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"
28 #include "dwarf2dbg.h"
30 #ifndef ECOFF_DEBUGGING
31 #define ECOFF_DEBUGGING 0
33 #define NEED_ECOFF_DEBUG
36 #ifdef NEED_ECOFF_DEBUG
41 #include "elf/alpha.h"
56 static void obj_elf_line (int);
57 static void obj_elf_size (int);
58 static void obj_elf_type (int);
59 static void obj_elf_ident (int);
60 static void obj_elf_weak (int);
61 static void obj_elf_local (int);
62 static void obj_elf_visibility (int);
63 static void obj_elf_symver (int);
64 static void obj_elf_subsection (int);
65 static void obj_elf_popsection (int);
66 static void obj_elf_tls_common (int);
67 static void obj_elf_lcomm (int);
69 static const pseudo_typeS elf_pseudo_table[] =
71 {"comm", obj_elf_common, 0},
72 {"common", obj_elf_common, 1},
73 {"ident", obj_elf_ident, 0},
74 {"lcomm", obj_elf_lcomm, 0},
75 {"local", obj_elf_local, 0},
76 {"previous", obj_elf_previous, 0},
77 {"section", obj_elf_section, 0},
78 {"section.s", obj_elf_section, 0},
79 {"sect", obj_elf_section, 0},
80 {"sect.s", obj_elf_section, 0},
81 {"pushsection", obj_elf_section, 1},
82 {"popsection", obj_elf_popsection, 0},
83 {"size", obj_elf_size, 0},
84 {"type", obj_elf_type, 0},
85 {"version", obj_elf_version, 0},
86 {"weak", obj_elf_weak, 0},
88 /* These define symbol visibility. */
89 {"internal", obj_elf_visibility, STV_INTERNAL},
90 {"hidden", obj_elf_visibility, STV_HIDDEN},
91 {"protected", obj_elf_visibility, STV_PROTECTED},
93 /* These are used for stabs-in-elf configurations. */
94 {"line", obj_elf_line, 0},
96 /* This is a GNU extension to handle symbol versions. */
97 {"symver", obj_elf_symver, 0},
99 /* A GNU extension to change subsection only. */
100 {"subsection", obj_elf_subsection, 0},
102 /* These are GNU extensions to aid in garbage collecting C++ vtables. */
103 {"vtable_inherit", (void (*) (int)) &obj_elf_vtable_inherit, 0},
104 {"vtable_entry", (void (*) (int)) &obj_elf_vtable_entry, 0},
106 /* These are used for dwarf. */
110 /* These are used for dwarf2. */
111 { "file", (void (*) (int)) dwarf2_directive_file, 0 },
112 { "loc", dwarf2_directive_loc, 0 },
114 /* We need to trap the section changing calls to handle .previous. */
115 {"data", obj_elf_data, 0},
116 {"text", obj_elf_text, 0},
118 {"tls_common", obj_elf_tls_common, 0},
124 static const pseudo_typeS ecoff_debug_pseudo_table[] =
126 #ifdef NEED_ECOFF_DEBUG
127 /* COFF style debugging information for ECOFF. .ln is not used; .loc
129 { "def", ecoff_directive_def, 0 },
130 { "dim", ecoff_directive_dim, 0 },
131 { "endef", ecoff_directive_endef, 0 },
132 { "file", ecoff_directive_file, 0 },
133 { "scl", ecoff_directive_scl, 0 },
134 { "tag", ecoff_directive_tag, 0 },
135 { "val", ecoff_directive_val, 0 },
137 /* COFF debugging requires pseudo-ops .size and .type, but ELF
138 already has meanings for those. We use .esize and .etype
139 instead. These are only generated by gcc anyhow. */
140 { "esize", ecoff_directive_size, 0 },
141 { "etype", ecoff_directive_type, 0 },
143 /* ECOFF specific debugging information. */
144 { "begin", ecoff_directive_begin, 0 },
145 { "bend", ecoff_directive_bend, 0 },
146 { "end", ecoff_directive_end, 0 },
147 { "ent", ecoff_directive_ent, 0 },
148 { "fmask", ecoff_directive_fmask, 0 },
149 { "frame", ecoff_directive_frame, 0 },
150 { "loc", ecoff_directive_loc, 0 },
151 { "mask", ecoff_directive_mask, 0 },
153 /* Other ECOFF directives. */
154 { "extern", ecoff_directive_extern, 0 },
156 /* These are used on Irix. I don't know how to implement them. */
157 { "alias", s_ignore, 0 },
158 { "bgnb", s_ignore, 0 },
159 { "endb", s_ignore, 0 },
160 { "lab", s_ignore, 0 },
161 { "noalias", s_ignore, 0 },
162 { "verstamp", s_ignore, 0 },
163 { "vreg", s_ignore, 0 },
166 {NULL, NULL, 0} /* end sentinel */
170 #include "aout/aout64.h"
172 /* This is called when the assembler starts. */
179 /* Add symbols for the known sections to the symbol table. */
180 s = bfd_get_section_by_name (stdoutput, TEXT_SECTION_NAME);
181 symbol_table_insert (section_symbol (s));
182 s = bfd_get_section_by_name (stdoutput, DATA_SECTION_NAME);
183 symbol_table_insert (section_symbol (s));
184 s = bfd_get_section_by_name (stdoutput, BSS_SECTION_NAME);
185 symbol_table_insert (section_symbol (s));
189 elf_pop_insert (void)
191 pop_insert (elf_pseudo_table);
193 pop_insert (ecoff_debug_pseudo_table);
197 elf_s_get_size (symbolS *sym)
199 return S_GET_SIZE (sym);
203 elf_s_set_size (symbolS *sym, bfd_vma sz)
205 S_SET_SIZE (sym, sz);
209 elf_s_get_align (symbolS *sym)
211 return S_GET_ALIGN (sym);
215 elf_s_set_align (symbolS *sym, bfd_vma align)
217 S_SET_ALIGN (sym, align);
221 elf_s_get_other (symbolS *sym)
223 return elf_symbol (symbol_get_bfdsym (sym))->internal_elf_sym.st_other;
227 elf_s_set_other (symbolS *sym, int other)
229 S_SET_OTHER (sym, other);
233 elf_sec_sym_ok_for_reloc (asection *sec)
235 return obj_sec_sym_ok_for_reloc (sec);
239 elf_file_symbol (const char *s)
243 sym = symbol_new (s, absolute_section, 0, NULL);
244 symbol_set_frag (sym, &zero_address_frag);
245 symbol_get_bfdsym (sym)->flags |= BSF_FILE;
247 if (symbol_rootP != sym)
249 symbol_remove (sym, &symbol_rootP, &symbol_lastP);
250 symbol_insert (sym, symbol_rootP, &symbol_rootP, &symbol_lastP);
252 verify_symbol_chain (symbol_rootP, symbol_lastP);
256 #ifdef NEED_ECOFF_DEBUG
261 /* Called from read.c:s_comm after we've parsed .comm symbol, size.
