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* config/tc-m68k.c (relaxable_symbol): Only treat external symbols
[deliverable/binutils-gdb.git] / gas / write.c
CommitLineData
252b5132 1/* write.c - emit .o file
f7e42eb4
NC		 2 Copyright 1986, 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
3 1998, 1999, 2000, 2001
252b5132
RH		 4 Free Software Foundation, Inc.
5
6 This file is part of GAS, the GNU Assembler.
7
8 GAS is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
11 any later version.
12
13 GAS is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with GAS; see the file COPYING. If not, write to the Free
20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
21 02111-1307, USA. */
22
efaf0ba4 23/* This thing should be set up to do byteordering correctly. But... */
252b5132
RH		 24
25#include "as.h"
26#include "subsegs.h"
27#include "obstack.h"
28#include "output-file.h"
220e750f 29#include "dwarf2dbg.h"
252b5132
RH		 30
31/* This looks like a good idea. Let's try turning it on always, for now. */
32#undef BFD_FAST_SECTION_FILL
33#define BFD_FAST_SECTION_FILL
34
252b5132
RH		 35#ifndef TC_ADJUST_RELOC_COUNT
36#define TC_ADJUST_RELOC_COUNT(FIXP,COUNT)
37#endif
38
39#ifndef TC_FORCE_RELOCATION
40#define TC_FORCE_RELOCATION(FIXP) 0
41#endif
42
43#ifndef TC_FORCE_RELOCATION_SECTION
44#define TC_FORCE_RELOCATION_SECTION(FIXP,SEG) TC_FORCE_RELOCATION(FIXP)
45#endif
46
58a77e41
EC		 47#ifndef TC_LINKRELAX_FIXUP
48#define TC_LINKRELAX_FIXUP(SEG) 1
49#endif
50
8f36cd18
AO		 51#ifndef TC_FIX_ADJUSTABLE
52#define TC_FIX_ADJUSTABLE(fix) 1
53#endif
ef99799a 54
252b5132
RH		 55#ifndef MD_PCREL_FROM_SECTION
56#define MD_PCREL_FROM_SECTION(FIXP, SEC) md_pcrel_from(FIXP)
57#endif
58
59#ifndef WORKING_DOT_WORD
60extern CONST int md_short_jump_size;
61extern CONST int md_long_jump_size;
62#endif
63
e46d99eb
AM		 64/* Used to control final evaluation of expressions that are more
65 complex than symbol + constant. 1 means set final value for simple
66 expressions, 2 means set final value for more complex expressions. */
67int finalize_syms = 1;
68
252b5132
RH		 69int symbol_table_frozen;
70void print_fixup PARAMS ((fixS *));
71
72#ifdef BFD_ASSEMBLER
73static void renumber_sections PARAMS ((bfd *, asection *, PTR));
74
75/* We generally attach relocs to frag chains. However, after we have
76 chained these all together into a segment, any relocs we add after
77 that must be attached to a segment. This will include relocs added
78 in md_estimate_size_for_relax, for example. */
79static int frags_chained = 0;
80#endif
81
82#ifndef BFD_ASSEMBLER
83
84#ifndef MANY_SEGMENTS
85struct frag *text_frag_root;
86struct frag *data_frag_root;
87struct frag *bss_frag_root;
88
efaf0ba4
NC		 89struct frag *text_last_frag; /* Last frag in segment. */
90struct frag *data_last_frag; /* Last frag in segment. */
91static struct frag *bss_last_frag; /* Last frag in segment. */
252b5132
RH		 92#endif
93
94#ifndef BFD
95static object_headers headers;
96#endif
97
98long string_byte_count;
efaf0ba4 99char *next_object_file_charP; /* Tracks object file bytes. */
252b5132
RH		 100
101#ifndef OBJ_VMS
102int magic_number_for_object_file = DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE;
103#endif
104
efaf0ba4 105#endif /* BFD_ASSEMBLER */
252b5132
RH		 106
107static int n_fixups;
108
109#ifdef BFD_ASSEMBLER
110static fixS *fix_new_internal PARAMS ((fragS *, int where, int size,
111 symbolS *add, symbolS *sub,
112 offsetT offset, int pcrel,
113 bfd_reloc_code_real_type r_type));
114#else
115static fixS *fix_new_internal PARAMS ((fragS *, int where, int size,
116 symbolS *add, symbolS *sub,
117 offsetT offset, int pcrel,
118 int r_type));
119#endif
120#if defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS))
121static long fixup_segment PARAMS ((fixS * fixP, segT this_segment_type));
122#endif
123static relax_addressT relax_align PARAMS ((relax_addressT addr, int align));
124#if defined (BFD_ASSEMBLER) || ! defined (BFD)
125static fragS *chain_frchains_together_1 PARAMS ((segT, struct frchain *));
126#endif
127#ifdef BFD_ASSEMBLER
128static void chain_frchains_together PARAMS ((bfd *, segT, PTR));
129static void cvt_frag_to_fill PARAMS ((segT, fragS *));
252b5132
RH		 130static void adjust_reloc_syms PARAMS ((bfd *, asection *, PTR));
131static void write_relocs PARAMS ((bfd *, asection *, PTR));
132static void write_contents PARAMS ((bfd *, asection *, PTR));
133static void set_symtab PARAMS ((void));
134#endif
135#if defined (BFD_ASSEMBLER) || (! defined (BFD) && ! defined (OBJ_AOUT))
136static void merge_data_into_text PARAMS ((void));
137#endif
138#if ! defined (BFD_ASSEMBLER) && ! defined (BFD)
139static void cvt_frag_to_fill PARAMS ((object_headers *, segT, fragS *));
140static void remove_subsegs PARAMS ((frchainS *, int, fragS **, fragS **));
141static void relax_and_size_all_segments PARAMS ((void));
142#endif
6aa4f516 143#if defined (BFD_ASSEMBLER) && defined (OBJ_COFF) && defined (TE_GO32)
dbddefbf
NC		 144static void set_segment_vma PARAMS ((bfd *, asection *, PTR));
145#endif
252b5132 146
efaf0ba4
NC		 147/* Create a fixS in obstack 'notes'. */
148
252b5132
RH		 149static fixS *
150fix_new_internal (frag, where, size, add_symbol, sub_symbol, offset, pcrel,
151 r_type)
efaf0ba4
NC		 152 fragS *frag; /* Which frag? */
153 int where; /* Where in that frag? */
154 int size; /* 1, 2, or 4 usually. */
155 symbolS *add_symbol; /* X_add_symbol. */
156 symbolS *sub_symbol; /* X_op_symbol. */
157 offsetT offset; /* X_add_number. */
158 int pcrel; /* TRUE if PC-relative relocation. */
252b5132 159#ifdef BFD_ASSEMBLER
efaf0ba4 160 bfd_reloc_code_real_type r_type; /* Relocation type. */
252b5132 161#else
efaf0ba4 162 int r_type; /* Relocation type. */
252b5132
RH		 163#endif
164{
165 fixS *fixP;
166
167 n_fixups++;
168
169 fixP = (fixS *) obstack_alloc (&notes, sizeof (fixS));
170
171 fixP->fx_frag = frag;
172 fixP->fx_where = where;
173 fixP->fx_size = size;
174 /* We've made fx_size a narrow field; check that it's wide enough. */
175 if (fixP->fx_size != size)
176 {
177 as_bad (_("field fx_size too small to hold %d"), size);
178 abort ();
179 }
180 fixP->fx_addsy = add_symbol;
181 fixP->fx_subsy = sub_symbol;
182 fixP->fx_offset = offset;
183 fixP->fx_pcrel = pcrel;
184 fixP->fx_plt = 0;
185#if defined(NEED_FX_R_TYPE) || defined (BFD_ASSEMBLER)
186 fixP->fx_r_type = r_type;
187#endif
188 fixP->fx_im_disp = 0;
189 fixP->fx_pcrel_adjust = 0;
190 fixP->fx_bit_fixP = 0;
191 fixP->fx_addnumber = 0;
192 fixP->fx_tcbit = 0;
193 fixP->fx_done = 0;
194 fixP->fx_no_overflow = 0;
195 fixP->fx_signed = 0;
196
197#ifdef USING_CGEN
198 fixP->fx_cgen.insn = NULL;
199 fixP->fx_cgen.opinfo = 0;
200#endif
201
202#ifdef TC_FIX_TYPE
efaf0ba4 203 TC_INIT_FIX_DATA (fixP);
252b5132
RH		 204#endif
205
206 as_where (&fixP->fx_file, &fixP->fx_line);
207
208 /* Usually, we want relocs sorted numerically, but while
209 comparing to older versions of gas that have relocs
210 reverse sorted, it is convenient to have this compile
efaf0ba4 211 time option. xoxorich. */
252b5132
RH		 212 {
213
214#ifdef BFD_ASSEMBLER
215 fixS **seg_fix_rootP = (frags_chained
216 ? &seg_info (now_seg)->fix_root
217 : &frchain_now->fix_root);
218 fixS **seg_fix_tailP = (frags_chained
219 ? &seg_info (now_seg)->fix_tail
220 : &frchain_now->fix_tail);
221#endif
222
223#ifdef REVERSE_SORT_RELOCS
224
225 fixP->fx_next = *seg_fix_rootP;
226 *seg_fix_rootP = fixP;
227
efaf0ba4 228#else /* REVERSE_SORT_RELOCS */
252b5132
RH		 229
230 fixP->fx_next = NULL;
231
232 if (*seg_fix_tailP)
233 (*seg_fix_tailP)->fx_next = fixP;
234 else
235 *seg_fix_rootP = fixP;
236 *seg_fix_tailP = fixP;
237
efaf0ba4 238#endif /* REVERSE_SORT_RELOCS */
252b5132
RH		 239 }
240
241 return fixP;
242}
243
244/* Create a fixup relative to a symbol (plus a constant). */
245
246fixS *
247fix_new (frag, where, size, add_symbol, offset, pcrel, r_type)
efaf0ba4
NC		 248 fragS *frag; /* Which frag? */
249 int where; /* Where in that frag? */
250 int size; /* 1, 2, or 4 usually. */
251 symbolS *add_symbol; /* X_add_symbol. */
252 offsetT offset; /* X_add_number. */
253 int pcrel; /* TRUE if PC-relative relocation. */
252b5132 254#ifdef BFD_ASSEMBLER
efaf0ba4 255 bfd_reloc_code_real_type r_type; /* Relocation type. */
252b5132 256#else
efaf0ba4 257 int r_type; /* Relocation type. */
252b5132
RH		 258#endif
259{
260 return fix_new_internal (frag, where, size, add_symbol,
261 (symbolS *) NULL, offset, pcrel, r_type);
262}
263
264/* Create a fixup for an expression. Currently we only support fixups
265 for difference expressions. That is itself more than most object
266 file formats support anyhow. */
267
268fixS *
269fix_new_exp (frag, where, size, exp, pcrel, r_type)
efaf0ba4
NC		 270 fragS *frag; /* Which frag? */
271 int where; /* Where in that frag? */
272 int size; /* 1, 2, or 4 usually. */
252b5132 273 expressionS *exp; /* Expression. */
efaf0ba4 274 int pcrel; /* TRUE if PC-relative relocation. */
252b5132 275#ifdef BFD_ASSEMBLER
efaf0ba4 276 bfd_reloc_code_real_type r_type; /* Relocation type. */
252b5132 277#else
efaf0ba4 278 int r_type; /* Relocation type. */
252b5132
RH		 279#endif
280{
281 symbolS *add = NULL;
282 symbolS *sub = NULL;
283 offsetT off = 0;
284
285 switch (exp->X_op)
286 {
287 case O_absent:
288 break;
289
37006e43
NC		 290 case O_register:
291 as_bad (_("register value used as expression"));
292 break;
293
252b5132
RH		 294 case O_add:
295 /* This comes up when _GLOBAL_OFFSET_TABLE_+(.-L0) is read, if
296 the difference expression cannot immediately be reduced. */
297 {
298 symbolS *stmp = make_expr_symbol (exp);
58a77e41 299
252b5132
RH		 300 exp->X_op = O_symbol;
301 exp->X_op_symbol = 0;
302 exp->X_add_symbol = stmp;
303 exp->X_add_number = 0;
58a77e41 304
252b5132
RH		 305 return fix_new_exp (frag, where, size, exp, pcrel, r_type);
306 }
307
308 case O_symbol_rva:
309 add = exp->X_add_symbol;
310 off = exp->X_add_number;
311
312#if defined(BFD_ASSEMBLER)
313 r_type = BFD_RELOC_RVA;
314#else
315#if defined(TC_RVA_RELOC)
316 r_type = TC_RVA_RELOC;
317#else
efaf0ba4 318 as_fatal (_("rva not supported"));
252b5132
RH		 319#endif
320#endif
321 break;
322
323 case O_uminus:
324 sub = exp->X_add_symbol;
325 off = exp->X_add_number;
326 break;
327
328 case O_subtract:
329 sub = exp->X_op_symbol;
330 /* Fall through. */
331 case O_symbol:
332 add = exp->X_add_symbol;
efaf0ba4 333 /* Fall through. */
252b5132
RH		 334 case O_constant:
335 off = exp->X_add_number;
336 break;
337
338 default:
339 add = make_expr_symbol (exp);
340 break;
341 }
342
efaf0ba4 343 return fix_new_internal (frag, where, size, add, sub, off, pcrel, r_type);
252b5132
RH		 344}
345
346/* Append a string onto another string, bumping the pointer along. */
347void
348append (charPP, fromP, length)
349 char **charPP;
350 char *fromP;
351 unsigned long length;
352{
efaf0ba4 353 /* Don't trust memcpy() of 0 chars. */
252b5132
RH		 354 if (length == 0)
355 return;
356
357 memcpy (*charPP, fromP, length);
358 *charPP += length;
359}
360
361#ifndef BFD_ASSEMBLER
362int section_alignment[SEG_MAXIMUM_ORDINAL];
363#endif
364
efaf0ba4
NC		 365/* This routine records the largest alignment seen for each segment.
