Commit | Line | Data |
---|---|---|
3c3bdf30 | 1 | /* MMIX-specific support for 64-bit ELF. |
ab96bf03 | 2 | Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007 |
f592407e | 3 | Free Software Foundation, Inc. |
3c3bdf30 NC |
4 | Contributed by Hans-Peter Nilsson <hp@bitrange.com> |
5 | ||
6 | This file is part of BFD, the Binary File Descriptor library. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
3e110533 | 20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
3c3bdf30 NC |
21 | |
22 | /* No specific ABI or "processor-specific supplement" defined. */ | |
23 | ||
24 | /* TODO: | |
f60ebe14 HPN |
25 | - "Traditional" linker relaxation (shrinking whole sections). |
26 | - Merge reloc stubs jumping to same location. | |
27 | - GETA stub relaxation (call a stub for out of range new | |
28 | R_MMIX_GETA_STUBBABLE). */ | |
3c3bdf30 | 29 | |
3c3bdf30 | 30 | #include "sysdep.h" |
3db64b00 | 31 | #include "bfd.h" |
3c3bdf30 NC |
32 | #include "libbfd.h" |
33 | #include "elf-bfd.h" | |
34 | #include "elf/mmix.h" | |
35 | #include "opcode/mmix.h" | |
36 | ||
37 | #define MINUS_ONE (((bfd_vma) 0) - 1) | |
38 | ||
f60ebe14 HPN |
39 | #define MAX_PUSHJ_STUB_SIZE (5 * 4) |
40 | ||
3c3bdf30 NC |
41 | /* Put these everywhere in new code. */ |
42 | #define FATAL_DEBUG \ | |
43 | _bfd_abort (__FILE__, __LINE__, \ | |
44 | "Internal: Non-debugged code (test-case missing)") | |
45 | ||
46 | #define BAD_CASE(x) \ | |
47 | _bfd_abort (__FILE__, __LINE__, \ | |
48 | "bad case for " #x) | |
49 | ||
f0abc2a1 AM |
50 | struct _mmix_elf_section_data |
51 | { | |
52 | struct bfd_elf_section_data elf; | |
53 | union | |
54 | { | |
55 | struct bpo_reloc_section_info *reloc; | |
56 | struct bpo_greg_section_info *greg; | |
57 | } bpo; | |
f60ebe14 HPN |
58 | |
59 | struct pushj_stub_info | |
60 | { | |
61 | /* Maximum number of stubs needed for this section. */ | |
62 | bfd_size_type n_pushj_relocs; | |
63 | ||
64 | /* Size of stubs after a mmix_elf_relax_section round. */ | |
65 | bfd_size_type stubs_size_sum; | |
66 | ||
67 | /* Per-reloc stubs_size_sum information. The stubs_size_sum member is the sum | |
68 | of these. Allocated in mmix_elf_check_common_relocs. */ | |
69 | bfd_size_type *stub_size; | |
70 | ||
71 | /* Offset of next stub during relocation. Somewhat redundant with the | |
72 | above: error coverage is easier and we don't have to reset the | |
73 | stubs_size_sum for relocation. */ | |
74 | bfd_size_type stub_offset; | |
75 | } pjs; | |
f0abc2a1 AM |
76 | }; |
77 | ||
78 | #define mmix_elf_section_data(sec) \ | |
68bfbfcc | 79 | ((struct _mmix_elf_section_data *) elf_section_data (sec)) |
f0abc2a1 | 80 | |
930b4cb2 | 81 | /* For each section containing a base-plus-offset (BPO) reloc, we attach |
f0abc2a1 | 82 | this struct as mmix_elf_section_data (section)->bpo, which is otherwise |
930b4cb2 HPN |
83 | NULL. */ |
84 | struct bpo_reloc_section_info | |
85 | { | |
86 | /* The base is 1; this is the first number in this section. */ | |
87 | size_t first_base_plus_offset_reloc; | |
88 | ||
89 | /* Number of BPO-relocs in this section. */ | |
90 | size_t n_bpo_relocs_this_section; | |
91 | ||
92 | /* Running index, used at relocation time. */ | |
93 | size_t bpo_index; | |
94 | ||
95 | /* We don't have access to the bfd_link_info struct in | |
96 | mmix_final_link_relocate. What we really want to get at is the | |
97 | global single struct greg_relocation, so we stash it here. */ | |
98 | asection *bpo_greg_section; | |
99 | }; | |
100 | ||
101 | /* Helper struct (in global context) for the one below. | |
102 | There's one of these created for every BPO reloc. */ | |
103 | struct bpo_reloc_request | |
104 | { | |
105 | bfd_vma value; | |
106 | ||
107 | /* Valid after relaxation. The base is 0; the first register number | |
108 | must be added. The offset is in range 0..255. */ | |
109 | size_t regindex; | |
110 | size_t offset; | |
111 | ||
112 | /* The order number for this BPO reloc, corresponding to the order in | |
113 | which BPO relocs were found. Used to create an index after reloc | |
114 | requests are sorted. */ | |
115 | size_t bpo_reloc_no; | |
116 | ||
117 | /* Set when the value is computed. Better than coding "guard values" | |
b34976b6 | 118 | into the other members. Is FALSE only for BPO relocs in a GC:ed |
930b4cb2 | 119 | section. */ |
b34976b6 | 120 | bfd_boolean valid; |
930b4cb2 HPN |
121 | }; |
122 | ||
f0abc2a1 | 123 | /* We attach this as mmix_elf_section_data (sec)->bpo in the linker-allocated |
930b4cb2 HPN |
124 | greg contents section (MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME), |
125 | which is linked into the register contents section | |
126 | (MMIX_REG_CONTENTS_SECTION_NAME). This section is created by the | |
127 | linker; using the same hook as for usual with BPO relocs does not | |
128 | collide. */ | |
129 | struct bpo_greg_section_info | |
130 | { | |
131 | /* After GC, this reflects the number of remaining, non-excluded | |
132 | BPO-relocs. */ | |
133 | size_t n_bpo_relocs; | |
134 | ||
135 | /* This is the number of allocated bpo_reloc_requests; the size of | |
136 | sorted_indexes. Valid after the check.*relocs functions are called | |
137 | for all incoming sections. It includes the number of BPO relocs in | |
138 | sections that were GC:ed. */ | |
139 | size_t n_max_bpo_relocs; | |
140 | ||
141 | /* A counter used to find out when to fold the BPO gregs, since we | |
142 | don't have a single "after-relaxation" hook. */ | |
143 | size_t n_remaining_bpo_relocs_this_relaxation_round; | |
144 | ||
145 | /* The number of linker-allocated GREGs resulting from BPO relocs. | |
f60ebe14 HPN |
146 | This is an approximation after _bfd_mmix_before_linker_allocation |
147 | and supposedly accurate after mmix_elf_relax_section is called for | |
148 | all incoming non-collected sections. */ | |
930b4cb2 HPN |
149 | size_t n_allocated_bpo_gregs; |
150 | ||
151 | /* Index into reloc_request[], sorted on increasing "value", secondary | |
152 | by increasing index for strict sorting order. */ | |
153 | size_t *bpo_reloc_indexes; | |
154 | ||
155 | /* An array of all relocations, with the "value" member filled in by | |
156 | the relaxation function. */ | |
157 | struct bpo_reloc_request *reloc_request; | |
158 | }; | |
159 | ||
b34976b6 | 160 | static bfd_boolean mmix_elf_link_output_symbol_hook |
754021d0 AM |
161 | PARAMS ((struct bfd_link_info *, const char *, Elf_Internal_Sym *, |
162 | asection *, struct elf_link_hash_entry *)); | |
3c3bdf30 NC |
163 | |
164 | static bfd_reloc_status_type mmix_elf_reloc | |
165 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
166 | ||
167 | static reloc_howto_type *bfd_elf64_bfd_reloc_type_lookup | |
168 | PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
169 | ||
170 | static void mmix_info_to_howto_rela | |
947216bf | 171 | PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); |
3c3bdf30 NC |
172 | |
173 | static int mmix_elf_sort_relocs PARAMS ((const PTR, const PTR)); | |
174 | ||
f0abc2a1 AM |
175 | static bfd_boolean mmix_elf_new_section_hook |
176 | PARAMS ((bfd *, asection *)); | |
177 | ||
b34976b6 | 178 | static bfd_boolean mmix_elf_check_relocs |
3c3bdf30 NC |
179 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
180 | const Elf_Internal_Rela *)); | |
181 | ||
b34976b6 | 182 | static bfd_boolean mmix_elf_check_common_relocs |
930b4cb2 HPN |
183 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
184 | const Elf_Internal_Rela *)); | |
185 | ||
b34976b6 | 186 | static bfd_boolean mmix_elf_relocate_section |
3c3bdf30 NC |
187 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
188 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
189 | ||
3c3bdf30 NC |
190 | static bfd_reloc_status_type mmix_final_link_relocate |
191 | PARAMS ((reloc_howto_type *, asection *, bfd_byte *, | |
192 | bfd_vma, bfd_signed_vma, bfd_vma, const char *, asection *)); | |
193 | ||
194 | static bfd_reloc_status_type mmix_elf_perform_relocation | |
195 | PARAMS ((asection *, reloc_howto_type *, PTR, bfd_vma, bfd_vma)); | |
196 | ||
b34976b6 | 197 | static bfd_boolean mmix_elf_section_from_bfd_section |
af746e92 | 198 | PARAMS ((bfd *, asection *, int *)); |
3c3bdf30 | 199 | |
b34976b6 | 200 | static bfd_boolean mmix_elf_add_symbol_hook |
555cd476 | 201 | PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Sym *, |
3c3bdf30 NC |
202 | const char **, flagword *, asection **, bfd_vma *)); |
203 | ||
b34976b6 | 204 | static bfd_boolean mmix_elf_is_local_label_name |
3c3bdf30 NC |
205 | PARAMS ((bfd *, const char *)); |
206 | ||
930b4cb2 HPN |
207 | static int bpo_reloc_request_sort_fn PARAMS ((const PTR, const PTR)); |
208 | ||
b34976b6 | 209 | static bfd_boolean mmix_elf_relax_section |
930b4cb2 | 210 | PARAMS ((bfd *abfd, asection *sec, struct bfd_link_info *link_info, |
b34976b6 | 211 | bfd_boolean *again)); |
930b4cb2 | 212 | |
b34976b6 | 213 | extern bfd_boolean mmix_elf_final_link PARAMS ((bfd *, struct bfd_link_info *)); |
3c3bdf30 NC |
214 | |
215 | extern void mmix_elf_symbol_processing PARAMS ((bfd *, asymbol *)); | |
216 | ||
4fa5c2a8 HPN |
217 | /* Only intended to be called from a debugger. */ |
218 | extern void mmix_dump_bpo_gregs | |
219 | PARAMS ((struct bfd_link_info *, bfd_error_handler_type)); | |
220 | ||
f60ebe14 HPN |
221 | static void |
222 | mmix_set_relaxable_size | |
223 | PARAMS ((bfd *, asection *, void *)); | |
224 | ||
f60ebe14 | 225 | |
3c3bdf30 NC |
226 | /* Watch out: this currently needs to have elements with the same index as |
227 | their R_MMIX_ number. */ | |
228 | static reloc_howto_type elf_mmix_howto_table[] = | |
229 | { | |
230 | /* This reloc does nothing. */ | |
231 | HOWTO (R_MMIX_NONE, /* type */ | |
232 | 0, /* rightshift */ | |
233 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
234 | 32, /* bitsize */ | |
b34976b6 | 235 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
236 | 0, /* bitpos */ |
237 | complain_overflow_bitfield, /* complain_on_overflow */ | |
238 | bfd_elf_generic_reloc, /* special_function */ | |
239 | "R_MMIX_NONE", /* name */ | |
b34976b6 | 240 | FALSE, /* partial_inplace */ |
3c3bdf30 NC |
241 | 0, /* src_mask */ |
242 | 0, /* dst_mask */ | |
b34976b6 | 243 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
244 | |
245 | /* An 8 bit absolute relocation. */ | |
246 | HOWTO (R_MMIX_8, /* type */ | |
247 | 0, /* rightshift */ | |
248 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
249 | 8, /* bitsize */ | |
b34976b6 | 250 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
251 | 0, /* bitpos */ |
252 | complain_overflow_bitfield, /* complain_on_overflow */ | |
253 | bfd_elf_generic_reloc, /* special_function */ | |
254 | "R_MMIX_8", /* name */ | |
b34976b6 | 255 | FALSE, /* partial_inplace */ |
930b4cb2 | 256 | 0, /* src_mask */ |
3c3bdf30 | 257 | 0xff, /* dst_mask */ |
b34976b6 | 258 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
259 | |
260 | /* An 16 bit absolute relocation. */ | |
261 | HOWTO (R_MMIX_16, /* type */ | |
262 | 0, /* rightshift */ | |
263 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
264 | 16, /* bitsize */ | |
b34976b6 | 265 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
266 | 0, /* bitpos */ |
267 | complain_overflow_bitfield, /* complain_on_overflow */ | |
268 | bfd_elf_generic_reloc, /* special_function */ | |
269 | "R_MMIX_16", /* name */ | |
b34976b6 | 270 | FALSE, /* partial_inplace */ |
930b4cb2 | 271 | 0, /* src_mask */ |
3c3bdf30 | 272 | 0xffff, /* dst_mask */ |
b34976b6 | 273 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
274 | |
275 | /* An 24 bit absolute relocation. */ | |
276 | HOWTO (R_MMIX_24, /* type */ | |
277 | 0, /* rightshift */ | |
278 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
279 | 24, /* bitsize */ | |
b34976b6 | 280 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
281 | 0, /* bitpos */ |
282 | complain_overflow_bitfield, /* complain_on_overflow */ | |
283 | bfd_elf_generic_reloc, /* special_function */ | |
284 | "R_MMIX_24", /* name */ | |
b34976b6 | 285 | FALSE, /* partial_inplace */ |
930b4cb2 | 286 | ~0xffffff, /* src_mask */ |
3c3bdf30 | 287 | 0xffffff, /* dst_mask */ |
b34976b6 | 288 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
289 | |
290 | /* A 32 bit absolute relocation. */ | |
291 | HOWTO (R_MMIX_32, /* type */ | |
292 | 0, /* rightshift */ | |
293 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
294 | 32, /* bitsize */ | |
b34976b6 | 295 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
296 | 0, /* bitpos */ |
297 | complain_overflow_bitfield, /* complain_on_overflow */ | |
298 | bfd_elf_generic_reloc, /* special_function */ | |
299 | "R_MMIX_32", /* name */ | |
b34976b6 | 300 | FALSE, /* partial_inplace */ |
930b4cb2 | 301 | 0, /* src_mask */ |
3c3bdf30 | 302 | 0xffffffff, /* dst_mask */ |
b34976b6 | 303 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
304 | |
305 | /* 64 bit relocation. */ | |
306 | HOWTO (R_MMIX_64, /* type */ | |
307 | 0, /* rightshift */ | |
308 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
309 | 64, /* bitsize */ | |
b34976b6 | 310 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
311 | 0, /* bitpos */ |
312 | complain_overflow_bitfield, /* complain_on_overflow */ | |
313 | bfd_elf_generic_reloc, /* special_function */ | |
314 | "R_MMIX_64", /* name */ | |
b34976b6 | 315 | FALSE, /* partial_inplace */ |
930b4cb2 | 316 | 0, /* src_mask */ |
3c3bdf30 | 317 | MINUS_ONE, /* dst_mask */ |
b34976b6 | 318 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
319 | |
320 | /* An 8 bit PC-relative relocation. */ | |
321 | HOWTO (R_MMIX_PC_8, /* type */ | |
322 | 0, /* rightshift */ | |
323 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
324 | 8, /* bitsize */ | |
b34976b6 | 325 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
326 | 0, /* bitpos */ |
327 | complain_overflow_bitfield, /* complain_on_overflow */ | |
328 | bfd_elf_generic_reloc, /* special_function */ | |
329 | "R_MMIX_PC_8", /* name */ | |
b34976b6 | 330 | FALSE, /* partial_inplace */ |
930b4cb2 | 331 | 0, /* src_mask */ |
3c3bdf30 | 332 | 0xff, /* dst_mask */ |
b34976b6 | 333 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
334 | |
335 | /* An 16 bit PC-relative relocation. */ | |
336 | HOWTO (R_MMIX_PC_16, /* type */ | |
337 | 0, /* rightshift */ | |
338 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
339 | 16, /* bitsize */ | |
b34976b6 | 340 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
341 | 0, /* bitpos */ |
342 | complain_overflow_bitfield, /* complain_on_overflow */ | |
343 | bfd_elf_generic_reloc, /* special_function */ | |
344 | "R_MMIX_PC_16", /* name */ | |
b34976b6 | 345 | FALSE, /* partial_inplace */ |
