Commit | Line | Data |
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adde6300 | 1 | /* AVR-specific support for 32-bit ELF |
4dfe6ac6 | 2 | Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, |
dbaa2011 AM |
3 | 2010, 2011, 2012 |
4 | Free Software Foundation, Inc. | |
adde6300 AM |
5 | Contributed by Denis Chertykov <denisc@overta.ru> |
6 | ||
750bce0e | 7 | This file is part of BFD, the Binary File Descriptor library. |
adde6300 | 8 | |
750bce0e NC |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 11 | the Free Software Foundation; either version 3 of the License, or |
750bce0e | 12 | (at your option) any later version. |
adde6300 | 13 | |
750bce0e NC |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
adde6300 | 18 | |
750bce0e NC |
19 | You should have received a copy of the GNU General Public License |
20 | along with this program; if not, write to the Free Software | |
4cdc7696 | 21 | Foundation, Inc., 51 Franklin Street - Fifth Floor, |
df406460 | 22 | Boston, MA 02110-1301, USA. */ |
adde6300 | 23 | |
adde6300 | 24 | #include "sysdep.h" |
3db64b00 | 25 | #include "bfd.h" |
adde6300 AM |
26 | #include "libbfd.h" |
27 | #include "elf-bfd.h" | |
28 | #include "elf/avr.h" | |
28c9d252 NC |
29 | #include "elf32-avr.h" |
30 | ||
31 | /* Enable debugging printout at stdout with this variable. */ | |
32 | static bfd_boolean debug_relax = FALSE; | |
33 | ||
34 | /* Enable debugging printout at stdout with this variable. */ | |
35 | static bfd_boolean debug_stubs = FALSE; | |
36 | ||
37 | /* Hash table initialization and handling. Code is taken from the hppa port | |
38 | and adapted to the needs of AVR. */ | |
39 | ||
40 | /* We use two hash tables to hold information for linking avr objects. | |
41 | ||
4dfe6ac6 | 42 | The first is the elf32_avr_link_hash_table which is derived from the |
28c9d252 NC |
43 | stanard ELF linker hash table. We use this as a place to attach the other |
44 | hash table and some static information. | |
45 | ||
46 | The second is the stub hash table which is derived from the base BFD | |
47 | hash table. The stub hash table holds the information on the linker | |
48 | stubs. */ | |
49 | ||
50 | struct elf32_avr_stub_hash_entry | |
51 | { | |
52 | /* Base hash table entry structure. */ | |
53 | struct bfd_hash_entry bh_root; | |
54 | ||
55 | /* Offset within stub_sec of the beginning of this stub. */ | |
56 | bfd_vma stub_offset; | |
57 | ||
58 | /* Given the symbol's value and its section we can determine its final | |
59 | value when building the stubs (so the stub knows where to jump). */ | |
60 | bfd_vma target_value; | |
61 | ||
62 | /* This way we could mark stubs to be no longer necessary. */ | |
63 | bfd_boolean is_actually_needed; | |
64 | }; | |
65 | ||
66 | struct elf32_avr_link_hash_table | |
67 | { | |
68 | /* The main hash table. */ | |
69 | struct elf_link_hash_table etab; | |
70 | ||
71 | /* The stub hash table. */ | |
72 | struct bfd_hash_table bstab; | |
73 | ||
74 | bfd_boolean no_stubs; | |
75 | ||
76 | /* Linker stub bfd. */ | |
77 | bfd *stub_bfd; | |
78 | ||
79 | /* The stub section. */ | |
80 | asection *stub_sec; | |
81 | ||
82 | /* Usually 0, unless we are generating code for a bootloader. Will | |
83 | be initialized by elf32_avr_size_stubs to the vma offset of the | |
84 | output section associated with the stub section. */ | |
85 | bfd_vma vector_base; | |
86 | ||
87 | /* Assorted information used by elf32_avr_size_stubs. */ | |
88 | unsigned int bfd_count; | |
89 | int top_index; | |
90 | asection ** input_list; | |
91 | Elf_Internal_Sym ** all_local_syms; | |
92 | ||
93 | /* Tables for mapping vma beyond the 128k boundary to the address of the | |
94 | corresponding stub. (AMT) | |
95 | "amt_max_entry_cnt" reflects the number of entries that memory is allocated | |
96 | for in the "amt_stub_offsets" and "amt_destination_addr" arrays. | |
97 | "amt_entry_cnt" informs how many of these entries actually contain | |
98 | useful data. */ | |
99 | unsigned int amt_entry_cnt; | |
100 | unsigned int amt_max_entry_cnt; | |
101 | bfd_vma * amt_stub_offsets; | |
102 | bfd_vma * amt_destination_addr; | |
103 | }; | |
104 | ||
105 | /* Various hash macros and functions. */ | |
106 | #define avr_link_hash_table(p) \ | |
64ee10b6 | 107 | /* PR 3874: Check that we have an AVR style hash table before using it. */\ |
4dfe6ac6 NC |
108 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
109 | == AVR_ELF_DATA ? ((struct elf32_avr_link_hash_table *) ((p)->hash)) : NULL) | |
28c9d252 NC |
110 | |
111 | #define avr_stub_hash_entry(ent) \ | |
112 | ((struct elf32_avr_stub_hash_entry *)(ent)) | |
113 | ||
114 | #define avr_stub_hash_lookup(table, string, create, copy) \ | |
115 | ((struct elf32_avr_stub_hash_entry *) \ | |
116 | bfd_hash_lookup ((table), (string), (create), (copy))) | |
adde6300 | 117 | |
adde6300 AM |
118 | static reloc_howto_type elf_avr_howto_table[] = |
119 | { | |
120 | HOWTO (R_AVR_NONE, /* type */ | |
121 | 0, /* rightshift */ | |
122 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
123 | 32, /* bitsize */ | |
b34976b6 | 124 | FALSE, /* pc_relative */ |
adde6300 AM |
125 | 0, /* bitpos */ |
126 | complain_overflow_bitfield, /* complain_on_overflow */ | |
127 | bfd_elf_generic_reloc, /* special_function */ | |
128 | "R_AVR_NONE", /* name */ | |
b34976b6 | 129 | FALSE, /* partial_inplace */ |
adde6300 AM |
130 | 0, /* src_mask */ |
131 | 0, /* dst_mask */ | |
b34976b6 | 132 | FALSE), /* pcrel_offset */ |
adde6300 AM |
133 | |
134 | HOWTO (R_AVR_32, /* type */ | |
135 | 0, /* rightshift */ | |
136 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
137 | 32, /* bitsize */ | |
b34976b6 | 138 | FALSE, /* pc_relative */ |
adde6300 AM |
139 | 0, /* bitpos */ |
140 | complain_overflow_bitfield, /* complain_on_overflow */ | |
141 | bfd_elf_generic_reloc, /* special_function */ | |
142 | "R_AVR_32", /* name */ | |
b34976b6 | 143 | FALSE, /* partial_inplace */ |
adde6300 AM |
144 | 0xffffffff, /* src_mask */ |
145 | 0xffffffff, /* dst_mask */ | |
b34976b6 | 146 | FALSE), /* pcrel_offset */ |
adde6300 AM |
147 | |
148 | /* A 7 bit PC relative relocation. */ | |
149 | HOWTO (R_AVR_7_PCREL, /* type */ | |
150 | 1, /* rightshift */ | |
151 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
152 | 7, /* bitsize */ | |
b34976b6 | 153 | TRUE, /* pc_relative */ |
adde6300 AM |
154 | 3, /* bitpos */ |
155 | complain_overflow_bitfield, /* complain_on_overflow */ | |
156 | bfd_elf_generic_reloc, /* special_function */ | |
157 | "R_AVR_7_PCREL", /* name */ | |
b34976b6 | 158 | FALSE, /* partial_inplace */ |
adde6300 AM |
159 | 0xffff, /* src_mask */ |
160 | 0xffff, /* dst_mask */ | |
b34976b6 | 161 | TRUE), /* pcrel_offset */ |
adde6300 AM |
162 | |
163 | /* A 13 bit PC relative relocation. */ | |
164 | HOWTO (R_AVR_13_PCREL, /* type */ | |
165 | 1, /* rightshift */ | |
166 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
167 | 13, /* bitsize */ | |
b34976b6 | 168 | TRUE, /* pc_relative */ |
adde6300 AM |
169 | 0, /* bitpos */ |
170 | complain_overflow_bitfield, /* complain_on_overflow */ | |
171 | bfd_elf_generic_reloc, /* special_function */ | |
172 | "R_AVR_13_PCREL", /* name */ | |
b34976b6 | 173 | FALSE, /* partial_inplace */ |
adde6300 AM |
174 | 0xfff, /* src_mask */ |
175 | 0xfff, /* dst_mask */ | |
b34976b6 | 176 | TRUE), /* pcrel_offset */ |
adde6300 AM |
177 | |
178 | /* A 16 bit absolute relocation. */ | |
179 | HOWTO (R_AVR_16, /* type */ | |
180 | 0, /* rightshift */ | |
181 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
182 | 16, /* bitsize */ | |
b34976b6 | 183 | FALSE, /* pc_relative */ |
adde6300 AM |
184 | 0, /* bitpos */ |
185 | complain_overflow_dont, /* complain_on_overflow */ | |
186 | bfd_elf_generic_reloc, /* special_function */ | |
187 | "R_AVR_16", /* name */ | |
b34976b6 | 188 | FALSE, /* partial_inplace */ |
adde6300 AM |
189 | 0xffff, /* src_mask */ |
190 | 0xffff, /* dst_mask */ | |
b34976b6 | 191 | FALSE), /* pcrel_offset */ |
adde6300 | 192 | |
28c9d252 NC |
193 | /* A 16 bit absolute relocation for command address |
194 | Will be changed when linker stubs are needed. */ | |
adde6300 AM |
195 | HOWTO (R_AVR_16_PM, /* type */ |
196 | 1, /* rightshift */ | |
197 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
198 | 16, /* bitsize */ | |
b34976b6 | 199 | FALSE, /* pc_relative */ |
adde6300 AM |
200 | 0, /* bitpos */ |
201 | complain_overflow_bitfield, /* complain_on_overflow */ | |
202 | bfd_elf_generic_reloc, /* special_function */ | |
203 | "R_AVR_16_PM", /* name */ | |
b34976b6 | 204 | FALSE, /* partial_inplace */ |
adde6300 AM |
205 | 0xffff, /* src_mask */ |
206 | 0xffff, /* dst_mask */ | |
b34976b6 | 207 | FALSE), /* pcrel_offset */ |
adde6300 AM |
208 | /* A low 8 bit absolute relocation of 16 bit address. |
209 | For LDI command. */ | |
210 | HOWTO (R_AVR_LO8_LDI, /* type */ | |
211 | 0, /* rightshift */ | |
212 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
213 | 8, /* bitsize */ | |
b34976b6 | 214 | FALSE, /* pc_relative */ |
adde6300 AM |
215 | 0, /* bitpos */ |
216 | complain_overflow_dont, /* complain_on_overflow */ | |
217 | bfd_elf_generic_reloc, /* special_function */ | |
218 | "R_AVR_LO8_LDI", /* name */ | |
b34976b6 | 219 | FALSE, /* partial_inplace */ |
adde6300 AM |
220 | 0xffff, /* src_mask */ |
221 | 0xffff, /* dst_mask */ | |
b34976b6 | 222 | FALSE), /* pcrel_offset */ |
adde6300 AM |
223 | /* A high 8 bit absolute relocation of 16 bit address. |
224 | For LDI command. */ | |
225 | HOWTO (R_AVR_HI8_LDI, /* type */ | |
226 | 8, /* rightshift */ | |
227 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
228 | 8, /* bitsize */ | |
b34976b6 | 229 | FALSE, /* pc_relative */ |
adde6300 AM |
230 | 0, /* bitpos */ |
231 | complain_overflow_dont, /* complain_on_overflow */ | |
232 | bfd_elf_generic_reloc, /* special_function */ | |
233 | "R_AVR_HI8_LDI", /* name */ | |
b34976b6 | 234 | FALSE, /* partial_inplace */ |
adde6300 AM |
235 | 0xffff, /* src_mask */ |
236 | 0xffff, /* dst_mask */ | |
b34976b6 | 237 | FALSE), /* pcrel_offset */ |
adde6300 | 238 | /* A high 6 bit absolute relocation of 22 bit address. |
4cdc7696 | 239 | For LDI command. As well second most significant 8 bit value of |
df406460 | 240 | a 32 bit link-time constant. */ |
adde6300 AM |
241 | HOWTO (R_AVR_HH8_LDI, /* type */ |
242 | 16, /* rightshift */ | |
243 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
244 | 8, /* bitsize */ | |
b34976b6 | 245 | FALSE, /* pc_relative */ |
adde6300 AM |
246 | 0, /* bitpos */ |
247 | complain_overflow_dont, /* complain_on_overflow */ | |
248 | bfd_elf_generic_reloc, /* special_function */ | |
249 | "R_AVR_HH8_LDI", /* name */ | |
b34976b6 | 250 | FALSE, /* partial_inplace */ |
adde6300 AM |
251 | 0xffff, /* src_mask */ |
252 | 0xffff, /* dst_mask */ | |
b34976b6 | 253 | FALSE), /* pcrel_offset */ |
adde6300 AM |
254 | /* A negative low 8 bit absolute relocation of 16 bit address. |
255 | For LDI command. */ | |
256 | HOWTO (R_AVR_LO8_LDI_NEG, /* type */ | |
257 | 0, /* rightshift */ | |
258 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
259 | 8, /* bitsize */ | |
b34976b6 | 260 | FALSE, /* pc_relative */ |
adde6300 AM |
261 | 0, /* bitpos */ |
262 | complain_overflow_dont, /* complain_on_overflow */ | |
263 | bfd_elf_generic_reloc, /* special_function */ | |
264 | "R_AVR_LO8_LDI_NEG", /* name */ | |
b34976b6 | 265 | FALSE, /* partial_inplace */ |
adde6300 AM |
266 | 0xffff, /* src_mask */ |
267 | 0xffff, /* dst_mask */ | |
b34976b6 | 268 | FALSE), /* pcrel_offset */ |
df406460 | 269 | /* A negative high 8 bit absolute relocation of 16 bit address. |
adde6300 AM |
270 | For LDI command. */ |
271 | HOWTO (R_AVR_HI8_LDI_NEG, /* type */ | |
272 | 8, /* rightshift */ | |
273 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
274 | 8, /* bitsize */ | |
b34976b6 | 275 | FALSE, /* pc_relative */ |
adde6300 AM |
276 | 0, /* bitpos */ |
277 | complain_overflow_dont, /* complain_on_overflow */ | |
278 | bfd_elf_generic_reloc, /* special_function */ | |
279 | "R_AVR_HI8_LDI_NEG", /* name */ | |
b34976b6 | 280 | FALSE, /* partial_inplace */ |
adde6300 AM |
281 | 0xffff, /* src_mask */ |
282 | 0xffff, /* dst_mask */ | |
b34976b6 | 283 | FALSE), /* pcrel_offset */ |
df406460 | 284 | /* A negative high 6 bit absolute relocation of 22 bit address. |
adde6300 AM |
285 | For LDI command. */ |
286 | HOWTO (R_AVR_HH8_LDI_NEG, /* type */ | |
287 | 16, /* rightshift */ | |
288 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
289 | 8, /* bitsize */ | |
b34976b6 | 290 | FALSE, /* pc_relative */ |
adde6300 AM |
291 | 0, /* bitpos */ |
292 | complain_overflow_dont, /* complain_on_overflow */ | |
293 | bfd_elf_generic_reloc, /* special_function */ | |
294 | "R_AVR_HH8_LDI_NEG", /* name */ | |
b34976b6 | 295 | FALSE, /* partial_inplace */ |
adde6300 AM |
296 | 0xffff, /* src_mask */ |
297 | 0xffff, /* dst_mask */ | |
b34976b6 | 298 | FALSE), /* pcrel_offset */ |
adde6300 | 299 | /* A low 8 bit absolute relocation of 24 bit program memory address. |
28c9d252 | 300 | For LDI command. Will not be changed when linker stubs are needed. */ |
adde6300 AM |
301 | HOWTO (R_AVR_LO8_LDI_PM, /* type */ |
302 | 1, /* rightshift */ | |
303 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
304 | 8, /* bitsize */ | |
b34976b6 | 305 | FALSE, /* pc_relative */ |
adde6300 AM |
306 | 0, /* bitpos */ |
307 | complain_overflow_dont, /* complain_on_overflow */ | |
308 | bfd_elf_generic_reloc, /* special_function */ | |
309 | "R_AVR_LO8_LDI_PM", /* name */ | |
b34976b6 | 310 | FALSE, /* partial_inplace */ |
adde6300 AM |
311 | 0xffff, /* src_mask */ |
312 | 0xffff, /* dst_mask */ | |
b34976b6 | 313 | FALSE), /* pcrel_offset */ |
28c9d252 NC |
314 | /* A low 8 bit absolute relocation of 24 bit program memory address. |
315 | For LDI command. Will not be changed when linker stubs are needed. */ | |
adde6300 AM |
316 | HOWTO (R_AVR_HI8_LDI_PM, /* type */ |
317 | 9, /* rightshift */ | |
318 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
319 | 8, /* bitsize */ | |
b34976b6 | 320 | FALSE, /* pc_relative */ |
adde6300 AM |
321 | 0, /* bitpos */ |
322 | complain_overflow_dont, /* complain_on_overflow */ | |
323 | bfd_elf_generic_reloc, /* special_function */ | |
324 | "R_AVR_HI8_LDI_PM", /* name */ | |
b34976b6 | 325 | FALSE, /* partial_inplace */ |
adde6300 AM |
326 | 0xffff, /* src_mask */ |
327 | 0xffff, /* dst_mask */ | |
b34976b6 | 328 | FALSE), /* pcrel_offset */ |
28c9d252 NC |
329 | /* A low 8 bit absolute relocation of 24 bit program memory address. |
330 | For LDI command. Will not be changed when linker stubs are needed. */ | |
adde6300 AM |
331 | HOWTO (R_AVR_HH8_LDI_PM, /* type */ |
332 | 17, /* rightshift */ | |
333 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
334 | 8, /* bitsize */ | |
b34976b6 | 335 | FALSE, /* pc_relative */ |
adde6300 AM |
336 | 0, /* bitpos */ |
337 | complain_overflow_dont, /* complain_on_overflow */ | |
