1 /* Support for the generic parts of most COFF variants, for BFD.
2 Copyright 1990, 91, 92, 93, 94, 95, 96, 97, 1998
3 Free Software Foundation, Inc.
4 Written by Cygnus Support.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
23 Most of this hacked by Steve Chamberlain,
31 BFD supports a number of different flavours of coff format.
32 The major differences between formats are the sizes and
33 alignments of fields in structures on disk, and the occasional
36 Coff in all its varieties is implemented with a few common
37 files and a number of implementation specific files. For
38 example, The 88k bcs coff format is implemented in the file
39 @file{coff-m88k.c}. This file @code{#include}s
40 @file{coff/m88k.h} which defines the external structure of the
41 coff format for the 88k, and @file{coff/internal.h} which
42 defines the internal structure. @file{coff-m88k.c} also
43 defines the relocations used by the 88k format
46 The Intel i960 processor version of coff is implemented in
47 @file{coff-i960.c}. This file has the same structure as
48 @file{coff-m88k.c}, except that it includes @file{coff/i960.h}
49 rather than @file{coff-m88k.h}.
52 Porting to a new version of coff
54 The recommended method is to select from the existing
55 implementations the version of coff which is most like the one
56 you want to use. For example, we'll say that i386 coff is
57 the one you select, and that your coff flavour is called foo.
58 Copy @file{i386coff.c} to @file{foocoff.c}, copy
59 @file{../include/coff/i386.h} to @file{../include/coff/foo.h},
60 and add the lines to @file{targets.c} and @file{Makefile.in}
61 so that your new back end is used. Alter the shapes of the
62 structures in @file{../include/coff/foo.h} so that they match
63 what you need. You will probably also have to add
64 @code{#ifdef}s to the code in @file{coff/internal.h} and
65 @file{coffcode.h} if your version of coff is too wild.
67 You can verify that your new BFD backend works quite simply by
68 building @file{objdump} from the @file{binutils} directory,
69 and making sure that its version of what's going on and your
70 host system's idea (assuming it has the pretty standard coff
71 dump utility, usually called @code{att-dump} or just
72 @code{dump}) are the same. Then clean up your code, and send
73 what you've done to Cygnus. Then your stuff will be in the
74 next release, and you won't have to keep integrating it.
77 How the coff backend works
82 The Coff backend is split into generic routines that are
83 applicable to any Coff target and routines that are specific
84 to a particular target. The target-specific routines are
85 further split into ones which are basically the same for all
86 Coff targets except that they use the external symbol format
87 or use different values for certain constants.
89 The generic routines are in @file{coffgen.c}. These routines
90 work for any Coff target. They use some hooks into the target
91 specific code; the hooks are in a @code{bfd_coff_backend_data}
92 structure, one of which exists for each target.
94 The essentially similar target-specific routines are in
95 @file{coffcode.h}. This header file includes executable C code.
96 The various Coff targets first include the appropriate Coff
97 header file, make any special defines that are needed, and
98 then include @file{coffcode.h}.
100 Some of the Coff targets then also have additional routines in
101 the target source file itself.
103 For example, @file{coff-i960.c} includes
104 @file{coff/internal.h} and @file{coff/i960.h}. It then
105 defines a few constants, such as @code{I960}, and includes
106 @file{coffcode.h}. Since the i960 has complex relocation
107 types, @file{coff-i960.c} also includes some code to
108 manipulate the i960 relocs. This code is not in
109 @file{coffcode.h} because it would not be used by any other
115 Each flavour of coff supported in BFD has its own header file
116 describing the external layout of the structures. There is also
117 an internal description of the coff layout, in
118 @file{coff/internal.h}. A major function of the
119 coff backend is swapping the bytes and twiddling the bits to
120 translate the external form of the structures into the normal
121 internal form. This is all performed in the
122 @code{bfd_swap}_@i{thing}_@i{direction} routines. Some
123 elements are different sizes between different versions of
124 coff; it is the duty of the coff version specific include file
125 to override the definitions of various packing routines in
126 @file{coffcode.h}. E.g., the size of line number entry in coff is
127 sometimes 16 bits, and sometimes 32 bits. @code{#define}ing
128 @code{PUT_LNSZ_LNNO} and @code{GET_LNSZ_LNNO} will select the
129 correct one. No doubt, some day someone will find a version of
130 coff which has a varying field size not catered to at the
131 moment. To port BFD, that person will have to add more @code{#defines}.
132 Three of the bit twiddling routines are exported to
133 @code{gdb}; @code{coff_swap_aux_in}, @code{coff_swap_sym_in}
134 and @code{coff_swap_linno_in}. @code{GDB} reads the symbol
135 table on its own, but uses BFD to fix things up. More of the
136 bit twiddlers are exported for @code{gas};
137 @code{coff_swap_aux_out}, @code{coff_swap_sym_out},
138 @code{coff_swap_lineno_out}, @code{coff_swap_reloc_out},
139 @code{coff_swap_filehdr_out}, @code{coff_swap_aouthdr_out},
140 @code{coff_swap_scnhdr_out}. @code{Gas} currently keeps track
141 of all the symbol table and reloc drudgery itself, thereby
142 saving the internal BFD overhead, but uses BFD to swap things
143 on the way out, making cross ports much safer. Doing so also
144 allows BFD (and thus the linker) to use the same header files
145 as @code{gas}, which makes one avenue to disaster disappear.
150 The simple canonical form for symbols used by BFD is not rich
151 enough to keep all the information available in a coff symbol
152 table. The back end gets around this problem by keeping the original
153 symbol table around, "behind the scenes".
155 When a symbol table is requested (through a call to
156 @code{bfd_canonicalize_symtab}), a request gets through to
157 @code{coff_get_normalized_symtab}. This reads the symbol table from
158 the coff file and swaps all the structures inside into the
159 internal form. It also fixes up all the pointers in the table
160 (represented in the file by offsets from the first symbol in
161 the table) into physical pointers to elements in the new
162 internal table. This involves some work since the meanings of
163 fields change depending upon context: a field that is a
164 pointer to another structure in the symbol table at one moment
165 may be the size in bytes of a structure at the next. Another
166 pass is made over the table. All symbols which mark file names
167 (<<C_FILE>> symbols) are modified so that the internal
168 string points to the value in the auxent (the real filename)
169 rather than the normal text associated with the symbol
172 At this time the symbol names are moved around. Coff stores
173 all symbols less than nine characters long physically
174 within the symbol table; longer strings are kept at the end of
175 the file in the string table. This pass moves all strings
176 into memory and replaces them with pointers to the strings.
179 The symbol table is massaged once again, this time to create
180 the canonical table used by the BFD application. Each symbol
181 is inspected in turn, and a decision made (using the
182 @code{sclass} field) about the various flags to set in the
183 @code{asymbol}. @xref{Symbols}. The generated canonical table
184 shares strings with the hidden internal symbol table.
186 Any linenumbers are read from the coff file too, and attached
187 to the symbols which own the functions the linenumbers belong to.
192 Writing a symbol to a coff file which didn't come from a coff
193 file will lose any debugging information. The @code{asymbol}
194 structure remembers the BFD from which the symbol was taken, and on
195 output the back end makes sure that the same destination target as
196 source target is present.
198 When the symbols have come from a coff file then all the
199 debugging information is preserved.
201 Symbol tables are provided for writing to the back end in a
202 vector of pointers to pointers. This allows applications like
203 the linker to accumulate and output large symbol tables
204 without having to do too much byte copying.
206 This function runs through the provided symbol table and
207 patches each symbol marked as a file place holder
208 (@code{C_FILE}) to point to the next file place holder in the
209 list. It also marks each @code{offset} field in the list with
210 the offset from the first symbol of the current symbol.
212 Another function of this procedure is to turn the canonical
213 value form of BFD into the form used by coff. Internally, BFD
214 expects symbol values to be offsets from a section base; so a
215 symbol physically at 0x120, but in a section starting at
216 0x100, would have the value 0x20. Coff expects symbols to
217 contain their final value, so symbols have their values
218 changed at this point to reflect their sum with their owning
219 section. This transformation uses the
220 <<output_section>> field of the @code{asymbol}'s
221 @code{asection} @xref{Sections}.
223 o <<coff_mangle_symbols>>
225 This routine runs though the provided symbol table and uses
226 the offsets generated by the previous pass and the pointers
227 generated when the symbol table was read in to create the
228 structured hierachy required by coff. It changes each pointer
229 to a symbol into the index into the symbol table of the asymbol.
231 o <<coff_write_symbols>>
233 This routine runs through the symbol table and patches up the
234 symbols from their internal form into the coff way, calls the
235 bit twiddlers, and writes out the table to the file.
244 The hidden information for an <<asymbol>> is described in a
245 <<combined_entry_type>>:
249 .typedef struct coff_ptr_struct
252 . {* Remembers the offset from the first symbol in the file for
253 . this symbol. Generated by coff_renumber_symbols. *}
254 .unsigned int offset;
256 . {* Should the value of this symbol be renumbered. Used for
257 . XCOFF C_BSTAT symbols. Set by coff_slurp_symbol_table. *}
258 .unsigned int fix_value : 1;
260 . {* Should the tag field of this symbol be renumbered.
261 . Created by coff_pointerize_aux. *}
262 .unsigned int fix_tag : 1;
264 . {* Should the endidx field of this symbol be renumbered.
265 . Created by coff_pointerize_aux. *}
266 .unsigned int fix_end : 1;
268 . {* Should the x_csect.x_scnlen field be renumbered.
269 . Created by coff_pointerize_aux. *}
270 .unsigned int fix_scnlen : 1;
272 . {* Fix up an XCOFF C_BINCL/C_EINCL symbol. The value is the
273 . index into the line number entries. Set by
274 . coff_slurp_symbol_table. *}
275 .unsigned int fix_line : 1;
277 . {* The container for the symbol structure as read and translated
281 . union internal_auxent auxent;
282 . struct internal_syment syment;
284 .} combined_entry_type;
287 .{* Each canonical asymbol really looks like this: *}
289 .typedef struct coff_symbol_struct
291 . {* The actual symbol which the rest of BFD works with *}
294 . {* A pointer to the hidden information for this symbol *}
295 .combined_entry_type *native;
297 . {* A pointer to the linenumber information for this symbol *}
298 .struct lineno_cache_entry *lineno;
300 . {* Have the line numbers been relocated yet ? *}
301 .boolean done_lineno;
310 #include "coffswap.h"
313 #define STRING_SIZE_SIZE (4)
315 static long sec_to_styp_flags PARAMS ((const char *, flagword));
316 static flagword styp_to_sec_flags PARAMS ((bfd *, PTR, const char *));
317 static boolean coff_bad_format_hook PARAMS ((bfd *, PTR));
318 static boolean coff_new_section_hook PARAMS ((bfd *, asection *));
319 static boolean coff_set_arch_mach_hook PARAMS ((bfd *, PTR));
320 static boolean coff_write_relocs PARAMS ((bfd *, int));
321 static boolean coff_set_flags
322 PARAMS ((bfd *, unsigned int *, unsigned short *));
323 static boolean coff_set_arch_mach
324 PARAMS ((bfd *, enum bfd_architecture, unsigned long));
325 static boolean coff_compute_section_file_positions PARAMS ((bfd *));
326 static boolean coff_write_object_contents PARAMS ((bfd *));
327 static boolean coff_set_section_contents
328 PARAMS ((bfd *, asection *, PTR, file_ptr, bfd_size_type));
329 static PTR buy_and_read PARAMS ((bfd *, file_ptr, int, size_t));
330 static boolean coff_slurp_line_table PARAMS ((bfd *, asection *));
331 static boolean coff_slurp_symbol_table PARAMS ((bfd *));
332 static boolean coff_slurp_reloc_table PARAMS ((bfd *, asection *, asymbol **));
333 static long coff_canonicalize_reloc
334 PARAMS ((bfd *, asection *, arelent **, asymbol **));
335 #ifndef coff_mkobject_hook
336 static PTR coff_mkobject_hook PARAMS ((bfd *, PTR, PTR));
339 /* void warning(); */
342 * Return a word with STYP_* (scnhdr.s_flags) flags set to represent the
343 * incoming SEC_* flags. The inverse of this function is styp_to_sec_flags().
344 * NOTE: If you add to/change this routine, you should mirror the changes
345 * in styp_to_sec_flags().
348 sec_to_styp_flags (sec_name, sec_flags)
349 CONST char *sec_name;
354 if (!strcmp (sec_name, _TEXT))
356 styp_flags = STYP_TEXT;
358 else if (!strcmp (sec_name, _DATA))
360 styp_flags = STYP_DATA;
362 else if (!strcmp (sec_name, _BSS))
364 styp_flags = STYP_BSS;
367 else if (!strcmp (sec_name, _COMMENT))
369 styp_flags = STYP_INFO;
370 #endif /* _COMMENT */
373 else if (!strcmp (sec_name, _LIB))
375 styp_flags = STYP_LIB;
379 else if (!strcmp (sec_name, _LIT))
381 styp_flags = STYP_LIT;
384 else if (!strcmp (sec_name, ".debug"))
387 styp_flags = STYP_DEBUG;
389 styp_flags = STYP_INFO;
392 else if (!strncmp (sec_name, ".stab", 5))
394 styp_flags = STYP_INFO;
397 else if (!strcmp (sec_name, ".edata"))
399 styp_flags = STYP_DATA;
403 else if (!strcmp (sec_name, _PAD))
405 styp_flags = STYP_PAD;
407 else if (!strcmp (sec_name, _LOADER))
409 styp_flags = STYP_LOADER;
412 /* Try and figure out what it should be */
413 else if (sec_flags & SEC_CODE)
415 styp_flags = STYP_TEXT;
417 else if (sec_flags & SEC_DATA)
419 styp_flags = STYP_DATA;
421 else if (sec_flags & SEC_READONLY)
423 #ifdef STYP_LIT /* 29k readonly text/data section */
424 styp_flags = STYP_LIT;
426 styp_flags = STYP_TEXT;
427 #endif /* STYP_LIT */
429 else if (sec_flags & SEC_LOAD)
431 styp_flags = STYP_TEXT;
433 else if (sec_flags & SEC_ALLOC)
435 styp_flags = STYP_BSS;
439 if ((sec_flags & (SEC_NEVER_LOAD | SEC_COFF_SHARED_LIBRARY)) != 0)
440 styp_flags |= STYP_NOLOAD;
444 if (sec_flags & SEC_LINK_ONCE)
445 styp_flags |= IMAGE_SCN_LNK_COMDAT;
451 * Return a word with SEC_* flags set to represent the incoming
452 * STYP_* flags (from scnhdr.s_flags). The inverse of this
453 * function is sec_to_styp_flags().
454 * NOTE: If you add to/change this routine, you should mirror the changes
455 * in sec_to_styp_flags().
