1 /* RISC-V-specific support for NN-bit ELF.
2 Copyright (C) 2011-2021 Free Software Foundation, Inc.
4 Contributed by Andrew Waterman (andrew@sifive.com).
5 Based on TILE-Gx and MIPS targets.
7 This file is part of BFD, the Binary File Descriptor library.
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.
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.
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/>. */
23 /* This file handles RISC-V ELF targets. */
31 #include "elfxx-riscv.h"
32 #include "elf/riscv.h"
33 #include "opcode/riscv.h"
43 /* Internal relocations used exclusively by the relaxation pass. */
44 #define R_RISCV_DELETE (R_RISCV_max + 1)
48 #define MINUS_ONE ((bfd_vma)0 - 1)
50 #define RISCV_ELF_LOG_WORD_BYTES (ARCH_SIZE == 32 ? 2 : 3)
52 #define RISCV_ELF_WORD_BYTES (1 << RISCV_ELF_LOG_WORD_BYTES)
54 /* The name of the dynamic interpreter. This is put in the .interp
57 #define ELF64_DYNAMIC_INTERPRETER "/lib/ld.so.1"
58 #define ELF32_DYNAMIC_INTERPRETER "/lib32/ld.so.1"
60 #define ELF_ARCH bfd_arch_riscv
61 #define ELF_TARGET_ID RISCV_ELF_DATA
62 #define ELF_MACHINE_CODE EM_RISCV
63 #define ELF_MAXPAGESIZE 0x1000
64 #define ELF_COMMONPAGESIZE 0x1000
66 /* RISC-V ELF linker hash entry. */
68 struct riscv_elf_link_hash_entry
70 struct elf_link_hash_entry elf
;
80 #define riscv_elf_hash_entry(ent) \
81 ((struct riscv_elf_link_hash_entry *)(ent))
83 struct _bfd_riscv_elf_obj_tdata
85 struct elf_obj_tdata root
;
87 /* tls_type for each local got entry. */
88 char *local_got_tls_type
;
91 #define _bfd_riscv_elf_tdata(abfd) \
92 ((struct _bfd_riscv_elf_obj_tdata *) (abfd)->tdata.any)
94 #define _bfd_riscv_elf_local_got_tls_type(abfd) \
95 (_bfd_riscv_elf_tdata (abfd)->local_got_tls_type)
97 #define _bfd_riscv_elf_tls_type(abfd, h, symndx) \
98 (*((h) != NULL ? &riscv_elf_hash_entry (h)->tls_type \
99 : &_bfd_riscv_elf_local_got_tls_type (abfd) [symndx]))
101 #define is_riscv_elf(bfd) \
102 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
103 && elf_tdata (bfd) != NULL \
104 && elf_object_id (bfd) == RISCV_ELF_DATA)
107 elfNN_riscv_mkobject (bfd
*abfd
)
109 return bfd_elf_allocate_object (abfd
,
110 sizeof (struct _bfd_riscv_elf_obj_tdata
),
114 #include "elf/common.h"
115 #include "elf/internal.h"
117 struct riscv_elf_link_hash_table
119 struct elf_link_hash_table elf
;
121 /* Short-cuts to get to dynamic linker sections. */
124 /* The max alignment of output sections. */
125 bfd_vma max_alignment
;
127 /* Used by local STT_GNU_IFUNC symbols. */
128 htab_t loc_hash_table
;
129 void * loc_hash_memory
;
131 /* The index of the last unused .rel.iplt slot. */
132 bfd_vma last_iplt_index
;
135 /* Instruction access functions. */
136 #define riscv_get_insn(bits, ptr) \
137 ((bits) == 16 ? bfd_getl16 (ptr) \
138 : (bits) == 32 ? bfd_getl32 (ptr) \
139 : (bits) == 64 ? bfd_getl64 (ptr) \
140 : (abort (), (bfd_vma) - 1))
141 #define riscv_put_insn(bits, val, ptr) \
142 ((bits) == 16 ? bfd_putl16 (val, ptr) \
143 : (bits) == 32 ? bfd_putl32 (val, ptr) \
144 : (bits) == 64 ? bfd_putl64 (val, ptr) \
145 : (abort (), (void) 0))
147 /* Get the RISC-V ELF linker hash table from a link_info structure. */
148 #define riscv_elf_hash_table(p) \
149 ((is_elf_hash_table ((p)->hash) \
150 && elf_hash_table_id (elf_hash_table (p)) == RISCV_ELF_DATA) \
151 ? (struct riscv_elf_link_hash_table *) (p)->hash : NULL)
154 riscv_info_to_howto_rela (bfd
*abfd
,
156 Elf_Internal_Rela
*dst
)
158 cache_ptr
->howto
= riscv_elf_rtype_to_howto (abfd
, ELFNN_R_TYPE (dst
->r_info
));
159 return cache_ptr
->howto
!= NULL
;
163 riscv_elf_append_rela (bfd
*abfd
, asection
*s
, Elf_Internal_Rela
*rel
)
165 const struct elf_backend_data
*bed
;
168 bed
= get_elf_backend_data (abfd
);
169 loc
= s
->contents
+ (s
->reloc_count
++ * bed
->s
->sizeof_rela
);
170 bed
->s
->swap_reloca_out (abfd
, rel
, loc
);
173 /* Return true if a relocation is modifying an instruction. */
176 riscv_is_insn_reloc (const reloc_howto_type
*howto
)
178 /* Heuristic: A multibyte destination with a nontrivial mask
180 return (howto
->bitsize
> 8
181 && howto
->dst_mask
!= 0
182 && ~(howto
->dst_mask
| (howto
->bitsize
< sizeof(bfd_vma
) * CHAR_BIT
183 ? (MINUS_ONE
<< howto
->bitsize
) : (bfd_vma
)0)) != 0);
187 #define PLT_HEADER_INSNS 8
188 #define PLT_ENTRY_INSNS 4
189 #define PLT_HEADER_SIZE (PLT_HEADER_INSNS * 4)
190 #define PLT_ENTRY_SIZE (PLT_ENTRY_INSNS * 4)
191 #define GOT_ENTRY_SIZE RISCV_ELF_WORD_BYTES
192 /* Reserve two entries of GOTPLT for ld.so, one is used for PLT resolver,
193 the other is used for link map. Other targets also reserve one more
194 entry used for runtime profile? */
195 #define GOTPLT_HEADER_SIZE (2 * GOT_ENTRY_SIZE)
197 #define sec_addr(sec) ((sec)->output_section->vma + (sec)->output_offset)
200 # define MATCH_LREG MATCH_LW
202 # define MATCH_LREG MATCH_LD
205 /* Generate a PLT header. */
208 riscv_make_plt_header (bfd
*output_bfd
, bfd_vma gotplt_addr
, bfd_vma addr
,
211 bfd_vma gotplt_offset_high
= RISCV_PCREL_HIGH_PART (gotplt_addr
, addr
);
212 bfd_vma gotplt_offset_low
= RISCV_PCREL_LOW_PART (gotplt_addr
, addr
);
214 /* RVE has no t3 register, so this won't work, and is not supported. */
215 if (elf_elfheader (output_bfd
)->e_flags
& EF_RISCV_RVE
)
217 _bfd_error_handler (_("%pB: warning: RVE PLT generation not supported"),
222 /* auipc t2, %hi(.got.plt)
223 sub t1, t1, t3 # shifted .got.plt offset + hdr size + 12
224 l[w|d] t3, %lo(.got.plt)(t2) # _dl_runtime_resolve
225 addi t1, t1, -(hdr size + 12) # shifted .got.plt offset
226 addi t0, t2, %lo(.got.plt) # &.got.plt
227 srli t1, t1, log2(16/PTRSIZE) # .got.plt offset
228 l[w|d] t0, PTRSIZE(t0) # link map
231 entry
[0] = RISCV_UTYPE (AUIPC
, X_T2
, gotplt_offset_high
);
232 entry
[1] = RISCV_RTYPE (SUB
, X_T1
, X_T1
, X_T3
);
233 entry
[2] = RISCV_ITYPE (LREG
, X_T3
, X_T2
, gotplt_offset_low
);
234 entry
[3] = RISCV_ITYPE (ADDI
, X_T1
, X_T1
, (uint32_t) -(PLT_HEADER_SIZE
+ 12));
235 entry
[4] = RISCV_ITYPE (ADDI
, X_T0
, X_T2
, gotplt_offset_low
);
236 entry
[5] = RISCV_ITYPE (SRLI
, X_T1
, X_T1
, 4 - RISCV_ELF_LOG_WORD_BYTES
);
237 entry
[6] = RISCV_ITYPE (LREG
, X_T0
, X_T0
, RISCV_ELF_WORD_BYTES
);
238 entry
[7] = RISCV_ITYPE (JALR
, 0, X_T3
, 0);
243 /* Generate a PLT entry. */
246 riscv_make_plt_entry (bfd
*output_bfd
, bfd_vma got
, bfd_vma addr
,
249 /* RVE has no t3 register, so this won't work, and is not supported. */
250 if (elf_elfheader (output_bfd
)->e_flags
& EF_RISCV_RVE
)
252 _bfd_error_handler (_("%pB: warning: RVE PLT generation not supported"),
257 /* auipc t3, %hi(.got.plt entry)
258 l[w|d] t3, %lo(.got.plt entry)(t3)
262 entry
[0] = RISCV_UTYPE (AUIPC
, X_T3
, RISCV_PCREL_HIGH_PART (got
, addr
));
263 entry
[1] = RISCV_ITYPE (LREG
, X_T3
, X_T3
, RISCV_PCREL_LOW_PART (got
, addr
));
264 entry
[2] = RISCV_ITYPE (JALR
, X_T1
, X_T3
, 0);
265 entry
[3] = RISCV_NOP
;
270 /* Create an entry in an RISC-V ELF linker hash table. */
272 static struct bfd_hash_entry
*
273 link_hash_newfunc (struct bfd_hash_entry
*entry
,
274 struct bfd_hash_table
*table
, const char *string
)
276 /* Allocate the structure if it has not already been allocated by a
281 bfd_hash_allocate (table
,
282 sizeof (struct riscv_elf_link_hash_entry
));
287 /* Call the allocation method of the superclass. */
288 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
291 struct riscv_elf_link_hash_entry
*eh
;
293 eh
= (struct riscv_elf_link_hash_entry
*) entry
;
294 eh
->tls_type
= GOT_UNKNOWN
;
300 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
301 for local symbol so that we can handle local STT_GNU_IFUNC symbols
302 as global symbol. We reuse indx and dynstr_index for local symbol
303 hash since they aren't used by global symbols in this backend. */
306 riscv_elf_local_htab_hash (const void *ptr
)
308 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*) ptr
;
309 return ELF_LOCAL_SYMBOL_HASH (h
->indx
, h
->dynstr_index
);
312 /* Compare local hash entries. */
315 riscv_elf_local_htab_eq (const void *ptr1
, const void *ptr2
)
317 struct elf_link_hash_entry
*h1
= (struct elf_link_hash_entry
*) ptr1
;
318 struct elf_link_hash_entry
*h2
= (struct elf_link_hash_entry
*) ptr2
;
320 return h1
->indx
== h2
->indx
&& h1
->dynstr_index
== h2
->dynstr_index
;
323 /* Find and/or create a hash entry for local symbol. */
325 static struct elf_link_hash_entry
*
326 riscv_elf_get_local_sym_hash (struct riscv_elf_link_hash_table
*htab
,
327 bfd
*abfd
, const Elf_Internal_Rela
*rel
,
330 struct riscv_elf_link_hash_entry eh
, *ret
;
331 asection
*sec
= abfd
->sections
;
332 hashval_t h
= ELF_LOCAL_SYMBOL_HASH (sec
->id
,
333 ELFNN_R_SYM (rel
->r_info
));
336 eh
.elf
.indx
= sec
->id
;
337 eh
.elf
.dynstr_index
= ELFNN_R_SYM (rel
->r_info
);
338 slot
= htab_find_slot_with_hash (htab
->loc_hash_table
, &eh
, h
,
339 create
? INSERT
: NO_INSERT
);
346 ret
= (struct riscv_elf_link_hash_entry
*) *slot
;
350 ret
= (struct riscv_elf_link_hash_entry
*)
351 objalloc_alloc ((struct objalloc
*) htab
->loc_hash_memory
,
352 sizeof (struct riscv_elf_link_hash_entry
));
355 memset (ret
, 0, sizeof (*ret
));
356 ret
->elf
.indx
= sec
->id
;
357 ret
->elf
.dynstr_index
= ELFNN_R_SYM (rel
->r_info
);
358 ret
->elf
.dynindx
= -1;
364 /* Destroy a RISC-V elf linker hash table. */
367 riscv_elf_link_hash_table_free (bfd
*obfd
)
369 struct riscv_elf_link_hash_table
*ret
370 = (struct riscv_elf_link_hash_table
*) obfd
->link
.hash
;
372 if (ret
->loc_hash_table
)
373 htab_delete (ret
->loc_hash_table
);
374 if (ret
->loc_hash_memory
)
375 objalloc_free ((struct objalloc
*) ret
->loc_hash_memory
);
377 _bfd_elf_link_hash_table_free (obfd
);
380 /* Create a RISC-V ELF linker hash table. */
382 static struct bfd_link_hash_table
*
383 riscv_elf_link_hash_table_create (bfd
*abfd
)
385 struct riscv_elf_link_hash_table
*ret
;
386 size_t amt
= sizeof (struct riscv_elf_link_hash_table
);
388 ret
= (struct riscv_elf_link_hash_table
*) bfd_zmalloc (amt
);
392 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
, link_hash_newfunc
,
393 sizeof (struct riscv_elf_link_hash_entry
),
400 ret
->max_alignment
= (bfd_vma
) -1;
402 /* Create hash table for local ifunc. */
403 ret
->loc_hash_table
= htab_try_create (1024,
404 riscv_elf_local_htab_hash
,
405 riscv_elf_local_htab_eq
,
407 ret
->loc_hash_memory
= objalloc_create ();
408 if (!ret
->loc_hash_table
|| !ret
->loc_hash_memory
)
410 riscv_elf_link_hash_table_free (abfd
);
413 ret
->elf
.root
.hash_table_free
= riscv_elf_link_hash_table_free
;
415 return &ret
->elf
.root
;
418 /* Create the .got section. */
421 riscv_elf_create_got_section (bfd
*abfd
, struct bfd_link_info
*info
)
425 struct elf_link_hash_entry
*h
;
426 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
427 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
429 /* This function may be called more than once. */
430 if (htab
->sgot
!= NULL
)
433 flags
= bed
->dynamic_sec_flags
;
435 s
= bfd_make_section_anyway_with_flags (abfd
,
436 (bed
->rela_plts_and_copies_p
437 ? ".rela.got" : ".rel.got"),
438 (bed
->dynamic_sec_flags
441 || !bfd_set_section_alignment (s
, bed
->s
->log_file_align
))
445 s
= s_got
= bfd_make_section_anyway_with_flags (abfd
, ".got", flags
);
447 || !bfd_set_section_alignment (s
, bed
->s
->log_file_align
))
451 /* The first bit of the global offset table is the header. */
452 s
->size
+= bed
->got_header_size
;
454 if (bed
->want_got_plt
)
456 s
= bfd_make_section_anyway_with_flags (abfd
, ".got.plt", flags
);
458 || !bfd_set_section_alignment (s
, bed
->s
->log_file_align
))
462 /* Reserve room for the header. */
463 s
->size
+= GOTPLT_HEADER_SIZE
;
466 if (bed
->want_got_sym
)
468 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
469 section. We don't do this in the linker script because we don't want
470 to define the symbol if we are not creating a global offset
472 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s_got
,
473 "_GLOBAL_OFFSET_TABLE_");
474 elf_hash_table (info
)->hgot
= h
;
482 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
483 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
487 riscv_elf_create_dynamic_sections (bfd
*dynobj
,
488 struct bfd_link_info
*info
)
490 struct riscv_elf_link_hash_table
*htab
;
492 htab
= riscv_elf_hash_table (info
);
493 BFD_ASSERT (htab
!= NULL
);
495 if (!riscv_elf_create_got_section (dynobj
, info
))
498 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
501 if (!bfd_link_pic (info
))
503 /* Technically, this section doesn't have contents. It is used as the
504 target of TLS copy relocs, to copy TLS data from shared libraries into
505 the executable. However, if we don't mark it as loadable, then it
506 matches the IS_TBSS test in ldlang.c, and there is no run-time address
507 space allocated for it even though it has SEC_ALLOC. That test is
508 correct for .tbss, but not correct for this section. There is also
509 a second problem that having a section with no contents can only work
510 if it comes after all sections with contents in the same segment,
511 but the linker script does not guarantee that. This is just mixed in
512 with other .tdata.* sections. We can fix both problems by lying and
513 saying that there are contents. This section is expected to be small
514 so this should not cause a significant extra program startup cost. */
516 bfd_make_section_anyway_with_flags (dynobj
, ".tdata.dyn",
517 (SEC_ALLOC
| SEC_THREAD_LOCAL
518 | SEC_LOAD
| SEC_DATA
520 | SEC_LINKER_CREATED
));
523 if (!htab
->elf
.splt
|| !htab
->elf
.srelplt
|| !htab
->elf
.sdynbss
524 || (!bfd_link_pic (info
) && (!htab
->elf
.srelbss
|| !htab
->sdyntdata
)))
530 /* Copy the extra info we tack onto an elf_link_hash_entry. */
533 riscv_elf_copy_indirect_symbol (struct bfd_link_info
*info
,
534 struct elf_link_hash_entry
*dir
,
535 struct elf_link_hash_entry
*ind
)
537 struct riscv_elf_link_hash_entry
*edir
, *eind
;
539 edir
= (struct riscv_elf_link_hash_entry
*) dir
;
540 eind
= (struct riscv_elf_link_hash_entry
*) ind
;
542 if (ind
->root
.type
== bfd_link_hash_indirect
543 && dir
->got
.refcount
<= 0)
545 edir
->tls_type
= eind
->tls_type
;
546 eind
->tls_type
= GOT_UNKNOWN
;
548 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
552 riscv_elf_record_tls_type (bfd
*abfd
, struct elf_link_hash_entry
*h
,
553 unsigned long symndx
, char tls_type
)
555 char *new_tls_type
= &_bfd_riscv_elf_tls_type (abfd
, h
, symndx
);
557 *new_tls_type
|= tls_type
;
558 if ((*new_tls_type
& GOT_NORMAL
) && (*new_tls_type
& ~GOT_NORMAL
))
560 (*_bfd_error_handler
)
561 (_("%pB: `%s' accessed both as normal and thread local symbol"),
562 abfd
, h
? h
->root
.root
.string
: "<local>");
569 riscv_elf_record_got_reference (bfd
*abfd
, struct bfd_link_info
*info
,
570 struct elf_link_hash_entry
*h
, long symndx
)
572 struct riscv_elf_link_hash_table
*htab
= riscv_elf_hash_table (info
);
573 Elf_Internal_Shdr
*symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
575 if (htab
->elf
.sgot
== NULL
)
577 if (!riscv_elf_create_got_section (htab
->elf
.dynobj
, info
))
583 h
->got
.refcount
+= 1;
587 /* This is a global offset table entry for a local symbol. */
588 if (elf_local_got_refcounts (abfd
) == NULL
)
590 bfd_size_type size
= symtab_hdr
->sh_info
* (sizeof (bfd_vma
) + 1);
591 if (!(elf_local_got_refcounts (abfd
) = bfd_zalloc (abfd
, size
)))
593 _bfd_riscv_elf_local_got_tls_type (abfd
)
594 = (char *) (elf_local_got_refcounts (abfd
) + symtab_hdr
->sh_info
);
596 elf_local_got_refcounts (abfd
) [symndx
] += 1;
602 bad_static_reloc (bfd
*abfd
, unsigned r_type
, struct elf_link_hash_entry
*h
)
604 reloc_howto_type
* r
= riscv_elf_rtype_to_howto (abfd
, r_type
);
606 /* We propably can improve the information to tell users that they
607 should be recompile the code with -fPIC or -fPIE, just like what
609 (*_bfd_error_handler
)
610 (_("%pB: relocation %s against `%s' can not be used when making a shared "
611 "object; recompile with -fPIC"),
612 abfd
, r
? r
->name
: _("<unknown>"),
613 h
!= NULL
? h
->root
.root
.string
: "a local symbol");
614 bfd_set_error (bfd_error_bad_value
);
618 /* Look through the relocs for a section during the first phase, and
619 allocate space in the global offset table or procedure linkage
623 riscv_elf_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
624 asection
*sec
, const Elf_Internal_Rela
*relocs
)
626 struct riscv_elf_link_hash_table
*htab
;
627 Elf_Internal_Shdr
*symtab_hdr
;
628 struct elf_link_hash_entry
**sym_hashes
;
629 const Elf_Internal_Rela
*rel
;
630 asection
*sreloc
= NULL
;
632 if (bfd_link_relocatable (info
))
635 htab
= riscv_elf_hash_table (info
);
636 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
637 sym_hashes
= elf_sym_hashes (abfd
);
639 if (htab
->elf
.dynobj
== NULL
)
640 htab
->elf
.dynobj
= abfd
;
642 for (rel
= relocs
; rel
< relocs
+ sec
->reloc_count
; rel
++)
645 unsigned int r_symndx
;
646 struct elf_link_hash_entry
*h
;
648 r_symndx
= ELFNN_R_SYM (rel
->r_info
);
649 r_type
= ELFNN_R_TYPE (rel
->r_info
);
651 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
653 (*_bfd_error_handler
) (_("%pB: bad symbol index: %d"),
658 if (r_symndx
< symtab_hdr
->sh_info
)
660 /* A local symbol. */
661 Elf_Internal_Sym
*isym
= bfd_sym_from_r_symndx (&htab
->elf
.sym_cache
,
666 /* Check relocation against local STT_GNU_IFUNC symbol. */
667 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
669 h
= riscv_elf_get_local_sym_hash (htab
, abfd
, rel
, TRUE
);
673 /* Fake STT_GNU_IFUNC global symbol. */
674 h
->root
.root
.string
= bfd_elf_sym_name (abfd
, symtab_hdr
,
676 h
->type
= STT_GNU_IFUNC
;
680 h
->root
.type
= bfd_link_hash_defined
;
687 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
688 while (h
->root
.type
== bfd_link_hash_indirect
689 || h
->root
.type
== bfd_link_hash_warning
)
690 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
700 case R_RISCV_CALL_PLT
:
702 case R_RISCV_GOT_HI20
:
703 case R_RISCV_PCREL_HI20
:
704 /* Create the ifunc sections, iplt and ipltgot, for static
706 if (h
->type
== STT_GNU_IFUNC
707 && !_bfd_elf_create_ifunc_sections (htab
->elf
.dynobj
, info
))
715 /* It is referenced by a non-shared object. */
721 case R_RISCV_TLS_GD_HI20
:
722 if (!riscv_elf_record_got_reference (abfd
, info
, h
, r_symndx
)
723 || !riscv_elf_record_tls_type (abfd
, h
, r_symndx
, GOT_TLS_GD
))
727 case R_RISCV_TLS_GOT_HI20
:
728 if (bfd_link_pic (info
))
729 info
->flags
|= DF_STATIC_TLS
;
730 if (!riscv_elf_record_got_reference (abfd
, info
, h
, r_symndx
)
731 || !riscv_elf_record_tls_type (abfd
, h
, r_symndx
, GOT_TLS_IE
))
735 case R_RISCV_GOT_HI20
:
736 if (!riscv_elf_record_got_reference (abfd
, info
, h
, r_symndx
)
737 || !riscv_elf_record_tls_type (abfd
, h
, r_symndx
, GOT_NORMAL
))
742 case R_RISCV_CALL_PLT
:
743 /* These symbol requires a procedure linkage table entry.
