfd_get_16 (input_bfd, contents); | |
4cdc7696 | 901 | x = (x & 0xff30) | (srel & 0xf) | ((srel & 0x30) << 2); |
750bce0e NC |
902 | bfd_put_16 (input_bfd, x, contents); |
903 | break; | |
904 | ||
adde6300 AM |
905 | case R_AVR_HI8_LDI: |
906 | contents += rel->r_offset; | |
907 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
908 | srel = (srel >> 8) & 0xff; | |
909 | x = bfd_get_16 (input_bfd, contents); | |
910 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
911 | bfd_put_16 (input_bfd, x, contents); | |
912 | break; | |
913 | ||
914 | case R_AVR_HH8_LDI: | |
915 | contents += rel->r_offset; | |
916 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
917 | srel = (srel >> 16) & 0xff; | |
918 | x = bfd_get_16 (input_bfd, contents); | |
919 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
920 | bfd_put_16 (input_bfd, x, contents); | |
921 | break; | |
922 | ||
df406460 NC |
923 | case R_AVR_MS8_LDI: |
924 | contents += rel->r_offset; | |
925 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
926 | srel = (srel >> 24) & 0xff; | |
927 | x = bfd_get_16 (input_bfd, contents); | |
928 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
929 | bfd_put_16 (input_bfd, x, contents); | |
930 | break; | |
931 | ||
adde6300 AM |
932 | case R_AVR_LO8_LDI_NEG: |
933 | contents += rel->r_offset; | |
934 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
935 | srel = -srel; | |
936 | x = bfd_get_16 (input_bfd, contents); | |
937 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
938 | bfd_put_16 (input_bfd, x, contents); | |
939 | break; | |
940 | ||
941 | case R_AVR_HI8_LDI_NEG: | |
942 | contents += rel->r_offset; | |
943 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
944 | srel = -srel; | |
945 | srel = (srel >> 8) & 0xff; | |
946 | x = bfd_get_16 (input_bfd, contents); | |
947 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
948 | bfd_put_16 (input_bfd, x, contents); | |
949 | break; | |
950 | ||
951 | case R_AVR_HH8_LDI_NEG: | |
952 | contents += rel->r_offset; | |
953 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
954 | srel = -srel; | |
955 | srel = (srel >> 16) & 0xff; | |
956 | x = bfd_get_16 (input_bfd, contents); | |
957 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
958 | bfd_put_16 (input_bfd, x, contents); | |
959 | break; | |
960 | ||
df406460 NC |
961 | case R_AVR_MS8_LDI_NEG: |
962 | contents += rel->r_offset; | |
963 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
964 | srel = -srel; | |
965 | srel = (srel >> 24) & 0xff; | |
966 | x = bfd_get_16 (input_bfd, contents); | |
967 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
968 | bfd_put_16 (input_bfd, x, contents); | |
969 | break; | |
970 | ||
28c9d252 NC |
971 | case R_AVR_LO8_LDI_GS: |
972 | use_stubs = (!htab->no_stubs); | |
973 | /* Fall through. */ | |
adde6300 AM |
974 | case R_AVR_LO8_LDI_PM: |
975 | contents += rel->r_offset; | |
976 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
28c9d252 NC |
977 | |
978 | if (use_stubs | |
979 | && avr_stub_is_required_for_16_bit_reloc (srel - base_addr)) | |
980 | { | |
981 | bfd_vma old_srel = srel; | |
982 | ||
983 | /* We need to use the address of the stub instead. */ | |
984 | srel = avr_get_stub_addr (srel, htab); | |
985 | if (debug_stubs) | |
986 | printf ("LD: Using jump stub (at 0x%x) with destination 0x%x for " | |
987 | "reloc at address 0x%x.\n", | |
988 | (unsigned int) srel, | |
989 | (unsigned int) old_srel, | |
990 | (unsigned int) reloc_addr); | |
991 | ||
992 | if (avr_stub_is_required_for_16_bit_reloc (srel - base_addr)) | |
993 | return bfd_reloc_outofrange; | |
994 | } | |
995 | ||
adde6300 AM |
996 | if (srel & 1) |
997 | return bfd_reloc_outofrange; | |
998 | srel = srel >> 1; | |
999 | x = bfd_get_16 (input_bfd, contents); | |
1000 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
1001 | bfd_put_16 (input_bfd, x, contents); | |
1002 | break; | |
1003 | ||
28c9d252 NC |
1004 | case R_AVR_HI8_LDI_GS: |
1005 | use_stubs = (!htab->no_stubs); | |
1006 | /* Fall through. */ | |
adde6300 AM |
1007 | case R_AVR_HI8_LDI_PM: |
1008 | contents += rel->r_offset; | |
1009 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
28c9d252 NC |
1010 | |
1011 | if (use_stubs | |
1012 | && avr_stub_is_required_for_16_bit_reloc (srel - base_addr)) | |
1013 | { | |
1014 | bfd_vma old_srel = srel; | |
1015 | ||
1016 | /* We need to use the address of the stub instead. */ | |
1017 | srel = avr_get_stub_addr (srel, htab); | |
1018 | if (debug_stubs) | |
1019 | printf ("LD: Using jump stub (at 0x%x) with destination 0x%x for " | |
1020 | "reloc at address 0x%x.\n", | |
1021 | (unsigned int) srel, | |
1022 | (unsigned int) old_srel, | |
1023 | (unsigned int) reloc_addr); | |
1024 | ||
1025 | if (avr_stub_is_required_for_16_bit_reloc (srel - base_addr)) | |
1026 | return bfd_reloc_outofrange; | |
1027 | } | |
1028 | ||
adde6300 AM |
1029 | if (srel & 1) |
1030 | return bfd_reloc_outofrange; | |
1031 | srel = srel >> 1; | |
1032 | srel = (srel >> 8) & 0xff; | |
1033 | x = bfd_get_16 (input_bfd, contents); | |
1034 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
1035 | bfd_put_16 (input_bfd, x, contents); | |
1036 | break; | |
1037 | ||
1038 | case R_AVR_HH8_LDI_PM: | |
1039 | contents += rel->r_offset; | |
1040 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
1041 | if (srel & 1) | |
1042 | return bfd_reloc_outofrange; | |
1043 | srel = srel >> 1; | |
1044 | srel = (srel >> 16) & 0xff; | |
1045 | x = bfd_get_16 (input_bfd, contents); | |
1046 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
1047 | bfd_put_16 (input_bfd, x, contents); | |
1048 | break; | |
1049 | ||
1050 | case R_AVR_LO8_LDI_PM_NEG: | |
1051 | contents += rel->r_offset; | |
1052 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
1053 | srel = -srel; | |
1054 | if (srel & 1) | |
1055 | return bfd_reloc_outofrange; | |
1056 | srel = srel >> 1; | |
1057 | x = bfd_get_16 (input_bfd, contents); | |
1058 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
1059 | bfd_put_16 (input_bfd, x, contents); | |
1060 | break; | |
1061 | ||
1062 | case R_AVR_HI8_LDI_PM_NEG: | |
1063 | contents += rel->r_offset; | |
1064 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
1065 | srel = -srel; | |
1066 | if (srel & 1) | |
1067 | return bfd_reloc_outofrange; | |
1068 | srel = srel >> 1; | |
1069 | srel = (srel >> 8) & 0xff; | |
1070 | x = bfd_get_16 (input_bfd, contents); | |
1071 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
1072 | bfd_put_16 (input_bfd, x, contents); | |
1073 | break; | |
1074 | ||
1075 | case R_AVR_HH8_LDI_PM_NEG: | |
1076 | contents += rel->r_offset; | |
1077 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
1078 | srel = -srel; | |
1079 | if (srel & 1) | |
1080 | return bfd_reloc_outofrange; | |
1081 | srel = srel >> 1; | |
1082 | srel = (srel >> 16) & 0xff; | |
1083 | x = bfd_get_16 (input_bfd, contents); | |
1084 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
1085 | bfd_put_16 (input_bfd, x, contents); | |
1086 | break; | |
1087 | ||
1088 | case R_AVR_CALL: | |
1089 | contents += rel->r_offset; | |
1090 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
1091 | if (srel & 1) | |
1092 | return bfd_reloc_outofrange; | |
1093 | srel = srel >> 1; | |
1094 | x = bfd_get_16 (input_bfd, contents); | |
1095 | x |= ((srel & 0x10000) | ((srel << 3) & 0x1f00000)) >> 16; | |
1096 | bfd_put_16 (input_bfd, x, contents); | |
dc810e39 | 1097 | bfd_put_16 (input_bfd, (bfd_vma) srel & 0xffff, contents+2); |
adde6300 AM |
1098 | break; |
1099 | ||
28c9d252 NC |
1100 | case R_AVR_16_PM: |
1101 | use_stubs = (!htab->no_stubs); | |
1102 | contents += rel->r_offset; | |
1103 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
1104 | ||
1105 | if (use_stubs | |
1106 | && avr_stub_is_required_for_16_bit_reloc (srel - base_addr)) | |
1107 | { | |
1108 | bfd_vma old_srel = srel; | |
1109 | ||
1110 | /* We need to use the address of the stub instead. */ | |
1111 | srel = avr_get_stub_addr (srel,htab); | |
1112 | if (debug_stubs) | |
1113 | printf ("LD: Using jump stub (at 0x%x) with destination 0x%x for " | |
1114 | "reloc at address 0x%x.\n", | |
1115 | (unsigned int) srel, | |
1116 | (unsigned int) old_srel, | |
1117 | (unsigned int) reloc_addr); | |
1118 | ||
1119 | if (avr_stub_is_required_for_16_bit_reloc (srel - base_addr)) | |
1120 | return bfd_reloc_outofrange; | |
1121 | } | |
1122 | ||
1123 | if (srel & 1) | |
1124 | return bfd_reloc_outofrange; | |
1125 | srel = srel >> 1; | |
1126 | bfd_put_16 (input_bfd, (bfd_vma) srel &0x00ffff, contents); | |
1127 | break; | |
1128 | ||
adde6300 AM |
1129 | default: |
1130 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1131 | contents, rel->r_offset, | |
1132 | relocation, rel->r_addend); | |
1133 | } | |
1134 | ||
1135 | return r; | |
1136 | } | |
1137 | ||
1138 | /* Relocate an AVR ELF section. */ | |
4cdc7696 | 1139 | |
b34976b6 | 1140 | static bfd_boolean |
4cdc7696 NC |
1141 | elf32_avr_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED, |
1142 | struct bfd_link_info *info, | |
1143 | bfd *input_bfd, | |
1144 | asection *input_section, | |
1145 | bfd_byte *contents, | |
1146 | Elf_Internal_Rela *relocs, | |
1147 | Elf_Internal_Sym *local_syms, | |
1148 | asection **local_sections) | |
adde6300 AM |
1149 | { |
1150 | Elf_Internal_Shdr * symtab_hdr; | |
1151 | struct elf_link_hash_entry ** sym_hashes; | |
1152 | Elf_Internal_Rela * rel; | |
1153 | Elf_Internal_Rela * relend; | |
28c9d252 | 1154 | struct elf32_avr_link_hash_table * htab = avr_link_hash_table (info); |
adde6300 AM |
1155 | |
1156 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; | |
