Commit | Line | Data |
---|---|---|
3c3bdf30 | 1 | /* MMIX-specific support for 64-bit ELF. |
dbaa2011 AM |
2 | Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009, 2010, 2011, |
3 | 2012 | |
f592407e | 4 | Free Software Foundation, Inc. |
3c3bdf30 NC |
5 | Contributed by Hans-Peter Nilsson <hp@bitrange.com> |
6 | ||
cd123cb7 | 7 | This file is part of BFD, the Binary File Descriptor library. |
3c3bdf30 | 8 | |
cd123cb7 NC |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 3 of the License, or | |
12 | (at your option) any later version. | |
3c3bdf30 | 13 | |
cd123cb7 NC |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
22 | MA 02110-1301, USA. */ | |
3c3bdf30 | 23 | |
3c3bdf30 NC |
24 | |
25 | /* No specific ABI or "processor-specific supplement" defined. */ | |
26 | ||
27 | /* TODO: | |
f60ebe14 HPN |
28 | - "Traditional" linker relaxation (shrinking whole sections). |
29 | - Merge reloc stubs jumping to same location. | |
30 | - GETA stub relaxation (call a stub for out of range new | |
31 | R_MMIX_GETA_STUBBABLE). */ | |
3c3bdf30 | 32 | |
3c3bdf30 | 33 | #include "sysdep.h" |
3db64b00 | 34 | #include "bfd.h" |
3c3bdf30 NC |
35 | #include "libbfd.h" |
36 | #include "elf-bfd.h" | |
37 | #include "elf/mmix.h" | |
38 | #include "opcode/mmix.h" | |
39 | ||
40 | #define MINUS_ONE (((bfd_vma) 0) - 1) | |
41 | ||
f60ebe14 HPN |
42 | #define MAX_PUSHJ_STUB_SIZE (5 * 4) |
43 | ||
3c3bdf30 NC |
44 | /* Put these everywhere in new code. */ |
45 | #define FATAL_DEBUG \ | |
46 | _bfd_abort (__FILE__, __LINE__, \ | |
47 | "Internal: Non-debugged code (test-case missing)") | |
48 | ||
49 | #define BAD_CASE(x) \ | |
50 | _bfd_abort (__FILE__, __LINE__, \ | |
51 | "bad case for " #x) | |
52 | ||
f0abc2a1 AM |
53 | struct _mmix_elf_section_data |
54 | { | |
55 | struct bfd_elf_section_data elf; | |
56 | union | |
57 | { | |
58 | struct bpo_reloc_section_info *reloc; | |
59 | struct bpo_greg_section_info *greg; | |
60 | } bpo; | |
f60ebe14 HPN |
61 | |
62 | struct pushj_stub_info | |
63 | { | |
64 | /* Maximum number of stubs needed for this section. */ | |
65 | bfd_size_type n_pushj_relocs; | |
66 | ||
67 | /* Size of stubs after a mmix_elf_relax_section round. */ | |
68 | bfd_size_type stubs_size_sum; | |
69 | ||
70 | /* Per-reloc stubs_size_sum information. The stubs_size_sum member is the sum | |
71 | of these. Allocated in mmix_elf_check_common_relocs. */ | |
72 | bfd_size_type *stub_size; | |
73 | ||
74 | /* Offset of next stub during relocation. Somewhat redundant with the | |
75 | above: error coverage is easier and we don't have to reset the | |
76 | stubs_size_sum for relocation. */ | |
77 | bfd_size_type stub_offset; | |
78 | } pjs; | |
18978b27 HPN |
79 | |
80 | /* Whether there has been a warning that this section could not be | |
81 | linked due to a specific cause. FIXME: a way to access the | |
82 | linker info or output section, then stuff the limiter guard | |
83 | there. */ | |
84 | bfd_boolean has_warned_bpo; | |
85 | bfd_boolean has_warned_pushj; | |
f0abc2a1 AM |
86 | }; |
87 | ||
88 | #define mmix_elf_section_data(sec) \ | |
68bfbfcc | 89 | ((struct _mmix_elf_section_data *) elf_section_data (sec)) |
f0abc2a1 | 90 | |
930b4cb2 | 91 | /* For each section containing a base-plus-offset (BPO) reloc, we attach |
f0abc2a1 | 92 | this struct as mmix_elf_section_data (section)->bpo, which is otherwise |
930b4cb2 HPN |
93 | NULL. */ |
94 | struct bpo_reloc_section_info | |
95 | { | |
96 | /* The base is 1; this is the first number in this section. */ | |
97 | size_t first_base_plus_offset_reloc; | |
98 | ||
99 | /* Number of BPO-relocs in this section. */ | |
100 | size_t n_bpo_relocs_this_section; | |
101 | ||
102 | /* Running index, used at relocation time. */ | |
103 | size_t bpo_index; | |
104 | ||
105 | /* We don't have access to the bfd_link_info struct in | |
106 | mmix_final_link_relocate. What we really want to get at is the | |
107 | global single struct greg_relocation, so we stash it here. */ | |
108 | asection *bpo_greg_section; | |
109 | }; | |
110 | ||
111 | /* Helper struct (in global context) for the one below. | |
112 | There's one of these created for every BPO reloc. */ | |
113 | struct bpo_reloc_request | |
114 | { | |
115 | bfd_vma value; | |
116 | ||
117 | /* Valid after relaxation. The base is 0; the first register number | |
118 | must be added. The offset is in range 0..255. */ | |
119 | size_t regindex; | |
120 | size_t offset; | |
121 | ||
122 | /* The order number for this BPO reloc, corresponding to the order in | |
123 | which BPO relocs were found. Used to create an index after reloc | |
124 | requests are sorted. */ | |
125 | size_t bpo_reloc_no; | |
126 | ||
127 | /* Set when the value is computed. Better than coding "guard values" | |
b34976b6 | 128 | into the other members. Is FALSE only for BPO relocs in a GC:ed |
930b4cb2 | 129 | section. */ |
b34976b6 | 130 | bfd_boolean valid; |
930b4cb2 HPN |
131 | }; |
132 | ||
f0abc2a1 | 133 | /* We attach this as mmix_elf_section_data (sec)->bpo in the linker-allocated |
930b4cb2 HPN |
134 | greg contents section (MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME), |
135 | which is linked into the register contents section | |
136 | (MMIX_REG_CONTENTS_SECTION_NAME). This section is created by the | |
137 | linker; using the same hook as for usual with BPO relocs does not | |
138 | collide. */ | |
139 | struct bpo_greg_section_info | |
140 | { | |
141 | /* After GC, this reflects the number of remaining, non-excluded | |
142 | BPO-relocs. */ | |
143 | size_t n_bpo_relocs; | |
144 | ||
145 | /* This is the number of allocated bpo_reloc_requests; the size of | |
146 | sorted_indexes. Valid after the check.*relocs functions are called | |
147 | for all incoming sections. It includes the number of BPO relocs in | |
148 | sections that were GC:ed. */ | |
149 | size_t n_max_bpo_relocs; | |
150 | ||
151 | /* A counter used to find out when to fold the BPO gregs, since we | |
152 | don't have a single "after-relaxation" hook. */ | |
153 | size_t n_remaining_bpo_relocs_this_relaxation_round; | |
154 | ||
155 | /* The number of linker-allocated GREGs resulting from BPO relocs. | |
f60ebe14 HPN |
156 | This is an approximation after _bfd_mmix_before_linker_allocation |
157 | and supposedly accurate after mmix_elf_relax_section is called for | |
158 | all incoming non-collected sections. */ | |
930b4cb2 HPN |
159 | size_t n_allocated_bpo_gregs; |
160 | ||
161 | /* Index into reloc_request[], sorted on increasing "value", secondary | |
162 | by increasing index for strict sorting order. */ | |
163 | size_t *bpo_reloc_indexes; | |
164 | ||
165 | /* An array of all relocations, with the "value" member filled in by | |
166 | the relaxation function. */ | |
167 | struct bpo_reloc_request *reloc_request; | |
168 | }; | |
169 | ||
3c3bdf30 | 170 | |
2c3fc389 | 171 | extern bfd_boolean mmix_elf_final_link (bfd *, struct bfd_link_info *); |
3c3bdf30 | 172 | |
2c3fc389 | 173 | extern void mmix_elf_symbol_processing (bfd *, asymbol *); |
3c3bdf30 | 174 | |
4fa5c2a8 HPN |
175 | /* Only intended to be called from a debugger. */ |
176 | extern void mmix_dump_bpo_gregs | |
2c3fc389 | 177 | (struct bfd_link_info *, bfd_error_handler_type); |
4fa5c2a8 | 178 | |
f60ebe14 | 179 | static void |
2c3fc389 NC |
180 | mmix_set_relaxable_size (bfd *, asection *, void *); |
181 | static bfd_reloc_status_type | |
182 | mmix_elf_reloc (bfd *, arelent *, asymbol *, void *, | |
183 | asection *, bfd *, char **); | |
184 | static bfd_reloc_status_type | |
185 | mmix_final_link_relocate (reloc_howto_type *, asection *, bfd_byte *, bfd_vma, | |
186 | bfd_signed_vma, bfd_vma, const char *, asection *, | |
187 | char **); | |
f60ebe14 | 188 | |
f60ebe14 | 189 | |
3c3bdf30 NC |
190 | /* Watch out: this currently needs to have elements with the same index as |
191 | their R_MMIX_ number. */ | |
192 | static reloc_howto_type elf_mmix_howto_table[] = | |
193 | { | |
194 | /* This reloc does nothing. */ | |
195 | HOWTO (R_MMIX_NONE, /* type */ | |
196 | 0, /* rightshift */ | |
197 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
198 | 32, /* bitsize */ | |
b34976b6 | 199 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
200 | 0, /* bitpos */ |
201 | complain_overflow_bitfield, /* complain_on_overflow */ | |
202 | bfd_elf_generic_reloc, /* special_function */ | |
203 | "R_MMIX_NONE", /* name */ | |
b34976b6 | 204 | FALSE, /* partial_inplace */ |
3c3bdf30 NC |
205 | 0, /* src_mask */ |
206 | 0, /* dst_mask */ | |
b34976b6 | 207 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
208 | |
209 | /* An 8 bit absolute relocation. */ | |
210 | HOWTO (R_MMIX_8, /* type */ | |
211 | 0, /* rightshift */ | |
212 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
213 | 8, /* bitsize */ | |
b34976b6 | 214 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
215 | 0, /* bitpos */ |
216 | complain_overflow_bitfield, /* complain_on_overflow */ | |
217 | bfd_elf_generic_reloc, /* special_function */ | |
218 | "R_MMIX_8", /* name */ | |
b34976b6 | 219 | FALSE, /* partial_inplace */ |
930b4cb2 | 220 | 0, /* src_mask */ |
3c3bdf30 | 221 | 0xff, /* dst_mask */ |
b34976b6 | 222 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
223 | |
224 | /* An 16 bit absolute relocation. */ | |
225 | HOWTO (R_MMIX_16, /* type */ | |
226 | 0, /* rightshift */ | |
227 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
228 | 16, /* bitsize */ | |
b34976b6 | 229 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
230 | 0, /* bitpos */ |
231 | complain_overflow_bitfield, /* complain_on_overflow */ | |
232 | bfd_elf_generic_reloc, /* special_function */ | |
233 | "R_MMIX_16", /* name */ | |
b34976b6 | 234 | FALSE, /* partial_inplace */ |
930b4cb2 | 235 | 0, /* src_mask */ |
3c3bdf30 | 236 | 0xffff, /* dst_mask */ |
b34976b6 | 237 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
238 | |
239 | /* An 24 bit absolute relocation. */ | |
240 | HOWTO (R_MMIX_24, /* type */ | |
241 | 0, /* rightshift */ | |
242 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
243 | 24, /* bitsize */ | |
b34976b6 | 244 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
245 | 0, /* bitpos */ |
246 | complain_overflow_bitfield, /* complain_on_overflow */ | |
247 | bfd_elf_generic_reloc, /* special_function */ | |
248 | "R_MMIX_24", /* name */ | |
b34976b6 | 249 | FALSE, /* partial_inplace */ |
930b4cb2 | 250 | ~0xffffff, /* src_mask */ |
3c3bdf30 | 251 | 0xffffff, /* dst_mask */ |
b34976b6 | 252 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
253 | |
254 | /* A 32 bit absolute relocation. */ | |
255 | HOWTO (R_MMIX_32, /* type */ | |
256 | 0, /* rightshift */ | |
257 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
258 | 32, /* bitsize */ | |
b34976b6 | 259 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
260 | 0, /* bitpos */ |
261 | complain_overflow_bitfield, /* complain_on_overflow */ | |
262 | bfd_elf_generic_reloc, /* special_function */ | |
263 | "R_MMIX_32", /* name */ | |
b34976b6 | 264 | FALSE, /* partial_inplace */ |
930b4cb2 | 265 | 0, /* src_mask */ |
3c3bdf30 | 266 | 0xffffffff, /* dst_mask */ |
b34976b6 | 267 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
268 | |
269 | /* 64 bit relocation. */ | |
270 | HOWTO (R_MMIX_64, /* type */ | |
271 | 0, /* rightshift */ | |
272 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
273 | 64, /* bitsize */ | |
b34976b6 | 274 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
275 | 0, /* bitpos */ |
276 | complain_overflow_bitfield, /* complain_on_overflow */ | |
277 | bfd_elf_generic_reloc, /* special_function */ | |
278 | "R_MMIX_64", /* name */ | |
b34976b6 | 279 | FALSE, /* partial_inplace */ |
930b4cb2 | 280 | 0, /* src_mask */ |
3c3bdf30 | 281 | MINUS_ONE, /* dst_mask */ |
b34976b6 | 282 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
283 | |
284 | /* An 8 bit PC-relative relocation. */ | |
285 | HOWTO (R_MMIX_PC_8, /* type */ | |
286 | 0, /* rightshift */ | |
287 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
288 | 8, /* bitsize */ | |
b34976b6 | 289 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
290 | 0, /* bitpos */ |
291 | complain_overflow_bitfield, /* complain_on_overflow */ | |
292 | bfd_elf_generic_reloc, /* special_function */ | |
293 | "R_MMIX_PC_8", /* name */ | |
b34976b6 | 294 | FALSE, /* partial_inplace */ |
930b4cb2 | 295 | 0, /* src_mask */ |
3c3bdf30 | 296 | 0xff, /* dst_mask */ |
b34976b6 | 297 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
298 | |
299 | /* An 16 bit PC-relative relocation. */ | |
300 | HOWTO (R_MMIX_PC_16, /* type */ | |
301 | 0, /* rightshift */ | |
302 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
303 | 16, /* bitsize */ | |
b34976b6 | 304 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
305 | 0, /* bitpos */ |
306 | complain_overflow_bitfield, /* complain_on_overflow */ | |
307 | bfd_elf_generic_reloc, /* special_function */ | |
308 | "R_MMIX_PC_16", /* name */ | |
b34976b6 | 309 | FALSE, /* partial_inplace */ |
930b4cb2 | 310 | 0, /* src_mask */ |
3c3bdf30 | 311 | 0xffff, /* dst_mask */ |
b34976b6 | 312 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
313 | |
314 | /* An 24 bit PC-relative relocation. */ | |
315 | HOWTO (R_MMIX_PC_24, /* type */ | |
316 | 0, /* rightshift */ | |
317 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
318 | 24, /* bitsize */ | |
b34976b6 | 319 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
320 | 0, /* bitpos */ |
321 | complain_overflow_bitfield, /* complain_on_overflow */ | |
322 | bfd_elf_generic_reloc, /* special_function */ | |
323 | "R_MMIX_PC_24", /* name */ | |
b34976b6 | 324 | FALSE, /* partial_inplace */ |
930b4cb2 | 325 | ~0xffffff, /* src_mask */ |
3c3bdf30 | 326 | 0xffffff, /* dst_mask */ |
b34976b6 | 327 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
328 | |
329 | /* A 32 bit absolute PC-relative relocation. */ | |
330 | HOWTO (R_MMIX_PC_32, /* type */ | |
331 | 0, /* rightshift */ | |
332 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
333 | 32, /* bitsize */ | |
b34976b6 | 334 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
335 | 0, /* bitpos */ |
336 | complain_overflow_bitfield, /* complain_on_overflow */ | |
337 | bfd_elf_generic_reloc, /* special_function */ | |
338 | "R_MMIX_PC_32", /* name */ | |
b34976b6 | 339 | FALSE, /* partial_inplace */ |
930b4cb2 | 340 | 0, /* src_mask */ |
3c3bdf30 | 341 | 0xffffffff, /* dst_mask */ |
b34976b6 | 342 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
343 | |
344 | /* 64 bit PC-relative relocation. */ | |
345 | HOWTO (R_MMIX_PC_64, /* type */ | |
346 | 0, /* rightshift */ | |
347 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
348 | 64, /* bitsize */ | |
b34976b6 | 349 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
350 | 0, /* bitpos */ |
351 | complain_overflow_bitfield, /* complain_on_overflow */ | |
352 | bfd_elf_generic_reloc, /* special_function */ | |
353 | "R_MMIX_PC_64", /* name */ | |
b34976b6 | 354 | FALSE, /* partial_inplace */ |
930b4cb2 | 355 | 0, /* src_mask */ |
3c3bdf30 | 356 | MINUS_ONE, /* dst_mask */ |
b34976b6 | 357 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
