1 /* Support for the generic parts of most COFF variants, for BFD.
2 Copyright 1990, 91, 92, 93, 94, 1995 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_slurp_symbol_table. *}
269 .unsigned int fix_scnlen : 1;
271 . {* The container for the symbol structure as read and translated
275 . union internal_auxent auxent;
276 . struct internal_syment syment;
278 .} combined_entry_type;
281 .{* Each canonical asymbol really looks like this: *}
283 .typedef struct coff_symbol_struct
285 . {* The actual symbol which the rest of BFD works with *}
288 . {* A pointer to the hidden information for this symbol *}
289 .combined_entry_type *native;
291 . {* A pointer to the linenumber information for this symbol *}
292 .struct lineno_cache_entry *lineno;
294 . {* Have the line numbers been relocated yet ? *}
295 .boolean done_lineno;
301 #if defined(COFF_IMAGE_WITH_PE) || (defined(COFF_OBJ_WITH_PE) && defined(PPC))
304 #include "coffswap.h"
308 /* void warning(); */
311 * Return a word with STYP_* (scnhdr.s_flags) flags set to represent the
312 * incoming SEC_* flags. The inverse of this function is styp_to_sec_flags().
313 * NOTE: If you add to/change this routine, you should mirror the changes
314 * in styp_to_sec_flags().
317 sec_to_styp_flags (sec_name, sec_flags)
318 CONST char *sec_name;
323 if (!strcmp (sec_name, _TEXT))
325 styp_flags = STYP_TEXT;
327 else if (!strcmp (sec_name, _DATA))
329 styp_flags = STYP_DATA;
331 else if (!strcmp (sec_name, _BSS))
333 styp_flags = STYP_BSS;
336 else if (!strcmp (sec_name, _COMMENT))
338 styp_flags = STYP_INFO;
339 #endif /* _COMMENT */
342 else if (!strcmp (sec_name, _LIB))
344 styp_flags = STYP_LIB;
348 else if (!strcmp (sec_name, _LIT))
350 styp_flags = STYP_LIT;
353 else if (!strcmp (sec_name, ".debug"))
356 styp_flags = STYP_DEBUG;
358 styp_flags = STYP_INFO;
361 else if (!strncmp (sec_name, ".stab", 5))
363 styp_flags = STYP_INFO;
366 else if (!strcmp (sec_name, ".edata"))
368 styp_flags = STYP_DATA;
371 /* Try and figure out what it should be */
372 else if (sec_flags & SEC_CODE)
374 styp_flags = STYP_TEXT;
376 else if (sec_flags & SEC_DATA)
378 styp_flags = STYP_DATA;
380 else if (sec_flags & SEC_READONLY)
382 #ifdef STYP_LIT /* 29k readonly text/data section */
383 styp_flags = STYP_LIT;
385 styp_flags = STYP_TEXT;
386 #endif /* STYP_LIT */
388 else if (sec_flags & SEC_LOAD)
390 styp_flags = STYP_TEXT;
392 else if (sec_flags & SEC_ALLOC)
394 styp_flags = STYP_BSS;
398 if ((sec_flags & (SEC_NEVER_LOAD | SEC_COFF_SHARED_LIBRARY)) != 0)
399 styp_flags |= STYP_NOLOAD;
405 * Return a word with SEC_* flags set to represent the incoming
406 * STYP_* flags (from scnhdr.s_flags). The inverse of this
407 * function is sec_to_styp_flags().
408 * NOTE: If you add to/change this routine, you should mirror the changes
409 * in sec_to_styp_flags().
412 styp_to_sec_flags (abfd, hdr, name)
417 struct internal_scnhdr *internal_s = (struct internal_scnhdr *) hdr;
418 long styp_flags = internal_s->s_flags;
419 flagword sec_flags = 0;
422 if (styp_flags & STYP_NOLOAD)
424 sec_flags |= SEC_NEVER_LOAD;
426 #endif /* STYP_NOLOAD */
428 /* For 386 COFF, at least, an unloadable text or data section is
429 actually a shared library section. */
430 if (styp_flags & STYP_TEXT)
432 if (sec_flags & SEC_NEVER_LOAD)
433 sec_flags |= SEC_CODE | SEC_COFF_SHARED_LIBRARY;
435 sec_flags |= SEC_CODE | SEC_LOAD | SEC_ALLOC;
437 else if (styp_flags & STYP_DATA)
439 if (sec_flags & SEC_NEVER_LOAD)
440 sec_flags |= SEC_DATA | SEC_COFF_SHARED_LIBRARY;
442 sec_flags |= SEC_DATA | SEC_LOAD | SEC_ALLOC;
444 else if (styp_flags & STYP_BSS)
446 #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
447 if (sec_flags & SEC_NEVER_LOAD)
448 sec_flags |= SEC_ALLOC | SEC_COFF_SHARED_LIBRARY;
451 sec_flags |= SEC_ALLOC;
453 else if (styp_flags & STYP_INFO)
455 /* We mark these as SEC_DEBUGGING, but only if COFF_PAGE_SIZE is
456 defined. coff_compute_section_file_positions uses
457 COFF_PAGE_SIZE to ensure that the low order bits of the
458 section VMA and the file offset match. If we don't know
459 COFF_PAGE_SIZE, we can't ensure the correct correspondence,
460 and demand page loading of the file will fail. */
461 #ifdef COFF_PAGE_SIZE
462 sec_flags |= SEC_DEBUGGING;
465 else if (strcmp (name, _TEXT) == 0)
467 if (sec_flags & SEC_NEVER_LOAD)
468 sec_flags |= SEC_CODE | SEC_COFF_SHARED_LIBRARY;
470 sec_flags |= SEC_CODE | SEC_LOAD | SEC_ALLOC;
472 else if (strcmp (name, _DATA) == 0)
474 if (sec_flags & SEC_NEVER_LOAD)
475 sec_flags |= SEC_DATA | SEC_COFF_SHARED_LIBRARY;
477 sec_flags |= SEC_DATA | SEC_LOAD | SEC_ALLOC;
479 else if (strcmp (name, _BSS) == 0)
481 #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
482 if (sec_flags & SEC_NEVER_LOAD)
483 sec_flags |= SEC_ALLOC | SEC_COFF_SHARED_LIBRARY;
486 sec_flags |= SEC_ALLOC;
488 else if (strcmp (name, ".debug") == 0
490 || strcmp (name, _COMMENT) == 0
492 || strncmp (name, ".stab", 5) == 0)
494 #ifdef COFF_PAGE_SIZE
495 sec_flags |= SEC_DEBUGGING;
499 else if (strcmp (name, _LIB) == 0)
503 else if (strcmp (name, _LIT) == 0)
505 sec_flags = SEC_LOAD | SEC_ALLOC | SEC_READONLY;
510 sec_flags |= SEC_ALLOC | SEC_LOAD;
513 #ifdef STYP_LIT /* A29k readonly text/data section type */
514 if ((styp_flags & STYP_LIT) == STYP_LIT)
516 sec_flags = (SEC_LOAD | SEC_ALLOC | SEC_READONLY);
518 #endif /* STYP_LIT */
519 #ifdef STYP_OTHER_LOAD /* Other loaded sections */
520 if (styp_flags & STYP_OTHER_LOAD)
522 sec_flags = (SEC_LOAD | SEC_ALLOC);
524 #endif /* STYP_SDATA */
529 #define get_index(symbol) ((symbol)->udata.i)
533 bfd_coff_backend_data
537 Special entry points for gdb to swap in coff symbol table parts:
540 . void (*_bfd_coff_swap_aux_in) PARAMS ((
549 . void (*_bfd_coff_swap_sym_in) PARAMS ((
554 . void (*_bfd_coff_swap_lineno_in) PARAMS ((
560 Special entry points for gas to swap out coff parts:
562 . unsigned int (*_bfd_coff_swap_aux_out) PARAMS ((
571 . unsigned int (*_bfd_coff_swap_sym_out) PARAMS ((
576 . unsigned int (*_bfd_coff_swap_lineno_out) PARAMS ((
581 . unsigned int (*_bfd_coff_swap_reloc_out) PARAMS ((
586 . unsigned int (*_bfd_coff_swap_filehdr_out) PARAMS ((
591 . unsigned int (*_bfd_coff_swap_aouthdr_out) PARAMS ((
596 . unsigned int (*_bfd_coff_swap_scnhdr_out) PARAMS ((
602 Special entry points for generic COFF routines to call target
603 dependent COFF routines:
605 . unsigned int _bfd_filhsz;
606 . unsigned int _bfd_aoutsz;
607 . unsigned int _bfd_scnhsz;
608 . unsigned int _bfd_symesz;
609 . unsigned int _bfd_auxesz;
610 . unsigned int _bfd_relsz;
611 . unsigned int _bfd_linesz;
612 . boolean _bfd_coff_long_filenames;
613 . void (*_bfd_coff_swap_filehdr_in) PARAMS ((
617 . void (*_bfd_coff_swap_aouthdr_in) PARAMS ((
621 . void (*_bfd_coff_swap_scnhdr_in) PARAMS ((
625 . void (*_bfd_coff_swap_reloc_in) PARAMS ((
629 . boolean (*_bfd_coff_bad_format_hook) PARAMS ((
631 . PTR internal_filehdr));
632 . boolean (*_bfd_coff_set_arch_mach_hook) PARAMS ((
634 . PTR internal_filehdr));
