Commit | Line | Data |
---|---|---|
adde6300 | 1 | /* AVR-specific support for 32-bit ELF |
4dfe6ac6 NC |
2 | Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, |
3 | 2010 Free Software Foundation, Inc. | |
adde6300 AM |
4 | Contributed by Denis Chertykov <denisc@overta.ru> |
5 | ||
750bce0e | 6 | This file is part of BFD, the Binary File Descriptor library. |
adde6300 | 7 | |
750bce0e NC |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 10 | the Free Software Foundation; either version 3 of the License, or |
750bce0e | 11 | (at your option) any later version. |
adde6300 | 12 | |
750bce0e NC |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
adde6300 | 17 | |
750bce0e NC |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software | |
4cdc7696 | 20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, |
df406460 | 21 | Boston, MA 02110-1301, USA. */ |
adde6300 | 22 | |
adde6300 | 23 | #include "sysdep.h" |
3db64b00 | 24 | #include "bfd.h" |
adde6300 AM |
25 | #include "libbfd.h" |
26 | #include "elf-bfd.h" | |
27 | #include "elf/avr.h" | |
28c9d252 NC |
28 | #include "elf32-avr.h" |
29 | ||
30 | /* Enable debugging printout at stdout with this variable. */ | |
31 | static bfd_boolean debug_relax = FALSE; | |
32 | ||
33 | /* Enable debugging printout at stdout with this variable. */ | |
34 | static bfd_boolean debug_stubs = FALSE; | |
35 | ||
36 | /* Hash table initialization and handling. Code is taken from the hppa port | |
37 | and adapted to the needs of AVR. */ | |
38 | ||
39 | /* We use two hash tables to hold information for linking avr objects. | |
40 | ||
4dfe6ac6 | 41 | The first is the elf32_avr_link_hash_table which is derived from the |
28c9d252 NC |
42 | stanard ELF linker hash table. We use this as a place to attach the other |
43 | hash table and some static information. | |
44 | ||
45 | The second is the stub hash table which is derived from the base BFD | |
46 | hash table. The stub hash table holds the information on the linker | |
47 | stubs. */ | |
48 | ||
49 | struct elf32_avr_stub_hash_entry | |
50 | { | |
51 | /* Base hash table entry structure. */ | |
52 | struct bfd_hash_entry bh_root; | |
53 | ||
54 | /* Offset within stub_sec of the beginning of this stub. */ | |
55 | bfd_vma stub_offset; | |
56 | ||
57 | /* Given the symbol's value and its section we can determine its final | |
58 | value when building the stubs (so the stub knows where to jump). */ | |
59 | bfd_vma target_value; | |
60 | ||
61 | /* This way we could mark stubs to be no longer necessary. */ | |
62 | bfd_boolean is_actually_needed; | |
63 | }; | |
64 | ||
65 | struct elf32_avr_link_hash_table | |
66 | { | |
67 | /* The main hash table. */ | |
68 | struct elf_link_hash_table etab; | |
69 | ||
70 | /* The stub hash table. */ | |
71 | struct bfd_hash_table bstab; | |
72 | ||
73 | bfd_boolean no_stubs; | |
74 | ||
75 | /* Linker stub bfd. */ | |
76 | bfd *stub_bfd; | |
77 | ||
78 | /* The stub section. */ | |
79 | asection *stub_sec; | |
80 | ||
81 | /* Usually 0, unless we are generating code for a bootloader. Will | |
82 | be initialized by elf32_avr_size_stubs to the vma offset of the | |
83 | output section associated with the stub section. */ | |
84 | bfd_vma vector_base; | |
85 | ||
86 | /* Assorted information used by elf32_avr_size_stubs. */ | |
87 | unsigned int bfd_count; | |
88 | int top_index; | |
89 | asection ** input_list; | |
90 | Elf_Internal_Sym ** all_local_syms; | |
91 | ||
92 | /* Tables for mapping vma beyond the 128k boundary to the address of the | |
93 | corresponding stub. (AMT) | |
94 | "amt_max_entry_cnt" reflects the number of entries that memory is allocated | |
95 | for in the "amt_stub_offsets" and "amt_destination_addr" arrays. | |
96 | "amt_entry_cnt" informs how many of these entries actually contain | |
97 | useful data. */ | |
98 | unsigned int amt_entry_cnt; | |
99 | unsigned int amt_max_entry_cnt; | |
100 | bfd_vma * amt_stub_offsets; | |
101 | bfd_vma * amt_destination_addr; | |
102 | }; | |
103 | ||
104 | /* Various hash macros and functions. */ | |
105 | #define avr_link_hash_table(p) \ | |
64ee10b6 | 106 | /* PR 3874: Check that we have an AVR style hash table before using it. */\ |
4dfe6ac6 NC |
107 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
108 | == AVR_ELF_DATA ? ((struct elf32_avr_link_hash_table *) ((p)->hash)) : NULL) | |
28c9d252 NC |
109 | |
110 | #define avr_stub_hash_entry(ent) \ | |
111 | ((struct elf32_avr_stub_hash_entry *)(ent)) | |
112 | ||
113 | #define avr_stub_hash_lookup(table, string, create, copy) \ | |
114 | ((struct elf32_avr_stub_hash_entry *) \ | |
115 | bfd_hash_lookup ((table), (string), (create), (copy))) | |
adde6300 | 116 | |
adde6300 AM |
117 | static reloc_howto_type elf_avr_howto_table[] = |
118 | { | |
119 | HOWTO (R_AVR_NONE, /* type */ | |
120 | 0, /* rightshift */ | |
121 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
122 | 32, /* bitsize */ | |
b34976b6 | 123 | FALSE, /* pc_relative */ |
adde6300 AM |
124 | 0, /* bitpos */ |
125 | complain_overflow_bitfield, /* complain_on_overflow */ | |
126 | bfd_elf_generic_reloc, /* special_function */ | |
127 | "R_AVR_NONE", /* name */ | |
b34976b6 | 128 | FALSE, /* partial_inplace */ |
adde6300 AM |
129 | 0, /* src_mask */ |
130 | 0, /* dst_mask */ | |
b34976b6 | 131 | FALSE), /* pcrel_offset */ |
adde6300 AM |
132 | |
133 | HOWTO (R_AVR_32, /* type */ | |
134 | 0, /* rightshift */ | |
135 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
136 | 32, /* bitsize */ | |
b34976b6 | 137 | FALSE, /* pc_relative */ |
adde6300 AM |
138 | 0, /* bitpos */ |
139 | complain_overflow_bitfield, /* complain_on_overflow */ | |
140 | bfd_elf_generic_reloc, /* special_function */ | |
141 | "R_AVR_32", /* name */ | |
b34976b6 | 142 | FALSE, /* partial_inplace */ |
adde6300 AM |
143 | 0xffffffff, /* src_mask */ |
144 | 0xffffffff, /* dst_mask */ | |
b34976b6 | 145 | FALSE), /* pcrel_offset */ |
adde6300 AM |
146 | |
147 | /* A 7 bit PC relative relocation. */ | |
148 | HOWTO (R_AVR_7_PCREL, /* type */ | |
149 | 1, /* rightshift */ | |
150 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
151 | 7, /* bitsize */ | |
b34976b6 | 152 | TRUE, /* pc_relative */ |
adde6300 AM |
153 | 3, /* bitpos */ |
154 | complain_overflow_bitfield, /* complain_on_overflow */ | |
155 | bfd_elf_generic_reloc, /* special_function */ | |
156 | "R_AVR_7_PCREL", /* name */ | |
b34976b6 | 157 | FALSE, /* partial_inplace */ |
adde6300 AM |
158 | 0xffff, /* src_mask */ |
159 | 0xffff, /* dst_mask */ | |
b34976b6 | 160 | TRUE), /* pcrel_offset */ |
adde6300 AM |
161 | |
162 | /* A 13 bit PC relative relocation. */ | |
163 | HOWTO (R_AVR_13_PCREL, /* type */ | |
164 | 1, /* rightshift */ | |
165 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
166 | 13, /* bitsize */ | |
b34976b6 | 167 | TRUE, /* pc_relative */ |
adde6300 AM |
168 | 0, /* bitpos */ |
169 | complain_overflow_bitfield, /* complain_on_overflow */ | |
170 | bfd_elf_generic_reloc, /* special_function */ | |
171 | "R_AVR_13_PCREL", /* name */ | |
b34976b6 | 172 | FALSE, /* partial_inplace */ |
adde6300 AM |
173 | 0xfff, /* src_mask */ |
174 | 0xfff, /* dst_mask */ | |
b34976b6 | 175 | TRUE), /* pcrel_offset */ |
adde6300 AM |
176 | |
177 | /* A 16 bit absolute relocation. */ | |
178 | HOWTO (R_AVR_16, /* type */ | |
179 | 0, /* rightshift */ | |
180 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
181 | 16, /* bitsize */ | |
b34976b6 | 182 | FALSE, /* pc_relative */ |
adde6300 AM |
183 | 0, /* bitpos */ |
184 | complain_overflow_dont, /* complain_on_overflow */ | |
185 | bfd_elf_generic_reloc, /* special_function */ | |
186 | "R_AVR_16", /* name */ | |
b34976b6 | 187 | FALSE, /* partial_inplace */ |
adde6300 AM |
188 | 0xffff, /* src_mask */ |
189 | 0xffff, /* dst_mask */ | |
b34976b6 | 190 | FALSE), /* pcrel_offset */ |
adde6300 | 191 | |
28c9d252 NC |
192 | /* A 16 bit absolute relocation for command address |
193 | Will be changed when linker stubs are needed. */ | |
adde6300 AM |
194 | HOWTO (R_AVR_16_PM, /* type */ |
195 | 1, /* rightshift */ | |
196 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
197 | 16, /* bitsize */ | |
b34976b6 | 198 | FALSE, /* pc_relative */ |
adde6300 AM |
199 | 0, /* bitpos */ |
200 | complain_overflow_bitfield, /* complain_on_overflow */ | |
201 | bfd_elf_generic_reloc, /* special_function */ | |
202 | "R_AVR_16_PM", /* name */ | |
b34976b6 | 203 | FALSE, /* partial_inplace */ |
adde6300 AM |
204 | 0xffff, /* src_mask */ |
205 | 0xffff, /* dst_mask */ | |
b34976b6 | 206 | FALSE), /* pcrel_offset */ |
adde6300 AM |
207 | /* A low 8 bit absolute relocation of 16 bit address. |
208 | For LDI command. */ | |
209 | HOWTO (R_AVR_LO8_LDI, /* type */ | |
210 | 0, /* rightshift */ | |
211 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
212 | 8, /* bitsize */ | |
b34976b6 | 213 | FALSE, /* pc_relative */ |
adde6300 AM |
214 | 0, /* bitpos */ |
215 | complain_overflow_dont, /* complain_on_overflow */ | |
216 | bfd_elf_generic_reloc, /* special_function */ | |
217 | "R_AVR_LO8_LDI", /* name */ | |
b34976b6 | 218 | FALSE, /* partial_inplace */ |
adde6300 AM |
219 | 0xffff, /* src_mask */ |
220 | 0xffff, /* dst_mask */ | |
b34976b6 | 221 | FALSE), /* pcrel_offset */ |
adde6300 AM |
222 | /* A high 8 bit absolute relocation of 16 bit address. |
223 | For LDI command. */ | |
224 | HOWTO (R_AVR_HI8_LDI, /* type */ | |
225 | 8, /* rightshift */ | |
226 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
227 | 8, /* bitsize */ | |
b34976b6 | 228 | FALSE, /* pc_relative */ |
adde6300 AM |
229 | 0, /* bitpos */ |
230 | complain_overflow_dont, /* complain_on_overflow */ | |
231 | bfd_elf_generic_reloc, /* special_function */ | |
232 | "R_AVR_HI8_LDI", /* name */ | |
b34976b6 | 233 | FALSE, /* partial_inplace */ |
adde6300 AM |
234 | 0xffff, /* src_mask */ |
235 | 0xffff, /* dst_mask */ | |
b34976b6 | 236 | FALSE), /* pcrel_offset */ |
adde6300 | 237 | /* A high 6 bit absolute relocation of 22 bit address. |
4cdc7696 | 238 | For LDI command. As well second most significant 8 bit value of |
df406460 | 239 | a 32 bit link-time constant. */ |
adde6300 AM |
240 | HOWTO (R_AVR_HH8_LDI, /* type */ |
241 | 16, /* rightshift */ | |
242 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
243 | 8, /* bitsize */ | |
b34976b6 | 244 | FALSE, /* pc_relative */ |
adde6300 AM |
245 | 0, /* bitpos */ |
246 | complain_overflow_dont, /* complain_on_overflow */ | |
247 | bfd_elf_generic_reloc, /* special_function */ | |
248 | "R_AVR_HH8_LDI", /* name */ | |
b34976b6 | 249 | FALSE, /* partial_inplace */ |
adde6300 AM |
250 | 0xffff, /* src_mask */ |
251 | 0xffff, /* dst_mask */ | |
b34976b6 | 252 | FALSE), /* pcrel_offset */ |
adde6300 AM |
253 | /* A negative low 8 bit absolute relocation of 16 bit address. |
254 | For LDI command. */ | |
255 | HOWTO (R_AVR_LO8_LDI_NEG, /* type */ | |
256 | 0, /* rightshift */ | |
257 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
258 | 8, /* bitsize */ | |
b34976b6 | 259 | FALSE, /* pc_relative */ |
adde6300 AM |
260 | 0, /* bitpos */ |
261 | complain_overflow_dont, /* complain_on_overflow */ | |
262 | bfd_elf_generic_reloc, /* special_function */ | |
263 | "R_AVR_LO8_LDI_NEG", /* name */ | |
b34976b6 | 264 | FALSE, /* partial_inplace */ |
adde6300 AM |
265 | 0xffff, /* src_mask */ |
266 | 0xffff, /* dst_mask */ | |
b34976b6 | 267 | FALSE), /* pcrel_offset */ |
df406460 | 268 | /* A negative high 8 bit absolute relocation of 16 bit address. |
adde6300 AM |
269 | For LDI command. */ |
270 | HOWTO (R_AVR_HI8_LDI_NEG, /* type */ | |
271 | 8, /* rightshift */ | |
272 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
273 | 8, /* bitsize */ | |
b34976b6 | 274 | FALSE, /* pc_relative */ |
adde6300 AM |
275 | 0, /* bitpos */ |
276 | complain_overflow_dont, /* complain_on_overflow */ | |
277 | bfd_elf_generic_reloc, /* special_function */ | |
278 | "R_AVR_HI8_LDI_NEG", /* name */ | |
b34976b6 | 279 | FALSE, /* partial_inplace */ |
adde6300 AM |
280 | 0xffff, /* src_mask */ |
281 | 0xffff, /* dst_mask */ | |
b34976b6 | 282 | FALSE), /* pcrel_offset */ |
df406460 | 283 | /* A negative high 6 bit absolute relocation of 22 bit address. |
adde6300 AM |
284 | For LDI command. */ |
285 | HOWTO (R_AVR_HH8_LDI_NEG, /* type */ | |
286 | 16, /* rightshift */ | |
287 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
288 | 8, /* bitsize */ | |
b34976b6 | 289 | FALSE, /* pc_relative */ |
adde6300 AM |
290 | 0, /* bitpos */ |
291 | complain_overflow_dont, /* complain_on_overflow */ | |
292 | bfd_elf_generic_reloc, /* special_function */ | |
293 | "R_AVR_HH8_LDI_NEG", /* name */ | |
b34976b6 | 294 | FALSE, /* partial_inplace */ |
adde6300 AM |
295 | 0xffff, /* src_mask */ |
296 | 0xffff, /* dst_mask */ | |
b34976b6 | 297 | FALSE), /* pcrel_offset */ |
adde6300 | 298 | /* A low 8 bit absolute relocation of 24 bit program memory address. |
28c9d252 | 299 | For LDI command. Will not be changed when linker stubs are needed. */ |
adde6300 AM |
300 | HOWTO (R_AVR_LO8_LDI_PM, /* type */ |
301 | 1, /* rightshift */ | |
302 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
303 | 8, /* bitsize */ | |
b34976b6 | 304 | FALSE, /* pc_relative */ |
adde6300 AM |
305 | 0, /* bitpos */ |
306 | complain_overflow_dont, /* complain_on_overflow */ | |
307 | bfd_elf_generic_reloc, /* special_function */ | |
308 | "R_AVR_LO8_LDI_PM", /* name */ | |
b34976b6 | 309 | FALSE, /* partial_inplace */ |
adde6300 AM |
310 | 0xffff, /* src_mask */ |
311 | 0xffff, /* dst_mask */ | |
b34976b6 | 312 | FALSE), /* pcrel_offset */ |
28c9d252 NC |
313 | /* A low 8 bit absolute relocation of 24 bit program memory address. |
314 | For LDI command. Will not be changed when linker stubs are needed. */ | |
adde6300 AM |
315 | HOWTO (R_AVR_HI8_LDI_PM, /* type */ |
316 | 9, /* rightshift */ | |
317 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
318 | 8, /* bitsize */ | |
b34976b6 | 319 | FALSE, /* pc_relative */ |
adde6300 AM |
320 | 0, /* bitpos */ |
321 | complain_overflow_dont, /* complain_on_overflow */ | |
322 | bfd_elf_generic_reloc, /* special_function */ | |
323 | "R_AVR_HI8_LDI_PM", /* name */ | |
b34976b6 | 324 | FALSE, /* partial_inplace */ |
adde6300 AM |
325 | 0xffff, /* src_mask */ |
326 | 0xffff, /* dst_mask */ | |
b34976b6 | 327 | FALSE), /* pcrel_offset */ |
28c9d252 NC |
328 | /* A low 8 bit absolute relocation of 24 bit program memory address. |
329 | For LDI command. Will not be changed when linker stubs are needed. */ | |
adde6300 AM |
330 | HOWTO (R_AVR_HH8_LDI_PM, /* type */ |
