1 /* write.c - emit .o file
2 Copyright 1986, 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
3 1998, 1999, 2000, 2001, 2002, 2003
4 Free Software Foundation, Inc.
6 This file is part of GAS, the GNU Assembler.
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)
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.
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
23 /* This thing should be set up to do byteordering correctly. But... */
28 #include "output-file.h"
29 #include "dwarf2dbg.h"
31 #ifndef TC_ADJUST_RELOC_COUNT
32 #define TC_ADJUST_RELOC_COUNT(FIX, COUNT)
35 #ifndef TC_FORCE_RELOCATION
36 #define TC_FORCE_RELOCATION(FIX) \
37 (generic_force_reloc (FIX))
40 #ifndef TC_FORCE_RELOCATION_ABS
41 #define TC_FORCE_RELOCATION_ABS(FIX) \
42 (TC_FORCE_RELOCATION (FIX))
45 #ifndef TC_FORCE_RELOCATION_LOCAL
46 #define TC_FORCE_RELOCATION_LOCAL(FIX) \
49 || TC_FORCE_RELOCATION (FIX))
52 #ifndef TC_FORCE_RELOCATION_SUB_SAME
53 #define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEG) \
57 #ifndef TC_FORCE_RELOCATION_SUB_ABS
58 #define TC_FORCE_RELOCATION_SUB_ABS(FIX) 0
61 #ifndef TC_FORCE_RELOCATION_SUB_LOCAL
63 #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX) 0
65 #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX) 1
69 #ifndef TC_VALIDATE_FIX_SUB
70 #ifdef UNDEFINED_DIFFERENCE_OK
71 /* The PA needs this for PIC code generation. */
72 #define TC_VALIDATE_FIX_SUB(FIX) 1
75 #define TC_VALIDATE_FIX_SUB(FIX) \
76 ((FIX)->fx_r_type == BFD_RELOC_GPREL32 \
77 || (FIX)->fx_r_type == BFD_RELOC_GPREL16)
79 #define TC_VALIDATE_FIX_SUB(FIX) 0
84 #ifndef TC_LINKRELAX_FIXUP
85 #define TC_LINKRELAX_FIXUP(SEG) 1
88 #ifndef MD_APPLY_SYM_VALUE
89 #define MD_APPLY_SYM_VALUE(FIX) 1
92 #ifndef TC_FINALIZE_SYMS_BEFORE_SIZE_SEG
93 #define TC_FINALIZE_SYMS_BEFORE_SIZE_SEG 1
96 #ifndef MD_PCREL_FROM_SECTION
97 #define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from (FIX)
100 #ifndef WORKING_DOT_WORD
101 extern const int md_short_jump_size;
102 extern const int md_long_jump_size;
105 /* Used to control final evaluation of expressions. */
106 int finalize_syms = 0;
108 int symbol_table_frozen;
110 symbolS *abs_section_sym;
112 /* Remember the value of dot when parsing expressions. */
115 void print_fixup PARAMS ((fixS *));
118 static void renumber_sections PARAMS ((bfd *, asection *, PTR));
120 /* We generally attach relocs to frag chains. However, after we have
121 chained these all together into a segment, any relocs we add after
122 that must be attached to a segment. This will include relocs added
123 in md_estimate_size_for_relax, for example. */
124 static int frags_chained = 0;
127 #ifndef BFD_ASSEMBLER
129 #ifndef MANY_SEGMENTS
130 struct frag *text_frag_root;
131 struct frag *data_frag_root;
132 struct frag *bss_frag_root;
134 struct frag *text_last_frag; /* Last frag in segment. */
135 struct frag *data_last_frag; /* Last frag in segment. */
136 static struct frag *bss_last_frag; /* Last frag in segment. */
140 static object_headers headers;
143 long string_byte_count;
144 char *next_object_file_charP; /* Tracks object file bytes. */
147 int magic_number_for_object_file = DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE;
150 #endif /* BFD_ASSEMBLER */
155 #define RELOC_ENUM enum bfd_reloc_code_real
157 #define RELOC_ENUM int
160 static fixS *fix_new_internal PARAMS ((fragS *, int where, int size,
161 symbolS *add, symbolS *sub,
162 offsetT offset, int pcrel,
164 #if defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS))
165 static long fixup_segment PARAMS ((fixS *, segT));
167 static relax_addressT relax_align PARAMS ((relax_addressT addr, int align));
168 #if defined (BFD_ASSEMBLER) || ! defined (BFD)
169 static fragS *chain_frchains_together_1 PARAMS ((segT, struct frchain *));
172 static void chain_frchains_together PARAMS ((bfd *, segT, PTR));
173 static void cvt_frag_to_fill PARAMS ((segT, fragS *));
174 static void adjust_reloc_syms PARAMS ((bfd *, asection *, PTR));
175 static void fix_segment PARAMS ((bfd *, asection *, PTR));
176 static void write_relocs PARAMS ((bfd *, asection *, PTR));
177 static void write_contents PARAMS ((bfd *, asection *, PTR));
178 static void set_symtab PARAMS ((void));
180 #if defined (BFD_ASSEMBLER) || (! defined (BFD) && ! defined (OBJ_AOUT))
181 static void merge_data_into_text PARAMS ((void));
183 #if ! defined (BFD_ASSEMBLER) && ! defined (BFD)
184 static void cvt_frag_to_fill PARAMS ((object_headers *, segT, fragS *));
185 static void remove_subsegs PARAMS ((frchainS *, int, fragS **, fragS **));
186 static void relax_and_size_all_segments PARAMS ((void));
189 /* Create a fixS in obstack 'notes'. */
192 fix_new_internal (frag, where, size, add_symbol, sub_symbol, offset, pcrel,
194 fragS *frag; /* Which frag? */
195 int where; /* Where in that frag? */
196 int size; /* 1, 2, or 4 usually. */
197 symbolS *add_symbol; /* X_add_symbol. */
198 symbolS *sub_symbol; /* X_op_symbol. */
199 offsetT offset; /* X_add_number. */
200 int pcrel; /* TRUE if PC-relative relocation. */
201 RELOC_ENUM r_type ATTRIBUTE_UNUSED; /* Relocation type. */
207 fixP = (fixS *) obstack_alloc (¬es, sizeof (fixS));
209 fixP->fx_frag = frag;
210 fixP->fx_where = where;
211 fixP->fx_size = size;
212 /* We've made fx_size a narrow field; check that it's wide enough. */
213 if (fixP->fx_size != size)
215 as_bad (_("field fx_size too small to hold %d"), size);
218 fixP->fx_addsy = add_symbol;
219 fixP->fx_subsy = sub_symbol;
220 fixP->fx_offset = offset;
221 fixP->fx_dot_value = dot_value;
222 fixP->fx_pcrel = pcrel;
224 #if defined(NEED_FX_R_TYPE) || defined (BFD_ASSEMBLER)
225 fixP->fx_r_type = r_type;
227 fixP->fx_im_disp = 0;
228 fixP->fx_pcrel_adjust = 0;
229 fixP->fx_bit_fixP = 0;
230 fixP->fx_addnumber = 0;
233 fixP->fx_no_overflow = 0;
237 fixP->fx_cgen.insn = NULL;
238 fixP->fx_cgen.opinfo = 0;
242 TC_INIT_FIX_DATA (fixP);
245 as_where (&fixP->fx_file, &fixP->fx_line);
247 /* Usually, we want relocs sorted numerically, but while
248 comparing to older versions of gas that have relocs
249 reverse sorted, it is convenient to have this compile
250 time option. xoxorich. */
254 fixS **seg_fix_rootP = (frags_chained
255 ? &seg_info (now_seg)->fix_root
256 : &frchain_now->fix_root);
257 fixS **seg_fix_tailP = (frags_chained
258 ? &seg_info (now_seg)->fix_tail
259 : &frchain_now->fix_tail);
262 #ifdef REVERSE_SORT_RELOCS
264 fixP->fx_next = *seg_fix_rootP;
265 *seg_fix_rootP = fixP;
267 #else /* REVERSE_SORT_RELOCS */
269 fixP->fx_next = NULL;
272 (*seg_fix_tailP)->fx_next = fixP;
274 *seg_fix_rootP = fixP;
275 *seg_fix_tailP = fixP;
277 #endif /* REVERSE_SORT_RELOCS */
283 /* Create a fixup relative to a symbol (plus a constant). */
286 fix_new (frag, where, size, add_symbol, offset, pcrel, r_type)
287 fragS *frag; /* Which frag? */
288 int where; /* Where in that frag? */
289 int size; /* 1, 2, or 4 usually. */
290 symbolS *add_symbol; /* X_add_symbol. */
291 offsetT offset; /* X_add_number. */
292 int pcrel; /* TRUE if PC-relative relocation. */
293 RELOC_ENUM r_type; /* Relocation type. */
295 return fix_new_internal (frag, where, size, add_symbol,
296 (symbolS *) NULL, offset, pcrel, r_type);
299 /* Create a fixup for an expression. Currently we only support fixups
300 for difference expressions. That is itself more than most object
301 file formats support anyhow. */
304 fix_new_exp (frag, where, size, exp, pcrel, r_type)
305 fragS *frag; /* Which frag? */
306 int where; /* Where in that frag? */
307 int size; /* 1, 2, or 4 usually. */
308 expressionS *exp; /* Expression. */
309 int pcrel; /* TRUE if PC-relative relocation. */
310 RELOC_ENUM r_type; /* Relocation type. */
322 as_bad (_("register value used as expression"));
326 /* This comes up when _GLOBAL_OFFSET_TABLE_+(.-L0) is read, if
327 the difference expression cannot immediately be reduced. */
329 symbolS *stmp = make_expr_symbol (exp);
331 exp->X_op = O_symbol;
332 exp->X_op_symbol = 0;
333 exp->X_add_symbol = stmp;
334 exp->X_add_number = 0;
336 return fix_new_exp (frag, where, size, exp, pcrel, r_type);
340 add = exp->X_add_symbol;
341 off = exp->X_add_number;
343 #if defined(BFD_ASSEMBLER)
344 r_type = BFD_RELOC_RVA;
346 #if defined(TC_RVA_RELOC)
347 r_type = TC_RVA_RELOC;
349 as_fatal (_("rva not supported"));
355 sub = exp->X_add_symbol;
356 off = exp->X_add_number;
360 sub = exp->X_op_symbol;
363 add = exp->X_add_symbol;
366 off = exp->X_add_number;
370 add = make_expr_symbol (exp);
374 return fix_new_internal (frag, where, size, add, sub, off, pcrel, r_type);
377 /* Generic function to determine whether a fixup requires a relocation. */
379 generic_force_reloc (fix)
383 if (fix->fx_r_type == BFD_RELOC_VTABLE_INHERIT
384 || fix->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
387 return S_FORCE_RELOC (fix->fx_addsy, fix->fx_subsy == NULL);
390 /* Append a string onto another string, bumping the pointer along. */
392 append (charPP, fromP, length)
395 unsigned long length;
397 /* Don't trust memcpy() of 0 chars. */
401 memcpy (*charPP, fromP, length);
405 #ifndef BFD_ASSEMBLER
406 int section_alignment[SEG_MAXIMUM_ORDINAL];
409 /* This routine records the largest alignment seen for each segment.
