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PR ld/4023
[deliverable/binutils-gdb.git] / bfd / elf64-mmix.c
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3c3bdf30 1/* MMIX-specific support for 64-bit ELF.
f592407e
AM		 2 Copyright 2001, 2002, 2003, 2004, 2005, 2006
3 Free Software Foundation, Inc.
3c3bdf30
NC		 4 Contributed by Hans-Peter Nilsson <hp@bitrange.com>
5
6This file is part of BFD, the Binary File Descriptor library.
7
8This program is free software; you can redistribute it and/or modify
9it under the terms of the GNU General Public License as published by
10the Free Software Foundation; either version 2 of the License, or
11(at your option) any later version.
12
13This program is distributed in the hope that it will be useful,
14but WITHOUT ANY WARRANTY; without even the implied warranty of
15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16GNU General Public License for more details.
17
18You should have received a copy of the GNU General Public License
19along with this program; if not, write to the Free Software
3e110533 20Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
3c3bdf30
NC		 21
22/* No specific ABI or "processor-specific supplement" defined. */
23
24/* TODO:
f60ebe14
HPN		 25 - "Traditional" linker relaxation (shrinking whole sections).
26 - Merge reloc stubs jumping to same location.
27 - GETA stub relaxation (call a stub for out of range new
28 R_MMIX_GETA_STUBBABLE). */
3c3bdf30
NC		 29
30#include "bfd.h"
31#include "sysdep.h"
32#include "libbfd.h"
33#include "elf-bfd.h"
34#include "elf/mmix.h"
35#include "opcode/mmix.h"
36
37#define MINUS_ONE (((bfd_vma) 0) - 1)
38
f60ebe14
HPN		 39#define MAX_PUSHJ_STUB_SIZE (5 * 4)
40
3c3bdf30
NC		 41/* Put these everywhere in new code. */
42#define FATAL_DEBUG \
43 _bfd_abort (__FILE__, __LINE__, \
44 "Internal: Non-debugged code (test-case missing)")
45
46#define BAD_CASE(x) \
47 _bfd_abort (__FILE__, __LINE__, \
48 "bad case for " #x)
49
f0abc2a1
AM		 50struct _mmix_elf_section_data
51{
52 struct bfd_elf_section_data elf;
53 union
54 {
55 struct bpo_reloc_section_info *reloc;
56 struct bpo_greg_section_info *greg;
57 } bpo;
f60ebe14
HPN		 58
59 struct pushj_stub_info
60 {
61 /* Maximum number of stubs needed for this section. */
62 bfd_size_type n_pushj_relocs;
63
64 /* Size of stubs after a mmix_elf_relax_section round. */
65 bfd_size_type stubs_size_sum;
66
67 /* Per-reloc stubs_size_sum information. The stubs_size_sum member is the sum
68 of these. Allocated in mmix_elf_check_common_relocs. */
69 bfd_size_type *stub_size;
70
71 /* Offset of next stub during relocation. Somewhat redundant with the
72 above: error coverage is easier and we don't have to reset the
73 stubs_size_sum for relocation. */
74 bfd_size_type stub_offset;
75 } pjs;
f0abc2a1
AM		 76};
77
78#define mmix_elf_section_data(sec) \
68bfbfcc 79 ((struct _mmix_elf_section_data *) elf_section_data (sec))
f0abc2a1 80
930b4cb2 81/* For each section containing a base-plus-offset (BPO) reloc, we attach
f0abc2a1 82 this struct as mmix_elf_section_data (section)->bpo, which is otherwise
930b4cb2
HPN		 83 NULL. */
84struct bpo_reloc_section_info
85 {
86 /* The base is 1; this is the first number in this section. */
87 size_t first_base_plus_offset_reloc;
88
89 /* Number of BPO-relocs in this section. */
90 size_t n_bpo_relocs_this_section;
91
92 /* Running index, used at relocation time. */
93 size_t bpo_index;
94
95 /* We don't have access to the bfd_link_info struct in
96 mmix_final_link_relocate. What we really want to get at is the
97 global single struct greg_relocation, so we stash it here. */
98 asection *bpo_greg_section;
99 };
100
101/* Helper struct (in global context) for the one below.
102 There's one of these created for every BPO reloc. */
103struct bpo_reloc_request
104 {
105 bfd_vma value;
106
107 /* Valid after relaxation. The base is 0; the first register number
108 must be added. The offset is in range 0..255. */
109 size_t regindex;
110 size_t offset;
111
112 /* The order number for this BPO reloc, corresponding to the order in
113 which BPO relocs were found. Used to create an index after reloc
114 requests are sorted. */
115 size_t bpo_reloc_no;
116
117 /* Set when the value is computed. Better than coding "guard values"
b34976b6 118 into the other members. Is FALSE only for BPO relocs in a GC:ed
930b4cb2 119 section. */
b34976b6 120 bfd_boolean valid;
930b4cb2
HPN		 121 };
122
f0abc2a1 123/* We attach this as mmix_elf_section_data (sec)->bpo in the linker-allocated
930b4cb2
HPN		 124 greg contents section (MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME),
125 which is linked into the register contents section
126 (MMIX_REG_CONTENTS_SECTION_NAME). This section is created by the
127 linker; using the same hook as for usual with BPO relocs does not
128 collide. */
129struct bpo_greg_section_info
130 {
131 /* After GC, this reflects the number of remaining, non-excluded
132 BPO-relocs. */
133 size_t n_bpo_relocs;
134
135 /* This is the number of allocated bpo_reloc_requests; the size of
136 sorted_indexes. Valid after the check.*relocs functions are called
137 for all incoming sections. It includes the number of BPO relocs in
138 sections that were GC:ed. */
139 size_t n_max_bpo_relocs;
140
141 /* A counter used to find out when to fold the BPO gregs, since we
142 don't have a single "after-relaxation" hook. */
143 size_t n_remaining_bpo_relocs_this_relaxation_round;
144
145 /* The number of linker-allocated GREGs resulting from BPO relocs.
f60ebe14
HPN		 146 This is an approximation after _bfd_mmix_before_linker_allocation
147 and supposedly accurate after mmix_elf_relax_section is called for
148 all incoming non-collected sections. */
930b4cb2
HPN		 149 size_t n_allocated_bpo_gregs;
150
151 /* Index into reloc_request[], sorted on increasing "value", secondary
152 by increasing index for strict sorting order. */
153 size_t *bpo_reloc_indexes;
154
155 /* An array of all relocations, with the "value" member filled in by
156 the relaxation function. */
157 struct bpo_reloc_request *reloc_request;
158 };
159
b34976b6 160static bfd_boolean mmix_elf_link_output_symbol_hook
754021d0
AM		 161 PARAMS ((struct bfd_link_info *, const char *, Elf_Internal_Sym *,
162 asection *, struct elf_link_hash_entry *));
3c3bdf30
NC		 163
164static bfd_reloc_status_type mmix_elf_reloc
165 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
166
167static reloc_howto_type *bfd_elf64_bfd_reloc_type_lookup
168 PARAMS ((bfd *, bfd_reloc_code_real_type));
169
170static void mmix_info_to_howto_rela
947216bf 171 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
3c3bdf30
NC		 172
173static int mmix_elf_sort_relocs PARAMS ((const PTR, const PTR));
174
f0abc2a1
AM		 175static bfd_boolean mmix_elf_new_section_hook
176 PARAMS ((bfd *, asection *));
177
b34976b6 178static bfd_boolean mmix_elf_check_relocs
3c3bdf30
NC		 179 PARAMS ((bfd *, struct bfd_link_info *, asection *,
180 const Elf_Internal_Rela *));
181
b34976b6 182static bfd_boolean mmix_elf_check_common_relocs
930b4cb2
HPN		 183 PARAMS ((bfd *, struct bfd_link_info *, asection *,
184 const Elf_Internal_Rela *));
185
b34976b6 186static bfd_boolean mmix_elf_relocate_section
3c3bdf30
NC		 187 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
188 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
189
3c3bdf30
NC		 190static bfd_reloc_status_type mmix_final_link_relocate
191 PARAMS ((reloc_howto_type *, asection *, bfd_byte *,
192 bfd_vma, bfd_signed_vma, bfd_vma, const char *, asection *));
193
194static bfd_reloc_status_type mmix_elf_perform_relocation
195 PARAMS ((asection *, reloc_howto_type *, PTR, bfd_vma, bfd_vma));
196
b34976b6 197static bfd_boolean mmix_elf_section_from_bfd_section
af746e92 198 PARAMS ((bfd *, asection *, int *));
3c3bdf30 199
b34976b6 200static bfd_boolean mmix_elf_add_symbol_hook
555cd476 201 PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Sym *,
3c3bdf30
NC		 202 const char **, flagword *, asection **, bfd_vma *));
203
b34976b6 204static bfd_boolean mmix_elf_is_local_label_name
3c3bdf30
NC		 205 PARAMS ((bfd *, const char *));
206
930b4cb2
HPN		 207static int bpo_reloc_request_sort_fn PARAMS ((const PTR, const PTR));
208
b34976b6 209static bfd_boolean mmix_elf_relax_section
930b4cb2 210 PARAMS ((bfd *abfd, asection *sec, struct bfd_link_info *link_info,
b34976b6 211 bfd_boolean *again));
930b4cb2 212
b34976b6 213extern bfd_boolean mmix_elf_final_link PARAMS ((bfd *, struct bfd_link_info *));
3c3bdf30
NC		 214
215extern void mmix_elf_symbol_processing PARAMS ((bfd *, asymbol *));
216
4fa5c2a8
HPN		 217/* Only intended to be called from a debugger. */
218extern void mmix_dump_bpo_gregs
219 PARAMS ((struct bfd_link_info *, bfd_error_handler_type));
220
f60ebe14
HPN		 221static void
222mmix_set_relaxable_size
223 PARAMS ((bfd *, asection *, void *));
224
f60ebe14 225
3c3bdf30
NC		 226/* Watch out: this currently needs to have elements with the same index as
227 their R_MMIX_ number. */
228static reloc_howto_type elf_mmix_howto_table[] =
229 {
230 /* This reloc does nothing. */
231 HOWTO (R_MMIX_NONE, /* type */
232 0, /* rightshift */
233 2, /* size (0 = byte, 1 = short, 2 = long) */
234 32, /* bitsize */
b34976b6 235 FALSE, /* pc_relative */
3c3bdf30
NC		 236 0, /* bitpos */
237 complain_overflow_bitfield, /* complain_on_overflow */
238 bfd_elf_generic_reloc, /* special_function */
239 "R_MMIX_NONE", /* name */
b34976b6 240 FALSE, /* partial_inplace */
3c3bdf30
NC		 241 0, /* src_mask */
242 0, /* dst_mask */
b34976b6 243 FALSE), /* pcrel_offset */
3c3bdf30
NC		 244
245 /* An 8 bit absolute relocation. */
246 HOWTO (R_MMIX_8, /* type */
247 0, /* rightshift */
248 0, /* size (0 = byte, 1 = short, 2 = long) */
249 8, /* bitsize */
b34976b6 250 FALSE, /* pc_relative */
3c3bdf30
NC		 251 0, /* bitpos */
252 complain_overflow_bitfield, /* complain_on_overflow */
253 bfd_elf_generic_reloc, /* special_function */
254 "R_MMIX_8", /* name */
b34976b6 255 FALSE, /* partial_inplace */
930b4cb2 256 0, /* src_mask */
3c3bdf30 257 0xff, /* dst_mask */
b34976b6 258 FALSE), /* pcrel_offset */
3c3bdf30
NC		 259
260 /* An 16 bit absolute relocation. */
261 HOWTO (R_MMIX_16, /* type */
262 0, /* rightshift */
263 1, /* size (0 = byte, 1 = short, 2 = long) */
264 16, /* bitsize */
b34976b6 265 FALSE, /* pc_relative */
3c3bdf30
NC		 266 0, /* bitpos */
267 complain_overflow_bitfield, /* complain_on_overflow */
268 bfd_elf_generic_reloc, /* special_function */
269 "R_MMIX_16", /* name */
b34976b6 270 FALSE, /* partial_inplace */
930b4cb2 271 0, /* src_mask */
3c3bdf30 272 0xffff, /* dst_mask */
b34976b6 273 FALSE), /* pcrel_offset */
3c3bdf30
NC		 274
275 /* An 24 bit absolute relocation. */
276 HOWTO (R_MMIX_24, /* type */
277 0, /* rightshift */
278 2, /* size (0 = byte, 1 = short, 2 = long) */
279 24, /* bitsize */
b34976b6 280 FALSE, /* pc_relative */
3c3bdf30
NC		 281 0, /* bitpos */
282 complain_overflow_bitfield, /* complain_on_overflow */
283 bfd_elf_generic_reloc, /* special_function */
284 "R_MMIX_24", /* name */
b34976b6 285 FALSE, /* partial_inplace */
930b4cb2 286 ~0xffffff, /* src_mask */
3c3bdf30 287 0xffffff, /* dst_mask */
b34976b6 288 FALSE), /* pcrel_offset */
3c3bdf30
NC		 289
290 /* A 32 bit absolute relocation. */
291 HOWTO (R_MMIX_32, /* type */
292 0, /* rightshift */
293 2, /* size (0 = byte, 1 = short, 2 = long) */
294 32, /* bitsize */
b34976b6 295 FALSE, /* pc_relative */
3c3bdf30
NC		 296 0, /* bitpos */
297 complain_overflow_bitfield, /* complain_on_overflow */
298 bfd_elf_generic_reloc, /* special_function */
299 "R_MMIX_32", /* name */
b34976b6 300 FALSE, /* partial_inplace */
930b4cb2 301 0, /* src_mask */
3c3bdf30 302 0xffffffff, /* dst_mask */
b34976b6 303 FALSE), /* pcrel_offset */
3c3bdf30
NC		 304
305 /* 64 bit relocation. */
306 HOWTO (R_MMIX_64, /* type */
307 0, /* rightshift */
308 4, /* size (0 = byte, 1 = short, 2 = long) */
309 64, /* bitsize */
b34976b6 310 FALSE, /* pc_relative */
3c3bdf30
NC		 311 0, /* bitpos */
312 complain_overflow_bitfield, /* complain_on_overflow */
313 bfd_elf_generic_reloc, /* special_function */
314 "R_MMIX_64", /* name */
b34976b6 315 FALSE, /* partial_inplace */
930b4cb2 316 0, /* src_mask */
3c3bdf30 317 MINUS_ONE, /* dst_mask */
b34976b6 318 FALSE), /* pcrel_offset */
3c3bdf30
NC		 319
320 /* An 8 bit PC-relative relocation. */
321 HOWTO (R_MMIX_PC_8, /* type */
322 0, /* rightshift */
323 0, /* size (0 = byte, 1 = short, 2 = long) */
324 8, /* bitsize */
b34976b6 325 TRUE, /* pc_relative */
3c3bdf30
NC		 326 0, /* bitpos */
327 complain_overflow_bitfield, /* complain_on_overflow */
328 bfd_elf_generic_reloc, /* special_function */
329 "R_MMIX_PC_8", /* name */
b34976b6 330 FALSE, /* partial_inplace */
930b4cb2 331 0, /* src_mask */
3c3bdf30 332 0xff, /* dst_mask */
b34976b6 333 TRUE), /* pcrel_offset */
3c3bdf30
NC		 334
335 /* An 16 bit PC-relative relocation. */
336 HOWTO (R_MMIX_PC_16, /* type */
337 0, /* rightshift */
338 1, /* size (0 = byte, 1 = short, 2 = long) */
339 16, /* bitsize */
b34976b6 340 TRUE, /* pc_relative */
3c3bdf30
NC		 341 0, /* bitpos */
342 complain_overflow_bitfield, /* complain_on_overflow */
343 bfd_elf_generic_reloc, /* special_function */
344 "R_MMIX_PC_16", /* name */
b34976b6 345 FALSE, /* partial_inplace */
930b4cb2 346 0, /* src_mask */
3c3bdf30 347 0xffff, /* dst_mask */
b34976b6 348 TRUE), /* pcrel_offset */
3c3bdf30
NC		 349
350 /* An 24 bit PC-relative relocation. */
351 HOWTO (R_MMIX_PC_24, /* type */
352 0, /* rightshift */
353 2, /* size (0 = byte, 1 = short, 2 = long) */
354 24, /* bitsize */
b34976b6 355 TRUE, /* pc_relative */
3c3bdf30
NC		 356 0, /* bitpos */
357 complain_overflow_bitfield, /* complain_on_overflow */
358 bfd_elf_generic_reloc, /* special_function */
359 "R_MMIX_PC_24", /* name */
b34976b6 360 FALSE, /* partial_inplace */
930b4cb2 361 ~0xffffff, /* src_mask */
3c3bdf30 362 0xffffff, /* dst_mask */
b34976b6 363 TRUE), /* pcrel_offset */
3c3bdf30
NC		 364
365 /* A 32 bit absolute PC-relative relocation. */
366 HOWTO (R_MMIX_PC_32, /* type */
367 0, /* rightshift */
368 2, /* size (0 = byte, 1 = short, 2 = long) */
369 32, /* bitsize */
b34976b6 370 TRUE, /* pc_relative */
3c3bdf30
NC		 371 0, /* bitpos */
372 complain_overflow_bitfield, /* complain_on_overflow */
373 bfd_elf_generic_reloc, /* special_function */