366 If the beginning of the segment is aligned on the worst-case
367 boundary, all of the other alignments within it will work. At
368 least one object format really uses this info. */
369
252b5132
RH		 370void
371record_alignment (seg, align)
efaf0ba4 372 /* Segment to which alignment pertains. */
252b5132
RH		 373 segT seg;
374 /* Alignment, as a power of 2 (e.g., 1 => 2-byte boundary, 2 => 4-byte
375 boundary, etc.) */
376 int align;
377{
378 if (seg == absolute_section)
379 return;
380#ifdef BFD_ASSEMBLER
381 if ((unsigned int) align > bfd_get_section_alignment (stdoutput, seg))
382 bfd_set_section_alignment (stdoutput, seg, align);
383#else
384 if (align > section_alignment[(int) seg])
385 section_alignment[(int) seg] = align;
386#endif
387}
388
0a9ef439
RH		 389int
390get_recorded_alignment (seg)
391 segT seg;
392{
393 if (seg == absolute_section)
394 return 0;
395#ifdef BFD_ASSEMBLER
396 return bfd_get_section_alignment (stdoutput, seg);
397#else
398 return section_alignment[(int) seg];
399#endif
400}
401
252b5132
RH		 402#ifdef BFD_ASSEMBLER
403
404/* Reset the section indices after removing the gas created sections. */
405
406static void
407renumber_sections (abfd, sec, countparg)
ab9da554 408 bfd *abfd ATTRIBUTE_UNUSED;
252b5132
RH		 409 asection *sec;
410 PTR countparg;
411{
412 int *countp = (int *) countparg;
413
414 sec->index = *countp;
415 ++*countp;
416}
417
efaf0ba4 418#endif /* defined (BFD_ASSEMBLER) */
252b5132
RH		 419
420#if defined (BFD_ASSEMBLER) || ! defined (BFD)
421
422static fragS *
423chain_frchains_together_1 (section, frchp)
424 segT section;
425 struct frchain *frchp;
426{
427 fragS dummy, *prev_frag = &dummy;
428#ifdef BFD_ASSEMBLER
429 fixS fix_dummy, *prev_fix = &fix_dummy;
430#endif
431
432 for (; frchp && frchp->frch_seg == section; frchp = frchp->frch_next)
433 {
434 prev_frag->fr_next = frchp->frch_root;
435 prev_frag = frchp->frch_last;
436 assert (prev_frag->fr_type != 0);
437#ifdef BFD_ASSEMBLER
438 if (frchp->fix_root != (fixS *) NULL)
439 {
440 if (seg_info (section)->fix_root == (fixS *) NULL)
441 seg_info (section)->fix_root = frchp->fix_root;
442 prev_fix->fx_next = frchp->fix_root;
443 seg_info (section)->fix_tail = frchp->fix_tail;
444 prev_fix = frchp->fix_tail;
445 }
446#endif
447 }
448 assert (prev_frag->fr_type != 0);
449 prev_frag->fr_next = 0;
450 return prev_frag;
451}
452
453#endif
454
455#ifdef BFD_ASSEMBLER
456
457static void
458chain_frchains_together (abfd, section, xxx)
ab9da554 459 bfd *abfd ATTRIBUTE_UNUSED;
252b5132 460 segT section;
ab9da554 461 PTR xxx ATTRIBUTE_UNUSED;
252b5132
RH		 462{
463 segment_info_type *info;
464
465 /* BFD may have introduced its own sections without using
466 subseg_new, so it is possible that seg_info is NULL. */
467 info = seg_info (section);
468 if (info != (segment_info_type *) NULL)
efaf0ba4
NC		 469 info->frchainP->frch_last
470 = chain_frchains_together_1 (section, info->frchainP);
252b5132
RH		 471
472 /* Now that we've chained the frags together, we must add new fixups
473 to the segment, not to the frag chain. */
474 frags_chained = 1;
475}
476
477#endif
478
479#if !defined (BFD) && !defined (BFD_ASSEMBLER)
480
481static void
482remove_subsegs (head, seg, root, last)
483 frchainS *head;
484 int seg;
485 fragS **root;
486 fragS **last;
487{
488 *root = head->frch_root;
489 *last = chain_frchains_together_1 (seg, head);
490}
491
efaf0ba4 492#endif /* BFD */
252b5132
RH		 493
494#if defined (BFD_ASSEMBLER) || !defined (BFD)
495
496#ifdef BFD_ASSEMBLER
497static void
498cvt_frag_to_fill (sec, fragP)
efaf0ba4 499 segT sec ATTRIBUTE_UNUSED;
252b5132
RH		 500 fragS *fragP;
501#else
502static void
503cvt_frag_to_fill (headersP, sec, fragP)
504 object_headers *headersP;
505 segT sec;
506 fragS *fragP;
507#endif
508{
509 switch (fragP->fr_type)
510 {
511 case rs_align:
512 case rs_align_code:
0a9ef439 513 case rs_align_test:
252b5132
RH		 514 case rs_org:
515 case rs_space:
516#ifdef HANDLE_ALIGN
517 HANDLE_ALIGN (fragP);
518#endif
519 know (fragP->fr_next != NULL);
520 fragP->fr_offset = (fragP->fr_next->fr_address
521 - fragP->fr_address
522 - fragP->fr_fix) / fragP->fr_var;
523 if (fragP->fr_offset < 0)
524 {
14ad458a
ILT		 525 as_bad_where (fragP->fr_file, fragP->fr_line,
526 _("attempt to .org/.space backwards? (%ld)"),
527 (long) fragP->fr_offset);
252b5132
RH		 528 }
529 fragP->fr_type = rs_fill;
530 break;
531
532 case rs_fill:
533 break;
534
535 case rs_leb128:
536 {
537 valueT value = S_GET_VALUE (fragP->fr_symbol);
538 int size;
539
540 size = output_leb128 (fragP->fr_literal + fragP->fr_fix, value,
541 fragP->fr_subtype);
542
543 fragP->fr_fix += size;
544 fragP->fr_type = rs_fill;
545 fragP->fr_var = 0;
546 fragP->fr_offset = 0;
547 fragP->fr_symbol = NULL;
548 }
549 break;
550
551 case rs_cfa:
552 eh_frame_convert_frag (fragP);
553 break;
554
220e750f
RH		 555 case rs_dwarf2dbg:
556 dwarf2dbg_convert_frag (fragP);
557 break;
558
252b5132
RH		 559 case rs_machine_dependent:
560#ifdef BFD_ASSEMBLER
561 md_convert_frag (stdoutput, sec, fragP);
562#else
563 md_convert_frag (headersP, sec, fragP);
564#endif
565
566 assert (fragP->fr_next == NULL
567 || ((offsetT) (fragP->fr_next->fr_address - fragP->fr_address)
568 == fragP->fr_fix));
569
efaf0ba4
NC		 570 /* After md_convert_frag, we make the frag into a ".space 0".
571 md_convert_frag() should set up any fixSs and constants
572 required. */
252b5132
RH		 573 frag_wane (fragP);
574 break;
575
576#ifndef WORKING_DOT_WORD
577 case rs_broken_word:
578 {
579 struct broken_word *lie;
580
581 if (fragP->fr_subtype)
582 {
583 fragP->fr_fix += md_short_jump_size;
584 for (lie = (struct broken_word *) (fragP->fr_symbol);
585 lie && lie->dispfrag == fragP;
586 lie = lie->next_broken_word)
587 if (lie->added == 1)
588 fragP->fr_fix += md_long_jump_size;
589 }
590 frag_wane (fragP);
591 }
592 break;
593#endif
594
595 default:
596 BAD_CASE (fragP->fr_type);
597 break;
598 }
599}
600
efaf0ba4 601#endif /* defined (BFD_ASSEMBLER) || !defined (BFD) */
252b5132
RH		 602
603#ifdef BFD_ASSEMBLER
e46d99eb 604static void relax_seg PARAMS ((bfd *, asection *, PTR));
252b5132 605static void
e46d99eb
AM		 606relax_seg (abfd, sec, xxx)
607 bfd *abfd ATTRIBUTE_UNUSED;
608 asection *sec;
609 PTR xxx;
610{
611 segment_info_type *seginfo = seg_info (sec);
612
613 if (seginfo && seginfo->frchainP
614 && relax_segment (seginfo->frchainP->frch_root, sec))
615 {
616 int *result = (int *) xxx;
617 *result = 1;
618 }
619}
620
621static void size_seg PARAMS ((bfd *, asection *, PTR));
622static void
623size_seg (abfd, sec, xxx)
252b5132
RH		 624 bfd *abfd;
625 asection *sec;
ab9da554 626 PTR xxx ATTRIBUTE_UNUSED;
252b5132
RH		 627{
628 flagword flags;
629 fragS *fragp;
630 segment_info_type *seginfo;
631 int x;
632 valueT size, newsize;
633
634 subseg_change (sec, 0);
635
252b5132
RH		 636 seginfo = seg_info (sec);
637 if (seginfo && seginfo->frchainP)
638 {
252b5132
RH		 639 for (fragp = seginfo->frchainP->frch_root; fragp; fragp = fragp->fr_next)
640 cvt_frag_to_fill (sec, fragp);
641 for (fragp = seginfo->frchainP->frch_root;
642 fragp->fr_next;
643 fragp = fragp->fr_next)
efaf0ba4
NC		 644 /* Walk to last elt. */
645 ;
252b5132
RH		 646 size = fragp->fr_address + fragp->fr_fix;
647 }
648 else
649 size = 0;
650
e46d99eb
AM		 651 flags = bfd_get_section_flags (abfd, sec);
652
252b5132
RH		 653 if (size > 0 && ! seginfo->bss)
654 flags |= SEC_HAS_CONTENTS;
655
656 /* @@ This is just an approximation. */
657 if (seginfo && seginfo->fix_root)
658 flags |= SEC_RELOC;
659 else
660 flags &= ~SEC_RELOC;
661 x = bfd_set_section_flags (abfd, sec, flags);
662 assert (x == true);
663
664 newsize = md_section_align (sec, size);
665 x = bfd_set_section_size (abfd, sec, newsize);
666 assert (x == true);
667
668 /* If the size had to be rounded up, add some padding in the last
669 non-empty frag. */
670 assert (newsize >= size);
671 if (size != newsize)
672 {
673 fragS *last = seginfo->frchainP->frch_last;
674 fragp = seginfo->frchainP->frch_root;
675 while (fragp->fr_next != last)
676 fragp = fragp->fr_next;
677 last->fr_address = size;
678 fragp->fr_offset += newsize - size;
679 }
680
681#ifdef tc_frob_section
682 tc_frob_section (sec);
683#endif
684#ifdef obj_frob_section
685 obj_frob_section (sec);
686#endif
687}
688
689#ifdef DEBUG2
690static void
691dump_section_relocs (abfd, sec, stream_)
e723ef7c 692 bfd *abfd ATTRIBUTE_UNUSED;
252b5132
RH		 693 asection *sec;
694 char *stream_;
695{
696 FILE *stream = (FILE *) stream_;
697 segment_info_type *seginfo = seg_info (sec);
698 fixS *fixp = seginfo->fix_root;
699
700 if (!fixp)
701 return;
702
703 fprintf (stream, "sec %s relocs:\n", sec->name);
704 while (fixp)
705 {
706 symbolS *s = fixp->fx_addsy;
e723ef7c
ILT		 707
708 fprintf (stream, " %08lx: type %d ", (unsigned long) fixp,
709 (int) fixp->fx_r_type);
710 if (s == NULL)
711 fprintf (stream, "no sym\n");
712 else
252b5132 713 {
e723ef7c
ILT		 714 print_symbol_value_1 (stream, s);
715 fprintf (stream, "\n");
252b5132 716 }
252b5132
RH		 717 fixp = fixp->fx_next;
718 }
719}
720#else
721#define dump_section_relocs(ABFD,SEC,STREAM) ((void) 0)
722#endif
723
724#ifndef EMIT_SECTION_SYMBOLS
725#define EMIT_SECTION_SYMBOLS 1
726#endif
727
728static void
729adjust_reloc_syms (abfd, sec, xxx)
ab9da554 730 bfd *abfd ATTRIBUTE_UNUSED;
252b5132 731 asection *sec;
ab9da554 732 PTR xxx ATTRIBUTE_UNUSED;
252b5132
RH		 733{
734 segment_info_type *seginfo = seg_info (sec);
735 fixS *fixp;
736
737 if (seginfo == NULL)
738 return;
739
740 dump_section_relocs (abfd, sec, stderr);
741
742 for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next)
743 if (fixp->fx_done)
efaf0ba4
NC		 744 /* Ignore it. */
745 ;
252b5132
RH		 746 else if (fixp->fx_addsy)
747 {
748 symbolS *sym;
749 asection *symsec;
750
751#ifdef DEBUG5
752 fprintf (stderr, "\n\nadjusting fixup:\n");
753 print_fixup (fixp);
754#endif
755
756 sym = fixp->fx_addsy;
757
758 /* All symbols should have already been resolved at this
759 point. It is possible to see unresolved expression
760 symbols, though, since they are not in the regular symbol
761 table. */
49309057 762 if (sym != NULL)
e46d99eb 763 resolve_symbol_value (sym, finalize_syms);
efaf0ba4 764
49309057 765 if (fixp->fx_subsy != NULL)
e46d99eb 766 resolve_symbol_value (fixp->fx_subsy, finalize_syms);
252b5132
RH		 767
768 /* If this symbol is equated to an undefined symbol, convert
769 the fixup to being against that symbol. */
49309057 770 if (sym != NULL && symbol_equated_p (sym)
252b5132
RH		 771 && (! S_IS_DEFINED (sym) || S_IS_COMMON (sym)))
772 {
49309057
ILT		 773 fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number;
774 sym = symbol_get_value_expression (sym)->X_add_symbol;
252b5132
RH		 775 fixp->fx_addsy = sym;
776 }
777
49309057 778 if (sym != NULL && symbol_mri_common_p (sym))
252b5132
RH		 779 {
780 /* These symbols are handled specially in fixup_segment. */
781 goto done;
782 }
783
784 symsec = S_GET_SEGMENT (sym);
785
786 if (symsec == NULL)
787 abort ();
efaf0ba4 788
252b5132
RH		 789 if (bfd_is_abs_section (symsec))
790 {
791 /* The fixup_segment routine will not use this symbol in a
792 relocation unless TC_FORCE_RELOCATION returns 1. */
793 if (TC_FORCE_RELOCATION (fixp))
794 {
49309057 795 symbol_mark_used_in_reloc (fixp->fx_addsy);
252b5132
RH		 796#ifdef UNDEFINED_DIFFERENCE_OK
797 if (fixp->fx_subsy != NULL)
49309057 798 symbol_mark_used_in_reloc (fixp->fx_subsy);
252b5132
RH		 799#endif
800 }
801 goto done;
802 }
803
804 /* If it's one of these sections, assume the symbol is
805 definitely going to be output. The code in
806 md_estimate_size_before_relax in tc-mips.c uses this test
807 as well, so if you change this code you should look at that
808 code. */
809 if (bfd_is_und_section (symsec)
810 || bfd_is_com_section (symsec))
811 {
49309057 812 symbol_mark_used_in_reloc (fixp->fx_addsy);
252b5132
RH		 813#ifdef UNDEFINED_DIFFERENCE_OK
814 /* We have the difference of an undefined symbol and some
815 other symbol. Make sure to mark the other symbol as used
816 in a relocation so that it will always be output. */
817 if (fixp->fx_subsy)
49309057 818 symbol_mark_used_in_reloc (fixp->fx_subsy);
252b5132
RH		 819#endif
820 goto done;
821 }
822
7565ed77
ILT		 823 /* Don't try to reduce relocs which refer to non-local symbols
824 in .linkonce sections. It can lead to confusion when a
825 debugging section refers to a .linkonce section. I hope
826 this will always be correct. */
827 if (symsec != sec && ! S_IS_LOCAL (sym))
252b5132
RH		 828 {
829 boolean linkonce;
830
831 linkonce = false;
832#ifdef BFD_ASSEMBLER
833 if ((bfd_get_section_flags (stdoutput, symsec) & SEC_LINK_ONCE)
834 != 0)
835 linkonce = true;
836#endif
837#ifdef OBJ_ELF
838 /* The GNU toolchain uses an extension for ELF: a section
839 beginning with the magic string .gnu.linkonce is a
840 linkonce section. */
841 if (strncmp (segment_name (symsec), ".gnu.linkonce",
842 sizeof ".gnu.linkonce" - 1) == 0)
843 linkonce = true;
844#endif
845
846 if (linkonce)
847 {
49309057 848 symbol_mark_used_in_reloc (fixp->fx_addsy);
252b5132
RH		 849#ifdef UNDEFINED_DIFFERENCE_OK
850 if (fixp->fx_subsy != NULL)
49309057 851 symbol_mark_used_in_reloc (fixp->fx_subsy);
252b5132
RH		 852#endif
853 goto done;
854 }
855 }
856
857 /* Since we're reducing to section symbols, don't attempt to reduce
858 anything that's already using one. */
49309057 859 if (symbol_section_p (sym))
252b5132 860 {
49309057 861 symbol_mark_used_in_reloc (fixp->fx_addsy);
252b5132
RH		 862 goto done;
863 }
864
865#ifdef BFD_ASSEMBLER
866 /* We can never adjust a reloc against a weak symbol. If we
867 did, and the weak symbol was overridden by a real symbol
868 somewhere else, then our relocation would be pointing at
869 the wrong area of memory. */
870 if (S_IS_WEAK (sym))
871 {
49309057 872 symbol_mark_used_in_reloc (fixp->fx_addsy);
252b5132
RH		 873 goto done;
874 }
f5fa8ca2
JJ		 875
876 /* Never adjust a reloc against local symbol in a merge section. */
877 if (symsec->flags & SEC_MERGE)
878 {
879 symbol_mark_used_in_reloc (fixp->fx_addsy);
880 goto done;
881 }
252b5132
RH		 882#endif
883
884 /* Is there some other reason we can't adjust this one? (E.g.,
885 call/bal links in i960-bout symbols.) */
886#ifdef obj_fix_adjustable
887 if (! obj_fix_adjustable (fixp))
888 {
49309057 889 symbol_mark_used_in_reloc (fixp->fx_addsy);
252b5132
RH		 890 goto done;
891 }
892#endif
893
894 /* Is there some other (target cpu dependent) reason we can't adjust
895 this one? (E.g. relocations involving function addresses on
896 the PA. */
897#ifdef tc_fix_adjustable
898 if (! tc_fix_adjustable (fixp))
899 {
49309057 900 symbol_mark_used_in_reloc (fixp->fx_addsy);
252b5132
RH		 901 goto done;
902 }
903#endif
904
905 /* If the section symbol isn't going to be output, the relocs
906 at least should still work. If not, figure out what to do
907 when we run into that case.