358 | |
359 | /* GNU extension to record C++ vtable hierarchy. */ | |
360 | HOWTO (R_MMIX_GNU_VTINHERIT, /* type */ | |
361 | 0, /* rightshift */ | |
362 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
363 | 0, /* bitsize */ | |
b34976b6 | 364 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
365 | 0, /* bitpos */ |
366 | complain_overflow_dont, /* complain_on_overflow */ | |
367 | NULL, /* special_function */ | |
368 | "R_MMIX_GNU_VTINHERIT", /* name */ | |
b34976b6 | 369 | FALSE, /* partial_inplace */ |
3c3bdf30 NC |
370 | 0, /* src_mask */ |
371 | 0, /* dst_mask */ | |
b34976b6 | 372 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
373 | |
374 | /* GNU extension to record C++ vtable member usage. */ | |
375 | HOWTO (R_MMIX_GNU_VTENTRY, /* type */ | |
376 | 0, /* rightshift */ | |
377 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
378 | 0, /* bitsize */ | |
b34976b6 | 379 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
380 | 0, /* bitpos */ |
381 | complain_overflow_dont, /* complain_on_overflow */ | |
382 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
383 | "R_MMIX_GNU_VTENTRY", /* name */ | |
b34976b6 | 384 | FALSE, /* partial_inplace */ |
3c3bdf30 NC |
385 | 0, /* src_mask */ |
386 | 0, /* dst_mask */ | |
b34976b6 | 387 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
388 | |
389 | /* The GETA relocation is supposed to get any address that could | |
390 | possibly be reached by the GETA instruction. It can silently expand | |
391 | to get a 64-bit operand, but will complain if any of the two least | |
392 | significant bits are set. The howto members reflect a simple GETA. */ | |
393 | HOWTO (R_MMIX_GETA, /* type */ | |
394 | 2, /* rightshift */ | |
395 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
396 | 19, /* bitsize */ | |
b34976b6 | 397 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
398 | 0, /* bitpos */ |
399 | complain_overflow_signed, /* complain_on_overflow */ | |
400 | mmix_elf_reloc, /* special_function */ | |
401 | "R_MMIX_GETA", /* name */ | |
b34976b6 | 402 | FALSE, /* partial_inplace */ |
930b4cb2 | 403 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 404 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 405 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
406 | |
407 | HOWTO (R_MMIX_GETA_1, /* type */ | |
408 | 2, /* rightshift */ | |
409 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
410 | 19, /* bitsize */ | |
b34976b6 | 411 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
412 | 0, /* bitpos */ |
413 | complain_overflow_signed, /* complain_on_overflow */ | |
414 | mmix_elf_reloc, /* special_function */ | |
415 | "R_MMIX_GETA_1", /* name */ | |
b34976b6 | 416 | FALSE, /* partial_inplace */ |
930b4cb2 | 417 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 418 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 419 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
420 | |
421 | HOWTO (R_MMIX_GETA_2, /* type */ | |
422 | 2, /* rightshift */ | |
423 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
424 | 19, /* bitsize */ | |
b34976b6 | 425 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
426 | 0, /* bitpos */ |
427 | complain_overflow_signed, /* complain_on_overflow */ | |
428 | mmix_elf_reloc, /* special_function */ | |
429 | "R_MMIX_GETA_2", /* name */ | |
b34976b6 | 430 | FALSE, /* partial_inplace */ |
930b4cb2 | 431 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 432 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 433 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
434 | |
435 | HOWTO (R_MMIX_GETA_3, /* type */ | |
436 | 2, /* rightshift */ | |
437 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
438 | 19, /* bitsize */ | |
b34976b6 | 439 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
440 | 0, /* bitpos */ |
441 | complain_overflow_signed, /* complain_on_overflow */ | |
442 | mmix_elf_reloc, /* special_function */ | |
443 | "R_MMIX_GETA_3", /* name */ | |
b34976b6 | 444 | FALSE, /* partial_inplace */ |
930b4cb2 | 445 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 446 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 447 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
448 | |
449 | /* The conditional branches are supposed to reach any (code) address. | |
450 | It can silently expand to a 64-bit operand, but will emit an error if | |
451 | any of the two least significant bits are set. The howto members | |
452 | reflect a simple branch. */ | |
453 | HOWTO (R_MMIX_CBRANCH, /* type */ | |
454 | 2, /* rightshift */ | |
455 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
456 | 19, /* bitsize */ | |
b34976b6 | 457 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
458 | 0, /* bitpos */ |
459 | complain_overflow_signed, /* complain_on_overflow */ | |
460 | mmix_elf_reloc, /* special_function */ | |
461 | "R_MMIX_CBRANCH", /* name */ | |
b34976b6 | 462 | FALSE, /* partial_inplace */ |
930b4cb2 | 463 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 464 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 465 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
466 | |
467 | HOWTO (R_MMIX_CBRANCH_J, /* type */ | |
468 | 2, /* rightshift */ | |
469 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
470 | 19, /* bitsize */ | |
b34976b6 | 471 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
472 | 0, /* bitpos */ |
473 | complain_overflow_signed, /* complain_on_overflow */ | |
474 | mmix_elf_reloc, /* special_function */ | |
475 | "R_MMIX_CBRANCH_J", /* name */ | |
b34976b6 | 476 | FALSE, /* partial_inplace */ |
930b4cb2 | 477 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 478 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 479 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
480 | |
481 | HOWTO (R_MMIX_CBRANCH_1, /* type */ | |
482 | 2, /* rightshift */ | |
483 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
484 | 19, /* bitsize */ | |
b34976b6 | 485 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
486 | 0, /* bitpos */ |
487 | complain_overflow_signed, /* complain_on_overflow */ | |
488 | mmix_elf_reloc, /* special_function */ | |
489 | "R_MMIX_CBRANCH_1", /* name */ | |
b34976b6 | 490 | FALSE, /* partial_inplace */ |
930b4cb2 | 491 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 492 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 493 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
494 | |
495 | HOWTO (R_MMIX_CBRANCH_2, /* type */ | |
496 | 2, /* rightshift */ | |
497 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
498 | 19, /* bitsize */ | |
b34976b6 | 499 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
500 | 0, /* bitpos */ |
501 | complain_overflow_signed, /* complain_on_overflow */ | |
502 | mmix_elf_reloc, /* special_function */ | |
503 | "R_MMIX_CBRANCH_2", /* name */ | |
b34976b6 | 504 | FALSE, /* partial_inplace */ |
930b4cb2 | 505 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 506 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 507 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
508 | |
509 | HOWTO (R_MMIX_CBRANCH_3, /* type */ | |
510 | 2, /* rightshift */ | |
511 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
512 | 19, /* bitsize */ | |
b34976b6 | 513 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
514 | 0, /* bitpos */ |
515 | complain_overflow_signed, /* complain_on_overflow */ | |
516 | mmix_elf_reloc, /* special_function */ | |
517 | "R_MMIX_CBRANCH_3", /* name */ | |
b34976b6 | 518 | FALSE, /* partial_inplace */ |
930b4cb2 | 519 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 520 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 521 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
522 | |
523 | /* The PUSHJ instruction can reach any (code) address, as long as it's | |
524 | the beginning of a function (no usable restriction). It can silently | |
525 | expand to a 64-bit operand, but will emit an error if any of the two | |
f60ebe14 HPN |
526 | least significant bits are set. It can also expand into a call to a |
527 | stub; see R_MMIX_PUSHJ_STUBBABLE. The howto members reflect a simple | |
3c3bdf30 NC |
528 | PUSHJ. */ |
529 | HOWTO (R_MMIX_PUSHJ, /* type */ | |
530 | 2, /* rightshift */ | |
531 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
532 | 19, /* bitsize */ | |
b34976b6 | 533 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
534 | 0, /* bitpos */ |
535 | complain_overflow_signed, /* complain_on_overflow */ | |
536 | mmix_elf_reloc, /* special_function */ | |
537 | "R_MMIX_PUSHJ", /* name */ | |
b34976b6 | 538 | FALSE, /* partial_inplace */ |
930b4cb2 | 539 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 540 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 541 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
542 | |
543 | HOWTO (R_MMIX_PUSHJ_1, /* type */ | |
544 | 2, /* rightshift */ | |
545 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
546 | 19, /* bitsize */ | |
b34976b6 | 547 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
548 | 0, /* bitpos */ |
549 | complain_overflow_signed, /* complain_on_overflow */ | |
550 | mmix_elf_reloc, /* special_function */ | |
551 | "R_MMIX_PUSHJ_1", /* name */ | |
b34976b6 | 552 | FALSE, /* partial_inplace */ |
930b4cb2 | 553 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 554 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 555 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
556 | |
557 | HOWTO (R_MMIX_PUSHJ_2, /* type */ | |
558 | 2, /* rightshift */ | |
559 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
560 | 19, /* bitsize */ | |
b34976b6 | 561 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
562 | 0, /* bitpos */ |
563 | complain_overflow_signed, /* complain_on_overflow */ | |
564 | mmix_elf_reloc, /* special_function */ | |
565 | "R_MMIX_PUSHJ_2", /* name */ | |
b34976b6 | 566 | FALSE, /* partial_inplace */ |
930b4cb2 | 567 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 568 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 569 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
570 | |
571 | HOWTO (R_MMIX_PUSHJ_3, /* type */ | |
572 | 2, /* rightshift */ | |
573 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
574 | 19, /* bitsize */ | |
b34976b6 | 575 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
576 | 0, /* bitpos */ |
577 | complain_overflow_signed, /* complain_on_overflow */ | |
578 | mmix_elf_reloc, /* special_function */ | |
579 | "R_MMIX_PUSHJ_3", /* name */ | |
b34976b6 | 580 | FALSE, /* partial_inplace */ |
930b4cb2 | 581 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 582 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 583 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
584 | |
585 | /* A JMP is supposed to reach any (code) address. By itself, it can | |
586 | reach +-64M; the expansion can reach all 64 bits. Note that the 64M | |
587 | limit is soon reached if you link the program in wildly different | |
588 | memory segments. The howto members reflect a trivial JMP. */ | |
589 | HOWTO (R_MMIX_JMP, /* type */ | |
590 | 2, /* rightshift */ | |
591 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
592 | 27, /* bitsize */ | |
b34976b6 | 593 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
594 | 0, /* bitpos */ |
595 | complain_overflow_signed, /* complain_on_overflow */ | |
596 | mmix_elf_reloc, /* special_function */ | |
597 | "R_MMIX_JMP", /* name */ | |
b34976b6 | 598 | FALSE, /* partial_inplace */ |
930b4cb2 | 599 | ~0x1ffffff, /* src_mask */ |
3c3bdf30 | 600 | 0x1ffffff, /* dst_mask */ |
b34976b6 | 601 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
602 | |
603 | HOWTO (R_MMIX_JMP_1, /* type */ | |
604 | 2, /* rightshift */ | |
605 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
606 | 27, /* bitsize */ | |
b34976b6 | 607 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
608 | 0, /* bitpos */ |
609 | complain_overflow_signed, /* complain_on_overflow */ | |
610 | mmix_elf_reloc, /* special_function */ | |
611 | "R_MMIX_JMP_1", /* name */ | |
b34976b6 | 612 | FALSE, /* partial_inplace */ |
930b4cb2 | 613 | ~0x1ffffff, /* src_mask */ |
3c3bdf30 | 614 | 0x1ffffff, /* dst_mask */ |
b34976b6 | 615 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
616 | |
617 | HOWTO (R_MMIX_JMP_2, /* type */ | |
618 | 2, /* rightshift */ | |
619 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
620 | 27, /* bitsize */ | |
b34976b6 | 621 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
622 | 0, /* bitpos */ |
623 | complain_overflow_signed, /* complain_on_overflow */ | |
624 | mmix_elf_reloc, /* special_function */ | |
625 | "R_MMIX_JMP_2", /* name */ | |
b34976b6 | 626 | FALSE, /* partial_inplace */ |
930b4cb2 | 627 | ~0x1ffffff, /* src_mask */ |
3c3bdf30 | 628 | 0x1ffffff, /* dst_mask */ |
b34976b6 | 629 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
630 | |
631 | HOWTO (R_MMIX_JMP_3, /* type */ | |
632 | 2, /* rightshift */ | |
633 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
634 | 27, /* bitsize */ | |
b34976b6 | 635 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
636 | 0, /* bitpos */ |
637 | complain_overflow_signed, /* complain_on_overflow */ | |
638 | mmix_elf_reloc, /* special_function */ | |
639 | "R_MMIX_JMP_3", /* name */ | |
b34976b6 | 640 | FALSE, /* partial_inplace */ |
930b4cb2 | 641 | ~0x1ffffff, /* src_mask */ |
3c3bdf30 | 642 | 0x1ffffff, /* dst_mask */ |
b34976b6 | 643 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
644 | |
645 | /* When we don't emit link-time-relaxable code from the assembler, or | |
646 | when relaxation has done all it can do, these relocs are used. For | |
647 | GETA/PUSHJ/branches. */ | |
648 | HOWTO (R_MMIX_ADDR19, /* type */ | |
649 | 2, /* rightshift */ | |
650 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
651 | 19, /* bitsize */ | |
b34976b6 | 652 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
653 | 0, /* bitpos */ |
654 | complain_overflow_signed, /* complain_on_overflow */ | |
655 | mmix_elf_reloc, /* special_function */ | |
656 | "R_MMIX_ADDR19", /* name */ | |
b34976b6 | 657 | FALSE, /* partial_inplace */ |
930b4cb2 | 658 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 659 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 660 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
661 | |
662 | /* For JMP. */ | |
663 | HOWTO (R_MMIX_ADDR27, /* type */ | |
664 | 2, /* rightshift */ | |
665 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
666 | 27, /* bitsize */ | |
b34976b6 | 667 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
668 | 0, /* bitpos */ |
669 | complain_overflow_signed, /* complain_on_overflow */ | |
670 | mmix_elf_reloc, /* special_function */ | |
671 | "R_MMIX_ADDR27", /* name */ | |
b34976b6 | 672 | FALSE, /* partial_inplace */ |
930b4cb2 | 673 | ~0x1ffffff, /* src_mask */ |
3c3bdf30 | 674 | 0x1ffffff, /* dst_mask */ |
b34976b6 | 675 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
676 | |
677 | /* A general register or the value 0..255. If a value, then the | |
678 | instruction (offset -3) needs adjusting. */ | |
679 | HOWTO (R_MMIX_REG_OR_BYTE, /* type */ | |