635 . PTR (*_bfd_coff_mkobject_hook) PARAMS ((
637 . PTR internal_filehdr,
638 . PTR internal_aouthdr));
639 . flagword (*_bfd_styp_to_sec_flags_hook) PARAMS ((
641 . PTR internal_scnhdr,
642 . const char *name));
643 . void (*_bfd_set_alignment_hook) PARAMS ((
646 . PTR internal_scnhdr));
647 . boolean (*_bfd_coff_slurp_symbol_table) PARAMS ((
649 . boolean (*_bfd_coff_symname_in_debug) PARAMS ((
651 . struct internal_syment *sym));
652 . boolean (*_bfd_coff_pointerize_aux_hook) PARAMS ((
654 . combined_entry_type *table_base,
655 . combined_entry_type *symbol,
656 . unsigned int indaux,
657 . combined_entry_type *aux));
658 . void (*_bfd_coff_reloc16_extra_cases) PARAMS ((
660 . struct bfd_link_info *link_info,
661 . struct bfd_link_order *link_order,
664 . unsigned int *src_ptr,
665 . unsigned int *dst_ptr));
666 . int (*_bfd_coff_reloc16_estimate) PARAMS ((
668 . asection *input_section,
670 . unsigned int shrink,
671 . struct bfd_link_info *link_info));
672 . boolean (*_bfd_coff_sym_is_global) PARAMS ((
674 . struct internal_syment *));
675 . void (*_bfd_coff_compute_section_file_positions) PARAMS ((
677 . boolean (*_bfd_coff_start_final_link) PARAMS ((
679 . struct bfd_link_info *info));
680 . boolean (*_bfd_coff_relocate_section) PARAMS ((
682 . struct bfd_link_info *info,
684 . asection *input_section,
685 . bfd_byte *contents,
686 . struct internal_reloc *relocs,
687 . struct internal_syment *syms,
688 . asection **sections));
689 . reloc_howto_type *(*_bfd_coff_rtype_to_howto) PARAMS ((
692 . struct internal_reloc *rel,
693 . struct coff_link_hash_entry *h,
694 . struct internal_syment *sym,
695 . bfd_vma *addendp));
696 . boolean (*_bfd_coff_adjust_symndx) PARAMS ((
698 . struct bfd_link_info *info,
701 . struct internal_reloc *reloc,
702 . boolean *adjustedp));
704 .} bfd_coff_backend_data;
706 .#define coff_backend_info(abfd) ((bfd_coff_backend_data *) (abfd)->xvec->backend_data)
708 .#define bfd_coff_swap_aux_in(a,e,t,c,ind,num,i) \
709 . ((coff_backend_info (a)->_bfd_coff_swap_aux_in) (a,e,t,c,ind,num,i))
711 .#define bfd_coff_swap_sym_in(a,e,i) \
712 . ((coff_backend_info (a)->_bfd_coff_swap_sym_in) (a,e,i))
714 .#define bfd_coff_swap_lineno_in(a,e,i) \
715 . ((coff_backend_info ( a)->_bfd_coff_swap_lineno_in) (a,e,i))
717 .#define bfd_coff_swap_reloc_out(abfd, i, o) \
718 . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_out) (abfd, i, o))
720 .#define bfd_coff_swap_lineno_out(abfd, i, o) \
721 . ((coff_backend_info (abfd)->_bfd_coff_swap_lineno_out) (abfd, i, o))
723 .#define bfd_coff_swap_aux_out(a,i,t,c,ind,num,o) \
724 . ((coff_backend_info (a)->_bfd_coff_swap_aux_out) (a,i,t,c,ind,num,o))
726 .#define bfd_coff_swap_sym_out(abfd, i,o) \
727 . ((coff_backend_info (abfd)->_bfd_coff_swap_sym_out) (abfd, i, o))
729 .#define bfd_coff_swap_scnhdr_out(abfd, i,o) \
730 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_out) (abfd, i, o))
732 .#define bfd_coff_swap_filehdr_out(abfd, i,o) \
733 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_out) (abfd, i, o))
735 .#define bfd_coff_swap_aouthdr_out(abfd, i,o) \
736 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_out) (abfd, i, o))
738 .#define bfd_coff_filhsz(abfd) (coff_backend_info (abfd)->_bfd_filhsz)
739 .#define bfd_coff_aoutsz(abfd) (coff_backend_info (abfd)->_bfd_aoutsz)
740 .#define bfd_coff_scnhsz(abfd) (coff_backend_info (abfd)->_bfd_scnhsz)
741 .#define bfd_coff_symesz(abfd) (coff_backend_info (abfd)->_bfd_symesz)
742 .#define bfd_coff_auxesz(abfd) (coff_backend_info (abfd)->_bfd_auxesz)
743 .#define bfd_coff_relsz(abfd) (coff_backend_info (abfd)->_bfd_relsz)
744 .#define bfd_coff_linesz(abfd) (coff_backend_info (abfd)->_bfd_linesz)
745 .#define bfd_coff_long_filenames(abfd) (coff_backend_info (abfd)->_bfd_coff_long_filenames)
746 .#define bfd_coff_swap_filehdr_in(abfd, i,o) \
747 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_in) (abfd, i, o))
749 .#define bfd_coff_swap_aouthdr_in(abfd, i,o) \
750 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_in) (abfd, i, o))
752 .#define bfd_coff_swap_scnhdr_in(abfd, i,o) \
753 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_in) (abfd, i, o))
755 .#define bfd_coff_swap_reloc_in(abfd, i, o) \
756 . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_in) (abfd, i, o))
758 .#define bfd_coff_bad_format_hook(abfd, filehdr) \
759 . ((coff_backend_info (abfd)->_bfd_coff_bad_format_hook) (abfd, filehdr))
761 .#define bfd_coff_set_arch_mach_hook(abfd, filehdr)\
762 . ((coff_backend_info (abfd)->_bfd_coff_set_arch_mach_hook) (abfd, filehdr))
763 .#define bfd_coff_mkobject_hook(abfd, filehdr, aouthdr)\
764 . ((coff_backend_info (abfd)->_bfd_coff_mkobject_hook) (abfd, filehdr, aouthdr))
766 .#define bfd_coff_styp_to_sec_flags_hook(abfd, scnhdr, name)\
767 . ((coff_backend_info (abfd)->_bfd_styp_to_sec_flags_hook) (abfd, scnhdr, name))
769 .#define bfd_coff_set_alignment_hook(abfd, sec, scnhdr)\
770 . ((coff_backend_info (abfd)->_bfd_set_alignment_hook) (abfd, sec, scnhdr))
772 .#define bfd_coff_slurp_symbol_table(abfd)\
773 . ((coff_backend_info (abfd)->_bfd_coff_slurp_symbol_table) (abfd))
775 .#define bfd_coff_symname_in_debug(abfd, sym)\
776 . ((coff_backend_info (abfd)->_bfd_coff_symname_in_debug) (abfd, sym))
778 .#define bfd_coff_reloc16_extra_cases(abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr)\
779 . ((coff_backend_info (abfd)->_bfd_coff_reloc16_extra_cases)\
780 . (abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr))
782 .#define bfd_coff_reloc16_estimate(abfd, section, reloc, shrink, link_info)\
783 . ((coff_backend_info (abfd)->_bfd_coff_reloc16_estimate)\
784 . (abfd, section, reloc, shrink, link_info))
786 .#define bfd_coff_sym_is_global(abfd, sym)\
787 . ((coff_backend_info (abfd)->_bfd_coff_sym_is_global)\
790 .#define bfd_coff_compute_section_file_positions(abfd)\
791 . ((coff_backend_info (abfd)->_bfd_coff_compute_section_file_positions)\
794 .#define bfd_coff_start_final_link(obfd, info)\
795 . ((coff_backend_info (obfd)->_bfd_coff_start_final_link)\
797 .#define bfd_coff_relocate_section(obfd,info,ibfd,o,con,rel,isyms,secs)\
798 . ((coff_backend_info (ibfd)->_bfd_coff_relocate_section)\
799 . (obfd, info, ibfd, o, con, rel, isyms, secs))
800 .#define bfd_coff_rtype_to_howto(abfd, sec, rel, h, sym, addendp)\
801 . ((coff_backend_info (abfd)->_bfd_coff_rtype_to_howto)\
802 . (abfd, sec, rel, h, sym, addendp))
803 .#define bfd_coff_adjust_symndx(obfd, info, ibfd, sec, rel, adjustedp)\
804 . ((coff_backend_info (abfd)->_bfd_coff_adjust_symndx)\
805 . (obfd, info, ibfd, sec, rel, adjustedp))
809 /* See whether the magic number matches. */
812 coff_bad_format_hook (abfd, filehdr)
816 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
818 if (BADMAG (*internal_f))
821 /* if the optional header is NULL or not the correct size then
822 quit; the only difference I can see between m88k dgux headers (MC88DMAGIC)
823 and Intel 960 readwrite headers (I960WRMAGIC) is that the
824 optional header is of a different size.
