1 /* Object file "section" support for the BFD library.
2 Copyright (C) 1990, 91, 92, 93, 94, 95, 1996 Free Software Foundation, Inc.
3 Written by Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 The raw data contained within a BFD is maintained through the
26 section abstraction. A single BFD may have any number of
27 sections. It keeps hold of them by pointing to the first;
28 each one points to the next in the list.
30 Sections are supported in BFD in <<section.c>>.
36 @* section prototypes::
40 Section Input, Section Output, Sections, Sections
44 When a BFD is opened for reading, the section structures are
45 created and attached to the BFD.
47 Each section has a name which describes the section in the
48 outside world---for example, <<a.out>> would contain at least
49 three sections, called <<.text>>, <<.data>> and <<.bss>>.
51 Names need not be unique; for example a COFF file may have several
52 sections named <<.data>>.
54 Sometimes a BFD will contain more than the ``natural'' number of
55 sections. A back end may attach other sections containing
56 constructor data, or an application may add a section (using
57 <<bfd_make_section>>) to the sections attached to an already open
58 BFD. For example, the linker creates an extra section
59 <<COMMON>> for each input file's BFD to hold information about
62 The raw data is not necessarily read in when
63 the section descriptor is created. Some targets may leave the
64 data in place until a <<bfd_get_section_contents>> call is
65 made. Other back ends may read in all the data at once. For
66 example, an S-record file has to be read once to determine the
67 size of the data. An IEEE-695 file doesn't contain raw data in
68 sections, but data and relocation expressions intermixed, so
69 the data area has to be parsed to get out the data and
73 Section Output, typedef asection, Section Input, Sections
78 To write a new object style BFD, the various sections to be
79 written have to be created. They are attached to the BFD in
80 the same way as input sections; data is written to the
81 sections using <<bfd_set_section_contents>>.
83 Any program that creates or combines sections (e.g., the assembler
84 and linker) must use the <<asection>> fields <<output_section>> and
85 <<output_offset>> to indicate the file sections to which each
86 section must be written. (If the section is being created from
87 scratch, <<output_section>> should probably point to the section
88 itself and <<output_offset>> should probably be zero.)
90 The data to be written comes from input sections attached
91 (via <<output_section>> pointers) to
92 the output sections. The output section structure can be
93 considered a filter for the input section: the output section
94 determines the vma of the output data and the name, but the
95 input section determines the offset into the output section of
96 the data to be written.
98 E.g., to create a section "O", starting at 0x100, 0x123 long,
99 containing two subsections, "A" at offset 0x0 (i.e., at vma
100 0x100) and "B" at offset 0x20 (i.e., at vma 0x120) the <<asection>>
101 structures would look like:
106 | output_section -----------> section name "O"
108 | section name "B" | size 0x123
109 | output_offset 0x20 |
111 | output_section --------|
117 The data within a section is stored in a @dfn{link_order}.
118 These are much like the fixups in <<gas>>. The link_order
119 abstraction allows a section to grow and shrink within itself.
121 A link_order knows how big it is, and which is the next
122 link_order and where the raw data for it is; it also points to
123 a list of relocations which apply to it.
125 The link_order is used by the linker to perform relaxing on
126 final code. The compiler creates code which is as big as
127 necessary to make it work without relaxing, and the user can
128 select whether to relax. Sometimes relaxing takes a lot of
129 time. The linker runs around the relocations to see if any
130 are attached to data which can be shrunk, if so it does it on
131 a link_order by link_order basis.
144 typedef asection, section prototypes, Section Output, Sections
148 Here is the section structure:
154 . {* The name of the section; the name isn't a copy, the pointer is
155 . the same as that passed to bfd_make_section. *}
159 . {* Which section is it; 0..nth. *}
163 . {* The next section in the list belonging to the BFD, or NULL. *}
167 . {* The field flags contains attributes of the section. Some
168 . flags are read in from the object file, and some are
169 . synthesized from other information. *}
173 .#define SEC_NO_FLAGS 0x000
175 . {* Tells the OS to allocate space for this section when loading.
176 . This is clear for a section containing debug information
178 .#define SEC_ALLOC 0x001
180 . {* Tells the OS to load the section from the file when loading.
