1 /* Support for the generic parts of most COFF variants, for BFD.
2 Copyright 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. */
22 Most of this hacked by Steve Chamberlain,
30 BFD supports a number of different flavours of coff format.
31 The major differences between formats are the sizes and
32 alignments of fields in structures on disk, and the occasional
35 Coff in all its varieties is implemented with a few common
36 files and a number of implementation specific files. For
37 example, The 88k bcs coff format is implemented in the file
38 @file{coff-m88k.c}. This file @code{#include}s
39 @file{coff/m88k.h} which defines the external structure of the
40 coff format for the 88k, and @file{coff/internal.h} which
41 defines the internal structure. @file{coff-m88k.c} also
42 defines the relocations used by the 88k format
45 The Intel i960 processor version of coff is implemented in
46 @file{coff-i960.c}. This file has the same structure as
47 @file{coff-m88k.c}, except that it includes @file{coff/i960.h}
48 rather than @file{coff-m88k.h}.
51 Porting to a new version of coff
53 The recommended method is to select from the existing
54 implementations the version of coff which is most like the one
55 you want to use. For example, we'll say that i386 coff is
56 the one you select, and that your coff flavour is called foo.
57 Copy @file{i386coff.c} to @file{foocoff.c}, copy
58 @file{../include/coff/i386.h} to @file{../include/coff/foo.h},
59 and add the lines to @file{targets.c} and @file{Makefile.in}
60 so that your new back end is used. Alter the shapes of the
61 structures in @file{../include/coff/foo.h} so that they match
62 what you need. You will probably also have to add
63 @code{#ifdef}s to the code in @file{coff/internal.h} and
64 @file{coffcode.h} if your version of coff is too wild.
66 You can verify that your new BFD backend works quite simply by
67 building @file{objdump} from the @file{binutils} directory,
68 and making sure that its version of what's going on and your
69 host system's idea (assuming it has the pretty standard coff
70 dump utility, usually called @code{att-dump} or just
71 @code{dump}) are the same. Then clean up your code, and send
72 what you've done to Cygnus. Then your stuff will be in the
73 next release, and you won't have to keep integrating it.
76 How the coff backend works
81 The Coff backend is split into generic routines that are
82 applicable to any Coff target and routines that are specific
83 to a particular target. The target-specific routines are
84 further split into ones which are basically the same for all
85 Coff targets except that they use the external symbol format
86 or use different values for certain constants.
88 The generic routines are in @file{coffgen.c}. These routines
89 work for any Coff target. They use some hooks into the target
90 specific code; the hooks are in a @code{bfd_coff_backend_data}
91 structure, one of which exists for each target.
93 The essentially similar target-specific routines are in
94 @file{coffcode.h}. This header file includes executable C code.
95 The various Coff targets first include the appropriate Coff
96 header file, make any special defines that are needed, and
97 then include @file{coffcode.h}.
99 Some of the Coff targets then also have additional routines in
100 the target source file itself.
102 For example, @file{coff-i960.c} includes
103 @file{coff/internal.h} and @file{coff/i960.h}. It then
104 defines a few constants, such as @code{I960}, and includes
105 @file{coffcode.h}. Since the i960 has complex relocation
106 types, @file{coff-i960.c} also includes some code to
107 manipulate the i960 relocs. This code is not in
108 @file{coffcode.h} because it would not be used by any other
114 Each flavour of coff supported in BFD has its own header file
115 describing the external layout of the structures. There is also
116 an internal description of the coff layout, in
117 @file{coff/internal.h}. A major function of the
118 coff backend is swapping the bytes and twiddling the bits to
119 translate the external form of the structures into the normal
120 internal form. This is all performed in the
121 @code{bfd_swap}_@i{thing}_@i{direction} routines. Some
122 elements are different sizes between different versions of
123 coff; it is the duty of the coff version specific include file
124 to override the definitions of various packing routines in
125 @file{coffcode.h}. E.g., the size of line number entry in coff is
126 sometimes 16 bits, and sometimes 32 bits. @code{#define}ing
127 @code{PUT_LNSZ_LNNO} and @code{GET_LNSZ_LNNO} will select the
128 correct one. No doubt, some day someone will find a version of
129 coff which has a varying field size not catered to at the
130 moment. To port BFD, that person will have to add more @code{#defines}.
131 Three of the bit twiddling routines are exported to
132 @code{gdb}; @code{coff_swap_aux_in}, @code{coff_swap_sym_in}
133 and @code{coff_swap_linno_in}. @code{GDB} reads the symbol
134 table on its own, but uses BFD to fix things up. More of the
135 bit twiddlers are exported for @code{gas};
136 @code{coff_swap_aux_out}, @code{coff_swap_sym_out},
137 @code{coff_swap_lineno_out}, @code{coff_swap_reloc_out},
138 @code{coff_swap_filehdr_out}, @code{coff_swap_aouthdr_out},
139 @code{coff_swap_scnhdr_out}. @code{Gas} currently keeps track
140 of all the symbol table and reloc drudgery itself, thereby
141 saving the internal BFD overhead, but uses BFD to swap things
142 on the way out, making cross ports much safer. Doing so also
143 allows BFD (and thus the linker) to use the same header files
144 as @code{gas}, which makes one avenue to disaster disappear.
149 The simple canonical form for symbols used by BFD is not rich
150 enough to keep all the information available in a coff symbol
151 table. The back end gets around this problem by keeping the original
152 symbol table around, "behind the scenes".
154 When a symbol table is requested (through a call to
155 @code{bfd_canonicalize_symtab}), a request gets through to
156 @code{coff_get_normalized_symtab}. This reads the symbol table from
157 the coff file and swaps all the structures inside into the
158 internal form. It also fixes up all the pointers in the table
159 (represented in the file by offsets from the first symbol in
160 the table) into physical pointers to elements in the new
161 internal table. This involves some work since the meanings of
162 fields change depending upon context: a field that is a
163 pointer to another structure in the symbol table at one moment
164 may be the size in bytes of a structure at the next. Another
165 pass is made over the table. All symbols which mark file names
166 (<<C_FILE>> symbols) are modified so that the internal
167 string points to the value in the auxent (the real filename)
168 rather than the normal text associated with the symbol
171 At this time the symbol names are moved around. Coff stores
172 all symbols less than nine characters long physically
173 within the symbol table; longer strings are kept at the end of
174 the file in the string table. This pass moves all strings
175 into memory and replaces them with pointers to the strings.
178 The symbol table is massaged once again, this time to create
179 the canonical table used by the BFD application. Each symbol
180 is inspected in turn, and a decision made (using the
181 @code{sclass} field) about the various flags to set in the
182 @code{asymbol}. @xref{Symbols}. The generated canonical table
183 shares strings with the hidden internal symbol table.
185 Any linenumbers are read from the coff file too, and attached
186 to the symbols which own the functions the linenumbers belong to.
191 Writing a symbol to a coff file which didn't come from a coff
192 file will lose any debugging information. The @code{asymbol}
193 structure remembers the BFD from which the symbol was taken, and on
194 output the back end makes sure that the same destination target as
195 source target is present.
197 When the symbols have come from a coff file then all the
198 debugging information is preserved.
200 Symbol tables are provided for writing to the back end in a
201 vector of pointers to pointers. This allows applications like
202 the linker to accumulate and output large symbol tables
203 without having to do too much byte copying.
205 This function runs through the provided symbol table and
206 patches each symbol marked as a file place holder
207 (@code{C_FILE}) to point to the next file place holder in the
208 list. It also marks each @code{offset} field in the list with
209 the offset from the first symbol of the current symbol.
211 Another function of this procedure is to turn the canonical
212 value form of BFD into the form used by coff. Internally, BFD
213 expects symbol values to be offsets from a section base; so a
214 symbol physically at 0x120, but in a section starting at
215 0x100, would have the value 0x20. Coff expects symbols to
216 contain their final value, so symbols have their values
217 changed at this point to reflect their sum with their owning
218 section. This transformation uses the
219 <<output_section>> field of the @code{asymbol}'s
220 @code{asection} @xref{Sections}.
222 o <<coff_mangle_symbols>>
224 This routine runs though the provided symbol table and uses
225 the offsets generated by the previous pass and the pointers
226 generated when the symbol table was read in to create the
227 structured hierachy required by coff. It changes each pointer
228 to a symbol into the index into the symbol table of the asymbol.
230 o <<coff_write_symbols>>
232 This routine runs through the symbol table and patches up the
233 symbols from their internal form into the coff way, calls the
234 bit twiddlers, and writes out the table to the file.
243 The hidden information for an <<asymbol>> is described in a
244 <<combined_entry_type>>:
248 .typedef struct coff_ptr_struct
251 . {* Remembers the offset from the first symbol in the file for
252 . this symbol. Generated by coff_renumber_symbols. *}
253 .unsigned int offset;
255 . {* Should the value of this symbol be renumbered. Used for
256 . XCOFF C_BSTAT symbols. Set by coff_slurp_symbol_table. *}
257 .unsigned int fix_value : 1;
259 . {* Should the tag field of this symbol be renumbered.
260 . Created by coff_pointerize_aux. *}
261 .unsigned int fix_tag : 1;
263 . {* Should the endidx field of this symbol be renumbered.
264 . Created by coff_pointerize_aux. *}
265 .unsigned int fix_end : 1;
267 . {* Should the x_csect.x_scnlen field be renumbered.
268 . Created by coff_pointerize_aux. *}
269 .unsigned int fix_scnlen : 1;
271 . {* Fix up an XCOFF C_BINCL/C_EINCL symbol. The value is the
272 . index into the line number entries. Set by
273 . coff_slurp_symbol_table. *}
274 .unsigned int fix_line : 1;
276 . {* The container for the symbol structure as read and translated
280 . union internal_auxent auxent;
281 . struct internal_syment syment;
283 .} combined_entry_type;
286 .{* Each canonical asymbol really looks like this: *}
288 .typedef struct coff_symbol_struct
290 . {* The actual symbol which the rest of BFD works with *}
293 . {* A pointer to the hidden information for this symbol *}
294 .combined_entry_type *native;
296 . {* A pointer to the linenumber information for this symbol *}
297 .struct lineno_cache_entry *lineno;
299 . {* Have the line numbers been relocated yet ? *}
300 .boolean done_lineno;
309 #include "coffswap.h"
313 /* void warning(); */
316 * Return a word with STYP_* (scnhdr.s_flags) flags set to represent the
317 * incoming SEC_* flags. The inverse of this function is styp_to_sec_flags().
318 * NOTE: If you add to/change this routine, you should mirror the changes
319 * in styp_to_sec_flags().
322 sec_to_styp_flags (sec_name, sec_flags)
323 CONST char *sec_name;
328 if (!strcmp (sec_name, _TEXT))
330 styp_flags = STYP_TEXT;
332 else if (!strcmp (sec_name, _DATA))
334 styp_flags = STYP_DATA;
336 else if (!strcmp (sec_name, _BSS))
338 styp_flags = STYP_BSS;
341 else if (!strcmp (sec_name, _COMMENT))
343 styp_flags = STYP_INFO;
344 #endif /* _COMMENT */
347 else if (!strcmp (sec_name, _LIB))
349 styp_flags = STYP_LIB;
353 else if (!strcmp (sec_name, _LIT))
355 styp_flags = STYP_LIT;
358 else if (!strcmp (sec_name, ".debug"))
361 styp_flags = STYP_DEBUG;
363 styp_flags = STYP_INFO;
366 else if (!strncmp (sec_name, ".stab", 5))
368 styp_flags = STYP_INFO;
371 else if (!strcmp (sec_name, ".edata"))
373 styp_flags = STYP_DATA;
377 else if (!strcmp (sec_name, _PAD))
379 styp_flags = STYP_PAD;
381 else if (!strcmp (sec_name, _LOADER))
383 styp_flags = STYP_LOADER;
386 /* Try and figure out what it should be */
387 else if (sec_flags & SEC_CODE)
389 styp_flags = STYP_TEXT;
391 else if (sec_flags & SEC_DATA)
393 styp_flags = STYP_DATA;
395 else if (sec_flags & SEC_READONLY)
397 #ifdef STYP_LIT /* 29k readonly text/data section */
398 styp_flags = STYP_LIT;
400 styp_flags = STYP_TEXT;
401 #endif /* STYP_LIT */
403 else if (sec_flags & SEC_LOAD)
405 styp_flags = STYP_TEXT;
407 else if (sec_flags & SEC_ALLOC)
409 styp_flags = STYP_BSS;
413 if ((sec_flags & (SEC_NEVER_LOAD | SEC_COFF_SHARED_LIBRARY)) != 0)
414 styp_flags |= STYP_NOLOAD;
420 * Return a word with SEC_* flags set to represent the incoming
421 * STYP_* flags (from scnhdr.s_flags). The inverse of this
422 * function is sec_to_styp_flags().