338 | bfd_elf_generic_reloc, /* special_function */ | |
339 | "R_AVR_HH8_LDI_PM", /* name */ | |
b34976b6 | 340 | FALSE, /* partial_inplace */ |
adde6300 AM |
341 | 0xffff, /* src_mask */ |
342 | 0xffff, /* dst_mask */ | |
b34976b6 | 343 | FALSE), /* pcrel_offset */ |
28c9d252 NC |
344 | /* A low 8 bit absolute relocation of 24 bit program memory address. |
345 | For LDI command. Will not be changed when linker stubs are needed. */ | |
adde6300 AM |
346 | HOWTO (R_AVR_LO8_LDI_PM_NEG, /* type */ |
347 | 1, /* rightshift */ | |
348 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
349 | 8, /* bitsize */ | |
b34976b6 | 350 | FALSE, /* pc_relative */ |
adde6300 AM |
351 | 0, /* bitpos */ |
352 | complain_overflow_dont, /* complain_on_overflow */ | |
353 | bfd_elf_generic_reloc, /* special_function */ | |
354 | "R_AVR_LO8_LDI_PM_NEG", /* name */ | |
b34976b6 | 355 | FALSE, /* partial_inplace */ |
adde6300 AM |
356 | 0xffff, /* src_mask */ |
357 | 0xffff, /* dst_mask */ | |
b34976b6 | 358 | FALSE), /* pcrel_offset */ |
28c9d252 NC |
359 | /* A low 8 bit absolute relocation of 24 bit program memory address. |
360 | For LDI command. Will not be changed when linker stubs are needed. */ | |
adde6300 AM |
361 | HOWTO (R_AVR_HI8_LDI_PM_NEG, /* type */ |
362 | 9, /* rightshift */ | |
363 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
364 | 8, /* bitsize */ | |
b34976b6 | 365 | FALSE, /* pc_relative */ |
adde6300 AM |
366 | 0, /* bitpos */ |
367 | complain_overflow_dont, /* complain_on_overflow */ | |
368 | bfd_elf_generic_reloc, /* special_function */ | |
369 | "R_AVR_HI8_LDI_PM_NEG", /* name */ | |
b34976b6 | 370 | FALSE, /* partial_inplace */ |
adde6300 AM |
371 | 0xffff, /* src_mask */ |
372 | 0xffff, /* dst_mask */ | |
b34976b6 | 373 | FALSE), /* pcrel_offset */ |
28c9d252 NC |
374 | /* A low 8 bit absolute relocation of 24 bit program memory address. |
375 | For LDI command. Will not be changed when linker stubs are needed. */ | |
adde6300 AM |
376 | HOWTO (R_AVR_HH8_LDI_PM_NEG, /* type */ |
377 | 17, /* rightshift */ | |
378 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
379 | 8, /* bitsize */ | |
b34976b6 | 380 | FALSE, /* pc_relative */ |
adde6300 AM |
381 | 0, /* bitpos */ |
382 | complain_overflow_dont, /* complain_on_overflow */ | |
383 | bfd_elf_generic_reloc, /* special_function */ | |
384 | "R_AVR_HH8_LDI_PM_NEG", /* name */ | |
b34976b6 | 385 | FALSE, /* partial_inplace */ |
adde6300 AM |
386 | 0xffff, /* src_mask */ |
387 | 0xffff, /* dst_mask */ | |
b34976b6 | 388 | FALSE), /* pcrel_offset */ |
adde6300 AM |
389 | /* Relocation for CALL command in ATmega. */ |
390 | HOWTO (R_AVR_CALL, /* type */ | |
391 | 1, /* rightshift */ | |
392 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
393 | 23, /* bitsize */ | |
b34976b6 | 394 | FALSE, /* pc_relative */ |
adde6300 | 395 | 0, /* bitpos */ |
750bce0e | 396 | complain_overflow_dont,/* complain_on_overflow */ |
adde6300 AM |
397 | bfd_elf_generic_reloc, /* special_function */ |
398 | "R_AVR_CALL", /* name */ | |
b34976b6 | 399 | FALSE, /* partial_inplace */ |
adde6300 AM |
400 | 0xffffffff, /* src_mask */ |
401 | 0xffffffff, /* dst_mask */ | |
750bce0e NC |
402 | FALSE), /* pcrel_offset */ |
403 | /* A 16 bit absolute relocation of 16 bit address. | |
404 | For LDI command. */ | |
405 | HOWTO (R_AVR_LDI, /* type */ | |
406 | 0, /* rightshift */ | |
407 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
408 | 16, /* bitsize */ | |
409 | FALSE, /* pc_relative */ | |
410 | 0, /* bitpos */ | |
411 | complain_overflow_dont,/* complain_on_overflow */ | |
412 | bfd_elf_generic_reloc, /* special_function */ | |
413 | "R_AVR_LDI", /* name */ | |
414 | FALSE, /* partial_inplace */ | |
415 | 0xffff, /* src_mask */ | |
416 | 0xffff, /* dst_mask */ | |
417 | FALSE), /* pcrel_offset */ | |
418 | /* A 6 bit absolute relocation of 6 bit offset. | |
419 | For ldd/sdd command. */ | |
420 | HOWTO (R_AVR_6, /* type */ | |
421 | 0, /* rightshift */ | |
422 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
423 | 6, /* bitsize */ | |
424 | FALSE, /* pc_relative */ | |
425 | 0, /* bitpos */ | |
426 | complain_overflow_dont,/* complain_on_overflow */ | |
427 | bfd_elf_generic_reloc, /* special_function */ | |
428 | "R_AVR_6", /* name */ | |
429 | FALSE, /* partial_inplace */ | |
430 | 0xffff, /* src_mask */ | |
431 | 0xffff, /* dst_mask */ | |
432 | FALSE), /* pcrel_offset */ | |
433 | /* A 6 bit absolute relocation of 6 bit offset. | |
434 | For sbiw/adiw command. */ | |
435 | HOWTO (R_AVR_6_ADIW, /* type */ | |
436 | 0, /* rightshift */ | |
437 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
438 | 6, /* bitsize */ | |
439 | FALSE, /* pc_relative */ | |
440 | 0, /* bitpos */ | |
441 | complain_overflow_dont,/* complain_on_overflow */ | |
442 | bfd_elf_generic_reloc, /* special_function */ | |
443 | "R_AVR_6_ADIW", /* name */ | |
444 | FALSE, /* partial_inplace */ | |
445 | 0xffff, /* src_mask */ | |
446 | 0xffff, /* dst_mask */ | |
df406460 NC |
447 | FALSE), /* pcrel_offset */ |
448 | /* Most significant 8 bit value of a 32 bit link-time constant. */ | |
449 | HOWTO (R_AVR_MS8_LDI, /* type */ | |
450 | 24, /* rightshift */ | |
451 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
452 | 8, /* bitsize */ | |
453 | FALSE, /* pc_relative */ | |
454 | 0, /* bitpos */ | |
455 | complain_overflow_dont, /* complain_on_overflow */ | |
456 | bfd_elf_generic_reloc, /* special_function */ | |
457 | "R_AVR_MS8_LDI", /* name */ | |
458 | FALSE, /* partial_inplace */ | |
459 | 0xffff, /* src_mask */ | |
460 | 0xffff, /* dst_mask */ | |
461 | FALSE), /* pcrel_offset */ | |
462 | /* Negative most significant 8 bit value of a 32 bit link-time constant. */ | |
463 | HOWTO (R_AVR_MS8_LDI_NEG, /* type */ | |
464 | 24, /* rightshift */ | |
465 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
466 | 8, /* bitsize */ | |
467 | FALSE, /* pc_relative */ | |
468 | 0, /* bitpos */ | |
469 | complain_overflow_dont, /* complain_on_overflow */ | |
470 | bfd_elf_generic_reloc, /* special_function */ | |
471 | "R_AVR_MS8_LDI_NEG", /* name */ | |
472 | FALSE, /* partial_inplace */ | |
473 | 0xffff, /* src_mask */ | |
474 | 0xffff, /* dst_mask */ | |
28c9d252 NC |
475 | FALSE), /* pcrel_offset */ |
476 | /* A low 8 bit absolute relocation of 24 bit program memory address. | |
17e57237 | 477 | For LDI command. Will be changed when linker stubs are needed. */ |
28c9d252 NC |
478 | HOWTO (R_AVR_LO8_LDI_GS, /* type */ |
479 | 1, /* rightshift */ | |
480 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
481 | 8, /* bitsize */ | |
482 | FALSE, /* pc_relative */ | |
483 | 0, /* bitpos */ | |
484 | complain_overflow_dont, /* complain_on_overflow */ | |
485 | bfd_elf_generic_reloc, /* special_function */ | |
486 | "R_AVR_LO8_LDI_GS", /* name */ | |
487 | FALSE, /* partial_inplace */ | |
488 | 0xffff, /* src_mask */ | |
489 | 0xffff, /* dst_mask */ | |
490 | FALSE), /* pcrel_offset */ | |
491 | /* A low 8 bit absolute relocation of 24 bit program memory address. | |
17e57237 | 492 | For LDI command. Will be changed when linker stubs are needed. */ |
28c9d252 NC |
493 | HOWTO (R_AVR_HI8_LDI_GS, /* type */ |
494 | 9, /* rightshift */ | |
495 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
496 | 8, /* bitsize */ | |
497 | FALSE, /* pc_relative */ | |
498 | 0, /* bitpos */ | |
499 | complain_overflow_dont, /* complain_on_overflow */ | |
500 | bfd_elf_generic_reloc, /* special_function */ | |
501 | "R_AVR_HI8_LDI_GS", /* name */ | |
502 | FALSE, /* partial_inplace */ | |
503 | 0xffff, /* src_mask */ | |
504 | 0xffff, /* dst_mask */ | |
17e57237 NC |
505 | FALSE), /* pcrel_offset */ |
506 | /* 8 bit offset. */ | |
507 | HOWTO (R_AVR_8, /* type */ | |
508 | 0, /* rightshift */ | |
509 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
510 | 8, /* bitsize */ | |
511 | FALSE, /* pc_relative */ | |
512 | 0, /* bitpos */ | |
513 | complain_overflow_bitfield,/* complain_on_overflow */ | |
514 | bfd_elf_generic_reloc, /* special_function */ | |
515 | "R_AVR_8", /* name */ | |
516 | FALSE, /* partial_inplace */ | |
517 | 0x000000ff, /* src_mask */ | |
518 | 0x000000ff, /* dst_mask */ | |
519 | FALSE), /* pcrel_offset */ | |
99700d6f NC |
520 | /* lo8-part to use in .byte lo8(sym). */ |
521 | HOWTO (R_AVR_8_LO8, /* type */ | |
522 | 0, /* rightshift */ | |
523 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
524 | 8, /* bitsize */ | |
525 | FALSE, /* pc_relative */ | |
526 | 0, /* bitpos */ | |
527 | complain_overflow_dont,/* complain_on_overflow */ | |
528 | bfd_elf_generic_reloc, /* special_function */ | |
529 | "R_AVR_8_LO8", /* name */ | |
530 | FALSE, /* partial_inplace */ | |
531 | 0xffffff, /* src_mask */ | |
532 | 0xffffff, /* dst_mask */ | |
533 | FALSE), /* pcrel_offset */ | |
534 | /* hi8-part to use in .byte hi8(sym). */ | |
535 | HOWTO (R_AVR_8_HI8, /* type */ | |
536 | 8, /* rightshift */ | |
537 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
538 | 8, /* bitsize */ | |
539 | FALSE, /* pc_relative */ | |
540 | 0, /* bitpos */ | |
541 | complain_overflow_dont,/* complain_on_overflow */ | |
542 | bfd_elf_generic_reloc, /* special_function */ | |
543 | "R_AVR_8_HI8", /* name */ | |
544 | FALSE, /* partial_inplace */ | |
545 | 0xffffff, /* src_mask */ | |
546 | 0xffffff, /* dst_mask */ | |
547 | FALSE), /* pcrel_offset */ | |
548 | /* hhi8-part to use in .byte hhi8(sym). */ | |
549 | HOWTO (R_AVR_8_HHI8, /* type */ | |
550 | 16, /* rightshift */ | |
551 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
552 | 8, /* bitsize */ | |
553 | FALSE, /* pc_relative */ | |
554 | 0, /* bitpos */ | |
555 | complain_overflow_dont,/* complain_on_overflow */ | |
556 | bfd_elf_generic_reloc, /* special_function */ | |
557 | "R_AVR_8_HHI8", /* name */ | |
558 | FALSE, /* partial_inplace */ | |
559 | 0xffffff, /* src_mask */ | |
560 | 0xffffff, /* dst_mask */ | |
561 | FALSE), /* pcrel_offset */ | |
adde6300 AM |
562 | }; |
563 | ||
564 | /* Map BFD reloc types to AVR ELF reloc types. */ | |
565 | ||
566 | struct avr_reloc_map | |
567 | { | |
568 | bfd_reloc_code_real_type bfd_reloc_val; | |
569 | unsigned int elf_reloc_val; | |
570 | }; | |
571 | ||
28c9d252 | 572 | static const struct avr_reloc_map avr_reloc_map[] = |
adde6300 AM |
573 | { |
574 | { BFD_RELOC_NONE, R_AVR_NONE }, | |
575 | { BFD_RELOC_32, R_AVR_32 }, | |
576 | { BFD_RELOC_AVR_7_PCREL, R_AVR_7_PCREL }, | |
577 | { BFD_RELOC_AVR_13_PCREL, R_AVR_13_PCREL }, | |
578 | { BFD_RELOC_16, R_AVR_16 }, | |
579 | { BFD_RELOC_AVR_16_PM, R_AVR_16_PM }, | |
580 | { BFD_RELOC_AVR_LO8_LDI, R_AVR_LO8_LDI}, | |
581 | { BFD_RELOC_AVR_HI8_LDI, R_AVR_HI8_LDI }, | |
582 | { BFD_RELOC_AVR_HH8_LDI, R_AVR_HH8_LDI }, | |
df406460 | 583 | { BFD_RELOC_AVR_MS8_LDI, R_AVR_MS8_LDI }, |
adde6300 AM |
584 | { BFD_RELOC_AVR_LO8_LDI_NEG, R_AVR_LO8_LDI_NEG }, |
585 | { BFD_RELOC_AVR_HI8_LDI_NEG, R_AVR_HI8_LDI_NEG }, | |
586 | { BFD_RELOC_AVR_HH8_LDI_NEG, R_AVR_HH8_LDI_NEG }, | |
df406460 | 587 | { BFD_RELOC_AVR_MS8_LDI_NEG, R_AVR_MS8_LDI_NEG }, |
adde6300 | 588 | { BFD_RELOC_AVR_LO8_LDI_PM, R_AVR_LO8_LDI_PM }, |
28c9d252 | 589 | { BFD_RELOC_AVR_LO8_LDI_GS, R_AVR_LO8_LDI_GS }, |
adde6300 | 590 | { BFD_RELOC_AVR_HI8_LDI_PM, R_AVR_HI8_LDI_PM }, |
28c9d252 | 591 | { BFD_RELOC_AVR_HI8_LDI_GS, R_AVR_HI8_LDI_GS }, |
adde6300 AM |
592 | { BFD_RELOC_AVR_HH8_LDI_PM, R_AVR_HH8_LDI_PM }, |
593 | { BFD_RELOC_AVR_LO8_LDI_PM_NEG, R_AVR_LO8_LDI_PM_NEG }, | |
594 | { BFD_RELOC_AVR_HI8_LDI_PM_NEG, R_AVR_HI8_LDI_PM_NEG }, | |
595 | { BFD_RELOC_AVR_HH8_LDI_PM_NEG, R_AVR_HH8_LDI_PM_NEG }, | |
750bce0e NC |
596 | { BFD_RELOC_AVR_CALL, R_AVR_CALL }, |
597 | { BFD_RELOC_AVR_LDI, R_AVR_LDI }, | |
598 | { BFD_RELOC_AVR_6, R_AVR_6 }, | |
17e57237 | 599 | { BFD_RELOC_AVR_6_ADIW, R_AVR_6_ADIW }, |
99700d6f NC |
600 | { BFD_RELOC_8, R_AVR_8 }, |
601 | { BFD_RELOC_AVR_8_LO, R_AVR_8_LO8 }, | |
602 | { BFD_RELOC_AVR_8_HI, R_AVR_8_HI8 }, | |
603 | { BFD_RELOC_AVR_8_HHI, R_AVR_8_HHI8 } | |
adde6300 AM |
604 | }; |
605 | ||
df406460 | 606 | /* Meant to be filled one day with the wrap around address for the |
4cdc7696 | 607 | specific device. I.e. should get the value 0x4000 for 16k devices, |
df406460 | 608 | 0x8000 for 32k devices and so on. |
4cdc7696 | 609 | |
df406460 | 610 | We initialize it here with a value of 0x1000000 resulting in |
4cdc7696 NC |
611 | that we will never suggest a wrap-around jump during relaxation. |
612 | The logic of the source code later on assumes that in | |
df406460 | 613 | avr_pc_wrap_around one single bit is set. */ |
28c9d252 NC |
614 | static bfd_vma avr_pc_wrap_around = 0x10000000; |
615 | ||
616 | /* If this variable holds a value different from zero, the linker relaxation | |
617 | machine will try to optimize call/ret sequences by a single jump | |
618 | instruction. This option could be switched off by a linker switch. */ | |
619 | static int avr_replace_call_ret_sequences = 1; | |
620 | \f | |
621 | /* Initialize an entry in the stub hash table. */ | |
622 | ||
623 | static struct bfd_hash_entry * | |
624 | stub_hash_newfunc (struct bfd_hash_entry *entry, | |
625 | struct bfd_hash_table *table, | |
626 | const char *string) | |
627 | { | |
628 | /* Allocate the structure if it has not already been allocated by a | |
629 | subclass. */ | |
630 | if (entry == NULL) | |
631 | { | |
632 | entry = bfd_hash_allocate (table, | |
633 | sizeof (struct elf32_avr_stub_hash_entry)); | |
634 | if (entry == NULL) | |
635 | return entry; | |
636 | } | |
637 | ||
638 | /* Call the allocation method of the superclass. */ | |
639 | entry = bfd_hash_newfunc (entry, table, string); | |
640 | if (entry != NULL) | |
641 | { | |
642 | struct elf32_avr_stub_hash_entry *hsh; | |
643 | ||
644 | /* Initialize the local fields. */ | |
645 | hsh = avr_stub_hash_entry (entry); | |
646 | hsh->stub_offset = 0; | |
647 | hsh->target_value = 0; | |
648 | } | |
649 | ||
650 | return entry; | |
651 | } | |
652 | ||
64ee10b6 NC |
653 | /* This function is just a straight passthrough to the real |
654 | function in linker.c. Its prupose is so that its address | |
655 | can be compared inside the avr_link_hash_table macro. */ | |
656 | ||
657 | static struct bfd_hash_entry * | |
658 | elf32_avr_link_hash_newfunc (struct bfd_hash_entry * entry, | |
659 | struct bfd_hash_table * table, | |
660 | const char * string) | |
661 | { | |
662 | return _bfd_elf_link_hash_newfunc (entry, table, string); | |
663 | } | |
664 | ||
28c9d252 NC |
665 | /* Create the derived linker hash table. The AVR ELF port uses the derived |
666 | hash table to keep information specific to the AVR ELF linker (without | |
667 | using static variables). */ | |
668 | ||
669 | static struct bfd_link_hash_table * | |
670 | elf32_avr_link_hash_table_create (bfd *abfd) | |
671 | { | |
672 | struct elf32_avr_link_hash_table *htab; | |
673 | bfd_size_type amt = sizeof (*htab); | |
674 | ||
675 | htab = bfd_malloc (amt); | |
676 | if (htab == NULL) | |