374 "R_MMIX_PC_32", /* name */
b34976b6 375 FALSE, /* partial_inplace */
930b4cb2 376 0, /* src_mask */
3c3bdf30 377 0xffffffff, /* dst_mask */
b34976b6 378 TRUE), /* pcrel_offset */
3c3bdf30
NC		 379
380 /* 64 bit PC-relative relocation. */
381 HOWTO (R_MMIX_PC_64, /* type */
382 0, /* rightshift */
383 4, /* size (0 = byte, 1 = short, 2 = long) */
384 64, /* bitsize */
b34976b6 385 TRUE, /* pc_relative */
3c3bdf30
NC		 386 0, /* bitpos */
387 complain_overflow_bitfield, /* complain_on_overflow */
388 bfd_elf_generic_reloc, /* special_function */
389 "R_MMIX_PC_64", /* name */
b34976b6 390 FALSE, /* partial_inplace */
930b4cb2 391 0, /* src_mask */
3c3bdf30 392 MINUS_ONE, /* dst_mask */
b34976b6 393 TRUE), /* pcrel_offset */
3c3bdf30
NC		 394
395 /* GNU extension to record C++ vtable hierarchy. */
396 HOWTO (R_MMIX_GNU_VTINHERIT, /* type */
397 0, /* rightshift */
398 0, /* size (0 = byte, 1 = short, 2 = long) */
399 0, /* bitsize */
b34976b6 400 FALSE, /* pc_relative */
3c3bdf30
NC		 401 0, /* bitpos */
402 complain_overflow_dont, /* complain_on_overflow */
403 NULL, /* special_function */
404 "R_MMIX_GNU_VTINHERIT", /* name */
b34976b6 405 FALSE, /* partial_inplace */
3c3bdf30
NC		 406 0, /* src_mask */
407 0, /* dst_mask */
b34976b6 408 TRUE), /* pcrel_offset */
3c3bdf30
NC		 409
410 /* GNU extension to record C++ vtable member usage. */
411 HOWTO (R_MMIX_GNU_VTENTRY, /* type */
412 0, /* rightshift */
413 0, /* size (0 = byte, 1 = short, 2 = long) */
414 0, /* bitsize */
b34976b6 415 FALSE, /* pc_relative */
3c3bdf30
NC		 416 0, /* bitpos */
417 complain_overflow_dont, /* complain_on_overflow */
418 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
419 "R_MMIX_GNU_VTENTRY", /* name */
b34976b6 420 FALSE, /* partial_inplace */
3c3bdf30
NC		 421 0, /* src_mask */
422 0, /* dst_mask */
b34976b6 423 FALSE), /* pcrel_offset */
3c3bdf30
NC		 424
425 /* The GETA relocation is supposed to get any address that could
426 possibly be reached by the GETA instruction. It can silently expand
427 to get a 64-bit operand, but will complain if any of the two least
428 significant bits are set. The howto members reflect a simple GETA. */
429 HOWTO (R_MMIX_GETA, /* type */
430 2, /* rightshift */
431 2, /* size (0 = byte, 1 = short, 2 = long) */
432 19, /* bitsize */
b34976b6 433 TRUE, /* pc_relative */
3c3bdf30
NC		 434 0, /* bitpos */
435 complain_overflow_signed, /* complain_on_overflow */
436 mmix_elf_reloc, /* special_function */
437 "R_MMIX_GETA", /* name */
b34976b6 438 FALSE, /* partial_inplace */
930b4cb2 439 ~0x0100ffff, /* src_mask */
3c3bdf30 440 0x0100ffff, /* dst_mask */
b34976b6 441 TRUE), /* pcrel_offset */
3c3bdf30
NC		 442
443 HOWTO (R_MMIX_GETA_1, /* type */
444 2, /* rightshift */
445 2, /* size (0 = byte, 1 = short, 2 = long) */
446 19, /* bitsize */
b34976b6 447 TRUE, /* pc_relative */
3c3bdf30
NC		 448 0, /* bitpos */
449 complain_overflow_signed, /* complain_on_overflow */
450 mmix_elf_reloc, /* special_function */
451 "R_MMIX_GETA_1", /* name */
b34976b6 452 FALSE, /* partial_inplace */
930b4cb2 453 ~0x0100ffff, /* src_mask */
3c3bdf30 454 0x0100ffff, /* dst_mask */
b34976b6 455 TRUE), /* pcrel_offset */
3c3bdf30
NC		 456
457 HOWTO (R_MMIX_GETA_2, /* type */
458 2, /* rightshift */
459 2, /* size (0 = byte, 1 = short, 2 = long) */
460 19, /* bitsize */
b34976b6 461 TRUE, /* pc_relative */
3c3bdf30
NC		 462 0, /* bitpos */
463 complain_overflow_signed, /* complain_on_overflow */
464 mmix_elf_reloc, /* special_function */
465 "R_MMIX_GETA_2", /* name */
b34976b6 466 FALSE, /* partial_inplace */
930b4cb2 467 ~0x0100ffff, /* src_mask */
3c3bdf30 468 0x0100ffff, /* dst_mask */
b34976b6 469 TRUE), /* pcrel_offset */
3c3bdf30
NC		 470
471 HOWTO (R_MMIX_GETA_3, /* type */
472 2, /* rightshift */
473 2, /* size (0 = byte, 1 = short, 2 = long) */
474 19, /* bitsize */
b34976b6 475 TRUE, /* pc_relative */
3c3bdf30
NC		 476 0, /* bitpos */
477 complain_overflow_signed, /* complain_on_overflow */
478 mmix_elf_reloc, /* special_function */
479 "R_MMIX_GETA_3", /* name */
b34976b6 480 FALSE, /* partial_inplace */
930b4cb2 481 ~0x0100ffff, /* src_mask */
3c3bdf30 482 0x0100ffff, /* dst_mask */
b34976b6 483 TRUE), /* pcrel_offset */
3c3bdf30
NC		 484
485 /* The conditional branches are supposed to reach any (code) address.
486 It can silently expand to a 64-bit operand, but will emit an error if
487 any of the two least significant bits are set. The howto members
488 reflect a simple branch. */
489 HOWTO (R_MMIX_CBRANCH, /* type */
490 2, /* rightshift */
491 2, /* size (0 = byte, 1 = short, 2 = long) */
492 19, /* bitsize */
b34976b6 493 TRUE, /* pc_relative */
3c3bdf30
NC		 494 0, /* bitpos */
495 complain_overflow_signed, /* complain_on_overflow */
496 mmix_elf_reloc, /* special_function */
497 "R_MMIX_CBRANCH", /* name */
b34976b6 498 FALSE, /* partial_inplace */
930b4cb2 499 ~0x0100ffff, /* src_mask */
3c3bdf30 500 0x0100ffff, /* dst_mask */
b34976b6 501 TRUE), /* pcrel_offset */
3c3bdf30
NC		 502
503 HOWTO (R_MMIX_CBRANCH_J, /* type */
504 2, /* rightshift */
505 2, /* size (0 = byte, 1 = short, 2 = long) */
506 19, /* bitsize */
b34976b6 507 TRUE, /* pc_relative */
3c3bdf30
NC		 508 0, /* bitpos */
509 complain_overflow_signed, /* complain_on_overflow */
510 mmix_elf_reloc, /* special_function */
511 "R_MMIX_CBRANCH_J", /* name */
b34976b6 512 FALSE, /* partial_inplace */
930b4cb2 513 ~0x0100ffff, /* src_mask */
3c3bdf30 514 0x0100ffff, /* dst_mask */
b34976b6 515 TRUE), /* pcrel_offset */
3c3bdf30
NC		 516
517 HOWTO (R_MMIX_CBRANCH_1, /* type */
518 2, /* rightshift */
519 2, /* size (0 = byte, 1 = short, 2 = long) */
520 19, /* bitsize */
b34976b6 521 TRUE, /* pc_relative */
3c3bdf30
NC		 522 0, /* bitpos */
523 complain_overflow_signed, /* complain_on_overflow */
524 mmix_elf_reloc, /* special_function */
525 "R_MMIX_CBRANCH_1", /* name */
b34976b6 526 FALSE, /* partial_inplace */
930b4cb2 527 ~0x0100ffff, /* src_mask */
3c3bdf30 528 0x0100ffff, /* dst_mask */
b34976b6 529 TRUE), /* pcrel_offset */
3c3bdf30
NC		 530
531 HOWTO (R_MMIX_CBRANCH_2, /* type */
532 2, /* rightshift */
533 2, /* size (0 = byte, 1 = short, 2 = long) */
534 19, /* bitsize */
b34976b6 535 TRUE, /* pc_relative */
3c3bdf30
NC		 536 0, /* bitpos */
537 complain_overflow_signed, /* complain_on_overflow */
538 mmix_elf_reloc, /* special_function */
539 "R_MMIX_CBRANCH_2", /* name */
b34976b6 540 FALSE, /* partial_inplace */
930b4cb2 541 ~0x0100ffff, /* src_mask */
3c3bdf30 542 0x0100ffff, /* dst_mask */
b34976b6 543 TRUE), /* pcrel_offset */
3c3bdf30
NC		 544
545 HOWTO (R_MMIX_CBRANCH_3, /* type */
546 2, /* rightshift */
547 2, /* size (0 = byte, 1 = short, 2 = long) */
548 19, /* bitsize */
b34976b6 549 TRUE, /* pc_relative */
3c3bdf30
NC		 550 0, /* bitpos */
551 complain_overflow_signed, /* complain_on_overflow */
552 mmix_elf_reloc, /* special_function */
553 "R_MMIX_CBRANCH_3", /* name */
b34976b6 554 FALSE, /* partial_inplace */
930b4cb2 555 ~0x0100ffff, /* src_mask */
3c3bdf30 556 0x0100ffff, /* dst_mask */
b34976b6 557 TRUE), /* pcrel_offset */
3c3bdf30
NC		 558
559 /* The PUSHJ instruction can reach any (code) address, as long as it's
560 the beginning of a function (no usable restriction). It can silently
561 expand to a 64-bit operand, but will emit an error if any of the two
f60ebe14
HPN		 562 least significant bits are set. It can also expand into a call to a
563 stub; see R_MMIX_PUSHJ_STUBBABLE. The howto members reflect a simple
3c3bdf30
NC		 564 PUSHJ. */
565 HOWTO (R_MMIX_PUSHJ, /* type */
566 2, /* rightshift */
567 2, /* size (0 = byte, 1 = short, 2 = long) */
568 19, /* bitsize */
b34976b6 569 TRUE, /* pc_relative */
3c3bdf30
NC		 570 0, /* bitpos */
571 complain_overflow_signed, /* complain_on_overflow */
572 mmix_elf_reloc, /* special_function */
573 "R_MMIX_PUSHJ", /* name */
b34976b6 574 FALSE, /* partial_inplace */
930b4cb2 575 ~0x0100ffff, /* src_mask */
3c3bdf30 576 0x0100ffff, /* dst_mask */
b34976b6 577 TRUE), /* pcrel_offset */
3c3bdf30
NC		 578
579 HOWTO (R_MMIX_PUSHJ_1, /* type */
580 2, /* rightshift */
581 2, /* size (0 = byte, 1 = short, 2 = long) */
582 19, /* bitsize */
b34976b6 583 TRUE, /* pc_relative */
3c3bdf30
NC		 584 0, /* bitpos */
585 complain_overflow_signed, /* complain_on_overflow */
586 mmix_elf_reloc, /* special_function */
587 "R_MMIX_PUSHJ_1", /* name */
b34976b6 588 FALSE, /* partial_inplace */
930b4cb2 589 ~0x0100ffff, /* src_mask */
3c3bdf30 590 0x0100ffff, /* dst_mask */
b34976b6 591 TRUE), /* pcrel_offset */
3c3bdf30
NC		 592
593 HOWTO (R_MMIX_PUSHJ_2, /* type */
594 2, /* rightshift */
595 2, /* size (0 = byte, 1 = short, 2 = long) */
596 19, /* bitsize */
b34976b6 597 TRUE, /* pc_relative */
3c3bdf30
NC		 598 0, /* bitpos */
599 complain_overflow_signed, /* complain_on_overflow */
600 mmix_elf_reloc, /* special_function */
601 "R_MMIX_PUSHJ_2", /* name */
b34976b6 602 FALSE, /* partial_inplace */
930b4cb2 603 ~0x0100ffff, /* src_mask */
3c3bdf30 604 0x0100ffff, /* dst_mask */
b34976b6 605 TRUE), /* pcrel_offset */
3c3bdf30
NC		 606
607 HOWTO (R_MMIX_PUSHJ_3, /* type */
608 2, /* rightshift */
609 2, /* size (0 = byte, 1 = short, 2 = long) */
610 19, /* bitsize */
b34976b6 611 TRUE, /* pc_relative */
3c3bdf30
NC		 612 0, /* bitpos */
613 complain_overflow_signed, /* complain_on_overflow */
614 mmix_elf_reloc, /* special_function */
615 "R_MMIX_PUSHJ_3", /* name */
b34976b6 616 FALSE, /* partial_inplace */
930b4cb2 617 ~0x0100ffff, /* src_mask */
3c3bdf30 618 0x0100ffff, /* dst_mask */
b34976b6 619 TRUE), /* pcrel_offset */
3c3bdf30
NC		 620
621 /* A JMP is supposed to reach any (code) address. By itself, it can
622 reach +-64M; the expansion can reach all 64 bits. Note that the 64M
623 limit is soon reached if you link the program in wildly different
624 memory segments. The howto members reflect a trivial JMP. */
625 HOWTO (R_MMIX_JMP, /* type */
626 2, /* rightshift */
627 2, /* size (0 = byte, 1 = short, 2 = long) */
628 27, /* bitsize */
b34976b6 629 TRUE, /* pc_relative */
3c3bdf30
NC		 630 0, /* bitpos */
631 complain_overflow_signed, /* complain_on_overflow */
632 mmix_elf_reloc, /* special_function */
633 "R_MMIX_JMP", /* name */
b34976b6 634 FALSE, /* partial_inplace */
930b4cb2 635 ~0x1ffffff, /* src_mask */
3c3bdf30 636 0x1ffffff, /* dst_mask */
b34976b6 637 TRUE), /* pcrel_offset */
3c3bdf30
NC		 638
639 HOWTO (R_MMIX_JMP_1, /* type */
640 2, /* rightshift */
641 2, /* size (0 = byte, 1 = short, 2 = long) */
642 27, /* bitsize */
b34976b6 643 TRUE, /* pc_relative */
3c3bdf30
NC		 644 0, /* bitpos */
645 complain_overflow_signed, /* complain_on_overflow */
646 mmix_elf_reloc, /* special_function */
647 "R_MMIX_JMP_1", /* name */
b34976b6 648 FALSE, /* partial_inplace */
930b4cb2 649 ~0x1ffffff, /* src_mask */
3c3bdf30 650 0x1ffffff, /* dst_mask */
b34976b6 651 TRUE), /* pcrel_offset */
3c3bdf30
NC		 652
653 HOWTO (R_MMIX_JMP_2, /* type */
654 2, /* rightshift */
655 2, /* size (0 = byte, 1 = short, 2 = long) */
656 27, /* bitsize */
b34976b6 657 TRUE, /* pc_relative */
3c3bdf30
NC		 658 0, /* bitpos */
659 complain_overflow_signed, /* complain_on_overflow */
660 mmix_elf_reloc, /* special_function */
661 "R_MMIX_JMP_2", /* name */
b34976b6 662 FALSE, /* partial_inplace */
930b4cb2 663 ~0x1ffffff, /* src_mask */
3c3bdf30 664 0x1ffffff, /* dst_mask */
b34976b6 665 TRUE), /* pcrel_offset */
3c3bdf30
NC		 666
667 HOWTO (R_MMIX_JMP_3, /* type */
668 2, /* rightshift */
669 2, /* size (0 = byte, 1 = short, 2 = long) */
670 27, /* bitsize */
b34976b6 671 TRUE, /* pc_relative */
3c3bdf30
NC		 672 0, /* bitpos */
673 complain_overflow_signed, /* complain_on_overflow */
674 mmix_elf_reloc, /* special_function */
675 "R_MMIX_JMP_3", /* name */
b34976b6 676 FALSE, /* partial_inplace */
930b4cb2 677 ~0x1ffffff, /* src_mask */
3c3bdf30 678 0x1ffffff, /* dst_mask */
b34976b6 679 TRUE), /* pcrel_offset */
3c3bdf30
NC		 680
681 /* When we don't emit link-time-relaxable code from the assembler, or
682 when relaxation has done all it can do, these relocs are used. For
683 GETA/PUSHJ/branches. */
684 HOWTO (R_MMIX_ADDR19, /* type */
685 2, /* rightshift */
686 2, /* size (0 = byte, 1 = short, 2 = long) */
687 19, /* bitsize */
b34976b6 688 TRUE, /* pc_relative */
3c3bdf30
NC		 689 0, /* bitpos */
690 complain_overflow_signed, /* complain_on_overflow */
691 mmix_elf_reloc, /* special_function */
692 "R_MMIX_ADDR19", /* name */
b34976b6 693 FALSE, /* partial_inplace */
930b4cb2 694 ~0x0100ffff, /* src_mask */
3c3bdf30 695 0x0100ffff, /* dst_mask */
b34976b6 696 TRUE), /* pcrel_offset */
3c3bdf30
NC		 697
698 /* For JMP. */
699 HOWTO (R_MMIX_ADDR27, /* type */
700 2, /* rightshift */
701 2, /* size (0 = byte, 1 = short, 2 = long) */
702 27, /* bitsize */
b34976b6 703 TRUE, /* pc_relative */
3c3bdf30
NC		 704 0, /* bitpos */
705 complain_overflow_signed, /* complain_on_overflow */
706 mmix_elf_reloc, /* special_function */
707 "R_MMIX_ADDR27", /* name */
b34976b6 708 FALSE, /* partial_inplace */
930b4cb2 709 ~0x1ffffff, /* src_mask */
3c3bdf30 710 0x1ffffff, /* dst_mask */
b34976b6 711 TRUE), /* pcrel_offset */
3c3bdf30
NC		 712
713 /* A general register or the value 0..255. If a value, then the
714 instruction (offset -3) needs adjusting. */
715 HOWTO (R_MMIX_REG_OR_BYTE, /* type */
716 0, /* rightshift */
717 1, /* size (0 = byte, 1 = short, 2 = long) */
718 8, /* bitsize */
b34976b6 719 FALSE, /* pc_relative */
3c3bdf30
NC		 720 0, /* bitpos */
721 complain_overflow_bitfield, /* complain_on_overflow */
722 mmix_elf_reloc, /* special_function */
723 "R_MMIX_REG_OR_BYTE", /* name */
b34976b6 724 FALSE, /* partial_inplace */
930b4cb2 725 0, /* src_mask */
3c3bdf30 726 0xff, /* dst_mask */
b34976b6 727 FALSE), /* pcrel_offset */
3c3bdf30
NC		 728
729 /* A general register. */
730 HOWTO (R_MMIX_REG, /* type */
731 0, /* rightshift */
732 1, /* size (0 = byte, 1 = short, 2 = long) */
733 8, /* bitsize */
b34976b6 734 FALSE, /* pc_relative */
3c3bdf30
NC		 735 0, /* bitpos */
736 complain_overflow_bitfield, /* complain_on_overflow */
737 mmix_elf_reloc, /* special_function */
738 "R_MMIX_REG", /* name */
b34976b6 739 FALSE, /* partial_inplace */
930b4cb2 740 0, /* src_mask */
3c3bdf30 741 0xff, /* dst_mask */
b34976b6 742 FALSE), /* pcrel_offset */
3c3bdf30
NC		 743
744 /* A register plus an index, corresponding to the relocation expression.