908
909 We refetch the segment when calling section_symbol, rather
910 than using symsec, because S_GET_VALUE may wind up changing
efaf0ba4 911 the section when it calls resolve_symbol_value. */
252b5132
RH		 912 fixp->fx_offset += S_GET_VALUE (sym);
913 fixp->fx_addsy = section_symbol (S_GET_SEGMENT (sym));
49309057 914 symbol_mark_used_in_reloc (fixp->fx_addsy);
e723ef7c
ILT		 915#ifdef DEBUG5
916 fprintf (stderr, "\nadjusted fixup:\n");
917 print_fixup (fixp);
918#endif
252b5132
RH		 919
920 done:
921 ;
922 }
efaf0ba4 923#if 1 /* def RELOC_REQUIRES_SYMBOL */
252b5132
RH		 924 else
925 {
926 /* There was no symbol required by this relocation. However,
927 BFD doesn't really handle relocations without symbols well.
928 (At least, the COFF support doesn't.) So for now we fake up
929 a local symbol in the absolute section. */
930
931 fixp->fx_addsy = section_symbol (absolute_section);
efaf0ba4
NC		 932#if 0
933 fixp->fx_addsy->sy_used_in_reloc = 1;
934#endif
252b5132
RH		 935 }
936#endif
937
938 dump_section_relocs (abfd, sec, stderr);
939}
940
941static void
942write_relocs (abfd, sec, xxx)
943 bfd *abfd;
944 asection *sec;
ab9da554 945 PTR xxx ATTRIBUTE_UNUSED;
252b5132
RH		 946{
947 segment_info_type *seginfo = seg_info (sec);
927781e2 948 unsigned int i;
252b5132
RH		 949 unsigned int n;
950 arelent **relocs;
951 fixS *fixp;
952 char *err;
953
954 /* If seginfo is NULL, we did not create this section; don't do
955 anything with it. */
956 if (seginfo == NULL)
957 return;
958
959 fixup_segment (seginfo->fix_root, sec);
960
961 n = 0;
962 for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next)
963 n++;
964
965#ifndef RELOC_EXPANSION_POSSIBLE
966 /* Set up reloc information as well. */
967 relocs = (arelent **) xmalloc (n * sizeof (arelent *));
efaf0ba4 968 memset ((char *) relocs, 0, n * sizeof (arelent *));
252b5132
RH		 969
970 i = 0;
971 for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next)
972 {
973 arelent *reloc;
974 bfd_reloc_status_type s;
975 symbolS *sym;
976
977 if (fixp->fx_done)
978 {
979 n--;
980 continue;
981 }
982
983 /* If this is an undefined symbol which was equated to another
984 symbol, then use generate the reloc against the latter symbol
985 rather than the former. */
986 sym = fixp->fx_addsy;
49309057 987 while (symbol_equated_p (sym)
252b5132
RH		 988 && (! S_IS_DEFINED (sym) || S_IS_COMMON (sym)))
989 {
990 symbolS *n;
991
992 /* We must avoid looping, as that can occur with a badly
993 written program. */
49309057 994 n = symbol_get_value_expression (sym)->X_add_symbol;
252b5132
RH		 995 if (n == sym)
996 break;
49309057 997 fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number;
252b5132
RH		 998 sym = n;
999 }
1000 fixp->fx_addsy = sym;
1001
1002 reloc = tc_gen_reloc (sec, fixp);
1003 if (!reloc)
1004 {
1005 n--;
1006 continue;
1007 }
1008
1009#if 0
1010 /* This test is triggered inappropriately for the SH. */
1011 if (fixp->fx_where + fixp->fx_size
1012 > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset)
1013 abort ();
1014#endif
1015
1016 s = bfd_install_relocation (stdoutput, reloc,
1017 fixp->fx_frag->fr_literal,
1018 fixp->fx_frag->fr_address,
1019 sec, &err);
1020 switch (s)
1021 {
1022 case bfd_reloc_ok:
1023 break;
1024 case bfd_reloc_overflow:
1025 as_bad_where (fixp->fx_file, fixp->fx_line, _("relocation overflow"));
1026 break;
1027 case bfd_reloc_outofrange:
1028 as_bad_where (fixp->fx_file, fixp->fx_line, _("relocation out of range"));
1029 break;
1030 default:
1031 as_fatal (_("%s:%u: bad return from bfd_install_relocation: %x"),
1032 fixp->fx_file, fixp->fx_line, s);
1033 }
1034 relocs[i++] = reloc;
1035 }
1036#else
1037 n = n * MAX_RELOC_EXPANSION;
1038 /* Set up reloc information as well. */
1039 relocs = (arelent **) xmalloc (n * sizeof (arelent *));
1040
1041 i = 0;
1042 for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next)
1043 {
1044 arelent **reloc;
1045 char *data;
1046 bfd_reloc_status_type s;
1047 symbolS *sym;
1048 int j;
1049
1050 if (fixp->fx_done)
1051 {
1052 n--;
1053 continue;
1054 }
1055
1056 /* If this is an undefined symbol which was equated to another
44852b19 1057 symbol, then generate the reloc against the latter symbol
252b5132
RH		 1058 rather than the former. */
1059 sym = fixp->fx_addsy;
49309057 1060 while (symbol_equated_p (sym)
252b5132 1061 && (! S_IS_DEFINED (sym) || S_IS_COMMON (sym)))
49309057 1062 sym = symbol_get_value_expression (sym)->X_add_symbol;
252b5132
RH		 1063 fixp->fx_addsy = sym;
1064
1065 reloc = tc_gen_reloc (sec, fixp);
1066
1067 for (j = 0; reloc[j]; j++)
1068 {
efaf0ba4
NC		 1069 relocs[i++] = reloc[j];
1070 assert (i <= n);
252b5132
RH		 1071 }
1072 data = fixp->fx_frag->fr_literal + fixp->fx_where;
1073 if (fixp->fx_where + fixp->fx_size
1074 > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset)
1075 as_bad_where (fixp->fx_file, fixp->fx_line,
1076 _("internal error: fixup not contained within frag"));
1077 for (j = 0; reloc[j]; j++)
efaf0ba4 1078 {
252b5132
RH		 1079 s = bfd_install_relocation (stdoutput, reloc[j],
1080 fixp->fx_frag->fr_literal,
1081 fixp->fx_frag->fr_address,
1082 sec, &err);
efaf0ba4 1083 switch (s)
252b5132
RH		 1084 {
1085 case bfd_reloc_ok:
1086 break;
1087 case bfd_reloc_overflow:
1088 as_bad_where (fixp->fx_file, fixp->fx_line,
1089 _("relocation overflow"));
1090 break;
1091 default:
1092 as_fatal (_("%s:%u: bad return from bfd_install_relocation"),
1093 fixp->fx_file, fixp->fx_line);
1094 }
efaf0ba4 1095 }
252b5132
RH		 1096 }
1097 n = i;
1098#endif
1099
1100#ifdef DEBUG4
1101 {
1102 int i, j, nsyms;
1103 asymbol **sympp;
1104 sympp = bfd_get_outsymbols (stdoutput);
1105 nsyms = bfd_get_symcount (stdoutput);
1106 for (i = 0; i < n; i++)
1107 if (((*relocs[i]->sym_ptr_ptr)->flags & BSF_SECTION_SYM) == 0)
1108 {
1109 for (j = 0; j < nsyms; j++)
1110 if (sympp[j] == *relocs[i]->sym_ptr_ptr)
1111 break;
1112 if (j == nsyms)
1113 abort ();
1114 }
1115 }
1116#endif
1117
1118 if (n)
1119 bfd_set_reloc (stdoutput, sec, relocs, n);
1120 else
1121 bfd_set_section_flags (abfd, sec,
1122 (bfd_get_section_flags (abfd, sec)
1123 & (flagword) ~SEC_RELOC));
1124
945a1a6b
ILT		 1125#ifdef SET_SECTION_RELOCS
1126 SET_SECTION_RELOCS (sec, relocs, n);
1127#endif
1128
252b5132
RH		 1129#ifdef DEBUG3
1130 {
1131 int i;
1132 arelent *r;
1133 asymbol *s;
1134 fprintf (stderr, "relocs for sec %s\n", sec->name);
1135 for (i = 0; i < n; i++)
1136 {
1137 r = relocs[i];
1138 s = *r->sym_ptr_ptr;
1139 fprintf (stderr, " reloc %2d @%08x off %4x : sym %-10s addend %x\n",
1140 i, r, r->address, s->name, r->addend);
1141 }
1142 }
1143#endif
1144}
1145
1146static void
1147write_contents (abfd, sec, xxx)
ab9da554 1148 bfd *abfd ATTRIBUTE_UNUSED;
252b5132 1149 asection *sec;
ab9da554 1150 PTR xxx ATTRIBUTE_UNUSED;
252b5132
RH		 1151{
1152 segment_info_type *seginfo = seg_info (sec);
1153 unsigned long offset = 0;
1154 fragS *f;
1155
1156 /* Write out the frags. */
1157 if (seginfo == NULL
efaf0ba4 1158 || !(bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS))
252b5132
RH		 1159 return;
1160
1161 for (f = seginfo->frchainP->frch_root;
1162 f;
1163 f = f->fr_next)
1164 {
1165 int x;
1166 unsigned long fill_size;
1167 char *fill_literal;
1168 long count;
1169
1170 assert (f->fr_type == rs_fill);
1171 if (f->fr_fix)
1172 {
1173 x = bfd_set_section_contents (stdoutput, sec,
1174 f->fr_literal, (file_ptr) offset,
1175 (bfd_size_type) f->fr_fix);
1176 if (x == false)
1177 {
1178 bfd_perror (stdoutput->filename);
1179 as_perror (_("FATAL: Can't write %s"), stdoutput->filename);
1180 exit (EXIT_FAILURE);
1181 }
1182 offset += f->fr_fix;
1183 }
1184 fill_literal = f->fr_literal + f->fr_fix;
1185 fill_size = f->fr_var;
1186 count = f->fr_offset;
1187 assert (count >= 0);
1188 if (fill_size && count)
1189 {
1190 char buf[256];
efaf0ba4 1191 if (fill_size > sizeof (buf))
252b5132 1192 {
efaf0ba4 1193 /* Do it the old way. Can this ever happen? */
252b5132
RH		 1194 while (count--)
1195 {
1196 x = bfd_set_section_contents (stdoutput, sec,
1197 fill_literal,
1198 (file_ptr) offset,
1199 (bfd_size_type) fill_size);
1200 if (x == false)
1201 {
1202 bfd_perror (stdoutput->filename);
efaf0ba4
NC		 1203 as_perror (_("FATAL: Can't write %s"),
1204 stdoutput->filename);
252b5132
RH		 1205 exit (EXIT_FAILURE);
1206 }
1207 offset += fill_size;
1208 }
1209 }
1210 else
1211 {
1212 /* Build a buffer full of fill objects and output it as
1213 often as necessary. This saves on the overhead of
1214 potentially lots of bfd_set_section_contents calls. */
1215 int n_per_buf, i;
1216 if (fill_size == 1)
1217 {
1218 n_per_buf = sizeof (buf);
1219 memset (buf, *fill_literal, n_per_buf);
1220 }
1221 else
1222 {
1223 char *bufp;
efaf0ba4 1224 n_per_buf = sizeof (buf) / fill_size;
252b5132 1225 for (i = n_per_buf, bufp = buf; i; i--, bufp += fill_size)
efaf0ba4 1226 memcpy (bufp, fill_literal, fill_size);
252b5132
RH		 1227 }
1228 for (; count > 0; count -= n_per_buf)
1229 {
1230 n_per_buf = n_per_buf > count ? count : n_per_buf;
efaf0ba4
NC		 1231 x = bfd_set_section_contents
1232 (stdoutput, sec, buf, (file_ptr) offset,
1233 (bfd_size_type) n_per_buf * fill_size);
252b5132
RH		 1234 if (x != true)
1235 as_fatal (_("Cannot write to output file."));
1236 offset += n_per_buf * fill_size;
1237 }
1238 }
1239 }
1240 }
1241}
1242#endif
1243
1244#if defined(BFD_ASSEMBLER) || (!defined (BFD) && !defined(OBJ_AOUT))
1245static void
1246merge_data_into_text ()
1247{
1248#if defined(BFD_ASSEMBLER) || defined(MANY_SEGMENTS)
1249 seg_info (text_section)->frchainP->frch_last->fr_next =
1250 seg_info (data_section)->frchainP->frch_root;
1251 seg_info (text_section)->frchainP->frch_last =
1252 seg_info (data_section)->frchainP->frch_last;
1253 seg_info (data_section)->frchainP = 0;
1254#else
1255 fixS *tmp;
1256
1257 text_last_frag->fr_next = data_frag_root;
1258 text_last_frag = data_last_frag;
1259 data_last_frag = NULL;
1260 data_frag_root = NULL;
1261 if (text_fix_root)
1262 {
1263 for (tmp = text_fix_root; tmp->fx_next; tmp = tmp->fx_next);;
1264 tmp->fx_next = data_fix_root;
1265 text_fix_tail = data_fix_tail;
1266 }
1267 else
1268 text_fix_root = data_fix_root;
1269 data_fix_root = NULL;
1270#endif
1271}
efaf0ba4 1272#endif /* BFD_ASSEMBLER || (! BFD && ! OBJ_AOUT) */
252b5132
RH		 1273
1274#if !defined (BFD_ASSEMBLER) && !defined (BFD)
1275static void
1276relax_and_size_all_segments ()
1277{
1278 fragS *fragP;
1279
1280 relax_segment (text_frag_root, SEG_TEXT);
1281 relax_segment (data_frag_root, SEG_DATA);
1282 relax_segment (bss_frag_root, SEG_BSS);
252b5132 1283
efaf0ba4 1284 /* Now the addresses of frags are correct within the segment. */
252b5132
RH		 1285 know (text_last_frag->fr_type == rs_fill && text_last_frag->fr_offset == 0);
1286 H_SET_TEXT_SIZE (&headers, text_last_frag->fr_address);
1287 text_last_frag->fr_address = H_GET_TEXT_SIZE (&headers);
1288
efaf0ba4
NC		 1289 /* Join the 2 segments into 1 huge segment.