1157 | sym_hashes = elf_sym_hashes (input_bfd); | |
1158 | relend = relocs + input_section->reloc_count; | |
1159 | ||
1160 | for (rel = relocs; rel < relend; rel ++) | |
1161 | { | |
1162 | reloc_howto_type * howto; | |
1163 | unsigned long r_symndx; | |
1164 | Elf_Internal_Sym * sym; | |
1165 | asection * sec; | |
1166 | struct elf_link_hash_entry * h; | |
1167 | bfd_vma relocation; | |
1168 | bfd_reloc_status_type r; | |
dfeffb9f | 1169 | const char * name; |
adde6300 AM |
1170 | int r_type; |
1171 | ||
1172 | r_type = ELF32_R_TYPE (rel->r_info); | |
1173 | r_symndx = ELF32_R_SYM (rel->r_info); | |
adde6300 AM |
1174 | howto = elf_avr_howto_table + ELF32_R_TYPE (rel->r_info); |
1175 | h = NULL; | |
1176 | sym = NULL; | |
1177 | sec = NULL; | |
1178 | ||
1179 | if (r_symndx < symtab_hdr->sh_info) | |
1180 | { | |
1181 | sym = local_syms + r_symndx; | |
1182 | sec = local_sections [r_symndx]; | |
8517fae7 | 1183 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
adde6300 AM |
1184 | |
1185 | name = bfd_elf_string_from_elf_section | |
1186 | (input_bfd, symtab_hdr->sh_link, sym->st_name); | |
1187 | name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; | |
1188 | } | |
1189 | else | |
1190 | { | |
59c2e50f | 1191 | bfd_boolean unresolved_reloc, warned; |
adde6300 | 1192 | |
b2a8e766 AM |
1193 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
1194 | r_symndx, symtab_hdr, sym_hashes, | |
1195 | h, sec, relocation, | |
1196 | unresolved_reloc, warned); | |
dfeffb9f L |
1197 | |
1198 | name = h->root.root.string; | |
adde6300 AM |
1199 | } |
1200 | ||
ab96bf03 AM |
1201 | if (sec != NULL && elf_discarded_section (sec)) |
1202 | { | |
1203 | /* For relocs against symbols from removed linkonce sections, | |
1204 | or sections discarded by a linker script, we just want the | |
1205 | section contents zeroed. Avoid any special processing. */ | |
1206 | _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); | |
1207 | rel->r_info = 0; | |
1208 | rel->r_addend = 0; | |
1209 | continue; | |
1210 | } | |
1211 | ||
1212 | if (info->relocatable) | |
1213 | continue; | |
1214 | ||
adde6300 | 1215 | r = avr_final_link_relocate (howto, input_bfd, input_section, |
28c9d252 | 1216 | contents, rel, relocation, htab); |
adde6300 AM |
1217 | |
1218 | if (r != bfd_reloc_ok) | |
1219 | { | |
1220 | const char * msg = (const char *) NULL; | |
1221 | ||
1222 | switch (r) | |
1223 | { | |
1224 | case bfd_reloc_overflow: | |
1225 | r = info->callbacks->reloc_overflow | |
dfeffb9f L |
1226 | (info, (h ? &h->root : NULL), |
1227 | name, howto->name, (bfd_vma) 0, | |
adde6300 AM |
1228 | input_bfd, input_section, rel->r_offset); |
1229 | break; | |
1230 | ||
1231 | case bfd_reloc_undefined: | |
1232 | r = info->callbacks->undefined_symbol | |
b34976b6 | 1233 | (info, name, input_bfd, input_section, rel->r_offset, TRUE); |
adde6300 AM |
1234 | break; |
1235 | ||
1236 | case bfd_reloc_outofrange: | |
1237 | msg = _("internal error: out of range error"); | |
1238 | break; | |
1239 | ||
1240 | case bfd_reloc_notsupported: | |
1241 | msg = _("internal error: unsupported relocation error"); | |
1242 | break; | |
1243 | ||
1244 | case bfd_reloc_dangerous: | |
1245 | msg = _("internal error: dangerous relocation"); | |
1246 | break; | |
1247 | ||
1248 | default: | |
1249 | msg = _("internal error: unknown error"); | |
1250 | break; | |
1251 | } | |
1252 | ||
1253 | if (msg) | |
1254 | r = info->callbacks->warning | |
1255 | (info, msg, name, input_bfd, input_section, rel->r_offset); | |
1256 | ||
1257 | if (! r) | |
b34976b6 | 1258 | return FALSE; |
adde6300 AM |
1259 | } |
1260 | } | |
1261 | ||
b34976b6 | 1262 | return TRUE; |
adde6300 AM |
1263 | } |
1264 | ||
1265 | /* The final processing done just before writing out a AVR ELF object | |
1266 | file. This gets the AVR architecture right based on the machine | |
1267 | number. */ | |
1268 | ||
1269 | static void | |
4cdc7696 NC |
1270 | bfd_elf_avr_final_write_processing (bfd *abfd, |
1271 | bfd_boolean linker ATTRIBUTE_UNUSED) | |
adde6300 AM |
1272 | { |
1273 | unsigned long val; | |
1274 | ||
1275 | switch (bfd_get_mach (abfd)) | |
1276 | { | |
1277 | default: | |
1278 | case bfd_mach_avr2: | |
1279 | val = E_AVR_MACH_AVR2; | |
1280 | break; | |
1281 | ||
1282 | case bfd_mach_avr1: | |
1283 | val = E_AVR_MACH_AVR1; | |
1284 | break; | |
1285 | ||
1286 | case bfd_mach_avr3: | |
1287 | val = E_AVR_MACH_AVR3; | |
1288 | break; | |
1289 | ||
1290 | case bfd_mach_avr4: | |
1291 | val = E_AVR_MACH_AVR4; | |
1292 | break; | |
1293 | ||
65aa24b6 NC |
1294 | case bfd_mach_avr5: |
1295 | val = E_AVR_MACH_AVR5; | |
1296 | break; | |
28c9d252 NC |
1297 | |
1298 | case bfd_mach_avr6: | |
1299 | val = E_AVR_MACH_AVR6; | |
1300 | break; | |
adde6300 AM |
1301 | } |
1302 | ||
1303 | elf_elfheader (abfd)->e_machine = EM_AVR; | |
1304 | elf_elfheader (abfd)->e_flags &= ~ EF_AVR_MACH; | |
1305 | elf_elfheader (abfd)->e_flags |= val; | |
df406460 | 1306 | elf_elfheader (abfd)->e_flags |= EF_AVR_LINKRELAX_PREPARED; |
adde6300 AM |
1307 | } |
1308 | ||
1309 | /* Set the right machine number. */ | |
1310 | ||
b34976b6 | 1311 | static bfd_boolean |
4cdc7696 | 1312 | elf32_avr_object_p (bfd *abfd) |
adde6300 | 1313 | { |
dc810e39 | 1314 | unsigned int e_set = bfd_mach_avr2; |
4cdc7696 | 1315 | |
aa4f99bb AO |
1316 | if (elf_elfheader (abfd)->e_machine == EM_AVR |
1317 | || elf_elfheader (abfd)->e_machine == EM_AVR_OLD) | |
adde6300 AM |
1318 | { |
1319 | int e_mach = elf_elfheader (abfd)->e_flags & EF_AVR_MACH; | |
4cdc7696 | 1320 | |
adde6300 AM |
1321 | switch (e_mach) |
1322 | { | |
1323 | default: | |
1324 | case E_AVR_MACH_AVR2: | |
1325 | e_set = bfd_mach_avr2; | |
1326 | break; | |
1327 | ||
1328 | case E_AVR_MACH_AVR1: | |
1329 | e_set = bfd_mach_avr1; | |
1330 | break; | |
1331 | ||
1332 | case E_AVR_MACH_AVR3: | |
1333 | e_set = bfd_mach_avr3; | |
1334 | break; | |
1335 | ||
1336 | case E_AVR_MACH_AVR4: | |
1337 | e_set = bfd_mach_avr4; | |
1338 | break; | |
65aa24b6 NC |
1339 | |
1340 | case E_AVR_MACH_AVR5: | |
1341 | e_set = bfd_mach_avr5; | |
1342 | break; | |
28c9d252 NC |
1343 | |
1344 | case E_AVR_MACH_AVR6: | |
1345 | e_set = bfd_mach_avr6; | |
1346 | break; | |
adde6300 AM |
1347 | } |
1348 | } | |
1349 | return bfd_default_set_arch_mach (abfd, bfd_arch_avr, | |
1350 | e_set); | |
1351 | } | |
1352 | ||
df406460 | 1353 | |
4cdc7696 NC |
1354 | /* Delete some bytes from a section while changing the size of an instruction. |
1355 | The parameter "addr" denotes the section-relative offset pointing just | |
1356 | behind the shrinked instruction. "addr+count" point at the first | |
1357 | byte just behind the original unshrinked instruction. */ | |
1358 | ||
1359 | static bfd_boolean | |
1360 | elf32_avr_relax_delete_bytes (bfd *abfd, | |
73160847 | 1361 | asection *sec, |
4cdc7696 | 1362 | bfd_vma addr, |
73160847 | 1363 | int count) |
4cdc7696 NC |
1364 | { |
1365 | Elf_Internal_Shdr *symtab_hdr; | |
1366 | unsigned int sec_shndx; | |
1367 | bfd_byte *contents; | |
1368 | Elf_Internal_Rela *irel, *irelend; | |
1369 | Elf_Internal_Rela *irelalign; | |
1370 | Elf_Internal_Sym *isym; | |
1371 | Elf_Internal_Sym *isymbuf = NULL; | |
1372 | Elf_Internal_Sym *isymend; | |
1373 | bfd_vma toaddr; | |
1374 | struct elf_link_hash_entry **sym_hashes; | |
1375 | struct elf_link_hash_entry **end_hashes; | |
1376 | unsigned int symcount; | |
1377 | ||
1378 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1379 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); | |
1380 | contents = elf_section_data (sec)->this_hdr.contents; | |
1381 | ||
1382 | /* The deletion must stop at the next ALIGN reloc for an aligment | |
1383 | power larger than the number of bytes we are deleting. */ | |
1384 | ||
1385 | irelalign = NULL; | |
1386 | toaddr = sec->size; | |
1387 | ||
1388 | irel = elf_section_data (sec)->relocs; | |
1389 | irelend = irel + sec->reloc_count; | |
1390 | ||
1391 | /* Actually delete the bytes. */ | |
1392 | if (toaddr - addr - count > 0) | |
1393 | memmove (contents + addr, contents + addr + count, | |
1394 | (size_t) (toaddr - addr - count)); | |
1395 | sec->size -= count; | |
1396 | ||
73160847 | 1397 | /* Adjust all the reloc addresses. */ |
4cdc7696 NC |
1398 | for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) |
1399 | { | |
4cdc7696 NC |
1400 | bfd_vma old_reloc_address; |
1401 | bfd_vma shrinked_insn_address; | |
1402 | ||
1403 | old_reloc_address = (sec->output_section->vma | |
1404 | + sec->output_offset + irel->r_offset); | |
1405 | shrinked_insn_address = (sec->output_section->vma | |
1406 | + sec->output_offset + addr - count); | |
1407 | ||
1408 | /* Get the new reloc address. */ | |
1409 | if ((irel->r_offset > addr | |
1410 | && irel->r_offset < toaddr)) | |
1411 | { | |
28c9d252 | 1412 | if (debug_relax) |
4cdc7696 NC |
1413 | printf ("Relocation at address 0x%x needs to be moved.\n" |
1414 | "Old section offset: 0x%x, New section offset: 0x%x \n", | |
1415 | (unsigned int) old_reloc_address, | |
1416 | (unsigned int) irel->r_offset, | |
1417 | (unsigned int) ((irel->r_offset) - count)); | |
1418 | ||
1419 | irel->r_offset -= count; | |
1420 | } | |
1421 | ||
73160847 | 1422 | } |
4cdc7696 | 1423 | |
73160847 NC |
1424 | /* The reloc's own addresses are now ok. However, we need to readjust |
1425 | the reloc's addend, i.e. the reloc's value if two conditions are met: | |
1426 | 1.) the reloc is relative to a symbol in this section that | |
1427 | is located in front of the shrinked instruction | |
28c9d252 NC |
1428 | 2.) symbol plus addend end up behind the shrinked instruction. |