745 The sizes must correspond to the valid range of the expression, while
746 the bitmasks correspond to what we store in the image. */
747 HOWTO (R_MMIX_BASE_PLUS_OFFSET, /* type */
748 0, /* rightshift */
749 4, /* size (0 = byte, 1 = short, 2 = long) */
750 64, /* bitsize */
b34976b6 751 FALSE, /* pc_relative */
3c3bdf30
NC		 752 0, /* bitpos */
753 complain_overflow_bitfield, /* complain_on_overflow */
754 mmix_elf_reloc, /* special_function */
755 "R_MMIX_BASE_PLUS_OFFSET", /* name */
b34976b6 756 FALSE, /* partial_inplace */
930b4cb2 757 0, /* src_mask */
3c3bdf30 758 0xffff, /* dst_mask */
b34976b6 759 FALSE), /* pcrel_offset */
3c3bdf30
NC		 760
761 /* A "magic" relocation for a LOCAL expression, asserting that the
762 expression is less than the number of global registers. No actual
763 modification of the contents is done. Implementing this as a
764 relocation was less intrusive than e.g. putting such expressions in a
765 section to discard *after* relocation. */
766 HOWTO (R_MMIX_LOCAL, /* type */
767 0, /* rightshift */
768 0, /* size (0 = byte, 1 = short, 2 = long) */
769 0, /* bitsize */
b34976b6 770 FALSE, /* pc_relative */
3c3bdf30
NC		 771 0, /* bitpos */
772 complain_overflow_dont, /* complain_on_overflow */
773 mmix_elf_reloc, /* special_function */
774 "R_MMIX_LOCAL", /* name */
b34976b6 775 FALSE, /* partial_inplace */
3c3bdf30
NC		 776 0, /* src_mask */
777 0, /* dst_mask */
b34976b6 778 FALSE), /* pcrel_offset */
f60ebe14
HPN		 779
780 HOWTO (R_MMIX_PUSHJ_STUBBABLE, /* type */
781 2, /* rightshift */
782 2, /* size (0 = byte, 1 = short, 2 = long) */
783 19, /* bitsize */
784 TRUE, /* pc_relative */
785 0, /* bitpos */
786 complain_overflow_signed, /* complain_on_overflow */
787 mmix_elf_reloc, /* special_function */
788 "R_MMIX_PUSHJ_STUBBABLE", /* name */
789 FALSE, /* partial_inplace */
790 ~0x0100ffff, /* src_mask */
791 0x0100ffff, /* dst_mask */
792 TRUE) /* pcrel_offset */
3c3bdf30
NC		 793 };
794
795
796/* Map BFD reloc types to MMIX ELF reloc types. */
797
798struct mmix_reloc_map
799 {
800 bfd_reloc_code_real_type bfd_reloc_val;
801 enum elf_mmix_reloc_type elf_reloc_val;
802 };
803
804
805static const struct mmix_reloc_map mmix_reloc_map[] =
806 {
807 {BFD_RELOC_NONE, R_MMIX_NONE},
808 {BFD_RELOC_8, R_MMIX_8},
809 {BFD_RELOC_16, R_MMIX_16},
810 {BFD_RELOC_24, R_MMIX_24},
811 {BFD_RELOC_32, R_MMIX_32},
812 {BFD_RELOC_64, R_MMIX_64},
813 {BFD_RELOC_8_PCREL, R_MMIX_PC_8},
814 {BFD_RELOC_16_PCREL, R_MMIX_PC_16},
815 {BFD_RELOC_24_PCREL, R_MMIX_PC_24},
816 {BFD_RELOC_32_PCREL, R_MMIX_PC_32},
817 {BFD_RELOC_64_PCREL, R_MMIX_PC_64},
818 {BFD_RELOC_VTABLE_INHERIT, R_MMIX_GNU_VTINHERIT},
819 {BFD_RELOC_VTABLE_ENTRY, R_MMIX_GNU_VTENTRY},
820 {BFD_RELOC_MMIX_GETA, R_MMIX_GETA},
821 {BFD_RELOC_MMIX_CBRANCH, R_MMIX_CBRANCH},
822 {BFD_RELOC_MMIX_PUSHJ, R_MMIX_PUSHJ},
823 {BFD_RELOC_MMIX_JMP, R_MMIX_JMP},
824 {BFD_RELOC_MMIX_ADDR19, R_MMIX_ADDR19},
825 {BFD_RELOC_MMIX_ADDR27, R_MMIX_ADDR27},
826 {BFD_RELOC_MMIX_REG_OR_BYTE, R_MMIX_REG_OR_BYTE},
827 {BFD_RELOC_MMIX_REG, R_MMIX_REG},
828 {BFD_RELOC_MMIX_BASE_PLUS_OFFSET, R_MMIX_BASE_PLUS_OFFSET},
f60ebe14
HPN		 829 {BFD_RELOC_MMIX_LOCAL, R_MMIX_LOCAL},
830 {BFD_RELOC_MMIX_PUSHJ_STUBBABLE, R_MMIX_PUSHJ_STUBBABLE}
3c3bdf30
NC		 831 };
832
833static reloc_howto_type *
834bfd_elf64_bfd_reloc_type_lookup (abfd, code)
835 bfd *abfd ATTRIBUTE_UNUSED;
836 bfd_reloc_code_real_type code;
837{
838 unsigned int i;
839
840 for (i = 0;
841 i < sizeof (mmix_reloc_map) / sizeof (mmix_reloc_map[0]);
842 i++)
843 {
844 if (mmix_reloc_map[i].bfd_reloc_val == code)
845 return &elf_mmix_howto_table[mmix_reloc_map[i].elf_reloc_val];
846 }
847
848 return NULL;
849}
850
f0abc2a1
AM		 851static bfd_boolean
852mmix_elf_new_section_hook (abfd, sec)
853 bfd *abfd;
854 asection *sec;
855{
f592407e
AM		 856 if (!sec->used_by_bfd)
857 {
858 struct _mmix_elf_section_data *sdata;
859 bfd_size_type amt = sizeof (*sdata);
f0abc2a1 860
f592407e
AM		 861 sdata = bfd_zalloc (abfd, amt);
862 if (sdata == NULL)
863 return FALSE;
864 sec->used_by_bfd = sdata;
865 }
f0abc2a1
AM		 866
867 return _bfd_elf_new_section_hook (abfd, sec);
868}
869
3c3bdf30
NC		 870
871/* This function performs the actual bitfiddling and sanity check for a
872 final relocation. Each relocation gets its *worst*-case expansion
873 in size when it arrives here; any reduction in size should have been
874 caught in linker relaxation earlier. When we get here, the relocation
875 looks like the smallest instruction with SWYM:s (nop:s) appended to the
876 max size. We fill in those nop:s.
877
878 R_MMIX_GETA: (FIXME: Relaxation should break this up in 1, 2, 3 tetra)
879 GETA $N,foo
880 ->
881 SETL $N,foo & 0xffff
882 INCML $N,(foo >> 16) & 0xffff
883 INCMH $N,(foo >> 32) & 0xffff
884 INCH $N,(foo >> 48) & 0xffff
885
886 R_MMIX_CBRANCH: (FIXME: Relaxation should break this up, but
887 condbranches needing relaxation might be rare enough to not be
888 worthwhile.)
889 [P]Bcc $N,foo
890 ->
891 [~P]B~cc $N,.+20
892 SETL $255,foo & ...
893 INCML ...
894 INCMH ...
895 INCH ...
896 GO $255,$255,0
897
898 R_MMIX_PUSHJ: (FIXME: Relaxation...)
899 PUSHJ $N,foo
900 ->
901 SETL $255,foo & ...
902 INCML ...
903 INCMH ...
904 INCH ...
905 PUSHGO $N,$255,0
906
907 R_MMIX_JMP: (FIXME: Relaxation...)
908 JMP foo
909 ->
910 SETL $255,foo & ...
911 INCML ...
912 INCMH ...
913 INCH ...
914 GO $255,$255,0
915
916 R_MMIX_ADDR19 and R_MMIX_ADDR27 are just filled in. */
917
918static bfd_reloc_status_type
919mmix_elf_perform_relocation (isec, howto, datap, addr, value)
920 asection *isec;
921 reloc_howto_type *howto;
922 PTR datap;
f60ebe14 923 bfd_vma addr;
3c3bdf30
NC		 924 bfd_vma value;
925{
926 bfd *abfd = isec->owner;
927 bfd_reloc_status_type flag = bfd_reloc_ok;
928 bfd_reloc_status_type r;
929 int offs = 0;
930 int reg = 255;
931
932 /* The worst case bits are all similar SETL/INCML/INCMH/INCH sequences.
933 We handle the differences here and the common sequence later. */
934 switch (howto->type)
935 {
936 case R_MMIX_GETA:
937 offs = 0;
938 reg = bfd_get_8 (abfd, (bfd_byte *) datap + 1);
939
940 /* We change to an absolute value. */
941 value += addr;
942 break;
943
944 case R_MMIX_CBRANCH:
945 {
946 int in1 = bfd_get_16 (abfd, (bfd_byte *) datap) << 16;
947
948 /* Invert the condition and prediction bit, and set the offset
949 to five instructions ahead.
950
951 We *can* do better if we want to. If the branch is found to be
952 within limits, we could leave the branch as is; there'll just
953 be a bunch of NOP:s after it. But we shouldn't see this
954 sequence often enough that it's worth doing it. */
955
956 bfd_put_32 (abfd,
957 (((in1 ^ ((PRED_INV_BIT | COND_INV_BIT) << 24)) & ~0xffff)
958 | (24/4)),
959 (bfd_byte *) datap);
960
961 /* Put a "GO $255,$255,0" after the common sequence. */
962 bfd_put_32 (abfd,
963 ((GO_INSN_BYTE | IMM_OFFSET_BIT) << 24) | 0xffff00,
964 (bfd_byte *) datap + 20);
965
966 /* Common sequence starts at offset 4. */
967 offs = 4;
968
969 /* We change to an absolute value. */
970 value += addr;
971 }
972 break;
973
f60ebe14
HPN		 974 case R_MMIX_PUSHJ_STUBBABLE:
975 /* If the address fits, we're fine. */
976 if ((value & 3) == 0
977 /* Note rightshift 0; see R_MMIX_JMP case below. */
978 && (r = bfd_check_overflow (complain_overflow_signed,
979 howto->bitsize,
980 0,
981 bfd_arch_bits_per_address (abfd),
982 value)) == bfd_reloc_ok)
983 goto pcrel_mmix_reloc_fits;
984 else
985 {
1a23a9e6 986 bfd_size_type size = isec->rawsize ? isec->rawsize : isec->size;
f60ebe14
HPN		 987
988 /* We have the bytes at the PUSHJ insn and need to get the
989 position for the stub. There's supposed to be room allocated
990 for the stub. */
991 bfd_byte *stubcontents
f075ee0c 992 = ((bfd_byte *) datap
f60ebe14 993 - (addr - (isec->output_section->vma + isec->output_offset))
eea6121a 994 + size
f60ebe14
HPN		 995 + mmix_elf_section_data (isec)->pjs.stub_offset);
996 bfd_vma stubaddr;
997
998 /* The address doesn't fit, so redirect the PUSHJ to the
999 location of the stub. */
1000 r = mmix_elf_perform_relocation (isec,
1001 &elf_mmix_howto_table
1002 [R_MMIX_ADDR19],
1003 datap,
1004 addr,
1005 isec->output_section->vma
1006 + isec->output_offset
eea6121a 1007 + size
f60ebe14
HPN		 1008 + (mmix_elf_section_data (isec)
1009 ->pjs.stub_offset)
1010 - addr);
1011 if (r != bfd_reloc_ok)
1012 return r;
1013
1014 stubaddr
1015 = (isec->output_section->vma
1016 + isec->output_offset
eea6121a 1017 + size
f60ebe14
HPN		 1018 + mmix_elf_section_data (isec)->pjs.stub_offset);
1019
1020 /* We generate a simple JMP if that suffices, else the whole 5
1021 insn stub. */
1022 if (bfd_check_overflow (complain_overflow_signed,
1023 elf_mmix_howto_table[R_MMIX_ADDR27].bitsize,
1024 0,
1025 bfd_arch_bits_per_address (abfd),
1026 addr + value - stubaddr) == bfd_reloc_ok)
1027 {
1028 bfd_put_32 (abfd, JMP_INSN_BYTE << 24, stubcontents);
1029 r = mmix_elf_perform_relocation (isec,
1030 &elf_mmix_howto_table
1031 [R_MMIX_ADDR27],
1032 stubcontents,
1033 stubaddr,
1034 value + addr - stubaddr);
1035 mmix_elf_section_data (isec)->pjs.stub_offset += 4;
1036
eea6121a
AM		 1037 if (size + mmix_elf_section_data (isec)->pjs.stub_offset
1038 > isec->size)
f60ebe14
HPN		 1039 abort ();
1040
1041 return r;
1042 }
1043 else
1044 {
1045 /* Put a "GO $255,0" after the common sequence. */
1046 bfd_put_32 (abfd,
1047 ((GO_INSN_BYTE | IMM_OFFSET_BIT) << 24)
1048 | 0xff00, (bfd_byte *) stubcontents + 16);
1049
1050 /* Prepare for the general code to set the first part of the
1051 linker stub, and */
1052 value += addr;
1053 datap = stubcontents;
1054 mmix_elf_section_data (isec)->pjs.stub_offset
1055 += MAX_PUSHJ_STUB_SIZE;
1056 }
1057 }
1058 break;
1059
3c3bdf30
NC		 1060 case R_MMIX_PUSHJ:
1061 {
1062 int inreg = bfd_get_8 (abfd, (bfd_byte *) datap + 1);
1063
1064 /* Put a "PUSHGO $N,$255,0" after the common sequence. */
1065 bfd_put_32 (abfd,
1066 ((PUSHGO_INSN_BYTE | IMM_OFFSET_BIT) << 24)
1067 | (inreg << 16)
1068 | 0xff00,
1069 (bfd_byte *) datap + 16);
1070
1071 /* We change to an absolute value. */
1072 value += addr;
1073 }
1074 break;
1075
1076 case R_MMIX_JMP:
1077 /* This one is a little special. If we get here on a non-relaxing
1078 link, and the destination is actually in range, we don't need to
1079 execute the nops.