930b4cb2 | 346 | 0, /* src_mask */ |
3c3bdf30 | 347 | 0xffff, /* dst_mask */ |
b34976b6 | 348 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
349 | |
350 | /* An 24 bit PC-relative relocation. */ | |
351 | HOWTO (R_MMIX_PC_24, /* type */ | |
352 | 0, /* rightshift */ | |
353 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
354 | 24, /* bitsize */ | |
b34976b6 | 355 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
356 | 0, /* bitpos */ |
357 | complain_overflow_bitfield, /* complain_on_overflow */ | |
358 | bfd_elf_generic_reloc, /* special_function */ | |
359 | "R_MMIX_PC_24", /* name */ | |
b34976b6 | 360 | FALSE, /* partial_inplace */ |
930b4cb2 | 361 | ~0xffffff, /* src_mask */ |
3c3bdf30 | 362 | 0xffffff, /* dst_mask */ |
b34976b6 | 363 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
364 | |
365 | /* A 32 bit absolute PC-relative relocation. */ | |
366 | HOWTO (R_MMIX_PC_32, /* type */ | |
367 | 0, /* rightshift */ | |
368 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
369 | 32, /* bitsize */ | |
b34976b6 | 370 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
371 | 0, /* bitpos */ |
372 | complain_overflow_bitfield, /* complain_on_overflow */ | |
373 | bfd_elf_generic_reloc, /* special_function */ | |
374 | "R_MMIX_PC_32", /* name */ | |
b34976b6 | 375 | FALSE, /* partial_inplace */ |
930b4cb2 | 376 | 0, /* src_mask */ |
3c3bdf30 | 377 | 0xffffffff, /* dst_mask */ |
b34976b6 | 378 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
379 | |
380 | /* 64 bit PC-relative relocation. */ | |
381 | HOWTO (R_MMIX_PC_64, /* type */ | |
382 | 0, /* rightshift */ | |
383 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
384 | 64, /* bitsize */ | |
b34976b6 | 385 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
386 | 0, /* bitpos */ |
387 | complain_overflow_bitfield, /* complain_on_overflow */ | |
388 | bfd_elf_generic_reloc, /* special_function */ | |
389 | "R_MMIX_PC_64", /* name */ | |
b34976b6 | 390 | FALSE, /* partial_inplace */ |
930b4cb2 | 391 | 0, /* src_mask */ |
3c3bdf30 | 392 | MINUS_ONE, /* dst_mask */ |
b34976b6 | 393 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
394 | |
395 | /* GNU extension to record C++ vtable hierarchy. */ | |
396 | HOWTO (R_MMIX_GNU_VTINHERIT, /* type */ | |
397 | 0, /* rightshift */ | |
398 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
399 | 0, /* bitsize */ | |
b34976b6 | 400 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
401 | 0, /* bitpos */ |
402 | complain_overflow_dont, /* complain_on_overflow */ | |
403 | NULL, /* special_function */ | |
404 | "R_MMIX_GNU_VTINHERIT", /* name */ | |
b34976b6 | 405 | FALSE, /* partial_inplace */ |
3c3bdf30 NC |
406 | 0, /* src_mask */ |
407 | 0, /* dst_mask */ | |
b34976b6 | 408 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
409 | |
410 | /* GNU extension to record C++ vtable member usage. */ | |
411 | HOWTO (R_MMIX_GNU_VTENTRY, /* type */ | |
412 | 0, /* rightshift */ | |
413 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
414 | 0, /* bitsize */ | |
b34976b6 | 415 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
416 | 0, /* bitpos */ |
417 | complain_overflow_dont, /* complain_on_overflow */ | |
418 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
419 | "R_MMIX_GNU_VTENTRY", /* name */ | |
b34976b6 | 420 | FALSE, /* partial_inplace */ |
3c3bdf30 NC |
421 | 0, /* src_mask */ |
422 | 0, /* dst_mask */ | |
b34976b6 | 423 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
424 | |
425 | /* The GETA relocation is supposed to get any address that could | |
426 | possibly be reached by the GETA instruction. It can silently expand | |
427 | to get a 64-bit operand, but will complain if any of the two least | |
428 | significant bits are set. The howto members reflect a simple GETA. */ | |
429 | HOWTO (R_MMIX_GETA, /* type */ | |
430 | 2, /* rightshift */ | |
431 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
432 | 19, /* bitsize */ | |
b34976b6 | 433 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
434 | 0, /* bitpos */ |
435 | complain_overflow_signed, /* complain_on_overflow */ | |
436 | mmix_elf_reloc, /* special_function */ | |
437 | "R_MMIX_GETA", /* name */ | |
b34976b6 | 438 | FALSE, /* partial_inplace */ |
930b4cb2 | 439 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 440 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 441 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
442 | |
443 | HOWTO (R_MMIX_GETA_1, /* type */ | |
444 | 2, /* rightshift */ | |
445 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
446 | 19, /* bitsize */ | |
b34976b6 | 447 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
448 | 0, /* bitpos */ |
449 | complain_overflow_signed, /* complain_on_overflow */ | |
450 | mmix_elf_reloc, /* special_function */ | |
451 | "R_MMIX_GETA_1", /* name */ | |
b34976b6 | 452 | FALSE, /* partial_inplace */ |
930b4cb2 | 453 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 454 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 455 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
456 | |
457 | HOWTO (R_MMIX_GETA_2, /* type */ | |
458 | 2, /* rightshift */ | |
459 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
460 | 19, /* bitsize */ | |
b34976b6 | 461 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
462 | 0, /* bitpos */ |
463 | complain_overflow_signed, /* complain_on_overflow */ | |
464 | mmix_elf_reloc, /* special_function */ | |
465 | "R_MMIX_GETA_2", /* name */ | |
b34976b6 | 466 | FALSE, /* partial_inplace */ |
930b4cb2 | 467 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 468 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 469 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
470 | |
471 | HOWTO (R_MMIX_GETA_3, /* type */ | |
472 | 2, /* rightshift */ | |
473 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
474 | 19, /* bitsize */ | |
b34976b6 | 475 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
476 | 0, /* bitpos */ |
477 | complain_overflow_signed, /* complain_on_overflow */ | |
478 | mmix_elf_reloc, /* special_function */ | |
479 | "R_MMIX_GETA_3", /* name */ | |
b34976b6 | 480 | FALSE, /* partial_inplace */ |
930b4cb2 | 481 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 482 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 483 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
484 | |
485 | /* The conditional branches are supposed to reach any (code) address. | |
486 | It can silently expand to a 64-bit operand, but will emit an error if | |
487 | any of the two least significant bits are set. The howto members | |
488 | reflect a simple branch. */ | |
489 | HOWTO (R_MMIX_CBRANCH, /* type */ | |
490 | 2, /* rightshift */ | |
491 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
492 | 19, /* bitsize */ | |
b34976b6 | 493 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
494 | 0, /* bitpos */ |
495 | complain_overflow_signed, /* complain_on_overflow */ | |
496 | mmix_elf_reloc, /* special_function */ | |
497 | "R_MMIX_CBRANCH", /* name */ | |
b34976b6 | 498 | FALSE, /* partial_inplace */ |
930b4cb2 | 499 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 500 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 501 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
502 | |
503 | HOWTO (R_MMIX_CBRANCH_J, /* type */ | |
504 | 2, /* rightshift */ | |
505 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
506 | 19, /* bitsize */ | |
b34976b6 | 507 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
508 | 0, /* bitpos */ |
509 | complain_overflow_signed, /* complain_on_overflow */ | |
510 | mmix_elf_reloc, /* special_function */ | |
511 | "R_MMIX_CBRANCH_J", /* name */ | |
b34976b6 | 512 | FALSE, /* partial_inplace */ |
930b4cb2 | 513 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 514 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 515 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
516 | |
517 | HOWTO (R_MMIX_CBRANCH_1, /* type */ | |
518 | 2, /* rightshift */ | |
519 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
520 | 19, /* bitsize */ | |
b34976b6 | 521 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
522 | 0, /* bitpos */ |
523 | complain_overflow_signed, /* complain_on_overflow */ | |
524 | mmix_elf_reloc, /* special_function */ | |
525 | "R_MMIX_CBRANCH_1", /* name */ | |
b34976b6 | 526 | FALSE, /* partial_inplace */ |
930b4cb2 | 527 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 528 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 529 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
530 | |
531 | HOWTO (R_MMIX_CBRANCH_2, /* type */ | |
532 | 2, /* rightshift */ | |
533 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
534 | 19, /* bitsize */ | |
b34976b6 | 535 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
536 | 0, /* bitpos */ |
537 | complain_overflow_signed, /* complain_on_overflow */ | |
538 | mmix_elf_reloc, /* special_function */ | |
539 | "R_MMIX_CBRANCH_2", /* name */ | |
b34976b6 | 540 | FALSE, /* partial_inplace */ |
930b4cb2 | 541 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 542 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 543 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
544 | |
545 | HOWTO (R_MMIX_CBRANCH_3, /* type */ | |
546 | 2, /* rightshift */ | |
547 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
548 | 19, /* bitsize */ | |
b34976b6 | 549 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
550 | 0, /* bitpos */ |
551 | complain_overflow_signed, /* complain_on_overflow */ | |
552 | mmix_elf_reloc, /* special_function */ | |
553 | "R_MMIX_CBRANCH_3", /* name */ | |
b34976b6 | 554 | FALSE, /* partial_inplace */ |
930b4cb2 | 555 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 556 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 557 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
558 | |
559 | /* The PUSHJ instruction can reach any (code) address, as long as it's | |
560 | the beginning of a function (no usable restriction). It can silently | |
561 | expand to a 64-bit operand, but will emit an error if any of the two | |
f60ebe14 HPN |
562 | least significant bits are set. It can also expand into a call to a |
563 | stub; see R_MMIX_PUSHJ_STUBBABLE. The howto members reflect a simple | |
3c3bdf30 NC |
564 | PUSHJ. */ |
565 | HOWTO (R_MMIX_PUSHJ, /* type */ | |
566 | 2, /* rightshift */ | |
567 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
568 | 19, /* bitsize */ | |
b34976b6 | 569 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
570 | 0, /* bitpos */ |
571 | complain_overflow_signed, /* complain_on_overflow */ | |
572 | mmix_elf_reloc, /* special_function */ | |
573 | "R_MMIX_PUSHJ", /* name */ | |
b34976b6 | 574 | FALSE, /* partial_inplace */ |
930b4cb2 | 575 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 576 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 577 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
578 | |
579 | HOWTO (R_MMIX_PUSHJ_1, /* type */ | |
580 | 2, /* rightshift */ | |
581 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
582 | 19, /* bitsize */ | |
b34976b6 | 583 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
584 | 0, /* bitpos */ |
585 | complain_overflow_signed, /* complain_on_overflow */ | |
586 | mmix_elf_reloc, /* special_function */ | |
587 | "R_MMIX_PUSHJ_1", /* name */ | |
b34976b6 | 588 | FALSE, /* partial_inplace */ |
930b4cb2 | 589 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 590 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 591 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
592 | |
593 | HOWTO (R_MMIX_PUSHJ_2, /* type */ | |
594 | 2, /* rightshift */ | |
595 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
596 | 19, /* bitsize */ | |
b34976b6 | 597 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
598 | 0, /* bitpos */ |
599 | complain_overflow_signed, /* complain_on_overflow */ | |
600 | mmix_elf_reloc, /* special_function */ | |
601 | "R_MMIX_PUSHJ_2", /* name */ | |
b34976b6 | 602 | FALSE, /* partial_inplace */ |
930b4cb2 | 603 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 604 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 605 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
606 | |
607 | HOWTO (R_MMIX_PUSHJ_3, /* type */ | |
608 | 2, /* rightshift */ | |
609 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
610 | 19, /* bitsize */ | |
b34976b6 | 611 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
612 | 0, /* bitpos */ |
613 | complain_overflow_signed, /* complain_on_overflow */ | |
614 | mmix_elf_reloc, /* special_function */ | |
615 | "R_MMIX_PUSHJ_3", /* name */ | |
b34976b6 | 616 | FALSE, /* partial_inplace */ |
930b4cb2 | 617 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 618 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 619 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
620 | |
621 | /* A JMP is supposed to reach any (code) address. By itself, it can | |
622 | reach +-64M; the expansion can reach all 64 bits. Note that the 64M | |
623 | limit is soon reached if you link the program in wildly different | |
624 | memory segments. The howto members reflect a trivial JMP. */ | |
625 | HOWTO (R_MMIX_JMP, /* type */ | |
626 | 2, /* rightshift */ | |
627 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
628 | 27, /* bitsize */ | |
b34976b6 | 629 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
630 | 0, /* bitpos */ |
631 | complain_overflow_signed, /* complain_on_overflow */ | |
632 | mmix_elf_reloc, /* special_function */ | |
633 | "R_MMIX_JMP", /* name */ | |
b34976b6 | 634 | FALSE, /* partial_inplace */ |
930b4cb2 | 635 | ~0x1ffffff, /* src_mask */ |
3c3bdf30 | 636 | 0x1ffffff, /* dst_mask */ |
b34976b6 | 637 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
638 | |
639 | HOWTO (R_MMIX_JMP_1, /* type */ | |
640 | 2, /* rightshift */ | |
641 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
642 | 27, /* bitsize */ | |
b34976b6 | 643 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
644 | 0, /* bitpos */ |
645 | complain_overflow_signed, /* complain_on_overflow */ | |
646 | mmix_elf_reloc, /* special_function */ | |
647 | "R_MMIX_JMP_1", /* name */ | |
b34976b6 | 648 | FALSE, /* partial_inplace */ |
930b4cb2 | 649 | ~0x1ffffff, /* src_mask */ |
3c3bdf30 | 650 | 0x1ffffff, /* dst_mask */ |
b34976b6 | 651 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
652 | |
653 | HOWTO (R_MMIX_JMP_2, /* type */ | |
654 | 2, /* rightshift */ | |
655 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
656 | 27, /* bitsize */ | |
b34976b6 | 657 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
