1 /* Support for the generic parts of most COFF variants, for BFD.
2 Copyright 1990, 1991, 1992, 1993 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 difference between formats are the sizes and
32 alignments of fields in structures on disk, and the occasional
35 Coff in all its varieties is implimented 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 @code{coff-m88k.c}. This file @code{#include}s
39 @code{coff/m88k.h} which defines the external structure of the
40 coff format for the 88k, and @code{coff/internal.h} which
41 defines the internal structure. @code{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 @code{coff-i960.c}. This file has the same structure as
47 @code{coff-m88k.c}, except that it includes @code{coff/i960.h}
48 rather than @code{coff-m88k.h}.
51 Porting To A New Version of Coff
53 The recommended method is to select from the existing
54 implimentations the version of coff which is most like the one
55 you want to use, for our purposes, we'll say that i386 coff is
56 the one you select, and that your coff flavour is called foo.
57 Copy the @code{i386coff.c} to @code{foocoff.c}, copy
58 @code{../include/coff/i386.h} to @code{../include/coff/foo.h}
59 and add the lines to @code{targets.c} and @code{Makefile.in}
60 so that your new back end is used. Alter the shapes of the
61 structures in @code{../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 @code{coff/internal.h} and
64 @code{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 @code{objdump} from the @code{binutils} directory,
68 and making sure that its version of what's going on at your
69 host systems 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 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 descibing the external layout of the structures. There is also
116 an internal description of the coff layout (in
117 @code{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 @code{coffcode.h}. Eg 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 for 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. This 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 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 changes 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 in 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 was born, and on output
194 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. Note that 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 to an index into the symbol table of the symbol
233 This routine runs through the symbol table and patches up the
234 symbols from their internal form into the coff way, calls the
235 bit twiddlers and writes out the tabel to the file.
244 The hidden information for an asymbol is described in a
245 coff_ptr_struct, which is typedefed to a combined_entry_type
249 .typedef struct coff_ptr_struct
252 . {* Remembers the offset from the first symbol in the file for
253 . this symbol. Generated by coff_renumber_symbols. *}
254 .unsigned int offset;
256 . {* Should the tag field of this symbol be renumbered.
257 . Created by coff_pointerize_aux. *}
260 . {* Should the endidx field of this symbol be renumbered.
261 . Created by coff_pointerize_aux. *}
264 . {* The container for the symbol structure as read and translated
268 . union internal_auxent auxent;
269 . struct internal_syment syment;
271 .} combined_entry_type;
274 .{* Each canonical asymbol really looks like this: *}
276 .typedef struct coff_symbol_struct
278 . {* The actual symbol which the rest of BFD works with *}
281 . {* A pointer to the hidden information for this symbol *}
282 .combined_entry_type *native;
284 . {* A pointer to the linenumber information for this symbol *}
285 .struct lineno_cache_entry *lineno;
287 . {* Have the line numbers been relocated yet ? *}
288 .boolean done_lineno;
295 #include "coffswap.h"
297 /* void warning(); */
300 * Return a word with STYP_* (scnhdr.s_flags) flags set to represent the
301 * incoming SEC_* flags. The inverse of this function is styp_to_sec_flags().
302 * NOTE: If you add to/change this routine, you should mirror the changes
303 * in styp_to_sec_flags().
306 sec_to_styp_flags (sec_name, sec_flags)
307 CONST char *sec_name;
312 if (!strcmp(sec_name, _TEXT))
314 styp_flags = STYP_TEXT;
316 else if (!strcmp(sec_name, _DATA))
318 styp_flags = STYP_DATA;
321 else if (!strcmp(sec_name, ".data2"))
323 styp_flags = STYP_DATA;
324 #endif /* TWO_DATA_SECS */
326 else if (!strcmp(sec_name, _BSS))
328 styp_flags = STYP_BSS;
331 else if (!strcmp(sec_name, _COMMENT))
333 styp_flags = STYP_INFO;
334 #endif /* _COMMENT */
337 else if (!strcmp(sec_name, _LIB))
339 styp_flags = STYP_LIB;
343 else if (!strcmp (sec_name, _LIT))
345 styp_flags = STYP_LIT;
348 else if (!strcmp(sec_name, ".debug"))
350 styp_flags = STYP_INFO;
352 else if (!strcmp(sec_name, ".stab")
353 || !strncmp(sec_name, ".stabstr", 8))
355 styp_flags = STYP_INFO;
357 /* Try and figure out what it should be */
358 else if (sec_flags & SEC_CODE)
360 styp_flags = STYP_TEXT;
362 else if (sec_flags & SEC_DATA)
364 styp_flags = STYP_DATA;
366 else if (sec_flags & SEC_READONLY)
368 #ifdef STYP_LIT /* 29k readonly text/data section */
369 styp_flags = STYP_LIT;
371 styp_flags = STYP_TEXT;
372 #endif /* STYP_LIT */
374 else if (sec_flags & SEC_LOAD)
376 styp_flags = STYP_TEXT;
378 else if (sec_flags & SEC_ALLOC)
380 styp_flags = STYP_BSS;
384 if (sec_flags & SEC_NEVER_LOAD)
385 styp_flags |= STYP_NOLOAD;
391 * Return a word with SEC_* flags set to represent the incoming
392 * STYP_* flags (from scnhdr.s_flags). The inverse of this
393 * function is sec_to_styp_flags().
394 * NOTE: If you add to/change this routine, you should mirror the changes
395 * in sec_to_styp_flags().
