Commit | Line | Data |
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3c3bdf30 | 1 | /* MMIX-specific support for 64-bit ELF. |
2571583a | 2 | Copyright (C) 2001-2017 Free Software Foundation, Inc. |
3c3bdf30 NC |
3 | Contributed by Hans-Peter Nilsson <hp@bitrange.com> |
4 | ||
cd123cb7 | 5 | This file is part of BFD, the Binary File Descriptor library. |
3c3bdf30 | 6 | |
cd123cb7 NC |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
3c3bdf30 | 11 | |
cd123cb7 NC |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
20 | MA 02110-1301, USA. */ | |
3c3bdf30 | 21 | |
3c3bdf30 NC |
22 | |
23 | /* No specific ABI or "processor-specific supplement" defined. */ | |
24 | ||
25 | /* TODO: | |
f60ebe14 HPN |
26 | - "Traditional" linker relaxation (shrinking whole sections). |
27 | - Merge reloc stubs jumping to same location. | |
28 | - GETA stub relaxation (call a stub for out of range new | |
29 | R_MMIX_GETA_STUBBABLE). */ | |
3c3bdf30 | 30 | |
3c3bdf30 | 31 | #include "sysdep.h" |
3db64b00 | 32 | #include "bfd.h" |
3c3bdf30 NC |
33 | #include "libbfd.h" |
34 | #include "elf-bfd.h" | |
35 | #include "elf/mmix.h" | |
36 | #include "opcode/mmix.h" | |
37 | ||
38 | #define MINUS_ONE (((bfd_vma) 0) - 1) | |
39 | ||
f60ebe14 HPN |
40 | #define MAX_PUSHJ_STUB_SIZE (5 * 4) |
41 | ||
3c3bdf30 NC |
42 | /* Put these everywhere in new code. */ |
43 | #define FATAL_DEBUG \ | |
44 | _bfd_abort (__FILE__, __LINE__, \ | |
45 | "Internal: Non-debugged code (test-case missing)") | |
46 | ||
47 | #define BAD_CASE(x) \ | |
48 | _bfd_abort (__FILE__, __LINE__, \ | |
49 | "bad case for " #x) | |
50 | ||
f0abc2a1 AM |
51 | struct _mmix_elf_section_data |
52 | { | |
53 | struct bfd_elf_section_data elf; | |
54 | union | |
55 | { | |
56 | struct bpo_reloc_section_info *reloc; | |
57 | struct bpo_greg_section_info *greg; | |
58 | } bpo; | |
f60ebe14 HPN |
59 | |
60 | struct pushj_stub_info | |
61 | { | |
62 | /* Maximum number of stubs needed for this section. */ | |
63 | bfd_size_type n_pushj_relocs; | |
64 | ||
65 | /* Size of stubs after a mmix_elf_relax_section round. */ | |
66 | bfd_size_type stubs_size_sum; | |
67 | ||
68 | /* Per-reloc stubs_size_sum information. The stubs_size_sum member is the sum | |
69 | of these. Allocated in mmix_elf_check_common_relocs. */ | |
70 | bfd_size_type *stub_size; | |
71 | ||
72 | /* Offset of next stub during relocation. Somewhat redundant with the | |
73 | above: error coverage is easier and we don't have to reset the | |
74 | stubs_size_sum for relocation. */ | |
75 | bfd_size_type stub_offset; | |
76 | } pjs; | |
18978b27 HPN |
77 | |
78 | /* Whether there has been a warning that this section could not be | |
79 | linked due to a specific cause. FIXME: a way to access the | |
80 | linker info or output section, then stuff the limiter guard | |
81 | there. */ | |
82 | bfd_boolean has_warned_bpo; | |
83 | bfd_boolean has_warned_pushj; | |
f0abc2a1 AM |
84 | }; |
85 | ||
86 | #define mmix_elf_section_data(sec) \ | |
68bfbfcc | 87 | ((struct _mmix_elf_section_data *) elf_section_data (sec)) |
f0abc2a1 | 88 | |
930b4cb2 | 89 | /* For each section containing a base-plus-offset (BPO) reloc, we attach |
f0abc2a1 | 90 | this struct as mmix_elf_section_data (section)->bpo, which is otherwise |
930b4cb2 HPN |
91 | NULL. */ |
92 | struct bpo_reloc_section_info | |
93 | { | |
94 | /* The base is 1; this is the first number in this section. */ | |
95 | size_t first_base_plus_offset_reloc; | |
96 | ||
97 | /* Number of BPO-relocs in this section. */ | |
98 | size_t n_bpo_relocs_this_section; | |
99 | ||
100 | /* Running index, used at relocation time. */ | |
101 | size_t bpo_index; | |
102 | ||
103 | /* We don't have access to the bfd_link_info struct in | |
104 | mmix_final_link_relocate. What we really want to get at is the | |
105 | global single struct greg_relocation, so we stash it here. */ | |
106 | asection *bpo_greg_section; | |
107 | }; | |
108 | ||
109 | /* Helper struct (in global context) for the one below. | |
110 | There's one of these created for every BPO reloc. */ | |
111 | struct bpo_reloc_request | |
112 | { | |
113 | bfd_vma value; | |
114 | ||
115 | /* Valid after relaxation. The base is 0; the first register number | |
116 | must be added. The offset is in range 0..255. */ | |
117 | size_t regindex; | |
118 | size_t offset; | |
119 | ||
120 | /* The order number for this BPO reloc, corresponding to the order in | |
121 | which BPO relocs were found. Used to create an index after reloc | |
122 | requests are sorted. */ | |
123 | size_t bpo_reloc_no; | |
124 | ||
125 | /* Set when the value is computed. Better than coding "guard values" | |
b34976b6 | 126 | into the other members. Is FALSE only for BPO relocs in a GC:ed |
930b4cb2 | 127 | section. */ |
b34976b6 | 128 | bfd_boolean valid; |
930b4cb2 HPN |
129 | }; |
130 | ||
f0abc2a1 | 131 | /* We attach this as mmix_elf_section_data (sec)->bpo in the linker-allocated |
930b4cb2 HPN |
132 | greg contents section (MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME), |
133 | which is linked into the register contents section | |
134 | (MMIX_REG_CONTENTS_SECTION_NAME). This section is created by the | |
135 | linker; using the same hook as for usual with BPO relocs does not | |
136 | collide. */ | |
137 | struct bpo_greg_section_info | |
138 | { | |
139 | /* After GC, this reflects the number of remaining, non-excluded | |
140 | BPO-relocs. */ | |
141 | size_t n_bpo_relocs; | |
142 | ||
143 | /* This is the number of allocated bpo_reloc_requests; the size of | |
144 | sorted_indexes. Valid after the check.*relocs functions are called | |
145 | for all incoming sections. It includes the number of BPO relocs in | |
146 | sections that were GC:ed. */ | |
147 | size_t n_max_bpo_relocs; | |
148 | ||
149 | /* A counter used to find out when to fold the BPO gregs, since we | |
150 | don't have a single "after-relaxation" hook. */ | |
151 | size_t n_remaining_bpo_relocs_this_relaxation_round; | |
152 | ||
153 | /* The number of linker-allocated GREGs resulting from BPO relocs. | |
f60ebe14 HPN |
154 | This is an approximation after _bfd_mmix_before_linker_allocation |
155 | and supposedly accurate after mmix_elf_relax_section is called for | |
156 | all incoming non-collected sections. */ | |
930b4cb2 HPN |
157 | size_t n_allocated_bpo_gregs; |
158 | ||
159 | /* Index into reloc_request[], sorted on increasing "value", secondary | |
160 | by increasing index for strict sorting order. */ | |
161 | size_t *bpo_reloc_indexes; | |
162 | ||
163 | /* An array of all relocations, with the "value" member filled in by | |
164 | the relaxation function. */ | |
165 | struct bpo_reloc_request *reloc_request; | |
166 | }; | |
167 | ||
3c3bdf30 | 168 | |
2c3fc389 | 169 | extern bfd_boolean mmix_elf_final_link (bfd *, struct bfd_link_info *); |
3c3bdf30 | 170 | |
2c3fc389 | 171 | extern void mmix_elf_symbol_processing (bfd *, asymbol *); |
3c3bdf30 | 172 | |
4fa5c2a8 HPN |
173 | /* Only intended to be called from a debugger. */ |
174 | extern void mmix_dump_bpo_gregs | |
52d45da3 | 175 | (struct bfd_link_info *, void (*) (const char *, ...)); |
4fa5c2a8 | 176 | |
f60ebe14 | 177 | static void |
2c3fc389 NC |
178 | mmix_set_relaxable_size (bfd *, asection *, void *); |
179 | static bfd_reloc_status_type | |
180 | mmix_elf_reloc (bfd *, arelent *, asymbol *, void *, | |
181 | asection *, bfd *, char **); | |
182 | static bfd_reloc_status_type | |
183 | mmix_final_link_relocate (reloc_howto_type *, asection *, bfd_byte *, bfd_vma, | |
184 | bfd_signed_vma, bfd_vma, const char *, asection *, | |
185 | char **); | |
f60ebe14 | 186 | |
f60ebe14 | 187 | |
3c3bdf30 NC |
188 | /* Watch out: this currently needs to have elements with the same index as |
189 | their R_MMIX_ number. */ | |
190 | static reloc_howto_type elf_mmix_howto_table[] = | |
191 | { | |
192 | /* This reloc does nothing. */ | |
193 | HOWTO (R_MMIX_NONE, /* type */ | |
194 | 0, /* rightshift */ | |
6346d5ca AM |
195 | 3, /* size (0 = byte, 1 = short, 2 = long) */ |
196 | 0, /* bitsize */ | |
b34976b6 | 197 | FALSE, /* pc_relative */ |
3c3bdf30 | 198 | 0, /* bitpos */ |
6346d5ca | 199 | complain_overflow_dont, /* complain_on_overflow */ |
3c3bdf30 NC |
200 | bfd_elf_generic_reloc, /* special_function */ |
201 | "R_MMIX_NONE", /* name */ | |
b34976b6 | 202 | FALSE, /* partial_inplace */ |
3c3bdf30 NC |
203 | 0, /* src_mask */ |
204 | 0, /* dst_mask */ | |
b34976b6 | 205 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
206 | |
207 | /* An 8 bit absolute relocation. */ | |
208 | HOWTO (R_MMIX_8, /* type */ | |
209 | 0, /* rightshift */ | |
210 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
211 | 8, /* bitsize */ | |
b34976b6 | 212 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
213 | 0, /* bitpos */ |
214 | complain_overflow_bitfield, /* complain_on_overflow */ | |
215 | bfd_elf_generic_reloc, /* special_function */ | |
216 | "R_MMIX_8", /* name */ | |
b34976b6 | 217 | FALSE, /* partial_inplace */ |
930b4cb2 | 218 | 0, /* src_mask */ |
3c3bdf30 | 219 | 0xff, /* dst_mask */ |
b34976b6 | 220 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
221 | |
222 | /* An 16 bit absolute relocation. */ | |
223 | HOWTO (R_MMIX_16, /* type */ | |
224 | 0, /* rightshift */ | |
225 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
226 | 16, /* bitsize */ | |
b34976b6 | 227 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
228 | 0, /* bitpos */ |
229 | complain_overflow_bitfield, /* complain_on_overflow */ | |
230 | bfd_elf_generic_reloc, /* special_function */ | |
231 | "R_MMIX_16", /* name */ | |
b34976b6 | 232 | FALSE, /* partial_inplace */ |
930b4cb2 | 233 | 0, /* src_mask */ |
3c3bdf30 | 234 | 0xffff, /* dst_mask */ |
b34976b6 | 235 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
236 | |
237 | /* An 24 bit absolute relocation. */ | |
238 | HOWTO (R_MMIX_24, /* type */ | |
239 | 0, /* rightshift */ | |
240 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
241 | 24, /* bitsize */ | |
b34976b6 | 242 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
243 | 0, /* bitpos */ |
244 | complain_overflow_bitfield, /* complain_on_overflow */ | |
245 | bfd_elf_generic_reloc, /* special_function */ | |
246 | "R_MMIX_24", /* name */ | |
b34976b6 | 247 | FALSE, /* partial_inplace */ |
930b4cb2 | 248 | ~0xffffff, /* src_mask */ |
3c3bdf30 | 249 | 0xffffff, /* dst_mask */ |
b34976b6 | 250 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
251 | |
252 | /* A 32 bit absolute relocation. */ | |
253 | HOWTO (R_MMIX_32, /* type */ | |
254 | 0, /* rightshift */ | |
255 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
256 | 32, /* bitsize */ | |
b34976b6 | 257 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
258 | 0, /* bitpos */ |
259 | complain_overflow_bitfield, /* complain_on_overflow */ | |
260 | bfd_elf_generic_reloc, /* special_function */ | |
261 | "R_MMIX_32", /* name */ | |
b34976b6 | 262 | FALSE, /* partial_inplace */ |
930b4cb2 | 263 | 0, /* src_mask */ |
3c3bdf30 | 264 | 0xffffffff, /* dst_mask */ |
b34976b6 | 265 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
266 | |
267 | /* 64 bit relocation. */ | |
268 | HOWTO (R_MMIX_64, /* type */ | |
269 | 0, /* rightshift */ | |
270 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
271 | 64, /* bitsize */ | |
b34976b6 | 272 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
273 | 0, /* bitpos */ |
274 | complain_overflow_bitfield, /* complain_on_overflow */ | |
275 | bfd_elf_generic_reloc, /* special_function */ | |
276 | "R_MMIX_64", /* name */ | |
b34976b6 | 277 | FALSE, /* partial_inplace */ |
930b4cb2 | 278 | 0, /* src_mask */ |
3c3bdf30 | 279 | MINUS_ONE, /* dst_mask */ |
b34976b6 | 280 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
281 | |
282 | /* An 8 bit PC-relative relocation. */ | |
283 | HOWTO (R_MMIX_PC_8, /* type */ | |
284 | 0, /* rightshift */ | |
285 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
286 | 8, /* bitsize */ | |
b34976b6 | 287 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
288 | 0, /* bitpos */ |
289 | complain_overflow_bitfield, /* complain_on_overflow */ | |
290 | bfd_elf_generic_reloc, /* special_function */ | |
291 | "R_MMIX_PC_8", /* name */ | |
b34976b6 | 292 | FALSE, /* partial_inplace */ |
930b4cb2 | 293 | 0, /* src_mask */ |
3c3bdf30 | 294 | 0xff, /* dst_mask */ |
b34976b6 | 295 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
296 | |
297 | /* An 16 bit PC-relative relocation. */ | |
298 | HOWTO (R_MMIX_PC_16, /* type */ | |
299 | 0, /* rightshift */ | |
300 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
301 | 16, /* bitsize */ | |
b34976b6 | 302 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
303 | 0, /* bitpos */ |
304 | complain_overflow_bitfield, /* complain_on_overflow */ | |
305 | bfd_elf_generic_reloc, /* special_function */ | |
306 | "R_MMIX_PC_16", /* name */ | |
b34976b6 | 307 | FALSE, /* partial_inplace */ |
930b4cb2 | 308 | 0, /* src_mask */ |
3c3bdf30 | 309 | 0xffff, /* dst_mask */ |
b34976b6 | 310 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
311 | |
312 | /* An 24 bit PC-relative relocation. */ | |
313 | HOWTO (R_MMIX_PC_24, /* type */ | |
314 | 0, /* rightshift */ | |
315 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
316 | 24, /* bitsize */ | |
b34976b6 | 317 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
318 | 0, /* bitpos */ |
319 | complain_overflow_bitfield, /* complain_on_overflow */ | |
320 | bfd_elf_generic_reloc, /* special_function */ | |
321 | "R_MMIX_PC_24", /* name */ | |
b34976b6 | 322 | FALSE, /* partial_inplace */ |
930b4cb2 | 323 | ~0xffffff, /* src_mask */ |
3c3bdf30 | 324 | 0xffffff, /* dst_mask */ |
b34976b6 | 325 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
326 | |
327 | /* A 32 bit absolute PC-relative relocation. */ | |
328 | HOWTO (R_MMIX_PC_32, /* type */ | |
329 | 0, /* rightshift */ | |
330 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
331 | 32, /* bitsize */ | |
b34976b6 | 332 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
333 | 0, /* bitpos */ |
334 | complain_overflow_bitfield, /* complain_on_overflow */ | |
335 | bfd_elf_generic_reloc, /* special_function */ | |
336 | "R_MMIX_PC_32", /* name */ | |
b34976b6 | 337 | FALSE, /* partial_inplace */ |
930b4cb2 | 338 | 0, /* src_mask */ |
3c3bdf30 | 339 | 0xffffffff, /* dst_mask */ |
b34976b6 | 340 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
341 | |
342 | /* 64 bit PC-relative relocation. */ | |
343 | HOWTO (R_MMIX_PC_64, /* type */ | |
344 | 0, /* rightshift */ | |
345 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
346 | 64, /* bitsize */ | |
b34976b6 | 347 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
348 | 0, /* bitpos */ |
349 | complain_overflow_bitfield, /* complain_on_overflow */ | |
350 | bfd_elf_generic_reloc, /* special_function */ | |
351 | "R_MMIX_PC_64", /* name */ | |
b34976b6 | 352 | FALSE, /* partial_inplace */ |
930b4cb2 | 353 | 0, /* src_mask */ |
3c3bdf30 | 354 | MINUS_ONE, /* dst_mask */ |
b34976b6 | 355 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
356 | |
357 | /* GNU extension to record C++ vtable hierarchy. */ | |