331 | 17, /* rightshift */ | |
332 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
333 | 8, /* bitsize */ | |
b34976b6 | 334 | FALSE, /* pc_relative */ |
adde6300 AM |
335 | 0, /* bitpos */ |
336 | complain_overflow_dont, /* complain_on_overflow */ | |
337 | bfd_elf_generic_reloc, /* special_function */ | |
338 | "R_AVR_HH8_LDI_PM", /* name */ | |
b34976b6 | 339 | FALSE, /* partial_inplace */ |
adde6300 AM |
340 | 0xffff, /* src_mask */ |
341 | 0xffff, /* dst_mask */ | |
b34976b6 | 342 | FALSE), /* pcrel_offset */ |
28c9d252 NC |
343 | /* A low 8 bit absolute relocation of 24 bit program memory address. |
344 | For LDI command. Will not be changed when linker stubs are needed. */ | |
adde6300 AM |
345 | HOWTO (R_AVR_LO8_LDI_PM_NEG, /* type */ |
346 | 1, /* rightshift */ | |
347 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
348 | 8, /* bitsize */ | |
b34976b6 | 349 | FALSE, /* pc_relative */ |
adde6300 AM |
350 | 0, /* bitpos */ |
351 | complain_overflow_dont, /* complain_on_overflow */ | |
352 | bfd_elf_generic_reloc, /* special_function */ | |
353 | "R_AVR_LO8_LDI_PM_NEG", /* name */ | |
b34976b6 | 354 | FALSE, /* partial_inplace */ |
adde6300 AM |
355 | 0xffff, /* src_mask */ |
356 | 0xffff, /* dst_mask */ | |
b34976b6 | 357 | FALSE), /* pcrel_offset */ |
28c9d252 NC |
358 | /* A low 8 bit absolute relocation of 24 bit program memory address. |
359 | For LDI command. Will not be changed when linker stubs are needed. */ | |
adde6300 AM |
360 | HOWTO (R_AVR_HI8_LDI_PM_NEG, /* type */ |
361 | 9, /* rightshift */ | |
362 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
363 | 8, /* bitsize */ | |
b34976b6 | 364 | FALSE, /* pc_relative */ |
adde6300 AM |
365 | 0, /* bitpos */ |
366 | complain_overflow_dont, /* complain_on_overflow */ | |
367 | bfd_elf_generic_reloc, /* special_function */ | |
368 | "R_AVR_HI8_LDI_PM_NEG", /* name */ | |
b34976b6 | 369 | FALSE, /* partial_inplace */ |
adde6300 AM |
370 | 0xffff, /* src_mask */ |
371 | 0xffff, /* dst_mask */ | |
b34976b6 | 372 | FALSE), /* pcrel_offset */ |
28c9d252 NC |
373 | /* A low 8 bit absolute relocation of 24 bit program memory address. |
374 | For LDI command. Will not be changed when linker stubs are needed. */ | |
adde6300 AM |
375 | HOWTO (R_AVR_HH8_LDI_PM_NEG, /* type */ |
376 | 17, /* rightshift */ | |
377 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
378 | 8, /* bitsize */ | |
b34976b6 | 379 | FALSE, /* pc_relative */ |
adde6300 AM |
380 | 0, /* bitpos */ |
381 | complain_overflow_dont, /* complain_on_overflow */ | |
382 | bfd_elf_generic_reloc, /* special_function */ | |
383 | "R_AVR_HH8_LDI_PM_NEG", /* name */ | |
b34976b6 | 384 | FALSE, /* partial_inplace */ |
adde6300 AM |
385 | 0xffff, /* src_mask */ |
386 | 0xffff, /* dst_mask */ | |
b34976b6 | 387 | FALSE), /* pcrel_offset */ |
adde6300 AM |
388 | /* Relocation for CALL command in ATmega. */ |
389 | HOWTO (R_AVR_CALL, /* type */ | |
390 | 1, /* rightshift */ | |
391 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
392 | 23, /* bitsize */ | |
b34976b6 | 393 | FALSE, /* pc_relative */ |
adde6300 | 394 | 0, /* bitpos */ |
750bce0e | 395 | complain_overflow_dont,/* complain_on_overflow */ |
adde6300 AM |
396 | bfd_elf_generic_reloc, /* special_function */ |
397 | "R_AVR_CALL", /* name */ | |
b34976b6 | 398 | FALSE, /* partial_inplace */ |
adde6300 AM |
399 | 0xffffffff, /* src_mask */ |
400 | 0xffffffff, /* dst_mask */ | |
750bce0e NC |
401 | FALSE), /* pcrel_offset */ |
402 | /* A 16 bit absolute relocation of 16 bit address. | |
403 | For LDI command. */ | |
404 | HOWTO (R_AVR_LDI, /* type */ | |
405 | 0, /* rightshift */ | |
406 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
407 | 16, /* bitsize */ | |
408 | FALSE, /* pc_relative */ | |
409 | 0, /* bitpos */ | |
410 | complain_overflow_dont,/* complain_on_overflow */ | |
411 | bfd_elf_generic_reloc, /* special_function */ | |
412 | "R_AVR_LDI", /* name */ | |
413 | FALSE, /* partial_inplace */ | |
414 | 0xffff, /* src_mask */ | |
415 | 0xffff, /* dst_mask */ | |
416 | FALSE), /* pcrel_offset */ | |
417 | /* A 6 bit absolute relocation of 6 bit offset. | |
418 | For ldd/sdd command. */ | |
419 | HOWTO (R_AVR_6, /* type */ | |
420 | 0, /* rightshift */ | |
421 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
422 | 6, /* bitsize */ | |
423 | FALSE, /* pc_relative */ | |
424 | 0, /* bitpos */ | |
425 | complain_overflow_dont,/* complain_on_overflow */ | |
426 | bfd_elf_generic_reloc, /* special_function */ | |
427 | "R_AVR_6", /* name */ | |
428 | FALSE, /* partial_inplace */ | |
429 | 0xffff, /* src_mask */ | |
430 | 0xffff, /* dst_mask */ | |
431 | FALSE), /* pcrel_offset */ | |
432 | /* A 6 bit absolute relocation of 6 bit offset. | |
433 | For sbiw/adiw command. */ | |
434 | HOWTO (R_AVR_6_ADIW, /* type */ | |
435 | 0, /* rightshift */ | |
436 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
437 | 6, /* bitsize */ | |
438 | FALSE, /* pc_relative */ | |
439 | 0, /* bitpos */ | |
440 | complain_overflow_dont,/* complain_on_overflow */ | |
441 | bfd_elf_generic_reloc, /* special_function */ | |
442 | "R_AVR_6_ADIW", /* name */ | |
443 | FALSE, /* partial_inplace */ | |
444 | 0xffff, /* src_mask */ | |
445 | 0xffff, /* dst_mask */ | |
df406460 NC |
446 | FALSE), /* pcrel_offset */ |
447 | /* Most significant 8 bit value of a 32 bit link-time constant. */ | |
448 | HOWTO (R_AVR_MS8_LDI, /* type */ | |
449 | 24, /* rightshift */ | |
450 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
451 | 8, /* bitsize */ | |
452 | FALSE, /* pc_relative */ | |
453 | 0, /* bitpos */ | |
454 | complain_overflow_dont, /* complain_on_overflow */ | |
455 | bfd_elf_generic_reloc, /* special_function */ | |
456 | "R_AVR_MS8_LDI", /* name */ | |
457 | FALSE, /* partial_inplace */ | |
458 | 0xffff, /* src_mask */ | |
459 | 0xffff, /* dst_mask */ | |
460 | FALSE), /* pcrel_offset */ | |
461 | /* Negative most significant 8 bit value of a 32 bit link-time constant. */ | |
462 | HOWTO (R_AVR_MS8_LDI_NEG, /* type */ | |
463 | 24, /* rightshift */ | |
464 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
465 | 8, /* bitsize */ | |
466 | FALSE, /* pc_relative */ | |
467 | 0, /* bitpos */ | |
468 | complain_overflow_dont, /* complain_on_overflow */ | |
469 | bfd_elf_generic_reloc, /* special_function */ | |
470 | "R_AVR_MS8_LDI_NEG", /* name */ | |
471 | FALSE, /* partial_inplace */ | |
472 | 0xffff, /* src_mask */ | |
473 | 0xffff, /* dst_mask */ | |
28c9d252 NC |
474 | FALSE), /* pcrel_offset */ |
475 | /* A low 8 bit absolute relocation of 24 bit program memory address. | |
17e57237 | 476 | For LDI command. Will be changed when linker stubs are needed. */ |
28c9d252 NC |
477 | HOWTO (R_AVR_LO8_LDI_GS, /* type */ |
478 | 1, /* rightshift */ | |
479 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
480 | 8, /* bitsize */ | |
481 | FALSE, /* pc_relative */ | |
482 | 0, /* bitpos */ | |
483 | complain_overflow_dont, /* complain_on_overflow */ | |
484 | bfd_elf_generic_reloc, /* special_function */ | |
485 | "R_AVR_LO8_LDI_GS", /* name */ | |
486 | FALSE, /* partial_inplace */ | |
487 | 0xffff, /* src_mask */ | |
488 | 0xffff, /* dst_mask */ | |
489 | FALSE), /* pcrel_offset */ | |
490 | /* A low 8 bit absolute relocation of 24 bit program memory address. | |
17e57237 | 491 | For LDI command. Will be changed when linker stubs are needed. */ |
28c9d252 NC |
492 | HOWTO (R_AVR_HI8_LDI_GS, /* type */ |
493 | 9, /* rightshift */ | |
494 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
495 | 8, /* bitsize */ | |
496 | FALSE, /* pc_relative */ | |
497 | 0, /* bitpos */ | |
498 | complain_overflow_dont, /* complain_on_overflow */ | |
499 | bfd_elf_generic_reloc, /* special_function */ | |
500 | "R_AVR_HI8_LDI_GS", /* name */ | |
501 | FALSE, /* partial_inplace */ | |
502 | 0xffff, /* src_mask */ | |
503 | 0xffff, /* dst_mask */ | |
17e57237 NC |
504 | FALSE), /* pcrel_offset */ |
505 | /* 8 bit offset. */ | |
506 | HOWTO (R_AVR_8, /* type */ | |
507 | 0, /* rightshift */ | |
508 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
509 | 8, /* bitsize */ | |
510 | FALSE, /* pc_relative */ | |
511 | 0, /* bitpos */ | |
512 | complain_overflow_bitfield,/* complain_on_overflow */ | |
513 | bfd_elf_generic_reloc, /* special_function */ | |
514 | "R_AVR_8", /* name */ | |
515 | FALSE, /* partial_inplace */ | |
516 | 0x000000ff, /* src_mask */ | |
517 | 0x000000ff, /* dst_mask */ | |
518 | FALSE), /* pcrel_offset */ | |
adde6300 AM |
519 | }; |
520 | ||
521 | /* Map BFD reloc types to AVR ELF reloc types. */ | |
522 | ||
523 | struct avr_reloc_map | |
524 | { | |
525 | bfd_reloc_code_real_type bfd_reloc_val; | |
526 | unsigned int elf_reloc_val; | |
527 | }; | |
528 | ||
28c9d252 | 529 | static const struct avr_reloc_map avr_reloc_map[] = |
adde6300 AM |
530 | { |
531 | { BFD_RELOC_NONE, R_AVR_NONE }, | |
532 | { BFD_RELOC_32, R_AVR_32 }, | |
533 | { BFD_RELOC_AVR_7_PCREL, R_AVR_7_PCREL }, | |
534 | { BFD_RELOC_AVR_13_PCREL, R_AVR_13_PCREL }, | |
535 | { BFD_RELOC_16, R_AVR_16 }, | |
536 | { BFD_RELOC_AVR_16_PM, R_AVR_16_PM }, | |
537 | { BFD_RELOC_AVR_LO8_LDI, R_AVR_LO8_LDI}, | |
538 | { BFD_RELOC_AVR_HI8_LDI, R_AVR_HI8_LDI }, | |
539 | { BFD_RELOC_AVR_HH8_LDI, R_AVR_HH8_LDI }, | |
df406460 | 540 | { BFD_RELOC_AVR_MS8_LDI, R_AVR_MS8_LDI }, |
adde6300 AM |
541 | { BFD_RELOC_AVR_LO8_LDI_NEG, R_AVR_LO8_LDI_NEG }, |
542 | { BFD_RELOC_AVR_HI8_LDI_NEG, R_AVR_HI8_LDI_NEG }, | |
543 | { BFD_RELOC_AVR_HH8_LDI_NEG, R_AVR_HH8_LDI_NEG }, | |
df406460 | 544 | { BFD_RELOC_AVR_MS8_LDI_NEG, R_AVR_MS8_LDI_NEG }, |
adde6300 | 545 | { BFD_RELOC_AVR_LO8_LDI_PM, R_AVR_LO8_LDI_PM }, |
28c9d252 | 546 | { BFD_RELOC_AVR_LO8_LDI_GS, R_AVR_LO8_LDI_GS }, |
adde6300 | 547 | { BFD_RELOC_AVR_HI8_LDI_PM, R_AVR_HI8_LDI_PM }, |
28c9d252 | 548 | { BFD_RELOC_AVR_HI8_LDI_GS, R_AVR_HI8_LDI_GS }, |
adde6300 AM |
549 | { BFD_RELOC_AVR_HH8_LDI_PM, R_AVR_HH8_LDI_PM }, |
550 | { BFD_RELOC_AVR_LO8_LDI_PM_NEG, R_AVR_LO8_LDI_PM_NEG }, | |
551 | { BFD_RELOC_AVR_HI8_LDI_PM_NEG, R_AVR_HI8_LDI_PM_NEG }, | |
552 | { BFD_RELOC_AVR_HH8_LDI_PM_NEG, R_AVR_HH8_LDI_PM_NEG }, | |
750bce0e NC |
553 | { BFD_RELOC_AVR_CALL, R_AVR_CALL }, |
554 | { BFD_RELOC_AVR_LDI, R_AVR_LDI }, | |
555 | { BFD_RELOC_AVR_6, R_AVR_6 }, | |
17e57237 NC |
556 | { BFD_RELOC_AVR_6_ADIW, R_AVR_6_ADIW }, |
557 | { BFD_RELOC_8, R_AVR_8 } | |
adde6300 AM |
558 | }; |
559 | ||
df406460 | 560 | /* Meant to be filled one day with the wrap around address for the |
4cdc7696 | 561 | specific device. I.e. should get the value 0x4000 for 16k devices, |
df406460 | 562 | 0x8000 for 32k devices and so on. |
4cdc7696 | 563 | |
df406460 | 564 | We initialize it here with a value of 0x1000000 resulting in |
4cdc7696 NC |
565 | that we will never suggest a wrap-around jump during relaxation. |
566 | The logic of the source code later on assumes that in | |
df406460 | 567 | avr_pc_wrap_around one single bit is set. */ |
28c9d252 NC |
568 | static bfd_vma avr_pc_wrap_around = 0x10000000; |
569 | ||
570 | /* If this variable holds a value different from zero, the linker relaxation | |
571 | machine will try to optimize call/ret sequences by a single jump | |
572 | instruction. This option could be switched off by a linker switch. */ | |
573 | static int avr_replace_call_ret_sequences = 1; | |
574 | \f | |
575 | /* Initialize an entry in the stub hash table. */ | |
576 | ||
577 | static struct bfd_hash_entry * | |
578 | stub_hash_newfunc (struct bfd_hash_entry *entry, | |
579 | struct bfd_hash_table *table, | |
580 | const char *string) | |
581 | { | |
582 | /* Allocate the structure if it has not already been allocated by a | |
583 | subclass. */ | |
584 | if (entry == NULL) | |
585 | { | |
586 | entry = bfd_hash_allocate (table, | |
587 | sizeof (struct elf32_avr_stub_hash_entry)); | |
588 | if (entry == NULL) | |
589 | return entry; | |
590 | } | |
591 | ||
592 | /* Call the allocation method of the superclass. */ | |
593 | entry = bfd_hash_newfunc (entry, table, string); | |
594 | if (entry != NULL) | |
595 | { | |
596 | struct elf32_avr_stub_hash_entry *hsh; | |
597 | ||
598 | /* Initialize the local fields. */ | |
599 | hsh = avr_stub_hash_entry (entry); | |
600 | hsh->stub_offset = 0; | |
601 | hsh->target_value = 0; | |
602 | } | |
603 | ||
604 | return entry; | |
605 | } | |
606 | ||
64ee10b6 NC |
607 | /* This function is just a straight passthrough to the real |
608 | function in linker.c. Its prupose is so that its address | |
609 | can be compared inside the avr_link_hash_table macro. */ | |
610 | ||
611 | static struct bfd_hash_entry * | |
612 | elf32_avr_link_hash_newfunc (struct bfd_hash_entry * entry, | |
613 | struct bfd_hash_table * table, | |
614 | const char * string) | |
615 | { | |
616 | return _bfd_elf_link_hash_newfunc (entry, table, string); | |
617 | } | |
618 | ||
28c9d252 NC |
619 | /* Create the derived linker hash table. The AVR ELF port uses the derived |
620 | hash table to keep information specific to the AVR ELF linker (without | |
621 | using static variables). */ | |
622 | ||
623 | static struct bfd_link_hash_table * | |
624 | elf32_avr_link_hash_table_create (bfd *abfd) | |
625 | { | |
626 | struct elf32_avr_link_hash_table *htab; | |
627 | bfd_size_type amt = sizeof (*htab); | |
628 | ||
629 | htab = bfd_malloc (amt); | |
630 | if (htab == NULL) | |
631 | return NULL; | |
632 | ||
633 | if (!_bfd_elf_link_hash_table_init (&htab->etab, abfd, | |
64ee10b6 | 634 | elf32_avr_link_hash_newfunc, |
4dfe6ac6 NC |
635 | sizeof (struct elf_link_hash_entry), |
636 | AVR_ELF_DATA)) | |
28c9d252 NC |
637 | { |
638 | free (htab); | |
639 | return NULL; | |
640 | } | |
641 | ||
642 | /* Init the stub hash table too. */ | |
643 | if (!bfd_hash_table_init (&htab->bstab, stub_hash_newfunc, | |
644 | sizeof (struct elf32_avr_stub_hash_entry))) | |
645 | return NULL; | |
4cdc7696 | 646 | |
28c9d252 NC |
647 | htab->stub_bfd = NULL; |
648 | htab->stub_sec = NULL; | |
649 | ||
650 | /* Initialize the address mapping table. */ | |
651 | htab->amt_stub_offsets = NULL; | |
652 | htab->amt_destination_addr = NULL; | |
653 | htab->amt_entry_cnt = 0; | |
654 | htab->amt_max_entry_cnt = 0; | |
655 | ||
656 | return &htab->etab.root; | |
657 | } | |
658 | ||
659 | /* Free the derived linker hash table. */ | |
660 | ||
661 | static void | |
662 | elf32_avr_link_hash_table_free (struct bfd_link_hash_table *btab) | |
663 | { | |
664 | struct elf32_avr_link_hash_table *htab | |
665 | = (struct elf32_avr_link_hash_table *) btab; | |
666 | ||
667 | /* Free the address mapping table. */ | |