398 DEFUN(styp_to_sec_flags, (abfd, hdr),
402 struct internal_scnhdr *internal_s = (struct internal_scnhdr *) hdr;
403 long styp_flags = internal_s->s_flags;
404 flagword sec_flags=0;
407 if (styp_flags & STYP_NOLOAD)
409 sec_flags |= SEC_NEVER_LOAD;
411 #endif /* STYP_NOLOAD */
413 /* For 386 COFF, at least, an unloadable text or data section is
414 actually a shared library section. */
415 if (styp_flags & STYP_TEXT)
417 if (sec_flags & SEC_NEVER_LOAD)
418 sec_flags |= SEC_CODE | SEC_SHARED_LIBRARY;
420 sec_flags |= SEC_CODE | SEC_LOAD | SEC_ALLOC;
422 else if (styp_flags & STYP_DATA)
424 if (sec_flags & SEC_NEVER_LOAD)
425 sec_flags |= SEC_DATA | SEC_SHARED_LIBRARY;
427 sec_flags |= SEC_DATA | SEC_LOAD | SEC_ALLOC;
429 else if (styp_flags & STYP_BSS)
431 #ifdef BSS_NOLOAD_IS_SHARED_LIBRARY
432 if (sec_flags & SEC_NEVER_LOAD)
433 sec_flags |= SEC_ALLOC | SEC_SHARED_LIBRARY;
436 sec_flags |= SEC_ALLOC;
438 else if (styp_flags & STYP_INFO)
440 /* This should be marked as SEC_DEBUGGING, but that can't be
441 done until we make sure that strip can still work. strip
442 will probably have to preserve the same number of sections to
443 ensure that the section vma matches the section file
448 sec_flags |= SEC_ALLOC | SEC_LOAD;
451 #ifdef STYP_LIT /* A29k readonly text/data section type */
452 if ((styp_flags & STYP_LIT) == STYP_LIT)
454 sec_flags = (SEC_LOAD | SEC_ALLOC | SEC_READONLY);
456 #endif /* STYP_LIT */
457 #ifdef STYP_OTHER_LOAD /* Other loaded sections */
458 if (styp_flags & STYP_OTHER_LOAD)
460 sec_flags = (SEC_LOAD | SEC_ALLOC);
462 #endif /* STYP_SDATA */
467 #define get_index(symbol) ((long) (symbol)->udata)
471 bfd_coff_backend_data
475 Special entry points for gdb to swap in coff symbol table parts
478 . void (*_bfd_coff_swap_aux_in) PARAMS ((
485 . void (*_bfd_coff_swap_sym_in) PARAMS ((
490 . void (*_bfd_coff_swap_lineno_in) PARAMS ((
496 Special entry points for gas to swap coff parts
498 . unsigned int (*_bfd_coff_swap_aux_out) PARAMS ((
505 . unsigned int (*_bfd_coff_swap_sym_out) PARAMS ((
510 . unsigned int (*_bfd_coff_swap_lineno_out) PARAMS ((
515 . unsigned int (*_bfd_coff_swap_reloc_out) PARAMS ((
520 . unsigned int (*_bfd_coff_swap_filehdr_out) PARAMS ((
525 . unsigned int (*_bfd_coff_swap_aouthdr_out) PARAMS ((
530 . unsigned int (*_bfd_coff_swap_scnhdr_out) PARAMS ((
536 Special entry points for generic COFF routines to call target
537 dependent COFF routines
539 . unsigned int _bfd_filhsz;
540 . unsigned int _bfd_aoutsz;
541 . unsigned int _bfd_scnhsz;
542 . unsigned int _bfd_symesz;
543 . unsigned int _bfd_auxesz;
544 . unsigned int _bfd_linesz;
545 . boolean _bfd_coff_long_filenames;
546 . void (*_bfd_coff_swap_filehdr_in) PARAMS ((
550 . void (*_bfd_coff_swap_aouthdr_in) PARAMS ((
554 . void (*_bfd_coff_swap_scnhdr_in) PARAMS ((
558 . boolean (*_bfd_coff_bad_format_hook) PARAMS ((
560 . PTR internal_filehdr));
561 . boolean (*_bfd_coff_set_arch_mach_hook) PARAMS ((
563 . PTR internal_filehdr));
564 . PTR (*_bfd_coff_mkobject_hook) PARAMS ((
566 . PTR internal_filehdr,
567 . PTR internal_aouthdr));
568 . flagword (*_bfd_styp_to_sec_flags_hook) PARAMS ((
570 . PTR internal_scnhdr));
571 . asection *(*_bfd_make_section_hook) PARAMS ((
574 . void (*_bfd_set_alignment_hook) PARAMS ((
577 . PTR internal_scnhdr));
578 . boolean (*_bfd_coff_slurp_symbol_table) PARAMS ((
580 . boolean (*_bfd_coff_symname_in_debug) PARAMS ((
582 . struct internal_syment *sym));
583 . void (*_bfd_coff_reloc16_extra_cases) PARAMS ((
585 . struct bfd_seclet *seclet,
588 . unsigned int *src_ptr,
589 . unsigned int *dst_ptr));
590 . int (*_bfd_coff_reloc16_estimate) PARAMS ((
591 . asection *input_section,
594 . unsigned int shrink));
596 .} bfd_coff_backend_data;
598 .#define coff_backend_info(abfd) ((bfd_coff_backend_data *) (abfd)->xvec->backend_data)
600 .#define bfd_coff_swap_aux_in(a,e,t,c,i) \
601 . ((coff_backend_info (a)->_bfd_coff_swap_aux_in) (a,e,t,c,i))
603 .#define bfd_coff_swap_sym_in(a,e,i) \
604 . ((coff_backend_info (a)->_bfd_coff_swap_sym_in) (a,e,i))
606 .#define bfd_coff_swap_lineno_in(a,e,i) \
607 . ((coff_backend_info ( a)->_bfd_coff_swap_lineno_in) (a,e,i))
609 .#define bfd_coff_swap_reloc_out(abfd, i, o) \
610 . ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_out) (abfd, i, o))
612 .#define bfd_coff_swap_lineno_out(abfd, i, o) \
613 . ((coff_backend_info (abfd)->_bfd_coff_swap_lineno_out) (abfd, i, o))
615 .#define bfd_coff_swap_aux_out(abfd, i, t,c,o) \
616 . ((coff_backend_info (abfd)->_bfd_coff_swap_aux_out) (abfd, i,t,c, o))
618 .#define bfd_coff_swap_sym_out(abfd, i,o) \
619 . ((coff_backend_info (abfd)->_bfd_coff_swap_sym_out) (abfd, i, o))
621 .#define bfd_coff_swap_scnhdr_out(abfd, i,o) \
622 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_out) (abfd, i, o))
624 .#define bfd_coff_swap_filehdr_out(abfd, i,o) \
625 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_out) (abfd, i, o))
627 .#define bfd_coff_swap_aouthdr_out(abfd, i,o) \
628 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_out) (abfd, i, o))
630 .#define bfd_coff_filhsz(abfd) (coff_backend_info (abfd)->_bfd_filhsz)
631 .#define bfd_coff_aoutsz(abfd) (coff_backend_info (abfd)->_bfd_aoutsz)
632 .#define bfd_coff_scnhsz(abfd) (coff_backend_info (abfd)->_bfd_scnhsz)
633 .#define bfd_coff_symesz(abfd) (coff_backend_info (abfd)->_bfd_symesz)
634 .#define bfd_coff_auxesz(abfd) (coff_backend_info (abfd)->_bfd_auxesz)
635 .#define bfd_coff_linesz(abfd) (coff_backend_info (abfd)->_bfd_linesz)
636 .#define bfd_coff_long_filenames(abfd) (coff_backend_info (abfd)->_bfd_coff_long_filenames)
637 .#define bfd_coff_swap_filehdr_in(abfd, i,o) \
638 . ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_in) (abfd, i, o))
640 .#define bfd_coff_swap_aouthdr_in(abfd, i,o) \
641 . ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_in) (abfd, i, o))
643 .#define bfd_coff_swap_scnhdr_in(abfd, i,o) \
644 . ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_in) (abfd, i, o))
646 .#define bfd_coff_bad_format_hook(abfd, filehdr) \
647 . ((coff_backend_info (abfd)->_bfd_coff_bad_format_hook) (abfd, filehdr))
649 .#define bfd_coff_set_arch_mach_hook(abfd, filehdr)\
650 . ((coff_backend_info (abfd)->_bfd_coff_set_arch_mach_hook) (abfd, filehdr))
651 .#define bfd_coff_mkobject_hook(abfd, filehdr, aouthdr)\
652 . ((coff_backend_info (abfd)->_bfd_coff_mkobject_hook) (abfd, filehdr, aouthdr))
654 .#define bfd_coff_styp_to_sec_flags_hook(abfd, scnhdr)\
655 . ((coff_backend_info (abfd)->_bfd_styp_to_sec_flags_hook) (abfd, scnhdr))
657 .#define bfd_coff_make_section_hook(abfd, name)\
658 . ((coff_backend_info (abfd)->_bfd_make_section_hook) (abfd, name))
660 .#define bfd_coff_set_alignment_hook(abfd, sec, scnhdr)\
661 . ((coff_backend_info (abfd)->_bfd_set_alignment_hook) (abfd, sec, scnhdr))
663 .#define bfd_coff_slurp_symbol_table(abfd)\
664 . ((coff_backend_info (abfd)->_bfd_coff_slurp_symbol_table) (abfd))
666 .#define bfd_coff_symname_in_debug(abfd, sym)\
667 . ((coff_backend_info (abfd)->_bfd_coff_symname_in_debug) (abfd, sym))
669 .#define bfd_coff_reloc16_extra_cases(abfd, seclet, reloc, data, src_ptr, dst_ptr)\
670 . ((coff_backend_info (abfd)->_bfd_coff_reloc16_extra_cases)\
671 . (abfd, seclet, reloc, data, src_ptr, dst_ptr))
673 .#define bfd_coff_reloc16_estimate(abfd, section, symbols, reloc, shrink)\
674 . ((coff_backend_info (abfd)->_bfd_coff_reloc16_estimate)\
675 . (section, symbols, reloc, shrink))
679 /* See whether the magic number matches. */
682 DEFUN(coff_bad_format_hook, (abfd, filehdr),
686 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
688 if (BADMAG (*internal_f))
691 /* if the optional header is NULL or not the correct size then
692 quit; the only difference I can see between m88k dgux headers (MC88DMAGIC)
693 and Intel 960 readwrite headers (I960WRMAGIC) is that the
694 optional header is of a different size.