423 * NOTE: If you add to/change this routine, you should mirror the changes
424 * in sec_to_styp_flags().
427 styp_to_sec_flags (abfd, hdr, name)
432 struct internal_scnhdr *internal_s = (struct internal_scnhdr *) hdr;
433 long styp_flags = internal_s->s_flags;
434 flagword sec_flags = 0;
437 if (styp_flags & STYP_NOLOAD)
439 sec_flags |= SEC_NEVER_LOAD;
441 #endif /* STYP_NOLOAD */
443 /* For 386 COFF, at least, an unloadable text or data section is
444 actually a shared library section. */
445 if (styp_flags & STYP_TEXT)
447 if (sec_flags & SEC_NEVER_LOAD)
448 sec_flags |= SEC_CODE | SEC_COFF_SHARED_LIBRARY;
450 sec_flags |= SEC_CODE | SEC_LOAD | SEC_ALLOC;
452 else if (styp_flags & STYP_DATA)
454 if (sec_flags & SEC_NEVER_LOAD)
455 sec_flags |= SEC_DATA | SEC_COFF_SHARED_LIBRARY;
457 sec_flags |= SEC_DATA | SEC_LOAD | SEC_ALLOC;
459 else if (styp_flags & STYP_BSS)
461 #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
462 if (sec_flags & SEC_NEVER_LOAD)
463 sec_flags |= SEC_ALLOC | SEC_COFF_SHARED_LIBRARY;
466 sec_flags |= SEC_ALLOC;
468 else if (styp_flags & STYP_INFO)
470 /* We mark these as SEC_DEBUGGING, but only if COFF_PAGE_SIZE is
471 defined. coff_compute_section_file_positions uses
472 COFF_PAGE_SIZE to ensure that the low order bits of the
473 section VMA and the file offset match. If we don't know
474 COFF_PAGE_SIZE, we can't ensure the correct correspondence,
475 and demand page loading of the file will fail. */
476 #ifdef COFF_PAGE_SIZE
477 sec_flags |= SEC_DEBUGGING;
480 else if (styp_flags & STYP_PAD)
484 else if (strcmp (name, _TEXT) == 0)
486 if (sec_flags & SEC_NEVER_LOAD)
487 sec_flags |= SEC_CODE | SEC_COFF_SHARED_LIBRARY;
489 sec_flags |= SEC_CODE | SEC_LOAD | SEC_ALLOC;
491 else if (strcmp (name, _DATA) == 0)
493 if (sec_flags & SEC_NEVER_LOAD)
494 sec_flags |= SEC_DATA | SEC_COFF_SHARED_LIBRARY;
496 sec_flags |= SEC_DATA | SEC_LOAD | SEC_ALLOC;
498 else if (strcmp (name, _BSS) == 0)
500 #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
501 if (sec_flags & SEC_NEVER_LOAD)
502 sec_flags |= SEC_ALLOC | SEC_COFF_SHARED_LIBRARY;
505 sec_flags |= SEC_ALLOC;
507 else if (strcmp (name, ".debug") == 0
509 || strcmp (name, _COMMENT) == 0
511 || strncmp (name, ".stab", 5) == 0)
513 #ifdef COFF_PAGE_SIZE
514 sec_flags |= SEC_DEBUGGING;
518 else if (strcmp (name, _LIB) == 0)
522 else if (strcmp (name, _LIT) == 0)
524 sec_flags = SEC_LOAD | SEC_ALLOC | SEC_READONLY;
529 sec_flags |= SEC_ALLOC | SEC_LOAD;
532 #ifdef STYP_LIT /* A29k readonly text/data section type */
533 if ((styp_flags & STYP_LIT) == STYP_LIT)
535 sec_flags = (SEC_LOAD | SEC_ALLOC | SEC_READONLY);
537 #endif /* STYP_LIT */
538 #ifdef STYP_OTHER_LOAD /* Other loaded sections */
539 if (styp_flags & STYP_OTHER_LOAD)
541 sec_flags = (SEC_LOAD | SEC_ALLOC);
543 #endif /* STYP_SDATA */
548 #define get_index(symbol) ((symbol)->udata.i)
552 bfd_coff_backend_data
556 Special entry points for gdb to swap in coff symbol table parts:
559 . void (*_bfd_coff_swap_aux_in) PARAMS ((
568 . void (*_bfd_coff_swap_sym_in) PARAMS ((
573 . void (*_bfd_coff_swap_lineno_in) PARAMS ((
579 Special entry points for gas to swap out coff parts:
581 . unsigned int (*_bfd_coff_swap_aux_out) PARAMS ((
590 . unsigned int (*_bfd_coff_swap_sym_out) PARAMS ((
595 . unsigned int (*_bfd_coff_swap_lineno_out) PARAMS ((
600 . unsigned int (*_bfd_coff_swap_reloc_out) PARAMS ((
605 . unsigned int (*_bfd_coff_swap_filehdr_out) PARAMS ((
610 . unsigned int (*_bfd_coff_swap_aouthdr_out) PARAMS ((
615 . unsigned int (*_bfd_coff_swap_scnhdr_out) PARAMS ((
621 Special entry points for generic COFF routines to call target
622 dependent COFF routines:
624 . unsigned int _bfd_filhsz;
625 . unsigned int _bfd_aoutsz;
626 . unsigned int _bfd_scnhsz;
627 . unsigned int _bfd_symesz;
628 . unsigned int _bfd_auxesz;
629 . unsigned int _bfd_relsz;
630 . unsigned int _bfd_linesz;
631 . boolean _bfd_coff_long_filenames;
632 . void (*_bfd_coff_swap_filehdr_in) PARAMS ((
636 . void (*_bfd_coff_swap_aouthdr_in) PARAMS ((
640 . void (*_bfd_coff_swap_scnhdr_in) PARAMS ((
644 . void (*_bfd_coff_swap_reloc_in) PARAMS ((
648 . boolean (*_bfd_coff_bad_format_hook) PARAMS ((
650 . PTR internal_filehdr));
651 . boolean (*_bfd_coff_set_arch_mach_hook) PARAMS ((
653 . PTR internal_filehdr));
654 . PTR (*_bfd_coff_mkobject_hook) PARAMS ((
656 . PTR internal_filehdr,
657 . PTR internal_aouthdr));
658 . flagword (*_bfd_styp_to_sec_flags_hook) PARAMS ((
660 . PTR internal_scnhdr,
661 . const char *name));
662 . void (*_bfd_set_alignment_hook) PARAMS ((
665 . PTR internal_scnhdr));
666 . boolean (*_bfd_coff_slurp_symbol_table) PARAMS ((
668 . boolean (*_bfd_coff_symname_in_debug) PARAMS ((
670 . struct internal_syment *sym));
671 . boolean (*_bfd_coff_pointerize_aux_hook) PARAMS ((
673 . combined_entry_type *table_base,
674 . combined_entry_type *symbol,
675 . unsigned int indaux,
676 . combined_entry_type *aux));
677 . boolean (*_bfd_coff_print_aux) PARAMS ((
680 . combined_entry_type *table_base,
681 . combined_entry_type *symbol,
682 . combined_entry_type *aux,
683 . unsigned int indaux));
684 . void (*_bfd_coff_reloc16_extra_cases) PARAMS ((
686 . struct bfd_link_info *link_info,
687 . struct bfd_link_order *link_order,
690 . unsigned int *src_ptr,
691 . unsigned int *dst_ptr));
692 . int (*_bfd_coff_reloc16_estimate) PARAMS ((
694 . asection *input_section,
696 . unsigned int shrink,
697 . struct bfd_link_info *link_info));
698 . boolean (*_bfd_coff_sym_is_global) PARAMS ((
700 . struct internal_syment *));
701 . void (*_bfd_coff_compute_section_file_positions) PARAMS ((
703 . boolean (*_bfd_coff_start_final_link) PARAMS ((
705 . struct bfd_link_info *info));
706 . boolean (*_bfd_coff_relocate_section) PARAMS ((
708 . struct bfd_link_info *info,
710 . asection *input_section,
711 . bfd_byte *contents,
712 . struct internal_reloc *relocs,
713 . struct internal_syment *syms,
714 . asection **sections));
715 . reloc_howto_type *(*_bfd_coff_rtype_to_howto) PARAMS ((
718 . struct internal_reloc *rel,
719 . struct coff_link_hash_entry *h,
720 . struct internal_syment *sym,
721 . bfd_vma *addendp));
722 . boolean (*_bfd_coff_adjust_symndx) PARAMS ((
724 . struct bfd_link_info *info,
727 . struct internal_reloc *reloc,
728 . boolean *adjustedp));
730 .} bfd_coff_backend_data;
732 .#define coff_backend_info(abfd) ((bfd_coff_backend_data *) (abfd)->xvec->backend_data)
734 .#define bfd_coff_swap_aux_in(a,e,t,c,ind,num,i) \
735 . ((coff_backend_info (a)->_bfd_coff_swap_aux_in) (a,e,t,c,ind,num,i))
737 .#define bfd_coff_swap_sym_in(a,e,i) \
738 . ((coff_backend_info (a)->_bfd_coff_swap_sym_in) (a,e,i))
740 .#define bfd_coff_swap_lineno_in(a,e,i) \
741 . ((coff_backend_info ( a)->_bfd_coff_swap_lineno_in) (a,e,i))
743 .#define bfd_coff_swap_reloc_out(abfd, i, o) \
744 . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_out) (abfd, i, o))
746 .#define bfd_coff_swap_lineno_out(abfd, i, o) \
747 . ((coff_backend_info (abfd)->_bfd_coff_swap_lineno_out) (abfd, i, o))
749 .#define bfd_coff_swap_aux_out(a,i,t,c,ind,num,o) \
750 . ((coff_backend_info (a)->_bfd_coff_swap_aux_out) (a,i,t,c,ind,num,o))
752 .#define bfd_coff_swap_sym_out(abfd, i,o) \
753 . ((coff_backend_info (abfd)->_bfd_coff_swap_sym_out) (abfd, i, o))
755 .#define bfd_coff_swap_scnhdr_out(abfd, i,o) \
756 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_out) (abfd, i, o))
758 .#define bfd_coff_swap_filehdr_out(abfd, i,o) \
759 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_out) (abfd, i, o))
761 .#define bfd_coff_swap_aouthdr_out(abfd, i,o) \
762 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_out) (abfd, i, o))
764 .#define bfd_coff_filhsz(abfd) (coff_backend_info (abfd)->_bfd_filhsz)
765 .#define bfd_coff_aoutsz(abfd) (coff_backend_info (abfd)->_bfd_aoutsz)
766 .#define bfd_coff_scnhsz(abfd) (coff_backend_info (abfd)->_bfd_scnhsz)
767 .#define bfd_coff_symesz(abfd) (coff_backend_info (abfd)->_bfd_symesz)
768 .#define bfd_coff_auxesz(abfd) (coff_backend_info (abfd)->_bfd_auxesz)
769 .#define bfd_coff_relsz(abfd) (coff_backend_info (abfd)->_bfd_relsz)
770 .#define bfd_coff_linesz(abfd) (coff_backend_info (abfd)->_bfd_linesz)
771 .#define bfd_coff_long_filenames(abfd) (coff_backend_info (abfd)->_bfd_coff_long_filenames)
772 .#define bfd_coff_swap_filehdr_in(abfd, i,o) \
773 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_in) (abfd, i, o))
775 .#define bfd_coff_swap_aouthdr_in(abfd, i,o) \
776 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_in) (abfd, i, o))
778 .#define bfd_coff_swap_scnhdr_in(abfd, i,o) \
779 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_in) (abfd, i, o))
781 .#define bfd_coff_swap_reloc_in(abfd, i, o) \
782 . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_in) (abfd, i, o))
784 .#define bfd_coff_bad_format_hook(abfd, filehdr) \
785 . ((coff_backend_info (abfd)->_bfd_coff_bad_format_hook) (abfd, filehdr))
787 .#define bfd_coff_set_arch_mach_hook(abfd, filehdr)\
788 . ((coff_backend_info (abfd)->_bfd_coff_set_arch_mach_hook) (abfd, filehdr))
789 .#define bfd_coff_mkobject_hook(abfd, filehdr, aouthdr)\
790 . ((coff_backend_info (abfd)->_bfd_coff_mkobject_hook) (abfd, filehdr, aouthdr))