668 | if (htab->amt_stub_offsets != NULL) | |
669 | free (htab->amt_stub_offsets); | |
670 | if (htab->amt_destination_addr != NULL) | |
671 | free (htab->amt_destination_addr); | |
672 | ||
673 | bfd_hash_table_free (&htab->bstab); | |
674 | _bfd_generic_link_hash_table_free (btab); | |
675 | } | |
df406460 NC |
676 | |
677 | /* Calculates the effective distance of a pc relative jump/call. */ | |
73160847 | 678 | |
df406460 NC |
679 | static int |
680 | avr_relative_distance_considering_wrap_around (unsigned int distance) | |
4cdc7696 | 681 | { |
df406460 | 682 | unsigned int wrap_around_mask = avr_pc_wrap_around - 1; |
df406460 NC |
683 | int dist_with_wrap_around = distance & wrap_around_mask; |
684 | ||
4cdc7696 | 685 | if (dist_with_wrap_around > ((int) (avr_pc_wrap_around >> 1))) |
df406460 NC |
686 | dist_with_wrap_around -= avr_pc_wrap_around; |
687 | ||
688 | return dist_with_wrap_around; | |
689 | } | |
690 | ||
691 | ||
adde6300 | 692 | static reloc_howto_type * |
4cdc7696 NC |
693 | bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
694 | bfd_reloc_code_real_type code) | |
adde6300 AM |
695 | { |
696 | unsigned int i; | |
697 | ||
698 | for (i = 0; | |
699 | i < sizeof (avr_reloc_map) / sizeof (struct avr_reloc_map); | |
700 | i++) | |
73160847 NC |
701 | if (avr_reloc_map[i].bfd_reloc_val == code) |
702 | return &elf_avr_howto_table[avr_reloc_map[i].elf_reloc_val]; | |
adde6300 AM |
703 | |
704 | return NULL; | |
705 | } | |
706 | ||
157090f7 AM |
707 | static reloc_howto_type * |
708 | bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
709 | const char *r_name) | |
710 | { | |
711 | unsigned int i; | |
712 | ||
713 | for (i = 0; | |
714 | i < sizeof (elf_avr_howto_table) / sizeof (elf_avr_howto_table[0]); | |
715 | i++) | |
716 | if (elf_avr_howto_table[i].name != NULL | |
717 | && strcasecmp (elf_avr_howto_table[i].name, r_name) == 0) | |
718 | return &elf_avr_howto_table[i]; | |
719 | ||
720 | return NULL; | |
721 | } | |
722 | ||
adde6300 AM |
723 | /* Set the howto pointer for an AVR ELF reloc. */ |
724 | ||
725 | static void | |
4cdc7696 NC |
726 | avr_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED, |
727 | arelent *cache_ptr, | |
728 | Elf_Internal_Rela *dst) | |
adde6300 AM |
729 | { |
730 | unsigned int r_type; | |
731 | ||
732 | r_type = ELF32_R_TYPE (dst->r_info); | |
733 | BFD_ASSERT (r_type < (unsigned int) R_AVR_max); | |
734 | cache_ptr->howto = &elf_avr_howto_table[r_type]; | |
735 | } | |
736 | ||
28c9d252 NC |
737 | static bfd_boolean |
738 | avr_stub_is_required_for_16_bit_reloc (bfd_vma relocation) | |
739 | { | |
740 | return (relocation >= 0x020000); | |
741 | } | |
742 | ||
743 | /* Returns the address of the corresponding stub if there is one. | |
744 | Returns otherwise an address above 0x020000. This function | |
745 | could also be used, if there is no knowledge on the section where | |
746 | the destination is found. */ | |
747 | ||
748 | static bfd_vma | |
749 | avr_get_stub_addr (bfd_vma srel, | |
750 | struct elf32_avr_link_hash_table *htab) | |
751 | { | |
91d6fa6a | 752 | unsigned int sindex; |
28c9d252 NC |
753 | bfd_vma stub_sec_addr = |
754 | (htab->stub_sec->output_section->vma + | |
755 | htab->stub_sec->output_offset); | |
756 | ||
91d6fa6a NC |
757 | for (sindex = 0; sindex < htab->amt_max_entry_cnt; sindex ++) |
758 | if (htab->amt_destination_addr[sindex] == srel) | |
759 | return htab->amt_stub_offsets[sindex] + stub_sec_addr; | |
28c9d252 NC |
760 | |
761 | /* Return an address that could not be reached by 16 bit relocs. */ | |
762 | return 0x020000; | |
763 | } | |
764 | ||
adde6300 AM |
765 | /* Perform a single relocation. By default we use the standard BFD |
766 | routines, but a few relocs, we have to do them ourselves. */ | |
767 | ||
768 | static bfd_reloc_status_type | |
28c9d252 NC |
769 | avr_final_link_relocate (reloc_howto_type * howto, |
770 | bfd * input_bfd, | |
771 | asection * input_section, | |
772 | bfd_byte * contents, | |
773 | Elf_Internal_Rela * rel, | |
774 | bfd_vma relocation, | |
775 | struct elf32_avr_link_hash_table * htab) | |
adde6300 AM |
776 | { |
777 | bfd_reloc_status_type r = bfd_reloc_ok; | |
778 | bfd_vma x; | |
779 | bfd_signed_vma srel; | |
28c9d252 NC |
780 | bfd_signed_vma reloc_addr; |
781 | bfd_boolean use_stubs = FALSE; | |
782 | /* Usually is 0, unless we are generating code for a bootloader. */ | |
783 | bfd_signed_vma base_addr = htab->vector_base; | |
784 | ||
785 | /* Absolute addr of the reloc in the final excecutable. */ | |
786 | reloc_addr = rel->r_offset + input_section->output_section->vma | |
787 | + input_section->output_offset; | |
adde6300 AM |
788 | |
789 | switch (howto->type) | |
790 | { | |
791 | case R_AVR_7_PCREL: | |
792 | contents += rel->r_offset; | |
793 | srel = (bfd_signed_vma) relocation; | |
794 | srel += rel->r_addend; | |
795 | srel -= rel->r_offset; | |
a7c10850 | 796 | srel -= 2; /* Branch instructions add 2 to the PC... */ |
adde6300 AM |
797 | srel -= (input_section->output_section->vma + |
798 | input_section->output_offset); | |
799 | ||
800 | if (srel & 1) | |
801 | return bfd_reloc_outofrange; | |
802 | if (srel > ((1 << 7) - 1) || (srel < - (1 << 7))) | |
803 | return bfd_reloc_overflow; | |
804 | x = bfd_get_16 (input_bfd, contents); | |
805 | x = (x & 0xfc07) | (((srel >> 1) << 3) & 0x3f8); | |
806 | bfd_put_16 (input_bfd, x, contents); | |
807 | break; | |
808 | ||
809 | case R_AVR_13_PCREL: | |
810 | contents += rel->r_offset; | |
811 | srel = (bfd_signed_vma) relocation; | |
812 | srel += rel->r_addend; | |
813 | srel -= rel->r_offset; | |
a7c10850 | 814 | srel -= 2; /* Branch instructions add 2 to the PC... */ |
adde6300 AM |
815 | srel -= (input_section->output_section->vma + |
816 | input_section->output_offset); | |
817 | ||
818 | if (srel & 1) | |
819 | return bfd_reloc_outofrange; | |
820 | ||
df406460 NC |
821 | srel = avr_relative_distance_considering_wrap_around (srel); |
822 | ||
adde6300 AM |
823 | /* AVR addresses commands as words. */ |
824 | srel >>= 1; | |
825 | ||
826 | /* Check for overflow. */ | |
827 | if (srel < -2048 || srel > 2047) | |
828 | { | |
df406460 NC |
829 | /* Relative distance is too large. */ |
830 | ||
654c3c9f | 831 | /* Always apply WRAPAROUND for avr2, avr25, and avr4. */ |
65aa24b6 | 832 | switch (bfd_get_mach (input_bfd)) |
adde6300 | 833 | { |
65aa24b6 | 834 | case bfd_mach_avr2: |
654c3c9f | 835 | case bfd_mach_avr25: |
65aa24b6 NC |
836 | case bfd_mach_avr4: |
837 | break; | |
838 | ||
839 | default: | |
840 | return bfd_reloc_overflow; | |
adde6300 | 841 | } |
adde6300 AM |
842 | } |
843 | ||
844 | x = bfd_get_16 (input_bfd, contents); | |
845 | x = (x & 0xf000) | (srel & 0xfff); | |
846 | bfd_put_16 (input_bfd, x, contents); | |
847 | break; | |
848 | ||
849 | case R_AVR_LO8_LDI: | |
850 | contents += rel->r_offset; | |
851 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
852 | x = bfd_get_16 (input_bfd, contents); | |
853 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
854 | bfd_put_16 (input_bfd, x, contents); | |
855 | break; | |
856 | ||
750bce0e NC |
857 | case R_AVR_LDI: |
858 | contents += rel->r_offset; | |
859 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
4cdc7696 NC |
860 | if (((srel > 0) && (srel & 0xffff) > 255) |
861 | || ((srel < 0) && ((-srel) & 0xffff) > 128)) | |
df406460 NC |
862 | /* Remove offset for data/eeprom section. */ |
863 | return bfd_reloc_overflow; | |
864 | ||
750bce0e NC |
865 | x = bfd_get_16 (input_bfd, contents); |
866 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
867 | bfd_put_16 (input_bfd, x, contents); | |
868 | break; | |
869 | ||
870 | case R_AVR_6: | |
871 | contents += rel->r_offset; | |
872 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
873 | if (((srel & 0xffff) > 63) || (srel < 0)) | |
874 | /* Remove offset for data/eeprom section. */ | |
875 | return bfd_reloc_overflow; | |
876 | x = bfd_get_16 (input_bfd, contents); | |
4cdc7696 | 877 | x = (x & 0xd3f8) | ((srel & 7) | ((srel & (3 << 3)) << 7) |
df406460 | 878 | | ((srel & (1 << 5)) << 8)); |
750bce0e NC |
879 | bfd_put_16 (input_bfd, x, contents); |
880 | break; | |
881 | ||
882 | case R_AVR_6_ADIW: | |
883 | contents += rel->r_offset; | |
884 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
885 | if (((srel & 0xffff) > 63) || (srel < 0)) | |
886 | /* Remove offset for data/eeprom section. */ | |
887 | return bfd_reloc_overflow; | |
888 | x = bfd_get_16 (input_bfd, contents); | |
4cdc7696 | 889 | x = (x & 0xff30) | (srel & 0xf) | ((srel & 0x30) << 2); |
750bce0e NC |
890 | bfd_put_16 (input_bfd, x, contents); |
891 | break; | |
892 | ||
adde6300 AM |
893 | case R_AVR_HI8_LDI: |
894 | contents += rel->r_offset; | |
895 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
896 | srel = (srel >> 8) & 0xff; | |
897 | x = bfd_get_16 (input_bfd, contents); | |
898 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
899 | bfd_put_16 (input_bfd, x, contents); | |
900 | break; | |
901 | ||
902 | case R_AVR_HH8_LDI: | |
903 | contents += rel->r_offset; | |
904 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
905 | srel = (srel >> 16) & 0xff; | |
906 | x = bfd_get_16 (input_bfd, contents); | |
907 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
908 | bfd_put_16 (input_bfd, x, contents); | |
909 | break; | |
910 | ||
df406460 NC |
911 | case R_AVR_MS8_LDI: |
912 | contents += rel->r_offset; | |
913 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
914 | srel = (srel >> 24) & 0xff; | |
915 | x = bfd_get_16 (input_bfd, contents); | |
916 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
917 | bfd_put_16 (input_bfd, x, contents); | |
918 | break; | |
919 | ||
adde6300 AM |
920 | case R_AVR_LO8_LDI_NEG: |
921 | contents += rel->r_offset; | |
922 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
923 | srel = -srel; | |
924 | x = bfd_get_16 (input_bfd, contents); | |
925 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
926 | bfd_put_16 (input_bfd, x, contents); | |
927 | break; | |
928 | ||
929 | case R_AVR_HI8_LDI_NEG: | |
930 | contents += rel->r_offset; | |
931 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
932 | srel = -srel; | |
933 | srel = (srel >> 8) & 0xff; | |
934 | x = bfd_get_16 (input_bfd, contents); | |
935 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
936 | bfd_put_16 (input_bfd, x, contents); | |
937 | break; | |
938 | ||
939 | case R_AVR_HH8_LDI_NEG: | |
940 | contents += rel->r_offset; | |
941 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
942 | srel = -srel; | |
943 | srel = (srel >> 16) & 0xff; | |
944 | x = bfd_get_16 (input_bfd, contents); | |
945 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
946 | bfd_put_16 (input_bfd, x, contents); | |
947 | break; | |
948 | ||
df406460 NC |
949 | case R_AVR_MS8_LDI_NEG: |
950 | contents += rel->r_offset; | |
951 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
952 | srel = -srel; | |
953 | srel = (srel >> 24) & 0xff; | |
954 | x = bfd_get_16 (input_bfd, contents); | |
955 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
956 | bfd_put_16 (input_bfd, x, contents); | |
957 | break; | |
958 | ||
28c9d252 NC |
959 | case R_AVR_LO8_LDI_GS: |
960 | use_stubs = (!htab->no_stubs); | |
961 | /* Fall through. */ | |
adde6300 AM |
962 | case R_AVR_LO8_LDI_PM: |
963 | contents += rel->r_offset; | |
964 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
28c9d252 NC |
965 | |
966 | if (use_stubs | |
967 | && avr_stub_is_required_for_16_bit_reloc (srel - base_addr)) | |
968 | { | |
969 | bfd_vma old_srel = srel; | |
970 | ||
971 | /* We need to use the address of the stub instead. */ | |
972 | srel = avr_get_stub_addr (srel, htab); | |
973 | if (debug_stubs) | |
974 | printf ("LD: Using jump stub (at 0x%x) with destination 0x%x for " | |
975 | "reloc at address 0x%x.\n", | |
976 | (unsigned int) srel, | |
977 | (unsigned int) old_srel, | |
978 | (unsigned int) reloc_addr); | |
979 | ||
980 | if (avr_stub_is_required_for_16_bit_reloc (srel - base_addr)) | |
981 | return bfd_reloc_outofrange; | |
982 | } | |
983 | ||
adde6300 AM |
984 | if (srel & 1) |
985 | return bfd_reloc_outofrange; | |
986 | srel = srel >> 1; | |
987 | x = bfd_get_16 (input_bfd, contents); | |
988 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
989 | bfd_put_16 (input_bfd, x, contents); | |
990 | break; | |
991 | ||
28c9d252 NC |
992 | case R_AVR_HI8_LDI_GS: |
993 | use_stubs = (!htab->no_stubs); | |
994 | /* Fall through. */ | |
adde6300 AM |
995 | case R_AVR_HI8_LDI_PM: |
996 | contents += rel->r_offset; | |
997 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
28c9d252 NC |
998 | |
999 | if (use_stubs | |
1000 | && avr_stub_is_required_for_16_bit_reloc (srel - base_addr)) | |
1001 | { | |
1002 | bfd_vma old_srel = srel; | |
1003 | ||
1004 | /* We need to use the address of the stub instead. */ | |
1005 | srel = avr_get_stub_addr (srel, htab); | |
1006 | if (debug_stubs) | |
1007 | printf ("LD: Using jump stub (at 0x%x) with destination 0x%x for " | |
1008 | "reloc at address 0x%x.\n", | |
1009 | (unsigned int) srel, | |
1010 | (unsigned int) old_srel, | |
1011 | (unsigned int) reloc_addr); | |
1012 | ||
1013 | if (avr_stub_is_required_for_16_bit_reloc (srel - base_addr)) | |
1014 | return bfd_reloc_outofrange; | |
1015 | } | |
1016 | ||
adde6300 AM |
1017 | if (srel & 1) |
1018 | return bfd_reloc_outofrange; | |
1019 | srel = srel >> 1; | |
1020 | srel = (srel >> 8) & 0xff; | |
1021 | x = bfd_get_16 (input_bfd, contents); | |
1022 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
1023 | bfd_put_16 (input_bfd, x, contents); | |
1024 | break; | |
1025 | ||
1026 | case R_AVR_HH8_LDI_PM: | |
1027 | contents += rel->r_offset; | |
1028 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
1029 | if (srel & 1) | |
1030 | return bfd_reloc_outofrange; | |
1031 | srel = srel >> 1; | |
1032 | srel = (srel >> 16) & 0xff; | |
1033 | x = bfd_get_16 (input_bfd, contents); | |
1034 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
1035 | bfd_put_16 (input_bfd, x, contents); | |
1036 | break; | |
1037 | ||
1038 | case R_AVR_LO8_LDI_PM_NEG: | |
1039 | contents += rel->r_offset; | |
1040 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
1041 | srel = -srel; | |
1042 | if (srel & 1) | |
1043 | return bfd_reloc_outofrange; | |
1044 | srel = srel >> 1; | |
1045 | x = bfd_get_16 (input_bfd, contents); | |
1046 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
1047 | bfd_put_16 (input_bfd, x, contents); | |
1048 | break; | |
1049 | ||
1050 | case R_AVR_HI8_LDI_PM_NEG: | |
