1 /* ARC-specific support for 32-bit ELF
2 Copyright (C) 1994-2018 Free Software Foundation, Inc.
3 Contributed by Cupertino Miranda (cmiranda@synopsys.com).
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"
29 #include "opcode/arc.h"
32 #define FEATURE_LIST_NAME bfd_feature_list
33 #define CONFLICT_LIST bfd_conflict_list
34 #include "opcode/arc-attrs.h"
36 /* #define ARC_ENABLE_DEBUG 1 */
37 #ifdef ARC_ENABLE_DEBUG
39 name_for_global_symbol (struct elf_link_hash_entry *h)
41 static char *local_str = "(local)";
44 return h->root.root.string;
46 #define ARC_DEBUG(fmt, args...) fprintf (stderr, fmt, ##args)
48 #define ARC_DEBUG(...)
52 #define ADD_RELA(BFD, SECTION, OFFSET, SYM_IDX, TYPE, ADDEND) \
54 struct elf_link_hash_table *_htab = elf_hash_table (info); \
55 Elf_Internal_Rela _rel; \
58 if (_htab->dynamic_sections_created == TRUE) \
60 BFD_ASSERT (_htab->srel##SECTION &&_htab->srel##SECTION->contents); \
61 _loc = _htab->srel##SECTION->contents \
62 + ((_htab->srel##SECTION->reloc_count) \
63 * sizeof (Elf32_External_Rela)); \
64 _htab->srel##SECTION->reloc_count++; \
65 _rel.r_addend = ADDEND; \
66 _rel.r_offset = (_htab->s##SECTION)->output_section->vma \
67 + (_htab->s##SECTION)->output_offset + OFFSET; \
68 BFD_ASSERT ((long) SYM_IDX != -1); \
69 _rel.r_info = ELF32_R_INFO (SYM_IDX, TYPE); \
70 bfd_elf32_swap_reloca_out (BFD, &_rel, _loc); \
75 /* The default symbols representing the init and fini dyn values.
76 TODO: Check what is the relation of those strings with arclinux.em
78 #define INIT_SYM_STRING "_init"
79 #define FINI_SYM_STRING "_fini"
81 char * init_str = INIT_SYM_STRING;
82 char * fini_str = FINI_SYM_STRING;
84 #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \
89 static ATTRIBUTE_UNUSED const char *
90 reloc_type_to_name (unsigned int type)
94 #include "elf/arc-reloc.def"
102 #undef ARC_RELOC_HOWTO
104 /* Try to minimize the amount of space occupied by relocation tables
105 on the ROM (not that the ROM won't be swamped by other ELF overhead). */
109 static ATTRIBUTE_UNUSED bfd_boolean
110 is_reloc_PC_relative (reloc_howto_type *howto)
112 return (strstr (howto->name, "PC") != NULL) ? TRUE : FALSE;
116 is_reloc_SDA_relative (reloc_howto_type *howto)
118 return (strstr (howto->name, "SDA") != NULL) ? TRUE : FALSE;
122 is_reloc_for_GOT (reloc_howto_type * howto)
124 if (strstr (howto->name, "TLS") != NULL)
126 return (strstr (howto->name, "GOT") != NULL) ? TRUE : FALSE;
130 is_reloc_for_PLT (reloc_howto_type * howto)
132 return (strstr (howto->name, "PLT") != NULL) ? TRUE : FALSE;
136 is_reloc_for_TLS (reloc_howto_type *howto)
138 return (strstr (howto->name, "TLS") != NULL) ? TRUE : FALSE;
141 struct arc_relocation_data
143 bfd_signed_vma reloc_offset;
144 bfd_signed_vma reloc_addend;
145 bfd_signed_vma got_offset_value;
147 bfd_signed_vma sym_value;
148 asection * sym_section;
150 reloc_howto_type *howto;
152 asection * input_section;
154 bfd_signed_vma sdata_begin_symbol_vma;
155 bfd_boolean sdata_begin_symbol_vma_set;
156 bfd_signed_vma got_symbol_vma;
158 bfd_boolean should_relocate;
160 const char * symbol_name;
163 /* ARC ELF linker hash entry. */
164 struct elf_arc_link_hash_entry
166 struct elf_link_hash_entry root;
168 /* Track dynamic relocs copied for this symbol. */
169 struct elf_dyn_relocs *dyn_relocs;
171 struct got_entry *got_ents;
175 /* Should be included at this location due to static declarations
176 defined before this point. */
179 #define arc_bfd_get_8(A,B,C) bfd_get_8(A,B)
180 #define arc_bfd_get_16(A,B,C) bfd_get_16(A,B)
181 #define arc_bfd_get_32(A,B,C) bfd_get_32(A,B)
182 #define arc_bfd_put_8(A,B,C,D) bfd_put_8(A,B,C)
183 #define arc_bfd_put_16(A,B,C,D) bfd_put_16(A,B,C)
184 #define arc_bfd_put_32(A,B,C,D) bfd_put_32(A,B,C)
187 static bfd_reloc_status_type
188 arc_elf_reloc (bfd *abfd ATTRIBUTE_UNUSED,
189 arelent *reloc_entry,
191 void *data ATTRIBUTE_UNUSED,
192 asection *input_section,
194 char ** error_message ATTRIBUTE_UNUSED)
196 if (output_bfd != NULL)
198 reloc_entry->address += input_section->output_offset;
200 /* In case of relocateable link and if the reloc is against a
201 section symbol, the addend needs to be adjusted according to
202 where the section symbol winds up in the output section. */
203 if ((symbol_in->flags & BSF_SECTION_SYM) && symbol_in->section)
204 reloc_entry->addend += symbol_in->section->output_offset;
209 return bfd_reloc_continue;
213 #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \
218 #include "elf/arc-reloc.def"
222 #undef ARC_RELOC_HOWTO
224 #define ARC_RELOC_HOWTO(TYPE, VALUE, RSIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \
225 [TYPE] = HOWTO (R_##TYPE, 0, RSIZE, BITSIZE, FALSE, 0, \
226 complain_overflow_##OVERFLOW, arc_elf_reloc, \
227 "R_" #TYPE, FALSE, 0, 0, FALSE),
229 static struct reloc_howto_struct elf_arc_howto_table[] =
231 #include "elf/arc-reloc.def"
232 /* Example of what is generated by the preprocessor. Currently kept as an
234 HOWTO (R_ARC_NONE, // Type.
236 2, // Size (0 = byte, 1 = short, 2 = long).
238 FALSE, // PC_relative.
240 complain_overflow_bitfield, // Complain_on_overflow.
241 bfd_elf_generic_reloc, // Special_function.
242 "R_ARC_NONE", // Name.
243 TRUE, // Partial_inplace.
246 FALSE), // PCrel_offset.
249 #undef ARC_RELOC_HOWTO
252 arc_elf_howto_init (void)
254 #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \
255 elf_arc_howto_table[TYPE].pc_relative = \
256 (strstr (#FORMULA, " P ") != NULL || strstr (#FORMULA, " PDATA ") != NULL); \
257 elf_arc_howto_table[TYPE].dst_mask = RELOC_FUNCTION(0, ~0); \
258 /* Only 32 bit data relocations should be marked as ME. */ \
259 if (strstr (#FORMULA, " ME ") != NULL) \
261 BFD_ASSERT (SIZE == 2); \
264 #include "elf/arc-reloc.def"
267 #undef ARC_RELOC_HOWTO
270 #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \
273 const int howto_table_lookup[] =
275 #include "elf/arc-reloc.def"
278 #undef ARC_RELOC_HOWTO
280 static reloc_howto_type *
281 arc_elf_howto (unsigned int r_type)
283 if (elf_arc_howto_table[R_ARC_32].dst_mask == 0)
284 arc_elf_howto_init ();
285 return &elf_arc_howto_table[r_type];
288 /* Map BFD reloc types to ARC ELF reloc types. */
292 bfd_reloc_code_real_type bfd_reloc_val;
293 unsigned char elf_reloc_val;
296 /* ARC ELF linker hash table. */
297 struct elf_arc_link_hash_table
299 struct elf_link_hash_table elf;
302 static struct bfd_hash_entry *
303 elf_arc_link_hash_newfunc (struct bfd_hash_entry *entry,
304 struct bfd_hash_table *table,
307 struct elf_arc_link_hash_entry * ret =
308 (struct elf_arc_link_hash_entry *) entry;
310 /* Allocate the structure if it has not already been allocated by a
313 ret = (struct elf_arc_link_hash_entry *)
314 bfd_hash_allocate (table, sizeof (struct elf_arc_link_hash_entry));
316 return (struct bfd_hash_entry *) ret;
318 /* Call the allocation method of the superclass. */
319 ret = ((struct elf_arc_link_hash_entry *)
320 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
324 ret->dyn_relocs = NULL;
325 ret->got_ents = NULL;
328 return (struct bfd_hash_entry *) ret;
331 /* Destroy an ARC ELF linker hash table. */
333 elf_arc_link_hash_table_free (bfd *obfd)
335 _bfd_elf_link_hash_table_free (obfd);
338 /* Create an ARC ELF linker hash table. */
340 static struct bfd_link_hash_table *
341 arc_elf_link_hash_table_create (bfd *abfd)
343 struct elf_arc_link_hash_table *ret;
345 ret = (struct elf_arc_link_hash_table *) bfd_zmalloc (sizeof (*ret));
349 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
350 elf_arc_link_hash_newfunc,
351 sizeof (struct elf_arc_link_hash_entry),
358 ret->elf.root.hash_table_free = elf_arc_link_hash_table_free;
360 return &ret->elf.root;
363 #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \
364 { BFD_RELOC_##TYPE, R_##TYPE },
366 static const struct arc_reloc_map arc_reloc_map[] =
368 #include "elf/arc-reloc.def"
370 {BFD_RELOC_NONE, R_ARC_NONE},
371 {BFD_RELOC_8, R_ARC_8},
372 {BFD_RELOC_16, R_ARC_16},
373 {BFD_RELOC_24, R_ARC_24},
374 {BFD_RELOC_32, R_ARC_32},
377 #undef ARC_RELOC_HOWTO
379 typedef ATTRIBUTE_UNUSED bfd_vma (*replace_func) (unsigned, int ATTRIBUTE_UNUSED);
381 #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \
383 func = (void *) RELOC_FUNCTION; \
387 get_replace_function (bfd *abfd, unsigned int r_type)
393 #include "elf/arc-reloc.def"
396 if (func == replace_bits24 && bfd_big_endian (abfd))
397 func = replace_bits24_be;
399 return (replace_func) func;
401 #undef ARC_RELOC_HOWTO
403 static reloc_howto_type *
404 arc_elf32_bfd_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
405 bfd_reloc_code_real_type code)
409 for (i = ARRAY_SIZE (arc_reloc_map); i--;)
411 if (arc_reloc_map[i].bfd_reloc_val == code)
412 return arc_elf_howto (arc_reloc_map[i].elf_reloc_val);
418 /* Function to set the ELF flag bits. */
420 arc_elf_set_private_flags (bfd *abfd, flagword flags)
422 elf_elfheader (abfd)->e_flags = flags;
423 elf_flags_init (abfd) = TRUE;
427 /* Print private flags. */
429 arc_elf_print_private_bfd_data (bfd *abfd, void * ptr)
431 FILE *file = (FILE *) ptr;
434 BFD_ASSERT (abfd != NULL && ptr != NULL);
436 /* Print normal ELF private data. */
437 _bfd_elf_print_private_bfd_data (abfd, ptr);
439 flags = elf_elfheader (abfd)->e_flags;