410 If the beginning of the segment is aligned on the worst-case
411 boundary, all of the other alignments within it will work. At
412 least one object format really uses this info. */
415 record_alignment (seg, align)
416 /* Segment to which alignment pertains. */
418 /* Alignment, as a power of 2 (e.g., 1 => 2-byte boundary, 2 => 4-byte
422 if (seg == absolute_section)
425 if ((unsigned int) align > bfd_get_section_alignment (stdoutput, seg))
426 bfd_set_section_alignment (stdoutput, seg, align);
428 if (align > section_alignment[(int) seg])
429 section_alignment[(int) seg] = align;
434 get_recorded_alignment (seg)
437 if (seg == absolute_section)
440 return bfd_get_section_alignment (stdoutput, seg);
442 return section_alignment[(int) seg];
448 /* Reset the section indices after removing the gas created sections. */
451 renumber_sections (abfd, sec, countparg)
452 bfd *abfd ATTRIBUTE_UNUSED;
456 int *countp = (int *) countparg;
458 sec->index = *countp;
462 #endif /* defined (BFD_ASSEMBLER) */
464 #if defined (BFD_ASSEMBLER) || ! defined (BFD)
467 chain_frchains_together_1 (section, frchp)
469 struct frchain *frchp;
471 fragS dummy, *prev_frag = &dummy;
473 fixS fix_dummy, *prev_fix = &fix_dummy;
476 for (; frchp && frchp->frch_seg == section; frchp = frchp->frch_next)
478 prev_frag->fr_next = frchp->frch_root;
479 prev_frag = frchp->frch_last;
480 assert (prev_frag->fr_type != 0);
482 if (frchp->fix_root != (fixS *) NULL)
484 if (seg_info (section)->fix_root == (fixS *) NULL)
485 seg_info (section)->fix_root = frchp->fix_root;
486 prev_fix->fx_next = frchp->fix_root;
487 seg_info (section)->fix_tail = frchp->fix_tail;
488 prev_fix = frchp->fix_tail;
492 assert (prev_frag->fr_type != 0);
493 prev_frag->fr_next = 0;
502 chain_frchains_together (abfd, section, xxx)
503 bfd *abfd ATTRIBUTE_UNUSED;
505 PTR xxx ATTRIBUTE_UNUSED;
507 segment_info_type *info;
509 /* BFD may have introduced its own sections without using
510 subseg_new, so it is possible that seg_info is NULL. */
511 info = seg_info (section);
512 if (info != (segment_info_type *) NULL)
513 info->frchainP->frch_last
514 = chain_frchains_together_1 (section, info->frchainP);
516 /* Now that we've chained the frags together, we must add new fixups
517 to the segment, not to the frag chain. */
523 #if !defined (BFD) && !defined (BFD_ASSEMBLER)
526 remove_subsegs (head, seg, root, last)
532 *root = head->frch_root;
533 *last = chain_frchains_together_1 (seg, head);
538 #if defined (BFD_ASSEMBLER) || !defined (BFD)
542 cvt_frag_to_fill (sec, fragP)
543 segT sec ATTRIBUTE_UNUSED;
547 cvt_frag_to_fill (headersP, sec, fragP)
548 object_headers *headersP;
553 switch (fragP->fr_type)
561 HANDLE_ALIGN (fragP);
563 know (fragP->fr_next != NULL);
564 fragP->fr_offset = (fragP->fr_next->fr_address
566 - fragP->fr_fix) / fragP->fr_var;
567 if (fragP->fr_offset < 0)
569 as_bad_where (fragP->fr_file, fragP->fr_line,
570 _("attempt to .org/.space backwards? (%ld)"),
571 (long) fragP->fr_offset);
572 fragP->fr_offset = 0;
574 fragP->fr_type = rs_fill;
582 valueT value = S_GET_VALUE (fragP->fr_symbol);
585 size = output_leb128 (fragP->fr_literal + fragP->fr_fix, value,
588 fragP->fr_fix += size;
589 fragP->fr_type = rs_fill;
591 fragP->fr_offset = 0;
592 fragP->fr_symbol = NULL;
597 eh_frame_convert_frag (fragP);
601 dwarf2dbg_convert_frag (fragP);
604 case rs_machine_dependent:
606 md_convert_frag (stdoutput, sec, fragP);
608 md_convert_frag (headersP, sec, fragP);
611 assert (fragP->fr_next == NULL
612 || ((offsetT) (fragP->fr_next->fr_address - fragP->fr_address)
615 /* After md_convert_frag, we make the frag into a ".space 0".
616 md_convert_frag() should set up any fixSs and constants
621 #ifndef WORKING_DOT_WORD
624 struct broken_word *lie;
626 if (fragP->fr_subtype)
628 fragP->fr_fix += md_short_jump_size;
629 for (lie = (struct broken_word *) (fragP->fr_symbol);
630 lie && lie->dispfrag == fragP;
631 lie = lie->next_broken_word)
633 fragP->fr_fix += md_long_jump_size;
641 BAD_CASE (fragP->fr_type);
646 #endif /* defined (BFD_ASSEMBLER) || !defined (BFD) */
649 static void relax_seg PARAMS ((bfd *, asection *, PTR));
651 relax_seg (abfd, sec, xxx)
652 bfd *abfd ATTRIBUTE_UNUSED;
656 segment_info_type *seginfo = seg_info (sec);
658 if (seginfo && seginfo->frchainP
659 && relax_segment (seginfo->frchainP->frch_root, sec))
661 int *result = (int *) xxx;
666 static void size_seg PARAMS ((bfd *, asection *, PTR));
668 size_seg (abfd, sec, xxx)
671 PTR xxx ATTRIBUTE_UNUSED;
675 segment_info_type *seginfo;
677 valueT size, newsize;
679 subseg_change (sec, 0);
681 seginfo = seg_info (sec);
682 if (seginfo && seginfo->frchainP)
684 for (fragp = seginfo->frchainP->frch_root; fragp; fragp = fragp->fr_next)
685 cvt_frag_to_fill (sec, fragp);
686 for (fragp = seginfo->frchainP->frch_root;
688 fragp = fragp->fr_next)
689 /* Walk to last elt. */
691 size = fragp->fr_address + fragp->fr_fix;
696 flags = bfd_get_section_flags (abfd, sec);
698 if (size > 0 && ! seginfo->bss)
699 flags |= SEC_HAS_CONTENTS;
701 /* @@ This is just an approximation. */
702 if (seginfo && seginfo->fix_root)
706 x = bfd_set_section_flags (abfd, sec, flags);
709 newsize = md_section_align (sec, size);
710 x = bfd_set_section_size (abfd, sec, newsize);
713 /* If the size had to be rounded up, add some padding in the last
715 assert (newsize >= size);
718 fragS *last = seginfo->frchainP->frch_last;
719 fragp = seginfo->frchainP->frch_root;
720 while (fragp->fr_next != last)
721 fragp = fragp->fr_next;
722 last->fr_address = size;
723 if ((newsize - size) % fragp->fr_var == 0)
724 fragp->fr_offset += (newsize - size) / fragp->fr_var;
726 /* If we hit this abort, it's likely due to subsegs_finish not
727 providing sufficient alignment on the last frag, and the
728 machine dependent code using alignment frags with fr_var
733 #ifdef tc_frob_section
734 tc_frob_section (sec);
736 #ifdef obj_frob_section
737 obj_frob_section (sec);
743 dump_section_relocs (abfd, sec, stream_)
744 bfd *abfd ATTRIBUTE_UNUSED;
748 FILE *stream = (FILE *) stream_;
749 segment_info_type *seginfo = seg_info (sec);
750 fixS *fixp = seginfo->fix_root;
755 fprintf (stream, "sec %s relocs:\n", sec->name);
758 symbolS *s = fixp->fx_addsy;
760 fprintf (stream, " %08lx: type %d ", (unsigned long) fixp,
761 (int) fixp->fx_r_type);
763 fprintf (stream, "no sym\n");
766 print_symbol_value_1 (stream, s);
767 fprintf (stream, "\n");
769 fixp = fixp->fx_next;
773 #define dump_section_relocs(ABFD,SEC,STREAM) ((void) 0)
776 #ifndef EMIT_SECTION_SYMBOLS
777 #define EMIT_SECTION_SYMBOLS 1
780 /* This pass over fixups decides whether symbols can be replaced with
784 adjust_reloc_syms (abfd, sec, xxx)
785 bfd *abfd ATTRIBUTE_UNUSED;
787 PTR xxx ATTRIBUTE_UNUSED;
789 segment_info_type *seginfo = seg_info (sec);
795 dump_section_relocs (abfd, sec, stderr);
797 for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next)
801 else if (fixp->fx_addsy)
807 fprintf (stderr, "\n\nadjusting fixup:\n");
811 sym = fixp->fx_addsy;
813 /* All symbols should have already been resolved at this
814 point. It is possible to see unresolved expression
815 symbols, though, since they are not in the regular symbol
817 resolve_symbol_value (sym);
819 if (fixp->fx_subsy != NULL)
820 resolve_symbol_value (fixp->fx_subsy);
822 /* If this symbol is equated to an undefined symbol, convert
823 the fixup to being against that symbol. */
824 if (symbol_equated_reloc_p (sym))
826 fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number;
827 sym = symbol_get_value_expression (sym)->X_add_symbol;
828 fixp->fx_addsy = sym;
831 if (symbol_mri_common_p (sym))
833 /* These symbols are handled specially in fixup_segment. */
837 /* If the symbol is undefined, common, weak, or global (ELF
838 shared libs), we can't replace it with the section symbol. */
839 if (S_FORCE_RELOC (fixp->fx_addsy, 1))
842 /* Is there some other (target cpu dependent) reason we can't adjust
843 this one? (E.g. relocations involving function addresses on
845 #ifdef tc_fix_adjustable
846 if (! tc_fix_adjustable (fixp))
850 /* Since we're reducing to section symbols, don't attempt to reduce
851 anything that's already using one. */
852 if (symbol_section_p (sym))
855 symsec = S_GET_SEGMENT (sym);
859 if (bfd_is_abs_section (symsec))
861 /* The fixup_segment routine normally will not use this
862 symbol in a relocation. */
866 /* Don't try to reduce relocs which refer to non-local symbols