1429 | ||
73160847 NC |
1430 | The most common case where this happens are relocs relative to |
1431 | the section-start symbol. | |
28c9d252 | 1432 | |
73160847 NC |
1433 | This step needs to be done for all of the sections of the bfd. */ |
1434 | ||
1435 | { | |
1436 | struct bfd_section *isec; | |
1437 | ||
1438 | for (isec = abfd->sections; isec; isec = isec->next) | |
1439 | { | |
1440 | bfd_vma symval; | |
1441 | bfd_vma shrinked_insn_address; | |
1442 | ||
1443 | shrinked_insn_address = (sec->output_section->vma | |
1444 | + sec->output_offset + addr - count); | |
1445 | ||
1446 | irelend = elf_section_data (isec)->relocs + isec->reloc_count; | |
28c9d252 | 1447 | for (irel = elf_section_data (isec)->relocs; |
73160847 NC |
1448 | irel < irelend; |
1449 | irel++) | |
1450 | { | |
28c9d252 | 1451 | /* Read this BFD's local symbols if we haven't done |
73160847 NC |
1452 | so already. */ |
1453 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) | |
1454 | { | |
1455 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
1456 | if (isymbuf == NULL) | |
1457 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
1458 | symtab_hdr->sh_info, 0, | |
1459 | NULL, NULL, NULL); | |
1460 | if (isymbuf == NULL) | |
1461 | return FALSE; | |
1462 | } | |
1463 | ||
1464 | /* Get the value of the symbol referred to by the reloc. */ | |
1465 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
1466 | { | |
1467 | /* A local symbol. */ | |
1468 | Elf_Internal_Sym *isym; | |
1469 | asection *sym_sec; | |
1470 | ||
1471 | isym = isymbuf + ELF32_R_SYM (irel->r_info); | |
1472 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
1473 | symval = isym->st_value; | |
1474 | /* If the reloc is absolute, it will not have | |
1475 | a symbol or section associated with it. */ | |
1476 | if (sym_sec == sec) | |
28c9d252 | 1477 | { |
73160847 NC |
1478 | symval += sym_sec->output_section->vma |
1479 | + sym_sec->output_offset; | |
4cdc7696 | 1480 | |
28c9d252 | 1481 | if (debug_relax) |
73160847 NC |
1482 | printf ("Checking if the relocation's " |
1483 | "addend needs corrections.\n" | |
1484 | "Address of anchor symbol: 0x%x \n" | |
1485 | "Address of relocation target: 0x%x \n" | |
1486 | "Address of relaxed insn: 0x%x \n", | |
1487 | (unsigned int) symval, | |
1488 | (unsigned int) (symval + irel->r_addend), | |
1489 | (unsigned int) shrinked_insn_address); | |
1490 | ||
1491 | if (symval <= shrinked_insn_address | |
1492 | && (symval + irel->r_addend) > shrinked_insn_address) | |
1493 | { | |
1494 | irel->r_addend -= count; | |
1495 | ||
28c9d252 | 1496 | if (debug_relax) |
73160847 NC |
1497 | printf ("Relocation's addend needed to be fixed \n"); |
1498 | } | |
4cdc7696 | 1499 | } |
73160847 | 1500 | /* else...Reference symbol is absolute. No adjustment needed. */ |
28c9d252 NC |
1501 | } |
1502 | /* else...Reference symbol is extern. No need for adjusting | |
73160847 | 1503 | the addend. */ |
28c9d252 | 1504 | } |
73160847 NC |
1505 | } |
1506 | } | |
4cdc7696 NC |
1507 | |
1508 | /* Adjust the local symbols defined in this section. */ | |
1509 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; | |
1510 | isymend = isym + symtab_hdr->sh_info; | |
1511 | for (; isym < isymend; isym++) | |
1512 | { | |
1513 | if (isym->st_shndx == sec_shndx | |
1514 | && isym->st_value > addr | |
1515 | && isym->st_value < toaddr) | |
1516 | isym->st_value -= count; | |
1517 | } | |
1518 | ||
1519 | /* Now adjust the global symbols defined in this section. */ | |
1520 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) | |
1521 | - symtab_hdr->sh_info); | |
1522 | sym_hashes = elf_sym_hashes (abfd); | |
1523 | end_hashes = sym_hashes + symcount; | |
1524 | for (; sym_hashes < end_hashes; sym_hashes++) | |
1525 | { | |
1526 | struct elf_link_hash_entry *sym_hash = *sym_hashes; | |
1527 | if ((sym_hash->root.type == bfd_link_hash_defined | |
1528 | || sym_hash->root.type == bfd_link_hash_defweak) | |
1529 | && sym_hash->root.u.def.section == sec | |
1530 | && sym_hash->root.u.def.value > addr | |
1531 | && sym_hash->root.u.def.value < toaddr) | |
1532 | { | |
1533 | sym_hash->root.u.def.value -= count; | |
1534 | } | |
1535 | } | |
1536 | ||
1537 | return TRUE; | |
1538 | } | |
1539 | ||
df406460 NC |
1540 | /* This function handles relaxing for the avr. |
1541 | Many important relaxing opportunities within functions are already | |
1542 | realized by the compiler itself. | |
1543 | Here we try to replace call (4 bytes) -> rcall (2 bytes) | |
4cdc7696 NC |
1544 | and jump -> rjmp (safes also 2 bytes). |
1545 | As well we now optimize seqences of | |
df406460 NC |
1546 | - call/rcall function |
1547 | - ret | |
1548 | to yield | |
1549 | - jmp/rjmp function | |
1550 | - ret | |
1551 | . In case that within a sequence | |
1552 | - jmp/rjmp label | |
1553 | - ret | |
1554 | the ret could no longer be reached it is optimized away. In order | |
1555 | to check if the ret is no longer needed, it is checked that the ret's address | |
1556 | is not the target of a branch or jump within the same section, it is checked | |
1557 | that there is no skip instruction before the jmp/rjmp and that there | |
1558 | is no local or global label place at the address of the ret. | |
4cdc7696 | 1559 | |
df406460 | 1560 | We refrain from relaxing within sections ".vectors" and |
4cdc7696 | 1561 | ".jumptables" in order to maintain the position of the instructions. |
df406460 | 1562 | There, however, we substitute jmp/call by a sequence rjmp,nop/rcall,nop |
4cdc7696 | 1563 | if possible. (In future one could possibly use the space of the nop |
df406460 NC |
1564 | for the first instruction of the irq service function. |
1565 | ||
1566 | The .jumptables sections is meant to be used for a future tablejump variant | |
1567 | for the devices with 3-byte program counter where the table itself | |
4cdc7696 | 1568 | contains 4-byte jump instructions whose relative offset must not |
df406460 | 1569 | be changed. */ |
4cdc7696 | 1570 | |
28c9d252 | 1571 | static bfd_boolean |
4cdc7696 NC |
1572 | elf32_avr_relax_section (bfd *abfd, |
1573 | asection *sec, | |
df406460 NC |
1574 | struct bfd_link_info *link_info, |
1575 | bfd_boolean *again) | |
1576 | { | |
1577 | Elf_Internal_Shdr *symtab_hdr; | |
1578 | Elf_Internal_Rela *internal_relocs; | |
1579 | Elf_Internal_Rela *irel, *irelend; | |
1580 | bfd_byte *contents = NULL; | |
1581 | Elf_Internal_Sym *isymbuf = NULL; | |
1582 | static asection *last_input_section = NULL; | |
1583 | static Elf_Internal_Rela *last_reloc = NULL; | |
28c9d252 NC |
1584 | struct elf32_avr_link_hash_table *htab; |
1585 | ||
1586 | htab = avr_link_hash_table (link_info); | |
64ee10b6 NC |
1587 | if (htab == NULL) |
1588 | return FALSE; | |
df406460 NC |
1589 | |
1590 | /* Assume nothing changes. */ | |
1591 | *again = FALSE; | |
1592 | ||
28c9d252 NC |
1593 | if ((!htab->no_stubs) && (sec == htab->stub_sec)) |
1594 | { | |
1595 | /* We are just relaxing the stub section. | |
1596 | Let's calculate the size needed again. */ | |
1597 | bfd_size_type last_estimated_stub_section_size = htab->stub_sec->size; | |
1598 | ||
1599 | if (debug_relax) | |
1600 | printf ("Relaxing the stub section. Size prior to this pass: %i\n", | |
1601 | (int) last_estimated_stub_section_size); | |
1602 | ||
1603 | elf32_avr_size_stubs (htab->stub_sec->output_section->owner, | |
1604 | link_info, FALSE); | |
1605 | ||
1606 | /* Check if the number of trampolines changed. */ | |
1607 | if (last_estimated_stub_section_size != htab->stub_sec->size) | |
1608 | *again = TRUE; | |
1609 | ||
1610 | if (debug_relax) | |
1611 | printf ("Size of stub section after this pass: %i\n", | |
1612 | (int) htab->stub_sec->size); | |
1613 | ||
1614 | return TRUE; | |
1615 | } | |
1616 | ||
df406460 NC |
1617 | /* We don't have to do anything for a relocatable link, if |
1618 | this section does not have relocs, or if this is not a | |
1619 | code section. */ | |
1620 | if (link_info->relocatable | |
1621 | || (sec->flags & SEC_RELOC) == 0 | |
1622 | || sec->reloc_count == 0 | |
1623 | || (sec->flags & SEC_CODE) == 0) | |
1624 | return TRUE; | |
4cdc7696 | 1625 | |
df406460 NC |
1626 | /* Check if the object file to relax uses internal symbols so that we |
1627 | could fix up the relocations. */ | |
df406460 NC |
1628 | if (!(elf_elfheader (abfd)->e_flags & EF_AVR_LINKRELAX_PREPARED)) |
1629 | return TRUE; | |
df406460 NC |
1630 | |
1631 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1632 | ||
1633 | /* Get a copy of the native relocations. */ | |
1634 | internal_relocs = (_bfd_elf_link_read_relocs | |
4cdc7696 | 1635 | (abfd, sec, NULL, NULL, link_info->keep_memory)); |
df406460 NC |
1636 | if (internal_relocs == NULL) |
1637 | goto error_return; | |
1638 | ||
1639 | if (sec != last_input_section) | |
1640 | last_reloc = NULL; | |
1641 | ||
1642 | last_input_section = sec; | |
1643 | ||
1644 | /* Walk through the relocs looking for relaxing opportunities. */ | |
1645 | irelend = internal_relocs + sec->reloc_count; | |
1646 | for (irel = internal_relocs; irel < irelend; irel++) | |
1647 | { | |
1648 | bfd_vma symval; | |
1649 | ||
4cdc7696 | 1650 | if ( ELF32_R_TYPE (irel->r_info) != R_AVR_13_PCREL |
df406460 NC |
1651 | && ELF32_R_TYPE (irel->r_info) != R_AVR_7_PCREL |
1652 | && ELF32_R_TYPE (irel->r_info) != R_AVR_CALL) | |
1653 | continue; | |
4cdc7696 | 1654 | |
df406460 NC |
1655 | /* Get the section contents if we haven't done so already. */ |
1656 | if (contents == NULL) | |
1657 | { | |
1658 | /* Get cached copy if it exists. */ | |
1659 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1660 | contents = elf_section_data (sec)->this_hdr.contents; | |
