1 /* ELF object file format
2 Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003 Free Software Foundation, Inc.
5 This file is part of GAS, the GNU Assembler.
7 GAS is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as
9 published by the Free Software Foundation; either version 2,
10 or (at your option) any later version.
12 GAS is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 the GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GAS; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
22 #define OBJ_HEADER "obj-elf.h"
24 #include "safe-ctype.h"
27 #include "struc-symbol.h"
29 #ifndef ECOFF_DEBUGGING
30 #define ECOFF_DEBUGGING 0
32 #define NEED_ECOFF_DEBUG
35 #ifdef NEED_ECOFF_DEBUG
40 #include "elf/alpha.h"
55 static bfd_vma elf_s_get_size PARAMS ((symbolS *));
56 static void elf_s_set_size PARAMS ((symbolS *, bfd_vma));
57 static bfd_vma elf_s_get_align PARAMS ((symbolS *));
58 static void elf_s_set_align PARAMS ((symbolS *, bfd_vma));
59 static void elf_s_set_other PARAMS ((symbolS *, int));
60 static int elf_sec_sym_ok_for_reloc PARAMS ((asection *));
61 static void adjust_stab_sections PARAMS ((bfd *, asection *, PTR));
62 static void build_group_lists PARAMS ((bfd *, asection *, PTR));
63 static int elf_separate_stab_sections PARAMS ((void));
64 static void elf_init_stab_section PARAMS ((segT));
65 static symbolS *elf_common PARAMS ((int));
67 #ifdef NEED_ECOFF_DEBUG
68 static bfd_boolean elf_get_extr PARAMS ((asymbol *, EXTR *));
69 static void elf_set_index PARAMS ((asymbol *, bfd_size_type));
72 static void obj_elf_line PARAMS ((int));
73 void obj_elf_version PARAMS ((int));
74 static void obj_elf_size PARAMS ((int));
75 static void obj_elf_type PARAMS ((int));
76 static void obj_elf_ident PARAMS ((int));
77 static void obj_elf_weak PARAMS ((int));
78 static void obj_elf_local PARAMS ((int));
79 static void obj_elf_visibility PARAMS ((int));
80 static int obj_elf_parse_section_letters PARAMS ((char *, size_t));
81 static int obj_elf_section_word PARAMS ((char *, size_t));
82 static char *obj_elf_section_name PARAMS ((void));
83 static int obj_elf_section_type PARAMS ((char *, size_t));
84 static void obj_elf_symver PARAMS ((int));
85 static void obj_elf_subsection PARAMS ((int));
86 static void obj_elf_popsection PARAMS ((int));
87 static void obj_elf_tls_common PARAMS ((int));
89 static const pseudo_typeS elf_pseudo_table[] =
91 {"comm", obj_elf_common, 0},
92 {"common", obj_elf_common, 1},
93 {"ident", obj_elf_ident, 0},
94 {"local", obj_elf_local, 0},
95 {"previous", obj_elf_previous, 0},
96 {"section", obj_elf_section, 0},
97 {"section.s", obj_elf_section, 0},
98 {"sect", obj_elf_section, 0},
99 {"sect.s", obj_elf_section, 0},
100 {"pushsection", obj_elf_section, 1},
101 {"popsection", obj_elf_popsection, 0},
102 {"size", obj_elf_size, 0},
103 {"type", obj_elf_type, 0},
104 {"version", obj_elf_version, 0},
105 {"weak", obj_elf_weak, 0},
107 /* These define symbol visibility. */
108 {"internal", obj_elf_visibility, STV_INTERNAL},
109 {"hidden", obj_elf_visibility, STV_HIDDEN},
110 {"protected", obj_elf_visibility, STV_PROTECTED},
112 /* These are used for stabs-in-elf configurations. */
113 {"line", obj_elf_line, 0},
115 /* This is a GNU extension to handle symbol versions. */
116 {"symver", obj_elf_symver, 0},
118 /* A GNU extension to change subsection only. */
119 {"subsection", obj_elf_subsection, 0},
121 /* These are GNU extensions to aid in garbage collecting C++ vtables. */
122 {"vtable_inherit", (void (*) PARAMS ((int))) &obj_elf_vtable_inherit, 0},
123 {"vtable_entry", (void (*) PARAMS ((int))) &obj_elf_vtable_entry, 0},
125 /* These are used for dwarf. */
130 /* We need to trap the section changing calls to handle .previous. */
131 {"data", obj_elf_data, 0},
132 {"text", obj_elf_text, 0},
134 {"tls_common", obj_elf_tls_common, 0},
140 static const pseudo_typeS ecoff_debug_pseudo_table[] =
142 #ifdef NEED_ECOFF_DEBUG
143 /* COFF style debugging information for ECOFF. .ln is not used; .loc
145 { "def", ecoff_directive_def, 0 },
146 { "dim", ecoff_directive_dim, 0 },
147 { "endef", ecoff_directive_endef, 0 },
148 { "file", ecoff_directive_file, 0 },
149 { "scl", ecoff_directive_scl, 0 },
150 { "tag", ecoff_directive_tag, 0 },
151 { "val", ecoff_directive_val, 0 },
153 /* COFF debugging requires pseudo-ops .size and .type, but ELF
154 already has meanings for those. We use .esize and .etype
155 instead. These are only generated by gcc anyhow. */
156 { "esize", ecoff_directive_size, 0 },
157 { "etype", ecoff_directive_type, 0 },
159 /* ECOFF specific debugging information. */
160 { "begin", ecoff_directive_begin, 0 },
161 { "bend", ecoff_directive_bend, 0 },
162 { "end", ecoff_directive_end, 0 },
163 { "ent", ecoff_directive_ent, 0 },
164 { "fmask", ecoff_directive_fmask, 0 },
165 { "frame", ecoff_directive_frame, 0 },
166 { "loc", ecoff_directive_loc, 0 },
167 { "mask", ecoff_directive_mask, 0 },
169 /* Other ECOFF directives. */
170 { "extern", ecoff_directive_extern, 0 },
172 /* These are used on Irix. I don't know how to implement them. */
173 { "alias", s_ignore, 0 },
174 { "bgnb", s_ignore, 0 },
175 { "endb", s_ignore, 0 },
176 { "lab", s_ignore, 0 },
177 { "noalias", s_ignore, 0 },
178 { "verstamp", s_ignore, 0 },
179 { "vreg", s_ignore, 0 },
182 {NULL, NULL, 0} /* end sentinel */
186 #include "aout/aout64.h"
188 /* This is called when the assembler starts. */
193 /* Add symbols for the known sections to the symbol table. */
194 symbol_table_insert (section_symbol (bfd_get_section_by_name (stdoutput,
195 TEXT_SECTION_NAME)));
196 symbol_table_insert (section_symbol (bfd_get_section_by_name (stdoutput,
197 DATA_SECTION_NAME)));
198 symbol_table_insert (section_symbol (bfd_get_section_by_name (stdoutput,
205 pop_insert (elf_pseudo_table);
207 pop_insert (ecoff_debug_pseudo_table);
214 return S_GET_SIZE (sym);
218 elf_s_set_size (sym, sz)
222 S_SET_SIZE (sym, sz);
226 elf_s_get_align (sym)
229 return S_GET_ALIGN (sym);
233 elf_s_set_align (sym, align)
237 S_SET_ALIGN (sym, align);
241 elf_s_get_other (sym)