1051 | contents += rel->r_offset; | |
1052 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
1053 | srel = -srel; | |
1054 | if (srel & 1) | |
1055 | return bfd_reloc_outofrange; | |
1056 | srel = srel >> 1; | |
1057 | srel = (srel >> 8) & 0xff; | |
1058 | x = bfd_get_16 (input_bfd, contents); | |
1059 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
1060 | bfd_put_16 (input_bfd, x, contents); | |
1061 | break; | |
1062 | ||
1063 | case R_AVR_HH8_LDI_PM_NEG: | |
1064 | contents += rel->r_offset; | |
1065 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
1066 | srel = -srel; | |
1067 | if (srel & 1) | |
1068 | return bfd_reloc_outofrange; | |
1069 | srel = srel >> 1; | |
1070 | srel = (srel >> 16) & 0xff; | |
1071 | x = bfd_get_16 (input_bfd, contents); | |
1072 | x = (x & 0xf0f0) | (srel & 0xf) | ((srel << 4) & 0xf00); | |
1073 | bfd_put_16 (input_bfd, x, contents); | |
1074 | break; | |
1075 | ||
1076 | case R_AVR_CALL: | |
1077 | contents += rel->r_offset; | |
1078 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
1079 | if (srel & 1) | |
1080 | return bfd_reloc_outofrange; | |
1081 | srel = srel >> 1; | |
1082 | x = bfd_get_16 (input_bfd, contents); | |
1083 | x |= ((srel & 0x10000) | ((srel << 3) & 0x1f00000)) >> 16; | |
1084 | bfd_put_16 (input_bfd, x, contents); | |
dc810e39 | 1085 | bfd_put_16 (input_bfd, (bfd_vma) srel & 0xffff, contents+2); |
adde6300 AM |
1086 | break; |
1087 | ||
28c9d252 NC |
1088 | case R_AVR_16_PM: |
1089 | use_stubs = (!htab->no_stubs); | |
1090 | contents += rel->r_offset; | |
1091 | srel = (bfd_signed_vma) relocation + rel->r_addend; | |
1092 | ||
1093 | if (use_stubs | |
1094 | && avr_stub_is_required_for_16_bit_reloc (srel - base_addr)) | |
1095 | { | |
1096 | bfd_vma old_srel = srel; | |
1097 | ||
1098 | /* We need to use the address of the stub instead. */ | |
1099 | srel = avr_get_stub_addr (srel,htab); | |
1100 | if (debug_stubs) | |
1101 | printf ("LD: Using jump stub (at 0x%x) with destination 0x%x for " | |
1102 | "reloc at address 0x%x.\n", | |
1103 | (unsigned int) srel, | |
1104 | (unsigned int) old_srel, | |
1105 | (unsigned int) reloc_addr); | |
1106 | ||
1107 | if (avr_stub_is_required_for_16_bit_reloc (srel - base_addr)) | |
1108 | return bfd_reloc_outofrange; | |
1109 | } | |
1110 | ||
1111 | if (srel & 1) | |
1112 | return bfd_reloc_outofrange; | |
1113 | srel = srel >> 1; | |
1114 | bfd_put_16 (input_bfd, (bfd_vma) srel &0x00ffff, contents); | |
1115 | break; | |
1116 | ||
adde6300 AM |
1117 | default: |
1118 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1119 | contents, rel->r_offset, | |
1120 | relocation, rel->r_addend); | |
1121 | } | |
1122 | ||
1123 | return r; | |
1124 | } | |
1125 | ||
1126 | /* Relocate an AVR ELF section. */ | |
4cdc7696 | 1127 | |
b34976b6 | 1128 | static bfd_boolean |
4cdc7696 NC |
1129 | elf32_avr_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED, |
1130 | struct bfd_link_info *info, | |
1131 | bfd *input_bfd, | |
1132 | asection *input_section, | |
1133 | bfd_byte *contents, | |
1134 | Elf_Internal_Rela *relocs, | |
1135 | Elf_Internal_Sym *local_syms, | |
1136 | asection **local_sections) | |
adde6300 AM |
1137 | { |
1138 | Elf_Internal_Shdr * symtab_hdr; | |
1139 | struct elf_link_hash_entry ** sym_hashes; | |
1140 | Elf_Internal_Rela * rel; | |
1141 | Elf_Internal_Rela * relend; | |
28c9d252 | 1142 | struct elf32_avr_link_hash_table * htab = avr_link_hash_table (info); |
adde6300 | 1143 | |
4dfe6ac6 NC |
1144 | if (htab == NULL) |
1145 | return FALSE; | |
1146 | ||
adde6300 AM |
1147 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
1148 | sym_hashes = elf_sym_hashes (input_bfd); | |
1149 | relend = relocs + input_section->reloc_count; | |
1150 | ||
1151 | for (rel = relocs; rel < relend; rel ++) | |
1152 | { | |
1153 | reloc_howto_type * howto; | |
1154 | unsigned long r_symndx; | |
1155 | Elf_Internal_Sym * sym; | |
1156 | asection * sec; | |
1157 | struct elf_link_hash_entry * h; | |
1158 | bfd_vma relocation; | |
1159 | bfd_reloc_status_type r; | |
dfeffb9f | 1160 | const char * name; |
adde6300 AM |
1161 | int r_type; |
1162 | ||
1163 | r_type = ELF32_R_TYPE (rel->r_info); | |
1164 | r_symndx = ELF32_R_SYM (rel->r_info); | |
c7e2358a | 1165 | howto = elf_avr_howto_table + r_type; |
adde6300 AM |
1166 | h = NULL; |
1167 | sym = NULL; | |
1168 | sec = NULL; | |
1169 | ||
1170 | if (r_symndx < symtab_hdr->sh_info) | |
1171 | { | |
1172 | sym = local_syms + r_symndx; | |
1173 | sec = local_sections [r_symndx]; | |
8517fae7 | 1174 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
adde6300 AM |
1175 | |
1176 | name = bfd_elf_string_from_elf_section | |
1177 | (input_bfd, symtab_hdr->sh_link, sym->st_name); | |
1178 | name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name; | |
1179 | } | |
1180 | else | |
1181 | { | |
59c2e50f | 1182 | bfd_boolean unresolved_reloc, warned; |
adde6300 | 1183 | |
b2a8e766 AM |
1184 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
1185 | r_symndx, symtab_hdr, sym_hashes, | |
1186 | h, sec, relocation, | |
1187 | unresolved_reloc, warned); | |
dfeffb9f L |
1188 | |
1189 | name = h->root.root.string; | |
adde6300 AM |
1190 | } |
1191 | ||
ab96bf03 | 1192 | if (sec != NULL && elf_discarded_section (sec)) |
e4067dbb DJ |
1193 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
1194 | rel, relend, howto, contents); | |
ab96bf03 AM |
1195 | |
1196 | if (info->relocatable) | |
1197 | continue; | |
1198 | ||
adde6300 | 1199 | r = avr_final_link_relocate (howto, input_bfd, input_section, |
28c9d252 | 1200 | contents, rel, relocation, htab); |
adde6300 AM |
1201 | |
1202 | if (r != bfd_reloc_ok) | |
1203 | { | |
1204 | const char * msg = (const char *) NULL; | |
1205 | ||
1206 | switch (r) | |
1207 | { | |
1208 | case bfd_reloc_overflow: | |
1209 | r = info->callbacks->reloc_overflow | |
dfeffb9f L |
1210 | (info, (h ? &h->root : NULL), |
1211 | name, howto->name, (bfd_vma) 0, | |
adde6300 AM |
1212 | input_bfd, input_section, rel->r_offset); |
1213 | break; | |
1214 | ||
1215 | case bfd_reloc_undefined: | |
1216 | r = info->callbacks->undefined_symbol | |
b34976b6 | 1217 | (info, name, input_bfd, input_section, rel->r_offset, TRUE); |
adde6300 AM |
1218 | break; |
1219 | ||
1220 | case bfd_reloc_outofrange: | |
1221 | msg = _("internal error: out of range error"); | |
1222 | break; | |
1223 | ||
1224 | case bfd_reloc_notsupported: | |
1225 | msg = _("internal error: unsupported relocation error"); | |
1226 | break; | |
1227 | ||
1228 | case bfd_reloc_dangerous: | |
1229 | msg = _("internal error: dangerous relocation"); | |
1230 | break; | |
1231 | ||
1232 | default: | |
1233 | msg = _("internal error: unknown error"); | |
1234 | break; | |
1235 | } | |
1236 | ||
1237 | if (msg) | |
1238 | r = info->callbacks->warning | |
1239 | (info, msg, name, input_bfd, input_section, rel->r_offset); | |
1240 | ||
1241 | if (! r) | |
b34976b6 | 1242 | return FALSE; |
adde6300 AM |
1243 | } |
1244 | } | |
1245 | ||
b34976b6 | 1246 | return TRUE; |
adde6300 AM |
1247 | } |
1248 | ||
1249 | /* The final processing done just before writing out a AVR ELF object | |
1250 | file. This gets the AVR architecture right based on the machine | |
1251 | number. */ | |
1252 | ||
1253 | static void | |
4cdc7696 NC |
1254 | bfd_elf_avr_final_write_processing (bfd *abfd, |
1255 | bfd_boolean linker ATTRIBUTE_UNUSED) | |
adde6300 AM |
1256 | { |
1257 | unsigned long val; | |
1258 | ||
1259 | switch (bfd_get_mach (abfd)) | |
1260 | { | |
1261 | default: | |
1262 | case bfd_mach_avr2: | |
1263 | val = E_AVR_MACH_AVR2; | |
1264 | break; | |
1265 | ||
1266 | case bfd_mach_avr1: | |
1267 | val = E_AVR_MACH_AVR1; | |
1268 | break; | |
1269 | ||
7b21ac3f EW |
1270 | case bfd_mach_avr25: |
1271 | val = E_AVR_MACH_AVR25; | |
28b02751 | 1272 | break; |
7b21ac3f | 1273 | |
adde6300 AM |
1274 | case bfd_mach_avr3: |
1275 | val = E_AVR_MACH_AVR3; | |
1276 | break; | |
1277 | ||
7b21ac3f EW |
1278 | case bfd_mach_avr31: |
1279 | val = E_AVR_MACH_AVR31; | |
28b02751 | 1280 | break; |
7b21ac3f EW |
1281 | |
1282 | case bfd_mach_avr35: | |
1283 | val = E_AVR_MACH_AVR35; | |
28b02751 | 1284 | break; |
7b21ac3f | 1285 | |
adde6300 AM |
1286 | case bfd_mach_avr4: |
1287 | val = E_AVR_MACH_AVR4; | |
1288 | break; | |
1289 | ||
65aa24b6 NC |
1290 | case bfd_mach_avr5: |
1291 | val = E_AVR_MACH_AVR5; | |
1292 | break; | |
28c9d252 | 1293 | |
7b21ac3f EW |
1294 | case bfd_mach_avr51: |
1295 | val = E_AVR_MACH_AVR51; | |
1296 | break; | |
1297 | ||
28c9d252 NC |
1298 | case bfd_mach_avr6: |
1299 | val = E_AVR_MACH_AVR6; | |
1300 | break; | |
8cc66334 EW |
1301 | |
1302 | case bfd_mach_avrxmega1: | |
1303 | val = E_AVR_MACH_XMEGA1; | |
1304 | break; | |
1305 | ||
1306 | case bfd_mach_avrxmega2: | |
1307 | val = E_AVR_MACH_XMEGA2; | |
1308 | break; | |
1309 | ||
1310 | case bfd_mach_avrxmega3: | |
1311 | val = E_AVR_MACH_XMEGA3; | |
1312 | break; | |
1313 | ||
1314 | case bfd_mach_avrxmega4: | |
1315 | val = E_AVR_MACH_XMEGA4; | |
1316 | break; | |
1317 | ||
1318 | case bfd_mach_avrxmega5: | |
1319 | val = E_AVR_MACH_XMEGA5; | |
1320 | break; | |
1321 | ||
1322 | case bfd_mach_avrxmega6: | |
1323 | val = E_AVR_MACH_XMEGA6; | |
1324 | break; | |
1325 | ||
1326 | case bfd_mach_avrxmega7: | |
1327 | val = E_AVR_MACH_XMEGA7; | |
1328 | break; | |
adde6300 AM |
1329 | } |
1330 | ||
1331 | elf_elfheader (abfd)->e_machine = EM_AVR; | |
1332 | elf_elfheader (abfd)->e_flags &= ~ EF_AVR_MACH; | |
1333 | elf_elfheader (abfd)->e_flags |= val; | |
df406460 | 1334 | elf_elfheader (abfd)->e_flags |= EF_AVR_LINKRELAX_PREPARED; |
adde6300 AM |
1335 | } |
1336 | ||
1337 | /* Set the right machine number. */ | |
1338 | ||
b34976b6 | 1339 | static bfd_boolean |
4cdc7696 | 1340 | elf32_avr_object_p (bfd *abfd) |
adde6300 | 1341 | { |
dc810e39 | 1342 | unsigned int e_set = bfd_mach_avr2; |
4cdc7696 | 1343 | |
aa4f99bb AO |
1344 | if (elf_elfheader (abfd)->e_machine == EM_AVR |
1345 | || elf_elfheader (abfd)->e_machine == EM_AVR_OLD) | |
adde6300 AM |
1346 | { |
1347 | int e_mach = elf_elfheader (abfd)->e_flags & EF_AVR_MACH; | |
4cdc7696 | 1348 | |
adde6300 AM |
1349 | switch (e_mach) |
1350 | { | |
1351 | default: | |
1352 | case E_AVR_MACH_AVR2: | |
1353 | e_set = bfd_mach_avr2; | |
1354 | break; | |
1355 | ||
1356 | case E_AVR_MACH_AVR1: | |
1357 | e_set = bfd_mach_avr1; | |
1358 | break; | |
1359 | ||
7b21ac3f EW |
1360 | case E_AVR_MACH_AVR25: |
1361 | e_set = bfd_mach_avr25; | |
1362 | break; | |
1363 | ||
adde6300 AM |
1364 | case E_AVR_MACH_AVR3: |
1365 | e_set = bfd_mach_avr3; | |
1366 | break; | |
1367 | ||
7b21ac3f EW |
1368 | case E_AVR_MACH_AVR31: |
1369 | e_set = bfd_mach_avr31; | |
1370 | break; | |
1371 | ||
1372 | case E_AVR_MACH_AVR35: | |
1373 | e_set = bfd_mach_avr35; | |
1374 | break; | |
1375 | ||
adde6300 AM |
1376 | case E_AVR_MACH_AVR4: |
1377 | e_set = bfd_mach_avr4; | |
1378 | break; | |
65aa24b6 NC |
1379 | |
1380 | case E_AVR_MACH_AVR5: | |
1381 | e_set = bfd_mach_avr5; | |
1382 | break; | |
28c9d252 | 1383 | |
7b21ac3f EW |
1384 | case E_AVR_MACH_AVR51: |
1385 | e_set = bfd_mach_avr51; | |
1386 | break; | |
1387 | ||
28c9d252 NC |
1388 | case E_AVR_MACH_AVR6: |
1389 | e_set = bfd_mach_avr6; | |
1390 | break; | |
8cc66334 EW |
1391 | |
1392 | case E_AVR_MACH_XMEGA1: | |
1393 | e_set = bfd_mach_avrxmega1; | |
1394 | break; | |
1395 | ||
1396 | case E_AVR_MACH_XMEGA2: | |
1397 | e_set = bfd_mach_avrxmega2; | |
1398 | break; | |
1399 | ||
1400 | case E_AVR_MACH_XMEGA3: | |
1401 | e_set = bfd_mach_avrxmega3; | |
1402 | break; | |
1403 | ||
1404 | case E_AVR_MACH_XMEGA4: | |
1405 | e_set = bfd_mach_avrxmega4; | |
1406 | break; | |
1407 | ||
1408 | case E_AVR_MACH_XMEGA5: | |
1409 | e_set = bfd_mach_avrxmega5; | |
1410 | break; | |
1411 | ||
1412 | case E_AVR_MACH_XMEGA6: | |
1413 | e_set = bfd_mach_avrxmega6; | |
1414 | break; | |
1415 | ||
1416 | case E_AVR_MACH_XMEGA7: | |
1417 | e_set = bfd_mach_avrxmega7; | |
1418 | break; | |
adde6300 AM |
1419 | } |
1420 | } | |
1421 | return bfd_default_set_arch_mach (abfd, bfd_arch_avr, | |
1422 | e_set); | |
1423 | } | |
1424 | ||
df406460 | 1425 | |
4cdc7696 NC |
1426 | /* Delete some bytes from a section while changing the size of an instruction. |
1427 | The parameter "addr" denotes the section-relative offset pointing just | |
1428 | behind the shrinked instruction. "addr+count" point at the first | |
1429 | byte just behind the original unshrinked instruction. */ | |
1430 | ||
1431 | static bfd_boolean | |
1432 | elf32_avr_relax_delete_bytes (bfd *abfd, | |
73160847 | 1433 | asection *sec, |
4cdc7696 | 1434 | bfd_vma addr, |
73160847 | 1435 | int count) |
4cdc7696 NC |
1436 | { |
1437 | Elf_Internal_Shdr *symtab_hdr; | |
1438 | unsigned int sec_shndx; | |
1439 | bfd_byte *contents; | |
1440 | Elf_Internal_Rela *irel, *irelend; | |
4cdc7696 NC |
1441 | Elf_Internal_Sym *isym; |
1442 | Elf_Internal_Sym *isymbuf = NULL; | |
4cdc7696 NC |
1443 | bfd_vma toaddr; |
1444 | struct elf_link_hash_entry **sym_hashes; | |
1445 | struct elf_link_hash_entry **end_hashes; | |
1446 | unsigned int symcount; | |
1447 | ||
1448 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1449 | sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); | |
1450 | contents = elf_section_data (sec)->this_hdr.contents; | |
1451 | ||
4cdc7696 NC |
1452 | toaddr = sec->size; |
1453 | ||
1454 | irel = elf_section_data (sec)->relocs; | |
1455 | irelend = irel + sec->reloc_count; | |
1456 | ||
1457 | /* Actually delete the bytes. */ | |
1458 | if (toaddr - addr - count > 0) | |
1459 | memmove (contents + addr, contents + addr + count, | |
1460 | (size_t) (toaddr - addr - count)); | |
1461 | sec->size -= count; | |
1462 | ||
73160847 | 1463 | /* Adjust all the reloc addresses. */ |
4cdc7696 NC |
1464 | for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++) |
1465 | { | |
4cdc7696 | 1466 | bfd_vma old_reloc_address; |
4cdc7696 NC |
1467 | |
1468 | old_reloc_address = (sec->output_section->vma | |
1469 | + sec->output_offset + irel->r_offset); | |
4cdc7696 NC |
1470 | |
1471 | /* Get the new reloc address. */ | |
1472 | if ((irel->r_offset > addr | |
1473 | && irel->r_offset < toaddr)) | |
1474 | { | |
28c9d252 | 1475 | if (debug_relax) |
4cdc7696 NC |
1476 | printf ("Relocation at address 0x%x needs to be moved.\n" |
1477 | "Old section offset: 0x%x, New section offset: 0x%x \n", | |
1478 | (unsigned int) old_reloc_address, | |
1479 | (unsigned int) irel->r_offset, | |
1480 | (unsigned int) ((irel->r_offset) - count)); | |
1481 | ||
1482 | irel->r_offset -= count; | |