181 . This is clear for a .bss section. *}
182 .#define SEC_LOAD 0x002
184 . {* The section contains data still to be relocated, so there is
185 . some relocation information too. *}
186 .#define SEC_RELOC 0x004
188 .#if 0 {* Obsolete ? *}
189 .#define SEC_BALIGN 0x008
192 . {* A signal to the OS that the section contains read only
194 .#define SEC_READONLY 0x010
196 . {* The section contains code only. *}
197 .#define SEC_CODE 0x020
199 . {* The section contains data only. *}
200 .#define SEC_DATA 0x040
202 . {* The section will reside in ROM. *}
203 .#define SEC_ROM 0x080
205 . {* The section contains constructor information. This section
206 . type is used by the linker to create lists of constructors and
207 . destructors used by <<g++>>. When a back end sees a symbol
208 . which should be used in a constructor list, it creates a new
209 . section for the type of name (e.g., <<__CTOR_LIST__>>), attaches
210 . the symbol to it, and builds a relocation. To build the lists
211 . of constructors, all the linker has to do is catenate all the
212 . sections called <<__CTOR_LIST__>> and relocate the data
213 . contained within - exactly the operations it would peform on
215 .#define SEC_CONSTRUCTOR 0x100
217 . {* The section is a constuctor, and should be placed at the
218 . end of the text, data, or bss section(?). *}
219 .#define SEC_CONSTRUCTOR_TEXT 0x1100
220 .#define SEC_CONSTRUCTOR_DATA 0x2100
221 .#define SEC_CONSTRUCTOR_BSS 0x3100
223 . {* The section has contents - a data section could be
224 . <<SEC_ALLOC>> | <<SEC_HAS_CONTENTS>>; a debug section could be
225 . <<SEC_HAS_CONTENTS>> *}
226 .#define SEC_HAS_CONTENTS 0x200
228 . {* An instruction to the linker to not output the section
229 . even if it has information which would normally be written. *}
230 .#define SEC_NEVER_LOAD 0x400
232 . {* The section is a COFF shared library section. This flag is
233 . only for the linker. If this type of section appears in
234 . the input file, the linker must copy it to the output file
235 . without changing the vma or size. FIXME: Although this
236 . was originally intended to be general, it really is COFF
237 . specific (and the flag was renamed to indicate this). It
238 . might be cleaner to have some more general mechanism to
239 . allow the back end to control what the linker does with
241 .#define SEC_COFF_SHARED_LIBRARY 0x800
243 . {* The section is a common section (symbols may be defined
244 . multiple times, the value of a symbol is the amount of
245 . space it requires, and the largest symbol value is the one
246 . used). Most targets have exactly one of these (which we
247 . translate to bfd_com_section_ptr), but ECOFF has two. *}
248 .#define SEC_IS_COMMON 0x8000
250 . {* The section contains only debugging information. For
251 . example, this is set for ELF .debug and .stab sections.
252 . strip tests this flag to see if a section can be
254 .#define SEC_DEBUGGING 0x10000
256 . {* The contents of this section are held in memory pointed to
257 . by the contents field. This is checked by
258 . bfd_get_section_contents, and the data is retrieved from
259 . memory if appropriate. *}
260 .#define SEC_IN_MEMORY 0x20000
262 . {* The contents of this section are to be excluded by the
263 . linker for executable and shared objects unless those
264 . objects are to be further relocated. *}
265 .#define SEC_EXCLUDE 0x40000
267 . {* The contents of this section are to be sorted by the
268 . based on the address specified in the associated symbol
270 .#define SEC_SORT_ENTRIES 0x80000
272 . {* A mark flag used by some of the linker backends. This
273 . should not be set by application code. *}
274 .#define SEC_LINKER_MARK 0x100000
276 . {* End of section flags. *}
278 . {* The virtual memory address of the section - where it will be
279 . at run time. The symbols are relocated against this. The
280 . user_set_vma flag is maintained by bfd; if it's not set, the
281 . backend can assign addresses (for example, in <<a.out>>, where
282 . the default address for <<.data>> is dependent on the specific
283 . target and various flags). *}
286 . boolean user_set_vma;
288 . {* The load address of the section - where it would be in a
289 . rom image; really only used for writing section header
294 . {* The size of the section in bytes, as it will be output.