358 | HOWTO (R_MMIX_GNU_VTINHERIT, /* type */ | |
359 | 0, /* rightshift */ | |
360 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
361 | 0, /* bitsize */ | |
b34976b6 | 362 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
363 | 0, /* bitpos */ |
364 | complain_overflow_dont, /* complain_on_overflow */ | |
365 | NULL, /* special_function */ | |
366 | "R_MMIX_GNU_VTINHERIT", /* name */ | |
b34976b6 | 367 | FALSE, /* partial_inplace */ |
3c3bdf30 NC |
368 | 0, /* src_mask */ |
369 | 0, /* dst_mask */ | |
b34976b6 | 370 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
371 | |
372 | /* GNU extension to record C++ vtable member usage. */ | |
373 | HOWTO (R_MMIX_GNU_VTENTRY, /* type */ | |
374 | 0, /* rightshift */ | |
375 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
376 | 0, /* bitsize */ | |
b34976b6 | 377 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
378 | 0, /* bitpos */ |
379 | complain_overflow_dont, /* complain_on_overflow */ | |
380 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
381 | "R_MMIX_GNU_VTENTRY", /* name */ | |
b34976b6 | 382 | FALSE, /* partial_inplace */ |
3c3bdf30 NC |
383 | 0, /* src_mask */ |
384 | 0, /* dst_mask */ | |
b34976b6 | 385 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
386 | |
387 | /* The GETA relocation is supposed to get any address that could | |
388 | possibly be reached by the GETA instruction. It can silently expand | |
389 | to get a 64-bit operand, but will complain if any of the two least | |
390 | significant bits are set. The howto members reflect a simple GETA. */ | |
391 | HOWTO (R_MMIX_GETA, /* type */ | |
392 | 2, /* rightshift */ | |
393 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
394 | 19, /* bitsize */ | |
b34976b6 | 395 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
396 | 0, /* bitpos */ |
397 | complain_overflow_signed, /* complain_on_overflow */ | |
398 | mmix_elf_reloc, /* special_function */ | |
399 | "R_MMIX_GETA", /* name */ | |
b34976b6 | 400 | FALSE, /* partial_inplace */ |
930b4cb2 | 401 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 402 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 403 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
404 | |
405 | HOWTO (R_MMIX_GETA_1, /* type */ | |
406 | 2, /* rightshift */ | |
407 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
408 | 19, /* bitsize */ | |
b34976b6 | 409 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
410 | 0, /* bitpos */ |
411 | complain_overflow_signed, /* complain_on_overflow */ | |
412 | mmix_elf_reloc, /* special_function */ | |
413 | "R_MMIX_GETA_1", /* name */ | |
b34976b6 | 414 | FALSE, /* partial_inplace */ |
930b4cb2 | 415 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 416 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 417 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
418 | |
419 | HOWTO (R_MMIX_GETA_2, /* type */ | |
420 | 2, /* rightshift */ | |
421 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
422 | 19, /* bitsize */ | |
b34976b6 | 423 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
424 | 0, /* bitpos */ |
425 | complain_overflow_signed, /* complain_on_overflow */ | |
426 | mmix_elf_reloc, /* special_function */ | |
427 | "R_MMIX_GETA_2", /* name */ | |
b34976b6 | 428 | FALSE, /* partial_inplace */ |
930b4cb2 | 429 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 430 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 431 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
432 | |
433 | HOWTO (R_MMIX_GETA_3, /* type */ | |
434 | 2, /* rightshift */ | |
435 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
436 | 19, /* bitsize */ | |
b34976b6 | 437 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
438 | 0, /* bitpos */ |
439 | complain_overflow_signed, /* complain_on_overflow */ | |
440 | mmix_elf_reloc, /* special_function */ | |
441 | "R_MMIX_GETA_3", /* name */ | |
b34976b6 | 442 | FALSE, /* partial_inplace */ |
930b4cb2 | 443 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 444 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 445 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
446 | |
447 | /* The conditional branches are supposed to reach any (code) address. | |
448 | It can silently expand to a 64-bit operand, but will emit an error if | |
449 | any of the two least significant bits are set. The howto members | |
450 | reflect a simple branch. */ | |
451 | HOWTO (R_MMIX_CBRANCH, /* type */ | |
452 | 2, /* rightshift */ | |
453 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
454 | 19, /* bitsize */ | |
b34976b6 | 455 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
456 | 0, /* bitpos */ |
457 | complain_overflow_signed, /* complain_on_overflow */ | |
458 | mmix_elf_reloc, /* special_function */ | |
459 | "R_MMIX_CBRANCH", /* name */ | |
b34976b6 | 460 | FALSE, /* partial_inplace */ |
930b4cb2 | 461 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 462 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 463 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
464 | |
465 | HOWTO (R_MMIX_CBRANCH_J, /* type */ | |
466 | 2, /* rightshift */ | |
467 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
468 | 19, /* bitsize */ | |
b34976b6 | 469 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
470 | 0, /* bitpos */ |
471 | complain_overflow_signed, /* complain_on_overflow */ | |
472 | mmix_elf_reloc, /* special_function */ | |
473 | "R_MMIX_CBRANCH_J", /* name */ | |
b34976b6 | 474 | FALSE, /* partial_inplace */ |
930b4cb2 | 475 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 476 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 477 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
478 | |
479 | HOWTO (R_MMIX_CBRANCH_1, /* type */ | |
480 | 2, /* rightshift */ | |
481 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
482 | 19, /* bitsize */ | |
b34976b6 | 483 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
484 | 0, /* bitpos */ |
485 | complain_overflow_signed, /* complain_on_overflow */ | |
486 | mmix_elf_reloc, /* special_function */ | |
487 | "R_MMIX_CBRANCH_1", /* name */ | |
b34976b6 | 488 | FALSE, /* partial_inplace */ |
930b4cb2 | 489 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 490 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 491 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
492 | |
493 | HOWTO (R_MMIX_CBRANCH_2, /* type */ | |
494 | 2, /* rightshift */ | |
495 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
496 | 19, /* bitsize */ | |
b34976b6 | 497 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
498 | 0, /* bitpos */ |
499 | complain_overflow_signed, /* complain_on_overflow */ | |
500 | mmix_elf_reloc, /* special_function */ | |
501 | "R_MMIX_CBRANCH_2", /* name */ | |
b34976b6 | 502 | FALSE, /* partial_inplace */ |
930b4cb2 | 503 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 504 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 505 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
506 | |
507 | HOWTO (R_MMIX_CBRANCH_3, /* type */ | |
508 | 2, /* rightshift */ | |
509 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
510 | 19, /* bitsize */ | |
b34976b6 | 511 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
512 | 0, /* bitpos */ |
513 | complain_overflow_signed, /* complain_on_overflow */ | |
514 | mmix_elf_reloc, /* special_function */ | |
515 | "R_MMIX_CBRANCH_3", /* name */ | |
b34976b6 | 516 | FALSE, /* partial_inplace */ |
930b4cb2 | 517 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 518 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 519 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
520 | |
521 | /* The PUSHJ instruction can reach any (code) address, as long as it's | |
522 | the beginning of a function (no usable restriction). It can silently | |
523 | expand to a 64-bit operand, but will emit an error if any of the two | |
f60ebe14 HPN |
524 | least significant bits are set. It can also expand into a call to a |
525 | stub; see R_MMIX_PUSHJ_STUBBABLE. The howto members reflect a simple | |
3c3bdf30 NC |
526 | PUSHJ. */ |
527 | HOWTO (R_MMIX_PUSHJ, /* 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_PUSHJ", /* 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_PUSHJ_1, /* 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_PUSHJ_1", /* 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_PUSHJ_2, /* 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_PUSHJ_2", /* 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 | HOWTO (R_MMIX_PUSHJ_3, /* type */ | |
570 | 2, /* rightshift */ | |
571 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
572 | 19, /* bitsize */ | |
b34976b6 | 573 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
574 | 0, /* bitpos */ |
575 | complain_overflow_signed, /* complain_on_overflow */ | |
576 | mmix_elf_reloc, /* special_function */ | |
577 | "R_MMIX_PUSHJ_3", /* name */ | |
b34976b6 | 578 | FALSE, /* partial_inplace */ |
930b4cb2 | 579 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 580 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 581 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
582 | |
583 | /* A JMP is supposed to reach any (code) address. By itself, it can | |
584 | reach +-64M; the expansion can reach all 64 bits. Note that the 64M | |
585 | limit is soon reached if you link the program in wildly different | |
586 | memory segments. The howto members reflect a trivial JMP. */ | |
587 | HOWTO (R_MMIX_JMP, /* type */ | |
588 | 2, /* rightshift */ | |
589 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
590 | 27, /* bitsize */ | |
b34976b6 | 591 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
592 | 0, /* bitpos */ |
593 | complain_overflow_signed, /* complain_on_overflow */ | |
594 | mmix_elf_reloc, /* special_function */ | |
595 | "R_MMIX_JMP", /* name */ | |
b34976b6 | 596 | FALSE, /* partial_inplace */ |
930b4cb2 | 597 | ~0x1ffffff, /* src_mask */ |
3c3bdf30 | 598 | 0x1ffffff, /* dst_mask */ |
b34976b6 | 599 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
600 | |
601 | HOWTO (R_MMIX_JMP_1, /* type */ | |
602 | 2, /* rightshift */ | |
603 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
604 | 27, /* bitsize */ | |
b34976b6 | 605 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
606 | 0, /* bitpos */ |
607 | complain_overflow_signed, /* complain_on_overflow */ | |
608 | mmix_elf_reloc, /* special_function */ | |
609 | "R_MMIX_JMP_1", /* name */ | |
b34976b6 | 610 | FALSE, /* partial_inplace */ |
930b4cb2 | 611 | ~0x1ffffff, /* src_mask */ |
3c3bdf30 | 612 | 0x1ffffff, /* dst_mask */ |
b34976b6 | 613 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
614 | |
615 | HOWTO (R_MMIX_JMP_2, /* type */ | |
616 | 2, /* rightshift */ | |
617 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
618 | 27, /* bitsize */ | |
b34976b6 | 619 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
620 | 0, /* bitpos */ |
621 | complain_overflow_signed, /* complain_on_overflow */ | |
622 | mmix_elf_reloc, /* special_function */ | |
623 | "R_MMIX_JMP_2", /* name */ | |
b34976b6 | 624 | FALSE, /* partial_inplace */ |
930b4cb2 | 625 | ~0x1ffffff, /* src_mask */ |
3c3bdf30 | 626 | 0x1ffffff, /* dst_mask */ |
b34976b6 | 627 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
628 | |
629 | HOWTO (R_MMIX_JMP_3, /* type */ | |
630 | 2, /* rightshift */ | |
631 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
632 | 27, /* bitsize */ | |
b34976b6 | 633 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
634 | 0, /* bitpos */ |
635 | complain_overflow_signed, /* complain_on_overflow */ | |
636 | mmix_elf_reloc, /* special_function */ | |
637 | "R_MMIX_JMP_3", /* name */ | |
b34976b6 | 638 | FALSE, /* partial_inplace */ |
930b4cb2 | 639 | ~0x1ffffff, /* src_mask */ |
3c3bdf30 | 640 | 0x1ffffff, /* dst_mask */ |
b34976b6 | 641 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
642 | |
643 | /* When we don't emit link-time-relaxable code from the assembler, or | |
644 | when relaxation has done all it can do, these relocs are used. For | |
645 | GETA/PUSHJ/branches. */ | |
646 | HOWTO (R_MMIX_ADDR19, /* type */ | |
647 | 2, /* rightshift */ | |
648 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
649 | 19, /* bitsize */ | |
b34976b6 | 650 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
651 | 0, /* bitpos */ |
652 | complain_overflow_signed, /* complain_on_overflow */ | |
653 | mmix_elf_reloc, /* special_function */ | |
654 | "R_MMIX_ADDR19", /* name */ | |
b34976b6 | 655 | FALSE, /* partial_inplace */ |
930b4cb2 | 656 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 657 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 658 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
659 | |
660 | /* For JMP. */ | |
661 | HOWTO (R_MMIX_ADDR27, /* type */ | |
662 | 2, /* rightshift */ | |
663 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
664 | 27, /* bitsize */ | |
b34976b6 | 665 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
666 | 0, /* bitpos */ |
667 | complain_overflow_signed, /* complain_on_overflow */ | |
668 | mmix_elf_reloc, /* special_function */ | |
669 | "R_MMIX_ADDR27", /* name */ | |
b34976b6 | 670 | FALSE, /* partial_inplace */ |
930b4cb2 | 671 | ~0x1ffffff, /* src_mask */ |
3c3bdf30 | 672 | 0x1ffffff, /* dst_mask */ |
b34976b6 | 673 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
674 | |
675 | /* A general register or the value 0..255. If a value, then the | |
676 | instruction (offset -3) needs adjusting. */ | |
677 | HOWTO (R_MMIX_REG_OR_BYTE, /* type */ | |
678 | 0, /* rightshift */ | |
679 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
680 | 8, /* bitsize */ | |
b34976b6 | 681 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
682 | 0, /* bitpos */ |
683 | complain_overflow_bitfield, /* complain_on_overflow */ | |
684 | mmix_elf_reloc, /* special_function */ | |
685 | "R_MMIX_REG_OR_BYTE", /* name */ | |
b34976b6 | 686 | FALSE, /* partial_inplace */ |
930b4cb2 | 687 | 0, /* src_mask */ |
3c3bdf30 | 688 | 0xff, /* dst_mask */ |
b34976b6 | 689 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
690 | |
691 | /* A general register. */ | |
692 | HOWTO (R_MMIX_REG, /* type */ | |
693 | 0, /* rightshift */ | |
694 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
695 | 8, /* bitsize */ | |
b34976b6 | 696 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
697 | 0, /* bitpos */ |
698 | complain_overflow_bitfield, /* complain_on_overflow */ | |
699 | mmix_elf_reloc, /* special_function */ | |
700 | "R_MMIX_REG", /* name */ | |
b34976b6 | 701 | FALSE, /* partial_inplace */ |
930b4cb2 | 702 | 0, /* src_mask */ |
3c3bdf30 | 703 | 0xff, /* dst_mask */ |
b34976b6 | 704 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
705 | |
706 | /* A register plus an index, corresponding to the relocation expression. | |
707 | The sizes must correspond to the valid range of the expression, while | |
708 | the bitmasks correspond to what we store in the image. */ | |
709 | HOWTO (R_MMIX_BASE_PLUS_OFFSET, /* type */ | |
710 | 0, /* rightshift */ | |
711 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
712 | 64, /* bitsize */ | |
