]>
Commit | Line | Data |
---|---|---|
e23eba97 | 1 | /* RISC-V-specific support for NN-bit ELF. |
fd67aa11 | 2 | Copyright (C) 2011-2024 Free Software Foundation, Inc. |
e23eba97 NC |
3 | |
4 | Contributed by Andrew Waterman (andrew@sifive.com). | |
5 | Based on TILE-Gx and MIPS targets. | |
6 | ||
7 | This file is part of BFD, the Binary File Descriptor library. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 3 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program; see the file COPYING3. If not, | |
21 | see <http://www.gnu.org/licenses/>. */ | |
22 | ||
23 | /* This file handles RISC-V ELF targets. */ | |
24 | ||
25 | #include "sysdep.h" | |
26 | #include "bfd.h" | |
27 | #include "libbfd.h" | |
28 | #include "bfdlink.h" | |
29 | #include "genlink.h" | |
30 | #include "elf-bfd.h" | |
31 | #include "elfxx-riscv.h" | |
32 | #include "elf/riscv.h" | |
33 | #include "opcode/riscv.h" | |
02dd9d25 | 34 | #include "objalloc.h" |
e23eba97 | 35 | |
fbc09e7a | 36 | #include <limits.h> |
fbc09e7a MC |
37 | #ifndef CHAR_BIT |
38 | #define CHAR_BIT 8 | |
39 | #endif | |
40 | ||
23068b02 NC |
41 | /* True if dynamic relocation is needed. If we are creating a shared library, |
42 | and this is a reloc against a global symbol, or a non PC relative reloc | |
43 | against a local symbol, then we need to copy the reloc into the shared | |
44 | library. However, if we are linking with -Bsymbolic, we do not need to | |
45 | copy a reloc against a global symbol which is defined in an object we are | |
46 | including in the link (i.e., DEF_REGULAR is set). | |
47 | ||
48 | At this point we have not seen all the input files, so it is possible that | |
49 | DEF_REGULAR is not set now but will be set later (it is never cleared). | |
50 | In case of a weak definition, DEF_REGULAR may be cleared later by a strong | |
51 | definition in a shared library. We account for that possibility below by | |
52 | storing information in the relocs_copied field of the hash table entry. | |
53 | A similar situation occurs when creating shared libraries and symbol | |
54 | visibility changes render the symbol local. | |
55 | ||
56 | If on the other hand, we are creating an executable, we may need to keep | |
57 | relocations for symbols satisfied by a dynamic library if we manage to | |
58 | avoid copy relocs for the symbol. | |
59 | ||
60 | Generate dynamic pointer relocation against STT_GNU_IFUNC symbol in the | |
61 | non-code section (R_RISCV_32/R_RISCV_64). */ | |
62 | #define RISCV_NEED_DYNAMIC_RELOC(PCREL, INFO, H, SEC) \ | |
63 | ((bfd_link_pic (INFO) \ | |
64 | && ((SEC)->flags & SEC_ALLOC) != 0 \ | |
65 | && (!(PCREL) \ | |
66 | || ((H) != NULL \ | |
67 | && (!(INFO)->symbolic \ | |
68 | || (H)->root.type == bfd_link_hash_defweak \ | |
69 | || !(H)->def_regular)))) \ | |
70 | || (!bfd_link_pic (INFO) \ | |
71 | && ((SEC)->flags & SEC_ALLOC) != 0 \ | |
72 | && (H) != NULL \ | |
73 | && ((H)->root.type == bfd_link_hash_defweak \ | |
74 | || !(H)->def_regular)) \ | |
75 | || (!bfd_link_pic (INFO) \ | |
76 | && (H) != NULL \ | |
77 | && (H)->type == STT_GNU_IFUNC \ | |
78 | && ((SEC)->flags & SEC_CODE) == 0)) | |
79 | ||
80 | /* True if dynamic relocation should be generated. */ | |
81 | #define RISCV_GENERATE_DYNAMIC_RELOC(PCREL, INFO, H, RESOLVED_TO_ZERO) \ | |
82 | ((bfd_link_pic (INFO) \ | |
83 | && ((H) == NULL \ | |
84 | || (ELF_ST_VISIBILITY ((H)->other) == STV_DEFAULT && !(RESOLVED_TO_ZERO)) \ | |
85 | || (H)->root.type != bfd_link_hash_undefweak) \ | |
86 | && (!(PCREL) \ | |
87 | || !SYMBOL_CALLS_LOCAL ((INFO), (H)))) \ | |
88 | || (!bfd_link_pic (INFO) \ | |
89 | && (H) != NULL \ | |
90 | && (H)->dynindx != -1 \ | |
91 | && !(H)->non_got_ref \ | |
92 | && (((H)->def_dynamic && !(H)->def_regular) \ | |
93 | || (H)->root.type == bfd_link_hash_undefweak \ | |
94 | || (H)->root.type == bfd_link_hash_undefined))) | |
95 | ||
96 | /* True if this input relocation should be copied to output. H->dynindx | |
97 | may be -1 if this symbol was marked to become local. */ | |
98 | #define RISCV_COPY_INPUT_RELOC(INFO, H) \ | |
99 | ((H) != NULL \ | |
100 | && (H)->dynindx != -1 \ | |
101 | && (!bfd_link_pic (INFO) \ | |
102 | || !SYMBOLIC_BIND ((INFO), (H)) \ | |
103 | || !(H)->def_regular)) | |
104 | ||
105 | /* True if this is actually a static link, or it is a -Bsymbolic link | |
106 | and the symbol is defined locally, or the symbol was forced to be | |
107 | local because of a version file. */ | |
108 | #define RISCV_RESOLVED_LOCALLY(INFO, H) \ | |
109 | (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (elf_hash_table (INFO)->dynamic_sections_created, \ | |
110 | bfd_link_pic (INFO), (H)) \ | |
111 | || (bfd_link_pic (INFO) \ | |
112 | && SYMBOL_REFERENCES_LOCAL ((INFO), (H)))) | |
113 | ||
20ef84ed NC |
114 | /* Set NEED_RELOC to true if TLS GD/IE needs dynamic relocations, and INDX will |
115 | be the dynamic index. PR22263, use the same check in allocate_dynrelocs and | |
116 | riscv_elf_relocate_section for TLS GD/IE. */ | |
117 | #define RISCV_TLS_GD_IE_NEED_DYN_RELOC(INFO, DYN, H, INDX, NEED_RELOC) \ | |
118 | do \ | |
119 | { \ | |
120 | if ((H) != NULL \ | |
121 | && (H)->dynindx != -1 \ | |
122 | && WILL_CALL_FINISH_DYNAMIC_SYMBOL ((DYN), bfd_link_pic (INFO), (H)) \ | |
123 | && (bfd_link_dll (INFO) || !SYMBOL_REFERENCES_LOCAL ((INFO), (H)))) \ | |
124 | (INDX) = (H)->dynindx; \ | |
125 | if ((bfd_link_dll (INFO) || (INDX) != 0) \ | |
126 | && ((H) == NULL \ | |
127 | || ELF_ST_VISIBILITY ((H)->other) == STV_DEFAULT \ | |
128 | || (H)->root.type != bfd_link_hash_undefweak)) \ | |
129 | (NEED_RELOC) = true; \ | |
130 | } \ | |
131 | while (0) | |
132 | ||
e23eba97 NC |
133 | #define ARCH_SIZE NN |
134 | ||
135 | #define MINUS_ONE ((bfd_vma)0 - 1) | |
136 | ||
137 | #define RISCV_ELF_LOG_WORD_BYTES (ARCH_SIZE == 32 ? 2 : 3) | |
138 | ||
139 | #define RISCV_ELF_WORD_BYTES (1 << RISCV_ELF_LOG_WORD_BYTES) | |
140 | ||
141 | /* The name of the dynamic interpreter. This is put in the .interp | |
142 | section. */ | |
143 | ||
144 | #define ELF64_DYNAMIC_INTERPRETER "/lib/ld.so.1" | |
145 | #define ELF32_DYNAMIC_INTERPRETER "/lib32/ld.so.1" | |
146 | ||
147 | #define ELF_ARCH bfd_arch_riscv | |
148 | #define ELF_TARGET_ID RISCV_ELF_DATA | |
149 | #define ELF_MACHINE_CODE EM_RISCV | |
150 | #define ELF_MAXPAGESIZE 0x1000 | |
151 | #define ELF_COMMONPAGESIZE 0x1000 | |
152 | ||
fbc95f1e KC |
153 | #define RISCV_ATTRIBUTES_SECTION_NAME ".riscv.attributes" |
154 | ||
e23eba97 NC |
155 | /* RISC-V ELF linker hash entry. */ |
156 | ||
157 | struct riscv_elf_link_hash_entry | |
158 | { | |
159 | struct elf_link_hash_entry elf; | |
160 | ||
1942a048 NC |
161 | #define GOT_UNKNOWN 0 |
162 | #define GOT_NORMAL 1 | |
163 | #define GOT_TLS_GD 2 | |
164 | #define GOT_TLS_IE 4 | |
165 | #define GOT_TLS_LE 8 | |
e23eba97 NC |
166 | char tls_type; |
167 | }; | |
168 | ||
169 | #define riscv_elf_hash_entry(ent) \ | |
1942a048 | 170 | ((struct riscv_elf_link_hash_entry *) (ent)) |
e23eba97 NC |
171 | |
172 | struct _bfd_riscv_elf_obj_tdata | |
173 | { | |
174 | struct elf_obj_tdata root; | |
175 | ||
176 | /* tls_type for each local got entry. */ | |
177 | char *local_got_tls_type; | |
178 | }; | |
179 | ||
180 | #define _bfd_riscv_elf_tdata(abfd) \ | |
181 | ((struct _bfd_riscv_elf_obj_tdata *) (abfd)->tdata.any) | |
182 | ||
183 | #define _bfd_riscv_elf_local_got_tls_type(abfd) \ | |
184 | (_bfd_riscv_elf_tdata (abfd)->local_got_tls_type) | |
185 | ||
186 | #define _bfd_riscv_elf_tls_type(abfd, h, symndx) \ | |
187 | (*((h) != NULL ? &riscv_elf_hash_entry (h)->tls_type \ | |
188 | : &_bfd_riscv_elf_local_got_tls_type (abfd) [symndx])) | |
189 | ||
190 | #define is_riscv_elf(bfd) \ | |
191 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
192 | && elf_tdata (bfd) != NULL \ | |
193 | && elf_object_id (bfd) == RISCV_ELF_DATA) | |
194 | ||
0a1b45a2 | 195 | static bool |
fc46e8bd NC |
196 | elfNN_riscv_mkobject (bfd *abfd) |
197 | { | |
198 | return bfd_elf_allocate_object (abfd, | |
199 | sizeof (struct _bfd_riscv_elf_obj_tdata), | |
200 | RISCV_ELF_DATA); | |
201 | } | |
202 | ||
e23eba97 NC |
203 | #include "elf/common.h" |
204 | #include "elf/internal.h" | |
205 | ||
206 | struct riscv_elf_link_hash_table | |
207 | { | |
208 | struct elf_link_hash_table elf; | |
209 | ||
50980ba3 FS |
210 | /* Various options and other info passed from the linker. */ |
211 | struct riscv_elf_params *params; | |
212 | ||
e23eba97 | 213 | /* Short-cuts to get to dynamic linker sections. */ |
e23eba97 NC |
214 | asection *sdyntdata; |
215 | ||
fc3c5343 L |
216 | /* The max alignment of output sections. */ |
217 | bfd_vma max_alignment; | |
02dd9d25 | 218 | |
0699f2d7 LX |
219 | /* The max alignment of output sections in [gp-2K, gp+2K) range. */ |
220 | bfd_vma max_alignment_for_gp; | |
221 | ||
02dd9d25 NC |
222 | /* Used by local STT_GNU_IFUNC symbols. */ |
223 | htab_t loc_hash_table; | |
224 | void * loc_hash_memory; | |
51a8a7c2 NC |
225 | |
226 | /* The index of the last unused .rel.iplt slot. */ | |
227 | bfd_vma last_iplt_index; | |
ebdcad3f | 228 | |
ef9d2565 NC |
229 | /* The data segment phase, don't relax the section |
230 | when it is exp_seg_relro_adjust. */ | |
231 | int *data_segment_phase; | |
8155b853 NC |
232 | |
233 | /* Relocations for variant CC symbols may be present. */ | |
234 | int variant_cc; | |
e23eba97 NC |
235 | }; |
236 | ||
fbc09e7a | 237 | /* Instruction access functions. */ |
fbc09e7a MC |
238 | #define riscv_get_insn(bits, ptr) \ |
239 | ((bits) == 16 ? bfd_getl16 (ptr) \ | |
240 | : (bits) == 32 ? bfd_getl32 (ptr) \ | |
241 | : (bits) == 64 ? bfd_getl64 (ptr) \ | |
242 | : (abort (), (bfd_vma) - 1)) | |
243 | #define riscv_put_insn(bits, val, ptr) \ | |
244 | ((bits) == 16 ? bfd_putl16 (val, ptr) \ | |
245 | : (bits) == 32 ? bfd_putl32 (val, ptr) \ | |
246 | : (bits) == 64 ? bfd_putl64 (val, ptr) \ | |
247 | : (abort (), (void) 0)) | |
e23eba97 NC |
248 | |
249 | /* Get the RISC-V ELF linker hash table from a link_info structure. */ | |
250 | #define riscv_elf_hash_table(p) \ | |
0f55320b AM |
251 | ((is_elf_hash_table ((p)->hash) \ |
252 | && elf_hash_table_id (elf_hash_table (p)) == RISCV_ELF_DATA) \ | |
253 | ? (struct riscv_elf_link_hash_table *) (p)->hash : NULL) | |
e23eba97 | 254 | |
50980ba3 FS |
255 | void |
256 | riscv_elfNN_set_options (struct bfd_link_info *link_info, | |
257 | struct riscv_elf_params *params) | |
258 | { | |
259 | riscv_elf_hash_table (link_info)->params = params; | |
260 | } | |
261 | ||
0a1b45a2 | 262 | static bool |
0aa13fee | 263 | riscv_info_to_howto_rela (bfd *abfd, |
e23eba97 NC |
264 | arelent *cache_ptr, |
265 | Elf_Internal_Rela *dst) | |
266 | { | |
0aa13fee | 267 | cache_ptr->howto = riscv_elf_rtype_to_howto (abfd, ELFNN_R_TYPE (dst->r_info)); |
f3185997 | 268 | return cache_ptr->howto != NULL; |
e23eba97 NC |
269 | } |
270 | ||
271 | static void | |
272 | riscv_elf_append_rela (bfd *abfd, asection *s, Elf_Internal_Rela *rel) | |
273 | { | |
274 | const struct elf_backend_data *bed; | |
275 | bfd_byte *loc; | |
276 | ||
277 | bed = get_elf_backend_data (abfd); | |
278 | loc = s->contents + (s->reloc_count++ * bed->s->sizeof_rela); | |
279 | bed->s->swap_reloca_out (abfd, rel, loc); | |
280 | } | |
281 | ||
fbc09e7a MC |
282 | /* Return true if a relocation is modifying an instruction. */ |
283 | ||
0a1b45a2 | 284 | static bool |
fbc09e7a MC |
285 | riscv_is_insn_reloc (const reloc_howto_type *howto) |
286 | { | |
287 | /* Heuristic: A multibyte destination with a nontrivial mask | |
288 | is an instruction */ | |
289 | return (howto->bitsize > 8 | |
290 | && howto->dst_mask != 0 | |
291 | && ~(howto->dst_mask | (howto->bitsize < sizeof(bfd_vma) * CHAR_BIT | |
292 | ? (MINUS_ONE << howto->bitsize) : (bfd_vma)0)) != 0); | |
293 | } | |
294 | ||
e23eba97 | 295 | /* PLT/GOT stuff. */ |
e23eba97 NC |
296 | #define PLT_HEADER_INSNS 8 |
297 | #define PLT_ENTRY_INSNS 4 | |
298 | #define PLT_HEADER_SIZE (PLT_HEADER_INSNS * 4) | |
299 | #define PLT_ENTRY_SIZE (PLT_ENTRY_INSNS * 4) | |
e23eba97 | 300 | #define GOT_ENTRY_SIZE RISCV_ELF_WORD_BYTES |
e0f747d5 TI |
301 | #define TLS_GD_GOT_ENTRY_SIZE (RISCV_ELF_WORD_BYTES * 2) |
302 | #define TLS_IE_GOT_ENTRY_SIZE RISCV_ELF_WORD_BYTES | |
02dd9d25 NC |
303 | /* Reserve two entries of GOTPLT for ld.so, one is used for PLT resolver, |
304 | the other is used for link map. Other targets also reserve one more | |
305 | entry used for runtime profile? */ | |
e23eba97 NC |
306 | #define GOTPLT_HEADER_SIZE (2 * GOT_ENTRY_SIZE) |
307 | ||
308 | #define sec_addr(sec) ((sec)->output_section->vma + (sec)->output_offset) | |
309 | ||
e23eba97 NC |
310 | #if ARCH_SIZE == 32 |
311 | # define MATCH_LREG MATCH_LW | |
312 | #else | |
313 | # define MATCH_LREG MATCH_LD | |
314 | #endif | |
315 | ||
316 | /* Generate a PLT header. */ | |
317 | ||
0a1b45a2 | 318 | static bool |
5ef23793 JW |
319 | riscv_make_plt_header (bfd *output_bfd, bfd_vma gotplt_addr, bfd_vma addr, |
320 | uint32_t *entry) | |
e23eba97 NC |
321 | { |
322 | bfd_vma gotplt_offset_high = RISCV_PCREL_HIGH_PART (gotplt_addr, addr); | |
323 | bfd_vma gotplt_offset_low = RISCV_PCREL_LOW_PART (gotplt_addr, addr); | |
324 | ||
5ef23793 JW |
325 | /* RVE has no t3 register, so this won't work, and is not supported. */ |
326 | if (elf_elfheader (output_bfd)->e_flags & EF_RISCV_RVE) | |
327 | { | |
328 | _bfd_error_handler (_("%pB: warning: RVE PLT generation not supported"), | |
329 | output_bfd); | |
0a1b45a2 | 330 | return false; |
5ef23793 JW |
331 | } |
332 | ||
e23eba97 | 333 | /* auipc t2, %hi(.got.plt) |
07d6d2b8 | 334 | sub t1, t1, t3 # shifted .got.plt offset + hdr size + 12 |
e23eba97 NC |
335 | l[w|d] t3, %lo(.got.plt)(t2) # _dl_runtime_resolve |
336 | addi t1, t1, -(hdr size + 12) # shifted .got.plt offset | |
337 | addi t0, t2, %lo(.got.plt) # &.got.plt | |
338 | srli t1, t1, log2(16/PTRSIZE) # .got.plt offset | |
07d6d2b8 | 339 | l[w|d] t0, PTRSIZE(t0) # link map |
dcd709e0 | 340 | jr t3 */ |
e23eba97 NC |
341 | |
342 | entry[0] = RISCV_UTYPE (AUIPC, X_T2, gotplt_offset_high); | |
343 | entry[1] = RISCV_RTYPE (SUB, X_T1, X_T1, X_T3); | |
344 | entry[2] = RISCV_ITYPE (LREG, X_T3, X_T2, gotplt_offset_low); | |
1174d920 | 345 | entry[3] = RISCV_ITYPE (ADDI, X_T1, X_T1, (uint32_t) -(PLT_HEADER_SIZE + 12)); |
e23eba97 NC |
346 | entry[4] = RISCV_ITYPE (ADDI, X_T0, X_T2, gotplt_offset_low); |
347 | entry[5] = RISCV_ITYPE (SRLI, X_T1, X_T1, 4 - RISCV_ELF_LOG_WORD_BYTES); | |
348 | entry[6] = RISCV_ITYPE (LREG, X_T0, X_T0, RISCV_ELF_WORD_BYTES); | |
349 | entry[7] = RISCV_ITYPE (JALR, 0, X_T3, 0); | |
5ef23793 | 350 | |
0a1b45a2 | 351 | return true; |
e23eba97 NC |
352 | } |
353 | ||
354 | /* Generate a PLT entry. */ | |
355 | ||
0a1b45a2 | 356 | static bool |
5ef23793 JW |
357 | riscv_make_plt_entry (bfd *output_bfd, bfd_vma got, bfd_vma addr, |
358 | uint32_t *entry) | |
e23eba97 | 359 | { |
5ef23793 JW |
360 | /* RVE has no t3 register, so this won't work, and is not supported. */ |
361 | if (elf_elfheader (output_bfd)->e_flags & EF_RISCV_RVE) | |
362 | { | |
363 | _bfd_error_handler (_("%pB: warning: RVE PLT generation not supported"), | |
364 | output_bfd); | |
0a1b45a2 | 365 | return false; |
5ef23793 JW |
366 | } |
367 | ||
e23eba97 NC |
368 | /* auipc t3, %hi(.got.plt entry) |
369 | l[w|d] t3, %lo(.got.plt entry)(t3) | |
370 | jalr t1, t3 | |
dcd709e0 | 371 | nop */ |
e23eba97 NC |
372 | |
373 | entry[0] = RISCV_UTYPE (AUIPC, X_T3, RISCV_PCREL_HIGH_PART (got, addr)); | |
1d65abb5 | 374 | entry[1] = RISCV_ITYPE (LREG, X_T3, X_T3, RISCV_PCREL_LOW_PART (got, addr)); |
e23eba97 NC |
375 | entry[2] = RISCV_ITYPE (JALR, X_T1, X_T3, 0); |
376 | entry[3] = RISCV_NOP; | |
5ef23793 | 377 | |
0a1b45a2 | 378 | return true; |
e23eba97 NC |
379 | } |
380 | ||
381 | /* Create an entry in an RISC-V ELF linker hash table. */ | |
382 | ||
383 | static struct bfd_hash_entry * | |
384 | link_hash_newfunc (struct bfd_hash_entry *entry, | |
385 | struct bfd_hash_table *table, const char *string) | |
386 | { | |
387 | /* Allocate the structure if it has not already been allocated by a | |
388 | subclass. */ | |
389 | if (entry == NULL) | |
390 | { | |
391 | entry = | |
392 | bfd_hash_allocate (table, | |
393 | sizeof (struct riscv_elf_link_hash_entry)); | |
394 | if (entry == NULL) | |
395 | return entry; | |
396 | } | |
397 | ||
398 | /* Call the allocation method of the superclass. */ | |
399 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); | |
400 | if (entry != NULL) | |
401 | { | |
402 | struct riscv_elf_link_hash_entry *eh; | |
403 | ||
404 | eh = (struct riscv_elf_link_hash_entry *) entry; | |
e23eba97 NC |
405 | eh->tls_type = GOT_UNKNOWN; |
406 | } | |
407 | ||
408 | return entry; | |
409 | } | |
410 | ||
02dd9d25 | 411 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry |
dcd709e0 NC |
412 | for local symbol so that we can handle local STT_GNU_IFUNC symbols |
413 | as global symbol. We reuse indx and dynstr_index for local symbol | |
414 | hash since they aren't used by global symbols in this backend. */ | |
02dd9d25 NC |
415 | |
416 | static hashval_t | |
417 | riscv_elf_local_htab_hash (const void *ptr) | |
418 | { | |
419 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) ptr; | |
420 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); | |
421 | } | |
422 | ||
423 | /* Compare local hash entries. */ | |
424 | ||
425 | static int | |
426 | riscv_elf_local_htab_eq (const void *ptr1, const void *ptr2) | |
427 | { | |
428 | struct elf_link_hash_entry *h1 = (struct elf_link_hash_entry *) ptr1; | |
429 | struct elf_link_hash_entry *h2 = (struct elf_link_hash_entry *) ptr2; | |
430 | ||
431 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
432 | } | |
433 | ||
434 | /* Find and/or create a hash entry for local symbol. */ | |
435 | ||
436 | static struct elf_link_hash_entry * | |
437 | riscv_elf_get_local_sym_hash (struct riscv_elf_link_hash_table *htab, | |
438 | bfd *abfd, const Elf_Internal_Rela *rel, | |
0a1b45a2 | 439 | bool create) |
02dd9d25 NC |
440 | { |
441 | struct riscv_elf_link_hash_entry eh, *ret; | |
442 | asection *sec = abfd->sections; | |
443 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, | |
444 | ELFNN_R_SYM (rel->r_info)); | |
445 | void **slot; | |
446 | ||
447 | eh.elf.indx = sec->id; | |
448 | eh.elf.dynstr_index = ELFNN_R_SYM (rel->r_info); | |
449 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &eh, h, | |
450 | create ? INSERT : NO_INSERT); | |
451 | ||
452 | if (!slot) | |
453 | return NULL; | |
454 | ||
455 | if (*slot) | |
456 | { | |
457 | ret = (struct riscv_elf_link_hash_entry *) *slot; | |
458 | return &ret->elf; | |
459 | } | |
460 | ||
461 | ret = (struct riscv_elf_link_hash_entry *) | |
462 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, | |
463 | sizeof (struct riscv_elf_link_hash_entry)); | |
464 | if (ret) | |
465 | { | |
466 | memset (ret, 0, sizeof (*ret)); | |
467 | ret->elf.indx = sec->id; | |
468 | ret->elf.dynstr_index = ELFNN_R_SYM (rel->r_info); | |
469 | ret->elf.dynindx = -1; | |
470 | *slot = ret; | |
471 | } | |
472 | return &ret->elf; | |
473 | } | |
474 | ||
475 | /* Destroy a RISC-V elf linker hash table. */ | |
476 | ||
477 | static void | |
478 | riscv_elf_link_hash_table_free (bfd *obfd) | |
479 | { | |
480 | struct riscv_elf_link_hash_table *ret | |
481 | = (struct riscv_elf_link_hash_table *) obfd->link.hash; | |
482 | ||
483 | if (ret->loc_hash_table) | |
484 | htab_delete (ret->loc_hash_table); | |
485 | if (ret->loc_hash_memory) | |
486 | objalloc_free ((struct objalloc *) ret->loc_hash_memory); | |
487 | ||
488 | _bfd_elf_link_hash_table_free (obfd); | |
489 | } | |
490 | ||
e23eba97 NC |
491 | /* Create a RISC-V ELF linker hash table. */ |
492 | ||
493 | static struct bfd_link_hash_table * | |
494 | riscv_elf_link_hash_table_create (bfd *abfd) | |
495 | { | |
496 | struct riscv_elf_link_hash_table *ret; | |
986f0783 | 497 | size_t amt = sizeof (struct riscv_elf_link_hash_table); |
e23eba97 NC |
498 | |
499 | ret = (struct riscv_elf_link_hash_table *) bfd_zmalloc (amt); | |
500 | if (ret == NULL) | |
501 | return NULL; | |
502 | ||
503 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc, | |
504 | sizeof (struct riscv_elf_link_hash_entry), | |
505 | RISCV_ELF_DATA)) | |
506 | { | |
507 | free (ret); | |
508 | return NULL; | |
509 | } | |
510 | ||
fc3c5343 | 511 | ret->max_alignment = (bfd_vma) -1; |
0699f2d7 | 512 | ret->max_alignment_for_gp = (bfd_vma) -1; |
02dd9d25 NC |
513 | |
514 | /* Create hash table for local ifunc. */ | |
515 | ret->loc_hash_table = htab_try_create (1024, | |
516 | riscv_elf_local_htab_hash, | |
517 | riscv_elf_local_htab_eq, | |
518 | NULL); | |
519 | ret->loc_hash_memory = objalloc_create (); | |
520 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
521 | { | |
522 | riscv_elf_link_hash_table_free (abfd); | |
523 | return NULL; | |
524 | } | |
525 | ret->elf.root.hash_table_free = riscv_elf_link_hash_table_free; | |
526 | ||
e23eba97 NC |
527 | return &ret->elf.root; |
528 | } | |
529 | ||
530 | /* Create the .got section. */ | |
531 | ||
0a1b45a2 | 532 | static bool |
e23eba97 NC |
533 | riscv_elf_create_got_section (bfd *abfd, struct bfd_link_info *info) |
534 | { | |
535 | flagword flags; | |
536 | asection *s, *s_got; | |
537 | struct elf_link_hash_entry *h; | |
538 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
539 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
540 | ||
541 | /* This function may be called more than once. */ | |
ce558b89 | 542 | if (htab->sgot != NULL) |
0a1b45a2 | 543 | return true; |
e23eba97 NC |
544 | |
545 | flags = bed->dynamic_sec_flags; | |
546 | ||
547 | s = bfd_make_section_anyway_with_flags (abfd, | |
548 | (bed->rela_plts_and_copies_p | |
549 | ? ".rela.got" : ".rel.got"), | |
550 | (bed->dynamic_sec_flags | |
551 | | SEC_READONLY)); | |
552 | if (s == NULL | |
fd361982 | 553 | || !bfd_set_section_alignment (s, bed->s->log_file_align)) |
0a1b45a2 | 554 | return false; |
e23eba97 NC |
555 | htab->srelgot = s; |
556 | ||
557 | s = s_got = bfd_make_section_anyway_with_flags (abfd, ".got", flags); | |
558 | if (s == NULL | |
fd361982 | 559 | || !bfd_set_section_alignment (s, bed->s->log_file_align)) |
0a1b45a2 | 560 | return false; |
e23eba97 NC |
561 | htab->sgot = s; |
562 | ||
563 | /* The first bit of the global offset table is the header. */ | |
564 | s->size += bed->got_header_size; | |
565 | ||
566 | if (bed->want_got_plt) | |
567 | { | |
568 | s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags); | |
569 | if (s == NULL | |
fd361982 | 570 | || !bfd_set_section_alignment (s, bed->s->log_file_align)) |
0a1b45a2 | 571 | return false; |
e23eba97 NC |
572 | htab->sgotplt = s; |
573 | ||
574 | /* Reserve room for the header. */ | |
575 | s->size += GOTPLT_HEADER_SIZE; | |
576 | } | |
577 | ||
578 | if (bed->want_got_sym) | |
579 | { | |
580 | /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got | |
581 | section. We don't do this in the linker script because we don't want | |
582 | to define the symbol if we are not creating a global offset | |
583 | table. */ | |
584 | h = _bfd_elf_define_linkage_sym (abfd, info, s_got, | |
585 | "_GLOBAL_OFFSET_TABLE_"); | |
586 | elf_hash_table (info)->hgot = h; | |
587 | if (h == NULL) | |
0a1b45a2 | 588 | return false; |
e23eba97 NC |
589 | } |
590 | ||
0a1b45a2 | 591 | return true; |
e23eba97 NC |
592 | } |
593 | ||
594 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and | |
595 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
596 | hash table. */ | |
597 | ||
0a1b45a2 | 598 | static bool |
e23eba97 NC |
599 | riscv_elf_create_dynamic_sections (bfd *dynobj, |
600 | struct bfd_link_info *info) | |
601 | { | |
602 | struct riscv_elf_link_hash_table *htab; | |
603 | ||
604 | htab = riscv_elf_hash_table (info); | |
605 | BFD_ASSERT (htab != NULL); | |
606 | ||
607 | if (!riscv_elf_create_got_section (dynobj, info)) | |
0a1b45a2 | 608 | return false; |
e23eba97 NC |
609 | |
610 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) | |
0a1b45a2 | 611 | return false; |
e23eba97 | 612 | |
e23eba97 NC |
613 | if (!bfd_link_pic (info)) |
614 | { | |
3e7bd7f2 JW |
615 | /* Technically, this section doesn't have contents. It is used as the |
616 | target of TLS copy relocs, to copy TLS data from shared libraries into | |
617 | the executable. However, if we don't mark it as loadable, then it | |
618 | matches the IS_TBSS test in ldlang.c, and there is no run-time address | |
619 | space allocated for it even though it has SEC_ALLOC. That test is | |
620 | correct for .tbss, but not correct for this section. There is also | |
621 | a second problem that having a section with no contents can only work | |
622 | if it comes after all sections with contents in the same segment, | |
623 | but the linker script does not guarantee that. This is just mixed in | |
624 | with other .tdata.* sections. We can fix both problems by lying and | |
625 | saying that there are contents. This section is expected to be small | |
626 | so this should not cause a significant extra program startup cost. */ | |
e23eba97 NC |
627 | htab->sdyntdata = |
628 | bfd_make_section_anyway_with_flags (dynobj, ".tdata.dyn", | |
13755f40 | 629 | (SEC_ALLOC | SEC_THREAD_LOCAL |
3e7bd7f2 JW |
630 | | SEC_LOAD | SEC_DATA |
631 | | SEC_HAS_CONTENTS | |
13755f40 | 632 | | SEC_LINKER_CREATED)); |
e23eba97 NC |
633 | } |
634 | ||
9d19e4fd AM |
635 | if (!htab->elf.splt || !htab->elf.srelplt || !htab->elf.sdynbss |
636 | || (!bfd_link_pic (info) && (!htab->elf.srelbss || !htab->sdyntdata))) | |
e23eba97 NC |
637 | abort (); |
638 | ||
0a1b45a2 | 639 | return true; |
e23eba97 NC |
640 | } |
641 | ||
642 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
643 | ||
644 | static void | |
645 | riscv_elf_copy_indirect_symbol (struct bfd_link_info *info, | |
646 | struct elf_link_hash_entry *dir, | |
647 | struct elf_link_hash_entry *ind) | |
648 | { | |
649 | struct riscv_elf_link_hash_entry *edir, *eind; | |
650 | ||
651 | edir = (struct riscv_elf_link_hash_entry *) dir; | |
652 | eind = (struct riscv_elf_link_hash_entry *) ind; | |
653 | ||
e23eba97 NC |
654 | if (ind->root.type == bfd_link_hash_indirect |
655 | && dir->got.refcount <= 0) | |
656 | { | |
657 | edir->tls_type = eind->tls_type; | |
658 | eind->tls_type = GOT_UNKNOWN; | |
659 | } | |
660 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); | |
661 | } | |
662 | ||
0a1b45a2 | 663 | static bool |
e23eba97 NC |
664 | riscv_elf_record_tls_type (bfd *abfd, struct elf_link_hash_entry *h, |
665 | unsigned long symndx, char tls_type) | |
666 | { | |
667 | char *new_tls_type = &_bfd_riscv_elf_tls_type (abfd, h, symndx); | |
668 | ||
669 | *new_tls_type |= tls_type; | |
670 | if ((*new_tls_type & GOT_NORMAL) && (*new_tls_type & ~GOT_NORMAL)) | |
671 | { | |
672 | (*_bfd_error_handler) | |
871b3ab2 | 673 | (_("%pB: `%s' accessed both as normal and thread local symbol"), |
e23eba97 | 674 | abfd, h ? h->root.root.string : "<local>"); |
0a1b45a2 | 675 | return false; |
e23eba97 | 676 | } |
0a1b45a2 | 677 | return true; |
e23eba97 NC |
678 | } |
679 | ||
0a1b45a2 | 680 | static bool |
e23eba97 NC |
681 | riscv_elf_record_got_reference (bfd *abfd, struct bfd_link_info *info, |
682 | struct elf_link_hash_entry *h, long symndx) | |
683 | { | |
684 | struct riscv_elf_link_hash_table *htab = riscv_elf_hash_table (info); | |
685 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
686 | ||
687 | if (htab->elf.sgot == NULL) | |
688 | { | |
689 | if (!riscv_elf_create_got_section (htab->elf.dynobj, info)) | |
0a1b45a2 | 690 | return false; |
e23eba97 NC |
691 | } |
692 | ||
693 | if (h != NULL) | |
694 | { | |
695 | h->got.refcount += 1; | |
0a1b45a2 | 696 | return true; |
e23eba97 NC |
697 | } |
698 | ||
699 | /* This is a global offset table entry for a local symbol. */ | |
700 | if (elf_local_got_refcounts (abfd) == NULL) | |
701 | { | |
702 | bfd_size_type size = symtab_hdr->sh_info * (sizeof (bfd_vma) + 1); | |
703 | if (!(elf_local_got_refcounts (abfd) = bfd_zalloc (abfd, size))) | |
0a1b45a2 | 704 | return false; |
e23eba97 NC |