440 fprintf (file, _("private flags = 0x%lx:"), (unsigned long) flags);
442 switch (flags & EF_ARC_MACH_MSK)
444 case EF_ARC_CPU_ARCV2HS : fprintf (file, " -mcpu=ARCv2HS"); break;
445 case EF_ARC_CPU_ARCV2EM : fprintf (file, " -mcpu=ARCv2EM"); break;
446 case E_ARC_MACH_ARC600 : fprintf (file, " -mcpu=ARC600"); break;
447 case E_ARC_MACH_ARC601 : fprintf (file, " -mcpu=ARC601"); break;
448 case E_ARC_MACH_ARC700 : fprintf (file, " -mcpu=ARC700"); break;
450 fprintf (file, "-mcpu=unknown");
454 switch (flags & EF_ARC_OSABI_MSK)
456 case E_ARC_OSABI_ORIG : fprintf (file, " (ABI:legacy)"); break;
457 case E_ARC_OSABI_V2 : fprintf (file, " (ABI:v2)"); break;
458 case E_ARC_OSABI_V3 : fprintf (file, " (ABI:v3)"); break;
459 case E_ARC_OSABI_V4 : fprintf (file, " (ABI:v4)"); break;
461 fprintf (file, " (ABI:unknown)");
469 /* Copy backend specific data from one object module to another. */
472 arc_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
474 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
475 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
478 BFD_ASSERT (!elf_flags_init (obfd)
479 || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);
481 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
482 elf_flags_init (obfd) = TRUE;
484 /* Copy object attributes. */
485 _bfd_elf_copy_obj_attributes (ibfd, obfd);
487 return _bfd_elf_copy_private_bfd_data (ibfd, obfd);
490 static reloc_howto_type *
491 bfd_elf32_bfd_reloc_name_lookup (bfd * abfd ATTRIBUTE_UNUSED,
496 for (i = 0; i < ARRAY_SIZE (elf_arc_howto_table); i++)
497 if (elf_arc_howto_table[i].name != NULL
498 && strcasecmp (elf_arc_howto_table[i].name, r_name) == 0)
499 return arc_elf_howto (i);
504 /* Set the howto pointer for an ARC ELF reloc. */
507 arc_info_to_howto_rel (bfd * abfd,
509 Elf_Internal_Rela * dst)
513 r_type = ELF32_R_TYPE (dst->r_info);
514 if (r_type >= (unsigned int) R_ARC_max)
516 /* xgettext:c-format */
517 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
519 bfd_set_error (bfd_error_bad_value);
523 cache_ptr->howto = arc_elf_howto (r_type);
527 /* Extract CPU features from an NTBS. */
530 arc_extract_features (const char *p)
537 for (i = 0; i < ARRAY_SIZE (bfd_feature_list); i++)
539 char *t = strstr (p, bfd_feature_list[i].attr);
540 unsigned l = strlen (bfd_feature_list[i].attr);
544 r |= bfd_feature_list[i].feature;
550 /* Concatenate two strings. s1 can be NULL but not
554 arc_stralloc (char * s1, const char * s2)
558 /* Only s1 can be null. */
561 p = s1 ? concat (s1, ",", s2, NULL) : (char *)s2;
566 /* Merge ARC object attributes from IBFD into OBFD. Raise an error if
567 there are conflicting attributes. */
570 arc_elf_merge_attributes (bfd *ibfd, struct bfd_link_info *info)
572 bfd *obfd = info->output_bfd;
573 obj_attribute *in_attr;
574 obj_attribute *out_attr;
576 bfd_boolean result = TRUE;
577 const char *sec_name = get_elf_backend_data (ibfd)->obj_attrs_section;
578 char *tagname = NULL;
580 /* Skip the linker stubs file. This preserves previous behavior
581 of accepting unknown attributes in the first input file - but
583 if (ibfd->flags & BFD_LINKER_CREATED)
586 /* Skip any input that hasn't attribute section.
587 This enables to link object files without attribute section with
589 if (bfd_get_section_by_name (ibfd, sec_name) == NULL)
592 if (!elf_known_obj_attributes_proc (obfd)[0].i)
594 /* This is the first object. Copy the attributes. */
595 _bfd_elf_copy_obj_attributes (ibfd, obfd);
597 out_attr = elf_known_obj_attributes_proc (obfd);
599 /* Use the Tag_null value to indicate the attributes have been
606 in_attr = elf_known_obj_attributes_proc (ibfd);
607 out_attr = elf_known_obj_attributes_proc (obfd);
609 for (i = LEAST_KNOWN_OBJ_ATTRIBUTE; i < NUM_KNOWN_OBJ_ATTRIBUTES; i++)
611 /* Merge this attribute with existing attributes. */
614 case Tag_ARC_PCS_config:
615 if (out_attr[i].i == 0)
616 out_attr[i].i = in_attr[i].i;
617 else if (in_attr[i].i != 0 && out_attr[i].i != in_attr[i].i)
619 const char *tagval[] = { "Absent", "Bare-metal/mwdt",
620 "Bare-metal/newlib", "Linux/uclibc",
622 BFD_ASSERT (in_attr[i].i < 5);
623 BFD_ASSERT (out_attr[i].i < 5);
624 /* It's sometimes ok to mix different configs, so this is only
627 (_("warning: %pB: conflicting platform configuration "
629 tagval[in_attr[i].i],
630 tagval[out_attr[i].i]);
634 case Tag_ARC_CPU_base:
635 if (out_attr[i].i == 0)
636 out_attr[i].i = in_attr[i].i;
637 else if (in_attr[i].i != 0 && out_attr[i].i != in_attr[i].i
638 && ((out_attr[i].i + in_attr[i].i) < 6))
640 const char *tagval[] = { "Absent", "ARC6xx", "ARC7xx",
642 BFD_ASSERT (in_attr[i].i < 5);
643 BFD_ASSERT (out_attr[i].i < 5);
644 /* We cannot mix code for different CPUs. */
646 (_("error: %pB: unable to merge CPU base attributes "
649 tagval[in_attr[i].i],
650 tagval[out_attr[i].i]);
656 /* The CPUs may be different, check if we can still mix
657 the objects against the output choosen CPU. */
658 unsigned in_feature = 0;
659 unsigned out_feature = 0;
660 char *p1 = in_attr[Tag_ARC_ISA_config].s;
661 char *p2 = out_attr[Tag_ARC_ISA_config].s;
664 unsigned opcode_map[] = {0, ARC_OPCODE_ARC600, ARC_OPCODE_ARC700,
665 ARC_OPCODE_ARCv2EM, ARC_OPCODE_ARCv2HS};
667 BFD_ASSERT (in_attr[i].i < (sizeof (opcode_map)
668 / sizeof (unsigned)));
669 BFD_ASSERT (out_attr[i].i < (sizeof (opcode_map)
670 / sizeof (unsigned)));
671 cpu_out = opcode_map[out_attr[i].i];
673 in_feature = arc_extract_features (p1);
674 out_feature = arc_extract_features (p2);
676 /* First, check if a feature is compatible with the
677 output object chosen CPU. */
678 for (j = 0; j < ARRAY_SIZE (bfd_feature_list); j++)
679 if (((in_feature | out_feature) & bfd_feature_list[j].feature)
680 && (!(cpu_out & bfd_feature_list[j].cpus)))
683 (_("error: %pB: unable to merge ISA extension attributes "
685 obfd, bfd_feature_list[j].name);
689 /* Second, if we have compatible features with the
690 chosen CPU, check if they are compatible among
692 for (j = 0; j < ARRAY_SIZE (bfd_conflict_list); j++)
693 if (((in_feature | out_feature) & bfd_conflict_list[j])
694 == bfd_conflict_list[j])
697 for (k = 0; k < ARRAY_SIZE (bfd_feature_list); k++)
699 if (in_feature & bfd_feature_list[k].feature
700 & bfd_conflict_list[j])
701 p1 = (char *) bfd_feature_list[k].name;
702 if (out_feature & bfd_feature_list[k].feature
703 & bfd_conflict_list[j])
704 p2 = (char *) bfd_feature_list[k].name;
707 (_("error: %pB: conflicting ISA extension attributes "
713 /* Everithing is alright. */
714 out_feature |= in_feature;
716 for (j = 0; j < ARRAY_SIZE (bfd_feature_list); j++)
717 if (out_feature & bfd_feature_list[j].feature)
718 p1 = arc_stralloc (p1, bfd_feature_list[j].attr);
720 out_attr[Tag_ARC_ISA_config].s =
721 _bfd_elf_attr_strdup (obfd, p1);
724 case Tag_ARC_CPU_variation:
725 case Tag_ARC_ISA_mpy_option:
726 case Tag_ARC_ABI_osver:
727 /* Use the largest value specified. */
728 if (in_attr[i].i > out_attr[i].i)
729 out_attr[i].i = in_attr[i].i;
732 /* The CPU name is given by the vendor, just choose an
733 existing one if missing or different. There are no fail
734 criteria if they different or both missing. */
735 case Tag_ARC_CPU_name:
736 if (!out_attr[i].s && in_attr[i].s)
737 out_attr[i].s = _bfd_elf_attr_strdup (obfd, in_attr[i].s);
740 case Tag_ARC_ABI_rf16:
741 if (out_attr[i].i == 0)
742 out_attr[i].i = in_attr[i].i;
743 else if (out_attr[i].i != in_attr[i].i)
745 /* We cannot mix code with rf16 and without. */
747 (_("error: %pB: cannot mix rf16 with full register set %pB"),
753 case Tag_ARC_ABI_pic:
756 case Tag_ARC_ABI_sda:
760 case Tag_ARC_ABI_tls:
762 const char *tagval[] = { "Absent", "MWDT", "GNU" };
767 BFD_ASSERT (in_attr[i].i < 3);
768 BFD_ASSERT (out_attr[i].i < 3);
769 if (out_attr[i].i == 0)
770 out_attr[i].i = in_attr[i].i;
771 else if (out_attr[i].i != 0 && in_attr[i].i != 0
772 && out_attr[i].i != in_attr[i].i)
775 (_("error: %pB: conflicting attributes %s: %s with %s"),
777 tagval[in_attr[i].i],
778 tagval[out_attr[i].i]);
785 case Tag_ARC_ABI_double_size:
786 tagname = "Double size";
788 case Tag_ARC_ABI_enumsize:
790 tagname = "Enum size";
792 case Tag_ARC_ABI_exceptions:
794 tagname = "ABI exceptions";
796 if (out_attr[i].i == 0)
797 out_attr[i].i = in_attr[i].i;
798 else if (out_attr[i].i != 0 && in_attr[i].i != 0
799 && out_attr[i].i != in_attr[i].i)
802 (_("error: %pB: conflicting attributes %s"),
808 case Tag_ARC_ISA_apex:
809 break; /* Do nothing for APEX attributes. */
811 case Tag_ARC_ISA_config:
812 /* It is handled in Tag_ARC_CPU_base. */
815 case Tag_ARC_ATR_version:
816 if (out_attr[i].i == 0)
817 out_attr[i].i = in_attr[i].i;
822 = result && _bfd_elf_merge_unknown_attribute_low (ibfd, obfd, i);
825 /* If out_attr was copied from in_attr then it won't have a type yet. */
826 if (in_attr[i].type && !out_attr[i].type)
827 out_attr[i].type = in_attr[i].type;
830 /* Merge Tag_compatibility attributes and any common GNU ones. */
831 if (!_bfd_elf_merge_object_attributes (ibfd, info))
834 /* Check for any attributes not known on ARC. */
835 result &= _bfd_elf_merge_unknown_attribute_list (ibfd, obfd);
840 /* Merge backend specific data from an object file to the output
841 object file when linking. */
