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;
988 else if (strncmp (section->name, ".stab", 5) == 0)
990 section->alignment_power = 2;
997 #else /* ! COFF_WITH_PE */
1000 /* We grossly abuse this function to handle XCOFF overflow headers.
1001 When we see one, we correct the reloc and line number counts in the
1002 real header, and remove the section we just created. */
1005 coff_set_alignment_hook (abfd, section, scnhdr)
1010 struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr;
1014 if ((hdr->s_flags & STYP_OVRFLO) == 0)
1017 real_sec = coff_section_from_bfd_index (abfd, hdr->s_nreloc);
1018 if (real_sec == NULL)
1021 real_sec->reloc_count = hdr->s_paddr;
1022 real_sec->lineno_count = hdr->s_vaddr;
1024 for (ps = &abfd->sections; *ps != NULL; ps = &(*ps)->next)
1029 --abfd->section_count;
1035 #else /* ! RS6000COFF_C */
1037 #define coff_set_alignment_hook \
1038 ((void (*) PARAMS ((bfd *, asection *, PTR))) bfd_void)
1040 #endif /* ! RS6000COFF_C */
1041 #endif /* ! COFF_WITH_PE */
1044 #ifndef coff_mkobject
1046 coff_mkobject (abfd)
1049 coff_data_type *coff;
1051 abfd->tdata.coff_obj_data = (struct coff_tdata *) bfd_zalloc (abfd, sizeof (coff_data_type));
1052 if (abfd->tdata.coff_obj_data == 0)
1054 coff = coff_data (abfd);
1055 coff->symbols = (coff_symbol_type *) NULL;
1056 coff->conversion_table = (unsigned int *) NULL;
1057 coff->raw_syments = (struct coff_ptr_struct *) NULL;
1058 coff->relocbase = 0;
1059 coff->local_toc_sym_map = 0;
1061 /* make_abs_section(abfd);*/
1067 /* Create the COFF backend specific information. */
1068 #ifndef coff_mkobject_hook
1070 coff_mkobject_hook (abfd, filehdr, aouthdr)
1075 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
1076 coff_data_type *coff;
1078 if (coff_mkobject (abfd) == false)
1081 coff = coff_data (abfd);
1083 coff->sym_filepos = internal_f->f_symptr;
1085 /* These members communicate important constants about the symbol
1086 table to GDB's symbol-reading code. These `constants'
1087 unfortunately vary among coff implementations... */
1088 coff->local_n_btmask = N_BTMASK;
1089 coff->local_n_btshft = N_BTSHFT;
1090 coff->local_n_tmask = N_TMASK;
1091 coff->local_n_tshift = N_TSHIFT;
1092 coff->local_symesz = SYMESZ;
1093 coff->local_auxesz = AUXESZ;
1094 coff->local_linesz = LINESZ;
1096 obj_raw_syment_count (abfd) =
1097 obj_conv_table_size (abfd) =
1098 internal_f->f_nsyms;
1101 if ((internal_f->f_flags & F_SHROBJ) != 0)
1102 abfd->flags |= DYNAMIC;
1103 if (aouthdr != NULL && internal_f->f_opthdr >= AOUTSZ)
1105 struct internal_aouthdr *internal_a =
1106 (struct internal_aouthdr *) aouthdr;
1107 struct xcoff_tdata *xcoff;
1109 xcoff = xcoff_data (abfd);
1110 xcoff->full_aouthdr = true;
1111 xcoff->toc = internal_a->o_toc;
1112 if (internal_a->o_sntoc == 0)
1113 xcoff->toc_section = NULL;
1115 xcoff->toc_section =
1116 coff_section_from_bfd_index (abfd, internal_a->o_sntoc);
1117 if (internal_a->o_snentry == 0)
1118 xcoff->entry_section = NULL;
1120 xcoff->entry_section =
1121 coff_section_from_bfd_index (abfd, internal_a->o_snentry);
1122 xcoff->text_align_power = internal_a->o_algntext;
1123 xcoff->data_align_power = internal_a->o_algndata;
1124 xcoff->modtype = internal_a->o_modtype;
1125 xcoff->cputype = internal_a->o_cputype;
1126 xcoff->maxdata = internal_a->o_maxdata;
1127 xcoff->maxstack = internal_a->o_maxstack;
1135 /* Determine the machine architecture and type. FIXME: This is target
1136 dependent because the magic numbers are defined in the target
1137 dependent header files. But there is no particular need for this.
1138 If the magic numbers were moved to a separate file, this function
1139 would be target independent and would also be much more successful
1140 at linking together COFF files for different architectures. */
1143 coff_set_arch_mach_hook (abfd, filehdr)
1148 enum bfd_architecture arch;
1149 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
1152 switch (internal_f->f_magic)
1156 arch = bfd_arch_powerpc;
1157 machine = 0; /* what does this mean? (krk) */
1163 case I386AIXMAGIC: /* Danbury PS/2 AIX C Compiler */
1164 case LYNXCOFFMAGIC: /* shadows the m68k Lynx number below, sigh */
1165 arch = bfd_arch_i386;
1169 #ifdef A29K_MAGIC_BIG
1170 case A29K_MAGIC_BIG:
1171 case A29K_MAGIC_LITTLE:
1172 arch = bfd_arch_a29k;
1178 arch = bfd_arch_arm;
1185 #ifdef MC68KBCSMAGIC
1188 #ifdef APOLLOM68KMAGIC
1189 case APOLLOM68KMAGIC:
1191 #ifdef LYNXCOFFMAGIC
1194 arch = bfd_arch_m68k;
1202 arch = bfd_arch_m88k;
1208 arch = bfd_arch_z8k;
1209 switch (internal_f->f_flags & F_MACHMASK)
1212 machine = bfd_mach_z8001;
1215 machine = bfd_mach_z8002;
1224 arch = bfd_arch_i860;
1231 arch = bfd_arch_i960;
1232 switch (F_I960TYPE & internal_f->f_flags)
1236 machine = bfd_mach_i960_core;
1239 machine = bfd_mach_i960_kb_sb;
1242 machine = bfd_mach_i960_mc;
1245 machine = bfd_mach_i960_xa;
1248 machine = bfd_mach_i960_ca;
1251 machine = bfd_mach_i960_ka_sa;
1253 /* start-sanitize-i960xl */
1255 machine = bfd_mach_i960_xl;
1257 /* end-sanitize-i960xl */
1270 if (xcoff_data (abfd)->cputype != -1)
1271 cputype = xcoff_data (abfd)->cputype & 0xff;
1274 /* We did not get a value from the a.out header. If the
1275 file has not been stripped, we may be able to get the
1276 architecture information from the first symbol, if it
1277 is a .file symbol. */
1278 if (obj_raw_syment_count (abfd) == 0)
1282 bfd_byte buf[SYMESZ];
1283 struct internal_syment sym;
1285 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0
1286 || bfd_read (buf, 1, SYMESZ, abfd) != SYMESZ)
1288 coff_swap_sym_in (abfd, (PTR) buf, (PTR) &sym);
1289 if (sym.n_sclass == C_FILE)
1290 cputype = sym.n_type & 0xff;
1296 /* FIXME: We don't handle all cases here. */
1302 /* PowerPC Macs use the same magic numbers as RS/6000
1303 (because that's how they were bootstrapped originally),
1304 but they are always PowerPC architecture. */
1305 arch = bfd_arch_powerpc;
1308 arch = bfd_arch_rs6000;
1310 #endif /* POWERMAC */
1314 arch = bfd_arch_powerpc;
1317 case 2: /* 64 bit PowerPC */
1318 arch = bfd_arch_powerpc;
1322 arch = bfd_arch_powerpc;
1326 arch = bfd_arch_rs6000;
1336 arch = bfd_arch_we32k;
1343 arch = bfd_arch_h8300;
1344 machine = bfd_mach_h8300;
1345 /* !! FIXME this probably isn't the right place for this */
1346 abfd->flags |= BFD_IS_RELAXABLE;
1352 arch = bfd_arch_h8300;
1353 machine = bfd_mach_h8300h;
1354 /* !! FIXME this probably isn't the right place for this */
1355 abfd->flags |= BFD_IS_RELAXABLE;
1359 #ifdef SH_ARCH_MAGIC_BIG
1360 case SH_ARCH_MAGIC_BIG:
1361 case SH_ARCH_MAGIC_LITTLE:
1369 arch = bfd_arch_h8500;
1376 #ifdef LYNXCOFFMAGIC
