Commit | Line | Data |
---|---|---|
3c3bdf30 | 1 | /* MMIX-specific support for 64-bit ELF. |
dbaa2011 AM |
2 | Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009, 2010, 2011, |
3 | 2012 | |
f592407e | 4 | Free Software Foundation, Inc. |
3c3bdf30 NC |
5 | Contributed by Hans-Peter Nilsson <hp@bitrange.com> |
6 | ||
cd123cb7 | 7 | This file is part of BFD, the Binary File Descriptor library. |
3c3bdf30 | 8 | |
cd123cb7 NC |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 3 of the License, or | |
12 | (at your option) any later version. | |
3c3bdf30 | 13 | |
cd123cb7 NC |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
22 | MA 02110-1301, USA. */ | |
3c3bdf30 | 23 | |
3c3bdf30 NC |
24 | |
25 | /* No specific ABI or "processor-specific supplement" defined. */ | |
26 | ||
27 | /* TODO: | |
f60ebe14 HPN |
28 | - "Traditional" linker relaxation (shrinking whole sections). |
29 | - Merge reloc stubs jumping to same location. | |
30 | - GETA stub relaxation (call a stub for out of range new | |
31 | R_MMIX_GETA_STUBBABLE). */ | |
3c3bdf30 | 32 | |
3c3bdf30 | 33 | #include "sysdep.h" |
3db64b00 | 34 | #include "bfd.h" |
3c3bdf30 NC |
35 | #include "libbfd.h" |
36 | #include "elf-bfd.h" | |
37 | #include "elf/mmix.h" | |
38 | #include "opcode/mmix.h" | |
39 | ||
40 | #define MINUS_ONE (((bfd_vma) 0) - 1) | |
41 | ||
f60ebe14 HPN |
42 | #define MAX_PUSHJ_STUB_SIZE (5 * 4) |
43 | ||
3c3bdf30 NC |
44 | /* Put these everywhere in new code. */ |
45 | #define FATAL_DEBUG \ | |
46 | _bfd_abort (__FILE__, __LINE__, \ | |
47 | "Internal: Non-debugged code (test-case missing)") | |
48 | ||
49 | #define BAD_CASE(x) \ | |
50 | _bfd_abort (__FILE__, __LINE__, \ | |
51 | "bad case for " #x) | |
52 | ||
f0abc2a1 AM |
53 | struct _mmix_elf_section_data |
54 | { | |
55 | struct bfd_elf_section_data elf; | |
56 | union | |
57 | { | |
58 | struct bpo_reloc_section_info *reloc; | |
59 | struct bpo_greg_section_info *greg; | |
60 | } bpo; | |
f60ebe14 HPN |
61 | |
62 | struct pushj_stub_info | |
63 | { | |
64 | /* Maximum number of stubs needed for this section. */ | |
65 | bfd_size_type n_pushj_relocs; | |
66 | ||
67 | /* Size of stubs after a mmix_elf_relax_section round. */ | |
68 | bfd_size_type stubs_size_sum; | |
69 | ||
70 | /* Per-reloc stubs_size_sum information. The stubs_size_sum member is the sum | |
71 | of these. Allocated in mmix_elf_check_common_relocs. */ | |
72 | bfd_size_type *stub_size; | |
73 | ||
74 | /* Offset of next stub during relocation. Somewhat redundant with the | |
75 | above: error coverage is easier and we don't have to reset the | |
76 | stubs_size_sum for relocation. */ | |
77 | bfd_size_type stub_offset; | |
78 | } pjs; | |
18978b27 HPN |
79 | |
80 | /* Whether there has been a warning that this section could not be | |
81 | linked due to a specific cause. FIXME: a way to access the | |
82 | linker info or output section, then stuff the limiter guard | |
83 | there. */ | |
84 | bfd_boolean has_warned_bpo; | |
85 | bfd_boolean has_warned_pushj; | |
f0abc2a1 AM |
86 | }; |
87 | ||
88 | #define mmix_elf_section_data(sec) \ | |
68bfbfcc | 89 | ((struct _mmix_elf_section_data *) elf_section_data (sec)) |
f0abc2a1 | 90 | |
930b4cb2 | 91 | /* For each section containing a base-plus-offset (BPO) reloc, we attach |
f0abc2a1 | 92 | this struct as mmix_elf_section_data (section)->bpo, which is otherwise |
930b4cb2 HPN |
93 | NULL. */ |
94 | struct bpo_reloc_section_info | |
95 | { | |
96 | /* The base is 1; this is the first number in this section. */ | |
97 | size_t first_base_plus_offset_reloc; | |
98 | ||
99 | /* Number of BPO-relocs in this section. */ | |
100 | size_t n_bpo_relocs_this_section; | |
101 | ||
102 | /* Running index, used at relocation time. */ | |
103 | size_t bpo_index; | |
104 | ||
105 | /* We don't have access to the bfd_link_info struct in | |
106 | mmix_final_link_relocate. What we really want to get at is the | |
107 | global single struct greg_relocation, so we stash it here. */ | |
108 | asection *bpo_greg_section; | |
109 | }; | |
110 | ||
111 | /* Helper struct (in global context) for the one below. | |
112 | There's one of these created for every BPO reloc. */ | |
113 | struct bpo_reloc_request | |
114 | { | |
115 | bfd_vma value; | |
116 | ||
117 | /* Valid after relaxation. The base is 0; the first register number | |
118 | must be added. The offset is in range 0..255. */ | |
119 | size_t regindex; | |
120 | size_t offset; | |
121 | ||
122 | /* The order number for this BPO reloc, corresponding to the order in | |
123 | which BPO relocs were found. Used to create an index after reloc | |
124 | requests are sorted. */ | |
125 | size_t bpo_reloc_no; | |
126 | ||
127 | /* Set when the value is computed. Better than coding "guard values" | |
b34976b6 | 128 | into the other members. Is FALSE only for BPO relocs in a GC:ed |
930b4cb2 | 129 | section. */ |
b34976b6 | 130 | bfd_boolean valid; |
930b4cb2 HPN |
131 | }; |
132 | ||
f0abc2a1 | 133 | /* We attach this as mmix_elf_section_data (sec)->bpo in the linker-allocated |
930b4cb2 HPN |
134 | greg contents section (MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME), |
135 | which is linked into the register contents section | |
136 | (MMIX_REG_CONTENTS_SECTION_NAME). This section is created by the | |
137 | linker; using the same hook as for usual with BPO relocs does not | |
138 | collide. */ | |
139 | struct bpo_greg_section_info | |
140 | { | |
141 | /* After GC, this reflects the number of remaining, non-excluded | |
142 | BPO-relocs. */ | |
143 | size_t n_bpo_relocs; | |
144 | ||
145 | /* This is the number of allocated bpo_reloc_requests; the size of | |
146 | sorted_indexes. Valid after the check.*relocs functions are called | |
147 | for all incoming sections. It includes the number of BPO relocs in | |
148 | sections that were GC:ed. */ | |
149 | size_t n_max_bpo_relocs; | |
150 | ||
151 | /* A counter used to find out when to fold the BPO gregs, since we | |
152 | don't have a single "after-relaxation" hook. */ | |
153 | size_t n_remaining_bpo_relocs_this_relaxation_round; | |
154 | ||
155 | /* The number of linker-allocated GREGs resulting from BPO relocs. | |
f60ebe14 HPN |
156 | This is an approximation after _bfd_mmix_before_linker_allocation |
157 | and supposedly accurate after mmix_elf_relax_section is called for | |
158 | all incoming non-collected sections. */ | |
930b4cb2 HPN |
159 | size_t n_allocated_bpo_gregs; |
160 | ||
161 | /* Index into reloc_request[], sorted on increasing "value", secondary | |
162 | by increasing index for strict sorting order. */ | |
163 | size_t *bpo_reloc_indexes; | |
164 | ||
165 | /* An array of all relocations, with the "value" member filled in by | |
166 | the relaxation function. */ | |
167 | struct bpo_reloc_request *reloc_request; | |
168 | }; | |
169 | ||
6e0b88f1 | 170 | static int mmix_elf_link_output_symbol_hook |
754021d0 AM |
171 | PARAMS ((struct bfd_link_info *, const char *, Elf_Internal_Sym *, |
172 | asection *, struct elf_link_hash_entry *)); | |
3c3bdf30 NC |
173 | |
174 | static bfd_reloc_status_type mmix_elf_reloc | |
175 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
176 | ||
177 | static reloc_howto_type *bfd_elf64_bfd_reloc_type_lookup | |
178 | PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
179 | ||
180 | static void mmix_info_to_howto_rela | |
947216bf | 181 | PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); |
3c3bdf30 NC |
182 | |
183 | static int mmix_elf_sort_relocs PARAMS ((const PTR, const PTR)); | |
184 | ||
f0abc2a1 AM |
185 | static bfd_boolean mmix_elf_new_section_hook |
186 | PARAMS ((bfd *, asection *)); | |
187 | ||
b34976b6 | 188 | static bfd_boolean mmix_elf_check_relocs |
3c3bdf30 NC |
189 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
190 | const Elf_Internal_Rela *)); | |
191 | ||
b34976b6 | 192 | static bfd_boolean mmix_elf_check_common_relocs |
930b4cb2 HPN |
193 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
194 | const Elf_Internal_Rela *)); | |
195 | ||
b34976b6 | 196 | static bfd_boolean mmix_elf_relocate_section |
3c3bdf30 NC |
197 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
198 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
199 | ||
3c3bdf30 | 200 | static bfd_reloc_status_type mmix_final_link_relocate |
18978b27 HPN |
201 | (reloc_howto_type *, asection *, bfd_byte *, bfd_vma, bfd_signed_vma, |
202 | bfd_vma, const char *, asection *, char **); | |
3c3bdf30 NC |
203 | |
204 | static bfd_reloc_status_type mmix_elf_perform_relocation | |
18978b27 | 205 | (asection *, reloc_howto_type *, void *, bfd_vma, bfd_vma, char **); |
3c3bdf30 | 206 | |
b34976b6 | 207 | static bfd_boolean mmix_elf_section_from_bfd_section |
af746e92 | 208 | PARAMS ((bfd *, asection *, int *)); |
3c3bdf30 | 209 | |
b34976b6 | 210 | static bfd_boolean mmix_elf_add_symbol_hook |
555cd476 | 211 | PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Sym *, |
3c3bdf30 NC |
212 | const char **, flagword *, asection **, bfd_vma *)); |
213 | ||
b34976b6 | 214 | static bfd_boolean mmix_elf_is_local_label_name |
3c3bdf30 NC |
215 | PARAMS ((bfd *, const char *)); |
216 | ||
930b4cb2 HPN |
217 | static int bpo_reloc_request_sort_fn PARAMS ((const PTR, const PTR)); |
218 | ||
b34976b6 | 219 | static bfd_boolean mmix_elf_relax_section |
930b4cb2 | 220 | PARAMS ((bfd *abfd, asection *sec, struct bfd_link_info *link_info, |
b34976b6 | 221 | bfd_boolean *again)); |
930b4cb2 | 222 | |
b34976b6 | 223 | extern bfd_boolean mmix_elf_final_link PARAMS ((bfd *, struct bfd_link_info *)); |
3c3bdf30 NC |
224 | |
225 | extern void mmix_elf_symbol_processing PARAMS ((bfd *, asymbol *)); | |
226 | ||
4fa5c2a8 HPN |
227 | /* Only intended to be called from a debugger. */ |
228 | extern void mmix_dump_bpo_gregs | |
229 | PARAMS ((struct bfd_link_info *, bfd_error_handler_type)); | |
230 | ||
f60ebe14 HPN |
231 | static void |
232 | mmix_set_relaxable_size | |
233 | PARAMS ((bfd *, asection *, void *)); | |
234 | ||
f60ebe14 | 235 | |
3c3bdf30 NC |
236 | /* Watch out: this currently needs to have elements with the same index as |
237 | their R_MMIX_ number. */ | |
238 | static reloc_howto_type elf_mmix_howto_table[] = | |
239 | { | |
240 | /* This reloc does nothing. */ | |
241 | HOWTO (R_MMIX_NONE, /* type */ | |
242 | 0, /* rightshift */ | |
243 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
244 | 32, /* bitsize */ | |
b34976b6 | 245 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
246 | 0, /* bitpos */ |
247 | complain_overflow_bitfield, /* complain_on_overflow */ | |
248 | bfd_elf_generic_reloc, /* special_function */ | |
249 | "R_MMIX_NONE", /* name */ | |
b34976b6 | 250 | FALSE, /* partial_inplace */ |
3c3bdf30 NC |
251 | 0, /* src_mask */ |
252 | 0, /* dst_mask */ | |
b34976b6 | 253 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
254 | |
255 | /* An 8 bit absolute relocation. */ | |
256 | HOWTO (R_MMIX_8, /* type */ | |
257 | 0, /* rightshift */ | |
258 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
259 | 8, /* bitsize */ | |
b34976b6 | 260 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
261 | 0, /* bitpos */ |
262 | complain_overflow_bitfield, /* complain_on_overflow */ | |
263 | bfd_elf_generic_reloc, /* special_function */ | |
264 | "R_MMIX_8", /* name */ | |
b34976b6 | 265 | FALSE, /* partial_inplace */ |
930b4cb2 | 266 | 0, /* src_mask */ |
3c3bdf30 | 267 | 0xff, /* dst_mask */ |
b34976b6 | 268 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
269 | |
270 | /* An 16 bit absolute relocation. */ | |
271 | HOWTO (R_MMIX_16, /* type */ | |
272 | 0, /* rightshift */ | |
273 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
274 | 16, /* bitsize */ | |
b34976b6 | 275 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
276 | 0, /* bitpos */ |
277 | complain_overflow_bitfield, /* complain_on_overflow */ | |
278 | bfd_elf_generic_reloc, /* special_function */ | |
279 | "R_MMIX_16", /* name */ | |
b34976b6 | 280 | FALSE, /* partial_inplace */ |
930b4cb2 | 281 | 0, /* src_mask */ |
3c3bdf30 | 282 | 0xffff, /* dst_mask */ |
b34976b6 | 283 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
284 | |
285 | /* An 24 bit absolute relocation. */ | |
286 | HOWTO (R_MMIX_24, /* type */ | |
287 | 0, /* rightshift */ | |
288 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
289 | 24, /* bitsize */ | |
b34976b6 | 290 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
291 | 0, /* bitpos */ |
292 | complain_overflow_bitfield, /* complain_on_overflow */ | |
293 | bfd_elf_generic_reloc, /* special_function */ | |
294 | "R_MMIX_24", /* name */ | |
b34976b6 | 295 | FALSE, /* partial_inplace */ |
930b4cb2 | 296 | ~0xffffff, /* src_mask */ |
3c3bdf30 | 297 | 0xffffff, /* dst_mask */ |
b34976b6 | 298 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
299 | |
300 | /* A 32 bit absolute relocation. */ | |
301 | HOWTO (R_MMIX_32, /* type */ | |
302 | 0, /* rightshift */ | |
303 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
304 | 32, /* bitsize */ | |
b34976b6 | 305 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
306 | 0, /* bitpos */ |
307 | complain_overflow_bitfield, /* complain_on_overflow */ | |
308 | bfd_elf_generic_reloc, /* special_function */ | |
309 | "R_MMIX_32", /* name */ | |
b34976b6 | 310 | FALSE, /* partial_inplace */ |
930b4cb2 | 311 | 0, /* src_mask */ |
3c3bdf30 | 312 | 0xffffffff, /* dst_mask */ |
b34976b6 | 313 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
314 | |
315 | /* 64 bit relocation. */ | |
316 | HOWTO (R_MMIX_64, /* type */ | |
317 | 0, /* rightshift */ | |
318 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
319 | 64, /* bitsize */ | |
b34976b6 | 320 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
321 | 0, /* bitpos */ |
322 | complain_overflow_bitfield, /* complain_on_overflow */ | |
323 | bfd_elf_generic_reloc, /* special_function */ | |
324 | "R_MMIX_64", /* name */ | |
b34976b6 | 325 | FALSE, /* partial_inplace */ |
930b4cb2 | 326 | 0, /* src_mask */ |
3c3bdf30 | 327 | MINUS_ONE, /* dst_mask */ |
b34976b6 | 328 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
329 | |
330 | /* An 8 bit PC-relative relocation. */ | |
331 | HOWTO (R_MMIX_PC_8, /* type */ | |
332 | 0, /* rightshift */ | |
333 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
334 | 8, /* bitsize */ | |
b34976b6 | 335 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
336 | 0, /* bitpos */ |
337 | complain_overflow_bitfield, /* complain_on_overflow */ | |
338 | bfd_elf_generic_reloc, /* special_function */ | |
339 | "R_MMIX_PC_8", /* name */ | |
b34976b6 | 340 | FALSE, /* partial_inplace */ |
930b4cb2 | 341 | 0, /* src_mask */ |
3c3bdf30 | 342 | 0xff, /* dst_mask */ |
b34976b6 | 343 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
344 | |
345 | /* An 16 bit PC-relative relocation. */ | |
346 | HOWTO (R_MMIX_PC_16, /* type */ | |
347 | 0, /* rightshift */ | |
348 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
349 | 16, /* bitsize */ | |
b34976b6 | 350 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
351 | 0, /* bitpos */ |
352 | complain_overflow_bitfield, /* complain_on_overflow */ | |
353 | bfd_elf_generic_reloc, /* special_function */ | |
354 | "R_MMIX_PC_16", /* name */ | |
b34976b6 | 355 | FALSE, /* partial_inplace */ |
930b4cb2 | 356 | 0, /* src_mask */ |
3c3bdf30 | 357 | 0xffff, /* dst_mask */ |
b34976b6 | 358 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
359 | |
360 | /* An 24 bit PC-relative relocation. */ | |
361 | HOWTO (R_MMIX_PC_24, /* type */ | |
362 | 0, /* rightshift */ | |
363 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
364 | 24, /* bitsize */ | |
b34976b6 | 365 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