744 We actually build the entry in adjust_dynamic_symbol,
745 because these might be a case of linking PIC code without
746 linking in any dynamic objects, in which case we don't
747 need to generate a procedure linkage table after all. */
749 /* If it is a local symbol, then we resolve it directly
750 without creating a PLT entry. */
755 h
->plt
.refcount
+= 1;
758 case R_RISCV_PCREL_HI20
:
760 && h
->type
== STT_GNU_IFUNC
)
763 h
->pointer_equality_needed
= 1;
765 /* We don't use the PCREL_HI20 in the data section,
766 so we always need the plt when it refers to
768 h
->plt
.refcount
+= 1;
774 case R_RISCV_RVC_BRANCH
:
775 case R_RISCV_RVC_JUMP
:
776 /* In shared libraries and pie, these relocs are known
778 if (bfd_link_pic (info
))
782 case R_RISCV_TPREL_HI20
:
783 if (!bfd_link_executable (info
))
784 return bad_static_reloc (abfd
, r_type
, h
);
786 riscv_elf_record_tls_type (abfd
, h
, r_symndx
, GOT_TLS_LE
);
790 if (bfd_link_pic (info
))
791 return bad_static_reloc (abfd
, r_type
, h
);
795 case R_RISCV_JUMP_SLOT
:
796 case R_RISCV_RELATIVE
:
804 && (!bfd_link_pic (info
)
805 || h
->type
== STT_GNU_IFUNC
))
807 /* This reloc might not bind locally. */
809 h
->pointer_equality_needed
= 1;
812 || (sec
->flags
& (SEC_CODE
| SEC_READONLY
)) != 0)
814 /* We may need a .plt entry if the symbol is a function
815 defined in a shared lib or is a function referenced
816 from the code or read-only section. */
817 h
->plt
.refcount
+= 1;
821 /* If we are creating a shared library, and this is a reloc
822 against a global symbol, or a non PC relative reloc
823 against a local symbol, then we need to copy the reloc
824 into the shared library. However, if we are linking with
825 -Bsymbolic, we do not need to copy a reloc against a
826 global symbol which is defined in an object we are
827 including in the link (i.e., DEF_REGULAR is set). At
828 this point we have not seen all the input files, so it is
829 possible that DEF_REGULAR is not set now but will be set
830 later (it is never cleared). In case of a weak definition,
831 DEF_REGULAR may be cleared later by a strong definition in
832 a shared library. We account for that possibility below by
833 storing information in the relocs_copied field of the hash
834 table entry. A similar situation occurs when creating
835 shared libraries and symbol visibility changes render the
838 If on the other hand, we are creating an executable, we
839 may need to keep relocations for symbols satisfied by a
840 dynamic library if we manage to avoid copy relocs for the
843 Generate dynamic pointer relocation against STT_GNU_IFUNC
844 symbol in the non-code section (R_RISCV_32/R_RISCV_64). */
845 reloc_howto_type
* r
= riscv_elf_rtype_to_howto (abfd
, r_type
);
847 if ((bfd_link_pic (info
)
848 && (sec
->flags
& SEC_ALLOC
) != 0
849 && ((r
!= NULL
&& !r
->pc_relative
)
852 || h
->root
.type
== bfd_link_hash_defweak
853 || !h
->def_regular
))))
854 || (!bfd_link_pic (info
)
855 && (sec
->flags
& SEC_ALLOC
) != 0
857 && (h
->root
.type
== bfd_link_hash_defweak
859 || (!bfd_link_pic (info
)
861 && h
->type
== STT_GNU_IFUNC
862 && (sec
->flags
& SEC_CODE
) == 0))
864 struct elf_dyn_relocs
*p
;
865 struct elf_dyn_relocs
**head
;
867 /* When creating a shared object, we must copy these
868 relocs into the output file. We create a reloc
869 section in dynobj and make room for the reloc. */
872 sreloc
= _bfd_elf_make_dynamic_reloc_section
873 (sec
, htab
->elf
.dynobj
, RISCV_ELF_LOG_WORD_BYTES
,
874 abfd
, /*rela?*/ TRUE
);
880 /* If this is a global symbol, we count the number of
881 relocations we need for this symbol. */
883 head
= &h
->dyn_relocs
;
886 /* Track dynamic relocs needed for local syms too.
887 We really need local syms available to do this
892 Elf_Internal_Sym
*isym
;
894 isym
= bfd_sym_from_r_symndx (&htab
->elf
.sym_cache
,
899 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
903 vpp
= &elf_section_data (s
)->local_dynrel
;
904 head
= (struct elf_dyn_relocs
**) vpp
;
908 if (p
== NULL
|| p
->sec
!= sec
)
910 size_t amt
= sizeof *p
;
911 p
= ((struct elf_dyn_relocs
*)
912 bfd_alloc (htab
->elf
.dynobj
, amt
));
923 p
->pc_count
+= r
== NULL
? 0 : r
->pc_relative
;
928 case R_RISCV_GNU_VTINHERIT
:
929 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
933 case R_RISCV_GNU_VTENTRY
:
934 if (!bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
947 riscv_elf_gc_mark_hook (asection
*sec
,
948 struct bfd_link_info
*info
,
949 Elf_Internal_Rela
*rel
,
950 struct elf_link_hash_entry
*h
,
951 Elf_Internal_Sym
*sym
)
954 switch (ELFNN_R_TYPE (rel
->r_info
))
956 case R_RISCV_GNU_VTINHERIT
:
957 case R_RISCV_GNU_VTENTRY
:
961 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
964 /* Adjust a symbol defined by a dynamic object and referenced by a
965 regular object. The current definition is in some section of the
966 dynamic object, but we're not including those sections. We have to
967 change the definition to something the rest of the link can
971 riscv_elf_adjust_dynamic_symbol (struct bfd_link_info
*info
,
972 struct elf_link_hash_entry
*h
)
974 struct riscv_elf_link_hash_table
*htab
;
975 struct riscv_elf_link_hash_entry
* eh
;
979 htab
= riscv_elf_hash_table (info
);
980 BFD_ASSERT (htab
!= NULL
);
982 dynobj
= htab
->elf
.dynobj
;
984 /* Make sure we know what is going on here. */
985 BFD_ASSERT (dynobj
!= NULL
987 || h
->type
== STT_GNU_IFUNC
991 && !h
->def_regular
)));
993 /* If this is a function, put it in the procedure linkage table. We
994 will fill in the contents of the procedure linkage table later
995 (although we could actually do it here). */
996 if (h
->type
== STT_FUNC
|| h
->type
== STT_GNU_IFUNC
|| h
->needs_plt
)
998 if (h
->plt
.refcount
<= 0
999 || (h
->type
!= STT_GNU_IFUNC
1000 && (SYMBOL_CALLS_LOCAL (info
, h
)
1001 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1002 && h
->root
.type
== bfd_link_hash_undefweak
))))
1004 /* This case can occur if we saw a R_RISCV_CALL_PLT reloc in an
1005 input file, but the symbol was never referred to by a dynamic
1006 object, or if all references were garbage collected. In such
1007 a case, we don't actually need to build a PLT entry. */
1008 h
->plt
.offset
= (bfd_vma
) -1;
1015 h
->plt
.offset
= (bfd_vma
) -1;
1017 /* If this is a weak symbol, and there is a real definition, the
1018 processor independent code will have arranged for us to see the
1019 real definition first, and we can just use the same value. */
1020 if (h
->is_weakalias
)
1022 struct elf_link_hash_entry
*def
= weakdef (h
);
1023 BFD_ASSERT (def
->root
.type
== bfd_link_hash_defined
);
1024 h
->root
.u
.def
.section
= def
->root
.u
.def
.section
;
1025 h
->root
.u
.def
.value
= def
->root
.u
.def
.value
;
1029 /* This is a reference to a symbol defined by a dynamic object which
1030 is not a function. */
1032 /* If we are creating a shared library, we must presume that the
1033 only references to the symbol are via the global offset table.
1034 For such cases we need not do anything here; the relocations will
1035 be handled correctly by relocate_section. */
1036 if (bfd_link_pic (info
))
1039 /* If there are no references to this symbol that do not use the
1040 GOT, we don't need to generate a copy reloc. */
1041 if (!h
->non_got_ref
)
1044 /* If -z nocopyreloc was given, we won't generate them either. */
1045 if (info
->nocopyreloc
)
1051 /* If we don't find any dynamic relocs in read-only sections, then
1052 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1053 if (!_bfd_elf_readonly_dynrelocs (h
))
1059 /* We must allocate the symbol in our .dynbss section, which will
1060 become part of the .bss section of the executable. There will be
1061 an entry for this symbol in the .dynsym section. The dynamic
1062 object will contain position independent code, so all references
1063 from the dynamic object to this symbol will go through the global
1064 offset table. The dynamic linker will use the .dynsym entry to
1065 determine the address it must put in the global offset table, so
1066 both the dynamic object and the regular object will refer to the
1067 same memory location for the variable. */
1069 /* We must generate a R_RISCV_COPY reloc to tell the dynamic linker
1070 to copy the initial value out of the dynamic object and into the
1071 runtime process image. We need to remember the offset into the
1072 .rel.bss section we are going to use. */
1073 eh
= (struct riscv_elf_link_hash_entry
*) h
;
1074 if (eh
->tls_type
& ~GOT_NORMAL
)
1076 s
= htab
->sdyntdata
;
1077 srel
= htab
->elf
.srelbss
;
1079 else if ((h
->root
.u
.def
.section
->flags
& SEC_READONLY
) != 0)
1081 s
= htab
->elf
.sdynrelro
;
1082 srel
= htab
->elf
.sreldynrelro
;
1086 s
= htab
->elf
.sdynbss
;
1087 srel
= htab
->elf
.srelbss
;
1089 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
1091 srel
->size
+= sizeof (ElfNN_External_Rela
);
1095 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
1098 /* Allocate space in .plt, .got and associated reloc sections for
1102 allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
1104 struct bfd_link_info
*info
;
1105 struct riscv_elf_link_hash_table
*htab
;
1106 struct elf_dyn_relocs
*p
;
1108 if (h
->root
.type
== bfd_link_hash_indirect
)
1111 info
= (struct bfd_link_info
*) inf
;
1112 htab
= riscv_elf_hash_table (info
);
1113 BFD_ASSERT (htab
!= NULL
);
1115 /* When we are generating pde, make sure gp symbol is output as a
1116 dynamic symbol. Then ld.so can set the gp register earlier, before
1117 resolving the ifunc. */
1118 if (!bfd_link_pic (info
)
1119 && htab
->elf
.dynamic_sections_created
1120 && strcmp (h
->root
.root
.string
, RISCV_GP_SYMBOL
) == 0
1121 && !bfd_elf_link_record_dynamic_symbol (info
, h
))
1124 /* Since STT_GNU_IFUNC symbols must go through PLT, we handle them
1125 in the allocate_ifunc_dynrelocs and allocate_local_ifunc_dynrelocs,
1126 if they are defined and referenced in a non-shared object. */
1127 if (h
->type
== STT_GNU_IFUNC
1130 else if (htab
->elf
.dynamic_sections_created
1131 && h
->plt
.refcount
> 0)
1133 /* Make sure this symbol is output as a dynamic symbol.
1134 Undefined weak syms won't yet be marked as dynamic. */
1135 if (h
->dynindx
== -1
1136 && !h
->forced_local
)
1138 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1142 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, bfd_link_pic (info
), h
))
1144 asection
*s
= htab
->elf
.splt
;
1147 s
->size
= PLT_HEADER_SIZE
;
1149 h
->plt
.offset
= s
->size
;
1151 /* Make room for this entry. */
1152 s
->size
+= PLT_ENTRY_SIZE
;
1154 /* We also need to make an entry in the .got.plt section. */
1155 htab
->elf
.sgotplt
->size
+= GOT_ENTRY_SIZE
;
1157 /* We also need to make an entry in the .rela.plt section. */
1158 htab
->elf
.srelplt
->size
+= sizeof (ElfNN_External_Rela
);
1160 /* If this symbol is not defined in a regular file, and we are
1161 not generating a shared library, then set the symbol to this
1162 location in the .plt. This is required to make function
1163 pointers compare as equal between the normal executable and
1164 the shared library. */
1165 if (! bfd_link_pic (info
)
1168 h
->root
.u
.def
.section
= s
;
1169 h
->root
.u
.def
.value
= h
->plt
.offset
;
1174 h
->plt
.offset
= (bfd_vma
) -1;
1180 h
->plt
.offset
= (bfd_vma
) -1;
1184 if (h
->got
.refcount
> 0)
1188 int tls_type
= riscv_elf_hash_entry (h
)->tls_type
;
1190 /* Make sure this symbol is output as a dynamic symbol.
1191 Undefined weak syms won't yet be marked as dynamic. */
1192 if (h
->dynindx
== -1
1193 && !h
->forced_local
)
1195 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1200 h
->got
.offset
= s
->size
;
1201 dyn
= htab
->elf
.dynamic_sections_created
;
1202 if (tls_type
& (GOT_TLS_GD
| GOT_TLS_IE
))
1204 /* TLS_GD needs two dynamic relocs and two GOT slots. */
1205 if (tls_type
& GOT_TLS_GD
)
1207 s
->size
+= 2 * RISCV_ELF_WORD_BYTES
;
1208 htab
->elf
.srelgot
->size
+= 2 * sizeof (ElfNN_External_Rela
);
1211 /* TLS_IE needs one dynamic reloc and one GOT slot. */
1212 if (tls_type
& GOT_TLS_IE
)
1214 s
->size
+= RISCV_ELF_WORD_BYTES
;
1215 htab
->elf
.srelgot
->size
+= sizeof (ElfNN_External_Rela
);
1220 s
->size
+= RISCV_ELF_WORD_BYTES
;
1221 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, bfd_link_pic (info
), h
)
1222 && ! UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
))
1223 htab
->elf
.srelgot
->size
+= sizeof (ElfNN_External_Rela
);
1227 h
->got
.offset
= (bfd_vma
) -1;
1229 if (h
->dyn_relocs
== NULL
)
1232 /* In the shared -Bsymbolic case, discard space allocated for
1233 dynamic pc-relative relocs against symbols which turn out to be
1234 defined in regular objects. For the normal shared case, discard
1235 space for pc-relative relocs that have become local due to symbol
1236 visibility changes. */
1238 if (bfd_link_pic (info
))
1240 if (SYMBOL_CALLS_LOCAL (info
, h
))
1242 struct elf_dyn_relocs
**pp
;
1244 for (pp
= &h
->dyn_relocs
; (p
= *pp
) != NULL
; )
1246 p
->count
-= p
->pc_count
;
1255 /* Also discard relocs on undefined weak syms with non-default
1257 if (h
->dyn_relocs
!= NULL
1258 && h
->root
.type
== bfd_link_hash_undefweak
)
1260 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1261 || UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
))
1262 h
->dyn_relocs
= NULL
;
1264 /* Make sure undefined weak symbols are output as a dynamic
1266 else if (h
->dynindx
== -1
1267 && !h
->forced_local
)
1269 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1276 /* For the non-shared case, discard space for relocs against
1277 symbols which turn out to need copy relocs or are not
1283 || (htab
->elf
.dynamic_sections_created
1284 && (h
->root
.type
== bfd_link_hash_undefweak
1285 || h
->root
.type
== bfd_link_hash_undefined
))))
1287 /* Make sure this symbol is output as a dynamic symbol.
