1 /* ELF object file format
2 Copyright (C) 1992-2020 Free Software Foundation, Inc.
4 This file is part of GAS, the GNU Assembler.
6 GAS is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as
8 published by the Free Software Foundation; either version 3,
9 or (at your option) any later version.
11 GAS is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
14 the GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GAS; see the file COPYING. If not, write to the Free
18 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
21 #define OBJ_HEADER "obj-elf.h"
23 #include "safe-ctype.h"
26 #include "dwarf2dbg.h"
28 #ifndef ECOFF_DEBUGGING
29 #define ECOFF_DEBUGGING 0
31 #define NEED_ECOFF_DEBUG
34 #ifdef NEED_ECOFF_DEBUG
36 #include "bfd/ecoff-bfd.h"
40 #include "elf/alpha.h"
52 #include "elf/x86-64.h"
60 #include "elf/nios2.h"
67 static void obj_elf_line (int);
68 static void obj_elf_size (int);
69 static void obj_elf_type (int);
70 static void obj_elf_ident (int);
71 static void obj_elf_weak (int);
72 static void obj_elf_local (int);
73 static void obj_elf_visibility (int);
74 static void obj_elf_symver (int);
75 static void obj_elf_subsection (int);
76 static void obj_elf_popsection (int);
77 static void obj_elf_gnu_attribute (int);
78 static void obj_elf_tls_common (int);
79 static void obj_elf_lcomm (int);
80 static void obj_elf_struct (int);
82 static const pseudo_typeS elf_pseudo_table
[] =
84 {"comm", obj_elf_common
, 0},
85 {"common", obj_elf_common
, 1},
86 {"ident", obj_elf_ident
, 0},
87 {"lcomm", obj_elf_lcomm
, 0},
88 {"local", obj_elf_local
, 0},
89 {"previous", obj_elf_previous
, 0},
90 {"section", obj_elf_section
, 0},
91 {"section.s", obj_elf_section
, 0},
92 {"sect", obj_elf_section
, 0},
93 {"sect.s", obj_elf_section
, 0},
94 {"pushsection", obj_elf_section
, 1},
95 {"popsection", obj_elf_popsection
, 0},
96 {"size", obj_elf_size
, 0},
97 {"type", obj_elf_type
, 0},
98 {"version", obj_elf_version
, 0},
99 {"weak", obj_elf_weak
, 0},
101 /* These define symbol visibility. */
102 {"internal", obj_elf_visibility
, STV_INTERNAL
},
103 {"hidden", obj_elf_visibility
, STV_HIDDEN
},
104 {"protected", obj_elf_visibility
, STV_PROTECTED
},
106 /* These are used for stabs-in-elf configurations. */
107 {"line", obj_elf_line
, 0},
109 /* This is a GNU extension to handle symbol versions. */
110 {"symver", obj_elf_symver
, 0},
112 /* A GNU extension to change subsection only. */
113 {"subsection", obj_elf_subsection
, 0},
115 /* These are GNU extensions to aid in garbage collecting C++ vtables. */
116 {"vtable_inherit", obj_elf_vtable_inherit
, 0},
117 {"vtable_entry", obj_elf_vtable_entry
, 0},
119 /* A GNU extension for object attributes. */
120 {"gnu_attribute", obj_elf_gnu_attribute
, 0},
122 /* These are used for dwarf. */
126 /* These are used for dwarf2. */
127 { "file", dwarf2_directive_file
, 0 },
128 { "loc", dwarf2_directive_loc
, 0 },
129 { "loc_mark_labels", dwarf2_directive_loc_mark_labels
, 0 },
131 /* We need to trap the section changing calls to handle .previous. */
132 {"data", obj_elf_data
, 0},
133 {"offset", obj_elf_struct
, 0},
134 {"struct", obj_elf_struct
, 0},
135 {"text", obj_elf_text
, 0},
137 {"tls_common", obj_elf_tls_common
, 0},
143 static const pseudo_typeS ecoff_debug_pseudo_table
[] =
145 #ifdef NEED_ECOFF_DEBUG
146 /* COFF style debugging information for ECOFF. .ln is not used; .loc
148 { "def", ecoff_directive_def
, 0 },
149 { "dim", ecoff_directive_dim
, 0 },
150 { "endef", ecoff_directive_endef
, 0 },
151 { "file", ecoff_directive_file
, 0 },
152 { "scl", ecoff_directive_scl
, 0 },
153 { "tag", ecoff_directive_tag
, 0 },
154 { "val", ecoff_directive_val
, 0 },
156 /* COFF debugging requires pseudo-ops .size and .type, but ELF
157 already has meanings for those. We use .esize and .etype
158 instead. These are only generated by gcc anyhow. */
159 { "esize", ecoff_directive_size
, 0 },
160 { "etype", ecoff_directive_type
, 0 },
162 /* ECOFF specific debugging information. */
163 { "aent", ecoff_directive_ent
, 1 },
164 { "begin", ecoff_directive_begin
, 0 },
165 { "bend", ecoff_directive_bend
, 0 },
166 { "end", ecoff_directive_end
, 0 },
167 { "ent", ecoff_directive_ent
, 0 },
168 { "fmask", ecoff_directive_fmask
, 0 },
169 { "frame", ecoff_directive_frame
, 0 },
170 { "loc", ecoff_directive_loc
, 0 },
171 { "mask", ecoff_directive_mask
, 0 },
173 /* Other ECOFF directives. */
174 { "extern", ecoff_directive_extern
, 0 },
176 /* These are used on Irix. I don't know how to implement them. */
177 { "alias", s_ignore
, 0 },
178 { "bgnb", s_ignore
, 0 },
179 { "endb", s_ignore
, 0 },
180 { "lab", s_ignore
, 0 },
181 { "noalias", s_ignore
, 0 },
182 { "verstamp", s_ignore
, 0 },
183 { "vreg", s_ignore
, 0 },
186 {NULL
, NULL
, 0} /* end sentinel */
190 #include "aout/aout64.h"
192 /* This is called when the assembler starts. */
194 asection
*elf_com_section_ptr
;
201 /* Add symbols for the known sections to the symbol table. */
202 s
= bfd_get_section_by_name (stdoutput
, TEXT_SECTION_NAME
);
203 symbol_table_insert (section_symbol (s
));
204 s
= bfd_get_section_by_name (stdoutput
, DATA_SECTION_NAME
);
205 symbol_table_insert (section_symbol (s
));
206 s
= bfd_get_section_by_name (stdoutput
, BSS_SECTION_NAME
);
207 symbol_table_insert (section_symbol (s
));
208 elf_com_section_ptr
= bfd_com_section_ptr
;
212 elf_pop_insert (void)
214 pop_insert (elf_pseudo_table
);
216 pop_insert (ecoff_debug_pseudo_table
);
220 elf_s_get_size (symbolS
*sym
)
222 return S_GET_SIZE (sym
);
226 elf_s_set_size (symbolS
*sym
, bfd_vma sz
)
228 S_SET_SIZE (sym
, sz
);
232 elf_s_get_align (symbolS
*sym
)
234 return S_GET_ALIGN (sym
);
238 elf_s_set_align (symbolS
*sym
, bfd_vma align
)
240 S_SET_ALIGN (sym
, align
);
244 elf_s_get_other (symbolS
*sym
)
246 return elf_symbol (symbol_get_bfdsym (sym
))->internal_elf_sym
.st_other
;
250 elf_s_set_other (symbolS
*sym
, int other
)
252 S_SET_OTHER (sym
, other
);
256 elf_sec_sym_ok_for_reloc (asection
*sec
)
258 return obj_sec_sym_ok_for_reloc (sec
);
262 elf_file_symbol (const char *s
, int appfile
)
267 || symbol_rootP
== NULL
268 || (bsym
= symbol_get_bfdsym (symbol_rootP
)) == NULL
269 || (bsym
->flags
& BSF_FILE
) == 0)
274 sym
= symbol_new (s
, absolute_section
, 0, NULL
);
275 symbol_set_frag (sym
, &zero_address_frag
);
277 name_length
= strlen (s
);
278 if (name_length
> strlen (S_GET_NAME (sym
)))
280 obstack_grow (¬es
, s
, name_length
+ 1);
281 S_SET_NAME (sym
, (const char *) obstack_finish (¬es
));
284 strcpy ((char *) S_GET_NAME (sym
), s
);
286 symbol_get_bfdsym (sym
)->flags
|= BSF_FILE
;
288 if (symbol_rootP
!= sym
289 && ((bsym
= symbol_get_bfdsym (symbol_rootP
)) == NULL
290 || (bsym
->flags
& BSF_FILE
) == 0))
292 symbol_remove (sym
, &symbol_rootP
, &symbol_lastP
);
293 symbol_insert (sym
, symbol_rootP
, &symbol_rootP
, &symbol_lastP
);
297 verify_symbol_chain (symbol_rootP
, symbol_lastP
);
301 #ifdef NEED_ECOFF_DEBUG
302 ecoff_new_file (s
, appfile
);
306 /* Called from read.c:s_comm after we've parsed .comm symbol, size.
307 Parse a possible alignment value. */
310 elf_common_parse (int ignore ATTRIBUTE_UNUSED
, symbolS
*symbolP
, addressT size
)
313 int is_local
= symbol_get_obj (symbolP
)->local
;
315 if (*input_line_pointer
== ',')
317 char *save
= input_line_pointer
;
319 input_line_pointer
++;
322 if (*input_line_pointer
== '"')
324 /* For sparc. Accept .common symbol, length, "bss" */
325 input_line_pointer
++;
326 /* Some use the dot, some don't. */
327 if (*input_line_pointer
== '.')
