1 /* Support for the generic parts of most COFF variants, for BFD.
2 Copyright 1990, 91, 92, 93, 94, 1995 Free Software Foundation, Inc.
3 Written by Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
22 Most of this hacked by Steve Chamberlain,
30 BFD supports a number of different flavours of coff format.
31 The major differences between formats are the sizes and
32 alignments of fields in structures on disk, and the occasional
35 Coff in all its varieties is implemented with a few common
36 files and a number of implementation specific files. For
37 example, The 88k bcs coff format is implemented in the file
38 @file{coff-m88k.c}. This file @code{#include}s
39 @file{coff/m88k.h} which defines the external structure of the
40 coff format for the 88k, and @file{coff/internal.h} which
41 defines the internal structure. @file{coff-m88k.c} also
42 defines the relocations used by the 88k format
45 The Intel i960 processor version of coff is implemented in
46 @file{coff-i960.c}. This file has the same structure as
47 @file{coff-m88k.c}, except that it includes @file{coff/i960.h}
48 rather than @file{coff-m88k.h}.
51 Porting to a new version of coff
53 The recommended method is to select from the existing
54 implementations the version of coff which is most like the one
55 you want to use. For example, we'll say that i386 coff is
56 the one you select, and that your coff flavour is called foo.
57 Copy @file{i386coff.c} to @file{foocoff.c}, copy
58 @file{../include/coff/i386.h} to @file{../include/coff/foo.h},
59 and add the lines to @file{targets.c} and @file{Makefile.in}
60 so that your new back end is used. Alter the shapes of the
61 structures in @file{../include/coff/foo.h} so that they match
62 what you need. You will probably also have to add
63 @code{#ifdef}s to the code in @file{coff/internal.h} and
64 @file{coffcode.h} if your version of coff is too wild.
66 You can verify that your new BFD backend works quite simply by
67 building @file{objdump} from the @file{binutils} directory,
68 and making sure that its version of what's going on and your
69 host system's idea (assuming it has the pretty standard coff
70 dump utility, usually called @code{att-dump} or just
71 @code{dump}) are the same. Then clean up your code, and send
72 what you've done to Cygnus. Then your stuff will be in the
73 next release, and you won't have to keep integrating it.
76 How the coff backend works
81 The Coff backend is split into generic routines that are
82 applicable to any Coff target and routines that are specific
83 to a particular target. The target-specific routines are
84 further split into ones which are basically the same for all
85 Coff targets except that they use the external symbol format
86 or use different values for certain constants.
88 The generic routines are in @file{coffgen.c}. These routines
89 work for any Coff target. They use some hooks into the target
90 specific code; the hooks are in a @code{bfd_coff_backend_data}
91 structure, one of which exists for each target.
93 The essentially similar target-specific routines are in
94 @file{coffcode.h}. This header file includes executable C code.
95 The various Coff targets first include the appropriate Coff
96 header file, make any special defines that are needed, and
97 then include @file{coffcode.h}.
99 Some of the Coff targets then also have additional routines in
100 the target source file itself.
102 For example, @file{coff-i960.c} includes
103 @file{coff/internal.h} and @file{coff/i960.h}. It then
104 defines a few constants, such as @code{I960}, and includes
105 @file{coffcode.h}. Since the i960 has complex relocation
106 types, @file{coff-i960.c} also includes some code to
107 manipulate the i960 relocs. This code is not in
108 @file{coffcode.h} because it would not be used by any other
114 Each flavour of coff supported in BFD has its own header file
115 describing the external layout of the structures. There is also
116 an internal description of the coff layout, in
117 @file{coff/internal.h}. A major function of the
118 coff backend is swapping the bytes and twiddling the bits to
119 translate the external form of the structures into the normal
120 internal form. This is all performed in the
121 @code{bfd_swap}_@i{thing}_@i{direction} routines. Some
122 elements are different sizes between different versions of
123 coff; it is the duty of the coff version specific include file
124 to override the definitions of various packing routines in
125 @file{coffcode.h}. E.g., the size of line number entry in coff is
126 sometimes 16 bits, and sometimes 32 bits. @code{#define}ing
127 @code{PUT_LNSZ_LNNO} and @code{GET_LNSZ_LNNO} will select the
128 correct one. No doubt, some day someone will find a version of
129 coff which has a varying field size not catered to at the
130 moment. To port BFD, that person will have to add more @code{#defines}.
131 Three of the bit twiddling routines are exported to
132 @code{gdb}; @code{coff_swap_aux_in}, @code{coff_swap_sym_in}
133 and @code{coff_swap_linno_in}. @code{GDB} reads the symbol
134 table on its own, but uses BFD to fix things up. More of the
135 bit twiddlers are exported for @code{gas};
136 @code{coff_swap_aux_out}, @code{coff_swap_sym_out},
137 @code{coff_swap_lineno_out}, @code{coff_swap_reloc_out},
138 @code{coff_swap_filehdr_out}, @code{coff_swap_aouthdr_out},
139 @code{coff_swap_scnhdr_out}. @code{Gas} currently keeps track
140 of all the symbol table and reloc drudgery itself, thereby
141 saving the internal BFD overhead, but uses BFD to swap things
142 on the way out, making cross ports much safer. Doing so also
143 allows BFD (and thus the linker) to use the same header files
144 as @code{gas}, which makes one avenue to disaster disappear.
149 The simple canonical form for symbols used by BFD is not rich
150 enough to keep all the information available in a coff symbol
151 table. The back end gets around this problem by keeping the original
152 symbol table around, "behind the scenes".
154 When a symbol table is requested (through a call to
155 @code{bfd_canonicalize_symtab}), a request gets through to
156 @code{coff_get_normalized_symtab}. This reads the symbol table from
157 the coff file and swaps all the structures inside into the
158 internal form. It also fixes up all the pointers in the table
159 (represented in the file by offsets from the first symbol in
160 the table) into physical pointers to elements in the new
161 internal table. This involves some work since the meanings of
162 fields change depending upon context: a field that is a
163 pointer to another structure in the symbol table at one moment
164 may be the size in bytes of a structure at the next. Another
165 pass is made over the table. All symbols which mark file names
166 (<<C_FILE>> symbols) are modified so that the internal
167 string points to the value in the auxent (the real filename)
168 rather than the normal text associated with the symbol
171 At this time the symbol names are moved around. Coff stores
172 all symbols less than nine characters long physically
173 within the symbol table; longer strings are kept at the end of
174 the file in the string table. This pass moves all strings
175 into memory and replaces them with pointers to the strings.
178 The symbol table is massaged once again, this time to create
179 the canonical table used by the BFD application. Each symbol
180 is inspected in turn, and a decision made (using the
181 @code{sclass} field) about the various flags to set in the
182 @code{asymbol}. @xref{Symbols}. The generated canonical table
183 shares strings with the hidden internal symbol table.
185 Any linenumbers are read from the coff file too, and attached
186 to the symbols which own the functions the linenumbers belong to.
191 Writing a symbol to a coff file which didn't come from a coff
192 file will lose any debugging information. The @code{asymbol}
193 structure remembers the BFD from which the symbol was taken, and on
194 output the back end makes sure that the same destination target as
195 source target is present.
197 When the symbols have come from a coff file then all the
198 debugging information is preserved.
200 Symbol tables are provided for writing to the back end in a
201 vector of pointers to pointers. This allows applications like
202 the linker to accumulate and output large symbol tables
203 without having to do too much byte copying.
205 This function runs through the provided symbol table and
206 patches each symbol marked as a file place holder
207 (@code{C_FILE}) to point to the next file place holder in the
208 list. It also marks each @code{offset} field in the list with
209 the offset from the first symbol of the current symbol.
211 Another function of this procedure is to turn the canonical
212 value form of BFD into the form used by coff. Internally, BFD
213 expects symbol values to be offsets from a section base; so a
214 symbol physically at 0x120, but in a section starting at
215 0x100, would have the value 0x20. Coff expects symbols to
216 contain their final value, so symbols have their values
217 changed at this point to reflect their sum with their owning
218 section. This transformation uses the
219 <<output_section>> field of the @code{asymbol}'s
220 @code{asection} @xref{Sections}.
222 o <<coff_mangle_symbols>>
224 This routine runs though the provided symbol table and uses
225 the offsets generated by the previous pass and the pointers
226 generated when the symbol table was read in to create the
227 structured hierachy required by coff. It changes each pointer
228 to a symbol into the index into the symbol table of the asymbol.
230 o <<coff_write_symbols>>
232 This routine runs through the symbol table and patches up the
233 symbols from their internal form into the coff way, calls the
234 bit twiddlers, and writes out the table to the file.
243 The hidden information for an <<asymbol>> is described in a
244 <<combined_entry_type>>:
248 .typedef struct coff_ptr_struct
251 . {* Remembers the offset from the first symbol in the file for
252 . this symbol. Generated by coff_renumber_symbols. *}
253 .unsigned int offset;
255 . {* Should the value of this symbol be renumbered. Used for
256 . XCOFF C_BSTAT symbols. Set by coff_slurp_symbol_table. *}
257 .unsigned int fix_value : 1;
259 . {* Should the tag field of this symbol be renumbered.
260 . Created by coff_pointerize_aux. *}
261 .unsigned int fix_tag : 1;
263 . {* Should the endidx field of this symbol be renumbered.
264 . Created by coff_pointerize_aux. *}
265 .unsigned int fix_end : 1;
267 . {* Should the x_csect.x_scnlen field be renumbered.
268 . Created by coff_slurp_symbol_table. *}
269 .unsigned int fix_scnlen : 1;
271 . {* The container for the symbol structure as read and translated
275 . union internal_auxent auxent;
276 . struct internal_syment syment;
278 .} combined_entry_type;
281 .{* Each canonical asymbol really looks like this: *}
283 .typedef struct coff_symbol_struct
285 . {* The actual symbol which the rest of BFD works with *}
288 . {* A pointer to the hidden information for this symbol *}
289 .combined_entry_type *native;
291 . {* A pointer to the linenumber information for this symbol *}
292 .struct lineno_cache_entry *lineno;
294 . {* Have the line numbers been relocated yet ? *}
295 .boolean done_lineno;
308 bfd_link_pe_info_dval *ptr;
311 if (ptr && ptr->defined)
317 #include "coffswap.h"
319 /* void warning(); */
322 * Return a word with STYP_* (scnhdr.s_flags) flags set to represent the
323 * incoming SEC_* flags. The inverse of this function is styp_to_sec_flags().
324 * NOTE: If you add to/change this routine, you should mirror the changes
325 * in styp_to_sec_flags().