1379 arch = bfd_arch_sparc;
1384 default: /* Unreadable input file type */
1385 arch = bfd_arch_obscure;
1389 bfd_default_set_arch_mach (abfd, arch, machine);
1393 #ifdef SYMNAME_IN_DEBUG
1396 symname_in_debug_hook (abfd, sym)
1398 struct internal_syment *sym;
1400 return SYMNAME_IN_DEBUG (sym) ? true : false;
1405 #define symname_in_debug_hook \
1406 (boolean (*) PARAMS ((bfd *, struct internal_syment *))) bfd_false
1412 /* Handle the csect auxent of a C_EXT or C_HIDEXT symbol. */
1414 static boolean coff_pointerize_aux_hook
1415 PARAMS ((bfd *, combined_entry_type *, combined_entry_type *,
1416 unsigned int, combined_entry_type *));
1420 coff_pointerize_aux_hook (abfd, table_base, symbol, indaux, aux)
1422 combined_entry_type *table_base;
1423 combined_entry_type *symbol;
1424 unsigned int indaux;
1425 combined_entry_type *aux;
1427 int class = symbol->u.syment.n_sclass;
1429 if ((class == C_EXT || class == C_HIDEXT)
1430 && indaux + 1 == symbol->u.syment.n_numaux)
1432 if (SMTYP_SMTYP (aux->u.auxent.x_csect.x_smtyp) == XTY_LD)
1434 aux->u.auxent.x_csect.x_scnlen.p =
1435 table_base + aux->u.auxent.x_csect.x_scnlen.l;
1436 aux->fix_scnlen = 1;
1439 /* Return true to indicate that the caller should not do any
1440 further work on this auxent. */
1444 /* Return false to indicate that this auxent should be handled by
1452 /* We don't want to pointerize bal entries. */
1454 static boolean coff_pointerize_aux_hook
1455 PARAMS ((bfd *, combined_entry_type *, combined_entry_type *,
1456 unsigned int, combined_entry_type *));
1460 coff_pointerize_aux_hook (abfd, table_base, symbol, indaux, aux)
1462 combined_entry_type *table_base;
1463 combined_entry_type *symbol;
1464 unsigned int indaux;
1465 combined_entry_type *aux;
1467 /* Return true if we don't want to pointerize this aux entry, which
1468 is the case for the lastfirst aux entry for a C_LEAFPROC symbol. */
1470 && (symbol->u.syment.n_sclass == C_LEAFPROC
1471 || symbol->u.syment.n_sclass == C_LEAFSTAT
1472 || symbol->u.syment.n_sclass == C_LEAFEXT));
1477 #define coff_pointerize_aux_hook 0
1480 #endif /* ! RS6000COFF_C */
1482 /* Print an aux entry. This returns true if it has printed it. */
1484 static boolean coff_print_aux
1485 PARAMS ((bfd *, FILE *, combined_entry_type *, combined_entry_type *,
1486 combined_entry_type *, unsigned int));
1489 coff_print_aux (abfd, file, table_base, symbol, aux, indaux)
1492 combined_entry_type *table_base;
1493 combined_entry_type *symbol;
1494 combined_entry_type *aux;
1495 unsigned int indaux;
1498 if ((symbol->u.syment.n_sclass == C_EXT
1499 || symbol->u.syment.n_sclass == C_HIDEXT)
1500 && indaux + 1 == symbol->u.syment.n_numaux)
1502 /* This is a csect entry. */
1503 fprintf (file, "AUX ");
1504 if (SMTYP_SMTYP (aux->u.auxent.x_csect.x_smtyp) != XTY_LD)
1506 BFD_ASSERT (! aux->fix_scnlen);
1507 fprintf (file, "val %5ld", aux->u.auxent.x_csect.x_scnlen.l);
1511 fprintf (file, "indx ");
1512 if (! aux->fix_scnlen)
1513 fprintf (file, "%4ld", aux->u.auxent.x_csect.x_scnlen.l);
1515 fprintf (file, "%4ld",
1516 (long) (aux->u.auxent.x_csect.x_scnlen.p - table_base));
1519 " prmhsh %ld snhsh %u typ %d algn %d clss %u stb %ld snstb %u",
1520 aux->u.auxent.x_csect.x_parmhash,
1521 (unsigned int) aux->u.auxent.x_csect.x_snhash,
1522 SMTYP_SMTYP (aux->u.auxent.x_csect.x_smtyp),
1523 SMTYP_ALIGN (aux->u.auxent.x_csect.x_smtyp),
1524 (unsigned int) aux->u.auxent.x_csect.x_smclas,
1525 aux->u.auxent.x_csect.x_stab,
1526 (unsigned int) aux->u.auxent.x_csect.x_snstab);
1531 /* Return false to indicate that no special action was taken. */
1539 To write relocations, the back end steps though the
1540 canonical relocation table and create an
1541 @code{internal_reloc}. The symbol index to use is removed from
1542 the @code{offset} field in the symbol table supplied. The
1543 address comes directly from the sum of the section base
1544 address and the relocation offset; the type is dug directly
1545 from the howto field. Then the @code{internal_reloc} is
1546 swapped into the shape of an @code{external_reloc} and written
1552 coff_write_relocs (abfd, first_undef)
1557 for (s = abfd->sections; s != (asection *) NULL; s = s->next)
1560 struct external_reloc dst;
1562 arelent **p = s->orelocation;
1563 if (bfd_seek (abfd, s->rel_filepos, SEEK_SET) != 0)
1565 for (i = 0; i < s->reloc_count; i++)
1567 struct internal_reloc n;
1569 memset ((PTR) & n, 0, sizeof (n));
1571 /* Now we've renumbered the symbols we know where the
1572 undefined symbols live in the table. Check the reloc
1573 entries for symbols who's output bfd isn't the right one.
1574 This is because the symbol was undefined (which means
1575 that all the pointers are never made to point to the same
1576 place). This is a bad thing,'cause the symbols attached
1577 to the output bfd are indexed, so that the relocation
1578 entries know which symbol index they point to. So we
1579 have to look up the output symbol here. */
1581 if (q->sym_ptr_ptr[0]->the_bfd != abfd)
1584 const char *sname = q->sym_ptr_ptr[0]->name;
1585 asymbol **outsyms = abfd->outsymbols;
1586 for (i = first_undef; outsyms[i]; i++)
1588 const char *intable = outsyms[i]->name;
1589 if (strcmp (intable, sname) == 0) {
1590 /* got a hit, so repoint the reloc */
1591 q->sym_ptr_ptr = outsyms + i;
1597 n.r_vaddr = q->address + s->vma;
1600 /* The 29k const/consth reloc pair is a real kludge. The consth
1601 part doesn't have a symbol; it has an offset. So rebuilt
1603 if (q->howto->type == R_IHCONST)
1604 n.r_symndx = q->addend;
1609 if (q->sym_ptr_ptr == bfd_abs_section_ptr->symbol_ptr_ptr)
1610 /* This is a relocation relative to the absolute symbol. */
1614 n.r_symndx = get_index ((*(q->sym_ptr_ptr)));
1615 /* Take notice if the symbol reloc points to a symbol
1616 we don't have in our symbol table. What should we
1618 if (n.r_symndx > obj_conv_table_size (abfd))
1623 #ifdef SWAP_OUT_RELOC_OFFSET
1624 n.r_offset = q->addend;
1628 /* Work out reloc type from what is required */
1629 SELECT_RELOC (n, q->howto);
1631 n.r_type = q->howto->type;
1633 coff_swap_reloc_out (abfd, &n, &dst);
1634 if (bfd_write ((PTR) & dst, 1, RELSZ, abfd) != RELSZ)
1642 /* Set flags and magic number of a coff file from architecture and machine
1643 type. Result is true if we can represent the arch&type, false if not. */
1646 coff_set_flags (abfd, magicp, flagsp)
1649 unsigned short *flagsp;
1651 switch (bfd_get_arch (abfd))
1656 switch (bfd_get_mach (abfd))
1658 case bfd_mach_z8001:
1661 case bfd_mach_z8002:
1675 *magicp = I960ROMAGIC;
1677 ((bfd_get_file_flags(abfd) & WP_TEXT) ? I960ROMAGIC :