867 in .linkonce sections. It can lead to confusion when a
868 debugging section refers to a .linkonce section. I hope
869 this will always be correct. */
870 if (symsec != sec && ! S_IS_LOCAL (sym))
872 if ((symsec->flags & SEC_LINK_ONCE) != 0
874 /* The GNU toolchain uses an extension for ELF: a
875 section beginning with the magic string
876 .gnu.linkonce is a linkonce section. */
877 && strncmp (segment_name (symsec), ".gnu.linkonce",
878 sizeof ".gnu.linkonce" - 1) == 0))
882 /* Never adjust a reloc against local symbol in a merge section
883 with non-zero addend. */
884 if ((symsec->flags & SEC_MERGE) != 0
885 && (fixp->fx_offset != 0 || fixp->fx_subsy != NULL))
888 /* Never adjust a reloc against TLS local symbol. */
889 if ((symsec->flags & SEC_THREAD_LOCAL) != 0)
892 /* We refetch the segment when calling section_symbol, rather
893 than using symsec, because S_GET_VALUE may wind up changing
894 the section when it calls resolve_symbol_value. */
895 fixp->fx_offset += S_GET_VALUE (sym);
896 fixp->fx_addsy = section_symbol (S_GET_SEGMENT (sym));
898 fprintf (stderr, "\nadjusted fixup:\n");
903 dump_section_relocs (abfd, sec, stderr);
907 fix_segment (abfd, sec, xxx)
908 bfd *abfd ATTRIBUTE_UNUSED;
910 PTR xxx ATTRIBUTE_UNUSED;
912 segment_info_type *seginfo = seg_info (sec);
914 fixup_segment (seginfo->fix_root, sec);
918 write_relocs (abfd, sec, xxx)
921 PTR xxx ATTRIBUTE_UNUSED;
923 segment_info_type *seginfo = seg_info (sec);
930 /* If seginfo is NULL, we did not create this section; don't do
936 for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next)
939 #ifndef RELOC_EXPANSION_POSSIBLE
940 /* Set up reloc information as well. */
941 relocs = (arelent **) xmalloc (n * sizeof (arelent *));
942 memset ((char *) relocs, 0, n * sizeof (arelent *));
945 for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next)
948 bfd_reloc_status_type s;
957 /* If this is an undefined symbol which was equated to another
958 symbol, then generate the reloc against the latter symbol
959 rather than the former. */
960 sym = fixp->fx_addsy;
961 while (symbol_equated_reloc_p (sym))
965 /* We must avoid looping, as that can occur with a badly
967 n = symbol_get_value_expression (sym)->X_add_symbol;
970 fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number;
973 fixp->fx_addsy = sym;
975 reloc = tc_gen_reloc (sec, fixp);
983 /* This test is triggered inappropriately for the SH. */
984 if (fixp->fx_where + fixp->fx_size
985 > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset)
989 s = bfd_install_relocation (stdoutput, reloc,
990 fixp->fx_frag->fr_literal,
991 fixp->fx_frag->fr_address,
997 case bfd_reloc_overflow:
998 as_bad_where (fixp->fx_file, fixp->fx_line,
999 _("relocation overflow"));
1001 case bfd_reloc_outofrange:
1002 as_bad_where (fixp->fx_file, fixp->fx_line,
1003 _("relocation out of range"));
1006 as_fatal (_("%s:%u: bad return from bfd_install_relocation: %x"),
1007 fixp->fx_file, fixp->fx_line, s);
1009 relocs[i++] = reloc;
1012 n = n * MAX_RELOC_EXPANSION;
1013 /* Set up reloc information as well. */
1014 relocs = (arelent **) xmalloc (n * sizeof (arelent *));
1017 for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next)
1020 bfd_reloc_status_type s;
1030 /* If this is an undefined symbol which was equated to another
1031 symbol, then generate the reloc against the latter symbol
1032 rather than the former. */
1033 sym = fixp->fx_addsy;
1034 while (symbol_equated_reloc_p (sym))
1038 /* We must avoid looping, as that can occur with a badly
1040 n = symbol_get_value_expression (sym)->X_add_symbol;
1043 fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number;
1046 fixp->fx_addsy = sym;
1048 reloc = tc_gen_reloc (sec, fixp);
1050 for (j = 0; reloc[j]; j++)
1052 relocs[i++] = reloc[j];
1055 if (fixp->fx_where + fixp->fx_size
1056 > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset)
1057 as_bad_where (fixp->fx_file, fixp->fx_line,
1058 _("internal error: fixup not contained within frag"));
1059 for (j = 0; reloc[j]; j++)
1061 s = bfd_install_relocation (stdoutput, reloc[j],
1062 fixp->fx_frag->fr_literal,
1063 fixp->fx_frag->fr_address,
1069 case bfd_reloc_overflow:
1070 as_bad_where (fixp->fx_file, fixp->fx_line,
1071 _("relocation overflow"));
1073 case bfd_reloc_outofrange:
1074 as_bad_where (fixp->fx_file, fixp->fx_line,
1075 _("relocation out of range"));
1078 as_fatal (_("%s:%u: bad return from bfd_install_relocation: %x"),
1079 fixp->fx_file, fixp->fx_line, s);
1090 sympp = bfd_get_outsymbols (stdoutput);
1091 nsyms = bfd_get_symcount (stdoutput);
1092 for (i = 0; i < n; i++)
1093 if (((*relocs[i]->sym_ptr_ptr)->flags & BSF_SECTION_SYM) == 0)
1095 for (j = 0; j < nsyms; j++)
1096 if (sympp[j] == *relocs[i]->sym_ptr_ptr)
1105 bfd_set_reloc (stdoutput, sec, relocs, n);
1107 bfd_set_section_flags (abfd, sec,
1108 (bfd_get_section_flags (abfd, sec)
1109 & (flagword) ~SEC_RELOC));
1111 #ifdef SET_SECTION_RELOCS
1112 SET_SECTION_RELOCS (sec, relocs, n);
1120 fprintf (stderr, "relocs for sec %s\n", sec->name);
1121 for (i = 0; i < n; i++)
1124 s = *r->sym_ptr_ptr;
1125 fprintf (stderr, " reloc %2d @%08x off %4x : sym %-10s addend %x\n",
1126 i, r, r->address, s->name, r->addend);
1133 write_contents (abfd, sec, xxx)
1134 bfd *abfd ATTRIBUTE_UNUSED;
1136 PTR xxx ATTRIBUTE_UNUSED;
1138 segment_info_type *seginfo = seg_info (sec);
1139 unsigned long offset = 0;
1142 /* Write out the frags. */
1144 || !(bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS))
1147 for (f = seginfo->frchainP->frch_root;
1152 unsigned long fill_size;
1156 assert (f->fr_type == rs_fill);
1159 x = bfd_set_section_contents (stdoutput, sec,
1160 f->fr_literal, (file_ptr) offset,
1161 (bfd_size_type) f->fr_fix);
1164 bfd_perror (stdoutput->filename);
1165 as_perror (_("FATAL: Can't write %s"), stdoutput->filename);
1166 exit (EXIT_FAILURE);
1168 offset += f->fr_fix;
1170 fill_literal = f->fr_literal + f->fr_fix;
1171 fill_size = f->fr_var;
1172 count = f->fr_offset;
1173 assert (count >= 0);
1174 if (fill_size && count)
1177 if (fill_size > sizeof (buf))
1179 /* Do it the old way. Can this ever happen? */
1182 x = bfd_set_section_contents (stdoutput, sec,
1185 (bfd_size_type) fill_size);
1188 bfd_perror (stdoutput->filename);
1189 as_perror (_("FATAL: Can't write %s"),
1190 stdoutput->filename);
1191 exit (EXIT_FAILURE);
1193 offset += fill_size;
1198 /* Build a buffer full of fill objects and output it as
1199 often as necessary. This saves on the overhead of
1200 potentially lots of bfd_set_section_contents calls. */
1204 n_per_buf = sizeof (buf);
1205 memset (buf, *fill_literal, n_per_buf);
1210 n_per_buf = sizeof (buf) / fill_size;
1211 for (i = n_per_buf, bufp = buf; i; i--, bufp += fill_size)
1212 memcpy (bufp, fill_literal, fill_size);
1214 for (; count > 0; count -= n_per_buf)
1216 n_per_buf = n_per_buf > count ? count : n_per_buf;
1217 x = bfd_set_section_contents
1218 (stdoutput, sec, buf, (file_ptr) offset,
1219 (bfd_size_type) n_per_buf * fill_size);
1221 as_fatal (_("cannot write to output file"));
1222 offset += n_per_buf * fill_size;
1230 #if defined(BFD_ASSEMBLER) || (!defined (BFD) && !defined(OBJ_AOUT))
1232 merge_data_into_text ()
1234 #if defined(BFD_ASSEMBLER) || defined(MANY_SEGMENTS)
1235 seg_info (text_section)->frchainP->frch_last->fr_next =
1236 seg_info (data_section)->frchainP->frch_root;
1237 seg_info (text_section)->frchainP->frch_last =
1238 seg_info (data_section)->frchainP->frch_last;
1239 seg_info (data_section)->frchainP = 0;
1243 text_last_frag->fr_next = data_frag_root;
1244 text_last_frag = data_last_frag;
1245 data_last_frag = NULL;
1246 data_frag_root = NULL;
1249 for (tmp = text_fix_root; tmp->fx_next; tmp = tmp->fx_next);;
1250 tmp->fx_next = data_fix_root;
1251 text_fix_tail = data_fix_tail;
1254 text_fix_root = data_fix_root;
1255 data_fix_root = NULL;
1258 #endif /* BFD_ASSEMBLER || (! BFD && ! OBJ_AOUT) */
1260 #if !defined (BFD_ASSEMBLER) && !defined (BFD)
1262 relax_and_size_all_segments ()
1266 relax_segment (text_frag_root, SEG_TEXT);
1267 relax_segment (data_frag_root, SEG_DATA);
1268 relax_segment (bss_frag_root, SEG_BSS);
1270 /* Now the addresses of frags are correct within the segment. */
1271 know (text_last_frag->fr_type == rs_fill && text_last_frag->fr_offset == 0);
1272 H_SET_TEXT_SIZE (&headers, text_last_frag->fr_address);
1273 text_last_frag->fr_address = H_GET_TEXT_SIZE (&headers);
1275 /* Join the 2 segments into 1 huge segment.
