1 /* ARC-specific support for 32-bit ELF
2 Copyright (C) 1994-2016 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
27 #include "libiberty.h"
28 #include "opcode/arc-func.h"
30 #define ARC_DEBUG(...)
31 #define DEBUG(...) printf (__ARGV__)
32 #define DEBUG_ARC_RELOC(A)
36 bfd_vma sdata_begin_symbol_vma;
37 asection * sdata_output_section;
38 bfd_vma got_symbol_vma;
41 struct arc_local_data global_arc_data =
43 .sdata_begin_symbol_vma = 0,
44 .sdata_output_section = NULL,
48 struct dynamic_sections
50 bfd_boolean initialized;
59 static struct dynamic_sections
60 arc_create_dynamic_sections (bfd * abfd, struct bfd_link_info *info);
62 enum dyn_section_types
73 const char * dyn_section_names[DYN_SECTION_TYPES_END] =
83 /* The default symbols representing the init and fini dyn values.
84 TODO: Check what is the relation of those strings with arclinux.em
86 #define INIT_SYM_STRING "_init"
87 #define FINI_SYM_STRING "_fini"
89 char * init_str = INIT_SYM_STRING;
90 char * fini_str = FINI_SYM_STRING;
93 #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \
98 static ATTRIBUTE_UNUSED const char *
99 reloc_type_to_name (unsigned int type)
103 #include "elf/arc-reloc.def"
110 #undef ARC_RELOC_HOWTO
112 /* Try to minimize the amount of space occupied by relocation tables
113 on the ROM (not that the ROM won't be swamped by other ELF overhead). */
117 static ATTRIBUTE_UNUSED bfd_boolean
118 is_reloc_PC_relative (reloc_howto_type *howto)
120 return (strstr (howto->name, "PC") != NULL) ? TRUE : FALSE;
124 is_reloc_SDA_relative (reloc_howto_type *howto)
126 return (strstr (howto->name, "SDA") != NULL) ? TRUE : FALSE;
130 is_reloc_for_GOT (reloc_howto_type * howto)
132 return (strstr (howto->name, "GOT") != NULL) ? TRUE : FALSE;
136 is_reloc_for_PLT (reloc_howto_type * howto)
138 return (strstr (howto->name, "PLT") != NULL) ? TRUE : FALSE;
141 #define arc_bfd_get_8(A,B,C) bfd_get_8(A,B)
142 #define arc_bfd_get_16(A,B,C) bfd_get_16(A,B)
143 #define arc_bfd_put_8(A,B,C,D) bfd_put_8(A,B,C)
144 #define arc_bfd_put_16(A,B,C,D) bfd_put_16(A,B,C)
147 arc_bfd_get_32 (bfd * abfd, void *loc, asection * input_section)
149 long insn = bfd_get_32 (abfd, loc);
151 if (!bfd_big_endian (abfd)
153 && (input_section->flags & SEC_CODE))
154 insn = ((0x0000fffff & insn) << 16) | ((0xffff0000 & insn) >> 16);
160 arc_bfd_put_32 (bfd * abfd, long insn, void *loc, asection * input_section)
162 if (!bfd_big_endian (abfd)
164 && (input_section->flags & SEC_CODE))
165 insn = ((0x0000fffff & insn) << 16) | ((0xffff0000 & insn) >> 16);
167 bfd_put_32 (abfd, insn, loc);
170 static bfd_reloc_status_type
171 arc_elf_reloc (bfd *abfd ATTRIBUTE_UNUSED,
172 arelent *reloc_entry,
174 void *data ATTRIBUTE_UNUSED,
175 asection *input_section,
177 char ** error_message ATTRIBUTE_UNUSED)
179 if (output_bfd != NULL)
181 reloc_entry->address += input_section->output_offset;
183 /* In case of relocateable link and if the reloc is against a
184 section symbol, the addend needs to be adjusted according to
185 where the section symbol winds up in the output section. */
186 if ((symbol_in->flags & BSF_SECTION_SYM) && symbol_in->section)
187 reloc_entry->addend += symbol_in->section->output_offset;
192 return bfd_reloc_continue;
196 #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \
200 #include "elf/arc-reloc.def"
203 #undef ARC_RELOC_HOWTO
205 #define ARC_RELOC_HOWTO(TYPE, VALUE, RSIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \
206 [TYPE] = HOWTO (R_##TYPE, 0, RSIZE, BITSIZE, FALSE, 0, complain_overflow_##OVERFLOW, arc_elf_reloc, "R_" #TYPE, FALSE, 0, 0, FALSE),
208 static struct reloc_howto_struct elf_arc_howto_table[] =
210 #include "elf/arc-reloc.def"
211 /* Example of what is generated by the preprocessor. Currently kept as an example.
212 HOWTO (R_ARC_NONE, // Type.
214 2, // Size (0 = byte, 1 = short, 2 = long).
216 FALSE, // PC_relative.
218 complain_overflow_bitfield, // Complain_on_overflow.
219 bfd_elf_generic_reloc, // Special_function.
220 "R_ARC_NONE", // Name.