696 But the mips keeps extra stuff in it's opthdr, so dont check
700 #if defined(M88) || defined(I960)
701 if (internal_f->f_opthdr != 0 && AOUTSZ != internal_f->f_opthdr)
709 DEFUN (coff_make_section_hook, (abfd, name),
714 /* FIXME: This predates the call to bfd_make_section_anyway
715 in make_a_section_from_file, and can probably go away. */
716 /* On SCO a file created by the Microsoft assembler can have two
717 .data sections. We use .data2 for the second one. */
718 if (strcmp (name, _DATA) == 0)
719 return bfd_make_section (abfd, ".data2");
721 return (asection *) NULL;
725 initialize a section structure with information peculiar to this
726 particular implementation of coff
730 DEFUN(coff_new_section_hook,(abfd, section),
734 section->alignment_power = abfd->xvec->align_power_min;
735 /* Allocate aux records for section symbols, to store size and
738 @@ Shouldn't use constant multiplier here! */
739 coffsymbol (section->symbol)->native =
740 (combined_entry_type *) bfd_zalloc (abfd,
741 sizeof (combined_entry_type) * 10);
748 /* Set the alignment of a BFD section. */
751 DEFUN (coff_set_alignment_hook, (abfd, section, scnhdr),
753 asection *section AND
756 struct internal_scnhdr *hdr = (struct internal_scnhdr *) scnhdr;
759 for (i = 0; i < 32; i++)
760 if ((1 << i) >= hdr->s_align)
762 section->alignment_power = i;
767 #define coff_set_alignment_hook \
768 ((void (*) PARAMS ((bfd *, asection *, PTR))) bfd_void)
773 DEFUN(coff_mkobject,(abfd),
776 coff_data_type *coff;
778 abfd->tdata.coff_obj_data = (struct coff_tdata *)bfd_zalloc (abfd,sizeof(coff_data_type));
779 if (abfd->tdata.coff_obj_data == 0){
780 bfd_error = no_memory;
783 coff = coff_data (abfd);
784 coff->symbols = (coff_symbol_type *) NULL;
785 coff->conversion_table = (unsigned int *) NULL;
786 coff->raw_syments = (struct coff_ptr_struct *) NULL;
787 coff->raw_linenos = (struct lineno *) NULL;
789 /* make_abs_section(abfd);*/
793 /* Create the COFF backend specific information. */
796 DEFUN(coff_mkobject_hook,(abfd, filehdr, aouthdr),
801 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
802 coff_data_type *coff;
804 if (coff_mkobject (abfd) == false)
807 coff = coff_data (abfd);
809 coff->sym_filepos = internal_f->f_symptr;
810 coff->flags = internal_f->f_flags;
812 /* These members communicate important constants about the symbol
813 table to GDB's symbol-reading code. These `constants'
814 unfortunately vary among coff implementations... */
815 coff->local_n_btmask = N_BTMASK;
816 coff->local_n_btshft = N_BTSHFT;
817 coff->local_n_tmask = N_TMASK;
818 coff->local_n_tshift = N_TSHIFT;
819 coff->local_symesz = SYMESZ;
820 coff->local_auxesz = AUXESZ;
821 coff->local_linesz = LINESZ;
826 /* Determine the machine architecture and type. FIXME: This is target
827 dependent because the magic numbers are defined in the target
828 dependent header files. But there is no particular need for this.
829 If the magic numbers were moved to a separate file, this function
830 would be target independent and would also be much more successful
831 at linking together COFF files for different architectures. */
834 coff_set_arch_mach_hook(abfd, filehdr)
839 enum bfd_architecture arch;
840 struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
843 switch (internal_f->f_magic) {
847 case I386AIXMAGIC: /* Danbury PS/2 AIX C Compiler */
849 arch = bfd_arch_i386;
854 #ifdef A29K_MAGIC_BIG
856 case A29K_MAGIC_LITTLE:
857 arch = bfd_arch_a29k;
868 #ifdef APOLLOM68KMAGIC
869 case APOLLOM68KMAGIC:
871 arch = bfd_arch_m68k;
879 arch = bfd_arch_m88k;
886 switch (internal_f->f_flags & F_MACHMASK)
889 machine = bfd_mach_z8001;
892 machine = bfd_mach_z8002;
903 arch = bfd_arch_i960;
904 switch (F_I960TYPE & internal_f->f_flags)
908 machine = bfd_mach_i960_core;
911 machine = bfd_mach_i960_kb_sb;
914 machine = bfd_mach_i960_mc;
917 machine = bfd_mach_i960_xa;
920 machine = bfd_mach_i960_ca;
923 machine = bfd_mach_i960_ka_sa;
934 arch = bfd_arch_rs6000;
941 arch = bfd_arch_we32k;
948 arch = bfd_arch_h8300;
949 machine = bfd_mach_h8300;
950 /* !! FIXME this probably isn't the right place for this */
951 abfd->flags |= BFD_IS_RELAXABLE;
957 arch = bfd_arch_h8300;
958 machine = bfd_mach_h8300h;
959 /* !! FIXME this probably isn't the right place for this */
960 abfd->flags |= BFD_IS_RELAXABLE;
973 arch = bfd_arch_h8500;
978 default: /* Unreadable input file type */
979 arch = bfd_arch_obscure;
983 bfd_default_set_arch_mach(abfd, arch, machine);
987 #ifdef SYMNAME_IN_DEBUG
990 DEFUN (symname_in_debug_hook, (abfd, sym),
992 struct internal_syment *sym)
994 return SYMNAME_IN_DEBUG (sym) ? true : false;
999 #define symname_in_debug_hook \
1000 (boolean (*) PARAMS ((bfd *, struct internal_syment *))) bfd_false