677 | return NULL; | |
678 | ||
679 | if (!_bfd_elf_link_hash_table_init (&htab->etab, abfd, | |
64ee10b6 | 680 | elf32_avr_link_hash_newfunc, |
4dfe6ac6 NC |
681 | sizeof (struct elf_link_hash_entry), |
682 | AVR_ELF_DATA)) | |
28c9d252 NC |
683 | { |
684 | free (htab); | |
685 | return NULL; | |
686 | } | |
687 | ||
688 | /* Init the stub hash table too. */ | |
689 | if (!bfd_hash_table_init (&htab->bstab, stub_hash_newfunc, | |
690 | sizeof (struct elf32_avr_stub_hash_entry))) | |
691 | return NULL; | |
4cdc7696 | 692 | |
28c9d252 NC |
693 | htab->stub_bfd = NULL; |
694 | htab->stub_sec = NULL; | |
695 | ||
696 | /* Initialize the address mapping table. */ | |
697 | htab->amt_stub_offsets = NULL; | |
698 | htab->amt_destination_addr = NULL; | |
699 | htab->amt_entry_cnt = 0; | |
700 | htab->amt_max_entry_cnt = 0; | |
701 | ||
702 | return &htab->etab.root; | |
703 | } | |
704 | ||
705 | /* Free the derived linker hash table. */ | |
706 | ||
707 | static void | |
708 | elf32_avr_link_hash_table_free (struct bfd_link_hash_table *btab) | |
709 | { | |
710 | struct elf32_avr_link_hash_table *htab | |
711 | = (struct elf32_avr_link_hash_table *) btab; | |
712 | ||
713 | /* Free the address mapping table. */ | |
714 | if (htab->amt_stub_offsets != NULL) | |
715 | free (htab->amt_stub_offsets); | |
716 | if (htab->amt_destination_addr != NULL) | |
717 | free (htab->amt_destination_addr); | |
718 | ||
719 | bfd_hash_table_free (&htab->bstab); | |
720 | _bfd_generic_link_hash_table_free (btab); | |
721 | } | |
df406460 NC |
722 | |
723 | /* Calculates the effective distance of a pc relative jump/call. */ | |
73160847 | 724 | |
df406460 NC |
725 | static int |
726 | avr_relative_distance_considering_wrap_around (unsigned int distance) | |
4cdc7696 | 727 | { |
df406460 | 728 | unsigned int wrap_around_mask = avr_pc_wrap_around - 1; |
df406460 NC |
729 | int dist_with_wrap_around = distance & wrap_around_mask; |
730 | ||
4cdc7696 | 731 | if (dist_with_wrap_around > ((int) (avr_pc_wrap_around >> 1))) |
df406460 NC |
732 | dist_with_wrap_around -= avr_pc_wrap_around; |
733 | ||
734 | return dist_with_wrap_around; | |
735 | } | |
736 | ||
737 | ||
adde6300 | 738 | static reloc_howto_type * |
4cdc7696 NC |
739 | bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
740 | bfd_reloc_code_real_type code) | |
adde6300 AM |
741 | { |
742 | unsigned int i; | |
743 | ||
744 | for (i = 0; | |
745 | i < sizeof (avr_reloc_map) / sizeof (struct avr_reloc_map); | |
746 | i++) | |
73160847 NC |
747 | if (avr_reloc_map[i].bfd_reloc_val == code) |
748 | return &elf_avr_howto_table[avr_reloc_map[i].elf_reloc_val]; | |
adde6300 AM |
749 | |
750 | return NULL; | |
751 | } | |
752 | ||
157090f7 AM |
753 | static reloc_howto_type * |
754 | bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
755 | const char *r_name) | |
756 | { | |
757 | unsigned int i; | |
758 | ||
759 | for (i = 0; | |
760 | i < sizeof (elf_avr_howto_table) / sizeof (elf_avr_howto_table[0]); | |
761 | i++) | |
762 | if (elf_avr_howto_table[i].name != NULL | |
763 | && strcasecmp (elf_avr_howto_table[i].name, r_name) == 0) | |
764 | return &elf_avr_howto_table[i]; | |
765 | ||
766 | return NULL; | |
767 | } | |
768 | ||
adde6300 AM |
769 | /* Set the howto pointer for an AVR ELF reloc. */ |
770 | ||
771 | static void | |
4cdc7696 NC |
772 | avr_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED, |
773 | arelent *cache_ptr, | |
774 | Elf_Internal_Rela *dst) | |
adde6300 AM |
775 | { |
776 | unsigned int r_type; | |
777 | ||
778 | r_type = ELF32_R_TYPE (dst->r_info); | |
779 | BFD_ASSERT (r_type < (unsigned int) R_AVR_max); | |
780 | cache_ptr->howto = &elf_avr_howto_table[r_type]; | |
781 | } | |
782 | ||
28c9d252 NC |
783 | static bfd_boolean |
784 | avr_stub_is_required_for_16_bit_reloc (bfd_vma relocation) | |
785 | { | |
786 | return (relocation >= 0x020000); | |
787 | } | |
788 | ||
789 | /* Returns the address of the corresponding stub if there is one. | |
790 | Returns otherwise an address above 0x020000. This function | |
791 | could also be used, if there is no knowledge on the section where | |
792 | the destination is found. */ | |
793 | ||
794 | static bfd_vma | |
795 | avr_get_stub_addr (bfd_vma srel, | |
796 | struct elf32_avr_link_hash_table *htab) | |
797 | { | |
91d6fa6a | 798 | unsigned int sindex; |
28c9d252 NC |
799 | bfd_vma stub_sec_addr = |
800 | (htab->stub_sec->output_section->vma + | |
801 | htab->stub_sec->output_offset); | |
802 | ||
91d6fa6a NC |
803 | for (sindex = 0; sindex < htab->amt_max_entry_cnt; sindex ++) |
804 | if (htab->amt_destination_addr[sindex] == srel) | |
805 | return htab->amt_stub_offsets[sindex] + stub_sec_addr; | |
28c9d252 NC |
806 | |
807 | /* Return an address that could not be reached by 16 bit relocs. */ | |
808 | return 0x020000; | |
809 | } | |
810 | ||
adde6300 AM |
811 | /* Perform a single relocation. By default we use the standard BFD |
812 | routines, but a few relocs, we have to do them ourselves. */ | |
813 | ||
814 | static bfd_reloc_status_type | |
28c9d252 NC |
815 | avr_final_link_relocate (reloc_howto_type * howto, |
816 | bfd * input_bfd, | |
817 | asection * input_section, | |
818 | bfd_byte * contents, | |
819 | Elf_Internal_Rela * rel, | |
820 | bfd_vma relocation, | |
821 | struct elf32_avr_link_hash_table * htab) | |
adde6300 AM |
822 | { |
823 | bfd_reloc_status_type r = bfd_reloc_ok; | |
824 | bfd_vma x; | |
825 | bfd_signed_vma srel; | |
28c9d252 NC |
826 | bfd_signed_vma reloc_addr; |
827 | bfd_boolean use_stubs = FALSE; | |
828 | /* Usually is 0, unless we are generating code for a bootloader. */ | |
829 | bfd_signed_vma base_addr = htab->vector_base; | |
830 | ||
831 | /* Absolute addr of the reloc in the final excecutable. */ | |
832 | reloc_addr = rel->r_offset + input_section->output_section->vma | |
833 | + input_section->output_offset; | |
adde6300 AM |
834 | |
835 | switch (howto->type) | |
836 | { | |
837 | case R_AVR_7_PCREL: | |
838 | contents += rel->r_offset; | |
839 | srel = (bfd_signed_vma) relocation; | |
840 | srel += rel->r_addend; | |
841 | srel -= rel->r_offset; | |
a7c10850 | 842 | srel -= 2; /* Branch instructions add 2 to the PC... */ |
adde6300 AM |
843 | srel -= (input_section->output_section->vma + |
844 | input_section->output_offset); | |
845 | ||
846 | if (srel & 1) | |
847 | return bfd_reloc_outofrange; | |
848 | if (srel > ((1 << 7) - 1) || (srel < - (1 << 7))) | |
849 | return bfd_reloc_overflow; | |
850 | x = bfd_get_16 (input_bfd, contents); | |
851 | x = (x & 0xfc07) | (((srel >> 1) << 3) & 0x3f8); | |
852 | bfd_put_16 (input_bfd, x, contents); | |
853 | break; | |
854 | ||
855 | case R_AVR_13_PCREL: | |
856 | contents += rel->r_offset; | |
857 | srel = (bfd_signed_vma) relocation; | |
858 | srel += rel->r_addend; | |
859 | srel -= rel->r_offset; | |
a7c10850 | 860 | srel -= 2; /* Branch instructions add 2 to the PC... */ |
adde6300 AM |
861 | srel -= (input_section->output_section->vma + |
862 | input_section->output_offset); | |
863 | ||
864 | if (srel & 1) | |
865 | return bfd_reloc_outofrange; | |
866 | ||
df406460 NC |
867 | srel = avr_relative_distance_considering_wrap_around (srel); |
868 | ||
adde6300 AM |
869 | /* AVR addresses commands as words. */ |
870 | srel >>= 1; | |
871 | ||
872 | /* Check for overflow. */ | |
873 | if (srel < -2048 || srel > 2047) | |
874 | { | |
df406460 NC |
875 | /* Relative distance is too large. */ |
876 | ||
654c3c9f | 877 | /* Always apply WRAPAROUND for avr2, avr25, and avr4. */ |
65aa24b6 | 878 | switch (bfd_get_mach (input_bfd)) |
adde6300 | 879 | { |
65aa24b6 | 880 | case bfd_mach_avr2: |
654c3c9f | 881 | case bfd_mach_avr25: |
65aa24b6 NC |
882 | case bfd_mach_avr4: |
883 | break; | |
884 | ||
885 | default: | |
886 | return bfd_reloc_overflow; | |
adde6300 | 887 | } |
adde6300 AM |
888 | } |
889 | ||
890 | x = bfd_get_16 (input_bfd, contents); | |
891 | x = (x & 0xf000) | (srel & 0xfff); | |
892 | bfd_put_16 (input_bfd, x, contents); | |
893 | break; | |
894 | ||
895 | case R_AVR_LO8_LDI: | |
896 | contents += rel->r_offset; | |
897 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
898 | x = bfd_get_16 (input_bfd, contents); | |
899 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
900 | bfd_put_16 (input_bfd, x, contents); | |
901 | break; | |
902 | ||
750bce0e NC |
903 | case R_AVR_LDI: |
904 | contents += rel->r_offset; | |
905 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
4cdc7696 NC |
906 | if (((srel > 0) && (srel & 0xffff) > 255) |
907 | || ((srel < 0) && ((-srel) & 0xffff) > 128)) | |
df406460 NC |
908 | /* Remove offset for data/eeprom section. */ |
909 | return bfd_reloc_overflow; | |
910 | ||
750bce0e NC |
911 | x = bfd_get_16 (input_bfd, contents); |
912 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
913 | bfd_put_16 (input_bfd, x, contents); | |
914 | break; | |
915 | ||
916 | case R_AVR_6: | |
917 | contents += rel->r_offset; | |
918 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
919 | if (((srel & 0xffff) > 63) || (srel < 0)) | |
920 | /* Remove offset for data/eeprom section. */ | |
921 | return bfd_reloc_overflow; | |
922 | x = bfd_get_16 (input_bfd, contents); | |
4cdc7696 | 923 | x = (x & 0xd3f8) | ((srel & 7) | ((srel & (3 << 3)) << 7) |
df406460 | 924 | | ((srel & (1 << 5)) << 8)); |
750bce0e NC |
925 | bfd_put_16 (input_bfd, x, contents); |
926 | break; | |
927 | ||
928 | case R_AVR_6_ADIW: | |
929 | contents += rel->r_offset; | |
930 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
931 | if (((srel & 0xffff) > 63) || (srel < 0)) | |
932 | /* Remove offset for data/eeprom section. */ | |
933 | return bfd_reloc_overflow; | |
934 | x = bfd_get_16 (input_bfd, contents); | |
4cdc7696 | 935 | x = (x & 0xff30) | (srel & 0xf) | ((srel & 0x30) << 2); |
750bce0e NC |
936 | bfd_put_16 (input_bfd, x, contents); |
937 | break; | |
938 | ||
adde6300 AM |
939 | case R_AVR_HI8_LDI: |
940 | contents += rel->r_offset; | |
941 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
942 | srel = (srel >> 8) & 0xff; | |
943 | x = bfd_get_16 (input_bfd, contents); | |
944 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
945 | bfd_put_16 (input_bfd, x, contents); | |
946 | break; | |
947 | ||
948 | case R_AVR_HH8_LDI: | |
949 | contents += rel->r_offset; | |
950 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
951 | srel = (srel >> 16) & 0xff; | |
952 | x = bfd_get_16 (input_bfd, contents); | |
953 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
954 | bfd_put_16 (input_bfd, x, contents); | |
955 | break; | |
956 | ||
df406460 NC |
957 | case R_AVR_MS8_LDI: |
958 | contents += rel->r_offset; | |
959 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
960 | srel = (srel >> 24) & 0xff; | |
961 | x = bfd_get_16 (input_bfd, contents); | |
962 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
963 | bfd_put_16 (input_bfd, x, contents); | |
964 | break; | |
965 | ||
adde6300 AM |
966 | case R_AVR_LO8_LDI_NEG: |
967 | contents += rel->r_offset; | |
968 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
969 | srel = -srel; | |
970 | x = bfd_get_16 (input_bfd, contents); | |
971 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
972 | bfd_put_16 (input_bfd, x, contents); | |
973 | break; | |
974 | ||
975 | case R_AVR_HI8_LDI_NEG: | |
976 | contents += rel->r_offset; | |
977 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
978 | srel = -srel; | |
979 | srel = (srel >> 8) & 0xff; | |
980 | x = bfd_get_16 (input_bfd, contents); | |
981 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
982 | bfd_put_16 (input_bfd, x, contents); | |
983 | break; | |
984 | ||
985 | case R_AVR_HH8_LDI_NEG: | |
986 | contents += rel->r_offset; | |
987 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
988 | srel = -srel; | |
989 | srel = (srel >> 16) & 0xff; | |
990 | x = bfd_get_16 (input_bfd, contents); | |
991 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
992 | bfd_put_16 (input_bfd, x, contents); | |
993 | break; | |
994 | ||
df406460 NC |
995 | case R_AVR_MS8_LDI_NEG: |
996 | contents += rel->r_offset; | |
997 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
998 | srel = -srel; | |
999 | srel = (srel >> 24) & 0xff; | |
1000 | x = bfd_get_16 (input_bfd, contents); | |
1001 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
1002 | bfd_put_16 (input_bfd, x, contents); | |
1003 | break; | |
1004 | ||
28c9d252 NC |
1005 | case R_AVR_LO8_LDI_GS: |
1006 | use_stubs = (!htab->no_stubs); | |
1007 | /* Fall through. */ | |
adde6300 AM |
1008 | case R_AVR_LO8_LDI_PM: |
1009 | contents += rel->r_offset; | |
1010 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
28c9d252 NC |
1011 | |
1012 | if (use_stubs | |
1013 | && avr_stub_is_required_for_16_bit_reloc (srel - base_addr)) | |
1014 | { | |
1015 | bfd_vma old_srel = srel; | |
1016 | ||
1017 | /* We need to use the address of the stub instead. */ | |
1018 | srel = avr_get_stub_addr (srel, htab); | |
1019 | if (debug_stubs) | |
1020 | printf ("LD: Using jump stub (at 0x%x) with destination 0x%x for " | |
1021 | "reloc at address 0x%x.\n", | |
1022 | (unsigned int) srel, | |
1023 | (unsigned int) old_srel, | |
1024 | (unsigned int) reloc_addr); | |
1025 | ||
1026 | if (avr_stub_is_required_for_16_bit_reloc (srel - base_addr)) | |
1027 | return bfd_reloc_outofrange; | |
1028 | } | |
1029 | ||
adde6300 AM |
1030 | if (srel & 1) |
1031 | return bfd_reloc_outofrange; | |
1032 | srel = srel >> 1; | |
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 | ||
28c9d252 NC |
1038 | case R_AVR_HI8_LDI_GS: |
1039 | use_stubs = (!htab->no_stubs); | |
1040 | /* Fall through. */ | |
adde6300 AM |
1041 | case R_AVR_HI8_LDI_PM: |
1042 | contents += rel->r_offset; | |
1043 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
28c9d252 NC |
1044 | |
1045 | if (use_stubs | |
1046 | && avr_stub_is_required_for_16_bit_reloc (srel - base_addr)) | |
1047 | { | |
1048 | bfd_vma old_srel = srel; | |
1049 | ||
1050 | /* We need to use the address of the stub instead. */ | |
1051 | srel = avr_get_stub_addr (srel, htab); | |
1052 | if (debug_stubs) | |
1053 | printf ("LD: Using jump stub (at 0x%x) with destination 0x%x for " | |
1054 | "reloc at address 0x%x.\n", | |
1055 | (unsigned int) srel, | |
1056 | (unsigned int) old_srel, | |
1057 | (unsigned int) reloc_addr); | |
1058 | ||
1059 | if (avr_stub_is_required_for_16_bit_reloc (srel - base_addr)) | |
1060 | return bfd_reloc_outofrange; | |
1061 | } | |
1062 | ||
adde6300 AM |
1063 | if (srel & 1) |
1064 | return bfd_reloc_outofrange; | |
1065 | srel = srel >> 1; | |
1066 | srel = (srel >> 8) & 0xff; | |
1067 | x = bfd_get_16 (input_bfd, contents); | |
1068 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
1069 | bfd_put_16 (input_bfd, x, contents); | |
1070 | break; | |
1071 | ||
1072 | case R_AVR_HH8_LDI_PM: | |
1073 | contents += rel->r_offset; | |
1074 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
1075 | if (srel & 1) | |