328 sec_to_styp_flags (sec_name, sec_flags)
329 CONST char *sec_name;
334 if (!strcmp (sec_name, _TEXT))
336 styp_flags = STYP_TEXT;
338 else if (!strcmp (sec_name, _DATA))
340 styp_flags = STYP_DATA;
343 else if (!strcmp (sec_name, ".data2"))
345 styp_flags = STYP_DATA;
346 #endif /* TWO_DATA_SECS */
348 else if (!strcmp (sec_name, _BSS))
350 styp_flags = STYP_BSS;
353 else if (!strcmp (sec_name, _COMMENT))
355 styp_flags = STYP_INFO;
356 #endif /* _COMMENT */
359 else if (!strcmp (sec_name, _LIB))
361 styp_flags = STYP_LIB;
365 else if (!strcmp (sec_name, _LIT))
367 styp_flags = STYP_LIT;
370 else if (!strcmp (sec_name, ".debug"))
373 styp_flags = STYP_DEBUG;
375 styp_flags = STYP_INFO;
378 else if (!strncmp (sec_name, ".stab", 5))
380 styp_flags = STYP_INFO;
383 else if (!strcmp (sec_name, ".edata"))
385 styp_flags = STYP_DATA;
388 /* Try and figure out what it should be */
389 else if (sec_flags & SEC_CODE)
391 styp_flags = STYP_TEXT;
393 else if (sec_flags & SEC_DATA)
395 styp_flags = STYP_DATA;
397 else if (sec_flags & SEC_READONLY)
399 #ifdef STYP_LIT /* 29k readonly text/data section */
400 styp_flags = STYP_LIT;
402 styp_flags = STYP_TEXT;
403 #endif /* STYP_LIT */
405 else if (sec_flags & SEC_LOAD)
407 styp_flags = STYP_TEXT;
409 else if (sec_flags & SEC_ALLOC)
411 styp_flags = STYP_BSS;
415 if ((sec_flags & (SEC_NEVER_LOAD | SEC_COFF_SHARED_LIBRARY)) != 0)
416 styp_flags |= STYP_NOLOAD;
422 * Return a word with SEC_* flags set to represent the incoming
423 * STYP_* flags (from scnhdr.s_flags). The inverse of this
424 * function is sec_to_styp_flags().
425 * NOTE: If you add to/change this routine, you should mirror the changes
426 * in sec_to_styp_flags().
429 styp_to_sec_flags (abfd, hdr, name)
434 struct internal_scnhdr *internal_s = (struct internal_scnhdr *) hdr;
435 long styp_flags = internal_s->s_flags;
436 flagword sec_flags = 0;
439 if (styp_flags & STYP_NOLOAD)
441 sec_flags |= SEC_NEVER_LOAD;
443 #endif /* STYP_NOLOAD */
445 /* For 386 COFF, at least, an unloadable text or data section is
446 actually a shared library section. */
447 if (styp_flags & STYP_TEXT)
449 if (sec_flags & SEC_NEVER_LOAD)
450 sec_flags |= SEC_CODE | SEC_COFF_SHARED_LIBRARY;
452 sec_flags |= SEC_CODE | SEC_LOAD | SEC_ALLOC;
454 else if (styp_flags & STYP_DATA)
456 if (sec_flags & SEC_NEVER_LOAD)
457 sec_flags |= SEC_DATA | SEC_COFF_SHARED_LIBRARY;
459 sec_flags |= SEC_DATA | SEC_LOAD | SEC_ALLOC;
461 else if (styp_flags & STYP_BSS)
463 #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
464 if (sec_flags & SEC_NEVER_LOAD)
465 sec_flags |= SEC_ALLOC | SEC_COFF_SHARED_LIBRARY;
468 sec_flags |= SEC_ALLOC;
470 else if (styp_flags & STYP_INFO)
472 /* We mark these as SEC_DEBUGGING, but only if COFF_PAGE_SIZE is
473 defined. coff_compute_section_file_positions uses
474 COFF_PAGE_SIZE to ensure that the low order bits of the
475 section VMA and the file offset match. If we don't know
476 COFF_PAGE_SIZE, we can't ensure the correct correspondence,
477 and demand page loading of the file will fail. */
478 #ifdef COFF_PAGE_SIZE
479 sec_flags |= SEC_DEBUGGING;
482 else if (strcmp (name, _TEXT) == 0)
484 if (sec_flags & SEC_NEVER_LOAD)
485 sec_flags |= SEC_CODE | SEC_COFF_SHARED_LIBRARY;
487 sec_flags |= SEC_CODE | SEC_LOAD | SEC_ALLOC;
489 else if (strcmp (name, _DATA) == 0
491 || strcmp (name, ".data2") == 0
495 if (sec_flags & SEC_NEVER_LOAD)
496 sec_flags |= SEC_DATA | SEC_COFF_SHARED_LIBRARY;
498 sec_flags |= SEC_DATA | SEC_LOAD | SEC_ALLOC;
500 else if (strcmp (name, _BSS) == 0)
502 #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
503 if (sec_flags & SEC_NEVER_LOAD)
504 sec_flags |= SEC_ALLOC | SEC_COFF_SHARED_LIBRARY;
507 sec_flags |= SEC_ALLOC;
509 else if (strcmp (name, ".debug") == 0
511 || strcmp (name, _COMMENT) == 0
513 || strncmp (name, ".stab", 5) == 0)
515 #ifdef COFF_PAGE_SIZE
516 sec_flags |= SEC_DEBUGGING;
520 else if (strcmp (name, _LIB) == 0)
524 else if (strcmp (name, _LIT) == 0)
526 sec_flags = SEC_LOAD | SEC_ALLOC | SEC_READONLY;
531 sec_flags |= SEC_ALLOC | SEC_LOAD;
534 #ifdef STYP_LIT /* A29k readonly text/data section type */
535 if ((styp_flags & STYP_LIT) == STYP_LIT)
537 sec_flags = (SEC_LOAD | SEC_ALLOC | SEC_READONLY);
539 #endif /* STYP_LIT */
540 #ifdef STYP_OTHER_LOAD /* Other loaded sections */
541 if (styp_flags & STYP_OTHER_LOAD)
543 sec_flags = (SEC_LOAD | SEC_ALLOC);
545 #endif /* STYP_SDATA */
550 #define get_index(symbol) ((symbol)->udata.i)
554 bfd_coff_backend_data
558 Special entry points for gdb to swap in coff symbol table parts:
561 . void (*_bfd_coff_swap_aux_in) PARAMS ((
570 . void (*_bfd_coff_swap_sym_in) PARAMS ((
575 . void (*_bfd_coff_swap_lineno_in) PARAMS ((
581 Special entry points for gas to swap out coff parts:
583 . unsigned int (*_bfd_coff_swap_aux_out) PARAMS ((
592 . unsigned int (*_bfd_coff_swap_sym_out) PARAMS ((
597 . unsigned int (*_bfd_coff_swap_lineno_out) PARAMS ((
602 . unsigned int (*_bfd_coff_swap_reloc_out) PARAMS ((
607 . unsigned int (*_bfd_coff_swap_filehdr_out) PARAMS ((
612 . unsigned int (*_bfd_coff_swap_aouthdr_out) PARAMS ((
617 . unsigned int (*_bfd_coff_swap_scnhdr_out) PARAMS ((
623 Special entry points for generic COFF routines to call target
624 dependent COFF routines:
626 . unsigned int _bfd_filhsz;
627 . unsigned int _bfd_aoutsz;
628 . unsigned int _bfd_scnhsz;
629 . unsigned int _bfd_symesz;
630 . unsigned int _bfd_auxesz;
631 . unsigned int _bfd_relsz;
632 . unsigned int _bfd_linesz;
633 . boolean _bfd_coff_long_filenames;
634 . void (*_bfd_coff_swap_filehdr_in) PARAMS ((
638 . void (*_bfd_coff_swap_aouthdr_in) PARAMS ((
642 . void (*_bfd_coff_swap_scnhdr_in) PARAMS ((
646 . void (*_bfd_coff_swap_reloc_in) PARAMS ((
650 . boolean (*_bfd_coff_bad_format_hook) PARAMS ((
652 . PTR internal_filehdr));
653 . boolean (*_bfd_coff_set_arch_mach_hook) PARAMS ((
655 . PTR internal_filehdr));
656 . PTR (*_bfd_coff_mkobject_hook) PARAMS ((
658 . PTR internal_filehdr,
659 . PTR internal_aouthdr));
660 . flagword (*_bfd_styp_to_sec_flags_hook) PARAMS ((
662 . PTR internal_scnhdr,
663 . const char *name));
664 . asection *(*_bfd_make_section_hook) PARAMS ((
667 . void (*_bfd_set_alignment_hook) PARAMS ((
670 . PTR internal_scnhdr));
671 . boolean (*_bfd_coff_slurp_symbol_table) PARAMS ((
673 . boolean (*_bfd_coff_symname_in_debug) PARAMS ((
675 . struct internal_syment *sym));
676 . void (*_bfd_coff_reloc16_extra_cases) PARAMS ((
678 . struct bfd_link_info *link_info,
679 . struct bfd_link_order *link_order,
682 . unsigned int *src_ptr,
683 . unsigned int *dst_ptr));
684 . int (*_bfd_coff_reloc16_estimate) PARAMS ((
686 . asection *input_section,
688 . unsigned int shrink,
689 . struct bfd_link_info *link_info));
690 . boolean (*_bfd_coff_sym_is_global) PARAMS ((
692 . struct internal_syment *));
693 . void (*_bfd_coff_compute_section_file_positions) PARAMS ((
695 . boolean (*_bfd_coff_relocate_section) PARAMS ((
697 . struct bfd_link_info *info,
699 . asection *input_section,
700 . bfd_byte *contents,
701 . struct internal_reloc *relocs,
702 . struct internal_syment *syms,
703 . asection **sections));
704 . reloc_howto_type *(*_bfd_coff_rtype_to_howto) PARAMS ((
707 . struct internal_reloc *rel,
708 . struct coff_link_hash_entry *h,
709 . struct internal_syment *sym,
710 . bfd_vma *addendp));
711 . boolean (*_bfd_coff_adjust_symndx) PARAMS ((
713 . struct bfd_link_info *info,
716 . struct internal_reloc *reloc,
717 . boolean *adjustedp));
719 .} bfd_coff_backend_data;
721 .#define coff_backend_info(abfd) ((bfd_coff_backend_data *) (abfd)->xvec->backend_data)
723 .#define bfd_coff_swap_aux_in(a,e,t,c,ind,num,i) \
724 . ((coff_backend_info (a)->_bfd_coff_swap_aux_in) (a,e,t,c,ind,num,i))
726 .#define bfd_coff_swap_sym_in(a,e,i) \
727 . ((coff_backend_info (a)->_bfd_coff_swap_sym_in) (a,e,i))
729 .#define bfd_coff_swap_lineno_in(a,e,i) \
730 . ((coff_backend_info ( a)->_bfd_coff_swap_lineno_in) (a,e,i))
732 .#define bfd_coff_swap_reloc_out(abfd, i, o) \