1008 To write relocations, all the back end does is step though the
1009 canonical relocation table, and create an
1010 @code{internal_reloc}. The symbol index to use is removed from
1011 the @code{offset} field in the symbol table supplied, the
1012 address comes directly from the sum of the section base
1013 address and the relocation offset and the type is dug directly
1014 from the howto field. Then the @code{internal_reloc} is
1015 swapped into the shape of an @code{external_reloc} and written
1021 DEFUN(coff_write_relocs,(abfd),
1025 for (s = abfd->sections; s != (asection *) NULL; s = s->next) {
1027 struct external_reloc dst;
1029 arelent **p = s->orelocation;
1030 bfd_seek(abfd, s->rel_filepos, SEEK_SET);
1031 for (i = 0; i < s->reloc_count; i++) {
1032 struct internal_reloc n;
1034 memset((PTR)&n, 0, sizeof(n));
1036 n.r_vaddr = q->address + s->vma;
1037 /* The 29k const/consth reloc pair is a real kludge - the consth
1038 part doesn't have a symbol - it has an offset. So rebuilt
1041 if (q->howto->type == R_IHCONST)
1042 n.r_symndx = q->addend;
1049 if (q->sym_ptr_ptr == bfd_abs_section.symbol_ptr_ptr)
1051 /* This is a relocation relative to the absolute symbol */
1056 n.r_symndx = get_index((*(q->sym_ptr_ptr)));
1057 /* Take notice if the symbol reloc points to a symbol we don't have
1058 in our symbol table. What should we do for this?? */
1059 if (n.r_symndx > obj_conv_table_size (abfd))
1067 /* Work out reloc type from what is required */
1068 SELECT_RELOC(n.r_type, q->howto);
1070 n.r_type = q->howto->type;
1072 coff_swap_reloc_out(abfd, &n, &dst);
1073 bfd_write((PTR) &dst, 1, RELSZ, abfd);
1078 /* Set flags and magic number of a coff file from architecture and machine
1079 type. Result is true if we can represent the arch&type, false if not. */
1082 DEFUN(coff_set_flags,(abfd, magicp, flagsp),
1084 unsigned *magicp AND
1085 unsigned short *flagsp)
1087 switch (bfd_get_arch(abfd)) {
1091 switch (bfd_get_mach(abfd))
1093 case bfd_mach_z8001:
1096 case bfd_mach_z8002:
1110 *magicp = I960ROMAGIC;
1112 ((bfd_get_file_flags(abfd) & WP_TEXT) ? I960ROMAGIC :
1113 I960RWMAGIC); FIXME???
1115 switch (bfd_get_mach(abfd)) {
1116 case bfd_mach_i960_core:
1119 case bfd_mach_i960_kb_sb:
1122 case bfd_mach_i960_mc:
1125 case bfd_mach_i960_xa:
1128 case bfd_mach_i960_ca:
1131 case bfd_mach_i960_ka_sa:
1144 *magicp = I386MAGIC;
1150 #ifdef APOLLOM68KMAGIC
1151 *magicp = APOLLO_COFF_VERSION_NUMBER;
1153 *magicp = MC68MAGIC;
1161 *magicp = MC88OMAGIC;
1166 case bfd_arch_h8300:
1167 switch (bfd_get_mach (abfd))
1169 case bfd_mach_h8300:
1170 *magicp = H8300MAGIC;
1172 case bfd_mach_h8300h:
1173 *magicp = H8300HMAGIC;
1187 case bfd_arch_h8500:
1188 *magicp = H8500MAGIC;
1192 #ifdef A29K_MAGIC_BIG
1194 if (abfd->xvec->byteorder_big_p)
1195 *magicp = A29K_MAGIC_BIG;
1197 *magicp = A29K_MAGIC_LITTLE;
1203 case bfd_arch_we32k:
1204 *magicp = WE32KMAGIC;
1210 case bfd_arch_rs6000:
1211 *magicp = U802TOCMAGIC;
1216 default: /* Unknown architecture */
1217 /* return false; -- fall through to "return false" below, to avoid
1218 "statement never reached" errors on the one below. */
1227 DEFUN(coff_set_arch_mach,(abfd, arch, machine),
1229 enum bfd_architecture arch AND
1230 unsigned long machine)
1233 unsigned short dummy2;
1234 bfd_default_set_arch_mach(abfd, arch, machine);
1236 if (arch != bfd_arch_unknown &&
1237 coff_set_flags(abfd, &dummy1, &dummy2) != true)
1238 return false; /* We can't represent this type */
1239 return true; /* We're easy ... */
1243 /* Calculate the file position for each section. */
1246 DEFUN(coff_compute_section_file_positions,(abfd),
1250 asection *previous = (asection *)NULL;
1251 file_ptr sofar = FILHSZ;
1255 if (bfd_get_start_address(abfd))
1257 /* A start address may have been added to the original file. In this
1258 case it will need an optional header to record it. */
1259 abfd->flags |= EXEC_P;
1262 if (abfd->flags & EXEC_P)
1265 sofar += abfd->section_count * SCNHSZ;
1266 for (current = abfd->sections;
1267 current != (asection *)NULL;
1268 current = current->next) {
1270 /* Only deal with sections which have contents */
1271 if (!(current->flags & SEC_HAS_CONTENTS))
1274 /* Align the sections in the file to the same boundary on
1275 which they are aligned in virtual memory. I960 doesn't
1276 do this (FIXME) so we can stay in sync with Intel. 960
1277 doesn't yet page from files... */
1280 /* make sure this section is aligned on the right boundary - by
1281 padding the previous section up if necessary */
1284 sofar = BFD_ALIGN(sofar, 1 << current->alignment_power);
1285 if (previous != (asection *)NULL) {
1286 previous->_raw_size += sofar - old_sofar;
1291 /* FIXME, in demand paged files, the low order bits of the file
1292 offset must match the low order bits of the virtual address.