1080 If so, we fall through to the bit-fiddling relocs.
1081
1082 FIXME: bfd_check_overflow seems broken; the relocation is
1083 rightshifted before testing, so supply a zero rightshift. */
1084
1085 if (! ((value & 3) == 0
1086 && (r = bfd_check_overflow (complain_overflow_signed,
1087 howto->bitsize,
1088 0,
1089 bfd_arch_bits_per_address (abfd),
1090 value)) == bfd_reloc_ok))
1091 {
1092 /* If the relocation doesn't fit in a JMP, we let the NOP:s be
1093 modified below, and put a "GO $255,$255,0" after the
1094 address-loading sequence. */
1095 bfd_put_32 (abfd,
1096 ((GO_INSN_BYTE | IMM_OFFSET_BIT) << 24)
1097 | 0xffff00,
1098 (bfd_byte *) datap + 16);
1099
1100 /* We change to an absolute value. */
1101 value += addr;
1102 break;
1103 }
cedb70c5 1104 /* FALLTHROUGH. */
3c3bdf30
NC		 1105 case R_MMIX_ADDR19:
1106 case R_MMIX_ADDR27:
f60ebe14 1107 pcrel_mmix_reloc_fits:
3c3bdf30
NC		 1108 /* These must be in range, or else we emit an error. */
1109 if ((value & 3) == 0
1110 /* Note rightshift 0; see above. */
1111 && (r = bfd_check_overflow (complain_overflow_signed,
1112 howto->bitsize,
1113 0,
1114 bfd_arch_bits_per_address (abfd),
1115 value)) == bfd_reloc_ok)
1116 {
1117 bfd_vma in1
1118 = bfd_get_32 (abfd, (bfd_byte *) datap);
1119 bfd_vma highbit;
1120
1121 if ((bfd_signed_vma) value < 0)
1122 {
f60ebe14 1123 highbit = 1 << 24;
3c3bdf30
NC		 1124 value += (1 << (howto->bitsize - 1));
1125 }
1126 else
1127 highbit = 0;
1128
1129 value >>= 2;
1130
1131 bfd_put_32 (abfd,
930b4cb2 1132 (in1 & howto->src_mask)
3c3bdf30
NC		 1133 | highbit
1134 | (value & howto->dst_mask),
1135 (bfd_byte *) datap);
1136
1137 return bfd_reloc_ok;
1138 }
1139 else
1140 return bfd_reloc_overflow;
1141
930b4cb2
HPN		 1142 case R_MMIX_BASE_PLUS_OFFSET:
1143 {
1144 struct bpo_reloc_section_info *bpodata
f0abc2a1 1145 = mmix_elf_section_data (isec)->bpo.reloc;
930b4cb2
HPN		 1146 asection *bpo_greg_section
1147 = bpodata->bpo_greg_section;
1148 struct bpo_greg_section_info *gregdata
f0abc2a1 1149 = mmix_elf_section_data (bpo_greg_section)->bpo.greg;
930b4cb2
HPN		 1150 size_t bpo_index
1151 = gregdata->bpo_reloc_indexes[bpodata->bpo_index++];
1152
1153 /* A consistency check: The value we now have in "relocation" must
1154 be the same as the value we stored for that relocation. It
1155 doesn't cost much, so can be left in at all times. */
1156 if (value != gregdata->reloc_request[bpo_index].value)
1157 {
1158 (*_bfd_error_handler)
1159 (_("%s: Internal inconsistency error for value for\n\
1160 linker-allocated global register: linked: 0x%lx%08lx != relaxed: 0x%lx%08lx\n"),
1161 bfd_get_filename (isec->owner),
1162 (unsigned long) (value >> 32), (unsigned long) value,
1163 (unsigned long) (gregdata->reloc_request[bpo_index].value
1164 >> 32),
1165 (unsigned long) gregdata->reloc_request[bpo_index].value);
1166 bfd_set_error (bfd_error_bad_value);
1167 return bfd_reloc_overflow;
1168 }
1169
1170 /* Then store the register number and offset for that register
1171 into datap and datap + 1 respectively. */
1172 bfd_put_8 (abfd,
1173 gregdata->reloc_request[bpo_index].regindex
1174 + bpo_greg_section->output_section->vma / 8,
1175 datap);
1176 bfd_put_8 (abfd,
1177 gregdata->reloc_request[bpo_index].offset,
1178 ((unsigned char *) datap) + 1);
1179 return bfd_reloc_ok;
1180 }
1181
3c3bdf30
NC		 1182 case R_MMIX_REG_OR_BYTE:
1183 case R_MMIX_REG:
1184 if (value > 255)
1185 return bfd_reloc_overflow;
1186 bfd_put_8 (abfd, value, datap);
1187 return bfd_reloc_ok;
1188
1189 default:
1190 BAD_CASE (howto->type);
1191 }
1192
1193 /* This code adds the common SETL/INCML/INCMH/INCH worst-case
1194 sequence. */
1195
1196 /* Lowest two bits must be 0. We return bfd_reloc_overflow for
1197 everything that looks strange. */
1198 if (value & 3)
1199 flag = bfd_reloc_overflow;
1200
1201 bfd_put_32 (abfd,
1202 (SETL_INSN_BYTE << 24) | (value & 0xffff) | (reg << 16),
1203 (bfd_byte *) datap + offs);
1204 bfd_put_32 (abfd,
1205 (INCML_INSN_BYTE << 24) | ((value >> 16) & 0xffff) | (reg << 16),
1206 (bfd_byte *) datap + offs + 4);
1207 bfd_put_32 (abfd,
1208 (INCMH_INSN_BYTE << 24) | ((value >> 32) & 0xffff) | (reg << 16),
1209 (bfd_byte *) datap + offs + 8);
1210 bfd_put_32 (abfd,
1211 (INCH_INSN_BYTE << 24) | ((value >> 48) & 0xffff) | (reg << 16),
1212 (bfd_byte *) datap + offs + 12);
1213
1214 return flag;
1215}
1216
1217/* Set the howto pointer for an MMIX ELF reloc (type RELA). */
1218
1219static void
1220mmix_info_to_howto_rela (abfd, cache_ptr, dst)
1221 bfd *abfd ATTRIBUTE_UNUSED;
1222 arelent *cache_ptr;
947216bf 1223 Elf_Internal_Rela *dst;
3c3bdf30
NC		 1224{
1225 unsigned int r_type;
1226
1227 r_type = ELF64_R_TYPE (dst->r_info);
1228 BFD_ASSERT (r_type < (unsigned int) R_MMIX_max);
1229 cache_ptr->howto = &elf_mmix_howto_table[r_type];
1230}
1231
1232/* Any MMIX-specific relocation gets here at assembly time or when linking
1233 to other formats (such as mmo); this is the relocation function from
1234 the reloc_table. We don't get here for final pure ELF linking. */
1235
1236static bfd_reloc_status_type
1237mmix_elf_reloc (abfd, reloc_entry, symbol, data, input_section,
1238 output_bfd, error_message)
1239 bfd *abfd;
1240 arelent *reloc_entry;
1241 asymbol *symbol;
1242 PTR data;
1243 asection *input_section;
1244 bfd *output_bfd;
1245 char **error_message ATTRIBUTE_UNUSED;
1246{
1247 bfd_vma relocation;
1248 bfd_reloc_status_type r;
1249 asection *reloc_target_output_section;
1250 bfd_reloc_status_type flag = bfd_reloc_ok;
1251 bfd_vma output_base = 0;
1252 bfd_vma addr;
1253
1254 r = bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1255 input_section, output_bfd, error_message);
1256
1257 /* If that was all that was needed (i.e. this isn't a final link, only
1258 some segment adjustments), we're done. */
1259 if (r != bfd_reloc_continue)
1260 return r;
1261
1262 if (bfd_is_und_section (symbol->section)
1263 && (symbol->flags & BSF_WEAK) == 0
1264 && output_bfd == (bfd *) NULL)
1265 return bfd_reloc_undefined;
1266
1267 /* Is the address of the relocation really within the section? */
07515404 1268 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
3c3bdf30
NC		 1269 return bfd_reloc_outofrange;
1270
4cc11e76 1271 /* Work out which section the relocation is targeted at and the
3c3bdf30
NC		 1272 initial relocation command value. */
1273
1274 /* Get symbol value. (Common symbols are special.) */
1275 if (bfd_is_com_section (symbol->section))
1276 relocation = 0;
1277 else
1278 relocation = symbol->value;
1279
1280 reloc_target_output_section = bfd_get_output_section (symbol);
1281
1282 /* Here the variable relocation holds the final address of the symbol we
1283 are relocating against, plus any addend. */
1284 if (output_bfd)
1285 output_base = 0;
1286 else
1287 output_base = reloc_target_output_section->vma;
1288
1289 relocation += output_base + symbol->section->output_offset;
1290
1291 /* Get position of relocation. */
1292 addr = (reloc_entry->address + input_section->output_section->vma
1293 + input_section->output_offset);
1294 if (output_bfd != (bfd *) NULL)
1295 {
1296 /* Add in supplied addend. */
1297 relocation += reloc_entry->addend;
1298
1299 /* This is a partial relocation, and we want to apply the
1300 relocation to the reloc entry rather than the raw data.
1301 Modify the reloc inplace to reflect what we now know. */
1302 reloc_entry->addend = relocation;
1303 reloc_entry->address += input_section->output_offset;
1304 return flag;
1305 }
1306
1307 return mmix_final_link_relocate (reloc_entry->howto, input_section,
1308 data, reloc_entry->address,
1309 reloc_entry->addend, relocation,
1310 bfd_asymbol_name (symbol),
1311 reloc_target_output_section);
1312}
e06fcc86 1313\f
3c3bdf30
NC		 1314/* Relocate an MMIX ELF section. Modified from elf32-fr30.c; look to it
1315 for guidance if you're thinking of copying this. */
1316
b34976b6 1317static bfd_boolean
3c3bdf30
NC		 1318mmix_elf_relocate_section (output_bfd, info, input_bfd, input_section,
1319 contents, relocs, local_syms, local_sections)
1320 bfd *output_bfd ATTRIBUTE_UNUSED;
1321 struct bfd_link_info *info;
1322 bfd *input_bfd;
1323 asection *input_section;
1324 bfd_byte *contents;
1325 Elf_Internal_Rela *relocs;
1326 Elf_Internal_Sym *local_syms;
1327 asection **local_sections;
1328{
1329 Elf_Internal_Shdr *symtab_hdr;
1330 struct elf_link_hash_entry **sym_hashes;
1331 Elf_Internal_Rela *rel;
1332 Elf_Internal_Rela *relend;
1a23a9e6 1333 bfd_size_type size;
f60ebe14 1334 size_t pjsno = 0;
3c3bdf30 1335
1a23a9e6 1336 size = input_section->rawsize ? input_section->rawsize : input_section->size;
3c3bdf30
NC		 1337 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1338 sym_hashes = elf_sym_hashes (input_bfd);
1339 relend = relocs + input_section->reloc_count;
1340
1a23a9e6
AM		 1341 /* Zero the stub area before we start. */
1342 if (input_section->rawsize != 0
1343 && input_section->size > input_section->rawsize)
1344 memset (contents + input_section->rawsize, 0,
1345 input_section->size - input_section->rawsize);
1346
3c3bdf30
NC		 1347 for (rel = relocs; rel < relend; rel ++)
1348 {
1349 reloc_howto_type *howto;
1350 unsigned long r_symndx;
1351 Elf_Internal_Sym *sym;
1352 asection *sec;
1353 struct elf_link_hash_entry *h;
1354 bfd_vma relocation;
1355 bfd_reloc_status_type r;
1356 const char *name = NULL;
1357 int r_type;
b34976b6 1358 bfd_boolean undefined_signalled = FALSE;
3c3bdf30
NC		 1359
1360 r_type = ELF64_R_TYPE (rel->r_info);
1361
1362 if (r_type == R_MMIX_GNU_VTINHERIT
1363 || r_type == R_MMIX_GNU_VTENTRY)
1364 continue;
1365
1366 r_symndx = ELF64_R_SYM (rel->r_info);
1367
1049f94e 1368 if (info->relocatable)
3c3bdf30 1369 {
f60ebe14
HPN		 1370 /* This is a relocatable link. For most relocs we don't have to
1371 change anything, unless the reloc is against a section
1372 symbol, in which case we have to adjust according to where
1373 the section symbol winds up in the output section. */
3c3bdf30
NC		 1374 if (r_symndx < symtab_hdr->sh_info)
1375 {
1376 sym = local_syms + r_symndx;
1377
1378 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
1379 {
1380 sec = local_sections [r_symndx];
1381 rel->r_addend += sec->output_offset + sym->st_value;
1382 }
1383 }
1384
f60ebe14
HPN		 1385 /* For PUSHJ stub relocs however, we may need to change the
1386 reloc and the section contents, if the reloc doesn't reach
1387 beyond the end of the output section and previous stubs.
