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e214f8db | 1 | /* LoongArch-specific support for NN-bit ELF. |
fd67aa11 | 2 | Copyright (C) 2021-2024 Free Software Foundation, Inc. |
e214f8db | 3 | Contributed by Loongson Ltd. |
4 | ||
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; see the file COPYING3. If not, | |
19 | see <http://www.gnu.org/licenses/>. */ | |
20 | ||
21 | #include "ansidecl.h" | |
22 | #include "sysdep.h" | |
23 | #include "bfd.h" | |
24 | #include "libbfd.h" | |
25 | #define ARCH_SIZE NN | |
26 | #include "elf-bfd.h" | |
27 | #include "objalloc.h" | |
28 | #include "elf/loongarch.h" | |
29 | #include "elfxx-loongarch.h" | |
1b6fccd2 | 30 | #include "opcode/loongarch.h" |
e214f8db | 31 | |
32 | static bool | |
33 | loongarch_info_to_howto_rela (bfd *abfd, arelent *cache_ptr, | |
34 | Elf_Internal_Rela *dst) | |
35 | { | |
36 | cache_ptr->howto = loongarch_elf_rtype_to_howto (abfd, | |
37 | ELFNN_R_TYPE (dst->r_info)); | |
38 | return cache_ptr->howto != NULL; | |
39 | } | |
40 | ||
41 | /* LoongArch ELF linker hash entry. */ | |
42 | struct loongarch_elf_link_hash_entry | |
43 | { | |
44 | struct elf_link_hash_entry elf; | |
45 | ||
e214f8db | 46 | #define GOT_UNKNOWN 0 |
47 | #define GOT_NORMAL 1 | |
48 | #define GOT_TLS_GD 2 | |
49 | #define GOT_TLS_IE 4 | |
50 | #define GOT_TLS_LE 8 | |
4f248d61 LC |
51 | #define GOT_TLS_GDESC 16 |
52 | ||
53 | #define GOT_TLS_GD_BOTH_P(tls_type) \ | |
54 | ((tls_type & GOT_TLS_GD) && (tls_type & GOT_TLS_GDESC)) | |
55 | #define GOT_TLS_GD_ANY_P(tls_type) \ | |
56 | ((tls_type & GOT_TLS_GD) || (tls_type & GOT_TLS_GDESC)) | |
e214f8db | 57 | char tls_type; |
58 | }; | |
59 | ||
60 | #define loongarch_elf_hash_entry(ent) \ | |
61 | ((struct loongarch_elf_link_hash_entry *) (ent)) | |
62 | ||
63 | struct _bfd_loongarch_elf_obj_tdata | |
64 | { | |
65 | struct elf_obj_tdata root; | |
66 | ||
67 | /* The tls_type for each local got entry. */ | |
68 | char *local_got_tls_type; | |
69 | }; | |
70 | ||
71 | #define _bfd_loongarch_elf_tdata(abfd) \ | |
72 | ((struct _bfd_loongarch_elf_obj_tdata *) (abfd)->tdata.any) | |
73 | ||
74 | #define _bfd_loongarch_elf_local_got_tls_type(abfd) \ | |
75 | (_bfd_loongarch_elf_tdata (abfd)->local_got_tls_type) | |
76 | ||
77 | #define _bfd_loongarch_elf_tls_type(abfd, h, symndx) \ | |
78 | (*((h) != NULL \ | |
79 | ? &loongarch_elf_hash_entry (h)->tls_type \ | |
80 | : &_bfd_loongarch_elf_local_got_tls_type (abfd)[symndx])) | |
81 | ||
82 | #define is_loongarch_elf(bfd) \ | |
83 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
84 | && elf_tdata (bfd) != NULL \ | |
85 | && elf_object_id (bfd) == LARCH_ELF_DATA) | |
86 | ||
87 | struct loongarch_elf_link_hash_table | |
88 | { | |
89 | struct elf_link_hash_table elf; | |
90 | ||
91 | /* Short-cuts to get to dynamic linker sections. */ | |
92 | asection *sdyntdata; | |
93 | ||
94 | /* Small local sym to section mapping cache. */ | |
95 | struct sym_cache sym_cache; | |
96 | ||
97 | /* Used by local STT_GNU_IFUNC symbols. */ | |
98 | htab_t loc_hash_table; | |
99 | void *loc_hash_memory; | |
100 | ||
101 | /* The max alignment of output sections. */ | |
102 | bfd_vma max_alignment; | |
1b6fccd2 | 103 | |
104 | /* The data segment phase, don't relax the section | |
105 | when it is exp_seg_relro_adjust. */ | |
106 | int *data_segment_phase; | |
e214f8db | 107 | }; |
108 | ||
109 | /* Get the LoongArch ELF linker hash table from a link_info structure. */ | |
110 | #define loongarch_elf_hash_table(p) \ | |
111 | (elf_hash_table_id (elf_hash_table (p)) == LARCH_ELF_DATA \ | |
112 | ? ((struct loongarch_elf_link_hash_table *) ((p)->hash)) \ | |
113 | : NULL) | |
114 | ||
115 | #define MINUS_ONE ((bfd_vma) 0 - 1) | |
116 | ||
117 | #define sec_addr(sec) ((sec)->output_section->vma + (sec)->output_offset) | |
118 | ||
119 | #define LARCH_ELF_LOG_WORD_BYTES (ARCH_SIZE == 32 ? 2 : 3) | |
120 | #define LARCH_ELF_WORD_BYTES (1 << LARCH_ELF_LOG_WORD_BYTES) | |
121 | ||
122 | #define PLT_HEADER_INSNS 8 | |
123 | #define PLT_HEADER_SIZE (PLT_HEADER_INSNS * 4) | |
124 | ||
125 | #define PLT_ENTRY_INSNS 4 | |
126 | #define PLT_ENTRY_SIZE (PLT_ENTRY_INSNS * 4) | |
127 | ||
128 | #define GOT_ENTRY_SIZE (LARCH_ELF_WORD_BYTES) | |
129 | ||
2bf280a8 | 130 | /* Reserve two entries of GOTPLT for ld.so, one is used for PLT |
131 | resolver _dl_runtime_resolve, the other is used for link map. */ | |
e214f8db | 132 | #define GOTPLT_HEADER_SIZE (GOT_ENTRY_SIZE * 2) |
133 | ||
134 | #define elf_backend_want_got_plt 1 | |
135 | ||
136 | #define elf_backend_plt_readonly 1 | |
137 | ||
6d13722a | 138 | #define elf_backend_want_plt_sym 1 |
e214f8db | 139 | #define elf_backend_plt_alignment 4 |
140 | #define elf_backend_can_gc_sections 1 | |
6d13722a | 141 | #define elf_backend_can_refcount 1 |
e214f8db | 142 | #define elf_backend_want_got_sym 1 |
143 | ||
144 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE * 1) | |
145 | ||
146 | #define elf_backend_want_dynrelro 1 | |
6d13722a | 147 | #define elf_backend_rela_normal 1 |
48ca1b26 | 148 | #define elf_backend_default_execstack 0 |
e214f8db | 149 | |
0e45942b LC |
150 | #define IS_LOONGARCH_TLS_TRANS_RELOC(R_TYPE) \ |
151 | ((R_TYPE) == R_LARCH_TLS_DESC_PC_HI20 \ | |
152 | || (R_TYPE) == R_LARCH_TLS_DESC_PC_LO12 \ | |
153 | || (R_TYPE) == R_LARCH_TLS_DESC_LD \ | |
154 | || (R_TYPE) == R_LARCH_TLS_DESC_CALL \ | |
155 | || (R_TYPE) == R_LARCH_TLS_IE_PC_HI20 \ | |
3898e04b LC |
156 | || (R_TYPE) == R_LARCH_TLS_IE_PC_LO12) |
157 | ||
0e45942b LC |
158 | #define IS_OUTDATED_TLS_LE_RELOC(R_TYPE) \ |
159 | ((R_TYPE) == R_LARCH_TLS_LE_HI20 \ | |
160 | || (R_TYPE) == R_LARCH_TLS_LE_LO12 \ | |
161 | || (R_TYPE) == R_LARCH_TLS_LE64_LO20 \ | |
162 | || (R_TYPE) == R_LARCH_TLS_LE64_HI12) | |
163 | ||
b67a17aa LC |
164 | /* If TLS GD/IE need dynamic relocations, INDX will be the dynamic indx, |
165 | and set NEED_RELOC to true used in allocate_dynrelocs and | |
166 | loongarch_elf_relocate_section for TLS GD/IE. */ | |
167 | #define LARCH_TLS_GD_IE_NEED_DYN_RELOC(INFO, DYN, H, INDX, NEED_RELOC) \ | |
168 | do \ | |
169 | { \ | |
170 | if ((H) != NULL \ | |
171 | && (H)->dynindx != -1 \ | |
172 | && WILL_CALL_FINISH_DYNAMIC_SYMBOL ((DYN), \ | |
173 | bfd_link_pic (INFO), (H))) \ | |
174 | (INDX) = (H)->dynindx; \ | |
175 | if (((H) == NULL \ | |
176 | || ELF_ST_VISIBILITY ((H)->other) == STV_DEFAULT \ | |
177 | || (H)->root.type != bfd_link_hash_undefweak) \ | |
178 | && (!bfd_link_executable (INFO) \ | |
179 | || (INDX) != 0)) \ | |
180 | (NEED_RELOC) = true; \ | |
181 | } \ | |
182 | while (0) | |
183 | ||
184 | ||
e214f8db | 185 | /* Generate a PLT header. */ |
186 | ||
187 | static bool | |
188 | loongarch_make_plt_header (bfd_vma got_plt_addr, bfd_vma plt_header_addr, | |
189 | uint32_t *entry) | |
190 | { | |
191 | bfd_vma pcrel = got_plt_addr - plt_header_addr; | |
192 | bfd_vma hi, lo; | |
193 | ||
194 | if (pcrel + 0x80000800 > 0xffffffff) | |
195 | { | |
196 | _bfd_error_handler (_("%#" PRIx64 " invaild imm"), (uint64_t) pcrel); | |
197 | bfd_set_error (bfd_error_bad_value); | |
198 | return false; | |
199 | } | |
200 | hi = ((pcrel + 0x800) >> 12) & 0xfffff; | |
201 | lo = pcrel & 0xfff; | |
202 | ||
203 | /* pcaddu12i $t2, %hi(%pcrel(.got.plt)) | |
204 | sub.[wd] $t1, $t1, $t3 | |
205 | ld.[wd] $t3, $t2, %lo(%pcrel(.got.plt)) # _dl_runtime_resolve | |
206 | addi.[wd] $t1, $t1, -(PLT_HEADER_SIZE + 12) | |
207 | addi.[wd] $t0, $t2, %lo(%pcrel(.got.plt)) | |
208 | srli.[wd] $t1, $t1, log2(16 / GOT_ENTRY_SIZE) | |
209 | ld.[wd] $t0, $t0, GOT_ENTRY_SIZE | |
210 | jirl $r0, $t3, 0 */ | |
211 | ||
212 | if (GOT_ENTRY_SIZE == 8) | |
213 | { | |
214 | entry[0] = 0x1c00000e | (hi & 0xfffff) << 5; | |
215 | entry[1] = 0x0011bdad; | |
216 | entry[2] = 0x28c001cf | (lo & 0xfff) << 10; | |
217 | entry[3] = 0x02c001ad | ((-(PLT_HEADER_SIZE + 12)) & 0xfff) << 10; | |
218 | entry[4] = 0x02c001cc | (lo & 0xfff) << 10; | |
219 | entry[5] = 0x004501ad | (4 - LARCH_ELF_LOG_WORD_BYTES) << 10; | |
220 | entry[6] = 0x28c0018c | GOT_ENTRY_SIZE << 10; | |
221 | entry[7] = 0x4c0001e0; | |
222 | } | |
223 | else | |
224 | { | |
225 | entry[0] = 0x1c00000e | (hi & 0xfffff) << 5; | |
226 | entry[1] = 0x00113dad; | |
227 | entry[2] = 0x288001cf | (lo & 0xfff) << 10; | |
228 | entry[3] = 0x028001ad | ((-(PLT_HEADER_SIZE + 12)) & 0xfff) << 10; | |
229 | entry[4] = 0x028001cc | (lo & 0xfff) << 10; | |
230 | entry[5] = 0x004481ad | (4 - LARCH_ELF_LOG_WORD_BYTES) << 10; | |
231 | entry[6] = 0x2880018c | GOT_ENTRY_SIZE << 10; | |
232 | entry[7] = 0x4c0001e0; | |
233 | } | |
234 | return true; | |
235 | } | |
236 | ||
237 | /* Generate a PLT entry. */ | |
238 | ||
239 | static bool | |
240 | loongarch_make_plt_entry (bfd_vma got_plt_entry_addr, bfd_vma plt_entry_addr, | |
241 | uint32_t *entry) | |
242 | { | |
243 | bfd_vma pcrel = got_plt_entry_addr - plt_entry_addr; | |
244 | bfd_vma hi, lo; | |
245 | ||
246 | if (pcrel + 0x80000800 > 0xffffffff) | |
247 | { | |
248 | _bfd_error_handler (_("%#" PRIx64 " invaild imm"), (uint64_t) pcrel); | |
249 | bfd_set_error (bfd_error_bad_value); | |
250 | return false; | |
251 | } | |
252 | hi = ((pcrel + 0x800) >> 12) & 0xfffff; | |
253 | lo = pcrel & 0xfff; | |
254 | ||
255 | entry[0] = 0x1c00000f | (hi & 0xfffff) << 5; | |
256 | entry[1] = ((GOT_ENTRY_SIZE == 8 ? 0x28c001ef : 0x288001ef) | |
257 | | (lo & 0xfff) << 10); | |
258 | entry[2] = 0x4c0001ed; /* jirl $r13, $15, 0 */ | |
259 | entry[3] = 0x03400000; /* nop */ | |
260 | ||
261 | return true; | |
262 | } | |
263 | ||
264 | /* Create an entry in an LoongArch ELF linker hash table. */ | |
265 | ||
266 | static struct bfd_hash_entry * | |
267 | link_hash_newfunc (struct bfd_hash_entry *entry, struct bfd_hash_table *table, | |
268 | const char *string) | |
269 | { | |
270 | struct loongarch_elf_link_hash_entry *eh; | |
271 | ||
272 | /* Allocate the structure if it has not already been allocated by a | |
273 | subclass. */ | |
274 | if (entry == NULL) | |
275 | { | |
276 | entry = bfd_hash_allocate (table, sizeof (*eh)); | |
277 | if (entry == NULL) | |
278 | return entry; | |
279 | } | |
280 | ||
281 | /* Call the allocation method of the superclass. */ | |
282 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); | |
283 | if (entry != NULL) | |
284 | { | |
285 | eh = (struct loongarch_elf_link_hash_entry *) entry; | |
e214f8db | 286 | eh->tls_type = GOT_UNKNOWN; |
287 | } | |
288 | ||
289 | return entry; | |
290 | } | |
291 | ||
292 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry | |
293 | for local symbol so that we can handle local STT_GNU_IFUNC symbols | |
294 | as global symbol. We reuse indx and dynstr_index for local symbol | |
295 | hash since they aren't used by global symbols in this backend. */ | |
296 | ||
297 | static hashval_t | |
298 | elfNN_loongarch_local_htab_hash (const void *ptr) | |
299 | { | |
300 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) ptr; | |
301 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); | |
302 | } | |
303 | ||
304 | /* Compare local hash entries. */ | |
305 | ||
306 | static int | |
307 | elfNN_loongarch_local_htab_eq (const void *ptr1, const void *ptr2) | |
308 | { | |
309 | struct elf_link_hash_entry *h1 = (struct elf_link_hash_entry *) ptr1; | |
310 | struct elf_link_hash_entry *h2 = (struct elf_link_hash_entry *) ptr2; | |
311 | ||
312 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
313 | } | |
314 | ||
315 | /* Find and/or create a hash entry for local symbol. */ | |
316 | static struct elf_link_hash_entry * | |
317 | elfNN_loongarch_get_local_sym_hash (struct loongarch_elf_link_hash_table *htab, | |
318 | bfd *abfd, const Elf_Internal_Rela *rel, | |
319 | bool create) | |
320 | { | |
321 | struct loongarch_elf_link_hash_entry e, *ret; | |
322 | asection *sec = abfd->sections; | |
323 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, ELFNN_R_SYM (rel->r_info)); | |
324 | void **slot; | |
325 | ||
326 | e.elf.indx = sec->id; | |
327 | e.elf.dynstr_index = ELFNN_R_SYM (rel->r_info); | |
328 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, | |
329 | create ? INSERT : NO_INSERT); | |
330 | ||
331 | if (!slot) | |
332 | return NULL; | |
333 | ||
334 | if (*slot) | |
335 | { | |
336 | ret = (struct loongarch_elf_link_hash_entry *) *slot; | |
337 | return &ret->elf; | |
338 | } | |
339 | ||
340 | ret = ((struct loongarch_elf_link_hash_entry *) | |
341 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, | |
342 | sizeof (struct loongarch_elf_link_hash_entry))); | |
343 | if (ret) | |
344 | { | |
345 | memset (ret, 0, sizeof (*ret)); | |
346 | ret->elf.indx = sec->id; | |
347 | ret->elf.pointer_equality_needed = 0; | |
348 | ret->elf.dynstr_index = ELFNN_R_SYM (rel->r_info); | |
349 | ret->elf.dynindx = -1; | |
350 | ret->elf.needs_plt = 0; | |
351 | ret->elf.plt.refcount = -1; | |
352 | ret->elf.got.refcount = -1; | |
353 | ret->elf.def_dynamic = 0; | |
354 | ret->elf.def_regular = 1; | |
355 | ret->elf.ref_dynamic = 0; /* This should be always 0 for local. */ | |
356 | ret->elf.ref_regular = 0; | |
357 | ret->elf.forced_local = 1; | |
358 | ret->elf.root.type = bfd_link_hash_defined; | |
359 | *slot = ret; | |
360 | } | |
361 | return &ret->elf; | |
362 | } | |
363 | ||
364 | /* Destroy an LoongArch elf linker hash table. */ | |
365 | ||
366 | static void | |
367 | elfNN_loongarch_link_hash_table_free (bfd *obfd) | |
368 | { | |
369 | struct loongarch_elf_link_hash_table *ret; | |
370 | ret = (struct loongarch_elf_link_hash_table *) obfd->link.hash; | |
371 | ||
372 | if (ret->loc_hash_table) | |
373 | htab_delete (ret->loc_hash_table); | |
374 | if (ret->loc_hash_memory) | |
375 | objalloc_free ((struct objalloc *) ret->loc_hash_memory); | |
376 | ||
377 | _bfd_elf_link_hash_table_free (obfd); | |
378 | } | |
379 | ||
380 | /* Create a LoongArch ELF linker hash table. */ | |
381 | ||
382 | static struct bfd_link_hash_table * | |
383 | loongarch_elf_link_hash_table_create (bfd *abfd) | |
384 | { | |
385 | struct loongarch_elf_link_hash_table *ret; | |
386 | bfd_size_type amt = sizeof (struct loongarch_elf_link_hash_table); | |
387 | ||
388 | ret = (struct loongarch_elf_link_hash_table *) bfd_zmalloc (amt); | |
389 | if (ret == NULL) | |
390 | return NULL; | |
391 | ||
392 | if (!_bfd_elf_link_hash_table_init | |
393 | (&ret->elf, abfd, link_hash_newfunc, | |
394 | sizeof (struct loongarch_elf_link_hash_entry), LARCH_ELF_DATA)) | |
395 | { | |
396 | free (ret); | |
397 | return NULL; | |
398 | } | |
399 | ||
400 | ret->max_alignment = MINUS_ONE; | |
401 | ||
402 | ret->loc_hash_table = htab_try_create (1024, elfNN_loongarch_local_htab_hash, | |
403 | elfNN_loongarch_local_htab_eq, NULL); | |
404 | ret->loc_hash_memory = objalloc_create (); | |
405 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
406 | { | |
407 | elfNN_loongarch_link_hash_table_free (abfd); | |
408 | return NULL; | |
409 | } | |
410 | ret->elf.root.hash_table_free = elfNN_loongarch_link_hash_table_free; | |
411 | ||
412 | return &ret->elf.root; | |
413 | } | |
414 | ||
415 | /* Merge backend specific data from an object file to the output | |
416 | object file when linking. */ | |
417 | ||
418 | static bool | |
419 | elfNN_loongarch_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) | |
420 | { | |
421 | bfd *obfd = info->output_bfd; | |
422 | flagword in_flags = elf_elfheader (ibfd)->e_flags; | |
423 | flagword out_flags = elf_elfheader (obfd)->e_flags; | |
424 | ||
425 | if (!is_loongarch_elf (ibfd) || !is_loongarch_elf (obfd)) | |
426 | return true; | |
427 | ||
428 | if (strcmp (bfd_get_target (ibfd), bfd_get_target (obfd)) != 0) | |
429 | { | |
430 | _bfd_error_handler (_("%pB: ABI is incompatible with that of " | |
431 | "the selected emulation:\n" | |
432 | " target emulation `%s' does not match `%s'"), | |
433 | ibfd, bfd_get_target (ibfd), bfd_get_target (obfd)); | |
434 | return false; | |
435 | } | |
436 | ||
437 | if (!_bfd_elf_merge_object_attributes (ibfd, info)) | |
438 | return false; | |
439 | ||
83c5f3ae XR |
440 | /* If the input BFD is not a dynamic object and it does not contain any |
441 | non-data sections, do not account its ABI. For example, various | |
442 | packages produces such data-only relocatable objects with | |
443 | `ld -r -b binary` or `objcopy`, and these objects have zero e_flags. | |
444 | But they are compatible with all ABIs. */ | |
445 | if (!(ibfd->flags & DYNAMIC)) | |
446 | { | |
447 | asection *sec; | |
448 | bool have_code_sections = false; | |
449 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) | |
450 | if ((bfd_section_flags (sec) | |
451 | & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) | |
452 | == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) | |
453 | { | |
454 | have_code_sections = true; | |
455 | break; | |
456 | } | |
457 | if (!have_code_sections) | |
458 | return true; | |
459 | } | |
460 | ||
e214f8db | 461 | if (!elf_flags_init (obfd)) |
462 | { | |
463 | elf_flags_init (obfd) = true; | |
464 | elf_elfheader (obfd)->e_flags = in_flags; | |
465 | return true; | |
466 | } | |
c4a7e6b5 | 467 | else if (out_flags != in_flags) |
468 | { | |
469 | if ((EF_LOONGARCH_IS_OBJ_V0 (out_flags) | |
470 | && EF_LOONGARCH_IS_OBJ_V1 (in_flags)) | |
471 | || (EF_LOONGARCH_IS_OBJ_V0 (in_flags) | |
472 | && EF_LOONGARCH_IS_OBJ_V1 (out_flags))) | |
473 | { | |
474 | elf_elfheader (obfd)->e_flags |= EF_LOONGARCH_OBJABI_V1; | |
475 | out_flags = elf_elfheader (obfd)->e_flags; | |
476 | in_flags = out_flags; | |
477 | } | |
478 | } | |
e214f8db | 479 | |
480 | /* Disallow linking different ABIs. */ | |
c4a7e6b5 | 481 | /* Only check relocation version. |
482 | The obj_v0 is compatible with obj_v1. */ | |
3b14682a | 483 | if (EF_LOONGARCH_ABI(out_flags ^ in_flags) & EF_LOONGARCH_ABI_MASK) |
e214f8db | 484 | { |
485 | _bfd_error_handler (_("%pB: can't link different ABI object."), ibfd); | |
486 | goto fail; | |
487 | } | |
488 | ||
489 | return true; | |
490 | ||
491 | fail: | |
492 | bfd_set_error (bfd_error_bad_value); | |
493 | return false; | |
494 | } | |
495 | ||
496 | /* Create the .got section. */ | |
497 | ||
498 | static bool | |
499 | loongarch_elf_create_got_section (bfd *abfd, struct bfd_link_info *info) | |
500 | { | |
501 | flagword flags; | |
502 | char *name; | |
503 | asection *s, *s_got; | |
504 | struct elf_link_hash_entry *h; | |
505 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
506 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
507 | ||
508 | /* This function may be called more than once. */ | |
509 | if (htab->sgot != NULL) | |
510 | return true; | |
511 | ||
512 | flags = bed->dynamic_sec_flags; | |
513 | name = bed->rela_plts_and_copies_p ? ".rela.got" : ".rel.got"; | |
514 | s = bfd_make_section_anyway_with_flags (abfd, name, flags | SEC_READONLY); | |
515 | ||
516 | if (s == NULL || !bfd_set_section_alignment (s, bed->s->log_file_align)) | |
517 | return false; | |
518 | htab->srelgot = s; | |
519 | ||
520 | s = s_got = bfd_make_section_anyway_with_flags (abfd, ".got", flags); | |
521 | if (s == NULL || !bfd_set_section_alignment (s, bed->s->log_file_align)) | |
522 | return false; | |
523 | htab->sgot = s; | |
524 | ||
525 | /* The first bit of the global offset table is the header. */ | |
526 | s->size += bed->got_header_size; | |
527 | ||
528 | if (bed->want_got_plt) | |
529 | { | |
530 | s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags); | |
531 | if (s == NULL || !bfd_set_section_alignment (s, bed->s->log_file_align)) | |
532 | return false; | |
533 | htab->sgotplt = s; | |
534 | ||
535 | /* Reserve room for the header. */ | |
536 | s->size = GOTPLT_HEADER_SIZE; | |
537 | } | |
538 | ||
539 | if (bed->want_got_sym) | |
540 | { | |
541 | /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got | |
542 | section. We don't do this in the linker script because we don't want | |
543 | to define the symbol if we are not creating a global offset table. */ | |
544 | h = _bfd_elf_define_linkage_sym (abfd, info, s_got, | |
545 | "_GLOBAL_OFFSET_TABLE_"); | |
546 | elf_hash_table (info)->hgot = h; | |
547 | if (h == NULL) | |
548 | return false; | |
549 | } | |
550 | return true; | |
551 | } | |
552 | ||
553 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and | |
554 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
555 | hash table. */ | |
556 | ||
557 | static bool | |
558 | loongarch_elf_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) | |
559 | { | |
560 | struct loongarch_elf_link_hash_table *htab; | |
561 | ||
562 | htab = loongarch_elf_hash_table (info); | |
563 | BFD_ASSERT (htab != NULL); | |
564 | ||
565 | if (!loongarch_elf_create_got_section (dynobj, info)) | |
566 | return false; | |
567 | ||
568 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) | |
569 | return false; | |
570 | ||
571 | if (!bfd_link_pic (info)) | |
572 | htab->sdyntdata | |
573 | = bfd_make_section_anyway_with_flags (dynobj, ".tdata.dyn", | |
574 | SEC_ALLOC | SEC_THREAD_LOCAL); | |
575 | ||
576 | if (!htab->elf.splt || !htab->elf.srelplt || !htab->elf.sdynbss | |
577 | || (!bfd_link_pic (info) && (!htab->elf.srelbss || !htab->sdyntdata))) | |
578 | abort (); | |
579 | ||
580 | return true; | |
581 | } | |
582 | ||
583 | static bool | |
584 | loongarch_elf_record_tls_and_got_reference (bfd *abfd, | |
585 | struct bfd_link_info *info, | |
586 | struct elf_link_hash_entry *h, | |
587 | unsigned long symndx, | |
588 | char tls_type) | |
589 | { | |
590 | struct loongarch_elf_link_hash_table *htab = loongarch_elf_hash_table (info); | |
591 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
592 | ||
593 | /* This is a global offset table entry for a local symbol. */ | |
594 | if (elf_local_got_refcounts (abfd) == NULL) | |
595 | { | |
596 | bfd_size_type size = | |
597 | symtab_hdr->sh_info * (sizeof (bfd_vma) + sizeof (tls_type)); | |
598 | if (!(elf_local_got_refcounts (abfd) = bfd_zalloc (abfd, size))) | |
599 | return false; | |
600 | _bfd_loongarch_elf_local_got_tls_type (abfd) = | |
601 | (char *) (elf_local_got_refcounts (abfd) + symtab_hdr->sh_info); | |
602 | } | |
603 | ||
604 | switch (tls_type) | |
605 | { | |
606 | case GOT_NORMAL: | |
607 | case GOT_TLS_GD: | |
608 | case GOT_TLS_IE: | |
4f248d61 | 609 | case GOT_TLS_GDESC: |
e214f8db | 610 | /* Need GOT. */ |
611 | if (htab->elf.sgot == NULL | |
612 | && !loongarch_elf_create_got_section (htab->elf.dynobj, info)) | |
613 | return false; | |
614 | if (h) | |
615 | { | |
616 | if (h->got.refcount < 0) | |
617 | h->got.refcount = 0; | |
618 | h->got.refcount++; | |
619 | } | |
620 | else | |
621 | elf_local_got_refcounts (abfd)[symndx]++; | |
622 | break; | |
623 | case GOT_TLS_LE: | |
624 | /* No need for GOT. */ | |
625 | break; | |
626 | default: | |
627 | _bfd_error_handler (_("Internal error: unreachable.")); | |
628 | return false; | |
629 | } | |
630 | ||
631 | char *new_tls_type = &_bfd_loongarch_elf_tls_type (abfd, h, symndx); | |
632 | *new_tls_type |= tls_type; | |
3898e04b LC |
633 | |
634 | /* If a symbol is accessed by both IE and DESC, relax DESC to IE. */ | |
635 | if ((*new_tls_type & GOT_TLS_IE) && (*new_tls_type & GOT_TLS_GDESC)) | |
636 | *new_tls_type &= ~ (GOT_TLS_GDESC); | |
e214f8db | 637 | if ((*new_tls_type & GOT_NORMAL) && (*new_tls_type & ~GOT_NORMAL)) |
638 | { | |
639 | _bfd_error_handler (_("%pB: `%s' accessed both as normal and " | |
640 | "thread local symbol"), | |
641 | abfd, | |
642 | h ? h->root.root.string : "<local>"); | |
643 | return false; | |
644 | } | |
645 | ||
646 | return true; | |
647 | } | |
648 | ||
3898e04b LC |
649 | static unsigned int |
650 | loongarch_reloc_got_type (unsigned int r_type) | |
651 | { | |
652 | switch (r_type) | |
653 | { | |
654 | case R_LARCH_TLS_DESC_PC_HI20: | |
655 | case R_LARCH_TLS_DESC_PC_LO12: | |
656 | case R_LARCH_TLS_DESC_LD: | |
657 | case R_LARCH_TLS_DESC_CALL: | |
658 | return GOT_TLS_GDESC; | |
659 | ||
660 | case R_LARCH_TLS_IE_PC_HI20: | |
661 | case R_LARCH_TLS_IE_PC_LO12: | |
662 | return GOT_TLS_IE; | |
663 | ||
664 | default: | |
665 | break; | |
666 | } | |
667 | return GOT_UNKNOWN; | |
668 | } | |
669 | ||
670 | /* Return true if tls type transition can be performed. */ | |
671 | static bool | |
0e45942b LC |
672 | loongarch_can_trans_tls (bfd *input_bfd, |
673 | struct bfd_link_info *info, | |
674 | struct elf_link_hash_entry *h, | |
675 | unsigned int r_symndx, | |
676 | unsigned int r_type) | |
3898e04b LC |
677 | { |
678 | char symbol_tls_type; | |
679 | unsigned int reloc_got_type; | |
680 | ||
0e45942b LC |
681 | /* Only TLS DESC/IE in normal code mode will perform type |
682 | transition. */ | |
683 | if (! IS_LOONGARCH_TLS_TRANS_RELOC (r_type)) | |
3898e04b LC |
684 | return false; |
685 | ||
b221bff7 LC |
686 | /* Obtaining tls got type here may occur before |
687 | loongarch_elf_record_tls_and_got_reference, so it is necessary | |
688 | to ensure that tls got type has been initialized, otherwise it | |
689 | is set to GOT_UNKNOWN. */ | |
690 | symbol_tls_type = GOT_UNKNOWN; | |
691 | if (_bfd_loongarch_elf_local_got_tls_type (input_bfd) || h) | |
692 | symbol_tls_type = _bfd_loongarch_elf_tls_type (input_bfd, h, r_symndx); | |
693 | ||
3898e04b LC |
694 | reloc_got_type = loongarch_reloc_got_type (r_type); |
695 | ||
696 | if (symbol_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (reloc_got_type)) | |
697 | return true; | |
698 | ||
699 | if (! bfd_link_executable (info)) | |
700 | return false; | |
701 | ||
702 | if (h && h->root.type == bfd_link_hash_undefweak) | |
703 | return false; | |
704 | ||
705 | return true; | |
706 | } | |
707 | ||
708 | /* The type of relocation that can be transitioned. */ | |
709 | static unsigned int | |
710 | loongarch_tls_transition_without_check (struct bfd_link_info *info, | |
711 | unsigned int r_type, | |
712 | struct elf_link_hash_entry *h) | |
713 | { | |
714 | bool local_exec = bfd_link_executable (info) | |
715 | && SYMBOL_REFERENCES_LOCAL (info, h); | |
716 | ||
717 | switch (r_type) | |
718 | { | |
719 | case R_LARCH_TLS_DESC_PC_HI20: | |
720 | return (local_exec | |
721 | ? R_LARCH_TLS_LE_HI20 | |
722 | : R_LARCH_TLS_IE_PC_HI20); | |
723 | ||
724 | case R_LARCH_TLS_DESC_PC_LO12: | |
725 | return (local_exec | |
726 | ? R_LARCH_TLS_LE_LO12 | |
727 | : R_LARCH_TLS_IE_PC_LO12); | |
728 | ||
729 | case R_LARCH_TLS_DESC_LD: | |
730 | case R_LARCH_TLS_DESC_CALL: | |