244 return elf_symbol (symbol_get_bfdsym (sym))->internal_elf_sym.st_other;
248 elf_s_set_other (sym, other)
252 S_SET_OTHER (sym, other);
256 elf_sec_sym_ok_for_reloc (sec)
259 return obj_sec_sym_ok_for_reloc (sec);
268 sym = symbol_new (s, absolute_section, (valueT) 0, (struct frag *) 0);
269 symbol_set_frag (sym, &zero_address_frag);
270 symbol_get_bfdsym (sym)->flags |= BSF_FILE;
272 if (symbol_rootP != sym)
274 symbol_remove (sym, &symbol_rootP, &symbol_lastP);
275 symbol_insert (sym, symbol_rootP, &symbol_rootP, &symbol_lastP);
277 verify_symbol_chain (symbol_rootP, symbol_lastP);
281 #ifdef NEED_ECOFF_DEBUG
287 elf_common (is_common)
293 offsetT temp, size, sign;
298 if (flag_mri && is_common)
304 name = input_line_pointer;
305 c = get_symbol_end ();
306 /* just after name is now '\0' */
307 p = input_line_pointer;
310 if (*input_line_pointer != ',')
312 as_bad (_("expected comma after symbol-name"));
313 ignore_rest_of_line ();
316 input_line_pointer++; /* skip ',' */
317 temp = get_absolute_expr (&exp);
318 sign = (offsetT) 1 << (stdoutput->arch_info->bits_per_address - 1);
319 size = temp & ((sign << 1) - 1);
320 if (temp != size || !exp.X_unsigned)
322 as_bad (_(".COMMon length (%ld) out of range, ignored."), (long) temp);
323 ignore_rest_of_line ();
327 symbolP = symbol_find_or_make (name);
329 if (S_IS_DEFINED (symbolP) && ! S_IS_COMMON (symbolP))
331 as_bad (_("symbol `%s' is already defined"), S_GET_NAME (symbolP));
332 ignore_rest_of_line ();
335 if (S_GET_VALUE (symbolP) != 0)
337 if (S_GET_VALUE (symbolP) != (valueT) size)
339 as_warn (_("length of .comm \"%s\" is already %ld; not changed to %ld"),
340 S_GET_NAME (symbolP), (long) S_GET_VALUE (symbolP),
344 know (symbolP->sy_frag == &zero_address_frag);
345 if (*input_line_pointer != ',')
350 input_line_pointer++;
353 if (! have_align || *input_line_pointer != '"')
359 temp = get_absolute_expr (&exp);
363 as_warn (_("common alignment negative; 0 assumed"));
366 if (symbol_get_obj (symbolP)->local)
375 old_subsec = now_subseg;
378 /* convert to a power of 2 alignment */
379 for (align = 0; (temp & 1) == 0; temp >>= 1, ++align);
382 as_bad (_("common alignment not a power of 2"));
383 ignore_rest_of_line ();
389 record_alignment (bss_section, align);
390 subseg_set (bss_section, 0);
392 frag_align (align, 0, 0);
393 if (S_GET_SEGMENT (symbolP) == bss_section)
394 symbol_get_frag (symbolP)->fr_symbol = 0;
395 symbol_set_frag (symbolP, frag_now);
396 pfrag = frag_var (rs_org, 1, 1, (relax_substateT) 0, symbolP,
397 (offsetT) size, (char *) 0);
399 S_SET_SIZE (symbolP, size);
400 S_SET_SEGMENT (symbolP, bss_section);
401 S_CLEAR_EXTERNAL (symbolP);
402 subseg_set (old_sec, old_subsec);
407 S_SET_VALUE (symbolP, (valueT) size);
408 S_SET_ALIGN (symbolP, temp);
409 S_SET_EXTERNAL (symbolP);
410 S_SET_SEGMENT (symbolP, bfd_com_section_ptr);
415 input_line_pointer++;
416 /* @@ Some use the dot, some don't. Can we get some consistency?? */
417 if (*input_line_pointer == '.')
418 input_line_pointer++;
419 /* @@ Some say data, some say bss. */
420 if (strncmp (input_line_pointer, "bss\"", 4)
421 && strncmp (input_line_pointer, "data\"", 5))
423 while (*--input_line_pointer != '"')
425 input_line_pointer--;
426 goto bad_common_segment;
428 while (*input_line_pointer++ != '"')
430 goto allocate_common;
433 symbol_get_bfdsym (symbolP)->flags |= BSF_OBJECT;
435 demand_empty_rest_of_line ();
440 p = input_line_pointer;
441 while (*p && *p != '\n')
445 as_bad (_("bad .common segment %s"), input_line_pointer + 1);
447 input_line_pointer = p;
448 ignore_rest_of_line ();
454 obj_elf_common (is_common)
457 elf_common (is_common);
461 obj_elf_tls_common (ignore)
462 int ignore ATTRIBUTE_UNUSED;
464 symbolS *symbolP = elf_common (0);
467 symbol_get_bfdsym (symbolP)->flags |= BSF_THREAD_LOCAL;
471 obj_elf_local (ignore)
472 int ignore ATTRIBUTE_UNUSED;
480 name = input_line_pointer;
481 c = get_symbol_end ();
482 symbolP = symbol_find_or_make (name);
483 *input_line_pointer = c;
485 S_CLEAR_EXTERNAL (symbolP);
486 symbol_get_obj (symbolP)->local = 1;
489 input_line_pointer++;
491 if (*input_line_pointer == '\n')
496 demand_empty_rest_of_line ();
500 obj_elf_weak (ignore)
501 int ignore ATTRIBUTE_UNUSED;
509 name = input_line_pointer;
510 c = get_symbol_end ();
511 symbolP = symbol_find_or_make (name);
512 *input_line_pointer = c;
514 S_SET_WEAK (symbolP);
515 symbol_get_obj (symbolP)->local = 1;
518 input_line_pointer++;
520 if (*input_line_pointer == '\n')
525 demand_empty_rest_of_line ();
529 obj_elf_visibility (visibility)
536 elf_symbol_type *elfsym;
540 name = input_line_pointer;
541 c = get_symbol_end ();
542 symbolP = symbol_find_or_make (name);
543 *input_line_pointer = c;
547 bfdsym = symbol_get_bfdsym (symbolP);
548 elfsym = elf_symbol_from (bfd_asymbol_bfd (bfdsym), bfdsym);
552 elfsym->internal_elf_sym.st_other &= ~3;
553 elfsym->internal_elf_sym.st_other |= visibility;
557 input_line_pointer ++;
561 if (*input_line_pointer == '\n')
567 demand_empty_rest_of_line ();
570 static segT previous_section;
571 static int previous_subsection;
575 struct section_stack *next;
577 int subseg, prev_subseg;
580 static struct section_stack *section_stack;
582 /* Handle the .section pseudo-op. This code supports two different
585 The first is found on Solaris, and looks like
586 .section ".sec1",#alloc,#execinstr,#write
587 Here the names after '#' are the SHF_* flags to turn on for the
588 section. I'm not sure how it determines the SHT_* type (BFD
589 doesn't really give us control over the type, anyhow).
591 The second format is found on UnixWare, and probably most SVR4
592 machines, and looks like
593 .section .sec1,"a",@progbits
594 The quoted string may contain any combination of a, w, x, and
595 represents the SHF_* flags to turn on for the section. The string
596 beginning with '@' can be progbits or nobits. There should be
597 other possibilities, but I don't know what they are. In any case,
598 BFD doesn't really let us set the section type. */
600 /* Certain named sections have particular defined types, listed on p.