295 . contains a value even if the section has no contents (e.g., the
296 . size of <<.bss>>). This will be filled in after relocation *}
298 . bfd_size_type _cooked_size;
300 . {* The original size on disk of the section, in bytes. Normally this
301 . value is the same as the size, but if some relaxing has
302 . been done, then this value will be bigger. *}
304 . bfd_size_type _raw_size;
306 . {* If this section is going to be output, then this value is the
307 . offset into the output section of the first byte in the input
308 . section. E.g., if this was going to start at the 100th byte in
309 . the output section, this value would be 100. *}
311 . bfd_vma output_offset;
313 . {* The output section through which to map on output. *}
315 . struct sec *output_section;
317 . {* The alignment requirement of the section, as an exponent of 2 -
318 . e.g., 3 aligns to 2^3 (or 8). *}
320 . unsigned int alignment_power;
322 . {* If an input section, a pointer to a vector of relocation
323 . records for the data in this section. *}
325 . struct reloc_cache_entry *relocation;
327 . {* If an output section, a pointer to a vector of pointers to
328 . relocation records for the data in this section. *}
330 . struct reloc_cache_entry **orelocation;
332 . {* The number of relocation records in one of the above *}
334 . unsigned reloc_count;
336 . {* Information below is back end specific - and not always used
339 . {* File position of section data *}
343 . {* File position of relocation info *}
345 . file_ptr rel_filepos;
347 . {* File position of line data *}
349 . file_ptr line_filepos;
351 . {* Pointer to data for applications *}
355 . {* If the SEC_IN_MEMORY flag is set, this points to the actual
357 . unsigned char *contents;
359 . {* Attached line number information *}
363 . {* Number of line number records *}
365 . unsigned int lineno_count;
367 . {* When a section is being output, this value changes as more
368 . linenumbers are written out *}
370 . file_ptr moving_line_filepos;
372 . {* What the section number is in the target world *}
378 . {* If this is a constructor section then here is a list of the
379 . relocations created to relocate items within it. *}
381 . struct relent_chain *constructor_chain;
383 . {* The BFD which owns the section. *}
387 . boolean reloc_done;
388 . {* A symbol which points at this section only *}
389 . struct symbol_cache_entry *symbol;
390 . struct symbol_cache_entry **symbol_ptr_ptr;
392 . struct bfd_link_order *link_order_head;
393 . struct bfd_link_order *link_order_tail;
396 . {* These sections are global, and are managed by BFD. The application
397 . and target back end are not permitted to change the values in
398 . these sections. New code should use the section_ptr macros rather
399 . than referring directly to the const sections. The const sections
400 . may eventually vanish. *}
401 .#define BFD_ABS_SECTION_NAME "*ABS*"
402 .#define BFD_UND_SECTION_NAME "*UND*"
403 .#define BFD_COM_SECTION_NAME "*COM*"
404 .#define BFD_IND_SECTION_NAME "*IND*"
406 . {* the absolute section *}
407 .extern const asection bfd_abs_section;
408 .#define bfd_abs_section_ptr ((asection *) &bfd_abs_section)
409 .#define bfd_is_abs_section(sec) ((sec) == bfd_abs_section_ptr)
410 . {* Pointer to the undefined section *}
411 .extern const asection bfd_und_section;
412 .#define bfd_und_section_ptr ((asection *) &bfd_und_section)
413 .#define bfd_is_und_section(sec) ((sec) == bfd_und_section_ptr)
414 . {* Pointer to the common section *}
415 .extern const asection bfd_com_section;
416 .#define bfd_com_section_ptr ((asection *) &bfd_com_section)
417 . {* Pointer to the indirect section *}
418 .extern const asection bfd_ind_section;
419 .#define bfd_ind_section_ptr ((asection *) &bfd_ind_section)
420 .#define bfd_is_ind_section(sec) ((sec) == bfd_ind_section_ptr)