658 | 0, /* bitpos */ |
659 | complain_overflow_signed, /* complain_on_overflow */ | |
660 | mmix_elf_reloc, /* special_function */ | |
661 | "R_MMIX_JMP_2", /* name */ | |
b34976b6 | 662 | FALSE, /* partial_inplace */ |
930b4cb2 | 663 | ~0x1ffffff, /* src_mask */ |
3c3bdf30 | 664 | 0x1ffffff, /* dst_mask */ |
b34976b6 | 665 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
666 | |
667 | HOWTO (R_MMIX_JMP_3, /* type */ | |
668 | 2, /* rightshift */ | |
669 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
670 | 27, /* bitsize */ | |
b34976b6 | 671 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
672 | 0, /* bitpos */ |
673 | complain_overflow_signed, /* complain_on_overflow */ | |
674 | mmix_elf_reloc, /* special_function */ | |
675 | "R_MMIX_JMP_3", /* name */ | |
b34976b6 | 676 | FALSE, /* partial_inplace */ |
930b4cb2 | 677 | ~0x1ffffff, /* src_mask */ |
3c3bdf30 | 678 | 0x1ffffff, /* dst_mask */ |
b34976b6 | 679 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
680 | |
681 | /* When we don't emit link-time-relaxable code from the assembler, or | |
682 | when relaxation has done all it can do, these relocs are used. For | |
683 | GETA/PUSHJ/branches. */ | |
684 | HOWTO (R_MMIX_ADDR19, /* type */ | |
685 | 2, /* rightshift */ | |
686 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
687 | 19, /* bitsize */ | |
b34976b6 | 688 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
689 | 0, /* bitpos */ |
690 | complain_overflow_signed, /* complain_on_overflow */ | |
691 | mmix_elf_reloc, /* special_function */ | |
692 | "R_MMIX_ADDR19", /* name */ | |
b34976b6 | 693 | FALSE, /* partial_inplace */ |
930b4cb2 | 694 | ~0x0100ffff, /* src_mask */ |
3c3bdf30 | 695 | 0x0100ffff, /* dst_mask */ |
b34976b6 | 696 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
697 | |
698 | /* For JMP. */ | |
699 | HOWTO (R_MMIX_ADDR27, /* type */ | |
700 | 2, /* rightshift */ | |
701 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
702 | 27, /* bitsize */ | |
b34976b6 | 703 | TRUE, /* pc_relative */ |
3c3bdf30 NC |
704 | 0, /* bitpos */ |
705 | complain_overflow_signed, /* complain_on_overflow */ | |
706 | mmix_elf_reloc, /* special_function */ | |
707 | "R_MMIX_ADDR27", /* name */ | |
b34976b6 | 708 | FALSE, /* partial_inplace */ |
930b4cb2 | 709 | ~0x1ffffff, /* src_mask */ |
3c3bdf30 | 710 | 0x1ffffff, /* dst_mask */ |
b34976b6 | 711 | TRUE), /* pcrel_offset */ |
3c3bdf30 NC |
712 | |
713 | /* A general register or the value 0..255. If a value, then the | |
714 | instruction (offset -3) needs adjusting. */ | |
715 | HOWTO (R_MMIX_REG_OR_BYTE, /* type */ | |
716 | 0, /* rightshift */ | |
717 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
718 | 8, /* bitsize */ | |
b34976b6 | 719 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
720 | 0, /* bitpos */ |
721 | complain_overflow_bitfield, /* complain_on_overflow */ | |
722 | mmix_elf_reloc, /* special_function */ | |
723 | "R_MMIX_REG_OR_BYTE", /* name */ | |
b34976b6 | 724 | FALSE, /* partial_inplace */ |
930b4cb2 | 725 | 0, /* src_mask */ |
3c3bdf30 | 726 | 0xff, /* dst_mask */ |
b34976b6 | 727 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
728 | |
729 | /* A general register. */ | |
730 | HOWTO (R_MMIX_REG, /* type */ | |
731 | 0, /* rightshift */ | |
732 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
733 | 8, /* bitsize */ | |
b34976b6 | 734 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
735 | 0, /* bitpos */ |
736 | complain_overflow_bitfield, /* complain_on_overflow */ | |
737 | mmix_elf_reloc, /* special_function */ | |
738 | "R_MMIX_REG", /* name */ | |
b34976b6 | 739 | FALSE, /* partial_inplace */ |
930b4cb2 | 740 | 0, /* src_mask */ |
3c3bdf30 | 741 | 0xff, /* dst_mask */ |
b34976b6 | 742 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
743 | |
744 | /* A register plus an index, corresponding to the relocation expression. | |
745 | The sizes must correspond to the valid range of the expression, while | |
746 | the bitmasks correspond to what we store in the image. */ | |
747 | HOWTO (R_MMIX_BASE_PLUS_OFFSET, /* type */ | |
748 | 0, /* rightshift */ | |
749 | 4, /* size (0 = byte, 1 = short, 2 = long) */ | |
750 | 64, /* bitsize */ | |
b34976b6 | 751 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
752 | 0, /* bitpos */ |
753 | complain_overflow_bitfield, /* complain_on_overflow */ | |
754 | mmix_elf_reloc, /* special_function */ | |
755 | "R_MMIX_BASE_PLUS_OFFSET", /* name */ | |
b34976b6 | 756 | FALSE, /* partial_inplace */ |
930b4cb2 | 757 | 0, /* src_mask */ |
3c3bdf30 | 758 | 0xffff, /* dst_mask */ |
b34976b6 | 759 | FALSE), /* pcrel_offset */ |
3c3bdf30 NC |
760 | |
761 | /* A "magic" relocation for a LOCAL expression, asserting that the | |
762 | expression is less than the number of global registers. No actual | |
763 | modification of the contents is done. Implementing this as a | |
764 | relocation was less intrusive than e.g. putting such expressions in a | |
765 | section to discard *after* relocation. */ | |
766 | HOWTO (R_MMIX_LOCAL, /* type */ | |
767 | 0, /* rightshift */ | |
768 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
769 | 0, /* bitsize */ | |
b34976b6 | 770 | FALSE, /* pc_relative */ |
3c3bdf30 NC |
771 | 0, /* bitpos */ |
772 | complain_overflow_dont, /* complain_on_overflow */ | |
773 | mmix_elf_reloc, /* special_function */ | |
774 | "R_MMIX_LOCAL", /* name */ | |
b34976b6 | 775 | FALSE, /* partial_inplace */ |
3c3bdf30 NC |
776 | 0, /* src_mask */ |
777 | 0, /* dst_mask */ | |
b34976b6 | 778 | FALSE), /* pcrel_offset */ |
f60ebe14 HPN |
779 | |
780 | HOWTO (R_MMIX_PUSHJ_STUBBABLE, /* type */ | |
781 | 2, /* rightshift */ | |
782 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
783 | 19, /* bitsize */ | |
784 | TRUE, /* pc_relative */ | |
785 | 0, /* bitpos */ | |
786 | complain_overflow_signed, /* complain_on_overflow */ | |
787 | mmix_elf_reloc, /* special_function */ | |
788 | "R_MMIX_PUSHJ_STUBBABLE", /* name */ | |
789 | FALSE, /* partial_inplace */ | |
790 | ~0x0100ffff, /* src_mask */ | |
791 | 0x0100ffff, /* dst_mask */ | |
792 | TRUE) /* pcrel_offset */ | |
3c3bdf30 NC |
793 | }; |
794 | ||
795 | ||
796 | /* Map BFD reloc types to MMIX ELF reloc types. */ | |
797 | ||
798 | struct mmix_reloc_map | |
799 | { | |
800 | bfd_reloc_code_real_type bfd_reloc_val; | |
801 | enum elf_mmix_reloc_type elf_reloc_val; | |
802 | }; | |
803 | ||
804 | ||
805 | static const struct mmix_reloc_map mmix_reloc_map[] = | |
806 | { | |
807 | {BFD_RELOC_NONE, R_MMIX_NONE}, | |
808 | {BFD_RELOC_8, R_MMIX_8}, | |
809 | {BFD_RELOC_16, R_MMIX_16}, | |
810 | {BFD_RELOC_24, R_MMIX_24}, | |
811 | {BFD_RELOC_32, R_MMIX_32}, | |
812 | {BFD_RELOC_64, R_MMIX_64}, | |
813 | {BFD_RELOC_8_PCREL, R_MMIX_PC_8}, | |
814 | {BFD_RELOC_16_PCREL, R_MMIX_PC_16}, | |
815 | {BFD_RELOC_24_PCREL, R_MMIX_PC_24}, | |
816 | {BFD_RELOC_32_PCREL, R_MMIX_PC_32}, | |
817 | {BFD_RELOC_64_PCREL, R_MMIX_PC_64}, | |
818 | {BFD_RELOC_VTABLE_INHERIT, R_MMIX_GNU_VTINHERIT}, | |
819 | {BFD_RELOC_VTABLE_ENTRY, R_MMIX_GNU_VTENTRY}, | |
820 | {BFD_RELOC_MMIX_GETA, R_MMIX_GETA}, | |
821 | {BFD_RELOC_MMIX_CBRANCH, R_MMIX_CBRANCH}, | |
822 | {BFD_RELOC_MMIX_PUSHJ, R_MMIX_PUSHJ}, | |
823 | {BFD_RELOC_MMIX_JMP, R_MMIX_JMP}, | |
824 | {BFD_RELOC_MMIX_ADDR19, R_MMIX_ADDR19}, | |
825 | {BFD_RELOC_MMIX_ADDR27, R_MMIX_ADDR27}, | |
826 | {BFD_RELOC_MMIX_REG_OR_BYTE, R_MMIX_REG_OR_BYTE}, | |
827 | {BFD_RELOC_MMIX_REG, R_MMIX_REG}, | |
828 | {BFD_RELOC_MMIX_BASE_PLUS_OFFSET, R_MMIX_BASE_PLUS_OFFSET}, | |
f60ebe14 HPN |
829 | {BFD_RELOC_MMIX_LOCAL, R_MMIX_LOCAL}, |
830 | {BFD_RELOC_MMIX_PUSHJ_STUBBABLE, R_MMIX_PUSHJ_STUBBABLE} | |
3c3bdf30 NC |
831 | }; |
832 | ||
833 | static reloc_howto_type * | |
834 | bfd_elf64_bfd_reloc_type_lookup (abfd, code) | |
835 | bfd *abfd ATTRIBUTE_UNUSED; | |
836 | bfd_reloc_code_real_type code; | |
837 | { | |
838 | unsigned int i; | |
839 | ||
840 | for (i = 0; | |
841 | i < sizeof (mmix_reloc_map) / sizeof (mmix_reloc_map[0]); | |
842 | i++) | |
843 | { | |
844 | if (mmix_reloc_map[i].bfd_reloc_val == code) | |
845 | return &elf_mmix_howto_table[mmix_reloc_map[i].elf_reloc_val]; | |
846 | } | |
847 | ||
848 | return NULL; | |
157090f7 AM |
849 | } |
850 | ||
851 | static reloc_howto_type * | |
852 | bfd_elf64_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
853 | const char *r_name) | |
854 | { | |
855 | unsigned int i; | |
856 | ||
857 | for (i = 0; | |
858 | i < sizeof (elf_mmix_howto_table) / sizeof (elf_mmix_howto_table[0]); | |
859 | i++) | |
860 | if (elf_mmix_howto_table[i].name != NULL | |
861 | && strcasecmp (elf_mmix_howto_table[i].name, r_name) == 0) | |
862 | return &elf_mmix_howto_table[i]; | |
863 | ||
864 | return NULL; | |
3c3bdf30 NC |
865 | } |
866 | ||
f0abc2a1 AM |
867 | static bfd_boolean |
868 | mmix_elf_new_section_hook (abfd, sec) | |
869 | bfd *abfd; | |
870 | asection *sec; | |
871 | { | |
f592407e AM |
872 | if (!sec->used_by_bfd) |
873 | { | |
874 | struct _mmix_elf_section_data *sdata; | |
875 | bfd_size_type amt = sizeof (*sdata); | |
f0abc2a1 | 876 | |
f592407e AM |
877 | sdata = bfd_zalloc (abfd, amt); |
878 | if (sdata == NULL) | |
879 | return FALSE; | |
880 | sec->used_by_bfd = sdata; | |
881 | } | |
f0abc2a1 AM |
882 | |
883 | return _bfd_elf_new_section_hook (abfd, sec); | |
884 | } | |
885 | ||
3c3bdf30 NC |
886 | |
887 | /* This function performs the actual bitfiddling and sanity check for a | |
888 | final relocation. Each relocation gets its *worst*-case expansion | |
889 | in size when it arrives here; any reduction in size should have been | |
890 | caught in linker relaxation earlier. When we get here, the relocation | |
891 | looks like the smallest instruction with SWYM:s (nop:s) appended to the | |
892 | max size. We fill in those nop:s. | |
893 | ||
894 | R_MMIX_GETA: (FIXME: Relaxation should break this up in 1, 2, 3 tetra) | |
895 | GETA $N,foo | |
896 | -> | |
897 | SETL $N,foo & 0xffff | |
898 | INCML $N,(foo >> 16) & 0xffff | |
899 | INCMH $N,(foo >> 32) & 0xffff | |
900 | INCH $N,(foo >> 48) & 0xffff | |
901 | ||
902 | R_MMIX_CBRANCH: (FIXME: Relaxation should break this up, but | |
903 | condbranches needing relaxation might be rare enough to not be | |
904 | worthwhile.) | |
905 | [P]Bcc $N,foo | |
906 | -> | |
907 | [~P]B~cc $N,.+20 | |
908 | SETL $255,foo & ... | |
909 | INCML ... | |
910 | INCMH ... | |
911 | INCH ... | |
912 | GO $255,$255,0 | |
913 | ||
914 | R_MMIX_PUSHJ: (FIXME: Relaxation...) | |
915 | PUSHJ $N,foo | |
916 | -> | |
917 | SETL $255,foo & ... | |
918 | INCML ... | |
919 | INCMH ... | |
920 | INCH ... | |
921 | PUSHGO $N,$255,0 | |
922 | ||
923 | R_MMIX_JMP: (FIXME: Relaxation...) | |
924 | JMP foo | |
925 | -> | |
926 | SETL $255,foo & ... | |
927 | INCML ... | |
928 | INCMH ... | |
929 | INCH ... | |
930 | GO $255,$255,0 | |
931 | ||
932 | R_MMIX_ADDR19 and R_MMIX_ADDR27 are just filled in. */ | |
933 | ||
934 | static bfd_reloc_status_type | |
935 | mmix_elf_perform_relocation (isec, howto, datap, addr, value) | |
936 | asection *isec; | |
937 | reloc_howto_type *howto; | |
938 | PTR datap; | |
f60ebe14 | 939 | bfd_vma addr; |
3c3bdf30 NC |
940 | bfd_vma value; |
941 | { | |
942 | bfd *abfd = isec->owner; | |
943 | bfd_reloc_status_type flag = bfd_reloc_ok; | |
944 | bfd_reloc_status_type r; | |
945 | int offs = 0; | |
946 | int reg = 255; | |
947 | ||
948 | /* The worst case bits are all similar SETL/INCML/INCMH/INCH sequences. | |
949 | We handle the differences here and the common sequence later. */ | |
950 | switch (howto->type) | |
951 | { | |
952 | case R_MMIX_GETA: | |
953 | offs = 0; | |
954 | reg = bfd_get_8 (abfd, (bfd_byte *) datap + 1); | |
955 | ||
956 | /* We change to an absolute value. */ | |
957 | value += addr; | |
958 | break; | |
959 | ||
960 | case R_MMIX_CBRANCH: | |
961 | { | |
962 | int in1 = bfd_get_16 (abfd, (bfd_byte *) datap) << 16; | |
963 | ||
964 | /* Invert the condition and prediction bit, and set the offset | |
965 | to five instructions ahead. | |
966 | ||
967 | We *can* do better if we want to. If the branch is found to be | |
968 | within limits, we could leave the branch as is; there'll just | |
969 | be a bunch of NOP:s after it. But we shouldn't see this | |
970 | sequence often enough that it's worth doing it. */ | |
971 | ||
972 | bfd_put_32 (abfd, | |
973 | (((in1 ^ ((PRED_INV_BIT | COND_INV_BIT) << 24)) & ~0xffff) | |
974 | | (24/4)), | |
975 | (bfd_byte *) datap); | |
976 | ||
977 | /* Put a "GO $255,$255,0" after the common sequence. */ | |
978 | bfd_put_32 (abfd, | |
979 | ((GO_INSN_BYTE | IMM_OFFSET_BIT) << 24) | 0xffff00, | |
980 | (bfd_byte *) datap + 20); | |
981 | ||
982 | /* Common sequence starts at offset 4. */ | |
983 | offs = 4; | |
984 | ||
985 | /* We change to an absolute value. */ | |
986 | value += addr; | |
987 | } | |
988 | break; | |
989 | ||
f60ebe14 HPN |
990 | case R_MMIX_PUSHJ_STUBBABLE: |
991 | /* If the address fits, we're fine. */ | |
992 | if ((value & 3) == 0 | |
993 | /* Note rightshift 0; see R_MMIX_JMP case below. */ | |
994 | && (r = bfd_check_overflow (complain_overflow_signed, | |
995 | howto->bitsize, | |
996 | 0, | |
997 | bfd_arch_bits_per_address (abfd), | |
998 | value)) == bfd_reloc_ok) | |
999 | goto pcrel_mmix_reloc_fits; | |
1000 | else | |
1001 | { | |
1a23a9e6 | 1002 | bfd_size_type size = isec->rawsize ? isec->rawsize : isec->size; |
f60ebe14 HPN |
1003 | |
1004 | /* We have the bytes at the PUSHJ insn and need to get the | |
1005 | position for the stub. There's supposed to be room allocated | |
1006 | for the stub. */ | |
1007 | bfd_byte *stubcontents | |
f075ee0c | 1008 | = ((bfd_byte *) datap |
f60ebe14 | 1009 | - (addr - (isec->output_section->vma + isec->output_offset)) |
eea6121a | 1010 | + size |
f60ebe14 HPN |
1011 | + mmix_elf_section_data (isec)->pjs.stub_offset); |
1012 | bfd_vma stubaddr; | |
1013 | ||
1014 | /* The address doesn't fit, so redirect the PUSHJ to the | |
1015 | location of the stub. */ | |
1016 | r = mmix_elf_perform_relocation (isec, | |
1017 | &elf_mmix_howto_table | |
1018 | [R_MMIX_ADDR19], | |
1019 | datap, | |
1020 | addr, | |
1021 | isec->output_section->vma | |
1022 | + isec->output_offset | |
eea6121a | 1023 | + size |
f60ebe14 HPN |
1024 | + (mmix_elf_section_data (isec) |
1025 | ->pjs.stub_offset) | |
1026 | - addr); | |
1027 | if (r != bfd_reloc_ok) | |
1028 | return r; | |
1029 | ||
1030 | stubaddr | |
1031 | = (isec->output_section->vma | |
1032 | + isec->output_offset | |
eea6121a | 1033 | + size |
f60ebe14 HPN |
1034 | + mmix_elf_section_data (isec)->pjs.stub_offset); |
1035 | ||
1036 | /* We generate a simple JMP if that suffices, else the whole 5 | |
1037 | insn stub. */ | |