458 styp_to_sec_flags (abfd, hdr, name)
463 struct internal_scnhdr *internal_s = (struct internal_scnhdr *) hdr;
464 long styp_flags = internal_s->s_flags;
465 flagword sec_flags = 0;
468 if (styp_flags & STYP_NOLOAD)
470 sec_flags |= SEC_NEVER_LOAD;
472 #endif /* STYP_NOLOAD */
474 /* For 386 COFF, at least, an unloadable text or data section is
475 actually a shared library section. */
476 if (styp_flags & STYP_TEXT)
478 if (sec_flags & SEC_NEVER_LOAD)
479 sec_flags |= SEC_CODE | SEC_COFF_SHARED_LIBRARY;
481 sec_flags |= SEC_CODE | SEC_LOAD | SEC_ALLOC;
483 else if (styp_flags & STYP_DATA)
485 if (sec_flags & SEC_NEVER_LOAD)
486 sec_flags |= SEC_DATA | SEC_COFF_SHARED_LIBRARY;
488 sec_flags |= SEC_DATA | SEC_LOAD | SEC_ALLOC;
490 else if (styp_flags & STYP_BSS)
492 #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
493 if (sec_flags & SEC_NEVER_LOAD)
494 sec_flags |= SEC_ALLOC | SEC_COFF_SHARED_LIBRARY;
497 sec_flags |= SEC_ALLOC;
499 else if (styp_flags & STYP_INFO)
501 /* We mark these as SEC_DEBUGGING, but only if COFF_PAGE_SIZE is
502 defined. coff_compute_section_file_positions uses
503 COFF_PAGE_SIZE to ensure that the low order bits of the
504 section VMA and the file offset match. If we don't know
505 COFF_PAGE_SIZE, we can't ensure the correct correspondence,
506 and demand page loading of the file will fail. */
507 #if defined (COFF_PAGE_SIZE) && !defined (COFF_ALIGN_IN_S_FLAGS)
508 sec_flags |= SEC_DEBUGGING;
511 else if (styp_flags & STYP_PAD)
515 else if (strcmp (name, _TEXT) == 0)
517 if (sec_flags & SEC_NEVER_LOAD)
518 sec_flags |= SEC_CODE | SEC_COFF_SHARED_LIBRARY;
520 sec_flags |= SEC_CODE | SEC_LOAD | SEC_ALLOC;
522 else if (strcmp (name, _DATA) == 0)
524 if (sec_flags & SEC_NEVER_LOAD)
525 sec_flags |= SEC_DATA | SEC_COFF_SHARED_LIBRARY;
527 sec_flags |= SEC_DATA | SEC_LOAD | SEC_ALLOC;
529 else if (strcmp (name, _BSS) == 0)
531 #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
532 if (sec_flags & SEC_NEVER_LOAD)
533 sec_flags |= SEC_ALLOC | SEC_COFF_SHARED_LIBRARY;
536 sec_flags |= SEC_ALLOC;
538 else if (strcmp (name, ".debug") == 0
540 || strcmp (name, _COMMENT) == 0
542 || strncmp (name, ".stab", 5) == 0)
544 #ifdef COFF_PAGE_SIZE
545 sec_flags |= SEC_DEBUGGING;
549 else if (strcmp (name, _LIB) == 0)
553 else if (strcmp (name, _LIT) == 0)
555 sec_flags = SEC_LOAD | SEC_ALLOC | SEC_READONLY;
560 sec_flags |= SEC_ALLOC | SEC_LOAD;
563 #ifdef STYP_LIT /* A29k readonly text/data section type */
564 if ((styp_flags & STYP_LIT) == STYP_LIT)
566 sec_flags = (SEC_LOAD | SEC_ALLOC | SEC_READONLY);
568 #endif /* STYP_LIT */
569 #ifdef STYP_OTHER_LOAD /* Other loaded sections */
570 if (styp_flags & STYP_OTHER_LOAD)
572 sec_flags = (SEC_LOAD | SEC_ALLOC);
574 #endif /* STYP_SDATA */
577 if (styp_flags & IMAGE_SCN_LNK_REMOVE)
578 sec_flags |= SEC_EXCLUDE;
580 if (styp_flags & IMAGE_SCN_LNK_COMDAT)
582 sec_flags |= SEC_LINK_ONCE;
584 /* Unfortunately, the PE format stores essential information in
585 the symbol table, of all places. We need to extract that
586 information now, so that objdump and the linker will know how
587 to handle the section without worrying about the symbols. We
588 can't call slurp_symtab, because the linker doesn't want the
591 if (_bfd_coff_get_external_symbols (abfd))
593 bfd_byte *esym, *esymend;
595 esym = (bfd_byte *) obj_coff_external_syms (abfd);
596 esymend = esym + obj_raw_syment_count (abfd) * SYMESZ;
598 while (esym < esymend)
600 struct internal_syment isym;
602 bfd_coff_swap_sym_in (abfd, (PTR) esym, (PTR) &isym);
604 if (sizeof (internal_s->s_name) > SYMNMLEN)
606 /* This case implies that the matching symbol name
607 will be in the string table. */
611 if (isym.n_sclass == C_STAT
612 && isym.n_type == T_NULL
613 && isym.n_numaux == 1)
615 char buf[SYMNMLEN + 1];
618 symname = _bfd_coff_internal_syment_name (abfd, &isym, buf);
622 if (strcmp (name, symname) == 0)
624 union internal_auxent aux;
626 /* This is the section symbol. */
628 bfd_coff_swap_aux_in (abfd, (PTR) (esym + SYMESZ),
629 isym.n_type, isym.n_sclass,
630 0, isym.n_numaux, (PTR) &aux);
632 switch (aux.x_scn.x_comdat)
634 case IMAGE_COMDAT_SELECT_NODUPLICATES:
635 sec_flags |= SEC_LINK_DUPLICATES_ONE_ONLY;
639 case IMAGE_COMDAT_SELECT_ANY:
640 sec_flags |= SEC_LINK_DUPLICATES_DISCARD;
643 case IMAGE_COMDAT_SELECT_SAME_SIZE:
644 sec_flags |= SEC_LINK_DUPLICATES_SAME_SIZE;
647 case IMAGE_COMDAT_SELECT_EXACT_MATCH:
648 sec_flags |= SEC_LINK_DUPLICATES_SAME_CONTENTS;
651 case IMAGE_COMDAT_SELECT_ASSOCIATIVE:
652 /* FIXME: This is not currently implemented. */
653 sec_flags |= SEC_LINK_DUPLICATES_DISCARD;
661 esym += (isym.n_numaux + 1) * SYMESZ;
670 #define get_index(symbol) ((symbol)->udata.i)
674 bfd_coff_backend_data
678 Special entry points for gdb to swap in coff symbol table parts:
681 . void (*_bfd_coff_swap_aux_in) PARAMS ((
690 . void (*_bfd_coff_swap_sym_in) PARAMS ((
695 . void (*_bfd_coff_swap_lineno_in) PARAMS ((
701 Special entry points for gas to swap out coff parts:
703 . unsigned int (*_bfd_coff_swap_aux_out) PARAMS ((
712 . unsigned int (*_bfd_coff_swap_sym_out) PARAMS ((
717 . unsigned int (*_bfd_coff_swap_lineno_out) PARAMS ((
722 . unsigned int (*_bfd_coff_swap_reloc_out) PARAMS ((
727 . unsigned int (*_bfd_coff_swap_filehdr_out) PARAMS ((
732 . unsigned int (*_bfd_coff_swap_aouthdr_out) PARAMS ((
737 . unsigned int (*_bfd_coff_swap_scnhdr_out) PARAMS ((
743 Special entry points for generic COFF routines to call target
744 dependent COFF routines:
746 . unsigned int _bfd_filhsz;
747 . unsigned int _bfd_aoutsz;
748 . unsigned int _bfd_scnhsz;
749 . unsigned int _bfd_symesz;
750 . unsigned int _bfd_auxesz;
751 . unsigned int _bfd_relsz;
752 . unsigned int _bfd_linesz;
753 . boolean _bfd_coff_long_filenames;
754 . boolean _bfd_coff_long_section_names;
755 . unsigned int _bfd_coff_default_section_alignment_power;
756 . void (*_bfd_coff_swap_filehdr_in) PARAMS ((
760 . void (*_bfd_coff_swap_aouthdr_in) PARAMS ((
764 . void (*_bfd_coff_swap_scnhdr_in) PARAMS ((
768 . void (*_bfd_coff_swap_reloc_in) PARAMS ((
772 . boolean (*_bfd_coff_bad_format_hook) PARAMS ((
774 . PTR internal_filehdr));
775 . boolean (*_bfd_coff_set_arch_mach_hook) PARAMS ((
777 . PTR internal_filehdr));
778 . PTR (*_bfd_coff_mkobject_hook) PARAMS ((
780 . PTR internal_filehdr,
781 . PTR internal_aouthdr));
782 . flagword (*_bfd_styp_to_sec_flags_hook) PARAMS ((
784 . PTR internal_scnhdr,
785 . const char *name));
786 . void (*_bfd_set_alignment_hook) PARAMS ((
789 . PTR internal_scnhdr));
790 . boolean (*_bfd_coff_slurp_symbol_table) PARAMS ((
792 . boolean (*_bfd_coff_symname_in_debug) PARAMS ((
794 . struct internal_syment *sym));
795 . boolean (*_bfd_coff_pointerize_aux_hook) PARAMS ((
797 . combined_entry_type *table_base,
798 . combined_entry_type *symbol,
799 . unsigned int indaux,
800 . combined_entry_type *aux));
801 . boolean (*_bfd_coff_print_aux) PARAMS ((
804 . combined_entry_type *table_base,
805 . combined_entry_type *symbol,
806 . combined_entry_type *aux,
807 . unsigned int indaux));
808 . void (*_bfd_coff_reloc16_extra_cases) PARAMS ((
810 . struct bfd_link_info *link_info,
811 . struct bfd_link_order *link_order,
814 . unsigned int *src_ptr,
815 . unsigned int *dst_ptr));
816 . int (*_bfd_coff_reloc16_estimate) PARAMS ((
818 . asection *input_section,
820 . unsigned int shrink,
821 . struct bfd_link_info *link_info));
822 . boolean (*_bfd_coff_sym_is_global) PARAMS ((
824 . struct internal_syment *));
825 . boolean (*_bfd_coff_compute_section_file_positions) PARAMS ((
827 . boolean (*_bfd_coff_start_final_link) PARAMS ((
829 . struct bfd_link_info *info));
830 . boolean (*_bfd_coff_relocate_section) PARAMS ((
832 . struct bfd_link_info *info,
834 . asection *input_section,
835 . bfd_byte *contents,
836 . struct internal_reloc *relocs,
837 . struct internal_syment *syms,
838 . asection **sections));
839 . reloc_howto_type *(*_bfd_coff_rtype_to_howto) PARAMS ((
842 . struct internal_reloc *rel,
843 . struct coff_link_hash_entry *h,
844 . struct internal_syment *sym,
845 . bfd_vma *addendp));
846 . boolean (*_bfd_coff_adjust_symndx) PARAMS ((
848 . struct bfd_link_info *info,
851 . struct internal_reloc *reloc,
852 . boolean *adjustedp));
853 . boolean (*_bfd_coff_link_add_one_symbol) PARAMS ((
854 . struct bfd_link_info *info,
860 . const char *string,
863 . struct bfd_link_hash_entry **hashp));
865 . boolean (*_bfd_coff_link_output_has_begun) PARAMS ((
867 . boolean (*_bfd_coff_final_link_postscript) PARAMS ((
869 . struct coff_final_link_info * pfinfo));
871 .} bfd_coff_backend_data;
873 .#define coff_backend_info(abfd) ((bfd_coff_backend_data *) (abfd)->xvec->backend_data)
875 .#define bfd_coff_swap_aux_in(a,e,t,c,ind,num,i) \
876 . ((coff_backend_info (a)->_bfd_coff_swap_aux_in) (a,e,t,c,ind,num,i))
878 .#define bfd_coff_swap_sym_in(a,e,i) \
879 . ((coff_backend_info (a)->_bfd_coff_swap_sym_in) (a,e,i))
881 .#define bfd_coff_swap_lineno_in(a,e,i) \
882 . ((coff_backend_info ( a)->_bfd_coff_swap_lineno_in) (a,e,i))
884 .#define bfd_coff_swap_reloc_out(abfd, i, o) \
885 . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_out) (abfd, i, o))
887 .#define bfd_coff_swap_lineno_out(abfd, i, o) \
888 . ((coff_backend_info (abfd)->_bfd_coff_swap_lineno_out) (abfd, i, o))
890 .#define bfd_coff_swap_aux_out(a,i,t,c,ind,num,o) \
891 . ((coff_backend_info (a)->_bfd_coff_swap_aux_out) (a,i,t,c,ind,num,o))
893 .#define bfd_coff_swap_sym_out(abfd, i,o) \
894 . ((coff_backend_info (abfd)->_bfd_coff_swap_sym_out) (abfd, i, o))
896 .#define bfd_coff_swap_scnhdr_out(abfd, i,o) \
897 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_out) (abfd, i, o))
899 .#define bfd_coff_swap_filehdr_out(abfd, i,o) \
900 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_out) (abfd, i, o))
902 .#define bfd_coff_swap_aouthdr_out(abfd, i,o) \
903 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_out) (abfd, i, o))
905 .#define bfd_coff_filhsz(abfd) (coff_backend_info (abfd)->_bfd_filhsz)
906 .#define bfd_coff_aoutsz(abfd) (coff_backend_info (abfd)->_bfd_aoutsz)
907 .#define bfd_coff_scnhsz(abfd) (coff_backend_info (abfd)->_bfd_scnhsz)
908 .#define bfd_coff_symesz(abfd) (coff_backend_info (abfd)->_bfd_symesz)
909 .#define bfd_coff_auxesz(abfd) (coff_backend_info (abfd)->_bfd_auxesz)
910 .#define bfd_coff_relsz(abfd) (coff_backend_info (abfd)->_bfd_relsz)
911 .#define bfd_coff_linesz(abfd) (coff_backend_info (abfd)->_bfd_linesz)
912 .#define bfd_coff_long_filenames(abfd) (coff_backend_info (abfd)->_bfd_coff_long_filenames)
913 .#define bfd_coff_long_section_names(abfd) \
914 . (coff_backend_info (abfd)->_bfd_coff_long_section_names)
915 .#define bfd_coff_default_section_alignment_power(abfd) \
916 . (coff_backend_info (abfd)->_bfd_coff_default_section_alignment_power)
917 .#define bfd_coff_swap_filehdr_in(abfd, i,o) \
918 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_in) (abfd, i, o))
920 .#define bfd_coff_swap_aouthdr_in(abfd, i,o) \
921 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_in) (abfd, i, o))
923 .#define bfd_coff_swap_scnhdr_in(abfd, i,o) \
924 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_in) (abfd, i, o))
926 .#define bfd_coff_swap_reloc_in(abfd, i, o) \
927 . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_in) (abfd, i, o))
929 .#define bfd_coff_bad_format_hook(abfd, filehdr) \
930 . ((coff_backend_info (abfd)->_bfd_coff_bad_format_hook) (abfd, filehdr))
932 .#define bfd_coff_set_arch_mach_hook(abfd, filehdr)\
933 . ((coff_backend_info (abfd)->_bfd_coff_set_arch_mach_hook) (abfd, filehdr))
934 .#define bfd_coff_mkobject_hook(abfd, filehdr, aouthdr)\
935 . ((coff_backend_info (abfd)->_bfd_coff_mkobject_hook) (abfd, filehdr, aouthdr))
937 .#define bfd_coff_styp_to_sec_flags_hook(abfd, scnhdr, name)\
938 . ((coff_backend_info (abfd)->_bfd_styp_to_sec_flags_hook) (abfd, scnhdr, name))
940 .#define bfd_coff_set_alignment_hook(abfd, sec, scnhdr)\
941 . ((coff_backend_info (abfd)->_bfd_set_alignment_hook) (abfd, sec, scnhdr))
943 .#define bfd_coff_slurp_symbol_table(abfd)\
944 . ((coff_backend_info (abfd)->_bfd_coff_slurp_symbol_table) (abfd))
946 .#define bfd_coff_symname_in_debug(abfd, sym)\
947 . ((coff_backend_info (abfd)->_bfd_coff_symname_in_debug) (abfd, sym))
949 .#define bfd_coff_print_aux(abfd, file, base, symbol, aux, indaux)\
950 . ((coff_backend_info (abfd)->_bfd_coff_print_aux)\
951 . (abfd, file, base, symbol, aux, indaux))
953 .#define bfd_coff_reloc16_extra_cases(abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr)\
954 . ((coff_backend_info (abfd)->_bfd_coff_reloc16_extra_cases)\
955 . (abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr))
957 .#define bfd_coff_reloc16_estimate(abfd, section, reloc, shrink, link_info)\
958 . ((coff_backend_info (abfd)->_bfd_coff_reloc16_estimate)\
959 . (abfd, section, reloc, shrink, link_info))
961 .#define bfd_coff_sym_is_global(abfd, sym)\
962 . ((coff_backend_info (abfd)->_bfd_coff_sym_is_global)\
965 .#define bfd_coff_compute_section_file_positions(abfd)\
966 . ((coff_backend_info (abfd)->_bfd_coff_compute_section_file_positions)\
969 .#define bfd_coff_start_final_link(obfd, info)\
970 . ((coff_backend_info (obfd)->_bfd_coff_start_final_link)\
972 .#define bfd_coff_relocate_section(obfd,info,ibfd,o,con,rel,isyms,secs)\
973 . ((coff_backend_info (ibfd)->_bfd_coff_relocate_section)\
974 . (obfd, info, ibfd, o, con, rel, isyms, secs))
975 .#define bfd_coff_rtype_to_howto(abfd, sec, rel, h, sym, addendp)\
976 . ((coff_backend_info (abfd)->_bfd_coff_rtype_to_howto)\
977 . (abfd, sec, rel, h, sym, addendp))
978 .#define bfd_coff_adjust_symndx(obfd, info, ibfd, sec, rel, adjustedp)\
979 . ((coff_backend_info (abfd)->_bfd_coff_adjust_symndx)\
980 . (obfd, info, ibfd, sec, rel, adjustedp))
981 .#define bfd_coff_link_add_one_symbol(info,abfd,name,flags,section,value,string,cp,coll,hashp)\
982 . ((coff_backend_info (abfd)->_bfd_coff_link_add_one_symbol)\
983 . (info, abfd, name, flags, section, value, string, cp, coll, hashp))
985 .#define bfd_coff_link_output_has_begun(a) \
986 . ((coff_backend_info (a)->_bfd_coff_link_output_has_begun) (a))
987 .#define bfd_coff_final_link_postscript(a,p) \
988 . ((coff_backend_info (a)->_bfd_coff_final_link_postscript) (a,p))
992 /* See whether the magic number matches. */
995 coff_bad_format_hook (abfd, filehdr)
999 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
1001 if (BADMAG (*internal_f))
1004 /* if the optional header is NULL or not the correct size then
1005 quit; the only difference I can see between m88k dgux headers (MC88DMAGIC)
1006 and Intel 960 readwrite headers (I960WRMAGIC) is that the
1007 optional header is of a different size.