422 .extern const struct symbol_cache_entry * const bfd_abs_symbol;
423 .extern const struct symbol_cache_entry * const bfd_com_symbol;
424 .extern const struct symbol_cache_entry * const bfd_und_symbol;
425 .extern const struct symbol_cache_entry * const bfd_ind_symbol;
426 .#define bfd_get_section_size_before_reloc(section) \
427 . (section->reloc_done ? (abort(),1): (section)->_raw_size)
428 .#define bfd_get_section_size_after_reloc(section) \
429 . ((section->reloc_done) ? (section)->_cooked_size: (abort(),1))
432 /* These symbols are global, not specific to any BFD. Therefore, anything
433 that tries to change them is broken, and should be repaired. */
434 static const asymbol global_syms[] =
436 /* the_bfd, name, value, attr, section [, udata] */
437 {0, BFD_COM_SECTION_NAME, 0, BSF_SECTION_SYM, (asection *) &bfd_com_section},
438 {0, BFD_UND_SECTION_NAME, 0, BSF_SECTION_SYM, (asection *) &bfd_und_section},
439 {0, BFD_ABS_SECTION_NAME, 0, BSF_SECTION_SYM, (asection *) &bfd_abs_section},
440 {0, BFD_IND_SECTION_NAME, 0, BSF_SECTION_SYM, (asection *) &bfd_ind_section},
443 #define STD_SECTION(SEC, FLAGS, SYM, NAME, IDX) \
444 const asymbol * const SYM = (asymbol *) &global_syms[IDX]; \
445 const asection SEC = \
446 { NAME, 0, 0, FLAGS, 0, false, 0, 0, 0, 0, (asection *) &SEC, \
447 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (boolean) 0, \
448 (asymbol *) &global_syms[IDX], (asymbol **) &SYM, }
450 STD_SECTION (bfd_com_section, SEC_IS_COMMON, bfd_com_symbol,
451 BFD_COM_SECTION_NAME, 0);
452 STD_SECTION (bfd_und_section, 0, bfd_und_symbol, BFD_UND_SECTION_NAME, 1);
453 STD_SECTION (bfd_abs_section, 0, bfd_abs_symbol, BFD_ABS_SECTION_NAME, 2);
454 STD_SECTION (bfd_ind_section, 0, bfd_ind_symbol, BFD_IND_SECTION_NAME, 3);
460 section prototypes, , typedef asection, Sections
464 These are the functions exported by the section handling part of BFD.
469 bfd_get_section_by_name
472 asection *bfd_get_section_by_name(bfd *abfd, CONST char *name);
475 Run through @var{abfd} and return the one of the
476 <<asection>>s whose name matches @var{name}, otherwise <<NULL>>.
477 @xref{Sections}, for more information.
479 This should only be used in special cases; the normal way to process
480 all sections of a given name is to use <<bfd_map_over_sections>> and
481 <<strcmp>> on the name (or better yet, base it on the section flags
482 or something else) for each section.
486 bfd_get_section_by_name (abfd, name)
492 for (sect = abfd->sections; sect != NULL; sect = sect->next)
493 if (!strcmp (sect->name, name))
501 bfd_make_section_old_way
504 asection *bfd_make_section_old_way(bfd *abfd, CONST char *name);
507 Create a new empty section called @var{name}
508 and attach it to the end of the chain of sections for the
509 BFD @var{abfd}. An attempt to create a section with a name which
510 is already in use returns its pointer without changing the
513 It has the funny name since this is the way it used to be
514 before it was rewritten....
517 o <<bfd_error_invalid_operation>> -
518 If output has already started for this BFD.
519 o <<bfd_error_no_memory>> -
520 If obstack alloc fails.
526 bfd_make_section_old_way (abfd, name)
530 asection *sec = bfd_get_section_by_name (abfd, name);
531 if (sec == (asection *) NULL)
533 sec = bfd_make_section (abfd, name);
540 bfd_make_section_anyway
543 asection *bfd_make_section_anyway(bfd *abfd, CONST char *name);
546 Create a new empty section called @var{name} and attach it to the end of
547 the chain of sections for @var{abfd}. Create a new section even if there
548 is already a section with that name.
550 Return <<NULL>> and set <<bfd_error>> on error; possible errors are:
551 o <<bfd_error_invalid_operation>> - If output has already started for @var{abfd}.
552 o <<bfd_error_no_memory>> - If obstack alloc fails.