1038 | if (bfd_check_overflow (complain_overflow_signed, | |
1039 | elf_mmix_howto_table[R_MMIX_ADDR27].bitsize, | |
1040 | 0, | |
1041 | bfd_arch_bits_per_address (abfd), | |
1042 | addr + value - stubaddr) == bfd_reloc_ok) | |
1043 | { | |
1044 | bfd_put_32 (abfd, JMP_INSN_BYTE << 24, stubcontents); | |
1045 | r = mmix_elf_perform_relocation (isec, | |
1046 | &elf_mmix_howto_table | |
1047 | [R_MMIX_ADDR27], | |
1048 | stubcontents, | |
1049 | stubaddr, | |
1050 | value + addr - stubaddr); | |
1051 | mmix_elf_section_data (isec)->pjs.stub_offset += 4; | |
1052 | ||
eea6121a AM |
1053 | if (size + mmix_elf_section_data (isec)->pjs.stub_offset |
1054 | > isec->size) | |
f60ebe14 HPN |
1055 | abort (); |
1056 | ||
1057 | return r; | |
1058 | } | |
1059 | else | |
1060 | { | |
1061 | /* Put a "GO $255,0" after the common sequence. */ | |
1062 | bfd_put_32 (abfd, | |
1063 | ((GO_INSN_BYTE | IMM_OFFSET_BIT) << 24) | |
1064 | | 0xff00, (bfd_byte *) stubcontents + 16); | |
1065 | ||
1066 | /* Prepare for the general code to set the first part of the | |
1067 | linker stub, and */ | |
1068 | value += addr; | |
1069 | datap = stubcontents; | |
1070 | mmix_elf_section_data (isec)->pjs.stub_offset | |
1071 | += MAX_PUSHJ_STUB_SIZE; | |
1072 | } | |
1073 | } | |
1074 | break; | |
1075 | ||
3c3bdf30 NC |
1076 | case R_MMIX_PUSHJ: |
1077 | { | |
1078 | int inreg = bfd_get_8 (abfd, (bfd_byte *) datap + 1); | |
1079 | ||
1080 | /* Put a "PUSHGO $N,$255,0" after the common sequence. */ | |
1081 | bfd_put_32 (abfd, | |
1082 | ((PUSHGO_INSN_BYTE | IMM_OFFSET_BIT) << 24) | |
1083 | | (inreg << 16) | |
1084 | | 0xff00, | |
1085 | (bfd_byte *) datap + 16); | |
1086 | ||
1087 | /* We change to an absolute value. */ | |
1088 | value += addr; | |
1089 | } | |
1090 | break; | |
1091 | ||
1092 | case R_MMIX_JMP: | |
1093 | /* This one is a little special. If we get here on a non-relaxing | |
1094 | link, and the destination is actually in range, we don't need to | |
1095 | execute the nops. | |
1096 | If so, we fall through to the bit-fiddling relocs. | |
1097 | ||
1098 | FIXME: bfd_check_overflow seems broken; the relocation is | |
1099 | rightshifted before testing, so supply a zero rightshift. */ | |
1100 | ||
1101 | if (! ((value & 3) == 0 | |
1102 | && (r = bfd_check_overflow (complain_overflow_signed, | |
1103 | howto->bitsize, | |
1104 | 0, | |
1105 | bfd_arch_bits_per_address (abfd), | |
1106 | value)) == bfd_reloc_ok)) | |
1107 | { | |
1108 | /* If the relocation doesn't fit in a JMP, we let the NOP:s be | |
1109 | modified below, and put a "GO $255,$255,0" after the | |
1110 | address-loading sequence. */ | |
1111 | bfd_put_32 (abfd, | |
1112 | ((GO_INSN_BYTE | IMM_OFFSET_BIT) << 24) | |
1113 | | 0xffff00, | |
1114 | (bfd_byte *) datap + 16); | |
1115 | ||
1116 | /* We change to an absolute value. */ | |
1117 | value += addr; | |
1118 | break; | |
1119 | } | |
cedb70c5 | 1120 | /* FALLTHROUGH. */ |
3c3bdf30 NC |
1121 | case R_MMIX_ADDR19: |
1122 | case R_MMIX_ADDR27: | |
f60ebe14 | 1123 | pcrel_mmix_reloc_fits: |
3c3bdf30 NC |
1124 | /* These must be in range, or else we emit an error. */ |
1125 | if ((value & 3) == 0 | |
1126 | /* Note rightshift 0; see above. */ | |
1127 | && (r = bfd_check_overflow (complain_overflow_signed, | |
1128 | howto->bitsize, | |
1129 | 0, | |
1130 | bfd_arch_bits_per_address (abfd), | |
1131 | value)) == bfd_reloc_ok) | |
1132 | { | |
1133 | bfd_vma in1 | |
1134 | = bfd_get_32 (abfd, (bfd_byte *) datap); | |
1135 | bfd_vma highbit; | |
1136 | ||
1137 | if ((bfd_signed_vma) value < 0) | |
1138 | { | |
f60ebe14 | 1139 | highbit = 1 << 24; |
3c3bdf30 NC |
1140 | value += (1 << (howto->bitsize - 1)); |
1141 | } | |
1142 | else | |
1143 | highbit = 0; | |
1144 | ||
1145 | value >>= 2; | |
1146 | ||
1147 | bfd_put_32 (abfd, | |
930b4cb2 | 1148 | (in1 & howto->src_mask) |
3c3bdf30 NC |
1149 | | highbit |
1150 | | (value & howto->dst_mask), | |
1151 | (bfd_byte *) datap); | |
1152 | ||
1153 | return bfd_reloc_ok; | |
1154 | } | |
1155 | else | |
1156 | return bfd_reloc_overflow; | |
1157 | ||
930b4cb2 HPN |
1158 | case R_MMIX_BASE_PLUS_OFFSET: |
1159 | { | |
1160 | struct bpo_reloc_section_info *bpodata | |
f0abc2a1 | 1161 | = mmix_elf_section_data (isec)->bpo.reloc; |
930b4cb2 HPN |
1162 | asection *bpo_greg_section |
1163 | = bpodata->bpo_greg_section; | |
1164 | struct bpo_greg_section_info *gregdata | |
f0abc2a1 | 1165 | = mmix_elf_section_data (bpo_greg_section)->bpo.greg; |
930b4cb2 HPN |
1166 | size_t bpo_index |
1167 | = gregdata->bpo_reloc_indexes[bpodata->bpo_index++]; | |
1168 | ||
1169 | /* A consistency check: The value we now have in "relocation" must | |
1170 | be the same as the value we stored for that relocation. It | |
1171 | doesn't cost much, so can be left in at all times. */ | |
1172 | if (value != gregdata->reloc_request[bpo_index].value) | |
1173 | { | |
1174 | (*_bfd_error_handler) | |
1175 | (_("%s: Internal inconsistency error for value for\n\ | |
1176 | linker-allocated global register: linked: 0x%lx%08lx != relaxed: 0x%lx%08lx\n"), | |
1177 | bfd_get_filename (isec->owner), | |
1178 | (unsigned long) (value >> 32), (unsigned long) value, | |
1179 | (unsigned long) (gregdata->reloc_request[bpo_index].value | |
1180 | >> 32), | |
1181 | (unsigned long) gregdata->reloc_request[bpo_index].value); | |
1182 | bfd_set_error (bfd_error_bad_value); | |
1183 | return bfd_reloc_overflow; | |
1184 | } | |
1185 | ||
1186 | /* Then store the register number and offset for that register | |
1187 | into datap and datap + 1 respectively. */ | |
1188 | bfd_put_8 (abfd, | |
1189 | gregdata->reloc_request[bpo_index].regindex | |
1190 | + bpo_greg_section->output_section->vma / 8, | |
1191 | datap); | |
1192 | bfd_put_8 (abfd, | |
1193 | gregdata->reloc_request[bpo_index].offset, | |
1194 | ((unsigned char *) datap) + 1); | |
1195 | return bfd_reloc_ok; | |
1196 | } | |
1197 | ||
3c3bdf30 NC |
1198 | case R_MMIX_REG_OR_BYTE: |
1199 | case R_MMIX_REG: | |
1200 | if (value > 255) | |
1201 | return bfd_reloc_overflow; | |
1202 | bfd_put_8 (abfd, value, datap); | |
1203 | return bfd_reloc_ok; | |
1204 | ||
1205 | default: | |
1206 | BAD_CASE (howto->type); | |
1207 | } | |
1208 | ||
1209 | /* This code adds the common SETL/INCML/INCMH/INCH worst-case | |
1210 | sequence. */ | |
1211 | ||
1212 | /* Lowest two bits must be 0. We return bfd_reloc_overflow for | |
1213 | everything that looks strange. */ | |
1214 | if (value & 3) | |
1215 | flag = bfd_reloc_overflow; | |
1216 | ||
1217 | bfd_put_32 (abfd, | |
1218 | (SETL_INSN_BYTE << 24) | (value & 0xffff) | (reg << 16), | |
1219 | (bfd_byte *) datap + offs); | |
1220 | bfd_put_32 (abfd, | |
1221 | (INCML_INSN_BYTE << 24) | ((value >> 16) & 0xffff) | (reg << 16), | |
1222 | (bfd_byte *) datap + offs + 4); | |
1223 | bfd_put_32 (abfd, | |
1224 | (INCMH_INSN_BYTE << 24) | ((value >> 32) & 0xffff) | (reg << 16), | |
1225 | (bfd_byte *) datap + offs + 8); | |
1226 | bfd_put_32 (abfd, | |
1227 | (INCH_INSN_BYTE << 24) | ((value >> 48) & 0xffff) | (reg << 16), | |
1228 | (bfd_byte *) datap + offs + 12); | |
1229 | ||
1230 | return flag; | |
1231 | } | |
1232 | ||
1233 | /* Set the howto pointer for an MMIX ELF reloc (type RELA). */ | |
1234 | ||
1235 | static void | |
1236 | mmix_info_to_howto_rela (abfd, cache_ptr, dst) | |
1237 | bfd *abfd ATTRIBUTE_UNUSED; | |
1238 | arelent *cache_ptr; | |
947216bf | 1239 | Elf_Internal_Rela *dst; |
3c3bdf30 NC |
1240 | { |
1241 | unsigned int r_type; | |
1242 | ||
1243 | r_type = ELF64_R_TYPE (dst->r_info); | |
1244 | BFD_ASSERT (r_type < (unsigned int) R_MMIX_max); | |
1245 | cache_ptr->howto = &elf_mmix_howto_table[r_type]; | |
1246 | } | |
1247 | ||
1248 | /* Any MMIX-specific relocation gets here at assembly time or when linking | |
1249 | to other formats (such as mmo); this is the relocation function from | |
1250 | the reloc_table. We don't get here for final pure ELF linking. */ | |
1251 | ||
1252 | static bfd_reloc_status_type | |
1253 | mmix_elf_reloc (abfd, reloc_entry, symbol, data, input_section, | |
1254 | output_bfd, error_message) | |
1255 | bfd *abfd; | |
1256 | arelent *reloc_entry; | |
1257 | asymbol *symbol; | |
1258 | PTR data; | |
1259 | asection *input_section; | |
1260 | bfd *output_bfd; | |
1261 | char **error_message ATTRIBUTE_UNUSED; | |
1262 | { | |
1263 | bfd_vma relocation; | |
1264 | bfd_reloc_status_type r; | |
1265 | asection *reloc_target_output_section; | |
1266 | bfd_reloc_status_type flag = bfd_reloc_ok; | |
1267 | bfd_vma output_base = 0; | |
1268 | bfd_vma addr; | |
1269 | ||
1270 | r = bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data, | |
1271 | input_section, output_bfd, error_message); | |
1272 | ||
1273 | /* If that was all that was needed (i.e. this isn't a final link, only | |
1274 | some segment adjustments), we're done. */ | |
1275 | if (r != bfd_reloc_continue) | |
1276 | return r; | |
1277 | ||
1278 | if (bfd_is_und_section (symbol->section) | |
1279 | && (symbol->flags & BSF_WEAK) == 0 | |
1280 | && output_bfd == (bfd *) NULL) | |
1281 | return bfd_reloc_undefined; | |
1282 | ||
1283 | /* Is the address of the relocation really within the section? */ | |
07515404 | 1284 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
3c3bdf30 NC |
1285 | return bfd_reloc_outofrange; |
1286 | ||
4cc11e76 | 1287 | /* Work out which section the relocation is targeted at and the |
3c3bdf30 NC |
1288 | initial relocation command value. */ |
1289 | ||
1290 | /* Get symbol value. (Common symbols are special.) */ | |
1291 | if (bfd_is_com_section (symbol->section)) | |
1292 | relocation = 0; | |
1293 | else | |
1294 | relocation = symbol->value; | |
1295 | ||
1296 | reloc_target_output_section = bfd_get_output_section (symbol); | |
1297 | ||
1298 | /* Here the variable relocation holds the final address of the symbol we | |
1299 | are relocating against, plus any addend. */ | |
1300 | if (output_bfd) | |
1301 | output_base = 0; | |
1302 | else | |
1303 | output_base = reloc_target_output_section->vma; | |
1304 | ||
1305 | relocation += output_base + symbol->section->output_offset; | |
1306 | ||
1307 | /* Get position of relocation. */ | |
1308 | addr = (reloc_entry->address + input_section->output_section->vma | |
1309 | + input_section->output_offset); | |
1310 | if (output_bfd != (bfd *) NULL) | |
1311 | { | |
1312 | /* Add in supplied addend. */ | |
1313 | relocation += reloc_entry->addend; | |
1314 | ||
1315 | /* This is a partial relocation, and we want to apply the | |
1316 | relocation to the reloc entry rather than the raw data. | |
1317 | Modify the reloc inplace to reflect what we now know. */ | |
1318 | reloc_entry->addend = relocation; | |
1319 | reloc_entry->address += input_section->output_offset; | |
1320 | return flag; | |
1321 | } | |
1322 | ||
1323 | return mmix_final_link_relocate (reloc_entry->howto, input_section, | |
1324 | data, reloc_entry->address, | |
1325 | reloc_entry->addend, relocation, | |
1326 | bfd_asymbol_name (symbol), | |
1327 | reloc_target_output_section); | |
1328 | } | |
e06fcc86 | 1329 | \f |
3c3bdf30 NC |
1330 | /* Relocate an MMIX ELF section. Modified from elf32-fr30.c; look to it |
1331 | for guidance if you're thinking of copying this. */ | |
1332 | ||
b34976b6 | 1333 | static bfd_boolean |
3c3bdf30 NC |
1334 | mmix_elf_relocate_section (output_bfd, info, input_bfd, input_section, |
1335 | contents, relocs, local_syms, local_sections) | |
1336 | bfd *output_bfd ATTRIBUTE_UNUSED; | |
1337 | struct bfd_link_info *info; | |
1338 | bfd *input_bfd; | |
1339 | asection *input_section; | |
1340 | bfd_byte *contents; | |
1341 | Elf_Internal_Rela *relocs; | |
1342 | Elf_Internal_Sym *local_syms; | |
1343 | asection **local_sections; | |
1344 | { | |
1345 | Elf_Internal_Shdr *symtab_hdr; | |
1346 | struct elf_link_hash_entry **sym_hashes; | |
1347 | Elf_Internal_Rela *rel; | |
1348 | Elf_Internal_Rela *relend; | |
1a23a9e6 | 1349 | bfd_size_type size; |
f60ebe14 | 1350 | size_t pjsno = 0; |
3c3bdf30 | 1351 | |
1a23a9e6 | 1352 | size = input_section->rawsize ? input_section->rawsize : input_section->size; |
3c3bdf30 NC |
1353 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
1354 | sym_hashes = elf_sym_hashes (input_bfd); | |
1355 | relend = relocs + input_section->reloc_count; | |
1356 | ||
1a23a9e6 AM |
1357 | /* Zero the stub area before we start. */ |
1358 | if (input_section->rawsize != 0 | |
1359 | && input_section->size > input_section->rawsize) | |
1360 | memset (contents + input_section->rawsize, 0, | |
1361 | input_section->size - input_section->rawsize); | |
1362 | ||
3c3bdf30 NC |
1363 | for (rel = relocs; rel < relend; rel ++) |
1364 | { | |
1365 | reloc_howto_type *howto; | |
1366 | unsigned long r_symndx; | |
1367 | Elf_Internal_Sym *sym; | |
1368 | asection *sec; | |
1369 | struct elf_link_hash_entry *h; | |
1370 | bfd_vma relocation; | |
1371 | bfd_reloc_status_type r; | |
1372 | const char *name = NULL; | |
1373 | int r_type; | |
b34976b6 | 1374 | bfd_boolean undefined_signalled = FALSE; |
3c3bdf30 NC |
1375 | |
1376 | r_type = ELF64_R_TYPE (rel->r_info); | |
1377 | ||
1378 | if (r_type == R_MMIX_GNU_VTINHERIT | |
1379 | || r_type == R_MMIX_GNU_VTENTRY) | |
1380 | continue; | |
1381 | ||
1382 | r_symndx = ELF64_R_SYM (rel->r_info); | |
1383 | ||
ab96bf03 AM |
1384 | howto = elf_mmix_howto_table + ELF64_R_TYPE (rel->r_info); |
1385 | h = NULL; | |
1386 | sym = NULL; | |
1387 | sec = NULL; | |
1388 | ||
1389 | if (r_symndx < symtab_hdr->sh_info) | |
1390 | { | |
1391 | sym = local_syms + r_symndx; | |
1392 | sec = local_sections [r_symndx]; | |
1393 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); | |
1394 | ||
1395 | name = bfd_elf_string_from_elf_section (input_bfd, | |
1396 | symtab_hdr->sh_link, | |
1397 | sym->st_name); | |
1398 | if (name == NULL) | |
1399 | name = bfd_section_name (input_bfd, sec); | |
1400 | } | |
1401 | else | |
1402 | { | |
1403 | bfd_boolean unresolved_reloc; | |
1404 | ||
1405 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, | |
1406 | r_symndx, symtab_hdr, sym_hashes, | |
1407 | h, sec, relocation, | |
1408 | unresolved_reloc, undefined_signalled); | |
1409 | name = h->root.root.string; | |
1410 | } | |
1411 | ||
1412 | if (sec != NULL && elf_discarded_section (sec)) | |
1413 | { | |
1414 | /* For relocs against symbols from removed linkonce sections, | |
1415 | or sections discarded by a linker script, we just want the | |
1416 | section contents zeroed. Avoid any special processing. */ | |
1417 | _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); | |
1418 | rel->r_info = 0; | |
1419 | rel->r_addend = 0; | |
1420 | continue; | |
1421 | } | |
1422 | ||