b34976b6 | 713 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
714 | 0, /* bitpos */ |
715 | complain_overflow_bitfield, /* complain_on_overflow */ | |
716 | mmix_elf_reloc, /* special_function */ | |
717 | "R_MMIX_BASE_PLUS_OFFSET", /* name */ | |
b34976b6 | 718 | FALSE, /* partial_inplace */ |
930b4cb2 | 719 | 0, /* src_mask */ |
3c3bdf30 | 720 | 0xffff, /* dst_mask */ |
b34976b6 | 721 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
722 | |
723 | /* A "magic" relocation for a LOCAL expression, asserting that the | |
724 | expression is less than the number of global registers. No actual | |
725 | modification of the contents is done. Implementing this as a | |
726 | relocation was less intrusive than e.g. putting such expressions in a | |
727 | section to discard *after* relocation. */ | |
728 | HOWTO (R_MMIX_LOCAL, /* type */ | |
729 | 0, /* rightshift */ | |
730 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
731 | 0, /* bitsize */ | |
b34976b6 | 732 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
733 | 0, /* bitpos */ |
734 | complain_overflow_dont, /* complain_on_overflow */ | |
735 | mmix_elf_reloc, /* special_function */ | |
736 | "R_MMIX_LOCAL", /* name */ | |
b34976b6 | 737 | FALSE, /* partial_inplace */ |
3c3bdf30 NC |
738 | 0, /* src_mask */ |
739 | 0, /* dst_mask */ | |
b34976b6 | 740 | FALSE), /* pcrel_offset */ |
f60ebe14 HPN |
741 | |
742 | HOWTO (R_MMIX_PUSHJ_STUBBABLE, /* type */ | |
743 | 2, /* rightshift */ | |
744 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
745 | 19, /* bitsize */ | |
746 | TRUE, /* pc_relative */ | |
747 | 0, /* bitpos */ | |
748 | complain_overflow_signed, /* complain_on_overflow */ | |
749 | mmix_elf_reloc, /* special_function */ | |
750 | "R_MMIX_PUSHJ_STUBBABLE", /* name */ | |
751 | FALSE, /* partial_inplace */ | |
752 | ~0x0100ffff, /* src_mask */ | |
753 | 0x0100ffff, /* dst_mask */ | |
754 | TRUE) /* pcrel_offset */ | |
3c3bdf30 NC |
755 | }; |
756 | ||
757 | ||
758 | /* Map BFD reloc types to MMIX ELF reloc types. */ | |
759 | ||
760 | struct mmix_reloc_map | |
761 | { | |
762 | bfd_reloc_code_real_type bfd_reloc_val; | |
763 | enum elf_mmix_reloc_type elf_reloc_val; | |
764 | }; | |
765 | ||
766 | ||
767 | static const struct mmix_reloc_map mmix_reloc_map[] = | |
768 | { | |
769 | {BFD_RELOC_NONE, R_MMIX_NONE}, | |
770 | {BFD_RELOC_8, R_MMIX_8}, | |
771 | {BFD_RELOC_16, R_MMIX_16}, | |
772 | {BFD_RELOC_24, R_MMIX_24}, | |
773 | {BFD_RELOC_32, R_MMIX_32}, | |
774 | {BFD_RELOC_64, R_MMIX_64}, | |
775 | {BFD_RELOC_8_PCREL, R_MMIX_PC_8}, | |
776 | {BFD_RELOC_16_PCREL, R_MMIX_PC_16}, | |
777 | {BFD_RELOC_24_PCREL, R_MMIX_PC_24}, | |
778 | {BFD_RELOC_32_PCREL, R_MMIX_PC_32}, | |
779 | {BFD_RELOC_64_PCREL, R_MMIX_PC_64}, | |
780 | {BFD_RELOC_VTABLE_INHERIT, R_MMIX_GNU_VTINHERIT}, | |
781 | {BFD_RELOC_VTABLE_ENTRY, R_MMIX_GNU_VTENTRY}, | |
782 | {BFD_RELOC_MMIX_GETA, R_MMIX_GETA}, | |
783 | {BFD_RELOC_MMIX_CBRANCH, R_MMIX_CBRANCH}, | |
784 | {BFD_RELOC_MMIX_PUSHJ, R_MMIX_PUSHJ}, | |
785 | {BFD_RELOC_MMIX_JMP, R_MMIX_JMP}, | |
786 | {BFD_RELOC_MMIX_ADDR19, R_MMIX_ADDR19}, | |
787 | {BFD_RELOC_MMIX_ADDR27, R_MMIX_ADDR27}, | |
788 | {BFD_RELOC_MMIX_REG_OR_BYTE, R_MMIX_REG_OR_BYTE}, | |
789 | {BFD_RELOC_MMIX_REG, R_MMIX_REG}, | |
790 | {BFD_RELOC_MMIX_BASE_PLUS_OFFSET, R_MMIX_BASE_PLUS_OFFSET}, | |
f60ebe14 HPN |
791 | {BFD_RELOC_MMIX_LOCAL, R_MMIX_LOCAL}, |
792 | {BFD_RELOC_MMIX_PUSHJ_STUBBABLE, R_MMIX_PUSHJ_STUBBABLE} | |
3c3bdf30 NC |
793 | }; |
794 | ||
795 | static reloc_howto_type * | |
2c3fc389 NC |
796 | bfd_elf64_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
797 | bfd_reloc_code_real_type code) | |
3c3bdf30 NC |
798 | { |
799 | unsigned int i; | |
800 | ||
801 | for (i = 0; | |
802 | i < sizeof (mmix_reloc_map) / sizeof (mmix_reloc_map[0]); | |
803 | i++) | |
804 | { | |
805 | if (mmix_reloc_map[i].bfd_reloc_val == code) | |
806 | return &elf_mmix_howto_table[mmix_reloc_map[i].elf_reloc_val]; | |
807 | } | |
808 | ||
809 | return NULL; | |
157090f7 AM |
810 | } |
811 | ||
812 | static reloc_howto_type * | |
813 | bfd_elf64_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
814 | const char *r_name) | |
815 | { | |
816 | unsigned int i; | |
817 | ||
818 | for (i = 0; | |
819 | i < sizeof (elf_mmix_howto_table) / sizeof (elf_mmix_howto_table[0]); | |
820 | i++) | |
821 | if (elf_mmix_howto_table[i].name != NULL | |
822 | && strcasecmp (elf_mmix_howto_table[i].name, r_name) == 0) | |
823 | return &elf_mmix_howto_table[i]; | |
824 | ||
825 | return NULL; | |
3c3bdf30 NC |
826 | } |
827 | ||
f0abc2a1 | 828 | static bfd_boolean |
2c3fc389 | 829 | mmix_elf_new_section_hook (bfd *abfd, asection *sec) |
f0abc2a1 | 830 | { |
f592407e AM |
831 | if (!sec->used_by_bfd) |
832 | { | |
833 | struct _mmix_elf_section_data *sdata; | |
834 | bfd_size_type amt = sizeof (*sdata); | |
f0abc2a1 | 835 | |
f592407e AM |
836 | sdata = bfd_zalloc (abfd, amt); |
837 | if (sdata == NULL) | |
838 | return FALSE; | |
839 | sec->used_by_bfd = sdata; | |
840 | } | |
f0abc2a1 AM |
841 | |
842 | return _bfd_elf_new_section_hook (abfd, sec); | |
843 | } | |
844 | ||
3c3bdf30 NC |
845 | |
846 | /* This function performs the actual bitfiddling and sanity check for a | |
847 | final relocation. Each relocation gets its *worst*-case expansion | |
848 | in size when it arrives here; any reduction in size should have been | |
849 | caught in linker relaxation earlier. When we get here, the relocation | |
850 | looks like the smallest instruction with SWYM:s (nop:s) appended to the | |
851 | max size. We fill in those nop:s. | |
852 | ||
853 | R_MMIX_GETA: (FIXME: Relaxation should break this up in 1, 2, 3 tetra) | |
854 | GETA $N,foo | |
855 | -> | |
856 | SETL $N,foo & 0xffff | |
857 | INCML $N,(foo >> 16) & 0xffff | |
858 | INCMH $N,(foo >> 32) & 0xffff | |
859 | INCH $N,(foo >> 48) & 0xffff | |
860 | ||
861 | R_MMIX_CBRANCH: (FIXME: Relaxation should break this up, but | |
862 | condbranches needing relaxation might be rare enough to not be | |
863 | worthwhile.) | |
864 | [P]Bcc $N,foo | |
865 | -> | |
866 | [~P]B~cc $N,.+20 | |
867 | SETL $255,foo & ... | |
868 | INCML ... | |
869 | INCMH ... | |
870 | INCH ... | |
871 | GO $255,$255,0 | |
872 | ||
873 | R_MMIX_PUSHJ: (FIXME: Relaxation...) | |
874 | PUSHJ $N,foo | |
875 | -> | |
876 | SETL $255,foo & ... | |
877 | INCML ... | |
878 | INCMH ... | |
879 | INCH ... | |
880 | PUSHGO $N,$255,0 | |
881 | ||
882 | R_MMIX_JMP: (FIXME: Relaxation...) | |
883 | JMP foo | |
884 | -> | |
885 | SETL $255,foo & ... | |
886 | INCML ... | |
887 | INCMH ... | |
888 | INCH ... | |
889 | GO $255,$255,0 | |
890 | ||
891 | R_MMIX_ADDR19 and R_MMIX_ADDR27 are just filled in. */ | |
892 | ||
893 | static bfd_reloc_status_type | |
18978b27 HPN |
894 | mmix_elf_perform_relocation (asection *isec, reloc_howto_type *howto, |
895 | void *datap, bfd_vma addr, bfd_vma value, | |
896 | char **error_message) | |
3c3bdf30 NC |
897 | { |
898 | bfd *abfd = isec->owner; | |
899 | bfd_reloc_status_type flag = bfd_reloc_ok; | |
900 | bfd_reloc_status_type r; | |
901 | int offs = 0; | |
902 | int reg = 255; | |
903 | ||
904 | /* The worst case bits are all similar SETL/INCML/INCMH/INCH sequences. | |
905 | We handle the differences here and the common sequence later. */ | |
906 | switch (howto->type) | |
907 | { | |
908 | case R_MMIX_GETA: | |
909 | offs = 0; | |
910 | reg = bfd_get_8 (abfd, (bfd_byte *) datap + 1); | |
911 | ||
912 | /* We change to an absolute value. */ | |
913 | value += addr; | |
914 | break; | |
915 | ||
916 | case R_MMIX_CBRANCH: | |
917 | { | |
918 | int in1 = bfd_get_16 (abfd, (bfd_byte *) datap) << 16; | |
919 | ||
920 | /* Invert the condition and prediction bit, and set the offset | |
921 | to five instructions ahead. | |
922 | ||
923 | We *can* do better if we want to. If the branch is found to be | |
924 | within limits, we could leave the branch as is; there'll just | |
925 | be a bunch of NOP:s after it. But we shouldn't see this | |
926 | sequence often enough that it's worth doing it. */ | |
927 | ||
928 | bfd_put_32 (abfd, | |
929 | (((in1 ^ ((PRED_INV_BIT | COND_INV_BIT) << 24)) & ~0xffff) | |
930 | | (24/4)), | |
931 | (bfd_byte *) datap); | |
932 | ||
933 | /* Put a "GO $255,$255,0" after the common sequence. */ | |
934 | bfd_put_32 (abfd, | |
935 | ((GO_INSN_BYTE | IMM_OFFSET_BIT) << 24) | 0xffff00, | |
936 | (bfd_byte *) datap + 20); | |
937 | ||
938 | /* Common sequence starts at offset 4. */ | |
939 | offs = 4; | |
940 | ||
941 | /* We change to an absolute value. */ | |
942 | value += addr; | |
943 | } | |
944 | break; | |
945 | ||
f60ebe14 HPN |
946 | case R_MMIX_PUSHJ_STUBBABLE: |
947 | /* If the address fits, we're fine. */ | |
948 | if ((value & 3) == 0 | |
949 | /* Note rightshift 0; see R_MMIX_JMP case below. */ | |
950 | && (r = bfd_check_overflow (complain_overflow_signed, | |
951 | howto->bitsize, | |
952 | 0, | |
953 | bfd_arch_bits_per_address (abfd), | |
954 | value)) == bfd_reloc_ok) | |
955 | goto pcrel_mmix_reloc_fits; | |
956 | else | |
957 | { | |
1a23a9e6 | 958 | bfd_size_type size = isec->rawsize ? isec->rawsize : isec->size; |
f60ebe14 HPN |
959 | |
960 | /* We have the bytes at the PUSHJ insn and need to get the | |
961 | position for the stub. There's supposed to be room allocated | |
962 | for the stub. */ | |
963 | bfd_byte *stubcontents | |
f075ee0c | 964 | = ((bfd_byte *) datap |
f60ebe14 | 965 | - (addr - (isec->output_section->vma + isec->output_offset)) |
eea6121a | 966 | + size |
f60ebe14 HPN |
967 | + mmix_elf_section_data (isec)->pjs.stub_offset); |
968 | bfd_vma stubaddr; | |
969 | ||
18978b27 HPN |
970 | if (mmix_elf_section_data (isec)->pjs.n_pushj_relocs == 0) |
971 | { | |
972 | /* This shouldn't happen when linking to ELF or mmo, so | |
973 | this is an attempt to link to "binary", right? We | |
974 | can't access the output bfd, so we can't verify that | |
975 | assumption. We only know that the critical | |
976 | mmix_elf_check_common_relocs has not been called, | |
977 | which happens when the output format is different | |
978 | from the input format (and is not mmo). */ | |
979 | if (! mmix_elf_section_data (isec)->has_warned_pushj) | |
980 | { | |
981 | /* For the first such error per input section, produce | |
982 | a verbose message. */ | |
983 | *error_message | |
984 | = _("invalid input relocation when producing" | |
985 | " non-ELF, non-mmo format output." | |
986 | "\n Please use the objcopy program to convert from" | |
987 | " ELF or mmo," | |
988 | "\n or assemble using" | |
989 | " \"-no-expand\" (for gcc, \"-Wa,-no-expand\""); | |
990 | mmix_elf_section_data (isec)->has_warned_pushj = TRUE; | |
991 | return bfd_reloc_dangerous; | |
992 | } | |
993 | ||
994 | /* For subsequent errors, return this one, which is | |
995 | rate-limited but looks a little bit different, | |
996 | hopefully without affecting user-friendliness. */ | |
997 | return bfd_reloc_overflow; | |
998 | } | |
999 | ||
f60ebe14 HPN |
1000 | /* The address doesn't fit, so redirect the PUSHJ to the |
1001 | location of the stub. */ | |
1002 | r = mmix_elf_perform_relocation (isec, | |
1003 | &elf_mmix_howto_table | |
1004 | [R_MMIX_ADDR19], | |
1005 | datap, | |
1006 | addr, | |
1007 | isec->output_section->vma | |
1008 | + isec->output_offset | |
eea6121a | 1009 | + size |
f60ebe14 HPN |
1010 | + (mmix_elf_section_data (isec) |
1011 | ->pjs.stub_offset) | |
18978b27 HPN |
1012 | - addr, |
1013 | error_message); | |
f60ebe14 HPN |
1014 | if (r != bfd_reloc_ok) |
1015 | return r; | |
1016 | ||
1017 | stubaddr | |
1018 | = (isec->output_section->vma | |
1019 | + isec->output_offset | |
eea6121a | 1020 | + size |
f60ebe14 HPN |
1021 | + mmix_elf_section_data (isec)->pjs.stub_offset); |
1022 | ||
1023 | /* We generate a simple JMP if that suffices, else the whole 5 | |
1024 | insn stub. */ | |
1025 | if (bfd_check_overflow (complain_overflow_signed, | |
1026 | elf_mmix_howto_table[R_MMIX_ADDR27].bitsize, | |
1027 | 0, | |
1028 | bfd_arch_bits_per_address (abfd), | |
1029 | addr + value - stubaddr) == bfd_reloc_ok) | |
1030 | { | |
1031 | bfd_put_32 (abfd, JMP_INSN_BYTE << 24, stubcontents); | |
1032 | r = mmix_elf_perform_relocation (isec, | |
1033 | &elf_mmix_howto_table | |
1034 | [R_MMIX_ADDR27], | |
1035 | stubcontents, | |
1036 | stubaddr, | |
18978b27 HPN |
1037 | value + addr - stubaddr, |
1038 | error_message); | |
f60ebe14 HPN |
1039 | mmix_elf_section_data (isec)->pjs.stub_offset += 4; |
1040 | ||
eea6121a AM |
1041 | if (size + mmix_elf_section_data (isec)->pjs.stub_offset |
1042 | > isec->size) | |
f60ebe14 HPN |
1043 | abort (); |
1044 | ||
1045 | return r; | |
1046 | } | |
1047 | else | |
1048 | { | |
1049 | /* Put a "GO $255,0" after the common sequence. */ | |
1050 | bfd_put_32 (abfd, | |
1051 | ((GO_INSN_BYTE | IMM_OFFSET_BIT) << 24) | |
1052 | | 0xff00, (bfd_byte *) stubcontents + 16); | |
1053 | ||
1054 | /* Prepare for the general code to set the first part of the | |
1055 | linker stub, and */ | |
1056 | value += addr; | |
1057 | datap = stubcontents; | |
1058 | mmix_elf_section_data (isec)->pjs.stub_offset | |
1059 | += MAX_PUSHJ_STUB_SIZE; | |
1060 | } | |
1061 | } | |
1062 | break; | |
1063 | ||
3c3bdf30 NC |
1064 | case R_MMIX_PUSHJ: |
1065 | { | |
1066 | int inreg = bfd_get_8 (abfd, (bfd_byte *) datap + 1); | |
1067 | ||
1068 | /* Put a "PUSHGO $N,$255,0" after the common sequence. */ | |
1069 | bfd_put_32 (abfd, | |
1070 | ((PUSHGO_INSN_BYTE | IMM_OFFSET_BIT) << 24) | |
1071 | | (inreg << 16) | |
1072 | | 0xff00, | |
1073 | (bfd_byte *) datap + 16); | |
1074 | ||
1075 | /* We change to an absolute value. */ | |
1076 | value += addr; | |
1077 | } | |
1078 | break; | |
1079 | ||
1080 | case R_MMIX_JMP: | |
1081 | /* This one is a little special. If we get here on a non-relaxing | |
1082 | link, and the destination is actually in range, we don't need to | |
1083 | execute the nops. | |
1084 | If so, we fall through to the bit-fiddling relocs. | |
1085 | ||
1086 | FIXME: bfd_check_overflow seems broken; the relocation is | |
1087 | rightshifted before testing, so supply a zero rightshift. */ | |
1088 | ||
1089 | if (! ((value & 3) == 0 | |
1090 | && (r = bfd_check_overflow (complain_overflow_signed, | |
1091 | howto->bitsize, | |
1092 | 0, | |
1093 | bfd_arch_bits_per_address (abfd), | |
1094 | value)) == bfd_reloc_ok)) | |
1095 | { | |
1096 | /* If the relocation doesn't fit in a JMP, we let the NOP:s be | |
1097 | modified below, and put a "GO $255,$255,0" after the | |
1098 | address-loading sequence. */ | |
1099 | bfd_put_32 (abfd, | |
1100 | ((GO_INSN_BYTE | IMM_OFFSET_BIT) << 24) | |
1101 | | 0xffff00, | |
1102 | (bfd_byte *) datap + 16); | |
1103 | ||
1104 | /* We change to an absolute value. */ | |
1105 | value += addr; | |
1106 | break; | |
1107 | } | |
cedb70c5 | 1108 | /* FALLTHROUGH. */ |
3c3bdf30 NC |
1109 | case R_MMIX_ADDR19: |
1110 | case R_MMIX_ADDR27: | |
f60ebe14 | 1111 | pcrel_mmix_reloc_fits: |
3c3bdf30 NC |
1112 | /* These must be in range, or else we emit an error. */ |
1113 | if ((value & 3) == 0 | |
1114 | /* Note rightshift 0; see above. */ | |
1115 | && (r = bfd_check_overflow (complain_overflow_signed, | |
1116 | howto->bitsize, | |
1117 | 0, | |