826 But the mips keeps extra stuff in it's opthdr, so dont check
830 #if defined(M88) || defined(I960)
831 if (internal_f->f_opthdr != 0 && AOUTSZ != internal_f->f_opthdr)
839 initialize a section structure with information peculiar to this
840 particular implementation of coff
844 coff_new_section_hook (abfd, section)
848 section->alignment_power = COFF_DEFAULT_SECTION_ALIGNMENT_POWER;
850 /* Allocate aux records for section symbols, to store size and
853 @@ Shouldn't use constant multiplier here! */
854 coffsymbol (section->symbol)->native =
855 (combined_entry_type *) bfd_zalloc (abfd,
856 sizeof (combined_entry_type) * 10);
858 /* The .stab section must be aligned to 2**2 at most, because
859 otherwise there may be gaps in the section which gdb will not
860 know how to interpret. Examining the section name is a hack, but
861 that is also how gdb locates the section.
862 We need to handle the .ctors and .dtors sections similarly, to
863 avoid introducing null words in the tables. */
864 if (COFF_DEFAULT_SECTION_ALIGNMENT_POWER > 2
865 && (strncmp (section->name, ".stab", 5) == 0
866 || strcmp (section->name, ".ctors") == 0
867 || strcmp (section->name, ".dtors") == 0))
868 section->alignment_power = 2;
875 /* Set the alignment of a BFD section. */
878 coff_set_alignment_hook (abfd, section, scnhdr)
883 struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr;
886 for (i = 0; i < 32; i++)
887 if ((1 << i) >= hdr->s_align)
889 section->alignment_power = i;
894 #define coff_set_alignment_hook \
895 ((void (*) PARAMS ((bfd *, asection *, PTR))) bfd_void)
899 #ifndef coff_mkobject
904 coff_data_type *coff;
906 abfd->tdata.coff_obj_data = (struct coff_tdata *) bfd_zalloc (abfd, sizeof (coff_data_type));
907 if (abfd->tdata.coff_obj_data == 0)
909 bfd_set_error (bfd_error_no_memory);
912 coff = coff_data (abfd);
913 coff->symbols = (coff_symbol_type *) NULL;
914 coff->conversion_table = (unsigned int *) NULL;
915 coff->raw_syments = (struct coff_ptr_struct *) NULL;
917 /* make_abs_section(abfd);*/
923 /* Create the COFF backend specific information. */
924 #ifndef coff_mkobject_hook
926 coff_mkobject_hook (abfd, filehdr, aouthdr)
931 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
932 coff_data_type *coff;
934 if (coff_mkobject (abfd) == false)
937 coff = coff_data (abfd);
939 coff->sym_filepos = internal_f->f_symptr;
941 /* These members communicate important constants about the symbol
942 table to GDB's symbol-reading code. These `constants'
943 unfortunately vary among coff implementations... */
944 coff->local_n_btmask = N_BTMASK;
945 coff->local_n_btshft = N_BTSHFT;
946 coff->local_n_tmask = N_TMASK;
947 coff->local_n_tshift = N_TSHIFT;
948 coff->local_symesz = SYMESZ;
949 coff->local_auxesz = AUXESZ;
950 coff->local_linesz = LINESZ;
952 obj_raw_syment_count (abfd) =
953 obj_conv_table_size (abfd) =
960 /* Determine the machine architecture and type. FIXME: This is target
961 dependent because the magic numbers are defined in the target
962 dependent header files. But there is no particular need for this.
963 If the magic numbers were moved to a separate file, this function
964 would be target independent and would also be much more successful
965 at linking together COFF files for different architectures. */
968 coff_set_arch_mach_hook (abfd, filehdr)
973 enum bfd_architecture arch;
974 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
977 switch (internal_f->f_magic)
981 arch = bfd_arch_powerpc;
982 machine = 0; /* what does this mean? (krk) */
988 case I386AIXMAGIC: /* Danbury PS/2 AIX C Compiler */
989 case LYNXCOFFMAGIC: /* shadows the m68k Lynx number below, sigh */
990 arch = bfd_arch_i386;
994 #ifdef A29K_MAGIC_BIG
996 case A29K_MAGIC_LITTLE:
997 arch = bfd_arch_a29k;
1003 arch = bfd_arch_arm;
1010 #ifdef MC68KBCSMAGIC
1013 #ifdef APOLLOM68KMAGIC
1014 case APOLLOM68KMAGIC:
1016 #ifdef LYNXCOFFMAGIC
1019 arch = bfd_arch_m68k;
1027 arch = bfd_arch_m88k;
1033 arch = bfd_arch_z8k;
1034 switch (internal_f->f_flags & F_MACHMASK)
1037 machine = bfd_mach_z8001;
1040 machine = bfd_mach_z8002;
1051 arch = bfd_arch_i960;
1052 switch (F_I960TYPE & internal_f->f_flags)
1056 machine = bfd_mach_i960_core;
1059 machine = bfd_mach_i960_kb_sb;
1062 machine = bfd_mach_i960_mc;
1065 machine = bfd_mach_i960_xa;
1068 machine = bfd_mach_i960_ca;
1071 machine = bfd_mach_i960_ka_sa;
1073 /* start-sanitize-i960xl */
1075 machine = bfd_mach_i960_xl;
1077 /* end-sanitize-i960xl */
1088 /* PowerPC Macs use the same magic numbers as RS/6000 (because
1089 that's how they were bootstrapped originally), but they are
1090 always PowerPC architecture. */
1091 arch = bfd_arch_powerpc;
1094 /* FIXME The architecture and machine can now (as of AIX 4.1) be
1095 identified by looking at fields in the a.out header. */
1096 arch = bfd_arch_rs6000;
1098 #endif /* POWERMAC */
1104 arch = bfd_arch_we32k;
1111 arch = bfd_arch_h8300;
1112 machine = bfd_mach_h8300;
1113 /* !! FIXME this probably isn't the right place for this */
1114 abfd->flags |= BFD_IS_RELAXABLE;
1120 arch = bfd_arch_h8300;
1121 machine = bfd_mach_h8300h;
1122 /* !! FIXME this probably isn't the right place for this */
1123 abfd->flags |= BFD_IS_RELAXABLE;
1127 #ifdef SH_ARCH_MAGIC_BIG
1128 case SH_ARCH_MAGIC_BIG:
1129 case SH_ARCH_MAGIC_LITTLE:
1137 arch = bfd_arch_h8500;
1144 #ifdef LYNXCOFFMAGIC
1147 arch = bfd_arch_sparc;
1152 default: /* Unreadable input file type */
1153 arch = bfd_arch_obscure;
1157 bfd_default_set_arch_mach (abfd, arch, machine);
1161 #ifdef SYMNAME_IN_DEBUG
1164 symname_in_debug_hook (abfd, sym)
1166 struct internal_syment *sym;
1168 return SYMNAME_IN_DEBUG (sym) ? true : false;
1173 #define symname_in_debug_hook \
1174 (boolean (*) PARAMS ((bfd *, struct internal_syment *))) bfd_false
1180 /* We don't want to pointerize the csect auxent of a C_EXT or C_HIDEXT
1183 static boolean coff_pointerize_aux_hook
1184 PARAMS ((bfd *, combined_entry_type *, combined_entry_type *,
1185 unsigned int, combined_entry_type *));
1189 coff_pointerize_aux_hook (abfd, table_base, symbol, indaux, aux)
1191 combined_entry_type *table_base;
1192 combined_entry_type *symbol;
1193 unsigned int indaux;
1194 combined_entry_type *aux;
1196 int class = symbol->u.syment.n_sclass;
1198 /* Return true if we don't want to pointerize this aux entry, which
1199 is the case for the last aux entry for a C_EXT or C_HIDEXT
1201 return ((class == C_EXT || class == C_HIDEXT)
1202 && indaux + 1 == symbol->u.syment.n_numaux);
1208 /* We don't want to pointerize bal entries. */
1210 static boolean coff_pointerize_aux_hook
1211 PARAMS ((bfd *, combined_entry_type *, combined_entry_type *,
1212 unsigned int, combined_entry_type *));
1216 coff_pointerize_aux_hook (abfd, table_base, symbol, indaux, aux)
1218 combined_entry_type *table_base;
1219 combined_entry_type *symbol;
1220 unsigned int indaux;
1221 combined_entry_type *aux;
1223 /* Return true if we don't want to pointerize this aux entry, which
1224 is the case for the lastfirst aux entry for a C_LEAFPROC symbol. */
1225 return indaux == 1 && symbol->u.syment.n_sclass == C_LEAFPROC;
1230 #define coff_pointerize_aux_hook 0
1233 #endif /* ! RS6000COFF_C */
1239 To write relocations, the back end steps though the
1240 canonical relocation table and create an
1241 @code{internal_reloc}. The symbol index to use is removed from
1242 the @code{offset} field in the symbol table supplied. The
1243 address comes directly from the sum of the section base
1244 address and the relocation offset; the type is dug directly
1245 from the howto field. Then the @code{internal_reloc} is
1246 swapped into the shape of an @code{external_reloc} and written
1252 coff_write_relocs (abfd, first_undef)
1257 for (s = abfd->sections; s != (asection *) NULL; s = s->next)
1260 struct external_reloc dst;
1262 arelent **p = s->orelocation;
1263 if (bfd_seek (abfd, s->rel_filepos, SEEK_SET) != 0)
1265 for (i = 0; i < s->reloc_count; i++)
1267 struct internal_reloc n;
1269 memset ((PTR) & n, 0, sizeof (n));
1271 /* Now we've renumbered the symbols we know where the
1272 undefined symbols live in the table. Check the reloc
1273 entries for symbols who's output bfd isn't the right one.