221 TRUE, // Partial_inplace.
224 FALSE), // PCrel_offset.
227 #undef ARC_RELOC_HOWTO
229 static void arc_elf_howto_init (void)
231 #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \
232 elf_arc_howto_table[TYPE].pc_relative = \
233 (strstr (#FORMULA, " P ") != NULL || strstr (#FORMULA, " PDATA ") != NULL); \
234 elf_arc_howto_table[TYPE].dst_mask = RELOC_FUNCTION(0, ~0);
236 #include "elf/arc-reloc.def"
238 #undef ARC_RELOC_HOWTO
241 #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \
243 const int howto_table_lookup[] =
245 #include "elf/arc-reloc.def"
247 #undef ARC_RELOC_HOWTO
249 static reloc_howto_type *
250 arc_elf_howto (unsigned int r_type)
252 if (elf_arc_howto_table[R_ARC_32].dst_mask == 0)
253 arc_elf_howto_init ();
254 return &elf_arc_howto_table[r_type];
257 /* Map BFD reloc types to ARC ELF reloc types. */
261 bfd_reloc_code_real_type bfd_reloc_val;
262 unsigned char elf_reloc_val;
265 #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \
266 { BFD_RELOC_##TYPE, R_##TYPE },
267 static const struct arc_reloc_map arc_reloc_map[] =
269 #include "elf/arc-reloc.def"
270 {BFD_RELOC_NONE, R_ARC_NONE},
271 {BFD_RELOC_8, R_ARC_8},
272 {BFD_RELOC_16, R_ARC_16},
273 {BFD_RELOC_24, R_ARC_24},
274 {BFD_RELOC_32, R_ARC_32},
276 #undef ARC_RELOC_HOWTO
278 static reloc_howto_type *
279 bfd_elf32_bfd_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
280 bfd_reloc_code_real_type code)
284 for (i = ARRAY_SIZE (arc_reloc_map); i--;)
286 if (arc_reloc_map[i].bfd_reloc_val == code)
287 return arc_elf_howto (arc_reloc_map[i].elf_reloc_val);
293 static reloc_howto_type *
294 bfd_elf32_bfd_reloc_name_lookup (bfd * abfd ATTRIBUTE_UNUSED, const char *r_name)
298 for (i = 0; i < ARRAY_SIZE (elf_arc_howto_table); i++)
299 if (elf_arc_howto_table[i].name != NULL
300 && strcasecmp (elf_arc_howto_table[i].name, r_name) == 0)
301 return arc_elf_howto (i);
307 /* Set the howto pointer for an ARC ELF reloc. */
309 arc_info_to_howto_rel (bfd * abfd ATTRIBUTE_UNUSED,
311 Elf_Internal_Rela * dst)
315 r_type = ELF32_R_TYPE (dst->r_info);
316 BFD_ASSERT (r_type < (unsigned int) R_ARC_max);
317 cache_ptr->howto = arc_elf_howto (r_type);
320 /* Set the right machine number for an ARC ELF file. */
322 arc_elf_object_p (bfd * abfd)
324 /* Make sure this is initialised, or you'll have the potential of passing
325 garbage---or misleading values---into the call to
326 bfd_default_set_arch_mach (). */
327 int mach = bfd_mach_arc_arc700;
328 unsigned long arch = elf_elfheader (abfd)->e_flags & EF_ARC_MACH_MSK;
329 unsigned e_machine = elf_elfheader (abfd)->e_machine;
331 if (e_machine == EM_ARC_COMPACT || e_machine == EM_ARC_COMPACT2)
335 case E_ARC_MACH_ARC600:
336 mach = bfd_mach_arc_arc600;
338 case E_ARC_MACH_ARC601:
339 mach = bfd_mach_arc_arc601;
341 case E_ARC_MACH_ARC700:
342 mach = bfd_mach_arc_arc700;
344 case EF_ARC_CPU_ARCV2HS:
345 case EF_ARC_CPU_ARCV2EM:
346 mach = bfd_mach_arc_arcv2;
349 mach = (e_machine == EM_ARC_COMPACT) ?
350 bfd_mach_arc_arc700 : bfd_mach_arc_arcv2;
356 if (e_machine == EM_ARC)
358 (*_bfd_error_handler)
359 (_("Error: The ARC4 architecture is no longer supported.\n"));
364 (*_bfd_error_handler)
365 (_("Warning: unset or old architecture flags. \n"
366 " Use default machine.\n"));
370 return bfd_default_set_arch_mach (abfd, bfd_arch_arc, mach);
373 /* The final processing done just before writing out an ARC ELF object file.
374 This gets the ARC architecture right based on the machine number. */
377 arc_elf_final_write_processing (bfd * abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
382 switch (bfd_get_mach (abfd))
384 case bfd_mach_arc_arc600:
385 val = E_ARC_MACH_ARC600;
386 emf = EM_ARC_COMPACT;
388 case bfd_mach_arc_arc601:
389 val = E_ARC_MACH_ARC601;
390 emf = EM_ARC_COMPACT;
392 case bfd_mach_arc_arc700:
393 val = E_ARC_MACH_ARC700;
394 emf = EM_ARC_COMPACT;
396 case bfd_mach_arc_arcv2:
397 val = EF_ARC_CPU_GENERIC;
398 emf = EM_ARC_COMPACT2;
399 /* TODO: Check validity of this. It can also be ARCV2EM here.
400 Previous version sets the e_machine here. */
405 elf_elfheader (abfd)->e_flags &= ~EF_ARC_MACH;
406 elf_elfheader (abfd)->e_flags |= val;
407 elf_elfheader (abfd)->e_machine = emf;
409 /* Record whatever is the current syscall ABI version. */
410 elf_elfheader (abfd)->e_flags |= E_ARC_OSABI_CURRENT;
413 #define BFD_DEBUG_PIC(...)
415 struct arc_relocation_data
417 bfd_vma reloc_offset;
418 bfd_vma reloc_addend;
419 bfd_vma got_offset_value;
422 asection * sym_section;
424 reloc_howto_type *howto;
426 asection * input_section;
428 bfd_vma sdata_begin_symbol_vma;
429 bfd_boolean sdata_begin_symbol_vma_set;
430 bfd_vma got_symbol_vma;
432 bfd_boolean should_relocate;
436 debug_arc_reloc (struct arc_relocation_data reloc_data)
438 fprintf (stderr, "Reloc type=%s, should_relocate = %s\n",
439 reloc_data.howto->name,
440 reloc_data.should_relocate ? "true" : "false");
441 fprintf (stderr, " offset = 0x%x, addend = 0x%x\n",
442 (unsigned int) reloc_data.reloc_offset,
443 (unsigned int) reloc_data.reloc_addend);
444 fprintf (stderr, " Symbol:\n");
445 fprintf (stderr, " value = 0x%08x\n",