792 .#define bfd_coff_styp_to_sec_flags_hook(abfd, scnhdr, name)\
793 . ((coff_backend_info (abfd)->_bfd_styp_to_sec_flags_hook) (abfd, scnhdr, name))
795 .#define bfd_coff_set_alignment_hook(abfd, sec, scnhdr)\
796 . ((coff_backend_info (abfd)->_bfd_set_alignment_hook) (abfd, sec, scnhdr))
798 .#define bfd_coff_slurp_symbol_table(abfd)\
799 . ((coff_backend_info (abfd)->_bfd_coff_slurp_symbol_table) (abfd))
801 .#define bfd_coff_symname_in_debug(abfd, sym)\
802 . ((coff_backend_info (abfd)->_bfd_coff_symname_in_debug) (abfd, sym))
804 .#define bfd_coff_print_aux(abfd, file, base, symbol, aux, indaux)\
805 . ((coff_backend_info (abfd)->_bfd_coff_print_aux)\
806 . (abfd, file, base, symbol, aux, indaux))
808 .#define bfd_coff_reloc16_extra_cases(abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr)\
809 . ((coff_backend_info (abfd)->_bfd_coff_reloc16_extra_cases)\
810 . (abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr))
812 .#define bfd_coff_reloc16_estimate(abfd, section, reloc, shrink, link_info)\
813 . ((coff_backend_info (abfd)->_bfd_coff_reloc16_estimate)\
814 . (abfd, section, reloc, shrink, link_info))
816 .#define bfd_coff_sym_is_global(abfd, sym)\
817 . ((coff_backend_info (abfd)->_bfd_coff_sym_is_global)\
820 .#define bfd_coff_compute_section_file_positions(abfd)\
821 . ((coff_backend_info (abfd)->_bfd_coff_compute_section_file_positions)\
824 .#define bfd_coff_start_final_link(obfd, info)\
825 . ((coff_backend_info (obfd)->_bfd_coff_start_final_link)\
827 .#define bfd_coff_relocate_section(obfd,info,ibfd,o,con,rel,isyms,secs)\
828 . ((coff_backend_info (ibfd)->_bfd_coff_relocate_section)\
829 . (obfd, info, ibfd, o, con, rel, isyms, secs))
830 .#define bfd_coff_rtype_to_howto(abfd, sec, rel, h, sym, addendp)\
831 . ((coff_backend_info (abfd)->_bfd_coff_rtype_to_howto)\
832 . (abfd, sec, rel, h, sym, addendp))
833 .#define bfd_coff_adjust_symndx(obfd, info, ibfd, sec, rel, adjustedp)\
834 . ((coff_backend_info (abfd)->_bfd_coff_adjust_symndx)\
835 . (obfd, info, ibfd, sec, rel, adjustedp))
839 /* See whether the magic number matches. */
842 coff_bad_format_hook (abfd, filehdr)
846 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
848 if (BADMAG (*internal_f))
851 /* if the optional header is NULL or not the correct size then
852 quit; the only difference I can see between m88k dgux headers (MC88DMAGIC)
853 and Intel 960 readwrite headers (I960WRMAGIC) is that the
854 optional header is of a different size.
856 But the mips keeps extra stuff in it's opthdr, so dont check
860 #if defined(M88) || defined(I960)
861 if (internal_f->f_opthdr != 0 && AOUTSZ != internal_f->f_opthdr)
869 initialize a section structure with information peculiar to this
870 particular implementation of coff
874 coff_new_section_hook (abfd, section)
878 section->alignment_power = COFF_DEFAULT_SECTION_ALIGNMENT_POWER;
881 if (xcoff_data (abfd)->text_align_power != 0
882 && strcmp (bfd_get_section_name (abfd, section), ".text") == 0)
883 section->alignment_power = xcoff_data (abfd)->text_align_power;
884 if (xcoff_data (abfd)->data_align_power != 0
885 && strcmp (bfd_get_section_name (abfd, section), ".data") == 0)
886 section->alignment_power = xcoff_data (abfd)->data_align_power;
889 /* Allocate aux records for section symbols, to store size and
892 @@ Shouldn't use constant multiplier here! */
893 coffsymbol (section->symbol)->native =
894 (combined_entry_type *) bfd_zalloc (abfd,
895 sizeof (combined_entry_type) * 10);
897 /* The .stab section must be aligned to 2**2 at most, because
898 otherwise there may be gaps in the section which gdb will not
899 know how to interpret. Examining the section name is a hack, but
900 that is also how gdb locates the section.
901 We need to handle the .ctors and .dtors sections similarly, to
902 avoid introducing null words in the tables. */
903 if (COFF_DEFAULT_SECTION_ALIGNMENT_POWER > 2
904 && (strncmp (section->name, ".stab", 5) == 0
905 || strcmp (section->name, ".ctors") == 0
906 || strcmp (section->name, ".dtors") == 0))
907 section->alignment_power = 2;
914 /* Set the alignment of a BFD section. */
917 coff_set_alignment_hook (abfd, section, scnhdr)
922 struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr;
925 for (i = 0; i < 32; i++)
926 if ((1 << i) >= hdr->s_align)
928 section->alignment_power = i;
934 /* a couple of macros to help setting the alignment power field */
935 #define ALIGN_SET(field,x,y) \
936 if (((field) & IMAGE_SCN_ALIGN_64BYTES) == x )\
938 section->alignment_power = y;\
941 #define ELIFALIGN_SET(field,x,y) \
942 else if (( (field) & IMAGE_SCN_ALIGN_64BYTES) == x ) \
944 section->alignment_power = y;\
948 coff_set_alignment_hook (abfd, section, scnhdr)
953 struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr;
955 ALIGN_SET (hdr->s_flags, IMAGE_SCN_ALIGN_64BYTES, 6)
956 ELIFALIGN_SET (hdr->s_flags, IMAGE_SCN_ALIGN_32BYTES, 5)
957 ELIFALIGN_SET (hdr->s_flags, IMAGE_SCN_ALIGN_16BYTES, 4)
958 ELIFALIGN_SET (hdr->s_flags, IMAGE_SCN_ALIGN_8BYTES, 3)
959 ELIFALIGN_SET (hdr->s_flags, IMAGE_SCN_ALIGN_4BYTES, 2)
960 ELIFALIGN_SET (hdr->s_flags, IMAGE_SCN_ALIGN_2BYTES, 1)
961 ELIFALIGN_SET (hdr->s_flags, IMAGE_SCN_ALIGN_1BYTES, 0)
964 if (strcmp (section->name, ".idata$2") == 0)
966 section->alignment_power = 0;
968 else if (strcmp (section->name, ".idata$3") == 0)
970 section->alignment_power = 0;
972 else if (strcmp (section->name, ".idata$4") == 0)
974 section->alignment_power = 2;
976 else if (strcmp (section->name, ".idata$5") == 0)
978 section->alignment_power = 2;
980 else if (strcmp (section->name, ".idata$6") == 0)
982 section->alignment_power = 1;
984 else if (strcmp (section->name, ".reloc") == 0)
986 section->alignment_power = 1;
993 #else /* ! COFF_WITH_PE */
996 /* We grossly abuse this function to handle XCOFF overflow headers.
997 When we see one, we correct the reloc and line number counts in the
998 real header, and remove the section we just created. */
1001 coff_set_alignment_hook (abfd, section, scnhdr)
1006 struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr;
1010 if ((hdr->s_flags & STYP_OVRFLO) == 0)
1013 real_sec = coff_section_from_bfd_index (abfd, hdr->s_nreloc);
1014 if (real_sec == NULL)
1017 real_sec->reloc_count = hdr->s_paddr;
1018 real_sec->lineno_count = hdr->s_vaddr;
1020 for (ps = &abfd->sections; *ps != NULL; ps = &(*ps)->next)
1025 --abfd->section_count;
1031 #else /* ! RS6000COFF_C */
1033 #define coff_set_alignment_hook \
1034 ((void (*) PARAMS ((bfd *, asection *, PTR))) bfd_void)
1036 #endif /* ! RS6000COFF_C */
1037 #endif /* ! COFF_WITH_PE */
1040 #ifndef coff_mkobject
1042 coff_mkobject (abfd)
1045 coff_data_type *coff;
1047 abfd->tdata.coff_obj_data = (struct coff_tdata *) bfd_zalloc (abfd, sizeof (coff_data_type));
1048 if (abfd->tdata.coff_obj_data == 0)
1050 coff = coff_data (abfd);
1051 coff->symbols = (coff_symbol_type *) NULL;
1052 coff->conversion_table = (unsigned int *) NULL;
1053 coff->raw_syments = (struct coff_ptr_struct *) NULL;
1054 coff->relocbase = 0;
1055 coff->local_toc_sym_map = 0;
1057 /* make_abs_section(abfd);*/
1063 /* Create the COFF backend specific information. */
1064 #ifndef coff_mkobject_hook
1066 coff_mkobject_hook (abfd, filehdr, aouthdr)
1071 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
1072 coff_data_type *coff;
1074 if (coff_mkobject (abfd) == false)
1077 coff = coff_data (abfd);
1079 coff->sym_filepos = internal_f->f_symptr;
1081 /* These members communicate important constants about the symbol
1082 table to GDB's symbol-reading code. These `constants'
1083 unfortunately vary among coff implementations... */
1084 coff->local_n_btmask = N_BTMASK;
1085 coff->local_n_btshft = N_BTSHFT;
1086 coff->local_n_tmask = N_TMASK;
1087 coff->local_n_tshift = N_TSHIFT;
1088 coff->local_symesz = SYMESZ;
1089 coff->local_auxesz = AUXESZ;
1090 coff->local_linesz = LINESZ;
1092 obj_raw_syment_count (abfd) =
1093 obj_conv_table_size (abfd) =
1094 internal_f->f_nsyms;
1097 if ((internal_f->f_flags & F_SHROBJ) != 0)
1098 abfd->flags |= DYNAMIC;
1099 if (aouthdr != NULL && internal_f->f_opthdr >= AOUTSZ)
1101 struct internal_aouthdr *internal_a =
1102 (struct internal_aouthdr *) aouthdr;
1103 struct xcoff_tdata *xcoff;
1105 xcoff = xcoff_data (abfd);
1106 xcoff->full_aouthdr = true;
1107 xcoff->toc = internal_a->o_toc;
1108 if (internal_a->o_sntoc == 0)
1109 xcoff->toc_section = NULL;
1111 xcoff->toc_section =
1112 coff_section_from_bfd_index (abfd, internal_a->o_sntoc);
1113 if (internal_a->o_snentry == 0)
1114 xcoff->entry_section = NULL;
1116 xcoff->entry_section =
1117 coff_section_from_bfd_index (abfd, internal_a->o_snentry);
1118 xcoff->text_align_power = internal_a->o_algntext;
1119 xcoff->data_align_power = internal_a->o_algndata;
1120 xcoff->modtype = internal_a->o_modtype;
1121 xcoff->cputype = internal_a->o_cputype;
1122 xcoff->maxdata = internal_a->o_maxdata;
1123 xcoff->maxstack = internal_a->o_maxstack;
1131 /* Determine the machine architecture and type. FIXME: This is target
1132 dependent because the magic numbers are defined in the target
1133 dependent header files. But there is no particular need for this.
