1 /* Support for the generic parts of most COFF variants, for BFD.
2 Copyright 1990, 1991, 1992, 1993, 1994 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
22 Most of this hacked by Steve Chamberlain,
30 BFD supports a number of different flavours of coff format.
31 The major differences between formats are the sizes and
32 alignments of fields in structures on disk, and the occasional
35 Coff in all its varieties is implemented with a few common
36 files and a number of implementation specific files. For
37 example, The 88k bcs coff format is implemented in the file
38 @file{coff-m88k.c}. This file @code{#include}s
39 @file{coff/m88k.h} which defines the external structure of the
40 coff format for the 88k, and @file{coff/internal.h} which
41 defines the internal structure. @file{coff-m88k.c} also
42 defines the relocations used by the 88k format
45 The Intel i960 processor version of coff is implemented in
46 @file{coff-i960.c}. This file has the same structure as
47 @file{coff-m88k.c}, except that it includes @file{coff/i960.h}
48 rather than @file{coff-m88k.h}.
51 Porting to a new version of coff
53 The recommended method is to select from the existing
54 implementations the version of coff which is most like the one
55 you want to use. For example, we'll say that i386 coff is
56 the one you select, and that your coff flavour is called foo.
57 Copy @file{i386coff.c} to @file{foocoff.c}, copy
58 @file{../include/coff/i386.h} to @file{../include/coff/foo.h},
59 and add the lines to @file{targets.c} and @file{Makefile.in}
60 so that your new back end is used. Alter the shapes of the
61 structures in @file{../include/coff/foo.h} so that they match
62 what you need. You will probably also have to add
63 @code{#ifdef}s to the code in @file{coff/internal.h} and
64 @file{coffcode.h} if your version of coff is too wild.
66 You can verify that your new BFD backend works quite simply by
67 building @file{objdump} from the @file{binutils} directory,
68 and making sure that its version of what's going on and your
69 host system's idea (assuming it has the pretty standard coff
70 dump utility, usually called @code{att-dump} or just
71 @code{dump}) are the same. Then clean up your code, and send
72 what you've done to Cygnus. Then your stuff will be in the
73 next release, and you won't have to keep integrating it.
76 How the coff backend works
81 The Coff backend is split into generic routines that are
82 applicable to any Coff target and routines that are specific
83 to a particular target. The target-specific routines are
84 further split into ones which are basically the same for all
85 Coff targets except that they use the external symbol format
86 or use different values for certain constants.
88 The generic routines are in @file{coffgen.c}. These routines
89 work for any Coff target. They use some hooks into the target
90 specific code; the hooks are in a @code{bfd_coff_backend_data}
91 structure, one of which exists for each target.
93 The essentially similar target-specific routines are in
94 @file{coffcode.h}. This header file includes executable C code.
95 The various Coff targets first include the appropriate Coff
96 header file, make any special defines that are needed, and
97 then include @file{coffcode.h}.
99 Some of the Coff targets then also have additional routines in
100 the target source file itself.
102 For example, @file{coff-i960.c} includes
103 @file{coff/internal.h} and @file{coff/i960.h}. It then
104 defines a few constants, such as @code{I960}, and includes
105 @file{coffcode.h}. Since the i960 has complex relocation
106 types, @file{coff-i960.c} also includes some code to
107 manipulate the i960 relocs. This code is not in
108 @file{coffcode.h} because it would not be used by any other
114 Each flavour of coff supported in BFD has its own header file
115 describing the external layout of the structures. There is also
116 an internal description of the coff layout, in
117 @file{coff/internal.h}. A major function of the
118 coff backend is swapping the bytes and twiddling the bits to
119 translate the external form of the structures into the normal
120 internal form. This is all performed in the
121 @code{bfd_swap}_@i{thing}_@i{direction} routines. Some
122 elements are different sizes between different versions of
123 coff; it is the duty of the coff version specific include file
124 to override the definitions of various packing routines in
125 @file{coffcode.h}. E.g., the size of line number entry in coff is
126 sometimes 16 bits, and sometimes 32 bits. @code{#define}ing
127 @code{PUT_LNSZ_LNNO} and @code{GET_LNSZ_LNNO} will select the
128 correct one. No doubt, some day someone will find a version of
129 coff which has a varying field size not catered to at the
130 moment. To port BFD, that person will have to add more @code{#defines}.
131 Three of the bit twiddling routines are exported to
132 @code{gdb}; @code{coff_swap_aux_in}, @code{coff_swap_sym_in}
133 and @code{coff_swap_linno_in}. @code{GDB} reads the symbol
134 table on its own, but uses BFD to fix things up. More of the
135 bit twiddlers are exported for @code{gas};
136 @code{coff_swap_aux_out}, @code{coff_swap_sym_out},
137 @code{coff_swap_lineno_out}, @code{coff_swap_reloc_out},
138 @code{coff_swap_filehdr_out}, @code{coff_swap_aouthdr_out},
139 @code{coff_swap_scnhdr_out}. @code{Gas} currently keeps track
140 of all the symbol table and reloc drudgery itself, thereby
141 saving the internal BFD overhead, but uses BFD to swap things
142 on the way out, making cross ports much safer. Doing so also
143 allows BFD (and thus the linker) to use the same header files
144 as @code{gas}, which makes one avenue to disaster disappear.
149 The simple canonical form for symbols used by BFD is not rich
150 enough to keep all the information available in a coff symbol
151 table. The back end gets around this problem by keeping the original
152 symbol table around, "behind the scenes".
154 When a symbol table is requested (through a call to
155 @code{bfd_canonicalize_symtab}), a request gets through to
156 @code{coff_get_normalized_symtab}. This reads the symbol table from
157 the coff file and swaps all the structures inside into the
158 internal form. It also fixes up all the pointers in the table
159 (represented in the file by offsets from the first symbol in
160 the table) into physical pointers to elements in the new
161 internal table. This involves some work since the meanings of
162 fields change depending upon context: a field that is a
163 pointer to another structure in the symbol table at one moment
164 may be the size in bytes of a structure at the next. Another
165 pass is made over the table. All symbols which mark file names
166 (<<C_FILE>> symbols) are modified so that the internal
167 string points to the value in the auxent (the real filename)
168 rather than the normal text associated with the symbol
171 At this time the symbol names are moved around. Coff stores
172 all symbols less than nine characters long physically
173 within the symbol table; longer strings are kept at the end of
174 the file in the string table. This pass moves all strings
175 into memory and replaces them with pointers to the strings.
178 The symbol table is massaged once again, this time to create
179 the canonical table used by the BFD application. Each symbol
180 is inspected in turn, and a decision made (using the
181 @code{sclass} field) about the various flags to set in the
182 @code{asymbol}. @xref{Symbols}. The generated canonical table
183 shares strings with the hidden internal symbol table.
185 Any linenumbers are read from the coff file too, and attached
186 to the symbols which own the functions the linenumbers belong to.
191 Writing a symbol to a coff file which didn't come from a coff
192 file will lose any debugging information. The @code{asymbol}
193 structure remembers the BFD from which the symbol was taken, and on
194 output the back end makes sure that the same destination target as
195 source target is present.
197 When the symbols have come from a coff file then all the
198 debugging information is preserved.
200 Symbol tables are provided for writing to the back end in a
201 vector of pointers to pointers. This allows applications like
202 the linker to accumulate and output large symbol tables
203 without having to do too much byte copying.
205 This function runs through the provided symbol table and
206 patches each symbol marked as a file place holder
207 (@code{C_FILE}) to point to the next file place holder in the
208 list. It also marks each @code{offset} field in the list with
209 the offset from the first symbol of the current symbol.
211 Another function of this procedure is to turn the canonical
212 value form of BFD into the form used by coff. Internally, BFD
213 expects symbol values to be offsets from a section base; so a
214 symbol physically at 0x120, but in a section starting at
215 0x100, would have the value 0x20. Coff expects symbols to
216 contain their final value, so symbols have their values
217 changed at this point to reflect their sum with their owning
218 section. This transformation uses the
219 <<output_section>> field of the @code{asymbol}'s
220 @code{asection} @xref{Sections}.
222 o <<coff_mangle_symbols>>
224 This routine runs though the provided symbol table and uses
225 the offsets generated by the previous pass and the pointers
226 generated when the symbol table was read in to create the
227 structured hierachy required by coff. It changes each pointer
228 to a symbol into the index into the symbol table of the asymbol.