1076 | return bfd_reloc_outofrange; | |
1077 | srel = srel >> 1; | |
1078 | srel = (srel >> 16) & 0xff; | |
1079 | x = bfd_get_16 (input_bfd, contents); | |
1080 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
1081 | bfd_put_16 (input_bfd, x, contents); | |
1082 | break; | |
1083 | ||
1084 | case R_AVR_LO8_LDI_PM_NEG: | |
1085 | contents += rel->r_offset; | |
1086 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
1087 | srel = -srel; | |
1088 | if (srel & 1) | |
1089 | return bfd_reloc_outofrange; | |
1090 | srel = srel >> 1; | |
1091 | x = bfd_get_16 (input_bfd, contents); | |
1092 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
1093 | bfd_put_16 (input_bfd, x, contents); | |
1094 | break; | |
1095 | ||
1096 | case R_AVR_HI8_LDI_PM_NEG: | |
1097 | contents += rel->r_offset; | |
1098 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
1099 | srel = -srel; | |
1100 | if (srel & 1) | |
1101 | return bfd_reloc_outofrange; | |
1102 | srel = srel >> 1; | |
1103 | srel = (srel >> 8) & 0xff; | |
1104 | x = bfd_get_16 (input_bfd, contents); | |
1105 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
1106 | bfd_put_16 (input_bfd, x, contents); | |
1107 | break; | |
1108 | ||
1109 | case R_AVR_HH8_LDI_PM_NEG: | |
1110 | contents += rel->r_offset; | |
1111 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
1112 | srel = -srel; | |
1113 | if (srel & 1) | |
1114 | return bfd_reloc_outofrange; | |
1115 | srel = srel >> 1; | |
1116 | srel = (srel >> 16) & 0xff; | |
1117 | x = bfd_get_16 (input_bfd, contents); | |
1118 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
1119 | bfd_put_16 (input_bfd, x, contents); | |
1120 | break; | |
1121 | ||
1122 | case R_AVR_CALL: | |
1123 | contents += rel->r_offset; | |
1124 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
1125 | if (srel & 1) | |
1126 | return bfd_reloc_outofrange; | |
1127 | srel = srel >> 1; | |
1128 | x = bfd_get_16 (input_bfd, contents); | |
1129 | x |= ((srel & 0x10000) | ((srel << 3) & 0x1f00000)) >> 16; | |
1130 | bfd_put_16 (input_bfd, x, contents); | |
dc810e39 | 1131 | bfd_put_16 (input_bfd, (bfd_vma) srel & 0xffff, contents+2); |
adde6300 AM |
1132 | break; |
1133 | ||
28c9d252 NC |
1134 | case R_AVR_16_PM: |
1135 | use_stubs = (!htab->no_stubs); | |
1136 | contents += rel->r_offset; | |
1137 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
1138 | ||
1139 | if (use_stubs | |
1140 | && avr_stub_is_required_for_16_bit_reloc (srel - base_addr)) | |
1141 | { | |
1142 | bfd_vma old_srel = srel; | |
1143 | ||
1144 | /* We need to use the address of the stub instead. */ | |
1145 | srel = avr_get_stub_addr (srel,htab); | |
1146 | if (debug_stubs) | |
1147 | printf ("LD: Using jump stub (at 0x%x) with destination 0x%x for " | |
1148 | "reloc at address 0x%x.\n", | |
1149 | (unsigned int) srel, | |
1150 | (unsigned int) old_srel, | |
1151 | (unsigned int) reloc_addr); | |
1152 | ||
1153 | if (avr_stub_is_required_for_16_bit_reloc (srel - base_addr)) | |
1154 | return bfd_reloc_outofrange; | |
1155 | } | |
1156 | ||
1157 | if (srel & 1) | |
1158 | return bfd_reloc_outofrange; | |
1159 | srel = srel >> 1; | |
1160 | bfd_put_16 (input_bfd, (bfd_vma) srel &0x00ffff, contents); | |
1161 | break; | |
1162 | ||
adde6300 AM |
1163 | default: |
1164 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1165 | contents, rel->r_offset, | |
1166 | relocation, rel->r_addend); | |
1167 | } | |
1168 | ||
1169 | return r; | |
1170 | } | |
1171 | ||
1172 | /* Relocate an AVR ELF section. */ | |
4cdc7696 | 1173 | |
b34976b6 | 1174 | static bfd_boolean |
4cdc7696 NC |
1175 | elf32_avr_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED, |
1176 | struct bfd_link_info *info, | |
1177 | bfd *input_bfd, | |
1178 | asection *input_section, | |
1179 | bfd_byte *contents, | |
1180 | Elf_Internal_Rela *relocs, | |
1181 | Elf_Internal_Sym *local_syms, | |
1182 | asection **local_sections) | |
adde6300 AM |
1183 | { |
1184 | Elf_Internal_Shdr * symtab_hdr; | |
1185 | struct elf_link_hash_entry ** sym_hashes; | |
1186 | Elf_Internal_Rela * rel; | |
1187 | Elf_Internal_Rela * relend; | |
28c9d252 | 1188 | struct elf32_avr_link_hash_table * htab = avr_link_hash_table (info); |
adde6300 | 1189 | |
4dfe6ac6 NC |
1190 | if (htab == NULL) |
1191 | return FALSE; | |
1192 | ||
adde6300 AM |
1193 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
1194 | sym_hashes = elf_sym_hashes (input_bfd); | |
1195 | relend = relocs + input_section->reloc_count; | |
1196 | ||
1197 | for (rel = relocs; rel < relend; rel ++) | |
1198 | { | |
1199 | reloc_howto_type * howto; | |
1200 | unsigned long r_symndx; | |
1201 | Elf_Internal_Sym * sym; | |
1202 | asection * sec; | |
1203 | struct elf_link_hash_entry * h; | |
1204 | bfd_vma relocation; | |
1205 | bfd_reloc_status_type r; | |
dfeffb9f | 1206 | const char * name; |
adde6300 AM |
1207 | int r_type; |
1208 | ||
1209 | r_type = ELF32_R_TYPE (rel->r_info); | |
1210 | r_symndx = ELF32_R_SYM (rel->r_info); | |
c7e2358a | 1211 | howto = elf_avr_howto_table + r_type; |
adde6300 AM |
1212 | h = NULL; |
1213 | sym = NULL; | |
1214 | sec = NULL; | |
1215 | ||
1216 | if (r_symndx < symtab_hdr->sh_info) | |
1217 | { | |
1218 | sym = local_syms + r_symndx; | |
1219 | sec = local_sections [r_symndx]; | |
8517fae7 | 1220 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
adde6300 AM |
1221 | |
1222 | name = bfd_elf_string_from_elf_section | |
1223 | (input_bfd, symtab_hdr->sh_link, sym->st_name); | |
1224 | name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; | |
1225 | } | |
1226 | else | |
1227 | { | |
59c2e50f | 1228 | bfd_boolean unresolved_reloc, warned; |
adde6300 | 1229 | |
b2a8e766 AM |
1230 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
1231 | r_symndx, symtab_hdr, sym_hashes, | |
1232 | h, sec, relocation, | |
1233 | unresolved_reloc, warned); | |
dfeffb9f L |
1234 | |
1235 | name = h->root.root.string; | |
adde6300 AM |
1236 | } |
1237 | ||
dbaa2011 | 1238 | if (sec != NULL && discarded_section (sec)) |
e4067dbb | 1239 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
545fd46b | 1240 | rel, 1, relend, howto, 0, contents); |
ab96bf03 AM |
1241 | |
1242 | if (info->relocatable) | |
1243 | continue; | |
1244 | ||
adde6300 | 1245 | r = avr_final_link_relocate (howto, input_bfd, input_section, |
28c9d252 | 1246 | contents, rel, relocation, htab); |
adde6300 AM |
1247 | |
1248 | if (r != bfd_reloc_ok) | |
1249 | { | |
1250 | const char * msg = (const char *) NULL; | |
1251 | ||
1252 | switch (r) | |
1253 | { | |
1254 | case bfd_reloc_overflow: | |
1255 | r = info->callbacks->reloc_overflow | |
dfeffb9f L |
1256 | (info, (h ? &h->root : NULL), |
1257 | name, howto->name, (bfd_vma) 0, | |
adde6300 AM |
1258 | input_bfd, input_section, rel->r_offset); |
1259 | break; | |
1260 | ||
1261 | case bfd_reloc_undefined: | |
1262 | r = info->callbacks->undefined_symbol | |
b34976b6 | 1263 | (info, name, input_bfd, input_section, rel->r_offset, TRUE); |
adde6300 AM |
1264 | break; |
1265 | ||
1266 | case bfd_reloc_outofrange: | |
1267 | msg = _("internal error: out of range error"); | |
1268 | break; | |
1269 | ||
1270 | case bfd_reloc_notsupported: | |
1271 | msg = _("internal error: unsupported relocation error"); | |
1272 | break; | |
1273 | ||
1274 | case bfd_reloc_dangerous: | |
1275 | msg = _("internal error: dangerous relocation"); | |
1276 | break; | |
1277 | ||
1278 | default: | |
1279 | msg = _("internal error: unknown error"); | |
1280 | break; | |
1281 | } | |
1282 | ||
1283 | if (msg) | |
1284 | r = info->callbacks->warning | |
1285 | (info, msg, name, input_bfd, input_section, rel->r_offset); | |
1286 | ||
1287 | if (! r) | |
b34976b6 | 1288 | return FALSE; |
adde6300 AM |
1289 | } |
1290 | } | |
1291 | ||
b34976b6 | 1292 | return TRUE; |
adde6300 AM |
1293 | } |
1294 | ||
1295 | /* The final processing done just before writing out a AVR ELF object | |
1296 | file. This gets the AVR architecture right based on the machine | |
1297 | number. */ | |
1298 | ||
1299 | static void | |
4cdc7696 NC |
1300 | bfd_elf_avr_final_write_processing (bfd *abfd, |
1301 | bfd_boolean linker ATTRIBUTE_UNUSED) | |
adde6300 AM |
1302 | { |
1303 | unsigned long val; | |
1304 | ||
1305 | switch (bfd_get_mach (abfd)) | |
1306 | { | |
1307 | default: | |
1308 | case bfd_mach_avr2: | |
1309 | val = E_AVR_MACH_AVR2; | |
1310 | break; | |
1311 | ||
1312 | case bfd_mach_avr1: | |
1313 | val = E_AVR_MACH_AVR1; | |
1314 | break; | |
1315 | ||
7b21ac3f EW |
1316 | case bfd_mach_avr25: |
1317 | val = E_AVR_MACH_AVR25; | |
28b02751 | 1318 | break; |
7b21ac3f | 1319 | |
adde6300 AM |
1320 | case bfd_mach_avr3: |
1321 | val = E_AVR_MACH_AVR3; | |
1322 | break; | |
1323 | ||
7b21ac3f EW |
1324 | case bfd_mach_avr31: |
1325 | val = E_AVR_MACH_AVR31; | |
28b02751 | 1326 | break; |
7b21ac3f EW |
1327 | |
1328 | case bfd_mach_avr35: | |
1329 | val = E_AVR_MACH_AVR35; | |
28b02751 | 1330 | break; |
7b21ac3f | 1331 | |
adde6300 AM |
1332 | case bfd_mach_avr4: |
1333 | val = E_AVR_MACH_AVR4; | |
1334 | break; | |
1335 | ||
65aa24b6 NC |
1336 | case bfd_mach_avr5: |
1337 | val = E_AVR_MACH_AVR5; | |
1338 | break; | |
28c9d252 | 1339 | |
7b21ac3f EW |
1340 | case bfd_mach_avr51: |
1341 | val = E_AVR_MACH_AVR51; | |
1342 | break; | |
1343 | ||
28c9d252 NC |
1344 | case bfd_mach_avr6: |
1345 | val = E_AVR_MACH_AVR6; | |
1346 | break; | |
8cc66334 EW |
1347 | |
1348 | case bfd_mach_avrxmega1: | |
1349 | val = E_AVR_MACH_XMEGA1; | |
1350 | break; | |
1351 | ||
1352 | case bfd_mach_avrxmega2: | |
1353 | val = E_AVR_MACH_XMEGA2; | |
1354 | break; | |
1355 | ||
1356 | case bfd_mach_avrxmega3: | |
1357 | val = E_AVR_MACH_XMEGA3; | |
1358 | break; | |
1359 | ||
1360 | case bfd_mach_avrxmega4: | |
1361 | val = E_AVR_MACH_XMEGA4; | |
1362 | break; | |
1363 | ||
1364 | case bfd_mach_avrxmega5: | |
1365 | val = E_AVR_MACH_XMEGA5; | |
1366 | break; | |
1367 | ||
1368 | case bfd_mach_avrxmega6: | |
1369 | val = E_AVR_MACH_XMEGA6; | |
1370 | break; | |
1371 | ||
1372 | case bfd_mach_avrxmega7: | |
1373 | val = E_AVR_MACH_XMEGA7; | |
1374 | break; | |
adde6300 AM |
1375 | } |
1376 | ||
1377 | elf_elfheader (abfd)->e_machine = EM_AVR; | |
1378 | elf_elfheader (abfd)->e_flags &= ~ EF_AVR_MACH; | |
1379 | elf_elfheader (abfd)->e_flags |= val; | |
df406460 | 1380 | elf_elfheader (abfd)->e_flags |= EF_AVR_LINKRELAX_PREPARED; |
adde6300 AM |
1381 | } |
1382 | ||
1383 | /* Set the right machine number. */ | |
1384 | ||
b34976b6 | 1385 | static bfd_boolean |
4cdc7696 | 1386 | elf32_avr_object_p (bfd *abfd) |
adde6300 | 1387 | { |
dc810e39 | 1388 | unsigned int e_set = bfd_mach_avr2; |
4cdc7696 | 1389 | |
aa4f99bb AO |
1390 | if (elf_elfheader (abfd)->e_machine == EM_AVR |
1391 | || elf_elfheader (abfd)->e_machine == EM_AVR_OLD) | |
adde6300 AM |
1392 | { |
1393 | int e_mach = elf_elfheader (abfd)->e_flags & EF_AVR_MACH; | |
4cdc7696 | 1394 | |
adde6300 AM |
1395 | switch (e_mach) |
1396 | { | |
1397 | default: | |
1398 | case E_AVR_MACH_AVR2: | |
1399 | e_set = bfd_mach_avr2; | |
1400 | break; | |
1401 | ||
1402 | case E_AVR_MACH_AVR1: | |
1403 | e_set = bfd_mach_avr1; | |
1404 | break; | |
1405 | ||
7b21ac3f EW |
1406 | case E_AVR_MACH_AVR25: |
1407 | e_set = bfd_mach_avr25; | |
1408 | break; | |
1409 | ||
adde6300 AM |
1410 | case E_AVR_MACH_AVR3: |
1411 | e_set = bfd_mach_avr3; | |
1412 | break; | |
1413 | ||
7b21ac3f EW |
1414 | case E_AVR_MACH_AVR31: |
1415 | e_set = bfd_mach_avr31; | |
1416 | break; | |
1417 | ||
1418 | case E_AVR_MACH_AVR35: | |
1419 | e_set = bfd_mach_avr35; | |
1420 | break; | |
1421 | ||
adde6300 AM |
1422 | case E_AVR_MACH_AVR4: |
1423 | e_set = bfd_mach_avr4; | |
1424 | break; | |
65aa24b6 NC |
1425 | |
1426 | case E_AVR_MACH_AVR5: | |
1427 | e_set = bfd_mach_avr5; | |
1428 | break; | |
28c9d252 | 1429 | |
7b21ac3f EW |
1430 | case E_AVR_MACH_AVR51: |
1431 | e_set = bfd_mach_avr51; | |
1432 | break; | |
1433 | ||
28c9d252 NC |
1434 | case E_AVR_MACH_AVR6: |
1435 | e_set = bfd_mach_avr6; | |
1436 | break; | |
8cc66334 EW |
1437 | |
1438 | case E_AVR_MACH_XMEGA1: | |
1439 | e_set = bfd_mach_avrxmega1; | |
1440 | break; | |
1441 | ||
1442 | case E_AVR_MACH_XMEGA2: | |
1443 | e_set = bfd_mach_avrxmega2; | |
1444 | break; | |
1445 | ||
1446 | case E_AVR_MACH_XMEGA3: | |
1447 | e_set = bfd_mach_avrxmega3; | |
1448 | break; | |
1449 | ||
1450 | case E_AVR_MACH_XMEGA4: | |
1451 | e_set = bfd_mach_avrxmega4; | |
1452 | break; | |
1453 | ||
1454 | case E_AVR_MACH_XMEGA5: | |
1455 | e_set = bfd_mach_avrxmega5; | |
1456 | break; | |
1457 | ||
1458 | case E_AVR_MACH_XMEGA6: | |
1459 | e_set = bfd_mach_avrxmega6; | |
1460 | break; | |
1461 | ||
1462 | case E_AVR_MACH_XMEGA7: | |
1463 | e_set = bfd_mach_avrxmega7; | |
1464 | break; | |
adde6300 AM |
1465 | } |
1466 | } | |
1467 | return bfd_default_set_arch_mach (abfd, bfd_arch_avr, | |
1468 | e_set); | |
1469 | } | |
1470 | ||
df406460 | 1471 | |
4cdc7696 NC |
1472 | /* Delete some bytes from a section while changing the size of an instruction. |
1473 | The parameter "addr" denotes the section-relative offset pointing just | |
1474 | behind the shrinked instruction. "addr+count" point at the first | |
1475 | byte just behind the original unshrinked instruction. */ | |
1476 | ||
1477 | static bfd_boolean | |
1478 | elf32_avr_relax_delete_bytes (bfd *abfd, | |
73160847 | 1479 | asection *sec, |
4cdc7696 | 1480 | bfd_vma addr, |
73160847 | 1481 | int count) |
4cdc7696 NC |
1482 | { |
1483 | Elf_Internal_Shdr *symtab_hdr; | |
1484 | unsigned int sec_shndx; | |
1485 | bfd_byte *contents; | |
1486 | Elf_Internal_Rela *irel, *irelend; | |
4cdc7696 NC |
1487 | Elf_Internal_Sym *isym; |
1488 | Elf_Internal_Sym *isymbuf = NULL; | |
4cdc7696 NC |
1489 | bfd_vma toaddr; |
1490 | struct elf_link_hash_entry **sym_hashes; | |
1491 | struct elf_link_hash_entry **end_hashes; | |
1492 | unsigned int symcount; | |
1493 | ||
1494 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1495 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); | |
1496 | contents = elf_section_data (sec)->this_hdr.contents; | |
1497 | ||
4cdc7696 NC |
1498 | toaddr = sec->size; |
1499 | ||
1500 | irel = elf_section_data (sec)->relocs; | |
1501 | irelend = irel + sec->reloc_count; | |
1502 | ||
1503 | /* Actually delete the bytes. */ | |
1504 | if (toaddr - addr - count > 0) | |
1505 | memmove (contents + addr, contents + addr + count, | |
1506 | (size_t) (toaddr - addr - count)); | |
1507 | sec->size -= count; | |
1508 | ||
73160847 | 1509 | /* Adjust all the reloc addresses. */ |
4cdc7696 NC |
1510 | for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) |
1511 | { | |
4cdc7696 | 1512 | bfd_vma old_reloc_address; |
4cdc7696 NC |
1513 | |
1514 | old_reloc_address = (sec->output_section->vma | |
1515 | + sec->output_offset + irel->r_offset); | |
4cdc7696 NC |
1516 | |
1517 | /* Get the new reloc address. */ | |
1518 | if ((irel->r_offset > addr | |
1519 | && irel->r_offset < toaddr)) | |
1520 | { | |