262 Parse a possible alignment value. */
265 elf_common_parse (int ignore ATTRIBUTE_UNUSED, symbolS *symbolP, addressT size)
268 int is_local = symbol_get_obj (symbolP)->local;
270 if (*input_line_pointer == ',')
272 char *save = input_line_pointer;
274 input_line_pointer++;
277 if (*input_line_pointer == '"')
279 /* For sparc. Accept .common symbol, length, "bss" */
280 input_line_pointer++;
281 /* Some use the dot, some don't. */
282 if (*input_line_pointer == '.')
283 input_line_pointer++;
284 /* Some say data, some say bss. */
285 if (strncmp (input_line_pointer, "bss\"", 4) == 0)
286 input_line_pointer += 4;
287 else if (strncmp (input_line_pointer, "data\"", 5) == 0)
288 input_line_pointer += 5;
291 char *p = input_line_pointer;
296 while (!is_end_of_line[(unsigned char) *input_line_pointer])
297 if (*input_line_pointer++ == '"')
299 c = *input_line_pointer;
300 *input_line_pointer = '\0';
301 as_bad (_("bad .common segment %s"), p);
302 *input_line_pointer = c;
303 ignore_rest_of_line ();
306 /* ??? Don't ask me why these are always global. */
311 input_line_pointer = save;
312 align = parse_align (is_local);
313 if (align == (addressT) -1)
320 bss_alloc (symbolP, size, align);
321 S_CLEAR_EXTERNAL (symbolP);
325 S_SET_VALUE (symbolP, size);
326 S_SET_ALIGN (symbolP, align);
327 S_SET_EXTERNAL (symbolP);
328 S_SET_SEGMENT (symbolP, bfd_com_section_ptr);
331 symbol_get_bfdsym (symbolP)->flags |= BSF_OBJECT;
337 obj_elf_common (int is_common)
339 if (flag_mri && is_common)
342 s_comm_internal (0, elf_common_parse);
346 obj_elf_tls_common (int ignore ATTRIBUTE_UNUSED)
348 symbolS *symbolP = s_comm_internal (0, elf_common_parse);
351 symbol_get_bfdsym (symbolP)->flags |= BSF_THREAD_LOCAL;
355 obj_elf_lcomm (int ignore ATTRIBUTE_UNUSED)
357 symbolS *symbolP = s_comm_internal (0, s_lcomm_internal);
360 symbol_get_bfdsym (symbolP)->flags |= BSF_OBJECT;
364 obj_elf_local (int ignore ATTRIBUTE_UNUSED)
372 name = input_line_pointer;
373 c = get_symbol_end ();
374 symbolP = symbol_find_or_make (name);
375 *input_line_pointer = c;
377 S_CLEAR_EXTERNAL (symbolP);
378 symbol_get_obj (symbolP)->local = 1;
381 input_line_pointer++;
383 if (*input_line_pointer == '\n')
388 demand_empty_rest_of_line ();
392 obj_elf_weak (int ignore ATTRIBUTE_UNUSED)
400 name = input_line_pointer;
401 c = get_symbol_end ();
402 symbolP = symbol_find_or_make (name);
403 *input_line_pointer = c;
405 S_SET_WEAK (symbolP);
406 symbol_get_obj (symbolP)->local = 1;
409 input_line_pointer++;
411 if (*input_line_pointer == '\n')
416 demand_empty_rest_of_line ();
420 obj_elf_visibility (int visibility)
426 elf_symbol_type *elfsym;
430 name = input_line_pointer;
431 c = get_symbol_end ();
432 symbolP = symbol_find_or_make (name);
433 *input_line_pointer = c;
437 bfdsym = symbol_get_bfdsym (symbolP);
438 elfsym = elf_symbol_from (bfd_asymbol_bfd (bfdsym), bfdsym);
442 elfsym->internal_elf_sym.st_other &= ~3;
443 elfsym->internal_elf_sym.st_other |= visibility;
447 input_line_pointer ++;
451 if (*input_line_pointer == '\n')
457 demand_empty_rest_of_line ();
460 static segT previous_section;
461 static int previous_subsection;
465 struct section_stack *next;
467 int subseg, prev_subseg;
470 static struct section_stack *section_stack;
472 /* Handle the .section pseudo-op. This code supports two different
475 The first is found on Solaris, and looks like
476 .section ".sec1",#alloc,#execinstr,#write
477 Here the names after '#' are the SHF_* flags to turn on for the
478 section. I'm not sure how it determines the SHT_* type (BFD
479 doesn't really give us control over the type, anyhow).
481 The second format is found on UnixWare, and probably most SVR4
482 machines, and looks like
483 .section .sec1,"a",@progbits
484 The quoted string may contain any combination of a, w, x, and
485 represents the SHF_* flags to turn on for the section. The string
486 beginning with '@' can be progbits or nobits. There should be
487 other possibilities, but I don't know what they are. In any case,
488 BFD doesn't really let us set the section type. */
491 obj_elf_change_section (const char *name,
495 const char *group_name,
502 const struct bfd_elf_special_section *ssect;
504 #ifdef md_flush_pending_output
505 md_flush_pending_output ();
508 /* Switch to the section, creating it if necessary. */
511 struct section_stack *elt;
512 elt = xmalloc (sizeof (struct section_stack));
513 elt->next = section_stack;
515 elt->prev_seg = previous_section;
516 elt->subseg = now_subseg;
517 elt->prev_subseg = previous_subsection;
520 previous_section = now_seg;
521 previous_subsection = now_subseg;
523 old_sec = bfd_get_section_by_name (stdoutput, name);
524 sec = subseg_new (name, 0);
525 ssect = _bfd_elf_get_sec_type_attr (stdoutput, name);
529 bfd_boolean override = FALSE;
531 if (type == SHT_NULL)
533 else if (type != ssect->type)
536 /* FIXME: gcc, as of 2002-10-22, will emit
538 .section .init_array,"aw",@progbits
540 for __attribute__ ((section (".init_array"))).
541 "@progbits" is incorrect. */
542 && ssect->type != SHT_INIT_ARRAY
543 && ssect->type != SHT_FINI_ARRAY
544 && ssect->type != SHT_PREINIT_ARRAY)
546 /* We allow to specify any type for a .note section. */
547 if (ssect->type != SHT_NOTE)
548 as_warn (_("setting incorrect section type for %s"),
553 as_warn (_("ignoring incorrect section type for %s"),
559 if (old_sec == NULL && (attr & ~ssect->attr) != 0)
561 /* As a GNU extension, we permit a .note section to be
562 allocatable. If the linker sees an allocatable .note
563 section, it will create a PT_NOTE segment in the output
564 file. We also allow "x" for .note.GNU-stack. */
565 if (ssect->type == SHT_NOTE
566 && (attr == SHF_ALLOC || attr == SHF_EXECINSTR))
568 /* Allow different SHF_MERGE and SHF_STRINGS if we have
569 something like .rodata.str. */
570 else if (ssect->suffix_length == -2
571 && name[ssect->prefix_length] == '.'