844 arc_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
846 bfd *obfd = info->output_bfd;
847 unsigned short mach_ibfd;
848 static unsigned short mach_obfd = EM_NONE;
853 /* Check if we have the same endianess. */
854 if (! _bfd_generic_verify_endian_match (ibfd, info))
857 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
858 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
861 /* Collect ELF flags. */
862 in_flags = elf_elfheader (ibfd)->e_flags & EF_ARC_MACH_MSK;
863 out_flags = elf_elfheader (obfd)->e_flags & EF_ARC_MACH_MSK;
865 if (!elf_flags_init (obfd)) /* First call, no flags set. */
867 elf_flags_init (obfd) = TRUE;
868 out_flags = in_flags;
871 if (!arc_elf_merge_attributes (ibfd, info))
874 /* Check to see if the input BFD actually contains any sections. Do
875 not short-circuit dynamic objects; their section list may be
876 emptied by elf_link_add_object_symbols. */
877 if (!(ibfd->flags & DYNAMIC))
879 bfd_boolean null_input_bfd = TRUE;
880 bfd_boolean only_data_sections = TRUE;
882 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
884 if ((bfd_get_section_flags (ibfd, sec)
885 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
886 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
887 only_data_sections = FALSE;
889 null_input_bfd = FALSE;
892 if (null_input_bfd || only_data_sections)
896 /* Complain about various flag/architecture mismatches. */
897 mach_ibfd = elf_elfheader (ibfd)->e_machine;
898 if (mach_obfd == EM_NONE)
900 mach_obfd = mach_ibfd;
904 if (mach_ibfd != mach_obfd)
906 /* xgettext:c-format */
907 _bfd_error_handler (_("error: attempting to link %pB "
908 "with a binary %pB of different architecture"),
912 else if ((in_flags != out_flags)
913 /* If we have object attributes, then we already
914 checked the objects compatibility, skip it. */
915 && !bfd_elf_get_obj_attr_int (ibfd, OBJ_ATTR_PROC,
918 if (in_flags && out_flags)
920 /* Warn if different flags. */
922 /* xgettext:c-format */
923 (_("%pB: uses different e_flags (%#x) fields than "
924 "previous modules (%#x)"),
925 ibfd, in_flags, out_flags);
928 /* MWDT doesnt set the eflags hence make sure we choose the
929 eflags set by gcc. */
930 in_flags = in_flags > out_flags ? in_flags : out_flags;
934 /* Everything is correct; don't change the output flags. */
935 in_flags = out_flags;
939 /* Update the flags. */
940 elf_elfheader (obfd)->e_flags = in_flags;
942 if (bfd_get_mach (obfd) < bfd_get_mach (ibfd))
944 return bfd_set_arch_mach (obfd, bfd_arch_arc, bfd_get_mach (ibfd));
950 /* Return a best guess for the machine number based on the attributes. */
953 bfd_arc_get_mach_from_attributes (bfd * abfd)
955 int arch = bfd_elf_get_obj_attr_int (abfd, OBJ_ATTR_PROC, Tag_ARC_CPU_base);
956 unsigned e_machine = elf_elfheader (abfd)->e_machine;
961 return bfd_mach_arc_arc600;
963 return bfd_mach_arc_arc700;
966 return bfd_mach_arc_arcv2;
970 return (e_machine == EM_ARC_COMPACT)
971 ? bfd_mach_arc_arc700 : bfd_mach_arc_arcv2;
974 /* Set the right machine number for an ARC ELF file. */
976 arc_elf_object_p (bfd * abfd)
978 /* Make sure this is initialised, or you'll have the potential of passing
979 garbage---or misleading values---into the call to
980 bfd_default_set_arch_mach (). */
981 unsigned int mach = bfd_mach_arc_arc700;
982 unsigned long arch = elf_elfheader (abfd)->e_flags & EF_ARC_MACH_MSK;
983 unsigned e_machine = elf_elfheader (abfd)->e_machine;
985 if (e_machine == EM_ARC_COMPACT || e_machine == EM_ARC_COMPACT2)
989 case E_ARC_MACH_ARC600:
990 mach = bfd_mach_arc_arc600;
992 case E_ARC_MACH_ARC601:
993 mach = bfd_mach_arc_arc601;
995 case E_ARC_MACH_ARC700:
996 mach = bfd_mach_arc_arc700;
998 case EF_ARC_CPU_ARCV2HS:
999 case EF_ARC_CPU_ARCV2EM:
1000 mach = bfd_mach_arc_arcv2;
1003 mach = bfd_arc_get_mach_from_attributes (abfd);
1009 if (e_machine == EM_ARC)
1012 (_("error: the ARC4 architecture is no longer supported"));
1018 (_("warning: unset or old architecture flags; "
1019 "use default machine"));
1023 return bfd_default_set_arch_mach (abfd, bfd_arch_arc, mach);
1026 /* The final processing done just before writing out an ARC ELF object file.
1027 This gets the ARC architecture right based on the machine number. */
1030 arc_elf_final_write_processing (bfd * abfd,
1031 bfd_boolean linker ATTRIBUTE_UNUSED)
1034 int osver = bfd_elf_get_obj_attr_int (abfd, OBJ_ATTR_PROC,
1036 flagword e_flags = elf_elfheader (abfd)->e_flags & ~EF_ARC_OSABI_MSK;
1038 switch (bfd_get_mach (abfd))
1040 case bfd_mach_arc_arc600:
1041 emf = EM_ARC_COMPACT;
1043 case bfd_mach_arc_arc601:
1044 emf = EM_ARC_COMPACT;
1046 case bfd_mach_arc_arc700:
1047 emf = EM_ARC_COMPACT;
1049 case bfd_mach_arc_arcv2:
1050 emf = EM_ARC_COMPACT2;
1056 elf_elfheader (abfd)->e_machine = emf;
1058 /* Record whatever is the current syscall ABI version. */
1060 e_flags |= ((osver & 0x0f) << 8);
1062 e_flags |= E_ARC_OSABI_V3;
1064 elf_elfheader (abfd)->e_flags |= e_flags;
1067 #ifdef ARC_ENABLE_DEBUG
1068 #define DEBUG_ARC_RELOC(A) debug_arc_reloc (A)
1071 debug_arc_reloc (struct arc_relocation_data reloc_data)
1073 ARC_DEBUG ("Reloc type=%s, should_relocate = %s\n",
1074 reloc_data.howto->name,
1075 reloc_data.should_relocate ? "true" : "false");
1076 ARC_DEBUG (" offset = 0x%x, addend = 0x%x\n",
1077 (unsigned int) reloc_data.reloc_offset,
1078 (unsigned int) reloc_data.reloc_addend);
1079 ARC_DEBUG (" Symbol:\n");
1080 ARC_DEBUG (" value = 0x%08x\n",
1081 (unsigned int) reloc_data.sym_value);
1082 if (reloc_data.sym_section != NULL)
1084 ARC_DEBUG (" Symbol Section:\n");
1085 ARC_DEBUG (" section name = %s, output_offset 0x%08x",
1086 reloc_data.sym_section->name,
1087 (unsigned int) reloc_data.sym_section->output_offset);
1088 if (reloc_data.sym_section->output_section != NULL)
1089 ARC_DEBUG (", output_section->vma = 0x%08x",
1090 ((unsigned int) reloc_data.sym_section->output_section->vma));
1092 if (reloc_data.sym_section->owner && reloc_data.sym_section->owner->filename)
1093 ARC_DEBUG (" file: %s\n", reloc_data.sym_section->owner->filename);
1097 ARC_DEBUG (" symbol section is NULL\n");
1100 ARC_DEBUG (" Input_section:\n");
1101 if (reloc_data.input_section != NULL)
1103 ARC_DEBUG (" section name = %s, output_offset 0x%08x, output_section->vma = 0x%08x\n",
1104 reloc_data.input_section->name,
1105 (unsigned int) reloc_data.input_section->output_offset,
1106 (unsigned int) reloc_data.input_section->output_section->vma);
1107 ARC_DEBUG (" changed_address = 0x%08x\n",
1108 (unsigned int) (reloc_data.input_section->output_section->vma
1109 + reloc_data.input_section->output_offset
1110 + reloc_data.reloc_offset));
1111 ARC_DEBUG (" file: %s\n", reloc_data.input_section->owner->filename);
1115 ARC_DEBUG (" input section is NULL\n");
1119 #define DEBUG_ARC_RELOC(A)
1120 #endif /* ARC_ENABLE_DEBUG */
1123 middle_endian_convert (bfd_vma insn, bfd_boolean do_it)
1128 = ((insn & 0xffff0000) >> 16)
1129 | ((insn & 0xffff) << 16);
1134 /* This function is called for relocations that are otherwise marked as NOT
1135 requiring overflow checks. In here we perform non-standard checks of
1136 the relocation value. */
1138 static inline bfd_reloc_status_type
1139 arc_special_overflow_checks (const struct arc_relocation_data reloc_data,
1140 bfd_signed_vma relocation,
1141 struct bfd_link_info *info ATTRIBUTE_UNUSED)
1143 switch (reloc_data.howto->type)
1145 case R_ARC_NPS_CMEM16:
1146 if (((relocation >> 16) & 0xffff) != NPS_CMEM_HIGH_VALUE)
1148 if (reloc_data.reloc_addend == 0)
1150 /* xgettext:c-format */
1151 (_("%pB(%pA+%#" PRIx64 "): CMEM relocation to `%s' is invalid, "
1152 "16 MSB should be %#x (value is %#" PRIx64 ")"),
1153 reloc_data.input_section->owner,
1154 reloc_data.input_section,
1155 (uint64_t) reloc_data.reloc_offset,
1156 reloc_data.symbol_name,
1157 NPS_CMEM_HIGH_VALUE,
1158 (uint64_t) relocation);
1161 /* xgettext:c-format */
1162 (_("%pB(%pA+%#" PRIx64 "): CMEM relocation to `%s+%#" PRIx64
1163 "' is invalid, 16 MSB should be %#x (value is %#" PRIx64 ")"),
1164 reloc_data.input_section->owner,
1165 reloc_data.input_section,
1166 (uint64_t) reloc_data.reloc_offset,
1167 reloc_data.symbol_name,
1168 (uint64_t) reloc_data.reloc_addend,
1169 NPS_CMEM_HIGH_VALUE,
1170 (uint64_t) relocation);
1171 return bfd_reloc_overflow;
1179 return bfd_reloc_ok;
1182 #define ME(reloc) (reloc)
1184 #define IS_ME(FORMULA,BFD) ((strstr (FORMULA, "ME") != NULL) \
1185 && (!bfd_big_endian (BFD)))
1187 #define S ((bfd_signed_vma) (reloc_data.sym_value \
1188 + (reloc_data.sym_section->output_section != NULL ? \
1189 (reloc_data.sym_section->output_offset \
1190 + reloc_data.sym_section->output_section->vma) : 0)))
1191 #define L ((bfd_signed_vma) (reloc_data.sym_value \
1192 + (reloc_data.sym_section->output_section != NULL ? \
1193 (reloc_data.sym_section->output_offset \
1194 + reloc_data.sym_section->output_section->vma) : 0)))
1195 #define A (reloc_data.reloc_addend)
1197 #define G (reloc_data.got_offset_value)
1198 #define GOT (reloc_data.got_symbol_vma)
1199 #define GOT_BEGIN (htab->sgot->output_section->vma)
1202 /* P: relative offset to PCL The offset should be to the
1203 current location aligned to 32 bits. */
1204 #define P ((bfd_signed_vma) ( \