328 input_line_pointer
++;
329 /* Some say data, some say bss. */
330 if (strncmp (input_line_pointer
, "bss\"", 4) == 0)
331 input_line_pointer
+= 4;
332 else if (strncmp (input_line_pointer
, "data\"", 5) == 0)
333 input_line_pointer
+= 5;
336 char *p
= input_line_pointer
;
341 while (!is_end_of_line
[(unsigned char) *input_line_pointer
])
342 if (*input_line_pointer
++ == '"')
344 c
= *input_line_pointer
;
345 *input_line_pointer
= '\0';
346 as_bad (_("bad .common segment %s"), p
);
347 *input_line_pointer
= c
;
348 ignore_rest_of_line ();
351 /* ??? Don't ask me why these are always global. */
356 input_line_pointer
= save
;
357 align
= parse_align (is_local
);
358 if (align
== (addressT
) -1)
365 bss_alloc (symbolP
, size
, align
);
366 S_CLEAR_EXTERNAL (symbolP
);
370 S_SET_VALUE (symbolP
, size
);
371 S_SET_ALIGN (symbolP
, align
);
372 S_SET_EXTERNAL (symbolP
);
373 S_SET_SEGMENT (symbolP
, elf_com_section_ptr
);
376 symbol_get_bfdsym (symbolP
)->flags
|= BSF_OBJECT
;
382 obj_elf_common (int is_common
)
384 if (flag_mri
&& is_common
)
387 s_comm_internal (0, elf_common_parse
);
391 obj_elf_tls_common (int ignore ATTRIBUTE_UNUSED
)
393 symbolS
*symbolP
= s_comm_internal (0, elf_common_parse
);
396 symbol_get_bfdsym (symbolP
)->flags
|= BSF_THREAD_LOCAL
;
400 obj_elf_lcomm (int ignore ATTRIBUTE_UNUSED
)
402 symbolS
*symbolP
= s_comm_internal (0, s_lcomm_internal
);
405 symbol_get_bfdsym (symbolP
)->flags
|= BSF_OBJECT
;
409 get_sym_from_input_line_and_check (void)
415 c
= get_symbol_name (& name
);
416 sym
= symbol_find_or_make (name
);
417 *input_line_pointer
= c
;
418 SKIP_WHITESPACE_AFTER_NAME ();
420 /* There is no symbol name if input_line_pointer has not moved. */
421 if (name
== input_line_pointer
)
422 as_bad (_("Missing symbol name in directive"));
427 obj_elf_local (int ignore ATTRIBUTE_UNUSED
)
434 symbolP
= get_sym_from_input_line_and_check ();
435 c
= *input_line_pointer
;
436 S_CLEAR_EXTERNAL (symbolP
);
437 symbol_get_obj (symbolP
)->local
= 1;
440 input_line_pointer
++;
442 if (*input_line_pointer
== '\n')
447 demand_empty_rest_of_line ();
451 obj_elf_weak (int ignore ATTRIBUTE_UNUSED
)
458 symbolP
= get_sym_from_input_line_and_check ();
459 c
= *input_line_pointer
;
460 S_SET_WEAK (symbolP
);
463 input_line_pointer
++;
465 if (*input_line_pointer
== '\n')
470 demand_empty_rest_of_line ();
474 obj_elf_visibility (int visibility
)
479 elf_symbol_type
*elfsym
;
483 symbolP
= get_sym_from_input_line_and_check ();
485 bfdsym
= symbol_get_bfdsym (symbolP
);
486 elfsym
= elf_symbol_from (bfd_asymbol_bfd (bfdsym
), bfdsym
);
490 elfsym
->internal_elf_sym
.st_other
&= ~3;
491 elfsym
->internal_elf_sym
.st_other
|= visibility
;
493 c
= *input_line_pointer
;
496 input_line_pointer
++;
500 if (*input_line_pointer
== '\n')
506 demand_empty_rest_of_line ();
509 static segT previous_section
;
510 static int previous_subsection
;
514 struct section_stack
*next
;
516 int subseg
, prev_subseg
;
519 static struct section_stack
*section_stack
;
522 get_section (bfd
*abfd ATTRIBUTE_UNUSED
, asection
*sec
, void *inf
)
524 struct elf_section_match
*match
= (struct elf_section_match
*) inf
;
525 const char *gname
= match
->group_name
;
526 const char *group_name
= elf_group_name (sec
);
527 const char *linked_to_symbol_name
528 = sec
->map_head
.linked_to_symbol_name
;
529 unsigned int info
= elf_section_data (sec
)->this_hdr
.sh_info
;
531 return (info
== match
->info
532 && ((bfd_section_flags (sec
) & SEC_ASSEMBLER_SECTION_ID
)
533 == (match
->flags
& SEC_ASSEMBLER_SECTION_ID
))
534 && sec
->section_id
== match
->section_id
535 && (group_name
== gname
536 || (group_name
!= NULL
538 && strcmp (group_name
, gname
) == 0))
539 && (linked_to_symbol_name
== match
->linked_to_symbol_name
540 || (linked_to_symbol_name
!= NULL
541 && match
->linked_to_symbol_name
!= NULL
542 && strcmp (linked_to_symbol_name
,
543 match
->linked_to_symbol_name
) == 0)));
546 /* Handle the .section pseudo-op. This code supports two different
549 The first is found on Solaris, and looks like
550 .section ".sec1",#alloc,#execinstr,#write
551 Here the names after '#' are the SHF_* flags to turn on for the
552 section. I'm not sure how it determines the SHT_* type (BFD
553 doesn't really give us control over the type, anyhow).
555 The second format is found on UnixWare, and probably most SVR4
556 machines, and looks like
557 .section .sec1,"a",@progbits
558 The quoted string may contain any combination of a, w, x, and
559 represents the SHF_* flags to turn on for the section. The string
560 beginning with '@' can be progbits or nobits. There should be
561 other possibilities, but I don't know what they are. In any case,
562 BFD doesn't really let us set the section type. */
565 obj_elf_change_section (const char *name
,
569 struct elf_section_match
*match_p
,
576 const struct elf_backend_data
*bed
;
577 const struct bfd_elf_special_section
*ssect
;
581 static struct elf_section_match unused_match
;
582 match_p
= &unused_match
;
585 #ifdef md_flush_pending_output
586 md_flush_pending_output ();
589 /* Switch to the section, creating it if necessary. */
592 struct section_stack
*elt
;
593 elt
= XNEW (struct section_stack
);
594 elt
->next
= section_stack
;
596 elt
->prev_seg
= previous_section
;
597 elt
->subseg
= now_subseg
;
598 elt
->prev_subseg
= previous_subsection
;
601 previous_section
= now_seg
;
602 previous_subsection
= now_subseg
;
604 old_sec
= bfd_get_section_by_name_if (stdoutput
, name
, get_section
,
612 sec
= subseg_force_new (name
, 0);
614 bed
= get_elf_backend_data (stdoutput
);
615 ssect
= (*bed
->get_sec_type_attr
) (stdoutput
, sec
);
619 bfd_boolean override
= FALSE
;
621 if (type
== SHT_NULL
)
623 else if (type
!= ssect
->type
)
626 /* Some older versions of gcc will emit
628 .section .init_array,"aw",@progbits
630 for __attribute__ ((section (".init_array"))).
631 "@progbits" is incorrect. Also for x86-64 large bss
632 sections, some older versions of gcc will emit
634 .section .lbss,"aw",@progbits
636 "@progbits" is incorrect. */
638 && (bed
->s
->arch_size
!= 64
639 || !(ssect
->attr
& SHF_X86_64_LARGE
))
641 && ssect
->type
!= SHT_INIT_ARRAY
642 && ssect
->type
!= SHT_FINI_ARRAY
643 && ssect
->type
!= SHT_PREINIT_ARRAY
)
645 /* We allow to specify any type for a .note section. */
646 if (ssect
->type
!= SHT_NOTE
647 /* Processor and application defined types are allowed too. */
648 && type
< SHT_LOPROC
)
649 as_warn (_("setting incorrect section type for %s"),
654 as_warn (_("ignoring incorrect section type for %s"),
660 if (old_sec
== NULL
&& ((attr
& ~(SHF_MASKOS
| SHF_MASKPROC
))
661 & ~ssect
->attr
) != 0)
663 /* As a GNU extension, we permit a .note section to be
664 allocatable. If the linker sees an allocatable .note
665 section, it will create a PT_NOTE segment in the output
666 file. We also allow "x" for .note.GNU-stack. */
667 if (ssect
->type
== SHT_NOTE
668 && (attr
== SHF_ALLOC
|| attr
== SHF_EXECINSTR
))
670 /* Allow different SHF_MERGE and SHF_STRINGS if we have
671 something like .rodata.str. */
672 else if (ssect
->suffix_length
== -2
673 && name
[ssect
->prefix_length
] == '.'