446 (unsigned int) reloc_data.sym_value);
447 if (reloc_data.sym_section != NULL)
449 fprintf (stderr, "IN IF\n");
451 " section name = %s, output_offset 0x%08x, output_section->vma = 0x%08x\n",
452 reloc_data.sym_section->name,
453 (unsigned int) reloc_data.sym_section->output_offset,
454 (unsigned int) reloc_data.sym_section->output_section->vma);
457 fprintf (stderr, " symbol section is NULL\n");
459 fprintf (stderr, " Input_section:\n");
460 if (reloc_data.input_section != NULL)
463 " section name = %s, output_offset 0x%08x, output_section->vma = 0x%08x\n",
464 reloc_data.input_section->name,
465 (unsigned int) reloc_data.input_section->output_offset,
466 (unsigned int) reloc_data.input_section->output_section->vma);
467 fprintf (stderr, " changed_address = 0x%08x\n",
468 (unsigned int) (reloc_data.input_section->output_section->vma +
469 reloc_data.input_section->output_offset +
470 reloc_data.reloc_offset));
473 fprintf (stderr, " input section is NULL\n");
476 static ATTRIBUTE_UNUSED bfd_vma
477 get_middle_endian_relocation (bfd_vma reloc)
480 ((reloc & 0xffff0000) >> 16) |
481 ((reloc & 0xffff) << 16);
485 #define ME(RELOC) (get_middle_endian_reloction(RELOC))
487 #define S (reloc_data.sym_value \
488 + reloc_data.sym_section->output_offset \
489 + reloc_data.sym_section->output_section->vma)
490 #define A (reloc_data.reloc_addend)
492 #define G (reloc_data.got_offset_value)
493 #define GOT (reloc_data.got_symbol_vma + 12)
494 #define L (reloc_data.sym_value \
495 + reloc_data.sym_section->output_section->vma \
496 + reloc_data.sym_section->output_offset)
498 /* P: relative offset to PCL The offset should be to the current location
499 aligned to 32 bits. */
501 (reloc_data.input_section->output_section->vma \
502 + reloc_data.input_section->output_offset \
503 + (reloc_data.reloc_offset - (bitsize >= 32 ? 4 : 0)) \
506 (reloc_data.input_section->output_section->vma \
507 + reloc_data.input_section->output_offset \
508 + (reloc_data.reloc_offset) \
510 #define SECTSTAR (reloc_data.input_section->output_offset)
511 #define SECTSTART (reloc_data.input_section->output_offset)
512 #define _SDA_BASE_ (reloc_data.sdata_begin_symbol_vma)
516 #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \
519 bfd_vma bitsize ATTRIBUTE_UNUSED = BITSIZE; \
520 relocation = FORMULA ; \
521 insn = RELOC_FUNCTION (insn, relocation); \
525 static bfd_reloc_status_type
526 arc_do_relocation (bfd_byte * contents, struct arc_relocation_data reloc_data)
528 bfd_vma relocation = 0;
530 bfd_vma orig_insn ATTRIBUTE_UNUSED;
532 if (reloc_data.should_relocate == FALSE)
533 return bfd_reloc_notsupported;
535 switch (reloc_data.howto->size)
538 insn = arc_bfd_get_32 (reloc_data.input_section->owner,
539 contents + reloc_data.reloc_offset,
540 reloc_data.input_section);
544 insn = arc_bfd_get_16 (reloc_data.input_section->owner,
545 contents + reloc_data.reloc_offset,
546 reloc_data.input_section);
556 switch (reloc_data.howto->type)
558 #include "elf/arc-reloc.def"
565 /* Check for relocation overflow. */
566 if (reloc_data.howto->complain_on_overflow != complain_overflow_dont)
568 bfd_reloc_status_type flag;
569 flag = bfd_check_overflow (reloc_data.howto->complain_on_overflow,
570 reloc_data.howto->bitsize,
571 reloc_data.howto->rightshift,
572 bfd_arch_bits_per_address (reloc_data.input_section->owner),
575 #undef DEBUG_ARC_RELOC
576 #define DEBUG_ARC_RELOC(A) debug_arc_reloc (A)
577 if (flag != bfd_reloc_ok)
579 fprintf (stderr, "Relocation overflows !!!!\n");
581 DEBUG_ARC_RELOC (reloc_data);
584 "Relocation value = signed -> %d, unsigned -> %u, hex -> (0x%08x)\n",
586 (unsigned int) relocation,
587 (unsigned int) relocation);
591 #undef DEBUG_ARC_RELOC
592 #define DEBUG_ARC_RELOC(A)
594 switch (reloc_data.howto->size)
597 arc_bfd_put_32 (reloc_data.input_section->owner, insn,
598 contents + reloc_data.reloc_offset,
599 reloc_data.input_section);
603 arc_bfd_put_16 (reloc_data.input_section->owner, insn,
604 contents + reloc_data.reloc_offset,
605 reloc_data.input_section);
608 ARC_DEBUG ("size = %d\n", reloc_data.howto->size);
628 #undef ARC_RELOC_HOWTO
631 arc_get_local_got_offsets (bfd * abfd)
633 static bfd_vma *local_got_offsets = NULL;
635 if (local_got_offsets == NULL)
639 Elf_Internal_Shdr *symtab_hdr = &((elf_tdata (abfd))->symtab_hdr);
641 size = symtab_hdr->sh_info * sizeof (bfd_vma);
642 local_got_offsets = (bfd_vma *) bfd_alloc (abfd, size);
643 if (local_got_offsets == NULL)
645 elf_local_got_offsets (abfd) = local_got_offsets;
646 for (i = 0; i < symtab_hdr->sh_info; i++)
647 local_got_offsets[i] = (bfd_vma) - 1;
650 return local_got_offsets;
654 /* Relocate an arc ELF section.
655 Function : elf_arc_relocate_section
656 Brief : Relocate an arc section, by handling all the relocations
657 appearing in that section.
658 Args : output_bfd : The bfd being written to.
659 info : Link information.
660 input_bfd : The input bfd.
661 input_section : The section being relocated.
662 contents : contents of the section being relocated.
663 relocs : List of relocations in the section.
664 local_syms : is a pointer to the swapped in local symbols.