230 o <<coff_write_symbols>>
232 This routine runs through the symbol table and patches up the
233 symbols from their internal form into the coff way, calls the
234 bit twiddlers, and writes out the table to the file.
243 The hidden information for an <<asymbol>> is described in a
244 <<combined_entry_type>>:
248 .typedef struct coff_ptr_struct
251 . {* Remembers the offset from the first symbol in the file for
252 . this symbol. Generated by coff_renumber_symbols. *}
253 .unsigned int offset;
255 . {* Should the value of this symbol be renumbered. Used for
256 . XCOFF C_BSTAT symbols. Set by coff_slurp_symbol_table. *}
257 .unsigned int fix_value : 1;
259 . {* Should the tag field of this symbol be renumbered.
260 . Created by coff_pointerize_aux. *}
261 .unsigned int fix_tag : 1;
263 . {* Should the endidx field of this symbol be renumbered.
264 . Created by coff_pointerize_aux. *}
265 .unsigned int fix_end : 1;
267 . {* Should the x_csect.x_scnlen field be renumbered.
268 . Created by coff_slurp_symbol_table. *}
269 .unsigned int fix_scnlen : 1;
271 . {* The container for the symbol structure as read and translated
275 . union internal_auxent auxent;
276 . struct internal_syment syment;
278 .} combined_entry_type;
281 .{* Each canonical asymbol really looks like this: *}
283 .typedef struct coff_symbol_struct
285 . {* The actual symbol which the rest of BFD works with *}
288 . {* A pointer to the hidden information for this symbol *}
289 .combined_entry_type *native;
291 . {* A pointer to the linenumber information for this symbol *}
292 .struct lineno_cache_entry *lineno;
294 . {* Have the line numbers been relocated yet ? *}
295 .boolean done_lineno;
301 #include "coffswap.h"
303 /* void warning(); */
306 * Return a word with STYP_* (scnhdr.s_flags) flags set to represent the
307 * incoming SEC_* flags. The inverse of this function is styp_to_sec_flags().
308 * NOTE: If you add to/change this routine, you should mirror the changes
309 * in styp_to_sec_flags().
312 sec_to_styp_flags (sec_name, sec_flags)
313 CONST char *sec_name;
318 if (!strcmp (sec_name, _TEXT))
320 styp_flags = STYP_TEXT;
322 else if (!strcmp (sec_name, _DATA))
324 styp_flags = STYP_DATA;
327 else if (!strcmp (sec_name, ".data2"))
329 styp_flags = STYP_DATA;
330 #endif /* TWO_DATA_SECS */
332 else if (!strcmp (sec_name, _BSS))
334 styp_flags = STYP_BSS;
337 else if (!strcmp (sec_name, _COMMENT))
339 styp_flags = STYP_INFO;
340 #endif /* _COMMENT */
343 else if (!strcmp (sec_name, _LIB))
345 styp_flags = STYP_LIB;
349 else if (!strcmp (sec_name, _LIT))
351 styp_flags = STYP_LIT;
354 else if (!strcmp (sec_name, ".debug"))
357 styp_flags = STYP_DEBUG;
359 styp_flags = STYP_INFO;
362 else if (!strcmp (sec_name, ".stab")
363 || !strncmp (sec_name, ".stabstr", 8))
365 styp_flags = STYP_INFO;
367 /* Try and figure out what it should be */
368 else if (sec_flags & SEC_CODE)
370 styp_flags = STYP_TEXT;
372 else if (sec_flags & SEC_DATA)
374 styp_flags = STYP_DATA;
376 else if (sec_flags & SEC_READONLY)
378 #ifdef STYP_LIT /* 29k readonly text/data section */
379 styp_flags = STYP_LIT;
381 styp_flags = STYP_TEXT;
382 #endif /* STYP_LIT */
384 else if (sec_flags & SEC_LOAD)
386 styp_flags = STYP_TEXT;
388 else if (sec_flags & SEC_ALLOC)
390 styp_flags = STYP_BSS;
394 if ((sec_flags & (SEC_NEVER_LOAD | SEC_COFF_SHARED_LIBRARY)) != 0)
395 styp_flags |= STYP_NOLOAD;
401 * Return a word with SEC_* flags set to represent the incoming
402 * STYP_* flags (from scnhdr.s_flags). The inverse of this
403 * function is sec_to_styp_flags().
404 * NOTE: If you add to/change this routine, you should mirror the changes
405 * in sec_to_styp_flags().
408 styp_to_sec_flags (abfd, hdr)
412 struct internal_scnhdr *internal_s = (struct internal_scnhdr *) hdr;
413 long styp_flags = internal_s->s_flags;
414 flagword sec_flags = 0;
417 if (styp_flags & STYP_NOLOAD)
419 sec_flags |= SEC_NEVER_LOAD;
421 #endif /* STYP_NOLOAD */
423 /* For 386 COFF, at least, an unloadable text or data section is
424 actually a shared library section. */
425 if (styp_flags & STYP_TEXT)
427 if (sec_flags & SEC_NEVER_LOAD)
428 sec_flags |= SEC_CODE | SEC_COFF_SHARED_LIBRARY;
430 sec_flags |= SEC_CODE | SEC_LOAD | SEC_ALLOC;
432 else if (styp_flags & STYP_DATA)
434 if (sec_flags & SEC_NEVER_LOAD)
435 sec_flags |= SEC_DATA | SEC_COFF_SHARED_LIBRARY;
437 sec_flags |= SEC_DATA | SEC_LOAD | SEC_ALLOC;
439 else if (styp_flags & STYP_BSS)
441 #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
442 if (sec_flags & SEC_NEVER_LOAD)
443 sec_flags |= SEC_ALLOC | SEC_COFF_SHARED_LIBRARY;
446 sec_flags |= SEC_ALLOC;
448 else if (styp_flags & STYP_INFO)
450 /* This should be marked as SEC_DEBUGGING, but that can't be
451 done until we make sure that strip can still work. strip
452 will probably have to preserve the same number of sections to
453 ensure that the section vma matches the section file
458 sec_flags |= SEC_ALLOC | SEC_LOAD;
461 #ifdef STYP_LIT /* A29k readonly text/data section type */
462 if ((styp_flags & STYP_LIT) == STYP_LIT)
464 sec_flags = (SEC_LOAD | SEC_ALLOC | SEC_READONLY);
466 #endif /* STYP_LIT */
467 #ifdef STYP_OTHER_LOAD /* Other loaded sections */
468 if (styp_flags & STYP_OTHER_LOAD)
470 sec_flags = (SEC_LOAD | SEC_ALLOC);
472 #endif /* STYP_SDATA */
477 #define get_index(symbol) ((long) (symbol)->udata)
481 bfd_coff_backend_data
485 Special entry points for gdb to swap in coff symbol table parts:
488 . void (*_bfd_coff_swap_aux_in) PARAMS ((
497 . void (*_bfd_coff_swap_sym_in) PARAMS ((
502 . void (*_bfd_coff_swap_lineno_in) PARAMS ((
508 Special entry points for gas to swap out coff parts:
510 . unsigned int (*_bfd_coff_swap_aux_out) PARAMS ((
519 . unsigned int (*_bfd_coff_swap_sym_out) PARAMS ((
524 . unsigned int (*_bfd_coff_swap_lineno_out) PARAMS ((
529 . unsigned int (*_bfd_coff_swap_reloc_out) PARAMS ((