1009 But the mips keeps extra stuff in it's opthdr, so dont check
1013 #if defined(M88) || defined(I960)
1014 if (internal_f->f_opthdr != 0 && AOUTSZ != internal_f->f_opthdr)
1022 initialize a section structure with information peculiar to this
1023 particular implementation of coff
1027 coff_new_section_hook (abfd, section)
1031 combined_entry_type *native;
1033 section->alignment_power = COFF_DEFAULT_SECTION_ALIGNMENT_POWER;
1036 if (xcoff_data (abfd)->text_align_power != 0
1037 && strcmp (bfd_get_section_name (abfd, section), ".text") == 0)
1038 section->alignment_power = xcoff_data (abfd)->text_align_power;
1039 if (xcoff_data (abfd)->data_align_power != 0
1040 && strcmp (bfd_get_section_name (abfd, section), ".data") == 0)
1041 section->alignment_power = xcoff_data (abfd)->data_align_power;
1044 /* Allocate aux records for section symbols, to store size and
1047 @@ The 10 is a guess at a plausible maximum number of aux entries
1048 (but shouldn't be a constant). */
1049 native = ((combined_entry_type *)
1050 bfd_zalloc (abfd, sizeof (combined_entry_type) * 10));
1054 /* We don't need to set up n_name, n_value, or n_scnum in the native
1055 symbol information, since they'll be overriden by the BFD symbol
1056 anyhow. However, we do need to set the type and storage class,
1057 in case this symbol winds up getting written out. The value 0
1058 for n_numaux is already correct. */
1060 native->u.syment.n_type = T_NULL;
1061 native->u.syment.n_sclass = C_STAT;
1063 coffsymbol (section->symbol)->native = native;
1065 /* The .stab section must be aligned to 2**2 at most, because
1066 otherwise there may be gaps in the section which gdb will not
1067 know how to interpret. Examining the section name is a hack, but
1068 that is also how gdb locates the section.
1069 We need to handle the .ctors and .dtors sections similarly, to
1070 avoid introducing null words in the tables. */
1071 if (COFF_DEFAULT_SECTION_ALIGNMENT_POWER > 2
1072 && (strncmp (section->name, ".stab", 5) == 0
1073 || strcmp (section->name, ".ctors") == 0
1074 || strcmp (section->name, ".dtors") == 0))
1075 section->alignment_power = 2;
1077 /* Similarly, the .stabstr section must be aligned to 2**0 at most. */
1078 if (COFF_DEFAULT_SECTION_ALIGNMENT_POWER > 0
1079 && strncmp (section->name, ".stabstr", 8) == 0)
1080 section->alignment_power = 0;
1085 #ifdef COFF_ALIGN_IN_SECTION_HEADER
1087 /* Set the alignment of a BFD section. */
1089 static void coff_set_alignment_hook PARAMS ((bfd *, asection *, PTR));
1092 coff_set_alignment_hook (abfd, section, scnhdr)
1097 struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr;
1101 /* Extract ALIGN from 2**ALIGN stored in section header */
1102 for (i = 0; i < 32; i++)
1103 if ((1 << i) >= hdr->s_align)
1106 section->alignment_power = i;
1109 #else /* ! COFF_ALIGN_IN_SECTION_HEADER */
1112 /* a couple of macros to help setting the alignment power field */
1113 #define ALIGN_SET(field,x,y) \
1114 if (((field) & IMAGE_SCN_ALIGN_64BYTES) == x )\
1116 section->alignment_power = y;\
1119 #define ELIFALIGN_SET(field,x,y) \
1120 else if (( (field) & IMAGE_SCN_ALIGN_64BYTES) == x ) \
1122 section->alignment_power = y;\
1125 static void coff_set_alignment_hook PARAMS ((bfd *, asection *, PTR));
1128 coff_set_alignment_hook (abfd, section, scnhdr)
1133 struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr;
1135 ALIGN_SET (hdr->s_flags, IMAGE_SCN_ALIGN_64BYTES, 6)
1136 ELIFALIGN_SET (hdr->s_flags, IMAGE_SCN_ALIGN_32BYTES, 5)
1137 ELIFALIGN_SET (hdr->s_flags, IMAGE_SCN_ALIGN_16BYTES, 4)
1138 ELIFALIGN_SET (hdr->s_flags, IMAGE_SCN_ALIGN_8BYTES, 3)
1139 ELIFALIGN_SET (hdr->s_flags, IMAGE_SCN_ALIGN_4BYTES, 2)
1140 ELIFALIGN_SET (hdr->s_flags, IMAGE_SCN_ALIGN_2BYTES, 1)
1141 ELIFALIGN_SET (hdr->s_flags, IMAGE_SCN_ALIGN_1BYTES, 0)
1143 #ifdef POWERPC_LE_PE
1144 if (strcmp (section->name, ".idata$2") == 0)
1146 section->alignment_power = 0;
1148 else if (strcmp (section->name, ".idata$3") == 0)
1150 section->alignment_power = 0;
1152 else if (strcmp (section->name, ".idata$4") == 0)
1154 section->alignment_power = 2;
1156 else if (strcmp (section->name, ".idata$5") == 0)
1158 section->alignment_power = 2;
1160 else if (strcmp (section->name, ".idata$6") == 0)
1162 section->alignment_power = 1;
1164 else if (strcmp (section->name, ".reloc") == 0)
1166 section->alignment_power = 1;
1168 else if (strncmp (section->name, ".stab", 5) == 0)
1170 section->alignment_power = 2;
1174 #ifdef COFF_IMAGE_WITH_PE
1175 /* In a PE image file, the s_paddr field holds the virtual size of a
1176 section, while the s_size field holds the raw size. */
1177 if (hdr->s_paddr != 0)
1179 if (coff_section_data (abfd, section) == NULL)
1181 section->used_by_bfd =
1182 (PTR) bfd_zalloc (abfd, sizeof (struct coff_section_tdata));
1183 if (section->used_by_bfd == NULL)
1185 /* FIXME: Return error. */
1189 if (pei_section_data (abfd, section) == NULL)
1191 coff_section_data (abfd, section)->tdata =
1192 (PTR) bfd_zalloc (abfd, sizeof (struct pei_section_tdata));
1193 if (coff_section_data (abfd, section)->tdata == NULL)
1195 /* FIXME: Return error. */
1199 pei_section_data (abfd, section)->virt_size = hdr->s_paddr;
1205 #undef ELIFALIGN_SET
1207 #else /* ! COFF_WITH_PE */
1210 /* We grossly abuse this function to handle XCOFF overflow headers.
1211 When we see one, we correct the reloc and line number counts in the
1212 real header, and remove the section we just created. */
1214 static void coff_set_alignment_hook PARAMS ((bfd *, asection *, PTR));
1217 coff_set_alignment_hook (abfd, section, scnhdr)
1222 struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr;
1226 if ((hdr->s_flags & STYP_OVRFLO) == 0)
1229 real_sec = coff_section_from_bfd_index (abfd, hdr->s_nreloc);
1230 if (real_sec == NULL)
1233 real_sec->reloc_count = hdr->s_paddr;
1234 real_sec->lineno_count = hdr->s_vaddr;
1236 for (ps = &abfd->sections; *ps != NULL; ps = &(*ps)->next)
1241 --abfd->section_count;
1247 #else /* ! RS6000COFF_C */
1249 #define coff_set_alignment_hook \
1250 ((void (*) PARAMS ((bfd *, asection *, PTR))) bfd_void)
1252 #endif /* ! RS6000COFF_C */
1253 #endif /* ! COFF_WITH_PE */
1254 #endif /* ! COFF_ALIGN_IN_SECTION_HEADER */
1256 #ifndef coff_mkobject
1258 static boolean coff_mkobject PARAMS ((bfd *));
1261 coff_mkobject (abfd)
1264 coff_data_type *coff;
1266 abfd->tdata.coff_obj_data = (struct coff_tdata *) bfd_zalloc (abfd, sizeof (coff_data_type));
1267 if (abfd->tdata.coff_obj_data == 0)
1269 coff = coff_data (abfd);
1270 coff->symbols = (coff_symbol_type *) NULL;
1271 coff->conversion_table = (unsigned int *) NULL;
1272 coff->raw_syments = (struct coff_ptr_struct *) NULL;
1273 coff->relocbase = 0;
1274 coff->local_toc_sym_map = 0;
1276 /* make_abs_section(abfd);*/
1282 /* Create the COFF backend specific information. */
1283 #ifndef coff_mkobject_hook
1285 coff_mkobject_hook (abfd, filehdr, aouthdr)
1290 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
1291 coff_data_type *coff;
1293 if (coff_mkobject (abfd) == false)
1296 coff = coff_data (abfd);
1298 coff->sym_filepos = internal_f->f_symptr;
1300 /* These members communicate important constants about the symbol
1301 table to GDB's symbol-reading code. These `constants'
1302 unfortunately vary among coff implementations... */
1303 coff->local_n_btmask = N_BTMASK;
1304 coff->local_n_btshft = N_BTSHFT;
1305 coff->local_n_tmask = N_TMASK;
1306 coff->local_n_tshift = N_TSHIFT;
1307 coff->local_symesz = SYMESZ;
1308 coff->local_auxesz = AUXESZ;
1309 coff->local_linesz = LINESZ;
1311 obj_raw_syment_count (abfd) =
1312 obj_conv_table_size (abfd) =
1313 internal_f->f_nsyms;
1316 if ((internal_f->f_flags & F_SHROBJ) != 0)
1317 abfd->flags |= DYNAMIC;
1318 if (aouthdr != NULL && internal_f->f_opthdr >= AOUTSZ)
1320 struct internal_aouthdr *internal_a =
1321 (struct internal_aouthdr *) aouthdr;
1322 struct xcoff_tdata *xcoff;
1324 xcoff = xcoff_data (abfd);
1325 xcoff->full_aouthdr = true;
1326 xcoff->toc = internal_a->o_toc;
1327 xcoff->sntoc = internal_a->o_sntoc;
1328 xcoff->snentry = internal_a->o_snentry;
1329 xcoff->text_align_power = internal_a->o_algntext;
1330 xcoff->data_align_power = internal_a->o_algndata;
1331 xcoff->modtype = internal_a->o_modtype;
1332 xcoff->cputype = internal_a->o_cputype;
1333 xcoff->maxdata = internal_a->o_maxdata;
1334 xcoff->maxstack = internal_a->o_maxstack;
1339 /* Set the flags field from the COFF header read in */
1340 if (! coff_arm_bfd_set_private_flags (abfd, internal_f->f_flags))
1348 /* Determine the machine architecture and type. FIXME: This is target
1349 dependent because the magic numbers are defined in the target
1350 dependent header files. But there is no particular need for this.