1678 I960RWMAGIC); FIXME???
1680 switch (bfd_get_mach (abfd))
1682 case bfd_mach_i960_core:
1685 case bfd_mach_i960_kb_sb:
1688 case bfd_mach_i960_mc:
1691 case bfd_mach_i960_xa:
1694 case bfd_mach_i960_ca:
1697 case bfd_mach_i960_ka_sa:
1700 /* start-sanitize-i960xl */
1701 case bfd_mach_i960_xl:
1704 /* end-sanitize-i960xl */
1719 case bfd_arch_powerpc:
1726 *magicp = I386MAGIC;
1728 /* Just overwrite the usual value if we're doing Lynx. */
1729 *magicp = LYNXCOFFMAGIC;
1736 *magicp = I860MAGIC;
1742 #ifdef APOLLOM68KMAGIC
1743 *magicp = APOLLO_COFF_VERSION_NUMBER;
1745 *magicp = MC68MAGIC;
1748 /* Just overwrite the usual value if we're doing Lynx. */
1749 *magicp = LYNXCOFFMAGIC;
1757 *magicp = MC88OMAGIC;
1762 case bfd_arch_h8300:
1763 switch (bfd_get_mach (abfd))
1765 case bfd_mach_h8300:
1766 *magicp = H8300MAGIC;
1768 case bfd_mach_h8300h:
1769 *magicp = H8300HMAGIC;
1775 #ifdef SH_ARCH_MAGIC_BIG
1777 if (bfd_big_endian (abfd))
1778 *magicp = SH_ARCH_MAGIC_BIG;
1780 *magicp = SH_ARCH_MAGIC_LITTLE;
1786 case bfd_arch_sparc:
1787 *magicp = SPARCMAGIC;
1789 /* Just overwrite the usual value if we're doing Lynx. */
1790 *magicp = LYNXCOFFMAGIC;
1797 case bfd_arch_h8500:
1798 *magicp = H8500MAGIC;
1802 #ifdef A29K_MAGIC_BIG
1804 if (bfd_big_endian (abfd))
1805 *magicp = A29K_MAGIC_BIG;
1807 *magicp = A29K_MAGIC_LITTLE;
1813 case bfd_arch_we32k:
1814 *magicp = WE32KMAGIC;
1820 case bfd_arch_rs6000:
1822 case bfd_arch_powerpc:
1824 *magicp = U802TOCMAGIC;
1829 default: /* Unknown architecture */
1830 /* return false; -- fall through to "return false" below, to avoid
1831 "statement never reached" errors on the one below. */
1840 coff_set_arch_mach (abfd, arch, machine)
1842 enum bfd_architecture arch;
1843 unsigned long machine;
1846 unsigned short dummy2;
1848 if (! bfd_default_set_arch_mach (abfd, arch, machine))
1851 if (arch != bfd_arch_unknown &&
1852 coff_set_flags (abfd, &dummy1, &dummy2) != true)
1853 return false; /* We can't represent this type */
1855 return true; /* We're easy ... */
1859 /* Calculate the file position for each section. */
1862 coff_compute_section_file_positions (abfd)
1866 asection *previous = (asection *) NULL;
1867 file_ptr sofar = FILHSZ;
1875 /* On XCOFF, if we have symbols, set up the .debug section. */
1876 if (bfd_get_symcount (abfd) > 0)
1879 bfd_size_type i, symcount;
1883 symcount = bfd_get_symcount (abfd);
1884 for (symp = abfd->outsymbols, i = 0; i < symcount; symp++, i++)
1886 coff_symbol_type *cf;
1888 cf = coff_symbol_from (abfd, *symp);
1890 && cf->native != NULL
1891 && SYMNAME_IN_DEBUG (&cf->native->u.syment))
1895 len = strlen (bfd_asymbol_name (*symp));
1904 dsec = bfd_make_section_old_way (abfd, ".debug");
1907 dsec->_raw_size = sz;
1908 dsec->flags |= SEC_HAS_CONTENTS;
1913 #ifdef COFF_IMAGE_WITH_PE
1915 if (coff_data (abfd)->link_info)
1917 page_size = pe_data (abfd)->pe_opthdr.FileAlignment;
1920 page_size = PE_DEF_FILE_ALIGNMENT;
1922 #ifdef COFF_PAGE_SIZE
1923 int page_size = COFF_PAGE_SIZE;
1927 if (bfd_get_start_address (abfd))
1929 /* A start address may have been added to the original file. In this
1930 case it will need an optional header to record it. */
1931 abfd->flags |= EXEC_P;
1934 if (abfd->flags & EXEC_P)
1937 else if (xcoff_data (abfd)->full_aouthdr)
1940 sofar += SMALL_AOUTSZ;
1943 sofar += abfd->section_count * SCNHSZ;
1946 /* XCOFF handles overflows in the reloc and line number count fields
1947 by allocating a new section header to hold the correct counts. */
1948 for (current = abfd->sections; current != NULL; current = current->next)
1949 if (current->reloc_count >= 0xffff || current->lineno_count >= 0xffff)
1953 for (current = abfd->sections, count = 1;
1954 current != (asection *) NULL;
1955 current = current->next, ++count)
1957 current->target_index = count;
1959 /* Only deal with sections which have contents */
1960 if (!(current->flags & SEC_HAS_CONTENTS))
1964 /* Do not include the .junk section. This is where we collect section
1965 data which we don't need. This is mainly the MS .debug$ data which
1966 stores codeview debug data. */
1967 if (strcmp (current->name, ".junk") == 0)
1973 /* Align the sections in the file to the same boundary on
1974 which they are aligned in virtual memory. I960 doesn't
1975 do this (FIXME) so we can stay in sync with Intel. 960
1976 doesn't yet page from files... */
1978 if ((abfd->flags & EXEC_P) != 0)
1980 /* make sure this section is aligned on the right boundary - by
1981 padding the previous section up if necessary */
1984 sofar = BFD_ALIGN (sofar, 1 << current->alignment_power);
1985 if (previous != (asection *) NULL)
1987 previous->_raw_size += sofar - old_sofar;
1993 /* In demand paged files the low order bits of the file offset
1994 must match the low order bits of the virtual address. */
1995 #ifdef COFF_PAGE_SIZE
1996 if ((abfd->flags & D_PAGED) != 0
1997 && (current->flags & SEC_ALLOC) != 0)
1998 sofar += (current->vma - sofar) % page_size;
2000 current->filepos = sofar;
2002 #ifdef COFF_IMAGE_WITH_PE
2003 /* With PE we have to pad each section to be a multiple of its page size
2004 too, and remember both sizes. Cooked_size becomes very useful. */
2005 current->_cooked_size = current->_raw_size;
2006 current->_raw_size = (current->_raw_size + page_size -1) & -page_size;
2009 sofar += current->_raw_size;
2012 /* make sure that this section is of the right size too */
2014 sofar = BFD_ALIGN (sofar, 1 << current->alignment_power);
2015 current->_raw_size += sofar - old_sofar;
2019 /* Force .lib sections to start at zero. The vma is then
2020 incremented in coff_set_section_contents. This is right for
2022 if (strcmp (current->name, _LIB) == 0)
2023 bfd_set_section_vma (abfd, current, 0);
2029 obj_relocbase (abfd) = sofar;
2030 abfd->output_has_begun = true;
2034 #ifndef RS6000COFF_C
2036 /* If .file, .text, .data, .bss symbols are missing, add them. */
2037 /* @@ Should we only be adding missing symbols, or overriding the aux
2038 values for existing section symbols? */
2040 coff_add_missing_symbols (abfd)
2043 unsigned int nsyms = bfd_get_symcount (abfd);
2044 asymbol **sympp = abfd->outsymbols;
2047 int need_text = 1, need_data = 1, need_bss = 1, need_file = 1;
2049 for (i = 0; i < nsyms; i++)
2051 coff_symbol_type *csym = coff_symbol_from (abfd, sympp[i]);
2055 /* only do this if there is a coff representation of the input
2057 if (csym->native && csym->native->u.syment.n_sclass == C_FILE)
2062 name = csym->symbol.name;
2065 if (!strcmp (name, _TEXT))
2068 else if (!strcmp (name, ".wtext"))
2071 else if (!strcmp (name, _DATA))
2073 else if (!strcmp (name, _BSS))
2077 /* Now i == bfd_get_symcount (abfd). */
2078 /* @@ For now, don't deal with .file symbol. */
2081 if (!need_text && !need_data && !need_bss && !need_file)
2083 nsyms += need_text + need_data + need_bss + need_file;
2084 sympp2 = (asymbol **) bfd_alloc_by_size_t (abfd, nsyms * sizeof (asymbol *));
2087 memcpy (sympp2, sympp, i * sizeof (asymbol *));