534 . unsigned int (*_bfd_coff_swap_filehdr_out) PARAMS ((
539 . unsigned int (*_bfd_coff_swap_aouthdr_out) PARAMS ((
544 . unsigned int (*_bfd_coff_swap_scnhdr_out) PARAMS ((
550 Special entry points for generic COFF routines to call target
551 dependent COFF routines:
553 . unsigned int _bfd_filhsz;
554 . unsigned int _bfd_aoutsz;
555 . unsigned int _bfd_scnhsz;
556 . unsigned int _bfd_symesz;
557 . unsigned int _bfd_auxesz;
558 . unsigned int _bfd_linesz;
559 . boolean _bfd_coff_long_filenames;
560 . void (*_bfd_coff_swap_filehdr_in) PARAMS ((
564 . void (*_bfd_coff_swap_aouthdr_in) PARAMS ((
568 . void (*_bfd_coff_swap_scnhdr_in) PARAMS ((
572 . boolean (*_bfd_coff_bad_format_hook) PARAMS ((
574 . PTR internal_filehdr));
575 . boolean (*_bfd_coff_set_arch_mach_hook) PARAMS ((
577 . PTR internal_filehdr));
578 . PTR (*_bfd_coff_mkobject_hook) PARAMS ((
580 . PTR internal_filehdr,
581 . PTR internal_aouthdr));
582 . flagword (*_bfd_styp_to_sec_flags_hook) PARAMS ((
584 . PTR internal_scnhdr));
585 . asection *(*_bfd_make_section_hook) PARAMS ((
588 . void (*_bfd_set_alignment_hook) PARAMS ((
591 . PTR internal_scnhdr));
592 . boolean (*_bfd_coff_slurp_symbol_table) PARAMS ((
594 . boolean (*_bfd_coff_symname_in_debug) PARAMS ((
596 . struct internal_syment *sym));
597 . void (*_bfd_coff_reloc16_extra_cases) PARAMS ((
599 . struct bfd_link_info *link_info,
600 . struct bfd_link_order *link_order,
603 . unsigned int *src_ptr,
604 . unsigned int *dst_ptr));
605 . int (*_bfd_coff_reloc16_estimate) PARAMS ((
607 . asection *input_section,
609 . unsigned int shrink,
610 . struct bfd_link_info *link_info));
612 .} bfd_coff_backend_data;
614 .#define coff_backend_info(abfd) ((bfd_coff_backend_data *) (abfd)->xvec->backend_data)
616 .#define bfd_coff_swap_aux_in(a,e,t,c,ind,num,i) \
617 . ((coff_backend_info (a)->_bfd_coff_swap_aux_in) (a,e,t,c,ind,num,i))
619 .#define bfd_coff_swap_sym_in(a,e,i) \
620 . ((coff_backend_info (a)->_bfd_coff_swap_sym_in) (a,e,i))
622 .#define bfd_coff_swap_lineno_in(a,e,i) \
623 . ((coff_backend_info ( a)->_bfd_coff_swap_lineno_in) (a,e,i))
625 .#define bfd_coff_swap_reloc_out(abfd, i, o) \
626 . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_out) (abfd, i, o))
628 .#define bfd_coff_swap_lineno_out(abfd, i, o) \
629 . ((coff_backend_info (abfd)->_bfd_coff_swap_lineno_out) (abfd, i, o))
631 .#define bfd_coff_swap_aux_out(a,i,t,c,ind,num,o) \
632 . ((coff_backend_info (a)->_bfd_coff_swap_aux_out) (a,i,t,c,ind,num,o))
634 .#define bfd_coff_swap_sym_out(abfd, i,o) \
635 . ((coff_backend_info (abfd)->_bfd_coff_swap_sym_out) (abfd, i, o))
637 .#define bfd_coff_swap_scnhdr_out(abfd, i,o) \
638 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_out) (abfd, i, o))
640 .#define bfd_coff_swap_filehdr_out(abfd, i,o) \
641 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_out) (abfd, i, o))
643 .#define bfd_coff_swap_aouthdr_out(abfd, i,o) \
644 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_out) (abfd, i, o))
646 .#define bfd_coff_filhsz(abfd) (coff_backend_info (abfd)->_bfd_filhsz)
647 .#define bfd_coff_aoutsz(abfd) (coff_backend_info (abfd)->_bfd_aoutsz)
648 .#define bfd_coff_scnhsz(abfd) (coff_backend_info (abfd)->_bfd_scnhsz)
649 .#define bfd_coff_symesz(abfd) (coff_backend_info (abfd)->_bfd_symesz)
650 .#define bfd_coff_auxesz(abfd) (coff_backend_info (abfd)->_bfd_auxesz)
651 .#define bfd_coff_linesz(abfd) (coff_backend_info (abfd)->_bfd_linesz)
652 .#define bfd_coff_long_filenames(abfd) (coff_backend_info (abfd)->_bfd_coff_long_filenames)
653 .#define bfd_coff_swap_filehdr_in(abfd, i,o) \
654 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_in) (abfd, i, o))
656 .#define bfd_coff_swap_aouthdr_in(abfd, i,o) \
657 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_in) (abfd, i, o))
659 .#define bfd_coff_swap_scnhdr_in(abfd, i,o) \
660 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_in) (abfd, i, o))
662 .#define bfd_coff_bad_format_hook(abfd, filehdr) \
663 . ((coff_backend_info (abfd)->_bfd_coff_bad_format_hook) (abfd, filehdr))
665 .#define bfd_coff_set_arch_mach_hook(abfd, filehdr)\
666 . ((coff_backend_info (abfd)->_bfd_coff_set_arch_mach_hook) (abfd, filehdr))
667 .#define bfd_coff_mkobject_hook(abfd, filehdr, aouthdr)\
668 . ((coff_backend_info (abfd)->_bfd_coff_mkobject_hook) (abfd, filehdr, aouthdr))
670 .#define bfd_coff_styp_to_sec_flags_hook(abfd, scnhdr)\
671 . ((coff_backend_info (abfd)->_bfd_styp_to_sec_flags_hook) (abfd, scnhdr))
673 .#define bfd_coff_make_section_hook(abfd, name)\
674 . ((coff_backend_info (abfd)->_bfd_make_section_hook) (abfd, name))
676 .#define bfd_coff_set_alignment_hook(abfd, sec, scnhdr)\
677 . ((coff_backend_info (abfd)->_bfd_set_alignment_hook) (abfd, sec, scnhdr))
679 .#define bfd_coff_slurp_symbol_table(abfd)\
680 . ((coff_backend_info (abfd)->_bfd_coff_slurp_symbol_table) (abfd))
682 .#define bfd_coff_symname_in_debug(abfd, sym)\
683 . ((coff_backend_info (abfd)->_bfd_coff_symname_in_debug) (abfd, sym))
685 .#define bfd_coff_reloc16_extra_cases(abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr)\
686 . ((coff_backend_info (abfd)->_bfd_coff_reloc16_extra_cases)\
687 . (abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr))
689 .#define bfd_coff_reloc16_estimate(abfd, section, reloc, shrink, link_info)\
690 . ((coff_backend_info (abfd)->_bfd_coff_reloc16_estimate)\
691 . (abfd, section, reloc, shrink, link_info))
695 /* See whether the magic number matches. */
698 coff_bad_format_hook (abfd, filehdr)
702 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
704 if (BADMAG (*internal_f))
707 /* if the optional header is NULL or not the correct size then
708 quit; the only difference I can see between m88k dgux headers (MC88DMAGIC)
709 and Intel 960 readwrite headers (I960WRMAGIC) is that the
710 optional header is of a different size.