733 . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_out) (abfd, i, o))
735 .#define bfd_coff_swap_lineno_out(abfd, i, o) \
736 . ((coff_backend_info (abfd)->_bfd_coff_swap_lineno_out) (abfd, i, o))
738 .#define bfd_coff_swap_aux_out(a,i,t,c,ind,num,o) \
739 . ((coff_backend_info (a)->_bfd_coff_swap_aux_out) (a,i,t,c,ind,num,o))
741 .#define bfd_coff_swap_sym_out(abfd, i,o) \
742 . ((coff_backend_info (abfd)->_bfd_coff_swap_sym_out) (abfd, i, o))
744 .#define bfd_coff_swap_scnhdr_out(abfd, i,o) \
745 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_out) (abfd, i, o))
747 .#define bfd_coff_swap_filehdr_out(abfd, i,o) \
748 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_out) (abfd, i, o))
750 .#define bfd_coff_swap_aouthdr_out(abfd, i,o) \
751 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_out) (abfd, i, o))
753 .#define bfd_coff_filhsz(abfd) (coff_backend_info (abfd)->_bfd_filhsz)
754 .#define bfd_coff_aoutsz(abfd) (coff_backend_info (abfd)->_bfd_aoutsz)
755 .#define bfd_coff_scnhsz(abfd) (coff_backend_info (abfd)->_bfd_scnhsz)
756 .#define bfd_coff_symesz(abfd) (coff_backend_info (abfd)->_bfd_symesz)
757 .#define bfd_coff_auxesz(abfd) (coff_backend_info (abfd)->_bfd_auxesz)
758 .#define bfd_coff_relsz(abfd) (coff_backend_info (abfd)->_bfd_relsz)
759 .#define bfd_coff_linesz(abfd) (coff_backend_info (abfd)->_bfd_linesz)
760 .#define bfd_coff_long_filenames(abfd) (coff_backend_info (abfd)->_bfd_coff_long_filenames)
761 .#define bfd_coff_swap_filehdr_in(abfd, i,o) \
762 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_in) (abfd, i, o))
764 .#define bfd_coff_swap_aouthdr_in(abfd, i,o) \
765 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_in) (abfd, i, o))
767 .#define bfd_coff_swap_scnhdr_in(abfd, i,o) \
768 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_in) (abfd, i, o))
770 .#define bfd_coff_swap_reloc_in(abfd, i, o) \
771 . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_in) (abfd, i, o))
773 .#define bfd_coff_bad_format_hook(abfd, filehdr) \
774 . ((coff_backend_info (abfd)->_bfd_coff_bad_format_hook) (abfd, filehdr))
776 .#define bfd_coff_set_arch_mach_hook(abfd, filehdr)\
777 . ((coff_backend_info (abfd)->_bfd_coff_set_arch_mach_hook) (abfd, filehdr))
778 .#define bfd_coff_mkobject_hook(abfd, filehdr, aouthdr)\
779 . ((coff_backend_info (abfd)->_bfd_coff_mkobject_hook) (abfd, filehdr, aouthdr))
781 .#define bfd_coff_styp_to_sec_flags_hook(abfd, scnhdr, name)\
782 . ((coff_backend_info (abfd)->_bfd_styp_to_sec_flags_hook) (abfd, scnhdr, name))
784 .#define bfd_coff_make_section_hook(abfd, name)\
785 . ((coff_backend_info (abfd)->_bfd_make_section_hook) (abfd, name))
787 .#define bfd_coff_set_alignment_hook(abfd, sec, scnhdr)\
788 . ((coff_backend_info (abfd)->_bfd_set_alignment_hook) (abfd, sec, scnhdr))
790 .#define bfd_coff_slurp_symbol_table(abfd)\
791 . ((coff_backend_info (abfd)->_bfd_coff_slurp_symbol_table) (abfd))
793 .#define bfd_coff_symname_in_debug(abfd, sym)\
794 . ((coff_backend_info (abfd)->_bfd_coff_symname_in_debug) (abfd, sym))
796 .#define bfd_coff_reloc16_extra_cases(abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr)\
797 . ((coff_backend_info (abfd)->_bfd_coff_reloc16_extra_cases)\
798 . (abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr))
800 .#define bfd_coff_reloc16_estimate(abfd, section, reloc, shrink, link_info)\
801 . ((coff_backend_info (abfd)->_bfd_coff_reloc16_estimate)\
802 . (abfd, section, reloc, shrink, link_info))
804 .#define bfd_coff_sym_is_global(abfd, sym)\
805 . ((coff_backend_info (abfd)->_bfd_coff_sym_is_global)\
808 .#define bfd_coff_compute_section_file_positions(abfd)\
809 . ((coff_backend_info (abfd)->_bfd_coff_compute_section_file_positions)\
812 .#define bfd_coff_relocate_section(obfd,info,ibfd,o,con,rel,isyms,secs)\
813 . ((coff_backend_info (ibfd)->_bfd_coff_relocate_section)\
814 . (obfd, info, ibfd, o, con, rel, isyms, secs))
815 .#define bfd_coff_rtype_to_howto(abfd, sec, rel, h, sym, addendp)\
816 . ((coff_backend_info (abfd)->_bfd_coff_rtype_to_howto)\
817 . (abfd, sec, rel, h, sym, addendp))
818 .#define bfd_coff_adjust_symndx(obfd, info, ibfd, sec, rel, adjustedp)\
819 . ((coff_backend_info (abfd)->_bfd_coff_adjust_symndx)\
820 . (obfd, info, ibfd, sec, rel, adjustedp))
824 /* See whether the magic number matches. */
827 coff_bad_format_hook (abfd, filehdr)
831 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
833 if (BADMAG (*internal_f))
836 /* if the optional header is NULL or not the correct size then
837 quit; the only difference I can see between m88k dgux headers (MC88DMAGIC)
838 and Intel 960 readwrite headers (I960WRMAGIC) is that the
839 optional header is of a different size.
841 But the mips keeps extra stuff in it's opthdr, so dont check
845 #if defined(M88) || defined(I960)
846 if (internal_f->f_opthdr != 0 && AOUTSZ != internal_f->f_opthdr)
854 coff_make_section_hook (abfd, name)
859 /* FIXME: This predates the call to bfd_make_section_anyway
860 in make_a_section_from_file, and can probably go away. */
861 /* On SCO a file created by the Microsoft assembler can have two
862 .data sections. We use .data2 for the second one. */
863 if (strcmp (name, _DATA) == 0)
864 return bfd_make_section (abfd, ".data2");
866 return (asection *) NULL;
870 initialize a section structure with information peculiar to this
871 particular implementation of coff
875 coff_new_section_hook (abfd, section)
879 section->alignment_power = COFF_DEFAULT_SECTION_ALIGNMENT_POWER;
881 /* Allocate aux records for section symbols, to store size and
884 @@ Shouldn't use constant multiplier here! */
885 coffsymbol (section->symbol)->native =
886 (combined_entry_type *) bfd_zalloc (abfd,
887 sizeof (combined_entry_type) * 10);
889 /* The .stab section must be aligned to 2**2 at most, because
890 otherwise there may be gaps in the section which gdb will not
891 know how to interpret. Examining the section name is a hack, but
892 that is also how gdb locates the section. We also align the
893 .stabstr section this way for backward compatibility, although I
894 believe it would work anyhow. */
895 if (COFF_DEFAULT_SECTION_ALIGNMENT_POWER > 2
896 && (strncmp (section->name, ".stab", 5) == 0))
897 section->alignment_power = 2;
904 /* Set the alignment of a BFD section. */
907 coff_set_alignment_hook (abfd, section, scnhdr)
912 struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr;
915 for (i = 0; i < 32; i++)
916 if ((1 << i) >= hdr->s_align)
918 section->alignment_power = i;
923 #define coff_set_alignment_hook \
924 ((void (*) PARAMS ((bfd *, asection *, PTR))) bfd_void)
932 coff_data_type *coff;
934 abfd->tdata.coff_obj_data = (struct coff_tdata *) bfd_zalloc (abfd, sizeof (coff_data_type));
935 if (abfd->tdata.coff_obj_data == 0)
937 bfd_set_error (bfd_error_no_memory);
940 coff = coff_data (abfd);
941 coff->symbols = (coff_symbol_type *) NULL;
942 coff->conversion_table = (unsigned int *) NULL;
943 coff->raw_syments = (struct coff_ptr_struct *) NULL;
945 /* make_abs_section(abfd);*/
953 /* Create the COFF backend specific information. */
956 coff_mkobject_hook (abfd, filehdr, aouthdr)
961 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
962 coff_data_type *coff;
964 if (coff_mkobject (abfd) == false)
967 coff = coff_data (abfd);
969 coff->sym_filepos = internal_f->f_symptr;
971 /* These members communicate important constants about the symbol
972 table to GDB's symbol-reading code. These `constants'
973 unfortunately vary among coff implementations... */
974 coff->local_n_btmask = N_BTMASK;
975 coff->local_n_btshft = N_BTSHFT;
976 coff->local_n_tmask = N_TMASK;
977 coff->local_n_tshift = N_TSHIFT;
978 coff->local_symesz = SYMESZ;
979 coff->local_auxesz = AUXESZ;
980 coff->local_linesz = LINESZ;
982 obj_raw_syment_count (abfd) =
983 obj_conv_table_size (abfd) =
989 /* Determine the machine architecture and type. FIXME: This is target
990 dependent because the magic numbers are defined in the target
991 dependent header files. But there is no particular need for this.