1049f94e | 1423 | if (info->relocatable) |
3c3bdf30 | 1424 | { |
f60ebe14 HPN |
1425 | /* This is a relocatable link. For most relocs we don't have to |
1426 | change anything, unless the reloc is against a section | |
1427 | symbol, in which case we have to adjust according to where | |
1428 | the section symbol winds up in the output section. */ | |
ab96bf03 AM |
1429 | if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION) |
1430 | rel->r_addend += sec->output_offset; | |
3c3bdf30 | 1431 | |
f60ebe14 HPN |
1432 | /* For PUSHJ stub relocs however, we may need to change the |
1433 | reloc and the section contents, if the reloc doesn't reach | |
1434 | beyond the end of the output section and previous stubs. | |
1435 | Then we change the section contents to be a PUSHJ to the end | |
1436 | of the input section plus stubs (we can do that without using | |
1437 | a reloc), and then we change the reloc to be a R_MMIX_PUSHJ | |
1438 | at the stub location. */ | |
1439 | if (r_type == R_MMIX_PUSHJ_STUBBABLE) | |
1440 | { | |
1441 | /* We've already checked whether we need a stub; use that | |
1442 | knowledge. */ | |
1443 | if (mmix_elf_section_data (input_section)->pjs.stub_size[pjsno] | |
1444 | != 0) | |
1445 | { | |
1446 | Elf_Internal_Rela relcpy; | |
1447 | ||
1448 | if (mmix_elf_section_data (input_section) | |
1449 | ->pjs.stub_size[pjsno] != MAX_PUSHJ_STUB_SIZE) | |
1450 | abort (); | |
1451 | ||
1452 | /* There's already a PUSHJ insn there, so just fill in | |
1453 | the offset bits to the stub. */ | |
1454 | if (mmix_final_link_relocate (elf_mmix_howto_table | |
1455 | + R_MMIX_ADDR19, | |
1456 | input_section, | |
1457 | contents, | |
1458 | rel->r_offset, | |
1459 | 0, | |
1460 | input_section | |
1461 | ->output_section->vma | |
1462 | + input_section->output_offset | |
eea6121a | 1463 | + size |
f60ebe14 HPN |
1464 | + mmix_elf_section_data (input_section) |
1465 | ->pjs.stub_offset, | |
1466 | NULL, NULL) != bfd_reloc_ok) | |
1467 | return FALSE; | |
1468 | ||
1469 | /* Put a JMP insn at the stub; it goes with the | |
1470 | R_MMIX_JMP reloc. */ | |
1471 | bfd_put_32 (output_bfd, JMP_INSN_BYTE << 24, | |
1472 | contents | |
eea6121a | 1473 | + size |
f60ebe14 HPN |
1474 | + mmix_elf_section_data (input_section) |
1475 | ->pjs.stub_offset); | |
1476 | ||
1477 | /* Change the reloc to be at the stub, and to a full | |
1478 | R_MMIX_JMP reloc. */ | |
1479 | rel->r_info = ELF64_R_INFO (r_symndx, R_MMIX_JMP); | |
1480 | rel->r_offset | |
eea6121a | 1481 | = (size |
f60ebe14 HPN |
1482 | + mmix_elf_section_data (input_section) |
1483 | ->pjs.stub_offset); | |
1484 | ||
1485 | mmix_elf_section_data (input_section)->pjs.stub_offset | |
1486 | += MAX_PUSHJ_STUB_SIZE; | |
1487 | ||
1488 | /* Shift this reloc to the end of the relocs to maintain | |
1489 | the r_offset sorted reloc order. */ | |
1490 | relcpy = *rel; | |
1491 | memmove (rel, rel + 1, (char *) relend - (char *) rel); | |
1492 | relend[-1] = relcpy; | |
1493 | ||
1494 | /* Back up one reloc, or else we'd skip the next reloc | |
1495 | in turn. */ | |
1496 | rel--; | |
1497 | } | |
1498 | ||
1499 | pjsno++; | |
1500 | } | |
3c3bdf30 NC |
1501 | continue; |
1502 | } | |
1503 | ||
3c3bdf30 NC |
1504 | r = mmix_final_link_relocate (howto, input_section, |
1505 | contents, rel->r_offset, | |
1506 | rel->r_addend, relocation, name, sec); | |
1507 | ||
1508 | if (r != bfd_reloc_ok) | |
1509 | { | |
b34976b6 | 1510 | bfd_boolean check_ok = TRUE; |
3c3bdf30 NC |
1511 | const char * msg = (const char *) NULL; |
1512 | ||
1513 | switch (r) | |
1514 | { | |
1515 | case bfd_reloc_overflow: | |
1516 | check_ok = info->callbacks->reloc_overflow | |
dfeffb9f L |
1517 | (info, (h ? &h->root : NULL), name, howto->name, |
1518 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
3c3bdf30 NC |
1519 | break; |
1520 | ||
1521 | case bfd_reloc_undefined: | |
1522 | /* We may have sent this message above. */ | |
1523 | if (! undefined_signalled) | |
1524 | check_ok = info->callbacks->undefined_symbol | |
1525 | (info, name, input_bfd, input_section, rel->r_offset, | |
b34976b6 AM |
1526 | TRUE); |
1527 | undefined_signalled = TRUE; | |
3c3bdf30 NC |
1528 | break; |
1529 | ||
1530 | case bfd_reloc_outofrange: | |
1531 | msg = _("internal error: out of range error"); | |
1532 | break; | |
1533 | ||
1534 | case bfd_reloc_notsupported: | |
1535 | msg = _("internal error: unsupported relocation error"); | |
1536 | break; | |
1537 | ||
1538 | case bfd_reloc_dangerous: | |
1539 | msg = _("internal error: dangerous relocation"); | |
1540 | break; | |
1541 | ||
1542 | default: | |
1543 | msg = _("internal error: unknown error"); | |
1544 | break; | |
1545 | } | |
1546 | ||
1547 | if (msg) | |
1548 | check_ok = info->callbacks->warning | |
1549 | (info, msg, name, input_bfd, input_section, rel->r_offset); | |
1550 | ||
1551 | if (! check_ok) | |
b34976b6 | 1552 | return FALSE; |
3c3bdf30 NC |
1553 | } |
1554 | } | |
1555 | ||
b34976b6 | 1556 | return TRUE; |
3c3bdf30 | 1557 | } |
e06fcc86 | 1558 | \f |
3c3bdf30 NC |
1559 | /* Perform a single relocation. By default we use the standard BFD |
1560 | routines. A few relocs we have to do ourselves. */ | |
1561 | ||
1562 | static bfd_reloc_status_type | |
1563 | mmix_final_link_relocate (howto, input_section, contents, | |
1564 | r_offset, r_addend, relocation, symname, symsec) | |
1565 | reloc_howto_type *howto; | |
1566 | asection *input_section; | |
1567 | bfd_byte *contents; | |
1568 | bfd_vma r_offset; | |
1569 | bfd_signed_vma r_addend; | |
1570 | bfd_vma relocation; | |
1571 | const char *symname; | |
1572 | asection *symsec; | |
1573 | { | |
1574 | bfd_reloc_status_type r = bfd_reloc_ok; | |
1575 | bfd_vma addr | |
1576 | = (input_section->output_section->vma | |
1577 | + input_section->output_offset | |
1578 | + r_offset); | |
1579 | bfd_signed_vma srel | |
1580 | = (bfd_signed_vma) relocation + r_addend; | |
1581 | ||
1582 | switch (howto->type) | |
1583 | { | |
1584 | /* All these are PC-relative. */ | |
f60ebe14 | 1585 | case R_MMIX_PUSHJ_STUBBABLE: |
3c3bdf30 NC |
1586 | case R_MMIX_PUSHJ: |
1587 | case R_MMIX_CBRANCH: | |
1588 | case R_MMIX_ADDR19: | |
1589 | case R_MMIX_GETA: | |
1590 | case R_MMIX_ADDR27: | |
1591 | case R_MMIX_JMP: | |
1592 | contents += r_offset; | |
1593 | ||
1594 | srel -= (input_section->output_section->vma | |
1595 | + input_section->output_offset | |
1596 | + r_offset); | |
1597 | ||
1598 | r = mmix_elf_perform_relocation (input_section, howto, contents, | |
1599 | addr, srel); | |
1600 | break; | |
1601 | ||
930b4cb2 HPN |
1602 | case R_MMIX_BASE_PLUS_OFFSET: |
1603 | if (symsec == NULL) | |
1604 | return bfd_reloc_undefined; | |
1605 | ||
1606 | /* Check that we're not relocating against a register symbol. */ | |
1607 | if (strcmp (bfd_get_section_name (symsec->owner, symsec), | |
1608 | MMIX_REG_CONTENTS_SECTION_NAME) == 0 | |
1609 | || strcmp (bfd_get_section_name (symsec->owner, symsec), | |
1610 | MMIX_REG_SECTION_NAME) == 0) | |
1611 | { | |
1612 | /* Note: This is separated out into two messages in order | |
1613 | to ease the translation into other languages. */ | |
1614 | if (symname == NULL || *symname == 0) | |
1615 | (*_bfd_error_handler) | |
1616 | (_("%s: base-plus-offset relocation against register symbol: (unknown) in %s"), | |
1617 | bfd_get_filename (input_section->owner), | |
1618 | bfd_get_section_name (symsec->owner, symsec)); | |
1619 | else | |
1620 | (*_bfd_error_handler) | |
1621 | (_("%s: base-plus-offset relocation against register symbol: %s in %s"), | |
1622 | bfd_get_filename (input_section->owner), symname, | |
1623 | bfd_get_section_name (symsec->owner, symsec)); | |
1624 | return bfd_reloc_overflow; | |
1625 | } | |
1626 | goto do_mmix_reloc; | |
1627 | ||
3c3bdf30 NC |
1628 | case R_MMIX_REG_OR_BYTE: |
1629 | case R_MMIX_REG: | |
1630 | /* For now, we handle these alike. They must refer to an register | |
1631 | symbol, which is either relative to the register section and in | |
1632 | the range 0..255, or is in the register contents section with vma | |
1633 | regno * 8. */ | |
1634 | ||
1635 | /* FIXME: A better way to check for reg contents section? | |
1636 | FIXME: Postpone section->scaling to mmix_elf_perform_relocation? */ | |
1637 | if (symsec == NULL) | |
1638 | return bfd_reloc_undefined; | |
1639 | ||
1640 | if (strcmp (bfd_get_section_name (symsec->owner, symsec), | |
1641 | MMIX_REG_CONTENTS_SECTION_NAME) == 0) | |
1642 | { | |
1643 | if ((srel & 7) != 0 || srel < 32*8 || srel > 255*8) | |
1644 | { | |
1645 | /* The bfd_reloc_outofrange return value, though intuitively | |
1646 | a better value, will not get us an error. */ | |
1647 | return bfd_reloc_overflow; | |
1648 | } | |
1649 | srel /= 8; | |
1650 | } | |
1651 | else if (strcmp (bfd_get_section_name (symsec->owner, symsec), | |
1652 | MMIX_REG_SECTION_NAME) == 0) | |
1653 | { | |
1654 | if (srel < 0 || srel > 255) | |
1655 | /* The bfd_reloc_outofrange return value, though intuitively a | |
1656 | better value, will not get us an error. */ | |
1657 | return bfd_reloc_overflow; | |
1658 | } | |
1659 | else | |
1660 | { | |
930b4cb2 | 1661 | /* Note: This is separated out into two messages in order |
ca09e32b NC |
1662 | to ease the translation into other languages. */ |
1663 | if (symname == NULL || *symname == 0) | |
1664 | (*_bfd_error_handler) | |
1665 | (_("%s: register relocation against non-register symbol: (unknown) in %s"), | |
1666 | bfd_get_filename (input_section->owner), | |
1667 | bfd_get_section_name (symsec->owner, symsec)); | |
1668 | else | |
1669 | (*_bfd_error_handler) | |
1670 | (_("%s: register relocation against non-register symbol: %s in %s"), | |
1671 | bfd_get_filename (input_section->owner), symname, | |
1672 | bfd_get_section_name (symsec->owner, symsec)); | |
3c3bdf30 NC |
1673 | |
1674 | /* The bfd_reloc_outofrange return value, though intuitively a | |
1675 | better value, will not get us an error. */ | |
1676 | return bfd_reloc_overflow; | |
1677 | } | |
930b4cb2 | 1678 | do_mmix_reloc: |
3c3bdf30 NC |
1679 | contents += r_offset; |
1680 | r = mmix_elf_perform_relocation (input_section, howto, contents, | |
1681 | addr, srel); | |
1682 | break; | |
1683 | ||
1684 | case R_MMIX_LOCAL: | |
1685 | /* This isn't a real relocation, it's just an assertion that the | |
1686 | final relocation value corresponds to a local register. We | |
1687 | ignore the actual relocation; nothing is changed. */ | |
1688 | { | |
1689 | asection *regsec | |
1690 | = bfd_get_section_by_name (input_section->output_section->owner, | |
1691 | MMIX_REG_CONTENTS_SECTION_NAME); | |
1692 | bfd_vma first_global; | |
1693 | ||
1694 | /* Check that this is an absolute value, or a reference to the | |
1695 | register contents section or the register (symbol) section. | |
1696 | Absolute numbers can get here as undefined section. Undefined | |
1697 | symbols are signalled elsewhere, so there's no conflict in us | |
1698 | accidentally handling it. */ | |
1699 | if (!bfd_is_abs_section (symsec) | |
1700 | && !bfd_is_und_section (symsec) | |
1701 | && strcmp (bfd_get_section_name (symsec->owner, symsec), | |
1702 | MMIX_REG_CONTENTS_SECTION_NAME) != 0 | |
1703 | && strcmp (bfd_get_section_name (symsec->owner, symsec), | |
1704 | MMIX_REG_SECTION_NAME) != 0) | |
1705 | { | |
1706 | (*_bfd_error_handler) | |
1707 | (_("%s: directive LOCAL valid only with a register or absolute value"), | |
1708 | bfd_get_filename (input_section->owner)); | |
1709 | ||
1710 | return bfd_reloc_overflow; | |
1711 | } | |
1712 | ||
1713 | /* If we don't have a register contents section, then $255 is the | |
1714 | first global register. */ | |
1715 | if (regsec == NULL) | |
1716 | first_global = 255; | |
1717 | else | |
1718 | { | |
1719 | first_global = bfd_get_section_vma (abfd, regsec) / 8; | |
1720 | if (strcmp (bfd_get_section_name (symsec->owner, symsec), | |
1721 | MMIX_REG_CONTENTS_SECTION_NAME) == 0) | |
1722 | { | |
1723 | if ((srel & 7) != 0 || srel < 32*8 || srel > 255*8) | |
1724 | /* The bfd_reloc_outofrange return value, though | |
1725 | intuitively a better value, will not get us an error. */ | |
1726 | return bfd_reloc_overflow; | |
1727 | srel /= 8; | |
1728 | } | |
1729 | } | |
1730 | ||
1731 | if ((bfd_vma) srel >= first_global) | |
1732 | { | |
1733 | /* FIXME: Better error message. */ | |
1734 | (*_bfd_error_handler) | |
1735 | (_("%s: LOCAL directive: Register $%ld is not a local register. First global register is $%ld."), | |
1736 | bfd_get_filename (input_section->owner), (long) srel, (long) first_global); | |
1737 | ||
1738 | return bfd_reloc_overflow; | |
1739 | } | |
1740 | } | |
1741 | r = bfd_reloc_ok; | |
1742 | break; | |
1743 | ||
1744 | default: | |
1745 | r = _bfd_final_link_relocate (howto, input_section->owner, input_section, | |
1746 | contents, r_offset, | |
1747 | relocation, r_addend); | |
1748 | } | |
1749 | ||
1750 | return r; | |
1751 | } | |
e06fcc86 | 1752 | \f |
3c3bdf30 NC |
1753 | /* Return the section that should be marked against GC for a given |
1754 | relocation. */ | |
1755 | ||
1756 | static asection * | |
07adf181 AM |
1757 | mmix_elf_gc_mark_hook (asection *sec, |
1758 | struct bfd_link_info *info, | |
1759 | Elf_Internal_Rela *rel, | |
1760 | struct elf_link_hash_entry *h, | |
1761 | Elf_Internal_Sym *sym) | |
3c3bdf30 NC |
1762 | { |
1763 | if (h != NULL) | |
07adf181 AM |
1764 | switch (ELF64_R_TYPE (rel->r_info)) |
1765 | { | |
1766 | case R_MMIX_GNU_VTINHERIT: | |
1767 | case R_MMIX_GNU_VTENTRY: | |
1768 | return NULL; | |
1769 | } | |
3c3bdf30 | 1770 | |
07adf181 | 1771 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); |
3c3bdf30 | 1772 | } |
930b4cb2 HPN |
1773 | |
1774 | /* Update relocation info for a GC-excluded section. We could supposedly | |
1775 | perform the allocation after GC, but there's no suitable hook between | |
1776 | GC (or section merge) and the point when all input sections must be | |
1777 | present. Better to waste some memory and (perhaps) a little time. */ | |
1778 | ||
b34976b6 | 1779 | static bfd_boolean |
07adf181 AM |
1780 | mmix_elf_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED, |
1781 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
1782 | asection *sec, | |
1783 | const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED) | |
930b4cb2 HPN |
1784 | { |
1785 | struct bpo_reloc_section_info *bpodata | |
f0abc2a1 | 1786 | = mmix_elf_section_data (sec)->bpo.reloc; |
930b4cb2 HPN |
1787 | asection *allocated_gregs_section; |
1788 | ||
1789 | /* If no bpodata here, we have nothing to do. */ | |
1790 | if (bpodata == NULL) | |
b34976b6 | 1791 | return TRUE; |
930b4cb2 HPN |
1792 | |