28c9d252 | 1521 | if (debug_relax) |
4cdc7696 NC |
1522 | printf ("Relocation at address 0x%x needs to be moved.\n" |
1523 | "Old section offset: 0x%x, New section offset: 0x%x \n", | |
1524 | (unsigned int) old_reloc_address, | |
1525 | (unsigned int) irel->r_offset, | |
1526 | (unsigned int) ((irel->r_offset) - count)); | |
1527 | ||
1528 | irel->r_offset -= count; | |
1529 | } | |
1530 | ||
73160847 | 1531 | } |
4cdc7696 | 1532 | |
73160847 NC |
1533 | /* The reloc's own addresses are now ok. However, we need to readjust |
1534 | the reloc's addend, i.e. the reloc's value if two conditions are met: | |
1535 | 1.) the reloc is relative to a symbol in this section that | |
1536 | is located in front of the shrinked instruction | |
28c9d252 NC |
1537 | 2.) symbol plus addend end up behind the shrinked instruction. |
1538 | ||
73160847 NC |
1539 | The most common case where this happens are relocs relative to |
1540 | the section-start symbol. | |
28c9d252 | 1541 | |
73160847 NC |
1542 | This step needs to be done for all of the sections of the bfd. */ |
1543 | ||
1544 | { | |
1545 | struct bfd_section *isec; | |
1546 | ||
1547 | for (isec = abfd->sections; isec; isec = isec->next) | |
1548 | { | |
1549 | bfd_vma symval; | |
1550 | bfd_vma shrinked_insn_address; | |
1551 | ||
a1c7aafb NC |
1552 | if (isec->reloc_count == 0) |
1553 | continue; | |
1554 | ||
73160847 NC |
1555 | shrinked_insn_address = (sec->output_section->vma |
1556 | + sec->output_offset + addr - count); | |
1557 | ||
a1c7aafb NC |
1558 | irel = elf_section_data (isec)->relocs; |
1559 | /* PR 12161: Read in the relocs for this section if necessary. */ | |
1560 | if (irel == NULL) | |
1561 | irel = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL, FALSE); | |
1562 | ||
1563 | for (irelend = irel + isec->reloc_count; | |
73160847 NC |
1564 | irel < irelend; |
1565 | irel++) | |
1566 | { | |
28c9d252 | 1567 | /* Read this BFD's local symbols if we haven't done |
73160847 NC |
1568 | so already. */ |
1569 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) | |
1570 | { | |
1571 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
1572 | if (isymbuf == NULL) | |
1573 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
1574 | symtab_hdr->sh_info, 0, | |
1575 | NULL, NULL, NULL); | |
1576 | if (isymbuf == NULL) | |
1577 | return FALSE; | |
1578 | } | |
1579 | ||
1580 | /* Get the value of the symbol referred to by the reloc. */ | |
1581 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
1582 | { | |
1583 | /* A local symbol. */ | |
73160847 NC |
1584 | asection *sym_sec; |
1585 | ||
1586 | isym = isymbuf + ELF32_R_SYM (irel->r_info); | |
1587 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
1588 | symval = isym->st_value; | |
1589 | /* If the reloc is absolute, it will not have | |
1590 | a symbol or section associated with it. */ | |
1591 | if (sym_sec == sec) | |
28c9d252 | 1592 | { |
73160847 NC |
1593 | symval += sym_sec->output_section->vma |
1594 | + sym_sec->output_offset; | |
4cdc7696 | 1595 | |
28c9d252 | 1596 | if (debug_relax) |
73160847 NC |
1597 | printf ("Checking if the relocation's " |
1598 | "addend needs corrections.\n" | |
1599 | "Address of anchor symbol: 0x%x \n" | |
1600 | "Address of relocation target: 0x%x \n" | |
1601 | "Address of relaxed insn: 0x%x \n", | |
1602 | (unsigned int) symval, | |
1603 | (unsigned int) (symval + irel->r_addend), | |
1604 | (unsigned int) shrinked_insn_address); | |
1605 | ||
1606 | if (symval <= shrinked_insn_address | |
1607 | && (symval + irel->r_addend) > shrinked_insn_address) | |
1608 | { | |
1609 | irel->r_addend -= count; | |
1610 | ||
28c9d252 | 1611 | if (debug_relax) |
73160847 NC |
1612 | printf ("Relocation's addend needed to be fixed \n"); |
1613 | } | |
4cdc7696 | 1614 | } |
73160847 | 1615 | /* else...Reference symbol is absolute. No adjustment needed. */ |
28c9d252 NC |
1616 | } |
1617 | /* else...Reference symbol is extern. No need for adjusting | |
73160847 | 1618 | the addend. */ |
28c9d252 | 1619 | } |
a1c7aafb NC |
1620 | |
1621 | if (elf_section_data (isec)->relocs == NULL) | |
1622 | free (irelend - isec->reloc_count); | |
73160847 NC |
1623 | } |
1624 | } | |
4cdc7696 NC |
1625 | |
1626 | /* Adjust the local symbols defined in this section. */ | |
1627 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; | |
12123067 NC |
1628 | /* Fix PR 9841, there may be no local symbols. */ |
1629 | if (isym != NULL) | |
4cdc7696 | 1630 | { |
12123067 NC |
1631 | Elf_Internal_Sym *isymend; |
1632 | ||
1633 | isymend = isym + symtab_hdr->sh_info; | |
1634 | for (; isym < isymend; isym++) | |
1635 | { | |
1636 | if (isym->st_shndx == sec_shndx | |
1637 | && isym->st_value > addr | |
1638 | && isym->st_value < toaddr) | |
1639 | isym->st_value -= count; | |
1640 | } | |
4cdc7696 NC |
1641 | } |
1642 | ||
1643 | /* Now adjust the global symbols defined in this section. */ | |
1644 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) | |
1645 | - symtab_hdr->sh_info); | |
1646 | sym_hashes = elf_sym_hashes (abfd); | |
1647 | end_hashes = sym_hashes + symcount; | |
1648 | for (; sym_hashes < end_hashes; sym_hashes++) | |
1649 | { | |
1650 | struct elf_link_hash_entry *sym_hash = *sym_hashes; | |
1651 | if ((sym_hash->root.type == bfd_link_hash_defined | |
1652 | || sym_hash->root.type == bfd_link_hash_defweak) | |
1653 | && sym_hash->root.u.def.section == sec | |
1654 | && sym_hash->root.u.def.value > addr | |
1655 | && sym_hash->root.u.def.value < toaddr) | |
1656 | { | |
1657 | sym_hash->root.u.def.value -= count; | |
1658 | } | |
1659 | } | |
1660 | ||
1661 | return TRUE; | |
1662 | } | |
1663 | ||
df406460 NC |
1664 | /* This function handles relaxing for the avr. |
1665 | Many important relaxing opportunities within functions are already | |
1666 | realized by the compiler itself. | |
1667 | Here we try to replace call (4 bytes) -> rcall (2 bytes) | |
4cdc7696 NC |
1668 | and jump -> rjmp (safes also 2 bytes). |
1669 | As well we now optimize seqences of | |
df406460 NC |
1670 | - call/rcall function |
1671 | - ret | |
1672 | to yield | |
1673 | - jmp/rjmp function | |
1674 | - ret | |
1675 | . In case that within a sequence | |
1676 | - jmp/rjmp label | |
1677 | - ret | |
1678 | the ret could no longer be reached it is optimized away. In order | |
1679 | to check if the ret is no longer needed, it is checked that the ret's address | |
1680 | is not the target of a branch or jump within the same section, it is checked | |
1681 | that there is no skip instruction before the jmp/rjmp and that there | |
1682 | is no local or global label place at the address of the ret. | |
4cdc7696 | 1683 | |
df406460 | 1684 | We refrain from relaxing within sections ".vectors" and |
4cdc7696 | 1685 | ".jumptables" in order to maintain the position of the instructions. |
df406460 | 1686 | There, however, we substitute jmp/call by a sequence rjmp,nop/rcall,nop |
4cdc7696 | 1687 | if possible. (In future one could possibly use the space of the nop |
df406460 NC |
1688 | for the first instruction of the irq service function. |
1689 | ||
1690 | The .jumptables sections is meant to be used for a future tablejump variant | |
1691 | for the devices with 3-byte program counter where the table itself | |
4cdc7696 | 1692 | contains 4-byte jump instructions whose relative offset must not |
df406460 | 1693 | be changed. */ |
4cdc7696 | 1694 | |
28c9d252 | 1695 | static bfd_boolean |
4cdc7696 NC |
1696 | elf32_avr_relax_section (bfd *abfd, |
1697 | asection *sec, | |
df406460 NC |
1698 | struct bfd_link_info *link_info, |
1699 | bfd_boolean *again) | |
1700 | { | |
1701 | Elf_Internal_Shdr *symtab_hdr; | |
1702 | Elf_Internal_Rela *internal_relocs; | |
1703 | Elf_Internal_Rela *irel, *irelend; | |
1704 | bfd_byte *contents = NULL; | |
1705 | Elf_Internal_Sym *isymbuf = NULL; | |
28c9d252 NC |
1706 | struct elf32_avr_link_hash_table *htab; |
1707 | ||
526f25b2 EW |
1708 | /* If 'shrinkable' is FALSE, do not shrink by deleting bytes while |
1709 | relaxing. Such shrinking can cause issues for the sections such | |
1710 | as .vectors and .jumptables. Instead the unused bytes should be | |
1711 | filled with nop instructions. */ | |
1712 | bfd_boolean shrinkable = TRUE; | |
1713 | ||
1714 | if (!strcmp (sec->name,".vectors") | |
1715 | || !strcmp (sec->name,".jumptables")) | |
1716 | shrinkable = FALSE; | |
1717 | ||
c8a1f254 NS |
1718 | if (link_info->relocatable) |
1719 | (*link_info->callbacks->einfo) | |
1720 | (_("%P%F: --relax and -r may not be used together\n")); | |
1721 | ||
28c9d252 | 1722 | htab = avr_link_hash_table (link_info); |
64ee10b6 NC |
1723 | if (htab == NULL) |
1724 | return FALSE; | |
df406460 NC |
1725 | |
1726 | /* Assume nothing changes. */ | |
1727 | *again = FALSE; | |
1728 | ||
28c9d252 NC |
1729 | if ((!htab->no_stubs) && (sec == htab->stub_sec)) |
1730 | { | |
1731 | /* We are just relaxing the stub section. | |
1732 | Let's calculate the size needed again. */ | |
1733 | bfd_size_type last_estimated_stub_section_size = htab->stub_sec->size; | |
1734 | ||
1735 | if (debug_relax) | |
1736 | printf ("Relaxing the stub section. Size prior to this pass: %i\n", | |
1737 | (int) last_estimated_stub_section_size); | |
1738 | ||
1739 | elf32_avr_size_stubs (htab->stub_sec->output_section->owner, | |
1740 | link_info, FALSE); | |
1741 | ||
1742 | /* Check if the number of trampolines changed. */ | |
1743 | if (last_estimated_stub_section_size != htab->stub_sec->size) | |
1744 | *again = TRUE; | |
1745 | ||
1746 | if (debug_relax) | |
1747 | printf ("Size of stub section after this pass: %i\n", | |
1748 | (int) htab->stub_sec->size); | |
1749 | ||
1750 | return TRUE; | |
1751 | } | |
1752 | ||
df406460 NC |
1753 | /* We don't have to do anything for a relocatable link, if |
1754 | this section does not have relocs, or if this is not a | |
1755 | code section. */ | |
1756 | if (link_info->relocatable | |
1757 | || (sec->flags & SEC_RELOC) == 0 | |
1758 | || sec->reloc_count == 0 | |
1759 | || (sec->flags & SEC_CODE) == 0) | |
1760 | return TRUE; | |
4cdc7696 | 1761 | |
df406460 NC |
1762 | /* Check if the object file to relax uses internal symbols so that we |
1763 | could fix up the relocations. */ | |
df406460 NC |
1764 | if (!(elf_elfheader (abfd)->e_flags & EF_AVR_LINKRELAX_PREPARED)) |
1765 | return TRUE; | |
df406460 NC |
1766 | |
1767 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1768 | ||
1769 | /* Get a copy of the native relocations. */ | |
1770 | internal_relocs = (_bfd_elf_link_read_relocs | |
4cdc7696 | 1771 | (abfd, sec, NULL, NULL, link_info->keep_memory)); |
df406460 NC |
1772 | if (internal_relocs == NULL) |
1773 | goto error_return; | |
1774 | ||
df406460 NC |
1775 | /* Walk through the relocs looking for relaxing opportunities. */ |
1776 | irelend = internal_relocs + sec->reloc_count; | |
1777 | for (irel = internal_relocs; irel < irelend; irel++) | |
1778 | { | |
1779 | bfd_vma symval; | |
1780 | ||
4cdc7696 | 1781 | if ( ELF32_R_TYPE (irel->r_info) != R_AVR_13_PCREL |
91d6fa6a NC |
1782 | && ELF32_R_TYPE (irel->r_info) != R_AVR_7_PCREL |
1783 | && ELF32_R_TYPE (irel->r_info) != R_AVR_CALL) | |
df406460 | 1784 | continue; |
4cdc7696 | 1785 | |
df406460 NC |
1786 | /* Get the section contents if we haven't done so already. */ |
1787 | if (contents == NULL) | |
1788 | { | |
1789 | /* Get cached copy if it exists. */ | |
1790 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1791 | contents = elf_section_data (sec)->this_hdr.contents; | |
1792 | else | |
1793 | { | |
1794 | /* Go get them off disk. */ | |
4cdc7696 | 1795 | if (! bfd_malloc_and_get_section (abfd, sec, &contents)) |
df406460 NC |
1796 | goto error_return; |
1797 | } | |
1798 | } | |
1799 | ||
91d6fa6a | 1800 | /* Read this BFD's local symbols if we haven't done so already. */ |
df406460 NC |
1801 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) |
1802 | { | |
1803 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
1804 | if (isymbuf == NULL) | |
1805 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
1806 | symtab_hdr->sh_info, 0, | |
1807 | NULL, NULL, NULL); | |
1808 | if (isymbuf == NULL) | |
1809 | goto error_return; | |
1810 | } | |
1811 | ||
1812 | ||
1813 | /* Get the value of the symbol referred to by the reloc. */ | |
1814 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
1815 | { | |
1816 | /* A local symbol. */ | |
1817 | Elf_Internal_Sym *isym; | |
1818 | asection *sym_sec; | |
1819 | ||
1820 | isym = isymbuf + ELF32_R_SYM (irel->r_info); | |
1821 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
1822 | symval = isym->st_value; | |
1823 | /* If the reloc is absolute, it will not have | |
1824 | a symbol or section associated with it. */ | |
1825 | if (sym_sec) | |
1826 | symval += sym_sec->output_section->vma | |
1827 | + sym_sec->output_offset; | |
1828 | } | |
1829 | else | |
1830 | { | |
1831 | unsigned long indx; | |
1832 | struct elf_link_hash_entry *h; | |
1833 | ||
1834 | /* An external symbol. */ | |
1835 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; | |
1836 | h = elf_sym_hashes (abfd)[indx]; | |
1837 | BFD_ASSERT (h != NULL); | |
1838 | if (h->root.type != bfd_link_hash_defined | |
1839 | && h->root.type != bfd_link_hash_defweak) | |
4cdc7696 NC |
1840 | /* This appears to be a reference to an undefined |
1841 | symbol. Just ignore it--it will be caught by the | |
1842 | regular reloc processing. */ | |
1843 | continue; | |
1844 | ||
df406460 NC |
1845 | symval = (h->root.u.def.value |
1846 | + h->root.u.def.section->output_section->vma | |
1847 | + h->root.u.def.section->output_offset); | |
1848 | } | |
1849 | ||
1850 | /* For simplicity of coding, we are going to modify the section | |
1851 | contents, the section relocs, and the BFD symbol table. We | |
1852 | must tell the rest of the code not to free up this | |
1853 | information. It would be possible to instead create a table | |
1854 | of changes which have to be made, as is done in coff-mips.c; | |
1855 | that would be more work, but would require less memory when | |
1856 | the linker is run. */ | |
1857 | switch (ELF32_R_TYPE (irel->r_info)) | |
1858 | { | |
91d6fa6a NC |
1859 | /* Try to turn a 22-bit absolute call/jump into an 13-bit |
1860 | pc-relative rcall/rjmp. */ | |
1861 | case R_AVR_CALL: | |
df406460 NC |
1862 | { |
1863 | bfd_vma value = symval + irel->r_addend; | |
1864 | bfd_vma dot, gap; | |
1865 | int distance_short_enough = 0; | |
1866 | ||
1867 | /* Get the address of this instruction. */ | |
1868 | dot = (sec->output_section->vma | |
1869 | + sec->output_offset + irel->r_offset); | |
1870 | ||
1871 | /* Compute the distance from this insn to the branch target. */ | |
1872 | gap = value - dot; | |
1873 | ||
526f25b2 EW |
1874 | /* Check if the gap falls in the range that can be accommodated |
1875 | in 13bits signed (It is 12bits when encoded, as we deal with | |
1876 | word addressing). */ | |