575 & ~SHF_STRINGS) == 0)
577 /* .interp, .strtab and .symtab can have SHF_ALLOC. */
578 else if (attr == SHF_ALLOC
579 && (strcmp (name, ".interp") == 0
580 || strcmp (name, ".strtab") == 0
581 || strcmp (name, ".symtab") == 0))
585 as_warn (_("setting incorrect section attributes for %s"),
590 if (!override && old_sec == NULL)
594 if (type != SHT_NULL)
595 elf_section_type (sec) = type;
597 elf_section_flags (sec) = attr;
599 /* Convert ELF type and flags to BFD flags. */
601 | ((attr & SHF_WRITE) ? 0 : SEC_READONLY)
602 | ((attr & SHF_ALLOC) ? SEC_ALLOC : 0)
603 | (((attr & SHF_ALLOC) && type != SHT_NOBITS) ? SEC_LOAD : 0)
604 | ((attr & SHF_EXECINSTR) ? SEC_CODE : 0)
605 | ((attr & SHF_MERGE) ? SEC_MERGE : 0)
606 | ((attr & SHF_STRINGS) ? SEC_STRINGS : 0)
607 | ((attr & SHF_TLS) ? SEC_THREAD_LOCAL : 0));
608 #ifdef md_elf_section_flags
609 flags = md_elf_section_flags (flags, attr, type);
616 /* Prevent SEC_HAS_CONTENTS from being inadvertently set. */
617 if (type == SHT_NOBITS)
618 seg_info (sec)->bss = 1;
621 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
622 bfd_set_section_flags (stdoutput, sec, flags);
623 if (flags & SEC_MERGE)
624 sec->entsize = entsize;
625 elf_group_name (sec) = group_name;
627 /* Add a symbol for this section to the symbol table. */
628 secsym = symbol_find (name);
630 symbol_set_bfdsym (secsym, sec->symbol);
632 symbol_table_insert (section_symbol (sec));
636 /* If section attributes are specified the second time we see a
637 particular section, then check that they are the same as we
638 saw the first time. */
639 if (((old_sec->flags ^ flags)
640 & (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
641 | SEC_EXCLUDE | SEC_SORT_ENTRIES | SEC_MERGE | SEC_STRINGS
642 | SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD
643 | SEC_THREAD_LOCAL)))
644 as_warn (_("ignoring changed section attributes for %s"), name);
645 if ((flags & SEC_MERGE) && old_sec->entsize != (unsigned) entsize)
646 as_warn (_("ignoring changed section entity size for %s"), name);
647 if ((attr & SHF_GROUP) != 0
648 && (elf_group_name (old_sec) == NULL
649 || strcmp (elf_group_name (old_sec), group_name) != 0))
650 as_warn (_("ignoring new section group for %s"), name);
653 #ifdef md_elf_section_change_hook
654 md_elf_section_change_hook ();
659 obj_elf_parse_section_letters (char *str, size_t len)
674 attr |= SHF_EXECINSTR;
690 if (*(str - 1) == 'a')
693 if (len > 1 && str[1] == 's')
702 char *bad_msg = _("unrecognized .section attribute: want a,w,x,M,S,G,T");
703 #ifdef md_elf_section_letter
704 int md_attr = md_elf_section_letter (*str, &bad_msg);
709 as_fatal ("%s", bad_msg);
720 obj_elf_section_word (char *str, size_t len)
722 if (len == 5 && strncmp (str, "write", 5) == 0)
724 if (len == 5 && strncmp (str, "alloc", 5) == 0)
726 if (len == 9 && strncmp (str, "execinstr", 9) == 0)
727 return SHF_EXECINSTR;
728 if (len == 3 && strncmp (str, "tls", 3) == 0)
731 #ifdef md_elf_section_word
733 int md_attr = md_elf_section_word (str, len);
739 as_warn (_("unrecognized section attribute"));
744 obj_elf_section_type (char *str, size_t len)
746 if (len == 8 && strncmp (str, "progbits", 8) == 0)
748 if (len == 6 && strncmp (str, "nobits", 6) == 0)
750 if (len == 4 && strncmp (str, "note", 4) == 0)
753 #ifdef md_elf_section_type
755 int md_type = md_elf_section_type (str, len);
761 as_warn (_("unrecognized section type"));
765 /* Get name of section. */
767 obj_elf_section_name (void)
772 if (*input_line_pointer == '"')
776 name = demand_copy_C_string (&dummy);
779 ignore_rest_of_line ();
785 char *end = input_line_pointer;
787 while (0 == strchr ("\n\t,; ", *end))
789 if (end == input_line_pointer)
791 as_bad (_("missing name"));
792 ignore_rest_of_line ();
796 name = xmalloc (end - input_line_pointer + 1);
797 memcpy (name, input_line_pointer, end - input_line_pointer);
798 name[end - input_line_pointer] = '\0';
799 #ifdef tc_canonicalize_section_name
800 name = tc_canonicalize_section_name (name);
802 input_line_pointer = end;
809 obj_elf_section (int push)
811 char *name, *group_name, *beg;
812 int type, attr, dummy;
821 #ifdef md_flush_pending_output
822 md_flush_pending_output ();
825 previous_section = now_seg;
826 previous_subsection = now_subseg;
828 s_mri_sect (&mri_type);
830 #ifdef md_elf_section_change_hook
831 md_elf_section_change_hook ();
836 #endif /* ! defined (TC_I370) */
838 name = obj_elf_section_name ();
847 if (*input_line_pointer == ',')
849 /* Skip the comma. */
850 ++input_line_pointer;
853 if (*input_line_pointer == '"')
855 beg = demand_copy_C_string (&dummy);
858 ignore_rest_of_line ();
861 attr |= obj_elf_parse_section_letters (beg, strlen (beg));
864 if (*input_line_pointer == ',')
867 char *save = input_line_pointer;
869 ++input_line_pointer;
871 c = *input_line_pointer;
874 beg = demand_copy_C_string (&dummy);
877 ignore_rest_of_line ();
880 type = obj_elf_section_type (beg, strlen (beg));
882 else if (c == '@' || c == '%')
884 beg = ++input_line_pointer;
885 c = get_symbol_end ();
886 *input_line_pointer = c;
887 type = obj_elf_section_type (beg, input_line_pointer - beg);
890 input_line_pointer = save;
894 if ((attr & SHF_MERGE) != 0 && *input_line_pointer == ',')
896 ++input_line_pointer;
898 entsize = get_absolute_expression ();
902 as_warn (_("invalid merge entity size"));