712 But the mips keeps extra stuff in it's opthdr, so dont check
716 #if defined(M88) || defined(I960)
717 if (internal_f->f_opthdr != 0 && AOUTSZ != internal_f->f_opthdr)
725 coff_make_section_hook (abfd, name)
730 /* FIXME: This predates the call to bfd_make_section_anyway
731 in make_a_section_from_file, and can probably go away. */
732 /* On SCO a file created by the Microsoft assembler can have two
733 .data sections. We use .data2 for the second one. */
734 if (strcmp (name, _DATA) == 0)
735 return bfd_make_section (abfd, ".data2");
737 return (asection *) NULL;
741 initialize a section structure with information peculiar to this
742 particular implementation of coff
746 coff_new_section_hook (abfd, section)
750 section->alignment_power = abfd->xvec->align_power_min;
751 /* Allocate aux records for section symbols, to store size and
754 @@ Shouldn't use constant multiplier here! */
755 coffsymbol (section->symbol)->native =
756 (combined_entry_type *) bfd_zalloc (abfd,
757 sizeof (combined_entry_type) * 10);
760 /* This is to allow double-word operations on addresses in data or bss. */
761 if (strcmp (section->name, ".data") == 0
762 || strcmp (section->name, ".bss") == 0)
763 section->alignment_power = 3;
764 #endif /* COFF_SPARC */
772 /* Set the alignment of a BFD section. */
775 coff_set_alignment_hook (abfd, section, scnhdr)
780 struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr;
783 for (i = 0; i < 32; i++)
784 if ((1 << i) >= hdr->s_align)
786 section->alignment_power = i;
791 #define coff_set_alignment_hook \
792 ((void (*) PARAMS ((bfd *, asection *, PTR))) bfd_void)
800 coff_data_type *coff;
802 abfd->tdata.coff_obj_data = (struct coff_tdata *) bfd_zalloc (abfd, sizeof (coff_data_type));
803 if (abfd->tdata.coff_obj_data == 0)
805 bfd_set_error (bfd_error_no_memory);
808 coff = coff_data (abfd);
809 coff->symbols = (coff_symbol_type *) NULL;
810 coff->conversion_table = (unsigned int *) NULL;
811 coff->raw_syments = (struct coff_ptr_struct *) NULL;
812 coff->raw_linenos = (struct lineno *) NULL;
814 /* make_abs_section(abfd);*/
818 /* Create the COFF backend specific information. */
821 coff_mkobject_hook (abfd, filehdr, aouthdr)
826 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
827 coff_data_type *coff;
829 if (coff_mkobject (abfd) == false)
832 coff = coff_data (abfd);
834 coff->sym_filepos = internal_f->f_symptr;
835 coff->flags = internal_f->f_flags;
837 /* These members communicate important constants about the symbol
838 table to GDB's symbol-reading code. These `constants'
839 unfortunately vary among coff implementations... */
840 coff->local_n_btmask = N_BTMASK;
841 coff->local_n_btshft = N_BTSHFT;
842 coff->local_n_tmask = N_TMASK;
843 coff->local_n_tshift = N_TSHIFT;
844 coff->local_symesz = SYMESZ;
845 coff->local_auxesz = AUXESZ;
846 coff->local_linesz = LINESZ;
851 /* Determine the machine architecture and type. FIXME: This is target
852 dependent because the magic numbers are defined in the target
853 dependent header files. But there is no particular need for this.
854 If the magic numbers were moved to a separate file, this function
855 would be target independent and would also be much more successful
856 at linking together COFF files for different architectures. */
859 coff_set_arch_mach_hook (abfd, filehdr)
864 enum bfd_architecture arch;
865 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
868 switch (internal_f->f_magic)
873 case I386AIXMAGIC: /* Danbury PS/2 AIX C Compiler */
874 case LYNXCOFFMAGIC: /* shadows the m68k Lynx number below, sigh */
875 arch = bfd_arch_i386;
880 #ifdef A29K_MAGIC_BIG
882 case A29K_MAGIC_LITTLE:
883 arch = bfd_arch_a29k;
894 #ifdef APOLLOM68KMAGIC
895 case APOLLOM68KMAGIC:
900 arch = bfd_arch_m68k;
908 arch = bfd_arch_m88k;
915 switch (internal_f->f_flags & F_MACHMASK)
918 machine = bfd_mach_z8001;
921 machine = bfd_mach_z8002;
932 arch = bfd_arch_i960;
933 switch (F_I960TYPE & internal_f->f_flags)
937 machine = bfd_mach_i960_core;
940 machine = bfd_mach_i960_kb_sb;
943 machine = bfd_mach_i960_mc;
946 machine = bfd_mach_i960_xa;
949 machine = bfd_mach_i960_ca;
952 machine = bfd_mach_i960_ka_sa;
963 arch = bfd_arch_rs6000;
970 arch = bfd_arch_we32k;
977 arch = bfd_arch_h8300;
978 machine = bfd_mach_h8300;
979 /* !! FIXME this probably isn't the right place for this */
980 abfd->flags |= BFD_IS_RELAXABLE;
986 arch = bfd_arch_h8300;
987 machine = bfd_mach_h8300h;
988 /* !! FIXME this probably isn't the right place for this */
989 abfd->flags |= BFD_IS_RELAXABLE;
1002 arch = bfd_arch_h8500;
1009 #ifdef LYNXCOFFMAGIC
1012 arch = bfd_arch_sparc;
1017 default: /* Unreadable input file type */
1018 arch = bfd_arch_obscure;
1022 bfd_default_set_arch_mach (abfd, arch, machine);
1026 #ifdef SYMNAME_IN_DEBUG
1029 symname_in_debug_hook (abfd, sym)
1031 struct internal_syment *sym;
1033 return SYMNAME_IN_DEBUG (sym) ? true : false;
1038 #define symname_in_debug_hook \
1039 (boolean (*) PARAMS ((bfd *, struct internal_syment *))) bfd_false
1047 To write relocations, the back end steps though the
1048 canonical relocation table and create an
1049 @code{internal_reloc}. The symbol index to use is removed from
1050 the @code{offset} field in the symbol table supplied. The
1051 address comes directly from the sum of the section base
1052 address and the relocation offset; the type is dug directly
1053 from the howto field. Then the @code{internal_reloc} is
1054 swapped into the shape of an @code{external_reloc} and written
1060 coff_write_relocs (abfd)
1064 for (s = abfd->sections; s != (asection *) NULL; s = s->next)
1067 struct external_reloc dst;
1069 arelent **p = s->orelocation;
1070 if (bfd_seek (abfd, s->rel_filepos, SEEK_SET) != 0)
1072 for (i = 0; i < s->reloc_count; i++)
1074 struct internal_reloc n;
1076 memset ((PTR) & n, 0, sizeof (n));
1078 n.r_vaddr = q->address + s->vma;
1081 /* The 29k const/consth reloc pair is a real kludge. The consth
1082 part doesn't have a symbol; it has an offset. So rebuilt
1084 if (q->howto->type == R_IHCONST)
1085 n.r_symndx = q->addend;
1090 if (q->sym_ptr_ptr == bfd_abs_section.symbol_ptr_ptr)
1091 /* This is a relocation relative to the absolute symbol. */
1095 n.r_symndx = get_index ((*(q->sym_ptr_ptr)));
1096 /* Take notice if the symbol reloc points to a symbol
1097 we don't have in our symbol table. What should we
1099 if (n.r_symndx > obj_conv_table_size (abfd))
1104 #ifdef SWAP_OUT_RELOC_OFFSET
1105 n.r_offset = q->addend;
1109 /* Work out reloc type from what is required */
1110 SELECT_RELOC (n, q->howto);
1112 n.r_type = q->howto->type;
1114 coff_swap_reloc_out (abfd, &n, &dst);
1115 if (bfd_write ((PTR) & dst, 1, RELSZ, abfd) != RELSZ)
1123 /* Set flags and magic number of a coff file from architecture and machine
1124 type. Result is true if we can represent the arch&type, false if not. */
1127 coff_set_flags (abfd, magicp, flagsp)
1130 unsigned short *flagsp;
1132 switch (bfd_get_arch (abfd))
1137 switch (bfd_get_mach (abfd))
1139 case bfd_mach_z8001:
1142 case bfd_mach_z8002:
1156 *magicp = I960ROMAGIC;
1158 ((bfd_get_file_flags(abfd) & WP_TEXT) ? I960ROMAGIC :