992 If the magic numbers were moved to a separate file, this function
993 would be target independent and would also be much more successful
994 at linking together COFF files for different architectures. */
997 coff_set_arch_mach_hook (abfd, filehdr)
1002 enum bfd_architecture arch;
1003 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
1006 switch (internal_f->f_magic)
1011 case I386AIXMAGIC: /* Danbury PS/2 AIX C Compiler */
1012 case LYNXCOFFMAGIC: /* shadows the m68k Lynx number below, sigh */
1013 arch = bfd_arch_i386;
1017 #ifdef A29K_MAGIC_BIG
1018 case A29K_MAGIC_BIG:
1019 case A29K_MAGIC_LITTLE:
1020 arch = bfd_arch_a29k;
1026 arch = bfd_arch_arm;
1033 #ifdef MC68KBCSMAGIC
1036 #ifdef APOLLOM68KMAGIC
1037 case APOLLOM68KMAGIC:
1039 #ifdef LYNXCOFFMAGIC
1042 arch = bfd_arch_m68k;
1050 arch = bfd_arch_m88k;
1056 arch = bfd_arch_z8k;
1057 switch (internal_f->f_flags & F_MACHMASK)
1060 machine = bfd_mach_z8001;
1063 machine = bfd_mach_z8002;
1074 arch = bfd_arch_i960;
1075 switch (F_I960TYPE & internal_f->f_flags)
1079 machine = bfd_mach_i960_core;
1082 machine = bfd_mach_i960_kb_sb;
1085 machine = bfd_mach_i960_mc;
1088 machine = bfd_mach_i960_xa;
1091 machine = bfd_mach_i960_ca;
1094 machine = bfd_mach_i960_ka_sa;
1096 /* start-sanitize-i960xl */
1098 machine = bfd_mach_i960_xl;
1100 /* end-sanitize-i960xl */
1110 arch = bfd_arch_rs6000;
1117 arch = bfd_arch_we32k;
1124 arch = bfd_arch_h8300;
1125 machine = bfd_mach_h8300;
1126 /* !! FIXME this probably isn't the right place for this */
1127 abfd->flags |= BFD_IS_RELAXABLE;
1133 arch = bfd_arch_h8300;
1134 machine = bfd_mach_h8300h;
1135 /* !! FIXME this probably isn't the right place for this */
1136 abfd->flags |= BFD_IS_RELAXABLE;
1140 #ifdef SH_ARCH_MAGIC_BIG
1141 case SH_ARCH_MAGIC_BIG:
1142 case SH_ARCH_MAGIC_LITTLE:
1150 arch = bfd_arch_h8500;
1157 #ifdef LYNXCOFFMAGIC
1160 arch = bfd_arch_sparc;
1165 default: /* Unreadable input file type */
1166 arch = bfd_arch_obscure;
1170 bfd_default_set_arch_mach (abfd, arch, machine);
1174 #ifdef SYMNAME_IN_DEBUG
1177 symname_in_debug_hook (abfd, sym)
1179 struct internal_syment *sym;
1181 return SYMNAME_IN_DEBUG (sym) ? true : false;
1186 #define symname_in_debug_hook \
1187 (boolean (*) PARAMS ((bfd *, struct internal_syment *))) bfd_false
1195 To write relocations, the back end steps though the
1196 canonical relocation table and create an
1197 @code{internal_reloc}. The symbol index to use is removed from
1198 the @code{offset} field in the symbol table supplied. The
1199 address comes directly from the sum of the section base
1200 address and the relocation offset; the type is dug directly
1201 from the howto field. Then the @code{internal_reloc} is
1202 swapped into the shape of an @code{external_reloc} and written
1208 coff_write_relocs (abfd, first_undef)
1213 for (s = abfd->sections; s != (asection *) NULL; s = s->next)
1216 struct external_reloc dst;
1218 arelent **p = s->orelocation;
1219 if (bfd_seek (abfd, s->rel_filepos, SEEK_SET) != 0)
1221 for (i = 0; i < s->reloc_count; i++)
1223 struct internal_reloc n;
1225 memset ((PTR) & n, 0, sizeof (n));
1227 /* Now we've renumbered the symbols we know where the
1228 undefined symbols live in the table. Check the reloc
1229 entries for symbols who's output bfd isn't the right one.
1230 This is because the symbol was undefined (which means
1231 that all the pointers are never made to point to the same
1232 place). This is a bad thing,'cause the symbols attached
1233 to the output bfd are indexed, so that the relocation
1234 entries know which symbol index they point to. So we
1235 have to look up the output symbol here. */
1237 if (q->sym_ptr_ptr[0]->the_bfd != abfd)
1240 const char *sname = q->sym_ptr_ptr[0]->name;
1241 asymbol **outsyms = abfd->outsymbols;
1242 for (i = first_undef; outsyms[i]; i++)
1244 const char *intable = outsyms[i]->name;
1245 if (strcmp (intable, sname) == 0) {
1246 /* got a hit, so repoint the reloc */
1247 q->sym_ptr_ptr = outsyms + i;
1253 n.r_vaddr = q->address + s->vma;
1256 /* The 29k const/consth reloc pair is a real kludge. The consth
1257 part doesn't have a symbol; it has an offset. So rebuilt
1259 if (q->howto->type == R_IHCONST)
1260 n.r_symndx = q->addend;
1265 if (q->sym_ptr_ptr == bfd_abs_section_ptr->symbol_ptr_ptr)
1266 /* This is a relocation relative to the absolute symbol. */
1270 n.r_symndx = get_index ((*(q->sym_ptr_ptr)));
1271 /* Take notice if the symbol reloc points to a symbol
1272 we don't have in our symbol table. What should we
1274 if (n.r_symndx > obj_conv_table_size (abfd))
1279 #ifdef SWAP_OUT_RELOC_OFFSET
1280 n.r_offset = q->addend;
1284 /* Work out reloc type from what is required */
1285 SELECT_RELOC (n, q->howto);
1287 n.r_type = q->howto->type;
1289 coff_swap_reloc_out (abfd, &n, &dst);
1290 if (bfd_write ((PTR) & dst, 1, RELSZ, abfd) != RELSZ)
1298 /* Set flags and magic number of a coff file from architecture and machine
1299 type. Result is true if we can represent the arch&type, false if not. */
1302 coff_set_flags (abfd, magicp, flagsp)
1305 unsigned short *flagsp;
1307 switch (bfd_get_arch (abfd))
1312 switch (bfd_get_mach (abfd))
1314 case bfd_mach_z8001:
1317 case bfd_mach_z8002:
1331 *magicp = I960ROMAGIC;
1333 ((bfd_get_file_flags(abfd) & WP_TEXT) ? I960ROMAGIC :
1334 I960RWMAGIC); FIXME???
1336 switch (bfd_get_mach (abfd))
1338 case bfd_mach_i960_core:
1341 case bfd_mach_i960_kb_sb:
1344 case bfd_mach_i960_mc:
1347 case bfd_mach_i960_xa:
1350 case bfd_mach_i960_ca:
1353 case bfd_mach_i960_ka_sa:
1356 /* start-sanitize-i960xl */
1357 case bfd_mach_i960_xl:
1360 /* end-sanitize-i960xl */
1376 *magicp = I386MAGIC;
1378 /* Just overwrite the usual value if we're doing Lynx. */
1379 *magicp = LYNXCOFFMAGIC;
1386 #ifdef APOLLOM68KMAGIC
1387 *magicp = APOLLO_COFF_VERSION_NUMBER;
1389 *magicp = MC68MAGIC;
1392 /* Just overwrite the usual value if we're doing Lynx. */
1393 *magicp = LYNXCOFFMAGIC;
1401 *magicp = MC88OMAGIC;
1406 case bfd_arch_h8300:
1407 switch (bfd_get_mach (abfd))
1409 case bfd_mach_h8300:
1410 *magicp = H8300MAGIC;
1412 case bfd_mach_h8300h:
1413 *magicp = H8300HMAGIC;
1419 #ifdef SH_ARCH_MAGIC_BIG
1421 if (abfd->xvec->byteorder_big_p)
1422 *magicp = SH_ARCH_MAGIC_BIG;
1424 *magicp = SH_ARCH_MAGIC_LITTLE;
1430 case bfd_arch_sparc:
1431 *magicp = SPARCMAGIC;
1433 /* Just overwrite the usual value if we're doing Lynx. */
1434 *magicp = LYNXCOFFMAGIC;
1441 case bfd_arch_h8500:
1442 *magicp = H8500MAGIC;
1446 #ifdef A29K_MAGIC_BIG
1448 if (abfd->xvec->byteorder_big_p)
1449 *magicp = A29K_MAGIC_BIG;
1451 *magicp = A29K_MAGIC_LITTLE;
1457 case bfd_arch_we32k:
1458 *magicp = WE32KMAGIC;
1464 case bfd_arch_rs6000:
1465 case bfd_arch_powerpc:
1466 *magicp = U802TOCMAGIC;
1471 default: /* Unknown architecture */
1472 /* return false; -- fall through to "return false" below, to avoid
1473 "statement never reached" errors on the one below. */
1482 coff_set_arch_mach (abfd, arch, machine)
1484 enum bfd_architecture arch;
1485 unsigned long machine;
1488 unsigned short dummy2;
1490 if (! bfd_default_set_arch_mach (abfd, arch, machine))
1493 if (arch != bfd_arch_unknown &&
1494 coff_set_flags (abfd, &dummy1, &dummy2) != true)
1495 return false; /* We can't represent this type */
1497 return true; /* We're easy ... */
1501 /* Calculate the file position for each section. */
1504 coff_compute_section_file_positions (abfd)
1508 asection *previous = (asection *) NULL;
1509 file_ptr sofar = FILHSZ;
1517 #ifdef COFF_IMAGE_WITH_PE
1519 if (coff_data (abfd)->link_info)
1521 page_size = pe_value (&(coff_data (abfd)->link_info->pe_info->file_alignment),
1522 PE_DEF_FILE_ALIGNMENT);
1525 page_size = PE_DEF_FILE_ALIGNMENT;
1526 #elif defined (COFF_PAGE_SIZE)
1527 int page_size = COFF_PAGE_SIZE;
1530 if (bfd_get_start_address (abfd))
1532 /* A start address may have been added to the original file. In this
1533 case it will need an optional header to record it. */
1534 abfd->flags |= EXEC_P;
1537 if (abfd->flags & EXEC_P)
1540 sofar += abfd->section_count * SCNHSZ;
1541 for (current = abfd->sections, count = 1;
1542 current != (asection *) NULL;
1543 current = current->next, ++count)
1545 current->target_index = count;
1547 /* Only deal with sections which have contents */
1548 if (!(current->flags & SEC_HAS_CONTENTS))
1552 /* Do not include the .junk section. This is where we collect section
1553 data which we don't need. This is mainly the MS .debug$ data which
1554 stores codeview debug data. */
1555 if (strcmp (current->name, ".junk") == 0)
1561 /* Align the sections in the file to the same boundary on
1562 which they are aligned in virtual memory. I960 doesn't
1563 do this (FIXME) so we can stay in sync with Intel. 960
1564 doesn't yet page from files... */
1567 /* make sure this section is aligned on the right boundary - by
1568 padding the previous section up if necessary */
1571 sofar = BFD_ALIGN (sofar, 1 << current->alignment_power);
1572 if (previous != (asection *) NULL)
1574 previous->_raw_size += sofar - old_sofar;
1580 /* In demand paged files the low order bits of the file offset
1581 must match the low order bits of the virtual address. */
1582 #ifdef COFF_PAGE_SIZE
1583 if ((abfd->flags & D_PAGED) != 0
1584 && (current->flags & SEC_ALLOC) != 0)
1585 sofar += (current->vma - sofar) % page_size;
1588 current->filepos = sofar;
1590 sofar += current->_raw_size;
1592 /* make sure that this section is of the right size too */
1594 sofar = BFD_ALIGN (sofar, 1 << current->alignment_power);
1595 current->_raw_size += sofar - old_sofar;
1599 /* Force .lib sections to start at zero. The vma is then
1600 incremented in coff_set_section_contents. This is right for
1602 if (strcmp (current->name, _LIB) == 0)
1603 bfd_set_section_vma (abfd, current, 0);
1608 #ifdef COFF_IMAGE_WITH_PE
1609 /* Normally, the starting location for the symbol table will be at the end