1276 To do this, re-compute every rn_address in the SEG_DATA frags.
1277 Then join the data frags after the text frags.
1279 Determine a_data [length of data segment]. */
1282 register relax_addressT slide;
1284 know ((text_last_frag->fr_type == rs_fill)
1285 && (text_last_frag->fr_offset == 0));
1287 H_SET_DATA_SIZE (&headers, data_last_frag->fr_address);
1288 data_last_frag->fr_address = H_GET_DATA_SIZE (&headers);
1289 slide = H_GET_TEXT_SIZE (&headers); /* & in file of the data segment. */
1291 #define RoundUp(N,S) (((N)+(S)-1)&-(S))
1292 /* For b.out: If the data section has a strict alignment
1293 requirement, its load address in the .o file will be
1294 rounded up from the size of the text section. These
1295 two values are *not* the same! Similarly for the bss
1297 slide = RoundUp (slide, 1 << section_alignment[SEG_DATA]);
1300 for (fragP = data_frag_root; fragP; fragP = fragP->fr_next)
1301 fragP->fr_address += slide;
1303 know (text_last_frag != 0);
1304 text_last_frag->fr_next = data_frag_root;
1308 H_SET_DATA_SIZE (&headers, 0);
1312 /* See above comments on b.out data section address. */
1315 if (data_last_frag == 0)
1316 bss_vma = H_GET_TEXT_SIZE (&headers);
1318 bss_vma = data_last_frag->fr_address;
1319 bss_vma = RoundUp (bss_vma, 1 << section_alignment[SEG_BSS]);
1320 bss_address_frag.fr_address = bss_vma;
1322 #else /* ! OBJ_BOUT */
1323 bss_address_frag.fr_address = (H_GET_TEXT_SIZE (&headers) +
1324 H_GET_DATA_SIZE (&headers));
1326 #endif /* ! OBJ_BOUT */
1328 /* Slide all the frags. */
1331 relax_addressT slide = bss_address_frag.fr_address;
1333 for (fragP = bss_frag_root; fragP; fragP = fragP->fr_next)
1334 fragP->fr_address += slide;
1338 H_SET_BSS_SIZE (&headers,
1339 bss_last_frag->fr_address - bss_frag_root->fr_address);
1341 H_SET_BSS_SIZE (&headers, 0);
1343 #endif /* ! BFD_ASSEMBLER && ! BFD */
1345 #if defined (BFD_ASSEMBLER) || !defined (BFD)
1347 #ifdef BFD_ASSEMBLER
1355 extern PTR bfd_alloc PARAMS ((bfd *, bfd_size_type));
1357 /* Count symbols. We can't rely on a count made by the loop in
1358 write_object_file, because *_frob_file may add a new symbol or
1361 for (symp = symbol_rootP; symp; symp = symbol_next (symp))
1367 bfd_size_type amt = (bfd_size_type) nsyms * sizeof (asymbol *);
1369 asympp = (asymbol **) bfd_alloc (stdoutput, amt);
1370 symp = symbol_rootP;
1371 for (i = 0; i < nsyms; i++, symp = symbol_next (symp))
1373 asympp[i] = symbol_get_bfdsym (symp);
1374 symbol_mark_written (symp);
1379 result = bfd_set_symtab (stdoutput, asympp, nsyms);
1381 symbol_table_frozen = 1;
1385 /* Finish the subsegments. After every sub-segment, we fake an
1386 ".align ...". This conforms to BSD4.2 brane-damage. We then fake
1387 ".fill 0" because that is the kind of frag that requires least
1388 thought. ".align" frags like to have a following frag since that
1389 makes calculating their intended length trivial. */
1391 #ifndef SUB_SEGMENT_ALIGN
1393 /* The last subsegment gets an aligment corresponding to the alignment
1394 of the section. This allows proper nop-filling at the end of
1395 code-bearing sections. */
1396 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) \
1397 (!(FRCHAIN)->frch_next || (FRCHAIN)->frch_next->frch_seg != (SEG) \
1398 ? get_recorded_alignment (SEG) : 0)
1400 #ifdef BFD_ASSEMBLER
1401 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
1403 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 2
1411 struct frchain *frchainP;
1413 for (frchainP = frchain_root; frchainP; frchainP = frchainP->frch_next)
1417 subseg_set (frchainP->frch_seg, frchainP->frch_subseg);
1419 /* This now gets called even if we had errors. In that case,
1420 any alignment is meaningless, and, moreover, will look weird
1421 if we are generating a listing. */
1424 alignment = SUB_SEGMENT_ALIGN (now_seg, frchainP);
1425 #ifdef BFD_ASSEMBLER
1426 if ((bfd_get_section_flags (now_seg->owner, now_seg) & SEC_MERGE)
1427 && now_seg->entsize)
1429 unsigned int entsize = now_seg->entsize;
1432 while ((entsize & 1) == 0)
1437 if (entalign > alignment)
1438 alignment = entalign;
1443 if (subseg_text_p (now_seg))
1444 frag_align_code (alignment, 0);
1446 frag_align (alignment, 0, 0);
1448 /* frag_align will have left a new frag.
1449 Use this last frag for an empty ".fill".
1451 For this segment ...
1452 Create a last frag. Do not leave a "being filled in frag". */
1453 frag_wane (frag_now);
1454 frag_now->fr_fix = 0;
1455 know (frag_now->fr_next == NULL);
1459 /* Write the object file. */
1462 write_object_file ()
1464 #if ! defined (BFD_ASSEMBLER) || ! defined (WORKING_DOT_WORD)
1465 fragS *fragP; /* Track along all frags. */
1468 /* Do we really want to write it? */
1470 int n_warns, n_errs;
1471 n_warns = had_warnings ();
1472 n_errs = had_errors ();
1473 /* The -Z flag indicates that an object file should be generated,
1474 regardless of warnings and errors. */
1475 if (flag_always_generate_output)
1477 if (n_warns || n_errs)
1478 as_warn (_("%d error%s, %d warning%s, generating bad object file"),
1479 n_errs, n_errs == 1 ? "" : "s",
1480 n_warns, n_warns == 1 ? "" : "s");
1485 as_fatal (_("%d error%s, %d warning%s, no object file generated"),
1486 n_errs, n_errs == 1 ? "" : "s",
1487 n_warns, n_warns == 1 ? "" : "s");
1492 /* Under VMS we try to be compatible with VAX-11 "C". Thus, we call
1493 a routine to check for the definition of the procedure "_main",
1494 and if so -- fix it up so that it can be program entry point. */
1495 vms_check_for_main ();
1496 #endif /* OBJ_VMS */
1498 /* From now on, we don't care about sub-segments. Build one frag chain
1499 for each segment. Linked thru fr_next. */
1501 #ifdef BFD_ASSEMBLER
1502 /* Remove the sections created by gas for its own purposes. */
1507 seclist = &stdoutput->sections;
1510 if (*seclist == reg_section || *seclist == expr_section)
1512 bfd_section_list_remove (stdoutput, seclist);
1513 stdoutput->section_count--;
1516 seclist = &(*seclist)->next;
1519 bfd_map_over_sections (stdoutput, renumber_sections, &i);
1522 bfd_map_over_sections (stdoutput, chain_frchains_together, (char *) 0);
1524 remove_subsegs (frchain_root, SEG_TEXT, &text_frag_root, &text_last_frag);
1525 remove_subsegs (data0_frchainP, SEG_DATA, &data_frag_root, &data_last_frag);
1526 remove_subsegs (bss0_frchainP, SEG_BSS, &bss_frag_root, &bss_last_frag);
1529 /* We have two segments. If user gave -R flag, then we must put the
1530 data frags into the text segment. Do this before relaxing so
1531 we know to take advantage of -R and make shorter addresses. */
1532 #if !defined (OBJ_AOUT) || defined (BFD_ASSEMBLER)
1533 if (flag_readonly_data_in_text)
1535 merge_data_into_text ();
1539 #ifdef BFD_ASSEMBLER
1544 #ifndef WORKING_DOT_WORD
1545 /* We need to reset the markers in the broken word list and
1546 associated frags between calls to relax_segment (via
1547 relax_seg). Since the broken word list is global, we do it
1548 once per round, rather than locally in relax_segment for each
1550 struct broken_word *brokp;
1552 for (brokp = broken_words;
1553 brokp != (struct broken_word *) NULL;
1554 brokp = brokp->next_broken_word)
1558 if (brokp->dispfrag != (fragS *) NULL
1559 && brokp->dispfrag->fr_type == rs_broken_word)
1560 brokp->dispfrag->fr_subtype = 0;
1565 bfd_map_over_sections (stdoutput, relax_seg, &changed);
1570 /* Note - Most ports will use the default value of
1571 TC_FINALIZE_SYMS_BEFORE_SIZE_SEG, which 1. This will force
1572 local symbols to be resolved, removing their frag information.