705 | _bfd_riscv_elf_local_got_tls_type (abfd) |
706 | = (char *) (elf_local_got_refcounts (abfd) + symtab_hdr->sh_info); | |
707 | } | |
708 | elf_local_got_refcounts (abfd) [symndx] += 1; | |
709 | ||
0a1b45a2 | 710 | return true; |
e23eba97 NC |
711 | } |
712 | ||
0a1b45a2 | 713 | static bool |
e23eba97 NC |
714 | bad_static_reloc (bfd *abfd, unsigned r_type, struct elf_link_hash_entry *h) |
715 | { | |
f3185997 NC |
716 | reloc_howto_type * r = riscv_elf_rtype_to_howto (abfd, r_type); |
717 | ||
02dd9d25 NC |
718 | /* We propably can improve the information to tell users that they |
719 | should be recompile the code with -fPIC or -fPIE, just like what | |
720 | x86 does. */ | |
e23eba97 | 721 | (*_bfd_error_handler) |
871b3ab2 | 722 | (_("%pB: relocation %s against `%s' can not be used when making a shared " |
e23eba97 | 723 | "object; recompile with -fPIC"), |
f3185997 NC |
724 | abfd, r ? r->name : _("<unknown>"), |
725 | h != NULL ? h->root.root.string : "a local symbol"); | |
e23eba97 | 726 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 727 | return false; |
e23eba97 | 728 | } |
dcd709e0 | 729 | |
e23eba97 NC |
730 | /* Look through the relocs for a section during the first phase, and |
731 | allocate space in the global offset table or procedure linkage | |
732 | table. */ | |
733 | ||
0a1b45a2 | 734 | static bool |
e23eba97 NC |
735 | riscv_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, |
736 | asection *sec, const Elf_Internal_Rela *relocs) | |
737 | { | |
738 | struct riscv_elf_link_hash_table *htab; | |
739 | Elf_Internal_Shdr *symtab_hdr; | |
740 | struct elf_link_hash_entry **sym_hashes; | |
741 | const Elf_Internal_Rela *rel; | |
742 | asection *sreloc = NULL; | |
743 | ||
744 | if (bfd_link_relocatable (info)) | |
0a1b45a2 | 745 | return true; |
e23eba97 NC |
746 | |
747 | htab = riscv_elf_hash_table (info); | |
748 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
749 | sym_hashes = elf_sym_hashes (abfd); | |
750 | ||
751 | if (htab->elf.dynobj == NULL) | |
752 | htab->elf.dynobj = abfd; | |
753 | ||
754 | for (rel = relocs; rel < relocs + sec->reloc_count; rel++) | |
755 | { | |
756 | unsigned int r_type; | |
d42c267e | 757 | unsigned int r_symndx; |
e23eba97 | 758 | struct elf_link_hash_entry *h; |
b679fb48 | 759 | bool is_abs_symbol = false; |
e23eba97 NC |
760 | |
761 | r_symndx = ELFNN_R_SYM (rel->r_info); | |
762 | r_type = ELFNN_R_TYPE (rel->r_info); | |
763 | ||
764 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
765 | { | |
871b3ab2 | 766 | (*_bfd_error_handler) (_("%pB: bad symbol index: %d"), |
e23eba97 | 767 | abfd, r_symndx); |
0a1b45a2 | 768 | return false; |
e23eba97 NC |
769 | } |
770 | ||
771 | if (r_symndx < symtab_hdr->sh_info) | |
02dd9d25 NC |
772 | { |
773 | /* A local symbol. */ | |
774 | Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, | |
775 | abfd, r_symndx); | |
776 | if (isym == NULL) | |
0a1b45a2 | 777 | return false; |
02dd9d25 | 778 | |
b679fb48 NC |
779 | is_abs_symbol = isym->st_shndx == SHN_ABS ? true : false; |
780 | ||
02dd9d25 NC |
781 | /* Check relocation against local STT_GNU_IFUNC symbol. */ |
782 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) | |
783 | { | |
0a1b45a2 | 784 | h = riscv_elf_get_local_sym_hash (htab, abfd, rel, true); |
02dd9d25 | 785 | if (h == NULL) |
0a1b45a2 | 786 | return false; |
02dd9d25 NC |
787 | |
788 | /* Fake STT_GNU_IFUNC global symbol. */ | |
789 | h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr, | |
790 | isym, NULL); | |
791 | h->type = STT_GNU_IFUNC; | |
792 | h->def_regular = 1; | |
793 | h->ref_regular = 1; | |
794 | h->forced_local = 1; | |
795 | h->root.type = bfd_link_hash_defined; | |
796 | } | |
797 | else | |
798 | h = NULL; | |
799 | } | |
e23eba97 NC |
800 | else |
801 | { | |
802 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
803 | while (h->root.type == bfd_link_hash_indirect | |
804 | || h->root.type == bfd_link_hash_warning) | |
805 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
b679fb48 NC |
806 | |
807 | is_abs_symbol = bfd_is_abs_symbol (&h->root) ? true : false; | |
e23eba97 NC |
808 | } |
809 | ||
02dd9d25 NC |
810 | if (h != NULL) |
811 | { | |
812 | switch (r_type) | |
813 | { | |
814 | case R_RISCV_32: | |
815 | case R_RISCV_64: | |
816 | case R_RISCV_CALL: | |
817 | case R_RISCV_CALL_PLT: | |
818 | case R_RISCV_HI20: | |
819 | case R_RISCV_GOT_HI20: | |
820 | case R_RISCV_PCREL_HI20: | |
821 | /* Create the ifunc sections, iplt and ipltgot, for static | |
822 | executables. */ | |
823 | if (h->type == STT_GNU_IFUNC | |
824 | && !_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info)) | |
0a1b45a2 | 825 | return false; |
02dd9d25 NC |
826 | break; |
827 | ||
828 | default: | |
829 | break; | |
830 | } | |
831 | ||
832 | /* It is referenced by a non-shared object. */ | |
833 | h->ref_regular = 1; | |
834 | } | |
835 | ||
e23eba97 NC |
836 | switch (r_type) |
837 | { | |
838 | case R_RISCV_TLS_GD_HI20: | |
839 | if (!riscv_elf_record_got_reference (abfd, info, h, r_symndx) | |
840 | || !riscv_elf_record_tls_type (abfd, h, r_symndx, GOT_TLS_GD)) | |
0a1b45a2 | 841 | return false; |
e23eba97 NC |
842 | break; |
843 | ||
844 | case R_RISCV_TLS_GOT_HI20: | |
225df051 | 845 | if (bfd_link_dll (info)) |
e23eba97 NC |
846 | info->flags |= DF_STATIC_TLS; |
847 | if (!riscv_elf_record_got_reference (abfd, info, h, r_symndx) | |
848 | || !riscv_elf_record_tls_type (abfd, h, r_symndx, GOT_TLS_IE)) | |
0a1b45a2 | 849 | return false; |
e23eba97 NC |
850 | break; |
851 | ||
852 | case R_RISCV_GOT_HI20: | |
853 | if (!riscv_elf_record_got_reference (abfd, info, h, r_symndx) | |
854 | || !riscv_elf_record_tls_type (abfd, h, r_symndx, GOT_NORMAL)) | |
0a1b45a2 | 855 | return false; |
e23eba97 NC |
856 | break; |
857 | ||
3b1450b3 | 858 | case R_RISCV_CALL: |
e23eba97 | 859 | case R_RISCV_CALL_PLT: |
dcd709e0 NC |
860 | /* These symbol requires a procedure linkage table entry. |
861 | We actually build the entry in adjust_dynamic_symbol, | |
3b1450b3 | 862 | because these might be a case of linking PIC code without |
e23eba97 NC |
863 | linking in any dynamic objects, in which case we don't |
864 | need to generate a procedure linkage table after all. */ | |
865 | ||
3b1450b3 NC |
866 | /* If it is a local symbol, then we resolve it directly |
867 | without creating a PLT entry. */ | |
868 | if (h == NULL) | |
869 | continue; | |
870 | ||
871 | h->needs_plt = 1; | |
872 | h->plt.refcount += 1; | |
e23eba97 NC |
873 | break; |
874 | ||
02dd9d25 NC |
875 | case R_RISCV_PCREL_HI20: |
876 | if (h != NULL | |
877 | && h->type == STT_GNU_IFUNC) | |
878 | { | |
879 | h->non_got_ref = 1; | |
880 | h->pointer_equality_needed = 1; | |
881 | ||
882 | /* We don't use the PCREL_HI20 in the data section, | |
883 | so we always need the plt when it refers to | |
884 | ifunc symbol. */ | |
885 | h->plt.refcount += 1; | |
886 | } | |
890744e8 PD |
887 | |
888 | /* The non-preemptible absolute symbol shouldn't be referneced with | |
889 | pc-relative relocation when generating shared object. However, | |
890 | PCREL_HI20/LO12 relocs are always bind locally when generating | |
891 | shared object, so all absolute symbol referenced need to be | |
892 | disallowed, except they are defined in linker script. | |
893 | ||
894 | Maybe we should add this check for all pc-relative relocations, | |
895 | please see pr28789 and pr25749 for details. */ | |
896 | if (bfd_link_pic (info) | |
897 | /* (h == NULL || SYMBOL_REFERENCES_LOCAL (info, h)) */ | |
898 | && is_abs_symbol) | |
899 | { | |
900 | if (h != NULL && (h)->root.ldscript_def) | |
901 | /* Disallow the absolute symbol defined in linker script here | |
902 | will cause the glibc-linux toolchain build failed, so regard | |
903 | them as pc-relative symbols, just like what x86 did. */ | |
904 | ; | |
905 | else | |
906 | { | |
907 | const char *name; | |
908 | if (h->root.root.string) | |
909 | name = h->root.root.string; | |
910 | else | |
911 | { | |
912 | Elf_Internal_Sym *sym; | |
913 | sym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, abfd, | |
914 | r_symndx); | |
915 | name = bfd_elf_sym_name (abfd, symtab_hdr, sym, NULL); | |
916 | } | |
917 | ||
918 | reloc_howto_type *r_t = | |
919 | riscv_elf_rtype_to_howto (abfd, r_type); | |
920 | _bfd_error_handler | |
921 | (_("%pB: relocation %s against absolute symbol `%s' can " | |
922 | "not be used when making a shared object"), | |
923 | abfd, r_t ? r_t->name : _("<unknown>"), name); | |
924 | bfd_set_error (bfd_error_bad_value); | |
925 | return false; | |
926 | } | |
927 | } | |
02dd9d25 NC |
928 | /* Fall through. */ |
929 | ||
e23eba97 NC |
930 | case R_RISCV_JAL: |
931 | case R_RISCV_BRANCH: | |
932 | case R_RISCV_RVC_BRANCH: | |
933 | case R_RISCV_RVC_JUMP: | |
02dd9d25 NC |
934 | /* In shared libraries and pie, these relocs are known |
935 | to bind locally. */ | |
e23eba97 NC |
936 | if (bfd_link_pic (info)) |
937 | break; | |
938 | goto static_reloc; | |
939 | ||
940 | case R_RISCV_TPREL_HI20: | |
225df051 | 941 | /* This is not allowed in the pic, but okay in pie. */ |
e23eba97 NC |
942 | if (!bfd_link_executable (info)) |
943 | return bad_static_reloc (abfd, r_type, h); | |
944 | if (h != NULL) | |
945 | riscv_elf_record_tls_type (abfd, h, r_symndx, GOT_TLS_LE); | |
225df051 | 946 | break; |
e23eba97 NC |
947 | |
948 | case R_RISCV_HI20: | |
949 | if (bfd_link_pic (info)) | |
950 | return bad_static_reloc (abfd, r_type, h); | |
b679fb48 NC |
951 | goto static_reloc; |
952 | ||
953 | case R_RISCV_32: | |
954 | if (ARCH_SIZE > 32 | |
955 | && bfd_link_pic (info) | |
956 | && (sec->flags & SEC_ALLOC) != 0) | |
957 | { | |
958 | if (is_abs_symbol) | |
959 | break; | |
960 | ||
961 | reloc_howto_type *r_t = riscv_elf_rtype_to_howto (abfd, r_type); | |
962 | _bfd_error_handler | |
963 | (_("%pB: relocation %s against non-absolute symbol `%s' can " | |
964 | "not be used in RVNN when making a shared object"), | |
965 | abfd, r_t ? r_t->name : _("<unknown>"), | |
966 | h != NULL ? h->root.root.string : "a local symbol"); | |
967 | bfd_set_error (bfd_error_bad_value); | |
968 | return false; | |
969 | } | |
970 | goto static_reloc; | |
e23eba97 NC |
971 | |
972 | case R_RISCV_COPY: | |
973 | case R_RISCV_JUMP_SLOT: | |
974 | case R_RISCV_RELATIVE: | |
975 | case R_RISCV_64: | |
e23eba97 NC |
976 | /* Fall through. */ |
977 | ||
978 | static_reloc: | |
e23eba97 | 979 | |
02dd9d25 NC |
980 | if (h != NULL |
981 | && (!bfd_link_pic (info) | |
982 | || h->type == STT_GNU_IFUNC)) | |
e23eba97 | 983 | { |
02dd9d25 NC |
984 | /* This reloc might not bind locally. */ |
985 | h->non_got_ref = 1; | |
986 | h->pointer_equality_needed = 1; | |
987 | ||
988 | if (!h->def_regular | |
989 | || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0) | |
990 | { | |
991 | /* We may need a .plt entry if the symbol is a function | |
992 | defined in a shared lib or is a function referenced | |
993 | from the code or read-only section. */ | |
994 | h->plt.refcount += 1; | |
995 | } | |
e23eba97 NC |
996 | } |
997 | ||
23068b02 NC |
998 | reloc_howto_type *r = riscv_elf_rtype_to_howto (abfd, r_type); |
999 | if (RISCV_NEED_DYNAMIC_RELOC (r->pc_relative, info, h, sec)) | |
e23eba97 | 1000 | { |
3bf083ed AM |
1001 | struct elf_dyn_relocs *p; |
1002 | struct elf_dyn_relocs **head; | |
e23eba97 NC |
1003 | |
1004 | /* When creating a shared object, we must copy these | |
1005 | relocs into the output file. We create a reloc | |
1006 | section in dynobj and make room for the reloc. */ | |
1007 | if (sreloc == NULL) | |
1008 | { | |
1009 | sreloc = _bfd_elf_make_dynamic_reloc_section | |
1010 | (sec, htab->elf.dynobj, RISCV_ELF_LOG_WORD_BYTES, | |
0a1b45a2 | 1011 | abfd, /*rela?*/ true); |
e23eba97 NC |
1012 | |
1013 | if (sreloc == NULL) | |
0a1b45a2 | 1014 | return false; |
e23eba97 NC |
1015 | } |
1016 | ||
1017 | /* If this is a global symbol, we count the number of | |
1018 | relocations we need for this symbol. */ | |
1019 | if (h != NULL) | |
190eb1dd | 1020 | head = &h->dyn_relocs; |
e23eba97 NC |
1021 | else |
1022 | { | |
1023 | /* Track dynamic relocs needed for local syms too. | |
1024 | We really need local syms available to do this | |
1025 | easily. Oh well. */ | |
1026 | ||
1027 | asection *s; | |
1028 | void *vpp; | |
1029 | Elf_Internal_Sym *isym; | |
1030 | ||
f1dfbfdb | 1031 | isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, |
e23eba97 NC |
1032 | abfd, r_symndx); |
1033 | if (isym == NULL) | |
0a1b45a2 | 1034 | return false; |
e23eba97 NC |
1035 | |
1036 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
1037 | if (s == NULL) | |
1038 | s = sec; | |
1039 | ||
1040 | vpp = &elf_section_data (s)->local_dynrel; | |
3bf083ed | 1041 | head = (struct elf_dyn_relocs **) vpp; |
e23eba97 NC |
1042 | } |
1043 | ||
1044 | p = *head; | |
1045 | if (p == NULL || p->sec != sec) | |
1046 | { | |
986f0783 | 1047 | size_t amt = sizeof *p; |
3bf083ed | 1048 | p = ((struct elf_dyn_relocs *) |
e23eba97 NC |
1049 | bfd_alloc (htab->elf.dynobj, amt)); |
1050 | if (p == NULL) | |
0a1b45a2 | 1051 | return false; |
e23eba97 NC |
1052 | p->next = *head; |
1053 | *head = p; | |
1054 | p->sec = sec; | |
1055 | p->count = 0; | |
1056 | p->pc_count = 0; | |
1057 | } | |
1058 | ||
1059 | p->count += 1; | |
f3185997 | 1060 | p->pc_count += r == NULL ? 0 : r->pc_relative; |
e23eba97 NC |
1061 | } |
1062 | ||
1063 | break; | |
1064 | ||
e23eba97 NC |
1065 | default: |
1066 | break; | |
1067 | } | |
1068 | } | |
1069 | ||
0a1b45a2 | 1070 | return true; |
e23eba97 NC |
1071 | } |
1072 | ||
e23eba97 NC |
1073 | /* Adjust a symbol defined by a dynamic object and referenced by a |
1074 | regular object. The current definition is in some section of the | |
1075 | dynamic object, but we're not including those sections. We have to | |
1076 | change the definition to something the rest of the link can | |
1077 | understand. */ | |
1078 | ||
0a1b45a2 | 1079 | static bool |
e23eba97 NC |
1080 | riscv_elf_adjust_dynamic_symbol (struct bfd_link_info *info, |
1081 | struct elf_link_hash_entry *h) | |
1082 | { | |
1083 | struct riscv_elf_link_hash_table *htab; | |
1084 | struct riscv_elf_link_hash_entry * eh; | |
e23eba97 | 1085 | bfd *dynobj; |
5474d94f | 1086 | asection *s, *srel; |
e23eba97 NC |
1087 | |
1088 | htab = riscv_elf_hash_table (info); | |
1089 | BFD_ASSERT (htab != NULL); | |
1090 | ||
1091 | dynobj = htab->elf.dynobj; | |
1092 | ||
1093 | /* Make sure we know what is going on here. */ | |
1094 | BFD_ASSERT (dynobj != NULL | |
1095 | && (h->needs_plt | |
1096 | || h->type == STT_GNU_IFUNC | |
60d67dc8 | 1097 | || h->is_weakalias |
e23eba97 NC |
1098 | || (h->def_dynamic |
1099 | && h->ref_regular | |
1100 | && !h->def_regular))); | |
1101 | ||
1102 | /* If this is a function, put it in the procedure linkage table. We | |
1103 | will fill in the contents of the procedure linkage table later | |
1104 | (although we could actually do it here). */ | |
1105 | if (h->type == STT_FUNC || h->type == STT_GNU_IFUNC || h->needs_plt) | |
1106 | { | |
1107 | if (h->plt.refcount <= 0 | |
02dd9d25 NC |
1108 | || (h->type != STT_GNU_IFUNC |
1109 | && (SYMBOL_CALLS_LOCAL (info, h) | |
1110 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
1111 | && h->root.type == bfd_link_hash_undefweak)))) | |
e23eba97 NC |
1112 | { |
1113 | /* This case can occur if we saw a R_RISCV_CALL_PLT reloc in an | |
1114 | input file, but the symbol was never referred to by a dynamic | |
1115 | object, or if all references were garbage collected. In such | |
1116 | a case, we don't actually need to build a PLT entry. */ | |
1117 | h->plt.offset = (bfd_vma) -1; | |
1118 | h->needs_plt = 0; | |
1119 | } | |
1120 | ||
0a1b45a2 | 1121 | return true; |
e23eba97 NC |
1122 | } |
1123 | else | |
1124 | h->plt.offset = (bfd_vma) -1; | |
1125 | ||
1126 | /* If this is a weak symbol, and there is a real definition, the | |
1127 | processor independent code will have arranged for us to see the | |
1128 | real definition first, and we can just use the same value. */ | |
60d67dc8 | 1129 | if (h->is_weakalias) |
e23eba97 | 1130 | { |
60d67dc8 AM |
1131 | struct elf_link_hash_entry *def = weakdef (h); |
1132 | BFD_ASSERT (def->root.type == bfd_link_hash_defined); | |
1133 | h->root.u.def.section = def->root.u.def.section; | |
1134 | h->root.u.def.value = def->root.u.def.value; | |
0a1b45a2 | 1135 | return true; |
e23eba97 NC |
1136 | } |
1137 | ||
1138 | /* This is a reference to a symbol defined by a dynamic object which | |
1139 | is not a function. */ | |
1140 | ||
1141 | /* If we are creating a shared library, we must presume that the | |
1142 | only references to the symbol are via the global offset table. | |
1143 | For such cases we need not do anything here; the relocations will | |
1144 | be handled correctly by relocate_section. */ | |
1145 | if (bfd_link_pic (info)) | |
0a1b45a2 | 1146 | return true; |
e23eba97 NC |
1147 | |
1148 | /* If there are no references to this symbol that do not use the | |
1149 | GOT, we don't need to generate a copy reloc. */ | |
1150 | if (!h->non_got_ref) | |
0a1b45a2 | 1151 | return true; |
e23eba97 NC |
1152 | |
1153 | /* If -z nocopyreloc was given, we won't generate them either. */ | |
1154 | if (info->nocopyreloc) | |
1155 | { | |
1156 | h->non_got_ref = 0; | |
0a1b45a2 | 1157 | return true; |
e23eba97 NC |
1158 | } |
1159 | ||
3bf083ed | 1160 | /* If we don't find any dynamic relocs in read-only sections, then |
e23eba97 | 1161 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ |
5dbc8b37 | 1162 | if (!_bfd_elf_readonly_dynrelocs (h)) |
e23eba97 NC |
1163 | { |
1164 | h->non_got_ref = 0; | |
0a1b45a2 | 1165 | return true; |
e23eba97 NC |
1166 | } |
1167 | ||
1168 | /* We must allocate the symbol in our .dynbss section, which will | |
1169 | become part of the .bss section of the executable. There will be | |
1170 | an entry for this symbol in the .dynsym section. The dynamic | |
1171 | object will contain position independent code, so all references | |
1172 | from the dynamic object to this symbol will go through the global | |
1173 | offset table. The dynamic linker will use the .dynsym entry to | |
1174 | determine the address it must put in the global offset table, so | |
1175 | both the dynamic object and the regular object will refer to the | |
1176 | same memory location for the variable. */ | |
1177 | ||
1178 | /* We must generate a R_RISCV_COPY reloc to tell the dynamic linker | |
1179 | to copy the initial value out of the dynamic object and into the | |
1180 | runtime process image. We need to remember the offset into the | |
1181 | .rel.bss section we are going to use. */ | |
3bf083ed | 1182 | eh = (struct riscv_elf_link_hash_entry *) h; |
3df5cd13 AW |
1183 | if (eh->tls_type & ~GOT_NORMAL) |
1184 | { | |
1185 | s = htab->sdyntdata; | |
1186 | srel = htab->elf.srelbss; | |
1187 | } | |
1188 | else if ((h->root.u.def.section->flags & SEC_READONLY) != 0) | |
5474d94f AM |
1189 | { |
1190 | s = htab->elf.sdynrelro; | |
1191 | srel = htab->elf.sreldynrelro; | |
1192 | } | |
1193 | else | |
1194 | { | |
1195 | s = htab->elf.sdynbss; | |
1196 | srel = htab->elf.srelbss; | |
1197 | } | |
e23eba97 NC |
1198 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
1199 | { | |
5474d94f | 1200 | srel->size += sizeof (ElfNN_External_Rela); |
e23eba97 NC |
1201 | h->needs_copy = 1; |
1202 | } | |
1203 | ||
5474d94f | 1204 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
e23eba97 NC |
1205 | } |
1206 | ||
1207 | /* Allocate space in .plt, .got and associated reloc sections for | |
1208 | dynamic relocs. */ | |
1209 | ||
0a1b45a2 | 1210 | static bool |
e23eba97 NC |
1211 | allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
1212 | { | |
1213 | struct bfd_link_info *info; | |
1214 | struct riscv_elf_link_hash_table *htab; | |
3bf083ed | 1215 | struct elf_dyn_relocs *p; |
e23eba97 NC |
1216 | |
1217 | if (h->root.type == bfd_link_hash_indirect) | |
0a1b45a2 | 1218 | return true; |
e23eba97 NC |
1219 | |
1220 | info = (struct bfd_link_info *) inf; | |
1221 | htab = riscv_elf_hash_table (info); | |
1222 | BFD_ASSERT (htab != NULL); | |
1223 | ||
18b98722 NC |
1224 | /* When we are generating pde, make sure gp symbol is output as a |
1225 | dynamic symbol. Then ld.so can set the gp register earlier, before | |
1226 | resolving the ifunc. */ | |
1227 | if (!bfd_link_pic (info) | |
1228 | && htab->elf.dynamic_sections_created | |
1229 | && strcmp (h->root.root.string, RISCV_GP_SYMBOL) == 0 | |
1230 | && !bfd_elf_link_record_dynamic_symbol (info, h)) | |
0a1b45a2 | 1231 | return false; |
18b98722 | 1232 | |
02dd9d25 NC |
1233 | /* Since STT_GNU_IFUNC symbols must go through PLT, we handle them |
1234 | in the allocate_ifunc_dynrelocs and allocate_local_ifunc_dynrelocs, | |
1235 | if they are defined and referenced in a non-shared object. */ | |
1236 | if (h->type == STT_GNU_IFUNC | |
1237 | && h->def_regular) | |
0a1b45a2 | 1238 | return true; |
02dd9d25 NC |
1239 | else if (htab->elf.dynamic_sections_created |
1240 | && h->plt.refcount > 0) | |
e23eba97 NC |
1241 | { |
1242 | /* Make sure this symbol is output as a dynamic symbol. | |
1243 | Undefined weak syms won't yet be marked as dynamic. */ | |
1244 | if (h->dynindx == -1 | |
1245 | && !h->forced_local) | |
1246 | { | |
1247 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
0a1b45a2 | 1248 | return false; |
e23eba97 NC |
1249 | } |
1250 | ||
1251 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info), h)) | |
1252 | { | |
1253 | asection *s = htab->elf.splt; | |
1254 | ||
1255 | if (s->size == 0) | |
1256 | s->size = PLT_HEADER_SIZE; | |
1257 | ||
1258 | h->plt.offset = s->size; | |
1259 | ||
1260 | /* Make room for this entry. */ | |
1261 | s->size += PLT_ENTRY_SIZE; | |
1262 | ||
1263 | /* We also need to make an entry in the .got.plt section. */ | |
1264 | htab->elf.sgotplt->size += GOT_ENTRY_SIZE; | |
1265 | ||
1266 | /* We also need to make an entry in the .rela.plt section. */ | |
1267 | htab->elf.srelplt->size += sizeof (ElfNN_External_Rela); | |
1268 | ||
1269 | /* If this symbol is not defined in a regular file, and we are | |
1270 | not generating a shared library, then set the symbol to this | |
1271 | location in the .plt. This is required to make function | |
1272 | pointers compare as equal between the normal executable and | |
1273 | the shared library. */ | |
1274 | if (! bfd_link_pic (info) | |
1275 | && !h->def_regular) | |
1276 | { | |
1277 | h->root.u.def.section = s; | |
1278 | h->root.u.def.value = h->plt.offset; | |
1279 | } | |
8155b853 NC |
1280 | |
1281 | /* If the symbol has STO_RISCV_VARIANT_CC flag, then raise the | |
1282 | variant_cc flag of riscv_elf_link_hash_table. */ | |
1283 | if (h->other & STO_RISCV_VARIANT_CC) | |
1284 | htab->variant_cc = 1; | |
e23eba97 NC |
1285 | } |
1286 | else | |
1287 | { | |
1288 | h->plt.offset = (bfd_vma) -1; | |
1289 | h->needs_plt = 0; | |
1290 | } | |
1291 | } | |
1292 | else | |
1293 | { | |
1294 | h->plt.offset = (bfd_vma) -1; | |
1295 | h->needs_plt = 0; | |
1296 | } | |
1297 | ||
1298 | if (h->got.refcount > 0) | |
1299 | { | |
1300 | asection *s; | |
0a1b45a2 | 1301 | bool dyn; |
e23eba97 NC |
1302 | int tls_type = riscv_elf_hash_entry (h)->tls_type; |
1303 | ||
1304 | /* Make sure this symbol is output as a dynamic symbol. | |
1305 | Undefined weak syms won't yet be marked as dynamic. */ | |
1306 | if (h->dynindx == -1 | |
1307 | && !h->forced_local) | |
1308 | { | |
1309 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
0a1b45a2 | 1310 | return false; |
e23eba97 NC |
1311 | } |
1312 | ||
1313 | s = htab->elf.sgot; | |
1314 | h->got.offset = s->size; | |
1315 | dyn = htab->elf.dynamic_sections_created; | |
1316 | if (tls_type & (GOT_TLS_GD | GOT_TLS_IE)) | |
1317 | { | |
20ef84ed NC |
1318 | int indx = 0; |
1319 | bool need_reloc = false; | |
1320 | RISCV_TLS_GD_IE_NEED_DYN_RELOC(info, dyn, h, indx, need_reloc); | |
1321 | ||
e23eba97 NC |
1322 | /* TLS_GD needs two dynamic relocs and two GOT slots. */ |
1323 | if (tls_type & GOT_TLS_GD) | |
1324 | { | |
e0f747d5 | 1325 | s->size += TLS_GD_GOT_ENTRY_SIZE; |
20ef84ed NC |
1326 | if (need_reloc) |
1327 | htab->elf.srelgot->size += 2 * sizeof (ElfNN_External_Rela); | |
e23eba97 NC |
1328 | } |
1329 | ||
1330 | /* TLS_IE needs one dynamic reloc and one GOT slot. */ | |
1331 | if (tls_type & GOT_TLS_IE) | |
1332 | { | |
e0f747d5 | 1333 | s->size += TLS_IE_GOT_ENTRY_SIZE; |
20ef84ed NC |
1334 | if (need_reloc) |
1335 | htab->elf.srelgot->size += sizeof (ElfNN_External_Rela); | |
e23eba97 NC |
1336 | } |
1337 | } | |
1338 | else | |
1339 | { | |
e0f747d5 | 1340 | s->size += GOT_ENTRY_SIZE; |
6487709f JW |
1341 | if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h) |
1342 | && ! UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) | |
e23eba97 NC |
1343 | htab->elf.srelgot->size += sizeof (ElfNN_External_Rela); |
1344 | } | |
1345 | } | |
1346 | else | |
1347 | h->got.offset = (bfd_vma) -1; | |
1348 | ||
190eb1dd | 1349 | if (h->dyn_relocs == NULL) |
0a1b45a2 | 1350 | return true; |
e23eba97 NC |
1351 | |
1352 | /* In the shared -Bsymbolic case, discard space allocated for | |
1353 | dynamic pc-relative relocs against symbols which turn out to be | |
1354 | defined in regular objects. For the normal shared case, discard | |
1355 | space for pc-relative relocs that have become local due to symbol | |
1356 | visibility changes. */ | |
1357 | ||
1358 | if (bfd_link_pic (info)) | |
1359 | { | |
1360 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
1361 | { | |
3bf083ed | 1362 | struct elf_dyn_relocs **pp; |
e23eba97 | 1363 | |
190eb1dd | 1364 | for (pp = &h->dyn_relocs; (p = *pp) != NULL; ) |
e23eba97 NC |
1365 | { |
1366 | p->count -= p->pc_count; | |
1367 | p->pc_count = 0; | |
1368 | if (p->count == 0) | |
1369 | *pp = p->next; | |
1370 | else | |
1371 | pp = &p->next; | |
1372 | } | |
1373 | } | |
1374 | ||
1375 | /* Also discard relocs on undefined weak syms with non-default | |
1376 | visibility. */ | |
190eb1dd | 1377 | if (h->dyn_relocs != NULL |
e23eba97 NC |
1378 | && h->root.type == bfd_link_hash_undefweak) |
1379 | { | |
6487709f JW |
1380 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
1381 | || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) | |
190eb1dd | 1382 | h->dyn_relocs = NULL; |
e23eba97 NC |
1383 | |
1384 | /* Make sure undefined weak symbols are output as a dynamic | |
1385 | symbol in PIEs. */ | |
1386 | else if (h->dynindx == -1 | |
1387 | && !h->forced_local) | |
1388 | { | |
1389 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
0a1b45a2 | 1390 | return false; |
e23eba97 NC |
1391 | } |
1392 | } | |
1393 | } | |
1394 | else | |
1395 | { | |
1396 | /* For the non-shared case, discard space for relocs against | |
1397 | symbols which turn out to need copy relocs or are not | |
1398 | dynamic. */ | |
1399 | ||
1400 | if (!h->non_got_ref | |
1401 | && ((h->def_dynamic | |
1402 | && !h->def_regular) | |
1403 | || (htab->elf.dynamic_sections_created | |
1404 | && (h->root.type == bfd_link_hash_undefweak | |
1405 | || h->root.type == bfd_link_hash_undefined)))) | |
1406 | { | |
1407 | /* Make sure this symbol is output as a dynamic symbol. | |
1408 | Undefined weak syms won't yet be marked as dynamic. */ | |
1409 | if (h->dynindx == -1 | |
1410 | && !h->forced_local) | |
1411 | { | |
1412 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
0a1b45a2 | 1413 | return false; |
e23eba97 NC |
1414 | } |
1415 | ||
1416 | /* If that succeeded, we know we'll be keeping all the | |
1417 | relocs. */ | |
1418 | if (h->dynindx != -1) | |
1419 | goto keep; | |
1420 | } | |
1421 | ||
190eb1dd | 1422 | h->dyn_relocs = NULL; |
e23eba97 NC |
1423 | |
1424 | keep: ; | |
1425 | } | |
1426 | ||
1427 | /* Finally, allocate space. */ | |
190eb1dd | 1428 | for (p = h->dyn_relocs; p != NULL; p = p->next) |
e23eba97 NC |
1429 | { |
1430 | asection *sreloc = elf_section_data (p->sec)->sreloc; | |
1431 | sreloc->size += p->count * sizeof (ElfNN_External_Rela); | |
1432 | } | |
1433 | ||
0a1b45a2 | 1434 | return true; |
e23eba97 NC |
1435 | } |
1436 | ||
02dd9d25 NC |