1610 of the last section. However, when dealing with NT, the last section
1611 must be as long as its size rounded up to the next page (0x1000). */
1612 sofar = (sofar + page_size - 1) & -page_size;
1615 previous->_raw_size = (previous->_raw_size + page_size -1) & -page_size;
1618 obj_relocbase (abfd) = sofar;
1619 abfd->output_has_begun = true;
1623 #ifndef RS6000COFF_C
1625 /* If .file, .text, .data, .bss symbols are missing, add them. */
1626 /* @@ Should we only be adding missing symbols, or overriding the aux
1627 values for existing section symbols? */
1629 coff_add_missing_symbols (abfd)
1632 unsigned int nsyms = bfd_get_symcount (abfd);
1633 asymbol **sympp = abfd->outsymbols;
1636 int need_text = 1, need_data = 1, need_bss = 1, need_file = 1;
1638 for (i = 0; i < nsyms; i++)
1640 coff_symbol_type *csym = coff_symbol_from (abfd, sympp[i]);
1644 /* only do this if there is a coff representation of the input
1646 if (csym->native && csym->native->u.syment.n_sclass == C_FILE)
1651 name = csym->symbol.name;
1654 if (!strcmp (name, _TEXT))
1657 else if (!strcmp (name, ".wtext"))
1660 else if (!strcmp (name, _DATA))
1662 else if (!strcmp (name, _BSS))
1666 /* Now i == bfd_get_symcount (abfd). */
1667 /* @@ For now, don't deal with .file symbol. */
1670 if (!need_text && !need_data && !need_bss && !need_file)
1672 nsyms += need_text + need_data + need_bss + need_file;
1673 sympp2 = (asymbol **) bfd_alloc_by_size_t (abfd, nsyms * sizeof (asymbol *));
1676 bfd_set_error (bfd_error_no_memory);
1679 memcpy (sympp2, sympp, i * sizeof (asymbol *));
1682 /* @@ Generate fake .file symbol, in sympp2[i], and increment i. */
1686 sympp2[i++] = coff_section_symbol (abfd, _TEXT);
1688 sympp2[i++] = coff_section_symbol (abfd, _DATA);
1690 sympp2[i++] = coff_section_symbol (abfd, _BSS);
1691 BFD_ASSERT (i == nsyms);
1692 bfd_set_symtab (abfd, sympp2, nsyms);
1696 #endif /* ! defined (RS6000COFF_C) */
1699 static void add_data_entry (abfd, aout, idx, name, base)
1701 struct internal_aouthdr *aout;
1706 asection *sec = bfd_get_section_by_name (abfd, name);
1708 /* add import directory information if it exists */
1711 aout->pe->DataDirectory[idx].VirtualAddress = sec->lma - base;
1712 aout->pe->DataDirectory[idx].Size = sec->_raw_size;
1713 sec->flags |= SEC_DATA;
1719 fill_pe_header_info (abfd, internal_f, internal_a)
1721 struct internal_filehdr *internal_f;
1722 struct internal_aouthdr *internal_a;
1724 /* assign other filehdr fields for DOS header and NT signature */
1729 bfd_link_pe_info *pe_info = coff_data (abfd)->link_info->pe_info;
1731 internal_f->f_timdat = time (0);
1733 if (pe_value (&pe_info->dll, 0))
1734 internal_f->f_flags |= F_DLL ;
1737 if (bfd_get_section_by_name (abfd, ".reloc"))
1738 internal_f->f_flags &= ~F_RELFLG;
1741 memset (internal_f->pe, 0, sizeof (struct internal_extra_pe_filehdr));
1742 memset (internal_a->pe, 0, sizeof (struct internal_extra_pe_aouthdr));
1745 ib = internal_a->pe->ImageBase = pe_value (&pe_info->image_base, NT_EXE_IMAGE_BASE);
1747 if (internal_a->tsize)
1748 internal_a->text_start -= ib;
1749 if (internal_a->dsize)
1750 internal_a->data_start -= ib;
1751 if (internal_a->entry)
1752 internal_a->entry -= ib;
1755 sa = internal_a->pe->SectionAlignment = pe_value (&pe_info->section_alignment,
1756 NT_SECTION_ALIGNMENT);
1758 fa = internal_a->pe->FileAlignment = pe_value (&pe_info->file_alignment,
1761 #define FA(x) (((x) + fa -1 ) & (- fa))
1762 #define SA(x) (((x) + sa -1 ) & (- sa))
1764 /* We like to have the sizes aligned */
1766 internal_a->bsize = FA (internal_a->bsize);
1768 internal_f->pe->e_magic = DOSMAGIC;
1769 internal_f->pe->e_cblp = 0x90;
1770 internal_f->pe->e_cp = 0x3;
1771 internal_f->pe->e_crlc = 0x0;
1772 internal_f->pe->e_cparhdr = 0x4;
1773 internal_f->pe->e_minalloc = 0x0;
1774 internal_f->pe->e_maxalloc = 0xffff;
1775 internal_f->pe->e_ss = 0x0;
1776 internal_f->pe->e_sp = 0xb8;
1777 internal_f->pe->e_csum = 0x0;
1778 internal_f->pe->e_ip = 0x0;
1779 internal_f->pe->e_cs = 0x0;
1780 internal_f->pe->e_lfarlc = 0x40;
1781 internal_f->pe->e_ovno = 0x0;
1784 for (idx=0; idx < 4; idx++)
1785 internal_f->pe->e_res[idx] = 0x0;
1787 internal_f->pe->e_oemid = 0x0;
1788 internal_f->pe->e_oeminfo = 0x0;
1791 for (idx=0; idx < 10; idx++)
1792 internal_f->pe->e_res2[idx] = 0x0;
1794 internal_f->pe->e_lfanew = 0x80;
1796 /* this next collection of data are mostly just characters. It appears
1797 to be constant within the headers put on NT exes */
1798 internal_f->pe->dos_message[0] = 0x0eba1f0e;
1799 internal_f->pe->dos_message[1] = 0xcd09b400;
1800 internal_f->pe->dos_message[2] = 0x4c01b821;
1801 internal_f->pe->dos_message[3] = 0x685421cd;
1802 internal_f->pe->dos_message[4] = 0x70207369;
1803 internal_f->pe->dos_message[5] = 0x72676f72;
1804 internal_f->pe->dos_message[6] = 0x63206d61;
1805 internal_f->pe->dos_message[7] = 0x6f6e6e61;
1806 internal_f->pe->dos_message[8] = 0x65622074;
1807 internal_f->pe->dos_message[9] = 0x6e757220;
1808 internal_f->pe->dos_message[10] = 0x206e6920;
1809 internal_f->pe->dos_message[11] = 0x20534f44;
1810 internal_f->pe->dos_message[12] = 0x65646f6d;
1811 internal_f->pe->dos_message[13] = 0x0a0d0d2e;
1812 internal_f->pe->dos_message[14] = 0x24;
1813 internal_f->pe->dos_message[15] = 0x0;
1814 internal_f->pe->nt_signature = NT_SIGNATURE;
1817 /* write all of the other optional header data */
1819 internal_a->pe->MajorOperatingSystemVersion =
1820 pe_value (&pe_info->major_os_version, 1);
1822 internal_a->pe->MinorOperatingSystemVersion =
1823 pe_value (&pe_info->minor_os_version, 0);
1825 internal_a->pe->MajorImageVersion =
1826 pe_value (&pe_info->major_image_version, 1);
1828 internal_a->pe->MinorImageVersion =
1829 pe_value (&pe_info->minor_image_version, 0);
1832 internal_a->pe->MajorSubsystemVersion =
1833 pe_value (&pe_info->major_subsystem_version, 3);
1836 internal_a->pe->MinorSubsystemVersion =
1837 pe_value (&pe_info->minor_subsystem_version, 10);
1839 internal_a->pe->Subsystem =
1840 pe_value (&pe_info->subsystem, BFD_PE_CONSOLE);
1842 /* Virtual start address, take virtual start address of last section,
1843 add its physical size and round up the next page (NT_SECTION_ALIGNMENT).
1844 An assumption has been made that the sections stored in the abfd
1845 structure are in order and that I have successfully saved the last
1846 section's address and size. */
1848 /* The headers go up to where the first section starts. */
1850 internal_a->pe->SizeOfHeaders = abfd->sections->filepos;
1851 internal_a->pe->CheckSum = 0;
1852 internal_a->pe->DllCharacteristics = 0;
1854 internal_a->pe->SizeOfStackReserve = pe_value (&pe_info->stack_reserve,
1856 internal_a->pe->SizeOfStackCommit = pe_value (&pe_info->stack_commit,
1859 internal_a->pe->SizeOfHeapReserve = pe_value (&pe_info->heap_reserve,
1861 internal_a->pe->SizeOfHeapCommit = pe_value (&pe_info->heap_commit,
1864 internal_a->pe->LoaderFlags = 0;
1865 internal_a->pe->NumberOfRvaAndSizes = IMAGE_NUMBEROF_DIRECTORY_ENTRIES; /* 0x10 */
1867 /* first null out all data directory entries .. */
1868 memset (internal_a->pe->DataDirectory, sizeof (internal_a->pe->DataDirectory), 0);
1870 add_data_entry (abfd, internal_a, 0, ".edata", ib);
1871 add_data_entry (abfd, internal_a, 1, ".idata", ib);
1872 add_data_entry (abfd, internal_a, 2, ".rsrc" ,ib);
1873 add_data_entry (abfd, internal_a, 5, ".reloc", ib);
1877 bfd_vma isize = SA(abfd->sections->filepos);
1879 for (sec = abfd->sections; sec; sec = sec->next)
1881 int rounded = FA(sec->_raw_size);
1882 if (sec->flags & SEC_DATA)
1884 if (sec->flags & SEC_CODE)
1886 isize += SA(rounded);
1889 internal_a->dsize = dsize;
1890 internal_a->tsize = tsize;
1891 internal_a->pe->SizeOfImage = isize;
1900 coff_write_object_contents (abfd)
1904 boolean hasrelocs = false;
1905 boolean haslinno = false;
1906 file_ptr reloc_base;
1907 file_ptr lineno_base;
1909 unsigned long reloc_size = 0;
1910 unsigned long lnno_size = 0;
1911 asection *text_sec = NULL;
1912 asection *data_sec = NULL;
1913 asection *bss_sec = NULL;
1915 struct internal_filehdr internal_f;
1916 struct internal_aouthdr internal_a;
1918 #ifdef COFF_IMAGE_WITH_PE
1919 struct internal_extra_pe_aouthdr extra_a;
1920 struct internal_extra_pe_filehdr extra_f;
1921 bfd_link_pe_info defs;
1922 struct bfd_link_info dummy_info;
1923 struct bfd_link_info *info ;
1924 struct bfd_link_pe_info *pe_info;
1926 if (coff_data (abfd)->link_info)
1927 info =coff_data (abfd)->link_info;
1930 coff_data (abfd)->link_info = info = &dummy_info;
1933 pe_info = (struct bfd_link_pe_info *)(info->pe_info);
1937 /* Just use sensible defaults */
1938 memset (&defs, 0, sizeof (defs));
1939 coff_data (abfd)->link_info->pe_info = &defs;
1943 bfd_set_error (bfd_error_system_call);
1945 if (abfd->output_has_begun == false)
1946 coff_compute_section_file_positions (abfd);
1948 reloc_base = obj_relocbase (abfd);
1950 /* Make a pass through the symbol table to count line number entries and
1951 put them into the correct asections */
1953 lnno_size = coff_count_linenumbers (abfd) * LINESZ;
1955 /* Work out the size of the reloc and linno areas */
1957 for (current = abfd->sections; current != NULL; current =
1959 reloc_size += current->reloc_count * RELSZ;
1961 lineno_base = reloc_base + reloc_size;
1962 sym_base = lineno_base + lnno_size;
1964 /* Indicate in each section->line_filepos its actual file address */
1965 for (current = abfd->sections; current != NULL; current =
1968 if (current->lineno_count)
1970 current->line_filepos = lineno_base;
1971 current->moving_line_filepos = lineno_base;
1972 lineno_base += current->lineno_count * LINESZ;
1976 current->line_filepos = 0;
1978 if (current->reloc_count)
1980 current->rel_filepos = reloc_base;
1981 reloc_base += current->reloc_count * RELSZ;
1985 current->rel_filepos = 0;
1989 /* Write section headers to the file. */
1990 internal_f.f_nscns = 0;
1993 (file_ptr) ((abfd->flags & EXEC_P) ?