602 struct special_section
609 static struct special_section const special_sections[] =
611 { ".bss", SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
612 { ".comment", SHT_PROGBITS, 0 },
613 { ".data", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
614 { ".data1", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
615 { ".debug", SHT_PROGBITS, 0 },
616 #if defined (TC_HPPA) && !defined (TE_LINUX) && TARGET_ARCH_SIZE == 64
617 { ".fini", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
618 { ".init", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
620 { ".fini", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
621 { ".init", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
623 { ".line", SHT_PROGBITS, 0 },
624 { ".note", SHT_NOTE, 0 },
625 { ".rodata", SHT_PROGBITS, SHF_ALLOC },
626 { ".rodata1", SHT_PROGBITS, SHF_ALLOC },
627 { ".tbss", SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
628 { ".tdata", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_TLS },
629 { ".text", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
630 { ".init_array",SHT_INIT_ARRAY, SHF_ALLOC + SHF_WRITE },
631 { ".fini_array",SHT_FINI_ARRAY, SHF_ALLOC + SHF_WRITE },
632 { ".preinit_array",SHT_PREINIT_ARRAY, SHF_ALLOC + SHF_WRITE },
634 #ifdef ELF_TC_SPECIAL_SECTIONS
635 ELF_TC_SPECIAL_SECTIONS
639 /* The following section names are special, but they can not
640 reasonably appear in assembler code. Some of the attributes are
641 processor dependent. */
642 { ".dynamic", SHT_DYNAMIC, SHF_ALLOC /* + SHF_WRITE */ },
643 { ".dynstr", SHT_STRTAB, SHF_ALLOC },
644 { ".dynsym", SHT_DYNSYM, SHF_ALLOC },
645 { ".got", SHT_PROGBITS, 0 },
646 { ".hash", SHT_HASH, SHF_ALLOC },
647 { ".interp", SHT_PROGBITS, /* SHF_ALLOC */ },
648 { ".plt", SHT_PROGBITS, 0 },
649 { ".shstrtab",SHT_STRTAB, 0 },
650 { ".strtab", SHT_STRTAB, /* SHF_ALLOC */ },
651 { ".symtab", SHT_SYMTAB, /* SHF_ALLOC */ },
658 obj_elf_change_section (name, type, attr, entsize, group_name, linkonce, push)
663 const char *group_name;
672 #ifdef md_flush_pending_output
673 md_flush_pending_output ();
676 /* Switch to the section, creating it if necessary. */
679 struct section_stack *elt;
680 elt = xmalloc (sizeof (struct section_stack));
681 elt->next = section_stack;
683 elt->prev_seg = previous_section;
684 elt->subseg = now_subseg;
685 elt->prev_subseg = previous_subsection;
688 previous_section = now_seg;
689 previous_subsection = now_subseg;
691 old_sec = bfd_get_section_by_name (stdoutput, name);
692 sec = subseg_new (name, 0);
694 /* See if this is one of the special sections. */
695 for (i = 0; special_sections[i].name != NULL; i++)
696 if (strcmp (name, special_sections[i].name) == 0)
698 if (type == SHT_NULL)
699 type = special_sections[i].type;
700 else if (type != special_sections[i].type)
703 /* FIXME: gcc, as of 2002-10-22, will emit
705 .section .init_array,"aw",@progbits
707 for __attribute__ ((section (".init_array"))).
708 "@progbits" is incorrect. */
709 && special_sections[i].type != SHT_INIT_ARRAY
710 && special_sections[i].type != SHT_FINI_ARRAY
711 && special_sections[i].type != SHT_PREINIT_ARRAY)
713 as_warn (_("setting incorrect section type for %s"), name);
717 as_warn (_("ignoring incorrect section type for %s"), name);
718 type = special_sections[i].type;
721 if ((attr &~ special_sections[i].attributes) != 0
724 /* As a GNU extension, we permit a .note section to be
725 allocatable. If the linker sees an allocateable .note
726 section, it will create a PT_NOTE segment in the output
728 if (strcmp (name, ".note") != 0
729 || attr != SHF_ALLOC)
730 as_warn (_("setting incorrect section attributes for %s"),
733 attr |= special_sections[i].attributes;
737 /* Convert ELF type and flags to BFD flags. */
739 | ((attr & SHF_WRITE) ? 0 : SEC_READONLY)
740 | ((attr & SHF_ALLOC) ? SEC_ALLOC : 0)
741 | (((attr & SHF_ALLOC) && type != SHT_NOBITS) ? SEC_LOAD : 0)
742 | ((attr & SHF_EXECINSTR) ? SEC_CODE : 0)
743 | ((attr & SHF_MERGE) ? SEC_MERGE : 0)
744 | ((attr & SHF_STRINGS) ? SEC_STRINGS : 0)
745 | ((attr & SHF_TLS) ? SEC_THREAD_LOCAL : 0));
746 #ifdef md_elf_section_flags
747 flags = md_elf_section_flags (flags, attr, type);
754 /* Prevent SEC_HAS_CONTENTS from being inadvertently set. */
755 if (type == SHT_NOBITS)
756 seg_info (sec)->bss = 1;
759 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
760 bfd_set_section_flags (stdoutput, sec, flags);
761 if (flags & SEC_MERGE)
762 sec->entsize = entsize;
763 elf_group_name (sec) = group_name;
765 /* Add a symbol for this section to the symbol table. */
766 secsym = symbol_find (name);
768 symbol_set_bfdsym (secsym, sec->symbol);
770 symbol_table_insert (section_symbol (sec));
774 /* If section attributes are specified the second time we see a
775 particular section, then check that they are the same as we
776 saw the first time. */
777 if (((old_sec->flags ^ flags)
778 & (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
779 | SEC_EXCLUDE | SEC_SORT_ENTRIES | SEC_MERGE | SEC_STRINGS
780 | SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD
781 | SEC_THREAD_LOCAL)))
782 as_warn (_("ignoring changed section attributes for %s"), name);
783 if ((flags & SEC_MERGE) && old_sec->entsize != (unsigned) entsize)
784 as_warn (_("ignoring changed section entity size for %s"), name);
785 if ((attr & SHF_GROUP) != 0
786 && strcmp (elf_group_name (old_sec), group_name) != 0)
787 as_warn (_("ignoring new section group for %s"), name);
790 #ifdef md_elf_section_change_hook
791 md_elf_section_change_hook ();
796 obj_elf_parse_section_letters (str, len)
813 attr |= SHF_EXECINSTR;
829 if (*(str - 1) == 'a')
832 if (len > 1 && str[1] == 's')
841 char *bad_msg = _("unrecognized .section attribute: want a,w,x,M,S,G,T");
842 #ifdef md_elf_section_letter
843 int md_attr = md_elf_section_letter (*str, &bad_msg);
849 as_warn ("%s", bad_msg);
862 obj_elf_section_word (str, len)
866 if (len == 5 && strncmp (str, "write", 5) == 0)
