Commit | Line | Data |
---|---|---|
3c3bdf30 | 1 | /* MMIX-specific support for 64-bit ELF. |
b2a8e766 | 2 | Copyright 2001, 2002, 2003, 2004 Free Software Foundation, Inc. |
3c3bdf30 NC |
3 | Contributed by Hans-Peter Nilsson <hp@bitrange.com> |
4 | ||
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | /* No specific ABI or "processor-specific supplement" defined. */ | |
22 | ||
23 | /* TODO: | |
f60ebe14 HPN |
24 | - "Traditional" linker relaxation (shrinking whole sections). |
25 | - Merge reloc stubs jumping to same location. | |
26 | - GETA stub relaxation (call a stub for out of range new | |
27 | R_MMIX_GETA_STUBBABLE). */ | |
3c3bdf30 NC |
28 | |
29 | #include "bfd.h" | |
30 | #include "sysdep.h" | |
31 | #include "libbfd.h" | |
32 | #include "elf-bfd.h" | |
33 | #include "elf/mmix.h" | |
34 | #include "opcode/mmix.h" | |
35 | ||
36 | #define MINUS_ONE (((bfd_vma) 0) - 1) | |
37 | ||
f60ebe14 HPN |
38 | #define MAX_PUSHJ_STUB_SIZE (5 * 4) |
39 | ||
3c3bdf30 NC |
40 | /* Put these everywhere in new code. */ |
41 | #define FATAL_DEBUG \ | |
42 | _bfd_abort (__FILE__, __LINE__, \ | |
43 | "Internal: Non-debugged code (test-case missing)") | |
44 | ||
45 | #define BAD_CASE(x) \ | |
46 | _bfd_abort (__FILE__, __LINE__, \ | |
47 | "bad case for " #x) | |
48 | ||
f0abc2a1 AM |
49 | struct _mmix_elf_section_data |
50 | { | |
51 | struct bfd_elf_section_data elf; | |
52 | union | |
53 | { | |
54 | struct bpo_reloc_section_info *reloc; | |
55 | struct bpo_greg_section_info *greg; | |
56 | } bpo; | |
f60ebe14 HPN |
57 | |
58 | struct pushj_stub_info | |
59 | { | |
60 | /* Maximum number of stubs needed for this section. */ | |
61 | bfd_size_type n_pushj_relocs; | |
62 | ||
63 | /* Size of stubs after a mmix_elf_relax_section round. */ | |
64 | bfd_size_type stubs_size_sum; | |
65 | ||
66 | /* Per-reloc stubs_size_sum information. The stubs_size_sum member is the sum | |
67 | of these. Allocated in mmix_elf_check_common_relocs. */ | |
68 | bfd_size_type *stub_size; | |
69 | ||
70 | /* Offset of next stub during relocation. Somewhat redundant with the | |
71 | above: error coverage is easier and we don't have to reset the | |
72 | stubs_size_sum for relocation. */ | |
73 | bfd_size_type stub_offset; | |
74 | } pjs; | |
f0abc2a1 AM |
75 | }; |
76 | ||
77 | #define mmix_elf_section_data(sec) \ | |
68bfbfcc | 78 | ((struct _mmix_elf_section_data *) elf_section_data (sec)) |
f0abc2a1 | 79 | |
930b4cb2 | 80 | /* For each section containing a base-plus-offset (BPO) reloc, we attach |
f0abc2a1 | 81 | this struct as mmix_elf_section_data (section)->bpo, which is otherwise |
930b4cb2 HPN |
82 | NULL. */ |
83 | struct bpo_reloc_section_info | |
84 | { | |
85 | /* The base is 1; this is the first number in this section. */ | |
86 | size_t first_base_plus_offset_reloc; | |
87 | ||
88 | /* Number of BPO-relocs in this section. */ | |
89 | size_t n_bpo_relocs_this_section; | |
90 | ||
91 | /* Running index, used at relocation time. */ | |
92 | size_t bpo_index; | |
93 | ||
94 | /* We don't have access to the bfd_link_info struct in | |
95 | mmix_final_link_relocate. What we really want to get at is the | |
96 | global single struct greg_relocation, so we stash it here. */ | |
97 | asection *bpo_greg_section; | |
98 | }; | |
99 | ||
100 | /* Helper struct (in global context) for the one below. | |
101 | There's one of these created for every BPO reloc. */ | |
102 | struct bpo_reloc_request | |
103 | { | |
104 | bfd_vma value; | |
105 | ||
106 | /* Valid after relaxation. The base is 0; the first register number | |
107 | must be added. The offset is in range 0..255. */ | |
108 | size_t regindex; | |
109 | size_t offset; | |
110 | ||
111 | /* The order number for this BPO reloc, corresponding to the order in | |
112 | which BPO relocs were found. Used to create an index after reloc | |
113 | requests are sorted. */ | |
114 | size_t bpo_reloc_no; | |
115 | ||
116 | /* Set when the value is computed. Better than coding "guard values" | |
b34976b6 | 117 | into the other members. Is FALSE only for BPO relocs in a GC:ed |
930b4cb2 | 118 | section. */ |
b34976b6 | 119 | bfd_boolean valid; |
930b4cb2 HPN |
120 | }; |
121 | ||
f0abc2a1 | 122 | /* We attach this as mmix_elf_section_data (sec)->bpo in the linker-allocated |
930b4cb2 HPN |
123 | greg contents section (MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME), |
124 | which is linked into the register contents section | |
125 | (MMIX_REG_CONTENTS_SECTION_NAME). This section is created by the | |
126 | linker; using the same hook as for usual with BPO relocs does not | |
127 | collide. */ | |
128 | struct bpo_greg_section_info | |
129 | { | |
130 | /* After GC, this reflects the number of remaining, non-excluded | |
131 | BPO-relocs. */ | |
132 | size_t n_bpo_relocs; | |
133 | ||
134 | /* This is the number of allocated bpo_reloc_requests; the size of | |
135 | sorted_indexes. Valid after the check.*relocs functions are called | |
136 | for all incoming sections. It includes the number of BPO relocs in | |
137 | sections that were GC:ed. */ | |
138 | size_t n_max_bpo_relocs; | |
139 | ||
140 | /* A counter used to find out when to fold the BPO gregs, since we | |
141 | don't have a single "after-relaxation" hook. */ | |
142 | size_t n_remaining_bpo_relocs_this_relaxation_round; | |
143 | ||
144 | /* The number of linker-allocated GREGs resulting from BPO relocs. | |
f60ebe14 HPN |
145 | This is an approximation after _bfd_mmix_before_linker_allocation |
146 | and supposedly accurate after mmix_elf_relax_section is called for | |
147 | all incoming non-collected sections. */ | |
930b4cb2 HPN |
148 | size_t n_allocated_bpo_gregs; |
149 | ||
150 | /* Index into reloc_request[], sorted on increasing "value", secondary | |
151 | by increasing index for strict sorting order. */ | |
152 | size_t *bpo_reloc_indexes; | |
153 | ||
154 | /* An array of all relocations, with the "value" member filled in by | |
155 | the relaxation function. */ | |
156 | struct bpo_reloc_request *reloc_request; | |
157 | }; | |
158 | ||
b34976b6 | 159 | static bfd_boolean mmix_elf_link_output_symbol_hook |
754021d0 AM |
160 | PARAMS ((struct bfd_link_info *, const char *, Elf_Internal_Sym *, |
161 | asection *, struct elf_link_hash_entry *)); | |
3c3bdf30 NC |
162 | |
163 | static bfd_reloc_status_type mmix_elf_reloc | |
164 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
165 | ||
166 | static reloc_howto_type *bfd_elf64_bfd_reloc_type_lookup | |
167 | PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
168 | ||
169 | static void mmix_info_to_howto_rela | |
947216bf | 170 | PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); |
3c3bdf30 NC |
171 | |
172 | static int mmix_elf_sort_relocs PARAMS ((const PTR, const PTR)); | |
173 | ||
f0abc2a1 AM |
174 | static bfd_boolean mmix_elf_new_section_hook |
175 | PARAMS ((bfd *, asection *)); | |
176 | ||
b34976b6 | 177 | static bfd_boolean mmix_elf_check_relocs |
3c3bdf30 NC |
178 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
179 | const Elf_Internal_Rela *)); | |
180 | ||
b34976b6 | 181 | static bfd_boolean mmix_elf_check_common_relocs |
930b4cb2 HPN |
182 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
183 | const Elf_Internal_Rela *)); | |
184 | ||
b34976b6 | 185 | static bfd_boolean mmix_elf_relocate_section |
3c3bdf30 NC |
186 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
187 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
188 | ||
189 | static asection * mmix_elf_gc_mark_hook | |
1e2f5b6e | 190 | PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
3c3bdf30 NC |
191 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); |
192 | ||
b34976b6 | 193 | static bfd_boolean mmix_elf_gc_sweep_hook |
930b4cb2 HPN |
194 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
195 | const Elf_Internal_Rela *)); | |
196 | ||
3c3bdf30 NC |
197 | static bfd_reloc_status_type mmix_final_link_relocate |
198 | PARAMS ((reloc_howto_type *, asection *, bfd_byte *, | |
199 | bfd_vma, bfd_signed_vma, bfd_vma, const char *, asection *)); | |
200 | ||
201 | static bfd_reloc_status_type mmix_elf_perform_relocation | |
202 | PARAMS ((asection *, reloc_howto_type *, PTR, bfd_vma, bfd_vma)); | |
203 | ||
b34976b6 | 204 | static bfd_boolean mmix_elf_section_from_bfd_section |
af746e92 | 205 | PARAMS ((bfd *, asection *, int *)); |
3c3bdf30 | 206 | |
b34976b6 | 207 | static bfd_boolean mmix_elf_add_symbol_hook |
555cd476 | 208 | PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Sym *, |
3c3bdf30 NC |
209 | const char **, flagword *, asection **, bfd_vma *)); |
210 | ||
b34976b6 | 211 | static bfd_boolean mmix_elf_is_local_label_name |
3c3bdf30 NC |
212 | PARAMS ((bfd *, const char *)); |
213 | ||
930b4cb2 HPN |
214 | static int bpo_reloc_request_sort_fn PARAMS ((const PTR, const PTR)); |
215 | ||
b34976b6 | 216 | static bfd_boolean mmix_elf_relax_section |
930b4cb2 | 217 | PARAMS ((bfd *abfd, asection *sec, struct bfd_link_info *link_info, |
b34976b6 | 218 | bfd_boolean *again)); |
930b4cb2 | 219 | |
b34976b6 | 220 | extern bfd_boolean mmix_elf_final_link PARAMS ((bfd *, struct bfd_link_info *)); |
3c3bdf30 NC |
221 | |
222 | extern void mmix_elf_symbol_processing PARAMS ((bfd *, asymbol *)); | |
223 | ||
4fa5c2a8 HPN |
224 | /* Only intended to be called from a debugger. */ |
225 | extern void mmix_dump_bpo_gregs | |
226 | PARAMS ((struct bfd_link_info *, bfd_error_handler_type)); | |
227 | ||
f60ebe14 HPN |
228 | static void |
229 | mmix_set_relaxable_size | |
230 | PARAMS ((bfd *, asection *, void *)); | |
231 | ||
232 | static bfd_boolean | |
233 | mmix_elf_get_section_contents | |
234 | PARAMS ((bfd *, sec_ptr, void *, file_ptr, bfd_size_type)); | |
235 | ||
236 | ||
3c3bdf30 NC |
237 | /* Watch out: this currently needs to have elements with the same index as |
238 | their R_MMIX_ number. */ | |
239 | static reloc_howto_type elf_mmix_howto_table[] = | |
240 | { | |
241 | /* This reloc does nothing. */ | |
242 | HOWTO (R_MMIX_NONE, /* type */ | |
243 | 0, /* rightshift */ | |
244 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
245 | 32, /* bitsize */ | |
b34976b6 | 246 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
247 | 0, /* bitpos */ |
248 | complain_overflow_bitfield, /* complain_on_overflow */ | |
249 | bfd_elf_generic_reloc, /* special_function */ | |
250 | "R_MMIX_NONE", /* name */ | |
b34976b6 | 251 | FALSE, /* partial_inplace */ |
3c3bdf30 NC |
252 | 0, /* src_mask */ |
253 | 0, /* dst_mask */ | |
b34976b6 | 254 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
255 | |
256 | /* An 8 bit absolute relocation. */ | |
257 | HOWTO (R_MMIX_8, /* type */ | |
258 | 0, /* rightshift */ | |
259 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
260 | 8, /* bitsize */ | |
b34976b6 | 261 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
262 | 0, /* bitpos */ |
263 | complain_overflow_bitfield, /* complain_on_overflow */ | |
264 | bfd_elf_generic_reloc, /* special_function */ | |
265 | "R_MMIX_8", /* name */ | |
b34976b6 | 266 | FALSE, /* partial_inplace */ |
930b4cb2 | 267 | 0, /* src_mask */ |
3c3bdf30 | 268 | 0xff, /* dst_mask */ |
b34976b6 | 269 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
270 | |
271 | /* An 16 bit absolute relocation. */ | |
272 | HOWTO (R_MMIX_16, /* type */ | |
273 | 0, /* rightshift */ | |
274 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
275 | 16, /* bitsize */ | |
b34976b6 | 276 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
277 | 0, /* bitpos */ |
278 | complain_overflow_bitfield, /* complain_on_overflow */ | |
279 | bfd_elf_generic_reloc, /* special_function */ | |
280 | "R_MMIX_16", /* name */ | |
b34976b6 | 281 | FALSE, /* partial_inplace */ |
930b4cb2 | 282 | 0, /* src_mask */ |
3c3bdf30 | 283 | 0xffff, /* dst_mask */ |
b34976b6 | 284 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
285 | |
286 | /* An 24 bit absolute relocation. */ | |
287 | HOWTO (R_MMIX_24, /* type */ | |
288 | 0, /* rightshift */ | |
289 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
290 | 24, /* bitsize */ | |
b34976b6 | 291 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
292 | 0, /* bitpos */ |
293 | complain_overflow_bitfield, /* complain_on_overflow */ | |
294 | bfd_elf_generic_reloc, /* special_function */ | |
295 | "R_MMIX_24", /* name */ | |
b34976b6 | 296 | FALSE, /* partial_inplace */ |
930b4cb2 | 297 | ~0xffffff, /* src_mask */ |
3c3bdf30 | 298 | 0xffffff, /* dst_mask */ |
b34976b6 | 299 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
300 | |
301 | /* A 32 bit absolute relocation. */ | |
302 | HOWTO (R_MMIX_32, /* type */ | |
303 | 0, /* rightshift */ | |
304 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
305 | 32, /* bitsize */ | |
b34976b6 | 306 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
307 | 0, /* bitpos */ |
308 | complain_overflow_bitfield, /* complain_on_overflow */ | |
309 | bfd_elf_generic_reloc, /* special_function */ | |
310 | "R_MMIX_32", /* name */ | |
b34976b6 | 311 | FALSE, /* partial_inplace */ |
930b4cb2 | 312 | 0, /* src_mask */ |
3c3bdf30 | 313 | 0xffffffff, /* dst_mask */ |
b34976b6 | 314 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
315 | |
316 | /* 64 bit relocation. */ | |
317 | HOWTO (R_MMIX_64, /* type */ | |
318 | 0, /* rightshift */ | |
319 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
320 | 64, /* bitsize */ | |
b34976b6 | 321 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
322 | 0, /* bitpos */ |
323 | complain_overflow_bitfield, /* complain_on_overflow */ | |
324 | bfd_elf_generic_reloc, /* special_function */ | |
325 | "R_MMIX_64", /* name */ | |
b34976b6 | 326 | FALSE, /* partial_inplace */ |
930b4cb2 | 327 | 0, /* src_mask */ |
3c3bdf30 | 328 | MINUS_ONE, /* dst_mask */ |
b34976b6 | 329 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
330 | |
331 | /* An 8 bit PC-relative relocation. */ | |
332 | HOWTO (R_MMIX_PC_8, /* type */ | |
333 | 0, /* rightshift */ | |
334 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
335 | 8, /* bitsize */ | |
b34976b6 | 336 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
337 | 0, /* bitpos */ |
338 | complain_overflow_bitfield, /* complain_on_overflow */ | |
339 | bfd_elf_generic_reloc, /* special_function */ | |
340 | "R_MMIX_PC_8", /* name */ | |
b34976b6 | 341 | FALSE, /* partial_inplace */ |
930b4cb2 | 342 | 0, /* src_mask */ |
3c3bdf30 | 343 | 0xff, /* dst_mask */ |
b34976b6 | 344 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
345 | |
346 | /* An 16 bit PC-relative relocation. */ | |
347 | HOWTO (R_MMIX_PC_16, /* type */ | |
348 | 0, /* rightshift */ | |
349 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
350 | 16, /* bitsize */ | |
b34976b6 | 351 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
352 | 0, /* bitpos */ |
353 | complain_overflow_bitfield, /* complain_on_overflow */ | |
354 | bfd_elf_generic_reloc, /* special_function */ | |
355 | "R_MMIX_PC_16", /* name */ | |
b34976b6 | 356 | FALSE, /* partial_inplace */ |
930b4cb2 | 357 | 0, /* src_mask */ |
3c3bdf30 | 358 | 0xffff, /* dst_mask */ |
b34976b6 | 359 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
360 | |
361 | /* An 24 bit PC-relative relocation. */ | |
362 | HOWTO (R_MMIX_PC_24, /* type */ | |
363 | 0, /* rightshift */ | |
364 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
365 | 24, /* bitsize */ | |
b34976b6 | 366 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
367 | 0, /* bitpos */ |
368 | complain_overflow_bitfield, /* complain_on_overflow */ | |