1437 | /* Allocate space in .plt, .got and associated reloc sections for |
1438 | ifunc dynamic relocs. */ | |
1439 | ||
0a1b45a2 | 1440 | static bool |
02dd9d25 NC |
1441 | allocate_ifunc_dynrelocs (struct elf_link_hash_entry *h, |
1442 | void *inf) | |
1443 | { | |
1444 | struct bfd_link_info *info; | |
1445 | ||
1446 | if (h->root.type == bfd_link_hash_indirect) | |
0a1b45a2 | 1447 | return true; |
02dd9d25 NC |
1448 | |
1449 | if (h->root.type == bfd_link_hash_warning) | |
1450 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1451 | ||
1452 | info = (struct bfd_link_info *) inf; | |
1453 | ||
1454 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it | |
1455 | here if it is defined and referenced in a non-shared object. */ | |
1456 | if (h->type == STT_GNU_IFUNC | |
1457 | && h->def_regular) | |
1458 | return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, | |
1459 | &h->dyn_relocs, | |
1460 | PLT_ENTRY_SIZE, | |
1461 | PLT_HEADER_SIZE, | |
1462 | GOT_ENTRY_SIZE, | |
0a1b45a2 AM |
1463 | true); |
1464 | return true; | |
02dd9d25 NC |
1465 | } |
1466 | ||
1467 | /* Allocate space in .plt, .got and associated reloc sections for | |
1468 | local ifunc dynamic relocs. */ | |
1469 | ||
1201fda6 | 1470 | static int |
02dd9d25 NC |
1471 | allocate_local_ifunc_dynrelocs (void **slot, void *inf) |
1472 | { | |
1473 | struct elf_link_hash_entry *h | |
1474 | = (struct elf_link_hash_entry *) *slot; | |
1475 | ||
1476 | if (h->type != STT_GNU_IFUNC | |
1477 | || !h->def_regular | |
1478 | || !h->ref_regular | |
1479 | || !h->forced_local | |
1480 | || h->root.type != bfd_link_hash_defined) | |
1481 | abort (); | |
1482 | ||
1483 | return allocate_ifunc_dynrelocs (h, inf); | |
1484 | } | |
1485 | ||
0a1b45a2 | 1486 | static bool |
e23eba97 NC |
1487 | riscv_elf_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) |
1488 | { | |
1489 | struct riscv_elf_link_hash_table *htab; | |
1490 | bfd *dynobj; | |
1491 | asection *s; | |
1492 | bfd *ibfd; | |
1493 | ||
1494 | htab = riscv_elf_hash_table (info); | |
1495 | BFD_ASSERT (htab != NULL); | |
1496 | dynobj = htab->elf.dynobj; | |
1497 | BFD_ASSERT (dynobj != NULL); | |
1498 | ||
1499 | if (elf_hash_table (info)->dynamic_sections_created) | |
1500 | { | |
1501 | /* Set the contents of the .interp section to the interpreter. */ | |
1502 | if (bfd_link_executable (info) && !info->nointerp) | |
1503 | { | |
1504 | s = bfd_get_linker_section (dynobj, ".interp"); | |
1505 | BFD_ASSERT (s != NULL); | |
1506 | s->size = strlen (ELFNN_DYNAMIC_INTERPRETER) + 1; | |
1507 | s->contents = (unsigned char *) ELFNN_DYNAMIC_INTERPRETER; | |
1508 | } | |
1509 | } | |
1510 | ||
1511 | /* Set up .got offsets for local syms, and space for local dynamic | |
1512 | relocs. */ | |
1513 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) | |
1514 | { | |
1515 | bfd_signed_vma *local_got; | |
1516 | bfd_signed_vma *end_local_got; | |
1517 | char *local_tls_type; | |
1518 | bfd_size_type locsymcount; | |
1519 | Elf_Internal_Shdr *symtab_hdr; | |
1520 | asection *srel; | |
1521 | ||
1522 | if (! is_riscv_elf (ibfd)) | |
1523 | continue; | |
1524 | ||
1525 | for (s = ibfd->sections; s != NULL; s = s->next) | |
1526 | { | |
3bf083ed | 1527 | struct elf_dyn_relocs *p; |
e23eba97 NC |
1528 | |
1529 | for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next) | |
1530 | { | |
1531 | if (!bfd_is_abs_section (p->sec) | |
1532 | && bfd_is_abs_section (p->sec->output_section)) | |
1533 | { | |
1534 | /* Input section has been discarded, either because | |
1535 | it is a copy of a linkonce section or due to | |
1536 | linker script /DISCARD/, so we'll be discarding | |
1537 | the relocs too. */ | |
1538 | } | |
1539 | else if (p->count != 0) | |
1540 | { | |
1541 | srel = elf_section_data (p->sec)->sreloc; | |
1542 | srel->size += p->count * sizeof (ElfNN_External_Rela); | |
1543 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) | |
1544 | info->flags |= DF_TEXTREL; | |
1545 | } | |
1546 | } | |
1547 | } | |
1548 | ||
1549 | local_got = elf_local_got_refcounts (ibfd); | |
1550 | if (!local_got) | |
1551 | continue; | |
1552 | ||
1553 | symtab_hdr = &elf_symtab_hdr (ibfd); | |
1554 | locsymcount = symtab_hdr->sh_info; | |
1555 | end_local_got = local_got + locsymcount; | |
1556 | local_tls_type = _bfd_riscv_elf_local_got_tls_type (ibfd); | |
1557 | s = htab->elf.sgot; | |
1558 | srel = htab->elf.srelgot; | |
1559 | for (; local_got < end_local_got; ++local_got, ++local_tls_type) | |
1560 | { | |
1561 | if (*local_got > 0) | |
1562 | { | |
1563 | *local_got = s->size; | |
0ac6b870 TI |
1564 | if (*local_tls_type & (GOT_TLS_GD | GOT_TLS_IE)) |
1565 | { | |
1566 | if (*local_tls_type & GOT_TLS_GD) | |
1567 | { | |
e0f747d5 | 1568 | s->size += TLS_GD_GOT_ENTRY_SIZE; |
0ac6b870 TI |
1569 | if (bfd_link_dll (info)) |
1570 | srel->size += sizeof (ElfNN_External_Rela); | |
1571 | } | |
1572 | if (*local_tls_type & GOT_TLS_IE) | |
1573 | { | |
e0f747d5 | 1574 | s->size += TLS_IE_GOT_ENTRY_SIZE; |
0ac6b870 TI |
1575 | if (bfd_link_dll (info)) |
1576 | srel->size += sizeof (ElfNN_External_Rela); | |
1577 | } | |
1578 | } | |
1579 | else | |
1580 | { | |
e0f747d5 | 1581 | s->size += GOT_ENTRY_SIZE; |
0ac6b870 TI |
1582 | if (bfd_link_pic (info)) |
1583 | srel->size += sizeof (ElfNN_External_Rela); | |
1584 | } | |
e23eba97 NC |
1585 | } |
1586 | else | |
1587 | *local_got = (bfd_vma) -1; | |
1588 | } | |
1589 | } | |
1590 | ||
02dd9d25 NC |
1591 | /* Allocate .plt and .got entries and space dynamic relocs for |
1592 | global symbols. */ | |
e23eba97 NC |
1593 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info); |
1594 | ||
02dd9d25 NC |
1595 | /* Allocate .plt and .got entries and space dynamic relocs for |
1596 | global ifunc symbols. */ | |
1597 | elf_link_hash_traverse (&htab->elf, allocate_ifunc_dynrelocs, info); | |
1598 | ||
1599 | /* Allocate .plt and .got entries and space dynamic relocs for | |
1600 | local ifunc symbols. */ | |
1601 | htab_traverse (htab->loc_hash_table, allocate_local_ifunc_dynrelocs, info); | |
1602 | ||
51a8a7c2 NC |
1603 | /* Used to resolve the dynamic relocs overwite problems when |
1604 | generating static executable. */ | |
1605 | if (htab->elf.irelplt) | |
1606 | htab->last_iplt_index = htab->elf.irelplt->reloc_count - 1; | |
1607 | ||
e23eba97 NC |
1608 | if (htab->elf.sgotplt) |
1609 | { | |
1610 | struct elf_link_hash_entry *got; | |
1611 | got = elf_link_hash_lookup (elf_hash_table (info), | |
1612 | "_GLOBAL_OFFSET_TABLE_", | |
0a1b45a2 | 1613 | false, false, false); |
e23eba97 NC |
1614 | |
1615 | /* Don't allocate .got.plt section if there are no GOT nor PLT | |
1616 | entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */ | |
1617 | if ((got == NULL | |
1618 | || !got->ref_regular_nonweak) | |
1619 | && (htab->elf.sgotplt->size == GOTPLT_HEADER_SIZE) | |
1620 | && (htab->elf.splt == NULL | |
1621 | || htab->elf.splt->size == 0) | |
1622 | && (htab->elf.sgot == NULL | |
1623 | || (htab->elf.sgot->size | |
1624 | == get_elf_backend_data (output_bfd)->got_header_size))) | |
1625 | htab->elf.sgotplt->size = 0; | |
1626 | } | |
1627 | ||
1628 | /* The check_relocs and adjust_dynamic_symbol entry points have | |
1629 | determined the sizes of the various dynamic sections. Allocate | |
1630 | memory for them. */ | |
1631 | for (s = dynobj->sections; s != NULL; s = s->next) | |
1632 | { | |
1633 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
1634 | continue; | |
1635 | ||
1636 | if (s == htab->elf.splt | |
1637 | || s == htab->elf.sgot | |
1638 | || s == htab->elf.sgotplt | |
02dd9d25 NC |
1639 | || s == htab->elf.iplt |
1640 | || s == htab->elf.igotplt | |
5474d94f | 1641 | || s == htab->elf.sdynbss |
3e1b4df8 JW |
1642 | || s == htab->elf.sdynrelro |
1643 | || s == htab->sdyntdata) | |
e23eba97 NC |
1644 | { |
1645 | /* Strip this section if we don't need it; see the | |
1646 | comment below. */ | |
1647 | } | |
3f3328b8 | 1648 | else if (startswith (s->name, ".rela")) |
e23eba97 NC |
1649 | { |
1650 | if (s->size != 0) | |
1651 | { | |
1652 | /* We use the reloc_count field as a counter if we need | |
1653 | to copy relocs into the output file. */ | |
1654 | s->reloc_count = 0; | |
1655 | } | |
1656 | } | |
1657 | else | |
1658 | { | |
1659 | /* It's not one of our sections. */ | |
1660 | continue; | |
1661 | } | |
1662 | ||
1663 | if (s->size == 0) | |
1664 | { | |
1665 | /* If we don't need this section, strip it from the | |
1666 | output file. This is mostly to handle .rela.bss and | |
1667 | .rela.plt. We must create both sections in | |
1668 | create_dynamic_sections, because they must be created | |
1669 | before the linker maps input sections to output | |
1670 | sections. The linker does that before | |
1671 | adjust_dynamic_symbol is called, and it is that | |
1672 | function which decides whether anything needs to go | |
1673 | into these sections. */ | |
1674 | s->flags |= SEC_EXCLUDE; | |
1675 | continue; | |
1676 | } | |
1677 | ||
1678 | if ((s->flags & SEC_HAS_CONTENTS) == 0) | |
1679 | continue; | |
1680 | ||
1681 | /* Allocate memory for the section contents. Zero the memory | |
1682 | for the benefit of .rela.plt, which has 4 unused entries | |
1683 | at the beginning, and we don't want garbage. */ | |
1684 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); | |
1685 | if (s->contents == NULL) | |
0a1b45a2 | 1686 | return false; |
e23eba97 NC |
1687 | } |
1688 | ||
8155b853 NC |
1689 | /* Add dynamic entries. */ |
1690 | if (elf_hash_table (info)->dynamic_sections_created) | |
1691 | { | |
1692 | if (!_bfd_elf_add_dynamic_tags (output_bfd, info, true)) | |
1693 | return false; | |
1694 | ||
1695 | if (htab->variant_cc | |
1696 | && !_bfd_elf_add_dynamic_entry (info, DT_RISCV_VARIANT_CC, 0)) | |
1697 | return false; | |
1698 | } | |
1699 | ||
1700 | return true; | |
e23eba97 NC |
1701 | } |
1702 | ||
1703 | #define TP_OFFSET 0 | |
1704 | #define DTP_OFFSET 0x800 | |
1705 | ||
1706 | /* Return the relocation value for a TLS dtp-relative reloc. */ | |
1707 | ||
1708 | static bfd_vma | |
1709 | dtpoff (struct bfd_link_info *info, bfd_vma address) | |
1710 | { | |
1711 | /* If tls_sec is NULL, we should have signalled an error already. */ | |
1712 | if (elf_hash_table (info)->tls_sec == NULL) | |
1713 | return 0; | |
1714 | return address - elf_hash_table (info)->tls_sec->vma - DTP_OFFSET; | |
1715 | } | |
1716 | ||
1717 | /* Return the relocation value for a static TLS tp-relative relocation. */ | |
1718 | ||
1719 | static bfd_vma | |
1720 | tpoff (struct bfd_link_info *info, bfd_vma address) | |
1721 | { | |
1722 | /* If tls_sec is NULL, we should have signalled an error already. */ | |
1723 | if (elf_hash_table (info)->tls_sec == NULL) | |
1724 | return 0; | |
1725 | return address - elf_hash_table (info)->tls_sec->vma - TP_OFFSET; | |
1726 | } | |
1727 | ||
1728 | /* Return the global pointer's value, or 0 if it is not in use. */ | |
1729 | ||
1730 | static bfd_vma | |
1731 | riscv_global_pointer_value (struct bfd_link_info *info) | |
1732 | { | |
1733 | struct bfd_link_hash_entry *h; | |
1734 | ||
0a1b45a2 | 1735 | h = bfd_link_hash_lookup (info->hash, RISCV_GP_SYMBOL, false, false, true); |
e23eba97 NC |
1736 | if (h == NULL || h->type != bfd_link_hash_defined) |
1737 | return 0; | |
1738 | ||
1739 | return h->u.def.value + sec_addr (h->u.def.section); | |
1740 | } | |
1741 | ||
1742 | /* Emplace a static relocation. */ | |
1743 | ||
1744 | static bfd_reloc_status_type | |
1745 | perform_relocation (const reloc_howto_type *howto, | |
1746 | const Elf_Internal_Rela *rel, | |
1747 | bfd_vma value, | |
1748 | asection *input_section, | |
1749 | bfd *input_bfd, | |
1750 | bfd_byte *contents) | |
1751 | { | |
1752 | if (howto->pc_relative) | |
1753 | value -= sec_addr (input_section) + rel->r_offset; | |
2029e139 | 1754 | |
73d931e5 NC |
1755 | /* PR31179, ignore the non-zero addend of R_RISCV_SUB_ULEB128. */ |
1756 | if (ELFNN_R_TYPE (rel->r_info) != R_RISCV_SUB_ULEB128) | |
1757 | value += rel->r_addend; | |
e23eba97 NC |
1758 | |
1759 | switch (ELFNN_R_TYPE (rel->r_info)) | |
1760 | { | |
1761 | case R_RISCV_HI20: | |
1762 | case R_RISCV_TPREL_HI20: | |
1763 | case R_RISCV_PCREL_HI20: | |
1764 | case R_RISCV_GOT_HI20: | |
1765 | case R_RISCV_TLS_GOT_HI20: | |
1766 | case R_RISCV_TLS_GD_HI20: | |
1767 | if (ARCH_SIZE > 32 && !VALID_UTYPE_IMM (RISCV_CONST_HIGH_PART (value))) | |
1768 | return bfd_reloc_overflow; | |
1769 | value = ENCODE_UTYPE_IMM (RISCV_CONST_HIGH_PART (value)); | |
1770 | break; | |
1771 | ||
1772 | case R_RISCV_LO12_I: | |
1773 | case R_RISCV_GPREL_I: | |
1774 | case R_RISCV_TPREL_LO12_I: | |
45f76423 | 1775 | case R_RISCV_TPREL_I: |
e23eba97 NC |
1776 | case R_RISCV_PCREL_LO12_I: |
1777 | value = ENCODE_ITYPE_IMM (value); | |
1778 | break; | |
1779 | ||
1780 | case R_RISCV_LO12_S: | |
1781 | case R_RISCV_GPREL_S: | |
1782 | case R_RISCV_TPREL_LO12_S: | |
45f76423 | 1783 | case R_RISCV_TPREL_S: |
e23eba97 NC |
1784 | case R_RISCV_PCREL_LO12_S: |
1785 | value = ENCODE_STYPE_IMM (value); | |
1786 | break; | |
1787 | ||
1788 | case R_RISCV_CALL: | |
1789 | case R_RISCV_CALL_PLT: | |
1790 | if (ARCH_SIZE > 32 && !VALID_UTYPE_IMM (RISCV_CONST_HIGH_PART (value))) | |
1791 | return bfd_reloc_overflow; | |
1792 | value = ENCODE_UTYPE_IMM (RISCV_CONST_HIGH_PART (value)) | |
1793 | | (ENCODE_ITYPE_IMM (value) << 32); | |
1794 | break; | |
1795 | ||
1796 | case R_RISCV_JAL: | |
5a9f5403 | 1797 | if (!VALID_JTYPE_IMM (value)) |
e23eba97 | 1798 | return bfd_reloc_overflow; |
5a9f5403 | 1799 | value = ENCODE_JTYPE_IMM (value); |
e23eba97 NC |
1800 | break; |
1801 | ||
1802 | case R_RISCV_BRANCH: | |
5a9f5403 | 1803 | if (!VALID_BTYPE_IMM (value)) |
e23eba97 | 1804 | return bfd_reloc_overflow; |
5a9f5403 | 1805 | value = ENCODE_BTYPE_IMM (value); |
e23eba97 NC |
1806 | break; |
1807 | ||
1808 | case R_RISCV_RVC_BRANCH: | |
5a9f5403 | 1809 | if (!VALID_CBTYPE_IMM (value)) |
e23eba97 | 1810 | return bfd_reloc_overflow; |
5a9f5403 | 1811 | value = ENCODE_CBTYPE_IMM (value); |
e23eba97 NC |
1812 | break; |
1813 | ||
1814 | case R_RISCV_RVC_JUMP: | |
5a9f5403 | 1815 | if (!VALID_CJTYPE_IMM (value)) |
e23eba97 | 1816 | return bfd_reloc_overflow; |
5a9f5403 | 1817 | value = ENCODE_CJTYPE_IMM (value); |
e23eba97 NC |
1818 | break; |
1819 | ||
1820 | case R_RISCV_RVC_LUI: | |
080a4883 JW |
1821 | if (RISCV_CONST_HIGH_PART (value) == 0) |
1822 | { | |
1823 | /* Linker relaxation can convert an address equal to or greater than | |
1824 | 0x800 to slightly below 0x800. C.LUI does not accept zero as a | |
1825 | valid immediate. We can fix this by converting it to a C.LI. */ | |
fbc09e7a MC |
1826 | bfd_vma insn = riscv_get_insn (howto->bitsize, |
1827 | contents + rel->r_offset); | |
080a4883 | 1828 | insn = (insn & ~MATCH_C_LUI) | MATCH_C_LI; |
fbc09e7a | 1829 | riscv_put_insn (howto->bitsize, insn, contents + rel->r_offset); |
5a9f5403 | 1830 | value = ENCODE_CITYPE_IMM (0); |
080a4883 | 1831 | } |
5a9f5403 | 1832 | else if (!VALID_CITYPE_LUI_IMM (RISCV_CONST_HIGH_PART (value))) |
e23eba97 | 1833 | return bfd_reloc_overflow; |
080a4883 | 1834 | else |
5a9f5403 | 1835 | value = ENCODE_CITYPE_LUI_IMM (RISCV_CONST_HIGH_PART (value)); |
e23eba97 NC |
1836 | break; |
1837 | ||
2029e139 | 1838 | /* R_RISCV_SET_ULEB128 won't go into here. */ |
f1cd8b94 KLC |
1839 | case R_RISCV_SUB_ULEB128: |
1840 | { | |
1841 | unsigned int len = 0; | |
1842 | _bfd_read_unsigned_leb128 (input_bfd, contents + rel->r_offset, &len); | |
1843 | ||
1844 | /* Clean the contents value to zero (0x80), but keep the original | |
1845 | length. */ | |
1846 | bfd_byte *p = contents + rel->r_offset; | |
1847 | bfd_byte *endp = p + len - 1; | |
1848 | memset (p, 0x80, len - 1); | |
1849 | *(endp) = 0; | |
1850 | ||
1851 | /* Make sure the length of the new uleb128 value within the | |
1852 | original (available) length. */ | |
1853 | unsigned int new_len = 0; | |
1854 | unsigned int val_t = value; | |
1855 | do | |
1856 | { | |
1857 | new_len++; | |
1858 | val_t >>= 7; | |
1859 | } | |
1860 | while (val_t); | |
1861 | if (new_len > len) | |
1862 | { | |
1863 | _bfd_error_handler | |
1864 | (_("final size of uleb128 value at offset 0x%lx in %pA from " | |
1865 | "%pB exceeds available space"), | |
1866 | (long) rel->r_offset, input_section, input_bfd); | |
1867 | return bfd_reloc_dangerous; | |
1868 | } | |
1869 | else | |
1870 | { | |
1871 | p = _bfd_write_unsigned_leb128 (p, endp, value); | |
1872 | BFD_ASSERT (p); | |
1873 | ||
1874 | /* If the length of the value is reduced and shorter than the | |
1875 | original uleb128 length, then _bfd_write_unsigned_leb128 may | |
1876 | clear the 0x80 to 0x0 for the last byte that was written. | |
1877 | So reset it to keep the the original uleb128 length. */ | |
1878 | if (--p < endp) | |
1879 | *p |= 0x80; | |
1880 | } | |
1881 | return bfd_reloc_ok; | |
1882 | } | |
1883 | ||
e23eba97 NC |
1884 | case R_RISCV_32: |
1885 | case R_RISCV_64: | |
1886 | case R_RISCV_ADD8: | |
1887 | case R_RISCV_ADD16: | |
1888 | case R_RISCV_ADD32: | |
1889 | case R_RISCV_ADD64: | |
45f76423 | 1890 | case R_RISCV_SUB6: |
e23eba97 NC |
1891 | case R_RISCV_SUB8: |
1892 | case R_RISCV_SUB16: | |
1893 | case R_RISCV_SUB32: | |
1894 | case R_RISCV_SUB64: | |
45f76423 AW |
1895 | case R_RISCV_SET6: |
1896 | case R_RISCV_SET8: | |
1897 | case R_RISCV_SET16: | |
1898 | case R_RISCV_SET32: | |
a6cbf936 | 1899 | case R_RISCV_32_PCREL: |
e23eba97 NC |
1900 | case R_RISCV_TLS_DTPREL32: |
1901 | case R_RISCV_TLS_DTPREL64: | |
1902 | break; | |
1903 | ||
ff6f4d9b PD |
1904 | case R_RISCV_DELETE: |
1905 | return bfd_reloc_ok; | |
1906 | ||
e23eba97 NC |
1907 | default: |
1908 | return bfd_reloc_notsupported; | |
1909 | } | |
1910 | ||
fbc09e7a MC |
1911 | bfd_vma word; |
1912 | if (riscv_is_insn_reloc (howto)) | |
1913 | word = riscv_get_insn (howto->bitsize, contents + rel->r_offset); | |
1914 | else | |
1915 | word = bfd_get (howto->bitsize, input_bfd, contents + rel->r_offset); | |
e23eba97 | 1916 | word = (word & ~howto->dst_mask) | (value & howto->dst_mask); |
fbc09e7a MC |
1917 | if (riscv_is_insn_reloc (howto)) |
1918 | riscv_put_insn (howto->bitsize, word, contents + rel->r_offset); | |
1919 | else | |
1920 | bfd_put (howto->bitsize, input_bfd, word, contents + rel->r_offset); | |
e23eba97 NC |
1921 | |
1922 | return bfd_reloc_ok; | |
1923 | } | |
1924 | ||
1925 | /* Remember all PC-relative high-part relocs we've encountered to help us | |
1926 | later resolve the corresponding low-part relocs. */ | |
1927 | ||
1928 | typedef struct | |
1929 | { | |
50331d64 | 1930 | /* PC value. */ |
e23eba97 | 1931 | bfd_vma address; |
50331d64 | 1932 | /* Relocation value with addend. */ |
e23eba97 | 1933 | bfd_vma value; |
50331d64 NC |
1934 | /* Original reloc type. */ |
1935 | int type; | |
e23eba97 NC |
1936 | } riscv_pcrel_hi_reloc; |
1937 | ||
1938 | typedef struct riscv_pcrel_lo_reloc | |
1939 | { | |
50331d64 NC |
1940 | /* PC value of auipc. */ |
1941 | bfd_vma address; | |
1942 | /* Internal relocation. */ | |
1943 | const Elf_Internal_Rela *reloc; | |
1944 | /* Record the following information helps to resolve the %pcrel | |
1945 | which cross different input section. For now we build a hash | |
1946 | for pcrel at the start of riscv_elf_relocate_section, and then | |
1947 | free the hash at the end. But riscv_elf_relocate_section only | |
1948 | handles an input section at a time, so that means we can only | |
1949 | resolve the %pcrel_hi and %pcrel_lo which are in the same input | |
1950 | section. Otherwise, we will report dangerous relocation errors | |
1951 | for those %pcrel which are not in the same input section. */ | |
1942a048 NC |
1952 | asection *input_section; |
1953 | struct bfd_link_info *info; | |
1954 | reloc_howto_type *howto; | |
1942a048 | 1955 | bfd_byte *contents; |
50331d64 | 1956 | /* The next riscv_pcrel_lo_reloc. */ |
1942a048 | 1957 | struct riscv_pcrel_lo_reloc *next; |
e23eba97 NC |
1958 | } riscv_pcrel_lo_reloc; |
1959 | ||
1960 | typedef struct | |
1961 | { | |
50331d64 | 1962 | /* Hash table for riscv_pcrel_hi_reloc. */ |
e23eba97 | 1963 | htab_t hi_relocs; |
50331d64 | 1964 | /* Linked list for riscv_pcrel_lo_reloc. */ |
e23eba97 NC |
1965 | riscv_pcrel_lo_reloc *lo_relocs; |
1966 | } riscv_pcrel_relocs; | |
1967 | ||
1968 | static hashval_t | |
1969 | riscv_pcrel_reloc_hash (const void *entry) | |
1970 | { | |
1971 | const riscv_pcrel_hi_reloc *e = entry; | |
1972 | return (hashval_t)(e->address >> 2); | |
1973 | } | |
1974 | ||
1201fda6 | 1975 | static int |
e23eba97 NC |
1976 | riscv_pcrel_reloc_eq (const void *entry1, const void *entry2) |
1977 | { | |
1978 | const riscv_pcrel_hi_reloc *e1 = entry1, *e2 = entry2; | |
1979 | return e1->address == e2->address; | |
1980 | } | |
1981 | ||
0a1b45a2 | 1982 | static bool |
e23eba97 NC |
1983 | riscv_init_pcrel_relocs (riscv_pcrel_relocs *p) |
1984 | { | |
e23eba97 NC |
1985 | p->lo_relocs = NULL; |
1986 | p->hi_relocs = htab_create (1024, riscv_pcrel_reloc_hash, | |
1987 | riscv_pcrel_reloc_eq, free); | |
1988 | return p->hi_relocs != NULL; | |
1989 | } | |
1990 | ||
1991 | static void | |
1992 | riscv_free_pcrel_relocs (riscv_pcrel_relocs *p) | |
1993 | { | |
1994 | riscv_pcrel_lo_reloc *cur = p->lo_relocs; | |
1995 | ||
1996 | while (cur != NULL) | |
1997 | { | |
1998 | riscv_pcrel_lo_reloc *next = cur->next; | |
1999 | free (cur); | |
2000 | cur = next; | |
2001 | } | |
2002 | ||
2003 | htab_delete (p->hi_relocs); | |
2004 | } | |
2005 | ||
0a1b45a2 | 2006 | static bool |
b1308d2c PD |
2007 | riscv_zero_pcrel_hi_reloc (Elf_Internal_Rela *rel, |
2008 | struct bfd_link_info *info, | |
2009 | bfd_vma pc, | |
2010 | bfd_vma addr, | |
2011 | bfd_byte *contents, | |
50331d64 | 2012 | const reloc_howto_type *howto) |
e23eba97 | 2013 | { |
b1308d2c | 2014 | /* We may need to reference low addreses in PC-relative modes even when the |
dcd709e0 NC |
2015 | PC is far away from these addresses. For example, undefweak references |
2016 | need to produce the address 0 when linked. As 0 is far from the arbitrary | |
2017 | addresses that we can link PC-relative programs at, the linker can't | |
2018 | actually relocate references to those symbols. In order to allow these | |
2019 | programs to work we simply convert the PC-relative auipc sequences to | |
2020 | 0-relative lui sequences. */ | |
b1308d2c | 2021 | if (bfd_link_pic (info)) |
0a1b45a2 | 2022 | return false; |
b1308d2c PD |
2023 | |
2024 | /* If it's possible to reference the symbol using auipc we do so, as that's | |
dcd709e0 | 2025 | more in the spirit of the PC-relative relocations we're processing. */ |
b1308d2c PD |
2026 | bfd_vma offset = addr - pc; |
2027 | if (ARCH_SIZE == 32 || VALID_UTYPE_IMM (RISCV_CONST_HIGH_PART (offset))) | |
0a1b45a2 | 2028 | return false; |
b1308d2c PD |
2029 | |
2030 | /* If it's impossible to reference this with a LUI-based offset then don't | |
dcd709e0 NC |
2031 | bother to convert it at all so users still see the PC-relative relocation |
2032 | in the truncation message. */ | |
b1308d2c | 2033 | if (ARCH_SIZE > 32 && !VALID_UTYPE_IMM (RISCV_CONST_HIGH_PART (addr))) |
0a1b45a2 | 2034 | return false; |
b1308d2c | 2035 | |
1942a048 | 2036 | rel->r_info = ELFNN_R_INFO (addr, R_RISCV_HI20); |
b1308d2c | 2037 | |
1942a048 | 2038 | bfd_vma insn = riscv_get_insn (howto->bitsize, contents + rel->r_offset); |
b1308d2c | 2039 | insn = (insn & ~MASK_AUIPC) | MATCH_LUI; |
1942a048 | 2040 | riscv_put_insn (howto->bitsize, insn, contents + rel->r_offset); |
0a1b45a2 | 2041 | return true; |
b1308d2c PD |
2042 | } |
2043 | ||
0a1b45a2 | 2044 | static bool |
50331d64 NC |
2045 | riscv_record_pcrel_hi_reloc (riscv_pcrel_relocs *p, |
2046 | bfd_vma addr, | |
2047 | bfd_vma value, | |
2048 | int type, | |
2049 | bool absolute) | |
b1308d2c PD |
2050 | { |
2051 | bfd_vma offset = absolute ? value : value - addr; | |
50331d64 | 2052 | riscv_pcrel_hi_reloc entry = {addr, offset, type}; |
e23eba97 NC |
2053 | riscv_pcrel_hi_reloc **slot = |
2054 | (riscv_pcrel_hi_reloc **) htab_find_slot (p->hi_relocs, &entry, INSERT); | |
2055 | ||
2056 | BFD_ASSERT (*slot == NULL); | |
2057 | *slot = (riscv_pcrel_hi_reloc *) bfd_malloc (sizeof (riscv_pcrel_hi_reloc)); | |
2058 | if (*slot == NULL) | |
0a1b45a2 | 2059 | return false; |
e23eba97 | 2060 | **slot = entry; |
0a1b45a2 | 2061 | return true; |
e23eba97 NC |
2062 | } |
2063 | ||
0a1b45a2 | 2064 | static bool |
e23eba97 | 2065 | riscv_record_pcrel_lo_reloc (riscv_pcrel_relocs *p, |
50331d64 NC |
2066 | bfd_vma addr, |
2067 | const Elf_Internal_Rela *reloc, | |
e23eba97 NC |
2068 | asection *input_section, |
2069 | struct bfd_link_info *info, | |
2070 | reloc_howto_type *howto, | |
e23eba97 NC |
2071 | bfd_byte *contents) |
2072 | { | |
2073 | riscv_pcrel_lo_reloc *entry; | |
2074 | entry = (riscv_pcrel_lo_reloc *) bfd_malloc (sizeof (riscv_pcrel_lo_reloc)); | |
2075 | if (entry == NULL) | |
0a1b45a2 | 2076 | return false; |
50331d64 NC |
2077 | *entry = (riscv_pcrel_lo_reloc) {addr, reloc, input_section, info, |
2078 | howto, contents, p->lo_relocs}; | |
e23eba97 | 2079 | p->lo_relocs = entry; |
0a1b45a2 | 2080 | return true; |
e23eba97 NC |
2081 | } |
2082 | ||
0a1b45a2 | 2083 | static bool |
e23eba97 NC |
2084 | riscv_resolve_pcrel_lo_relocs (riscv_pcrel_relocs *p) |
2085 | { | |
2086 | riscv_pcrel_lo_reloc *r; | |
2087 | ||
2088 | for (r = p->lo_relocs; r != NULL; r = r->next) | |
2089 | { | |
2090 | bfd *input_bfd = r->input_section->owner; | |
2091 | ||
50331d64 | 2092 | riscv_pcrel_hi_reloc search = {r->address, 0, 0}; |
e23eba97 | 2093 | riscv_pcrel_hi_reloc *entry = htab_find (p->hi_relocs, &search); |
50331d64 NC |
2094 | /* There may be a risk if the %pcrel_lo with addend refers to |
2095 | an IFUNC symbol. The %pcrel_hi has been relocated to plt, | |
2096 | so the corresponding %pcrel_lo with addend looks wrong. */ | |
2097 | char *string = NULL; | |
2098 | if (entry == NULL) | |
2099 | string = _("%pcrel_lo missing matching %pcrel_hi"); | |
2100 | else if (entry->type == R_RISCV_GOT_HI20 | |
2101 | && r->reloc->r_addend != 0) | |
2102 | string = _("%pcrel_lo with addend isn't allowed for R_RISCV_GOT_HI20"); | |
2103 | else if (RISCV_CONST_HIGH_PART (entry->value) | |
2104 | != RISCV_CONST_HIGH_PART (entry->value + r->reloc->r_addend)) | |
07d6d2b8 | 2105 | { |
50331d64 | 2106 | /* Check the overflow when adding reloc addend. */ |
6f860418 AM |
2107 | string = bfd_asprintf (_("%%pcrel_lo overflow with an addend," |
2108 | " the value of %%pcrel_hi is 0x%" PRIx64 | |
2109 | " without any addend, but may be 0x%" PRIx64 | |
2110 | " after adding the %%pcrel_lo addend"), | |
2111 | (int64_t) RISCV_CONST_HIGH_PART (entry->value), | |
2112 | (int64_t) RISCV_CONST_HIGH_PART | |
2113 | (entry->value + r->reloc->r_addend)); | |
2114 | if (string == NULL) | |
75f03fa7 | 2115 | string = _("%pcrel_lo overflow with an addend"); |
50331d64 | 2116 | } |
75f03fa7 | 2117 | |
50331d64 NC |
2118 | if (string != NULL) |
2119 | { | |
551703cf JW |
2120 | (*r->info->callbacks->reloc_dangerous) |
2121 | (r->info, string, input_bfd, r->input_section, r->reloc->r_offset); | |
0a1b45a2 | 2122 | return true; |
07d6d2b8 | 2123 | } |
e23eba97 NC |
2124 | |
2125 | perform_relocation (r->howto, r->reloc, entry->value, r->input_section, | |
2126 | input_bfd, r->contents); | |
2127 | } | |
2128 | ||
0a1b45a2 | 2129 | return true; |
e23eba97 NC |
2130 | } |
2131 | ||
2132 | /* Relocate a RISC-V ELF section. | |
2133 | ||
2134 | The RELOCATE_SECTION function is called by the new ELF backend linker | |
2135 | to handle the relocations for a section. | |
2136 | ||
2137 | The relocs are always passed as Rela structures. | |
2138 | ||
2139 | This function is responsible for adjusting the section contents as | |
2140 | necessary, and (if generating a relocatable output file) adjusting | |
2141 | the reloc addend as necessary. | |
2142 | ||
2143 | This function does not have to worry about setting the reloc | |
2144 | address or the reloc symbol index. | |
2145 | ||
2146 | LOCAL_SYMS is a pointer to the swapped in local symbols. | |
2147 | ||