366 | 0, /* bitpos */ |
367 | complain_overflow_bitfield, /* complain_on_overflow */ | |
368 | bfd_elf_generic_reloc, /* special_function */ | |
369 | "R_MMIX_PC_24", /* name */ | |
b34976b6 | 370 | FALSE, /* partial_inplace */ |
930b4cb2 | 371 | ~0xffffff, /* src_mask */ |
3c3bdf30 | 372 | 0xffffff, /* dst_mask */ |
b34976b6 | 373 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
374 | |
375 | /* A 32 bit absolute PC-relative relocation. */ | |
376 | HOWTO (R_MMIX_PC_32, /* type */ | |
377 | 0, /* rightshift */ | |
378 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
379 | 32, /* bitsize */ | |
b34976b6 | 380 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
381 | 0, /* bitpos */ |
382 | complain_overflow_bitfield, /* complain_on_overflow */ | |
383 | bfd_elf_generic_reloc, /* special_function */ | |
384 | "R_MMIX_PC_32", /* name */ | |
b34976b6 | 385 | FALSE, /* partial_inplace */ |
930b4cb2 | 386 | 0, /* src_mask */ |
3c3bdf30 | 387 | 0xffffffff, /* dst_mask */ |
b34976b6 | 388 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
389 | |
390 | /* 64 bit PC-relative relocation. */ | |
391 | HOWTO (R_MMIX_PC_64, /* type */ | |
392 | 0, /* rightshift */ | |
393 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
394 | 64, /* bitsize */ | |
b34976b6 | 395 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
396 | 0, /* bitpos */ |
397 | complain_overflow_bitfield, /* complain_on_overflow */ | |
398 | bfd_elf_generic_reloc, /* special_function */ | |
399 | "R_MMIX_PC_64", /* name */ | |
b34976b6 | 400 | FALSE, /* partial_inplace */ |
930b4cb2 | 401 | 0, /* src_mask */ |
3c3bdf30 | 402 | MINUS_ONE, /* dst_mask */ |
b34976b6 | 403 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
404 | |
405 | /* GNU extension to record C++ vtable hierarchy. */ | |
406 | HOWTO (R_MMIX_GNU_VTINHERIT, /* type */ | |
407 | 0, /* rightshift */ | |
408 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
409 | 0, /* bitsize */ | |
b34976b6 | 410 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
411 | 0, /* bitpos */ |
412 | complain_overflow_dont, /* complain_on_overflow */ | |
413 | NULL, /* special_function */ | |
414 | "R_MMIX_GNU_VTINHERIT", /* name */ | |
b34976b6 | 415 | FALSE, /* partial_inplace */ |
3c3bdf30 NC |
416 | 0, /* src_mask */ |
417 | 0, /* dst_mask */ | |
b34976b6 | 418 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
419 | |
420 | /* GNU extension to record C++ vtable member usage. */ | |
421 | HOWTO (R_MMIX_GNU_VTENTRY, /* type */ | |
422 | 0, /* rightshift */ | |
423 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
424 | 0, /* bitsize */ | |
b34976b6 | 425 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
426 | 0, /* bitpos */ |
427 | complain_overflow_dont, /* complain_on_overflow */ | |
428 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
429 | "R_MMIX_GNU_VTENTRY", /* name */ | |
b34976b6 | 430 | FALSE, /* partial_inplace */ |
3c3bdf30 NC |
431 | 0, /* src_mask */ |
432 | 0, /* dst_mask */ | |
b34976b6 | 433 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
434 | |
435 | /* The GETA relocation is supposed to get any address that could | |
436 | possibly be reached by the GETA instruction. It can silently expand | |
437 | to get a 64-bit operand, but will complain if any of the two least | |
438 | significant bits are set. The howto members reflect a simple GETA. */ | |
439 | HOWTO (R_MMIX_GETA, /* type */ | |
440 | 2, /* rightshift */ | |
441 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
442 | 19, /* bitsize */ | |
b34976b6 | 443 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
444 | 0, /* bitpos */ |
445 | complain_overflow_signed, /* complain_on_overflow */ | |
446 | mmix_elf_reloc, /* special_function */ | |
447 | "R_MMIX_GETA", /* name */ | |
b34976b6 | 448 | FALSE, /* partial_inplace */ |
930b4cb2 | 449 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 450 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 451 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
452 | |
453 | HOWTO (R_MMIX_GETA_1, /* type */ | |
454 | 2, /* rightshift */ | |
455 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
456 | 19, /* bitsize */ | |
b34976b6 | 457 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
458 | 0, /* bitpos */ |
459 | complain_overflow_signed, /* complain_on_overflow */ | |
460 | mmix_elf_reloc, /* special_function */ | |
461 | "R_MMIX_GETA_1", /* name */ | |
b34976b6 | 462 | FALSE, /* partial_inplace */ |
930b4cb2 | 463 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 464 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 465 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
466 | |
467 | HOWTO (R_MMIX_GETA_2, /* type */ | |
468 | 2, /* rightshift */ | |
469 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
470 | 19, /* bitsize */ | |
b34976b6 | 471 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
472 | 0, /* bitpos */ |
473 | complain_overflow_signed, /* complain_on_overflow */ | |
474 | mmix_elf_reloc, /* special_function */ | |
475 | "R_MMIX_GETA_2", /* name */ | |
b34976b6 | 476 | FALSE, /* partial_inplace */ |
930b4cb2 | 477 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 478 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 479 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
480 | |
481 | HOWTO (R_MMIX_GETA_3, /* type */ | |
482 | 2, /* rightshift */ | |
483 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
484 | 19, /* bitsize */ | |
b34976b6 | 485 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
486 | 0, /* bitpos */ |
487 | complain_overflow_signed, /* complain_on_overflow */ | |
488 | mmix_elf_reloc, /* special_function */ | |
489 | "R_MMIX_GETA_3", /* name */ | |
b34976b6 | 490 | FALSE, /* partial_inplace */ |
930b4cb2 | 491 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 492 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 493 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
494 | |
495 | /* The conditional branches are supposed to reach any (code) address. | |
496 | It can silently expand to a 64-bit operand, but will emit an error if | |
497 | any of the two least significant bits are set. The howto members | |
498 | reflect a simple branch. */ | |
499 | HOWTO (R_MMIX_CBRANCH, /* type */ | |
500 | 2, /* rightshift */ | |
501 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
502 | 19, /* bitsize */ | |
b34976b6 | 503 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
504 | 0, /* bitpos */ |
505 | complain_overflow_signed, /* complain_on_overflow */ | |
506 | mmix_elf_reloc, /* special_function */ | |
507 | "R_MMIX_CBRANCH", /* name */ | |
b34976b6 | 508 | FALSE, /* partial_inplace */ |
930b4cb2 | 509 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 510 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 511 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
512 | |
513 | HOWTO (R_MMIX_CBRANCH_J, /* type */ | |
514 | 2, /* rightshift */ | |
515 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
516 | 19, /* bitsize */ | |
b34976b6 | 517 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
518 | 0, /* bitpos */ |
519 | complain_overflow_signed, /* complain_on_overflow */ | |
520 | mmix_elf_reloc, /* special_function */ | |
521 | "R_MMIX_CBRANCH_J", /* name */ | |
b34976b6 | 522 | FALSE, /* partial_inplace */ |
930b4cb2 | 523 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 524 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 525 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
526 | |
527 | HOWTO (R_MMIX_CBRANCH_1, /* type */ | |
528 | 2, /* rightshift */ | |
529 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
530 | 19, /* bitsize */ | |
b34976b6 | 531 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
532 | 0, /* bitpos */ |
533 | complain_overflow_signed, /* complain_on_overflow */ | |
534 | mmix_elf_reloc, /* special_function */ | |
535 | "R_MMIX_CBRANCH_1", /* name */ | |
b34976b6 | 536 | FALSE, /* partial_inplace */ |
930b4cb2 | 537 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 538 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 539 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
540 | |
541 | HOWTO (R_MMIX_CBRANCH_2, /* type */ | |
542 | 2, /* rightshift */ | |
543 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
544 | 19, /* bitsize */ | |
b34976b6 | 545 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
546 | 0, /* bitpos */ |
547 | complain_overflow_signed, /* complain_on_overflow */ | |
548 | mmix_elf_reloc, /* special_function */ | |
549 | "R_MMIX_CBRANCH_2", /* name */ | |
b34976b6 | 550 | FALSE, /* partial_inplace */ |
930b4cb2 | 551 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 552 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 553 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
554 | |
555 | HOWTO (R_MMIX_CBRANCH_3, /* type */ | |
556 | 2, /* rightshift */ | |
557 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
558 | 19, /* bitsize */ | |
b34976b6 | 559 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
560 | 0, /* bitpos */ |
561 | complain_overflow_signed, /* complain_on_overflow */ | |
562 | mmix_elf_reloc, /* special_function */ | |
563 | "R_MMIX_CBRANCH_3", /* name */ | |
b34976b6 | 564 | FALSE, /* partial_inplace */ |
930b4cb2 | 565 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 566 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 567 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
568 | |
569 | /* The PUSHJ instruction can reach any (code) address, as long as it's | |
570 | the beginning of a function (no usable restriction). It can silently | |
571 | expand to a 64-bit operand, but will emit an error if any of the two | |
f60ebe14 HPN |
572 | least significant bits are set. It can also expand into a call to a |
573 | stub; see R_MMIX_PUSHJ_STUBBABLE. The howto members reflect a simple | |
3c3bdf30 NC |
574 | PUSHJ. */ |
575 | HOWTO (R_MMIX_PUSHJ, /* type */ | |
576 | 2, /* rightshift */ | |
577 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
578 | 19, /* bitsize */ | |
b34976b6 | 579 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
580 | 0, /* bitpos */ |
581 | complain_overflow_signed, /* complain_on_overflow */ | |
582 | mmix_elf_reloc, /* special_function */ | |
583 | "R_MMIX_PUSHJ", /* name */ | |
b34976b6 | 584 | FALSE, /* partial_inplace */ |
930b4cb2 | 585 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 586 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 587 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
588 | |
589 | HOWTO (R_MMIX_PUSHJ_1, /* type */ | |
590 | 2, /* rightshift */ | |
591 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
592 | 19, /* bitsize */ | |
b34976b6 | 593 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
594 | 0, /* bitpos */ |
595 | complain_overflow_signed, /* complain_on_overflow */ | |
596 | mmix_elf_reloc, /* special_function */ | |
597 | "R_MMIX_PUSHJ_1", /* name */ | |
b34976b6 | 598 | FALSE, /* partial_inplace */ |
930b4cb2 | 599 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 600 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 601 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
602 | |
603 | HOWTO (R_MMIX_PUSHJ_2, /* type */ | |
604 | 2, /* rightshift */ | |
605 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
606 | 19, /* bitsize */ | |
b34976b6 | 607 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
608 | 0, /* bitpos */ |
609 | complain_overflow_signed, /* complain_on_overflow */ | |
610 | mmix_elf_reloc, /* special_function */ | |
611 | "R_MMIX_PUSHJ_2", /* name */ | |
b34976b6 | 612 | FALSE, /* partial_inplace */ |
930b4cb2 | 613 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 614 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 615 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
616 | |
617 | HOWTO (R_MMIX_PUSHJ_3, /* type */ | |
618 | 2, /* rightshift */ | |
619 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
620 | 19, /* bitsize */ | |
b34976b6 | 621 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
622 | 0, /* bitpos */ |
623 | complain_overflow_signed, /* complain_on_overflow */ | |
624 | mmix_elf_reloc, /* special_function */ | |
625 | "R_MMIX_PUSHJ_3", /* name */ | |
b34976b6 | 626 | FALSE, /* partial_inplace */ |
930b4cb2 | 627 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 628 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 629 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
630 | |
631 | /* A JMP is supposed to reach any (code) address. By itself, it can | |
632 | reach +-64M; the expansion can reach all 64 bits. Note that the 64M | |
633 | limit is soon reached if you link the program in wildly different | |
634 | memory segments. The howto members reflect a trivial JMP. */ | |
635 | HOWTO (R_MMIX_JMP, /* type */ | |
636 | 2, /* rightshift */ | |
637 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
638 | 27, /* bitsize */ | |
b34976b6 | 639 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
640 | 0, /* bitpos */ |
641 | complain_overflow_signed, /* complain_on_overflow */ | |
642 | mmix_elf_reloc, /* special_function */ | |
643 | "R_MMIX_JMP", /* name */ | |
b34976b6 | 644 | FALSE, /* partial_inplace */ |
930b4cb2 | 645 | ~0x1ffffff, /* src_mask */ |
3c3bdf30 | 646 | 0x1ffffff, /* dst_mask */ |
b34976b6 | 647 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
648 | |
649 | HOWTO (R_MMIX_JMP_1, /* type */ | |
650 | 2, /* rightshift */ | |
651 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
652 | 27, /* bitsize */ | |
b34976b6 | 653 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
654 | 0, /* bitpos */ |
655 | complain_overflow_signed, /* complain_on_overflow */ | |
656 | mmix_elf_reloc, /* special_function */ | |
657 | "R_MMIX_JMP_1", /* name */ | |
b34976b6 | 658 | FALSE, /* partial_inplace */ |
930b4cb2 | 659 | ~0x1ffffff, /* src_mask */ |
3c3bdf30 | 660 | 0x1ffffff, /* dst_mask */ |
b34976b6 | 661 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
662 | |
663 | HOWTO (R_MMIX_JMP_2, /* type */ | |
664 | 2, /* rightshift */ | |
665 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
666 | 27, /* bitsize */ | |
b34976b6 | 667 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
668 | 0, /* bitpos */ |
669 | complain_overflow_signed, /* complain_on_overflow */ | |
670 | mmix_elf_reloc, /* special_function */ | |
671 | "R_MMIX_JMP_2", /* name */ | |
b34976b6 | 672 | FALSE, /* partial_inplace */ |
930b4cb2 | 673 | ~0x1ffffff, /* src_mask */ |
3c3bdf30 | 674 | 0x1ffffff, /* dst_mask */ |
b34976b6 | 675 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
676 | |
677 | HOWTO (R_MMIX_JMP_3, /* type */ | |
678 | 2, /* rightshift */ | |
679 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
680 | 27, /* bitsize */ | |
b34976b6 | 681 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
682 | 0, /* bitpos */ |
683 | complain_overflow_signed, /* complain_on_overflow */ | |
684 | mmix_elf_reloc, /* special_function */ | |
685 | "R_MMIX_JMP_3", /* name */ | |
b34976b6 | 686 | FALSE, /* partial_inplace */ |
930b4cb2 | 687 | ~0x1ffffff, /* src_mask */ |
3c3bdf30 | 688 | 0x1ffffff, /* dst_mask */ |
b34976b6 | 689 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
690 | |
691 | /* When we don't emit link-time-relaxable code from the assembler, or | |
692 | when relaxation has done all it can do, these relocs are used. For | |
693 | GETA/PUSHJ/branches. */ | |
694 | HOWTO (R_MMIX_ADDR19, /* type */ | |
695 | 2, /* rightshift */ | |
696 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
697 | 19, /* bitsize */ | |
b34976b6 | 698 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
699 | 0, /* bitpos */ |