665 local_section : is an array giving the section in the input file
666 corresponding to the st_shndx field of each
669 elf_arc_relocate_section (bfd * output_bfd,
670 struct bfd_link_info * info,
672 asection * input_section,
674 Elf_Internal_Rela * relocs,
675 Elf_Internal_Sym * local_syms,
676 asection ** local_sections)
678 Elf_Internal_Shdr * symtab_hdr;
679 struct elf_link_hash_entry ** sym_hashes;
680 bfd_vma * local_got_offsets;
681 Elf_Internal_Rela * rel;
682 Elf_Internal_Rela * relend;
684 symtab_hdr = &((elf_tdata (input_bfd))->symtab_hdr);
685 sym_hashes = elf_sym_hashes (input_bfd);
688 relend = relocs + input_section->reloc_count;
689 for (; rel < relend; rel++)
691 enum elf_arc_reloc_type r_type;
692 reloc_howto_type * howto;
693 unsigned long r_symndx;
694 struct elf_link_hash_entry * h;
695 Elf_Internal_Sym * sym;
698 struct arc_relocation_data reloc_data =
700 .reloc_offset = 0, /* bfd_vma reloc_offset; */
701 .reloc_addend = 0, /* bfd_vma reloc_addend; */
702 .got_offset_value = 0, /* bfd_vma got_offset_value; */
703 .sym_value = 0, /* bfd_vma sym_value; */
704 .sym_section = NULL, /* asection *sym_section; */
705 .howto = NULL, /* reloc_howto_type *howto; */
706 .input_section = NULL, /* asection *input_section; */
707 .sdata_begin_symbol_vma = 0, /* bfd_vma sdata_begin_symbol_vma; */
708 .sdata_begin_symbol_vma_set = FALSE, /* bfd_vma sdata_begin_symbol_vma_set; */
709 .got_symbol_vma = 0, /* bfd_vma got_symbol_vma; */
710 .should_relocate = FALSE /* bfd_boolean should_relocate; */
713 struct elf_link_hash_entry *h2;
715 h2 = elf_link_hash_lookup (elf_hash_table (info), "__SDATA_BEGIN__",
718 if (reloc_data.sdata_begin_symbol_vma_set == FALSE
719 && h2 != NULL && h2->root.type != bfd_link_hash_undefined)
721 reloc_data.sdata_begin_symbol_vma =
722 (h2->root.u.def.value +
723 h2->root.u.def.section->output_section->vma);
724 reloc_data.sdata_begin_symbol_vma_set = TRUE;
727 h2 = elf_link_hash_lookup (elf_hash_table (info),
728 "_GLOBAL_OFFSET_TABLE_", FALSE, FALSE,
730 if (h2 != NULL && h2->root.type != bfd_link_hash_undefined)
732 reloc_data.got_symbol_vma =
733 (h2->root.u.def.value +
734 h2->root.u.def.section->output_section->vma);
737 r_type = ELF32_R_TYPE (rel->r_info);
739 if (r_type >= (int) R_ARC_max)
741 bfd_set_error (bfd_error_bad_value);
744 howto = arc_elf_howto (r_type);
746 reloc_data.input_section = input_section;
747 reloc_data.howto = howto;
748 reloc_data.reloc_offset = rel->r_offset;
749 reloc_data.reloc_addend = rel->r_addend;
751 r_symndx = ELF32_R_SYM (rel->r_info);
753 /* This is a final link. */
758 if (r_symndx < symtab_hdr->sh_info) /* A local symbol. */
760 sym = local_syms + r_symndx;
761 sec = local_sections[r_symndx];
763 reloc_data.sym_value = sym->st_value;
764 reloc_data.sym_section = sec;
766 if (is_reloc_for_GOT (reloc_data.howto))
768 local_got_offsets = arc_get_local_got_offsets (output_bfd);
769 reloc_data.got_offset_value = local_got_offsets[r_symndx];
772 reloc_data.should_relocate = TRUE;
774 else /* Global symbol. */
776 /* Get the symbol's entry in the symtab. */
777 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
779 while (h->root.type == bfd_link_hash_indirect
780 || h->root.type == bfd_link_hash_warning)
781 h = (struct elf_link_hash_entry *) h->root.u.i.link;
783 BFD_ASSERT ((h->dynindx == -1) >= (h->forced_local != 0));
784 /* If we have encountered a definition for this symbol. */
785 if (h->root.type == bfd_link_hash_defined
786 || h->root.type == bfd_link_hash_defweak)
788 reloc_data.sym_value = h->root.u.def.value;
789 reloc_data.sym_section = h->root.u.def.section;
791 reloc_data.should_relocate = TRUE;
793 if (is_reloc_for_GOT (howto))
795 struct dynamic_sections ds =
796 arc_create_dynamic_sections (output_bfd, info);
798 /* TODO: Change it to use arc_do_relocation with ARC_32
801 reloc_data.sym_value + reloc_data.reloc_addend
802 + reloc_data.sym_section->output_offset
803 + reloc_data.sym_section->output_section->vma;
805 bfd_put_32 (output_bfd, relocation, ds.sgot->contents + h->got.offset);
809 else if (h->root.type == bfd_link_hash_undefweak)
811 /* Is weak symbol and has no definition. */
816 if (is_reloc_for_GOT (howto))
818 struct dynamic_sections ds =
819 arc_create_dynamic_sections (output_bfd, info);
821 reloc_data.sym_value = h->root.u.def.value;
822 reloc_data.sym_section = ds.sgot;
824 reloc_data.should_relocate = TRUE;
826 else if (is_reloc_for_PLT (howto))
828 struct dynamic_sections ds =
829 arc_create_dynamic_sections (output_bfd, info);
831 reloc_data.sym_value = h->plt.offset;
832 reloc_data.sym_section = ds.splt;
834 reloc_data.should_relocate = TRUE;
836 else if (!(*info->callbacks->undefined_symbol)
837 (info, h->root.root.string, input_bfd, input_section,
838 rel->r_offset,!bfd_link_pic (info)))
844 reloc_data.got_offset_value = h->got.offset;
847 if (is_reloc_SDA_relative (howto) && reloc_data.sdata_begin_symbol_vma_set == FALSE)
849 (*_bfd_error_handler)
850 ("Error: Linker symbol __SDATA_BEGIN__ not found");
851 bfd_set_error (bfd_error_bad_value);
855 DEBUG_ARC_RELOC (reloc_data);
856 if (arc_do_relocation (contents, reloc_data) != bfd_reloc_ok)
863 static struct dynamic_sections