369 | bfd_elf_generic_reloc, /* special_function */ | |
370 | "R_MMIX_PC_24", /* name */ | |
b34976b6 | 371 | FALSE, /* partial_inplace */ |
930b4cb2 | 372 | ~0xffffff, /* src_mask */ |
3c3bdf30 | 373 | 0xffffff, /* dst_mask */ |
b34976b6 | 374 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
375 | |
376 | /* A 32 bit absolute PC-relative relocation. */ | |
377 | HOWTO (R_MMIX_PC_32, /* type */ | |
378 | 0, /* rightshift */ | |
379 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
380 | 32, /* bitsize */ | |
b34976b6 | 381 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
382 | 0, /* bitpos */ |
383 | complain_overflow_bitfield, /* complain_on_overflow */ | |
384 | bfd_elf_generic_reloc, /* special_function */ | |
385 | "R_MMIX_PC_32", /* name */ | |
b34976b6 | 386 | FALSE, /* partial_inplace */ |
930b4cb2 | 387 | 0, /* src_mask */ |
3c3bdf30 | 388 | 0xffffffff, /* dst_mask */ |
b34976b6 | 389 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
390 | |
391 | /* 64 bit PC-relative relocation. */ | |
392 | HOWTO (R_MMIX_PC_64, /* type */ | |
393 | 0, /* rightshift */ | |
394 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
395 | 64, /* bitsize */ | |
b34976b6 | 396 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
397 | 0, /* bitpos */ |
398 | complain_overflow_bitfield, /* complain_on_overflow */ | |
399 | bfd_elf_generic_reloc, /* special_function */ | |
400 | "R_MMIX_PC_64", /* name */ | |
b34976b6 | 401 | FALSE, /* partial_inplace */ |
930b4cb2 | 402 | 0, /* src_mask */ |
3c3bdf30 | 403 | MINUS_ONE, /* dst_mask */ |
b34976b6 | 404 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
405 | |
406 | /* GNU extension to record C++ vtable hierarchy. */ | |
407 | HOWTO (R_MMIX_GNU_VTINHERIT, /* type */ | |
408 | 0, /* rightshift */ | |
409 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
410 | 0, /* bitsize */ | |
b34976b6 | 411 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
412 | 0, /* bitpos */ |
413 | complain_overflow_dont, /* complain_on_overflow */ | |
414 | NULL, /* special_function */ | |
415 | "R_MMIX_GNU_VTINHERIT", /* name */ | |
b34976b6 | 416 | FALSE, /* partial_inplace */ |
3c3bdf30 NC |
417 | 0, /* src_mask */ |
418 | 0, /* dst_mask */ | |
b34976b6 | 419 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
420 | |
421 | /* GNU extension to record C++ vtable member usage. */ | |
422 | HOWTO (R_MMIX_GNU_VTENTRY, /* type */ | |
423 | 0, /* rightshift */ | |
424 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
425 | 0, /* bitsize */ | |
b34976b6 | 426 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
427 | 0, /* bitpos */ |
428 | complain_overflow_dont, /* complain_on_overflow */ | |
429 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
430 | "R_MMIX_GNU_VTENTRY", /* name */ | |
b34976b6 | 431 | FALSE, /* partial_inplace */ |
3c3bdf30 NC |
432 | 0, /* src_mask */ |
433 | 0, /* dst_mask */ | |
b34976b6 | 434 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
435 | |
436 | /* The GETA relocation is supposed to get any address that could | |
437 | possibly be reached by the GETA instruction. It can silently expand | |
438 | to get a 64-bit operand, but will complain if any of the two least | |
439 | significant bits are set. The howto members reflect a simple GETA. */ | |
440 | HOWTO (R_MMIX_GETA, /* type */ | |
441 | 2, /* rightshift */ | |
442 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
443 | 19, /* bitsize */ | |
b34976b6 | 444 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
445 | 0, /* bitpos */ |
446 | complain_overflow_signed, /* complain_on_overflow */ | |
447 | mmix_elf_reloc, /* special_function */ | |
448 | "R_MMIX_GETA", /* name */ | |
b34976b6 | 449 | FALSE, /* partial_inplace */ |
930b4cb2 | 450 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 451 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 452 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
453 | |
454 | HOWTO (R_MMIX_GETA_1, /* type */ | |
455 | 2, /* rightshift */ | |
456 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
457 | 19, /* bitsize */ | |
b34976b6 | 458 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
459 | 0, /* bitpos */ |
460 | complain_overflow_signed, /* complain_on_overflow */ | |
461 | mmix_elf_reloc, /* special_function */ | |
462 | "R_MMIX_GETA_1", /* name */ | |
b34976b6 | 463 | FALSE, /* partial_inplace */ |
930b4cb2 | 464 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 465 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 466 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
467 | |
468 | HOWTO (R_MMIX_GETA_2, /* type */ | |
469 | 2, /* rightshift */ | |
470 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
471 | 19, /* bitsize */ | |
b34976b6 | 472 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
473 | 0, /* bitpos */ |
474 | complain_overflow_signed, /* complain_on_overflow */ | |
475 | mmix_elf_reloc, /* special_function */ | |
476 | "R_MMIX_GETA_2", /* name */ | |
b34976b6 | 477 | FALSE, /* partial_inplace */ |
930b4cb2 | 478 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 479 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 480 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
481 | |
482 | HOWTO (R_MMIX_GETA_3, /* type */ | |
483 | 2, /* rightshift */ | |
484 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
485 | 19, /* bitsize */ | |
b34976b6 | 486 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
487 | 0, /* bitpos */ |
488 | complain_overflow_signed, /* complain_on_overflow */ | |
489 | mmix_elf_reloc, /* special_function */ | |
490 | "R_MMIX_GETA_3", /* name */ | |
b34976b6 | 491 | FALSE, /* partial_inplace */ |
930b4cb2 | 492 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 493 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 494 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
495 | |
496 | /* The conditional branches are supposed to reach any (code) address. | |
497 | It can silently expand to a 64-bit operand, but will emit an error if | |
498 | any of the two least significant bits are set. The howto members | |
499 | reflect a simple branch. */ | |
500 | HOWTO (R_MMIX_CBRANCH, /* type */ | |
501 | 2, /* rightshift */ | |
502 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
503 | 19, /* bitsize */ | |
b34976b6 | 504 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
505 | 0, /* bitpos */ |
506 | complain_overflow_signed, /* complain_on_overflow */ | |
507 | mmix_elf_reloc, /* special_function */ | |
508 | "R_MMIX_CBRANCH", /* name */ | |
b34976b6 | 509 | FALSE, /* partial_inplace */ |
930b4cb2 | 510 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 511 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 512 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
513 | |
514 | HOWTO (R_MMIX_CBRANCH_J, /* type */ | |
515 | 2, /* rightshift */ | |
516 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
517 | 19, /* bitsize */ | |
b34976b6 | 518 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
519 | 0, /* bitpos */ |
520 | complain_overflow_signed, /* complain_on_overflow */ | |
521 | mmix_elf_reloc, /* special_function */ | |
522 | "R_MMIX_CBRANCH_J", /* name */ | |
b34976b6 | 523 | FALSE, /* partial_inplace */ |
930b4cb2 | 524 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 525 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 526 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
527 | |
528 | HOWTO (R_MMIX_CBRANCH_1, /* type */ | |
529 | 2, /* rightshift */ | |
530 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
531 | 19, /* bitsize */ | |
b34976b6 | 532 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
533 | 0, /* bitpos */ |
534 | complain_overflow_signed, /* complain_on_overflow */ | |
535 | mmix_elf_reloc, /* special_function */ | |
536 | "R_MMIX_CBRANCH_1", /* name */ | |
b34976b6 | 537 | FALSE, /* partial_inplace */ |
930b4cb2 | 538 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 539 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 540 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
541 | |
542 | HOWTO (R_MMIX_CBRANCH_2, /* type */ | |
543 | 2, /* rightshift */ | |
544 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
545 | 19, /* bitsize */ | |
b34976b6 | 546 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
547 | 0, /* bitpos */ |
548 | complain_overflow_signed, /* complain_on_overflow */ | |
549 | mmix_elf_reloc, /* special_function */ | |
550 | "R_MMIX_CBRANCH_2", /* name */ | |
b34976b6 | 551 | FALSE, /* partial_inplace */ |
930b4cb2 | 552 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 553 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 554 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
555 | |
556 | HOWTO (R_MMIX_CBRANCH_3, /* type */ | |
557 | 2, /* rightshift */ | |
558 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
559 | 19, /* bitsize */ | |
b34976b6 | 560 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
561 | 0, /* bitpos */ |
562 | complain_overflow_signed, /* complain_on_overflow */ | |
563 | mmix_elf_reloc, /* special_function */ | |
564 | "R_MMIX_CBRANCH_3", /* name */ | |
b34976b6 | 565 | FALSE, /* partial_inplace */ |
930b4cb2 | 566 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 567 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 568 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
569 | |
570 | /* The PUSHJ instruction can reach any (code) address, as long as it's | |
571 | the beginning of a function (no usable restriction). It can silently | |
572 | expand to a 64-bit operand, but will emit an error if any of the two | |
f60ebe14 HPN |
573 | least significant bits are set. It can also expand into a call to a |
574 | stub; see R_MMIX_PUSHJ_STUBBABLE. The howto members reflect a simple | |
3c3bdf30 NC |
575 | PUSHJ. */ |
576 | HOWTO (R_MMIX_PUSHJ, /* type */ | |
577 | 2, /* rightshift */ | |
578 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
579 | 19, /* bitsize */ | |
b34976b6 | 580 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
581 | 0, /* bitpos */ |
582 | complain_overflow_signed, /* complain_on_overflow */ | |
583 | mmix_elf_reloc, /* special_function */ | |
584 | "R_MMIX_PUSHJ", /* name */ | |
b34976b6 | 585 | FALSE, /* partial_inplace */ |
930b4cb2 | 586 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 587 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 588 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
589 | |
590 | HOWTO (R_MMIX_PUSHJ_1, /* type */ | |
591 | 2, /* rightshift */ | |
592 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
593 | 19, /* bitsize */ | |
b34976b6 | 594 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
595 | 0, /* bitpos */ |
596 | complain_overflow_signed, /* complain_on_overflow */ | |
597 | mmix_elf_reloc, /* special_function */ | |
598 | "R_MMIX_PUSHJ_1", /* name */ | |
b34976b6 | 599 | FALSE, /* partial_inplace */ |
930b4cb2 | 600 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 601 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 602 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
603 | |
604 | HOWTO (R_MMIX_PUSHJ_2, /* type */ | |
605 | 2, /* rightshift */ | |
606 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
607 | 19, /* bitsize */ | |
b34976b6 | 608 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
609 | 0, /* bitpos */ |
610 | complain_overflow_signed, /* complain_on_overflow */ | |
611 | mmix_elf_reloc, /* special_function */ | |
612 | "R_MMIX_PUSHJ_2", /* name */ | |
b34976b6 | 613 | FALSE, /* partial_inplace */ |
930b4cb2 | 614 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 615 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 616 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
617 | |
618 | HOWTO (R_MMIX_PUSHJ_3, /* type */ | |
619 | 2, /* rightshift */ | |
620 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
621 | 19, /* bitsize */ | |
b34976b6 | 622 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
623 | 0, /* bitpos */ |
624 | complain_overflow_signed, /* complain_on_overflow */ | |
625 | mmix_elf_reloc, /* special_function */ | |
626 | "R_MMIX_PUSHJ_3", /* name */ | |
b34976b6 | 627 | FALSE, /* partial_inplace */ |
930b4cb2 | 628 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 629 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 630 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
631 | |
632 | /* A JMP is supposed to reach any (code) address. By itself, it can | |
633 | reach +-64M; the expansion can reach all 64 bits. Note that the 64M | |
634 | limit is soon reached if you link the program in wildly different | |
635 | memory segments. The howto members reflect a trivial JMP. */ | |
636 | HOWTO (R_MMIX_JMP, /* type */ | |
637 | 2, /* rightshift */ | |
638 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
639 | 27, /* bitsize */ | |
b34976b6 | 640 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
641 | 0, /* bitpos */ |
642 | complain_overflow_signed, /* complain_on_overflow */ | |
643 | mmix_elf_reloc, /* special_function */ | |
644 | "R_MMIX_JMP", /* name */ | |
b34976b6 | 645 | FALSE, /* partial_inplace */ |
930b4cb2 | 646 | ~0x1ffffff, /* src_mask */ |
3c3bdf30 | 647 | 0x1ffffff, /* dst_mask */ |
b34976b6 | 648 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
649 | |
650 | HOWTO (R_MMIX_JMP_1, /* type */ | |
651 | 2, /* rightshift */ | |
652 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
653 | 27, /* bitsize */ | |
b34976b6 | 654 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
655 | 0, /* bitpos */ |
656 | complain_overflow_signed, /* complain_on_overflow */ | |
657 | mmix_elf_reloc, /* special_function */ | |
658 | "R_MMIX_JMP_1", /* name */ | |
b34976b6 | 659 | FALSE, /* partial_inplace */ |
930b4cb2 | 660 | ~0x1ffffff, /* src_mask */ |
3c3bdf30 | 661 | 0x1ffffff, /* dst_mask */ |
b34976b6 | 662 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
663 | |
664 | HOWTO (R_MMIX_JMP_2, /* type */ | |
665 | 2, /* rightshift */ | |
666 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
667 | 27, /* bitsize */ | |
b34976b6 | 668 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
669 | 0, /* bitpos */ |
670 | complain_overflow_signed, /* complain_on_overflow */ | |
671 | mmix_elf_reloc, /* special_function */ | |
672 | "R_MMIX_JMP_2", /* name */ | |
b34976b6 | 673 | FALSE, /* partial_inplace */ |
930b4cb2 | 674 | ~0x1ffffff, /* src_mask */ |
3c3bdf30 | 675 | 0x1ffffff, /* dst_mask */ |
b34976b6 | 676 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
677 | |
678 | HOWTO (R_MMIX_JMP_3, /* type */ | |
679 | 2, /* rightshift */ | |
680 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
681 | 27, /* bitsize */ | |
b34976b6 | 682 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
683 | 0, /* bitpos */ |
684 | complain_overflow_signed, /* complain_on_overflow */ | |
685 | mmix_elf_reloc, /* special_function */ | |
686 | "R_MMIX_JMP_3", /* name */ | |
b34976b6 | 687 | FALSE, /* partial_inplace */ |
930b4cb2 | 688 | ~0x1ffffff, /* src_mask */ |
3c3bdf30 | 689 | 0x1ffffff, /* dst_mask */ |
b34976b6 | 690 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
691 | |
692 | /* When we don't emit link-time-relaxable code from the assembler, or | |
693 | when relaxation has done all it can do, these relocs are used. For | |
694 | GETA/PUSHJ/branches. */ | |
695 | HOWTO (R_MMIX_ADDR19, /* type */ | |
696 | 2, /* rightshift */ | |
697 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
698 | 19, /* bitsize */ | |
b34976b6 | 699 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