2148 | LOCAL_SECTIONS is an array giving the section in the input file | |
2149 | corresponding to the st_shndx field of each local symbol. | |
2150 | ||
2151 | The global hash table entry for the global symbols can be found | |
2152 | via elf_sym_hashes (input_bfd). | |
2153 | ||
2154 | When generating relocatable output, this function must handle | |
2155 | STB_LOCAL/STT_SECTION symbols specially. The output symbol is | |
2156 | going to be the section symbol corresponding to the output | |
2157 | section, which means that the addend must be adjusted | |
2158 | accordingly. */ | |
2159 | ||
0f684201 | 2160 | static int |
e23eba97 NC |
2161 | riscv_elf_relocate_section (bfd *output_bfd, |
2162 | struct bfd_link_info *info, | |
2163 | bfd *input_bfd, | |
2164 | asection *input_section, | |
2165 | bfd_byte *contents, | |
2166 | Elf_Internal_Rela *relocs, | |
2167 | Elf_Internal_Sym *local_syms, | |
2168 | asection **local_sections) | |
2169 | { | |
2170 | Elf_Internal_Rela *rel; | |
2171 | Elf_Internal_Rela *relend; | |
2172 | riscv_pcrel_relocs pcrel_relocs; | |
0a1b45a2 | 2173 | bool ret = false; |
e23eba97 NC |
2174 | struct riscv_elf_link_hash_table *htab = riscv_elf_hash_table (info); |
2175 | Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (input_bfd); | |
2176 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd); | |
2177 | bfd_vma *local_got_offsets = elf_local_got_offsets (input_bfd); | |
f1cd8b94 KLC |
2178 | bfd_vma uleb128_set_vma = 0; |
2179 | Elf_Internal_Rela *uleb128_set_rel = NULL; | |
0a1b45a2 | 2180 | bool absolute; |
e23eba97 NC |
2181 | |
2182 | if (!riscv_init_pcrel_relocs (&pcrel_relocs)) | |
0a1b45a2 | 2183 | return false; |
e23eba97 NC |
2184 | |
2185 | relend = relocs + input_section->reloc_count; | |
2186 | for (rel = relocs; rel < relend; rel++) | |
2187 | { | |
2188 | unsigned long r_symndx; | |
2189 | struct elf_link_hash_entry *h; | |
2190 | Elf_Internal_Sym *sym; | |
2191 | asection *sec; | |
2192 | bfd_vma relocation; | |
2193 | bfd_reloc_status_type r = bfd_reloc_ok; | |
02dd9d25 | 2194 | const char *name = NULL; |
e23eba97 | 2195 | bfd_vma off, ie_off; |
0a1b45a2 | 2196 | bool unresolved_reloc, is_ie = false; |
e23eba97 NC |
2197 | bfd_vma pc = sec_addr (input_section) + rel->r_offset; |
2198 | int r_type = ELFNN_R_TYPE (rel->r_info), tls_type; | |
0aa13fee | 2199 | reloc_howto_type *howto = riscv_elf_rtype_to_howto (input_bfd, r_type); |
e23eba97 | 2200 | const char *msg = NULL; |
0a1b45a2 | 2201 | bool resolved_to_zero; |
e23eba97 | 2202 | |
45359528 | 2203 | if (howto == NULL) |
e23eba97 NC |
2204 | continue; |
2205 | ||
2206 | /* This is a final link. */ | |
2207 | r_symndx = ELFNN_R_SYM (rel->r_info); | |
2208 | h = NULL; | |
2209 | sym = NULL; | |
2210 | sec = NULL; | |
0a1b45a2 | 2211 | unresolved_reloc = false; |
e23eba97 NC |
2212 | if (r_symndx < symtab_hdr->sh_info) |
2213 | { | |
2214 | sym = local_syms + r_symndx; | |
2215 | sec = local_sections[r_symndx]; | |
2216 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); | |
02dd9d25 NC |
2217 | |
2218 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
2219 | if (!bfd_link_relocatable (info) | |
2220 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) | |
2221 | { | |
0a1b45a2 | 2222 | h = riscv_elf_get_local_sym_hash (htab, input_bfd, rel, false); |
02dd9d25 NC |
2223 | if (h == NULL) |
2224 | abort (); | |
2225 | ||
2226 | /* Set STT_GNU_IFUNC symbol value. */ | |
2227 | h->root.u.def.value = sym->st_value; | |
2228 | h->root.u.def.section = sec; | |
2229 | } | |
e23eba97 NC |
2230 | } |
2231 | else | |
2232 | { | |
0a1b45a2 | 2233 | bool warned, ignored; |
e23eba97 NC |
2234 | |
2235 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, | |
2236 | r_symndx, symtab_hdr, sym_hashes, | |
2237 | h, sec, relocation, | |
2238 | unresolved_reloc, warned, ignored); | |
2239 | if (warned) | |
2240 | { | |
2241 | /* To avoid generating warning messages about truncated | |
2242 | relocations, set the relocation's address to be the same as | |
2243 | the start of this section. */ | |
2244 | if (input_section->output_section != NULL) | |
2245 | relocation = input_section->output_section->vma; | |
2246 | else | |
2247 | relocation = 0; | |
2248 | } | |
2249 | } | |
2250 | ||
2251 | if (sec != NULL && discarded_section (sec)) | |
2252 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, | |
2253 | rel, 1, relend, howto, 0, contents); | |
2254 | ||
2255 | if (bfd_link_relocatable (info)) | |
2256 | continue; | |
2257 | ||
02dd9d25 NC |
2258 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
2259 | it here if it is defined in a non-shared object. */ | |
2260 | if (h != NULL | |
2261 | && h->type == STT_GNU_IFUNC | |
2262 | && h->def_regular) | |
2263 | { | |
2264 | asection *plt, *base_got; | |
2265 | ||
2266 | if ((input_section->flags & SEC_ALLOC) == 0) | |
2267 | { | |
2268 | /* If this is a SHT_NOTE section without SHF_ALLOC, treat | |
2269 | STT_GNU_IFUNC symbol as STT_FUNC. */ | |
2270 | if (elf_section_type (input_section) == SHT_NOTE) | |
2271 | goto skip_ifunc; | |
2272 | ||
2273 | /* Dynamic relocs are not propagated for SEC_DEBUGGING | |
2274 | sections because such sections are not SEC_ALLOC and | |
2275 | thus ld.so will not process them. */ | |
2276 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
2277 | continue; | |
2278 | ||
2279 | abort (); | |
2280 | } | |
2281 | else if (h->plt.offset == (bfd_vma) -1 | |
2282 | /* The following relocation may not need the .plt entries | |
2283 | when all references to a STT_GNU_IFUNC symbols are done | |
2284 | via GOT or static function pointers. */ | |
2285 | && r_type != R_RISCV_32 | |
2286 | && r_type != R_RISCV_64 | |
2287 | && r_type != R_RISCV_HI20 | |
2288 | && r_type != R_RISCV_GOT_HI20 | |
2289 | && r_type != R_RISCV_LO12_I | |
2290 | && r_type != R_RISCV_LO12_S) | |
2291 | goto bad_ifunc_reloc; | |
2292 | ||
2293 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
2294 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; | |
2295 | relocation = plt->output_section->vma | |
2296 | + plt->output_offset | |
2297 | + h->plt.offset; | |
2298 | ||
2299 | switch (r_type) | |
2300 | { | |
2301 | case R_RISCV_32: | |
2302 | case R_RISCV_64: | |
2303 | if (rel->r_addend != 0) | |
2304 | { | |
2305 | if (h->root.root.string) | |
2306 | name = h->root.root.string; | |
2307 | else | |
2308 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, NULL); | |
2309 | ||
2310 | _bfd_error_handler | |
2311 | /* xgettext:c-format */ | |
2312 | (_("%pB: relocation %s against STT_GNU_IFUNC " | |
2313 | "symbol `%s' has non-zero addend: %" PRId64), | |
2314 | input_bfd, howto->name, name, (int64_t) rel->r_addend); | |
2315 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 2316 | return false; |
02dd9d25 NC |
2317 | } |
2318 | ||
2319 | /* Generate dynamic relocation only when there is a non-GOT | |
2320 | reference in a shared object or there is no PLT. */ | |
2321 | if ((bfd_link_pic (info) && h->non_got_ref) | |
2322 | || h->plt.offset == (bfd_vma) -1) | |
2323 | { | |
2324 | Elf_Internal_Rela outrel; | |
2325 | asection *sreloc; | |
2326 | ||
2327 | /* Need a dynamic relocation to get the real function | |
2328 | address. */ | |
2329 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, | |
2330 | info, | |
2331 | input_section, | |
2332 | rel->r_offset); | |
2333 | if (outrel.r_offset == (bfd_vma) -1 | |
2334 | || outrel.r_offset == (bfd_vma) -2) | |
2335 | abort (); | |
2336 | ||
2337 | outrel.r_offset += input_section->output_section->vma | |
2338 | + input_section->output_offset; | |
2339 | ||
2340 | if (h->dynindx == -1 | |
2341 | || h->forced_local | |
2342 | || bfd_link_executable (info)) | |
2343 | { | |
2344 | info->callbacks->minfo | |
2345 | (_("Local IFUNC function `%s' in %pB\n"), | |
2346 | h->root.root.string, | |
2347 | h->root.u.def.section->owner); | |
2348 | ||
2349 | /* This symbol is resolved locally. */ | |
2350 | outrel.r_info = ELFNN_R_INFO (0, R_RISCV_IRELATIVE); | |
2351 | outrel.r_addend = h->root.u.def.value | |
2352 | + h->root.u.def.section->output_section->vma | |
2353 | + h->root.u.def.section->output_offset; | |
2354 | } | |
2355 | else | |
2356 | { | |
2357 | outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type); | |
2358 | outrel.r_addend = 0; | |
2359 | } | |
2360 | ||
2361 | /* Dynamic relocations are stored in | |
2362 | 1. .rela.ifunc section in PIC object. | |
2363 | 2. .rela.got section in dynamic executable. | |
2364 | 3. .rela.iplt section in static executable. */ | |
2365 | if (bfd_link_pic (info)) | |
2366 | sreloc = htab->elf.irelifunc; | |
2367 | else if (htab->elf.splt != NULL) | |
2368 | sreloc = htab->elf.srelgot; | |
2369 | else | |
2370 | sreloc = htab->elf.irelplt; | |
2371 | ||
2372 | riscv_elf_append_rela (output_bfd, sreloc, &outrel); | |
2373 | ||
2374 | /* If this reloc is against an external symbol, we | |
2375 | do not want to fiddle with the addend. Otherwise, | |
2376 | we need to include the symbol value so that it | |
2377 | becomes an addend for the dynamic reloc. For an | |
2378 | internal symbol, we have updated addend. */ | |
2379 | continue; | |
2380 | } | |
2381 | goto do_relocation; | |
2382 | ||
2383 | case R_RISCV_GOT_HI20: | |
2384 | base_got = htab->elf.sgot; | |
2385 | off = h->got.offset; | |
2386 | ||
2387 | if (base_got == NULL) | |
2388 | abort (); | |
2389 | ||
2390 | if (off == (bfd_vma) -1) | |
2391 | { | |
2392 | bfd_vma plt_idx; | |
2393 | ||
2394 | /* We can't use h->got.offset here to save state, or | |
2395 | even just remember the offset, as finish_dynamic_symbol | |
2396 | would use that as offset into .got. */ | |
2397 | ||
2398 | if (htab->elf.splt != NULL) | |
2399 | { | |
2400 | plt_idx = (h->plt.offset - PLT_HEADER_SIZE) | |
2401 | / PLT_ENTRY_SIZE; | |
2402 | off = GOTPLT_HEADER_SIZE + (plt_idx * GOT_ENTRY_SIZE); | |
2403 | base_got = htab->elf.sgotplt; | |
2404 | } | |
2405 | else | |
2406 | { | |
2407 | plt_idx = h->plt.offset / PLT_ENTRY_SIZE; | |
2408 | off = plt_idx * GOT_ENTRY_SIZE; | |
2409 | base_got = htab->elf.igotplt; | |
2410 | } | |
2411 | ||
2412 | if (h->dynindx == -1 | |
2413 | || h->forced_local | |
2414 | || info->symbolic) | |
2415 | { | |
2416 | /* This references the local definition. We must | |
2417 | initialize this entry in the global offset table. | |
2418 | Since the offset must always be a multiple of 8, | |
2419 | we use the least significant bit to record | |
2420 | whether we have initialized it already. | |
2421 | ||
2422 | When doing a dynamic link, we create a .rela.got | |
2423 | relocation entry to initialize the value. This | |
2424 | is done in the finish_dynamic_symbol routine. */ | |
2425 | if ((off & 1) != 0) | |
2426 | off &= ~1; | |
2427 | else | |
2428 | { | |
2429 | bfd_put_NN (output_bfd, relocation, | |
2430 | base_got->contents + off); | |
2431 | /* Note that this is harmless for the case, | |
2432 | as -1 | 1 still is -1. */ | |
2433 | h->got.offset |= 1; | |
2434 | } | |
2435 | } | |
2436 | } | |
2437 | ||
2438 | relocation = base_got->output_section->vma | |
2439 | + base_got->output_offset + off; | |
2440 | ||
50331d64 NC |
2441 | if (!riscv_record_pcrel_hi_reloc (&pcrel_relocs, pc, |
2442 | relocation, r_type, | |
2443 | false)) | |
02dd9d25 NC |
2444 | r = bfd_reloc_overflow; |
2445 | goto do_relocation; | |
2446 | ||
2447 | case R_RISCV_CALL: | |
2448 | case R_RISCV_CALL_PLT: | |
2449 | case R_RISCV_HI20: | |
2450 | case R_RISCV_LO12_I: | |
2451 | case R_RISCV_LO12_S: | |
2452 | goto do_relocation; | |
2453 | ||
2454 | case R_RISCV_PCREL_HI20: | |
50331d64 NC |
2455 | if (!riscv_record_pcrel_hi_reloc (&pcrel_relocs, pc, |
2456 | relocation, r_type, | |
2457 | false)) | |
02dd9d25 NC |
2458 | r = bfd_reloc_overflow; |
2459 | goto do_relocation; | |
2460 | ||
2461 | default: | |
1942a048 | 2462 | bad_ifunc_reloc: |
02dd9d25 NC |
2463 | if (h->root.root.string) |
2464 | name = h->root.root.string; | |
2465 | else | |
2466 | /* The entry of local ifunc is fake in global hash table, | |
2467 | we should find the name by the original local symbol. */ | |
2468 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, NULL); | |
2469 | ||
2470 | _bfd_error_handler | |
2471 | /* xgettext:c-format */ | |
2472 | (_("%pB: relocation %s against STT_GNU_IFUNC " | |
2473 | "symbol `%s' isn't supported"), input_bfd, | |
2474 | howto->name, name); | |
2475 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 2476 | return false; |
02dd9d25 NC |
2477 | } |
2478 | } | |
2479 | ||
1942a048 | 2480 | skip_ifunc: |
e23eba97 NC |
2481 | if (h != NULL) |
2482 | name = h->root.root.string; | |
2483 | else | |
2484 | { | |
2485 | name = (bfd_elf_string_from_elf_section | |
2486 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); | |
2487 | if (name == NULL || *name == '\0') | |
fd361982 | 2488 | name = bfd_section_name (sec); |
e23eba97 NC |
2489 | } |
2490 | ||
6487709f JW |
2491 | resolved_to_zero = (h != NULL |
2492 | && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)); | |
2493 | ||
e23eba97 NC |
2494 | switch (r_type) |
2495 | { | |
2496 | case R_RISCV_NONE: | |
45f76423 | 2497 | case R_RISCV_RELAX: |
e23eba97 NC |
2498 | case R_RISCV_TPREL_ADD: |
2499 | case R_RISCV_COPY: | |
2500 | case R_RISCV_JUMP_SLOT: | |
2501 | case R_RISCV_RELATIVE: | |
2502 | /* These require nothing of us at all. */ | |
2503 | continue; | |
2504 | ||
2505 | case R_RISCV_HI20: | |
2506 | case R_RISCV_BRANCH: | |
2507 | case R_RISCV_RVC_BRANCH: | |
2508 | case R_RISCV_RVC_LUI: | |
2509 | case R_RISCV_LO12_I: | |
2510 | case R_RISCV_LO12_S: | |
45f76423 AW |
2511 | case R_RISCV_SET6: |
2512 | case R_RISCV_SET8: | |
2513 | case R_RISCV_SET16: | |
2514 | case R_RISCV_SET32: | |
a6cbf936 | 2515 | case R_RISCV_32_PCREL: |
ff6f4d9b | 2516 | case R_RISCV_DELETE: |
e23eba97 NC |
2517 | /* These require no special handling beyond perform_relocation. */ |
2518 | break; | |
2519 | ||
f1cd8b94 KLC |
2520 | case R_RISCV_SET_ULEB128: |
2521 | if (uleb128_set_rel == NULL) | |
2522 | { | |
2523 | /* Saved for later usage. */ | |
2524 | uleb128_set_vma = relocation; | |
2525 | uleb128_set_rel = rel; | |
2526 | continue; | |
2527 | } | |
2528 | else | |
2529 | { | |
2530 | msg = ("Mismatched R_RISCV_SET_ULEB128, it must be paired with" | |
d86cb166 | 2531 | " and applied before R_RISCV_SUB_ULEB128"); |
f1cd8b94 KLC |
2532 | r = bfd_reloc_dangerous; |
2533 | } | |
2534 | break; | |
2535 | ||
2536 | case R_RISCV_SUB_ULEB128: | |
2537 | if (uleb128_set_rel != NULL | |
2538 | && uleb128_set_rel->r_offset == rel->r_offset) | |
2539 | { | |
73d931e5 NC |
2540 | relocation = uleb128_set_vma - relocation |
2541 | + uleb128_set_rel->r_addend; | |
f1cd8b94 KLC |
2542 | uleb128_set_vma = 0; |
2543 | uleb128_set_rel = NULL; | |
73d931e5 NC |
2544 | |
2545 | /* PR31179, the addend of SUB_ULEB128 should be zero if using | |
2546 | .uleb128, but we make it non-zero by accident in assembler, | |
2547 | so just ignore it in perform_relocation, and make assembler | |
2548 | continue doing the right thing. Don't reset the addend of | |
2549 | SUB_ULEB128 to zero here since it will break the --emit-reloc, | |
2550 | even though the non-zero addend is unexpected. | |
2551 | ||
2552 | We encourage people to rebuild their stuff to get the | |
2553 | non-zero addend of SUB_ULEB128, but that might need some | |
2554 | times, so report warnings to inform people need to rebuild | |
2555 | if --check-uleb128 is enabled. However, since the failed | |
2556 | .reloc cases for ADD/SET/SUB/ULEB128 are rarely to use, it | |
2557 | may acceptable that stop supproting them until people rebuld | |
2558 | their stuff, maybe half-year or one year later. I believe | |
2559 | this might be the least harmful option that we should go. | |
2560 | ||
2561 | Or maybe we should teach people that don't write the | |
2562 | .reloc R_RISCV_SUB* with non-zero constant, and report | |
2563 | warnings/errors in assembler. */ | |
2564 | if (htab->params->check_uleb128 | |
2565 | && rel->r_addend != 0) | |
2566 | _bfd_error_handler (_("%pB: warning: R_RISCV_SUB_ULEB128 with" | |
2567 | " non-zero addend, please rebuild by" | |
2568 | " binutils 2.42 or up"), input_bfd); | |
f1cd8b94 KLC |
2569 | } |
2570 | else | |
2571 | { | |
2572 | msg = ("Mismatched R_RISCV_SUB_ULEB128, it must be paired with" | |
d86cb166 | 2573 | " and applied after R_RISCV_SET_ULEB128"); |
f1cd8b94 KLC |
2574 | r = bfd_reloc_dangerous; |
2575 | } | |
2576 | break; | |
2577 | ||
e23eba97 NC |
2578 | case R_RISCV_GOT_HI20: |
2579 | if (h != NULL) | |
2580 | { | |
e23eba97 NC |
2581 | off = h->got.offset; |
2582 | BFD_ASSERT (off != (bfd_vma) -1); | |
e23eba97 | 2583 | |
23068b02 | 2584 | if (RISCV_RESOLVED_LOCALLY (info, h)) |
e23eba97 | 2585 | { |
23068b02 NC |
2586 | /* We must initialize this entry in the global offset table. |
2587 | Since the offset must always be a multiple of the word | |
2588 | size, we use the least significant bit to record whether | |
e23eba97 NC |
2589 | we have initialized it already. |
2590 | ||
2591 | When doing a dynamic link, we create a .rela.got | |
2592 | relocation entry to initialize the value. This | |
2593 | is done in the finish_dynamic_symbol routine. */ | |
2594 | if ((off & 1) != 0) | |
2595 | off &= ~1; | |
2596 | else | |
2597 | { | |
2598 | bfd_put_NN (output_bfd, relocation, | |
2599 | htab->elf.sgot->contents + off); | |
2600 | h->got.offset |= 1; | |
2601 | } | |
2602 | } | |
2603 | else | |
0a1b45a2 | 2604 | unresolved_reloc = false; |
e23eba97 NC |
2605 | } |
2606 | else | |
2607 | { | |
2608 | BFD_ASSERT (local_got_offsets != NULL | |
2609 | && local_got_offsets[r_symndx] != (bfd_vma) -1); | |
2610 | ||
2611 | off = local_got_offsets[r_symndx]; | |
2612 | ||
2613 | /* The offset must always be a multiple of the word size. | |
2614 | So, we can use the least significant bit to record | |
2615 | whether we have already processed this entry. */ | |
2616 | if ((off & 1) != 0) | |
2617 | off &= ~1; | |
2618 | else | |
2619 | { | |
2620 | if (bfd_link_pic (info)) | |
2621 | { | |
2622 | asection *s; | |
2623 | Elf_Internal_Rela outrel; | |
2624 | ||
2625 | /* We need to generate a R_RISCV_RELATIVE reloc | |
2626 | for the dynamic linker. */ | |
2627 | s = htab->elf.srelgot; | |
2628 | BFD_ASSERT (s != NULL); | |
2629 | ||
2630 | outrel.r_offset = sec_addr (htab->elf.sgot) + off; | |
2631 | outrel.r_info = | |
2632 | ELFNN_R_INFO (0, R_RISCV_RELATIVE); | |
2633 | outrel.r_addend = relocation; | |
2634 | relocation = 0; | |
2635 | riscv_elf_append_rela (output_bfd, s, &outrel); | |
2636 | } | |
2637 | ||
2638 | bfd_put_NN (output_bfd, relocation, | |
2639 | htab->elf.sgot->contents + off); | |
2640 | local_got_offsets[r_symndx] |= 1; | |
2641 | } | |
2642 | } | |
50331d64 NC |
2643 | |
2644 | if (rel->r_addend != 0) | |
2645 | { | |
2646 | msg = _("The addend isn't allowed for R_RISCV_GOT_HI20"); | |
2647 | r = bfd_reloc_dangerous; | |
2648 | } | |
2649 | else | |
2650 | { | |
2651 | /* Address of got entry. */ | |
2652 | relocation = sec_addr (htab->elf.sgot) + off; | |
2653 | absolute = riscv_zero_pcrel_hi_reloc (rel, info, pc, | |
2654 | relocation, contents, | |
2655 | howto); | |
2656 | /* Update howto if relocation is changed. */ | |
2657 | howto = riscv_elf_rtype_to_howto (input_bfd, | |
2658 | ELFNN_R_TYPE (rel->r_info)); | |
2659 | if (howto == NULL) | |
2660 | r = bfd_reloc_notsupported; | |
2661 | else if (!riscv_record_pcrel_hi_reloc (&pcrel_relocs, pc, | |
2662 | relocation, r_type, | |
2663 | absolute)) | |
2664 | r = bfd_reloc_overflow; | |
2665 | } | |
e23eba97 NC |
2666 | break; |
2667 | ||
2668 | case R_RISCV_ADD8: | |
2669 | case R_RISCV_ADD16: | |
2670 | case R_RISCV_ADD32: | |
2671 | case R_RISCV_ADD64: | |
2672 | { | |
2673 | bfd_vma old_value = bfd_get (howto->bitsize, input_bfd, | |
2674 | contents + rel->r_offset); | |
2675 | relocation = old_value + relocation; | |
2676 | } | |
2677 | break; | |
2678 | ||
45f76423 | 2679 | case R_RISCV_SUB6: |
06f0a892 XZ |
2680 | { |
2681 | bfd_vma old_value = bfd_get (howto->bitsize, input_bfd, | |
2682 | contents + rel->r_offset); | |
2683 | relocation = (old_value & ~howto->dst_mask) | |
2684 | | (((old_value & howto->dst_mask) - relocation) | |
2685 | & howto->dst_mask); | |
2686 | } | |
2687 | break; | |
2688 | ||
e23eba97 NC |
2689 | case R_RISCV_SUB8: |
2690 | case R_RISCV_SUB16: | |
2691 | case R_RISCV_SUB32: | |
2692 | case R_RISCV_SUB64: | |
2693 | { | |
2694 | bfd_vma old_value = bfd_get (howto->bitsize, input_bfd, | |
2695 | contents + rel->r_offset); | |
2696 | relocation = old_value - relocation; | |
2697 | } | |
2698 | break; | |
2699 | ||
e23eba97 | 2700 | case R_RISCV_CALL: |
85f78364 | 2701 | case R_RISCV_CALL_PLT: |
cf7a5066 JW |
2702 | /* Handle a call to an undefined weak function. This won't be |
2703 | relaxed, so we have to handle it here. */ | |
2704 | if (h != NULL && h->root.type == bfd_link_hash_undefweak | |
85f78364 | 2705 | && (!bfd_link_pic (info) || h->plt.offset == MINUS_ONE)) |
cf7a5066 JW |
2706 | { |
2707 | /* We can use x0 as the base register. */ | |
fbc09e7a | 2708 | bfd_vma insn = bfd_getl32 (contents + rel->r_offset + 4); |
cf7a5066 | 2709 | insn &= ~(OP_MASK_RS1 << OP_SH_RS1); |
fbc09e7a | 2710 | bfd_putl32 (insn, contents + rel->r_offset + 4); |
cf7a5066 JW |
2711 | /* Set the relocation value so that we get 0 after the pc |
2712 | relative adjustment. */ | |
2713 | relocation = sec_addr (input_section) + rel->r_offset; | |
2714 | } | |
2715 | /* Fall through. */ | |
2716 | ||
e23eba97 NC |
2717 | case R_RISCV_JAL: |
2718 | case R_RISCV_RVC_JUMP: | |
ecb915b4 | 2719 | if (bfd_link_pic (info) && h != NULL) |
e23eba97 | 2720 | { |
ecb915b4 NC |
2721 | if (h->plt.offset != MINUS_ONE) |
2722 | { | |
2723 | /* Refer to the PLT entry. This check has to match the | |
2724 | check in _bfd_riscv_relax_section. */ | |
2725 | relocation = sec_addr (htab->elf.splt) + h->plt.offset; | |
2726 | unresolved_reloc = false; | |
2727 | } | |
2728 | else if (!SYMBOL_REFERENCES_LOCAL (info, h) | |
2729 | && (input_section->flags & SEC_ALLOC) != 0 | |
2730 | && (input_section->flags & SEC_READONLY) != 0 | |
2731 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) | |
2732 | { | |
2733 | /* PR 28509, when generating the shared object, these | |
2734 | referenced symbols may bind externally, which means | |
2735 | they will be exported to the dynamic symbol table, | |
2736 | and are preemptible by default. These symbols cannot | |
2737 | be referenced by the non-pic relocations, like | |
2738 | R_RISCV_JAL and R_RISCV_RVC_JUMP relocations. | |
2739 | ||
2740 | However, consider that linker may relax the R_RISCV_CALL | |
2741 | relocations to R_RISCV_JAL or R_RISCV_RVC_JUMP, if | |
2742 | these relocations are relocated to the plt entries, | |
2743 | then we won't report error for them. | |
2744 | ||
2745 | Perhaps we also need the similar checks for the | |
2746 | R_RISCV_BRANCH and R_RISCV_RVC_BRANCH relocations. */ | |
6f860418 AM |
2747 | msg = bfd_asprintf (_("%%X%%P: relocation %s against `%s'" |
2748 | " which may bind externally" | |
2749 | " can not be used" | |
2750 | " when making a shared object;" | |
2751 | " recompile with -fPIC\n"), | |
2752 | howto->name, h->root.root.string); | |
ecb915b4 NC |
2753 | r = bfd_reloc_notsupported; |
2754 | } | |
e23eba97 NC |
2755 | } |
2756 | break; | |
2757 | ||
2758 | case R_RISCV_TPREL_HI20: | |
2759 | relocation = tpoff (info, relocation); | |
2760 | break; | |
2761 | ||
2762 | case R_RISCV_TPREL_LO12_I: | |
2763 | case R_RISCV_TPREL_LO12_S: | |
45f76423 AW |
2764 | relocation = tpoff (info, relocation); |
2765 | break; | |
2766 | ||
2767 | case R_RISCV_TPREL_I: | |
2768 | case R_RISCV_TPREL_S: | |
e23eba97 NC |
2769 | relocation = tpoff (info, relocation); |
2770 | if (VALID_ITYPE_IMM (relocation + rel->r_addend)) | |
2771 | { | |
2772 | /* We can use tp as the base register. */ | |
fbc09e7a | 2773 | bfd_vma insn = bfd_getl32 (contents + rel->r_offset); |
e23eba97 NC |
2774 | insn &= ~(OP_MASK_RS1 << OP_SH_RS1); |
2775 | insn |= X_TP << OP_SH_RS1; | |
fbc09e7a | 2776 | bfd_putl32 (insn, contents + rel->r_offset); |
e23eba97 | 2777 | } |
45f76423 AW |
2778 | else |
2779 | r = bfd_reloc_overflow; | |
e23eba97 NC |
2780 | break; |
2781 | ||
2782 | case R_RISCV_GPREL_I: | |
2783 | case R_RISCV_GPREL_S: | |
2784 | { | |
2785 | bfd_vma gp = riscv_global_pointer_value (info); | |
0a1b45a2 | 2786 | bool x0_base = VALID_ITYPE_IMM (relocation + rel->r_addend); |
e23eba97 NC |
2787 | if (x0_base || VALID_ITYPE_IMM (relocation + rel->r_addend - gp)) |
2788 | { | |
2789 | /* We can use x0 or gp as the base register. */ | |
fbc09e7a | 2790 | bfd_vma insn = bfd_getl32 (contents + rel->r_offset); |
e23eba97 NC |
2791 | insn &= ~(OP_MASK_RS1 << OP_SH_RS1); |
2792 | if (!x0_base) | |
2793 | { | |
2794 | rel->r_addend -= gp; | |
2795 | insn |= X_GP << OP_SH_RS1; | |
2796 | } | |
fbc09e7a | 2797 | bfd_putl32 (insn, contents + rel->r_offset); |
e23eba97 NC |
2798 | } |
2799 | else | |
2800 | r = bfd_reloc_overflow; | |
2801 | break; | |
2802 | } | |
2803 | ||
2804 | case R_RISCV_PCREL_HI20: | |
50331d64 NC |
2805 | absolute = riscv_zero_pcrel_hi_reloc (rel, info, pc, relocation, |
2806 | contents, howto); | |
2807 | /* Update howto if relocation is changed. */ | |
2808 | howto = riscv_elf_rtype_to_howto (input_bfd, | |
2809 | ELFNN_R_TYPE (rel->r_info)); | |
f3185997 NC |
2810 | if (howto == NULL) |
2811 | r = bfd_reloc_notsupported; | |
2812 | else if (!riscv_record_pcrel_hi_reloc (&pcrel_relocs, pc, | |
2813 | relocation + rel->r_addend, | |
50331d64 | 2814 | r_type, absolute)) |
e23eba97 NC |
2815 | r = bfd_reloc_overflow; |
2816 | break; | |
2817 | ||
2818 | case R_RISCV_PCREL_LO12_I: | |
2819 | case R_RISCV_PCREL_LO12_S: | |
551703cf JW |
2820 | /* We don't allow section symbols plus addends as the auipc address, |
2821 | because then riscv_relax_delete_bytes would have to search through | |
2822 | all relocs to update these addends. This is also ambiguous, as | |
2823 | we do allow offsets to be added to the target address, which are | |
2824 | not to be used to find the auipc address. */ | |
a9f5a551 JW |
2825 | if (((sym != NULL && (ELF_ST_TYPE (sym->st_info) == STT_SECTION)) |
2826 | || (h != NULL && h->type == STT_SECTION)) | |
2827 | && rel->r_addend) | |
2a0d9853 | 2828 | { |
330a6637 | 2829 | msg = _("%pcrel_lo section symbol with an addend"); |
2a0d9853 JW |
2830 | r = bfd_reloc_dangerous; |
2831 | break; | |
2832 | } | |
2833 | ||
50331d64 NC |
2834 | if (riscv_record_pcrel_lo_reloc (&pcrel_relocs, relocation, rel, |
2835 | input_section, info, howto, | |
e23eba97 NC |
2836 | contents)) |
2837 | continue; | |
2838 | r = bfd_reloc_overflow; | |
2839 | break; | |
2840 | ||
2841 | case R_RISCV_TLS_DTPREL32: | |
2842 | case R_RISCV_TLS_DTPREL64: | |
2843 | relocation = dtpoff (info, relocation); | |
2844 | break; | |
2845 | ||
2846 | case R_RISCV_32: | |
b679fb48 NC |
2847 | /* Non ABS symbol should be blocked in check_relocs. */ |
2848 | if (ARCH_SIZE > 32) | |
2849 | break; | |
2850 | /* Fall through. */ | |
2851 | ||
e23eba97 NC |
2852 | case R_RISCV_64: |
2853 | if ((input_section->flags & SEC_ALLOC) == 0) | |
2854 | break; | |
2855 | ||
23068b02 NC |
2856 | if (RISCV_GENERATE_DYNAMIC_RELOC (howto->pc_relative, info, h, |
2857 | resolved_to_zero)) | |
e23eba97 NC |
2858 | { |
2859 | Elf_Internal_Rela outrel; | |
02dd9d25 | 2860 | asection *sreloc; |
e23eba97 NC |
2861 | |
2862 | /* When generating a shared object, these relocations | |
2863 | are copied into the output file to be resolved at run | |
2864 | time. */ | |
2865 | ||
2866 | outrel.r_offset = | |
2867 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
2868 | rel->r_offset); | |
b679fb48 NC |
2869 | bool skip = false; |
2870 | bool relocate = false; | |
2871 | if (outrel.r_offset == (bfd_vma) -1) | |
2872 | skip = true; | |
2873 | else if (outrel.r_offset == (bfd_vma) -2) | |
2874 | { | |
2875 | skip = true; | |
2876 | relocate = true; | |
2877 | } | |
2878 | else if (h != NULL && bfd_is_abs_symbol (&h->root)) | |
2879 | { | |
2880 | /* Don't need dynamic reloc when the ABS symbol is | |