1351 If the magic numbers were moved to a separate file, this function
1352 would be target independent and would also be much more successful
1353 at linking together COFF files for different architectures. */
1356 coff_set_arch_mach_hook (abfd, filehdr)
1361 enum bfd_architecture arch;
1362 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
1365 switch (internal_f->f_magic)
1369 arch = bfd_arch_powerpc;
1370 machine = 0; /* what does this mean? (krk) */
1376 case I386AIXMAGIC: /* Danbury PS/2 AIX C Compiler */
1377 case LYNXCOFFMAGIC: /* shadows the m68k Lynx number below, sigh */
1378 arch = bfd_arch_i386;
1382 #ifdef A29K_MAGIC_BIG
1383 case A29K_MAGIC_BIG:
1384 case A29K_MAGIC_LITTLE:
1385 arch = bfd_arch_a29k;
1391 arch = bfd_arch_arm;
1392 switch (internal_f->f_flags & F_ARM_ARCHITECTURE_MASK)
1394 case F_ARM_2: machine = bfd_mach_arm_2; break;
1395 case F_ARM_2a: machine = bfd_mach_arm_2a; break;
1396 case F_ARM_3: machine = bfd_mach_arm_3; break;
1398 case F_ARM_3M: machine = bfd_mach_arm_3M; break;
1399 case F_ARM_4: machine = bfd_mach_arm_4; break;
1400 case F_ARM_4T: machine = bfd_mach_arm_4T; break;
1407 #ifdef MC68KBCSMAGIC
1410 #ifdef APOLLOM68KMAGIC
1411 case APOLLOM68KMAGIC:
1413 #ifdef LYNXCOFFMAGIC
1416 arch = bfd_arch_m68k;
1417 machine = bfd_mach_m68020;
1424 arch = bfd_arch_m88k;
1430 arch = bfd_arch_z8k;
1431 switch (internal_f->f_flags & F_MACHMASK)
1434 machine = bfd_mach_z8001;
1437 machine = bfd_mach_z8002;
1446 arch = bfd_arch_i860;
1453 arch = bfd_arch_i960;
1454 switch (F_I960TYPE & internal_f->f_flags)
1458 machine = bfd_mach_i960_core;
1461 machine = bfd_mach_i960_kb_sb;
1464 machine = bfd_mach_i960_mc;
1467 machine = bfd_mach_i960_xa;
1470 machine = bfd_mach_i960_ca;
1473 machine = bfd_mach_i960_ka_sa;
1476 machine = bfd_mach_i960_jx;
1479 machine = bfd_mach_i960_hx;
1493 if (xcoff_data (abfd)->cputype != -1)
1494 cputype = xcoff_data (abfd)->cputype & 0xff;
1497 /* We did not get a value from the a.out header. If the
1498 file has not been stripped, we may be able to get the
1499 architecture information from the first symbol, if it
1500 is a .file symbol. */
1501 if (obj_raw_syment_count (abfd) == 0)
1505 bfd_byte buf[SYMESZ];
1506 struct internal_syment sym;
1508 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0
1509 || bfd_read (buf, 1, SYMESZ, abfd) != SYMESZ)
1511 coff_swap_sym_in (abfd, (PTR) buf, (PTR) &sym);
1512 if (sym.n_sclass == C_FILE)
1513 cputype = sym.n_type & 0xff;
1519 /* FIXME: We don't handle all cases here. */
1525 /* PowerPC Macs use the same magic numbers as RS/6000
1526 (because that's how they were bootstrapped originally),
1527 but they are always PowerPC architecture. */
1528 arch = bfd_arch_powerpc;
1531 arch = bfd_arch_rs6000;
1533 #endif /* POWERMAC */
1537 arch = bfd_arch_powerpc;
1540 case 2: /* 64 bit PowerPC */
1541 arch = bfd_arch_powerpc;
1545 arch = bfd_arch_powerpc;
1549 arch = bfd_arch_rs6000;
1559 arch = bfd_arch_we32k;
1566 arch = bfd_arch_h8300;
1567 machine = bfd_mach_h8300;
1568 /* !! FIXME this probably isn't the right place for this */
1569 abfd->flags |= BFD_IS_RELAXABLE;
1575 arch = bfd_arch_h8300;
1576 machine = bfd_mach_h8300h;
1577 /* !! FIXME this probably isn't the right place for this */
1578 abfd->flags |= BFD_IS_RELAXABLE;
1584 arch = bfd_arch_h8300;
1585 machine = bfd_mach_h8300s;
1586 /* !! FIXME this probably isn't the right place for this */
1587 abfd->flags |= BFD_IS_RELAXABLE;
1591 #ifdef SH_ARCH_MAGIC_BIG
1592 case SH_ARCH_MAGIC_BIG:
1593 case SH_ARCH_MAGIC_LITTLE:
1601 arch = bfd_arch_h8500;
1608 #ifdef LYNXCOFFMAGIC
1611 arch = bfd_arch_sparc;
1618 arch = bfd_arch_tic30;
1623 default: /* Unreadable input file type */
1624 arch = bfd_arch_obscure;
1628 bfd_default_set_arch_mach (abfd, arch, machine);
1632 #ifdef SYMNAME_IN_DEBUG
1634 static boolean symname_in_debug_hook
1635 PARAMS ((bfd *, struct internal_syment *));
1638 symname_in_debug_hook (abfd, sym)
1640 struct internal_syment *sym;
1642 return SYMNAME_IN_DEBUG (sym) ? true : false;
1647 #define symname_in_debug_hook \
1648 (boolean (*) PARAMS ((bfd *, struct internal_syment *))) bfd_false
1654 /* Handle the csect auxent of a C_EXT or C_HIDEXT symbol. */
1656 static boolean coff_pointerize_aux_hook
1657 PARAMS ((bfd *, combined_entry_type *, combined_entry_type *,
1658 unsigned int, combined_entry_type *));
1662 coff_pointerize_aux_hook (abfd, table_base, symbol, indaux, aux)
1664 combined_entry_type *table_base;
1665 combined_entry_type *symbol;
1666 unsigned int indaux;
1667 combined_entry_type *aux;
1669 int class = symbol->u.syment.n_sclass;
1671 if ((class == C_EXT || class == C_HIDEXT)
1672 && indaux + 1 == symbol->u.syment.n_numaux)
1674 if (SMTYP_SMTYP (aux->u.auxent.x_csect.x_smtyp) == XTY_LD)
1676 aux->u.auxent.x_csect.x_scnlen.p =
1677 table_base + aux->u.auxent.x_csect.x_scnlen.l;
1678 aux->fix_scnlen = 1;
1681 /* Return true to indicate that the caller should not do any
1682 further work on this auxent. */
1686 /* Return false to indicate that this auxent should be handled by
1694 /* We don't want to pointerize bal entries. */
1696 static boolean coff_pointerize_aux_hook
1697 PARAMS ((bfd *, combined_entry_type *, combined_entry_type *,
1698 unsigned int, combined_entry_type *));
1702 coff_pointerize_aux_hook (abfd, table_base, symbol, indaux, aux)
1704 combined_entry_type *table_base;
1705 combined_entry_type *symbol;
1706 unsigned int indaux;
1707 combined_entry_type *aux;
1709 /* Return true if we don't want to pointerize this aux entry, which
1710 is the case for the lastfirst aux entry for a C_LEAFPROC symbol. */
1712 && (symbol->u.syment.n_sclass == C_LEAFPROC
1713 || symbol->u.syment.n_sclass == C_LEAFSTAT
1714 || symbol->u.syment.n_sclass == C_LEAFEXT));
1719 #define coff_pointerize_aux_hook 0
1722 #endif /* ! RS6000COFF_C */
1724 /* Print an aux entry. This returns true if it has printed it. */
1726 static boolean coff_print_aux
1727 PARAMS ((bfd *, FILE *, combined_entry_type *, combined_entry_type *,
1728 combined_entry_type *, unsigned int));
1731 coff_print_aux (abfd, file, table_base, symbol, aux, indaux)
1734 combined_entry_type *table_base;
1735 combined_entry_type *symbol;
1736 combined_entry_type *aux;
1737 unsigned int indaux;
1740 if ((symbol->u.syment.n_sclass == C_EXT
1741 || symbol->u.syment.n_sclass == C_HIDEXT)
1742 && indaux + 1 == symbol->u.syment.n_numaux)
1744 /* This is a csect entry. */
1745 fprintf (file, "AUX ");
1746 if (SMTYP_SMTYP (aux->u.auxent.x_csect.x_smtyp) != XTY_LD)
1748 BFD_ASSERT (! aux->fix_scnlen);
1749 fprintf (file, "val %5ld", aux->u.auxent.x_csect.x_scnlen.l);
1753 fprintf (file, "indx ");
1754 if (! aux->fix_scnlen)
1755 fprintf (file, "%4ld", aux->u.auxent.x_csect.x_scnlen.l);
1757 fprintf (file, "%4ld",
1758 (long) (aux->u.auxent.x_csect.x_scnlen.p - table_base));
1761 " prmhsh %ld snhsh %u typ %d algn %d clss %u stb %ld snstb %u",
1762 aux->u.auxent.x_csect.x_parmhash,
1763 (unsigned int) aux->u.auxent.x_csect.x_snhash,
1764 SMTYP_SMTYP (aux->u.auxent.x_csect.x_smtyp),
1765 SMTYP_ALIGN (aux->u.auxent.x_csect.x_smtyp),
1766 (unsigned int) aux->u.auxent.x_csect.x_smclas,
1767 aux->u.auxent.x_csect.x_stab,
1768 (unsigned int) aux->u.auxent.x_csect.x_snstab);
1773 /* Return false to indicate that no special action was taken. */
1781 To write relocations, the back end steps though the
1782 canonical relocation table and create an
1783 @code{internal_reloc}. The symbol index to use is removed from
1784 the @code{offset} field in the symbol table supplied. The
1785 address comes directly from the sum of the section base
1786 address and the relocation offset; the type is dug directly
1787 from the howto field. Then the @code{internal_reloc} is
1788 swapped into the shape of an @code{external_reloc} and written
1795 static int compare_arelent_ptr PARAMS ((const PTR, const PTR));
1797 /* AUX's ld wants relocations to be sorted */
1799 compare_arelent_ptr (x, y)
1803 const arelent **a = (const arelent **) x;
1804 const arelent **b = (const arelent **) y;
1805 bfd_size_type aadr = (*a)->address;
1806 bfd_size_type badr = (*b)->address;
1808 return (aadr < badr ? -1 : badr < aadr ? 1 : 0);
1811 #endif /* TARG_AUX */
1814 coff_write_relocs (abfd, first_undef)
1820 for (s = abfd->sections; s != (asection *) NULL; s = s->next)
1823 struct external_reloc dst;
1829 /* sort relocations before we write them out */
1830 p = (arelent **) bfd_malloc (s->reloc_count * sizeof (arelent *));
1831 if (p == NULL && s->reloc_count > 0)
1833 memcpy (p, s->orelocation, s->reloc_count * sizeof (arelent *));
1834 qsort (p, s->reloc_count, sizeof (arelent *), compare_arelent_ptr);
1837 if (bfd_seek (abfd, s->rel_filepos, SEEK_SET) != 0)
1839 for (i = 0; i < s->reloc_count; i++)
1841 struct internal_reloc n;
1843 memset ((PTR) & n, 0, sizeof (n));
1845 /* Now we've renumbered the symbols we know where the
1846 undefined symbols live in the table. Check the reloc
1847 entries for symbols who's output bfd isn't the right one.
1848 This is because the symbol was undefined (which means
1849 that all the pointers are never made to point to the same
1850 place). This is a bad thing,'cause the symbols attached
1851 to the output bfd are indexed, so that the relocation
1852 entries know which symbol index they point to. So we
1853 have to look up the output symbol here. */
1855 if (q->sym_ptr_ptr[0]->the_bfd != abfd)
1858 const char *sname = q->sym_ptr_ptr[0]->name;
1859 asymbol **outsyms = abfd->outsymbols;
1860 for (i = first_undef; outsyms[i]; i++)
1862 const char *intable = outsyms[i]->name;
1863 if (strcmp (intable, sname) == 0) {
1864 /* got a hit, so repoint the reloc */
1865 q->sym_ptr_ptr = outsyms + i;
1871 n.r_vaddr = q->address + s->vma;
1874 /* The 29k const/consth reloc pair is a real kludge. The consth
1875 part doesn't have a symbol; it has an offset. So rebuilt
1877 if (q->howto->type == R_IHCONST)
1878 n.r_symndx = q->addend;
1883 if (q->sym_ptr_ptr == bfd_abs_section_ptr->symbol_ptr_ptr)
1884 /* This is a relocation relative to the absolute symbol. */
1888 n.r_symndx = get_index ((*(q->sym_ptr_ptr)));
1889 /* Take notice if the symbol reloc points to a symbol
1890 we don't have in our symbol table. What should we
1892 if (n.r_symndx > obj_conv_table_size (abfd))
1897 #ifdef SWAP_OUT_RELOC_OFFSET
1898 n.r_offset = q->addend;
1902 /* Work out reloc type from what is required */
1903 SELECT_RELOC (n, q->howto);
1905 n.r_type = q->howto->type;
1907 coff_swap_reloc_out (abfd, &n, &dst);
1908 if (bfd_write ((PTR) & dst, 1, RELSZ, abfd) != RELSZ)
1921 /* Set flags and magic number of a coff file from architecture and machine
1922 type. Result is true if we can represent the arch&type, false if not. */
1925 coff_set_flags (abfd, magicp, flagsp)
1927 unsigned int *magicp;
1928 unsigned short *flagsp;
1930 switch (bfd_get_arch (abfd))
1935 switch (bfd_get_mach (abfd))
1937 case bfd_mach_z8001:
1940 case bfd_mach_z8002:
1954 *magicp = I960ROMAGIC;
1956 ((bfd_get_file_flags(abfd) & WP_TEXT) ? I960ROMAGIC :