864 arc_create_dynamic_sections (bfd * abfd, struct bfd_link_info *info)
866 static bfd * dynobj = NULL;
867 struct dynamic_sections ds =
869 .initialized = FALSE,
880 elf_hash_table (info)->dynobj = dynobj = abfd;
881 if (!_bfd_elf_create_got_section (dynobj, info))
885 dynobj = (elf_hash_table (info))->dynobj;
887 ds.sgot = bfd_get_section_by_name (dynobj, ".got");
889 ds.srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
890 if (ds.srelgot == NULL)
892 ds.srelgot = bfd_make_section_with_flags (dynobj, ".rela.got",
899 if (ds.srelgot == NULL
900 || !bfd_set_section_alignment (dynobj, ds.srelgot, 2))
904 ds.sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
906 ds.sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
907 ds.splt = bfd_get_section_by_name (dynobj, ".plt");
908 ds.srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
910 ds.initialized = TRUE;
915 #define ADD_SYMBOL_REF_SEC_AND_RELOC(SECNAME, COND_FOR_RELOC, H) \
916 ds.s##SECNAME->size; \
918 if (COND_FOR_RELOC) ds.srel##SECNAME->size += sizeof (Elf32_External_Rela); \
920 if (h->dynindx == -1 && !h->forced_local) \
921 if (! bfd_elf_link_record_dynamic_symbol (info, H)) \
923 ds.s##SECNAME->size += 4; \
927 elf_arc_check_relocs (bfd * abfd,
928 struct bfd_link_info * info,
930 const Elf_Internal_Rela * relocs)
932 Elf_Internal_Shdr * symtab_hdr;
933 struct elf_link_hash_entry ** sym_hashes;
934 bfd_vma * local_got_offsets;
935 const Elf_Internal_Rela * rel;
936 const Elf_Internal_Rela * rel_end;
937 bfd * dynobj ATTRIBUTE_UNUSED;
939 dynobj = (elf_hash_table (info))->dynobj;
940 symtab_hdr = &((elf_tdata (abfd))->symtab_hdr);
941 sym_hashes = elf_sym_hashes (abfd);
942 local_got_offsets = arc_get_local_got_offsets (abfd);
944 struct dynamic_sections ds = arc_create_dynamic_sections (abfd, info);
946 rel_end = relocs + sec->reloc_count;
947 for (rel = relocs; rel < rel_end; rel++)
949 enum elf_arc_reloc_type r_type;
950 reloc_howto_type *howto;
951 unsigned long r_symndx;
952 struct elf_link_hash_entry *h;
954 r_type = ELF32_R_TYPE (rel->r_info);
956 if (r_type >= (int) R_ARC_max)
958 bfd_set_error (bfd_error_bad_value);
961 howto = arc_elf_howto (r_type);
963 /* Load symbol information. */
964 r_symndx = ELF32_R_SYM (rel->r_info);
965 if (r_symndx < symtab_hdr->sh_info) /* Is a local symbol. */
967 else /* Global one. */
968 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
970 if (is_reloc_for_PLT (howto) == TRUE)
978 if (is_reloc_for_GOT (howto) == TRUE)
983 local_got_offsets[r_symndx] =
984 ADD_SYMBOL_REF_SEC_AND_RELOC (got, bfd_link_pic (info), NULL);
989 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
991 ADD_SYMBOL_REF_SEC_AND_RELOC (got, TRUE, h);
999 #define ELF_DYNAMIC_INTERPRETER "/sbin/ld-uClibc.so"
1001 /* Size of one plt entry in bytes. */
1002 #define PLT_ENTRY_SIZE 12
1003 #define PLT_ENTRY_SIZE_V2 16
1005 /* Instructions appear in memory as a sequence of half-words (16 bit);
1006 individual half-words are represented on the target in target byte order.
1007 We use 'unsigned short' on the host to represent the PLT templates,
1008 and translate to target byte order as we copy to the target. */
1009 typedef unsigned short insn_hword;
1012 /* TODO: Make this PLT entry code be in a separate object file. */
1013 /* TODO: This is a linker BTW, we should be able to link. :) */
1015 /* The zeroth entry in the absolute plt entry. */
1016 static const insn_hword elf_arc_abs_plt0_entry[2 * PLT_ENTRY_SIZE / 2] =
1018 0x1600, /* ld %r11, [0] */
1022 0x1600, /* ld %r10, [0] */
1026 0x2020, /* j [%r10] */
1027 0x0280, /* ---"---- */
1032 /* Contents of the subsequent entries in the absolute plt. */
1033 static const insn_hword elf_arc_abs_pltn_entry[PLT_ENTRY_SIZE / 2] =
1035 0x2730, /* ld %r12, [%pc,func@gotpc] */
1036 0x7f8c, /* ------ " " -------------- */
1037 0x0000, /* ------ " " -------------- */
1038 0x0000, /* ------ " " -------------- */
1039 0x7c20, /* j_s.d [%r12] */
1040 0x74ef /* mov_s %r12, %pcl */
1043 /* The zeroth entry in the absolute plt entry for ARCv2. */
1044 static const insn_hword elf_arcV2_abs_plt0_entry[2 * PLT_ENTRY_SIZE_V2 / 2] =
1046 0x1600, 0x700b, 0, 0, /* ld %r11, [0] */
1047 0x1600, 0x700a, 0, 0, /* ld %r10, [0] */
1048 0x2020, 0x0280, /* j [%r10] */
1049 0x0000, 0x0000, /* -> RELOCATED TO ABS ADDRESS OF GOT <- */
1056 /* Contents of the subsequent entries in the absolute plt for ARCv2. */
1057 static const insn_hword elf_arcV2_abs_pltn_entry[PLT_ENTRY_SIZE_V2 / 2] =
1059 0x2730, /* ld %r12, [%pcl,func@gotpc] */
1060 0x7f8c, /* ------ " " -------------- */
1061 0x0000, /* ------ " " -------------- */
1062 0x0000, /* ------ " " -------------- */
1063 0x2021, /* j.d [%r12] */
1064 0x0300, /* ------ " " -------------- */
1065 0x240a, /* mov %r12, %pcl */
1066 0x1fc0 /* ------ " " -------------- */
1069 /* The zeroth entry in the pic plt entry. */
1070 static const insn_hword elf_arc_pic_plt0_entry[2 * PLT_ENTRY_SIZE / 2] =
1072 0x2730, /* ld %r11, [pcl,0] : 0 to be replaced by
1077 0x2730, /* ld %r10, [pcl,0] : 0 to be replaced by
1082 0x2020, /* j [%r10] */
1083 0x0280, /* ---"---- */
1088 /* Contents of the subsequent entries in the pic plt. */