1877 | if (!shrinkable && ((int) gap >= -4096 && (int) gap <= 4095)) | |
1878 | distance_short_enough = 1; | |
1879 | /* If shrinkable, then we can check for a range of distance which | |
1880 | is two bytes farther on both the directions because the call | |
1881 | or jump target will be closer by two bytes after the | |
1882 | relaxation. */ | |
1883 | else if (shrinkable && ((int) gap >= -4094 && (int) gap <= 4097)) | |
df406460 NC |
1884 | distance_short_enough = 1; |
1885 | ||
1886 | /* Here we handle the wrap-around case. E.g. for a 16k device | |
4cdc7696 | 1887 | we could use a rjmp to jump from address 0x100 to 0x3d00! |
df406460 NC |
1888 | In order to make this work properly, we need to fill the |
1889 | vaiable avr_pc_wrap_around with the appropriate value. | |
1890 | I.e. 0x4000 for a 16k device. */ | |
1891 | { | |
91d6fa6a NC |
1892 | /* Shrinking the code size makes the gaps larger in the |
1893 | case of wrap-arounds. So we use a heuristical safety | |
1894 | margin to avoid that during relax the distance gets | |
1895 | again too large for the short jumps. Let's assume | |
1896 | a typical code-size reduction due to relax for a | |
1897 | 16k device of 600 bytes. So let's use twice the | |
1898 | typical value as safety margin. */ | |
1899 | int rgap; | |
1900 | int safety_margin; | |
1901 | ||
1902 | int assumed_shrink = 600; | |
1903 | if (avr_pc_wrap_around > 0x4000) | |
1904 | assumed_shrink = 900; | |
1905 | ||
1906 | safety_margin = 2 * assumed_shrink; | |
1907 | ||
1908 | rgap = avr_relative_distance_considering_wrap_around (gap); | |
1909 | ||
1910 | if (rgap >= (-4092 + safety_margin) | |
1911 | && rgap <= (4094 - safety_margin)) | |
1912 | distance_short_enough = 1; | |
4cdc7696 | 1913 | } |
df406460 NC |
1914 | |
1915 | if (distance_short_enough) | |
1916 | { | |
1917 | unsigned char code_msb; | |
1918 | unsigned char code_lsb; | |
1919 | ||
28c9d252 | 1920 | if (debug_relax) |
df406460 NC |
1921 | printf ("shrinking jump/call instruction at address 0x%x" |
1922 | " in section %s\n\n", | |
1923 | (int) dot, sec->name); | |
1924 | ||
1925 | /* Note that we've changed the relocs, section contents, | |
1926 | etc. */ | |
1927 | elf_section_data (sec)->relocs = internal_relocs; | |
1928 | elf_section_data (sec)->this_hdr.contents = contents; | |
1929 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
1930 | ||
1931 | /* Get the instruction code for relaxing. */ | |
1932 | code_lsb = bfd_get_8 (abfd, contents + irel->r_offset); | |
1933 | code_msb = bfd_get_8 (abfd, contents + irel->r_offset + 1); | |
1934 | ||
1935 | /* Mask out the relocation bits. */ | |
1936 | code_msb &= 0x94; | |
1937 | code_lsb &= 0x0E; | |
1938 | if (code_msb == 0x94 && code_lsb == 0x0E) | |
1939 | { | |
1940 | /* we are changing call -> rcall . */ | |
1941 | bfd_put_8 (abfd, 0x00, contents + irel->r_offset); | |
1942 | bfd_put_8 (abfd, 0xD0, contents + irel->r_offset + 1); | |
1943 | } | |
1944 | else if (code_msb == 0x94 && code_lsb == 0x0C) | |
1945 | { | |
1946 | /* we are changeing jump -> rjmp. */ | |
1947 | bfd_put_8 (abfd, 0x00, contents + irel->r_offset); | |
1948 | bfd_put_8 (abfd, 0xC0, contents + irel->r_offset + 1); | |
1949 | } | |
4cdc7696 | 1950 | else |
df406460 NC |
1951 | abort (); |
1952 | ||
1953 | /* Fix the relocation's type. */ | |
1954 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
1955 | R_AVR_13_PCREL); | |
1956 | ||
526f25b2 EW |
1957 | /* We should not modify the ordering if 'shrinkable' is |
1958 | FALSE. */ | |
1959 | if (!shrinkable) | |
df406460 NC |
1960 | { |
1961 | /* Let's insert a nop. */ | |
1962 | bfd_put_8 (abfd, 0x00, contents + irel->r_offset + 2); | |
1963 | bfd_put_8 (abfd, 0x00, contents + irel->r_offset + 3); | |
1964 | } | |
1965 | else | |
1966 | { | |
1967 | /* Delete two bytes of data. */ | |
1968 | if (!elf32_avr_relax_delete_bytes (abfd, sec, | |
1969 | irel->r_offset + 2, 2)) | |
1970 | goto error_return; | |
1971 | ||
1972 | /* That will change things, so, we should relax again. | |
1973 | Note that this is not required, and it may be slow. */ | |
1974 | *again = TRUE; | |
1975 | } | |
1976 | } | |
1977 | } | |
4cdc7696 | 1978 | |
df406460 NC |
1979 | default: |
1980 | { | |
1981 | unsigned char code_msb; | |
1982 | unsigned char code_lsb; | |
1983 | bfd_vma dot; | |
1984 | ||
1985 | code_msb = bfd_get_8 (abfd, contents + irel->r_offset + 1); | |
1986 | code_lsb = bfd_get_8 (abfd, contents + irel->r_offset + 0); | |
1987 | ||
1988 | /* Get the address of this instruction. */ | |
1989 | dot = (sec->output_section->vma | |
1990 | + sec->output_offset + irel->r_offset); | |
4cdc7696 NC |
1991 | |
1992 | /* Here we look for rcall/ret or call/ret sequences that could be | |
28c9d252 NC |
1993 | safely replaced by rjmp/ret or jmp/ret. */ |
1994 | if (((code_msb & 0xf0) == 0xd0) | |
1995 | && avr_replace_call_ret_sequences) | |
df406460 NC |
1996 | { |
1997 | /* This insn is a rcall. */ | |
1998 | unsigned char next_insn_msb = 0; | |
1999 | unsigned char next_insn_lsb = 0; | |
2000 | ||
2001 | if (irel->r_offset + 3 < sec->size) | |
2002 | { | |
4cdc7696 | 2003 | next_insn_msb = |
91d6fa6a | 2004 | bfd_get_8 (abfd, contents + irel->r_offset + 3); |
4cdc7696 | 2005 | next_insn_lsb = |
91d6fa6a | 2006 | bfd_get_8 (abfd, contents + irel->r_offset + 2); |
df406460 | 2007 | } |
4cdc7696 NC |
2008 | |
2009 | if ((0x95 == next_insn_msb) && (0x08 == next_insn_lsb)) | |
df406460 NC |
2010 | { |
2011 | /* The next insn is a ret. We now convert the rcall insn | |
2012 | into a rjmp instruction. */ | |
df406460 NC |
2013 | code_msb &= 0xef; |
2014 | bfd_put_8 (abfd, code_msb, contents + irel->r_offset + 1); | |
28c9d252 | 2015 | if (debug_relax) |
df406460 NC |
2016 | printf ("converted rcall/ret sequence at address 0x%x" |
2017 | " into rjmp/ret sequence. Section is %s\n\n", | |
2018 | (int) dot, sec->name); | |
2019 | *again = TRUE; | |
2020 | break; | |
2021 | } | |
2022 | } | |
2023 | else if ((0x94 == (code_msb & 0xfe)) | |
28c9d252 NC |
2024 | && (0x0e == (code_lsb & 0x0e)) |
2025 | && avr_replace_call_ret_sequences) | |
df406460 NC |
2026 | { |
2027 | /* This insn is a call. */ | |
2028 | unsigned char next_insn_msb = 0; | |
2029 | unsigned char next_insn_lsb = 0; | |
2030 | ||
2031 | if (irel->r_offset + 5 < sec->size) | |
2032 | { | |
2033 | next_insn_msb = | |
91d6fa6a | 2034 | bfd_get_8 (abfd, contents + irel->r_offset + 5); |
df406460 | 2035 | next_insn_lsb = |
91d6fa6a | 2036 | bfd_get_8 (abfd, contents + irel->r_offset + 4); |
df406460 | 2037 | } |
4cdc7696 | 2038 | |
df406460 NC |
2039 | if ((0x95 == next_insn_msb) && (0x08 == next_insn_lsb)) |
2040 | { | |
2041 | /* The next insn is a ret. We now convert the call insn | |
2042 | into a jmp instruction. */ | |
2043 | ||
2044 | code_lsb &= 0xfd; | |
2045 | bfd_put_8 (abfd, code_lsb, contents + irel->r_offset); | |
28c9d252 | 2046 | if (debug_relax) |
df406460 NC |
2047 | printf ("converted call/ret sequence at address 0x%x" |
2048 | " into jmp/ret sequence. Section is %s\n\n", | |
2049 | (int) dot, sec->name); | |
2050 | *again = TRUE; | |
2051 | break; | |
2052 | } | |
2053 | } | |
4cdc7696 NC |
2054 | else if ((0xc0 == (code_msb & 0xf0)) |
2055 | || ((0x94 == (code_msb & 0xfe)) | |
df406460 NC |
2056 | && (0x0c == (code_lsb & 0x0e)))) |
2057 | { | |
4cdc7696 | 2058 | /* This insn is a rjmp or a jmp. */ |
df406460 NC |
2059 | unsigned char next_insn_msb = 0; |
2060 | unsigned char next_insn_lsb = 0; | |
2061 | int insn_size; | |
2062 | ||
2063 | if (0xc0 == (code_msb & 0xf0)) | |
2064 | insn_size = 2; /* rjmp insn */ | |
2065 | else | |
2066 | insn_size = 4; /* jmp insn */ | |
2067 | ||
2068 | if (irel->r_offset + insn_size + 1 < sec->size) | |
2069 | { | |
4cdc7696 | 2070 | next_insn_msb = |
91d6fa6a NC |
2071 | bfd_get_8 (abfd, contents + irel->r_offset |
2072 | + insn_size + 1); | |
4cdc7696 | 2073 | next_insn_lsb = |
91d6fa6a NC |
2074 | bfd_get_8 (abfd, contents + irel->r_offset |
2075 | + insn_size); | |
df406460 NC |
2076 | } |
2077 | ||
2078 | if ((0x95 == next_insn_msb) && (0x08 == next_insn_lsb)) | |
2079 | { | |
2080 | /* The next insn is a ret. We possibly could delete | |
cc643b88 | 2081 | this ret. First we need to check for preceding |
df406460 NC |
2082 | sbis/sbic/sbrs or cpse "skip" instructions. */ |
2083 | ||
cc643b88 | 2084 | int there_is_preceding_non_skip_insn = 1; |
df406460 NC |
2085 | bfd_vma address_of_ret; |
2086 | ||
2087 | address_of_ret = dot + insn_size; | |
2088 | ||
28c9d252 | 2089 | if (debug_relax && (insn_size == 2)) |
4cdc7696 | 2090 | printf ("found rjmp / ret sequence at address 0x%x\n", |
df406460 | 2091 | (int) dot); |
28c9d252 | 2092 | if (debug_relax && (insn_size == 4)) |
4cdc7696 | 2093 | printf ("found jmp / ret sequence at address 0x%x\n", |
df406460 NC |
2094 | (int) dot); |
2095 | ||
cc643b88 | 2096 | /* We have to make sure that there is a preceding insn. */ |
df406460 NC |
2097 | if (irel->r_offset >= 2) |
2098 | { | |
cc643b88 NC |
2099 | unsigned char preceding_msb; |
2100 | unsigned char preceding_lsb; | |
2101 | ||
2102 | preceding_msb = | |
91d6fa6a | 2103 | bfd_get_8 (abfd, contents + irel->r_offset - 1); |
cc643b88 | 2104 | preceding_lsb = |
91d6fa6a | 2105 | bfd_get_8 (abfd, contents + irel->r_offset - 2); |
df406460 NC |
2106 | |
2107 | /* sbic. */ | |
cc643b88 NC |
2108 | if (0x99 == preceding_msb) |
2109 | there_is_preceding_non_skip_insn = 0; | |
df406460 NC |
2110 | |
2111 | /* sbis. */ | |
cc643b88 NC |
2112 | if (0x9b == preceding_msb) |
2113 | there_is_preceding_non_skip_insn = 0; | |
df406460 NC |
2114 | |
2115 | /* sbrc */ | |
cc643b88 NC |
2116 | if ((0xfc == (preceding_msb & 0xfe) |
2117 | && (0x00 == (preceding_lsb & 0x08)))) | |
2118 | there_is_preceding_non_skip_insn = 0; | |
df406460 | 2119 | |
4cdc7696 | 2120 | /* sbrs */ |
cc643b88 NC |
2121 | if ((0xfe == (preceding_msb & 0xfe) |
2122 | && (0x00 == (preceding_lsb & 0x08)))) | |
2123 | there_is_preceding_non_skip_insn = 0; | |
4cdc7696 | 2124 | |
df406460 | 2125 | /* cpse */ |
cc643b88 NC |
2126 | if (0x10 == (preceding_msb & 0xfc)) |
2127 | there_is_preceding_non_skip_insn = 0; | |
4cdc7696 | 2128 | |
cc643b88 | 2129 | if (there_is_preceding_non_skip_insn == 0) |
28c9d252 | 2130 | if (debug_relax) |
cc643b88 NC |
2131 | printf ("preceding skip insn prevents deletion of" |
2132 | " ret insn at Addy 0x%x in section %s\n", | |
df406460 NC |
2133 | (int) dot + 2, sec->name); |
2134 | } | |
2135 | else | |
2136 | { | |
2137 | /* There is no previous instruction. */ | |
cc643b88 | 2138 | there_is_preceding_non_skip_insn = 0; |
4cdc7696 | 2139 | } |
df406460 | 2140 | |
cc643b88 | 2141 | if (there_is_preceding_non_skip_insn) |
df406460 NC |
2142 | { |
2143 | /* We now only have to make sure that there is no | |
2144 | local label defined at the address of the ret | |
2145 | instruction and that there is no local relocation | |
2146 | in this section pointing to the ret. */ | |
2147 | ||
2148 | int deleting_ret_is_safe = 1; | |
4cdc7696 | 2149 | unsigned int section_offset_of_ret_insn = |
91d6fa6a | 2150 | irel->r_offset + insn_size; |
df406460 NC |
2151 | Elf_Internal_Sym *isym, *isymend; |
2152 | unsigned int sec_shndx; | |
4cdc7696 NC |
2153 | |
2154 | sec_shndx = | |
2155 | _bfd_elf_section_from_bfd_section (abfd, sec); | |
df406460 NC |
2156 | |
2157 | /* Check for local symbols. */ | |
2158 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; | |
2159 | isymend = isym + symtab_hdr->sh_info; | |
696b7ad2 NC |
2160 | /* PR 6019: There may not be any local symbols. */ |
2161 | for (; isym != NULL && isym < isymend; isym++) | |
91d6fa6a NC |
2162 | { |
2163 | if (isym->st_value == section_offset_of_ret_insn | |
2164 | && isym->st_shndx == sec_shndx) | |
2165 | { | |
2166 | deleting_ret_is_safe = 0; | |
2167 | if (debug_relax) | |
2168 | printf ("local label prevents deletion of ret " | |
2169 | "insn at address 0x%x\n", | |
2170 | (int) dot + insn_size); | |
2171 | } | |
2172 | } | |
2173 | ||
2174 | /* Now check for global symbols. */ | |
2175 | { | |
2176 | int symcount; | |
2177 | struct elf_link_hash_entry **sym_hashes; | |
2178 | struct elf_link_hash_entry **end_hashes; | |
2179 | ||
2180 | symcount = (symtab_hdr->sh_size | |
2181 | / sizeof (Elf32_External_Sym) | |
2182 | - symtab_hdr->sh_info); | |
2183 | sym_hashes = elf_sym_hashes (abfd); | |
2184 | end_hashes = sym_hashes + symcount; | |
2185 | for (; sym_hashes < end_hashes; sym_hashes++) | |
2186 | { | |
2187 | struct elf_link_hash_entry *sym_hash = | |
2188 | *sym_hashes; | |
2189 | if ((sym_hash->root.type == bfd_link_hash_defined | |
2190 | || sym_hash->root.type == | |
4cdc7696 | 2191 | bfd_link_hash_defweak) |
91d6fa6a NC |
2192 | && sym_hash->root.u.def.section == sec |
2193 | && sym_hash->root.u.def.value == section_offset_of_ret_insn) | |
2194 | { | |
2195 | deleting_ret_is_safe = 0; | |
2196 | if (debug_relax) | |
2197 | printf ("global label prevents deletion of " | |
2198 | "ret insn at address 0x%x\n", | |
2199 | (int) dot + insn_size); | |
2200 | } | |
2201 | } | |
2202 | } | |
2203 | /* Now we check for relocations pointing to ret. */ | |
2204 | { | |
2205 | Elf_Internal_Rela *rel; | |
2206 | Elf_Internal_Rela *relend; | |
2207 | ||
2208 | relend = elf_section_data (sec)->relocs | |
2209 | + sec->reloc_count; | |
2210 | ||
2211 | for (rel = elf_section_data (sec)->relocs; | |
2212 | rel < relend; rel++) | |
2213 | { | |
2214 | bfd_vma reloc_target = 0; | |
2215 | ||
2216 | /* Read this BFD's local symbols if we haven't | |
2217 | done so already. */ | |
2218 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) | |
2219 | { | |
2220 | isymbuf = (Elf_Internal_Sym *) | |
2221 | symtab_hdr->contents; | |
2222 | if (isymbuf == NULL) | |
2223 | isymbuf = bfd_elf_get_elf_syms | |
2224 | (abfd, | |
2225 | symtab_hdr, | |
2226 | symtab_hdr->sh_info, 0, | |
2227 | NULL, NULL, NULL); | |
2228 | if (isymbuf == NULL) | |
2229 | break; | |
2230 | } | |
2231 | ||
2232 | /* Get the value of the symbol referred to | |
2233 | by the reloc. */ | |
2234 | if (ELF32_R_SYM (rel->r_info) | |
2235 | < symtab_hdr->sh_info) | |
2236 | { | |
2237 | /* A local symbol. */ | |
2238 | asection *sym_sec; | |
2239 | ||
2240 | isym = isymbuf | |
2241 | + ELF32_R_SYM (rel->r_info); | |
2242 | sym_sec = bfd_section_from_elf_index | |
2243 | (abfd, isym->st_shndx); | |
2244 | symval = isym->st_value; | |
2245 | ||
2246 | /* If the reloc is absolute, it will not | |
2247 | have a symbol or section associated | |
2248 | with it. */ | |
2249 | ||
2250 | if (sym_sec) | |
2251 | { | |
2252 | symval += | |
2253 | sym_sec->output_section->vma | |
2254 | + sym_sec->output_offset; | |
2255 | reloc_target = symval + rel->r_addend; | |
2256 | } | |
2257 | else | |
2258 | { | |
2259 | reloc_target = symval + rel->r_addend; | |
2260 | /* Reference symbol is absolute. */ | |
2261 | } | |
2262 | } | |
2263 | /* else ... reference symbol is extern. */ | |
2264 | ||
2265 | if (address_of_ret == reloc_target) | |