1206 (reloc_data.input_section->output_section != NULL ? \
1207 reloc_data.input_section->output_section->vma : 0) \
1208 + reloc_data.input_section->output_offset \
1209 + (reloc_data.reloc_offset - (bitsize >= 32 ? 4 : 0))) \
1211 #define PDATA ((bfd_signed_vma) ( \
1212 (reloc_data.input_section->output_section->vma \
1213 + reloc_data.input_section->output_offset \
1214 + (reloc_data.reloc_offset))))
1215 #define SECTSTART (bfd_signed_vma) (reloc_data.sym_section->output_section->vma \
1216 + reloc_data.sym_section->output_offset)
1217 #define FINAL_SECTSTART \
1218 (bfd_signed_vma) (reloc_data.sym_section->output_section->vma)
1219 #define JLI (bfd_signed_vma) (reloc_data.sym_section->output_section->vma)
1220 #define _SDA_BASE_ (bfd_signed_vma) (reloc_data.sdata_begin_symbol_vma)
1221 #define TLS_REL (bfd_signed_vma) \
1222 ((elf_hash_table (info))->tls_sec->output_section->vma)
1223 #define TLS_TBSS (align_power(TCB_SIZE, \
1224 reloc_data.sym_section->alignment_power))
1228 #ifdef ARC_ENABLE_DEBUG
1229 #define PRINT_DEBUG_RELOC_INFO_BEFORE(FORMULA, TYPE) \
1232 asection *sym_section = reloc_data.sym_section; \
1233 asection *input_section = reloc_data.input_section; \
1234 ARC_DEBUG ("RELOC_TYPE = " TYPE "\n"); \
1235 ARC_DEBUG ("FORMULA = " FORMULA "\n"); \
1236 ARC_DEBUG ("S = %#lx\n", S); \
1237 ARC_DEBUG ("A = %#lx\n", A); \
1238 ARC_DEBUG ("L = %lx\n", L); \
1239 if (sym_section->output_section != NULL) \
1240 ARC_DEBUG ("symbol_section->vma = %#lx\n", \
1241 sym_section->output_section->vma \
1242 + sym_section->output_offset); \
1244 ARC_DEBUG ("symbol_section->vma = NULL\n"); \
1245 if (input_section->output_section != NULL) \
1246 ARC_DEBUG ("symbol_section->vma = %#lx\n", \
1247 input_section->output_section->vma \
1248 + input_section->output_offset); \
1250 ARC_DEBUG ("symbol_section->vma = NULL\n"); \
1251 ARC_DEBUG ("PCL = %#lx\n", P); \
1252 ARC_DEBUG ("P = %#lx\n", P); \
1253 ARC_DEBUG ("G = %#lx\n", G); \
1254 ARC_DEBUG ("SDA_OFFSET = %#lx\n", _SDA_BASE_); \
1255 ARC_DEBUG ("SDA_SET = %d\n", reloc_data.sdata_begin_symbol_vma_set); \
1256 ARC_DEBUG ("GOT_OFFSET = %#lx\n", GOT); \
1257 ARC_DEBUG ("relocation = %#08lx\n", relocation); \
1258 ARC_DEBUG ("before = %#08x\n", (unsigned) insn); \
1259 ARC_DEBUG ("data = %08x (%u) (%d)\n", (unsigned) relocation, \
1260 (unsigned) relocation, (int) relocation); \
1264 #define PRINT_DEBUG_RELOC_INFO_AFTER \
1267 ARC_DEBUG ("after = 0x%08x\n", (unsigned int) insn); \
1273 #define PRINT_DEBUG_RELOC_INFO_BEFORE(...)
1274 #define PRINT_DEBUG_RELOC_INFO_AFTER
1276 #endif /* ARC_ENABLE_DEBUG */
1278 #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \
1281 bfd_signed_vma bitsize ATTRIBUTE_UNUSED = BITSIZE; \
1282 relocation = FORMULA ; \
1283 PRINT_DEBUG_RELOC_INFO_BEFORE (#FORMULA, #TYPE); \
1284 insn = middle_endian_convert (insn, IS_ME (#FORMULA, abfd)); \
1285 insn = (* get_replace_function (abfd, TYPE)) (insn, relocation); \
1286 insn = middle_endian_convert (insn, IS_ME (#FORMULA, abfd)); \
1287 PRINT_DEBUG_RELOC_INFO_AFTER; \
1291 static bfd_reloc_status_type
1292 arc_do_relocation (bfd_byte * contents,
1293 struct arc_relocation_data reloc_data,
1294 struct bfd_link_info *info)
1296 bfd_signed_vma relocation = 0;
1298 bfd_vma orig_insn ATTRIBUTE_UNUSED;
1299 bfd * abfd = reloc_data.input_section->owner;
1300 struct elf_link_hash_table *htab ATTRIBUTE_UNUSED = elf_hash_table (info);
1301 bfd_reloc_status_type flag;
1303 if (!reloc_data.should_relocate)
1304 return bfd_reloc_ok;
1306 switch (reloc_data.howto->size)
1309 insn = arc_bfd_get_32 (abfd,
1310 contents + reloc_data.reloc_offset,
1311 reloc_data.input_section);
1314 insn = arc_bfd_get_16 (abfd,
1315 contents + reloc_data.reloc_offset,
1316 reloc_data.input_section);
1319 insn = arc_bfd_get_8 (abfd,
1320 contents + reloc_data.reloc_offset,
1321 reloc_data.input_section);
1331 switch (reloc_data.howto->type)
1333 #include "elf/arc-reloc.def"
1340 /* Check for relocation overflow. */
1341 if (reloc_data.howto->complain_on_overflow != complain_overflow_dont)
1342 flag = bfd_check_overflow (reloc_data.howto->complain_on_overflow,
1343 reloc_data.howto->bitsize,
1344 reloc_data.howto->rightshift,
1345 bfd_arch_bits_per_address (abfd),
1348 flag = arc_special_overflow_checks (reloc_data, relocation, info);
1350 if (flag != bfd_reloc_ok)
1352 ARC_DEBUG ("Relocation overflows !\n");
1353 DEBUG_ARC_RELOC (reloc_data);
1354 ARC_DEBUG ("Relocation value = signed -> %d, unsigned -> %u"
1355 ", hex -> (0x%08x)\n",
1356 (int) relocation, (unsigned) relocation, (int) relocation);
1361 /* Write updated instruction back to memory. */
1362 switch (reloc_data.howto->size)
1365 arc_bfd_put_32 (abfd, insn,
1366 contents + reloc_data.reloc_offset,
1367 reloc_data.input_section);
1370 arc_bfd_put_16 (abfd, insn,
1371 contents + reloc_data.reloc_offset,
1372 reloc_data.input_section);
1375 arc_bfd_put_8 (abfd, insn,
1376 contents + reloc_data.reloc_offset,
1377 reloc_data.input_section);
1380 ARC_DEBUG ("size = %d\n", reloc_data.howto->size);
1385 return bfd_reloc_ok;
1401 #undef ARC_RELOC_HOWTO
1404 /* Relocate an arc ELF section.
1405 Function : elf_arc_relocate_section
1406 Brief : Relocate an arc section, by handling all the relocations
1407 appearing in that section.
1408 Args : output_bfd : The bfd being written to.
1409 info : Link information.
1410 input_bfd : The input bfd.
1411 input_section : The section being relocated.
1412 contents : contents of the section being relocated.
1413 relocs : List of relocations in the section.
1414 local_syms : is a pointer to the swapped in local symbols.
1415 local_section : is an array giving the section in the input file
1416 corresponding to the st_shndx field of each
1419 elf_arc_relocate_section (bfd * output_bfd,
1420 struct bfd_link_info * info,
1422 asection * input_section,
1423 bfd_byte * contents,
1424 Elf_Internal_Rela * relocs,
1425 Elf_Internal_Sym * local_syms,
1426 asection ** local_sections)
1428 Elf_Internal_Shdr * symtab_hdr;
1429 struct elf_link_hash_entry ** sym_hashes;
1430 Elf_Internal_Rela * rel;
1431 Elf_Internal_Rela * wrel;
1432 Elf_Internal_Rela * relend;
1433 struct elf_link_hash_table * htab = elf_hash_table (info);
1435 symtab_hdr = &((elf_tdata (input_bfd))->symtab_hdr);
1436 sym_hashes = elf_sym_hashes (input_bfd);
1438 rel = wrel = relocs;
1439 relend = relocs + input_section->reloc_count;
1440 for (; rel < relend; wrel++, rel++)
1442 enum elf_arc_reloc_type r_type;
1443 reloc_howto_type * howto;
1444 unsigned long r_symndx;
1445 struct elf_link_hash_entry * h;
1446 Elf_Internal_Sym * sym;
1448 struct elf_link_hash_entry * h2;
1450 bfd_boolean unresolved_reloc = FALSE;
1452 struct arc_relocation_data reloc_data =
1456 .got_offset_value = 0,
1458 .sym_section = NULL,
1460 .input_section = NULL,
1461 .sdata_begin_symbol_vma = 0,
1462 .sdata_begin_symbol_vma_set = FALSE,
1463 .got_symbol_vma = 0,
1464 .should_relocate = FALSE
1467 r_type = ELF32_R_TYPE (rel->r_info);
1469 if (r_type >= (int) R_ARC_max)
1471 bfd_set_error (bfd_error_bad_value);
1474 howto = arc_elf_howto (r_type);
1476 r_symndx = ELF32_R_SYM (rel->r_info);
1478 /* If we are generating another .o file and the symbol in not
1479 local, skip this relocation. */
1480 if (bfd_link_relocatable (info))
1482 /* This is a relocateable link. We don't have to change
1483 anything, unless the reloc is against a section symbol,
1484 in which case we have to adjust according to where the
1485 section symbol winds up in the output section. */
1487 /* Checks if this is a local symbol and thus the reloc
1488 might (will??) be against a section symbol. */
1489 if (r_symndx < symtab_hdr->sh_info)
1491 sym = local_syms + r_symndx;
1492 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
1494 sec = local_sections[r_symndx];
1496 /* For RELA relocs. Just adjust the addend
1497 value in the relocation entry. */
1498 rel->r_addend += sec->output_offset + sym->st_value;
1500 ARC_DEBUG ("local symbols reloc (section=%d %s) seen in %s\n",
1501 (int) r_symndx, local_sections[r_symndx]->name,
1502 __PRETTY_FUNCTION__);
1507 h2 = elf_link_hash_lookup (elf_hash_table (info), "__SDATA_BEGIN__",
1508 FALSE, FALSE, TRUE);
1510 if (!reloc_data.sdata_begin_symbol_vma_set
1511 && h2 != NULL && h2->root.type != bfd_link_hash_undefined
1512 && h2->root.u.def.section->output_section != NULL)
1513 /* TODO: Verify this condition. */
1515 reloc_data.sdata_begin_symbol_vma =
1516 (h2->root.u.def.value
1517 + h2->root.u.def.section->output_section->vma);
1518 reloc_data.sdata_begin_symbol_vma_set = TRUE;
1521 reloc_data.input_section = input_section;
1522 reloc_data.howto = howto;
1523 reloc_data.reloc_offset = rel->r_offset;
1524 reloc_data.reloc_addend = rel->r_addend;
1526 /* This is a final link. */
1531 if (r_symndx < symtab_hdr->sh_info) /* A local symbol. */
1533 sym = local_syms + r_symndx;
1534 sec = local_sections[r_symndx];
1538 bfd_boolean warned, ignored;
1539 bfd_vma relocation ATTRIBUTE_UNUSED;
1541 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1542 r_symndx, symtab_hdr, sym_hashes,
1544 unresolved_reloc, warned, ignored);
1546 /* TODO: This code is repeated from below. We should
1547 clean it and remove duplications.