2881 | non-dynamic or forced to local. Maybe just use | |
2882 | SYMBOL_REFERENCES_LOCAL to check? */ | |
2883 | skip = (h->forced_local || (h->dynindx == -1)); | |
2884 | relocate = skip; | |
2885 | } | |
2886 | ||
e23eba97 NC |
2887 | outrel.r_offset += sec_addr (input_section); |
2888 | ||
b679fb48 NC |
2889 | if (skip) |
2890 | memset (&outrel, 0, sizeof outrel); /* R_RISCV_NONE. */ | |
23068b02 | 2891 | else if (RISCV_COPY_INPUT_RELOC (info, h)) |
e23eba97 | 2892 | { |
b679fb48 | 2893 | /* Maybe just use !SYMBOL_REFERENCES_LOCAL to check? */ |
e23eba97 NC |
2894 | outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type); |
2895 | outrel.r_addend = rel->r_addend; | |
2896 | } | |
2897 | else | |
2898 | { | |
b679fb48 | 2899 | /* This symbol is local, or marked to become local. */ |
e23eba97 NC |
2900 | outrel.r_info = ELFNN_R_INFO (0, R_RISCV_RELATIVE); |
2901 | outrel.r_addend = relocation + rel->r_addend; | |
2902 | } | |
2903 | ||
02dd9d25 | 2904 | sreloc = elf_section_data (input_section)->sreloc; |
e23eba97 | 2905 | riscv_elf_append_rela (output_bfd, sreloc, &outrel); |
b679fb48 | 2906 | if (!relocate) |
e23eba97 NC |
2907 | continue; |
2908 | } | |
2909 | break; | |
2910 | ||
2911 | case R_RISCV_TLS_GOT_HI20: | |
0a1b45a2 | 2912 | is_ie = true; |
e23eba97 NC |
2913 | /* Fall through. */ |
2914 | ||
2915 | case R_RISCV_TLS_GD_HI20: | |
2916 | if (h != NULL) | |
2917 | { | |
2918 | off = h->got.offset; | |
2919 | h->got.offset |= 1; | |
2920 | } | |
2921 | else | |
2922 | { | |
2923 | off = local_got_offsets[r_symndx]; | |
2924 | local_got_offsets[r_symndx] |= 1; | |
2925 | } | |
2926 | ||
2927 | tls_type = _bfd_riscv_elf_tls_type (input_bfd, h, r_symndx); | |
2928 | BFD_ASSERT (tls_type & (GOT_TLS_IE | GOT_TLS_GD)); | |
2929 | /* If this symbol is referenced by both GD and IE TLS, the IE | |
2930 | reference's GOT slot follows the GD reference's slots. */ | |
2931 | ie_off = 0; | |
2932 | if ((tls_type & GOT_TLS_GD) && (tls_type & GOT_TLS_IE)) | |
e0f747d5 | 2933 | ie_off = TLS_GD_GOT_ENTRY_SIZE; |
e23eba97 NC |
2934 | |
2935 | if ((off & 1) != 0) | |
2936 | off &= ~1; | |
2937 | else | |
2938 | { | |
2939 | Elf_Internal_Rela outrel; | |
2940 | int indx = 0; | |
0a1b45a2 | 2941 | bool need_relocs = false; |
e23eba97 NC |
2942 | |
2943 | if (htab->elf.srelgot == NULL) | |
2944 | abort (); | |
2945 | ||
225df051 | 2946 | bool dyn = elf_hash_table (info)->dynamic_sections_created; |
20ef84ed | 2947 | RISCV_TLS_GD_IE_NEED_DYN_RELOC (info, dyn, h, indx, need_relocs); |
e23eba97 NC |
2948 | |
2949 | /* The GOT entries have not been initialized yet. Do it | |
07d6d2b8 | 2950 | now, and emit any relocations. */ |
e23eba97 NC |
2951 | if (tls_type & GOT_TLS_GD) |
2952 | { | |
2953 | if (need_relocs) | |
2954 | { | |
2955 | outrel.r_offset = sec_addr (htab->elf.sgot) + off; | |
2956 | outrel.r_addend = 0; | |
2957 | outrel.r_info = ELFNN_R_INFO (indx, R_RISCV_TLS_DTPMODNN); | |
2958 | bfd_put_NN (output_bfd, 0, | |
2959 | htab->elf.sgot->contents + off); | |
2960 | riscv_elf_append_rela (output_bfd, htab->elf.srelgot, &outrel); | |
2961 | if (indx == 0) | |
2962 | { | |
2963 | BFD_ASSERT (! unresolved_reloc); | |
2964 | bfd_put_NN (output_bfd, | |
2965 | dtpoff (info, relocation), | |
1942a048 NC |
2966 | (htab->elf.sgot->contents |
2967 | + off + RISCV_ELF_WORD_BYTES)); | |
e23eba97 NC |
2968 | } |
2969 | else | |
2970 | { | |
2971 | bfd_put_NN (output_bfd, 0, | |
1942a048 NC |
2972 | (htab->elf.sgot->contents |
2973 | + off + RISCV_ELF_WORD_BYTES)); | |
e23eba97 NC |
2974 | outrel.r_info = ELFNN_R_INFO (indx, R_RISCV_TLS_DTPRELNN); |
2975 | outrel.r_offset += RISCV_ELF_WORD_BYTES; | |
2976 | riscv_elf_append_rela (output_bfd, htab->elf.srelgot, &outrel); | |
2977 | } | |
2978 | } | |
2979 | else | |
2980 | { | |
2981 | /* If we are not emitting relocations for a | |
2982 | general dynamic reference, then we must be in a | |
2983 | static link or an executable link with the | |
2984 | symbol binding locally. Mark it as belonging | |
2985 | to module 1, the executable. */ | |
2986 | bfd_put_NN (output_bfd, 1, | |
2987 | htab->elf.sgot->contents + off); | |
2988 | bfd_put_NN (output_bfd, | |
2989 | dtpoff (info, relocation), | |
1942a048 NC |
2990 | (htab->elf.sgot->contents |
2991 | + off + RISCV_ELF_WORD_BYTES)); | |
e23eba97 NC |
2992 | } |
2993 | } | |
2994 | ||
2995 | if (tls_type & GOT_TLS_IE) | |
2996 | { | |
2997 | if (need_relocs) | |
2998 | { | |
2999 | bfd_put_NN (output_bfd, 0, | |
3000 | htab->elf.sgot->contents + off + ie_off); | |
3001 | outrel.r_offset = sec_addr (htab->elf.sgot) | |
1942a048 | 3002 | + off + ie_off; |
e23eba97 NC |
3003 | outrel.r_addend = 0; |
3004 | if (indx == 0) | |
3005 | outrel.r_addend = tpoff (info, relocation); | |
3006 | outrel.r_info = ELFNN_R_INFO (indx, R_RISCV_TLS_TPRELNN); | |
3007 | riscv_elf_append_rela (output_bfd, htab->elf.srelgot, &outrel); | |
3008 | } | |
3009 | else | |
3010 | { | |
3011 | bfd_put_NN (output_bfd, tpoff (info, relocation), | |
3012 | htab->elf.sgot->contents + off + ie_off); | |
3013 | } | |
3014 | } | |
3015 | } | |
3016 | ||
3017 | BFD_ASSERT (off < (bfd_vma) -2); | |
3018 | relocation = sec_addr (htab->elf.sgot) + off + (is_ie ? ie_off : 0); | |
b1308d2c | 3019 | if (!riscv_record_pcrel_hi_reloc (&pcrel_relocs, pc, |
50331d64 NC |
3020 | relocation, r_type, |
3021 | false)) | |
e23eba97 | 3022 | r = bfd_reloc_overflow; |
0a1b45a2 | 3023 | unresolved_reloc = false; |
e23eba97 NC |
3024 | break; |
3025 | ||
3026 | default: | |
3027 | r = bfd_reloc_notsupported; | |
3028 | } | |
3029 | ||
3030 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections | |
3031 | because such sections are not SEC_ALLOC and thus ld.so will | |
3032 | not process them. */ | |
3033 | if (unresolved_reloc | |
3034 | && !((input_section->flags & SEC_DEBUGGING) != 0 | |
3035 | && h->def_dynamic) | |
3036 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
3037 | rel->r_offset) != (bfd_vma) -1) | |
3038 | { | |
6f860418 AM |
3039 | msg = bfd_asprintf (_("%%X%%P: unresolvable %s relocation against " |
3040 | "symbol `%s'\n"), | |
3041 | howto->name, | |
3042 | h->root.root.string); | |
330a6637 | 3043 | r = bfd_reloc_notsupported; |
e23eba97 NC |
3044 | } |
3045 | ||
02dd9d25 | 3046 | do_relocation: |
e23eba97 NC |
3047 | if (r == bfd_reloc_ok) |
3048 | r = perform_relocation (howto, rel, relocation, input_section, | |
3049 | input_bfd, contents); | |
3050 | ||
330a6637 JW |
3051 | /* We should have already detected the error and set message before. |
3052 | If the error message isn't set since the linker runs out of memory | |
3053 | or we don't set it before, then we should set the default message | |
3054 | with the "internal error" string here. */ | |
e23eba97 NC |
3055 | switch (r) |
3056 | { | |
3057 | case bfd_reloc_ok: | |
3058 | continue; | |
3059 | ||
3060 | case bfd_reloc_overflow: | |
3061 | info->callbacks->reloc_overflow | |
3062 | (info, (h ? &h->root : NULL), name, howto->name, | |
3063 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
3064 | break; | |
3065 | ||
3066 | case bfd_reloc_undefined: | |
3067 | info->callbacks->undefined_symbol | |
3068 | (info, name, input_bfd, input_section, rel->r_offset, | |
0a1b45a2 | 3069 | true); |
e23eba97 NC |
3070 | break; |
3071 | ||
3072 | case bfd_reloc_outofrange: | |
330a6637 JW |
3073 | if (msg == NULL) |
3074 | msg = _("%X%P: internal error: out of range error\n"); | |
e23eba97 NC |
3075 | break; |
3076 | ||
3077 | case bfd_reloc_notsupported: | |
330a6637 JW |
3078 | if (msg == NULL) |
3079 | msg = _("%X%P: internal error: unsupported relocation error\n"); | |
e23eba97 NC |
3080 | break; |
3081 | ||
3082 | case bfd_reloc_dangerous: | |
330a6637 JW |
3083 | /* The error message should already be set. */ |
3084 | if (msg == NULL) | |
3085 | msg = _("dangerous relocation error"); | |
2a0d9853 | 3086 | info->callbacks->reloc_dangerous |
330a6637 | 3087 | (info, msg, input_bfd, input_section, rel->r_offset); |
e23eba97 NC |
3088 | break; |
3089 | ||
3090 | default: | |
2a0d9853 | 3091 | msg = _("%X%P: internal error: unknown error\n"); |
e23eba97 NC |
3092 | break; |
3093 | } | |
3094 | ||
330a6637 JW |
3095 | /* Do not report error message for the dangerous relocation again. */ |
3096 | if (msg && r != bfd_reloc_dangerous) | |
2a0d9853 JW |
3097 | info->callbacks->einfo (msg); |
3098 | ||
3f48fe4a JW |
3099 | /* We already reported the error via a callback, so don't try to report |
3100 | it again by returning false. That leads to spurious errors. */ | |
0a1b45a2 | 3101 | ret = true; |
e23eba97 NC |
3102 | goto out; |
3103 | } | |
3104 | ||
3105 | ret = riscv_resolve_pcrel_lo_relocs (&pcrel_relocs); | |
dc1e8a47 | 3106 | out: |
e23eba97 NC |
3107 | riscv_free_pcrel_relocs (&pcrel_relocs); |
3108 | return ret; | |
3109 | } | |
3110 | ||
3111 | /* Finish up dynamic symbol handling. We set the contents of various | |
3112 | dynamic sections here. */ | |
3113 | ||
0a1b45a2 | 3114 | static bool |
e23eba97 NC |
3115 | riscv_elf_finish_dynamic_symbol (bfd *output_bfd, |
3116 | struct bfd_link_info *info, | |
3117 | struct elf_link_hash_entry *h, | |
3118 | Elf_Internal_Sym *sym) | |
3119 | { | |
3120 | struct riscv_elf_link_hash_table *htab = riscv_elf_hash_table (info); | |
3121 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); | |
3122 | ||
3123 | if (h->plt.offset != (bfd_vma) -1) | |
3124 | { | |
3125 | /* We've decided to create a PLT entry for this symbol. */ | |
3126 | bfd_byte *loc; | |
02dd9d25 | 3127 | bfd_vma i, header_address, plt_idx, got_offset, got_address; |
e23eba97 NC |
3128 | uint32_t plt_entry[PLT_ENTRY_INSNS]; |
3129 | Elf_Internal_Rela rela; | |
02dd9d25 NC |
3130 | asection *plt, *gotplt, *relplt; |
3131 | ||
3132 | /* When building a static executable, use .iplt, .igot.plt and | |
3133 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
3134 | if (htab->elf.splt != NULL) | |
3135 | { | |
3136 | plt = htab->elf.splt; | |
3137 | gotplt = htab->elf.sgotplt; | |
3138 | relplt = htab->elf.srelplt; | |
3139 | } | |
3140 | else | |
3141 | { | |
3142 | plt = htab->elf.iplt; | |
3143 | gotplt = htab->elf.igotplt; | |
3144 | relplt = htab->elf.irelplt; | |
3145 | } | |
3146 | ||
3147 | /* This symbol has an entry in the procedure linkage table. Set | |
3148 | it up. */ | |
3149 | if ((h->dynindx == -1 | |
3150 | && !((h->forced_local || bfd_link_executable (info)) | |
3151 | && h->def_regular | |
3152 | && h->type == STT_GNU_IFUNC)) | |
3153 | || plt == NULL | |
3154 | || gotplt == NULL | |
3155 | || relplt == NULL) | |
cf95b909 | 3156 | abort (); |
e23eba97 NC |
3157 | |
3158 | /* Calculate the address of the PLT header. */ | |
02dd9d25 | 3159 | header_address = sec_addr (plt); |
e23eba97 | 3160 | |
02dd9d25 NC |
3161 | /* Calculate the index of the entry and the offset of .got.plt entry. |
3162 | For static executables, we don't reserve anything. */ | |
3163 | if (plt == htab->elf.splt) | |
3164 | { | |
3165 | plt_idx = (h->plt.offset - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE; | |
3166 | got_offset = GOTPLT_HEADER_SIZE + (plt_idx * GOT_ENTRY_SIZE); | |
3167 | } | |
3168 | else | |
3169 | { | |
3170 | plt_idx = h->plt.offset / PLT_ENTRY_SIZE; | |
3171 | got_offset = plt_idx * GOT_ENTRY_SIZE; | |
3172 | } | |
e23eba97 NC |
3173 | |
3174 | /* Calculate the address of the .got.plt entry. */ | |
02dd9d25 | 3175 | got_address = sec_addr (gotplt) + got_offset; |
e23eba97 NC |
3176 | |
3177 | /* Find out where the .plt entry should go. */ | |
02dd9d25 | 3178 | loc = plt->contents + h->plt.offset; |
e23eba97 NC |
3179 | |
3180 | /* Fill in the PLT entry itself. */ | |
5ef23793 JW |
3181 | if (! riscv_make_plt_entry (output_bfd, got_address, |
3182 | header_address + h->plt.offset, | |
3183 | plt_entry)) | |
0a1b45a2 | 3184 | return false; |
5ef23793 | 3185 | |
e23eba97 | 3186 | for (i = 0; i < PLT_ENTRY_INSNS; i++) |
fbc09e7a | 3187 | bfd_putl32 (plt_entry[i], loc + 4*i); |
e23eba97 NC |
3188 | |
3189 | /* Fill in the initial value of the .got.plt entry. */ | |
02dd9d25 NC |
3190 | loc = gotplt->contents + (got_address - sec_addr (gotplt)); |
3191 | bfd_put_NN (output_bfd, sec_addr (plt), loc); | |
e23eba97 | 3192 | |
e23eba97 | 3193 | rela.r_offset = got_address; |
e23eba97 | 3194 | |
02dd9d25 NC |
3195 | if (h->dynindx == -1 |
3196 | || ((bfd_link_executable (info) | |
3197 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
3198 | && h->def_regular | |
3199 | && h->type == STT_GNU_IFUNC)) | |
3200 | { | |
3201 | info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"), | |
3202 | h->root.root.string, | |
3203 | h->root.u.def.section->owner); | |
3204 | ||
3205 | /* If an STT_GNU_IFUNC symbol is locally defined, generate | |
3206 | R_RISCV_IRELATIVE instead of R_RISCV_JUMP_SLOT. */ | |
3207 | asection *sec = h->root.u.def.section; | |
3208 | rela.r_info = ELFNN_R_INFO (0, R_RISCV_IRELATIVE); | |
3209 | rela.r_addend = h->root.u.def.value | |
3210 | + sec->output_section->vma | |
3211 | + sec->output_offset; | |
3212 | } | |
3213 | else | |
3214 | { | |
3215 | /* Fill in the entry in the .rela.plt section. */ | |
3216 | rela.r_info = ELFNN_R_INFO (h->dynindx, R_RISCV_JUMP_SLOT); | |
3217 | rela.r_addend = 0; | |
3218 | } | |
3219 | ||
3220 | loc = relplt->contents + plt_idx * sizeof (ElfNN_External_Rela); | |
e23eba97 NC |
3221 | bed->s->swap_reloca_out (output_bfd, &rela, loc); |
3222 | ||
3223 | if (!h->def_regular) | |
3224 | { | |
3225 | /* Mark the symbol as undefined, rather than as defined in | |
3226 | the .plt section. Leave the value alone. */ | |
3227 | sym->st_shndx = SHN_UNDEF; | |
3228 | /* If the symbol is weak, we do need to clear the value. | |
3229 | Otherwise, the PLT entry would provide a definition for | |
3230 | the symbol even if the symbol wasn't defined anywhere, | |
3231 | and so the symbol would never be NULL. */ | |
3232 | if (!h->ref_regular_nonweak) | |
3233 | sym->st_value = 0; | |
3234 | } | |
3235 | } | |
3236 | ||
3237 | if (h->got.offset != (bfd_vma) -1 | |
6487709f JW |
3238 | && !(riscv_elf_hash_entry (h)->tls_type & (GOT_TLS_GD | GOT_TLS_IE)) |
3239 | && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)) | |
e23eba97 NC |
3240 | { |
3241 | asection *sgot; | |
3242 | asection *srela; | |
3243 | Elf_Internal_Rela rela; | |
0a1b45a2 | 3244 | bool use_elf_append_rela = true; |
e23eba97 NC |
3245 | |
3246 | /* This symbol has an entry in the GOT. Set it up. */ | |
3247 | ||
3248 | sgot = htab->elf.sgot; | |
3249 | srela = htab->elf.srelgot; | |
3250 | BFD_ASSERT (sgot != NULL && srela != NULL); | |
3251 | ||
3252 | rela.r_offset = sec_addr (sgot) + (h->got.offset &~ (bfd_vma) 1); | |
3253 | ||
02dd9d25 NC |
3254 | /* Handle the ifunc symbol in GOT entry. */ |
3255 | if (h->def_regular | |
3256 | && h->type == STT_GNU_IFUNC) | |
3257 | { | |
3258 | if (h->plt.offset == (bfd_vma) -1) | |
3259 | { | |
3260 | /* STT_GNU_IFUNC is referenced without PLT. */ | |
51a8a7c2 | 3261 | |
02dd9d25 NC |
3262 | if (htab->elf.splt == NULL) |
3263 | { | |
51a8a7c2 | 3264 | /* Use .rela.iplt section to store .got relocations |
02dd9d25 NC |
3265 | in static executable. */ |
3266 | srela = htab->elf.irelplt; | |
51a8a7c2 NC |
3267 | |
3268 | /* Do not use riscv_elf_append_rela to add dynamic | |
3269 | relocs. */ | |
0a1b45a2 | 3270 | use_elf_append_rela = false; |
02dd9d25 | 3271 | } |
51a8a7c2 | 3272 | |
02dd9d25 NC |
3273 | if (SYMBOL_REFERENCES_LOCAL (info, h)) |
3274 | { | |
3275 | info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"), | |
3276 | h->root.root.string, | |
3277 | h->root.u.def.section->owner); | |
3278 | ||
3279 | rela.r_info = ELFNN_R_INFO (0, R_RISCV_IRELATIVE); | |
3280 | rela.r_addend = (h->root.u.def.value | |
3281 | + h->root.u.def.section->output_section->vma | |
3282 | + h->root.u.def.section->output_offset); | |
3283 | } | |
3284 | else | |
3285 | { | |
3286 | /* Generate R_RISCV_NN. */ | |
1942a048 | 3287 | BFD_ASSERT ((h->got.offset & 1) == 0); |
02dd9d25 NC |
3288 | BFD_ASSERT (h->dynindx != -1); |
3289 | rela.r_info = ELFNN_R_INFO (h->dynindx, R_RISCV_NN); | |
3290 | rela.r_addend = 0; | |
3291 | } | |
3292 | } | |
3293 | else if (bfd_link_pic (info)) | |
3294 | { | |
3295 | /* Generate R_RISCV_NN. */ | |
1942a048 | 3296 | BFD_ASSERT ((h->got.offset & 1) == 0); |
02dd9d25 NC |
3297 | BFD_ASSERT (h->dynindx != -1); |
3298 | rela.r_info = ELFNN_R_INFO (h->dynindx, R_RISCV_NN); | |
3299 | rela.r_addend = 0; | |
3300 | } | |
3301 | else | |
3302 | { | |
3303 | asection *plt; | |
3304 | ||
3305 | if (!h->pointer_equality_needed) | |
3306 | abort (); | |
3307 | ||
3308 | /* For non-shared object, we can't use .got.plt, which | |
3309 | contains the real function address if we need pointer | |
3310 | equality. We load the GOT entry with the PLT entry. */ | |
3311 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; | |
3312 | bfd_put_NN (output_bfd, (plt->output_section->vma | |
3313 | + plt->output_offset | |
3314 | + h->plt.offset), | |
3315 | htab->elf.sgot->contents | |
3316 | + (h->got.offset & ~(bfd_vma) 1)); | |
0a1b45a2 | 3317 | return true; |
02dd9d25 NC |
3318 | } |
3319 | } | |
02dd9d25 NC |
3320 | else if (bfd_link_pic (info) |
3321 | && SYMBOL_REFERENCES_LOCAL (info, h)) | |
e23eba97 | 3322 | { |
51a8a7c2 NC |
3323 | /* If this is a local symbol reference, we just want to emit |
3324 | a RELATIVE reloc. This can happen if it is a -Bsymbolic link, | |
3325 | or a pie link, or the symbol was forced to be local because | |
3326 | of a version file. The entry in the global offset table will | |
3327 | already have been initialized in the relocate_section function. */ | |
1942a048 | 3328 | BFD_ASSERT ((h->got.offset & 1) != 0); |
e23eba97 NC |
3329 | asection *sec = h->root.u.def.section; |
3330 | rela.r_info = ELFNN_R_INFO (0, R_RISCV_RELATIVE); | |
3331 | rela.r_addend = (h->root.u.def.value | |
3332 | + sec->output_section->vma | |
3333 | + sec->output_offset); | |
3334 | } | |
3335 | else | |
3336 | { | |
1942a048 | 3337 | BFD_ASSERT ((h->got.offset & 1) == 0); |
e23eba97 NC |
3338 | BFD_ASSERT (h->dynindx != -1); |
3339 | rela.r_info = ELFNN_R_INFO (h->dynindx, R_RISCV_NN); | |
3340 | rela.r_addend = 0; | |
3341 | } | |
3342 | ||
3343 | bfd_put_NN (output_bfd, 0, | |
3344 | sgot->contents + (h->got.offset & ~(bfd_vma) 1)); | |
51a8a7c2 NC |
3345 | |
3346 | if (use_elf_append_rela) | |
3347 | riscv_elf_append_rela (output_bfd, srela, &rela); | |
3348 | else | |
3349 | { | |
3350 | /* Use riscv_elf_append_rela to add the dynamic relocs into | |
3351 | .rela.iplt may cause the overwrite problems. Since we insert | |
3352 | the relocs for PLT didn't handle the reloc_index of .rela.iplt, | |
3353 | but the riscv_elf_append_rela adds the relocs to the place | |
3354 | that are calculated from the reloc_index (in seqential). | |
3355 | ||
3356 | One solution is that add these dynamic relocs (GOT IFUNC) | |
3357 | from the last of .rela.iplt section. */ | |
3358 | bfd_vma iplt_idx = htab->last_iplt_index--; | |
3359 | bfd_byte *loc = srela->contents | |
3360 | + iplt_idx * sizeof (ElfNN_External_Rela); | |
3361 | bed->s->swap_reloca_out (output_bfd, &rela, loc); | |
3362 | } | |
e23eba97 NC |
3363 | } |
3364 | ||
3365 | if (h->needs_copy) | |
3366 | { | |
3367 | Elf_Internal_Rela rela; | |
5474d94f | 3368 | asection *s; |
e23eba97 NC |
3369 | |
3370 | /* This symbols needs a copy reloc. Set it up. */ | |
3371 | BFD_ASSERT (h->dynindx != -1); | |
3372 | ||
3373 | rela.r_offset = sec_addr (h->root.u.def.section) + h->root.u.def.value; | |
3374 | rela.r_info = ELFNN_R_INFO (h->dynindx, R_RISCV_COPY); | |
3375 | rela.r_addend = 0; | |
afbf7e8e | 3376 | if (h->root.u.def.section == htab->elf.sdynrelro) |
5474d94f AM |
3377 | s = htab->elf.sreldynrelro; |
3378 | else | |
3379 | s = htab->elf.srelbss; | |
3380 | riscv_elf_append_rela (output_bfd, s, &rela); | |
e23eba97 NC |
3381 | } |
3382 | ||
3383 | /* Mark some specially defined symbols as absolute. */ | |
3384 | if (h == htab->elf.hdynamic | |
3385 | || (h == htab->elf.hgot || h == htab->elf.hplt)) | |
3386 | sym->st_shndx = SHN_ABS; | |
3387 | ||
0a1b45a2 | 3388 | return true; |
e23eba97 NC |
3389 | } |
3390 | ||
02dd9d25 NC |
3391 | /* Finish up local dynamic symbol handling. We set the contents of |
3392 | various dynamic sections here. */ | |
3393 | ||
1201fda6 | 3394 | static int |
02dd9d25 NC |
3395 | riscv_elf_finish_local_dynamic_symbol (void **slot, void *inf) |
3396 | { | |
3397 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) *slot; | |
3398 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
3399 | ||
3400 | return riscv_elf_finish_dynamic_symbol (info->output_bfd, info, h, NULL); | |
3401 | } | |
3402 | ||
e23eba97 NC |
3403 | /* Finish up the dynamic sections. */ |
3404 | ||
0a1b45a2 | 3405 | static bool |
e23eba97 NC |
3406 | riscv_finish_dyn (bfd *output_bfd, struct bfd_link_info *info, |
3407 | bfd *dynobj, asection *sdyn) | |
3408 | { | |
3409 | struct riscv_elf_link_hash_table *htab = riscv_elf_hash_table (info); | |
3410 | const struct elf_backend_data *bed = get_elf_backend_data (output_bfd); | |
3411 | size_t dynsize = bed->s->sizeof_dyn; | |
3412 | bfd_byte *dyncon, *dynconend; | |
3413 | ||
3414 | dynconend = sdyn->contents + sdyn->size; | |
3415 | for (dyncon = sdyn->contents; dyncon < dynconend; dyncon += dynsize) | |
3416 | { | |
3417 | Elf_Internal_Dyn dyn; | |
3418 | asection *s; | |
3419 | ||
3420 | bed->s->swap_dyn_in (dynobj, dyncon, &dyn); | |
3421 | ||
3422 | switch (dyn.d_tag) | |
3423 | { | |
3424 | case DT_PLTGOT: | |
3425 | s = htab->elf.sgotplt; | |
3426 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; | |
3427 | break; | |
3428 | case DT_JMPREL: | |
3429 | s = htab->elf.srelplt; | |
3430 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; | |
3431 | break; | |
3432 | case DT_PLTRELSZ: | |
3433 | s = htab->elf.srelplt; | |
3434 | dyn.d_un.d_val = s->size; | |
3435 | break; | |
3436 | default: | |
3437 | continue; | |
3438 | } | |
3439 | ||
3440 | bed->s->swap_dyn_out (output_bfd, &dyn, dyncon); | |
3441 | } | |
0a1b45a2 | 3442 | return true; |
e23eba97 NC |
3443 | } |
3444 | ||
0a1b45a2 | 3445 | static bool |
e23eba97 NC |
3446 | riscv_elf_finish_dynamic_sections (bfd *output_bfd, |
3447 | struct bfd_link_info *info) | |
3448 | { | |
3449 | bfd *dynobj; | |
3450 | asection *sdyn; | |
3451 | struct riscv_elf_link_hash_table *htab; | |
3452 | ||
3453 | htab = riscv_elf_hash_table (info); | |
3454 | BFD_ASSERT (htab != NULL); | |
3455 | dynobj = htab->elf.dynobj; | |
3456 | ||
3457 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); | |
3458 | ||
3459 | if (elf_hash_table (info)->dynamic_sections_created) | |
3460 | { | |
3461 | asection *splt; | |
0a1b45a2 | 3462 | bool ret; |
e23eba97 NC |
3463 | |
3464 | splt = htab->elf.splt; | |
3465 | BFD_ASSERT (splt != NULL && sdyn != NULL); | |
3466 | ||
3467 | ret = riscv_finish_dyn (output_bfd, info, dynobj, sdyn); | |
3468 | ||
535b785f | 3469 | if (!ret) |
e23eba97 NC |
3470 | return ret; |
3471 | ||
3472 | /* Fill in the head and tail entries in the procedure linkage table. */ | |
3473 | if (splt->size > 0) | |
3474 | { | |
3475 | int i; | |
3476 | uint32_t plt_header[PLT_HEADER_INSNS]; | |
5ef23793 JW |
3477 | ret = riscv_make_plt_header (output_bfd, |
3478 | sec_addr (htab->elf.sgotplt), | |
3479 | sec_addr (splt), plt_header); | |
3480 | if (!ret) | |
3481 | return ret; | |
e23eba97 NC |
3482 | |
3483 | for (i = 0; i < PLT_HEADER_INSNS; i++) | |
fbc09e7a | 3484 | bfd_putl32 (plt_header[i], splt->contents + 4*i); |
e23eba97 | 3485 | |
cc162427 AW |
3486 | elf_section_data (splt->output_section)->this_hdr.sh_entsize |
3487 | = PLT_ENTRY_SIZE; | |
3488 | } | |
e23eba97 NC |
3489 | } |
3490 | ||
3491 | if (htab->elf.sgotplt) | |
3492 | { | |
3493 | asection *output_section = htab->elf.sgotplt->output_section; | |
3494 | ||
3495 | if (bfd_is_abs_section (output_section)) | |
3496 | { | |
3497 | (*_bfd_error_handler) | |
871b3ab2 | 3498 | (_("discarded output section: `%pA'"), htab->elf.sgotplt); |
0a1b45a2 | 3499 | return false; |
e23eba97 NC |
3500 | } |
3501 | ||
3502 | if (htab->elf.sgotplt->size > 0) | |
3503 | { | |
3504 | /* Write the first two entries in .got.plt, needed for the dynamic | |
3505 | linker. */ | |
3506 | bfd_put_NN (output_bfd, (bfd_vma) -1, htab->elf.sgotplt->contents); | |
3507 | bfd_put_NN (output_bfd, (bfd_vma) 0, | |
3508 | htab->elf.sgotplt->contents + GOT_ENTRY_SIZE); | |
3509 | } | |
3510 | ||
3511 | elf_section_data (output_section)->this_hdr.sh_entsize = GOT_ENTRY_SIZE; | |
3512 | } | |
3513 | ||
3514 | if (htab->elf.sgot) | |
3515 | { | |
3516 | asection *output_section = htab->elf.sgot->output_section; | |
3517 | ||
3518 | if (htab->elf.sgot->size > 0) | |
3519 | { | |
3520 | /* Set the first entry in the global offset table to the address of | |
3521 | the dynamic section. */ | |
3522 | bfd_vma val = sdyn ? sec_addr (sdyn) : 0; | |
3523 | bfd_put_NN (output_bfd, val, htab->elf.sgot->contents); | |
3524 | } | |
3525 | ||
3526 | elf_section_data (output_section)->this_hdr.sh_entsize = GOT_ENTRY_SIZE; | |
3527 | } | |
3528 | ||
02dd9d25 NC |
3529 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ |
3530 | htab_traverse (htab->loc_hash_table, | |
3531 | riscv_elf_finish_local_dynamic_symbol, | |
3532 | info); | |
3533 | ||
0a1b45a2 | 3534 | return true; |
e23eba97 NC |
3535 | } |
3536 | ||
3537 | /* Return address for Ith PLT stub in section PLT, for relocation REL | |
3538 | or (bfd_vma) -1 if it should not be included. */ | |
3539 | ||
3540 | static bfd_vma | |
3541 | riscv_elf_plt_sym_val (bfd_vma i, const asection *plt, | |
3542 | const arelent *rel ATTRIBUTE_UNUSED) | |
3543 | { | |
3544 | return plt->vma + PLT_HEADER_SIZE + i * PLT_ENTRY_SIZE; | |
3545 | } | |
3546 | ||
3547 | static enum elf_reloc_type_class | |
3548 | riscv_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
3549 | const asection *rel_sec ATTRIBUTE_UNUSED, | |
3550 | const Elf_Internal_Rela *rela) | |
3551 | { | |
3552 | switch (ELFNN_R_TYPE (rela->r_info)) | |
3553 | { | |
3554 | case R_RISCV_RELATIVE: | |
3555 | return reloc_class_relative; | |
3556 | case R_RISCV_JUMP_SLOT: | |
3557 | return reloc_class_plt; | |
3558 | case R_RISCV_COPY: | |
3559 | return reloc_class_copy; | |
3560 | default: | |
3561 | return reloc_class_normal; | |
3562 | } | |
3563 | } | |
3564 | ||
0242af40 JW |
3565 | /* Given the ELF header flags in FLAGS, it returns a string that describes the |
3566 | float ABI. */ | |
3567 | ||
3568 | static const char * | |
3569 | riscv_float_abi_string (flagword flags) | |
3570 | { | |
3571 | switch (flags & EF_RISCV_FLOAT_ABI) | |
3572 | { | |
3573 | case EF_RISCV_FLOAT_ABI_SOFT: | |
3574 | return "soft-float"; | |
3575 | break; | |
3576 | case EF_RISCV_FLOAT_ABI_SINGLE: | |
3577 | return "single-float"; | |
3578 | break; | |
3579 | case EF_RISCV_FLOAT_ABI_DOUBLE: | |
3580 | return "double-float"; | |
3581 | break; | |
3582 | case EF_RISCV_FLOAT_ABI_QUAD: | |
3583 | return "quad-float"; | |
3584 | break; | |
3585 | default: | |
3586 | abort (); | |
3587 | } | |
3588 | } | |
3589 | ||
dcd709e0 | 3590 | /* The information of architecture elf attributes. */ |
7d7a7d7c JW |
3591 | static riscv_subset_list_t in_subsets; |
3592 | static riscv_subset_list_t out_subsets; | |
3593 | static riscv_subset_list_t merged_subsets; | |
3594 | ||
3595 | /* Predicator for standard extension. */ | |
3596 | ||
0a1b45a2 | 3597 | static bool |
7d7a7d7c JW |
3598 | riscv_std_ext_p (const char *name) |
3599 | { | |
3600 | return (strlen (name) == 1) && (name[0] != 'x') && (name[0] != 's'); | |
3601 | } | |
3602 | ||
87fdd7ac PD |
3603 | /* Update the output subset's version to match the input when the input |
3604 | subset's version is newer. */ | |
7d7a7d7c | 3605 | |
87fdd7ac PD |
3606 | static void |
3607 | riscv_update_subset_version (struct riscv_subset_t *in, | |
3608 | struct riscv_subset_t *out) | |
7d7a7d7c | 3609 | { |
32f0ce4d | 3610 | if (in == NULL || out == NULL) |
87fdd7ac PD |
3611 | return; |
3612 | ||
3613 | /* Update the output ISA versions to the newest ones, but otherwise don't | |