1793 | allocated_gregs_section = bpodata->bpo_greg_section; | |
1794 | ||
f0abc2a1 | 1795 | mmix_elf_section_data (allocated_gregs_section)->bpo.greg->n_bpo_relocs |
930b4cb2 HPN |
1796 | -= bpodata->n_bpo_relocs_this_section; |
1797 | ||
b34976b6 | 1798 | return TRUE; |
930b4cb2 | 1799 | } |
e06fcc86 | 1800 | \f |
3c3bdf30 NC |
1801 | /* Sort register relocs to come before expanding relocs. */ |
1802 | ||
1803 | static int | |
1804 | mmix_elf_sort_relocs (p1, p2) | |
1805 | const PTR p1; | |
1806 | const PTR p2; | |
1807 | { | |
1808 | const Elf_Internal_Rela *r1 = (const Elf_Internal_Rela *) p1; | |
1809 | const Elf_Internal_Rela *r2 = (const Elf_Internal_Rela *) p2; | |
1810 | int r1_is_reg, r2_is_reg; | |
1811 | ||
1812 | /* Sort primarily on r_offset & ~3, so relocs are done to consecutive | |
1813 | insns. */ | |
1814 | if ((r1->r_offset & ~(bfd_vma) 3) > (r2->r_offset & ~(bfd_vma) 3)) | |
1815 | return 1; | |
1816 | else if ((r1->r_offset & ~(bfd_vma) 3) < (r2->r_offset & ~(bfd_vma) 3)) | |
1817 | return -1; | |
1818 | ||
1819 | r1_is_reg | |
1820 | = (ELF64_R_TYPE (r1->r_info) == R_MMIX_REG_OR_BYTE | |
1821 | || ELF64_R_TYPE (r1->r_info) == R_MMIX_REG); | |
1822 | r2_is_reg | |
1823 | = (ELF64_R_TYPE (r2->r_info) == R_MMIX_REG_OR_BYTE | |
1824 | || ELF64_R_TYPE (r2->r_info) == R_MMIX_REG); | |
1825 | if (r1_is_reg != r2_is_reg) | |
1826 | return r2_is_reg - r1_is_reg; | |
1827 | ||
1828 | /* Neither or both are register relocs. Then sort on full offset. */ | |
1829 | if (r1->r_offset > r2->r_offset) | |
1830 | return 1; | |
1831 | else if (r1->r_offset < r2->r_offset) | |
1832 | return -1; | |
1833 | return 0; | |
1834 | } | |
1835 | ||
930b4cb2 HPN |
1836 | /* Subset of mmix_elf_check_relocs, common to ELF and mmo linking. */ |
1837 | ||
b34976b6 | 1838 | static bfd_boolean |
930b4cb2 HPN |
1839 | mmix_elf_check_common_relocs (abfd, info, sec, relocs) |
1840 | bfd *abfd; | |
1841 | struct bfd_link_info *info; | |
1842 | asection *sec; | |
1843 | const Elf_Internal_Rela *relocs; | |
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; | |
1876 | info->base_file = (PTR) bpo_greg_owner; | |
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 |
3c3bdf30 NC |
1972 | mmix_elf_check_relocs (abfd, info, sec, relocs) |
1973 | bfd *abfd; | |
1974 | struct bfd_link_info *info; | |
1975 | asection *sec; | |
1976 | const Elf_Internal_Rela *relocs; | |
1977 | { | |
1978 | Elf_Internal_Shdr *symtab_hdr; | |
1979 | struct elf_link_hash_entry **sym_hashes, **sym_hashes_end; | |
1980 | const Elf_Internal_Rela *rel; | |
1981 | const Elf_Internal_Rela *rel_end; | |
1982 | ||
3c3bdf30 NC |
1983 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
1984 | sym_hashes = elf_sym_hashes (abfd); | |
1985 | sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf64_External_Sym); | |
1986 | if (!elf_bad_symtab (abfd)) | |
1987 | sym_hashes_end -= symtab_hdr->sh_info; | |
1988 | ||
1989 | /* First we sort the relocs so that any register relocs come before | |
1990 | expansion-relocs to the same insn. FIXME: Not done for mmo. */ | |
1991 | qsort ((PTR) relocs, sec->reloc_count, sizeof (Elf_Internal_Rela), | |
1992 | mmix_elf_sort_relocs); | |
1993 | ||
930b4cb2 HPN |
1994 | /* Do the common part. */ |
1995 | if (!mmix_elf_check_common_relocs (abfd, info, sec, relocs)) | |
b34976b6 | 1996 | return FALSE; |
930b4cb2 | 1997 | |
f60ebe14 HPN |
1998 | if (info->relocatable) |
1999 | return TRUE; | |
2000 | ||
3c3bdf30 NC |
2001 | rel_end = relocs + sec->reloc_count; |
2002 | for (rel = relocs; rel < rel_end; rel++) | |
2003 | { | |
2004 | struct elf_link_hash_entry *h; | |
2005 | unsigned long r_symndx; | |
2006 | ||
2007 | r_symndx = ELF64_R_SYM (rel->r_info); | |
2008 | if (r_symndx < symtab_hdr->sh_info) | |
2009 | h = NULL; | |
2010 | else | |
973a3492 L |
2011 | { |
2012 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
2013 | while (h->root.type == bfd_link_hash_indirect | |
2014 | || h->root.type == bfd_link_hash_warning) | |
2015 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2016 | } | |
3c3bdf30 NC |
2017 | |
2018 | switch (ELF64_R_TYPE (rel->r_info)) | |
930b4cb2 | 2019 | { |
3c3bdf30 NC |
2020 | /* This relocation describes the C++ object vtable hierarchy. |
2021 | Reconstruct it for later use during GC. */ | |
2022 | case R_MMIX_GNU_VTINHERIT: | |
c152c796 | 2023 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
b34976b6 | 2024 | return FALSE; |
3c3bdf30 NC |
2025 | break; |
2026 | ||
2027 | /* This relocation describes which C++ vtable entries are actually | |
2028 | used. Record for later use during GC. */ | |
2029 | case R_MMIX_GNU_VTENTRY: | |
c152c796 | 2030 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
b34976b6 | 2031 | return FALSE; |
3c3bdf30 | 2032 | break; |
930b4cb2 HPN |
2033 | } |
2034 | } | |
2035 | ||
b34976b6 | 2036 | return TRUE; |
930b4cb2 HPN |
2037 | } |
2038 | ||
2039 | /* Wrapper for mmix_elf_check_common_relocs, called when linking to mmo. | |
2040 | Copied from elf_link_add_object_symbols. */ | |
2041 | ||
b34976b6 | 2042 | bfd_boolean |
930b4cb2 HPN |
2043 | _bfd_mmix_check_all_relocs (abfd, info) |
2044 | bfd *abfd; | |
2045 | struct bfd_link_info *info; | |
2046 | { | |
2047 | asection *o; | |
2048 | ||
2049 | for (o = abfd->sections; o != NULL; o = o->next) | |
2050 | { | |
2051 | Elf_Internal_Rela *internal_relocs; | |
b34976b6 | 2052 | bfd_boolean ok; |
930b4cb2 HPN |
2053 | |
2054 | if ((o->flags & SEC_RELOC) == 0 | |
2055 | || o->reloc_count == 0 | |
2056 | || ((info->strip == strip_all || info->strip == strip_debugger) | |
2057 | && (o->flags & SEC_DEBUGGING) != 0) | |
2058 | || bfd_is_abs_section (o->output_section)) | |
2059 | continue; | |
2060 | ||
2061 | internal_relocs | |
45d6a902 AM |
2062 | = _bfd_elf_link_read_relocs (abfd, o, (PTR) NULL, |
2063 | (Elf_Internal_Rela *) NULL, | |
2064 | info->keep_memory); | |
930b4cb2 | 2065 | if (internal_relocs == NULL) |
b34976b6 | 2066 | return FALSE; |
930b4cb2 HPN |
2067 | |
2068 | ok = mmix_elf_check_common_relocs (abfd, info, o, internal_relocs); | |
2069 | ||
2070 | if (! info->keep_memory) | |
2071 | free (internal_relocs); | |
2072 | ||
2073 | if (! ok) | |
b34976b6 | 2074 | return FALSE; |
3c3bdf30 NC |
2075 | } |
2076 | ||
b34976b6 | 2077 | return TRUE; |
3c3bdf30 | 2078 | } |
e06fcc86 | 2079 | \f |
3c3bdf30 NC |
2080 | /* Change symbols relative to the reg contents section to instead be to |
2081 | the register section, and scale them down to correspond to the register | |
2082 | number. */ | |
2083 | ||
b34976b6 | 2084 | static bfd_boolean |
754021d0 | 2085 | mmix_elf_link_output_symbol_hook (info, name, sym, input_sec, h) |
3c3bdf30 NC |
2086 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
2087 | const char *name ATTRIBUTE_UNUSED; | |
2088 | Elf_Internal_Sym *sym; | |
2089 | asection *input_sec; | |
754021d0 | 2090 | struct elf_link_hash_entry *h ATTRIBUTE_UNUSED; |
3c3bdf30 NC |
2091 | { |
2092 | if (input_sec != NULL | |
2093 | && input_sec->name != NULL | |
2094 | && ELF_ST_TYPE (sym->st_info) != STT_SECTION | |
2095 | && strcmp (input_sec->name, MMIX_REG_CONTENTS_SECTION_NAME) == 0) | |
2096 | { | |
2097 | sym->st_value /= 8; | |
2098 | sym->st_shndx = SHN_REGISTER; | |
2099 | } | |
2100 | ||
b34976b6 | 2101 | return TRUE; |
3c3bdf30 NC |
2102 | } |
2103 | ||
2104 | /* We fake a register section that holds values that are register numbers. | |
2105 | Having a SHN_REGISTER and register section translates better to other | |
2106 | formats (e.g. mmo) than for example a STT_REGISTER attribute. | |
2107 | This section faking is based on a construct in elf32-mips.c. */ | |
2108 | static asection mmix_elf_reg_section; | |
2109 | static asymbol mmix_elf_reg_section_symbol; | |
2110 | static asymbol *mmix_elf_reg_section_symbol_ptr; | |
2111 | ||
f60ebe14 | 2112 | /* Handle the special section numbers that a symbol may use. */ |
3c3bdf30 NC |
2113 | |
2114 | void | |
2115 | mmix_elf_symbol_processing (abfd, asym) | |
2116 | bfd *abfd ATTRIBUTE_UNUSED; | |
2117 | asymbol *asym; | |
2118 | { | |
2119 | elf_symbol_type *elfsym; | |
2120 | ||
2121 | elfsym = (elf_symbol_type *) asym; | |
2122 | switch (elfsym->internal_elf_sym.st_shndx) | |
2123 | { | |
2124 | case SHN_REGISTER: | |
2125 | if (mmix_elf_reg_section.name == NULL) | |
2126 | { | |
2127 | /* Initialize the register section. */ | |
2128 | mmix_elf_reg_section.name = MMIX_REG_SECTION_NAME; | |
2129 | mmix_elf_reg_section.flags = SEC_NO_FLAGS; | |
2130 | mmix_elf_reg_section.output_section = &mmix_elf_reg_section; | |
2131 | mmix_elf_reg_section.symbol = &mmix_elf_reg_section_symbol; | |
2132 | mmix_elf_reg_section.symbol_ptr_ptr = &mmix_elf_reg_section_symbol_ptr; | |
2133 | mmix_elf_reg_section_symbol.name = MMIX_REG_SECTION_NAME; | |
2134 | mmix_elf_reg_section_symbol.flags = BSF_SECTION_SYM; | |
2135 | mmix_elf_reg_section_symbol.section = &mmix_elf_reg_section; | |
2136 | mmix_elf_reg_section_symbol_ptr = &mmix_elf_reg_section_symbol; | |
2137 | } | |
2138 | asym->section = &mmix_elf_reg_section; | |
2139 | break; | |
2140 | ||
2141 | default: | |
2142 | break; | |
2143 | } | |
2144 | } | |
2145 | ||
2146 | /* Given a BFD section, try to locate the corresponding ELF section | |
2147 | index. */ | |
2148 | ||
b34976b6 | 2149 | static bfd_boolean |
af746e92 | 2150 | mmix_elf_section_from_bfd_section (abfd, sec, retval) |
3c3bdf30 | 2151 | bfd * abfd ATTRIBUTE_UNUSED; |
3c3bdf30 NC |
2152 | asection * sec; |
2153 | int * retval; | |
2154 | { | |
2155 | if (strcmp (bfd_get_section_name (abfd, sec), MMIX_REG_SECTION_NAME) == 0) | |
2156 | *retval = SHN_REGISTER; | |
2157 | else | |
b34976b6 | 2158 | return FALSE; |
3c3bdf30 | 2159 | |
b34976b6 | 2160 | return TRUE; |
3c3bdf30 NC |
2161 | } |
2162 | ||
2163 | /* Hook called by the linker routine which adds symbols from an object | |
2164 | file. We must handle the special SHN_REGISTER section number here. | |
2165 | ||
2166 | We also check that we only have *one* each of the section-start | |
2167 | symbols, since otherwise having two with the same value would cause | |
2168 | them to be "merged", but with the contents serialized. */ | |
2169 | ||
b34976b6 | 2170 | bfd_boolean |
3c3bdf30 NC |
2171 | mmix_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp) |
2172 | bfd *abfd; | |
2173 | struct bfd_link_info *info ATTRIBUTE_UNUSED; | |
555cd476 | 2174 | Elf_Internal_Sym *sym; |
3c3bdf30 NC |
2175 | const char **namep ATTRIBUTE_UNUSED; |
2176 | flagword *flagsp ATTRIBUTE_UNUSED; | |
2177 | asection **secp; | |
2178 | bfd_vma *valp ATTRIBUTE_UNUSED; | |
2179 | { | |
2180 | if (sym->st_shndx == SHN_REGISTER) | |
46fda84e AM |
2181 | { |
2182 | *secp = bfd_make_section_old_way (abfd, MMIX_REG_SECTION_NAME); | |
2183 | (*secp)->flags |= SEC_LINKER_CREATED; | |
2184 | } | |
3c3bdf30 | 2185 | else if ((*namep)[0] == '_' && (*namep)[1] == '_' && (*namep)[2] == '.' |
0112cd26 | 2186 | && CONST_STRNEQ (*namep, MMIX_LOC_SECTION_START_SYMBOL_PREFIX)) |
3c3bdf30 NC |
2187 | { |
2188 | /* See if we have another one. */ | |
4ab82700 AM |
2189 | struct bfd_link_hash_entry *h = bfd_link_hash_lookup (info->hash, |
2190 | *namep, | |
b34976b6 AM |
2191 | FALSE, |
2192 | FALSE, | |
2193 | FALSE); | |
3c3bdf30 | 2194 | |
4ab82700 | 2195 | if (h != NULL && h->type != bfd_link_hash_undefined) |
3c3bdf30 NC |
2196 | { |
2197 | /* How do we get the asymbol (or really: the filename) from h? | |
4ab82700 | 2198 | h->u.def.section->owner is NULL. */ |
3c3bdf30 NC |
2199 | ((*_bfd_error_handler) |
2200 | (_("%s: Error: multiple definition of `%s'; start of %s is set in a earlier linked file\n"), | |
2201 | bfd_get_filename (abfd), *namep, | |
2202 | *namep + strlen (MMIX_LOC_SECTION_START_SYMBOL_PREFIX))); | |
2203 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2204 | return FALSE; |
3c3bdf30 NC |
2205 | } |
2206 | } | |
2207 | ||
b34976b6 | 2208 | return TRUE; |
3c3bdf30 NC |
2209 | } |
2210 | ||
2211 | /* We consider symbols matching "L.*:[0-9]+" to be local symbols. */ | |
2212 | ||
b34976b6 | 2213 | bfd_boolean |
3c3bdf30 NC |
2214 | mmix_elf_is_local_label_name (abfd, name) |
2215 | bfd *abfd; | |
2216 | const char *name; | |
2217 | { | |
2218 | const char *colpos; | |
2219 | int digits; | |
2220 | ||
2221 | /* Also include the default local-label definition. */ | |
2222 | if (_bfd_elf_is_local_label_name (abfd, name)) | |
b34976b6 | 2223 | return TRUE; |
3c3bdf30 NC |
2224 | |
2225 | if (*name != 'L') | |
b34976b6 | 2226 | return FALSE; |
3c3bdf30 NC |
2227 | |
2228 | /* If there's no ":", or more than one, it's not a local symbol. */ | |
2229 | colpos = strchr (name, ':'); | |
2230 | if (colpos == NULL || strchr (colpos + 1, ':') != NULL) | |
b34976b6 | 2231 | return FALSE; |
3c3bdf30 NC |
2232 | |
2233 | /* Check that there are remaining characters and that they are digits. */ | |
2234 | if (colpos[1] == 0) | |
b34976b6 | 2235 | return FALSE; |
3c3bdf30 NC |
2236 | |
2237 | digits = strspn (colpos + 1, "0123456789"); | |
2238 | return digits != 0 && colpos[1 + digits] == 0; | |
2239 | } | |
2240 | ||
2241 | /* We get rid of the register section here. */ | |
2242 | ||
b34976b6 | 2243 | bfd_boolean |
3c3bdf30 NC |
2244 | mmix_elf_final_link (abfd, info) |
2245 | bfd *abfd; | |
2246 | struct bfd_link_info *info; | |
2247 | { | |
2248 | /* We never output a register section, though we create one for | |
2249 | temporary measures. Check that nobody entered contents into it. */ | |
2250 | asection *reg_section; | |
3c3bdf30 NC |
2251 | |
2252 | reg_section = bfd_get_section_by_name (abfd, MMIX_REG_SECTION_NAME); | |
2253 | ||
2254 | if (reg_section != NULL) | |
2255 | { | |
2256 | /* FIXME: Pass error state gracefully. */ | |
2257 | if (bfd_get_section_flags (abfd, reg_section) & SEC_HAS_CONTENTS) | |
2258 | _bfd_abort (__FILE__, __LINE__, _("Register section has contents\n")); | |
2259 | ||
46fda84e AM |
2260 | /* Really remove the section, if it hasn't already been done. */ |
2261 | if (!bfd_section_removed_from_list (abfd, reg_section)) | |
2262 | { | |
2263 | bfd_section_list_remove (abfd, reg_section); | |
2264 | --abfd->section_count; | |
2265 | } | |
3c3bdf30 NC |
2266 | } |
2267 | ||
c152c796 | 2268 | if (! bfd_elf_final_link (abfd, info)) |
b34976b6 | 2269 | return FALSE; |
3c3bdf30 | 2270 | |
930b4cb2 HPN |
2271 | /* Since this section is marked SEC_LINKER_CREATED, it isn't output by |
2272 | the regular linker machinery. We do it here, like other targets with | |
2273 | special sections. */ | |
2274 | if (info->base_file != NULL) | |
2275 | { | |
2276 | asection *greg_section | |
2277 | = bfd_get_section_by_name ((bfd *) info->base_file, | |
2278 | MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME); | |