907 else if ((attr & SHF_MERGE) != 0)
909 as_warn (_("entity size for SHF_MERGE not specified"));
913 if ((attr & SHF_GROUP) != 0 && *input_line_pointer == ',')
915 ++input_line_pointer;
916 group_name = obj_elf_section_name ();
917 if (group_name == NULL)
919 else if (strncmp (input_line_pointer, ",comdat", 7) == 0)
921 input_line_pointer += 7;
924 else if (strncmp (name, ".gnu.linkonce", 13) == 0)
927 else if ((attr & SHF_GROUP) != 0)
929 as_warn (_("group name for SHF_GROUP not specified"));
940 if (*input_line_pointer != '#')
942 as_bad (_("character following name is not '#'"));
943 ignore_rest_of_line ();
946 beg = ++input_line_pointer;
947 c = get_symbol_end ();
948 *input_line_pointer = c;
950 attr |= obj_elf_section_word (beg, input_line_pointer - beg);
954 while (*input_line_pointer++ == ',');
955 --input_line_pointer;
959 demand_empty_rest_of_line ();
961 obj_elf_change_section (name, type, attr, entsize, group_name, linkonce, push);
964 /* Change to the .data section. */
969 #ifdef md_flush_pending_output
970 md_flush_pending_output ();
973 previous_section = now_seg;
974 previous_subsection = now_subseg;
977 #ifdef md_elf_section_change_hook
978 md_elf_section_change_hook ();
982 /* Change to the .text section. */
987 #ifdef md_flush_pending_output
988 md_flush_pending_output ();
991 previous_section = now_seg;
992 previous_subsection = now_subseg;
995 #ifdef md_elf_section_change_hook
996 md_elf_section_change_hook ();
1001 obj_elf_subsection (int ignore ATTRIBUTE_UNUSED)
1005 #ifdef md_flush_pending_output
1006 md_flush_pending_output ();
1009 previous_section = now_seg;
1010 previous_subsection = now_subseg;
1012 temp = get_absolute_expression ();
1013 subseg_set (now_seg, (subsegT) temp);
1014 demand_empty_rest_of_line ();
1016 #ifdef md_elf_section_change_hook
1017 md_elf_section_change_hook ();
1021 /* This can be called from the processor backends if they change
1025 obj_elf_section_change_hook (void)
1027 previous_section = now_seg;
1028 previous_subsection = now_subseg;
1032 obj_elf_previous (int ignore ATTRIBUTE_UNUSED)
1037 if (previous_section == 0)
1039 as_warn (_(".previous without corresponding .section; ignored"));
1043 #ifdef md_flush_pending_output
1044 md_flush_pending_output ();
1047 new_section = previous_section;
1048 new_subsection = previous_subsection;
1049 previous_section = now_seg;
1050 previous_subsection = now_subseg;
1051 subseg_set (new_section, new_subsection);
1053 #ifdef md_elf_section_change_hook
1054 md_elf_section_change_hook ();
1059 obj_elf_popsection (int xxx ATTRIBUTE_UNUSED)
1061 struct section_stack *top = section_stack;
1065 as_warn (_(".popsection without corresponding .pushsection; ignored"));
1069 #ifdef md_flush_pending_output
1070 md_flush_pending_output ();
1073 section_stack = top->next;
1074 previous_section = top->prev_seg;
1075 previous_subsection = top->prev_subseg;
1076 subseg_set (top->seg, top->subseg);
1079 #ifdef md_elf_section_change_hook
1080 md_elf_section_change_hook ();
1085 obj_elf_line (int ignore ATTRIBUTE_UNUSED)
1087 /* Assume delimiter is part of expression. BSD4.2 as fails with
1088 delightful bug, so we are not being incompatible here. */
1089 new_logical_line (NULL, get_absolute_expression ());
1090 demand_empty_rest_of_line ();
1093 /* This handles the .symver pseudo-op, which is used to specify a
1094 symbol version. The syntax is ``.symver NAME,SYMVERNAME''.
1095 SYMVERNAME may contain ELF_VER_CHR ('@') characters. This
1096 pseudo-op causes the assembler to emit a symbol named SYMVERNAME
1097 with the same value as the symbol NAME. */
1100 obj_elf_symver (int ignore ATTRIBUTE_UNUSED)
1107 name = input_line_pointer;
1108 c = get_symbol_end ();
1110 sym = symbol_find_or_make (name);
1112 *input_line_pointer = c;
1115 if (*input_line_pointer != ',')
1117 as_bad (_("expected comma after name in .symver"));
1118 ignore_rest_of_line ();
1122 ++input_line_pointer;
1124 name = input_line_pointer;
1126 /* Temporarily include '@' in symbol names. */
1127 old_lexat = lex_type[(unsigned char) '@'];
1128 lex_type[(unsigned char) '@'] |= LEX_NAME;
1129 c = get_symbol_end ();
1130 lex_type[(unsigned char) '@'] = old_lexat;
1132 if (symbol_get_obj (sym)->versioned_name == NULL)
1134 symbol_get_obj (sym)->versioned_name = xstrdup (name);
1136 *input_line_pointer = c;
1138 if (strchr (symbol_get_obj (sym)->versioned_name,
1139 ELF_VER_CHR) == NULL)
1141 as_bad (_("missing version name in `%s' for symbol `%s'"),
1142 symbol_get_obj (sym)->versioned_name,
1144 ignore_rest_of_line ();
1150 if (strcmp (symbol_get_obj (sym)->versioned_name, name))
1152 as_bad (_("multiple versions [`%s'|`%s'] for symbol `%s'"),
1153 name, symbol_get_obj (sym)->versioned_name,
1155 ignore_rest_of_line ();
1159 *input_line_pointer = c;
1162 demand_empty_rest_of_line ();
1165 /* This handles the .vtable_inherit pseudo-op, which is used to indicate
1166 to the linker the hierarchy in which a particular table resides. The
1167 syntax is ".vtable_inherit CHILDNAME, PARENTNAME". */
1170 obj_elf_vtable_inherit (int ignore ATTRIBUTE_UNUSED)
1172 char *cname, *pname;
1173 symbolS *csym, *psym;
1176 if (*input_line_pointer == '#')
1177 ++input_line_pointer;
1179 cname = input_line_pointer;
1180 c = get_symbol_end ();
1181 csym = symbol_find (cname);
1183 /* GCFIXME: should check that we don't have two .vtable_inherits for