1134 If the magic numbers were moved to a separate file, this function
1135 would be target independent and would also be much more successful
1136 at linking together COFF files for different architectures. */
1139 coff_set_arch_mach_hook (abfd, filehdr)
1144 enum bfd_architecture arch;
1145 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
1148 switch (internal_f->f_magic)
1152 arch = bfd_arch_powerpc;
1153 machine = 0; /* what does this mean? (krk) */
1159 case I386AIXMAGIC: /* Danbury PS/2 AIX C Compiler */
1160 case LYNXCOFFMAGIC: /* shadows the m68k Lynx number below, sigh */
1161 arch = bfd_arch_i386;
1165 #ifdef A29K_MAGIC_BIG
1166 case A29K_MAGIC_BIG:
1167 case A29K_MAGIC_LITTLE:
1168 arch = bfd_arch_a29k;
1174 arch = bfd_arch_arm;
1181 #ifdef MC68KBCSMAGIC
1184 #ifdef APOLLOM68KMAGIC
1185 case APOLLOM68KMAGIC:
1187 #ifdef LYNXCOFFMAGIC
1190 arch = bfd_arch_m68k;
1198 arch = bfd_arch_m88k;
1204 arch = bfd_arch_z8k;
1205 switch (internal_f->f_flags & F_MACHMASK)
1208 machine = bfd_mach_z8001;
1211 machine = bfd_mach_z8002;
1220 arch = bfd_arch_i860;
1227 arch = bfd_arch_i960;
1228 switch (F_I960TYPE & internal_f->f_flags)
1232 machine = bfd_mach_i960_core;
1235 machine = bfd_mach_i960_kb_sb;
1238 machine = bfd_mach_i960_mc;
1241 machine = bfd_mach_i960_xa;
1244 machine = bfd_mach_i960_ca;
1247 machine = bfd_mach_i960_ka_sa;
1249 /* start-sanitize-i960xl */
1251 machine = bfd_mach_i960_xl;
1253 /* end-sanitize-i960xl */
1266 if (xcoff_data (abfd)->cputype != -1)
1267 cputype = xcoff_data (abfd)->cputype & 0xff;
1270 /* We did not get a value from the a.out header. If the
1271 file has not been stripped, we may be able to get the
1272 architecture information from the first symbol, if it
1273 is a .file symbol. */
1274 if (obj_raw_syment_count (abfd) == 0)
1278 bfd_byte buf[SYMESZ];
1279 struct internal_syment sym;
1281 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0
1282 || bfd_read (buf, 1, SYMESZ, abfd) != SYMESZ)
1284 coff_swap_sym_in (abfd, (PTR) buf, (PTR) &sym);
1285 if (sym.n_sclass == C_FILE)
1286 cputype = sym.n_type & 0xff;
1292 /* FIXME: We don't handle all cases here. */
1298 /* PowerPC Macs use the same magic numbers as RS/6000
1299 (because that's how they were bootstrapped originally),
1300 but they are always PowerPC architecture. */
1301 arch = bfd_arch_powerpc;
1304 arch = bfd_arch_rs6000;
1306 #endif /* POWERMAC */
1310 arch = bfd_arch_powerpc;
1313 case 2: /* 64 bit PowerPC */
1314 arch = bfd_arch_powerpc;
1318 arch = bfd_arch_powerpc;
1322 arch = bfd_arch_rs6000;
1332 arch = bfd_arch_we32k;
1339 arch = bfd_arch_h8300;
1340 machine = bfd_mach_h8300;
1341 /* !! FIXME this probably isn't the right place for this */
1342 abfd->flags |= BFD_IS_RELAXABLE;
1348 arch = bfd_arch_h8300;
1349 machine = bfd_mach_h8300h;
1350 /* !! FIXME this probably isn't the right place for this */
1351 abfd->flags |= BFD_IS_RELAXABLE;
1355 #ifdef SH_ARCH_MAGIC_BIG
1356 case SH_ARCH_MAGIC_BIG:
1357 case SH_ARCH_MAGIC_LITTLE:
1365 arch = bfd_arch_h8500;
1372 #ifdef LYNXCOFFMAGIC
1375 arch = bfd_arch_sparc;
1380 default: /* Unreadable input file type */
1381 arch = bfd_arch_obscure;
1385 bfd_default_set_arch_mach (abfd, arch, machine);
1389 #ifdef SYMNAME_IN_DEBUG
1392 symname_in_debug_hook (abfd, sym)
1394 struct internal_syment *sym;
1396 return SYMNAME_IN_DEBUG (sym) ? true : false;
1401 #define symname_in_debug_hook \
1402 (boolean (*) PARAMS ((bfd *, struct internal_syment *))) bfd_false
1408 /* Handle the csect auxent of a C_EXT or C_HIDEXT symbol. */
1410 static boolean coff_pointerize_aux_hook
1411 PARAMS ((bfd *, combined_entry_type *, combined_entry_type *,
1412 unsigned int, combined_entry_type *));
1416 coff_pointerize_aux_hook (abfd, table_base, symbol, indaux, aux)
1418 combined_entry_type *table_base;
1419 combined_entry_type *symbol;
1420 unsigned int indaux;
1421 combined_entry_type *aux;
1423 int class = symbol->u.syment.n_sclass;
1425 if ((class == C_EXT || class == C_HIDEXT)
1426 && indaux + 1 == symbol->u.syment.n_numaux)
1428 if (SMTYP_SMTYP (aux->u.auxent.x_csect.x_smtyp) == XTY_LD)
1430 aux->u.auxent.x_csect.x_scnlen.p =
1431 table_base + aux->u.auxent.x_csect.x_scnlen.l;
1432 aux->fix_scnlen = 1;
1435 /* Return true to indicate that the caller should not do any
1436 further work on this auxent. */
1440 /* Return false to indicate that this auxent should be handled by
1448 /* We don't want to pointerize bal entries. */
1450 static boolean coff_pointerize_aux_hook
1451 PARAMS ((bfd *, combined_entry_type *, combined_entry_type *,
1452 unsigned int, combined_entry_type *));
1456 coff_pointerize_aux_hook (abfd, table_base, symbol, indaux, aux)
1458 combined_entry_type *table_base;
1459 combined_entry_type *symbol;
1460 unsigned int indaux;
1461 combined_entry_type *aux;
1463 /* Return true if we don't want to pointerize this aux entry, which
1464 is the case for the lastfirst aux entry for a C_LEAFPROC symbol. */
1466 && (symbol->u.syment.n_sclass == C_LEAFPROC
1467 || symbol->u.syment.n_sclass == C_LEAFSTAT
1468 || symbol->u.syment.n_sclass == C_LEAFEXT));
1473 #define coff_pointerize_aux_hook 0
1476 #endif /* ! RS6000COFF_C */
1478 /* Print an aux entry. This returns true if it has printed it. */
1480 static boolean coff_print_aux
1481 PARAMS ((bfd *, FILE *, combined_entry_type *, combined_entry_type *,
1482 combined_entry_type *, unsigned int));
1485 coff_print_aux (abfd, file, table_base, symbol, aux, indaux)
1488 combined_entry_type *table_base;
1489 combined_entry_type *symbol;
1490 combined_entry_type *aux;
1491 unsigned int indaux;
1494 if ((symbol->u.syment.n_sclass == C_EXT
1495 || symbol->u.syment.n_sclass == C_HIDEXT)
1496 && indaux + 1 == symbol->u.syment.n_numaux)
1498 /* This is a csect entry. */
1499 fprintf (file, "AUX ");
1500 if (SMTYP_SMTYP (aux->u.auxent.x_csect.x_smtyp) != XTY_LD)
1502 BFD_ASSERT (! aux->fix_scnlen);
1503 fprintf (file, "val %5ld", aux->u.auxent.x_csect.x_scnlen.l);
1507 fprintf (file, "indx ");
1508 if (! aux->fix_scnlen)
1509 fprintf (file, "%4ld", aux->u.auxent.x_csect.x_scnlen.l);
1511 fprintf (file, "%4ld",
1512 (long) (aux->u.auxent.x_csect.x_scnlen.p - table_base));
1515 " prmhsh %ld snhsh %u typ %d algn %d clss %u stb %ld snstb %u",
1516 aux->u.auxent.x_csect.x_parmhash,
1517 (unsigned int) aux->u.auxent.x_csect.x_snhash,
1518 SMTYP_SMTYP (aux->u.auxent.x_csect.x_smtyp),
1519 SMTYP_ALIGN (aux->u.auxent.x_csect.x_smtyp),
1520 (unsigned int) aux->u.auxent.x_csect.x_smclas,
1521 aux->u.auxent.x_csect.x_stab,
1522 (unsigned int) aux->u.auxent.x_csect.x_snstab);
1527 /* Return false to indicate that no special action was taken. */
1535 To write relocations, the back end steps though the
1536 canonical relocation table and create an
1537 @code{internal_reloc}. The symbol index to use is removed from
1538 the @code{offset} field in the symbol table supplied. The
1539 address comes directly from the sum of the section base
1540 address and the relocation offset; the type is dug directly
1541 from the howto field. Then the @code{internal_reloc} is
1542 swapped into the shape of an @code{external_reloc} and written
1548 coff_write_relocs (abfd, first_undef)
1553 for (s = abfd->sections; s != (asection *) NULL; s = s->next)
1556 struct external_reloc dst;
1558 arelent **p = s->orelocation;
1559 if (bfd_seek (abfd, s->rel_filepos, SEEK_SET) != 0)
1561 for (i = 0; i < s->reloc_count; i++)
1563 struct internal_reloc n;
1565 memset ((PTR) & n, 0, sizeof (n));
1567 /* Now we've renumbered the symbols we know where the
1568 undefined symbols live in the table. Check the reloc
1569 entries for symbols who's output bfd isn't the right one.
1570 This is because the symbol was undefined (which means
1571 that all the pointers are never made to point to the same
1572 place). This is a bad thing,'cause the symbols attached
1573 to the output bfd are indexed, so that the relocation
1574 entries know which symbol index they point to. So we
1575 have to look up the output symbol here. */
1577 if (q->sym_ptr_ptr[0]->the_bfd != abfd)
1580 const char *sname = q->sym_ptr_ptr[0]->name;
1581 asymbol **outsyms = abfd->outsymbols;
1582 for (i = first_undef; outsyms[i]; i++)
1584 const char *intable = outsyms[i]->name;
1585 if (strcmp (intable, sname) == 0) {
1586 /* got a hit, so repoint the reloc */
1587 q->sym_ptr_ptr = outsyms + i;
1593 n.r_vaddr = q->address + s->vma;
1596 /* The 29k const/consth reloc pair is a real kludge. The consth
1597 part doesn't have a symbol; it has an offset. So rebuilt
1599 if (q->howto->type == R_IHCONST)
1600 n.r_symndx = q->addend;
1605 if (q->sym_ptr_ptr == bfd_abs_section_ptr->symbol_ptr_ptr)
1606 /* This is a relocation relative to the absolute symbol. */
1610 n.r_symndx = get_index ((*(q->sym_ptr_ptr)));
1611 /* Take notice if the symbol reloc points to a symbol
1612 we don't have in our symbol table. What should we
1614 if (n.r_symndx > obj_conv_table_size (abfd))
1619 #ifdef SWAP_OUT_RELOC_OFFSET
1620 n.r_offset = q->addend;
1624 /* Work out reloc type from what is required */
1625 SELECT_RELOC (n, q->howto);
1627 n.r_type = q->howto->type;
1629 coff_swap_reloc_out (abfd, &n, &dst);
1630 if (bfd_write ((PTR) & dst, 1, RELSZ, abfd) != RELSZ)
1638 /* Set flags and magic number of a coff file from architecture and machine
1639 type. Result is true if we can represent the arch&type, false if not. */
1642 coff_set_flags (abfd, magicp, flagsp)
1645 unsigned short *flagsp;
1647 switch (bfd_get_arch (abfd))
1652 switch (bfd_get_mach (abfd))
1654 case bfd_mach_z8001:
1657 case bfd_mach_z8002:
1671 *magicp = I960ROMAGIC;
1673 ((bfd_get_file_flags(abfd) & WP_TEXT) ? I960ROMAGIC :