1548 Sec is used check for discarded sections.
1549 Need to redesign code below. */
1551 /* Get the symbol's entry in the symtab. */
1552 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1554 while (h->root.type == bfd_link_hash_indirect
1555 || h->root.type == bfd_link_hash_warning)
1556 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1558 /* If we have encountered a definition for this symbol. */
1559 if (h->root.type == bfd_link_hash_defined
1560 || h->root.type == bfd_link_hash_defweak)
1562 reloc_data.sym_value = h->root.u.def.value;
1563 sec = h->root.u.def.section;
1567 /* Clean relocs for symbols in discarded sections. */
1568 if (sec != NULL && discarded_section (sec))
1570 _bfd_clear_contents (howto, input_bfd, input_section,
1571 contents, rel->r_offset);
1575 /* For ld -r, remove relocations in debug sections against
1576 sections defined in discarded sections. Not done for
1577 eh_frame editing code expects to be present. */
1578 if (bfd_link_relocatable (info)
1579 && (input_section->flags & SEC_DEBUGGING))
1585 if (bfd_link_relocatable (info))
1592 if (r_symndx < symtab_hdr->sh_info) /* A local symbol. */
1594 reloc_data.sym_value = sym->st_value;
1595 reloc_data.sym_section = sec;
1596 reloc_data.symbol_name =
1597 bfd_elf_string_from_elf_section (input_bfd,
1598 symtab_hdr->sh_link,
1601 /* Mergeable section handling. */
1602 if ((sec->flags & SEC_MERGE)
1603 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
1607 rel->r_addend = _bfd_elf_rel_local_sym (output_bfd, sym,
1608 &msec, rel->r_addend);
1609 rel->r_addend -= (sec->output_section->vma
1610 + sec->output_offset
1612 rel->r_addend += msec->output_section->vma + msec->output_offset;
1614 reloc_data.reloc_addend = rel->r_addend;
1617 BFD_ASSERT (htab->sgot != NULL || !is_reloc_for_GOT (howto));
1618 if (htab->sgot != NULL)
1619 reloc_data.got_symbol_vma = htab->sgot->output_section->vma
1620 + htab->sgot->output_offset;
1622 reloc_data.should_relocate = TRUE;
1624 else /* Global symbol. */
1626 /* FIXME: We should use the RELOC_FOR_GLOBAL_SYMBOL macro
1627 (defined in elf-bfd.h) here. */
1629 /* Get the symbol's entry in the symtab. */
1630 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1632 while (h->root.type == bfd_link_hash_indirect
1633 || h->root.type == bfd_link_hash_warning)
1635 struct elf_arc_link_hash_entry *ah_old =
1636 (struct elf_arc_link_hash_entry *) h;
1637 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1638 struct elf_arc_link_hash_entry *ah =
1639 (struct elf_arc_link_hash_entry *) h;
1641 if (ah->got_ents == 0 && ah_old->got_ents != ah->got_ents)
1642 ah->got_ents = ah_old->got_ents;
1645 /* TODO: Need to validate what was the intention. */
1646 /* BFD_ASSERT ((h->dynindx == -1) || (h->forced_local != 0)); */
1647 reloc_data.symbol_name = h->root.root.string;
1649 /* If we have encountered a definition for this symbol. */
1650 if (h->root.type == bfd_link_hash_defined
1651 || h->root.type == bfd_link_hash_defweak)
1653 reloc_data.sym_value = h->root.u.def.value;
1654 reloc_data.sym_section = h->root.u.def.section;
1656 reloc_data.should_relocate = TRUE;
1658 if (is_reloc_for_GOT (howto) && !bfd_link_pic (info))
1660 struct elf_arc_link_hash_entry *ah =
1661 (struct elf_arc_link_hash_entry *) h;
1662 /* TODO: Change it to use arc_do_relocation with
1663 ARC_32 reloc. Try to use ADD_RELA macro. */
1664 bfd_vma relocation =
1665 reloc_data.sym_value + reloc_data.reloc_addend
1666 + (reloc_data.sym_section->output_section != NULL ?
1667 (reloc_data.sym_section->output_offset
1668 + reloc_data.sym_section->output_section->vma)
1671 BFD_ASSERT (ah->got_ents);
1672 bfd_vma got_offset = ah->got_ents->offset;
1673 bfd_put_32 (output_bfd, relocation,
1674 htab->sgot->contents + got_offset);
1676 if (is_reloc_for_PLT (howto) && h->plt.offset != (bfd_vma) -1)
1678 /* TODO: This is repeated up here. */
1679 reloc_data.sym_value = h->plt.offset;
1680 reloc_data.sym_section = htab->splt;
1683 else if (h->root.type == bfd_link_hash_undefweak)
1685 /* Is weak symbol and has no definition. */
1686 if (is_reloc_for_GOT (howto))
1688 reloc_data.sym_value = h->root.u.def.value;
1689 reloc_data.sym_section = htab->sgot;
1690 reloc_data.should_relocate = TRUE;
1692 else if (is_reloc_for_PLT (howto)
1693 && h->plt.offset != (bfd_vma) -1)
1695 /* TODO: This is repeated up here. */
1696 reloc_data.sym_value = h->plt.offset;
1697 reloc_data.sym_section = htab->splt;
1698 reloc_data.should_relocate = TRUE;
1705 if (is_reloc_for_GOT (howto))
1707 reloc_data.sym_value = h->root.u.def.value;
1708 reloc_data.sym_section = htab->sgot;
1710 reloc_data.should_relocate = TRUE;
1712 else if (is_reloc_for_PLT (howto))
1714 /* Fail if it is linking for PIE and the symbol is
1716 if (bfd_link_executable (info))
1717 (*info->callbacks->undefined_symbol)
1718 (info, h->root.root.string, input_bfd, input_section,
1719 rel->r_offset, TRUE);
1720 reloc_data.sym_value = h->plt.offset;
1721 reloc_data.sym_section = htab->splt;
1723 reloc_data.should_relocate = TRUE;
1725 else if (!bfd_link_pic (info) || bfd_link_executable (info))
1726 (*info->callbacks->undefined_symbol)
1727 (info, h->root.root.string, input_bfd, input_section,
1728 rel->r_offset, TRUE);
1731 BFD_ASSERT (htab->sgot != NULL || !is_reloc_for_GOT (howto));
1732 if (htab->sgot != NULL)
1733 reloc_data.got_symbol_vma = htab->sgot->output_section->vma
1734 + htab->sgot->output_offset;
1737 if ((is_reloc_for_GOT (howto)
1738 || is_reloc_for_TLS (howto)))
1740 reloc_data.should_relocate = TRUE;
1742 struct got_entry **list
1743 = get_got_entry_list_for_symbol (output_bfd, r_symndx, h);
1745 reloc_data.got_offset_value
1746 = relocate_fix_got_relocs_for_got_info (list,
1747 tls_type_for_reloc (howto),
1758 create_got_dynrelocs_for_single_entry (
1759 got_entry_for_type (list,
1760 arc_got_entry_type_for_reloc (howto)),
1761 output_bfd, info, NULL);
1766 #define IS_ARC_PCREL_TYPE(TYPE) \
1767 ( (TYPE == R_ARC_PC32) \
1768 || (TYPE == R_ARC_32_PCREL))
1775 case R_ARC_32_PCREL:
1776 if (bfd_link_pic (info)
1777 && (!IS_ARC_PCREL_TYPE (r_type)
1781 && (!info->symbolic || !h->def_regular))))
1783 Elf_Internal_Rela outrel;
1785 bfd_boolean skip = FALSE;
1786 bfd_boolean relocate = FALSE;
1787 asection *sreloc = _bfd_elf_get_dynamic_reloc_section
1788 (input_bfd, input_section,
1791 BFD_ASSERT (sreloc != NULL);
1793 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
1798 if (outrel.r_offset == (bfd_vma) -1)
1801 outrel.r_addend = rel->r_addend;
1802 outrel.r_offset += (input_section->output_section->vma
1803 + input_section->output_offset);
1807 memset (&outrel, 0, sizeof outrel);
1812 && (IS_ARC_PCREL_TYPE (r_type)
1813 || !(bfd_link_executable (info)
1814 || SYMBOLIC_BIND (info, h))
1815 || ! h->def_regular))
1817 BFD_ASSERT (h != NULL);
1818 if ((input_section->flags & SEC_ALLOC) != 0)
1823 BFD_ASSERT (h->dynindx != -1);
1824 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1828 /* Handle local symbols, they either do not have a
1829 global hash table entry (h == NULL), or are
1830 forced local due to a version script
1831 (h->forced_local), or the third condition is
1832 legacy, it appears to say something like, for
1833 links where we are pre-binding the symbols, or
1834 there's not an entry for this symbol in the
1835 dynamic symbol table, and it's a regular symbol
1836 not defined in a shared object, then treat the
1837 symbol as local, resolve it now. */
1839 /* outrel.r_addend = 0; */
1840 outrel.r_info = ELF32_R_INFO (0, R_ARC_RELATIVE);
1843 BFD_ASSERT (sreloc->contents != 0);
1845 loc = sreloc->contents;
1846 loc += sreloc->reloc_count * sizeof (Elf32_External_Rela);
1847 sreloc->reloc_count += 1;
1849 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1859 if (is_reloc_SDA_relative (howto)
1860 && !reloc_data.sdata_begin_symbol_vma_set)
1863 ("error: linker symbol __SDATA_BEGIN__ not found");
1864 bfd_set_error (bfd_error_bad_value);
1868 DEBUG_ARC_RELOC (reloc_data);
1870 /* Make sure we have with a dynamic linker. In case of GOT and PLT
1871 the sym_section should point to .got or .plt respectively. */
1872 if ((is_reloc_for_GOT (howto) || is_reloc_for_PLT (howto))
1873 && reloc_data.sym_section == NULL)
1876 (_("GOT and PLT relocations cannot be fixed with a non dynamic linker"));
1877 bfd_set_error (bfd_error_bad_value);
1882 switch (arc_do_relocation (contents, reloc_data, info))
1885 continue; /* The reloc processing loop. */
1887 case bfd_reloc_overflow:
1888 (*info->callbacks->reloc_overflow)
1889 (info, (h ? &h->root : NULL), reloc_data.symbol_name, howto->name, (bfd_vma) 0,
1890 input_bfd, input_section, rel->r_offset);
1893 case bfd_reloc_undefined:
1894 (*info->callbacks->undefined_symbol)
1895 (info, reloc_data.symbol_name, input_bfd, input_section, rel->r_offset, TRUE);
1898 case bfd_reloc_other:
1899 /* xgettext:c-format */
1900 msg = _("%pB(%pA): warning: unaligned access to symbol '%s' in the small data area");
1903 case bfd_reloc_outofrange:
1904 /* xgettext:c-format */
1905 msg = _("%pB(%pA): internal error: out of range error");
1908 case bfd_reloc_notsupported:
1909 /* xgettext:c-format */
1910 msg = _("%pB(%pA): internal error: unsupported relocation error");
1913 case bfd_reloc_dangerous:
1914 /* xgettext:c-format */
1915 msg = _("%pB(%pA): internal error: dangerous relocation");
1919 /* xgettext:c-format */
1920 msg = _("%pB(%pA): internal error: unknown error");
1925 _bfd_error_handler (msg, input_bfd, input_section, reloc_data.symbol_name);
1932 #define elf_arc_hash_table(p) \
1933 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
1934 == ARC_ELF_DATA ? ((struct elf_arc_link_hash_table *) ((p)->hash)) : NULL)
1937 elf_arc_check_relocs (bfd * abfd,
1938 struct bfd_link_info * info,