1288 Undefined weak syms won't yet be marked as dynamic. */
1289 if (h
->dynindx
== -1
1290 && !h
->forced_local
)
1292 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1296 /* If that succeeded, we know we'll be keeping all the
1298 if (h
->dynindx
!= -1)
1302 h
->dyn_relocs
= NULL
;
1307 /* Finally, allocate space. */
1308 for (p
= h
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1310 asection
*sreloc
= elf_section_data (p
->sec
)->sreloc
;
1311 sreloc
->size
+= p
->count
* sizeof (ElfNN_External_Rela
);
1317 /* Allocate space in .plt, .got and associated reloc sections for
1318 ifunc dynamic relocs. */
1321 allocate_ifunc_dynrelocs (struct elf_link_hash_entry
*h
,
1324 struct bfd_link_info
*info
;
1326 if (h
->root
.type
== bfd_link_hash_indirect
)
1329 if (h
->root
.type
== bfd_link_hash_warning
)
1330 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1332 info
= (struct bfd_link_info
*) inf
;
1334 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1335 here if it is defined and referenced in a non-shared object. */
1336 if (h
->type
== STT_GNU_IFUNC
1338 return _bfd_elf_allocate_ifunc_dyn_relocs (info
, h
,
1347 /* Allocate space in .plt, .got and associated reloc sections for
1348 local ifunc dynamic relocs. */
1351 allocate_local_ifunc_dynrelocs (void **slot
, void *inf
)
1353 struct elf_link_hash_entry
*h
1354 = (struct elf_link_hash_entry
*) *slot
;
1356 if (h
->type
!= STT_GNU_IFUNC
1360 || h
->root
.type
!= bfd_link_hash_defined
)
1363 return allocate_ifunc_dynrelocs (h
, inf
);
1367 riscv_elf_size_dynamic_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
1369 struct riscv_elf_link_hash_table
*htab
;
1374 htab
= riscv_elf_hash_table (info
);
1375 BFD_ASSERT (htab
!= NULL
);
1376 dynobj
= htab
->elf
.dynobj
;
1377 BFD_ASSERT (dynobj
!= NULL
);
1379 if (elf_hash_table (info
)->dynamic_sections_created
)
1381 /* Set the contents of the .interp section to the interpreter. */
1382 if (bfd_link_executable (info
) && !info
->nointerp
)
1384 s
= bfd_get_linker_section (dynobj
, ".interp");
1385 BFD_ASSERT (s
!= NULL
);
1386 s
->size
= strlen (ELFNN_DYNAMIC_INTERPRETER
) + 1;
1387 s
->contents
= (unsigned char *) ELFNN_DYNAMIC_INTERPRETER
;
1391 /* Set up .got offsets for local syms, and space for local dynamic
1393 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
1395 bfd_signed_vma
*local_got
;
1396 bfd_signed_vma
*end_local_got
;
1397 char *local_tls_type
;
1398 bfd_size_type locsymcount
;
1399 Elf_Internal_Shdr
*symtab_hdr
;
1402 if (! is_riscv_elf (ibfd
))
1405 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
1407 struct elf_dyn_relocs
*p
;
1409 for (p
= elf_section_data (s
)->local_dynrel
; p
!= NULL
; p
= p
->next
)
1411 if (!bfd_is_abs_section (p
->sec
)
1412 && bfd_is_abs_section (p
->sec
->output_section
))
1414 /* Input section has been discarded, either because
1415 it is a copy of a linkonce section or due to
1416 linker script /DISCARD/, so we'll be discarding
1419 else if (p
->count
!= 0)
1421 srel
= elf_section_data (p
->sec
)->sreloc
;
1422 srel
->size
+= p
->count
* sizeof (ElfNN_External_Rela
);
1423 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
1424 info
->flags
|= DF_TEXTREL
;
1429 local_got
= elf_local_got_refcounts (ibfd
);
1433 symtab_hdr
= &elf_symtab_hdr (ibfd
);
1434 locsymcount
= symtab_hdr
->sh_info
;
1435 end_local_got
= local_got
+ locsymcount
;
1436 local_tls_type
= _bfd_riscv_elf_local_got_tls_type (ibfd
);
1438 srel
= htab
->elf
.srelgot
;
1439 for (; local_got
< end_local_got
; ++local_got
, ++local_tls_type
)
1443 *local_got
= s
->size
;
1444 s
->size
+= RISCV_ELF_WORD_BYTES
;
1445 if (*local_tls_type
& GOT_TLS_GD
)
1446 s
->size
+= RISCV_ELF_WORD_BYTES
;
1447 if (bfd_link_pic (info
)
1448 || (*local_tls_type
& (GOT_TLS_GD
| GOT_TLS_IE
)))
1449 srel
->size
+= sizeof (ElfNN_External_Rela
);
1452 *local_got
= (bfd_vma
) -1;
1456 /* Allocate .plt and .got entries and space dynamic relocs for
1458 elf_link_hash_traverse (&htab
->elf
, allocate_dynrelocs
, info
);
1460 /* Allocate .plt and .got entries and space dynamic relocs for
1461 global ifunc symbols. */
1462 elf_link_hash_traverse (&htab
->elf
, allocate_ifunc_dynrelocs
, info
);
1464 /* Allocate .plt and .got entries and space dynamic relocs for
1465 local ifunc symbols. */
1466 htab_traverse (htab
->loc_hash_table
, allocate_local_ifunc_dynrelocs
, info
);
1468 /* Used to resolve the dynamic relocs overwite problems when
1469 generating static executable. */
1470 if (htab
->elf
.irelplt
)
1471 htab
->last_iplt_index
= htab
->elf
.irelplt
->reloc_count
- 1;
1473 if (htab
->elf
.sgotplt
)
1475 struct elf_link_hash_entry
*got
;
1476 got
= elf_link_hash_lookup (elf_hash_table (info
),
1477 "_GLOBAL_OFFSET_TABLE_",
1478 FALSE
, FALSE
, FALSE
);
1480 /* Don't allocate .got.plt section if there are no GOT nor PLT
1481 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
1483 || !got
->ref_regular_nonweak
)
1484 && (htab
->elf
.sgotplt
->size
== GOTPLT_HEADER_SIZE
)
1485 && (htab
->elf
.splt
== NULL
1486 || htab
->elf
.splt
->size
== 0)
1487 && (htab
->elf
.sgot
== NULL
1488 || (htab
->elf
.sgot
->size
1489 == get_elf_backend_data (output_bfd
)->got_header_size
)))
1490 htab
->elf
.sgotplt
->size
= 0;
1493 /* The check_relocs and adjust_dynamic_symbol entry points have
1494 determined the sizes of the various dynamic sections. Allocate
1496 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
1498 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
1501 if (s
== htab
->elf
.splt
1502 || s
== htab
->elf
.sgot
1503 || s
== htab
->elf
.sgotplt
1504 || s
== htab
->elf
.iplt
1505 || s
== htab
->elf
.igotplt
1506 || s
== htab
->elf
.sdynbss
1507 || s
== htab
->elf
.sdynrelro
1508 || s
== htab
->sdyntdata
)
1510 /* Strip this section if we don't need it; see the
1513 else if (strncmp (s
->name
, ".rela", 5) == 0)
1517 /* We use the reloc_count field as a counter if we need
1518 to copy relocs into the output file. */
1524 /* It's not one of our sections. */
1530 /* If we don't need this section, strip it from the
1531 output file. This is mostly to handle .rela.bss and
1532 .rela.plt. We must create both sections in
1533 create_dynamic_sections, because they must be created
1534 before the linker maps input sections to output
1535 sections. The linker does that before
1536 adjust_dynamic_symbol is called, and it is that
1537 function which decides whether anything needs to go
1538 into these sections. */
1539 s
->flags
|= SEC_EXCLUDE
;
1543 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
1546 /* Allocate memory for the section contents. Zero the memory
1547 for the benefit of .rela.plt, which has 4 unused entries
1548 at the beginning, and we don't want garbage. */
1549 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
1550 if (s
->contents
== NULL
)
1554 return _bfd_elf_add_dynamic_tags (output_bfd
, info
, TRUE
);
1558 #define DTP_OFFSET 0x800
1560 /* Return the relocation value for a TLS dtp-relative reloc. */
1563 dtpoff (struct bfd_link_info
*info
, bfd_vma address
)
1565 /* If tls_sec is NULL, we should have signalled an error already. */
1566 if (elf_hash_table (info
)->tls_sec
== NULL
)
1568 return address
- elf_hash_table (info
)->tls_sec
->vma
- DTP_OFFSET
;
1571 /* Return the relocation value for a static TLS tp-relative relocation. */
1574 tpoff (struct bfd_link_info
*info
, bfd_vma address
)
1576 /* If tls_sec is NULL, we should have signalled an error already. */
1577 if (elf_hash_table (info
)->tls_sec
== NULL
)
1579 return address
- elf_hash_table (info
)->tls_sec
->vma
- TP_OFFSET
;
1582 /* Return the global pointer's value, or 0 if it is not in use. */
1585 riscv_global_pointer_value (struct bfd_link_info
*info
)
1587 struct bfd_link_hash_entry
*h
;
1589 h
= bfd_link_hash_lookup (info
->hash
, RISCV_GP_SYMBOL
, FALSE
, FALSE
, TRUE
);
1590 if (h
== NULL
|| h
->type
!= bfd_link_hash_defined
)
1593 return h
->u
.def
.value
+ sec_addr (h
->u
.def
.section
);
1596 /* Emplace a static relocation. */
1598 static bfd_reloc_status_type
1599 perform_relocation (const reloc_howto_type
*howto
,
1600 const Elf_Internal_Rela
*rel
,
1602 asection
*input_section
,
1606 if (howto
->pc_relative
)
1607 value
-= sec_addr (input_section
) + rel
->r_offset
;
1608 value
+= rel
->r_addend
;
1610 switch (ELFNN_R_TYPE (rel
->r_info
))
1613 case R_RISCV_TPREL_HI20
:
1614 case R_RISCV_PCREL_HI20
:
1615 case R_RISCV_GOT_HI20
:
1616 case R_RISCV_TLS_GOT_HI20
:
1617 case R_RISCV_TLS_GD_HI20
:
1618 if (ARCH_SIZE
> 32 && !VALID_UTYPE_IMM (RISCV_CONST_HIGH_PART (value
)))
1619 return bfd_reloc_overflow
;
1620 value
= ENCODE_UTYPE_IMM (RISCV_CONST_HIGH_PART (value
));
1623 case R_RISCV_LO12_I
:
1624 case R_RISCV_GPREL_I
:
1625 case R_RISCV_TPREL_LO12_I
:
1626 case R_RISCV_TPREL_I
:
1627 case R_RISCV_PCREL_LO12_I
:
1628 value
= ENCODE_ITYPE_IMM (value
);
1631 case R_RISCV_LO12_S
:
1632 case R_RISCV_GPREL_S
:
1633 case R_RISCV_TPREL_LO12_S
:
1634 case R_RISCV_TPREL_S
:
1635 case R_RISCV_PCREL_LO12_S
:
1636 value
= ENCODE_STYPE_IMM (value
);
1640 case R_RISCV_CALL_PLT
:
1641 if (ARCH_SIZE
> 32 && !VALID_UTYPE_IMM (RISCV_CONST_HIGH_PART (value
)))
1642 return bfd_reloc_overflow
;
1643 value
= ENCODE_UTYPE_IMM (RISCV_CONST_HIGH_PART (value
))
1644 | (ENCODE_ITYPE_IMM (value
) << 32);
1648 if (!VALID_UJTYPE_IMM (value
))
1649 return bfd_reloc_overflow
;
1650 value
= ENCODE_UJTYPE_IMM (value
);
1653 case R_RISCV_BRANCH
:
1654 if (!VALID_SBTYPE_IMM (value
))
1655 return bfd_reloc_overflow
;
1656 value
= ENCODE_SBTYPE_IMM (value
);
1659 case R_RISCV_RVC_BRANCH
:
1660 if (!VALID_RVC_B_IMM (value
))
1661 return bfd_reloc_overflow
;
1662 value
= ENCODE_RVC_B_IMM (value
);
1665 case R_RISCV_RVC_JUMP
:
1666 if (!VALID_RVC_J_IMM (value
))
1667 return bfd_reloc_overflow
;
1668 value
= ENCODE_RVC_J_IMM (value
);
1671 case R_RISCV_RVC_LUI
:
1672 if (RISCV_CONST_HIGH_PART (value
) == 0)
1674 /* Linker relaxation can convert an address equal to or greater than
1675 0x800 to slightly below 0x800. C.LUI does not accept zero as a
1676 valid immediate. We can fix this by converting it to a C.LI. */
1677 bfd_vma insn
= riscv_get_insn (howto
->bitsize
,
1678 contents
+ rel
->r_offset
);
1679 insn
= (insn
& ~MATCH_C_LUI
) | MATCH_C_LI
;
1680 riscv_put_insn (howto
->bitsize
, insn
, contents
+ rel
->r_offset
);
1681 value
= ENCODE_RVC_IMM (0);
1683 else if (!VALID_RVC_LUI_IMM (RISCV_CONST_HIGH_PART (value
)))
1684 return bfd_reloc_overflow
;
1686 value
= ENCODE_RVC_LUI_IMM (RISCV_CONST_HIGH_PART (value
));
1704 case R_RISCV_32_PCREL
:
1705 case R_RISCV_TLS_DTPREL32
:
1706 case R_RISCV_TLS_DTPREL64
:
1709 case R_RISCV_DELETE
:
1710 return bfd_reloc_ok
;
1713 return bfd_reloc_notsupported
;
1717 if (riscv_is_insn_reloc (howto
))
1718 word
= riscv_get_insn (howto
->bitsize
, contents
+ rel
->r_offset
);
1720 word
= bfd_get (howto
->bitsize
, input_bfd
, contents
+ rel
->r_offset
);
1721 word
= (word
& ~howto
->dst_mask
) | (value
& howto
->dst_mask
);
1722 if (riscv_is_insn_reloc (howto
))
1723 riscv_put_insn (howto
->bitsize
, word
, contents
+ rel
->r_offset
);
1725 bfd_put (howto
->bitsize
, input_bfd
, word
, contents
+ rel
->r_offset
);
1727 return bfd_reloc_ok
;
1730 /* Remember all PC-relative high-part relocs we've encountered to help us
1731 later resolve the corresponding low-part relocs. */
1737 } riscv_pcrel_hi_reloc
;
1739 typedef struct riscv_pcrel_lo_reloc
1741 asection
* input_section
;
1742 struct bfd_link_info
* info
;
1743 reloc_howto_type
* howto
;
1744 const Elf_Internal_Rela
* reloc
;
1747 bfd_byte
* contents
;
1748 struct riscv_pcrel_lo_reloc
* next
;
1749 } riscv_pcrel_lo_reloc
;
1754 riscv_pcrel_lo_reloc
*lo_relocs
;
1755 } riscv_pcrel_relocs
;
1758 riscv_pcrel_reloc_hash (const void *entry
)
1760 const riscv_pcrel_hi_reloc
*e
= entry
;
1761 return (hashval_t
)(e
->address
>> 2);
1765 riscv_pcrel_reloc_eq (const void *entry1
, const void *entry2
)
1767 const riscv_pcrel_hi_reloc
*e1
= entry1
, *e2
= entry2
;
1768 return e1
->address
== e2
->address
;
1772 riscv_init_pcrel_relocs (riscv_pcrel_relocs
*p
)
1775 p
->lo_relocs
= NULL
;
1776 p
->hi_relocs
= htab_create (1024, riscv_pcrel_reloc_hash
,
1777 riscv_pcrel_reloc_eq
, free
);
1778 return p
->hi_relocs
!= NULL
;
1782 riscv_free_pcrel_relocs (riscv_pcrel_relocs
*p
)
1784 riscv_pcrel_lo_reloc
*cur
= p
->lo_relocs
;
1788 riscv_pcrel_lo_reloc
*next
= cur
->next
;
1793 htab_delete (p
->hi_relocs
);
1797 riscv_zero_pcrel_hi_reloc (Elf_Internal_Rela
*rel
,
1798 struct bfd_link_info
*info
,
1802 const reloc_howto_type
*howto
,
1803 bfd
*input_bfd ATTRIBUTE_UNUSED
)
1805 /* We may need to reference low addreses in PC-relative modes even when the
1806 PC is far away from these addresses. For example, undefweak references
1807 need to produce the address 0 when linked. As 0 is far from the arbitrary
1808 addresses that we can link PC-relative programs at, the linker can't
1809 actually relocate references to those symbols. In order to allow these
1810 programs to work we simply convert the PC-relative auipc sequences to
1811 0-relative lui sequences. */
1812 if (bfd_link_pic (info
))
1815 /* If it's possible to reference the symbol using auipc we do so, as that's
1816 more in the spirit of the PC-relative relocations we're processing. */
1817 bfd_vma offset
= addr
- pc
;
1818 if (ARCH_SIZE
== 32 || VALID_UTYPE_IMM (RISCV_CONST_HIGH_PART (offset
)))
1821 /* If it's impossible to reference this with a LUI-based offset then don't
1822 bother to convert it at all so users still see the PC-relative relocation
1823 in the truncation message. */
1824 if (ARCH_SIZE
> 32 && !VALID_UTYPE_IMM (RISCV_CONST_HIGH_PART (addr
)))
1827 rel
->r_info
= ELFNN_R_INFO(addr
, R_RISCV_HI20
);
1829 bfd_vma insn
= riscv_get_insn(howto
->bitsize
, contents
+ rel
->r_offset
);
1830 insn
= (insn
& ~MASK_AUIPC
) | MATCH_LUI
;
1831 riscv_put_insn(howto
->bitsize
, insn
, contents
+ rel
->r_offset
);
1836 riscv_record_pcrel_hi_reloc (riscv_pcrel_relocs
*p
, bfd_vma addr
,
1837 bfd_vma value
, bfd_boolean absolute
)
1839 bfd_vma offset
= absolute
? value
: value
- addr
;
1840 riscv_pcrel_hi_reloc entry
= {addr
, offset
};
1841 riscv_pcrel_hi_reloc
**slot
=
1842 (riscv_pcrel_hi_reloc
**) htab_find_slot (p
->hi_relocs
, &entry
, INSERT
);
1844 BFD_ASSERT (*slot
== NULL
);
1845 *slot
= (riscv_pcrel_hi_reloc
*) bfd_malloc (sizeof (riscv_pcrel_hi_reloc
));
1853 riscv_record_pcrel_lo_reloc (riscv_pcrel_relocs
*p
,
1854 asection
*input_section
,
1855 struct bfd_link_info
*info
,
1856 reloc_howto_type
*howto
,
1857 const Elf_Internal_Rela
*reloc
,
1862 riscv_pcrel_lo_reloc
*entry
;
1863 entry
= (riscv_pcrel_lo_reloc
*) bfd_malloc (sizeof (riscv_pcrel_lo_reloc
));
1866 *entry
= (riscv_pcrel_lo_reloc
) {input_section
, info
, howto
, reloc
, addr
,
1867 name
, contents
, p
->lo_relocs
};
1868 p
->lo_relocs
= entry
;
1873 riscv_resolve_pcrel_lo_relocs (riscv_pcrel_relocs
*p
)
1875 riscv_pcrel_lo_reloc
*r
;
1877 for (r
= p
->lo_relocs
; r
!= NULL
; r
= r
->next
)
1879 bfd
*input_bfd
= r
->input_section
->owner
;
1881 riscv_pcrel_hi_reloc search
= {r
->addr
, 0};
1882 riscv_pcrel_hi_reloc
*entry
= htab_find (p
->hi_relocs
, &search
);
1884 /* Check for overflow into bit 11 when adding reloc addend. */
1885 || (! (entry
->value
& 0x800)
1886 && ((entry
->value
+ r
->reloc
->r_addend
) & 0x800)))
1888 char *string
= (entry
== NULL
1889 ? "%pcrel_lo missing matching %pcrel_hi"
1890 : "%pcrel_lo overflow with an addend");
1891 (*r
->info
->callbacks
->reloc_dangerous
)
1892 (r
->info
, string
, input_bfd
, r
->input_section
, r
->reloc
->r_offset
);
1896 perform_relocation (r
->howto
, r
->reloc
, entry
->value
, r
->input_section
,
1897 input_bfd
, r
->contents
);
1903 /* Relocate a RISC-V ELF section.
1905 The RELOCATE_SECTION function is called by the new ELF backend linker
1906 to handle the relocations for a section.
1908 The relocs are always passed as Rela structures.
1910 This function is responsible for adjusting the section contents as
1911 necessary, and (if generating a relocatable output file) adjusting
1912 the reloc addend as necessary.
1914 This function does not have to worry about setting the reloc
1915 address or the reloc symbol index.
1917 LOCAL_SYMS is a pointer to the swapped in local symbols.
1919 LOCAL_SECTIONS is an array giving the section in the input file
1920 corresponding to the st_shndx field of each local symbol.
1922 The global hash table entry for the global symbols can be found
1923 via elf_sym_hashes (input_bfd).