1290 To do this, re-compute every rn_address in the SEG_DATA frags.
1291 Then join the data frags after the text frags.
58a77e41 1292
efaf0ba4 1293 Determine a_data [length of data segment]. */
252b5132
RH		 1294 if (data_frag_root)
1295 {
1296 register relax_addressT slide;
1297
efaf0ba4
NC		 1298 know ((text_last_frag->fr_type == rs_fill)
1299 && (text_last_frag->fr_offset == 0));
252b5132
RH		 1300
1301 H_SET_DATA_SIZE (&headers, data_last_frag->fr_address);
1302 data_last_frag->fr_address = H_GET_DATA_SIZE (&headers);
efaf0ba4 1303 slide = H_GET_TEXT_SIZE (&headers); /* & in file of the data segment. */
252b5132
RH		 1304#ifdef OBJ_BOUT
1305#define RoundUp(N,S) (((N)+(S)-1)&-(S))
1306 /* For b.out: If the data section has a strict alignment
1307 requirement, its load address in the .o file will be
1308 rounded up from the size of the text section. These
1309 two values are *not* the same! Similarly for the bss
1310 section.... */
1311 slide = RoundUp (slide, 1 << section_alignment[SEG_DATA]);
1312#endif
1313
1314 for (fragP = data_frag_root; fragP; fragP = fragP->fr_next)
efaf0ba4 1315 fragP->fr_address += slide;
252b5132
RH		 1316
1317 know (text_last_frag != 0);
1318 text_last_frag->fr_next = data_frag_root;
1319 }
1320 else
1321 {
1322 H_SET_DATA_SIZE (&headers, 0);
1323 }
1324
1325#ifdef OBJ_BOUT
1326 /* See above comments on b.out data section address. */
1327 {
1328 long bss_vma;
1329 if (data_last_frag == 0)
1330 bss_vma = H_GET_TEXT_SIZE (&headers);
1331 else
1332 bss_vma = data_last_frag->fr_address;
1333 bss_vma = RoundUp (bss_vma, 1 << section_alignment[SEG_BSS]);
1334 bss_address_frag.fr_address = bss_vma;
1335 }
efaf0ba4 1336#else /* ! OBJ_BOUT */
252b5132
RH		 1337 bss_address_frag.fr_address = (H_GET_TEXT_SIZE (&headers) +
1338 H_GET_DATA_SIZE (&headers));
1339
efaf0ba4 1340#endif /* ! OBJ_BOUT */
252b5132 1341
efaf0ba4 1342 /* Slide all the frags. */
252b5132
RH		 1343 if (bss_frag_root)
1344 {
1345 relax_addressT slide = bss_address_frag.fr_address;
1346
1347 for (fragP = bss_frag_root; fragP; fragP = fragP->fr_next)
efaf0ba4 1348 fragP->fr_address += slide;
252b5132
RH		 1349 }
1350
1351 if (bss_last_frag)
1352 H_SET_BSS_SIZE (&headers,
1353 bss_last_frag->fr_address - bss_frag_root->fr_address);
1354 else
1355 H_SET_BSS_SIZE (&headers, 0);
1356}
efaf0ba4 1357#endif /* ! BFD_ASSEMBLER && ! BFD */
252b5132
RH		 1358
1359#if defined (BFD_ASSEMBLER) || !defined (BFD)
1360
1361#ifdef BFD_ASSEMBLER
1362static void
1363set_symtab ()
1364{
1365 int nsyms;
1366 asymbol **asympp;
1367 symbolS *symp;
1368 boolean result;
1369 extern PTR bfd_alloc PARAMS ((bfd *, size_t));
1370
1371 /* Count symbols. We can't rely on a count made by the loop in
1372 write_object_file, because *_frob_file may add a new symbol or
1373 two. */
1374 nsyms = 0;
1375 for (symp = symbol_rootP; symp; symp = symbol_next (symp))
1376 nsyms++;
1377
1378 if (nsyms)
1379 {
1380 int i;
1381
1382 asympp = (asymbol **) bfd_alloc (stdoutput,
1383 nsyms * sizeof (asymbol *));
1384 symp = symbol_rootP;
1385 for (i = 0; i < nsyms; i++, symp = symbol_next (symp))
1386 {
49309057
ILT		 1387 asympp[i] = symbol_get_bfdsym (symp);
1388 symbol_mark_written (symp);
252b5132
RH		 1389 }
1390 }
1391 else
1392 asympp = 0;
1393 result = bfd_set_symtab (stdoutput, asympp, nsyms);
1394 assert (result == true);
1395 symbol_table_frozen = 1;
1396}
1397#endif
1398
6aa4f516 1399#if defined (BFD_ASSEMBLER) && defined (OBJ_COFF) && defined (TE_GO32)
dbddefbf
NC		 1400static void
1401set_segment_vma (abfd, sec, xxx)
1402 bfd *abfd;
1403 asection *sec;
1404 PTR xxx ATTRIBUTE_UNUSED;
1405{
1406 static bfd_vma addr = 0;
efaf0ba4 1407
dbddefbf
NC		 1408 bfd_set_section_vma (abfd, sec, addr);
1409 addr += bfd_section_size (abfd, sec);
1410}
efaf0ba4 1411#endif /* BFD_ASSEMBLER && OBJ_COFF && !TE_PE */
dbddefbf 1412
252b5132
RH		 1413/* Finish the subsegments. After every sub-segment, we fake an
1414 ".align ...". This conforms to BSD4.2 brane-damage. We then fake
1415 ".fill 0" because that is the kind of frag that requires least
1416 thought. ".align" frags like to have a following frag since that
1417 makes calculating their intended length trivial. */
1418
1419#ifndef SUB_SEGMENT_ALIGN
1420#ifdef BFD_ASSEMBLER
1421#define SUB_SEGMENT_ALIGN(SEG) (0)
1422#else
1423#define SUB_SEGMENT_ALIGN(SEG) (2)
1424#endif
1425#endif
1426
1427void
1428subsegs_finish ()
1429{
1430 struct frchain *frchainP;
1431
1432 for (frchainP = frchain_root; frchainP; frchainP = frchainP->frch_next)
1433 {
0a9ef439
RH		 1434 int alignment;
1435
252b5132
RH		 1436 subseg_set (frchainP->frch_seg, frchainP->frch_subseg);
1437
1438 /* This now gets called even if we had errors. In that case,
1439 any alignment is meaningless, and, moreover, will look weird
1440 if we are generating a listing. */
0a9ef439
RH		 1441 alignment = had_errors () ? 0 : SUB_SEGMENT_ALIGN (now_seg);
1442
1443 /* The last subsegment gets an aligment corresponding to the
1444 alignment of the section. This allows proper nop-filling
1445 at the end of code-bearing sections. */
1446 if (!frchainP->frch_next || frchainP->frch_next->frch_seg != now_seg)
1447 alignment = get_recorded_alignment (now_seg);
1448
799051fc
RH		 1449 if (subseg_text_p (now_seg))
1450 frag_align_code (alignment, 0);
1451 else
1452 frag_align (alignment, 0, 0);
252b5132
RH		 1453
1454 /* frag_align will have left a new frag.
1455 Use this last frag for an empty ".fill".
1456
1457 For this segment ...
1458 Create a last frag. Do not leave a "being filled in frag". */
252b5132
RH		 1459 frag_wane (frag_now);
1460 frag_now->fr_fix = 0;
1461 know (frag_now->fr_next == NULL);
1462 }
1463}
1464
1465/* Write the object file. */
1466
1467void
1468write_object_file ()
1469{
1470#if ! defined (BFD_ASSEMBLER) || ! defined (WORKING_DOT_WORD)
efaf0ba4 1471 fragS *fragP; /* Track along all frags. */
252b5132
RH		 1472#endif
1473
1474 /* Do we really want to write it? */
1475 {
1476 int n_warns, n_errs;
1477 n_warns = had_warnings ();
1478 n_errs = had_errors ();
1479 /* The -Z flag indicates that an object file should be generated,
1480 regardless of warnings and errors. */
1481 if (flag_always_generate_output)
1482 {
1483 if (n_warns || n_errs)
1484 as_warn (_("%d error%s, %d warning%s, generating bad object file.\n"),
1485 n_errs, n_errs == 1 ? "" : "s",
1486 n_warns, n_warns == 1 ? "" : "s");
1487 }
1488 else
1489 {
1490 if (n_errs)
1491 as_fatal (_("%d error%s, %d warning%s, no object file generated.\n"),
1492 n_errs, n_errs == 1 ? "" : "s",
1493 n_warns, n_warns == 1 ? "" : "s");
1494 }
1495 }
1496
1497#ifdef OBJ_VMS
1498 /* Under VMS we try to be compatible with VAX-11 "C". Thus, we call
1499 a routine to check for the definition of the procedure "_main",
efaf0ba4 1500 and if so -- fix it up so that it can be program entry point. */
252b5132 1501 vms_check_for_main ();
efaf0ba4 1502#endif /* OBJ_VMS */
252b5132
RH		 1503
1504 /* From now on, we don't care about sub-segments. Build one frag chain
1505 for each segment. Linked thru fr_next. */
1506
1507#ifdef BFD_ASSEMBLER
1508 /* Remove the sections created by gas for its own purposes. */
1509 {
1510 asection **seclist, *sec;
1511 int i;
1512
1513 seclist = &stdoutput->sections;
1514 while (seclist && *seclist)
1515 {
1516 sec = *seclist;
1517 while (sec == reg_section || sec == expr_section)
1518 {
1519 sec = sec->next;
1520 *seclist = sec;
1521 stdoutput->section_count--;
1522 if (!sec)
1523 break;
1524 }
1525 if (*seclist)
1526 seclist = &(*seclist)->next;
1527 }
1528 i = 0;
1529 bfd_map_over_sections (stdoutput, renumber_sections, &i);
1530 }
1531
1532 bfd_map_over_sections (stdoutput, chain_frchains_together, (char *) 0);
1533#else
1534 remove_subsegs (frchain_root, SEG_TEXT, &text_frag_root, &text_last_frag);
1535 remove_subsegs (data0_frchainP, SEG_DATA, &data_frag_root, &data_last_frag);
1536 remove_subsegs (bss0_frchainP, SEG_BSS, &bss_frag_root, &bss_last_frag);
1537#endif
1538
1539 /* We have two segments. If user gave -R flag, then we must put the
1540 data frags into the text segment. Do this before relaxing so
1541 we know to take advantage of -R and make shorter addresses. */
1542#if !defined (OBJ_AOUT) || defined (BFD_ASSEMBLER)
1543 if (flag_readonly_data_in_text)
1544 {
1545 merge_data_into_text ();
1546 }
1547#endif
1548
1549#ifdef BFD_ASSEMBLER
e46d99eb
AM		 1550 while (1)
1551 {
1552 int changed;
1553
aacb5251
HPN		 1554#ifndef WORKING_DOT_WORD
1555 /* We need to reset the markers in the broken word list and
1556 associated frags between calls to relax_segment (via
1557 relax_seg). Since the broken word list is global, we do it
1558 once per round, rather than locally in relax_segment for each
1559 segment. */
1560 struct broken_word *brokp;
1561
1562 for (brokp = broken_words;
1563 brokp != (struct broken_word *) NULL;
1564 brokp = brokp->next_broken_word)
1565 {
1566 brokp->added = 0;
1567
1568 if (brokp->dispfrag != (fragS *) NULL
1569 && brokp->dispfrag->fr_type == rs_broken_word)
1570 brokp->dispfrag->fr_subtype = 0;
1571 }
1572#endif
1573
e46d99eb
AM		 1574 changed = 0;
1575 bfd_map_over_sections (stdoutput, relax_seg, &changed);
1576 if (!changed)
1577 break;
1578 }
1579 bfd_map_over_sections (stdoutput, size_seg, (char *) 0);
252b5132
RH		 1580#else
1581 relax_and_size_all_segments ();
efaf0ba4 1582#endif /* BFD_ASSEMBLER */
252b5132 1583
e46d99eb
AM		 1584 /* Relaxation has completed. Freeze all syms. */
1585 finalize_syms = 2;
1586
6aa4f516 1587#if defined (BFD_ASSEMBLER) && defined (OBJ_COFF) && defined (TE_GO32)
dbddefbf 1588 /* Now that the segments have their final sizes, run through the
6aa4f516
NC		 1589 sections and set their vma and lma. !BFD gas sets them, and BFD gas
1590 should too. Currently, only DJGPP uses this code, but other
1591 COFF targets may need to execute this too. */
dbddefbf
NC		 1592 bfd_map_over_sections (stdoutput, set_segment_vma, (char *) 0);
1593#endif
1594
252b5132 1595#ifndef BFD_ASSEMBLER
efaf0ba4 1596 /* Crawl the symbol chain.