1159 I960RWMAGIC); FIXME???
1161 switch (bfd_get_mach (abfd))
1163 case bfd_mach_i960_core:
1166 case bfd_mach_i960_kb_sb:
1169 case bfd_mach_i960_mc:
1172 case bfd_mach_i960_xa:
1175 case bfd_mach_i960_ca:
1178 case bfd_mach_i960_ka_sa:
1191 *magicp = I386MAGIC;
1193 /* Just overwrite the usual value if we're doing Lynx. */
1194 *magicp = LYNXCOFFMAGIC;
1201 #ifdef APOLLOM68KMAGIC
1202 *magicp = APOLLO_COFF_VERSION_NUMBER;
1204 *magicp = MC68MAGIC;
1207 /* Just overwrite the usual value if we're doing Lynx. */
1208 *magicp = LYNXCOFFMAGIC;
1216 *magicp = MC88OMAGIC;
1221 case bfd_arch_h8300:
1222 switch (bfd_get_mach (abfd))
1224 case bfd_mach_h8300:
1225 *magicp = H8300MAGIC;
1227 case bfd_mach_h8300h:
1228 *magicp = H8300HMAGIC;
1234 #ifdef SH_ARCH_MAGIC
1236 *magicp = SH_ARCH_MAGIC;
1242 case bfd_arch_sparc:
1243 *magicp = SPARCMAGIC;
1245 /* Just overwrite the usual value if we're doing Lynx. */
1246 *magicp = LYNXCOFFMAGIC;
1253 case bfd_arch_h8500:
1254 *magicp = H8500MAGIC;
1258 #ifdef A29K_MAGIC_BIG
1260 if (abfd->xvec->byteorder_big_p)
1261 *magicp = A29K_MAGIC_BIG;
1263 *magicp = A29K_MAGIC_LITTLE;
1269 case bfd_arch_we32k:
1270 *magicp = WE32KMAGIC;
1276 case bfd_arch_rs6000:
1277 case bfd_arch_powerpc:
1278 *magicp = U802TOCMAGIC;
1283 default: /* Unknown architecture */
1284 /* return false; -- fall through to "return false" below, to avoid
1285 "statement never reached" errors on the one below. */
1294 coff_set_arch_mach (abfd, arch, machine)
1296 enum bfd_architecture arch;
1297 unsigned long machine;
1300 unsigned short dummy2;
1302 if (! bfd_default_set_arch_mach (abfd, arch, machine))
1305 if (arch != bfd_arch_unknown &&
1306 coff_set_flags (abfd, &dummy1, &dummy2) != true)
1307 return false; /* We can't represent this type */
1309 return true; /* We're easy ... */
1313 /* Calculate the file position for each section. */
1316 coff_compute_section_file_positions (abfd)
1320 asection *previous = (asection *) NULL;
1321 file_ptr sofar = FILHSZ;
1325 if (bfd_get_start_address (abfd))
1327 /* A start address may have been added to the original file. In this
1328 case it will need an optional header to record it. */
1329 abfd->flags |= EXEC_P;
1332 if (abfd->flags & EXEC_P)
1335 sofar += abfd->section_count * SCNHSZ;
1336 for (current = abfd->sections;
1337 current != (asection *) NULL;
1338 current = current->next)
1341 /* Only deal with sections which have contents */
1342 if (!(current->flags & SEC_HAS_CONTENTS))
1345 /* Align the sections in the file to the same boundary on
1346 which they are aligned in virtual memory. I960 doesn't
1347 do this (FIXME) so we can stay in sync with Intel. 960
1348 doesn't yet page from files... */
1351 /* make sure this section is aligned on the right boundary - by
1352 padding the previous section up if necessary */
1355 sofar = BFD_ALIGN (sofar, 1 << current->alignment_power);
1356 if (previous != (asection *) NULL)
1358 previous->_raw_size += sofar - old_sofar;
1363 /* FIXME, in demand paged files, the low order bits of the file
1364 offset must match the low order bits of the virtual address.
1365 "Low order" is apparently implementation defined. Add code
1366 here to round sofar up to match the virtual address. */
1368 current->filepos = sofar;
1370 sofar += current->_raw_size;
1372 /* make sure that this section is of the right size too */
1374 sofar = BFD_ALIGN (sofar, 1 << current->alignment_power);
1375 current->_raw_size += sofar - old_sofar;
1379 /* Force .lib sections to start at zero. The vma is then
1380 incremented in coff_set_section_contents. This is right for
1382 if (strcmp (current->name, _LIB) == 0)
1383 bfd_set_section_vma (abfd, current, 0);
1388 obj_relocbase (abfd) = sofar;
1391 #ifndef RS6000COFF_C
1393 /* If .file, .text, .data, .bss symbols are missing, add them. */
1394 /* @@ Should we only be adding missing symbols, or overriding the aux
1395 values for existing section symbols? */
1397 coff_add_missing_symbols (abfd)
1400 unsigned int nsyms = bfd_get_symcount (abfd);
1401 asymbol **sympp = abfd->outsymbols;
1404 int need_text = 1, need_data = 1, need_bss = 1, need_file = 1;
1406 for (i = 0; i < nsyms; i++)
1408 coff_symbol_type *csym = coff_symbol_from (abfd, sympp[i]);
1412 /* only do this if there is a coff representation of the input
1414 if (csym->native && csym->native->u.syment.n_sclass == C_FILE)
1419 name = csym->symbol.name;
1422 if (!strcmp (name, _TEXT))
1425 else if (!strcmp (name, ".wtext"))
1428 else if (!strcmp (name, _DATA))
1430 else if (!strcmp (name, _BSS))
1434 /* Now i == bfd_get_symcount (abfd). */
1435 /* @@ For now, don't deal with .file symbol. */
1438 if (!need_text && !need_data && !need_bss && !need_file)
1440 nsyms += need_text + need_data + need_bss + need_file;
1441 sympp2 = (asymbol **) bfd_alloc_by_size_t (abfd, nsyms * sizeof (asymbol *));
1444 bfd_set_error (bfd_error_no_memory);
1447 memcpy (sympp2, sympp, i * sizeof (asymbol *));
1450 /* @@ Generate fake .file symbol, in sympp2[i], and increment i. */
1454 sympp2[i++] = coff_section_symbol (abfd, _TEXT);
1456 sympp2[i++] = coff_section_symbol (abfd, _DATA);
1458 sympp2[i++] = coff_section_symbol (abfd, _BSS);
1459 BFD_ASSERT (i == nsyms);
1460 bfd_set_symtab (abfd, sympp2, nsyms);
1464 #endif /* ! defined (RS6000COFF_C) */
1469 coff_write_object_contents (abfd)
1475 boolean hasrelocs = false;
1476 boolean haslinno = false;
1477 file_ptr reloc_base;
1478 file_ptr lineno_base;
1482 unsigned long reloc_size = 0;
1483 unsigned long lnno_size = 0;
1484 asection *text_sec = NULL;
1485 asection *data_sec = NULL;
1486 asection *bss_sec = NULL;
1488 struct internal_filehdr internal_f;
1489 struct internal_aouthdr internal_a;
1492 bfd_set_error (bfd_error_system_call);
1493 /* Number the output sections, starting from one on the first section
1494 with a name which doesn't start with a *.
1495 @@ The code doesn't make this check. Is it supposed to be done,
1498 for (current = abfd->sections; current != (asection *) NULL;
1499 current = current->next)
1501 current->target_index = count;
1505 if (abfd->output_has_begun == false)
1507 coff_compute_section_file_positions (abfd);
1510 if (abfd->sections != (asection *) NULL)
1512 scn_base = abfd->sections->filepos;
1518 if (bfd_seek (abfd, scn_base, SEEK_SET) != 0)
1520 reloc_base = obj_relocbase (abfd);
1522 /* Make a pass through the symbol table to count line number entries and
1523 put them into the correct asections */
1525 lnno_size = coff_count_linenumbers (abfd) * LINESZ;
1526 data_base = scn_base;
1528 /* Work out the size of the reloc and linno areas */
1530 for (current = abfd->sections; current != NULL; current =
1533 /* We give section headers to +ve indexes */
1534 if (current->target_index > 0)
1537 reloc_size += current->reloc_count * RELSZ;
1538 data_base += SCNHSZ;
1543 lineno_base = reloc_base + reloc_size;
1544 sym_base = lineno_base + lnno_size;
1546 /* Indicate in each section->line_filepos its actual file address */
1547 for (current = abfd->sections; current != NULL; current =
1550 if (current->target_index > 0)
1553 if (current->lineno_count)
1555 current->line_filepos = lineno_base;
1556 current->moving_line_filepos = lineno_base;
1557 lineno_base += current->lineno_count * LINESZ;
1561 current->line_filepos = 0;
1563 if (current->reloc_count)
1565 current->rel_filepos = reloc_base;
1566 reloc_base += current->reloc_count * RELSZ;
1570 current->rel_filepos = 0;
1577 /* Write section headers to the file. */
1578 internal_f.f_nscns = 0;
1580 (file_ptr) ((abfd->flags & EXEC_P) ?