677 & ~SHF_STRINGS
) == 0)
679 /* .interp, .strtab and .symtab can have SHF_ALLOC. */
680 else if (attr
== SHF_ALLOC
681 && (strcmp (name
, ".interp") == 0
682 || strcmp (name
, ".strtab") == 0
683 || strcmp (name
, ".symtab") == 0))
685 /* .note.GNU-stack can have SHF_EXECINSTR. */
686 else if (attr
== SHF_EXECINSTR
687 && strcmp (name
, ".note.GNU-stack") == 0)
690 /* A section on Alpha may have SHF_ALPHA_GPREL. */
691 else if ((attr
& ~ssect
->attr
) == SHF_ALPHA_GPREL
)
695 else if (attr
== (SHF_EXECINSTR
| SHF_WRITE
| SHF_ALLOC
)
696 && (ssect
->type
== SHT_INIT_ARRAY
697 || ssect
->type
== SHT_FINI_ARRAY
698 || ssect
->type
== SHT_PREINIT_ARRAY
))
699 /* RX init/fini arrays can and should have the "awx" attributes set. */
704 if (match_p
->group_name
== NULL
)
705 as_warn (_("setting incorrect section attributes for %s"),
711 if (!override
&& old_sec
== NULL
)
715 /* Convert ELF type and flags to BFD flags. */
717 | ((attr
& SHF_WRITE
) ? 0 : SEC_READONLY
)
718 | ((attr
& SHF_ALLOC
) ? SEC_ALLOC
: 0)
719 | (((attr
& SHF_ALLOC
) && type
!= SHT_NOBITS
) ? SEC_LOAD
: 0)
720 | ((attr
& SHF_EXECINSTR
) ? SEC_CODE
: 0)
721 | ((attr
& SHF_MERGE
) ? SEC_MERGE
: 0)
722 | ((attr
& SHF_STRINGS
) ? SEC_STRINGS
: 0)
723 | ((attr
& SHF_EXCLUDE
) ? SEC_EXCLUDE
: 0)
724 | ((attr
& SHF_TLS
) ? SEC_THREAD_LOCAL
: 0));
725 #ifdef md_elf_section_flags
726 flags
= md_elf_section_flags (flags
, attr
, type
);
730 flags
|= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
736 if (type
== SHT_NULL
)
737 type
= bfd_elf_get_default_section_type (flags
);
738 elf_section_type (sec
) = type
;
739 elf_section_flags (sec
) = attr
;
740 elf_section_data (sec
)->this_hdr
.sh_info
= match_p
->info
;
742 /* Prevent SEC_HAS_CONTENTS from being inadvertently set. */
743 if (type
== SHT_NOBITS
)
744 seg_info (sec
)->bss
= 1;
746 /* Set the section ID and flags. */
747 sec
->section_id
= match_p
->section_id
;
748 flags
|= match_p
->flags
;
750 /* Set the linked-to symbol name. */
751 sec
->map_head
.linked_to_symbol_name
752 = match_p
->linked_to_symbol_name
;
754 bfd_set_section_flags (sec
, flags
);
755 if (flags
& SEC_MERGE
)
756 sec
->entsize
= entsize
;
757 elf_group_name (sec
) = match_p
->group_name
;
759 /* Add a symbol for this section to the symbol table. */
760 secsym
= symbol_find (name
);
762 symbol_set_bfdsym (secsym
, sec
->symbol
);
764 symbol_table_insert (section_symbol (sec
));
769 && (unsigned) type
!= elf_section_type (old_sec
))
772 /* This is a special section with known type. User
773 assembly might get the section type wrong; Even high
774 profile projects like glibc have done so in the past.
775 So don't error in this case. */
776 as_warn (_("ignoring changed section type for %s"), name
);
778 /* Do error when assembly isn't self-consistent. */
779 as_bad (_("changed section type for %s"), name
);
784 /* If section attributes are specified the second time we see a
785 particular section, then check that they are the same as we
786 saw the first time. */
787 if (((old_sec
->flags
^ flags
)
788 & (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
| SEC_CODE
789 | SEC_EXCLUDE
| SEC_SORT_ENTRIES
| SEC_MERGE
| SEC_STRINGS
790 | SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
791 | SEC_THREAD_LOCAL
)))
794 as_warn (_("ignoring changed section attributes for %s"), name
);
796 as_bad (_("changed section attributes for %s"), name
);
799 /* FIXME: Maybe we should consider removing a previously set
800 processor or application specific attribute as suspicious ? */
801 elf_section_flags (sec
) = attr
;
803 if ((flags
& SEC_MERGE
) && old_sec
->entsize
!= (unsigned) entsize
)
804 as_bad (_("changed section entity size for %s"), name
);
808 #ifdef md_elf_section_change_hook
809 md_elf_section_change_hook ();
814 obj_elf_parse_section_letters (char *str
, size_t len
,
815 bfd_boolean
*is_clone
, bfd_vma
*gnu_attr
)
831 attr
|= SHF_LINK_ORDER
;
837 attr
|= SHF_EXECINSTR
;
852 *gnu_attr
|= SHF_GNU_MBIND
;
859 if (*(str
- 1) == 'a')
862 if (len
> 1 && str
[1] == 's')
872 const char *bad_msg
= _("unrecognized .section attribute:"
873 " want a,e,o,w,x,M,S,G,T or number");
874 #ifdef md_elf_section_letter
875 bfd_vma md_attr
= md_elf_section_letter (*str
, &bad_msg
);
876 if (md_attr
!= (bfd_vma
) -1)
884 attr
|= strtoul (str
, & end
, 0);
885 /* Update str and len, allowing for the fact that
886 we will execute str++ and len-- below. */
892 as_fatal ("%s", bad_msg
);
903 obj_elf_section_type (char *str
, size_t len
, bfd_boolean warn
)
905 if (len
== 8 && strncmp (str
, "progbits", 8) == 0)
907 if (len
== 6 && strncmp (str
, "nobits", 6) == 0)
909 if (len
== 4 && strncmp (str
, "note", 4) == 0)
911 if (len
== 10 && strncmp (str
, "init_array", 10) == 0)
912 return SHT_INIT_ARRAY
;
913 if (len
== 10 && strncmp (str
, "fini_array", 10) == 0)
914 return SHT_FINI_ARRAY
;
915 if (len
== 13 && strncmp (str
, "preinit_array", 13) == 0)
916 return SHT_PREINIT_ARRAY
;
918 #ifdef md_elf_section_type
920 int md_type
= md_elf_section_type (str
, len
);
929 int type
= strtoul (str
, & end
, 0);
931 if (warn
&& (size_t) (end
- str
) != len
)
932 as_warn (_("extraneous characters at end of numeric section type"));
938 as_warn (_("unrecognized section type"));
943 obj_elf_section_word (char *str
, size_t len
, int *type
)
947 if (len
== 5 && strncmp (str
, "write", 5) == 0)
949 if (len
== 5 && strncmp (str
, "alloc", 5) == 0)
951 if (len
== 9 && strncmp (str
, "execinstr", 9) == 0)
952 return SHF_EXECINSTR
;
953 if (len
== 7 && strncmp (str
, "exclude", 7) == 0)
955 if (len
== 3 && strncmp (str
, "tls", 3) == 0)
958 #ifdef md_elf_section_word
960 bfd_vma md_attr
= md_elf_section_word (str
, len
);
966 ret
= obj_elf_section_type (str
, len
, FALSE
);
970 as_warn (_("unrecognized section attribute"));
975 /* Get name of section. */
977 obj_elf_section_name (void)
982 if (*input_line_pointer
== '"')
986 name
= demand_copy_C_string (&dummy
);
989 ignore_rest_of_line ();
995 char *end
= input_line_pointer
;
997 while (0 == strchr ("\n\t,; ", *end
))
999 if (end
== input_line_pointer
)
1001 as_bad (_("missing name"));
1002 ignore_rest_of_line ();
1006 name
= xmemdup0 (input_line_pointer
, end
- input_line_pointer
);
1008 while (flag_sectname_subst
)
1010 char *subst
= strchr (name
, '%');
1011 if (subst
&& subst
[1] == 'S')
1013 int oldlen
= strlen (name
);
1014 int substlen
= strlen (now_seg
->name
);
1015 int newlen
= oldlen
- 2 + substlen
;
1016 char *newname
= XNEWVEC (char, newlen
+ 1);
1017 int headlen
= subst
- name
;
1018 memcpy (newname
, name
, headlen
);
1019 strcpy (newname
+ headlen
, now_seg
->name
);
1020 strcat (newname
+ headlen
, subst
+ 2);
1028 #ifdef tc_canonicalize_section_name
1029 name
= tc_canonicalize_section_name (name
);
1031 input_line_pointer
= end
;
1038 obj_elf_section (int push
)
1047 subsegT new_subsection
= -1;
1048 struct elf_section_match match
;
1054 #ifdef md_flush_pending_output
1055 md_flush_pending_output ();
1058 previous_section
= now_seg
;
1059 previous_subsection
= now_subseg
;
1061 s_mri_sect (&mri_type
);
1063 #ifdef md_elf_section_change_hook
1064 md_elf_section_change_hook ();
1070 name
= obj_elf_section_name ();
1074 memset (&match
, 0, sizeof (match
));
1077 if ((sym
= symbol_find (name
)) != NULL
1078 && ! symbol_section_p (sym
)
1079 && S_IS_DEFINED (sym
)
1080 && ! S_IS_VOLATILE (sym
)
1081 && ! S_CAN_BE_REDEFINED (sym
))
1083 as_bad (_("section name '%s' already defined as another symbol"), name
);
1084 ignore_rest_of_line ();
1093 if (*input_line_pointer
== ',')
1095 /* Skip the comma. */
1096 ++input_line_pointer
;
1099 if (push
&& ISDIGIT (*input_line_pointer
))
1101 /* .pushsection has an optional subsection. */
1102 new_subsection
= (subsegT
) get_absolute_expression ();
1106 /* Stop if we don't see a comma. */
1107 if (*input_line_pointer