1674 I960RWMAGIC); FIXME???
1676 switch (bfd_get_mach (abfd))
1678 case bfd_mach_i960_core:
1681 case bfd_mach_i960_kb_sb:
1684 case bfd_mach_i960_mc:
1687 case bfd_mach_i960_xa:
1690 case bfd_mach_i960_ca:
1693 case bfd_mach_i960_ka_sa:
1696 /* start-sanitize-i960xl */
1697 case bfd_mach_i960_xl:
1700 /* end-sanitize-i960xl */
1715 case bfd_arch_powerpc:
1722 *magicp = I386MAGIC;
1724 /* Just overwrite the usual value if we're doing Lynx. */
1725 *magicp = LYNXCOFFMAGIC;
1732 *magicp = I860MAGIC;
1738 #ifdef APOLLOM68KMAGIC
1739 *magicp = APOLLO_COFF_VERSION_NUMBER;
1741 *magicp = MC68MAGIC;
1744 /* Just overwrite the usual value if we're doing Lynx. */
1745 *magicp = LYNXCOFFMAGIC;
1753 *magicp = MC88OMAGIC;
1758 case bfd_arch_h8300:
1759 switch (bfd_get_mach (abfd))
1761 case bfd_mach_h8300:
1762 *magicp = H8300MAGIC;
1764 case bfd_mach_h8300h:
1765 *magicp = H8300HMAGIC;
1771 #ifdef SH_ARCH_MAGIC_BIG
1773 if (bfd_big_endian (abfd))
1774 *magicp = SH_ARCH_MAGIC_BIG;
1776 *magicp = SH_ARCH_MAGIC_LITTLE;
1782 case bfd_arch_sparc:
1783 *magicp = SPARCMAGIC;
1785 /* Just overwrite the usual value if we're doing Lynx. */
1786 *magicp = LYNXCOFFMAGIC;
1793 case bfd_arch_h8500:
1794 *magicp = H8500MAGIC;
1798 #ifdef A29K_MAGIC_BIG
1800 if (bfd_big_endian (abfd))
1801 *magicp = A29K_MAGIC_BIG;
1803 *magicp = A29K_MAGIC_LITTLE;
1809 case bfd_arch_we32k:
1810 *magicp = WE32KMAGIC;
1816 case bfd_arch_rs6000:
1818 case bfd_arch_powerpc:
1820 *magicp = U802TOCMAGIC;
1825 default: /* Unknown architecture */
1826 /* return false; -- fall through to "return false" below, to avoid
1827 "statement never reached" errors on the one below. */
1836 coff_set_arch_mach (abfd, arch, machine)
1838 enum bfd_architecture arch;
1839 unsigned long machine;
1842 unsigned short dummy2;
1844 if (! bfd_default_set_arch_mach (abfd, arch, machine))
1847 if (arch != bfd_arch_unknown &&
1848 coff_set_flags (abfd, &dummy1, &dummy2) != true)
1849 return false; /* We can't represent this type */
1851 return true; /* We're easy ... */
1855 /* Calculate the file position for each section. */
1858 coff_compute_section_file_positions (abfd)
1862 asection *previous = (asection *) NULL;
1863 file_ptr sofar = FILHSZ;
1871 /* On XCOFF, if we have symbols, set up the .debug section. */
1872 if (bfd_get_symcount (abfd) > 0)
1875 bfd_size_type i, symcount;
1879 symcount = bfd_get_symcount (abfd);
1880 for (symp = abfd->outsymbols, i = 0; i < symcount; symp++, i++)
1882 coff_symbol_type *cf;
1884 cf = coff_symbol_from (abfd, *symp);
1886 && cf->native != NULL
1887 && SYMNAME_IN_DEBUG (&cf->native->u.syment))
1891 len = strlen (bfd_asymbol_name (*symp));
1900 dsec = bfd_make_section_old_way (abfd, ".debug");
1903 dsec->_raw_size = sz;
1904 dsec->flags |= SEC_HAS_CONTENTS;
1909 #ifdef COFF_IMAGE_WITH_PE
1911 if (coff_data (abfd)->link_info)
1913 page_size = pe_data (abfd)->pe_opthdr.FileAlignment;
1916 page_size = PE_DEF_FILE_ALIGNMENT;
1918 #ifdef COFF_PAGE_SIZE
1919 int page_size = COFF_PAGE_SIZE;
1923 if (bfd_get_start_address (abfd))
1925 /* A start address may have been added to the original file. In this
1926 case it will need an optional header to record it. */
1927 abfd->flags |= EXEC_P;
1930 if (abfd->flags & EXEC_P)
1933 else if (xcoff_data (abfd)->full_aouthdr)
1936 sofar += SMALL_AOUTSZ;
1939 sofar += abfd->section_count * SCNHSZ;
1942 /* XCOFF handles overflows in the reloc and line number count fields
1943 by allocating a new section header to hold the correct counts. */
1944 for (current = abfd->sections; current != NULL; current = current->next)
1945 if (current->reloc_count >= 0xffff || current->lineno_count >= 0xffff)
1949 for (current = abfd->sections, count = 1;
1950 current != (asection *) NULL;
1951 current = current->next, ++count)
1953 current->target_index = count;
1955 /* Only deal with sections which have contents */
1956 if (!(current->flags & SEC_HAS_CONTENTS))
1960 /* Do not include the .junk section. This is where we collect section
1961 data which we don't need. This is mainly the MS .debug$ data which
1962 stores codeview debug data. */
1963 if (strcmp (current->name, ".junk") == 0)
1969 /* Align the sections in the file to the same boundary on
1970 which they are aligned in virtual memory. I960 doesn't
1971 do this (FIXME) so we can stay in sync with Intel. 960
1972 doesn't yet page from files... */
1974 if ((abfd->flags & EXEC_P) != 0)
1976 /* make sure this section is aligned on the right boundary - by
1977 padding the previous section up if necessary */
1980 sofar = BFD_ALIGN (sofar, 1 << current->alignment_power);
1981 if (previous != (asection *) NULL)
1983 previous->_raw_size += sofar - old_sofar;
1989 /* In demand paged files the low order bits of the file offset
1990 must match the low order bits of the virtual address. */
1991 #ifdef COFF_PAGE_SIZE
1992 if ((abfd->flags & D_PAGED) != 0
1993 && (current->flags & SEC_ALLOC) != 0)
1994 sofar += (current->vma - sofar) % page_size;
1996 current->filepos = sofar;
1998 #ifdef COFF_IMAGE_WITH_PE
1999 /* With PE we have to pad each section to be a multiple of its page size
2000 too, and remember both sizes. Cooked_size becomes very useful. */
2001 current->_cooked_size = current->_raw_size;
2002 current->_raw_size = (current->_raw_size + page_size -1) & -page_size;
2005 sofar += current->_raw_size;
2008 /* make sure that this section is of the right size too */
2010 sofar = BFD_ALIGN (sofar, 1 << current->alignment_power);
2011 current->_raw_size += sofar - old_sofar;
2015 /* Force .lib sections to start at zero. The vma is then
2016 incremented in coff_set_section_contents. This is right for
2018 if (strcmp (current->name, _LIB) == 0)
2019 bfd_set_section_vma (abfd, current, 0);
2025 obj_relocbase (abfd) = sofar;
2026 abfd->output_has_begun = true;
2030 #ifndef RS6000COFF_C
2032 /* If .file, .text, .data, .bss symbols are missing, add them. */
2033 /* @@ Should we only be adding missing symbols, or overriding the aux
2034 values for existing section symbols? */
2036 coff_add_missing_symbols (abfd)
2039 unsigned int nsyms = bfd_get_symcount (abfd);
2040 asymbol **sympp = abfd->outsymbols;
2043 int need_text = 1, need_data = 1, need_bss = 1, need_file = 1;
2045 for (i = 0; i < nsyms; i++)
2047 coff_symbol_type *csym = coff_symbol_from (abfd, sympp[i]);
2051 /* only do this if there is a coff representation of the input
2053 if (csym->native && csym->native->u.syment.n_sclass == C_FILE)
2058 name = csym->symbol.name;
2061 if (!strcmp (name, _TEXT))
2064 else if (!strcmp (name, ".wtext"))
2067 else if (!strcmp (name, _DATA))
2069 else if (!strcmp (name, _BSS))
2073 /* Now i == bfd_get_symcount (abfd). */
2074 /* @@ For now, don't deal with .file symbol. */
2077 if (!need_text && !need_data && !need_bss && !need_file)
2079 nsyms += need_text + need_data + need_bss + need_file;
2080 sympp2 = (asymbol **) bfd_alloc_by_size_t (abfd, nsyms * sizeof (asymbol *));
2083 memcpy (sympp2, sympp, i * sizeof (asymbol *));
2086 /* @@ Generate fake .file symbol, in sympp2[i], and increment i. */
2090 sympp2[i++] = coff_section_symbol (abfd, _TEXT);
2092 sympp2[i++] = coff_section_symbol (abfd, _DATA);
2094 sympp2[i++] = coff_section_symbol (abfd, _BSS);
2095 BFD_ASSERT (i == nsyms);
2096 bfd_set_symtab (abfd, sympp2, nsyms);
2100 #endif /* ! defined (RS6000COFF_C) */
2107 coff_write_object_contents (abfd)
2111 boolean hasrelocs = false;
2112 boolean haslinno = false;
2114 file_ptr reloc_base;
2115 file_ptr lineno_base;
2117 unsigned long reloc_size = 0;
2118 unsigned long lnno_size = 0;
2119 asection *text_sec = NULL;
2120 asection *data_sec = NULL;
2121 asection *bss_sec = NULL;
2123 struct internal_filehdr internal_f;
2124 struct internal_aouthdr internal_a;
2126 bfd_set_error (bfd_error_system_call);
2128 /* Make a pass through the symbol table to count line number entries and
2129 put them into the correct asections */
2131 lnno_size = coff_count_linenumbers (abfd) * LINESZ;
2133 if (abfd->output_has_begun == false)
2134 coff_compute_section_file_positions (abfd);
2136 reloc_base = obj_relocbase (abfd);
2138 /* Work out the size of the reloc and linno areas */
2140 for (current = abfd->sections; current != NULL; current =
2142 reloc_size += current->reloc_count * RELSZ;
2144 lineno_base = reloc_base + reloc_size;
2145 sym_base = lineno_base + lnno_size;
2147 /* Indicate in each section->line_filepos its actual file address */
2148 for (current = abfd->sections; current != NULL; current =
2151 if (current->lineno_count)
2153 current->line_filepos = lineno_base;
2154 current->moving_line_filepos = lineno_base;
2155 lineno_base += current->lineno_count * LINESZ;
2159 current->line_filepos = 0;
2161 if (current->reloc_count)
2163 current->rel_filepos = reloc_base;
2164 reloc_base += current->reloc_count * RELSZ;
2168 current->rel_filepos = 0;
2172 /* Write section headers to the file. */
2173 internal_f.f_nscns = 0;
2175 if ((abfd->flags & EXEC_P) != 0)
2176 scn_base = FILHSZ + AOUTSZ;
2181 if (xcoff_data (abfd)->full_aouthdr)
2184 scn_base += SMALL_AOUTSZ;
2188 if (bfd_seek (abfd, scn_base, SEEK_SET) != 0)
2191 for (current = abfd->sections;
2193 current = current->next)
2195 struct internal_scnhdr section;
2198 /* Do not include the .junk section. This is where we collect section
2199 data which we don't need. This is mainly the MS .debug$ data which
2200 stores codeview debug data. */
2201 if (strcmp (current->name, ".junk") == 0)
2206 /* If we've got a .reloc section, remember. */
2208 #ifdef COFF_IMAGE_WITH_PE
2209 if (strcmp (current->name, ".reloc") == 0)
2211 pe_data (abfd)->has_reloc_section = 1;
2216 internal_f.f_nscns++;
2217 strncpy (&(section.s_name[0]), current->name, 8);
2219 /* Always set s_vaddr of .lib to 0. This is right for SVR3.2
2220 Ian Taylor <ian@cygnus.com>. */
2221 if (strcmp (current->name, _LIB) == 0)
2222 section.s_vaddr = 0;
2225 section.s_vaddr = current->vma;
2226 section.s_paddr = current->lma;
2227 section.s_size = current->_raw_size;
2230 section.s_paddr = current->_cooked_size;
2234 If this section has no size or is unloadable then the scnptr
2237 if (current->_raw_size == 0 ||
2238 (current->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2240 section.s_scnptr = 0;
2244 section.s_scnptr = current->filepos;
2246 section.s_relptr = current->rel_filepos;
2247 section.s_lnnoptr = current->line_filepos;
2248 section.s_nreloc = current->reloc_count;
2249 section.s_nlnno = current->lineno_count;
2250 if (current->reloc_count != 0)
2252 if (current->lineno_count != 0)
2256 /* Indicate the use of an XCOFF overflow section header. */