700 | complain_overflow_signed, /* complain_on_overflow */ | |
701 | mmix_elf_reloc, /* special_function */ | |
702 | "R_MMIX_ADDR19", /* name */ | |
b34976b6 | 703 | FALSE, /* partial_inplace */ |
930b4cb2 | 704 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 705 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 706 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
707 | |
708 | /* For JMP. */ | |
709 | HOWTO (R_MMIX_ADDR27, /* type */ | |
710 | 2, /* rightshift */ | |
711 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
712 | 27, /* bitsize */ | |
b34976b6 | 713 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
714 | 0, /* bitpos */ |
715 | complain_overflow_signed, /* complain_on_overflow */ | |
716 | mmix_elf_reloc, /* special_function */ | |
717 | "R_MMIX_ADDR27", /* name */ | |
b34976b6 | 718 | FALSE, /* partial_inplace */ |
930b4cb2 | 719 | ~0x1ffffff, /* src_mask */ |
3c3bdf30 | 720 | 0x1ffffff, /* dst_mask */ |
b34976b6 | 721 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
722 | |
723 | /* A general register or the value 0..255. If a value, then the | |
724 | instruction (offset -3) needs adjusting. */ | |
725 | HOWTO (R_MMIX_REG_OR_BYTE, /* type */ | |
726 | 0, /* rightshift */ | |
727 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
728 | 8, /* bitsize */ | |
b34976b6 | 729 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
730 | 0, /* bitpos */ |
731 | complain_overflow_bitfield, /* complain_on_overflow */ | |
732 | mmix_elf_reloc, /* special_function */ | |
733 | "R_MMIX_REG_OR_BYTE", /* name */ | |
b34976b6 | 734 | FALSE, /* partial_inplace */ |
930b4cb2 | 735 | 0, /* src_mask */ |
3c3bdf30 | 736 | 0xff, /* dst_mask */ |
b34976b6 | 737 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
738 | |
739 | /* A general register. */ | |
740 | HOWTO (R_MMIX_REG, /* type */ | |
741 | 0, /* rightshift */ | |
742 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
743 | 8, /* bitsize */ | |
b34976b6 | 744 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
745 | 0, /* bitpos */ |
746 | complain_overflow_bitfield, /* complain_on_overflow */ | |
747 | mmix_elf_reloc, /* special_function */ | |
748 | "R_MMIX_REG", /* name */ | |
b34976b6 | 749 | FALSE, /* partial_inplace */ |
930b4cb2 | 750 | 0, /* src_mask */ |
3c3bdf30 | 751 | 0xff, /* dst_mask */ |
b34976b6 | 752 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
753 | |
754 | /* A register plus an index, corresponding to the relocation expression. | |
755 | The sizes must correspond to the valid range of the expression, while | |
756 | the bitmasks correspond to what we store in the image. */ | |
757 | HOWTO (R_MMIX_BASE_PLUS_OFFSET, /* type */ | |
758 | 0, /* rightshift */ | |
759 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
760 | 64, /* bitsize */ | |
b34976b6 | 761 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
762 | 0, /* bitpos */ |
763 | complain_overflow_bitfield, /* complain_on_overflow */ | |
764 | mmix_elf_reloc, /* special_function */ | |
765 | "R_MMIX_BASE_PLUS_OFFSET", /* name */ | |
b34976b6 | 766 | FALSE, /* partial_inplace */ |
930b4cb2 | 767 | 0, /* src_mask */ |
3c3bdf30 | 768 | 0xffff, /* dst_mask */ |
b34976b6 | 769 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
770 | |
771 | /* A "magic" relocation for a LOCAL expression, asserting that the | |
772 | expression is less than the number of global registers. No actual | |
773 | modification of the contents is done. Implementing this as a | |
774 | relocation was less intrusive than e.g. putting such expressions in a | |
775 | section to discard *after* relocation. */ | |
776 | HOWTO (R_MMIX_LOCAL, /* type */ | |
777 | 0, /* rightshift */ | |
778 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
779 | 0, /* bitsize */ | |
b34976b6 | 780 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
781 | 0, /* bitpos */ |
782 | complain_overflow_dont, /* complain_on_overflow */ | |
783 | mmix_elf_reloc, /* special_function */ | |
784 | "R_MMIX_LOCAL", /* name */ | |
b34976b6 | 785 | FALSE, /* partial_inplace */ |
3c3bdf30 NC |
786 | 0, /* src_mask */ |
787 | 0, /* dst_mask */ | |
b34976b6 | 788 | FALSE), /* pcrel_offset */ |
f60ebe14 HPN |
789 | |
790 | HOWTO (R_MMIX_PUSHJ_STUBBABLE, /* type */ | |
791 | 2, /* rightshift */ | |
792 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
793 | 19, /* bitsize */ | |
794 | TRUE, /* pc_relative */ | |
795 | 0, /* bitpos */ | |
796 | complain_overflow_signed, /* complain_on_overflow */ | |
797 | mmix_elf_reloc, /* special_function */ | |
798 | "R_MMIX_PUSHJ_STUBBABLE", /* name */ | |
799 | FALSE, /* partial_inplace */ | |
800 | ~0x0100ffff, /* src_mask */ | |
801 | 0x0100ffff, /* dst_mask */ | |
802 | TRUE) /* pcrel_offset */ | |
3c3bdf30 NC |
803 | }; |
804 | ||
805 | ||
806 | /* Map BFD reloc types to MMIX ELF reloc types. */ | |
807 | ||
808 | struct mmix_reloc_map | |
809 | { | |
810 | bfd_reloc_code_real_type bfd_reloc_val; | |
811 | enum elf_mmix_reloc_type elf_reloc_val; | |
812 | }; | |
813 | ||
814 | ||
815 | static const struct mmix_reloc_map mmix_reloc_map[] = | |
816 | { | |
817 | {BFD_RELOC_NONE, R_MMIX_NONE}, | |
818 | {BFD_RELOC_8, R_MMIX_8}, | |
819 | {BFD_RELOC_16, R_MMIX_16}, | |
820 | {BFD_RELOC_24, R_MMIX_24}, | |
821 | {BFD_RELOC_32, R_MMIX_32}, | |
822 | {BFD_RELOC_64, R_MMIX_64}, | |
823 | {BFD_RELOC_8_PCREL, R_MMIX_PC_8}, | |
824 | {BFD_RELOC_16_PCREL, R_MMIX_PC_16}, | |
825 | {BFD_RELOC_24_PCREL, R_MMIX_PC_24}, | |
826 | {BFD_RELOC_32_PCREL, R_MMIX_PC_32}, | |
827 | {BFD_RELOC_64_PCREL, R_MMIX_PC_64}, | |
828 | {BFD_RELOC_VTABLE_INHERIT, R_MMIX_GNU_VTINHERIT}, | |
829 | {BFD_RELOC_VTABLE_ENTRY, R_MMIX_GNU_VTENTRY}, | |
830 | {BFD_RELOC_MMIX_GETA, R_MMIX_GETA}, | |
831 | {BFD_RELOC_MMIX_CBRANCH, R_MMIX_CBRANCH}, | |
832 | {BFD_RELOC_MMIX_PUSHJ, R_MMIX_PUSHJ}, | |
833 | {BFD_RELOC_MMIX_JMP, R_MMIX_JMP}, | |
834 | {BFD_RELOC_MMIX_ADDR19, R_MMIX_ADDR19}, | |
835 | {BFD_RELOC_MMIX_ADDR27, R_MMIX_ADDR27}, | |
836 | {BFD_RELOC_MMIX_REG_OR_BYTE, R_MMIX_REG_OR_BYTE}, | |
837 | {BFD_RELOC_MMIX_REG, R_MMIX_REG}, | |
838 | {BFD_RELOC_MMIX_BASE_PLUS_OFFSET, R_MMIX_BASE_PLUS_OFFSET}, | |
f60ebe14 HPN |
839 | {BFD_RELOC_MMIX_LOCAL, R_MMIX_LOCAL}, |
840 | {BFD_RELOC_MMIX_PUSHJ_STUBBABLE, R_MMIX_PUSHJ_STUBBABLE} | |
3c3bdf30 NC |
841 | }; |
842 | ||
843 | static reloc_howto_type * | |
844 | bfd_elf64_bfd_reloc_type_lookup (abfd, code) | |
845 | bfd *abfd ATTRIBUTE_UNUSED; | |
846 | bfd_reloc_code_real_type code; | |
847 | { | |
848 | unsigned int i; | |
849 | ||
850 | for (i = 0; | |
851 | i < sizeof (mmix_reloc_map) / sizeof (mmix_reloc_map[0]); | |
852 | i++) | |
853 | { | |
854 | if (mmix_reloc_map[i].bfd_reloc_val == code) | |
855 | return &elf_mmix_howto_table[mmix_reloc_map[i].elf_reloc_val]; | |
856 | } | |
857 | ||
858 | return NULL; | |
157090f7 AM |
859 | } |
860 | ||
861 | static reloc_howto_type * | |
862 | bfd_elf64_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
863 | const char *r_name) | |
864 | { | |
865 | unsigned int i; | |
866 | ||
867 | for (i = 0; | |
868 | i < sizeof (elf_mmix_howto_table) / sizeof (elf_mmix_howto_table[0]); | |
869 | i++) | |
870 | if (elf_mmix_howto_table[i].name != NULL | |
871 | && strcasecmp (elf_mmix_howto_table[i].name, r_name) == 0) | |
872 | return &elf_mmix_howto_table[i]; | |
873 | ||
874 | return NULL; | |
3c3bdf30 NC |
875 | } |
876 | ||
f0abc2a1 AM |
877 | static bfd_boolean |
878 | mmix_elf_new_section_hook (abfd, sec) | |
879 | bfd *abfd; | |
880 | asection *sec; | |
881 | { | |
f592407e AM |
882 | if (!sec->used_by_bfd) |
883 | { | |
884 | struct _mmix_elf_section_data *sdata; | |
885 | bfd_size_type amt = sizeof (*sdata); | |
f0abc2a1 | 886 | |
f592407e AM |
887 | sdata = bfd_zalloc (abfd, amt); |
888 | if (sdata == NULL) | |
889 | return FALSE; | |
890 | sec->used_by_bfd = sdata; | |
891 | } | |
f0abc2a1 AM |
892 | |
893 | return _bfd_elf_new_section_hook (abfd, sec); | |
894 | } | |
895 | ||
3c3bdf30 NC |
896 | |
897 | /* This function performs the actual bitfiddling and sanity check for a | |
898 | final relocation. Each relocation gets its *worst*-case expansion | |
899 | in size when it arrives here; any reduction in size should have been | |
900 | caught in linker relaxation earlier. When we get here, the relocation | |
901 | looks like the smallest instruction with SWYM:s (nop:s) appended to the | |
902 | max size. We fill in those nop:s. | |
903 | ||
904 | R_MMIX_GETA: (FIXME: Relaxation should break this up in 1, 2, 3 tetra) | |
905 | GETA $N,foo | |
906 | -> | |
907 | SETL $N,foo & 0xffff | |
908 | INCML $N,(foo >> 16) & 0xffff | |
909 | INCMH $N,(foo >> 32) & 0xffff | |
910 | INCH $N,(foo >> 48) & 0xffff | |
911 | ||
912 | R_MMIX_CBRANCH: (FIXME: Relaxation should break this up, but | |
913 | condbranches needing relaxation might be rare enough to not be | |
914 | worthwhile.) | |
915 | [P]Bcc $N,foo | |
916 | -> | |
917 | [~P]B~cc $N,.+20 | |
918 | SETL $255,foo & ... | |
919 | INCML ... | |
920 | INCMH ... | |
921 | INCH ... | |
922 | GO $255,$255,0 | |
923 | ||
924 | R_MMIX_PUSHJ: (FIXME: Relaxation...) | |
925 | PUSHJ $N,foo | |
926 | -> | |
927 | SETL $255,foo & ... | |
928 | INCML ... | |
929 | INCMH ... | |
930 | INCH ... | |
931 | PUSHGO $N,$255,0 | |
932 | ||
933 | R_MMIX_JMP: (FIXME: Relaxation...) | |
934 | JMP foo | |
935 | -> | |
936 | SETL $255,foo & ... | |
937 | INCML ... | |
938 | INCMH ... | |
939 | INCH ... | |
940 | GO $255,$255,0 | |
941 | ||
942 | R_MMIX_ADDR19 and R_MMIX_ADDR27 are just filled in. */ | |
943 | ||
944 | static bfd_reloc_status_type | |
18978b27 HPN |
945 | mmix_elf_perform_relocation (asection *isec, reloc_howto_type *howto, |
946 | void *datap, bfd_vma addr, bfd_vma value, | |
947 | char **error_message) | |
3c3bdf30 NC |
948 | { |
949 | bfd *abfd = isec->owner; | |
950 | bfd_reloc_status_type flag = bfd_reloc_ok; | |
951 | bfd_reloc_status_type r; | |
952 | int offs = 0; | |
953 | int reg = 255; | |
954 | ||
955 | /* The worst case bits are all similar SETL/INCML/INCMH/INCH sequences. | |
956 | We handle the differences here and the common sequence later. */ | |
957 | switch (howto->type) | |
958 | { | |
959 | case R_MMIX_GETA: | |
960 | offs = 0; | |
961 | reg = bfd_get_8 (abfd, (bfd_byte *) datap + 1); | |
962 | ||
963 | /* We change to an absolute value. */ | |
964 | value += addr; | |
965 | break; | |
966 | ||
967 | case R_MMIX_CBRANCH: | |
968 | { | |
969 | int in1 = bfd_get_16 (abfd, (bfd_byte *) datap) << 16; | |
970 | ||
971 | /* Invert the condition and prediction bit, and set the offset | |
972 | to five instructions ahead. | |
973 | ||
974 | We *can* do better if we want to. If the branch is found to be | |
975 | within limits, we could leave the branch as is; there'll just | |
976 | be a bunch of NOP:s after it. But we shouldn't see this | |
977 | sequence often enough that it's worth doing it. */ | |
978 | ||
979 | bfd_put_32 (abfd, | |
980 | (((in1 ^ ((PRED_INV_BIT | COND_INV_BIT) << 24)) & ~0xffff) | |
981 | | (24/4)), | |
982 | (bfd_byte *) datap); | |
983 | ||
984 | /* Put a "GO $255,$255,0" after the common sequence. */ | |
985 | bfd_put_32 (abfd, | |
986 | ((GO_INSN_BYTE | IMM_OFFSET_BIT) << 24) | 0xffff00, | |
987 | (bfd_byte *) datap + 20); | |
988 | ||
989 | /* Common sequence starts at offset 4. */ | |
990 | offs = 4; | |
991 | ||
992 | /* We change to an absolute value. */ | |
993 | value += addr; | |
994 | } | |
995 | break; | |
996 | ||
f60ebe14 HPN |
997 | case R_MMIX_PUSHJ_STUBBABLE: |
998 | /* If the address fits, we're fine. */ | |
999 | if ((value & 3) == 0 | |
1000 | /* Note rightshift 0; see R_MMIX_JMP case below. */ | |
1001 | && (r = bfd_check_overflow (complain_overflow_signed, | |
1002 | howto->bitsize, | |
1003 | 0, | |
1004 | bfd_arch_bits_per_address (abfd), | |
1005 | value)) == bfd_reloc_ok) | |
1006 | goto pcrel_mmix_reloc_fits; | |
1007 | else | |
1008 | { | |
1a23a9e6 | 1009 | bfd_size_type size = isec->rawsize ? isec->rawsize : isec->size; |
f60ebe14 HPN |
1010 | |
1011 | /* We have the bytes at the PUSHJ insn and need to get the | |
1012 | position for the stub. There's supposed to be room allocated | |
1013 | for the stub. */ | |
1014 | bfd_byte *stubcontents | |
f075ee0c | 1015 | = ((bfd_byte *) datap |
f60ebe14 | 1016 | - (addr - (isec->output_section->vma + isec->output_offset)) |
eea6121a | 1017 | + size |
f60ebe14 HPN |
1018 | + mmix_elf_section_data (isec)->pjs.stub_offset); |
1019 | bfd_vma stubaddr; | |
1020 | ||
18978b27 HPN |
1021 | if (mmix_elf_section_data (isec)->pjs.n_pushj_relocs == 0) |
1022 | { | |
1023 | /* This shouldn't happen when linking to ELF or mmo, so | |
1024 | this is an attempt to link to "binary", right? We | |
1025 | can't access the output bfd, so we can't verify that | |
1026 | assumption. We only know that the critical | |
1027 | mmix_elf_check_common_relocs has not been called, | |
1028 | which happens when the output format is different | |
1029 | from the input format (and is not mmo). */ | |
1030 | if (! mmix_elf_section_data (isec)->has_warned_pushj) | |
1031 | { | |
1032 | /* For the first such error per input section, produce | |
1033 | a verbose message. */ | |
1034 | *error_message | |
1035 | = _("invalid input relocation when producing" | |
1036 | " non-ELF, non-mmo format output." | |
1037 | "\n Please use the objcopy program to convert from" | |
1038 | " ELF or mmo," | |
1039 | "\n or assemble using" | |
1040 | " \"-no-expand\" (for gcc, \"-Wa,-no-expand\""); | |
1041 | mmix_elf_section_data (isec)->has_warned_pushj = TRUE; | |
1042 | return bfd_reloc_dangerous; | |
1043 | } | |
1044 | ||
1045 | /* For subsequent errors, return this one, which is | |
1046 | rate-limited but looks a little bit different, | |
1047 | hopefully without affecting user-friendliness. */ | |
1048 | return bfd_reloc_overflow; | |
1049 | } | |
1050 | ||
f60ebe14 HPN |
1051 | /* The address doesn't fit, so redirect the PUSHJ to the |
1052 | location of the stub. */ | |
1053 | r = mmix_elf_perform_relocation (isec, | |
1054 | &elf_mmix_howto_table | |
1055 | [R_MMIX_ADDR19], | |
1056 | datap, | |
1057 | addr, | |
1058 | isec->output_section->vma | |
1059 | + isec->output_offset | |
eea6121a | 1060 | + size |
f60ebe14 HPN |
1061 | + (mmix_elf_section_data (isec) |
1062 | ->pjs.stub_offset) | |
18978b27 HPN |
1063 | - addr, |
1064 | error_message); | |
f60ebe14 HPN |
1065 | if (r != bfd_reloc_ok) |
1066 | return r; | |
1067 | ||
1068 | stubaddr | |
1069 | = (isec->output_section->vma | |
1070 | + isec->output_offset | |
eea6121a | 1071 | + size |
f60ebe14 HPN |
1072 | + mmix_elf_section_data (isec)->pjs.stub_offset); |
1073 | ||
1074 | /* We generate a simple JMP if that suffices, else the whole 5 | |
1075 | insn stub. */ | |
1076 | if (bfd_check_overflow (complain_overflow_signed, | |
1077 | elf_mmix_howto_table[R_MMIX_ADDR27].bitsize, | |
1078 | 0, | |
1079 | bfd_arch_bits_per_address (abfd), | |
1080 | addr + value - stubaddr) == bfd_reloc_ok) | |
1081 | { | |
1082 | bfd_put_32 (abfd, JMP_INSN_BYTE << 24, stubcontents); | |
1083 | r = mmix_elf_perform_relocation (isec, | |
1084 | &elf_mmix_howto_table | |
1085 | [R_MMIX_ADDR27], | |
1086 | stubcontents, | |
1087 | stubaddr, | |
18978b27 HPN |
1088 | value + addr - stubaddr, |
1089 | error_message); | |
f60ebe14 HPN |
1090 | mmix_elf_section_data (isec)->pjs.stub_offset += 4; |
1091 | ||
eea6121a AM |
1092 | if (size + mmix_elf_section_data (isec)->pjs.stub_offset |
1093 | > isec->size) | |
f60ebe14 HPN |
1094 | abort (); |
1095 | ||
1096 | return r; | |
1097 | } | |
1098 | else | |
1099 | { | |
1100 | /* Put a "GO $255,0" after the common sequence. */ | |
1101 | bfd_put_32 (abfd, | |
1102 | ((GO_INSN_BYTE | IMM_OFFSET_BIT) << 24) | |