2090 /* @@ Generate fake .file symbol, in sympp2[i], and increment i. */
2094 sympp2[i++] = coff_section_symbol (abfd, _TEXT);
2096 sympp2[i++] = coff_section_symbol (abfd, _DATA);
2098 sympp2[i++] = coff_section_symbol (abfd, _BSS);
2099 BFD_ASSERT (i == nsyms);
2100 bfd_set_symtab (abfd, sympp2, nsyms);
2104 #endif /* ! defined (RS6000COFF_C) */
2111 coff_write_object_contents (abfd)
2115 boolean hasrelocs = false;
2116 boolean haslinno = false;
2118 file_ptr reloc_base;
2119 file_ptr lineno_base;
2121 unsigned long reloc_size = 0;
2122 unsigned long lnno_size = 0;
2123 asection *text_sec = NULL;
2124 asection *data_sec = NULL;
2125 asection *bss_sec = NULL;
2127 struct internal_filehdr internal_f;
2128 struct internal_aouthdr internal_a;
2130 bfd_set_error (bfd_error_system_call);
2132 /* Make a pass through the symbol table to count line number entries and
2133 put them into the correct asections */
2135 lnno_size = coff_count_linenumbers (abfd) * LINESZ;
2137 if (abfd->output_has_begun == false)
2138 coff_compute_section_file_positions (abfd);
2140 reloc_base = obj_relocbase (abfd);
2142 /* Work out the size of the reloc and linno areas */
2144 for (current = abfd->sections; current != NULL; current =
2146 reloc_size += current->reloc_count * RELSZ;
2148 lineno_base = reloc_base + reloc_size;
2149 sym_base = lineno_base + lnno_size;
2151 /* Indicate in each section->line_filepos its actual file address */
2152 for (current = abfd->sections; current != NULL; current =
2155 if (current->lineno_count)
2157 current->line_filepos = lineno_base;
2158 current->moving_line_filepos = lineno_base;
2159 lineno_base += current->lineno_count * LINESZ;
2163 current->line_filepos = 0;
2165 if (current->reloc_count)
2167 current->rel_filepos = reloc_base;
2168 reloc_base += current->reloc_count * RELSZ;
2172 current->rel_filepos = 0;
2176 /* Write section headers to the file. */
2177 internal_f.f_nscns = 0;
2179 if ((abfd->flags & EXEC_P) != 0)
2180 scn_base = FILHSZ + AOUTSZ;
2185 if (xcoff_data (abfd)->full_aouthdr)
2188 scn_base += SMALL_AOUTSZ;
2192 if (bfd_seek (abfd, scn_base, SEEK_SET) != 0)
2195 for (current = abfd->sections;
2197 current = current->next)
2199 struct internal_scnhdr section;
2202 /* Do not include the .junk section. This is where we collect section
2203 data which we don't need. This is mainly the MS .debug$ data which
2204 stores codeview debug data. */
2205 if (strcmp (current->name, ".junk") == 0)
2210 /* If we've got a .reloc section, remember. */
2212 #ifdef COFF_IMAGE_WITH_PE
2213 if (strcmp (current->name, ".reloc") == 0)
2215 pe_data (abfd)->has_reloc_section = 1;
2220 internal_f.f_nscns++;
2221 strncpy (&(section.s_name[0]), current->name, 8);
2223 /* Always set s_vaddr of .lib to 0. This is right for SVR3.2
2225 if (strcmp (current->name, _LIB) == 0)
2226 section.s_vaddr = 0;
2229 section.s_vaddr = current->vma;
2230 section.s_paddr = current->lma;
2231 section.s_size = current->_raw_size;
2234 section.s_paddr = current->_cooked_size;
2238 If this section has no size or is unloadable then the scnptr
2241 if (current->_raw_size == 0 ||
2242 (current->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2244 section.s_scnptr = 0;
2248 section.s_scnptr = current->filepos;
2250 section.s_relptr = current->rel_filepos;
2251 section.s_lnnoptr = current->line_filepos;
2252 section.s_nreloc = current->reloc_count;
2253 section.s_nlnno = current->lineno_count;
2254 if (current->reloc_count != 0)
2256 if (current->lineno_count != 0)
2260 /* Indicate the use of an XCOFF overflow section header. */
2261 if (current->reloc_count >= 0xffff || current->lineno_count >= 0xffff)
2263 section.s_nreloc = 0xffff;
2264 section.s_nlnno = 0xffff;
2268 section.s_flags = sec_to_styp_flags (current->name, current->flags);
2270 if (!strcmp (current->name, _TEXT))
2274 else if (!strcmp (current->name, _DATA))
2278 else if (!strcmp (current->name, _BSS))
2284 section.s_align = (current->alignment_power
2285 ? 1 << current->alignment_power
2290 #ifdef COFF_IMAGE_WITH_PE
2291 /* suppress output of the sections if they are null. ld includes
2292 the bss and data sections even if there is no size assigned
2293 to them. NT loader doesn't like it if these section headers are
2294 included if the sections themselves are not needed */
2295 if (section.s_size == 0)
2296 internal_f.f_nscns--;
2301 if (coff_swap_scnhdr_out (abfd, §ion, &buff) == 0
2302 || bfd_write ((PTR) (&buff), 1, SCNHSZ, abfd) != SCNHSZ)
2308 /* XCOFF handles overflows in the reloc and line number count fields
2309 by creating a new section header to hold the correct values. */
2310 for (current = abfd->sections; current != NULL; current = current->next)
2312 if (current->reloc_count >= 0xffff || current->lineno_count >= 0xffff)
2314 struct internal_scnhdr scnhdr;
2317 internal_f.f_nscns++;
2318 strncpy (&(scnhdr.s_name[0]), current->name, 8);
2319 scnhdr.s_paddr = current->reloc_count;
2320 scnhdr.s_vaddr = current->lineno_count;
2322 scnhdr.s_scnptr = 0;
2323 scnhdr.s_relptr = current->rel_filepos;
2324 scnhdr.s_lnnoptr = current->line_filepos;
2325 scnhdr.s_nreloc = current->target_index;
2326 scnhdr.s_nlnno = current->target_index;
2327 scnhdr.s_flags = STYP_OVRFLO;
2328 if (coff_swap_scnhdr_out (abfd, &scnhdr, &buff) == 0
2329 || bfd_write ((PTR) &buff, 1, SCNHSZ, abfd) != SCNHSZ)
2335 /* OK, now set up the filehdr... */
2337 /* Don't include the internal abs section in the section count */
2340 We will NOT put a fucking timestamp in the header here. Every time you
2341 put it back, I will come in and take it out again. I'm sorry. This
2342 field does not belong here. We fill it with a 0 so it compares the
2345 internal_f.f_timdat = 0;
2347 internal_f.f_flags = 0;
2349 if (abfd->flags & EXEC_P)
2350 internal_f.f_opthdr = AOUTSZ;
2353 internal_f.f_opthdr = 0;
2355 if (xcoff_data (abfd)->full_aouthdr)
2356 internal_f.f_opthdr = AOUTSZ;
2358 internal_f.f_opthdr = SMALL_AOUTSZ;
2363 internal_f.f_flags |= F_RELFLG;
2365 internal_f.f_flags |= F_LNNO;
2366 if (abfd->flags & EXEC_P)
2367 internal_f.f_flags |= F_EXEC;
2369 /* FIXME: this is wrong for PPC_PE! */
2370 if (bfd_little_endian (abfd))
2371 internal_f.f_flags |= F_AR32WR;
2373 internal_f.f_flags |= F_AR32W;
2376 FIXME, should do something about the other byte orders and
2381 if ((abfd->flags & DYNAMIC) != 0)
2382 internal_f.f_flags |= F_SHROBJ;
2383 if (bfd_get_section_by_name (abfd, _LOADER) != NULL)
2384 internal_f.f_flags |= F_DYNLOAD;
2387 memset (&internal_a, 0, sizeof internal_a);
2389 /* Set up architecture-dependent stuff */
2392 unsigned int magic = 0;
2393 unsigned short flags = 0;
2394 coff_set_flags (abfd, &magic, &flags);
2395 internal_f.f_magic = magic;
2396 internal_f.f_flags |= flags;
2397 /* ...and the "opt"hdr... */
2400 #ifdef ULTRA3 /* NYU's machine */
2401 /* FIXME: This is a bogus check. I really want to see if there
2402 * is a .shbss or a .shdata section, if so then set the magic
2403 * number to indicate a shared data executable.