1957 I960RWMAGIC); FIXME???
1959 switch (bfd_get_mach (abfd))
1961 case bfd_mach_i960_core:
1964 case bfd_mach_i960_kb_sb:
1967 case bfd_mach_i960_mc:
1970 case bfd_mach_i960_xa:
1973 case bfd_mach_i960_ca:
1976 case bfd_mach_i960_ka_sa:
1979 case bfd_mach_i960_jx:
1982 case bfd_mach_i960_hx:
1995 case bfd_arch_tic30:
1996 *magicp = TIC30MAGIC;
2001 * magicp = ARMMAGIC;
2003 if (APCS_SET (abfd))
2005 if (APCS_26_FLAG (abfd))
2006 * flagsp |= F_APCS26;
2008 if (APCS_FLOAT_FLAG (abfd))
2009 * flagsp |= F_APCS_FLOAT;
2011 if (PIC_FLAG (abfd))
2014 if (INTERWORK_SET (abfd) && INTERWORK_FLAG (abfd))
2015 * flagsp |= F_INTERWORK;
2016 switch (bfd_get_mach (abfd))
2018 case bfd_mach_arm_2: * flagsp |= F_ARM_2; break;
2019 case bfd_mach_arm_2a: * flagsp |= F_ARM_2a; break;
2020 case bfd_mach_arm_3: * flagsp |= F_ARM_3; break;
2021 case bfd_mach_arm_3M: * flagsp |= F_ARM_3M; break;
2022 case bfd_mach_arm_4: * flagsp |= F_ARM_4; break;
2023 case bfd_mach_arm_4T: * flagsp |= F_ARM_4T; break;
2028 case bfd_arch_powerpc:
2035 *magicp = I386MAGIC;
2037 /* Just overwrite the usual value if we're doing Lynx. */
2038 *magicp = LYNXCOFFMAGIC;
2045 *magicp = I860MAGIC;
2051 #ifdef APOLLOM68KMAGIC
2052 *magicp = APOLLO_COFF_VERSION_NUMBER;
2054 /* NAMES_HAVE_UNDERSCORE may be defined by coff-u68k.c. */
2055 #ifdef NAMES_HAVE_UNDERSCORE
2056 *magicp = MC68KBCSMAGIC;
2058 *magicp = MC68MAGIC;
2062 /* Just overwrite the usual value if we're doing Lynx. */
2063 *magicp = LYNXCOFFMAGIC;
2071 *magicp = MC88OMAGIC;
2076 case bfd_arch_h8300:
2077 switch (bfd_get_mach (abfd))
2079 case bfd_mach_h8300:
2080 *magicp = H8300MAGIC;
2082 case bfd_mach_h8300h:
2083 *magicp = H8300HMAGIC;
2085 case bfd_mach_h8300s:
2086 *magicp = H8300SMAGIC;
2092 #ifdef SH_ARCH_MAGIC_BIG
2094 if (bfd_big_endian (abfd))
2095 *magicp = SH_ARCH_MAGIC_BIG;
2097 *magicp = SH_ARCH_MAGIC_LITTLE;
2103 case bfd_arch_sparc:
2104 *magicp = SPARCMAGIC;
2106 /* Just overwrite the usual value if we're doing Lynx. */
2107 *magicp = LYNXCOFFMAGIC;
2114 case bfd_arch_h8500:
2115 *magicp = H8500MAGIC;
2119 #ifdef A29K_MAGIC_BIG
2121 if (bfd_big_endian (abfd))
2122 *magicp = A29K_MAGIC_BIG;
2124 *magicp = A29K_MAGIC_LITTLE;
2130 case bfd_arch_we32k:
2131 *magicp = WE32KMAGIC;
2137 case bfd_arch_rs6000:
2139 case bfd_arch_powerpc:
2141 *magicp = U802TOCMAGIC;
2146 default: /* Unknown architecture */
2147 /* return false; -- fall through to "return false" below, to avoid
2148 "statement never reached" errors on the one below. */
2157 coff_set_arch_mach (abfd, arch, machine)
2159 enum bfd_architecture arch;
2160 unsigned long machine;
2163 unsigned short dummy2;
2165 if (! bfd_default_set_arch_mach (abfd, arch, machine))
2168 if (arch != bfd_arch_unknown &&
2169 coff_set_flags (abfd, &dummy1, &dummy2) != true)
2170 return false; /* We can't represent this type */
2172 return true; /* We're easy ... */
2176 /* Calculate the file position for each section. */
2179 #define ALIGN_SECTIONS_IN_FILE
2183 coff_compute_section_file_positions (abfd)
2187 asection *previous = (asection *) NULL;
2188 file_ptr sofar = FILHSZ;
2189 boolean align_adjust;
2191 #ifdef ALIGN_SECTIONS_IN_FILE
2196 /* On XCOFF, if we have symbols, set up the .debug section. */
2197 if (bfd_get_symcount (abfd) > 0)
2200 bfd_size_type i, symcount;
2204 symcount = bfd_get_symcount (abfd);
2205 for (symp = abfd->outsymbols, i = 0; i < symcount; symp++, i++)
2207 coff_symbol_type *cf;
2209 cf = coff_symbol_from (abfd, *symp);
2211 && cf->native != NULL
2212 && SYMNAME_IN_DEBUG (&cf->native->u.syment))
2216 len = strlen (bfd_asymbol_name (*symp));
2225 dsec = bfd_make_section_old_way (abfd, ".debug");
2228 dsec->_raw_size = sz;
2229 dsec->flags |= SEC_HAS_CONTENTS;
2234 #ifdef COFF_IMAGE_WITH_PE
2236 if (coff_data (abfd)->link_info)
2238 page_size = pe_data (abfd)->pe_opthdr.FileAlignment;
2241 page_size = PE_DEF_FILE_ALIGNMENT;
2243 #ifdef COFF_PAGE_SIZE
2244 int page_size = COFF_PAGE_SIZE;
2248 if (bfd_get_start_address (abfd))
2250 /* A start address may have been added to the original file. In this
2251 case it will need an optional header to record it. */
2252 abfd->flags |= EXEC_P;
2255 if (abfd->flags & EXEC_P)
2258 else if (xcoff_data (abfd)->full_aouthdr)
2261 sofar += SMALL_AOUTSZ;
2264 sofar += abfd->section_count * SCNHSZ;
2267 /* XCOFF handles overflows in the reloc and line number count fields
2268 by allocating a new section header to hold the correct counts. */
2269 for (current = abfd->sections; current != NULL; current = current->next)
2270 if (current->reloc_count >= 0xffff || current->lineno_count >= 0xffff)
2274 align_adjust = false;
2275 for (current = abfd->sections, count = 1;
2276 current != (asection *) NULL;
2277 current = current->next, ++count)
2279 #ifdef COFF_IMAGE_WITH_PE
2280 /* The NT loader does not want empty section headers, so we omit
2281 them. We don't actually remove the section from the BFD,
2282 although we probably should. This matches code in
2283 coff_write_object_contents. */
2284 if (current->_raw_size == 0)
2286 current->target_index = -1;
2292 current->target_index = count;
2294 /* Only deal with sections which have contents */
2295 if (!(current->flags & SEC_HAS_CONTENTS))
2298 /* Align the sections in the file to the same boundary on
2299 which they are aligned in virtual memory. I960 doesn't
2300 do this (FIXME) so we can stay in sync with Intel. 960
2301 doesn't yet page from files... */
2302 #ifdef ALIGN_SECTIONS_IN_FILE
2303 if ((abfd->flags & EXEC_P) != 0)
2305 /* make sure this section is aligned on the right boundary - by
2306 padding the previous section up if necessary */
2309 sofar = BFD_ALIGN (sofar, 1 << current->alignment_power);
2310 if (previous != (asection *) NULL)
2312 previous->_raw_size += sofar - old_sofar;
2318 /* In demand paged files the low order bits of the file offset
2319 must match the low order bits of the virtual address. */
2320 #ifdef COFF_PAGE_SIZE
2321 if ((abfd->flags & D_PAGED) != 0
2322 && (current->flags & SEC_ALLOC) != 0)
2323 sofar += (current->vma - sofar) % page_size;
2325 current->filepos = sofar;
2327 #ifdef COFF_IMAGE_WITH_PE
2328 /* With PE we have to pad each section to be a multiple of its
2329 page size too, and remember both sizes. */
2331 if (coff_section_data (abfd, current) == NULL)
2333 current->used_by_bfd =
2334 (PTR) bfd_zalloc (abfd, sizeof (struct coff_section_tdata));
2335 if (current->used_by_bfd == NULL)
2338 if (pei_section_data (abfd, current) == NULL)
2340 coff_section_data (abfd, current)->tdata =
2341 (PTR) bfd_zalloc (abfd, sizeof (struct pei_section_tdata));
2342 if (coff_section_data (abfd, current)->tdata == NULL)
2345 if (pei_section_data (abfd, current)->virt_size == 0)
2346 pei_section_data (abfd, current)->virt_size = current->_raw_size;
2348 current->_raw_size = (current->_raw_size + page_size -1) & -page_size;
2351 sofar += current->_raw_size;
2353 #ifdef ALIGN_SECTIONS_IN_FILE
2354 /* make sure that this section is of the right size too */
2355 if ((abfd->flags & EXEC_P) == 0)
2357 bfd_size_type old_size;
2359 old_size = current->_raw_size;
2360 current->_raw_size = BFD_ALIGN (current->_raw_size,
2361 1 << current->alignment_power);
2362 align_adjust = current->_raw_size != old_size;
2363 sofar += current->_raw_size - old_size;
2368 sofar = BFD_ALIGN (sofar, 1 << current->alignment_power);
2369 align_adjust = sofar != old_sofar;
2370 current->_raw_size += sofar - old_sofar;
2374 #ifdef COFF_IMAGE_WITH_PE
2375 /* For PE we need to make sure we pad out to the aligned
2376 _raw_size, in case the caller only writes out data to the
2377 unaligned _raw_size. */
2378 if (pei_section_data (abfd, current)->virt_size < current->_raw_size)
2379 align_adjust = true;
2383 /* Force .lib sections to start at zero. The vma is then
2384 incremented in coff_set_section_contents. This is right for
2386 if (strcmp (current->name, _LIB) == 0)
2387 bfd_set_section_vma (abfd, current, 0);
2393 /* It is now safe to write to the output file. If we needed an
2394 alignment adjustment for the last section, then make sure that
2395 there is a byte at offset sofar. If there are no symbols and no
2396 relocs, then nothing follows the last section. If we don't force
2397 the last byte out, then the file may appear to be truncated. */
2403 if (bfd_seek (abfd, sofar - 1, SEEK_SET) != 0
2404 || bfd_write (&b, 1, 1, abfd) != 1)
2408 /* Make sure the relocations are aligned. We don't need to make
2409 sure that this byte exists, because it will only matter if there
2410 really are relocs. */
2411 sofar = BFD_ALIGN (sofar, 1 << COFF_DEFAULT_SECTION_ALIGNMENT_POWER);
2413 obj_relocbase (abfd) = sofar;
2414 abfd->output_has_begun = true;
2421 /* This can never work, because it is called too late--after the
2422 section positions have been set. I can't figure out what it is
2423 for, so I am going to disable it--Ian Taylor 20 March 1996. */
2425 /* If .file, .text, .data, .bss symbols are missing, add them. */
2426 /* @@ Should we only be adding missing symbols, or overriding the aux
2427 values for existing section symbols? */
2429 coff_add_missing_symbols (abfd)
2432 unsigned int nsyms = bfd_get_symcount (abfd);
2433 asymbol **sympp = abfd->outsymbols;
2436 int need_text = 1, need_data = 1, need_bss = 1, need_file = 1;
2438 for (i = 0; i < nsyms; i++)
2440 coff_symbol_type *csym = coff_symbol_from (abfd, sympp[i]);
2444 /* only do this if there is a coff representation of the input
2446 if (csym->native && csym->native->u.syment.n_sclass == C_FILE)
2451 name = csym->symbol.name;
2454 if (!strcmp (name, _TEXT))
2457 else if (!strcmp (name, ".wtext"))
2460 else if (!strcmp (name, _DATA))
2462 else if (!strcmp (name, _BSS))
2466 /* Now i == bfd_get_symcount (abfd). */
2467 /* @@ For now, don't deal with .file symbol. */
2470 if (!need_text && !need_data && !need_bss && !need_file)
2472 nsyms += need_text + need_data + need_bss + need_file;
2473 sympp2 = (asymbol **) bfd_alloc (abfd, nsyms * sizeof (asymbol *));
2476 memcpy (sympp2, sympp, i * sizeof (asymbol *));
2479 /* @@ Generate fake .file symbol, in sympp2[i], and increment i. */
2483 sympp2[i++] = coff_section_symbol (abfd, _TEXT);
2485 sympp2[i++] = coff_section_symbol (abfd, _DATA);
2487 sympp2[i++] = coff_section_symbol (abfd, _BSS);
2488 BFD_ASSERT (i == nsyms);
2489 bfd_set_symtab (abfd, sympp2, nsyms);
2498 coff_write_object_contents (abfd)
2502 boolean hasrelocs = false;
2503 boolean haslinno = false;
2505 file_ptr reloc_base;
2506 file_ptr lineno_base;
2508 unsigned long reloc_size = 0;
2509 unsigned long lnno_size = 0;
2510 boolean long_section_names;
2511 asection *text_sec = NULL;
2512 asection *data_sec = NULL;
2513 asection *bss_sec = NULL;
2514 struct internal_filehdr internal_f;
2515 struct internal_aouthdr internal_a;
2516 #ifdef COFF_LONG_SECTION_NAMES
2517 size_t string_size = STRING_SIZE_SIZE;
2520 bfd_set_error (bfd_error_system_call);
2522 /* Make a pass through the symbol table to count line number entries and
2523 put them into the correct asections */
2525 lnno_size = coff_count_linenumbers (abfd) * LINESZ;
2527 if (abfd->output_has_begun == false)
2529 if (! coff_compute_section_file_positions (abfd))
2533 reloc_base = obj_relocbase (abfd);
2535 /* Work out the size of the reloc and linno areas */
2537 for (current = abfd->sections; current != NULL; current =
2539 reloc_size += current->reloc_count * RELSZ;
2541 lineno_base = reloc_base + reloc_size;
2542 sym_base = lineno_base + lnno_size;
2544 /* Indicate in each section->line_filepos its actual file address */
2545 for (current = abfd->sections; current != NULL; current =
2548 if (current->lineno_count)
2550 current->line_filepos = lineno_base;
2551 current->moving_line_filepos = lineno_base;
2552 lineno_base += current->lineno_count * LINESZ;
2556 current->line_filepos = 0;
2558 if (current->reloc_count)
2560 current->rel_filepos = reloc_base;
2561 reloc_base += current->reloc_count * RELSZ;
2565 current->rel_filepos = 0;
2569 /* Write section headers to the file. */
2570 internal_f.f_nscns = 0;
2572 if ((abfd->flags & EXEC_P) != 0)
2573 scn_base = FILHSZ + AOUTSZ;
2578 if (xcoff_data (abfd)->full_aouthdr)
2581 scn_base += SMALL_AOUTSZ;
2585 if (bfd_seek (abfd, scn_base, SEEK_SET) != 0)
2588 long_section_names = false;
2589 for (current = abfd->sections;
2591 current = current->next)
2593 struct internal_scnhdr section;
2596 /* If we've got a .reloc section, remember. */
2598 #ifdef COFF_IMAGE_WITH_PE
2599 if (strcmp (current->name, ".reloc") == 0)
2601 pe_data (abfd)->has_reloc_section = 1;