58a77e41 1597
efaf0ba4
NC		 1598 For each symbol whose value depends on a frag, take the address of
1599 that frag and subsume it into the value of the symbol.
1600 After this, there is just one way to lookup a symbol value.
1601 Values are left in their final state for object file emission.
1602 We adjust the values of 'L' local symbols, even if we do
1603 not intend to emit them to the object file, because their values
1604 are needed for fix-ups.
58a77e41 1605
efaf0ba4
NC		 1606 Unless we saw a -L flag, remove all symbols that begin with 'L'
1607 from the symbol chain. (They are still pointed to by the fixes.)
58a77e41 1608
efaf0ba4
NC		 1609 Count the remaining symbols.
1610 Assign a symbol number to each symbol.
1611 Count the number of string-table chars we will emit.
1612 Put this info into the headers as appropriate. */
252b5132
RH		 1613 know (zero_address_frag.fr_address == 0);
1614 string_byte_count = sizeof (string_byte_count);
1615
1616 obj_crawl_symbol_chain (&headers);
1617
1618 if (string_byte_count == sizeof (string_byte_count))
1619 string_byte_count = 0;
1620
1621 H_SET_STRING_SIZE (&headers, string_byte_count);
1622
efaf0ba4
NC		 1623 /* Addresses of frags now reflect addresses we use in the object file.
1624 Symbol values are correct.
1625 Scan the frags, converting any ".org"s and ".align"s to ".fill"s.
1626 Also converting any machine-dependent frags using md_convert_frag(); */
252b5132
RH		 1627 subseg_change (SEG_TEXT, 0);
1628
1629 for (fragP = text_frag_root; fragP; fragP = fragP->fr_next)
1630 {
1631 /* At this point we have linked all the frags into a single
1632 chain. However, cvt_frag_to_fill may call md_convert_frag
1633 which may call fix_new. We need to ensure that fix_new adds
1634 the fixup to the right section. */
1635 if (fragP == data_frag_root)
1636 subseg_change (SEG_DATA, 0);
1637
1638 cvt_frag_to_fill (&headers, SEG_TEXT, fragP);
1639
1640 /* Some assert macros don't work with # directives mixed in. */
1641#ifndef NDEBUG
1642 if (!(fragP->fr_next == NULL
1643#ifdef OBJ_BOUT
1644 || fragP->fr_next == data_frag_root
1645#endif
1646 || ((fragP->fr_next->fr_address - fragP->fr_address)
1647 == (fragP->fr_fix + fragP->fr_offset * fragP->fr_var))))
1648 abort ();
1649#endif
1650 }
efaf0ba4 1651#endif /* ! BFD_ASSEMBLER */
252b5132
RH		 1652
1653#ifndef WORKING_DOT_WORD
1654 {
1655 struct broken_word *lie;
1656 struct broken_word **prevP;
1657
1658 prevP = &broken_words;
1659 for (lie = broken_words; lie; lie = lie->next_broken_word)
1660 if (!lie->added)
1661 {
1662 expressionS exp;
1663
1664 subseg_change (lie->seg, lie->subseg);
1665 exp.X_op = O_subtract;
1666 exp.X_add_symbol = lie->add;
1667 exp.X_op_symbol = lie->sub;
1668 exp.X_add_number = lie->addnum;
1669#ifdef BFD_ASSEMBLER
1670#ifdef TC_CONS_FIX_NEW
1671 TC_CONS_FIX_NEW (lie->frag,
efaf0ba4
NC		 1672 lie->word_goes_here - lie->frag->fr_literal,
1673 2, &exp);
252b5132
RH		 1674#else
1675 fix_new_exp (lie->frag,
1676 lie->word_goes_here - lie->frag->fr_literal,
1677 2, &exp, 0, BFD_RELOC_16);
1678#endif
1679#else
1680#if defined(TC_SPARC) || defined(TC_A29K) || defined(NEED_FX_R_TYPE)
1681 fix_new_exp (lie->frag,
1682 lie->word_goes_here - lie->frag->fr_literal,
1683 2, &exp, 0, NO_RELOC);
1684#else
1685#ifdef TC_NS32K
1686 fix_new_ns32k_exp (lie->frag,
1687 lie->word_goes_here - lie->frag->fr_literal,
1688 2, &exp, 0, 0, 2, 0, 0);
1689#else
1690 fix_new_exp (lie->frag,
1691 lie->word_goes_here - lie->frag->fr_literal,
1692 2, &exp, 0, 0);
efaf0ba4
NC		 1693#endif /* TC_NS32K */
1694#endif /* TC_SPARC|TC_A29K|NEED_FX_R_TYPE */
1695#endif /* BFD_ASSEMBLER */
252b5132
RH		 1696 *prevP = lie->next_broken_word;
1697 }
1698 else
1699 prevP = &(lie->next_broken_word);
1700
1701 for (lie = broken_words; lie;)
1702 {
1703 struct broken_word *untruth;
1704 char *table_ptr;
1705 addressT table_addr;
1706 addressT from_addr, to_addr;
1707 int n, m;
1708
1709 subseg_change (lie->seg, lie->subseg);
1710 fragP = lie->dispfrag;
1711
1712 /* Find out how many broken_words go here. */
1713 n = 0;
efaf0ba4
NC		 1714 for (untruth = lie;
1715 untruth && untruth->dispfrag == fragP;
1716 untruth = untruth->next_broken_word)
252b5132
RH		 1717 if (untruth->added == 1)
1718 n++;
1719
1720 table_ptr = lie->dispfrag->fr_opcode;
efaf0ba4
NC		 1721 table_addr = (lie->dispfrag->fr_address
1722 + (table_ptr - lie->dispfrag->fr_literal));
252b5132
RH		 1723 /* Create the jump around the long jumps. This is a short
1724 jump from table_ptr+0 to table_ptr+n*long_jump_size. */
1725 from_addr = table_addr;
1726 to_addr = table_addr + md_short_jump_size + n * md_long_jump_size;
efaf0ba4
NC		 1727 md_create_short_jump (table_ptr, from_addr, to_addr, lie->dispfrag,
1728 lie->add);
252b5132
RH		 1729 table_ptr += md_short_jump_size;
1730 table_addr += md_short_jump_size;
1731
efaf0ba4
NC		 1732 for (m = 0;
1733 lie && lie->dispfrag == fragP;
1734 m++, lie = lie->next_broken_word)
252b5132
RH		 1735 {
1736 if (lie->added == 2)
1737 continue;
efaf0ba4
NC		 1738 /* Patch the jump table. */
1739 /* This is the offset from ??? to table_ptr+0. */
252b5132
RH		 1740 to_addr = table_addr - S_GET_VALUE (lie->sub);
1741#ifdef BFD_ASSEMBLER
49309057 1742 to_addr -= symbol_get_frag (lie->sub)->fr_address;
753f6b12
HPN		 1743#endif
1744#ifdef TC_CHECK_ADJUSTED_BROKEN_DOT_WORD
1745 TC_CHECK_ADJUSTED_BROKEN_DOT_WORD (to_addr, lie);
252b5132
RH		 1746#endif
1747 md_number_to_chars (lie->word_goes_here, to_addr, 2);
efaf0ba4
NC		 1748 for (untruth = lie->next_broken_word;
1749 untruth && untruth->dispfrag == fragP;
1750 untruth = untruth->next_broken_word)
252b5132
RH		 1751 {
1752 if (untruth->use_jump == lie)
1753 md_number_to_chars (untruth->word_goes_here, to_addr, 2);
1754 }
1755
efaf0ba4
NC		 1756 /* Install the long jump. */
1757 /* This is a long jump from table_ptr+0 to the final target. */
252b5132
RH		 1758 from_addr = table_addr;
1759 to_addr = S_GET_VALUE (lie->add) + lie->addnum;
1760#ifdef BFD_ASSEMBLER
49309057 1761 to_addr += symbol_get_frag (lie->add)->fr_address;
252b5132 1762#endif
efaf0ba4
NC		 1763 md_create_long_jump (table_ptr, from_addr, to_addr, lie->dispfrag,
1764 lie->add);
252b5132
RH		 1765 table_ptr += md_long_jump_size;
1766 table_addr += md_long_jump_size;
1767 }
1768 }
1769 }
efaf0ba4 1770#endif /* not WORKING_DOT_WORD */
252b5132
RH		 1771
1772#ifndef BFD_ASSEMBLER
1773#ifndef OBJ_VMS
efaf0ba4 1774 { /* not vms */
252b5132
RH		 1775 char *the_object_file;
1776 long object_file_size;
efaf0ba4
NC		 1777 /* Scan every FixS performing fixups. We had to wait until now to
1778 do this because md_convert_frag() may have made some fixSs. */
252b5132
RH		 1779 int trsize, drsize;
1780
1781 subseg_change (SEG_TEXT, 0);
1782 trsize = md_reloc_size * fixup_segment (text_fix_root, SEG_TEXT);
1783 subseg_change (SEG_DATA, 0);
1784 drsize = md_reloc_size * fixup_segment (data_fix_root, SEG_DATA);
1785 H_SET_RELOCATION_SIZE (&headers, trsize, drsize);
1786
efaf0ba4 1787 /* FIXME: Move this stuff into the pre-write-hook. */
252b5132
RH		 1788 H_SET_MAGIC_NUMBER (&headers, magic_number_for_object_file);
1789 H_SET_ENTRY_POINT (&headers, 0);
1790
efaf0ba4 1791 obj_pre_write_hook (&headers); /* Extra coff stuff. */
252b5132
RH		 1792
1793 object_file_size = H_GET_FILE_SIZE (&headers);
1794 next_object_file_charP = the_object_file = xmalloc (object_file_size);
1795
1796 output_file_create (out_file_name);
1797
1798 obj_header_append (&next_object_file_charP, &headers);
1799
efaf0ba4
NC		 1800 know ((next_object_file_charP - the_object_file)
1801 == H_GET_HEADER_SIZE (&headers));
252b5132 1802
efaf0ba4 1803 /* Emit code. */
252b5132
RH		 1804 for (fragP = text_frag_root; fragP; fragP = fragP->fr_next)
1805 {
1806 register long count;
1807 register char *fill_literal;
1808 register long fill_size;
1809
1810 PROGRESS (1);
1811 know (fragP->fr_type == rs_fill);
efaf0ba4
NC		 1812 append (&next_object_file_charP, fragP->fr_literal,
1813 (unsigned long) fragP->fr_fix);
252b5132
RH		 1814 fill_literal = fragP->fr_literal + fragP->fr_fix;
1815 fill_size = fragP->fr_var;
1816 know (fragP->fr_offset >= 0);
1817
1818 for (count = fragP->fr_offset; count; count--)
efaf0ba4
NC		 1819 append (&next_object_file_charP, fill_literal,
1820 (unsigned long) fill_size);
1821 }
252b5132 1822
efaf0ba4
NC		 1823 know ((next_object_file_charP - the_object_file)
1824 == (H_GET_HEADER_SIZE (&headers)
1825 + H_GET_TEXT_SIZE (&headers)
1826 + H_GET_DATA_SIZE (&headers)));
1827
1828 /* Emit relocations. */
1829 obj_emit_relocations (&next_object_file_charP, text_fix_root,
1830 (relax_addressT) 0);
1831 know ((next_object_file_charP - the_object_file)
1832 == (H_GET_HEADER_SIZE (&headers)
1833 + H_GET_TEXT_SIZE (&headers)
1834 + H_GET_DATA_SIZE (&headers)
1835 + H_GET_TEXT_RELOCATION_SIZE (&headers)));
252b5132
RH		 1836#ifdef TC_I960
1837 /* Make addresses in data relocation directives relative to beginning of
efaf0ba4
NC		 1838 first data fragment, not end of last text fragment: alignment of the
1839 start of the data segment may place a gap between the segments. */
1840 obj_emit_relocations (&next_object_file_charP, data_fix_root,
1841 data0_frchainP->frch_root->fr_address);
1842#else /* TC_I960 */
1843 obj_emit_relocations (&next_object_file_charP, data_fix_root,
1844 text_last_frag->fr_address);
1845#endif /* TC_I960 */
1846
1847 know ((next_object_file_charP - the_object_file)
1848 == (H_GET_HEADER_SIZE (&headers)
1849 + H_GET_TEXT_SIZE (&headers)
1850 + H_GET_DATA_SIZE (&headers)
1851 + H_GET_TEXT_RELOCATION_SIZE (&headers)
1852 + H_GET_DATA_RELOCATION_SIZE (&headers)));
1853
1854 /* Emit line number entries. */
252b5132 1855 OBJ_EMIT_LINENO (&next_object_file_charP, lineno_rootP, the_object_file);
efaf0ba4
NC		 1856 know ((next_object_file_charP - the_object_file)
1857 == (H_GET_HEADER_SIZE (&headers)
1858 + H_GET_TEXT_SIZE (&headers)
1859 + H_GET_DATA_SIZE (&headers)
1860 + H_GET_TEXT_RELOCATION_SIZE (&headers)
1861 + H_GET_DATA_RELOCATION_SIZE (&headers)
1862 + H_GET_LINENO_SIZE (&headers)));
1863
1864 /* Emit symbols. */
252b5132 1865 obj_emit_symbols (&next_object_file_charP, symbol_rootP);
efaf0ba4
NC		 1866 know ((next_object_file_charP - the_object_file)
1867 == (H_GET_HEADER_SIZE (&headers)
1868 + H_GET_TEXT_SIZE (&headers)
1869 + H_GET_DATA_SIZE (&headers)
1870 + H_GET_TEXT_RELOCATION_SIZE (&headers)
1871 + H_GET_DATA_RELOCATION_SIZE (&headers)
1872 + H_GET_LINENO_SIZE (&headers)
1873 + H_GET_SYMBOL_TABLE_SIZE (&headers)));
1874
1875 /* Emit strings. */
252b5132 1876 if (string_byte_count > 0)
efaf0ba4 1877 obj_emit_strings (&next_object_file_charP);
252b5132
RH		 1878
1879#ifdef BFD_HEADERS
1880 bfd_seek (stdoutput, 0, 0);
1881 bfd_write (the_object_file, 1, object_file_size, stdoutput);
1882#else
1883
efaf0ba4 1884 /* Write the data to the file. */
252b5132
RH		 1885 output_file_append (the_object_file, object_file_size, out_file_name);
1886 free (the_object_file);
1887#endif
efaf0ba4
NC		 1888 }
1889#else /* OBJ_VMS */
1890 /* Now do the VMS-dependent part of writing the object file. */
252b5132
RH		 1891 vms_write_object_file (H_GET_TEXT_SIZE (&headers),
1892 H_GET_DATA_SIZE (&headers),
1893 H_GET_BSS_SIZE (&headers),
1894 text_frag_root, data_frag_root);
efaf0ba4
NC		 1895#endif /* OBJ_VMS */
1896#else /* BFD_ASSEMBLER */
252b5132
RH		 1897
1898 /* Resolve symbol values. This needs to be done before processing
1899 the relocations. */
1900 if (symbol_rootP)
1901 {
1902 symbolS *symp;
1903
1904 for (symp = symbol_rootP; symp; symp = symbol_next (symp))
e46d99eb 1905 resolve_symbol_value (symp, finalize_syms);
252b5132 1906 }
49309057 1907 resolve_local_symbol_values ();
252b5132
RH		 1908
1909 PROGRESS (1);
1910
1911#ifdef tc_frob_file_before_adjust
1912 tc_frob_file_before_adjust ();
1913#endif
1914#ifdef obj_frob_file_before_adjust
1915 obj_frob_file_before_adjust ();
1916#endif
1917
efaf0ba4 1918 bfd_map_over_sections (stdoutput, adjust_reloc_syms, (char *) 0);
252b5132
RH		 1919
1920 /* Set up symbol table, and write it out. */
1921 if (symbol_rootP)
1922 {
1923 symbolS *symp;
1924
1925 for (symp = symbol_rootP; symp; symp = symbol_next (symp))
1926 {
1927 int punt = 0;
1928 const char *name;
1929
49309057 1930 if (symbol_mri_common_p (symp))
252b5132
RH		 1931 {
1932 if (S_IS_EXTERNAL (symp))
1933 as_bad (_("%s: global symbols not supported in common sections"),
1934 S_GET_NAME (symp));
1935 symbol_remove (symp, &symbol_rootP, &symbol_lastP);
1936 continue;
1937 }
1938
1939 name = S_GET_NAME (symp);
1940 if (name)
1941 {
efaf0ba4
NC		 1942 const char *name2 =
1943 decode_local_label_name ((char *) S_GET_NAME (symp));
252b5132
RH		 1944 /* They only differ if `name' is a fb or dollar local
1945 label name. */
1946 if (name2 != name && ! S_IS_DEFINED (symp))
1947 as_bad (_("local label %s is not defined"), name2);
1948 }
1949
1950 /* Do it again, because adjust_reloc_syms might introduce
1951 more symbols. They'll probably only be section symbols,
1952 but they'll still need to have the values computed. */
e46d99eb 1953 resolve_symbol_value (symp, finalize_syms);
252b5132
RH		 1954
1955 /* Skip symbols which were equated to undefined or common
1956 symbols. */
49309057 1957 if (symbol_equated_p (symp)
252b5132
RH		 1958 && (! S_IS_DEFINED (symp) || S_IS_COMMON (symp)))
1959 {
1960 symbol_remove (symp, &symbol_rootP, &symbol_lastP);
1961 continue;
1962 }
1963
1964 /* So far, common symbols have been treated like undefined symbols.