2405 if (internal_f.f_nscns >= 7)
2406 internal_a.magic = SHMAGIC; /* Shared magic */
2409 internal_a.magic = NMAGIC; /* Assume separate i/d */
2410 #define __A_MAGIC_SET__
2413 /* FIXME: What are the a.out magic numbers for the i860? */
2414 internal_a.magic = 0;
2415 #define __A_MAGIC_SET__
2418 internal_a.magic = (magic == I960ROMAGIC ? NMAGIC : OMAGIC);
2419 #define __A_MAGIC_SET__
2422 #define __A_MAGIC_SET__
2423 internal_a.magic = PAGEMAGICBCS;
2427 #define __A_MAGIC_SET__
2428 internal_a.magic = APOLLO_COFF_VERSION_NUMBER;
2431 #if defined(M68) || defined(WE32K) || defined(M68K)
2432 #define __A_MAGIC_SET__
2434 internal_a.magic = LYNXCOFFMAGIC;
2436 #if defined (PAGEMAGICPEXECPAGED)
2437 internal_a.magic = PAGEMAGICPEXECPAGED;
2440 #endif /* M68 || WE32K || M68K */
2443 #define __A_MAGIC_SET__
2444 internal_a.magic = ZMAGIC;
2447 #define __A_MAGIC_SET__
2448 internal_a.magic = IMAGE_NT_OPTIONAL_HDR_MAGIC;
2451 #define __A_MAGIC_SET__
2453 internal_a.magic = LYNXCOFFMAGIC;
2455 internal_a.magic = ZMAGIC;
2460 #define __A_MAGIC_SET__
2462 internal_a.magic = LYNXCOFFMAGIC;
2467 #define __A_MAGIC_SET__
2468 internal_a.magic = (abfd->flags & D_PAGED) ? RS6K_AOUTHDR_ZMAGIC :
2469 (abfd->flags & WP_TEXT) ? RS6K_AOUTHDR_NMAGIC :
2470 RS6K_AOUTHDR_OMAGIC;
2473 #ifndef __A_MAGIC_SET__
2474 #include "Your aouthdr magic number is not being set!"
2476 #undef __A_MAGIC_SET__
2480 /* FIXME: Does anybody ever set this to another value? */
2481 internal_a.vstamp = 0;
2483 /* Now should write relocs, strings, syms */
2484 obj_sym_filepos (abfd) = sym_base;
2486 if (bfd_get_symcount (abfd) != 0)
2489 #ifndef RS6000COFF_C
2490 if (!coff_add_missing_symbols (abfd))
2493 if (!coff_renumber_symbols (abfd, &firstundef))
2495 coff_mangle_symbols (abfd);
2496 if (! coff_write_symbols (abfd))
2498 if (! coff_write_linenumbers (abfd))
2500 if (! coff_write_relocs (abfd, firstundef))
2503 #ifdef COFF_IMAGE_WITH_PE
2505 else if ((abfd->flags & EXEC_P) != 0)
2509 /* PowerPC PE appears to require that all executable files be
2510 rounded up to the page size. */
2513 BFD_ALIGN (sym_base, COFF_PAGE_SIZE) - 1,
2515 || bfd_write (&b, 1, 1, abfd) != 1)
2521 /* If bfd_get_symcount (abfd) != 0, then we are not using the COFF
2522 backend linker, and obj_raw_syment_count is not valid until after
2523 coff_write_symbols is called. */
2524 if (obj_raw_syment_count (abfd) != 0)
2526 internal_f.f_symptr = sym_base;
2528 /* AIX appears to require that F_RELFLG not be set if there are
2529 local symbols but no relocations. */
2530 internal_f.f_flags &=~ F_RELFLG;
2535 internal_f.f_symptr = 0;
2536 internal_f.f_flags |= F_LSYMS;
2541 internal_a.tsize = bfd_get_section_size_before_reloc (text_sec);
2542 internal_a.text_start = internal_a.tsize ? text_sec->vma : 0;
2546 internal_a.dsize = bfd_get_section_size_before_reloc (data_sec);
2547 internal_a.data_start = internal_a.dsize ? data_sec->vma : 0;
2551 internal_a.bsize = bfd_get_section_size_before_reloc (bss_sec);
2552 if (internal_a.bsize && bss_sec->vma < internal_a.data_start)
2553 internal_a.data_start = bss_sec->vma;
2556 internal_a.entry = bfd_get_start_address (abfd);
2557 internal_f.f_nsyms = obj_raw_syment_count (abfd);
2560 if (xcoff_data (abfd)->full_aouthdr)
2563 asection *loader_sec;
2565 internal_a.vstamp = 1;
2567 if (xcoff_data (abfd)->entry_section != NULL)
2568 internal_a.o_snentry = xcoff_data (abfd)->entry_section->target_index;
2571 internal_a.o_snentry = 0;
2572 internal_a.entry = (bfd_vma) -1;
2575 if (text_sec != NULL)
2577 internal_a.o_sntext = text_sec->target_index;
2578 internal_a.o_algntext = bfd_get_section_alignment (abfd, text_sec);
2582 internal_a.o_sntext = 0;
2583 internal_a.o_algntext = 0;
2585 if (data_sec != NULL)
2587 internal_a.o_sndata = data_sec->target_index;
2588 internal_a.o_algndata = bfd_get_section_alignment (abfd, data_sec);
2592 internal_a.o_sndata = 0;
2593 internal_a.o_algndata = 0;
2595 loader_sec = bfd_get_section_by_name (abfd, ".loader");
2596 if (loader_sec != NULL)
2597 internal_a.o_snloader = loader_sec->target_index;
2599 internal_a.o_snloader = 0;
2600 if (bss_sec != NULL)
2601 internal_a.o_snbss = bss_sec->target_index;
2603 internal_a.o_snbss = 0;
2605 toc = xcoff_data (abfd)->toc;
2606 internal_a.o_toc = toc;
2607 if (xcoff_data (abfd)->toc_section == NULL)
2608 internal_a.o_sntoc = 0;
2610 internal_a.o_sntoc = xcoff_data (abfd)->toc_section->target_index;
2612 internal_a.o_modtype = xcoff_data (abfd)->modtype;
2613 if (xcoff_data (abfd)->cputype != -1)
2614 internal_a.o_cputype = xcoff_data (abfd)->cputype;
2617 switch (bfd_get_arch (abfd))
2619 case bfd_arch_rs6000:
2620 internal_a.o_cputype = 4;
2622 case bfd_arch_powerpc:
2623 if (bfd_get_mach (abfd) == 0)
2624 internal_a.o_cputype = 3;
2626 internal_a.o_cputype = 1;
2632 internal_a.o_maxstack = xcoff_data (abfd)->maxstack;
2633 internal_a.o_maxdata = xcoff_data (abfd)->maxdata;
2637 /* now write them */
2638 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
2642 coff_swap_filehdr_out (abfd, (PTR) & internal_f, (PTR) & buff);
2643 if (bfd_write ((PTR) & buff, 1, FILHSZ, abfd) != FILHSZ)
2646 if (abfd->flags & EXEC_P)
2649 coff_swap_aouthdr_out (abfd, (PTR) & internal_a, (PTR) & buff);
2650 if (bfd_write ((PTR) & buff, 1, AOUTSZ, abfd) != AOUTSZ)
2659 /* XCOFF seems to always write at least a small a.out header. */
2660 coff_swap_aouthdr_out (abfd, (PTR) &internal_a, (PTR) &buff);
2661 if (xcoff_data (abfd)->full_aouthdr)
2664 size = SMALL_AOUTSZ;
2665 if (bfd_write ((PTR) &buff, 1, size, abfd) != size)
2674 coff_set_section_contents (abfd, section, location, offset, count)
2679 bfd_size_type count;
2681 if (abfd->output_has_begun == false) /* set by bfd.c handler */
2682 coff_compute_section_file_positions (abfd);
2685 /* If this is a .lib section, bump the vma address so that it
2686 winds up being the number of .lib sections output. This is
2687 right for SVR3.2. Shared libraries should probably get more
2689 if (strcmp (section->name, _LIB) == 0)
2693 /* Don't write out bss sections - one way to do this is to
2694 see if the filepos has not been set. */
2695 if (section->filepos == 0)
2698 if (bfd_seek (abfd, (file_ptr) (section->filepos + offset), SEEK_SET) != 0)
2703 return (bfd_write (location, 1, count, abfd) == count) ? true : false;
2709 coff_close_and_cleanup (abfd)
2712 if (!bfd_read_p (abfd))
2713 switch (abfd->format)
2716 if (!_bfd_write_archive_contents (abfd))
2720 if (!coff_write_object_contents (abfd))
2724 bfd_set_error (bfd_error_invalid_operation);
2728 /* We depend on bfd_close to free all the memory on the obstack. */
2729 /* FIXME if bfd_release is not using obstacks! */
2736 buy_and_read (abfd, where, seek_direction, size)
2742 PTR area = (PTR) bfd_alloc (abfd, size);
2745 if (bfd_seek (abfd, where, seek_direction) != 0
2746 || bfd_read (area, 1, size, abfd) != size)
2749 } /* buy_and_read() */
2755 Creating the linenumber table is done by reading in the entire
2756 coff linenumber table, and creating another table for internal use.