680 | 0, /* rightshift */ | |
681 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
682 | 8, /* bitsize */ | |
b34976b6 | 683 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
684 | 0, /* bitpos */ |
685 | complain_overflow_bitfield, /* complain_on_overflow */ | |
686 | mmix_elf_reloc, /* special_function */ | |
687 | "R_MMIX_REG_OR_BYTE", /* name */ | |
b34976b6 | 688 | FALSE, /* partial_inplace */ |
930b4cb2 | 689 | 0, /* src_mask */ |
3c3bdf30 | 690 | 0xff, /* dst_mask */ |
b34976b6 | 691 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
692 | |
693 | /* A general register. */ | |
694 | HOWTO (R_MMIX_REG, /* type */ | |
695 | 0, /* rightshift */ | |
696 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
697 | 8, /* bitsize */ | |
b34976b6 | 698 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
699 | 0, /* bitpos */ |
700 | complain_overflow_bitfield, /* complain_on_overflow */ | |
701 | mmix_elf_reloc, /* special_function */ | |
702 | "R_MMIX_REG", /* name */ | |
b34976b6 | 703 | FALSE, /* partial_inplace */ |
930b4cb2 | 704 | 0, /* src_mask */ |
3c3bdf30 | 705 | 0xff, /* dst_mask */ |
b34976b6 | 706 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
707 | |
708 | /* A register plus an index, corresponding to the relocation expression. | |
709 | The sizes must correspond to the valid range of the expression, while | |
710 | the bitmasks correspond to what we store in the image. */ | |
711 | HOWTO (R_MMIX_BASE_PLUS_OFFSET, /* type */ | |
712 | 0, /* rightshift */ | |
713 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
714 | 64, /* bitsize */ | |
b34976b6 | 715 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
716 | 0, /* bitpos */ |
717 | complain_overflow_bitfield, /* complain_on_overflow */ | |
718 | mmix_elf_reloc, /* special_function */ | |
719 | "R_MMIX_BASE_PLUS_OFFSET", /* name */ | |
b34976b6 | 720 | FALSE, /* partial_inplace */ |
930b4cb2 | 721 | 0, /* src_mask */ |
3c3bdf30 | 722 | 0xffff, /* dst_mask */ |
b34976b6 | 723 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
724 | |
725 | /* A "magic" relocation for a LOCAL expression, asserting that the | |
726 | expression is less than the number of global registers. No actual | |
727 | modification of the contents is done. Implementing this as a | |
728 | relocation was less intrusive than e.g. putting such expressions in a | |
729 | section to discard *after* relocation. */ | |
730 | HOWTO (R_MMIX_LOCAL, /* type */ | |
731 | 0, /* rightshift */ | |
732 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
733 | 0, /* bitsize */ | |
b34976b6 | 734 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
735 | 0, /* bitpos */ |
736 | complain_overflow_dont, /* complain_on_overflow */ | |
737 | mmix_elf_reloc, /* special_function */ | |
738 | "R_MMIX_LOCAL", /* name */ | |
b34976b6 | 739 | FALSE, /* partial_inplace */ |
3c3bdf30 NC |
740 | 0, /* src_mask */ |
741 | 0, /* dst_mask */ | |
b34976b6 | 742 | FALSE), /* pcrel_offset */ |
f60ebe14 HPN |
743 | |
744 | HOWTO (R_MMIX_PUSHJ_STUBBABLE, /* type */ | |
745 | 2, /* rightshift */ | |
746 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
747 | 19, /* bitsize */ | |
748 | TRUE, /* pc_relative */ | |
749 | 0, /* bitpos */ | |
750 | complain_overflow_signed, /* complain_on_overflow */ | |
751 | mmix_elf_reloc, /* special_function */ | |
752 | "R_MMIX_PUSHJ_STUBBABLE", /* name */ | |
753 | FALSE, /* partial_inplace */ | |
754 | ~0x0100ffff, /* src_mask */ | |
755 | 0x0100ffff, /* dst_mask */ | |
756 | TRUE) /* pcrel_offset */ | |
3c3bdf30 NC |
757 | }; |
758 | ||
759 | ||
760 | /* Map BFD reloc types to MMIX ELF reloc types. */ | |
761 | ||
762 | struct mmix_reloc_map | |
763 | { | |
764 | bfd_reloc_code_real_type bfd_reloc_val; | |
765 | enum elf_mmix_reloc_type elf_reloc_val; | |
766 | }; | |
767 | ||
768 | ||
769 | static const struct mmix_reloc_map mmix_reloc_map[] = | |
770 | { | |
771 | {BFD_RELOC_NONE, R_MMIX_NONE}, | |
772 | {BFD_RELOC_8, R_MMIX_8}, | |
773 | {BFD_RELOC_16, R_MMIX_16}, | |
774 | {BFD_RELOC_24, R_MMIX_24}, | |
775 | {BFD_RELOC_32, R_MMIX_32}, | |
776 | {BFD_RELOC_64, R_MMIX_64}, | |
777 | {BFD_RELOC_8_PCREL, R_MMIX_PC_8}, | |
778 | {BFD_RELOC_16_PCREL, R_MMIX_PC_16}, | |
779 | {BFD_RELOC_24_PCREL, R_MMIX_PC_24}, | |
780 | {BFD_RELOC_32_PCREL, R_MMIX_PC_32}, | |
781 | {BFD_RELOC_64_PCREL, R_MMIX_PC_64}, | |
782 | {BFD_RELOC_VTABLE_INHERIT, R_MMIX_GNU_VTINHERIT}, | |
783 | {BFD_RELOC_VTABLE_ENTRY, R_MMIX_GNU_VTENTRY}, | |
784 | {BFD_RELOC_MMIX_GETA, R_MMIX_GETA}, | |
785 | {BFD_RELOC_MMIX_CBRANCH, R_MMIX_CBRANCH}, | |
786 | {BFD_RELOC_MMIX_PUSHJ, R_MMIX_PUSHJ}, | |
787 | {BFD_RELOC_MMIX_JMP, R_MMIX_JMP}, | |
788 | {BFD_RELOC_MMIX_ADDR19, R_MMIX_ADDR19}, | |
789 | {BFD_RELOC_MMIX_ADDR27, R_MMIX_ADDR27}, | |
790 | {BFD_RELOC_MMIX_REG_OR_BYTE, R_MMIX_REG_OR_BYTE}, | |
791 | {BFD_RELOC_MMIX_REG, R_MMIX_REG}, | |
792 | {BFD_RELOC_MMIX_BASE_PLUS_OFFSET, R_MMIX_BASE_PLUS_OFFSET}, | |
f60ebe14 HPN |
793 | {BFD_RELOC_MMIX_LOCAL, R_MMIX_LOCAL}, |
794 | {BFD_RELOC_MMIX_PUSHJ_STUBBABLE, R_MMIX_PUSHJ_STUBBABLE} | |
3c3bdf30 NC |
795 | }; |
796 | ||
797 | static reloc_howto_type * | |
2c3fc389 NC |
798 | bfd_elf64_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
799 | bfd_reloc_code_real_type code) | |
3c3bdf30 NC |
800 | { |
801 | unsigned int i; | |
802 | ||
803 | for (i = 0; | |
804 | i < sizeof (mmix_reloc_map) / sizeof (mmix_reloc_map[0]); | |
805 | i++) | |
806 | { | |
807 | if (mmix_reloc_map[i].bfd_reloc_val == code) | |
808 | return &elf_mmix_howto_table[mmix_reloc_map[i].elf_reloc_val]; | |
809 | } | |
810 | ||
811 | return NULL; | |
157090f7 AM |
812 | } |
813 | ||
814 | static reloc_howto_type * | |
815 | bfd_elf64_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
816 | const char *r_name) | |
817 | { | |
818 | unsigned int i; | |
819 | ||
820 | for (i = 0; | |
821 | i < sizeof (elf_mmix_howto_table) / sizeof (elf_mmix_howto_table[0]); | |
822 | i++) | |
823 | if (elf_mmix_howto_table[i].name != NULL | |
824 | && strcasecmp (elf_mmix_howto_table[i].name, r_name) == 0) | |
825 | return &elf_mmix_howto_table[i]; | |
826 | ||
827 | return NULL; | |
3c3bdf30 NC |
828 | } |
829 | ||
f0abc2a1 | 830 | static bfd_boolean |
2c3fc389 | 831 | mmix_elf_new_section_hook (bfd *abfd, asection *sec) |
f0abc2a1 | 832 | { |
f592407e AM |
833 | if (!sec->used_by_bfd) |
834 | { | |
835 | struct _mmix_elf_section_data *sdata; | |
836 | bfd_size_type amt = sizeof (*sdata); | |
f0abc2a1 | 837 | |
f592407e AM |
838 | sdata = bfd_zalloc (abfd, amt); |
839 | if (sdata == NULL) | |
840 | return FALSE; | |
841 | sec->used_by_bfd = sdata; | |
842 | } | |
f0abc2a1 AM |
843 | |
844 | return _bfd_elf_new_section_hook (abfd, sec); | |
845 | } | |
846 | ||
3c3bdf30 NC |
847 | |
848 | /* This function performs the actual bitfiddling and sanity check for a | |
849 | final relocation. Each relocation gets its *worst*-case expansion | |
850 | in size when it arrives here; any reduction in size should have been | |
851 | caught in linker relaxation earlier. When we get here, the relocation | |
852 | looks like the smallest instruction with SWYM:s (nop:s) appended to the | |
853 | max size. We fill in those nop:s. | |
854 | ||
855 | R_MMIX_GETA: (FIXME: Relaxation should break this up in 1, 2, 3 tetra) | |
856 | GETA $N,foo | |
857 | -> | |
858 | SETL $N,foo & 0xffff | |
859 | INCML $N,(foo >> 16) & 0xffff | |
860 | INCMH $N,(foo >> 32) & 0xffff | |
861 | INCH $N,(foo >> 48) & 0xffff | |
862 | ||
863 | R_MMIX_CBRANCH: (FIXME: Relaxation should break this up, but | |
864 | condbranches needing relaxation might be rare enough to not be | |
865 | worthwhile.) | |
866 | [P]Bcc $N,foo | |
867 | -> | |
868 | [~P]B~cc $N,.+20 | |
869 | SETL $255,foo & ... | |
870 | INCML ... | |
871 | INCMH ... | |
872 | INCH ... | |
873 | GO $255,$255,0 | |
874 | ||
875 | R_MMIX_PUSHJ: (FIXME: Relaxation...) | |
876 | PUSHJ $N,foo | |
877 | -> | |
878 | SETL $255,foo & ... | |
879 | INCML ... | |
880 | INCMH ... | |
881 | INCH ... | |
882 | PUSHGO $N,$255,0 | |
883 | ||
884 | R_MMIX_JMP: (FIXME: Relaxation...) | |
885 | JMP foo | |
886 | -> | |
887 | SETL $255,foo & ... | |
888 | INCML ... | |
889 | INCMH ... | |
890 | INCH ... | |
891 | GO $255,$255,0 | |
892 | ||
893 | R_MMIX_ADDR19 and R_MMIX_ADDR27 are just filled in. */ | |
894 | ||
895 | static bfd_reloc_status_type | |
18978b27 HPN |
896 | mmix_elf_perform_relocation (asection *isec, reloc_howto_type *howto, |
897 | void *datap, bfd_vma addr, bfd_vma value, | |
898 | char **error_message) | |
3c3bdf30 NC |
899 | { |
900 | bfd *abfd = isec->owner; | |
901 | bfd_reloc_status_type flag = bfd_reloc_ok; | |
902 | bfd_reloc_status_type r; | |
903 | int offs = 0; | |
904 | int reg = 255; | |
905 | ||
906 | /* The worst case bits are all similar SETL/INCML/INCMH/INCH sequences. | |
907 | We handle the differences here and the common sequence later. */ | |
908 | switch (howto->type) | |
909 | { | |
910 | case R_MMIX_GETA: | |
911 | offs = 0; | |
912 | reg = bfd_get_8 (abfd, (bfd_byte *) datap + 1); | |
913 | ||
914 | /* We change to an absolute value. */ | |
915 | value += addr; | |
916 | break; | |
917 | ||
918 | case R_MMIX_CBRANCH: | |
919 | { | |
920 | int in1 = bfd_get_16 (abfd, (bfd_byte *) datap) << 16; | |
921 | ||
922 | /* Invert the condition and prediction bit, and set the offset | |
923 | to five instructions ahead. | |
924 | ||
925 | We *can* do better if we want to. If the branch is found to be | |
926 | within limits, we could leave the branch as is; there'll just | |
927 | be a bunch of NOP:s after it. But we shouldn't see this | |
928 | sequence often enough that it's worth doing it. */ | |
929 | ||
930 | bfd_put_32 (abfd, | |
931 | (((in1 ^ ((PRED_INV_BIT | COND_INV_BIT) << 24)) & ~0xffff) | |
932 | | (24/4)), | |
933 | (bfd_byte *) datap); | |
934 | ||
935 | /* Put a "GO $255,$255,0" after the common sequence. */ | |
936 | bfd_put_32 (abfd, | |
937 | ((GO_INSN_BYTE | IMM_OFFSET_BIT) << 24) | 0xffff00, | |
938 | (bfd_byte *) datap + 20); | |
939 | ||
940 | /* Common sequence starts at offset 4. */ | |
941 | offs = 4; | |
942 | ||
943 | /* We change to an absolute value. */ | |
944 | value += addr; | |
945 | } | |
946 | break; | |
947 | ||
f60ebe14 HPN |
948 | case R_MMIX_PUSHJ_STUBBABLE: |
949 | /* If the address fits, we're fine. */ | |
950 | if ((value & 3) == 0 | |
951 | /* Note rightshift 0; see R_MMIX_JMP case below. */ | |
952 | && (r = bfd_check_overflow (complain_overflow_signed, | |
953 | howto->bitsize, | |
954 | 0, | |
955 | bfd_arch_bits_per_address (abfd), | |
956 | value)) == bfd_reloc_ok) | |
957 | goto pcrel_mmix_reloc_fits; | |
958 | else | |
959 | { | |
1a23a9e6 | 960 | bfd_size_type size = isec->rawsize ? isec->rawsize : isec->size; |
f60ebe14 HPN |
961 | |
962 | /* We have the bytes at the PUSHJ insn and need to get the | |
963 | position for the stub. There's supposed to be room allocated | |
964 | for the stub. */ | |
965 | bfd_byte *stubcontents | |
f075ee0c | 966 | = ((bfd_byte *) datap |
f60ebe14 | 967 | - (addr - (isec->output_section->vma + isec->output_offset)) |
eea6121a | 968 | + size |
f60ebe14 HPN |
969 | + mmix_elf_section_data (isec)->pjs.stub_offset); |
970 | bfd_vma stubaddr; | |
971 | ||
18978b27 HPN |
972 | if (mmix_elf_section_data (isec)->pjs.n_pushj_relocs == 0) |
973 | { | |
974 | /* This shouldn't happen when linking to ELF or mmo, so | |
975 | this is an attempt to link to "binary", right? We | |
976 | can't access the output bfd, so we can't verify that | |
977 | assumption. We only know that the critical | |
978 | mmix_elf_check_common_relocs has not been called, | |
979 | which happens when the output format is different | |
980 | from the input format (and is not mmo). */ | |
981 | if (! mmix_elf_section_data (isec)->has_warned_pushj) | |
982 | { | |
983 | /* For the first such error per input section, produce | |
984 | a verbose message. */ | |
985 | *error_message | |
986 | = _("invalid input relocation when producing" | |
987 | " non-ELF, non-mmo format output." | |
988 | "\n Please use the objcopy program to convert from" | |
989 | " ELF or mmo," | |
990 | "\n or assemble using" | |
991 | " \"-no-expand\" (for gcc, \"-Wa,-no-expand\""); | |
992 | mmix_elf_section_data (isec)->has_warned_pushj = TRUE; | |
993 | return bfd_reloc_dangerous; | |
994 | } | |
995 | ||
996 | /* For subsequent errors, return this one, which is | |
997 | rate-limited but looks a little bit different, | |
998 | hopefully without affecting user-friendliness. */ | |
999 | return bfd_reloc_overflow; | |
1000 | } | |
1001 | ||
f60ebe14 HPN |
1002 | /* The address doesn't fit, so redirect the PUSHJ to the |
1003 | location of the stub. */ | |
1004 | r = mmix_elf_perform_relocation (isec, | |
1005 | &elf_mmix_howto_table | |
1006 | [R_MMIX_ADDR19], | |
1007 | datap, | |
1008 | addr, | |
1009 | isec->output_section->vma | |
1010 | + isec->output_offset | |
eea6121a | 1011 | + size |
f60ebe14 HPN |
1012 | + (mmix_elf_section_data (isec) |
1013 | ->pjs.stub_offset) | |
18978b27 HPN |
1014 | - addr, |
1015 | error_message); | |
f60ebe14 HPN |
1016 | if (r != bfd_reloc_ok) |
1017 | return r; | |
1018 | ||
1019 | stubaddr | |
1020 | = (isec->output_section->vma | |
1021 | + isec->output_offset | |
eea6121a | 1022 | + size |
f60ebe14 HPN |
1023 | + mmix_elf_section_data (isec)->pjs.stub_offset); |
1024 | ||
1025 | /* We generate a simple JMP if that suffices, else the whole 5 | |
1026 | insn stub. */ | |
1027 | if (bfd_check_overflow (complain_overflow_signed, | |
1028 | elf_mmix_howto_table[R_MMIX_ADDR27].bitsize, | |
1029 | 0, | |
1030 | bfd_arch_bits_per_address (abfd), | |
1031 | addr + value - stubaddr) == bfd_reloc_ok) | |
1032 | { | |
1033 | bfd_put_32 (abfd, JMP_INSN_BYTE << 24, stubcontents); | |
1034 | r = mmix_elf_perform_relocation (isec, | |
1035 | &elf_mmix_howto_table | |
1036 | [R_MMIX_ADDR27], | |
1037 | stubcontents, | |
1038 | stubaddr, | |
18978b27 HPN |
1039 | value + addr - stubaddr, |
1040 | error_message); | |
f60ebe14 HPN |
1041 | mmix_elf_section_data (isec)->pjs.stub_offset += 4; |
1042 | ||
eea6121a AM |
1043 | if (size + mmix_elf_section_data (isec)->pjs.stub_offset |
1044 | > isec->size) | |
f60ebe14 HPN |
1045 | abort (); |
1046 | ||
1047 | return r; | |
1048 | } | |
1049 | else | |
1050 | { | |
1051 | /* Put a "GO $255,0" after the common sequence. */ | |
1052 | bfd_put_32 (abfd, | |
1053 | ((GO_INSN_BYTE | IMM_OFFSET_BIT) << 24) | |
1054 | | 0xff00, (bfd_byte *) stubcontents + 16); | |
1055 | ||
1056 | /* Prepare for the general code to set the first part of the | |
1057 | linker stub, and */ | |
1058 | value += addr; | |
1059 | datap = stubcontents; | |
1060 | mmix_elf_section_data (isec)->pjs.stub_offset | |
1061 | += MAX_PUSHJ_STUB_SIZE; | |
1062 | } | |
1063 | } | |
1064 | break; | |
1065 | ||
3c3bdf30 NC |
1066 | case R_MMIX_PUSHJ: |
1067 | { | |
1068 | int inreg = bfd_get_8 (abfd, (bfd_byte *) datap + 1); | |
1069 | ||
1070 | /* Put a "PUSHGO $N,$255,0" after the common sequence. */ | |
1071 | bfd_put_32 (abfd, | |
1072 | ((PUSHGO_INSN_BYTE | IMM_OFFSET_BIT) << 24) | |
1073 | | (inreg << 16) | |
1074 | | 0xff00, | |
1075 | (bfd_byte *) datap + 16); | |
1076 | ||