868 if (len == 5 && strncmp (str, "alloc", 5) == 0)
870 if (len == 9 && strncmp (str, "execinstr", 9) == 0)
871 return SHF_EXECINSTR;
872 if (len == 3 && strncmp (str, "tls", 3) == 0)
875 #ifdef md_elf_section_word
877 int md_attr = md_elf_section_word (str, len);
883 as_warn (_("unrecognized section attribute"));
888 obj_elf_section_type (str, len)
892 if (len == 8 && strncmp (str, "progbits", 8) == 0)
894 if (len == 6 && strncmp (str, "nobits", 6) == 0)
897 #ifdef md_elf_section_type
899 int md_type = md_elf_section_type (str, len);
905 as_warn (_("unrecognized section type"));
909 /* Get name of section. */
911 obj_elf_section_name ()
916 if (*input_line_pointer == '"')
920 name = demand_copy_C_string (&dummy);
923 ignore_rest_of_line ();
929 char *end = input_line_pointer;
931 while (0 == strchr ("\n\t,; ", *end))
933 if (end == input_line_pointer)
935 as_warn (_("missing name"));
936 ignore_rest_of_line ();
940 name = xmalloc (end - input_line_pointer + 1);
941 memcpy (name, input_line_pointer, end - input_line_pointer);
942 name[end - input_line_pointer] = '\0';
943 input_line_pointer = end;
950 obj_elf_section (push)
953 char *name, *group_name, *beg;
954 int type, attr, dummy;
963 #ifdef md_flush_pending_output
964 md_flush_pending_output ();
967 previous_section = now_seg;
968 previous_subsection = now_subseg;
970 s_mri_sect (&mri_type);
972 #ifdef md_elf_section_change_hook
973 md_elf_section_change_hook ();
978 #endif /* ! defined (TC_I370) */
980 name = obj_elf_section_name ();
989 if (*input_line_pointer == ',')
991 /* Skip the comma. */
992 ++input_line_pointer;
995 if (*input_line_pointer == '"')
997 beg = demand_copy_C_string (&dummy);
1000 ignore_rest_of_line ();
1003 attr |= obj_elf_parse_section_letters (beg, strlen (beg));
1006 if (*input_line_pointer == ',')
1009 char *save = input_line_pointer;
1011 ++input_line_pointer;
1013 c = *input_line_pointer;
1016 beg = demand_copy_C_string (&dummy);
1019 ignore_rest_of_line ();
1022 type = obj_elf_section_type (beg, strlen (beg));
1024 else if (c == '@' || c == '%')
1026 beg = ++input_line_pointer;
1027 c = get_symbol_end ();
1028 *input_line_pointer = c;
1029 type = obj_elf_section_type (beg, input_line_pointer - beg);
1032 input_line_pointer = save;
1036 if ((attr & SHF_MERGE) != 0 && *input_line_pointer == ',')
1038 ++input_line_pointer;
1040 entsize = get_absolute_expression ();
1044 as_warn (_("invalid merge entity size"));
1049 else if ((attr & SHF_MERGE) != 0)
1051 as_warn (_("entity size for SHF_MERGE not specified"));
1055 if ((attr & SHF_GROUP) != 0 && *input_line_pointer == ',')
1057 ++input_line_pointer;
1058 group_name = obj_elf_section_name ();
1059 if (group_name == NULL)
1061 else if (strncmp (input_line_pointer, ",comdat", 7) == 0)
1063 input_line_pointer += 7;
1066 else if (strncmp (name, ".gnu.linkonce", 13) == 0)
1069 else if ((attr & SHF_GROUP) != 0)
1071 as_warn (_("group name for SHF_GROUP not specified"));
1082 if (*input_line_pointer != '#')
1084 as_warn (_("character following name is not '#'"));
1085 ignore_rest_of_line ();
1088 beg = ++input_line_pointer;
1089 c = get_symbol_end ();
1090 *input_line_pointer = c;
1092 attr |= obj_elf_section_word (beg, input_line_pointer - beg);
1096 while (*input_line_pointer++ == ',');
1097 --input_line_pointer;
1101 demand_empty_rest_of_line ();
1103 obj_elf_change_section (name, type, attr, entsize, group_name, linkonce, push);
1106 /* Change to the .data section. */
1112 #ifdef md_flush_pending_output
1113 md_flush_pending_output ();
1116 previous_section = now_seg;
1117 previous_subsection = now_subseg;
1120 #ifdef md_elf_section_change_hook
1121 md_elf_section_change_hook ();
1125 /* Change to the .text section. */
1131 #ifdef md_flush_pending_output
1132 md_flush_pending_output ();
1135 previous_section = now_seg;
1136 previous_subsection = now_subseg;
1139 #ifdef md_elf_section_change_hook
1140 md_elf_section_change_hook ();
1145 obj_elf_subsection (ignore)
1146 int ignore ATTRIBUTE_UNUSED;
1150 #ifdef md_flush_pending_output
1151 md_flush_pending_output ();
1154 previous_section = now_seg;
1155 previous_subsection = now_subseg;
1157 temp = get_absolute_expression ();
1158 subseg_set (now_seg, (subsegT) temp);
1159 demand_empty_rest_of_line ();
1161 #ifdef md_elf_section_change_hook
1162 md_elf_section_change_hook ();
1166 /* This can be called from the processor backends if they change
1170 obj_elf_section_change_hook ()
1172 previous_section = now_seg;
1173 previous_subsection = now_subseg;
1177 obj_elf_previous (ignore)
1178 int ignore ATTRIBUTE_UNUSED;
1183 if (previous_section == 0)
1185 as_warn (_(".previous without corresponding .section; ignored"));
1189 #ifdef md_flush_pending_output
1190 md_flush_pending_output ();
1193 new_section = previous_section;
1194 new_subsection = previous_subsection;
1195 previous_section = now_seg;
1196 previous_subsection = now_subseg;
1197 subseg_set (new_section, new_subsection);
1199 #ifdef md_elf_section_change_hook
1200 md_elf_section_change_hook ();
1205 obj_elf_popsection (xxx)
1206 int xxx ATTRIBUTE_UNUSED;
1208 struct section_stack *top = section_stack;
1212 as_warn (_(".popsection without corresponding .pushsection; ignored"));
1216 #ifdef md_flush_pending_output
1217 md_flush_pending_output ();
1220 section_stack = top->next;
1221 previous_section = top->prev_seg;
1222 previous_subsection = top->prev_subseg;
1223 subseg_set (top->seg, top->subseg);
1226 #ifdef md_elf_section_change_hook
1227 md_elf_section_change_hook ();
1232 obj_elf_line (ignore)
1233 int ignore ATTRIBUTE_UNUSED;
1235 /* Assume delimiter is part of expression. BSD4.2 as fails with
1236 delightful bug, so we are not being incompatible here. */
1237 new_logical_line ((char *) NULL, (int) (get_absolute_expression ()));
1238 demand_empty_rest_of_line ();
1241 /* This handles the .symver pseudo-op, which is used to specify a
1242 symbol version. The syntax is ``.symver NAME,SYMVERNAME''.