1661 | else | |
1662 | { | |
1663 | /* Go get them off disk. */ | |
4cdc7696 | 1664 | if (! bfd_malloc_and_get_section (abfd, sec, &contents)) |
df406460 NC |
1665 | goto error_return; |
1666 | } | |
1667 | } | |
1668 | ||
1669 | /* Read this BFD's local symbols if we haven't done so already. */ | |
1670 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) | |
1671 | { | |
1672 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
1673 | if (isymbuf == NULL) | |
1674 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
1675 | symtab_hdr->sh_info, 0, | |
1676 | NULL, NULL, NULL); | |
1677 | if (isymbuf == NULL) | |
1678 | goto error_return; | |
1679 | } | |
1680 | ||
1681 | ||
1682 | /* Get the value of the symbol referred to by the reloc. */ | |
1683 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
1684 | { | |
1685 | /* A local symbol. */ | |
1686 | Elf_Internal_Sym *isym; | |
1687 | asection *sym_sec; | |
1688 | ||
1689 | isym = isymbuf + ELF32_R_SYM (irel->r_info); | |
1690 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
1691 | symval = isym->st_value; | |
1692 | /* If the reloc is absolute, it will not have | |
1693 | a symbol or section associated with it. */ | |
1694 | if (sym_sec) | |
1695 | symval += sym_sec->output_section->vma | |
1696 | + sym_sec->output_offset; | |
1697 | } | |
1698 | else | |
1699 | { | |
1700 | unsigned long indx; | |
1701 | struct elf_link_hash_entry *h; | |
1702 | ||
1703 | /* An external symbol. */ | |
1704 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; | |
1705 | h = elf_sym_hashes (abfd)[indx]; | |
1706 | BFD_ASSERT (h != NULL); | |
1707 | if (h->root.type != bfd_link_hash_defined | |
1708 | && h->root.type != bfd_link_hash_defweak) | |
4cdc7696 NC |
1709 | /* This appears to be a reference to an undefined |
1710 | symbol. Just ignore it--it will be caught by the | |
1711 | regular reloc processing. */ | |
1712 | continue; | |
1713 | ||
df406460 NC |
1714 | symval = (h->root.u.def.value |
1715 | + h->root.u.def.section->output_section->vma | |
1716 | + h->root.u.def.section->output_offset); | |
1717 | } | |
1718 | ||
1719 | /* For simplicity of coding, we are going to modify the section | |
1720 | contents, the section relocs, and the BFD symbol table. We | |
1721 | must tell the rest of the code not to free up this | |
1722 | information. It would be possible to instead create a table | |
1723 | of changes which have to be made, as is done in coff-mips.c; | |
1724 | that would be more work, but would require less memory when | |
1725 | the linker is run. */ | |
1726 | switch (ELF32_R_TYPE (irel->r_info)) | |
1727 | { | |
1728 | /* Try to turn a 22-bit absolute call/jump into an 13-bit | |
1729 | pc-relative rcall/rjmp. */ | |
1730 | case R_AVR_CALL: | |
1731 | { | |
1732 | bfd_vma value = symval + irel->r_addend; | |
1733 | bfd_vma dot, gap; | |
1734 | int distance_short_enough = 0; | |
1735 | ||
1736 | /* Get the address of this instruction. */ | |
1737 | dot = (sec->output_section->vma | |
1738 | + sec->output_offset + irel->r_offset); | |
1739 | ||
1740 | /* Compute the distance from this insn to the branch target. */ | |
1741 | gap = value - dot; | |
1742 | ||
1743 | /* If the distance is within -4094..+4098 inclusive, then we can | |
1744 | relax this jump/call. +4098 because the call/jump target | |
4cdc7696 | 1745 | will be closer after the relaxation. */ |
df406460 NC |
1746 | if ((int) gap >= -4094 && (int) gap <= 4098) |
1747 | distance_short_enough = 1; | |
1748 | ||
1749 | /* Here we handle the wrap-around case. E.g. for a 16k device | |
4cdc7696 | 1750 | we could use a rjmp to jump from address 0x100 to 0x3d00! |
df406460 NC |
1751 | In order to make this work properly, we need to fill the |
1752 | vaiable avr_pc_wrap_around with the appropriate value. | |
1753 | I.e. 0x4000 for a 16k device. */ | |
1754 | { | |
1755 | /* Shrinking the code size makes the gaps larger in the | |
1756 | case of wrap-arounds. So we use a heuristical safety | |
1757 | margin to avoid that during relax the distance gets | |
1758 | again too large for the short jumps. Let's assume | |
1759 | a typical code-size reduction due to relax for a | |
1760 | 16k device of 600 bytes. So let's use twice the | |
4cdc7696 | 1761 | typical value as safety margin. */ |
df406460 NC |
1762 | int rgap; |
1763 | int safety_margin; | |
1764 | ||
1765 | int assumed_shrink = 600; | |
1766 | if (avr_pc_wrap_around > 0x4000) | |
1767 | assumed_shrink = 900; | |
4cdc7696 | 1768 | |
df406460 NC |
1769 | safety_margin = 2 * assumed_shrink; |
1770 | ||
1771 | rgap = avr_relative_distance_considering_wrap_around (gap); | |
4cdc7696 NC |
1772 | |
1773 | if (rgap >= (-4092 + safety_margin) | |
df406460 | 1774 | && rgap <= (4094 - safety_margin)) |
4cdc7696 NC |
1775 | distance_short_enough = 1; |
1776 | } | |
df406460 NC |
1777 | |
1778 | if (distance_short_enough) | |
1779 | { | |
1780 | unsigned char code_msb; | |
1781 | unsigned char code_lsb; | |
1782 | ||
28c9d252 | 1783 | if (debug_relax) |
df406460 NC |
1784 | printf ("shrinking jump/call instruction at address 0x%x" |
1785 | " in section %s\n\n", | |
1786 | (int) dot, sec->name); | |
1787 | ||
1788 | /* Note that we've changed the relocs, section contents, | |
1789 | etc. */ | |
1790 | elf_section_data (sec)->relocs = internal_relocs; | |
1791 | elf_section_data (sec)->this_hdr.contents = contents; | |
1792 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
1793 | ||
1794 | /* Get the instruction code for relaxing. */ | |
1795 | code_lsb = bfd_get_8 (abfd, contents + irel->r_offset); | |
1796 | code_msb = bfd_get_8 (abfd, contents + irel->r_offset + 1); | |
1797 | ||
1798 | /* Mask out the relocation bits. */ | |
1799 | code_msb &= 0x94; | |
1800 | code_lsb &= 0x0E; | |
1801 | if (code_msb == 0x94 && code_lsb == 0x0E) | |
1802 | { | |
1803 | /* we are changing call -> rcall . */ | |
1804 | bfd_put_8 (abfd, 0x00, contents + irel->r_offset); | |
1805 | bfd_put_8 (abfd, 0xD0, contents + irel->r_offset + 1); | |
1806 | } | |
1807 | else if (code_msb == 0x94 && code_lsb == 0x0C) | |
1808 | { | |
1809 | /* we are changeing jump -> rjmp. */ | |
1810 | bfd_put_8 (abfd, 0x00, contents + irel->r_offset); | |
1811 | bfd_put_8 (abfd, 0xC0, contents + irel->r_offset + 1); | |
1812 | } | |
4cdc7696 | 1813 | else |
df406460 NC |
1814 | abort (); |
1815 | ||
1816 | /* Fix the relocation's type. */ | |
1817 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
1818 | R_AVR_13_PCREL); | |
1819 | ||
1820 | /* Check for the vector section. There we don't want to | |
1821 | modify the ordering! */ | |
1822 | ||
1823 | if (!strcmp (sec->name,".vectors") | |
1824 | || !strcmp (sec->name,".jumptables")) | |
1825 | { | |
1826 | /* Let's insert a nop. */ | |
1827 | bfd_put_8 (abfd, 0x00, contents + irel->r_offset + 2); | |
1828 | bfd_put_8 (abfd, 0x00, contents + irel->r_offset + 3); | |
1829 | } | |
1830 | else | |
1831 | { | |
1832 | /* Delete two bytes of data. */ | |
1833 | if (!elf32_avr_relax_delete_bytes (abfd, sec, | |
1834 | irel->r_offset + 2, 2)) | |
1835 | goto error_return; | |
1836 | ||
1837 | /* That will change things, so, we should relax again. | |
1838 | Note that this is not required, and it may be slow. */ | |
1839 | *again = TRUE; | |
1840 | } | |
1841 | } | |
1842 | } | |
4cdc7696 | 1843 | |
df406460 NC |
1844 | default: |
1845 | { | |
1846 | unsigned char code_msb; | |
1847 | unsigned char code_lsb; | |
1848 | bfd_vma dot; | |
1849 | ||
1850 | code_msb = bfd_get_8 (abfd, contents + irel->r_offset + 1); | |
1851 | code_lsb = bfd_get_8 (abfd, contents + irel->r_offset + 0); | |
1852 | ||
1853 | /* Get the address of this instruction. */ | |
1854 | dot = (sec->output_section->vma | |
1855 | + sec->output_offset + irel->r_offset); | |
4cdc7696 NC |
1856 | |
1857 | /* Here we look for rcall/ret or call/ret sequences that could be | |
28c9d252 NC |
1858 | safely replaced by rjmp/ret or jmp/ret. */ |
1859 | if (((code_msb & 0xf0) == 0xd0) | |
1860 | && avr_replace_call_ret_sequences) | |
df406460 NC |
1861 | { |
1862 | /* This insn is a rcall. */ | |
1863 | unsigned char next_insn_msb = 0; | |
1864 | unsigned char next_insn_lsb = 0; | |
1865 | ||
1866 | if (irel->r_offset + 3 < sec->size) | |
1867 | { | |
4cdc7696 | 1868 | next_insn_msb = |
df406460 | 1869 | bfd_get_8 (abfd, contents + irel->r_offset + 3); |
4cdc7696 | 1870 | next_insn_lsb = |
df406460 NC |
1871 | bfd_get_8 (abfd, contents + irel->r_offset + 2); |
1872 | } | |
4cdc7696 NC |
1873 | |
1874 | if ((0x95 == next_insn_msb) && (0x08 == next_insn_lsb)) | |
df406460 NC |
1875 | { |
1876 | /* The next insn is a ret. We now convert the rcall insn | |
1877 | into a rjmp instruction. */ | |
df406460 NC |
1878 | code_msb &= 0xef; |
1879 | bfd_put_8 (abfd, code_msb, contents + irel->r_offset + 1); | |
28c9d252 | 1880 | if (debug_relax) |
df406460 NC |
1881 | printf ("converted rcall/ret sequence at address 0x%x" |
1882 | " into rjmp/ret sequence. Section is %s\n\n", | |
1883 | (int) dot, sec->name); | |
1884 | *again = TRUE; | |
1885 | break; | |
1886 | } | |
1887 | } | |
1888 | else if ((0x94 == (code_msb & 0xfe)) | |
28c9d252 NC |
1889 | && (0x0e == (code_lsb & 0x0e)) |
1890 | && avr_replace_call_ret_sequences) | |
df406460 NC |
1891 | { |
1892 | /* This insn is a call. */ | |
1893 | unsigned char next_insn_msb = 0; | |
1894 | unsigned char next_insn_lsb = 0; | |
1895 | ||
1896 | if (irel->r_offset + 5 < sec->size) | |
1897 | { | |
1898 | next_insn_msb = | |
1899 | bfd_get_8 (abfd, contents + irel->r_offset + 5); | |
1900 | next_insn_lsb = | |
1901 | bfd_get_8 (abfd, contents + irel->r_offset + 4); | |