731 | return R_LARCH_NONE; | |
732 | ||
733 | case R_LARCH_TLS_IE_PC_HI20: | |
734 | return local_exec ? R_LARCH_TLS_LE_HI20 : r_type; | |
735 | ||
736 | case R_LARCH_TLS_IE_PC_LO12: | |
737 | return local_exec ? R_LARCH_TLS_LE_LO12 : r_type; | |
738 | ||
739 | default: | |
740 | break; | |
741 | } | |
742 | ||
743 | return r_type; | |
744 | } | |
745 | ||
746 | static unsigned int | |
0e45942b LC |
747 | loongarch_tls_transition (bfd *input_bfd, |
748 | struct bfd_link_info *info, | |
749 | struct elf_link_hash_entry *h, | |
750 | unsigned int r_symndx, | |
751 | unsigned int r_type) | |
3898e04b | 752 | { |
0e45942b | 753 | if (! loongarch_can_trans_tls (input_bfd, info, h, r_symndx, r_type)) |
3898e04b LC |
754 | return r_type; |
755 | ||
756 | return loongarch_tls_transition_without_check (info, r_type, h); | |
757 | } | |
758 | ||
e214f8db | 759 | /* Look through the relocs for a section during the first phase, and |
760 | allocate space in the global offset table or procedure linkage | |
761 | table. */ | |
762 | ||
66156bae LC |
763 | static bool |
764 | bad_static_reloc (bfd *abfd, const Elf_Internal_Rela *rel, asection *sec, | |
765 | unsigned r_type, struct elf_link_hash_entry *h, | |
766 | Elf_Internal_Sym *isym) | |
767 | { | |
768 | /* We propably can improve the information to tell users that they should | |
769 | be recompile the code with -fPIC or -fPIE, just like what x86 does. */ | |
770 | reloc_howto_type * r = loongarch_elf_rtype_to_howto (abfd, r_type); | |
771 | const char *name = NULL; | |
772 | ||
773 | if (h) | |
774 | name = h->root.root.string; | |
775 | else if (isym) | |
776 | name = bfd_elf_string_from_elf_section (abfd, | |
777 | elf_symtab_hdr (abfd).sh_link, | |
778 | isym->st_name); | |
779 | if (name == NULL || *name == '\0') | |
780 | name ="<nameless>"; | |
781 | ||
782 | (*_bfd_error_handler) | |
783 | (_("%pB:(%pA+%#lx): relocation %s against `%s` can not be used when making " | |
784 | "a shared object; recompile with -fPIC"), | |
679ad6e1 | 785 | abfd, sec, (long) rel->r_offset, r ? r->name : _("<unknown>"), name); |
66156bae LC |
786 | bfd_set_error (bfd_error_bad_value); |
787 | return false; | |
788 | } | |
789 | ||
e214f8db | 790 | static bool |
791 | loongarch_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, | |
792 | asection *sec, const Elf_Internal_Rela *relocs) | |
793 | { | |
794 | struct loongarch_elf_link_hash_table *htab; | |
795 | Elf_Internal_Shdr *symtab_hdr; | |
796 | struct elf_link_hash_entry **sym_hashes; | |
797 | const Elf_Internal_Rela *rel; | |
798 | asection *sreloc = NULL; | |
799 | ||
800 | if (bfd_link_relocatable (info)) | |
801 | return true; | |
802 | ||
803 | htab = loongarch_elf_hash_table (info); | |
804 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
805 | sym_hashes = elf_sym_hashes (abfd); | |
806 | ||
807 | if (htab->elf.dynobj == NULL) | |
808 | htab->elf.dynobj = abfd; | |
809 | ||
810 | for (rel = relocs; rel < relocs + sec->reloc_count; rel++) | |
811 | { | |
812 | unsigned int r_type; | |
813 | unsigned int r_symndx; | |
814 | struct elf_link_hash_entry *h; | |
815 | Elf_Internal_Sym *isym = NULL; | |
816 | ||
e214f8db | 817 | r_symndx = ELFNN_R_SYM (rel->r_info); |
818 | r_type = ELFNN_R_TYPE (rel->r_info); | |
819 | ||
820 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
821 | { | |
822 | _bfd_error_handler (_("%pB: bad symbol index: %d"), abfd, r_symndx); | |
823 | return false; | |
824 | } | |
825 | ||
826 | if (r_symndx < symtab_hdr->sh_info) | |
827 | { | |
828 | /* A local symbol. */ | |
6d13722a | 829 | isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, abfd, r_symndx); |
e214f8db | 830 | if (isym == NULL) |
831 | return false; | |
832 | ||
833 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) | |
834 | { | |
835 | h = elfNN_loongarch_get_local_sym_hash (htab, abfd, rel, true); | |
836 | if (h == NULL) | |
837 | return false; | |
838 | ||
839 | h->type = STT_GNU_IFUNC; | |
840 | h->ref_regular = 1; | |
841 | } | |
842 | else | |
843 | h = NULL; | |
844 | } | |
845 | else | |
846 | { | |
847 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
848 | while (h->root.type == bfd_link_hash_indirect | |
849 | || h->root.type == bfd_link_hash_warning) | |
850 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
851 | } | |
852 | ||
d218dba3 | 853 | /* It is referenced by a non-shared object. */ |
854 | if (h != NULL) | |
855 | h->ref_regular = 1; | |
856 | ||
e214f8db | 857 | if (h && h->type == STT_GNU_IFUNC) |
858 | { | |
859 | if (htab->elf.dynobj == NULL) | |
860 | htab->elf.dynobj = abfd; | |
861 | ||
6d13722a | 862 | /* Create 'irelifunc' in PIC object. */ |
863 | if (bfd_link_pic (info) | |
864 | && !_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info)) | |
865 | return false; | |
866 | /* If '.plt' not represent, create '.iplt' to deal with ifunc. */ | |
867 | else if (!htab->elf.splt | |
868 | && !_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info)) | |
869 | return false; | |
d218dba3 | 870 | /* Create the ifunc sections, iplt and ipltgot, for static |
871 | executables. */ | |
872 | if ((r_type == R_LARCH_64 || r_type == R_LARCH_32) | |
873 | && !_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info)) | |
874 | return false; | |
875 | ||
e214f8db | 876 | if (h->plt.refcount < 0) |
877 | h->plt.refcount = 0; | |
878 | h->plt.refcount++; | |
879 | h->needs_plt = 1; | |
880 | ||
881 | elf_tdata (info->output_bfd)->has_gnu_osabi |= elf_gnu_osabi_ifunc; | |
882 | } | |
883 | ||
6d13722a | 884 | int need_dynreloc = 0; |
885 | int only_need_pcrel = 0; | |
886 | ||
0e45942b LC |
887 | /* Type transitions are only possible with relocations accompanied |
888 | by R_LARCH_RELAX. */ | |
889 | if (rel + 1 != relocs + sec->reloc_count | |
890 | && ELFNN_R_TYPE (rel[1].r_info) == R_LARCH_RELAX) | |
891 | r_type = loongarch_tls_transition (abfd, info, h, r_symndx, r_type); | |
e214f8db | 892 | switch (r_type) |
893 | { | |
6d13722a | 894 | case R_LARCH_GOT_PC_HI20: |
895 | case R_LARCH_GOT_HI20: | |
e214f8db | 896 | case R_LARCH_SOP_PUSH_GPREL: |
6d13722a | 897 | /* For la.global. */ |
898 | if (h) | |
899 | h->pointer_equality_needed = 1; | |
e214f8db | 900 | if (!loongarch_elf_record_tls_and_got_reference (abfd, info, h, |
901 | r_symndx, | |
902 | GOT_NORMAL)) | |
903 | return false; | |
904 | break; | |
905 | ||
6d13722a | 906 | case R_LARCH_TLS_LD_PC_HI20: |
907 | case R_LARCH_TLS_LD_HI20: | |
908 | case R_LARCH_TLS_GD_PC_HI20: | |
909 | case R_LARCH_TLS_GD_HI20: | |
e214f8db | 910 | case R_LARCH_SOP_PUSH_TLS_GD: |
911 | if (!loongarch_elf_record_tls_and_got_reference (abfd, info, h, | |
912 | r_symndx, | |
913 | GOT_TLS_GD)) | |
914 | return false; | |
915 | break; | |
916 | ||
6d13722a | 917 | case R_LARCH_TLS_IE_PC_HI20: |
918 | case R_LARCH_TLS_IE_HI20: | |
e214f8db | 919 | case R_LARCH_SOP_PUSH_TLS_GOT: |
920 | if (bfd_link_pic (info)) | |
921 | /* May fail for lazy-bind. */ | |
922 | info->flags |= DF_STATIC_TLS; | |
923 | ||
924 | if (!loongarch_elf_record_tls_and_got_reference (abfd, info, h, | |
925 | r_symndx, | |
926 | GOT_TLS_IE)) | |
927 | return false; | |
928 | break; | |
929 | ||
6d13722a | 930 | case R_LARCH_TLS_LE_HI20: |
aae8784c | 931 | case R_LARCH_TLS_LE_HI20_R: |
e214f8db | 932 | case R_LARCH_SOP_PUSH_TLS_TPREL: |
933 | if (!bfd_link_executable (info)) | |
66156bae | 934 | return bad_static_reloc (abfd, rel, sec, r_type, h, isym); |
e214f8db | 935 | |
e214f8db | 936 | if (!loongarch_elf_record_tls_and_got_reference (abfd, info, h, |
937 | r_symndx, | |
938 | GOT_TLS_LE)) | |
939 | return false; | |
940 | break; | |
941 | ||
4f248d61 LC |
942 | case R_LARCH_TLS_DESC_PC_HI20: |
943 | case R_LARCH_TLS_DESC_HI20: | |
944 | if (!loongarch_elf_record_tls_and_got_reference (abfd, info, h, | |
945 | r_symndx, | |
946 | GOT_TLS_GDESC)) | |
947 | return false; | |
948 | break; | |
949 | ||
6d13722a | 950 | case R_LARCH_ABS_HI20: |
e214f8db | 951 | case R_LARCH_SOP_PUSH_ABSOLUTE: |
66156bae LC |
952 | if (bfd_link_pic (info)) |
953 | return bad_static_reloc (abfd, rel, sec, r_type, h, isym); | |
954 | ||
e214f8db | 955 | if (h != NULL) |
956 | /* If this reloc is in a read-only section, we might | |
957 | need a copy reloc. We can't check reliably at this | |
958 | stage whether the section is read-only, as input | |
959 | sections have not yet been mapped to output sections. | |
960 | Tentatively set the flag for now, and correct in | |
961 | adjust_dynamic_symbol. */ | |
962 | h->non_got_ref = 1; | |
963 | break; | |
964 | ||
e493ba62 | 965 | /* For normal cmodel, pcalau12i + addi.d/w used to data. |
966 | For first version medium cmodel, pcalau12i + jirl are used to | |
967 | function call, it need to creat PLT entry for STT_FUNC and | |
968 | STT_GNU_IFUNC type symbol. */ | |
6d13722a | 969 | case R_LARCH_PCALA_HI20: |
e493ba62 | 970 | if (h != NULL && (STT_FUNC == h->type || STT_GNU_IFUNC == h->type)) |
e214f8db | 971 | { |
42bd5254 | 972 | /* For pcalau12i + jirl. */ |
973 | h->needs_plt = 1; | |
974 | if (h->plt.refcount < 0) | |
975 | h->plt.refcount = 0; | |
976 | h->plt.refcount++; | |
977 | ||
e214f8db | 978 | h->non_got_ref = 1; |
6d13722a | 979 | h->pointer_equality_needed = 1; |
980 | } | |
981 | ||
982 | break; | |
983 | ||
6d13722a | 984 | case R_LARCH_B16: |
1b6fccd2 | 985 | case R_LARCH_B21: |
6d13722a | 986 | case R_LARCH_B26: |
dc5f359e | 987 | case R_LARCH_CALL36: |
6d13722a | 988 | if (h != NULL) |
989 | { | |
990 | h->needs_plt = 1; | |
991 | if (!bfd_link_pic (info)) | |
992 | h->non_got_ref = 1; | |
e214f8db | 993 | |
994 | /* We try to create PLT stub for all non-local function. */ | |
995 | if (h->plt.refcount < 0) | |
996 | h->plt.refcount = 0; | |
997 | h->plt.refcount++; | |
998 | } | |
6d13722a | 999 | |
1000 | break; | |
1001 | ||
1002 | case R_LARCH_SOP_PUSH_PCREL: | |
1003 | if (h != NULL) | |
1004 | { | |
1005 | if (!bfd_link_pic (info)) | |
1006 | h->non_got_ref = 1; | |
1007 | ||
1008 | /* We try to create PLT stub for all non-local function. */ | |
1009 | if (h->plt.refcount < 0) | |
1010 | h->plt.refcount = 0; | |
1011 | h->plt.refcount++; | |
1012 | h->pointer_equality_needed = 1; | |
1013 | } | |
1014 | ||
e214f8db | 1015 | break; |
1016 | ||
1017 | case R_LARCH_SOP_PUSH_PLT_PCREL: | |
1018 | /* This symbol requires a procedure linkage table entry. We | |
1019 | actually build the entry in adjust_dynamic_symbol, | |
1020 | because this might be a case of linking PIC code without | |
1021 | linking in any dynamic objects, in which case we don't | |
1022 | need to generate a procedure linkage table after all. */ | |
1023 | if (h != NULL) | |
1024 | { | |
1025 | h->needs_plt = 1; | |
1026 | if (h->plt.refcount < 0) | |
1027 | h->plt.refcount = 0; | |
1028 | h->plt.refcount++; | |
1029 | } | |
1030 | break; | |
1031 | ||
1032 | case R_LARCH_TLS_DTPREL32: | |
1033 | case R_LARCH_TLS_DTPREL64: | |
1034 | need_dynreloc = 1; | |
1035 | only_need_pcrel = 1; | |
1036 | break; | |
1037 | ||
1038 | case R_LARCH_JUMP_SLOT: | |
1039 | case R_LARCH_32: | |
1040 | case R_LARCH_64: | |
6d13722a | 1041 | |
e214f8db | 1042 | need_dynreloc = 1; |
1043 | ||
1044 | /* If resolved symbol is defined in this object, | |
1045 | 1. Under pie, the symbol is known. We convert it | |
1046 | into R_LARCH_RELATIVE and need load-addr still. | |
1047 | 2. Under pde, the symbol is known and we can discard R_LARCH_NN. | |
1048 | 3. Under dll, R_LARCH_NN can't be changed normally, since | |
1049 | its defination could be covered by the one in executable. | |
1050 | For symbolic, we convert it into R_LARCH_RELATIVE. | |
1051 | Thus, only under pde, it needs pcrel only. We discard it. */ | |
1052 | only_need_pcrel = bfd_link_pde (info); | |
1053 | ||
d218dba3 | 1054 | if (h != NULL |
1055 | && (!bfd_link_pic (info) | |
1056 | || h->type == STT_GNU_IFUNC)) | |
1057 | { | |
1058 | /* This reloc might not bind locally. */ | |
1059 | h->non_got_ref = 1; | |
1060 | h->pointer_equality_needed = 1; | |
1061 | ||
1062 | if (!h->def_regular | |
1063 | || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0) | |
1064 | { | |
1065 | /* We may need a .plt entry if the symbol is a function | |
1066 | defined in a shared lib or is a function referenced | |
1067 | from the code or read-only section. */ | |
1068 | h->plt.refcount += 1; | |
1069 | } | |
1070 | } | |
e214f8db | 1071 | break; |
1072 | ||
1073 | case R_LARCH_GNU_VTINHERIT: | |
1074 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
1075 | return false; | |
1076 | break; | |
1077 | ||
1078 | case R_LARCH_GNU_VTENTRY: | |
1079 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
1080 | return false; | |
1081 | break; | |
1082 | ||
1083 | default: | |
1084 | break; | |
1085 | } | |
1086 | ||
1087 | /* Record some info for sizing and allocating dynamic entry. */ | |
1088 | if (need_dynreloc && (sec->flags & SEC_ALLOC)) | |
1089 | { | |
1090 | /* When creating a shared object, we must copy these | |
1091 | relocs into the output file. We create a reloc | |
1092 | section in dynobj and make room for the reloc. */ | |
1093 | struct elf_dyn_relocs *p; | |
1094 | struct elf_dyn_relocs **head; | |
1095 | ||
1096 | if (sreloc == NULL) | |
1097 | { | |
1098 | sreloc | |
1099 | = _bfd_elf_make_dynamic_reloc_section (sec, htab->elf.dynobj, | |
1100 | LARCH_ELF_LOG_WORD_BYTES, | |
1101 | abfd, /*rela?*/ true); | |
1102 | if (sreloc == NULL) | |
1103 | return false; | |
1104 | } | |
1105 | ||
1106 | /* If this is a global symbol, we count the number of | |
1107 | relocations we need for this symbol. */ | |
1108 | if (h != NULL) | |
d218dba3 | 1109 | head = &h->dyn_relocs; |
e214f8db | 1110 | else |
1111 | { | |
1112 | /* Track dynamic relocs needed for local syms too. | |
1113 | We really need local syms available to do this | |
1114 | easily. Oh well. */ | |
1115 | ||
1116 | asection *s; | |
1117 | void *vpp; | |
1118 | ||
1119 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
1120 | if (s == NULL) | |
1121 | s = sec; | |
1122 | ||
1123 | vpp = &elf_section_data (s)->local_dynrel; | |
1124 | head = (struct elf_dyn_relocs **) vpp; | |
1125 | } | |
1126 | ||
1127 | p = *head; | |
1128 | if (p == NULL || p->sec != sec) | |
1129 | { | |
1130 | bfd_size_type amt = sizeof *p; | |
1131 | p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj, amt); | |
1132 | if (p == NULL) | |
1133 | return false; | |
1134 | p->next = *head; | |
1135 | *head = p; | |
1136 | p->sec = sec; | |
1137 | p->count = 0; | |
1138 | p->pc_count = 0; | |
1139 | } | |
1140 | ||
1141 | p->count++; | |
1142 | p->pc_count += only_need_pcrel; | |
1143 | } | |
1144 | } | |
1145 | ||
1146 | return true; | |
1147 | } | |
1148 | ||
1149 | /* Find dynamic relocs for H that apply to read-only sections. */ | |
1150 | ||
1151 | static asection * | |
1152 | readonly_dynrelocs (struct elf_link_hash_entry *h) | |
1153 | { | |
1154 | struct elf_dyn_relocs *p; | |
1155 | ||
d218dba3 | 1156 | for (p = h->dyn_relocs; p != NULL; p = p->next) |
e214f8db | 1157 | { |
1158 | asection *s = p->sec->output_section; | |
1159 | ||
1160 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1161 | return p->sec; | |
1162 | } | |
1163 | return NULL; | |
1164 | } | |
1165 | ||
1166 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
1167 | regular object. The current definition is in some section of the | |
1168 | dynamic object, but we're not including those sections. We have to | |
1169 | change the definition to something the rest of the link can | |
1170 | understand. */ | |
1171 | static bool | |
1172 | loongarch_elf_adjust_dynamic_symbol (struct bfd_link_info *info, | |
1173 | struct elf_link_hash_entry *h) | |
1174 | { | |
1175 | struct loongarch_elf_link_hash_table *htab; | |
e214f8db | 1176 | bfd *dynobj; |
e214f8db | 1177 | |
1178 | htab = loongarch_elf_hash_table (info); | |
1179 | BFD_ASSERT (htab != NULL); | |
1180 | ||
1181 | dynobj = htab->elf.dynobj; | |
1182 | ||
1183 | /* Make sure we know what is going on here. */ | |
1184 | BFD_ASSERT (dynobj != NULL | |
1b6fccd2 | 1185 | && (h->needs_plt |
1186 | || h->type == STT_GNU_IFUNC | |
1187 | || h->is_weakalias | |
1188 | || (h->def_dynamic | |
1189 | && h->ref_regular | |
1190 | && !h->def_regular))); | |
e214f8db | 1191 | |
1192 | /* If this is a function, put it in the procedure linkage table. We | |
1193 | will fill in the contents of the procedure linkage table later | |
1194 | (although we could actually do it here). */ | |
1195 | if (h->type == STT_FUNC || h->type == STT_GNU_IFUNC || h->needs_plt) | |
1196 | { | |
6a1cf1bf | 1197 | if (h->plt.refcount <= 0 |
e214f8db | 1198 | || (h->type != STT_GNU_IFUNC |
1199 | && (SYMBOL_REFERENCES_LOCAL (info, h) | |
1200 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
1201 | && h->root.type == bfd_link_hash_undefweak)))) | |
1202 | { | |
1203 | /* This case can occur if we saw a R_LARCH_SOP_PUSH_PLT_PCREL reloc | |
1204 | in an input file, but the symbol was never referred to by a | |
1205 | dynamic object, or if all references were garbage collected. | |
1206 | In such a case, we don't actually need to build a PLT entry. */ | |
1207 | h->plt.offset = MINUS_ONE; | |
1208 | h->needs_plt = 0; | |
1209 | } | |
e214f8db | 1210 | |
1211 | return true; | |
1212 | } | |
1213 | else | |
1214 | h->plt.offset = MINUS_ONE; | |
1215 | ||
1216 | /* If this is a weak symbol, and there is a real definition, the | |
1217 | processor independent code will have arranged for us to see the | |
1218 | real definition first, and we can just use the same value. */ | |
1219 | if (h->is_weakalias) | |
1220 | { | |
1221 | struct elf_link_hash_entry *def = weakdef (h); | |
1222 | BFD_ASSERT (def->root.type == bfd_link_hash_defined); | |
1223 | h->root.u.def.section = def->root.u.def.section; | |
1224 | h->root.u.def.value = def->root.u.def.value; | |
1225 | return true; | |
1226 | } | |
1227 | ||
6d13722a | 1228 | /* R_LARCH_COPY is not adept glibc, not to generate. */ |
1229 | /* Can not print anything, because make check ld. */ | |
1230 | return true; | |
e214f8db | 1231 | } |
1232 | ||
1233 | /* Allocate space in .plt, .got and associated reloc sections for | |
1234 | dynamic relocs. */ | |
1235 | ||
1236 | static bool | |
1237 | allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) | |
1238 | { | |
1239 | struct bfd_link_info *info; | |
1240 | struct loongarch_elf_link_hash_table *htab; | |
e214f8db | 1241 | struct elf_dyn_relocs *p; |
1242 | ||
1243 | if (h->root.type == bfd_link_hash_indirect) | |
1244 | return true; | |
1245 | ||
d218dba3 | 1246 | if (h->type == STT_GNU_IFUNC |
1247 | && h->def_regular) | |
1248 | return true; | |
1249 | ||
e214f8db | 1250 | info = (struct bfd_link_info *) inf; |
1251 | htab = loongarch_elf_hash_table (info); | |
6d13722a | 1252 | bool dyn = htab->elf.dynamic_sections_created; |
e214f8db | 1253 | BFD_ASSERT (htab != NULL); |
1254 | ||
1255 | do | |
1256 | { | |
1257 | asection *plt, *gotplt, *relplt; | |
1258 | ||
1259 | if (!h->needs_plt) | |
1260 | break; | |
1261 | ||
1262 | h->needs_plt = 0; | |
1263 | ||
1264 | if (htab->elf.splt) | |
1265 | { | |
6d13722a | 1266 | if (h->dynindx == -1 && !h->forced_local && dyn |
1267 | && h->root.type == bfd_link_hash_undefweak) | |
1268 | { | |
1269 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) | |
1270 | return false; | |
1271 | } | |
e214f8db | 1272 | |
1273 | if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h) | |
1274 | && h->type != STT_GNU_IFUNC) | |
1275 | break; | |
1276 | ||
1277 | plt = htab->elf.splt; | |
1278 | gotplt = htab->elf.sgotplt; | |
1279 | relplt = htab->elf.srelplt; | |
1280 | } | |
1281 | else if (htab->elf.iplt) | |
1282 | { | |
1283 | /* .iplt only for IFUNC. */ | |
1284 | if (h->type != STT_GNU_IFUNC) | |
1285 | break; | |
1286 | ||
1287 | plt = htab->elf.iplt; | |
1288 | gotplt = htab->elf.igotplt; | |
1289 | relplt = htab->elf.irelplt; | |
1290 | } | |
1291 | else | |
1292 | break; | |
1293 | ||
1294 | if (plt->size == 0) | |
1295 | plt->size = PLT_HEADER_SIZE; | |
1296 | ||
1297 | h->plt.offset = plt->size; | |
1298 | plt->size += PLT_ENTRY_SIZE; | |
1299 | gotplt->size += GOT_ENTRY_SIZE; | |
1300 | relplt->size += sizeof (ElfNN_External_Rela); | |
1301 | ||
d218dba3 | 1302 | /* If this symbol is not defined in a regular file, and we are |
1303 | not generating a shared library, then set the symbol to this | |
1304 | location in the .plt. This is required to make function | |
1305 | pointers compare as equal between the normal executable and | |
1306 | the shared library. */ | |
6d13722a | 1307 | if (!bfd_link_pic (info) |
d218dba3 | 1308 | && !h->def_regular) |
1309 | { | |
1310 | h->root.u.def.section = plt; | |
1311 | h->root.u.def.value = h->plt.offset; | |
1312 | } | |
1313 | ||
e214f8db | 1314 | h->needs_plt = 1; |
1315 | } | |
1316 | while (0); | |
1317 | ||
1318 | if (!h->needs_plt) | |
1319 | h->plt.offset = MINUS_ONE; | |
1320 | ||
1321 | if (0 < h->got.refcount) | |
1322 | { | |
1323 | asection *s; | |
e214f8db | 1324 | int tls_type = loongarch_elf_hash_entry (h)->tls_type; |
1325 | ||
1326 | /* Make sure this symbol is output as a dynamic symbol. | |
1327 | Undefined weak syms won't yet be marked as dynamic. */ | |
6d13722a | 1328 | if (h->dynindx == -1 && !h->forced_local && dyn |
1329 | && h->root.type == bfd_link_hash_undefweak) | |
d218dba3 | 1330 | { |
6d13722a | 1331 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) |
1332 | return false; | |
d218dba3 | 1333 | } |
e214f8db | 1334 | |
1335 | s = htab->elf.sgot; | |
1336 | h->got.offset = s->size; | |
4f248d61 | 1337 | if (tls_type & (GOT_TLS_GD | GOT_TLS_IE | GOT_TLS_GDESC)) |
e214f8db | 1338 | { |
b67a17aa LC |
1339 | int indx = 0; |
1340 | bool need_reloc = false; | |
1341 | LARCH_TLS_GD_IE_NEED_DYN_RELOC (info, dyn, h, indx, | |
1342 | need_reloc); | |
e214f8db | 1343 | /* TLS_GD needs two dynamic relocs and two GOT slots. */ |
1344 | if (tls_type & GOT_TLS_GD) | |
1345 | { | |
1346 | s->size += 2 * GOT_ENTRY_SIZE; | |
b67a17aa LC |
1347 | if (need_reloc) |
1348 | htab->elf.srelgot->size += 2 * sizeof (ElfNN_External_Rela); | |
e214f8db | 1349 | } |
1350 | ||
1351 | /* TLS_IE needs one dynamic reloc and one GOT slot. */ | |
1352 | if (tls_type & GOT_TLS_IE) | |
1353 | { | |
1354 | s->size += GOT_ENTRY_SIZE; | |
b67a17aa LC |
1355 | if (need_reloc) |
1356 | htab->elf.srelgot->size += 2 * sizeof (ElfNN_External_Rela); | |
e214f8db | 1357 | } |
4f248d61 LC |
1358 | |
1359 | /* TLS_DESC needs one dynamic reloc and two GOT slot. */ | |
1360 | if (tls_type & GOT_TLS_GDESC) | |
1361 | { | |
1362 | s->size += GOT_ENTRY_SIZE * 2; | |
1363 | htab->elf.srelgot->size += sizeof (ElfNN_External_Rela); | |
1364 | } | |
e214f8db | 1365 | } |
4f248d61 | 1366 | |
e214f8db | 1367 | else |
1368 | { | |
1369 | s->size += GOT_ENTRY_SIZE; | |
6d13722a | 1370 | if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
1371 | || h->root.type != bfd_link_hash_undefweak) | |
1372 | && (bfd_link_pic (info) | |
1373 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), | |
1374 | h)) | |
1375 | && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) | |
1376 | /* Undefined weak symbol in static PIE resolves to 0 without | |
1377 | any dynamic relocations. */ | |
e214f8db | 1378 | htab->elf.srelgot->size += sizeof (ElfNN_External_Rela); |
1379 | } | |
1380 | } | |
1381 | else | |
1382 | h->got.offset = MINUS_ONE; | |
1383 | ||
d218dba3 | 1384 | if (h->dyn_relocs == NULL) |
e214f8db | 1385 | return true; |
1386 | ||
6d13722a | 1387 | /* Extra dynamic relocate, |
1388 | * R_LARCH_64 | |
1389 | * R_LARCH_TLS_DTPRELNN | |
1390 | * R_LARCH_JUMP_SLOT | |
1391 | * R_LARCH_NN. */ | |
1392 | ||
1393 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
e214f8db | 1394 | { |
1395 | struct elf_dyn_relocs **pp; | |
1396 | ||
d218dba3 | 1397 | for (pp = &h->dyn_relocs; (p = *pp) != NULL;) |
e214f8db | 1398 | { |
1399 | p->count -= p->pc_count; | |
1400 | p->pc_count = 0; | |
1401 | if (p->count == 0) | |
1402 | *pp = p->next; | |
1403 | else | |
1404 | pp = &p->next; | |
1405 | } | |
1406 | } | |
1407 | ||
1408 | if (h->root.type == bfd_link_hash_undefweak) | |
1409 | { | |
6d13722a | 1410 | if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h) |
1411 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
1412 | || (!bfd_link_pic (info) && h->non_got_ref)) | |
d218dba3 | 1413 | h->dyn_relocs = NULL; |
6d13722a | 1414 | else if (h->dynindx == -1 && !h->forced_local) |
1415 | { | |
1416 | /* Make sure this symbol is output as a dynamic symbol. | |
1417 | Undefined weak syms won't yet be marked as dynamic. */ | |
1418 | if (!bfd_elf_link_record_dynamic_symbol (info, h)) | |
1419 | return false; | |
1420 | ||
1421 | if (h->dynindx == -1) | |
1422 | h->dyn_relocs = NULL; | |
1423 | } | |
e214f8db | 1424 | } |
1425 | ||
d218dba3 | 1426 | for (p = h->dyn_relocs; p != NULL; p = p->next) |
e214f8db | 1427 | { |
fb266c90 JH |
1428 | if (discarded_section (p->sec)) |
1429 | continue; | |
e214f8db | 1430 | asection *sreloc = elf_section_data (p->sec)->sreloc; |
1431 | sreloc->size += p->count * sizeof (ElfNN_External_Rela); | |
1432 | } | |
1433 | ||
1434 | return true; | |
1435 | } | |
1436 | ||
bc2a35c0 | 1437 | /* A modified version of _bfd_elf_allocate_ifunc_dyn_relocs. |
1438 | For local def and ref ifunc, | |
1439 | dynamic relocations are stored in | |
1440 | 1. rela.srelgot section in dynamic object (dll or exec). | |
1441 | 2. rela.irelplt section in static executable. | |
1442 | Unlike _bfd_elf_allocate_ifunc_dyn_relocs, rela.srelgot is used | |
1443 | instead of rela.srelplt. Glibc ELF loader will not support | |
1444 | R_LARCH_IRELATIVE relocation in rela.plt. */ | |
1445 | ||
1446 | static bool | |
1447 | local_allocate_ifunc_dyn_relocs (struct bfd_link_info *info, | |
1448 | struct elf_link_hash_entry *h, | |
1449 | struct elf_dyn_relocs **head, | |
1450 | unsigned int plt_entry_size, | |
1451 | unsigned int plt_header_size, | |
1452 | unsigned int got_entry_size, | |
1453 | bool avoid_plt) | |
1454 | { | |
1455 | asection *plt, *gotplt, *relplt; | |
1456 | struct elf_dyn_relocs *p; | |
1457 | unsigned int sizeof_reloc; | |
1458 | const struct elf_backend_data *bed; | |
1459 | struct elf_link_hash_table *htab; | |
1460 | /* If AVOID_PLT is TRUE, don't use PLT if possible. */ | |
1461 | bool use_plt = !avoid_plt || h->plt.refcount > 0; | |
1462 | bool need_dynreloc = !use_plt || bfd_link_pic (info); | |