2279 | if (!bfd_set_section_contents (abfd, | |
2280 | greg_section->output_section, | |
2281 | greg_section->contents, | |
2282 | (file_ptr) greg_section->output_offset, | |
eea6121a | 2283 | greg_section->size)) |
b34976b6 | 2284 | return FALSE; |
930b4cb2 | 2285 | } |
b34976b6 | 2286 | return TRUE; |
930b4cb2 HPN |
2287 | } |
2288 | ||
f60ebe14 | 2289 | /* We need to include the maximum size of PUSHJ-stubs in the initial |
eea6121a | 2290 | section size. This is expected to shrink during linker relaxation. */ |
f60ebe14 HPN |
2291 | |
2292 | static void | |
2293 | mmix_set_relaxable_size (abfd, sec, ptr) | |
2294 | bfd *abfd ATTRIBUTE_UNUSED; | |
2295 | asection *sec; | |
2296 | void *ptr; | |
2297 | { | |
2298 | struct bfd_link_info *info = ptr; | |
2299 | ||
2300 | /* Make sure we only do this for section where we know we want this, | |
2301 | otherwise we might end up resetting the size of COMMONs. */ | |
2302 | if (mmix_elf_section_data (sec)->pjs.n_pushj_relocs == 0) | |
2303 | return; | |
2304 | ||
1a23a9e6 | 2305 | sec->rawsize = sec->size; |
eea6121a AM |
2306 | sec->size += (mmix_elf_section_data (sec)->pjs.n_pushj_relocs |
2307 | * MAX_PUSHJ_STUB_SIZE); | |
f60ebe14 HPN |
2308 | |
2309 | /* For use in relocatable link, we start with a max stubs size. See | |
2310 | mmix_elf_relax_section. */ | |
2311 | if (info->relocatable && sec->output_section) | |
2312 | mmix_elf_section_data (sec->output_section)->pjs.stubs_size_sum | |
2313 | += (mmix_elf_section_data (sec)->pjs.n_pushj_relocs | |
2314 | * MAX_PUSHJ_STUB_SIZE); | |
2315 | } | |
2316 | ||
930b4cb2 HPN |
2317 | /* Initialize stuff for the linker-generated GREGs to match |
2318 | R_MMIX_BASE_PLUS_OFFSET relocs seen by the linker. */ | |
2319 | ||
b34976b6 | 2320 | bfd_boolean |
f60ebe14 | 2321 | _bfd_mmix_before_linker_allocation (abfd, info) |
930b4cb2 HPN |
2322 | bfd *abfd ATTRIBUTE_UNUSED; |
2323 | struct bfd_link_info *info; | |
2324 | { | |
2325 | asection *bpo_gregs_section; | |
2326 | bfd *bpo_greg_owner; | |
2327 | struct bpo_greg_section_info *gregdata; | |
2328 | size_t n_gregs; | |
2329 | bfd_vma gregs_size; | |
2330 | size_t i; | |
2331 | size_t *bpo_reloc_indexes; | |
f60ebe14 HPN |
2332 | bfd *ibfd; |
2333 | ||
2334 | /* Set the initial size of sections. */ | |
2335 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
2336 | bfd_map_over_sections (ibfd, mmix_set_relaxable_size, info); | |
930b4cb2 HPN |
2337 | |
2338 | /* The bpo_greg_owner bfd is supposed to have been set by | |
2339 | mmix_elf_check_relocs when the first R_MMIX_BASE_PLUS_OFFSET is seen. | |
2340 | If there is no such object, there was no R_MMIX_BASE_PLUS_OFFSET. */ | |
2341 | bpo_greg_owner = (bfd *) info->base_file; | |
2342 | if (bpo_greg_owner == NULL) | |
b34976b6 | 2343 | return TRUE; |
930b4cb2 HPN |
2344 | |
2345 | bpo_gregs_section | |
2346 | = bfd_get_section_by_name (bpo_greg_owner, | |
2347 | MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME); | |
2348 | ||
930b4cb2 | 2349 | if (bpo_gregs_section == NULL) |
b34976b6 | 2350 | return TRUE; |
930b4cb2 HPN |
2351 | |
2352 | /* We use the target-data handle in the ELF section data. */ | |
f0abc2a1 | 2353 | gregdata = mmix_elf_section_data (bpo_gregs_section)->bpo.greg; |
930b4cb2 | 2354 | if (gregdata == NULL) |
b34976b6 | 2355 | return FALSE; |
930b4cb2 HPN |
2356 | |
2357 | n_gregs = gregdata->n_bpo_relocs; | |
2358 | gregdata->n_allocated_bpo_gregs = n_gregs; | |
2359 | ||
2360 | /* When this reaches zero during relaxation, all entries have been | |
2361 | filled in and the size of the linker gregs can be calculated. */ | |
2362 | gregdata->n_remaining_bpo_relocs_this_relaxation_round = n_gregs; | |
2363 | ||
2364 | /* Set the zeroth-order estimate for the GREGs size. */ | |
2365 | gregs_size = n_gregs * 8; | |
2366 | ||
2367 | if (!bfd_set_section_size (bpo_greg_owner, bpo_gregs_section, gregs_size)) | |
b34976b6 | 2368 | return FALSE; |
930b4cb2 HPN |
2369 | |
2370 | /* Allocate and set up the GREG arrays. They're filled in at relaxation | |
2371 | time. Note that we must use the max number ever noted for the array, | |
2372 | since the index numbers were created before GC. */ | |
2373 | gregdata->reloc_request | |
2374 | = bfd_zalloc (bpo_greg_owner, | |
2375 | sizeof (struct bpo_reloc_request) | |
2376 | * gregdata->n_max_bpo_relocs); | |
2377 | ||
2378 | gregdata->bpo_reloc_indexes | |
2379 | = bpo_reloc_indexes | |
2380 | = bfd_alloc (bpo_greg_owner, | |
2381 | gregdata->n_max_bpo_relocs | |
2382 | * sizeof (size_t)); | |
2383 | if (bpo_reloc_indexes == NULL) | |
b34976b6 | 2384 | return FALSE; |
930b4cb2 HPN |
2385 | |
2386 | /* The default order is an identity mapping. */ | |
2387 | for (i = 0; i < gregdata->n_max_bpo_relocs; i++) | |
2388 | { | |
2389 | bpo_reloc_indexes[i] = i; | |
2390 | gregdata->reloc_request[i].bpo_reloc_no = i; | |
2391 | } | |
2392 | ||
b34976b6 | 2393 | return TRUE; |
3c3bdf30 | 2394 | } |
e06fcc86 | 2395 | \f |
930b4cb2 HPN |
2396 | /* Fill in contents in the linker allocated gregs. Everything is |
2397 | calculated at this point; we just move the contents into place here. */ | |
2398 | ||
b34976b6 | 2399 | bfd_boolean |
f60ebe14 | 2400 | _bfd_mmix_after_linker_allocation (abfd, link_info) |
930b4cb2 HPN |
2401 | bfd *abfd ATTRIBUTE_UNUSED; |
2402 | struct bfd_link_info *link_info; | |
2403 | { | |
2404 | asection *bpo_gregs_section; | |
2405 | bfd *bpo_greg_owner; | |
2406 | struct bpo_greg_section_info *gregdata; | |
2407 | size_t n_gregs; | |
2408 | size_t i, j; | |
2409 | size_t lastreg; | |
2410 | bfd_byte *contents; | |
2411 | ||
2412 | /* The bpo_greg_owner bfd is supposed to have been set by mmix_elf_check_relocs | |
2413 | when the first R_MMIX_BASE_PLUS_OFFSET is seen. If there is no such | |
2414 | object, there was no R_MMIX_BASE_PLUS_OFFSET. */ | |
2415 | bpo_greg_owner = (bfd *) link_info->base_file; | |
2416 | if (bpo_greg_owner == NULL) | |
b34976b6 | 2417 | return TRUE; |
930b4cb2 HPN |
2418 | |
2419 | bpo_gregs_section | |
2420 | = bfd_get_section_by_name (bpo_greg_owner, | |
2421 | MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME); | |
2422 | ||
2423 | /* This can't happen without DSO handling. When DSOs are handled | |
2424 | without any R_MMIX_BASE_PLUS_OFFSET seen, there will be no such | |
2425 | section. */ | |
2426 | if (bpo_gregs_section == NULL) | |
b34976b6 | 2427 | return TRUE; |
930b4cb2 HPN |
2428 | |
2429 | /* We use the target-data handle in the ELF section data. */ | |
2430 | ||
f0abc2a1 | 2431 | gregdata = mmix_elf_section_data (bpo_gregs_section)->bpo.greg; |
930b4cb2 | 2432 | if (gregdata == NULL) |
b34976b6 | 2433 | return FALSE; |
930b4cb2 HPN |
2434 | |
2435 | n_gregs = gregdata->n_allocated_bpo_gregs; | |
2436 | ||
2437 | bpo_gregs_section->contents | |
eea6121a | 2438 | = contents = bfd_alloc (bpo_greg_owner, bpo_gregs_section->size); |
930b4cb2 | 2439 | if (contents == NULL) |
b34976b6 | 2440 | return FALSE; |
930b4cb2 | 2441 | |
7e799044 HPN |
2442 | /* Sanity check: If these numbers mismatch, some relocation has not been |
2443 | accounted for and the rest of gregdata is probably inconsistent. | |
2444 | It's a bug, but it's more helpful to identify it than segfaulting | |
2445 | below. */ | |
2446 | if (gregdata->n_remaining_bpo_relocs_this_relaxation_round | |
2447 | != gregdata->n_bpo_relocs) | |
2448 | { | |
2449 | (*_bfd_error_handler) | |
2450 | (_("Internal inconsistency: remaining %u != max %u.\n\ | |
2451 | Please report this bug."), | |
2452 | gregdata->n_remaining_bpo_relocs_this_relaxation_round, | |
2453 | gregdata->n_bpo_relocs); | |
b34976b6 | 2454 | return FALSE; |
7e799044 HPN |
2455 | } |
2456 | ||
930b4cb2 HPN |
2457 | for (lastreg = 255, i = 0, j = 0; j < n_gregs; i++) |
2458 | if (gregdata->reloc_request[i].regindex != lastreg) | |
2459 | { | |
2460 | bfd_put_64 (bpo_greg_owner, gregdata->reloc_request[i].value, | |
2461 | contents + j * 8); | |
2462 | lastreg = gregdata->reloc_request[i].regindex; | |
2463 | j++; | |
2464 | } | |
2465 | ||
b34976b6 | 2466 | return TRUE; |
930b4cb2 HPN |
2467 | } |
2468 | ||
2469 | /* Sort valid relocs to come before non-valid relocs, then on increasing | |
2470 | value. */ | |
2471 | ||
2472 | static int | |
2473 | bpo_reloc_request_sort_fn (p1, p2) | |
2474 | const PTR p1; | |
2475 | const PTR p2; | |
2476 | { | |
2477 | const struct bpo_reloc_request *r1 = (const struct bpo_reloc_request *) p1; | |
2478 | const struct bpo_reloc_request *r2 = (const struct bpo_reloc_request *) p2; | |
2479 | ||
2480 | /* Primary function is validity; non-valid relocs sorted after valid | |
2481 | ones. */ | |
2482 | if (r1->valid != r2->valid) | |
2483 | return r2->valid - r1->valid; | |
2484 | ||
4fa5c2a8 HPN |
2485 | /* Then sort on value. Don't simplify and return just the difference of |
2486 | the values: the upper bits of the 64-bit value would be truncated on | |
2487 | a host with 32-bit ints. */ | |
930b4cb2 | 2488 | if (r1->value != r2->value) |
4fa5c2a8 | 2489 | return r1->value > r2->value ? 1 : -1; |
930b4cb2 | 2490 | |
dfbbae4c HPN |
2491 | /* As a last re-sort, use the relocation number, so we get a stable |
2492 | sort. The *addresses* aren't stable since items are swapped during | |
2493 | sorting. It depends on the qsort implementation if this actually | |
2494 | happens. */ | |
2495 | return r1->bpo_reloc_no > r2->bpo_reloc_no | |
2496 | ? 1 : (r1->bpo_reloc_no < r2->bpo_reloc_no ? -1 : 0); | |
930b4cb2 HPN |
2497 | } |
2498 | ||
4fa5c2a8 HPN |
2499 | /* For debug use only. Dumps the global register allocations resulting |
2500 | from base-plus-offset relocs. */ | |
2501 | ||
2502 | void | |
2503 | mmix_dump_bpo_gregs (link_info, pf) | |
2504 | struct bfd_link_info *link_info; | |
2505 | bfd_error_handler_type pf; | |
2506 | { | |
2507 | bfd *bpo_greg_owner; | |
2508 | asection *bpo_gregs_section; | |
2509 | struct bpo_greg_section_info *gregdata; | |
2510 | unsigned int i; | |
2511 | ||
2512 | if (link_info == NULL || link_info->base_file == NULL) | |
2513 | return; | |
2514 | ||
2515 | bpo_greg_owner = (bfd *) link_info->base_file; | |
2516 | ||
2517 | bpo_gregs_section | |
2518 | = bfd_get_section_by_name (bpo_greg_owner, | |
2519 | MMIX_LD_ALLOCATED_REG_CONTENTS_SECTION_NAME); | |
2520 | ||
2521 | if (bpo_gregs_section == NULL) | |
2522 | return; | |
2523 | ||
f0abc2a1 | 2524 | gregdata = mmix_elf_section_data (bpo_gregs_section)->bpo.greg; |
4fa5c2a8 HPN |
2525 | if (gregdata == NULL) |
2526 | return; | |
2527 | ||
2528 | if (pf == NULL) | |
2529 | pf = _bfd_error_handler; | |
2530 | ||
2531 | /* These format strings are not translated. They are for debug purposes | |
2532 | only and never displayed to an end user. Should they escape, we | |
2533 | surely want them in original. */ | |
2534 | (*pf) (" n_bpo_relocs: %u\n n_max_bpo_relocs: %u\n n_remain...round: %u\n\ | |
2535 | n_allocated_bpo_gregs: %u\n", gregdata->n_bpo_relocs, | |
2536 | gregdata->n_max_bpo_relocs, | |
2537 | gregdata->n_remaining_bpo_relocs_this_relaxation_round, | |
2538 | gregdata->n_allocated_bpo_gregs); | |
2539 | ||
2540 | if (gregdata->reloc_request) | |
2541 | for (i = 0; i < gregdata->n_max_bpo_relocs; i++) | |
2542 | (*pf) ("%4u (%4u)/%4u#%u: 0x%08lx%08lx r: %3u o: %3u\n", | |
2543 | i, | |
cf3d882d AM |
2544 | (gregdata->bpo_reloc_indexes != NULL |
2545 | ? gregdata->bpo_reloc_indexes[i] : (size_t) -1), | |
4fa5c2a8 HPN |
2546 | gregdata->reloc_request[i].bpo_reloc_no, |
2547 | gregdata->reloc_request[i].valid, | |
2548 | ||
2549 | (unsigned long) (gregdata->reloc_request[i].value >> 32), | |
2550 | (unsigned long) gregdata->reloc_request[i].value, | |
2551 | gregdata->reloc_request[i].regindex, | |
2552 | gregdata->reloc_request[i].offset); | |
2553 | } | |
2554 | ||
930b4cb2 HPN |
2555 | /* This links all R_MMIX_BASE_PLUS_OFFSET relocs into a special array, and |
2556 | when the last such reloc is done, an index-array is sorted according to | |
2557 | the values and iterated over to produce register numbers (indexed by 0 | |
2558 | from the first allocated register number) and offsets for use in real | |
2559 | relocation. | |
2560 | ||
f60ebe14 HPN |
2561 | PUSHJ stub accounting is also done here. |
2562 | ||
930b4cb2 HPN |
2563 | Symbol- and reloc-reading infrastructure copied from elf-m10200.c. */ |
2564 | ||
b34976b6 | 2565 | static bfd_boolean |
930b4cb2 HPN |
2566 | mmix_elf_relax_section (abfd, sec, link_info, again) |
2567 | bfd *abfd; | |
2568 | asection *sec; | |
2569 | struct bfd_link_info *link_info; | |
b34976b6 | 2570 | bfd_boolean *again; |
930b4cb2 | 2571 | { |
930b4cb2 | 2572 | Elf_Internal_Shdr *symtab_hdr; |
930b4cb2 | 2573 | Elf_Internal_Rela *internal_relocs; |
930b4cb2 HPN |
2574 | Elf_Internal_Rela *irel, *irelend; |
2575 | asection *bpo_gregs_section = NULL; | |
2576 | struct bpo_greg_section_info *gregdata; | |
2577 | struct bpo_reloc_section_info *bpodata | |
f0abc2a1 | 2578 | = mmix_elf_section_data (sec)->bpo.reloc; |
f60ebe14 HPN |
2579 | /* The initialization is to quiet compiler warnings. The value is to |
2580 | spot a missing actual initialization. */ | |
2581 | size_t bpono = (size_t) -1; | |
2582 | size_t pjsno = 0; | |
930b4cb2 | 2583 | bfd *bpo_greg_owner; |
6cdc0ccc | 2584 | Elf_Internal_Sym *isymbuf = NULL; |
1a23a9e6 | 2585 | bfd_size_type size = sec->rawsize ? sec->rawsize : sec->size; |
f60ebe14 HPN |
2586 | |
2587 | mmix_elf_section_data (sec)->pjs.stubs_size_sum = 0; | |
930b4cb2 HPN |
2588 | |
2589 | /* Assume nothing changes. */ | |
b34976b6 | 2590 | *again = FALSE; |
930b4cb2 | 2591 | |
f60ebe14 HPN |
2592 | /* We don't have to do anything if this section does not have relocs, or |
2593 | if this is not a code section. */ | |
2594 | if ((sec->flags & SEC_RELOC) == 0 | |
930b4cb2 HPN |
2595 | || sec->reloc_count == 0 |
2596 | || (sec->flags & SEC_CODE) == 0 | |
2597 | || (sec->flags & SEC_LINKER_CREATED) != 0 | |
f60ebe14 HPN |
2598 | /* If no R_MMIX_BASE_PLUS_OFFSET relocs and no PUSHJ-stub relocs, |
2599 | then nothing to do. */ | |
2600 | || (bpodata == NULL | |
2601 | && mmix_elf_section_data (sec)->pjs.n_pushj_relocs == 0)) | |
b34976b6 | 2602 | return TRUE; |
930b4cb2 HPN |
2603 | |
2604 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
930b4cb2 HPN |
2605 | |
2606 | bpo_greg_owner = (bfd *) link_info->base_file; | |
930b4cb2 | 2607 | |
f60ebe14 HPN |
2608 | if (bpodata != NULL) |
2609 | { | |
2610 | bpo_gregs_section = bpodata->bpo_greg_section; | |
2611 | gregdata = mmix_elf_section_data (bpo_gregs_section)->bpo.greg; | |
2612 | bpono = bpodata->first_base_plus_offset_reloc; | |
2613 | } | |
2614 | else | |
2615 | gregdata = NULL; | |
930b4cb2 HPN |
2616 | |
2617 | /* Get a copy of the native relocations. */ | |