700 | 0, /* bitpos */ |
701 | complain_overflow_signed, /* complain_on_overflow */ | |
702 | mmix_elf_reloc, /* special_function */ | |
703 | "R_MMIX_ADDR19", /* name */ | |
b34976b6 | 704 | FALSE, /* partial_inplace */ |
930b4cb2 | 705 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 706 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 707 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
708 | |
709 | /* For JMP. */ | |
710 | HOWTO (R_MMIX_ADDR27, /* type */ | |
711 | 2, /* rightshift */ | |
712 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
713 | 27, /* bitsize */ | |
b34976b6 | 714 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
715 | 0, /* bitpos */ |
716 | complain_overflow_signed, /* complain_on_overflow */ | |
717 | mmix_elf_reloc, /* special_function */ | |
718 | "R_MMIX_ADDR27", /* name */ | |
b34976b6 | 719 | FALSE, /* partial_inplace */ |
930b4cb2 | 720 | ~0x1ffffff, /* src_mask */ |
3c3bdf30 | 721 | 0x1ffffff, /* dst_mask */ |
b34976b6 | 722 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
723 | |
724 | /* A general register or the value 0..255. If a value, then the | |
725 | instruction (offset -3) needs adjusting. */ | |
726 | HOWTO (R_MMIX_REG_OR_BYTE, /* type */ | |
727 | 0, /* rightshift */ | |
728 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
729 | 8, /* bitsize */ | |
b34976b6 | 730 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
731 | 0, /* bitpos */ |
732 | complain_overflow_bitfield, /* complain_on_overflow */ | |
733 | mmix_elf_reloc, /* special_function */ | |
734 | "R_MMIX_REG_OR_BYTE", /* name */ | |
b34976b6 | 735 | FALSE, /* partial_inplace */ |
930b4cb2 | 736 | 0, /* src_mask */ |
3c3bdf30 | 737 | 0xff, /* dst_mask */ |
b34976b6 | 738 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
739 | |
740 | /* A general register. */ | |
741 | HOWTO (R_MMIX_REG, /* type */ | |
742 | 0, /* rightshift */ | |
743 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
744 | 8, /* bitsize */ | |
b34976b6 | 745 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
746 | 0, /* bitpos */ |
747 | complain_overflow_bitfield, /* complain_on_overflow */ | |
748 | mmix_elf_reloc, /* special_function */ | |
749 | "R_MMIX_REG", /* name */ | |
b34976b6 | 750 | FALSE, /* partial_inplace */ |
930b4cb2 | 751 | 0, /* src_mask */ |
3c3bdf30 | 752 | 0xff, /* dst_mask */ |
b34976b6 | 753 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
754 | |
755 | /* A register plus an index, corresponding to the relocation expression. | |
756 | The sizes must correspond to the valid range of the expression, while | |
757 | the bitmasks correspond to what we store in the image. */ | |
758 | HOWTO (R_MMIX_BASE_PLUS_OFFSET, /* type */ | |
759 | 0, /* rightshift */ | |
760 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
761 | 64, /* bitsize */ | |
b34976b6 | 762 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
763 | 0, /* bitpos */ |
764 | complain_overflow_bitfield, /* complain_on_overflow */ | |
765 | mmix_elf_reloc, /* special_function */ | |
766 | "R_MMIX_BASE_PLUS_OFFSET", /* name */ | |
b34976b6 | 767 | FALSE, /* partial_inplace */ |
930b4cb2 | 768 | 0, /* src_mask */ |
3c3bdf30 | 769 | 0xffff, /* dst_mask */ |
b34976b6 | 770 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
771 | |
772 | /* A "magic" relocation for a LOCAL expression, asserting that the | |
773 | expression is less than the number of global registers. No actual | |
774 | modification of the contents is done. Implementing this as a | |
775 | relocation was less intrusive than e.g. putting such expressions in a | |
776 | section to discard *after* relocation. */ | |
777 | HOWTO (R_MMIX_LOCAL, /* type */ | |
778 | 0, /* rightshift */ | |
779 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
780 | 0, /* bitsize */ | |
b34976b6 | 781 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
782 | 0, /* bitpos */ |
783 | complain_overflow_dont, /* complain_on_overflow */ | |
784 | mmix_elf_reloc, /* special_function */ | |
785 | "R_MMIX_LOCAL", /* name */ | |
b34976b6 | 786 | FALSE, /* partial_inplace */ |
3c3bdf30 NC |
787 | 0, /* src_mask */ |
788 | 0, /* dst_mask */ | |
b34976b6 | 789 | FALSE), /* pcrel_offset */ |
f60ebe14 HPN |
790 | |
791 | HOWTO (R_MMIX_PUSHJ_STUBBABLE, /* type */ | |
792 | 2, /* rightshift */ | |
793 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
794 | 19, /* bitsize */ | |
795 | TRUE, /* pc_relative */ | |
796 | 0, /* bitpos */ | |
797 | complain_overflow_signed, /* complain_on_overflow */ | |
798 | mmix_elf_reloc, /* special_function */ | |
799 | "R_MMIX_PUSHJ_STUBBABLE", /* name */ | |
800 | FALSE, /* partial_inplace */ | |
801 | ~0x0100ffff, /* src_mask */ | |
802 | 0x0100ffff, /* dst_mask */ | |
803 | TRUE) /* pcrel_offset */ | |
3c3bdf30 NC |
804 | }; |
805 | ||
806 | ||
807 | /* Map BFD reloc types to MMIX ELF reloc types. */ | |
808 | ||
809 | struct mmix_reloc_map | |
810 | { | |
811 | bfd_reloc_code_real_type bfd_reloc_val; | |
812 | enum elf_mmix_reloc_type elf_reloc_val; | |
813 | }; | |
814 | ||
815 | ||
816 | static const struct mmix_reloc_map mmix_reloc_map[] = | |
817 | { | |
818 | {BFD_RELOC_NONE, R_MMIX_NONE}, | |
819 | {BFD_RELOC_8, R_MMIX_8}, | |
820 | {BFD_RELOC_16, R_MMIX_16}, | |
821 | {BFD_RELOC_24, R_MMIX_24}, | |
822 | {BFD_RELOC_32, R_MMIX_32}, | |
823 | {BFD_RELOC_64, R_MMIX_64}, | |
824 | {BFD_RELOC_8_PCREL, R_MMIX_PC_8}, | |
825 | {BFD_RELOC_16_PCREL, R_MMIX_PC_16}, | |
826 | {BFD_RELOC_24_PCREL, R_MMIX_PC_24}, | |
827 | {BFD_RELOC_32_PCREL, R_MMIX_PC_32}, | |
828 | {BFD_RELOC_64_PCREL, R_MMIX_PC_64}, | |
829 | {BFD_RELOC_VTABLE_INHERIT, R_MMIX_GNU_VTINHERIT}, | |
830 | {BFD_RELOC_VTABLE_ENTRY, R_MMIX_GNU_VTENTRY}, | |
831 | {BFD_RELOC_MMIX_GETA, R_MMIX_GETA}, | |
832 | {BFD_RELOC_MMIX_CBRANCH, R_MMIX_CBRANCH}, | |
833 | {BFD_RELOC_MMIX_PUSHJ, R_MMIX_PUSHJ}, | |
834 | {BFD_RELOC_MMIX_JMP, R_MMIX_JMP}, | |
835 | {BFD_RELOC_MMIX_ADDR19, R_MMIX_ADDR19}, | |
836 | {BFD_RELOC_MMIX_ADDR27, R_MMIX_ADDR27}, | |
837 | {BFD_RELOC_MMIX_REG_OR_BYTE, R_MMIX_REG_OR_BYTE}, | |
838 | {BFD_RELOC_MMIX_REG, R_MMIX_REG}, | |
839 | {BFD_RELOC_MMIX_BASE_PLUS_OFFSET, R_MMIX_BASE_PLUS_OFFSET}, | |
f60ebe14 HPN |
840 | {BFD_RELOC_MMIX_LOCAL, R_MMIX_LOCAL}, |
841 | {BFD_RELOC_MMIX_PUSHJ_STUBBABLE, R_MMIX_PUSHJ_STUBBABLE} | |
3c3bdf30 NC |
842 | }; |
843 | ||
844 | static reloc_howto_type * | |
845 | bfd_elf64_bfd_reloc_type_lookup (abfd, code) | |
846 | bfd *abfd ATTRIBUTE_UNUSED; | |
847 | bfd_reloc_code_real_type code; | |
848 | { | |
849 | unsigned int i; | |
850 | ||
851 | for (i = 0; | |
852 | i < sizeof (mmix_reloc_map) / sizeof (mmix_reloc_map[0]); | |
853 | i++) | |
854 | { | |
855 | if (mmix_reloc_map[i].bfd_reloc_val == code) | |
856 | return &elf_mmix_howto_table[mmix_reloc_map[i].elf_reloc_val]; | |
857 | } | |
858 | ||
859 | return NULL; | |
860 | } | |
861 | ||
f0abc2a1 AM |
862 | static bfd_boolean |
863 | mmix_elf_new_section_hook (abfd, sec) | |
864 | bfd *abfd; | |
865 | asection *sec; | |
866 | { | |
867 | struct _mmix_elf_section_data *sdata; | |
868 | bfd_size_type amt = sizeof (*sdata); | |
869 | ||
870 | sdata = (struct _mmix_elf_section_data *) bfd_zalloc (abfd, amt); | |
871 | if (sdata == NULL) | |
872 | return FALSE; | |
873 | sec->used_by_bfd = (PTR) sdata; | |
874 | ||
875 | return _bfd_elf_new_section_hook (abfd, sec); | |
876 | } | |
877 | ||
3c3bdf30 NC |
878 | |
879 | /* This function performs the actual bitfiddling and sanity check for a | |
880 | final relocation. Each relocation gets its *worst*-case expansion | |
881 | in size when it arrives here; any reduction in size should have been | |
882 | caught in linker relaxation earlier. When we get here, the relocation | |
883 | looks like the smallest instruction with SWYM:s (nop:s) appended to the | |
884 | max size. We fill in those nop:s. | |
885 | ||
886 | R_MMIX_GETA: (FIXME: Relaxation should break this up in 1, 2, 3 tetra) | |
887 | GETA $N,foo | |
888 | -> | |
889 | SETL $N,foo & 0xffff | |
890 | INCML $N,(foo >> 16) & 0xffff | |
891 | INCMH $N,(foo >> 32) & 0xffff | |
892 | INCH $N,(foo >> 48) & 0xffff | |
893 | ||
894 | R_MMIX_CBRANCH: (FIXME: Relaxation should break this up, but | |
895 | condbranches needing relaxation might be rare enough to not be | |
896 | worthwhile.) | |
897 | [P]Bcc $N,foo | |
898 | -> | |
899 | [~P]B~cc $N,.+20 | |
900 | SETL $255,foo & ... | |
901 | INCML ... | |
902 | INCMH ... | |
903 | INCH ... | |
904 | GO $255,$255,0 | |
905 | ||
906 | R_MMIX_PUSHJ: (FIXME: Relaxation...) | |
907 | PUSHJ $N,foo | |
908 | -> | |
909 | SETL $255,foo & ... | |
910 | INCML ... | |
911 | INCMH ... | |
912 | INCH ... | |
913 | PUSHGO $N,$255,0 | |
914 | ||
915 | R_MMIX_JMP: (FIXME: Relaxation...) | |
916 | JMP foo | |
917 | -> | |
918 | SETL $255,foo & ... | |
919 | INCML ... | |
920 | INCMH ... | |
921 | INCH ... | |
922 | GO $255,$255,0 | |
923 | ||
924 | R_MMIX_ADDR19 and R_MMIX_ADDR27 are just filled in. */ | |
925 | ||
926 | static bfd_reloc_status_type | |
927 | mmix_elf_perform_relocation (isec, howto, datap, addr, value) | |
928 | asection *isec; | |
929 | reloc_howto_type *howto; | |
930 | PTR datap; | |
f60ebe14 | 931 | bfd_vma addr; |
3c3bdf30 NC |
932 | bfd_vma value; |
933 | { | |
934 | bfd *abfd = isec->owner; | |
935 | bfd_reloc_status_type flag = bfd_reloc_ok; | |
936 | bfd_reloc_status_type r; | |
937 | int offs = 0; | |
938 | int reg = 255; | |
939 | ||
940 | /* The worst case bits are all similar SETL/INCML/INCMH/INCH sequences. | |
941 | We handle the differences here and the common sequence later. */ | |
942 | switch (howto->type) | |
943 | { | |
944 | case R_MMIX_GETA: | |
945 | offs = 0; | |
946 | reg = bfd_get_8 (abfd, (bfd_byte *) datap + 1); | |
947 | ||
948 | /* We change to an absolute value. */ | |
949 | value += addr; | |
950 | break; | |
951 | ||
952 | case R_MMIX_CBRANCH: | |
953 | { | |
954 | int in1 = bfd_get_16 (abfd, (bfd_byte *) datap) << 16; | |
955 | ||
956 | /* Invert the condition and prediction bit, and set the offset | |
957 | to five instructions ahead. | |
958 | ||
959 | We *can* do better if we want to. If the branch is found to be | |
960 | within limits, we could leave the branch as is; there'll just | |
961 | be a bunch of NOP:s after it. But we shouldn't see this | |
962 | sequence often enough that it's worth doing it. */ | |
963 | ||
964 | bfd_put_32 (abfd, | |
965 | (((in1 ^ ((PRED_INV_BIT | COND_INV_BIT) << 24)) & ~0xffff) | |
966 | | (24/4)), | |
967 | (bfd_byte *) datap); | |
968 | ||
969 | /* Put a "GO $255,$255,0" after the common sequence. */ | |
970 | bfd_put_32 (abfd, | |
971 | ((GO_INSN_BYTE | IMM_OFFSET_BIT) << 24) | 0xffff00, | |
972 | (bfd_byte *) datap + 20); | |
973 | ||
974 | /* Common sequence starts at offset 4. */ | |
975 | offs = 4; | |
976 | ||
977 | /* We change to an absolute value. */ | |
978 | value += addr; | |
979 | } | |
980 | break; | |
981 | ||
f60ebe14 HPN |
982 | case R_MMIX_PUSHJ_STUBBABLE: |
983 | /* If the address fits, we're fine. */ | |
984 | if ((value & 3) == 0 | |
985 | /* Note rightshift 0; see R_MMIX_JMP case below. */ | |
986 | && (r = bfd_check_overflow (complain_overflow_signed, | |
987 | howto->bitsize, | |
988 | 0, | |
989 | bfd_arch_bits_per_address (abfd), | |
990 | value)) == bfd_reloc_ok) | |
991 | goto pcrel_mmix_reloc_fits; | |
992 | else | |
993 | { | |
eea6121a AM |
994 | bfd_size_type size |
995 | = (isec->size | |
996 | - (mmix_elf_section_data (isec)->pjs.n_pushj_relocs | |
997 | * MAX_PUSHJ_STUB_SIZE)); | |
f60ebe14 HPN |
998 | |
999 | /* We have the bytes at the PUSHJ insn and need to get the | |
1000 | position for the stub. There's supposed to be room allocated | |
1001 | for the stub. */ | |
1002 | bfd_byte *stubcontents | |
1003 | = ((char *) datap | |
1004 | - (addr - (isec->output_section->vma + isec->output_offset)) | |
eea6121a | 1005 | + size |
f60ebe14 HPN |
1006 | + mmix_elf_section_data (isec)->pjs.stub_offset); |
1007 | bfd_vma stubaddr; | |
1008 | ||
1009 | /* The address doesn't fit, so redirect the PUSHJ to the | |
1010 | location of the stub. */ | |
1011 | r = mmix_elf_perform_relocation (isec, | |
1012 | &elf_mmix_howto_table | |
1013 | [R_MMIX_ADDR19], | |
1014 | datap, | |
1015 | addr, | |
1016 | isec->output_section->vma | |
1017 | + isec->output_offset | |
eea6121a | 1018 | + size |
f60ebe14 HPN |
1019 | + (mmix_elf_section_data (isec) |
1020 | ->pjs.stub_offset) | |
1021 | - addr); | |
1022 | if (r != bfd_reloc_ok) | |
1023 | return r; | |
1024 | ||
1025 | stubaddr | |
1026 | = (isec->output_section->vma | |
1027 | + isec->output_offset | |
eea6121a | 1028 | + size |
f60ebe14 HPN |
1029 | + mmix_elf_section_data (isec)->pjs.stub_offset); |
1030 | ||
1031 | /* We generate a simple JMP if that suffices, else the whole 5 | |
1032 | insn stub. */ | |
1033 | if (bfd_check_overflow (complain_overflow_signed, | |
1034 | elf_mmix_howto_table[R_MMIX_ADDR27].bitsize, | |
1035 | 0, | |
1036 | bfd_arch_bits_per_address (abfd), | |
1037 | addr + value - stubaddr) == bfd_reloc_ok) | |
1038 | { | |
1039 | bfd_put_32 (abfd, JMP_INSN_BYTE << 24, stubcontents); | |
1040 | r = mmix_elf_perform_relocation (isec, | |
1041 | &elf_mmix_howto_table | |
1042 | [R_MMIX_ADDR27], | |
1043 | stubcontents, | |
1044 | stubaddr, | |
1045 | value + addr - stubaddr); | |
1046 | mmix_elf_section_data (isec)->pjs.stub_offset += 4; | |
1047 | ||
eea6121a AM |
1048 | if (size + mmix_elf_section_data (isec)->pjs.stub_offset |
1049 | > isec->size) | |
f60ebe14 HPN |
1050 | abort (); |
1051 | ||
1052 | return r; | |
1053 | } | |
1054 | else | |
1055 | { | |
1056 | /* Put a "GO $255,0" after the common sequence. */ | |
1057 | bfd_put_32 (abfd, | |
1058 | ((GO_INSN_BYTE | IMM_OFFSET_BIT) << 24) | |
1059 | | 0xff00, (bfd_byte *) stubcontents + 16); | |
1060 | ||
1061 | /* Prepare for the general code to set the first part of the | |
1062 | linker stub, and */ | |
1063 | value += addr; | |
1064 | datap = stubcontents; | |
1065 | mmix_elf_section_data (isec)->pjs.stub_offset | |
1066 | += MAX_PUSHJ_STUB_SIZE; | |
1067 | } | |
1068 | } | |
1069 | break; | |
1070 | ||
3c3bdf30 NC |
1071 | case R_MMIX_PUSHJ: |
1072 | { | |
1073 | int inreg = bfd_get_8 (abfd, (bfd_byte *) datap + 1); | |
1074 | ||
1075 | /* Put a "PUSHGO $N,$255,0" after the common sequence. */ | |
1076 | bfd_put_32 (abfd, | |
1077 | ((PUSHGO_INSN_BYTE | IMM_OFFSET_BIT) << 24) | |
1078 | | (inreg << 16) | |
1079 | | 0xff00, | |
1080 | (bfd_byte *) datap + 16); | |
1081 | ||
1082 | /* We change to an absolute value. */ | |
1083 | value += addr; | |
1084 | } | |
1085 | break; | |
1086 | ||
1087 | case R_MMIX_JMP: | |
1088 | /* This one is a little special. If we get here on a non-relaxing | |
1089 | link, and the destination is actually in range, we don't need to | |
1090 | execute the nops. | |
1091 | If so, we fall through to the bit-fiddling relocs. | |
1092 | ||
1093 | FIXME: bfd_check_overflow seems broken; the relocation is | |
1094 | rightshifted before testing, so supply a zero rightshift. */ | |
1095 | ||
1096 | if (! ((value & 3) == 0 | |
1097 | && (r = bfd_check_overflow (complain_overflow_signed, | |
1098 | howto->bitsize, | |
1099 | 0, | |
1100 | bfd_arch_bits_per_address (abfd), | |
1101 | value)) == bfd_reloc_ok)) | |
1102 | { | |
1103 | /* If the relocation doesn't fit in a JMP, we let the NOP:s be | |
1104 | modified below, and put a "GO $255,$255,0" after the | |
1105 | address-loading sequence. */ | |
1106 | bfd_put_32 (abfd, | |
1107 | ((GO_INSN_BYTE | IMM_OFFSET_BIT) << 24) | |