1573 Some ports however, will not have finished relaxing all of
1574 their frags and will still need the local symbol frag
1575 information. These ports can set
1576 TC_FINALIZE_SYMS_BEFORE_SIZE_SEG to 0. */
1577 finalize_syms = TC_FINALIZE_SYMS_BEFORE_SIZE_SEG;
1579 bfd_map_over_sections (stdoutput, size_seg, (char *) 0);
1581 relax_and_size_all_segments ();
1582 #endif /* BFD_ASSEMBLER */
1584 /* Relaxation has completed. Freeze all syms. */
1587 #ifdef md_post_relax_hook
1591 #ifndef BFD_ASSEMBLER
1592 /* Crawl the symbol chain.
1594 For each symbol whose value depends on a frag, take the address of
1595 that frag and subsume it into the value of the symbol.
1596 After this, there is just one way to lookup a symbol value.
1597 Values are left in their final state for object file emission.
1598 We adjust the values of 'L' local symbols, even if we do
1599 not intend to emit them to the object file, because their values
1600 are needed for fix-ups.
1602 Unless we saw a -L flag, remove all symbols that begin with 'L'
1603 from the symbol chain. (They are still pointed to by the fixes.)
1605 Count the remaining symbols.
1606 Assign a symbol number to each symbol.
1607 Count the number of string-table chars we will emit.
1608 Put this info into the headers as appropriate. */
1609 know (zero_address_frag.fr_address == 0);
1610 string_byte_count = sizeof (string_byte_count);
1612 obj_crawl_symbol_chain (&headers);
1614 if (string_byte_count == sizeof (string_byte_count))
1615 string_byte_count = 0;
1617 H_SET_STRING_SIZE (&headers, string_byte_count);
1619 /* Addresses of frags now reflect addresses we use in the object file.
1620 Symbol values are correct.
1621 Scan the frags, converting any ".org"s and ".align"s to ".fill"s.
1622 Also converting any machine-dependent frags using md_convert_frag(); */
1623 subseg_change (SEG_TEXT, 0);
1625 for (fragP = text_frag_root; fragP; fragP = fragP->fr_next)
1627 /* At this point we have linked all the frags into a single
1628 chain. However, cvt_frag_to_fill may call md_convert_frag
1629 which may call fix_new. We need to ensure that fix_new adds
1630 the fixup to the right section. */
1631 if (fragP == data_frag_root)
1632 subseg_change (SEG_DATA, 0);
1634 cvt_frag_to_fill (&headers, SEG_TEXT, fragP);
1636 /* Some assert macros don't work with # directives mixed in. */
1638 if (!(fragP->fr_next == NULL
1640 || fragP->fr_next == data_frag_root
1642 || ((offsetT) (fragP->fr_next->fr_address - fragP->fr_address)
1643 == (fragP->fr_fix + fragP->fr_offset * fragP->fr_var))))
1647 #endif /* ! BFD_ASSEMBLER */
1649 #ifndef WORKING_DOT_WORD
1651 struct broken_word *lie;
1652 struct broken_word **prevP;
1654 prevP = &broken_words;
1655 for (lie = broken_words; lie; lie = lie->next_broken_word)
1660 subseg_change (lie->seg, lie->subseg);
1661 exp.X_op = O_subtract;
1662 exp.X_add_symbol = lie->add;
1663 exp.X_op_symbol = lie->sub;
1664 exp.X_add_number = lie->addnum;
1665 #ifdef BFD_ASSEMBLER
1666 #ifdef TC_CONS_FIX_NEW
1667 TC_CONS_FIX_NEW (lie->frag,
1668 lie->word_goes_here - lie->frag->fr_literal,
1671 fix_new_exp (lie->frag,
1672 lie->word_goes_here - lie->frag->fr_literal,
1673 2, &exp, 0, BFD_RELOC_16);
1676 #if defined(TC_SPARC) || defined(TC_A29K) || defined(NEED_FX_R_TYPE)
1677 fix_new_exp (lie->frag,
1678 lie->word_goes_here - lie->frag->fr_literal,
1679 2, &exp, 0, NO_RELOC);
1682 fix_new_ns32k_exp (lie->frag,
1683 lie->word_goes_here - lie->frag->fr_literal,
1684 2, &exp, 0, 0, 2, 0, 0);
1686 fix_new_exp (lie->frag,
1687 lie->word_goes_here - lie->frag->fr_literal,
1689 #endif /* TC_NS32K */
1690 #endif /* TC_SPARC|TC_A29K|NEED_FX_R_TYPE */
1691 #endif /* BFD_ASSEMBLER */
1692 *prevP = lie->next_broken_word;
1695 prevP = &(lie->next_broken_word);
1697 for (lie = broken_words; lie;)
1699 struct broken_word *untruth;
1701 addressT table_addr;
1702 addressT from_addr, to_addr;
1705 subseg_change (lie->seg, lie->subseg);
1706 fragP = lie->dispfrag;
1708 /* Find out how many broken_words go here. */
1711 untruth && untruth->dispfrag == fragP;
1712 untruth = untruth->next_broken_word)
1713 if (untruth->added == 1)
1716 table_ptr = lie->dispfrag->fr_opcode;
1717 table_addr = (lie->dispfrag->fr_address
1718 + (table_ptr - lie->dispfrag->fr_literal));
1719 /* Create the jump around the long jumps. This is a short
1720 jump from table_ptr+0 to table_ptr+n*long_jump_size. */
1721 from_addr = table_addr;
1722 to_addr = table_addr + md_short_jump_size + n * md_long_jump_size;
1723 md_create_short_jump (table_ptr, from_addr, to_addr, lie->dispfrag,
1725 table_ptr += md_short_jump_size;
1726 table_addr += md_short_jump_size;
1729 lie && lie->dispfrag == fragP;
1730 m++, lie = lie->next_broken_word)
1732 if (lie->added == 2)
1734 /* Patch the jump table. */
1735 /* This is the offset from ??? to table_ptr+0. */
1736 to_addr = table_addr - S_GET_VALUE (lie->sub);
1737 #ifdef TC_CHECK_ADJUSTED_BROKEN_DOT_WORD
1738 TC_CHECK_ADJUSTED_BROKEN_DOT_WORD (to_addr, lie);
1740 md_number_to_chars (lie->word_goes_here, to_addr, 2);
1741 for (untruth = lie->next_broken_word;
1742 untruth && untruth->dispfrag == fragP;
1743 untruth = untruth->next_broken_word)
1745 if (untruth->use_jump == lie)
1746 md_number_to_chars (untruth->word_goes_here, to_addr, 2);
1749 /* Install the long jump. */
1750 /* This is a long jump from table_ptr+0 to the final target. */
1751 from_addr = table_addr;
1752 to_addr = S_GET_VALUE (lie->add) + lie->addnum;
1753 md_create_long_jump (table_ptr, from_addr, to_addr, lie->dispfrag,
1755 table_ptr += md_long_jump_size;
1756 table_addr += md_long_jump_size;
1760 #endif /* not WORKING_DOT_WORD */
1762 #ifndef BFD_ASSEMBLER
1765 char *the_object_file;
1766 long object_file_size;
1767 /* Scan every FixS performing fixups. We had to wait until now to
1768 do this because md_convert_frag() may have made some fixSs. */
1771 subseg_change (SEG_TEXT, 0);
1772 trsize = md_reloc_size * fixup_segment (text_fix_root, SEG_TEXT);
1773 subseg_change (SEG_DATA, 0);
1774 drsize = md_reloc_size * fixup_segment (data_fix_root, SEG_DATA);
1775 H_SET_RELOCATION_SIZE (&headers, trsize, drsize);
1777 /* FIXME: Move this stuff into the pre-write-hook. */
1778 H_SET_MAGIC_NUMBER (&headers, magic_number_for_object_file);
1779 H_SET_ENTRY_POINT (&headers, 0);
1781 obj_pre_write_hook (&headers); /* Extra coff stuff. */
1783 object_file_size = H_GET_FILE_SIZE (&headers);
1784 next_object_file_charP = the_object_file = xmalloc (object_file_size);
1786 output_file_create (out_file_name);
1788 obj_header_append (&next_object_file_charP, &headers);
1790 know ((next_object_file_charP - the_object_file)
1791 == H_GET_HEADER_SIZE (&headers));
1794 for (fragP = text_frag_root; fragP; fragP = fragP->fr_next)
1796 register long count;
1797 register char *fill_literal;
1798 register long fill_size;
1801 know (fragP->fr_type == rs_fill);
1802 append (&next_object_file_charP, fragP->fr_literal,
1803 (unsigned long) fragP->fr_fix);
1804 fill_literal = fragP->fr_literal + fragP->fr_fix;
1805 fill_size = fragP->fr_var;
1806 know (fragP->fr_offset >= 0);
1808 for (count = fragP->fr_offset; count; count--)
1809 append (&next_object_file_charP, fill_literal,
1810 (unsigned long) fill_size);
1813 know ((next_object_file_charP - the_object_file)
1814 == (H_GET_HEADER_SIZE (&headers)
1815 + H_GET_TEXT_SIZE (&headers)
1816 + H_GET_DATA_SIZE (&headers)));
1818 /* Emit relocations. */
1819 obj_emit_relocations (&next_object_file_charP, text_fix_root,
1820 (relax_addressT) 0);
1821 know ((next_object_file_charP - the_object_file)
1822 == (H_GET_HEADER_SIZE (&headers)
1823 + H_GET_TEXT_SIZE (&headers)
1824 + H_GET_DATA_SIZE (&headers)
1825 + H_GET_TEXT_RELOCATION_SIZE (&headers)));