1965 Put them in the common section now. */
1966 if (S_IS_DEFINED (symp) == 0
1967 && S_GET_VALUE (symp) != 0)
1968 S_SET_SEGMENT (symp, bfd_com_section_ptr);
1969#if 0
1970 printf ("symbol `%s'\n\t@%x: value=%d flags=%x seg=%s\n",
1971 S_GET_NAME (symp), symp,
1972 S_GET_VALUE (symp),
49309057
ILT		 1973 symbol_get_bfdsym (symp)->flags,
1974 segment_name (S_GET_SEGMENT (symp)));
252b5132
RH		 1975#endif
1976
1977#ifdef obj_frob_symbol
1978 obj_frob_symbol (symp, punt);
1979#endif
1980#ifdef tc_frob_symbol
49309057 1981 if (! punt || symbol_used_in_reloc_p (symp))
252b5132
RH		 1982 tc_frob_symbol (symp, punt);
1983#endif
1984
1985 /* If we don't want to keep this symbol, splice it out of
1986 the chain now. If EMIT_SECTION_SYMBOLS is 0, we never
1987 want section symbols. Otherwise, we skip local symbols
1988 and symbols that the frob_symbol macros told us to punt,
1989 but we keep such symbols if they are used in relocs. */
1990 if ((! EMIT_SECTION_SYMBOLS
49309057 1991 && symbol_section_p (symp))
252b5132
RH		 1992 /* Note that S_IS_EXTERN and S_IS_LOCAL are not always
1993 opposites. Sometimes the former checks flags and the
1994 latter examines the name... */
1995 || (!S_IS_EXTERN (symp)
1996 && (S_IS_LOCAL (symp) || punt)
49309057 1997 && ! symbol_used_in_reloc_p (symp)))
252b5132
RH		 1998 {
1999 symbol_remove (symp, &symbol_rootP, &symbol_lastP);
efaf0ba4 2000
252b5132
RH		 2001 /* After symbol_remove, symbol_next(symp) still returns
2002 the one that came after it in the chain. So we don't
2003 need to do any extra cleanup work here. */
252b5132
RH		 2004 continue;
2005 }
2006
2007 /* Make sure we really got a value for the symbol. */
49309057 2008 if (! symbol_resolved_p (symp))
252b5132
RH		 2009 {
2010 as_bad (_("can't resolve value for symbol \"%s\""),
2011 S_GET_NAME (symp));
49309057 2012 symbol_mark_resolved (symp);
252b5132
RH		 2013 }
2014
2015 /* Set the value into the BFD symbol. Up til now the value
2016 has only been kept in the gas symbolS struct. */
49309057 2017 symbol_get_bfdsym (symp)->value = S_GET_VALUE (symp);
252b5132
RH		 2018 }
2019 }
2020
2021 PROGRESS (1);
2022
2023 /* Now do any format-specific adjustments to the symbol table, such
2024 as adding file symbols. */
2025#ifdef tc_adjust_symtab
2026 tc_adjust_symtab ();
2027#endif
2028#ifdef obj_adjust_symtab
2029 obj_adjust_symtab ();
2030#endif
2031
2032 /* Now that all the sizes are known, and contents correct, we can
2033 start writing to the file. */
2034 set_symtab ();
2035
2036 /* If *_frob_file changes the symbol value at this point, it is
2037 responsible for moving the changed value into symp->bsym->value
2038 as well. Hopefully all symbol value changing can be done in
2039 *_frob_symbol. */
2040#ifdef tc_frob_file
2041 tc_frob_file ();
2042#endif
2043#ifdef obj_frob_file
2044 obj_frob_file ();
2045#endif
2046
2047 bfd_map_over_sections (stdoutput, write_relocs, (char *) 0);
2048
2049#ifdef tc_frob_file_after_relocs
2050 tc_frob_file_after_relocs ();
2051#endif
2052#ifdef obj_frob_file_after_relocs
2053 obj_frob_file_after_relocs ();
2054#endif
2055
2056 bfd_map_over_sections (stdoutput, write_contents, (char *) 0);
efaf0ba4 2057#endif /* BFD_ASSEMBLER */
252b5132 2058}
efaf0ba4 2059#endif /* ! BFD */
252b5132
RH		 2060
2061#ifdef TC_GENERIC_RELAX_TABLE
2062
252b5132
RH		 2063/* Relax a fragment by scanning TC_GENERIC_RELAX_TABLE. */
2064
2065long
c842b53a
ILT		 2066relax_frag (segment, fragP, stretch)
2067 segT segment;
252b5132
RH		 2068 fragS *fragP;
2069 long stretch;
2070{
2071 const relax_typeS *this_type;
2072 const relax_typeS *start_type;
2073 relax_substateT next_state;
2074 relax_substateT this_state;
38686296
AM		 2075 long growth;
2076 offsetT aim;
2077 addressT target;
2078 addressT address;
2079 symbolS *symbolP;
2080 const relax_typeS *table;
2081
2082 target = fragP->fr_offset;
2083 address = fragP->fr_address;
2084 table = TC_GENERIC_RELAX_TABLE;
252b5132
RH		 2085 this_state = fragP->fr_subtype;
2086 start_type = this_type = table + this_state;
38686296 2087 symbolP = fragP->fr_symbol;
252b5132
RH		 2088
2089 if (symbolP)
2090 {
c842b53a
ILT		 2091 fragS *sym_frag;
2092
2093 sym_frag = symbol_get_frag (symbolP);
2094
252b5132
RH		 2095#ifndef DIFF_EXPR_OK
2096#if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER)
2097 know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE)
2098 || (S_GET_SEGMENT (symbolP) == SEG_DATA)
2099 || (S_GET_SEGMENT (symbolP) == SEG_BSS)
2100 || (S_GET_SEGMENT (symbolP) == SEG_TEXT));
2101#endif
c842b53a 2102 know (sym_frag != NULL);
252b5132
RH		 2103#endif
2104 know (!(S_GET_SEGMENT (symbolP) == absolute_section)
c842b53a
ILT		 2105 || sym_frag == &zero_address_frag);
2106 target += S_GET_VALUE (symbolP) + sym_frag->fr_address;
252b5132
RH		 2107
2108 /* If frag has yet to be reached on this pass,
2109 assume it will move by STRETCH just as we did.
2110 If this is not so, it will be because some frag
38686296 2111 between grows, and that will force another pass. */
252b5132 2112
c842b53a 2113 if (stretch != 0
38686296
AM		 2114 && sym_frag->relax_marker != fragP->relax_marker
2115 && S_GET_SEGMENT (symbolP) == segment)
252b5132
RH		 2116 {
2117 target += stretch;
2118 }
2119 }
2120
2121 aim = target - address - fragP->fr_fix;
2122#ifdef TC_PCREL_ADJUST
efaf0ba4
NC		 2123 /* Currently only the ns32k family needs this. */
2124 aim += TC_PCREL_ADJUST (fragP);
2125/* #else */
252b5132
RH		 2126 /* This machine doesn't want to use pcrel_adjust.
2127 In that case, pcrel_adjust should be zero. */
efaf0ba4
NC		 2128#if 0
2129 assert (fragP->fr_targ.ns32k.pcrel_adjust == 0);
252b5132 2130#endif
efaf0ba4
NC		 2131#endif
2132#ifdef md_prepare_relax_scan /* formerly called M68K_AIM_KLUDGE */
252b5132
RH		 2133 md_prepare_relax_scan (fragP, address, aim, this_state, this_type);
2134#endif
2135
2136 if (aim < 0)
2137 {
efaf0ba4 2138 /* Look backwards. */
252b5132
RH		 2139 for (next_state = this_type->rlx_more; next_state;)
2140 if (aim >= this_type->rlx_backward)
2141 next_state = 0;
2142 else
2143 {
efaf0ba4 2144 /* Grow to next state. */
252b5132
RH		 2145 this_state = next_state;
2146 this_type = table + this_state;
2147 next_state = this_type->rlx_more;
2148 }
2149 }
2150 else
2151 {
efaf0ba4 2152 /* Look forwards. */
252b5132
RH		 2153 for (next_state = this_type->rlx_more; next_state;)
2154 if (aim <= this_type->rlx_forward)
2155 next_state = 0;
2156 else
2157 {
efaf0ba4 2158 /* Grow to next state. */
252b5132
RH		 2159 this_state = next_state;
2160 this_type = table + this_state;
2161 next_state = this_type->rlx_more;
2162 }
2163 }
2164
2165 growth = this_type->rlx_length - start_type->rlx_length;
2166 if (growth != 0)
2167 fragP->fr_subtype = this_state;
2168 return growth;
2169}
2170
efaf0ba4 2171#endif /* defined (TC_GENERIC_RELAX_TABLE) */
252b5132
RH		 2172
2173/* Relax_align. Advance location counter to next address that has 'alignment'
2174 lowest order bits all 0s, return size of adjustment made. */
2175static relax_addressT
2176relax_align (address, alignment)
efaf0ba4
NC		 2177 register relax_addressT address; /* Address now. */
2178 register int alignment; /* Alignment (binary). */
252b5132
RH		 2179{
2180 relax_addressT mask;
2181 relax_addressT new_address;
2182
2183 mask = ~((~0) << alignment);
2184 new_address = (address + mask) & (~mask);
2185#ifdef LINKER_RELAXING_SHRINKS_ONLY
2186 if (linkrelax)
2187 /* We must provide lots of padding, so the linker can discard it
2188 when needed. The linker will not add extra space, ever. */
2189 new_address += (1 << alignment);
2190#endif
2191 return (new_address - address);
2192}
2193
efaf0ba4
NC		 2194/* Now we have a segment, not a crowd of sub-segments, we can make
2195 fr_address values.
58a77e41 2196
efaf0ba4 2197 Relax the frags.