556 bfd_make_section_anyway (abfd, name)
561 asection **prev = &abfd->sections;
562 asection *sect = abfd->sections;
564 if (abfd->output_has_begun)
566 bfd_set_error (bfd_error_invalid_operation);
576 newsect = (asection *) bfd_zalloc (abfd, sizeof (asection));
580 newsect->name = name;
581 newsect->index = abfd->section_count++;
582 newsect->flags = SEC_NO_FLAGS;
584 newsect->userdata = NULL;
585 newsect->contents = NULL;
586 newsect->next = (asection *) NULL;
587 newsect->relocation = (arelent *) NULL;
588 newsect->reloc_count = 0;
589 newsect->line_filepos = 0;
590 newsect->owner = abfd;
592 /* Create a symbol whos only job is to point to this section. This is
593 useful for things like relocs which are relative to the base of a
595 newsect->symbol = bfd_make_empty_symbol (abfd);
596 if (newsect->symbol == NULL)
598 newsect->symbol->name = name;
599 newsect->symbol->value = 0;
600 newsect->symbol->section = newsect;
601 newsect->symbol->flags = BSF_SECTION_SYM;
603 newsect->symbol_ptr_ptr = &newsect->symbol;
605 if (BFD_SEND (abfd, _new_section_hook, (abfd, newsect)) != true)
620 asection *bfd_make_section(bfd *, CONST char *name);
623 Like <<bfd_make_section_anyway>>, but return <<NULL>> (without calling
624 bfd_set_error ()) without changing the section chain if there is already a
625 section named @var{name}. If there is an error, return <<NULL>> and set
630 bfd_make_section (abfd, name)
634 asection *sect = abfd->sections;
636 if (strcmp (name, BFD_ABS_SECTION_NAME) == 0)
638 return bfd_abs_section_ptr;
640 if (strcmp (name, BFD_COM_SECTION_NAME) == 0)
642 return bfd_com_section_ptr;
644 if (strcmp (name, BFD_UND_SECTION_NAME) == 0)
646 return bfd_und_section_ptr;
649 if (strcmp (name, BFD_IND_SECTION_NAME) == 0)
651 return bfd_ind_section_ptr;
656 if (!strcmp (sect->name, name))
661 /* The name is not already used; go ahead and make a new section. */
662 return bfd_make_section_anyway (abfd, name);
668 bfd_set_section_flags
671 boolean bfd_set_section_flags(bfd *abfd, asection *sec, flagword flags);
674 Set the attributes of the section @var{sec} in the BFD
675 @var{abfd} to the value @var{flags}. Return <<true>> on success,
676 <<false>> on error. Possible error returns are:
678 o <<bfd_error_invalid_operation>> -
679 The section cannot have one or more of the attributes
680 requested. For example, a .bss section in <<a.out>> may not
681 have the <<SEC_HAS_CONTENTS>> field set.
687 bfd_set_section_flags (abfd, section, flags)
693 /* If you try to copy a text section from an input file (where it
694 has the SEC_CODE flag set) to an output file, this loses big if
695 the bfd_applicable_section_flags (abfd) doesn't have the SEC_CODE
696 set - which it doesn't, at least not for a.out. FIXME */
698 if ((flags & bfd_applicable_section_flags (abfd)) != flags)
700 bfd_set_error (bfd_error_invalid_operation);
705 section->flags = flags;
712 bfd_map_over_sections
715 void bfd_map_over_sections(bfd *abfd,
716 void (*func)(bfd *abfd,
722 Call the provided function @var{func} for each section
723 attached to the BFD @var{abfd}, passing @var{obj} as an
724 argument. The function will be called as if by
726 | func(abfd, the_section, obj);
728 This is the prefered method for iterating over sections; an
729 alternative would be to use a loop:
732 | for (p = abfd->sections; p != NULL; p = p->next)
740 bfd_map_over_sections (abfd, operation, user_storage)
742 void (*operation) PARAMS ((bfd * abfd, asection * sect, PTR obj));
748 for (sect = abfd->sections; sect != NULL; i++, sect = sect->next)
749 (*operation) (abfd, sect, user_storage);
751 if (i != abfd->section_count) /* Debugging */
761 boolean bfd_set_section_size(bfd *abfd, asection *sec, bfd_size_type val);
764 Set @var{sec} to the size @var{val}. If the operation is
765 ok, then <<true>> is returned, else <<false>>.