1902 | } | |
4cdc7696 | 1903 | |
df406460 NC |
1904 | if ((0x95 == next_insn_msb) && (0x08 == next_insn_lsb)) |
1905 | { | |
1906 | /* The next insn is a ret. We now convert the call insn | |
1907 | into a jmp instruction. */ | |
1908 | ||
1909 | code_lsb &= 0xfd; | |
1910 | bfd_put_8 (abfd, code_lsb, contents + irel->r_offset); | |
28c9d252 | 1911 | if (debug_relax) |
df406460 NC |
1912 | printf ("converted call/ret sequence at address 0x%x" |
1913 | " into jmp/ret sequence. Section is %s\n\n", | |
1914 | (int) dot, sec->name); | |
1915 | *again = TRUE; | |
1916 | break; | |
1917 | } | |
1918 | } | |
4cdc7696 NC |
1919 | else if ((0xc0 == (code_msb & 0xf0)) |
1920 | || ((0x94 == (code_msb & 0xfe)) | |
df406460 NC |
1921 | && (0x0c == (code_lsb & 0x0e)))) |
1922 | { | |
4cdc7696 | 1923 | /* This insn is a rjmp or a jmp. */ |
df406460 NC |
1924 | unsigned char next_insn_msb = 0; |
1925 | unsigned char next_insn_lsb = 0; | |
1926 | int insn_size; | |
1927 | ||
1928 | if (0xc0 == (code_msb & 0xf0)) | |
1929 | insn_size = 2; /* rjmp insn */ | |
1930 | else | |
1931 | insn_size = 4; /* jmp insn */ | |
1932 | ||
1933 | if (irel->r_offset + insn_size + 1 < sec->size) | |
1934 | { | |
4cdc7696 NC |
1935 | next_insn_msb = |
1936 | bfd_get_8 (abfd, contents + irel->r_offset | |
df406460 | 1937 | + insn_size + 1); |
4cdc7696 NC |
1938 | next_insn_lsb = |
1939 | bfd_get_8 (abfd, contents + irel->r_offset | |
df406460 NC |
1940 | + insn_size); |
1941 | } | |
1942 | ||
1943 | if ((0x95 == next_insn_msb) && (0x08 == next_insn_lsb)) | |
1944 | { | |
1945 | /* The next insn is a ret. We possibly could delete | |
1946 | this ret. First we need to check for preceeding | |
1947 | sbis/sbic/sbrs or cpse "skip" instructions. */ | |
1948 | ||
1949 | int there_is_preceeding_non_skip_insn = 1; | |
1950 | bfd_vma address_of_ret; | |
1951 | ||
1952 | address_of_ret = dot + insn_size; | |
1953 | ||
28c9d252 | 1954 | if (debug_relax && (insn_size == 2)) |
4cdc7696 | 1955 | printf ("found rjmp / ret sequence at address 0x%x\n", |
df406460 | 1956 | (int) dot); |
28c9d252 | 1957 | if (debug_relax && (insn_size == 4)) |
4cdc7696 | 1958 | printf ("found jmp / ret sequence at address 0x%x\n", |
df406460 NC |
1959 | (int) dot); |
1960 | ||
1961 | /* We have to make sure that there is a preceeding insn. */ | |
1962 | if (irel->r_offset >= 2) | |
1963 | { | |
1964 | unsigned char preceeding_msb; | |
1965 | unsigned char preceeding_lsb; | |
4cdc7696 | 1966 | preceeding_msb = |
df406460 | 1967 | bfd_get_8 (abfd, contents + irel->r_offset - 1); |
4cdc7696 | 1968 | preceeding_lsb = |
df406460 NC |
1969 | bfd_get_8 (abfd, contents + irel->r_offset - 2); |
1970 | ||
1971 | /* sbic. */ | |
4cdc7696 | 1972 | if (0x99 == preceeding_msb) |
df406460 NC |
1973 | there_is_preceeding_non_skip_insn = 0; |
1974 | ||
1975 | /* sbis. */ | |
4cdc7696 | 1976 | if (0x9b == preceeding_msb) |
df406460 NC |
1977 | there_is_preceeding_non_skip_insn = 0; |
1978 | ||
1979 | /* sbrc */ | |
1980 | if ((0xfc == (preceeding_msb & 0xfe) | |
1981 | && (0x00 == (preceeding_lsb & 0x08)))) | |
1982 | there_is_preceeding_non_skip_insn = 0; | |
1983 | ||
4cdc7696 | 1984 | /* sbrs */ |
df406460 NC |
1985 | if ((0xfe == (preceeding_msb & 0xfe) |
1986 | && (0x00 == (preceeding_lsb & 0x08)))) | |
1987 | there_is_preceeding_non_skip_insn = 0; | |
4cdc7696 | 1988 | |
df406460 NC |
1989 | /* cpse */ |
1990 | if (0x10 == (preceeding_msb & 0xfc)) | |
1991 | there_is_preceeding_non_skip_insn = 0; | |
4cdc7696 | 1992 | |
df406460 | 1993 | if (there_is_preceeding_non_skip_insn == 0) |
28c9d252 | 1994 | if (debug_relax) |
df406460 NC |
1995 | printf ("preceeding skip insn prevents deletion of" |
1996 | " ret insn at addr 0x%x in section %s\n", | |
1997 | (int) dot + 2, sec->name); | |
1998 | } | |
1999 | else | |
2000 | { | |
2001 | /* There is no previous instruction. */ | |
2002 | there_is_preceeding_non_skip_insn = 0; | |
4cdc7696 | 2003 | } |
df406460 NC |
2004 | |
2005 | if (there_is_preceeding_non_skip_insn) | |
2006 | { | |
2007 | /* We now only have to make sure that there is no | |
2008 | local label defined at the address of the ret | |
2009 | instruction and that there is no local relocation | |
2010 | in this section pointing to the ret. */ | |
2011 | ||
2012 | int deleting_ret_is_safe = 1; | |
4cdc7696 | 2013 | unsigned int section_offset_of_ret_insn = |
df406460 NC |
2014 | irel->r_offset + insn_size; |
2015 | Elf_Internal_Sym *isym, *isymend; | |
2016 | unsigned int sec_shndx; | |
4cdc7696 NC |
2017 | |
2018 | sec_shndx = | |
2019 | _bfd_elf_section_from_bfd_section (abfd, sec); | |
df406460 NC |
2020 | |
2021 | /* Check for local symbols. */ | |
2022 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; | |
2023 | isymend = isym + symtab_hdr->sh_info; | |
2024 | for (; isym < isymend; isym++) | |
2025 | { | |
2026 | if (isym->st_value == section_offset_of_ret_insn | |
2027 | && isym->st_shndx == sec_shndx) | |
2028 | { | |
2029 | deleting_ret_is_safe = 0; | |
28c9d252 | 2030 | if (debug_relax) |
df406460 NC |
2031 | printf ("local label prevents deletion of ret " |
2032 | "insn at address 0x%x\n", | |
2033 | (int) dot + insn_size); | |
2034 | } | |
2035 | } | |
2036 | ||
2037 | /* Now check for global symbols. */ | |
2038 | { | |
2039 | int symcount; | |
2040 | struct elf_link_hash_entry **sym_hashes; | |
2041 | struct elf_link_hash_entry **end_hashes; | |
2042 | ||
4cdc7696 | 2043 | symcount = (symtab_hdr->sh_size |
df406460 NC |
2044 | / sizeof (Elf32_External_Sym) |
2045 | - symtab_hdr->sh_info); | |
2046 | sym_hashes = elf_sym_hashes (abfd); | |
2047 | end_hashes = sym_hashes + symcount; | |
2048 | for (; sym_hashes < end_hashes; sym_hashes++) | |
2049 | { | |
4cdc7696 | 2050 | struct elf_link_hash_entry *sym_hash = |
df406460 NC |
2051 | *sym_hashes; |
2052 | if ((sym_hash->root.type == bfd_link_hash_defined | |
4cdc7696 NC |
2053 | || sym_hash->root.type == |
2054 | bfd_link_hash_defweak) | |
df406460 | 2055 | && sym_hash->root.u.def.section == sec |
4cdc7696 | 2056 | && sym_hash->root.u.def.value == section_offset_of_ret_insn) |
df406460 NC |
2057 | { |
2058 | deleting_ret_is_safe = 0; | |
28c9d252 | 2059 | if (debug_relax) |
df406460 NC |
2060 | printf ("global label prevents deletion of " |
2061 | "ret insn at address 0x%x\n", | |
2062 | (int) dot + insn_size); | |
2063 | } | |
2064 | } | |
2065 | } | |
2066 | /* Now we check for relocations pointing to ret. */ | |
2067 | { | |
2068 | Elf_Internal_Rela *irel; | |
2069 | Elf_Internal_Rela *relend; | |
2070 | Elf_Internal_Shdr *symtab_hdr; | |
2071 | ||
4cdc7696 NC |
2072 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
2073 | relend = elf_section_data (sec)->relocs | |
df406460 NC |
2074 | + sec->reloc_count; |
2075 | ||
4cdc7696 | 2076 | for (irel = elf_section_data (sec)->relocs; |
df406460 NC |
2077 | irel < relend; irel++) |
2078 | { | |
2079 | bfd_vma reloc_target = 0; | |
2080 | bfd_vma symval; | |
2081 | Elf_Internal_Sym *isymbuf = NULL; | |
4cdc7696 NC |
2082 | |
2083 | /* Read this BFD's local symbols if we haven't | |
df406460 NC |
2084 | done so already. */ |
2085 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) | |
2086 | { | |
4cdc7696 | 2087 | isymbuf = (Elf_Internal_Sym *) |
df406460 NC |
2088 | symtab_hdr->contents; |
2089 | if (isymbuf == NULL) | |
4cdc7696 NC |
2090 | isymbuf = bfd_elf_get_elf_syms |
2091 | (abfd, | |
2092 | symtab_hdr, | |
2093 | symtab_hdr->sh_info, 0, | |
2094 | NULL, NULL, NULL); | |
df406460 NC |
2095 | if (isymbuf == NULL) |
2096 | break; | |
2097 | } | |
4cdc7696 NC |
2098 | |
2099 | /* Get the value of the symbol referred to | |
df406460 | 2100 | by the reloc. */ |
4cdc7696 | 2101 | if (ELF32_R_SYM (irel->r_info) |
df406460 NC |
2102 | < symtab_hdr->sh_info) |
2103 | { | |
2104 | /* A local symbol. */ | |
2105 | Elf_Internal_Sym *isym; | |
2106 | asection *sym_sec; | |
2107 | ||
4cdc7696 | 2108 | isym = isymbuf |
df406460 | 2109 | + ELF32_R_SYM (irel->r_info); |
4cdc7696 NC |
2110 | sym_sec = bfd_section_from_elf_index |
2111 | (abfd, isym->st_shndx); | |
2112 | symval = isym->st_value; | |
2113 | ||
2114 | /* If the reloc is absolute, it will not | |
df406460 NC |
2115 | have a symbol or section associated |
2116 | with it. */ | |
4cdc7696 | 2117 | |
df406460 | 2118 | if (sym_sec) |
4cdc7696 NC |
2119 | { |
2120 | symval += | |
df406460 NC |
2121 | sym_sec->output_section->vma |
2122 | + sym_sec->output_offset; | |
2123 | reloc_target = symval + irel->r_addend; | |
2124 | } | |
2125 | else | |
2126 | { | |
2127 | reloc_target = symval + irel->r_addend; | |
4cdc7696 | 2128 | /* Reference symbol is absolute. */ |
df406460 NC |
2129 | } |
2130 | } | |
4cdc7696 NC |
2131 | /* else ... reference symbol is extern. */ |
2132 | ||
df406460 | 2133 | if (address_of_ret == reloc_target) |
4cdc7696 | 2134 | { |
df406460 | 2135 | deleting_ret_is_safe = 0; |
28c9d252 | 2136 | if (debug_relax) |
df406460 NC |
2137 | printf ("ret from " |
2138 | "rjmp/jmp ret sequence at address" | |
2139 | " 0x%x could not be deleted. ret" | |
2140 | " is target of a relocation.\n", | |
2141 | (int) address_of_ret); | |
2142 | } | |
2143 | } | |
2144 | } | |
2145 | ||
2146 | if (deleting_ret_is_safe) | |
2147 | { | |
28c9d252 | 2148 | if (debug_relax) |
df406460 NC |
2149 | printf ("unreachable ret instruction " |
2150 | "at address 0x%x deleted.\n", | |
2151 | (int) dot + insn_size); | |
4cdc7696 | 2152 | |
df406460 NC |
2153 | /* Delete two bytes of data. */ |
2154 | if (!elf32_avr_relax_delete_bytes (abfd, sec, | |
2155 | irel->r_offset + insn_size, 2)) | |
2156 | goto error_return; | |
2157 | ||
4cdc7696 NC |