1483 | } | |
1484 | ||
73160847 | 1485 | } |
4cdc7696 | 1486 | |
73160847 NC |
1487 | /* The reloc's own addresses are now ok. However, we need to readjust |
1488 | the reloc's addend, i.e. the reloc's value if two conditions are met: | |
1489 | 1.) the reloc is relative to a symbol in this section that | |
1490 | is located in front of the shrinked instruction | |
28c9d252 NC |
1491 | 2.) symbol plus addend end up behind the shrinked instruction. |
1492 | ||
73160847 NC |
1493 | The most common case where this happens are relocs relative to |
1494 | the section-start symbol. | |
28c9d252 | 1495 | |
73160847 NC |
1496 | This step needs to be done for all of the sections of the bfd. */ |
1497 | ||
1498 | { | |
1499 | struct bfd_section *isec; | |
1500 | ||
1501 | for (isec = abfd->sections; isec; isec = isec->next) | |
1502 | { | |
1503 | bfd_vma symval; | |
1504 | bfd_vma shrinked_insn_address; | |
1505 | ||
1506 | shrinked_insn_address = (sec->output_section->vma | |
1507 | + sec->output_offset + addr - count); | |
1508 | ||
1509 | irelend = elf_section_data (isec)->relocs + isec->reloc_count; | |
28c9d252 | 1510 | for (irel = elf_section_data (isec)->relocs; |
73160847 NC |
1511 | irel < irelend; |
1512 | irel++) | |
1513 | { | |
28c9d252 | 1514 | /* Read this BFD's local symbols if we haven't done |
73160847 NC |
1515 | so already. */ |
1516 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) | |
1517 | { | |
1518 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
1519 | if (isymbuf == NULL) | |
1520 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
1521 | symtab_hdr->sh_info, 0, | |
1522 | NULL, NULL, NULL); | |
1523 | if (isymbuf == NULL) | |
1524 | return FALSE; | |
1525 | } | |
1526 | ||
1527 | /* Get the value of the symbol referred to by the reloc. */ | |
1528 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
1529 | { | |
1530 | /* A local symbol. */ | |
73160847 NC |
1531 | asection *sym_sec; |
1532 | ||
1533 | isym = isymbuf + ELF32_R_SYM (irel->r_info); | |
1534 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
1535 | symval = isym->st_value; | |
1536 | /* If the reloc is absolute, it will not have | |
1537 | a symbol or section associated with it. */ | |
1538 | if (sym_sec == sec) | |
28c9d252 | 1539 | { |
73160847 NC |
1540 | symval += sym_sec->output_section->vma |
1541 | + sym_sec->output_offset; | |
4cdc7696 | 1542 | |
28c9d252 | 1543 | if (debug_relax) |
73160847 NC |
1544 | printf ("Checking if the relocation's " |
1545 | "addend needs corrections.\n" | |
1546 | "Address of anchor symbol: 0x%x \n" | |
1547 | "Address of relocation target: 0x%x \n" | |
1548 | "Address of relaxed insn: 0x%x \n", | |
1549 | (unsigned int) symval, | |
1550 | (unsigned int) (symval + irel->r_addend), | |
1551 | (unsigned int) shrinked_insn_address); | |
1552 | ||
1553 | if (symval <= shrinked_insn_address | |
1554 | && (symval + irel->r_addend) > shrinked_insn_address) | |
1555 | { | |
1556 | irel->r_addend -= count; | |
1557 | ||
28c9d252 | 1558 | if (debug_relax) |
73160847 NC |
1559 | printf ("Relocation's addend needed to be fixed \n"); |
1560 | } | |
4cdc7696 | 1561 | } |
73160847 | 1562 | /* else...Reference symbol is absolute. No adjustment needed. */ |
28c9d252 NC |
1563 | } |
1564 | /* else...Reference symbol is extern. No need for adjusting | |
73160847 | 1565 | the addend. */ |
28c9d252 | 1566 | } |
73160847 NC |
1567 | } |
1568 | } | |
4cdc7696 NC |
1569 | |
1570 | /* Adjust the local symbols defined in this section. */ | |
1571 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; | |
12123067 NC |
1572 | /* Fix PR 9841, there may be no local symbols. */ |
1573 | if (isym != NULL) | |
4cdc7696 | 1574 | { |
12123067 NC |
1575 | Elf_Internal_Sym *isymend; |
1576 | ||
1577 | isymend = isym + symtab_hdr->sh_info; | |
1578 | for (; isym < isymend; isym++) | |
1579 | { | |
1580 | if (isym->st_shndx == sec_shndx | |
1581 | && isym->st_value > addr | |
1582 | && isym->st_value < toaddr) | |
1583 | isym->st_value -= count; | |
1584 | } | |
4cdc7696 NC |
1585 | } |
1586 | ||
1587 | /* Now adjust the global symbols defined in this section. */ | |
1588 | symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym) | |
1589 | - symtab_hdr->sh_info); | |
1590 | sym_hashes = elf_sym_hashes (abfd); | |
1591 | end_hashes = sym_hashes + symcount; | |
1592 | for (; sym_hashes < end_hashes; sym_hashes++) | |
1593 | { | |
1594 | struct elf_link_hash_entry *sym_hash = *sym_hashes; | |
1595 | if ((sym_hash->root.type == bfd_link_hash_defined | |
1596 | || sym_hash->root.type == bfd_link_hash_defweak) | |
1597 | && sym_hash->root.u.def.section == sec | |
1598 | && sym_hash->root.u.def.value > addr | |
1599 | && sym_hash->root.u.def.value < toaddr) | |
1600 | { | |
1601 | sym_hash->root.u.def.value -= count; | |
1602 | } | |
1603 | } | |
1604 | ||
1605 | return TRUE; | |
1606 | } | |
1607 | ||
df406460 NC |
1608 | /* This function handles relaxing for the avr. |
1609 | Many important relaxing opportunities within functions are already | |
1610 | realized by the compiler itself. | |
1611 | Here we try to replace call (4 bytes) -> rcall (2 bytes) | |
4cdc7696 NC |
1612 | and jump -> rjmp (safes also 2 bytes). |
1613 | As well we now optimize seqences of | |
df406460 NC |
1614 | - call/rcall function |
1615 | - ret | |
1616 | to yield | |
1617 | - jmp/rjmp function | |
1618 | - ret | |
1619 | . In case that within a sequence | |
1620 | - jmp/rjmp label | |
1621 | - ret | |
1622 | the ret could no longer be reached it is optimized away. In order | |
1623 | to check if the ret is no longer needed, it is checked that the ret's address | |
1624 | is not the target of a branch or jump within the same section, it is checked | |
1625 | that there is no skip instruction before the jmp/rjmp and that there | |
1626 | is no local or global label place at the address of the ret. | |
4cdc7696 | 1627 | |
df406460 | 1628 | We refrain from relaxing within sections ".vectors" and |
4cdc7696 | 1629 | ".jumptables" in order to maintain the position of the instructions. |
df406460 | 1630 | There, however, we substitute jmp/call by a sequence rjmp,nop/rcall,nop |
4cdc7696 | 1631 | if possible. (In future one could possibly use the space of the nop |
df406460 NC |
1632 | for the first instruction of the irq service function. |
1633 | ||
1634 | The .jumptables sections is meant to be used for a future tablejump variant | |
1635 | for the devices with 3-byte program counter where the table itself | |
4cdc7696 | 1636 | contains 4-byte jump instructions whose relative offset must not |
df406460 | 1637 | be changed. */ |
4cdc7696 | 1638 | |
28c9d252 | 1639 | static bfd_boolean |
4cdc7696 NC |
1640 | elf32_avr_relax_section (bfd *abfd, |
1641 | asection *sec, | |
df406460 NC |
1642 | struct bfd_link_info *link_info, |
1643 | bfd_boolean *again) | |
1644 | { | |
1645 | Elf_Internal_Shdr *symtab_hdr; | |
1646 | Elf_Internal_Rela *internal_relocs; | |
1647 | Elf_Internal_Rela *irel, *irelend; | |
1648 | bfd_byte *contents = NULL; | |
1649 | Elf_Internal_Sym *isymbuf = NULL; | |
28c9d252 NC |
1650 | struct elf32_avr_link_hash_table *htab; |
1651 | ||
c8a1f254 NS |
1652 | if (link_info->relocatable) |
1653 | (*link_info->callbacks->einfo) | |
1654 | (_("%P%F: --relax and -r may not be used together\n")); | |
1655 | ||
28c9d252 | 1656 | htab = avr_link_hash_table (link_info); |
64ee10b6 NC |
1657 | if (htab == NULL) |
1658 | return FALSE; | |
df406460 NC |
1659 | |
1660 | /* Assume nothing changes. */ | |
1661 | *again = FALSE; | |
1662 | ||
28c9d252 NC |
1663 | if ((!htab->no_stubs) && (sec == htab->stub_sec)) |
1664 | { | |
1665 | /* We are just relaxing the stub section. | |
1666 | Let's calculate the size needed again. */ | |
1667 | bfd_size_type last_estimated_stub_section_size = htab->stub_sec->size; | |
1668 | ||
1669 | if (debug_relax) | |
1670 | printf ("Relaxing the stub section. Size prior to this pass: %i\n", | |
1671 | (int) last_estimated_stub_section_size); | |
1672 | ||
1673 | elf32_avr_size_stubs (htab->stub_sec->output_section->owner, | |
1674 | link_info, FALSE); | |
1675 | ||
1676 | /* Check if the number of trampolines changed. */ | |
1677 | if (last_estimated_stub_section_size != htab->stub_sec->size) | |
1678 | *again = TRUE; | |
1679 | ||
1680 | if (debug_relax) | |
1681 | printf ("Size of stub section after this pass: %i\n", | |
1682 | (int) htab->stub_sec->size); | |
1683 | ||
1684 | return TRUE; | |
1685 | } | |
1686 | ||
df406460 NC |
1687 | /* We don't have to do anything for a relocatable link, if |
1688 | this section does not have relocs, or if this is not a | |
1689 | code section. */ | |
1690 | if (link_info->relocatable | |
1691 | || (sec->flags & SEC_RELOC) == 0 | |
1692 | || sec->reloc_count == 0 | |
1693 | || (sec->flags & SEC_CODE) == 0) | |
1694 | return TRUE; | |
4cdc7696 | 1695 | |
df406460 NC |
1696 | /* Check if the object file to relax uses internal symbols so that we |
1697 | could fix up the relocations. */ | |
df406460 NC |
1698 | if (!(elf_elfheader (abfd)->e_flags & EF_AVR_LINKRELAX_PREPARED)) |
1699 | return TRUE; | |
df406460 NC |
1700 | |
1701 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1702 | ||
1703 | /* Get a copy of the native relocations. */ | |
1704 | internal_relocs = (_bfd_elf_link_read_relocs | |
4cdc7696 | 1705 | (abfd, sec, NULL, NULL, link_info->keep_memory)); |
df406460 NC |
1706 | if (internal_relocs == NULL) |
1707 | goto error_return; | |
1708 | ||
df406460 NC |
1709 | /* Walk through the relocs looking for relaxing opportunities. */ |
1710 | irelend = internal_relocs + sec->reloc_count; | |
1711 | for (irel = internal_relocs; irel < irelend; irel++) | |
1712 | { | |
1713 | bfd_vma symval; | |
1714 | ||
4cdc7696 | 1715 | if ( ELF32_R_TYPE (irel->r_info) != R_AVR_13_PCREL |
91d6fa6a NC |
1716 | && ELF32_R_TYPE (irel->r_info) != R_AVR_7_PCREL |
1717 | && ELF32_R_TYPE (irel->r_info) != R_AVR_CALL) | |
df406460 | 1718 | continue; |
4cdc7696 | 1719 | |
df406460 NC |
1720 | /* Get the section contents if we haven't done so already. */ |
1721 | if (contents == NULL) | |
1722 | { | |
1723 | /* Get cached copy if it exists. */ | |
1724 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1725 | contents = elf_section_data (sec)->this_hdr.contents; | |
1726 | else | |
1727 | { | |
1728 | /* Go get them off disk. */ | |
4cdc7696 | 1729 | if (! bfd_malloc_and_get_section (abfd, sec, &contents)) |
df406460 NC |
1730 | goto error_return; |
1731 | } | |
1732 | } | |
1733 | ||
91d6fa6a | 1734 | /* Read this BFD's local symbols if we haven't done so already. */ |
df406460 NC |
1735 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) |
1736 | { | |
1737 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
1738 | if (isymbuf == NULL) | |
1739 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
1740 | symtab_hdr->sh_info, 0, | |
1741 | NULL, NULL, NULL); | |
1742 | if (isymbuf == NULL) | |
1743 | goto error_return; | |
1744 | } | |
1745 | ||
1746 | ||
1747 | /* Get the value of the symbol referred to by the reloc. */ | |
1748 | if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
1749 | { | |
1750 | /* A local symbol. */ | |
1751 | Elf_Internal_Sym *isym; | |
1752 | asection *sym_sec; | |
1753 | ||
1754 | isym = isymbuf + ELF32_R_SYM (irel->r_info); | |
1755 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
1756 | symval = isym->st_value; | |
1757 | /* If the reloc is absolute, it will not have | |
1758 | a symbol or section associated with it. */ | |
1759 | if (sym_sec) | |
1760 | symval += sym_sec->output_section->vma | |
1761 | + sym_sec->output_offset; | |
1762 | } | |
1763 | else | |
1764 | { | |
1765 | unsigned long indx; | |
1766 | struct elf_link_hash_entry *h; | |
1767 | ||
1768 | /* An external symbol. */ | |
1769 | indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info; | |
1770 | h = elf_sym_hashes (abfd)[indx]; | |
1771 | BFD_ASSERT (h != NULL); | |
1772 | if (h->root.type != bfd_link_hash_defined | |
1773 | && h->root.type != bfd_link_hash_defweak) | |
4cdc7696 NC |
1774 | /* This appears to be a reference to an undefined |
1775 | symbol. Just ignore it--it will be caught by the | |
1776 | regular reloc processing. */ | |
1777 | continue; | |
1778 | ||
df406460 NC |
1779 | symval = (h->root.u.def.value |
1780 | + h->root.u.def.section->output_section->vma | |
1781 | + h->root.u.def.section->output_offset); | |
1782 | } | |
1783 | ||
1784 | /* For simplicity of coding, we are going to modify the section | |
1785 | contents, the section relocs, and the BFD symbol table. We | |
1786 | must tell the rest of the code not to free up this | |
1787 | information. It would be possible to instead create a table | |
1788 | of changes which have to be made, as is done in coff-mips.c; | |
1789 | that would be more work, but would require less memory when | |
1790 | the linker is run. */ | |
1791 | switch (ELF32_R_TYPE (irel->r_info)) | |
1792 | { | |
91d6fa6a NC |
1793 | /* Try to turn a 22-bit absolute call/jump into an 13-bit |
1794 | pc-relative rcall/rjmp. */ | |
1795 | case R_AVR_CALL: | |
df406460 NC |
1796 | { |
1797 | bfd_vma value = symval + irel->r_addend; | |
1798 | bfd_vma dot, gap; | |
1799 | int distance_short_enough = 0; | |
1800 | ||
1801 | /* Get the address of this instruction. */ | |
1802 | dot = (sec->output_section->vma | |
1803 | + sec->output_offset + irel->r_offset); | |
1804 | ||
1805 | /* Compute the distance from this insn to the branch target. */ | |
1806 | gap = value - dot; | |
1807 | ||
1808 | /* If the distance is within -4094..+4098 inclusive, then we can | |
1809 | relax this jump/call. +4098 because the call/jump target | |
4cdc7696 | 1810 | will be closer after the relaxation. */ |
df406460 NC |
1811 | if ((int) gap >= -4094 && (int) gap <= 4098) |
1812 | distance_short_enough = 1; | |
1813 | ||
1814 | /* Here we handle the wrap-around case. E.g. for a 16k device | |
4cdc7696 | 1815 | we could use a rjmp to jump from address 0x100 to 0x3d00! |
df406460 NC |
1816 | In order to make this work properly, we need to fill the |
1817 | vaiable avr_pc_wrap_around with the appropriate value. | |
1818 | I.e. 0x4000 for a 16k device. */ | |
1819 | { | |
91d6fa6a NC |
1820 | /* Shrinking the code size makes the gaps larger in the |
1821 | case of wrap-arounds. So we use a heuristical safety | |
1822 | margin to avoid that during relax the distance gets | |
1823 | again too large for the short jumps. Let's assume | |
1824 | a typical code-size reduction due to relax for a | |