1118 | bfd_arch_bits_per_address (abfd), | |
1119 | value)) == bfd_reloc_ok) | |
1120 | { | |
1121 | bfd_vma in1 | |
1122 | = bfd_get_32 (abfd, (bfd_byte *) datap); | |
1123 | bfd_vma highbit; | |
1124 | ||
1125 | if ((bfd_signed_vma) value < 0) | |
1126 | { | |
f60ebe14 | 1127 | highbit = 1 << 24; |
3c3bdf30 NC |
1128 | value += (1 << (howto->bitsize - 1)); |
1129 | } | |
1130 | else | |
1131 | highbit = 0; | |
1132 | ||
1133 | value >>= 2; | |
1134 | ||
1135 | bfd_put_32 (abfd, | |
930b4cb2 | 1136 | (in1 & howto->src_mask) |
3c3bdf30 NC |
1137 | | highbit |
1138 | | (value & howto->dst_mask), | |
1139 | (bfd_byte *) datap); | |
1140 | ||
1141 | return bfd_reloc_ok; | |
1142 | } | |
1143 | else | |
1144 | return bfd_reloc_overflow; | |
1145 | ||
930b4cb2 HPN |
1146 | case R_MMIX_BASE_PLUS_OFFSET: |
1147 | { | |
1148 | struct bpo_reloc_section_info *bpodata | |
f0abc2a1 | 1149 | = mmix_elf_section_data (isec)->bpo.reloc; |
18978b27 HPN |
1150 | asection *bpo_greg_section; |
1151 | struct bpo_greg_section_info *gregdata; | |
1152 | size_t bpo_index; | |
1153 | ||
1154 | if (bpodata == NULL) | |
1155 | { | |
1156 | /* This shouldn't happen when linking to ELF or mmo, so | |
1157 | this is an attempt to link to "binary", right? We | |
1158 | can't access the output bfd, so we can't verify that | |
1159 | assumption. We only know that the critical | |
1160 | mmix_elf_check_common_relocs has not been called, which | |
1161 | happens when the output format is different from the | |
1162 | input format (and is not mmo). */ | |
1163 | if (! mmix_elf_section_data (isec)->has_warned_bpo) | |
1164 | { | |
1165 | /* For the first such error per input section, produce | |
1166 | a verbose message. */ | |
1167 | *error_message | |
1168 | = _("invalid input relocation when producing" | |
1169 | " non-ELF, non-mmo format output." | |
1170 | "\n Please use the objcopy program to convert from" | |
1171 | " ELF or mmo," | |
1172 | "\n or compile using the gcc-option" | |
1173 | " \"-mno-base-addresses\"."); | |
1174 | mmix_elf_section_data (isec)->has_warned_bpo = TRUE; | |
1175 | return bfd_reloc_dangerous; | |
1176 | } | |
1177 | ||
1178 | /* For subsequent errors, return this one, which is | |
1179 | rate-limited but looks a little bit different, | |
1180 | hopefully without affecting user-friendliness. */ | |
1181 | return bfd_reloc_overflow; | |
1182 | } | |
1183 | ||
1184 | bpo_greg_section = bpodata->bpo_greg_section; | |
1185 | gregdata = mmix_elf_section_data (bpo_greg_section)->bpo.greg; | |
1186 | bpo_index = gregdata->bpo_reloc_indexes[bpodata->bpo_index++]; | |
930b4cb2 HPN |
1187 | |
1188 | /* A consistency check: The value we now have in "relocation" must | |
1189 | be the same as the value we stored for that relocation. It | |
1190 | doesn't cost much, so can be left in at all times. */ | |
1191 | if (value != gregdata->reloc_request[bpo_index].value) | |
1192 | { | |
4eca0228 | 1193 | _bfd_error_handler |
695344c0 | 1194 | /* xgettext:c-format */ |
dae82561 | 1195 | (_("%B: Internal inconsistency error for value for\n\ |
d42c267e | 1196 | linker-allocated global register: linked: %#Lx != relaxed: %#Lx"), |
dae82561 | 1197 | isec->owner, |
d42c267e AM |
1198 | value, |
1199 | gregdata->reloc_request[bpo_index].value); | |
930b4cb2 HPN |
1200 | bfd_set_error (bfd_error_bad_value); |
1201 | return bfd_reloc_overflow; | |
1202 | } | |
1203 | ||
1204 | /* Then store the register number and offset for that register | |
1205 | into datap and datap + 1 respectively. */ | |
1206 | bfd_put_8 (abfd, | |
1207 | gregdata->reloc_request[bpo_index].regindex | |
1208 | + bpo_greg_section->output_section->vma / 8, | |
1209 | datap); | |
1210 | bfd_put_8 (abfd, | |
1211 | gregdata->reloc_request[bpo_index].offset, | |
1212 | ((unsigned char *) datap) + 1); | |
1213 | return bfd_reloc_ok; | |
1214 | } | |
1215 | ||
3c3bdf30 NC |
1216 | case R_MMIX_REG_OR_BYTE: |
1217 | case R_MMIX_REG: | |
1218 | if (value > 255) | |
1219 | return bfd_reloc_overflow; | |
1220 | bfd_put_8 (abfd, value, datap); | |
1221 | return bfd_reloc_ok; | |
1222 | ||
1223 | default: | |
1224 | BAD_CASE (howto->type); | |
1225 | } | |
1226 | ||
1227 | /* This code adds the common SETL/INCML/INCMH/INCH worst-case | |
1228 | sequence. */ | |
1229 | ||
1230 | /* Lowest two bits must be 0. We return bfd_reloc_overflow for | |
1231 | everything that looks strange. */ | |
1232 | if (value & 3) | |
1233 | flag = bfd_reloc_overflow; | |
1234 | ||
1235 | bfd_put_32 (abfd, | |
1236 | (SETL_INSN_BYTE << 24) | (value & 0xffff) | (reg << 16), | |
1237 | (bfd_byte *) datap + offs); | |
1238 | bfd_put_32 (abfd, | |
1239 | (INCML_INSN_BYTE << 24) | ((value >> 16) & 0xffff) | (reg << 16), | |
1240 | (bfd_byte *) datap + offs + 4); | |
1241 | bfd_put_32 (abfd, | |
1242 | (INCMH_INSN_BYTE << 24) | ((value >> 32) & 0xffff) | (reg << 16), | |
1243 | (bfd_byte *) datap + offs + 8); | |
1244 | bfd_put_32 (abfd, | |
1245 | (INCH_INSN_BYTE << 24) | ((value >> 48) & 0xffff) | (reg << 16), | |
1246 | (bfd_byte *) datap + offs + 12); | |
1247 | ||
1248 | return flag; | |
1249 | } | |
1250 | ||
1251 | /* Set the howto pointer for an MMIX ELF reloc (type RELA). */ | |
1252 | ||
1253 | static void | |
2c3fc389 NC |
1254 | mmix_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED, |
1255 | arelent *cache_ptr, | |
1256 | Elf_Internal_Rela *dst) | |
3c3bdf30 NC |
1257 | { |
1258 | unsigned int r_type; | |
1259 | ||
1260 | r_type = ELF64_R_TYPE (dst->r_info); | |
5860e3f8 NC |
1261 | if (r_type >= (unsigned int) R_MMIX_max) |
1262 | { | |
695344c0 | 1263 | /* xgettext:c-format */ |
64d29018 | 1264 | _bfd_error_handler (_("%B: invalid MMIX reloc number: %d"), abfd, r_type); |
5860e3f8 NC |
1265 | r_type = 0; |
1266 | } | |
3c3bdf30 NC |
1267 | cache_ptr->howto = &elf_mmix_howto_table[r_type]; |
1268 | } | |
1269 | ||
1270 | /* Any MMIX-specific relocation gets here at assembly time or when linking | |
1271 | to other formats (such as mmo); this is the relocation function from | |
1272 | the reloc_table. We don't get here for final pure ELF linking. */ | |
1273 | ||
1274 | static bfd_reloc_status_type | |
2c3fc389 NC |
1275 | mmix_elf_reloc (bfd *abfd, |
1276 | arelent *reloc_entry, | |
1277 | asymbol *symbol, | |
1278 | void * data, | |
1279 | asection *input_section, | |
1280 | bfd *output_bfd, | |
1281 | char **error_message) | |
3c3bdf30 NC |
1282 | { |
1283 | bfd_vma relocation; | |
1284 | bfd_reloc_status_type r; | |
1285 | asection *reloc_target_output_section; | |
1286 | bfd_reloc_status_type flag = bfd_reloc_ok; | |
1287 | bfd_vma output_base = 0; | |
3c3bdf30 NC |
1288 | |
1289 | r = bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, | |
1290 | input_section, output_bfd, error_message); | |
1291 | ||
1292 | /* If that was all that was needed (i.e. this isn't a final link, only | |
1293 | some segment adjustments), we're done. */ | |
1294 | if (r != bfd_reloc_continue) | |
1295 | return r; | |
1296 | ||
1297 | if (bfd_is_und_section (symbol->section) | |
1298 | && (symbol->flags & BSF_WEAK) == 0 | |
1299 | && output_bfd == (bfd *) NULL) | |
1300 | return bfd_reloc_undefined; | |
1301 | ||
1302 | /* Is the address of the relocation really within the section? */ | |
07515404 | 1303 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
3c3bdf30 NC |
1304 | return bfd_reloc_outofrange; |
1305 | ||
4cc11e76 | 1306 | /* Work out which section the relocation is targeted at and the |
3c3bdf30 NC |
1307 | initial relocation command value. */ |
1308 | ||
1309 | /* Get symbol value. (Common symbols are special.) */ | |
1310 | if (bfd_is_com_section (symbol->section)) | |
1311 | relocation = 0; | |
1312 | else | |
1313 | relocation = symbol->value; | |
1314 | ||
1315 | reloc_target_output_section = bfd_get_output_section (symbol); | |
1316 | ||
1317 | /* Here the variable relocation holds the final address of the symbol we | |
1318 | are relocating against, plus any addend. */ | |
1319 | if (output_bfd) | |
1320 | output_base = 0; | |
1321 | else | |
1322 | output_base = reloc_target_output_section->vma; | |
1323 | ||
1324 | relocation += output_base + symbol->section->output_offset; | |
1325 | ||
3c3bdf30 NC |
1326 | if (output_bfd != (bfd *) NULL) |
1327 | { | |
1328 | /* Add in supplied addend. */ | |
1329 | relocation += reloc_entry->addend; | |
1330 | ||
1331 | /* This is a partial relocation, and we want to apply the | |
1332 | relocation to the reloc entry rather than the raw data. | |
1333 | Modify the reloc inplace to reflect what we now know. */ | |
1334 | reloc_entry->addend = relocation; | |
1335 | reloc_entry->address += input_section->output_offset; | |
1336 | return flag; | |
1337 | } | |
1338 | ||
1339 | return mmix_final_link_relocate (reloc_entry->howto, input_section, | |
1340 | data, reloc_entry->address, | |
1341 | reloc_entry->addend, relocation, | |
1342 | bfd_asymbol_name (symbol), | |
18978b27 HPN |
1343 | reloc_target_output_section, |
1344 | error_message); | |
3c3bdf30 | 1345 | } |
e06fcc86 | 1346 | \f |
3c3bdf30 NC |
1347 | /* Relocate an MMIX ELF section. Modified from elf32-fr30.c; look to it |
1348 | for guidance if you're thinking of copying this. */ | |
1349 | ||
b34976b6 | 1350 | static bfd_boolean |
2c3fc389 NC |
1351 | mmix_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED, |
1352 | struct bfd_link_info *info, | |
1353 | bfd *input_bfd, | |
1354 | asection *input_section, | |
1355 | bfd_byte *contents, | |
1356 | Elf_Internal_Rela *relocs, | |
1357 | Elf_Internal_Sym *local_syms, | |
1358 | asection **local_sections) | |
3c3bdf30 NC |
1359 | { |
1360 | Elf_Internal_Shdr *symtab_hdr; | |
1361 | struct elf_link_hash_entry **sym_hashes; | |
1362 | Elf_Internal_Rela *rel; | |
1363 | Elf_Internal_Rela *relend; | |
1a23a9e6 | 1364 | bfd_size_type size; |
f60ebe14 | 1365 | size_t pjsno = 0; |
3c3bdf30 | 1366 | |
1a23a9e6 | 1367 | size = input_section->rawsize ? input_section->rawsize : input_section->size; |
3c3bdf30 NC |
1368 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
1369 | sym_hashes = elf_sym_hashes (input_bfd); | |
1370 | relend = relocs + input_section->reloc_count; | |
1371 | ||
1a23a9e6 AM |
1372 | /* Zero the stub area before we start. */ |
1373 | if (input_section->rawsize != 0 | |
1374 | && input_section->size > input_section->rawsize) | |
1375 | memset (contents + input_section->rawsize, 0, | |
1376 | input_section->size - input_section->rawsize); | |
1377 | ||
3c3bdf30 NC |
1378 | for (rel = relocs; rel < relend; rel ++) |
1379 | { | |
1380 | reloc_howto_type *howto; | |
1381 | unsigned long r_symndx; | |
1382 | Elf_Internal_Sym *sym; | |
1383 | asection *sec; | |
1384 | struct elf_link_hash_entry *h; | |
1385 | bfd_vma relocation; | |
1386 | bfd_reloc_status_type r; | |
1387 | const char *name = NULL; | |
1388 | int r_type; | |
b34976b6 | 1389 | bfd_boolean undefined_signalled = FALSE; |
3c3bdf30 NC |
1390 | |
1391 | r_type = ELF64_R_TYPE (rel->r_info); | |
1392 | ||
1393 | if (r_type == R_MMIX_GNU_VTINHERIT | |
1394 | || r_type == R_MMIX_GNU_VTENTRY) | |
1395 | continue; | |
1396 | ||
1397 | r_symndx = ELF64_R_SYM (rel->r_info); | |
1398 | ||
ab96bf03 AM |
1399 | howto = elf_mmix_howto_table + ELF64_R_TYPE (rel->r_info); |
1400 | h = NULL; | |
1401 | sym = NULL; | |
1402 | sec = NULL; | |
1403 | ||
1404 | if (r_symndx < symtab_hdr->sh_info) | |
1405 | { | |
1406 | sym = local_syms + r_symndx; | |
1407 | sec = local_sections [r_symndx]; | |
1408 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); | |
1409 | ||
1410 | name = bfd_elf_string_from_elf_section (input_bfd, | |
1411 | symtab_hdr->sh_link, | |
1412 | sym->st_name); | |
1413 | if (name == NULL) | |
1414 | name = bfd_section_name (input_bfd, sec); | |
1415 | } | |
1416 | else | |
1417 | { | |
62d887d4 | 1418 | bfd_boolean unresolved_reloc, ignored; |
ab96bf03 AM |
1419 | |
1420 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, | |
1421 | r_symndx, symtab_hdr, sym_hashes, | |
1422 | h, sec, relocation, | |
62d887d4 L |
1423 | unresolved_reloc, undefined_signalled, |
1424 | ignored); | |
ab96bf03 AM |
1425 | name = h->root.root.string; |
1426 | } | |
1427 | ||
dbaa2011 | 1428 | if (sec != NULL && discarded_section (sec)) |
e4067dbb | 1429 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
545fd46b | 1430 | rel, 1, relend, howto, 0, contents); |
ab96bf03 | 1431 | |
0e1862bb | 1432 | if (bfd_link_relocatable (info)) |
3c3bdf30 | 1433 | { |
f60ebe14 HPN |
1434 | /* This is a relocatable link. For most relocs we don't have to |
1435 | change anything, unless the reloc is against a section | |
1436 | symbol, in which case we have to adjust according to where | |
1437 | the section symbol winds up in the output section. */ | |
ab96bf03 AM |
1438 | if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
1439 | rel->r_addend += sec->output_offset; | |
3c3bdf30 | 1440 | |
f60ebe14 HPN |
1441 | /* For PUSHJ stub relocs however, we may need to change the |
1442 | reloc and the section contents, if the reloc doesn't reach | |
1443 | beyond the end of the output section and previous stubs. | |
1444 | Then we change the section contents to be a PUSHJ to the end | |
1445 | of the input section plus stubs (we can do that without using | |
1446 | a reloc), and then we change the reloc to be a R_MMIX_PUSHJ | |
1447 | at the stub location. */ | |
1448 | if (r_type == R_MMIX_PUSHJ_STUBBABLE) | |
1449 | { | |
1450 | /* We've already checked whether we need a stub; use that | |
1451 | knowledge. */ | |
1452 | if (mmix_elf_section_data (input_section)->pjs.stub_size[pjsno] | |
1453 | != 0) | |
1454 | { | |
1455 | Elf_Internal_Rela relcpy; | |
1456 | ||
1457 | if (mmix_elf_section_data (input_section) | |
1458 | ->pjs.stub_size[pjsno] != MAX_PUSHJ_STUB_SIZE) | |
1459 | abort (); | |
1460 | ||
1461 | /* There's already a PUSHJ insn there, so just fill in | |
1462 | the offset bits to the stub. */ | |
1463 | if (mmix_final_link_relocate (elf_mmix_howto_table | |
1464 | + R_MMIX_ADDR19, | |
1465 | input_section, | |
1466 | contents, | |
1467 | rel->r_offset, | |
1468 | 0, | |
1469 | input_section | |
1470 | ->output_section->vma | |
1471 | + input_section->output_offset | |
eea6121a | 1472 | + size |
f60ebe14 HPN |
1473 | + mmix_elf_section_data (input_section) |
1474 | ->pjs.stub_offset, | |
18978b27 | 1475 | NULL, NULL, NULL) != bfd_reloc_ok) |
f60ebe14 HPN |
1476 | return FALSE; |
1477 | ||
1478 | /* Put a JMP insn at the stub; it goes with the | |
1479 | R_MMIX_JMP reloc. */ | |
1480 | bfd_put_32 (output_bfd, JMP_INSN_BYTE << 24, | |
1481 | contents | |
eea6121a | 1482 | + size |
f60ebe14 HPN |
1483 | + mmix_elf_section_data (input_section) |
1484 | ->pjs.stub_offset); | |
1485 | ||
1486 | /* Change the reloc to be at the stub, and to a full | |
1487 | R_MMIX_JMP reloc. */ | |
1488 | rel->r_info = ELF64_R_INFO (r_symndx, R_MMIX_JMP); | |
1489 | rel->r_offset | |
eea6121a | 1490 | = (size |
f60ebe14 HPN |
1491 | + mmix_elf_section_data (input_section) |
1492 | ->pjs.stub_offset); | |
1493 | ||
1494 | mmix_elf_section_data (input_section)->pjs.stub_offset | |
1495 | += MAX_PUSHJ_STUB_SIZE; | |
1496 | ||
1497 | /* Shift this reloc to the end of the relocs to maintain | |