2758 A coff linenumber table is structured so that each function
2759 is marked as having a line number of 0. Each line within the
2760 function is an offset from the first line in the function. The
2761 base of the line number information for the table is stored in
2762 the symbol associated with the function.
2764 The information is copied from the external to the internal
2765 table, and each symbol which marks a function is marked by
2768 How does this work ?
2773 coff_slurp_line_table (abfd, asect)
2777 LINENO *native_lineno;
2778 alent *lineno_cache;
2780 BFD_ASSERT (asect->lineno == (alent *) NULL);
2782 native_lineno = (LINENO *) buy_and_read (abfd,
2783 asect->line_filepos,
2786 asect->lineno_count));
2788 (alent *) bfd_alloc (abfd, (size_t) ((asect->lineno_count + 1) * sizeof (alent)));
2789 if (lineno_cache == NULL)
2793 unsigned int counter = 0;
2794 alent *cache_ptr = lineno_cache;
2795 LINENO *src = native_lineno;
2797 while (counter < asect->lineno_count)
2799 struct internal_lineno dst;
2800 coff_swap_lineno_in (abfd, src, &dst);
2801 cache_ptr->line_number = dst.l_lnno;
2803 if (cache_ptr->line_number == 0)
2805 coff_symbol_type *sym =
2806 (coff_symbol_type *) (dst.l_addr.l_symndx
2807 + obj_raw_syments (abfd))->u.syment._n._n_n._n_zeroes;
2808 cache_ptr->u.sym = (asymbol *) sym;
2809 if (sym->lineno != NULL)
2811 (*_bfd_error_handler)
2812 ("%s: warning: duplicate line number information for `%s'",
2813 bfd_get_filename (abfd),
2814 bfd_asymbol_name (&sym->symbol));
2816 sym->lineno = cache_ptr;
2820 cache_ptr->u.offset = dst.l_addr.l_paddr
2821 - bfd_section_vma (abfd, asect);
2822 } /* If no linenumber expect a symbol index */
2828 cache_ptr->line_number = 0;
2831 asect->lineno = lineno_cache;
2832 /* FIXME, free native_lineno here, or use alloca or something. */
2837 coff_slurp_symbol_table (abfd)
2840 combined_entry_type *native_symbols;
2841 coff_symbol_type *cached_area;
2842 unsigned int *table_ptr;
2844 unsigned int number_of_symbols = 0;
2846 if (obj_symbols (abfd))
2849 /* Read in the symbol table */
2850 if ((native_symbols = coff_get_normalized_symtab (abfd)) == NULL)
2855 /* Allocate enough room for all the symbols in cached form */
2856 cached_area = ((coff_symbol_type *)
2858 (obj_raw_syment_count (abfd)
2859 * sizeof (coff_symbol_type))));
2861 if (cached_area == NULL)
2863 table_ptr = ((unsigned int *)
2865 (obj_raw_syment_count (abfd)
2866 * sizeof (unsigned int))));
2868 if (table_ptr == NULL)
2872 coff_symbol_type *dst = cached_area;
2873 unsigned int last_native_index = obj_raw_syment_count (abfd);
2874 unsigned int this_index = 0;
2875 while (this_index < last_native_index)
2877 combined_entry_type *src = native_symbols + this_index;
2878 table_ptr[this_index] = number_of_symbols;
2879 dst->symbol.the_bfd = abfd;
2881 dst->symbol.name = (char *) (src->u.syment._n._n_n._n_offset);
2882 /* We use the native name field to point to the cached field. */
2883 src->u.syment._n._n_n._n_zeroes = (long) dst;
2884 dst->symbol.section = coff_section_from_bfd_index (abfd,
2885 src->u.syment.n_scnum);
2886 dst->symbol.flags = 0;
2887 dst->done_lineno = false;
2889 switch (src->u.syment.n_sclass)
2894 dst->symbol.value = src->u.syment.n_value - dst->symbol.section->vma;
2895 dst->symbol.flags = BSF_EXPORT | BSF_GLOBAL;
2896 dst->symbol.flags |= BSF_NOT_AT_END | BSF_FUNCTION;
2898 /* Fall through to next case */
2907 /* PE uses storage class 0x68 to denote a section symbol */
2909 /* PE uses storage class 0x67 for a weak external symbol. */
2912 if ((src->u.syment.n_scnum) == 0)
2914 if ((src->u.syment.n_value) == 0)
2916 dst->symbol.section = bfd_und_section_ptr;
2917 dst->symbol.value = 0;
2921 dst->symbol.section = bfd_com_section_ptr;
2922 dst->symbol.value = (src->u.syment.n_value);
2927 /* Base the value as an index from the base of the
2930 dst->symbol.flags = BSF_EXPORT | BSF_GLOBAL;
2931 dst->symbol.value = (src->u.syment.n_value
2932 - dst->symbol.section->vma);
2934 if (ISFCN ((src->u.syment.n_type)))
2936 /* A function ext does not go at the end of a
2938 dst->symbol.flags |= BSF_NOT_AT_END | BSF_FUNCTION;
2943 /* A C_HIDEXT symbol is not global. */
2944 if (src->u.syment.n_sclass == C_HIDEXT)
2945 dst->symbol.flags = BSF_LOCAL;
2946 /* A symbol with a csect entry should not go at the end. */
2947 if (src->u.syment.n_numaux > 0)
2948 dst->symbol.flags |= BSF_NOT_AT_END;
2952 if (src->u.syment.n_sclass == C_NT_WEAK)
2953 dst->symbol.flags = BSF_WEAK;
2958 case C_STAT: /* static */
2960 case C_LEAFSTAT: /* static leaf procedure */
2962 case C_LABEL: /* label */
2963 if (src->u.syment.n_scnum == -2)
2964 dst->symbol.flags = BSF_DEBUGGING;
2966 dst->symbol.flags = BSF_LOCAL;
2968 Base the value as an index from the base of the section, if
2971 if (dst->symbol.section)
2972 dst->symbol.value = (src->u.syment.n_value) -
2973 dst->symbol.section->vma;
2975 dst->symbol.value = (src->u.syment.n_value);
2978 case C_MOS: /* member of structure */
2979 case C_EOS: /* end of structure */
2980 #ifdef NOTDEF /* C_AUTOARG has the same value */
2982 case C_GLBLREG: /* A29k-specific storage class */
2985 case C_REGPARM: /* register parameter */
2986 case C_REG: /* register variable */
2988 case C_AUTOARG: /* 960-specific storage class */
2990 case C_TPDEF: /* type definition */
2992 case C_AUTO: /* automatic variable */
2993 case C_FIELD: /* bit field */
2994 case C_ENTAG: /* enumeration tag */
2995 case C_MOE: /* member of enumeration */
2996 case C_MOU: /* member of union */
2997 case C_UNTAG: /* union tag */
2998 dst->symbol.flags = BSF_DEBUGGING;
2999 dst->symbol.value = (src->u.syment.n_value);
3002 case C_FILE: /* file name */
3003 case C_STRTAG: /* structure tag */
3018 dst->symbol.flags = BSF_DEBUGGING;
3019 dst->symbol.value = (src->u.syment.n_value);
3023 case C_BINCL: /* beginning of include file */
3024 case C_EINCL: /* ending of include file */
3025 /* The value is actually a pointer into the line numbers
3026 of the file. We locate the line number entry, and
3027 set the section to the section which contains it, and
3028 the value to the index in that section. */
3032 dst->symbol.flags = BSF_DEBUGGING;
3033 for (sec = abfd->sections; sec != NULL; sec = sec->next)