2158 | /* That will change things, so, we should relax |
2159 | again. Note that this is not required, and it | |
df406460 | 2160 | may be slow. */ |
df406460 NC |
2161 | *again = TRUE; |
2162 | break; | |
2163 | } | |
2164 | } | |
4cdc7696 NC |
2165 | |
2166 | } | |
2167 | } | |
df406460 NC |
2168 | break; |
2169 | } | |
2170 | } | |
2171 | } | |
2172 | ||
2173 | if (contents != NULL | |
2174 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2175 | { | |
2176 | if (! link_info->keep_memory) | |
2177 | free (contents); | |
2178 | else | |
2179 | { | |
2180 | /* Cache the section contents for elf_link_input_bfd. */ | |
2181 | elf_section_data (sec)->this_hdr.contents = contents; | |
2182 | } | |
2183 | } | |
2184 | ||
2185 | if (internal_relocs != NULL | |
2186 | && elf_section_data (sec)->relocs != internal_relocs) | |
2187 | free (internal_relocs); | |
2188 | ||
2189 | return TRUE; | |
2190 | ||
2191 | error_return: | |
2192 | if (isymbuf != NULL | |
2193 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
2194 | free (isymbuf); | |
2195 | if (contents != NULL | |
2196 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2197 | free (contents); | |
2198 | if (internal_relocs != NULL | |
2199 | && elf_section_data (sec)->relocs != internal_relocs) | |
2200 | free (internal_relocs); | |
2201 | ||
4cdc7696 | 2202 | return FALSE; |
df406460 NC |
2203 | } |
2204 | ||
2205 | /* This is a version of bfd_generic_get_relocated_section_contents | |
4cdc7696 | 2206 | which uses elf32_avr_relocate_section. |
df406460 | 2207 | |
4cdc7696 | 2208 | For avr it's essentially a cut and paste taken from the H8300 port. |
df406460 | 2209 | The author of the relaxation support patch for avr had absolutely no |
4cdc7696 | 2210 | clue what is happening here but found out that this part of the code |
df406460 NC |
2211 | seems to be important. */ |
2212 | ||
2213 | static bfd_byte * | |
2214 | elf32_avr_get_relocated_section_contents (bfd *output_bfd, | |
2215 | struct bfd_link_info *link_info, | |
2216 | struct bfd_link_order *link_order, | |
2217 | bfd_byte *data, | |
2218 | bfd_boolean relocatable, | |
2219 | asymbol **symbols) | |
2220 | { | |
2221 | Elf_Internal_Shdr *symtab_hdr; | |
2222 | asection *input_section = link_order->u.indirect.section; | |
2223 | bfd *input_bfd = input_section->owner; | |
2224 | asection **sections = NULL; | |
2225 | Elf_Internal_Rela *internal_relocs = NULL; | |
2226 | Elf_Internal_Sym *isymbuf = NULL; | |
2227 | ||
2228 | /* We only need to handle the case of relaxing, or of having a | |
2229 | particular set of section contents, specially. */ | |
2230 | if (relocatable | |
2231 | || elf_section_data (input_section)->this_hdr.contents == NULL) | |
2232 | return bfd_generic_get_relocated_section_contents (output_bfd, link_info, | |
2233 | link_order, data, | |
2234 | relocatable, | |
2235 | symbols); | |
2236 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
2237 | ||
2238 | memcpy (data, elf_section_data (input_section)->this_hdr.contents, | |
2239 | (size_t) input_section->size); | |
2240 | ||
2241 | if ((input_section->flags & SEC_RELOC) != 0 | |
2242 | && input_section->reloc_count > 0) | |
2243 | { | |
2244 | asection **secpp; | |
2245 | Elf_Internal_Sym *isym, *isymend; | |
2246 | bfd_size_type amt; | |
2247 | ||
2248 | internal_relocs = (_bfd_elf_link_read_relocs | |
4cdc7696 | 2249 | (input_bfd, input_section, NULL, NULL, FALSE)); |
df406460 NC |
2250 | if (internal_relocs == NULL) |
2251 | goto error_return; | |
2252 | ||
2253 | if (symtab_hdr->sh_info != 0) | |
2254 | { | |
2255 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
2256 | if (isymbuf == NULL) | |
2257 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, | |
2258 | symtab_hdr->sh_info, 0, | |
2259 | NULL, NULL, NULL); | |
2260 | if (isymbuf == NULL) | |
2261 | goto error_return; | |
2262 | } | |
2263 | ||
2264 | amt = symtab_hdr->sh_info; | |
2265 | amt *= sizeof (asection *); | |
4cdc7696 | 2266 | sections = bfd_malloc (amt); |
df406460 NC |
2267 | if (sections == NULL && amt != 0) |
2268 | goto error_return; | |
2269 | ||
2270 | isymend = isymbuf + symtab_hdr->sh_info; | |
2271 | for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp) | |
2272 | { | |
2273 | asection *isec; | |
2274 | ||
2275 | if (isym->st_shndx == SHN_UNDEF) | |
2276 | isec = bfd_und_section_ptr; | |
2277 | else if (isym->st_shndx == SHN_ABS) | |
2278 | isec = bfd_abs_section_ptr; | |
2279 | else if (isym->st_shndx == SHN_COMMON) | |
2280 | isec = bfd_com_section_ptr; | |
2281 | else | |
2282 | isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx); | |
2283 | ||
2284 | *secpp = isec; | |
2285 | } | |
2286 | ||
2287 | if (! elf32_avr_relocate_section (output_bfd, link_info, input_bfd, | |
2288 | input_section, data, internal_relocs, | |
2289 | isymbuf, sections)) | |
2290 | goto error_return; | |
2291 | ||
2292 | if (sections != NULL) | |
2293 | free (sections); | |
2294 | if (isymbuf != NULL | |
2295 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
2296 | free (isymbuf); | |
2297 | if (elf_section_data (input_section)->relocs != internal_relocs) | |
2298 | free (internal_relocs); | |
2299 | } | |
2300 | ||
2301 | return data; | |
2302 | ||
2303 | error_return: | |
2304 | if (sections != NULL) | |
2305 | free (sections); | |
2306 | if (isymbuf != NULL | |
2307 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
2308 | free (isymbuf); | |
2309 | if (internal_relocs != NULL | |
2310 | && elf_section_data (input_section)->relocs != internal_relocs) | |
2311 | free (internal_relocs); | |
2312 | return NULL; | |
2313 | } | |
2314 | ||
2315 | ||
28c9d252 NC |
2316 | /* Determines the hash entry name for a particular reloc. It consists of |
2317 | the identifier of the symbol section and the added reloc addend and | |
2318 | symbol offset relative to the section the symbol is attached to. */ | |
2319 | ||
2320 | static char * | |
2321 | avr_stub_name (const asection *symbol_section, | |
2322 | const bfd_vma symbol_offset, | |
2323 | const Elf_Internal_Rela *rela) | |
2324 | { | |
2325 | char *stub_name; | |
2326 | bfd_size_type len; | |
2327 | ||
2328 | len = 8 + 1 + 8 + 1 + 1; | |
2329 | stub_name = bfd_malloc (len); | |
2330 | ||
2331 | sprintf (stub_name, "%08x+%08x", | |
2332 | symbol_section->id & 0xffffffff, | |
2333 | (unsigned int) ((rela->r_addend & 0xffffffff) + symbol_offset)); | |
2334 | ||
2335 | return stub_name; | |
2336 | } | |
2337 | ||
2338 | ||
2339 | /* Add a new stub entry to the stub hash. Not all fields of the new | |
2340 | stub entry are initialised. */ | |
2341 | ||
2342 | static struct elf32_avr_stub_hash_entry * | |
2343 | avr_add_stub (const char *stub_name, | |
2344 | struct elf32_avr_link_hash_table *htab) | |
2345 | { | |
2346 | struct elf32_avr_stub_hash_entry *hsh; | |
2347 | ||
2348 | /* Enter this entry into the linker stub hash table. */ | |
2349 | hsh = avr_stub_hash_lookup (&htab->bstab, stub_name, TRUE, FALSE); | |
2350 | ||
2351 | if (hsh == NULL) | |
2352 | { | |
2353 | (*_bfd_error_handler) (_("%B: cannot create stub entry %s"), | |
2354 | NULL, stub_name); | |
2355 | return NULL; | |
2356 | } | |
2357 | ||
2358 | hsh->stub_offset = 0; | |
2359 | return hsh; | |
2360 | } | |
2361 | ||
2362 | /* We assume that there is already space allocated for the stub section | |
2363 | contents and that before building the stubs the section size is | |
2364 | initialized to 0. We assume that within the stub hash table entry, | |
2365 | the absolute position of the jmp target has been written in the | |
2366 | target_value field. We write here the offset of the generated jmp insn | |
2367 | relative to the trampoline section start to the stub_offset entry in | |
2368 | the stub hash table entry. */ | |
2369 | ||
2370 | static bfd_boolean | |
2371 | avr_build_one_stub (struct bfd_hash_entry *bh, void *in_arg) | |
2372 | { | |
2373 | struct elf32_avr_stub_hash_entry *hsh; | |
2374 | struct bfd_link_info *info; | |
2375 | struct elf32_avr_link_hash_table *htab; | |
2376 | bfd *stub_bfd; | |
2377 | bfd_byte *loc; | |
2378 | bfd_vma target; | |
2379 | bfd_vma starget; | |
2380 | ||
2381 | /* Basic opcode */ | |
2382 | bfd_vma jmp_insn = 0x0000940c; | |
2383 | ||
2384 | /* Massage our args to the form they really have. */ | |
2385 | hsh = avr_stub_hash_entry (bh); | |
2386 | ||
2387 | if (!hsh->is_actually_needed) | |
2388 | return TRUE; | |
2389 | ||
2390 | info = (struct bfd_link_info *) in_arg; | |
2391 | ||
2392 | htab = avr_link_hash_table (info); | |
64ee10b6 NC |
2393 | if (htab == NULL) |
2394 | return FALSE; | |
28c9d252 NC |
2395 | |
2396 | target = hsh->target_value; | |
2397 | ||
2398 | /* Make a note of the offset within the stubs for this entry. */ | |
2399 | hsh->stub_offset = htab->stub_sec->size; | |
2400 | loc = htab->stub_sec->contents + hsh->stub_offset; | |
2401 | ||
2402 | stub_bfd = htab->stub_sec->owner; | |
2403 | ||
2404 | if (debug_stubs) | |
2405 | printf ("Building one Stub. Address: 0x%x, Offset: 0x%x\n", | |
2406 | (unsigned int) target, | |
2407 | (unsigned int) hsh->stub_offset); | |
2408 | ||
2409 | /* We now have to add the information on the jump target to the bare | |
2410 | opcode bits already set in jmp_insn. */ | |
2411 | ||
2412 | /* Check for the alignment of the address. */ | |
2413 | if (target & 1) | |
2414 | return FALSE; | |
2415 | ||
2416 | starget = target >> 1; | |
2417 | jmp_insn |= ((starget & 0x10000) | ((starget << 3) & 0x1f00000)) >> 16; | |
2418 | bfd_put_16 (stub_bfd, jmp_insn, loc); | |
2419 | bfd_put_16 (stub_bfd, (bfd_vma) starget & 0xffff, loc + 2); | |
2420 | ||
2421 | htab->stub_sec->size += 4; | |
2422 | ||