2606 internal_f.f_nscns++;
2608 strncpy (section.s_name, current->name, SCNNMLEN);
2610 #ifdef COFF_LONG_SECTION_NAMES
2611 /* Handle long section names as in PE. This must be compatible
2612 with the code in coff_write_symbols. */
2616 len = strlen (current->name);
2619 memset (section.s_name, 0, SCNNMLEN);
2620 sprintf (section.s_name, "/%lu", (unsigned long) string_size);
2621 string_size += len + 1;
2622 long_section_names = true;
2628 /* Always set s_vaddr of .lib to 0. This is right for SVR3.2
2629 Ian Taylor <ian@cygnus.com>. */
2630 if (strcmp (current->name, _LIB) == 0)
2631 section.s_vaddr = 0;
2634 section.s_vaddr = current->vma;
2635 section.s_paddr = current->lma;
2636 section.s_size = current->_raw_size;
2639 section.s_paddr = 0;
2641 #ifdef COFF_IMAGE_WITH_PE
2642 /* Reminder: s_paddr holds the virtual size of the section. */
2643 if (coff_section_data (abfd, current) != NULL
2644 && pei_section_data (abfd, current) != NULL)
2645 section.s_paddr = pei_section_data (abfd, current)->virt_size;
2647 section.s_paddr = 0;
2651 If this section has no size or is unloadable then the scnptr
2654 if (current->_raw_size == 0 ||
2655 (current->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2657 section.s_scnptr = 0;
2661 section.s_scnptr = current->filepos;
2663 section.s_relptr = current->rel_filepos;
2664 section.s_lnnoptr = current->line_filepos;
2665 section.s_nreloc = current->reloc_count;
2666 section.s_nlnno = current->lineno_count;
2667 if (current->reloc_count != 0)
2669 if (current->lineno_count != 0)
2673 /* Indicate the use of an XCOFF overflow section header. */
2674 if (current->reloc_count >= 0xffff || current->lineno_count >= 0xffff)
2676 section.s_nreloc = 0xffff;
2677 section.s_nlnno = 0xffff;
2681 section.s_flags = sec_to_styp_flags (current->name, current->flags);
2683 if (!strcmp (current->name, _TEXT))
2687 else if (!strcmp (current->name, _DATA))
2691 else if (!strcmp (current->name, _BSS))
2697 section.s_align = (current->alignment_power
2698 ? 1 << current->alignment_power
2702 #ifdef COFF_IMAGE_WITH_PE
2703 /* suppress output of the sections if they are null. ld includes
2704 the bss and data sections even if there is no size assigned
2705 to them. NT loader doesn't like it if these section headers are
2706 included if the sections themselves are not needed */
2707 if (section.s_size == 0)
2708 internal_f.f_nscns--;
2713 if (coff_swap_scnhdr_out (abfd, §ion, &buff) == 0
2714 || bfd_write ((PTR) (&buff), 1, SCNHSZ, abfd) != SCNHSZ)
2719 /* PE stores COMDAT section information in the symbol table. If
2720 this section is supposed to have some COMDAT info, track down
2721 the symbol in the symbol table and modify it. */
2722 if ((current->flags & SEC_LINK_ONCE) != 0)
2724 unsigned int i, count;
2726 coff_symbol_type *csym = NULL;
2730 count = bfd_get_symcount (abfd);
2731 for (i = 0, psym = abfd->outsymbols; i < count; i++, psym++)
2733 if ((*psym)->section != current)
2736 /* Remember the location of the first symbol in this
2738 if (psymsec == NULL)
2741 /* See if this is the section symbol. */
2742 if (strcmp ((*psym)->name, current->name) == 0)
2744 csym = coff_symbol_from (abfd, *psym);
2746 || csym->native == NULL
2747 || csym->native->u.syment.n_numaux < 1
2748 || csym->native->u.syment.n_sclass != C_STAT
2749 || csym->native->u.syment.n_type != T_NULL)
2752 /* Here *PSYM is the section symbol for CURRENT. */
2759 Note that we might not if we're converting the file from
2760 some other object file format. */
2763 combined_entry_type *aux;
2765 /* We don't touch the x_checksum field. The
2766 x_associated field is not currently supported. */
2768 aux = csym->native + 1;
2769 switch (current->flags & SEC_LINK_DUPLICATES)
2771 case SEC_LINK_DUPLICATES_DISCARD:
2772 aux->u.auxent.x_scn.x_comdat = IMAGE_COMDAT_SELECT_ANY;
2775 case SEC_LINK_DUPLICATES_ONE_ONLY:
2776 aux->u.auxent.x_scn.x_comdat =
2777 IMAGE_COMDAT_SELECT_NODUPLICATES;
2780 case SEC_LINK_DUPLICATES_SAME_SIZE:
2781 aux->u.auxent.x_scn.x_comdat =
2782 IMAGE_COMDAT_SELECT_SAME_SIZE;
2785 case SEC_LINK_DUPLICATES_SAME_CONTENTS:
2786 aux->u.auxent.x_scn.x_comdat =
2787 IMAGE_COMDAT_SELECT_EXACT_MATCH;
2791 /* The COMDAT symbol must be the first symbol from this
2792 section in the symbol table. In order to make this
2793 work, we move the COMDAT symbol before the first
2794 symbol we found in the search above. It's OK to
2795 rearrange the symbol table at this point, because
2796 coff_renumber_symbols is going to rearrange it
2797 further and fix up all the aux entries. */
2798 if (psym != psymsec)
2804 for (pcopy = psym; pcopy > psymsec; pcopy--)
2805 pcopy[0] = pcopy[-1];
2810 #endif /* COFF_WITH_PE */
2814 /* XCOFF handles overflows in the reloc and line number count fields
2815 by creating a new section header to hold the correct values. */
2816 for (current = abfd->sections; current != NULL; current = current->next)
2818 if (current->reloc_count >= 0xffff || current->lineno_count >= 0xffff)
2820 struct internal_scnhdr scnhdr;
2823 internal_f.f_nscns++;
2824 strncpy (&(scnhdr.s_name[0]), current->name, 8);
2825 scnhdr.s_paddr = current->reloc_count;
2826 scnhdr.s_vaddr = current->lineno_count;
2828 scnhdr.s_scnptr = 0;
2829 scnhdr.s_relptr = current->rel_filepos;
2830 scnhdr.s_lnnoptr = current->line_filepos;
2831 scnhdr.s_nreloc = current->target_index;
2832 scnhdr.s_nlnno = current->target_index;
2833 scnhdr.s_flags = STYP_OVRFLO;
2834 if (coff_swap_scnhdr_out (abfd, &scnhdr, &buff) == 0
2835 || bfd_write ((PTR) &buff, 1, SCNHSZ, abfd) != SCNHSZ)
2841 /* OK, now set up the filehdr... */
2843 /* Don't include the internal abs section in the section count */
2846 We will NOT put a fucking timestamp in the header here. Every time you
2847 put it back, I will come in and take it out again. I'm sorry. This
2848 field does not belong here. We fill it with a 0 so it compares the
2849 same but is not a reasonable time. -- gnu@cygnus.com
2851 internal_f.f_timdat = 0;
2853 internal_f.f_flags = 0;
2855 if (abfd->flags & EXEC_P)
2856 internal_f.f_opthdr = AOUTSZ;
2859 internal_f.f_opthdr = 0;
2861 if (xcoff_data (abfd)->full_aouthdr)
2862 internal_f.f_opthdr = AOUTSZ;
2864 internal_f.f_opthdr = SMALL_AOUTSZ;
2869 internal_f.f_flags |= F_RELFLG;
2871 internal_f.f_flags |= F_LNNO;
2872 if (abfd->flags & EXEC_P)
2873 internal_f.f_flags |= F_EXEC;
2875 /* FIXME: this is wrong for PPC_PE! */
2876 if (bfd_little_endian (abfd))
2877 internal_f.f_flags |= F_AR32WR;
2879 internal_f.f_flags |= F_AR32W;
2883 FIXME, should do something about the other byte orders and
2888 if ((abfd->flags & DYNAMIC) != 0)
2889 internal_f.f_flags |= F_SHROBJ;
2890 if (bfd_get_section_by_name (abfd, _LOADER) != NULL)
2891 internal_f.f_flags |= F_DYNLOAD;
2894 memset (&internal_a, 0, sizeof internal_a);
2896 /* Set up architecture-dependent stuff */
2899 unsigned int magic = 0;
2900 unsigned short flags = 0;
2901 coff_set_flags (abfd, &magic, &flags);
2902 internal_f.f_magic = magic;
2903 internal_f.f_flags |= flags;
2904 /* ...and the "opt"hdr... */
2907 #ifdef ULTRA3 /* NYU's machine */
2908 /* FIXME: This is a bogus check. I really want to see if there
2909 * is a .shbss or a .shdata section, if so then set the magic
2910 * number to indicate a shared data executable.
2912 if (internal_f.f_nscns >= 7)
2913 internal_a.magic = SHMAGIC; /* Shared magic */
2916 internal_a.magic = NMAGIC; /* Assume separate i/d */
2917 #define __A_MAGIC_SET__
2920 /* FIXME: What are the a.out magic numbers for the i860? */
2921 internal_a.magic = 0;
2922 #define __A_MAGIC_SET__
2925 internal_a.magic = (magic == I960ROMAGIC ? NMAGIC : OMAGIC);
2926 #define __A_MAGIC_SET__
2929 #define __A_MAGIC_SET__
2930 internal_a.magic = PAGEMAGICBCS;
2934 #define __A_MAGIC_SET__
2935 internal_a.magic = APOLLO_COFF_VERSION_NUMBER;
2938 #if defined(M68) || defined(WE32K) || defined(M68K)
2939 #define __A_MAGIC_SET__
2941 internal_a.magic = LYNXCOFFMAGIC;
2943 #if defined(TARG_AUX)
2944 internal_a.magic = (abfd->flags & D_PAGED ? PAGEMAGICPEXECPAGED :
2945 abfd->flags & WP_TEXT ? PAGEMAGICPEXECSWAPPED :
2946 PAGEMAGICEXECSWAPPED);
2948 #if defined (PAGEMAGICPEXECPAGED)
2949 internal_a.magic = PAGEMAGICPEXECPAGED;
2951 #endif /* TARG_AUX */
2953 #endif /* M68 || WE32K || M68K */
2956 #define __A_MAGIC_SET__
2957 internal_a.magic = ZMAGIC;
2961 #define __A_MAGIC_SET__
2962 internal_a.magic = IMAGE_NT_OPTIONAL_HDR_MAGIC;
2966 #define __A_MAGIC_SET__
2968 internal_a.magic = LYNXCOFFMAGIC;
2970 internal_a.magic = ZMAGIC;
2975 #define __A_MAGIC_SET__
2977 internal_a.magic = LYNXCOFFMAGIC;
2982 #define __A_MAGIC_SET__
2983 internal_a.magic = (abfd->flags & D_PAGED) ? RS6K_AOUTHDR_ZMAGIC :
2984 (abfd->flags & WP_TEXT) ? RS6K_AOUTHDR_NMAGIC :
2985 RS6K_AOUTHDR_OMAGIC;
2988 #ifndef __A_MAGIC_SET__
2989 #include "Your aouthdr magic number is not being set!"
2991 #undef __A_MAGIC_SET__
2995 /* FIXME: Does anybody ever set this to another value? */
2996 internal_a.vstamp = 0;
2998 /* Now should write relocs, strings, syms */
2999 obj_sym_filepos (abfd) = sym_base;
3001 if (bfd_get_symcount (abfd) != 0)
3005 if (!coff_add_missing_symbols (abfd))
3008 if (!coff_renumber_symbols (abfd, &firstundef))
3010 coff_mangle_symbols (abfd);
3011 if (! coff_write_symbols (abfd))
3013 if (! coff_write_linenumbers (abfd))
3015 if (! coff_write_relocs (abfd, firstundef))
3018 #ifdef COFF_IMAGE_WITH_PE
3020 else if ((abfd->flags & EXEC_P) != 0)
3024 /* PowerPC PE appears to require that all executable files be
3025 rounded up to the page size. */
3028 BFD_ALIGN (sym_base, COFF_PAGE_SIZE) - 1,
3030 || bfd_write (&b, 1, 1, abfd) != 1)
3036 /* If bfd_get_symcount (abfd) != 0, then we are not using the COFF
3037 backend linker, and obj_raw_syment_count is not valid until after
3038 coff_write_symbols is called. */
3039 if (obj_raw_syment_count (abfd) != 0)
3041 internal_f.f_symptr = sym_base;
3043 /* AIX appears to require that F_RELFLG not be set if there are
3044 local symbols but no relocations. */
3045 internal_f.f_flags &=~ F_RELFLG;
3050 if (long_section_names)
3051 internal_f.f_symptr = sym_base;
3053 internal_f.f_symptr = 0;
3054 internal_f.f_flags |= F_LSYMS;
3059 internal_a.tsize = bfd_get_section_size_before_reloc (text_sec);
3060 internal_a.text_start = internal_a.tsize ? text_sec->vma : 0;
3064 internal_a.dsize = bfd_get_section_size_before_reloc (data_sec);
3065 internal_a.data_start = internal_a.dsize ? data_sec->vma : 0;
3069 internal_a.bsize = bfd_get_section_size_before_reloc (bss_sec);
3070 if (internal_a.bsize && bss_sec->vma < internal_a.data_start)
3071 internal_a.data_start = bss_sec->vma;
3074 internal_a.entry = bfd_get_start_address (abfd);
3075 internal_f.f_nsyms = obj_raw_syment_count (abfd);
3078 if (xcoff_data (abfd)->full_aouthdr)
3081 asection *loader_sec;
3083 internal_a.vstamp = 1;
3085 internal_a.o_snentry = xcoff_data (abfd)->snentry;
3086 if (internal_a.o_snentry == 0)
3087 internal_a.entry = (bfd_vma) -1;
3089 if (text_sec != NULL)
3091 internal_a.o_sntext = text_sec->target_index;
3092 internal_a.o_algntext = bfd_get_section_alignment (abfd, text_sec);
3096 internal_a.o_sntext = 0;
3097 internal_a.o_algntext = 0;
3099 if (data_sec != NULL)
3101 internal_a.o_sndata = data_sec->target_index;
3102 internal_a.o_algndata = bfd_get_section_alignment (abfd, data_sec);
3106 internal_a.o_sndata = 0;
3107 internal_a.o_algndata = 0;
3109 loader_sec = bfd_get_section_by_name (abfd, ".loader");
3110 if (loader_sec != NULL)
3111 internal_a.o_snloader = loader_sec->target_index;
3113 internal_a.o_snloader = 0;
3114 if (bss_sec != NULL)
3115 internal_a.o_snbss = bss_sec->target_index;
3117 internal_a.o_snbss = 0;
3119 toc = xcoff_data (abfd)->toc;
3120 internal_a.o_toc = toc;
3121 internal_a.o_sntoc = xcoff_data (abfd)->sntoc;
3123 internal_a.o_modtype = xcoff_data (abfd)->modtype;
3124 if (xcoff_data (abfd)->cputype != -1)
3125 internal_a.o_cputype = xcoff_data (abfd)->cputype;
3128 switch (bfd_get_arch (abfd))
3130 case bfd_arch_rs6000:
3131 internal_a.o_cputype = 4;
3133 case bfd_arch_powerpc:
3134 if (bfd_get_mach (abfd) == 0)
3135 internal_a.o_cputype = 3;
3137 internal_a.o_cputype = 1;
3143 internal_a.o_maxstack = xcoff_data (abfd)->maxstack;
3144 internal_a.o_maxdata = xcoff_data (abfd)->maxdata;
3148 /* now write them */
3149 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
3153 coff_swap_filehdr_out (abfd, (PTR) & internal_f, (PTR) buff);
3154 if (bfd_write ((PTR) buff, 1, FILHSZ, abfd) != FILHSZ)
3157 if (abfd->flags & EXEC_P)
3159 /* Note that peicode.h fills in a PEAOUTHDR, not an AOUTHDR.