1077 | /* We change to an absolute value. */ | |
1078 | value += addr; | |
1079 | } | |
1080 | break; | |
1081 | ||
1082 | case R_MMIX_JMP: | |
1083 | /* This one is a little special. If we get here on a non-relaxing | |
1084 | link, and the destination is actually in range, we don't need to | |
1085 | execute the nops. | |
1086 | If so, we fall through to the bit-fiddling relocs. | |
1087 | ||
1088 | FIXME: bfd_check_overflow seems broken; the relocation is | |
1089 | rightshifted before testing, so supply a zero rightshift. */ | |
1090 | ||
1091 | if (! ((value & 3) == 0 | |
1092 | && (r = bfd_check_overflow (complain_overflow_signed, | |
1093 | howto->bitsize, | |
1094 | 0, | |
1095 | bfd_arch_bits_per_address (abfd), | |
1096 | value)) == bfd_reloc_ok)) | |
1097 | { | |
1098 | /* If the relocation doesn't fit in a JMP, we let the NOP:s be | |
1099 | modified below, and put a "GO $255,$255,0" after the | |
1100 | address-loading sequence. */ | |
1101 | bfd_put_32 (abfd, | |
1102 | ((GO_INSN_BYTE | IMM_OFFSET_BIT) << 24) | |
1103 | | 0xffff00, | |
1104 | (bfd_byte *) datap + 16); | |
1105 | ||
1106 | /* We change to an absolute value. */ | |
1107 | value += addr; | |
1108 | break; | |
1109 | } | |
cedb70c5 | 1110 | /* FALLTHROUGH. */ |
3c3bdf30 NC |
1111 | case R_MMIX_ADDR19: |
1112 | case R_MMIX_ADDR27: | |
f60ebe14 | 1113 | pcrel_mmix_reloc_fits: |
3c3bdf30 NC |
1114 | /* These must be in range, or else we emit an error. */ |
1115 | if ((value & 3) == 0 | |
1116 | /* Note rightshift 0; see above. */ | |
1117 | && (r = bfd_check_overflow (complain_overflow_signed, | |
1118 | howto->bitsize, | |
1119 | 0, | |
1120 | bfd_arch_bits_per_address (abfd), | |
1121 | value)) == bfd_reloc_ok) | |
1122 | { | |
1123 | bfd_vma in1 | |
1124 | = bfd_get_32 (abfd, (bfd_byte *) datap); | |
1125 | bfd_vma highbit; | |
1126 | ||
1127 | if ((bfd_signed_vma) value < 0) | |
1128 | { | |
f60ebe14 | 1129 | highbit = 1 << 24; |
3c3bdf30 NC |
1130 | value += (1 << (howto->bitsize - 1)); |
1131 | } | |
1132 | else | |
1133 | highbit = 0; | |
1134 | ||
1135 | value >>= 2; | |
1136 | ||
1137 | bfd_put_32 (abfd, | |
930b4cb2 | 1138 | (in1 & howto->src_mask) |
3c3bdf30 NC |
1139 | | highbit |
1140 | | (value & howto->dst_mask), | |
1141 | (bfd_byte *) datap); | |
1142 | ||
1143 | return bfd_reloc_ok; | |
1144 | } | |
1145 | else | |
1146 | return bfd_reloc_overflow; | |
1147 | ||
930b4cb2 HPN |
1148 | case R_MMIX_BASE_PLUS_OFFSET: |
1149 | { | |
1150 | struct bpo_reloc_section_info *bpodata | |
f0abc2a1 | 1151 | = mmix_elf_section_data (isec)->bpo.reloc; |
18978b27 HPN |
1152 | asection *bpo_greg_section; |
1153 | struct bpo_greg_section_info *gregdata; | |
1154 | size_t bpo_index; | |
1155 | ||
1156 | if (bpodata == NULL) | |
1157 | { | |
1158 | /* This shouldn't happen when linking to ELF or mmo, so | |
1159 | this is an attempt to link to "binary", right? We | |
1160 | can't access the output bfd, so we can't verify that | |
1161 | assumption. We only know that the critical | |
1162 | mmix_elf_check_common_relocs has not been called, which | |
1163 | happens when the output format is different from the | |
1164 | input format (and is not mmo). */ | |
1165 | if (! mmix_elf_section_data (isec)->has_warned_bpo) | |
1166 | { | |
1167 | /* For the first such error per input section, produce | |
1168 | a verbose message. */ | |
1169 | *error_message | |
1170 | = _("invalid input relocation when producing" | |
1171 | " non-ELF, non-mmo format output." | |
1172 | "\n Please use the objcopy program to convert from" | |
1173 | " ELF or mmo," | |
1174 | "\n or compile using the gcc-option" | |
1175 | " \"-mno-base-addresses\"."); | |
1176 | mmix_elf_section_data (isec)->has_warned_bpo = TRUE; | |
1177 | return bfd_reloc_dangerous; | |
1178 | } | |
1179 | ||
1180 | /* For subsequent errors, return this one, which is | |
1181 | rate-limited but looks a little bit different, | |
1182 | hopefully without affecting user-friendliness. */ | |
1183 | return bfd_reloc_overflow; | |
1184 | } | |
1185 | ||
1186 | bpo_greg_section = bpodata->bpo_greg_section; | |
1187 | gregdata = mmix_elf_section_data (bpo_greg_section)->bpo.greg; | |
1188 | bpo_index = gregdata->bpo_reloc_indexes[bpodata->bpo_index++]; | |
930b4cb2 HPN |
1189 | |
1190 | /* A consistency check: The value we now have in "relocation" must | |
1191 | be the same as the value we stored for that relocation. It | |
1192 | doesn't cost much, so can be left in at all times. */ | |
1193 | if (value != gregdata->reloc_request[bpo_index].value) | |
1194 | { | |
1195 | (*_bfd_error_handler) | |
1196 | (_("%s: Internal inconsistency error for value for\n\ | |
1197 | linker-allocated global register: linked: 0x%lx%08lx != relaxed: 0x%lx%08lx\n"), | |
1198 | bfd_get_filename (isec->owner), | |
1199 | (unsigned long) (value >> 32), (unsigned long) value, | |
1200 | (unsigned long) (gregdata->reloc_request[bpo_index].value | |
1201 | >> 32), | |
1202 | (unsigned long) gregdata->reloc_request[bpo_index].value); | |
1203 | bfd_set_error (bfd_error_bad_value); | |
1204 | return bfd_reloc_overflow; | |
1205 | } | |
1206 | ||
1207 | /* Then store the register number and offset for that register | |
1208 | into datap and datap + 1 respectively. */ | |
1209 | bfd_put_8 (abfd, | |
1210 | gregdata->reloc_request[bpo_index].regindex | |
1211 | + bpo_greg_section->output_section->vma / 8, | |
1212 | datap); | |
1213 | bfd_put_8 (abfd, | |
1214 | gregdata->reloc_request[bpo_index].offset, | |
1215 | ((unsigned char *) datap) + 1); | |
1216 | return bfd_reloc_ok; | |
1217 | } | |
1218 | ||
3c3bdf30 NC |
1219 | case R_MMIX_REG_OR_BYTE: |
1220 | case R_MMIX_REG: | |
1221 | if (value > 255) | |
1222 | return bfd_reloc_overflow; | |
1223 | bfd_put_8 (abfd, value, datap); | |
1224 | return bfd_reloc_ok; | |
1225 | ||
1226 | default: | |
1227 | BAD_CASE (howto->type); | |
1228 | } | |
1229 | ||
1230 | /* This code adds the common SETL/INCML/INCMH/INCH worst-case | |
1231 | sequence. */ | |
1232 | ||
1233 | /* Lowest two bits must be 0. We return bfd_reloc_overflow for | |
1234 | everything that looks strange. */ | |
1235 | if (value & 3) | |
1236 | flag = bfd_reloc_overflow; | |
1237 | ||
1238 | bfd_put_32 (abfd, | |
1239 | (SETL_INSN_BYTE << 24) | (value & 0xffff) | (reg << 16), | |
1240 | (bfd_byte *) datap + offs); | |
1241 | bfd_put_32 (abfd, | |
1242 | (INCML_INSN_BYTE << 24) | ((value >> 16) & 0xffff) | (reg << 16), | |
1243 | (bfd_byte *) datap + offs + 4); | |
1244 | bfd_put_32 (abfd, | |
1245 | (INCMH_INSN_BYTE << 24) | ((value >> 32) & 0xffff) | (reg << 16), | |
1246 | (bfd_byte *) datap + offs + 8); | |
1247 | bfd_put_32 (abfd, | |
1248 | (INCH_INSN_BYTE << 24) | ((value >> 48) & 0xffff) | (reg << 16), | |
1249 | (bfd_byte *) datap + offs + 12); | |
1250 | ||
1251 | return flag; | |
1252 | } | |
1253 | ||
1254 | /* Set the howto pointer for an MMIX ELF reloc (type RELA). */ | |
1255 | ||
1256 | static void | |
2c3fc389 NC |
1257 | mmix_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED, |
1258 | arelent *cache_ptr, | |
1259 | Elf_Internal_Rela *dst) | |
3c3bdf30 NC |
1260 | { |
1261 | unsigned int r_type; | |
1262 | ||
1263 | r_type = ELF64_R_TYPE (dst->r_info); | |
1264 | BFD_ASSERT (r_type < (unsigned int) R_MMIX_max); | |
1265 | cache_ptr->howto = &elf_mmix_howto_table[r_type]; | |
1266 | } | |
1267 | ||
1268 | /* Any MMIX-specific relocation gets here at assembly time or when linking | |
1269 | to other formats (such as mmo); this is the relocation function from | |
1270 | the reloc_table. We don't get here for final pure ELF linking. */ | |
1271 | ||
1272 | static bfd_reloc_status_type | |
2c3fc389 NC |
1273 | mmix_elf_reloc (bfd *abfd, |
1274 | arelent *reloc_entry, | |
1275 | asymbol *symbol, | |
1276 | void * data, | |
1277 | asection *input_section, | |
1278 | bfd *output_bfd, | |
1279 | char **error_message) | |
3c3bdf30 NC |
1280 | { |
1281 | bfd_vma relocation; | |
1282 | bfd_reloc_status_type r; | |
1283 | asection *reloc_target_output_section; | |
1284 | bfd_reloc_status_type flag = bfd_reloc_ok; | |
1285 | bfd_vma output_base = 0; | |
3c3bdf30 NC |
1286 | |
1287 | r = bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, | |
1288 | input_section, output_bfd, error_message); | |
1289 | ||
1290 | /* If that was all that was needed (i.e. this isn't a final link, only | |
1291 | some segment adjustments), we're done. */ | |
1292 | if (r != bfd_reloc_continue) | |
1293 | return r; | |
1294 | ||
1295 | if (bfd_is_und_section (symbol->section) | |
1296 | && (symbol->flags & BSF_WEAK) == 0 | |
1297 | && output_bfd == (bfd *) NULL) | |
1298 | return bfd_reloc_undefined; | |
1299 | ||
1300 | /* Is the address of the relocation really within the section? */ | |
07515404 | 1301 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
3c3bdf30 NC |
1302 | return bfd_reloc_outofrange; |
1303 | ||
4cc11e76 | 1304 | /* Work out which section the relocation is targeted at and the |
3c3bdf30 NC |
1305 | initial relocation command value. */ |
1306 | ||
1307 | /* Get symbol value. (Common symbols are special.) */ | |
1308 | if (bfd_is_com_section (symbol->section)) | |
1309 | relocation = 0; | |
1310 | else | |
1311 | relocation = symbol->value; | |
1312 | ||
1313 | reloc_target_output_section = bfd_get_output_section (symbol); | |
1314 | ||
1315 | /* Here the variable relocation holds the final address of the symbol we | |
1316 | are relocating against, plus any addend. */ | |
1317 | if (output_bfd) | |
1318 | output_base = 0; | |
1319 | else | |
1320 | output_base = reloc_target_output_section->vma; | |
1321 | ||
1322 | relocation += output_base + symbol->section->output_offset; | |
1323 | ||
3c3bdf30 NC |
1324 | if (output_bfd != (bfd *) NULL) |
1325 | { | |
1326 | /* Add in supplied addend. */ | |
1327 | relocation += reloc_entry->addend; | |
1328 | ||
1329 | /* This is a partial relocation, and we want to apply the | |
1330 | relocation to the reloc entry rather than the raw data. | |
1331 | Modify the reloc inplace to reflect what we now know. */ | |
1332 | reloc_entry->addend = relocation; | |
1333 | reloc_entry->address += input_section->output_offset; | |
1334 | return flag; | |
1335 | } | |
1336 | ||
1337 | return mmix_final_link_relocate (reloc_entry->howto, input_section, | |
1338 | data, reloc_entry->address, | |
1339 | reloc_entry->addend, relocation, | |
1340 | bfd_asymbol_name (symbol), | |
18978b27 HPN |
1341 | reloc_target_output_section, |
1342 | error_message); | |
3c3bdf30 | 1343 | } |
e06fcc86 | 1344 | \f |
3c3bdf30 NC |
1345 | /* Relocate an MMIX ELF section. Modified from elf32-fr30.c; look to it |
1346 | for guidance if you're thinking of copying this. */ | |
1347 | ||
b34976b6 | 1348 | static bfd_boolean |
2c3fc389 NC |
1349 | mmix_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED, |
1350 | struct bfd_link_info *info, | |
1351 | bfd *input_bfd, | |
1352 | asection *input_section, | |
1353 | bfd_byte *contents, | |
1354 | Elf_Internal_Rela *relocs, | |
1355 | Elf_Internal_Sym *local_syms, | |
1356 | asection **local_sections) | |
3c3bdf30 NC |
1357 | { |
1358 | Elf_Internal_Shdr *symtab_hdr; | |
1359 | struct elf_link_hash_entry **sym_hashes; | |
1360 | Elf_Internal_Rela *rel; | |
1361 | Elf_Internal_Rela *relend; | |
1a23a9e6 | 1362 | bfd_size_type size; |
f60ebe14 | 1363 | size_t pjsno = 0; |
3c3bdf30 | 1364 | |
1a23a9e6 | 1365 | size = input_section->rawsize ? input_section->rawsize : input_section->size; |
3c3bdf30 NC |
1366 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
1367 | sym_hashes = elf_sym_hashes (input_bfd); | |
1368 | relend = relocs + input_section->reloc_count; | |
1369 | ||
1a23a9e6 AM |
1370 | /* Zero the stub area before we start. */ |
1371 | if (input_section->rawsize != 0 | |
1372 | && input_section->size > input_section->rawsize) | |
1373 | memset (contents + input_section->rawsize, 0, | |
1374 | input_section->size - input_section->rawsize); | |
1375 | ||
3c3bdf30 NC |
1376 | for (rel = relocs; rel < relend; rel ++) |
1377 | { | |
1378 | reloc_howto_type *howto; | |
1379 | unsigned long r_symndx; | |
1380 | Elf_Internal_Sym *sym; | |
1381 | asection *sec; | |
1382 | struct elf_link_hash_entry *h; | |
1383 | bfd_vma relocation; | |
1384 | bfd_reloc_status_type r; | |
1385 | const char *name = NULL; | |
1386 | int r_type; | |
b34976b6 | 1387 | bfd_boolean undefined_signalled = FALSE; |
3c3bdf30 NC |
1388 | |
1389 | r_type = ELF64_R_TYPE (rel->r_info); | |
1390 | ||
1391 | if (r_type == R_MMIX_GNU_VTINHERIT | |
1392 | || r_type == R_MMIX_GNU_VTENTRY) | |
1393 | continue; | |
1394 | ||
1395 | r_symndx = ELF64_R_SYM (rel->r_info); | |
1396 | ||
ab96bf03 AM |
1397 | howto = elf_mmix_howto_table + ELF64_R_TYPE (rel->r_info); |
1398 | h = NULL; | |
1399 | sym = NULL; | |
1400 | sec = NULL; | |
1401 | ||
1402 | if (r_symndx < symtab_hdr->sh_info) | |
1403 | { | |
1404 | sym = local_syms + r_symndx; | |
1405 | sec = local_sections [r_symndx]; | |
1406 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); | |
1407 | ||
1408 | name = bfd_elf_string_from_elf_section (input_bfd, | |
1409 | symtab_hdr->sh_link, | |
1410 | sym->st_name); | |
1411 | if (name == NULL) | |
1412 | name = bfd_section_name (input_bfd, sec); | |
1413 | } | |
1414 | else | |
1415 | { | |
1416 | bfd_boolean unresolved_reloc; | |
1417 | ||
1418 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, | |
1419 | r_symndx, symtab_hdr, sym_hashes, | |
1420 | h, sec, relocation, | |
1421 | unresolved_reloc, undefined_signalled); | |
1422 | name = h->root.root.string; | |
1423 | } | |
1424 | ||
dbaa2011 | 1425 | if (sec != NULL && discarded_section (sec)) |
e4067dbb | 1426 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
545fd46b | 1427 | rel, 1, relend, howto, 0, contents); |
ab96bf03 | 1428 | |
1049f94e | 1429 | if (info->relocatable) |
3c3bdf30 | 1430 | { |
f60ebe14 HPN |
1431 | /* This is a relocatable link. For most relocs we don't have to |
1432 | change anything, unless the reloc is against a section | |
1433 | symbol, in which case we have to adjust according to where | |
1434 | the section symbol winds up in the output section. */ | |
ab96bf03 AM |
1435 | if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
1436 | rel->r_addend += sec->output_offset; | |
3c3bdf30 | 1437 | |
f60ebe14 HPN |
1438 | /* For PUSHJ stub relocs however, we may need to change the |
1439 | reloc and the section contents, if the reloc doesn't reach | |
1440 | beyond the end of the output section and previous stubs. | |
1441 | Then we change the section contents to be a PUSHJ to the end | |
1442 | of the input section plus stubs (we can do that without using | |
1443 | a reloc), and then we change the reloc to be a R_MMIX_PUSHJ | |
1444 | at the stub location. */ | |
1445 | if (r_type == R_MMIX_PUSHJ_STUBBABLE) | |
1446 | { | |
1447 | /* We've already checked whether we need a stub; use that | |
1448 | knowledge. */ | |
1449 | if (mmix_elf_section_data (input_section)->pjs.stub_size[pjsno] | |
1450 | != 0) | |
1451 | { | |
1452 | Elf_Internal_Rela relcpy; | |
1453 | ||
1454 | if (mmix_elf_section_data (input_section) | |
1455 | ->pjs.stub_size[pjsno] != MAX_PUSHJ_STUB_SIZE) | |
1456 | abort (); | |