1940 const Elf_Internal_Rela * relocs)
1942 Elf_Internal_Shdr * symtab_hdr;
1943 struct elf_link_hash_entry ** sym_hashes;
1944 const Elf_Internal_Rela * rel;
1945 const Elf_Internal_Rela * rel_end;
1947 asection * sreloc = NULL;
1948 struct elf_link_hash_table * htab = elf_hash_table (info);
1950 if (bfd_link_relocatable (info))
1953 if (htab->dynobj == NULL)
1954 htab->dynobj = abfd;
1956 dynobj = (elf_hash_table (info))->dynobj;
1957 symtab_hdr = &((elf_tdata (abfd))->symtab_hdr);
1958 sym_hashes = elf_sym_hashes (abfd);
1960 rel_end = relocs + sec->reloc_count;
1961 for (rel = relocs; rel < rel_end; rel++)
1963 enum elf_arc_reloc_type r_type;
1964 reloc_howto_type *howto;
1965 unsigned long r_symndx;
1966 struct elf_link_hash_entry *h;
1968 r_type = ELF32_R_TYPE (rel->r_info);
1970 if (r_type >= (int) R_ARC_max)
1972 bfd_set_error (bfd_error_bad_value);
1975 howto = arc_elf_howto (r_type);
1977 /* Load symbol information. */
1978 r_symndx = ELF32_R_SYM (rel->r_info);
1979 if (r_symndx < symtab_hdr->sh_info) /* Is a local symbol. */
1981 else /* Global one. */
1983 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1984 while (h->root.type == bfd_link_hash_indirect
1985 || h->root.type == bfd_link_hash_warning)
1986 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1994 /* During shared library creation, these relocs should not
1995 appear in a shared library (as memory will be read only
1996 and the dynamic linker can not resolve these. However
1997 the error should not occur for e.g. debugging or
1998 non-readonly sections. */
2000 && (bfd_link_dll (info) && !bfd_link_pie (info))
2001 && (sec->flags & SEC_ALLOC) != 0
2002 && (sec->flags & SEC_READONLY) != 0
2003 && ((sec->flags & SEC_CODE) != 0
2004 || (sec->flags & SEC_DEBUGGING) != 0))
2008 name = h->root.root.string;
2010 /* bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); */
2013 /* xgettext:c-format */
2014 (_("%pB: relocation %s against `%s' can not be used"
2015 " when making a shared object; recompile with -fPIC"),
2017 arc_elf_howto (r_type)->name,
2019 bfd_set_error (bfd_error_bad_value);
2023 /* In some cases we are not setting the 'non_got_ref'
2024 flag, even though the relocations don't require a GOT
2025 access. We should extend the testing in this area to
2026 ensure that no significant cases are being missed. */
2031 case R_ARC_32_PCREL:
2032 if ((bfd_link_pic (info))
2033 && ((r_type != R_ARC_PC32 && r_type != R_ARC_32_PCREL)
2035 && (!info->symbolic || !h->def_regular))))
2040 && ! htab->dynamic_sections_created
2041 && ! _bfd_elf_link_create_dynamic_sections (abfd, info))
2043 sreloc = _bfd_elf_make_dynamic_reloc_section (sec, dynobj,
2051 sreloc->size += sizeof (Elf32_External_Rela);
2058 if (is_reloc_for_PLT (howto))
2063 if (h->forced_local == 0)
2067 /* Add info to the symbol got_entry_list. */
2068 if (is_reloc_for_GOT (howto)
2069 || is_reloc_for_TLS (howto))
2071 if (! _bfd_elf_create_got_section (dynobj, info))
2074 arc_fill_got_info_for_reloc (
2075 arc_got_entry_type_for_reloc (howto),
2076 get_got_entry_list_for_symbol (abfd, r_symndx, h),
2085 #define ELF_DYNAMIC_INTERPRETER "/sbin/ld-uClibc.so"
2087 static struct plt_version_t *
2088 arc_get_plt_version (struct bfd_link_info *info)
2092 for (i = 0; i < 1; i++)
2094 ARC_DEBUG ("%d: size1 = %d, size2 = %d\n", i,
2095 (int) plt_versions[i].entry_size,
2096 (int) plt_versions[i].elem_size);
2099 if (bfd_get_mach (info->output_bfd) == bfd_mach_arc_arcv2)
2101 if (bfd_link_pic (info))
2102 return &(plt_versions[ELF_ARCV2_PIC]);
2104 return &(plt_versions[ELF_ARCV2_ABS]);
2108 if (bfd_link_pic (info))
2109 return &(plt_versions[ELF_ARC_PIC]);
2111 return &(plt_versions[ELF_ARC_ABS]);
2116 add_symbol_to_plt (struct bfd_link_info *info)
2118 struct elf_link_hash_table *htab = elf_hash_table (info);
2121 struct plt_version_t *plt_data = arc_get_plt_version (info);
2123 /* If this is the first .plt entry, make room for the special first
2125 if (htab->splt->size == 0)
2126 htab->splt->size += plt_data->entry_size;
2128 ret = htab->splt->size;
2130 htab->splt->size += plt_data->elem_size;
2131 ARC_DEBUG ("PLT_SIZE = %d\n", (int) htab->splt->size);
2133 htab->sgotplt->size += 4;
2134 htab->srelplt->size += sizeof (Elf32_External_Rela);
2139 #define PLT_DO_RELOCS_FOR_ENTRY(ABFD, DS, RELOCS) \
2140 plt_do_relocs_for_symbol (ABFD, DS, RELOCS, 0, 0)
2143 plt_do_relocs_for_symbol (bfd *abfd,
2144 struct elf_link_hash_table *htab,
2145 const struct plt_reloc *reloc,
2147 bfd_vma symbol_got_offset)
2149 while (SYM_ONLY (reloc->symbol) != LAST_RELOC)
2151 bfd_vma relocation = 0;
2153 switch (SYM_ONLY (reloc->symbol))
2157 = htab->sgotplt->output_section->vma
2158 + htab->sgotplt->output_offset + symbol_got_offset;
2161 relocation += reloc->addend;
2163 if (IS_RELATIVE (reloc->symbol))
2165 bfd_vma reloc_offset = reloc->offset;
2166 reloc_offset -= (IS_INSN_32 (reloc->symbol)) ? 4 : 0;
2167 reloc_offset -= (IS_INSN_24 (reloc->symbol)) ? 2 : 0;
2169 relocation -= htab->splt->output_section->vma
2170 + htab->splt->output_offset
2171 + plt_offset + reloc_offset;
2174 /* TODO: being ME is not a property of the relocation but of the
2175 section of which is applying the relocation. */
2176 if (IS_MIDDLE_ENDIAN (reloc->symbol) && !bfd_big_endian (abfd))
2179 = ((relocation & 0xffff0000) >> 16)
2180 | ((relocation & 0xffff) << 16);
2183 switch (reloc->size)
2186 bfd_put_32 (htab->splt->output_section->owner,
2188 htab->splt->contents + plt_offset + reloc->offset);
2192 reloc = &(reloc[1]); /* Jump to next relocation. */
2197 relocate_plt_for_symbol (bfd *output_bfd,
2198 struct bfd_link_info *info,
2199 struct elf_link_hash_entry *h)
2201 struct plt_version_t *plt_data = arc_get_plt_version (info);
2202 struct elf_link_hash_table *htab = elf_hash_table (info);
2204 bfd_vma plt_index = (h->plt.offset - plt_data->entry_size)
2205 / plt_data->elem_size;
2206 bfd_vma got_offset = (plt_index + 3) * 4;
2208 ARC_DEBUG ("arc_info: PLT_OFFSET = %#lx, PLT_ENTRY_VMA = %#lx, \
2209 GOT_ENTRY_OFFSET = %#lx, GOT_ENTRY_VMA = %#lx, for symbol %s\n",
2210 (long) h->plt.offset,
2211 (long) (htab->splt->output_section->vma
2212 + htab->splt->output_offset
2215 (long) (htab->sgotplt->output_section->vma
2216 + htab->sgotplt->output_offset
2218 h->root.root.string);
2222 uint16_t *ptr = (uint16_t *) plt_data->elem;
2224 for (i = 0; i < plt_data->elem_size/2; i++)
2226 uint16_t data = ptr[i];
2227 bfd_put_16 (output_bfd,
2229 htab->splt->contents + h->plt.offset + (i*2));
2233 plt_do_relocs_for_symbol (output_bfd, htab,
2234 plt_data->elem_relocs,
2238 /* Fill in the entry in the global offset table. */
2239 bfd_put_32 (output_bfd,
2240 (bfd_vma) (htab->splt->output_section->vma
2241 + htab->splt->output_offset),
2242 htab->sgotplt->contents + got_offset);
2244 /* TODO: Fill in the entry in the .rela.plt section. */
2246 Elf_Internal_Rela rel;
2249 rel.r_offset = (htab->sgotplt->output_section->vma
2250 + htab->sgotplt->output_offset
2254 BFD_ASSERT (h->dynindx != -1);
2255 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARC_JMP_SLOT);
2257 loc = htab->srelplt->contents;
2258 loc += plt_index * sizeof (Elf32_External_Rela); /* relA */
2259 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
2264 relocate_plt_for_entry (bfd *abfd,
2265 struct bfd_link_info *info)
2267 struct plt_version_t *plt_data = arc_get_plt_version (info);
2268 struct elf_link_hash_table *htab = elf_hash_table (info);
2272 uint16_t *ptr = (uint16_t *) plt_data->entry;
2273 for (i = 0; i < plt_data->entry_size/2; i++)
2275 uint16_t data = ptr[i];
2278 htab->splt->contents + (i*2));
2281 PLT_DO_RELOCS_FOR_ENTRY (abfd, htab, plt_data->entry_relocs);
2284 /* Desc : Adjust a symbol defined by a dynamic object and referenced
2285 by a regular object. The current definition is in some section of
2286 the dynamic object, but we're not including those sections. We
2287 have to change the definition to something the rest of the link can
2291 elf_arc_adjust_dynamic_symbol (struct bfd_link_info *info,
2292 struct elf_link_hash_entry *h)
2295 bfd *dynobj = (elf_hash_table (info))->dynobj;
2296 struct elf_link_hash_table *htab = elf_hash_table (info);
2298 if (h->type == STT_FUNC
2299 || h->type == STT_GNU_IFUNC
2300 || h->needs_plt == 1)
2302 if (!bfd_link_pic (info) && !h->def_dynamic && !h->ref_dynamic)
2304 /* This case can occur if we saw a PLT32 reloc in an input
2305 file, but the symbol was never referred to by a dynamic
2306 object. In such a case, we don't actually need to build
2307 a procedure linkage table, and we can just do a PC32
2309 BFD_ASSERT (h->needs_plt);
2313 /* Make sure this symbol is output as a dynamic symbol. */
2314 if (h->dynindx == -1 && !h->forced_local
2315 && !bfd_elf_link_record_dynamic_symbol (info, h))
2318 if (bfd_link_pic (info)
2319 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2321 bfd_vma loc = add_symbol_to_plt (info);
2323 if (bfd_link_executable (info) && !h->def_regular)
2325 h->root.u.def.section = htab->splt;
2326 h->root.u.def.value = loc;
2328 h->plt.offset = loc;
2332 h->plt.offset = (bfd_vma) -1;
2338 /* If this is a weak symbol, and there is a real definition, the
2339 processor independent code will have arranged for us to see the
2340 real definition first, and we can just use the same value. */
2341 if (h->is_weakalias)
2343 struct elf_link_hash_entry *def = weakdef (h);
2344 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
2345 h->root.u.def.section = def->root.u.def.section;
2346 h->root.u.def.value = def->root.u.def.value;
2350 /* This is a reference to a symbol defined by a dynamic object which
2351 is not a function. */
2353 /* If we are creating a shared library, we must presume that the
2354 only references to the symbol are via the global offset table.