58a77e41 2198
efaf0ba4
NC		 2199 After this, all frags in this segment have addresses that are correct
2200 within the segment. Since segments live in different file addresses,
2201 these frag addresses may not be the same as final object-file
2202 addresses. */
2203
e46d99eb 2204int
252b5132
RH		 2205relax_segment (segment_frag_root, segment)
2206 struct frag *segment_frag_root;
2207 segT segment;
2208{
2209 register struct frag *fragP;
2210 register relax_addressT address;
e46d99eb
AM		 2211 int ret;
2212
252b5132
RH		 2213#if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER)
2214 know (segment == SEG_DATA || segment == SEG_TEXT || segment == SEG_BSS);
2215#endif
efaf0ba4 2216 /* In case md_estimate_size_before_relax() wants to make fixSs. */
252b5132
RH		 2217 subseg_change (segment, 0);
2218
2219 /* For each frag in segment: count and store (a 1st guess of)
2220 fr_address. */
2221 address = 0;
2222 for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next)
2223 {
38686296 2224 fragP->relax_marker = 0;
252b5132
RH		 2225 fragP->fr_address = address;
2226 address += fragP->fr_fix;
2227
2228 switch (fragP->fr_type)
2229 {
2230 case rs_fill:
2231 address += fragP->fr_offset * fragP->fr_var;
2232 break;
2233
2234 case rs_align:
2235 case rs_align_code:
0a9ef439 2236 case rs_align_test:
252b5132
RH		 2237 {
2238 addressT offset = relax_align (address, (int) fragP->fr_offset);
2239
2240 if (fragP->fr_subtype != 0 && offset > fragP->fr_subtype)
2241 offset = 0;
2242
2243 if (offset % fragP->fr_var != 0)
2244 {
2245 as_bad (_("alignment padding (%lu bytes) not a multiple of %ld"),
2246 (unsigned long) offset, (long) fragP->fr_var);
2247 offset -= (offset % fragP->fr_var);
2248 }
2249
2250 address += offset;
2251 }
2252 break;
2253
2254 case rs_org:
2255 case rs_space:
2256 /* Assume .org is nugatory. It will grow with 1st relax. */
2257 break;
2258
2259 case rs_machine_dependent:
2260 address += md_estimate_size_before_relax (fragP, segment);
2261 break;
2262
2263#ifndef WORKING_DOT_WORD
efaf0ba4 2264 /* Broken words don't concern us yet. */
252b5132
RH		 2265 case rs_broken_word:
2266 break;
2267#endif
2268
2269 case rs_leb128:
efaf0ba4 2270 /* Initial guess is always 1; doing otherwise can result in
252b5132
RH		 2271 stable solutions that are larger than the minimum. */
2272 address += fragP->fr_offset = 1;
2273 break;
2274
2275 case rs_cfa:
2276 address += eh_frame_estimate_size_before_relax (fragP);
2277 break;
2278
220e750f
RH		 2279 case rs_dwarf2dbg:
2280 address += dwarf2dbg_estimate_size_before_relax (fragP);
2281 break;
2282
252b5132
RH		 2283 default:
2284 BAD_CASE (fragP->fr_type);
2285 break;
efaf0ba4
NC		 2286 }
2287 }
252b5132
RH		 2288
2289 /* Do relax(). */
2290 {
efaf0ba4
NC		 2291 long stretch; /* May be any size, 0 or negative. */
2292 /* Cumulative number of addresses we have relaxed this pass.
2293 We may have relaxed more than one address. */
e46d99eb 2294 int stretched; /* Have we stretched on this pass? */
252b5132
RH		 2295 /* This is 'cuz stretch may be zero, when, in fact some piece of code
2296 grew, and another shrank. If a branch instruction doesn't fit anymore,
2297 we could be scrod. */
2298
2299 do
2300 {
e46d99eb
AM		 2301 stretch = 0;
2302 stretched = 0;
58a77e41 2303
252b5132
RH		 2304 for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next)
2305 {
2306 long growth = 0;
2307 addressT was_address;
2308 offsetT offset;
2309 symbolS *symbolP;
2310
38686296 2311 fragP->relax_marker ^= 1;
252b5132
RH		 2312 was_address = fragP->fr_address;
2313 address = fragP->fr_address += stretch;
2314 symbolP = fragP->fr_symbol;
2315 offset = fragP->fr_offset;
2316
2317 switch (fragP->fr_type)
2318 {
efaf0ba4 2319 case rs_fill: /* .fill never relaxes. */
252b5132
RH		 2320 growth = 0;
2321 break;
2322
2323#ifndef WORKING_DOT_WORD
2324 /* JF: This is RMS's idea. I do *NOT* want to be blamed
2325 for it I do not want to write it. I do not want to have
2326 anything to do with it. This is not the proper way to
2327 implement this misfeature. */
2328 case rs_broken_word:
2329 {
2330 struct broken_word *lie;
2331 struct broken_word *untruth;
2332
2333 /* Yes this is ugly (storing the broken_word pointer
2334 in the symbol slot). Still, this whole chunk of
2335 code is ugly, and I don't feel like doing anything
2336 about it. Think of it as stubbornness in action. */
2337 growth = 0;
2338 for (lie = (struct broken_word *) (fragP->fr_symbol);
2339 lie && lie->dispfrag == fragP;
2340 lie = lie->next_broken_word)
2341 {
2342
2343 if (lie->added)
2344 continue;
2345
49309057 2346 offset = (symbol_get_frag (lie->add)->fr_address
252b5132
RH		 2347 + S_GET_VALUE (lie->add)
2348 + lie->addnum
49309057 2349 - (symbol_get_frag (lie->sub)->fr_address
252b5132
RH		 2350 + S_GET_VALUE (lie->sub)));
2351 if (offset <= -32768 || offset >= 32767)
2352 {
2353 if (flag_warn_displacement)
2354 {
2355 char buf[50];
2356 sprint_value (buf, (addressT) lie->addnum);
2357 as_warn (_(".word %s-%s+%s didn't fit"),
2358 S_GET_NAME (lie->add),
2359 S_GET_NAME (lie->sub),
2360 buf);
2361 }
2362 lie->added = 1;
2363 if (fragP->fr_subtype == 0)
2364 {
2365 fragP->fr_subtype++;
2366 growth += md_short_jump_size;
2367 }
2368 for (untruth = lie->next_broken_word;
2369 untruth && untruth->dispfrag == lie->dispfrag;
2370 untruth = untruth->next_broken_word)
49309057
ILT		 2371 if ((symbol_get_frag (untruth->add)
2372 == symbol_get_frag (lie->add))
2373 && (S_GET_VALUE (untruth->add)
2374 == S_GET_VALUE (lie->add)))
252b5132
RH		 2375 {
2376 untruth->added = 2;
2377 untruth->use_jump = lie;
2378 }
2379 growth += md_long_jump_size;
2380 }
2381 }
2382
2383 break;
efaf0ba4 2384 } /* case rs_broken_word */
252b5132
RH		 2385#endif
2386 case rs_align:
2387 case rs_align_code:
0a9ef439 2388 case rs_align_test:
252b5132
RH		 2389 {
2390 addressT oldoff, newoff;
2391
2392 oldoff = relax_align (was_address + fragP->fr_fix,
2393 (int) offset);
2394 newoff = relax_align (address + fragP->fr_fix,
2395 (int) offset);
2396
2397 if (fragP->fr_subtype != 0)
2398 {
2399 if (oldoff > fragP->fr_subtype)
2400 oldoff = 0;
2401 if (newoff > fragP->fr_subtype)
2402 newoff = 0;
2403 }
2404
2405 growth = newoff - oldoff;
2406 }
2407 break;
2408
2409 case rs_org:
2410 {
e46d99eb
AM		 2411 addressT target = offset;
2412 addressT after;
252b5132
RH		 2413
2414 if (symbolP)
2415 {
2416#if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER)
2417 know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE)
2418 || (S_GET_SEGMENT (symbolP) == SEG_DATA)
2419 || (S_GET_SEGMENT (symbolP) == SEG_TEXT)
2420 || S_GET_SEGMENT (symbolP) == SEG_BSS);
2421 know (symbolP->sy_frag);
2422 know (!(S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE)
2423 || (symbolP->sy_frag == &zero_address_frag));
2424#endif
49309057
ILT		 2425 target += (S_GET_VALUE (symbolP)
2426 + symbol_get_frag (symbolP)->fr_address);
efaf0ba4 2427 } /* if we have a symbol */
252b5132
RH		 2428
2429 know (fragP->fr_next);
2430 after = fragP->fr_next->fr_address;
2431 growth = target - after;
2432 if (growth < 0)
2433 {
2434 /* Growth may be negative, but variable part of frag
2435 cannot have fewer than 0 chars. That is, we can't
efaf0ba4 2436 .org backwards. */
14ad458a
ILT		 2437 as_bad_where (fragP->fr_file, fragP->fr_line,
2438 _("attempt to .org backwards ignored"));
2439
2440 /* We've issued an error message. Change the
2441 frag to avoid cascading errors. */
2442 fragP->fr_type = rs_align;
2443 fragP->fr_subtype = 0;
2444 fragP->fr_offset = 0;
2445 fragP->fr_fix = after - address;
2446 growth = stretch;
252b5132
RH		 2447 }
2448
efaf0ba4
NC		 2449 /* This is an absolute growth factor */
2450 growth -= stretch;
252b5132
RH		 2451 break;
2452 }
2453
2454 case rs_space:
2455 if (symbolP)
2456 {
2457 growth = S_GET_VALUE (symbolP);
49309057 2458 if (symbol_get_frag (symbolP) != &zero_address_frag
252b5132
RH		 2459 || S_IS_COMMON (symbolP)
2460 || ! S_IS_DEFINED (symbolP))
2461 as_bad_where (fragP->fr_file, fragP->fr_line,
2462 _(".space specifies non-absolute value"));
2463 fragP->fr_symbol = 0;
2464 if (growth < 0)
2465 {
2466 as_warn (_(".space or .fill with negative value, ignored"));
2467 growth = 0;
2468 }
2469 }
2470 else
2471 growth = 0;
2472 break;
2473
2474 case rs_machine_dependent:
2475#ifdef md_relax_frag
c842b53a 2476 growth = md_relax_frag (segment, fragP, stretch);
252b5132
RH		 2477#else
2478#ifdef TC_GENERIC_RELAX_TABLE
2479 /* The default way to relax a frag is to look through
2480 TC_GENERIC_RELAX_TABLE. */
c842b53a 2481 growth = relax_frag (segment, fragP, stretch);
efaf0ba4 2482#endif /* TC_GENERIC_RELAX_TABLE */
252b5132
RH		 2483#endif
2484 break;
2485
2486 case rs_leb128:
2487 {
2488 valueT value;
2489 int size;
2490
2491 value = resolve_symbol_value (fragP->fr_symbol, 0);
2492 size = sizeof_leb128 (value, fragP->fr_subtype);
2493 growth = size - fragP->fr_offset;
2494 fragP->fr_offset = size;
2495 }
2496 break;
2497
2498 case rs_cfa:
2499 growth = eh_frame_relax_frag (fragP);
2500 break;
2501
220e750f
RH		 2502 case rs_dwarf2dbg:
2503 growth = dwarf2dbg_relax_frag (fragP);
2504 break;
2505
252b5132
RH		 2506 default:
2507 BAD_CASE (fragP->fr_type);
2508 break;
2509 }
2510 if (growth)
2511 {
2512 stretch += growth;
e46d99eb 2513 stretched = 1;
252b5132 2514 }
efaf0ba4 2515 } /* For each frag in the segment. */
252b5132 2516 }
efaf0ba4
NC		 2517 while (stretched); /* Until nothing further to relax. */
2518 } /* do_relax */
252b5132 2519
e46d99eb
AM		 2520 ret = 0;
2521 for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next)
2522 if (fragP->last_fr_address != fragP->fr_address)
2523 {
2524 fragP->last_fr_address = fragP->fr_address;
2525 ret = 1;
2526 }
2527 return ret;
efaf0ba4 2528}
252b5132
RH		 2529
2530#if defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS))
2531
2532#ifndef TC_RELOC_RTSYM_LOC_FIXUP
2533#define TC_RELOC_RTSYM_LOC_FIXUP(X) (1)
2534#endif
2535
2536/* fixup_segment()
2537
2538 Go through all the fixS's in a segment and see which ones can be
2539 handled now. (These consist of fixS where we have since discovered
2540 the value of a symbol, or the address of the frag involved.)
2541 For each one, call md_apply_fix to put the fix into the frag data.
2542
2543 Result is a count of how many relocation structs will be needed to
2544 handle the remaining fixS's that we couldn't completely handle here.
2545 These will be output later by emit_relocations(). */
2546
2547static long
2548fixup_segment (fixP, this_segment_type)
2549 register fixS *fixP;
efaf0ba4 2550 segT this_segment_type; /* N_TYPE bits for segment. */
252b5132
RH		 2551{
2552 long seg_reloc_count = 0;
2553 symbolS *add_symbolP;
2554 symbolS *sub_symbolP;
2555 valueT add_number;
2556 int size;
2557 char *place;
2558 long where;
2559 int pcrel, plt;
2560 fragS *fragP;
2561 segT add_symbol_segment = absolute_section;
2562
2563 /* If the linker is doing the relaxing, we must not do any fixups.
2564
2565 Well, strictly speaking that's not true -- we could do any that are
2566 PC-relative and don't cross regions that could change size. And for the
2567 i960 (the only machine for which we've got a relaxing linker right now),
2568 we might be able to turn callx/callj into bal anyways in cases where we
2569 know the maximum displacement. */
58a77e41 2570 if (linkrelax && TC_LINKRELAX_FIXUP (this_segment_type))
252b5132
RH		 2571 {
2572 for (; fixP; fixP = fixP->fx_next)
2573 seg_reloc_count++;
2574 TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count);
2575 return seg_reloc_count;
2576 }
2577
2578 for (; fixP; fixP = fixP->fx_next)
2579 {
252b5132
RH		 2580#ifdef DEBUG5
2581 fprintf (stderr, "\nprocessing fixup:\n");
2582 print_fixup (fixP);
2583#endif
2584
252b5132
RH		 2585 fragP = fixP->fx_frag;
2586 know (fragP);
2587 where = fixP->fx_where;
2588 place = fragP->fr_literal + where;
2589 size = fixP->fx_size;
2590 add_symbolP = fixP->fx_addsy;
2591#ifdef TC_VALIDATE_FIX
2592 TC_VALIDATE_FIX (fixP, this_segment_type, skip);
2593#endif
2594 sub_symbolP = fixP->fx_subsy;
2595 add_number = fixP->fx_offset;
2596 pcrel = fixP->fx_pcrel;
2597 plt = fixP->fx_plt;
2598
2599 if (add_symbolP != NULL
49309057 2600 && symbol_mri_common_p (add_symbolP))
252b5132
RH		 2601 {
2602 know (add_symbolP->sy_value.X_op == O_symbol);
2603 add_number += S_GET_VALUE (add_symbolP);
2604 fixP->fx_offset = add_number;
49309057
ILT		 2605 add_symbolP = fixP->fx_addsy =
2606 symbol_get_value_expression (add_symbolP)->X_add_symbol;
252b5132
RH		 2607 }
2608
2609 if (add_symbolP)
2610 add_symbol_segment = S_GET_SEGMENT (add_symbolP);
2611
2612 if (sub_symbolP)
2613 {
e46d99eb 2614 resolve_symbol_value (sub_symbolP, finalize_syms);
252b5132
RH		 2615 if (add_symbolP == NULL || add_symbol_segment == absolute_section)
2616 {
2617 if (add_symbolP != NULL)
2618 {
2619 add_number += S_GET_VALUE (add_symbolP);
2620 add_symbolP = NULL;
2621 fixP->fx_addsy = NULL;
2622 }
2623
efaf0ba4 2624 /* It's just -sym. */
252b5132
RH		 2625 if (S_GET_SEGMENT (sub_symbolP) == absolute_section)
2626 {
2627 add_number -= S_GET_VALUE (sub_symbolP);
2628 fixP->fx_subsy = NULL;
2629 }
2630 else if (pcrel
2631 && S_GET_SEGMENT (sub_symbolP) == this_segment_type)
2632 {
2633 /* Should try converting to a constant. */
2634 goto bad_sub_reloc;
2635 }
2636 else
2637 bad_sub_reloc:
2638 as_bad_where (fixP->fx_file, fixP->fx_line,
2639 _("Negative of non-absolute symbol %s"),
2640 S_GET_NAME (sub_symbolP));
2641 }
2642 else if (S_GET_SEGMENT (sub_symbolP) == add_symbol_segment
2643 && SEG_NORMAL (add_symbol_segment))
2644 {
2645 /* Difference of 2 symbols from same segment.