3160 include/coff/pe.h sets AOUTSZ == sizeof(PEAOUTHDR)) */
3162 coff_swap_aouthdr_out (abfd, (PTR) & internal_a, (PTR) buff);
3163 if (bfd_write ((PTR) buff, 1, AOUTSZ, abfd) != AOUTSZ)
3172 /* XCOFF seems to always write at least a small a.out header. */
3173 coff_swap_aouthdr_out (abfd, (PTR) &internal_a, (PTR) &buff);
3174 if (xcoff_data (abfd)->full_aouthdr)
3177 size = SMALL_AOUTSZ;
3178 if (bfd_write ((PTR) &buff, 1, size, abfd) != size)
3187 coff_set_section_contents (abfd, section, location, offset, count)
3192 bfd_size_type count;
3194 if (abfd->output_has_begun == false) /* set by bfd.c handler */
3196 if (! coff_compute_section_file_positions (abfd))
3200 #if defined(_LIB) && !defined(TARG_AUX)
3202 /* The physical address field of a .lib section is used to hold the
3203 number of shared libraries in the section. This code counts the
3204 number of sections being written, and increments the lma field
3207 I have found no documentation on the contents of this section.
3208 Experimentation indicates that the section contains zero or more
3209 records, each of which has the following structure:
3211 - a (four byte) word holding the length of this record, in words,
3212 - a word that always seems to be set to "2",
3213 - the path to a shared library, null-terminated and then padded
3214 to a whole word boundary.
3216 bfd_assert calls have been added to alert if an attempt is made
3217 to write a section which doesn't follow these assumptions. The
3218 code has been tested on ISC 4.1 by me, and on SCO by Robert Lipe
3219 <robertl@arnet.com> (Thanks!).
3221 Gvran Uddeborg <gvran@uddeborg.pp.se> */
3223 if (strcmp (section->name, _LIB) == 0)
3225 bfd_byte *rec, *recend;
3227 rec = (bfd_byte *) location;
3228 recend = rec + count;
3229 while (rec < recend)
3232 rec += bfd_get_32 (abfd, rec) * 4;
3235 BFD_ASSERT (rec == recend);
3240 /* Don't write out bss sections - one way to do this is to
3241 see if the filepos has not been set. */
3242 if (section->filepos == 0)
3245 if (bfd_seek (abfd, (file_ptr) (section->filepos + offset), SEEK_SET) != 0)
3250 return (bfd_write (location, 1, count, abfd) == count) ? true : false;
3256 coff_close_and_cleanup (abfd)
3259 if (!bfd_read_p (abfd))
3260 switch (abfd->format)
3263 if (!_bfd_write_archive_contents (abfd))
3267 if (!coff_write_object_contents (abfd))
3271 bfd_set_error (bfd_error_invalid_operation);
3275 /* We depend on bfd_close to free all the memory on the objalloc. */
3282 buy_and_read (abfd, where, seek_direction, size)
3288 PTR area = (PTR) bfd_alloc (abfd, size);
3291 if (bfd_seek (abfd, where, seek_direction) != 0
3292 || bfd_read (area, 1, size, abfd) != size)
3295 } /* buy_and_read() */
3301 Creating the linenumber table is done by reading in the entire
3302 coff linenumber table, and creating another table for internal use.
3304 A coff linenumber table is structured so that each function
3305 is marked as having a line number of 0. Each line within the
3306 function is an offset from the first line in the function. The
3307 base of the line number information for the table is stored in
3308 the symbol associated with the function.
3310 The information is copied from the external to the internal
3311 table, and each symbol which marks a function is marked by
3314 How does this work ?
3319 coff_slurp_line_table (abfd, asect)
3323 LINENO *native_lineno;
3324 alent *lineno_cache;
3326 BFD_ASSERT (asect->lineno == (alent *) NULL);
3328 native_lineno = (LINENO *) buy_and_read (abfd,
3329 asect->line_filepos,
3332 asect->lineno_count));
3334 (alent *) bfd_alloc (abfd, (size_t) ((asect->lineno_count + 1) * sizeof (alent)));
3335 if (lineno_cache == NULL)
3339 unsigned int counter = 0;
3340 alent *cache_ptr = lineno_cache;
3341 LINENO *src = native_lineno;
3343 while (counter < asect->lineno_count)
3345 struct internal_lineno dst;
3346 coff_swap_lineno_in (abfd, src, &dst);
3347 cache_ptr->line_number = dst.l_lnno;
3349 if (cache_ptr->line_number == 0)
3353 coff_symbol_type *sym;
3356 symndx = dst.l_addr.l_symndx;
3358 || (unsigned long) symndx >= obj_raw_syment_count (abfd))
3360 (*_bfd_error_handler)
3361 ("%s: warning: illegal symbol index %ld in line numbers",
3362 bfd_get_filename (abfd), dst.l_addr.l_symndx);
3366 /* FIXME: We should not be casting between ints and
3367 pointers like this. */
3368 sym = ((coff_symbol_type *)
3369 ((symndx + obj_raw_syments (abfd))
3370 ->u.syment._n._n_n._n_zeroes));
3371 cache_ptr->u.sym = (asymbol *) sym;
3372 if (sym->lineno != NULL && ! warned)
3374 (*_bfd_error_handler)
3375 ("%s: warning: duplicate line number information for `%s'",
3376 bfd_get_filename (abfd),
3377 bfd_asymbol_name (&sym->symbol));
3379 sym->lineno = cache_ptr;
3383 cache_ptr->u.offset = dst.l_addr.l_paddr
3384 - bfd_section_vma (abfd, asect);
3385 } /* If no linenumber expect a symbol index */
3391 cache_ptr->line_number = 0;
3394 asect->lineno = lineno_cache;
3395 /* FIXME, free native_lineno here, or use alloca or something. */
3400 coff_slurp_symbol_table (abfd)
3403 combined_entry_type *native_symbols;
3404 coff_symbol_type *cached_area;
3405 unsigned int *table_ptr;
3407 unsigned int number_of_symbols = 0;
3409 if (obj_symbols (abfd))
3412 /* Read in the symbol table */
3413 if ((native_symbols = coff_get_normalized_symtab (abfd)) == NULL)
3418 /* Allocate enough room for all the symbols in cached form */
3419 cached_area = ((coff_symbol_type *)
3421 (obj_raw_syment_count (abfd)
3422 * sizeof (coff_symbol_type))));
3424 if (cached_area == NULL)
3426 table_ptr = ((unsigned int *)
3428 (obj_raw_syment_count (abfd)
3429 * sizeof (unsigned int))));
3431 if (table_ptr == NULL)
3435 coff_symbol_type *dst = cached_area;
3436 unsigned int last_native_index = obj_raw_syment_count (abfd);
3437 unsigned int this_index = 0;
3438 while (this_index < last_native_index)
3440 combined_entry_type *src = native_symbols + this_index;
3441 table_ptr[this_index] = number_of_symbols;
3442 dst->symbol.the_bfd = abfd;
3444 dst->symbol.name = (char *) (src->u.syment._n._n_n._n_offset);
3445 /* We use the native name field to point to the cached field. */
3446 src->u.syment._n._n_n._n_zeroes = (long) dst;
3447 dst->symbol.section = coff_section_from_bfd_index (abfd,
3448 src->u.syment.n_scnum);
3449 dst->symbol.flags = 0;
3450 dst->done_lineno = false;
3452 switch (src->u.syment.n_sclass)
3457 dst->symbol.value = src->u.syment.n_value - dst->symbol.section->vma;
3458 dst->symbol.flags = BSF_EXPORT | BSF_GLOBAL;
3459 dst->symbol.flags |= BSF_NOT_AT_END | BSF_FUNCTION;
3461 /* Fall through to next case */
3468 case C_THUMBEXTFUNC:
3474 case C_SYSTEM: /* System Wide variable */
3477 /* PE uses storage class 0x68 to denote a section symbol */
3479 /* PE uses storage class 0x67 for a weak external symbol. */
3482 if ((src->u.syment.n_scnum) == 0)
3484 if ((src->u.syment.n_value) == 0)
3486 dst->symbol.section = bfd_und_section_ptr;
3487 dst->symbol.value = 0;
3491 dst->symbol.section = bfd_com_section_ptr;
3492 dst->symbol.value = (src->u.syment.n_value);
3497 /* Base the value as an index from the base of the
3500 dst->symbol.flags = BSF_EXPORT | BSF_GLOBAL;
3502 #if defined COFF_WITH_PE
3503 /* PE sets the symbol to a value relative to the
3504 start of the section. */
3505 dst->symbol.value = src->u.syment.n_value;
3507 dst->symbol.value = (src->u.syment.n_value
3508 - dst->symbol.section->vma);
3511 if (ISFCN ((src->u.syment.n_type)))
3513 /* A function ext does not go at the end of a
3515 dst->symbol.flags |= BSF_NOT_AT_END | BSF_FUNCTION;
3520 /* A C_HIDEXT symbol is not global. */
3521 if (src->u.syment.n_sclass == C_HIDEXT)
3522 dst->symbol.flags = BSF_LOCAL;
3523 /* A symbol with a csect entry should not go at the end. */
3524 if (src->u.syment.n_numaux > 0)
3525 dst->symbol.flags |= BSF_NOT_AT_END;
3529 if (src->u.syment.n_sclass == C_NT_WEAK)
3530 dst->symbol.flags = BSF_WEAK;
3535 case C_STAT: /* static */
3537 case C_LEAFSTAT: /* static leaf procedure */
3540 case C_THUMBSTAT: /* Thumb static */
3541 case C_THUMBLABEL: /* Thumb label */
3542 case C_THUMBSTATFUNC:/* Thumb static function */
3544 case C_LABEL: /* label */
3545 if (src->u.syment.n_scnum == -2)
3546 dst->symbol.flags = BSF_DEBUGGING;
3548 dst->symbol.flags = BSF_LOCAL;
3550 /* Base the value as an index from the base of the
3551 section, if there is one. */
3552 if (dst->symbol.section)
3554 #if defined COFF_WITH_PE
3555 /* PE sets the symbol to a value relative to the
3556 start of the section. */
3557 dst->symbol.value = src->u.syment.n_value;
3559 dst->symbol.value = (src->u.syment.n_value
3560 - dst->symbol.section->vma);
3564 dst->symbol.value = src->u.syment.n_value;
3567 case C_MOS: /* member of structure */
3568 case C_EOS: /* end of structure */
3569 #ifdef NOTDEF /* C_AUTOARG has the same value */
3571 case C_GLBLREG: /* A29k-specific storage class */
3574 case C_REGPARM: /* register parameter */
3575 case C_REG: /* register variable */
3577 case C_AUTOARG: /* 960-specific storage class */
3579 case C_TPDEF: /* type definition */
3581 case C_AUTO: /* automatic variable */
3582 case C_FIELD: /* bit field */
3583 case C_ENTAG: /* enumeration tag */
3584 case C_MOE: /* member of enumeration */
3585 case C_MOU: /* member of union */
3586 case C_UNTAG: /* union tag */
3587 dst->symbol.flags = BSF_DEBUGGING;
3588 dst->symbol.value = (src->u.syment.n_value);
3591 case C_FILE: /* file name */
3592 case C_STRTAG: /* structure tag */
3607 dst->symbol.flags = BSF_DEBUGGING;
3608 dst->symbol.value = (src->u.syment.n_value);
3612 case C_BINCL: /* beginning of include file */
3613 case C_EINCL: /* ending of include file */
3614 /* The value is actually a pointer into the line numbers
3615 of the file. We locate the line number entry, and
3616 set the section to the section which contains it, and
3617 the value to the index in that section. */
3621 dst->symbol.flags = BSF_DEBUGGING;
3622 for (sec = abfd->sections; sec != NULL; sec = sec->next)
3623 if (sec->line_filepos <= (file_ptr) src->u.syment.n_value
3624 && ((file_ptr) (sec->line_filepos
3625 + sec->lineno_count * LINESZ)
3626 > (file_ptr) src->u.syment.n_value))
3629 dst->symbol.value = 0;
3632 dst->symbol.section = sec;
3633 dst->symbol.value = ((src->u.syment.n_value
3634 - sec->line_filepos)
3642 dst->symbol.flags = BSF_DEBUGGING;
3644 /* The value is actually a symbol index. Save a pointer
3645 to the symbol instead of the index. FIXME: This
3646 should use a union. */
3647 src->u.syment.n_value =
3648 (long) (native_symbols + src->u.syment.n_value);
3649 dst->symbol.value = src->u.syment.n_value;
3654 case C_BLOCK: /* ".bb" or ".eb" */
3655 case C_FCN: /* ".bf" or ".ef" */
3656 case C_EFCN: /* physical end of function */
3657 dst->symbol.flags = BSF_LOCAL;
3658 #if defined COFF_WITH_PE
3659 /* PE sets the symbol to a value relative to the start
3661 dst->symbol.value = src->u.syment.n_value;
3663 /* Base the value as an index from the base of the
3665 dst->symbol.value = (src->u.syment.n_value
3666 - dst->symbol.section->vma);
3671 case C_EXTDEF: /* external definition */
3672 case C_ULABEL: /* undefined label */
3673 case C_USTATIC: /* undefined static */
3674 #ifndef COFF_WITH_PE
3675 /* C_LINE in regular coff is 0x68. NT has taken over this storage
3676 class to represent a section symbol */
3677 case C_LINE: /* line # reformatted as symbol table entry */
3678 /* NT uses 0x67 for a weak symbol, not C_ALIAS. */
3679 case C_ALIAS: /* duplicate tag */
3681 case C_HIDDEN: /* ext symbol in dmert public lib */
3683 (*_bfd_error_handler)
3684 ("%s: Unrecognized storage class %d for %s symbol `%s'",
3685 bfd_get_filename (abfd), src->u.syment.n_sclass,
3686 dst->symbol.section->name, dst->symbol.name);
3687 dst->symbol.flags = BSF_DEBUGGING;
3688 dst->symbol.value = (src->u.syment.n_value);
3692 /* BFD_ASSERT(dst->symbol.flags != 0);*/
3696 dst->symbol.udata.i = 0;
3697 dst->lineno = (alent *) NULL;
3698 this_index += (src->u.syment.n_numaux) + 1;
3700 number_of_symbols++;
3701 } /* walk the native symtab */
3702 } /* bfdize the native symtab */
3704 obj_symbols (abfd) = cached_area;
3705 obj_raw_syments (abfd) = native_symbols;
3707 bfd_get_symcount (abfd) = number_of_symbols;
3708 obj_convert (abfd) = table_ptr;
3709 /* Slurp the line tables for each section too */
3715 coff_slurp_line_table (abfd, p);
3720 } /* coff_slurp_symbol_table() */
3722 /* Check whether a symbol is globally visible. This is used by the
3723 COFF backend linker code in cofflink.c, since a couple of targets
3724 have globally visible symbols which are not class C_EXT. This
3725 function need not handle the case of n_class == C_EXT. */
3727 #undef OTHER_GLOBAL_CLASS
3730 #define OTHER_GLOBAL_CLASS C_LEAFEXT
3734 #define OTHER_GLOBAL_CLASS C_THUMBEXT || syment->n_sclass == C_THUMBEXTFUNC
3737 #define OTHER_GLOBAL_CLASS C_SECTION
3741 #ifdef OTHER_GLOBAL_CLASS
3743 static boolean coff_sym_is_global PARAMS ((bfd *, struct internal_syment *));
3746 coff_sym_is_global (abfd, syment)
3748 struct internal_syment * syment;
3750 return (syment->n_sclass == OTHER_GLOBAL_CLASS);
3753 #undef OTHER_GLOBAL_CLASS
3755 #else /* ! defined (OTHER_GLOBAL_CLASS) */
3757 /* sym_is_global should not be defined if it has nothing to do. */
3759 #define coff_sym_is_global 0
3761 #endif /* ! defined (OTHER_GLOBAL_CLASS) */
3767 Coff relocations are easily transformed into the internal BFD form
3770 Reading a coff relocation table is done in the following stages:
3772 o Read the entire coff relocation table into memory.