1243 SYMVERNAME may contain ELF_VER_CHR ('@') characters. This
1244 pseudo-op causes the assembler to emit a symbol named SYMVERNAME
1245 with the same value as the symbol NAME. */
1248 obj_elf_symver (ignore)
1249 int ignore ATTRIBUTE_UNUSED;
1256 name = input_line_pointer;
1257 c = get_symbol_end ();
1259 sym = symbol_find_or_make (name);
1261 *input_line_pointer = c;
1264 if (*input_line_pointer != ',')
1266 as_bad (_("expected comma after name in .symver"));
1267 ignore_rest_of_line ();
1271 ++input_line_pointer;
1272 name = input_line_pointer;
1274 /* Temporarily include '@' in symbol names. */
1275 old_lexat = lex_type[(unsigned char) '@'];
1276 lex_type[(unsigned char) '@'] |= LEX_NAME;
1277 c = get_symbol_end ();
1278 lex_type[(unsigned char) '@'] = old_lexat;
1280 if (symbol_get_obj (sym)->versioned_name == NULL)
1282 symbol_get_obj (sym)->versioned_name = xstrdup (name);
1284 *input_line_pointer = c;
1286 if (strchr (symbol_get_obj (sym)->versioned_name,
1287 ELF_VER_CHR) == NULL)
1289 as_bad (_("missing version name in `%s' for symbol `%s'"),
1290 symbol_get_obj (sym)->versioned_name,
1292 ignore_rest_of_line ();
1298 if (strcmp (symbol_get_obj (sym)->versioned_name, name))
1300 as_bad (_("multiple versions [`%s'|`%s'] for symbol `%s'"),
1301 name, symbol_get_obj (sym)->versioned_name,
1303 ignore_rest_of_line ();
1307 *input_line_pointer = c;
1310 demand_empty_rest_of_line ();
1313 /* This handles the .vtable_inherit pseudo-op, which is used to indicate
1314 to the linker the hierarchy in which a particular table resides. The
1315 syntax is ".vtable_inherit CHILDNAME, PARENTNAME". */
1318 obj_elf_vtable_inherit (ignore)
1319 int ignore ATTRIBUTE_UNUSED;
1321 char *cname, *pname;
1322 symbolS *csym, *psym;
1325 if (*input_line_pointer == '#')
1326 ++input_line_pointer;
1328 cname = input_line_pointer;
1329 c = get_symbol_end ();
1330 csym = symbol_find (cname);
1332 /* GCFIXME: should check that we don't have two .vtable_inherits for
1333 the same child symbol. Also, we can currently only do this if the
1334 child symbol is already exists and is placed in a fragment. */
1336 if (csym == NULL || symbol_get_frag (csym) == NULL)
1338 as_bad ("expected `%s' to have already been set for .vtable_inherit",
1343 *input_line_pointer = c;
1346 if (*input_line_pointer != ',')
1348 as_bad ("expected comma after name in .vtable_inherit");
1349 ignore_rest_of_line ();
1353 ++input_line_pointer;
1356 if (*input_line_pointer == '#')
1357 ++input_line_pointer;
1359 if (input_line_pointer[0] == '0'
1360 && (input_line_pointer[1] == '\0'
1361 || ISSPACE (input_line_pointer[1])))
1363 psym = section_symbol (absolute_section);
1364 ++input_line_pointer;
1368 pname = input_line_pointer;
1369 c = get_symbol_end ();
1370 psym = symbol_find_or_make (pname);
1371 *input_line_pointer = c;
1374 demand_empty_rest_of_line ();
1379 assert (symbol_get_value_expression (csym)->X_op == O_constant);
1380 return fix_new (symbol_get_frag (csym),
1381 symbol_get_value_expression (csym)->X_add_number,
1382 0, psym, 0, 0, BFD_RELOC_VTABLE_INHERIT);
1385 /* This handles the .vtable_entry pseudo-op, which is used to indicate
1386 to the linker that a vtable slot was used. The syntax is
1387 ".vtable_entry tablename, offset". */
1390 obj_elf_vtable_entry (ignore)
1391 int ignore ATTRIBUTE_UNUSED;
1398 if (*input_line_pointer == '#')
1399 ++input_line_pointer;
1401 name = input_line_pointer;
1402 c = get_symbol_end ();
1403 sym = symbol_find_or_make (name);
1404 *input_line_pointer = c;
1407 if (*input_line_pointer != ',')
1409 as_bad ("expected comma after name in .vtable_entry");
1410 ignore_rest_of_line ();
1414 ++input_line_pointer;
1415 if (*input_line_pointer == '#')
1416 ++input_line_pointer;
1418 offset = get_absolute_expression ();
1420 demand_empty_rest_of_line ();
1422 return fix_new (frag_now, frag_now_fix (), 0, sym, offset, 0,
1423 BFD_RELOC_VTABLE_ENTRY);
1427 elf_obj_read_begin_hook ()
1429 #ifdef NEED_ECOFF_DEBUG
1430 if (ECOFF_DEBUGGING)
1431 ecoff_read_begin_hook ();
1436 elf_obj_symbol_new_hook (symbolP)
1439 struct elf_obj_sy *sy_obj;
1441 sy_obj = symbol_get_obj (symbolP);
1442 sy_obj->size = NULL;
1443 sy_obj->versioned_name = NULL;
1445 #ifdef NEED_ECOFF_DEBUG
1446 if (ECOFF_DEBUGGING)
1447 ecoff_symbol_new_hook (symbolP);
1451 /* When setting one symbol equal to another, by default we probably
1452 want them to have the same "size", whatever it means in the current
1456 elf_copy_symbol_attributes (dest, src)
1457 symbolS *dest, *src;
1459 struct elf_obj_sy *srcelf = symbol_get_obj (src);
1460 struct elf_obj_sy *destelf = symbol_get_obj (dest);
1463 if (destelf->size == NULL)
1465 (expressionS *) xmalloc (sizeof (expressionS));
1466 *destelf->size = *srcelf->size;
1470 if (destelf->size != NULL)
1471 free (destelf->size);
1472 destelf->size = NULL;
1474 S_SET_SIZE (dest, S_GET_SIZE (src));
1475 /* Don't copy visibility. */
1476 S_SET_OTHER (dest, (ELF_ST_VISIBILITY (S_GET_OTHER (dest))
1477 | (S_GET_OTHER (src) & ~ELF_ST_VISIBILITY (-1))));
1481 obj_elf_version (ignore)
1482 int ignore ATTRIBUTE_UNUSED;
1487 asection *seg = now_seg;
1488 subsegT subseg = now_subseg;
1489 Elf_Internal_Note i_note;
1490 Elf_External_Note e_note;
1491 asection *note_secp = (asection *) NULL;
1495 if (*input_line_pointer == '\"')
1497 ++input_line_pointer; /* -> 1st char of string. */
1498 name = input_line_pointer;
1500 while (is_a_char (c = next_char_of_string ()))
1502 c = *input_line_pointer;
1503 *input_line_pointer = '\0';
1504 *(input_line_pointer - 1) = '\0';
1505 *input_line_pointer = c;
1507 /* create the .note section */
1509 note_secp = subseg_new (".note", 0);
1510 bfd_set_section_flags (stdoutput,
1512 SEC_HAS_CONTENTS | SEC_READONLY);
1514 /* process the version string */
1516 len = strlen (name);
1518 i_note.namesz = ((len + 1) + 3) & ~3; /* round this to word boundary */
1519 i_note.descsz = 0; /* no description */
1520 i_note.type = NT_VERSION;
1521 p = frag_more (sizeof (e_note.namesz));
1522 md_number_to_chars (p, (valueT) i_note.namesz, sizeof (e_note.namesz));
1523 p = frag_more (sizeof (e_note.descsz));
1524 md_number_to_chars (p, (valueT) i_note.descsz, sizeof (e_note.descsz));
1525 p = frag_more (sizeof (e_note.type));
1526 md_number_to_chars (p, (valueT) i_note.type, sizeof (e_note.type));
1527 p = frag_more (len + 1);
1530 frag_align (2, 0, 0);
1532 subseg_set (seg, subseg);
1536 as_bad (_("expected quoted string"));
1538 demand_empty_rest_of_line ();
1542 obj_elf_size (ignore)
1543 int ignore ATTRIBUTE_UNUSED;
1545 char *name = input_line_pointer;
1546 char c = get_symbol_end ();
1551 p = input_line_pointer;
1554 if (*input_line_pointer != ',')
1557 as_bad (_("expected comma after name `%s' in .size directive"), name);
1559 ignore_rest_of_line ();
1562 input_line_pointer++;
1564 if (exp.X_op == O_absent)
1566 as_bad (_("missing expression in .size directive"));
1567 exp.X_op = O_constant;
1568 exp.X_add_number = 0;
1571 sym = symbol_find_or_make (name);
1573 if (exp.X_op == O_constant)
1575 S_SET_SIZE (sym, exp.X_add_number);
1576 if (symbol_get_obj (sym)->size)
1578 xfree (symbol_get_obj (sym)->size);
1579 symbol_get_obj (sym)->size = NULL;
1584 symbol_get_obj (sym)->size =
1585 (expressionS *) xmalloc (sizeof (expressionS));
1586 *symbol_get_obj (sym)->size = exp;
1588 demand_empty_rest_of_line ();
1591 /* Handle the ELF .type pseudo-op. This sets the type of a symbol.