1274 This is because the symbol was undefined (which means
1275 that all the pointers are never made to point to the same
1276 place). This is a bad thing,'cause the symbols attached
1277 to the output bfd are indexed, so that the relocation
1278 entries know which symbol index they point to. So we
1279 have to look up the output symbol here. */
1281 if (q->sym_ptr_ptr[0]->the_bfd != abfd)
1284 const char *sname = q->sym_ptr_ptr[0]->name;
1285 asymbol **outsyms = abfd->outsymbols;
1286 for (i = first_undef; outsyms[i]; i++)
1288 const char *intable = outsyms[i]->name;
1289 if (strcmp (intable, sname) == 0) {
1290 /* got a hit, so repoint the reloc */
1291 q->sym_ptr_ptr = outsyms + i;
1297 n.r_vaddr = q->address + s->vma;
1300 /* The 29k const/consth reloc pair is a real kludge. The consth
1301 part doesn't have a symbol; it has an offset. So rebuilt
1303 if (q->howto->type == R_IHCONST)
1304 n.r_symndx = q->addend;
1309 if (q->sym_ptr_ptr == bfd_abs_section_ptr->symbol_ptr_ptr)
1310 /* This is a relocation relative to the absolute symbol. */
1314 n.r_symndx = get_index ((*(q->sym_ptr_ptr)));
1315 /* Take notice if the symbol reloc points to a symbol
1316 we don't have in our symbol table. What should we
1318 if (n.r_symndx > obj_conv_table_size (abfd))
1323 #ifdef SWAP_OUT_RELOC_OFFSET
1324 n.r_offset = q->addend;
1328 /* Work out reloc type from what is required */
1329 SELECT_RELOC (n, q->howto);
1331 n.r_type = q->howto->type;
1333 coff_swap_reloc_out (abfd, &n, &dst);
1334 if (bfd_write ((PTR) & dst, 1, RELSZ, abfd) != RELSZ)
1342 /* Set flags and magic number of a coff file from architecture and machine
1343 type. Result is true if we can represent the arch&type, false if not. */
1346 coff_set_flags (abfd, magicp, flagsp)
1349 unsigned short *flagsp;
1351 switch (bfd_get_arch (abfd))
1356 switch (bfd_get_mach (abfd))
1358 case bfd_mach_z8001:
1361 case bfd_mach_z8002:
1375 *magicp = I960ROMAGIC;
1377 ((bfd_get_file_flags(abfd) & WP_TEXT) ? I960ROMAGIC :
1378 I960RWMAGIC); FIXME???
1380 switch (bfd_get_mach (abfd))
1382 case bfd_mach_i960_core:
1385 case bfd_mach_i960_kb_sb:
1388 case bfd_mach_i960_mc:
1391 case bfd_mach_i960_xa:
1394 case bfd_mach_i960_ca:
1397 case bfd_mach_i960_ka_sa:
1400 /* start-sanitize-i960xl */
1401 case bfd_mach_i960_xl:
1404 /* end-sanitize-i960xl */
1419 case bfd_arch_powerpc:
1426 *magicp = I386MAGIC;
1428 /* Just overwrite the usual value if we're doing Lynx. */
1429 *magicp = LYNXCOFFMAGIC;
1436 #ifdef APOLLOM68KMAGIC
1437 *magicp = APOLLO_COFF_VERSION_NUMBER;
1439 *magicp = MC68MAGIC;
1442 /* Just overwrite the usual value if we're doing Lynx. */
1443 *magicp = LYNXCOFFMAGIC;
1451 *magicp = MC88OMAGIC;
1456 case bfd_arch_h8300:
1457 switch (bfd_get_mach (abfd))
1459 case bfd_mach_h8300:
1460 *magicp = H8300MAGIC;
1462 case bfd_mach_h8300h:
1463 *magicp = H8300HMAGIC;
1469 #ifdef SH_ARCH_MAGIC_BIG
1471 if (abfd->xvec->byteorder_big_p)
1472 *magicp = SH_ARCH_MAGIC_BIG;
1474 *magicp = SH_ARCH_MAGIC_LITTLE;
1480 case bfd_arch_sparc:
1481 *magicp = SPARCMAGIC;
1483 /* Just overwrite the usual value if we're doing Lynx. */
1484 *magicp = LYNXCOFFMAGIC;
1491 case bfd_arch_h8500:
1492 *magicp = H8500MAGIC;
1496 #ifdef A29K_MAGIC_BIG
1498 if (abfd->xvec->byteorder_big_p)
1499 *magicp = A29K_MAGIC_BIG;
1501 *magicp = A29K_MAGIC_LITTLE;
1507 case bfd_arch_we32k:
1508 *magicp = WE32KMAGIC;
1514 case bfd_arch_rs6000:
1516 case bfd_arch_powerpc:
1518 *magicp = U802TOCMAGIC;
1523 default: /* Unknown architecture */
1524 /* return false; -- fall through to "return false" below, to avoid
1525 "statement never reached" errors on the one below. */
1534 coff_set_arch_mach (abfd, arch, machine)
1536 enum bfd_architecture arch;
1537 unsigned long machine;
1540 unsigned short dummy2;
1542 if (! bfd_default_set_arch_mach (abfd, arch, machine))
1545 if (arch != bfd_arch_unknown &&
1546 coff_set_flags (abfd, &dummy1, &dummy2) != true)
1547 return false; /* We can't represent this type */
1549 return true; /* We're easy ... */
1553 /* Calculate the file position for each section. */
1556 coff_compute_section_file_positions (abfd)
1560 asection *previous = (asection *) NULL;
1561 file_ptr sofar = FILHSZ;
1569 #ifdef COFF_IMAGE_WITH_PE
1571 if (coff_data (abfd)->link_info)
1573 page_size = pe_data (abfd)->pe_opthdr.FileAlignment;
1576 page_size = PE_DEF_FILE_ALIGNMENT;
1577 #elif defined (COFF_PAGE_SIZE)
1578 int page_size = COFF_PAGE_SIZE;
1581 if (bfd_get_start_address (abfd))
1583 /* A start address may have been added to the original file. In this
1584 case it will need an optional header to record it. */
1585 abfd->flags |= EXEC_P;
1588 if (abfd->flags & EXEC_P)
1591 sofar += abfd->section_count * SCNHSZ;
1592 for (current = abfd->sections, count = 1;
1593 current != (asection *) NULL;
1594 current = current->next, ++count)
1596 current->target_index = count;
1598 /* Only deal with sections which have contents */
1599 if (!(current->flags & SEC_HAS_CONTENTS))
1603 /* Do not include the .junk section. This is where we collect section
1604 data which we don't need. This is mainly the MS .debug$ data which
1605 stores codeview debug data. */
1606 if (strcmp (current->name, ".junk") == 0)
1612 /* Align the sections in the file to the same boundary on
1613 which they are aligned in virtual memory. I960 doesn't
1614 do this (FIXME) so we can stay in sync with Intel. 960
1615 doesn't yet page from files... */
1618 /* make sure this section is aligned on the right boundary - by
1619 padding the previous section up if necessary */
1622 sofar = BFD_ALIGN (sofar, 1 << current->alignment_power);
1623 if (previous != (asection *) NULL)
1625 previous->_raw_size += sofar - old_sofar;
1631 /* In demand paged files the low order bits of the file offset
1632 must match the low order bits of the virtual address. */
1633 #ifdef COFF_PAGE_SIZE
1634 if ((abfd->flags & D_PAGED) != 0
1635 && (current->flags & SEC_ALLOC) != 0)
1636 sofar += (current->vma - sofar) % page_size;
1638 current->filepos = sofar;
1640 #ifdef COFF_IMAGE_WITH_PE
1641 /* With PE we have to pad each section to be a multiple of its page size
1642 too, and remember both sizes. Cooked_size becomes very useful. */
1643 current->_cooked_size = current->_raw_size;
1644 current->_raw_size = (current->_raw_size + page_size -1) & -page_size;
1647 sofar += current->_raw_size;
1650 /* make sure that this section is of the right size too */
1652 sofar = BFD_ALIGN (sofar, 1 << current->alignment_power);
1653 current->_raw_size += sofar - old_sofar;
1657 /* Force .lib sections to start at zero. The vma is then
1658 incremented in coff_set_section_contents. This is right for
1660 if (strcmp (current->name, _LIB) == 0)
1661 bfd_set_section_vma (abfd, current, 0);
1667 obj_relocbase (abfd) = sofar;