!= ',')
1110 /* Skip the comma. */
1111 ++input_line_pointer
;
1115 if (*input_line_pointer
== '"')
1117 bfd_boolean is_clone
;
1119 beg
= demand_copy_C_string (&dummy
);
1122 ignore_rest_of_line ();
1125 attr
|= obj_elf_parse_section_letters (beg
, strlen (beg
),
1126 &is_clone
, &gnu_attr
);
1129 if (*input_line_pointer
== ',')
1132 char *save
= input_line_pointer
;
1134 ++input_line_pointer
;
1136 c
= *input_line_pointer
;
1139 beg
= demand_copy_C_string (&dummy
);
1142 ignore_rest_of_line ();
1145 type
= obj_elf_section_type (beg
, strlen (beg
), TRUE
);
1147 else if (c
== '@' || c
== '%')
1149 ++input_line_pointer
;
1151 if (ISDIGIT (* input_line_pointer
))
1152 type
= strtoul (input_line_pointer
, &input_line_pointer
, 0);
1155 c
= get_symbol_name (& beg
);
1156 (void) restore_line_pointer (c
);
1157 type
= obj_elf_section_type (beg
,
1158 input_line_pointer
- beg
,
1163 input_line_pointer
= save
;
1167 if ((attr
& SHF_MERGE
) != 0 && *input_line_pointer
== ',')
1169 ++input_line_pointer
;
1171 entsize
= get_absolute_expression ();
1175 as_warn (_("invalid merge entity size"));
1180 else if ((attr
& SHF_MERGE
) != 0)
1182 as_warn (_("entity size for SHF_MERGE not specified"));
1186 if ((attr
& SHF_LINK_ORDER
) != 0 && *input_line_pointer
== ',')
1189 unsigned int length
;
1190 ++input_line_pointer
;
1192 c
= get_symbol_name (& beg
);
1193 (void) restore_line_pointer (c
);
1194 length
= input_line_pointer
- beg
;
1196 match
.linked_to_symbol_name
= xmemdup0 (beg
, length
);
1199 if ((attr
& SHF_GROUP
) != 0 && is_clone
)
1201 as_warn (_("? section flag ignored with G present"));
1204 if ((attr
& SHF_GROUP
) != 0 && *input_line_pointer
== ',')
1206 ++input_line_pointer
;
1207 match
.group_name
= obj_elf_section_name ();
1208 if (match
.group_name
== NULL
)
1210 else if (*input_line_pointer
== ',')
1212 ++input_line_pointer
;
1214 if (strncmp (input_line_pointer
, "comdat", 6) == 0)
1216 input_line_pointer
+= 6;
1220 else if (strncmp (name
, ".gnu.linkonce", 13) == 0)
1223 else if ((attr
& SHF_GROUP
) != 0)
1225 as_warn (_("group name for SHF_GROUP not specified"));
1231 const char *now_group
= elf_group_name (now_seg
);
1232 if (now_group
!= NULL
)
1234 match
.group_name
= xstrdup (now_group
);
1235 linkonce
= (now_seg
->flags
& SEC_LINK_ONCE
) != 0;
1239 if ((gnu_attr
& SHF_GNU_MBIND
) != 0 && *input_line_pointer
== ',')
1241 char *save
= input_line_pointer
;
1242 ++input_line_pointer
;
1244 if (ISDIGIT (* input_line_pointer
))
1246 char *t
= input_line_pointer
;
1247 match
.info
= strtoul (input_line_pointer
,
1248 &input_line_pointer
, 0);
1249 if (match
.info
== (unsigned int) -1)
1251 as_warn (_("unsupported mbind section info: %s"), t
);
1256 input_line_pointer
= save
;
1259 if (*input_line_pointer
== ',')
1261 char *save
= input_line_pointer
;
1262 ++input_line_pointer
;
1264 if (strncmp (input_line_pointer
, "unique", 6) == 0)
1266 input_line_pointer
+= 6;
1268 if (*input_line_pointer
== ',')
1270 ++input_line_pointer
;
1272 if (ISDIGIT (* input_line_pointer
))
1275 bfd_boolean overflow
;
1276 char *t
= input_line_pointer
;
1277 if (sizeof (bfd_vma
) <= sizeof (unsigned long))
1280 id
= strtoul (input_line_pointer
,
1281 &input_line_pointer
, 0);
1282 overflow
= (id
== (unsigned long) -1
1283 && errno
== ERANGE
);
1288 (input_line_pointer
,
1289 (const char **) &input_line_pointer
, 0);
1290 overflow
= id
== ~(bfd_vma
) 0;
1292 if (overflow
|| id
> (unsigned int) -1)
1294 char *linefeed
, saved_char
= 0;
1295 if ((linefeed
= strchr (t
, '\n')) != NULL
)
1297 saved_char
= *linefeed
;
1300 as_bad (_("unsupported section id: %s"), t
);
1302 *linefeed
= saved_char
;
1306 match
.section_id
= id
;
1307 match
.flags
|= SEC_ASSEMBLER_SECTION_ID
;
1313 input_line_pointer
= save
;
1323 if (*input_line_pointer
!= '#')
1325 as_bad (_("character following name is not '#'"));
1326 ignore_rest_of_line ();
1329 ++input_line_pointer
;
1330 c
= get_symbol_name (& beg
);
1331 (void) restore_line_pointer (c
);
1333 attr
|= obj_elf_section_word (beg
, input_line_pointer
- beg
,
1338 while (*input_line_pointer
++ == ',');
1339 --input_line_pointer
;
1344 demand_empty_rest_of_line ();
1346 obj_elf_change_section (name
, type
, attr
, entsize
, &match
, linkonce
,
1349 if ((gnu_attr
& SHF_GNU_MBIND
) != 0)
1351 struct elf_backend_data
*bed
;
1353 if ((attr
& SHF_ALLOC
) == 0)
1354 as_bad (_("SHF_ALLOC isn't set for GNU_MBIND section: %s"), name
);
1356 bed
= (struct elf_backend_data
*) get_elf_backend_data (stdoutput
);
1357 if (bed
->elf_osabi
== ELFOSABI_NONE
)
1358 bed
->elf_osabi
= ELFOSABI_GNU
;
1359 else if (bed
->elf_osabi
!= ELFOSABI_GNU
1360 && bed
->elf_osabi
!= ELFOSABI_FREEBSD
)
1361 as_bad (_("GNU_MBIND section is supported only by GNU "
1362 "and FreeBSD targets"));
1363 elf_tdata (stdoutput
)->has_gnu_osabi
|= elf_gnu_osabi_mbind
;
1365 elf_section_flags (now_seg
) |= gnu_attr
;
1367 if (push
&& new_subsection
!= -1)
1368 subseg_set (now_seg
, new_subsection
);
1371 /* Change to the .data section. */
1374 obj_elf_data (int i
)
1376 #ifdef md_flush_pending_output
1377 md_flush_pending_output ();
1380 previous_section
= now_seg
;
1381 previous_subsection
= now_subseg
;
1384 #ifdef md_elf_section_change_hook
1385 md_elf_section_change_hook ();
1389 /* Change to the .text section. */
1392 obj_elf_text (int i
)
1394 #ifdef md_flush_pending_output
1395 md_flush_pending_output ();
1398 previous_section
= now_seg
;
1399 previous_subsection
= now_subseg
;
1402 #ifdef md_elf_section_change_hook
1403 md_elf_section_change_hook ();
1407 /* Change to the *ABS* section. */
1410 obj_elf_struct (int i
)
1412 #ifdef md_flush_pending_output
1413 md_flush_pending_output ();
1416 previous_section
= now_seg
;
1417 previous_subsection
= now_subseg
;
1420 #ifdef md_elf_section_change_hook
1421 md_elf_section_change_hook ();
1426 obj_elf_subsection (int ignore ATTRIBUTE_UNUSED
)
1430 #ifdef md_flush_pending_output
1431 md_flush_pending_output ();
1434 previous_section
= now_seg
;
1435 previous_subsection
= now_subseg
;
1437 temp
= get_absolute_expression ();
1438 subseg_set (now_seg
, (subsegT
) temp
);
1439 demand_empty_rest_of_line ();
1441 #ifdef md_elf_section_change_hook
1442 md_elf_section_change_hook ();
1446 /* This can be called from the processor backends if they change
1450 obj_elf_section_change_hook (void)
1452 previous_section
= now_seg
;
1453 previous_subsection
= now_subseg
;
1457 obj_elf_previous (int ignore ATTRIBUTE_UNUSED
)
1462 if (previous_section
== 0)
1464 as_warn (_(".previous without corresponding .section; ignored"));
1468 #ifdef md_flush_pending_output
1469 md_flush_pending_output ();
1472 new_section
= previous_section
;
1473 new_subsection
= previous_subsection
;
1474 previous_section
= now_seg
;
1475 previous_subsection
= now_subseg
;
1476 subseg_set (new_section
, new_subsection
);
1478 #ifdef md_elf_section_change_hook
1479 md_elf_section_change_hook ();
1484 obj_elf_popsection (int xxx ATTRIBUTE_UNUSED
)
1486 struct section_stack
*top
= section_stack
;
1490 as_warn (_(".popsection without corresponding .pushsection; ignored"));
1494 #ifdef md_flush_pending_output
1495 md_flush_pending_output ();
1498 section_stack
= top
->next
;
1499 previous_section
= top
->prev_seg
;
1500 previous_subsection
= top
->prev_subseg
;
1501 subseg_set (top
->seg
, top
->subseg
);
1504 #ifdef md_elf_section_change_hook
1505 md_elf_section_change_hook ();
1510 obj_elf_line (int ignore ATTRIBUTE_UNUSED
)
1512 /* Assume delimiter is part of expression. BSD4.2 as fails with
1513 delightful bug, so we are not being incompatible here. */
1514 new_logical_line (NULL
, get_absolute_expression ());
1515 demand_empty_rest_of_line ();
1518 /* This handles the .symver pseudo-op, which is used to specify a
1519 symbol version. The syntax is ``.symver NAME,SYMVERNAME''.