1592 There are five syntaxes:
1594 The first (used on Solaris) is
1596 The second (used on UnixWare) is
1598 The third (reportedly to be used on Irix 6.0) is
1600 The fourth (used on NetBSD/Arm and Linux/ARM) is
1602 The fifth (used on SVR4/860) is
1603 .type SYM,"function"
1607 obj_elf_type (ignore)
1608 int ignore ATTRIBUTE_UNUSED;
1613 const char *typename;
1615 elf_symbol_type *elfsym;
1617 name = input_line_pointer;
1618 c = get_symbol_end ();
1619 sym = symbol_find_or_make (name);
1620 elfsym = (elf_symbol_type *) symbol_get_bfdsym (sym);
1621 *input_line_pointer = c;
1624 if (*input_line_pointer == ',')
1625 ++input_line_pointer;
1628 if ( *input_line_pointer == '#'
1629 || *input_line_pointer == '@'
1630 || *input_line_pointer == '"'
1631 || *input_line_pointer == '%')
1632 ++input_line_pointer;
1634 typename = input_line_pointer;
1635 c = get_symbol_end ();
1638 if (strcmp (typename, "function") == 0
1639 || strcmp (typename, "STT_FUNC") == 0)
1640 type = BSF_FUNCTION;
1641 else if (strcmp (typename, "object") == 0
1642 || strcmp (typename, "STT_OBJECT") == 0)
1644 else if (strcmp (typename, "tls_object") == 0
1645 || strcmp (typename, "STT_TLS") == 0)
1646 type = BSF_OBJECT | BSF_THREAD_LOCAL;
1647 #ifdef md_elf_symbol_type
1648 else if ((type = md_elf_symbol_type (typename, sym, elfsym)) != -1)
1652 as_bad (_("unrecognized symbol type \"%s\""), typename);
1654 *input_line_pointer = c;
1656 if (*input_line_pointer == '"')
1657 ++input_line_pointer;
1659 elfsym->symbol.flags |= type;
1661 demand_empty_rest_of_line ();
1665 obj_elf_ident (ignore)
1666 int ignore ATTRIBUTE_UNUSED;
1668 static segT comment_section;
1669 segT old_section = now_seg;
1670 int old_subsection = now_subseg;
1672 #ifdef md_flush_pending_output
1673 md_flush_pending_output ();
1676 if (!comment_section)
1679 comment_section = subseg_new (".comment", 0);
1680 bfd_set_section_flags (stdoutput, comment_section,
1681 SEC_READONLY | SEC_HAS_CONTENTS);
1686 subseg_set (comment_section, 0);
1688 subseg_set (old_section, old_subsection);
1691 #ifdef INIT_STAB_SECTION
1693 /* The first entry in a .stabs section is special. */
1696 obj_elf_init_stab_section (seg)
1702 unsigned int stroff;
1704 /* Force the section to align to a longword boundary. Without this,
1705 UnixWare ar crashes. */
1706 bfd_set_section_alignment (stdoutput, seg, 2);
1708 /* Make space for this first symbol. */
1712 as_where (&file, (unsigned int *) NULL);
1713 stabstr_name = (char *) xmalloc (strlen (segment_name (seg)) + 4);
1714 strcpy (stabstr_name, segment_name (seg));
1715 strcat (stabstr_name, "str");
1716 stroff = get_stab_string_offset (file, stabstr_name);
1718 md_number_to_chars (p, stroff, 4);
1719 seg_info (seg)->stabu.p = p;
1724 /* Fill in the counts in the first entry in a .stabs section. */
1727 adjust_stab_sections (abfd, sec, xxx)
1730 PTR xxx ATTRIBUTE_UNUSED;
1737 if (strncmp (".stab", sec->name, 5))
1739 if (!strcmp ("str", sec->name + strlen (sec->name) - 3))
1742 name = (char *) alloca (strlen (sec->name) + 4);
1743 strcpy (name, sec->name);
1744 strcat (name, "str");
1745 strsec = bfd_get_section_by_name (abfd, name);
1747 strsz = bfd_section_size (abfd, strsec);
1750 nsyms = bfd_section_size (abfd, sec) / 12 - 1;
1752 p = seg_info (sec)->stabu.p;
1755 bfd_h_put_16 (abfd, (bfd_vma) nsyms, (bfd_byte *) p + 6);
1756 bfd_h_put_32 (abfd, (bfd_vma) strsz, (bfd_byte *) p + 8);
1759 #ifdef NEED_ECOFF_DEBUG
1761 /* This function is called by the ECOFF code. It is supposed to
1762 record the external symbol information so that the backend can
1763 write it out correctly. The ELF backend doesn't actually handle
1764 this at the moment, so we do it ourselves. We save the information
1768 elf_ecoff_set_ext (sym, ext)
1770 struct ecoff_extr *ext;
1772 symbol_get_bfdsym (sym)->udata.p = (PTR) ext;
1775 /* This function is called by bfd_ecoff_debug_externals. It is
1776 supposed to *EXT to the external symbol information, and return
1777 whether the symbol should be used at all. */
1780 elf_get_extr (sym, ext)
1784 if (sym->udata.p == NULL)
1786 *ext = *(EXTR *) sym->udata.p;
1790 /* This function is called by bfd_ecoff_debug_externals. It has
1791 nothing to do for ELF. */
1795 elf_set_index (sym, indx)
1796 asymbol *sym ATTRIBUTE_UNUSED;
1797 bfd_size_type indx ATTRIBUTE_UNUSED;
1801 #endif /* NEED_ECOFF_DEBUG */
1804 elf_frob_symbol (symp, puntp)
1808 struct elf_obj_sy *sy_obj;
1810 #ifdef NEED_ECOFF_DEBUG
1811 if (ECOFF_DEBUGGING)
1812 ecoff_frob_symbol (symp);
1815 sy_obj = symbol_get_obj (symp);
1817 if (sy_obj->size != NULL)
1819 switch (sy_obj->size->X_op)
1823 (S_GET_VALUE (sy_obj->size->X_add_symbol)
1824 + sy_obj->size->X_add_number
1825 - S_GET_VALUE (sy_obj->size->X_op_symbol)));
1829 (S_GET_VALUE (sy_obj->size->X_add_symbol)
1830 + sy_obj->size->X_add_number));
1833 as_bad (_(".size expression too complicated to fix up"));
1836 free (sy_obj->size);
1837 sy_obj->size = NULL;
1840 if (sy_obj->versioned_name != NULL)
1844 p = strchr (sy_obj->versioned_name, ELF_VER_CHR);
1847 /* This symbol was given a new name with the .symver directive.
1849 If this is an external reference, just rename the symbol to
1850 include the version string. This will make the relocs be
1851 against the correct versioned symbol.