1463 | ||
1464 | /* When a PIC object references a STT_GNU_IFUNC symbol defined | |
1465 | in executable or it isn't referenced via PLT, the address of | |
1466 | the resolved function may be used. But in non-PIC executable, | |
1467 | the address of its plt slot may be used. Pointer equality may | |
1468 | not work correctly. PIE or non-PLT reference should be used if | |
1469 | pointer equality is required here. | |
1470 | ||
1471 | If STT_GNU_IFUNC symbol is defined in position-dependent executable, | |
1472 | backend should change it to the normal function and set its address | |
1473 | to its PLT entry which should be resolved by R_*_IRELATIVE at | |
1474 | run-time. All external references should be resolved to its PLT in | |
1475 | executable. */ | |
1476 | if (!need_dynreloc | |
1477 | && !(bfd_link_pde (info) && h->def_regular) | |
1478 | && (h->dynindx != -1 | |
1479 | || info->export_dynamic) | |
1480 | && h->pointer_equality_needed) | |
1481 | { | |
1482 | info->callbacks->einfo | |
1483 | /* xgettext:c-format. */ | |
1484 | (_("%F%P: dynamic STT_GNU_IFUNC symbol `%s' with pointer " | |
1485 | "equality in `%pB' can not be used when making an " | |
1486 | "executable; recompile with -fPIE and relink with -pie\n"), | |
1487 | h->root.root.string, | |
1488 | h->root.u.def.section->owner); | |
1489 | bfd_set_error (bfd_error_bad_value); | |
1490 | return false; | |
1491 | } | |
1492 | ||
1493 | htab = elf_hash_table (info); | |
1494 | ||
1495 | /* When the symbol is marked with regular reference, if PLT isn't used | |
1496 | or we are building a PIC object, we must keep dynamic relocation | |
1497 | if there is non-GOT reference and use PLT if there is PC-relative | |
1498 | reference. */ | |
1499 | if (need_dynreloc && h->ref_regular) | |
1500 | { | |
1501 | bool keep = false; | |
1502 | for (p = *head; p != NULL; p = p->next) | |
1503 | if (p->count) | |
1504 | { | |
1505 | h->non_got_ref = 1; | |
1506 | /* Need dynamic relocations for non-GOT reference. */ | |
1507 | keep = true; | |
1508 | if (p->pc_count) | |
1509 | { | |
1510 | /* Must use PLT for PC-relative reference. */ | |
1511 | use_plt = true; | |
1512 | need_dynreloc = bfd_link_pic (info); | |
1513 | break; | |
1514 | } | |
1515 | } | |
1516 | if (keep) | |
1517 | goto keep; | |
1518 | } | |
1519 | ||
1520 | /* Support garbage collection against STT_GNU_IFUNC symbols. */ | |
1521 | if (h->plt.refcount <= 0 && h->got.refcount <= 0) | |
1522 | { | |
1523 | h->got = htab->init_got_offset; | |
1524 | h->plt = htab->init_plt_offset; | |
1525 | *head = NULL; | |
1526 | return true; | |
1527 | } | |
1528 | ||
1529 | /* Return and discard space for dynamic relocations against it if | |
1530 | it is never referenced. */ | |
1531 | if (!h->ref_regular) | |
1532 | { | |
1533 | if (h->plt.refcount > 0 | |
1534 | || h->got.refcount > 0) | |
1535 | abort (); | |
1536 | h->got = htab->init_got_offset; | |
1537 | h->plt = htab->init_plt_offset; | |
1538 | *head = NULL; | |
1539 | return true; | |
1540 | } | |
1541 | ||
1542 | keep: | |
1543 | bed = get_elf_backend_data (info->output_bfd); | |
1544 | if (bed->rela_plts_and_copies_p) | |
1545 | sizeof_reloc = bed->s->sizeof_rela; | |
1546 | else | |
1547 | sizeof_reloc = bed->s->sizeof_rel; | |
1548 | ||
1549 | /* When building a static executable, use iplt, igot.plt and | |
1550 | rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
1551 | if (htab->splt != NULL) | |
1552 | { | |
1553 | plt = htab->splt; | |
1554 | gotplt = htab->sgotplt; | |
1555 | /* Change dynamic info of ifunc gotplt from srelplt to srelgot. */ | |
1556 | relplt = htab->srelgot; | |
1557 | ||
1558 | /* If this is the first plt entry and PLT is used, make room for | |
1559 | the special first entry. */ | |
1560 | if (plt->size == 0 && use_plt) | |
1561 | plt->size += plt_header_size; | |
1562 | } | |
1563 | else | |
1564 | { | |
1565 | plt = htab->iplt; | |
1566 | gotplt = htab->igotplt; | |
1567 | relplt = htab->irelplt; | |
1568 | } | |
1569 | ||
1570 | if (use_plt) | |
1571 | { | |
1572 | /* Don't update value of STT_GNU_IFUNC symbol to PLT. We need | |
1573 | the original value for R_*_IRELATIVE. */ | |
1574 | h->plt.offset = plt->size; | |
1575 | ||
1576 | /* Make room for this entry in the plt/iplt section. */ | |
1577 | plt->size += plt_entry_size; | |
1578 | ||
1579 | /* We also need to make an entry in the got.plt/got.iplt section, | |
1580 | which will be placed in the got section by the linker script. */ | |
1581 | gotplt->size += got_entry_size; | |
1582 | } | |
1583 | ||
1584 | /* We also need to make an entry in the rela.plt/.rela.iplt | |
1585 | section for GOTPLT relocation if PLT is used. */ | |
1586 | if (use_plt) | |
1587 | { | |
1588 | relplt->size += sizeof_reloc; | |
1589 | relplt->reloc_count++; | |
1590 | } | |
1591 | ||
1592 | /* We need dynamic relocation for STT_GNU_IFUNC symbol only when | |
1593 | there is a non-GOT reference in a PIC object or PLT isn't used. */ | |
1594 | if (!need_dynreloc || !h->non_got_ref) | |
1595 | *head = NULL; | |
1596 | ||
1597 | /* Finally, allocate space. */ | |
1598 | p = *head; | |
1599 | if (p != NULL) | |
1600 | { | |
1601 | bfd_size_type count = 0; | |
1602 | do | |
1603 | { | |
1604 | count += p->count; | |
1605 | p = p->next; | |
1606 | } | |
1607 | while (p != NULL); | |
1608 | ||
1609 | htab->ifunc_resolvers = count != 0; | |
1610 | ||
1611 | /* Dynamic relocations are stored in | |
1612 | 1. rela.srelgot section in PIC object. | |
1613 | 2. rela.srelgot section in dynamic executable. | |
1614 | 3. rela.irelplt section in static executable. */ | |
1615 | if (htab->splt != NULL) | |
1616 | htab->srelgot->size += count * sizeof_reloc; | |
1617 | else | |
1618 | { | |
1619 | relplt->size += count * sizeof_reloc; | |
1620 | relplt->reloc_count += count; | |
1621 | } | |
1622 | } | |
1623 | ||
1624 | /* For STT_GNU_IFUNC symbol, got.plt has the real function address | |
1625 | and got has the PLT entry adddress. We will load the GOT entry | |
1626 | with the PLT entry in finish_dynamic_symbol if it is used. For | |
1627 | branch, it uses got.plt. For symbol value, if PLT is used, | |
1628 | 1. Use got.plt in a PIC object if it is forced local or not | |
1629 | dynamic. | |
1630 | 2. Use got.plt in a non-PIC object if pointer equality isn't | |
1631 | needed. | |
1632 | 3. Use got.plt in PIE. | |
1633 | 4. Use got.plt if got isn't used. | |
1634 | 5. Otherwise use got so that it can be shared among different | |
1635 | objects at run-time. | |
1636 | If PLT isn't used, always use got for symbol value. | |
1637 | We only need to relocate got entry in PIC object or in dynamic | |
1638 | executable without PLT. */ | |
1639 | if (use_plt | |
1640 | && (h->got.refcount <= 0 | |
1641 | || (bfd_link_pic (info) | |
1642 | && (h->dynindx == -1 | |
1643 | || h->forced_local)) | |
1644 | || ( | |
1645 | !h->pointer_equality_needed) | |
1646 | || htab->sgot == NULL)) | |
1647 | { | |
1648 | /* Use got.plt. */ | |
1649 | h->got.offset = (bfd_vma) -1; | |
1650 | } | |
1651 | else | |
1652 | { | |
1653 | if (!use_plt) | |
1654 | { | |
1655 | /* PLT isn't used. */ | |
1656 | h->plt.offset = (bfd_vma) -1; | |
1657 | } | |
1658 | if (h->got.refcount <= 0) | |
1659 | { | |
1660 | /* GOT isn't need when there are only relocations for static | |
1661 | pointers. */ | |
1662 | h->got.offset = (bfd_vma) -1; | |
1663 | } | |
1664 | else | |
1665 | { | |
1666 | h->got.offset = htab->sgot->size; | |
1667 | htab->sgot->size += got_entry_size; | |
1668 | /* Need to relocate the GOT entry in a PIC object or PLT isn't | |
1669 | used. Otherwise, the GOT entry will be filled with the PLT | |
1670 | entry and dynamic GOT relocation isn't needed. */ | |
1671 | if (need_dynreloc) | |
1672 | { | |
1673 | /* For non-static executable, dynamic GOT relocation is in | |
1674 | rela.got section, but for static executable, it is | |
1675 | in rela.iplt section. */ | |
1676 | if (htab->splt != NULL) | |
1677 | htab->srelgot->size += sizeof_reloc; | |
1678 | else | |
1679 | { | |
1680 | relplt->size += sizeof_reloc; | |
1681 | relplt->reloc_count++; | |
1682 | } | |
1683 | } | |
1684 | } | |
1685 | } | |
1686 | ||
1687 | return true; | |
1688 | } | |
1689 | ||
d218dba3 | 1690 | /* Allocate space in .plt, .got and associated reloc sections for |
1691 | ifunc dynamic relocs. */ | |
1692 | ||
1693 | static bool | |
6d13722a | 1694 | elfNN_allocate_ifunc_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
d218dba3 | 1695 | { |
1696 | struct bfd_link_info *info; | |
1697 | /* An example of a bfd_link_hash_indirect symbol is versioned | |
1698 | symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect) | |
1699 | -> __gxx_personality_v0(bfd_link_hash_defined) | |
1700 | ||
1701 | There is no need to process bfd_link_hash_indirect symbols here | |
1702 | because we will also be presented with the concrete instance of | |
1703 | the symbol and loongarch_elf_copy_indirect_symbol () will have been | |
1704 | called to copy all relevant data from the generic to the concrete | |
1705 | symbol instance. */ | |
1706 | if (h->root.type == bfd_link_hash_indirect) | |
1707 | return true; | |
1708 | ||
1709 | if (h->root.type == bfd_link_hash_warning) | |
1710 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1711 | ||
1712 | info = (struct bfd_link_info *) inf; | |
1713 | ||
1714 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it | |
1715 | here if it is defined and referenced in a non-shared object. */ | |
6d13722a | 1716 | if (h->type == STT_GNU_IFUNC && h->def_regular) |
bc2a35c0 | 1717 | { |
1718 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
1719 | return local_allocate_ifunc_dyn_relocs (info, h, | |
1720 | &h->dyn_relocs, | |
1721 | PLT_ENTRY_SIZE, | |
1722 | PLT_HEADER_SIZE, | |
1723 | GOT_ENTRY_SIZE, | |
1724 | false); | |
1725 | else | |
1726 | return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, | |
1727 | &h->dyn_relocs, | |
1728 | PLT_ENTRY_SIZE, | |
1729 | PLT_HEADER_SIZE, | |
1730 | GOT_ENTRY_SIZE, | |
1731 | false); | |
1732 | } | |
6d13722a | 1733 | |
d218dba3 | 1734 | return true; |
1735 | } | |
1736 | ||
1737 | /* Allocate space in .plt, .got and associated reloc sections for | |
1738 | ifunc dynamic relocs. */ | |
1739 | ||
b5c37946 | 1740 | static int |
6d13722a | 1741 | elfNN_allocate_local_ifunc_dynrelocs (void **slot, void *inf) |
e214f8db | 1742 | { |
1743 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) *slot; | |
1744 | ||
d218dba3 | 1745 | if (h->type != STT_GNU_IFUNC |
1746 | || !h->def_regular | |
1747 | || !h->ref_regular | |
1748 | || !h->forced_local | |
e214f8db | 1749 | || h->root.type != bfd_link_hash_defined) |
1750 | abort (); | |
1751 | ||
6d13722a | 1752 | return elfNN_allocate_ifunc_dynrelocs (h, inf); |
e214f8db | 1753 | } |
1754 | ||
1755 | /* Set DF_TEXTREL if we find any dynamic relocs that apply to | |
1756 | read-only sections. */ | |
1757 | ||
1758 | static bool | |
1759 | maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p) | |
1760 | { | |
1761 | asection *sec; | |
1762 | ||
1763 | if (h->root.type == bfd_link_hash_indirect) | |
1764 | return true; | |
1765 | ||
1766 | sec = readonly_dynrelocs (h); | |
1767 | if (sec != NULL) | |
1768 | { | |
1769 | struct bfd_link_info *info = (struct bfd_link_info *) info_p; | |
1770 | ||
1771 | info->flags |= DF_TEXTREL; | |
1772 | info->callbacks->minfo (_("%pB: dynamic relocation against `%pT' in " | |
1773 | "read-only section `%pA'\n"), | |
1774 | sec->owner, h->root.root.string, sec); | |
1775 | ||
1776 | /* Not an error, just cut short the traversal. */ | |
1777 | return false; | |
1778 | } | |
1779 | return true; | |
1780 | } | |
1781 | ||
1782 | static bool | |
af969b14 AM |
1783 | loongarch_elf_late_size_sections (bfd *output_bfd, |
1784 | struct bfd_link_info *info) | |
e214f8db | 1785 | { |
1786 | struct loongarch_elf_link_hash_table *htab; | |
1787 | bfd *dynobj; | |
1788 | asection *s; | |
1789 | bfd *ibfd; | |
1790 | ||
1791 | htab = loongarch_elf_hash_table (info); | |
1792 | BFD_ASSERT (htab != NULL); | |
1793 | dynobj = htab->elf.dynobj; | |
af969b14 AM |
1794 | if (dynobj == NULL) |
1795 | return true; | |
e214f8db | 1796 | |
1797 | if (htab->elf.dynamic_sections_created) | |
1798 | { | |
1799 | /* Set the contents of the .interp section to the interpreter. */ | |
1800 | if (bfd_link_executable (info) && !info->nointerp) | |
1801 | { | |
1802 | const char *interpreter; | |
e214f8db | 1803 | s = bfd_get_linker_section (dynobj, ".interp"); |
1804 | BFD_ASSERT (s != NULL); | |
c4a7e6b5 | 1805 | |
1806 | if (elf_elfheader (output_bfd)->e_ident[EI_CLASS] == ELFCLASS32) | |
e214f8db | 1807 | interpreter = "/lib32/ld.so.1"; |
c4a7e6b5 | 1808 | else if (elf_elfheader (output_bfd)->e_ident[EI_CLASS] == ELFCLASS64) |
e214f8db | 1809 | interpreter = "/lib64/ld.so.1"; |
1810 | else | |
1811 | interpreter = "/lib/ld.so.1"; | |
c4a7e6b5 | 1812 | |
e214f8db | 1813 | s->contents = (unsigned char *) interpreter; |
1814 | s->size = strlen (interpreter) + 1; | |
1815 | } | |
1816 | } | |
1817 | ||
1818 | /* Set up .got offsets for local syms, and space for local dynamic | |
1819 | relocs. */ | |
1820 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) | |
1821 | { | |
1822 | bfd_signed_vma *local_got; | |
1823 | bfd_signed_vma *end_local_got; | |
1824 | char *local_tls_type; | |
1825 | bfd_size_type locsymcount; | |
1826 | Elf_Internal_Shdr *symtab_hdr; | |
1827 | asection *srel; | |
1828 | ||
1829 | if (!is_loongarch_elf (ibfd)) | |
1830 | continue; | |
1831 | ||
1832 | for (s = ibfd->sections; s != NULL; s = s->next) | |
1833 | { | |
1834 | struct elf_dyn_relocs *p; | |
1835 | ||
1836 | for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) | |
1837 | { | |
1838 | p->count -= p->pc_count; | |
1839 | if (!bfd_is_abs_section (p->sec) | |
1840 | && bfd_is_abs_section (p->sec->output_section)) | |
1841 | { | |
1842 | /* Input section has been discarded, either because | |
1843 | it is a copy of a linkonce section or due to | |
1844 | linker script /DISCARD/, so we'll be discarding | |
1845 | the relocs too. */ | |
1846 | } | |
1847 | else if (0 < p->count) | |
1848 | { | |
1849 | srel = elf_section_data (p->sec)->sreloc; | |
1850 | srel->size += p->count * sizeof (ElfNN_External_Rela); | |
1851 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) | |
1852 | info->flags |= DF_TEXTREL; | |
1853 | } | |
1854 | } | |
1855 | } | |
1856 | ||
1857 | local_got = elf_local_got_refcounts (ibfd); | |
1858 | if (!local_got) | |
1859 | continue; | |
1860 | ||
1861 | symtab_hdr = &elf_symtab_hdr (ibfd); | |
1862 | locsymcount = symtab_hdr->sh_info; | |
1863 | end_local_got = local_got + locsymcount; | |
1864 | local_tls_type = _bfd_loongarch_elf_local_got_tls_type (ibfd); | |
1865 | s = htab->elf.sgot; | |
1866 | srel = htab->elf.srelgot; | |
1867 | for (; local_got < end_local_got; ++local_got, ++local_tls_type) | |
1868 | { | |
1869 | if (0 < *local_got) | |
1870 | { | |
1871 | *local_got = s->size; | |
4f248d61 LC |
1872 | if (*local_tls_type & (GOT_TLS_GD | GOT_TLS_IE | GOT_TLS_GDESC)) |
1873 | { | |
1874 | /* TLS gd use two got. */ | |
1875 | if (*local_tls_type & GOT_TLS_GD) | |
1876 | { | |
1877 | s->size += 2 * GOT_ENTRY_SIZE; | |
1878 | if (!bfd_link_executable (info)) | |
1879 | srel->size += sizeof (ElfNN_External_Rela); | |
1880 | } | |
e214f8db | 1881 | |
4f248d61 LC |
1882 | /* TLS_DESC use two got. */ |
1883 | if (*local_tls_type & GOT_TLS_GDESC) | |
1884 | { | |
1885 | s->size += 2 * GOT_ENTRY_SIZE; | |
1886 | srel->size += sizeof (ElfNN_External_Rela); | |
1887 | } | |
e214f8db | 1888 | |
4f248d61 LC |
1889 | /* TLS ie and use one got. */ |
1890 | if (*local_tls_type & GOT_TLS_IE) | |
1891 | { | |
1892 | s->size += GOT_ENTRY_SIZE; | |
1893 | if (!bfd_link_executable (info)) | |
1894 | srel->size += sizeof (ElfNN_External_Rela); | |
1895 | } | |
1896 | } | |
6d13722a | 1897 | else |
1898 | { | |
4f248d61 | 1899 | s->size += GOT_ENTRY_SIZE; |
6d13722a | 1900 | srel->size += sizeof (ElfNN_External_Rela); |
1901 | } | |
e214f8db | 1902 | } |
1903 | else | |
1904 | *local_got = MINUS_ONE; | |
1905 | } | |
1906 | } | |
1907 | ||
1908 | /* Allocate global sym .plt and .got entries, and space for global | |
1909 | sym dynamic relocs. */ | |
1910 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info); | |
d218dba3 | 1911 | |
1912 | /* Allocate global ifunc sym .plt and .got entries, and space for global | |
1913 | ifunc sym dynamic relocs. */ | |
6d13722a | 1914 | elf_link_hash_traverse (&htab->elf, elfNN_allocate_ifunc_dynrelocs, info); |
d218dba3 | 1915 | |
e214f8db | 1916 | /* Allocate .plt and .got entries, and space for local ifunc symbols. */ |
1917 | htab_traverse (htab->loc_hash_table, | |
b5c37946 | 1918 | elfNN_allocate_local_ifunc_dynrelocs, info); |
e214f8db | 1919 | |
1920 | /* Don't allocate .got.plt section if there are no PLT. */ | |
1921 | if (htab->elf.sgotplt && htab->elf.sgotplt->size == GOTPLT_HEADER_SIZE | |
1922 | && (htab->elf.splt == NULL || htab->elf.splt->size == 0)) | |
1923 | htab->elf.sgotplt->size = 0; | |
1924 | ||
1925 | /* The check_relocs and adjust_dynamic_symbol entry points have | |
1926 | determined the sizes of the various dynamic sections. Allocate | |
1927 | memory for them. */ | |
1928 | for (s = dynobj->sections; s != NULL; s = s->next) | |
1929 | { | |
1930 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
1931 | continue; | |
1932 | ||
1933 | if (s == htab->elf.splt || s == htab->elf.iplt || s == htab->elf.sgot | |
1934 | || s == htab->elf.sgotplt || s == htab->elf.igotplt | |
1935 | || s == htab->elf.sdynbss || s == htab->elf.sdynrelro) | |
1936 | { | |
1937 | /* Strip this section if we don't need it; see the | |
1938 | comment below. */ | |
1939 | } | |
1940 | else if (strncmp (s->name, ".rela", 5) == 0) | |
1941 | { | |
1942 | if (s->size != 0) | |
1943 | { | |
1944 | /* We use the reloc_count field as a counter if we need | |
1945 | to copy relocs into the output file. */ | |
1946 | s->reloc_count = 0; | |
1947 | } | |
1948 | } | |
1949 | else | |
1950 | { | |
1951 | /* It's not one of our sections. */ | |
1952 | continue; | |
1953 | } | |
1954 | ||
1955 | if (s->size == 0) | |
1956 | { | |
1957 | /* If we don't need this section, strip it from the | |
1958 | output file. This is mostly to handle .rela.bss and | |
1959 | .rela.plt. We must create both sections in | |
1960 | create_dynamic_sections, because they must be created | |
1961 | before the linker maps input sections to output | |
1962 | sections. The linker does that before | |
1963 | adjust_dynamic_symbol is called, and it is that | |
1964 | function which decides whether anything needs to go | |
1965 | into these sections. */ | |
1966 | s->flags |= SEC_EXCLUDE; | |
1967 | continue; | |
1968 | } | |
1969 | ||
1970 | if ((s->flags & SEC_HAS_CONTENTS) == 0) | |
1971 | continue; | |
1972 | ||
1973 | /* Allocate memory for the section contents. Zero the memory | |
1974 | for the benefit of .rela.plt, which has 4 unused entries | |
1975 | at the beginning, and we don't want garbage. */ | |
1976 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); | |
1977 | if (s->contents == NULL) | |
1978 | return false; | |
1979 | } | |
1980 | ||
1981 | if (elf_hash_table (info)->dynamic_sections_created) | |
1982 | { | |
1983 | /* Add some entries to the .dynamic section. We fill in the | |
1984 | values later, in loongarch_elf_finish_dynamic_sections, but we | |
1985 | must add the entries now so that we get the correct size for | |
1986 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
1987 | dynamic linker and used by the debugger. */ | |
1988 | #define add_dynamic_entry(TAG, VAL) _bfd_elf_add_dynamic_entry (info, TAG, VAL) | |
1989 | ||
1990 | if (bfd_link_executable (info)) | |
1991 | { | |
1992 | if (!add_dynamic_entry (DT_DEBUG, 0)) | |
1993 | return false; | |
1994 | } | |
1995 | ||
1996 | if (htab->elf.srelplt->size != 0) | |
1997 | { | |
1998 | if (!add_dynamic_entry (DT_PLTGOT, 0) | |
1999 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
2000 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
2001 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
2002 | return false; | |
2003 | } | |
2004 | ||
2005 | if (!add_dynamic_entry (DT_RELA, 0) | |
2006 | || !add_dynamic_entry (DT_RELASZ, 0) | |
2007 | || !add_dynamic_entry (DT_RELAENT, sizeof (ElfNN_External_Rela))) | |
2008 | return false; | |
2009 | ||
2010 | /* If any dynamic relocs apply to a read-only section, | |
2011 | then we need a DT_TEXTREL entry. */ | |
2012 | if ((info->flags & DF_TEXTREL) == 0) | |
2013 | elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info); | |
2014 | ||
2015 | if (info->flags & DF_TEXTREL) | |
2016 | { | |
2017 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
2018 | return false; | |
2019 | /* Clear the DF_TEXTREL flag. It will be set again if we | |
2020 | write out an actual text relocation; we may not, because | |
2021 | at this point we do not know whether e.g. any .eh_frame | |
2022 | absolute relocations have been converted to PC-relative. */ | |
2023 | info->flags &= ~DF_TEXTREL; | |
2024 | } | |
2025 | } | |
2026 | #undef add_dynamic_entry | |
2027 | ||
2028 | return true; | |
2029 | } | |
2030 | ||
2031 | #define LARCH_LD_STACK_DEPTH 16 | |
2032 | static int64_t larch_opc_stack[LARCH_LD_STACK_DEPTH]; | |
2033 | static size_t larch_stack_top = 0; | |
2034 | ||
2035 | static bfd_reloc_status_type | |
2036 | loongarch_push (int64_t val) | |
2037 | { | |
2038 | if (LARCH_LD_STACK_DEPTH <= larch_stack_top) | |
2039 | return bfd_reloc_outofrange; | |
2040 | larch_opc_stack[larch_stack_top++] = val; | |
2041 | return bfd_reloc_ok; | |
2042 | } | |
2043 | ||
2044 | static bfd_reloc_status_type | |
2045 | loongarch_pop (int64_t *val) | |
2046 | { | |
2047 | if (larch_stack_top == 0) | |
2048 | return bfd_reloc_outofrange; | |
2049 | BFD_ASSERT (val); | |
2050 | *val = larch_opc_stack[--larch_stack_top]; | |
2051 | return bfd_reloc_ok; | |
2052 | } | |
2053 | ||
2054 | static bfd_reloc_status_type | |
2055 | loongarch_top (int64_t *val) | |
2056 | { | |
2057 | if (larch_stack_top == 0) | |
2058 | return bfd_reloc_outofrange; | |
2059 | BFD_ASSERT (val); | |
2060 | *val = larch_opc_stack[larch_stack_top - 1]; | |
2061 | return bfd_reloc_ok; | |
2062 | } | |
2063 | ||
2064 | static void | |
2065 | loongarch_elf_append_rela (bfd *abfd, asection *s, Elf_Internal_Rela *rel) | |
2066 | { | |
6d13722a | 2067 | BFD_ASSERT (s && s->contents); |
e214f8db | 2068 | const struct elf_backend_data *bed; |
2069 | bfd_byte *loc; | |
2070 | ||
2071 | bed = get_elf_backend_data (abfd); | |
6d13722a | 2072 | if (!(s->size > s->reloc_count * bed->s->sizeof_rela)) |
2073 | BFD_ASSERT (s->size > s->reloc_count * bed->s->sizeof_rela); | |
e214f8db | 2074 | loc = s->contents + (s->reloc_count++ * bed->s->sizeof_rela); |
2075 | bed->s->swap_reloca_out (abfd, rel, loc); | |
2076 | } | |
2077 | ||
2078 | /* Check rel->r_offset in range of contents. */ | |
2079 | static bfd_reloc_status_type | |
2080 | loongarch_check_offset (const Elf_Internal_Rela *rel, | |
2081 | const asection *input_section) | |
2082 | { | |
2083 | if (0 == strcmp(input_section->name, ".text") | |
2084 | && rel->r_offset > input_section->size) | |
2085 | return bfd_reloc_overflow; | |
2086 | ||
2087 | return bfd_reloc_ok; | |
2088 | } | |
2089 | ||
e214f8db | 2090 | #define LARCH_RELOC_PERFORM_3OP(op1, op2, op3) \ |
2091 | ({ \ | |
2092 | bfd_reloc_status_type ret = loongarch_pop (&op2); \ | |
2093 | if (ret == bfd_reloc_ok) \ | |
2094 | { \ | |
2095 | ret = loongarch_pop (&op1); \ | |
2096 | if (ret == bfd_reloc_ok) \ | |
2097 | ret = loongarch_push (op3); \ | |
2098 | } \ | |
2099 | ret; \ | |
2100 | }) | |
2101 | ||
dc5f359e | 2102 | /* Write immediate to instructions. */ |
2103 | ||
e214f8db | 2104 | static bfd_reloc_status_type |
2105 | loongarch_reloc_rewrite_imm_insn (const Elf_Internal_Rela *rel, | |
2106 | const asection *input_section ATTRIBUTE_UNUSED, | |
2107 | reloc_howto_type *howto, bfd *input_bfd, | |
748594bc | 2108 | bfd_byte *contents, bfd_vma reloc_val) |
e214f8db | 2109 | { |
dc5f359e | 2110 | /* Adjust the immediate based on alignment and |
2111 | its position in the instruction. */ | |
1b6fccd2 | 2112 | if (!loongarch_adjust_reloc_bitsfield (input_bfd, howto, &reloc_val)) |
748594bc | 2113 | return bfd_reloc_overflow; |
2114 | ||
dc5f359e | 2115 | int bits = bfd_get_reloc_size (howto) * 8; |
2116 | uint64_t insn = bfd_get (bits, input_bfd, contents + rel->r_offset); | |
2117 | ||
2118 | /* Write immediate to instruction. */ | |
2119 | insn = (insn & ~howto->dst_mask) | (reloc_val & howto->dst_mask); | |
748594bc | 2120 | |
e214f8db | 2121 | bfd_put (bits, input_bfd, insn, contents + rel->r_offset); |
2122 | ||
2123 | return bfd_reloc_ok; | |
2124 | } | |
2125 | ||
e214f8db | 2126 | static bfd_reloc_status_type |
2127 | perform_relocation (const Elf_Internal_Rela *rel, asection *input_section, | |
2128 | reloc_howto_type *howto, bfd_vma value, | |
2129 | bfd *input_bfd, bfd_byte *contents) | |
2130 | { | |
e214f8db | 2131 | int64_t opr1, opr2, opr3; |
2132 | bfd_reloc_status_type r = bfd_reloc_ok; | |
2133 | int bits = bfd_get_reloc_size (howto) * 8; | |
2134 | ||
e214f8db | 2135 | switch (ELFNN_R_TYPE (rel->r_info)) |
2136 | { | |
2137 | case R_LARCH_SOP_PUSH_PCREL: | |
2138 | case R_LARCH_SOP_PUSH_ABSOLUTE: | |
2139 | case R_LARCH_SOP_PUSH_GPREL: | |
2140 | case R_LARCH_SOP_PUSH_TLS_TPREL: | |
2141 | case R_LARCH_SOP_PUSH_TLS_GOT: | |
2142 | case R_LARCH_SOP_PUSH_TLS_GD: | |
2143 | case R_LARCH_SOP_PUSH_PLT_PCREL: | |
2144 | r = loongarch_push (value); | |
2145 | break; | |
2146 | ||
2147 | case R_LARCH_SOP_PUSH_DUP: | |
2148 | r = loongarch_pop (&opr1); | |
2149 | if (r == bfd_reloc_ok) | |
2150 | { | |
2151 | r = loongarch_push (opr1); | |
2152 | if (r == bfd_reloc_ok) | |
2153 | r = loongarch_push (opr1); | |
2154 | } | |
2155 | break; | |
2156 | ||
2157 | case R_LARCH_SOP_ASSERT: | |
2158 | r = loongarch_pop (&opr1); | |
2159 | if (r != bfd_reloc_ok || !opr1) | |
2160 | r = bfd_reloc_notsupported; | |
2161 | break; | |
2162 | ||
2163 | case R_LARCH_SOP_NOT: | |
2164 | r = loongarch_pop (&opr1); | |
2165 | if (r == bfd_reloc_ok) | |
2166 | r = loongarch_push (!opr1); | |
2167 | break; | |
2168 | ||
2169 | case R_LARCH_SOP_SUB: | |