1925 When generating relocatable output, this function must handle
1926 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1927 going to be the section symbol corresponding to the output
1928 section, which means that the addend must be adjusted
1932 riscv_elf_relocate_section (bfd
*output_bfd
,
1933 struct bfd_link_info
*info
,
1935 asection
*input_section
,
1937 Elf_Internal_Rela
*relocs
,
1938 Elf_Internal_Sym
*local_syms
,
1939 asection
**local_sections
)
1941 Elf_Internal_Rela
*rel
;
1942 Elf_Internal_Rela
*relend
;
1943 riscv_pcrel_relocs pcrel_relocs
;
1944 bfd_boolean ret
= FALSE
;
1945 struct riscv_elf_link_hash_table
*htab
= riscv_elf_hash_table (info
);
1946 Elf_Internal_Shdr
*symtab_hdr
= &elf_symtab_hdr (input_bfd
);
1947 struct elf_link_hash_entry
**sym_hashes
= elf_sym_hashes (input_bfd
);
1948 bfd_vma
*local_got_offsets
= elf_local_got_offsets (input_bfd
);
1949 bfd_boolean absolute
;
1951 if (!riscv_init_pcrel_relocs (&pcrel_relocs
))
1954 relend
= relocs
+ input_section
->reloc_count
;
1955 for (rel
= relocs
; rel
< relend
; rel
++)
1957 unsigned long r_symndx
;
1958 struct elf_link_hash_entry
*h
;
1959 Elf_Internal_Sym
*sym
;
1962 bfd_reloc_status_type r
= bfd_reloc_ok
;
1963 const char *name
= NULL
;
1964 bfd_vma off
, ie_off
;
1965 bfd_boolean unresolved_reloc
, is_ie
= FALSE
;
1966 bfd_vma pc
= sec_addr (input_section
) + rel
->r_offset
;
1967 int r_type
= ELFNN_R_TYPE (rel
->r_info
), tls_type
;
1968 reloc_howto_type
*howto
= riscv_elf_rtype_to_howto (input_bfd
, r_type
);
1969 const char *msg
= NULL
;
1970 char *msg_buf
= NULL
;
1971 bfd_boolean resolved_to_zero
;
1974 || r_type
== R_RISCV_GNU_VTINHERIT
|| r_type
== R_RISCV_GNU_VTENTRY
)
1977 /* This is a final link. */
1978 r_symndx
= ELFNN_R_SYM (rel
->r_info
);
1982 unresolved_reloc
= FALSE
;
1983 if (r_symndx
< symtab_hdr
->sh_info
)
1985 sym
= local_syms
+ r_symndx
;
1986 sec
= local_sections
[r_symndx
];
1987 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
1989 /* Relocate against local STT_GNU_IFUNC symbol. */
1990 if (!bfd_link_relocatable (info
)
1991 && ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
1993 h
= riscv_elf_get_local_sym_hash (htab
, input_bfd
, rel
, FALSE
);
1997 /* Set STT_GNU_IFUNC symbol value. */
1998 h
->root
.u
.def
.value
= sym
->st_value
;
1999 h
->root
.u
.def
.section
= sec
;
2004 bfd_boolean warned
, ignored
;
2006 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2007 r_symndx
, symtab_hdr
, sym_hashes
,
2009 unresolved_reloc
, warned
, ignored
);
2012 /* To avoid generating warning messages about truncated
2013 relocations, set the relocation's address to be the same as
2014 the start of this section. */
2015 if (input_section
->output_section
!= NULL
)
2016 relocation
= input_section
->output_section
->vma
;
2022 if (sec
!= NULL
&& discarded_section (sec
))
2023 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
2024 rel
, 1, relend
, howto
, 0, contents
);
2026 if (bfd_link_relocatable (info
))
2029 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
2030 it here if it is defined in a non-shared object. */
2032 && h
->type
== STT_GNU_IFUNC
2035 asection
*plt
, *base_got
;
2037 if ((input_section
->flags
& SEC_ALLOC
) == 0)
2039 /* If this is a SHT_NOTE section without SHF_ALLOC, treat
2040 STT_GNU_IFUNC symbol as STT_FUNC. */
2041 if (elf_section_type (input_section
) == SHT_NOTE
)
2044 /* Dynamic relocs are not propagated for SEC_DEBUGGING
2045 sections because such sections are not SEC_ALLOC and
2046 thus ld.so will not process them. */
2047 if ((input_section
->flags
& SEC_DEBUGGING
) != 0)
2052 else if (h
->plt
.offset
== (bfd_vma
) -1
2053 /* The following relocation may not need the .plt entries
2054 when all references to a STT_GNU_IFUNC symbols are done
2055 via GOT or static function pointers. */
2056 && r_type
!= R_RISCV_32
2057 && r_type
!= R_RISCV_64
2058 && r_type
!= R_RISCV_HI20
2059 && r_type
!= R_RISCV_GOT_HI20
2060 && r_type
!= R_RISCV_LO12_I
2061 && r_type
!= R_RISCV_LO12_S
)
2062 goto bad_ifunc_reloc
;
2064 /* STT_GNU_IFUNC symbol must go through PLT. */
2065 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
2066 relocation
= plt
->output_section
->vma
2067 + plt
->output_offset
2074 if (rel
->r_addend
!= 0)
2076 if (h
->root
.root
.string
)
2077 name
= h
->root
.root
.string
;
2079 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
, NULL
);
2082 /* xgettext:c-format */
2083 (_("%pB: relocation %s against STT_GNU_IFUNC "
2084 "symbol `%s' has non-zero addend: %" PRId64
),
2085 input_bfd
, howto
->name
, name
, (int64_t) rel
->r_addend
);
2086 bfd_set_error (bfd_error_bad_value
);
2090 /* Generate dynamic relocation only when there is a non-GOT
2091 reference in a shared object or there is no PLT. */
2092 if ((bfd_link_pic (info
) && h
->non_got_ref
)
2093 || h
->plt
.offset
== (bfd_vma
) -1)
2095 Elf_Internal_Rela outrel
;
2098 /* Need a dynamic relocation to get the real function
2100 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
2104 if (outrel
.r_offset
== (bfd_vma
) -1
2105 || outrel
.r_offset
== (bfd_vma
) -2)
2108 outrel
.r_offset
+= input_section
->output_section
->vma
2109 + input_section
->output_offset
;
2111 if (h
->dynindx
== -1
2113 || bfd_link_executable (info
))
2115 info
->callbacks
->minfo
2116 (_("Local IFUNC function `%s' in %pB\n"),
2117 h
->root
.root
.string
,
2118 h
->root
.u
.def
.section
->owner
);
2120 /* This symbol is resolved locally. */
2121 outrel
.r_info
= ELFNN_R_INFO (0, R_RISCV_IRELATIVE
);
2122 outrel
.r_addend
= h
->root
.u
.def
.value
2123 + h
->root
.u
.def
.section
->output_section
->vma
2124 + h
->root
.u
.def
.section
->output_offset
;
2128 outrel
.r_info
= ELFNN_R_INFO (h
->dynindx
, r_type
);
2129 outrel
.r_addend
= 0;
2132 /* Dynamic relocations are stored in
2133 1. .rela.ifunc section in PIC object.
2134 2. .rela.got section in dynamic executable.
2135 3. .rela.iplt section in static executable. */
2136 if (bfd_link_pic (info
))
2137 sreloc
= htab
->elf
.irelifunc
;
2138 else if (htab
->elf
.splt
!= NULL
)
2139 sreloc
= htab
->elf
.srelgot
;
2141 sreloc
= htab
->elf
.irelplt
;
2143 riscv_elf_append_rela (output_bfd
, sreloc
, &outrel
);
2145 /* If this reloc is against an external symbol, we
2146 do not want to fiddle with the addend. Otherwise,
2147 we need to include the symbol value so that it
2148 becomes an addend for the dynamic reloc. For an
2149 internal symbol, we have updated addend. */
2154 case R_RISCV_GOT_HI20
:
2155 base_got
= htab
->elf
.sgot
;
2156 off
= h
->got
.offset
;
2158 if (base_got
== NULL
)
2161 if (off
== (bfd_vma
) -1)
2165 /* We can't use h->got.offset here to save state, or
2166 even just remember the offset, as finish_dynamic_symbol
2167 would use that as offset into .got. */
2169 if (htab
->elf
.splt
!= NULL
)
2171 plt_idx
= (h
->plt
.offset
- PLT_HEADER_SIZE
)
2173 off
= GOTPLT_HEADER_SIZE
+ (plt_idx
* GOT_ENTRY_SIZE
);
2174 base_got
= htab
->elf
.sgotplt
;
2178 plt_idx
= h
->plt
.offset
/ PLT_ENTRY_SIZE
;
2179 off
= plt_idx
* GOT_ENTRY_SIZE
;
2180 base_got
= htab
->elf
.igotplt
;
2183 if (h
->dynindx
== -1
2187 /* This references the local definition. We must
2188 initialize this entry in the global offset table.
2189 Since the offset must always be a multiple of 8,
2190 we use the least significant bit to record
2191 whether we have initialized it already.
2193 When doing a dynamic link, we create a .rela.got
2194 relocation entry to initialize the value. This
2195 is done in the finish_dynamic_symbol routine. */
2200 bfd_put_NN (output_bfd
, relocation
,
2201 base_got
->contents
+ off
);
2202 /* Note that this is harmless for the case,
2203 as -1 | 1 still is -1. */
2209 relocation
= base_got
->output_section
->vma
2210 + base_got
->output_offset
+ off
;
2212 r_type
= ELFNN_R_TYPE (rel
->r_info
);
2213 howto
= riscv_elf_rtype_to_howto (input_bfd
, r_type
);
2215 r
= bfd_reloc_notsupported
;
2216 else if (!riscv_record_pcrel_hi_reloc (&pcrel_relocs
, pc
,
2218 r
= bfd_reloc_overflow
;
2222 case R_RISCV_CALL_PLT
:
2224 case R_RISCV_LO12_I
:
2225 case R_RISCV_LO12_S
:
2228 case R_RISCV_PCREL_HI20
:
2229 r_type
= ELFNN_R_TYPE (rel
->r_info
);
2230 howto
= riscv_elf_rtype_to_howto (input_bfd
, r_type
);
2232 r
= bfd_reloc_notsupported
;
2233 else if (!riscv_record_pcrel_hi_reloc (&pcrel_relocs
, pc
,
2235 r
= bfd_reloc_overflow
;
2240 if (h
->root
.root
.string
)
2241 name
= h
->root
.root
.string
;
2243 /* The entry of local ifunc is fake in global hash table,
2244 we should find the name by the original local symbol. */
2245 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
, NULL
);
2248 /* xgettext:c-format */
2249 (_("%pB: relocation %s against STT_GNU_IFUNC "
2250 "symbol `%s' isn't supported"), input_bfd
,
2252 bfd_set_error (bfd_error_bad_value
);
2259 name
= h
->root
.root
.string
;
2262 name
= (bfd_elf_string_from_elf_section
2263 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
2264 if (name
== NULL
|| *name
== '\0')
2265 name
= bfd_section_name (sec
);
2268 resolved_to_zero
= (h
!= NULL
2269 && UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
));
2275 case R_RISCV_TPREL_ADD
:
2277 case R_RISCV_JUMP_SLOT
:
2278 case R_RISCV_RELATIVE
:
2279 /* These require nothing of us at all. */
2283 case R_RISCV_BRANCH
:
2284 case R_RISCV_RVC_BRANCH
:
2285 case R_RISCV_RVC_LUI
:
2286 case R_RISCV_LO12_I
:
2287 case R_RISCV_LO12_S
:
2292 case R_RISCV_32_PCREL
:
2293 case R_RISCV_DELETE
:
2294 /* These require no special handling beyond perform_relocation. */
2297 case R_RISCV_GOT_HI20
:
2300 bfd_boolean dyn
, pic
;
2302 off
= h
->got
.offset
;
2303 BFD_ASSERT (off
!= (bfd_vma
) -1);
2304 dyn
= elf_hash_table (info
)->dynamic_sections_created
;
2305 pic
= bfd_link_pic (info
);
2307 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, pic
, h
)
2308 || (pic
&& SYMBOL_REFERENCES_LOCAL (info
, h
)))
2310 /* This is actually a static link, or it is a
2311 -Bsymbolic link and the symbol is defined
2312 locally, or the symbol was forced to be local
2313 because of a version file. We must initialize
2314 this entry in the global offset table. Since the
2315 offset must always be a multiple of the word size,
2316 we use the least significant bit to record whether
2317 we have initialized it already.
2319 When doing a dynamic link, we create a .rela.got
2320 relocation entry to initialize the value. This
2321 is done in the finish_dynamic_symbol routine. */
2326 bfd_put_NN (output_bfd
, relocation
,
2327 htab
->elf
.sgot
->contents
+ off
);
2332 unresolved_reloc
= FALSE
;
2336 BFD_ASSERT (local_got_offsets
!= NULL
2337 && local_got_offsets
[r_symndx
] != (bfd_vma
) -1);
2339 off
= local_got_offsets
[r_symndx
];
2341 /* The offset must always be a multiple of the word size.
2342 So, we can use the least significant bit to record
2343 whether we have already processed this entry. */
2348 if (bfd_link_pic (info
))
2351 Elf_Internal_Rela outrel
;
2353 /* We need to generate a R_RISCV_RELATIVE reloc
2354 for the dynamic linker. */
2355 s
= htab
->elf
.srelgot
;
2356 BFD_ASSERT (s
!= NULL
);
2358 outrel
.r_offset
= sec_addr (htab
->elf
.sgot
) + off
;
2360 ELFNN_R_INFO (0, R_RISCV_RELATIVE
);
2361 outrel
.r_addend
= relocation
;
2363 riscv_elf_append_rela (output_bfd
, s
, &outrel
);
2366 bfd_put_NN (output_bfd
, relocation
,
2367 htab
->elf
.sgot
->contents
+ off
);
2368 local_got_offsets
[r_symndx
] |= 1;
2371 relocation
= sec_addr (htab
->elf
.sgot
) + off
;
2372 absolute
= riscv_zero_pcrel_hi_reloc (rel
,
2379 r_type
= ELFNN_R_TYPE (rel
->r_info
);
2380 howto
= riscv_elf_rtype_to_howto (input_bfd
, r_type
);
2382 r
= bfd_reloc_notsupported
;
2383 else if (!riscv_record_pcrel_hi_reloc (&pcrel_relocs
, pc
,
2384 relocation
, absolute
))
2385 r
= bfd_reloc_overflow
;
2393 bfd_vma old_value
= bfd_get (howto
->bitsize
, input_bfd
,
2394 contents
+ rel
->r_offset
);
2395 relocation
= old_value
+ relocation
;
2405 bfd_vma old_value
= bfd_get (howto
->bitsize
, input_bfd
,
2406 contents
+ rel
->r_offset
);
2407 relocation
= old_value
- relocation
;
2412 case R_RISCV_CALL_PLT
:
2413 /* Handle a call to an undefined weak function. This won't be
2414 relaxed, so we have to handle it here. */
2415 if (h
!= NULL
&& h
->root
.type
== bfd_link_hash_undefweak
2416 && (!bfd_link_pic (info
) || h
->plt
.offset
== MINUS_ONE
))
2418 /* We can use x0 as the base register. */
2419 bfd_vma insn
= bfd_getl32 (contents
+ rel
->r_offset
+ 4);
2420 insn
&= ~(OP_MASK_RS1
<< OP_SH_RS1
);
2421 bfd_putl32 (insn
, contents
+ rel
->r_offset
+ 4);
2422 /* Set the relocation value so that we get 0 after the pc
2423 relative adjustment. */
2424 relocation
= sec_addr (input_section
) + rel
->r_offset
;
2429 case R_RISCV_RVC_JUMP
:
2430 /* This line has to match the check in _bfd_riscv_relax_section. */
2431 if (bfd_link_pic (info
) && h
!= NULL
&& h
->plt
.offset
!= MINUS_ONE
)
2433 /* Refer to the PLT entry. */
2434 relocation
= sec_addr (htab
->elf
.splt
) + h
->plt
.offset
;
2435 unresolved_reloc
= FALSE
;
2439 case R_RISCV_TPREL_HI20
:
2440 relocation
= tpoff (info
, relocation
);
2443 case R_RISCV_TPREL_LO12_I
:
2444 case R_RISCV_TPREL_LO12_S
:
2445 relocation
= tpoff (info
, relocation
);
2448 case R_RISCV_TPREL_I
:
2449 case R_RISCV_TPREL_S
:
2450 relocation
= tpoff (info
, relocation
);
2451 if (VALID_ITYPE_IMM (relocation
+ rel
->r_addend
))
2453 /* We can use tp as the base register. */
2454 bfd_vma insn
= bfd_getl32 (contents
+ rel
->r_offset
);
2455 insn
&= ~(OP_MASK_RS1
<< OP_SH_RS1
);
2456 insn
|= X_TP
<< OP_SH_RS1
;
2457 bfd_putl32 (insn
, contents
+ rel
->r_offset
);
2460 r
= bfd_reloc_overflow
;
2463 case R_RISCV_GPREL_I
:
2464 case R_RISCV_GPREL_S
:
2466 bfd_vma gp
= riscv_global_pointer_value (info
);
2467 bfd_boolean x0_base
= VALID_ITYPE_IMM (relocation
+ rel
->r_addend
);
2468 if (x0_base
|| VALID_ITYPE_IMM (relocation
+ rel
->r_addend
- gp
))
2470 /* We can use x0 or gp as the base register. */
2471 bfd_vma insn
= bfd_getl32 (contents
+ rel
->r_offset
);
2472 insn
&= ~(OP_MASK_RS1
<< OP_SH_RS1
);
2475 rel
->r_addend
-= gp
;
2476 insn
|= X_GP
<< OP_SH_RS1
;
2478 bfd_putl32 (insn
, contents
+ rel
->r_offset
);
2481 r
= bfd_reloc_overflow
;
2485 case R_RISCV_PCREL_HI20
:
2486 absolute
= riscv_zero_pcrel_hi_reloc (rel
,
2493 r_type
= ELFNN_R_TYPE (rel
->r_info
);
2494 howto
= riscv_elf_rtype_to_howto (input_bfd
, r_type
);
2496 r
= bfd_reloc_notsupported
;
2497 else if (!riscv_record_pcrel_hi_reloc (&pcrel_relocs
, pc
,
2498 relocation
+ rel
->r_addend
,
2500 r
= bfd_reloc_overflow
;
2503 case R_RISCV_PCREL_LO12_I
:
2504 case R_RISCV_PCREL_LO12_S
:
2505 /* We don't allow section symbols plus addends as the auipc address,
2506 because then riscv_relax_delete_bytes would have to search through
2507 all relocs to update these addends. This is also ambiguous, as
2508 we do allow offsets to be added to the target address, which are
2509 not to be used to find the auipc address. */
2510 if (((sym
!= NULL
&& (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
))
2511 || (h
!= NULL
&& h
->type
== STT_SECTION
))
2514 msg
= _("%pcrel_lo section symbol with an addend");
2515 r
= bfd_reloc_dangerous
;
2519 if (riscv_record_pcrel_lo_reloc (&pcrel_relocs
, input_section
, info
,
2520 howto
, rel
, relocation
, name
,
2523 r
= bfd_reloc_overflow
;
2526 case R_RISCV_TLS_DTPREL32
:
2527 case R_RISCV_TLS_DTPREL64
:
2528 relocation
= dtpoff (info
, relocation
);
2533 if ((input_section
->flags
& SEC_ALLOC
) == 0)
2536 if ((bfd_link_pic (info
)
2538 || (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2539 && !resolved_to_zero
)
2540 || h
->root
.type
!= bfd_link_hash_undefweak
)
2541 && (! howto
->pc_relative
2542 || !SYMBOL_CALLS_LOCAL (info
, h
)))
2543 || (!bfd_link_pic (info
)
2549 || h
->root
.type
== bfd_link_hash_undefweak
2550 || h
->root
.type
== bfd_link_hash_undefined
)))
2552 Elf_Internal_Rela outrel
;
2554 bfd_boolean skip_static_relocation
, skip_dynamic_relocation
;
2556 /* When generating a shared object, these relocations
2557 are copied into the output file to be resolved at run
2561 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
2563 skip_static_relocation
= outrel
.r_offset
!= (bfd_vma
) -2;
2564 skip_dynamic_relocation
= outrel
.r_offset
>= (bfd_vma
) -2;
2565 outrel
.r_offset
+= sec_addr (input_section
);
2567 if (skip_dynamic_relocation
)
2568 memset (&outrel
, 0, sizeof outrel
);
2569 else if (h
!= NULL
&& h
->dynindx
!= -1
2570 && !(bfd_link_pic (info
)
2571 && SYMBOLIC_BIND (info
, h
)
2574 outrel
.r_info
= ELFNN_R_INFO (h
->dynindx
, r_type
);
2575 outrel
.r_addend
= rel
->r_addend
;
2579 outrel
.r_info
= ELFNN_R_INFO (0, R_RISCV_RELATIVE
);
2580 outrel
.r_addend
= relocation
+ rel
->r_addend
;
2583 sreloc
= elf_section_data (input_section
)->sreloc
;
2584 riscv_elf_append_rela (output_bfd
, sreloc
, &outrel
);
2585 if (skip_static_relocation
)
2590 case R_RISCV_TLS_GOT_HI20
:
2594 case R_RISCV_TLS_GD_HI20
:
2597 off
= h
->got
.offset
;
2602 off
= local_got_offsets
[r_symndx
];
2603 local_got_offsets
[r_symndx
] |= 1;
2606 tls_type
= _bfd_riscv_elf_tls_type (input_bfd
, h
, r_symndx
);
2607 BFD_ASSERT (tls_type
& (GOT_TLS_IE
| GOT_TLS_GD
));
2608 /* If this symbol is referenced by both GD and IE TLS, the IE
2609 reference's GOT slot follows the GD reference's slots. */
2611 if ((tls_type
& GOT_TLS_GD
) && (tls_type
& GOT_TLS_IE
))
2612 ie_off
= 2 * GOT_ENTRY_SIZE
;
2618 Elf_Internal_Rela outrel
;
2620 bfd_boolean need_relocs
= FALSE
;
2622 if (htab
->elf
.srelgot
== NULL
)
2627 bfd_boolean dyn
, pic
;
2628 dyn
= htab
->elf
.dynamic_sections_created
;
2629 pic
= bfd_link_pic (info
);
2631 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, pic
, h
)
2632 && (!pic
|| !SYMBOL_REFERENCES_LOCAL (info
, h
)))
2636 /* The GOT entries have not been initialized yet. Do it
2637 now, and emit any relocations. */
2638 if ((bfd_link_pic (info
) || indx
!= 0)
2640 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2641 || h
->root
.type
!= bfd_link_hash_undefweak
))
2644 if (tls_type
& GOT_TLS_GD
)
2648 outrel
.r_offset
= sec_addr (htab
->elf
.sgot
) + off
;
2649 outrel
.r_addend
= 0;
2650 outrel
.r_info
= ELFNN_R_INFO (indx
, R_RISCV_TLS_DTPMODNN
);
2651 bfd_put_NN (output_bfd
, 0,
2652 htab
->elf
.sgot
->contents
+ off
);
2653 riscv_elf_append_rela (output_bfd
, htab
->elf
.srelgot
, &outrel
);
2656 BFD_ASSERT (! unresolved_reloc
);
2657 bfd_put_NN (output_bfd
,
2658 dtpoff (info
, relocation
),
2659 (htab
->elf
.sgot
->contents
+ off
+
2660 RISCV_ELF_WORD_BYTES
));
2664 bfd_put_NN (output_bfd
, 0,
2665 (htab
->elf
.sgot
->contents
+ off
+
2666 RISCV_ELF_WORD_BYTES
));
2667 outrel
.r_info
= ELFNN_R_INFO (indx
, R_RISCV_TLS_DTPRELNN
);
2668 outrel
.r_offset
+= RISCV_ELF_WORD_BYTES
;
2669 riscv_elf_append_rela (output_bfd
, htab
->elf
.srelgot
, &outrel
);
2674 /* If we are not emitting relocations for a
2675 general dynamic reference, then we must be in a
2676 static link or an executable link with the
2677 symbol binding locally. Mark it as belonging
2678 to module 1, the executable. */
2679 bfd_put_NN (output_bfd
, 1,
2680 htab
->elf
.sgot
->contents
+ off
);
2681 bfd_put_NN (output_bfd
,
2682 dtpoff (info
, relocation
),
2683 (htab
->elf
.sgot
->contents
+ off
+
2684 RISCV_ELF_WORD_BYTES
));
2688 if (tls_type
& GOT_TLS_IE
)
2692 bfd_put_NN (output_bfd
, 0,
2693 htab
->elf
.sgot
->contents
+ off
+ ie_off
);
2694 outrel
.r_offset
= sec_addr (htab
->elf
.sgot
)
2696 outrel
.r_addend
= 0;
2698 outrel
.r_addend
= tpoff (info
, relocation
);
2699 outrel
.r_info
= ELFNN_R_INFO (indx
, R_RISCV_TLS_TPRELNN
);
2700 riscv_elf_append_rela (output_bfd
, htab
->elf
.srelgot
, &outrel
);
2704 bfd_put_NN (output_bfd
, tpoff (info
, relocation
),
2705 htab
->elf
.sgot
->contents
+ off
+ ie_off
);
2710 BFD_ASSERT (off
< (bfd_vma
) -2);
2711 relocation
= sec_addr (htab
->elf
.sgot
) + off
+ (is_ie
? ie_off
: 0);
2712 if (!riscv_record_pcrel_hi_reloc (&pcrel_relocs
, pc
,
2714 r
= bfd_reloc_overflow
;
2715 unresolved_reloc
= FALSE
;
2719 r
= bfd_reloc_notsupported
;
2722 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
2723 because such sections are not SEC_ALLOC and thus ld.so will
2724 not process them. */
2725 if (unresolved_reloc
2726 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
2728 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
2729 rel
->r_offset
) != (bfd_vma
) -1)
2734 case R_RISCV_RVC_JUMP
:
2735 if (asprintf (&msg_buf
,
2736 _("%%X%%P: relocation %s against `%s' can "
2737 "not be used when making a shared object; "
2738 "recompile with -fPIC\n"),
2740 h
->root
.root
.string
) == -1)
2745 if (asprintf (&msg_buf
,
2746 _("%%X%%P: unresolvable %s relocation against "
2749 h
->root
.root
.string
) == -1)
2755 r
= bfd_reloc_notsupported
;
2759 if (r
== bfd_reloc_ok
)
2760 r
= perform_relocation (howto
, rel
, relocation
, input_section
,
2761 input_bfd
, contents
);
2763 /* We should have already detected the error and set message before.