1293 "Low order" is apparently implementation defined. Add code
1294 here to round sofar up to match the virtual address. */
1296 current->filepos = sofar;
1298 sofar += current->_raw_size;
1300 /* make sure that this section is of the right size too */
1302 sofar = BFD_ALIGN(sofar, 1 << current->alignment_power);
1303 current->_raw_size += sofar - old_sofar ;
1307 /* Force .lib sections to start at zero. The vma is then
1308 incremented in coff_set_section_contents. This is right for
1310 if (strcmp (current->name, _LIB) == 0)
1311 bfd_set_section_vma (abfd, current, 0);
1316 obj_relocbase(abfd) = sofar;
1319 /* If .file, .text, .data, .bss symbols are missing, add them. */
1320 /* @@ Should we only be adding missing symbols, or overriding the aux
1321 values for existing section symbols? */
1323 coff_add_missing_symbols (abfd)
1326 unsigned int nsyms = bfd_get_symcount (abfd);
1327 asymbol **sympp = abfd->outsymbols;
1330 int need_text = 1, need_data = 1, need_bss = 1, need_file = 1;
1332 for (i = 0; i < nsyms; i++)
1334 coff_symbol_type *csym = coff_symbol_from (abfd, sympp[i]);
1338 /* only do this if there is a coff representation of the input
1340 if (csym->native && csym->native->u.syment.n_sclass == C_FILE)
1345 name = csym->symbol.name;
1348 if (!strcmp (name, _TEXT))
1351 else if (!strcmp(name, ".wtext"))
1354 else if (!strcmp (name, _DATA))
1356 else if (!strcmp (name, _BSS))
1360 /* Now i == bfd_get_symcount (abfd). */
1361 /* @@ For now, don't deal with .file symbol. */
1364 if (!need_text && !need_data && !need_bss && !need_file)
1366 nsyms += need_text + need_data + need_bss + need_file;
1367 sympp2 = (asymbol**) bfd_alloc_by_size_t (abfd, nsyms * sizeof (asymbol *));
1368 memcpy (sympp2, sympp, i * sizeof (asymbol *));
1371 /* @@ Generate fake .file symbol, in sympp2[i], and increment i. */
1375 sympp2[i++] = coff_section_symbol (abfd, _TEXT);
1377 sympp2[i++] = coff_section_symbol (abfd, _DATA);
1379 sympp2[i++] = coff_section_symbol (abfd, _BSS);
1380 BFD_ASSERT (i == nsyms);
1381 bfd_set_symtab (abfd, sympp2, nsyms);
1387 DEFUN(coff_write_object_contents,(abfd),
1393 boolean hasrelocs = false;
1394 boolean haslinno = false;
1395 file_ptr reloc_base;
1396 file_ptr lineno_base;
1400 unsigned long reloc_size = 0;
1401 unsigned long lnno_size = 0;
1402 asection *text_sec = NULL;
1403 asection *data_sec = NULL;
1404 asection *bss_sec = NULL;
1406 struct internal_filehdr internal_f;
1407 struct internal_aouthdr internal_a;
1410 bfd_error = system_call_error;
1411 /* Number the output sections, starting from one on the first section
1412 with a name which doesn't start with a *.
1413 @@ The code doesn't make this check. Is it supposed to be done,
1416 for (current = abfd->sections; current != (asection *)NULL;
1417 current = current->next)
1419 current->target_index = count;
1423 if(abfd->output_has_begun == false) {
1424 coff_compute_section_file_positions(abfd);
1427 if (abfd->sections != (asection *)NULL) {
1428 scn_base = abfd->sections->filepos;
1433 if (bfd_seek(abfd, scn_base, SEEK_SET) != 0)
1435 reloc_base = obj_relocbase(abfd);
1437 /* Make a pass through the symbol table to count line number entries and
1438 put them into the correct asections */
1440 lnno_size = coff_count_linenumbers(abfd) * LINESZ;
1441 data_base = scn_base;
1443 /* Work out the size of the reloc and linno areas */
1445 for (current = abfd->sections; current != NULL; current =
1448 /* We give section headers to +ve indexes */
1449 if (current->target_index > 0)
1452 reloc_size += current->reloc_count * RELSZ;
1453 data_base += SCNHSZ;
1458 lineno_base = reloc_base + reloc_size;
1459 sym_base = lineno_base + lnno_size;
1461 /* Indicate in each section->line_filepos its actual file address */
1462 for (current = abfd->sections; current != NULL; current =
1465 if (current->target_index > 0)
1468 if (current->lineno_count) {
1469 current->line_filepos = lineno_base;
1470 current->moving_line_filepos = lineno_base;
1471 lineno_base += current->lineno_count * LINESZ;
1474 current->line_filepos = 0;
1476 if (current->reloc_count) {
1477 current->rel_filepos = reloc_base;
1478 reloc_base += current->reloc_count * RELSZ;
1481 current->rel_filepos = 0;
1488 /* Write section headers to the file. */
1489 internal_f.f_nscns = 0;
1491 (file_ptr) ((abfd->flags & EXEC_P) ?
1492 (FILHSZ + AOUTSZ) : FILHSZ),
1497 unsigned int pad = abfd->flags & D_PAGED ? data_base : 0;
1499 unsigned int pad = 0;
1501 for (current = abfd->sections;
1503 current = current->next) {
1504 struct internal_scnhdr section;
1505 if (current->target_index > 0)
1507 internal_f.f_nscns ++;
1508 strncpy(&(section.s_name[0]), current->name, 8);
1510 /* Always set s_vaddr of .lib to 0. This is right for SVR3.2
1511 Ian Taylor <ian@cygnus.com>. */
1512 if (strcmp (current->name, _LIB) == 0)
1513 section.s_vaddr = 0;
1516 section.s_vaddr = current->lma + pad;
1517 section.s_paddr = current->lma + pad;
1518 section.s_size = current->_raw_size - pad;
1520 If this section has no size or is unloadable then the scnptr
1523 if (current->_raw_size - pad == 0 ||
1524 (current->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0) {
1525 section.s_scnptr = 0;
1528 section.s_scnptr = current->filepos;
1530 section.s_relptr = current->rel_filepos;
1531 section.s_lnnoptr = current->line_filepos;
1532 section.s_nreloc = current->reloc_count;
1533 section.s_nlnno = current->lineno_count;
1534 if (current->reloc_count != 0)
1536 if (current->lineno_count != 0)
1539 section.s_flags = sec_to_styp_flags(current->name,current->flags);
1541 if (!strcmp(current->name, _TEXT)) {
1543 } else if (!strcmp(current->name, _DATA)) {
1545 #ifdef TWO_DATA_SECS
1546 } else if (!strcmp(current->name, ".data2")) {
1548 #endif /* TWO_DATA_SECS */
1549 } else if (!strcmp(current->name, _BSS)) {
1554 section.s_align = (current->alignment_power
1555 ? 1 << current->alignment_power
1562 coff_swap_scnhdr_out(abfd, §ion, &buff);
1563 bfd_write((PTR) (&buff), 1, SCNHSZ, abfd);
1573 /* OK, now set up the filehdr... */
1575 /* Don't include the internal abs section in the section count */
1578 We will NOT put a fucking timestamp in the header here. Every time you
1579 put it back, I will come in and take it out again. I'm sorry. This
1580 field does not belong here. We fill it with a 0 so it compares the
1581 same but is not a reasonable time. -- gnu@cygnus.com
1583 internal_f.f_timdat = 0;
1585 if (bfd_get_symcount(abfd) != 0)
1586 internal_f.f_symptr = sym_base;
1588 internal_f.f_symptr = 0;
1590 internal_f.f_flags = 0;
1592 if (abfd->flags & EXEC_P)
1593 internal_f.f_opthdr = AOUTSZ;
1595 internal_f.f_opthdr = 0;
1598 internal_f.f_flags |= F_RELFLG;
1600 internal_f.f_flags |= F_LNNO;
1601 if (0 == bfd_get_symcount(abfd))
1602 internal_f.f_flags |= F_LSYMS;
1603 if (abfd->flags & EXEC_P)
1604 internal_f.f_flags |= F_EXEC;
1606 if (!abfd->xvec->byteorder_big_p)
1607 internal_f.f_flags |= F_AR32WR;
1609 internal_f.f_flags |= F_AR32W;
1612 FIXME, should do something about the other byte orders and
1616 /* Set up architecture-dependent stuff */
1618 { unsigned int magic = 0;
1619 unsigned short flags = 0;
1620 coff_set_flags(abfd, &magic, &flags);
1621 internal_f.f_magic = magic;
1622 internal_f.f_flags |= flags;
1623 /* ...and the "opt"hdr... */
1626 # ifdef ULTRA3 /* NYU's machine */
1627 /* FIXME: This is a bogus check. I really want to see if there
1628 * is a .shbss or a .shdata section, if so then set the magic
1629 * number to indicate a shared data executable.