1089 static const insn_hword elf_arc_pic_pltn_entry[PLT_ENTRY_SIZE / 2] =
1091 0x2730, /* ld %r12, [%pc,func@got] */
1092 0x7f8c, /* ------ " " -------------- */
1093 0x0000, /* ------ " " -------------- */
1094 0x0000, /* ------ " " -------------- */
1095 0x7c20, /* j_s.d [%r12] */
1096 0x74ef, /* mov_s %r12, %pcl */
1099 /* The zeroth entry in the pic plt entry for ARCv2. */
1100 static const insn_hword elf_arcV2_pic_plt0_entry[2 * PLT_ENTRY_SIZE_V2 / 2] =
1102 0x2730, /* ld %r11, [pcl,0] : 0 to be replaced by
1107 0x2730, /* ld %r10, [pcl,0] : 0 to be replaced by
1112 0x2020, /* j [%r10] */
1113 0x0280, /* ---"---- */
1122 #define elf_arcV2_pic_PLT0_ENTRY_SIZE (2 * PLT_ENTRY_SIZE_V2/2)
1124 /* Contents of the subsequent entries in the pic plt for ARCv2. */
1125 static const insn_hword elf_arcV2_pic_pltn_entry[PLT_ENTRY_SIZE_V2 / 2] =
1127 0x2730, /* ld %r12, [%pc,func@got] */
1128 0x7f8c, /* ------ " " -------------- */
1129 0x0000, /* ------ " " -------------- */
1130 0x0000, /* ------ " " -------------- */
1131 0x2021, /* j.d [%r12] */
1132 0x0300, /* ------ " " -------------- */
1133 0x240a, /* mov %r12, %pcl */
1134 0x1fc0 /* ------ " " -------------- */
1137 #define elf_arcV2_pic_PLTN_ENTRY_SIZE (PLT_ENTRY_SIZE_V2/2)
1139 enum plt_reloc_symbol
1145 RELATIVE = (1 << 8),
1146 MIDDLE_ENDIAN = (1 << 9)
1149 #define IS_RELATIVE(S) ((S & RELATIVE) != 0)
1150 #define IS_MIDDLE_ENDIAN(S) ((S & MIDDLE_ENDIAN) != 0)
1151 #define SYM_ONLY(S) (S & 0xFF)
1158 enum plt_reloc_symbol symbol;
1162 struct plt_version_t
1164 const insn_hword * entry;
1165 const bfd_vma entry_size;
1166 const insn_hword * elem;
1167 const bfd_vma elem_size;
1169 struct plt_reloc entry_relocs[5];
1170 struct plt_reloc elem_relocs[5];
1174 #define PLT_DATA(NAME, ...) \
1175 .entry = NAME##_plt0_entry, \
1176 .entry_size = NAME##_PLT0_ENTRY_SIZE, \
1177 .elem = NAME##_pltn_entry, \
1178 .elem_size = NAME##_PLTN_ENTRY_SIZE
1180 struct plt_version_t plt_versions[] =
1183 PLT_DATA (elf_arcV2_pic),
1186 {4, 32, 0xFFFFFFFF, SGOT | RELATIVE | MIDDLE_ENDIAN, 4},
1187 {12, 32, 0xFFFFFFFF, SGOT | RELATIVE | MIDDLE_ENDIAN, 8},
1188 {20, 32, 0xFFFFFFFF, SGOT, 0},
1189 {0, 0, 0, LAST_RELOC, 0}
1193 {4, 32, 0xFFFFFFFF, SGOT, 0},
1194 {0, 0, 0, LAST_RELOC, 0}
1200 static struct plt_version_t *
1201 arc_get_plt_version (void)
1203 return &(plt_versions[0]);
1207 add_symbol_to_plt (struct bfd_link_info *info)
1209 bfd *dynobj = (elf_hash_table (info))->dynobj;
1210 struct dynamic_sections ds = arc_create_dynamic_sections (dynobj, info);
1213 /* If this is the first .plt entry, make room for the special first entry. */
1214 if (ds.splt->size == 0)
1215 ds.splt->size += 2 *
1216 (bfd_get_mach (dynobj) == bfd_mach_arc_arcv2
1217 ? PLT_ENTRY_SIZE_V2 : PLT_ENTRY_SIZE);
1219 ret = ds.splt->size;
1221 ds.splt->size += (bfd_get_mach (dynobj) == bfd_mach_arc_arcv2
1225 ds.sgotplt->size += 4;
1226 ds.srelplt->size += sizeof (Elf32_External_Rela);
1231 #define PLT_DO_RELOCS_FOR_ENTRY(DS, RELOCS) \
1232 plt_do_relocs_for_symbol (DS, RELOCS, 0, 0)
1235 plt_do_relocs_for_symbol (struct dynamic_sections *ds,
1236 struct plt_reloc *reloc,
1238 bfd_vma symbol_got_offset)
1240 while (SYM_ONLY (reloc->symbol) != LAST_RELOC)
1242 bfd_vma relocation = 0;
1244 switch (SYM_ONLY (reloc->symbol))
1248 ds->sgotplt->output_section->vma +
1249 ds->sgotplt->output_offset + symbol_got_offset;
1252 relocation += reloc->addend;
1254 relocation -= (IS_RELATIVE (reloc->symbol))
1255 ? ds->splt->output_section->vma + ds->splt->output_offset +
1256 plt_offset + reloc->offset : 0;
1258 if (IS_MIDDLE_ENDIAN (reloc->symbol))
1261 ((relocation & 0xffff0000) >> 16) |
1262 ((relocation & 0xffff) << 16);
1265 switch (reloc->size)
1268 bfd_put_32 (ds->splt->output_section->owner,
1270 ds->splt->contents + plt_offset + reloc->offset);
1274 reloc = &(reloc[1]); /* Jump to next relocation. */
1279 relocate_plt_for_symbol (struct bfd_link_info *info,
1280 struct elf_link_hash_entry *h)
1282 bfd * dynobj = elf_hash_table (info)->dynobj;
1283 struct plt_version_t *plt_data = arc_get_plt_version ();
1284 struct dynamic_sections ds = arc_create_dynamic_sections (dynobj, info);
1286 bfd_vma plt_index = h->plt.offset / plt_data->elem_size;
1287 bfd_vma got_offset = (plt_index + 3) * 4;
1289 memcpy (ds.splt->contents + h->plt.offset, plt_data->elem,
1290 plt_data->elem_size * sizeof (insn_hword));
1291 plt_do_relocs_for_symbol (&ds, plt_data->elem_relocs, h->plt.offset,
1296 relocate_plt_for_entry (struct bfd_link_info *info)
1298 bfd * dynobj = (elf_hash_table (info))->dynobj;
1299 struct plt_version_t *plt_data = arc_get_plt_version ();
1300 struct dynamic_sections ds = arc_create_dynamic_sections (dynobj, info);
1302 memcpy (ds.splt->contents, plt_data->entry,
1303 plt_data->entry_size * sizeof (insn_hword));
1304 PLT_DO_RELOCS_FOR_ENTRY (&ds, plt_data->entry_relocs);
1308 /* Desc : Adjust a symbol defined by a dynamic object and referenced by a
1309 regular object. The current definition is in some section of the
1310 dynamic object, but we're not including those sections. We have to
1311 change the definition to something the rest of the link can
1315 elf_arc_adjust_dynamic_symbol (struct bfd_link_info *info,