1498 | the r_offset sorted reloc order. */ | |
1499 | relcpy = *rel; | |
1500 | memmove (rel, rel + 1, (char *) relend - (char *) rel); | |
1501 | relend[-1] = relcpy; | |
1502 | ||
1503 | /* Back up one reloc, or else we'd skip the next reloc | |
1504 | in turn. */ | |
1505 | rel--; | |
1506 | } | |
1507 | ||
1508 | pjsno++; | |
1509 | } | |
3c3bdf30 NC |
1510 | continue; |
1511 | } | |
1512 | ||
3c3bdf30 NC |
1513 | r = mmix_final_link_relocate (howto, input_section, |
1514 | contents, rel->r_offset, | |
18978b27 | 1515 | rel->r_addend, relocation, name, sec, NULL); |
3c3bdf30 NC |
1516 | |
1517 | if (r != bfd_reloc_ok) | |
1518 | { | |
3c3bdf30 NC |
1519 | const char * msg = (const char *) NULL; |
1520 | ||
1521 | switch (r) | |
1522 | { | |
1523 | case bfd_reloc_overflow: | |
1a72702b | 1524 | info->callbacks->reloc_overflow |
dfeffb9f L |
1525 | (info, (h ? &h->root : NULL), name, howto->name, |
1526 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
3c3bdf30 NC |
1527 | break; |
1528 | ||
1529 | case bfd_reloc_undefined: | |
1530 | /* We may have sent this message above. */ | |
1531 | if (! undefined_signalled) | |
1a72702b AM |
1532 | info->callbacks->undefined_symbol |
1533 | (info, name, input_bfd, input_section, rel->r_offset, TRUE); | |
b34976b6 | 1534 | undefined_signalled = TRUE; |
3c3bdf30 NC |
1535 | break; |
1536 | ||
1537 | case bfd_reloc_outofrange: | |
1538 | msg = _("internal error: out of range error"); | |
1539 | break; | |
1540 | ||
1541 | case bfd_reloc_notsupported: | |
1542 | msg = _("internal error: unsupported relocation error"); | |
1543 | break; | |
1544 | ||
1545 | case bfd_reloc_dangerous: | |
1546 | msg = _("internal error: dangerous relocation"); | |
1547 | break; | |
1548 | ||
1549 | default: | |
1550 | msg = _("internal error: unknown error"); | |
1551 | break; | |
1552 | } | |
1553 | ||
1554 | if (msg) | |
1a72702b AM |
1555 | (*info->callbacks->warning) (info, msg, name, input_bfd, |
1556 | input_section, rel->r_offset); | |
3c3bdf30 NC |
1557 | } |
1558 | } | |
1559 | ||
b34976b6 | 1560 | return TRUE; |
3c3bdf30 | 1561 | } |
e06fcc86 | 1562 | \f |
3c3bdf30 NC |
1563 | /* Perform a single relocation. By default we use the standard BFD |
1564 | routines. A few relocs we have to do ourselves. */ | |
1565 | ||
1566 | static bfd_reloc_status_type | |
18978b27 HPN |
1567 | mmix_final_link_relocate (reloc_howto_type *howto, asection *input_section, |
1568 | bfd_byte *contents, bfd_vma r_offset, | |
1569 | bfd_signed_vma r_addend, bfd_vma relocation, | |
1570 | const char *symname, asection *symsec, | |
1571 | char **error_message) | |
3c3bdf30 NC |
1572 | { |
1573 | bfd_reloc_status_type r = bfd_reloc_ok; | |
1574 | bfd_vma addr | |
1575 | = (input_section->output_section->vma | |
1576 | + input_section->output_offset | |
1577 | + r_offset); | |
1578 | bfd_signed_vma srel | |
1579 | = (bfd_signed_vma) relocation + r_addend; | |
1580 | ||
1581 | switch (howto->type) | |
1582 | { | |
1583 | /* All these are PC-relative. */ | |
f60ebe14 | 1584 | case R_MMIX_PUSHJ_STUBBABLE: |
3c3bdf30 NC |
1585 | case R_MMIX_PUSHJ: |
1586 | case R_MMIX_CBRANCH: | |
1587 | case R_MMIX_ADDR19: | |
1588 | case R_MMIX_GETA: | |
1589 | case R_MMIX_ADDR27: | |
1590 | case R_MMIX_JMP: | |
1591 | contents += r_offset; | |
1592 | ||
1593 | srel -= (input_section->output_section->vma | |
1594 | + input_section->output_offset | |
1595 | + r_offset); | |
1596 | ||
1597 | r = mmix_elf_perform_relocation (input_section, howto, contents, | |
18978b27 | 1598 | addr, srel, error_message); |
3c3bdf30 NC |
1599 | break; |
1600 | ||
930b4cb2 HPN |
1601 | case R_MMIX_BASE_PLUS_OFFSET: |
1602 | if (symsec == NULL) | |
1603 | return bfd_reloc_undefined; | |
1604 | ||
1605 | /* Check that we're not relocating against a register symbol. */ | |
1606 | if (strcmp (bfd_get_section_name (symsec->owner, symsec), | |
1607 | MMIX_REG_CONTENTS_SECTION_NAME) == 0 | |
1608 | || strcmp (bfd_get_section_name (symsec->owner, symsec), | |
1609 | MMIX_REG_SECTION_NAME) == 0) | |
1610 | { | |
1611 | /* Note: This is separated out into two messages in order | |
1612 | to ease the translation into other languages. */ | |
1613 | if (symname == NULL || *symname == 0) | |
4eca0228 | 1614 | _bfd_error_handler |
695344c0 | 1615 | /* xgettext:c-format */ |
dae82561 AM |
1616 | (_("%B: base-plus-offset relocation against register symbol:" |
1617 | " (unknown) in %A"), | |
1618 | input_section->owner, symsec); | |
930b4cb2 | 1619 | else |
4eca0228 | 1620 | _bfd_error_handler |
695344c0 | 1621 | /* xgettext:c-format */ |
dae82561 AM |
1622 | (_("%B: base-plus-offset relocation against register symbol:" |
1623 | " %s in %A"), | |
1624 | input_section->owner, symname, symsec); | |
930b4cb2 HPN |
1625 | return bfd_reloc_overflow; |
1626 | } | |
1627 | goto do_mmix_reloc; | |
1628 | ||
3c3bdf30 NC |
1629 | case R_MMIX_REG_OR_BYTE: |
1630 | case R_MMIX_REG: | |
1631 | /* For now, we handle these alike. They must refer to an register | |
1632 | symbol, which is either relative to the register section and in | |
1633 | the range 0..255, or is in the register contents section with vma | |
1634 | regno * 8. */ | |
1635 | ||
1636 | /* FIXME: A better way to check for reg contents section? | |
1637 | FIXME: Postpone section->scaling to mmix_elf_perform_relocation? */ | |
1638 | if (symsec == NULL) | |
1639 | return bfd_reloc_undefined; | |
1640 | ||
1641 | if (strcmp (bfd_get_section_name (symsec->owner, symsec), | |
1642 | MMIX_REG_CONTENTS_SECTION_NAME) == 0) | |
1643 | { | |
1644 | if ((srel & 7) != 0 || srel < 32*8 || srel > 255*8) | |
1645 | { | |
1646 | /* The bfd_reloc_outofrange return value, though intuitively | |
1647 | a better value, will not get us an error. */ | |
1648 | return bfd_reloc_overflow; | |
1649 | } | |
1650 | srel /= 8; | |
1651 | } | |
1652 | else if (strcmp (bfd_get_section_name (symsec->owner, symsec), | |
1653 | MMIX_REG_SECTION_NAME) == 0) | |
1654 | { | |
1655 | if (srel < 0 || srel > 255) | |
1656 | /* The bfd_reloc_outofrange return value, though intuitively a | |
1657 | better value, will not get us an error. */ | |
1658 | return bfd_reloc_overflow; | |
1659 | } | |
1660 | else | |
1661 | { | |
930b4cb2 | 1662 | /* Note: This is separated out into two messages in order |
ca09e32b NC |
1663 | to ease the translation into other languages. */ |
1664 | if (symname == NULL || *symname == 0) | |
4eca0228 | 1665 | _bfd_error_handler |
695344c0 | 1666 | /* xgettext:c-format */ |
dae82561 AM |
1667 | (_("%B: register relocation against non-register symbol:" |
1668 | " (unknown) in %A"), | |
1669 | input_section->owner, symsec); | |
ca09e32b | 1670 | else |
4eca0228 | 1671 | _bfd_error_handler |
695344c0 | 1672 | /* xgettext:c-format */ |
dae82561 AM |
1673 | (_("%B: register relocation against non-register symbol:" |
1674 | " %s in %A"), | |
1675 | input_section->owner, symname, symsec); | |
3c3bdf30 NC |
1676 | |
1677 | /* The bfd_reloc_outofrange return value, though intuitively a | |
1678 | better value, will not get us an error. */ | |
1679 | return bfd_reloc_overflow; | |
1680 | } | |
930b4cb2 | 1681 | do_mmix_reloc: |
3c3bdf30 NC |
1682 | contents += r_offset; |
1683 | r = mmix_elf_perform_relocation (input_section, howto, contents, | |
18978b27 | 1684 | addr, srel, error_message); |
3c3bdf30 NC |
1685 | break; |
1686 | ||
1687 | case R_MMIX_LOCAL: | |
1688 | /* This isn't a real relocation, it's just an assertion that the | |
1689 | final relocation value corresponds to a local register. We | |
1690 | ignore the actual relocation; nothing is changed. */ | |
1691 | { | |
1692 | asection *regsec | |
1693 | = bfd_get_section_by_name (input_section->output_section->owner, | |
1694 | MMIX_REG_CONTENTS_SECTION_NAME); | |
1695 | bfd_vma first_global; | |
1696 | ||
1697 | /* Check that this is an absolute value, or a reference to the | |
1698 | register contents section or the register (symbol) section. | |
1699 | Absolute numbers can get here as undefined section. Undefined | |
1700 | symbols are signalled elsewhere, so there's no conflict in us | |
1701 | accidentally handling it. */ | |
1702 | if (!bfd_is_abs_section (symsec) | |
1703 | && !bfd_is_und_section (symsec) | |
1704 | && strcmp (bfd_get_section_name (symsec->owner, symsec), | |
1705 | MMIX_REG_CONTENTS_SECTION_NAME) != 0 | |
1706 | && strcmp (bfd_get_section_name (symsec->owner, symsec), | |
1707 | MMIX_REG_SECTION_NAME) != 0) | |
1708 | { | |
4eca0228 | 1709 | _bfd_error_handler |
dae82561 AM |
1710 | (_("%B: directive LOCAL valid only with a register or absolute value"), |
1711 | input_section->owner); | |
3c3bdf30 NC |
1712 | |
1713 | return bfd_reloc_overflow; | |
1714 | } | |
1715 | ||
1716 | /* If we don't have a register contents section, then $255 is the | |
1717 | first global register. */ | |
1718 | if (regsec == NULL) | |
1719 | first_global = 255; | |
1720 | else | |
1721 | { | |
a0f49396 NC |
1722 | first_global |
1723 | = bfd_get_section_vma (input_section->output_section->owner, | |
1724 | regsec) / 8; | |
3c3bdf30 NC |
1725 | if (strcmp (bfd_get_section_name (symsec->owner, symsec), |
1726 | MMIX_REG_CONTENTS_SECTION_NAME) == 0) | |
1727 | { | |
1728 | if ((srel & 7) != 0 || srel < 32*8 || srel > 255*8) | |
1729 | /* The bfd_reloc_outofrange return value, though | |
1730 | intuitively a better value, will not get us an error. */ | |
1731 | return bfd_reloc_overflow; | |
1732 | srel /= 8; | |
1733 | } | |
1734 | } | |
1735 | ||
1736 | if ((bfd_vma) srel >= first_global) | |
1737 | { | |
1738 | /* FIXME: Better error message. */ | |
4eca0228 | 1739 | _bfd_error_handler |
695344c0 | 1740 | /* xgettext:c-format */ |
d42c267e AM |
1741 | (_("%B: LOCAL directive: Register $%Ld is not a local register." |
1742 | " First global register is $%Ld."), | |
1743 | input_section->owner, srel, first_global); | |
3c3bdf30 NC |
1744 | |
1745 | return bfd_reloc_overflow; | |
1746 | } | |
1747 | } | |
1748 | r = bfd_reloc_ok; | |
1749 | break; | |
1750 | ||
1751 | default: | |
1752 | r = _bfd_final_link_relocate (howto, input_section->owner, input_section, | |
1753 | contents, r_offset, | |
1754 | relocation, r_addend); | |
1755 | } | |
1756 | ||
1757 | return r; | |
1758 | } | |
e06fcc86 | 1759 | \f |
3c3bdf30 NC |
1760 | /* Return the section that should be marked against GC for a given |
1761 | relocation. */ | |
1762 | ||
1763 | static asection * | |
07adf181 AM |
1764 | mmix_elf_gc_mark_hook (asection *sec, |
1765 | struct bfd_link_info *info, | |
1766 | Elf_Internal_Rela *rel, | |
1767 | struct elf_link_hash_entry *h, | |
1768 | Elf_Internal_Sym *sym) | |
3c3bdf30 NC |
1769 | { |
1770 | if (h != NULL) | |
07adf181 AM |
1771 | switch (ELF64_R_TYPE (rel->r_info)) |
1772 | { | |
1773 | case R_MMIX_GNU_VTINHERIT: | |
1774 | case R_MMIX_GNU_VTENTRY: | |
1775 | return NULL; | |
1776 | } | |
3c3bdf30 | 1777 | |
07adf181 | 1778 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
3c3bdf30 | 1779 | } |
e06fcc86 | 1780 | \f |
3c3bdf30 NC |
1781 | /* Sort register relocs to come before expanding relocs. */ |
1782 | ||
1783 | static int | |
2c3fc389 | 1784 | mmix_elf_sort_relocs (const void * p1, const void * p2) |
3c3bdf30 NC |
1785 | { |
1786 | const Elf_Internal_Rela *r1 = (const Elf_Internal_Rela *) p1; | |
1787 | const Elf_Internal_Rela *r2 = (const Elf_Internal_Rela *) p2; | |
1788 | int r1_is_reg, r2_is_reg; | |
1789 | ||
1790 | /* Sort primarily on r_offset & ~3, so relocs are done to consecutive | |
1791 | insns. */ | |
1792 | if ((r1->r_offset & ~(bfd_vma) 3) > (r2->r_offset & ~(bfd_vma) 3)) | |
1793 | return 1; | |
1794 | else if ((r1->r_offset & ~(bfd_vma) 3) < (r2->r_offset & ~(bfd_vma) 3)) | |
1795 | return -1; | |
1796 | ||
1797 | r1_is_reg | |
1798 | = (ELF64_R_TYPE (r1->r_info) == R_MMIX_REG_OR_BYTE | |
1799 | || ELF64_R_TYPE (r1->r_info) == R_MMIX_REG); | |
1800 | r2_is_reg | |
1801 | = (ELF64_R_TYPE (r2->r_info) == R_MMIX_REG_OR_BYTE | |
1802 | || ELF64_R_TYPE (r2->r_info) == R_MMIX_REG); | |
1803 | if (r1_is_reg != r2_is_reg) | |
1804 | return r2_is_reg - r1_is_reg; | |
1805 | ||
1806 | /* Neither or both are register relocs. Then sort on full offset. */ | |
1807 | if (r1->r_offset > r2->r_offset) | |
1808 | return 1; | |
1809 | else if (r1->r_offset < r2->r_offset) | |
1810 | return -1; | |
1811 | return 0; | |
1812 | } | |
1813 | ||
930b4cb2 HPN |
1814 | /* Subset of mmix_elf_check_relocs, common to ELF and mmo linking. */ |
1815 | ||
b34976b6 | 1816 | static bfd_boolean |
2c3fc389 NC |
1817 | mmix_elf_check_common_relocs (bfd *abfd, |
1818 | struct bfd_link_info *info, | |
1819 | asection *sec, | |
1820 | const Elf_Internal_Rela *relocs) | |
930b4cb2 HPN |
1821 | { |
1822 | bfd *bpo_greg_owner = NULL; | |
1823 | asection *allocated_gregs_section = NULL; | |
1824 | struct bpo_greg_section_info *gregdata = NULL; | |
1825 | struct bpo_reloc_section_info *bpodata = NULL; | |
1826 | const Elf_Internal_Rela *rel; | |
1827 | const Elf_Internal_Rela *rel_end; | |
1828 | ||
930b4cb2 HPN |
1829 | /* We currently have to abuse this COFF-specific member, since there's |
1830 | no target-machine-dedicated member. There's no alternative outside | |
1831 | the bfd_link_info struct; we can't specialize a hash-table since | |
1832 | they're different between ELF and mmo. */ | |
1833 | bpo_greg_owner = (bfd *) info->base_file; | |
1834 | ||
1835 | rel_end = relocs + sec->reloc_count; | |
1836 | for (rel = relocs; rel < rel_end; rel++) | |
1837 | { | |
1838 | switch (ELF64_R_TYPE (rel->r_info)) | |
1839 | { | |
1840 | /* This relocation causes a GREG allocation. We need to count | |
1841 | them, and we need to create a section for them, so we need an | |
1842 | object to fake as the owner of that section. We can't use | |
1843 | the ELF dynobj for this, since the ELF bits assume lots of | |
1844 | DSO-related stuff if that member is non-NULL. */ | |
1845 | case R_MMIX_BASE_PLUS_OFFSET: | |
f60ebe14 | 1846 | /* We don't do anything with this reloc for a relocatable link. */ |
0e1862bb | 1847 | if (bfd_link_relocatable (info)) |
f60ebe14 HPN |
1848 | break; |
1849 | ||
930b4cb2 HPN |
1850 | if (bpo_greg_owner == NULL) |
1851 | { | |
1852 | bpo_greg_owner = abfd; | |
2c3fc389 | 1853 | info->base_file = bpo_greg_owner; |
930b4cb2 HPN |
1854 | } |
1855 | ||
4fa5c2a8 HPN |
1856 | if (allocated_gregs_section == NULL) |
1857 | allocated_gregs_section | |
1858 | = bfd_get_section_by_name (bpo_greg_owner, | |
1859 | MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME); | |
1860 | ||
930b4cb2 HPN |
1861 | if (allocated_gregs_section == NULL) |
1862 | { | |
1863 | allocated_gregs_section | |
3496cb2a L |
1864 | = bfd_make_section_with_flags (bpo_greg_owner, |
1865 | MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME, | |
1866 | (SEC_HAS_CONTENTS | |
1867 | | SEC_IN_MEMORY | |
1868 | | SEC_LINKER_CREATED)); | |
930b4cb2 HPN |
1869 | /* Setting both SEC_ALLOC and SEC_LOAD means the section is |
1870 | treated like any other section, and we'd get errors for | |
1871 | address overlap with the text section. Let's set none of | |
1872 | those flags, as that is what currently happens for usual | |
1873 | GREG allocations, and that works. */ | |
1874 | if (allocated_gregs_section == NULL | |