1827 /* Make addresses in data relocation directives relative to beginning of
1828 first data fragment, not end of last text fragment: alignment of the
1829 start of the data segment may place a gap between the segments. */
1830 obj_emit_relocations (&next_object_file_charP, data_fix_root,
1831 data0_frchainP->frch_root->fr_address);
1833 obj_emit_relocations (&next_object_file_charP, data_fix_root,
1834 text_last_frag->fr_address);
1835 #endif /* TC_I960 */
1837 know ((next_object_file_charP - the_object_file)
1838 == (H_GET_HEADER_SIZE (&headers)
1839 + H_GET_TEXT_SIZE (&headers)
1840 + H_GET_DATA_SIZE (&headers)
1841 + H_GET_TEXT_RELOCATION_SIZE (&headers)
1842 + H_GET_DATA_RELOCATION_SIZE (&headers)));
1844 /* Emit line number entries. */
1845 OBJ_EMIT_LINENO (&next_object_file_charP, lineno_rootP, the_object_file);
1846 know ((next_object_file_charP - the_object_file)
1847 == (H_GET_HEADER_SIZE (&headers)
1848 + H_GET_TEXT_SIZE (&headers)
1849 + H_GET_DATA_SIZE (&headers)
1850 + H_GET_TEXT_RELOCATION_SIZE (&headers)
1851 + H_GET_DATA_RELOCATION_SIZE (&headers)
1852 + H_GET_LINENO_SIZE (&headers)));
1855 obj_emit_symbols (&next_object_file_charP, symbol_rootP);
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 + H_GET_SYMBOL_TABLE_SIZE (&headers)));
1866 if (string_byte_count > 0)
1867 obj_emit_strings (&next_object_file_charP);
1870 bfd_seek (stdoutput, (file_ptr) 0, 0);
1871 bfd_bwrite (the_object_file, (bfd_size_type) object_file_size, stdoutput);
1874 /* Write the data to the file. */
1875 output_file_append (the_object_file, object_file_size, out_file_name);
1876 free (the_object_file);
1880 /* Now do the VMS-dependent part of writing the object file. */
1881 vms_write_object_file (H_GET_TEXT_SIZE (&headers),
1882 H_GET_DATA_SIZE (&headers),
1883 H_GET_BSS_SIZE (&headers),
1884 text_frag_root, data_frag_root);
1885 #endif /* OBJ_VMS */
1886 #else /* BFD_ASSEMBLER */
1888 /* Resolve symbol values. This needs to be done before processing
1894 for (symp = symbol_rootP; symp; symp = symbol_next (symp))
1895 resolve_symbol_value (symp);
1897 resolve_local_symbol_values ();
1901 #ifdef tc_frob_file_before_adjust
1902 tc_frob_file_before_adjust ();
1904 #ifdef obj_frob_file_before_adjust
1905 obj_frob_file_before_adjust ();
1908 bfd_map_over_sections (stdoutput, adjust_reloc_syms, (char *) 0);
1910 #ifdef tc_frob_file_before_fix
1911 tc_frob_file_before_fix ();
1913 #ifdef obj_frob_file_before_fix
1914 obj_frob_file_before_fix ();
1917 bfd_map_over_sections (stdoutput, fix_segment, (char *) 0);
1919 /* Set up symbol table, and write it out. */
1924 for (symp = symbol_rootP; symp; symp = symbol_next (symp))
1929 if (symbol_mri_common_p (symp))
1931 if (S_IS_EXTERNAL (symp))
1932 as_bad (_("%s: global symbols not supported in common sections"),
1934 symbol_remove (symp, &symbol_rootP, &symbol_lastP);
1938 name = S_GET_NAME (symp);
1942 decode_local_label_name ((char *) S_GET_NAME (symp));
1943 /* They only differ if `name' is a fb or dollar local
1945 if (name2 != name && ! S_IS_DEFINED (symp))
1946 as_bad (_("local label `%s' is not defined"), name2);
1949 /* Do it again, because adjust_reloc_syms might introduce
1950 more symbols. They'll probably only be section symbols,
1951 but they'll still need to have the values computed. */
1952 resolve_symbol_value (symp);
1954 /* Skip symbols which were equated to undefined or common
1956 if (symbol_equated_reloc_p (symp))
1958 symbol_remove (symp, &symbol_rootP, &symbol_lastP);
1962 /* So far, common symbols have been treated like undefined symbols.
1963 Put them in the common section now. */
1964 if (S_IS_DEFINED (symp) == 0
1965 && S_GET_VALUE (symp) != 0)
1966 S_SET_SEGMENT (symp, bfd_com_section_ptr);
1968 printf ("symbol `%s'\n\t@%x: value=%d flags=%x seg=%s\n",
1969 S_GET_NAME (symp), symp,
1971 symbol_get_bfdsym (symp)->flags,
1972 segment_name (S_GET_SEGMENT (symp)));
1975 #ifdef obj_frob_symbol
1976 obj_frob_symbol (symp, punt);
1978 #ifdef tc_frob_symbol
1979 if (! punt || symbol_used_in_reloc_p (symp))
1980 tc_frob_symbol (symp, punt);
1983 /* If we don't want to keep this symbol, splice it out of
1984 the chain now. If EMIT_SECTION_SYMBOLS is 0, we never
1985 want section symbols. Otherwise, we skip local symbols
1986 and symbols that the frob_symbol macros told us to punt,
1987 but we keep such symbols if they are used in relocs. */
1988 if (symp == abs_section_sym
1989 || (! EMIT_SECTION_SYMBOLS
1990 && symbol_section_p (symp))
1991 /* Note that S_IS_EXTERN and S_IS_LOCAL are not always
1992 opposites. Sometimes the former checks flags and the
1993 latter examines the name... */
1994 || (!S_IS_EXTERN (symp)
1995 && (punt || S_IS_LOCAL (symp))
1996 && ! symbol_used_in_reloc_p (symp)))
1998 symbol_remove (symp, &symbol_rootP, &symbol_lastP);
2000 /* After symbol_remove, symbol_next(symp) still returns
2001 the one that came after it in the chain. So we don't
2002 need to do any extra cleanup work here. */
2006 /* Make sure we really got a value for the symbol. */
2007 if (! symbol_resolved_p (symp))
2009 as_bad (_("can't resolve value for symbol `%s'"),
2011 symbol_mark_resolved (symp);
2014 /* Set the value into the BFD symbol. Up til now the value
2015 has only been kept in the gas symbolS struct. */
2016 symbol_get_bfdsym (symp)->value = S_GET_VALUE (symp);
2022 /* Now do any format-specific adjustments to the symbol table, such
2023 as adding file symbols. */
2024 #ifdef tc_adjust_symtab
2025 tc_adjust_symtab ();
2027 #ifdef obj_adjust_symtab
2028 obj_adjust_symtab ();
2031 /* Now that all the sizes are known, and contents correct, we can
2032 start writing to the file. */
2035 /* If *_frob_file changes the symbol value at this point, it is
2036 responsible for moving the changed value into symp->bsym->value
2037 as well. Hopefully all symbol value changing can be done in
2042 #ifdef obj_frob_file
2046 bfd_map_over_sections (stdoutput, write_relocs, (char *) 0);
2048 #ifdef tc_frob_file_after_relocs
2049 tc_frob_file_after_relocs ();
2051 #ifdef obj_frob_file_after_relocs
2052 obj_frob_file_after_relocs ();
2055 bfd_map_over_sections (stdoutput, write_contents, (char *) 0);
2056 #endif /* BFD_ASSEMBLER */
2060 #ifdef TC_GENERIC_RELAX_TABLE
2062 /* Relax a fragment by scanning TC_GENERIC_RELAX_TABLE. */
2065 relax_frag (segment, fragP, stretch)
2070 const relax_typeS *this_type;
2071 const relax_typeS *start_type;
2072 relax_substateT next_state;
2073 relax_substateT this_state;
2079 const relax_typeS *table;
2081 target = fragP->fr_offset;
2082 address = fragP->fr_address;
2083 table = TC_GENERIC_RELAX_TABLE;
2084 this_state = fragP->fr_subtype;
2085 start_type = this_type = table + this_state;
2086 symbolP = fragP->fr_symbol;
2092 sym_frag = symbol_get_frag (symbolP);
2094 #ifndef DIFF_EXPR_OK
2095 #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER)
2096 know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE)
2097 || (S_GET_SEGMENT (symbolP) == SEG_DATA)
2098 || (S_GET_SEGMENT (symbolP) == SEG_BSS)
2099 || (S_GET_SEGMENT (symbolP) == SEG_TEXT));
2101 know (sym_frag != NULL);
2103 know (S_GET_SEGMENT (symbolP) != absolute_section
2104 || sym_frag == &zero_address_frag);
2105 target += S_GET_VALUE (symbolP);
2107 /* If frag has yet to be reached on this pass,
2108 assume it will move by STRETCH just as we did.
2109 If this is not so, it will be because some frag
2110 between grows, and that will force another pass. */
2113 && sym_frag->relax_marker != fragP->relax_marker
2114 && S_GET_SEGMENT (symbolP) == segment)
2120 aim = target - address - fragP->fr_fix;
2121 #ifdef TC_PCREL_ADJUST
2122 /* Currently only the ns32k family needs this. */
2123 aim += TC_PCREL_ADJUST (fragP);
2125 /* This machine doesn't want to use pcrel_adjust.