1994 (FILHSZ + AOUTSZ) : FILHSZ),
1998 for (current = abfd->sections;
2000 current = current->next)
2002 struct internal_scnhdr section;
2005 /* Do not include the .junk section. This is where we collect section
2006 data which we don't need. This is mainly the MS .debug$ data which
2007 stores codeview debug data. */
2008 if (strcmp (current->name, ".junk") == 0)
2013 internal_f.f_nscns++;
2014 strncpy (&(section.s_name[0]), current->name, 8);
2016 /* Always set s_vaddr of .lib to 0. This is right for SVR3.2
2017 Ian Taylor <ian@cygnus.com>. */
2018 if (strcmp (current->name, _LIB) == 0)
2019 section.s_vaddr = 0;
2022 section.s_vaddr = current->lma;
2023 section.s_paddr = current->lma;
2024 section.s_size = current->_raw_size;
2027 If this section has no size or is unloadable then the scnptr
2030 if (current->_raw_size == 0 ||
2031 (current->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
2033 section.s_scnptr = 0;
2037 section.s_scnptr = current->filepos;
2039 section.s_relptr = current->rel_filepos;
2040 section.s_lnnoptr = current->line_filepos;
2041 section.s_nreloc = current->reloc_count;
2042 section.s_nlnno = current->lineno_count;
2043 if (current->reloc_count != 0)
2045 if (current->lineno_count != 0)
2048 section.s_flags = sec_to_styp_flags (current->name, current->flags);
2050 if (!strcmp (current->name, _TEXT))
2054 else if (!strcmp (current->name, _DATA))
2057 #ifdef TWO_DATA_SECS
2059 else if (!strcmp (current->name, ".data2"))
2062 #endif /* TWO_DATA_SECS */
2064 else if (!strcmp (current->name, _BSS))
2070 section.s_align = (current->alignment_power
2071 ? 1 << current->alignment_power
2076 #ifdef COFF_IMAGE_WITH_PE
2077 /* suppress output of the sections if they are null. ld includes
2078 the bss and data sections even if there is no size assigned
2079 to them. NT loader doesn't like it if these section headers are
2080 included if the sections themselves are not needed */
2081 if (section.s_size == 0)
2082 internal_f.f_nscns--;
2087 if (coff_swap_scnhdr_out (abfd, §ion, &buff) == 0
2088 || bfd_write ((PTR) (&buff), 1, SCNHSZ, abfd) != SCNHSZ)
2095 /* OK, now set up the filehdr... */
2097 /* Don't include the internal abs section in the section count */
2100 We will NOT put a fucking timestamp in the header here. Every time you
2101 put it back, I will come in and take it out again. I'm sorry. This
2102 field does not belong here. We fill it with a 0 so it compares the
2103 same but is not a reasonable time. -- gnu@cygnus.com
2106 internal_f.f_flags = 0;
2108 if (abfd->flags & EXEC_P)
2109 internal_f.f_opthdr = AOUTSZ;
2111 internal_f.f_opthdr = 0;
2114 internal_f.f_flags |= F_RELFLG;
2116 internal_f.f_flags |= F_LNNO;
2117 if (abfd->flags & EXEC_P)
2118 internal_f.f_flags |= F_EXEC;
2120 if (!abfd->xvec->byteorder_big_p)
2121 internal_f.f_flags |= F_AR32WR;
2123 internal_f.f_flags |= F_AR32W;
2126 FIXME, should do something about the other byte orders and
2130 memset (&internal_a, 0, sizeof internal_a);
2132 /* Set up architecture-dependent stuff */
2135 unsigned int magic = 0;
2136 unsigned short flags = 0;
2137 coff_set_flags (abfd, &magic, &flags);
2138 internal_f.f_magic = magic;
2139 internal_f.f_flags |= flags;
2140 /* ...and the "opt"hdr... */
2143 #ifdef ULTRA3 /* NYU's machine */
2144 /* FIXME: This is a bogus check. I really want to see if there
2145 * is a .shbss or a .shdata section, if so then set the magic
2146 * number to indicate a shared data executable.
2148 if (internal_f.f_nscns >= 7)
2149 internal_a.magic = SHMAGIC; /* Shared magic */
2152 internal_a.magic = NMAGIC; /* Assume separate i/d */
2153 #define __A_MAGIC_SET__
2156 internal_a.magic = (magic == I960ROMAGIC ? NMAGIC : OMAGIC);
2157 #define __A_MAGIC_SET__
2160 #define __A_MAGIC_SET__
2161 internal_a.magic = PAGEMAGICBCS;
2165 #define __A_MAGIC_SET__
2166 internal_a.magic = APOLLO_COFF_VERSION_NUMBER;
2169 #if defined(M68) || defined(WE32K) || defined(M68K)
2170 #define __A_MAGIC_SET__
2172 internal_a.magic = LYNXCOFFMAGIC;
2174 #endif /* M68 || WE32K || M68K */
2177 #define __A_MAGIC_SET__
2178 internal_a.magic = ZMAGIC;
2181 #define __A_MAGIC_SET__
2183 internal_a.magic = LYNXCOFFMAGIC;
2185 internal_a.magic = ZMAGIC;
2190 #define __A_MAGIC_SET__
2192 internal_a.magic = LYNXCOFFMAGIC;
2197 #define __A_MAGIC_SET__
2198 internal_a.magic = (abfd->flags & D_PAGED) ? RS6K_AOUTHDR_ZMAGIC :
2199 (abfd->flags & WP_TEXT) ? RS6K_AOUTHDR_NMAGIC :
2200 RS6K_AOUTHDR_OMAGIC;
2203 #ifndef __A_MAGIC_SET__
2204 #include "Your aouthdr magic number is not being set!"
2206 #undef __A_MAGIC_SET__
2209 /* Now should write relocs, strings, syms */
2210 obj_sym_filepos (abfd) = sym_base;
2212 if (bfd_get_symcount (abfd) != 0)
2215 #ifndef RS6000COFF_C
2216 if (!coff_add_missing_symbols (abfd))
2219 if (!coff_renumber_symbols (abfd, &firstundef))
2221 coff_mangle_symbols (abfd);
2222 if (! coff_write_symbols (abfd))
2224 if (! coff_write_linenumbers (abfd))
2226 if (! coff_write_relocs (abfd, firstundef))
2230 /* If bfd_get_symcount (abfd) != 0, then we are not using the COFF
2231 backend linker, and obj_raw_syment_count is not valid until after
2232 coff_write_symbols is called. */
2233 if (obj_raw_syment_count (abfd) != 0)
2234 internal_f.f_symptr = sym_base;
2237 internal_f.f_symptr = 0;
2238 internal_f.f_flags |= F_LSYMS;
2243 internal_a.tsize = bfd_get_section_size_before_reloc (text_sec);
2244 internal_a.text_start = internal_a.tsize ? text_sec->vma : 0;
2248 internal_a.dsize = bfd_get_section_size_before_reloc (data_sec);
2249 internal_a.data_start = internal_a.dsize ? data_sec->vma : 0;
2253 internal_a.bsize = bfd_get_section_size_before_reloc (bss_sec);
2256 internal_a.entry = bfd_get_start_address (abfd);
2257 internal_f.f_nsyms = obj_raw_syment_count (abfd);
2261 #ifdef COFF_IMAGE_WITH_PE
2263 internal_f.pe = & extra_f;
2264 internal_a.pe = & extra_a;
2266 fill_pe_header_info (abfd, &internal_f, &internal_a);
2269 /* now write them */
2270 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
2274 coff_swap_filehdr_out (abfd, (PTR) & internal_f, (PTR) & buff);
2275 if (bfd_write ((PTR) & buff, 1, FILHSZ, abfd) != FILHSZ)
2278 if (abfd->flags & EXEC_P)
2281 coff_swap_aouthdr_out (abfd, (PTR) & internal_a, (PTR) & buff);
2282 if (bfd_write ((PTR) & buff, 1, AOUTSZ, abfd) != AOUTSZ)
2290 coff_set_section_contents (abfd, section, location, offset, count)
2295 bfd_size_type count;
2297 if (abfd->output_has_begun == false) /* set by bfd.c handler */
2298 coff_compute_section_file_positions (abfd);
2301 /* If this is a .lib section, bump the vma address so that it
2302 winds up being the number of .lib sections output. This is
2303 right for SVR3.2. Shared libraries should probably get more
2304 generic support. Ian Taylor <ian@cygnus.com>. */
2305 if (strcmp (section->name, _LIB) == 0)
2309 /* Don't write out bss sections - one way to do this is to
2310 see if the filepos has not been set. */
2311 if (section->filepos == 0)
2314 if (bfd_seek (abfd, (file_ptr) (section->filepos + offset), SEEK_SET) != 0)
2319 return (bfd_write (location, 1, count, abfd) == count) ? true : false;
2325 coff_close_and_cleanup (abfd)
2328 if (!bfd_read_p (abfd))
2329 switch (abfd->format)
2332 if (!_bfd_write_archive_contents (abfd))
2336 if (!coff_write_object_contents (abfd))
2340 bfd_set_error (bfd_error_invalid_operation);
2344 /* We depend on bfd_close to free all the memory on the obstack. */
2345 /* FIXME if bfd_release is not using obstacks! */
2352 buy_and_read (abfd, where, seek_direction, size)
2358 PTR area = (PTR) bfd_alloc (abfd, size);
2361 bfd_set_error (bfd_error_no_memory);
2364 if (bfd_seek (abfd, where, seek_direction) != 0
2365 || bfd_read (area, 1, size, abfd) != size)
2368 } /* buy_and_read() */
2374 Creating the linenumber table is done by reading in the entire
2375 coff linenumber table, and creating another table for internal use.