1184 the same child symbol. Also, we can currently only do this if the
1185 child symbol is already exists and is placed in a fragment. */
1187 if (csym == NULL || symbol_get_frag (csym) == NULL)
1189 as_bad ("expected `%s' to have already been set for .vtable_inherit",
1194 *input_line_pointer = c;
1197 if (*input_line_pointer != ',')
1199 as_bad ("expected comma after name in .vtable_inherit");
1200 ignore_rest_of_line ();
1204 ++input_line_pointer;
1207 if (*input_line_pointer == '#')
1208 ++input_line_pointer;
1210 if (input_line_pointer[0] == '0'
1211 && (input_line_pointer[1] == '\0'
1212 || ISSPACE (input_line_pointer[1])))
1214 psym = section_symbol (absolute_section);
1215 ++input_line_pointer;
1219 pname = input_line_pointer;
1220 c = get_symbol_end ();
1221 psym = symbol_find_or_make (pname);
1222 *input_line_pointer = c;
1225 demand_empty_rest_of_line ();
1230 assert (symbol_get_value_expression (csym)->X_op == O_constant);
1231 return fix_new (symbol_get_frag (csym),
1232 symbol_get_value_expression (csym)->X_add_number,
1233 0, psym, 0, 0, BFD_RELOC_VTABLE_INHERIT);
1236 /* This handles the .vtable_entry pseudo-op, which is used to indicate
1237 to the linker that a vtable slot was used. The syntax is
1238 ".vtable_entry tablename, offset". */
1241 obj_elf_vtable_entry (int ignore ATTRIBUTE_UNUSED)
1248 if (*input_line_pointer == '#')
1249 ++input_line_pointer;
1251 name = input_line_pointer;
1252 c = get_symbol_end ();
1253 sym = symbol_find_or_make (name);
1254 *input_line_pointer = c;
1257 if (*input_line_pointer != ',')
1259 as_bad ("expected comma after name in .vtable_entry");
1260 ignore_rest_of_line ();
1264 ++input_line_pointer;
1265 if (*input_line_pointer == '#')
1266 ++input_line_pointer;
1268 offset = get_absolute_expression ();
1270 demand_empty_rest_of_line ();
1272 return fix_new (frag_now, frag_now_fix (), 0, sym, offset, 0,
1273 BFD_RELOC_VTABLE_ENTRY);
1277 elf_obj_read_begin_hook (void)
1279 #ifdef NEED_ECOFF_DEBUG
1280 if (ECOFF_DEBUGGING)
1281 ecoff_read_begin_hook ();
1286 elf_obj_symbol_new_hook (symbolS *symbolP)
1288 struct elf_obj_sy *sy_obj;
1290 sy_obj = symbol_get_obj (symbolP);
1291 sy_obj->size = NULL;
1292 sy_obj->versioned_name = NULL;
1294 #ifdef NEED_ECOFF_DEBUG
1295 if (ECOFF_DEBUGGING)
1296 ecoff_symbol_new_hook (symbolP);
1300 /* When setting one symbol equal to another, by default we probably
1301 want them to have the same "size", whatever it means in the current
1305 elf_copy_symbol_attributes (symbolS *dest, symbolS *src)
1307 struct elf_obj_sy *srcelf = symbol_get_obj (src);
1308 struct elf_obj_sy *destelf = symbol_get_obj (dest);
1311 if (destelf->size == NULL)
1312 destelf->size = xmalloc (sizeof (expressionS));
1313 *destelf->size = *srcelf->size;
1317 if (destelf->size != NULL)
1318 free (destelf->size);
1319 destelf->size = NULL;
1321 S_SET_SIZE (dest, S_GET_SIZE (src));
1322 /* Don't copy visibility. */
1323 S_SET_OTHER (dest, (ELF_ST_VISIBILITY (S_GET_OTHER (dest))
1324 | (S_GET_OTHER (src) & ~ELF_ST_VISIBILITY (-1))));
1328 obj_elf_version (int ignore ATTRIBUTE_UNUSED)
1333 asection *seg = now_seg;
1334 subsegT subseg = now_subseg;
1335 Elf_Internal_Note i_note;
1336 Elf_External_Note e_note;
1337 asection *note_secp = NULL;
1341 if (*input_line_pointer == '\"')
1343 ++input_line_pointer; /* -> 1st char of string. */
1344 name = input_line_pointer;
1346 while (is_a_char (c = next_char_of_string ()))
1348 c = *input_line_pointer;
1349 *input_line_pointer = '\0';
1350 *(input_line_pointer - 1) = '\0';
1351 *input_line_pointer = c;
1353 /* create the .note section */
1355 note_secp = subseg_new (".note", 0);
1356 bfd_set_section_flags (stdoutput,
1358 SEC_HAS_CONTENTS | SEC_READONLY);
1360 /* process the version string */
1362 len = strlen (name);
1364 i_note.namesz = ((len + 1) + 3) & ~3; /* round this to word boundary */
1365 i_note.descsz = 0; /* no description */
1366 i_note.type = NT_VERSION;
1367 p = frag_more (sizeof (e_note.namesz));
1368 md_number_to_chars (p, i_note.namesz, sizeof (e_note.namesz));
1369 p = frag_more (sizeof (e_note.descsz));
1370 md_number_to_chars (p, i_note.descsz, sizeof (e_note.descsz));
1371 p = frag_more (sizeof (e_note.type));
1372 md_number_to_chars (p, i_note.type, sizeof (e_note.type));
1373 p = frag_more (len + 1);
1376 frag_align (2, 0, 0);
1378 subseg_set (seg, subseg);
1382 as_bad (_("expected quoted string"));
1384 demand_empty_rest_of_line ();
1388 obj_elf_size (int ignore ATTRIBUTE_UNUSED)
1390 char *name = input_line_pointer;
1391 char c = get_symbol_end ();
1396 p = input_line_pointer;
1399 if (*input_line_pointer != ',')
1402 as_bad (_("expected comma after name `%s' in .size directive"), name);
1404 ignore_rest_of_line ();
1407 input_line_pointer++;
1409 if (exp.X_op == O_absent)
1411 as_bad (_("missing expression in .size directive"));
1412 exp.X_op = O_constant;
1413 exp.X_add_number = 0;
1416 sym = symbol_find_or_make (name);
1418 if (exp.X_op == O_constant)
1420 S_SET_SIZE (sym, exp.X_add_number);
1421 if (symbol_get_obj (sym)->size)
1423 xfree (symbol_get_obj (sym)->size);
1424 symbol_get_obj (sym)->size = NULL;
1429 symbol_get_obj (sym)->size = xmalloc (sizeof (expressionS));
1430 *symbol_get_obj (sym)->size = exp;
1432 demand_empty_rest_of_line ();
1435 /* Handle the ELF .type pseudo-op. This sets the type of a symbol.