1108 | | 0xffff00, | |
1109 | (bfd_byte *) datap + 16); | |
1110 | ||
1111 | /* We change to an absolute value. */ | |
1112 | value += addr; | |
1113 | break; | |
1114 | } | |
cedb70c5 | 1115 | /* FALLTHROUGH. */ |
3c3bdf30 NC |
1116 | case R_MMIX_ADDR19: |
1117 | case R_MMIX_ADDR27: | |
f60ebe14 | 1118 | pcrel_mmix_reloc_fits: |
3c3bdf30 NC |
1119 | /* These must be in range, or else we emit an error. */ |
1120 | if ((value & 3) == 0 | |
1121 | /* Note rightshift 0; see above. */ | |
1122 | && (r = bfd_check_overflow (complain_overflow_signed, | |
1123 | howto->bitsize, | |
1124 | 0, | |
1125 | bfd_arch_bits_per_address (abfd), | |
1126 | value)) == bfd_reloc_ok) | |
1127 | { | |
1128 | bfd_vma in1 | |
1129 | = bfd_get_32 (abfd, (bfd_byte *) datap); | |
1130 | bfd_vma highbit; | |
1131 | ||
1132 | if ((bfd_signed_vma) value < 0) | |
1133 | { | |
f60ebe14 | 1134 | highbit = 1 << 24; |
3c3bdf30 NC |
1135 | value += (1 << (howto->bitsize - 1)); |
1136 | } | |
1137 | else | |
1138 | highbit = 0; | |
1139 | ||
1140 | value >>= 2; | |
1141 | ||
1142 | bfd_put_32 (abfd, | |
930b4cb2 | 1143 | (in1 & howto->src_mask) |
3c3bdf30 NC |
1144 | | highbit |
1145 | | (value & howto->dst_mask), | |
1146 | (bfd_byte *) datap); | |
1147 | ||
1148 | return bfd_reloc_ok; | |
1149 | } | |
1150 | else | |
1151 | return bfd_reloc_overflow; | |
1152 | ||
930b4cb2 HPN |
1153 | case R_MMIX_BASE_PLUS_OFFSET: |
1154 | { | |
1155 | struct bpo_reloc_section_info *bpodata | |
f0abc2a1 | 1156 | = mmix_elf_section_data (isec)->bpo.reloc; |
930b4cb2 HPN |
1157 | asection *bpo_greg_section |
1158 | = bpodata->bpo_greg_section; | |
1159 | struct bpo_greg_section_info *gregdata | |
f0abc2a1 | 1160 | = mmix_elf_section_data (bpo_greg_section)->bpo.greg; |
930b4cb2 HPN |
1161 | size_t bpo_index |
1162 | = gregdata->bpo_reloc_indexes[bpodata->bpo_index++]; | |
1163 | ||
1164 | /* A consistency check: The value we now have in "relocation" must | |
1165 | be the same as the value we stored for that relocation. It | |
1166 | doesn't cost much, so can be left in at all times. */ | |
1167 | if (value != gregdata->reloc_request[bpo_index].value) | |
1168 | { | |
1169 | (*_bfd_error_handler) | |
1170 | (_("%s: Internal inconsistency error for value for\n\ | |
1171 | linker-allocated global register: linked: 0x%lx%08lx != relaxed: 0x%lx%08lx\n"), | |
1172 | bfd_get_filename (isec->owner), | |
1173 | (unsigned long) (value >> 32), (unsigned long) value, | |
1174 | (unsigned long) (gregdata->reloc_request[bpo_index].value | |
1175 | >> 32), | |
1176 | (unsigned long) gregdata->reloc_request[bpo_index].value); | |
1177 | bfd_set_error (bfd_error_bad_value); | |
1178 | return bfd_reloc_overflow; | |
1179 | } | |
1180 | ||
1181 | /* Then store the register number and offset for that register | |
1182 | into datap and datap + 1 respectively. */ | |
1183 | bfd_put_8 (abfd, | |
1184 | gregdata->reloc_request[bpo_index].regindex | |
1185 | + bpo_greg_section->output_section->vma / 8, | |
1186 | datap); | |
1187 | bfd_put_8 (abfd, | |
1188 | gregdata->reloc_request[bpo_index].offset, | |
1189 | ((unsigned char *) datap) + 1); | |
1190 | return bfd_reloc_ok; | |
1191 | } | |
1192 | ||
3c3bdf30 NC |
1193 | case R_MMIX_REG_OR_BYTE: |
1194 | case R_MMIX_REG: | |
1195 | if (value > 255) | |
1196 | return bfd_reloc_overflow; | |
1197 | bfd_put_8 (abfd, value, datap); | |
1198 | return bfd_reloc_ok; | |
1199 | ||
1200 | default: | |
1201 | BAD_CASE (howto->type); | |
1202 | } | |
1203 | ||
1204 | /* This code adds the common SETL/INCML/INCMH/INCH worst-case | |
1205 | sequence. */ | |
1206 | ||
1207 | /* Lowest two bits must be 0. We return bfd_reloc_overflow for | |
1208 | everything that looks strange. */ | |
1209 | if (value & 3) | |
1210 | flag = bfd_reloc_overflow; | |
1211 | ||
1212 | bfd_put_32 (abfd, | |
1213 | (SETL_INSN_BYTE << 24) | (value & 0xffff) | (reg << 16), | |
1214 | (bfd_byte *) datap + offs); | |
1215 | bfd_put_32 (abfd, | |
1216 | (INCML_INSN_BYTE << 24) | ((value >> 16) & 0xffff) | (reg << 16), | |
1217 | (bfd_byte *) datap + offs + 4); | |
1218 | bfd_put_32 (abfd, | |
1219 | (INCMH_INSN_BYTE << 24) | ((value >> 32) & 0xffff) | (reg << 16), | |
1220 | (bfd_byte *) datap + offs + 8); | |
1221 | bfd_put_32 (abfd, | |
1222 | (INCH_INSN_BYTE << 24) | ((value >> 48) & 0xffff) | (reg << 16), | |
1223 | (bfd_byte *) datap + offs + 12); | |
1224 | ||
1225 | return flag; | |
1226 | } | |
1227 | ||
1228 | /* Set the howto pointer for an MMIX ELF reloc (type RELA). */ | |
1229 | ||
1230 | static void | |
1231 | mmix_info_to_howto_rela (abfd, cache_ptr, dst) | |
1232 | bfd *abfd ATTRIBUTE_UNUSED; | |
1233 | arelent *cache_ptr; | |
947216bf | 1234 | Elf_Internal_Rela *dst; |
3c3bdf30 NC |
1235 | { |
1236 | unsigned int r_type; | |
1237 | ||
1238 | r_type = ELF64_R_TYPE (dst->r_info); | |
1239 | BFD_ASSERT (r_type < (unsigned int) R_MMIX_max); | |
1240 | cache_ptr->howto = &elf_mmix_howto_table[r_type]; | |
1241 | } | |
1242 | ||
1243 | /* Any MMIX-specific relocation gets here at assembly time or when linking | |
1244 | to other formats (such as mmo); this is the relocation function from | |
1245 | the reloc_table. We don't get here for final pure ELF linking. */ | |
1246 | ||
1247 | static bfd_reloc_status_type | |
1248 | mmix_elf_reloc (abfd, reloc_entry, symbol, data, input_section, | |
1249 | output_bfd, error_message) | |
1250 | bfd *abfd; | |
1251 | arelent *reloc_entry; | |
1252 | asymbol *symbol; | |
1253 | PTR data; | |
1254 | asection *input_section; | |
1255 | bfd *output_bfd; | |
1256 | char **error_message ATTRIBUTE_UNUSED; | |
1257 | { | |
1258 | bfd_vma relocation; | |
1259 | bfd_reloc_status_type r; | |
1260 | asection *reloc_target_output_section; | |
1261 | bfd_reloc_status_type flag = bfd_reloc_ok; | |
1262 | bfd_vma output_base = 0; | |
1263 | bfd_vma addr; | |
eea6121a | 1264 | bfd_size_type sz; |
3c3bdf30 NC |
1265 | |
1266 | r = bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, | |
1267 | input_section, output_bfd, error_message); | |
1268 | ||
1269 | /* If that was all that was needed (i.e. this isn't a final link, only | |
1270 | some segment adjustments), we're done. */ | |
1271 | if (r != bfd_reloc_continue) | |
1272 | return r; | |
1273 | ||
1274 | if (bfd_is_und_section (symbol->section) | |
1275 | && (symbol->flags & BSF_WEAK) == 0 | |
1276 | && output_bfd == (bfd *) NULL) | |
1277 | return bfd_reloc_undefined; | |
1278 | ||
1279 | /* Is the address of the relocation really within the section? */ | |
eea6121a AM |
1280 | sz = input_section->rawsize ? input_section->rawsize : input_section->size; |
1281 | if (reloc_entry->address > sz) | |
3c3bdf30 NC |
1282 | return bfd_reloc_outofrange; |
1283 | ||
4cc11e76 | 1284 | /* Work out which section the relocation is targeted at and the |
3c3bdf30 NC |
1285 | initial relocation command value. */ |
1286 | ||
1287 | /* Get symbol value. (Common symbols are special.) */ | |
1288 | if (bfd_is_com_section (symbol->section)) | |
1289 | relocation = 0; | |
1290 | else | |
1291 | relocation = symbol->value; | |
1292 | ||
1293 | reloc_target_output_section = bfd_get_output_section (symbol); | |
1294 | ||
1295 | /* Here the variable relocation holds the final address of the symbol we | |
1296 | are relocating against, plus any addend. */ | |
1297 | if (output_bfd) | |
1298 | output_base = 0; | |
1299 | else | |
1300 | output_base = reloc_target_output_section->vma; | |
1301 | ||
1302 | relocation += output_base + symbol->section->output_offset; | |
1303 | ||
1304 | /* Get position of relocation. */ | |
1305 | addr = (reloc_entry->address + input_section->output_section->vma | |
1306 | + input_section->output_offset); | |
1307 | if (output_bfd != (bfd *) NULL) | |
1308 | { | |
1309 | /* Add in supplied addend. */ | |
1310 | relocation += reloc_entry->addend; | |
1311 | ||
1312 | /* This is a partial relocation, and we want to apply the | |
1313 | relocation to the reloc entry rather than the raw data. | |
1314 | Modify the reloc inplace to reflect what we now know. */ | |
1315 | reloc_entry->addend = relocation; | |
1316 | reloc_entry->address += input_section->output_offset; | |
1317 | return flag; | |
1318 | } | |
1319 | ||
1320 | return mmix_final_link_relocate (reloc_entry->howto, input_section, | |
1321 | data, reloc_entry->address, | |
1322 | reloc_entry->addend, relocation, | |
1323 | bfd_asymbol_name (symbol), | |
1324 | reloc_target_output_section); | |
1325 | } | |
e06fcc86 | 1326 | \f |
3c3bdf30 NC |
1327 | /* Relocate an MMIX ELF section. Modified from elf32-fr30.c; look to it |
1328 | for guidance if you're thinking of copying this. */ | |
1329 | ||
b34976b6 | 1330 | static bfd_boolean |
3c3bdf30 NC |
1331 | mmix_elf_relocate_section (output_bfd, info, input_bfd, input_section, |
1332 | contents, relocs, local_syms, local_sections) | |
1333 | bfd *output_bfd ATTRIBUTE_UNUSED; | |
1334 | struct bfd_link_info *info; | |
1335 | bfd *input_bfd; | |
1336 | asection *input_section; | |
1337 | bfd_byte *contents; | |
1338 | Elf_Internal_Rela *relocs; | |
1339 | Elf_Internal_Sym *local_syms; | |
1340 | asection **local_sections; | |
1341 | { | |
1342 | Elf_Internal_Shdr *symtab_hdr; | |
1343 | struct elf_link_hash_entry **sym_hashes; | |
1344 | Elf_Internal_Rela *rel; | |
1345 | Elf_Internal_Rela *relend; | |
eea6121a AM |
1346 | bfd_size_type size |
1347 | = (input_section->size | |
1348 | - (mmix_elf_section_data (input_section)->pjs.n_pushj_relocs | |
1349 | * MAX_PUSHJ_STUB_SIZE)); | |
f60ebe14 | 1350 | size_t pjsno = 0; |
3c3bdf30 NC |
1351 | |
1352 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; | |
1353 | sym_hashes = elf_sym_hashes (input_bfd); | |
1354 | relend = relocs + input_section->reloc_count; | |
1355 | ||
1356 | for (rel = relocs; rel < relend; rel ++) | |
1357 | { | |
1358 | reloc_howto_type *howto; | |
1359 | unsigned long r_symndx; | |
1360 | Elf_Internal_Sym *sym; | |
1361 | asection *sec; | |
1362 | struct elf_link_hash_entry *h; | |
1363 | bfd_vma relocation; | |
1364 | bfd_reloc_status_type r; | |
1365 | const char *name = NULL; | |
1366 | int r_type; | |
b34976b6 | 1367 | bfd_boolean undefined_signalled = FALSE; |
3c3bdf30 NC |
1368 | |
1369 | r_type = ELF64_R_TYPE (rel->r_info); | |
1370 | ||
1371 | if (r_type == R_MMIX_GNU_VTINHERIT | |
1372 | || r_type == R_MMIX_GNU_VTENTRY) | |
1373 | continue; | |
1374 | ||
1375 | r_symndx = ELF64_R_SYM (rel->r_info); | |
1376 | ||
1049f94e | 1377 | if (info->relocatable) |
3c3bdf30 | 1378 | { |
f60ebe14 HPN |
1379 | /* This is a relocatable link. For most relocs we don't have to |
1380 | change anything, unless the reloc is against a section | |
1381 | symbol, in which case we have to adjust according to where | |
1382 | the section symbol winds up in the output section. */ | |
3c3bdf30 NC |
1383 | if (r_symndx < symtab_hdr->sh_info) |
1384 | { | |
1385 | sym = local_syms + r_symndx; | |
1386 | ||
1387 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1388 | { | |
1389 | sec = local_sections [r_symndx]; | |
1390 | rel->r_addend += sec->output_offset + sym->st_value; | |
1391 | } | |
1392 | } | |
1393 | ||
f60ebe14 HPN |
1394 | /* For PUSHJ stub relocs however, we may need to change the |
1395 | reloc and the section contents, if the reloc doesn't reach | |
1396 | beyond the end of the output section and previous stubs. | |
1397 | Then we change the section contents to be a PUSHJ to the end | |
1398 | of the input section plus stubs (we can do that without using | |
1399 | a reloc), and then we change the reloc to be a R_MMIX_PUSHJ | |
1400 | at the stub location. */ | |
1401 | if (r_type == R_MMIX_PUSHJ_STUBBABLE) | |
1402 | { | |
1403 | /* We've already checked whether we need a stub; use that | |
1404 | knowledge. */ | |
1405 | if (mmix_elf_section_data (input_section)->pjs.stub_size[pjsno] | |
1406 | != 0) | |
1407 | { | |
1408 | Elf_Internal_Rela relcpy; | |
1409 | ||
1410 | if (mmix_elf_section_data (input_section) | |
1411 | ->pjs.stub_size[pjsno] != MAX_PUSHJ_STUB_SIZE) | |
1412 | abort (); | |
1413 | ||
1414 | /* There's already a PUSHJ insn there, so just fill in | |
1415 | the offset bits to the stub. */ | |
1416 | if (mmix_final_link_relocate (elf_mmix_howto_table | |
1417 | + R_MMIX_ADDR19, | |
1418 | input_section, | |
1419 | contents, | |
1420 | rel->r_offset, | |
1421 | 0, | |
1422 | input_section | |
1423 | ->output_section->vma | |
1424 | + input_section->output_offset | |
eea6121a | 1425 | + size |
f60ebe14 HPN |
1426 | + mmix_elf_section_data (input_section) |
1427 | ->pjs.stub_offset, | |
1428 | NULL, NULL) != bfd_reloc_ok) | |
1429 | return FALSE; | |
1430 | ||
1431 | /* Put a JMP insn at the stub; it goes with the | |
1432 | R_MMIX_JMP reloc. */ | |
1433 | bfd_put_32 (output_bfd, JMP_INSN_BYTE << 24, | |
1434 | contents | |
eea6121a | 1435 | + size |
f60ebe14 HPN |
1436 | + mmix_elf_section_data (input_section) |
1437 | ->pjs.stub_offset); | |
1438 | ||
1439 | /* Change the reloc to be at the stub, and to a full | |
1440 | R_MMIX_JMP reloc. */ | |
1441 | rel->r_info = ELF64_R_INFO (r_symndx, R_MMIX_JMP); | |
1442 | rel->r_offset | |
eea6121a | 1443 | = (size |
f60ebe14 HPN |
1444 | + mmix_elf_section_data (input_section) |
1445 | ->pjs.stub_offset); | |
1446 | ||
1447 | mmix_elf_section_data (input_section)->pjs.stub_offset | |
1448 | += MAX_PUSHJ_STUB_SIZE; | |
1449 | ||
1450 | /* Shift this reloc to the end of the relocs to maintain | |
1451 | the r_offset sorted reloc order. */ | |
1452 | relcpy = *rel; | |
1453 | memmove (rel, rel + 1, (char *) relend - (char *) rel); | |
1454 | relend[-1] = relcpy; | |
1455 | ||
1456 | /* Back up one reloc, or else we'd skip the next reloc | |
1457 | in turn. */ | |
1458 | rel--; | |
1459 | } | |
1460 | ||
1461 | pjsno++; | |
1462 | } | |
3c3bdf30 NC |
1463 | continue; |
1464 | } | |
1465 | ||
1466 | /* This is a final link. */ | |
1467 | howto = elf_mmix_howto_table + ELF64_R_TYPE (rel->r_info); | |
1468 | h = NULL; | |
1469 | sym = NULL; | |
1470 | sec = NULL; | |
1471 | ||
1472 | if (r_symndx < symtab_hdr->sh_info) | |
1473 | { | |
1474 | sym = local_syms + r_symndx; | |
1475 | sec = local_sections [r_symndx]; | |
8517fae7 | 1476 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
3c3bdf30 | 1477 | |
6a9cae7f AM |
1478 | name = bfd_elf_string_from_elf_section (input_bfd, |
1479 | symtab_hdr->sh_link, | |
1480 | sym->st_name); | |
1481 | if (name == NULL) | |
1482 | name = bfd_section_name (input_bfd, sec); | |
3c3bdf30 NC |
1483 | } |
1484 | else | |
1485 | { | |
59c2e50f | 1486 | bfd_boolean unresolved_reloc; |
3c3bdf30 | 1487 | |
b2a8e766 AM |
1488 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
1489 | r_symndx, symtab_hdr, sym_hashes, | |
1490 | h, sec, relocation, | |
1491 | unresolved_reloc, undefined_signalled); | |
6a9cae7f | 1492 | name = h->root.root.string; |
3c3bdf30 NC |
1493 | } |
1494 | ||
1495 | r = mmix_final_link_relocate (howto, input_section, | |
1496 | contents, rel->r_offset, | |
1497 | rel->r_addend, relocation, name, sec); | |
1498 | ||
1499 | if (r != bfd_reloc_ok) | |
1500 | { | |
b34976b6 | 1501 | bfd_boolean check_ok = TRUE; |
3c3bdf30 NC |
1502 | const char * msg = (const char *) NULL; |
1503 | ||
1504 | switch (r) | |
1505 | { | |
1506 | case bfd_reloc_overflow: | |
1507 | check_ok = info->callbacks->reloc_overflow | |
1508 | (info, name, howto->name, (bfd_vma) 0, | |
1509 | input_bfd, input_section, rel->r_offset); | |
1510 | break; | |
1511 | ||
1512 | case bfd_reloc_undefined: | |
1513 | /* We may have sent this message above. */ | |