1520 SYMVERNAME may contain ELF_VER_CHR ('@') characters. This
1521 pseudo-op causes the assembler to emit a symbol named SYMVERNAME
1522 with the same value as the symbol NAME. */
1525 obj_elf_symver (int ignore ATTRIBUTE_UNUSED
)
1532 sym
= get_sym_from_input_line_and_check ();
1534 if (*input_line_pointer
!= ',')
1536 as_bad (_("expected comma after name in .symver"));
1537 ignore_rest_of_line ();
1541 ++input_line_pointer
;
1544 /* Temporarily include '@' in symbol names. */
1545 old_lexat
= lex_type
[(unsigned char) '@'];
1546 lex_type
[(unsigned char) '@'] |= LEX_NAME
;
1547 c
= get_symbol_name (& name
);
1548 lex_type
[(unsigned char) '@'] = old_lexat
;
1550 if (S_IS_COMMON (sym
))
1552 as_bad (_("`%s' can't be versioned to common symbol '%s'"),
1553 name
, S_GET_NAME (sym
));
1554 ignore_rest_of_line ();
1558 if (symbol_get_obj (sym
)->versioned_name
== NULL
)
1560 symbol_get_obj (sym
)->versioned_name
= xstrdup (name
);
1562 (void) restore_line_pointer (c
);
1564 if (strchr (symbol_get_obj (sym
)->versioned_name
,
1565 ELF_VER_CHR
) == NULL
)
1567 as_bad (_("missing version name in `%s' for symbol `%s'"),
1568 symbol_get_obj (sym
)->versioned_name
,
1570 ignore_rest_of_line ();
1576 if (strcmp (symbol_get_obj (sym
)->versioned_name
, name
))
1578 as_bad (_("multiple versions [`%s'|`%s'] for symbol `%s'"),
1579 name
, symbol_get_obj (sym
)->versioned_name
,
1581 ignore_rest_of_line ();
1585 (void) restore_line_pointer (c
);
1588 demand_empty_rest_of_line ();
1591 /* This handles the .vtable_inherit pseudo-op, which is used to indicate
1592 to the linker the hierarchy in which a particular table resides. The
1593 syntax is ".vtable_inherit CHILDNAME, PARENTNAME". */
1596 obj_elf_get_vtable_inherit (void)
1598 char *cname
, *pname
;
1599 symbolS
*csym
, *psym
;
1602 if (*input_line_pointer
== '#')
1603 ++input_line_pointer
;
1605 c
= get_symbol_name (& cname
);
1606 csym
= symbol_find (cname
);
1608 /* GCFIXME: should check that we don't have two .vtable_inherits for
1609 the same child symbol. Also, we can currently only do this if the
1610 child symbol is already exists and is placed in a fragment. */
1612 if (csym
== NULL
|| symbol_get_frag (csym
) == NULL
)
1614 as_bad (_("expected `%s' to have already been set for .vtable_inherit"),
1619 *input_line_pointer
= c
;
1621 SKIP_WHITESPACE_AFTER_NAME ();
1622 if (*input_line_pointer
!= ',')
1624 as_bad (_("expected comma after name in .vtable_inherit"));
1625 ignore_rest_of_line ();
1629 ++input_line_pointer
;
1632 if (*input_line_pointer
== '#')
1633 ++input_line_pointer
;
1635 if (input_line_pointer
[0] == '0'
1636 && (input_line_pointer
[1] == '\0'
1637 || ISSPACE (input_line_pointer
[1])))
1639 psym
= section_symbol (absolute_section
);
1640 ++input_line_pointer
;
1644 c
= get_symbol_name (& pname
);
1645 psym
= symbol_find_or_make (pname
);
1646 restore_line_pointer (c
);
1649 demand_empty_rest_of_line ();
1654 gas_assert (symbol_get_value_expression (csym
)->X_op
== O_constant
);
1655 return fix_new (symbol_get_frag (csym
),
1656 symbol_get_value_expression (csym
)->X_add_number
,
1657 0, psym
, 0, 0, BFD_RELOC_VTABLE_INHERIT
);
1660 /* This is a version of obj_elf_get_vtable_inherit() that is
1661 suitable for use in struct _pseudo_type tables. */
1664 obj_elf_vtable_inherit (int ignore ATTRIBUTE_UNUSED
)
1666 (void) obj_elf_get_vtable_inherit ();
1669 /* This handles the .vtable_entry pseudo-op, which is used to indicate
1670 to the linker that a vtable slot was used. The syntax is
1671 ".vtable_entry tablename, offset". */
1674 obj_elf_get_vtable_entry (void)
1679 if (*input_line_pointer
== '#')
1680 ++input_line_pointer
;
1682 sym
= get_sym_from_input_line_and_check ();
1683 if (*input_line_pointer
!= ',')
1685 as_bad (_("expected comma after name in .vtable_entry"));
1686 ignore_rest_of_line ();
1690 ++input_line_pointer
;
1691 if (*input_line_pointer
== '#')
1692 ++input_line_pointer
;
1694 offset
= get_absolute_expression ();
1696 demand_empty_rest_of_line ();
1698 return fix_new (frag_now
, frag_now_fix (), 0, sym
, offset
, 0,
1699 BFD_RELOC_VTABLE_ENTRY
);
1702 /* This is a version of obj_elf_get_vtable_entry() that is
1703 suitable for use in struct _pseudo_type tables. */
1706 obj_elf_vtable_entry (int ignore ATTRIBUTE_UNUSED
)
1708 (void) obj_elf_get_vtable_entry ();
1711 #define skip_whitespace(str) do { if (*(str) == ' ') ++(str); } while (0)
1714 skip_past_char (char ** str
, char c
)
1724 #define skip_past_comma(str) skip_past_char (str, ',')
1726 /* A list of attributes that have been explicitly set by the assembly code.
1727 VENDOR is the vendor id, BASE is the tag shifted right by the number
1728 of bits in MASK, and bit N of MASK is set if tag BASE+N has been set. */
1729 struct recorded_attribute_info
{
1730 struct recorded_attribute_info
*next
;
1735 static struct recorded_attribute_info
*recorded_attributes
;
1737 /* Record that we have seen an explicit specification of attribute TAG
1738 for vendor VENDOR. */
1741 record_attribute (int vendor
, unsigned int tag
)
1745 struct recorded_attribute_info
*rai
;
1747 base
= tag
/ (8 * sizeof (rai
->mask
));
1748 mask
= 1UL << (tag
% (8 * sizeof (rai
->mask
)));
1749 for (rai
= recorded_attributes
; rai
; rai
= rai
->next
)
1750 if (rai
->vendor
== vendor
&& rai
->base
== base
)
1756 rai
= XNEW (struct recorded_attribute_info
);
1757 rai
->next
= recorded_attributes
;
1758 rai
->vendor
= vendor
;
1761 recorded_attributes
= rai
;
1764 /* Return true if we have seen an explicit specification of attribute TAG
1765 for vendor VENDOR. */
1768 obj_elf_seen_attribute (int vendor
, unsigned int tag
)
1772 struct recorded_attribute_info
*rai
;
1774 base
= tag
/ (8 * sizeof (rai
->mask
));
1775 mask
= 1UL << (tag
% (8 * sizeof (rai
->mask
)));
1776 for (rai
= recorded_attributes
; rai
; rai
= rai
->next
)
1777 if (rai
->vendor
== vendor
&& rai
->base
== base
)
1778 return (rai
->mask
& mask
) != 0;
1782 /* Parse an attribute directive for VENDOR.
1783 Returns the attribute number read, or zero on error. */
1786 obj_elf_vendor_attribute (int vendor
)
1794 /* Read the first number or name. */
1795 skip_whitespace (input_line_pointer
);
1796 s
= input_line_pointer
;
1797 if (ISDIGIT (*input_line_pointer
))
1800 if (exp
.X_op
!= O_constant
)
1802 tag
= exp
.X_add_number
;
1808 /* A name may contain '_', but no other punctuation. */
1809 for (; ISALNUM (*input_line_pointer
) || *input_line_pointer
== '_';
1810 ++input_line_pointer
)
1815 name
= xstrndup (s
, i
);
1817 #ifndef CONVERT_SYMBOLIC_ATTRIBUTE
1818 #define CONVERT_SYMBOLIC_ATTRIBUTE(a) -1
1821 tag
= CONVERT_SYMBOLIC_ATTRIBUTE (name
);
1824 as_bad (_("Attribute name not recognised: %s"), name
);
1825 ignore_rest_of_line ();
1832 type
= _bfd_elf_obj_attrs_arg_type (stdoutput
, vendor
, tag
);
1834 if (skip_past_comma (&input_line_pointer
) == -1)
1839 if (exp
.X_op
!= O_constant
)
1841 as_bad (_("expected numeric constant"));
1842 ignore_rest_of_line ();
1845 i
= exp
.X_add_number
;
1848 && skip_past_comma (&input_line_pointer
) == -1)
1850 as_bad (_("expected comma"));
1851 ignore_rest_of_line ();
1858 skip_whitespace (input_line_pointer
);
1859 if (*input_line_pointer
!= '"')
1861 s
= demand_copy_C_string (&len
);
1864 record_attribute (vendor
, tag
);
1868 bfd_elf_add_obj_attr_int_string (stdoutput
, vendor
, tag
, i
, s
);
1871 bfd_elf_add_obj_attr_string (stdoutput
, vendor
, tag
, s
);
1874 bfd_elf_add_obj_attr_int (stdoutput
, vendor
, tag
, i
);
1880 demand_empty_rest_of_line ();
1883 as_bad (_("bad string constant"));
1884 ignore_rest_of_line ();
1887 as_bad (_("expected <tag> , <value>"));
1888 ignore_rest_of_line ();
1892 /* Parse a .gnu_attribute directive. */
1895 obj_elf_gnu_attribute (int ignored ATTRIBUTE_UNUSED
)
1897 obj_elf_vendor_attribute (OBJ_ATTR_GNU
);
1901 elf_obj_read_begin_hook (void)
1903 #ifdef NEED_ECOFF_DEBUG
1904 if (ECOFF_DEBUGGING
)
1905 ecoff_read_begin_hook ();
1910 elf_obj_symbol_new_hook (symbolS
*symbolP
)
1912 struct elf_obj_sy
*sy_obj
;
1914 sy_obj
= symbol_get_obj (symbolP
);
1915 sy_obj
->size
= NULL
;
1916 sy_obj
->versioned_name
= NULL
;
1918 #ifdef NEED_ECOFF_DEBUG
1919 if (ECOFF_DEBUGGING
)
1920 ecoff_symbol_new_hook (symbolP
);
1924 /* When setting one symbol equal to another, by default we probably
1925 want them to have the same "size", whatever it means in the current
1929 elf_copy_symbol_attributes (symbolS
*dest
, symbolS
*src
)
1931 struct elf_obj_sy
*srcelf
= symbol_get_obj (src
);
1932 struct elf_obj_sy
*destelf
= symbol_get_obj (dest
);
1935 if (destelf
->size
== NULL
)
1936 destelf
->size
= XNEW (expressionS
);
1937 *destelf
->size
= *srcelf
->size
;
1941 if (destelf
->size
!= NULL
)
1942 free (destelf
->size
);
1943 destelf
->size
= NULL
;
1945 S_SET_SIZE (dest
, S_GET_SIZE (src
));
1946 /* Don't copy visibility. */
1947 S_SET_OTHER (dest
, (ELF_ST_VISIBILITY (S_GET_OTHER (dest
))
1948 | (S_GET_OTHER (src
) & ~ELF_ST_VISIBILITY (-1))));
1952 obj_elf_version (int ignore ATTRIBUTE_UNUSED
)
1957 asection
*seg
= now_seg
;
1958 subsegT subseg
= now_subseg
;
1959 Elf_Internal_Note i_note
;
1960 Elf_External_Note e_note
;
1961 asection
*note_secp
= NULL
;
1964 if (*input_line_pointer
== '\"')
1968 ++input_line_pointer
; /* -> 1st char of string. */
1969 name
= input_line_pointer
;
1971 while (is_a_char (c
= next_char_of_string ()))
1973 c
= *input_line_pointer
;
1974 *input_line_pointer
= '\0';
1975 *(input_line_pointer
- 1) = '\0';
1976 *input_line_pointer
= c
;
1978 /* Create the .note section. */
1979 note_secp
= subseg_new (".note", 0);
1980 bfd_set_section_flags (note_secp
, SEC_HAS_CONTENTS
| SEC_READONLY
);
1981 record_alignment (note_secp
, 2);
1983 /* Process the version string. */
1984 len
= strlen (name
) + 1;
1986 /* PR 3456: Although the name field is padded out to an 4-byte
1987 boundary, the namesz field should not be adjusted. */
1988 i_note
.namesz
= len
;
1989 i_note
.descsz
= 0; /* No description. */
1990 i_note
.type
= NT_VERSION
;
1991 p
= frag_more (sizeof (e_note
.namesz
));
1992 md_number_to_chars (p
, i_note
.namesz
, sizeof (e_note
.namesz
));
1993 p
= frag_more (sizeof (e_note
.descsz
));
1994 md_number_to_chars (p
, i_note
.descsz
, sizeof (e_note
.descsz
));
1995 p
= frag_more (sizeof (e_note
.type
));
1996 md_number_to_chars (p
, i_note
.type
, sizeof (e_note
.type
));
1997 p
= frag_more (len
);
1998 memcpy (p
, name
, len
);
2000 frag_align (2, 0, 0);
2002 subseg_set (seg
, subseg
);
2005 as_bad (_("expected quoted string"));
2007 demand_empty_rest_of_line ();
2011 obj_elf_size (int ignore ATTRIBUTE_UNUSED
)
2014 char c
= get_symbol_name (&name
);
2019 p
= input_line_pointer
;
2021 SKIP_WHITESPACE_AFTER_NAME ();
2022 if (*input_line_pointer
!= ',')
2025 as_bad (_("expected comma after name `%s' in .size directive"), name
);
2027 ignore_rest_of_line ();
2030 input_line_pointer
++;
2032 if (exp
.X_op
== O_absent
)
2034 as_bad (_("missing expression in .size directive"));
2035 exp
.X_op
= O_constant
;
2036 exp
.X_add_number
= 0;
2039 sym
= symbol_find_or_make (name
);
2041 if (exp
.X_op
== O_constant
)
2043 S_SET_SIZE (sym
, exp
.X_add_number
);
2044 if (symbol_get_obj (sym
)->size
)
2046 xfree (symbol_get_obj (sym
)->size
);
2047 symbol_get_obj (sym
)->size
= NULL
;
2052 symbol_get_obj (sym
)->size
= XNEW (expressionS
);
2053 *symbol_get_obj (sym
)->size
= exp
;
2055 demand_empty_rest_of_line ();
2058 /* Handle the ELF .type pseudo-op. This sets the type of a symbol.