1457 | ||
1458 | /* There's already a PUSHJ insn there, so just fill in | |
1459 | the offset bits to the stub. */ | |
1460 | if (mmix_final_link_relocate (elf_mmix_howto_table | |
1461 | + R_MMIX_ADDR19, | |
1462 | input_section, | |
1463 | contents, | |
1464 | rel->r_offset, | |
1465 | 0, | |
1466 | input_section | |
1467 | ->output_section->vma | |
1468 | + input_section->output_offset | |
eea6121a | 1469 | + size |
f60ebe14 HPN |
1470 | + mmix_elf_section_data (input_section) |
1471 | ->pjs.stub_offset, | |
18978b27 | 1472 | NULL, NULL, NULL) != bfd_reloc_ok) |
f60ebe14 HPN |
1473 | return FALSE; |
1474 | ||
1475 | /* Put a JMP insn at the stub; it goes with the | |
1476 | R_MMIX_JMP reloc. */ | |
1477 | bfd_put_32 (output_bfd, JMP_INSN_BYTE << 24, | |
1478 | contents | |
eea6121a | 1479 | + size |
f60ebe14 HPN |
1480 | + mmix_elf_section_data (input_section) |
1481 | ->pjs.stub_offset); | |
1482 | ||
1483 | /* Change the reloc to be at the stub, and to a full | |
1484 | R_MMIX_JMP reloc. */ | |
1485 | rel->r_info = ELF64_R_INFO (r_symndx, R_MMIX_JMP); | |
1486 | rel->r_offset | |
eea6121a | 1487 | = (size |
f60ebe14 HPN |
1488 | + mmix_elf_section_data (input_section) |
1489 | ->pjs.stub_offset); | |
1490 | ||
1491 | mmix_elf_section_data (input_section)->pjs.stub_offset | |
1492 | += MAX_PUSHJ_STUB_SIZE; | |
1493 | ||
1494 | /* Shift this reloc to the end of the relocs to maintain | |
1495 | the r_offset sorted reloc order. */ | |
1496 | relcpy = *rel; | |
1497 | memmove (rel, rel + 1, (char *) relend - (char *) rel); | |
1498 | relend[-1] = relcpy; | |
1499 | ||
1500 | /* Back up one reloc, or else we'd skip the next reloc | |
1501 | in turn. */ | |
1502 | rel--; | |
1503 | } | |
1504 | ||
1505 | pjsno++; | |
1506 | } | |
3c3bdf30 NC |
1507 | continue; |
1508 | } | |
1509 | ||
3c3bdf30 NC |
1510 | r = mmix_final_link_relocate (howto, input_section, |
1511 | contents, rel->r_offset, | |
18978b27 | 1512 | rel->r_addend, relocation, name, sec, NULL); |
3c3bdf30 NC |
1513 | |
1514 | if (r != bfd_reloc_ok) | |
1515 | { | |
b34976b6 | 1516 | bfd_boolean check_ok = TRUE; |
3c3bdf30 NC |
1517 | const char * msg = (const char *) NULL; |
1518 | ||
1519 | switch (r) | |
1520 | { | |
1521 | case bfd_reloc_overflow: | |
1522 | check_ok = info->callbacks->reloc_overflow | |
dfeffb9f L |
1523 | (info, (h ? &h->root : NULL), name, howto->name, |
1524 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
3c3bdf30 NC |
1525 | break; |
1526 | ||
1527 | case bfd_reloc_undefined: | |
1528 | /* We may have sent this message above. */ | |
1529 | if (! undefined_signalled) | |
1530 | check_ok = info->callbacks->undefined_symbol | |
1531 | (info, name, input_bfd, input_section, rel->r_offset, | |
b34976b6 AM |
1532 | TRUE); |
1533 | undefined_signalled = TRUE; | |
3c3bdf30 NC |
1534 | break; |
1535 | ||
1536 | case bfd_reloc_outofrange: | |
1537 | msg = _("internal error: out of range error"); | |
1538 | break; | |
1539 | ||
1540 | case bfd_reloc_notsupported: | |
1541 | msg = _("internal error: unsupported relocation error"); | |
1542 | break; | |
1543 | ||
1544 | case bfd_reloc_dangerous: | |
1545 | msg = _("internal error: dangerous relocation"); | |
1546 | break; | |
1547 | ||
1548 | default: | |
1549 | msg = _("internal error: unknown error"); | |
1550 | break; | |
1551 | } | |
1552 | ||
1553 | if (msg) | |
1554 | check_ok = info->callbacks->warning | |
1555 | (info, msg, name, input_bfd, input_section, rel->r_offset); | |
1556 | ||
1557 | if (! check_ok) | |
b34976b6 | 1558 | return FALSE; |
3c3bdf30 NC |
1559 | } |
1560 | } | |
1561 | ||
b34976b6 | 1562 | return TRUE; |
3c3bdf30 | 1563 | } |
e06fcc86 | 1564 | \f |
3c3bdf30 NC |
1565 | /* Perform a single relocation. By default we use the standard BFD |
1566 | routines. A few relocs we have to do ourselves. */ | |
1567 | ||
1568 | static bfd_reloc_status_type | |
18978b27 HPN |
1569 | mmix_final_link_relocate (reloc_howto_type *howto, asection *input_section, |
1570 | bfd_byte *contents, bfd_vma r_offset, | |
1571 | bfd_signed_vma r_addend, bfd_vma relocation, | |
1572 | const char *symname, asection *symsec, | |
1573 | char **error_message) | |
3c3bdf30 NC |
1574 | { |
1575 | bfd_reloc_status_type r = bfd_reloc_ok; | |
1576 | bfd_vma addr | |
1577 | = (input_section->output_section->vma | |
1578 | + input_section->output_offset | |
1579 | + r_offset); | |
1580 | bfd_signed_vma srel | |
1581 | = (bfd_signed_vma) relocation + r_addend; | |
1582 | ||
1583 | switch (howto->type) | |
1584 | { | |
1585 | /* All these are PC-relative. */ | |
f60ebe14 | 1586 | case R_MMIX_PUSHJ_STUBBABLE: |
3c3bdf30 NC |
1587 | case R_MMIX_PUSHJ: |
1588 | case R_MMIX_CBRANCH: | |
1589 | case R_MMIX_ADDR19: | |
1590 | case R_MMIX_GETA: | |
1591 | case R_MMIX_ADDR27: | |
1592 | case R_MMIX_JMP: | |
1593 | contents += r_offset; | |
1594 | ||
1595 | srel -= (input_section->output_section->vma | |
1596 | + input_section->output_offset | |
1597 | + r_offset); | |
1598 | ||
1599 | r = mmix_elf_perform_relocation (input_section, howto, contents, | |
18978b27 | 1600 | addr, srel, error_message); |
3c3bdf30 NC |
1601 | break; |
1602 | ||
930b4cb2 HPN |
1603 | case R_MMIX_BASE_PLUS_OFFSET: |
1604 | if (symsec == NULL) | |
1605 | return bfd_reloc_undefined; | |
1606 | ||
1607 | /* Check that we're not relocating against a register symbol. */ | |
1608 | if (strcmp (bfd_get_section_name (symsec->owner, symsec), | |
1609 | MMIX_REG_CONTENTS_SECTION_NAME) == 0 | |
1610 | || strcmp (bfd_get_section_name (symsec->owner, symsec), | |
1611 | MMIX_REG_SECTION_NAME) == 0) | |
1612 | { | |
1613 | /* Note: This is separated out into two messages in order | |
1614 | to ease the translation into other languages. */ | |
1615 | if (symname == NULL || *symname == 0) | |
1616 | (*_bfd_error_handler) | |
1617 | (_("%s: base-plus-offset relocation against register symbol: (unknown) in %s"), | |
1618 | bfd_get_filename (input_section->owner), | |
1619 | bfd_get_section_name (symsec->owner, symsec)); | |
1620 | else | |
1621 | (*_bfd_error_handler) | |
1622 | (_("%s: base-plus-offset relocation against register symbol: %s in %s"), | |
1623 | bfd_get_filename (input_section->owner), symname, | |
1624 | bfd_get_section_name (symsec->owner, symsec)); | |
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) | |
1665 | (*_bfd_error_handler) | |
1666 | (_("%s: register relocation against non-register symbol: (unknown) in %s"), | |
1667 | bfd_get_filename (input_section->owner), | |
1668 | bfd_get_section_name (symsec->owner, symsec)); | |
1669 | else | |
1670 | (*_bfd_error_handler) | |
1671 | (_("%s: register relocation against non-register symbol: %s in %s"), | |
1672 | bfd_get_filename (input_section->owner), symname, | |
1673 | bfd_get_section_name (symsec->owner, symsec)); | |
3c3bdf30 NC |
1674 | |
1675 | /* The bfd_reloc_outofrange return value, though intuitively a | |
1676 | better value, will not get us an error. */ | |
1677 | return bfd_reloc_overflow; | |
1678 | } | |
930b4cb2 | 1679 | do_mmix_reloc: |
3c3bdf30 NC |
1680 | contents += r_offset; |
1681 | r = mmix_elf_perform_relocation (input_section, howto, contents, | |
18978b27 | 1682 | addr, srel, error_message); |
3c3bdf30 NC |
1683 | break; |
1684 | ||
1685 | case R_MMIX_LOCAL: | |
1686 | /* This isn't a real relocation, it's just an assertion that the | |
1687 | final relocation value corresponds to a local register. We | |
1688 | ignore the actual relocation; nothing is changed. */ | |
1689 | { | |
1690 | asection *regsec | |
1691 | = bfd_get_section_by_name (input_section->output_section->owner, | |
1692 | MMIX_REG_CONTENTS_SECTION_NAME); | |
1693 | bfd_vma first_global; | |
1694 | ||
1695 | /* Check that this is an absolute value, or a reference to the | |
1696 | register contents section or the register (symbol) section. | |
1697 | Absolute numbers can get here as undefined section. Undefined | |
1698 | symbols are signalled elsewhere, so there's no conflict in us | |
1699 | accidentally handling it. */ | |
1700 | if (!bfd_is_abs_section (symsec) | |
1701 | && !bfd_is_und_section (symsec) | |
1702 | && strcmp (bfd_get_section_name (symsec->owner, symsec), | |
1703 | MMIX_REG_CONTENTS_SECTION_NAME) != 0 | |
1704 | && strcmp (bfd_get_section_name (symsec->owner, symsec), | |
1705 | MMIX_REG_SECTION_NAME) != 0) | |
1706 | { | |
1707 | (*_bfd_error_handler) | |
1708 | (_("%s: directive LOCAL valid only with a register or absolute value"), | |
1709 | bfd_get_filename (input_section->owner)); | |
1710 | ||
1711 | return bfd_reloc_overflow; | |
1712 | } | |
1713 | ||
1714 | /* If we don't have a register contents section, then $255 is the | |
1715 | first global register. */ | |
1716 | if (regsec == NULL) | |
1717 | first_global = 255; | |
1718 | else | |
1719 | { | |
a0f49396 NC |
1720 | first_global |
1721 | = bfd_get_section_vma (input_section->output_section->owner, | |
1722 | regsec) / 8; | |
3c3bdf30 NC |
1723 | if (strcmp (bfd_get_section_name (symsec->owner, symsec), |
1724 | MMIX_REG_CONTENTS_SECTION_NAME) == 0) | |
1725 | { | |
1726 | if ((srel & 7) != 0 || srel < 32*8 || srel > 255*8) | |
1727 | /* The bfd_reloc_outofrange return value, though | |
1728 | intuitively a better value, will not get us an error. */ | |
1729 | return bfd_reloc_overflow; | |
1730 | srel /= 8; | |
1731 | } | |
1732 | } | |
1733 | ||
1734 | if ((bfd_vma) srel >= first_global) | |
1735 | { | |
1736 | /* FIXME: Better error message. */ | |
1737 | (*_bfd_error_handler) | |
1738 | (_("%s: LOCAL directive: Register $%ld is not a local register. First global register is $%ld."), | |
1739 | bfd_get_filename (input_section->owner), (long) srel, (long) first_global); | |
1740 | ||
1741 | return bfd_reloc_overflow; | |
1742 | } | |
1743 | } | |
1744 | r = bfd_reloc_ok; | |
1745 | break; | |
1746 | ||
1747 | default: | |
1748 | r = _bfd_final_link_relocate (howto, input_section->owner, input_section, | |
1749 | contents, r_offset, | |
1750 | relocation, r_addend); | |
1751 | } | |
1752 | ||
1753 | return r; | |
1754 | } | |
e06fcc86 | 1755 | \f |
3c3bdf30 NC |
1756 | /* Return the section that should be marked against GC for a given |
1757 | relocation. */ | |
1758 | ||
1759 | static asection * | |
07adf181 AM |
1760 | mmix_elf_gc_mark_hook (asection *sec, |
1761 | struct bfd_link_info *info, | |
1762 | Elf_Internal_Rela *rel, | |
1763 | struct elf_link_hash_entry *h, | |
1764 | Elf_Internal_Sym *sym) | |
3c3bdf30 NC |
1765 | { |
1766 | if (h != NULL) | |
07adf181 AM |
1767 | switch (ELF64_R_TYPE (rel->r_info)) |
1768 | { | |
1769 | case R_MMIX_GNU_VTINHERIT: | |
1770 | case R_MMIX_GNU_VTENTRY: | |
1771 | return NULL; | |
1772 | } | |
3c3bdf30 | 1773 | |
07adf181 | 1774 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
3c3bdf30 | 1775 | } |
930b4cb2 HPN |
1776 | |
1777 | /* Update relocation info for a GC-excluded section. We could supposedly | |
1778 | perform the allocation after GC, but there's no suitable hook between | |
1779 | GC (or section merge) and the point when all input sections must be | |
1780 | present. Better to waste some memory and (perhaps) a little time. */ | |
1781 | ||
b34976b6 | 1782 | static bfd_boolean |
07adf181 AM |
1783 | mmix_elf_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED, |
1784 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
1785 | asection *sec, | |
1786 | const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED) | |
930b4cb2 HPN |
1787 | { |
1788 | struct bpo_reloc_section_info *bpodata | |
f0abc2a1 | 1789 | = mmix_elf_section_data (sec)->bpo.reloc; |
930b4cb2 HPN |
1790 | asection *allocated_gregs_section; |
1791 | ||
1792 | /* If no bpodata here, we have nothing to do. */ | |
1793 | if (bpodata == NULL) | |
b34976b6 | 1794 | return TRUE; |
930b4cb2 HPN |
1795 | |
1796 | allocated_gregs_section = bpodata->bpo_greg_section; | |
1797 | ||
f0abc2a1 | 1798 | mmix_elf_section_data (allocated_gregs_section)->bpo.greg->n_bpo_relocs |
930b4cb2 HPN |
1799 | -= bpodata->n_bpo_relocs_this_section; |
1800 | ||
b34976b6 | 1801 | return TRUE; |
930b4cb2 | 1802 | } |
e06fcc86 | 1803 | \f |
3c3bdf30 NC |
1804 | /* Sort register relocs to come before expanding relocs. */ |
1805 | ||
1806 | static int | |
2c3fc389 | 1807 | mmix_elf_sort_relocs (const void * p1, const void * p2) |
3c3bdf30 NC |
1808 | { |
1809 | const Elf_Internal_Rela *r1 = (const Elf_Internal_Rela *) p1; | |
1810 | const Elf_Internal_Rela *r2 = (const Elf_Internal_Rela *) p2; | |
1811 | int r1_is_reg, r2_is_reg; | |
1812 | ||
1813 | /* Sort primarily on r_offset & ~3, so relocs are done to consecutive | |
1814 | insns. */ | |
1815 | if ((r1->r_offset & ~(bfd_vma) 3) > (r2->r_offset & ~(bfd_vma) 3)) | |
1816 | return 1; | |
1817 | else if ((r1->r_offset & ~(bfd_vma) 3) < (r2->r_offset & ~(bfd_vma) 3)) | |
1818 | return -1; | |
1819 | ||
1820 | r1_is_reg | |
1821 | = (ELF64_R_TYPE (r1->r_info) == R_MMIX_REG_OR_BYTE | |
1822 | || ELF64_R_TYPE (r1->r_info) == R_MMIX_REG); | |
1823 | r2_is_reg | |
1824 | = (ELF64_R_TYPE (r2->r_info) == R_MMIX_REG_OR_BYTE | |
1825 | || ELF64_R_TYPE (r2->r_info) == R_MMIX_REG); | |
1826 | if (r1_is_reg != r2_is_reg) | |
1827 | return r2_is_reg - r1_is_reg; | |
1828 | ||
1829 | /* Neither or both are register relocs. Then sort on full offset. */ | |
1830 | if (r1->r_offset > r2->r_offset) | |
1831 | return 1; | |
1832 | else if (r1->r_offset < r2->r_offset) | |
1833 | return -1; | |
1834 | return 0; | |
1835 | } | |
1836 | ||
930b4cb2 HPN |
1837 | /* Subset of mmix_elf_check_relocs, common to ELF and mmo linking. */ |
1838 | ||
b34976b6 | 1839 | static bfd_boolean |
2c3fc389 NC |
1840 | mmix_elf_check_common_relocs (bfd *abfd, |
1841 | struct bfd_link_info *info, | |
1842 | asection *sec, | |
1843 | const Elf_Internal_Rela *relocs) | |
930b4cb2 HPN |
1844 | { |
1845 | bfd *bpo_greg_owner = NULL; | |
1846 | asection *allocated_gregs_section = NULL; | |
1847 | struct bpo_greg_section_info *gregdata = NULL; | |
1848 | struct bpo_reloc_section_info *bpodata = NULL; | |
1849 | const Elf_Internal_Rela *rel; | |
1850 | const Elf_Internal_Rela *rel_end; | |
1851 | ||
930b4cb2 HPN |
1852 | /* We currently have to abuse this COFF-specific member, since there's |
1853 | no target-machine-dedicated member. There's no alternative outside | |
1854 | the bfd_link_info struct; we can't specialize a hash-table since | |
1855 | they're different between ELF and mmo. */ | |
1856 | bpo_greg_owner = (bfd *) info->base_file; | |
1857 | ||
1858 | rel_end = relocs + sec->reloc_count; | |
1859 | for (rel = relocs; rel < rel_end; rel++) | |
1860 | { | |
1861 | switch (ELF64_R_TYPE (rel->r_info)) | |
1862 | { | |
1863 | /* This relocation causes a GREG allocation. We need to count | |
1864 | them, and we need to create a section for them, so we need an | |
1865 | object to fake as the owner of that section. We can't use | |
1866 | the ELF dynobj for this, since the ELF bits assume lots of | |
1867 | DSO-related stuff if that member is non-NULL. */ | |
1868 | case R_MMIX_BASE_PLUS_OFFSET: | |
f60ebe14 HPN |
1869 | /* We don't do anything with this reloc for a relocatable link. */ |
1870 | if (info->relocatable) | |
1871 | break; | |
1872 | ||
930b4cb2 HPN |