1631 if (internal_f.f_nscns >= 7)
1632 internal_a.magic = SHMAGIC; /* Shared magic */
1634 # endif /* ULTRA3 */
1635 internal_a.magic = NMAGIC; /* Assume separate i/d */
1636 #define __A_MAGIC_SET__
1639 internal_a.magic = (magic == I960ROMAGIC ? NMAGIC : OMAGIC);
1640 #define __A_MAGIC_SET__
1643 #define __A_MAGIC_SET__
1644 internal_a.magic = PAGEMAGICBCS;
1648 #define __A_MAGIC_SET__
1649 internal_a.magic = APOLLO_COFF_VERSION_NUMBER;
1653 #define __A_MAGIC_SET__
1654 /* Never was anything here for the 68k */
1655 #endif /* M68 || WE32K */
1658 # define __A_MAGIC_SET__
1659 internal_a.magic = ZMAGIC;
1663 #define __A_MAGIC_SET__
1664 internal_a.magic = (abfd->flags & D_PAGED)? RS6K_AOUTHDR_ZMAGIC:
1665 (abfd->flags & WP_TEXT)? RS6K_AOUTHDR_NMAGIC:
1666 RS6K_AOUTHDR_OMAGIC;
1669 #ifndef __A_MAGIC_SET__
1670 # include "Your aouthdr magic number is not being set!"
1672 # undef __A_MAGIC_SET__
1675 /* Now should write relocs, strings, syms */
1676 obj_sym_filepos(abfd) = sym_base;
1678 if (bfd_get_symcount(abfd) != 0) {
1679 coff_add_missing_symbols (abfd);
1680 coff_renumber_symbols(abfd);
1681 coff_mangle_symbols(abfd);
1682 coff_write_symbols(abfd);
1683 coff_write_linenumbers(abfd);
1684 coff_write_relocs(abfd);
1687 internal_a.tsize = bfd_get_section_size_before_reloc(text_sec);
1688 internal_a.text_start = internal_a.tsize ? text_sec->vma : 0;
1691 internal_a.dsize = bfd_get_section_size_before_reloc(data_sec);
1692 internal_a.data_start = internal_a.dsize ? data_sec->vma : 0;
1695 internal_a.bsize = bfd_get_section_size_before_reloc(bss_sec);
1698 internal_a.entry = bfd_get_start_address(abfd);
1699 internal_f.f_nsyms = bfd_get_symcount(abfd);
1701 /* now write them */
1702 if (bfd_seek(abfd, (file_ptr) 0, SEEK_SET) != 0)
1706 coff_swap_filehdr_out(abfd, (PTR)&internal_f, (PTR)&buff);
1707 bfd_write((PTR) &buff, 1, FILHSZ, abfd);
1709 if (abfd->flags & EXEC_P) {
1711 coff_swap_aouthdr_out(abfd, (PTR)&internal_a, (PTR)&buff);
1712 bfd_write((PTR) &buff, 1, AOUTSZ, abfd);
1718 DEFUN(coff_set_section_contents,(abfd, section, location, offset, count),
1723 bfd_size_type count)
1725 if (abfd->output_has_begun == false) /* set by bfd.c handler */
1726 coff_compute_section_file_positions(abfd);
1729 /* If this is a .lib section, bump the vma address so that it
1730 winds up being the number of .lib sections output. This is
1731 right for SVR3.2. Shared libraries should probably get more
1732 generic support. Ian Taylor <ian@cygnus.com>. */
1733 if (strcmp (section->name, _LIB) == 0)
1737 /* Don't write out bss sections - one way to do this is to
1738 see if the filepos has not been set. */
1739 if (section->filepos == 0)
1742 bfd_seek(abfd, (file_ptr) (section->filepos + offset), SEEK_SET);
1745 return (bfd_write(location, 1, count, abfd) == count) ? true : false;
1751 coff_close_and_cleanup(abfd)
1754 if (!bfd_read_p(abfd))
1755 switch (abfd->format) {
1757 if (!_bfd_write_archive_contents(abfd))
1761 if (!coff_write_object_contents(abfd))
1765 bfd_error = invalid_operation;
1769 /* We depend on bfd_close to free all the memory on the obstack. */
1770 /* FIXME if bfd_release is not using obstacks! */
1777 buy_and_read(abfd, where, seek_direction, size)
1783 PTR area = (PTR) bfd_alloc(abfd, size);
1785 bfd_error = no_memory;
1788 bfd_seek(abfd, where, seek_direction);
1789 if (bfd_read(area, 1, size, abfd) != size) {
1790 bfd_error = system_call_error;
1794 } /* buy_and_read() */
1800 Creating the linenumber table is done by reading in the entire
1801 coff linenumber table, and creating another table for internal use.
1803 A coff line number table is structured so that each function
1804 is marked as having a line number of 0. Each line within the
1805 function is an offset from the first line in the function. The
1806 base of the line number information for the table is stored in
1807 the symbol associated with the function.