1103 | | 0xff00, (bfd_byte *) stubcontents + 16); | |
1104 | ||
1105 | /* Prepare for the general code to set the first part of the | |
1106 | linker stub, and */ | |
1107 | value += addr; | |
1108 | datap = stubcontents; | |
1109 | mmix_elf_section_data (isec)->pjs.stub_offset | |
1110 | += MAX_PUSHJ_STUB_SIZE; | |
1111 | } | |
1112 | } | |
1113 | break; | |
1114 | ||
3c3bdf30 NC |
1115 | case R_MMIX_PUSHJ: |
1116 | { | |
1117 | int inreg = bfd_get_8 (abfd, (bfd_byte *) datap + 1); | |
1118 | ||
1119 | /* Put a "PUSHGO $N,$255,0" after the common sequence. */ | |
1120 | bfd_put_32 (abfd, | |
1121 | ((PUSHGO_INSN_BYTE | IMM_OFFSET_BIT) << 24) | |
1122 | | (inreg << 16) | |
1123 | | 0xff00, | |
1124 | (bfd_byte *) datap + 16); | |
1125 | ||
1126 | /* We change to an absolute value. */ | |
1127 | value += addr; | |
1128 | } | |
1129 | break; | |
1130 | ||
1131 | case R_MMIX_JMP: | |
1132 | /* This one is a little special. If we get here on a non-relaxing | |
1133 | link, and the destination is actually in range, we don't need to | |
1134 | execute the nops. | |
1135 | If so, we fall through to the bit-fiddling relocs. | |
1136 | ||
1137 | FIXME: bfd_check_overflow seems broken; the relocation is | |
1138 | rightshifted before testing, so supply a zero rightshift. */ | |
1139 | ||
1140 | if (! ((value & 3) == 0 | |
1141 | && (r = bfd_check_overflow (complain_overflow_signed, | |
1142 | howto->bitsize, | |
1143 | 0, | |
1144 | bfd_arch_bits_per_address (abfd), | |
1145 | value)) == bfd_reloc_ok)) | |
1146 | { | |
1147 | /* If the relocation doesn't fit in a JMP, we let the NOP:s be | |
1148 | modified below, and put a "GO $255,$255,0" after the | |
1149 | address-loading sequence. */ | |
1150 | bfd_put_32 (abfd, | |
1151 | ((GO_INSN_BYTE | IMM_OFFSET_BIT) << 24) | |
1152 | | 0xffff00, | |
1153 | (bfd_byte *) datap + 16); | |
1154 | ||
1155 | /* We change to an absolute value. */ | |
1156 | value += addr; | |
1157 | break; | |
1158 | } | |
cedb70c5 | 1159 | /* FALLTHROUGH. */ |
3c3bdf30 NC |
1160 | case R_MMIX_ADDR19: |
1161 | case R_MMIX_ADDR27: | |
f60ebe14 | 1162 | pcrel_mmix_reloc_fits: |
3c3bdf30 NC |
1163 | /* These must be in range, or else we emit an error. */ |
1164 | if ((value & 3) == 0 | |
1165 | /* Note rightshift 0; see above. */ | |
1166 | && (r = bfd_check_overflow (complain_overflow_signed, | |
1167 | howto->bitsize, | |
1168 | 0, | |
1169 | bfd_arch_bits_per_address (abfd), | |
1170 | value)) == bfd_reloc_ok) | |
1171 | { | |
1172 | bfd_vma in1 | |
1173 | = bfd_get_32 (abfd, (bfd_byte *) datap); | |
1174 | bfd_vma highbit; | |
1175 | ||
1176 | if ((bfd_signed_vma) value < 0) | |
1177 | { | |
f60ebe14 | 1178 | highbit = 1 << 24; |
3c3bdf30 NC |
1179 | value += (1 << (howto->bitsize - 1)); |
1180 | } | |
1181 | else | |
1182 | highbit = 0; | |
1183 | ||
1184 | value >>= 2; | |
1185 | ||
1186 | bfd_put_32 (abfd, | |
930b4cb2 | 1187 | (in1 & howto->src_mask) |
3c3bdf30 NC |
1188 | | highbit |
1189 | | (value & howto->dst_mask), | |
1190 | (bfd_byte *) datap); | |
1191 | ||
1192 | return bfd_reloc_ok; | |
1193 | } | |
1194 | else | |
1195 | return bfd_reloc_overflow; | |
1196 | ||
930b4cb2 HPN |
1197 | case R_MMIX_BASE_PLUS_OFFSET: |
1198 | { | |
1199 | struct bpo_reloc_section_info *bpodata | |
f0abc2a1 | 1200 | = mmix_elf_section_data (isec)->bpo.reloc; |
18978b27 HPN |
1201 | asection *bpo_greg_section; |
1202 | struct bpo_greg_section_info *gregdata; | |
1203 | size_t bpo_index; | |
1204 | ||
1205 | if (bpodata == NULL) | |
1206 | { | |
1207 | /* This shouldn't happen when linking to ELF or mmo, so | |
1208 | this is an attempt to link to "binary", right? We | |
1209 | can't access the output bfd, so we can't verify that | |
1210 | assumption. We only know that the critical | |
1211 | mmix_elf_check_common_relocs has not been called, which | |
1212 | happens when the output format is different from the | |
1213 | input format (and is not mmo). */ | |
1214 | if (! mmix_elf_section_data (isec)->has_warned_bpo) | |
1215 | { | |
1216 | /* For the first such error per input section, produce | |
1217 | a verbose message. */ | |
1218 | *error_message | |
1219 | = _("invalid input relocation when producing" | |
1220 | " non-ELF, non-mmo format output." | |
1221 | "\n Please use the objcopy program to convert from" | |
1222 | " ELF or mmo," | |
1223 | "\n or compile using the gcc-option" | |
1224 | " \"-mno-base-addresses\"."); | |
1225 | mmix_elf_section_data (isec)->has_warned_bpo = TRUE; | |
1226 | return bfd_reloc_dangerous; | |
1227 | } | |
1228 | ||
1229 | /* For subsequent errors, return this one, which is | |
1230 | rate-limited but looks a little bit different, | |
1231 | hopefully without affecting user-friendliness. */ | |
1232 | return bfd_reloc_overflow; | |
1233 | } | |
1234 | ||
1235 | bpo_greg_section = bpodata->bpo_greg_section; | |
1236 | gregdata = mmix_elf_section_data (bpo_greg_section)->bpo.greg; | |
1237 | bpo_index = gregdata->bpo_reloc_indexes[bpodata->bpo_index++]; | |
930b4cb2 HPN |
1238 | |
1239 | /* A consistency check: The value we now have in "relocation" must | |
1240 | be the same as the value we stored for that relocation. It | |
1241 | doesn't cost much, so can be left in at all times. */ | |
1242 | if (value != gregdata->reloc_request[bpo_index].value) | |
1243 | { | |
1244 | (*_bfd_error_handler) | |
1245 | (_("%s: Internal inconsistency error for value for\n\ | |
1246 | linker-allocated global register: linked: 0x%lx%08lx != relaxed: 0x%lx%08lx\n"), | |
1247 | bfd_get_filename (isec->owner), | |
1248 | (unsigned long) (value >> 32), (unsigned long) value, | |
1249 | (unsigned long) (gregdata->reloc_request[bpo_index].value | |
1250 | >> 32), | |
1251 | (unsigned long) gregdata->reloc_request[bpo_index].value); | |
1252 | bfd_set_error (bfd_error_bad_value); | |
1253 | return bfd_reloc_overflow; | |
1254 | } | |
1255 | ||
1256 | /* Then store the register number and offset for that register | |
1257 | into datap and datap + 1 respectively. */ | |
1258 | bfd_put_8 (abfd, | |
1259 | gregdata->reloc_request[bpo_index].regindex | |
1260 | + bpo_greg_section->output_section->vma / 8, | |
1261 | datap); | |
1262 | bfd_put_8 (abfd, | |
1263 | gregdata->reloc_request[bpo_index].offset, | |
1264 | ((unsigned char *) datap) + 1); | |
1265 | return bfd_reloc_ok; | |
1266 | } | |
1267 | ||
3c3bdf30 NC |
1268 | case R_MMIX_REG_OR_BYTE: |
1269 | case R_MMIX_REG: | |
1270 | if (value > 255) | |
1271 | return bfd_reloc_overflow; | |
1272 | bfd_put_8 (abfd, value, datap); | |
1273 | return bfd_reloc_ok; | |
1274 | ||
1275 | default: | |
1276 | BAD_CASE (howto->type); | |
1277 | } | |
1278 | ||
1279 | /* This code adds the common SETL/INCML/INCMH/INCH worst-case | |
1280 | sequence. */ | |
1281 | ||
1282 | /* Lowest two bits must be 0. We return bfd_reloc_overflow for | |
1283 | everything that looks strange. */ | |
1284 | if (value & 3) | |
1285 | flag = bfd_reloc_overflow; | |
1286 | ||
1287 | bfd_put_32 (abfd, | |
1288 | (SETL_INSN_BYTE << 24) | (value & 0xffff) | (reg << 16), | |
1289 | (bfd_byte *) datap + offs); | |
1290 | bfd_put_32 (abfd, | |
1291 | (INCML_INSN_BYTE << 24) | ((value >> 16) & 0xffff) | (reg << 16), | |
1292 | (bfd_byte *) datap + offs + 4); | |
1293 | bfd_put_32 (abfd, | |
1294 | (INCMH_INSN_BYTE << 24) | ((value >> 32) & 0xffff) | (reg << 16), | |
1295 | (bfd_byte *) datap + offs + 8); | |
1296 | bfd_put_32 (abfd, | |
1297 | (INCH_INSN_BYTE << 24) | ((value >> 48) & 0xffff) | (reg << 16), | |
1298 | (bfd_byte *) datap + offs + 12); | |
1299 | ||
1300 | return flag; | |
1301 | } | |
1302 | ||
1303 | /* Set the howto pointer for an MMIX ELF reloc (type RELA). */ | |
1304 | ||
1305 | static void | |
1306 | mmix_info_to_howto_rela (abfd, cache_ptr, dst) | |
1307 | bfd *abfd ATTRIBUTE_UNUSED; | |
1308 | arelent *cache_ptr; | |
947216bf | 1309 | Elf_Internal_Rela *dst; |
3c3bdf30 NC |
1310 | { |
1311 | unsigned int r_type; | |
1312 | ||
1313 | r_type = ELF64_R_TYPE (dst->r_info); | |
1314 | BFD_ASSERT (r_type < (unsigned int) R_MMIX_max); | |
1315 | cache_ptr->howto = &elf_mmix_howto_table[r_type]; | |
1316 | } | |
1317 | ||
1318 | /* Any MMIX-specific relocation gets here at assembly time or when linking | |
1319 | to other formats (such as mmo); this is the relocation function from | |
1320 | the reloc_table. We don't get here for final pure ELF linking. */ | |
1321 | ||
1322 | static bfd_reloc_status_type | |
1323 | mmix_elf_reloc (abfd, reloc_entry, symbol, data, input_section, | |
1324 | output_bfd, error_message) | |
1325 | bfd *abfd; | |
1326 | arelent *reloc_entry; | |
1327 | asymbol *symbol; | |
1328 | PTR data; | |
1329 | asection *input_section; | |
1330 | bfd *output_bfd; | |
18978b27 | 1331 | char **error_message; |
3c3bdf30 NC |
1332 | { |
1333 | bfd_vma relocation; | |
1334 | bfd_reloc_status_type r; | |
1335 | asection *reloc_target_output_section; | |
1336 | bfd_reloc_status_type flag = bfd_reloc_ok; | |
1337 | bfd_vma output_base = 0; | |
3c3bdf30 NC |
1338 | |
1339 | r = bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, | |
1340 | input_section, output_bfd, error_message); | |
1341 | ||
1342 | /* If that was all that was needed (i.e. this isn't a final link, only | |
1343 | some segment adjustments), we're done. */ | |
1344 | if (r != bfd_reloc_continue) | |
1345 | return r; | |
1346 | ||
1347 | if (bfd_is_und_section (symbol->section) | |
1348 | && (symbol->flags & BSF_WEAK) == 0 | |
1349 | && output_bfd == (bfd *) NULL) | |
1350 | return bfd_reloc_undefined; | |
1351 | ||
1352 | /* Is the address of the relocation really within the section? */ | |
07515404 | 1353 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
3c3bdf30 NC |
1354 | return bfd_reloc_outofrange; |
1355 | ||
4cc11e76 | 1356 | /* Work out which section the relocation is targeted at and the |
3c3bdf30 NC |
1357 | initial relocation command value. */ |
1358 | ||
1359 | /* Get symbol value. (Common symbols are special.) */ | |
1360 | if (bfd_is_com_section (symbol->section)) | |
1361 | relocation = 0; | |
1362 | else | |
1363 | relocation = symbol->value; | |
1364 | ||
1365 | reloc_target_output_section = bfd_get_output_section (symbol); | |
1366 | ||
1367 | /* Here the variable relocation holds the final address of the symbol we | |
1368 | are relocating against, plus any addend. */ | |
1369 | if (output_bfd) | |
1370 | output_base = 0; | |
1371 | else | |
1372 | output_base = reloc_target_output_section->vma; | |
1373 | ||
1374 | relocation += output_base + symbol->section->output_offset; | |
1375 | ||
3c3bdf30 NC |
1376 | if (output_bfd != (bfd *) NULL) |
1377 | { | |
1378 | /* Add in supplied addend. */ | |
1379 | relocation += reloc_entry->addend; | |
1380 | ||
1381 | /* This is a partial relocation, and we want to apply the | |
1382 | relocation to the reloc entry rather than the raw data. | |
1383 | Modify the reloc inplace to reflect what we now know. */ | |
1384 | reloc_entry->addend = relocation; | |
1385 | reloc_entry->address += input_section->output_offset; | |
1386 | return flag; | |
1387 | } | |
1388 | ||
1389 | return mmix_final_link_relocate (reloc_entry->howto, input_section, | |
1390 | data, reloc_entry->address, | |
1391 | reloc_entry->addend, relocation, | |
1392 | bfd_asymbol_name (symbol), | |
18978b27 HPN |
1393 | reloc_target_output_section, |
1394 | error_message); | |
3c3bdf30 | 1395 | } |
e06fcc86 | 1396 | \f |
3c3bdf30 NC |
1397 | /* Relocate an MMIX ELF section. Modified from elf32-fr30.c; look to it |
1398 | for guidance if you're thinking of copying this. */ | |
1399 | ||
b34976b6 | 1400 | static bfd_boolean |
3c3bdf30 NC |
1401 | mmix_elf_relocate_section (output_bfd, info, input_bfd, input_section, |
1402 | contents, relocs, local_syms, local_sections) | |
1403 | bfd *output_bfd ATTRIBUTE_UNUSED; | |
1404 | struct bfd_link_info *info; | |
1405 | bfd *input_bfd; | |
1406 | asection *input_section; | |
1407 | bfd_byte *contents; | |
1408 | Elf_Internal_Rela *relocs; | |
1409 | Elf_Internal_Sym *local_syms; | |
1410 | asection **local_sections; | |
1411 | { | |
1412 | Elf_Internal_Shdr *symtab_hdr; | |
1413 | struct elf_link_hash_entry **sym_hashes; | |
1414 | Elf_Internal_Rela *rel; | |
1415 | Elf_Internal_Rela *relend; | |
1a23a9e6 | 1416 | bfd_size_type size; |
f60ebe14 | 1417 | size_t pjsno = 0; |
3c3bdf30 | 1418 | |
1a23a9e6 | 1419 | size = input_section->rawsize ? input_section->rawsize : input_section->size; |
3c3bdf30 NC |
1420 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
1421 | sym_hashes = elf_sym_hashes (input_bfd); | |
1422 | relend = relocs + input_section->reloc_count; | |
1423 | ||
1a23a9e6 AM |
1424 | /* Zero the stub area before we start. */ |
1425 | if (input_section->rawsize != 0 | |
1426 | && input_section->size > input_section->rawsize) | |
1427 | memset (contents + input_section->rawsize, 0, | |
1428 | input_section->size - input_section->rawsize); | |
1429 | ||
3c3bdf30 NC |
1430 | for (rel = relocs; rel < relend; rel ++) |
1431 | { | |
1432 | reloc_howto_type *howto; | |
1433 | unsigned long r_symndx; | |
1434 | Elf_Internal_Sym *sym; | |
1435 | asection *sec; | |
1436 | struct elf_link_hash_entry *h; | |
1437 | bfd_vma relocation; | |
1438 | bfd_reloc_status_type r; | |
1439 | const char *name = NULL; | |
1440 | int r_type; | |
b34976b6 | 1441 | bfd_boolean undefined_signalled = FALSE; |
3c3bdf30 NC |
1442 | |
1443 | r_type = ELF64_R_TYPE (rel->r_info); | |
1444 | ||
1445 | if (r_type == R_MMIX_GNU_VTINHERIT | |
1446 | || r_type == R_MMIX_GNU_VTENTRY) | |
1447 | continue; | |
1448 | ||
1449 | r_symndx = ELF64_R_SYM (rel->r_info); | |
1450 | ||
ab96bf03 AM |
1451 | howto = elf_mmix_howto_table + ELF64_R_TYPE (rel->r_info); |
1452 | h = NULL; | |
1453 | sym = NULL; | |
1454 | sec = NULL; | |
1455 | ||
1456 | if (r_symndx < symtab_hdr->sh_info) | |
1457 | { | |
1458 | sym = local_syms + r_symndx; | |
1459 | sec = local_sections [r_symndx]; | |
1460 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); | |
1461 | ||
1462 | name = bfd_elf_string_from_elf_section (input_bfd, | |
1463 | symtab_hdr->sh_link, | |
1464 | sym->st_name); | |
1465 | if (name == NULL) | |
1466 | name = bfd_section_name (input_bfd, sec); | |
1467 | } | |
1468 | else | |
1469 | { | |
1470 | bfd_boolean unresolved_reloc; | |
1471 | ||
1472 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, | |
1473 | r_symndx, symtab_hdr, sym_hashes, | |
1474 | h, sec, relocation, | |
1475 | unresolved_reloc, undefined_signalled); | |
1476 | name = h->root.root.string; | |
1477 | } | |
1478 | ||
dbaa2011 | 1479 | if (sec != NULL && discarded_section (sec)) |
e4067dbb | 1480 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
545fd46b | 1481 | rel, 1, relend, howto, 0, contents); |
ab96bf03 | 1482 | |
1049f94e | 1483 | if (info->relocatable) |
3c3bdf30 | 1484 | { |
f60ebe14 HPN |
1485 | /* This is a relocatable link. For most relocs we don't have to |
1486 | change anything, unless the reloc is against a section | |
1487 | symbol, in which case we have to adjust according to where | |
1488 | the section symbol winds up in the output section. */ | |
ab96bf03 AM |
1489 | if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
1490 | rel->r_addend += sec->output_offset; | |
3c3bdf30 | 1491 | |
f60ebe14 HPN |
1492 | /* For PUSHJ stub relocs however, we may need to change the |
1493 | reloc and the section contents, if the reloc doesn't reach | |
1494 | beyond the end of the output section and previous stubs. | |
1495 | Then we change the section contents to be a PUSHJ to the end | |
1496 | of the input section plus stubs (we can do that without using | |
1497 | a reloc), and then we change the reloc to be a R_MMIX_PUSHJ | |
1498 | at the stub location. */ | |