2257 if (current->reloc_count >= 0xffff || current->lineno_count >= 0xffff)
2259 section.s_nreloc = 0xffff;
2260 section.s_nlnno = 0xffff;
2264 section.s_flags = sec_to_styp_flags (current->name, current->flags);
2266 if (!strcmp (current->name, _TEXT))
2270 else if (!strcmp (current->name, _DATA))
2274 else if (!strcmp (current->name, _BSS))
2280 section.s_align = (current->alignment_power
2281 ? 1 << current->alignment_power
2286 #ifdef COFF_IMAGE_WITH_PE
2287 /* suppress output of the sections if they are null. ld includes
2288 the bss and data sections even if there is no size assigned
2289 to them. NT loader doesn't like it if these section headers are
2290 included if the sections themselves are not needed */
2291 if (section.s_size == 0)
2292 internal_f.f_nscns--;
2297 if (coff_swap_scnhdr_out (abfd, §ion, &buff) == 0
2298 || bfd_write ((PTR) (&buff), 1, SCNHSZ, abfd) != SCNHSZ)
2304 /* XCOFF handles overflows in the reloc and line number count fields
2305 by creating a new section header to hold the correct values. */
2306 for (current = abfd->sections; current != NULL; current = current->next)
2308 if (current->reloc_count >= 0xffff || current->lineno_count >= 0xffff)
2310 struct internal_scnhdr scnhdr;
2313 internal_f.f_nscns++;
2314 strncpy (&(scnhdr.s_name[0]), current->name, 8);
2315 scnhdr.s_paddr = current->reloc_count;
2316 scnhdr.s_vaddr = current->lineno_count;
2318 scnhdr.s_scnptr = 0;
2319 scnhdr.s_relptr = current->rel_filepos;
2320 scnhdr.s_lnnoptr = current->line_filepos;
2321 scnhdr.s_nreloc = current->target_index;
2322 scnhdr.s_nlnno = current->target_index;
2323 scnhdr.s_flags = STYP_OVRFLO;
2324 if (coff_swap_scnhdr_out (abfd, &scnhdr, &buff) == 0
2325 || bfd_write ((PTR) &buff, 1, SCNHSZ, abfd) != SCNHSZ)
2331 /* OK, now set up the filehdr... */
2333 /* Don't include the internal abs section in the section count */
2336 We will NOT put a fucking timestamp in the header here. Every time you
2337 put it back, I will come in and take it out again. I'm sorry. This
2338 field does not belong here. We fill it with a 0 so it compares the
2339 same but is not a reasonable time. -- gnu@cygnus.com
2341 internal_f.f_timdat = 0;
2343 internal_f.f_flags = 0;
2345 if (abfd->flags & EXEC_P)
2346 internal_f.f_opthdr = AOUTSZ;
2349 internal_f.f_opthdr = 0;
2351 if (xcoff_data (abfd)->full_aouthdr)
2352 internal_f.f_opthdr = AOUTSZ;
2354 internal_f.f_opthdr = SMALL_AOUTSZ;
2359 internal_f.f_flags |= F_RELFLG;
2361 internal_f.f_flags |= F_LNNO;
2362 if (abfd->flags & EXEC_P)
2363 internal_f.f_flags |= F_EXEC;
2365 /* FIXME: this is wrong for PPC_PE! */
2366 if (bfd_little_endian (abfd))
2367 internal_f.f_flags |= F_AR32WR;
2369 internal_f.f_flags |= F_AR32W;
2372 FIXME, should do something about the other byte orders and
2377 if ((abfd->flags & DYNAMIC) != 0)
2378 internal_f.f_flags |= F_SHROBJ;
2379 if (bfd_get_section_by_name (abfd, _LOADER) != NULL)
2380 internal_f.f_flags |= F_DYNLOAD;
2383 memset (&internal_a, 0, sizeof internal_a);
2385 /* Set up architecture-dependent stuff */
2388 unsigned int magic = 0;
2389 unsigned short flags = 0;
2390 coff_set_flags (abfd, &magic, &flags);
2391 internal_f.f_magic = magic;
2392 internal_f.f_flags |= flags;
2393 /* ...and the "opt"hdr... */
2396 #ifdef ULTRA3 /* NYU's machine */
2397 /* FIXME: This is a bogus check. I really want to see if there
2398 * is a .shbss or a .shdata section, if so then set the magic
2399 * number to indicate a shared data executable.
2401 if (internal_f.f_nscns >= 7)
2402 internal_a.magic = SHMAGIC; /* Shared magic */
2405 internal_a.magic = NMAGIC; /* Assume separate i/d */
2406 #define __A_MAGIC_SET__
2409 /* FIXME: What are the a.out magic numbers for the i860? */
2410 internal_a.magic = 0;
2411 #define __A_MAGIC_SET__
2414 internal_a.magic = (magic == I960ROMAGIC ? NMAGIC : OMAGIC);
2415 #define __A_MAGIC_SET__
2418 #define __A_MAGIC_SET__
2419 internal_a.magic = PAGEMAGICBCS;
2423 #define __A_MAGIC_SET__
2424 internal_a.magic = APOLLO_COFF_VERSION_NUMBER;
2427 #if defined(M68) || defined(WE32K) || defined(M68K)
2428 #define __A_MAGIC_SET__
2430 internal_a.magic = LYNXCOFFMAGIC;
2432 #if defined (PAGEMAGICPEXECPAGED)
2433 internal_a.magic = PAGEMAGICPEXECPAGED;
2436 #endif /* M68 || WE32K || M68K */
2439 #define __A_MAGIC_SET__
2440 internal_a.magic = ZMAGIC;
2443 #define __A_MAGIC_SET__
2444 internal_a.magic = IMAGE_NT_OPTIONAL_HDR_MAGIC;
2447 #define __A_MAGIC_SET__
2449 internal_a.magic = LYNXCOFFMAGIC;
2451 internal_a.magic = ZMAGIC;
2456 #define __A_MAGIC_SET__
2458 internal_a.magic = LYNXCOFFMAGIC;
2463 #define __A_MAGIC_SET__
2464 internal_a.magic = (abfd->flags & D_PAGED) ? RS6K_AOUTHDR_ZMAGIC :
2465 (abfd->flags & WP_TEXT) ? RS6K_AOUTHDR_NMAGIC :
2466 RS6K_AOUTHDR_OMAGIC;
2469 #ifndef __A_MAGIC_SET__
2470 #include "Your aouthdr magic number is not being set!"
2472 #undef __A_MAGIC_SET__
2476 /* FIXME: Does anybody ever set this to another value? */
2477 internal_a.vstamp = 0;
2479 /* Now should write relocs, strings, syms */
2480 obj_sym_filepos (abfd) = sym_base;
2482 if (bfd_get_symcount (abfd) != 0)
2485 #ifndef RS6000COFF_C
2486 if (!coff_add_missing_symbols (abfd))
2489 if (!coff_renumber_symbols (abfd, &firstundef))
2491 coff_mangle_symbols (abfd);
2492 if (! coff_write_symbols (abfd))
2494 if (! coff_write_linenumbers (abfd))
2496 if (! coff_write_relocs (abfd, firstundef))
2499 #ifdef COFF_IMAGE_WITH_PE
2501 else if ((abfd->flags & EXEC_P) != 0)
2505 /* PowerPC PE appears to require that all executable files be
2506 rounded up to the page size. */
2509 BFD_ALIGN (sym_base, COFF_PAGE_SIZE) - 1,
2511 || bfd_write (&b, 1, 1, abfd) != 1)
2517 /* If bfd_get_symcount (abfd) != 0, then we are not using the COFF
2518 backend linker, and obj_raw_syment_count is not valid until after
2519 coff_write_symbols is called. */
2520 if (obj_raw_syment_count (abfd) != 0)
2522 internal_f.f_symptr = sym_base;
2524 /* AIX appears to require that F_RELFLG not be set if there are
2525 local symbols but no relocations. */
2526 internal_f.f_flags &=~ F_RELFLG;
2531 internal_f.f_symptr = 0;
2532 internal_f.f_flags |= F_LSYMS;
2537 internal_a.tsize = bfd_get_section_size_before_reloc (text_sec);
2538 internal_a.text_start = internal_a.tsize ? text_sec->vma : 0;
2542 internal_a.dsize = bfd_get_section_size_before_reloc (data_sec);
2543 internal_a.data_start = internal_a.dsize ? data_sec->vma : 0;
2547 internal_a.bsize = bfd_get_section_size_before_reloc (bss_sec);
2548 if (internal_a.bsize && bss_sec->vma < internal_a.data_start)
2549 internal_a.data_start = bss_sec->vma;
2552 internal_a.entry = bfd_get_start_address (abfd);
2553 internal_f.f_nsyms = obj_raw_syment_count (abfd);
2556 if (xcoff_data (abfd)->full_aouthdr)
2559 asection *loader_sec;
2561 internal_a.vstamp = 1;
2563 if (xcoff_data (abfd)->entry_section != NULL)
2564 internal_a.o_snentry = xcoff_data (abfd)->entry_section->target_index;
2567 internal_a.o_snentry = 0;
2568 internal_a.entry = (bfd_vma) -1;
2571 if (text_sec != NULL)
2573 internal_a.o_sntext = text_sec->target_index;
2574 internal_a.o_algntext = bfd_get_section_alignment (abfd, text_sec);
2578 internal_a.o_sntext = 0;
2579 internal_a.o_algntext = 0;
2581 if (data_sec != NULL)
2583 internal_a.o_sndata = data_sec->target_index;
2584 internal_a.o_algndata = bfd_get_section_alignment (abfd, data_sec);
2588 internal_a.o_sndata = 0;
2589 internal_a.o_algndata = 0;
2591 loader_sec = bfd_get_section_by_name (abfd, ".loader");
2592 if (loader_sec != NULL)
2593 internal_a.o_snloader = loader_sec->target_index;
2595 internal_a.o_snloader = 0;
2596 if (bss_sec != NULL)
2597 internal_a.o_snbss = bss_sec->target_index;
2599 internal_a.o_snbss = 0;
2601 toc = xcoff_data (abfd)->toc;
2602 internal_a.o_toc = toc;
2603 if (xcoff_data (abfd)->toc_section == NULL)
2604 internal_a.o_sntoc = 0;
2606 internal_a.o_sntoc = xcoff_data (abfd)->toc_section->target_index;
2608 internal_a.o_modtype = xcoff_data (abfd)->modtype;
2609 if (xcoff_data (abfd)->cputype != -1)
2610 internal_a.o_cputype = xcoff_data (abfd)->cputype;
2613 switch (bfd_get_arch (abfd))
2615 case bfd_arch_rs6000:
2616 internal_a.o_cputype = 4;
2618 case bfd_arch_powerpc:
2619 if (bfd_get_mach (abfd) == 0)
2620 internal_a.o_cputype = 3;
2622 internal_a.o_cputype = 1;
2628 internal_a.o_maxstack = xcoff_data (abfd)->maxstack;
2629 internal_a.o_maxdata = xcoff_data (abfd)->maxdata;
2633 /* now write them */
2634 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
2638 coff_swap_filehdr_out (abfd, (PTR) & internal_f, (PTR) & buff);
2639 if (bfd_write ((PTR) & buff, 1, FILHSZ, abfd) != FILHSZ)
2642 if (abfd->flags & EXEC_P)
2645 coff_swap_aouthdr_out (abfd, (PTR) & internal_a, (PTR) & buff);
2646 if (bfd_write ((PTR) & buff, 1, AOUTSZ, abfd) != AOUTSZ)
2655 /* XCOFF seems to always write at least a small a.out header. */
2656 coff_swap_aouthdr_out (abfd, (PTR) &internal_a, (PTR) &buff);
2657 if (xcoff_data (abfd)->full_aouthdr)
2660 size = SMALL_AOUTSZ;
2661 if (bfd_write ((PTR) &buff, 1, size, abfd) != size)
2670 coff_set_section_contents (abfd, section, location, offset, count)
2675 bfd_size_type count;
2677 if (abfd->output_has_begun == false) /* set by bfd.c handler */
2678 coff_compute_section_file_positions (abfd);
2681 /* If this is a .lib section, bump the vma address so that it
2682 winds up being the number of .lib sections output. This is
2683 right for SVR3.2. Shared libraries should probably get more
2684 generic support. Ian Taylor <ian@cygnus.com>. */
2685 if (strcmp (section->name, _LIB) == 0)
2689 /* Don't write out bss sections - one way to do this is to
2690 see if the filepos has not been set. */
2691 if (section->filepos == 0)
2694 if (bfd_seek (abfd, (file_ptr) (section->filepos + offset), SEEK_SET) != 0)
2699 return (bfd_write (location, 1, count, abfd) == count) ? true : false;
2705 coff_close_and_cleanup (abfd)
2708 if (!bfd_read_p (abfd))
2709 switch (abfd->format)
2712 if (!_bfd_write_archive_contents (abfd))
2716 if (!coff_write_object_contents (abfd))
2720 bfd_set_error (bfd_error_invalid_operation);
2724 /* We depend on bfd_close to free all the memory on the obstack. */
2725 /* FIXME if bfd_release is not using obstacks! */
2732 buy_and_read (abfd, where, seek_direction, size)
2738 PTR area = (PTR) bfd_alloc (abfd, size);
2741 if (bfd_seek (abfd, where, seek_direction) != 0
2742 || bfd_read (area, 1, size, abfd) != size)
2745 } /* buy_and_read() */
2751 Creating the linenumber table is done by reading in the entire
2752 coff linenumber table, and creating another table for internal use.