930b4cb2 HPN |
1875 | || !bfd_set_section_alignment (bpo_greg_owner, |
1876 | allocated_gregs_section, | |
1877 | 3)) | |
b34976b6 | 1878 | return FALSE; |
930b4cb2 HPN |
1879 | |
1880 | gregdata = (struct bpo_greg_section_info *) | |
1881 | bfd_zalloc (bpo_greg_owner, sizeof (struct bpo_greg_section_info)); | |
1882 | if (gregdata == NULL) | |
b34976b6 | 1883 | return FALSE; |
f0abc2a1 AM |
1884 | mmix_elf_section_data (allocated_gregs_section)->bpo.greg |
1885 | = gregdata; | |
930b4cb2 HPN |
1886 | } |
1887 | else if (gregdata == NULL) | |
f0abc2a1 AM |
1888 | gregdata |
1889 | = mmix_elf_section_data (allocated_gregs_section)->bpo.greg; | |
930b4cb2 HPN |
1890 | |
1891 | /* Get ourselves some auxiliary info for the BPO-relocs. */ | |
1892 | if (bpodata == NULL) | |
1893 | { | |
1894 | /* No use doing a separate iteration pass to find the upper | |
1895 | limit - just use the number of relocs. */ | |
1896 | bpodata = (struct bpo_reloc_section_info *) | |
1897 | bfd_alloc (bpo_greg_owner, | |
1898 | sizeof (struct bpo_reloc_section_info) | |
1899 | * (sec->reloc_count + 1)); | |
1900 | if (bpodata == NULL) | |
b34976b6 | 1901 | return FALSE; |
f0abc2a1 | 1902 | mmix_elf_section_data (sec)->bpo.reloc = bpodata; |
930b4cb2 HPN |
1903 | bpodata->first_base_plus_offset_reloc |
1904 | = bpodata->bpo_index | |
1905 | = gregdata->n_max_bpo_relocs; | |
1906 | bpodata->bpo_greg_section | |
1907 | = allocated_gregs_section; | |
4fa5c2a8 | 1908 | bpodata->n_bpo_relocs_this_section = 0; |
930b4cb2 HPN |
1909 | } |
1910 | ||
1911 | bpodata->n_bpo_relocs_this_section++; | |
1912 | gregdata->n_max_bpo_relocs++; | |
1913 | ||
1914 | /* We don't get another chance to set this before GC; we've not | |
f60ebe14 | 1915 | set up any hook that runs before GC. */ |
930b4cb2 HPN |
1916 | gregdata->n_bpo_relocs |
1917 | = gregdata->n_max_bpo_relocs; | |
1918 | break; | |
f60ebe14 HPN |
1919 | |
1920 | case R_MMIX_PUSHJ_STUBBABLE: | |
1921 | mmix_elf_section_data (sec)->pjs.n_pushj_relocs++; | |
1922 | break; | |
930b4cb2 HPN |
1923 | } |
1924 | } | |
1925 | ||
f60ebe14 HPN |
1926 | /* Allocate per-reloc stub storage and initialize it to the max stub |
1927 | size. */ | |
1928 | if (mmix_elf_section_data (sec)->pjs.n_pushj_relocs != 0) | |
1929 | { | |
1930 | size_t i; | |
1931 | ||
1932 | mmix_elf_section_data (sec)->pjs.stub_size | |
1933 | = bfd_alloc (abfd, mmix_elf_section_data (sec)->pjs.n_pushj_relocs | |
1934 | * sizeof (mmix_elf_section_data (sec) | |
1935 | ->pjs.stub_size[0])); | |
1936 | if (mmix_elf_section_data (sec)->pjs.stub_size == NULL) | |
1937 | return FALSE; | |
1938 | ||
1939 | for (i = 0; i < mmix_elf_section_data (sec)->pjs.n_pushj_relocs; i++) | |
1940 | mmix_elf_section_data (sec)->pjs.stub_size[i] = MAX_PUSHJ_STUB_SIZE; | |
1941 | } | |
1942 | ||
b34976b6 | 1943 | return TRUE; |
930b4cb2 HPN |
1944 | } |
1945 | ||
3c3bdf30 NC |
1946 | /* Look through the relocs for a section during the first phase. */ |
1947 | ||
b34976b6 | 1948 | static bfd_boolean |
2c3fc389 NC |
1949 | mmix_elf_check_relocs (bfd *abfd, |
1950 | struct bfd_link_info *info, | |
1951 | asection *sec, | |
1952 | const Elf_Internal_Rela *relocs) | |
3c3bdf30 NC |
1953 | { |
1954 | Elf_Internal_Shdr *symtab_hdr; | |
5582a088 | 1955 | struct elf_link_hash_entry **sym_hashes; |
3c3bdf30 NC |
1956 | const Elf_Internal_Rela *rel; |
1957 | const Elf_Internal_Rela *rel_end; | |
1958 | ||
3c3bdf30 NC |
1959 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
1960 | sym_hashes = elf_sym_hashes (abfd); | |
3c3bdf30 NC |
1961 | |
1962 | /* First we sort the relocs so that any register relocs come before | |
1963 | expansion-relocs to the same insn. FIXME: Not done for mmo. */ | |
2c3fc389 | 1964 | qsort ((void *) relocs, sec->reloc_count, sizeof (Elf_Internal_Rela), |
3c3bdf30 NC |
1965 | mmix_elf_sort_relocs); |
1966 | ||
930b4cb2 HPN |
1967 | /* Do the common part. */ |
1968 | if (!mmix_elf_check_common_relocs (abfd, info, sec, relocs)) | |
b34976b6 | 1969 | return FALSE; |
930b4cb2 | 1970 | |
0e1862bb | 1971 | if (bfd_link_relocatable (info)) |
f60ebe14 HPN |
1972 | return TRUE; |
1973 | ||
3c3bdf30 NC |
1974 | rel_end = relocs + sec->reloc_count; |
1975 | for (rel = relocs; rel < rel_end; rel++) | |
1976 | { | |
1977 | struct elf_link_hash_entry *h; | |
1978 | unsigned long r_symndx; | |
1979 | ||
1980 | r_symndx = ELF64_R_SYM (rel->r_info); | |
1981 | if (r_symndx < symtab_hdr->sh_info) | |
1982 | h = NULL; | |
1983 | else | |
973a3492 L |
1984 | { |
1985 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1986 | while (h->root.type == bfd_link_hash_indirect | |
1987 | || h->root.type == bfd_link_hash_warning) | |
1988 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1989 | } | |
3c3bdf30 NC |
1990 | |
1991 | switch (ELF64_R_TYPE (rel->r_info)) | |
930b4cb2 | 1992 | { |
3c3bdf30 NC |
1993 | /* This relocation describes the C++ object vtable hierarchy. |
1994 | Reconstruct it for later use during GC. */ | |
1995 | case R_MMIX_GNU_VTINHERIT: | |
c152c796 | 1996 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
b34976b6 | 1997 | return FALSE; |
3c3bdf30 NC |
1998 | break; |
1999 | ||
2000 | /* This relocation describes which C++ vtable entries are actually | |
2001 | used. Record for later use during GC. */ | |
2002 | case R_MMIX_GNU_VTENTRY: | |
d17e0c6e JB |
2003 | BFD_ASSERT (h != NULL); |
2004 | if (h != NULL | |
2005 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
b34976b6 | 2006 | return FALSE; |
3c3bdf30 | 2007 | break; |
930b4cb2 HPN |
2008 | } |
2009 | } | |
2010 | ||
b34976b6 | 2011 | return TRUE; |
930b4cb2 HPN |
2012 | } |
2013 | ||
2014 | /* Wrapper for mmix_elf_check_common_relocs, called when linking to mmo. | |
2015 | Copied from elf_link_add_object_symbols. */ | |
2016 | ||
b34976b6 | 2017 | bfd_boolean |
2c3fc389 | 2018 | _bfd_mmix_check_all_relocs (bfd *abfd, struct bfd_link_info *info) |
930b4cb2 HPN |
2019 | { |
2020 | asection *o; | |
2021 | ||
2022 | for (o = abfd->sections; o != NULL; o = o->next) | |
2023 | { | |
2024 | Elf_Internal_Rela *internal_relocs; | |
b34976b6 | 2025 | bfd_boolean ok; |
930b4cb2 HPN |
2026 | |
2027 | if ((o->flags & SEC_RELOC) == 0 | |
2028 | || o->reloc_count == 0 | |
2029 | || ((info->strip == strip_all || info->strip == strip_debugger) | |
2030 | && (o->flags & SEC_DEBUGGING) != 0) | |
2031 | || bfd_is_abs_section (o->output_section)) | |
2032 | continue; | |
2033 | ||
2034 | internal_relocs | |
2c3fc389 | 2035 | = _bfd_elf_link_read_relocs (abfd, o, NULL, |
45d6a902 AM |
2036 | (Elf_Internal_Rela *) NULL, |
2037 | info->keep_memory); | |
930b4cb2 | 2038 | if (internal_relocs == NULL) |
b34976b6 | 2039 | return FALSE; |
930b4cb2 HPN |
2040 | |
2041 | ok = mmix_elf_check_common_relocs (abfd, info, o, internal_relocs); | |
2042 | ||
2043 | if (! info->keep_memory) | |
2044 | free (internal_relocs); | |
2045 | ||
2046 | if (! ok) | |
b34976b6 | 2047 | return FALSE; |
3c3bdf30 NC |
2048 | } |
2049 | ||
b34976b6 | 2050 | return TRUE; |
3c3bdf30 | 2051 | } |
e06fcc86 | 2052 | \f |
3c3bdf30 NC |
2053 | /* Change symbols relative to the reg contents section to instead be to |
2054 | the register section, and scale them down to correspond to the register | |
2055 | number. */ | |
2056 | ||
6e0b88f1 | 2057 | static int |
2c3fc389 NC |
2058 | mmix_elf_link_output_symbol_hook (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
2059 | const char *name ATTRIBUTE_UNUSED, | |
2060 | Elf_Internal_Sym *sym, | |
2061 | asection *input_sec, | |
2062 | struct elf_link_hash_entry *h ATTRIBUTE_UNUSED) | |
3c3bdf30 NC |
2063 | { |
2064 | if (input_sec != NULL | |
2065 | && input_sec->name != NULL | |
2066 | && ELF_ST_TYPE (sym->st_info) != STT_SECTION | |
2067 | && strcmp (input_sec->name, MMIX_REG_CONTENTS_SECTION_NAME) == 0) | |
2068 | { | |
2069 | sym->st_value /= 8; | |
2070 | sym->st_shndx = SHN_REGISTER; | |
2071 | } | |
2072 | ||
6e0b88f1 | 2073 | return 1; |
3c3bdf30 NC |
2074 | } |
2075 | ||
2076 | /* We fake a register section that holds values that are register numbers. | |
2077 | Having a SHN_REGISTER and register section translates better to other | |
2078 | formats (e.g. mmo) than for example a STT_REGISTER attribute. | |
2079 | This section faking is based on a construct in elf32-mips.c. */ | |
2080 | static asection mmix_elf_reg_section; | |
2081 | static asymbol mmix_elf_reg_section_symbol; | |
2082 | static asymbol *mmix_elf_reg_section_symbol_ptr; | |
2083 | ||
f60ebe14 | 2084 | /* Handle the special section numbers that a symbol may use. */ |
3c3bdf30 NC |
2085 | |
2086 | void | |
e6c7cdec | 2087 | mmix_elf_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, asymbol *asym) |
3c3bdf30 NC |
2088 | { |
2089 | elf_symbol_type *elfsym; | |
2090 | ||
2091 | elfsym = (elf_symbol_type *) asym; | |
2092 | switch (elfsym->internal_elf_sym.st_shndx) | |
2093 | { | |
2094 | case SHN_REGISTER: | |
2095 | if (mmix_elf_reg_section.name == NULL) | |
2096 | { | |
2097 | /* Initialize the register section. */ | |
2098 | mmix_elf_reg_section.name = MMIX_REG_SECTION_NAME; | |
2099 | mmix_elf_reg_section.flags = SEC_NO_FLAGS; | |
2100 | mmix_elf_reg_section.output_section = &mmix_elf_reg_section; | |
2101 | mmix_elf_reg_section.symbol = &mmix_elf_reg_section_symbol; | |
2102 | mmix_elf_reg_section.symbol_ptr_ptr = &mmix_elf_reg_section_symbol_ptr; | |
2103 | mmix_elf_reg_section_symbol.name = MMIX_REG_SECTION_NAME; | |
2104 | mmix_elf_reg_section_symbol.flags = BSF_SECTION_SYM; | |
2105 | mmix_elf_reg_section_symbol.section = &mmix_elf_reg_section; | |
2106 | mmix_elf_reg_section_symbol_ptr = &mmix_elf_reg_section_symbol; | |
2107 | } | |
2108 | asym->section = &mmix_elf_reg_section; | |
2109 | break; | |
2110 | ||
2111 | default: | |
2112 | break; | |
2113 | } | |
2114 | } | |
2115 | ||
2116 | /* Given a BFD section, try to locate the corresponding ELF section | |
2117 | index. */ | |
2118 | ||
b34976b6 | 2119 | static bfd_boolean |
2c3fc389 NC |
2120 | mmix_elf_section_from_bfd_section (bfd * abfd ATTRIBUTE_UNUSED, |
2121 | asection * sec, | |
2122 | int * retval) | |
3c3bdf30 NC |
2123 | { |
2124 | if (strcmp (bfd_get_section_name (abfd, sec), MMIX_REG_SECTION_NAME) == 0) | |
2125 | *retval = SHN_REGISTER; | |
2126 | else | |
b34976b6 | 2127 | return FALSE; |
3c3bdf30 | 2128 | |
b34976b6 | 2129 | return TRUE; |
3c3bdf30 NC |
2130 | } |
2131 | ||
2132 | /* Hook called by the linker routine which adds symbols from an object | |
2133 | file. We must handle the special SHN_REGISTER section number here. | |
2134 | ||
2135 | We also check that we only have *one* each of the section-start | |
2136 | symbols, since otherwise having two with the same value would cause | |
2137 | them to be "merged", but with the contents serialized. */ | |
2138 | ||
2c3fc389 NC |
2139 | static bfd_boolean |
2140 | mmix_elf_add_symbol_hook (bfd *abfd, | |
2141 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
2142 | Elf_Internal_Sym *sym, | |
2143 | const char **namep ATTRIBUTE_UNUSED, | |
2144 | flagword *flagsp ATTRIBUTE_UNUSED, | |
2145 | asection **secp, | |
2146 | bfd_vma *valp ATTRIBUTE_UNUSED) | |
3c3bdf30 NC |
2147 | { |
2148 | if (sym->st_shndx == SHN_REGISTER) | |
46fda84e AM |
2149 | { |
2150 | *secp = bfd_make_section_old_way (abfd, MMIX_REG_SECTION_NAME); | |
2151 | (*secp)->flags |= SEC_LINKER_CREATED; | |
2152 | } | |
3c3bdf30 | 2153 | else if ((*namep)[0] == '_' && (*namep)[1] == '_' && (*namep)[2] == '.' |
0112cd26 | 2154 | && CONST_STRNEQ (*namep, MMIX_LOC_SECTION_START_SYMBOL_PREFIX)) |
3c3bdf30 NC |
2155 | { |
2156 | /* See if we have another one. */ | |
4ab82700 AM |
2157 | struct bfd_link_hash_entry *h = bfd_link_hash_lookup (info->hash, |
2158 | *namep, | |
b34976b6 AM |
2159 | FALSE, |
2160 | FALSE, | |
2161 | FALSE); | |
3c3bdf30 | 2162 | |
4ab82700 | 2163 | if (h != NULL && h->type != bfd_link_hash_undefined) |
3c3bdf30 NC |
2164 | { |
2165 | /* How do we get the asymbol (or really: the filename) from h? | |
4ab82700 | 2166 | h->u.def.section->owner is NULL. */ |
4eca0228 | 2167 | _bfd_error_handler |
695344c0 | 2168 | /* xgettext:c-format */ |
dae82561 | 2169 | (_("%B: Error: multiple definition of `%s'; start of %s " |
4eca0228 | 2170 | "is set in a earlier linked file\n"), |
dae82561 | 2171 | abfd, *namep, |
4eca0228 | 2172 | *namep + strlen (MMIX_LOC_SECTION_START_SYMBOL_PREFIX)); |
3c3bdf30 | 2173 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 2174 | return FALSE; |
3c3bdf30 NC |
2175 | } |
2176 | } | |
2177 | ||
b34976b6 | 2178 | return TRUE; |
3c3bdf30 NC |
2179 | } |
2180 | ||
2181 | /* We consider symbols matching "L.*:[0-9]+" to be local symbols. */ | |
2182 | ||
2c3fc389 NC |
2183 | static bfd_boolean |
2184 | mmix_elf_is_local_label_name (bfd *abfd, const char *name) | |
3c3bdf30 NC |
2185 | { |
2186 | const char *colpos; | |
2187 | int digits; | |
2188 | ||
2189 | /* Also include the default local-label definition. */ | |
2190 | if (_bfd_elf_is_local_label_name (abfd, name)) | |
b34976b6 | 2191 | return TRUE; |
3c3bdf30 NC |
2192 | |
2193 | if (*name != 'L') | |
b34976b6 | 2194 | return FALSE; |
3c3bdf30 NC |
2195 | |
2196 | /* If there's no ":", or more than one, it's not a local symbol. */ | |
2197 | colpos = strchr (name, ':'); | |
2198 | if (colpos == NULL || strchr (colpos + 1, ':') != NULL) | |
b34976b6 | 2199 | return FALSE; |
3c3bdf30 NC |
2200 | |
2201 | /* Check that there are remaining characters and that they are digits. */ | |
2202 | if (colpos[1] == 0) | |
b34976b6 | 2203 | return FALSE; |
3c3bdf30 NC |
2204 | |
2205 | digits = strspn (colpos + 1, "0123456789"); | |
2206 | return digits != 0 && colpos[1 + digits] == 0; | |
2207 | } | |
2208 | ||
2209 | /* We get rid of the register section here. */ | |
2210 | ||
b34976b6 | 2211 | bfd_boolean |
2c3fc389 | 2212 | mmix_elf_final_link (bfd *abfd, struct bfd_link_info *info) |
3c3bdf30 NC |
2213 | { |
2214 | /* We never output a register section, though we create one for | |
2215 | temporary measures. Check that nobody entered contents into it. */ | |
2216 | asection *reg_section; | |
3c3bdf30 NC |
2217 | |
2218 | reg_section = bfd_get_section_by_name (abfd, MMIX_REG_SECTION_NAME); | |
2219 | ||
2220 | if (reg_section != NULL) | |
2221 | { | |
2222 | /* FIXME: Pass error state gracefully. */ | |
2223 | if (bfd_get_section_flags (abfd, reg_section) & SEC_HAS_CONTENTS) | |
2224 | _bfd_abort (__FILE__, __LINE__, _("Register section has contents\n")); | |
2225 | ||
46fda84e AM |
2226 | /* Really remove the section, if it hasn't already been done. */ |
2227 | if (!bfd_section_removed_from_list (abfd, reg_section)) | |
2228 | { | |
2229 | bfd_section_list_remove (abfd, reg_section); | |
2230 | --abfd->section_count; | |
2231 | } | |
3c3bdf30 NC |
2232 | } |
2233 | ||
c152c796 | 2234 | if (! bfd_elf_final_link (abfd, info)) |
b34976b6 | 2235 | return FALSE; |
3c3bdf30 | 2236 | |
930b4cb2 HPN |
2237 | /* Since this section is marked SEC_LINKER_CREATED, it isn't output by |
2238 | the regular linker machinery. We do it here, like other targets with | |
2239 | special sections. */ | |
2240 | if (info->base_file != NULL) | |
2241 | { | |
2242 | asection *greg_section | |