2170 | r = LARCH_RELOC_PERFORM_3OP (opr1, opr2, opr1 - opr2); | |
2171 | break; | |
2172 | ||
2173 | case R_LARCH_SOP_SL: | |
2174 | r = LARCH_RELOC_PERFORM_3OP (opr1, opr2, opr1 << opr2); | |
2175 | break; | |
2176 | ||
2177 | case R_LARCH_SOP_SR: | |
2178 | r = LARCH_RELOC_PERFORM_3OP (opr1, opr2, opr1 >> opr2); | |
2179 | break; | |
2180 | ||
2181 | case R_LARCH_SOP_AND: | |
2182 | r = LARCH_RELOC_PERFORM_3OP (opr1, opr2, opr1 & opr2); | |
2183 | break; | |
2184 | ||
2185 | case R_LARCH_SOP_ADD: | |
2186 | r = LARCH_RELOC_PERFORM_3OP (opr1, opr2, opr1 + opr2); | |
2187 | break; | |
2188 | ||
2189 | case R_LARCH_SOP_IF_ELSE: | |
2190 | r = loongarch_pop (&opr3); | |
2191 | if (r == bfd_reloc_ok) | |
2192 | { | |
2193 | r = loongarch_pop (&opr2); | |
2194 | if (r == bfd_reloc_ok) | |
2195 | { | |
2196 | r = loongarch_pop (&opr1); | |
2197 | if (r == bfd_reloc_ok) | |
2198 | r = loongarch_push (opr1 ? opr2 : opr3); | |
2199 | } | |
2200 | } | |
2201 | break; | |
2202 | ||
2203 | case R_LARCH_SOP_POP_32_S_10_5: | |
2204 | case R_LARCH_SOP_POP_32_S_10_12: | |
2205 | case R_LARCH_SOP_POP_32_S_10_16: | |
2206 | case R_LARCH_SOP_POP_32_S_10_16_S2: | |
6d13722a | 2207 | case R_LARCH_SOP_POP_32_S_0_5_10_16_S2: |
2208 | case R_LARCH_SOP_POP_32_S_0_10_10_16_S2: | |
e214f8db | 2209 | case R_LARCH_SOP_POP_32_S_5_20: |
e214f8db | 2210 | case R_LARCH_SOP_POP_32_U_10_12: |
748594bc | 2211 | case R_LARCH_SOP_POP_32_U: |
e214f8db | 2212 | r = loongarch_pop (&opr1); |
2213 | if (r != bfd_reloc_ok) | |
2214 | break; | |
2215 | r = loongarch_check_offset (rel, input_section); | |
2216 | if (r != bfd_reloc_ok) | |
2217 | break; | |
2218 | ||
2219 | r = loongarch_reloc_rewrite_imm_insn (rel, input_section, | |
2220 | howto, input_bfd, | |
748594bc | 2221 | contents, (bfd_vma)opr1); |
e214f8db | 2222 | break; |
2223 | ||
e214f8db | 2224 | case R_LARCH_TLS_DTPREL32: |
2225 | case R_LARCH_32: | |
2226 | case R_LARCH_TLS_DTPREL64: | |
2227 | case R_LARCH_64: | |
2228 | r = loongarch_check_offset (rel, input_section); | |
2229 | if (r != bfd_reloc_ok) | |
2230 | break; | |
2231 | ||
2232 | bfd_put (bits, input_bfd, value, contents + rel->r_offset); | |
2233 | break; | |
2234 | ||
1b6fccd2 | 2235 | /* LoongArch only has add/sub reloc pair, not has set/sub reloc pair. |
2236 | Because set/sub reloc pair not support multi-thread. While add/sub | |
2237 | reloc pair process order not affect the final result. | |
2238 | ||
2239 | For add/sub reloc, the original value will be involved in the | |
2240 | calculation. In order not to add/sub extra value, we write 0 to symbol | |
2241 | address at assembly time. | |
2242 | ||
2243 | add/sub reloc bits determined by the value after symbol subtraction, | |
2244 | not symbol value. | |
2245 | ||
2246 | add/sub reloc save part of the symbol value, so we only need to | |
2247 | save howto->dst_mask bits. */ | |
2248 | case R_LARCH_ADD6: | |
2249 | case R_LARCH_SUB6: | |
2250 | { | |
2251 | bfd_vma word = bfd_get (howto->bitsize, input_bfd, | |
2252 | contents + rel->r_offset); | |
2253 | word = (word & ~howto->dst_mask) | (value & howto->dst_mask); | |
2254 | bfd_put (howto->bitsize, input_bfd, word, contents + rel->r_offset); | |
2255 | r = bfd_reloc_ok; | |
2256 | break; | |
2257 | } | |
2258 | ||
2259 | /* Not need to read the original value, just write the new value. */ | |
e214f8db | 2260 | case R_LARCH_ADD8: |
2261 | case R_LARCH_ADD16: | |
2262 | case R_LARCH_ADD24: | |
2263 | case R_LARCH_ADD32: | |
2264 | case R_LARCH_ADD64: | |
e214f8db | 2265 | case R_LARCH_SUB8: |
2266 | case R_LARCH_SUB16: | |
2267 | case R_LARCH_SUB24: | |
2268 | case R_LARCH_SUB32: | |
2269 | case R_LARCH_SUB64: | |
1b6fccd2 | 2270 | { |
2271 | /* Because add/sub reloc is processed separately, | |
2272 | so the high bits is invalid. */ | |
2273 | bfd_vma word = value & howto->dst_mask; | |
2274 | bfd_put (howto->bitsize, input_bfd, word, contents + rel->r_offset); | |
2275 | r = bfd_reloc_ok; | |
e214f8db | 2276 | break; |
1b6fccd2 | 2277 | } |
e214f8db | 2278 | |
1b6fccd2 | 2279 | case R_LARCH_ADD_ULEB128: |
2280 | case R_LARCH_SUB_ULEB128: | |
2281 | { | |
2282 | unsigned int len = 0; | |
2283 | /* Before write uleb128, first read it to get it's length. */ | |
2284 | _bfd_read_unsigned_leb128 (input_bfd, contents + rel->r_offset, &len); | |
2285 | loongarch_write_unsigned_leb128 (contents + rel->r_offset, len, value); | |
2286 | r = bfd_reloc_ok; | |
2287 | break; | |
2288 | } | |
e214f8db | 2289 | |
98011207 | 2290 | /* For eh_frame and debug info. */ |
2291 | case R_LARCH_32_PCREL: | |
be1ebb67 | 2292 | case R_LARCH_64_PCREL: |
1b6fccd2 | 2293 | { |
2294 | value -= sec_addr (input_section) + rel->r_offset; | |
2295 | value += rel->r_addend; | |
2296 | bfd_vma word = bfd_get (howto->bitsize, input_bfd, | |
2297 | contents + rel->r_offset); | |
2298 | word = (word & ~howto->dst_mask) | (value & howto->dst_mask); | |
2299 | bfd_put (howto->bitsize, input_bfd, word, contents + rel->r_offset); | |
2300 | r = bfd_reloc_ok; | |
2301 | break; | |
2302 | } | |
98011207 | 2303 | |
6d13722a | 2304 | /* New reloc type. |
2305 | R_LARCH_B16 ~ R_LARCH_TLS_GD_HI20. */ | |
2306 | case R_LARCH_B16: | |
2307 | case R_LARCH_B21: | |
2308 | case R_LARCH_B26: | |
2309 | case R_LARCH_ABS_HI20: | |
2310 | case R_LARCH_ABS_LO12: | |
2311 | case R_LARCH_ABS64_LO20: | |
2312 | case R_LARCH_ABS64_HI12: | |
2313 | case R_LARCH_PCALA_HI20: | |
2314 | case R_LARCH_PCALA_LO12: | |
2315 | case R_LARCH_PCALA64_LO20: | |
2316 | case R_LARCH_PCALA64_HI12: | |
2317 | case R_LARCH_GOT_PC_HI20: | |
2318 | case R_LARCH_GOT_PC_LO12: | |
2319 | case R_LARCH_GOT64_PC_LO20: | |
2320 | case R_LARCH_GOT64_PC_HI12: | |
2321 | case R_LARCH_GOT_HI20: | |
2322 | case R_LARCH_GOT_LO12: | |
2323 | case R_LARCH_GOT64_LO20: | |
2324 | case R_LARCH_GOT64_HI12: | |
2325 | case R_LARCH_TLS_LE_HI20: | |
2326 | case R_LARCH_TLS_LE_LO12: | |
aae8784c | 2327 | case R_LARCH_TLS_LE_HI20_R: |
2328 | case R_LARCH_TLS_LE_LO12_R: | |
6d13722a | 2329 | case R_LARCH_TLS_LE64_LO20: |
2330 | case R_LARCH_TLS_LE64_HI12: | |
2331 | case R_LARCH_TLS_IE_PC_HI20: | |
2332 | case R_LARCH_TLS_IE_PC_LO12: | |
2333 | case R_LARCH_TLS_IE64_PC_LO20: | |
2334 | case R_LARCH_TLS_IE64_PC_HI12: | |
2335 | case R_LARCH_TLS_IE_HI20: | |
2336 | case R_LARCH_TLS_IE_LO12: | |
2337 | case R_LARCH_TLS_IE64_LO20: | |
2338 | case R_LARCH_TLS_IE64_HI12: | |
2339 | case R_LARCH_TLS_LD_PC_HI20: | |
2340 | case R_LARCH_TLS_LD_HI20: | |
2341 | case R_LARCH_TLS_GD_PC_HI20: | |
2342 | case R_LARCH_TLS_GD_HI20: | |
1b6fccd2 | 2343 | case R_LARCH_PCREL20_S2: |
dc5f359e | 2344 | case R_LARCH_CALL36: |
4f248d61 LC |
2345 | case R_LARCH_TLS_DESC_PC_HI20: |
2346 | case R_LARCH_TLS_DESC_PC_LO12: | |
2347 | case R_LARCH_TLS_DESC64_PC_LO20: | |
2348 | case R_LARCH_TLS_DESC64_PC_HI12: | |
2349 | case R_LARCH_TLS_DESC_HI20: | |
2350 | case R_LARCH_TLS_DESC_LO12: | |
2351 | case R_LARCH_TLS_DESC64_LO20: | |
2352 | case R_LARCH_TLS_DESC64_HI12: | |
ae296cc4 | 2353 | case R_LARCH_TLS_LD_PCREL20_S2: |
2354 | case R_LARCH_TLS_GD_PCREL20_S2: | |
2355 | case R_LARCH_TLS_DESC_PCREL20_S2: | |
6d13722a | 2356 | r = loongarch_check_offset (rel, input_section); |
2357 | if (r != bfd_reloc_ok) | |
2358 | break; | |
2359 | ||
2360 | r = loongarch_reloc_rewrite_imm_insn (rel, input_section, | |
2361 | howto, input_bfd, | |
2362 | contents, value); | |
2363 | break; | |
2364 | ||
4f248d61 LC |
2365 | case R_LARCH_TLS_DESC_LD: |
2366 | case R_LARCH_TLS_DESC_CALL: | |
2367 | r = bfd_reloc_ok; | |
2368 | break; | |
2369 | ||
6d13722a | 2370 | case R_LARCH_RELAX: |
aae8784c | 2371 | case R_LARCH_TLS_LE_ADD_R: |
6d13722a | 2372 | break; |
2373 | ||
e214f8db | 2374 | default: |
2375 | r = bfd_reloc_notsupported; | |
2376 | } | |
2377 | return r; | |
2378 | } | |
2379 | ||
2380 | #define LARCH_RECENT_RELOC_QUEUE_LENGTH 72 | |
2381 | static struct | |
2382 | { | |
2383 | bfd *bfd; | |
2384 | asection *section; | |
2385 | bfd_vma r_offset; | |
2386 | int r_type; | |
2387 | bfd_vma relocation; | |
2388 | Elf_Internal_Sym *sym; | |
2389 | struct elf_link_hash_entry *h; | |
2390 | bfd_vma addend; | |
2391 | int64_t top_then; | |
2392 | } larch_reloc_queue[LARCH_RECENT_RELOC_QUEUE_LENGTH]; | |
2393 | static size_t larch_reloc_queue_head = 0; | |
2394 | static size_t larch_reloc_queue_tail = 0; | |
2395 | ||
2396 | static const char * | |
2397 | loongarch_sym_name (bfd *input_bfd, struct elf_link_hash_entry *h, | |
2398 | Elf_Internal_Sym *sym) | |
2399 | { | |
2400 | const char *ret = NULL; | |
2401 | if (sym) | |
2402 | ret = bfd_elf_string_from_elf_section (input_bfd, | |
2403 | elf_symtab_hdr (input_bfd).sh_link, | |
2404 | sym->st_name); | |
2405 | else if (h) | |
2406 | ret = h->root.root.string; | |
2407 | ||
2408 | if (ret == NULL || *ret == '\0') | |
2409 | ret = "<nameless>"; | |
2410 | return ret; | |
2411 | } | |
2412 | ||
2413 | static void | |
2414 | loongarch_record_one_reloc (bfd *abfd, asection *section, int r_type, | |
2415 | bfd_vma r_offset, Elf_Internal_Sym *sym, | |
2416 | struct elf_link_hash_entry *h, bfd_vma addend) | |
2417 | { | |
2418 | if ((larch_reloc_queue_head == 0 | |
2419 | && larch_reloc_queue_tail == LARCH_RECENT_RELOC_QUEUE_LENGTH - 1) | |
2420 | || larch_reloc_queue_head == larch_reloc_queue_tail + 1) | |
2421 | larch_reloc_queue_head = | |
2422 | (larch_reloc_queue_head + 1) % LARCH_RECENT_RELOC_QUEUE_LENGTH; | |
2423 | larch_reloc_queue[larch_reloc_queue_tail].bfd = abfd; | |
2424 | larch_reloc_queue[larch_reloc_queue_tail].section = section; | |
2425 | larch_reloc_queue[larch_reloc_queue_tail].r_offset = r_offset; | |
2426 | larch_reloc_queue[larch_reloc_queue_tail].r_type = r_type; | |
2427 | larch_reloc_queue[larch_reloc_queue_tail].sym = sym; | |
2428 | larch_reloc_queue[larch_reloc_queue_tail].h = h; | |
2429 | larch_reloc_queue[larch_reloc_queue_tail].addend = addend; | |
2430 | loongarch_top (&larch_reloc_queue[larch_reloc_queue_tail].top_then); | |
2431 | larch_reloc_queue_tail = | |
2432 | (larch_reloc_queue_tail + 1) % LARCH_RECENT_RELOC_QUEUE_LENGTH; | |
2433 | } | |
2434 | ||
2435 | static void | |
2436 | loongarch_dump_reloc_record (void (*p) (const char *fmt, ...)) | |
2437 | { | |
2438 | size_t i = larch_reloc_queue_head; | |
2439 | bfd *a_bfd = NULL; | |
2440 | asection *section = NULL; | |
2441 | bfd_vma r_offset = 0; | |
2442 | int inited = 0; | |
2443 | p ("Dump relocate record:\n"); | |
2444 | p ("stack top\t\trelocation name\t\tsymbol"); | |
2445 | while (i != larch_reloc_queue_tail) | |
2446 | { | |
2447 | if (a_bfd != larch_reloc_queue[i].bfd | |
2448 | || section != larch_reloc_queue[i].section | |
2449 | || r_offset != larch_reloc_queue[i].r_offset) | |
2450 | { | |
2451 | a_bfd = larch_reloc_queue[i].bfd; | |
2452 | section = larch_reloc_queue[i].section; | |
2453 | r_offset = larch_reloc_queue[i].r_offset; | |
2454 | p ("\nat %pB(%pA+0x%v):\n", larch_reloc_queue[i].bfd, | |
2455 | larch_reloc_queue[i].section, larch_reloc_queue[i].r_offset); | |
2456 | } | |
2457 | ||
2458 | if (!inited) | |
2459 | inited = 1, p ("...\n"); | |
2460 | ||
2461 | reloc_howto_type *howto = | |
2462 | loongarch_elf_rtype_to_howto (larch_reloc_queue[i].bfd, | |
2463 | larch_reloc_queue[i].r_type); | |
2464 | p ("0x%V %s\t`%s'", (bfd_vma) larch_reloc_queue[i].top_then, | |
2465 | howto ? howto->name : "<unknown reloc>", | |
2466 | loongarch_sym_name (larch_reloc_queue[i].bfd, larch_reloc_queue[i].h, | |
2467 | larch_reloc_queue[i].sym)); | |
2468 | ||
2469 | long addend = larch_reloc_queue[i].addend; | |
2470 | if (addend < 0) | |
2471 | p (" - %ld", -addend); | |
2472 | else if (0 < addend) | |
2473 | p (" + %ld(0x%v)", addend, larch_reloc_queue[i].addend); | |
2474 | ||
2475 | p ("\n"); | |
2476 | i = (i + 1) % LARCH_RECENT_RELOC_QUEUE_LENGTH; | |
2477 | } | |
2478 | p ("\n" | |
2479 | "-- Record dump end --\n\n"); | |
2480 | } | |
2481 | ||
e214f8db | 2482 | static bool |
2483 | loongarch_reloc_is_fatal (struct bfd_link_info *info, | |
2484 | bfd *input_bfd, | |
2485 | asection *input_section, | |
2486 | Elf_Internal_Rela *rel, | |
2487 | reloc_howto_type *howto, | |
2488 | bfd_reloc_status_type rtype, | |
2489 | bool is_undefweak, | |
2490 | const char *name, | |
2491 | const char *msg) | |
2492 | { | |
2493 | bool fatal = true; | |
2494 | switch (rtype) | |
2495 | { | |
2496 | /* 'dangerous' means we do it but can't promise it's ok | |
2497 | 'unsupport' means out of ability of relocation type | |
2498 | 'undefined' means we can't deal with the undefined symbol. */ | |
2499 | case bfd_reloc_undefined: | |
2500 | info->callbacks->undefined_symbol (info, name, input_bfd, input_section, | |
2501 | rel->r_offset, true); | |
2502 | info->callbacks->info ("%X%pB(%pA+0x%v): error: %s against %s`%s':\n%s\n", | |
2503 | input_bfd, input_section, rel->r_offset, | |
2504 | howto->name, | |
2505 | is_undefweak ? "[undefweak] " : "", name, msg); | |
2506 | break; | |
2507 | case bfd_reloc_dangerous: | |
2508 | info->callbacks->info ("%pB(%pA+0x%v): warning: %s against %s`%s':\n%s\n", | |
2509 | input_bfd, input_section, rel->r_offset, | |
2510 | howto->name, | |
2511 | is_undefweak ? "[undefweak] " : "", name, msg); | |
2512 | fatal = false; | |
2513 | break; | |
2514 | case bfd_reloc_notsupported: | |
2515 | info->callbacks->info ("%X%pB(%pA+0x%v): error: %s against %s`%s':\n%s\n", | |
2516 | input_bfd, input_section, rel->r_offset, | |
2517 | howto->name, | |
2518 | is_undefweak ? "[undefweak] " : "", name, msg); | |
2519 | break; | |
2520 | default: | |
2521 | break; | |
2522 | } | |
2523 | return fatal; | |
2524 | } | |
2525 | ||
378535f2 | 2526 | /* If lo12 immediate > 0x7ff, because sign-extend caused by addi.d/ld.d, |
2527 | hi20 immediate need to add 0x1. | |
2528 | For example: pc 0x120000000, symbol 0x120000812 | |
2529 | lo12 immediate is 0x812, 0x120000812 & 0xfff = 0x812 | |
2530 | hi20 immediate is 1, because lo12 imm > 0x7ff, symbol need to add 0x1000 | |
2531 | (((0x120000812 + 0x1000) & ~0xfff) - (0x120000000 & ~0xfff)) >> 12 = 0x1 | |
2532 | ||
2533 | At run: | |
2534 | pcalau12i $t0, hi20 (0x1) | |
2535 | $t0 = 0x120000000 + (0x1 << 12) = 0x120001000 | |
2536 | addi.d $t0, $t0, lo12 (0x812) | |
2537 | $t0 = 0x120001000 + 0xfffffffffffff812 (-(0x1000 - 0x812) = -0x7ee) | |
2538 | = 0x120001000 - 0x7ee (0x1000 - 0x7ee = 0x812) | |
2539 | = 0x120000812 | |
2540 | Without hi20 add 0x1000, the result 0x120000000 - 0x7ee = 0x11ffff812 is | |
2541 | error. | |
2542 | 0x1000 + sign-extend-to64(0x8xx) = 0x8xx. */ | |
6d13722a | 2543 | #define RELOCATE_CALC_PC32_HI20(relocation, pc) \ |
2544 | ({ \ | |
1b6fccd2 | 2545 | bfd_vma __lo = (relocation) & ((bfd_vma)0xfff); \ |
378535f2 | 2546 | relocation = (relocation & ~(bfd_vma)0xfff) \ |
2547 | - (pc & ~(bfd_vma)0xfff); \ | |
1b6fccd2 | 2548 | if (__lo > 0x7ff) \ |
6d13722a | 2549 | relocation += 0x1000; \ |
6d13722a | 2550 | }) |
2551 | ||
aae8784c | 2552 | /* Handle problems caused by symbol extensions in TLS LE, The processing |
2553 | is similar to the macro RELOCATE_CALC_PC32_HI20 method. */ | |
2554 | #define RELOCATE_TLS_TP32_HI20(relocation) \ | |
2555 | ({ \ | |
2556 | bfd_vma __lo = (relocation) & ((bfd_vma)0xfff); \ | |
2557 | if (__lo > 0x7ff) \ | |
2558 | relocation += 0x800; \ | |
2559 | relocation = relocation & ~(bfd_vma)0xfff; \ | |
2560 | }) | |
2561 | ||
378535f2 | 2562 | /* For example: pc is 0x11000010000100, symbol is 0x1812348ffff812 |
2563 | offset = (0x1812348ffff812 & ~0xfff) - (0x11000010000100 & ~0xfff) | |
2564 | = 0x712347ffff000 | |
2565 | lo12: 0x1812348ffff812 & 0xfff = 0x812 | |
2566 | hi20: 0x7ffff + 0x1(lo12 > 0x7ff) = 0x80000 | |
2567 | lo20: 0x71234 - 0x1(lo12 > 0x7ff) + 0x1(hi20 > 0x7ffff) | |
2568 | hi12: 0x0 | |
2569 | ||
2570 | pcalau12i $t1, hi20 (0x80000) | |
2571 | $t1 = 0x11000010000100 + sign-extend(0x80000 << 12) | |
2572 | = 0x11000010000100 + 0xffffffff80000000 | |
2573 | = 0x10ffff90000000 | |
2574 | addi.d $t0, $zero, lo12 (0x812) | |
2575 | $t0 = 0xfffffffffffff812 (if lo12 > 0x7ff, because sign-extend, | |
2576 | lo20 need to sub 0x1) | |
85ad846e | 2577 | lu32i.d $t0, lo20 (0x71234) |
378535f2 | 2578 | $t0 = {0x71234, 0xfffff812} |
2579 | = 0x71234fffff812 | |
2580 | lu52i.d $t0, hi12 (0x0) | |
2581 | $t0 = {0x0, 0x71234fffff812} | |
2582 | = 0x71234fffff812 | |
2583 | add.d $t1, $t1, $t0 | |
2584 | $t1 = 0x10ffff90000000 + 0x71234fffff812 | |
2585 | = 0x1812348ffff812. */ | |
6d13722a | 2586 | #define RELOCATE_CALC_PC64_HI32(relocation, pc) \ |
2587 | ({ \ | |
378535f2 | 2588 | bfd_vma __lo = (relocation & (bfd_vma)0xfff); \ |
2589 | relocation = (relocation & ~(bfd_vma)0xfff) \ | |
6590ec80 | 2590 | - ((pc) & ~(bfd_vma)0xfff); \ |
1b6fccd2 | 2591 | if (__lo > 0x7ff) \ |
378535f2 | 2592 | relocation += (0x1000 - 0x100000000); \ |
2593 | if (relocation & 0x80000000) \ | |
2594 | relocation += 0x100000000; \ | |
6d13722a | 2595 | }) |
e214f8db | 2596 | |
3898e04b | 2597 | |
b67a17aa LC |
2598 | /* Compute the tp/dtp offset of a tls symbol. |
2599 | It is dtp offset in dynamic tls model (gd/ld) and tp | |
2600 | offset in static tls model (ie/le). Both offsets are | |
2601 | calculated the same way on LoongArch, so the same | |
2602 | function is used. */ | |
d5de762b | 2603 | static bfd_vma |
b67a17aa | 2604 | tlsoff (struct bfd_link_info *info, bfd_vma addr) |
d5de762b LC |
2605 | { |
2606 | /* If tls_sec is NULL, we should have signalled an error already. */ | |
2607 | if (elf_hash_table (info)->tls_sec == NULL) | |
2608 | return 0; | |
b67a17aa | 2609 | return addr - elf_hash_table (info)->tls_sec->vma; |
d5de762b LC |
2610 | } |
2611 | ||
2612 | ||
e214f8db | 2613 | static int |
2614 | loongarch_elf_relocate_section (bfd *output_bfd, struct bfd_link_info *info, | |
2615 | bfd *input_bfd, asection *input_section, | |
2616 | bfd_byte *contents, Elf_Internal_Rela *relocs, | |
2617 | Elf_Internal_Sym *local_syms, | |
2618 | asection **local_sections) | |
2619 | { | |
2620 | Elf_Internal_Rela *rel; | |
2621 | Elf_Internal_Rela *relend; | |
2622 | bool fatal = false; | |
2623 | asection *sreloc = elf_section_data (input_section)->sreloc; | |
2624 | struct loongarch_elf_link_hash_table *htab = loongarch_elf_hash_table (info); | |
2625 | Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_bfd); | |
2626 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); | |
2627 | bfd_vma *local_got_offsets = elf_local_got_offsets (input_bfd); | |
2628 | bool is_pic = bfd_link_pic (info); | |
2629 | bool is_dyn = elf_hash_table (info)->dynamic_sections_created; | |
2630 | asection *plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; | |
2631 | asection *got = htab->elf.sgot; | |
2632 | ||
2633 | relend = relocs + input_section->reloc_count; | |
2634 | for (rel = relocs; rel < relend; rel++) | |
2635 | { | |
3898e04b | 2636 | unsigned int r_type = ELFNN_R_TYPE (rel->r_info); |
e214f8db | 2637 | unsigned long r_symndx = ELFNN_R_SYM (rel->r_info); |
2638 | bfd_vma pc = sec_addr (input_section) + rel->r_offset; | |
2639 | reloc_howto_type *howto = NULL; | |
2640 | asection *sec = NULL; | |
2641 | Elf_Internal_Sym *sym = NULL; | |
2642 | struct elf_link_hash_entry *h = NULL; | |
2643 | const char *name; | |
2644 | bfd_reloc_status_type r = bfd_reloc_ok; | |
4f248d61 | 2645 | bool is_ie, is_desc, is_undefweak, unresolved_reloc, defined_local; |
e214f8db | 2646 | bool resolved_local, resolved_dynly, resolved_to_const; |
2647 | char tls_type; | |
4f248d61 | 2648 | bfd_vma relocation, off, ie_off, desc_off; |
e214f8db | 2649 | int i, j; |
2650 | ||
5966e2eb LC |
2651 | /* When an unrecognized relocation is encountered, which usually |
2652 | occurs when using a newer assembler but an older linker, an error | |
2653 | should be reported instead of continuing to the next relocation. */ | |
e214f8db | 2654 | howto = loongarch_elf_rtype_to_howto (input_bfd, r_type); |
5966e2eb LC |
2655 | if (howto == NULL) |
2656 | return _bfd_unrecognized_reloc (input_bfd, input_section, r_type); | |
2657 | ||
2658 | if (r_type == R_LARCH_GNU_VTINHERIT || r_type == R_LARCH_GNU_VTENTRY) | |
e214f8db | 2659 | continue; |
2660 | ||
2661 | /* This is a final link. */ | |
2662 | if (r_symndx < symtab_hdr->sh_info) | |
2663 | { | |
2664 | is_undefweak = false; | |
2665 | unresolved_reloc = false; | |
2666 | sym = local_syms + r_symndx; | |
2667 | sec = local_sections[r_symndx]; | |
2668 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); | |
2669 | ||
2670 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
2671 | if (!bfd_link_relocatable (info) | |
2672 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) | |
2673 | { | |
2674 | h = elfNN_loongarch_get_local_sym_hash (htab, input_bfd, rel, | |
2675 | false); | |
2676 | if (h == NULL) | |
2677 | abort (); | |
2678 | ||
2679 | /* Set STT_GNU_IFUNC symbol value. */ | |
2680 | h->root.u.def.value = sym->st_value; | |
2681 | h->root.u.def.section = sec; | |
2682 | } | |
2683 | defined_local = true; | |
2684 | resolved_local = true; | |
2685 | resolved_dynly = false; | |
2686 | resolved_to_const = false; | |
6d13722a | 2687 | |
2688 | /* Calc in funtion elf_link_input_bfd, | |
2689 | * if #define elf_backend_rela_normal to 1. */ | |
e214f8db | 2690 | if (bfd_link_relocatable (info) |
2691 | && ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
6d13722a | 2692 | continue; |
e214f8db | 2693 | } |
2694 | else | |
2695 | { | |
2696 | bool warned, ignored; | |
2697 | ||
2698 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, | |
2699 | r_symndx, symtab_hdr, sym_hashes, | |
2700 | h, sec, relocation, | |
2701 | unresolved_reloc, warned, ignored); | |
2702 | /* Here means symbol isn't local symbol only and 'h != NULL'. */ | |
2703 | ||
2704 | /* The 'unresolved_syms_in_objects' specify how to deal with undefined | |
2705 | symbol. And 'dynamic_undefined_weak' specify what to do when | |
2706 | meeting undefweak. */ | |
2707 | ||
2708 | if ((is_undefweak = h->root.type == bfd_link_hash_undefweak)) | |
2709 | { | |
2710 | defined_local = false; | |
2711 | resolved_local = false; | |
2712 | resolved_to_const = (!is_dyn || h->dynindx == -1 | |
2713 | || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)); | |
2714 | resolved_dynly = !resolved_local && !resolved_to_const; | |
2715 | } | |
2716 | else if (warned) | |
2717 | { | |
2718 | /* Symbol undefined offen means failed already. I don't know why | |
2719 | 'warned' here but I guess it want to continue relocating as if | |
2720 | no error occures to find other errors as more as possible. */ | |
2721 | ||
2722 | /* To avoid generating warning messages about truncated | |
2723 | relocations, set the relocation's address to be the same as | |
2724 | the start of this section. */ | |
2725 | relocation = (input_section->output_section | |
2726 | ? input_section->output_section->vma | |
2727 | : 0); | |
2728 | ||
2729 | defined_local = relocation != 0; | |
2730 | resolved_local = defined_local; | |
2731 | resolved_to_const = !resolved_local; | |
2732 | resolved_dynly = false; | |
2733 | } | |
2734 | else | |
2735 | { | |
2736 | defined_local = !unresolved_reloc && !ignored; | |
2737 | resolved_local = | |
2738 | defined_local && SYMBOL_REFERENCES_LOCAL (info, h); | |
2739 | resolved_dynly = !resolved_local; | |
2740 | resolved_to_const = !resolved_local && !resolved_dynly; | |
2741 | } | |
2742 | } | |
2743 | ||
2744 | name = loongarch_sym_name (input_bfd, h, sym); | |
2745 | ||
2746 | if (sec != NULL && discarded_section (sec)) | |
2747 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, rel, | |
2748 | 1, relend, howto, 0, contents); | |
2749 | ||
2750 | if (bfd_link_relocatable (info)) | |
2751 | continue; | |
2752 | ||
2753 | /* The r_symndx will be STN_UNDEF (zero) only for relocs against symbols | |
2754 | from removed linkonce sections, or sections discarded by a linker | |
2755 | script. Also for R_*_SOP_PUSH_ABSOLUTE and PCREL to specify const. */ | |
2756 | if (r_symndx == STN_UNDEF || bfd_is_abs_section (sec)) | |
2757 | { | |
2758 | defined_local = false; | |
2759 | resolved_local = false; | |
2760 | resolved_dynly = false; | |
2761 | resolved_to_const = true; | |
2762 | } | |
2763 | ||
6d13722a | 2764 | /* The ifunc reference generate plt. */ |
d218dba3 | 2765 | if (h && h->type == STT_GNU_IFUNC && h->plt.offset != MINUS_ONE) |
e214f8db | 2766 | { |
e214f8db | 2767 | defined_local = true; |
2768 | resolved_local = true; | |
2769 | resolved_dynly = false; | |
2770 | resolved_to_const = false; | |
2771 | relocation = sec_addr (plt) + h->plt.offset; | |
2772 | } | |
2773 | ||
2774 | unresolved_reloc = resolved_dynly; | |
2775 | ||
2776 | BFD_ASSERT (resolved_local + resolved_dynly + resolved_to_const == 1); | |
2777 | ||
d218dba3 | 2778 | /* BFD_ASSERT (!resolved_dynly || (h && h->dynindx != -1));. */ |
e214f8db | 2779 | |
2780 | BFD_ASSERT (!resolved_local || defined_local); | |
2781 | ||
4f248d61 | 2782 | is_desc = false; |
e214f8db | 2783 | is_ie = false; |
2784 | switch (r_type) | |
2785 | { | |
2786 | case R_LARCH_MARK_PCREL: | |
2787 | case R_LARCH_MARK_LA: | |
2788 | case R_LARCH_NONE: | |
2789 | r = bfd_reloc_continue; | |
2790 | unresolved_reloc = false; | |
2791 | break; | |
2792 | ||
2793 | case R_LARCH_32: | |
2794 | case R_LARCH_64: | |
2795 | if (resolved_dynly || (is_pic && resolved_local)) | |
2796 | { | |
2797 | Elf_Internal_Rela outrel; | |
2798 | ||
2799 | /* When generating a shared object, these relocations are copied | |
2800 | into the output file to be resolved at run time. */ | |
2801 | ||
2802 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, info, | |
2803 | input_section, | |
2804 | rel->r_offset); | |
2805 | ||
2806 | unresolved_reloc = (!((bfd_vma) -2 <= outrel.r_offset) | |
2807 | && (input_section->flags & SEC_ALLOC)); | |
2808 | ||
2809 | outrel.r_offset += sec_addr (input_section); | |
d218dba3 | 2810 | |
bc2a35c0 | 2811 | /* A pointer point to a ifunc symbol. */ |
2812 | if (h && h->type == STT_GNU_IFUNC) | |
d218dba3 | 2813 | { |
bc2a35c0 | 2814 | if (h->dynindx == -1) |
2815 | { | |
2816 | outrel.r_info = ELFNN_R_INFO (0, R_LARCH_IRELATIVE); | |
2817 | outrel.r_addend = (h->root.u.def.value | |
2818 | + h->root.u.def.section->output_section->vma | |
2819 | + h->root.u.def.section->output_offset); | |
2820 | } | |
2821 | else | |
2822 | { | |
2823 | outrel.r_info = ELFNN_R_INFO (h->dynindx, R_LARCH_NN); | |
2824 | outrel.r_addend = 0; | |
2825 | } | |
d218dba3 | 2826 | |