1668 abfd->output_has_begun = true;
1672 #ifndef RS6000COFF_C
1674 /* If .file, .text, .data, .bss symbols are missing, add them. */
1675 /* @@ Should we only be adding missing symbols, or overriding the aux
1676 values for existing section symbols? */
1678 coff_add_missing_symbols (abfd)
1681 unsigned int nsyms = bfd_get_symcount (abfd);
1682 asymbol **sympp = abfd->outsymbols;
1685 int need_text = 1, need_data = 1, need_bss = 1, need_file = 1;
1687 for (i = 0; i < nsyms; i++)
1689 coff_symbol_type *csym = coff_symbol_from (abfd, sympp[i]);
1693 /* only do this if there is a coff representation of the input
1695 if (csym->native && csym->native->u.syment.n_sclass == C_FILE)
1700 name = csym->symbol.name;
1703 if (!strcmp (name, _TEXT))
1706 else if (!strcmp (name, ".wtext"))
1709 else if (!strcmp (name, _DATA))
1711 else if (!strcmp (name, _BSS))
1715 /* Now i == bfd_get_symcount (abfd). */
1716 /* @@ For now, don't deal with .file symbol. */
1719 if (!need_text && !need_data && !need_bss && !need_file)
1721 nsyms += need_text + need_data + need_bss + need_file;
1722 sympp2 = (asymbol **) bfd_alloc_by_size_t (abfd, nsyms * sizeof (asymbol *));
1725 bfd_set_error (bfd_error_no_memory);
1728 memcpy (sympp2, sympp, i * sizeof (asymbol *));
1731 /* @@ Generate fake .file symbol, in sympp2[i], and increment i. */
1735 sympp2[i++] = coff_section_symbol (abfd, _TEXT);
1737 sympp2[i++] = coff_section_symbol (abfd, _DATA);
1739 sympp2[i++] = coff_section_symbol (abfd, _BSS);
1740 BFD_ASSERT (i == nsyms);
1741 bfd_set_symtab (abfd, sympp2, nsyms);
1745 #endif /* ! defined (RS6000COFF_C) */
1752 coff_write_object_contents (abfd)
1756 boolean hasrelocs = false;
1757 boolean haslinno = false;
1758 file_ptr reloc_base;
1759 file_ptr lineno_base;
1761 unsigned long reloc_size = 0;
1762 unsigned long lnno_size = 0;
1763 asection *text_sec = NULL;
1764 asection *data_sec = NULL;
1765 asection *bss_sec = NULL;
1767 struct internal_filehdr internal_f;
1768 struct internal_aouthdr internal_a;
1770 bfd_set_error (bfd_error_system_call);
1772 if (abfd->output_has_begun == false)
1773 coff_compute_section_file_positions (abfd);
1775 reloc_base = obj_relocbase (abfd);
1777 /* Make a pass through the symbol table to count line number entries and
1778 put them into the correct asections */
1780 lnno_size = coff_count_linenumbers (abfd) * LINESZ;
1782 /* Work out the size of the reloc and linno areas */
1784 for (current = abfd->sections; current != NULL; current =
1786 reloc_size += current->reloc_count * RELSZ;
1788 lineno_base = reloc_base + reloc_size;
1789 sym_base = lineno_base + lnno_size;
1791 /* Indicate in each section->line_filepos its actual file address */
1792 for (current = abfd->sections; current != NULL; current =
1795 if (current->lineno_count)
1797 current->line_filepos = lineno_base;
1798 current->moving_line_filepos = lineno_base;
1799 lineno_base += current->lineno_count * LINESZ;
1803 current->line_filepos = 0;
1805 if (current->reloc_count)
1807 current->rel_filepos = reloc_base;
1808 reloc_base += current->reloc_count * RELSZ;
1812 current->rel_filepos = 0;
1816 /* Write section headers to the file. */
1817 internal_f.f_nscns = 0;
1820 (file_ptr) ((abfd->flags & EXEC_P) ?
1821 (FILHSZ + AOUTSZ) : FILHSZ),
1825 for (current = abfd->sections;
1827 current = current->next)
1829 struct internal_scnhdr section;
1832 /* Do not include the .junk section. This is where we collect section
1833 data which we don't need. This is mainly the MS .debug$ data which
1834 stores codeview debug data. */
1835 if (strcmp (current->name, ".junk") == 0)
1840 /* If we've got a .reloc section, remember. */
1842 if (strcmp (current->name, ".reloc") == 0)
1844 pe_data (abfd)->has_reloc_section = 1;
1847 internal_f.f_nscns++;
1848 strncpy (&(section.s_name[0]), current->name, 8);
1850 /* Always set s_vaddr of .lib to 0. This is right for SVR3.2
1851 Ian Taylor <ian@cygnus.com>. */
1852 if (strcmp (current->name, _LIB) == 0)
1853 section.s_vaddr = 0;
1856 section.s_vaddr = current->lma;
1857 section.s_paddr = current->lma;
1858 section.s_size = current->_raw_size;
1861 section.s_paddr = current->_cooked_size;
1865 If this section has no size or is unloadable then the scnptr
1868 if (current->_raw_size == 0 ||
1869 (current->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
1871 section.s_scnptr = 0;
1875 section.s_scnptr = current->filepos;
1877 section.s_relptr = current->rel_filepos;
1878 section.s_lnnoptr = current->line_filepos;
1879 section.s_nreloc = current->reloc_count;
1880 section.s_nlnno = current->lineno_count;
1881 if (current->reloc_count != 0)
1883 if (current->lineno_count != 0)
1886 section.s_flags = sec_to_styp_flags (current->name, current->flags);
1888 if (!strcmp (current->name, _TEXT))
1892 else if (!strcmp (current->name, _DATA))
1896 else if (!strcmp (current->name, _BSS))
1902 section.s_align = (current->alignment_power
1903 ? 1 << current->alignment_power
1908 #ifdef COFF_IMAGE_WITH_PE
1909 /* suppress output of the sections if they are null. ld includes
1910 the bss and data sections even if there is no size assigned
1911 to them. NT loader doesn't like it if these section headers are
1912 included if the sections themselves are not needed */
1913 if (section.s_size == 0)
1914 internal_f.f_nscns--;
1919 if (coff_swap_scnhdr_out (abfd, §ion, &buff) == 0
1920 || bfd_write ((PTR) (&buff), 1, SCNHSZ, abfd) != SCNHSZ)
1927 /* OK, now set up the filehdr... */
1929 /* Don't include the internal abs section in the section count */
1932 We will NOT put a fucking timestamp in the header here. Every time you
1933 put it back, I will come in and take it out again. I'm sorry. This
1934 field does not belong here. We fill it with a 0 so it compares the
1935 same but is not a reasonable time. -- gnu@cygnus.com
1937 internal_f.f_timdat = 0;
1939 internal_f.f_flags = 0;
1941 if (abfd->flags & EXEC_P)
1942 internal_f.f_opthdr = AOUTSZ;
1944 internal_f.f_opthdr = 0;
1947 internal_f.f_flags |= F_RELFLG;
1949 internal_f.f_flags |= F_LNNO;
1950 if (abfd->flags & EXEC_P)
1951 internal_f.f_flags |= F_EXEC;
1953 if (!abfd->xvec->byteorder_big_p)
1954 internal_f.f_flags |= F_AR32WR;
1956 internal_f.f_flags |= F_AR32W;
1959 FIXME, should do something about the other byte orders and
1963 memset (&internal_a, 0, sizeof internal_a);
1965 /* Set up architecture-dependent stuff */
1968 unsigned int magic = 0;
1969 unsigned short flags = 0;
1970 coff_set_flags (abfd, &magic, &flags);
1971 internal_f.f_magic = magic;
1972 internal_f.f_flags |= flags;
1973 /* ...and the "opt"hdr... */
1976 #ifdef ULTRA3 /* NYU's machine */
1977 /* FIXME: This is a bogus check. I really want to see if there
1978 * is a .shbss or a .shdata section, if so then set the magic
1979 * number to indicate a shared data executable.