1825 | 16k device of 600 bytes. So let's use twice the | |
1826 | typical value as safety margin. */ | |
1827 | int rgap; | |
1828 | int safety_margin; | |
1829 | ||
1830 | int assumed_shrink = 600; | |
1831 | if (avr_pc_wrap_around > 0x4000) | |
1832 | assumed_shrink = 900; | |
1833 | ||
1834 | safety_margin = 2 * assumed_shrink; | |
1835 | ||
1836 | rgap = avr_relative_distance_considering_wrap_around (gap); | |
1837 | ||
1838 | if (rgap >= (-4092 + safety_margin) | |
1839 | && rgap <= (4094 - safety_margin)) | |
1840 | distance_short_enough = 1; | |
4cdc7696 | 1841 | } |
df406460 NC |
1842 | |
1843 | if (distance_short_enough) | |
1844 | { | |
1845 | unsigned char code_msb; | |
1846 | unsigned char code_lsb; | |
1847 | ||
28c9d252 | 1848 | if (debug_relax) |
df406460 NC |
1849 | printf ("shrinking jump/call instruction at address 0x%x" |
1850 | " in section %s\n\n", | |
1851 | (int) dot, sec->name); | |
1852 | ||
1853 | /* Note that we've changed the relocs, section contents, | |
1854 | etc. */ | |
1855 | elf_section_data (sec)->relocs = internal_relocs; | |
1856 | elf_section_data (sec)->this_hdr.contents = contents; | |
1857 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
1858 | ||
1859 | /* Get the instruction code for relaxing. */ | |
1860 | code_lsb = bfd_get_8 (abfd, contents + irel->r_offset); | |
1861 | code_msb = bfd_get_8 (abfd, contents + irel->r_offset + 1); | |
1862 | ||
1863 | /* Mask out the relocation bits. */ | |
1864 | code_msb &= 0x94; | |
1865 | code_lsb &= 0x0E; | |
1866 | if (code_msb == 0x94 && code_lsb == 0x0E) | |
1867 | { | |
1868 | /* we are changing call -> rcall . */ | |
1869 | bfd_put_8 (abfd, 0x00, contents + irel->r_offset); | |
1870 | bfd_put_8 (abfd, 0xD0, contents + irel->r_offset + 1); | |
1871 | } | |
1872 | else if (code_msb == 0x94 && code_lsb == 0x0C) | |
1873 | { | |
1874 | /* we are changeing jump -> rjmp. */ | |
1875 | bfd_put_8 (abfd, 0x00, contents + irel->r_offset); | |
1876 | bfd_put_8 (abfd, 0xC0, contents + irel->r_offset + 1); | |
1877 | } | |
4cdc7696 | 1878 | else |
df406460 NC |
1879 | abort (); |
1880 | ||
1881 | /* Fix the relocation's type. */ | |
1882 | irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info), | |
1883 | R_AVR_13_PCREL); | |
1884 | ||
1885 | /* Check for the vector section. There we don't want to | |
1886 | modify the ordering! */ | |
1887 | ||
1888 | if (!strcmp (sec->name,".vectors") | |
1889 | || !strcmp (sec->name,".jumptables")) | |
1890 | { | |
1891 | /* Let's insert a nop. */ | |
1892 | bfd_put_8 (abfd, 0x00, contents + irel->r_offset + 2); | |
1893 | bfd_put_8 (abfd, 0x00, contents + irel->r_offset + 3); | |
1894 | } | |
1895 | else | |
1896 | { | |
1897 | /* Delete two bytes of data. */ | |
1898 | if (!elf32_avr_relax_delete_bytes (abfd, sec, | |
1899 | irel->r_offset + 2, 2)) | |
1900 | goto error_return; | |
1901 | ||
1902 | /* That will change things, so, we should relax again. | |
1903 | Note that this is not required, and it may be slow. */ | |
1904 | *again = TRUE; | |
1905 | } | |
1906 | } | |
1907 | } | |
4cdc7696 | 1908 | |
df406460 NC |
1909 | default: |
1910 | { | |
1911 | unsigned char code_msb; | |
1912 | unsigned char code_lsb; | |
1913 | bfd_vma dot; | |
1914 | ||
1915 | code_msb = bfd_get_8 (abfd, contents + irel->r_offset + 1); | |
1916 | code_lsb = bfd_get_8 (abfd, contents + irel->r_offset + 0); | |
1917 | ||
1918 | /* Get the address of this instruction. */ | |
1919 | dot = (sec->output_section->vma | |
1920 | + sec->output_offset + irel->r_offset); | |
4cdc7696 NC |
1921 | |
1922 | /* Here we look for rcall/ret or call/ret sequences that could be | |
28c9d252 NC |
1923 | safely replaced by rjmp/ret or jmp/ret. */ |
1924 | if (((code_msb & 0xf0) == 0xd0) | |
1925 | && avr_replace_call_ret_sequences) | |
df406460 NC |
1926 | { |
1927 | /* This insn is a rcall. */ | |
1928 | unsigned char next_insn_msb = 0; | |
1929 | unsigned char next_insn_lsb = 0; | |
1930 | ||
1931 | if (irel->r_offset + 3 < sec->size) | |
1932 | { | |
4cdc7696 | 1933 | next_insn_msb = |
91d6fa6a | 1934 | bfd_get_8 (abfd, contents + irel->r_offset + 3); |
4cdc7696 | 1935 | next_insn_lsb = |
91d6fa6a | 1936 | bfd_get_8 (abfd, contents + irel->r_offset + 2); |
df406460 | 1937 | } |
4cdc7696 NC |
1938 | |
1939 | if ((0x95 == next_insn_msb) && (0x08 == next_insn_lsb)) | |
df406460 NC |
1940 | { |
1941 | /* The next insn is a ret. We now convert the rcall insn | |
1942 | into a rjmp instruction. */ | |
df406460 NC |
1943 | code_msb &= 0xef; |
1944 | bfd_put_8 (abfd, code_msb, contents + irel->r_offset + 1); | |
28c9d252 | 1945 | if (debug_relax) |
df406460 NC |
1946 | printf ("converted rcall/ret sequence at address 0x%x" |
1947 | " into rjmp/ret sequence. Section is %s\n\n", | |
1948 | (int) dot, sec->name); | |
1949 | *again = TRUE; | |
1950 | break; | |
1951 | } | |
1952 | } | |
1953 | else if ((0x94 == (code_msb & 0xfe)) | |
28c9d252 NC |
1954 | && (0x0e == (code_lsb & 0x0e)) |
1955 | && avr_replace_call_ret_sequences) | |
df406460 NC |
1956 | { |
1957 | /* This insn is a call. */ | |
1958 | unsigned char next_insn_msb = 0; | |
1959 | unsigned char next_insn_lsb = 0; | |
1960 | ||
1961 | if (irel->r_offset + 5 < sec->size) | |
1962 | { | |
1963 | next_insn_msb = | |
91d6fa6a | 1964 | bfd_get_8 (abfd, contents + irel->r_offset + 5); |
df406460 | 1965 | next_insn_lsb = |
91d6fa6a | 1966 | bfd_get_8 (abfd, contents + irel->r_offset + 4); |
df406460 | 1967 | } |
4cdc7696 | 1968 | |
df406460 NC |
1969 | if ((0x95 == next_insn_msb) && (0x08 == next_insn_lsb)) |
1970 | { | |
1971 | /* The next insn is a ret. We now convert the call insn | |
1972 | into a jmp instruction. */ | |
1973 | ||
1974 | code_lsb &= 0xfd; | |
1975 | bfd_put_8 (abfd, code_lsb, contents + irel->r_offset); | |
28c9d252 | 1976 | if (debug_relax) |
df406460 NC |
1977 | printf ("converted call/ret sequence at address 0x%x" |
1978 | " into jmp/ret sequence. Section is %s\n\n", | |
1979 | (int) dot, sec->name); | |
1980 | *again = TRUE; | |
1981 | break; | |
1982 | } | |
1983 | } | |
4cdc7696 NC |
1984 | else if ((0xc0 == (code_msb & 0xf0)) |
1985 | || ((0x94 == (code_msb & 0xfe)) | |
df406460 NC |
1986 | && (0x0c == (code_lsb & 0x0e)))) |
1987 | { | |
4cdc7696 | 1988 | /* This insn is a rjmp or a jmp. */ |
df406460 NC |
1989 | unsigned char next_insn_msb = 0; |
1990 | unsigned char next_insn_lsb = 0; | |
1991 | int insn_size; | |
1992 | ||
1993 | if (0xc0 == (code_msb & 0xf0)) | |
1994 | insn_size = 2; /* rjmp insn */ | |
1995 | else | |
1996 | insn_size = 4; /* jmp insn */ | |
1997 | ||
1998 | if (irel->r_offset + insn_size + 1 < sec->size) | |
1999 | { | |
4cdc7696 | 2000 | next_insn_msb = |
91d6fa6a NC |
2001 | bfd_get_8 (abfd, contents + irel->r_offset |
2002 | + insn_size + 1); | |
4cdc7696 | 2003 | next_insn_lsb = |
91d6fa6a NC |
2004 | bfd_get_8 (abfd, contents + irel->r_offset |
2005 | + insn_size); | |
df406460 NC |
2006 | } |
2007 | ||
2008 | if ((0x95 == next_insn_msb) && (0x08 == next_insn_lsb)) | |
2009 | { | |
2010 | /* The next insn is a ret. We possibly could delete | |
2011 | this ret. First we need to check for preceeding | |
2012 | sbis/sbic/sbrs or cpse "skip" instructions. */ | |
2013 | ||
2014 | int there_is_preceeding_non_skip_insn = 1; | |
2015 | bfd_vma address_of_ret; | |
2016 | ||
2017 | address_of_ret = dot + insn_size; | |
2018 | ||
28c9d252 | 2019 | if (debug_relax && (insn_size == 2)) |
4cdc7696 | 2020 | printf ("found rjmp / ret sequence at address 0x%x\n", |
df406460 | 2021 | (int) dot); |
28c9d252 | 2022 | if (debug_relax && (insn_size == 4)) |
4cdc7696 | 2023 | printf ("found jmp / ret sequence at address 0x%x\n", |
df406460 NC |
2024 | (int) dot); |
2025 | ||
2026 | /* We have to make sure that there is a preceeding insn. */ | |
2027 | if (irel->r_offset >= 2) | |
2028 | { | |
2029 | unsigned char preceeding_msb; | |
2030 | unsigned char preceeding_lsb; | |
4cdc7696 | 2031 | preceeding_msb = |
91d6fa6a | 2032 | bfd_get_8 (abfd, contents + irel->r_offset - 1); |
4cdc7696 | 2033 | preceeding_lsb = |
91d6fa6a | 2034 | bfd_get_8 (abfd, contents + irel->r_offset - 2); |
df406460 NC |
2035 | |
2036 | /* sbic. */ | |
4cdc7696 | 2037 | if (0x99 == preceeding_msb) |
df406460 NC |
2038 | there_is_preceeding_non_skip_insn = 0; |
2039 | ||
2040 | /* sbis. */ | |
4cdc7696 | 2041 | if (0x9b == preceeding_msb) |
df406460 NC |
2042 | there_is_preceeding_non_skip_insn = 0; |
2043 | ||
2044 | /* sbrc */ | |
2045 | if ((0xfc == (preceeding_msb & 0xfe) | |
91d6fa6a | 2046 | && (0x00 == (preceeding_lsb & 0x08)))) |
df406460 NC |
2047 | there_is_preceeding_non_skip_insn = 0; |
2048 | ||
4cdc7696 | 2049 | /* sbrs */ |
df406460 | 2050 | if ((0xfe == (preceeding_msb & 0xfe) |
91d6fa6a | 2051 | && (0x00 == (preceeding_lsb & 0x08)))) |
df406460 | 2052 | there_is_preceeding_non_skip_insn = 0; |
4cdc7696 | 2053 | |
df406460 NC |
2054 | /* cpse */ |
2055 | if (0x10 == (preceeding_msb & 0xfc)) | |
2056 | there_is_preceeding_non_skip_insn = 0; | |
4cdc7696 | 2057 | |
df406460 | 2058 | if (there_is_preceeding_non_skip_insn == 0) |
28c9d252 | 2059 | if (debug_relax) |
df406460 NC |
2060 | printf ("preceeding skip insn prevents deletion of" |
2061 | " ret insn at addr 0x%x in section %s\n", | |
2062 | (int) dot + 2, sec->name); | |
2063 | } | |
2064 | else | |
2065 | { | |
2066 | /* There is no previous instruction. */ | |
2067 | there_is_preceeding_non_skip_insn = 0; | |
4cdc7696 | 2068 | } |
df406460 NC |
2069 | |
2070 | if (there_is_preceeding_non_skip_insn) | |
2071 | { | |
2072 | /* We now only have to make sure that there is no | |
2073 | local label defined at the address of the ret | |
2074 | instruction and that there is no local relocation | |
2075 | in this section pointing to the ret. */ | |
2076 | ||
2077 | int deleting_ret_is_safe = 1; | |
4cdc7696 | 2078 | unsigned int section_offset_of_ret_insn = |
91d6fa6a | 2079 | irel->r_offset + insn_size; |
df406460 NC |
2080 | Elf_Internal_Sym *isym, *isymend; |
2081 | unsigned int sec_shndx; | |
4cdc7696 NC |
2082 | |
2083 | sec_shndx = | |
2084 | _bfd_elf_section_from_bfd_section (abfd, sec); | |
df406460 NC |
2085 | |
2086 | /* Check for local symbols. */ | |
2087 | isym = (Elf_Internal_Sym *) symtab_hdr->contents; | |
2088 | isymend = isym + symtab_hdr->sh_info; | |
696b7ad2 NC |
2089 | /* PR 6019: There may not be any local symbols. */ |
2090 | for (; isym != NULL && isym < isymend; isym++) | |
91d6fa6a NC |
2091 | { |
2092 | if (isym->st_value == section_offset_of_ret_insn | |
2093 | && isym->st_shndx == sec_shndx) | |
2094 | { | |
2095 | deleting_ret_is_safe = 0; | |
2096 | if (debug_relax) | |
2097 | printf ("local label prevents deletion of ret " | |
2098 | "insn at address 0x%x\n", | |
2099 | (int) dot + insn_size); | |
2100 | } | |
2101 | } | |
2102 | ||
2103 | /* Now check for global symbols. */ | |
2104 | { | |
2105 | int symcount; | |
2106 | struct elf_link_hash_entry **sym_hashes; | |
2107 | struct elf_link_hash_entry **end_hashes; | |
2108 | ||
2109 | symcount = (symtab_hdr->sh_size | |
2110 | / sizeof (Elf32_External_Sym) | |
2111 | - symtab_hdr->sh_info); | |
2112 | sym_hashes = elf_sym_hashes (abfd); | |
2113 | end_hashes = sym_hashes + symcount; | |
2114 | for (; sym_hashes < end_hashes; sym_hashes++) | |
2115 | { | |
2116 | struct elf_link_hash_entry *sym_hash = | |
2117 | *sym_hashes; | |
2118 | if ((sym_hash->root.type == bfd_link_hash_defined | |
2119 | || sym_hash->root.type == | |
4cdc7696 | 2120 | bfd_link_hash_defweak) |
91d6fa6a NC |
2121 | && sym_hash->root.u.def.section == sec |
2122 | && sym_hash->root.u.def.value == section_offset_of_ret_insn) | |
2123 | { | |
2124 | deleting_ret_is_safe = 0; | |
2125 | if (debug_relax) | |
2126 | printf ("global label prevents deletion of " | |
2127 | "ret insn at address 0x%x\n", | |
2128 | (int) dot + insn_size); | |
2129 | } | |
2130 | } | |
2131 | } | |
2132 | /* Now we check for relocations pointing to ret. */ | |
2133 | { | |
2134 | Elf_Internal_Rela *rel; | |
2135 | Elf_Internal_Rela *relend; | |
2136 | ||
2137 | relend = elf_section_data (sec)->relocs | |
2138 | + sec->reloc_count; | |
2139 | ||
2140 | for (rel = elf_section_data (sec)->relocs; | |
2141 | rel < relend; rel++) | |
2142 | { | |
2143 | bfd_vma reloc_target = 0; | |
2144 | ||
2145 | /* Read this BFD's local symbols if we haven't | |
2146 | done so already. */ | |
2147 | if (isymbuf == NULL && symtab_hdr->sh_info != 0) | |
2148 | { | |
2149 | isymbuf = (Elf_Internal_Sym *) | |
2150 | symtab_hdr->contents; | |
2151 | if (isymbuf == NULL) | |
2152 | isymbuf = bfd_elf_get_elf_syms | |
2153 | (abfd, | |
2154 | symtab_hdr, | |
2155 | symtab_hdr->sh_info, 0, | |
2156 | NULL, NULL, NULL); | |
2157 | if (isymbuf == NULL) | |
2158 | break; | |
2159 | } | |
2160 | ||
2161 | /* Get the value of the symbol referred to | |
2162 | by the reloc. */ | |
2163 | if (ELF32_R_SYM (rel->r_info) | |
2164 | < symtab_hdr->sh_info) | |
2165 | { | |
2166 | /* A local symbol. */ | |
2167 | asection *sym_sec; | |
2168 | ||
2169 | isym = isymbuf | |
2170 | + ELF32_R_SYM (rel->r_info); | |
2171 | sym_sec = bfd_section_from_elf_index | |
2172 | (abfd, isym->st_shndx); | |
2173 | symval = isym->st_value; | |
2174 | ||
2175 | /* If the reloc is absolute, it will not | |
2176 | have a symbol or section associated | |
2177 | with it. */ | |
2178 | ||
2179 | if (sym_sec) | |
2180 | { | |
2181 | symval += | |
2182 | sym_sec->output_section->vma | |
2183 | + sym_sec->output_offset; | |
2184 | reloc_target = symval + rel->r_addend; | |
2185 | } | |
2186 | else | |
2187 | { | |
2188 | reloc_target = symval + rel->r_addend; | |
2189 | /* Reference symbol is absolute. */ | |
2190 | } | |
2191 | } | |
2192 | /* else ... reference symbol is extern. */ | |
2193 | ||
2194 | if (address_of_ret == reloc_target) | |
2195 | { | |
2196 | deleting_ret_is_safe = 0; | |
2197 | if (debug_relax) | |
2198 | printf ("ret from " | |
2199 | "rjmp/jmp ret sequence at address" | |
2200 | " 0x%x could not be deleted. ret" | |
2201 | " is target of a relocation.\n", | |
2202 | (int) address_of_ret); | |
2203 | } | |
2204 | } | |
2205 | } | |
2206 | ||
2207 | if (deleting_ret_is_safe) | |
2208 | { | |
2209 | if (debug_relax) | |
2210 | printf ("unreachable ret instruction " | |
2211 | "at address 0x%x deleted.\n", | |
2212 | (int) dot + insn_size); | |
2213 | ||
2214 | /* Delete two bytes of data. */ | |
2215 | if (!elf32_avr_relax_delete_bytes (abfd, sec, | |
2216 | irel->r_offset + insn_size, 2)) | |
2217 | goto error_return; | |
2218 | ||
2219 | /* That will change things, so, we should relax | |