bc2a35c0 | 2827 | if (SYMBOL_REFERENCES_LOCAL (info, h)) |
2828 | { | |
2829 | ||
2830 | if (htab->elf.splt != NULL) | |
2831 | sreloc = htab->elf.srelgot; | |
2832 | else | |
2833 | sreloc = htab->elf.irelplt; | |
2834 | } | |
d218dba3 | 2835 | else |
bc2a35c0 | 2836 | { |
2837 | ||
2838 | if (bfd_link_pic (info)) | |
2839 | sreloc = htab->elf.irelifunc; | |
2840 | else if (htab->elf.splt != NULL) | |
2841 | sreloc = htab->elf.srelgot; | |
2842 | else | |
2843 | sreloc = htab->elf.irelplt; | |
2844 | } | |
d218dba3 | 2845 | } |
2846 | else if (resolved_dynly) | |
e214f8db | 2847 | { |
6d13722a | 2848 | if (h->dynindx == -1) |
268391ac | 2849 | outrel.r_info = ELFNN_R_INFO (0, r_type); |
6d13722a | 2850 | else |
2851 | outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type); | |
2852 | ||
e214f8db | 2853 | outrel.r_addend = rel->r_addend; |
2854 | } | |
2855 | else | |
2856 | { | |
2857 | outrel.r_info = ELFNN_R_INFO (0, R_LARCH_RELATIVE); | |
2858 | outrel.r_addend = relocation + rel->r_addend; | |
2859 | } | |
2860 | ||
6d13722a | 2861 | /* No alloc space of func allocate_dynrelocs. */ |
2862 | if (unresolved_reloc | |
2863 | && !(h && (h->is_weakalias || !h->dyn_relocs))) | |
e214f8db | 2864 | loongarch_elf_append_rela (output_bfd, sreloc, &outrel); |
2865 | } | |
2866 | ||
2867 | relocation += rel->r_addend; | |
2868 | break; | |
2869 | ||
1b6fccd2 | 2870 | case R_LARCH_ADD6: |
e214f8db | 2871 | case R_LARCH_ADD8: |
2872 | case R_LARCH_ADD16: | |
2873 | case R_LARCH_ADD24: | |
2874 | case R_LARCH_ADD32: | |
2875 | case R_LARCH_ADD64: | |
1b6fccd2 | 2876 | { |
2877 | bfd_vma old_value = bfd_get (howto->bitsize, input_bfd, | |
2878 | contents + rel->r_offset); | |
2879 | relocation = old_value + relocation + rel->r_addend; | |
2880 | break; | |
2881 | } | |
2882 | ||
2883 | case R_LARCH_SUB6: | |
e214f8db | 2884 | case R_LARCH_SUB8: |
2885 | case R_LARCH_SUB16: | |
2886 | case R_LARCH_SUB24: | |
2887 | case R_LARCH_SUB32: | |
2888 | case R_LARCH_SUB64: | |
1b6fccd2 | 2889 | { |
2890 | bfd_vma old_value = bfd_get (howto->bitsize, input_bfd, | |
2891 | contents + rel->r_offset); | |
2892 | relocation = old_value - relocation - rel->r_addend; | |
2893 | break; | |
2894 | } | |
2895 | ||
2896 | case R_LARCH_ADD_ULEB128: | |
2897 | case R_LARCH_SUB_ULEB128: | |
2898 | { | |
2899 | /* Get the value and length of the uleb128 data. */ | |
2900 | unsigned int len = 0; | |
2901 | bfd_vma old_value = _bfd_read_unsigned_leb128 (input_bfd, | |
2902 | contents + rel->r_offset, &len); | |
2903 | ||
2904 | if (R_LARCH_ADD_ULEB128 == ELFNN_R_TYPE (rel->r_info)) | |
2905 | relocation = old_value + relocation + rel->r_addend; | |
2906 | else if (R_LARCH_SUB_ULEB128 == ELFNN_R_TYPE (rel->r_info)) | |
2907 | relocation = old_value - relocation - rel->r_addend; | |
2908 | ||
2909 | bfd_vma mask = (1 << (7 * len)) - 1; | |
2910 | relocation &= mask; | |
2911 | break; | |
2912 | } | |
e214f8db | 2913 | |
2914 | case R_LARCH_TLS_DTPREL32: | |
2915 | case R_LARCH_TLS_DTPREL64: | |
2916 | if (resolved_dynly) | |
2917 | { | |
2918 | Elf_Internal_Rela outrel; | |
2919 | ||
2920 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, info, | |
2921 | input_section, | |
2922 | rel->r_offset); | |
2923 | unresolved_reloc = (!((bfd_vma) -2 <= outrel.r_offset) | |
2924 | && (input_section->flags & SEC_ALLOC)); | |
2925 | outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type); | |
2926 | outrel.r_offset += sec_addr (input_section); | |
2927 | outrel.r_addend = rel->r_addend; | |
2928 | if (unresolved_reloc) | |
2929 | loongarch_elf_append_rela (output_bfd, sreloc, &outrel); | |
2930 | break; | |
2931 | } | |
2932 | ||
2933 | if (resolved_to_const) | |
2934 | fatal = loongarch_reloc_is_fatal (info, input_bfd, input_section, | |
2935 | rel, howto, | |
2936 | bfd_reloc_notsupported, | |
2937 | is_undefweak, name, | |
2938 | "Internal:"); | |
d218dba3 | 2939 | if (resolved_local) |
2940 | { | |
2941 | if (!elf_hash_table (info)->tls_sec) | |
2942 | { | |
2943 | fatal = loongarch_reloc_is_fatal (info, input_bfd, | |
2944 | input_section, rel, howto, bfd_reloc_notsupported, | |
2945 | is_undefweak, name, "TLS section not be created"); | |
2946 | } | |
2947 | else | |
b67a17aa | 2948 | relocation = tlsoff (info, relocation); |
d218dba3 | 2949 | } |
2950 | else | |
2951 | { | |
2952 | fatal = loongarch_reloc_is_fatal (info, input_bfd, | |
2953 | input_section, rel, howto, bfd_reloc_undefined, | |
2954 | is_undefweak, name, | |
2955 | "TLS LE just can be resolved local only."); | |
2956 | } | |
2957 | ||
e214f8db | 2958 | break; |
2959 | ||
2960 | case R_LARCH_SOP_PUSH_TLS_TPREL: | |
2961 | if (resolved_local) | |
2962 | { | |
2963 | if (!elf_hash_table (info)->tls_sec) | |
2964 | fatal = (loongarch_reloc_is_fatal | |
2965 | (info, input_bfd, input_section, rel, howto, | |
2966 | bfd_reloc_notsupported, is_undefweak, name, | |
2967 | "TLS section not be created")); | |
2968 | else | |
2969 | relocation -= elf_hash_table (info)->tls_sec->vma; | |
2970 | } | |
2971 | else | |
2972 | fatal = (loongarch_reloc_is_fatal | |
2973 | (info, input_bfd, input_section, rel, howto, | |
2974 | bfd_reloc_undefined, is_undefweak, name, | |
2975 | "TLS LE just can be resolved local only.")); | |
2976 | break; | |
2977 | ||
2978 | case R_LARCH_SOP_PUSH_ABSOLUTE: | |
2979 | if (is_undefweak) | |
2980 | { | |
2981 | if (resolved_dynly) | |
2982 | fatal = (loongarch_reloc_is_fatal | |
2983 | (info, input_bfd, input_section, rel, howto, | |
2984 | bfd_reloc_dangerous, is_undefweak, name, | |
2985 | "Someone require us to resolve undefweak " | |
2986 | "symbol dynamically. \n" | |
2987 | "But this reloc can't be done. " | |
2988 | "I think I can't throw error " | |
2989 | "for this\n" | |
2990 | "so I resolved it to 0. " | |
2991 | "I suggest to re-compile with '-fpic'.")); | |
2992 | ||
2993 | relocation = 0; | |
2994 | unresolved_reloc = false; | |
2995 | break; | |
2996 | } | |
2997 | ||
2998 | if (resolved_to_const) | |
2999 | { | |
3000 | relocation += rel->r_addend; | |
3001 | break; | |
3002 | } | |
3003 | ||
3004 | if (is_pic) | |
3005 | { | |
3006 | fatal = (loongarch_reloc_is_fatal | |
3007 | (info, input_bfd, input_section, rel, howto, | |
3008 | bfd_reloc_notsupported, is_undefweak, name, | |
3009 | "Under PIC we don't know load address. Re-compile " | |
3010 | "with '-fpic'?")); | |
3011 | break; | |
3012 | } | |
3013 | ||
3014 | if (resolved_dynly) | |
3015 | { | |
3016 | if (!(plt && h && h->plt.offset != MINUS_ONE)) | |
3017 | { | |
3018 | fatal = (loongarch_reloc_is_fatal | |
3019 | (info, input_bfd, input_section, rel, howto, | |
3020 | bfd_reloc_undefined, is_undefweak, name, | |
3021 | "Can't be resolved dynamically. Try to re-compile " | |
3022 | "with '-fpic'?")); | |
3023 | break; | |
3024 | } | |
3025 | ||
3026 | if (rel->r_addend != 0) | |
3027 | { | |
3028 | fatal = (loongarch_reloc_is_fatal | |
3029 | (info, input_bfd, input_section, rel, howto, | |
3030 | bfd_reloc_notsupported, is_undefweak, name, | |
3031 | "Shouldn't be with r_addend.")); | |
3032 | break; | |
3033 | } | |
3034 | ||
3035 | relocation = sec_addr (plt) + h->plt.offset; | |
3036 | unresolved_reloc = false; | |
3037 | break; | |
3038 | } | |
3039 | ||
3040 | if (resolved_local) | |
3041 | { | |
3042 | relocation += rel->r_addend; | |
3043 | break; | |
3044 | } | |
3045 | ||
3046 | break; | |
3047 | ||
3048 | case R_LARCH_SOP_PUSH_PCREL: | |
3049 | case R_LARCH_SOP_PUSH_PLT_PCREL: | |
3050 | unresolved_reloc = false; | |
3051 | ||
6d13722a | 3052 | if (is_undefweak) |
e214f8db | 3053 | { |
3054 | i = 0, j = 0; | |
3055 | relocation = 0; | |
3056 | if (resolved_dynly) | |
3057 | { | |
3058 | if (h && h->plt.offset != MINUS_ONE) | |
3059 | i = 1, j = 2; | |
3060 | else | |
3061 | fatal = (loongarch_reloc_is_fatal | |
3062 | (info, input_bfd, input_section, rel, howto, | |
3063 | bfd_reloc_dangerous, is_undefweak, name, | |
3064 | "Undefweak need to be resolved dynamically, " | |
3065 | "but PLT stub doesn't represent.")); | |
3066 | } | |
3067 | } | |
3068 | else | |
3069 | { | |
3070 | if (!(defined_local || (h && h->plt.offset != MINUS_ONE))) | |
3071 | { | |
3072 | fatal = (loongarch_reloc_is_fatal | |
3073 | (info, input_bfd, input_section, rel, howto, | |
3074 | bfd_reloc_undefined, is_undefweak, name, | |
3075 | "PLT stub does not represent and " | |
3076 | "symbol not defined.")); | |
3077 | break; | |
3078 | } | |
3079 | ||
3080 | if (resolved_local) | |
3081 | i = 0, j = 2; | |
3082 | else /* if (resolved_dynly) */ | |
3083 | { | |
3084 | if (!(h && h->plt.offset != MINUS_ONE)) | |
3085 | fatal = (loongarch_reloc_is_fatal | |
3086 | (info, input_bfd, input_section, rel, howto, | |
3087 | bfd_reloc_dangerous, is_undefweak, name, | |
3088 | "Internal: PLT stub doesn't represent. " | |
3089 | "Resolve it with pcrel")); | |
3090 | i = 1, j = 3; | |
3091 | } | |
3092 | } | |
3093 | ||
3094 | for (; i < j; i++) | |
3095 | { | |
3096 | if ((i & 1) == 0 && defined_local) | |
3097 | { | |
3098 | relocation -= pc; | |
3099 | relocation += rel->r_addend; | |
3100 | break; | |
3101 | } | |
3102 | ||
3103 | if ((i & 1) && h && h->plt.offset != MINUS_ONE) | |
3104 | { | |
3105 | if (rel->r_addend != 0) | |
3106 | { | |
3107 | fatal = (loongarch_reloc_is_fatal | |
3108 | (info, input_bfd, input_section, rel, howto, | |
3109 | bfd_reloc_notsupported, is_undefweak, name, | |
3110 | "PLT shouldn't be with r_addend.")); | |
3111 | break; | |
3112 | } | |
3113 | relocation = sec_addr (plt) + h->plt.offset - pc; | |
3114 | break; | |
3115 | } | |
3116 | } | |
3117 | break; | |
3118 | ||
3119 | case R_LARCH_SOP_PUSH_GPREL: | |
3120 | unresolved_reloc = false; | |
3121 | ||
3122 | if (rel->r_addend != 0) | |
3123 | { | |
3124 | fatal = (loongarch_reloc_is_fatal | |
3125 | (info, input_bfd, input_section, rel, howto, | |
3126 | bfd_reloc_notsupported, is_undefweak, name, | |
3127 | "Shouldn't be with r_addend.")); | |
3128 | break; | |
3129 | } | |
3130 | ||
3131 | if (h != NULL) | |
3132 | { | |
6d13722a | 3133 | off = h->got.offset & (~1); |
e214f8db | 3134 | |
6d13722a | 3135 | if (h->got.offset == MINUS_ONE && h->type != STT_GNU_IFUNC) |
e214f8db | 3136 | { |
3137 | fatal = (loongarch_reloc_is_fatal | |
3138 | (info, input_bfd, input_section, rel, howto, | |
3139 | bfd_reloc_notsupported, is_undefweak, name, | |
3140 | "Internal: GOT entry doesn't represent.")); | |
3141 | break; | |
3142 | } | |
3143 | ||
d218dba3 | 3144 | /* Hidden symbol not has .got entry, only .got.plt entry |
3145 | so gprel is (plt - got). */ | |
6d13722a | 3146 | if (h->got.offset == MINUS_ONE && h->type == STT_GNU_IFUNC) |
d218dba3 | 3147 | { |
3148 | if (h->plt.offset == (bfd_vma) -1) | |
3149 | { | |
3150 | abort(); | |
3151 | } | |
3152 | ||
3153 | bfd_vma plt_index = h->plt.offset / PLT_ENTRY_SIZE; | |
3154 | off = plt_index * GOT_ENTRY_SIZE; | |
3155 | ||
3156 | if (htab->elf.splt != NULL) | |
3157 | { | |
3158 | /* Section .plt header is 2 times of plt entry. */ | |
6d13722a | 3159 | off = sec_addr (htab->elf.sgotplt) + off |
3160 | - sec_addr (htab->elf.sgot); | |
d218dba3 | 3161 | } |
3162 | else | |
3163 | { | |
3164 | /* Section iplt not has plt header. */ | |
6d13722a | 3165 | off = sec_addr (htab->elf.igotplt) + off |
3166 | - sec_addr (htab->elf.sgot); | |
d218dba3 | 3167 | } |
3168 | } | |
3169 | ||
6d13722a | 3170 | if ((h->got.offset & 1) == 0) |
e214f8db | 3171 | { |
6d13722a | 3172 | if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (is_dyn, |
3173 | bfd_link_pic (info), h) | |
3174 | && ((bfd_link_pic (info) | |
3175 | && SYMBOL_REFERENCES_LOCAL (info, h)))) | |
e214f8db | 3176 | { |
6d13722a | 3177 | /* This is actually a static link, or it is a |
3178 | -Bsymbolic link and the symbol is defined | |
3179 | locally, or the symbol was forced to be local | |
3180 | because of a version file. We must initialize | |
3181 | this entry in the global offset table. Since the | |
3182 | offset must always be a multiple of the word size, | |
3183 | we use the least significant bit to record whether | |
3184 | we have initialized it already. | |
3185 | ||
3186 | When doing a dynamic link, we create a rela.got | |
3187 | relocation entry to initialize the value. This | |
3188 | is done in the finish_dynamic_symbol routine. */ | |
3189 | ||
3190 | if (resolved_dynly) | |
3191 | { | |
3192 | fatal = (loongarch_reloc_is_fatal | |
3193 | (info, input_bfd, input_section, rel, howto, | |
3194 | bfd_reloc_dangerous, is_undefweak, name, | |
3195 | "Internal: here shouldn't dynamic.")); | |
3196 | } | |
e214f8db | 3197 | |
6d13722a | 3198 | if (!(defined_local || resolved_to_const)) |
3199 | { | |
3200 | fatal = (loongarch_reloc_is_fatal | |
3201 | (info, input_bfd, input_section, rel, howto, | |
3202 | bfd_reloc_undefined, is_undefweak, name, | |
3203 | "Internal: ")); | |
3204 | break; | |
3205 | } | |
e214f8db | 3206 | |
6d13722a | 3207 | asection *s; |
3208 | Elf_Internal_Rela outrel; | |
3209 | /* We need to generate a R_LARCH_RELATIVE reloc | |
3210 | for the dynamic linker. */ | |
3211 | s = htab->elf.srelgot; | |
3212 | if (!s) | |
d218dba3 | 3213 | { |
6d13722a | 3214 | fatal = loongarch_reloc_is_fatal |
3215 | (info, input_bfd, | |
3216 | input_section, rel, howto, | |
3217 | bfd_reloc_notsupported, is_undefweak, name, | |
3218 | "Internal: '.rel.got' not represent"); | |
3219 | break; | |
d218dba3 | 3220 | } |
6d13722a | 3221 | |
3222 | outrel.r_offset = sec_addr (got) + off; | |
3223 | outrel.r_info = ELFNN_R_INFO (0, R_LARCH_RELATIVE); | |
3224 | outrel.r_addend = relocation; /* Link-time addr. */ | |
3225 | loongarch_elf_append_rela (output_bfd, s, &outrel); | |
e214f8db | 3226 | } |
6d13722a | 3227 | bfd_put_NN (output_bfd, relocation, got->contents + off); |
3228 | h->got.offset |= 1; | |
e214f8db | 3229 | } |
3230 | } | |
3231 | else | |
3232 | { | |
3233 | if (!local_got_offsets) | |
3234 | { | |
3235 | fatal = (loongarch_reloc_is_fatal | |
3236 | (info, input_bfd, input_section, rel, howto, | |
3237 | bfd_reloc_notsupported, is_undefweak, name, | |
3238 | "Internal: local got offsets not reporesent.")); | |
3239 | break; | |
3240 | } | |
3241 | ||
6d13722a | 3242 | off = local_got_offsets[r_symndx] & (~1); |
e214f8db | 3243 | |
6d13722a | 3244 | if (local_got_offsets[r_symndx] == MINUS_ONE) |
e214f8db | 3245 | { |
3246 | fatal = (loongarch_reloc_is_fatal | |
3247 | (info, input_bfd, input_section, rel, howto, | |
3248 | bfd_reloc_notsupported, is_undefweak, name, | |
3249 | "Internal: GOT entry doesn't represent.")); | |
3250 | break; | |
3251 | } | |
3252 | ||
3253 | /* The offset must always be a multiple of the word size. | |
3254 | So, we can use the least significant bit to record | |
3255 | whether we have already processed this entry. */ | |
8b4d46df | 3256 | if ((local_got_offsets[r_symndx] & 1) == 0) |
e214f8db | 3257 | { |
3258 | if (is_pic) | |
3259 | { | |
3260 | asection *s; | |
3261 | Elf_Internal_Rela outrel; | |
3262 | /* We need to generate a R_LARCH_RELATIVE reloc | |
3263 | for the dynamic linker. */ | |
3264 | s = htab->elf.srelgot; | |
3265 | if (!s) | |
3266 | { | |
3267 | fatal = (loongarch_reloc_is_fatal | |
3268 | (info, input_bfd, input_section, rel, howto, | |
3269 | bfd_reloc_notsupported, is_undefweak, name, | |
3270 | "Internal: '.rel.got' not represent")); | |
3271 | break; | |
3272 | } | |
3273 | ||
3274 | outrel.r_offset = sec_addr (got) + off; | |
3275 | outrel.r_info = ELFNN_R_INFO (0, R_LARCH_RELATIVE); | |
3276 | outrel.r_addend = relocation; /* Link-time addr. */ | |
3277 | loongarch_elf_append_rela (output_bfd, s, &outrel); | |
3278 | } | |
3279 | ||
3280 | bfd_put_NN (output_bfd, relocation, got->contents + off); | |
3281 | local_got_offsets[r_symndx] |= 1; | |
3282 | } | |
3283 | } | |
3284 | relocation = off; | |
6d13722a | 3285 | |
e214f8db | 3286 | break; |
3287 | ||
3288 | case R_LARCH_SOP_PUSH_TLS_GOT: | |
3289 | case R_LARCH_SOP_PUSH_TLS_GD: | |
6d13722a | 3290 | { |
3291 | unresolved_reloc = false; | |
3292 | if (r_type == R_LARCH_SOP_PUSH_TLS_GOT) | |
3293 | is_ie = true; | |
3294 | ||
3295 | bfd_vma got_off = 0; | |
3296 | if (h != NULL) | |
3297 | { | |
3298 | got_off = h->got.offset; | |
3299 | h->got.offset |= 1; | |
3300 | } | |
3301 | else | |
3302 | { | |
3303 | got_off = local_got_offsets[r_symndx]; | |
3304 | local_got_offsets[r_symndx] |= 1; | |
3305 | } | |
3306 | ||
3307 | BFD_ASSERT (got_off != MINUS_ONE); | |
3308 | ||
3309 | ie_off = 0; | |
3310 | tls_type = _bfd_loongarch_elf_tls_type (input_bfd, h, r_symndx); | |
3311 | if ((tls_type & GOT_TLS_GD) && (tls_type & GOT_TLS_IE)) | |
3312 | ie_off = 2 * GOT_ENTRY_SIZE; | |
3313 | ||
3314 | if ((got_off & 1) == 0) | |
3315 | { | |
3316 | Elf_Internal_Rela rela; | |
3317 | asection *srel = htab->elf.srelgot; | |
3318 | bfd_vma tls_block_off = 0; | |
3319 | ||
3320 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
3321 | { | |
3322 | BFD_ASSERT (elf_hash_table (info)->tls_sec); | |
3323 | tls_block_off = relocation | |
3324 | - elf_hash_table (info)->tls_sec->vma; | |
3325 | } | |
3326 | ||
3327 | if (tls_type & GOT_TLS_GD) | |
3328 | { | |
3329 | rela.r_offset = sec_addr (got) + got_off; | |
3330 | rela.r_addend = 0; | |
3331 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
3332 | { | |
3333 | /* Local sym, used in exec, set module id 1. */ | |
3334 | if (bfd_link_executable (info)) | |
3335 | bfd_put_NN (output_bfd, 1, got->contents + got_off); | |
3336 | else | |
3337 | { | |
3338 | rela.r_info = ELFNN_R_INFO (0, | |
3339 | R_LARCH_TLS_DTPMODNN); | |
3340 | loongarch_elf_append_rela (output_bfd, srel, &rela); | |
3341 | } | |
3342 | ||
3343 | bfd_put_NN (output_bfd, tls_block_off, | |
3344 | got->contents + got_off + GOT_ENTRY_SIZE); | |
3345 | } | |
3346 | /* Dynamic resolved. */ | |
3347 | else | |
3348 | { | |
3349 | /* Dynamic relocate module id. */ | |
3350 | rela.r_info = ELFNN_R_INFO (h->dynindx, | |
3351 | R_LARCH_TLS_DTPMODNN); | |
3352 | loongarch_elf_append_rela (output_bfd, srel, &rela); | |
3353 | ||
3354 | /* Dynamic relocate offset of block. */ | |
3355 | rela.r_offset += GOT_ENTRY_SIZE; | |
3356 | rela.r_info = ELFNN_R_INFO (h->dynindx, | |
3357 | R_LARCH_TLS_DTPRELNN); | |
3358 | loongarch_elf_append_rela (output_bfd, srel, &rela); | |
3359 | } | |
3360 | } | |
3361 | if (tls_type & GOT_TLS_IE) | |
3362 | { | |
3363 | rela.r_offset = sec_addr (got) + got_off + ie_off; | |
3364 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
3365 | { | |
3366 | /* Local sym, used in exec, set module id 1. */ | |
3367 | if (!bfd_link_executable (info)) | |
3368 | { | |
3369 | rela.r_info = ELFNN_R_INFO (0, R_LARCH_TLS_TPRELNN); | |
3370 | rela.r_addend = tls_block_off; | |
3371 | loongarch_elf_append_rela (output_bfd, srel, &rela); | |
3372 | } | |
3373 | ||
3374 | bfd_put_NN (output_bfd, tls_block_off, | |
3375 | got->contents + got_off + ie_off); | |
3376 | } | |
3377 | /* Dynamic resolved. */ | |
3378 | else | |
3379 | { | |
3380 | /* Dynamic relocate offset of block. */ | |
3381 | rela.r_info = ELFNN_R_INFO (h->dynindx, | |
3382 | R_LARCH_TLS_TPRELNN); | |
3383 | rela.r_addend = 0; | |
3384 | loongarch_elf_append_rela (output_bfd, srel, &rela); | |
3385 | } | |
3386 | } | |
3387 | } | |
3388 | ||
3389 | relocation = (got_off & (~(bfd_vma)1)) + (is_ie ? ie_off : 0); | |
3390 | } | |
3391 | break; | |
3392 | ||
3393 | /* New reloc types. */ | |
dc5f359e | 3394 | case R_LARCH_B16: |
6d13722a | 3395 | case R_LARCH_B21: |
3396 | case R_LARCH_B26: | |
dc5f359e | 3397 | case R_LARCH_CALL36: |
e214f8db | 3398 | unresolved_reloc = false; |
6d13722a | 3399 | if (is_undefweak) |
3400 | { | |
3401 | relocation = 0; | |
3402 | } | |
e214f8db | 3403 | |
6d13722a | 3404 | if (resolved_local) |
e214f8db | 3405 | { |
6d13722a | 3406 | relocation -= pc; |
3407 | relocation += rel->r_addend; | |
3408 | } | |
3409 | else if (resolved_dynly) | |
3410 | { | |
3411 | BFD_ASSERT (h | |
3412 | && (h->plt.offset != MINUS_ONE | |
3413 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
3414 | && rel->r_addend == 0); | |
3415 | if (h && h->plt.offset == MINUS_ONE | |
3416 | && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
3417 | { | |
3418 | relocation -= pc; | |
3419 | relocation += rel->r_addend; | |
3420 | } | |
3421 | else | |
3422 | relocation = sec_addr (plt) + h->plt.offset - pc; | |
3423 | } | |
3424 | ||
3425 | break; | |
3426 | ||
3427 | case R_LARCH_ABS_HI20: | |
3428 | case R_LARCH_ABS_LO12: | |
3429 | case R_LARCH_ABS64_LO20: | |
3430 | case R_LARCH_ABS64_HI12: | |
6d13722a | 3431 | |
3432 | if (is_undefweak) | |
3433 | { | |
3434 | BFD_ASSERT (resolved_dynly); | |
3435 | relocation = 0; | |
e214f8db | 3436 | break; |
3437 | } | |
6d13722a | 3438 | else if (resolved_to_const || resolved_local) |
3439 | { | |
3440 | relocation += rel->r_addend; | |
3441 | } | |
3442 | else if (resolved_dynly) | |
3443 | { | |
3444 | unresolved_reloc = false; | |
3445 | BFD_ASSERT ((plt && h && h->plt.offset != MINUS_ONE) | |
3446 | && rel->r_addend == 0); | |
3447 | relocation = sec_addr (plt) + h->plt.offset; | |
3448 | } | |
3449 | ||
3450 | break; | |
3451 | ||
1b6fccd2 | 3452 | case R_LARCH_PCREL20_S2: |
3453 | unresolved_reloc = false; | |
3454 | if (h && h->plt.offset != MINUS_ONE) | |
3455 | relocation = sec_addr (plt) + h->plt.offset; | |
3456 | else | |
3457 | relocation += rel->r_addend; | |
3458 | relocation -= pc; | |
3459 | break; | |
3460 | ||
6d13722a | 3461 | case R_LARCH_PCALA_HI20: |
3462 | unresolved_reloc = false; | |
3463 | if (h && h->plt.offset != MINUS_ONE) | |
3464 | relocation = sec_addr (plt) + h->plt.offset; | |
3465 | else | |
3466 | relocation += rel->r_addend; | |
e214f8db | 3467 | |
6d13722a | 3468 | RELOCATE_CALC_PC32_HI20 (relocation, pc); |
6d13722a | 3469 | break; |
3470 | ||
aae8784c | 3471 | case R_LARCH_TLS_LE_HI20_R: |
a0aa6f4a | 3472 | relocation += rel->r_addend; |
b67a17aa | 3473 | relocation = tlsoff (info, relocation); |
aae8784c | 3474 | RELOCATE_TLS_TP32_HI20 (relocation); |
aae8784c | 3475 | break; |
3476 | ||
6d13722a | 3477 | case R_LARCH_PCALA_LO12: |
3478 | /* Not support if sym_addr in 2k page edge. | |
3479 | pcalau12i pc_hi20 (sym_addr) | |
3480 | ld.w/d pc_lo12 (sym_addr) | |
3481 | ld.w/d pc_lo12 (sym_addr + x) | |
3482 | ... | |
3483 | can not calc correct address | |
3484 | if sym_addr < 0x800 && sym_addr + x >= 0x800. */ | |
3485 | ||
3486 | if (h && h->plt.offset != MINUS_ONE) | |
3487 | relocation = sec_addr (plt) + h->plt.offset; | |
3488 | else | |
3489 | relocation += rel->r_addend; | |
e214f8db | 3490 | |
27121f67 NC |
3491 | /* For 2G jump, generate pcalau12i, jirl. */ |
3492 | /* If use jirl, turns to R_LARCH_B16. */ | |
3493 | uint32_t insn = bfd_get (32, input_bfd, contents + rel->r_offset); | |
3494 | if ((insn & 0x4c000000) == 0x4c000000) | |
e214f8db | 3495 | { |
1b6fccd2 | 3496 | relocation &= 0xfff; |
3497 | /* Signed extend. */ | |
3498 | relocation = (relocation ^ 0x800) - 0x800; | |
3499 | ||
27121f67 NC |
3500 | rel->r_info = ELFNN_R_INFO (r_symndx, R_LARCH_B16); |
3501 | howto = loongarch_elf_rtype_to_howto (input_bfd, R_LARCH_B16); | |
e214f8db | 3502 | } |
6d13722a | 3503 | break; |
e214f8db | 3504 | |
6d13722a | 3505 | case R_LARCH_PCALA64_HI12: |
6590ec80 XR |
3506 | pc -= 4; |
3507 | /* Fall through. */ | |
3508 | case R_LARCH_PCALA64_LO20: | |
6d13722a | 3509 | if (h && h->plt.offset != MINUS_ONE) |
bc2a35c0 | 3510 | relocation = sec_addr (plt) + h->plt.offset; |
6d13722a | 3511 | else |
3512 | relocation += rel->r_addend; | |
3513 | ||
6590ec80 | 3514 | RELOCATE_CALC_PC64_HI32 (relocation, pc - 8); |
6d13722a | 3515 | |
3516 | break; | |
3517 | ||
3518 | case R_LARCH_GOT_PC_HI20: | |
3519 | case R_LARCH_GOT_HI20: | |
3520 | /* Calc got offset. */ | |
3521 | { | |
3522 | unresolved_reloc = false; | |
3523 | BFD_ASSERT (rel->r_addend == 0); | |
3524 | ||
3525 | bfd_vma got_off = 0; | |
3526 | if (h != NULL) | |
3527 | { | |
3528 | /* GOT ref or ifunc. */ | |
3529 | BFD_ASSERT (h->got.offset != MINUS_ONE | |
3530 | || h->type == STT_GNU_IFUNC); | |
3531 | ||
3532 | got_off = h->got.offset & (~(bfd_vma)1); | |
3533 | /* Hidden symbol not has got entry, | |
3534 | * only got.plt entry so it is (plt - got). */ | |
3535 | if (h->got.offset == MINUS_ONE && h->type == STT_GNU_IFUNC) | |
3536 | { | |
3537 | bfd_vma idx; | |
3538 | if (htab->elf.splt != NULL) | |
3539 | { | |
3540 | idx = (h->plt.offset - PLT_HEADER_SIZE) | |
3541 | / PLT_ENTRY_SIZE; | |
3542 | got_off = sec_addr (htab->elf.sgotplt) | |
3543 | + GOTPLT_HEADER_SIZE | |
3544 | + (idx * GOT_ENTRY_SIZE) | |
3545 | - sec_addr (htab->elf.sgot); | |
3546 | } | |
3547 | else | |
3548 | { | |
3549 | idx = h->plt.offset / PLT_ENTRY_SIZE; | |
3550 | got_off = sec_addr (htab->elf.sgotplt) | |
3551 | + (idx * GOT_ENTRY_SIZE) | |
3552 | - sec_addr (htab->elf.sgot); | |
3553 | } | |
3554 | } | |
3555 | ||
3556 | if ((h->got.offset & 1) == 0) | |
3557 | { | |
3558 | /* We need to generate a R_LARCH_RELATIVE reloc once | |
3559 | * in loongarch_elf_finish_dynamic_symbol or now, | |
3560 | * call finish_dyn && nopic | |
3561 | * or !call finish_dyn && pic. */ | |
3562 | if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (is_dyn, | |
3563 | bfd_link_pic (info), | |
3564 | h) | |
3565 | && bfd_link_pic (info) | |
3566 | && SYMBOL_REFERENCES_LOCAL (info, h)) | |
3567 | { | |
3568 | Elf_Internal_Rela rela; | |
3569 | rela.r_offset = sec_addr (got) + got_off; | |
3570 | rela.r_info = ELFNN_R_INFO (0, R_LARCH_RELATIVE); | |
3571 | rela.r_addend = relocation; | |
3572 | loongarch_elf_append_rela (output_bfd, | |
3573 | htab->elf.srelgot, &rela); | |
3574 | } | |
3575 | h->got.offset |= 1; | |
6224a6c2 XR |
3576 | bfd_put_NN (output_bfd, relocation, |
3577 | got->contents + got_off); | |
6d13722a | 3578 | } |
3579 | } | |
3580 | else | |
3581 | { | |
3582 | BFD_ASSERT (local_got_offsets | |
3583 | && local_got_offsets[r_symndx] != MINUS_ONE); | |
3584 | ||
3585 | got_off = local_got_offsets[r_symndx] & (~(bfd_vma)1); | |
3586 | if ((local_got_offsets[r_symndx] & 1) == 0) | |
3587 | { | |
3588 | if (bfd_link_pic (info)) | |
3589 | { | |
3590 | Elf_Internal_Rela rela; | |
3591 | rela.r_offset = sec_addr (got) + got_off; | |
3592 | rela.r_info = ELFNN_R_INFO (0, R_LARCH_RELATIVE); | |
3593 | rela.r_addend = relocation; | |
3594 | loongarch_elf_append_rela (output_bfd, | |
3595 | htab->elf.srelgot, &rela); | |