3614 | provide any errors or warnings about mis-matched ISA versions as it's | |
3615 | generally too tricky to check for these at link time. */ | |
3616 | if ((in->major_version > out->major_version) | |
3617 | || (in->major_version == out->major_version | |
3618 | && in->minor_version > out->minor_version) | |
3619 | || (out->major_version == RISCV_UNKNOWN_VERSION)) | |
32f0ce4d | 3620 | { |
87fdd7ac PD |
3621 | out->major_version = in->major_version; |
3622 | out->minor_version = in->minor_version; | |
32f0ce4d | 3623 | } |
7d7a7d7c JW |
3624 | } |
3625 | ||
3626 | /* Return true if subset is 'i' or 'e'. */ | |
3627 | ||
0a1b45a2 | 3628 | static bool |
7d7a7d7c JW |
3629 | riscv_i_or_e_p (bfd *ibfd, |
3630 | const char *arch, | |
3631 | struct riscv_subset_t *subset) | |
3632 | { | |
3633 | if ((strcasecmp (subset->name, "e") != 0) | |
3634 | && (strcasecmp (subset->name, "i") != 0)) | |
3635 | { | |
3636 | _bfd_error_handler | |
9184ef8a NC |
3637 | (_("error: %pB: corrupted ISA string '%s'. " |
3638 | "First letter should be 'i' or 'e' but got '%s'"), | |
7d7a7d7c | 3639 | ibfd, arch, subset->name); |
0a1b45a2 | 3640 | return false; |
7d7a7d7c | 3641 | } |
0a1b45a2 | 3642 | return true; |
7d7a7d7c JW |
3643 | } |
3644 | ||
3645 | /* Merge standard extensions. | |
3646 | ||
3647 | Return Value: | |
3648 | Return FALSE if failed to merge. | |
3649 | ||
3650 | Arguments: | |
3651 | `bfd`: bfd handler. | |
dcd709e0 NC |
3652 | `in_arch`: Raw ISA string for input object. |
3653 | `out_arch`: Raw ISA string for output object. | |
3654 | `pin`: Subset list for input object. | |
3655 | `pout`: Subset list for output object. */ | |
7d7a7d7c | 3656 | |
0a1b45a2 | 3657 | static bool |
7d7a7d7c JW |
3658 | riscv_merge_std_ext (bfd *ibfd, |
3659 | const char *in_arch, | |
3660 | const char *out_arch, | |
3661 | struct riscv_subset_t **pin, | |
3662 | struct riscv_subset_t **pout) | |
3663 | { | |
c341f467 | 3664 | const char *standard_exts = "mafdqlcbjtpvnh"; |
7d7a7d7c JW |
3665 | const char *p; |
3666 | struct riscv_subset_t *in = *pin; | |
3667 | struct riscv_subset_t *out = *pout; | |
3668 | ||
3669 | /* First letter should be 'i' or 'e'. */ | |
3670 | if (!riscv_i_or_e_p (ibfd, in_arch, in)) | |
0a1b45a2 | 3671 | return false; |
7d7a7d7c JW |
3672 | |
3673 | if (!riscv_i_or_e_p (ibfd, out_arch, out)) | |
0a1b45a2 | 3674 | return false; |
7d7a7d7c | 3675 | |
8f595e9b | 3676 | if (strcasecmp (in->name, out->name) != 0) |
7d7a7d7c JW |
3677 | { |
3678 | /* TODO: We might allow merge 'i' with 'e'. */ | |
3679 | _bfd_error_handler | |
9184ef8a | 3680 | (_("error: %pB: mis-matched ISA string to merge '%s' and '%s'"), |
7d7a7d7c | 3681 | ibfd, in->name, out->name); |
0a1b45a2 | 3682 | return false; |
7d7a7d7c | 3683 | } |
87fdd7ac PD |
3684 | |
3685 | riscv_update_subset_version(in, out); | |
3686 | riscv_add_subset (&merged_subsets, | |
3687 | out->name, out->major_version, out->minor_version); | |
7d7a7d7c JW |
3688 | |
3689 | in = in->next; | |
3690 | out = out->next; | |
3691 | ||
3692 | /* Handle standard extension first. */ | |
3693 | for (p = standard_exts; *p; ++p) | |
3694 | { | |
dfe92496 | 3695 | struct riscv_subset_t *ext_in, *ext_out, *ext_merged; |
7d7a7d7c | 3696 | char find_ext[2] = {*p, '\0'}; |
0a1b45a2 | 3697 | bool find_in, find_out; |
7d7a7d7c | 3698 | |
dfe92496 NC |
3699 | find_in = riscv_lookup_subset (&in_subsets, find_ext, &ext_in); |
3700 | find_out = riscv_lookup_subset (&out_subsets, find_ext, &ext_out); | |
3701 | ||
3702 | if (!find_in && !find_out) | |
7d7a7d7c JW |
3703 | continue; |
3704 | ||
87fdd7ac PD |
3705 | if (find_in && find_out) |
3706 | riscv_update_subset_version(ext_in, ext_out); | |
7d7a7d7c | 3707 | |
dfe92496 NC |
3708 | ext_merged = find_out ? ext_out : ext_in; |
3709 | riscv_add_subset (&merged_subsets, ext_merged->name, | |
3710 | ext_merged->major_version, ext_merged->minor_version); | |
7d7a7d7c JW |
3711 | } |
3712 | ||
3713 | /* Skip all standard extensions. */ | |
3714 | while ((in != NULL) && riscv_std_ext_p (in->name)) in = in->next; | |
3715 | while ((out != NULL) && riscv_std_ext_p (out->name)) out = out->next; | |
3716 | ||
3717 | *pin = in; | |
3718 | *pout = out; | |
3719 | ||
0a1b45a2 | 3720 | return true; |
7d7a7d7c JW |
3721 | } |
3722 | ||
403d1bd9 JW |
3723 | /* Merge multi letter extensions. PIN is a pointer to the head of the input |
3724 | object subset list. Likewise for POUT and the output object. Return TRUE | |
3725 | on success and FALSE when a conflict is found. */ | |
7d7a7d7c | 3726 | |
0a1b45a2 | 3727 | static bool |
87fdd7ac | 3728 | riscv_merge_multi_letter_ext (riscv_subset_t **pin, |
403d1bd9 | 3729 | riscv_subset_t **pout) |
7d7a7d7c JW |
3730 | { |
3731 | riscv_subset_t *in = *pin; | |
3732 | riscv_subset_t *out = *pout; | |
403d1bd9 | 3733 | riscv_subset_t *tail; |
7d7a7d7c | 3734 | |
403d1bd9 | 3735 | int cmp; |
7d7a7d7c | 3736 | |
403d1bd9 | 3737 | while (in && out) |
7d7a7d7c | 3738 | { |
4c0e540e | 3739 | cmp = riscv_compare_subsets (in->name, out->name); |
403d1bd9 JW |
3740 | |
3741 | if (cmp < 0) | |
3742 | { | |
3743 | /* `in' comes before `out', append `in' and increment. */ | |
3744 | riscv_add_subset (&merged_subsets, in->name, in->major_version, | |
3745 | in->minor_version); | |
3746 | in = in->next; | |
3747 | } | |
3748 | else if (cmp > 0) | |
3749 | { | |
3750 | /* `out' comes before `in', append `out' and increment. */ | |
3751 | riscv_add_subset (&merged_subsets, out->name, out->major_version, | |
3752 | out->minor_version); | |
3753 | out = out->next; | |
3754 | } | |
3755 | else | |
7d7a7d7c | 3756 | { |
403d1bd9 | 3757 | /* Both present, check version and increment both. */ |
87fdd7ac | 3758 | riscv_update_subset_version (in, out); |
403d1bd9 JW |
3759 | |
3760 | riscv_add_subset (&merged_subsets, out->name, out->major_version, | |
3761 | out->minor_version); | |
3762 | out = out->next; | |
3763 | in = in->next; | |
7d7a7d7c | 3764 | } |
7d7a7d7c JW |
3765 | } |
3766 | ||
1942a048 NC |
3767 | if (in || out) |
3768 | { | |
3769 | /* If we're here, either `in' or `out' is running longer than | |
3770 | the other. So, we need to append the corresponding tail. */ | |
3771 | tail = in ? in : out; | |
3772 | while (tail) | |
3773 | { | |
3774 | riscv_add_subset (&merged_subsets, tail->name, tail->major_version, | |
3775 | tail->minor_version); | |
3776 | tail = tail->next; | |
3777 | } | |
3778 | } | |
403d1bd9 | 3779 | |
0a1b45a2 | 3780 | return true; |
7d7a7d7c JW |
3781 | } |
3782 | ||
3783 | /* Merge Tag_RISCV_arch attribute. */ | |
3784 | ||
3785 | static char * | |
3786 | riscv_merge_arch_attr_info (bfd *ibfd, char *in_arch, char *out_arch) | |
3787 | { | |
3788 | riscv_subset_t *in, *out; | |
3789 | char *merged_arch_str; | |
3790 | ||
3791 | unsigned xlen_in, xlen_out; | |
3792 | merged_subsets.head = NULL; | |
3793 | merged_subsets.tail = NULL; | |
3794 | ||
f786c359 NC |
3795 | riscv_parse_subset_t riscv_rps_ld_in = |
3796 | {&in_subsets, _bfd_error_handler, &xlen_in, NULL, false}; | |
3797 | riscv_parse_subset_t riscv_rps_ld_out = | |
3798 | {&out_subsets, _bfd_error_handler, &xlen_out, NULL, false}; | |
7d7a7d7c JW |
3799 | |
3800 | if (in_arch == NULL && out_arch == NULL) | |
3801 | return NULL; | |
7d7a7d7c JW |
3802 | if (in_arch == NULL && out_arch != NULL) |
3803 | return out_arch; | |
7d7a7d7c JW |
3804 | if (in_arch != NULL && out_arch == NULL) |
3805 | return in_arch; | |
3806 | ||
dcd709e0 | 3807 | /* Parse subset from ISA string. */ |
f786c359 | 3808 | if (!riscv_parse_subset (&riscv_rps_ld_in, in_arch)) |
7d7a7d7c | 3809 | return NULL; |
f786c359 | 3810 | if (!riscv_parse_subset (&riscv_rps_ld_out, out_arch)) |
7d7a7d7c JW |
3811 | return NULL; |
3812 | ||
3813 | /* Checking XLEN. */ | |
3814 | if (xlen_out != xlen_in) | |
3815 | { | |
3816 | _bfd_error_handler | |
3817 | (_("error: %pB: ISA string of input (%s) doesn't match " | |
9184ef8a | 3818 | "output (%s)"), ibfd, in_arch, out_arch); |
7d7a7d7c JW |
3819 | return NULL; |
3820 | } | |
3821 | ||
3822 | /* Merge subset list. */ | |
3823 | in = in_subsets.head; | |
3824 | out = out_subsets.head; | |
3825 | ||
3826 | /* Merge standard extension. */ | |
3827 | if (!riscv_merge_std_ext (ibfd, in_arch, out_arch, &in, &out)) | |
3828 | return NULL; | |
403d1bd9 JW |
3829 | |
3830 | /* Merge all non-single letter extensions with single call. */ | |
87fdd7ac | 3831 | if (!riscv_merge_multi_letter_ext (&in, &out)) |
7d7a7d7c JW |
3832 | return NULL; |
3833 | ||
3834 | if (xlen_in != xlen_out) | |
3835 | { | |
3836 | _bfd_error_handler | |
3837 | (_("error: %pB: XLEN of input (%u) doesn't match " | |
9184ef8a | 3838 | "output (%u)"), ibfd, xlen_in, xlen_out); |
7d7a7d7c JW |
3839 | return NULL; |
3840 | } | |
3841 | ||
3842 | if (xlen_in != ARCH_SIZE) | |
3843 | { | |
3844 | _bfd_error_handler | |
9184ef8a NC |
3845 | (_("error: %pB: unsupported XLEN (%u), you might be " |
3846 | "using wrong emulation"), ibfd, xlen_in); | |
7d7a7d7c JW |
3847 | return NULL; |
3848 | } | |
3849 | ||
3850 | merged_arch_str = riscv_arch_str (ARCH_SIZE, &merged_subsets); | |
3851 | ||
3852 | /* Release the subset lists. */ | |
3853 | riscv_release_subset_list (&in_subsets); | |
3854 | riscv_release_subset_list (&out_subsets); | |
3855 | riscv_release_subset_list (&merged_subsets); | |
3856 | ||
3857 | return merged_arch_str; | |
3858 | } | |
3859 | ||
3860 | /* Merge object attributes from IBFD into output_bfd of INFO. | |
3861 | Raise an error if there are conflicting attributes. */ | |
3862 | ||
0a1b45a2 | 3863 | static bool |
7d7a7d7c JW |
3864 | riscv_merge_attributes (bfd *ibfd, struct bfd_link_info *info) |
3865 | { | |
3866 | bfd *obfd = info->output_bfd; | |
3867 | obj_attribute *in_attr; | |
3868 | obj_attribute *out_attr; | |
0a1b45a2 AM |
3869 | bool result = true; |
3870 | bool priv_attrs_merged = false; | |
7d7a7d7c JW |
3871 | const char *sec_name = get_elf_backend_data (ibfd)->obj_attrs_section; |
3872 | unsigned int i; | |
3873 | ||
3874 | /* Skip linker created files. */ | |
3875 | if (ibfd->flags & BFD_LINKER_CREATED) | |
0a1b45a2 | 3876 | return true; |
7d7a7d7c JW |
3877 | |
3878 | /* Skip any input that doesn't have an attribute section. | |
3879 | This enables to link object files without attribute section with | |
3880 | any others. */ | |
3881 | if (bfd_get_section_by_name (ibfd, sec_name) == NULL) | |
0a1b45a2 | 3882 | return true; |
7d7a7d7c JW |
3883 | |
3884 | if (!elf_known_obj_attributes_proc (obfd)[0].i) | |
3885 | { | |
3886 | /* This is the first object. Copy the attributes. */ | |
3887 | _bfd_elf_copy_obj_attributes (ibfd, obfd); | |
3888 | ||
3889 | out_attr = elf_known_obj_attributes_proc (obfd); | |
3890 | ||
3891 | /* Use the Tag_null value to indicate the attributes have been | |
3892 | initialized. */ | |
3893 | out_attr[0].i = 1; | |
3894 | ||
0a1b45a2 | 3895 | return true; |
7d7a7d7c JW |
3896 | } |
3897 | ||
3898 | in_attr = elf_known_obj_attributes_proc (ibfd); | |
3899 | out_attr = elf_known_obj_attributes_proc (obfd); | |
3900 | ||
3901 | for (i = LEAST_KNOWN_OBJ_ATTRIBUTE; i < NUM_KNOWN_OBJ_ATTRIBUTES; i++) | |
3902 | { | |
3903 | switch (i) | |
3904 | { | |
3905 | case Tag_RISCV_arch: | |
3906 | if (!out_attr[Tag_RISCV_arch].s) | |
3907 | out_attr[Tag_RISCV_arch].s = in_attr[Tag_RISCV_arch].s; | |
3908 | else if (in_attr[Tag_RISCV_arch].s | |
3909 | && out_attr[Tag_RISCV_arch].s) | |
3910 | { | |
dcd709e0 | 3911 | /* Check compatible. */ |
7d7a7d7c JW |
3912 | char *merged_arch = |
3913 | riscv_merge_arch_attr_info (ibfd, | |
3914 | in_attr[Tag_RISCV_arch].s, | |
3915 | out_attr[Tag_RISCV_arch].s); | |
3916 | if (merged_arch == NULL) | |
3917 | { | |
0a1b45a2 | 3918 | result = false; |
7d7a7d7c JW |
3919 | out_attr[Tag_RISCV_arch].s = ""; |
3920 | } | |
3921 | else | |
3922 | out_attr[Tag_RISCV_arch].s = merged_arch; | |
3923 | } | |
3924 | break; | |
41285764 | 3925 | |
7d7a7d7c JW |
3926 | case Tag_RISCV_priv_spec: |
3927 | case Tag_RISCV_priv_spec_minor: | |
3928 | case Tag_RISCV_priv_spec_revision: | |
dcd709e0 | 3929 | /* If we have handled the privileged elf attributes, then skip it. */ |
cbd7581f | 3930 | if (!priv_attrs_merged) |
41285764 | 3931 | { |
cbd7581f NC |
3932 | unsigned int Tag_a = Tag_RISCV_priv_spec; |
3933 | unsigned int Tag_b = Tag_RISCV_priv_spec_minor; | |
3934 | unsigned int Tag_c = Tag_RISCV_priv_spec_revision; | |
3d73d29e NC |
3935 | enum riscv_spec_class in_priv_spec = PRIV_SPEC_CLASS_NONE; |
3936 | enum riscv_spec_class out_priv_spec = PRIV_SPEC_CLASS_NONE; | |
39ff0b81 | 3937 | |
dcd709e0 | 3938 | /* Get the privileged spec class from elf attributes. */ |
39ff0b81 NC |
3939 | riscv_get_priv_spec_class_from_numbers (in_attr[Tag_a].i, |
3940 | in_attr[Tag_b].i, | |
3941 | in_attr[Tag_c].i, | |
3942 | &in_priv_spec); | |
3943 | riscv_get_priv_spec_class_from_numbers (out_attr[Tag_a].i, | |
3944 | out_attr[Tag_b].i, | |
3945 | out_attr[Tag_c].i, | |
3946 | &out_priv_spec); | |
cbd7581f | 3947 | |
dcd709e0 | 3948 | /* Allow to link the object without the privileged specs. */ |
39ff0b81 | 3949 | if (out_priv_spec == PRIV_SPEC_CLASS_NONE) |
cbd7581f NC |
3950 | { |
3951 | out_attr[Tag_a].i = in_attr[Tag_a].i; | |
3952 | out_attr[Tag_b].i = in_attr[Tag_b].i; | |
3953 | out_attr[Tag_c].i = in_attr[Tag_c].i; | |
3954 | } | |
39ff0b81 NC |
3955 | else if (in_priv_spec != PRIV_SPEC_CLASS_NONE |
3956 | && in_priv_spec != out_priv_spec) | |
cbd7581f NC |
3957 | { |
3958 | _bfd_error_handler | |
b800637e | 3959 | (_("warning: %pB use privileged spec version %u.%u.%u but " |
9184ef8a | 3960 | "the output use version %u.%u.%u"), |
cbd7581f NC |
3961 | ibfd, |
3962 | in_attr[Tag_a].i, | |
3963 | in_attr[Tag_b].i, | |
3964 | in_attr[Tag_c].i, | |
3965 | out_attr[Tag_a].i, | |
3966 | out_attr[Tag_b].i, | |
3967 | out_attr[Tag_c].i); | |
39ff0b81 | 3968 | |
dcd709e0 NC |
3969 | /* The privileged spec v1.9.1 can not be linked with others |
3970 | since the conflicts, so we plan to drop it in a year or | |
3971 | two. */ | |
39ff0b81 NC |
3972 | if (in_priv_spec == PRIV_SPEC_CLASS_1P9P1 |
3973 | || out_priv_spec == PRIV_SPEC_CLASS_1P9P1) | |
3974 | { | |
3975 | _bfd_error_handler | |
b800637e | 3976 | (_("warning: privileged spec version 1.9.1 can not be " |
9184ef8a | 3977 | "linked with other spec versions")); |
39ff0b81 NC |
3978 | } |
3979 | ||
dcd709e0 | 3980 | /* Update the output privileged spec to the newest one. */ |
39ff0b81 NC |
3981 | if (in_priv_spec > out_priv_spec) |
3982 | { | |
3983 | out_attr[Tag_a].i = in_attr[Tag_a].i; | |
3984 | out_attr[Tag_b].i = in_attr[Tag_b].i; | |
3985 | out_attr[Tag_c].i = in_attr[Tag_c].i; | |
3986 | } | |
cbd7581f | 3987 | } |
0a1b45a2 | 3988 | priv_attrs_merged = true; |
7d7a7d7c JW |
3989 | } |
3990 | break; | |
41285764 | 3991 | |
7d7a7d7c JW |
3992 | case Tag_RISCV_unaligned_access: |
3993 | out_attr[i].i |= in_attr[i].i; | |
3994 | break; | |
41285764 | 3995 | |
7d7a7d7c JW |
3996 | case Tag_RISCV_stack_align: |
3997 | if (out_attr[i].i == 0) | |
3998 | out_attr[i].i = in_attr[i].i; | |
3999 | else if (in_attr[i].i != 0 | |
4000 | && out_attr[i].i != 0 | |
4001 | && out_attr[i].i != in_attr[i].i) | |
4002 | { | |
4003 | _bfd_error_handler | |
4004 | (_("error: %pB use %u-byte stack aligned but the output " | |
9184ef8a | 4005 | "use %u-byte stack aligned"), |
7d7a7d7c | 4006 | ibfd, in_attr[i].i, out_attr[i].i); |
0a1b45a2 | 4007 | result = false; |
7d7a7d7c JW |
4008 | } |
4009 | break; | |
41285764 | 4010 | |
7d7a7d7c JW |
4011 | default: |
4012 | result &= _bfd_elf_merge_unknown_attribute_low (ibfd, obfd, i); | |
4013 | } | |
4014 | ||
4015 | /* If out_attr was copied from in_attr then it won't have a type yet. */ | |
4016 | if (in_attr[i].type && !out_attr[i].type) | |
4017 | out_attr[i].type = in_attr[i].type; | |
4018 | } | |
4019 | ||
4020 | /* Merge Tag_compatibility attributes and any common GNU ones. */ | |
4021 | if (!_bfd_elf_merge_object_attributes (ibfd, info)) | |
0a1b45a2 | 4022 | return false; |
7d7a7d7c JW |
4023 | |
4024 | /* Check for any attributes not known on RISC-V. */ | |
4025 | result &= _bfd_elf_merge_unknown_attribute_list (ibfd, obfd); | |
4026 | ||
4027 | return result; | |
4028 | } | |
4029 | ||
e23eba97 NC |
4030 | /* Merge backend specific data from an object file to the output |
4031 | object file when linking. */ | |
4032 | ||
0a1b45a2 | 4033 | static bool |
e23eba97 NC |
4034 | _bfd_riscv_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) |
4035 | { | |
4036 | bfd *obfd = info->output_bfd; | |
87f98bac | 4037 | flagword new_flags, old_flags; |
e23eba97 NC |
4038 | |
4039 | if (!is_riscv_elf (ibfd) || !is_riscv_elf (obfd)) | |
0a1b45a2 | 4040 | return true; |
e23eba97 NC |
4041 | |
4042 | if (strcmp (bfd_get_target (ibfd), bfd_get_target (obfd)) != 0) | |
4043 | { | |
4044 | (*_bfd_error_handler) | |
871b3ab2 | 4045 | (_("%pB: ABI is incompatible with that of the selected emulation:\n" |
96b0927d PD |
4046 | " target emulation `%s' does not match `%s'"), |
4047 | ibfd, bfd_get_target (ibfd), bfd_get_target (obfd)); | |
0a1b45a2 | 4048 | return false; |
e23eba97 NC |
4049 | } |
4050 | ||
4051 | if (!_bfd_elf_merge_object_attributes (ibfd, info)) | |
0a1b45a2 | 4052 | return false; |
e23eba97 | 4053 | |
7d7a7d7c | 4054 | if (!riscv_merge_attributes (ibfd, info)) |
0a1b45a2 | 4055 | return false; |
7d7a7d7c | 4056 | |
87f98bac JW |
4057 | /* Check to see if the input BFD actually contains any sections. If not, |
4058 | its flags may not have been initialized either, but it cannot actually | |
4059 | cause any incompatibility. Do not short-circuit dynamic objects; their | |
4060 | section list may be emptied by elf_link_add_object_symbols. | |
4061 | ||
4062 | Also check to see if there are no code sections in the input. In this | |
4063 | case, there is no need to check for code specific flags. */ | |
4064 | if (!(ibfd->flags & DYNAMIC)) | |
4065 | { | |
0a1b45a2 AM |
4066 | bool null_input_bfd = true; |
4067 | bool only_data_sections = true; | |
87f98bac JW |
4068 | asection *sec; |
4069 | ||
4070 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) | |
4071 | { | |
0a1b45a2 | 4072 | null_input_bfd = false; |
0d6aab77 | 4073 | |
fd361982 | 4074 | if ((bfd_section_flags (sec) |
87f98bac JW |
4075 | & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) |
4076 | == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) | |
0d6aab77 | 4077 | { |
0a1b45a2 | 4078 | only_data_sections = false; |
0d6aab77 NC |
4079 | break; |
4080 | } | |
87f98bac JW |
4081 | } |
4082 | ||
4083 | if (null_input_bfd || only_data_sections) | |
0a1b45a2 | 4084 | return true; |
87f98bac JW |
4085 | } |
4086 | ||
0d6aab77 NC |
4087 | new_flags = elf_elfheader (ibfd)->e_flags; |
4088 | old_flags = elf_elfheader (obfd)->e_flags; | |
4089 | ||
4090 | if (!elf_flags_init (obfd)) | |
4091 | { | |
0a1b45a2 | 4092 | elf_flags_init (obfd) = true; |
0d6aab77 | 4093 | elf_elfheader (obfd)->e_flags = new_flags; |
0a1b45a2 | 4094 | return true; |
0d6aab77 NC |
4095 | } |
4096 | ||
2922d21d AW |
4097 | /* Disallow linking different float ABIs. */ |
4098 | if ((old_flags ^ new_flags) & EF_RISCV_FLOAT_ABI) | |
e23eba97 NC |
4099 | { |
4100 | (*_bfd_error_handler) | |
0242af40 JW |
4101 | (_("%pB: can't link %s modules with %s modules"), ibfd, |
4102 | riscv_float_abi_string (new_flags), | |
4103 | riscv_float_abi_string (old_flags)); | |
e23eba97 NC |
4104 | goto fail; |
4105 | } | |
4106 | ||
7f999549 JW |
4107 | /* Disallow linking RVE and non-RVE. */ |
4108 | if ((old_flags ^ new_flags) & EF_RISCV_RVE) | |
4109 | { | |
4110 | (*_bfd_error_handler) | |
4111 | (_("%pB: can't link RVE with other target"), ibfd); | |
4112 | goto fail; | |
4113 | } | |
4114 | ||
e23eba97 NC |
4115 | /* Allow linking RVC and non-RVC, and keep the RVC flag. */ |
4116 | elf_elfheader (obfd)->e_flags |= new_flags & EF_RISCV_RVC; | |
4117 | ||
96462b01 S |
4118 | /* Allow linking TSO and non-TSO, and keep the TSO flag. */ |
4119 | elf_elfheader (obfd)->e_flags |= new_flags & EF_RISCV_TSO; | |
4120 | ||
0a1b45a2 | 4121 | return true; |
e23eba97 | 4122 | |
dc1e8a47 | 4123 | fail: |
e23eba97 | 4124 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 4125 | return false; |
e23eba97 NC |
4126 | } |
4127 | ||
9d06997a PD |
4128 | /* A second format for recording PC-relative hi relocations. This stores the |
4129 | information required to relax them to GP-relative addresses. */ | |
4130 | ||
4131 | typedef struct riscv_pcgp_hi_reloc riscv_pcgp_hi_reloc; | |
4132 | struct riscv_pcgp_hi_reloc | |
4133 | { | |
4134 | bfd_vma hi_sec_off; | |
4135 | bfd_vma hi_addend; | |
4136 | bfd_vma hi_addr; | |
4137 | unsigned hi_sym; | |
4138 | asection *sym_sec; | |
0a1b45a2 | 4139 | bool undefined_weak; |
9d06997a PD |
4140 | riscv_pcgp_hi_reloc *next; |
4141 | }; | |
4142 | ||
4143 | typedef struct riscv_pcgp_lo_reloc riscv_pcgp_lo_reloc; | |
4144 | struct riscv_pcgp_lo_reloc | |
4145 | { | |
4146 | bfd_vma hi_sec_off; | |
4147 | riscv_pcgp_lo_reloc *next; | |
4148 | }; | |
4149 | ||
4150 | typedef struct | |
4151 | { | |
4152 | riscv_pcgp_hi_reloc *hi; | |
4153 | riscv_pcgp_lo_reloc *lo; | |
4154 | } riscv_pcgp_relocs; | |
4155 | ||
5f9aecea JW |
4156 | /* Initialize the pcgp reloc info in P. */ |
4157 | ||
0a1b45a2 | 4158 | static bool |
9d06997a PD |
4159 | riscv_init_pcgp_relocs (riscv_pcgp_relocs *p) |
4160 | { | |
4161 | p->hi = NULL; | |
4162 | p->lo = NULL; | |
0a1b45a2 | 4163 | return true; |
9d06997a PD |
4164 | } |
4165 | ||
5f9aecea JW |
4166 | /* Free the pcgp reloc info in P. */ |
4167 | ||
9d06997a PD |
4168 | static void |
4169 | riscv_free_pcgp_relocs (riscv_pcgp_relocs *p, | |
4170 | bfd *abfd ATTRIBUTE_UNUSED, | |
4171 | asection *sec ATTRIBUTE_UNUSED) | |
4172 | { | |
4173 | riscv_pcgp_hi_reloc *c; | |
4174 | riscv_pcgp_lo_reloc *l; | |
4175 | ||
1942a048 | 4176 | for (c = p->hi; c != NULL; ) |
9d06997a PD |
4177 | { |
4178 | riscv_pcgp_hi_reloc *next = c->next; | |
4179 | free (c); | |
4180 | c = next; | |
4181 | } | |
4182 | ||
1942a048 | 4183 | for (l = p->lo; l != NULL; ) |
9d06997a PD |
4184 | { |
4185 | riscv_pcgp_lo_reloc *next = l->next; | |
4186 | free (l); | |
4187 | l = next; | |
4188 | } | |
4189 | } | |
4190 | ||
5f9aecea JW |
4191 | /* Record pcgp hi part reloc info in P, using HI_SEC_OFF as the lookup index. |
4192 | The HI_ADDEND, HI_ADDR, HI_SYM, and SYM_SEC args contain info required to | |
4193 | relax the corresponding lo part reloc. */ | |
4194 | ||
0a1b45a2 | 4195 | static bool |
9d06997a PD |
4196 | riscv_record_pcgp_hi_reloc (riscv_pcgp_relocs *p, bfd_vma hi_sec_off, |
4197 | bfd_vma hi_addend, bfd_vma hi_addr, | |
9d1da81b | 4198 | unsigned hi_sym, asection *sym_sec, |
0a1b45a2 | 4199 | bool undefined_weak) |
9d06997a | 4200 | { |
1942a048 | 4201 | riscv_pcgp_hi_reloc *new = bfd_malloc (sizeof (*new)); |
9d06997a | 4202 | if (!new) |
0a1b45a2 | 4203 | return false; |
9d06997a PD |
4204 | new->hi_sec_off = hi_sec_off; |
4205 | new->hi_addend = hi_addend; | |
4206 | new->hi_addr = hi_addr; | |
4207 | new->hi_sym = hi_sym; | |
4208 | new->sym_sec = sym_sec; | |
9d1da81b | 4209 | new->undefined_weak = undefined_weak; |
9d06997a PD |
4210 | new->next = p->hi; |
4211 | p->hi = new; | |
0a1b45a2 | 4212 | return true; |
9d06997a PD |
4213 | } |
4214 | ||
5f9aecea JW |
4215 | /* Look up hi part pcgp reloc info in P, using HI_SEC_OFF as the lookup index. |
4216 | This is used by a lo part reloc to find the corresponding hi part reloc. */ | |
4217 | ||
9d06997a | 4218 | static riscv_pcgp_hi_reloc * |
1942a048 | 4219 | riscv_find_pcgp_hi_reloc (riscv_pcgp_relocs *p, bfd_vma hi_sec_off) |
9d06997a PD |
4220 | { |
4221 | riscv_pcgp_hi_reloc *c; | |
4222 | ||
4223 | for (c = p->hi; c != NULL; c = c->next) | |
4224 | if (c->hi_sec_off == hi_sec_off) | |
4225 | return c; | |
4226 | return NULL; | |
4227 | } | |
4228 | ||
5f9aecea JW |
4229 | /* Record pcgp lo part reloc info in P, using HI_SEC_OFF as the lookup info. |
4230 | This is used to record relocs that can't be relaxed. */ | |
9d06997a | 4231 | |
0a1b45a2 | 4232 | static bool |
9d06997a PD |
4233 | riscv_record_pcgp_lo_reloc (riscv_pcgp_relocs *p, bfd_vma hi_sec_off) |
4234 | { | |
1942a048 | 4235 | riscv_pcgp_lo_reloc *new = bfd_malloc (sizeof (*new)); |
9d06997a | 4236 | if (!new) |
0a1b45a2 | 4237 | return false; |
9d06997a PD |
4238 | new->hi_sec_off = hi_sec_off; |
4239 | new->next = p->lo; | |
4240 | p->lo = new; | |
0a1b45a2 | 4241 | return true; |
9d06997a PD |
4242 | } |
4243 | ||
5f9aecea JW |
4244 | /* Look up lo part pcgp reloc info in P, using HI_SEC_OFF as the lookup index. |
4245 | This is used by a hi part reloc to find the corresponding lo part reloc. */ | |
4246 | ||
0a1b45a2 | 4247 | static bool |
9d06997a PD |
4248 | riscv_find_pcgp_lo_reloc (riscv_pcgp_relocs *p, bfd_vma hi_sec_off) |
4249 | { | |
4250 | riscv_pcgp_lo_reloc *c; | |
4251 | ||
4252 | for (c = p->lo; c != NULL; c = c->next) | |
4253 | if (c->hi_sec_off == hi_sec_off) | |
0a1b45a2 AM |
4254 | return true; |
4255 | return false; | |
9d06997a PD |
4256 | } |
4257 | ||
9abcdc10 LR |
4258 | static void |
4259 | riscv_update_pcgp_relocs (riscv_pcgp_relocs *p, asection *deleted_sec, | |
4260 | bfd_vma deleted_addr, size_t deleted_count) | |
4261 | { | |
4262 | /* Bytes have already been deleted and toaddr should match the old section | |
4263 | size for our checks, so adjust it here. */ | |
4264 | bfd_vma toaddr = deleted_sec->size + deleted_count; | |
4265 | riscv_pcgp_lo_reloc *l; | |
4266 | riscv_pcgp_hi_reloc *h; | |
4267 | ||
4268 | /* Update section offsets of corresponding pcrel_hi relocs for the pcrel_lo | |
4269 | entries where they occur after the deleted bytes. */ | |
4270 | for (l = p->lo; l != NULL; l = l->next) | |
4271 | if (l->hi_sec_off > deleted_addr | |
4272 | && l->hi_sec_off < toaddr) | |
4273 | l->hi_sec_off -= deleted_count; | |
4274 | ||
4275 | /* Update both section offsets, and symbol values of pcrel_hi relocs where | |
4276 | these values occur after the deleted bytes. */ | |
4277 | for (h = p->hi; h != NULL; h = h->next) | |
4278 | { | |
4279 | if (h->hi_sec_off > deleted_addr | |
4280 | && h->hi_sec_off < toaddr) | |
4281 | h->hi_sec_off -= deleted_count; | |
4282 | if (h->sym_sec == deleted_sec | |
4283 | && h->hi_addr > deleted_addr | |
4284 | && h->hi_addr < toaddr) | |
4285 | h->hi_addr -= deleted_count; | |
4286 | } | |
4287 | } | |
4288 | ||
43025f01 | 4289 | /* Delete some bytes, adjust relcocations and symbol table from a section. */ |
9abcdc10 LR |
4290 | |
4291 | static bool | |
43025f01 PN |
4292 | _riscv_relax_delete_bytes (bfd *abfd, |
4293 | asection *sec, | |
4294 | bfd_vma addr, | |
4295 | size_t count, | |
4296 | struct bfd_link_info *link_info, | |
4297 | riscv_pcgp_relocs *p, | |
4298 | bfd_vma delete_total, | |
4299 | bfd_vma toaddr) | |
9abcdc10 LR |
4300 | { |
4301 | unsigned int i, symcount; | |
9abcdc10 LR |
4302 | struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (abfd); |
4303 | Elf_Internal_Shdr *symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
4304 | unsigned int sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec); | |
4305 | struct bfd_elf_section_data *data = elf_section_data (sec); | |
4306 | bfd_byte *contents = data->this_hdr.contents; | |
43025f01 | 4307 | size_t bytes_to_move = toaddr - addr - count; |
9abcdc10 LR |
4308 | |
4309 | /* Actually delete the bytes. */ | |
4310 | sec->size -= count; | |
43025f01 PN |
4311 | memmove (contents + addr, contents + addr + count + delete_total, bytes_to_move); |
4312 | ||
4313 | /* Still adjust relocations and symbols in non-linear times. */ | |
4314 | toaddr = sec->size + count; | |
9abcdc10 LR |
4315 | |
4316 | /* Adjust the location of all of the relocs. Note that we need not | |
4317 | adjust the addends, since all PC-relative references must be against | |
4318 | symbols, which we will adjust below. */ | |
4319 | for (i = 0; i < sec->reloc_count; i++) | |
4320 | if (data->relocs[i].r_offset > addr && data->relocs[i].r_offset < toaddr) | |
4321 | data->relocs[i].r_offset -= count; | |
4322 | ||
4323 | /* Adjust the hi_sec_off, and the hi_addr of any entries in the pcgp relocs | |