1316 struct elf_link_hash_entry *h)
1318 bfd *dynobj = (elf_hash_table (info))->dynobj;
1319 struct dynamic_sections ds = arc_create_dynamic_sections (dynobj, info);
1321 if (h->needs_plt == 1)
1323 if (!bfd_link_pic (info) && !h->def_dynamic && !h->ref_dynamic)
1325 /* This case can occur if we saw a PLT32 reloc in an input
1326 file, but the symbol was never referred to by a dynamic
1327 object. In such a case, we don't actually need to build
1328 a procedure linkage table, and we can just do a PC32
1330 BFD_ASSERT (h->needs_plt);
1334 /* Make sure this symbol is output as a dynamic symbol. */
1335 if (h->dynindx == -1 && !h->forced_local
1336 && !bfd_elf_link_record_dynamic_symbol (info, h))
1339 if (bfd_link_pic (info) || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1341 bfd_vma loc = add_symbol_to_plt (info);
1343 if (!bfd_link_pic (info) && !h->def_regular)
1345 h->root.u.def.section = ds.splt;
1346 h->root.u.def.value = loc;
1348 h->plt.offset = loc;
1353 h->plt.offset = (bfd_vma) - 1;
1360 #define ADD_RELA(BFD, SECTION, OFFSET, SYM_IDX, TYPE, ADDEND) \
1362 struct dynamic_sections ds = arc_create_dynamic_sections (output_bfd, info); \
1363 bfd_byte * rloc = ds.srel##SECTION->contents + \
1364 ((ds.srel##SECTION->reloc_count++) * sizeof (Elf32_External_Rela)); \
1365 Elf_Internal_Rela rel; \
1366 bfd_put_32 (output_bfd, (bfd_vma) 0, ds.s##SECTION->contents + OFFSET); \
1367 rel.r_addend = ADDEND; \
1368 rel.r_offset = (ds.s##SECTION)->output_section->vma + (ds.s##SECTION)->output_offset + OFFSET; \
1369 rel.r_info = ELF32_R_INFO (SYM_IDX, TYPE); \
1370 bfd_elf32_swap_reloca_out (BFD, &rel, rloc); \
1373 /* Function : elf_arc_finish_dynamic_symbol
1374 Brief : Finish up dynamic symbol handling. We set the
1375 contents of various dynamic sections here.
1380 Returns : True/False as the return status. */
1382 elf_arc_finish_dynamic_symbol (bfd * output_bfd,
1383 struct bfd_link_info *info,
1384 struct elf_link_hash_entry *h,
1385 Elf_Internal_Sym * sym)
1387 if (h->plt.offset != (bfd_vma) - 1)
1388 relocate_plt_for_symbol (info, h);
1390 if (h->got.offset != (bfd_vma) - 1)
1392 if (bfd_link_pic (info) && (info->symbolic || h->dynindx == -1)
1395 ADD_RELA (output_bfd, got, h->got.offset, 0, R_ARC_RELATIVE, 0);
1399 ADD_RELA (output_bfd, got, h->got.offset, h->dynindx,
1404 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
1405 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
1406 || strcmp (h->root.root.string, "__DYNAMIC") == 0
1407 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
1408 sym->st_shndx = SHN_ABS;
1413 #define GET_SYMBOL_OR_SECTION(TAG, SYMBOL, SECTION) \
1415 if (SYMBOL != NULL) \
1417 h = elf_link_hash_lookup (elf_hash_table (info), SYMBOL, FALSE, FALSE, TRUE); \
1419 else if (SECTION != NULL) \
1421 s = bfd_get_section_by_name (output_bfd, SECTION); \
1422 BFD_ASSERT (s != NULL); \
1427 /* Function : elf_arc_finish_dynamic_sections
1428 Brief : Finish up the dynamic sections handling.
1433 Returns : True/False as the return status. */
1435 elf_arc_finish_dynamic_sections (bfd * output_bfd, struct bfd_link_info *info)
1437 struct dynamic_sections ds = arc_create_dynamic_sections (output_bfd, info);
1438 bfd *dynobj = (elf_hash_table (info))->dynobj;
1442 Elf32_External_Dyn *dyncon, *dynconend;
1444 dyncon = (Elf32_External_Dyn *) ds.sdyn->contents;
1446 (Elf32_External_Dyn *) (ds.sdyn->contents + ds.sdyn->size);
1447 for (; dyncon < dynconend; dyncon++)
1449 Elf_Internal_Dyn internal_dyn;
1450 bfd_boolean do_it = FALSE;
1452 struct elf_link_hash_entry *h = NULL;
1455 bfd_elf32_swap_dyn_in (dynobj, dyncon, &internal_dyn);
1457 switch (internal_dyn.d_tag)
1459 GET_SYMBOL_OR_SECTION (DT_INIT, "_init", NULL)
1460 GET_SYMBOL_OR_SECTION (DT_FINI, "_fini", NULL)
1461 GET_SYMBOL_OR_SECTION (DT_PLTGOT, NULL, ".plt")
1462 GET_SYMBOL_OR_SECTION (DT_JMPREL, NULL, ".rela.plt")
1463 GET_SYMBOL_OR_SECTION (DT_PLTRELSZ, NULL, ".rela.plt")
1464 GET_SYMBOL_OR_SECTION (DT_RELASZ, NULL, ".rela.plt")
1469 /* In case the dynamic symbols should be updated with a
1472 && (h->root.type == bfd_link_hash_defined
1473 || h->root.type == bfd_link_hash_defweak)
1478 internal_dyn.d_un.d_val = h->root.u.def.value;
1479 asec_ptr = h->root.u.def.section;
1480 if (asec_ptr->output_section != NULL)
1482 internal_dyn.d_un.d_val +=
1483 (asec_ptr->output_section->vma +
1484 asec_ptr->output_offset);
1488 /* The symbol is imported from another
1489 shared library and does not apply to this
1491 internal_dyn.d_un.d_val = 0;
1495 else if (s != NULL) /* With a section information. */
1497 switch (internal_dyn.d_tag)
1501 internal_dyn.d_un.d_ptr = s->vma;
1506 internal_dyn.d_un.d_val = s->size;
1511 internal_dyn.d_un.d_val -= s->size;
1521 bfd_elf32_swap_dyn_out (output_bfd, &internal_dyn, dyncon);
1524 if (ds.splt->size > 0)
1526 relocate_plt_for_entry (info);
1529 elf_section_data (ds.srelplt->output_section)->this_hdr.sh_entsize = 0xc;
1532 /* Fill in the first three entries in the global offset table. */
1535 if (ds.sgot->size > 0)
1537 if (ds.sdyn == NULL)
1538 bfd_put_32 (output_bfd, (bfd_vma) 0,
1539 ds.sgotplt->contents);
1541 bfd_put_32 (output_bfd,
1542 ds.sdyn->output_section->vma + ds.sdyn->output_offset,