2754 A coff linenumber table is structured so that each function
2755 is marked as having a line number of 0. Each line within the
2756 function is an offset from the first line in the function. The
2757 base of the line number information for the table is stored in
2758 the symbol associated with the function.
2760 The information is copied from the external to the internal
2761 table, and each symbol which marks a function is marked by
2764 How does this work ?
2769 coff_slurp_line_table (abfd, asect)
2773 LINENO *native_lineno;
2774 alent *lineno_cache;
2776 BFD_ASSERT (asect->lineno == (alent *) NULL);
2778 native_lineno = (LINENO *) buy_and_read (abfd,
2779 asect->line_filepos,
2782 asect->lineno_count));
2784 (alent *) bfd_alloc (abfd, (size_t) ((asect->lineno_count + 1) * sizeof (alent)));
2785 if (lineno_cache == NULL)
2789 unsigned int counter = 0;
2790 alent *cache_ptr = lineno_cache;
2791 LINENO *src = native_lineno;
2793 while (counter < asect->lineno_count)
2795 struct internal_lineno dst;
2796 coff_swap_lineno_in (abfd, src, &dst);
2797 cache_ptr->line_number = dst.l_lnno;
2799 if (cache_ptr->line_number == 0)
2801 coff_symbol_type *sym =
2802 (coff_symbol_type *) (dst.l_addr.l_symndx
2803 + obj_raw_syments (abfd))->u.syment._n._n_n._n_zeroes;
2804 cache_ptr->u.sym = (asymbol *) sym;
2805 if (sym->lineno != NULL)
2807 (*_bfd_error_handler)
2808 ("%s: warning: duplicate line number information for `%s'",
2809 bfd_get_filename (abfd),
2810 bfd_asymbol_name (&sym->symbol));
2812 sym->lineno = cache_ptr;
2816 cache_ptr->u.offset = dst.l_addr.l_paddr
2817 - bfd_section_vma (abfd, asect);
2818 } /* If no linenumber expect a symbol index */
2824 cache_ptr->line_number = 0;
2827 asect->lineno = lineno_cache;
2828 /* FIXME, free native_lineno here, or use alloca or something. */
2833 coff_slurp_symbol_table (abfd)
2836 combined_entry_type *native_symbols;
2837 coff_symbol_type *cached_area;
2838 unsigned int *table_ptr;
2840 unsigned int number_of_symbols = 0;
2842 if (obj_symbols (abfd))
2845 /* Read in the symbol table */
2846 if ((native_symbols = coff_get_normalized_symtab (abfd)) == NULL)
2851 /* Allocate enough room for all the symbols in cached form */
2852 cached_area = ((coff_symbol_type *)
2854 (obj_raw_syment_count (abfd)
2855 * sizeof (coff_symbol_type))));
2857 if (cached_area == NULL)
2859 table_ptr = ((unsigned int *)
2861 (obj_raw_syment_count (abfd)
2862 * sizeof (unsigned int))));
2864 if (table_ptr == NULL)
2868 coff_symbol_type *dst = cached_area;
2869 unsigned int last_native_index = obj_raw_syment_count (abfd);
2870 unsigned int this_index = 0;
2871 while (this_index < last_native_index)
2873 combined_entry_type *src = native_symbols + this_index;
2874 table_ptr[this_index] = number_of_symbols;
2875 dst->symbol.the_bfd = abfd;
2877 dst->symbol.name = (char *) (src->u.syment._n._n_n._n_offset);
2878 /* We use the native name field to point to the cached field. */
2879 src->u.syment._n._n_n._n_zeroes = (long) dst;
2880 dst->symbol.section = coff_section_from_bfd_index (abfd,
2881 src->u.syment.n_scnum);
2882 dst->symbol.flags = 0;
2883 dst->done_lineno = false;
2885 switch (src->u.syment.n_sclass)
2890 dst->symbol.value = src->u.syment.n_value - dst->symbol.section->vma;
2891 dst->symbol.flags = BSF_EXPORT | BSF_GLOBAL;
2892 dst->symbol.flags |= BSF_NOT_AT_END | BSF_FUNCTION;
2894 /* Fall through to next case */
2903 /* PE uses storage class 0x68 to denote a section symbol */
2905 /* PE uses storage class 0x67 for a weak external symbol. */
2908 if ((src->u.syment.n_scnum) == 0)
2910 if ((src->u.syment.n_value) == 0)
2912 dst->symbol.section = bfd_und_section_ptr;
2913 dst->symbol.value = 0;
2917 dst->symbol.section = bfd_com_section_ptr;
2918 dst->symbol.value = (src->u.syment.n_value);
2923 /* Base the value as an index from the base of the
2926 dst->symbol.flags = BSF_EXPORT | BSF_GLOBAL;
2927 dst->symbol.value = (src->u.syment.n_value
2928 - dst->symbol.section->vma);
2930 if (ISFCN ((src->u.syment.n_type)))
2932 /* A function ext does not go at the end of a
2934 dst->symbol.flags |= BSF_NOT_AT_END | BSF_FUNCTION;
2939 /* A C_HIDEXT symbol is not global. */
2940 if (src->u.syment.n_sclass == C_HIDEXT)
2941 dst->symbol.flags = BSF_LOCAL;
2942 /* A symbol with a csect entry should not go at the end. */
2943 if (src->u.syment.n_numaux > 0)
2944 dst->symbol.flags |= BSF_NOT_AT_END;
2948 if (src->u.syment.n_sclass == C_NT_WEAK)
2949 dst->symbol.flags = BSF_WEAK;
2954 case C_STAT: /* static */
2956 case C_LEAFSTAT: /* static leaf procedure */
2958 case C_LABEL: /* label */
2959 if (src->u.syment.n_scnum == -2)
2960 dst->symbol.flags = BSF_DEBUGGING;
2962 dst->symbol.flags = BSF_LOCAL;
2964 Base the value as an index from the base of the section, if
2967 if (dst->symbol.section)
2968 dst->symbol.value = (src->u.syment.n_value) -
2969 dst->symbol.section->vma;
2971 dst->symbol.value = (src->u.syment.n_value);
2974 case C_MOS: /* member of structure */
2975 case C_EOS: /* end of structure */
2976 #ifdef NOTDEF /* C_AUTOARG has the same value */
2978 case C_GLBLREG: /* A29k-specific storage class */
2981 case C_REGPARM: /* register parameter */
2982 case C_REG: /* register variable */
2984 case C_AUTOARG: /* 960-specific storage class */
2986 case C_TPDEF: /* type definition */
2988 case C_AUTO: /* automatic variable */
2989 case C_FIELD: /* bit field */
2990 case C_ENTAG: /* enumeration tag */
2991 case C_MOE: /* member of enumeration */
2992 case C_MOU: /* member of union */
2993 case C_UNTAG: /* union tag */
2994 dst->symbol.flags = BSF_DEBUGGING;
2995 dst->symbol.value = (src->u.syment.n_value);
2998 case C_FILE: /* file name */
2999 case C_STRTAG: /* structure tag */
3014 dst->symbol.flags = BSF_DEBUGGING;
3015 dst->symbol.value = (src->u.syment.n_value);
3019 case C_BINCL: /* beginning of include file */
3020 case C_EINCL: /* ending of include file */
3021 /* The value is actually a pointer into the line numbers
3022 of the file. We locate the line number entry, and
3023 set the section to the section which contains it, and
3024 the value to the index in that section. */
3028 dst->symbol.flags = BSF_DEBUGGING;
3029 for (sec = abfd->sections; sec != NULL; sec = sec->next)
3030 if (sec->line_filepos <= (file_ptr) src->u.syment.n_value
3031 && ((file_ptr) (sec->line_filepos
3032 + sec->lineno_count * LINESZ)
3033 > (file_ptr) src->u.syment.n_value))
3036 dst->symbol.value = 0;
3039 dst->symbol.section = sec;
3040 dst->symbol.value = ((src->u.syment.n_value
3041 - sec->line_filepos)
3049 dst->symbol.flags = BSF_DEBUGGING;
3051 /* The value is actually a symbol index. Save a pointer
3052 to the symbol instead of the index. FIXME: This
3053 should use a union. */
3054 src->u.syment.n_value =
3055 (long) (native_symbols + src->u.syment.n_value);
3056 dst->symbol.value = src->u.syment.n_value;
3061 case C_BLOCK: /* ".bb" or ".eb" */
3062 case C_FCN: /* ".bf" or ".ef" */
3063 case C_EFCN: /* physical end of function */
3064 dst->symbol.flags = BSF_LOCAL;
3066 Base the value as an index from the base of the section
3068 dst->symbol.value = (src->u.syment.n_value) - dst->symbol.section->vma;
3072 case C_EXTDEF: /* external definition */
3073 case C_ULABEL: /* undefined label */
3074 case C_USTATIC: /* undefined static */
3075 #ifndef COFF_WITH_PE
3076 /* C_LINE in regular coff is 0x68. NT has taken over this storage
3077 class to represent a section symbol */
3078 case C_LINE: /* line # reformatted as symbol table entry */
3079 /* NT uses 0x67 for a weak symbol, not C_ALIAS. */
3080 case C_ALIAS: /* duplicate tag */
3082 case C_HIDDEN: /* ext symbol in dmert public lib */
3084 (*_bfd_error_handler)
3085 ("%s: Unrecognized storage class %d for %s symbol `%s'",
3086 bfd_get_filename (abfd), src->u.syment.n_sclass,
3087 dst->symbol.section->name, dst->symbol.name);
3088 dst->symbol.flags = BSF_DEBUGGING;
3089 dst->symbol.value = (src->u.syment.n_value);
3093 /* BFD_ASSERT(dst->symbol.flags != 0);*/
3097 dst->symbol.udata.i = 0;
3098 dst->lineno = (alent *) NULL;
3099 this_index += (src->u.syment.n_numaux) + 1;
3101 number_of_symbols++;
3102 } /* walk the native symtab */
3103 } /* bfdize the native symtab */
3105 obj_symbols (abfd) = cached_area;
3106 obj_raw_syments (abfd) = native_symbols;
3108 bfd_get_symcount (abfd) = number_of_symbols;
3109 obj_convert (abfd) = table_ptr;
3110 /* Slurp the line tables for each section too */
3116 coff_slurp_line_table (abfd, p);
3121 } /* coff_slurp_symbol_table() */
3123 /* Check whether a symbol is globally visible. This is used by the
3124 COFF backend linker code in cofflink.c, since a couple of targets
3125 have globally visible symbols which are not class C_EXT. This
3126 function need not handle the case of n_class == C_EXT. */
3128 #undef OTHER_GLOBAL_CLASS
3131 #define OTHER_GLOBAL_CLASS C_LEAFEXT
3135 #define OTHER_GLOBAL_CLASS C_SECTION
3138 #ifdef OTHER_GLOBAL_CLASS
3141 coff_sym_is_global (abfd, syment)
3143 struct internal_syment *syment;
3145 if (syment->n_sclass == OTHER_GLOBAL_CLASS)
3150 #undef OTHER_GLOBAL_CLASS
3152 #else /* ! defined (OTHER_GLOBAL_CLASS) */
3154 /* sym_is_global should not be defined if it has nothing to do. */
3156 #define coff_sym_is_global 0
3158 #endif /* ! defined (OTHER_GLOBAL_CLASS) */
3164 Coff relocations are easily transformed into the internal BFD form
3167 Reading a coff relocation table is done in the following stages:
3169 o Read the entire coff relocation table into memory.