1981 if (internal_f.f_nscns >= 7)
1982 internal_a.magic = SHMAGIC; /* Shared magic */
1985 internal_a.magic = NMAGIC; /* Assume separate i/d */
1986 #define __A_MAGIC_SET__
1989 internal_a.magic = (magic == I960ROMAGIC ? NMAGIC : OMAGIC);
1990 #define __A_MAGIC_SET__
1993 #define __A_MAGIC_SET__
1994 internal_a.magic = PAGEMAGICBCS;
1998 #define __A_MAGIC_SET__
1999 internal_a.magic = APOLLO_COFF_VERSION_NUMBER;
2002 #if defined(M68) || defined(WE32K) || defined(M68K)
2003 #define __A_MAGIC_SET__
2005 internal_a.magic = LYNXCOFFMAGIC;
2007 #endif /* M68 || WE32K || M68K */
2010 #define __A_MAGIC_SET__
2011 internal_a.magic = ZMAGIC;
2014 #define __A_MAGIC_SET__
2015 internal_a.magic = PPCMAGIC;
2018 #define __A_MAGIC_SET__
2020 internal_a.magic = LYNXCOFFMAGIC;
2022 internal_a.magic = ZMAGIC;
2027 #define __A_MAGIC_SET__
2029 internal_a.magic = LYNXCOFFMAGIC;
2034 #define __A_MAGIC_SET__
2035 internal_a.magic = (abfd->flags & D_PAGED) ? RS6K_AOUTHDR_ZMAGIC :
2036 (abfd->flags & WP_TEXT) ? RS6K_AOUTHDR_NMAGIC :
2037 RS6K_AOUTHDR_OMAGIC;
2040 #ifndef __A_MAGIC_SET__
2041 #include "Your aouthdr magic number is not being set!"
2043 #undef __A_MAGIC_SET__
2047 /* FIXME: Does anybody ever set this to another value? */
2048 internal_a.vstamp = 0;
2050 /* Now should write relocs, strings, syms */
2051 obj_sym_filepos (abfd) = sym_base;
2053 if (bfd_get_symcount (abfd) != 0)
2056 #ifndef RS6000COFF_C
2057 if (!coff_add_missing_symbols (abfd))
2060 if (!coff_renumber_symbols (abfd, &firstundef))
2062 coff_mangle_symbols (abfd);
2063 if (! coff_write_symbols (abfd))
2065 if (! coff_write_linenumbers (abfd))
2067 if (! coff_write_relocs (abfd, firstundef))
2071 /* If bfd_get_symcount (abfd) != 0, then we are not using the COFF
2072 backend linker, and obj_raw_syment_count is not valid until after
2073 coff_write_symbols is called. */
2074 if (obj_raw_syment_count (abfd) != 0)
2075 internal_f.f_symptr = sym_base;
2078 internal_f.f_symptr = 0;
2079 internal_f.f_flags |= F_LSYMS;
2084 internal_a.tsize = bfd_get_section_size_before_reloc (text_sec);
2085 internal_a.text_start = internal_a.tsize ? text_sec->vma : 0;
2089 internal_a.dsize = bfd_get_section_size_before_reloc (data_sec);
2090 internal_a.data_start = internal_a.dsize ? data_sec->vma : 0;
2094 internal_a.bsize = bfd_get_section_size_before_reloc (bss_sec);
2097 internal_a.entry = bfd_get_start_address (abfd);
2098 internal_f.f_nsyms = obj_raw_syment_count (abfd);
2100 /* now write them */
2101 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
2105 coff_swap_filehdr_out (abfd, (PTR) & internal_f, (PTR) & buff);
2106 if (bfd_write ((PTR) & buff, 1, FILHSZ, abfd) != FILHSZ)
2109 if (abfd->flags & EXEC_P)
2112 coff_swap_aouthdr_out (abfd, (PTR) & internal_a, (PTR) & buff);
2113 if (bfd_write ((PTR) & buff, 1, AOUTSZ, abfd) != AOUTSZ)
2121 coff_set_section_contents (abfd, section, location, offset, count)
2126 bfd_size_type count;
2128 if (abfd->output_has_begun == false) /* set by bfd.c handler */
2129 coff_compute_section_file_positions (abfd);
2132 /* If this is a .lib section, bump the vma address so that it
2133 winds up being the number of .lib sections output. This is
2134 right for SVR3.2. Shared libraries should probably get more
2135 generic support. Ian Taylor <ian@cygnus.com>. */
2136 if (strcmp (section->name, _LIB) == 0)
2140 /* Don't write out bss sections - one way to do this is to
2141 see if the filepos has not been set. */
2142 if (section->filepos == 0)
2145 if (bfd_seek (abfd, (file_ptr) (section->filepos + offset), SEEK_SET) != 0)
2150 return (bfd_write (location, 1, count, abfd) == count) ? true : false;
2156 coff_close_and_cleanup (abfd)
2159 if (!bfd_read_p (abfd))
2160 switch (abfd->format)
2163 if (!_bfd_write_archive_contents (abfd))
2167 if (!coff_write_object_contents (abfd))
2171 bfd_set_error (bfd_error_invalid_operation);
2175 /* We depend on bfd_close to free all the memory on the obstack. */
2176 /* FIXME if bfd_release is not using obstacks! */
2183 buy_and_read (abfd, where, seek_direction, size)
2189 PTR area = (PTR) bfd_alloc (abfd, size);
2192 bfd_set_error (bfd_error_no_memory);
2195 if (bfd_seek (abfd, where, seek_direction) != 0
2196 || bfd_read (area, 1, size, abfd) != size)
2199 } /* buy_and_read() */
2205 Creating the linenumber table is done by reading in the entire
2206 coff linenumber table, and creating another table for internal use.
2208 A coff linenumber table is structured so that each function
2209 is marked as having a line number of 0. Each line within the
2210 function is an offset from the first line in the function. The
2211 base of the line number information for the table is stored in
2212 the symbol associated with the function.
2214 The information is copied from the external to the internal
2215 table, and each symbol which marks a function is marked by
2218 How does this work ?
2223 coff_slurp_line_table (abfd, asect)
2227 LINENO *native_lineno;
2228 alent *lineno_cache;
2230 BFD_ASSERT (asect->lineno == (alent *) NULL);
2232 native_lineno = (LINENO *) buy_and_read (abfd,
2233 asect->line_filepos,
2236 asect->lineno_count));
2238 (alent *) bfd_alloc (abfd, (size_t) ((asect->lineno_count + 1) * sizeof (alent)));
2239 if (lineno_cache == NULL)
2241 bfd_set_error (bfd_error_no_memory);
2246 unsigned int counter = 0;
2247 alent *cache_ptr = lineno_cache;
2248 LINENO *src = native_lineno;
2250 while (counter < asect->lineno_count)
2252 struct internal_lineno dst;
2253 coff_swap_lineno_in (abfd, src, &dst);
2254 cache_ptr->line_number = dst.l_lnno;
2256 if (cache_ptr->line_number == 0)
2258 coff_symbol_type *sym =
2259 (coff_symbol_type *) (dst.l_addr.l_symndx
2260 + obj_raw_syments (abfd))->u.syment._n._n_n._n_zeroes;
2261 cache_ptr->u.sym = (asymbol *) sym;
2262 sym->lineno = cache_ptr;
2266 cache_ptr->u.offset = dst.l_addr.l_paddr
2267 - bfd_section_vma (abfd, asect);
2268 } /* If no linenumber expect a symbol index */
2274 cache_ptr->line_number = 0;
2277 asect->lineno = lineno_cache;
2278 /* FIXME, free native_lineno here, or use alloca or something. */
2283 coff_slurp_symbol_table (abfd)
2286 combined_entry_type *native_symbols;
2287 coff_symbol_type *cached_area;
2288 unsigned int *table_ptr;
2290 unsigned int number_of_symbols = 0;
2292 if (obj_symbols (abfd))
2295 /* Read in the symbol table */
2296 if ((native_symbols = coff_get_normalized_symtab (abfd)) == NULL)
2301 /* Allocate enough room for all the symbols in cached form */
2302 cached_area = ((coff_symbol_type *)
2304 (obj_raw_syment_count (abfd)
2305 * sizeof (coff_symbol_type))));
2307 if (cached_area == NULL)
2309 bfd_set_error (bfd_error_no_memory);
2312 table_ptr = ((unsigned int *)
2314 (obj_raw_syment_count (abfd)
2315 * sizeof (unsigned int))));
2317 if (table_ptr == NULL)
2319 bfd_set_error (bfd_error_no_memory);
2324 coff_symbol_type *dst = cached_area;
2325 unsigned int last_native_index = obj_raw_syment_count (abfd);
2326 unsigned int this_index = 0;
2327 while (this_index < last_native_index)