1873 | if (bpo_greg_owner == NULL) |
1874 | { | |
1875 | bpo_greg_owner = abfd; | |
2c3fc389 | 1876 | info->base_file = bpo_greg_owner; |
930b4cb2 HPN |
1877 | } |
1878 | ||
4fa5c2a8 HPN |
1879 | if (allocated_gregs_section == NULL) |
1880 | allocated_gregs_section | |
1881 | = bfd_get_section_by_name (bpo_greg_owner, | |
1882 | MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME); | |
1883 | ||
930b4cb2 HPN |
1884 | if (allocated_gregs_section == NULL) |
1885 | { | |
1886 | allocated_gregs_section | |
3496cb2a L |
1887 | = bfd_make_section_with_flags (bpo_greg_owner, |
1888 | MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME, | |
1889 | (SEC_HAS_CONTENTS | |
1890 | | SEC_IN_MEMORY | |
1891 | | SEC_LINKER_CREATED)); | |
930b4cb2 HPN |
1892 | /* Setting both SEC_ALLOC and SEC_LOAD means the section is |
1893 | treated like any other section, and we'd get errors for | |
1894 | address overlap with the text section. Let's set none of | |
1895 | those flags, as that is what currently happens for usual | |
1896 | GREG allocations, and that works. */ | |
1897 | if (allocated_gregs_section == NULL | |
930b4cb2 HPN |
1898 | || !bfd_set_section_alignment (bpo_greg_owner, |
1899 | allocated_gregs_section, | |
1900 | 3)) | |
b34976b6 | 1901 | return FALSE; |
930b4cb2 HPN |
1902 | |
1903 | gregdata = (struct bpo_greg_section_info *) | |
1904 | bfd_zalloc (bpo_greg_owner, sizeof (struct bpo_greg_section_info)); | |
1905 | if (gregdata == NULL) | |
b34976b6 | 1906 | return FALSE; |
f0abc2a1 AM |
1907 | mmix_elf_section_data (allocated_gregs_section)->bpo.greg |
1908 | = gregdata; | |
930b4cb2 HPN |
1909 | } |
1910 | else if (gregdata == NULL) | |
f0abc2a1 AM |
1911 | gregdata |
1912 | = mmix_elf_section_data (allocated_gregs_section)->bpo.greg; | |
930b4cb2 HPN |
1913 | |
1914 | /* Get ourselves some auxiliary info for the BPO-relocs. */ | |
1915 | if (bpodata == NULL) | |
1916 | { | |
1917 | /* No use doing a separate iteration pass to find the upper | |
1918 | limit - just use the number of relocs. */ | |
1919 | bpodata = (struct bpo_reloc_section_info *) | |
1920 | bfd_alloc (bpo_greg_owner, | |
1921 | sizeof (struct bpo_reloc_section_info) | |
1922 | * (sec->reloc_count + 1)); | |
1923 | if (bpodata == NULL) | |
b34976b6 | 1924 | return FALSE; |
f0abc2a1 | 1925 | mmix_elf_section_data (sec)->bpo.reloc = bpodata; |
930b4cb2 HPN |
1926 | bpodata->first_base_plus_offset_reloc |
1927 | = bpodata->bpo_index | |
1928 | = gregdata->n_max_bpo_relocs; | |
1929 | bpodata->bpo_greg_section | |
1930 | = allocated_gregs_section; | |
4fa5c2a8 | 1931 | bpodata->n_bpo_relocs_this_section = 0; |
930b4cb2 HPN |
1932 | } |
1933 | ||
1934 | bpodata->n_bpo_relocs_this_section++; | |
1935 | gregdata->n_max_bpo_relocs++; | |
1936 | ||
1937 | /* We don't get another chance to set this before GC; we've not | |
f60ebe14 | 1938 | set up any hook that runs before GC. */ |
930b4cb2 HPN |
1939 | gregdata->n_bpo_relocs |
1940 | = gregdata->n_max_bpo_relocs; | |
1941 | break; | |
f60ebe14 HPN |
1942 | |
1943 | case R_MMIX_PUSHJ_STUBBABLE: | |
1944 | mmix_elf_section_data (sec)->pjs.n_pushj_relocs++; | |
1945 | break; | |
930b4cb2 HPN |
1946 | } |
1947 | } | |
1948 | ||
f60ebe14 HPN |
1949 | /* Allocate per-reloc stub storage and initialize it to the max stub |
1950 | size. */ | |
1951 | if (mmix_elf_section_data (sec)->pjs.n_pushj_relocs != 0) | |
1952 | { | |
1953 | size_t i; | |
1954 | ||
1955 | mmix_elf_section_data (sec)->pjs.stub_size | |
1956 | = bfd_alloc (abfd, mmix_elf_section_data (sec)->pjs.n_pushj_relocs | |
1957 | * sizeof (mmix_elf_section_data (sec) | |
1958 | ->pjs.stub_size[0])); | |
1959 | if (mmix_elf_section_data (sec)->pjs.stub_size == NULL) | |
1960 | return FALSE; | |
1961 | ||
1962 | for (i = 0; i < mmix_elf_section_data (sec)->pjs.n_pushj_relocs; i++) | |
1963 | mmix_elf_section_data (sec)->pjs.stub_size[i] = MAX_PUSHJ_STUB_SIZE; | |
1964 | } | |
1965 | ||
b34976b6 | 1966 | return TRUE; |
930b4cb2 HPN |
1967 | } |
1968 | ||
3c3bdf30 NC |
1969 | /* Look through the relocs for a section during the first phase. */ |
1970 | ||
b34976b6 | 1971 | static bfd_boolean |
2c3fc389 NC |
1972 | mmix_elf_check_relocs (bfd *abfd, |
1973 | struct bfd_link_info *info, | |
1974 | asection *sec, | |
1975 | const Elf_Internal_Rela *relocs) | |
3c3bdf30 NC |
1976 | { |
1977 | Elf_Internal_Shdr *symtab_hdr; | |
5582a088 | 1978 | struct elf_link_hash_entry **sym_hashes; |
3c3bdf30 NC |
1979 | const Elf_Internal_Rela *rel; |
1980 | const Elf_Internal_Rela *rel_end; | |
1981 | ||
3c3bdf30 NC |
1982 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
1983 | sym_hashes = elf_sym_hashes (abfd); | |
3c3bdf30 NC |
1984 | |
1985 | /* First we sort the relocs so that any register relocs come before | |
1986 | expansion-relocs to the same insn. FIXME: Not done for mmo. */ | |
2c3fc389 | 1987 | qsort ((void *) relocs, sec->reloc_count, sizeof (Elf_Internal_Rela), |
3c3bdf30 NC |
1988 | mmix_elf_sort_relocs); |
1989 | ||
930b4cb2 HPN |
1990 | /* Do the common part. */ |
1991 | if (!mmix_elf_check_common_relocs (abfd, info, sec, relocs)) | |
b34976b6 | 1992 | return FALSE; |
930b4cb2 | 1993 | |
f60ebe14 HPN |
1994 | if (info->relocatable) |
1995 | return TRUE; | |
1996 | ||
3c3bdf30 NC |
1997 | rel_end = relocs + sec->reloc_count; |
1998 | for (rel = relocs; rel < rel_end; rel++) | |
1999 | { | |
2000 | struct elf_link_hash_entry *h; | |
2001 | unsigned long r_symndx; | |
2002 | ||
2003 | r_symndx = ELF64_R_SYM (rel->r_info); | |
2004 | if (r_symndx < symtab_hdr->sh_info) | |
2005 | h = NULL; | |
2006 | else | |
973a3492 L |
2007 | { |
2008 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
2009 | while (h->root.type == bfd_link_hash_indirect | |
2010 | || h->root.type == bfd_link_hash_warning) | |
2011 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2012 | } | |
3c3bdf30 NC |
2013 | |
2014 | switch (ELF64_R_TYPE (rel->r_info)) | |
930b4cb2 | 2015 | { |
3c3bdf30 NC |
2016 | /* This relocation describes the C++ object vtable hierarchy. |
2017 | Reconstruct it for later use during GC. */ | |
2018 | case R_MMIX_GNU_VTINHERIT: | |
c152c796 | 2019 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
b34976b6 | 2020 | return FALSE; |
3c3bdf30 NC |
2021 | break; |
2022 | ||
2023 | /* This relocation describes which C++ vtable entries are actually | |
2024 | used. Record for later use during GC. */ | |
2025 | case R_MMIX_GNU_VTENTRY: | |
d17e0c6e JB |
2026 | BFD_ASSERT (h != NULL); |
2027 | if (h != NULL | |
2028 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
b34976b6 | 2029 | return FALSE; |
3c3bdf30 | 2030 | break; |
930b4cb2 HPN |
2031 | } |
2032 | } | |
2033 | ||
b34976b6 | 2034 | return TRUE; |
930b4cb2 HPN |
2035 | } |
2036 | ||
2037 | /* Wrapper for mmix_elf_check_common_relocs, called when linking to mmo. | |
2038 | Copied from elf_link_add_object_symbols. */ | |
2039 | ||
b34976b6 | 2040 | bfd_boolean |
2c3fc389 | 2041 | _bfd_mmix_check_all_relocs (bfd *abfd, struct bfd_link_info *info) |
930b4cb2 HPN |
2042 | { |
2043 | asection *o; | |
2044 | ||
2045 | for (o = abfd->sections; o != NULL; o = o->next) | |
2046 | { | |
2047 | Elf_Internal_Rela *internal_relocs; | |
b34976b6 | 2048 | bfd_boolean ok; |
930b4cb2 HPN |
2049 | |
2050 | if ((o->flags & SEC_RELOC) == 0 | |
2051 | || o->reloc_count == 0 | |
2052 | || ((info->strip == strip_all || info->strip == strip_debugger) | |
2053 | && (o->flags & SEC_DEBUGGING) != 0) | |
2054 | || bfd_is_abs_section (o->output_section)) | |
2055 | continue; | |
2056 | ||
2057 | internal_relocs | |
2c3fc389 | 2058 | = _bfd_elf_link_read_relocs (abfd, o, NULL, |
45d6a902 AM |
2059 | (Elf_Internal_Rela *) NULL, |
2060 | info->keep_memory); | |
930b4cb2 | 2061 | if (internal_relocs == NULL) |
b34976b6 | 2062 | return FALSE; |
930b4cb2 HPN |
2063 | |
2064 | ok = mmix_elf_check_common_relocs (abfd, info, o, internal_relocs); | |
2065 | ||
2066 | if (! info->keep_memory) | |
2067 | free (internal_relocs); | |
2068 | ||
2069 | if (! ok) | |
b34976b6 | 2070 | return FALSE; |
3c3bdf30 NC |
2071 | } |
2072 | ||
b34976b6 | 2073 | return TRUE; |
3c3bdf30 | 2074 | } |
e06fcc86 | 2075 | \f |
3c3bdf30 NC |
2076 | /* Change symbols relative to the reg contents section to instead be to |
2077 | the register section, and scale them down to correspond to the register | |
2078 | number. */ | |
2079 | ||
6e0b88f1 | 2080 | static int |
2c3fc389 NC |
2081 | mmix_elf_link_output_symbol_hook (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
2082 | const char *name ATTRIBUTE_UNUSED, | |
2083 | Elf_Internal_Sym *sym, | |
2084 | asection *input_sec, | |
2085 | struct elf_link_hash_entry *h ATTRIBUTE_UNUSED) | |
3c3bdf30 NC |
2086 | { |
2087 | if (input_sec != NULL | |
2088 | && input_sec->name != NULL | |
2089 | && ELF_ST_TYPE (sym->st_info) != STT_SECTION | |
2090 | && strcmp (input_sec->name, MMIX_REG_CONTENTS_SECTION_NAME) == 0) | |
2091 | { | |
2092 | sym->st_value /= 8; | |
2093 | sym->st_shndx = SHN_REGISTER; | |
2094 | } | |
2095 | ||
6e0b88f1 | 2096 | return 1; |
3c3bdf30 NC |
2097 | } |
2098 | ||
2099 | /* We fake a register section that holds values that are register numbers. | |
2100 | Having a SHN_REGISTER and register section translates better to other | |
2101 | formats (e.g. mmo) than for example a STT_REGISTER attribute. | |
2102 | This section faking is based on a construct in elf32-mips.c. */ | |
2103 | static asection mmix_elf_reg_section; | |
2104 | static asymbol mmix_elf_reg_section_symbol; | |
2105 | static asymbol *mmix_elf_reg_section_symbol_ptr; | |
2106 | ||
f60ebe14 | 2107 | /* Handle the special section numbers that a symbol may use. */ |
3c3bdf30 NC |
2108 | |
2109 | void | |
2110 | mmix_elf_symbol_processing (abfd, asym) | |
2111 | bfd *abfd ATTRIBUTE_UNUSED; | |
2112 | asymbol *asym; | |
2113 | { | |
2114 | elf_symbol_type *elfsym; | |
2115 | ||
2116 | elfsym = (elf_symbol_type *) asym; | |
2117 | switch (elfsym->internal_elf_sym.st_shndx) | |
2118 | { | |
2119 | case SHN_REGISTER: | |
2120 | if (mmix_elf_reg_section.name == NULL) | |
2121 | { | |
2122 | /* Initialize the register section. */ | |
2123 | mmix_elf_reg_section.name = MMIX_REG_SECTION_NAME; | |
2124 | mmix_elf_reg_section.flags = SEC_NO_FLAGS; | |
2125 | mmix_elf_reg_section.output_section = &mmix_elf_reg_section; | |
2126 | mmix_elf_reg_section.symbol = &mmix_elf_reg_section_symbol; | |
2127 | mmix_elf_reg_section.symbol_ptr_ptr = &mmix_elf_reg_section_symbol_ptr; | |
2128 | mmix_elf_reg_section_symbol.name = MMIX_REG_SECTION_NAME; | |
2129 | mmix_elf_reg_section_symbol.flags = BSF_SECTION_SYM; | |
2130 | mmix_elf_reg_section_symbol.section = &mmix_elf_reg_section; | |
2131 | mmix_elf_reg_section_symbol_ptr = &mmix_elf_reg_section_symbol; | |
2132 | } | |
2133 | asym->section = &mmix_elf_reg_section; | |
2134 | break; | |
2135 | ||
2136 | default: | |
2137 | break; | |
2138 | } | |
2139 | } | |
2140 | ||
2141 | /* Given a BFD section, try to locate the corresponding ELF section | |
2142 | index. */ | |
2143 | ||
b34976b6 | 2144 | static bfd_boolean |
2c3fc389 NC |
2145 | mmix_elf_section_from_bfd_section (bfd * abfd ATTRIBUTE_UNUSED, |
2146 | asection * sec, | |
2147 | int * retval) | |
3c3bdf30 NC |
2148 | { |
2149 | if (strcmp (bfd_get_section_name (abfd, sec), MMIX_REG_SECTION_NAME) == 0) | |
2150 | *retval = SHN_REGISTER; | |
2151 | else | |
b34976b6 | 2152 | return FALSE; |
3c3bdf30 | 2153 | |
b34976b6 | 2154 | return TRUE; |
3c3bdf30 NC |
2155 | } |
2156 | ||
2157 | /* Hook called by the linker routine which adds symbols from an object | |
2158 | file. We must handle the special SHN_REGISTER section number here. | |
2159 | ||
2160 | We also check that we only have *one* each of the section-start | |
2161 | symbols, since otherwise having two with the same value would cause | |
2162 | them to be "merged", but with the contents serialized. */ | |
2163 | ||
2c3fc389 NC |
2164 | static bfd_boolean |
2165 | mmix_elf_add_symbol_hook (bfd *abfd, | |
2166 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
2167 | Elf_Internal_Sym *sym, | |
2168 | const char **namep ATTRIBUTE_UNUSED, | |
2169 | flagword *flagsp ATTRIBUTE_UNUSED, | |
2170 | asection **secp, | |
2171 | bfd_vma *valp ATTRIBUTE_UNUSED) | |
3c3bdf30 NC |
2172 | { |
2173 | if (sym->st_shndx == SHN_REGISTER) | |
46fda84e AM |
2174 | { |
2175 | *secp = bfd_make_section_old_way (abfd, MMIX_REG_SECTION_NAME); | |
2176 | (*secp)->flags |= SEC_LINKER_CREATED; | |
2177 | } | |
3c3bdf30 | 2178 | else if ((*namep)[0] == '_' && (*namep)[1] == '_' && (*namep)[2] == '.' |
0112cd26 | 2179 | && CONST_STRNEQ (*namep, MMIX_LOC_SECTION_START_SYMBOL_PREFIX)) |
3c3bdf30 NC |
2180 | { |
2181 | /* See if we have another one. */ | |
4ab82700 AM |
2182 | struct bfd_link_hash_entry *h = bfd_link_hash_lookup (info->hash, |
2183 | *namep, | |
b34976b6 AM |
2184 | FALSE, |
2185 | FALSE, | |
2186 | FALSE); | |
3c3bdf30 | 2187 | |
4ab82700 | 2188 | if (h != NULL && h->type != bfd_link_hash_undefined) |
3c3bdf30 NC |
2189 | { |
2190 | /* How do we get the asymbol (or really: the filename) from h? | |
4ab82700 | 2191 | h->u.def.section->owner is NULL. */ |
3c3bdf30 NC |
2192 | ((*_bfd_error_handler) |
2193 | (_("%s: Error: multiple definition of `%s'; start of %s is set in a earlier linked file\n"), | |
2194 | bfd_get_filename (abfd), *namep, | |
2195 | *namep + strlen (MMIX_LOC_SECTION_START_SYMBOL_PREFIX))); | |
2196 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2197 | return FALSE; |
3c3bdf30 NC |
2198 | } |
2199 | } | |
2200 | ||
b34976b6 | 2201 | return TRUE; |
3c3bdf30 NC |
2202 | } |
2203 | ||
2204 | /* We consider symbols matching "L.*:[0-9]+" to be local symbols. */ | |
2205 | ||
2c3fc389 NC |
2206 | static bfd_boolean |
2207 | mmix_elf_is_local_label_name (bfd *abfd, const char *name) | |
3c3bdf30 NC |
2208 | { |
2209 | const char *colpos; | |
2210 | int digits; | |
2211 | ||
2212 | /* Also include the default local-label definition. */ | |
2213 | if (_bfd_elf_is_local_label_name (abfd, name)) | |
b34976b6 | 2214 | return TRUE; |
3c3bdf30 NC |
2215 | |
2216 | if (*name != 'L') | |
b34976b6 | 2217 | return FALSE; |
3c3bdf30 NC |
2218 | |
2219 | /* If there's no ":", or more than one, it's not a local symbol. */ | |
2220 | colpos = strchr (name, ':'); | |
2221 | if (colpos == NULL || strchr (colpos + 1, ':') != NULL) | |
b34976b6 | 2222 | return FALSE; |
3c3bdf30 NC |
2223 | |
2224 | /* Check that there are remaining characters and that they are digits. */ | |
2225 | if (colpos[1] == 0) | |
b34976b6 | 2226 | return FALSE; |
3c3bdf30 NC |
2227 | |
2228 | digits = strspn (colpos + 1, "0123456789"); | |
2229 | return digits != 0 && colpos[1 + digits] == 0; | |
2230 | } | |
2231 | ||
2232 | /* We get rid of the register section here. */ | |
2233 | ||
b34976b6 | 2234 | bfd_boolean |
2c3fc389 | 2235 | mmix_elf_final_link (bfd *abfd, struct bfd_link_info *info) |
3c3bdf30 NC |
2236 | { |
2237 | /* We never output a register section, though we create one for | |
2238 | temporary measures. Check that nobody entered contents into it. */ | |
2239 | asection *reg_section; | |
3c3bdf30 NC |
2240 | |
2241 | reg_section = bfd_get_section_by_name (abfd, MMIX_REG_SECTION_NAME); | |
2242 | ||