2059 There are six syntaxes:
2061 The first (used on Solaris) is
2063 The second (used on UnixWare) is
2065 The third (reportedly to be used on Irix 6.0) is
2067 The fourth (used on NetBSD/Arm and Linux/ARM) is
2069 The fifth (used on SVR4/860) is
2070 .type SYM,"function"
2071 The sixth (emitted by recent SunPRO under Solaris) is
2073 where the integer is the STT_* value.
2077 obj_elf_type_name (char *cp
)
2081 p
= input_line_pointer
;
2082 if (*input_line_pointer
>= '0'
2083 && *input_line_pointer
<= '9')
2085 while (*input_line_pointer
>= '0'
2086 && *input_line_pointer
<= '9')
2087 ++input_line_pointer
;
2088 *cp
= *input_line_pointer
;
2089 *input_line_pointer
= '\0';
2092 *cp
= get_symbol_name (&p
);
2098 obj_elf_type (int ignore ATTRIBUTE_UNUSED
)
2102 const char *type_name
;
2104 elf_symbol_type
*elfsym
;
2106 sym
= get_sym_from_input_line_and_check ();
2107 c
= *input_line_pointer
;
2108 elfsym
= (elf_symbol_type
*) symbol_get_bfdsym (sym
);
2110 if (*input_line_pointer
== ',')
2111 ++input_line_pointer
;
2114 if ( *input_line_pointer
== '#'
2115 || *input_line_pointer
== '@'
2116 || *input_line_pointer
== '"'
2117 || *input_line_pointer
== '%')
2118 ++input_line_pointer
;
2120 type_name
= obj_elf_type_name (& c
);
2123 if (strcmp (type_name
, "function") == 0
2124 || strcmp (type_name
, "2") == 0
2125 || strcmp (type_name
, "STT_FUNC") == 0)
2126 type
= BSF_FUNCTION
;
2127 else if (strcmp (type_name
, "object") == 0
2128 || strcmp (type_name
, "1") == 0
2129 || strcmp (type_name
, "STT_OBJECT") == 0)
2131 else if (strcmp (type_name
, "tls_object") == 0
2132 || strcmp (type_name
, "6") == 0
2133 || strcmp (type_name
, "STT_TLS") == 0)
2134 type
= BSF_OBJECT
| BSF_THREAD_LOCAL
;
2135 else if (strcmp (type_name
, "notype") == 0
2136 || strcmp (type_name
, "0") == 0
2137 || strcmp (type_name
, "STT_NOTYPE") == 0)
2139 else if (strcmp (type_name
, "common") == 0
2140 || strcmp (type_name
, "5") == 0
2141 || strcmp (type_name
, "STT_COMMON") == 0)
2145 if (! S_IS_COMMON (sym
))
2147 if (S_IS_VOLATILE (sym
))
2149 sym
= symbol_clone (sym
, 1);
2150 S_SET_SEGMENT (sym
, bfd_com_section_ptr
);
2151 S_SET_VALUE (sym
, 0);
2152 S_SET_EXTERNAL (sym
);
2153 symbol_set_frag (sym
, &zero_address_frag
);
2154 S_CLEAR_VOLATILE (sym
);
2156 else if (S_IS_DEFINED (sym
) || symbol_equated_p (sym
))
2157 as_bad (_("symbol '%s' is already defined"), S_GET_NAME (sym
));
2160 /* FIXME: Is it safe to just change the section ? */
2161 S_SET_SEGMENT (sym
, bfd_com_section_ptr
);
2162 S_SET_VALUE (sym
, 0);
2163 S_SET_EXTERNAL (sym
);
2167 else if (strcmp (type_name
, "gnu_indirect_function") == 0
2168 || strcmp (type_name
, "10") == 0
2169 || strcmp (type_name
, "STT_GNU_IFUNC") == 0)
2171 struct elf_backend_data
*bed
;
2173 bed
= (struct elf_backend_data
*) get_elf_backend_data (stdoutput
);
2174 if (bed
->elf_osabi
== ELFOSABI_NONE
)
2175 bed
->elf_osabi
= ELFOSABI_GNU
;
2176 else if (bed
->elf_osabi
!= ELFOSABI_GNU
2177 && bed
->elf_osabi
!= ELFOSABI_FREEBSD
)
2178 as_bad (_("symbol type \"%s\" is supported only by GNU "
2179 "and FreeBSD targets"), type_name
);
2180 /* MIPS targets do not support IFUNCS. */
2181 else if (bed
->target_id
== MIPS_ELF_DATA
)
2182 as_bad (_("symbol type \"%s\" is not supported by "
2183 "MIPS targets"), type_name
);
2184 elf_tdata (stdoutput
)->has_gnu_osabi
|= elf_gnu_osabi_ifunc
;
2185 type
= BSF_FUNCTION
| BSF_GNU_INDIRECT_FUNCTION
;
2187 else if (strcmp (type_name
, "gnu_unique_object") == 0)
2189 struct elf_backend_data
*bed
;
2191 bed
= (struct elf_backend_data
*) get_elf_backend_data (stdoutput
);
2192 if (bed
->elf_osabi
== ELFOSABI_NONE
)
2193 bed
->elf_osabi
= ELFOSABI_GNU
;
2194 else if (bed
->elf_osabi
!= ELFOSABI_GNU
)
2195 as_bad (_("symbol type \"%s\" is supported only by GNU targets"),
2197 elf_tdata (stdoutput
)->has_gnu_osabi
|= elf_gnu_osabi_unique
;
2198 type
= BSF_OBJECT
| BSF_GNU_UNIQUE
;
2200 #ifdef md_elf_symbol_type
2201 else if ((type
= md_elf_symbol_type (type_name
, sym
, elfsym
)) != -1)
2205 as_bad (_("unrecognized symbol type \"%s\""), type_name
);
2207 *input_line_pointer
= c
;
2209 if (*input_line_pointer
== '"')
2210 ++input_line_pointer
;
2212 #ifdef md_elf_symbol_type_change
2213 if (!md_elf_symbol_type_change (sym
, elfsym
, type
))
2216 flagword mask
= BSF_FUNCTION
| BSF_OBJECT
;
2218 if (type
!= BSF_FUNCTION
)
2219 mask
|= BSF_GNU_INDIRECT_FUNCTION
;
2220 if (type
!= BSF_OBJECT
)
2222 mask
|= BSF_GNU_UNIQUE
| BSF_THREAD_LOCAL
;
2224 if (S_IS_COMMON (sym
))
2226 as_bad (_("cannot change type of common symbol '%s'"),
2232 /* Don't warn when changing to STT_NOTYPE. */
2235 flagword
new = (elfsym
->symbol
.flags
& ~mask
) | type
;
2237 if (new != (elfsym
->symbol
.flags
| type
))
2238 as_warn (_("symbol '%s' already has its type set"), S_GET_NAME (sym
));
2239 elfsym
->symbol
.flags
= new;
2242 elfsym
->symbol
.flags
&= ~mask
;
2245 demand_empty_rest_of_line ();
2249 obj_elf_ident (int ignore ATTRIBUTE_UNUSED
)
2251 static segT comment_section
;
2252 segT old_section
= now_seg
;
2253 int old_subsection
= now_subseg
;
2255 #ifdef md_flush_pending_output
2256 md_flush_pending_output ();
2259 if (!comment_section
)
2262 comment_section
= subseg_new (".comment", 0);
2263 bfd_set_section_flags (comment_section
, (SEC_READONLY
| SEC_HAS_CONTENTS
2264 | SEC_MERGE
| SEC_STRINGS
));
2265 comment_section
->entsize
= 1;
2266 #ifdef md_elf_section_change_hook
2267 md_elf_section_change_hook ();
2273 subseg_set (comment_section
, 0);
2275 subseg_set (old_section
, old_subsection
);
2278 #ifdef INIT_STAB_SECTION
2280 /* The first entry in a .stabs section is special. */
2283 obj_elf_init_stab_section (segT seg
)
2288 unsigned int stroff
;
2290 /* Force the section to align to a longword boundary. Without this,
2291 UnixWare ar crashes. */
2292 bfd_set_section_alignment (seg
, 2);
2294 /* Make space for this first symbol. */
2298 file
= as_where (NULL
);
2299 stabstr_name
= concat (segment_name (seg
), "str", (char *) NULL
);
2300 stroff
= get_stab_string_offset (file
, stabstr_name
, TRUE
);
2301 know (stroff
== 1 || (stroff
== 0 && file
[0] == '\0'));
2302 md_number_to_chars (p
, stroff
, 4);
2303 seg_info (seg
)->stabu
.p
= p
;
2308 /* Fill in the counts in the first entry in a .stabs section. */
2311 adjust_stab_sections (bfd
*abfd
, asection
*sec
, void *xxx ATTRIBUTE_UNUSED
)
2318 if (strncmp (".stab", sec
->name
, 5))
2320 if (!strcmp ("str", sec
->name
+ strlen (sec
->name
) - 3))
2323 name
= concat (sec
->name
, "str", NULL
);
2324 strsec
= bfd_get_section_by_name (abfd
, name
);
2326 strsz
= bfd_section_size (strsec
);
2329 nsyms
= bfd_section_size (sec
) / 12 - 1;
2331 p
= seg_info (sec
)->stabu
.p
;
2332 gas_assert (p
!= 0);
2334 bfd_h_put_16 (abfd
, nsyms
, p
+ 6);
2335 bfd_h_put_32 (abfd
, strsz
, p
+ 8);
2339 #ifdef NEED_ECOFF_DEBUG
2341 /* This function is called by the ECOFF code. It is supposed to
2342 record the external symbol information so that the backend can