1514 | if (! undefined_signalled) | |
1515 | check_ok = info->callbacks->undefined_symbol | |
1516 | (info, name, input_bfd, input_section, rel->r_offset, | |
b34976b6 AM |
1517 | TRUE); |
1518 | undefined_signalled = TRUE; | |
3c3bdf30 NC |
1519 | break; |
1520 | ||
1521 | case bfd_reloc_outofrange: | |
1522 | msg = _("internal error: out of range error"); | |
1523 | break; | |
1524 | ||
1525 | case bfd_reloc_notsupported: | |
1526 | msg = _("internal error: unsupported relocation error"); | |
1527 | break; | |
1528 | ||
1529 | case bfd_reloc_dangerous: | |
1530 | msg = _("internal error: dangerous relocation"); | |
1531 | break; | |
1532 | ||
1533 | default: | |
1534 | msg = _("internal error: unknown error"); | |
1535 | break; | |
1536 | } | |
1537 | ||
1538 | if (msg) | |
1539 | check_ok = info->callbacks->warning | |
1540 | (info, msg, name, input_bfd, input_section, rel->r_offset); | |
1541 | ||
1542 | if (! check_ok) | |
b34976b6 | 1543 | return FALSE; |
3c3bdf30 NC |
1544 | } |
1545 | } | |
1546 | ||
b34976b6 | 1547 | return TRUE; |
3c3bdf30 | 1548 | } |
e06fcc86 | 1549 | \f |
3c3bdf30 NC |
1550 | /* Perform a single relocation. By default we use the standard BFD |
1551 | routines. A few relocs we have to do ourselves. */ | |
1552 | ||
1553 | static bfd_reloc_status_type | |
1554 | mmix_final_link_relocate (howto, input_section, contents, | |
1555 | r_offset, r_addend, relocation, symname, symsec) | |
1556 | reloc_howto_type *howto; | |
1557 | asection *input_section; | |
1558 | bfd_byte *contents; | |
1559 | bfd_vma r_offset; | |
1560 | bfd_signed_vma r_addend; | |
1561 | bfd_vma relocation; | |
1562 | const char *symname; | |
1563 | asection *symsec; | |
1564 | { | |
1565 | bfd_reloc_status_type r = bfd_reloc_ok; | |
1566 | bfd_vma addr | |
1567 | = (input_section->output_section->vma | |
1568 | + input_section->output_offset | |
1569 | + r_offset); | |
1570 | bfd_signed_vma srel | |
1571 | = (bfd_signed_vma) relocation + r_addend; | |
1572 | ||
1573 | switch (howto->type) | |
1574 | { | |
1575 | /* All these are PC-relative. */ | |
f60ebe14 | 1576 | case R_MMIX_PUSHJ_STUBBABLE: |
3c3bdf30 NC |
1577 | case R_MMIX_PUSHJ: |
1578 | case R_MMIX_CBRANCH: | |
1579 | case R_MMIX_ADDR19: | |
1580 | case R_MMIX_GETA: | |
1581 | case R_MMIX_ADDR27: | |
1582 | case R_MMIX_JMP: | |
1583 | contents += r_offset; | |
1584 | ||
1585 | srel -= (input_section->output_section->vma | |
1586 | + input_section->output_offset | |
1587 | + r_offset); | |
1588 | ||
1589 | r = mmix_elf_perform_relocation (input_section, howto, contents, | |
1590 | addr, srel); | |
1591 | break; | |
1592 | ||
930b4cb2 HPN |
1593 | case R_MMIX_BASE_PLUS_OFFSET: |
1594 | if (symsec == NULL) | |
1595 | return bfd_reloc_undefined; | |
1596 | ||
1597 | /* Check that we're not relocating against a register symbol. */ | |
1598 | if (strcmp (bfd_get_section_name (symsec->owner, symsec), | |
1599 | MMIX_REG_CONTENTS_SECTION_NAME) == 0 | |
1600 | || strcmp (bfd_get_section_name (symsec->owner, symsec), | |
1601 | MMIX_REG_SECTION_NAME) == 0) | |
1602 | { | |
1603 | /* Note: This is separated out into two messages in order | |
1604 | to ease the translation into other languages. */ | |
1605 | if (symname == NULL || *symname == 0) | |
1606 | (*_bfd_error_handler) | |
1607 | (_("%s: base-plus-offset relocation against register symbol: (unknown) in %s"), | |
1608 | bfd_get_filename (input_section->owner), | |
1609 | bfd_get_section_name (symsec->owner, symsec)); | |
1610 | else | |
1611 | (*_bfd_error_handler) | |
1612 | (_("%s: base-plus-offset relocation against register symbol: %s in %s"), | |
1613 | bfd_get_filename (input_section->owner), symname, | |
1614 | bfd_get_section_name (symsec->owner, symsec)); | |
1615 | return bfd_reloc_overflow; | |
1616 | } | |
1617 | goto do_mmix_reloc; | |
1618 | ||
3c3bdf30 NC |
1619 | case R_MMIX_REG_OR_BYTE: |
1620 | case R_MMIX_REG: | |
1621 | /* For now, we handle these alike. They must refer to an register | |
1622 | symbol, which is either relative to the register section and in | |
1623 | the range 0..255, or is in the register contents section with vma | |
1624 | regno * 8. */ | |
1625 | ||
1626 | /* FIXME: A better way to check for reg contents section? | |
1627 | FIXME: Postpone section->scaling to mmix_elf_perform_relocation? */ | |
1628 | if (symsec == NULL) | |
1629 | return bfd_reloc_undefined; | |
1630 | ||
1631 | if (strcmp (bfd_get_section_name (symsec->owner, symsec), | |
1632 | MMIX_REG_CONTENTS_SECTION_NAME) == 0) | |
1633 | { | |
1634 | if ((srel & 7) != 0 || srel < 32*8 || srel > 255*8) | |
1635 | { | |
1636 | /* The bfd_reloc_outofrange return value, though intuitively | |
1637 | a better value, will not get us an error. */ | |
1638 | return bfd_reloc_overflow; | |
1639 | } | |
1640 | srel /= 8; | |
1641 | } | |
1642 | else if (strcmp (bfd_get_section_name (symsec->owner, symsec), | |
1643 | MMIX_REG_SECTION_NAME) == 0) | |
1644 | { | |
1645 | if (srel < 0 || srel > 255) | |
1646 | /* The bfd_reloc_outofrange return value, though intuitively a | |
1647 | better value, will not get us an error. */ | |
1648 | return bfd_reloc_overflow; | |
1649 | } | |
1650 | else | |
1651 | { | |
930b4cb2 | 1652 | /* Note: This is separated out into two messages in order |
ca09e32b NC |
1653 | to ease the translation into other languages. */ |
1654 | if (symname == NULL || *symname == 0) | |
1655 | (*_bfd_error_handler) | |
1656 | (_("%s: register relocation against non-register symbol: (unknown) in %s"), | |
1657 | bfd_get_filename (input_section->owner), | |
1658 | bfd_get_section_name (symsec->owner, symsec)); | |
1659 | else | |
1660 | (*_bfd_error_handler) | |
1661 | (_("%s: register relocation against non-register symbol: %s in %s"), | |
1662 | bfd_get_filename (input_section->owner), symname, | |
1663 | bfd_get_section_name (symsec->owner, symsec)); | |
3c3bdf30 NC |
1664 | |
1665 | /* The bfd_reloc_outofrange return value, though intuitively a | |
1666 | better value, will not get us an error. */ | |
1667 | return bfd_reloc_overflow; | |
1668 | } | |
930b4cb2 | 1669 | do_mmix_reloc: |
3c3bdf30 NC |
1670 | contents += r_offset; |
1671 | r = mmix_elf_perform_relocation (input_section, howto, contents, | |
1672 | addr, srel); | |
1673 | break; | |
1674 | ||
1675 | case R_MMIX_LOCAL: | |
1676 | /* This isn't a real relocation, it's just an assertion that the | |
1677 | final relocation value corresponds to a local register. We | |
1678 | ignore the actual relocation; nothing is changed. */ | |
1679 | { | |
1680 | asection *regsec | |
1681 | = bfd_get_section_by_name (input_section->output_section->owner, | |
1682 | MMIX_REG_CONTENTS_SECTION_NAME); | |
1683 | bfd_vma first_global; | |
1684 | ||
1685 | /* Check that this is an absolute value, or a reference to the | |
1686 | register contents section or the register (symbol) section. | |
1687 | Absolute numbers can get here as undefined section. Undefined | |
1688 | symbols are signalled elsewhere, so there's no conflict in us | |
1689 | accidentally handling it. */ | |
1690 | if (!bfd_is_abs_section (symsec) | |
1691 | && !bfd_is_und_section (symsec) | |
1692 | && strcmp (bfd_get_section_name (symsec->owner, symsec), | |
1693 | MMIX_REG_CONTENTS_SECTION_NAME) != 0 | |
1694 | && strcmp (bfd_get_section_name (symsec->owner, symsec), | |
1695 | MMIX_REG_SECTION_NAME) != 0) | |
1696 | { | |
1697 | (*_bfd_error_handler) | |
1698 | (_("%s: directive LOCAL valid only with a register or absolute value"), | |
1699 | bfd_get_filename (input_section->owner)); | |
1700 | ||
1701 | return bfd_reloc_overflow; | |
1702 | } | |
1703 | ||
1704 | /* If we don't have a register contents section, then $255 is the | |
1705 | first global register. */ | |
1706 | if (regsec == NULL) | |
1707 | first_global = 255; | |
1708 | else | |
1709 | { | |
1710 | first_global = bfd_get_section_vma (abfd, regsec) / 8; | |
1711 | if (strcmp (bfd_get_section_name (symsec->owner, symsec), | |
1712 | MMIX_REG_CONTENTS_SECTION_NAME) == 0) | |
1713 | { | |
1714 | if ((srel & 7) != 0 || srel < 32*8 || srel > 255*8) | |
1715 | /* The bfd_reloc_outofrange return value, though | |
1716 | intuitively a better value, will not get us an error. */ | |
1717 | return bfd_reloc_overflow; | |
1718 | srel /= 8; | |
1719 | } | |
1720 | } | |
1721 | ||
1722 | if ((bfd_vma) srel >= first_global) | |
1723 | { | |
1724 | /* FIXME: Better error message. */ | |
1725 | (*_bfd_error_handler) | |
1726 | (_("%s: LOCAL directive: Register $%ld is not a local register. First global register is $%ld."), | |
1727 | bfd_get_filename (input_section->owner), (long) srel, (long) first_global); | |
1728 | ||
1729 | return bfd_reloc_overflow; | |
1730 | } | |
1731 | } | |
1732 | r = bfd_reloc_ok; | |
1733 | break; | |
1734 | ||
1735 | default: | |
1736 | r = _bfd_final_link_relocate (howto, input_section->owner, input_section, | |
1737 | contents, r_offset, | |
1738 | relocation, r_addend); | |
1739 | } | |
1740 | ||
1741 | return r; | |
1742 | } | |
e06fcc86 | 1743 | \f |
3c3bdf30 NC |
1744 | /* Return the section that should be marked against GC for a given |
1745 | relocation. */ | |
1746 | ||
1747 | static asection * | |
1e2f5b6e AM |
1748 | mmix_elf_gc_mark_hook (sec, info, rel, h, sym) |
1749 | asection *sec; | |
3c3bdf30 NC |
1750 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
1751 | Elf_Internal_Rela *rel; | |
1752 | struct elf_link_hash_entry *h; | |
1753 | Elf_Internal_Sym *sym; | |
1754 | { | |
1755 | if (h != NULL) | |
1756 | { | |
1757 | switch (ELF64_R_TYPE (rel->r_info)) | |
1758 | { | |
1759 | case R_MMIX_GNU_VTINHERIT: | |
1760 | case R_MMIX_GNU_VTENTRY: | |
1761 | break; | |
1762 | ||
1763 | default: | |
1764 | switch (h->root.type) | |
1765 | { | |
1766 | case bfd_link_hash_defined: | |
1767 | case bfd_link_hash_defweak: | |
1768 | return h->root.u.def.section; | |
1769 | ||
1770 | case bfd_link_hash_common: | |
1771 | return h->root.u.c.p->section; | |
1772 | ||
1773 | default: | |
1774 | break; | |
1775 | } | |
1776 | } | |
1777 | } | |
1778 | else | |
1e2f5b6e | 1779 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
3c3bdf30 NC |
1780 | |
1781 | return NULL; | |
1782 | } | |
930b4cb2 HPN |
1783 | |
1784 | /* Update relocation info for a GC-excluded section. We could supposedly | |
1785 | perform the allocation after GC, but there's no suitable hook between | |
1786 | GC (or section merge) and the point when all input sections must be | |
1787 | present. Better to waste some memory and (perhaps) a little time. */ | |
1788 | ||
b34976b6 | 1789 | static bfd_boolean |
930b4cb2 HPN |
1790 | mmix_elf_gc_sweep_hook (abfd, info, sec, relocs) |
1791 | bfd *abfd ATTRIBUTE_UNUSED; | |
1792 | struct bfd_link_info *info ATTRIBUTE_UNUSED; | |
1793 | asection *sec ATTRIBUTE_UNUSED; | |
1794 | const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED; | |
1795 | { | |
1796 | struct bpo_reloc_section_info *bpodata | |
f0abc2a1 | 1797 | = mmix_elf_section_data (sec)->bpo.reloc; |
930b4cb2 HPN |
1798 | asection *allocated_gregs_section; |
1799 | ||
1800 | /* If no bpodata here, we have nothing to do. */ | |
1801 | if (bpodata == NULL) | |
b34976b6 | 1802 | return TRUE; |
930b4cb2 HPN |
1803 | |
1804 | allocated_gregs_section = bpodata->bpo_greg_section; | |
1805 | ||
f0abc2a1 | 1806 | mmix_elf_section_data (allocated_gregs_section)->bpo.greg->n_bpo_relocs |
930b4cb2 HPN |
1807 | -= bpodata->n_bpo_relocs_this_section; |
1808 | ||
b34976b6 | 1809 | return TRUE; |
930b4cb2 | 1810 | } |
e06fcc86 | 1811 | \f |
3c3bdf30 NC |
1812 | /* Sort register relocs to come before expanding relocs. */ |
1813 | ||
1814 | static int | |
1815 | mmix_elf_sort_relocs (p1, p2) | |
1816 | const PTR p1; | |
1817 | const PTR p2; | |
1818 | { | |
1819 | const Elf_Internal_Rela *r1 = (const Elf_Internal_Rela *) p1; | |
1820 | const Elf_Internal_Rela *r2 = (const Elf_Internal_Rela *) p2; | |
1821 | int r1_is_reg, r2_is_reg; | |
1822 | ||
1823 | /* Sort primarily on r_offset & ~3, so relocs are done to consecutive | |
1824 | insns. */ | |
1825 | if ((r1->r_offset & ~(bfd_vma) 3) > (r2->r_offset & ~(bfd_vma) 3)) | |
1826 | return 1; | |
1827 | else if ((r1->r_offset & ~(bfd_vma) 3) < (r2->r_offset & ~(bfd_vma) 3)) | |
1828 | return -1; | |
1829 | ||
1830 | r1_is_reg | |
1831 | = (ELF64_R_TYPE (r1->r_info) == R_MMIX_REG_OR_BYTE | |
1832 | || ELF64_R_TYPE (r1->r_info) == R_MMIX_REG); | |
1833 | r2_is_reg | |
1834 | = (ELF64_R_TYPE (r2->r_info) == R_MMIX_REG_OR_BYTE | |
1835 | || ELF64_R_TYPE (r2->r_info) == R_MMIX_REG); | |
1836 | if (r1_is_reg != r2_is_reg) | |
1837 | return r2_is_reg - r1_is_reg; | |
1838 | ||
1839 | /* Neither or both are register relocs. Then sort on full offset. */ | |
1840 | if (r1->r_offset > r2->r_offset) | |
1841 | return 1; | |
1842 | else if (r1->r_offset < r2->r_offset) | |
1843 | return -1; | |
1844 | return 0; | |
1845 | } | |
1846 | ||
930b4cb2 HPN |
1847 | /* Subset of mmix_elf_check_relocs, common to ELF and mmo linking. */ |
1848 | ||
b34976b6 | 1849 | static bfd_boolean |
930b4cb2 HPN |
1850 | mmix_elf_check_common_relocs (abfd, info, sec, relocs) |
1851 | bfd *abfd; | |
1852 | struct bfd_link_info *info; | |
1853 | asection *sec; | |
1854 | const Elf_Internal_Rela *relocs; | |
1855 | { | |
1856 | bfd *bpo_greg_owner = NULL; | |
1857 | asection *allocated_gregs_section = NULL; | |
1858 | struct bpo_greg_section_info *gregdata = NULL; | |
1859 | struct bpo_reloc_section_info *bpodata = NULL; | |
1860 | const Elf_Internal_Rela *rel; | |
1861 | const Elf_Internal_Rela *rel_end; | |
1862 | ||
930b4cb2 HPN |
1863 | /* We currently have to abuse this COFF-specific member, since there's |
1864 | no target-machine-dedicated member. There's no alternative outside | |
1865 | the bfd_link_info struct; we can't specialize a hash-table since | |
1866 | they're different between ELF and mmo. */ | |
1867 | bpo_greg_owner = (bfd *) info->base_file; | |
1868 | ||
1869 | rel_end = relocs + sec->reloc_count; | |
1870 | for (rel = relocs; rel < rel_end; rel++) | |
1871 | { | |
1872 | switch (ELF64_R_TYPE (rel->r_info)) | |
1873 | { | |
1874 | /* This relocation causes a GREG allocation. We need to count | |
1875 | them, and we need to create a section for them, so we need an | |
1876 | object to fake as the owner of that section. We can't use | |
1877 | the ELF dynobj for this, since the ELF bits assume lots of | |
1878 | DSO-related stuff if that member is non-NULL. */ | |
1879 | case R_MMIX_BASE_PLUS_OFFSET: | |
f60ebe14 HPN |
1880 | /* We don't do anything with this reloc for a relocatable link. */ |
1881 | if (info->relocatable) | |
1882 | break; | |
1883 | ||
930b4cb2 HPN |
1884 | if (bpo_greg_owner == NULL) |
1885 | { | |
1886 | bpo_greg_owner = abfd; | |
1887 | info->base_file = (PTR) bpo_greg_owner; | |
1888 | } | |
1889 | ||
4fa5c2a8 HPN |
1890 | if (allocated_gregs_section == NULL) |
1891 | allocated_gregs_section | |
1892 | = bfd_get_section_by_name (bpo_greg_owner, | |
1893 | MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME); | |
1894 | ||
930b4cb2 HPN |
1895 | if (allocated_gregs_section == NULL) |
1896 | { | |
1897 | allocated_gregs_section | |
1898 | = bfd_make_section (bpo_greg_owner, | |
1899 | MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME); | |
1900 | /* Setting both SEC_ALLOC and SEC_LOAD means the section is | |
1901 | treated like any other section, and we'd get errors for | |
1902 | address overlap with the text section. Let's set none of | |
1903 | those flags, as that is what currently happens for usual | |