1499 | if (r_type == R_MMIX_PUSHJ_STUBBABLE) | |
1500 | { | |
1501 | /* We've already checked whether we need a stub; use that | |
1502 | knowledge. */ | |
1503 | if (mmix_elf_section_data (input_section)->pjs.stub_size[pjsno] | |
1504 | != 0) | |
1505 | { | |
1506 | Elf_Internal_Rela relcpy; | |
1507 | ||
1508 | if (mmix_elf_section_data (input_section) | |
1509 | ->pjs.stub_size[pjsno] != MAX_PUSHJ_STUB_SIZE) | |
1510 | abort (); | |
1511 | ||
1512 | /* There's already a PUSHJ insn there, so just fill in | |
1513 | the offset bits to the stub. */ | |
1514 | if (mmix_final_link_relocate (elf_mmix_howto_table | |
1515 | + R_MMIX_ADDR19, | |
1516 | input_section, | |
1517 | contents, | |
1518 | rel->r_offset, | |
1519 | 0, | |
1520 | input_section | |
1521 | ->output_section->vma | |
1522 | + input_section->output_offset | |
eea6121a | 1523 | + size |
f60ebe14 HPN |
1524 | + mmix_elf_section_data (input_section) |
1525 | ->pjs.stub_offset, | |
18978b27 | 1526 | NULL, NULL, NULL) != bfd_reloc_ok) |
f60ebe14 HPN |
1527 | return FALSE; |
1528 | ||
1529 | /* Put a JMP insn at the stub; it goes with the | |
1530 | R_MMIX_JMP reloc. */ | |
1531 | bfd_put_32 (output_bfd, JMP_INSN_BYTE << 24, | |
1532 | contents | |
eea6121a | 1533 | + size |
f60ebe14 HPN |
1534 | + mmix_elf_section_data (input_section) |
1535 | ->pjs.stub_offset); | |
1536 | ||
1537 | /* Change the reloc to be at the stub, and to a full | |
1538 | R_MMIX_JMP reloc. */ | |
1539 | rel->r_info = ELF64_R_INFO (r_symndx, R_MMIX_JMP); | |
1540 | rel->r_offset | |
eea6121a | 1541 | = (size |
f60ebe14 HPN |
1542 | + mmix_elf_section_data (input_section) |
1543 | ->pjs.stub_offset); | |
1544 | ||
1545 | mmix_elf_section_data (input_section)->pjs.stub_offset | |
1546 | += MAX_PUSHJ_STUB_SIZE; | |
1547 | ||
1548 | /* Shift this reloc to the end of the relocs to maintain | |
1549 | the r_offset sorted reloc order. */ | |
1550 | relcpy = *rel; | |
1551 | memmove (rel, rel + 1, (char *) relend - (char *) rel); | |
1552 | relend[-1] = relcpy; | |
1553 | ||
1554 | /* Back up one reloc, or else we'd skip the next reloc | |
1555 | in turn. */ | |
1556 | rel--; | |
1557 | } | |
1558 | ||
1559 | pjsno++; | |
1560 | } | |
3c3bdf30 NC |
1561 | continue; |
1562 | } | |
1563 | ||
3c3bdf30 NC |
1564 | r = mmix_final_link_relocate (howto, input_section, |
1565 | contents, rel->r_offset, | |
18978b27 | 1566 | rel->r_addend, relocation, name, sec, NULL); |
3c3bdf30 NC |
1567 | |
1568 | if (r != bfd_reloc_ok) | |
1569 | { | |
b34976b6 | 1570 | bfd_boolean check_ok = TRUE; |
3c3bdf30 NC |
1571 | const char * msg = (const char *) NULL; |
1572 | ||
1573 | switch (r) | |
1574 | { | |
1575 | case bfd_reloc_overflow: | |
1576 | check_ok = info->callbacks->reloc_overflow | |
dfeffb9f L |
1577 | (info, (h ? &h->root : NULL), name, howto->name, |
1578 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
3c3bdf30 NC |
1579 | break; |
1580 | ||
1581 | case bfd_reloc_undefined: | |
1582 | /* We may have sent this message above. */ | |
1583 | if (! undefined_signalled) | |
1584 | check_ok = info->callbacks->undefined_symbol | |
1585 | (info, name, input_bfd, input_section, rel->r_offset, | |
b34976b6 AM |
1586 | TRUE); |
1587 | undefined_signalled = TRUE; | |
3c3bdf30 NC |
1588 | break; |
1589 | ||
1590 | case bfd_reloc_outofrange: | |
1591 | msg = _("internal error: out of range error"); | |
1592 | break; | |
1593 | ||
1594 | case bfd_reloc_notsupported: | |
1595 | msg = _("internal error: unsupported relocation error"); | |
1596 | break; | |
1597 | ||
1598 | case bfd_reloc_dangerous: | |
1599 | msg = _("internal error: dangerous relocation"); | |
1600 | break; | |
1601 | ||
1602 | default: | |
1603 | msg = _("internal error: unknown error"); | |
1604 | break; | |
1605 | } | |
1606 | ||
1607 | if (msg) | |
1608 | check_ok = info->callbacks->warning | |
1609 | (info, msg, name, input_bfd, input_section, rel->r_offset); | |
1610 | ||
1611 | if (! check_ok) | |
b34976b6 | 1612 | return FALSE; |
3c3bdf30 NC |
1613 | } |
1614 | } | |
1615 | ||
b34976b6 | 1616 | return TRUE; |
3c3bdf30 | 1617 | } |
e06fcc86 | 1618 | \f |
3c3bdf30 NC |
1619 | /* Perform a single relocation. By default we use the standard BFD |
1620 | routines. A few relocs we have to do ourselves. */ | |
1621 | ||
1622 | static bfd_reloc_status_type | |
18978b27 HPN |
1623 | mmix_final_link_relocate (reloc_howto_type *howto, asection *input_section, |
1624 | bfd_byte *contents, bfd_vma r_offset, | |
1625 | bfd_signed_vma r_addend, bfd_vma relocation, | |
1626 | const char *symname, asection *symsec, | |
1627 | char **error_message) | |
3c3bdf30 NC |
1628 | { |
1629 | bfd_reloc_status_type r = bfd_reloc_ok; | |
1630 | bfd_vma addr | |
1631 | = (input_section->output_section->vma | |
1632 | + input_section->output_offset | |
1633 | + r_offset); | |
1634 | bfd_signed_vma srel | |
1635 | = (bfd_signed_vma) relocation + r_addend; | |
1636 | ||
1637 | switch (howto->type) | |
1638 | { | |
1639 | /* All these are PC-relative. */ | |
f60ebe14 | 1640 | case R_MMIX_PUSHJ_STUBBABLE: |
3c3bdf30 NC |
1641 | case R_MMIX_PUSHJ: |
1642 | case R_MMIX_CBRANCH: | |
1643 | case R_MMIX_ADDR19: | |
1644 | case R_MMIX_GETA: | |
1645 | case R_MMIX_ADDR27: | |
1646 | case R_MMIX_JMP: | |
1647 | contents += r_offset; | |
1648 | ||
1649 | srel -= (input_section->output_section->vma | |
1650 | + input_section->output_offset | |
1651 | + r_offset); | |
1652 | ||
1653 | r = mmix_elf_perform_relocation (input_section, howto, contents, | |
18978b27 | 1654 | addr, srel, error_message); |
3c3bdf30 NC |
1655 | break; |
1656 | ||
930b4cb2 HPN |
1657 | case R_MMIX_BASE_PLUS_OFFSET: |
1658 | if (symsec == NULL) | |
1659 | return bfd_reloc_undefined; | |
1660 | ||
1661 | /* Check that we're not relocating against a register symbol. */ | |
1662 | if (strcmp (bfd_get_section_name (symsec->owner, symsec), | |
1663 | MMIX_REG_CONTENTS_SECTION_NAME) == 0 | |
1664 | || strcmp (bfd_get_section_name (symsec->owner, symsec), | |
1665 | MMIX_REG_SECTION_NAME) == 0) | |
1666 | { | |
1667 | /* Note: This is separated out into two messages in order | |
1668 | to ease the translation into other languages. */ | |
1669 | if (symname == NULL || *symname == 0) | |
1670 | (*_bfd_error_handler) | |
1671 | (_("%s: base-plus-offset relocation against register symbol: (unknown) in %s"), | |
1672 | bfd_get_filename (input_section->owner), | |
1673 | bfd_get_section_name (symsec->owner, symsec)); | |
1674 | else | |
1675 | (*_bfd_error_handler) | |
1676 | (_("%s: base-plus-offset relocation against register symbol: %s in %s"), | |
1677 | bfd_get_filename (input_section->owner), symname, | |
1678 | bfd_get_section_name (symsec->owner, symsec)); | |
1679 | return bfd_reloc_overflow; | |
1680 | } | |
1681 | goto do_mmix_reloc; | |
1682 | ||
3c3bdf30 NC |
1683 | case R_MMIX_REG_OR_BYTE: |
1684 | case R_MMIX_REG: | |
1685 | /* For now, we handle these alike. They must refer to an register | |
1686 | symbol, which is either relative to the register section and in | |
1687 | the range 0..255, or is in the register contents section with vma | |
1688 | regno * 8. */ | |
1689 | ||
1690 | /* FIXME: A better way to check for reg contents section? | |
1691 | FIXME: Postpone section->scaling to mmix_elf_perform_relocation? */ | |
1692 | if (symsec == NULL) | |
1693 | return bfd_reloc_undefined; | |
1694 | ||
1695 | if (strcmp (bfd_get_section_name (symsec->owner, symsec), | |
1696 | MMIX_REG_CONTENTS_SECTION_NAME) == 0) | |
1697 | { | |
1698 | if ((srel & 7) != 0 || srel < 32*8 || srel > 255*8) | |
1699 | { | |
1700 | /* The bfd_reloc_outofrange return value, though intuitively | |
1701 | a better value, will not get us an error. */ | |
1702 | return bfd_reloc_overflow; | |
1703 | } | |
1704 | srel /= 8; | |
1705 | } | |
1706 | else if (strcmp (bfd_get_section_name (symsec->owner, symsec), | |
1707 | MMIX_REG_SECTION_NAME) == 0) | |
1708 | { | |
1709 | if (srel < 0 || srel > 255) | |
1710 | /* The bfd_reloc_outofrange return value, though intuitively a | |
1711 | better value, will not get us an error. */ | |
1712 | return bfd_reloc_overflow; | |
1713 | } | |
1714 | else | |
1715 | { | |
930b4cb2 | 1716 | /* Note: This is separated out into two messages in order |
ca09e32b NC |
1717 | to ease the translation into other languages. */ |
1718 | if (symname == NULL || *symname == 0) | |
1719 | (*_bfd_error_handler) | |
1720 | (_("%s: register relocation against non-register symbol: (unknown) in %s"), | |
1721 | bfd_get_filename (input_section->owner), | |
1722 | bfd_get_section_name (symsec->owner, symsec)); | |
1723 | else | |
1724 | (*_bfd_error_handler) | |
1725 | (_("%s: register relocation against non-register symbol: %s in %s"), | |
1726 | bfd_get_filename (input_section->owner), symname, | |
1727 | bfd_get_section_name (symsec->owner, symsec)); | |
3c3bdf30 NC |
1728 | |
1729 | /* The bfd_reloc_outofrange return value, though intuitively a | |
1730 | better value, will not get us an error. */ | |
1731 | return bfd_reloc_overflow; | |
1732 | } | |
930b4cb2 | 1733 | do_mmix_reloc: |
3c3bdf30 NC |
1734 | contents += r_offset; |
1735 | r = mmix_elf_perform_relocation (input_section, howto, contents, | |
18978b27 | 1736 | addr, srel, error_message); |
3c3bdf30 NC |
1737 | break; |
1738 | ||
1739 | case R_MMIX_LOCAL: | |
1740 | /* This isn't a real relocation, it's just an assertion that the | |
1741 | final relocation value corresponds to a local register. We | |
1742 | ignore the actual relocation; nothing is changed. */ | |
1743 | { | |
1744 | asection *regsec | |
1745 | = bfd_get_section_by_name (input_section->output_section->owner, | |
1746 | MMIX_REG_CONTENTS_SECTION_NAME); | |
1747 | bfd_vma first_global; | |
1748 | ||
1749 | /* Check that this is an absolute value, or a reference to the | |
1750 | register contents section or the register (symbol) section. | |
1751 | Absolute numbers can get here as undefined section. Undefined | |
1752 | symbols are signalled elsewhere, so there's no conflict in us | |
1753 | accidentally handling it. */ | |
1754 | if (!bfd_is_abs_section (symsec) | |
1755 | && !bfd_is_und_section (symsec) | |
1756 | && strcmp (bfd_get_section_name (symsec->owner, symsec), | |
1757 | MMIX_REG_CONTENTS_SECTION_NAME) != 0 | |
1758 | && strcmp (bfd_get_section_name (symsec->owner, symsec), | |
1759 | MMIX_REG_SECTION_NAME) != 0) | |
1760 | { | |
1761 | (*_bfd_error_handler) | |
1762 | (_("%s: directive LOCAL valid only with a register or absolute value"), | |
1763 | bfd_get_filename (input_section->owner)); | |
1764 | ||
1765 | return bfd_reloc_overflow; | |
1766 | } | |
1767 | ||
1768 | /* If we don't have a register contents section, then $255 is the | |
1769 | first global register. */ | |
1770 | if (regsec == NULL) | |
1771 | first_global = 255; | |
1772 | else | |
1773 | { | |
a0f49396 NC |
1774 | first_global |
1775 | = bfd_get_section_vma (input_section->output_section->owner, | |
1776 | regsec) / 8; | |
3c3bdf30 NC |
1777 | if (strcmp (bfd_get_section_name (symsec->owner, symsec), |
1778 | MMIX_REG_CONTENTS_SECTION_NAME) == 0) | |
1779 | { | |
1780 | if ((srel & 7) != 0 || srel < 32*8 || srel > 255*8) | |
1781 | /* The bfd_reloc_outofrange return value, though | |
1782 | intuitively a better value, will not get us an error. */ | |
1783 | return bfd_reloc_overflow; | |
1784 | srel /= 8; | |
1785 | } | |
1786 | } | |
1787 | ||
1788 | if ((bfd_vma) srel >= first_global) | |
1789 | { | |
1790 | /* FIXME: Better error message. */ | |
1791 | (*_bfd_error_handler) | |
1792 | (_("%s: LOCAL directive: Register $%ld is not a local register. First global register is $%ld."), | |
1793 | bfd_get_filename (input_section->owner), (long) srel, (long) first_global); | |
1794 | ||
1795 | return bfd_reloc_overflow; | |
1796 | } | |
1797 | } | |
1798 | r = bfd_reloc_ok; | |
1799 | break; | |
1800 | ||
1801 | default: | |
1802 | r = _bfd_final_link_relocate (howto, input_section->owner, input_section, | |
1803 | contents, r_offset, | |
1804 | relocation, r_addend); | |
1805 | } | |
1806 | ||
1807 | return r; | |
1808 | } | |
e06fcc86 | 1809 | \f |
3c3bdf30 NC |
1810 | /* Return the section that should be marked against GC for a given |
1811 | relocation. */ | |
1812 | ||
1813 | static asection * | |
07adf181 AM |
1814 | mmix_elf_gc_mark_hook (asection *sec, |
1815 | struct bfd_link_info *info, | |
1816 | Elf_Internal_Rela *rel, | |
1817 | struct elf_link_hash_entry *h, | |
1818 | Elf_Internal_Sym *sym) | |
3c3bdf30 NC |
1819 | { |
1820 | if (h != NULL) | |
07adf181 AM |
1821 | switch (ELF64_R_TYPE (rel->r_info)) |
1822 | { | |
1823 | case R_MMIX_GNU_VTINHERIT: | |
1824 | case R_MMIX_GNU_VTENTRY: | |
1825 | return NULL; | |
1826 | } | |
3c3bdf30 | 1827 | |
07adf181 | 1828 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
3c3bdf30 | 1829 | } |
930b4cb2 HPN |
1830 | |
1831 | /* Update relocation info for a GC-excluded section. We could supposedly | |
1832 | perform the allocation after GC, but there's no suitable hook between | |
1833 | GC (or section merge) and the point when all input sections must be | |
1834 | present. Better to waste some memory and (perhaps) a little time. */ | |
1835 | ||
b34976b6 | 1836 | static bfd_boolean |
07adf181 AM |
1837 | mmix_elf_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED, |
1838 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
1839 | asection *sec, | |
1840 | const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED) | |
930b4cb2 HPN |
1841 | { |
1842 | struct bpo_reloc_section_info *bpodata | |
f0abc2a1 | 1843 | = mmix_elf_section_data (sec)->bpo.reloc; |
930b4cb2 HPN |
1844 | asection *allocated_gregs_section; |
1845 | ||
1846 | /* If no bpodata here, we have nothing to do. */ | |
1847 | if (bpodata == NULL) | |
b34976b6 | 1848 | return TRUE; |
930b4cb2 HPN |
1849 | |
1850 | allocated_gregs_section = bpodata->bpo_greg_section; | |
1851 | ||
f0abc2a1 | 1852 | mmix_elf_section_data (allocated_gregs_section)->bpo.greg->n_bpo_relocs |
930b4cb2 HPN |
1853 | -= bpodata->n_bpo_relocs_this_section; |
1854 | ||
b34976b6 | 1855 | return TRUE; |
930b4cb2 | 1856 | } |
e06fcc86 | 1857 | \f |
3c3bdf30 NC |
1858 | /* Sort register relocs to come before expanding relocs. */ |
1859 | ||
1860 | static int | |
1861 | mmix_elf_sort_relocs (p1, p2) | |
1862 | const PTR p1; | |
1863 | const PTR p2; | |
1864 | { | |
1865 | const Elf_Internal_Rela *r1 = (const Elf_Internal_Rela *) p1; | |
1866 | const Elf_Internal_Rela *r2 = (const Elf_Internal_Rela *) p2; | |
1867 | int r1_is_reg, r2_is_reg; | |
1868 | ||
1869 | /* Sort primarily on r_offset & ~3, so relocs are done to consecutive | |
1870 | insns. */ | |
1871 | if ((r1->r_offset & ~(bfd_vma) 3) > (r2->r_offset & ~(bfd_vma) 3)) | |
1872 | return 1; | |
1873 | else if ((r1->r_offset & ~(bfd_vma) 3) < (r2->r_offset & ~(bfd_vma) 3)) | |
1874 | return -1; | |
1875 | ||
1876 | r1_is_reg | |
1877 | = (ELF64_R_TYPE (r1->r_info) == R_MMIX_REG_OR_BYTE | |
1878 | || ELF64_R_TYPE (r1->r_info) == R_MMIX_REG); | |
1879 | r2_is_reg | |
1880 | = (ELF64_R_TYPE (r2->r_info) == R_MMIX_REG_OR_BYTE | |
1881 | || ELF64_R_TYPE (r2->r_info) == R_MMIX_REG); | |
1882 | if (r1_is_reg != r2_is_reg) | |
1883 | return r2_is_reg - r1_is_reg; | |
1884 | ||
1885 | /* Neither or both are register relocs. Then sort on full offset. */ | |
1886 | if (r1->r_offset > r2->r_offset) | |
1887 | return 1; | |
1888 | else if (r1->r_offset < r2->r_offset) | |
1889 | return -1; | |
1890 | return 0; | |
1891 | } | |
1892 | ||
930b4cb2 HPN |
1893 | /* Subset of mmix_elf_check_relocs, common to ELF and mmo linking. */ |
1894 | ||
b34976b6 | 1895 | static bfd_boolean |
930b4cb2 HPN |
1896 | mmix_elf_check_common_relocs (abfd, info, sec, relocs) |
1897 | bfd *abfd; | |