2220 | again. Note that this is not required, and it | |
2221 | may be slow. */ | |
2222 | *again = TRUE; | |
2223 | break; | |
2224 | } | |
df406460 | 2225 | } |
4cdc7696 NC |
2226 | |
2227 | } | |
2228 | } | |
df406460 NC |
2229 | break; |
2230 | } | |
2231 | } | |
2232 | } | |
2233 | ||
2234 | if (contents != NULL | |
2235 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2236 | { | |
2237 | if (! link_info->keep_memory) | |
2238 | free (contents); | |
2239 | else | |
2240 | { | |
2241 | /* Cache the section contents for elf_link_input_bfd. */ | |
2242 | elf_section_data (sec)->this_hdr.contents = contents; | |
2243 | } | |
2244 | } | |
2245 | ||
2246 | if (internal_relocs != NULL | |
2247 | && elf_section_data (sec)->relocs != internal_relocs) | |
2248 | free (internal_relocs); | |
2249 | ||
2250 | return TRUE; | |
2251 | ||
2252 | error_return: | |
2253 | if (isymbuf != NULL | |
2254 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
2255 | free (isymbuf); | |
2256 | if (contents != NULL | |
2257 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2258 | free (contents); | |
2259 | if (internal_relocs != NULL | |
2260 | && elf_section_data (sec)->relocs != internal_relocs) | |
2261 | free (internal_relocs); | |
2262 | ||
4cdc7696 | 2263 | return FALSE; |
df406460 NC |
2264 | } |
2265 | ||
2266 | /* This is a version of bfd_generic_get_relocated_section_contents | |
4cdc7696 | 2267 | which uses elf32_avr_relocate_section. |
df406460 | 2268 | |
4cdc7696 | 2269 | For avr it's essentially a cut and paste taken from the H8300 port. |
df406460 | 2270 | The author of the relaxation support patch for avr had absolutely no |
4cdc7696 | 2271 | clue what is happening here but found out that this part of the code |
df406460 NC |
2272 | seems to be important. */ |
2273 | ||
2274 | static bfd_byte * | |
2275 | elf32_avr_get_relocated_section_contents (bfd *output_bfd, | |
2276 | struct bfd_link_info *link_info, | |
2277 | struct bfd_link_order *link_order, | |
2278 | bfd_byte *data, | |
2279 | bfd_boolean relocatable, | |
2280 | asymbol **symbols) | |
2281 | { | |
2282 | Elf_Internal_Shdr *symtab_hdr; | |
2283 | asection *input_section = link_order->u.indirect.section; | |
2284 | bfd *input_bfd = input_section->owner; | |
2285 | asection **sections = NULL; | |
2286 | Elf_Internal_Rela *internal_relocs = NULL; | |
2287 | Elf_Internal_Sym *isymbuf = NULL; | |
2288 | ||
2289 | /* We only need to handle the case of relaxing, or of having a | |
2290 | particular set of section contents, specially. */ | |
2291 | if (relocatable | |
2292 | || elf_section_data (input_section)->this_hdr.contents == NULL) | |
2293 | return bfd_generic_get_relocated_section_contents (output_bfd, link_info, | |
2294 | link_order, data, | |
2295 | relocatable, | |
2296 | symbols); | |
2297 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
2298 | ||
2299 | memcpy (data, elf_section_data (input_section)->this_hdr.contents, | |
2300 | (size_t) input_section->size); | |
2301 | ||
2302 | if ((input_section->flags & SEC_RELOC) != 0 | |
2303 | && input_section->reloc_count > 0) | |
2304 | { | |
2305 | asection **secpp; | |
2306 | Elf_Internal_Sym *isym, *isymend; | |
2307 | bfd_size_type amt; | |
2308 | ||
2309 | internal_relocs = (_bfd_elf_link_read_relocs | |
4cdc7696 | 2310 | (input_bfd, input_section, NULL, NULL, FALSE)); |
df406460 NC |
2311 | if (internal_relocs == NULL) |
2312 | goto error_return; | |
2313 | ||
2314 | if (symtab_hdr->sh_info != 0) | |
2315 | { | |
2316 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
2317 | if (isymbuf == NULL) | |
2318 | isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, | |
2319 | symtab_hdr->sh_info, 0, | |
2320 | NULL, NULL, NULL); | |
2321 | if (isymbuf == NULL) | |
2322 | goto error_return; | |
2323 | } | |
2324 | ||
2325 | amt = symtab_hdr->sh_info; | |
2326 | amt *= sizeof (asection *); | |
4cdc7696 | 2327 | sections = bfd_malloc (amt); |
df406460 NC |
2328 | if (sections == NULL && amt != 0) |
2329 | goto error_return; | |
2330 | ||
2331 | isymend = isymbuf + symtab_hdr->sh_info; | |
2332 | for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp) | |
2333 | { | |
2334 | asection *isec; | |
2335 | ||
2336 | if (isym->st_shndx == SHN_UNDEF) | |
2337 | isec = bfd_und_section_ptr; | |
2338 | else if (isym->st_shndx == SHN_ABS) | |
2339 | isec = bfd_abs_section_ptr; | |
2340 | else if (isym->st_shndx == SHN_COMMON) | |
2341 | isec = bfd_com_section_ptr; | |
2342 | else | |
2343 | isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx); | |
2344 | ||
2345 | *secpp = isec; | |
2346 | } | |
2347 | ||
2348 | if (! elf32_avr_relocate_section (output_bfd, link_info, input_bfd, | |
2349 | input_section, data, internal_relocs, | |
2350 | isymbuf, sections)) | |
2351 | goto error_return; | |
2352 | ||
2353 | if (sections != NULL) | |
2354 | free (sections); | |
2355 | if (isymbuf != NULL | |
2356 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
2357 | free (isymbuf); | |
2358 | if (elf_section_data (input_section)->relocs != internal_relocs) | |
2359 | free (internal_relocs); | |
2360 | } | |
2361 | ||
2362 | return data; | |
2363 | ||
2364 | error_return: | |
2365 | if (sections != NULL) | |
2366 | free (sections); | |
2367 | if (isymbuf != NULL | |
2368 | && symtab_hdr->contents != (unsigned char *) isymbuf) | |
2369 | free (isymbuf); | |
2370 | if (internal_relocs != NULL | |
2371 | && elf_section_data (input_section)->relocs != internal_relocs) | |
2372 | free (internal_relocs); | |
2373 | return NULL; | |
2374 | } | |
2375 | ||
2376 | ||
28c9d252 NC |
2377 | /* Determines the hash entry name for a particular reloc. It consists of |
2378 | the identifier of the symbol section and the added reloc addend and | |
2379 | symbol offset relative to the section the symbol is attached to. */ | |
2380 | ||
2381 | static char * | |
2382 | avr_stub_name (const asection *symbol_section, | |
2383 | const bfd_vma symbol_offset, | |
2384 | const Elf_Internal_Rela *rela) | |
2385 | { | |
2386 | char *stub_name; | |
2387 | bfd_size_type len; | |
2388 | ||
2389 | len = 8 + 1 + 8 + 1 + 1; | |
2390 | stub_name = bfd_malloc (len); | |
2391 | ||
2392 | sprintf (stub_name, "%08x+%08x", | |
2393 | symbol_section->id & 0xffffffff, | |
2394 | (unsigned int) ((rela->r_addend & 0xffffffff) + symbol_offset)); | |
2395 | ||
2396 | return stub_name; | |
2397 | } | |
2398 | ||
2399 | ||
2400 | /* Add a new stub entry to the stub hash. Not all fields of the new | |
2401 | stub entry are initialised. */ | |
2402 | ||
2403 | static struct elf32_avr_stub_hash_entry * | |
2404 | avr_add_stub (const char *stub_name, | |
2405 | struct elf32_avr_link_hash_table *htab) | |
2406 | { | |
2407 | struct elf32_avr_stub_hash_entry *hsh; | |
2408 | ||
2409 | /* Enter this entry into the linker stub hash table. */ | |
2410 | hsh = avr_stub_hash_lookup (&htab->bstab, stub_name, TRUE, FALSE); | |
2411 | ||
2412 | if (hsh == NULL) | |
2413 | { | |
2414 | (*_bfd_error_handler) (_("%B: cannot create stub entry %s"), | |
2415 | NULL, stub_name); | |
2416 | return NULL; | |
2417 | } | |
2418 | ||
2419 | hsh->stub_offset = 0; | |
2420 | return hsh; | |
2421 | } | |
2422 | ||
2423 | /* We assume that there is already space allocated for the stub section | |
2424 | contents and that before building the stubs the section size is | |
2425 | initialized to 0. We assume that within the stub hash table entry, | |
2426 | the absolute position of the jmp target has been written in the | |
2427 | target_value field. We write here the offset of the generated jmp insn | |
2428 | relative to the trampoline section start to the stub_offset entry in | |
2429 | the stub hash table entry. */ | |
2430 | ||
2431 | static bfd_boolean | |
2432 | avr_build_one_stub (struct bfd_hash_entry *bh, void *in_arg) | |
2433 | { | |
2434 | struct elf32_avr_stub_hash_entry *hsh; | |
2435 | struct bfd_link_info *info; | |
2436 | struct elf32_avr_link_hash_table *htab; | |
2437 | bfd *stub_bfd; | |
2438 | bfd_byte *loc; | |
2439 | bfd_vma target; | |
2440 | bfd_vma starget; | |
2441 | ||
2442 | /* Basic opcode */ | |
2443 | bfd_vma jmp_insn = 0x0000940c; | |
2444 | ||
2445 | /* Massage our args to the form they really have. */ | |
2446 | hsh = avr_stub_hash_entry (bh); | |
2447 | ||
2448 | if (!hsh->is_actually_needed) | |
2449 | return TRUE; | |
2450 | ||
2451 | info = (struct bfd_link_info *) in_arg; | |
2452 | ||
2453 | htab = avr_link_hash_table (info); | |
64ee10b6 NC |
2454 | if (htab == NULL) |
2455 | return FALSE; | |
28c9d252 NC |
2456 | |
2457 | target = hsh->target_value; | |
2458 | ||
2459 | /* Make a note of the offset within the stubs for this entry. */ | |
2460 | hsh->stub_offset = htab->stub_sec->size; | |
2461 | loc = htab->stub_sec->contents + hsh->stub_offset; | |
2462 | ||
2463 | stub_bfd = htab->stub_sec->owner; | |
2464 | ||
2465 | if (debug_stubs) | |
2466 | printf ("Building one Stub. Address: 0x%x, Offset: 0x%x\n", | |
2467 | (unsigned int) target, | |
2468 | (unsigned int) hsh->stub_offset); | |
2469 | ||
2470 | /* We now have to add the information on the jump target to the bare | |
2471 | opcode bits already set in jmp_insn. */ | |
2472 | ||
2473 | /* Check for the alignment of the address. */ | |
2474 | if (target & 1) | |
2475 | return FALSE; | |
2476 | ||
2477 | starget = target >> 1; | |
2478 | jmp_insn |= ((starget & 0x10000) | ((starget << 3) & 0x1f00000)) >> 16; | |
2479 | bfd_put_16 (stub_bfd, jmp_insn, loc); | |
2480 | bfd_put_16 (stub_bfd, (bfd_vma) starget & 0xffff, loc + 2); | |
2481 | ||
2482 | htab->stub_sec->size += 4; | |
2483 | ||
2484 | /* Now add the entries in the address mapping table if there is still | |
2485 | space left. */ | |
2486 | { | |
2487 | unsigned int nr; | |
2488 | ||
2489 | nr = htab->amt_entry_cnt + 1; | |
2490 | if (nr <= htab->amt_max_entry_cnt) | |
2491 | { | |
2492 | htab->amt_entry_cnt = nr; | |
2493 | ||
2494 | htab->amt_stub_offsets[nr - 1] = hsh->stub_offset; | |
2495 | htab->amt_destination_addr[nr - 1] = target; | |
2496 | } | |
2497 | } | |
2498 | ||
2499 | return TRUE; | |
2500 | } | |
2501 | ||
2502 | static bfd_boolean | |
2503 | avr_mark_stub_not_to_be_necessary (struct bfd_hash_entry *bh, | |
c7e2358a | 2504 | void *in_arg ATTRIBUTE_UNUSED) |
28c9d252 NC |
2505 | { |
2506 | struct elf32_avr_stub_hash_entry *hsh; | |
28c9d252 | 2507 | |
28c9d252 NC |
2508 | hsh = avr_stub_hash_entry (bh); |
2509 | hsh->is_actually_needed = FALSE; | |
2510 | ||
2511 | return TRUE; | |
2512 | } | |
2513 | ||
2514 | static bfd_boolean | |
2515 | avr_size_one_stub (struct bfd_hash_entry *bh, void *in_arg) | |
2516 | { | |
2517 | struct elf32_avr_stub_hash_entry *hsh; | |
2518 | struct elf32_avr_link_hash_table *htab; | |
2519 | int size; | |
2520 | ||
2521 | /* Massage our args to the form they really have. */ | |
2522 | hsh = avr_stub_hash_entry (bh); | |
2523 | htab = in_arg; | |
2524 | ||
2525 | if (hsh->is_actually_needed) | |
2526 | size = 4; | |
2527 | else | |
2528 | size = 0; | |
2529 | ||
2530 | htab->stub_sec->size += size; | |
2531 | return TRUE; | |
2532 | } | |
2533 | ||
2534 | void | |
2535 | elf32_avr_setup_params (struct bfd_link_info *info, | |
2536 | bfd *avr_stub_bfd, | |
2537 | asection *avr_stub_section, | |
2538 | bfd_boolean no_stubs, | |
2539 | bfd_boolean deb_stubs, | |
2540 | bfd_boolean deb_relax, | |
2541 | bfd_vma pc_wrap_around, | |
2542 | bfd_boolean call_ret_replacement) | |
2543 | { | |
64ee10b6 | 2544 | struct elf32_avr_link_hash_table *htab = avr_link_hash_table (info); |
28c9d252 | 2545 | |
64ee10b6 NC |
2546 | if (htab == NULL) |
2547 | return; | |
28c9d252 NC |
2548 | htab->stub_sec = avr_stub_section; |
2549 | htab->stub_bfd = avr_stub_bfd; | |
2550 | htab->no_stubs = no_stubs; | |
2551 | ||
2552 | debug_relax = deb_relax; | |
2553 | debug_stubs = deb_stubs; | |
2554 | avr_pc_wrap_around = pc_wrap_around; | |
2555 | avr_replace_call_ret_sequences = call_ret_replacement; | |
2556 | } | |
2557 | ||
2558 | ||
2559 | /* Set up various things so that we can make a list of input sections | |
2560 | for each output section included in the link. Returns -1 on error, | |
2561 | 0 when no stubs will be needed, and 1 on success. It also sets | |
2562 | information on the stubs bfd and the stub section in the info | |
2563 | struct. */ | |
2564 | ||
2565 | int | |
2566 | elf32_avr_setup_section_lists (bfd *output_bfd, | |
2567 | struct bfd_link_info *info) | |
2568 | { | |
2569 | bfd *input_bfd; | |
2570 | unsigned int bfd_count; | |
2571 | int top_id, top_index; | |
2572 | asection *section; | |
2573 | asection **input_list, **list; | |
2574 | bfd_size_type amt; | |
4dfe6ac6 | 2575 | struct elf32_avr_link_hash_table *htab = avr_link_hash_table (info); |
28c9d252 | 2576 | |
64ee10b6 | 2577 | if (htab == NULL || htab->no_stubs) |
28c9d252 NC |
2578 | return 0; |
2579 | ||
2580 | /* Count the number of input BFDs and find the top input section id. */ | |
2581 | for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0; | |
2582 | input_bfd != NULL; | |
2583 | input_bfd = input_bfd->link_next) | |
2584 | { | |
2585 | bfd_count += 1; | |
2586 | for (section = input_bfd->sections; | |
2587 | section != NULL; | |
2588 | section = section->next) | |
2589 | if (top_id < section->id) | |
2590 | top_id = section->id; | |
2591 | } | |
2592 | ||
2593 | htab->bfd_count = bfd_count; | |
2594 | ||
2595 | /* We can't use output_bfd->section_count here to find the top output | |
2596 | section index as some sections may have been removed, and | |
2597 | strip_excluded_output_sections doesn't renumber the indices. */ | |
2598 | for (section = output_bfd->sections, top_index = 0; | |
2599 | section != NULL; | |
2600 | section = section->next) | |
2601 | if (top_index < section->index) | |
2602 | top_index = section->index; | |
2603 | ||
2604 | htab->top_index = top_index; | |
2605 | amt = sizeof (asection *) * (top_index + 1); | |
2606 | input_list = bfd_malloc (amt); | |
2607 | htab->input_list = input_list; | |
2608 | if (input_list == NULL) | |
2609 | return -1; | |
2610 | ||
2611 | /* For sections we aren't interested in, mark their entries with a | |
2612 | value we can check later. */ | |
2613 | list = input_list + top_index; | |
2614 | do | |
2615 | *list = bfd_abs_section_ptr; | |
2616 | while (list-- != input_list); | |
2617 | ||
2618 | for (section = output_bfd->sections; | |
2619 | section != NULL; | |
2620 | section = section->next) | |
2621 | if ((section->flags & SEC_CODE) != 0) | |
2622 | input_list[section->index] = NULL; | |
2623 | ||
2624 | return 1; | |
2625 | } | |