2646 Can't make difference of 2 undefineds: 'value' means
efaf0ba4 2647 something different for N_UNDF. */
252b5132
RH		 2648#ifdef TC_I960
2649 /* Makes no sense to use the difference of 2 arbitrary symbols
2650 as the target of a call instruction. */
2651 if (fixP->fx_tcbit)
2652 as_bad_where (fixP->fx_file, fixP->fx_line,
2653 _("callj to difference of 2 symbols"));
efaf0ba4 2654#endif /* TC_I960 */
252b5132
RH		 2655 add_number += S_GET_VALUE (add_symbolP) -
2656 S_GET_VALUE (sub_symbolP);
2657
2658 add_symbolP = NULL;
efaf0ba4 2659 pcrel = 0; /* No further pcrel processing. */
252b5132
RH		 2660
2661 /* Let the target machine make the final determination
2662 as to whether or not a relocation will be needed to
2663 handle this fixup. */
2664 if (!TC_FORCE_RELOCATION_SECTION (fixP, this_segment_type))
2665 {
2666 fixP->fx_pcrel = 0;
2667 fixP->fx_addsy = NULL;
2668 fixP->fx_subsy = NULL;
2669 }
2670 }
2671 else
2672 {
efaf0ba4 2673 /* Different segments in subtraction. */
252b5132
RH		 2674 know (!(S_IS_EXTERNAL (sub_symbolP)
2675 && (S_GET_SEGMENT (sub_symbolP) == absolute_section)));
2676
2677 if ((S_GET_SEGMENT (sub_symbolP) == absolute_section))
2678 add_number -= S_GET_VALUE (sub_symbolP);
2679
2680#ifdef DIFF_EXPR_OK
2681 else if (S_GET_SEGMENT (sub_symbolP) == this_segment_type
efaf0ba4
NC		 2682#if 0
2683 /* Do this even if it's already described as
2684 pc-relative. For example, on the m68k, an
2685 operand of "pc@(foo-.-2)" should address
2686 "foo" in a pc-relative mode. */
252b5132
RH		 2687 && pcrel
2688#endif
2689 )
2690 {
2691 /* Make it pc-relative. */
2692 add_number += (MD_PCREL_FROM_SECTION (fixP, this_segment_type)
2693 - S_GET_VALUE (sub_symbolP));
2694 pcrel = 1;
2695 fixP->fx_pcrel = 1;
2696 sub_symbolP = 0;
2697 fixP->fx_subsy = 0;
2698 }
2699#endif
2700#ifdef UNDEFINED_DIFFERENCE_OK
2701 /* The PA needs this for PIC code generation. We basically
2702 don't want to do anything if we have the difference of two
2703 symbols at this point. */
2704 else if (1)
2705 {
2706 /* Leave it alone. */
2707 }
2708#endif
2709#ifdef BFD_ASSEMBLER
2710 else if (fixP->fx_r_type == BFD_RELOC_GPREL32
2711 || fixP->fx_r_type == BFD_RELOC_GPREL16)
2712 {
2713 /* Leave it alone. */
2714 }
2715#endif
2716 else
2717 {
2718 char buf[50];
2719 sprint_value (buf, fragP->fr_address + where);
2720 as_bad_where (fixP->fx_file, fixP->fx_line,
2721 _("Subtraction of two symbols in different sections \"%s\" {%s section} - \"%s\" {%s section} at file address %s."),
2722 S_GET_NAME (add_symbolP),
2723 segment_name (S_GET_SEGMENT (add_symbolP)),
2724 S_GET_NAME (sub_symbolP),
2725 segment_name (S_GET_SEGMENT (sub_symbolP)),
2726 buf);
2727 }
2728 }
2729 }
2730
2731 if (add_symbolP)
2732 {
2733 if (add_symbol_segment == this_segment_type && pcrel && !plt
2734 && TC_RELOC_RTSYM_LOC_FIXUP (fixP))
2735 {
efaf0ba4
NC		 2736 /* This fixup was made when the symbol's segment was
2737 SEG_UNKNOWN, but it is now in the local segment.
2738 So we know how to do the address without relocation. */
252b5132
RH		 2739#ifdef TC_I960
2740 /* reloc_callj() may replace a 'call' with a 'calls' or a
2741 'bal', in which cases it modifies *fixP as appropriate.
2742 In the case of a 'calls', no further work is required,
2743 and *fixP has been set up to make the rest of the code
efaf0ba4 2744 below a no-op. */
252b5132 2745 reloc_callj (fixP);
efaf0ba4 2746#endif /* TC_I960 */
252b5132
RH		 2747
2748 add_number += S_GET_VALUE (add_symbolP);
2749 add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment_type);
efaf0ba4
NC		 2750 /* Lie. Don't want further pcrel processing. */
2751 pcrel = 0;
252b5132
RH		 2752
2753 /* Let the target machine make the final determination
2754 as to whether or not a relocation will be needed to
2755 handle this fixup. */
2756 if (!TC_FORCE_RELOCATION (fixP))
2757 {
2758 fixP->fx_pcrel = 0;
2759 fixP->fx_addsy = NULL;
2760 }
2761 }
2762 else
2763 {
2764 if (add_symbol_segment == absolute_section
2765 && ! pcrel)
2766 {
2767#ifdef TC_I960
2768 /* See comment about reloc_callj() above. */
2769 reloc_callj (fixP);
efaf0ba4 2770#endif /* TC_I960 */
252b5132
RH		 2771 add_number += S_GET_VALUE (add_symbolP);
2772
2773 /* Let the target machine make the final determination
2774 as to whether or not a relocation will be needed to
2775 handle this fixup. */
2776
2777 if (!TC_FORCE_RELOCATION (fixP))
2778 {
2779 fixP->fx_addsy = NULL;
2780 add_symbolP = NULL;
2781 }
2782 }
2783 else if (add_symbol_segment == undefined_section
2784#ifdef BFD_ASSEMBLER
2785 || bfd_is_com_section (add_symbol_segment)
2786#endif
2787 )
2788 {
2789#ifdef TC_I960
2790 if ((int) fixP->fx_bit_fixP == 13)
2791 {
2792 /* This is a COBR instruction. They have only a
efaf0ba4
NC		 2793 13-bit displacement and are only to be used
2794 for local branches: flag as error, don't generate
2795 relocation. */
252b5132
RH		 2796 as_bad_where (fixP->fx_file, fixP->fx_line,
2797 _("can't use COBR format with external label"));
2798 fixP->fx_addsy = NULL;
2799 fixP->fx_done = 1;
2800 continue;
efaf0ba4
NC		 2801 } /* COBR. */
2802#endif /* TC_I960 */
252b5132
RH		 2803
2804#ifdef OBJ_COFF
2805#ifdef TE_I386AIX
2806 if (S_IS_COMMON (add_symbolP))
2807 add_number += S_GET_VALUE (add_symbolP);
efaf0ba4
NC		 2808#endif /* TE_I386AIX */
2809#endif /* OBJ_COFF */
252b5132
RH		 2810 ++seg_reloc_count;
2811 }
2812 else
2813 {
2814 seg_reloc_count++;
8f36cd18 2815 if (TC_FIX_ADJUSTABLE (fixP))
02198638 2816 add_number += S_GET_VALUE (add_symbolP);
252b5132
RH		 2817 }
2818 }
2819 }
2820
2821 if (pcrel)
2822 {
2823 add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment_type);
2824 if (add_symbolP == 0)
2825 {
2826#ifndef BFD_ASSEMBLER
2827 fixP->fx_addsy = &abs_symbol;
2828#else
2829 fixP->fx_addsy = section_symbol (absolute_section);
2830#endif
49309057 2831 symbol_mark_used_in_reloc (fixP->fx_addsy);
252b5132
RH		 2832 ++seg_reloc_count;
2833 }
2834 }
2835
6d4d30bb
AM		 2836 if (!fixP->fx_done)
2837 {
2838#ifdef MD_APPLY_FIX3
2839 md_apply_fix3 (fixP, &add_number, this_segment_type);
2840#else
2841#ifdef BFD_ASSEMBLER
2842 md_apply_fix (fixP, &add_number);
2843#else
2844 md_apply_fix (fixP, add_number);
2845#endif
2846#endif
2847
2848#ifndef TC_HANDLES_FX_DONE
2849 /* If the tc-* files haven't been converted, assume it's handling
2850 it the old way, where a null fx_addsy means that the fix has
2851 been applied completely, and no further work is needed. */
2852 if (fixP->fx_addsy == 0 && fixP->fx_pcrel == 0)
2853 fixP->fx_done = 1;
2854#endif
2855 }
2856
252b5132
RH		 2857 if (!fixP->fx_bit_fixP && !fixP->fx_no_overflow && size > 0)
2858 {
2859 if ((size_t) size < sizeof (valueT))
2860 {
b77ad1d4 2861 valueT mask;
252b5132 2862
252b5132 2863 mask = 0;
efaf0ba4 2864 mask--; /* Set all bits to one. */
b77ad1d4
AM		 2865 mask <<= size * 8 - (fixP->fx_signed ? 1 : 0);
2866 if ((add_number & mask) != 0 && (add_number & mask) != mask)
252b5132
RH		 2867 {
2868 char buf[50], buf2[50];
2869 sprint_value (buf, fragP->fr_address + where);
2870 if (add_number > 1000)
2871 sprint_value (buf2, add_number);
2872 else
2873 sprintf (buf2, "%ld", (long) add_number);
2874 as_bad_where (fixP->fx_file, fixP->fx_line,
2875 _("Value of %s too large for field of %d bytes at %s"),
2876 buf2, size, buf);
efaf0ba4 2877 } /* Generic error checking. */
252b5132
RH		 2878 }
2879#ifdef WARN_SIGNED_OVERFLOW_WORD
2880 /* Warn if a .word value is too large when treated as a signed
2881 number. We already know it is not too negative. This is to
2882 catch over-large switches generated by gcc on the 68k. */
2883 if (!flag_signed_overflow_ok
2884 && size == 2
2885 && add_number > 0x7fff)
2886 as_bad_where (fixP->fx_file, fixP->fx_line,
2887 _("Signed .word overflow; switch may be too large; %ld at 0x%lx"),
2888 (long) add_number,
2889 (unsigned long) (fragP->fr_address + where));
2890#endif
efaf0ba4 2891 } /* Not a bit fix. */
252b5132 2892
252b5132 2893#ifdef TC_VALIDATE_FIX
ab9da554
ILT		 2894 skip: ATTRIBUTE_UNUSED_LABEL
2895 ;
252b5132
RH		 2896#endif
2897#ifdef DEBUG5
2898 fprintf (stderr, "result:\n");
2899 print_fixup (fixP);
2900#endif
efaf0ba4 2901 } /* For each fixS in this segment. */
252b5132
RH		 2902
2903 TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count);
2904 return seg_reloc_count;
2905}
2906
2907#endif /* defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS)) */
2908
2909void
2910number_to_chars_bigendian (buf, val, n)
2911 char *buf;
2912 valueT val;
2913 int n;
2914{
2915 if ((size_t) n > sizeof (val) || n <= 0)
2916 abort ();
2917 while (n--)
2918 {
2919 buf[n] = val & 0xff;
2920 val >>= 8;
2921 }
2922}
2923
2924void
2925number_to_chars_littleendian (buf, val, n)
2926 char *buf;
2927 valueT val;
2928 int n;
2929{
2930 if ((size_t) n > sizeof (val) || n <= 0)
2931 abort ();
2932 while (n--)
2933 {
2934 *buf++ = val & 0xff;
2935 val >>= 8;
2936 }
2937}
2938
2939void
2940write_print_statistics (file)
2941 FILE *file;
2942{
6d4d30bb 2943 fprintf (file, "fixups: %d\n", n_fixups);
252b5132
RH		 2944}
2945
efaf0ba4 2946/* For debugging. */
252b5132
RH		 2947extern int indent_level;
2948
2949void
2950print_fixup (fixp)
2951 fixS *fixp;
2952{
2953 indent_level = 1;
2954 fprintf (stderr, "fix %lx %s:%d", (long) fixp, fixp->fx_file, fixp->fx_line);
2955 if (fixp->fx_pcrel)
2956 fprintf (stderr, " pcrel");
2957 if (fixp->fx_pcrel_adjust)
2958 fprintf (stderr, " pcrel_adjust=%d", fixp->fx_pcrel_adjust);
2959 if (fixp->fx_im_disp)
2960 {
2961#ifdef TC_NS32K
2962 fprintf (stderr, " im_disp=%d", fixp->fx_im_disp);
2963#else
2964 fprintf (stderr, " im_disp");
2965#endif
2966 }
2967 if (fixp->fx_tcbit)
2968 fprintf (stderr, " tcbit");
2969 if (fixp->fx_done)
2970 fprintf (stderr, " done");
2971 fprintf (stderr, "\n size=%d frag=%lx where=%ld offset=%lx addnumber=%lx",
2972 fixp->fx_size, (long) fixp->fx_frag, (long) fixp->fx_where,
2973 (long) fixp->fx_offset, (long) fixp->fx_addnumber);
2974#ifdef BFD_ASSEMBLER
2975 fprintf (stderr, "\n %s (%d)", bfd_get_reloc_code_name (fixp->fx_r_type),
2976 fixp->fx_r_type);
2977#else
2978#ifdef NEED_FX_R_TYPE
2979 fprintf (stderr, " r_type=%d", fixp->fx_r_type);
2980#endif
2981#endif
2982 if (fixp->fx_addsy)
2983 {
2984 fprintf (stderr, "\n +<");
2985 print_symbol_value_1 (stderr, fixp->fx_addsy);
2986 fprintf (stderr, ">");
2987 }
2988 if (fixp->fx_subsy)
2989 {
2990 fprintf (stderr, "\n -<");
2991 print_symbol_value_1 (stderr, fixp->fx_subsy);
2992 fprintf (stderr, ">");
2993 }
2994 fprintf (stderr, "\n");
2995#ifdef TC_FIX_DATA_PRINT
2996 TC_FIX_DATA_PRINT (stderr, fixp);
2997#endif
2998}
GDB Binutils - Deliverables
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