1581 (FILHSZ + AOUTSZ) : FILHSZ),
1588 unsigned int pad = abfd->flags & D_PAGED ? data_base : 0;
1590 unsigned int pad = 0;
1592 for (current = abfd->sections;
1594 current = current->next)
1596 struct internal_scnhdr section;
1597 if (current->target_index > 0)
1599 internal_f.f_nscns++;
1600 strncpy (&(section.s_name[0]), current->name, 8);
1602 /* Always set s_vaddr of .lib to 0. This is right for SVR3.2
1604 if (strcmp (current->name, _LIB) == 0)
1605 section.s_vaddr = 0;
1608 section.s_vaddr = current->lma + pad;
1609 section.s_paddr = current->lma + pad;
1610 section.s_size = current->_raw_size - pad;
1612 If this section has no size or is unloadable then the scnptr
1615 if (current->_raw_size - pad == 0 ||
1616 (current->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0)
1618 section.s_scnptr = 0;
1622 section.s_scnptr = current->filepos;
1624 section.s_relptr = current->rel_filepos;
1625 section.s_lnnoptr = current->line_filepos;
1626 section.s_nreloc = current->reloc_count;
1627 section.s_nlnno = current->lineno_count;
1628 if (current->reloc_count != 0)
1630 if (current->lineno_count != 0)
1633 section.s_flags = sec_to_styp_flags (current->name, current->flags);
1635 if (!strcmp (current->name, _TEXT))
1639 else if (!strcmp (current->name, _DATA))
1642 #ifdef TWO_DATA_SECS
1644 else if (!strcmp (current->name, ".data2"))
1647 #endif /* TWO_DATA_SECS */
1649 else if (!strcmp (current->name, _BSS))
1655 section.s_align = (current->alignment_power
1656 ? 1 << current->alignment_power
1663 coff_swap_scnhdr_out (abfd, §ion, &buff);
1664 if (bfd_write ((PTR) (&buff), 1, SCNHSZ, abfd) != SCNHSZ)
1675 /* OK, now set up the filehdr... */
1677 /* Don't include the internal abs section in the section count */
1680 We will NOT put a fucking timestamp in the header here. Every time you
1681 put it back, I will come in and take it out again. I'm sorry. This
1682 field does not belong here. We fill it with a 0 so it compares the
1685 internal_f.f_timdat = 0;
1687 if (bfd_get_symcount (abfd) != 0)
1688 internal_f.f_symptr = sym_base;
1690 internal_f.f_symptr = 0;
1692 internal_f.f_flags = 0;
1694 if (abfd->flags & EXEC_P)
1695 internal_f.f_opthdr = AOUTSZ;
1697 internal_f.f_opthdr = 0;
1700 internal_f.f_flags |= F_RELFLG;
1702 internal_f.f_flags |= F_LNNO;
1703 if (0 == bfd_get_symcount (abfd))
1704 internal_f.f_flags |= F_LSYMS;
1705 if (abfd->flags & EXEC_P)
1706 internal_f.f_flags |= F_EXEC;
1708 if (!abfd->xvec->byteorder_big_p)
1709 internal_f.f_flags |= F_AR32WR;
1711 internal_f.f_flags |= F_AR32W;
1714 FIXME, should do something about the other byte orders and
1718 memset (&internal_a, 0, sizeof internal_a);
1720 /* Set up architecture-dependent stuff */
1723 unsigned int magic = 0;
1724 unsigned short flags = 0;
1725 coff_set_flags (abfd, &magic, &flags);
1726 internal_f.f_magic = magic;
1727 internal_f.f_flags |= flags;
1728 /* ...and the "opt"hdr... */
1731 #ifdef ULTRA3 /* NYU's machine */
1732 /* FIXME: This is a bogus check. I really want to see if there
1733 * is a .shbss or a .shdata section, if so then set the magic
1734 * number to indicate a shared data executable.
1736 if (internal_f.f_nscns >= 7)
1737 internal_a.magic = SHMAGIC; /* Shared magic */
1740 internal_a.magic = NMAGIC;/* Assume separate i/d */
1741 #define __A_MAGIC_SET__
1744 internal_a.magic = (magic == I960ROMAGIC ? NMAGIC : OMAGIC);
1745 #define __A_MAGIC_SET__
1748 #define __A_MAGIC_SET__
1749 internal_a.magic = PAGEMAGICBCS;
1753 #define __A_MAGIC_SET__
1754 internal_a.magic = APOLLO_COFF_VERSION_NUMBER;
1758 #define __A_MAGIC_SET__
1759 /* Never was anything here for the 68k */
1760 #endif /* M68 || WE32K */
1763 #define __A_MAGIC_SET__
1764 internal_a.magic = ZMAGIC;
1768 #define __A_MAGIC_SET__
1769 internal_a.magic = (abfd->flags & D_PAGED) ? RS6K_AOUTHDR_ZMAGIC :
1770 (abfd->flags & WP_TEXT) ? RS6K_AOUTHDR_NMAGIC :
1771 RS6K_AOUTHDR_OMAGIC;
1774 #ifndef __A_MAGIC_SET__
1775 #include "Your aouthdr magic number is not being set!"
1777 #undef __A_MAGIC_SET__
1780 /* Now should write relocs, strings, syms */
1781 obj_sym_filepos (abfd) = sym_base;
1783 if (bfd_get_symcount (abfd) != 0)
1785 #ifndef RS6000COFF_C
1786 if (!coff_add_missing_symbols (abfd))
1789 if (!coff_renumber_symbols (abfd))
1791 coff_mangle_symbols (abfd);
1792 if (! coff_write_symbols (abfd))
1794 if (! coff_write_linenumbers (abfd))
1796 if (! coff_write_relocs (abfd))
1801 internal_a.tsize = bfd_get_section_size_before_reloc (text_sec);
1802 internal_a.text_start = internal_a.tsize ? text_sec->vma : 0;
1806 internal_a.dsize = bfd_get_section_size_before_reloc (data_sec);
1807 internal_a.data_start = internal_a.dsize ? data_sec->vma : 0;
1811 internal_a.bsize = bfd_get_section_size_before_reloc (bss_sec);
1814 internal_a.entry = bfd_get_start_address (abfd);
1815 internal_f.f_nsyms = bfd_get_symcount (abfd);
1817 /* now write them */
1818 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
1822 coff_swap_filehdr_out (abfd, (PTR) & internal_f, (PTR) & buff);
1823 if (bfd_write ((PTR) & buff, 1, FILHSZ, abfd) != FILHSZ)
1826 if (abfd->flags & EXEC_P)
1829 coff_swap_aouthdr_out (abfd, (PTR) & internal_a, (PTR) & buff);
1830 if (bfd_write ((PTR) & buff, 1, AOUTSZ, abfd) != AOUTSZ)
1837 coff_set_section_contents (abfd, section, location, offset, count)
1842 bfd_size_type count;
1844 if (abfd->output_has_begun == false) /* set by bfd.c handler */
1845 coff_compute_section_file_positions (abfd);
1848 /* If this is a .lib section, bump the vma address so that it
1849 winds up being the number of .lib sections output. This is
1850 right for SVR3.2. Shared libraries should probably get more
1852 if (strcmp (section->name, _LIB) == 0)
1856 /* Don't write out bss sections - one way to do this is to
1857 see if the filepos has not been set. */
1858 if (section->filepos == 0)
1861 if (bfd_seek (abfd, (file_ptr) (section->filepos + offset), SEEK_SET) != 0)
1866 return (bfd_write (location, 1, count, abfd) == count) ? true : false;
1872 coff_close_and_cleanup (abfd)
1875 if (!bfd_read_p (abfd))
1876 switch (abfd->format)
1879 if (!_bfd_write_archive_contents (abfd))
1883 if (!coff_write_object_contents (abfd))
1887 bfd_set_error (bfd_error_invalid_operation);
1891 /* We depend on bfd_close to free all the memory on the obstack. */
1892 /* FIXME if bfd_release is not using obstacks! */
1899 buy_and_read (abfd, where, seek_direction, size)
1905 PTR area = (PTR) bfd_alloc (abfd, size);
1908 bfd_set_error (bfd_error_no_memory);
1911 if (bfd_seek (abfd, where, seek_direction) != 0
1912 || bfd_read (area, 1, size, abfd) != size)
1915 } /* buy_and_read() */
1921 Creating the linenumber table is done by reading in the entire
1922 coff linenumber table, and creating another table for internal use.
1924 A coff linenumber table is structured so that each function
1925 is marked as having a line number of 0. Each line within the
1926 function is an offset from the first line in the function. The
1927 base of the line number information for the table is stored in
1928 the symbol associated with the function.