1809 The information is copied from the external to the internal
1810 table, and each symbol which marks a function is marked by
1813 How does this work ?
1818 coff_slurp_line_table(abfd, asect)
1822 LINENO *native_lineno;
1823 alent *lineno_cache;
1825 BFD_ASSERT(asect->lineno == (alent *) NULL);
1827 native_lineno = (LINENO *) buy_and_read(abfd,
1828 asect->line_filepos,
1831 asect->lineno_count));
1833 (alent *) bfd_alloc(abfd, (size_t) ((asect->lineno_count + 1) * sizeof(alent)));
1834 if (lineno_cache == NULL) {
1835 bfd_error = no_memory;
1838 unsigned int counter = 0;
1839 alent *cache_ptr = lineno_cache;
1840 LINENO *src = native_lineno;
1842 while (counter < asect->lineno_count) {
1843 struct internal_lineno dst;
1844 coff_swap_lineno_in(abfd, src, &dst);
1845 cache_ptr->line_number = dst.l_lnno;
1847 if (cache_ptr->line_number == 0) {
1848 coff_symbol_type *sym =
1849 (coff_symbol_type *) (dst.l_addr.l_symndx
1850 + obj_raw_syments(abfd))->u.syment._n._n_n._n_zeroes;
1851 cache_ptr->u.sym = (asymbol *) sym;
1852 sym->lineno = cache_ptr;
1855 cache_ptr->u.offset = dst.l_addr.l_paddr
1856 - bfd_section_vma(abfd, asect);
1857 } /* If no linenumber expect a symbol index */
1863 cache_ptr->line_number = 0;
1866 asect->lineno = lineno_cache;
1867 /* FIXME, free native_lineno here, or use alloca or something. */
1869 } /* coff_slurp_line_table() */
1872 DEFUN(coff_slurp_symbol_table,(abfd),
1875 combined_entry_type *native_symbols;
1876 coff_symbol_type *cached_area;
1877 unsigned int *table_ptr;
1879 unsigned int number_of_symbols = 0;
1880 if (obj_symbols(abfd))
1882 bfd_seek(abfd, obj_sym_filepos(abfd), SEEK_SET);
1884 /* Read in the symbol table */
1885 if ((native_symbols = coff_get_normalized_symtab(abfd)) == NULL) {
1889 /* Allocate enough room for all the symbols in cached form */
1891 (coff_symbol_type *)
1892 bfd_alloc(abfd, (size_t) (bfd_get_symcount(abfd) * sizeof(coff_symbol_type)));
1894 if (cached_area == NULL) {
1895 bfd_error = no_memory;
1900 bfd_alloc(abfd, (size_t) (bfd_get_symcount(abfd) * sizeof(unsigned int)));
1902 if (table_ptr == NULL) {
1903 bfd_error = no_memory;
1908 coff_symbol_type *dst = cached_area;
1909 unsigned int last_native_index = bfd_get_symcount(abfd);
1910 unsigned int this_index = 0;
1911 while (this_index < last_native_index) {
1912 combined_entry_type *src = native_symbols + this_index;
1913 table_ptr[this_index] = number_of_symbols;
1914 dst->symbol.the_bfd = abfd;
1916 dst->symbol.name = (char *)(src->u.syment._n._n_n._n_offset);
1918 We use the native name field to point to the cached field
1920 src->u.syment._n._n_n._n_zeroes = (long) dst;
1921 dst->symbol.section = coff_section_from_bfd_index(abfd,
1922 src->u.syment.n_scnum);
1923 dst->symbol.flags = 0;
1924 dst->done_lineno = false;
1926 switch (src->u.syment.n_sclass) {
1930 dst->symbol.value = src->u.syment.n_value - dst->symbol.section->vma;
1931 dst->symbol.flags = BSF_EXPORT | BSF_GLOBAL;
1932 dst->symbol.flags |= BSF_NOT_AT_END;
1934 /* Fall through to next case */
1942 if ((src->u.syment.n_scnum) == 0) {
1943 if ((src->u.syment.n_value) == 0) {
1944 dst->symbol.section = &bfd_und_section;
1945 dst->symbol.value= 0;
1948 dst->symbol.section = &bfd_com_section;
1949 dst->symbol.value = (src->u.syment.n_value);
1954 Base the value as an index from the base of the
1958 dst->symbol.flags = BSF_EXPORT | BSF_GLOBAL;
1959 dst->symbol.value = src->u.syment.n_value - dst->symbol.section->vma;
1961 if (ISFCN((src->u.syment.n_type))) {
1963 A function ext does not go at the end of a file
1965 dst->symbol.flags |= BSF_NOT_AT_END;
1972 case C_STAT: /* static */
1974 case C_LEAFSTAT: /* static leaf procedure */
1976 case C_LABEL: /* label */
1977 if (src->u.syment.n_scnum == -2)
1978 dst->symbol.flags = BSF_DEBUGGING;
1980 dst->symbol.flags = BSF_LOCAL;
1982 Base the value as an index from the base of the section, if
1985 if (dst->symbol.section)
1986 dst->symbol.value = (src->u.syment.n_value) -
1987 dst->symbol.section->vma;
1989 dst->symbol.value = (src->u.syment.n_value) ;
1992 case C_MOS: /* member of structure */
1993 case C_EOS: /* end of structure */
1994 #ifdef NOTDEF /* C_AUTOARG has the same value */
1996 case C_GLBLREG: /* A29k-specific storage class */
1999 case C_REGPARM: /* register parameter */
2000 case C_REG: /* register variable */
2002 case C_AUTOARG: /* 960-specific storage class */
2004 case C_TPDEF: /* type definition */
2006 case C_AUTO: /* automatic variable */
2007 case C_FIELD: /* bit field */
2008 case C_ENTAG: /* enumeration tag */
2009 case C_MOE: /* member of enumeration */
2010 case C_MOU: /* member of union */
2011 case C_UNTAG: /* union tag */
2012 dst->symbol.flags = BSF_DEBUGGING;
2013 dst->symbol.value = (src->u.syment.n_value);
2016 case C_FILE: /* file name */
2017 case C_STRTAG: /* structure tag */
2019 case C_BINCL: /* beginning of include file */
2020 case C_EINCL: /* ending of include file */
2033 dst->symbol.flags = BSF_DEBUGGING;
2034 dst->symbol.value = (src->u.syment.n_value);
2037 case C_BLOCK: /* ".bb" or ".eb" */
2038 case C_FCN: /* ".bf" or ".ef" */
2039 case C_EFCN: /* physical end of function */
2040 dst->symbol.flags = BSF_LOCAL;
2042 Base the value as an index from the base of the section
2044 dst->symbol.value = (src->u.syment.n_value) - dst->symbol.section->vma;
2048 case C_EXTDEF: /* external definition */
2049 case C_ULABEL: /* undefined label */
2050 case C_USTATIC: /* undefined static */
2051 case C_LINE: /* line # reformatted as symbol table entry */
2052 case C_ALIAS: /* duplicate tag */
2053 case C_HIDDEN: /* ext symbol in dmert public lib */
2056 fprintf(stderr,"Unrecognized storage class %d\n",
2057 src->u.syment.n_sclass);
2059 dst->symbol.flags = BSF_DEBUGGING;
2060 dst->symbol.value = (src->u.syment.n_value);
2064 /* BFD_ASSERT(dst->symbol.flags != 0);*/
2068 dst->symbol.udata = 0;
2069 dst->lineno = (alent *) NULL;
2070 this_index += (src->u.syment.n_numaux) + 1;
2072 number_of_symbols++;
2073 } /* walk the native symtab */
2074 } /* bfdize the native symtab */
2076 obj_symbols(abfd) = cached_area;
2077 obj_raw_syments(abfd) = native_symbols;
2079 obj_conv_table_size (abfd) = bfd_get_symcount (abfd);
2080 bfd_get_symcount(abfd) = number_of_symbols;
2081 obj_convert(abfd) = table_ptr;
2082 /* Slurp the line tables for each section too */
2087 coff_slurp_line_table(abfd, p);
2092 } /* coff_slurp_symbol_table() */
2098 Coff relocations are easily transformed into the internal BFD form
2101 Reading a coff relocation table is done in the following stages:
2103 o The entire coff relocation table is read into memory.
2105 o Each relocation is processed in turn, first it is swapped from the
2106 external to the internal form.
2108 o The symbol referenced in the relocation's symbol index is
2109 turned intoa pointer into the canonical symbol table. Note
2110 that this table is the same as the one returned by a call to
2111 @code{bfd_canonicalize_symtab}. The back end will call the
2112 routine and save the result if a canonicalization hasn't been done.
2114 o The reloc index is turned into a pointer to a howto
2115 structure, in a back end specific way. For instance, the 386
2116 and 960 use the @code{r_type} to directly produce an index
2117 into a howto table vector; the 88k subtracts a number from the
2118 @code{r_type} field and creates an addend field.