2243 | = bfd_get_section_by_name ((bfd *) info->base_file, | |
2244 | MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME); | |
2245 | if (!bfd_set_section_contents (abfd, | |
2246 | greg_section->output_section, | |
2247 | greg_section->contents, | |
2248 | (file_ptr) greg_section->output_offset, | |
eea6121a | 2249 | greg_section->size)) |
b34976b6 | 2250 | return FALSE; |
930b4cb2 | 2251 | } |
b34976b6 | 2252 | return TRUE; |
930b4cb2 HPN |
2253 | } |
2254 | ||
f60ebe14 | 2255 | /* We need to include the maximum size of PUSHJ-stubs in the initial |
eea6121a | 2256 | section size. This is expected to shrink during linker relaxation. */ |
f60ebe14 HPN |
2257 | |
2258 | static void | |
2c3fc389 NC |
2259 | mmix_set_relaxable_size (bfd *abfd ATTRIBUTE_UNUSED, |
2260 | asection *sec, | |
2261 | void *ptr) | |
f60ebe14 HPN |
2262 | { |
2263 | struct bfd_link_info *info = ptr; | |
2264 | ||
2265 | /* Make sure we only do this for section where we know we want this, | |
2266 | otherwise we might end up resetting the size of COMMONs. */ | |
2267 | if (mmix_elf_section_data (sec)->pjs.n_pushj_relocs == 0) | |
2268 | return; | |
2269 | ||
1a23a9e6 | 2270 | sec->rawsize = sec->size; |
eea6121a AM |
2271 | sec->size += (mmix_elf_section_data (sec)->pjs.n_pushj_relocs |
2272 | * MAX_PUSHJ_STUB_SIZE); | |
f60ebe14 HPN |
2273 | |
2274 | /* For use in relocatable link, we start with a max stubs size. See | |
2275 | mmix_elf_relax_section. */ | |
0e1862bb | 2276 | if (bfd_link_relocatable (info) && sec->output_section) |
f60ebe14 HPN |
2277 | mmix_elf_section_data (sec->output_section)->pjs.stubs_size_sum |
2278 | += (mmix_elf_section_data (sec)->pjs.n_pushj_relocs | |
2279 | * MAX_PUSHJ_STUB_SIZE); | |
2280 | } | |
2281 | ||
930b4cb2 HPN |
2282 | /* Initialize stuff for the linker-generated GREGs to match |
2283 | R_MMIX_BASE_PLUS_OFFSET relocs seen by the linker. */ | |
2284 | ||
b34976b6 | 2285 | bfd_boolean |
2c3fc389 NC |
2286 | _bfd_mmix_before_linker_allocation (bfd *abfd ATTRIBUTE_UNUSED, |
2287 | struct bfd_link_info *info) | |
930b4cb2 HPN |
2288 | { |
2289 | asection *bpo_gregs_section; | |
2290 | bfd *bpo_greg_owner; | |
2291 | struct bpo_greg_section_info *gregdata; | |
2292 | size_t n_gregs; | |
2293 | bfd_vma gregs_size; | |
2294 | size_t i; | |
2295 | size_t *bpo_reloc_indexes; | |
f60ebe14 HPN |
2296 | bfd *ibfd; |
2297 | ||
2298 | /* Set the initial size of sections. */ | |
c72f2fb2 | 2299 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
f60ebe14 | 2300 | bfd_map_over_sections (ibfd, mmix_set_relaxable_size, info); |
930b4cb2 HPN |
2301 | |
2302 | /* The bpo_greg_owner bfd is supposed to have been set by | |
2303 | mmix_elf_check_relocs when the first R_MMIX_BASE_PLUS_OFFSET is seen. | |
2304 | If there is no such object, there was no R_MMIX_BASE_PLUS_OFFSET. */ | |
2305 | bpo_greg_owner = (bfd *) info->base_file; | |
2306 | if (bpo_greg_owner == NULL) | |
b34976b6 | 2307 | return TRUE; |
930b4cb2 HPN |
2308 | |
2309 | bpo_gregs_section | |
2310 | = bfd_get_section_by_name (bpo_greg_owner, | |
2311 | MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME); | |
2312 | ||
930b4cb2 | 2313 | if (bpo_gregs_section == NULL) |
b34976b6 | 2314 | return TRUE; |
930b4cb2 HPN |
2315 | |
2316 | /* We use the target-data handle in the ELF section data. */ | |
f0abc2a1 | 2317 | gregdata = mmix_elf_section_data (bpo_gregs_section)->bpo.greg; |
930b4cb2 | 2318 | if (gregdata == NULL) |
b34976b6 | 2319 | return FALSE; |
930b4cb2 HPN |
2320 | |
2321 | n_gregs = gregdata->n_bpo_relocs; | |
2322 | gregdata->n_allocated_bpo_gregs = n_gregs; | |
2323 | ||
2324 | /* When this reaches zero during relaxation, all entries have been | |
2325 | filled in and the size of the linker gregs can be calculated. */ | |
2326 | gregdata->n_remaining_bpo_relocs_this_relaxation_round = n_gregs; | |
2327 | ||
2328 | /* Set the zeroth-order estimate for the GREGs size. */ | |
2329 | gregs_size = n_gregs * 8; | |
2330 | ||
2331 | if (!bfd_set_section_size (bpo_greg_owner, bpo_gregs_section, gregs_size)) | |
b34976b6 | 2332 | return FALSE; |
930b4cb2 HPN |
2333 | |
2334 | /* Allocate and set up the GREG arrays. They're filled in at relaxation | |
2335 | time. Note that we must use the max number ever noted for the array, | |
2336 | since the index numbers were created before GC. */ | |
2337 | gregdata->reloc_request | |
2338 | = bfd_zalloc (bpo_greg_owner, | |
2339 | sizeof (struct bpo_reloc_request) | |
2340 | * gregdata->n_max_bpo_relocs); | |
2341 | ||
2342 | gregdata->bpo_reloc_indexes | |
2343 | = bpo_reloc_indexes | |
2344 | = bfd_alloc (bpo_greg_owner, | |
2345 | gregdata->n_max_bpo_relocs | |
2346 | * sizeof (size_t)); | |
2347 | if (bpo_reloc_indexes == NULL) | |
b34976b6 | 2348 | return FALSE; |
930b4cb2 HPN |
2349 | |
2350 | /* The default order is an identity mapping. */ | |
2351 | for (i = 0; i < gregdata->n_max_bpo_relocs; i++) | |
2352 | { | |
2353 | bpo_reloc_indexes[i] = i; | |
2354 | gregdata->reloc_request[i].bpo_reloc_no = i; | |
2355 | } | |
2356 | ||
b34976b6 | 2357 | return TRUE; |
3c3bdf30 | 2358 | } |
e06fcc86 | 2359 | \f |
930b4cb2 HPN |
2360 | /* Fill in contents in the linker allocated gregs. Everything is |
2361 | calculated at this point; we just move the contents into place here. */ | |
2362 | ||
b34976b6 | 2363 | bfd_boolean |
2c3fc389 NC |
2364 | _bfd_mmix_after_linker_allocation (bfd *abfd ATTRIBUTE_UNUSED, |
2365 | struct bfd_link_info *link_info) | |
930b4cb2 HPN |
2366 | { |
2367 | asection *bpo_gregs_section; | |
2368 | bfd *bpo_greg_owner; | |
2369 | struct bpo_greg_section_info *gregdata; | |
2370 | size_t n_gregs; | |
2371 | size_t i, j; | |
2372 | size_t lastreg; | |
2373 | bfd_byte *contents; | |
2374 | ||
2375 | /* The bpo_greg_owner bfd is supposed to have been set by mmix_elf_check_relocs | |
2376 | when the first R_MMIX_BASE_PLUS_OFFSET is seen. If there is no such | |
2377 | object, there was no R_MMIX_BASE_PLUS_OFFSET. */ | |
2378 | bpo_greg_owner = (bfd *) link_info->base_file; | |
2379 | if (bpo_greg_owner == NULL) | |
b34976b6 | 2380 | return TRUE; |
930b4cb2 HPN |
2381 | |
2382 | bpo_gregs_section | |
2383 | = bfd_get_section_by_name (bpo_greg_owner, | |
2384 | MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME); | |
2385 | ||
2386 | /* This can't happen without DSO handling. When DSOs are handled | |
2387 | without any R_MMIX_BASE_PLUS_OFFSET seen, there will be no such | |
2388 | section. */ | |
2389 | if (bpo_gregs_section == NULL) | |
b34976b6 | 2390 | return TRUE; |
930b4cb2 HPN |
2391 | |
2392 | /* We use the target-data handle in the ELF section data. */ | |
2393 | ||
f0abc2a1 | 2394 | gregdata = mmix_elf_section_data (bpo_gregs_section)->bpo.greg; |
930b4cb2 | 2395 | if (gregdata == NULL) |
b34976b6 | 2396 | return FALSE; |
930b4cb2 HPN |
2397 | |
2398 | n_gregs = gregdata->n_allocated_bpo_gregs; | |
2399 | ||
2400 | bpo_gregs_section->contents | |
eea6121a | 2401 | = contents = bfd_alloc (bpo_greg_owner, bpo_gregs_section->size); |
930b4cb2 | 2402 | if (contents == NULL) |
b34976b6 | 2403 | return FALSE; |
930b4cb2 | 2404 | |
7e799044 HPN |
2405 | /* Sanity check: If these numbers mismatch, some relocation has not been |
2406 | accounted for and the rest of gregdata is probably inconsistent. | |
2407 | It's a bug, but it's more helpful to identify it than segfaulting | |
2408 | below. */ | |
2409 | if (gregdata->n_remaining_bpo_relocs_this_relaxation_round | |
2410 | != gregdata->n_bpo_relocs) | |
2411 | { | |
4eca0228 | 2412 | _bfd_error_handler |
695344c0 | 2413 | /* xgettext:c-format */ |
d42c267e | 2414 | (_("Internal inconsistency: remaining %lu != max %lu.\n\ |
7e799044 | 2415 | Please report this bug."), |
d42c267e AM |
2416 | (unsigned long) gregdata->n_remaining_bpo_relocs_this_relaxation_round, |
2417 | (unsigned long) gregdata->n_bpo_relocs); | |
b34976b6 | 2418 | return FALSE; |
7e799044 HPN |
2419 | } |
2420 | ||
930b4cb2 HPN |
2421 | for (lastreg = 255, i = 0, j = 0; j < n_gregs; i++) |
2422 | if (gregdata->reloc_request[i].regindex != lastreg) | |
2423 | { | |
2424 | bfd_put_64 (bpo_greg_owner, gregdata->reloc_request[i].value, | |
2425 | contents + j * 8); | |
2426 | lastreg = gregdata->reloc_request[i].regindex; | |
2427 | j++; | |
2428 | } | |
2429 | ||
b34976b6 | 2430 | return TRUE; |
930b4cb2 HPN |
2431 | } |
2432 | ||
2433 | /* Sort valid relocs to come before non-valid relocs, then on increasing | |
2434 | value. */ | |
2435 | ||
2436 | static int | |
2c3fc389 | 2437 | bpo_reloc_request_sort_fn (const void * p1, const void * p2) |
930b4cb2 HPN |
2438 | { |
2439 | const struct bpo_reloc_request *r1 = (const struct bpo_reloc_request *) p1; | |
2440 | const struct bpo_reloc_request *r2 = (const struct bpo_reloc_request *) p2; | |
2441 | ||
2442 | /* Primary function is validity; non-valid relocs sorted after valid | |
2443 | ones. */ | |
2444 | if (r1->valid != r2->valid) | |
2445 | return r2->valid - r1->valid; | |
2446 | ||
4fa5c2a8 HPN |
2447 | /* Then sort on value. Don't simplify and return just the difference of |
2448 | the values: the upper bits of the 64-bit value would be truncated on | |
2449 | a host with 32-bit ints. */ | |
930b4cb2 | 2450 | if (r1->value != r2->value) |
4fa5c2a8 | 2451 | return r1->value > r2->value ? 1 : -1; |
930b4cb2 | 2452 | |
dfbbae4c HPN |
2453 | /* As a last re-sort, use the relocation number, so we get a stable |
2454 | sort. The *addresses* aren't stable since items are swapped during | |
2455 | sorting. It depends on the qsort implementation if this actually | |
2456 | happens. */ | |
2457 | return r1->bpo_reloc_no > r2->bpo_reloc_no | |
2458 | ? 1 : (r1->bpo_reloc_no < r2->bpo_reloc_no ? -1 : 0); | |
930b4cb2 HPN |
2459 | } |
2460 | ||
4fa5c2a8 HPN |
2461 | /* For debug use only. Dumps the global register allocations resulting |
2462 | from base-plus-offset relocs. */ | |
2463 | ||
2464 | void | |
e6c7cdec | 2465 | mmix_dump_bpo_gregs (struct bfd_link_info *link_info, |
52d45da3 | 2466 | void (*pf) (const char *fmt, ...)) |
4fa5c2a8 HPN |
2467 | { |
2468 | bfd *bpo_greg_owner; | |
2469 | asection *bpo_gregs_section; | |
2470 | struct bpo_greg_section_info *gregdata; | |
2471 | unsigned int i; | |
2472 | ||
2473 | if (link_info == NULL || link_info->base_file == NULL) | |
2474 | return; | |
2475 | ||
2476 | bpo_greg_owner = (bfd *) link_info->base_file; | |
2477 | ||
2478 | bpo_gregs_section | |
2479 | = bfd_get_section_by_name (bpo_greg_owner, | |
2480 | MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME); | |
2481 | ||
2482 | if (bpo_gregs_section == NULL) | |
2483 | return; | |
2484 | ||
f0abc2a1 | 2485 | gregdata = mmix_elf_section_data (bpo_gregs_section)->bpo.greg; |
4fa5c2a8 HPN |
2486 | if (gregdata == NULL) |
2487 | return; | |
2488 | ||
2489 | if (pf == NULL) | |
2490 | pf = _bfd_error_handler; | |
2491 | ||
2492 | /* These format strings are not translated. They are for debug purposes | |
2493 | only and never displayed to an end user. Should they escape, we | |
2494 | surely want them in original. */ | |
2495 | (*pf) (" n_bpo_relocs: %u\n n_max_bpo_relocs: %u\n n_remain...round: %u\n\ | |
2496 | n_allocated_bpo_gregs: %u\n", gregdata->n_bpo_relocs, | |
2497 | gregdata->n_max_bpo_relocs, | |
2498 | gregdata->n_remaining_bpo_relocs_this_relaxation_round, | |
2499 | gregdata->n_allocated_bpo_gregs); | |
2500 | ||
2501 | if (gregdata->reloc_request) | |
2502 | for (i = 0; i < gregdata->n_max_bpo_relocs; i++) | |
2503 | (*pf) ("%4u (%4u)/%4u#%u: 0x%08lx%08lx r: %3u o: %3u\n", | |
2504 | i, | |
cf3d882d AM |
2505 | (gregdata->bpo_reloc_indexes != NULL |
2506 | ? gregdata->bpo_reloc_indexes[i] : (size_t) -1), | |
4fa5c2a8 HPN |
2507 | gregdata->reloc_request[i].bpo_reloc_no, |
2508 | gregdata->reloc_request[i].valid, | |
2509 | ||
2510 | (unsigned long) (gregdata->reloc_request[i].value >> 32), | |
2511 | (unsigned long) gregdata->reloc_request[i].value, | |
2512 | gregdata->reloc_request[i].regindex, | |
2513 | gregdata->reloc_request[i].offset); | |
2514 | } | |
2515 | ||
930b4cb2 HPN |
2516 | /* This links all R_MMIX_BASE_PLUS_OFFSET relocs into a special array, and |
2517 | when the last such reloc is done, an index-array is sorted according to | |
2518 | the values and iterated over to produce register numbers (indexed by 0 | |
2519 | from the first allocated register number) and offsets for use in real | |
80f540b7 | 2520 | relocation. (N.B.: Relocatable runs are handled, not just punted.) |
930b4cb2 | 2521 | |
f60ebe14 HPN |
2522 | PUSHJ stub accounting is also done here. |
2523 | ||
930b4cb2 HPN |
2524 | Symbol- and reloc-reading infrastructure copied from elf-m10200.c. */ |
2525 | ||
b34976b6 | 2526 | static bfd_boolean |
2c3fc389 NC |
2527 | mmix_elf_relax_section (bfd *abfd, |
2528 | asection *sec, | |
2529 | struct bfd_link_info *link_info, | |
2530 | bfd_boolean *again) | |
930b4cb2 | 2531 | { |
930b4cb2 | 2532 | Elf_Internal_Shdr *symtab_hdr; |
930b4cb2 | 2533 | Elf_Internal_Rela *internal_relocs; |
930b4cb2 HPN |
2534 | Elf_Internal_Rela *irel, *irelend; |
2535 | asection *bpo_gregs_section = NULL; | |
2536 | struct bpo_greg_section_info *gregdata; | |
2537 | struct bpo_reloc_section_info *bpodata | |
f0abc2a1 | 2538 | = mmix_elf_section_data (sec)->bpo.reloc; |
f60ebe14 HPN |
2539 | /* The initialization is to quiet compiler warnings. The value is to |
2540 | spot a missing actual initialization. */ | |
2541 | size_t bpono = (size_t) -1; | |
2542 | size_t pjsno = 0; | |
6cdc0ccc | 2543 | Elf_Internal_Sym *isymbuf = NULL; |
1a23a9e6 | 2544 | bfd_size_type size = sec->rawsize ? sec->rawsize : sec->size; |
f60ebe14 HPN |
2545 | |
2546 | mmix_elf_section_data (sec)->pjs.stubs_size_sum = 0; | |
930b4cb2 HPN |
2547 | |
2548 | /* Assume nothing changes. */ | |
b34976b6 | 2549 | *again = FALSE; |
930b4cb2 | 2550 | |
f60ebe14 HPN |
2551 | /* We don't have to do anything if this section does not have relocs, or |
2552 | if this is not a code section. */ | |
2553 | if ((sec->flags & SEC_RELOC) == 0 | |
930b4cb2 HPN |
2554 | || sec->reloc_count == 0 |
2555 | || (sec->flags & SEC_CODE) == 0 | |
2556 | || (sec->flags & SEC_LINKER_CREATED) != 0 | |
f60ebe14 HPN |
2557 | /* If no R_MMIX_BASE_PLUS_OFFSET relocs and no PUSHJ-stub relocs, |
2558 | then nothing to do. */ | |
2559 | || (bpodata == NULL | |
2560 | && mmix_elf_section_data (sec)->pjs.n_pushj_relocs == 0)) | |
b34976b6 | 2561 | return TRUE; |
930b4cb2 HPN |
2562 | |
2563 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
930b4cb2 | 2564 | |
f60ebe14 HPN |
2565 | if (bpodata != NULL) |
2566 | { | |
2567 | bpo_gregs_section = bpodata->bpo_greg_section; | |
2568 | gregdata = mmix_elf_section_data (bpo_gregs_section)->bpo.greg; | |
2569 | bpono = bpodata->first_base_plus_offset_reloc; | |
2570 | } | |
2571 | else | |
2572 | gregdata = NULL; | |
930b4cb2 HPN |
2573 | |
2574 | /* Get a copy of the native relocations. */ | |
2575 | internal_relocs | |
2c3fc389 | 2576 | = _bfd_elf_link_read_relocs (abfd, sec, NULL, |
45d6a902 AM |
2577 | (Elf_Internal_Rela *) NULL, |
2578 | link_info->keep_memory); | |
930b4cb2 HPN |
2579 | if (internal_relocs == NULL) |
2580 | goto error_return; | |
930b4cb2 HPN |
2581 | |
2582 | /* Walk through them looking for relaxing opportunities. */ | |