2423 | /* Now add the entries in the address mapping table if there is still | |
2424 | space left. */ | |
2425 | { | |
2426 | unsigned int nr; | |
2427 | ||
2428 | nr = htab->amt_entry_cnt + 1; | |
2429 | if (nr <= htab->amt_max_entry_cnt) | |
2430 | { | |
2431 | htab->amt_entry_cnt = nr; | |
2432 | ||
2433 | htab->amt_stub_offsets[nr - 1] = hsh->stub_offset; | |
2434 | htab->amt_destination_addr[nr - 1] = target; | |
2435 | } | |
2436 | } | |
2437 | ||
2438 | return TRUE; | |
2439 | } | |
2440 | ||
2441 | static bfd_boolean | |
2442 | avr_mark_stub_not_to_be_necessary (struct bfd_hash_entry *bh, | |
2443 | void *in_arg) | |
2444 | { | |
2445 | struct elf32_avr_stub_hash_entry *hsh; | |
2446 | struct elf32_avr_link_hash_table *htab; | |
2447 | ||
2448 | htab = in_arg; | |
2449 | hsh = avr_stub_hash_entry (bh); | |
2450 | hsh->is_actually_needed = FALSE; | |
2451 | ||
2452 | return TRUE; | |
2453 | } | |
2454 | ||
2455 | static bfd_boolean | |
2456 | avr_size_one_stub (struct bfd_hash_entry *bh, void *in_arg) | |
2457 | { | |
2458 | struct elf32_avr_stub_hash_entry *hsh; | |
2459 | struct elf32_avr_link_hash_table *htab; | |
2460 | int size; | |
2461 | ||
2462 | /* Massage our args to the form they really have. */ | |
2463 | hsh = avr_stub_hash_entry (bh); | |
2464 | htab = in_arg; | |
2465 | ||
2466 | if (hsh->is_actually_needed) | |
2467 | size = 4; | |
2468 | else | |
2469 | size = 0; | |
2470 | ||
2471 | htab->stub_sec->size += size; | |
2472 | return TRUE; | |
2473 | } | |
2474 | ||
2475 | void | |
2476 | elf32_avr_setup_params (struct bfd_link_info *info, | |
2477 | bfd *avr_stub_bfd, | |
2478 | asection *avr_stub_section, | |
2479 | bfd_boolean no_stubs, | |
2480 | bfd_boolean deb_stubs, | |
2481 | bfd_boolean deb_relax, | |
2482 | bfd_vma pc_wrap_around, | |
2483 | bfd_boolean call_ret_replacement) | |
2484 | { | |
64ee10b6 | 2485 | struct elf32_avr_link_hash_table *htab = avr_link_hash_table (info); |
28c9d252 | 2486 | |
64ee10b6 NC |
2487 | if (htab == NULL) |
2488 | return; | |
28c9d252 NC |
2489 | htab->stub_sec = avr_stub_section; |
2490 | htab->stub_bfd = avr_stub_bfd; | |
2491 | htab->no_stubs = no_stubs; | |
2492 | ||
2493 | debug_relax = deb_relax; | |
2494 | debug_stubs = deb_stubs; | |
2495 | avr_pc_wrap_around = pc_wrap_around; | |
2496 | avr_replace_call_ret_sequences = call_ret_replacement; | |
2497 | } | |
2498 | ||
2499 | ||
2500 | /* Set up various things so that we can make a list of input sections | |
2501 | for each output section included in the link. Returns -1 on error, | |
2502 | 0 when no stubs will be needed, and 1 on success. It also sets | |
2503 | information on the stubs bfd and the stub section in the info | |
2504 | struct. */ | |
2505 | ||
2506 | int | |
2507 | elf32_avr_setup_section_lists (bfd *output_bfd, | |
2508 | struct bfd_link_info *info) | |
2509 | { | |
2510 | bfd *input_bfd; | |
2511 | unsigned int bfd_count; | |
2512 | int top_id, top_index; | |
2513 | asection *section; | |
2514 | asection **input_list, **list; | |
2515 | bfd_size_type amt; | |
2516 | struct elf32_avr_link_hash_table *htab = avr_link_hash_table(info); | |
2517 | ||
64ee10b6 | 2518 | if (htab == NULL || htab->no_stubs) |
28c9d252 NC |
2519 | return 0; |
2520 | ||
2521 | /* Count the number of input BFDs and find the top input section id. */ | |
2522 | for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; | |
2523 | input_bfd != NULL; | |
2524 | input_bfd = input_bfd->link_next) | |
2525 | { | |
2526 | bfd_count += 1; | |
2527 | for (section = input_bfd->sections; | |
2528 | section != NULL; | |
2529 | section = section->next) | |
2530 | if (top_id < section->id) | |
2531 | top_id = section->id; | |
2532 | } | |
2533 | ||
2534 | htab->bfd_count = bfd_count; | |
2535 | ||
2536 | /* We can't use output_bfd->section_count here to find the top output | |
2537 | section index as some sections may have been removed, and | |
2538 | strip_excluded_output_sections doesn't renumber the indices. */ | |
2539 | for (section = output_bfd->sections, top_index = 0; | |
2540 | section != NULL; | |
2541 | section = section->next) | |
2542 | if (top_index < section->index) | |
2543 | top_index = section->index; | |
2544 | ||
2545 | htab->top_index = top_index; | |
2546 | amt = sizeof (asection *) * (top_index + 1); | |
2547 | input_list = bfd_malloc (amt); | |
2548 | htab->input_list = input_list; | |
2549 | if (input_list == NULL) | |
2550 | return -1; | |
2551 | ||
2552 | /* For sections we aren't interested in, mark their entries with a | |
2553 | value we can check later. */ | |
2554 | list = input_list + top_index; | |
2555 | do | |
2556 | *list = bfd_abs_section_ptr; | |
2557 | while (list-- != input_list); | |
2558 | ||
2559 | for (section = output_bfd->sections; | |
2560 | section != NULL; | |
2561 | section = section->next) | |
2562 | if ((section->flags & SEC_CODE) != 0) | |
2563 | input_list[section->index] = NULL; | |
2564 | ||
2565 | return 1; | |
2566 | } | |
2567 | ||
2568 | ||
2569 | /* Read in all local syms for all input bfds, and create hash entries | |
2570 | for export stubs if we are building a multi-subspace shared lib. | |
2571 | Returns -1 on error, 0 otherwise. */ | |
2572 | ||
2573 | static int | |
2574 | get_local_syms (bfd *input_bfd, struct bfd_link_info *info) | |
2575 | { | |
2576 | unsigned int bfd_indx; | |
2577 | Elf_Internal_Sym *local_syms, **all_local_syms; | |
2578 | struct elf32_avr_link_hash_table *htab = avr_link_hash_table (info); | |
2579 | ||
64ee10b6 NC |
2580 | if (htab == NULL) |
2581 | return -1; | |
2582 | ||
28c9d252 NC |
2583 | /* We want to read in symbol extension records only once. To do this |
2584 | we need to read in the local symbols in parallel and save them for | |
2585 | later use; so hold pointers to the local symbols in an array. */ | |
2586 | bfd_size_type amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count; | |
2587 | all_local_syms = bfd_zmalloc (amt); | |
2588 | htab->all_local_syms = all_local_syms; | |
2589 | if (all_local_syms == NULL) | |
2590 | return -1; | |
2591 | ||
2592 | /* Walk over all the input BFDs, swapping in local symbols. | |
2593 | If we are creating a shared library, create hash entries for the | |
2594 | export stubs. */ | |
2595 | for (bfd_indx = 0; | |
2596 | input_bfd != NULL; | |
2597 | input_bfd = input_bfd->link_next, bfd_indx++) | |
2598 | { | |
2599 | Elf_Internal_Shdr *symtab_hdr; | |
2600 | ||
2601 | /* We'll need the symbol table in a second. */ | |
2602 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
2603 | if (symtab_hdr->sh_info == 0) | |
2604 | continue; | |
2605 | ||
2606 | /* We need an array of the local symbols attached to the input bfd. */ | |
2607 | local_syms = (Elf_Internal_Sym *) symtab_hdr->contents; | |
2608 | if (local_syms == NULL) | |
2609 | { | |
2610 | local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, | |
2611 | symtab_hdr->sh_info, 0, | |
2612 | NULL, NULL, NULL); | |
2613 | /* Cache them for elf_link_input_bfd. */ | |
2614 | symtab_hdr->contents = (unsigned char *) local_syms; | |
2615 | } | |
2616 | if (local_syms == NULL) | |
2617 | return -1; | |
2618 | ||
2619 | all_local_syms[bfd_indx] = local_syms; | |
2620 | } | |
2621 | ||
2622 | return 0; | |
2623 | } | |
2624 | ||
2625 | #define ADD_DUMMY_STUBS_FOR_DEBUGGING 0 | |
2626 | ||
2627 | bfd_boolean | |
2628 | elf32_avr_size_stubs (bfd *output_bfd, | |
2629 | struct bfd_link_info *info, | |
2630 | bfd_boolean is_prealloc_run) | |
2631 | { | |
64ee10b6 NC |
2632 | struct elf32_avr_link_hash_table *htab; |
2633 | int stub_changed = 0; | |
28c9d252 | 2634 | |
64ee10b6 NC |
2635 | htab = avr_link_hash_table (info); |
2636 | if (htab == NULL) | |
2637 | return FALSE; | |
28c9d252 | 2638 | |
64ee10b6 NC |
2639 | /* At this point we initialize htab->vector_base |
2640 | To the start of the text output section. */ | |
2641 | htab->vector_base = htab->stub_sec->output_section->vma; | |
28c9d252 | 2642 | |
64ee10b6 NC |
2643 | if (get_local_syms (info->input_bfds, info)) |
2644 | { | |
2645 | if (htab->all_local_syms) | |
2646 | goto error_ret_free_local; | |
2647 | return FALSE; | |
2648 | } | |
28c9d252 NC |
2649 | |
2650 | if (ADD_DUMMY_STUBS_FOR_DEBUGGING) | |
2651 | { | |
2652 | struct elf32_avr_stub_hash_entry *test; | |
2653 | ||
2654 | test = avr_add_stub ("Hugo",htab); | |
2655 | test->target_value = 0x123456; | |
2656 | test->stub_offset = 13; | |
2657 | ||
2658 | test = avr_add_stub ("Hugo2",htab); | |
2659 | test->target_value = 0x84210; | |
2660 | test->stub_offset = 14; | |
2661 | } | |
2662 | ||
2663 | while (1) | |
2664 | { | |
2665 | bfd *input_bfd; | |
2666 | unsigned int bfd_indx; | |
2667 | ||
2668 | /* We will have to re-generate the stub hash table each time anything | |
2669 | in memory has changed. */ | |
2670 | ||
2671 | bfd_hash_traverse (&htab->bstab, avr_mark_stub_not_to_be_necessary, htab); | |
2672 | for (input_bfd = info->input_bfds, bfd_indx = 0; | |
2673 | input_bfd != NULL; | |
2674 | input_bfd = input_bfd->link_next, bfd_indx++) | |
2675 | { | |
2676 | Elf_Internal_Shdr *symtab_hdr; | |
2677 | asection *section; | |
2678 | Elf_Internal_Sym *local_syms; | |
2679 | ||
2680 | /* We'll need the symbol table in a second. */ | |
2681 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
2682 | if (symtab_hdr->sh_info == 0) | |
2683 | continue; | |
2684 | ||
2685 | local_syms = htab->all_local_syms[bfd_indx]; | |
2686 | ||
2687 | /* Walk over each section attached to the input bfd. */ | |
2688 | for (section = input_bfd->sections; | |
2689 | section != NULL; | |
2690 | section = section->next) | |
2691 | { | |