1898 | struct bfd_link_info *info; | |
1899 | asection *sec; | |
1900 | const Elf_Internal_Rela *relocs; | |
1901 | { | |
1902 | bfd *bpo_greg_owner = NULL; | |
1903 | asection *allocated_gregs_section = NULL; | |
1904 | struct bpo_greg_section_info *gregdata = NULL; | |
1905 | struct bpo_reloc_section_info *bpodata = NULL; | |
1906 | const Elf_Internal_Rela *rel; | |
1907 | const Elf_Internal_Rela *rel_end; | |
1908 | ||
930b4cb2 HPN |
1909 | /* We currently have to abuse this COFF-specific member, since there's |
1910 | no target-machine-dedicated member. There's no alternative outside | |
1911 | the bfd_link_info struct; we can't specialize a hash-table since | |
1912 | they're different between ELF and mmo. */ | |
1913 | bpo_greg_owner = (bfd *) info->base_file; | |
1914 | ||
1915 | rel_end = relocs + sec->reloc_count; | |
1916 | for (rel = relocs; rel < rel_end; rel++) | |
1917 | { | |
1918 | switch (ELF64_R_TYPE (rel->r_info)) | |
1919 | { | |
1920 | /* This relocation causes a GREG allocation. We need to count | |
1921 | them, and we need to create a section for them, so we need an | |
1922 | object to fake as the owner of that section. We can't use | |
1923 | the ELF dynobj for this, since the ELF bits assume lots of | |
1924 | DSO-related stuff if that member is non-NULL. */ | |
1925 | case R_MMIX_BASE_PLUS_OFFSET: | |
f60ebe14 HPN |
1926 | /* We don't do anything with this reloc for a relocatable link. */ |
1927 | if (info->relocatable) | |
1928 | break; | |
1929 | ||
930b4cb2 HPN |
1930 | if (bpo_greg_owner == NULL) |
1931 | { | |
1932 | bpo_greg_owner = abfd; | |
1933 | info->base_file = (PTR) bpo_greg_owner; | |
1934 | } | |
1935 | ||
4fa5c2a8 HPN |
1936 | if (allocated_gregs_section == NULL) |
1937 | allocated_gregs_section | |
1938 | = bfd_get_section_by_name (bpo_greg_owner, | |
1939 | MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME); | |
1940 | ||
930b4cb2 HPN |
1941 | if (allocated_gregs_section == NULL) |
1942 | { | |
1943 | allocated_gregs_section | |
3496cb2a L |
1944 | = bfd_make_section_with_flags (bpo_greg_owner, |
1945 | MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME, | |
1946 | (SEC_HAS_CONTENTS | |
1947 | | SEC_IN_MEMORY | |
1948 | | SEC_LINKER_CREATED)); | |
930b4cb2 HPN |
1949 | /* Setting both SEC_ALLOC and SEC_LOAD means the section is |
1950 | treated like any other section, and we'd get errors for | |
1951 | address overlap with the text section. Let's set none of | |
1952 | those flags, as that is what currently happens for usual | |
1953 | GREG allocations, and that works. */ | |
1954 | if (allocated_gregs_section == NULL | |
930b4cb2 HPN |
1955 | || !bfd_set_section_alignment (bpo_greg_owner, |
1956 | allocated_gregs_section, | |
1957 | 3)) | |
b34976b6 | 1958 | return FALSE; |
930b4cb2 HPN |
1959 | |
1960 | gregdata = (struct bpo_greg_section_info *) | |
1961 | bfd_zalloc (bpo_greg_owner, sizeof (struct bpo_greg_section_info)); | |
1962 | if (gregdata == NULL) | |
b34976b6 | 1963 | return FALSE; |
f0abc2a1 AM |
1964 | mmix_elf_section_data (allocated_gregs_section)->bpo.greg |
1965 | = gregdata; | |
930b4cb2 HPN |
1966 | } |
1967 | else if (gregdata == NULL) | |
f0abc2a1 AM |
1968 | gregdata |
1969 | = mmix_elf_section_data (allocated_gregs_section)->bpo.greg; | |
930b4cb2 HPN |
1970 | |
1971 | /* Get ourselves some auxiliary info for the BPO-relocs. */ | |
1972 | if (bpodata == NULL) | |
1973 | { | |
1974 | /* No use doing a separate iteration pass to find the upper | |
1975 | limit - just use the number of relocs. */ | |
1976 | bpodata = (struct bpo_reloc_section_info *) | |
1977 | bfd_alloc (bpo_greg_owner, | |
1978 | sizeof (struct bpo_reloc_section_info) | |
1979 | * (sec->reloc_count + 1)); | |
1980 | if (bpodata == NULL) | |
b34976b6 | 1981 | return FALSE; |
f0abc2a1 | 1982 | mmix_elf_section_data (sec)->bpo.reloc = bpodata; |
930b4cb2 HPN |
1983 | bpodata->first_base_plus_offset_reloc |
1984 | = bpodata->bpo_index | |
1985 | = gregdata->n_max_bpo_relocs; | |
1986 | bpodata->bpo_greg_section | |
1987 | = allocated_gregs_section; | |
4fa5c2a8 | 1988 | bpodata->n_bpo_relocs_this_section = 0; |
930b4cb2 HPN |
1989 | } |
1990 | ||
1991 | bpodata->n_bpo_relocs_this_section++; | |
1992 | gregdata->n_max_bpo_relocs++; | |
1993 | ||
1994 | /* We don't get another chance to set this before GC; we've not | |
f60ebe14 | 1995 | set up any hook that runs before GC. */ |
930b4cb2 HPN |
1996 | gregdata->n_bpo_relocs |
1997 | = gregdata->n_max_bpo_relocs; | |
1998 | break; | |
f60ebe14 HPN |
1999 | |
2000 | case R_MMIX_PUSHJ_STUBBABLE: | |
2001 | mmix_elf_section_data (sec)->pjs.n_pushj_relocs++; | |
2002 | break; | |
930b4cb2 HPN |
2003 | } |
2004 | } | |
2005 | ||
f60ebe14 HPN |
2006 | /* Allocate per-reloc stub storage and initialize it to the max stub |
2007 | size. */ | |
2008 | if (mmix_elf_section_data (sec)->pjs.n_pushj_relocs != 0) | |
2009 | { | |
2010 | size_t i; | |
2011 | ||
2012 | mmix_elf_section_data (sec)->pjs.stub_size | |
2013 | = bfd_alloc (abfd, mmix_elf_section_data (sec)->pjs.n_pushj_relocs | |
2014 | * sizeof (mmix_elf_section_data (sec) | |
2015 | ->pjs.stub_size[0])); | |
2016 | if (mmix_elf_section_data (sec)->pjs.stub_size == NULL) | |
2017 | return FALSE; | |
2018 | ||
2019 | for (i = 0; i < mmix_elf_section_data (sec)->pjs.n_pushj_relocs; i++) | |
2020 | mmix_elf_section_data (sec)->pjs.stub_size[i] = MAX_PUSHJ_STUB_SIZE; | |
2021 | } | |
2022 | ||
b34976b6 | 2023 | return TRUE; |
930b4cb2 HPN |
2024 | } |
2025 | ||
3c3bdf30 NC |
2026 | /* Look through the relocs for a section during the first phase. */ |
2027 | ||
b34976b6 | 2028 | static bfd_boolean |
3c3bdf30 NC |
2029 | mmix_elf_check_relocs (abfd, info, sec, relocs) |
2030 | bfd *abfd; | |
2031 | struct bfd_link_info *info; | |
2032 | asection *sec; | |
2033 | const Elf_Internal_Rela *relocs; | |
2034 | { | |
2035 | Elf_Internal_Shdr *symtab_hdr; | |
5582a088 | 2036 | struct elf_link_hash_entry **sym_hashes; |
3c3bdf30 NC |
2037 | const Elf_Internal_Rela *rel; |
2038 | const Elf_Internal_Rela *rel_end; | |
2039 | ||
3c3bdf30 NC |
2040 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
2041 | sym_hashes = elf_sym_hashes (abfd); | |
3c3bdf30 NC |
2042 | |
2043 | /* First we sort the relocs so that any register relocs come before | |
2044 | expansion-relocs to the same insn. FIXME: Not done for mmo. */ | |
2045 | qsort ((PTR) relocs, sec->reloc_count, sizeof (Elf_Internal_Rela), | |
2046 | mmix_elf_sort_relocs); | |
2047 | ||
930b4cb2 HPN |
2048 | /* Do the common part. */ |
2049 | if (!mmix_elf_check_common_relocs (abfd, info, sec, relocs)) | |
b34976b6 | 2050 | return FALSE; |
930b4cb2 | 2051 | |
f60ebe14 HPN |
2052 | if (info->relocatable) |
2053 | return TRUE; | |
2054 | ||
3c3bdf30 NC |
2055 | rel_end = relocs + sec->reloc_count; |
2056 | for (rel = relocs; rel < rel_end; rel++) | |
2057 | { | |
2058 | struct elf_link_hash_entry *h; | |
2059 | unsigned long r_symndx; | |
2060 | ||
2061 | r_symndx = ELF64_R_SYM (rel->r_info); | |
2062 | if (r_symndx < symtab_hdr->sh_info) | |
2063 | h = NULL; | |
2064 | else | |
973a3492 L |
2065 | { |
2066 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
2067 | while (h->root.type == bfd_link_hash_indirect | |
2068 | || h->root.type == bfd_link_hash_warning) | |
2069 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2070 | } | |
3c3bdf30 NC |
2071 | |
2072 | switch (ELF64_R_TYPE (rel->r_info)) | |
930b4cb2 | 2073 | { |
3c3bdf30 NC |
2074 | /* This relocation describes the C++ object vtable hierarchy. |
2075 | Reconstruct it for later use during GC. */ | |
2076 | case R_MMIX_GNU_VTINHERIT: | |
c152c796 | 2077 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
b34976b6 | 2078 | return FALSE; |
3c3bdf30 NC |
2079 | break; |
2080 | ||
2081 | /* This relocation describes which C++ vtable entries are actually | |
2082 | used. Record for later use during GC. */ | |
2083 | case R_MMIX_GNU_VTENTRY: | |
d17e0c6e JB |
2084 | BFD_ASSERT (h != NULL); |
2085 | if (h != NULL | |
2086 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
b34976b6 | 2087 | return FALSE; |
3c3bdf30 | 2088 | break; |
930b4cb2 HPN |
2089 | } |
2090 | } | |
2091 | ||
b34976b6 | 2092 | return TRUE; |
930b4cb2 HPN |
2093 | } |
2094 | ||
2095 | /* Wrapper for mmix_elf_check_common_relocs, called when linking to mmo. | |
2096 | Copied from elf_link_add_object_symbols. */ | |
2097 | ||
b34976b6 | 2098 | bfd_boolean |
930b4cb2 HPN |
2099 | _bfd_mmix_check_all_relocs (abfd, info) |
2100 | bfd *abfd; | |
2101 | struct bfd_link_info *info; | |
2102 | { | |
2103 | asection *o; | |
2104 | ||
2105 | for (o = abfd->sections; o != NULL; o = o->next) | |
2106 | { | |
2107 | Elf_Internal_Rela *internal_relocs; | |
b34976b6 | 2108 | bfd_boolean ok; |
930b4cb2 HPN |
2109 | |
2110 | if ((o->flags & SEC_RELOC) == 0 | |
2111 | || o->reloc_count == 0 | |
2112 | || ((info->strip == strip_all || info->strip == strip_debugger) | |
2113 | && (o->flags & SEC_DEBUGGING) != 0) | |
2114 | || bfd_is_abs_section (o->output_section)) | |
2115 | continue; | |
2116 | ||
2117 | internal_relocs | |
45d6a902 AM |
2118 | = _bfd_elf_link_read_relocs (abfd, o, (PTR) NULL, |
2119 | (Elf_Internal_Rela *) NULL, | |
2120 | info->keep_memory); | |
930b4cb2 | 2121 | if (internal_relocs == NULL) |
b34976b6 | 2122 | return FALSE; |
930b4cb2 HPN |
2123 | |
2124 | ok = mmix_elf_check_common_relocs (abfd, info, o, internal_relocs); | |
2125 | ||
2126 | if (! info->keep_memory) | |
2127 | free (internal_relocs); | |
2128 | ||
2129 | if (! ok) | |
b34976b6 | 2130 | return FALSE; |
3c3bdf30 NC |
2131 | } |
2132 | ||
b34976b6 | 2133 | return TRUE; |
3c3bdf30 | 2134 | } |
e06fcc86 | 2135 | \f |
3c3bdf30 NC |
2136 | /* Change symbols relative to the reg contents section to instead be to |
2137 | the register section, and scale them down to correspond to the register | |
2138 | number. */ | |
2139 | ||
6e0b88f1 | 2140 | static int |
754021d0 | 2141 | mmix_elf_link_output_symbol_hook (info, name, sym, input_sec, h) |
3c3bdf30 NC |
2142 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
2143 | const char *name ATTRIBUTE_UNUSED; | |
2144 | Elf_Internal_Sym *sym; | |
2145 | asection *input_sec; | |
754021d0 | 2146 | struct elf_link_hash_entry *h ATTRIBUTE_UNUSED; |
3c3bdf30 NC |
2147 | { |
2148 | if (input_sec != NULL | |
2149 | && input_sec->name != NULL | |
2150 | && ELF_ST_TYPE (sym->st_info) != STT_SECTION | |
2151 | && strcmp (input_sec->name, MMIX_REG_CONTENTS_SECTION_NAME) == 0) | |
2152 | { | |
2153 | sym->st_value /= 8; | |
2154 | sym->st_shndx = SHN_REGISTER; | |
2155 | } | |
2156 | ||
6e0b88f1 | 2157 | return 1; |
3c3bdf30 NC |
2158 | } |
2159 | ||
2160 | /* We fake a register section that holds values that are register numbers. | |
2161 | Having a SHN_REGISTER and register section translates better to other | |
2162 | formats (e.g. mmo) than for example a STT_REGISTER attribute. | |
2163 | This section faking is based on a construct in elf32-mips.c. */ | |
2164 | static asection mmix_elf_reg_section; | |
2165 | static asymbol mmix_elf_reg_section_symbol; | |
2166 | static asymbol *mmix_elf_reg_section_symbol_ptr; | |
2167 | ||
f60ebe14 | 2168 | /* Handle the special section numbers that a symbol may use. */ |
3c3bdf30 NC |
2169 | |
2170 | void | |
2171 | mmix_elf_symbol_processing (abfd, asym) | |
2172 | bfd *abfd ATTRIBUTE_UNUSED; | |
2173 | asymbol *asym; | |
2174 | { | |
2175 | elf_symbol_type *elfsym; | |
2176 | ||
2177 | elfsym = (elf_symbol_type *) asym; | |
2178 | switch (elfsym->internal_elf_sym.st_shndx) | |
2179 | { | |
2180 | case SHN_REGISTER: | |
2181 | if (mmix_elf_reg_section.name == NULL) | |
2182 | { | |
2183 | /* Initialize the register section. */ | |
2184 | mmix_elf_reg_section.name = MMIX_REG_SECTION_NAME; | |
2185 | mmix_elf_reg_section.flags = SEC_NO_FLAGS; | |
2186 | mmix_elf_reg_section.output_section = &mmix_elf_reg_section; | |
2187 | mmix_elf_reg_section.symbol = &mmix_elf_reg_section_symbol; | |
2188 | mmix_elf_reg_section.symbol_ptr_ptr = &mmix_elf_reg_section_symbol_ptr; | |
2189 | mmix_elf_reg_section_symbol.name = MMIX_REG_SECTION_NAME; | |
2190 | mmix_elf_reg_section_symbol.flags = BSF_SECTION_SYM; | |
2191 | mmix_elf_reg_section_symbol.section = &mmix_elf_reg_section; | |
2192 | mmix_elf_reg_section_symbol_ptr = &mmix_elf_reg_section_symbol; | |
2193 | } | |
2194 | asym->section = &mmix_elf_reg_section; | |
2195 | break; | |
2196 | ||
2197 | default: | |
2198 | break; | |
2199 | } | |
2200 | } | |
2201 | ||
2202 | /* Given a BFD section, try to locate the corresponding ELF section | |
2203 | index. */ | |
2204 | ||
b34976b6 | 2205 | static bfd_boolean |
af746e92 | 2206 | mmix_elf_section_from_bfd_section (abfd, sec, retval) |
3c3bdf30 | 2207 | bfd * abfd ATTRIBUTE_UNUSED; |
3c3bdf30 NC |
2208 | asection * sec; |
2209 | int * retval; | |
2210 | { | |
2211 | if (strcmp (bfd_get_section_name (abfd, sec), MMIX_REG_SECTION_NAME) == 0) | |
2212 | *retval = SHN_REGISTER; | |
2213 | else | |
b34976b6 | 2214 | return FALSE; |
3c3bdf30 | 2215 | |
b34976b6 | 2216 | return TRUE; |
3c3bdf30 NC |
2217 | } |
2218 | ||
2219 | /* Hook called by the linker routine which adds symbols from an object | |
2220 | file. We must handle the special SHN_REGISTER section number here. | |
2221 | ||
2222 | We also check that we only have *one* each of the section-start | |
2223 | symbols, since otherwise having two with the same value would cause | |
2224 | them to be "merged", but with the contents serialized. */ | |
2225 | ||
b34976b6 | 2226 | bfd_boolean |
3c3bdf30 NC |
2227 | mmix_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) |
2228 | bfd *abfd; | |
2229 | struct bfd_link_info *info ATTRIBUTE_UNUSED; | |
555cd476 | 2230 | Elf_Internal_Sym *sym; |
3c3bdf30 NC |
2231 | const char **namep ATTRIBUTE_UNUSED; |
2232 | flagword *flagsp ATTRIBUTE_UNUSED; | |
2233 | asection **secp; | |
2234 | bfd_vma *valp ATTRIBUTE_UNUSED; | |
2235 | { | |
2236 | if (sym->st_shndx == SHN_REGISTER) | |
46fda84e AM |
2237 | { |
2238 | *secp = bfd_make_section_old_way (abfd, MMIX_REG_SECTION_NAME); | |
2239 | (*secp)->flags |= SEC_LINKER_CREATED; | |
2240 | } | |
3c3bdf30 | 2241 | else if ((*namep)[0] == '_' && (*namep)[1] == '_' && (*namep)[2] == '.' |
0112cd26 | 2242 | && CONST_STRNEQ (*namep, MMIX_LOC_SECTION_START_SYMBOL_PREFIX)) |
3c3bdf30 NC |
2243 | { |
2244 | /* See if we have another one. */ | |
4ab82700 AM |
2245 | struct bfd_link_hash_entry *h = bfd_link_hash_lookup (info->hash, |
2246 | *namep, | |
b34976b6 AM |
2247 | FALSE, |
2248 | FALSE, | |
2249 | FALSE); | |
3c3bdf30 | 2250 | |
4ab82700 | 2251 | if (h != NULL && h->type != bfd_link_hash_undefined) |
3c3bdf30 NC |
2252 | { |
2253 | /* How do we get the asymbol (or really: the filename) from h? | |
4ab82700 | 2254 | h->u.def.section->owner is NULL. */ |
3c3bdf30 NC |
2255 | ((*_bfd_error_handler) |
2256 | (_("%s: Error: multiple definition of `%s'; start of %s is set in a earlier linked file\n"), | |
2257 | bfd_get_filename (abfd), *namep, | |
2258 | *namep + strlen (MMIX_LOC_SECTION_START_SYMBOL_PREFIX))); | |
2259 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2260 | return FALSE; |
3c3bdf30 NC |
2261 | } |
2262 | } | |
2263 | ||
b34976b6 | 2264 | return TRUE; |
3c3bdf30 NC |
2265 | } |
2266 | ||
2267 | /* We consider symbols matching "L.*:[0-9]+" to be local symbols. */ | |
2268 | ||
b34976b6 | 2269 | bfd_boolean |
3c3bdf30 NC |
2270 | mmix_elf_is_local_label_name (abfd, name) |
2271 | bfd *abfd; | |
2272 | const char *name; | |
2273 | { | |
2274 | const char *colpos; | |
2275 | int digits; | |
2276 | ||
2277 | /* Also include the default local-label definition. */ | |
2278 | if (_bfd_elf_is_local_label_name (abfd, name)) | |
b34976b6 | 2279 | return TRUE; |