2243 | if (reg_section != NULL) | |
2244 | { | |
2245 | /* FIXME: Pass error state gracefully. */ | |
2246 | if (bfd_get_section_flags (abfd, reg_section) & SEC_HAS_CONTENTS) | |
2247 | _bfd_abort (__FILE__, __LINE__, _("Register section has contents\n")); | |
2248 | ||
46fda84e AM |
2249 | /* Really remove the section, if it hasn't already been done. */ |
2250 | if (!bfd_section_removed_from_list (abfd, reg_section)) | |
2251 | { | |
2252 | bfd_section_list_remove (abfd, reg_section); | |
2253 | --abfd->section_count; | |
2254 | } | |
3c3bdf30 NC |
2255 | } |
2256 | ||
c152c796 | 2257 | if (! bfd_elf_final_link (abfd, info)) |
b34976b6 | 2258 | return FALSE; |
3c3bdf30 | 2259 | |
930b4cb2 HPN |
2260 | /* Since this section is marked SEC_LINKER_CREATED, it isn't output by |
2261 | the regular linker machinery. We do it here, like other targets with | |
2262 | special sections. */ | |
2263 | if (info->base_file != NULL) | |
2264 | { | |
2265 | asection *greg_section | |
2266 | = bfd_get_section_by_name ((bfd *) info->base_file, | |
2267 | MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME); | |
2268 | if (!bfd_set_section_contents (abfd, | |
2269 | greg_section->output_section, | |
2270 | greg_section->contents, | |
2271 | (file_ptr) greg_section->output_offset, | |
eea6121a | 2272 | greg_section->size)) |
b34976b6 | 2273 | return FALSE; |
930b4cb2 | 2274 | } |
b34976b6 | 2275 | return TRUE; |
930b4cb2 HPN |
2276 | } |
2277 | ||
f60ebe14 | 2278 | /* We need to include the maximum size of PUSHJ-stubs in the initial |
eea6121a | 2279 | section size. This is expected to shrink during linker relaxation. */ |
f60ebe14 HPN |
2280 | |
2281 | static void | |
2c3fc389 NC |
2282 | mmix_set_relaxable_size (bfd *abfd ATTRIBUTE_UNUSED, |
2283 | asection *sec, | |
2284 | void *ptr) | |
f60ebe14 HPN |
2285 | { |
2286 | struct bfd_link_info *info = ptr; | |
2287 | ||
2288 | /* Make sure we only do this for section where we know we want this, | |
2289 | otherwise we might end up resetting the size of COMMONs. */ | |
2290 | if (mmix_elf_section_data (sec)->pjs.n_pushj_relocs == 0) | |
2291 | return; | |
2292 | ||
1a23a9e6 | 2293 | sec->rawsize = sec->size; |
eea6121a AM |
2294 | sec->size += (mmix_elf_section_data (sec)->pjs.n_pushj_relocs |
2295 | * MAX_PUSHJ_STUB_SIZE); | |
f60ebe14 HPN |
2296 | |
2297 | /* For use in relocatable link, we start with a max stubs size. See | |
2298 | mmix_elf_relax_section. */ | |
2299 | if (info->relocatable && sec->output_section) | |
2300 | mmix_elf_section_data (sec->output_section)->pjs.stubs_size_sum | |
2301 | += (mmix_elf_section_data (sec)->pjs.n_pushj_relocs | |
2302 | * MAX_PUSHJ_STUB_SIZE); | |
2303 | } | |
2304 | ||
930b4cb2 HPN |
2305 | /* Initialize stuff for the linker-generated GREGs to match |
2306 | R_MMIX_BASE_PLUS_OFFSET relocs seen by the linker. */ | |
2307 | ||
b34976b6 | 2308 | bfd_boolean |
2c3fc389 NC |
2309 | _bfd_mmix_before_linker_allocation (bfd *abfd ATTRIBUTE_UNUSED, |
2310 | struct bfd_link_info *info) | |
930b4cb2 HPN |
2311 | { |
2312 | asection *bpo_gregs_section; | |
2313 | bfd *bpo_greg_owner; | |
2314 | struct bpo_greg_section_info *gregdata; | |
2315 | size_t n_gregs; | |
2316 | bfd_vma gregs_size; | |
2317 | size_t i; | |
2318 | size_t *bpo_reloc_indexes; | |
f60ebe14 HPN |
2319 | bfd *ibfd; |
2320 | ||
2321 | /* Set the initial size of sections. */ | |
2322 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
2323 | bfd_map_over_sections (ibfd, mmix_set_relaxable_size, info); | |
930b4cb2 HPN |
2324 | |
2325 | /* The bpo_greg_owner bfd is supposed to have been set by | |
2326 | mmix_elf_check_relocs when the first R_MMIX_BASE_PLUS_OFFSET is seen. | |
2327 | If there is no such object, there was no R_MMIX_BASE_PLUS_OFFSET. */ | |
2328 | bpo_greg_owner = (bfd *) info->base_file; | |
2329 | if (bpo_greg_owner == NULL) | |
b34976b6 | 2330 | return TRUE; |
930b4cb2 HPN |
2331 | |
2332 | bpo_gregs_section | |
2333 | = bfd_get_section_by_name (bpo_greg_owner, | |
2334 | MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME); | |
2335 | ||
930b4cb2 | 2336 | if (bpo_gregs_section == NULL) |
b34976b6 | 2337 | return TRUE; |
930b4cb2 HPN |
2338 | |
2339 | /* We use the target-data handle in the ELF section data. */ | |
f0abc2a1 | 2340 | gregdata = mmix_elf_section_data (bpo_gregs_section)->bpo.greg; |
930b4cb2 | 2341 | if (gregdata == NULL) |
b34976b6 | 2342 | return FALSE; |
930b4cb2 HPN |
2343 | |
2344 | n_gregs = gregdata->n_bpo_relocs; | |
2345 | gregdata->n_allocated_bpo_gregs = n_gregs; | |
2346 | ||
2347 | /* When this reaches zero during relaxation, all entries have been | |
2348 | filled in and the size of the linker gregs can be calculated. */ | |
2349 | gregdata->n_remaining_bpo_relocs_this_relaxation_round = n_gregs; | |
2350 | ||
2351 | /* Set the zeroth-order estimate for the GREGs size. */ | |
2352 | gregs_size = n_gregs * 8; | |
2353 | ||
2354 | if (!bfd_set_section_size (bpo_greg_owner, bpo_gregs_section, gregs_size)) | |
b34976b6 | 2355 | return FALSE; |
930b4cb2 HPN |
2356 | |
2357 | /* Allocate and set up the GREG arrays. They're filled in at relaxation | |
2358 | time. Note that we must use the max number ever noted for the array, | |
2359 | since the index numbers were created before GC. */ | |
2360 | gregdata->reloc_request | |
2361 | = bfd_zalloc (bpo_greg_owner, | |
2362 | sizeof (struct bpo_reloc_request) | |
2363 | * gregdata->n_max_bpo_relocs); | |
2364 | ||
2365 | gregdata->bpo_reloc_indexes | |
2366 | = bpo_reloc_indexes | |
2367 | = bfd_alloc (bpo_greg_owner, | |
2368 | gregdata->n_max_bpo_relocs | |
2369 | * sizeof (size_t)); | |
2370 | if (bpo_reloc_indexes == NULL) | |
b34976b6 | 2371 | return FALSE; |
930b4cb2 HPN |
2372 | |
2373 | /* The default order is an identity mapping. */ | |
2374 | for (i = 0; i < gregdata->n_max_bpo_relocs; i++) | |
2375 | { | |
2376 | bpo_reloc_indexes[i] = i; | |
2377 | gregdata->reloc_request[i].bpo_reloc_no = i; | |
2378 | } | |
2379 | ||
b34976b6 | 2380 | return TRUE; |
3c3bdf30 | 2381 | } |
e06fcc86 | 2382 | \f |
930b4cb2 HPN |
2383 | /* Fill in contents in the linker allocated gregs. Everything is |
2384 | calculated at this point; we just move the contents into place here. */ | |
2385 | ||
b34976b6 | 2386 | bfd_boolean |
2c3fc389 NC |
2387 | _bfd_mmix_after_linker_allocation (bfd *abfd ATTRIBUTE_UNUSED, |
2388 | struct bfd_link_info *link_info) | |
930b4cb2 HPN |
2389 | { |
2390 | asection *bpo_gregs_section; | |
2391 | bfd *bpo_greg_owner; | |
2392 | struct bpo_greg_section_info *gregdata; | |
2393 | size_t n_gregs; | |
2394 | size_t i, j; | |
2395 | size_t lastreg; | |
2396 | bfd_byte *contents; | |
2397 | ||
2398 | /* The bpo_greg_owner bfd is supposed to have been set by mmix_elf_check_relocs | |
2399 | when the first R_MMIX_BASE_PLUS_OFFSET is seen. If there is no such | |
2400 | object, there was no R_MMIX_BASE_PLUS_OFFSET. */ | |
2401 | bpo_greg_owner = (bfd *) link_info->base_file; | |
2402 | if (bpo_greg_owner == NULL) | |
b34976b6 | 2403 | return TRUE; |
930b4cb2 HPN |
2404 | |
2405 | bpo_gregs_section | |
2406 | = bfd_get_section_by_name (bpo_greg_owner, | |
2407 | MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME); | |
2408 | ||
2409 | /* This can't happen without DSO handling. When DSOs are handled | |
2410 | without any R_MMIX_BASE_PLUS_OFFSET seen, there will be no such | |
2411 | section. */ | |
2412 | if (bpo_gregs_section == NULL) | |
b34976b6 | 2413 | return TRUE; |
930b4cb2 HPN |
2414 | |
2415 | /* We use the target-data handle in the ELF section data. */ | |
2416 | ||
f0abc2a1 | 2417 | gregdata = mmix_elf_section_data (bpo_gregs_section)->bpo.greg; |
930b4cb2 | 2418 | if (gregdata == NULL) |
b34976b6 | 2419 | return FALSE; |
930b4cb2 HPN |
2420 | |
2421 | n_gregs = gregdata->n_allocated_bpo_gregs; | |
2422 | ||
2423 | bpo_gregs_section->contents | |
eea6121a | 2424 | = contents = bfd_alloc (bpo_greg_owner, bpo_gregs_section->size); |
930b4cb2 | 2425 | if (contents == NULL) |
b34976b6 | 2426 | return FALSE; |
930b4cb2 | 2427 | |
7e799044 HPN |
2428 | /* Sanity check: If these numbers mismatch, some relocation has not been |
2429 | accounted for and the rest of gregdata is probably inconsistent. | |
2430 | It's a bug, but it's more helpful to identify it than segfaulting | |
2431 | below. */ | |
2432 | if (gregdata->n_remaining_bpo_relocs_this_relaxation_round | |
2433 | != gregdata->n_bpo_relocs) | |
2434 | { | |
2435 | (*_bfd_error_handler) | |
2436 | (_("Internal inconsistency: remaining %u != max %u.\n\ | |
2437 | Please report this bug."), | |
2438 | gregdata->n_remaining_bpo_relocs_this_relaxation_round, | |
2439 | gregdata->n_bpo_relocs); | |
b34976b6 | 2440 | return FALSE; |
7e799044 HPN |
2441 | } |
2442 | ||
930b4cb2 HPN |
2443 | for (lastreg = 255, i = 0, j = 0; j < n_gregs; i++) |
2444 | if (gregdata->reloc_request[i].regindex != lastreg) | |
2445 | { | |
2446 | bfd_put_64 (bpo_greg_owner, gregdata->reloc_request[i].value, | |
2447 | contents + j * 8); | |
2448 | lastreg = gregdata->reloc_request[i].regindex; | |
2449 | j++; | |
2450 | } | |
2451 | ||
b34976b6 | 2452 | return TRUE; |
930b4cb2 HPN |
2453 | } |
2454 | ||
2455 | /* Sort valid relocs to come before non-valid relocs, then on increasing | |
2456 | value. */ | |
2457 | ||
2458 | static int | |
2c3fc389 | 2459 | bpo_reloc_request_sort_fn (const void * p1, const void * p2) |
930b4cb2 HPN |
2460 | { |
2461 | const struct bpo_reloc_request *r1 = (const struct bpo_reloc_request *) p1; | |
2462 | const struct bpo_reloc_request *r2 = (const struct bpo_reloc_request *) p2; | |
2463 | ||
2464 | /* Primary function is validity; non-valid relocs sorted after valid | |
2465 | ones. */ | |
2466 | if (r1->valid != r2->valid) | |
2467 | return r2->valid - r1->valid; | |
2468 | ||
4fa5c2a8 HPN |
2469 | /* Then sort on value. Don't simplify and return just the difference of |
2470 | the values: the upper bits of the 64-bit value would be truncated on | |
2471 | a host with 32-bit ints. */ | |
930b4cb2 | 2472 | if (r1->value != r2->value) |
4fa5c2a8 | 2473 | return r1->value > r2->value ? 1 : -1; |
930b4cb2 | 2474 | |
dfbbae4c HPN |
2475 | /* As a last re-sort, use the relocation number, so we get a stable |
2476 | sort. The *addresses* aren't stable since items are swapped during | |
2477 | sorting. It depends on the qsort implementation if this actually | |
2478 | happens. */ | |
2479 | return r1->bpo_reloc_no > r2->bpo_reloc_no | |
2480 | ? 1 : (r1->bpo_reloc_no < r2->bpo_reloc_no ? -1 : 0); | |
930b4cb2 HPN |
2481 | } |
2482 | ||
4fa5c2a8 HPN |
2483 | /* For debug use only. Dumps the global register allocations resulting |
2484 | from base-plus-offset relocs. */ | |
2485 | ||
2486 | void | |
2487 | mmix_dump_bpo_gregs (link_info, pf) | |
2488 | struct bfd_link_info *link_info; | |
2489 | bfd_error_handler_type pf; | |
2490 | { | |
2491 | bfd *bpo_greg_owner; | |
2492 | asection *bpo_gregs_section; | |
2493 | struct bpo_greg_section_info *gregdata; | |
2494 | unsigned int i; | |
2495 | ||
2496 | if (link_info == NULL || link_info->base_file == NULL) | |
2497 | return; | |
2498 | ||
2499 | bpo_greg_owner = (bfd *) link_info->base_file; | |
2500 | ||
2501 | bpo_gregs_section | |
2502 | = bfd_get_section_by_name (bpo_greg_owner, | |
2503 | MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME); | |
2504 | ||
2505 | if (bpo_gregs_section == NULL) | |
2506 | return; | |
2507 | ||
f0abc2a1 | 2508 | gregdata = mmix_elf_section_data (bpo_gregs_section)->bpo.greg; |
4fa5c2a8 HPN |
2509 | if (gregdata == NULL) |
2510 | return; | |
2511 | ||
2512 | if (pf == NULL) | |
2513 | pf = _bfd_error_handler; | |
2514 | ||
2515 | /* These format strings are not translated. They are for debug purposes | |
2516 | only and never displayed to an end user. Should they escape, we | |
2517 | surely want them in original. */ | |
2518 | (*pf) (" n_bpo_relocs: %u\n n_max_bpo_relocs: %u\n n_remain...round: %u\n\ | |
2519 | n_allocated_bpo_gregs: %u\n", gregdata->n_bpo_relocs, | |
2520 | gregdata->n_max_bpo_relocs, | |
2521 | gregdata->n_remaining_bpo_relocs_this_relaxation_round, | |
2522 | gregdata->n_allocated_bpo_gregs); | |
2523 | ||
2524 | if (gregdata->reloc_request) | |
2525 | for (i = 0; i < gregdata->n_max_bpo_relocs; i++) | |
2526 | (*pf) ("%4u (%4u)/%4u#%u: 0x%08lx%08lx r: %3u o: %3u\n", | |
2527 | i, | |
cf3d882d AM |
2528 | (gregdata->bpo_reloc_indexes != NULL |
2529 | ? gregdata->bpo_reloc_indexes[i] : (size_t) -1), | |
4fa5c2a8 HPN |
2530 | gregdata->reloc_request[i].bpo_reloc_no, |
2531 | gregdata->reloc_request[i].valid, | |
2532 | ||
2533 | (unsigned long) (gregdata->reloc_request[i].value >> 32), | |
2534 | (unsigned long) gregdata->reloc_request[i].value, | |
2535 | gregdata->reloc_request[i].regindex, | |
2536 | gregdata->reloc_request[i].offset); | |
2537 | } | |
2538 | ||
930b4cb2 HPN |
2539 | /* This links all R_MMIX_BASE_PLUS_OFFSET relocs into a special array, and |
2540 | when the last such reloc is done, an index-array is sorted according to | |
2541 | the values and iterated over to produce register numbers (indexed by 0 | |
2542 | from the first allocated register number) and offsets for use in real | |
80f540b7 | 2543 | relocation. (N.B.: Relocatable runs are handled, not just punted.) |
930b4cb2 | 2544 | |
f60ebe14 HPN |
2545 | PUSHJ stub accounting is also done here. |
2546 | ||
930b4cb2 HPN |
2547 | Symbol- and reloc-reading infrastructure copied from elf-m10200.c. */ |
2548 | ||
b34976b6 | 2549 | static bfd_boolean |
2c3fc389 NC |
2550 | mmix_elf_relax_section (bfd *abfd, |
2551 | asection *sec, | |
2552 | struct bfd_link_info *link_info, | |
2553 | bfd_boolean *again) | |
930b4cb2 | 2554 | { |
930b4cb2 | 2555 | Elf_Internal_Shdr *symtab_hdr; |
930b4cb2 | 2556 | Elf_Internal_Rela *internal_relocs; |
930b4cb2 HPN |
2557 | Elf_Internal_Rela *irel, *irelend; |
2558 | asection *bpo_gregs_section = NULL; | |
2559 | struct bpo_greg_section_info *gregdata; | |
2560 | struct bpo_reloc_section_info *bpodata | |
f0abc2a1 | 2561 | = mmix_elf_section_data (sec)->bpo.reloc; |
f60ebe14 HPN |
2562 | /* The initialization is to quiet compiler warnings. The value is to |
2563 | spot a missing actual initialization. */ | |
2564 | size_t bpono = (size_t) -1; | |
2565 | size_t pjsno = 0; | |
6cdc0ccc | 2566 | Elf_Internal_Sym *isymbuf = NULL; |
1a23a9e6 | 2567 | bfd_size_type size = sec->rawsize ? sec->rawsize : sec->size; |
f60ebe14 HPN |
2568 | |
2569 | mmix_elf_section_data (sec)->pjs.stubs_size_sum = 0; | |
930b4cb2 HPN |
2570 | |
2571 | /* Assume nothing changes. */ | |
b34976b6 | 2572 | *again = FALSE; |
930b4cb2 | 2573 | |
f60ebe14 HPN |
2574 | /* We don't have to do anything if this section does not have relocs, or |
2575 | if this is not a code section. */ | |
2576 | if ((sec->flags & SEC_RELOC) == 0 | |
930b4cb2 HPN |
2577 | || sec->reloc_count == 0 |
2578 | || (sec->flags & SEC_CODE) == 0 | |
2579 | || (sec->flags & SEC_LINKER_CREATED) != 0 | |
f60ebe14 HPN |
2580 | /* If no R_MMIX_BASE_PLUS_OFFSET relocs and no PUSHJ-stub relocs, |
2581 | then nothing to do. */ | |
2582 | || (bpodata == NULL | |
2583 | && mmix_elf_section_data (sec)->pjs.n_pushj_relocs == 0)) | |
b34976b6 | 2584 | return TRUE; |