1904 | GREG allocations, and that works. */ | |
1905 | if (allocated_gregs_section == NULL | |
1906 | || !bfd_set_section_flags (bpo_greg_owner, | |
1907 | allocated_gregs_section, | |
1908 | (SEC_HAS_CONTENTS | |
1909 | | SEC_IN_MEMORY | |
1910 | | SEC_LINKER_CREATED)) | |
1911 | || !bfd_set_section_alignment (bpo_greg_owner, | |
1912 | allocated_gregs_section, | |
1913 | 3)) | |
b34976b6 | 1914 | return FALSE; |
930b4cb2 HPN |
1915 | |
1916 | gregdata = (struct bpo_greg_section_info *) | |
1917 | bfd_zalloc (bpo_greg_owner, sizeof (struct bpo_greg_section_info)); | |
1918 | if (gregdata == NULL) | |
b34976b6 | 1919 | return FALSE; |
f0abc2a1 AM |
1920 | mmix_elf_section_data (allocated_gregs_section)->bpo.greg |
1921 | = gregdata; | |
930b4cb2 HPN |
1922 | } |
1923 | else if (gregdata == NULL) | |
f0abc2a1 AM |
1924 | gregdata |
1925 | = mmix_elf_section_data (allocated_gregs_section)->bpo.greg; | |
930b4cb2 HPN |
1926 | |
1927 | /* Get ourselves some auxiliary info for the BPO-relocs. */ | |
1928 | if (bpodata == NULL) | |
1929 | { | |
1930 | /* No use doing a separate iteration pass to find the upper | |
1931 | limit - just use the number of relocs. */ | |
1932 | bpodata = (struct bpo_reloc_section_info *) | |
1933 | bfd_alloc (bpo_greg_owner, | |
1934 | sizeof (struct bpo_reloc_section_info) | |
1935 | * (sec->reloc_count + 1)); | |
1936 | if (bpodata == NULL) | |
b34976b6 | 1937 | return FALSE; |
f0abc2a1 | 1938 | mmix_elf_section_data (sec)->bpo.reloc = bpodata; |
930b4cb2 HPN |
1939 | bpodata->first_base_plus_offset_reloc |
1940 | = bpodata->bpo_index | |
1941 | = gregdata->n_max_bpo_relocs; | |
1942 | bpodata->bpo_greg_section | |
1943 | = allocated_gregs_section; | |
4fa5c2a8 | 1944 | bpodata->n_bpo_relocs_this_section = 0; |
930b4cb2 HPN |
1945 | } |
1946 | ||
1947 | bpodata->n_bpo_relocs_this_section++; | |
1948 | gregdata->n_max_bpo_relocs++; | |
1949 | ||
1950 | /* We don't get another chance to set this before GC; we've not | |
f60ebe14 | 1951 | set up any hook that runs before GC. */ |
930b4cb2 HPN |
1952 | gregdata->n_bpo_relocs |
1953 | = gregdata->n_max_bpo_relocs; | |
1954 | break; | |
f60ebe14 HPN |
1955 | |
1956 | case R_MMIX_PUSHJ_STUBBABLE: | |
1957 | mmix_elf_section_data (sec)->pjs.n_pushj_relocs++; | |
1958 | break; | |
930b4cb2 HPN |
1959 | } |
1960 | } | |
1961 | ||
f60ebe14 HPN |
1962 | /* Allocate per-reloc stub storage and initialize it to the max stub |
1963 | size. */ | |
1964 | if (mmix_elf_section_data (sec)->pjs.n_pushj_relocs != 0) | |
1965 | { | |
1966 | size_t i; | |
1967 | ||
1968 | mmix_elf_section_data (sec)->pjs.stub_size | |
1969 | = bfd_alloc (abfd, mmix_elf_section_data (sec)->pjs.n_pushj_relocs | |
1970 | * sizeof (mmix_elf_section_data (sec) | |
1971 | ->pjs.stub_size[0])); | |
1972 | if (mmix_elf_section_data (sec)->pjs.stub_size == NULL) | |
1973 | return FALSE; | |
1974 | ||
1975 | for (i = 0; i < mmix_elf_section_data (sec)->pjs.n_pushj_relocs; i++) | |
1976 | mmix_elf_section_data (sec)->pjs.stub_size[i] = MAX_PUSHJ_STUB_SIZE; | |
1977 | } | |
1978 | ||
b34976b6 | 1979 | return TRUE; |
930b4cb2 HPN |
1980 | } |
1981 | ||
3c3bdf30 NC |
1982 | /* Look through the relocs for a section during the first phase. */ |
1983 | ||
b34976b6 | 1984 | static bfd_boolean |
3c3bdf30 NC |
1985 | mmix_elf_check_relocs (abfd, info, sec, relocs) |
1986 | bfd *abfd; | |
1987 | struct bfd_link_info *info; | |
1988 | asection *sec; | |
1989 | const Elf_Internal_Rela *relocs; | |
1990 | { | |
1991 | Elf_Internal_Shdr *symtab_hdr; | |
1992 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
1993 | const Elf_Internal_Rela *rel; | |
1994 | const Elf_Internal_Rela *rel_end; | |
1995 | ||
3c3bdf30 NC |
1996 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
1997 | sym_hashes = elf_sym_hashes (abfd); | |
1998 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf64_External_Sym); | |
1999 | if (!elf_bad_symtab (abfd)) | |
2000 | sym_hashes_end -= symtab_hdr->sh_info; | |
2001 | ||
2002 | /* First we sort the relocs so that any register relocs come before | |
2003 | expansion-relocs to the same insn. FIXME: Not done for mmo. */ | |
2004 | qsort ((PTR) relocs, sec->reloc_count, sizeof (Elf_Internal_Rela), | |
2005 | mmix_elf_sort_relocs); | |
2006 | ||
930b4cb2 HPN |
2007 | /* Do the common part. */ |
2008 | if (!mmix_elf_check_common_relocs (abfd, info, sec, relocs)) | |
b34976b6 | 2009 | return FALSE; |
930b4cb2 | 2010 | |
f60ebe14 HPN |
2011 | if (info->relocatable) |
2012 | return TRUE; | |
2013 | ||
3c3bdf30 NC |
2014 | rel_end = relocs + sec->reloc_count; |
2015 | for (rel = relocs; rel < rel_end; rel++) | |
2016 | { | |
2017 | struct elf_link_hash_entry *h; | |
2018 | unsigned long r_symndx; | |
2019 | ||
2020 | r_symndx = ELF64_R_SYM (rel->r_info); | |
2021 | if (r_symndx < symtab_hdr->sh_info) | |
2022 | h = NULL; | |
2023 | else | |
2024 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
2025 | ||
2026 | switch (ELF64_R_TYPE (rel->r_info)) | |
930b4cb2 | 2027 | { |
3c3bdf30 NC |
2028 | /* This relocation describes the C++ object vtable hierarchy. |
2029 | Reconstruct it for later use during GC. */ | |
2030 | case R_MMIX_GNU_VTINHERIT: | |
c152c796 | 2031 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
b34976b6 | 2032 | return FALSE; |
3c3bdf30 NC |
2033 | break; |
2034 | ||
2035 | /* This relocation describes which C++ vtable entries are actually | |
2036 | used. Record for later use during GC. */ | |
2037 | case R_MMIX_GNU_VTENTRY: | |
c152c796 | 2038 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
b34976b6 | 2039 | return FALSE; |
3c3bdf30 | 2040 | break; |
930b4cb2 HPN |
2041 | } |
2042 | } | |
2043 | ||
b34976b6 | 2044 | return TRUE; |
930b4cb2 HPN |
2045 | } |
2046 | ||
2047 | /* Wrapper for mmix_elf_check_common_relocs, called when linking to mmo. | |
2048 | Copied from elf_link_add_object_symbols. */ | |
2049 | ||
b34976b6 | 2050 | bfd_boolean |
930b4cb2 HPN |
2051 | _bfd_mmix_check_all_relocs (abfd, info) |
2052 | bfd *abfd; | |
2053 | struct bfd_link_info *info; | |
2054 | { | |
2055 | asection *o; | |
2056 | ||
2057 | for (o = abfd->sections; o != NULL; o = o->next) | |
2058 | { | |
2059 | Elf_Internal_Rela *internal_relocs; | |
b34976b6 | 2060 | bfd_boolean ok; |
930b4cb2 HPN |
2061 | |
2062 | if ((o->flags & SEC_RELOC) == 0 | |
2063 | || o->reloc_count == 0 | |
2064 | || ((info->strip == strip_all || info->strip == strip_debugger) | |
2065 | && (o->flags & SEC_DEBUGGING) != 0) | |
2066 | || bfd_is_abs_section (o->output_section)) | |
2067 | continue; | |
2068 | ||
2069 | internal_relocs | |
45d6a902 AM |
2070 | = _bfd_elf_link_read_relocs (abfd, o, (PTR) NULL, |
2071 | (Elf_Internal_Rela *) NULL, | |
2072 | info->keep_memory); | |
930b4cb2 | 2073 | if (internal_relocs == NULL) |
b34976b6 | 2074 | return FALSE; |
930b4cb2 HPN |
2075 | |
2076 | ok = mmix_elf_check_common_relocs (abfd, info, o, internal_relocs); | |
2077 | ||
2078 | if (! info->keep_memory) | |
2079 | free (internal_relocs); | |
2080 | ||
2081 | if (! ok) | |
b34976b6 | 2082 | return FALSE; |
3c3bdf30 NC |
2083 | } |
2084 | ||
b34976b6 | 2085 | return TRUE; |
3c3bdf30 | 2086 | } |
e06fcc86 | 2087 | \f |
3c3bdf30 NC |
2088 | /* Change symbols relative to the reg contents section to instead be to |
2089 | the register section, and scale them down to correspond to the register | |
2090 | number. */ | |
2091 | ||
b34976b6 | 2092 | static bfd_boolean |
754021d0 | 2093 | mmix_elf_link_output_symbol_hook (info, name, sym, input_sec, h) |
3c3bdf30 NC |
2094 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
2095 | const char *name ATTRIBUTE_UNUSED; | |
2096 | Elf_Internal_Sym *sym; | |
2097 | asection *input_sec; | |
754021d0 | 2098 | struct elf_link_hash_entry *h ATTRIBUTE_UNUSED; |
3c3bdf30 NC |
2099 | { |
2100 | if (input_sec != NULL | |
2101 | && input_sec->name != NULL | |
2102 | && ELF_ST_TYPE (sym->st_info) != STT_SECTION | |
2103 | && strcmp (input_sec->name, MMIX_REG_CONTENTS_SECTION_NAME) == 0) | |
2104 | { | |
2105 | sym->st_value /= 8; | |
2106 | sym->st_shndx = SHN_REGISTER; | |
2107 | } | |
2108 | ||
b34976b6 | 2109 | return TRUE; |
3c3bdf30 NC |
2110 | } |
2111 | ||
2112 | /* We fake a register section that holds values that are register numbers. | |
2113 | Having a SHN_REGISTER and register section translates better to other | |
2114 | formats (e.g. mmo) than for example a STT_REGISTER attribute. | |
2115 | This section faking is based on a construct in elf32-mips.c. */ | |
2116 | static asection mmix_elf_reg_section; | |
2117 | static asymbol mmix_elf_reg_section_symbol; | |
2118 | static asymbol *mmix_elf_reg_section_symbol_ptr; | |
2119 | ||
f60ebe14 | 2120 | /* Handle the special section numbers that a symbol may use. */ |
3c3bdf30 NC |
2121 | |
2122 | void | |
2123 | mmix_elf_symbol_processing (abfd, asym) | |
2124 | bfd *abfd ATTRIBUTE_UNUSED; | |
2125 | asymbol *asym; | |
2126 | { | |
2127 | elf_symbol_type *elfsym; | |
2128 | ||
2129 | elfsym = (elf_symbol_type *) asym; | |
2130 | switch (elfsym->internal_elf_sym.st_shndx) | |
2131 | { | |
2132 | case SHN_REGISTER: | |
2133 | if (mmix_elf_reg_section.name == NULL) | |
2134 | { | |
2135 | /* Initialize the register section. */ | |
2136 | mmix_elf_reg_section.name = MMIX_REG_SECTION_NAME; | |
2137 | mmix_elf_reg_section.flags = SEC_NO_FLAGS; | |
2138 | mmix_elf_reg_section.output_section = &mmix_elf_reg_section; | |
2139 | mmix_elf_reg_section.symbol = &mmix_elf_reg_section_symbol; | |
2140 | mmix_elf_reg_section.symbol_ptr_ptr = &mmix_elf_reg_section_symbol_ptr; | |
2141 | mmix_elf_reg_section_symbol.name = MMIX_REG_SECTION_NAME; | |
2142 | mmix_elf_reg_section_symbol.flags = BSF_SECTION_SYM; | |
2143 | mmix_elf_reg_section_symbol.section = &mmix_elf_reg_section; | |
2144 | mmix_elf_reg_section_symbol_ptr = &mmix_elf_reg_section_symbol; | |
2145 | } | |
2146 | asym->section = &mmix_elf_reg_section; | |
2147 | break; | |
2148 | ||
2149 | default: | |
2150 | break; | |
2151 | } | |
2152 | } | |
2153 | ||
2154 | /* Given a BFD section, try to locate the corresponding ELF section | |
2155 | index. */ | |
2156 | ||
b34976b6 | 2157 | static bfd_boolean |
af746e92 | 2158 | mmix_elf_section_from_bfd_section (abfd, sec, retval) |
3c3bdf30 | 2159 | bfd * abfd ATTRIBUTE_UNUSED; |
3c3bdf30 NC |
2160 | asection * sec; |
2161 | int * retval; | |
2162 | { | |
2163 | if (strcmp (bfd_get_section_name (abfd, sec), MMIX_REG_SECTION_NAME) == 0) | |
2164 | *retval = SHN_REGISTER; | |
2165 | else | |
b34976b6 | 2166 | return FALSE; |
3c3bdf30 | 2167 | |
b34976b6 | 2168 | return TRUE; |
3c3bdf30 NC |
2169 | } |
2170 | ||
2171 | /* Hook called by the linker routine which adds symbols from an object | |
2172 | file. We must handle the special SHN_REGISTER section number here. | |
2173 | ||
2174 | We also check that we only have *one* each of the section-start | |
2175 | symbols, since otherwise having two with the same value would cause | |
2176 | them to be "merged", but with the contents serialized. */ | |
2177 | ||
b34976b6 | 2178 | bfd_boolean |
3c3bdf30 NC |
2179 | mmix_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) |
2180 | bfd *abfd; | |
2181 | struct bfd_link_info *info ATTRIBUTE_UNUSED; | |
555cd476 | 2182 | Elf_Internal_Sym *sym; |
3c3bdf30 NC |
2183 | const char **namep ATTRIBUTE_UNUSED; |
2184 | flagword *flagsp ATTRIBUTE_UNUSED; | |
2185 | asection **secp; | |
2186 | bfd_vma *valp ATTRIBUTE_UNUSED; | |
2187 | { | |
2188 | if (sym->st_shndx == SHN_REGISTER) | |
2189 | *secp = bfd_make_section_old_way (abfd, MMIX_REG_SECTION_NAME); | |
2190 | else if ((*namep)[0] == '_' && (*namep)[1] == '_' && (*namep)[2] == '.' | |
2191 | && strncmp (*namep, MMIX_LOC_SECTION_START_SYMBOL_PREFIX, | |
2192 | strlen (MMIX_LOC_SECTION_START_SYMBOL_PREFIX)) == 0) | |
2193 | { | |
2194 | /* See if we have another one. */ | |
4ab82700 AM |
2195 | struct bfd_link_hash_entry *h = bfd_link_hash_lookup (info->hash, |
2196 | *namep, | |
b34976b6 AM |
2197 | FALSE, |
2198 | FALSE, | |
2199 | FALSE); | |
3c3bdf30 | 2200 | |
4ab82700 | 2201 | if (h != NULL && h->type != bfd_link_hash_undefined) |
3c3bdf30 NC |
2202 | { |
2203 | /* How do we get the asymbol (or really: the filename) from h? | |
4ab82700 | 2204 | h->u.def.section->owner is NULL. */ |
3c3bdf30 NC |
2205 | ((*_bfd_error_handler) |
2206 | (_("%s: Error: multiple definition of `%s'; start of %s is set in a earlier linked file\n"), | |
2207 | bfd_get_filename (abfd), *namep, | |
2208 | *namep + strlen (MMIX_LOC_SECTION_START_SYMBOL_PREFIX))); | |
2209 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2210 | return FALSE; |
3c3bdf30 NC |
2211 | } |
2212 | } | |
2213 | ||
b34976b6 | 2214 | return TRUE; |
3c3bdf30 NC |
2215 | } |
2216 | ||
2217 | /* We consider symbols matching "L.*:[0-9]+" to be local symbols. */ | |
2218 | ||
b34976b6 | 2219 | bfd_boolean |
3c3bdf30 NC |
2220 | mmix_elf_is_local_label_name (abfd, name) |
2221 | bfd *abfd; | |
2222 | const char *name; | |
2223 | { | |
2224 | const char *colpos; | |
2225 | int digits; | |
2226 | ||
2227 | /* Also include the default local-label definition. */ | |
2228 | if (_bfd_elf_is_local_label_name (abfd, name)) | |
b34976b6 | 2229 | return TRUE; |
3c3bdf30 NC |
2230 | |
2231 | if (*name != 'L') | |
b34976b6 | 2232 | return FALSE; |
3c3bdf30 NC |
2233 | |
2234 | /* If there's no ":", or more than one, it's not a local symbol. */ | |
2235 | colpos = strchr (name, ':'); | |
2236 | if (colpos == NULL || strchr (colpos + 1, ':') != NULL) | |
b34976b6 | 2237 | return FALSE; |
3c3bdf30 NC |
2238 | |
2239 | /* Check that there are remaining characters and that they are digits. */ | |
2240 | if (colpos[1] == 0) | |
b34976b6 | 2241 | return FALSE; |
3c3bdf30 NC |
2242 | |
2243 | digits = strspn (colpos + 1, "0123456789"); | |
2244 | return digits != 0 && colpos[1 + digits] == 0; | |
2245 | } | |
2246 | ||
2247 | /* We get rid of the register section here. */ | |
2248 | ||
b34976b6 | 2249 | bfd_boolean |
3c3bdf30 NC |
2250 | mmix_elf_final_link (abfd, info) |
2251 | bfd *abfd; | |
2252 | struct bfd_link_info *info; | |
2253 | { | |
2254 | /* We never output a register section, though we create one for | |
2255 | temporary measures. Check that nobody entered contents into it. */ | |
2256 | asection *reg_section; | |
2257 | asection **secpp; | |
2258 | ||
2259 | reg_section = bfd_get_section_by_name (abfd, MMIX_REG_SECTION_NAME); | |
2260 | ||
2261 | if (reg_section != NULL) | |
2262 | { | |
2263 | /* FIXME: Pass error state gracefully. */ | |
2264 | if (bfd_get_section_flags (abfd, reg_section) & SEC_HAS_CONTENTS) | |
2265 | _bfd_abort (__FILE__, __LINE__, _("Register section has contents\n")); | |
2266 | ||
3c3bdf30 NC |
2267 | /* Really remove the section. */ |
2268 | for (secpp = &abfd->sections; | |
2269 | *secpp != reg_section; | |
2270 | secpp = &(*secpp)->next) | |
2271 | ; | |
9e7b37b3 | 2272 | bfd_section_list_remove (abfd, secpp); |
3c3bdf30 NC |
2273 | --abfd->section_count; |
2274 | } | |
2275 | ||
c152c796 | 2276 | if (! bfd_elf_final_link (abfd, info)) |
b34976b6 | 2277 | return FALSE; |
3c3bdf30 | 2278 | |
930b4cb2 HPN |
2279 | /* Since this section is marked SEC_LINKER_CREATED, it isn't output by |
2280 | the regular linker machinery. We do it here, like other targets with | |
2281 | special sections. */ | |
2282 | if (info->base_file != NULL) | |
2283 | { | |
2284 | asection *greg_section | |
2285 | = bfd_get_section_by_name ((bfd *) info->base_file, | |
2286 | MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME); | |
2287 | if (!bfd_set_section_contents (abfd, | |