2126 In that case, pcrel_adjust should be zero. */
2128 assert (fragP->fr_targ.ns32k.pcrel_adjust == 0);
2131 #ifdef md_prepare_relax_scan /* formerly called M68K_AIM_KLUDGE */
2132 md_prepare_relax_scan (fragP, address, aim, this_state, this_type);
2137 /* Look backwards. */
2138 for (next_state = this_type->rlx_more; next_state;)
2139 if (aim >= this_type->rlx_backward)
2143 /* Grow to next state. */
2144 this_state = next_state;
2145 this_type = table + this_state;
2146 next_state = this_type->rlx_more;
2151 /* Look forwards. */
2152 for (next_state = this_type->rlx_more; next_state;)
2153 if (aim <= this_type->rlx_forward)
2157 /* Grow to next state. */
2158 this_state = next_state;
2159 this_type = table + this_state;
2160 next_state = this_type->rlx_more;
2164 growth = this_type->rlx_length - start_type->rlx_length;
2166 fragP->fr_subtype = this_state;
2170 #endif /* defined (TC_GENERIC_RELAX_TABLE) */
2172 /* Relax_align. Advance location counter to next address that has 'alignment'
2173 lowest order bits all 0s, return size of adjustment made. */
2174 static relax_addressT
2175 relax_align (address, alignment)
2176 register relax_addressT address; /* Address now. */
2177 register int alignment; /* Alignment (binary). */
2179 relax_addressT mask;
2180 relax_addressT new_address;
2182 mask = ~((~0) << alignment);
2183 new_address = (address + mask) & (~mask);
2184 #ifdef LINKER_RELAXING_SHRINKS_ONLY
2186 /* We must provide lots of padding, so the linker can discard it
2187 when needed. The linker will not add extra space, ever. */
2188 new_address += (1 << alignment);
2190 return (new_address - address);
2193 /* Now we have a segment, not a crowd of sub-segments, we can make
2198 After this, all frags in this segment have addresses that are correct
2199 within the segment. Since segments live in different file addresses,
2200 these frag addresses may not be the same as final object-file
2204 relax_segment (segment_frag_root, segment)
2205 struct frag *segment_frag_root;
2208 register struct frag *fragP;
2209 register relax_addressT address;
2212 #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER)
2213 know (segment == SEG_DATA || segment == SEG_TEXT || segment == SEG_BSS);
2215 /* In case md_estimate_size_before_relax() wants to make fixSs. */
2216 subseg_change (segment, 0);
2218 /* For each frag in segment: count and store (a 1st guess of)
2221 for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next)
2223 fragP->relax_marker = 0;
2224 fragP->fr_address = address;
2225 address += fragP->fr_fix;
2227 switch (fragP->fr_type)
2230 address += fragP->fr_offset * fragP->fr_var;
2237 addressT offset = relax_align (address, (int) fragP->fr_offset);
2239 if (fragP->fr_subtype != 0 && offset > fragP->fr_subtype)
2242 if (offset % fragP->fr_var != 0)
2244 as_bad_where (fragP->fr_file, fragP->fr_line,
2245 _("alignment padding (%lu bytes) not a multiple of %ld"),
2246 (unsigned long) offset, (long) fragP->fr_var);
2247 offset -= (offset % fragP->fr_var);
2256 /* Assume .org is nugatory. It will grow with 1st relax. */
2259 case rs_machine_dependent:
2260 /* If fr_symbol is an expression, this call to
2261 resolve_symbol_value sets up the correct segment, which will
2262 likely be needed in md_estimate_size_before_relax. */
2263 if (fragP->fr_symbol)
2264 resolve_symbol_value (fragP->fr_symbol);
2266 address += md_estimate_size_before_relax (fragP, segment);
2269 #ifndef WORKING_DOT_WORD
2270 /* Broken words don't concern us yet. */
2271 case rs_broken_word:
2276 /* Initial guess is always 1; doing otherwise can result in
2277 stable solutions that are larger than the minimum. */
2278 address += fragP->fr_offset = 1;
2282 address += eh_frame_estimate_size_before_relax (fragP);
2286 address += dwarf2dbg_estimate_size_before_relax (fragP);
2290 BAD_CASE (fragP->fr_type);
2297 long stretch; /* May be any size, 0 or negative. */
2298 /* Cumulative number of addresses we have relaxed this pass.
2299 We may have relaxed more than one address. */
2300 int stretched; /* Have we stretched on this pass? */
2301 /* This is 'cuz stretch may be zero, when, in fact some piece of code
2302 grew, and another shrank. If a branch instruction doesn't fit anymore,
2303 we could be scrod. */
2310 for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next)
2313 addressT was_address;
2317 fragP->relax_marker ^= 1;
2318 was_address = fragP->fr_address;
2319 address = fragP->fr_address += stretch;
2320 symbolP = fragP->fr_symbol;
2321 offset = fragP->fr_offset;
2323 switch (fragP->fr_type)
2325 case rs_fill: /* .fill never relaxes. */
2329 #ifndef WORKING_DOT_WORD
2330 /* JF: This is RMS's idea. I do *NOT* want to be blamed
2331 for it I do not want to write it. I do not want to have
2332 anything to do with it. This is not the proper way to
2333 implement this misfeature. */
2334 case rs_broken_word:
2336 struct broken_word *lie;
2337 struct broken_word *untruth;
2339 /* Yes this is ugly (storing the broken_word pointer
2340 in the symbol slot). Still, this whole chunk of
2341 code is ugly, and I don't feel like doing anything
2342 about it. Think of it as stubbornness in action. */
2344 for (lie = (struct broken_word *) (fragP->fr_symbol);
2345 lie && lie->dispfrag == fragP;
2346 lie = lie->next_broken_word)
2352 offset = (S_GET_VALUE (lie->add)
2354 - S_GET_VALUE (lie->sub));
2355 if (offset <= -32768 || offset >= 32767)
2357 if (flag_warn_displacement)
2360 sprint_value (buf, (addressT) lie->addnum);
2361 as_warn_where (fragP->fr_file, fragP->fr_line,
2362 _(".word %s-%s+%s didn't fit"),
2363 S_GET_NAME (lie->add),
2364 S_GET_NAME (lie->sub),
2368 if (fragP->fr_subtype == 0)
2370 fragP->fr_subtype++;
2371 growth += md_short_jump_size;
2373 for (untruth = lie->next_broken_word;
2374 untruth && untruth->dispfrag == lie->dispfrag;
2375 untruth = untruth->next_broken_word)
2376 if ((symbol_get_frag (untruth->add)
2377 == symbol_get_frag (lie->add))
2378 && (S_GET_VALUE (untruth->add)
2379 == S_GET_VALUE (lie->add)))
2382 untruth->use_jump = lie;
2384 growth += md_long_jump_size;
2389 } /* case rs_broken_word */
2395 addressT oldoff, newoff;
2397 oldoff = relax_align (was_address + fragP->fr_fix,
2399 newoff = relax_align (address + fragP->fr_fix,
2402 if (fragP->fr_subtype != 0)
2404 if (oldoff > fragP->fr_subtype)
2406 if (newoff > fragP->fr_subtype)
2410 growth = newoff - oldoff;
2416 addressT target = offset;
2421 #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER)
2422 know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE)
2423 || (S_GET_SEGMENT (symbolP) == SEG_DATA)
2424 || (S_GET_SEGMENT (symbolP) == SEG_TEXT)
2425 || S_GET_SEGMENT (symbolP) == SEG_BSS);
2426 know (symbolP->sy_frag);
2427 know (!(S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE)
2428 || (symbolP->sy_frag == &zero_address_frag));
2430 /* Convert from an actual address to an octet offset
2431 into the section. Here it is assumed that the
2432 section's VMA is zero, and can omit subtracting it
2433 from the symbol's value to get the address offset. */
2434 know (S_GET_SECTION (symbolP)->vma == 0);
2435 target += S_GET_VALUE (symbolP) * OCTETS_PER_BYTE;
2438 know (fragP->fr_next);
2439 after = fragP->fr_next->fr_address;
2440 growth = target - after;
2443 /* Growth may be negative, but variable part of frag
2444 cannot have fewer than 0 chars. That is, we can't
2446 as_bad_where (fragP->fr_file, fragP->fr_line,
2447 _("attempt to .org backwards"));
2449 /* We've issued an error message. Change the
2450 frag to avoid cascading errors. */
2451 fragP->fr_type = rs_align;
2452 fragP->fr_subtype = 0;
2453 fragP->fr_offset = 0;
2454 fragP->fr_fix = after - address;
2458 /* This is an absolute growth factor */
2469 amount = S_GET_VALUE (symbolP);
2470 if (S_GET_SEGMENT (symbolP) != absolute_section
2471 || S_IS_COMMON (symbolP)
2472 || ! S_IS_DEFINED (symbolP))
2474 as_bad_where (fragP->fr_file, fragP->fr_line,
2475 _(".space specifies non-absolute value"));
2476 /* Prevent repeat of this error message. */
2477 fragP->fr_symbol = 0;
2479 else if (amount < 0)
2481 as_warn_where (fragP->fr_file, fragP->fr_line,
2482 _(".space or .fill with negative value, ignored"));
2483 fragP->fr_symbol = 0;
2486 growth = (was_address + fragP->fr_fix + amount
2487 - fragP->fr_next->fr_address);
2491 case rs_machine_dependent:
2492 #ifdef md_relax_frag
2493 growth = md_relax_frag (segment, fragP, stretch);
2495 #ifdef TC_GENERIC_RELAX_TABLE
2496 /* The default way to relax a frag is to look through
2497 TC_GENERIC_RELAX_TABLE. */
2498 growth = relax_frag (segment, fragP, stretch);
2499 #endif /* TC_GENERIC_RELAX_TABLE */
2508 value = resolve_symbol_value (fragP->fr_symbol);
2509 size = sizeof_leb128 (value, fragP->fr_subtype);
2510 growth = size - fragP->fr_offset;
2511 fragP->fr_offset = size;
2516 growth = eh_frame_relax_frag (fragP);
2520 growth = dwarf2dbg_relax_frag (fragP);
2524 BAD_CASE (fragP->fr_type);
2532 } /* For each frag in the segment. */
2534 while (stretched); /* Until nothing further to relax. */
2538 for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next)
2539 if (fragP->last_fr_address != fragP->fr_address)
2541 fragP->last_fr_address = fragP->fr_address;
2547 #if defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS))
2551 Go through all the fixS's in a segment and see which ones can be
2552 handled now. (These consist of fixS where we have since discovered
2553 the value of a symbol, or the address of the frag involved.)
2554 For each one, call md_apply_fix3 to put the fix into the frag data.
2556 Result is a count of how many relocation structs will be needed to
2557 handle the remaining fixS's that we couldn't completely handle here.