1388 Then we change the section contents to be a PUSHJ to the end
1389 of the input section plus stubs (we can do that without using
1390 a reloc), and then we change the reloc to be a R_MMIX_PUSHJ
1391 at the stub location. */
1392 if (r_type == R_MMIX_PUSHJ_STUBBABLE)
1393 {
1394 /* We've already checked whether we need a stub; use that
1395 knowledge. */
1396 if (mmix_elf_section_data (input_section)->pjs.stub_size[pjsno]
1397 != 0)
1398 {
1399 Elf_Internal_Rela relcpy;
1400
1401 if (mmix_elf_section_data (input_section)
1402 ->pjs.stub_size[pjsno] != MAX_PUSHJ_STUB_SIZE)
1403 abort ();
1404
1405 /* There's already a PUSHJ insn there, so just fill in
1406 the offset bits to the stub. */
1407 if (mmix_final_link_relocate (elf_mmix_howto_table
1408 + R_MMIX_ADDR19,
1409 input_section,
1410 contents,
1411 rel->r_offset,
1412 0,
1413 input_section
1414 ->output_section->vma
1415 + input_section->output_offset
eea6121a 1416 + size
f60ebe14
HPN		 1417 + mmix_elf_section_data (input_section)
1418 ->pjs.stub_offset,
1419 NULL, NULL) != bfd_reloc_ok)
1420 return FALSE;
1421
1422 /* Put a JMP insn at the stub; it goes with the
1423 R_MMIX_JMP reloc. */
1424 bfd_put_32 (output_bfd, JMP_INSN_BYTE << 24,
1425 contents
eea6121a 1426 + size
f60ebe14
HPN		 1427 + mmix_elf_section_data (input_section)
1428 ->pjs.stub_offset);
1429
1430 /* Change the reloc to be at the stub, and to a full
1431 R_MMIX_JMP reloc. */
1432 rel->r_info = ELF64_R_INFO (r_symndx, R_MMIX_JMP);
1433 rel->r_offset
eea6121a 1434 = (size
f60ebe14
HPN		 1435 + mmix_elf_section_data (input_section)
1436 ->pjs.stub_offset);
1437
1438 mmix_elf_section_data (input_section)->pjs.stub_offset
1439 += MAX_PUSHJ_STUB_SIZE;
1440
1441 /* Shift this reloc to the end of the relocs to maintain
1442 the r_offset sorted reloc order. */
1443 relcpy = *rel;
1444 memmove (rel, rel + 1, (char *) relend - (char *) rel);
1445 relend[-1] = relcpy;
1446
1447 /* Back up one reloc, or else we'd skip the next reloc
1448 in turn. */
1449 rel--;
1450 }
1451
1452 pjsno++;
1453 }
3c3bdf30
NC		 1454 continue;
1455 }
1456
1457 /* This is a final link. */
1458 howto = elf_mmix_howto_table + ELF64_R_TYPE (rel->r_info);
1459 h = NULL;
1460 sym = NULL;
1461 sec = NULL;
1462
1463 if (r_symndx < symtab_hdr->sh_info)
1464 {
1465 sym = local_syms + r_symndx;
1466 sec = local_sections [r_symndx];
8517fae7 1467 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
3c3bdf30 1468
6a9cae7f
AM		 1469 name = bfd_elf_string_from_elf_section (input_bfd,
1470 symtab_hdr->sh_link,
1471 sym->st_name);
1472 if (name == NULL)
1473 name = bfd_section_name (input_bfd, sec);
3c3bdf30
NC		 1474 }
1475 else
1476 {
59c2e50f 1477 bfd_boolean unresolved_reloc;
3c3bdf30 1478
b2a8e766
AM		 1479 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1480 r_symndx, symtab_hdr, sym_hashes,
1481 h, sec, relocation,
1482 unresolved_reloc, undefined_signalled);
6a9cae7f 1483 name = h->root.root.string;
3c3bdf30
NC		 1484 }
1485
1486 r = mmix_final_link_relocate (howto, input_section,
1487 contents, rel->r_offset,
1488 rel->r_addend, relocation, name, sec);
1489
1490 if (r != bfd_reloc_ok)
1491 {
b34976b6 1492 bfd_boolean check_ok = TRUE;
3c3bdf30
NC		 1493 const char * msg = (const char *) NULL;
1494
1495 switch (r)
1496 {
1497 case bfd_reloc_overflow:
1498 check_ok = info->callbacks->reloc_overflow
dfeffb9f
L		 1499 (info, (h ? &h->root : NULL), name, howto->name,
1500 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3c3bdf30
NC		 1501 break;
1502
1503 case bfd_reloc_undefined:
1504 /* We may have sent this message above. */
1505 if (! undefined_signalled)
1506 check_ok = info->callbacks->undefined_symbol
1507 (info, name, input_bfd, input_section, rel->r_offset,
b34976b6
AM		 1508 TRUE);
1509 undefined_signalled = TRUE;
3c3bdf30
NC		 1510 break;
1511
1512 case bfd_reloc_outofrange:
1513 msg = _("internal error: out of range error");
1514 break;
1515
1516 case bfd_reloc_notsupported:
1517 msg = _("internal error: unsupported relocation error");
1518 break;
1519
1520 case bfd_reloc_dangerous:
1521 msg = _("internal error: dangerous relocation");
1522 break;
1523
1524 default:
1525 msg = _("internal error: unknown error");
1526 break;
1527 }
1528
1529 if (msg)
1530 check_ok = info->callbacks->warning
1531 (info, msg, name, input_bfd, input_section, rel->r_offset);
1532
1533 if (! check_ok)
b34976b6 1534 return FALSE;
3c3bdf30
NC		 1535 }
1536 }
1537
b34976b6 1538 return TRUE;
3c3bdf30 1539}
e06fcc86 1540\f
3c3bdf30
NC		 1541/* Perform a single relocation. By default we use the standard BFD
1542 routines. A few relocs we have to do ourselves. */
1543
1544static bfd_reloc_status_type
1545mmix_final_link_relocate (howto, input_section, contents,
1546 r_offset, r_addend, relocation, symname, symsec)
1547 reloc_howto_type *howto;
1548 asection *input_section;
1549 bfd_byte *contents;
1550 bfd_vma r_offset;
1551 bfd_signed_vma r_addend;
1552 bfd_vma relocation;
1553 const char *symname;
1554 asection *symsec;
1555{
1556 bfd_reloc_status_type r = bfd_reloc_ok;
1557 bfd_vma addr
1558 = (input_section->output_section->vma
1559 + input_section->output_offset
1560 + r_offset);
1561 bfd_signed_vma srel
1562 = (bfd_signed_vma) relocation + r_addend;
1563
1564 switch (howto->type)
1565 {
1566 /* All these are PC-relative. */
f60ebe14 1567 case R_MMIX_PUSHJ_STUBBABLE:
3c3bdf30
NC		 1568 case R_MMIX_PUSHJ:
1569 case R_MMIX_CBRANCH:
1570 case R_MMIX_ADDR19:
1571 case R_MMIX_GETA:
1572 case R_MMIX_ADDR27:
1573 case R_MMIX_JMP:
1574 contents += r_offset;
1575
1576 srel -= (input_section->output_section->vma
1577 + input_section->output_offset
1578 + r_offset);
1579
1580 r = mmix_elf_perform_relocation (input_section, howto, contents,
1581 addr, srel);
1582 break;
1583
930b4cb2
HPN		 1584 case R_MMIX_BASE_PLUS_OFFSET:
1585 if (symsec == NULL)
1586 return bfd_reloc_undefined;
1587
1588 /* Check that we're not relocating against a register symbol. */
1589 if (strcmp (bfd_get_section_name (symsec->owner, symsec),
1590 MMIX_REG_CONTENTS_SECTION_NAME) == 0
1591 || strcmp (bfd_get_section_name (symsec->owner, symsec),
1592 MMIX_REG_SECTION_NAME) == 0)
1593 {
1594 /* Note: This is separated out into two messages in order
1595 to ease the translation into other languages. */
1596 if (symname == NULL || *symname == 0)
1597 (*_bfd_error_handler)
1598 (_("%s: base-plus-offset relocation against register symbol: (unknown) in %s"),
1599 bfd_get_filename (input_section->owner),
1600 bfd_get_section_name (symsec->owner, symsec));
1601 else
1602 (*_bfd_error_handler)
1603 (_("%s: base-plus-offset relocation against register symbol: %s in %s"),
1604 bfd_get_filename (input_section->owner), symname,
1605 bfd_get_section_name (symsec->owner, symsec));
1606 return bfd_reloc_overflow;
1607 }
1608 goto do_mmix_reloc;
1609
3c3bdf30
NC		 1610 case R_MMIX_REG_OR_BYTE:
1611 case R_MMIX_REG:
1612 /* For now, we handle these alike. They must refer to an register
1613 symbol, which is either relative to the register section and in
1614 the range 0..255, or is in the register contents section with vma
1615 regno * 8. */
1616
1617 /* FIXME: A better way to check for reg contents section?
1618 FIXME: Postpone section->scaling to mmix_elf_perform_relocation? */
1619 if (symsec == NULL)
1620 return bfd_reloc_undefined;
1621
1622 if (strcmp (bfd_get_section_name (symsec->owner, symsec),
1623 MMIX_REG_CONTENTS_SECTION_NAME) == 0)
1624 {
1625 if ((srel & 7) != 0 || srel < 32*8 || srel > 255*8)
1626 {
1627 /* The bfd_reloc_outofrange return value, though intuitively
1628 a better value, will not get us an error. */
1629 return bfd_reloc_overflow;
1630 }
1631 srel /= 8;
1632 }
1633 else if (strcmp (bfd_get_section_name (symsec->owner, symsec),
1634 MMIX_REG_SECTION_NAME) == 0)
1635 {
1636 if (srel < 0 || srel > 255)
1637 /* The bfd_reloc_outofrange return value, though intuitively a
1638 better value, will not get us an error. */
1639 return bfd_reloc_overflow;
1640 }
1641 else
1642 {
930b4cb2 1643 /* Note: This is separated out into two messages in order
ca09e32b
NC		 1644 to ease the translation into other languages. */
1645 if (symname == NULL || *symname == 0)
1646 (*_bfd_error_handler)
1647 (_("%s: register relocation against non-register symbol: (unknown) in %s"),
1648 bfd_get_filename (input_section->owner),
1649 bfd_get_section_name (symsec->owner, symsec));
1650 else
1651 (*_bfd_error_handler)
1652 (_("%s: register relocation against non-register symbol: %s in %s"),
1653 bfd_get_filename (input_section->owner), symname,
1654 bfd_get_section_name (symsec->owner, symsec));
3c3bdf30
NC		 1655
1656 /* The bfd_reloc_outofrange return value, though intuitively a
1657 better value, will not get us an error. */
1658 return bfd_reloc_overflow;
1659 }
930b4cb2 1660 do_mmix_reloc:
3c3bdf30
NC		 1661 contents += r_offset;
1662 r = mmix_elf_perform_relocation (input_section, howto, contents,
1663 addr, srel);
1664 break;
1665
1666 case R_MMIX_LOCAL:
1667 /* This isn't a real relocation, it's just an assertion that the
1668 final relocation value corresponds to a local register. We
1669 ignore the actual relocation; nothing is changed. */
1670 {
1671 asection *regsec
1672 = bfd_get_section_by_name (input_section->output_section->owner,
1673 MMIX_REG_CONTENTS_SECTION_NAME);
1674 bfd_vma first_global;
1675
1676 /* Check that this is an absolute value, or a reference to the
1677 register contents section or the register (symbol) section.
1678 Absolute numbers can get here as undefined section. Undefined
1679 symbols are signalled elsewhere, so there's no conflict in us
1680 accidentally handling it. */
1681 if (!bfd_is_abs_section (symsec)
1682 && !bfd_is_und_section (symsec)
1683 && strcmp (bfd_get_section_name (symsec->owner, symsec),
1684 MMIX_REG_CONTENTS_SECTION_NAME) != 0
1685 && strcmp (bfd_get_section_name (symsec->owner, symsec),
1686 MMIX_REG_SECTION_NAME) != 0)
1687 {
1688 (*_bfd_error_handler)
1689 (_("%s: directive LOCAL valid only with a register or absolute value"),
1690 bfd_get_filename (input_section->owner));
1691
1692 return bfd_reloc_overflow;
1693 }
1694
1695 /* If we don't have a register contents section, then $255 is the
1696 first global register. */
1697 if (regsec == NULL)
1698 first_global = 255;
1699 else
1700 {
1701 first_global = bfd_get_section_vma (abfd, regsec) / 8;
1702 if (strcmp (bfd_get_section_name (symsec->owner, symsec),
1703 MMIX_REG_CONTENTS_SECTION_NAME) == 0)
1704 {
1705 if ((srel & 7) != 0 || srel < 32*8 || srel > 255*8)
1706 /* The bfd_reloc_outofrange return value, though
1707 intuitively a better value, will not get us an error. */
1708 return bfd_reloc_overflow;
1709 srel /= 8;
1710 }
1711 }
1712
1713 if ((bfd_vma) srel >= first_global)
1714 {
1715 /* FIXME: Better error message. */
1716 (*_bfd_error_handler)
1717 (_("%s: LOCAL directive: Register $%ld is not a local register. First global register is $%ld."),
1718 bfd_get_filename (input_section->owner), (long) srel, (long) first_global);
1719
1720 return bfd_reloc_overflow;
1721 }
1722 }
1723 r = bfd_reloc_ok;
1724 break;
1725
1726 default:
1727 r = _bfd_final_link_relocate (howto, input_section->owner, input_section,
1728 contents, r_offset,
1729 relocation, r_addend);
1730 }
1731
1732 return r;
1733}
e06fcc86 1734\f
3c3bdf30
NC		 1735/* Return the section that should be marked against GC for a given
1736 relocation. */
1737
1738static asection *
07adf181
AM		 1739mmix_elf_gc_mark_hook (asection *sec,
1740 struct bfd_link_info *info,
1741 Elf_Internal_Rela *rel,
1742 struct elf_link_hash_entry *h,
1743 Elf_Internal_Sym *sym)
3c3bdf30
NC		 1744{
1745 if (h != NULL)
07adf181
AM		 1746 switch (ELF64_R_TYPE (rel->r_info))
1747 {
1748 case R_MMIX_GNU_VTINHERIT:
1749 case R_MMIX_GNU_VTENTRY:
1750 return NULL;
1751 }
3c3bdf30 1752
07adf181 1753 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
3c3bdf30 1754}
930b4cb2
HPN		 1755
1756/* Update relocation info for a GC-excluded section. We could supposedly
1757 perform the allocation after GC, but there's no suitable hook between
1758 GC (or section merge) and the point when all input sections must be
1759 present. Better to waste some memory and (perhaps) a little time. */
1760
b34976b6 1761static bfd_boolean
07adf181
AM		 1762mmix_elf_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED,
1763 struct bfd_link_info *info ATTRIBUTE_UNUSED,
1764 asection *sec,
1765 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED)
930b4cb2
HPN		 1766{
1767 struct bpo_reloc_section_info *bpodata
f0abc2a1 1768 = mmix_elf_section_data (sec)->bpo.reloc;
930b4cb2
HPN		 1769 asection *allocated_gregs_section;
1770
1771 /* If no bpodata here, we have nothing to do. */
1772 if (bpodata == NULL)
b34976b6 1773 return TRUE;
930b4cb2
HPN		 1774
1775 allocated_gregs_section = bpodata->bpo_greg_section;
1776
f0abc2a1 1777 mmix_elf_section_data (allocated_gregs_section)->bpo.greg->n_bpo_relocs
930b4cb2
HPN		 1778 -= bpodata->n_bpo_relocs_this_section;
1779
b34976b6 1780 return TRUE;
930b4cb2 1781}
e06fcc86 1782\f
3c3bdf30
NC		 1783/* Sort register relocs to come before expanding relocs. */
1784
1785static int
1786mmix_elf_sort_relocs (p1, p2)
1787 const PTR p1;
1788 const PTR p2;
1789{
1790 const Elf_Internal_Rela *r1 = (const Elf_Internal_Rela *) p1;
1791 const Elf_Internal_Rela *r2 = (const Elf_Internal_Rela *) p2;
1792 int r1_is_reg, r2_is_reg;
1793
1794 /* Sort primarily on r_offset & ~3, so relocs are done to consecutive
1795 insns. */
1796 if ((r1->r_offset & ~(bfd_vma) 3) > (r2->r_offset & ~(bfd_vma) 3))
1797 return 1;
1798 else if ((r1->r_offset & ~(bfd_vma) 3) < (r2->r_offset & ~(bfd_vma) 3))