1853 If this is a definition, add an alias. FIXME: Using an alias
1854 will permit the debugging information to refer to the right
1855 symbol. However, it's not clear whether it is the best
1858 if (! S_IS_DEFINED (symp))
1860 /* Verify that the name isn't using the @@ syntax--this is
1861 reserved for definitions of the default version to link
1863 if (p[1] == ELF_VER_CHR)
1865 as_bad (_("invalid attempt to declare external version name as default in symbol `%s'"),
1866 sy_obj->versioned_name);
1869 S_SET_NAME (symp, sy_obj->versioned_name);
1873 if (p [1] == ELF_VER_CHR && p [2] == ELF_VER_CHR)
1877 /* The @@@ syntax is a special case. It renames the
1878 symbol name to versioned_name with one `@' removed. */
1879 l = strlen (&p[3]) + 1;
1880 memmove (&p [2], &p[3], l);
1881 S_SET_NAME (symp, sy_obj->versioned_name);
1887 /* FIXME: Creating a new symbol here is risky. We're
1888 in the final loop over the symbol table. We can
1889 get away with it only because the symbol goes to
1890 the end of the list, where the loop will still see
1891 it. It would probably be better to do this in
1892 obj_frob_file_before_adjust. */
1894 symp2 = symbol_find_or_make (sy_obj->versioned_name);
1896 /* Now we act as though we saw symp2 = sym. */
1898 S_SET_SEGMENT (symp2, S_GET_SEGMENT (symp));
1900 /* Subtracting out the frag address here is a hack
1901 because we are in the middle of the final loop. */
1904 - symbol_get_frag (symp)->fr_address));
1906 symbol_set_frag (symp2, symbol_get_frag (symp));
1908 /* This will copy over the size information. */
1909 copy_symbol_attributes (symp2, symp);
1911 S_SET_OTHER (symp2, S_GET_OTHER (symp));
1913 if (S_IS_WEAK (symp))
1916 if (S_IS_EXTERNAL (symp))
1917 S_SET_EXTERNAL (symp2);
1922 /* Double check weak symbols. */
1923 if (S_IS_WEAK (symp))
1925 if (S_IS_COMMON (symp))
1926 as_bad (_("symbol `%s' can not be both weak and common"),
1931 /* The Irix 5 and 6 assemblers set the type of any common symbol and
1932 any undefined non-function symbol to STT_OBJECT. We try to be
1933 compatible, since newer Irix 5 and 6 linkers care. However, we
1934 only set undefined symbols to be STT_OBJECT if we are on Irix,
1935 because that is the only time gcc will generate the necessary
1936 .global directives to mark functions. */
1938 if (S_IS_COMMON (symp))
1939 symbol_get_bfdsym (symp)->flags |= BSF_OBJECT;
1941 if (strstr (TARGET_OS, "irix") != NULL
1942 && ! S_IS_DEFINED (symp)
1943 && (symbol_get_bfdsym (symp)->flags & BSF_FUNCTION) == 0)
1944 symbol_get_bfdsym (symp)->flags |= BSF_OBJECT;
1948 /* If TC_PPC is defined, we used to force the type of a symbol to be
1949 BSF_OBJECT if it was otherwise unset. This was required by some
1951 that this is no longer needed, so it is now commented out. */
1952 if ((symbol_get_bfdsym (symp)->flags
1953 & (BSF_FUNCTION | BSF_FILE | BSF_SECTION_SYM)) == 0
1954 && S_IS_DEFINED (symp))
1955 symbol_get_bfdsym (symp)->flags |= BSF_OBJECT;
1961 asection **head; /* Section lists. */
1962 unsigned int *elt_count; /* Number of sections in each list. */
1963 unsigned int num_group; /* Number of lists. */
1966 /* Called via bfd_map_over_sections. If SEC is a member of a group,
1967 add it to a list of sections belonging to the group. INF is a
1968 pointer to a struct group_list, which is where we store the head of
1972 build_group_lists (abfd, sec, inf)
1973 bfd *abfd ATTRIBUTE_UNUSED;
1977 struct group_list *list = (struct group_list *) inf;
1978 const char *group_name = elf_group_name (sec);
1981 if (group_name == NULL)
1984 /* If this group already has a list, add the section to the head of
1986 for (i = 0; i < list->num_group; i++)
1988 if (strcmp (group_name, elf_group_name (list->head[i])) == 0)
1990 elf_next_in_group (sec) = list->head[i];
1991 list->head[i] = sec;
1992 list->elt_count[i] += 1;
1997 /* New group. Make the arrays bigger in chunks to minimize calls to
1999 i = list->num_group;
2002 unsigned int newsize = i + 128;
2003 list->head = xrealloc (list->head, newsize * sizeof (*list->head));
2004 list->elt_count = xrealloc (list->elt_count,
2005 newsize * sizeof (*list->elt_count));
2007 list->head[i] = sec;
2008 list->elt_count[i] = 1;
2009 list->num_group += 1;
2015 struct group_list list;
2018 bfd_map_over_sections (stdoutput, adjust_stab_sections, (PTR) 0);
2020 /* Go find section groups. */
2023 list.elt_count = NULL;
2024 bfd_map_over_sections (stdoutput, build_group_lists, (PTR) &list);
2026 /* Make the SHT_GROUP sections that describe each section group. We
2027 can't set up the section contents here yet, because elf section
2028 indices have yet to be calculated. elf.c:set_group_contents does
2029 the rest of the work. */
2030 for (i = 0; i < list.num_group; i++)
2032 const char *group_name = elf_group_name (list.head[i]);
2033 const char *sec_name;
2039 flags = SEC_READONLY | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_GROUP;
2040 for (s = list.head[i]; s != NULL; s = elf_next_in_group (s))
2041 if ((s->flags ^ flags) & SEC_LINK_ONCE)
2043 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
2044 if (s != list.head[i])
2046 as_warn (_("assuming all members of group `%s' are COMDAT"),
2052 sec_name = group_name;
2053 sy = symbol_find_exact (group_name);
2056 && (sy == symbol_lastP
2057 || (sy->sy_next != NULL
2058 && sy->sy_next->sy_previous == sy)))
2061 sec_name = ".group";
2063 s = subseg_force_new (sec_name, 0);
2065 || !bfd_set_section_flags (stdoutput, s, flags)
2066 || !bfd_set_section_alignment (stdoutput, s, 2))
2068 as_fatal (_("can't create group: %s"),
2069 bfd_errmsg (bfd_get_error ()));
2072 /* Pass a pointer to the first section in this group. */
2073 elf_next_in_group (s) = list.head[i];
2075 elf_group_id (s) = sy->bsym;
2077 s->_raw_size = 4 * (list.elt_count[i] + 1);
2078 s->contents = frag_more (s->_raw_size);
2079 frag_now->fr_fix = frag_now_fix_octets ();
2082 #ifdef elf_tc_final_processing
2083 elf_tc_final_processing ();
2087 /* It removes any unneeded versioned symbols from the symbol table. */
2090 elf_frob_file_before_adjust ()
2096 for (symp = symbol_rootP; symp; symp = symbol_next (symp))
2097 if (!S_IS_DEFINED (symp))
2099 if (symbol_get_obj (symp)->versioned_name)
2103 /* The @@@ syntax is a special case. If the symbol is
2104 not defined, 2 `@'s will be removed from the
2107 p = strchr (symbol_get_obj (symp)->versioned_name,
2110 if (p [1] == ELF_VER_CHR && p [2] == ELF_VER_CHR)
2112 size_t l = strlen (&p[3]) + 1;
2113 memmove (&p [1], &p[3], l);
2115 if (symbol_used_p (symp) == 0
2116 && symbol_used_in_reloc_p (symp) == 0)