2266 | { | |
2267 | deleting_ret_is_safe = 0; | |
2268 | if (debug_relax) | |
2269 | printf ("ret from " | |
2270 | "rjmp/jmp ret sequence at address" | |
2271 | " 0x%x could not be deleted. ret" | |
2272 | " is target of a relocation.\n", | |
2273 | (int) address_of_ret); | |
2274 | } | |
2275 | } | |
2276 | } | |
2277 | ||
2278 | if (deleting_ret_is_safe) | |
2279 | { | |
2280 | if (debug_relax) | |
2281 | printf ("unreachable ret instruction " | |
2282 | "at address 0x%x deleted.\n", | |
2283 | (int) dot + insn_size); | |
2284 | ||
2285 | /* Delete two bytes of data. */ | |
2286 | if (!elf32_avr_relax_delete_bytes (abfd, sec, | |
2287 | irel->r_offset + insn_size, 2)) | |
2288 | goto error_return; | |
2289 | ||
2290 | /* That will change things, so, we should relax | |
2291 | again. Note that this is not required, and it | |
2292 | may be slow. */ | |
2293 | *again = TRUE; | |
2294 | break; | |
2295 | } | |
df406460 | 2296 | } |
4cdc7696 NC |
2297 | |
2298 | } | |
2299 | } | |
df406460 NC |
2300 | break; |
2301 | } | |
2302 | } | |
2303 | } | |
2304 | ||
2305 | if (contents != NULL | |
2306 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2307 | { | |
2308 | if (! link_info->keep_memory) | |
2309 | free (contents); | |
2310 | else | |
2311 | { | |
2312 | /* Cache the section contents for elf_link_input_bfd. */ | |
2313 | elf_section_data (sec)->this_hdr.contents = contents; | |
2314 | } | |
2315 | } | |
2316 | ||
2317 | if (internal_relocs != NULL | |
2318 | && elf_section_data (sec)->relocs != internal_relocs) | |
2319 | free (internal_relocs); | |
2320 | ||
2321 | return TRUE; | |
2322 | ||
2323 | error_return: | |
2324 | if (isymbuf != NULL | |
2325 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
2326 | free (isymbuf); | |
2327 | if (contents != NULL | |
2328 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2329 | free (contents); | |
2330 | if (internal_relocs != NULL | |
2331 | && elf_section_data (sec)->relocs != internal_relocs) | |
2332 | free (internal_relocs); | |
2333 | ||
4cdc7696 | 2334 | return FALSE; |
df406460 NC |
2335 | } |
2336 | ||
2337 | /* This is a version of bfd_generic_get_relocated_section_contents | |
4cdc7696 | 2338 | which uses elf32_avr_relocate_section. |
df406460 | 2339 | |
4cdc7696 | 2340 | For avr it's essentially a cut and paste taken from the H8300 port. |
df406460 | 2341 | The author of the relaxation support patch for avr had absolutely no |
4cdc7696 | 2342 | clue what is happening here but found out that this part of the code |
df406460 NC |
2343 | seems to be important. */ |
2344 | ||
2345 | static bfd_byte * | |
2346 | elf32_avr_get_relocated_section_contents (bfd *output_bfd, | |
2347 | struct bfd_link_info *link_info, | |
2348 | struct bfd_link_order *link_order, | |
2349 | bfd_byte *data, | |
2350 | bfd_boolean relocatable, | |
2351 | asymbol **symbols) | |
2352 | { | |
2353 | Elf_Internal_Shdr *symtab_hdr; | |
2354 | asection *input_section = link_order->u.indirect.section; | |
2355 | bfd *input_bfd = input_section->owner; | |
2356 | asection **sections = NULL; | |
2357 | Elf_Internal_Rela *internal_relocs = NULL; | |
2358 | Elf_Internal_Sym *isymbuf = NULL; | |
2359 | ||
2360 | /* We only need to handle the case of relaxing, or of having a | |
2361 | particular set of section contents, specially. */ | |
2362 | if (relocatable | |
2363 | || elf_section_data (input_section)->this_hdr.contents == NULL) | |
2364 | return bfd_generic_get_relocated_section_contents (output_bfd, link_info, | |
2365 | link_order, data, | |
2366 | relocatable, | |
2367 | symbols); | |
2368 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
2369 | ||
2370 | memcpy (data, elf_section_data (input_section)->this_hdr.contents, | |
2371 | (size_t) input_section->size); | |
2372 | ||
2373 | if ((input_section->flags & SEC_RELOC) != 0 | |
2374 | && input_section->reloc_count > 0) | |
2375 | { | |
2376 | asection **secpp; | |
2377 | Elf_Internal_Sym *isym, *isymend; | |
2378 | bfd_size_type amt; | |
2379 | ||
2380 | internal_relocs = (_bfd_elf_link_read_relocs | |
4cdc7696 | 2381 | (input_bfd, input_section, NULL, NULL, FALSE)); |
df406460 NC |
2382 | if (internal_relocs == NULL) |
2383 | goto error_return; | |
2384 | ||
2385 | if (symtab_hdr->sh_info != 0) | |
2386 | { | |
2387 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
2388 | if (isymbuf == NULL) | |
2389 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, | |
2390 | symtab_hdr->sh_info, 0, | |
2391 | NULL, NULL, NULL); | |
2392 | if (isymbuf == NULL) | |
2393 | goto error_return; | |
2394 | } | |
2395 | ||
2396 | amt = symtab_hdr->sh_info; | |
2397 | amt *= sizeof (asection *); | |
4cdc7696 | 2398 | sections = bfd_malloc (amt); |
df406460 NC |
2399 | if (sections == NULL && amt != 0) |
2400 | goto error_return; | |
2401 | ||
2402 | isymend = isymbuf + symtab_hdr->sh_info; | |
2403 | for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp) | |
2404 | { | |
2405 | asection *isec; | |
2406 | ||
2407 | if (isym->st_shndx == SHN_UNDEF) | |
2408 | isec = bfd_und_section_ptr; | |
2409 | else if (isym->st_shndx == SHN_ABS) | |
2410 | isec = bfd_abs_section_ptr; | |
2411 | else if (isym->st_shndx == SHN_COMMON) | |
2412 | isec = bfd_com_section_ptr; | |
2413 | else | |
2414 | isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx); | |
2415 | ||
2416 | *secpp = isec; | |
2417 | } | |
2418 | ||
2419 | if (! elf32_avr_relocate_section (output_bfd, link_info, input_bfd, | |
2420 | input_section, data, internal_relocs, | |
2421 | isymbuf, sections)) | |
2422 | goto error_return; | |
2423 | ||
2424 | if (sections != NULL) | |
2425 | free (sections); | |
2426 | if (isymbuf != NULL | |
2427 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
2428 | free (isymbuf); | |
2429 | if (elf_section_data (input_section)->relocs != internal_relocs) | |
2430 | free (internal_relocs); | |
2431 | } | |
2432 | ||
2433 | return data; | |
2434 | ||
2435 | error_return: | |
2436 | if (sections != NULL) | |
2437 | free (sections); | |
2438 | if (isymbuf != NULL | |
2439 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
2440 | free (isymbuf); | |
2441 | if (internal_relocs != NULL | |
2442 | && elf_section_data (input_section)->relocs != internal_relocs) | |
2443 | free (internal_relocs); | |
2444 | return NULL; | |
2445 | } | |
2446 | ||
2447 | ||
28c9d252 NC |
2448 | /* Determines the hash entry name for a particular reloc. It consists of |
2449 | the identifier of the symbol section and the added reloc addend and | |
2450 | symbol offset relative to the section the symbol is attached to. */ | |
2451 | ||
2452 | static char * | |
2453 | avr_stub_name (const asection *symbol_section, | |
2454 | const bfd_vma symbol_offset, | |
2455 | const Elf_Internal_Rela *rela) | |
2456 | { | |
2457 | char *stub_name; | |
2458 | bfd_size_type len; | |
2459 | ||
2460 | len = 8 + 1 + 8 + 1 + 1; | |
2461 | stub_name = bfd_malloc (len); | |
2462 | ||
2463 | sprintf (stub_name, "%08x+%08x", | |
2464 | symbol_section->id & 0xffffffff, | |
2465 | (unsigned int) ((rela->r_addend & 0xffffffff) + symbol_offset)); | |
2466 | ||
2467 | return stub_name; | |
2468 | } | |
2469 | ||
2470 | ||
2471 | /* Add a new stub entry to the stub hash. Not all fields of the new | |
2472 | stub entry are initialised. */ | |
2473 | ||
2474 | static struct elf32_avr_stub_hash_entry * | |
2475 | avr_add_stub (const char *stub_name, | |
2476 | struct elf32_avr_link_hash_table *htab) | |
2477 | { | |
2478 | struct elf32_avr_stub_hash_entry *hsh; | |
2479 | ||
2480 | /* Enter this entry into the linker stub hash table. */ | |
2481 | hsh = avr_stub_hash_lookup (&htab->bstab, stub_name, TRUE, FALSE); | |
2482 | ||
2483 | if (hsh == NULL) | |
2484 | { | |
2485 | (*_bfd_error_handler) (_("%B: cannot create stub entry %s"), | |
2486 | NULL, stub_name); | |
2487 | return NULL; | |
2488 | } | |
2489 | ||
2490 | hsh->stub_offset = 0; | |
2491 | return hsh; | |
2492 | } | |
2493 | ||
2494 | /* We assume that there is already space allocated for the stub section | |
2495 | contents and that before building the stubs the section size is | |
2496 | initialized to 0. We assume that within the stub hash table entry, | |
2497 | the absolute position of the jmp target has been written in the | |
2498 | target_value field. We write here the offset of the generated jmp insn | |
2499 | relative to the trampoline section start to the stub_offset entry in | |
2500 | the stub hash table entry. */ | |
2501 | ||
2502 | static bfd_boolean | |
2503 | avr_build_one_stub (struct bfd_hash_entry *bh, void *in_arg) | |
2504 | { | |
2505 | struct elf32_avr_stub_hash_entry *hsh; | |
2506 | struct bfd_link_info *info; | |
2507 | struct elf32_avr_link_hash_table *htab; | |
2508 | bfd *stub_bfd; | |
2509 | bfd_byte *loc; | |
2510 | bfd_vma target; | |
2511 | bfd_vma starget; | |
2512 | ||
2513 | /* Basic opcode */ | |
2514 | bfd_vma jmp_insn = 0x0000940c; | |
2515 | ||
2516 | /* Massage our args to the form they really have. */ | |
2517 | hsh = avr_stub_hash_entry (bh); | |
2518 | ||
2519 | if (!hsh->is_actually_needed) | |
2520 | return TRUE; | |
2521 | ||
2522 | info = (struct bfd_link_info *) in_arg; | |
2523 | ||
2524 | htab = avr_link_hash_table (info); | |
64ee10b6 NC |
2525 | if (htab == NULL) |
2526 | return FALSE; | |
28c9d252 NC |
2527 | |
2528 | target = hsh->target_value; | |
2529 | ||
2530 | /* Make a note of the offset within the stubs for this entry. */ | |
2531 | hsh->stub_offset = htab->stub_sec->size; | |
2532 | loc = htab->stub_sec->contents + hsh->stub_offset; | |
2533 | ||
2534 | stub_bfd = htab->stub_sec->owner; | |
2535 | ||
2536 | if (debug_stubs) | |
2537 | printf ("Building one Stub. Address: 0x%x, Offset: 0x%x\n", | |
2538 | (unsigned int) target, | |
2539 | (unsigned int) hsh->stub_offset); | |
2540 | ||
2541 | /* We now have to add the information on the jump target to the bare | |
2542 | opcode bits already set in jmp_insn. */ | |
2543 | ||
2544 | /* Check for the alignment of the address. */ | |
2545 | if (target & 1) | |
2546 | return FALSE; | |
2547 | ||
2548 | starget = target >> 1; | |
2549 | jmp_insn |= ((starget & 0x10000) | ((starget << 3) & 0x1f00000)) >> 16; | |
2550 | bfd_put_16 (stub_bfd, jmp_insn, loc); | |
2551 | bfd_put_16 (stub_bfd, (bfd_vma) starget & 0xffff, loc + 2); | |
2552 | ||
2553 | htab->stub_sec->size += 4; | |
2554 | ||
2555 | /* Now add the entries in the address mapping table if there is still | |
2556 | space left. */ | |
2557 | { | |
2558 | unsigned int nr; | |
2559 | ||
2560 | nr = htab->amt_entry_cnt + 1; | |
2561 | if (nr <= htab->amt_max_entry_cnt) | |
2562 | { | |
2563 | htab->amt_entry_cnt = nr; | |
2564 | ||
2565 | htab->amt_stub_offsets[nr - 1] = hsh->stub_offset; | |
2566 | htab->amt_destination_addr[nr - 1] = target; | |
2567 | } | |
2568 | } | |
2569 | ||
2570 | return TRUE; | |
2571 | } | |
2572 | ||
2573 | static bfd_boolean | |
2574 | avr_mark_stub_not_to_be_necessary (struct bfd_hash_entry *bh, | |
c7e2358a | 2575 | void *in_arg ATTRIBUTE_UNUSED) |
28c9d252 NC |
2576 | { |
2577 | struct elf32_avr_stub_hash_entry *hsh; | |
28c9d252 | 2578 | |
28c9d252 NC |
2579 | hsh = avr_stub_hash_entry (bh); |
2580 | hsh->is_actually_needed = FALSE; | |
2581 | ||
2582 | return TRUE; | |
2583 | } | |
2584 | ||
2585 | static bfd_boolean | |
2586 | avr_size_one_stub (struct bfd_hash_entry *bh, void *in_arg) | |
2587 | { | |
2588 | struct elf32_avr_stub_hash_entry *hsh; | |
2589 | struct elf32_avr_link_hash_table *htab; | |
2590 | int size; | |
2591 | ||
2592 | /* Massage our args to the form they really have. */ | |
2593 | hsh = avr_stub_hash_entry (bh); | |
2594 | htab = in_arg; | |
2595 | ||
2596 | if (hsh->is_actually_needed) | |
2597 | size = 4; | |
2598 | else | |
2599 | size = 0; | |
2600 | ||
2601 | htab->stub_sec->size += size; | |
2602 | return TRUE; | |
2603 | } | |
2604 | ||
2605 | void | |
2606 | elf32_avr_setup_params (struct bfd_link_info *info, | |
2607 | bfd *avr_stub_bfd, | |
2608 | asection *avr_stub_section, | |
2609 | bfd_boolean no_stubs, | |
2610 | bfd_boolean deb_stubs, | |
2611 | bfd_boolean deb_relax, | |
2612 | bfd_vma pc_wrap_around, | |
2613 | bfd_boolean call_ret_replacement) | |
2614 | { | |
64ee10b6 | 2615 | struct elf32_avr_link_hash_table *htab = avr_link_hash_table (info); |
28c9d252 | 2616 | |
64ee10b6 NC |
2617 | if (htab == NULL) |
2618 | return; | |
28c9d252 NC |
2619 | htab->stub_sec = avr_stub_section; |
2620 | htab->stub_bfd = avr_stub_bfd; | |
2621 | htab->no_stubs = no_stubs; | |
2622 | ||
2623 | debug_relax = deb_relax; | |
2624 | debug_stubs = deb_stubs; | |
2625 | avr_pc_wrap_around = pc_wrap_around; | |
2626 | avr_replace_call_ret_sequences = call_ret_replacement; | |
2627 | } | |
2628 | ||
2629 | ||
2630 | /* Set up various things so that we can make a list of input sections | |
2631 | for each output section included in the link. Returns -1 on error, | |
2632 | 0 when no stubs will be needed, and 1 on success. It also sets | |
2633 | information on the stubs bfd and the stub section in the info | |
2634 | struct. */ | |
2635 | ||
2636 | int | |
2637 | elf32_avr_setup_section_lists (bfd *output_bfd, | |
2638 | struct bfd_link_info *info) | |
2639 | { | |
2640 | bfd *input_bfd; | |
2641 | unsigned int bfd_count; | |
2642 | int top_id, top_index; | |
2643 | asection *section; | |
2644 | asection **input_list, **list; | |
2645 | bfd_size_type amt; | |
4dfe6ac6 | 2646 | struct elf32_avr_link_hash_table *htab = avr_link_hash_table (info); |
28c9d252 | 2647 | |
64ee10b6 | 2648 | if (htab == NULL || htab->no_stubs) |
28c9d252 NC |
2649 | return 0; |
2650 | ||
2651 | /* Count the number of input BFDs and find the top input section id. */ | |
2652 | for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; | |
2653 | input_bfd != NULL; | |
2654 | input_bfd = input_bfd->link_next) | |
2655 | { | |
2656 | bfd_count += 1; | |
2657 | for (section = input_bfd->sections; | |
2658 | section != NULL; | |
2659 | section = section->next) | |
2660 | if (top_id < section->id) | |
2661 | top_id = section->id; | |
2662 | } | |
2663 | ||
2664 | htab->bfd_count = bfd_count; | |
2665 | ||
2666 | /* We can't use output_bfd->section_count here to find the top output | |
2667 | section index as some sections may have been removed, and | |
2668 | strip_excluded_output_sections doesn't renumber the indices. */ | |
2669 | for (section = output_bfd->sections, top_index = 0; | |
2670 | section != NULL; | |
2671 | section = section->next) | |
2672 | if (top_index < section->index) | |
2673 | top_index = section->index; | |
2674 | ||
2675 | htab->top_index = top_index; | |
2676 | amt = sizeof (asection *) * (top_index + 1); | |
2677 | input_list = bfd_malloc (amt); | |
2678 | htab->input_list = input_list; | |
2679 | if (input_list == NULL) | |
2680 | return -1; | |
2681 | ||
2682 | /* For sections we aren't interested in, mark their entries with a | |
2683 | value we can check later. */ | |