2764 If the error message isn't set since the linker runs out of memory
2765 or we don't set it before, then we should set the default message
2766 with the "internal error" string here. */
2772 case bfd_reloc_overflow
:
2773 info
->callbacks
->reloc_overflow
2774 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
2775 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
2778 case bfd_reloc_undefined
:
2779 info
->callbacks
->undefined_symbol
2780 (info
, name
, input_bfd
, input_section
, rel
->r_offset
,
2784 case bfd_reloc_outofrange
:
2786 msg
= _("%X%P: internal error: out of range error\n");
2789 case bfd_reloc_notsupported
:
2791 msg
= _("%X%P: internal error: unsupported relocation error\n");
2794 case bfd_reloc_dangerous
:
2795 /* The error message should already be set. */
2797 msg
= _("dangerous relocation error");
2798 info
->callbacks
->reloc_dangerous
2799 (info
, msg
, input_bfd
, input_section
, rel
->r_offset
);
2803 msg
= _("%X%P: internal error: unknown error\n");
2807 /* Do not report error message for the dangerous relocation again. */
2808 if (msg
&& r
!= bfd_reloc_dangerous
)
2809 info
->callbacks
->einfo (msg
);
2811 /* Free the unused `msg_buf`. */
2814 /* We already reported the error via a callback, so don't try to report
2815 it again by returning false. That leads to spurious errors. */
2820 ret
= riscv_resolve_pcrel_lo_relocs (&pcrel_relocs
);
2822 riscv_free_pcrel_relocs (&pcrel_relocs
);
2826 /* Finish up dynamic symbol handling. We set the contents of various
2827 dynamic sections here. */
2830 riscv_elf_finish_dynamic_symbol (bfd
*output_bfd
,
2831 struct bfd_link_info
*info
,
2832 struct elf_link_hash_entry
*h
,
2833 Elf_Internal_Sym
*sym
)
2835 struct riscv_elf_link_hash_table
*htab
= riscv_elf_hash_table (info
);
2836 const struct elf_backend_data
*bed
= get_elf_backend_data (output_bfd
);
2838 if (h
->plt
.offset
!= (bfd_vma
) -1)
2840 /* We've decided to create a PLT entry for this symbol. */
2842 bfd_vma i
, header_address
, plt_idx
, got_offset
, got_address
;
2843 uint32_t plt_entry
[PLT_ENTRY_INSNS
];
2844 Elf_Internal_Rela rela
;
2845 asection
*plt
, *gotplt
, *relplt
;
2847 /* When building a static executable, use .iplt, .igot.plt and
2848 .rela.iplt sections for STT_GNU_IFUNC symbols. */
2849 if (htab
->elf
.splt
!= NULL
)
2851 plt
= htab
->elf
.splt
;
2852 gotplt
= htab
->elf
.sgotplt
;
2853 relplt
= htab
->elf
.srelplt
;
2857 plt
= htab
->elf
.iplt
;
2858 gotplt
= htab
->elf
.igotplt
;
2859 relplt
= htab
->elf
.irelplt
;
2862 /* This symbol has an entry in the procedure linkage table. Set
2864 if ((h
->dynindx
== -1
2865 && !((h
->forced_local
|| bfd_link_executable (info
))
2867 && h
->type
== STT_GNU_IFUNC
))
2873 /* Calculate the address of the PLT header. */
2874 header_address
= sec_addr (plt
);
2876 /* Calculate the index of the entry and the offset of .got.plt entry.
2877 For static executables, we don't reserve anything. */
2878 if (plt
== htab
->elf
.splt
)
2880 plt_idx
= (h
->plt
.offset
- PLT_HEADER_SIZE
) / PLT_ENTRY_SIZE
;
2881 got_offset
= GOTPLT_HEADER_SIZE
+ (plt_idx
* GOT_ENTRY_SIZE
);
2885 plt_idx
= h
->plt
.offset
/ PLT_ENTRY_SIZE
;
2886 got_offset
= plt_idx
* GOT_ENTRY_SIZE
;
2889 /* Calculate the address of the .got.plt entry. */
2890 got_address
= sec_addr (gotplt
) + got_offset
;
2892 /* Find out where the .plt entry should go. */
2893 loc
= plt
->contents
+ h
->plt
.offset
;
2895 /* Fill in the PLT entry itself. */
2896 if (! riscv_make_plt_entry (output_bfd
, got_address
,
2897 header_address
+ h
->plt
.offset
,
2901 for (i
= 0; i
< PLT_ENTRY_INSNS
; i
++)
2902 bfd_putl32 (plt_entry
[i
], loc
+ 4*i
);
2904 /* Fill in the initial value of the .got.plt entry. */
2905 loc
= gotplt
->contents
+ (got_address
- sec_addr (gotplt
));
2906 bfd_put_NN (output_bfd
, sec_addr (plt
), loc
);
2908 rela
.r_offset
= got_address
;
2910 if (h
->dynindx
== -1
2911 || ((bfd_link_executable (info
)
2912 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2914 && h
->type
== STT_GNU_IFUNC
))
2916 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %pB\n"),
2917 h
->root
.root
.string
,
2918 h
->root
.u
.def
.section
->owner
);
2920 /* If an STT_GNU_IFUNC symbol is locally defined, generate
2921 R_RISCV_IRELATIVE instead of R_RISCV_JUMP_SLOT. */
2922 asection
*sec
= h
->root
.u
.def
.section
;
2923 rela
.r_info
= ELFNN_R_INFO (0, R_RISCV_IRELATIVE
);
2924 rela
.r_addend
= h
->root
.u
.def
.value
2925 + sec
->output_section
->vma
2926 + sec
->output_offset
;
2930 /* Fill in the entry in the .rela.plt section. */
2931 rela
.r_info
= ELFNN_R_INFO (h
->dynindx
, R_RISCV_JUMP_SLOT
);
2935 loc
= relplt
->contents
+ plt_idx
* sizeof (ElfNN_External_Rela
);
2936 bed
->s
->swap_reloca_out (output_bfd
, &rela
, loc
);
2938 if (!h
->def_regular
)
2940 /* Mark the symbol as undefined, rather than as defined in
2941 the .plt section. Leave the value alone. */
2942 sym
->st_shndx
= SHN_UNDEF
;
2943 /* If the symbol is weak, we do need to clear the value.
2944 Otherwise, the PLT entry would provide a definition for
2945 the symbol even if the symbol wasn't defined anywhere,
2946 and so the symbol would never be NULL. */
2947 if (!h
->ref_regular_nonweak
)
2952 if (h
->got
.offset
!= (bfd_vma
) -1
2953 && !(riscv_elf_hash_entry (h
)->tls_type
& (GOT_TLS_GD
| GOT_TLS_IE
))
2954 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
))
2958 Elf_Internal_Rela rela
;
2959 bfd_boolean use_elf_append_rela
= TRUE
;
2961 /* This symbol has an entry in the GOT. Set it up. */
2963 sgot
= htab
->elf
.sgot
;
2964 srela
= htab
->elf
.srelgot
;
2965 BFD_ASSERT (sgot
!= NULL
&& srela
!= NULL
);
2967 rela
.r_offset
= sec_addr (sgot
) + (h
->got
.offset
&~ (bfd_vma
) 1);
2969 /* Handle the ifunc symbol in GOT entry. */
2971 && h
->type
== STT_GNU_IFUNC
)
2973 if (h
->plt
.offset
== (bfd_vma
) -1)
2975 /* STT_GNU_IFUNC is referenced without PLT. */
2977 if (htab
->elf
.splt
== NULL
)
2979 /* Use .rela.iplt section to store .got relocations
2980 in static executable. */
2981 srela
= htab
->elf
.irelplt
;
2983 /* Do not use riscv_elf_append_rela to add dynamic
2985 use_elf_append_rela
= FALSE
;
2988 if (SYMBOL_REFERENCES_LOCAL (info
, h
))
2990 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %pB\n"),
2991 h
->root
.root
.string
,
2992 h
->root
.u
.def
.section
->owner
);
2994 rela
.r_info
= ELFNN_R_INFO (0, R_RISCV_IRELATIVE
);
2995 rela
.r_addend
= (h
->root
.u
.def
.value
2996 + h
->root
.u
.def
.section
->output_section
->vma
2997 + h
->root
.u
.def
.section
->output_offset
);
3001 /* Generate R_RISCV_NN. */
3002 BFD_ASSERT((h
->got
.offset
& 1) == 0);
3003 BFD_ASSERT (h
->dynindx
!= -1);
3004 rela
.r_info
= ELFNN_R_INFO (h
->dynindx
, R_RISCV_NN
);
3008 else if (bfd_link_pic (info
))
3010 /* Generate R_RISCV_NN. */
3011 BFD_ASSERT((h
->got
.offset
& 1) == 0);
3012 BFD_ASSERT (h
->dynindx
!= -1);
3013 rela
.r_info
= ELFNN_R_INFO (h
->dynindx
, R_RISCV_NN
);
3020 if (!h
->pointer_equality_needed
)
3023 /* For non-shared object, we can't use .got.plt, which
3024 contains the real function address if we need pointer
3025 equality. We load the GOT entry with the PLT entry. */
3026 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
3027 bfd_put_NN (output_bfd
, (plt
->output_section
->vma
3028 + plt
->output_offset
3030 htab
->elf
.sgot
->contents
3031 + (h
->got
.offset
& ~(bfd_vma
) 1));
3035 else if (bfd_link_pic (info
)
3036 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3038 /* If this is a local symbol reference, we just want to emit
3039 a RELATIVE reloc. This can happen if it is a -Bsymbolic link,
3040 or a pie link, or the symbol was forced to be local because
3041 of a version file. The entry in the global offset table will
3042 already have been initialized in the relocate_section function. */
3043 BFD_ASSERT((h
->got
.offset
& 1) != 0);
3044 asection
*sec
= h
->root
.u
.def
.section
;
3045 rela
.r_info
= ELFNN_R_INFO (0, R_RISCV_RELATIVE
);
3046 rela
.r_addend
= (h
->root
.u
.def
.value
3047 + sec
->output_section
->vma
3048 + sec
->output_offset
);
3052 BFD_ASSERT((h
->got
.offset
& 1) == 0);
3053 BFD_ASSERT (h
->dynindx
!= -1);
3054 rela
.r_info
= ELFNN_R_INFO (h
->dynindx
, R_RISCV_NN
);
3058 bfd_put_NN (output_bfd
, 0,
3059 sgot
->contents
+ (h
->got
.offset
& ~(bfd_vma
) 1));
3061 if (use_elf_append_rela
)
3062 riscv_elf_append_rela (output_bfd
, srela
, &rela
);
3065 /* Use riscv_elf_append_rela to add the dynamic relocs into
3066 .rela.iplt may cause the overwrite problems. Since we insert
3067 the relocs for PLT didn't handle the reloc_index of .rela.iplt,
3068 but the riscv_elf_append_rela adds the relocs to the place
3069 that are calculated from the reloc_index (in seqential).
3071 One solution is that add these dynamic relocs (GOT IFUNC)
3072 from the last of .rela.iplt section. */
3073 bfd_vma iplt_idx
= htab
->last_iplt_index
--;
3074 bfd_byte
*loc
= srela
->contents
3075 + iplt_idx
* sizeof (ElfNN_External_Rela
);
3076 bed
->s
->swap_reloca_out (output_bfd
, &rela
, loc
);
3082 Elf_Internal_Rela rela
;
3085 /* This symbols needs a copy reloc. Set it up. */
3086 BFD_ASSERT (h
->dynindx
!= -1);
3088 rela
.r_offset
= sec_addr (h
->root
.u
.def
.section
) + h
->root
.u
.def
.value
;
3089 rela
.r_info
= ELFNN_R_INFO (h
->dynindx
, R_RISCV_COPY
);
3091 if (h
->root
.u
.def
.section
== htab
->elf
.sdynrelro
)
3092 s
= htab
->elf
.sreldynrelro
;
3094 s
= htab
->elf
.srelbss
;
3095 riscv_elf_append_rela (output_bfd
, s
, &rela
);
3098 /* Mark some specially defined symbols as absolute. */
3099 if (h
== htab
->elf
.hdynamic
3100 || (h
== htab
->elf
.hgot
|| h
== htab
->elf
.hplt
))
3101 sym
->st_shndx
= SHN_ABS
;
3106 /* Finish up local dynamic symbol handling. We set the contents of
3107 various dynamic sections here. */
3110 riscv_elf_finish_local_dynamic_symbol (void **slot
, void *inf
)
3112 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*) *slot
;
3113 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
3115 return riscv_elf_finish_dynamic_symbol (info
->output_bfd
, info
, h
, NULL
);
3118 /* Finish up the dynamic sections. */
3121 riscv_finish_dyn (bfd
*output_bfd
, struct bfd_link_info
*info
,
3122 bfd
*dynobj
, asection
*sdyn
)
3124 struct riscv_elf_link_hash_table
*htab
= riscv_elf_hash_table (info
);
3125 const struct elf_backend_data
*bed
= get_elf_backend_data (output_bfd
);
3126 size_t dynsize
= bed
->s
->sizeof_dyn
;
3127 bfd_byte
*dyncon
, *dynconend
;
3129 dynconend
= sdyn
->contents
+ sdyn
->size
;
3130 for (dyncon
= sdyn
->contents
; dyncon
< dynconend
; dyncon
+= dynsize
)
3132 Elf_Internal_Dyn dyn
;
3135 bed
->s
->swap_dyn_in (dynobj
, dyncon
, &dyn
);
3140 s
= htab
->elf
.sgotplt
;
3141 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
3144 s
= htab
->elf
.srelplt
;
3145 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
3148 s
= htab
->elf
.srelplt
;
3149 dyn
.d_un
.d_val
= s
->size
;
3155 bed
->s
->swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3161 riscv_elf_finish_dynamic_sections (bfd
*output_bfd
,
3162 struct bfd_link_info
*info
)
3166 struct riscv_elf_link_hash_table
*htab
;
3168 htab
= riscv_elf_hash_table (info
);
3169 BFD_ASSERT (htab
!= NULL
);
3170 dynobj
= htab
->elf
.dynobj
;
3172 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
3174 if (elf_hash_table (info
)->dynamic_sections_created
)
3179 splt
= htab
->elf
.splt
;
3180 BFD_ASSERT (splt
!= NULL
&& sdyn
!= NULL
);
3182 ret
= riscv_finish_dyn (output_bfd
, info
, dynobj
, sdyn
);
3187 /* Fill in the head and tail entries in the procedure linkage table. */
3191 uint32_t plt_header
[PLT_HEADER_INSNS
];
3192 ret
= riscv_make_plt_header (output_bfd
,
3193 sec_addr (htab
->elf
.sgotplt
),
3194 sec_addr (splt
), plt_header
);
3198 for (i
= 0; i
< PLT_HEADER_INSNS
; i
++)
3199 bfd_putl32 (plt_header
[i
], splt
->contents
+ 4*i
);
3201 elf_section_data (splt
->output_section
)->this_hdr
.sh_entsize
3206 if (htab
->elf
.sgotplt
)
3208 asection
*output_section
= htab
->elf
.sgotplt
->output_section
;
3210 if (bfd_is_abs_section (output_section
))
3212 (*_bfd_error_handler
)
3213 (_("discarded output section: `%pA'"), htab
->elf
.sgotplt
);
3217 if (htab
->elf
.sgotplt
->size
> 0)
3219 /* Write the first two entries in .got.plt, needed for the dynamic
3221 bfd_put_NN (output_bfd
, (bfd_vma
) -1, htab
->elf
.sgotplt
->contents
);
3222 bfd_put_NN (output_bfd
, (bfd_vma
) 0,
3223 htab
->elf
.sgotplt
->contents
+ GOT_ENTRY_SIZE
);
3226 elf_section_data (output_section
)->this_hdr
.sh_entsize
= GOT_ENTRY_SIZE
;
3231 asection
*output_section
= htab
->elf
.sgot
->output_section
;
3233 if (htab
->elf
.sgot
->size
> 0)
3235 /* Set the first entry in the global offset table to the address of
3236 the dynamic section. */
3237 bfd_vma val
= sdyn
? sec_addr (sdyn
) : 0;
3238 bfd_put_NN (output_bfd
, val
, htab
->elf
.sgot
->contents
);
3241 elf_section_data (output_section
)->this_hdr
.sh_entsize
= GOT_ENTRY_SIZE
;
3244 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
3245 htab_traverse (htab
->loc_hash_table
,
3246 riscv_elf_finish_local_dynamic_symbol
,
3252 /* Return address for Ith PLT stub in section PLT, for relocation REL
3253 or (bfd_vma) -1 if it should not be included. */
3256 riscv_elf_plt_sym_val (bfd_vma i
, const asection
*plt
,
3257 const arelent
*rel ATTRIBUTE_UNUSED
)
3259 return plt
->vma
+ PLT_HEADER_SIZE
+ i
* PLT_ENTRY_SIZE
;
3262 static enum elf_reloc_type_class
3263 riscv_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
3264 const asection
*rel_sec ATTRIBUTE_UNUSED
,
3265 const Elf_Internal_Rela
*rela
)
3267 switch (ELFNN_R_TYPE (rela
->r_info
))
3269 case R_RISCV_RELATIVE
:
3270 return reloc_class_relative
;
3271 case R_RISCV_JUMP_SLOT
:
3272 return reloc_class_plt
;
3274 return reloc_class_copy
;
3276 return reloc_class_normal
;
3280 /* Given the ELF header flags in FLAGS, it returns a string that describes the
3284 riscv_float_abi_string (flagword flags
)
3286 switch (flags
& EF_RISCV_FLOAT_ABI
)
3288 case EF_RISCV_FLOAT_ABI_SOFT
:
3289 return "soft-float";
3291 case EF_RISCV_FLOAT_ABI_SINGLE
:
3292 return "single-float";
3294 case EF_RISCV_FLOAT_ABI_DOUBLE
:
3295 return "double-float";
3297 case EF_RISCV_FLOAT_ABI_QUAD
:
3298 return "quad-float";
3305 /* The information of architecture elf attributes. */
3306 static riscv_subset_list_t in_subsets
;
3307 static riscv_subset_list_t out_subsets
;
3308 static riscv_subset_list_t merged_subsets
;
3310 /* Predicator for standard extension. */
3313 riscv_std_ext_p (const char *name
)
3315 return (strlen (name
) == 1) && (name
[0] != 'x') && (name
[0] != 's');
3318 /* Check if the versions are compatible. */
3321 riscv_version_mismatch (bfd
*ibfd
,
3322 struct riscv_subset_t
*in
,
3323 struct riscv_subset_t
*out
)
3325 if (in
== NULL
|| out
== NULL
)
3328 /* Since there are no version conflicts for now, we just report
3329 warning when the versions are mis-matched. */
3330 if (in
->major_version
!= out
->major_version
3331 || in
->minor_version
!= out
->minor_version
)
3334 (_("warning: %pB: mis-matched ISA version %d.%d for '%s' "
3335 "extension, the output version is %d.%d"),
3341 out
->minor_version
);
3343 /* Update the output ISA versions to the newest ones. */
3344 if ((in
->major_version
> out
->major_version
)
3345 || (in
->major_version
== out
->major_version
3346 && in
->minor_version
> out
->minor_version
))
3348 out
->major_version
= in
->major_version
;
3349 out
->minor_version
= in
->minor_version
;
3356 /* Return true if subset is 'i' or 'e'. */
3359 riscv_i_or_e_p (bfd
*ibfd
,
3361 struct riscv_subset_t
*subset
)
3363 if ((strcasecmp (subset
->name
, "e") != 0)
3364 && (strcasecmp (subset
->name
, "i") != 0))
3367 (_("error: %pB: corrupted ISA string '%s'. "
3368 "First letter should be 'i' or 'e' but got '%s'"),
3369 ibfd
, arch
, subset
->name
);
3375 /* Merge standard extensions.