2626 | ||
2627 | ||
2628 | /* Read in all local syms for all input bfds, and create hash entries | |
2629 | for export stubs if we are building a multi-subspace shared lib. | |
2630 | Returns -1 on error, 0 otherwise. */ | |
2631 | ||
2632 | static int | |
2633 | get_local_syms (bfd *input_bfd, struct bfd_link_info *info) | |
2634 | { | |
2635 | unsigned int bfd_indx; | |
2636 | Elf_Internal_Sym *local_syms, **all_local_syms; | |
2637 | struct elf32_avr_link_hash_table *htab = avr_link_hash_table (info); | |
9a008db3 | 2638 | bfd_size_type amt; |
28c9d252 | 2639 | |
64ee10b6 NC |
2640 | if (htab == NULL) |
2641 | return -1; | |
2642 | ||
28c9d252 NC |
2643 | /* We want to read in symbol extension records only once. To do this |
2644 | we need to read in the local symbols in parallel and save them for | |
2645 | later use; so hold pointers to the local symbols in an array. */ | |
9a008db3 | 2646 | amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count; |
28c9d252 NC |
2647 | all_local_syms = bfd_zmalloc (amt); |
2648 | htab->all_local_syms = all_local_syms; | |
2649 | if (all_local_syms == NULL) | |
2650 | return -1; | |
2651 | ||
2652 | /* Walk over all the input BFDs, swapping in local symbols. | |
2653 | If we are creating a shared library, create hash entries for the | |
2654 | export stubs. */ | |
2655 | for (bfd_indx = 0; | |
2656 | input_bfd != NULL; | |
2657 | input_bfd = input_bfd->link_next, bfd_indx++) | |
2658 | { | |
2659 | Elf_Internal_Shdr *symtab_hdr; | |
2660 | ||
2661 | /* We'll need the symbol table in a second. */ | |
2662 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
2663 | if (symtab_hdr->sh_info == 0) | |
2664 | continue; | |
2665 | ||
2666 | /* We need an array of the local symbols attached to the input bfd. */ | |
2667 | local_syms = (Elf_Internal_Sym *) symtab_hdr->contents; | |
2668 | if (local_syms == NULL) | |
2669 | { | |
2670 | local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr, | |
2671 | symtab_hdr->sh_info, 0, | |
2672 | NULL, NULL, NULL); | |
2673 | /* Cache them for elf_link_input_bfd. */ | |
2674 | symtab_hdr->contents = (unsigned char *) local_syms; | |
2675 | } | |
2676 | if (local_syms == NULL) | |
2677 | return -1; | |
2678 | ||
2679 | all_local_syms[bfd_indx] = local_syms; | |
2680 | } | |
2681 | ||
2682 | return 0; | |
2683 | } | |
2684 | ||
2685 | #define ADD_DUMMY_STUBS_FOR_DEBUGGING 0 | |
2686 | ||
2687 | bfd_boolean | |
2688 | elf32_avr_size_stubs (bfd *output_bfd, | |
2689 | struct bfd_link_info *info, | |
2690 | bfd_boolean is_prealloc_run) | |
2691 | { | |
64ee10b6 NC |
2692 | struct elf32_avr_link_hash_table *htab; |
2693 | int stub_changed = 0; | |
28c9d252 | 2694 | |
64ee10b6 NC |
2695 | htab = avr_link_hash_table (info); |
2696 | if (htab == NULL) | |
2697 | return FALSE; | |
28c9d252 | 2698 | |
64ee10b6 NC |
2699 | /* At this point we initialize htab->vector_base |
2700 | To the start of the text output section. */ | |
2701 | htab->vector_base = htab->stub_sec->output_section->vma; | |
28c9d252 | 2702 | |
64ee10b6 NC |
2703 | if (get_local_syms (info->input_bfds, info)) |
2704 | { | |
2705 | if (htab->all_local_syms) | |
2706 | goto error_ret_free_local; | |
2707 | return FALSE; | |
2708 | } | |
28c9d252 NC |
2709 | |
2710 | if (ADD_DUMMY_STUBS_FOR_DEBUGGING) | |
2711 | { | |
2712 | struct elf32_avr_stub_hash_entry *test; | |
2713 | ||
2714 | test = avr_add_stub ("Hugo",htab); | |
2715 | test->target_value = 0x123456; | |
2716 | test->stub_offset = 13; | |
2717 | ||
2718 | test = avr_add_stub ("Hugo2",htab); | |
2719 | test->target_value = 0x84210; | |
2720 | test->stub_offset = 14; | |
2721 | } | |
2722 | ||
2723 | while (1) | |
2724 | { | |
2725 | bfd *input_bfd; | |
2726 | unsigned int bfd_indx; | |
2727 | ||
2728 | /* We will have to re-generate the stub hash table each time anything | |
2729 | in memory has changed. */ | |
2730 | ||
2731 | bfd_hash_traverse (&htab->bstab, avr_mark_stub_not_to_be_necessary, htab); | |
2732 | for (input_bfd = info->input_bfds, bfd_indx = 0; | |
2733 | input_bfd != NULL; | |
2734 | input_bfd = input_bfd->link_next, bfd_indx++) | |
2735 | { | |
2736 | Elf_Internal_Shdr *symtab_hdr; | |
2737 | asection *section; | |
2738 | Elf_Internal_Sym *local_syms; | |
2739 | ||
2740 | /* We'll need the symbol table in a second. */ | |
2741 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
2742 | if (symtab_hdr->sh_info == 0) | |
2743 | continue; | |
2744 | ||
2745 | local_syms = htab->all_local_syms[bfd_indx]; | |
2746 | ||
2747 | /* Walk over each section attached to the input bfd. */ | |
2748 | for (section = input_bfd->sections; | |
2749 | section != NULL; | |
2750 | section = section->next) | |
2751 | { | |
2752 | Elf_Internal_Rela *internal_relocs, *irelaend, *irela; | |
2753 | ||
2754 | /* If there aren't any relocs, then there's nothing more | |
2755 | to do. */ | |
2756 | if ((section->flags & SEC_RELOC) == 0 | |
2757 | || section->reloc_count == 0) | |
2758 | continue; | |
2759 | ||
2760 | /* If this section is a link-once section that will be | |
2761 | discarded, then don't create any stubs. */ | |
2762 | if (section->output_section == NULL | |
2763 | || section->output_section->owner != output_bfd) | |
2764 | continue; | |
2765 | ||
2766 | /* Get the relocs. */ | |
2767 | internal_relocs | |
2768 | = _bfd_elf_link_read_relocs (input_bfd, section, NULL, NULL, | |
2769 | info->keep_memory); | |
2770 | if (internal_relocs == NULL) | |
2771 | goto error_ret_free_local; | |
2772 | ||
2773 | /* Now examine each relocation. */ | |
2774 | irela = internal_relocs; | |
2775 | irelaend = irela + section->reloc_count; | |
2776 | for (; irela < irelaend; irela++) | |
2777 | { | |
2778 | unsigned int r_type, r_indx; | |
2779 | struct elf32_avr_stub_hash_entry *hsh; | |
2780 | asection *sym_sec; | |
2781 | bfd_vma sym_value; | |
2782 | bfd_vma destination; | |
2783 | struct elf_link_hash_entry *hh; | |
2784 | char *stub_name; | |
2785 | ||
2786 | r_type = ELF32_R_TYPE (irela->r_info); | |
2787 | r_indx = ELF32_R_SYM (irela->r_info); | |
2788 | ||
2789 | /* Only look for 16 bit GS relocs. No other reloc will need a | |
2790 | stub. */ | |
2791 | if (!((r_type == R_AVR_16_PM) | |
2792 | || (r_type == R_AVR_LO8_LDI_GS) | |
2793 | || (r_type == R_AVR_HI8_LDI_GS))) | |
2794 | continue; | |
2795 | ||
2796 | /* Now determine the call target, its name, value, | |
2797 | section. */ | |
2798 | sym_sec = NULL; | |
2799 | sym_value = 0; | |
2800 | destination = 0; | |
2801 | hh = NULL; | |
2802 | if (r_indx < symtab_hdr->sh_info) | |
2803 | { | |
2804 | /* It's a local symbol. */ | |
2805 | Elf_Internal_Sym *sym; | |
2806 | Elf_Internal_Shdr *hdr; | |
4fbb74a6 | 2807 | unsigned int shndx; |
28c9d252 NC |
2808 | |
2809 | sym = local_syms + r_indx; | |
28c9d252 NC |
2810 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) |
2811 | sym_value = sym->st_value; | |
4fbb74a6 AM |
2812 | shndx = sym->st_shndx; |
2813 | if (shndx < elf_numsections (input_bfd)) | |
2814 | { | |
2815 | hdr = elf_elfsections (input_bfd)[shndx]; | |
2816 | sym_sec = hdr->bfd_section; | |
2817 | destination = (sym_value + irela->r_addend | |
2818 | + sym_sec->output_offset | |
2819 | + sym_sec->output_section->vma); | |
2820 | } | |
28c9d252 NC |
2821 | } |
2822 | else | |
2823 | { | |
2824 | /* It's an external symbol. */ | |
2825 | int e_indx; | |
2826 | ||
2827 | e_indx = r_indx - symtab_hdr->sh_info; | |
2828 | hh = elf_sym_hashes (input_bfd)[e_indx]; | |
2829 | ||
2830 | while (hh->root.type == bfd_link_hash_indirect | |
2831 | || hh->root.type == bfd_link_hash_warning) | |
2832 | hh = (struct elf_link_hash_entry *) | |
2833 | (hh->root.u.i.link); | |
2834 | ||
2835 | if (hh->root.type == bfd_link_hash_defined | |
2836 | || hh->root.type == bfd_link_hash_defweak) | |
2837 | { | |
2838 | sym_sec = hh->root.u.def.section; | |
2839 | sym_value = hh->root.u.def.value; | |
2840 | if (sym_sec->output_section != NULL) | |
2841 | destination = (sym_value + irela->r_addend | |
2842 | + sym_sec->output_offset | |
2843 | + sym_sec->output_section->vma); | |
2844 | } | |
2845 | else if (hh->root.type == bfd_link_hash_undefweak) | |
2846 | { | |
2847 | if (! info->shared) | |
2848 | continue; | |
2849 | } | |
2850 | else if (hh->root.type == bfd_link_hash_undefined) | |
2851 | { | |
2852 | if (! (info->unresolved_syms_in_objects == RM_IGNORE | |
2853 | && (ELF_ST_VISIBILITY (hh->other) | |
2854 | == STV_DEFAULT))) | |
2855 | continue; | |
2856 | } | |
2857 | else | |
2858 | { | |
2859 | bfd_set_error (bfd_error_bad_value); | |
2860 | ||
2861 | error_ret_free_internal: | |
2862 | if (elf_section_data (section)->relocs == NULL) | |
2863 | free (internal_relocs); | |
2864 | goto error_ret_free_local; | |
2865 | } | |
2866 | } | |
2867 | ||
2868 | if (! avr_stub_is_required_for_16_bit_reloc | |
2869 | (destination - htab->vector_base)) | |
2870 | { | |
2871 | if (!is_prealloc_run) | |
2872 | /* We are having a reloc that does't need a stub. */ | |
2873 | continue; | |
2874 | ||
2875 | /* We don't right now know if a stub will be needed. | |
2876 | Let's rather be on the safe side. */ | |
2877 | } | |
2878 | ||
2879 | /* Get the name of this stub. */ | |
2880 | stub_name = avr_stub_name (sym_sec, sym_value, irela); | |
2881 | ||
2882 | if (!stub_name) | |
2883 | goto error_ret_free_internal; | |
2884 | ||
2885 | ||
2886 | hsh = avr_stub_hash_lookup (&htab->bstab, | |
2887 | stub_name, | |
2888 | FALSE, FALSE); | |
2889 | if (hsh != NULL) | |
2890 | { | |
2891 | /* The proper stub has already been created. Mark it | |
2892 | to be used and write the possibly changed destination | |
2893 | value. */ | |
2894 | hsh->is_actually_needed = TRUE; | |
2895 | hsh->target_value = destination; | |
2896 | free (stub_name); | |
2897 | continue; | |
2898 | } | |
2899 | ||
2900 | hsh = avr_add_stub (stub_name, htab); | |
2901 | if (hsh == NULL) | |
2902 | { | |
2903 | free (stub_name); | |
2904 | goto error_ret_free_internal; | |
2905 | } | |
2906 | ||
2907 | hsh->is_actually_needed = TRUE; | |
2908 | hsh->target_value = destination; | |
2909 | ||
2910 | if (debug_stubs) | |
2911 | printf ("Adding stub with destination 0x%x to the" | |
2912 | " hash table.\n", (unsigned int) destination); | |
2913 | if (debug_stubs) | |
2914 | printf ("(Pre-Alloc run: %i)\n", is_prealloc_run); | |
2915 | ||
2916 | stub_changed = TRUE; | |
2917 | } | |
2918 | ||
2919 | /* We're done with the internal relocs, free them. */ | |
2920 | if (elf_section_data (section)->relocs == NULL) | |
2921 | free (internal_relocs); | |
2922 | } | |
2923 | } | |
2924 | ||
2925 | /* Re-Calculate the number of needed stubs. */ | |
2926 | htab->stub_sec->size = 0; | |
2927 | bfd_hash_traverse (&htab->bstab, avr_size_one_stub, htab); | |
2928 | ||
2929 | if (!stub_changed) | |
2930 | break; | |
2931 | ||
2932 | stub_changed = FALSE; | |
2933 | } | |
2934 | ||
2935 | free (htab->all_local_syms); | |
2936 | return TRUE; | |
2937 | ||
2938 | error_ret_free_local: | |
2939 | free (htab->all_local_syms); | |
2940 | return FALSE; | |
2941 | } | |
2942 | ||
2943 | ||
2944 | /* Build all the stubs associated with the current output file. The | |
2945 | stubs are kept in a hash table attached to the main linker hash | |
2946 | table. We also set up the .plt entries for statically linked PIC | |
2947 | functions here. This function is called via hppaelf_finish in the | |
2948 | linker. */ | |
2949 | ||
2950 | bfd_boolean | |
2951 | elf32_avr_build_stubs (struct bfd_link_info *info) | |
2952 | { | |
2953 | asection *stub_sec; | |
2954 | struct bfd_hash_table *table; | |
2955 | struct elf32_avr_link_hash_table *htab; | |
2956 | bfd_size_type total_size = 0; | |
2957 | ||
2958 | htab = avr_link_hash_table (info); | |
64ee10b6 NC |
2959 | if (htab == NULL) |
2960 | return FALSE; | |
28c9d252 NC |
2961 | |
2962 | /* In case that there were several stub sections: */ | |
2963 | for (stub_sec = htab->stub_bfd->sections; | |
2964 | stub_sec != NULL; | |
2965 | stub_sec = stub_sec->next) | |
2966 | { | |
2967 | bfd_size_type size; | |
2968 | ||
2969 | /* Allocate memory to hold the linker stubs. */ | |
2970 | size = stub_sec->size; | |
2971 | total_size += size; | |
2972 | ||
2973 | stub_sec->contents = bfd_zalloc (htab->stub_bfd, size); | |
2974 | if (stub_sec->contents == NULL && size != 0) | |
2975 | return FALSE; | |
2976 | stub_sec->size = 0; | |
2977 | } | |
2978 | ||
2979 | /* Allocate memory for the adress mapping table. */ | |
2980 | htab->amt_entry_cnt = 0; | |
2981 | htab->amt_max_entry_cnt = total_size / 4; | |
2982 | htab->amt_stub_offsets = bfd_malloc (sizeof (bfd_vma) | |
2983 | * htab->amt_max_entry_cnt); | |
2984 | htab->amt_destination_addr = bfd_malloc (sizeof (bfd_vma) | |
2985 | * htab->amt_max_entry_cnt ); | |
2986 | ||
2987 | if (debug_stubs) | |
2988 | printf ("Allocating %i entries in the AMT\n", htab->amt_max_entry_cnt); | |
2989 | ||
2990 | /* Build the stubs as directed by the stub hash table. */ | |
2991 | table = &htab->bstab; | |
2992 | bfd_hash_traverse (table, avr_build_one_stub, info); | |
2993 | ||
2994 | if (debug_stubs) | |
2995 | printf ("Final Stub section Size: %i\n", (int) htab->stub_sec->size); | |
2996 | ||
2997 | return TRUE; | |
2998 | } | |
2999 | ||
adde6300 | 3000 | #define ELF_ARCH bfd_arch_avr |
ae95ffa6 | 3001 | #define ELF_TARGET_ID AVR_ELF_DATA |
adde6300 | 3002 | #define ELF_MACHINE_CODE EM_AVR |
aa4f99bb | 3003 | #define ELF_MACHINE_ALT1 EM_AVR_OLD |
adde6300 AM |
3004 | #define ELF_MAXPAGESIZE 1 |
3005 | ||
3006 | #define TARGET_LITTLE_SYM bfd_elf32_avr_vec | |
3007 | #define TARGET_LITTLE_NAME "elf32-avr" | |
3008 | ||
28c9d252 NC |
3009 | #define bfd_elf32_bfd_link_hash_table_create elf32_avr_link_hash_table_create |
3010 | #define bfd_elf32_bfd_link_hash_table_free elf32_avr_link_hash_table_free | |
3011 | ||
adde6300 AM |
3012 | #define elf_info_to_howto avr_info_to_howto_rela |
3013 | #define elf_info_to_howto_rel NULL | |
3014 | #define elf_backend_relocate_section elf32_avr_relocate_section | |
adde6300 | 3015 | #define elf_backend_can_gc_sections 1 |
f0fe0e16 | 3016 | #define elf_backend_rela_normal 1 |
adde6300 AM |
3017 | #define elf_backend_final_write_processing \ |
3018 | bfd_elf_avr_final_write_processing | |
3019 | #define elf_backend_object_p elf32_avr_object_p | |
3020 | ||
df406460 NC |
3021 | #define bfd_elf32_bfd_relax_section elf32_avr_relax_section |
3022 | #define bfd_elf32_bfd_get_relocated_section_contents \ | |
3023 | elf32_avr_get_relocated_section_contents | |
3024 | ||
adde6300 | 3025 | #include "elf32-target.h" |