2377 A coff linenumber table is structured so that each function
2378 is marked as having a line number of 0. Each line within the
2379 function is an offset from the first line in the function. The
2380 base of the line number information for the table is stored in
2381 the symbol associated with the function.
2383 The information is copied from the external to the internal
2384 table, and each symbol which marks a function is marked by
2387 How does this work ?
2392 coff_slurp_line_table (abfd, asect)
2396 LINENO *native_lineno;
2397 alent *lineno_cache;
2399 BFD_ASSERT (asect->lineno == (alent *) NULL);
2401 native_lineno = (LINENO *) buy_and_read (abfd,
2402 asect->line_filepos,
2405 asect->lineno_count));
2407 (alent *) bfd_alloc (abfd, (size_t) ((asect->lineno_count + 1) * sizeof (alent)));
2408 if (lineno_cache == NULL)
2410 bfd_set_error (bfd_error_no_memory);
2415 unsigned int counter = 0;
2416 alent *cache_ptr = lineno_cache;
2417 LINENO *src = native_lineno;
2419 while (counter < asect->lineno_count)
2421 struct internal_lineno dst;
2422 coff_swap_lineno_in (abfd, src, &dst);
2423 cache_ptr->line_number = dst.l_lnno;
2425 if (cache_ptr->line_number == 0)
2427 coff_symbol_type *sym =
2428 (coff_symbol_type *) (dst.l_addr.l_symndx
2429 + obj_raw_syments (abfd))->u.syment._n._n_n._n_zeroes;
2430 cache_ptr->u.sym = (asymbol *) sym;
2431 sym->lineno = cache_ptr;
2435 cache_ptr->u.offset = dst.l_addr.l_paddr
2436 - bfd_section_vma (abfd, asect);
2437 } /* If no linenumber expect a symbol index */
2443 cache_ptr->line_number = 0;
2446 asect->lineno = lineno_cache;
2447 /* FIXME, free native_lineno here, or use alloca or something. */
2452 coff_slurp_symbol_table (abfd)
2455 combined_entry_type *native_symbols;
2456 coff_symbol_type *cached_area;
2457 unsigned int *table_ptr;
2459 unsigned int number_of_symbols = 0;
2461 if (obj_symbols (abfd))
2464 /* Read in the symbol table */
2465 if ((native_symbols = coff_get_normalized_symtab (abfd)) == NULL)
2470 /* Allocate enough room for all the symbols in cached form */
2471 cached_area = ((coff_symbol_type *)
2473 (obj_raw_syment_count (abfd)
2474 * sizeof (coff_symbol_type))));
2476 if (cached_area == NULL)
2478 bfd_set_error (bfd_error_no_memory);
2481 table_ptr = ((unsigned int *)
2483 (obj_raw_syment_count (abfd)
2484 * sizeof (unsigned int))));
2486 if (table_ptr == NULL)
2488 bfd_set_error (bfd_error_no_memory);
2493 coff_symbol_type *dst = cached_area;
2494 unsigned int last_native_index = obj_raw_syment_count (abfd);
2495 unsigned int this_index = 0;
2496 while (this_index < last_native_index)
2498 combined_entry_type *src = native_symbols + this_index;
2499 table_ptr[this_index] = number_of_symbols;
2500 dst->symbol.the_bfd = abfd;
2502 dst->symbol.name = (char *) (src->u.syment._n._n_n._n_offset);
2503 /* We use the native name field to point to the cached field. */
2504 src->u.syment._n._n_n._n_zeroes = (long) dst;
2505 dst->symbol.section = coff_section_from_bfd_index (abfd,
2506 src->u.syment.n_scnum);
2507 dst->symbol.flags = 0;
2508 dst->done_lineno = false;
2510 switch (src->u.syment.n_sclass)
2515 dst->symbol.value = src->u.syment.n_value - dst->symbol.section->vma;
2516 dst->symbol.flags = BSF_EXPORT | BSF_GLOBAL;
2517 dst->symbol.flags |= BSF_NOT_AT_END | BSF_FUNCTION;
2519 /* Fall through to next case */
2528 /* PE uses storage class 0x68 to denote a section symbol */
2531 if ((src->u.syment.n_scnum) == 0)
2533 if ((src->u.syment.n_value) == 0)
2535 dst->symbol.section = bfd_und_section_ptr;
2536 dst->symbol.value = 0;
2540 dst->symbol.section = bfd_com_section_ptr;
2541 dst->symbol.value = (src->u.syment.n_value);
2547 Base the value as an index from the base of the
2551 dst->symbol.flags = BSF_EXPORT | BSF_GLOBAL;
2552 dst->symbol.value = src->u.syment.n_value - dst->symbol.section->vma;
2554 if (ISFCN ((src->u.syment.n_type)))
2557 A function ext does not go at the end of a file
2559 dst->symbol.flags |= BSF_NOT_AT_END | BSF_FUNCTION;
2564 /* If this symbol has a csect aux of type LD, the scnlen field
2565 is actually the index of the containing csect symbol. We
2566 need to pointerize it. */
2567 if (src->u.syment.n_numaux > 0)
2569 combined_entry_type *aux;
2571 aux = src + src->u.syment.n_numaux - 1;
2572 if (SMTYP_SMTYP (aux->u.auxent.x_csect.x_smtyp) == XTY_LD)
2574 aux->u.auxent.x_csect.x_scnlen.p =
2575 native_symbols + aux->u.auxent.x_csect.x_scnlen.l;
2576 aux->fix_scnlen = 1;
2583 case C_STAT: /* static */
2585 case C_LEAFSTAT: /* static leaf procedure */
2587 case C_LABEL: /* label */
2588 if (src->u.syment.n_scnum == -2)
2589 dst->symbol.flags = BSF_DEBUGGING;
2591 dst->symbol.flags = BSF_LOCAL;
2593 Base the value as an index from the base of the section, if
2596 if (dst->symbol.section)
2597 dst->symbol.value = (src->u.syment.n_value) -
2598 dst->symbol.section->vma;
2600 dst->symbol.value = (src->u.syment.n_value);
2603 case C_MOS: /* member of structure */
2604 case C_EOS: /* end of structure */
2605 #ifdef NOTDEF /* C_AUTOARG has the same value */
2607 case C_GLBLREG: /* A29k-specific storage class */
2610 case C_REGPARM: /* register parameter */
2611 case C_REG: /* register variable */
2613 case C_AUTOARG: /* 960-specific storage class */
2615 case C_TPDEF: /* type definition */
2617 case C_AUTO: /* automatic variable */
2618 case C_FIELD: /* bit field */
2619 case C_ENTAG: /* enumeration tag */
2620 case C_MOE: /* member of enumeration */
2621 case C_MOU: /* member of union */
2622 case C_UNTAG: /* union tag */
2623 dst->symbol.flags = BSF_DEBUGGING;
2624 dst->symbol.value = (src->u.syment.n_value);
2627 case C_FILE: /* file name */
2628 case C_STRTAG: /* structure tag */
2630 case C_BINCL: /* beginning of include file */
2631 case C_EINCL: /* ending of include file */
2643 dst->symbol.flags = BSF_DEBUGGING;
2644 dst->symbol.value = (src->u.syment.n_value);
2649 dst->symbol.flags = BSF_DEBUGGING;
2650 dst->symbol.value = src->u.syment.n_value;
2652 /* The value is actually a symbol index. Save a pointer to
2653 the symbol instead of the index. FIXME: This should use a
2655 src->u.syment.n_value =
2656 (long) (native_symbols + src->u.syment.n_value);
2661 case C_BLOCK: /* ".bb" or ".eb" */
2662 case C_FCN: /* ".bf" or ".ef" */
2663 case C_EFCN: /* physical end of function */
2664 dst->symbol.flags = BSF_LOCAL;
2666 Base the value as an index from the base of the section
2668 dst->symbol.value = (src->u.syment.n_value) - dst->symbol.section->vma;
2672 case C_EXTDEF: /* external definition */
2673 case C_ULABEL: /* undefined label */
2674 case C_USTATIC: /* undefined static */
2675 #ifndef COFF_WITH_PE
2676 /* C_LINE in regular coff is 0x68. NT has taken over this storage
2677 class to represent a section symbol */
2678 case C_LINE: /* line # reformatted as symbol table entry */
2680 case C_ALIAS: /* duplicate tag */
2681 case C_HIDDEN: /* ext symbol in dmert public lib */
2684 fprintf (stderr, "Unrecognized storage class %d (assuming debugging)\n for %s symbol `%s'\n",
2685 src->u.syment.n_sclass, dst->symbol.section->name,
2688 dst->symbol.flags = BSF_DEBUGGING;
2689 dst->symbol.value = (src->u.syment.n_value);
2693 /* BFD_ASSERT(dst->symbol.flags != 0);*/
2697 dst->symbol.udata.i = 0;
2698 dst->lineno = (alent *) NULL;
2699 this_index += (src->u.syment.n_numaux) + 1;
2701 number_of_symbols++;
2702 } /* walk the native symtab */
2703 } /* bfdize the native symtab */
2705 obj_symbols (abfd) = cached_area;
2706 obj_raw_syments (abfd) = native_symbols;
2708 bfd_get_symcount (abfd) = number_of_symbols;
2709 obj_convert (abfd) = table_ptr;
2710 /* Slurp the line tables for each section too */
2716 coff_slurp_line_table (abfd, p);
2721 } /* coff_slurp_symbol_table() */
2723 /* Check whether a symbol is globally visible. This is used by the
2724 COFF backend linker code in cofflink.c, since a couple of targets
2725 have globally visible symbols which are not class C_EXT. This
2726 function need not handle the case of n_class == C_EXT. */
2728 #undef OTHER_GLOBAL_CLASS
2731 #define OTHER_GLOBAL_CLASS C_LEAFEXT
2735 #define OTHER_GLOBAL_CLASS C_HIDEXT
2739 #define OTHER_GLOBAL_CLASS C_SECTION
2742 #ifdef OTHER_GLOBAL_CLASS
2745 coff_sym_is_global (abfd, syment)
2747 struct internal_syment *syment;
2749 if (syment->n_sclass == OTHER_GLOBAL_CLASS)
2754 #undef OTHER_GLOBAL_CLASS
2756 #else /* ! defined (OTHER_GLOBAL_CLASS) */
2758 /* sym_is_global should not be defined if it has nothing to do. */
2760 #define coff_sym_is_global 0
2762 #endif /* ! defined (OTHER_GLOBAL_CLASS) */
2768 Coff relocations are easily transformed into the internal BFD form
2771 Reading a coff relocation table is done in the following stages:
2773 o Read the entire coff relocation table into memory.