3378 Return FALSE if failed to merge.
3382 `in_arch`: Raw ISA string for input object.
3383 `out_arch`: Raw ISA string for output object.
3384 `pin`: Subset list for input object.
3385 `pout`: Subset list for output object. */
3388 riscv_merge_std_ext (bfd
*ibfd
,
3389 const char *in_arch
,
3390 const char *out_arch
,
3391 struct riscv_subset_t
**pin
,
3392 struct riscv_subset_t
**pout
)
3394 const char *standard_exts
= riscv_supported_std_ext ();
3396 struct riscv_subset_t
*in
= *pin
;
3397 struct riscv_subset_t
*out
= *pout
;
3399 /* First letter should be 'i' or 'e'. */
3400 if (!riscv_i_or_e_p (ibfd
, in_arch
, in
))
3403 if (!riscv_i_or_e_p (ibfd
, out_arch
, out
))
3406 if (strcasecmp (in
->name
, out
->name
) != 0)
3408 /* TODO: We might allow merge 'i' with 'e'. */
3410 (_("error: %pB: mis-matched ISA string to merge '%s' and '%s'"),
3411 ibfd
, in
->name
, out
->name
);
3414 else if (!riscv_version_mismatch (ibfd
, in
, out
))
3417 riscv_add_subset (&merged_subsets
,
3418 out
->name
, out
->major_version
, out
->minor_version
);
3423 /* Handle standard extension first. */
3424 for (p
= standard_exts
; *p
; ++p
)
3426 struct riscv_subset_t
*ext_in
, *ext_out
, *ext_merged
;
3427 char find_ext
[2] = {*p
, '\0'};
3428 bfd_boolean find_in
, find_out
;
3430 find_in
= riscv_lookup_subset (&in_subsets
, find_ext
, &ext_in
);
3431 find_out
= riscv_lookup_subset (&out_subsets
, find_ext
, &ext_out
);
3433 if (!find_in
&& !find_out
)
3438 && !riscv_version_mismatch (ibfd
, ext_in
, ext_out
))
3441 ext_merged
= find_out
? ext_out
: ext_in
;
3442 riscv_add_subset (&merged_subsets
, ext_merged
->name
,
3443 ext_merged
->major_version
, ext_merged
->minor_version
);
3446 /* Skip all standard extensions. */
3447 while ((in
!= NULL
) && riscv_std_ext_p (in
->name
)) in
= in
->next
;
3448 while ((out
!= NULL
) && riscv_std_ext_p (out
->name
)) out
= out
->next
;
3456 /* Merge multi letter extensions. PIN is a pointer to the head of the input
3457 object subset list. Likewise for POUT and the output object. Return TRUE
3458 on success and FALSE when a conflict is found. */
3461 riscv_merge_multi_letter_ext (bfd
*ibfd
,
3462 riscv_subset_t
**pin
,
3463 riscv_subset_t
**pout
)
3465 riscv_subset_t
*in
= *pin
;
3466 riscv_subset_t
*out
= *pout
;
3467 riscv_subset_t
*tail
;
3473 cmp
= riscv_compare_subsets (in
->name
, out
->name
);
3477 /* `in' comes before `out', append `in' and increment. */
3478 riscv_add_subset (&merged_subsets
, in
->name
, in
->major_version
,
3484 /* `out' comes before `in', append `out' and increment. */
3485 riscv_add_subset (&merged_subsets
, out
->name
, out
->major_version
,
3486 out
->minor_version
);
3491 /* Both present, check version and increment both. */
3492 if (!riscv_version_mismatch (ibfd
, in
, out
))
3495 riscv_add_subset (&merged_subsets
, out
->name
, out
->major_version
,
3496 out
->minor_version
);
3503 /* If we're here, either `in' or `out' is running longer than
3504 the other. So, we need to append the corresponding tail. */
3505 tail
= in
? in
: out
;
3509 riscv_add_subset (&merged_subsets
, tail
->name
, tail
->major_version
,
3510 tail
->minor_version
);
3518 /* Merge Tag_RISCV_arch attribute. */
3521 riscv_merge_arch_attr_info (bfd
*ibfd
, char *in_arch
, char *out_arch
)
3523 riscv_subset_t
*in
, *out
;
3524 char *merged_arch_str
;
3526 unsigned xlen_in
, xlen_out
;
3527 merged_subsets
.head
= NULL
;
3528 merged_subsets
.tail
= NULL
;
3530 riscv_parse_subset_t rpe_in
;
3531 riscv_parse_subset_t rpe_out
;
3533 /* Only assembler needs to check the default version of ISA, so just set
3534 the rpe_in.get_default_version and rpe_out.get_default_version to NULL. */
3535 rpe_in
.subset_list
= &in_subsets
;
3536 rpe_in
.error_handler
= _bfd_error_handler
;
3537 rpe_in
.xlen
= &xlen_in
;
3538 rpe_in
.get_default_version
= NULL
;
3540 rpe_out
.subset_list
= &out_subsets
;
3541 rpe_out
.error_handler
= _bfd_error_handler
;
3542 rpe_out
.xlen
= &xlen_out
;
3543 rpe_out
.get_default_version
= NULL
;
3545 if (in_arch
== NULL
&& out_arch
== NULL
)
3548 if (in_arch
== NULL
&& out_arch
!= NULL
)
3551 if (in_arch
!= NULL
&& out_arch
== NULL
)
3554 /* Parse subset from ISA string. */
3555 if (!riscv_parse_subset (&rpe_in
, in_arch
))
3558 if (!riscv_parse_subset (&rpe_out
, out_arch
))
3561 /* Checking XLEN. */
3562 if (xlen_out
!= xlen_in
)
3565 (_("error: %pB: ISA string of input (%s) doesn't match "
3566 "output (%s)"), ibfd
, in_arch
, out_arch
);
3570 /* Merge subset list. */
3571 in
= in_subsets
.head
;
3572 out
= out_subsets
.head
;
3574 /* Merge standard extension. */
3575 if (!riscv_merge_std_ext (ibfd
, in_arch
, out_arch
, &in
, &out
))
3578 /* Merge all non-single letter extensions with single call. */
3579 if (!riscv_merge_multi_letter_ext (ibfd
, &in
, &out
))
3582 if (xlen_in
!= xlen_out
)
3585 (_("error: %pB: XLEN of input (%u) doesn't match "
3586 "output (%u)"), ibfd
, xlen_in
, xlen_out
);
3590 if (xlen_in
!= ARCH_SIZE
)
3593 (_("error: %pB: unsupported XLEN (%u), you might be "
3594 "using wrong emulation"), ibfd
, xlen_in
);
3598 merged_arch_str
= riscv_arch_str (ARCH_SIZE
, &merged_subsets
);
3600 /* Release the subset lists. */
3601 riscv_release_subset_list (&in_subsets
);
3602 riscv_release_subset_list (&out_subsets
);
3603 riscv_release_subset_list (&merged_subsets
);
3605 return merged_arch_str
;
3608 /* Merge object attributes from IBFD into output_bfd of INFO.
3609 Raise an error if there are conflicting attributes. */
3612 riscv_merge_attributes (bfd
*ibfd
, struct bfd_link_info
*info
)
3614 bfd
*obfd
= info
->output_bfd
;
3615 obj_attribute
*in_attr
;
3616 obj_attribute
*out_attr
;
3617 bfd_boolean result
= TRUE
;
3618 bfd_boolean priv_attrs_merged
= FALSE
;
3619 const char *sec_name
= get_elf_backend_data (ibfd
)->obj_attrs_section
;
3622 /* Skip linker created files. */
3623 if (ibfd
->flags
& BFD_LINKER_CREATED
)
3626 /* Skip any input that doesn't have an attribute section.
3627 This enables to link object files without attribute section with
3629 if (bfd_get_section_by_name (ibfd
, sec_name
) == NULL
)
3632 if (!elf_known_obj_attributes_proc (obfd
)[0].i
)
3634 /* This is the first object. Copy the attributes. */
3635 _bfd_elf_copy_obj_attributes (ibfd
, obfd
);
3637 out_attr
= elf_known_obj_attributes_proc (obfd
);
3639 /* Use the Tag_null value to indicate the attributes have been
3646 in_attr
= elf_known_obj_attributes_proc (ibfd
);
3647 out_attr
= elf_known_obj_attributes_proc (obfd
);
3649 for (i
= LEAST_KNOWN_OBJ_ATTRIBUTE
; i
< NUM_KNOWN_OBJ_ATTRIBUTES
; i
++)
3653 case Tag_RISCV_arch
:
3654 if (!out_attr
[Tag_RISCV_arch
].s
)
3655 out_attr
[Tag_RISCV_arch
].s
= in_attr
[Tag_RISCV_arch
].s
;
3656 else if (in_attr
[Tag_RISCV_arch
].s
3657 && out_attr
[Tag_RISCV_arch
].s
)
3659 /* Check compatible. */
3661 riscv_merge_arch_attr_info (ibfd
,
3662 in_attr
[Tag_RISCV_arch
].s
,
3663 out_attr
[Tag_RISCV_arch
].s
);
3664 if (merged_arch
== NULL
)
3667 out_attr
[Tag_RISCV_arch
].s
= "";
3670 out_attr
[Tag_RISCV_arch
].s
= merged_arch
;
3674 case Tag_RISCV_priv_spec
:
3675 case Tag_RISCV_priv_spec_minor
:
3676 case Tag_RISCV_priv_spec_revision
:
3677 /* If we have handled the privileged elf attributes, then skip it. */
3678 if (!priv_attrs_merged
)
3680 unsigned int Tag_a
= Tag_RISCV_priv_spec
;
3681 unsigned int Tag_b
= Tag_RISCV_priv_spec_minor
;
3682 unsigned int Tag_c
= Tag_RISCV_priv_spec_revision
;
3683 enum riscv_priv_spec_class in_priv_spec
;
3684 enum riscv_priv_spec_class out_priv_spec
;
3686 /* Get the privileged spec class from elf attributes. */
3687 riscv_get_priv_spec_class_from_numbers (in_attr
[Tag_a
].i
,
3691 riscv_get_priv_spec_class_from_numbers (out_attr
[Tag_a
].i
,
3696 /* Allow to link the object without the privileged specs. */
3697 if (out_priv_spec
== PRIV_SPEC_CLASS_NONE
)
3699 out_attr
[Tag_a
].i
= in_attr
[Tag_a
].i
;
3700 out_attr
[Tag_b
].i
= in_attr
[Tag_b
].i
;
3701 out_attr
[Tag_c
].i
= in_attr
[Tag_c
].i
;
3703 else if (in_priv_spec
!= PRIV_SPEC_CLASS_NONE
3704 && in_priv_spec
!= out_priv_spec
)
3707 (_("warning: %pB use privileged spec version %u.%u.%u but "
3708 "the output use version %u.%u.%u"),
3717 /* The privileged spec v1.9.1 can not be linked with others
3718 since the conflicts, so we plan to drop it in a year or
3720 if (in_priv_spec
== PRIV_SPEC_CLASS_1P9P1
3721 || out_priv_spec
== PRIV_SPEC_CLASS_1P9P1
)
3724 (_("warning: privileged spec version 1.9.1 can not be "
3725 "linked with other spec versions"));
3728 /* Update the output privileged spec to the newest one. */
3729 if (in_priv_spec
> out_priv_spec
)
3731 out_attr
[Tag_a
].i
= in_attr
[Tag_a
].i
;
3732 out_attr
[Tag_b
].i
= in_attr
[Tag_b
].i
;
3733 out_attr
[Tag_c
].i
= in_attr
[Tag_c
].i
;
3736 priv_attrs_merged
= TRUE
;
3740 case Tag_RISCV_unaligned_access
:
3741 out_attr
[i
].i
|= in_attr
[i
].i
;
3744 case Tag_RISCV_stack_align
:
3745 if (out_attr
[i
].i
== 0)
3746 out_attr
[i
].i
= in_attr
[i
].i
;
3747 else if (in_attr
[i
].i
!= 0
3748 && out_attr
[i
].i
!= 0
3749 && out_attr
[i
].i
!= in_attr
[i
].i
)
3752 (_("error: %pB use %u-byte stack aligned but the output "
3753 "use %u-byte stack aligned"),
3754 ibfd
, in_attr
[i
].i
, out_attr
[i
].i
);
3760 result
&= _bfd_elf_merge_unknown_attribute_low (ibfd
, obfd
, i
);
3763 /* If out_attr was copied from in_attr then it won't have a type yet. */
3764 if (in_attr
[i
].type
&& !out_attr
[i
].type
)
3765 out_attr
[i
].type
= in_attr
[i
].type
;
3768 /* Merge Tag_compatibility attributes and any common GNU ones. */
3769 if (!_bfd_elf_merge_object_attributes (ibfd
, info
))
3772 /* Check for any attributes not known on RISC-V. */
3773 result
&= _bfd_elf_merge_unknown_attribute_list (ibfd
, obfd
);
3778 /* Merge backend specific data from an object file to the output
3779 object file when linking. */
3782 _bfd_riscv_elf_merge_private_bfd_data (bfd
*ibfd
, struct bfd_link_info
*info
)
3784 bfd
*obfd
= info
->output_bfd
;
3785 flagword new_flags
, old_flags
;
3787 if (!is_riscv_elf (ibfd
) || !is_riscv_elf (obfd
))
3790 if (strcmp (bfd_get_target (ibfd
), bfd_get_target (obfd
)) != 0)
3792 (*_bfd_error_handler
)
3793 (_("%pB: ABI is incompatible with that of the selected emulation:\n"
3794 " target emulation `%s' does not match `%s'"),
3795 ibfd
, bfd_get_target (ibfd
), bfd_get_target (obfd
));
3799 if (!_bfd_elf_merge_object_attributes (ibfd
, info
))
3802 if (!riscv_merge_attributes (ibfd
, info
))
3805 new_flags
= elf_elfheader (ibfd
)->e_flags
;
3806 old_flags
= elf_elfheader (obfd
)->e_flags
;
3808 if (! elf_flags_init (obfd
))
3810 elf_flags_init (obfd
) = TRUE
;
3811 elf_elfheader (obfd
)->e_flags
= new_flags
;
3815 /* Check to see if the input BFD actually contains any sections. If not,
3816 its flags may not have been initialized either, but it cannot actually
3817 cause any incompatibility. Do not short-circuit dynamic objects; their
3818 section list may be emptied by elf_link_add_object_symbols.
3820 Also check to see if there are no code sections in the input. In this
3821 case, there is no need to check for code specific flags. */
3822 if (!(ibfd
->flags
& DYNAMIC
))
3824 bfd_boolean null_input_bfd
= TRUE
;
3825 bfd_boolean only_data_sections
= TRUE
;
3828 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
3830 if ((bfd_section_flags (sec
)
3831 & (SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
))
3832 == (SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
))
3833 only_data_sections
= FALSE
;
3835 null_input_bfd
= FALSE
;
3839 if (null_input_bfd
|| only_data_sections
)
3843 /* Disallow linking different float ABIs. */
3844 if ((old_flags
^ new_flags
) & EF_RISCV_FLOAT_ABI
)
3846 (*_bfd_error_handler
)
3847 (_("%pB: can't link %s modules with %s modules"), ibfd
,
3848 riscv_float_abi_string (new_flags
),
3849 riscv_float_abi_string (old_flags
));
3853 /* Disallow linking RVE and non-RVE. */
3854 if ((old_flags
^ new_flags
) & EF_RISCV_RVE
)
3856 (*_bfd_error_handler
)
3857 (_("%pB: can't link RVE with other target"), ibfd
);
3861 /* Allow linking RVC and non-RVC, and keep the RVC flag. */
3862 elf_elfheader (obfd
)->e_flags
|= new_flags
& EF_RISCV_RVC
;
3867 bfd_set_error (bfd_error_bad_value
);
3871 /* Delete some bytes from a section while relaxing. */
3874 riscv_relax_delete_bytes (bfd
*abfd
, asection
*sec
, bfd_vma addr
, size_t count
,
3875 struct bfd_link_info
*link_info
)
3877 unsigned int i
, symcount
;
3878 bfd_vma toaddr
= sec
->size
;
3879 struct elf_link_hash_entry
**sym_hashes
= elf_sym_hashes (abfd
);
3880 Elf_Internal_Shdr
*symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3881 unsigned int sec_shndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
3882 struct bfd_elf_section_data
*data
= elf_section_data (sec
);
3883 bfd_byte
*contents
= data
->this_hdr
.contents
;
3885 /* Actually delete the bytes. */
3887 memmove (contents
+ addr
, contents
+ addr
+ count
, toaddr
- addr
- count
);
3889 /* Adjust the location of all of the relocs. Note that we need not
3890 adjust the addends, since all PC-relative references must be against
3891 symbols, which we will adjust below. */
3892 for (i
= 0; i
< sec
->reloc_count
; i
++)
3893 if (data
->relocs
[i
].r_offset
> addr
&& data
->relocs
[i
].r_offset
< toaddr
)
3894 data
->relocs
[i
].r_offset
-= count
;
3896 /* Adjust the local symbols defined in this section. */
3897 for (i
= 0; i
< symtab_hdr
->sh_info
; i
++)
3899 Elf_Internal_Sym
*sym
= (Elf_Internal_Sym
*) symtab_hdr
->contents
+ i
;
3900 if (sym
->st_shndx
== sec_shndx
)
3902 /* If the symbol is in the range of memory we just moved, we
3903 have to adjust its value. */
3904 if (sym
->st_value
> addr
&& sym
->st_value
<= toaddr
)
3905 sym
->st_value
-= count
;
3907 /* If the symbol *spans* the bytes we just deleted (i.e. its
3908 *end* is in the moved bytes but its *start* isn't), then we
3909 must adjust its size.
3911 This test needs to use the original value of st_value, otherwise
3912 we might accidentally decrease size when deleting bytes right
3913 before the symbol. But since deleted relocs can't span across
3914 symbols, we can't have both a st_value and a st_size decrease,
3915 so it is simpler to just use an else. */
3916 else if (sym
->st_value
<= addr
3917 && sym
->st_value
+ sym
->st_size
> addr
3918 && sym
->st_value
+ sym
->st_size
<= toaddr
)
3919 sym
->st_size
-= count
;
3923 /* Now adjust the global symbols defined in this section. */
3924 symcount
= ((symtab_hdr
->sh_size
/ sizeof (ElfNN_External_Sym
))
3925 - symtab_hdr
->sh_info
);
3927 for (i
= 0; i
< symcount
; i
++)
3929 struct elf_link_hash_entry
*sym_hash
= sym_hashes
[i
];
3931 /* The '--wrap SYMBOL' option is causing a pain when the object file,
3932 containing the definition of __wrap_SYMBOL, includes a direct
3933 call to SYMBOL as well. Since both __wrap_SYMBOL and SYMBOL reference
3934 the same symbol (which is __wrap_SYMBOL), but still exist as two
3935 different symbols in 'sym_hashes', we don't want to adjust
3936 the global symbol __wrap_SYMBOL twice.