1930 The information is copied from the external to the internal
1931 table, and each symbol which marks a function is marked by
1934 How does this work ?
1939 coff_slurp_line_table (abfd, asect)
1943 LINENO *native_lineno;
1944 alent *lineno_cache;
1946 BFD_ASSERT (asect->lineno == (alent *) NULL);
1948 native_lineno = (LINENO *) buy_and_read (abfd,
1949 asect->line_filepos,
1952 asect->lineno_count));
1954 (alent *) bfd_alloc (abfd, (size_t) ((asect->lineno_count + 1) * sizeof (alent)));
1955 if (lineno_cache == NULL)
1957 bfd_set_error (bfd_error_no_memory);
1962 unsigned int counter = 0;
1963 alent *cache_ptr = lineno_cache;
1964 LINENO *src = native_lineno;
1966 while (counter < asect->lineno_count)
1968 struct internal_lineno dst;
1969 coff_swap_lineno_in (abfd, src, &dst);
1970 cache_ptr->line_number = dst.l_lnno;
1972 if (cache_ptr->line_number == 0)
1974 coff_symbol_type *sym =
1975 (coff_symbol_type *) (dst.l_addr.l_symndx
1976 + obj_raw_syments (abfd))->u.syment._n._n_n._n_zeroes;
1977 cache_ptr->u.sym = (asymbol *) sym;
1978 sym->lineno = cache_ptr;
1982 cache_ptr->u.offset = dst.l_addr.l_paddr
1983 - bfd_section_vma (abfd, asect);
1984 } /* If no linenumber expect a symbol index */
1990 cache_ptr->line_number = 0;
1993 asect->lineno = lineno_cache;
1994 /* FIXME, free native_lineno here, or use alloca or something. */
1999 coff_slurp_symbol_table (abfd)
2002 combined_entry_type *native_symbols;
2003 coff_symbol_type *cached_area;
2004 unsigned int *table_ptr;
2006 unsigned int number_of_symbols = 0;
2007 if (obj_symbols (abfd))
2009 if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0)
2012 /* Read in the symbol table */
2013 if ((native_symbols = coff_get_normalized_symtab (abfd)) == NULL)
2018 /* Allocate enough room for all the symbols in cached form */
2020 (coff_symbol_type *)
2021 bfd_alloc (abfd, (size_t) (bfd_get_symcount (abfd) * sizeof (coff_symbol_type)));
2023 if (cached_area == NULL)
2025 bfd_set_error (bfd_error_no_memory);
2030 bfd_alloc (abfd, (size_t) (bfd_get_symcount (abfd) * sizeof (unsigned int)));
2032 if (table_ptr == NULL)
2034 bfd_set_error (bfd_error_no_memory);
2039 coff_symbol_type *dst = cached_area;
2040 unsigned int last_native_index = bfd_get_symcount (abfd);
2041 unsigned int this_index = 0;
2042 while (this_index < last_native_index)
2044 combined_entry_type *src = native_symbols + this_index;
2045 table_ptr[this_index] = number_of_symbols;
2046 dst->symbol.the_bfd = abfd;
2048 dst->symbol.name = (char *) (src->u.syment._n._n_n._n_offset);
2049 /* We use the native name field to point to the cached field. */
2050 src->u.syment._n._n_n._n_zeroes = (long) dst;
2051 dst->symbol.section = coff_section_from_bfd_index (abfd,
2052 src->u.syment.n_scnum);
2053 dst->symbol.flags = 0;
2054 dst->done_lineno = false;
2056 switch (src->u.syment.n_sclass)
2061 dst->symbol.value = src->u.syment.n_value - dst->symbol.section->vma;
2062 dst->symbol.flags = BSF_EXPORT | BSF_GLOBAL;
2063 dst->symbol.flags |= BSF_NOT_AT_END;
2065 /* Fall through to next case */
2073 if ((src->u.syment.n_scnum) == 0)
2075 if ((src->u.syment.n_value) == 0)
2077 dst->symbol.section = &bfd_und_section;
2078 dst->symbol.value = 0;
2082 dst->symbol.section = &bfd_com_section;
2083 dst->symbol.value = (src->u.syment.n_value);
2089 Base the value as an index from the base of the
2093 dst->symbol.flags = BSF_EXPORT | BSF_GLOBAL;
2094 dst->symbol.value = src->u.syment.n_value - dst->symbol.section->vma;
2096 if (ISFCN ((src->u.syment.n_type)))
2099 A function ext does not go at the end of a file
2101 dst->symbol.flags |= BSF_NOT_AT_END;
2106 /* If this symbol has a csect aux of type LD, the scnlen field
2107 is actually the index of the containing csect symbol. We
2108 need to pointerize it. */
2109 if (src->u.syment.n_numaux > 0)
2111 combined_entry_type *aux;
2113 aux = src + src->u.syment.n_numaux - 1;
2114 if (SMTYP_SMTYP (aux->u.auxent.x_csect.x_smtyp) == XTY_LD)
2116 aux->u.auxent.x_csect.x_scnlen.p =
2117 native_symbols + aux->u.auxent.x_csect.x_scnlen.l;
2118 aux->fix_scnlen = 1;
2125 case C_STAT: /* static */
2127 case C_LEAFSTAT: /* static leaf procedure */
2129 case C_LABEL: /* label */
2130 if (src->u.syment.n_scnum == -2)
2131 dst->symbol.flags = BSF_DEBUGGING;
2133 dst->symbol.flags = BSF_LOCAL;
2135 Base the value as an index from the base of the section, if
2138 if (dst->symbol.section)
2139 dst->symbol.value = (src->u.syment.n_value) -
2140 dst->symbol.section->vma;
2142 dst->symbol.value = (src->u.syment.n_value);
2145 case C_MOS: /* member of structure */
2146 case C_EOS: /* end of structure */
2147 #ifdef NOTDEF /* C_AUTOARG has the same value */
2149 case C_GLBLREG: /* A29k-specific storage class */
2152 case C_REGPARM: /* register parameter */
2153 case C_REG: /* register variable */
2155 case C_AUTOARG: /* 960-specific storage class */
2157 case C_TPDEF: /* type definition */
2159 case C_AUTO: /* automatic variable */
2160 case C_FIELD: /* bit field */
2161 case C_ENTAG: /* enumeration tag */
2162 case C_MOE: /* member of enumeration */
2163 case C_MOU: /* member of union */
2164 case C_UNTAG: /* union tag */
2165 dst->symbol.flags = BSF_DEBUGGING;
2166 dst->symbol.value = (src->u.syment.n_value);
2169 case C_FILE: /* file name */
2170 case C_STRTAG: /* structure tag */
2172 case C_BINCL: /* beginning of include file */
2173 case C_EINCL: /* ending of include file */
2185 dst->symbol.flags = BSF_DEBUGGING;
2186 dst->symbol.value = (src->u.syment.n_value);
2191 dst->symbol.flags = BSF_DEBUGGING;
2192 dst->symbol.value = src->u.syment.n_value;
2194 /* The value is actually a symbol index. Save a pointer to
2195 the symbol instead of the index. FIXME: This should use a
2197 src->u.syment.n_value =
2198 (long) (native_symbols + src->u.syment.n_value);
2203 case C_BLOCK: /* ".bb" or ".eb" */
2204 case C_FCN: /* ".bf" or ".ef" */
2205 case C_EFCN: /* physical end of function */
2206 dst->symbol.flags = BSF_LOCAL;
2208 Base the value as an index from the base of the section
2210 dst->symbol.value = (src->u.syment.n_value) - dst->symbol.section->vma;
2214 case C_EXTDEF: /* external definition */
2215 case C_ULABEL: /* undefined label */
2216 case C_USTATIC: /* undefined static */
2217 case C_LINE: /* line # reformatted as symbol table entry */
2218 case C_ALIAS: /* duplicate tag */
2219 case C_HIDDEN: /* ext symbol in dmert public lib */
2222 fprintf (stderr, "Unrecognized storage class %d (assuming debugging)\n for %s symbol `%s'\n",
2223 src->u.syment.n_sclass, dst->symbol.section->name,
2226 dst->symbol.flags = BSF_DEBUGGING;
2227 dst->symbol.value = (src->u.syment.n_value);
2231 /* BFD_ASSERT(dst->symbol.flags != 0);*/
2235 dst->symbol.udata = 0;
2236 dst->lineno = (alent *) NULL;
2237 this_index += (src->u.syment.n_numaux) + 1;
2239 number_of_symbols++;
2240 } /* walk the native symtab */
2241 } /* bfdize the native symtab */
2243 obj_symbols (abfd) = cached_area;
2244 obj_raw_syments (abfd) = native_symbols;
2246 obj_conv_table_size (abfd) = bfd_get_symcount (abfd);
2247 bfd_get_symcount (abfd) = number_of_symbols;
2248 obj_convert (abfd) = table_ptr;
2249 /* Slurp the line tables for each section too */
2255 coff_slurp_line_table (abfd, p);
2260 } /* coff_slurp_symbol_table() */
2266 Coff relocations are easily transformed into the internal BFD form
2269 Reading a coff relocation table is done in the following stages:
2271 o Read the entire coff relocation table into memory.