2288 | greg_section->output_section, | |
2289 | greg_section->contents, | |
2290 | (file_ptr) greg_section->output_offset, | |
eea6121a | 2291 | greg_section->size)) |
b34976b6 | 2292 | return FALSE; |
930b4cb2 | 2293 | } |
b34976b6 | 2294 | return TRUE; |
930b4cb2 HPN |
2295 | } |
2296 | ||
f60ebe14 | 2297 | /* We need to include the maximum size of PUSHJ-stubs in the initial |
eea6121a | 2298 | section size. This is expected to shrink during linker relaxation. */ |
f60ebe14 HPN |
2299 | |
2300 | static void | |
2301 | mmix_set_relaxable_size (abfd, sec, ptr) | |
2302 | bfd *abfd ATTRIBUTE_UNUSED; | |
2303 | asection *sec; | |
2304 | void *ptr; | |
2305 | { | |
2306 | struct bfd_link_info *info = ptr; | |
2307 | ||
2308 | /* Make sure we only do this for section where we know we want this, | |
2309 | otherwise we might end up resetting the size of COMMONs. */ | |
2310 | if (mmix_elf_section_data (sec)->pjs.n_pushj_relocs == 0) | |
2311 | return; | |
2312 | ||
eea6121a AM |
2313 | sec->size += (mmix_elf_section_data (sec)->pjs.n_pushj_relocs |
2314 | * MAX_PUSHJ_STUB_SIZE); | |
f60ebe14 HPN |
2315 | |
2316 | /* For use in relocatable link, we start with a max stubs size. See | |
2317 | mmix_elf_relax_section. */ | |
2318 | if (info->relocatable && sec->output_section) | |
2319 | mmix_elf_section_data (sec->output_section)->pjs.stubs_size_sum | |
2320 | += (mmix_elf_section_data (sec)->pjs.n_pushj_relocs | |
2321 | * MAX_PUSHJ_STUB_SIZE); | |
2322 | } | |
2323 | ||
930b4cb2 HPN |
2324 | /* Initialize stuff for the linker-generated GREGs to match |
2325 | R_MMIX_BASE_PLUS_OFFSET relocs seen by the linker. */ | |
2326 | ||
b34976b6 | 2327 | bfd_boolean |
f60ebe14 | 2328 | _bfd_mmix_before_linker_allocation (abfd, info) |
930b4cb2 HPN |
2329 | bfd *abfd ATTRIBUTE_UNUSED; |
2330 | struct bfd_link_info *info; | |
2331 | { | |
2332 | asection *bpo_gregs_section; | |
2333 | bfd *bpo_greg_owner; | |
2334 | struct bpo_greg_section_info *gregdata; | |
2335 | size_t n_gregs; | |
2336 | bfd_vma gregs_size; | |
2337 | size_t i; | |
2338 | size_t *bpo_reloc_indexes; | |
f60ebe14 HPN |
2339 | bfd *ibfd; |
2340 | ||
2341 | /* Set the initial size of sections. */ | |
2342 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
2343 | bfd_map_over_sections (ibfd, mmix_set_relaxable_size, info); | |
930b4cb2 HPN |
2344 | |
2345 | /* The bpo_greg_owner bfd is supposed to have been set by | |
2346 | mmix_elf_check_relocs when the first R_MMIX_BASE_PLUS_OFFSET is seen. | |
2347 | If there is no such object, there was no R_MMIX_BASE_PLUS_OFFSET. */ | |
2348 | bpo_greg_owner = (bfd *) info->base_file; | |
2349 | if (bpo_greg_owner == NULL) | |
b34976b6 | 2350 | return TRUE; |
930b4cb2 HPN |
2351 | |
2352 | bpo_gregs_section | |
2353 | = bfd_get_section_by_name (bpo_greg_owner, | |
2354 | MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME); | |
2355 | ||
930b4cb2 | 2356 | if (bpo_gregs_section == NULL) |
b34976b6 | 2357 | return TRUE; |
930b4cb2 HPN |
2358 | |
2359 | /* We use the target-data handle in the ELF section data. */ | |
f0abc2a1 | 2360 | gregdata = mmix_elf_section_data (bpo_gregs_section)->bpo.greg; |
930b4cb2 | 2361 | if (gregdata == NULL) |
b34976b6 | 2362 | return FALSE; |
930b4cb2 HPN |
2363 | |
2364 | n_gregs = gregdata->n_bpo_relocs; | |
2365 | gregdata->n_allocated_bpo_gregs = n_gregs; | |
2366 | ||
2367 | /* When this reaches zero during relaxation, all entries have been | |
2368 | filled in and the size of the linker gregs can be calculated. */ | |
2369 | gregdata->n_remaining_bpo_relocs_this_relaxation_round = n_gregs; | |
2370 | ||
2371 | /* Set the zeroth-order estimate for the GREGs size. */ | |
2372 | gregs_size = n_gregs * 8; | |
2373 | ||
2374 | if (!bfd_set_section_size (bpo_greg_owner, bpo_gregs_section, gregs_size)) | |
b34976b6 | 2375 | return FALSE; |
930b4cb2 HPN |
2376 | |
2377 | /* Allocate and set up the GREG arrays. They're filled in at relaxation | |
2378 | time. Note that we must use the max number ever noted for the array, | |
2379 | since the index numbers were created before GC. */ | |
2380 | gregdata->reloc_request | |
2381 | = bfd_zalloc (bpo_greg_owner, | |
2382 | sizeof (struct bpo_reloc_request) | |
2383 | * gregdata->n_max_bpo_relocs); | |
2384 | ||
2385 | gregdata->bpo_reloc_indexes | |
2386 | = bpo_reloc_indexes | |
2387 | = bfd_alloc (bpo_greg_owner, | |
2388 | gregdata->n_max_bpo_relocs | |
2389 | * sizeof (size_t)); | |
2390 | if (bpo_reloc_indexes == NULL) | |
b34976b6 | 2391 | return FALSE; |
930b4cb2 HPN |
2392 | |
2393 | /* The default order is an identity mapping. */ | |
2394 | for (i = 0; i < gregdata->n_max_bpo_relocs; i++) | |
2395 | { | |
2396 | bpo_reloc_indexes[i] = i; | |
2397 | gregdata->reloc_request[i].bpo_reloc_no = i; | |
2398 | } | |
2399 | ||
b34976b6 | 2400 | return TRUE; |
3c3bdf30 | 2401 | } |
e06fcc86 | 2402 | \f |
930b4cb2 HPN |
2403 | /* Fill in contents in the linker allocated gregs. Everything is |
2404 | calculated at this point; we just move the contents into place here. */ | |
2405 | ||
b34976b6 | 2406 | bfd_boolean |
f60ebe14 | 2407 | _bfd_mmix_after_linker_allocation (abfd, link_info) |
930b4cb2 HPN |
2408 | bfd *abfd ATTRIBUTE_UNUSED; |
2409 | struct bfd_link_info *link_info; | |
2410 | { | |
2411 | asection *bpo_gregs_section; | |
2412 | bfd *bpo_greg_owner; | |
2413 | struct bpo_greg_section_info *gregdata; | |
2414 | size_t n_gregs; | |
2415 | size_t i, j; | |
2416 | size_t lastreg; | |
2417 | bfd_byte *contents; | |
2418 | ||
2419 | /* The bpo_greg_owner bfd is supposed to have been set by mmix_elf_check_relocs | |
2420 | when the first R_MMIX_BASE_PLUS_OFFSET is seen. If there is no such | |
2421 | object, there was no R_MMIX_BASE_PLUS_OFFSET. */ | |
2422 | bpo_greg_owner = (bfd *) link_info->base_file; | |
2423 | if (bpo_greg_owner == NULL) | |
b34976b6 | 2424 | return TRUE; |
930b4cb2 HPN |
2425 | |
2426 | bpo_gregs_section | |
2427 | = bfd_get_section_by_name (bpo_greg_owner, | |
2428 | MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME); | |
2429 | ||
2430 | /* This can't happen without DSO handling. When DSOs are handled | |
2431 | without any R_MMIX_BASE_PLUS_OFFSET seen, there will be no such | |
2432 | section. */ | |
2433 | if (bpo_gregs_section == NULL) | |
b34976b6 | 2434 | return TRUE; |
930b4cb2 HPN |
2435 | |
2436 | /* We use the target-data handle in the ELF section data. */ | |
2437 | ||
f0abc2a1 | 2438 | gregdata = mmix_elf_section_data (bpo_gregs_section)->bpo.greg; |
930b4cb2 | 2439 | if (gregdata == NULL) |
b34976b6 | 2440 | return FALSE; |
930b4cb2 HPN |
2441 | |
2442 | n_gregs = gregdata->n_allocated_bpo_gregs; | |
2443 | ||
2444 | bpo_gregs_section->contents | |
eea6121a | 2445 | = contents = bfd_alloc (bpo_greg_owner, bpo_gregs_section->size); |
930b4cb2 | 2446 | if (contents == NULL) |
b34976b6 | 2447 | return FALSE; |
930b4cb2 | 2448 | |
7e799044 HPN |
2449 | /* Sanity check: If these numbers mismatch, some relocation has not been |
2450 | accounted for and the rest of gregdata is probably inconsistent. | |
2451 | It's a bug, but it's more helpful to identify it than segfaulting | |
2452 | below. */ | |
2453 | if (gregdata->n_remaining_bpo_relocs_this_relaxation_round | |
2454 | != gregdata->n_bpo_relocs) | |
2455 | { | |
2456 | (*_bfd_error_handler) | |
2457 | (_("Internal inconsistency: remaining %u != max %u.\n\ | |
2458 | Please report this bug."), | |
2459 | gregdata->n_remaining_bpo_relocs_this_relaxation_round, | |
2460 | gregdata->n_bpo_relocs); | |
b34976b6 | 2461 | return FALSE; |
7e799044 HPN |
2462 | } |
2463 | ||
930b4cb2 HPN |
2464 | for (lastreg = 255, i = 0, j = 0; j < n_gregs; i++) |
2465 | if (gregdata->reloc_request[i].regindex != lastreg) | |
2466 | { | |
2467 | bfd_put_64 (bpo_greg_owner, gregdata->reloc_request[i].value, | |
2468 | contents + j * 8); | |
2469 | lastreg = gregdata->reloc_request[i].regindex; | |
2470 | j++; | |
2471 | } | |
2472 | ||
b34976b6 | 2473 | return TRUE; |
930b4cb2 HPN |
2474 | } |
2475 | ||
2476 | /* Sort valid relocs to come before non-valid relocs, then on increasing | |
2477 | value. */ | |
2478 | ||
2479 | static int | |
2480 | bpo_reloc_request_sort_fn (p1, p2) | |
2481 | const PTR p1; | |
2482 | const PTR p2; | |
2483 | { | |
2484 | const struct bpo_reloc_request *r1 = (const struct bpo_reloc_request *) p1; | |
2485 | const struct bpo_reloc_request *r2 = (const struct bpo_reloc_request *) p2; | |
2486 | ||
2487 | /* Primary function is validity; non-valid relocs sorted after valid | |
2488 | ones. */ | |
2489 | if (r1->valid != r2->valid) | |
2490 | return r2->valid - r1->valid; | |
2491 | ||
4fa5c2a8 HPN |
2492 | /* Then sort on value. Don't simplify and return just the difference of |
2493 | the values: the upper bits of the 64-bit value would be truncated on | |
2494 | a host with 32-bit ints. */ | |
930b4cb2 | 2495 | if (r1->value != r2->value) |
4fa5c2a8 | 2496 | return r1->value > r2->value ? 1 : -1; |
930b4cb2 | 2497 | |
dfbbae4c HPN |
2498 | /* As a last re-sort, use the relocation number, so we get a stable |
2499 | sort. The *addresses* aren't stable since items are swapped during | |
2500 | sorting. It depends on the qsort implementation if this actually | |
2501 | happens. */ | |
2502 | return r1->bpo_reloc_no > r2->bpo_reloc_no | |
2503 | ? 1 : (r1->bpo_reloc_no < r2->bpo_reloc_no ? -1 : 0); | |
930b4cb2 HPN |
2504 | } |
2505 | ||
4fa5c2a8 HPN |
2506 | /* For debug use only. Dumps the global register allocations resulting |
2507 | from base-plus-offset relocs. */ | |
2508 | ||
2509 | void | |
2510 | mmix_dump_bpo_gregs (link_info, pf) | |
2511 | struct bfd_link_info *link_info; | |
2512 | bfd_error_handler_type pf; | |
2513 | { | |
2514 | bfd *bpo_greg_owner; | |
2515 | asection *bpo_gregs_section; | |
2516 | struct bpo_greg_section_info *gregdata; | |
2517 | unsigned int i; | |
2518 | ||
2519 | if (link_info == NULL || link_info->base_file == NULL) | |
2520 | return; | |
2521 | ||
2522 | bpo_greg_owner = (bfd *) link_info->base_file; | |
2523 | ||
2524 | bpo_gregs_section | |
2525 | = bfd_get_section_by_name (bpo_greg_owner, | |
2526 | MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME); | |
2527 | ||
2528 | if (bpo_gregs_section == NULL) | |
2529 | return; | |
2530 | ||
f0abc2a1 | 2531 | gregdata = mmix_elf_section_data (bpo_gregs_section)->bpo.greg; |
4fa5c2a8 HPN |
2532 | if (gregdata == NULL) |
2533 | return; | |
2534 | ||
2535 | if (pf == NULL) | |
2536 | pf = _bfd_error_handler; | |
2537 | ||
2538 | /* These format strings are not translated. They are for debug purposes | |
2539 | only and never displayed to an end user. Should they escape, we | |
2540 | surely want them in original. */ | |
2541 | (*pf) (" n_bpo_relocs: %u\n n_max_bpo_relocs: %u\n n_remain...round: %u\n\ | |
2542 | n_allocated_bpo_gregs: %u\n", gregdata->n_bpo_relocs, | |
2543 | gregdata->n_max_bpo_relocs, | |
2544 | gregdata->n_remaining_bpo_relocs_this_relaxation_round, | |
2545 | gregdata->n_allocated_bpo_gregs); | |
2546 | ||
2547 | if (gregdata->reloc_request) | |
2548 | for (i = 0; i < gregdata->n_max_bpo_relocs; i++) | |
2549 | (*pf) ("%4u (%4u)/%4u#%u: 0x%08lx%08lx r: %3u o: %3u\n", | |
2550 | i, | |
cf3d882d AM |
2551 | (gregdata->bpo_reloc_indexes != NULL |
2552 | ? gregdata->bpo_reloc_indexes[i] : (size_t) -1), | |
4fa5c2a8 HPN |
2553 | gregdata->reloc_request[i].bpo_reloc_no, |
2554 | gregdata->reloc_request[i].valid, | |
2555 | ||
2556 | (unsigned long) (gregdata->reloc_request[i].value >> 32), | |
2557 | (unsigned long) gregdata->reloc_request[i].value, | |
2558 | gregdata->reloc_request[i].regindex, | |
2559 | gregdata->reloc_request[i].offset); | |
2560 | } | |
2561 | ||
930b4cb2 HPN |
2562 | /* This links all R_MMIX_BASE_PLUS_OFFSET relocs into a special array, and |
2563 | when the last such reloc is done, an index-array is sorted according to | |
2564 | the values and iterated over to produce register numbers (indexed by 0 | |
2565 | from the first allocated register number) and offsets for use in real | |
2566 | relocation. | |
2567 | ||
f60ebe14 HPN |
2568 | PUSHJ stub accounting is also done here. |
2569 | ||
930b4cb2 HPN |
2570 | Symbol- and reloc-reading infrastructure copied from elf-m10200.c. */ |
2571 | ||
b34976b6 | 2572 | static bfd_boolean |
930b4cb2 HPN |
2573 | mmix_elf_relax_section (abfd, sec, link_info, again) |
2574 | bfd *abfd; | |
2575 | asection *sec; | |
2576 | struct bfd_link_info *link_info; | |
b34976b6 | 2577 | bfd_boolean *again; |
930b4cb2 | 2578 | { |
930b4cb2 | 2579 | Elf_Internal_Shdr *symtab_hdr; |
930b4cb2 | 2580 | Elf_Internal_Rela *internal_relocs; |
930b4cb2 HPN |
2581 | Elf_Internal_Rela *irel, *irelend; |
2582 | asection *bpo_gregs_section = NULL; | |
2583 | struct bpo_greg_section_info *gregdata; | |
2584 | struct bpo_reloc_section_info *bpodata | |
f0abc2a1 | 2585 | = mmix_elf_section_data (sec)->bpo.reloc; |
f60ebe14 HPN |
2586 | /* The initialization is to quiet compiler warnings. The value is to |
2587 | spot a missing actual initialization. */ | |
2588 | size_t bpono = (size_t) -1; | |
2589 | size_t pjsno = 0; | |
930b4cb2 | 2590 | bfd *bpo_greg_owner; |
6cdc0ccc | 2591 | Elf_Internal_Sym *isymbuf = NULL; |
eea6121a AM |
2592 | bfd_size_type size = (sec->size |
2593 | - (mmix_elf_section_data (sec)->pjs.n_pushj_relocs | |
2594 | * MAX_PUSHJ_STUB_SIZE)); | |
f60ebe14 HPN |
2595 | |
2596 | mmix_elf_section_data (sec)->pjs.stubs_size_sum = 0; | |
930b4cb2 HPN |
2597 | |
2598 | /* Assume nothing changes. */ | |
b34976b6 | 2599 | *again = FALSE; |
930b4cb2 | 2600 | |
f60ebe14 HPN |
2601 | /* We don't have to do anything if this section does not have relocs, or |
2602 | if this is not a code section. */ | |
2603 | if ((sec->flags & SEC_RELOC) == 0 | |
930b4cb2 HPN |
2604 | || sec->reloc_count == 0 |
2605 | || (sec->flags & SEC_CODE) == 0 | |
2606 | || (sec->flags & SEC_LINKER_CREATED) != 0 | |
f60ebe14 HPN |
2607 | /* If no R_MMIX_BASE_PLUS_OFFSET relocs and no PUSHJ-stub relocs, |
2608 | then nothing to do. */ | |
2609 | || (bpodata == NULL | |
2610 | && mmix_elf_section_data (sec)->pjs.n_pushj_relocs == 0)) | |
b34976b6 | 2611 | return TRUE; |
930b4cb2 HPN |
2612 | |
2613 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
930b4cb2 HPN |
2614 | |
2615 | bpo_greg_owner = (bfd *) link_info->base_file; | |
930b4cb2 | 2616 | |
f60ebe14 HPN |
2617 | if (bpodata != NULL) |
2618 | { | |
2619 | bpo_gregs_section = bpodata->bpo_greg_section; | |
2620 | gregdata = mmix_elf_section_data (bpo_gregs_section)->bpo.greg; | |
2621 | bpono = bpodata->first_base_plus_offset_reloc; | |
2622 | } | |
2623 | else | |
2624 | gregdata = NULL; | |
930b4cb2 HPN |
2625 | |
2626 | /* Get a copy of the native relocations. */ | |
2627 | internal_relocs | |
45d6a902 AM |
2628 | = _bfd_elf_link_read_relocs (abfd, sec, (PTR) NULL, |
2629 | (Elf_Internal_Rela *) NULL, | |
2630 | link_info->keep_memory); | |
930b4cb2 HPN |
2631 | if (internal_relocs == NULL) |
2632 | goto error_return; | |
930b4cb2 HPN |
2633 | |
2634 | /* Walk through them looking for relaxing opportunities. */ | |
2635 | irelend = internal_relocs + sec->reloc_count; | |
2636 | for (irel = internal_relocs; irel < irelend; irel++) | |
2637 | { | |
2638 | bfd_vma symval; | |
f60ebe14 | 2639 | struct elf_link_hash_entry *h = NULL; |
930b4cb2 | 2640 | |
f60ebe14 HPN |
2641 | /* We only process two relocs. */ |
2642 | if (ELF64_R_TYPE (irel->r_info) != (int) R_MMIX_BASE_PLUS_OFFSET | |
2643 | && ELF64_R_TYPE (irel->r_info) != (int) R_MMIX_PUSHJ_STUBBABLE) | |
930b4cb2 HPN |
2644 | continue; |