3171 o Process each relocation in turn; first swap it from the
3172 external to the internal form.
3174 o Turn the symbol referenced in the relocation's symbol index
3175 into a pointer into the canonical symbol table.
3176 This table is the same as the one returned by a call to
3177 @code{bfd_canonicalize_symtab}. The back end will call that
3178 routine and save the result if a canonicalization hasn't been done.
3180 o The reloc index is turned into a pointer to a howto
3181 structure, in a back end specific way. For instance, the 386
3182 and 960 use the @code{r_type} to directly produce an index
3183 into a howto table vector; the 88k subtracts a number from the
3184 @code{r_type} field and creates an addend field.
3190 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
3192 coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \
3193 if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
3194 coffsym = (obj_symbols (abfd) \
3195 + (cache_ptr->sym_ptr_ptr - symbols)); \
3197 coffsym = coff_symbol_from (abfd, ptr); \
3198 if (coffsym != (coff_symbol_type *) NULL \
3199 && coffsym->native->u.syment.n_scnum == 0) \
3200 cache_ptr->addend = 0; \
3201 else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
3202 && ptr->section != (asection *) NULL) \
3203 cache_ptr->addend = - (ptr->section->vma + ptr->value); \
3205 cache_ptr->addend = 0; \
3210 coff_slurp_reloc_table (abfd, asect, symbols)
3215 RELOC *native_relocs;
3216 arelent *reloc_cache;
3221 if (asect->relocation)
3223 if (asect->reloc_count == 0)
3225 if (asect->flags & SEC_CONSTRUCTOR)
3227 if (!coff_slurp_symbol_table (abfd))
3230 (RELOC *) buy_and_read (abfd,
3234 asect->reloc_count));
3235 reloc_cache = (arelent *)
3236 bfd_alloc (abfd, (size_t) (asect->reloc_count * sizeof (arelent)));
3238 if (reloc_cache == NULL)
3242 for (idx = 0; idx < asect->reloc_count; idx++)
3244 #ifdef RELOC_PROCESSING
3245 struct internal_reloc dst;
3246 struct external_reloc *src;
3248 cache_ptr = reloc_cache + idx;
3249 src = native_relocs + idx;
3250 coff_swap_reloc_in (abfd, src, &dst);
3252 RELOC_PROCESSING (cache_ptr, &dst, symbols, abfd, asect);
3254 struct internal_reloc dst;
3256 struct external_reloc *src;
3258 cache_ptr = reloc_cache + idx;
3259 src = native_relocs + idx;
3261 coff_swap_reloc_in (abfd, src, &dst);
3264 cache_ptr->address = dst.r_vaddr;
3266 if (dst.r_symndx != -1)
3268 /* @@ Should never be greater than count of symbols! */
3269 if (dst.r_symndx >= obj_conv_table_size (abfd))
3271 cache_ptr->sym_ptr_ptr = symbols + obj_convert (abfd)[dst.r_symndx];
3272 ptr = *(cache_ptr->sym_ptr_ptr);
3276 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
3280 /* The symbols definitions that we have read in have been
3281 relocated as if their sections started at 0. But the offsets
3282 refering to the symbols in the raw data have not been
3283 modified, so we have to have a negative addend to compensate.
3285 Note that symbols which used to be common must be left alone */
3287 /* Calculate any reloc addend by looking at the symbol */
3288 CALC_ADDEND (abfd, ptr, dst, cache_ptr);
3290 cache_ptr->address -= asect->vma;
3291 /* !! cache_ptr->section = (asection *) NULL;*/
3293 /* Fill in the cache_ptr->howto field from dst.r_type */
3294 RTYPE2HOWTO (cache_ptr, &dst);
3299 asect->relocation = reloc_cache;
3303 #ifndef coff_rtype_to_howto
3306 /* Get the howto structure for a reloc. This is only used if the file
3307 including this one defines coff_relocate_section to be
3308 _bfd_coff_generic_relocate_section, so it is OK if it does not
3309 always work. It is the responsibility of the including file to
3310 make sure it is reasonable if it is needed. */
3312 static reloc_howto_type *coff_rtype_to_howto
3313 PARAMS ((bfd *, asection *, struct internal_reloc *,
3314 struct coff_link_hash_entry *, struct internal_syment *,
3318 static reloc_howto_type *
3319 coff_rtype_to_howto (abfd, sec, rel, h, sym, addendp)
3322 struct internal_reloc *rel;
3323 struct coff_link_hash_entry *h;
3324 struct internal_syment *sym;
3329 RTYPE2HOWTO (&genrel, rel);
3330 return genrel.howto;
3333 #else /* ! defined (RTYPE2HOWTO) */
3335 #define coff_rtype_to_howto NULL
3337 #endif /* ! defined (RTYPE2HOWTO) */
3338 #endif /* ! defined (coff_rtype_to_howto) */
3340 /* This is stupid. This function should be a boolean predicate. */
3342 coff_canonicalize_reloc (abfd, section, relptr, symbols)
3348 arelent *tblptr = section->relocation;
3349 unsigned int count = 0;
3352 if (section->flags & SEC_CONSTRUCTOR)
3354 /* this section has relocs made up by us, they are not in the
3355 file, so take them out of their chain and place them into
3356 the data area provided */
3357 arelent_chain *chain = section->constructor_chain;
3358 for (count = 0; count < section->reloc_count; count++)
3360 *relptr++ = &chain->relent;
3361 chain = chain->next;
3367 if (! coff_slurp_reloc_table (abfd, section, symbols))
3370 tblptr = section->relocation;
3372 for (; count++ < section->reloc_count;)
3373 *relptr++ = tblptr++;
3378 return section->reloc_count;
3383 coff_sym_filepos (abfd)
3386 return obj_sym_filepos (abfd);
3390 #ifndef coff_reloc16_estimate
3391 #define coff_reloc16_estimate dummy_reloc16_estimate
3394 dummy_reloc16_estimate (abfd, input_section, reloc, shrink, link_info)
3396 asection *input_section;
3398 unsigned int shrink;
3399 struct bfd_link_info *link_info;
3406 #ifndef coff_reloc16_extra_cases
3407 #define coff_reloc16_extra_cases dummy_reloc16_extra_cases
3408 /* This works even if abort is not declared in any header file. */
3410 dummy_reloc16_extra_cases (abfd, link_info, link_order, reloc, data, src_ptr,
3413 struct bfd_link_info *link_info;
3414 struct bfd_link_order *link_order;
3417 unsigned int *src_ptr;
3418 unsigned int *dst_ptr;
3424 /* If coff_relocate_section is defined, we can use the optimized COFF
3425 backend linker. Otherwise we must continue to use the old linker. */
3426 #ifdef coff_relocate_section
3427 #ifndef coff_bfd_link_hash_table_create
3428 #define coff_bfd_link_hash_table_create _bfd_coff_link_hash_table_create
3430 #ifndef coff_bfd_link_add_symbols
3431 #define coff_bfd_link_add_symbols _bfd_coff_link_add_symbols
3433 #ifndef coff_bfd_final_link
3434 #define coff_bfd_final_link _bfd_coff_final_link
3436 #else /* ! defined (coff_relocate_section) */
3437 #define coff_relocate_section NULL
3438 #define coff_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
3439 #define coff_bfd_link_add_symbols _bfd_generic_link_add_symbols
3440 #define coff_bfd_final_link _bfd_generic_final_link
3441 #endif /* ! defined (coff_relocate_section) */
3442 #define coff_bfd_link_split_section _bfd_generic_link_split_section
3444 #ifndef coff_start_final_link
3445 #define coff_start_final_link NULL
3448 #ifndef coff_adjust_symndx
3449 #define coff_adjust_symndx NULL
3452 static CONST bfd_coff_backend_data bfd_coff_std_swap_table =
3454 coff_swap_aux_in, coff_swap_sym_in, coff_swap_lineno_in,
3455 coff_swap_aux_out, coff_swap_sym_out,
3456 coff_swap_lineno_out, coff_swap_reloc_out,
3457 coff_swap_filehdr_out, coff_swap_aouthdr_out,
3458 coff_swap_scnhdr_out,
3459 FILHSZ, AOUTSZ, SCNHSZ, SYMESZ, AUXESZ, RELSZ, LINESZ,
3460 #ifdef COFF_LONG_FILENAMES
3465 coff_swap_filehdr_in, coff_swap_aouthdr_in, coff_swap_scnhdr_in,
3466 coff_swap_reloc_in, coff_bad_format_hook, coff_set_arch_mach_hook,
3467 coff_mkobject_hook, styp_to_sec_flags, coff_set_alignment_hook,
3468 coff_slurp_symbol_table, symname_in_debug_hook, coff_pointerize_aux_hook,
3469 coff_print_aux, coff_reloc16_extra_cases, coff_reloc16_estimate,
3470 coff_sym_is_global, coff_compute_section_file_positions,
3471 coff_start_final_link, coff_relocate_section, coff_rtype_to_howto,
3475 #define coff_close_and_cleanup _bfd_generic_close_and_cleanup
3476 #define coff_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
3477 #define coff_get_section_contents _bfd_generic_get_section_contents
3479 #ifndef coff_bfd_copy_private_symbol_data
3480 #define coff_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data
3483 #ifndef coff_bfd_copy_private_section_data
3484 #define coff_bfd_copy_private_section_data _bfd_generic_bfd_copy_private_section_data
3487 #ifndef coff_bfd_copy_private_bfd_data
3488 #define coff_bfd_copy_private_bfd_data _bfd_generic_bfd_copy_private_bfd_data
3491 #define coff_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
3492 #define coff_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
3494 #ifndef coff_bfd_print_private_bfd_data
3495 #define coff_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data
3498 #ifndef coff_bfd_is_local_label
3499 #define coff_bfd_is_local_label bfd_generic_is_local_label
3501 #ifndef coff_read_minisymbols
3502 #define coff_read_minisymbols _bfd_generic_read_minisymbols
3504 #ifndef coff_minisymbol_to_symbol
3505 #define coff_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
3508 /* The reloc lookup routine must be supplied by each individual COFF
3510 #ifndef coff_bfd_reloc_type_lookup
3511 #define coff_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
3514 #ifndef coff_bfd_get_relocated_section_contents
3515 #define coff_bfd_get_relocated_section_contents \
3516 bfd_generic_get_relocated_section_contents
3518 #ifndef coff_bfd_relax_section
3519 #define coff_bfd_relax_section bfd_generic_relax_section