4324 | table for which these values occur after the deleted bytes. */ | |
4325 | if (p) | |
4326 | riscv_update_pcgp_relocs (p, sec, addr, count); | |
4327 | ||
4328 | /* Adjust the local symbols defined in this section. */ | |
4329 | for (i = 0; i < symtab_hdr->sh_info; i++) | |
4330 | { | |
4331 | Elf_Internal_Sym *sym = (Elf_Internal_Sym *) symtab_hdr->contents + i; | |
4332 | if (sym->st_shndx == sec_shndx) | |
4333 | { | |
4334 | /* If the symbol is in the range of memory we just moved, we | |
4335 | have to adjust its value. */ | |
4336 | if (sym->st_value > addr && sym->st_value <= toaddr) | |
4337 | sym->st_value -= count; | |
4338 | ||
4339 | /* If the symbol *spans* the bytes we just deleted (i.e. its | |
4340 | *end* is in the moved bytes but its *start* isn't), then we | |
4341 | must adjust its size. | |
4342 | ||
4343 | This test needs to use the original value of st_value, otherwise | |
4344 | we might accidentally decrease size when deleting bytes right | |
4345 | before the symbol. But since deleted relocs can't span across | |
4346 | symbols, we can't have both a st_value and a st_size decrease, | |
4347 | so it is simpler to just use an else. */ | |
4348 | else if (sym->st_value <= addr | |
4349 | && sym->st_value + sym->st_size > addr | |
4350 | && sym->st_value + sym->st_size <= toaddr) | |
4351 | sym->st_size -= count; | |
4352 | } | |
4353 | } | |
4354 | ||
4355 | /* Now adjust the global symbols defined in this section. */ | |
4356 | symcount = ((symtab_hdr->sh_size / sizeof (ElfNN_External_Sym)) | |
4357 | - symtab_hdr->sh_info); | |
4358 | ||
4359 | for (i = 0; i < symcount; i++) | |
4360 | { | |
4361 | struct elf_link_hash_entry *sym_hash = sym_hashes[i]; | |
4362 | ||
4363 | /* The '--wrap SYMBOL' option is causing a pain when the object file, | |
4364 | containing the definition of __wrap_SYMBOL, includes a direct | |
4365 | call to SYMBOL as well. Since both __wrap_SYMBOL and SYMBOL reference | |
4366 | the same symbol (which is __wrap_SYMBOL), but still exist as two | |
4367 | different symbols in 'sym_hashes', we don't want to adjust | |
4368 | the global symbol __wrap_SYMBOL twice. | |
4369 | ||
4370 | The same problem occurs with symbols that are versioned_hidden, as | |
4371 | foo becomes an alias for foo@BAR, and hence they need the same | |
4372 | treatment. */ | |
4373 | if (link_info->wrap_hash != NULL | |
4374 | || sym_hash->versioned != unversioned) | |
4375 | { | |
4376 | struct elf_link_hash_entry **cur_sym_hashes; | |
4377 | ||
4378 | /* Loop only over the symbols which have already been checked. */ | |
4379 | for (cur_sym_hashes = sym_hashes; cur_sym_hashes < &sym_hashes[i]; | |
4380 | cur_sym_hashes++) | |
4381 | { | |
4382 | /* If the current symbol is identical to 'sym_hash', that means | |
4383 | the symbol was already adjusted (or at least checked). */ | |
4384 | if (*cur_sym_hashes == sym_hash) | |
4385 | break; | |
4386 | } | |
4387 | /* Don't adjust the symbol again. */ | |
4388 | if (cur_sym_hashes < &sym_hashes[i]) | |
4389 | continue; | |
4390 | } | |
4391 | ||
4392 | if ((sym_hash->root.type == bfd_link_hash_defined | |
4393 | || sym_hash->root.type == bfd_link_hash_defweak) | |
4394 | && sym_hash->root.u.def.section == sec) | |
4395 | { | |
4396 | /* As above, adjust the value if needed. */ | |
4397 | if (sym_hash->root.u.def.value > addr | |
4398 | && sym_hash->root.u.def.value <= toaddr) | |
4399 | sym_hash->root.u.def.value -= count; | |
4400 | ||
4401 | /* As above, adjust the size if needed. */ | |
4402 | else if (sym_hash->root.u.def.value <= addr | |
4403 | && sym_hash->root.u.def.value + sym_hash->size > addr | |
4404 | && sym_hash->root.u.def.value + sym_hash->size <= toaddr) | |
4405 | sym_hash->size -= count; | |
4406 | } | |
4407 | } | |
4408 | ||
4409 | return true; | |
4410 | } | |
4411 | ||
43025f01 PN |
4412 | typedef bool (*relax_delete_t) (bfd *, asection *, |
4413 | bfd_vma, size_t, | |
4414 | struct bfd_link_info *, | |
4415 | riscv_pcgp_relocs *, | |
4416 | Elf_Internal_Rela *); | |
4417 | ||
4418 | static relax_delete_t riscv_relax_delete_bytes; | |
4419 | ||
4420 | /* Do not delete some bytes from a section while relaxing. | |
4421 | Just mark the deleted bytes as R_RISCV_DELETE. */ | |
4422 | ||
4423 | static bool | |
4424 | _riscv_relax_delete_piecewise (bfd *abfd ATTRIBUTE_UNUSED, | |
4425 | asection *sec ATTRIBUTE_UNUSED, | |
4426 | bfd_vma addr, | |
4427 | size_t count, | |
4428 | struct bfd_link_info *link_info ATTRIBUTE_UNUSED, | |
4429 | riscv_pcgp_relocs *p ATTRIBUTE_UNUSED, | |
4430 | Elf_Internal_Rela *rel) | |
4431 | { | |
4432 | if (rel == NULL) | |
4433 | return false; | |
4434 | rel->r_info = ELFNN_R_INFO (0, R_RISCV_DELETE); | |
4435 | rel->r_offset = addr; | |
4436 | rel->r_addend = count; | |
4437 | return true; | |
4438 | } | |
4439 | ||
4440 | /* Delete some bytes from a section while relaxing. */ | |
4441 | ||
4442 | static bool | |
4443 | _riscv_relax_delete_immediate (bfd *abfd, | |
4444 | asection *sec, | |
4445 | bfd_vma addr, | |
4446 | size_t count, | |
4447 | struct bfd_link_info *link_info, | |
4448 | riscv_pcgp_relocs *p, | |
4449 | Elf_Internal_Rela *rel) | |
4450 | { | |
4451 | if (rel != NULL) | |
4452 | rel->r_info = ELFNN_R_INFO (0, R_RISCV_NONE); | |
4453 | return _riscv_relax_delete_bytes (abfd, sec, addr, count, | |
4454 | link_info, p, 0, sec->size); | |
4455 | } | |
4456 | ||
4457 | /* Delete the bytes for R_RISCV_DELETE relocs. */ | |
4458 | ||
4459 | static bool | |
4460 | riscv_relax_resolve_delete_relocs (bfd *abfd, | |
4461 | asection *sec, | |
4462 | struct bfd_link_info *link_info, | |
4463 | Elf_Internal_Rela *relocs) | |
4464 | { | |
4465 | bfd_vma delete_total = 0; | |
4466 | unsigned int i; | |
4467 | ||
4468 | for (i = 0; i < sec->reloc_count; i++) | |
4469 | { | |
4470 | Elf_Internal_Rela *rel = relocs + i; | |
4471 | if (ELFNN_R_TYPE (rel->r_info) != R_RISCV_DELETE) | |
4472 | continue; | |
4473 | ||
4474 | /* Find the next R_RISCV_DELETE reloc if possible. */ | |
4475 | Elf_Internal_Rela *rel_next = NULL; | |
4476 | unsigned int start = rel - relocs; | |
4477 | for (i = start; i < sec->reloc_count; i++) | |
4478 | { | |
4479 | /* Since we only replace existing relocs and don't add new relocs, the | |
4480 | relocs are in sequential order. We can skip the relocs prior to this | |
4481 | one, making this search linear time. */ | |
4482 | rel_next = relocs + i; | |
4483 | if (ELFNN_R_TYPE ((rel_next)->r_info) == R_RISCV_DELETE | |
4484 | && (rel_next)->r_offset > rel->r_offset) | |
f52fb009 NC |
4485 | { |
4486 | BFD_ASSERT (rel_next - rel > 0); | |
4487 | break; | |
4488 | } | |
43025f01 PN |
4489 | else |
4490 | rel_next = NULL; | |
4491 | } | |
4492 | ||
4493 | bfd_vma toaddr = rel_next == NULL ? sec->size : rel_next->r_offset; | |
4494 | if (!_riscv_relax_delete_bytes (abfd, sec, rel->r_offset, rel->r_addend, | |
4495 | link_info, NULL, delete_total, toaddr)) | |
4496 | return false; | |
4497 | ||
4498 | delete_total += rel->r_addend; | |
4499 | rel->r_info = ELFNN_R_INFO (0, R_RISCV_NONE); | |
4500 | ||
4501 | /* Skip ahead to the next delete reloc. */ | |
f52fb009 NC |
4502 | i = rel_next != NULL ? (unsigned int) (rel_next - relocs - 1) |
4503 | : sec->reloc_count; | |
43025f01 PN |
4504 | } |
4505 | ||
4506 | return true; | |
4507 | } | |
4508 | ||
0a1b45a2 AM |
4509 | typedef bool (*relax_func_t) (bfd *, asection *, asection *, |
4510 | struct bfd_link_info *, | |
4511 | Elf_Internal_Rela *, | |
4512 | bfd_vma, bfd_vma, bfd_vma, bool *, | |
4513 | riscv_pcgp_relocs *, | |
4514 | bool undefined_weak); | |
45f76423 | 4515 | |
e23eba97 NC |
4516 | /* Relax AUIPC + JALR into JAL. */ |
4517 | ||
0a1b45a2 | 4518 | static bool |
e23eba97 NC |
4519 | _bfd_riscv_relax_call (bfd *abfd, asection *sec, asection *sym_sec, |
4520 | struct bfd_link_info *link_info, | |
4521 | Elf_Internal_Rela *rel, | |
4522 | bfd_vma symval, | |
45f76423 AW |
4523 | bfd_vma max_alignment, |
4524 | bfd_vma reserve_size ATTRIBUTE_UNUSED, | |
0a1b45a2 | 4525 | bool *again, |
9abcdc10 | 4526 | riscv_pcgp_relocs *pcgp_relocs, |
0a1b45a2 | 4527 | bool undefined_weak ATTRIBUTE_UNUSED) |
e23eba97 NC |
4528 | { |
4529 | bfd_byte *contents = elf_section_data (sec)->this_hdr.contents; | |
1174d920 | 4530 | bfd_vma foff = symval - (sec_addr (sec) + rel->r_offset); |
0a1b45a2 | 4531 | bool near_zero = (symval + RISCV_IMM_REACH / 2) < RISCV_IMM_REACH; |
e23eba97 NC |
4532 | bfd_vma auipc, jalr; |
4533 | int rd, r_type, len = 4, rvc = elf_elfheader (abfd)->e_flags & EF_RISCV_RVC; | |
4534 | ||
4535 | /* If the call crosses section boundaries, an alignment directive could | |
c6261a00 JW |
4536 | cause the PC-relative offset to later increase, so we need to add in the |
4537 | max alignment of any section inclusive from the call to the target. | |
4538 | Otherwise, we only need to use the alignment of the current section. */ | |
5a9f5403 | 4539 | if (VALID_JTYPE_IMM (foff)) |
c6261a00 JW |
4540 | { |
4541 | if (sym_sec->output_section == sec->output_section | |
4542 | && sym_sec->output_section != bfd_abs_section_ptr) | |
4543 | max_alignment = (bfd_vma) 1 << sym_sec->output_section->alignment_power; | |
1174d920 | 4544 | foff += ((bfd_signed_vma) foff < 0 ? -max_alignment : max_alignment); |
c6261a00 | 4545 | } |
e23eba97 NC |
4546 | |
4547 | /* See if this function call can be shortened. */ | |
5a9f5403 | 4548 | if (!VALID_JTYPE_IMM (foff) && !(!bfd_link_pic (link_info) && near_zero)) |
0a1b45a2 | 4549 | return true; |
e23eba97 NC |
4550 | |
4551 | /* Shorten the function call. */ | |
4552 | BFD_ASSERT (rel->r_offset + 8 <= sec->size); | |
4553 | ||
fbc09e7a MC |
4554 | auipc = bfd_getl32 (contents + rel->r_offset); |
4555 | jalr = bfd_getl32 (contents + rel->r_offset + 4); | |
e23eba97 | 4556 | rd = (jalr >> OP_SH_RD) & OP_MASK_RD; |
5a9f5403 | 4557 | rvc = rvc && VALID_CJTYPE_IMM (foff); |
e23eba97 | 4558 | |
ae2b14c7 JW |
4559 | /* C.J exists on RV32 and RV64, but C.JAL is RV32-only. */ |
4560 | rvc = rvc && (rd == 0 || (rd == X_RA && ARCH_SIZE == 32)); | |
4561 | ||
4562 | if (rvc) | |
e23eba97 NC |
4563 | { |
4564 | /* Relax to C.J[AL] rd, addr. */ | |
4565 | r_type = R_RISCV_RVC_JUMP; | |
4566 | auipc = rd == 0 ? MATCH_C_J : MATCH_C_JAL; | |
4567 | len = 2; | |
4568 | } | |
5a9f5403 | 4569 | else if (VALID_JTYPE_IMM (foff)) |
e23eba97 NC |
4570 | { |
4571 | /* Relax to JAL rd, addr. */ | |
4572 | r_type = R_RISCV_JAL; | |
4573 | auipc = MATCH_JAL | (rd << OP_SH_RD); | |
4574 | } | |
dcd709e0 | 4575 | else |
e23eba97 | 4576 | { |
dcd709e0 | 4577 | /* Near zero, relax to JALR rd, x0, addr. */ |
e23eba97 NC |
4578 | r_type = R_RISCV_LO12_I; |
4579 | auipc = MATCH_JALR | (rd << OP_SH_RD); | |
4580 | } | |
4581 | ||
4582 | /* Replace the R_RISCV_CALL reloc. */ | |
4583 | rel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info), r_type); | |
4584 | /* Replace the AUIPC. */ | |
fbc09e7a | 4585 | riscv_put_insn (8 * len, auipc, contents + rel->r_offset); |
e23eba97 | 4586 | |
43025f01 | 4587 | /* Delete unnecessary JALR and reuse the R_RISCV_RELAX reloc. */ |
0a1b45a2 | 4588 | *again = true; |
7f02625e | 4589 | return riscv_relax_delete_bytes (abfd, sec, rel->r_offset + len, 8 - len, |
43025f01 | 4590 | link_info, pcgp_relocs, rel + 1); |
e23eba97 NC |
4591 | } |
4592 | ||
0699f2d7 LX |
4593 | /* Traverse all output sections and return the max alignment. |
4594 | ||
4595 | If gp is zero, then all the output section alignments are | |
4596 | possible candidates; Otherwise, only the output sections | |
4597 | which are in the [gp-2K, gp+2K) range need to be considered. */ | |
e23eba97 | 4598 | |
1d61f794 | 4599 | static bfd_vma |
0699f2d7 | 4600 | _bfd_riscv_get_max_alignment (asection *sec, bfd_vma gp) |
e23eba97 NC |
4601 | { |
4602 | unsigned int max_alignment_power = 0; | |
4603 | asection *o; | |
4604 | ||
4605 | for (o = sec->output_section->owner->sections; o != NULL; o = o->next) | |
4606 | { | |
0699f2d7 LX |
4607 | bool valid = true; |
4608 | if (gp | |
4609 | && !(VALID_ITYPE_IMM (sec_addr (o) - gp) | |
4610 | || VALID_ITYPE_IMM (sec_addr (o) + o->size - gp))) | |
4611 | valid = false; | |
4612 | ||
4613 | if (valid && o->alignment_power > max_alignment_power) | |
e23eba97 NC |
4614 | max_alignment_power = o->alignment_power; |
4615 | } | |
4616 | ||
1d61f794 | 4617 | return (bfd_vma) 1 << max_alignment_power; |
e23eba97 NC |
4618 | } |
4619 | ||
dcd709e0 | 4620 | /* Relax non-PIC global variable references to GP-relative references. */ |
e23eba97 | 4621 | |
0a1b45a2 | 4622 | static bool |
e23eba97 NC |
4623 | _bfd_riscv_relax_lui (bfd *abfd, |
4624 | asection *sec, | |
4625 | asection *sym_sec, | |
4626 | struct bfd_link_info *link_info, | |
4627 | Elf_Internal_Rela *rel, | |
4628 | bfd_vma symval, | |
45f76423 AW |
4629 | bfd_vma max_alignment, |
4630 | bfd_vma reserve_size, | |
0a1b45a2 | 4631 | bool *again, |
9abcdc10 | 4632 | riscv_pcgp_relocs *pcgp_relocs, |
0a1b45a2 | 4633 | bool undefined_weak) |
e23eba97 | 4634 | { |
0699f2d7 | 4635 | struct riscv_elf_link_hash_table *htab = riscv_elf_hash_table (link_info); |
e23eba97 | 4636 | bfd_byte *contents = elf_section_data (sec)->this_hdr.contents; |
03e63766 | 4637 | /* Can relax to x0 even when gp relaxation is disabled. */ |
0699f2d7 LX |
4638 | bfd_vma gp = htab->params->relax_gp |
4639 | ? riscv_global_pointer_value (link_info) | |
4640 | : 0; | |
e23eba97 NC |
4641 | int use_rvc = elf_elfheader (abfd)->e_flags & EF_RISCV_RVC; |
4642 | ||
e23eba97 NC |
4643 | BFD_ASSERT (rel->r_offset + 4 <= sec->size); |
4644 | ||
0699f2d7 | 4645 | if (!undefined_weak && gp) |
d0f744f9 | 4646 | { |
507685a3 JW |
4647 | /* If gp and the symbol are in the same output section, which is not the |
4648 | abs section, then consider only that output section's alignment. */ | |
d0f744f9 | 4649 | struct bfd_link_hash_entry *h = |
0a1b45a2 AM |
4650 | bfd_link_hash_lookup (link_info->hash, RISCV_GP_SYMBOL, false, false, |
4651 | true); | |
507685a3 JW |
4652 | if (h->u.def.section->output_section == sym_sec->output_section |
4653 | && sym_sec->output_section != bfd_abs_section_ptr) | |
d0f744f9 | 4654 | max_alignment = (bfd_vma) 1 << sym_sec->output_section->alignment_power; |
0699f2d7 LX |
4655 | else |
4656 | { | |
4657 | /* Consider output section alignments which are in [gp-2K, gp+2K). */ | |
4658 | max_alignment = htab->max_alignment_for_gp; | |
4659 | if (max_alignment == (bfd_vma) -1) | |
4660 | { | |
4661 | max_alignment = _bfd_riscv_get_max_alignment (sec, gp); | |
4662 | htab->max_alignment_for_gp = max_alignment; | |
4663 | } | |
4664 | } | |
d0f744f9 AW |
4665 | } |
4666 | ||
e23eba97 | 4667 | /* Is the reference in range of x0 or gp? |
0699f2d7 LX |
4668 | Valid gp range conservatively because of alignment issue. |
4669 | ||
4670 | Should we also consider the alignment issue for x0 base? */ | |
9d1da81b | 4671 | if (undefined_weak |
0699f2d7 LX |
4672 | || VALID_ITYPE_IMM (symval) |
4673 | || (symval >= gp | |
4674 | && VALID_ITYPE_IMM (symval - gp + max_alignment + reserve_size)) | |
4675 | || (symval < gp | |
4676 | && VALID_ITYPE_IMM (symval - gp - max_alignment - reserve_size))) | |
e23eba97 NC |
4677 | { |
4678 | unsigned sym = ELFNN_R_SYM (rel->r_info); | |
4679 | switch (ELFNN_R_TYPE (rel->r_info)) | |
4680 | { | |
4681 | case R_RISCV_LO12_I: | |
a48ddc3b | 4682 | rel->r_info = ELFNN_R_INFO (sym, R_RISCV_GPREL_I); |
0a1b45a2 | 4683 | return true; |
e23eba97 NC |
4684 | |
4685 | case R_RISCV_LO12_S: | |
a48ddc3b | 4686 | rel->r_info = ELFNN_R_INFO (sym, R_RISCV_GPREL_S); |
0a1b45a2 | 4687 | return true; |
e23eba97 NC |
4688 | |
4689 | case R_RISCV_HI20: | |
43025f01 | 4690 | /* Delete unnecessary LUI and reuse the reloc. */ |
0a1b45a2 | 4691 | *again = true; |
7f02625e | 4692 | return riscv_relax_delete_bytes (abfd, sec, rel->r_offset, 4, |
43025f01 | 4693 | link_info, pcgp_relocs, rel); |
e23eba97 NC |
4694 | |
4695 | default: | |
4696 | abort (); | |
4697 | } | |
4698 | } | |
4699 | ||
4700 | /* Can we relax LUI to C.LUI? Alignment might move the section forward; | |
0f52d45a JW |
4701 | account for this assuming page alignment at worst. In the presence of |
4702 | RELRO segment the linker aligns it by one page size, therefore sections | |
4703 | after the segment can be moved more than one page. */ | |
4704 | ||
e23eba97 NC |
4705 | if (use_rvc |
4706 | && ELFNN_R_TYPE (rel->r_info) == R_RISCV_HI20 | |
5a9f5403 NC |
4707 | && VALID_CITYPE_LUI_IMM (RISCV_CONST_HIGH_PART (symval)) |
4708 | && VALID_CITYPE_LUI_IMM (RISCV_CONST_HIGH_PART (symval) | |
0f52d45a JW |
4709 | + (link_info->relro ? 2 * ELF_MAXPAGESIZE |
4710 | : ELF_MAXPAGESIZE))) | |
e23eba97 | 4711 | { |
3342be5d | 4712 | /* Replace LUI with C.LUI if legal (i.e., rd != x0 and rd != x2/sp). */ |
fbc09e7a | 4713 | bfd_vma lui = bfd_getl32 (contents + rel->r_offset); |
3342be5d AW |
4714 | unsigned rd = ((unsigned)lui >> OP_SH_RD) & OP_MASK_RD; |
4715 | if (rd == 0 || rd == X_SP) | |
0a1b45a2 | 4716 | return true; |
e23eba97 NC |
4717 | |
4718 | lui = (lui & (OP_MASK_RD << OP_SH_RD)) | MATCH_C_LUI; | |
fbc09e7a | 4719 | bfd_putl32 (lui, contents + rel->r_offset); |
e23eba97 NC |
4720 | |
4721 | /* Replace the R_RISCV_HI20 reloc. */ | |
4722 | rel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info), R_RISCV_RVC_LUI); | |
4723 | ||
43025f01 | 4724 | /* Delete extra bytes and reuse the R_RISCV_RELAX reloc. */ |
0a1b45a2 | 4725 | *again = true; |
7f02625e | 4726 | return riscv_relax_delete_bytes (abfd, sec, rel->r_offset + 2, 2, |
43025f01 | 4727 | link_info, pcgp_relocs, rel + 1); |
e23eba97 NC |
4728 | } |
4729 | ||
0a1b45a2 | 4730 | return true; |
e23eba97 NC |
4731 | } |
4732 | ||
dcd709e0 | 4733 | /* Relax non-PIC TLS references to TP-relative references. */ |
e23eba97 | 4734 | |
0a1b45a2 | 4735 | static bool |
e23eba97 NC |
4736 | _bfd_riscv_relax_tls_le (bfd *abfd, |
4737 | asection *sec, | |
4738 | asection *sym_sec ATTRIBUTE_UNUSED, | |
4739 | struct bfd_link_info *link_info, | |
4740 | Elf_Internal_Rela *rel, | |
4741 | bfd_vma symval, | |
45f76423 AW |
4742 | bfd_vma max_alignment ATTRIBUTE_UNUSED, |
4743 | bfd_vma reserve_size ATTRIBUTE_UNUSED, | |
0a1b45a2 | 4744 | bool *again, |
9abcdc10 | 4745 | riscv_pcgp_relocs *pcgp_relocs, |
0a1b45a2 | 4746 | bool undefined_weak ATTRIBUTE_UNUSED) |
e23eba97 NC |
4747 | { |
4748 | /* See if this symbol is in range of tp. */ | |
4749 | if (RISCV_CONST_HIGH_PART (tpoff (link_info, symval)) != 0) | |
0a1b45a2 | 4750 | return true; |
e23eba97 | 4751 | |
e23eba97 | 4752 | BFD_ASSERT (rel->r_offset + 4 <= sec->size); |
45f76423 AW |
4753 | switch (ELFNN_R_TYPE (rel->r_info)) |
4754 | { | |
4755 | case R_RISCV_TPREL_LO12_I: | |
4756 | rel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info), R_RISCV_TPREL_I); | |
0a1b45a2 | 4757 | return true; |
e23eba97 | 4758 | |
45f76423 AW |
4759 | case R_RISCV_TPREL_LO12_S: |
4760 | rel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info), R_RISCV_TPREL_S); | |
0a1b45a2 | 4761 | return true; |
45f76423 AW |
4762 | |
4763 | case R_RISCV_TPREL_HI20: | |
4764 | case R_RISCV_TPREL_ADD: | |
43025f01 | 4765 | /* Delete unnecessary instruction and reuse the reloc. */ |
0a1b45a2 | 4766 | *again = true; |
9abcdc10 | 4767 | return riscv_relax_delete_bytes (abfd, sec, rel->r_offset, 4, link_info, |
43025f01 | 4768 | pcgp_relocs, rel); |
45f76423 AW |
4769 | |
4770 | default: | |
4771 | abort (); | |
4772 | } | |
e23eba97 NC |
4773 | } |
4774 | ||
ebdcad3f NC |
4775 | /* Implement R_RISCV_ALIGN by deleting excess alignment NOPs. |
4776 | Once we've handled an R_RISCV_ALIGN, we can't relax anything else. */ | |
e23eba97 | 4777 | |
0a1b45a2 | 4778 | static bool |
e23eba97 | 4779 | _bfd_riscv_relax_align (bfd *abfd, asection *sec, |
9eb7b0ac | 4780 | asection *sym_sec, |
7f02625e | 4781 | struct bfd_link_info *link_info, |
e23eba97 NC |
4782 | Elf_Internal_Rela *rel, |
4783 | bfd_vma symval, | |
45f76423 AW |
4784 | bfd_vma max_alignment ATTRIBUTE_UNUSED, |
4785 | bfd_vma reserve_size ATTRIBUTE_UNUSED, | |
0a1b45a2 | 4786 | bool *again ATTRIBUTE_UNUSED, |
9abcdc10 | 4787 | riscv_pcgp_relocs *pcgp_relocs ATTRIBUTE_UNUSED, |
0a1b45a2 | 4788 | bool undefined_weak ATTRIBUTE_UNUSED) |
e23eba97 NC |
4789 | { |
4790 | bfd_byte *contents = elf_section_data (sec)->this_hdr.contents; | |
4791 | bfd_vma alignment = 1, pos; | |
4792 | while (alignment <= rel->r_addend) | |
4793 | alignment *= 2; | |
4794 | ||
4795 | symval -= rel->r_addend; | |
4796 | bfd_vma aligned_addr = ((symval - 1) & ~(alignment - 1)) + alignment; | |
4797 | bfd_vma nop_bytes = aligned_addr - symval; | |
4798 | ||
9abcdc10 LR |
4799 | /* Once we've handled an R_RISCV_ALIGN, we can't relax anything else. */ |
4800 | sec->sec_flg0 = true; | |
4801 | ||
e23eba97 NC |
4802 | /* Make sure there are enough NOPs to actually achieve the alignment. */ |
4803 | if (rel->r_addend < nop_bytes) | |
9eb7b0ac | 4804 | { |
f2b740ac AM |
4805 | _bfd_error_handler |
4806 | (_("%pB(%pA+%#" PRIx64 "): %" PRId64 " bytes required for alignment " | |
4807 | "to %" PRId64 "-byte boundary, but only %" PRId64 " present"), | |
4808 | abfd, sym_sec, (uint64_t) rel->r_offset, | |
4809 | (int64_t) nop_bytes, (int64_t) alignment, (int64_t) rel->r_addend); | |
9eb7b0ac | 4810 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 4811 | return false; |
9eb7b0ac | 4812 | } |
e23eba97 NC |
4813 | |
4814 | /* Delete the reloc. */ | |
4815 | rel->r_info = ELFNN_R_INFO (0, R_RISCV_NONE); | |
4816 | ||
4817 | /* If the number of NOPs is already correct, there's nothing to do. */ | |
4818 | if (nop_bytes == rel->r_addend) | |
0a1b45a2 | 4819 | return true; |
e23eba97 NC |
4820 | |
4821 | /* Write as many RISC-V NOPs as we need. */ | |
4822 | for (pos = 0; pos < (nop_bytes & -4); pos += 4) | |
fbc09e7a | 4823 | bfd_putl32 (RISCV_NOP, contents + rel->r_offset + pos); |
e23eba97 NC |
4824 | |
4825 | /* Write a final RVC NOP if need be. */ | |
4826 | if (nop_bytes % 4 != 0) | |
fbc09e7a | 4827 | bfd_putl16 (RVC_NOP, contents + rel->r_offset + pos); |
e23eba97 | 4828 | |
43025f01 | 4829 | /* Delete excess bytes. */ |
e23eba97 | 4830 | return riscv_relax_delete_bytes (abfd, sec, rel->r_offset + nop_bytes, |
9abcdc10 | 4831 | rel->r_addend - nop_bytes, link_info, |
43025f01 | 4832 | NULL, NULL); |
e23eba97 NC |
4833 | } |
4834 | ||
ff6f4d9b PD |
4835 | /* Relax PC-relative references to GP-relative references. */ |
4836 | ||
0a1b45a2 | 4837 | static bool |
1942a048 NC |
4838 | _bfd_riscv_relax_pc (bfd *abfd ATTRIBUTE_UNUSED, |
4839 | asection *sec, | |
4840 | asection *sym_sec, | |
4841 | struct bfd_link_info *link_info, | |
4842 | Elf_Internal_Rela *rel, | |
4843 | bfd_vma symval, | |
4844 | bfd_vma max_alignment, | |
4845 | bfd_vma reserve_size, | |
845652b7 | 4846 | bool *again, |
1942a048 | 4847 | riscv_pcgp_relocs *pcgp_relocs, |
0a1b45a2 | 4848 | bool undefined_weak) |
9d06997a | 4849 | { |
0699f2d7 | 4850 | struct riscv_elf_link_hash_table *htab = riscv_elf_hash_table (link_info); |
03e63766 NC |
4851 | /* Can relax to x0 even when gp relaxation is disabled. */ |
4852 | bfd_vma gp = htab->params->relax_gp | |
4853 | ? riscv_global_pointer_value (link_info) | |
4854 | : 0; | |
9d06997a PD |
4855 | |
4856 | BFD_ASSERT (rel->r_offset + 4 <= sec->size); | |
4857 | ||
4858 | /* Chain the _LO relocs to their cooresponding _HI reloc to compute the | |
dcd709e0 | 4859 | actual target address. */ |
e65b1a78 MR |
4860 | riscv_pcgp_hi_reloc hi_reloc; |
4861 | memset (&hi_reloc, 0, sizeof (hi_reloc)); | |
9d06997a PD |
4862 | switch (ELFNN_R_TYPE (rel->r_info)) |
4863 | { | |
4864 | case R_RISCV_PCREL_LO12_I: | |
4865 | case R_RISCV_PCREL_LO12_S: | |
4866 | { | |
a05f27b6 JW |
4867 | /* If the %lo has an addend, it isn't for the label pointing at the |
4868 | hi part instruction, but rather for the symbol pointed at by the | |
4869 | hi part instruction. So we must subtract it here for the lookup. | |
4870 | It is still used below in the final symbol address. */ | |
4871 | bfd_vma hi_sec_off = symval - sec_addr (sym_sec) - rel->r_addend; | |
9d06997a | 4872 | riscv_pcgp_hi_reloc *hi = riscv_find_pcgp_hi_reloc (pcgp_relocs, |
a05f27b6 | 4873 | hi_sec_off); |
9d06997a PD |
4874 | if (hi == NULL) |
4875 | { | |
a05f27b6 | 4876 | riscv_record_pcgp_lo_reloc (pcgp_relocs, hi_sec_off); |
0a1b45a2 | 4877 | return true; |
9d06997a PD |
4878 | } |
4879 | ||
4880 | hi_reloc = *hi; | |
4881 | symval = hi_reloc.hi_addr; | |
4882 | sym_sec = hi_reloc.sym_sec; | |
9d1da81b JW |
4883 | |
4884 | /* We can not know whether the undefined weak symbol is referenced | |
4885 | according to the information of R_RISCV_PCREL_LO12_I/S. Therefore, | |
4886 | we have to record the 'undefined_weak' flag when handling the | |
4887 | corresponding R_RISCV_HI20 reloc in riscv_record_pcgp_hi_reloc. */ | |
4888 | undefined_weak = hi_reloc.undefined_weak; | |
9d06997a PD |
4889 | } |
4890 | break; | |
4891 | ||
4892 | case R_RISCV_PCREL_HI20: | |
4893 | /* Mergeable symbols and code might later move out of range. */ | |
9d1da81b JW |
4894 | if (! undefined_weak |
4895 | && sym_sec->flags & (SEC_MERGE | SEC_CODE)) | |
0a1b45a2 | 4896 | return true; |
9d06997a PD |
4897 | |
4898 | /* If the cooresponding lo relocation has already been seen then it's not | |
dcd709e0 | 4899 | safe to relax this relocation. */ |
9d06997a | 4900 | if (riscv_find_pcgp_lo_reloc (pcgp_relocs, rel->r_offset)) |
0a1b45a2 | 4901 | return true; |
9d06997a PD |
4902 | |
4903 | break; | |
4904 | ||
4905 | default: | |
4906 | abort (); | |
4907 | } | |
4908 | ||
0699f2d7 | 4909 | if (!undefined_weak && gp) |
9d06997a | 4910 | { |
507685a3 JW |
4911 | /* If gp and the symbol are in the same output section, which is not the |
4912 | abs section, then consider only that output section's alignment. */ | |
9d06997a | 4913 | struct bfd_link_hash_entry *h = |
0a1b45a2 AM |
4914 | bfd_link_hash_lookup (link_info->hash, RISCV_GP_SYMBOL, false, false, |
4915 | true); | |
507685a3 JW |
4916 | if (h->u.def.section->output_section == sym_sec->output_section |
4917 | && sym_sec->output_section != bfd_abs_section_ptr) | |
9d06997a | 4918 | max_alignment = (bfd_vma) 1 << sym_sec->output_section->alignment_power; |
0699f2d7 LX |
4919 | else |
4920 | { | |
4921 | /* Consider output section alignments which are in [gp-2K, gp+2K). */ | |
4922 | max_alignment = htab->max_alignment_for_gp; | |
4923 | if (max_alignment == (bfd_vma) -1) | |
4924 | { | |
4925 | max_alignment = _bfd_riscv_get_max_alignment (sec, gp); | |
4926 | htab->max_alignment_for_gp = max_alignment; | |
4927 | } | |
4928 | } | |
9d06997a PD |
4929 | } |
4930 | ||
4931 | /* Is the reference in range of x0 or gp? | |
0699f2d7 LX |
4932 | Valid gp range conservatively because of alignment issue. |
4933 | ||
4934 | Should we also consider the alignment issue for x0 base? */ | |
9d1da81b | 4935 | if (undefined_weak |
0699f2d7 LX |
4936 | || VALID_ITYPE_IMM (symval) |
4937 | || (symval >= gp | |
4938 | && VALID_ITYPE_IMM (symval - gp + max_alignment + reserve_size)) | |
4939 | || (symval < gp | |
4940 | && VALID_ITYPE_IMM (symval - gp - max_alignment - reserve_size))) | |
9d06997a PD |
4941 | { |
4942 | unsigned sym = hi_reloc.hi_sym; | |
4943 | switch (ELFNN_R_TYPE (rel->r_info)) | |
4944 | { | |
4945 | case R_RISCV_PCREL_LO12_I: | |
a48ddc3b NC |
4946 | rel->r_info = ELFNN_R_INFO (sym, R_RISCV_GPREL_I); |
4947 | rel->r_addend += hi_reloc.hi_addend; | |
0a1b45a2 | 4948 | return true; |
9d06997a PD |
4949 | |
4950 | case R_RISCV_PCREL_LO12_S: | |
a48ddc3b NC |
4951 | rel->r_info = ELFNN_R_INFO (sym, R_RISCV_GPREL_S); |
4952 | rel->r_addend += hi_reloc.hi_addend; | |
0a1b45a2 | 4953 | return true; |
9d06997a PD |
4954 | |
4955 | case R_RISCV_PCREL_HI20: | |
07d6d2b8 | 4956 | riscv_record_pcgp_hi_reloc (pcgp_relocs, |
9d06997a PD |
4957 | rel->r_offset, |
4958 | rel->r_addend, | |
4959 | symval, | |
4960 | ELFNN_R_SYM(rel->r_info), | |
9d1da81b JW |
4961 | sym_sec, |
4962 | undefined_weak); | |
43025f01 | 4963 | /* Delete unnecessary AUIPC and reuse the reloc. */ |
845652b7 | 4964 | *again = true; |
43025f01 PN |
4965 | riscv_relax_delete_bytes (abfd, sec, rel->r_offset, 4, link_info, |
4966 | pcgp_relocs, rel); | |
0a1b45a2 | 4967 | return true; |