3938 The same problem occurs with symbols that are versioned_hidden, as
3939 foo becomes an alias for foo@BAR, and hence they need the same
3941 if (link_info
->wrap_hash
!= NULL
3942 || sym_hash
->versioned
== versioned_hidden
)
3944 struct elf_link_hash_entry
**cur_sym_hashes
;
3946 /* Loop only over the symbols which have already been checked. */
3947 for (cur_sym_hashes
= sym_hashes
; cur_sym_hashes
< &sym_hashes
[i
];
3950 /* If the current symbol is identical to 'sym_hash', that means
3951 the symbol was already adjusted (or at least checked). */
3952 if (*cur_sym_hashes
== sym_hash
)
3955 /* Don't adjust the symbol again. */
3956 if (cur_sym_hashes
< &sym_hashes
[i
])
3960 if ((sym_hash
->root
.type
== bfd_link_hash_defined
3961 || sym_hash
->root
.type
== bfd_link_hash_defweak
)
3962 && sym_hash
->root
.u
.def
.section
== sec
)
3964 /* As above, adjust the value if needed. */
3965 if (sym_hash
->root
.u
.def
.value
> addr
3966 && sym_hash
->root
.u
.def
.value
<= toaddr
)
3967 sym_hash
->root
.u
.def
.value
-= count
;
3969 /* As above, adjust the size if needed. */
3970 else if (sym_hash
->root
.u
.def
.value
<= addr
3971 && sym_hash
->root
.u
.def
.value
+ sym_hash
->size
> addr
3972 && sym_hash
->root
.u
.def
.value
+ sym_hash
->size
<= toaddr
)
3973 sym_hash
->size
-= count
;
3980 /* A second format for recording PC-relative hi relocations. This stores the
3981 information required to relax them to GP-relative addresses. */
3983 typedef struct riscv_pcgp_hi_reloc riscv_pcgp_hi_reloc
;
3984 struct riscv_pcgp_hi_reloc
3991 bfd_boolean undefined_weak
;
3992 riscv_pcgp_hi_reloc
*next
;
3995 typedef struct riscv_pcgp_lo_reloc riscv_pcgp_lo_reloc
;
3996 struct riscv_pcgp_lo_reloc
3999 riscv_pcgp_lo_reloc
*next
;
4004 riscv_pcgp_hi_reloc
*hi
;
4005 riscv_pcgp_lo_reloc
*lo
;
4006 } riscv_pcgp_relocs
;
4008 /* Initialize the pcgp reloc info in P. */
4011 riscv_init_pcgp_relocs (riscv_pcgp_relocs
*p
)
4018 /* Free the pcgp reloc info in P. */
4021 riscv_free_pcgp_relocs (riscv_pcgp_relocs
*p
,
4022 bfd
*abfd ATTRIBUTE_UNUSED
,
4023 asection
*sec ATTRIBUTE_UNUSED
)
4025 riscv_pcgp_hi_reloc
*c
;
4026 riscv_pcgp_lo_reloc
*l
;
4028 for (c
= p
->hi
; c
!= NULL
;)
4030 riscv_pcgp_hi_reloc
*next
= c
->next
;
4035 for (l
= p
->lo
; l
!= NULL
;)
4037 riscv_pcgp_lo_reloc
*next
= l
->next
;
4043 /* Record pcgp hi part reloc info in P, using HI_SEC_OFF as the lookup index.
4044 The HI_ADDEND, HI_ADDR, HI_SYM, and SYM_SEC args contain info required to
4045 relax the corresponding lo part reloc. */
4048 riscv_record_pcgp_hi_reloc (riscv_pcgp_relocs
*p
, bfd_vma hi_sec_off
,
4049 bfd_vma hi_addend
, bfd_vma hi_addr
,
4050 unsigned hi_sym
, asection
*sym_sec
,
4051 bfd_boolean undefined_weak
)
4053 riscv_pcgp_hi_reloc
*new = bfd_malloc (sizeof(*new));
4056 new->hi_sec_off
= hi_sec_off
;
4057 new->hi_addend
= hi_addend
;
4058 new->hi_addr
= hi_addr
;
4059 new->hi_sym
= hi_sym
;
4060 new->sym_sec
= sym_sec
;
4061 new->undefined_weak
= undefined_weak
;
4067 /* Look up hi part pcgp reloc info in P, using HI_SEC_OFF as the lookup index.
4068 This is used by a lo part reloc to find the corresponding hi part reloc. */
4070 static riscv_pcgp_hi_reloc
*
4071 riscv_find_pcgp_hi_reloc(riscv_pcgp_relocs
*p
, bfd_vma hi_sec_off
)
4073 riscv_pcgp_hi_reloc
*c
;
4075 for (c
= p
->hi
; c
!= NULL
; c
= c
->next
)
4076 if (c
->hi_sec_off
== hi_sec_off
)
4081 /* Record pcgp lo part reloc info in P, using HI_SEC_OFF as the lookup info.
4082 This is used to record relocs that can't be relaxed. */
4085 riscv_record_pcgp_lo_reloc (riscv_pcgp_relocs
*p
, bfd_vma hi_sec_off
)
4087 riscv_pcgp_lo_reloc
*new = bfd_malloc (sizeof(*new));
4090 new->hi_sec_off
= hi_sec_off
;
4096 /* Look up lo part pcgp reloc info in P, using HI_SEC_OFF as the lookup index.
4097 This is used by a hi part reloc to find the corresponding lo part reloc. */
4100 riscv_find_pcgp_lo_reloc (riscv_pcgp_relocs
*p
, bfd_vma hi_sec_off
)
4102 riscv_pcgp_lo_reloc
*c
;
4104 for (c
= p
->lo
; c
!= NULL
; c
= c
->next
)
4105 if (c
->hi_sec_off
== hi_sec_off
)
4110 typedef bfd_boolean (*relax_func_t
) (bfd
*, asection
*, asection
*,
4111 struct bfd_link_info
*,
4112 Elf_Internal_Rela
*,
4113 bfd_vma
, bfd_vma
, bfd_vma
, bfd_boolean
*,
4114 riscv_pcgp_relocs
*,
4115 bfd_boolean undefined_weak
);
4117 /* Relax AUIPC + JALR into JAL. */
4120 _bfd_riscv_relax_call (bfd
*abfd
, asection
*sec
, asection
*sym_sec
,
4121 struct bfd_link_info
*link_info
,
4122 Elf_Internal_Rela
*rel
,
4124 bfd_vma max_alignment
,
4125 bfd_vma reserve_size ATTRIBUTE_UNUSED
,
4127 riscv_pcgp_relocs
*pcgp_relocs ATTRIBUTE_UNUSED
,
4128 bfd_boolean undefined_weak ATTRIBUTE_UNUSED
)
4130 bfd_byte
*contents
= elf_section_data (sec
)->this_hdr
.contents
;
4131 bfd_vma foff
= symval
- (sec_addr (sec
) + rel
->r_offset
);
4132 bfd_boolean near_zero
= (symval
+ RISCV_IMM_REACH
/2) < RISCV_IMM_REACH
;
4133 bfd_vma auipc
, jalr
;
4134 int rd
, r_type
, len
= 4, rvc
= elf_elfheader (abfd
)->e_flags
& EF_RISCV_RVC
;
4136 /* If the call crosses section boundaries, an alignment directive could
4137 cause the PC-relative offset to later increase, so we need to add in the
4138 max alignment of any section inclusive from the call to the target.
4139 Otherwise, we only need to use the alignment of the current section. */
4140 if (VALID_UJTYPE_IMM (foff
))
4142 if (sym_sec
->output_section
== sec
->output_section
4143 && sym_sec
->output_section
!= bfd_abs_section_ptr
)
4144 max_alignment
= (bfd_vma
) 1 << sym_sec
->output_section
->alignment_power
;
4145 foff
+= ((bfd_signed_vma
) foff
< 0 ? -max_alignment
: max_alignment
);
4148 /* See if this function call can be shortened. */
4149 if (!VALID_UJTYPE_IMM (foff
) && !(!bfd_link_pic (link_info
) && near_zero
))
4152 /* Shorten the function call. */
4153 BFD_ASSERT (rel
->r_offset
+ 8 <= sec
->size
);
4155 auipc
= bfd_getl32 (contents
+ rel
->r_offset
);
4156 jalr
= bfd_getl32 (contents
+ rel
->r_offset
+ 4);
4157 rd
= (jalr
>> OP_SH_RD
) & OP_MASK_RD
;
4158 rvc
= rvc
&& VALID_RVC_J_IMM (foff
);
4160 /* C.J exists on RV32 and RV64, but C.JAL is RV32-only. */
4161 rvc
= rvc
&& (rd
== 0 || (rd
== X_RA
&& ARCH_SIZE
== 32));
4165 /* Relax to C.J[AL] rd, addr. */
4166 r_type
= R_RISCV_RVC_JUMP
;
4167 auipc
= rd
== 0 ? MATCH_C_J
: MATCH_C_JAL
;
4170 else if (VALID_UJTYPE_IMM (foff
))
4172 /* Relax to JAL rd, addr. */
4173 r_type
= R_RISCV_JAL
;
4174 auipc
= MATCH_JAL
| (rd
<< OP_SH_RD
);
4178 /* Near zero, relax to JALR rd, x0, addr. */
4179 r_type
= R_RISCV_LO12_I
;
4180 auipc
= MATCH_JALR
| (rd
<< OP_SH_RD
);
4183 /* Replace the R_RISCV_CALL reloc. */
4184 rel
->r_info
= ELFNN_R_INFO (ELFNN_R_SYM (rel
->r_info
), r_type
);
4185 /* Replace the AUIPC. */
4186 riscv_put_insn (8 * len
, auipc
, contents
+ rel
->r_offset
);
4188 /* Delete unnecessary JALR. */
4190 return riscv_relax_delete_bytes (abfd
, sec
, rel
->r_offset
+ len
, 8 - len
,
4194 /* Traverse all output sections and return the max alignment. */
4197 _bfd_riscv_get_max_alignment (asection
*sec
)
4199 unsigned int max_alignment_power
= 0;
4202 for (o
= sec
->output_section
->owner
->sections
; o
!= NULL
; o
= o
->next
)
4204 if (o
->alignment_power
> max_alignment_power
)
4205 max_alignment_power
= o
->alignment_power
;
4208 return (bfd_vma
) 1 << max_alignment_power
;
4211 /* Relax non-PIC global variable references to GP-relative references. */
4214 _bfd_riscv_relax_lui (bfd
*abfd
,
4217 struct bfd_link_info
*link_info
,
4218 Elf_Internal_Rela
*rel
,
4220 bfd_vma max_alignment
,
4221 bfd_vma reserve_size
,
4223 riscv_pcgp_relocs
*pcgp_relocs ATTRIBUTE_UNUSED
,
4224 bfd_boolean undefined_weak
)
4226 bfd_byte
*contents
= elf_section_data (sec
)->this_hdr
.contents
;
4227 bfd_vma gp
= riscv_global_pointer_value (link_info
);
4228 int use_rvc
= elf_elfheader (abfd
)->e_flags
& EF_RISCV_RVC
;
4230 BFD_ASSERT (rel
->r_offset
+ 4 <= sec
->size
);
4234 /* If gp and the symbol are in the same output section, which is not the
4235 abs section, then consider only that output section's alignment. */
4236 struct bfd_link_hash_entry
*h
=
4237 bfd_link_hash_lookup (link_info
->hash
, RISCV_GP_SYMBOL
, FALSE
, FALSE
,
4239 if (h
->u
.def
.section
->output_section
== sym_sec
->output_section
4240 && sym_sec
->output_section
!= bfd_abs_section_ptr
)
4241 max_alignment
= (bfd_vma
) 1 << sym_sec
->output_section
->alignment_power
;
4244 /* Is the reference in range of x0 or gp?
4245 Valid gp range conservatively because of alignment issue. */
4247 || (VALID_ITYPE_IMM (symval
)
4249 && VALID_ITYPE_IMM (symval
- gp
+ max_alignment
+ reserve_size
))
4251 && VALID_ITYPE_IMM (symval
- gp
- max_alignment
- reserve_size
))))
4253 unsigned sym
= ELFNN_R_SYM (rel
->r_info
);
4254 switch (ELFNN_R_TYPE (rel
->r_info
))
4256 case R_RISCV_LO12_I
:
4259 /* Change the RS1 to zero. */
4260 bfd_vma insn
= bfd_getl32 (contents
+ rel
->r_offset
);
4261 insn
&= ~(OP_MASK_RS1
<< OP_SH_RS1
);
4262 bfd_putl32 (insn
, contents
+ rel
->r_offset
);
4265 rel
->r_info
= ELFNN_R_INFO (sym
, R_RISCV_GPREL_I
);
4268 case R_RISCV_LO12_S
:
4271 /* Change the RS1 to zero. */
4272 bfd_vma insn
= bfd_getl32 (contents
+ rel
->r_offset
);
4273 insn
&= ~(OP_MASK_RS1
<< OP_SH_RS1
);
4274 bfd_putl32 (insn
, contents
+ rel
->r_offset
);
4277 rel
->r_info
= ELFNN_R_INFO (sym
, R_RISCV_GPREL_S
);
4281 /* We can delete the unnecessary LUI and reloc. */
4282 rel
->r_info
= ELFNN_R_INFO (0, R_RISCV_NONE
);
4284 return riscv_relax_delete_bytes (abfd
, sec
, rel
->r_offset
, 4,
4292 /* Can we relax LUI to C.LUI? Alignment might move the section forward;
4293 account for this assuming page alignment at worst. In the presence of
4294 RELRO segment the linker aligns it by one page size, therefore sections
4295 after the segment can be moved more than one page. */
4298 && ELFNN_R_TYPE (rel
->r_info
) == R_RISCV_HI20
4299 && VALID_RVC_LUI_IMM (RISCV_CONST_HIGH_PART (symval
))
4300 && VALID_RVC_LUI_IMM (RISCV_CONST_HIGH_PART (symval
)
4301 + (link_info
->relro
? 2 * ELF_MAXPAGESIZE
4302 : ELF_MAXPAGESIZE
)))
4304 /* Replace LUI with C.LUI if legal (i.e., rd != x0 and rd != x2/sp). */
4305 bfd_vma lui
= bfd_getl32 (contents
+ rel
->r_offset
);
4306 unsigned rd
= ((unsigned)lui
>> OP_SH_RD
) & OP_MASK_RD
;
4307 if (rd
== 0 || rd
== X_SP
)
4310 lui
= (lui
& (OP_MASK_RD
<< OP_SH_RD
)) | MATCH_C_LUI
;
4311 bfd_putl32 (lui
, contents
+ rel
->r_offset
);
4313 /* Replace the R_RISCV_HI20 reloc. */
4314 rel
->r_info
= ELFNN_R_INFO (ELFNN_R_SYM (rel
->r_info
), R_RISCV_RVC_LUI
);
4317 return riscv_relax_delete_bytes (abfd
, sec
, rel
->r_offset
+ 2, 2,
4324 /* Relax non-PIC TLS references to TP-relative references. */
4327 _bfd_riscv_relax_tls_le (bfd
*abfd
,
4329 asection
*sym_sec ATTRIBUTE_UNUSED
,
4330 struct bfd_link_info
*link_info
,
4331 Elf_Internal_Rela
*rel
,
4333 bfd_vma max_alignment ATTRIBUTE_UNUSED
,
4334 bfd_vma reserve_size ATTRIBUTE_UNUSED
,
4336 riscv_pcgp_relocs
*prcel_relocs ATTRIBUTE_UNUSED
,
4337 bfd_boolean undefined_weak ATTRIBUTE_UNUSED
)
4339 /* See if this symbol is in range of tp. */
4340 if (RISCV_CONST_HIGH_PART (tpoff (link_info
, symval
)) != 0)
4343 BFD_ASSERT (rel
->r_offset
+ 4 <= sec
->size
);
4344 switch (ELFNN_R_TYPE (rel
->r_info
))
4346 case R_RISCV_TPREL_LO12_I
:
4347 rel
->r_info
= ELFNN_R_INFO (ELFNN_R_SYM (rel
->r_info
), R_RISCV_TPREL_I
);
4350 case R_RISCV_TPREL_LO12_S
:
4351 rel
->r_info
= ELFNN_R_INFO (ELFNN_R_SYM (rel
->r_info
), R_RISCV_TPREL_S
);
4354 case R_RISCV_TPREL_HI20
:
4355 case R_RISCV_TPREL_ADD
:
4356 /* We can delete the unnecessary instruction and reloc. */
4357 rel
->r_info
= ELFNN_R_INFO (0, R_RISCV_NONE
);
4359 return riscv_relax_delete_bytes (abfd
, sec
, rel
->r_offset
, 4, link_info
);
4366 /* Implement R_RISCV_ALIGN by deleting excess alignment NOPs. */
4369 _bfd_riscv_relax_align (bfd
*abfd
, asection
*sec
,
4371 struct bfd_link_info
*link_info
,
4372 Elf_Internal_Rela
*rel
,
4374 bfd_vma max_alignment ATTRIBUTE_UNUSED
,
4375 bfd_vma reserve_size ATTRIBUTE_UNUSED
,
4376 bfd_boolean
*again ATTRIBUTE_UNUSED
,
4377 riscv_pcgp_relocs
*pcrel_relocs ATTRIBUTE_UNUSED
,
4378 bfd_boolean undefined_weak ATTRIBUTE_UNUSED
)
4380 bfd_byte
*contents
= elf_section_data (sec
)->this_hdr
.contents
;
4381 bfd_vma alignment
= 1, pos
;
4382 while (alignment
<= rel
->r_addend
)
4385 symval
-= rel
->r_addend
;
4386 bfd_vma aligned_addr
= ((symval
- 1) & ~(alignment
- 1)) + alignment
;
4387 bfd_vma nop_bytes
= aligned_addr
- symval
;
4389 /* Once we've handled an R_RISCV_ALIGN, we can't relax anything else. */
4390 sec
->sec_flg0
= TRUE
;
4392 /* Make sure there are enough NOPs to actually achieve the alignment. */
4393 if (rel
->r_addend
< nop_bytes
)
4396 (_("%pB(%pA+%#" PRIx64
"): %" PRId64
" bytes required for alignment "
4397 "to %" PRId64
"-byte boundary, but only %" PRId64
" present"),
4398 abfd
, sym_sec
, (uint64_t) rel
->r_offset
,
4399 (int64_t) nop_bytes
, (int64_t) alignment
, (int64_t) rel
->r_addend
);
4400 bfd_set_error (bfd_error_bad_value
);
4404 /* Delete the reloc. */
4405 rel
->r_info
= ELFNN_R_INFO (0, R_RISCV_NONE
);
4407 /* If the number of NOPs is already correct, there's nothing to do. */
4408 if (nop_bytes
== rel
->r_addend
)
4411 /* Write as many RISC-V NOPs as we need. */
4412 for (pos
= 0; pos
< (nop_bytes
& -4); pos
+= 4)
4413 bfd_putl32 (RISCV_NOP
, contents
+ rel
->r_offset
+ pos
);
4415 /* Write a final RVC NOP if need be. */
4416 if (nop_bytes
% 4 != 0)
4417 bfd_putl16 (RVC_NOP
, contents
+ rel
->r_offset
+ pos
);
4419 /* Delete the excess bytes. */
4420 return riscv_relax_delete_bytes (abfd
, sec
, rel
->r_offset
+ nop_bytes
,
4421 rel
->r_addend
- nop_bytes
, link_info
);
4424 /* Relax PC-relative references to GP-relative references. */
4427 _bfd_riscv_relax_pc (bfd
*abfd ATTRIBUTE_UNUSED
,
4430 struct bfd_link_info
*link_info
,
4431 Elf_Internal_Rela
*rel
,
4433 bfd_vma max_alignment
,
4434 bfd_vma reserve_size
,
4435 bfd_boolean
*again ATTRIBUTE_UNUSED
,
4436 riscv_pcgp_relocs
*pcgp_relocs
,
4437 bfd_boolean undefined_weak
)
4439 bfd_byte
*contents
= elf_section_data (sec
)->this_hdr
.contents
;
4440 bfd_vma gp
= riscv_global_pointer_value (link_info
);
4442 BFD_ASSERT (rel
->r_offset
+ 4 <= sec
->size
);
4444 /* Chain the _LO relocs to their cooresponding _HI reloc to compute the
4445 actual target address. */
4446 riscv_pcgp_hi_reloc hi_reloc
;
4447 memset (&hi_reloc
, 0, sizeof (hi_reloc
));
4448 switch (ELFNN_R_TYPE (rel
->r_info
))
4450 case R_RISCV_PCREL_LO12_I
:
4451 case R_RISCV_PCREL_LO12_S
:
4453 /* If the %lo has an addend, it isn't for the label pointing at the
4454 hi part instruction, but rather for the symbol pointed at by the
4455 hi part instruction. So we must subtract it here for the lookup.
4456 It is still used below in the final symbol address. */
4457 bfd_vma hi_sec_off
= symval
- sec_addr (sym_sec
) - rel
->r_addend
;
4458 riscv_pcgp_hi_reloc
*hi
= riscv_find_pcgp_hi_reloc (pcgp_relocs
,
4462 riscv_record_pcgp_lo_reloc (pcgp_relocs
, hi_sec_off
);
4467 symval
= hi_reloc
.hi_addr
;
4468 sym_sec
= hi_reloc
.sym_sec
;
4470 /* We can not know whether the undefined weak symbol is referenced
4471 according to the information of R_RISCV_PCREL_LO12_I/S. Therefore,
4472 we have to record the 'undefined_weak' flag when handling the
4473 corresponding R_RISCV_HI20 reloc in riscv_record_pcgp_hi_reloc. */
4474 undefined_weak
= hi_reloc
.undefined_weak
;
4478 case R_RISCV_PCREL_HI20
:
4479 /* Mergeable symbols and code might later move out of range. */
4480 if (! undefined_weak
4481 && sym_sec
->flags
& (SEC_MERGE
| SEC_CODE
))
4484 /* If the cooresponding lo relocation has already been seen then it's not
4485 safe to relax this relocation. */
4486 if (riscv_find_pcgp_lo_reloc (pcgp_relocs
, rel
->r_offset
))
4497 /* If gp and the symbol are in the same output section, which is not the
4498 abs section, then consider only that output section's alignment. */
4499 struct bfd_link_hash_entry
*h
=
4500 bfd_link_hash_lookup (link_info
->hash
, RISCV_GP_SYMBOL
, FALSE
, FALSE
,
4502 if (h
->u
.def
.section
->output_section
== sym_sec
->output_section
4503 && sym_sec
->output_section
!= bfd_abs_section_ptr
)
4504 max_alignment
= (bfd_vma
) 1 << sym_sec
->output_section
->alignment_power
;
4507 /* Is the reference in range of x0 or gp?