3596 | } | |
3597 | local_got_offsets[r_symndx] |= 1; | |
3598 | } | |
6224a6c2 | 3599 | bfd_put_NN (output_bfd, relocation, got->contents + got_off); |
6d13722a | 3600 | } |
3601 | ||
6d13722a | 3602 | relocation = got_off + sec_addr (got); |
3603 | } | |
3604 | ||
3605 | if (r_type == R_LARCH_GOT_PC_HI20) | |
3606 | RELOCATE_CALC_PC32_HI20 (relocation, pc); | |
3607 | ||
3608 | break; | |
3609 | ||
3610 | case R_LARCH_GOT_PC_LO12: | |
3611 | case R_LARCH_GOT64_PC_LO20: | |
3612 | case R_LARCH_GOT64_PC_HI12: | |
3613 | case R_LARCH_GOT_LO12: | |
3614 | case R_LARCH_GOT64_LO20: | |
3615 | case R_LARCH_GOT64_HI12: | |
3616 | { | |
3617 | unresolved_reloc = false; | |
3618 | bfd_vma got_off; | |
3619 | if (h) | |
3620 | got_off = h->got.offset & (~(bfd_vma)1); | |
3621 | else | |
3622 | got_off = local_got_offsets[r_symndx] & (~(bfd_vma)1); | |
3623 | ||
3624 | if (h && h->got.offset == MINUS_ONE && h->type == STT_GNU_IFUNC) | |
3625 | { | |
3626 | bfd_vma idx; | |
3627 | if (htab->elf.splt != NULL) | |
3628 | idx = (h->plt.offset - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE; | |
3629 | else | |
3630 | idx = h->plt.offset / PLT_ENTRY_SIZE; | |
3631 | ||
3632 | got_off = sec_addr (htab->elf.sgotplt) | |
3633 | + GOTPLT_HEADER_SIZE | |
3634 | + (idx * GOT_ENTRY_SIZE) | |
3635 | - sec_addr (htab->elf.sgot); | |
3636 | } | |
1b6fccd2 | 3637 | |
6d13722a | 3638 | relocation = got_off + sec_addr (got); |
3639 | } | |
3640 | ||
6590ec80 XR |
3641 | if (r_type == R_LARCH_GOT64_PC_HI12) |
3642 | RELOCATE_CALC_PC64_HI32 (relocation, pc - 12); | |
3643 | else if (r_type == R_LARCH_GOT64_PC_LO20) | |
3644 | RELOCATE_CALC_PC64_HI32 (relocation, pc - 8); | |
6d13722a | 3645 | |
3646 | break; | |
3647 | ||
3648 | case R_LARCH_TLS_LE_HI20: | |
3649 | case R_LARCH_TLS_LE_LO12: | |
aae8784c | 3650 | case R_LARCH_TLS_LE_LO12_R: |
6d13722a | 3651 | case R_LARCH_TLS_LE64_LO20: |
3652 | case R_LARCH_TLS_LE64_HI12: | |
3653 | BFD_ASSERT (resolved_local && elf_hash_table (info)->tls_sec); | |
3654 | ||
a0aa6f4a | 3655 | relocation += rel->r_addend; |
b67a17aa | 3656 | relocation = tlsoff (info, relocation); |
6d13722a | 3657 | break; |
3658 | ||
3659 | /* TLS IE LD/GD process separately is troublesome. | |
3660 | When a symbol is both ie and LD/GD, h->got.off |= 1 | |
3661 | make only one type be relocated. We must use | |
3662 | h->got.offset |= 1 and h->got.offset |= 2 | |
3663 | diff IE and LD/GD. And all (got_off & (~(bfd_vma)1)) | |
3664 | (IE LD/GD and reusable GOT reloc) must change to | |
3665 | (got_off & (~(bfd_vma)3)), beause we use lowest 2 bits | |
3666 | as a tag. | |
3667 | Now, LD and GD is both GOT_TLS_GD type, LD seems to | |
3668 | can be omitted. */ | |
3669 | case R_LARCH_TLS_IE_PC_HI20: | |
3670 | case R_LARCH_TLS_IE_HI20: | |
3671 | case R_LARCH_TLS_LD_PC_HI20: | |
3672 | case R_LARCH_TLS_LD_HI20: | |
3673 | case R_LARCH_TLS_GD_PC_HI20: | |
3674 | case R_LARCH_TLS_GD_HI20: | |
4f248d61 LC |
3675 | case R_LARCH_TLS_DESC_PC_HI20: |
3676 | case R_LARCH_TLS_DESC_HI20: | |
ae296cc4 | 3677 | case R_LARCH_TLS_LD_PCREL20_S2: |
3678 | case R_LARCH_TLS_GD_PCREL20_S2: | |
3679 | case R_LARCH_TLS_DESC_PCREL20_S2: | |
6d13722a | 3680 | BFD_ASSERT (rel->r_addend == 0); |
3681 | unresolved_reloc = false; | |
3682 | ||
3683 | if (r_type == R_LARCH_TLS_IE_PC_HI20 | |
3684 | || r_type == R_LARCH_TLS_IE_HI20) | |
3685 | is_ie = true; | |
3686 | ||
4f248d61 | 3687 | if (r_type == R_LARCH_TLS_DESC_PC_HI20 |
ae296cc4 | 3688 | || r_type == R_LARCH_TLS_DESC_HI20 |
3689 | || r_type == R_LARCH_TLS_DESC_PCREL20_S2) | |
4f248d61 LC |
3690 | is_desc = true; |
3691 | ||
6d13722a | 3692 | bfd_vma got_off = 0; |
e214f8db | 3693 | if (h != NULL) |
3694 | { | |
6d13722a | 3695 | got_off = h->got.offset; |
e214f8db | 3696 | h->got.offset |= 1; |
3697 | } | |
3698 | else | |
3699 | { | |
6d13722a | 3700 | got_off = local_got_offsets[r_symndx]; |
e214f8db | 3701 | local_got_offsets[r_symndx] |= 1; |
3702 | } | |
3703 | ||
6d13722a | 3704 | BFD_ASSERT (got_off != MINUS_ONE); |
e214f8db | 3705 | |
6d13722a | 3706 | tls_type = _bfd_loongarch_elf_tls_type (input_bfd, h, r_symndx); |
4f248d61 LC |
3707 | |
3708 | /* If a tls variable is accessed in multiple ways, GD uses | |
3709 | the first two slots of GOT, desc follows with two slots, | |
3710 | and IE uses one slot at the end. */ | |
b67a17aa LC |
3711 | off = 0; |
3712 | if (tls_type & GOT_TLS_GD) | |
3713 | off += 2 * GOT_ENTRY_SIZE; | |
3714 | desc_off = off; | |
3715 | if (tls_type & GOT_TLS_GDESC) | |
3716 | off += 2 * GOT_ENTRY_SIZE; | |
3717 | ie_off = off; | |
e214f8db | 3718 | |
6d13722a | 3719 | if ((got_off & 1) == 0) |
e214f8db | 3720 | { |
6d13722a | 3721 | Elf_Internal_Rela rela; |
3722 | asection *relgot = htab->elf.srelgot; | |
e214f8db | 3723 | |
b67a17aa LC |
3724 | int indx = 0; |
3725 | bool need_reloc = false; | |
3726 | LARCH_TLS_GD_IE_NEED_DYN_RELOC (info, is_dyn, h, indx, | |
3727 | need_reloc); | |
e214f8db | 3728 | |
3729 | if (tls_type & GOT_TLS_GD) | |
3730 | { | |
b67a17aa | 3731 | if (need_reloc) |
e214f8db | 3732 | { |
b67a17aa LC |
3733 | /* Dynamic resolved Module ID. */ |
3734 | rela.r_offset = sec_addr (got) + got_off; | |
3735 | rela.r_addend = 0; | |
3736 | rela.r_info = ELFNN_R_INFO (indx,R_LARCH_TLS_DTPMODNN); | |
3737 | bfd_put_NN (output_bfd, 0, got->contents + got_off); | |
3738 | loongarch_elf_append_rela (output_bfd, relgot, &rela); | |
3739 | ||
3740 | if (indx == 0) | |
3741 | { | |
3742 | /* Local symbol, tp offset has been known. */ | |
3743 | BFD_ASSERT (! unresolved_reloc); | |
3744 | bfd_put_NN (output_bfd, | |
3745 | tlsoff (info, relocation), | |
3746 | (got->contents + got_off + GOT_ENTRY_SIZE)); | |
3747 | } | |
6d13722a | 3748 | else |
3749 | { | |
b67a17aa LC |
3750 | /* Dynamic resolved block offset. */ |
3751 | bfd_put_NN (output_bfd, 0, | |
3752 | got->contents + got_off + GOT_ENTRY_SIZE); | |
3753 | rela.r_info = ELFNN_R_INFO (indx, | |
3754 | R_LARCH_TLS_DTPRELNN); | |
3755 | rela.r_offset += GOT_ENTRY_SIZE; | |
6d13722a | 3756 | loongarch_elf_append_rela (output_bfd, relgot, &rela); |
3757 | } | |
6d13722a | 3758 | } |
6d13722a | 3759 | else |
e214f8db | 3760 | { |
b67a17aa LC |
3761 | /* In a static link or an executable link with the symbol |
3762 | binding locally. Mark it as belonging to module 1. */ | |
3763 | bfd_put_NN (output_bfd, 1, got->contents + got_off); | |
3764 | bfd_put_NN (output_bfd, tlsoff (info, relocation), | |
3765 | got->contents + got_off + GOT_ENTRY_SIZE); | |
e214f8db | 3766 | } |
3767 | } | |
4f248d61 LC |
3768 | if (tls_type & GOT_TLS_GDESC) |
3769 | { | |
3770 | /* Unless it is a static link, DESC always emits a | |
3771 | dynamic relocation. */ | |
b67a17aa | 3772 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
4f248d61 LC |
3773 | rela.r_offset = sec_addr (got) + got_off + desc_off; |
3774 | rela.r_addend = 0; | |
3775 | if (indx == 0) | |
b67a17aa | 3776 | rela.r_addend = tlsoff (info, relocation); |
4f248d61 LC |
3777 | |
3778 | rela.r_info = ELFNN_R_INFO (indx, R_LARCH_TLS_DESCNN); | |
3779 | loongarch_elf_append_rela (output_bfd, relgot, &rela); | |
3780 | bfd_put_NN (output_bfd, 0, | |
3781 | got->contents + got_off + desc_off); | |
3782 | } | |
e214f8db | 3783 | if (tls_type & GOT_TLS_IE) |
3784 | { | |
b67a17aa | 3785 | if (need_reloc) |
e214f8db | 3786 | { |
b67a17aa LC |
3787 | bfd_put_NN (output_bfd, 0, |
3788 | got->contents + got_off + ie_off); | |
3789 | rela.r_offset = sec_addr (got) + got_off + ie_off; | |
3790 | rela.r_addend = 0; | |
6d13722a | 3791 | |
b67a17aa LC |
3792 | if (indx == 0) |
3793 | rela.r_addend = tlsoff (info, relocation); | |
3794 | rela.r_info = ELFNN_R_INFO (indx, R_LARCH_TLS_TPRELNN); | |
3795 | loongarch_elf_append_rela (output_bfd, relgot, &rela); | |
6d13722a | 3796 | } |
6d13722a | 3797 | else |
3798 | { | |
b67a17aa LC |
3799 | /* In a static link or an executable link with the symbol |
3800 | bindinglocally, compute offset directly. */ | |
3801 | bfd_put_NN (output_bfd, tlsoff (info, relocation), | |
3802 | got->contents + got_off + ie_off); | |
e214f8db | 3803 | } |
3804 | } | |
3805 | } | |
4f248d61 LC |
3806 | relocation = (got_off & (~(bfd_vma)1)) + sec_addr (got); |
3807 | if (is_desc) | |
3808 | relocation += desc_off; | |
3809 | else if (is_ie) | |
3810 | relocation += ie_off; | |
6d13722a | 3811 | |
3812 | if (r_type == R_LARCH_TLS_LD_PC_HI20 | |
3813 | || r_type == R_LARCH_TLS_GD_PC_HI20 | |
4f248d61 LC |
3814 | || r_type == R_LARCH_TLS_IE_PC_HI20 |
3815 | || r_type == R_LARCH_TLS_DESC_PC_HI20) | |
6d13722a | 3816 | RELOCATE_CALC_PC32_HI20 (relocation, pc); |
ae296cc4 | 3817 | else if (r_type == R_LARCH_TLS_LD_PCREL20_S2 |
3818 | || r_type == R_LARCH_TLS_GD_PCREL20_S2 | |
3819 | || r_type == R_LARCH_TLS_DESC_PCREL20_S2) | |
3820 | relocation -= pc; | |
3821 | /* else {} ABS relocations. */ | |
6d13722a | 3822 | break; |
3823 | ||
4f248d61 LC |
3824 | case R_LARCH_TLS_DESC_PC_LO12: |
3825 | case R_LARCH_TLS_DESC64_PC_LO20: | |
3826 | case R_LARCH_TLS_DESC64_PC_HI12: | |
3827 | case R_LARCH_TLS_DESC_LO12: | |
3828 | case R_LARCH_TLS_DESC64_LO20: | |
3829 | case R_LARCH_TLS_DESC64_HI12: | |
3830 | { | |
3831 | unresolved_reloc = false; | |
3832 | ||
3833 | if (h) | |
3834 | relocation = sec_addr (got) + (h->got.offset & (~(bfd_vma)1)); | |
3835 | else | |
3836 | relocation = sec_addr (got) | |
3837 | + (local_got_offsets[r_symndx] & (~(bfd_vma)1)); | |
3838 | ||
3839 | tls_type = _bfd_loongarch_elf_tls_type (input_bfd, h, r_symndx); | |
3840 | /* Use both TLS_GD and TLS_DESC. */ | |
b67a17aa | 3841 | if (GOT_TLS_GD_BOTH_P (tls_type)) |
4f248d61 | 3842 | relocation += 2 * GOT_ENTRY_SIZE; |
4f248d61 | 3843 | |
6590ec80 XR |
3844 | if (r_type == R_LARCH_TLS_DESC64_PC_LO20) |
3845 | RELOCATE_CALC_PC64_HI32 (relocation, pc - 8); | |
3846 | else if (r_type == R_LARCH_TLS_DESC64_PC_HI12) | |
3847 | RELOCATE_CALC_PC64_HI32 (relocation, pc - 12); | |
4f248d61 LC |
3848 | |
3849 | break; | |
6590ec80 | 3850 | } |
4f248d61 LC |
3851 | |
3852 | case R_LARCH_TLS_DESC_LD: | |
3853 | case R_LARCH_TLS_DESC_CALL: | |
3854 | unresolved_reloc = false; | |
3855 | break; | |
3856 | ||
6d13722a | 3857 | case R_LARCH_TLS_IE_PC_LO12: |
3858 | case R_LARCH_TLS_IE64_PC_LO20: | |
3859 | case R_LARCH_TLS_IE64_PC_HI12: | |
3860 | case R_LARCH_TLS_IE_LO12: | |
3861 | case R_LARCH_TLS_IE64_LO20: | |
3862 | case R_LARCH_TLS_IE64_HI12: | |
3863 | unresolved_reloc = false; | |
3864 | ||
3865 | if (h) | |
4f248d61 | 3866 | relocation = sec_addr (got) + (h->got.offset & (~(bfd_vma)1)); |
6d13722a | 3867 | else |
3868 | relocation = sec_addr (got) | |
4f248d61 | 3869 | + (local_got_offsets[r_symndx] & (~(bfd_vma)1)); |
6d13722a | 3870 | |
3871 | tls_type = _bfd_loongarch_elf_tls_type (input_bfd, h, r_symndx); | |
4f248d61 LC |
3872 | /* Use TLS_GD TLS_DESC and TLS_IE. */ |
3873 | if (GOT_TLS_GD_BOTH_P (tls_type) && (tls_type & GOT_TLS_IE)) | |
3874 | relocation += 4 * GOT_ENTRY_SIZE; | |
3875 | /* Use GOT_TLS_GD_ANY_P (tls_type) and TLS_IE. */ | |
3876 | else if (GOT_TLS_GD_ANY_P (tls_type) && (tls_type & GOT_TLS_IE)) | |
6d13722a | 3877 | relocation += 2 * GOT_ENTRY_SIZE; |
3878 | ||
6590ec80 XR |
3879 | if (r_type == R_LARCH_TLS_IE64_PC_LO20) |
3880 | RELOCATE_CALC_PC64_HI32 (relocation, pc - 8); | |
3881 | else if (r_type == R_LARCH_TLS_IE64_PC_HI12) | |
3882 | RELOCATE_CALC_PC64_HI32 (relocation, pc - 12); | |
6d13722a | 3883 | |
3884 | break; | |
e214f8db | 3885 | |
6d13722a | 3886 | case R_LARCH_RELAX: |
1b6fccd2 | 3887 | case R_LARCH_ALIGN: |
3888 | r = bfd_reloc_continue; | |
3889 | unresolved_reloc = false; | |
e214f8db | 3890 | break; |
3891 | ||
3892 | default: | |
3893 | break; | |
3894 | } | |
3895 | ||
3896 | if (fatal) | |
3897 | break; | |
3898 | ||
3899 | do | |
3900 | { | |
3901 | /* 'unresolved_reloc' means we haven't done it yet. | |
3902 | We need help of dynamic linker to fix this memory location up. */ | |
3903 | if (!unresolved_reloc) | |
3904 | break; | |
3905 | ||
3906 | if (_bfd_elf_section_offset (output_bfd, info, input_section, | |
3907 | rel->r_offset) == MINUS_ONE) | |
3908 | /* WHY? May because it's invalid so skip checking. | |
6d13722a | 3909 | But why dynamic reloc a invalid section? */ |
e214f8db | 3910 | break; |
3911 | ||
3912 | if (input_section->output_section->flags & SEC_DEBUGGING) | |
3913 | { | |
3914 | fatal = (loongarch_reloc_is_fatal | |
3915 | (info, input_bfd, input_section, rel, howto, | |
3916 | bfd_reloc_dangerous, is_undefweak, name, | |
3917 | "Seems dynamic linker not process " | |
3918 | "sections 'SEC_DEBUGGING'.")); | |
3919 | } | |
3920 | if (!is_dyn) | |
3921 | break; | |
3922 | ||
3923 | if ((info->flags & DF_TEXTREL) == 0) | |
3924 | if (input_section->output_section->flags & SEC_READONLY) | |
3925 | info->flags |= DF_TEXTREL; | |
3926 | } | |
3927 | while (0); | |
3928 | ||
3929 | if (fatal) | |
3930 | break; | |
3931 | ||
3932 | loongarch_record_one_reloc (input_bfd, input_section, r_type, | |
3933 | rel->r_offset, sym, h, rel->r_addend); | |
3934 | ||
3935 | if (r != bfd_reloc_continue) | |
3936 | r = perform_relocation (rel, input_section, howto, relocation, | |
3937 | input_bfd, contents); | |
3938 | ||
3939 | switch (r) | |
3940 | { | |
3941 | case bfd_reloc_dangerous: | |
3942 | case bfd_reloc_continue: | |
3943 | case bfd_reloc_ok: | |
3944 | continue; | |
3945 | ||
3946 | case bfd_reloc_overflow: | |
3947 | /* Overflow value can't be filled in. */ | |
3948 | loongarch_dump_reloc_record (info->callbacks->info); | |
3949 | info->callbacks->reloc_overflow | |
3950 | (info, h ? &h->root : NULL, name, howto->name, rel->r_addend, | |
3951 | input_bfd, input_section, rel->r_offset); | |
3952 | break; | |
3953 | ||
3954 | case bfd_reloc_outofrange: | |
3955 | /* Stack state incorrect. */ | |
3956 | loongarch_dump_reloc_record (info->callbacks->info); | |
3957 | info->callbacks->info | |
3958 | ("%X%H: Internal stack state is incorrect.\n" | |
3959 | "Want to push to full stack or pop from empty stack?\n", | |
3960 | input_bfd, input_section, rel->r_offset); | |
3961 | break; | |
3962 | ||
3963 | case bfd_reloc_notsupported: | |
3964 | info->callbacks->info ("%X%H: Unknown relocation type.\n", input_bfd, | |
3965 | input_section, rel->r_offset); | |
3966 | break; | |
3967 | ||
3968 | default: | |
3969 | info->callbacks->info ("%X%H: Internal: unknown error.\n", input_bfd, | |
3970 | input_section, rel->r_offset); | |
3971 | break; | |
3972 | } | |
3973 | ||
3974 | fatal = true; | |
e214f8db | 3975 | } |
3976 | ||
3977 | return !fatal; | |
3978 | } | |
3979 | ||
1b6fccd2 | 3980 | static bool |
3981 | loongarch_relax_delete_bytes (bfd *abfd, | |
3982 | asection *sec, | |
3983 | bfd_vma addr, | |
3984 | size_t count, | |
3985 | struct bfd_link_info *link_info) | |
3986 | { | |
3987 | unsigned int i, symcount; | |
3988 | bfd_vma toaddr = sec->size; | |
3989 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (abfd); | |
3990 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
3991 | unsigned int sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); | |
3992 | struct bfd_elf_section_data *data = elf_section_data (sec); | |
3993 | bfd_byte *contents = data->this_hdr.contents; | |
3994 | ||
3995 | /* Actually delete the bytes. */ | |
3996 | sec->size -= count; | |
3997 | memmove (contents + addr, contents + addr + count, toaddr - addr - count); | |
3998 | ||
3999 | /* Adjust the location of all of the relocs. Note that we need not | |
4000 | adjust the addends, since all PC-relative references must be against | |
4001 | symbols, which we will adjust below. */ | |
4002 | for (i = 0; i < sec->reloc_count; i++) | |
4003 | if (data->relocs[i].r_offset > addr && data->relocs[i].r_offset < toaddr) | |
4004 | data->relocs[i].r_offset -= count; | |
4005 | ||
4006 | /* Adjust the local symbols defined in this section. */ | |
4007 | for (i = 0; i < symtab_hdr->sh_info; i++) | |
4008 | { | |
4009 | Elf_Internal_Sym *sym = (Elf_Internal_Sym *) symtab_hdr->contents + i; | |
4010 | if (sym->st_shndx == sec_shndx) | |
4011 | { | |
4012 | /* If the symbol is in the range of memory we just moved, we | |
4013 | have to adjust its value. */ | |
4014 | if (sym->st_value > addr && sym->st_value <= toaddr) | |
4015 | sym->st_value -= count; | |
4016 | ||
4017 | /* If the symbol *spans* the bytes we just deleted (i.e. its | |
4018 | *end* is in the moved bytes but its *start* isn't), then we | |
4019 | must adjust its size. | |
4020 | ||
4021 | This test needs to use the original value of st_value, otherwise | |
4022 | we might accidentally decrease size when deleting bytes right | |
4023 | before the symbol. But since deleted relocs can't span across | |
4024 | symbols, we can't have both a st_value and a st_size decrease, | |
4025 | so it is simpler to just use an else. */ | |
4026 | else if (sym->st_value <= addr | |
4027 | && sym->st_value + sym->st_size > addr | |
4028 | && sym->st_value + sym->st_size <= toaddr) | |
4029 | sym->st_size -= count; | |
4030 | } | |
4031 | } | |
4032 | ||
4033 | /* Now adjust the global symbols defined in this section. */ | |
4034 | symcount = ((symtab_hdr->sh_size / sizeof (ElfNN_External_Sym)) | |
4035 | - symtab_hdr->sh_info); | |
4036 | ||
4037 | for (i = 0; i < symcount; i++) | |
4038 | { | |
4039 | struct elf_link_hash_entry *sym_hash = sym_hashes[i]; | |
4040 | ||
4041 | /* The '--wrap SYMBOL' option is causing a pain when the object file, | |
4042 | containing the definition of __wrap_SYMBOL, includes a direct | |
4043 | call to SYMBOL as well. Since both __wrap_SYMBOL and SYMBOL reference | |
4044 | the same symbol (which is __wrap_SYMBOL), but still exist as two | |
4045 | different symbols in 'sym_hashes', we don't want to adjust | |
4046 | the global symbol __wrap_SYMBOL twice. | |
4047 | ||
4048 | The same problem occurs with symbols that are versioned_hidden, as | |
4049 | foo becomes an alias for foo@BAR, and hence they need the same | |
4050 | treatment. */ | |
4051 | if (link_info->wrap_hash != NULL | |
4052 | || sym_hash->versioned != unversioned) | |
4053 | { | |
4054 | struct elf_link_hash_entry **cur_sym_hashes; | |
4055 | ||
4056 | /* Loop only over the symbols which have already been checked. */ | |
4057 | for (cur_sym_hashes = sym_hashes; cur_sym_hashes < &sym_hashes[i]; | |
4058 | cur_sym_hashes++) | |
4059 | { | |
4060 | /* If the current symbol is identical to 'sym_hash', that means | |
4061 | the symbol was already adjusted (or at least checked). */ | |
4062 | if (*cur_sym_hashes == sym_hash) | |
4063 | break; | |
4064 | } | |
4065 | /* Don't adjust the symbol again. */ | |
4066 | if (cur_sym_hashes < &sym_hashes[i]) | |
4067 | continue; | |
4068 | } | |
4069 | ||
4070 | if ((sym_hash->root.type == bfd_link_hash_defined | |
4071 | || sym_hash->root.type == bfd_link_hash_defweak) | |
4072 | && sym_hash->root.u.def.section == sec) | |
4073 | { | |
4074 | /* As above, adjust the value if needed. */ | |
4075 | if (sym_hash->root.u.def.value > addr | |
4076 | && sym_hash->root.u.def.value <= toaddr) | |
4077 | sym_hash->root.u.def.value -= count; | |
4078 | ||
4079 | /* As above, adjust the size if needed. */ | |
4080 | else if (sym_hash->root.u.def.value <= addr | |
4081 | && sym_hash->root.u.def.value + sym_hash->size > addr | |
4082 | && sym_hash->root.u.def.value + sym_hash->size <= toaddr) | |
4083 | sym_hash->size -= count; | |
4084 | } | |
4085 | } | |
4086 | ||
4087 | return true; | |
4088 | } | |
0e45942b LC |
4089 | |
4090 | /* Start perform TLS type transition. | |
4091 | Currently there are three cases of relocation handled here: | |
4092 | DESC -> IE, DEC -> LE and IE -> LE. */ | |
4093 | static bool | |
4094 | loongarch_tls_perform_trans (bfd *abfd, asection *sec, | |
4095 | Elf_Internal_Rela *rel, | |
4096 | struct elf_link_hash_entry *h, | |
4097 | struct bfd_link_info *info) | |
4098 | { | |
4099 | unsigned long insn; | |
4100 | bool local_exec = bfd_link_executable (info) | |
4101 | && SYMBOL_REFERENCES_LOCAL (info, h); | |
4102 | bfd_byte *contents = elf_section_data (sec)->this_hdr.contents; | |
4103 | unsigned long r_type = ELFNN_R_TYPE (rel->r_info); | |
4104 | unsigned long r_symndx = ELFNN_R_SYM (rel->r_info); | |
4105 | ||
4106 | switch (r_type) | |
4107 | { | |
4108 | case R_LARCH_TLS_DESC_PC_HI20: | |
4109 | if (local_exec) | |
4110 | { | |
4111 | /* DESC -> LE relaxation: | |
4112 | pcalalau12i $a0,%desc_pc_hi20(var) => | |
4113 | lu12i.w $a0,%le_hi20(var) | |
4114 | */ | |
4115 | bfd_put (32, abfd, LARCH_LU12I_W | LARCH_RD_A0, | |
4116 | contents + rel->r_offset); | |
4117 | rel->r_info = ELFNN_R_INFO (r_symndx, R_LARCH_TLS_LE_HI20); | |
4118 | } | |
4119 | else | |
4120 | { | |
4121 | /* DESC -> IE relaxation: | |
4122 | pcalalau12i $a0,%desc_pc_hi20(var) => | |
4123 | pcalalau12i $a0,%ie_pc_hi20(var) | |
4124 | */ | |
4125 | rel->r_info = ELFNN_R_INFO (r_symndx, R_LARCH_TLS_IE_PC_HI20); | |
4126 | } | |
4127 | return true; | |
4128 | ||
4129 | case R_LARCH_TLS_DESC_PC_LO12: | |
4130 | if (local_exec) | |
4131 | { | |
4132 | /* DESC -> LE relaxation: | |
4133 | addi.d $a0,$a0,%desc_pc_lo12(var) => | |
4134 | ori $a0,$a0,le_lo12(var) | |
4135 | */ | |
4136 | insn = LARCH_ORI | LARCH_RD_RJ_A0; | |
4137 | bfd_put (32, abfd, LARCH_ORI | LARCH_RD_RJ_A0, | |
4138 | contents + rel->r_offset); | |
4139 | rel->r_info = ELFNN_R_INFO (r_symndx, R_LARCH_TLS_LE_LO12); | |
4140 | } | |
4141 | else | |
4142 | { | |
4143 | /* DESC -> IE relaxation: | |
4144 | addi.d $a0,$a0,%desc_pc_lo12(var) => | |
4145 | ld.d $a0,$a0,%ie_pc_lo12(var) | |
4146 | */ | |
4147 | bfd_put (32, abfd, LARCH_LD_D | LARCH_RD_RJ_A0, | |
4148 | contents + rel->r_offset); | |
4149 | rel->r_info = ELFNN_R_INFO (r_symndx, R_LARCH_TLS_IE_PC_LO12); | |
4150 | } | |
4151 | return true; | |
4152 | ||
4153 | case R_LARCH_TLS_DESC_LD: | |
4154 | case R_LARCH_TLS_DESC_CALL: | |
4155 | /* DESC -> LE/IE relaxation: | |
4156 | ld.d $ra,$a0,%desc_ld(var) => NOP | |
4157 | jirl $ra,$ra,%desc_call(var) => NOP | |
4158 | */ | |
4159 | rel->r_info = ELFNN_R_INFO (0, R_LARCH_NONE); | |
4160 | bfd_put (32, abfd, LARCH_NOP, contents + rel->r_offset); | |
4161 | /* link with -relax option will delete NOP. */ | |
4162 | if (!info->disable_target_specific_optimizations) | |
4163 | loongarch_relax_delete_bytes (abfd, sec, rel->r_offset, 4, info); | |
4164 | return true; | |
4165 | ||
4166 | case R_LARCH_TLS_IE_PC_HI20: | |
4167 | if (local_exec) | |
4168 | { | |
4169 | /* IE -> LE relaxation: | |
4170 | pcalalau12i $rd,%ie_pc_hi20(var) => | |
4171 | lu12i.w $rd,%le_hi20(var) | |
4172 | */ | |
4173 | insn = bfd_getl32 (contents + rel->r_offset); | |
4174 | bfd_put (32, abfd, LARCH_LU12I_W | (insn & 0x1f), | |
4175 | contents + rel->r_offset); | |
4176 | rel->r_info = ELFNN_R_INFO (r_symndx, R_LARCH_TLS_LE_HI20); | |
4177 | } | |
4178 | return true; | |
4179 | ||
4180 | case R_LARCH_TLS_IE_PC_LO12: | |
4181 | if (local_exec) | |
4182 | { | |
4183 | /* IE -> LE relaxation: | |
4184 | ld.d $rd,$rj,%%ie_pc_lo12(var) => | |
4185 | ori $rd,$rj,le_lo12(var) | |
4186 | */ | |
4187 | insn = bfd_getl32 (contents + rel->r_offset); | |
4188 | bfd_put (32, abfd, LARCH_ORI | (insn & 0x3ff), | |
4189 | contents + rel->r_offset); | |
4190 | rel->r_info = ELFNN_R_INFO (r_symndx, R_LARCH_TLS_LE_LO12); | |
4191 | } | |
4192 | return true; | |
4193 | } | |
4194 | ||
4195 | return false; | |
4196 | } | |
4197 | ||
4198 | ||
aae8784c | 4199 | /* Relax tls le, mainly relax the process of getting TLS le symbolic addresses. |
4200 | there are three situations in which an assembly instruction sequence needs to | |
4201 | be relaxed: | |
4202 | symbol address = tp + offset (symbol),offset (symbol) = le_hi20_r + le_lo12_r | |
4203 | ||
4204 | Case 1: | |
4205 | in this case, the rd register in the st.{w/d} instruction does not store the | |
4206 | full tls symbolic address, but tp + le_hi20_r, which is a part of the tls | |
4207 | symbolic address, and then obtains the rd + le_lo12_r address through the | |
4208 | st.w instruction feature. | |
4209 | this is the full tls symbolic address (tp + le_hi20_r + le_lo12_r). | |
4210 | ||
4211 | before relax: after relax: | |
4212 | ||
4213 | lu12i.w $rd,%le_hi20_r (sym) ==> (instruction deleted) | |
4214 | add.{w/d} $rd,$rd,$tp,%le_add_r (sym) ==> (instruction deleted) | |
4215 | st.{w/d} $rs,$rd,%le_lo12_r (sym) ==> st.{w/d} $rs,$tp,%le_lo12_r (sym) | |
4216 | ||
4217 | Case 2: | |
4218 | in this case, ld.{w/d} is similar to st.{w/d} in case1. | |
4219 | ||
4220 | before relax: after relax: | |
4221 | ||
4222 | lu12i.w $rd,%le_hi20_r (sym) ==> (instruction deleted) | |
4223 | add.{w/d} $rd,$rd,$tp,%le_add_r (sym) ==> (instruction deleted) | |
4224 | ld.{w/d} $rs,$rd,%le_lo12_r (sym) ==> ld.{w/d} $rs,$tp,%le_lo12_r (sym) | |
4225 | ||
4226 | Case 3: | |
4227 | in this case,the rs register in addi.{w/d} stores the full address of the tls | |
4228 | symbol (tp + le_hi20_r + le_lo12_r). | |
4229 | ||
4230 | before relax: after relax: | |
4231 | ||
4232 | lu12i.w $rd,%le_hi20_r (sym) ==> (instruction deleted) | |
4233 | add.{w/d} $rd,$rd,$tp,%le_add_r (sym) ==> (instruction deleted) | |
4234 | addi.{w/d} $rs,$rd,%le_lo12_r (sym) ==> addi.{w/d} $rs,$tp,%le_lo12_r (sym) | |
0e45942b LC |
4235 | |
4236 | ||
4237 | For relocation of all old LE instruction sequences, whether it is | |
4238 | a normal code model or an extreme code model, relaxation will be | |
4239 | performed when the relaxation conditions are met. | |
4240 | ||
4241 | nomal code model: | |
4242 | lu12i.w $rd,%le_hi20(sym) => (deleted) | |
4243 | ori $rd,$rd,le_lo12(sym) => ori $rd,$zero,le_lo12(sym) | |
4244 | ||
4245 | extreme code model: | |
4246 | lu12i.w $rd,%le_hi20(sym) => (deleted) | |
4247 | ori $rd,$rd,%le_lo12(sym) => ori $rd,$zero,le_lo12(sym) | |
4248 | lu32i.d $rd,%le64_lo20(sym) => (deleted) | |
4249 | lu52i.d $rd,$rd,%le64_hi12(sym) => (deleted) | |
aae8784c | 4250 | */ |
4251 | static bool | |
4252 | loongarch_relax_tls_le (bfd *abfd, asection *sec, | |
4253 | Elf_Internal_Rela *rel, | |
4254 | struct bfd_link_info *link_info, | |
4255 | bfd_vma symval) | |
4256 | { | |
4257 | bfd_byte *contents = elf_section_data (sec)->this_hdr.contents; | |
4258 | uint32_t insn = bfd_get (32, abfd, contents + rel->r_offset); | |
4259 | static uint32_t insn_rj,insn_rd; | |
4260 | symval = symval - elf_hash_table (link_info)->tls_sec->vma; | |
0e45942b LC |