1543 ds.sgotplt->contents);
1544 bfd_put_32 (output_bfd, (bfd_vma) 0, ds.sgotplt->contents + 4);
1545 bfd_put_32 (output_bfd, (bfd_vma) 0, ds.sgotplt->contents + 8);
1547 elf_section_data (ds.sgot->output_section)->this_hdr.sh_entsize = 4;
1552 /* Check that the linker script has not dumped the .srelgot section. */
1553 && ds.srelgot->output_section
1554 && elf_section_data (ds.srelgot->output_section))
1556 /* TODO: Make it work even if I remove this. */
1557 elf_section_data (ds.srelgot->output_section)->this_hdr.sh_entsize = 0xc;
1563 #define ADD_DYNAMIC_SYMBOL(NAME, TAG) \
1564 h = elf_link_hash_lookup (elf_hash_table (info), NAME, FALSE, FALSE, FALSE); \
1565 if ((h != NULL && (h->ref_regular || h->def_regular))) \
1566 if (! _bfd_elf_add_dynamic_entry (info, TAG, 0)) \
1569 /* Set the sizes of the dynamic sections. */
1571 elf_arc_size_dynamic_sections (bfd * output_bfd, struct bfd_link_info *info)
1575 bfd_boolean relocs_exist;
1576 bfd_boolean reltext_exist;
1577 struct dynamic_sections ds = arc_create_dynamic_sections (output_bfd, info);
1579 dynobj = (elf_hash_table (info))->dynobj;
1580 BFD_ASSERT (dynobj != NULL);
1582 if ((elf_hash_table (info))->dynamic_sections_created)
1584 struct elf_link_hash_entry *h;
1586 /* Set the contents of the .interp section to the interpreter. */
1587 if (!bfd_link_pic (info))
1589 s = bfd_get_section_by_name (dynobj, ".interp");
1590 BFD_ASSERT (s != NULL);
1591 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1592 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1595 /* Add some entries to the .dynamic section. We fill in some of the
1596 values later, in elf_bfd_final_link, but we must add the entries
1597 now so that we know the final size of the .dynamic section.
1598 Checking if the .init section is present. We also create DT_INIT
1599 and DT_FINI entries if the init_str has been changed by the user. */
1601 ADD_DYNAMIC_SYMBOL ("init", DT_INIT);
1602 ADD_DYNAMIC_SYMBOL ("fini", DT_FINI);
1606 /* We may have created entries in the .rela.got section. However, if
1607 we are not creating the dynamic sections, we will not actually
1608 use these entries. Reset the size of .rela.got, which will cause
1609 it to get stripped from the output file below. */
1610 ds.srelgot->size = 0;
1613 for (s = dynobj->sections; s != NULL; s = s->next)
1615 bfd_boolean is_dynamic_section = FALSE;
1617 /* Skip any non dynamic section. */
1618 if (strstr (s->name, ".plt") != NULL
1619 || strstr (s->name, ".got") != NULL
1620 || strstr (s->name, ".rel") != NULL)
1621 is_dynamic_section = TRUE;
1623 /* Allocate memory for the section contents. */
1624 if (!is_dynamic_section)
1627 s->contents = (bfd_byte *) bfd_alloc (dynobj, s->size);
1628 if (s->contents == NULL && s->size != 0)
1633 s->flags |= SEC_EXCLUDE;
1637 if (strcmp (s->name, ".rela.plt") != 0)
1639 const char *outname = bfd_get_section_name (output_bfd,
1641 asection *target = bfd_get_section_by_name (output_bfd,
1644 relocs_exist = TRUE;
1645 if (target != NULL && target->size != 0
1646 && (target->flags & SEC_READONLY) != 0
1647 && (target->flags & SEC_ALLOC) != 0)
1648 reltext_exist = TRUE;
1654 if (ds.splt && ds.splt->size != 0)
1655 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0)
1656 || !_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0)
1657 || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
1658 || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0)
1662 if (relocs_exist == TRUE)
1663 if (!_bfd_elf_add_dynamic_entry (info, DT_RELA, 0)
1664 || !_bfd_elf_add_dynamic_entry (info, DT_RELASZ, 0)
1665 || !_bfd_elf_add_dynamic_entry (info, DT_RELENT,
1666 sizeof (Elf32_External_Rela))
1670 if (reltext_exist == TRUE)
1671 if (!_bfd_elf_add_dynamic_entry (info, DT_TEXTREL, 0))
1679 #define TARGET_LITTLE_SYM arc_elf32_le_vec
1680 #define TARGET_LITTLE_NAME "elf32-littlearc"
1681 #define TARGET_BIG_SYM arc_elf32_be_vec
1682 #define TARGET_BIG_NAME "elf32-bigarc"
1683 #define ELF_ARCH bfd_arch_arc
1684 #define ELF_MACHINE_CODE EM_ARC_COMPACT
1685 #define ELF_MACHINE_ALT1 EM_ARC_COMPACT2
1686 #define ELF_MAXPAGESIZE 0x2000
1688 #define elf_info_to_howto_rel arc_info_to_howto_rel
1689 #define elf_backend_object_p arc_elf_object_p
1690 #define elf_backend_final_write_processing arc_elf_final_write_processing
1692 #define elf_backend_relocate_section elf_arc_relocate_section
1693 #define elf_backend_check_relocs elf_arc_check_relocs
1694 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
1696 #define elf_backend_adjust_dynamic_symbol elf_arc_adjust_dynamic_symbol
1697 #define elf_backend_finish_dynamic_symbol elf_arc_finish_dynamic_symbol
1699 #define elf_backend_finish_dynamic_sections elf_arc_finish_dynamic_sections
1700 #define elf_backend_size_dynamic_sections elf_arc_size_dynamic_sections
1702 #define elf_backend_can_gc_sections 1
1703 #define elf_backend_want_got_plt 1
1704 #define elf_backend_plt_readonly 1
1705 #define elf_backend_want_plt_sym 0
1706 #define elf_backend_got_header_size 12
1708 #define elf_backend_may_use_rel_p 0
1709 #define elf_backend_may_use_rela_p 1
1710 #define elf_backend_default_use_rela_p 1
1712 #include "elf32-target.h"