2117 symbol_remove (symp, &symbol_rootP, &symbol_lastP);
2120 /* If there was .weak foo, but foo was neither defined nor
2121 used anywhere, remove it. */
2123 else if (S_IS_WEAK (symp)
2124 && symbol_used_p (symp) == 0
2125 && symbol_used_in_reloc_p (symp) == 0)
2126 symbol_remove (symp, &symbol_rootP, &symbol_lastP);
2131 /* It is required that we let write_relocs have the opportunity to
2132 optimize away fixups before output has begun, since it is possible
2133 to eliminate all fixups for a section and thus we never should
2134 have generated the relocation section. */
2137 elf_frob_file_after_relocs ()
2139 #ifdef NEED_ECOFF_DEBUG
2140 if (ECOFF_DEBUGGING)
2141 /* Generate the ECOFF debugging information. */
2143 const struct ecoff_debug_swap *debug_swap;
2144 struct ecoff_debug_info debug;
2149 = get_elf_backend_data (stdoutput)->elf_backend_ecoff_debug_swap;
2150 know (debug_swap != (const struct ecoff_debug_swap *) NULL);
2151 ecoff_build_debug (&debug.symbolic_header, &buf, debug_swap);
2153 /* Set up the pointers in debug. */
2154 #define SET(ptr, offset, type) \
2155 debug.ptr = (type) (buf + debug.symbolic_header.offset)
2157 SET (line, cbLineOffset, unsigned char *);
2158 SET (external_dnr, cbDnOffset, PTR);
2159 SET (external_pdr, cbPdOffset, PTR);
2160 SET (external_sym, cbSymOffset, PTR);
2161 SET (external_opt, cbOptOffset, PTR);
2162 SET (external_aux, cbAuxOffset, union aux_ext *);
2163 SET (ss, cbSsOffset, char *);
2164 SET (external_fdr, cbFdOffset, PTR);
2165 SET (external_rfd, cbRfdOffset, PTR);
2166 /* ssext and external_ext are set up just below. */
2170 /* Set up the external symbols. */
2171 debug.ssext = debug.ssext_end = NULL;
2172 debug.external_ext = debug.external_ext_end = NULL;
2173 if (! bfd_ecoff_debug_externals (stdoutput, &debug, debug_swap, TRUE,
2174 elf_get_extr, elf_set_index))
2175 as_fatal (_("failed to set up debugging information: %s"),
2176 bfd_errmsg (bfd_get_error ()));
2178 sec = bfd_get_section_by_name (stdoutput, ".mdebug");
2179 assert (sec != NULL);
2181 know (!stdoutput->output_has_begun);
2183 /* We set the size of the section, call bfd_set_section_contents
2184 to force the ELF backend to allocate a file position, and then
2185 write out the data. FIXME: Is this really the best way to do
2187 sec->_raw_size = bfd_ecoff_debug_size (stdoutput, &debug, debug_swap);
2189 /* Pass BUF to bfd_set_section_contents because this will
2190 eventually become a call to fwrite, and ISO C prohibits
2191 passing a NULL pointer to a stdio function even if the
2192 pointer will not be used. */
2193 if (! bfd_set_section_contents (stdoutput, sec, (PTR) buf,
2194 (file_ptr) 0, (bfd_size_type) 0))
2195 as_fatal (_("can't start writing .mdebug section: %s"),
2196 bfd_errmsg (bfd_get_error ()));
2198 know (stdoutput->output_has_begun);
2199 know (sec->filepos != 0);
2201 if (! bfd_ecoff_write_debug (stdoutput, &debug, debug_swap,
2203 as_fatal (_("could not write .mdebug section: %s"),
2204 bfd_errmsg (bfd_get_error ()));
2206 #endif /* NEED_ECOFF_DEBUG */
2211 /* Heavily plagarized from obj_elf_version. The idea is to emit the
2212 SCO specific identifier in the .notes section to satisfy the SCO
2215 This looks more complicated than it really is. As opposed to the
2216 "obvious" solution, this should handle the cross dev cases
2217 correctly. (i.e, hosting on a 64 bit big endian processor, but
2218 generating SCO Elf code) Efficiency isn't a concern, as there
2219 should be exactly one of these sections per object module.
2221 SCO OpenServer 5 identifies it's ELF modules with a standard ELF
2224 int_32 namesz = 4 ; Name size
2225 int_32 descsz = 12 ; Descriptive information
2227 char name[4] = "SCO" ; Originator name ALWAYS SCO + NULL
2228 int_32 version = (major ver # << 16) | version of tools ;
2229 int_32 source = (tool_id << 16 ) | 1 ;
2230 int_32 info = 0 ; These are set by the SCO tools, but we
2231 don't know enough about the source
2232 environment to set them. SCO ld currently
2233 ignores them, and recommends we set them
2236 #define SCO_MAJOR_VERSION 0x1
2237 #define SCO_MINOR_VERSION 0x1
2247 asection *seg = now_seg;
2248 subsegT subseg = now_subseg;
2249 Elf_Internal_Note i_note;
2250 Elf_External_Note e_note;
2251 asection *note_secp = (asection *) NULL;
2254 /* create the .note section */
2256 note_secp = subseg_new (".note", 0);
2257 bfd_set_section_flags (stdoutput,
2259 SEC_HAS_CONTENTS | SEC_READONLY);
2261 /* process the version string */
2264 i_note.descsz = 12; /* 12 descriptive bytes */
2265 i_note.type = NT_VERSION; /* Contains a version string */
2267 p = frag_more (sizeof (i_note.namesz));
2268 md_number_to_chars (p, (valueT) i_note.namesz, 4);
2270 p = frag_more (sizeof (i_note.descsz));
2271 md_number_to_chars (p, (valueT) i_note.descsz, 4);
2273 p = frag_more (sizeof (i_note.type));
2274 md_number_to_chars (p, (valueT) i_note.type, 4);
2279 /* Note: this is the version number of the ELF we're representing */
2281 md_number_to_chars (p, (SCO_MAJOR_VERSION << 16) | (SCO_MINOR_VERSION), 4);
2283 /* Here, we pick a magic number for ourselves (yes, I "registered"
2284 it with SCO. The bottom bit shows that we are compat with the
2287 md_number_to_chars (p, 0x4c520000 | 0x0001, 4);
2289 /* If we knew (or cared) what the source language options were, we'd
2290 fill them in here. SCO has given us permission to ignore these
2291 and just set them to zero. */
2293 md_number_to_chars (p, 0x0000, 4);
2295 frag_align (2, 0, 0);
2297 /* We probably can't restore the current segment, for there likely
2300 subseg_set (seg, subseg);
2304 #endif /* SCO_ELF */
2307 elf_separate_stab_sections ()
2309 #ifdef NEED_ECOFF_DEBUG
2310 return (!ECOFF_DEBUGGING);
2317 elf_init_stab_section (seg)
2320 #ifdef NEED_ECOFF_DEBUG
2321 if (!ECOFF_DEBUGGING)
2323 obj_elf_init_stab_section (seg);
2326 const struct format_ops elf_format_ops =
2328 bfd_target_elf_flavour,
2329 0, /* dfl_leading_underscore */
2330 1, /* emit_section_symbols */
2335 elf_frob_file_before_adjust,
2336 0, /* obj_frob_file_before_fix */
2337 elf_frob_file_after_relocs,
2338 elf_s_get_size, elf_s_set_size,
2339 elf_s_get_align, elf_s_set_align,
2346 elf_copy_symbol_attributes,
2347 #ifdef NEED_ECOFF_DEBUG
2348 ecoff_generate_asm_lineno,
2351 0, /* generate_asm_lineno */
2352 0, /* process_stab */
2354 elf_separate_stab_sections,
2355 elf_init_stab_section,
2356 elf_sec_sym_ok_for_reloc,
2358 #ifdef NEED_ECOFF_DEBUG
2361 0, /* ecoff_set_ext */
2363 elf_obj_read_begin_hook,
2364 elf_obj_symbol_new_hook