3c3bdf30 NC |
2280 | |
2281 | if (*name != 'L') | |
b34976b6 | 2282 | return FALSE; |
3c3bdf30 NC |
2283 | |
2284 | /* If there's no ":", or more than one, it's not a local symbol. */ | |
2285 | colpos = strchr (name, ':'); | |
2286 | if (colpos == NULL || strchr (colpos + 1, ':') != NULL) | |
b34976b6 | 2287 | return FALSE; |
3c3bdf30 NC |
2288 | |
2289 | /* Check that there are remaining characters and that they are digits. */ | |
2290 | if (colpos[1] == 0) | |
b34976b6 | 2291 | return FALSE; |
3c3bdf30 NC |
2292 | |
2293 | digits = strspn (colpos + 1, "0123456789"); | |
2294 | return digits != 0 && colpos[1 + digits] == 0; | |
2295 | } | |
2296 | ||
2297 | /* We get rid of the register section here. */ | |
2298 | ||
b34976b6 | 2299 | bfd_boolean |
3c3bdf30 NC |
2300 | mmix_elf_final_link (abfd, info) |
2301 | bfd *abfd; | |
2302 | struct bfd_link_info *info; | |
2303 | { | |
2304 | /* We never output a register section, though we create one for | |
2305 | temporary measures. Check that nobody entered contents into it. */ | |
2306 | asection *reg_section; | |
3c3bdf30 NC |
2307 | |
2308 | reg_section = bfd_get_section_by_name (abfd, MMIX_REG_SECTION_NAME); | |
2309 | ||
2310 | if (reg_section != NULL) | |
2311 | { | |
2312 | /* FIXME: Pass error state gracefully. */ | |
2313 | if (bfd_get_section_flags (abfd, reg_section) & SEC_HAS_CONTENTS) | |
2314 | _bfd_abort (__FILE__, __LINE__, _("Register section has contents\n")); | |
2315 | ||
46fda84e AM |
2316 | /* Really remove the section, if it hasn't already been done. */ |
2317 | if (!bfd_section_removed_from_list (abfd, reg_section)) | |
2318 | { | |
2319 | bfd_section_list_remove (abfd, reg_section); | |
2320 | --abfd->section_count; | |
2321 | } | |
3c3bdf30 NC |
2322 | } |
2323 | ||
c152c796 | 2324 | if (! bfd_elf_final_link (abfd, info)) |
b34976b6 | 2325 | return FALSE; |
3c3bdf30 | 2326 | |
930b4cb2 HPN |
2327 | /* Since this section is marked SEC_LINKER_CREATED, it isn't output by |
2328 | the regular linker machinery. We do it here, like other targets with | |
2329 | special sections. */ | |
2330 | if (info->base_file != NULL) | |
2331 | { | |
2332 | asection *greg_section | |
2333 | = bfd_get_section_by_name ((bfd *) info->base_file, | |
2334 | MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME); | |
2335 | if (!bfd_set_section_contents (abfd, | |
2336 | greg_section->output_section, | |
2337 | greg_section->contents, | |
2338 | (file_ptr) greg_section->output_offset, | |
eea6121a | 2339 | greg_section->size)) |
b34976b6 | 2340 | return FALSE; |
930b4cb2 | 2341 | } |
b34976b6 | 2342 | return TRUE; |
930b4cb2 HPN |
2343 | } |
2344 | ||
f60ebe14 | 2345 | /* We need to include the maximum size of PUSHJ-stubs in the initial |
eea6121a | 2346 | section size. This is expected to shrink during linker relaxation. */ |
f60ebe14 HPN |
2347 | |
2348 | static void | |
2349 | mmix_set_relaxable_size (abfd, sec, ptr) | |
2350 | bfd *abfd ATTRIBUTE_UNUSED; | |
2351 | asection *sec; | |
2352 | void *ptr; | |
2353 | { | |
2354 | struct bfd_link_info *info = ptr; | |
2355 | ||
2356 | /* Make sure we only do this for section where we know we want this, | |
2357 | otherwise we might end up resetting the size of COMMONs. */ | |
2358 | if (mmix_elf_section_data (sec)->pjs.n_pushj_relocs == 0) | |
2359 | return; | |
2360 | ||
1a23a9e6 | 2361 | sec->rawsize = sec->size; |
eea6121a AM |
2362 | sec->size += (mmix_elf_section_data (sec)->pjs.n_pushj_relocs |
2363 | * MAX_PUSHJ_STUB_SIZE); | |
f60ebe14 HPN |
2364 | |
2365 | /* For use in relocatable link, we start with a max stubs size. See | |
2366 | mmix_elf_relax_section. */ | |
2367 | if (info->relocatable && sec->output_section) | |
2368 | mmix_elf_section_data (sec->output_section)->pjs.stubs_size_sum | |
2369 | += (mmix_elf_section_data (sec)->pjs.n_pushj_relocs | |
2370 | * MAX_PUSHJ_STUB_SIZE); | |
2371 | } | |
2372 | ||
930b4cb2 HPN |
2373 | /* Initialize stuff for the linker-generated GREGs to match |
2374 | R_MMIX_BASE_PLUS_OFFSET relocs seen by the linker. */ | |
2375 | ||
b34976b6 | 2376 | bfd_boolean |
f60ebe14 | 2377 | _bfd_mmix_before_linker_allocation (abfd, info) |
930b4cb2 HPN |
2378 | bfd *abfd ATTRIBUTE_UNUSED; |
2379 | struct bfd_link_info *info; | |
2380 | { | |
2381 | asection *bpo_gregs_section; | |
2382 | bfd *bpo_greg_owner; | |
2383 | struct bpo_greg_section_info *gregdata; | |
2384 | size_t n_gregs; | |
2385 | bfd_vma gregs_size; | |
2386 | size_t i; | |
2387 | size_t *bpo_reloc_indexes; | |
f60ebe14 HPN |
2388 | bfd *ibfd; |
2389 | ||
2390 | /* Set the initial size of sections. */ | |
2391 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
2392 | bfd_map_over_sections (ibfd, mmix_set_relaxable_size, info); | |
930b4cb2 HPN |
2393 | |
2394 | /* The bpo_greg_owner bfd is supposed to have been set by | |
2395 | mmix_elf_check_relocs when the first R_MMIX_BASE_PLUS_OFFSET is seen. | |
2396 | If there is no such object, there was no R_MMIX_BASE_PLUS_OFFSET. */ | |
2397 | bpo_greg_owner = (bfd *) 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 | ||
930b4cb2 | 2405 | if (bpo_gregs_section == NULL) |
b34976b6 | 2406 | return TRUE; |
930b4cb2 HPN |
2407 | |
2408 | /* We use the target-data handle in the ELF section data. */ | |
f0abc2a1 | 2409 | gregdata = mmix_elf_section_data (bpo_gregs_section)->bpo.greg; |
930b4cb2 | 2410 | if (gregdata == NULL) |
b34976b6 | 2411 | return FALSE; |
930b4cb2 HPN |
2412 | |
2413 | n_gregs = gregdata->n_bpo_relocs; | |
2414 | gregdata->n_allocated_bpo_gregs = n_gregs; | |
2415 | ||
2416 | /* When this reaches zero during relaxation, all entries have been | |
2417 | filled in and the size of the linker gregs can be calculated. */ | |
2418 | gregdata->n_remaining_bpo_relocs_this_relaxation_round = n_gregs; | |
2419 | ||
2420 | /* Set the zeroth-order estimate for the GREGs size. */ | |
2421 | gregs_size = n_gregs * 8; | |
2422 | ||
2423 | if (!bfd_set_section_size (bpo_greg_owner, bpo_gregs_section, gregs_size)) | |
b34976b6 | 2424 | return FALSE; |
930b4cb2 HPN |
2425 | |
2426 | /* Allocate and set up the GREG arrays. They're filled in at relaxation | |
2427 | time. Note that we must use the max number ever noted for the array, | |
2428 | since the index numbers were created before GC. */ | |
2429 | gregdata->reloc_request | |
2430 | = bfd_zalloc (bpo_greg_owner, | |
2431 | sizeof (struct bpo_reloc_request) | |
2432 | * gregdata->n_max_bpo_relocs); | |
2433 | ||
2434 | gregdata->bpo_reloc_indexes | |
2435 | = bpo_reloc_indexes | |
2436 | = bfd_alloc (bpo_greg_owner, | |
2437 | gregdata->n_max_bpo_relocs | |
2438 | * sizeof (size_t)); | |
2439 | if (bpo_reloc_indexes == NULL) | |
b34976b6 | 2440 | return FALSE; |
930b4cb2 HPN |
2441 | |
2442 | /* The default order is an identity mapping. */ | |
2443 | for (i = 0; i < gregdata->n_max_bpo_relocs; i++) | |
2444 | { | |
2445 | bpo_reloc_indexes[i] = i; | |
2446 | gregdata->reloc_request[i].bpo_reloc_no = i; | |
2447 | } | |
2448 | ||
b34976b6 | 2449 | return TRUE; |
3c3bdf30 | 2450 | } |
e06fcc86 | 2451 | \f |
930b4cb2 HPN |
2452 | /* Fill in contents in the linker allocated gregs. Everything is |
2453 | calculated at this point; we just move the contents into place here. */ | |
2454 | ||
b34976b6 | 2455 | bfd_boolean |
f60ebe14 | 2456 | _bfd_mmix_after_linker_allocation (abfd, link_info) |
930b4cb2 HPN |
2457 | bfd *abfd ATTRIBUTE_UNUSED; |
2458 | struct bfd_link_info *link_info; | |
2459 | { | |
2460 | asection *bpo_gregs_section; | |
2461 | bfd *bpo_greg_owner; | |
2462 | struct bpo_greg_section_info *gregdata; | |
2463 | size_t n_gregs; | |
2464 | size_t i, j; | |
2465 | size_t lastreg; | |
2466 | bfd_byte *contents; | |
2467 | ||
2468 | /* The bpo_greg_owner bfd is supposed to have been set by mmix_elf_check_relocs | |
2469 | when the first R_MMIX_BASE_PLUS_OFFSET is seen. If there is no such | |
2470 | object, there was no R_MMIX_BASE_PLUS_OFFSET. */ | |
2471 | bpo_greg_owner = (bfd *) link_info->base_file; | |
2472 | if (bpo_greg_owner == NULL) | |
b34976b6 | 2473 | return TRUE; |
930b4cb2 HPN |
2474 | |
2475 | bpo_gregs_section | |
2476 | = bfd_get_section_by_name (bpo_greg_owner, | |
2477 | MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME); | |
2478 | ||
2479 | /* This can't happen without DSO handling. When DSOs are handled | |
2480 | without any R_MMIX_BASE_PLUS_OFFSET seen, there will be no such | |
2481 | section. */ | |
2482 | if (bpo_gregs_section == NULL) | |
b34976b6 | 2483 | return TRUE; |
930b4cb2 HPN |
2484 | |
2485 | /* We use the target-data handle in the ELF section data. */ | |
2486 | ||
f0abc2a1 | 2487 | gregdata = mmix_elf_section_data (bpo_gregs_section)->bpo.greg; |
930b4cb2 | 2488 | if (gregdata == NULL) |
b34976b6 | 2489 | return FALSE; |
930b4cb2 HPN |
2490 | |
2491 | n_gregs = gregdata->n_allocated_bpo_gregs; | |
2492 | ||
2493 | bpo_gregs_section->contents | |
eea6121a | 2494 | = contents = bfd_alloc (bpo_greg_owner, bpo_gregs_section->size); |
930b4cb2 | 2495 | if (contents == NULL) |
b34976b6 | 2496 | return FALSE; |
930b4cb2 | 2497 | |
7e799044 HPN |
2498 | /* Sanity check: If these numbers mismatch, some relocation has not been |
2499 | accounted for and the rest of gregdata is probably inconsistent. | |
2500 | It's a bug, but it's more helpful to identify it than segfaulting | |
2501 | below. */ | |
2502 | if (gregdata->n_remaining_bpo_relocs_this_relaxation_round | |
2503 | != gregdata->n_bpo_relocs) | |
2504 | { | |
2505 | (*_bfd_error_handler) | |
2506 | (_("Internal inconsistency: remaining %u != max %u.\n\ | |
2507 | Please report this bug."), | |
2508 | gregdata->n_remaining_bpo_relocs_this_relaxation_round, | |
2509 | gregdata->n_bpo_relocs); | |
b34976b6 | 2510 | return FALSE; |
7e799044 HPN |
2511 | } |
2512 | ||
930b4cb2 HPN |
2513 | for (lastreg = 255, i = 0, j = 0; j < n_gregs; i++) |
2514 | if (gregdata->reloc_request[i].regindex != lastreg) | |
2515 | { | |
2516 | bfd_put_64 (bpo_greg_owner, gregdata->reloc_request[i].value, | |
2517 | contents + j * 8); | |
2518 | lastreg = gregdata->reloc_request[i].regindex; | |
2519 | j++; | |
2520 | } | |
2521 | ||
b34976b6 | 2522 | return TRUE; |
930b4cb2 HPN |
2523 | } |
2524 | ||
2525 | /* Sort valid relocs to come before non-valid relocs, then on increasing | |
2526 | value. */ | |
2527 | ||
2528 | static int | |
2529 | bpo_reloc_request_sort_fn (p1, p2) | |
2530 | const PTR p1; | |
2531 | const PTR p2; | |
2532 | { | |
2533 | const struct bpo_reloc_request *r1 = (const struct bpo_reloc_request *) p1; | |
2534 | const struct bpo_reloc_request *r2 = (const struct bpo_reloc_request *) p2; | |
2535 | ||
2536 | /* Primary function is validity; non-valid relocs sorted after valid | |
2537 | ones. */ | |
2538 | if (r1->valid != r2->valid) | |
2539 | return r2->valid - r1->valid; | |
2540 | ||
4fa5c2a8 HPN |
2541 | /* Then sort on value. Don't simplify and return just the difference of |
2542 | the values: the upper bits of the 64-bit value would be truncated on | |
2543 | a host with 32-bit ints. */ | |
930b4cb2 | 2544 | if (r1->value != r2->value) |
4fa5c2a8 | 2545 | return r1->value > r2->value ? 1 : -1; |
930b4cb2 | 2546 | |
dfbbae4c HPN |
2547 | /* As a last re-sort, use the relocation number, so we get a stable |
2548 | sort. The *addresses* aren't stable since items are swapped during | |
2549 | sorting. It depends on the qsort implementation if this actually | |
2550 | happens. */ | |
2551 | return r1->bpo_reloc_no > r2->bpo_reloc_no | |
2552 | ? 1 : (r1->bpo_reloc_no < r2->bpo_reloc_no ? -1 : 0); | |
930b4cb2 HPN |
2553 | } |
2554 | ||
4fa5c2a8 HPN |
2555 | /* For debug use only. Dumps the global register allocations resulting |
2556 | from base-plus-offset relocs. */ | |
2557 | ||
2558 | void | |
2559 | mmix_dump_bpo_gregs (link_info, pf) | |
2560 | struct bfd_link_info *link_info; | |
2561 | bfd_error_handler_type pf; | |
2562 | { | |
2563 | bfd *bpo_greg_owner; | |
2564 | asection *bpo_gregs_section; | |
2565 | struct bpo_greg_section_info *gregdata; | |
2566 | unsigned int i; | |
2567 | ||
2568 | if (link_info == NULL || link_info->base_file == NULL) | |
2569 | return; | |
2570 | ||
2571 | bpo_greg_owner = (bfd *) link_info->base_file; | |
2572 | ||
2573 | bpo_gregs_section | |
2574 | = bfd_get_section_by_name (bpo_greg_owner, | |
2575 | MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME); | |
2576 | ||
2577 | if (bpo_gregs_section == NULL) | |
2578 | return; | |
2579 | ||
f0abc2a1 | 2580 | gregdata = mmix_elf_section_data (bpo_gregs_section)->bpo.greg; |
4fa5c2a8 HPN |
2581 | if (gregdata == NULL) |
2582 | return; | |
2583 | ||
2584 | if (pf == NULL) | |
2585 | pf = _bfd_error_handler; | |
2586 | ||
2587 | /* These format strings are not translated. They are for debug purposes | |
2588 | only and never displayed to an end user. Should they escape, we | |
2589 | surely want them in original. */ | |
2590 | (*pf) (" n_bpo_relocs: %u\n n_max_bpo_relocs: %u\n n_remain...round: %u\n\ | |
2591 | n_allocated_bpo_gregs: %u\n", gregdata->n_bpo_relocs, | |
2592 | gregdata->n_max_bpo_relocs, | |
2593 | gregdata->n_remaining_bpo_relocs_this_relaxation_round, | |
2594 | gregdata->n_allocated_bpo_gregs); | |
2595 | ||
2596 | if (gregdata->reloc_request) | |
2597 | for (i = 0; i < gregdata->n_max_bpo_relocs; i++) | |
2598 | (*pf) ("%4u (%4u)/%4u#%u: 0x%08lx%08lx r: %3u o: %3u\n", | |
2599 | i, | |
cf3d882d AM |
2600 | (gregdata->bpo_reloc_indexes != NULL |
2601 | ? gregdata->bpo_reloc_indexes[i] : (size_t) -1), | |
4fa5c2a8 HPN |
2602 | gregdata->reloc_request[i].bpo_reloc_no, |
2603 | gregdata->reloc_request[i].valid, | |
2604 | ||
2605 | (unsigned long) (gregdata->reloc_request[i].value >> 32), | |
2606 | (unsigned long) gregdata->reloc_request[i].value, | |
2607 | gregdata->reloc_request[i].regindex, | |
2608 | gregdata->reloc_request[i].offset); | |
2609 | } | |
2610 | ||
930b4cb2 HPN |
2611 | /* This links all R_MMIX_BASE_PLUS_OFFSET relocs into a special array, and |
2612 | when the last such reloc is done, an index-array is sorted according to | |
2613 | the values and iterated over to produce register numbers (indexed by 0 | |
2614 | from the first allocated register number) and offsets for use in real | |
80f540b7 | 2615 | relocation. (N.B.: Relocatable runs are handled, not just punted.) |
930b4cb2 | 2616 | |
f60ebe14 HPN |
2617 | PUSHJ stub accounting is also done here. |
2618 | ||
930b4cb2 HPN |
2619 | Symbol- and reloc-reading infrastructure copied from elf-m10200.c. */ |
2620 | ||
b34976b6 | 2621 | static bfd_boolean |
930b4cb2 HPN |
2622 | mmix_elf_relax_section (abfd, sec, link_info, again) |
2623 | bfd *abfd; | |
2624 | asection *sec; | |
2625 | struct bfd_link_info *link_info; | |
b34976b6 | 2626 | bfd_boolean *again; |
930b4cb2 | 2627 | { |
930b4cb2 | 2628 | Elf_Internal_Shdr *symtab_hdr; |
930b4cb2 | 2629 | Elf_Internal_Rela *internal_relocs; |
930b4cb2 HPN |
2630 | Elf_Internal_Rela *irel, *irelend; |
2631 | asection *bpo_gregs_section = NULL; | |
2632 | struct bpo_greg_section_info *gregdata; | |
2633 | struct bpo_reloc_section_info *bpodata | |
f0abc2a1 | 2634 | = mmix_elf_section_data (sec)->bpo.reloc; |
f60ebe14 HPN |
2635 | /* The initialization is to quiet compiler warnings. The value is to |
2636 | spot a missing actual initialization. */ | |
2637 | size_t bpono = (size_t) -1; | |
2638 | size_t pjsno = 0; | |
6cdc0ccc | 2639 | Elf_Internal_Sym *isymbuf = NULL; |
1a23a9e6 | 2640 | bfd_size_type size = sec->rawsize ? sec->rawsize : sec->size; |
f60ebe14 HPN |
2641 | |
2642 | mmix_elf_section_data (sec)->pjs.stubs_size_sum = 0; | |
930b4cb2 HPN |
2643 | |
2644 | /* Assume nothing changes. */ | |
b34976b6 | 2645 | *again = FALSE; |
930b4cb2 | 2646 | |
f60ebe14 HPN |