9d06997a PD |
4968 | |
4969 | default: | |
4970 | abort (); | |
4971 | } | |
4972 | } | |
4973 | ||
0a1b45a2 | 4974 | return true; |
9d06997a PD |
4975 | } |
4976 | ||
ef9d2565 NC |
4977 | /* Called by after_allocation to set the information of data segment |
4978 | before relaxing. */ | |
4979 | ||
4980 | void | |
4981 | bfd_elfNN_riscv_set_data_segment_info (struct bfd_link_info *info, | |
4982 | int *data_segment_phase) | |
4983 | { | |
4984 | struct riscv_elf_link_hash_table *htab = riscv_elf_hash_table (info); | |
4985 | htab->data_segment_phase = data_segment_phase; | |
4986 | } | |
4987 | ||
dcd709e0 NC |
4988 | /* Relax a section. |
4989 | ||
779b2502 TO |
4990 | Pass 0: Shortens code sequences for LUI/CALL/TPREL/PCREL relocs and |
4991 | deletes the obsolete bytes. | |
4992 | Pass 1: Which cannot be disabled, handles code alignment directives. */ | |
e23eba97 | 4993 | |
0a1b45a2 | 4994 | static bool |
e23eba97 NC |
4995 | _bfd_riscv_relax_section (bfd *abfd, asection *sec, |
4996 | struct bfd_link_info *info, | |
0a1b45a2 | 4997 | bool *again) |
e23eba97 NC |
4998 | { |
4999 | Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (abfd); | |
5000 | struct riscv_elf_link_hash_table *htab = riscv_elf_hash_table (info); | |
5001 | struct bfd_elf_section_data *data = elf_section_data (sec); | |
5002 | Elf_Internal_Rela *relocs; | |
0a1b45a2 | 5003 | bool ret = false; |
e23eba97 | 5004 | unsigned int i; |
45f76423 | 5005 | bfd_vma max_alignment, reserve_size = 0; |
9d06997a | 5006 | riscv_pcgp_relocs pcgp_relocs; |
0699f2d7 | 5007 | static asection *first_section = NULL; |
e23eba97 | 5008 | |
0a1b45a2 | 5009 | *again = false; |
e23eba97 NC |
5010 | |
5011 | if (bfd_link_relocatable (info) | |
9abcdc10 | 5012 | || sec->sec_flg0 |
e23eba97 | 5013 | || sec->reloc_count == 0 |
3a574cce AM |
5014 | || (sec->flags & SEC_RELOC) == 0 |
5015 | || (sec->flags & SEC_HAS_CONTENTS) == 0 | |
e23eba97 | 5016 | || (info->disable_target_specific_optimizations |
9abcdc10 | 5017 | && info->relax_pass == 0) |
ef9d2565 NC |
5018 | /* The exp_seg_relro_adjust is enum phase_enum (0x4), |
5019 | and defined in ld/ldexp.h. */ | |
5020 | || *(htab->data_segment_phase) == 4) | |
0a1b45a2 | 5021 | return true; |
e23eba97 | 5022 | |
0699f2d7 LX |
5023 | /* Record the first relax section, so that we can reset the |
5024 | max_alignment_for_gp for the repeated relax passes. */ | |
5025 | if (first_section == NULL) | |
5026 | first_section = sec; | |
5027 | else if (first_section == sec) | |
5028 | htab->max_alignment_for_gp = -1; | |
5029 | ||
9d06997a PD |
5030 | riscv_init_pcgp_relocs (&pcgp_relocs); |
5031 | ||
e23eba97 NC |
5032 | /* Read this BFD's relocs if we haven't done so already. */ |
5033 | if (data->relocs) | |
5034 | relocs = data->relocs; | |
5035 | else if (!(relocs = _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, | |
5036 | info->keep_memory))) | |
5037 | goto fail; | |
5038 | ||
0699f2d7 LX |
5039 | /* Estimate the maximum alignment for all output sections once time |
5040 | should be enough. */ | |
5041 | max_alignment = htab->max_alignment; | |
5042 | if (max_alignment == (bfd_vma) -1) | |
fc3c5343 | 5043 | { |
0699f2d7 LX |
5044 | max_alignment = _bfd_riscv_get_max_alignment (sec, 0/* gp */); |
5045 | htab->max_alignment = max_alignment; | |
fc3c5343 | 5046 | } |
e23eba97 NC |
5047 | |
5048 | /* Examine and consider relaxing each reloc. */ | |
5049 | for (i = 0; i < sec->reloc_count; i++) | |
5050 | { | |
5051 | asection *sym_sec; | |
5052 | Elf_Internal_Rela *rel = relocs + i; | |
45f76423 | 5053 | relax_func_t relax_func; |
e23eba97 NC |
5054 | int type = ELFNN_R_TYPE (rel->r_info); |
5055 | bfd_vma symval; | |
04b865dc | 5056 | char symtype; |
0a1b45a2 | 5057 | bool undefined_weak = false; |
e23eba97 | 5058 | |
ff6f4d9b | 5059 | relax_func = NULL; |
43025f01 | 5060 | riscv_relax_delete_bytes = NULL; |
e23eba97 NC |
5061 | if (info->relax_pass == 0) |
5062 | { | |
abd20cb6 NC |
5063 | if (type == R_RISCV_CALL |
5064 | || type == R_RISCV_CALL_PLT) | |
e23eba97 NC |
5065 | relax_func = _bfd_riscv_relax_call; |
5066 | else if (type == R_RISCV_HI20 | |
5067 | || type == R_RISCV_LO12_I | |
5068 | || type == R_RISCV_LO12_S) | |
5069 | relax_func = _bfd_riscv_relax_lui; | |
45f76423 AW |
5070 | else if (type == R_RISCV_TPREL_HI20 |
5071 | || type == R_RISCV_TPREL_ADD | |
5072 | || type == R_RISCV_TPREL_LO12_I | |
5073 | || type == R_RISCV_TPREL_LO12_S) | |
e23eba97 | 5074 | relax_func = _bfd_riscv_relax_tls_le; |
03e63766 | 5075 | else if (!bfd_link_pic (info) |
9abcdc10 LR |
5076 | && (type == R_RISCV_PCREL_HI20 |
5077 | || type == R_RISCV_PCREL_LO12_I | |
5078 | || type == R_RISCV_PCREL_LO12_S)) | |
5079 | relax_func = _bfd_riscv_relax_pc; | |
45f76423 AW |
5080 | else |
5081 | continue; | |
43025f01 | 5082 | riscv_relax_delete_bytes = _riscv_relax_delete_piecewise; |
45f76423 AW |
5083 | |
5084 | /* Only relax this reloc if it is paired with R_RISCV_RELAX. */ | |
5085 | if (i == sec->reloc_count - 1 | |
5086 | || ELFNN_R_TYPE ((rel + 1)->r_info) != R_RISCV_RELAX | |
5087 | || rel->r_offset != (rel + 1)->r_offset) | |
5088 | continue; | |
5089 | ||
5090 | /* Skip over the R_RISCV_RELAX. */ | |
5091 | i++; | |
e23eba97 | 5092 | } |
43025f01 PN |
5093 | else if (info->relax_pass == 1 && type == R_RISCV_ALIGN) |
5094 | { | |
5095 | relax_func = _bfd_riscv_relax_align; | |
5096 | riscv_relax_delete_bytes = _riscv_relax_delete_immediate; | |
5097 | } | |
9abcdc10 LR |
5098 | else |
5099 | continue; | |
e23eba97 NC |
5100 | |
5101 | data->relocs = relocs; | |
5102 | ||
5103 | /* Read this BFD's contents if we haven't done so already. */ | |
5104 | if (!data->this_hdr.contents | |
5105 | && !bfd_malloc_and_get_section (abfd, sec, &data->this_hdr.contents)) | |
5106 | goto fail; | |
5107 | ||
5108 | /* Read this BFD's symbols if we haven't done so already. */ | |
5109 | if (symtab_hdr->sh_info != 0 | |
5110 | && !symtab_hdr->contents | |
5111 | && !(symtab_hdr->contents = | |
5112 | (unsigned char *) bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
5113 | symtab_hdr->sh_info, | |
5114 | 0, NULL, NULL, NULL))) | |
5115 | goto fail; | |
5116 | ||
5117 | /* Get the value of the symbol referred to by the reloc. */ | |
5118 | if (ELFNN_R_SYM (rel->r_info) < symtab_hdr->sh_info) | |
5119 | { | |
5120 | /* A local symbol. */ | |
5121 | Elf_Internal_Sym *isym = ((Elf_Internal_Sym *) symtab_hdr->contents | |
5122 | + ELFNN_R_SYM (rel->r_info)); | |
45f76423 AW |
5123 | reserve_size = (isym->st_size - rel->r_addend) > isym->st_size |
5124 | ? 0 : isym->st_size - rel->r_addend; | |
e23eba97 | 5125 | |
02dd9d25 NC |
5126 | /* Relocate against local STT_GNU_IFUNC symbol. we have created |
5127 | a fake global symbol entry for this, so deal with the local ifunc | |
5128 | as a global. */ | |
5129 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) | |
5130 | continue; | |
5131 | ||
e23eba97 | 5132 | if (isym->st_shndx == SHN_UNDEF) |
04b865dc | 5133 | sym_sec = sec, symval = rel->r_offset; |
e23eba97 NC |
5134 | else |
5135 | { | |
5136 | BFD_ASSERT (isym->st_shndx < elf_numsections (abfd)); | |
5137 | sym_sec = elf_elfsections (abfd)[isym->st_shndx]->bfd_section; | |
09ca4b9d JW |
5138 | #if 0 |
5139 | /* The purpose of this code is unknown. It breaks linker scripts | |
5140 | for embedded development that place sections at address zero. | |
5141 | This code is believed to be unnecessary. Disabling it but not | |
5142 | yet removing it, in case something breaks. */ | |
e23eba97 NC |
5143 | if (sec_addr (sym_sec) == 0) |
5144 | continue; | |
09ca4b9d | 5145 | #endif |
04b865dc | 5146 | symval = isym->st_value; |
e23eba97 | 5147 | } |
04b865dc | 5148 | symtype = ELF_ST_TYPE (isym->st_info); |
e23eba97 NC |
5149 | } |
5150 | else | |
5151 | { | |
5152 | unsigned long indx; | |
5153 | struct elf_link_hash_entry *h; | |
5154 | ||
5155 | indx = ELFNN_R_SYM (rel->r_info) - symtab_hdr->sh_info; | |
5156 | h = elf_sym_hashes (abfd)[indx]; | |
5157 | ||
5158 | while (h->root.type == bfd_link_hash_indirect | |
5159 | || h->root.type == bfd_link_hash_warning) | |
5160 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
5161 | ||
02dd9d25 NC |
5162 | /* Disable the relaxation for ifunc. */ |
5163 | if (h != NULL && h->type == STT_GNU_IFUNC) | |
5164 | continue; | |
5165 | ||
d08515a6 NC |
5166 | /* Maybe we should check UNDEFWEAK_NO_DYNAMIC_RELOC here? But that |
5167 | will break the undefweak relaxation testcases, so just make sure | |
5168 | we won't do relaxations for linker_def symbols in short-term. */ | |
9d1da81b | 5169 | if (h->root.type == bfd_link_hash_undefweak |
d08515a6 NC |
5170 | /* The linker_def symbol like __ehdr_start that may be undefweak |
5171 | for now, but will be guaranteed to be defined later. */ | |
5172 | && !h->root.linker_def | |
9d1da81b JW |
5173 | && (relax_func == _bfd_riscv_relax_lui |
5174 | || relax_func == _bfd_riscv_relax_pc)) | |
5175 | { | |
5176 | /* For the lui and auipc relaxations, since the symbol | |
5177 | value of an undefined weak symbol is always be zero, | |
5178 | we can optimize the patterns into a single LI/MV/ADDI | |
5179 | instruction. | |
5180 | ||
5181 | Note that, creating shared libraries and pie output may | |
5182 | break the rule above. Fortunately, since we do not relax | |
5183 | pc relocs when creating shared libraries and pie output, | |
5184 | and the absolute address access for R_RISCV_HI20 isn't | |
5185 | allowed when "-fPIC" is set, the problem of creating shared | |
5186 | libraries can not happen currently. Once we support the | |
5187 | auipc relaxations when creating shared libraries, then we will | |
5188 | need the more rigorous checking for this optimization. */ | |
0a1b45a2 | 5189 | undefined_weak = true; |
9d1da81b JW |
5190 | } |
5191 | ||
85f78364 JW |
5192 | /* This line has to match the check in riscv_elf_relocate_section |
5193 | in the R_RISCV_CALL[_PLT] case. */ | |
5194 | if (bfd_link_pic (info) && h->plt.offset != MINUS_ONE) | |
04b865dc JW |
5195 | { |
5196 | sym_sec = htab->elf.splt; | |
5197 | symval = h->plt.offset; | |
5198 | } | |
9d1da81b JW |
5199 | else if (undefined_weak) |
5200 | { | |
5201 | symval = 0; | |
5202 | sym_sec = bfd_und_section_ptr; | |
5203 | } | |
a2714d6c AM |
5204 | else if ((h->root.type == bfd_link_hash_defined |
5205 | || h->root.type == bfd_link_hash_defweak) | |
5206 | && h->root.u.def.section != NULL | |
5207 | && h->root.u.def.section->output_section != NULL) | |
04b865dc JW |
5208 | { |
5209 | symval = h->root.u.def.value; | |
5210 | sym_sec = h->root.u.def.section; | |
5211 | } | |
a2714d6c AM |
5212 | else |
5213 | continue; | |
e23eba97 | 5214 | |
45f76423 AW |
5215 | if (h->type != STT_FUNC) |
5216 | reserve_size = | |
5217 | (h->size - rel->r_addend) > h->size ? 0 : h->size - rel->r_addend; | |
04b865dc | 5218 | symtype = h->type; |
e23eba97 NC |
5219 | } |
5220 | ||
04b865dc JW |
5221 | if (sym_sec->sec_info_type == SEC_INFO_TYPE_MERGE |
5222 | && (sym_sec->flags & SEC_MERGE)) | |
5223 | { | |
5224 | /* At this stage in linking, no SEC_MERGE symbol has been | |
5225 | adjusted, so all references to such symbols need to be | |
5226 | passed through _bfd_merged_section_offset. (Later, in | |
5227 | relocate_section, all SEC_MERGE symbols *except* for | |
5228 | section symbols have been adjusted.) | |
5229 | ||
5230 | gas may reduce relocations against symbols in SEC_MERGE | |
5231 | sections to a relocation against the section symbol when | |
5232 | the original addend was zero. When the reloc is against | |
5233 | a section symbol we should include the addend in the | |
5234 | offset passed to _bfd_merged_section_offset, since the | |
5235 | location of interest is the original symbol. On the | |
5236 | other hand, an access to "sym+addend" where "sym" is not | |
5237 | a section symbol should not include the addend; Such an | |
5238 | access is presumed to be an offset from "sym"; The | |
5239 | location of interest is just "sym". */ | |
5240 | if (symtype == STT_SECTION) | |
5241 | symval += rel->r_addend; | |
5242 | ||
5243 | symval = _bfd_merged_section_offset (abfd, &sym_sec, | |
5244 | elf_section_data (sym_sec)->sec_info, | |
5245 | symval); | |
5246 | ||
5247 | if (symtype != STT_SECTION) | |
5248 | symval += rel->r_addend; | |
5249 | } | |
5250 | else | |
5251 | symval += rel->r_addend; | |
5252 | ||
5253 | symval += sec_addr (sym_sec); | |
e23eba97 NC |
5254 | |
5255 | if (!relax_func (abfd, sec, sym_sec, info, rel, symval, | |
9d06997a | 5256 | max_alignment, reserve_size, again, |
9d1da81b | 5257 | &pcgp_relocs, undefined_weak)) |
e23eba97 NC |
5258 | goto fail; |
5259 | } | |
5260 | ||
43025f01 PN |
5261 | /* Resolve R_RISCV_DELETE relocations. */ |
5262 | if (!riscv_relax_resolve_delete_relocs (abfd, sec, info, relocs)) | |
5263 | goto fail; | |
5264 | ||
0a1b45a2 | 5265 | ret = true; |
e23eba97 | 5266 | |
dc1e8a47 | 5267 | fail: |
e23eba97 NC |
5268 | if (relocs != data->relocs) |
5269 | free (relocs); | |
1942a048 | 5270 | riscv_free_pcgp_relocs (&pcgp_relocs, abfd, sec); |
e23eba97 NC |
5271 | |
5272 | return ret; | |
5273 | } | |
5274 | ||
5275 | #if ARCH_SIZE == 32 | |
79b8e8ab | 5276 | # define PRSTATUS_SIZE 204 |
e23eba97 NC |
5277 | # define PRSTATUS_OFFSET_PR_CURSIG 12 |
5278 | # define PRSTATUS_OFFSET_PR_PID 24 | |
5279 | # define PRSTATUS_OFFSET_PR_REG 72 | |
5280 | # define ELF_GREGSET_T_SIZE 128 | |
5281 | # define PRPSINFO_SIZE 128 | |
5282 | # define PRPSINFO_OFFSET_PR_PID 16 | |
5283 | # define PRPSINFO_OFFSET_PR_FNAME 32 | |
5284 | # define PRPSINFO_OFFSET_PR_PSARGS 48 | |
0897bb7d AB |
5285 | # define PRPSINFO_PR_FNAME_LENGTH 16 |
5286 | # define PRPSINFO_PR_PSARGS_LENGTH 80 | |
e23eba97 NC |
5287 | #else |
5288 | # define PRSTATUS_SIZE 376 | |
5289 | # define PRSTATUS_OFFSET_PR_CURSIG 12 | |
5290 | # define PRSTATUS_OFFSET_PR_PID 32 | |
5291 | # define PRSTATUS_OFFSET_PR_REG 112 | |
5292 | # define ELF_GREGSET_T_SIZE 256 | |
5293 | # define PRPSINFO_SIZE 136 | |
5294 | # define PRPSINFO_OFFSET_PR_PID 24 | |
5295 | # define PRPSINFO_OFFSET_PR_FNAME 40 | |
5296 | # define PRPSINFO_OFFSET_PR_PSARGS 56 | |
0897bb7d AB |
5297 | # define PRPSINFO_PR_FNAME_LENGTH 16 |
5298 | # define PRPSINFO_PR_PSARGS_LENGTH 80 | |
e23eba97 NC |
5299 | #endif |
5300 | ||
0897bb7d AB |
5301 | /* Write PRSTATUS and PRPSINFO note into core file. This will be called |
5302 | before the generic code in elf.c. By checking the compiler defines we | |
5303 | only perform any action here if the generic code would otherwise not be | |
5304 | able to help us. The intention is that bare metal core dumps (where the | |
5305 | prstatus_t and/or prpsinfo_t might not be available) will use this code, | |
5306 | while non bare metal tools will use the generic elf code. */ | |
5307 | ||
5308 | static char * | |
5309 | riscv_write_core_note (bfd *abfd ATTRIBUTE_UNUSED, | |
5310 | char *buf ATTRIBUTE_UNUSED, | |
5311 | int *bufsiz ATTRIBUTE_UNUSED, | |
5312 | int note_type ATTRIBUTE_UNUSED, ...) | |
5313 | { | |
5314 | switch (note_type) | |
5315 | { | |
5316 | default: | |
5317 | return NULL; | |
5318 | ||
5319 | #if !defined (HAVE_PRPSINFO_T) | |
5320 | case NT_PRPSINFO: | |
5321 | { | |
5322 | char data[PRPSINFO_SIZE] ATTRIBUTE_NONSTRING; | |
5323 | va_list ap; | |
5324 | ||
5325 | va_start (ap, note_type); | |
5326 | memset (data, 0, sizeof (data)); | |
5327 | strncpy (data + PRPSINFO_OFFSET_PR_FNAME, va_arg (ap, const char *), | |
5328 | PRPSINFO_PR_FNAME_LENGTH); | |
5329 | #if GCC_VERSION == 8000 || GCC_VERSION == 8001 | |
5330 | DIAGNOSTIC_PUSH; | |
5331 | /* GCC 8.0 and 8.1 warn about 80 equals destination size with | |
5332 | -Wstringop-truncation: | |
5333 | https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643 | |
5334 | */ | |
5335 | DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION; | |
5336 | #endif | |
5337 | strncpy (data + PRPSINFO_OFFSET_PR_PSARGS, va_arg (ap, const char *), | |
5338 | PRPSINFO_PR_PSARGS_LENGTH); | |
5339 | #if GCC_VERSION == 8000 || GCC_VERSION == 8001 | |
5340 | DIAGNOSTIC_POP; | |
5341 | #endif | |
5342 | va_end (ap); | |
5343 | return elfcore_write_note (abfd, buf, bufsiz, | |
5344 | "CORE", note_type, data, sizeof (data)); | |
5345 | } | |
5346 | #endif /* !HAVE_PRPSINFO_T */ | |
5347 | ||
5348 | #if !defined (HAVE_PRSTATUS_T) | |
5349 | case NT_PRSTATUS: | |
5350 | { | |
5351 | char data[PRSTATUS_SIZE]; | |
5352 | va_list ap; | |
5353 | long pid; | |
5354 | int cursig; | |
5355 | const void *greg; | |
5356 | ||
5357 | va_start (ap, note_type); | |
5358 | memset (data, 0, sizeof(data)); | |
5359 | pid = va_arg (ap, long); | |
5360 | bfd_put_32 (abfd, pid, data + PRSTATUS_OFFSET_PR_PID); | |
5361 | cursig = va_arg (ap, int); | |
5362 | bfd_put_16 (abfd, cursig, data + PRSTATUS_OFFSET_PR_CURSIG); | |
5363 | greg = va_arg (ap, const void *); | |
5364 | memcpy (data + PRSTATUS_OFFSET_PR_REG, greg, | |
5365 | PRSTATUS_SIZE - PRSTATUS_OFFSET_PR_REG - ARCH_SIZE / 8); | |
5366 | va_end (ap); | |
5367 | return elfcore_write_note (abfd, buf, bufsiz, | |
5368 | "CORE", note_type, data, sizeof (data)); | |
5369 | } | |
5370 | #endif /* !HAVE_PRSTATUS_T */ | |
5371 | } | |
5372 | } | |
5373 | ||
e23eba97 NC |
5374 | /* Support for core dump NOTE sections. */ |
5375 | ||
0a1b45a2 | 5376 | static bool |
e23eba97 NC |
5377 | riscv_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
5378 | { | |
5379 | switch (note->descsz) | |
5380 | { | |
5381 | default: | |
0a1b45a2 | 5382 | return false; |
e23eba97 | 5383 | |
dcd709e0 | 5384 | case PRSTATUS_SIZE: /* sizeof(struct elf_prstatus) on Linux/RISC-V. */ |
e23eba97 NC |
5385 | /* pr_cursig */ |
5386 | elf_tdata (abfd)->core->signal | |
5387 | = bfd_get_16 (abfd, note->descdata + PRSTATUS_OFFSET_PR_CURSIG); | |
5388 | ||
5389 | /* pr_pid */ | |
5390 | elf_tdata (abfd)->core->lwpid | |
5391 | = bfd_get_32 (abfd, note->descdata + PRSTATUS_OFFSET_PR_PID); | |
5392 | break; | |
5393 | } | |
5394 | ||
5395 | /* Make a ".reg/999" section. */ | |
5396 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", ELF_GREGSET_T_SIZE, | |
5397 | note->descpos + PRSTATUS_OFFSET_PR_REG); | |
5398 | } | |
5399 | ||
0a1b45a2 | 5400 | static bool |
e23eba97 NC |
5401 | riscv_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
5402 | { | |
5403 | switch (note->descsz) | |
5404 | { | |
5405 | default: | |
0a1b45a2 | 5406 | return false; |
e23eba97 NC |
5407 | |
5408 | case PRPSINFO_SIZE: /* sizeof(struct elf_prpsinfo) on Linux/RISC-V. */ | |
5409 | /* pr_pid */ | |
5410 | elf_tdata (abfd)->core->pid | |
5411 | = bfd_get_32 (abfd, note->descdata + PRPSINFO_OFFSET_PR_PID); | |
5412 | ||
5413 | /* pr_fname */ | |
5414 | elf_tdata (abfd)->core->program = _bfd_elfcore_strndup | |
0897bb7d AB |
5415 | (abfd, note->descdata + PRPSINFO_OFFSET_PR_FNAME, |
5416 | PRPSINFO_PR_FNAME_LENGTH); | |
e23eba97 NC |
5417 | |
5418 | /* pr_psargs */ | |
5419 | elf_tdata (abfd)->core->command = _bfd_elfcore_strndup | |
0897bb7d AB |
5420 | (abfd, note->descdata + PRPSINFO_OFFSET_PR_PSARGS, |
5421 | PRPSINFO_PR_PSARGS_LENGTH); | |
e23eba97 NC |
5422 | break; |
5423 | } | |
5424 | ||
5425 | /* Note that for some reason, a spurious space is tacked | |
5426 | onto the end of the args in some (at least one anyway) | |
5427 | implementations, so strip it off if it exists. */ | |
5428 | ||
5429 | { | |
5430 | char *command = elf_tdata (abfd)->core->command; | |
5431 | int n = strlen (command); | |
5432 | ||
5433 | if (0 < n && command[n - 1] == ' ') | |
5434 | command[n - 1] = '\0'; | |
5435 | } | |
5436 | ||
0a1b45a2 | 5437 | return true; |
e23eba97 NC |
5438 | } |
5439 | ||
640d6bfd | 5440 | /* Set the right mach type. */ |
dcd709e0 | 5441 | |
0a1b45a2 | 5442 | static bool |
640d6bfd KLC |
5443 | riscv_elf_object_p (bfd *abfd) |
5444 | { | |
5445 | /* There are only two mach types in RISCV currently. */ | |
fbc09e7a MC |
5446 | if (strcmp (abfd->xvec->name, "elf32-littleriscv") == 0 |
5447 | || strcmp (abfd->xvec->name, "elf32-bigriscv") == 0) | |
640d6bfd KLC |
5448 | bfd_default_set_arch_mach (abfd, bfd_arch_riscv, bfd_mach_riscv32); |
5449 | else | |
5450 | bfd_default_set_arch_mach (abfd, bfd_arch_riscv, bfd_mach_riscv64); | |
5451 | ||
0a1b45a2 | 5452 | return true; |
640d6bfd KLC |
5453 | } |
5454 | ||
2dc8dd17 JW |
5455 | /* Determine whether an object attribute tag takes an integer, a |
5456 | string or both. */ | |
5457 | ||
5458 | static int | |
5459 | riscv_elf_obj_attrs_arg_type (int tag) | |
5460 | { | |
5461 | return (tag & 1) != 0 ? ATTR_TYPE_FLAG_STR_VAL : ATTR_TYPE_FLAG_INT_VAL; | |
5462 | } | |
e23eba97 | 5463 | |
9b9b1092 NC |
5464 | /* Do not choose mapping symbols as a function name. */ |
5465 | ||
5466 | static bfd_size_type | |
5467 | riscv_maybe_function_sym (const asymbol *sym, | |
5468 | asection *sec, | |
5469 | bfd_vma *code_off) | |
5470 | { | |
5471 | if (sym->flags & BSF_LOCAL | |
907aee5b MW |
5472 | && (riscv_elf_is_mapping_symbols (sym->name) |
5473 | || _bfd_elf_is_local_label_name (sec->owner, sym->name))) | |
9b9b1092 NC |
5474 | return 0; |
5475 | ||
5476 | return _bfd_elf_maybe_function_sym (sym, sec, code_off); | |
5477 | } | |
5478 | ||
5479 | /* Treat the following cases as target special symbols, they are | |
5480 | usually omitted. */ | |
ddfe525f NC |
5481 | |
5482 | static bool | |
5483 | riscv_elf_is_target_special_symbol (bfd *abfd, asymbol *sym) | |
5484 | { | |
9b9b1092 NC |
5485 | /* PR27584, local and empty symbols. Since they are usually |
5486 | generated for pcrel relocations. */ | |
ddfe525f | 5487 | return (!strcmp (sym->name, "") |
9b9b1092 NC |
5488 | || _bfd_elf_is_local_label_name (abfd, sym->name) |
5489 | /* PR27916, mapping symbols. */ | |
5490 | || riscv_elf_is_mapping_symbols (sym->name)); | |
ddfe525f NC |
5491 | } |
5492 | ||
fbc95f1e KC |
5493 | static int |
5494 | riscv_elf_additional_program_headers (bfd *abfd, | |
5495 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
5496 | { | |
fbc95f1e KC |
5497 | int ret = 0; |
5498 | ||
5499 | /* See if we need a PT_RISCV_ATTRIBUTES segment. */ | |
5500 | if (bfd_get_section_by_name (abfd, RISCV_ATTRIBUTES_SECTION_NAME)) | |
5501 | ++ret; | |
5502 | ||
5503 | return ret; | |
5504 | } | |
5505 | ||
5506 | static bool | |
5507 | riscv_elf_modify_segment_map (bfd *abfd, | |
70a59063 | 5508 | struct bfd_link_info *info ATTRIBUTE_UNUSED) |
fbc95f1e KC |
5509 | { |
5510 | asection *s; | |
5511 | struct elf_segment_map *m, **pm; | |
5512 | size_t amt; | |
5513 | ||
5514 | /* If there is a .riscv.attributes section, we need a PT_RISCV_ATTRIBUTES | |
5515 | segment. */ | |
5516 | s = bfd_get_section_by_name (abfd, RISCV_ATTRIBUTES_SECTION_NAME); | |
5517 | if (s != NULL) | |
5518 | { | |
5519 | for (m = elf_seg_map (abfd); m != NULL; m = m->next) | |
5520 | if (m->p_type == PT_RISCV_ATTRIBUTES) | |
5521 | break; | |
5522 | /* If there is already a PT_RISCV_ATTRIBUTES header, avoid adding | |
5523 | another. */ | |
5524 | if (m == NULL) | |
5525 | { | |
5526 | amt = sizeof (*m); | |
5527 | m = bfd_zalloc (abfd, amt); | |
5528 | if (m == NULL) | |
5529 | return false; | |
5530 | ||
5531 | m->p_type = PT_RISCV_ATTRIBUTES; | |
5532 | m->count = 1; | |
5533 | m->sections[0] = s; | |
5534 | ||
5535 | /* We want to put it after the PHDR and INTERP segments. */ | |
5536 | pm = &elf_seg_map (abfd); | |
5537 | while (*pm != NULL | |
5538 | && ((*pm)->p_type == PT_PHDR | |
5539 | || (*pm)->p_type == PT_INTERP)) | |
5540 | pm = &(*pm)->next; | |
5541 | ||
5542 | m->next = *pm; | |
5543 | *pm = m; | |
5544 | } | |
5545 | } | |
5546 | ||
5547 | return true; | |
5548 | } | |
5549 | ||
8155b853 NC |
5550 | /* Merge non-visibility st_other attributes. */ |
5551 | ||
5552 | static void | |
5553 | riscv_elf_merge_symbol_attribute (struct elf_link_hash_entry *h, | |
5554 | unsigned int st_other, | |
5555 | bool definition ATTRIBUTE_UNUSED, | |
5556 | bool dynamic ATTRIBUTE_UNUSED) | |
5557 | { | |
5558 | unsigned int isym_sto = st_other & ~ELF_ST_VISIBILITY (-1); | |
5559 | unsigned int h_sto = h->other & ~ELF_ST_VISIBILITY (-1); | |
5560 | ||
5561 | if (isym_sto == h_sto) | |
5562 | return; | |
5563 | ||
5564 | if (isym_sto & ~STO_RISCV_VARIANT_CC) | |
5565 | _bfd_error_handler (_("unknown attribute for symbol `%s': 0x%02x"), | |
5566 | h->root.root.string, isym_sto); | |
5567 | ||
5568 | if (isym_sto & STO_RISCV_VARIANT_CC) | |
5569 | h->other |= STO_RISCV_VARIANT_CC; | |
5570 | } | |
5571 | ||
1942a048 NC |
5572 | #define TARGET_LITTLE_SYM riscv_elfNN_vec |
5573 | #define TARGET_LITTLE_NAME "elfNN-littleriscv" | |
5574 | #define TARGET_BIG_SYM riscv_elfNN_be_vec | |
5575 | #define TARGET_BIG_NAME "elfNN-bigriscv" | |
e23eba97 | 5576 | |
1942a048 | 5577 | #define elf_backend_reloc_type_class riscv_reloc_type_class |
e23eba97 | 5578 | |
1942a048 NC |
5579 | #define bfd_elfNN_bfd_reloc_name_lookup riscv_reloc_name_lookup |
5580 | #define bfd_elfNN_bfd_link_hash_table_create riscv_elf_link_hash_table_create | |
5581 | #define bfd_elfNN_bfd_reloc_type_lookup riscv_reloc_type_lookup | |
e23eba97 NC |
5582 | #define bfd_elfNN_bfd_merge_private_bfd_data \ |
5583 | _bfd_riscv_elf_merge_private_bfd_data | |
ddfe525f | 5584 | #define bfd_elfNN_bfd_is_target_special_symbol riscv_elf_is_target_special_symbol |
e23eba97 | 5585 | |
1942a048 NC |
5586 | #define elf_backend_copy_indirect_symbol riscv_elf_copy_indirect_symbol |
5587 | #define elf_backend_create_dynamic_sections riscv_elf_create_dynamic_sections | |
5588 | #define elf_backend_check_relocs riscv_elf_check_relocs | |
5589 | #define elf_backend_adjust_dynamic_symbol riscv_elf_adjust_dynamic_symbol | |
5590 | #define elf_backend_size_dynamic_sections riscv_elf_size_dynamic_sections | |
5591 | #define elf_backend_relocate_section riscv_elf_relocate_section | |
5592 | #define elf_backend_finish_dynamic_symbol riscv_elf_finish_dynamic_symbol | |
5593 | #define elf_backend_finish_dynamic_sections riscv_elf_finish_dynamic_sections | |
1942a048 NC |
5594 | #define elf_backend_plt_sym_val riscv_elf_plt_sym_val |
5595 | #define elf_backend_grok_prstatus riscv_elf_grok_prstatus | |
5596 | #define elf_backend_grok_psinfo riscv_elf_grok_psinfo | |
5597 | #define elf_backend_object_p riscv_elf_object_p | |
0897bb7d | 5598 | #define elf_backend_write_core_note riscv_write_core_note |
9b9b1092 | 5599 | #define elf_backend_maybe_function_sym riscv_maybe_function_sym |
1942a048 NC |
5600 | #define elf_info_to_howto_rel NULL |
5601 | #define elf_info_to_howto riscv_info_to_howto_rela | |
5602 | #define bfd_elfNN_bfd_relax_section _bfd_riscv_relax_section | |
5603 | #define bfd_elfNN_mkobject elfNN_riscv_mkobject | |
fbc95f1e KC |
5604 | #define elf_backend_additional_program_headers \ |
5605 | riscv_elf_additional_program_headers | |
5606 | #define elf_backend_modify_segment_map riscv_elf_modify_segment_map | |
8155b853 | 5607 | #define elf_backend_merge_symbol_attribute riscv_elf_merge_symbol_attribute |
1942a048 NC |
5608 | |
5609 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section | |
5610 | ||
5611 | #define elf_backend_can_gc_sections 1 | |
5612 | #define elf_backend_can_refcount 1 | |
5613 | #define elf_backend_want_got_plt 1 | |
5614 | #define elf_backend_plt_readonly 1 | |
5615 | #define elf_backend_plt_alignment 4 | |
5616 | #define elf_backend_want_plt_sym 1 | |
5617 | #define elf_backend_got_header_size (ARCH_SIZE / 8) | |
5618 | #define elf_backend_want_dynrelro 1 | |
5619 | #define elf_backend_rela_normal 1 | |
5620 | #define elf_backend_default_execstack 0 | |
e23eba97 | 5621 | |
2dc8dd17 | 5622 | #undef elf_backend_obj_attrs_vendor |
1942a048 | 5623 | #define elf_backend_obj_attrs_vendor "riscv" |
2dc8dd17 | 5624 | #undef elf_backend_obj_attrs_arg_type |
1942a048 | 5625 | #define elf_backend_obj_attrs_arg_type riscv_elf_obj_attrs_arg_type |
2dc8dd17 | 5626 | #undef elf_backend_obj_attrs_section_type |
1942a048 | 5627 | #define elf_backend_obj_attrs_section_type SHT_RISCV_ATTRIBUTES |
2dc8dd17 | 5628 | #undef elf_backend_obj_attrs_section |
fbc95f1e | 5629 | #define elf_backend_obj_attrs_section RISCV_ATTRIBUTES_SECTION_NAME |
2dc8dd17 | 5630 | |
e23eba97 | 5631 | #include "elfNN-target.h" |