2775 o Process each relocation in turn; first swap it from the
2776 external to the internal form.
2778 o Turn the symbol referenced in the relocation's symbol index
2779 into a pointer into the canonical symbol table.
2780 This table is the same as the one returned by a call to
2781 @code{bfd_canonicalize_symtab}. The back end will call that
2782 routine and save the result if a canonicalization hasn't been done.
2784 o The reloc index is turned into a pointer to a howto
2785 structure, in a back end specific way. For instance, the 386
2786 and 960 use the @code{r_type} to directly produce an index
2787 into a howto table vector; the 88k subtracts a number from the
2788 @code{r_type} field and creates an addend field.
2794 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
2796 coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \
2797 if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
2798 coffsym = (obj_symbols (abfd) \
2799 + (cache_ptr->sym_ptr_ptr - symbols)); \
2801 coffsym = coff_symbol_from (abfd, ptr); \
2802 if (coffsym != (coff_symbol_type *) NULL \
2803 && coffsym->native->u.syment.n_scnum == 0) \
2804 cache_ptr->addend = 0; \
2805 else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
2806 && ptr->section != (asection *) NULL) \
2807 cache_ptr->addend = - (ptr->section->vma + ptr->value); \
2809 cache_ptr->addend = 0; \
2814 coff_slurp_reloc_table (abfd, asect, symbols)
2819 RELOC *native_relocs;
2820 arelent *reloc_cache;
2825 if (asect->relocation)
2827 if (asect->reloc_count == 0)
2829 if (asect->flags & SEC_CONSTRUCTOR)
2831 if (!coff_slurp_symbol_table (abfd))
2834 (RELOC *) buy_and_read (abfd,
2838 asect->reloc_count));
2839 reloc_cache = (arelent *)
2840 bfd_alloc (abfd, (size_t) (asect->reloc_count * sizeof (arelent)));
2842 if (reloc_cache == NULL)
2844 bfd_set_error (bfd_error_no_memory);
2849 for (idx = 0; idx < asect->reloc_count; idx++)
2851 #ifdef RELOC_PROCESSING
2852 struct internal_reloc dst;
2853 struct external_reloc *src;
2855 cache_ptr = reloc_cache + idx;
2856 src = native_relocs + idx;
2857 coff_swap_reloc_in (abfd, src, &dst);
2859 RELOC_PROCESSING (cache_ptr, &dst, symbols, abfd, asect);
2861 struct internal_reloc dst;
2863 struct external_reloc *src;
2865 cache_ptr = reloc_cache + idx;
2866 src = native_relocs + idx;
2868 coff_swap_reloc_in (abfd, src, &dst);
2871 cache_ptr->address = dst.r_vaddr;
2873 if (dst.r_symndx != -1)
2875 /* @@ Should never be greater than count of symbols! */
2876 if (dst.r_symndx >= obj_conv_table_size (abfd))
2878 cache_ptr->sym_ptr_ptr = symbols + obj_convert (abfd)[dst.r_symndx];
2879 ptr = *(cache_ptr->sym_ptr_ptr);
2883 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
2887 /* The symbols definitions that we have read in have been
2888 relocated as if their sections started at 0. But the offsets
2889 refering to the symbols in the raw data have not been
2890 modified, so we have to have a negative addend to compensate.
2892 Note that symbols which used to be common must be left alone */
2894 /* Calculate any reloc addend by looking at the symbol */
2895 CALC_ADDEND (abfd, ptr, dst, cache_ptr);
2897 cache_ptr->address -= asect->vma;
2898 /* !! cache_ptr->section = (asection *) NULL;*/
2900 /* Fill in the cache_ptr->howto field from dst.r_type */
2901 RTYPE2HOWTO (cache_ptr, &dst);
2906 asect->relocation = reloc_cache;
2910 #ifndef coff_rtype_to_howto
2913 /* Get the howto structure for a reloc. This is only used if the file
2914 including this one defines coff_relocate_section to be
2915 _bfd_coff_generic_relocate_section, so it is OK if it does not
2916 always work. It is the responsibility of the including file to
2917 make sure it is reasonable if it is needed. */
2919 static reloc_howto_type *coff_rtype_to_howto
2920 PARAMS ((bfd *, asection *, struct internal_reloc *,
2921 struct coff_link_hash_entry *, struct internal_syment *,
2925 static reloc_howto_type *
2926 coff_rtype_to_howto (abfd, sec, rel, h, sym, addendp)
2929 struct internal_reloc *rel;
2930 struct coff_link_hash_entry *h;
2931 struct internal_syment *sym;
2936 RTYPE2HOWTO (&genrel, rel);
2937 return genrel.howto;
2940 #else /* ! defined (RTYPE2HOWTO) */
2942 #define coff_rtype_to_howto NULL
2944 #endif /* ! defined (RTYPE2HOWTO) */
2945 #endif /* ! defined (coff_rtype_to_howto) */
2947 /* This is stupid. This function should be a boolean predicate. */
2949 coff_canonicalize_reloc (abfd, section, relptr, symbols)
2955 arelent *tblptr = section->relocation;
2956 unsigned int count = 0;
2959 if (section->flags & SEC_CONSTRUCTOR)
2961 /* this section has relocs made up by us, they are not in the
2962 file, so take them out of their chain and place them into
2963 the data area provided */
2964 arelent_chain *chain = section->constructor_chain;
2965 for (count = 0; count < section->reloc_count; count++)
2967 *relptr++ = &chain->relent;
2968 chain = chain->next;
2974 if (! coff_slurp_reloc_table (abfd, section, symbols))
2977 tblptr = section->relocation;
2979 for (; count++ < section->reloc_count;)
2980 *relptr++ = tblptr++;
2985 return section->reloc_count;
2990 coff_sym_filepos (abfd)
2993 return obj_sym_filepos (abfd);
2997 #ifndef coff_reloc16_estimate
2998 #define coff_reloc16_estimate dummy_reloc16_estimate
3001 dummy_reloc16_estimate (abfd, input_section, reloc, shrink, link_info)
3003 asection *input_section;
3005 unsigned int shrink;
3006 struct bfd_link_info *link_info;
3013 #ifndef coff_reloc16_extra_cases
3014 #define coff_reloc16_extra_cases dummy_reloc16_extra_cases
3015 /* This works even if abort is not declared in any header file. */
3017 dummy_reloc16_extra_cases (abfd, link_info, link_order, reloc, data, src_ptr,
3020 struct bfd_link_info *link_info;
3021 struct bfd_link_order *link_order;
3024 unsigned int *src_ptr;
3025 unsigned int *dst_ptr;
3027 fprintf (stderr, "%s\n", reloc->howto->name);
3032 /* If coff_relocate_section is defined, we can use the optimized COFF
3033 backend linker. Otherwise we must continue to use the old linker. */
3034 #ifdef coff_relocate_section
3035 #ifndef coff_bfd_link_hash_table_create
3036 #define coff_bfd_link_hash_table_create _bfd_coff_link_hash_table_create
3038 #ifndef coff_bfd_link_add_symbols
3039 #define coff_bfd_link_add_symbols _bfd_coff_link_add_symbols
3041 #ifndef coff_bfd_final_link
3042 #define coff_bfd_final_link _bfd_coff_final_link
3044 #else /* ! defined (coff_relocate_section) */
3045 #define coff_relocate_section NULL
3046 #define coff_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
3047 #define coff_bfd_link_add_symbols _bfd_generic_link_add_symbols
3048 #define coff_bfd_final_link _bfd_generic_final_link
3049 #endif /* ! defined (coff_relocate_section) */
3050 #define coff_bfd_link_split_section _bfd_generic_link_split_section
3052 #ifndef coff_adjust_symndx
3053 #define coff_adjust_symndx NULL
3056 static CONST bfd_coff_backend_data bfd_coff_std_swap_table =
3058 coff_swap_aux_in, coff_swap_sym_in, coff_swap_lineno_in,
3059 coff_swap_aux_out, coff_swap_sym_out,
3060 coff_swap_lineno_out, coff_swap_reloc_out,
3061 coff_swap_filehdr_out, coff_swap_aouthdr_out,
3062 coff_swap_scnhdr_out,
3063 FILHSZ, AOUTSZ, SCNHSZ, SYMESZ, AUXESZ, RELSZ, LINESZ,
3064 #ifdef COFF_LONG_FILENAMES
3069 coff_swap_filehdr_in, coff_swap_aouthdr_in, coff_swap_scnhdr_in,
3070 coff_swap_reloc_in, coff_bad_format_hook, coff_set_arch_mach_hook,
3071 coff_mkobject_hook, styp_to_sec_flags, coff_make_section_hook,
3072 coff_set_alignment_hook, coff_slurp_symbol_table, symname_in_debug_hook,
3073 coff_reloc16_extra_cases, coff_reloc16_estimate,
3074 coff_sym_is_global, coff_compute_section_file_positions,
3075 coff_relocate_section, coff_rtype_to_howto, coff_adjust_symndx
3078 #define coff_close_and_cleanup _bfd_generic_close_and_cleanup
3079 #define coff_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
3080 #define coff_get_section_contents _bfd_generic_get_section_contents
3082 #define coff_bfd_copy_private_symbol_data \
3083 _bfd_generic_bfd_copy_private_symbol_data
3084 #define coff_bfd_copy_private_section_data \
3085 _bfd_generic_bfd_copy_private_section_data
3086 #define coff_bfd_copy_private_bfd_data _bfd_generic_bfd_copy_private_bfd_data
3087 #define coff_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
3088 #define coff_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
3090 #ifndef coff_bfd_is_local_label
3091 #define coff_bfd_is_local_label bfd_generic_is_local_label
3093 #ifndef coff_read_minisymbols
3094 #define coff_read_minisymbols _bfd_generic_read_minisymbols
3096 #ifndef coff_minisymbol_to_symbol
3097 #define coff_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
3100 /* The reloc lookup routine must be supplied by each individual COFF
3102 #ifndef coff_bfd_reloc_type_lookup
3103 #define coff_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
3106 #ifndef coff_bfd_get_relocated_section_contents
3107 #define coff_bfd_get_relocated_section_contents \
3108 bfd_generic_get_relocated_section_contents
3110 #ifndef coff_bfd_relax_section
3111 #define coff_bfd_relax_section bfd_generic_relax_section