2343 write it out correctly. The ELF backend doesn't actually handle
2344 this at the moment, so we do it ourselves. We save the information
2347 #ifdef OBJ_MAYBE_ELF
2351 elf_ecoff_set_ext (symbolS
*sym
, struct ecoff_extr
*ext
)
2353 symbol_get_bfdsym (sym
)->udata
.p
= ext
;
2356 /* This function is called by bfd_ecoff_debug_externals. It is
2357 supposed to *EXT to the external symbol information, and return
2358 whether the symbol should be used at all. */
2361 elf_get_extr (asymbol
*sym
, EXTR
*ext
)
2363 if (sym
->udata
.p
== NULL
)
2365 *ext
= *(EXTR
*) sym
->udata
.p
;
2369 /* This function is called by bfd_ecoff_debug_externals. It has
2370 nothing to do for ELF. */
2373 elf_set_index (asymbol
*sym ATTRIBUTE_UNUSED
,
2374 bfd_size_type indx ATTRIBUTE_UNUSED
)
2378 #endif /* NEED_ECOFF_DEBUG */
2381 elf_frob_symbol (symbolS
*symp
, int *puntp
)
2383 struct elf_obj_sy
*sy_obj
;
2386 #ifdef NEED_ECOFF_DEBUG
2387 if (ECOFF_DEBUGGING
)
2388 ecoff_frob_symbol (symp
);
2391 sy_obj
= symbol_get_obj (symp
);
2393 size
= sy_obj
->size
;
2396 if (resolve_expression (size
)
2397 && size
->X_op
== O_constant
)
2398 S_SET_SIZE (symp
, size
->X_add_number
);
2401 if (!flag_allow_nonconst_size
)
2402 as_bad (_(".size expression for %s "
2403 "does not evaluate to a constant"), S_GET_NAME (symp
));
2405 as_warn (_(".size expression for %s "
2406 "does not evaluate to a constant"), S_GET_NAME (symp
));
2408 free (sy_obj
->size
);
2409 sy_obj
->size
= NULL
;
2412 if (sy_obj
->versioned_name
!= NULL
)
2416 p
= strchr (sy_obj
->versioned_name
, ELF_VER_CHR
);
2418 /* We will have already reported an error about a missing version. */
2421 /* This symbol was given a new name with the .symver directive.
2423 If this is an external reference, just rename the symbol to
2424 include the version string. This will make the relocs be
2425 against the correct versioned symbol.
2427 If this is a definition, add an alias. FIXME: Using an alias
2428 will permit the debugging information to refer to the right
2429 symbol. However, it's not clear whether it is the best
2432 else if (! S_IS_DEFINED (symp
))
2434 /* Verify that the name isn't using the @@ syntax--this is
2435 reserved for definitions of the default version to link
2437 if (p
[1] == ELF_VER_CHR
)
2439 as_bad (_("invalid attempt to declare external version name"
2440 " as default in symbol `%s'"),
2441 sy_obj
->versioned_name
);
2444 S_SET_NAME (symp
, sy_obj
->versioned_name
);
2448 if (p
[1] == ELF_VER_CHR
&& p
[2] == ELF_VER_CHR
)
2452 /* The @@@ syntax is a special case. It renames the
2453 symbol name to versioned_name with one `@' removed. */
2454 l
= strlen (&p
[3]) + 1;
2455 memmove (&p
[2], &p
[3], l
);
2456 S_SET_NAME (symp
, sy_obj
->versioned_name
);
2462 /* FIXME: Creating a new symbol here is risky. We're
2463 in the final loop over the symbol table. We can
2464 get away with it only because the symbol goes to
2465 the end of the list, where the loop will still see
2466 it. It would probably be better to do this in
2467 obj_frob_file_before_adjust. */
2469 symp2
= symbol_find_or_make (sy_obj
->versioned_name
);
2471 /* Now we act as though we saw symp2 = sym. */
2472 if (S_IS_COMMON (symp
))
2474 as_bad (_("`%s' can't be versioned to common symbol '%s'"),
2475 sy_obj
->versioned_name
, S_GET_NAME (symp
));
2480 S_SET_SEGMENT (symp2
, S_GET_SEGMENT (symp
));
2482 /* Subtracting out the frag address here is a hack
2483 because we are in the middle of the final loop. */
2486 - symbol_get_frag (symp
)->fr_address
));
2488 symbol_set_frag (symp2
, symbol_get_frag (symp
));
2490 /* This will copy over the size information. */
2491 copy_symbol_attributes (symp2
, symp
);
2493 S_SET_OTHER (symp2
, S_GET_OTHER (symp
));
2495 if (S_IS_WEAK (symp
))
2498 if (S_IS_EXTERNAL (symp
))
2499 S_SET_EXTERNAL (symp2
);
2504 /* Double check weak symbols. */
2505 if (S_IS_WEAK (symp
))
2507 if (S_IS_COMMON (symp
))
2508 as_bad (_("symbol `%s' can not be both weak and common"),
2515 asection
**head
; /* Section lists. */
2516 unsigned int num_group
; /* Number of lists. */
2517 struct hash_control
*indexes
; /* Maps group name to index in head array. */
2520 static struct group_list groups
;
2522 /* Called via bfd_map_over_sections. If SEC is a member of a group,
2523 add it to a list of sections belonging to the group. INF is a
2524 pointer to a struct group_list, which is where we store the head of
2525 each list. If its link_to_symbol_name isn't NULL, set up its
2526 linked-to section. */
2529 build_additional_section_info (bfd
*abfd ATTRIBUTE_UNUSED
,
2530 asection
*sec
, void *inf
)
2532 struct group_list
*list
= (struct group_list
*) inf
;
2533 const char *group_name
= elf_group_name (sec
);
2535 unsigned int *elem_idx
;
2536 unsigned int *idx_ptr
;
2538 if (sec
->map_head
.linked_to_symbol_name
)
2540 symbolS
*linked_to_sym
;
2541 linked_to_sym
= symbol_find (sec
->map_head
.linked_to_symbol_name
);
2542 if (!linked_to_sym
|| !S_IS_DEFINED (linked_to_sym
))
2543 as_bad (_("undefined linked-to symbol `%s' on section `%s'"),
2544 sec
->map_head
.linked_to_symbol_name
,
2545 bfd_section_name (sec
));
2547 elf_linked_to_section (sec
) = S_GET_SEGMENT (linked_to_sym
);
2550 if (group_name
== NULL
)
2553 /* If this group already has a list, add the section to the head of
2555 elem_idx
= (unsigned int *) hash_find (list
->indexes
, group_name
);
2556 if (elem_idx
!= NULL
)
2558 elf_next_in_group (sec
) = list
->head
[*elem_idx
];
2559 list
->head
[*elem_idx
] = sec
;
2563 /* New group. Make the arrays bigger in chunks to minimize calls to
2565 i
= list
->num_group
;
2568 unsigned int newsize
= i
+ 128;
2569 list
->head
= XRESIZEVEC (asection
*, list
->head
, newsize
);
2571 list
->head
[i
] = sec
;
2572 list
->num_group
+= 1;
2574 /* Add index to hash. */
2575 idx_ptr
= XNEW (unsigned int);
2577 hash_insert (list
->indexes
, group_name
, idx_ptr
);
2580 static void free_section_idx (const char *key ATTRIBUTE_UNUSED
, void *val
)
2582 free ((unsigned int *) val
);
2585 /* Create symbols for group signature. */
2588 elf_adjust_symtab (void)
2592 /* Go find section groups. */
2593 groups
.num_group
= 0;
2595 groups
.indexes
= hash_new ();
2596 bfd_map_over_sections (stdoutput
, build_additional_section_info
,
2599 /* Make the SHT_GROUP sections that describe each section group. We
2600 can't set up the section contents here yet, because elf section
2601 indices have yet to be calculated. elf.c:set_group_contents does
2602 the rest of the work. */
2603 for (i
= 0; i
< groups
.num_group
; i
++)
2605 const char *group_name
= elf_group_name (groups
.head
[i
]);
2606 const char *sec_name
;
2611 flags
= SEC_READONLY
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
| SEC_GROUP
;
2612 for (s
= groups
.head
[i
]; s
!= NULL
; s
= elf_next_in_group (s
))
2613 if ((s
->flags
^ flags
) & SEC_LINK_ONCE
)
2615 flags
|= SEC_LINK_ONCE
| SEC_LINK_DUPLICATES_DISCARD
;
2616 if (s
!= groups
.head
[i
])