930b4cb2 HPN |
2585 | |
2586 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
930b4cb2 | 2587 | |
f60ebe14 HPN |
2588 | if (bpodata != NULL) |
2589 | { | |
2590 | bpo_gregs_section = bpodata->bpo_greg_section; | |
2591 | gregdata = mmix_elf_section_data (bpo_gregs_section)->bpo.greg; | |
2592 | bpono = bpodata->first_base_plus_offset_reloc; | |
2593 | } | |
2594 | else | |
2595 | gregdata = NULL; | |
930b4cb2 HPN |
2596 | |
2597 | /* Get a copy of the native relocations. */ | |
2598 | internal_relocs | |
2c3fc389 | 2599 | = _bfd_elf_link_read_relocs (abfd, sec, NULL, |
45d6a902 AM |
2600 | (Elf_Internal_Rela *) NULL, |
2601 | link_info->keep_memory); | |
930b4cb2 HPN |
2602 | if (internal_relocs == NULL) |
2603 | goto error_return; | |
930b4cb2 HPN |
2604 | |
2605 | /* Walk through them looking for relaxing opportunities. */ | |
2606 | irelend = internal_relocs + sec->reloc_count; | |
2607 | for (irel = internal_relocs; irel < irelend; irel++) | |
2608 | { | |
2609 | bfd_vma symval; | |
f60ebe14 | 2610 | struct elf_link_hash_entry *h = NULL; |
930b4cb2 | 2611 | |
f60ebe14 HPN |
2612 | /* We only process two relocs. */ |
2613 | if (ELF64_R_TYPE (irel->r_info) != (int) R_MMIX_BASE_PLUS_OFFSET | |
2614 | && ELF64_R_TYPE (irel->r_info) != (int) R_MMIX_PUSHJ_STUBBABLE) | |
930b4cb2 HPN |
2615 | continue; |
2616 | ||
f60ebe14 HPN |
2617 | /* We process relocs in a distinctly different way when this is a |
2618 | relocatable link (for one, we don't look at symbols), so we avoid | |
2619 | mixing its code with that for the "normal" relaxation. */ | |
2620 | if (link_info->relocatable) | |
2621 | { | |
2622 | /* The only transformation in a relocatable link is to generate | |
2623 | a full stub at the location of the stub calculated for the | |
2624 | input section, if the relocated stub location, the end of the | |
2625 | output section plus earlier stubs, cannot be reached. Thus | |
2626 | relocatable linking can only lead to worse code, but it still | |
2627 | works. */ | |
2628 | if (ELF64_R_TYPE (irel->r_info) == R_MMIX_PUSHJ_STUBBABLE) | |
2629 | { | |
2630 | /* If we can reach the end of the output-section and beyond | |
2631 | any current stubs, then we don't need a stub for this | |
2632 | reloc. The relaxed order of output stub allocation may | |
2633 | not exactly match the straightforward order, so we always | |
2634 | assume presence of output stubs, which will allow | |
2635 | relaxation only on relocations indifferent to the | |
2636 | presence of output stub allocations for other relocations | |
2637 | and thus the order of output stub allocation. */ | |
2638 | if (bfd_check_overflow (complain_overflow_signed, | |
2639 | 19, | |
2640 | 0, | |
2641 | bfd_arch_bits_per_address (abfd), | |
2642 | /* Output-stub location. */ | |
1a23a9e6 | 2643 | sec->output_section->rawsize |
f60ebe14 HPN |
2644 | + (mmix_elf_section_data (sec |
2645 | ->output_section) | |
2646 | ->pjs.stubs_size_sum) | |
2647 | /* Location of this PUSHJ reloc. */ | |
2648 | - (sec->output_offset + irel->r_offset) | |
2649 | /* Don't count *this* stub twice. */ | |
2650 | - (mmix_elf_section_data (sec) | |
2651 | ->pjs.stub_size[pjsno] | |
2652 | + MAX_PUSHJ_STUB_SIZE)) | |
2653 | == bfd_reloc_ok) | |
2654 | mmix_elf_section_data (sec)->pjs.stub_size[pjsno] = 0; | |
2655 | ||
2656 | mmix_elf_section_data (sec)->pjs.stubs_size_sum | |
2657 | += mmix_elf_section_data (sec)->pjs.stub_size[pjsno]; | |
2658 | ||
2659 | pjsno++; | |
2660 | } | |
2661 | ||
2662 | continue; | |
2663 | } | |
2664 | ||
930b4cb2 HPN |
2665 | /* Get the value of the symbol referred to by the reloc. */ |
2666 | if (ELF64_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
2667 | { | |
2668 | /* A local symbol. */ | |
6cdc0ccc | 2669 | Elf_Internal_Sym *isym; |
930b4cb2 HPN |
2670 | asection *sym_sec; |
2671 | ||
6cdc0ccc AM |
2672 | /* Read this BFD's local symbols if we haven't already. */ |
2673 | if (isymbuf == NULL) | |
2674 | { | |
2675 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
2676 | if (isymbuf == NULL) | |
2677 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
2678 | symtab_hdr->sh_info, 0, | |
2679 | NULL, NULL, NULL); | |
2680 | if (isymbuf == 0) | |
2681 | goto error_return; | |
2682 | } | |
930b4cb2 | 2683 | |
6cdc0ccc AM |
2684 | isym = isymbuf + ELF64_R_SYM (irel->r_info); |
2685 | if (isym->st_shndx == SHN_UNDEF) | |
930b4cb2 | 2686 | sym_sec = bfd_und_section_ptr; |
6cdc0ccc | 2687 | else if (isym->st_shndx == SHN_ABS) |
930b4cb2 | 2688 | sym_sec = bfd_abs_section_ptr; |
6cdc0ccc | 2689 | else if (isym->st_shndx == SHN_COMMON) |
930b4cb2 HPN |
2690 | sym_sec = bfd_com_section_ptr; |
2691 | else | |
6cdc0ccc AM |
2692 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
2693 | symval = (isym->st_value | |
930b4cb2 HPN |
2694 | + sym_sec->output_section->vma |
2695 | + sym_sec->output_offset); | |
2696 | } | |
2697 | else | |
2698 | { | |
2699 | unsigned long indx; | |
930b4cb2 HPN |
2700 | |
2701 | /* An external symbol. */ | |
2702 | indx = ELF64_R_SYM (irel->r_info) - symtab_hdr->sh_info; | |
2703 | h = elf_sym_hashes (abfd)[indx]; | |
2704 | BFD_ASSERT (h != NULL); | |
2705 | if (h->root.type != bfd_link_hash_defined | |
2706 | && h->root.type != bfd_link_hash_defweak) | |
2707 | { | |
f60ebe14 HPN |
2708 | /* This appears to be a reference to an undefined symbol. Just |
2709 | ignore it--it will be caught by the regular reloc processing. | |
2710 | We need to keep BPO reloc accounting consistent, though | |
2711 | else we'll abort instead of emitting an error message. */ | |
2712 | if (ELF64_R_TYPE (irel->r_info) == R_MMIX_BASE_PLUS_OFFSET | |
2713 | && gregdata != NULL) | |
2714 | { | |
2715 | gregdata->n_remaining_bpo_relocs_this_relaxation_round--; | |
2716 | bpono++; | |
2717 | } | |
930b4cb2 HPN |
2718 | continue; |
2719 | } | |
2720 | ||
2721 | symval = (h->root.u.def.value | |
2722 | + h->root.u.def.section->output_section->vma | |
2723 | + h->root.u.def.section->output_offset); | |
2724 | } | |
2725 | ||
f60ebe14 HPN |
2726 | if (ELF64_R_TYPE (irel->r_info) == (int) R_MMIX_PUSHJ_STUBBABLE) |
2727 | { | |
2728 | bfd_vma value = symval + irel->r_addend; | |
2729 | bfd_vma dot | |
2730 | = (sec->output_section->vma | |
2731 | + sec->output_offset | |
2732 | + irel->r_offset); | |
2733 | bfd_vma stubaddr | |
2734 | = (sec->output_section->vma | |
2735 | + sec->output_offset | |
eea6121a | 2736 | + size |
f60ebe14 HPN |
2737 | + mmix_elf_section_data (sec)->pjs.stubs_size_sum); |
2738 | ||
2739 | if ((value & 3) == 0 | |
2740 | && bfd_check_overflow (complain_overflow_signed, | |
2741 | 19, | |
2742 | 0, | |
2743 | bfd_arch_bits_per_address (abfd), | |
2744 | value - dot | |
2745 | - (value > dot | |
2746 | ? mmix_elf_section_data (sec) | |
2747 | ->pjs.stub_size[pjsno] | |
2748 | : 0)) | |
2749 | == bfd_reloc_ok) | |
2750 | /* If the reloc fits, no stub is needed. */ | |
2751 | mmix_elf_section_data (sec)->pjs.stub_size[pjsno] = 0; | |
2752 | else | |
2753 | /* Maybe we can get away with just a JMP insn? */ | |
2754 | if ((value & 3) == 0 | |
2755 | && bfd_check_overflow (complain_overflow_signed, | |
2756 | 27, | |
2757 | 0, | |
2758 | bfd_arch_bits_per_address (abfd), | |
2759 | value - stubaddr | |
2760 | - (value > dot | |
2761 | ? mmix_elf_section_data (sec) | |
2762 | ->pjs.stub_size[pjsno] - 4 | |
2763 | : 0)) | |
2764 | == bfd_reloc_ok) | |
2765 | /* Yep, account for a stub consisting of a single JMP insn. */ | |
2766 | mmix_elf_section_data (sec)->pjs.stub_size[pjsno] = 4; | |
2767 | else | |
2768 | /* Nope, go for the full insn stub. It doesn't seem useful to | |
2769 | emit the intermediate sizes; those will only be useful for | |
2770 | a >64M program assuming contiguous code. */ | |
2771 | mmix_elf_section_data (sec)->pjs.stub_size[pjsno] | |
2772 | = MAX_PUSHJ_STUB_SIZE; | |
2773 | ||
2774 | mmix_elf_section_data (sec)->pjs.stubs_size_sum | |
2775 | += mmix_elf_section_data (sec)->pjs.stub_size[pjsno]; | |
2776 | pjsno++; | |
2777 | continue; | |
2778 | } | |
2779 | ||
2780 | /* We're looking at a R_MMIX_BASE_PLUS_OFFSET reloc. */ | |
2781 | ||
930b4cb2 HPN |
2782 | gregdata->reloc_request[gregdata->bpo_reloc_indexes[bpono]].value |
2783 | = symval + irel->r_addend; | |
b34976b6 | 2784 | gregdata->reloc_request[gregdata->bpo_reloc_indexes[bpono++]].valid = TRUE; |
930b4cb2 HPN |
2785 | gregdata->n_remaining_bpo_relocs_this_relaxation_round--; |
2786 | } | |
2787 | ||
2788 | /* Check if that was the last BPO-reloc. If so, sort the values and | |
2789 | calculate how many registers we need to cover them. Set the size of | |
2790 | the linker gregs, and if the number of registers changed, indicate | |
2791 | that we need to relax some more because we have more work to do. */ | |
f60ebe14 HPN |
2792 | if (gregdata != NULL |
2793 | && gregdata->n_remaining_bpo_relocs_this_relaxation_round == 0) | |
930b4cb2 HPN |
2794 | { |
2795 | size_t i; | |
2796 | bfd_vma prev_base; | |
2797 | size_t regindex; | |
2798 | ||
2799 | /* First, reset the remaining relocs for the next round. */ | |
2800 | gregdata->n_remaining_bpo_relocs_this_relaxation_round | |
2801 | = gregdata->n_bpo_relocs; | |
2802 | ||
2c3fc389 | 2803 | qsort (gregdata->reloc_request, |
930b4cb2 HPN |
2804 | gregdata->n_max_bpo_relocs, |
2805 | sizeof (struct bpo_reloc_request), | |
2806 | bpo_reloc_request_sort_fn); | |
2807 | ||
2808 | /* Recalculate indexes. When we find a change (however unlikely | |
2809 | after the initial iteration), we know we need to relax again, | |
2810 | since items in the GREG-array are sorted by increasing value and | |
2811 | stored in the relaxation phase. */ | |
2812 | for (i = 0; i < gregdata->n_max_bpo_relocs; i++) | |
2813 | if (gregdata->bpo_reloc_indexes[gregdata->reloc_request[i].bpo_reloc_no] | |
2814 | != i) | |
2815 | { | |
2816 | gregdata->bpo_reloc_indexes[gregdata->reloc_request[i].bpo_reloc_no] | |
2817 | = i; | |
b34976b6 | 2818 | *again = TRUE; |
930b4cb2 HPN |
2819 | } |
2820 | ||
2821 | /* Allocate register numbers (indexing from 0). Stop at the first | |
2822 | non-valid reloc. */ | |
2823 | for (i = 0, regindex = 0, prev_base = gregdata->reloc_request[0].value; | |
2824 | i < gregdata->n_bpo_relocs; | |
2825 | i++) | |
2826 | { | |
2827 | if (gregdata->reloc_request[i].value > prev_base + 255) | |
2828 | { | |
2829 | regindex++; | |
2830 | prev_base = gregdata->reloc_request[i].value; | |
2831 | } | |
2832 | gregdata->reloc_request[i].regindex = regindex; | |
2833 | gregdata->reloc_request[i].offset | |
2834 | = gregdata->reloc_request[i].value - prev_base; | |
2835 | } | |
2836 | ||
2837 | /* If it's not the same as the last time, we need to relax again, | |
2838 | because the size of the section has changed. I'm not sure we | |
2839 | actually need to do any adjustments since the shrinking happens | |
2840 | at the start of this section, but better safe than sorry. */ | |
2841 | if (gregdata->n_allocated_bpo_gregs != regindex + 1) | |
2842 | { | |
2843 | gregdata->n_allocated_bpo_gregs = regindex + 1; | |
b34976b6 | 2844 | *again = TRUE; |
930b4cb2 HPN |
2845 | } |
2846 | ||
eea6121a | 2847 | bpo_gregs_section->size = (regindex + 1) * 8; |
930b4cb2 HPN |
2848 | } |
2849 | ||
6cdc0ccc | 2850 | if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents) |
930b4cb2 HPN |
2851 | { |
2852 | if (! link_info->keep_memory) | |
6cdc0ccc AM |
2853 | free (isymbuf); |
2854 | else | |
930b4cb2 | 2855 | { |
6cdc0ccc AM |
2856 | /* Cache the symbols for elf_link_input_bfd. */ |
2857 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
930b4cb2 HPN |
2858 | } |
2859 | } | |
2860 | ||
6cdc0ccc AM |
2861 | if (internal_relocs != NULL |
2862 | && elf_section_data (sec)->relocs != internal_relocs) | |
2863 | free (internal_relocs); | |
2864 | ||
eea6121a | 2865 | if (sec->size < size + mmix_elf_section_data (sec)->pjs.stubs_size_sum) |
f60ebe14 HPN |
2866 | abort (); |
2867 | ||
eea6121a | 2868 | if (sec->size > size + mmix_elf_section_data (sec)->pjs.stubs_size_sum) |
f60ebe14 | 2869 | { |
eea6121a | 2870 | sec->size = size + mmix_elf_section_data (sec)->pjs.stubs_size_sum; |
f60ebe14 HPN |
2871 | *again = TRUE; |
2872 | } | |
2873 | ||
b34976b6 | 2874 | return TRUE; |
930b4cb2 HPN |
2875 | |
2876 | error_return: | |
6cdc0ccc AM |
2877 | if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents) |
2878 | free (isymbuf); | |
2879 | if (internal_relocs != NULL | |
2880 | && elf_section_data (sec)->relocs != internal_relocs) | |
2881 | free (internal_relocs); | |
b34976b6 | 2882 | return FALSE; |
930b4cb2 HPN |
2883 | } |
2884 | \f | |
3c3bdf30 NC |
2885 | #define ELF_ARCH bfd_arch_mmix |
2886 | #define ELF_MACHINE_CODE EM_MMIX | |
2887 | ||
2888 | /* According to mmix-doc page 36 (paragraph 45), this should be (1LL << 48LL). | |
2889 | However, that's too much for something somewhere in the linker part of | |
2890 | BFD; perhaps the start-address has to be a non-zero multiple of this | |
2891 | number, or larger than this number. The symptom is that the linker | |
2892 | complains: "warning: allocated section `.text' not in segment". We | |
2893 | settle for 64k; the page-size used in examples is 8k. | |
2894 | #define ELF_MAXPAGESIZE 0x10000 | |
2895 | ||
2896 | Unfortunately, this causes excessive padding in the supposedly small | |
2897 | for-education programs that are the expected usage (where people would | |
2898 | inspect output). We stick to 256 bytes just to have *some* default | |
2899 | alignment. */ | |
2900 | #define ELF_MAXPAGESIZE 0x100 | |
2901 | ||
2902 | #define TARGET_BIG_SYM bfd_elf64_mmix_vec | |
2903 | #define TARGET_BIG_NAME "elf64-mmix" | |
2904 | ||
2905 | #define elf_info_to_howto_rel NULL | |
2906 | #define elf_info_to_howto mmix_info_to_howto_rela | |
2907 | #define elf_backend_relocate_section mmix_elf_relocate_section | |
2908 | #define elf_backend_gc_mark_hook mmix_elf_gc_mark_hook | |
930b4cb2 HPN |
2909 | #define elf_backend_gc_sweep_hook mmix_elf_gc_sweep_hook |
2910 | ||
3c3bdf30 NC |
2911 | #define elf_backend_link_output_symbol_hook \ |
2912 | mmix_elf_link_output_symbol_hook | |
2913 | #define elf_backend_add_symbol_hook mmix_elf_add_symbol_hook | |
2914 | ||
2915 | #define elf_backend_check_relocs mmix_elf_check_relocs | |
2916 | #define elf_backend_symbol_processing mmix_elf_symbol_processing | |
74541ad4 AM |
2917 | #define elf_backend_omit_section_dynsym \ |
2918 | ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) | |
3c3bdf30 NC |
2919 | |
2920 | #define bfd_elf64_bfd_is_local_label_name \ | |
2921 | mmix_elf_is_local_label_name | |
2922 | ||
2923 | #define elf_backend_may_use_rel_p 0 | |
2924 | #define elf_backend_may_use_rela_p 1 | |
2925 | #define elf_backend_default_use_rela_p 1 | |
2926 | ||
2927 | #define elf_backend_can_gc_sections 1 | |
2928 | #define elf_backend_section_from_bfd_section \ | |
2929 | mmix_elf_section_from_bfd_section | |
2930 | ||
f0abc2a1 | 2931 | #define bfd_elf64_new_section_hook mmix_elf_new_section_hook |
3c3bdf30 | 2932 | #define bfd_elf64_bfd_final_link mmix_elf_final_link |
930b4cb2 | 2933 | #define bfd_elf64_bfd_relax_section mmix_elf_relax_section |
3c3bdf30 NC |
2934 | |
2935 | #include "elf64-target.h" |