2645 | ||
f60ebe14 HPN |
2646 | /* We process relocs in a distinctly different way when this is a |
2647 | relocatable link (for one, we don't look at symbols), so we avoid | |
2648 | mixing its code with that for the "normal" relaxation. */ | |
2649 | if (link_info->relocatable) | |
2650 | { | |
2651 | /* The only transformation in a relocatable link is to generate | |
2652 | a full stub at the location of the stub calculated for the | |
2653 | input section, if the relocated stub location, the end of the | |
2654 | output section plus earlier stubs, cannot be reached. Thus | |
2655 | relocatable linking can only lead to worse code, but it still | |
2656 | works. */ | |
2657 | if (ELF64_R_TYPE (irel->r_info) == R_MMIX_PUSHJ_STUBBABLE) | |
2658 | { | |
2659 | /* If we can reach the end of the output-section and beyond | |
2660 | any current stubs, then we don't need a stub for this | |
2661 | reloc. The relaxed order of output stub allocation may | |
2662 | not exactly match the straightforward order, so we always | |
2663 | assume presence of output stubs, which will allow | |
2664 | relaxation only on relocations indifferent to the | |
2665 | presence of output stub allocations for other relocations | |
2666 | and thus the order of output stub allocation. */ | |
2667 | if (bfd_check_overflow (complain_overflow_signed, | |
2668 | 19, | |
2669 | 0, | |
2670 | bfd_arch_bits_per_address (abfd), | |
2671 | /* Output-stub location. */ | |
eea6121a | 2672 | sec->output_section->size |
f60ebe14 HPN |
2673 | + (mmix_elf_section_data (sec |
2674 | ->output_section) | |
2675 | ->pjs.stubs_size_sum) | |
2676 | /* Location of this PUSHJ reloc. */ | |
2677 | - (sec->output_offset + irel->r_offset) | |
2678 | /* Don't count *this* stub twice. */ | |
2679 | - (mmix_elf_section_data (sec) | |
2680 | ->pjs.stub_size[pjsno] | |
2681 | + MAX_PUSHJ_STUB_SIZE)) | |
2682 | == bfd_reloc_ok) | |
2683 | mmix_elf_section_data (sec)->pjs.stub_size[pjsno] = 0; | |
2684 | ||
2685 | mmix_elf_section_data (sec)->pjs.stubs_size_sum | |
2686 | += mmix_elf_section_data (sec)->pjs.stub_size[pjsno]; | |
2687 | ||
2688 | pjsno++; | |
2689 | } | |
2690 | ||
2691 | continue; | |
2692 | } | |
2693 | ||
930b4cb2 HPN |
2694 | /* Get the value of the symbol referred to by the reloc. */ |
2695 | if (ELF64_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
2696 | { | |
2697 | /* A local symbol. */ | |
6cdc0ccc | 2698 | Elf_Internal_Sym *isym; |
930b4cb2 HPN |
2699 | asection *sym_sec; |
2700 | ||
6cdc0ccc AM |
2701 | /* Read this BFD's local symbols if we haven't already. */ |
2702 | if (isymbuf == NULL) | |
2703 | { | |
2704 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
2705 | if (isymbuf == NULL) | |
2706 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
2707 | symtab_hdr->sh_info, 0, | |
2708 | NULL, NULL, NULL); | |
2709 | if (isymbuf == 0) | |
2710 | goto error_return; | |
2711 | } | |
930b4cb2 | 2712 | |
6cdc0ccc AM |
2713 | isym = isymbuf + ELF64_R_SYM (irel->r_info); |
2714 | if (isym->st_shndx == SHN_UNDEF) | |
930b4cb2 | 2715 | sym_sec = bfd_und_section_ptr; |
6cdc0ccc | 2716 | else if (isym->st_shndx == SHN_ABS) |
930b4cb2 | 2717 | sym_sec = bfd_abs_section_ptr; |
6cdc0ccc | 2718 | else if (isym->st_shndx == SHN_COMMON) |
930b4cb2 HPN |
2719 | sym_sec = bfd_com_section_ptr; |
2720 | else | |
6cdc0ccc AM |
2721 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
2722 | symval = (isym->st_value | |
930b4cb2 HPN |
2723 | + sym_sec->output_section->vma |
2724 | + sym_sec->output_offset); | |
2725 | } | |
2726 | else | |
2727 | { | |
2728 | unsigned long indx; | |
930b4cb2 HPN |
2729 | |
2730 | /* An external symbol. */ | |
2731 | indx = ELF64_R_SYM (irel->r_info) - symtab_hdr->sh_info; | |
2732 | h = elf_sym_hashes (abfd)[indx]; | |
2733 | BFD_ASSERT (h != NULL); | |
2734 | if (h->root.type != bfd_link_hash_defined | |
2735 | && h->root.type != bfd_link_hash_defweak) | |
2736 | { | |
f60ebe14 HPN |
2737 | /* This appears to be a reference to an undefined symbol. Just |
2738 | ignore it--it will be caught by the regular reloc processing. | |
2739 | We need to keep BPO reloc accounting consistent, though | |
2740 | else we'll abort instead of emitting an error message. */ | |
2741 | if (ELF64_R_TYPE (irel->r_info) == R_MMIX_BASE_PLUS_OFFSET | |
2742 | && gregdata != NULL) | |
2743 | { | |
2744 | gregdata->n_remaining_bpo_relocs_this_relaxation_round--; | |
2745 | bpono++; | |
2746 | } | |
930b4cb2 HPN |
2747 | continue; |
2748 | } | |
2749 | ||
2750 | symval = (h->root.u.def.value | |
2751 | + h->root.u.def.section->output_section->vma | |
2752 | + h->root.u.def.section->output_offset); | |
2753 | } | |
2754 | ||
f60ebe14 HPN |
2755 | if (ELF64_R_TYPE (irel->r_info) == (int) R_MMIX_PUSHJ_STUBBABLE) |
2756 | { | |
2757 | bfd_vma value = symval + irel->r_addend; | |
2758 | bfd_vma dot | |
2759 | = (sec->output_section->vma | |
2760 | + sec->output_offset | |
2761 | + irel->r_offset); | |
2762 | bfd_vma stubaddr | |
2763 | = (sec->output_section->vma | |
2764 | + sec->output_offset | |
eea6121a | 2765 | + size |
f60ebe14 HPN |
2766 | + mmix_elf_section_data (sec)->pjs.stubs_size_sum); |
2767 | ||
2768 | if ((value & 3) == 0 | |
2769 | && bfd_check_overflow (complain_overflow_signed, | |
2770 | 19, | |
2771 | 0, | |
2772 | bfd_arch_bits_per_address (abfd), | |
2773 | value - dot | |
2774 | - (value > dot | |
2775 | ? mmix_elf_section_data (sec) | |
2776 | ->pjs.stub_size[pjsno] | |
2777 | : 0)) | |
2778 | == bfd_reloc_ok) | |
2779 | /* If the reloc fits, no stub is needed. */ | |
2780 | mmix_elf_section_data (sec)->pjs.stub_size[pjsno] = 0; | |
2781 | else | |
2782 | /* Maybe we can get away with just a JMP insn? */ | |
2783 | if ((value & 3) == 0 | |
2784 | && bfd_check_overflow (complain_overflow_signed, | |
2785 | 27, | |
2786 | 0, | |
2787 | bfd_arch_bits_per_address (abfd), | |
2788 | value - stubaddr | |
2789 | - (value > dot | |
2790 | ? mmix_elf_section_data (sec) | |
2791 | ->pjs.stub_size[pjsno] - 4 | |
2792 | : 0)) | |
2793 | == bfd_reloc_ok) | |
2794 | /* Yep, account for a stub consisting of a single JMP insn. */ | |
2795 | mmix_elf_section_data (sec)->pjs.stub_size[pjsno] = 4; | |
2796 | else | |
2797 | /* Nope, go for the full insn stub. It doesn't seem useful to | |
2798 | emit the intermediate sizes; those will only be useful for | |
2799 | a >64M program assuming contiguous code. */ | |
2800 | mmix_elf_section_data (sec)->pjs.stub_size[pjsno] | |
2801 | = MAX_PUSHJ_STUB_SIZE; | |
2802 | ||
2803 | mmix_elf_section_data (sec)->pjs.stubs_size_sum | |
2804 | += mmix_elf_section_data (sec)->pjs.stub_size[pjsno]; | |
2805 | pjsno++; | |
2806 | continue; | |
2807 | } | |
2808 | ||
2809 | /* We're looking at a R_MMIX_BASE_PLUS_OFFSET reloc. */ | |
2810 | ||
930b4cb2 HPN |
2811 | gregdata->reloc_request[gregdata->bpo_reloc_indexes[bpono]].value |
2812 | = symval + irel->r_addend; | |
b34976b6 | 2813 | gregdata->reloc_request[gregdata->bpo_reloc_indexes[bpono++]].valid = TRUE; |
930b4cb2 HPN |
2814 | gregdata->n_remaining_bpo_relocs_this_relaxation_round--; |
2815 | } | |
2816 | ||
2817 | /* Check if that was the last BPO-reloc. If so, sort the values and | |
2818 | calculate how many registers we need to cover them. Set the size of | |
2819 | the linker gregs, and if the number of registers changed, indicate | |
2820 | that we need to relax some more because we have more work to do. */ | |
f60ebe14 HPN |
2821 | if (gregdata != NULL |
2822 | && gregdata->n_remaining_bpo_relocs_this_relaxation_round == 0) | |
930b4cb2 HPN |
2823 | { |
2824 | size_t i; | |
2825 | bfd_vma prev_base; | |
2826 | size_t regindex; | |
2827 | ||
2828 | /* First, reset the remaining relocs for the next round. */ | |
2829 | gregdata->n_remaining_bpo_relocs_this_relaxation_round | |
2830 | = gregdata->n_bpo_relocs; | |
2831 | ||
2832 | qsort ((PTR) gregdata->reloc_request, | |
2833 | gregdata->n_max_bpo_relocs, | |
2834 | sizeof (struct bpo_reloc_request), | |
2835 | bpo_reloc_request_sort_fn); | |
2836 | ||
2837 | /* Recalculate indexes. When we find a change (however unlikely | |
2838 | after the initial iteration), we know we need to relax again, | |
2839 | since items in the GREG-array are sorted by increasing value and | |
2840 | stored in the relaxation phase. */ | |
2841 | for (i = 0; i < gregdata->n_max_bpo_relocs; i++) | |
2842 | if (gregdata->bpo_reloc_indexes[gregdata->reloc_request[i].bpo_reloc_no] | |
2843 | != i) | |
2844 | { | |
2845 | gregdata->bpo_reloc_indexes[gregdata->reloc_request[i].bpo_reloc_no] | |
2846 | = i; | |
b34976b6 | 2847 | *again = TRUE; |
930b4cb2 HPN |
2848 | } |
2849 | ||
2850 | /* Allocate register numbers (indexing from 0). Stop at the first | |
2851 | non-valid reloc. */ | |
2852 | for (i = 0, regindex = 0, prev_base = gregdata->reloc_request[0].value; | |
2853 | i < gregdata->n_bpo_relocs; | |
2854 | i++) | |
2855 | { | |
2856 | if (gregdata->reloc_request[i].value > prev_base + 255) | |
2857 | { | |
2858 | regindex++; | |
2859 | prev_base = gregdata->reloc_request[i].value; | |
2860 | } | |
2861 | gregdata->reloc_request[i].regindex = regindex; | |
2862 | gregdata->reloc_request[i].offset | |
2863 | = gregdata->reloc_request[i].value - prev_base; | |
2864 | } | |
2865 | ||
2866 | /* If it's not the same as the last time, we need to relax again, | |
2867 | because the size of the section has changed. I'm not sure we | |
2868 | actually need to do any adjustments since the shrinking happens | |
2869 | at the start of this section, but better safe than sorry. */ | |
2870 | if (gregdata->n_allocated_bpo_gregs != regindex + 1) | |
2871 | { | |
2872 | gregdata->n_allocated_bpo_gregs = regindex + 1; | |
b34976b6 | 2873 | *again = TRUE; |
930b4cb2 HPN |
2874 | } |
2875 | ||
eea6121a | 2876 | bpo_gregs_section->size = (regindex + 1) * 8; |
930b4cb2 HPN |
2877 | } |
2878 | ||
6cdc0ccc | 2879 | if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents) |
930b4cb2 HPN |
2880 | { |
2881 | if (! link_info->keep_memory) | |
6cdc0ccc AM |
2882 | free (isymbuf); |
2883 | else | |
930b4cb2 | 2884 | { |
6cdc0ccc AM |
2885 | /* Cache the symbols for elf_link_input_bfd. */ |
2886 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
930b4cb2 HPN |
2887 | } |
2888 | } | |
2889 | ||
6cdc0ccc AM |
2890 | if (internal_relocs != NULL |
2891 | && elf_section_data (sec)->relocs != internal_relocs) | |
2892 | free (internal_relocs); | |
2893 | ||
eea6121a | 2894 | if (sec->size < size + mmix_elf_section_data (sec)->pjs.stubs_size_sum) |
f60ebe14 HPN |
2895 | abort (); |
2896 | ||
eea6121a | 2897 | if (sec->size > size + mmix_elf_section_data (sec)->pjs.stubs_size_sum) |
f60ebe14 | 2898 | { |
eea6121a | 2899 | sec->size = size + mmix_elf_section_data (sec)->pjs.stubs_size_sum; |
f60ebe14 HPN |
2900 | *again = TRUE; |
2901 | } | |
2902 | ||
b34976b6 | 2903 | return TRUE; |
930b4cb2 HPN |
2904 | |
2905 | error_return: | |
6cdc0ccc AM |
2906 | if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents) |
2907 | free (isymbuf); | |
2908 | if (internal_relocs != NULL | |
2909 | && elf_section_data (sec)->relocs != internal_relocs) | |
2910 | free (internal_relocs); | |
b34976b6 | 2911 | return FALSE; |
930b4cb2 | 2912 | } |
f60ebe14 | 2913 | |
eea6121a | 2914 | /* Because we set size to include the max size of pushj stubs, |
f60ebe14 | 2915 | i.e. larger than the actual section input size (see |
eea6121a | 2916 | mmix_set_relaxablesize), we have to take care of that when reading |
f60ebe14 HPN |
2917 | the section. */ |
2918 | ||
2919 | static bfd_boolean | |
2920 | mmix_elf_get_section_contents (abfd, section, location, offset, count) | |
2921 | bfd *abfd; | |
2922 | sec_ptr section; | |
2923 | void *location; | |
2924 | file_ptr offset; | |
2925 | bfd_size_type count; | |
2926 | { | |
eea6121a AM |
2927 | bfd_size_type size = (section->size |
2928 | - (mmix_elf_section_data (section)->pjs.n_pushj_relocs | |
2929 | * MAX_PUSHJ_STUB_SIZE)); | |
f60ebe14 | 2930 | |
eea6121a | 2931 | if (offset + count > section->size) |
f60ebe14 HPN |
2932 | { |
2933 | abort(); | |
2934 | bfd_set_error (bfd_error_invalid_operation); | |
2935 | return FALSE; | |
2936 | } | |
2937 | ||
eea6121a AM |
2938 | /* Check bounds against the faked size. */ |
2939 | if (offset + count > size) | |
f60ebe14 HPN |
2940 | { |
2941 | /* Clear the part in the faked area. */ | |
eea6121a | 2942 | memset (location + size - offset, 0, count - (size - offset)); |
f60ebe14 HPN |
2943 | |
2944 | /* If there's no initial part within the "real" contents, we're | |
2945 | done. */ | |
eea6121a | 2946 | if ((bfd_size_type) offset >= size) |
f60ebe14 HPN |
2947 | return TRUE; |
2948 | ||
2949 | /* Else adjust the count and fall through to call the generic | |
2950 | function. */ | |
eea6121a | 2951 | count = size - offset; |
f60ebe14 HPN |
2952 | } |
2953 | ||
2954 | return | |
2955 | _bfd_generic_get_section_contents (abfd, section, location, offset, | |
2956 | count); | |
2957 | } | |
2958 | ||
930b4cb2 | 2959 | \f |
3c3bdf30 NC |
2960 | #define ELF_ARCH bfd_arch_mmix |
2961 | #define ELF_MACHINE_CODE EM_MMIX | |
2962 | ||
2963 | /* According to mmix-doc page 36 (paragraph 45), this should be (1LL << 48LL). | |
2964 | However, that's too much for something somewhere in the linker part of | |
2965 | BFD; perhaps the start-address has to be a non-zero multiple of this | |
2966 | number, or larger than this number. The symptom is that the linker | |
2967 | complains: "warning: allocated section `.text' not in segment". We | |
2968 | settle for 64k; the page-size used in examples is 8k. | |
2969 | #define ELF_MAXPAGESIZE 0x10000 | |
2970 | ||
2971 | Unfortunately, this causes excessive padding in the supposedly small | |
2972 | for-education programs that are the expected usage (where people would | |
2973 | inspect output). We stick to 256 bytes just to have *some* default | |
2974 | alignment. */ | |
2975 | #define ELF_MAXPAGESIZE 0x100 | |
2976 | ||
2977 | #define TARGET_BIG_SYM bfd_elf64_mmix_vec | |
2978 | #define TARGET_BIG_NAME "elf64-mmix" | |
2979 | ||
2980 | #define elf_info_to_howto_rel NULL | |
2981 | #define elf_info_to_howto mmix_info_to_howto_rela | |
2982 | #define elf_backend_relocate_section mmix_elf_relocate_section | |
2983 | #define elf_backend_gc_mark_hook mmix_elf_gc_mark_hook | |
930b4cb2 HPN |
2984 | #define elf_backend_gc_sweep_hook mmix_elf_gc_sweep_hook |
2985 | ||
3c3bdf30 NC |
2986 | #define elf_backend_link_output_symbol_hook \ |
2987 | mmix_elf_link_output_symbol_hook | |
2988 | #define elf_backend_add_symbol_hook mmix_elf_add_symbol_hook | |
2989 | ||
2990 | #define elf_backend_check_relocs mmix_elf_check_relocs | |
2991 | #define elf_backend_symbol_processing mmix_elf_symbol_processing | |
2992 | ||
2993 | #define bfd_elf64_bfd_is_local_label_name \ | |
2994 | mmix_elf_is_local_label_name | |
2995 | ||
2996 | #define elf_backend_may_use_rel_p 0 | |
2997 | #define elf_backend_may_use_rela_p 1 | |
2998 | #define elf_backend_default_use_rela_p 1 | |
2999 | ||
3000 | #define elf_backend_can_gc_sections 1 | |
3001 | #define elf_backend_section_from_bfd_section \ | |
3002 | mmix_elf_section_from_bfd_section | |
3003 | ||
f0abc2a1 | 3004 | #define bfd_elf64_new_section_hook mmix_elf_new_section_hook |
3c3bdf30 | 3005 | #define bfd_elf64_bfd_final_link mmix_elf_final_link |
930b4cb2 | 3006 | #define bfd_elf64_bfd_relax_section mmix_elf_relax_section |
f60ebe14 | 3007 | #define bfd_elf64_get_section_contents mmix_elf_get_section_contents |
3c3bdf30 NC |
3008 | |
3009 | #include "elf64-target.h" |