4508 Valid gp range conservatively because of alignment issue. */
4510 || (VALID_ITYPE_IMM (symval
)
4512 && VALID_ITYPE_IMM (symval
- gp
+ max_alignment
+ reserve_size
))
4514 && VALID_ITYPE_IMM (symval
- gp
- max_alignment
- reserve_size
))))
4516 unsigned sym
= hi_reloc
.hi_sym
;
4517 switch (ELFNN_R_TYPE (rel
->r_info
))
4519 case R_RISCV_PCREL_LO12_I
:
4522 /* Change the RS1 to zero, and then modify the relocation
4523 type to R_RISCV_LO12_I. */
4524 bfd_vma insn
= bfd_getl32 (contents
+ rel
->r_offset
);
4525 insn
&= ~(OP_MASK_RS1
<< OP_SH_RS1
);
4526 bfd_putl32 (insn
, contents
+ rel
->r_offset
);
4527 rel
->r_info
= ELFNN_R_INFO (sym
, R_RISCV_LO12_I
);
4528 rel
->r_addend
= hi_reloc
.hi_addend
;
4532 rel
->r_info
= ELFNN_R_INFO (sym
, R_RISCV_GPREL_I
);
4533 rel
->r_addend
+= hi_reloc
.hi_addend
;
4537 case R_RISCV_PCREL_LO12_S
:
4540 /* Change the RS1 to zero, and then modify the relocation
4541 type to R_RISCV_LO12_S. */
4542 bfd_vma insn
= bfd_getl32 (contents
+ rel
->r_offset
);
4543 insn
&= ~(OP_MASK_RS1
<< OP_SH_RS1
);
4544 bfd_putl32 (insn
, contents
+ rel
->r_offset
);
4545 rel
->r_info
= ELFNN_R_INFO (sym
, R_RISCV_LO12_S
);
4546 rel
->r_addend
= hi_reloc
.hi_addend
;
4550 rel
->r_info
= ELFNN_R_INFO (sym
, R_RISCV_GPREL_S
);
4551 rel
->r_addend
+= hi_reloc
.hi_addend
;
4555 case R_RISCV_PCREL_HI20
:
4556 riscv_record_pcgp_hi_reloc (pcgp_relocs
,
4560 ELFNN_R_SYM(rel
->r_info
),
4563 /* We can delete the unnecessary AUIPC and reloc. */
4564 rel
->r_info
= ELFNN_R_INFO (0, R_RISCV_DELETE
);
4576 /* Delete the bytes for R_RISCV_DELETE. */
4579 _bfd_riscv_relax_delete (bfd
*abfd
,
4581 asection
*sym_sec ATTRIBUTE_UNUSED
,
4582 struct bfd_link_info
*link_info
,
4583 Elf_Internal_Rela
*rel
,
4584 bfd_vma symval ATTRIBUTE_UNUSED
,
4585 bfd_vma max_alignment ATTRIBUTE_UNUSED
,
4586 bfd_vma reserve_size ATTRIBUTE_UNUSED
,
4587 bfd_boolean
*again ATTRIBUTE_UNUSED
,
4588 riscv_pcgp_relocs
*pcgp_relocs ATTRIBUTE_UNUSED
,
4589 bfd_boolean undefined_weak ATTRIBUTE_UNUSED
)
4591 if (!riscv_relax_delete_bytes(abfd
, sec
, rel
->r_offset
, rel
->r_addend
,
4594 rel
->r_info
= ELFNN_R_INFO(0, R_RISCV_NONE
);
4600 Pass 0: Shortens code sequences for LUI/CALL/TPREL relocs.
4601 Pass 1: Shortens code sequences for PCREL relocs.
4602 Pass 2: Deletes the bytes that pass 1 made obselete.
4603 Pass 3: Which cannot be disabled, handles code alignment directives. */
4606 _bfd_riscv_relax_section (bfd
*abfd
, asection
*sec
,
4607 struct bfd_link_info
*info
,
4610 Elf_Internal_Shdr
*symtab_hdr
= &elf_symtab_hdr (abfd
);
4611 struct riscv_elf_link_hash_table
*htab
= riscv_elf_hash_table (info
);
4612 struct bfd_elf_section_data
*data
= elf_section_data (sec
);
4613 Elf_Internal_Rela
*relocs
;
4614 bfd_boolean ret
= FALSE
;
4616 bfd_vma max_alignment
, reserve_size
= 0;
4617 riscv_pcgp_relocs pcgp_relocs
;
4621 if (bfd_link_relocatable (info
)
4623 || (sec
->flags
& SEC_RELOC
) == 0
4624 || sec
->reloc_count
== 0
4625 || (info
->disable_target_specific_optimizations
4626 && info
->relax_pass
< 2))
4629 riscv_init_pcgp_relocs (&pcgp_relocs
);
4631 /* Read this BFD's relocs if we haven't done so already. */
4633 relocs
= data
->relocs
;
4634 else if (!(relocs
= _bfd_elf_link_read_relocs (abfd
, sec
, NULL
, NULL
,
4635 info
->keep_memory
)))
4640 max_alignment
= htab
->max_alignment
;
4641 if (max_alignment
== (bfd_vma
) -1)
4643 max_alignment
= _bfd_riscv_get_max_alignment (sec
);
4644 htab
->max_alignment
= max_alignment
;
4648 max_alignment
= _bfd_riscv_get_max_alignment (sec
);
4650 /* Examine and consider relaxing each reloc. */
4651 for (i
= 0; i
< sec
->reloc_count
; i
++)
4654 Elf_Internal_Rela
*rel
= relocs
+ i
;
4655 relax_func_t relax_func
;
4656 int type
= ELFNN_R_TYPE (rel
->r_info
);
4659 bfd_boolean undefined_weak
= FALSE
;
4662 if (info
->relax_pass
== 0)
4664 if (type
== R_RISCV_CALL
4665 || type
== R_RISCV_CALL_PLT
)
4666 relax_func
= _bfd_riscv_relax_call
;
4667 else if (type
== R_RISCV_HI20
4668 || type
== R_RISCV_LO12_I
4669 || type
== R_RISCV_LO12_S
)
4670 relax_func
= _bfd_riscv_relax_lui
;
4671 else if (type
== R_RISCV_TPREL_HI20
4672 || type
== R_RISCV_TPREL_ADD
4673 || type
== R_RISCV_TPREL_LO12_I
4674 || type
== R_RISCV_TPREL_LO12_S
)
4675 relax_func
= _bfd_riscv_relax_tls_le
;
4679 else if (info
->relax_pass
== 1
4680 && !bfd_link_pic(info
)
4681 && (type
== R_RISCV_PCREL_HI20
4682 || type
== R_RISCV_PCREL_LO12_I
4683 || type
== R_RISCV_PCREL_LO12_S
))
4684 relax_func
= _bfd_riscv_relax_pc
;
4685 else if (info
->relax_pass
== 2 && type
== R_RISCV_DELETE
)
4686 relax_func
= _bfd_riscv_relax_delete
;
4687 else if (info
->relax_pass
== 3 && type
== R_RISCV_ALIGN
)
4688 relax_func
= _bfd_riscv_relax_align
;
4692 if (info
->relax_pass
< 2)
4694 /* Only relax this reloc if it is paired with R_RISCV_RELAX. */
4695 if (i
== sec
->reloc_count
- 1
4696 || ELFNN_R_TYPE ((rel
+ 1)->r_info
) != R_RISCV_RELAX
4697 || rel
->r_offset
!= (rel
+ 1)->r_offset
)
4700 /* Skip over the R_RISCV_RELAX. */
4704 data
->relocs
= relocs
;
4706 /* Read this BFD's contents if we haven't done so already. */
4707 if (!data
->this_hdr
.contents
4708 && !bfd_malloc_and_get_section (abfd
, sec
, &data
->this_hdr
.contents
))
4711 /* Read this BFD's symbols if we haven't done so already. */
4712 if (symtab_hdr
->sh_info
!= 0
4713 && !symtab_hdr
->contents
4714 && !(symtab_hdr
->contents
=
4715 (unsigned char *) bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
4716 symtab_hdr
->sh_info
,
4717 0, NULL
, NULL
, NULL
)))
4720 /* Get the value of the symbol referred to by the reloc. */
4721 if (ELFNN_R_SYM (rel
->r_info
) < symtab_hdr
->sh_info
)
4723 /* A local symbol. */
4724 Elf_Internal_Sym
*isym
= ((Elf_Internal_Sym
*) symtab_hdr
->contents
4725 + ELFNN_R_SYM (rel
->r_info
));
4726 reserve_size
= (isym
->st_size
- rel
->r_addend
) > isym
->st_size
4727 ? 0 : isym
->st_size
- rel
->r_addend
;
4729 /* Relocate against local STT_GNU_IFUNC symbol. we have created
4730 a fake global symbol entry for this, so deal with the local ifunc
4732 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
4735 if (isym
->st_shndx
== SHN_UNDEF
)
4736 sym_sec
= sec
, symval
= rel
->r_offset
;
4739 BFD_ASSERT (isym
->st_shndx
< elf_numsections (abfd
));
4740 sym_sec
= elf_elfsections (abfd
)[isym
->st_shndx
]->bfd_section
;
4742 /* The purpose of this code is unknown. It breaks linker scripts
4743 for embedded development that place sections at address zero.
4744 This code is believed to be unnecessary. Disabling it but not
4745 yet removing it, in case something breaks. */
4746 if (sec_addr (sym_sec
) == 0)
4749 symval
= isym
->st_value
;
4751 symtype
= ELF_ST_TYPE (isym
->st_info
);
4756 struct elf_link_hash_entry
*h
;
4758 indx
= ELFNN_R_SYM (rel
->r_info
) - symtab_hdr
->sh_info
;
4759 h
= elf_sym_hashes (abfd
)[indx
];
4761 while (h
->root
.type
== bfd_link_hash_indirect
4762 || h
->root
.type
== bfd_link_hash_warning
)
4763 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
4765 /* Disable the relaxation for ifunc. */
4766 if (h
!= NULL
&& h
->type
== STT_GNU_IFUNC
)
4769 if (h
->root
.type
== bfd_link_hash_undefweak
4770 && (relax_func
== _bfd_riscv_relax_lui
4771 || relax_func
== _bfd_riscv_relax_pc
))
4773 /* For the lui and auipc relaxations, since the symbol
4774 value of an undefined weak symbol is always be zero,
4775 we can optimize the patterns into a single LI/MV/ADDI
4778 Note that, creating shared libraries and pie output may
4779 break the rule above. Fortunately, since we do not relax
4780 pc relocs when creating shared libraries and pie output,
4781 and the absolute address access for R_RISCV_HI20 isn't
4782 allowed when "-fPIC" is set, the problem of creating shared
4783 libraries can not happen currently. Once we support the
4784 auipc relaxations when creating shared libraries, then we will
4785 need the more rigorous checking for this optimization. */
4786 undefined_weak
= TRUE
;
4789 /* This line has to match the check in riscv_elf_relocate_section
4790 in the R_RISCV_CALL[_PLT] case. */
4791 if (bfd_link_pic (info
) && h
->plt
.offset
!= MINUS_ONE
)
4793 sym_sec
= htab
->elf
.splt
;
4794 symval
= h
->plt
.offset
;
4796 else if (undefined_weak
)
4799 sym_sec
= bfd_und_section_ptr
;
4801 else if ((h
->root
.type
== bfd_link_hash_defined
4802 || h
->root
.type
== bfd_link_hash_defweak
)
4803 && h
->root
.u
.def
.section
!= NULL
4804 && h
->root
.u
.def
.section
->output_section
!= NULL
)
4806 symval
= h
->root
.u
.def
.value
;
4807 sym_sec
= h
->root
.u
.def
.section
;
4812 if (h
->type
!= STT_FUNC
)
4814 (h
->size
- rel
->r_addend
) > h
->size
? 0 : h
->size
- rel
->r_addend
;
4818 if (sym_sec
->sec_info_type
== SEC_INFO_TYPE_MERGE
4819 && (sym_sec
->flags
& SEC_MERGE
))
4821 /* At this stage in linking, no SEC_MERGE symbol has been
4822 adjusted, so all references to such symbols need to be
4823 passed through _bfd_merged_section_offset. (Later, in
4824 relocate_section, all SEC_MERGE symbols *except* for
4825 section symbols have been adjusted.)
4827 gas may reduce relocations against symbols in SEC_MERGE
4828 sections to a relocation against the section symbol when
4829 the original addend was zero. When the reloc is against
4830 a section symbol we should include the addend in the
4831 offset passed to _bfd_merged_section_offset, since the
4832 location of interest is the original symbol. On the
4833 other hand, an access to "sym+addend" where "sym" is not
4834 a section symbol should not include the addend; Such an
4835 access is presumed to be an offset from "sym"; The
4836 location of interest is just "sym". */
4837 if (symtype
== STT_SECTION
)
4838 symval
+= rel
->r_addend
;
4840 symval
= _bfd_merged_section_offset (abfd
, &sym_sec
,
4841 elf_section_data (sym_sec
)->sec_info
,
4844 if (symtype
!= STT_SECTION
)
4845 symval
+= rel
->r_addend
;
4848 symval
+= rel
->r_addend
;
4850 symval
+= sec_addr (sym_sec
);
4852 if (!relax_func (abfd
, sec
, sym_sec
, info
, rel
, symval
,
4853 max_alignment
, reserve_size
, again
,
4854 &pcgp_relocs
, undefined_weak
))
4861 if (relocs
!= data
->relocs
)
4863 riscv_free_pcgp_relocs(&pcgp_relocs
, abfd
, sec
);
4869 # define PRSTATUS_SIZE 204
4870 # define PRSTATUS_OFFSET_PR_CURSIG 12
4871 # define PRSTATUS_OFFSET_PR_PID 24
4872 # define PRSTATUS_OFFSET_PR_REG 72
4873 # define ELF_GREGSET_T_SIZE 128
4874 # define PRPSINFO_SIZE 128
4875 # define PRPSINFO_OFFSET_PR_PID 16
4876 # define PRPSINFO_OFFSET_PR_FNAME 32
4877 # define PRPSINFO_OFFSET_PR_PSARGS 48
4879 # define PRSTATUS_SIZE 376
4880 # define PRSTATUS_OFFSET_PR_CURSIG 12
4881 # define PRSTATUS_OFFSET_PR_PID 32
4882 # define PRSTATUS_OFFSET_PR_REG 112
4883 # define ELF_GREGSET_T_SIZE 256
4884 # define PRPSINFO_SIZE 136
4885 # define PRPSINFO_OFFSET_PR_PID 24
4886 # define PRPSINFO_OFFSET_PR_FNAME 40
4887 # define PRPSINFO_OFFSET_PR_PSARGS 56
4890 /* Support for core dump NOTE sections. */
4893 riscv_elf_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
4895 switch (note
->descsz
)
4900 case PRSTATUS_SIZE
: /* sizeof(struct elf_prstatus) on Linux/RISC-V. */
4902 elf_tdata (abfd
)->core
->signal
4903 = bfd_get_16 (abfd
, note
->descdata
+ PRSTATUS_OFFSET_PR_CURSIG
);
4906 elf_tdata (abfd
)->core
->lwpid
4907 = bfd_get_32 (abfd
, note
->descdata
+ PRSTATUS_OFFSET_PR_PID
);
4911 /* Make a ".reg/999" section. */
4912 return _bfd_elfcore_make_pseudosection (abfd
, ".reg", ELF_GREGSET_T_SIZE
,
4913 note
->descpos
+ PRSTATUS_OFFSET_PR_REG
);
4917 riscv_elf_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
4919 switch (note
->descsz
)
4924 case PRPSINFO_SIZE
: /* sizeof(struct elf_prpsinfo) on Linux/RISC-V. */
4926 elf_tdata (abfd
)->core
->pid
4927 = bfd_get_32 (abfd
, note
->descdata
+ PRPSINFO_OFFSET_PR_PID
);
4930 elf_tdata (abfd
)->core
->program
= _bfd_elfcore_strndup
4931 (abfd
, note
->descdata
+ PRPSINFO_OFFSET_PR_FNAME
, 16);
4934 elf_tdata (abfd
)->core
->command
= _bfd_elfcore_strndup
4935 (abfd
, note
->descdata
+ PRPSINFO_OFFSET_PR_PSARGS
, 80);
4939 /* Note that for some reason, a spurious space is tacked
4940 onto the end of the args in some (at least one anyway)
4941 implementations, so strip it off if it exists. */
4944 char *command
= elf_tdata (abfd
)->core
->command
;
4945 int n
= strlen (command
);
4947 if (0 < n
&& command
[n
- 1] == ' ')
4948 command
[n
- 1] = '\0';
4954 /* Set the right mach type. */
4957 riscv_elf_object_p (bfd
*abfd
)
4959 /* There are only two mach types in RISCV currently. */
4960 if (strcmp (abfd
->xvec
->name
, "elf32-littleriscv") == 0
4961 || strcmp (abfd
->xvec
->name
, "elf32-bigriscv") == 0)
4962 bfd_default_set_arch_mach (abfd
, bfd_arch_riscv
, bfd_mach_riscv32
);
4964 bfd_default_set_arch_mach (abfd
, bfd_arch_riscv
, bfd_mach_riscv64
);
4969 /* Determine whether an object attribute tag takes an integer, a
4973 riscv_elf_obj_attrs_arg_type (int tag
)
4975 return (tag
& 1) != 0 ? ATTR_TYPE_FLAG_STR_VAL
: ATTR_TYPE_FLAG_INT_VAL
;
4978 #define TARGET_LITTLE_SYM riscv_elfNN_vec
4979 #define TARGET_LITTLE_NAME "elfNN-littleriscv"
4980 #define TARGET_BIG_SYM riscv_elfNN_be_vec
4981 #define TARGET_BIG_NAME "elfNN-bigriscv"
4983 #define elf_backend_reloc_type_class riscv_reloc_type_class
4985 #define bfd_elfNN_bfd_reloc_name_lookup riscv_reloc_name_lookup
4986 #define bfd_elfNN_bfd_link_hash_table_create riscv_elf_link_hash_table_create
4987 #define bfd_elfNN_bfd_reloc_type_lookup riscv_reloc_type_lookup
4988 #define bfd_elfNN_bfd_merge_private_bfd_data \
4989 _bfd_riscv_elf_merge_private_bfd_data
4991 #define elf_backend_copy_indirect_symbol riscv_elf_copy_indirect_symbol
4992 #define elf_backend_create_dynamic_sections riscv_elf_create_dynamic_sections
4993 #define elf_backend_check_relocs riscv_elf_check_relocs
4994 #define elf_backend_adjust_dynamic_symbol riscv_elf_adjust_dynamic_symbol
4995 #define elf_backend_size_dynamic_sections riscv_elf_size_dynamic_sections
4996 #define elf_backend_relocate_section riscv_elf_relocate_section
4997 #define elf_backend_finish_dynamic_symbol riscv_elf_finish_dynamic_symbol
4998 #define elf_backend_finish_dynamic_sections riscv_elf_finish_dynamic_sections
4999 #define elf_backend_gc_mark_hook riscv_elf_gc_mark_hook
5000 #define elf_backend_plt_sym_val riscv_elf_plt_sym_val
5001 #define elf_backend_grok_prstatus riscv_elf_grok_prstatus
5002 #define elf_backend_grok_psinfo riscv_elf_grok_psinfo
5003 #define elf_backend_object_p riscv_elf_object_p
5004 #define elf_info_to_howto_rel NULL
5005 #define elf_info_to_howto riscv_info_to_howto_rela
5006 #define bfd_elfNN_bfd_relax_section _bfd_riscv_relax_section
5007 #define bfd_elfNN_mkobject elfNN_riscv_mkobject
5009 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
5011 #define elf_backend_can_gc_sections 1
5012 #define elf_backend_can_refcount 1
5013 #define elf_backend_want_got_plt 1
5014 #define elf_backend_plt_readonly 1
5015 #define elf_backend_plt_alignment 4
5016 #define elf_backend_want_plt_sym 1
5017 #define elf_backend_got_header_size (ARCH_SIZE / 8)
5018 #define elf_backend_want_dynrelro 1
5019 #define elf_backend_rela_normal 1
5020 #define elf_backend_default_execstack 0
5022 #undef elf_backend_obj_attrs_vendor
5023 #define elf_backend_obj_attrs_vendor "riscv"
5024 #undef elf_backend_obj_attrs_arg_type
5025 #define elf_backend_obj_attrs_arg_type riscv_elf_obj_attrs_arg_type
5026 #undef elf_backend_obj_attrs_section_type
5027 #define elf_backend_obj_attrs_section_type SHT_RISCV_ATTRIBUTES
5028 #undef elf_backend_obj_attrs_section
5029 #define elf_backend_obj_attrs_section ".riscv.attributes"
5031 #include "elfNN-target.h"