3774 o Process each relocation in turn; first swap it from the
3775 external to the internal form.
3777 o Turn the symbol referenced in the relocation's symbol index
3778 into a pointer into the canonical symbol table.
3779 This table is the same as the one returned by a call to
3780 @code{bfd_canonicalize_symtab}. The back end will call that
3781 routine and save the result if a canonicalization hasn't been done.
3783 o The reloc index is turned into a pointer to a howto
3784 structure, in a back end specific way. For instance, the 386
3785 and 960 use the @code{r_type} to directly produce an index
3786 into a howto table vector; the 88k subtracts a number from the
3787 @code{r_type} field and creates an addend field.
3793 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
3795 coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \
3796 if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
3797 coffsym = (obj_symbols (abfd) \
3798 + (cache_ptr->sym_ptr_ptr - symbols)); \
3800 coffsym = coff_symbol_from (abfd, ptr); \
3801 if (coffsym != (coff_symbol_type *) NULL \
3802 && coffsym->native->u.syment.n_scnum == 0) \
3803 cache_ptr->addend = 0; \
3804 else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
3805 && ptr->section != (asection *) NULL) \
3806 cache_ptr->addend = - (ptr->section->vma + ptr->value); \
3808 cache_ptr->addend = 0; \
3813 coff_slurp_reloc_table (abfd, asect, symbols)
3818 RELOC *native_relocs;
3819 arelent *reloc_cache;
3824 if (asect->relocation)
3826 if (asect->reloc_count == 0)
3828 if (asect->flags & SEC_CONSTRUCTOR)
3830 if (!coff_slurp_symbol_table (abfd))
3833 (RELOC *) buy_and_read (abfd,
3837 asect->reloc_count));
3838 reloc_cache = (arelent *)
3839 bfd_alloc (abfd, (size_t) (asect->reloc_count * sizeof (arelent)));
3841 if (reloc_cache == NULL)
3845 for (idx = 0; idx < asect->reloc_count; idx++)
3847 struct internal_reloc dst;
3848 struct external_reloc *src;
3849 #ifndef RELOC_PROCESSING
3853 cache_ptr = reloc_cache + idx;
3854 src = native_relocs + idx;
3856 coff_swap_reloc_in (abfd, src, &dst);
3858 #ifdef RELOC_PROCESSING
3859 RELOC_PROCESSING (cache_ptr, &dst, symbols, abfd, asect);
3861 cache_ptr->address = dst.r_vaddr;
3863 if (dst.r_symndx != -1)
3865 if (dst.r_symndx < 0 || dst.r_symndx >= obj_conv_table_size (abfd))
3867 (*_bfd_error_handler)
3868 ("%s: warning: illegal symbol index %ld in relocs",
3869 bfd_get_filename (abfd), dst.r_symndx);
3870 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
3875 cache_ptr->sym_ptr_ptr = (symbols
3876 + obj_convert (abfd)[dst.r_symndx]);
3877 ptr = *(cache_ptr->sym_ptr_ptr);
3882 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
3886 /* The symbols definitions that we have read in have been
3887 relocated as if their sections started at 0. But the offsets
3888 refering to the symbols in the raw data have not been
3889 modified, so we have to have a negative addend to compensate.
3891 Note that symbols which used to be common must be left alone */
3893 /* Calculate any reloc addend by looking at the symbol */
3894 CALC_ADDEND (abfd, ptr, dst, cache_ptr);
3896 cache_ptr->address -= asect->vma;
3897 /* !! cache_ptr->section = (asection *) NULL;*/
3899 /* Fill in the cache_ptr->howto field from dst.r_type */
3900 RTYPE2HOWTO (cache_ptr, &dst);
3901 #endif /* RELOC_PROCESSING */
3903 if (cache_ptr->howto == NULL)
3905 (*_bfd_error_handler)
3906 ("%s: illegal relocation type %d at address 0x%lx",
3907 bfd_get_filename (abfd), dst.r_type, (long) dst.r_vaddr);
3908 bfd_set_error (bfd_error_bad_value);
3913 asect->relocation = reloc_cache;
3917 #ifndef coff_rtype_to_howto
3920 /* Get the howto structure for a reloc. This is only used if the file
3921 including this one defines coff_relocate_section to be
3922 _bfd_coff_generic_relocate_section, so it is OK if it does not
3923 always work. It is the responsibility of the including file to
3924 make sure it is reasonable if it is needed. */
3926 static reloc_howto_type *coff_rtype_to_howto
3927 PARAMS ((bfd *, asection *, struct internal_reloc *,
3928 struct coff_link_hash_entry *, struct internal_syment *,
3932 static reloc_howto_type *
3933 coff_rtype_to_howto (abfd, sec, rel, h, sym, addendp)
3936 struct internal_reloc *rel;
3937 struct coff_link_hash_entry *h;
3938 struct internal_syment *sym;
3943 RTYPE2HOWTO (&genrel, rel);
3944 return genrel.howto;
3947 #else /* ! defined (RTYPE2HOWTO) */
3949 #define coff_rtype_to_howto NULL
3951 #endif /* ! defined (RTYPE2HOWTO) */
3952 #endif /* ! defined (coff_rtype_to_howto) */
3954 /* This is stupid. This function should be a boolean predicate. */
3956 coff_canonicalize_reloc (abfd, section, relptr, symbols)
3962 arelent *tblptr = section->relocation;
3963 unsigned int count = 0;
3966 if (section->flags & SEC_CONSTRUCTOR)
3968 /* this section has relocs made up by us, they are not in the
3969 file, so take them out of their chain and place them into
3970 the data area provided */
3971 arelent_chain *chain = section->constructor_chain;
3972 for (count = 0; count < section->reloc_count; count++)
3974 *relptr++ = &chain->relent;
3975 chain = chain->next;
3981 if (! coff_slurp_reloc_table (abfd, section, symbols))
3984 tblptr = section->relocation;
3986 for (; count++ < section->reloc_count;)
3987 *relptr++ = tblptr++;
3992 return section->reloc_count;
3997 coff_sym_filepos (abfd)
4000 return obj_sym_filepos (abfd);
4004 #ifndef coff_reloc16_estimate
4005 #define coff_reloc16_estimate dummy_reloc16_estimate
4007 static int dummy_reloc16_estimate
4008 PARAMS ((bfd *, asection *, arelent *, unsigned int,
4009 struct bfd_link_info *));
4012 dummy_reloc16_estimate (abfd, input_section, reloc, shrink, link_info)
4014 asection *input_section;
4016 unsigned int shrink;
4017 struct bfd_link_info *link_info;
4024 #ifndef coff_reloc16_extra_cases
4026 #define coff_reloc16_extra_cases dummy_reloc16_extra_cases
4028 /* This works even if abort is not declared in any header file. */
4030 static void dummy_reloc16_extra_cases
4031 PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *, arelent *,
4032 bfd_byte *, unsigned int *, unsigned int *));
4035 dummy_reloc16_extra_cases (abfd, link_info, link_order, reloc, data, src_ptr,
4038 struct bfd_link_info *link_info;
4039 struct bfd_link_order *link_order;
4042 unsigned int *src_ptr;
4043 unsigned int *dst_ptr;
4049 /* If coff_relocate_section is defined, we can use the optimized COFF
4050 backend linker. Otherwise we must continue to use the old linker. */
4051 #ifdef coff_relocate_section
4052 #ifndef coff_bfd_link_hash_table_create
4053 #define coff_bfd_link_hash_table_create _bfd_coff_link_hash_table_create
4055 #ifndef coff_bfd_link_add_symbols
4056 #define coff_bfd_link_add_symbols _bfd_coff_link_add_symbols
4058 #ifndef coff_bfd_final_link
4059 #define coff_bfd_final_link _bfd_coff_final_link
4061 #else /* ! defined (coff_relocate_section) */
4062 #define coff_relocate_section NULL
4063 #ifndef coff_bfd_link_hash_table_create
4064 #define coff_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
4066 #ifndef coff_bfd_link_add_symbols
4067 #define coff_bfd_link_add_symbols _bfd_generic_link_add_symbols
4069 #define coff_bfd_final_link _bfd_generic_final_link
4070 #endif /* ! defined (coff_relocate_section) */
4072 #define coff_bfd_link_split_section _bfd_generic_link_split_section
4074 #ifndef coff_start_final_link
4075 #define coff_start_final_link NULL
4078 #ifndef coff_adjust_symndx
4079 #define coff_adjust_symndx NULL
4082 #ifndef coff_link_add_one_symbol
4083 #define coff_link_add_one_symbol _bfd_generic_link_add_one_symbol
4086 #ifndef coff_link_output_has_begun
4087 #define coff_link_output_has_begun _coff_link_output_has_begun
4089 _coff_link_output_has_begun (abfd)
4092 return abfd->output_has_begun;
4096 #ifndef coff_final_link_postscript
4097 #define coff_final_link_postscript _coff_final_link_postscript
4099 _coff_final_link_postscript (abfd, pfinfo)
4101 struct coff_final_link_info * pfinfo;
4107 #ifndef coff_SWAP_aux_in
4108 #define coff_SWAP_aux_in coff_swap_aux_in
4110 #ifndef coff_SWAP_sym_in
4111 #define coff_SWAP_sym_in coff_swap_sym_in
4113 #ifndef coff_SWAP_lineno_in
4114 #define coff_SWAP_lineno_in coff_swap_lineno_in
4116 #ifndef coff_SWAP_aux_out
4117 #define coff_SWAP_aux_out coff_swap_aux_out
4119 #ifndef coff_SWAP_sym_out
4120 #define coff_SWAP_sym_out coff_swap_sym_out
4122 #ifndef coff_SWAP_lineno_out
4123 #define coff_SWAP_lineno_out coff_swap_lineno_out
4125 #ifndef coff_SWAP_reloc_out
4126 #define coff_SWAP_reloc_out coff_swap_reloc_out
4128 #ifndef coff_SWAP_filehdr_out
4129 #define coff_SWAP_filehdr_out coff_swap_filehdr_out
4131 #ifndef coff_SWAP_aouthdr_out
4132 #define coff_SWAP_aouthdr_out coff_swap_aouthdr_out
4134 #ifndef coff_SWAP_scnhdr_out
4135 #define coff_SWAP_scnhdr_out coff_swap_scnhdr_out
4137 #ifndef coff_SWAP_reloc_in
4138 #define coff_SWAP_reloc_in coff_swap_reloc_in
4140 #ifndef coff_SWAP_filehdr_in
4141 #define coff_SWAP_filehdr_in coff_swap_filehdr_in
4143 #ifndef coff_SWAP_aouthdr_in
4144 #define coff_SWAP_aouthdr_in coff_swap_aouthdr_in
4146 #ifndef coff_SWAP_scnhdr_in
4147 #define coff_SWAP_scnhdr_in coff_swap_scnhdr_in
4152 static CONST bfd_coff_backend_data bfd_coff_std_swap_table =
4154 coff_SWAP_aux_in, coff_SWAP_sym_in, coff_SWAP_lineno_in,
4155 coff_SWAP_aux_out, coff_SWAP_sym_out,
4156 coff_SWAP_lineno_out, coff_SWAP_reloc_out,
4157 coff_SWAP_filehdr_out, coff_SWAP_aouthdr_out,
4158 coff_SWAP_scnhdr_out,
4159 FILHSZ, AOUTSZ, SCNHSZ, SYMESZ, AUXESZ, RELSZ, LINESZ,
4160 #ifdef COFF_LONG_FILENAMES
4165 #ifdef COFF_LONG_SECTION_NAMES
4170 COFF_DEFAULT_SECTION_ALIGNMENT_POWER,
4171 coff_SWAP_filehdr_in, coff_SWAP_aouthdr_in, coff_SWAP_scnhdr_in,
4172 coff_SWAP_reloc_in, coff_bad_format_hook, coff_set_arch_mach_hook,
4173 coff_mkobject_hook, styp_to_sec_flags, coff_set_alignment_hook,
4174 coff_slurp_symbol_table, symname_in_debug_hook, coff_pointerize_aux_hook,
4175 coff_print_aux, coff_reloc16_extra_cases, coff_reloc16_estimate,
4176 coff_sym_is_global, coff_compute_section_file_positions,
4177 coff_start_final_link, coff_relocate_section, coff_rtype_to_howto,
4178 coff_adjust_symndx, coff_link_add_one_symbol,
4179 coff_link_output_has_begun, coff_final_link_postscript
4182 #ifndef coff_close_and_cleanup
4183 #define coff_close_and_cleanup _bfd_generic_close_and_cleanup
4186 #ifndef coff_bfd_free_cached_info
4187 #define coff_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
4190 #ifndef coff_get_section_contents
4191 #define coff_get_section_contents _bfd_generic_get_section_contents
4194 #ifndef coff_bfd_copy_private_symbol_data
4195 #define coff_bfd_copy_private_symbol_data _bfd_generic_bfd_copy_private_symbol_data
4198 #ifndef coff_bfd_copy_private_section_data
4199 #define coff_bfd_copy_private_section_data _bfd_generic_bfd_copy_private_section_data
4202 #ifndef coff_bfd_copy_private_bfd_data
4203 #define coff_bfd_copy_private_bfd_data _bfd_generic_bfd_copy_private_bfd_data
4206 #ifndef coff_bfd_merge_private_bfd_data
4207 #define coff_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
4210 #ifndef coff_bfd_set_private_flags
4211 #define coff_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
4214 #ifndef coff_bfd_print_private_bfd_data
4215 #define coff_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data
4218 #ifndef coff_bfd_is_local_label_name
4219 #define coff_bfd_is_local_label_name _bfd_coff_is_local_label_name
4222 #ifndef coff_read_minisymbols
4223 #define coff_read_minisymbols _bfd_generic_read_minisymbols
4226 #ifndef coff_minisymbol_to_symbol
4227 #define coff_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
4230 /* The reloc lookup routine must be supplied by each individual COFF
4232 #ifndef coff_bfd_reloc_type_lookup
4233 #define coff_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
4236 #ifndef coff_bfd_get_relocated_section_contents
4237 #define coff_bfd_get_relocated_section_contents \
4238 bfd_generic_get_relocated_section_contents
4241 #ifndef coff_bfd_relax_section
4242 #define coff_bfd_relax_section bfd_generic_relax_section