2355 For such cases we need not do anything here; the relocations will
2356 be handled correctly by relocate_section. */
2357 if (!bfd_link_executable (info))
2360 /* If there are no non-GOT references, we do not need a copy
2362 if (!h->non_got_ref)
2365 /* If -z nocopyreloc was given, we won't generate them either. */
2366 if (info->nocopyreloc)
2372 /* We must allocate the symbol in our .dynbss section, which will
2373 become part of the .bss section of the executable. There will be
2374 an entry for this symbol in the .dynsym section. The dynamic
2375 object will contain position independent code, so all references
2376 from the dynamic object to this symbol will go through the global
2377 offset table. The dynamic linker will use the .dynsym entry to
2378 determine the address it must put in the global offset table, so
2379 both the dynamic object and the regular object will refer to the
2380 same memory location for the variable. */
2385 /* We must generate a R_ARC_COPY reloc to tell the dynamic linker to
2386 copy the initial value out of the dynamic object and into the
2387 runtime process image. We need to remember the offset into the
2388 .rela.bss section we are going to use. */
2389 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2391 struct elf_arc_link_hash_table *arc_htab = elf_arc_hash_table (info);
2393 BFD_ASSERT (arc_htab->elf.srelbss != NULL);
2394 arc_htab->elf.srelbss->size += sizeof (Elf32_External_Rela);
2398 /* TODO: Move this also to arc_hash_table. */
2399 s = bfd_get_section_by_name (dynobj, ".dynbss");
2400 BFD_ASSERT (s != NULL);
2402 return _bfd_elf_adjust_dynamic_copy (info, h, s);
2405 /* Function : elf_arc_finish_dynamic_symbol
2406 Brief : Finish up dynamic symbol handling. We set the
2407 contents of various dynamic sections here.
2412 Returns : True/False as the return status. */
2415 elf_arc_finish_dynamic_symbol (bfd * output_bfd,
2416 struct bfd_link_info *info,
2417 struct elf_link_hash_entry *h,
2418 Elf_Internal_Sym * sym)
2420 if (h->plt.offset != (bfd_vma) -1)
2422 relocate_plt_for_symbol (output_bfd, info, h);
2424 if (!h->def_regular)
2426 /* Mark the symbol as undefined, rather than as defined in
2427 the .plt section. Leave the value alone. */
2428 sym->st_shndx = SHN_UNDEF;
2433 /* This function traverses list of GOT entries and
2434 create respective dynamic relocs. */
2435 /* TODO: Make function to get list and not access the list directly. */
2436 /* TODO: Move function to relocate_section create this relocs eagerly. */
2437 struct elf_arc_link_hash_entry *ah =
2438 (struct elf_arc_link_hash_entry *) h;
2439 create_got_dynrelocs_for_got_info (&ah->got_ents,
2446 struct elf_arc_link_hash_table *arc_htab = elf_arc_hash_table (info);
2448 if (arc_htab == NULL)
2451 if (h->dynindx == -1
2452 || (h->root.type != bfd_link_hash_defined
2453 && h->root.type != bfd_link_hash_defweak)
2454 || arc_htab->elf.srelbss == NULL)
2457 bfd_vma rel_offset = (h->root.u.def.value
2458 + h->root.u.def.section->output_section->vma
2459 + h->root.u.def.section->output_offset);
2461 bfd_byte * loc = arc_htab->elf.srelbss->contents
2462 + (arc_htab->elf.srelbss->reloc_count * sizeof (Elf32_External_Rela));
2463 arc_htab->elf.srelbss->reloc_count++;
2465 Elf_Internal_Rela rel;
2467 rel.r_offset = rel_offset;
2469 BFD_ASSERT (h->dynindx != -1);
2470 rel.r_info = ELF32_R_INFO (h->dynindx, R_ARC_COPY);
2472 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
2475 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
2476 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
2477 || strcmp (h->root.root.string, "__DYNAMIC") == 0
2478 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2479 sym->st_shndx = SHN_ABS;
2484 #define GET_SYMBOL_OR_SECTION(TAG, SYMBOL, SECTION) \
2486 if (SYMBOL != NULL) \
2487 h = elf_link_hash_lookup (elf_hash_table (info), \
2488 SYMBOL, FALSE, FALSE, TRUE); \
2489 else if (SECTION != NULL) \
2490 s = bfd_get_linker_section (dynobj, SECTION); \
2493 /* Function : elf_arc_finish_dynamic_sections
2494 Brief : Finish up the dynamic sections handling.
2499 Returns : True/False as the return status. */
2502 elf_arc_finish_dynamic_sections (bfd * output_bfd,
2503 struct bfd_link_info *info)
2505 struct elf_link_hash_table *htab = elf_hash_table (info);
2506 bfd *dynobj = (elf_hash_table (info))->dynobj;
2507 asection *sdyn = bfd_get_linker_section (dynobj, ".dynamic");
2511 Elf32_External_Dyn *dyncon, *dynconend;
2513 dyncon = (Elf32_External_Dyn *) sdyn->contents;
2515 = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
2516 for (; dyncon < dynconend; dyncon++)
2518 Elf_Internal_Dyn internal_dyn;
2519 bfd_boolean do_it = FALSE;
2521 struct elf_link_hash_entry *h = NULL;
2524 bfd_elf32_swap_dyn_in (dynobj, dyncon, &internal_dyn);
2526 switch (internal_dyn.d_tag)
2528 GET_SYMBOL_OR_SECTION (DT_INIT, info->init_function, NULL)
2529 GET_SYMBOL_OR_SECTION (DT_FINI, info->fini_function, NULL)
2530 GET_SYMBOL_OR_SECTION (DT_PLTGOT, NULL, ".plt")
2531 GET_SYMBOL_OR_SECTION (DT_JMPREL, NULL, ".rela.plt")
2532 GET_SYMBOL_OR_SECTION (DT_PLTRELSZ, NULL, ".rela.plt")
2533 GET_SYMBOL_OR_SECTION (DT_VERSYM, NULL, ".gnu.version")
2534 GET_SYMBOL_OR_SECTION (DT_VERDEF, NULL, ".gnu.version_d")
2535 GET_SYMBOL_OR_SECTION (DT_VERNEED, NULL, ".gnu.version_r")
2540 /* In case the dynamic symbols should be updated with a symbol. */
2542 && (h->root.type == bfd_link_hash_defined
2543 || h->root.type == bfd_link_hash_defweak))
2547 internal_dyn.d_un.d_val = h->root.u.def.value;
2548 asec_ptr = h->root.u.def.section;
2549 if (asec_ptr->output_section != NULL)
2551 internal_dyn.d_un.d_val +=
2552 (asec_ptr->output_section->vma
2553 + asec_ptr->output_offset);
2557 /* The symbol is imported from another shared
2558 library and does not apply to this one. */
2559 internal_dyn.d_un.d_val = 0;
2563 else if (s != NULL) /* With a section information. */
2565 switch (internal_dyn.d_tag)
2572 internal_dyn.d_un.d_ptr = (s->output_section->vma
2573 + s->output_offset);
2578 internal_dyn.d_un.d_val = s->size;
2588 bfd_elf32_swap_dyn_out (output_bfd, &internal_dyn, dyncon);
2591 if (htab->splt->size > 0)
2593 relocate_plt_for_entry (output_bfd, info);
2596 /* TODO: Validate this. */
2597 if (htab->srelplt->output_section != bfd_abs_section_ptr)
2598 elf_section_data (htab->srelplt->output_section)
2599 ->this_hdr.sh_entsize = 12;
2602 /* Fill in the first three entries in the global offset table. */
2605 struct elf_link_hash_entry *h;
2606 h = elf_link_hash_lookup (elf_hash_table (info), "_GLOBAL_OFFSET_TABLE_",
2607 FALSE, FALSE, TRUE);
2609 if (h != NULL && h->root.type != bfd_link_hash_undefined
2610 && h->root.u.def.section != NULL)
2612 asection *sec = h->root.u.def.section;
2615 bfd_put_32 (output_bfd, (bfd_vma) 0,
2618 bfd_put_32 (output_bfd,
2619 sdyn->output_section->vma + sdyn->output_offset,
2621 bfd_put_32 (output_bfd, (bfd_vma) 0, sec->contents + 4);
2622 bfd_put_32 (output_bfd, (bfd_vma) 0, sec->contents + 8);
2629 #define ADD_DYNAMIC_SYMBOL(NAME, TAG) \
2630 h = elf_link_hash_lookup (elf_hash_table (info), \
2631 NAME, FALSE, FALSE, FALSE); \
2632 if ((h != NULL && (h->ref_regular || h->def_regular))) \
2633 if (! _bfd_elf_add_dynamic_entry (info, TAG, 0)) \
2636 /* Set the sizes of the dynamic sections. */
2638 elf_arc_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2639 struct bfd_link_info *info)
2643 bfd_boolean relocs_exist = FALSE;
2644 bfd_boolean reltext_exist = FALSE;
2645 struct elf_link_hash_table *htab = elf_hash_table (info);
2647 dynobj = htab->dynobj;
2648 BFD_ASSERT (dynobj != NULL);
2650 if (htab->dynamic_sections_created)
2652 struct elf_link_hash_entry *h;
2654 /* Set the contents of the .interp section to the
2656 if (bfd_link_executable (info) && !info->nointerp)
2658 s = bfd_get_section_by_name (dynobj, ".interp");
2659 BFD_ASSERT (s != NULL);
2660 s->size = sizeof (ELF_DYNAMIC_INTERPRETER);
2661 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2664 /* Add some entries to the .dynamic section. We fill in some of
2665 the values later, in elf_bfd_final_link, but we must add the
2666 entries now so that we know the final size of the .dynamic
2667 section. Checking if the .init section is present. We also
2668 create DT_INIT and DT_FINI entries if the init_str has been
2669 changed by the user. */
2670 ADD_DYNAMIC_SYMBOL (info->init_function, DT_INIT);
2671 ADD_DYNAMIC_SYMBOL (info->fini_function, DT_FINI);
2675 /* We may have created entries in the .rela.got section.