1799 return -1;
1800
1801 r1_is_reg
1802 = (ELF64_R_TYPE (r1->r_info) == R_MMIX_REG_OR_BYTE
1803 || ELF64_R_TYPE (r1->r_info) == R_MMIX_REG);
1804 r2_is_reg
1805 = (ELF64_R_TYPE (r2->r_info) == R_MMIX_REG_OR_BYTE
1806 || ELF64_R_TYPE (r2->r_info) == R_MMIX_REG);
1807 if (r1_is_reg != r2_is_reg)
1808 return r2_is_reg - r1_is_reg;
1809
1810 /* Neither or both are register relocs. Then sort on full offset. */
1811 if (r1->r_offset > r2->r_offset)
1812 return 1;
1813 else if (r1->r_offset < r2->r_offset)
1814 return -1;
1815 return 0;
1816}
1817
930b4cb2
HPN		 1818/* Subset of mmix_elf_check_relocs, common to ELF and mmo linking. */
1819
b34976b6 1820static bfd_boolean
930b4cb2
HPN		 1821mmix_elf_check_common_relocs (abfd, info, sec, relocs)
1822 bfd *abfd;
1823 struct bfd_link_info *info;
1824 asection *sec;
1825 const Elf_Internal_Rela *relocs;
1826{
1827 bfd *bpo_greg_owner = NULL;
1828 asection *allocated_gregs_section = NULL;
1829 struct bpo_greg_section_info *gregdata = NULL;
1830 struct bpo_reloc_section_info *bpodata = NULL;
1831 const Elf_Internal_Rela *rel;
1832 const Elf_Internal_Rela *rel_end;
1833
930b4cb2
HPN		 1834 /* We currently have to abuse this COFF-specific member, since there's
1835 no target-machine-dedicated member. There's no alternative outside
1836 the bfd_link_info struct; we can't specialize a hash-table since
1837 they're different between ELF and mmo. */
1838 bpo_greg_owner = (bfd *) info->base_file;
1839
1840 rel_end = relocs + sec->reloc_count;
1841 for (rel = relocs; rel < rel_end; rel++)
1842 {
1843 switch (ELF64_R_TYPE (rel->r_info))
1844 {
1845 /* This relocation causes a GREG allocation. We need to count
1846 them, and we need to create a section for them, so we need an
1847 object to fake as the owner of that section. We can't use
1848 the ELF dynobj for this, since the ELF bits assume lots of
1849 DSO-related stuff if that member is non-NULL. */
1850 case R_MMIX_BASE_PLUS_OFFSET:
f60ebe14
HPN		 1851 /* We don't do anything with this reloc for a relocatable link. */
1852 if (info->relocatable)
1853 break;
1854
930b4cb2
HPN		 1855 if (bpo_greg_owner == NULL)
1856 {
1857 bpo_greg_owner = abfd;
1858 info->base_file = (PTR) bpo_greg_owner;
1859 }
1860
4fa5c2a8
HPN		 1861 if (allocated_gregs_section == NULL)
1862 allocated_gregs_section
1863 = bfd_get_section_by_name (bpo_greg_owner,
1864 MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME);
1865
930b4cb2
HPN		 1866 if (allocated_gregs_section == NULL)
1867 {
1868 allocated_gregs_section
3496cb2a
L		 1869 = bfd_make_section_with_flags (bpo_greg_owner,
1870 MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME,
1871 (SEC_HAS_CONTENTS
1872 | SEC_IN_MEMORY
1873 | SEC_LINKER_CREATED));
930b4cb2
HPN		 1874 /* Setting both SEC_ALLOC and SEC_LOAD means the section is
1875 treated like any other section, and we'd get errors for
1876 address overlap with the text section. Let's set none of
1877 those flags, as that is what currently happens for usual
1878 GREG allocations, and that works. */
1879 if (allocated_gregs_section == NULL
930b4cb2
HPN		 1880 || !bfd_set_section_alignment (bpo_greg_owner,
1881 allocated_gregs_section,
1882 3))
b34976b6 1883 return FALSE;
930b4cb2
HPN		 1884
1885 gregdata = (struct bpo_greg_section_info *)
1886 bfd_zalloc (bpo_greg_owner, sizeof (struct bpo_greg_section_info));
1887 if (gregdata == NULL)
b34976b6 1888 return FALSE;
f0abc2a1
AM		 1889 mmix_elf_section_data (allocated_gregs_section)->bpo.greg
1890 = gregdata;
930b4cb2
HPN		 1891 }
1892 else if (gregdata == NULL)
f0abc2a1
AM		 1893 gregdata
1894 = mmix_elf_section_data (allocated_gregs_section)->bpo.greg;
930b4cb2
HPN		 1895
1896 /* Get ourselves some auxiliary info for the BPO-relocs. */
1897 if (bpodata == NULL)
1898 {
1899 /* No use doing a separate iteration pass to find the upper
1900 limit - just use the number of relocs. */
1901 bpodata = (struct bpo_reloc_section_info *)
1902 bfd_alloc (bpo_greg_owner,
1903 sizeof (struct bpo_reloc_section_info)
1904 * (sec->reloc_count + 1));
1905 if (bpodata == NULL)
b34976b6 1906 return FALSE;
f0abc2a1 1907 mmix_elf_section_data (sec)->bpo.reloc = bpodata;
930b4cb2
HPN		 1908 bpodata->first_base_plus_offset_reloc
1909 = bpodata->bpo_index
1910 = gregdata->n_max_bpo_relocs;
1911 bpodata->bpo_greg_section
1912 = allocated_gregs_section;
4fa5c2a8 1913 bpodata->n_bpo_relocs_this_section = 0;
930b4cb2
HPN		 1914 }
1915
1916 bpodata->n_bpo_relocs_this_section++;
1917 gregdata->n_max_bpo_relocs++;
1918
1919 /* We don't get another chance to set this before GC; we've not
f60ebe14 1920 set up any hook that runs before GC. */
930b4cb2
HPN		 1921 gregdata->n_bpo_relocs
1922 = gregdata->n_max_bpo_relocs;
1923 break;
f60ebe14
HPN		 1924
1925 case R_MMIX_PUSHJ_STUBBABLE:
1926 mmix_elf_section_data (sec)->pjs.n_pushj_relocs++;
1927 break;
930b4cb2
HPN		 1928 }
1929 }
1930
f60ebe14
HPN		 1931 /* Allocate per-reloc stub storage and initialize it to the max stub
1932 size. */
1933 if (mmix_elf_section_data (sec)->pjs.n_pushj_relocs != 0)
1934 {
1935 size_t i;
1936
1937 mmix_elf_section_data (sec)->pjs.stub_size
1938 = bfd_alloc (abfd, mmix_elf_section_data (sec)->pjs.n_pushj_relocs
1939 * sizeof (mmix_elf_section_data (sec)
1940 ->pjs.stub_size[0]));
1941 if (mmix_elf_section_data (sec)->pjs.stub_size == NULL)
1942 return FALSE;
1943
1944 for (i = 0; i < mmix_elf_section_data (sec)->pjs.n_pushj_relocs; i++)
1945 mmix_elf_section_data (sec)->pjs.stub_size[i] = MAX_PUSHJ_STUB_SIZE;
1946 }
1947
b34976b6 1948 return TRUE;
930b4cb2
HPN		 1949}
1950
3c3bdf30
NC		 1951/* Look through the relocs for a section during the first phase. */
1952
b34976b6 1953static bfd_boolean
3c3bdf30
NC		 1954mmix_elf_check_relocs (abfd, info, sec, relocs)
1955 bfd *abfd;
1956 struct bfd_link_info *info;
1957 asection *sec;
1958 const Elf_Internal_Rela *relocs;
1959{
1960 Elf_Internal_Shdr *symtab_hdr;
1961 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
1962 const Elf_Internal_Rela *rel;
1963 const Elf_Internal_Rela *rel_end;
1964
3c3bdf30
NC		 1965 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1966 sym_hashes = elf_sym_hashes (abfd);
1967 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf64_External_Sym);
1968 if (!elf_bad_symtab (abfd))
1969 sym_hashes_end -= symtab_hdr->sh_info;
1970
1971 /* First we sort the relocs so that any register relocs come before
1972 expansion-relocs to the same insn. FIXME: Not done for mmo. */
1973 qsort ((PTR) relocs, sec->reloc_count, sizeof (Elf_Internal_Rela),
1974 mmix_elf_sort_relocs);
1975
930b4cb2
HPN		 1976 /* Do the common part. */
1977 if (!mmix_elf_check_common_relocs (abfd, info, sec, relocs))
b34976b6 1978 return FALSE;
930b4cb2 1979
f60ebe14
HPN		 1980 if (info->relocatable)
1981 return TRUE;
1982
3c3bdf30
NC		 1983 rel_end = relocs + sec->reloc_count;
1984 for (rel = relocs; rel < rel_end; rel++)
1985 {
1986 struct elf_link_hash_entry *h;
1987 unsigned long r_symndx;
1988
1989 r_symndx = ELF64_R_SYM (rel->r_info);
1990 if (r_symndx < symtab_hdr->sh_info)
1991 h = NULL;
1992 else
973a3492
L		 1993 {
1994 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1995 while (h->root.type == bfd_link_hash_indirect
1996 || h->root.type == bfd_link_hash_warning)
1997 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1998 }
3c3bdf30
NC		 1999
2000 switch (ELF64_R_TYPE (rel->r_info))
930b4cb2 2001 {
3c3bdf30
NC		 2002 /* This relocation describes the C++ object vtable hierarchy.
2003 Reconstruct it for later use during GC. */
2004 case R_MMIX_GNU_VTINHERIT:
c152c796 2005 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
b34976b6 2006 return FALSE;
3c3bdf30
NC		 2007 break;
2008
2009 /* This relocation describes which C++ vtable entries are actually
2010 used. Record for later use during GC. */
2011 case R_MMIX_GNU_VTENTRY:
c152c796 2012 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
b34976b6 2013 return FALSE;
3c3bdf30 2014 break;
930b4cb2
HPN		 2015 }
2016 }
2017
b34976b6 2018 return TRUE;
930b4cb2
HPN		 2019}
2020
2021/* Wrapper for mmix_elf_check_common_relocs, called when linking to mmo.
2022 Copied from elf_link_add_object_symbols. */
2023
b34976b6 2024bfd_boolean
930b4cb2
HPN		 2025_bfd_mmix_check_all_relocs (abfd, info)
2026 bfd *abfd;
2027 struct bfd_link_info *info;
2028{
2029 asection *o;
2030
2031 for (o = abfd->sections; o != NULL; o = o->next)
2032 {
2033 Elf_Internal_Rela *internal_relocs;
b34976b6 2034 bfd_boolean ok;
930b4cb2
HPN		 2035
2036 if ((o->flags & SEC_RELOC) == 0
2037 || o->reloc_count == 0
2038 || ((info->strip == strip_all || info->strip == strip_debugger)
2039 && (o->flags & SEC_DEBUGGING) != 0)
2040 || bfd_is_abs_section (o->output_section))
2041 continue;
2042
2043 internal_relocs
45d6a902
AM		 2044 = _bfd_elf_link_read_relocs (abfd, o, (PTR) NULL,
2045 (Elf_Internal_Rela *) NULL,
2046 info->keep_memory);
930b4cb2 2047 if (internal_relocs == NULL)
b34976b6 2048 return FALSE;
930b4cb2
HPN		 2049
2050 ok = mmix_elf_check_common_relocs (abfd, info, o, internal_relocs);
2051
2052 if (! info->keep_memory)
2053 free (internal_relocs);
2054
2055 if (! ok)
b34976b6 2056 return FALSE;
3c3bdf30
NC		 2057 }
2058
b34976b6 2059 return TRUE;
3c3bdf30 2060}
e06fcc86 2061\f
3c3bdf30
NC		 2062/* Change symbols relative to the reg contents section to instead be to
2063 the register section, and scale them down to correspond to the register
2064 number. */
2065
b34976b6 2066static bfd_boolean
754021d0 2067mmix_elf_link_output_symbol_hook (info, name, sym, input_sec, h)
3c3bdf30
NC		 2068 struct bfd_link_info *info ATTRIBUTE_UNUSED;
2069 const char *name ATTRIBUTE_UNUSED;
2070 Elf_Internal_Sym *sym;
2071 asection *input_sec;
754021d0 2072 struct elf_link_hash_entry *h ATTRIBUTE_UNUSED;
3c3bdf30
NC		 2073{
2074 if (input_sec != NULL
2075 && input_sec->name != NULL
2076 && ELF_ST_TYPE (sym->st_info) != STT_SECTION
2077 && strcmp (input_sec->name, MMIX_REG_CONTENTS_SECTION_NAME) == 0)
2078 {
2079 sym->st_value /= 8;
2080 sym->st_shndx = SHN_REGISTER;
2081 }
2082
b34976b6 2083 return TRUE;
3c3bdf30
NC		 2084}
2085
2086/* We fake a register section that holds values that are register numbers.
2087 Having a SHN_REGISTER and register section translates better to other
2088 formats (e.g. mmo) than for example a STT_REGISTER attribute.
2089 This section faking is based on a construct in elf32-mips.c. */
2090static asection mmix_elf_reg_section;
2091static asymbol mmix_elf_reg_section_symbol;
2092static asymbol *mmix_elf_reg_section_symbol_ptr;
2093
f60ebe14 2094/* Handle the special section numbers that a symbol may use. */
3c3bdf30
NC		 2095
2096void
2097mmix_elf_symbol_processing (abfd, asym)
2098 bfd *abfd ATTRIBUTE_UNUSED;
2099 asymbol *asym;
2100{
2101 elf_symbol_type *elfsym;
2102
2103 elfsym = (elf_symbol_type *) asym;
2104 switch (elfsym->internal_elf_sym.st_shndx)
2105 {
2106 case SHN_REGISTER:
2107 if (mmix_elf_reg_section.name == NULL)
2108 {
2109 /* Initialize the register section. */
2110 mmix_elf_reg_section.name = MMIX_REG_SECTION_NAME;
2111 mmix_elf_reg_section.flags = SEC_NO_FLAGS;
2112 mmix_elf_reg_section.output_section = &mmix_elf_reg_section;
2113 mmix_elf_reg_section.symbol = &mmix_elf_reg_section_symbol;
2114 mmix_elf_reg_section.symbol_ptr_ptr = &mmix_elf_reg_section_symbol_ptr;
2115 mmix_elf_reg_section_symbol.name = MMIX_REG_SECTION_NAME;
2116 mmix_elf_reg_section_symbol.flags = BSF_SECTION_SYM;
2117 mmix_elf_reg_section_symbol.section = &mmix_elf_reg_section;
2118 mmix_elf_reg_section_symbol_ptr = &mmix_elf_reg_section_symbol;
2119 }
2120 asym->section = &mmix_elf_reg_section;
2121 break;
2122
2123 default:
2124 break;
2125 }
2126}
2127
2128/* Given a BFD section, try to locate the corresponding ELF section
2129 index. */
2130
b34976b6 2131static bfd_boolean
af746e92 2132mmix_elf_section_from_bfd_section (abfd, sec, retval)
3c3bdf30 2133 bfd * abfd ATTRIBUTE_UNUSED;
3c3bdf30
NC		 2134 asection * sec;
2135 int * retval;
2136{
2137 if (strcmp (bfd_get_section_name (abfd, sec), MMIX_REG_SECTION_NAME) == 0)
2138 *retval = SHN_REGISTER;
2139 else
b34976b6 2140 return FALSE;
3c3bdf30 2141
b34976b6 2142 return TRUE;
3c3bdf30
NC		 2143}
2144
2145/* Hook called by the linker routine which adds symbols from an object
2146 file. We must handle the special SHN_REGISTER section number here.
2147
2148 We also check that we only have *one* each of the section-start
2149 symbols, since otherwise having two with the same value would cause
2150 them to be "merged", but with the contents serialized. */
2151
b34976b6 2152bfd_boolean
3c3bdf30
NC		 2153mmix_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
2154 bfd *abfd;
2155 struct bfd_link_info *info ATTRIBUTE_UNUSED;
555cd476 2156 Elf_Internal_Sym *sym;
3c3bdf30
NC		 2157 const char **namep ATTRIBUTE_UNUSED;
2158 flagword *flagsp ATTRIBUTE_UNUSED;
2159 asection **secp;
2160 bfd_vma *valp ATTRIBUTE_UNUSED;
2161{
2162 if (sym->st_shndx == SHN_REGISTER)
46fda84e
AM		 2163 {
2164 *secp = bfd_make_section_old_way (abfd, MMIX_REG_SECTION_NAME);
2165 (*secp)->flags |= SEC_LINKER_CREATED;
2166 }
3c3bdf30 2167 else if ((*namep)[0] == '_' && (*namep)[1] == '_' && (*namep)[2] == '.'
0112cd26 2168 && CONST_STRNEQ (*namep, MMIX_LOC_SECTION_START_SYMBOL_PREFIX))
3c3bdf30
NC		 2169 {
2170 /* See if we have another one. */
4ab82700
AM		 2171 struct bfd_link_hash_entry *h = bfd_link_hash_lookup (info->hash,
2172 *namep,
b34976b6
AM		 2173 FALSE,
2174 FALSE,
2175 FALSE);
3c3bdf30 2176
4ab82700 2177 if (h != NULL && h->type != bfd_link_hash_undefined)
3c3bdf30
NC		 2178 {
2179 /* How do we get the asymbol (or really: the filename) from h?