2273 o Process each relocation in turn; first swap it from the
2274 external to the internal form.
2276 o Turn the symbol referenced in the relocation's symbol index
2277 into a pointer into the canonical symbol table.
2278 This table is the same as the one returned by a call to
2279 @code{bfd_canonicalize_symtab}. The back end will call that
2280 routine and save the result if a canonicalization hasn't been done.
2282 o The reloc index is turned into a pointer to a howto
2283 structure, in a back end specific way. For instance, the 386
2284 and 960 use the @code{r_type} to directly produce an index
2285 into a howto table vector; the 88k subtracts a number from the
2286 @code{r_type} field and creates an addend field.
2292 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
2294 coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \
2295 if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
2296 coffsym = (obj_symbols (abfd) \
2297 + (cache_ptr->sym_ptr_ptr - symbols)); \
2299 coffsym = coff_symbol_from (abfd, ptr); \
2300 if (coffsym != (coff_symbol_type *) NULL \
2301 && coffsym->native->u.syment.n_scnum == 0) \
2302 cache_ptr->addend = 0; \
2303 else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
2304 && ptr->section != (asection *) NULL) \
2305 cache_ptr->addend = - (ptr->section->vma + ptr->value); \
2307 cache_ptr->addend = 0; \
2312 coff_slurp_reloc_table (abfd, asect, symbols)
2317 RELOC *native_relocs;
2318 arelent *reloc_cache;
2323 if (asect->relocation)
2325 if (asect->reloc_count == 0)
2327 if (asect->flags & SEC_CONSTRUCTOR)
2329 if (!coff_slurp_symbol_table (abfd))
2332 (RELOC *) buy_and_read (abfd,
2336 asect->reloc_count));
2337 reloc_cache = (arelent *)
2338 bfd_alloc (abfd, (size_t) (asect->reloc_count * sizeof (arelent)));
2340 if (reloc_cache == NULL)
2342 bfd_set_error (bfd_error_no_memory);
2347 for (idx = 0; idx < asect->reloc_count; idx++)
2349 #ifdef RELOC_PROCESSING
2350 struct internal_reloc dst;
2351 struct external_reloc *src;
2353 cache_ptr = reloc_cache + idx;
2354 src = native_relocs + idx;
2355 bfd_swap_reloc_in (abfd, src, &dst);
2357 RELOC_PROCESSING (cache_ptr, &dst, symbols, abfd, asect);
2359 struct internal_reloc dst;
2361 struct external_reloc *src;
2363 cache_ptr = reloc_cache + idx;
2364 src = native_relocs + idx;
2366 bfd_swap_reloc_in (abfd, src, &dst);
2369 cache_ptr->address = dst.r_vaddr;
2371 if (dst.r_symndx != -1)
2373 /* @@ Should never be greater than count of symbols! */
2374 if (dst.r_symndx >= obj_conv_table_size (abfd))
2376 cache_ptr->sym_ptr_ptr = symbols + obj_convert (abfd)[dst.r_symndx];
2377 ptr = *(cache_ptr->sym_ptr_ptr);
2381 cache_ptr->sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr;
2385 /* The symbols definitions that we have read in have been
2386 relocated as if their sections started at 0. But the offsets
2387 refering to the symbols in the raw data have not been
2388 modified, so we have to have a negative addend to compensate.
2390 Note that symbols which used to be common must be left alone */
2392 /* Calculate any reloc addend by looking at the symbol */
2393 CALC_ADDEND (abfd, ptr, dst, cache_ptr);
2395 cache_ptr->address -= asect->vma;
2396 /* !! cache_ptr->section = (asection *) NULL;*/
2398 /* Fill in the cache_ptr->howto field from dst.r_type */
2399 RTYPE2HOWTO (cache_ptr, &dst);
2404 asect->relocation = reloc_cache;
2409 /* This is stupid. This function should be a boolean predicate. */
2411 coff_canonicalize_reloc (abfd, section, relptr, symbols)
2417 arelent *tblptr = section->relocation;
2418 unsigned int count = 0;
2421 if (section->flags & SEC_CONSTRUCTOR)
2423 /* this section has relocs made up by us, they are not in the
2424 file, so take them out of their chain and place them into
2425 the data area provided */
2426 arelent_chain *chain = section->constructor_chain;
2427 for (count = 0; count < section->reloc_count; count++)
2429 *relptr++ = &chain->relent;
2430 chain = chain->next;
2436 if (! coff_slurp_reloc_table (abfd, section, symbols))
2439 tblptr = section->relocation;
2441 for (; count++ < section->reloc_count;)
2442 *relptr++ = tblptr++;
2447 return section->reloc_count;
2452 coff_sym_filepos (abfd)
2455 return obj_sym_filepos (abfd);
2459 #ifndef coff_reloc16_estimate
2460 #define coff_reloc16_estimate dummy_reloc16_estimate
2463 dummy_reloc16_estimate (abfd, input_section, reloc, shrink, link_info)
2465 asection *input_section;
2467 unsigned int shrink;
2468 struct bfd_link_info *link_info;
2475 #ifndef coff_reloc16_extra_cases
2476 #define coff_reloc16_extra_cases dummy_reloc16_extra_cases
2477 /* This works even if abort is not declared in any header file. */
2479 dummy_reloc16_extra_cases (abfd, link_info, link_order, reloc, data, src_ptr,
2482 struct bfd_link_info *link_info;
2483 struct bfd_link_order *link_order;
2486 unsigned int *src_ptr;
2487 unsigned int *dst_ptr;
2489 fprintf (stderr, "%s\n", reloc->howto->name);
2494 static CONST bfd_coff_backend_data bfd_coff_std_swap_table =
2496 coff_swap_aux_in, coff_swap_sym_in, coff_swap_lineno_in,
2497 coff_swap_aux_out, coff_swap_sym_out,
2498 coff_swap_lineno_out, coff_swap_reloc_out,
2499 coff_swap_filehdr_out, coff_swap_aouthdr_out,
2500 coff_swap_scnhdr_out,
2501 FILHSZ, AOUTSZ, SCNHSZ, SYMESZ, AUXESZ, LINESZ,
2502 #ifdef COFF_LONG_FILENAMES
2507 coff_swap_filehdr_in, coff_swap_aouthdr_in, coff_swap_scnhdr_in,
2508 coff_bad_format_hook, coff_set_arch_mach_hook, coff_mkobject_hook,
2509 styp_to_sec_flags, coff_make_section_hook, coff_set_alignment_hook,
2510 coff_slurp_symbol_table, symname_in_debug_hook,
2511 coff_reloc16_extra_cases, coff_reloc16_estimate
2514 #define coff_close_and_cleanup _bfd_generic_close_and_cleanup
2515 #define coff_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
2516 #define coff_get_section_contents _bfd_generic_get_section_contents
2518 #define coff_bfd_copy_private_section_data \
2519 _bfd_generic_bfd_copy_private_section_data
2520 #define coff_bfd_copy_private_bfd_data _bfd_generic_bfd_copy_private_bfd_data
2522 #ifndef coff_bfd_is_local_label
2523 #define coff_bfd_is_local_label bfd_generic_is_local_label
2526 /* The reloc lookup routine must be supplied by each individual COFF
2528 #ifndef coff_bfd_reloc_type_lookup
2529 #define coff_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
2532 #define coff_bfd_get_relocated_section_contents \
2533 bfd_generic_get_relocated_section_contents
2534 #define coff_bfd_relax_section bfd_generic_relax_section
2535 #define coff_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
2536 #define coff_bfd_link_add_symbols _bfd_generic_link_add_symbols
2537 #define coff_bfd_final_link _bfd_generic_final_link