2684 | list = input_list + top_index; | |
2685 | do | |
2686 | *list = bfd_abs_section_ptr; | |
2687 | while (list-- != input_list); | |
2688 | ||
2689 | for (section = output_bfd->sections; | |
2690 | section != NULL; | |
2691 | section = section->next) | |
2692 | if ((section->flags & SEC_CODE) != 0) | |
2693 | input_list[section->index] = NULL; | |
2694 | ||
2695 | return 1; | |
2696 | } | |
2697 | ||
2698 | ||
2699 | /* Read in all local syms for all input bfds, and create hash entries | |
2700 | for export stubs if we are building a multi-subspace shared lib. | |
2701 | Returns -1 on error, 0 otherwise. */ | |
2702 | ||
2703 | static int | |
2704 | get_local_syms (bfd *input_bfd, struct bfd_link_info *info) | |
2705 | { | |
2706 | unsigned int bfd_indx; | |
2707 | Elf_Internal_Sym *local_syms, **all_local_syms; | |
2708 | struct elf32_avr_link_hash_table *htab = avr_link_hash_table (info); | |
9a008db3 | 2709 | bfd_size_type amt; |
28c9d252 | 2710 | |
64ee10b6 NC |
2711 | if (htab == NULL) |
2712 | return -1; | |
2713 | ||
28c9d252 NC |
2714 | /* We want to read in symbol extension records only once. To do this |
2715 | we need to read in the local symbols in parallel and save them for | |
2716 | later use; so hold pointers to the local symbols in an array. */ | |
9a008db3 | 2717 | amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count; |
28c9d252 NC |
2718 | all_local_syms = bfd_zmalloc (amt); |
2719 | htab->all_local_syms = all_local_syms; | |
2720 | if (all_local_syms == NULL) | |
2721 | return -1; | |
2722 | ||
2723 | /* Walk over all the input BFDs, swapping in local symbols. | |
2724 | If we are creating a shared library, create hash entries for the | |
2725 | export stubs. */ | |
2726 | for (bfd_indx = 0; | |
2727 | input_bfd != NULL; | |
2728 | input_bfd = input_bfd->link_next, bfd_indx++) | |
2729 | { | |
2730 | Elf_Internal_Shdr *symtab_hdr; | |
2731 | ||
2732 | /* We'll need the symbol table in a second. */ | |
2733 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
2734 | if (symtab_hdr->sh_info == 0) | |
2735 | continue; | |
2736 | ||
2737 | /* We need an array of the local symbols attached to the input bfd. */ | |
2738 | local_syms = (Elf_Internal_Sym *) symtab_hdr->contents; | |
2739 | if (local_syms == NULL) | |
2740 | { | |
2741 | local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, | |
2742 | symtab_hdr->sh_info, 0, | |
2743 | NULL, NULL, NULL); | |
2744 | /* Cache them for elf_link_input_bfd. */ | |
2745 | symtab_hdr->contents = (unsigned char *) local_syms; | |
2746 | } | |
2747 | if (local_syms == NULL) | |
2748 | return -1; | |
2749 | ||
2750 | all_local_syms[bfd_indx] = local_syms; | |
2751 | } | |
2752 | ||
2753 | return 0; | |
2754 | } | |
2755 | ||
2756 | #define ADD_DUMMY_STUBS_FOR_DEBUGGING 0 | |
2757 | ||
2758 | bfd_boolean | |
2759 | elf32_avr_size_stubs (bfd *output_bfd, | |
2760 | struct bfd_link_info *info, | |
2761 | bfd_boolean is_prealloc_run) | |
2762 | { | |
64ee10b6 NC |
2763 | struct elf32_avr_link_hash_table *htab; |
2764 | int stub_changed = 0; | |
28c9d252 | 2765 | |
64ee10b6 NC |
2766 | htab = avr_link_hash_table (info); |
2767 | if (htab == NULL) | |
2768 | return FALSE; | |
28c9d252 | 2769 | |
64ee10b6 NC |
2770 | /* At this point we initialize htab->vector_base |
2771 | To the start of the text output section. */ | |
2772 | htab->vector_base = htab->stub_sec->output_section->vma; | |
28c9d252 | 2773 | |
64ee10b6 NC |
2774 | if (get_local_syms (info->input_bfds, info)) |
2775 | { | |
2776 | if (htab->all_local_syms) | |
2777 | goto error_ret_free_local; | |
2778 | return FALSE; | |
2779 | } | |
28c9d252 NC |
2780 | |
2781 | if (ADD_DUMMY_STUBS_FOR_DEBUGGING) | |
2782 | { | |
2783 | struct elf32_avr_stub_hash_entry *test; | |
2784 | ||
2785 | test = avr_add_stub ("Hugo",htab); | |
2786 | test->target_value = 0x123456; | |
2787 | test->stub_offset = 13; | |
2788 | ||
2789 | test = avr_add_stub ("Hugo2",htab); | |
2790 | test->target_value = 0x84210; | |
2791 | test->stub_offset = 14; | |
2792 | } | |
2793 | ||
2794 | while (1) | |
2795 | { | |
2796 | bfd *input_bfd; | |
2797 | unsigned int bfd_indx; | |
2798 | ||
2799 | /* We will have to re-generate the stub hash table each time anything | |
2800 | in memory has changed. */ | |
2801 | ||
2802 | bfd_hash_traverse (&htab->bstab, avr_mark_stub_not_to_be_necessary, htab); | |
2803 | for (input_bfd = info->input_bfds, bfd_indx = 0; | |
2804 | input_bfd != NULL; | |
2805 | input_bfd = input_bfd->link_next, bfd_indx++) | |
2806 | { | |
2807 | Elf_Internal_Shdr *symtab_hdr; | |
2808 | asection *section; | |
2809 | Elf_Internal_Sym *local_syms; | |
2810 | ||
2811 | /* We'll need the symbol table in a second. */ | |
2812 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
2813 | if (symtab_hdr->sh_info == 0) | |
2814 | continue; | |
2815 | ||
2816 | local_syms = htab->all_local_syms[bfd_indx]; | |
2817 | ||
2818 | /* Walk over each section attached to the input bfd. */ | |
2819 | for (section = input_bfd->sections; | |
2820 | section != NULL; | |
2821 | section = section->next) | |
2822 | { | |
2823 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; | |
2824 | ||
2825 | /* If there aren't any relocs, then there's nothing more | |
2826 | to do. */ | |
2827 | if ((section->flags & SEC_RELOC) == 0 | |
2828 | || section->reloc_count == 0) | |
2829 | continue; | |
2830 | ||
2831 | /* If this section is a link-once section that will be | |
2832 | discarded, then don't create any stubs. */ | |
2833 | if (section->output_section == NULL | |
2834 | || section->output_section->owner != output_bfd) | |
2835 | continue; | |
2836 | ||
2837 | /* Get the relocs. */ | |
2838 | internal_relocs | |
2839 | = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL, | |
2840 | info->keep_memory); | |
2841 | if (internal_relocs == NULL) | |
2842 | goto error_ret_free_local; | |
2843 | ||
2844 | /* Now examine each relocation. */ | |
2845 | irela = internal_relocs; | |
2846 | irelaend = irela + section->reloc_count; | |
2847 | for (; irela < irelaend; irela++) | |
2848 | { | |
2849 | unsigned int r_type, r_indx; | |
2850 | struct elf32_avr_stub_hash_entry *hsh; | |
2851 | asection *sym_sec; | |
2852 | bfd_vma sym_value; | |
2853 | bfd_vma destination; | |
2854 | struct elf_link_hash_entry *hh; | |
2855 | char *stub_name; | |
2856 | ||
2857 | r_type = ELF32_R_TYPE (irela->r_info); | |
2858 | r_indx = ELF32_R_SYM (irela->r_info); | |
2859 | ||
2860 | /* Only look for 16 bit GS relocs. No other reloc will need a | |
2861 | stub. */ | |
2862 | if (!((r_type == R_AVR_16_PM) | |
2863 | || (r_type == R_AVR_LO8_LDI_GS) | |
2864 | || (r_type == R_AVR_HI8_LDI_GS))) | |
2865 | continue; | |
2866 | ||
2867 | /* Now determine the call target, its name, value, | |
2868 | section. */ | |
2869 | sym_sec = NULL; | |
2870 | sym_value = 0; | |
2871 | destination = 0; | |
2872 | hh = NULL; | |
2873 | if (r_indx < symtab_hdr->sh_info) | |
2874 | { | |
2875 | /* It's a local symbol. */ | |
2876 | Elf_Internal_Sym *sym; | |
2877 | Elf_Internal_Shdr *hdr; | |
4fbb74a6 | 2878 | unsigned int shndx; |
28c9d252 NC |
2879 | |
2880 | sym = local_syms + r_indx; | |
28c9d252 NC |
2881 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) |
2882 | sym_value = sym->st_value; | |
4fbb74a6 AM |
2883 | shndx = sym->st_shndx; |
2884 | if (shndx < elf_numsections (input_bfd)) | |
2885 | { | |
2886 | hdr = elf_elfsections (input_bfd)[shndx]; | |
2887 | sym_sec = hdr->bfd_section; | |
2888 | destination = (sym_value + irela->r_addend | |
2889 | + sym_sec->output_offset | |
2890 | + sym_sec->output_section->vma); | |
2891 | } | |
28c9d252 NC |
2892 | } |
2893 | else | |
2894 | { | |
2895 | /* It's an external symbol. */ | |
2896 | int e_indx; | |
2897 | ||
2898 | e_indx = r_indx - symtab_hdr->sh_info; | |
2899 | hh = elf_sym_hashes (input_bfd)[e_indx]; | |
2900 | ||
2901 | while (hh->root.type == bfd_link_hash_indirect | |
2902 | || hh->root.type == bfd_link_hash_warning) | |
2903 | hh = (struct elf_link_hash_entry *) | |
2904 | (hh->root.u.i.link); | |
2905 | ||
2906 | if (hh->root.type == bfd_link_hash_defined | |
2907 | || hh->root.type == bfd_link_hash_defweak) | |
2908 | { | |
2909 | sym_sec = hh->root.u.def.section; | |
2910 | sym_value = hh->root.u.def.value; | |
2911 | if (sym_sec->output_section != NULL) | |
2912 | destination = (sym_value + irela->r_addend | |
2913 | + sym_sec->output_offset | |
2914 | + sym_sec->output_section->vma); | |
2915 | } | |
2916 | else if (hh->root.type == bfd_link_hash_undefweak) | |
2917 | { | |
2918 | if (! info->shared) | |
2919 | continue; | |
2920 | } | |
2921 | else if (hh->root.type == bfd_link_hash_undefined) | |
2922 | { | |
2923 | if (! (info->unresolved_syms_in_objects == RM_IGNORE | |
2924 | && (ELF_ST_VISIBILITY (hh->other) | |
2925 | == STV_DEFAULT))) | |
2926 | continue; | |
2927 | } | |
2928 | else | |
2929 | { | |
2930 | bfd_set_error (bfd_error_bad_value); | |
2931 | ||
2932 | error_ret_free_internal: | |
2933 | if (elf_section_data (section)->relocs == NULL) | |
2934 | free (internal_relocs); | |
2935 | goto error_ret_free_local; | |
2936 | } | |
2937 | } | |
2938 | ||
2939 | if (! avr_stub_is_required_for_16_bit_reloc | |
2940 | (destination - htab->vector_base)) | |
2941 | { | |
2942 | if (!is_prealloc_run) | |
2943 | /* We are having a reloc that does't need a stub. */ | |
2944 | continue; | |
2945 | ||
2946 | /* We don't right now know if a stub will be needed. | |
2947 | Let's rather be on the safe side. */ | |
2948 | } | |
2949 | ||
2950 | /* Get the name of this stub. */ | |
2951 | stub_name = avr_stub_name (sym_sec, sym_value, irela); | |
2952 | ||
2953 | if (!stub_name) | |
2954 | goto error_ret_free_internal; | |
2955 | ||
2956 | ||
2957 | hsh = avr_stub_hash_lookup (&htab->bstab, | |
2958 | stub_name, | |
2959 | FALSE, FALSE); | |
2960 | if (hsh != NULL) | |
2961 | { | |
2962 | /* The proper stub has already been created. Mark it | |
2963 | to be used and write the possibly changed destination | |
2964 | value. */ | |
2965 | hsh->is_actually_needed = TRUE; | |
2966 | hsh->target_value = destination; | |
2967 | free (stub_name); | |
2968 | continue; | |
2969 | } | |
2970 | ||
2971 | hsh = avr_add_stub (stub_name, htab); | |
2972 | if (hsh == NULL) | |
2973 | { | |
2974 | free (stub_name); | |
2975 | goto error_ret_free_internal; | |
2976 | } | |
2977 | ||
2978 | hsh->is_actually_needed = TRUE; | |
2979 | hsh->target_value = destination; | |
2980 | ||
2981 | if (debug_stubs) | |
2982 | printf ("Adding stub with destination 0x%x to the" | |
2983 | " hash table.\n", (unsigned int) destination); | |
2984 | if (debug_stubs) | |
2985 | printf ("(Pre-Alloc run: %i)\n", is_prealloc_run); | |
2986 | ||
2987 | stub_changed = TRUE; | |
2988 | } | |
2989 | ||
2990 | /* We're done with the internal relocs, free them. */ | |
2991 | if (elf_section_data (section)->relocs == NULL) | |
2992 | free (internal_relocs); | |
2993 | } | |
2994 | } | |
2995 | ||
2996 | /* Re-Calculate the number of needed stubs. */ | |
2997 | htab->stub_sec->size = 0; | |
2998 | bfd_hash_traverse (&htab->bstab, avr_size_one_stub, htab); | |
2999 | ||
3000 | if (!stub_changed) | |
3001 | break; | |
3002 | ||
3003 | stub_changed = FALSE; | |
3004 | } | |
3005 | ||
3006 | free (htab->all_local_syms); | |
3007 | return TRUE; | |
3008 | ||
3009 | error_ret_free_local: | |
3010 | free (htab->all_local_syms); | |
3011 | return FALSE; | |
3012 | } | |
3013 | ||
3014 | ||
3015 | /* Build all the stubs associated with the current output file. The | |
3016 | stubs are kept in a hash table attached to the main linker hash | |
3017 | table. We also set up the .plt entries for statically linked PIC | |
3018 | functions here. This function is called via hppaelf_finish in the | |
3019 | linker. */ | |
3020 | ||
3021 | bfd_boolean | |
3022 | elf32_avr_build_stubs (struct bfd_link_info *info) | |
3023 | { | |
3024 | asection *stub_sec; | |
3025 | struct bfd_hash_table *table; | |
3026 | struct elf32_avr_link_hash_table *htab; | |
3027 | bfd_size_type total_size = 0; | |
3028 | ||
3029 | htab = avr_link_hash_table (info); | |
64ee10b6 NC |
3030 | if (htab == NULL) |
3031 | return FALSE; | |
28c9d252 NC |
3032 | |
3033 | /* In case that there were several stub sections: */ | |
3034 | for (stub_sec = htab->stub_bfd->sections; | |
3035 | stub_sec != NULL; | |
3036 | stub_sec = stub_sec->next) | |
3037 | { | |
3038 | bfd_size_type size; | |
3039 | ||
3040 | /* Allocate memory to hold the linker stubs. */ | |
3041 | size = stub_sec->size; | |
3042 | total_size += size; | |
3043 | ||
3044 | stub_sec->contents = bfd_zalloc (htab->stub_bfd, size); | |
3045 | if (stub_sec->contents == NULL && size != 0) | |
3046 | return FALSE; | |
3047 | stub_sec->size = 0; | |
3048 | } | |
3049 | ||
3050 | /* Allocate memory for the adress mapping table. */ | |
3051 | htab->amt_entry_cnt = 0; | |
3052 | htab->amt_max_entry_cnt = total_size / 4; | |
3053 | htab->amt_stub_offsets = bfd_malloc (sizeof (bfd_vma) | |
3054 | * htab->amt_max_entry_cnt); | |
3055 | htab->amt_destination_addr = bfd_malloc (sizeof (bfd_vma) | |
3056 | * htab->amt_max_entry_cnt ); | |
3057 | ||
3058 | if (debug_stubs) | |
3059 | printf ("Allocating %i entries in the AMT\n", htab->amt_max_entry_cnt); | |
3060 | ||
3061 | /* Build the stubs as directed by the stub hash table. */ | |
3062 | table = &htab->bstab; | |
3063 | bfd_hash_traverse (table, avr_build_one_stub, info); | |
3064 | ||
3065 | if (debug_stubs) | |
3066 | printf ("Final Stub section Size: %i\n", (int) htab->stub_sec->size); | |
3067 | ||
3068 | return TRUE; | |
3069 | } | |
3070 | ||
adde6300 | 3071 | #define ELF_ARCH bfd_arch_avr |
ae95ffa6 | 3072 | #define ELF_TARGET_ID AVR_ELF_DATA |
adde6300 | 3073 | #define ELF_MACHINE_CODE EM_AVR |
aa4f99bb | 3074 | #define ELF_MACHINE_ALT1 EM_AVR_OLD |
adde6300 AM |
3075 | #define ELF_MAXPAGESIZE 1 |
3076 | ||
3077 | #define TARGET_LITTLE_SYM bfd_elf32_avr_vec | |
3078 | #define TARGET_LITTLE_NAME "elf32-avr" | |
3079 | ||
28c9d252 NC |
3080 | #define bfd_elf32_bfd_link_hash_table_create elf32_avr_link_hash_table_create |
3081 | #define bfd_elf32_bfd_link_hash_table_free elf32_avr_link_hash_table_free | |
3082 | ||
adde6300 AM |
3083 | #define elf_info_to_howto avr_info_to_howto_rela |
3084 | #define elf_info_to_howto_rel NULL | |
3085 | #define elf_backend_relocate_section elf32_avr_relocate_section | |
adde6300 | 3086 | #define elf_backend_can_gc_sections 1 |
f0fe0e16 | 3087 | #define elf_backend_rela_normal 1 |
adde6300 AM |
3088 | #define elf_backend_final_write_processing \ |
3089 | bfd_elf_avr_final_write_processing | |
3090 | #define elf_backend_object_p elf32_avr_object_p | |
3091 | ||
df406460 NC |
3092 | #define bfd_elf32_bfd_relax_section elf32_avr_relax_section |
3093 | #define bfd_elf32_bfd_get_relocated_section_contents \ | |
3094 | elf32_avr_get_relocated_section_contents | |
3095 | ||
adde6300 | 3096 | #include "elf32-target.h" |