2124 #define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
2125 if (ptr && bfd_asymbol_bfd(ptr) == abfd \
2126 && !bfd_is_com_section(ptr->section) \
2127 && !(ptr->flags & BSF_OLD_COMMON)) \
2129 cache_ptr->addend = -(ptr->section->vma + ptr->value); \
2132 cache_ptr->addend = 0; \
2137 DEFUN(coff_slurp_reloc_table,(abfd, asect, symbols),
2142 RELOC *native_relocs;
2143 arelent *reloc_cache;
2148 if (asect->relocation)
2150 if (asect->reloc_count == 0)
2152 if (asect->flags & SEC_CONSTRUCTOR)
2154 if (!coff_slurp_symbol_table(abfd))
2157 (RELOC *) buy_and_read(abfd,
2161 asect->reloc_count));
2162 reloc_cache = (arelent *)
2163 bfd_alloc(abfd, (size_t) (asect->reloc_count * sizeof(arelent)));
2165 if (reloc_cache == NULL) {
2166 bfd_error = no_memory;
2171 for (idx = 0; idx < asect->reloc_count; idx ++)
2173 #ifdef RELOC_PROCESSING
2174 struct internal_reloc dst;
2175 struct external_reloc *src;
2177 cache_ptr = reloc_cache + idx;
2178 src = native_relocs + idx;
2179 bfd_swap_reloc_in(abfd, src, &dst);
2181 RELOC_PROCESSING(cache_ptr, &dst, symbols, abfd, asect);
2183 struct internal_reloc dst;
2185 struct external_reloc *src;
2187 cache_ptr = reloc_cache + idx;
2188 src = native_relocs + idx;
2190 bfd_swap_reloc_in(abfd, src, &dst);
2193 cache_ptr->address = dst.r_vaddr;
2195 if (dst.r_symndx != -1)
2197 /* @@ Should never be greater than count of symbols! */
2198 if (dst.r_symndx >= obj_conv_table_size (abfd))
2200 cache_ptr->sym_ptr_ptr = symbols + obj_convert(abfd)[dst.r_symndx];
2201 ptr = *(cache_ptr->sym_ptr_ptr);
2205 cache_ptr->sym_ptr_ptr= bfd_abs_section.symbol_ptr_ptr;
2210 The symbols definitions that we have read in have been
2211 relocated as if their sections started at 0. But the offsets
2212 refering to the symbols in the raw data have not been
2213 modified, so we have to have a negative addend to compensate.
2215 Note that symbols which used to be common must be left alone */
2217 /* Calculate any reloc addend by looking at the symbol */
2218 CALC_ADDEND(abfd, ptr, dst, cache_ptr);
2220 cache_ptr->address -= asect->vma;
2221 /* !! cache_ptr->section = (asection *) NULL;*/
2223 /* Fill in the cache_ptr->howto field from dst.r_type */
2224 RTYPE2HOWTO(cache_ptr, &dst);
2229 asect->relocation = reloc_cache;
2234 /* This is stupid. This function should be a boolean predicate */
2236 DEFUN(coff_canonicalize_reloc, (abfd, section, relptr, symbols),
2239 arelent **relptr AND
2242 arelent *tblptr = section->relocation;
2243 unsigned int count = 0;
2246 if (section->flags & SEC_CONSTRUCTOR)
2248 /* this section has relocs made up by us, they are not in the
2249 file, so take them out of their chain and place them into
2250 the data area provided */
2251 arelent_chain *chain = section->constructor_chain;
2252 for (count = 0; count < section->reloc_count; count ++)
2254 *relptr ++ = &chain->relent;
2255 chain = chain->next;
2261 coff_slurp_reloc_table(abfd, section, symbols);
2264 tblptr = section->relocation;
2268 for (; count++ < section->reloc_count;)
2269 *relptr++ = tblptr++;
2274 return section->reloc_count;
2279 coff_sym_filepos(abfd)
2282 return obj_sym_filepos(abfd);
2286 #ifndef coff_reloc16_estimate
2287 #define coff_reloc16_estimate dummy_reloc16_estimate
2290 dummy_reloc16_estimate(input_section, symbols, reloc, shrink)
2291 asection *input_section;
2294 unsigned int shrink;
2301 #ifndef coff_reloc16_extra_cases
2302 #define coff_reloc16_extra_cases dummy_reloc16_extra_cases
2303 /* This works even if abort is not declared in any header file. */
2305 dummy_reloc16_extra_cases (abfd, seclet, reloc, data, src_ptr, dst_ptr)
2307 struct bfd_seclet *seclet;
2310 unsigned int *src_ptr;
2311 unsigned int *dst_ptr;
2313 fprintf(stderr, "%s\n", reloc->howto->name);
2318 static CONST bfd_coff_backend_data bfd_coff_std_swap_table = {
2319 coff_swap_aux_in, coff_swap_sym_in, coff_swap_lineno_in,
2320 coff_swap_aux_out, coff_swap_sym_out,
2321 coff_swap_lineno_out, coff_swap_reloc_out,
2322 coff_swap_filehdr_out, coff_swap_aouthdr_out,
2323 coff_swap_scnhdr_out,
2324 FILHSZ, AOUTSZ, SCNHSZ, SYMESZ, AUXESZ, LINESZ,
2325 #ifdef COFF_LONG_FILENAMES
2330 coff_swap_filehdr_in, coff_swap_aouthdr_in, coff_swap_scnhdr_in,
2331 coff_bad_format_hook, coff_set_arch_mach_hook, coff_mkobject_hook,
2332 styp_to_sec_flags, coff_make_section_hook, coff_set_alignment_hook,
2333 coff_slurp_symbol_table, symname_in_debug_hook,
2334 coff_reloc16_extra_cases, coff_reloc16_estimate
2337 #define coff_core_file_failing_command _bfd_dummy_core_file_failing_command
2338 #define coff_core_file_failing_signal _bfd_dummy_core_file_failing_signal
2339 #define coff_core_file_matches_executable_p _bfd_dummy_core_file_matches_executable_p
2340 #define coff_slurp_armap bfd_slurp_coff_armap
2341 #define coff_slurp_extended_name_table _bfd_slurp_extended_name_table
2342 #define coff_truncate_arname bfd_dont_truncate_arname
2343 #define coff_openr_next_archived_file bfd_generic_openr_next_archived_file
2344 #define coff_generic_stat_arch_elt bfd_generic_stat_arch_elt
2345 #define coff_get_section_contents bfd_generic_get_section_contents
2346 #define coff_close_and_cleanup bfd_generic_close_and_cleanup
2348 #define coff_bfd_debug_info_start bfd_void
2349 #define coff_bfd_debug_info_end bfd_void
2350 #define coff_bfd_debug_info_accumulate \
2351 (void (*) PARAMS ((bfd *, struct sec *))) bfd_void
2352 #define coff_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents
2353 #define coff_bfd_relax_section bfd_generic_relax_section
2354 #define coff_bfd_seclet_link bfd_generic_seclet_link
2355 #define coff_bfd_reloc_type_lookup \
2356 ((CONST struct reloc_howto_struct *(*) PARAMS ((bfd *, bfd_reloc_code_real_type))) bfd_nullvoidptr)