3034 if (sec->line_filepos <= (file_ptr) src->u.syment.n_value
3035 && ((file_ptr) (sec->line_filepos
3036 + sec->lineno_count * LINESZ)
3037 > (file_ptr) src->u.syment.n_value))
3040 dst->symbol.value = 0;
3043 dst->symbol.section = sec;
3044 dst->symbol.value = ((src->u.syment.n_value
3045 - sec->line_filepos)
3053 dst->symbol.flags = BSF_DEBUGGING;
3055 /* The value is actually a symbol index. Save a pointer
3056 to the symbol instead of the index. FIXME: This
3057 should use a union. */
3058 src->u.syment.n_value =
3059 (long) (native_symbols + src->u.syment.n_value);
3060 dst->symbol.value = src->u.syment.n_value;
3065 case C_BLOCK: /* ".bb" or ".eb" */
3066 case C_FCN: /* ".bf" or ".ef" */
3067 case C_EFCN: /* physical end of function */
3068 dst->symbol.flags = BSF_LOCAL;
3070 Base the value as an index from the base of the section
3072 dst->symbol.value = (src->u.syment.n_value) - dst->symbol.section->vma;
3076 case C_EXTDEF: /* external definition */
3077 case C_ULABEL: /* undefined label */
3078 case C_USTATIC: /* undefined static */
3079 #ifndef COFF_WITH_PE
3080 /* C_LINE in regular coff is 0x68. NT has taken over this storage
3081 class to represent a section symbol */
3082 case C_LINE: /* line # reformatted as symbol table entry */
3083 /* NT uses 0x67 for a weak symbol, not C_ALIAS. */
3084 case C_ALIAS: /* duplicate tag */
3086 case C_HIDDEN: /* ext symbol in dmert public lib */
3088 (*_bfd_error_handler)
3089 ("%s: Unrecognized storage class %d for %s symbol `%s'",
3090 bfd_get_filename (abfd), src->u.syment.n_sclass,
3091 dst->symbol.section->name, dst->symbol.name);
3092 dst->symbol.flags = BSF_DEBUGGING;
3093 dst->symbol.value = (src->u.syment.n_value);
3097 /* BFD_ASSERT(dst->symbol.flags != 0);*/
3101 dst->symbol.udata.i = 0;
3102 dst->lineno = (alent *) NULL;
3103 this_index += (src->u.syment.n_numaux) + 1;
3105 number_of_symbols++;
3106 } /* walk the native symtab */
3107 } /* bfdize the native symtab */
3109 obj_symbols (abfd) = cached_area;
3110 obj_raw_syments (abfd) = native_symbols;
3112 bfd_get_symcount (abfd) = number_of_symbols;
3113 obj_convert (abfd) = table_ptr;
3114 /* Slurp the line tables for each section too */
3120 coff_slurp_line_table (abfd, p);
3125 } /* coff_slurp_symbol_table() */
3127 /* Check whether a symbol is globally visible. This is used by the
3128 COFF backend linker code in cofflink.c, since a couple of targets
3129 have globally visible symbols which are not class C_EXT. This
3130 function need not handle the case of n_class == C_EXT. */
3132 #undef OTHER_GLOBAL_CLASS
3135 #define OTHER_GLOBAL_CLASS C_LEAFEXT
3139 #define OTHER_GLOBAL_CLASS C_SECTION
3142 #ifdef OTHER_GLOBAL_CLASS
3145 coff_sym_is_global (abfd, syment)
3147 struct internal_syment *syment;
3149 if (syment->n_sclass == OTHER_GLOBAL_CLASS)
3154 #undef OTHER_GLOBAL_CLASS
3156 #else /* ! defined (OTHER_GLOBAL_CLASS) */
3158 /* sym_is_global should not be defined if it has nothing to do. */
3160 #define coff_sym_is_global 0
3162 #endif /* ! defined (OTHER_GLOBAL_CLASS) */
3168 Coff relocations are easily transformed into the internal BFD form
3171 Reading a coff relocation table is done in the following stages:
3173 o Read the entire coff relocation table into memory.
3175 o Process each relocation in turn; first swap it from the
3176 external to the internal form.
3178 o Turn the symbol referenced in the relocation's symbol index
3179 into a pointer into the canonical symbol table.
3180 This table is the same as the one returned by a call to
3181 @code{bfd_canonicalize_symtab}. The back end will call that
3182 routine and save the result if a canonicalization hasn't been done.
3184 o The reloc index is turned into a pointer to a howto
3185 structure, in a back end specific way. For instance, the 386
3186 and 960 use the @code{r_type} to directly produce an index
3187 into a howto table vector; the 88k subtracts a number from the
3188 @code{r_type} field and creates an addend field.
3194 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
3196 coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \
3197 if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
3198 coffsym = (obj_symbols (abfd) \
3199 + (cache_ptr->sym_ptr_ptr - symbols)); \
3201 coffsym = coff_symbol_from (abfd, ptr); \
3202 if (coffsym != (coff_symbol_type *) NULL \
3203 && coffsym->native->u.syment.n_scnum == 0) \
3204 cache_ptr->addend = 0; \
3205 else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
3206 && ptr->section != (asection *) NULL) \
3207 cache_ptr->addend = - (ptr->section->vma + ptr->value); \
3209 cache_ptr->addend = 0; \
3214 coff_slurp_reloc_table (abfd, asect, symbols)
3219 RELOC *native_relocs;
3220 arelent *reloc_cache;
3225 if (asect->relocation)
3227 if (asect->reloc_count == 0)
3229 if (asect->flags & SEC_CONSTRUCTOR)
3231 if (!coff_slurp_symbol_table (abfd))
3234 (RELOC *) buy_and_read (abfd,
3238 asect->reloc_count));
3239 reloc_cache = (arelent *)
3240 bfd_alloc (abfd, (size_t) (asect->reloc_count * sizeof (arelent)));
3242 if (reloc_cache == NULL)
3246 for (idx = 0; idx < asect->reloc_count; idx++)
3248 #ifdef RELOC_PROCESSING
3249 struct internal_reloc dst;
3250 struct external_reloc *src;
3252 cache_ptr = reloc_cache + idx;
3253 src = native_relocs + idx;
3254 coff_swap_reloc_in (abfd, src, &dst);
3256 RELOC_PROCESSING (cache_ptr, &dst, symbols, abfd, asect);
3258 struct internal_reloc dst;
3260 struct external_reloc *src;
3262 cache_ptr = reloc_cache + idx;
3263 src = native_relocs + idx;
3265 coff_swap_reloc_in (abfd, src, &dst);
3268 cache_ptr->address = dst.r_vaddr;
3270 if (dst.r_symndx != -1)
3272 /* @@ Should never be greater than count of symbols! */
3273 if (dst.r_symndx >= obj_conv_table_size (abfd))
3275 cache_ptr->sym_ptr_ptr = symbols + obj_convert (abfd)[dst.r_symndx];
3276 ptr = *(cache_ptr->sym_ptr_ptr);
3280 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
3284 /* The symbols definitions that we have read in have been
3285 relocated as if their sections started at 0. But the offsets
3286 refering to the symbols in the raw data have not been
3287 modified, so we have to have a negative addend to compensate.