767 Possible error returns:
768 o <<bfd_error_invalid_operation>> -
769 Writing has started to the BFD, so setting the size is invalid.
774 bfd_set_section_size (abfd, ptr, val)
779 /* Once you've started writing to any section you cannot create or change
780 the size of any others. */
782 if (abfd->output_has_begun)
784 bfd_set_error (bfd_error_invalid_operation);
788 ptr->_cooked_size = val;
789 ptr->_raw_size = val;
796 bfd_set_section_contents
799 boolean bfd_set_section_contents
804 bfd_size_type count);
808 Sets the contents of the section @var{section} in BFD
809 @var{abfd} to the data starting in memory at @var{data}. The
810 data is written to the output section starting at offset
811 @var{offset} for @var{count} bytes.
815 Normally <<true>> is returned, else <<false>>. Possible error
817 o <<bfd_error_no_contents>> -
818 The output section does not have the <<SEC_HAS_CONTENTS>>
819 attribute, so nothing can be written to it.
822 This routine is front end to the back end function
823 <<_bfd_set_section_contents>>.
828 #define bfd_get_section_size_now(abfd,sec) \
830 ? bfd_get_section_size_after_reloc (sec) \
831 : bfd_get_section_size_before_reloc (sec))
834 bfd_set_section_contents (abfd, section, location, offset, count)
843 if (!(bfd_get_section_flags (abfd, section) & SEC_HAS_CONTENTS))
845 bfd_set_error (bfd_error_no_contents);
852 bfd_set_error (bfd_error_bad_value);
855 sz = bfd_get_section_size_now (abfd, section);
856 if ((bfd_size_type) offset > sz
858 || offset + count > sz)
861 switch (abfd->direction)
865 bfd_set_error (bfd_error_invalid_operation);
868 case write_direction:
872 /* File is opened for update. `output_has_begun' some time ago when
873 the file was created. Do not recompute sections sizes or alignments
874 in _bfd_set_section_content. */
875 abfd->output_has_begun = true;
879 if (BFD_SEND (abfd, _bfd_set_section_contents,
880 (abfd, section, location, offset, count)))
882 abfd->output_has_begun = true;
891 bfd_get_section_contents
894 boolean bfd_get_section_contents
895 (bfd *abfd, asection *section, PTR location,
896 file_ptr offset, bfd_size_type count);
899 Read data from @var{section} in BFD @var{abfd}
900 into memory starting at @var{location}. The data is read at an
901 offset of @var{offset} from the start of the input section,
902 and is read for @var{count} bytes.
904 If the contents of a constructor with the <<SEC_CONSTRUCTOR>>
905 flag set are requested or if the section does not have the
906 <<SEC_HAS_CONTENTS>> flag set, then the @var{location} is filled
907 with zeroes. If no errors occur, <<true>> is returned, else
914 bfd_get_section_contents (abfd, section, location, offset, count)
923 if (section->flags & SEC_CONSTRUCTOR)
925 memset (location, 0, (unsigned) count);
932 bfd_set_error (bfd_error_bad_value);
935 /* Even if reloc_done is true, this function reads unrelocated
936 contents, so we want the raw size. */
937 sz = section->_raw_size;
938 if ((bfd_size_type) offset > sz || count > sz || offset + count > sz)
945 if ((section->flags & SEC_HAS_CONTENTS) == 0)
947 memset (location, 0, (unsigned) count);
951 if ((section->flags & SEC_IN_MEMORY) != 0)
953 memcpy (location, section->contents + offset, (size_t) count);
957 return BFD_SEND (abfd, _bfd_get_section_contents,
958 (abfd, section, location, offset, count));
963 bfd_copy_private_section_data
966 boolean bfd_copy_private_section_data(bfd *ibfd, asection *isec, bfd *obfd, asection *osec);
969 Copy private section information from @var{isec} in the BFD
970 @var{ibfd} to the section @var{osec} in the BFD @var{obfd}.
971 Return <<true>> on success, <<false>> on error. Possible error
974 o <<bfd_error_no_memory>> -
975 Not enough memory exists to create private data for @var{osec}.
977 .#define bfd_copy_private_section_data(ibfd, isection, obfd, osection) \
978 . BFD_SEND (ibfd, _bfd_copy_private_section_data, \
979 . (ibfd, isection, obfd, osection))