4261 | /* The old LE instruction sequence can be relaxed when the symbol offset |
4262 | is smaller than the 12-bit range. */ | |
4263 | if (ELFNN_R_TYPE ((rel + 1)->r_info) == R_LARCH_RELAX && (symval <= 0xfff)) | |
aae8784c | 4264 | { |
4265 | switch (ELFNN_R_TYPE (rel->r_info)) | |
4266 | { | |
0e45942b LC |
4267 | /*if offset < 0x800, then perform the new le instruction |
4268 | sequence relax. */ | |
4269 | case R_LARCH_TLS_LE_HI20_R: | |
4270 | case R_LARCH_TLS_LE_ADD_R: | |
4271 | /* delete insn. */ | |
4272 | if (symval < 0x800) | |
4273 | { | |
4274 | rel->r_info = ELFNN_R_INFO (0, R_LARCH_NONE); | |
4275 | loongarch_relax_delete_bytes (abfd, sec, rel->r_offset, | |
4276 | 4, link_info); | |
4277 | } | |
4278 | break; | |
4279 | ||
4280 | case R_LARCH_TLS_LE_LO12_R: | |
4281 | if (symval < 0x800) | |
4282 | { | |
4283 | /* Change rj to $tp. */ | |
4284 | insn_rj = 0x2 << 5; | |
4285 | /* Get rd register. */ | |
4286 | insn_rd = insn & 0x1f; | |
4287 | /* Write symbol offset. */ | |
4288 | symval <<= 10; | |
4289 | /* Writes the modified instruction. */ | |
4290 | insn = insn & 0xffc00000; | |
4291 | insn = insn | symval | insn_rj | insn_rd; | |
4292 | bfd_put (32, abfd, insn, contents + rel->r_offset); | |
4293 | } | |
4294 | break; | |
4295 | ||
4296 | case R_LARCH_TLS_LE_HI20: | |
4297 | case R_LARCH_TLS_LE64_LO20: | |
4298 | case R_LARCH_TLS_LE64_HI12: | |
4299 | rel->r_info = ELFNN_R_INFO (0, R_LARCH_NONE); | |
4300 | loongarch_relax_delete_bytes (abfd, sec, rel->r_offset, | |
4301 | 4, link_info); | |
4302 | break; | |
4303 | ||
4304 | case R_LARCH_TLS_LE_LO12: | |
4305 | bfd_put (32, abfd, LARCH_ORI | (insn & 0x1f), | |
4306 | contents + rel->r_offset); | |
4307 | break; | |
4308 | ||
4309 | default: | |
4310 | break; | |
aae8784c | 4311 | } |
4312 | } | |
4313 | return true; | |
4314 | } | |
1b6fccd2 | 4315 | |
4316 | /* Relax pcalau12i,addi.d => pcaddi. */ | |
4317 | static bool | |
4f2469d0 | 4318 | loongarch_relax_pcala_addi (bfd *abfd, asection *sec, asection *sym_sec, |
156a2edb | 4319 | Elf_Internal_Rela *rel_hi, bfd_vma symval, |
4320 | struct bfd_link_info *info, bool *again, | |
4321 | bfd_vma max_alignment) | |
1b6fccd2 | 4322 | { |
4323 | bfd_byte *contents = elf_section_data (sec)->this_hdr.contents; | |
4324 | Elf_Internal_Rela *rel_lo = rel_hi + 2; | |
4325 | uint32_t pca = bfd_get (32, abfd, contents + rel_hi->r_offset); | |
4326 | uint32_t add = bfd_get (32, abfd, contents + rel_lo->r_offset); | |
4327 | uint32_t rd = pca & 0x1f; | |
4f2469d0 | 4328 | |
4329 | /* This section's output_offset need to subtract the bytes of instructions | |
4330 | relaxed by the previous sections, so it needs to be updated beforehand. | |
4331 | size_input_section already took care of updating it after relaxation, | |
4332 | so we additionally update once here. */ | |
4333 | sec->output_offset = sec->output_section->size; | |
1b6fccd2 | 4334 | bfd_vma pc = sec_addr (sec) + rel_hi->r_offset; |
4f2469d0 | 4335 | |
4336 | /* If pc and symbol not in the same segment, add/sub segment alignment. | |
156a2edb | 4337 | FIXME: if there are multiple readonly segments? How to determine if |
4338 | two sections are in the same segment. */ | |
4f2469d0 | 4339 | if (!(sym_sec->flags & SEC_READONLY)) |
4340 | { | |
156a2edb | 4341 | max_alignment = info->maxpagesize > max_alignment ? info->maxpagesize |
4342 | : max_alignment; | |
4f2469d0 | 4343 | if (symval > pc) |
156a2edb | 4344 | pc -= max_alignment; |
4f2469d0 | 4345 | else if (symval < pc) |
156a2edb | 4346 | pc += max_alignment; |
4f2469d0 | 4347 | } |
156a2edb | 4348 | else |
4349 | if (symval > pc) | |
4350 | pc -= max_alignment; | |
4351 | else if (symval < pc) | |
4352 | pc += max_alignment; | |
4f2469d0 | 4353 | |
1b6fccd2 | 4354 | const uint32_t addi_d = 0x02c00000; |
4355 | const uint32_t pcaddi = 0x18000000; | |
4356 | ||
4357 | /* Is pcalau12i + addi.d insns? */ | |
4358 | if ((ELFNN_R_TYPE (rel_lo->r_info) != R_LARCH_PCALA_LO12) | |
4359 | || (ELFNN_R_TYPE ((rel_lo + 1)->r_info) != R_LARCH_RELAX) | |
4360 | || (ELFNN_R_TYPE ((rel_hi + 1)->r_info) != R_LARCH_RELAX) | |
4361 | || (rel_hi->r_offset + 4 != rel_lo->r_offset) | |
4362 | || ((add & addi_d) != addi_d) | |
4363 | /* Is pcalau12i $rd + addi.d $rd,$rd? */ | |
4364 | || ((add & 0x1f) != rd) | |
4365 | || (((add >> 5) & 0x1f) != rd) | |
4366 | /* Can be relaxed to pcaddi? */ | |
4367 | || (symval & 0x3) /* 4 bytes align. */ | |
4368 | || ((bfd_signed_vma)(symval - pc) < (bfd_signed_vma)(int32_t)0xffe00000) | |
4369 | || ((bfd_signed_vma)(symval - pc) > (bfd_signed_vma)(int32_t)0x1ffffc)) | |
4370 | return false; | |
4371 | ||
b130a084 | 4372 | /* Continue next relax trip. */ |
4373 | *again = true; | |
4374 | ||
1b6fccd2 | 4375 | pca = pcaddi | rd; |
4376 | bfd_put (32, abfd, pca, contents + rel_hi->r_offset); | |
4377 | ||
4378 | /* Adjust relocations. */ | |
4379 | rel_hi->r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel_hi->r_info), | |
4380 | R_LARCH_PCREL20_S2); | |
4e94082d | 4381 | rel_lo->r_info = ELFNN_R_INFO (0, R_LARCH_NONE); |
4382 | ||
4383 | loongarch_relax_delete_bytes (abfd, sec, rel_lo->r_offset, 4, info); | |
1b6fccd2 | 4384 | |
4385 | return true; | |
4386 | } | |
4387 | ||
97ce7870 | 4388 | /* call36 f -> bl f |
4389 | tail36 $t0, f -> b f. */ | |
4390 | static bool | |
4391 | loongarch_relax_call36 (bfd *abfd, asection *sec, | |
4392 | Elf_Internal_Rela *rel, bfd_vma symval, | |
4393 | struct bfd_link_info *info, bool *again, | |
4394 | bfd_vma max_alignment) | |
4395 | { | |
4396 | bfd_byte *contents = elf_section_data (sec)->this_hdr.contents; | |
4397 | uint32_t jirl = bfd_get (32, abfd, contents + rel->r_offset + 4); | |
4398 | uint32_t rd = jirl & 0x1f; | |
4399 | ||
4400 | /* This section's output_offset need to subtract the bytes of instructions | |
4401 | relaxed by the previous sections, so it needs to be updated beforehand. | |
4402 | size_input_section already took care of updating it after relaxation, | |
4403 | so we additionally update once here. */ | |
4404 | sec->output_offset = sec->output_section->size; | |
4405 | bfd_vma pc = sec_addr (sec) + rel->r_offset; | |
4406 | ||
4407 | /* If pc and symbol not in the same segment, add/sub segment alignment. | |
4408 | FIXME: if there are multiple readonly segments? How to determine if | |
4409 | two sections are in the same segment. */ | |
4410 | if (symval > pc) | |
4411 | pc -= (max_alignment > 4 ? max_alignment : 0); | |
4412 | else if (symval < pc) | |
4413 | pc += (max_alignment > 4 ? max_alignment : 0); | |
4414 | ||
4415 | const uint32_t jirl_opcode = 0x4c000000; | |
4416 | ||
4417 | /* Is pcalau12i + addi.d insns? */ | |
4418 | if ((ELFNN_R_TYPE ((rel + 1)->r_info) != R_LARCH_RELAX) | |
4419 | || ((jirl & jirl_opcode) != jirl_opcode) | |
4420 | || ((bfd_signed_vma)(symval - pc) < (bfd_signed_vma)(int32_t)0xf8000000) | |
4421 | || ((bfd_signed_vma)(symval - pc) > (bfd_signed_vma)(int32_t)0x7fffffc)) | |
4422 | return false; | |
4423 | ||
4424 | /* Continue next relax trip. */ | |
4425 | *again = true; | |
4426 | ||
4427 | const uint32_t bl = 0x54000000; | |
4428 | const uint32_t b = 0x50000000; | |
4429 | ||
4430 | if (rd) | |
4431 | bfd_put (32, abfd, bl, contents + rel->r_offset); | |
4432 | else | |
4433 | bfd_put (32, abfd, b, contents + rel->r_offset); | |
4434 | ||
4435 | /* Adjust relocations. */ | |
4436 | rel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info), R_LARCH_B26); | |
4437 | /* Delete jirl instruction. */ | |
4438 | loongarch_relax_delete_bytes (abfd, sec, rel->r_offset + 4, 4, info); | |
4439 | return true; | |
4440 | } | |
4441 | ||
1b6fccd2 | 4442 | /* Relax pcalau12i,ld.d => pcalau12i,addi.d. */ |
4443 | static bool | |
4444 | loongarch_relax_pcala_ld (bfd *abfd, asection *sec, | |
4445 | Elf_Internal_Rela *rel_hi) | |
4446 | { | |
4447 | bfd_byte *contents = elf_section_data (sec)->this_hdr.contents; | |
4448 | Elf_Internal_Rela *rel_lo = rel_hi + 2; | |
4449 | uint32_t pca = bfd_get (32, abfd, contents + rel_hi->r_offset); | |
4450 | uint32_t ld = bfd_get (32, abfd, contents + rel_lo->r_offset); | |
4451 | uint32_t rd = pca & 0x1f; | |
4452 | const uint32_t ld_d = 0x28c00000; | |
4453 | uint32_t addi_d = 0x02c00000; | |
4454 | ||
4455 | if ((ELFNN_R_TYPE (rel_lo->r_info) != R_LARCH_GOT_PC_LO12) | |
4456 | || (ELFNN_R_TYPE ((rel_lo + 1)->r_info) != R_LARCH_RELAX) | |
4457 | || (ELFNN_R_TYPE ((rel_hi + 1)->r_info) != R_LARCH_RELAX) | |
4458 | || (rel_hi->r_offset + 4 != rel_lo->r_offset) | |
4459 | || ((ld & 0x1f) != rd) | |
4460 | || (((ld >> 5) & 0x1f) != rd) | |
4461 | || ((ld & ld_d) != ld_d)) | |
4462 | return false; | |
4463 | ||
4464 | addi_d = addi_d | (rd << 5) | rd; | |
4465 | bfd_put (32, abfd, addi_d, contents + rel_lo->r_offset); | |
4466 | ||
4467 | rel_hi->r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel_hi->r_info), | |
4468 | R_LARCH_PCALA_HI20); | |
4469 | rel_lo->r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel_lo->r_info), | |
4470 | R_LARCH_PCALA_LO12); | |
4471 | return true; | |
4472 | } | |
4473 | ||
4474 | /* Called by after_allocation to set the information of data segment | |
4475 | before relaxing. */ | |
4476 | ||
4477 | void | |
4478 | bfd_elfNN_loongarch_set_data_segment_info (struct bfd_link_info *info, | |
4479 | int *data_segment_phase) | |
4480 | { | |
4481 | struct loongarch_elf_link_hash_table *htab = loongarch_elf_hash_table (info); | |
4482 | htab->data_segment_phase = data_segment_phase; | |
4483 | } | |
4484 | ||
4485 | /* Implement R_LARCH_ALIGN by deleting excess alignment NOPs. | |
4486 | Once we've handled an R_LARCH_ALIGN, we can't relax anything else. */ | |
4487 | static bool | |
4488 | loongarch_relax_align (bfd *abfd, asection *sec, | |
4489 | asection *sym_sec, | |
4490 | struct bfd_link_info *link_info, | |
4491 | Elf_Internal_Rela *rel, | |
4492 | bfd_vma symval) | |
4493 | { | |
c3d507ab | 4494 | bfd_vma addend, max = 0, alignment = 1; |
1b6fccd2 | 4495 | |
375beedf AM |
4496 | int sym_index = ELFNN_R_SYM (rel->r_info); |
4497 | if (sym_index > 0) | |
c3d507ab | 4498 | { |
4499 | alignment = 1 << (rel->r_addend & 0xff); | |
4500 | max = rel->r_addend >> 8; | |
4501 | } | |
4502 | else | |
4503 | alignment = rel->r_addend + 4; | |
1b6fccd2 | 4504 | |
c3d507ab | 4505 | addend = alignment - 4; /* The bytes of NOPs added by R_LARCH_ALIGN. */ |
4506 | symval -= addend; /* The address of first NOP added by R_LARCH_ALIGN. */ | |
4507 | bfd_vma aligned_addr = ((symval - 1) & ~(alignment - 1)) + alignment; | |
4508 | bfd_vma need_nop_bytes = aligned_addr - symval; /* */ | |
1b6fccd2 | 4509 | |
4510 | /* Make sure there are enough NOPs to actually achieve the alignment. */ | |
c3d507ab | 4511 | if (addend < need_nop_bytes) |
1b6fccd2 | 4512 | { |
4513 | _bfd_error_handler | |
4514 | (_("%pB(%pA+%#" PRIx64 "): %" PRId64 " bytes required for alignment " | |
4515 | "to %" PRId64 "-byte boundary, but only %" PRId64 " present"), | |
4516 | abfd, sym_sec, (uint64_t) rel->r_offset, | |
c3d507ab | 4517 | (int64_t) need_nop_bytes, (int64_t) alignment, (int64_t) addend); |
1b6fccd2 | 4518 | bfd_set_error (bfd_error_bad_value); |
4519 | return false; | |
4520 | } | |
4521 | ||
c3d507ab | 4522 | /* Once we've handled an R_LARCH_ALIGN in a section, |
4523 | we can't relax anything else in this section. */ | |
4524 | sec->sec_flg0 = true; | |
1b6fccd2 | 4525 | rel->r_info = ELFNN_R_INFO (0, R_LARCH_NONE); |
4526 | ||
c3d507ab | 4527 | /* If skipping more bytes than the specified maximum, |
4528 | then the alignment is not done at all and delete all NOPs. */ | |
4529 | if (max > 0 && need_nop_bytes > max) | |
4530 | return loongarch_relax_delete_bytes (abfd, sec, rel->r_offset, | |
4531 | addend, link_info); | |
4532 | ||
1b6fccd2 | 4533 | /* If the number of NOPs is already correct, there's nothing to do. */ |
c3d507ab | 4534 | if (need_nop_bytes == addend) |
1b6fccd2 | 4535 | return true; |
4536 | ||
1b6fccd2 | 4537 | /* Delete the excess NOPs. */ |
c3d507ab | 4538 | return loongarch_relax_delete_bytes (abfd, sec, |
4539 | rel->r_offset + need_nop_bytes, | |
4540 | addend - need_nop_bytes, link_info); | |
1b6fccd2 | 4541 | } |
4542 | ||
ae296cc4 | 4543 | /* Relax pcalau12i + addi.d of TLS LD/GD/DESC to pcaddi. */ |
4544 | static bool | |
4545 | loongarch_relax_tls_ld_gd_desc (bfd *abfd, asection *sec, asection *sym_sec, | |
156a2edb | 4546 | Elf_Internal_Rela *rel_hi, bfd_vma symval, |
4547 | struct bfd_link_info *info, bool *again, | |
4548 | bfd_vma max_alignment) | |
ae296cc4 | 4549 | { |
4550 | bfd_byte *contents = elf_section_data (sec)->this_hdr.contents; | |
4551 | Elf_Internal_Rela *rel_lo = rel_hi + 2; | |
4552 | uint32_t pca = bfd_get (32, abfd, contents + rel_hi->r_offset); | |
4553 | uint32_t add = bfd_get (32, abfd, contents + rel_lo->r_offset); | |
4554 | uint32_t rd = pca & 0x1f; | |
4555 | ||
4556 | /* This section's output_offset need to subtract the bytes of instructions | |
4557 | relaxed by the previous sections, so it needs to be updated beforehand. | |
4558 | size_input_section already took care of updating it after relaxation, | |
4559 | so we additionally update once here. */ | |
4560 | sec->output_offset = sec->output_section->size; | |
4561 | bfd_vma pc = sec_addr (sec) + rel_hi->r_offset; | |
4562 | ||
4563 | /* If pc and symbol not in the same segment, add/sub segment alignment. | |
4564 | FIXME: if there are multiple readonly segments? */ | |
4565 | if (!(sym_sec->flags & SEC_READONLY)) | |
4566 | { | |
156a2edb | 4567 | max_alignment = info->maxpagesize > max_alignment ? info->maxpagesize |
4568 | : max_alignment; | |
ae296cc4 | 4569 | if (symval > pc) |
156a2edb | 4570 | pc -= max_alignment; |
ae296cc4 | 4571 | else if (symval < pc) |
156a2edb | 4572 | pc += max_alignment; |
ae296cc4 | 4573 | } |
156a2edb | 4574 | else |
4575 | if (symval > pc) | |
4576 | pc -= max_alignment; | |
4577 | else if (symval < pc) | |
4578 | pc += max_alignment; | |
ae296cc4 | 4579 | |
4580 | const uint32_t addi_d = 0x02c00000; | |
4581 | const uint32_t pcaddi = 0x18000000; | |
4582 | ||
4583 | /* Is pcalau12i + addi.d insns? */ | |
4584 | if ((ELFNN_R_TYPE (rel_lo->r_info) != R_LARCH_GOT_PC_LO12 | |
4585 | && ELFNN_R_TYPE (rel_lo->r_info) != R_LARCH_TLS_DESC_PC_LO12) | |
4586 | || (ELFNN_R_TYPE ((rel_lo + 1)->r_info) != R_LARCH_RELAX) | |
4587 | || (ELFNN_R_TYPE ((rel_hi + 1)->r_info) != R_LARCH_RELAX) | |
4588 | || (rel_hi->r_offset + 4 != rel_lo->r_offset) | |
4589 | || ((add & addi_d) != addi_d) | |
4590 | /* Is pcalau12i $rd + addi.d $rd,$rd? */ | |
4591 | || ((add & 0x1f) != rd) | |
4592 | || (((add >> 5) & 0x1f) != rd) | |
4593 | /* Can be relaxed to pcaddi? */ | |
4594 | || (symval & 0x3) /* 4 bytes align. */ | |
4595 | || ((bfd_signed_vma)(symval - pc) < (bfd_signed_vma)(int32_t)0xffe00000) | |
4596 | || ((bfd_signed_vma)(symval - pc) > (bfd_signed_vma)(int32_t)0x1ffffc)) | |
4597 | return false; | |
4598 | ||
4599 | /* Continue next relax trip. */ | |
4600 | *again = true; | |
4601 | ||
4602 | pca = pcaddi | rd; | |
4603 | bfd_put (32, abfd, pca, contents + rel_hi->r_offset); | |
4604 | ||
4605 | /* Adjust relocations. */ | |
4606 | switch (ELFNN_R_TYPE (rel_hi->r_info)) | |
4607 | { | |
4608 | case R_LARCH_TLS_LD_PC_HI20: | |
4609 | rel_hi->r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel_hi->r_info), | |
4610 | R_LARCH_TLS_LD_PCREL20_S2); | |
4611 | break; | |
4612 | case R_LARCH_TLS_GD_PC_HI20: | |
4613 | rel_hi->r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel_hi->r_info), | |
4614 | R_LARCH_TLS_GD_PCREL20_S2); | |
4615 | break; | |
4616 | case R_LARCH_TLS_DESC_PC_HI20: | |
4617 | rel_hi->r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel_hi->r_info), | |
4618 | R_LARCH_TLS_DESC_PCREL20_S2); | |
4619 | break; | |
4620 | default: | |
4621 | break; | |
4622 | } | |
4623 | rel_lo->r_info = ELFNN_R_INFO (0, R_LARCH_NONE); | |
4624 | ||
4625 | loongarch_relax_delete_bytes (abfd, sec, rel_lo->r_offset, 4, info); | |
4626 | ||
4627 | return true; | |
4628 | } | |
4629 | ||
156a2edb | 4630 | /* Traverse all output sections and return the max alignment. */ |
4631 | ||
4632 | static bfd_vma | |
4633 | loongarch_get_max_alignment (asection *sec) | |
4634 | { | |
4635 | asection *o; | |
4636 | unsigned int max_alignment_power = 0; | |
4637 | ||
4638 | for (o = sec->output_section->owner->sections; o != NULL; o = o->next) | |
4639 | if (o->alignment_power > max_alignment_power) | |
4640 | max_alignment_power = o->alignment_power; | |
4641 | ||
4642 | return (bfd_vma) 1 << max_alignment_power; | |
4643 | } | |
4644 | ||
1b6fccd2 | 4645 | static bool |
4646 | loongarch_elf_relax_section (bfd *abfd, asection *sec, | |
4647 | struct bfd_link_info *info, | |
4648 | bool *again) | |
4649 | { | |
4650 | struct loongarch_elf_link_hash_table *htab = loongarch_elf_hash_table (info); | |
1b6fccd2 | 4651 | struct bfd_elf_section_data *data = elf_section_data (sec); |
c3d507ab | 4652 | Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (abfd); |
1b6fccd2 | 4653 | Elf_Internal_Rela *relocs; |
4654 | *again = false; | |
156a2edb | 4655 | bfd_vma max_alignment = 0; |
1b6fccd2 | 4656 | |
4657 | if (bfd_link_relocatable (info) | |
4658 | || sec->sec_flg0 | |
4659 | || (sec->flags & SEC_RELOC) == 0 | |
4660 | || sec->reloc_count == 0 | |
1b6fccd2 | 4661 | || (info->disable_target_specific_optimizations |
4662 | && info->relax_pass == 0) | |
4663 | /* The exp_seg_relro_adjust is enum phase_enum (0x4), | |
4664 | and defined in ld/ldexp.h. */ | |
4665 | || *(htab->data_segment_phase) == 4) | |
4666 | return true; | |
4667 | ||
4668 | if (data->relocs) | |
4669 | relocs = data->relocs; | |
4670 | else if (!(relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, | |
4671 | info->keep_memory))) | |
4672 | return true; | |
4673 | ||
4674 | if (!data->this_hdr.contents | |
4675 | && !bfd_malloc_and_get_section (abfd, sec, &data->this_hdr.contents)) | |
4676 | return true; | |
4677 | ||
4678 | if (symtab_hdr->sh_info != 0 | |
4679 | && !symtab_hdr->contents | |
4680 | && !(symtab_hdr->contents = | |
4681 | (unsigned char *) bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
4682 | symtab_hdr->sh_info, | |
4683 | 0, NULL, NULL, NULL))) | |
4684 | return true; | |
4685 | ||
c3d507ab | 4686 | data->relocs = relocs; |
1b6fccd2 | 4687 | |
156a2edb | 4688 | /* Estimate the maximum alignment for all output sections once time |
4689 | should be enough. */ | |
4690 | max_alignment = htab->max_alignment; | |
4691 | if (max_alignment == (bfd_vma) -1) | |
4692 | { | |
4693 | max_alignment = loongarch_get_max_alignment (sec); | |
4694 | htab->max_alignment = max_alignment; | |
4695 | } | |
4696 | ||
1b6fccd2 | 4697 | for (unsigned int i = 0; i < sec->reloc_count; i++) |
4698 | { | |
ae296cc4 | 4699 | char symtype; |
1b6fccd2 | 4700 | bfd_vma symval; |
ae296cc4 | 4701 | asection *sym_sec; |
1b6fccd2 | 4702 | bool local_got = false; |
ae296cc4 | 4703 | Elf_Internal_Rela *rel = relocs + i; |
1b6fccd2 | 4704 | struct elf_link_hash_entry *h = NULL; |
ae296cc4 | 4705 | unsigned long r_type = ELFNN_R_TYPE (rel->r_info); |
4706 | unsigned long r_symndx = ELFNN_R_SYM (rel->r_info); | |
1b6fccd2 | 4707 | |
ae296cc4 | 4708 | /* Four kind of relocations: |
4709 | Normal: symval is the symbol address. | |
4710 | R_LARCH_ALIGN: symval is the address of the last NOP instruction | |
4711 | added by this relocation, and then adds 4 more. | |
4712 | R_LARCH_CALL36: symval is the symbol address for local symbols, | |
4713 | or the PLT entry address of the symbol. (Todo) | |
4714 | R_LARCHL_TLS_LD/GD/DESC_PC_HI20: symval is the GOT entry address | |
0e45942b | 4715 | of the symbol if transition is not possible. */ |
1b6fccd2 | 4716 | if (r_symndx < symtab_hdr->sh_info) |
4717 | { | |
4718 | Elf_Internal_Sym *sym = (Elf_Internal_Sym *)symtab_hdr->contents | |
4719 | + r_symndx; | |
4720 | if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) | |
4721 | continue; | |
4722 | ||
0e45942b LC |
4723 | /* Only TLS instruction sequences that are accompanied by |
4724 | R_LARCH_RELAX and cannot perform type transition can be | |
4725 | relaxed. */ | |
ae296cc4 | 4726 | if (R_LARCH_TLS_LD_PC_HI20 == r_type |
4727 | || R_LARCH_TLS_GD_PC_HI20 == r_type | |
0e45942b LC |
4728 | || (R_LARCH_TLS_DESC_PC_HI20 == r_type |
4729 | && (i + 1 != sec->reloc_count) | |
4730 | && ELFNN_R_TYPE (rel[1].r_info) == R_LARCH_RELAX | |
4731 | && ! loongarch_can_trans_tls (abfd, info, h, | |
4732 | r_symndx, r_type))) | |
ae296cc4 | 4733 | { |
0e45942b LC |
4734 | sym_sec = htab->elf.sgot; |
4735 | symval = elf_local_got_offsets (abfd)[r_symndx]; | |
4736 | char tls_type = _bfd_loongarch_elf_tls_type (abfd, h, | |
4737 | r_symndx); | |
4738 | if (R_LARCH_TLS_DESC_PC_HI20 == r_type | |
4739 | && GOT_TLS_GD_BOTH_P (tls_type)) | |
4740 | symval += 2 * GOT_ENTRY_SIZE; | |
ae296cc4 | 4741 | } |
4742 | else if (sym->st_shndx == SHN_UNDEF || R_LARCH_ALIGN == r_type) | |
1b6fccd2 | 4743 | { |
4744 | sym_sec = sec; | |
4745 | symval = rel->r_offset; | |
4746 | } | |
4747 | else | |
4748 | { | |
4749 | sym_sec = elf_elfsections (abfd)[sym->st_shndx]->bfd_section; | |
4750 | symval = sym->st_value; | |
4751 | } | |
4752 | symtype = ELF_ST_TYPE (sym->st_info); | |
4753 | } | |
4754 | else | |
4755 | { | |
4756 | r_symndx = ELFNN_R_SYM (rel->r_info) - symtab_hdr->sh_info; | |
4757 | h = elf_sym_hashes (abfd)[r_symndx]; | |
4758 | ||
4759 | while (h->root.type == bfd_link_hash_indirect | |
4760 | || h->root.type == bfd_link_hash_warning) | |
4761 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
4762 | ||
4763 | /* Disable the relaxation for ifunc. */ | |
4764 | if (h != NULL && h->type == STT_GNU_IFUNC) | |
4765 | continue; | |
4766 | ||
ae296cc4 | 4767 | /* The GOT entry of tls symbols must in current execute file or |
4768 | shared object. */ | |
4769 | if (R_LARCH_TLS_LD_PC_HI20 == r_type | |
4770 | || R_LARCH_TLS_GD_PC_HI20 == r_type | |
0e45942b LC |
4771 | || (R_LARCH_TLS_DESC_PC_HI20 == r_type |
4772 | && (i + 1 != sec->reloc_count) | |
4773 | && ELFNN_R_TYPE (rel[1].r_info) == R_LARCH_RELAX | |
4774 | && !loongarch_can_trans_tls (abfd, info, h, | |
4775 | r_symndx, r_type))) | |
ae296cc4 | 4776 | { |
0e45942b LC |
4777 | sym_sec = htab->elf.sgot; |
4778 | symval = h->got.offset; | |
4779 | char tls_type = _bfd_loongarch_elf_tls_type (abfd, h, | |
4780 | r_symndx); | |
4781 | if (R_LARCH_TLS_DESC_PC_HI20 == r_type | |
4782 | && GOT_TLS_GD_BOTH_P (tls_type)) | |
4783 | symval += 2 * GOT_ENTRY_SIZE; | |
ae296cc4 | 4784 | } |
4785 | else if ((h->root.type == bfd_link_hash_defined | |
c3d507ab | 4786 | || h->root.type == bfd_link_hash_defweak) |
4787 | && h->root.u.def.section != NULL | |
4788 | && h->root.u.def.section->output_section != NULL) | |
1b6fccd2 | 4789 | { |
4790 | symval = h->root.u.def.value; | |
4791 | sym_sec = h->root.u.def.section; | |
4792 | } | |
4793 | else | |
4794 | continue; | |
4795 | ||
15aacf32 | 4796 | if (h && SYMBOL_REFERENCES_LOCAL (info, h)) |
1b6fccd2 | 4797 | local_got = true; |
4798 | symtype = h->type; | |
4799 | } | |
4800 | ||
4801 | if (sym_sec->sec_info_type == SEC_INFO_TYPE_MERGE | |
4802 | && (sym_sec->flags & SEC_MERGE)) | |
4803 | { | |
4804 | if (symtype == STT_SECTION) | |
4805 | symval += rel->r_addend; | |
4806 | ||
4807 | symval = _bfd_merged_section_offset (abfd, &sym_sec, | |
4808 | elf_section_data (sym_sec)->sec_info, | |
4809 | symval); | |
4810 | ||
4811 | if (symtype != STT_SECTION) | |
4812 | symval += rel->r_addend; | |
4813 | } | |
ae296cc4 | 4814 | /* For R_LARCH_ALIGN, symval is sec_addr (sec) + rel->r_offset |
c3d507ab | 4815 | + (alingmeng - 4). |
4816 | If r_symndx is 0, alignmeng-4 is r_addend. | |
4817 | If r_symndx > 0, alignment-4 is 2^(r_addend & 0xff)-4. */ | |
4818 | else if (R_LARCH_ALIGN == r_type) | |
4819 | if (r_symndx > 0) | |
4820 | symval += ((1 << (rel->r_addend & 0xff)) - 4); | |
4821 | else | |
4822 | symval += rel->r_addend; | |
1b6fccd2 | 4823 | else |
4824 | symval += rel->r_addend; | |
4825 | ||
4826 | symval += sec_addr (sym_sec); | |
4827 | ||
0e45942b LC |
4828 | /* If the conditions for tls type transition are met, type |
4829 | transition is performed instead of relax. | |
4830 | During the transition from DESC->IE/LE, there are 2 situations | |
4831 | depending on the different configurations of the relax/norelax | |
4832 | option. | |
4833 | If the -relax option is used, the extra nops will be removed, | |
4834 | and this transition is performed in pass 0. | |
4835 | If the --no-relax option is used, nop will be retained, and | |
4836 | this transition is performed in pass 1. */ | |
4837 | if (IS_LOONGARCH_TLS_TRANS_RELOC (r_type) | |
4838 | && (i + 1 != sec->reloc_count) | |
4839 | && ELFNN_R_TYPE (rel[1].r_info) == R_LARCH_RELAX | |
4840 | && loongarch_can_trans_tls (abfd, info, h, r_symndx, r_type)) | |
4841 | { | |
4842 | loongarch_tls_perform_trans (abfd, sec, rel, h, info); | |
4843 | r_type = ELFNN_R_TYPE (rel->r_info); | |
4844 | } | |
4845 | ||
c3d507ab | 4846 | switch (r_type) |
1b6fccd2 | 4847 | { |
4848 | case R_LARCH_ALIGN: | |
8338aecd | 4849 | if (1 == info->relax_pass) |
1b6fccd2 | 4850 | loongarch_relax_align (abfd, sec, sym_sec, info, rel, symval); |
4851 | break; | |
156a2edb | 4852 | |
1b6fccd2 | 4853 | case R_LARCH_DELETE: |
36317477 | 4854 | if (1 == info->relax_pass) |
1b6fccd2 | 4855 | { |
4856 | loongarch_relax_delete_bytes (abfd, sec, rel->r_offset, 4, info); | |
4857 | rel->r_info = ELFNN_R_INFO (0, R_LARCH_NONE); | |
4858 | } | |
4859 | break; | |
97ce7870 | 4860 | case R_LARCH_CALL36: |
4861 | if (0 == info->relax_pass && (i + 2) <= sec->reloc_count) | |
4862 | loongarch_relax_call36 (abfd, sec, rel, symval, info, again, | |
4863 | max_alignment); | |
4864 | break; | |
156a2edb | 4865 | |
aae8784c | 4866 | case R_LARCH_TLS_LE_HI20_R: |
4867 | case R_LARCH_TLS_LE_LO12_R: | |
4868 | case R_LARCH_TLS_LE_ADD_R: | |
0e45942b LC |
4869 | case R_LARCH_TLS_LE_HI20: |
4870 | case R_LARCH_TLS_LE_LO12: | |
4871 | case R_LARCH_TLS_LE64_LO20: | |
4872 | case R_LARCH_TLS_LE64_HI12: | |
aae8784c | 4873 | if (0 == info->relax_pass && (i + 2) <= sec->reloc_count) |
4874 | loongarch_relax_tls_le (abfd, sec, rel, info, symval); | |
4875 | break; | |
4876 | ||
1b6fccd2 | 4877 | case R_LARCH_PCALA_HI20: |
36317477 | 4878 | if (0 == info->relax_pass && (i + 4) <= sec->reloc_count) |
4f2469d0 | 4879 | loongarch_relax_pcala_addi (abfd, sec, sym_sec, rel, symval, |