1436 There are five syntaxes:
1438 The first (used on Solaris) is
1440 The second (used on UnixWare) is
1442 The third (reportedly to be used on Irix 6.0) is
1444 The fourth (used on NetBSD/Arm and Linux/ARM) is
1446 The fifth (used on SVR4/860) is
1447 .type SYM,"function"
1451 obj_elf_type (int ignore ATTRIBUTE_UNUSED)
1456 const char *typename;
1458 elf_symbol_type *elfsym;
1460 name = input_line_pointer;
1461 c = get_symbol_end ();
1462 sym = symbol_find_or_make (name);
1463 elfsym = (elf_symbol_type *) symbol_get_bfdsym (sym);
1464 *input_line_pointer = c;
1467 if (*input_line_pointer == ',')
1468 ++input_line_pointer;
1471 if ( *input_line_pointer == '#'
1472 || *input_line_pointer == '@'
1473 || *input_line_pointer == '"'
1474 || *input_line_pointer == '%')
1475 ++input_line_pointer;
1477 typename = input_line_pointer;
1478 c = get_symbol_end ();
1481 if (strcmp (typename, "function") == 0
1482 || strcmp (typename, "STT_FUNC") == 0)
1483 type = BSF_FUNCTION;
1484 else if (strcmp (typename, "object") == 0
1485 || strcmp (typename, "STT_OBJECT") == 0)
1487 else if (strcmp (typename, "tls_object") == 0
1488 || strcmp (typename, "STT_TLS") == 0)
1489 type = BSF_OBJECT | BSF_THREAD_LOCAL;
1490 else if (strcmp (typename, "notype") == 0
1491 || strcmp (typename, "STT_NOTYPE") == 0)
1493 #ifdef md_elf_symbol_type
1494 else if ((type = md_elf_symbol_type (typename, sym, elfsym)) != -1)
1498 as_bad (_("unrecognized symbol type \"%s\""), typename);
1500 *input_line_pointer = c;
1502 if (*input_line_pointer == '"')
1503 ++input_line_pointer;
1505 elfsym->symbol.flags |= type;
1507 demand_empty_rest_of_line ();
1511 obj_elf_ident (int ignore ATTRIBUTE_UNUSED)
1513 static segT comment_section;
1514 segT old_section = now_seg;
1515 int old_subsection = now_subseg;
1517 #ifdef md_flush_pending_output
1518 md_flush_pending_output ();
1521 if (!comment_section)
1524 comment_section = subseg_new (".comment", 0);
1525 bfd_set_section_flags (stdoutput, comment_section,
1526 SEC_READONLY | SEC_HAS_CONTENTS);
1531 subseg_set (comment_section, 0);
1533 subseg_set (old_section, old_subsection);
1536 #ifdef INIT_STAB_SECTION
1538 /* The first entry in a .stabs section is special. */
1541 obj_elf_init_stab_section (segT seg)
1546 unsigned int stroff;
1548 /* Force the section to align to a longword boundary. Without this,
1549 UnixWare ar crashes. */
1550 bfd_set_section_alignment (stdoutput, seg, 2);
1552 /* Make space for this first symbol. */
1556 as_where (&file, NULL);
1557 stabstr_name = xmalloc (strlen (segment_name (seg)) + 4);
1558 strcpy (stabstr_name, segment_name (seg));
1559 strcat (stabstr_name, "str");
1560 stroff = get_stab_string_offset (file, stabstr_name);
1562 md_number_to_chars (p, stroff, 4);
1563 seg_info (seg)->stabu.p = p;
1568 /* Fill in the counts in the first entry in a .stabs section. */
1571 adjust_stab_sections (bfd *abfd, asection *sec, void *xxx ATTRIBUTE_UNUSED)
1578 if (strncmp (".stab", sec->name, 5))
1580 if (!strcmp ("str", sec->name + strlen (sec->name) - 3))
1583 name = alloca (strlen (sec->name) + 4);
1584 strcpy (name, sec->name);
1585 strcat (name, "str");
1586 strsec = bfd_get_section_by_name (abfd, name);
1588 strsz = bfd_section_size (abfd, strsec);
1591 nsyms = bfd_section_size (abfd, sec) / 12 - 1;
1593 p = seg_info (sec)->stabu.p;
1596 bfd_h_put_16 (abfd, nsyms, p + 6);
1597 bfd_h_put_32 (abfd, strsz, p + 8);
1600 #ifdef NEED_ECOFF_DEBUG
1602 /* This function is called by the ECOFF code. It is supposed to
1603 record the external symbol information so that the backend can
1604 write it out correctly. The ELF backend doesn't actually handle
1605 this at the moment, so we do it ourselves. We save the information
1609 elf_ecoff_set_ext (symbolS *sym, struct ecoff_extr *ext)
1611 symbol_get_bfdsym (sym)->udata.p = ext;
1614 /* This function is called by bfd_ecoff_debug_externals. It is
1615 supposed to *EXT to the external symbol information, and return
1616 whether the symbol should be used at all. */
1619 elf_get_extr (asymbol *sym, EXTR *ext)
1621 if (sym->udata.p == NULL)
1623 *ext = *(EXTR *) sym->udata.p;
1627 /* This function is called by bfd_ecoff_debug_externals. It has
1628 nothing to do for ELF. */
1631 elf_set_index (asymbol *sym ATTRIBUTE_UNUSED,
1632 bfd_size_type indx ATTRIBUTE_UNUSED)
1636 #endif /* NEED_ECOFF_DEBUG */
1639 elf_frob_symbol (symbolS *symp, int *puntp)
1641 struct elf_obj_sy *sy_obj;
1643 #ifdef NEED_ECOFF_DEBUG
1644 if (ECOFF_DEBUGGING)
1645 ecoff_frob_symbol (symp);
1648 sy_obj = symbol_get_obj (symp);
1650 if (sy_obj->size != NULL)
1652 switch (sy_obj->size->X_op)
1656 (S_GET_VALUE (sy_obj->size->X_add_symbol)
1657 + sy_obj->size->X_add_number
1658 - S_GET_VALUE (sy_obj->size->X_op_symbol)));
1662 (S_GET_VALUE (sy_obj->size->X_add_symbol)
1663 + sy_obj->size->X_add_number));
1666 as_bad (_(".size expression too complicated to fix up"));
1669 free (sy_obj->size);
1670 sy_obj->size = NULL;
1673 if (sy_obj->versioned_name != NULL)
1677 p = strchr (sy_obj->versioned_name, ELF_VER_CHR);
1680 /* This symbol was given a new name with the .symver directive.
1682 If this is an external reference, just rename the symbol to
1683 include the version string. This will make the relocs be
1684 against the correct versioned symbol.