2329 combined_entry_type *src = native_symbols + this_index;
2330 table_ptr[this_index] = number_of_symbols;
2331 dst->symbol.the_bfd = abfd;
2333 dst->symbol.name = (char *) (src->u.syment._n._n_n._n_offset);
2334 /* We use the native name field to point to the cached field. */
2335 src->u.syment._n._n_n._n_zeroes = (long) dst;
2336 dst->symbol.section = coff_section_from_bfd_index (abfd,
2337 src->u.syment.n_scnum);
2338 dst->symbol.flags = 0;
2339 dst->done_lineno = false;
2341 switch (src->u.syment.n_sclass)
2346 dst->symbol.value = src->u.syment.n_value - dst->symbol.section->vma;
2347 dst->symbol.flags = BSF_EXPORT | BSF_GLOBAL;
2348 dst->symbol.flags |= BSF_NOT_AT_END | BSF_FUNCTION;
2350 /* Fall through to next case */
2359 /* PE uses storage class 0x68 to denote a section symbol */
2362 if ((src->u.syment.n_scnum) == 0)
2364 if ((src->u.syment.n_value) == 0)
2366 dst->symbol.section = bfd_und_section_ptr;
2367 dst->symbol.value = 0;
2371 dst->symbol.section = bfd_com_section_ptr;
2372 dst->symbol.value = (src->u.syment.n_value);
2377 /* Base the value as an index from the base of the
2380 dst->symbol.flags = BSF_EXPORT | BSF_GLOBAL;
2381 dst->symbol.value = (src->u.syment.n_value
2382 - dst->symbol.section->vma);
2384 if (ISFCN ((src->u.syment.n_type)))
2386 /* A function ext does not go at the end of a
2388 dst->symbol.flags |= BSF_NOT_AT_END | BSF_FUNCTION;
2393 /* A C_HIDEXT symbol is not global. */
2394 if (src->u.syment.n_sclass == C_HIDEXT)
2395 dst->symbol.flags = BSF_LOCAL;
2397 /* If this symbol has a csect aux of type LD, the scnlen
2398 field is actually the index of the containing csect
2399 symbol. We need to pointerize it. */
2400 if (src->u.syment.n_numaux > 0)
2402 combined_entry_type *aux;
2404 aux = src + src->u.syment.n_numaux - 1;
2405 if (SMTYP_SMTYP (aux->u.auxent.x_csect.x_smtyp) == XTY_LD)
2407 aux->u.auxent.x_csect.x_scnlen.p =
2408 native_symbols + aux->u.auxent.x_csect.x_scnlen.l;
2409 aux->fix_scnlen = 1;
2416 case C_STAT: /* static */
2418 case C_LEAFSTAT: /* static leaf procedure */
2420 case C_LABEL: /* label */
2421 if (src->u.syment.n_scnum == -2)
2422 dst->symbol.flags = BSF_DEBUGGING;
2424 dst->symbol.flags = BSF_LOCAL;
2426 Base the value as an index from the base of the section, if
2429 if (dst->symbol.section)
2430 dst->symbol.value = (src->u.syment.n_value) -
2431 dst->symbol.section->vma;
2433 dst->symbol.value = (src->u.syment.n_value);
2436 case C_MOS: /* member of structure */
2437 case C_EOS: /* end of structure */
2438 #ifdef NOTDEF /* C_AUTOARG has the same value */
2440 case C_GLBLREG: /* A29k-specific storage class */
2443 case C_REGPARM: /* register parameter */
2444 case C_REG: /* register variable */
2446 case C_AUTOARG: /* 960-specific storage class */
2448 case C_TPDEF: /* type definition */
2450 case C_AUTO: /* automatic variable */
2451 case C_FIELD: /* bit field */
2452 case C_ENTAG: /* enumeration tag */
2453 case C_MOE: /* member of enumeration */
2454 case C_MOU: /* member of union */
2455 case C_UNTAG: /* union tag */
2456 dst->symbol.flags = BSF_DEBUGGING;
2457 dst->symbol.value = (src->u.syment.n_value);
2460 case C_FILE: /* file name */
2461 case C_STRTAG: /* structure tag */
2463 case C_BINCL: /* beginning of include file */
2464 case C_EINCL: /* ending of include file */
2476 dst->symbol.flags = BSF_DEBUGGING;
2477 dst->symbol.value = (src->u.syment.n_value);
2482 dst->symbol.flags = BSF_DEBUGGING;
2483 dst->symbol.value = src->u.syment.n_value;
2485 /* The value is actually a symbol index. Save a pointer to
2486 the symbol instead of the index. FIXME: This should use a
2488 src->u.syment.n_value =
2489 (long) (native_symbols + src->u.syment.n_value);
2494 case C_BLOCK: /* ".bb" or ".eb" */
2495 case C_FCN: /* ".bf" or ".ef" */
2496 case C_EFCN: /* physical end of function */
2497 dst->symbol.flags = BSF_LOCAL;
2499 Base the value as an index from the base of the section
2501 dst->symbol.value = (src->u.syment.n_value) - dst->symbol.section->vma;
2505 case C_EXTDEF: /* external definition */
2506 case C_ULABEL: /* undefined label */
2507 case C_USTATIC: /* undefined static */
2508 #ifndef COFF_WITH_PE
2509 /* C_LINE in regular coff is 0x68. NT has taken over this storage
2510 class to represent a section symbol */
2511 case C_LINE: /* line # reformatted as symbol table entry */
2513 case C_ALIAS: /* duplicate tag */
2514 case C_HIDDEN: /* ext symbol in dmert public lib */
2516 (*_bfd_error_handler)
2517 ("%s: Unrecognized storage class %d for %s symbol `%s'",
2518 bfd_get_filename (abfd), src->u.syment.n_sclass,
2519 dst->symbol.section->name, dst->symbol.name);
2520 dst->symbol.flags = BSF_DEBUGGING;
2521 dst->symbol.value = (src->u.syment.n_value);
2525 /* BFD_ASSERT(dst->symbol.flags != 0);*/
2529 dst->symbol.udata.i = 0;
2530 dst->lineno = (alent *) NULL;
2531 this_index += (src->u.syment.n_numaux) + 1;
2533 number_of_symbols++;
2534 } /* walk the native symtab */
2535 } /* bfdize the native symtab */
2537 obj_symbols (abfd) = cached_area;
2538 obj_raw_syments (abfd) = native_symbols;
2540 bfd_get_symcount (abfd) = number_of_symbols;
2541 obj_convert (abfd) = table_ptr;
2542 /* Slurp the line tables for each section too */
2548 coff_slurp_line_table (abfd, p);
2553 } /* coff_slurp_symbol_table() */
2555 /* Check whether a symbol is globally visible. This is used by the
2556 COFF backend linker code in cofflink.c, since a couple of targets
2557 have globally visible symbols which are not class C_EXT. This
2558 function need not handle the case of n_class == C_EXT. */
2560 #undef OTHER_GLOBAL_CLASS
2563 #define OTHER_GLOBAL_CLASS C_LEAFEXT
2567 #define OTHER_GLOBAL_CLASS C_SECTION
2570 #ifdef OTHER_GLOBAL_CLASS
2573 coff_sym_is_global (abfd, syment)
2575 struct internal_syment *syment;
2577 if (syment->n_sclass == OTHER_GLOBAL_CLASS)
2582 #undef OTHER_GLOBAL_CLASS
2584 #else /* ! defined (OTHER_GLOBAL_CLASS) */
2586 /* sym_is_global should not be defined if it has nothing to do. */
2588 #define coff_sym_is_global 0
2590 #endif /* ! defined (OTHER_GLOBAL_CLASS) */
2596 Coff relocations are easily transformed into the internal BFD form
2599 Reading a coff relocation table is done in the following stages:
2601 o Read the entire coff relocation table into memory.
2603 o Process each relocation in turn; first swap it from the
2604 external to the internal form.
2606 o Turn the symbol referenced in the relocation's symbol index
2607 into a pointer into the canonical symbol table.
2608 This table is the same as the one returned by a call to
2609 @code{bfd_canonicalize_symtab}. The back end will call that
2610 routine and save the result if a canonicalization hasn't been done.
2612 o The reloc index is turned into a pointer to a howto
2613 structure, in a back end specific way. For instance, the 386
2614 and 960 use the @code{r_type} to directly produce an index
2615 into a howto table vector; the 88k subtracts a number from the
2616 @code{r_type} field and creates an addend field.