156a2edb | 4880 | info, again, max_alignment); |
1b6fccd2 | 4881 | break; |
156a2edb | 4882 | |
1b6fccd2 | 4883 | case R_LARCH_GOT_PC_HI20: |
36317477 | 4884 | if (local_got && 0 == info->relax_pass |
4885 | && (i + 4) <= sec->reloc_count) | |
1b6fccd2 | 4886 | { |
1b6fccd2 | 4887 | if (loongarch_relax_pcala_ld (abfd, sec, rel)) |
4f2469d0 | 4888 | loongarch_relax_pcala_addi (abfd, sec, sym_sec, rel, symval, |
156a2edb | 4889 | info, again, max_alignment); |
1b6fccd2 | 4890 | } |
4891 | break; | |
ae296cc4 | 4892 | |
4893 | case R_LARCH_TLS_LD_PC_HI20: | |
ae296cc4 | 4894 | case R_LARCH_TLS_GD_PC_HI20: |
ae296cc4 | 4895 | case R_LARCH_TLS_DESC_PC_HI20: |
4896 | if (0 == info->relax_pass && (i + 4) <= sec->reloc_count) | |
4897 | loongarch_relax_tls_ld_gd_desc (abfd, sec, sym_sec, rel, symval, | |
156a2edb | 4898 | info, again, max_alignment); |
ae296cc4 | 4899 | break; |
4900 | ||
1b6fccd2 | 4901 | default: |
4902 | break; | |
4903 | } | |
4904 | } | |
4905 | ||
4906 | return true; | |
4907 | } | |
4908 | ||
e214f8db | 4909 | /* Finish up dynamic symbol handling. We set the contents of various |
4910 | dynamic sections here. */ | |
4911 | ||
4912 | static bool | |
4913 | loongarch_elf_finish_dynamic_symbol (bfd *output_bfd, | |
4914 | struct bfd_link_info *info, | |
4915 | struct elf_link_hash_entry *h, | |
4916 | Elf_Internal_Sym *sym) | |
4917 | { | |
4918 | struct loongarch_elf_link_hash_table *htab = loongarch_elf_hash_table (info); | |
4919 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); | |
e214f8db | 4920 | |
4921 | if (h->plt.offset != MINUS_ONE) | |
4922 | { | |
4923 | size_t i, plt_idx; | |
d218dba3 | 4924 | asection *plt, *gotplt, *relplt; |
e214f8db | 4925 | bfd_vma got_address; |
4926 | uint32_t plt_entry[PLT_ENTRY_INSNS]; | |
4927 | bfd_byte *loc; | |
4928 | Elf_Internal_Rela rela; | |
4929 | ||
e214f8db | 4930 | if (htab->elf.splt) |
4931 | { | |
4932 | BFD_ASSERT ((h->type == STT_GNU_IFUNC | |
4933 | && SYMBOL_REFERENCES_LOCAL (info, h)) | |
4934 | || h->dynindx != -1); | |
4935 | ||
4936 | plt = htab->elf.splt; | |
4937 | gotplt = htab->elf.sgotplt; | |
bc2a35c0 | 4938 | if (h->type == STT_GNU_IFUNC && SYMBOL_REFERENCES_LOCAL (info, h)) |
4939 | relplt = htab->elf.srelgot; | |
4940 | else | |
4941 | relplt = htab->elf.srelplt; | |
d218dba3 | 4942 | plt_idx = (h->plt.offset - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE; |
e214f8db | 4943 | got_address = |
4944 | sec_addr (gotplt) + GOTPLT_HEADER_SIZE + plt_idx * GOT_ENTRY_SIZE; | |
4945 | } | |
4946 | else /* if (htab->elf.iplt) */ | |
4947 | { | |
4948 | BFD_ASSERT (h->type == STT_GNU_IFUNC | |
4949 | && SYMBOL_REFERENCES_LOCAL (info, h)); | |
4950 | ||
4951 | plt = htab->elf.iplt; | |
4952 | gotplt = htab->elf.igotplt; | |
4953 | relplt = htab->elf.irelplt; | |
d218dba3 | 4954 | plt_idx = h->plt.offset / PLT_ENTRY_SIZE; |
e214f8db | 4955 | got_address = sec_addr (gotplt) + plt_idx * GOT_ENTRY_SIZE; |
4956 | } | |
4957 | ||
4958 | /* Find out where the .plt entry should go. */ | |
4959 | loc = plt->contents + h->plt.offset; | |
4960 | ||
4961 | /* Fill in the PLT entry itself. */ | |
4962 | if (!loongarch_make_plt_entry (got_address, | |
4963 | sec_addr (plt) + h->plt.offset, | |
4964 | plt_entry)) | |
4965 | return false; | |
4966 | ||
4967 | for (i = 0; i < PLT_ENTRY_INSNS; i++) | |
4968 | bfd_put_32 (output_bfd, plt_entry[i], loc + 4 * i); | |
4969 | ||
6d13722a | 4970 | /* Fill in the initial value of the got.plt entry. */ |
e214f8db | 4971 | loc = gotplt->contents + (got_address - sec_addr (gotplt)); |
4972 | bfd_put_NN (output_bfd, sec_addr (plt), loc); | |
4973 | ||
4974 | rela.r_offset = got_address; | |
d218dba3 | 4975 | |
bc2a35c0 | 4976 | /* TRUE if this is a PLT reference to a local IFUNC. */ |
4977 | if (PLT_LOCAL_IFUNC_P (info, h) | |
4978 | && (relplt == htab->elf.srelgot | |
4979 | || relplt == htab->elf.irelplt)) | |
4980 | { | |
ae2e4d40 XR |
4981 | rela.r_info = ELFNN_R_INFO (0, R_LARCH_IRELATIVE); |
4982 | rela.r_addend = (h->root.u.def.value | |
bc2a35c0 | 4983 | + h->root.u.def.section->output_section->vma |
4984 | + h->root.u.def.section->output_offset); | |
bc2a35c0 | 4985 | |
b5c37946 | 4986 | loongarch_elf_append_rela (output_bfd, relplt, &rela); |
bc2a35c0 | 4987 | } |
4988 | else | |
4989 | { | |
4990 | /* Fill in the entry in the rela.plt section. */ | |
4991 | rela.r_info = ELFNN_R_INFO (h->dynindx, R_LARCH_JUMP_SLOT); | |
4992 | rela.r_addend = 0; | |
4993 | loc = relplt->contents + plt_idx * sizeof (ElfNN_External_Rela); | |
4994 | bed->s->swap_reloca_out (output_bfd, &rela, loc); | |
4995 | } | |
e214f8db | 4996 | |
4997 | if (!h->def_regular) | |
4998 | { | |
4999 | /* Mark the symbol as undefined, rather than as defined in | |
5000 | the .plt section. Leave the value alone. */ | |
5001 | sym->st_shndx = SHN_UNDEF; | |
5002 | /* If the symbol is weak, we do need to clear the value. | |
5003 | Otherwise, the PLT entry would provide a definition for | |
5004 | the symbol even if the symbol wasn't defined anywhere, | |
5005 | and so the symbol would never be NULL. */ | |
5006 | if (!h->ref_regular_nonweak) | |
5007 | sym->st_value = 0; | |
5008 | } | |
5009 | } | |
5010 | ||
5011 | if (h->got.offset != MINUS_ONE | |
5012 | /* TLS got entry have been handled in elf_relocate_section. */ | |
4f248d61 LC |
5013 | && !(loongarch_elf_hash_entry (h)->tls_type |
5014 | & (GOT_TLS_GD | GOT_TLS_IE | GOT_TLS_GDESC)) | |
6d13722a | 5015 | /* Have allocated got entry but not allocated rela before. */ |
e214f8db | 5016 | && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) |
5017 | { | |
5018 | asection *sgot, *srela; | |
5019 | Elf_Internal_Rela rela; | |
6d13722a | 5020 | bfd_vma off = h->got.offset & ~(bfd_vma)1; |
e214f8db | 5021 | |
5022 | /* This symbol has an entry in the GOT. Set it up. */ | |
e214f8db | 5023 | sgot = htab->elf.sgot; |
5024 | srela = htab->elf.srelgot; | |
5025 | BFD_ASSERT (sgot && srela); | |
5026 | ||
5027 | rela.r_offset = sec_addr (sgot) + off; | |
5028 | ||
d218dba3 | 5029 | if (h->def_regular |
5030 | && h->type == STT_GNU_IFUNC) | |
e214f8db | 5031 | { |
d218dba3 | 5032 | if(h->plt.offset == MINUS_ONE) |
5033 | { | |
5034 | if (htab->elf.splt == NULL) | |
5035 | srela = htab->elf.irelplt; | |
5036 | ||
5037 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
5038 | { | |
5039 | asection *sec = h->root.u.def.section; | |
5040 | rela.r_info = ELFNN_R_INFO (0, R_LARCH_IRELATIVE); | |
5041 | rela.r_addend = h->root.u.def.value + sec->output_section->vma | |
5042 | + sec->output_offset; | |
5043 | bfd_put_NN (output_bfd, 0, sgot->contents + off); | |
5044 | } | |
5045 | else | |
5046 | { | |
d218dba3 | 5047 | BFD_ASSERT (h->dynindx != -1); |
5048 | rela.r_info = ELFNN_R_INFO (h->dynindx, R_LARCH_NN); | |
5049 | rela.r_addend = 0; | |
5050 | bfd_put_NN (output_bfd, (bfd_vma) 0, sgot->contents + off); | |
5051 | } | |
5052 | } | |
5053 | else if(bfd_link_pic (info)) | |
e214f8db | 5054 | { |
d218dba3 | 5055 | rela.r_info = ELFNN_R_INFO (h->dynindx, R_LARCH_NN); |
5056 | rela.r_addend = 0; | |
5057 | bfd_put_NN (output_bfd, rela.r_addend, sgot->contents + off); | |
e214f8db | 5058 | } |
5059 | else | |
5060 | { | |
d218dba3 | 5061 | asection *plt; |
5062 | /* For non-shared object, we can't use .got.plt, which | |
5063 | contains the real function address if we need pointer | |
5064 | equality. We load the GOT entry with the PLT entry. */ | |
5065 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; | |
5066 | bfd_put_NN (output_bfd, | |
5067 | (plt->output_section->vma | |
5068 | + plt->output_offset | |
5069 | + h->plt.offset), | |
5070 | sgot->contents + off); | |
5071 | return true; | |
e214f8db | 5072 | } |
5073 | } | |
5074 | else if (bfd_link_pic (info) && SYMBOL_REFERENCES_LOCAL (info, h)) | |
5075 | { | |
e214f8db | 5076 | asection *sec = h->root.u.def.section; |
5077 | rela.r_info = ELFNN_R_INFO (0, R_LARCH_RELATIVE); | |
5078 | rela.r_addend = (h->root.u.def.value + sec->output_section->vma | |
5079 | + sec->output_offset); | |
5080 | } | |
5081 | else | |
5082 | { | |
e214f8db | 5083 | BFD_ASSERT (h->dynindx != -1); |
5084 | rela.r_info = ELFNN_R_INFO (h->dynindx, R_LARCH_NN); | |
5085 | rela.r_addend = 0; | |
5086 | } | |
5087 | ||
5088 | loongarch_elf_append_rela (output_bfd, srela, &rela); | |
5089 | } | |
5090 | ||
e214f8db | 5091 | /* Mark some specially defined symbols as absolute. */ |
5092 | if (h == htab->elf.hdynamic || h == htab->elf.hgot || h == htab->elf.hplt) | |
5093 | sym->st_shndx = SHN_ABS; | |
5094 | ||
5095 | return true; | |
5096 | } | |
5097 | ||
5098 | /* Finish up the dynamic sections. */ | |
5099 | ||
5100 | static bool | |
5101 | loongarch_finish_dyn (bfd *output_bfd, struct bfd_link_info *info, bfd *dynobj, | |
5102 | asection *sdyn) | |
5103 | { | |
5104 | struct loongarch_elf_link_hash_table *htab = loongarch_elf_hash_table (info); | |
5105 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); | |
5106 | size_t dynsize = bed->s->sizeof_dyn, skipped_size = 0; | |
5107 | bfd_byte *dyncon, *dynconend; | |
5108 | ||
5109 | dynconend = sdyn->contents + sdyn->size; | |
5110 | for (dyncon = sdyn->contents; dyncon < dynconend; dyncon += dynsize) | |
5111 | { | |
5112 | Elf_Internal_Dyn dyn; | |
5113 | asection *s; | |
5114 | int skipped = 0; | |
5115 | ||
5116 | bed->s->swap_dyn_in (dynobj, dyncon, &dyn); | |
5117 | ||
5118 | switch (dyn.d_tag) | |
5119 | { | |
5120 | case DT_PLTGOT: | |
5121 | s = htab->elf.sgotplt; | |
5122 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; | |
5123 | break; | |
5124 | case DT_JMPREL: | |
5125 | s = htab->elf.srelplt; | |
5126 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; | |
5127 | break; | |
5128 | case DT_PLTRELSZ: | |
5129 | s = htab->elf.srelplt; | |
5130 | dyn.d_un.d_val = s->size; | |
5131 | break; | |
5132 | case DT_TEXTREL: | |
5133 | if ((info->flags & DF_TEXTREL) == 0) | |
5134 | skipped = 1; | |
5135 | break; | |
5136 | case DT_FLAGS: | |
5137 | if ((info->flags & DF_TEXTREL) == 0) | |
5138 | dyn.d_un.d_val &= ~DF_TEXTREL; | |
5139 | break; | |
5140 | } | |
5141 | if (skipped) | |
5142 | skipped_size += dynsize; | |
5143 | else | |
5144 | bed->s->swap_dyn_out (output_bfd, &dyn, dyncon - skipped_size); | |
5145 | } | |
5146 | /* Wipe out any trailing entries if we shifted down a dynamic tag. */ | |
5147 | memset (dyncon - skipped_size, 0, skipped_size); | |
5148 | return true; | |
5149 | } | |
5150 | ||
5151 | /* Finish up local dynamic symbol handling. We set the contents of | |
5152 | various dynamic sections here. */ | |
5153 | ||
b5c37946 | 5154 | static int |
e214f8db | 5155 | elfNN_loongarch_finish_local_dynamic_symbol (void **slot, void *inf) |
5156 | { | |
5157 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) *slot; | |
5158 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
5159 | ||
5160 | return loongarch_elf_finish_dynamic_symbol (info->output_bfd, info, h, NULL); | |
5161 | } | |
5162 | ||
b5c37946 SJ |
5163 | /* Value of struct elf_backend_data->elf_backend_output_arch_local_syms, |
5164 | this function is called before elf_link_sort_relocs. | |
5165 | So relocation R_LARCH_IRELATIVE for local ifunc can be append to | |
5166 | .rela.dyn (.rela.got) by loongarch_elf_append_rela. */ | |
5167 | ||
5168 | static bool | |
5169 | elf_loongarch_output_arch_local_syms | |
5170 | (bfd *output_bfd ATTRIBUTE_UNUSED, | |
5171 | struct bfd_link_info *info, | |
5172 | void *flaginfo ATTRIBUTE_UNUSED, | |
5173 | int (*func) (void *, const char *, | |
5174 | Elf_Internal_Sym *, | |
5175 | asection *, | |
5176 | struct elf_link_hash_entry *) ATTRIBUTE_UNUSED) | |
5177 | { | |
5178 | struct loongarch_elf_link_hash_table *htab = loongarch_elf_hash_table (info); | |
5179 | if (htab == NULL) | |
5180 | return false; | |
5181 | ||
5182 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ | |
5183 | htab_traverse (htab->loc_hash_table, | |
5184 | elfNN_loongarch_finish_local_dynamic_symbol, | |
5185 | info); | |
5186 | ||
5187 | return true; | |
5188 | } | |
5189 | ||
e214f8db | 5190 | static bool |
5191 | loongarch_elf_finish_dynamic_sections (bfd *output_bfd, | |
5192 | struct bfd_link_info *info) | |
5193 | { | |
5194 | bfd *dynobj; | |
5195 | asection *sdyn, *plt, *gotplt = NULL; | |
5196 | struct loongarch_elf_link_hash_table *htab; | |
5197 | ||
5198 | htab = loongarch_elf_hash_table (info); | |
5199 | BFD_ASSERT (htab); | |
5200 | dynobj = htab->elf.dynobj; | |
5201 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); | |
5202 | ||
5203 | if (elf_hash_table (info)->dynamic_sections_created) | |
5204 | { | |
5205 | BFD_ASSERT (htab->elf.splt && sdyn); | |
5206 | ||
5207 | if (!loongarch_finish_dyn (output_bfd, info, dynobj, sdyn)) | |
5208 | return false; | |
5209 | } | |
5210 | ||
d218dba3 | 5211 | plt = htab->elf.splt; |
5212 | gotplt = htab->elf.sgotplt; | |
e214f8db | 5213 | |
5214 | if (plt && 0 < plt->size) | |
5215 | { | |
5216 | size_t i; | |
5217 | uint32_t plt_header[PLT_HEADER_INSNS]; | |
5218 | if (!loongarch_make_plt_header (sec_addr (gotplt), sec_addr (plt), | |
5219 | plt_header)) | |
5220 | return false; | |
5221 | ||
5222 | for (i = 0; i < PLT_HEADER_INSNS; i++) | |
5223 | bfd_put_32 (output_bfd, plt_header[i], plt->contents + 4 * i); | |
5224 | ||
5225 | elf_section_data (plt->output_section)->this_hdr.sh_entsize = | |
5226 | PLT_ENTRY_SIZE; | |
5227 | } | |
5228 | ||
5229 | if (htab->elf.sgotplt) | |
5230 | { | |
5231 | asection *output_section = htab->elf.sgotplt->output_section; | |
5232 | ||
5233 | if (bfd_is_abs_section (output_section)) | |
5234 | { | |
5235 | _bfd_error_handler (_("discarded output section: `%pA'"), | |
5236 | htab->elf.sgotplt); | |
5237 | return false; | |
5238 | } | |
5239 | ||
5240 | if (0 < htab->elf.sgotplt->size) | |
5241 | { | |
5242 | /* Write the first two entries in .got.plt, needed for the dynamic | |
5243 | linker. */ | |
5244 | bfd_put_NN (output_bfd, MINUS_ONE, htab->elf.sgotplt->contents); | |
5245 | ||
5246 | bfd_put_NN (output_bfd, (bfd_vma) 0, | |
5247 | htab->elf.sgotplt->contents + GOT_ENTRY_SIZE); | |
5248 | } | |
5249 | ||
5250 | elf_section_data (output_section)->this_hdr.sh_entsize = GOT_ENTRY_SIZE; | |
5251 | } | |
5252 | ||
5253 | if (htab->elf.sgot) | |
5254 | { | |
5255 | asection *output_section = htab->elf.sgot->output_section; | |
5256 | ||
5257 | if (0 < htab->elf.sgot->size) | |
5258 | { | |
5259 | /* Set the first entry in the global offset table to the address of | |
5260 | the dynamic section. */ | |
5261 | bfd_vma val = sdyn ? sec_addr (sdyn) : 0; | |
5262 | bfd_put_NN (output_bfd, val, htab->elf.sgot->contents); | |
5263 | } | |
5264 | ||
5265 | elf_section_data (output_section)->this_hdr.sh_entsize = GOT_ENTRY_SIZE; | |
5266 | } | |
5267 | ||
e214f8db | 5268 | return true; |
5269 | } | |
5270 | ||
5271 | /* Return address for Ith PLT stub in section PLT, for relocation REL | |
5272 | or (bfd_vma) -1 if it should not be included. */ | |
5273 | ||
5274 | static bfd_vma | |
5275 | loongarch_elf_plt_sym_val (bfd_vma i, const asection *plt, | |
5276 | const arelent *rel ATTRIBUTE_UNUSED) | |
5277 | { | |
5278 | return plt->vma + PLT_HEADER_SIZE + i * PLT_ENTRY_SIZE; | |
5279 | } | |
5280 | ||
5281 | static enum elf_reloc_type_class | |
5282 | loongarch_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
5283 | const asection *rel_sec ATTRIBUTE_UNUSED, | |
5284 | const Elf_Internal_Rela *rela) | |
5285 | { | |
5286 | struct loongarch_elf_link_hash_table *htab; | |
5287 | htab = loongarch_elf_hash_table (info); | |
5288 | ||
5289 | if (htab->elf.dynsym != NULL && htab->elf.dynsym->contents != NULL) | |
5290 | { | |
5291 | /* Check relocation against STT_GNU_IFUNC symbol if there are | |
5292 | dynamic symbols. */ | |
5293 | bfd *abfd = info->output_bfd; | |
5294 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
5295 | unsigned long r_symndx = ELFNN_R_SYM (rela->r_info); | |
5296 | if (r_symndx != STN_UNDEF) | |
5297 | { | |
5298 | Elf_Internal_Sym sym; | |
5299 | if (!bed->s->swap_symbol_in (abfd, | |
5300 | htab->elf.dynsym->contents | |
5301 | + r_symndx * bed->s->sizeof_sym, | |
5302 | 0, &sym)) | |
5303 | { | |
5304 | /* xgettext:c-format */ | |
5305 | _bfd_error_handler (_("%pB symbol number %lu references" | |
5306 | " nonexistent SHT_SYMTAB_SHNDX section"), | |
5307 | abfd, r_symndx); | |
5308 | /* Ideally an error class should be returned here. */ | |
5309 | } | |
5310 | else if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) | |
5311 | return reloc_class_ifunc; | |
5312 | } | |
5313 | } | |
5314 | ||
5315 | switch (ELFNN_R_TYPE (rela->r_info)) | |
5316 | { | |
5317 | case R_LARCH_IRELATIVE: | |
5318 | return reloc_class_ifunc; | |
5319 | case R_LARCH_RELATIVE: | |
5320 | return reloc_class_relative; | |
5321 | case R_LARCH_JUMP_SLOT: | |
5322 | return reloc_class_plt; | |
5323 | case R_LARCH_COPY: | |
5324 | return reloc_class_copy; | |
5325 | default: | |
5326 | return reloc_class_normal; | |
5327 | } | |
5328 | } | |
5329 | ||
5330 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
5331 | ||
5332 | static void | |
5333 | loongarch_elf_copy_indirect_symbol (struct bfd_link_info *info, | |
5334 | struct elf_link_hash_entry *dir, | |
5335 | struct elf_link_hash_entry *ind) | |
5336 | { | |
d218dba3 | 5337 | struct elf_link_hash_entry *edir, *eind; |
e214f8db | 5338 | |
d218dba3 | 5339 | edir = dir; |
5340 | eind = ind; | |
e214f8db | 5341 | |
5342 | if (eind->dyn_relocs != NULL) | |
5343 | { | |
5344 | if (edir->dyn_relocs != NULL) | |
5345 | { | |
5346 | struct elf_dyn_relocs **pp; | |
5347 | struct elf_dyn_relocs *p; | |
5348 | ||
5349 | /* Add reloc counts against the indirect sym to the direct sym | |
5350 | list. Merge any entries against the same section. */ | |
5351 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL;) | |
5352 | { | |
5353 | struct elf_dyn_relocs *q; | |
5354 | ||
5355 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
5356 | if (q->sec == p->sec) | |
5357 | { | |
5358 | q->pc_count += p->pc_count; | |
5359 | q->count += p->count; | |
5360 | *pp = p->next; | |
5361 | break; | |
5362 | } | |
5363 | if (q == NULL) | |
5364 | pp = &p->next; | |
5365 | } | |
5366 | *pp = edir->dyn_relocs; | |
5367 | } | |
5368 | ||
5369 | edir->dyn_relocs = eind->dyn_relocs; | |
5370 | eind->dyn_relocs = NULL; | |
5371 | } | |
5372 | ||
5373 | if (ind->root.type == bfd_link_hash_indirect && dir->got.refcount < 0) | |
5374 | { | |
d218dba3 | 5375 | loongarch_elf_hash_entry(edir)->tls_type |
5376 | = loongarch_elf_hash_entry(eind)->tls_type; | |
5377 | loongarch_elf_hash_entry(eind)->tls_type = GOT_UNKNOWN; | |
e214f8db | 5378 | } |
5379 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); | |
5380 | } | |
5381 | ||
5382 | #define PRSTATUS_SIZE 0x1d8 | |
5383 | #define PRSTATUS_OFFSET_PR_CURSIG 0xc | |
5384 | #define PRSTATUS_OFFSET_PR_PID 0x20 | |
5385 | #define ELF_GREGSET_T_SIZE 0x168 | |
5386 | #define PRSTATUS_OFFSET_PR_REG 0x70 | |
5387 | ||
5388 | /* Support for core dump NOTE sections. */ | |
5389 | ||
5390 | static bool | |
5391 | loongarch_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) | |
5392 | { | |
5393 | switch (note->descsz) | |
5394 | { | |
5395 | default: | |
5396 | return false; | |
5397 | ||
5398 | /* The sizeof (struct elf_prstatus) on Linux/LoongArch. */ | |
5399 | case PRSTATUS_SIZE: | |
5400 | /* pr_cursig */ | |
5401 | elf_tdata (abfd)->core->signal = | |
5402 | bfd_get_16 (abfd, note->descdata + PRSTATUS_OFFSET_PR_CURSIG); | |
5403 | ||
5404 | /* pr_pid */ | |
5405 | elf_tdata (abfd)->core->lwpid = | |
5406 | bfd_get_32 (abfd, note->descdata + PRSTATUS_OFFSET_PR_PID); | |
5407 | break; | |
5408 | } | |
5409 | ||
5410 | /* Make a ".reg/999" section. */ | |
5411 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", ELF_GREGSET_T_SIZE, | |
5412 | note->descpos | |
5413 | + PRSTATUS_OFFSET_PR_REG); | |
5414 | } | |
5415 | ||
5416 | #define PRPSINFO_SIZE 0x88 | |
5417 | #define PRPSINFO_OFFSET_PR_PID 0x18 | |
5418 | #define PRPSINFO_OFFSET_PR_FNAME 0x28 | |
5419 | #define PRPSINFO_SIZEOF_PR_FNAME 0x10 | |
5420 | #define PRPSINFO_OFFSET_PR_PS_ARGS 0x38 | |
5421 | #define PRPSINFO_SIZEOF_PR_PS_ARGS 0x50 | |
5422 | ||
e214f8db | 5423 | static bool |
5424 | loongarch_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) | |
5425 | { | |
5426 | switch (note->descsz) | |
5427 | { | |
5428 | default: | |
5429 | return false; | |
5430 | ||
5431 | /* The sizeof (prpsinfo_t) on Linux/LoongArch. */ | |
5432 | case PRPSINFO_SIZE: | |
5433 | /* pr_pid */ | |
5434 | elf_tdata (abfd)->core->pid = | |
5435 | bfd_get_32 (abfd, note->descdata + PRPSINFO_OFFSET_PR_PID); | |
5436 | ||
5437 | /* pr_fname */ | |
5438 | elf_tdata (abfd)->core->program = | |
5439 | _bfd_elfcore_strndup (abfd, note->descdata + PRPSINFO_OFFSET_PR_FNAME, | |
5440 | PRPSINFO_SIZEOF_PR_FNAME); | |
5441 | ||
5442 | /* pr_psargs */ | |
5443 | elf_tdata (abfd)->core->command = | |
5444 | _bfd_elfcore_strndup (abfd, note->descdata + PRPSINFO_OFFSET_PR_PS_ARGS, | |
5445 | PRPSINFO_SIZEOF_PR_PS_ARGS); | |
5446 | break; | |
5447 | } | |
5448 | ||
5449 | /* Note that for some reason, a spurious space is tacked | |
5450 | onto the end of the args in some (at least one anyway) | |
5451 | implementations, so strip it off if it exists. */ | |
5452 | ||
5453 | { | |
5454 | char *command = elf_tdata (abfd)->core->command; | |
5455 | int n = strlen (command); | |
5456 | ||
5457 | if (0 < n && command[n - 1] == ' ') | |
5458 | command[n - 1] = '\0'; | |
5459 | } | |
5460 | ||
5461 | return true; | |
5462 | } | |
5463 | ||
5464 | /* Set the right mach type. */ | |
5465 | static bool | |
5466 | loongarch_elf_object_p (bfd *abfd) | |
5467 | { | |
5468 | /* There are only two mach types in LoongArch currently. */ | |
5469 | if (strcmp (abfd->xvec->name, "elf64-loongarch") == 0) | |
5470 | bfd_default_set_arch_mach (abfd, bfd_arch_loongarch, bfd_mach_loongarch64); | |
5471 | else | |
5472 | bfd_default_set_arch_mach (abfd, bfd_arch_loongarch, bfd_mach_loongarch32); | |
5473 | return true; | |
5474 | } | |
5475 | ||
5476 | static asection * | |
5477 | loongarch_elf_gc_mark_hook (asection *sec, struct bfd_link_info *info, | |
5478 | Elf_Internal_Rela *rel, | |
5479 | struct elf_link_hash_entry *h, | |
5480 | Elf_Internal_Sym *sym) | |
5481 | { | |
5482 | if (h != NULL) | |
5483 | switch (ELFNN_R_TYPE (rel->r_info)) | |
5484 | { | |
5485 | case R_LARCH_GNU_VTINHERIT: | |
5486 | case R_LARCH_GNU_VTENTRY: | |
5487 | return NULL; | |
5488 | } | |
5489 | ||
5490 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
5491 | } | |
5492 | ||
e6f601b7 | 5493 | /* Return TRUE if symbol H should be hashed in the `.gnu.hash' section. For |
5494 | executable PLT slots where the executable never takes the address of those | |
5495 | functions, the function symbols are not added to the hash table. */ | |
5496 | ||
5497 | static bool | |
5498 | elf_loongarch64_hash_symbol (struct elf_link_hash_entry *h) | |
5499 | { | |
5500 | if (h->plt.offset != (bfd_vma) -1 | |
5501 | && !h->def_regular | |
5502 | && !h->pointer_equality_needed) | |
5503 | return false; | |
5504 | ||
5505 | return _bfd_elf_hash_symbol (h); | |
5506 | } | |
5507 | ||
daeda141 | 5508 | /* If a relocation is rela_normal and the symbol associated with the |
5509 | relocation is STT_SECTION type, the addend of the relocation would add | |
5510 | sec->output_offset when partial linking (ld -r). | |
5511 | See elf_backend_data.rela_normal and elf_link_input_bfd(). | |
5512 | The addend of R_LARCH_ALIGN is used to represent the first and third | |
5513 | expression of .align, it should be a constant when linking. */ | |
5514 | ||
5515 | static bool | |
5516 | loongarch_elf_is_rela_normal (Elf_Internal_Rela *rel) | |
5517 | { | |
5518 | if (R_LARCH_ALIGN == ELFNN_R_TYPE (rel->r_info)) | |
5519 | return false; | |
5520 | return true; | |
5521 | } | |
5522 | ||
e214f8db | 5523 | #define TARGET_LITTLE_SYM loongarch_elfNN_vec |
5524 | #define TARGET_LITTLE_NAME "elfNN-loongarch" | |
5525 | #define ELF_ARCH bfd_arch_loongarch | |
5526 | #define ELF_TARGET_ID LARCH_ELF_DATA | |
5527 | #define ELF_MACHINE_CODE EM_LOONGARCH | |
5528 | #define ELF_MAXPAGESIZE 0x4000 | |
5529 | #define bfd_elfNN_bfd_reloc_type_lookup loongarch_reloc_type_lookup | |
5530 | #define bfd_elfNN_bfd_link_hash_table_create \ | |
5531 | loongarch_elf_link_hash_table_create | |
5532 | #define bfd_elfNN_bfd_reloc_name_lookup loongarch_reloc_name_lookup | |
5533 | #define elf_info_to_howto_rel NULL /* Fall through to elf_info_to_howto. */ | |
5534 | #define elf_info_to_howto loongarch_info_to_howto_rela | |
5535 | #define bfd_elfNN_bfd_merge_private_bfd_data \ | |
5536 | elfNN_loongarch_merge_private_bfd_data | |
5537 | ||
5538 | #define elf_backend_reloc_type_class loongarch_reloc_type_class | |
5539 | #define elf_backend_copy_indirect_symbol loongarch_elf_copy_indirect_symbol | |
5540 | #define elf_backend_create_dynamic_sections \ | |
5541 | loongarch_elf_create_dynamic_sections | |
5542 | #define elf_backend_check_relocs loongarch_elf_check_relocs | |
5543 | #define elf_backend_adjust_dynamic_symbol loongarch_elf_adjust_dynamic_symbol | |
af969b14 | 5544 | #define elf_backend_late_size_sections loongarch_elf_late_size_sections |
e214f8db | 5545 | #define elf_backend_relocate_section loongarch_elf_relocate_section |
5546 | #define elf_backend_finish_dynamic_symbol loongarch_elf_finish_dynamic_symbol | |
b5c37946 SJ |
5547 | #define elf_backend_output_arch_local_syms \ |
5548 | elf_loongarch_output_arch_local_syms | |
e214f8db | 5549 | #define elf_backend_finish_dynamic_sections \ |
5550 | loongarch_elf_finish_dynamic_sections | |
5551 | #define elf_backend_object_p loongarch_elf_object_p | |
5552 | #define elf_backend_gc_mark_hook loongarch_elf_gc_mark_hook | |
5553 | #define elf_backend_plt_sym_val loongarch_elf_plt_sym_val | |
5554 | #define elf_backend_grok_prstatus loongarch_elf_grok_prstatus | |
5555 | #define elf_backend_grok_psinfo loongarch_elf_grok_psinfo | |
e6f601b7 | 5556 | #define elf_backend_hash_symbol elf_loongarch64_hash_symbol |
1b6fccd2 | 5557 | #define bfd_elfNN_bfd_relax_section loongarch_elf_relax_section |
daeda141 | 5558 | #define elf_backend_is_rela_normal loongarch_elf_is_rela_normal |
e214f8db | 5559 | |
3233ad1e | 5560 | #define elf_backend_dtrel_excludes_plt 1 |
5561 | ||
e214f8db | 5562 | #include "elfNN-target.h" |