2676 However, if we are not creating the dynamic sections, we will
2677 not actually use these entries. Reset the size of .rela.got,
2678 which will cause it to get stripped from the output file
2680 if (htab->srelgot != NULL)
2681 htab->srelgot->size = 0;
2684 for (s = dynobj->sections; s != NULL; s = s->next)
2686 if ((s->flags & SEC_LINKER_CREATED) == 0)
2691 || s == htab->sgotplt
2692 || s == htab->sdynbss)
2694 /* Strip this section if we don't need it. */
2696 else if (strncmp (s->name, ".rela", 5) == 0)
2698 if (s->size != 0 && s != htab->srelplt)
2702 const char *name = s->name + 5;
2704 for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next)
2705 if (bfd_get_flavour (ibfd) == bfd_target_elf_flavour
2706 && ibfd->flags & DYNAMIC)
2708 asection *target = bfd_get_section_by_name (ibfd, name);
2710 && elf_section_data (target)->sreloc == s
2711 && ((target->output_section->flags
2712 & (SEC_READONLY | SEC_ALLOC))
2713 == (SEC_READONLY | SEC_ALLOC)))
2715 reltext_exist = TRUE;
2720 relocs_exist = TRUE;
2723 /* We use the reloc_count field as a counter if we need to
2724 copy relocs into the output file. */
2729 /* It's not one of our sections, so don't allocate space. */
2735 s->flags |= SEC_EXCLUDE;
2739 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2742 /* Allocate memory for the section contents. */
2743 s->contents = bfd_zalloc (dynobj, s->size);
2744 if (s->contents == NULL)
2748 if (htab->dynamic_sections_created)
2750 /* TODO: Check if this is needed. */
2751 if (!bfd_link_pic (info))
2752 if (!_bfd_elf_add_dynamic_entry (info, DT_DEBUG, 0))
2755 if (htab->splt && (htab->splt->flags & SEC_EXCLUDE) == 0)
2756 if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0)
2757 || !_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0)
2758 || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
2759 || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0))
2763 if (!_bfd_elf_add_dynamic_entry (info, DT_RELA, 0)
2764 || !_bfd_elf_add_dynamic_entry (info, DT_RELASZ, 0)
2765 || !_bfd_elf_add_dynamic_entry (info, DT_RELAENT,
2766 sizeof (Elf32_External_Rela)))
2770 if (!_bfd_elf_add_dynamic_entry (info, DT_TEXTREL, 0))
2778 /* Classify dynamic relocs such that -z combreloc can reorder and combine
2780 static enum elf_reloc_type_class
2781 elf32_arc_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
2782 const asection *rel_sec ATTRIBUTE_UNUSED,
2783 const Elf_Internal_Rela *rela)
2785 switch ((int) ELF32_R_TYPE (rela->r_info))
2787 case R_ARC_RELATIVE:
2788 return reloc_class_relative;
2789 case R_ARC_JMP_SLOT:
2790 return reloc_class_plt;
2792 return reloc_class_copy;
2793 /* TODO: Needed in future to support ifunc. */
2795 case R_ARC_IRELATIVE:
2796 return reloc_class_ifunc;
2799 return reloc_class_normal;
2803 const struct elf_size_info arc_elf32_size_info =
2805 sizeof (Elf32_External_Ehdr),
2806 sizeof (Elf32_External_Phdr),
2807 sizeof (Elf32_External_Shdr),
2808 sizeof (Elf32_External_Rel),
2809 sizeof (Elf32_External_Rela),
2810 sizeof (Elf32_External_Sym),
2811 sizeof (Elf32_External_Dyn),
2812 sizeof (Elf_External_Note),
2816 ELFCLASS32, EV_CURRENT,
2817 bfd_elf32_write_out_phdrs,
2818 bfd_elf32_write_shdrs_and_ehdr,
2819 bfd_elf32_checksum_contents,
2820 bfd_elf32_write_relocs,
2821 bfd_elf32_swap_symbol_in,
2822 bfd_elf32_swap_symbol_out,
2823 bfd_elf32_slurp_reloc_table,
2824 bfd_elf32_slurp_symbol_table,
2825 bfd_elf32_swap_dyn_in,
2826 bfd_elf32_swap_dyn_out,
2827 bfd_elf32_swap_reloc_in,
2828 bfd_elf32_swap_reloc_out,
2829 bfd_elf32_swap_reloca_in,
2830 bfd_elf32_swap_reloca_out
2833 #define elf_backend_size_info arc_elf32_size_info
2835 /* GDB expects general purpose registers to be in section .reg. However Linux
2836 kernel doesn't create this section and instead writes registers to NOTE
2837 section. It is up to the binutils to create a pseudo-section .reg from the
2838 contents of NOTE. Also BFD will read pid and signal number from NOTE. This
2839 function relies on offsets inside elf_prstatus structure in Linux to be
2843 elf32_arc_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
2848 switch (note->descsz)
2853 case 236: /* sizeof (struct elf_prstatus) on Linux/arc. */
2855 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
2857 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
2860 size = (40 * 4); /* There are 40 registers in user_regs_struct. */
2863 /* Make a ".reg/999" section. */
2864 return _bfd_elfcore_make_pseudosection (abfd, ".reg", size,
2865 note->descpos + offset);
2868 /* Determine whether an object attribute tag takes an integer, a
2872 elf32_arc_obj_attrs_arg_type (int tag)
2874 if (tag == Tag_ARC_CPU_name
2875 || tag == Tag_ARC_ISA_config
2876 || tag == Tag_ARC_ISA_apex)
2877 return ATTR_TYPE_FLAG_STR_VAL;
2878 else if (tag < (Tag_ARC_ISA_mpy_option + 1))
2879 return ATTR_TYPE_FLAG_INT_VAL;
2881 return (tag & 1) != 0 ? ATTR_TYPE_FLAG_STR_VAL : ATTR_TYPE_FLAG_INT_VAL;
2884 /* Attribute numbers >=14 can be safely ignored. */
2887 elf32_arc_obj_attrs_handle_unknown (bfd *abfd, int tag)
2889 if ((tag & 127) < (Tag_ARC_ISA_mpy_option + 1))
2892 (_("%pB: unknown mandatory ARC object attribute %d"),
2894 bfd_set_error (bfd_error_bad_value);
2900 (_("warning: %pB: unknown ARC object attribute %d"),
2906 /* Handle an ARC specific section when reading an object file. This is
2907 called when bfd_section_from_shdr finds a section with an unknown
2911 elf32_arc_section_from_shdr (bfd *abfd,
2912 Elf_Internal_Shdr * hdr,
2916 switch (hdr->sh_type)
2918 case 0x0c: /* MWDT specific section, don't complain about it. */
2919 case SHT_ARC_ATTRIBUTES:
2926 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
2932 #define TARGET_LITTLE_SYM arc_elf32_le_vec
2933 #define TARGET_LITTLE_NAME "elf32-littlearc"
2934 #define TARGET_BIG_SYM arc_elf32_be_vec
2935 #define TARGET_BIG_NAME "elf32-bigarc"
2936 #define ELF_ARCH bfd_arch_arc
2937 #define ELF_TARGET_ID ARC_ELF_DATA
2938 #define ELF_MACHINE_CODE EM_ARC_COMPACT
2939 #define ELF_MACHINE_ALT1 EM_ARC_COMPACT2
2940 #define ELF_MAXPAGESIZE 0x2000
2942 #define bfd_elf32_bfd_link_hash_table_create arc_elf_link_hash_table_create
2944 #define bfd_elf32_bfd_merge_private_bfd_data arc_elf_merge_private_bfd_data
2945 #define bfd_elf32_bfd_reloc_type_lookup arc_elf32_bfd_reloc_type_lookup
2946 #define bfd_elf32_bfd_set_private_flags arc_elf_set_private_flags
2947 #define bfd_elf32_bfd_print_private_bfd_data arc_elf_print_private_bfd_data
2948 #define bfd_elf32_bfd_copy_private_bfd_data arc_elf_copy_private_bfd_data
2950 #define elf_info_to_howto_rel arc_info_to_howto_rel
2951 #define elf_backend_object_p arc_elf_object_p
2952 #define elf_backend_final_write_processing arc_elf_final_write_processing
2954 #define elf_backend_relocate_section elf_arc_relocate_section
2955 #define elf_backend_check_relocs elf_arc_check_relocs
2956 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
2958 #define elf_backend_reloc_type_class elf32_arc_reloc_type_class
2960 #define elf_backend_adjust_dynamic_symbol elf_arc_adjust_dynamic_symbol
2961 #define elf_backend_finish_dynamic_symbol elf_arc_finish_dynamic_symbol
2963 #define elf_backend_finish_dynamic_sections elf_arc_finish_dynamic_sections
2964 #define elf_backend_size_dynamic_sections elf_arc_size_dynamic_sections
2966 #define elf_backend_can_gc_sections 1
2967 #define elf_backend_want_got_plt 1
2968 #define elf_backend_plt_readonly 1
2969 #define elf_backend_rela_plts_and_copies_p 1
2970 #define elf_backend_want_plt_sym 0
2971 #define elf_backend_got_header_size 12
2972 #define elf_backend_dtrel_excludes_plt 1
2974 #define elf_backend_may_use_rel_p 0
2975 #define elf_backend_may_use_rela_p 1
2976 #define elf_backend_default_use_rela_p 1
2978 #define elf_backend_grok_prstatus elf32_arc_grok_prstatus
2980 #define elf_backend_default_execstack 0
2982 #undef elf_backend_obj_attrs_vendor
2983 #define elf_backend_obj_attrs_vendor "ARC"
2984 #undef elf_backend_obj_attrs_section
2985 #define elf_backend_obj_attrs_section ".ARC.attributes"
2986 #undef elf_backend_obj_attrs_arg_type
2987 #define elf_backend_obj_attrs_arg_type elf32_arc_obj_attrs_arg_type
2988 #undef elf_backend_obj_attrs_section_type
2989 #define elf_backend_obj_attrs_section_type SHT_ARC_ATTRIBUTES
2990 #define elf_backend_obj_attrs_handle_unknown elf32_arc_obj_attrs_handle_unknown
2992 #define elf_backend_section_from_shdr elf32_arc_section_from_shdr
2994 #include "elf32-target.h"