2692 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; | |
2693 | ||
2694 | /* If there aren't any relocs, then there's nothing more | |
2695 | to do. */ | |
2696 | if ((section->flags & SEC_RELOC) == 0 | |
2697 | || section->reloc_count == 0) | |
2698 | continue; | |
2699 | ||
2700 | /* If this section is a link-once section that will be | |
2701 | discarded, then don't create any stubs. */ | |
2702 | if (section->output_section == NULL | |
2703 | || section->output_section->owner != output_bfd) | |
2704 | continue; | |
2705 | ||
2706 | /* Get the relocs. */ | |
2707 | internal_relocs | |
2708 | = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL, | |
2709 | info->keep_memory); | |
2710 | if (internal_relocs == NULL) | |
2711 | goto error_ret_free_local; | |
2712 | ||
2713 | /* Now examine each relocation. */ | |
2714 | irela = internal_relocs; | |
2715 | irelaend = irela + section->reloc_count; | |
2716 | for (; irela < irelaend; irela++) | |
2717 | { | |
2718 | unsigned int r_type, r_indx; | |
2719 | struct elf32_avr_stub_hash_entry *hsh; | |
2720 | asection *sym_sec; | |
2721 | bfd_vma sym_value; | |
2722 | bfd_vma destination; | |
2723 | struct elf_link_hash_entry *hh; | |
2724 | char *stub_name; | |
2725 | ||
2726 | r_type = ELF32_R_TYPE (irela->r_info); | |
2727 | r_indx = ELF32_R_SYM (irela->r_info); | |
2728 | ||
2729 | /* Only look for 16 bit GS relocs. No other reloc will need a | |
2730 | stub. */ | |
2731 | if (!((r_type == R_AVR_16_PM) | |
2732 | || (r_type == R_AVR_LO8_LDI_GS) | |
2733 | || (r_type == R_AVR_HI8_LDI_GS))) | |
2734 | continue; | |
2735 | ||
2736 | /* Now determine the call target, its name, value, | |
2737 | section. */ | |
2738 | sym_sec = NULL; | |
2739 | sym_value = 0; | |
2740 | destination = 0; | |
2741 | hh = NULL; | |
2742 | if (r_indx < symtab_hdr->sh_info) | |
2743 | { | |
2744 | /* It's a local symbol. */ | |
2745 | Elf_Internal_Sym *sym; | |
2746 | Elf_Internal_Shdr *hdr; | |
2747 | ||
2748 | sym = local_syms + r_indx; | |
2749 | hdr = elf_elfsections (input_bfd)[sym->st_shndx]; | |
2750 | sym_sec = hdr->bfd_section; | |
2751 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) | |
2752 | sym_value = sym->st_value; | |
2753 | destination = (sym_value + irela->r_addend | |
2754 | + sym_sec->output_offset | |
2755 | + sym_sec->output_section->vma); | |
2756 | } | |
2757 | else | |
2758 | { | |
2759 | /* It's an external symbol. */ | |
2760 | int e_indx; | |
2761 | ||
2762 | e_indx = r_indx - symtab_hdr->sh_info; | |
2763 | hh = elf_sym_hashes (input_bfd)[e_indx]; | |
2764 | ||
2765 | while (hh->root.type == bfd_link_hash_indirect | |
2766 | || hh->root.type == bfd_link_hash_warning) | |
2767 | hh = (struct elf_link_hash_entry *) | |
2768 | (hh->root.u.i.link); | |
2769 | ||
2770 | if (hh->root.type == bfd_link_hash_defined | |
2771 | || hh->root.type == bfd_link_hash_defweak) | |
2772 | { | |
2773 | sym_sec = hh->root.u.def.section; | |
2774 | sym_value = hh->root.u.def.value; | |
2775 | if (sym_sec->output_section != NULL) | |
2776 | destination = (sym_value + irela->r_addend | |
2777 | + sym_sec->output_offset | |
2778 | + sym_sec->output_section->vma); | |
2779 | } | |
2780 | else if (hh->root.type == bfd_link_hash_undefweak) | |
2781 | { | |
2782 | if (! info->shared) | |
2783 | continue; | |
2784 | } | |
2785 | else if (hh->root.type == bfd_link_hash_undefined) | |
2786 | { | |
2787 | if (! (info->unresolved_syms_in_objects == RM_IGNORE | |
2788 | && (ELF_ST_VISIBILITY (hh->other) | |
2789 | == STV_DEFAULT))) | |
2790 | continue; | |
2791 | } | |
2792 | else | |
2793 | { | |
2794 | bfd_set_error (bfd_error_bad_value); | |
2795 | ||
2796 | error_ret_free_internal: | |
2797 | if (elf_section_data (section)->relocs == NULL) | |
2798 | free (internal_relocs); | |
2799 | goto error_ret_free_local; | |
2800 | } | |
2801 | } | |
2802 | ||
2803 | if (! avr_stub_is_required_for_16_bit_reloc | |
2804 | (destination - htab->vector_base)) | |
2805 | { | |
2806 | if (!is_prealloc_run) | |
2807 | /* We are having a reloc that does't need a stub. */ | |
2808 | continue; | |
2809 | ||
2810 | /* We don't right now know if a stub will be needed. | |
2811 | Let's rather be on the safe side. */ | |
2812 | } | |
2813 | ||
2814 | /* Get the name of this stub. */ | |
2815 | stub_name = avr_stub_name (sym_sec, sym_value, irela); | |
2816 | ||
2817 | if (!stub_name) | |
2818 | goto error_ret_free_internal; | |
2819 | ||
2820 | ||
2821 | hsh = avr_stub_hash_lookup (&htab->bstab, | |
2822 | stub_name, | |
2823 | FALSE, FALSE); | |
2824 | if (hsh != NULL) | |
2825 | { | |
2826 | /* The proper stub has already been created. Mark it | |
2827 | to be used and write the possibly changed destination | |
2828 | value. */ | |
2829 | hsh->is_actually_needed = TRUE; | |
2830 | hsh->target_value = destination; | |
2831 | free (stub_name); | |
2832 | continue; | |
2833 | } | |
2834 | ||
2835 | hsh = avr_add_stub (stub_name, htab); | |
2836 | if (hsh == NULL) | |
2837 | { | |
2838 | free (stub_name); | |
2839 | goto error_ret_free_internal; | |
2840 | } | |
2841 | ||
2842 | hsh->is_actually_needed = TRUE; | |
2843 | hsh->target_value = destination; | |
2844 | ||
2845 | if (debug_stubs) | |
2846 | printf ("Adding stub with destination 0x%x to the" | |
2847 | " hash table.\n", (unsigned int) destination); | |
2848 | if (debug_stubs) | |
2849 | printf ("(Pre-Alloc run: %i)\n", is_prealloc_run); | |
2850 | ||
2851 | stub_changed = TRUE; | |
2852 | } | |
2853 | ||
2854 | /* We're done with the internal relocs, free them. */ | |
2855 | if (elf_section_data (section)->relocs == NULL) | |
2856 | free (internal_relocs); | |
2857 | } | |
2858 | } | |
2859 | ||
2860 | /* Re-Calculate the number of needed stubs. */ | |
2861 | htab->stub_sec->size = 0; | |
2862 | bfd_hash_traverse (&htab->bstab, avr_size_one_stub, htab); | |
2863 | ||
2864 | if (!stub_changed) | |
2865 | break; | |
2866 | ||
2867 | stub_changed = FALSE; | |
2868 | } | |
2869 | ||
2870 | free (htab->all_local_syms); | |
2871 | return TRUE; | |
2872 | ||
2873 | error_ret_free_local: | |
2874 | free (htab->all_local_syms); | |
2875 | return FALSE; | |
2876 | } | |
2877 | ||
2878 | ||
2879 | /* Build all the stubs associated with the current output file. The | |
2880 | stubs are kept in a hash table attached to the main linker hash | |
2881 | table. We also set up the .plt entries for statically linked PIC | |
2882 | functions here. This function is called via hppaelf_finish in the | |
2883 | linker. */ | |
2884 | ||
2885 | bfd_boolean | |
2886 | elf32_avr_build_stubs (struct bfd_link_info *info) | |
2887 | { | |
2888 | asection *stub_sec; | |
2889 | struct bfd_hash_table *table; | |
2890 | struct elf32_avr_link_hash_table *htab; | |
2891 | bfd_size_type total_size = 0; | |
2892 | ||
2893 | htab = avr_link_hash_table (info); | |
64ee10b6 NC |
2894 | if (htab == NULL) |
2895 | return FALSE; | |
28c9d252 NC |
2896 | |
2897 | /* In case that there were several stub sections: */ | |
2898 | for (stub_sec = htab->stub_bfd->sections; | |
2899 | stub_sec != NULL; | |
2900 | stub_sec = stub_sec->next) | |
2901 | { | |
2902 | bfd_size_type size; | |
2903 | ||
2904 | /* Allocate memory to hold the linker stubs. */ | |
2905 | size = stub_sec->size; | |
2906 | total_size += size; | |
2907 | ||
2908 | stub_sec->contents = bfd_zalloc (htab->stub_bfd, size); | |
2909 | if (stub_sec->contents == NULL && size != 0) | |
2910 | return FALSE; | |
2911 | stub_sec->size = 0; | |
2912 | } | |
2913 | ||
2914 | /* Allocate memory for the adress mapping table. */ | |
2915 | htab->amt_entry_cnt = 0; | |
2916 | htab->amt_max_entry_cnt = total_size / 4; | |
2917 | htab->amt_stub_offsets = bfd_malloc (sizeof (bfd_vma) | |
2918 | * htab->amt_max_entry_cnt); | |
2919 | htab->amt_destination_addr = bfd_malloc (sizeof (bfd_vma) | |
2920 | * htab->amt_max_entry_cnt ); | |
2921 | ||
2922 | if (debug_stubs) | |
2923 | printf ("Allocating %i entries in the AMT\n", htab->amt_max_entry_cnt); | |
2924 | ||
2925 | /* Build the stubs as directed by the stub hash table. */ | |
2926 | table = &htab->bstab; | |
2927 | bfd_hash_traverse (table, avr_build_one_stub, info); | |
2928 | ||
2929 | if (debug_stubs) | |
2930 | printf ("Final Stub section Size: %i\n", (int) htab->stub_sec->size); | |
2931 | ||
2932 | return TRUE; | |
2933 | } | |
2934 | ||
adde6300 AM |
2935 | #define ELF_ARCH bfd_arch_avr |
2936 | #define ELF_MACHINE_CODE EM_AVR | |
aa4f99bb | 2937 | #define ELF_MACHINE_ALT1 EM_AVR_OLD |
adde6300 AM |
2938 | #define ELF_MAXPAGESIZE 1 |
2939 | ||
2940 | #define TARGET_LITTLE_SYM bfd_elf32_avr_vec | |
2941 | #define TARGET_LITTLE_NAME "elf32-avr" | |
2942 | ||
28c9d252 NC |
2943 | #define bfd_elf32_bfd_link_hash_table_create elf32_avr_link_hash_table_create |
2944 | #define bfd_elf32_bfd_link_hash_table_free elf32_avr_link_hash_table_free | |
2945 | ||
adde6300 AM |
2946 | #define elf_info_to_howto avr_info_to_howto_rela |
2947 | #define elf_info_to_howto_rel NULL | |
2948 | #define elf_backend_relocate_section elf32_avr_relocate_section | |
adde6300 AM |
2949 | #define elf_backend_check_relocs elf32_avr_check_relocs |
2950 | #define elf_backend_can_gc_sections 1 | |
f0fe0e16 | 2951 | #define elf_backend_rela_normal 1 |
adde6300 AM |
2952 | #define elf_backend_final_write_processing \ |
2953 | bfd_elf_avr_final_write_processing | |
2954 | #define elf_backend_object_p elf32_avr_object_p | |
2955 | ||
df406460 NC |
2956 | #define bfd_elf32_bfd_relax_section elf32_avr_relax_section |
2957 | #define bfd_elf32_bfd_get_relocated_section_contents \ | |
2958 | elf32_avr_get_relocated_section_contents | |
2959 | ||
adde6300 | 2960 | #include "elf32-target.h" |