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