1686 If this is a definition, add an alias. FIXME: Using an alias
1687 will permit the debugging information to refer to the right
1688 symbol. However, it's not clear whether it is the best
1691 if (! S_IS_DEFINED (symp))
1693 /* Verify that the name isn't using the @@ syntax--this is
1694 reserved for definitions of the default version to link
1696 if (p[1] == ELF_VER_CHR)
1698 as_bad (_("invalid attempt to declare external version name as default in symbol `%s'"),
1699 sy_obj->versioned_name);
1702 S_SET_NAME (symp, sy_obj->versioned_name);
1706 if (p[1] == ELF_VER_CHR && p[2] == ELF_VER_CHR)
1710 /* The @@@ syntax is a special case. It renames the
1711 symbol name to versioned_name with one `@' removed. */
1712 l = strlen (&p[3]) + 1;
1713 memmove (&p[2], &p[3], l);
1714 S_SET_NAME (symp, sy_obj->versioned_name);
1720 /* FIXME: Creating a new symbol here is risky. We're
1721 in the final loop over the symbol table. We can
1722 get away with it only because the symbol goes to
1723 the end of the list, where the loop will still see
1724 it. It would probably be better to do this in
1725 obj_frob_file_before_adjust. */
1727 symp2 = symbol_find_or_make (sy_obj->versioned_name);
1729 /* Now we act as though we saw symp2 = sym. */
1731 S_SET_SEGMENT (symp2, S_GET_SEGMENT (symp));
1733 /* Subtracting out the frag address here is a hack
1734 because we are in the middle of the final loop. */
1737 - symbol_get_frag (symp)->fr_address));
1739 symbol_set_frag (symp2, symbol_get_frag (symp));
1741 /* This will copy over the size information. */
1742 copy_symbol_attributes (symp2, symp);
1744 S_SET_OTHER (symp2, S_GET_OTHER (symp));
1746 if (S_IS_WEAK (symp))
1749 if (S_IS_EXTERNAL (symp))
1750 S_SET_EXTERNAL (symp2);
1755 /* Double check weak symbols. */
1756 if (S_IS_WEAK (symp))
1758 if (S_IS_COMMON (symp))
1759 as_bad (_("symbol `%s' can not be both weak and common"),
1764 /* The Irix 5 and 6 assemblers set the type of any common symbol and
1765 any undefined non-function symbol to STT_OBJECT. We try to be
1766 compatible, since newer Irix 5 and 6 linkers care. However, we
1767 only set undefined symbols to be STT_OBJECT if we are on Irix,
1768 because that is the only time gcc will generate the necessary
1769 .global directives to mark functions. */
1771 if (S_IS_COMMON (symp))
1772 symbol_get_bfdsym (symp)->flags |= BSF_OBJECT;
1774 if (strstr (TARGET_OS, "irix") != NULL
1775 && ! S_IS_DEFINED (symp)
1776 && (symbol_get_bfdsym (symp)->flags & BSF_FUNCTION) == 0)
1777 symbol_get_bfdsym (symp)->flags |= BSF_OBJECT;
1781 /* If TC_PPC is defined, we used to force the type of a symbol to be
1782 BSF_OBJECT if it was otherwise unset. This was required by some
1783 version of VxWorks. Thomas de Lellis <tdel@windriver.com> says
1784 that this is no longer needed, so it is now commented out. */
1785 if ((symbol_get_bfdsym (symp)->flags
1786 & (BSF_FUNCTION | BSF_FILE | BSF_SECTION_SYM)) == 0
1787 && S_IS_DEFINED (symp))
1788 symbol_get_bfdsym (symp)->flags |= BSF_OBJECT;
1794 asection **head; /* Section lists. */
1795 unsigned int *elt_count; /* Number of sections in each list. */
1796 unsigned int num_group; /* Number of lists. */
1799 /* Called via bfd_map_over_sections. If SEC is a member of a group,
1800 add it to a list of sections belonging to the group. INF is a
1801 pointer to a struct group_list, which is where we store the head of
1805 build_group_lists (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *inf)
1807 struct group_list *list = inf;
1808 const char *group_name = elf_group_name (sec);
1811 if (group_name == NULL)
1814 /* If this group already has a list, add the section to the head of
1816 for (i = 0; i < list->num_group; i++)
1818 if (strcmp (group_name, elf_group_name (list->head[i])) == 0)
1820 elf_next_in_group (sec) = list->head[i];
1821 list->head[i] = sec;
1822 list->elt_count[i] += 1;
1827 /* New group. Make the arrays bigger in chunks to minimize calls to
1829 i = list->num_group;
1832 unsigned int newsize = i + 128;
1833 list->head = xrealloc (list->head, newsize * sizeof (*list->head));
1834 list->elt_count = xrealloc (list->elt_count,
1835 newsize * sizeof (*list->elt_count));
1837 list->head[i] = sec;
1838 list->elt_count[i] = 1;
1839 list->num_group += 1;
1843 elf_frob_file (void)
1845 struct group_list list;
1848 bfd_map_over_sections (stdoutput, adjust_stab_sections, NULL);
1850 /* Go find section groups. */
1853 list.elt_count = NULL;
1854 bfd_map_over_sections (stdoutput, build_group_lists, &list);
1856 /* Make the SHT_GROUP sections that describe each section group. We
1857 can't set up the section contents here yet, because elf section
1858 indices have yet to be calculated. elf.c:set_group_contents does
1859 the rest of the work. */
1860 for (i = 0; i < list.num_group; i++)
1862 const char *group_name = elf_group_name (list.head[i]);
1863 const char *sec_name;
1869 flags = SEC_READONLY | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_GROUP;
1870 for (s = list.head[i]; s != NULL; s = elf_next_in_group (s))
1871 if ((s->flags ^ flags) & SEC_LINK_ONCE)
1873 flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
1874 if (s != list.head[i])
1876 as_warn (_("assuming all members of group `%s' are COMDAT"),
1882 sec_name = group_name;
1883 sy = symbol_find_exact (group_name);
1886 && (sy == symbol_lastP
1887 || (sy->sy_next != NULL
1888 && sy->sy_next->sy_previous == sy)))
1891 sec_name = ".group";
1893 s = subseg_force_new (sec_name, 0);
1895 || !bfd_set_section_flags (stdoutput, s, flags)
1896 || !bfd_set_section_alignment (stdoutput, s, 2))
1898 as_fatal (_("can't create group: %s"),
1899 bfd_errmsg (bfd_get_error ()));
1901 elf_section_type (s) = SHT_GROUP;
1903 /* Pass a pointer to the first section in this group. */
1904 elf_next_in_group (s) = list.head[i];
1906 elf_group_id (s) = sy->bsym;
1908 s->_raw_size = 4 * (list.elt_count[i] + 1);
1909 s->contents = frag_more (s->_raw_size);
1910 frag_now->fr_fix = frag_now_fix_octets ();
1913 #ifdef elf_tc_final_processing
1914 elf_tc_final_processing ();
1918 /* It removes any unneeded versioned symbols from the symbol table. */
1921 elf_frob_file_before_adjust (void)
1927 for (symp = symbol_rootP; symp; symp = symbol_next (symp))
1928 if (!S_IS_DEFINED (symp))
1930 if (symbol_get_obj (symp)->versioned_name)
1934 /* The @@@ syntax is a special case. If the symbol is
1935 not defined, 2 `@'s will be removed from the
1938 p = strchr (symbol_get_obj (symp)->versioned_name,
1941 if (p[1] == ELF_VER_CHR && p[2] == ELF_VER_CHR)
1943 size_t l = strlen (&p[3]) + 1;