2583 | irelend = internal_relocs + sec->reloc_count; | |
2584 | for (irel = internal_relocs; irel < irelend; irel++) | |
2585 | { | |
2586 | bfd_vma symval; | |
f60ebe14 | 2587 | struct elf_link_hash_entry *h = NULL; |
930b4cb2 | 2588 | |
f60ebe14 HPN |
2589 | /* We only process two relocs. */ |
2590 | if (ELF64_R_TYPE (irel->r_info) != (int) R_MMIX_BASE_PLUS_OFFSET | |
2591 | && ELF64_R_TYPE (irel->r_info) != (int) R_MMIX_PUSHJ_STUBBABLE) | |
930b4cb2 HPN |
2592 | continue; |
2593 | ||
f60ebe14 HPN |
2594 | /* We process relocs in a distinctly different way when this is a |
2595 | relocatable link (for one, we don't look at symbols), so we avoid | |
2596 | mixing its code with that for the "normal" relaxation. */ | |
0e1862bb | 2597 | if (bfd_link_relocatable (link_info)) |
f60ebe14 HPN |
2598 | { |
2599 | /* The only transformation in a relocatable link is to generate | |
2600 | a full stub at the location of the stub calculated for the | |
2601 | input section, if the relocated stub location, the end of the | |
2602 | output section plus earlier stubs, cannot be reached. Thus | |
2603 | relocatable linking can only lead to worse code, but it still | |
2604 | works. */ | |
2605 | if (ELF64_R_TYPE (irel->r_info) == R_MMIX_PUSHJ_STUBBABLE) | |
2606 | { | |
2607 | /* If we can reach the end of the output-section and beyond | |
2608 | any current stubs, then we don't need a stub for this | |
2609 | reloc. The relaxed order of output stub allocation may | |
2610 | not exactly match the straightforward order, so we always | |
2611 | assume presence of output stubs, which will allow | |
2612 | relaxation only on relocations indifferent to the | |
2613 | presence of output stub allocations for other relocations | |
2614 | and thus the order of output stub allocation. */ | |
2615 | if (bfd_check_overflow (complain_overflow_signed, | |
2616 | 19, | |
2617 | 0, | |
2618 | bfd_arch_bits_per_address (abfd), | |
2619 | /* Output-stub location. */ | |
1a23a9e6 | 2620 | sec->output_section->rawsize |
f60ebe14 HPN |
2621 | + (mmix_elf_section_data (sec |
2622 | ->output_section) | |
2623 | ->pjs.stubs_size_sum) | |
2624 | /* Location of this PUSHJ reloc. */ | |
2625 | - (sec->output_offset + irel->r_offset) | |
2626 | /* Don't count *this* stub twice. */ | |
2627 | - (mmix_elf_section_data (sec) | |
2628 | ->pjs.stub_size[pjsno] | |
2629 | + MAX_PUSHJ_STUB_SIZE)) | |
2630 | == bfd_reloc_ok) | |
2631 | mmix_elf_section_data (sec)->pjs.stub_size[pjsno] = 0; | |
2632 | ||
2633 | mmix_elf_section_data (sec)->pjs.stubs_size_sum | |
2634 | += mmix_elf_section_data (sec)->pjs.stub_size[pjsno]; | |
2635 | ||
2636 | pjsno++; | |
2637 | } | |
2638 | ||
2639 | continue; | |
2640 | } | |
2641 | ||
930b4cb2 HPN |
2642 | /* Get the value of the symbol referred to by the reloc. */ |
2643 | if (ELF64_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
2644 | { | |
2645 | /* A local symbol. */ | |
6cdc0ccc | 2646 | Elf_Internal_Sym *isym; |
930b4cb2 HPN |
2647 | asection *sym_sec; |
2648 | ||
6cdc0ccc AM |
2649 | /* Read this BFD's local symbols if we haven't already. */ |
2650 | if (isymbuf == NULL) | |
2651 | { | |
2652 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
2653 | if (isymbuf == NULL) | |
2654 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
2655 | symtab_hdr->sh_info, 0, | |
2656 | NULL, NULL, NULL); | |
2657 | if (isymbuf == 0) | |
2658 | goto error_return; | |
2659 | } | |
930b4cb2 | 2660 | |
6cdc0ccc AM |
2661 | isym = isymbuf + ELF64_R_SYM (irel->r_info); |
2662 | if (isym->st_shndx == SHN_UNDEF) | |
930b4cb2 | 2663 | sym_sec = bfd_und_section_ptr; |
6cdc0ccc | 2664 | else if (isym->st_shndx == SHN_ABS) |
930b4cb2 | 2665 | sym_sec = bfd_abs_section_ptr; |
6cdc0ccc | 2666 | else if (isym->st_shndx == SHN_COMMON) |
930b4cb2 HPN |
2667 | sym_sec = bfd_com_section_ptr; |
2668 | else | |
6cdc0ccc AM |
2669 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
2670 | symval = (isym->st_value | |
930b4cb2 HPN |
2671 | + sym_sec->output_section->vma |
2672 | + sym_sec->output_offset); | |
2673 | } | |
2674 | else | |
2675 | { | |
2676 | unsigned long indx; | |
930b4cb2 HPN |
2677 | |
2678 | /* An external symbol. */ | |
2679 | indx = ELF64_R_SYM (irel->r_info) - symtab_hdr->sh_info; | |
2680 | h = elf_sym_hashes (abfd)[indx]; | |
2681 | BFD_ASSERT (h != NULL); | |
284d826d HPN |
2682 | if (h->root.type == bfd_link_hash_undefweak) |
2683 | /* FIXME: for R_MMIX_PUSHJ_STUBBABLE, there are alternatives to | |
2684 | the canonical value 0 for an unresolved weak symbol to | |
2685 | consider: as the debug-friendly approach, resolve to "abort" | |
2686 | (or a port-specific function), or as the space-friendly | |
2687 | approach resolve to the next instruction (like some other | |
2688 | ports, notably ARM and AArch64). These alternatives require | |
2689 | matching code in mmix_elf_perform_relocation or its caller. */ | |
2690 | symval = 0; | |
2691 | else if (h->root.type == bfd_link_hash_defined | |
2692 | || h->root.type == bfd_link_hash_defweak) | |
2693 | symval = (h->root.u.def.value | |
2694 | + h->root.u.def.section->output_section->vma | |
2695 | + h->root.u.def.section->output_offset); | |
2696 | else | |
930b4cb2 | 2697 | { |
f60ebe14 HPN |
2698 | /* This appears to be a reference to an undefined symbol. Just |
2699 | ignore it--it will be caught by the regular reloc processing. | |
2700 | We need to keep BPO reloc accounting consistent, though | |
2701 | else we'll abort instead of emitting an error message. */ | |
2702 | if (ELF64_R_TYPE (irel->r_info) == R_MMIX_BASE_PLUS_OFFSET | |
2703 | && gregdata != NULL) | |
2704 | { | |
2705 | gregdata->n_remaining_bpo_relocs_this_relaxation_round--; | |
2706 | bpono++; | |
2707 | } | |
930b4cb2 HPN |
2708 | continue; |
2709 | } | |
930b4cb2 HPN |
2710 | } |
2711 | ||
f60ebe14 HPN |
2712 | if (ELF64_R_TYPE (irel->r_info) == (int) R_MMIX_PUSHJ_STUBBABLE) |
2713 | { | |
2714 | bfd_vma value = symval + irel->r_addend; | |
2715 | bfd_vma dot | |
2716 | = (sec->output_section->vma | |
2717 | + sec->output_offset | |
2718 | + irel->r_offset); | |
2719 | bfd_vma stubaddr | |
2720 | = (sec->output_section->vma | |
2721 | + sec->output_offset | |
eea6121a | 2722 | + size |
f60ebe14 HPN |
2723 | + mmix_elf_section_data (sec)->pjs.stubs_size_sum); |
2724 | ||
2725 | if ((value & 3) == 0 | |
2726 | && bfd_check_overflow (complain_overflow_signed, | |
2727 | 19, | |
2728 | 0, | |
2729 | bfd_arch_bits_per_address (abfd), | |
2730 | value - dot | |
2731 | - (value > dot | |
2732 | ? mmix_elf_section_data (sec) | |
2733 | ->pjs.stub_size[pjsno] | |
2734 | : 0)) | |
2735 | == bfd_reloc_ok) | |
2736 | /* If the reloc fits, no stub is needed. */ | |
2737 | mmix_elf_section_data (sec)->pjs.stub_size[pjsno] = 0; | |
2738 | else | |
2739 | /* Maybe we can get away with just a JMP insn? */ | |
2740 | if ((value & 3) == 0 | |
2741 | && bfd_check_overflow (complain_overflow_signed, | |
2742 | 27, | |
2743 | 0, | |
2744 | bfd_arch_bits_per_address (abfd), | |
2745 | value - stubaddr | |
2746 | - (value > dot | |
2747 | ? mmix_elf_section_data (sec) | |
2748 | ->pjs.stub_size[pjsno] - 4 | |
2749 | : 0)) | |
2750 | == bfd_reloc_ok) | |
2751 | /* Yep, account for a stub consisting of a single JMP insn. */ | |
2752 | mmix_elf_section_data (sec)->pjs.stub_size[pjsno] = 4; | |
2753 | else | |
2754 | /* Nope, go for the full insn stub. It doesn't seem useful to | |
2755 | emit the intermediate sizes; those will only be useful for | |
2756 | a >64M program assuming contiguous code. */ | |
2757 | mmix_elf_section_data (sec)->pjs.stub_size[pjsno] | |
2758 | = MAX_PUSHJ_STUB_SIZE; | |
2759 | ||
2760 | mmix_elf_section_data (sec)->pjs.stubs_size_sum | |
2761 | += mmix_elf_section_data (sec)->pjs.stub_size[pjsno]; | |
2762 | pjsno++; | |
2763 | continue; | |
2764 | } | |
2765 | ||
2766 | /* We're looking at a R_MMIX_BASE_PLUS_OFFSET reloc. */ | |
2767 | ||
930b4cb2 HPN |
2768 | gregdata->reloc_request[gregdata->bpo_reloc_indexes[bpono]].value |
2769 | = symval + irel->r_addend; | |
b34976b6 | 2770 | gregdata->reloc_request[gregdata->bpo_reloc_indexes[bpono++]].valid = TRUE; |
930b4cb2 HPN |
2771 | gregdata->n_remaining_bpo_relocs_this_relaxation_round--; |
2772 | } | |
2773 | ||
2774 | /* Check if that was the last BPO-reloc. If so, sort the values and | |
2775 | calculate how many registers we need to cover them. Set the size of | |
2776 | the linker gregs, and if the number of registers changed, indicate | |
2777 | that we need to relax some more because we have more work to do. */ | |
f60ebe14 HPN |
2778 | if (gregdata != NULL |
2779 | && gregdata->n_remaining_bpo_relocs_this_relaxation_round == 0) | |
930b4cb2 HPN |
2780 | { |
2781 | size_t i; | |
2782 | bfd_vma prev_base; | |
2783 | size_t regindex; | |
2784 | ||
2785 | /* First, reset the remaining relocs for the next round. */ | |
2786 | gregdata->n_remaining_bpo_relocs_this_relaxation_round | |
2787 | = gregdata->n_bpo_relocs; | |
2788 | ||
2c3fc389 | 2789 | qsort (gregdata->reloc_request, |
930b4cb2 HPN |
2790 | gregdata->n_max_bpo_relocs, |
2791 | sizeof (struct bpo_reloc_request), | |
2792 | bpo_reloc_request_sort_fn); | |
2793 | ||
2794 | /* Recalculate indexes. When we find a change (however unlikely | |
2795 | after the initial iteration), we know we need to relax again, | |
2796 | since items in the GREG-array are sorted by increasing value and | |
2797 | stored in the relaxation phase. */ | |
2798 | for (i = 0; i < gregdata->n_max_bpo_relocs; i++) | |
2799 | if (gregdata->bpo_reloc_indexes[gregdata->reloc_request[i].bpo_reloc_no] | |
2800 | != i) | |
2801 | { | |
2802 | gregdata->bpo_reloc_indexes[gregdata->reloc_request[i].bpo_reloc_no] | |
2803 | = i; | |
b34976b6 | 2804 | *again = TRUE; |
930b4cb2 HPN |
2805 | } |
2806 | ||
2807 | /* Allocate register numbers (indexing from 0). Stop at the first | |
2808 | non-valid reloc. */ | |
2809 | for (i = 0, regindex = 0, prev_base = gregdata->reloc_request[0].value; | |
2810 | i < gregdata->n_bpo_relocs; | |
2811 | i++) | |
2812 | { | |
2813 | if (gregdata->reloc_request[i].value > prev_base + 255) | |
2814 | { | |
2815 | regindex++; | |
2816 | prev_base = gregdata->reloc_request[i].value; | |
2817 | } | |
2818 | gregdata->reloc_request[i].regindex = regindex; | |
2819 | gregdata->reloc_request[i].offset | |
2820 | = gregdata->reloc_request[i].value - prev_base; | |
2821 | } | |
2822 | ||
2823 | /* If it's not the same as the last time, we need to relax again, | |
2824 | because the size of the section has changed. I'm not sure we | |
2825 | actually need to do any adjustments since the shrinking happens | |
2826 | at the start of this section, but better safe than sorry. */ | |
2827 | if (gregdata->n_allocated_bpo_gregs != regindex + 1) | |
2828 | { | |
2829 | gregdata->n_allocated_bpo_gregs = regindex + 1; | |
b34976b6 | 2830 | *again = TRUE; |
930b4cb2 HPN |
2831 | } |
2832 | ||
eea6121a | 2833 | bpo_gregs_section->size = (regindex + 1) * 8; |
930b4cb2 HPN |
2834 | } |
2835 | ||
6cdc0ccc | 2836 | if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents) |
930b4cb2 HPN |
2837 | { |
2838 | if (! link_info->keep_memory) | |
6cdc0ccc AM |
2839 | free (isymbuf); |
2840 | else | |
930b4cb2 | 2841 | { |
6cdc0ccc AM |
2842 | /* Cache the symbols for elf_link_input_bfd. */ |
2843 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
930b4cb2 HPN |
2844 | } |
2845 | } | |
2846 | ||
284d826d HPN |
2847 | BFD_ASSERT(pjsno == mmix_elf_section_data (sec)->pjs.n_pushj_relocs); |
2848 | ||
6cdc0ccc AM |
2849 | if (internal_relocs != NULL |
2850 | && elf_section_data (sec)->relocs != internal_relocs) | |
2851 | free (internal_relocs); | |
2852 | ||
eea6121a | 2853 | if (sec->size < size + mmix_elf_section_data (sec)->pjs.stubs_size_sum) |
f60ebe14 HPN |
2854 | abort (); |
2855 | ||
eea6121a | 2856 | if (sec->size > size + mmix_elf_section_data (sec)->pjs.stubs_size_sum) |
f60ebe14 | 2857 | { |
eea6121a | 2858 | sec->size = size + mmix_elf_section_data (sec)->pjs.stubs_size_sum; |
f60ebe14 HPN |
2859 | *again = TRUE; |
2860 | } | |
2861 | ||
b34976b6 | 2862 | return TRUE; |
930b4cb2 HPN |
2863 | |
2864 | error_return: | |
6cdc0ccc AM |
2865 | if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents) |
2866 | free (isymbuf); | |
2867 | if (internal_relocs != NULL | |
2868 | && elf_section_data (sec)->relocs != internal_relocs) | |
2869 | free (internal_relocs); | |
b34976b6 | 2870 | return FALSE; |
930b4cb2 HPN |
2871 | } |
2872 | \f | |
3c3bdf30 NC |
2873 | #define ELF_ARCH bfd_arch_mmix |
2874 | #define ELF_MACHINE_CODE EM_MMIX | |
2875 | ||
2876 | /* According to mmix-doc page 36 (paragraph 45), this should be (1LL << 48LL). | |
2877 | However, that's too much for something somewhere in the linker part of | |
2878 | BFD; perhaps the start-address has to be a non-zero multiple of this | |
2879 | number, or larger than this number. The symptom is that the linker | |
2880 | complains: "warning: allocated section `.text' not in segment". We | |
2881 | settle for 64k; the page-size used in examples is 8k. | |
2882 | #define ELF_MAXPAGESIZE 0x10000 | |
2883 | ||
2884 | Unfortunately, this causes excessive padding in the supposedly small | |
2885 | for-education programs that are the expected usage (where people would | |
2886 | inspect output). We stick to 256 bytes just to have *some* default | |
2887 | alignment. */ | |
2888 | #define ELF_MAXPAGESIZE 0x100 | |
2889 | ||
6d00b590 | 2890 | #define TARGET_BIG_SYM mmix_elf64_vec |
3c3bdf30 NC |
2891 | #define TARGET_BIG_NAME "elf64-mmix" |
2892 | ||
2893 | #define elf_info_to_howto_rel NULL | |
2894 | #define elf_info_to_howto mmix_info_to_howto_rela | |
2895 | #define elf_backend_relocate_section mmix_elf_relocate_section | |
2896 | #define elf_backend_gc_mark_hook mmix_elf_gc_mark_hook | |
930b4cb2 | 2897 | |
3c3bdf30 NC |
2898 | #define elf_backend_link_output_symbol_hook \ |
2899 | mmix_elf_link_output_symbol_hook | |
2900 | #define elf_backend_add_symbol_hook mmix_elf_add_symbol_hook | |
2901 | ||
2902 | #define elf_backend_check_relocs mmix_elf_check_relocs | |
2903 | #define elf_backend_symbol_processing mmix_elf_symbol_processing | |
74541ad4 AM |
2904 | #define elf_backend_omit_section_dynsym \ |
2905 | ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) | |
3c3bdf30 | 2906 | |
cd5b2bab AM |
2907 | #define bfd_elf64_bfd_copy_link_hash_symbol_type \ |
2908 | _bfd_generic_copy_link_hash_symbol_type | |
2909 | ||
3c3bdf30 NC |
2910 | #define bfd_elf64_bfd_is_local_label_name \ |
2911 | mmix_elf_is_local_label_name | |
2912 | ||
2913 | #define elf_backend_may_use_rel_p 0 | |
2914 | #define elf_backend_may_use_rela_p 1 | |
2915 | #define elf_backend_default_use_rela_p 1 | |
2916 | ||
2917 | #define elf_backend_can_gc_sections 1 | |
2918 | #define elf_backend_section_from_bfd_section \ | |
2919 | mmix_elf_section_from_bfd_section | |
2920 | ||
f0abc2a1 | 2921 | #define bfd_elf64_new_section_hook mmix_elf_new_section_hook |
3c3bdf30 | 2922 | #define bfd_elf64_bfd_final_link mmix_elf_final_link |
930b4cb2 | 2923 | #define bfd_elf64_bfd_relax_section mmix_elf_relax_section |
3c3bdf30 NC |
2924 | |
2925 | #include "elf64-target.h" |