4ab82700 2180 h->u.def.section->owner is NULL. */
3c3bdf30
NC		 2181 ((*_bfd_error_handler)
2182 (_("%s: Error: multiple definition of `%s'; start of %s is set in a earlier linked file\n"),
2183 bfd_get_filename (abfd), *namep,
2184 *namep + strlen (MMIX_LOC_SECTION_START_SYMBOL_PREFIX)));
2185 bfd_set_error (bfd_error_bad_value);
b34976b6 2186 return FALSE;
3c3bdf30
NC		 2187 }
2188 }
2189
b34976b6 2190 return TRUE;
3c3bdf30
NC		 2191}
2192
2193/* We consider symbols matching "L.*:[0-9]+" to be local symbols. */
2194
b34976b6 2195bfd_boolean
3c3bdf30
NC		 2196mmix_elf_is_local_label_name (abfd, name)
2197 bfd *abfd;
2198 const char *name;
2199{
2200 const char *colpos;
2201 int digits;
2202
2203 /* Also include the default local-label definition. */
2204 if (_bfd_elf_is_local_label_name (abfd, name))
b34976b6 2205 return TRUE;
3c3bdf30
NC		 2206
2207 if (*name != 'L')
b34976b6 2208 return FALSE;
3c3bdf30
NC		 2209
2210 /* If there's no ":", or more than one, it's not a local symbol. */
2211 colpos = strchr (name, ':');
2212 if (colpos == NULL || strchr (colpos + 1, ':') != NULL)
b34976b6 2213 return FALSE;
3c3bdf30
NC		 2214
2215 /* Check that there are remaining characters and that they are digits. */
2216 if (colpos[1] == 0)
b34976b6 2217 return FALSE;
3c3bdf30
NC		 2218
2219 digits = strspn (colpos + 1, "0123456789");
2220 return digits != 0 && colpos[1 + digits] == 0;
2221}
2222
2223/* We get rid of the register section here. */
2224
b34976b6 2225bfd_boolean
3c3bdf30
NC		 2226mmix_elf_final_link (abfd, info)
2227 bfd *abfd;
2228 struct bfd_link_info *info;
2229{
2230 /* We never output a register section, though we create one for
2231 temporary measures. Check that nobody entered contents into it. */
2232 asection *reg_section;
3c3bdf30
NC		 2233
2234 reg_section = bfd_get_section_by_name (abfd, MMIX_REG_SECTION_NAME);
2235
2236 if (reg_section != NULL)
2237 {
2238 /* FIXME: Pass error state gracefully. */
2239 if (bfd_get_section_flags (abfd, reg_section) & SEC_HAS_CONTENTS)
2240 _bfd_abort (__FILE__, __LINE__, _("Register section has contents\n"));
2241
46fda84e
AM		 2242 /* Really remove the section, if it hasn't already been done. */
2243 if (!bfd_section_removed_from_list (abfd, reg_section))
2244 {
2245 bfd_section_list_remove (abfd, reg_section);
2246 --abfd->section_count;
2247 }
3c3bdf30
NC		 2248 }
2249
c152c796 2250 if (! bfd_elf_final_link (abfd, info))
b34976b6 2251 return FALSE;
3c3bdf30 2252
930b4cb2
HPN		 2253 /* Since this section is marked SEC_LINKER_CREATED, it isn't output by
2254 the regular linker machinery. We do it here, like other targets with
2255 special sections. */
2256 if (info->base_file != NULL)
2257 {
2258 asection *greg_section
2259 = bfd_get_section_by_name ((bfd *) info->base_file,
2260 MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME);
2261 if (!bfd_set_section_contents (abfd,
2262 greg_section->output_section,
2263 greg_section->contents,
2264 (file_ptr) greg_section->output_offset,
eea6121a 2265 greg_section->size))
b34976b6 2266 return FALSE;
930b4cb2 2267 }
b34976b6 2268 return TRUE;
930b4cb2
HPN		 2269}
2270
f60ebe14 2271/* We need to include the maximum size of PUSHJ-stubs in the initial
eea6121a 2272 section size. This is expected to shrink during linker relaxation. */
f60ebe14
HPN		 2273
2274static void
2275mmix_set_relaxable_size (abfd, sec, ptr)
2276 bfd *abfd ATTRIBUTE_UNUSED;
2277 asection *sec;
2278 void *ptr;
2279{
2280 struct bfd_link_info *info = ptr;
2281
2282 /* Make sure we only do this for section where we know we want this,
2283 otherwise we might end up resetting the size of COMMONs. */
2284 if (mmix_elf_section_data (sec)->pjs.n_pushj_relocs == 0)
2285 return;
2286
1a23a9e6 2287 sec->rawsize = sec->size;
eea6121a
AM		 2288 sec->size += (mmix_elf_section_data (sec)->pjs.n_pushj_relocs
2289 * MAX_PUSHJ_STUB_SIZE);
f60ebe14
HPN		 2290
2291 /* For use in relocatable link, we start with a max stubs size. See
2292 mmix_elf_relax_section. */
2293 if (info->relocatable && sec->output_section)
2294 mmix_elf_section_data (sec->output_section)->pjs.stubs_size_sum
2295 += (mmix_elf_section_data (sec)->pjs.n_pushj_relocs
2296 * MAX_PUSHJ_STUB_SIZE);
2297}
2298
930b4cb2
HPN		 2299/* Initialize stuff for the linker-generated GREGs to match
2300 R_MMIX_BASE_PLUS_OFFSET relocs seen by the linker. */
2301
b34976b6 2302bfd_boolean
f60ebe14 2303_bfd_mmix_before_linker_allocation (abfd, info)
930b4cb2
HPN		 2304 bfd *abfd ATTRIBUTE_UNUSED;
2305 struct bfd_link_info *info;
2306{
2307 asection *bpo_gregs_section;
2308 bfd *bpo_greg_owner;
2309 struct bpo_greg_section_info *gregdata;
2310 size_t n_gregs;
2311 bfd_vma gregs_size;
2312 size_t i;
2313 size_t *bpo_reloc_indexes;
f60ebe14
HPN		 2314 bfd *ibfd;
2315
2316 /* Set the initial size of sections. */
2317 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2318 bfd_map_over_sections (ibfd, mmix_set_relaxable_size, info);
930b4cb2
HPN		 2319
2320 /* The bpo_greg_owner bfd is supposed to have been set by
2321 mmix_elf_check_relocs when the first R_MMIX_BASE_PLUS_OFFSET is seen.
2322 If there is no such object, there was no R_MMIX_BASE_PLUS_OFFSET. */
2323 bpo_greg_owner = (bfd *) info->base_file;
2324 if (bpo_greg_owner == NULL)
b34976b6 2325 return TRUE;
930b4cb2
HPN		 2326
2327 bpo_gregs_section
2328 = bfd_get_section_by_name (bpo_greg_owner,
2329 MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME);
2330
930b4cb2 2331 if (bpo_gregs_section == NULL)
b34976b6 2332 return TRUE;
930b4cb2
HPN		 2333
2334 /* We use the target-data handle in the ELF section data. */
f0abc2a1 2335 gregdata = mmix_elf_section_data (bpo_gregs_section)->bpo.greg;
930b4cb2 2336 if (gregdata == NULL)
b34976b6 2337 return FALSE;
930b4cb2
HPN		 2338
2339 n_gregs = gregdata->n_bpo_relocs;
2340 gregdata->n_allocated_bpo_gregs = n_gregs;
2341
2342 /* When this reaches zero during relaxation, all entries have been
2343 filled in and the size of the linker gregs can be calculated. */
2344 gregdata->n_remaining_bpo_relocs_this_relaxation_round = n_gregs;
2345
2346 /* Set the zeroth-order estimate for the GREGs size. */
2347 gregs_size = n_gregs * 8;
2348
2349 if (!bfd_set_section_size (bpo_greg_owner, bpo_gregs_section, gregs_size))
b34976b6 2350 return FALSE;
930b4cb2
HPN		 2351
2352 /* Allocate and set up the GREG arrays. They're filled in at relaxation
2353 time. Note that we must use the max number ever noted for the array,
2354 since the index numbers were created before GC. */
2355 gregdata->reloc_request
2356 = bfd_zalloc (bpo_greg_owner,
2357 sizeof (struct bpo_reloc_request)
2358 * gregdata->n_max_bpo_relocs);
2359
2360 gregdata->bpo_reloc_indexes
2361 = bpo_reloc_indexes
2362 = bfd_alloc (bpo_greg_owner,
2363 gregdata->n_max_bpo_relocs
2364 * sizeof (size_t));
2365 if (bpo_reloc_indexes == NULL)
b34976b6 2366 return FALSE;
930b4cb2
HPN		 2367
2368 /* The default order is an identity mapping. */
2369 for (i = 0; i < gregdata->n_max_bpo_relocs; i++)
2370 {
2371 bpo_reloc_indexes[i] = i;
2372 gregdata->reloc_request[i].bpo_reloc_no = i;
2373 }
2374
b34976b6 2375 return TRUE;
3c3bdf30 2376}
e06fcc86 2377\f
930b4cb2
HPN		 2378/* Fill in contents in the linker allocated gregs. Everything is
2379 calculated at this point; we just move the contents into place here. */
2380
b34976b6 2381bfd_boolean
f60ebe14 2382_bfd_mmix_after_linker_allocation (abfd, link_info)
930b4cb2
HPN		 2383 bfd *abfd ATTRIBUTE_UNUSED;
2384 struct bfd_link_info *link_info;
2385{
2386 asection *bpo_gregs_section;
2387 bfd *bpo_greg_owner;
2388 struct bpo_greg_section_info *gregdata;
2389 size_t n_gregs;
2390 size_t i, j;
2391 size_t lastreg;
2392 bfd_byte *contents;
2393
2394 /* The bpo_greg_owner bfd is supposed to have been set by mmix_elf_check_relocs
2395 when the first R_MMIX_BASE_PLUS_OFFSET is seen. If there is no such
2396 object, there was no R_MMIX_BASE_PLUS_OFFSET. */
2397 bpo_greg_owner = (bfd *) link_info->base_file;
2398 if (bpo_greg_owner == NULL)
b34976b6 2399 return TRUE;
930b4cb2
HPN		 2400
2401 bpo_gregs_section
2402 = bfd_get_section_by_name (bpo_greg_owner,
2403 MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME);
2404
2405 /* This can't happen without DSO handling. When DSOs are handled
2406 without any R_MMIX_BASE_PLUS_OFFSET seen, there will be no such
2407 section. */
2408 if (bpo_gregs_section == NULL)
b34976b6 2409 return TRUE;
930b4cb2
HPN		 2410
2411 /* We use the target-data handle in the ELF section data. */
2412
f0abc2a1 2413 gregdata = mmix_elf_section_data (bpo_gregs_section)->bpo.greg;
930b4cb2 2414 if (gregdata == NULL)
b34976b6 2415 return FALSE;
930b4cb2
HPN		 2416
2417 n_gregs = gregdata->n_allocated_bpo_gregs;
2418
2419 bpo_gregs_section->contents
eea6121a 2420 = contents = bfd_alloc (bpo_greg_owner, bpo_gregs_section->size);
930b4cb2 2421 if (contents == NULL)
b34976b6 2422 return FALSE;
930b4cb2 2423
7e799044
HPN		 2424 /* Sanity check: If these numbers mismatch, some relocation has not been
2425 accounted for and the rest of gregdata is probably inconsistent.
2426 It's a bug, but it's more helpful to identify it than segfaulting
2427 below. */
2428 if (gregdata->n_remaining_bpo_relocs_this_relaxation_round
2429 != gregdata->n_bpo_relocs)
2430 {
2431 (*_bfd_error_handler)
2432 (_("Internal inconsistency: remaining %u != max %u.\n\
2433 Please report this bug."),
2434 gregdata->n_remaining_bpo_relocs_this_relaxation_round,
2435 gregdata->n_bpo_relocs);
b34976b6 2436 return FALSE;
7e799044
HPN		 2437 }
2438
930b4cb2
HPN		 2439 for (lastreg = 255, i = 0, j = 0; j < n_gregs; i++)
2440 if (gregdata->reloc_request[i].regindex != lastreg)
2441 {
2442 bfd_put_64 (bpo_greg_owner, gregdata->reloc_request[i].value,
2443 contents + j * 8);
2444 lastreg = gregdata->reloc_request[i].regindex;
2445 j++;
2446 }
2447
b34976b6 2448 return TRUE;
930b4cb2
HPN		 2449}
2450
2451/* Sort valid relocs to come before non-valid relocs, then on increasing
2452 value. */
2453
2454static int
2455bpo_reloc_request_sort_fn (p1, p2)
2456 const PTR p1;
2457 const PTR p2;
2458{
2459 const struct bpo_reloc_request *r1 = (const struct bpo_reloc_request *) p1;
2460 const struct bpo_reloc_request *r2 = (const struct bpo_reloc_request *) p2;
2461
2462 /* Primary function is validity; non-valid relocs sorted after valid
2463 ones. */
2464 if (r1->valid != r2->valid)
2465 return r2->valid - r1->valid;
2466
4fa5c2a8
HPN		 2467 /* Then sort on value. Don't simplify and return just the difference of
2468 the values: the upper bits of the 64-bit value would be truncated on
2469 a host with 32-bit ints. */
930b4cb2 2470 if (r1->value != r2->value)
4fa5c2a8 2471 return r1->value > r2->value ? 1 : -1;
930b4cb2 2472
dfbbae4c
HPN		 2473 /* As a last re-sort, use the relocation number, so we get a stable
2474 sort. The *addresses* aren't stable since items are swapped during
2475 sorting. It depends on the qsort implementation if this actually
2476 happens. */
2477 return r1->bpo_reloc_no > r2->bpo_reloc_no
2478 ? 1 : (r1->bpo_reloc_no < r2->bpo_reloc_no ? -1 : 0);
930b4cb2
HPN		 2479}
2480
4fa5c2a8
HPN		 2481/* For debug use only. Dumps the global register allocations resulting
2482 from base-plus-offset relocs. */
2483
2484void
2485mmix_dump_bpo_gregs (link_info, pf)
2486 struct bfd_link_info *link_info;
2487 bfd_error_handler_type pf;
2488{
2489 bfd *bpo_greg_owner;
2490 asection *bpo_gregs_section;
2491 struct bpo_greg_section_info *gregdata;
2492 unsigned int i;
2493
2494 if (link_info == NULL || link_info->base_file == NULL)
2495 return;
2496
2497 bpo_greg_owner = (bfd *) link_info->base_file;
2498
2499 bpo_gregs_section
2500 = bfd_get_section_by_name (bpo_greg_owner,
2501 MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME);
2502
2503 if (bpo_gregs_section == NULL)
2504 return;
2505
f0abc2a1 2506 gregdata = mmix_elf_section_data (bpo_gregs_section)->bpo.greg;
4fa5c2a8
HPN		 2507 if (gregdata == NULL)
2508 return;
2509
2510 if (pf == NULL)
2511 pf = _bfd_error_handler;
2512
2513 /* These format strings are not translated. They are for debug purposes
2514 only and never displayed to an end user. Should they escape, we
2515 surely want them in original. */
2516 (*pf) (" n_bpo_relocs: %u\n n_max_bpo_relocs: %u\n n_remain...round: %u\n\
2517 n_allocated_bpo_gregs: %u\n", gregdata->n_bpo_relocs,
2518 gregdata->n_max_bpo_relocs,
2519 gregdata->n_remaining_bpo_relocs_this_relaxation_round,
2520 gregdata->n_allocated_bpo_gregs);
2521
2522 if (gregdata->reloc_request)
2523 for (i = 0; i < gregdata->n_max_bpo_relocs; i++)
2524 (*pf) ("%4u (%4u)/%4u#%u: 0x%08lx%08lx r: %3u o: %3u\n",
2525 i,
cf3d882d
AM		 2526 (gregdata->bpo_reloc_indexes != NULL
2527 ? gregdata->bpo_reloc_indexes[i] : (size_t) -1),
4fa5c2a8
HPN		 2528 gregdata->reloc_request[i].bpo_reloc_no,
2529 gregdata->reloc_request[i].valid,
2530
2531 (unsigned long) (gregdata->reloc_request[i].value >> 32),
2532 (unsigned long) gregdata->reloc_request[i].value,
2533 gregdata->reloc_request[i].regindex,
2534 gregdata->reloc_request[i].offset);
2535}
2536
930b4cb2
HPN		 2537/* This links all R_MMIX_BASE_PLUS_OFFSET relocs into a special array, and
2538 when the last such reloc is done, an index-array is sorted according to
2539 the values and iterated over to produce register numbers (indexed by 0
2540 from the first allocated register number) and offsets for use in real
2541 relocation.
2542
f60ebe14
HPN		 2543 PUSHJ stub accounting is also done here.