1944 memmove (&p[1], &p[3], l);
1946 if (symbol_used_p (symp) == 0
1947 && symbol_used_in_reloc_p (symp) == 0)
1948 symbol_remove (symp, &symbol_rootP, &symbol_lastP);
1951 /* If there was .weak foo, but foo was neither defined nor
1952 used anywhere, remove it. */
1954 else if (S_IS_WEAK (symp)
1955 && symbol_used_p (symp) == 0
1956 && symbol_used_in_reloc_p (symp) == 0)
1957 symbol_remove (symp, &symbol_rootP, &symbol_lastP);
1962 /* It is required that we let write_relocs have the opportunity to
1963 optimize away fixups before output has begun, since it is possible
1964 to eliminate all fixups for a section and thus we never should
1965 have generated the relocation section. */
1968 elf_frob_file_after_relocs (void)
1970 #ifdef NEED_ECOFF_DEBUG
1971 if (ECOFF_DEBUGGING)
1972 /* Generate the ECOFF debugging information. */
1974 const struct ecoff_debug_swap *debug_swap;
1975 struct ecoff_debug_info debug;
1980 = get_elf_backend_data (stdoutput)->elf_backend_ecoff_debug_swap;
1981 know (debug_swap != NULL);
1982 ecoff_build_debug (&debug.symbolic_header, &buf, debug_swap);
1984 /* Set up the pointers in debug. */
1985 #define SET(ptr, offset, type) \
1986 debug.ptr = (type) (buf + debug.symbolic_header.offset)
1988 SET (line, cbLineOffset, unsigned char *);
1989 SET (external_dnr, cbDnOffset, void *);
1990 SET (external_pdr, cbPdOffset, void *);
1991 SET (external_sym, cbSymOffset, void *);
1992 SET (external_opt, cbOptOffset, void *);
1993 SET (external_aux, cbAuxOffset, union aux_ext *);
1994 SET (ss, cbSsOffset, char *);
1995 SET (external_fdr, cbFdOffset, void *);
1996 SET (external_rfd, cbRfdOffset, void *);
1997 /* ssext and external_ext are set up just below. */
2001 /* Set up the external symbols. */
2002 debug.ssext = debug.ssext_end = NULL;
2003 debug.external_ext = debug.external_ext_end = NULL;
2004 if (! bfd_ecoff_debug_externals (stdoutput, &debug, debug_swap, TRUE,
2005 elf_get_extr, elf_set_index))
2006 as_fatal (_("failed to set up debugging information: %s"),
2007 bfd_errmsg (bfd_get_error ()));
2009 sec = bfd_get_section_by_name (stdoutput, ".mdebug");
2010 assert (sec != NULL);
2012 know (!stdoutput->output_has_begun);
2014 /* We set the size of the section, call bfd_set_section_contents
2015 to force the ELF backend to allocate a file position, and then
2016 write out the data. FIXME: Is this really the best way to do
2018 sec->_raw_size = bfd_ecoff_debug_size (stdoutput, &debug, debug_swap);
2020 /* Pass BUF to bfd_set_section_contents because this will
2021 eventually become a call to fwrite, and ISO C prohibits
2022 passing a NULL pointer to a stdio function even if the
2023 pointer will not be used. */
2024 if (! bfd_set_section_contents (stdoutput, sec, buf, 0, 0))
2025 as_fatal (_("can't start writing .mdebug section: %s"),
2026 bfd_errmsg (bfd_get_error ()));
2028 know (stdoutput->output_has_begun);
2029 know (sec->filepos != 0);
2031 if (! bfd_ecoff_write_debug (stdoutput, &debug, debug_swap,
2033 as_fatal (_("could not write .mdebug section: %s"),
2034 bfd_errmsg (bfd_get_error ()));
2036 #endif /* NEED_ECOFF_DEBUG */
2041 /* Heavily plagiarized from obj_elf_version. The idea is to emit the
2042 SCO specific identifier in the .notes section to satisfy the SCO
2045 This looks more complicated than it really is. As opposed to the
2046 "obvious" solution, this should handle the cross dev cases
2047 correctly. (i.e, hosting on a 64 bit big endian processor, but
2048 generating SCO Elf code) Efficiency isn't a concern, as there
2049 should be exactly one of these sections per object module.
2051 SCO OpenServer 5 identifies it's ELF modules with a standard ELF
2054 int_32 namesz = 4 ; Name size
2055 int_32 descsz = 12 ; Descriptive information
2057 char name[4] = "SCO" ; Originator name ALWAYS SCO + NULL
2058 int_32 version = (major ver # << 16) | version of tools ;
2059 int_32 source = (tool_id << 16 ) | 1 ;
2060 int_32 info = 0 ; These are set by the SCO tools, but we
2061 don't know enough about the source
2062 environment to set them. SCO ld currently
2063 ignores them, and recommends we set them
2066 #define SCO_MAJOR_VERSION 0x1
2067 #define SCO_MINOR_VERSION 0x1
2077 asection *seg = now_seg;
2078 subsegT subseg = now_subseg;
2079 Elf_Internal_Note i_note;
2080 Elf_External_Note e_note;
2081 asection *note_secp = NULL;
2084 /* create the .note section */
2086 note_secp = subseg_new (".note", 0);
2087 bfd_set_section_flags (stdoutput,
2089 SEC_HAS_CONTENTS | SEC_READONLY);
2091 /* process the version string */
2094 i_note.descsz = 12; /* 12 descriptive bytes */
2095 i_note.type = NT_VERSION; /* Contains a version string */
2097 p = frag_more (sizeof (i_note.namesz));
2098 md_number_to_chars (p, i_note.namesz, 4);
2100 p = frag_more (sizeof (i_note.descsz));
2101 md_number_to_chars (p, i_note.descsz, 4);
2103 p = frag_more (sizeof (i_note.type));
2104 md_number_to_chars (p, i_note.type, 4);
2109 /* Note: this is the version number of the ELF we're representing */
2111 md_number_to_chars (p, (SCO_MAJOR_VERSION << 16) | (SCO_MINOR_VERSION), 4);
2113 /* Here, we pick a magic number for ourselves (yes, I "registered"
2114 it with SCO. The bottom bit shows that we are compat with the
2117 md_number_to_chars (p, 0x4c520000 | 0x0001, 4);
2119 /* If we knew (or cared) what the source language options were, we'd
2120 fill them in here. SCO has given us permission to ignore these
2121 and just set them to zero. */
2123 md_number_to_chars (p, 0x0000, 4);
2125 frag_align (2, 0, 0);
2127 /* We probably can't restore the current segment, for there likely
2130 subseg_set (seg, subseg);
2134 #endif /* SCO_ELF */
2137 elf_separate_stab_sections (void)
2139 #ifdef NEED_ECOFF_DEBUG
2140 return (!ECOFF_DEBUGGING);
2147 elf_init_stab_section (segT seg)
2149 #ifdef NEED_ECOFF_DEBUG
2150 if (!ECOFF_DEBUGGING)
2152 obj_elf_init_stab_section (seg);
2155 const struct format_ops elf_format_ops =
2157 bfd_target_elf_flavour,
2158 0, /* dfl_leading_underscore */
2159 1, /* emit_section_symbols */
2164 elf_frob_file_before_adjust,
2165 0, /* obj_frob_file_before_fix */
2166 elf_frob_file_after_relocs,
2167 elf_s_get_size, elf_s_set_size,
2168 elf_s_get_align, elf_s_set_align,
2175 elf_copy_symbol_attributes,
2176 #ifdef NEED_ECOFF_DEBUG
2177 ecoff_generate_asm_lineno,
2180 0, /* generate_asm_lineno */
2181 0, /* process_stab */
2183 elf_separate_stab_sections,
2184 elf_init_stab_section,
2185 elf_sec_sym_ok_for_reloc,
2187 #ifdef NEED_ECOFF_DEBUG
2190 0, /* ecoff_set_ext */
2192 elf_obj_read_begin_hook,
2193 elf_obj_symbol_new_hook