2618 as_warn (_("assuming all members of group `%s' are COMDAT"),
2624 sec_name
= ".group";
2625 s
= subseg_force_new (sec_name
, 0);
2627 || !bfd_set_section_flags (s
, flags
)
2628 || !bfd_set_section_alignment (s
, 2))
2630 as_fatal (_("can't create group: %s"),
2631 bfd_errmsg (bfd_get_error ()));
2633 elf_section_type (s
) = SHT_GROUP
;
2635 /* Pass a pointer to the first section in this group. */
2636 elf_next_in_group (s
) = groups
.head
[i
];
2637 elf_sec_group (groups
.head
[i
]) = s
;
2638 /* Make sure that the signature symbol for the group has the
2639 name of the group. */
2640 sy
= symbol_find_exact (group_name
);
2641 if (!sy
|| !symbol_on_chain (sy
, symbol_rootP
, symbol_lastP
))
2643 /* Create the symbol now. */
2644 sy
= symbol_new (group_name
, now_seg
, (valueT
) 0, frag_now
);
2646 /* Before Solaris 11 build 154, Sun ld rejects local group
2647 signature symbols, so make them weak hidden instead. */
2648 symbol_get_bfdsym (sy
)->flags
|= BSF_WEAK
;
2649 S_SET_OTHER (sy
, STV_HIDDEN
);
2651 symbol_get_obj (sy
)->local
= 1;
2653 symbol_table_insert (sy
);
2655 elf_group_id (s
) = symbol_get_bfdsym (sy
);
2660 elf_frob_file (void)
2662 bfd_map_over_sections (stdoutput
, adjust_stab_sections
, NULL
);
2664 #ifdef elf_tc_final_processing
2665 elf_tc_final_processing ();
2669 /* It removes any unneeded versioned symbols from the symbol table. */
2672 elf_frob_file_before_adjust (void)
2678 for (symp
= symbol_rootP
; symp
; symp
= symbol_next (symp
))
2679 if (!S_IS_DEFINED (symp
))
2681 if (symbol_get_obj (symp
)->versioned_name
)
2685 /* The @@@ syntax is a special case. If the symbol is
2686 not defined, 2 `@'s will be removed from the
2689 p
= strchr (symbol_get_obj (symp
)->versioned_name
,
2691 if (p
!= NULL
&& p
[1] == ELF_VER_CHR
&& p
[2] == ELF_VER_CHR
)
2693 size_t l
= strlen (&p
[3]) + 1;
2694 memmove (&p
[1], &p
[3], l
);
2696 if (symbol_used_p (symp
) == 0
2697 && symbol_used_in_reloc_p (symp
) == 0)
2698 symbol_remove (symp
, &symbol_rootP
, &symbol_lastP
);
2701 /* If there was .weak foo, but foo was neither defined nor
2702 used anywhere, remove it. */
2704 else if (S_IS_WEAK (symp
)
2705 && symbol_used_p (symp
) == 0
2706 && symbol_used_in_reloc_p (symp
) == 0)
2707 symbol_remove (symp
, &symbol_rootP
, &symbol_lastP
);
2712 /* It is required that we let write_relocs have the opportunity to
2713 optimize away fixups before output has begun, since it is possible
2714 to eliminate all fixups for a section and thus we never should
2715 have generated the relocation section. */
2718 elf_frob_file_after_relocs (void)
2722 /* Set SHT_GROUP section size. */
2723 for (i
= 0; i
< groups
.num_group
; i
++)
2725 asection
*s
, *head
, *group
;
2728 head
= groups
.head
[i
];
2730 for (s
= head
; s
!= NULL
; s
= elf_next_in_group (s
))
2731 size
+= (s
->flags
& SEC_RELOC
) != 0 ? 8 : 4;
2733 group
= elf_sec_group (head
);
2734 subseg_set (group
, 0);
2735 bfd_set_section_size (group
, size
);
2736 group
->contents
= (unsigned char *) frag_more (size
);
2737 frag_now
->fr_fix
= frag_now_fix_octets ();
2738 frag_wane (frag_now
);
2742 hash_traverse (groups
.indexes
, free_section_idx
);
2743 hash_die (groups
.indexes
);
2745 #ifdef NEED_ECOFF_DEBUG
2746 if (ECOFF_DEBUGGING
)
2747 /* Generate the ECOFF debugging information. */
2749 const struct ecoff_debug_swap
*debug_swap
;
2750 struct ecoff_debug_info debug
;
2755 = get_elf_backend_data (stdoutput
)->elf_backend_ecoff_debug_swap
;
2756 know (debug_swap
!= NULL
);
2757 ecoff_build_debug (&debug
.symbolic_header
, &buf
, debug_swap
);
2759 /* Set up the pointers in debug. */
2760 #define SET(ptr, offset, type) \
2761 debug.ptr = (type) (buf + debug.symbolic_header.offset)
2763 SET (line
, cbLineOffset
, unsigned char *);
2764 SET (external_dnr
, cbDnOffset
, void *);
2765 SET (external_pdr
, cbPdOffset
, void *);
2766 SET (external_sym
, cbSymOffset
, void *);
2767 SET (external_opt
, cbOptOffset
, void *);
2768 SET (external_aux
, cbAuxOffset
, union aux_ext
*);
2769 SET (ss
, cbSsOffset
, char *);
2770 SET (external_fdr
, cbFdOffset
, void *);
2771 SET (external_rfd
, cbRfdOffset
, void *);
2772 /* ssext and external_ext are set up just below. */
2776 /* Set up the external symbols. */
2777 debug
.ssext
= debug
.ssext_end
= NULL
;
2778 debug
.external_ext
= debug
.external_ext_end
= NULL
;
2779 if (! bfd_ecoff_debug_externals (stdoutput
, &debug
, debug_swap
, TRUE
,
2780 elf_get_extr
, elf_set_index
))
2781 as_fatal (_("failed to set up debugging information: %s"),
2782 bfd_errmsg (bfd_get_error ()));
2784 sec
= bfd_get_section_by_name (stdoutput
, ".mdebug");
2785 gas_assert (sec
!= NULL
);
2787 know (!stdoutput
->output_has_begun
);
2789 /* We set the size of the section, call bfd_set_section_contents
2790 to force the ELF backend to allocate a file position, and then
2791 write out the data. FIXME: Is this really the best way to do
2793 bfd_set_section_size (sec
, bfd_ecoff_debug_size (stdoutput
, &debug
,
2796 /* Pass BUF to bfd_set_section_contents because this will
2797 eventually become a call to fwrite, and ISO C prohibits
2798 passing a NULL pointer to a stdio function even if the
2799 pointer will not be used. */
2800 if (! bfd_set_section_contents (stdoutput
, sec
, buf
, 0, 0))
2801 as_fatal (_("can't start writing .mdebug section: %s"),
2802 bfd_errmsg (bfd_get_error ()));
2804 know (stdoutput
->output_has_begun
);
2805 know (sec
->filepos
!= 0);
2807 if (! bfd_ecoff_write_debug (stdoutput
, &debug
, debug_swap
,
2809 as_fatal (_("could not write .mdebug section: %s"),
2810 bfd_errmsg (bfd_get_error ()));
2812 #endif /* NEED_ECOFF_DEBUG */
2816 elf_generate_asm_lineno (void)
2818 #ifdef NEED_ECOFF_DEBUG
2819 if (ECOFF_DEBUGGING
)
2820 ecoff_generate_asm_lineno ();
2825 elf_process_stab (segT sec ATTRIBUTE_UNUSED
,
2826 int what ATTRIBUTE_UNUSED
,
2827 const char *string ATTRIBUTE_UNUSED
,
2828 int type ATTRIBUTE_UNUSED
,
2829 int other ATTRIBUTE_UNUSED
,
2830 int desc ATTRIBUTE_UNUSED
)
2832 #ifdef NEED_ECOFF_DEBUG
2833 if (ECOFF_DEBUGGING
)
2834 ecoff_stab (sec
, what
, string
, type
, other
, desc
);
2839 elf_separate_stab_sections (void)
2841 #ifdef NEED_ECOFF_DEBUG
2842 return (!ECOFF_DEBUGGING
);
2849 elf_init_stab_section (segT seg
)
2851 #ifdef NEED_ECOFF_DEBUG
2852 if (!ECOFF_DEBUGGING
)
2854 obj_elf_init_stab_section (seg
);
2857 const struct format_ops elf_format_ops
=
2859 bfd_target_elf_flavour
,
2860 0, /* dfl_leading_underscore */
2861 1, /* emit_section_symbols */
2866 elf_frob_file_before_adjust
,
2867 0, /* obj_frob_file_before_fix */
2868 elf_frob_file_after_relocs
,
2869 elf_s_get_size
, elf_s_set_size
,
2870 elf_s_get_align
, elf_s_set_align
,
2877 elf_copy_symbol_attributes
,
2878 elf_generate_asm_lineno
,
2880 elf_separate_stab_sections
,
2881 elf_init_stab_section
,
2882 elf_sec_sym_ok_for_reloc
,
2884 #ifdef NEED_ECOFF_DEBUG
2887 0, /* ecoff_set_ext */
2889 elf_obj_read_begin_hook
,
2890 elf_obj_symbol_new_hook
,