3289 Note that symbols which used to be common must be left alone */
3291 /* Calculate any reloc addend by looking at the symbol */
3292 CALC_ADDEND (abfd, ptr, dst, cache_ptr);
3294 cache_ptr->address -= asect->vma;
3295 /* !! cache_ptr->section = (asection *) NULL;*/
3297 /* Fill in the cache_ptr->howto field from dst.r_type */
3298 RTYPE2HOWTO (cache_ptr, &dst);
3303 asect->relocation = reloc_cache;
3307 #ifndef coff_rtype_to_howto
3310 /* Get the howto structure for a reloc. This is only used if the file
3311 including this one defines coff_relocate_section to be
3312 _bfd_coff_generic_relocate_section, so it is OK if it does not
3313 always work. It is the responsibility of the including file to
3314 make sure it is reasonable if it is needed. */
3316 static reloc_howto_type *coff_rtype_to_howto
3317 PARAMS ((bfd *, asection *, struct internal_reloc *,
3318 struct coff_link_hash_entry *, struct internal_syment *,
3322 static reloc_howto_type *
3323 coff_rtype_to_howto (abfd, sec, rel, h, sym, addendp)
3326 struct internal_reloc *rel;
3327 struct coff_link_hash_entry *h;
3328 struct internal_syment *sym;
3333 RTYPE2HOWTO (&genrel, rel);
3334 return genrel.howto;
3337 #else /* ! defined (RTYPE2HOWTO) */
3339 #define coff_rtype_to_howto NULL
3341 #endif /* ! defined (RTYPE2HOWTO) */
3342 #endif /* ! defined (coff_rtype_to_howto) */
3344 /* This is stupid. This function should be a boolean predicate. */
3346 coff_canonicalize_reloc (abfd, section, relptr, symbols)
3352 arelent *tblptr = section->relocation;
3353 unsigned int count = 0;
3356 if (section->flags & SEC_CONSTRUCTOR)
3358 /* this section has relocs made up by us, they are not in the
3359 file, so take them out of their chain and place them into
3360 the data area provided */
3361 arelent_chain *chain = section->constructor_chain;
3362 for (count = 0; count < section->reloc_count; count++)
3364 *relptr++ = &chain->relent;
3365 chain = chain->next;
3371 if (! coff_slurp_reloc_table (abfd, section, symbols))
3374 tblptr = section->relocation;
3376 for (; count++ < section->reloc_count;)
3377 *relptr++ = tblptr++;
3382 return section->reloc_count;
3387 coff_sym_filepos (abfd)
3390 return obj_sym_filepos (abfd);
3394 #ifndef coff_reloc16_estimate
3395 #define coff_reloc16_estimate dummy_reloc16_estimate
3398 dummy_reloc16_estimate (abfd, input_section, reloc, shrink, link_info)
3400 asection *input_section;
3402 unsigned int shrink;
3403 struct bfd_link_info *link_info;
3410 #ifndef coff_reloc16_extra_cases
3411 #define coff_reloc16_extra_cases dummy_reloc16_extra_cases
3412 /* This works even if abort is not declared in any header file. */
3414 dummy_reloc16_extra_cases (abfd, link_info, link_order, reloc, data, src_ptr,
3417 struct bfd_link_info *link_info;
3418 struct bfd_link_order *link_order;
3421 unsigned int *src_ptr;
3422 unsigned int *dst_ptr;
3428 /* If coff_relocate_section is defined, we can use the optimized COFF
3429 backend linker. Otherwise we must continue to use the old linker. */
3430 #ifdef coff_relocate_section
3431 #ifndef coff_bfd_link_hash_table_create
3432 #define coff_bfd_link_hash_table_create _bfd_coff_link_hash_table_create
3434 #ifndef coff_bfd_link_add_symbols
3435 #define coff_bfd_link_add_symbols _bfd_coff_link_add_symbols
3437 #ifndef coff_bfd_final_link
3438 #define coff_bfd_final_link _bfd_coff_final_link
3440 #else /* ! defined (coff_relocate_section) */
3441 #define coff_relocate_section NULL
3442 #define coff_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
3443 #define coff_bfd_link_add_symbols _bfd_generic_link_add_symbols
3444 #define coff_bfd_final_link _bfd_generic_final_link
3445 #endif /* ! defined (coff_relocate_section) */
3446 #define coff_bfd_link_split_section _bfd_generic_link_split_section
3448 #ifndef coff_start_final_link
3449 #define coff_start_final_link NULL
3452 #ifndef coff_adjust_symndx
3453 #define coff_adjust_symndx NULL
3456 static CONST bfd_coff_backend_data bfd_coff_std_swap_table =
3458 coff_swap_aux_in, coff_swap_sym_in, coff_swap_lineno_in,
3459 coff_swap_aux_out, coff_swap_sym_out,
3460 coff_swap_lineno_out, coff_swap_reloc_out,
3461 coff_swap_filehdr_out, coff_swap_aouthdr_out,
3462 coff_swap_scnhdr_out,
3463 FILHSZ, AOUTSZ, SCNHSZ, SYMESZ, AUXESZ, RELSZ, LINESZ,
3464 #ifdef COFF_LONG_FILENAMES
3469 coff_swap_filehdr_in, coff_swap_aouthdr_in, coff_swap_scnhdr_in,
3470 coff_swap_reloc_in, coff_bad_format_hook, coff_set_arch_mach_hook,
3471 coff_mkobject_hook, styp_to_sec_flags, coff_set_alignment_hook,
3472 coff_slurp_symbol_table, symname_in_debug_hook, coff_pointerize_aux_hook,
3473 coff_print_aux, coff_reloc16_extra_cases, coff_reloc16_estimate,
3474 coff_sym_is_global, coff_compute_section_file_positions,
3475 coff_start_final_link, coff_relocate_section, coff_rtype_to_howto,
3479 #define coff_close_and_cleanup _bfd_generic_close_and_cleanup
3480 #define coff_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
3481 #define coff_get_section_contents _bfd_generic_get_section_contents
3483 #ifndef coff_bfd_copy_private_symbol_data
3484 #define coff_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data
3487 #ifndef coff_bfd_copy_private_section_data
3488 #define coff_bfd_copy_private_section_data _bfd_generic_bfd_copy_private_section_data
3491 #ifndef coff_bfd_copy_private_bfd_data
3492 #define coff_bfd_copy_private_bfd_data _bfd_generic_bfd_copy_private_bfd_data
3495 #define coff_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
3496 #define coff_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
3498 #ifndef coff_bfd_print_private_bfd_data
3499 #define coff_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data
3502 #ifndef coff_bfd_is_local_label
3503 #define coff_bfd_is_local_label bfd_generic_is_local_label
3505 #ifndef coff_read_minisymbols
3506 #define coff_read_minisymbols _bfd_generic_read_minisymbols
3508 #ifndef coff_minisymbol_to_symbol
3509 #define coff_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
3512 /* The reloc lookup routine must be supplied by each individual COFF
3514 #ifndef coff_bfd_reloc_type_lookup
3515 #define coff_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
3518 #ifndef coff_bfd_get_relocated_section_contents
3519 #define coff_bfd_get_relocated_section_contents \
3520 bfd_generic_get_relocated_section_contents
3522 #ifndef coff_bfd_relax_section
3523 #define coff_bfd_relax_section bfd_generic_relax_section