2647 | /* We don't have to do anything if this section does not have relocs, or |
2648 | if this is not a code section. */ | |
2649 | if ((sec->flags & SEC_RELOC) == 0 | |
930b4cb2 HPN |
2650 | || sec->reloc_count == 0 |
2651 | || (sec->flags & SEC_CODE) == 0 | |
2652 | || (sec->flags & SEC_LINKER_CREATED) != 0 | |
f60ebe14 HPN |
2653 | /* If no R_MMIX_BASE_PLUS_OFFSET relocs and no PUSHJ-stub relocs, |
2654 | then nothing to do. */ | |
2655 | || (bpodata == NULL | |
2656 | && mmix_elf_section_data (sec)->pjs.n_pushj_relocs == 0)) | |
b34976b6 | 2657 | return TRUE; |
930b4cb2 HPN |
2658 | |
2659 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
930b4cb2 | 2660 | |
f60ebe14 HPN |
2661 | if (bpodata != NULL) |
2662 | { | |
2663 | bpo_gregs_section = bpodata->bpo_greg_section; | |
2664 | gregdata = mmix_elf_section_data (bpo_gregs_section)->bpo.greg; | |
2665 | bpono = bpodata->first_base_plus_offset_reloc; | |
2666 | } | |
2667 | else | |
2668 | gregdata = NULL; | |
930b4cb2 HPN |
2669 | |
2670 | /* Get a copy of the native relocations. */ | |
2671 | internal_relocs | |
45d6a902 AM |
2672 | = _bfd_elf_link_read_relocs (abfd, sec, (PTR) NULL, |
2673 | (Elf_Internal_Rela *) NULL, | |
2674 | link_info->keep_memory); | |
930b4cb2 HPN |
2675 | if (internal_relocs == NULL) |
2676 | goto error_return; | |
930b4cb2 HPN |
2677 | |
2678 | /* Walk through them looking for relaxing opportunities. */ | |
2679 | irelend = internal_relocs + sec->reloc_count; | |
2680 | for (irel = internal_relocs; irel < irelend; irel++) | |
2681 | { | |
2682 | bfd_vma symval; | |
f60ebe14 | 2683 | struct elf_link_hash_entry *h = NULL; |
930b4cb2 | 2684 | |
f60ebe14 HPN |
2685 | /* We only process two relocs. */ |
2686 | if (ELF64_R_TYPE (irel->r_info) != (int) R_MMIX_BASE_PLUS_OFFSET | |
2687 | && ELF64_R_TYPE (irel->r_info) != (int) R_MMIX_PUSHJ_STUBBABLE) | |
930b4cb2 HPN |
2688 | continue; |
2689 | ||
f60ebe14 HPN |
2690 | /* We process relocs in a distinctly different way when this is a |
2691 | relocatable link (for one, we don't look at symbols), so we avoid | |
2692 | mixing its code with that for the "normal" relaxation. */ | |
2693 | if (link_info->relocatable) | |
2694 | { | |
2695 | /* The only transformation in a relocatable link is to generate | |
2696 | a full stub at the location of the stub calculated for the | |
2697 | input section, if the relocated stub location, the end of the | |
2698 | output section plus earlier stubs, cannot be reached. Thus | |
2699 | relocatable linking can only lead to worse code, but it still | |
2700 | works. */ | |
2701 | if (ELF64_R_TYPE (irel->r_info) == R_MMIX_PUSHJ_STUBBABLE) | |
2702 | { | |
2703 | /* If we can reach the end of the output-section and beyond | |
2704 | any current stubs, then we don't need a stub for this | |
2705 | reloc. The relaxed order of output stub allocation may | |
2706 | not exactly match the straightforward order, so we always | |
2707 | assume presence of output stubs, which will allow | |
2708 | relaxation only on relocations indifferent to the | |
2709 | presence of output stub allocations for other relocations | |
2710 | and thus the order of output stub allocation. */ | |
2711 | if (bfd_check_overflow (complain_overflow_signed, | |
2712 | 19, | |
2713 | 0, | |
2714 | bfd_arch_bits_per_address (abfd), | |
2715 | /* Output-stub location. */ | |
1a23a9e6 | 2716 | sec->output_section->rawsize |
f60ebe14 HPN |
2717 | + (mmix_elf_section_data (sec |
2718 | ->output_section) | |
2719 | ->pjs.stubs_size_sum) | |
2720 | /* Location of this PUSHJ reloc. */ | |
2721 | - (sec->output_offset + irel->r_offset) | |
2722 | /* Don't count *this* stub twice. */ | |
2723 | - (mmix_elf_section_data (sec) | |
2724 | ->pjs.stub_size[pjsno] | |
2725 | + MAX_PUSHJ_STUB_SIZE)) | |
2726 | == bfd_reloc_ok) | |
2727 | mmix_elf_section_data (sec)->pjs.stub_size[pjsno] = 0; | |
2728 | ||
2729 | mmix_elf_section_data (sec)->pjs.stubs_size_sum | |
2730 | += mmix_elf_section_data (sec)->pjs.stub_size[pjsno]; | |
2731 | ||
2732 | pjsno++; | |
2733 | } | |
2734 | ||
2735 | continue; | |
2736 | } | |
2737 | ||
930b4cb2 HPN |
2738 | /* Get the value of the symbol referred to by the reloc. */ |
2739 | if (ELF64_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
2740 | { | |
2741 | /* A local symbol. */ | |
6cdc0ccc | 2742 | Elf_Internal_Sym *isym; |
930b4cb2 HPN |
2743 | asection *sym_sec; |
2744 | ||
6cdc0ccc AM |
2745 | /* Read this BFD's local symbols if we haven't already. */ |
2746 | if (isymbuf == NULL) | |
2747 | { | |
2748 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
2749 | if (isymbuf == NULL) | |
2750 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
2751 | symtab_hdr->sh_info, 0, | |
2752 | NULL, NULL, NULL); | |
2753 | if (isymbuf == 0) | |
2754 | goto error_return; | |
2755 | } | |
930b4cb2 | 2756 | |
6cdc0ccc AM |
2757 | isym = isymbuf + ELF64_R_SYM (irel->r_info); |
2758 | if (isym->st_shndx == SHN_UNDEF) | |
930b4cb2 | 2759 | sym_sec = bfd_und_section_ptr; |
6cdc0ccc | 2760 | else if (isym->st_shndx == SHN_ABS) |
930b4cb2 | 2761 | sym_sec = bfd_abs_section_ptr; |
6cdc0ccc | 2762 | else if (isym->st_shndx == SHN_COMMON) |
930b4cb2 HPN |
2763 | sym_sec = bfd_com_section_ptr; |
2764 | else | |
6cdc0ccc AM |
2765 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
2766 | symval = (isym->st_value | |
930b4cb2 HPN |
2767 | + sym_sec->output_section->vma |
2768 | + sym_sec->output_offset); | |
2769 | } | |
2770 | else | |
2771 | { | |
2772 | unsigned long indx; | |
930b4cb2 HPN |
2773 | |
2774 | /* An external symbol. */ | |
2775 | indx = ELF64_R_SYM (irel->r_info) - symtab_hdr->sh_info; | |
2776 | h = elf_sym_hashes (abfd)[indx]; | |
2777 | BFD_ASSERT (h != NULL); | |
2778 | if (h->root.type != bfd_link_hash_defined | |
2779 | && h->root.type != bfd_link_hash_defweak) | |
2780 | { | |
f60ebe14 HPN |
2781 | /* This appears to be a reference to an undefined symbol. Just |
2782 | ignore it--it will be caught by the regular reloc processing. | |
2783 | We need to keep BPO reloc accounting consistent, though | |
2784 | else we'll abort instead of emitting an error message. */ | |
2785 | if (ELF64_R_TYPE (irel->r_info) == R_MMIX_BASE_PLUS_OFFSET | |
2786 | && gregdata != NULL) | |
2787 | { | |
2788 | gregdata->n_remaining_bpo_relocs_this_relaxation_round--; | |
2789 | bpono++; | |
2790 | } | |
930b4cb2 HPN |
2791 | continue; |
2792 | } | |
2793 | ||
2794 | symval = (h->root.u.def.value | |
2795 | + h->root.u.def.section->output_section->vma | |
2796 | + h->root.u.def.section->output_offset); | |
2797 | } | |
2798 | ||
f60ebe14 HPN |
2799 | if (ELF64_R_TYPE (irel->r_info) == (int) R_MMIX_PUSHJ_STUBBABLE) |
2800 | { | |
2801 | bfd_vma value = symval + irel->r_addend; | |
2802 | bfd_vma dot | |
2803 | = (sec->output_section->vma | |
2804 | + sec->output_offset | |
2805 | + irel->r_offset); | |
2806 | bfd_vma stubaddr | |
2807 | = (sec->output_section->vma | |
2808 | + sec->output_offset | |
eea6121a | 2809 | + size |
f60ebe14 HPN |
2810 | + mmix_elf_section_data (sec)->pjs.stubs_size_sum); |
2811 | ||
2812 | if ((value & 3) == 0 | |
2813 | && bfd_check_overflow (complain_overflow_signed, | |
2814 | 19, | |
2815 | 0, | |
2816 | bfd_arch_bits_per_address (abfd), | |
2817 | value - dot | |
2818 | - (value > dot | |
2819 | ? mmix_elf_section_data (sec) | |
2820 | ->pjs.stub_size[pjsno] | |
2821 | : 0)) | |
2822 | == bfd_reloc_ok) | |
2823 | /* If the reloc fits, no stub is needed. */ | |
2824 | mmix_elf_section_data (sec)->pjs.stub_size[pjsno] = 0; | |
2825 | else | |
2826 | /* Maybe we can get away with just a JMP insn? */ | |
2827 | if ((value & 3) == 0 | |
2828 | && bfd_check_overflow (complain_overflow_signed, | |
2829 | 27, | |
2830 | 0, | |
2831 | bfd_arch_bits_per_address (abfd), | |
2832 | value - stubaddr | |
2833 | - (value > dot | |
2834 | ? mmix_elf_section_data (sec) | |
2835 | ->pjs.stub_size[pjsno] - 4 | |
2836 | : 0)) | |
2837 | == bfd_reloc_ok) | |
2838 | /* Yep, account for a stub consisting of a single JMP insn. */ | |
2839 | mmix_elf_section_data (sec)->pjs.stub_size[pjsno] = 4; | |
2840 | else | |
2841 | /* Nope, go for the full insn stub. It doesn't seem useful to | |
2842 | emit the intermediate sizes; those will only be useful for | |
2843 | a >64M program assuming contiguous code. */ | |
2844 | mmix_elf_section_data (sec)->pjs.stub_size[pjsno] | |
2845 | = MAX_PUSHJ_STUB_SIZE; | |
2846 | ||
2847 | mmix_elf_section_data (sec)->pjs.stubs_size_sum | |
2848 | += mmix_elf_section_data (sec)->pjs.stub_size[pjsno]; | |
2849 | pjsno++; | |
2850 | continue; | |
2851 | } | |
2852 | ||
2853 | /* We're looking at a R_MMIX_BASE_PLUS_OFFSET reloc. */ | |
2854 | ||
930b4cb2 HPN |
2855 | gregdata->reloc_request[gregdata->bpo_reloc_indexes[bpono]].value |
2856 | = symval + irel->r_addend; | |
b34976b6 | 2857 | gregdata->reloc_request[gregdata->bpo_reloc_indexes[bpono++]].valid = TRUE; |
930b4cb2 HPN |
2858 | gregdata->n_remaining_bpo_relocs_this_relaxation_round--; |
2859 | } | |
2860 | ||
2861 | /* Check if that was the last BPO-reloc. If so, sort the values and | |
2862 | calculate how many registers we need to cover them. Set the size of | |
2863 | the linker gregs, and if the number of registers changed, indicate | |
2864 | that we need to relax some more because we have more work to do. */ | |
f60ebe14 HPN |
2865 | if (gregdata != NULL |
2866 | && gregdata->n_remaining_bpo_relocs_this_relaxation_round == 0) | |
930b4cb2 HPN |
2867 | { |
2868 | size_t i; | |
2869 | bfd_vma prev_base; | |
2870 | size_t regindex; | |
2871 | ||
2872 | /* First, reset the remaining relocs for the next round. */ | |
2873 | gregdata->n_remaining_bpo_relocs_this_relaxation_round | |
2874 | = gregdata->n_bpo_relocs; | |
2875 | ||
2876 | qsort ((PTR) gregdata->reloc_request, | |
2877 | gregdata->n_max_bpo_relocs, | |
2878 | sizeof (struct bpo_reloc_request), | |
2879 | bpo_reloc_request_sort_fn); | |
2880 | ||
2881 | /* Recalculate indexes. When we find a change (however unlikely | |
2882 | after the initial iteration), we know we need to relax again, | |
2883 | since items in the GREG-array are sorted by increasing value and | |
2884 | stored in the relaxation phase. */ | |
2885 | for (i = 0; i < gregdata->n_max_bpo_relocs; i++) | |
2886 | if (gregdata->bpo_reloc_indexes[gregdata->reloc_request[i].bpo_reloc_no] | |
2887 | != i) | |
2888 | { | |
2889 | gregdata->bpo_reloc_indexes[gregdata->reloc_request[i].bpo_reloc_no] | |
2890 | = i; | |
b34976b6 | 2891 | *again = TRUE; |
930b4cb2 HPN |
2892 | } |
2893 | ||
2894 | /* Allocate register numbers (indexing from 0). Stop at the first | |
2895 | non-valid reloc. */ | |
2896 | for (i = 0, regindex = 0, prev_base = gregdata->reloc_request[0].value; | |
2897 | i < gregdata->n_bpo_relocs; | |
2898 | i++) | |
2899 | { | |
2900 | if (gregdata->reloc_request[i].value > prev_base + 255) | |
2901 | { | |
2902 | regindex++; | |
2903 | prev_base = gregdata->reloc_request[i].value; | |
2904 | } | |
2905 | gregdata->reloc_request[i].regindex = regindex; | |
2906 | gregdata->reloc_request[i].offset | |
2907 | = gregdata->reloc_request[i].value - prev_base; | |
2908 | } | |
2909 | ||
2910 | /* If it's not the same as the last time, we need to relax again, | |
2911 | because the size of the section has changed. I'm not sure we | |
2912 | actually need to do any adjustments since the shrinking happens | |
2913 | at the start of this section, but better safe than sorry. */ | |
2914 | if (gregdata->n_allocated_bpo_gregs != regindex + 1) | |
2915 | { | |
2916 | gregdata->n_allocated_bpo_gregs = regindex + 1; | |
b34976b6 | 2917 | *again = TRUE; |
930b4cb2 HPN |
2918 | } |
2919 | ||
eea6121a | 2920 | bpo_gregs_section->size = (regindex + 1) * 8; |
930b4cb2 HPN |
2921 | } |
2922 | ||
6cdc0ccc | 2923 | if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents) |
930b4cb2 HPN |
2924 | { |
2925 | if (! link_info->keep_memory) | |
6cdc0ccc AM |
2926 | free (isymbuf); |
2927 | else | |
930b4cb2 | 2928 | { |
6cdc0ccc AM |
2929 | /* Cache the symbols for elf_link_input_bfd. */ |
2930 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
930b4cb2 HPN |
2931 | } |
2932 | } | |
2933 | ||
6cdc0ccc AM |
2934 | if (internal_relocs != NULL |
2935 | && elf_section_data (sec)->relocs != internal_relocs) | |
2936 | free (internal_relocs); | |
2937 | ||
eea6121a | 2938 | if (sec->size < size + mmix_elf_section_data (sec)->pjs.stubs_size_sum) |
f60ebe14 HPN |
2939 | abort (); |
2940 | ||
eea6121a | 2941 | if (sec->size > size + mmix_elf_section_data (sec)->pjs.stubs_size_sum) |
f60ebe14 | 2942 | { |
eea6121a | 2943 | sec->size = size + mmix_elf_section_data (sec)->pjs.stubs_size_sum; |
f60ebe14 HPN |
2944 | *again = TRUE; |
2945 | } | |
2946 | ||
b34976b6 | 2947 | return TRUE; |
930b4cb2 HPN |
2948 | |
2949 | error_return: | |
6cdc0ccc AM |
2950 | if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents) |
2951 | free (isymbuf); | |
2952 | if (internal_relocs != NULL | |
2953 | && elf_section_data (sec)->relocs != internal_relocs) | |
2954 | free (internal_relocs); | |
b34976b6 | 2955 | return FALSE; |
930b4cb2 HPN |
2956 | } |
2957 | \f | |
3c3bdf30 NC |
2958 | #define ELF_ARCH bfd_arch_mmix |
2959 | #define ELF_MACHINE_CODE EM_MMIX | |
2960 | ||
2961 | /* According to mmix-doc page 36 (paragraph 45), this should be (1LL << 48LL). | |
2962 | However, that's too much for something somewhere in the linker part of | |
2963 | BFD; perhaps the start-address has to be a non-zero multiple of this | |
2964 | number, or larger than this number. The symptom is that the linker | |
2965 | complains: "warning: allocated section `.text' not in segment". We | |
2966 | settle for 64k; the page-size used in examples is 8k. | |
2967 | #define ELF_MAXPAGESIZE 0x10000 | |
2968 | ||
2969 | Unfortunately, this causes excessive padding in the supposedly small | |
2970 | for-education programs that are the expected usage (where people would | |
2971 | inspect output). We stick to 256 bytes just to have *some* default | |
2972 | alignment. */ | |
2973 | #define ELF_MAXPAGESIZE 0x100 | |
2974 | ||
2975 | #define TARGET_BIG_SYM bfd_elf64_mmix_vec | |
2976 | #define TARGET_BIG_NAME "elf64-mmix" | |
2977 | ||
2978 | #define elf_info_to_howto_rel NULL | |
2979 | #define elf_info_to_howto mmix_info_to_howto_rela | |
2980 | #define elf_backend_relocate_section mmix_elf_relocate_section | |
2981 | #define elf_backend_gc_mark_hook mmix_elf_gc_mark_hook | |
930b4cb2 HPN |
2982 | #define elf_backend_gc_sweep_hook mmix_elf_gc_sweep_hook |
2983 | ||
3c3bdf30 NC |
2984 | #define elf_backend_link_output_symbol_hook \ |
2985 | mmix_elf_link_output_symbol_hook | |
2986 | #define elf_backend_add_symbol_hook mmix_elf_add_symbol_hook | |
2987 | ||
2988 | #define elf_backend_check_relocs mmix_elf_check_relocs | |
2989 | #define elf_backend_symbol_processing mmix_elf_symbol_processing | |
74541ad4 AM |
2990 | #define elf_backend_omit_section_dynsym \ |
2991 | ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) | |
3c3bdf30 NC |
2992 | |
2993 | #define bfd_elf64_bfd_is_local_label_name \ | |
2994 | mmix_elf_is_local_label_name | |
2995 | ||
2996 | #define elf_backend_may_use_rel_p 0 | |
2997 | #define elf_backend_may_use_rela_p 1 | |
2998 | #define elf_backend_default_use_rela_p 1 | |
2999 | ||
3000 | #define elf_backend_can_gc_sections 1 | |
3001 | #define elf_backend_section_from_bfd_section \ | |
3002 | mmix_elf_section_from_bfd_section | |
3003 | ||
f0abc2a1 | 3004 | #define bfd_elf64_new_section_hook mmix_elf_new_section_hook |
3c3bdf30 | 3005 | #define bfd_elf64_bfd_final_link mmix_elf_final_link |
930b4cb2 | 3006 | #define bfd_elf64_bfd_relax_section mmix_elf_relax_section |
3c3bdf30 NC |
3007 | |
3008 | #include "elf64-target.h" |