2618 | internal_relocs | |
45d6a902 AM |
2619 | = _bfd_elf_link_read_relocs (abfd, sec, (PTR) NULL, |
2620 | (Elf_Internal_Rela *) NULL, | |
2621 | link_info->keep_memory); | |
930b4cb2 HPN |
2622 | if (internal_relocs == NULL) |
2623 | goto error_return; | |
930b4cb2 HPN |
2624 | |
2625 | /* Walk through them looking for relaxing opportunities. */ | |
2626 | irelend = internal_relocs + sec->reloc_count; | |
2627 | for (irel = internal_relocs; irel < irelend; irel++) | |
2628 | { | |
2629 | bfd_vma symval; | |
f60ebe14 | 2630 | struct elf_link_hash_entry *h = NULL; |
930b4cb2 | 2631 | |
f60ebe14 HPN |
2632 | /* We only process two relocs. */ |
2633 | if (ELF64_R_TYPE (irel->r_info) != (int) R_MMIX_BASE_PLUS_OFFSET | |
2634 | && ELF64_R_TYPE (irel->r_info) != (int) R_MMIX_PUSHJ_STUBBABLE) | |
930b4cb2 HPN |
2635 | continue; |
2636 | ||
f60ebe14 HPN |
2637 | /* We process relocs in a distinctly different way when this is a |
2638 | relocatable link (for one, we don't look at symbols), so we avoid | |
2639 | mixing its code with that for the "normal" relaxation. */ | |
2640 | if (link_info->relocatable) | |
2641 | { | |
2642 | /* The only transformation in a relocatable link is to generate | |
2643 | a full stub at the location of the stub calculated for the | |
2644 | input section, if the relocated stub location, the end of the | |
2645 | output section plus earlier stubs, cannot be reached. Thus | |
2646 | relocatable linking can only lead to worse code, but it still | |
2647 | works. */ | |
2648 | if (ELF64_R_TYPE (irel->r_info) == R_MMIX_PUSHJ_STUBBABLE) | |
2649 | { | |
2650 | /* If we can reach the end of the output-section and beyond | |
2651 | any current stubs, then we don't need a stub for this | |
2652 | reloc. The relaxed order of output stub allocation may | |
2653 | not exactly match the straightforward order, so we always | |
2654 | assume presence of output stubs, which will allow | |
2655 | relaxation only on relocations indifferent to the | |
2656 | presence of output stub allocations for other relocations | |
2657 | and thus the order of output stub allocation. */ | |
2658 | if (bfd_check_overflow (complain_overflow_signed, | |
2659 | 19, | |
2660 | 0, | |
2661 | bfd_arch_bits_per_address (abfd), | |
2662 | /* Output-stub location. */ | |
1a23a9e6 | 2663 | sec->output_section->rawsize |
f60ebe14 HPN |
2664 | + (mmix_elf_section_data (sec |
2665 | ->output_section) | |
2666 | ->pjs.stubs_size_sum) | |
2667 | /* Location of this PUSHJ reloc. */ | |
2668 | - (sec->output_offset + irel->r_offset) | |
2669 | /* Don't count *this* stub twice. */ | |
2670 | - (mmix_elf_section_data (sec) | |
2671 | ->pjs.stub_size[pjsno] | |
2672 | + MAX_PUSHJ_STUB_SIZE)) | |
2673 | == bfd_reloc_ok) | |
2674 | mmix_elf_section_data (sec)->pjs.stub_size[pjsno] = 0; | |
2675 | ||
2676 | mmix_elf_section_data (sec)->pjs.stubs_size_sum | |
2677 | += mmix_elf_section_data (sec)->pjs.stub_size[pjsno]; | |
2678 | ||
2679 | pjsno++; | |
2680 | } | |
2681 | ||
2682 | continue; | |
2683 | } | |
2684 | ||
930b4cb2 HPN |
2685 | /* Get the value of the symbol referred to by the reloc. */ |
2686 | if (ELF64_R_SYM (irel->r_info) < symtab_hdr->sh_info) | |
2687 | { | |
2688 | /* A local symbol. */ | |
6cdc0ccc | 2689 | Elf_Internal_Sym *isym; |
930b4cb2 HPN |
2690 | asection *sym_sec; |
2691 | ||
6cdc0ccc AM |
2692 | /* Read this BFD's local symbols if we haven't already. */ |
2693 | if (isymbuf == NULL) | |
2694 | { | |
2695 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; | |
2696 | if (isymbuf == NULL) | |
2697 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
2698 | symtab_hdr->sh_info, 0, | |
2699 | NULL, NULL, NULL); | |
2700 | if (isymbuf == 0) | |
2701 | goto error_return; | |
2702 | } | |
930b4cb2 | 2703 | |
6cdc0ccc AM |
2704 | isym = isymbuf + ELF64_R_SYM (irel->r_info); |
2705 | if (isym->st_shndx == SHN_UNDEF) | |
930b4cb2 | 2706 | sym_sec = bfd_und_section_ptr; |
6cdc0ccc | 2707 | else if (isym->st_shndx == SHN_ABS) |
930b4cb2 | 2708 | sym_sec = bfd_abs_section_ptr; |
6cdc0ccc | 2709 | else if (isym->st_shndx == SHN_COMMON) |
930b4cb2 HPN |
2710 | sym_sec = bfd_com_section_ptr; |
2711 | else | |
6cdc0ccc AM |
2712 | sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx); |
2713 | symval = (isym->st_value | |
930b4cb2 HPN |
2714 | + sym_sec->output_section->vma |
2715 | + sym_sec->output_offset); | |
2716 | } | |
2717 | else | |
2718 | { | |
2719 | unsigned long indx; | |
930b4cb2 HPN |
2720 | |
2721 | /* An external symbol. */ | |
2722 | indx = ELF64_R_SYM (irel->r_info) - symtab_hdr->sh_info; | |
2723 | h = elf_sym_hashes (abfd)[indx]; | |
2724 | BFD_ASSERT (h != NULL); | |
2725 | if (h->root.type != bfd_link_hash_defined | |
2726 | && h->root.type != bfd_link_hash_defweak) | |
2727 | { | |
f60ebe14 HPN |
2728 | /* This appears to be a reference to an undefined symbol. Just |
2729 | ignore it--it will be caught by the regular reloc processing. | |
2730 | We need to keep BPO reloc accounting consistent, though | |
2731 | else we'll abort instead of emitting an error message. */ | |
2732 | if (ELF64_R_TYPE (irel->r_info) == R_MMIX_BASE_PLUS_OFFSET | |
2733 | && gregdata != NULL) | |
2734 | { | |
2735 | gregdata->n_remaining_bpo_relocs_this_relaxation_round--; | |
2736 | bpono++; | |
2737 | } | |
930b4cb2 HPN |
2738 | continue; |
2739 | } | |
2740 | ||
2741 | symval = (h->root.u.def.value | |
2742 | + h->root.u.def.section->output_section->vma | |
2743 | + h->root.u.def.section->output_offset); | |
2744 | } | |
2745 | ||
f60ebe14 HPN |
2746 | if (ELF64_R_TYPE (irel->r_info) == (int) R_MMIX_PUSHJ_STUBBABLE) |
2747 | { | |
2748 | bfd_vma value = symval + irel->r_addend; | |
2749 | bfd_vma dot | |
2750 | = (sec->output_section->vma | |
2751 | + sec->output_offset | |
2752 | + irel->r_offset); | |
2753 | bfd_vma stubaddr | |
2754 | = (sec->output_section->vma | |
2755 | + sec->output_offset | |
eea6121a | 2756 | + size |
f60ebe14 HPN |
2757 | + mmix_elf_section_data (sec)->pjs.stubs_size_sum); |
2758 | ||
2759 | if ((value & 3) == 0 | |
2760 | && bfd_check_overflow (complain_overflow_signed, | |
2761 | 19, | |
2762 | 0, | |
2763 | bfd_arch_bits_per_address (abfd), | |
2764 | value - dot | |
2765 | - (value > dot | |
2766 | ? mmix_elf_section_data (sec) | |
2767 | ->pjs.stub_size[pjsno] | |
2768 | : 0)) | |
2769 | == bfd_reloc_ok) | |
2770 | /* If the reloc fits, no stub is needed. */ | |
2771 | mmix_elf_section_data (sec)->pjs.stub_size[pjsno] = 0; | |
2772 | else | |
2773 | /* Maybe we can get away with just a JMP insn? */ | |
2774 | if ((value & 3) == 0 | |
2775 | && bfd_check_overflow (complain_overflow_signed, | |
2776 | 27, | |
2777 | 0, | |
2778 | bfd_arch_bits_per_address (abfd), | |
2779 | value - stubaddr | |
2780 | - (value > dot | |
2781 | ? mmix_elf_section_data (sec) | |
2782 | ->pjs.stub_size[pjsno] - 4 | |
2783 | : 0)) | |
2784 | == bfd_reloc_ok) | |
2785 | /* Yep, account for a stub consisting of a single JMP insn. */ | |
2786 | mmix_elf_section_data (sec)->pjs.stub_size[pjsno] = 4; | |
2787 | else | |
2788 | /* Nope, go for the full insn stub. It doesn't seem useful to | |
2789 | emit the intermediate sizes; those will only be useful for | |
2790 | a >64M program assuming contiguous code. */ | |
2791 | mmix_elf_section_data (sec)->pjs.stub_size[pjsno] | |
2792 | = MAX_PUSHJ_STUB_SIZE; | |
2793 | ||
2794 | mmix_elf_section_data (sec)->pjs.stubs_size_sum | |
2795 | += mmix_elf_section_data (sec)->pjs.stub_size[pjsno]; | |
2796 | pjsno++; | |
2797 | continue; | |
2798 | } | |
2799 | ||
2800 | /* We're looking at a R_MMIX_BASE_PLUS_OFFSET reloc. */ | |
2801 | ||
930b4cb2 HPN |
2802 | gregdata->reloc_request[gregdata->bpo_reloc_indexes[bpono]].value |
2803 | = symval + irel->r_addend; | |
b34976b6 | 2804 | gregdata->reloc_request[gregdata->bpo_reloc_indexes[bpono++]].valid = TRUE; |
930b4cb2 HPN |
2805 | gregdata->n_remaining_bpo_relocs_this_relaxation_round--; |
2806 | } | |
2807 | ||
2808 | /* Check if that was the last BPO-reloc. If so, sort the values and | |
2809 | calculate how many registers we need to cover them. Set the size of | |
2810 | the linker gregs, and if the number of registers changed, indicate | |
2811 | that we need to relax some more because we have more work to do. */ | |
f60ebe14 HPN |
2812 | if (gregdata != NULL |
2813 | && gregdata->n_remaining_bpo_relocs_this_relaxation_round == 0) | |
930b4cb2 HPN |
2814 | { |
2815 | size_t i; | |
2816 | bfd_vma prev_base; | |
2817 | size_t regindex; | |
2818 | ||
2819 | /* First, reset the remaining relocs for the next round. */ | |
2820 | gregdata->n_remaining_bpo_relocs_this_relaxation_round | |
2821 | = gregdata->n_bpo_relocs; | |
2822 | ||
2823 | qsort ((PTR) gregdata->reloc_request, | |
2824 | gregdata->n_max_bpo_relocs, | |
2825 | sizeof (struct bpo_reloc_request), | |
2826 | bpo_reloc_request_sort_fn); | |
2827 | ||
2828 | /* Recalculate indexes. When we find a change (however unlikely | |
2829 | after the initial iteration), we know we need to relax again, | |
2830 | since items in the GREG-array are sorted by increasing value and | |
2831 | stored in the relaxation phase. */ | |
2832 | for (i = 0; i < gregdata->n_max_bpo_relocs; i++) | |
2833 | if (gregdata->bpo_reloc_indexes[gregdata->reloc_request[i].bpo_reloc_no] | |
2834 | != i) | |
2835 | { | |
2836 | gregdata->bpo_reloc_indexes[gregdata->reloc_request[i].bpo_reloc_no] | |
2837 | = i; | |
b34976b6 | 2838 | *again = TRUE; |
930b4cb2 HPN |
2839 | } |
2840 | ||
2841 | /* Allocate register numbers (indexing from 0). Stop at the first | |
2842 | non-valid reloc. */ | |
2843 | for (i = 0, regindex = 0, prev_base = gregdata->reloc_request[0].value; | |
2844 | i < gregdata->n_bpo_relocs; | |
2845 | i++) | |
2846 | { | |
2847 | if (gregdata->reloc_request[i].value > prev_base + 255) | |
2848 | { | |
2849 | regindex++; | |
2850 | prev_base = gregdata->reloc_request[i].value; | |
2851 | } | |
2852 | gregdata->reloc_request[i].regindex = regindex; | |
2853 | gregdata->reloc_request[i].offset | |
2854 | = gregdata->reloc_request[i].value - prev_base; | |
2855 | } | |
2856 | ||
2857 | /* If it's not the same as the last time, we need to relax again, | |
2858 | because the size of the section has changed. I'm not sure we | |
2859 | actually need to do any adjustments since the shrinking happens | |
2860 | at the start of this section, but better safe than sorry. */ | |
2861 | if (gregdata->n_allocated_bpo_gregs != regindex + 1) | |
2862 | { | |
2863 | gregdata->n_allocated_bpo_gregs = regindex + 1; | |
b34976b6 | 2864 | *again = TRUE; |
930b4cb2 HPN |
2865 | } |
2866 | ||
eea6121a | 2867 | bpo_gregs_section->size = (regindex + 1) * 8; |
930b4cb2 HPN |
2868 | } |
2869 | ||
6cdc0ccc | 2870 | if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents) |
930b4cb2 HPN |
2871 | { |
2872 | if (! link_info->keep_memory) | |
6cdc0ccc AM |
2873 | free (isymbuf); |
2874 | else | |
930b4cb2 | 2875 | { |
6cdc0ccc AM |
2876 | /* Cache the symbols for elf_link_input_bfd. */ |
2877 | symtab_hdr->contents = (unsigned char *) isymbuf; | |
930b4cb2 HPN |
2878 | } |
2879 | } | |
2880 | ||
6cdc0ccc AM |
2881 | if (internal_relocs != NULL |
2882 | && elf_section_data (sec)->relocs != internal_relocs) | |
2883 | free (internal_relocs); | |
2884 | ||
eea6121a | 2885 | if (sec->size < size + mmix_elf_section_data (sec)->pjs.stubs_size_sum) |
f60ebe14 HPN |
2886 | abort (); |
2887 | ||
eea6121a | 2888 | if (sec->size > size + mmix_elf_section_data (sec)->pjs.stubs_size_sum) |
f60ebe14 | 2889 | { |
eea6121a | 2890 | sec->size = size + mmix_elf_section_data (sec)->pjs.stubs_size_sum; |
f60ebe14 HPN |
2891 | *again = TRUE; |
2892 | } | |
2893 | ||
b34976b6 | 2894 | return TRUE; |
930b4cb2 HPN |
2895 | |
2896 | error_return: | |
6cdc0ccc AM |
2897 | if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents) |
2898 | free (isymbuf); | |
2899 | if (internal_relocs != NULL | |
2900 | && elf_section_data (sec)->relocs != internal_relocs) | |
2901 | free (internal_relocs); | |
b34976b6 | 2902 | return FALSE; |
930b4cb2 HPN |
2903 | } |
2904 | \f | |
3c3bdf30 NC |
2905 | #define ELF_ARCH bfd_arch_mmix |
2906 | #define ELF_MACHINE_CODE EM_MMIX | |
2907 | ||
2908 | /* According to mmix-doc page 36 (paragraph 45), this should be (1LL << 48LL). | |
2909 | However, that's too much for something somewhere in the linker part of | |
2910 | BFD; perhaps the start-address has to be a non-zero multiple of this | |
2911 | number, or larger than this number. The symptom is that the linker | |
2912 | complains: "warning: allocated section `.text' not in segment". We | |
2913 | settle for 64k; the page-size used in examples is 8k. | |
2914 | #define ELF_MAXPAGESIZE 0x10000 | |
2915 | ||
2916 | Unfortunately, this causes excessive padding in the supposedly small | |
2917 | for-education programs that are the expected usage (where people would | |
2918 | inspect output). We stick to 256 bytes just to have *some* default | |
2919 | alignment. */ | |
2920 | #define ELF_MAXPAGESIZE 0x100 | |
2921 | ||
2922 | #define TARGET_BIG_SYM bfd_elf64_mmix_vec | |
2923 | #define TARGET_BIG_NAME "elf64-mmix" | |
2924 | ||
2925 | #define elf_info_to_howto_rel NULL | |
2926 | #define elf_info_to_howto mmix_info_to_howto_rela | |
2927 | #define elf_backend_relocate_section mmix_elf_relocate_section | |
2928 | #define elf_backend_gc_mark_hook mmix_elf_gc_mark_hook | |
930b4cb2 HPN |
2929 | #define elf_backend_gc_sweep_hook mmix_elf_gc_sweep_hook |
2930 | ||
3c3bdf30 NC |
2931 | #define elf_backend_link_output_symbol_hook \ |
2932 | mmix_elf_link_output_symbol_hook | |
2933 | #define elf_backend_add_symbol_hook mmix_elf_add_symbol_hook | |
2934 | ||
2935 | #define elf_backend_check_relocs mmix_elf_check_relocs | |
2936 | #define elf_backend_symbol_processing mmix_elf_symbol_processing | |
74541ad4 AM |
2937 | #define elf_backend_omit_section_dynsym \ |
2938 | ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) | |
3c3bdf30 NC |
2939 | |
2940 | #define bfd_elf64_bfd_is_local_label_name \ | |
2941 | mmix_elf_is_local_label_name | |
2942 | ||
2943 | #define elf_backend_may_use_rel_p 0 | |
2944 | #define elf_backend_may_use_rela_p 1 | |
2945 | #define elf_backend_default_use_rela_p 1 | |
2946 | ||
2947 | #define elf_backend_can_gc_sections 1 | |
2948 | #define elf_backend_section_from_bfd_section \ | |
2949 | mmix_elf_section_from_bfd_section | |
2950 | ||
f0abc2a1 | 2951 | #define bfd_elf64_new_section_hook mmix_elf_new_section_hook |
3c3bdf30 | 2952 | #define bfd_elf64_bfd_final_link mmix_elf_final_link |
930b4cb2 | 2953 | #define bfd_elf64_bfd_relax_section mmix_elf_relax_section |
3c3bdf30 NC |
2954 | |
2955 | #include "elf64-target.h" |