2622 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
2624 coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \
2625 if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
2626 coffsym = (obj_symbols (abfd) \
2627 + (cache_ptr->sym_ptr_ptr - symbols)); \
2629 coffsym = coff_symbol_from (abfd, ptr); \
2630 if (coffsym != (coff_symbol_type *) NULL \
2631 && coffsym->native->u.syment.n_scnum == 0) \
2632 cache_ptr->addend = 0; \
2633 else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
2634 && ptr->section != (asection *) NULL) \
2635 cache_ptr->addend = - (ptr->section->vma + ptr->value); \
2637 cache_ptr->addend = 0; \
2642 coff_slurp_reloc_table (abfd, asect, symbols)
2647 RELOC *native_relocs;
2648 arelent *reloc_cache;
2653 if (asect->relocation)
2655 if (asect->reloc_count == 0)
2657 if (asect->flags & SEC_CONSTRUCTOR)
2659 if (!coff_slurp_symbol_table (abfd))
2662 (RELOC *) buy_and_read (abfd,
2666 asect->reloc_count));
2667 reloc_cache = (arelent *)
2668 bfd_alloc (abfd, (size_t) (asect->reloc_count * sizeof (arelent)));
2670 if (reloc_cache == NULL)
2672 bfd_set_error (bfd_error_no_memory);
2677 for (idx = 0; idx < asect->reloc_count; idx++)
2679 #ifdef RELOC_PROCESSING
2680 struct internal_reloc dst;
2681 struct external_reloc *src;
2683 cache_ptr = reloc_cache + idx;
2684 src = native_relocs + idx;
2685 coff_swap_reloc_in (abfd, src, &dst);
2687 RELOC_PROCESSING (cache_ptr, &dst, symbols, abfd, asect);
2689 struct internal_reloc dst;
2691 struct external_reloc *src;
2693 cache_ptr = reloc_cache + idx;
2694 src = native_relocs + idx;
2696 coff_swap_reloc_in (abfd, src, &dst);
2699 cache_ptr->address = dst.r_vaddr;
2701 if (dst.r_symndx != -1)
2703 /* @@ Should never be greater than count of symbols! */
2704 if (dst.r_symndx >= obj_conv_table_size (abfd))
2706 cache_ptr->sym_ptr_ptr = symbols + obj_convert (abfd)[dst.r_symndx];
2707 ptr = *(cache_ptr->sym_ptr_ptr);
2711 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
2715 /* The symbols definitions that we have read in have been
2716 relocated as if their sections started at 0. But the offsets
2717 refering to the symbols in the raw data have not been
2718 modified, so we have to have a negative addend to compensate.
2720 Note that symbols which used to be common must be left alone */
2722 /* Calculate any reloc addend by looking at the symbol */
2723 CALC_ADDEND (abfd, ptr, dst, cache_ptr);
2725 cache_ptr->address -= asect->vma;
2726 /* !! cache_ptr->section = (asection *) NULL;*/
2728 /* Fill in the cache_ptr->howto field from dst.r_type */
2729 RTYPE2HOWTO (cache_ptr, &dst);
2734 asect->relocation = reloc_cache;
2738 #ifndef coff_rtype_to_howto
2741 /* Get the howto structure for a reloc. This is only used if the file
2742 including this one defines coff_relocate_section to be
2743 _bfd_coff_generic_relocate_section, so it is OK if it does not
2744 always work. It is the responsibility of the including file to
2745 make sure it is reasonable if it is needed. */
2747 static reloc_howto_type *coff_rtype_to_howto
2748 PARAMS ((bfd *, asection *, struct internal_reloc *,
2749 struct coff_link_hash_entry *, struct internal_syment *,
2753 static reloc_howto_type *
2754 coff_rtype_to_howto (abfd, sec, rel, h, sym, addendp)
2757 struct internal_reloc *rel;
2758 struct coff_link_hash_entry *h;
2759 struct internal_syment *sym;
2764 RTYPE2HOWTO (&genrel, rel);
2765 return genrel.howto;
2768 #else /* ! defined (RTYPE2HOWTO) */
2770 #define coff_rtype_to_howto NULL
2772 #endif /* ! defined (RTYPE2HOWTO) */
2773 #endif /* ! defined (coff_rtype_to_howto) */
2775 /* This is stupid. This function should be a boolean predicate. */
2777 coff_canonicalize_reloc (abfd, section, relptr, symbols)
2783 arelent *tblptr = section->relocation;
2784 unsigned int count = 0;
2787 if (section->flags & SEC_CONSTRUCTOR)
2789 /* this section has relocs made up by us, they are not in the
2790 file, so take them out of their chain and place them into
2791 the data area provided */
2792 arelent_chain *chain = section->constructor_chain;
2793 for (count = 0; count < section->reloc_count; count++)
2795 *relptr++ = &chain->relent;
2796 chain = chain->next;
2802 if (! coff_slurp_reloc_table (abfd, section, symbols))
2805 tblptr = section->relocation;
2807 for (; count++ < section->reloc_count;)
2808 *relptr++ = tblptr++;
2813 return section->reloc_count;
2818 coff_sym_filepos (abfd)
2821 return obj_sym_filepos (abfd);
2825 #ifndef coff_reloc16_estimate
2826 #define coff_reloc16_estimate dummy_reloc16_estimate
2829 dummy_reloc16_estimate (abfd, input_section, reloc, shrink, link_info)
2831 asection *input_section;
2833 unsigned int shrink;
2834 struct bfd_link_info *link_info;
2841 #ifndef coff_reloc16_extra_cases
2842 #define coff_reloc16_extra_cases dummy_reloc16_extra_cases
2843 /* This works even if abort is not declared in any header file. */
2845 dummy_reloc16_extra_cases (abfd, link_info, link_order, reloc, data, src_ptr,
2848 struct bfd_link_info *link_info;
2849 struct bfd_link_order *link_order;
2852 unsigned int *src_ptr;
2853 unsigned int *dst_ptr;
2859 /* If coff_relocate_section is defined, we can use the optimized COFF
2860 backend linker. Otherwise we must continue to use the old linker. */
2861 #ifdef coff_relocate_section
2862 #ifndef coff_bfd_link_hash_table_create
2863 #define coff_bfd_link_hash_table_create _bfd_coff_link_hash_table_create
2865 #ifndef coff_bfd_link_add_symbols
2866 #define coff_bfd_link_add_symbols _bfd_coff_link_add_symbols
2868 #ifndef coff_bfd_final_link
2869 #define coff_bfd_final_link _bfd_coff_final_link
2871 #else /* ! defined (coff_relocate_section) */
2872 #define coff_relocate_section NULL
2873 #define coff_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
2874 #define coff_bfd_link_add_symbols _bfd_generic_link_add_symbols
2875 #define coff_bfd_final_link _bfd_generic_final_link
2876 #endif /* ! defined (coff_relocate_section) */
2877 #define coff_bfd_link_split_section _bfd_generic_link_split_section
2879 #ifndef coff_start_final_link
2880 #define coff_start_final_link NULL
2883 #ifndef coff_adjust_symndx
2884 #define coff_adjust_symndx NULL
2887 static CONST bfd_coff_backend_data bfd_coff_std_swap_table =
2889 coff_swap_aux_in, coff_swap_sym_in, coff_swap_lineno_in,
2890 coff_swap_aux_out, coff_swap_sym_out,
2891 coff_swap_lineno_out, coff_swap_reloc_out,
2892 coff_swap_filehdr_out, coff_swap_aouthdr_out,
2893 coff_swap_scnhdr_out,
2894 FILHSZ, AOUTSZ, SCNHSZ, SYMESZ, AUXESZ, RELSZ, LINESZ,
2895 #ifdef COFF_LONG_FILENAMES
2900 coff_swap_filehdr_in, coff_swap_aouthdr_in, coff_swap_scnhdr_in,
2901 coff_swap_reloc_in, coff_bad_format_hook, coff_set_arch_mach_hook,
2902 coff_mkobject_hook, styp_to_sec_flags, coff_set_alignment_hook,
2903 coff_slurp_symbol_table, symname_in_debug_hook, coff_pointerize_aux_hook,
2904 coff_reloc16_extra_cases, coff_reloc16_estimate,
2905 coff_sym_is_global, coff_compute_section_file_positions,
2906 coff_start_final_link, coff_relocate_section, coff_rtype_to_howto,
2910 #define coff_close_and_cleanup _bfd_generic_close_and_cleanup
2911 #define coff_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
2912 #define coff_get_section_contents _bfd_generic_get_section_contents
2914 #ifndef coff_bfd_copy_private_symbol_data
2915 #define coff_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data
2918 #ifndef coff_bfd_copy_private_section_data
2919 #define coff_bfd_copy_private_section_data _bfd_generic_bfd_copy_private_section_data
2922 #ifndef coff_bfd_copy_private_bfd_data
2923 #define coff_bfd_copy_private_bfd_data _bfd_generic_bfd_copy_private_bfd_data
2926 #define coff_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
2927 #define coff_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
2929 #ifndef coff_bfd_print_private_bfd_data
2930 #define coff_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data
2933 #ifndef coff_bfd_is_local_label
2934 #define coff_bfd_is_local_label bfd_generic_is_local_label
2936 #ifndef coff_read_minisymbols
2937 #define coff_read_minisymbols _bfd_generic_read_minisymbols
2939 #ifndef coff_minisymbol_to_symbol
2940 #define coff_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
2943 /* The reloc lookup routine must be supplied by each individual COFF
2945 #ifndef coff_bfd_reloc_type_lookup
2946 #define coff_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
2949 #ifndef coff_bfd_get_relocated_section_contents
2950 #define coff_bfd_get_relocated_section_contents \
2951 bfd_generic_get_relocated_section_contents
2953 #ifndef coff_bfd_relax_section
2954 #define coff_bfd_relax_section bfd_generic_relax_section