2544
930b4cb2
HPN		 2545 Symbol- and reloc-reading infrastructure copied from elf-m10200.c. */
2546
b34976b6 2547static bfd_boolean
930b4cb2
HPN		 2548mmix_elf_relax_section (abfd, sec, link_info, again)
2549 bfd *abfd;
2550 asection *sec;
2551 struct bfd_link_info *link_info;
b34976b6 2552 bfd_boolean *again;
930b4cb2 2553{
930b4cb2 2554 Elf_Internal_Shdr *symtab_hdr;
930b4cb2 2555 Elf_Internal_Rela *internal_relocs;
930b4cb2
HPN		 2556 Elf_Internal_Rela *irel, *irelend;
2557 asection *bpo_gregs_section = NULL;
2558 struct bpo_greg_section_info *gregdata;
2559 struct bpo_reloc_section_info *bpodata
f0abc2a1 2560 = mmix_elf_section_data (sec)->bpo.reloc;
f60ebe14
HPN		 2561 /* The initialization is to quiet compiler warnings. The value is to
2562 spot a missing actual initialization. */
2563 size_t bpono = (size_t) -1;
2564 size_t pjsno = 0;
930b4cb2 2565 bfd *bpo_greg_owner;
6cdc0ccc 2566 Elf_Internal_Sym *isymbuf = NULL;
1a23a9e6 2567 bfd_size_type size = sec->rawsize ? sec->rawsize : sec->size;
f60ebe14
HPN		 2568
2569 mmix_elf_section_data (sec)->pjs.stubs_size_sum = 0;
930b4cb2
HPN		 2570
2571 /* Assume nothing changes. */
b34976b6 2572 *again = FALSE;
930b4cb2 2573
f60ebe14
HPN		 2574 /* We don't have to do anything if this section does not have relocs, or
2575 if this is not a code section. */
2576 if ((sec->flags & SEC_RELOC) == 0
930b4cb2
HPN		 2577 || sec->reloc_count == 0
2578 || (sec->flags & SEC_CODE) == 0
2579 || (sec->flags & SEC_LINKER_CREATED) != 0
f60ebe14
HPN		 2580 /* If no R_MMIX_BASE_PLUS_OFFSET relocs and no PUSHJ-stub relocs,
2581 then nothing to do. */
2582 || (bpodata == NULL
2583 && mmix_elf_section_data (sec)->pjs.n_pushj_relocs == 0))
b34976b6 2584 return TRUE;
930b4cb2
HPN		 2585
2586 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
930b4cb2
HPN		 2587
2588 bpo_greg_owner = (bfd *) link_info->base_file;
930b4cb2 2589
f60ebe14
HPN		 2590 if (bpodata != NULL)
2591 {
2592 bpo_gregs_section = bpodata->bpo_greg_section;
2593 gregdata = mmix_elf_section_data (bpo_gregs_section)->bpo.greg;
2594 bpono = bpodata->first_base_plus_offset_reloc;
2595 }
2596 else
2597 gregdata = NULL;
930b4cb2
HPN		 2598
2599 /* Get a copy of the native relocations. */
2600 internal_relocs
45d6a902
AM		 2601 = _bfd_elf_link_read_relocs (abfd, sec, (PTR) NULL,
2602 (Elf_Internal_Rela *) NULL,
2603 link_info->keep_memory);
930b4cb2
HPN		 2604 if (internal_relocs == NULL)
2605 goto error_return;
930b4cb2
HPN		 2606
2607 /* Walk through them looking for relaxing opportunities. */
2608 irelend = internal_relocs + sec->reloc_count;
2609 for (irel = internal_relocs; irel < irelend; irel++)
2610 {
2611 bfd_vma symval;
f60ebe14 2612 struct elf_link_hash_entry *h = NULL;
930b4cb2 2613
f60ebe14
HPN		 2614 /* We only process two relocs. */
2615 if (ELF64_R_TYPE (irel->r_info) != (int) R_MMIX_BASE_PLUS_OFFSET
2616 && ELF64_R_TYPE (irel->r_info) != (int) R_MMIX_PUSHJ_STUBBABLE)
930b4cb2
HPN		 2617 continue;
2618
f60ebe14
HPN		 2619 /* We process relocs in a distinctly different way when this is a
2620 relocatable link (for one, we don't look at symbols), so we avoid
2621 mixing its code with that for the "normal" relaxation. */
2622 if (link_info->relocatable)
2623 {
2624 /* The only transformation in a relocatable link is to generate
2625 a full stub at the location of the stub calculated for the
2626 input section, if the relocated stub location, the end of the
2627 output section plus earlier stubs, cannot be reached. Thus
2628 relocatable linking can only lead to worse code, but it still
2629 works. */
2630 if (ELF64_R_TYPE (irel->r_info) == R_MMIX_PUSHJ_STUBBABLE)
2631 {
2632 /* If we can reach the end of the output-section and beyond
2633 any current stubs, then we don't need a stub for this
2634 reloc. The relaxed order of output stub allocation may
2635 not exactly match the straightforward order, so we always
2636 assume presence of output stubs, which will allow
2637 relaxation only on relocations indifferent to the
2638 presence of output stub allocations for other relocations
2639 and thus the order of output stub allocation. */
2640 if (bfd_check_overflow (complain_overflow_signed,
2641 19,
2642 0,
2643 bfd_arch_bits_per_address (abfd),
2644 /* Output-stub location. */
1a23a9e6 2645 sec->output_section->rawsize
f60ebe14
HPN		 2646 + (mmix_elf_section_data (sec
2647 ->output_section)
2648 ->pjs.stubs_size_sum)
2649 /* Location of this PUSHJ reloc. */
2650 - (sec->output_offset + irel->r_offset)
2651 /* Don't count *this* stub twice. */
2652 - (mmix_elf_section_data (sec)
2653 ->pjs.stub_size[pjsno]
2654 + MAX_PUSHJ_STUB_SIZE))
2655 == bfd_reloc_ok)
2656 mmix_elf_section_data (sec)->pjs.stub_size[pjsno] = 0;
2657
2658 mmix_elf_section_data (sec)->pjs.stubs_size_sum
2659 += mmix_elf_section_data (sec)->pjs.stub_size[pjsno];
2660
2661 pjsno++;
2662 }
2663
2664 continue;
2665 }
2666
930b4cb2
HPN		 2667 /* Get the value of the symbol referred to by the reloc. */
2668 if (ELF64_R_SYM (irel->r_info) < symtab_hdr->sh_info)
2669 {
2670 /* A local symbol. */
6cdc0ccc 2671 Elf_Internal_Sym *isym;
930b4cb2
HPN		 2672 asection *sym_sec;
2673
6cdc0ccc
AM		 2674 /* Read this BFD's local symbols if we haven't already. */
2675 if (isymbuf == NULL)
2676 {
2677 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
2678 if (isymbuf == NULL)
2679 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
2680 symtab_hdr->sh_info, 0,
2681 NULL, NULL, NULL);
2682 if (isymbuf == 0)
2683 goto error_return;
2684 }
930b4cb2 2685
6cdc0ccc
AM		 2686 isym = isymbuf + ELF64_R_SYM (irel->r_info);
2687 if (isym->st_shndx == SHN_UNDEF)
930b4cb2 2688 sym_sec = bfd_und_section_ptr;
6cdc0ccc 2689 else if (isym->st_shndx == SHN_ABS)
930b4cb2 2690 sym_sec = bfd_abs_section_ptr;
6cdc0ccc 2691 else if (isym->st_shndx == SHN_COMMON)
930b4cb2
HPN		 2692 sym_sec = bfd_com_section_ptr;
2693 else
6cdc0ccc
AM		 2694 sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
2695 symval = (isym->st_value
930b4cb2
HPN		 2696 + sym_sec->output_section->vma
2697 + sym_sec->output_offset);
2698 }
2699 else
2700 {
2701 unsigned long indx;
930b4cb2
HPN		 2702
2703 /* An external symbol. */
2704 indx = ELF64_R_SYM (irel->r_info) - symtab_hdr->sh_info;
2705 h = elf_sym_hashes (abfd)[indx];
2706 BFD_ASSERT (h != NULL);
2707 if (h->root.type != bfd_link_hash_defined
2708 && h->root.type != bfd_link_hash_defweak)
2709 {
f60ebe14
HPN		 2710 /* This appears to be a reference to an undefined symbol. Just
2711 ignore it--it will be caught by the regular reloc processing.
2712 We need to keep BPO reloc accounting consistent, though
2713 else we'll abort instead of emitting an error message. */
2714 if (ELF64_R_TYPE (irel->r_info) == R_MMIX_BASE_PLUS_OFFSET
2715 && gregdata != NULL)
2716 {
2717 gregdata->n_remaining_bpo_relocs_this_relaxation_round--;
2718 bpono++;
2719 }
930b4cb2
HPN		 2720 continue;
2721 }
2722
2723 symval = (h->root.u.def.value
2724 + h->root.u.def.section->output_section->vma
2725 + h->root.u.def.section->output_offset);
2726 }
2727
f60ebe14
HPN		 2728 if (ELF64_R_TYPE (irel->r_info) == (int) R_MMIX_PUSHJ_STUBBABLE)
2729 {
2730 bfd_vma value = symval + irel->r_addend;
2731 bfd_vma dot
2732 = (sec->output_section->vma
2733 + sec->output_offset
2734 + irel->r_offset);
2735 bfd_vma stubaddr
2736 = (sec->output_section->vma
2737 + sec->output_offset
eea6121a 2738 + size
f60ebe14
HPN		 2739 + mmix_elf_section_data (sec)->pjs.stubs_size_sum);
2740
2741 if ((value & 3) == 0
2742 && bfd_check_overflow (complain_overflow_signed,
2743 19,
2744 0,
2745 bfd_arch_bits_per_address (abfd),
2746 value - dot
2747 - (value > dot
2748 ? mmix_elf_section_data (sec)
2749 ->pjs.stub_size[pjsno]
2750 : 0))
2751 == bfd_reloc_ok)
2752 /* If the reloc fits, no stub is needed. */
2753 mmix_elf_section_data (sec)->pjs.stub_size[pjsno] = 0;
2754 else
2755 /* Maybe we can get away with just a JMP insn? */
2756 if ((value & 3) == 0
2757 && bfd_check_overflow (complain_overflow_signed,
2758 27,
2759 0,
2760 bfd_arch_bits_per_address (abfd),
2761 value - stubaddr
2762 - (value > dot
2763 ? mmix_elf_section_data (sec)
2764 ->pjs.stub_size[pjsno] - 4
2765 : 0))
2766 == bfd_reloc_ok)
2767 /* Yep, account for a stub consisting of a single JMP insn. */
2768 mmix_elf_section_data (sec)->pjs.stub_size[pjsno] = 4;
2769 else
2770 /* Nope, go for the full insn stub. It doesn't seem useful to
2771 emit the intermediate sizes; those will only be useful for
2772 a >64M program assuming contiguous code. */
2773 mmix_elf_section_data (sec)->pjs.stub_size[pjsno]
2774 = MAX_PUSHJ_STUB_SIZE;
2775
2776 mmix_elf_section_data (sec)->pjs.stubs_size_sum
2777 += mmix_elf_section_data (sec)->pjs.stub_size[pjsno];
2778 pjsno++;
2779 continue;
2780 }
2781
2782 /* We're looking at a R_MMIX_BASE_PLUS_OFFSET reloc. */
2783
930b4cb2
HPN		 2784 gregdata->reloc_request[gregdata->bpo_reloc_indexes[bpono]].value
2785 = symval + irel->r_addend;
b34976b6 2786 gregdata->reloc_request[gregdata->bpo_reloc_indexes[bpono++]].valid = TRUE;
930b4cb2
HPN		 2787 gregdata->n_remaining_bpo_relocs_this_relaxation_round--;
2788 }
2789
2790 /* Check if that was the last BPO-reloc. If so, sort the values and
2791 calculate how many registers we need to cover them. Set the size of
2792 the linker gregs, and if the number of registers changed, indicate
2793 that we need to relax some more because we have more work to do. */
f60ebe14
HPN		 2794 if (gregdata != NULL
2795 && gregdata->n_remaining_bpo_relocs_this_relaxation_round == 0)
930b4cb2
HPN		 2796 {
2797 size_t i;
2798 bfd_vma prev_base;
2799 size_t regindex;
2800
2801 /* First, reset the remaining relocs for the next round. */
2802 gregdata->n_remaining_bpo_relocs_this_relaxation_round
2803 = gregdata->n_bpo_relocs;
2804
2805 qsort ((PTR) gregdata->reloc_request,
2806 gregdata->n_max_bpo_relocs,
2807 sizeof (struct bpo_reloc_request),
2808 bpo_reloc_request_sort_fn);
2809
2810 /* Recalculate indexes. When we find a change (however unlikely
2811 after the initial iteration), we know we need to relax again,
2812 since items in the GREG-array are sorted by increasing value and
2813 stored in the relaxation phase. */
2814 for (i = 0; i < gregdata->n_max_bpo_relocs; i++)
2815 if (gregdata->bpo_reloc_indexes[gregdata->reloc_request[i].bpo_reloc_no]
2816 != i)
2817 {
2818 gregdata->bpo_reloc_indexes[gregdata->reloc_request[i].bpo_reloc_no]
2819 = i;
b34976b6 2820 *again = TRUE;
930b4cb2
HPN		 2821 }
2822
2823 /* Allocate register numbers (indexing from 0). Stop at the first
2824 non-valid reloc. */
2825 for (i = 0, regindex = 0, prev_base = gregdata->reloc_request[0].value;
2826 i < gregdata->n_bpo_relocs;
2827 i++)
2828 {
2829 if (gregdata->reloc_request[i].value > prev_base + 255)
2830 {
2831 regindex++;
2832 prev_base = gregdata->reloc_request[i].value;
2833 }
2834 gregdata->reloc_request[i].regindex = regindex;
2835 gregdata->reloc_request[i].offset
2836 = gregdata->reloc_request[i].value - prev_base;
2837 }
2838
2839 /* If it's not the same as the last time, we need to relax again,
2840 because the size of the section has changed. I'm not sure we
2841 actually need to do any adjustments since the shrinking happens
2842 at the start of this section, but better safe than sorry. */
2843 if (gregdata->n_allocated_bpo_gregs != regindex + 1)
2844 {
2845 gregdata->n_allocated_bpo_gregs = regindex + 1;
b34976b6 2846 *again = TRUE;
930b4cb2
HPN		 2847 }
2848
eea6121a 2849 bpo_gregs_section->size = (regindex + 1) * 8;
930b4cb2
HPN		 2850 }
2851
6cdc0ccc 2852 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
930b4cb2
HPN		 2853 {
2854 if (! link_info->keep_memory)
6cdc0ccc
AM		 2855 free (isymbuf);
2856 else
930b4cb2 2857 {
6cdc0ccc
AM		 2858 /* Cache the symbols for elf_link_input_bfd. */
2859 symtab_hdr->contents = (unsigned char *) isymbuf;
930b4cb2
HPN		 2860 }
2861 }
2862
6cdc0ccc
AM		 2863 if (internal_relocs != NULL
2864 && elf_section_data (sec)->relocs != internal_relocs)
2865 free (internal_relocs);
2866
eea6121a 2867 if (sec->size < size + mmix_elf_section_data (sec)->pjs.stubs_size_sum)
f60ebe14
HPN		 2868 abort ();
2869
eea6121a 2870 if (sec->size > size + mmix_elf_section_data (sec)->pjs.stubs_size_sum)
f60ebe14 2871 {
eea6121a 2872 sec->size = size + mmix_elf_section_data (sec)->pjs.stubs_size_sum;
f60ebe14
HPN		 2873 *again = TRUE;
2874 }
2875
b34976b6 2876 return TRUE;
930b4cb2
HPN		 2877
2878 error_return:
6cdc0ccc
AM		 2879 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
2880 free (isymbuf);
2881 if (internal_relocs != NULL
2882 && elf_section_data (sec)->relocs != internal_relocs)
2883 free (internal_relocs);
b34976b6 2884 return FALSE;
930b4cb2
HPN		 2885}
2886\f
3c3bdf30
NC		 2887#define ELF_ARCH bfd_arch_mmix
2888#define ELF_MACHINE_CODE EM_MMIX
2889
2890/* According to mmix-doc page 36 (paragraph 45), this should be (1LL << 48LL).
2891 However, that's too much for something somewhere in the linker part of
2892 BFD; perhaps the start-address has to be a non-zero multiple of this
2893 number, or larger than this number. The symptom is that the linker
2894 complains: "warning: allocated section `.text' not in segment". We
2895 settle for 64k; the page-size used in examples is 8k.
2896 #define ELF_MAXPAGESIZE 0x10000
2897
2898 Unfortunately, this causes excessive padding in the supposedly small
2899 for-education programs that are the expected usage (where people would
2900 inspect output). We stick to 256 bytes just to have *some* default
2901 alignment. */
2902#define ELF_MAXPAGESIZE 0x100
2903
2904#define TARGET_BIG_SYM bfd_elf64_mmix_vec
2905#define TARGET_BIG_NAME "elf64-mmix"
2906
2907#define elf_info_to_howto_rel NULL
2908#define elf_info_to_howto mmix_info_to_howto_rela
2909#define elf_backend_relocate_section mmix_elf_relocate_section
2910#define elf_backend_gc_mark_hook mmix_elf_gc_mark_hook
930b4cb2
HPN		 2911#define elf_backend_gc_sweep_hook mmix_elf_gc_sweep_hook
2912
3c3bdf30
NC		 2913#define elf_backend_link_output_symbol_hook \
2914 mmix_elf_link_output_symbol_hook
2915#define elf_backend_add_symbol_hook mmix_elf_add_symbol_hook
2916
2917#define elf_backend_check_relocs mmix_elf_check_relocs
2918#define elf_backend_symbol_processing mmix_elf_symbol_processing
74541ad4
AM		 2919#define elf_backend_omit_section_dynsym \
2920 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
3c3bdf30
NC		 2921
2922#define bfd_elf64_bfd_is_local_label_name \
2923 mmix_elf_is_local_label_name
2924
2925#define elf_backend_may_use_rel_p 0
2926#define elf_backend_may_use_rela_p 1
2927#define elf_backend_default_use_rela_p 1
2928
2929#define elf_backend_can_gc_sections 1
2930#define elf_backend_section_from_bfd_section \
2931 mmix_elf_section_from_bfd_section
2932
f0abc2a1 2933#define bfd_elf64_new_section_hook mmix_elf_new_section_hook
3c3bdf30 2934#define bfd_elf64_bfd_final_link mmix_elf_final_link
930b4cb2 2935#define bfd_elf64_bfd_relax_section mmix_elf_relax_section
3c3bdf30
NC		 2936
2937#include "elf64-target.h"
GDB Binutils - Deliverables
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