2558 These will be output later by emit_relocations(). */
2561 fixup_segment (fixP, this_segment)
2565 long seg_reloc_count = 0;
2568 segT add_symbol_segment = absolute_section;
2570 if (fixP != NULL && abs_section_sym == NULL)
2572 #ifndef BFD_ASSEMBLER
2573 abs_section_sym = &abs_symbol;
2575 abs_section_sym = section_symbol (absolute_section);
2579 /* If the linker is doing the relaxing, we must not do any fixups.
2581 Well, strictly speaking that's not true -- we could do any that
2582 are PC-relative and don't cross regions that could change size.
2583 And for the i960 we might be able to turn callx/callj into bal
2584 anyways in cases where we know the maximum displacement. */
2585 if (linkrelax && TC_LINKRELAX_FIXUP (this_segment))
2587 for (; fixP; fixP = fixP->fx_next)
2590 if (fixP->fx_addsy == NULL)
2592 /* There was no symbol required by this relocation.
2593 However, BFD doesn't really handle relocations
2594 without symbols well. So fake up a local symbol in
2595 the absolute section. */
2596 fixP->fx_addsy = abs_section_sym;
2598 symbol_mark_used_in_reloc (fixP->fx_addsy);
2599 if (fixP->fx_subsy != NULL)
2600 symbol_mark_used_in_reloc (fixP->fx_subsy);
2603 TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count);
2604 return seg_reloc_count;
2607 for (; fixP; fixP = fixP->fx_next)
2610 fprintf (stderr, "\nprocessing fixup:\n");
2614 fragP = fixP->fx_frag;
2616 #ifdef TC_VALIDATE_FIX
2617 TC_VALIDATE_FIX (fixP, this_segment, skip);
2619 add_number = fixP->fx_offset;
2621 if (fixP->fx_addsy != NULL
2622 && symbol_mri_common_p (fixP->fx_addsy))
2624 know (fixP->fx_addsy->sy_value.X_op == O_symbol);
2625 add_number += S_GET_VALUE (fixP->fx_addsy);
2626 fixP->fx_offset = add_number;
2628 = symbol_get_value_expression (fixP->fx_addsy)->X_add_symbol;
2631 if (fixP->fx_addsy != NULL)
2632 add_symbol_segment = S_GET_SEGMENT (fixP->fx_addsy);
2634 if (fixP->fx_subsy != NULL)
2636 segT sub_symbol_segment;
2637 resolve_symbol_value (fixP->fx_subsy);
2638 sub_symbol_segment = S_GET_SEGMENT (fixP->fx_subsy);
2639 if (fixP->fx_addsy != NULL
2640 && sub_symbol_segment == add_symbol_segment
2641 && !TC_FORCE_RELOCATION_SUB_SAME (fixP, add_symbol_segment))
2643 add_number += S_GET_VALUE (fixP->fx_addsy);
2644 add_number -= S_GET_VALUE (fixP->fx_subsy);
2645 fixP->fx_offset = add_number;
2646 /* If the back-end code has selected a pc-relative
2647 reloc, adjust the value to be pc-relative. */
2650 /* See the comment below about 68k weirdness. */
2654 add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment);
2655 fixP->fx_addsy = NULL;
2656 fixP->fx_subsy = NULL;
2659 else if (sub_symbol_segment == absolute_section
2660 && !TC_FORCE_RELOCATION_SUB_ABS (fixP))
2662 add_number -= S_GET_VALUE (fixP->fx_subsy);
2663 fixP->fx_offset = add_number;
2664 fixP->fx_subsy = NULL;
2666 else if (sub_symbol_segment == this_segment
2667 && !TC_FORCE_RELOCATION_SUB_LOCAL (fixP))
2669 add_number -= S_GET_VALUE (fixP->fx_subsy);
2670 fixP->fx_offset = (add_number + fixP->fx_dot_value
2671 + fixP->fx_frag->fr_address);
2673 /* Make it pc-relative. If the back-end code has not
2674 selected a pc-relative reloc, cancel the adjustment
2675 we do later on all pc-relative relocs. */
2678 /* Do this for m68k even if it's already described
2679 as pc-relative. On the m68k, an operand of
2680 "pc@(foo-.-2)" should address "foo" in a
2681 pc-relative mode. */
2685 add_number += MD_PCREL_FROM_SECTION (fixP, this_segment);
2686 fixP->fx_subsy = NULL;
2689 else if (!TC_VALIDATE_FIX_SUB (fixP))
2691 as_bad_where (fixP->fx_file, fixP->fx_line,
2692 _("can't resolve `%s' {%s section} - `%s' {%s section}"),
2693 fixP->fx_addsy ? S_GET_NAME (fixP->fx_addsy) : "0",
2694 segment_name (add_symbol_segment),
2695 S_GET_NAME (fixP->fx_subsy),
2696 segment_name (sub_symbol_segment));
2702 if (add_symbol_segment == this_segment
2703 && !TC_FORCE_RELOCATION_LOCAL (fixP))
2705 /* This fixup was made when the symbol's segment was
2706 SEG_UNKNOWN, but it is now in the local segment.
2707 So we know how to do the address without relocation. */
2708 add_number += S_GET_VALUE (fixP->fx_addsy);
2709 fixP->fx_offset = add_number;
2711 add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment);
2712 fixP->fx_addsy = NULL;
2715 else if (add_symbol_segment == absolute_section
2716 && !TC_FORCE_RELOCATION_ABS (fixP))
2718 add_number += S_GET_VALUE (fixP->fx_addsy);
2719 fixP->fx_offset = add_number;
2720 fixP->fx_addsy = NULL;
2722 else if (add_symbol_segment != undefined_section
2723 #ifdef BFD_ASSEMBLER
2724 && ! bfd_is_com_section (add_symbol_segment)
2726 && MD_APPLY_SYM_VALUE (fixP))
2727 add_number += S_GET_VALUE (fixP->fx_addsy);
2732 add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment);
2733 if (!fixP->fx_done && fixP->fx_addsy == NULL)
2735 /* There was no symbol required by this relocation.
2736 However, BFD doesn't really handle relocations
2737 without symbols well. So fake up a local symbol in
2738 the absolute section. */
2739 fixP->fx_addsy = abs_section_sym;
2744 md_apply_fix3 (fixP, &add_number, this_segment);
2749 if (fixP->fx_addsy == NULL)
2750 fixP->fx_addsy = abs_section_sym;
2751 symbol_mark_used_in_reloc (fixP->fx_addsy);
2752 if (fixP->fx_subsy != NULL)
2753 symbol_mark_used_in_reloc (fixP->fx_subsy);
2756 if (!fixP->fx_bit_fixP && !fixP->fx_no_overflow && fixP->fx_size != 0)
2758 if (fixP->fx_size < sizeof (valueT))
2763 mask--; /* Set all bits to one. */
2764 mask <<= fixP->fx_size * 8 - (fixP->fx_signed ? 1 : 0);
2765 if ((add_number & mask) != 0 && (add_number & mask) != mask)
2767 char buf[50], buf2[50];
2768 sprint_value (buf, fragP->fr_address + fixP->fx_where);
2769 if (add_number > 1000)
2770 sprint_value (buf2, add_number);
2772 sprintf (buf2, "%ld", (long) add_number);
2773 as_bad_where (fixP->fx_file, fixP->fx_line,
2774 _("value of %s too large for field of %d bytes at %s"),
2775 buf2, fixP->fx_size, buf);
2776 } /* Generic error checking. */
2778 #ifdef WARN_SIGNED_OVERFLOW_WORD
2779 /* Warn if a .word value is too large when treated as a signed
2780 number. We already know it is not too negative. This is to
2781 catch over-large switches generated by gcc on the 68k. */
2782 if (!flag_signed_overflow_ok
2783 && fixP->fx_size == 2
2784 && add_number > 0x7fff)
2785 as_bad_where (fixP->fx_file, fixP->fx_line,
2786 _("signed .word overflow; switch may be too large; %ld at 0x%lx"),
2788 (long) (fragP->fr_address + fixP->fx_where));
2790 } /* Not a bit fix. */
2792 #ifdef TC_VALIDATE_FIX
2793 skip: ATTRIBUTE_UNUSED_LABEL
2797 fprintf (stderr, "result:\n");
2800 } /* For each fixS in this segment. */
2802 TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count);
2803 return seg_reloc_count;
2806 #endif /* defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS)) */
2809 number_to_chars_bigendian (buf, val, n)
2818 buf[n] = val & 0xff;
2824 number_to_chars_littleendian (buf, val, n)
2833 *buf++ = val & 0xff;
2839 write_print_statistics (file)
2842 fprintf (file, "fixups: %d\n", n_fixups);
2845 /* For debugging. */
2846 extern int indent_level;
2853 fprintf (stderr, "fix %lx %s:%d", (long) fixp, fixp->fx_file, fixp->fx_line);
2855 fprintf (stderr, " pcrel");
2856 if (fixp->fx_pcrel_adjust)
2857 fprintf (stderr, " pcrel_adjust=%d", fixp->fx_pcrel_adjust);
2858 if (fixp->fx_im_disp)
2861 fprintf (stderr, " im_disp=%d", fixp->fx_im_disp);
2863 fprintf (stderr, " im_disp");
2867 fprintf (stderr, " tcbit");
2869 fprintf (stderr, " done");
2870 fprintf (stderr, "\n size=%d frag=%lx where=%ld offset=%lx addnumber=%lx",
2871 fixp->fx_size, (long) fixp->fx_frag, (long) fixp->fx_where,
2872 (long) fixp->fx_offset, (long) fixp->fx_addnumber);
2873 #ifdef BFD_ASSEMBLER
2874 fprintf (stderr, "\n %s (%d)", bfd_get_reloc_code_name (fixp->fx_r_type),
2877 #ifdef NEED_FX_R_TYPE
2878 fprintf (stderr, " r_type=%d", fixp->fx_r_type);
2883 fprintf (stderr, "\n +<");
2884 print_symbol_value_1 (stderr, fixp->fx_addsy);
2885 fprintf (stderr, ">");
2889 fprintf (stderr, "\n -<");
2890 print_symbol_value_1 (stderr, fixp->fx_subsy);
2891 fprintf (stderr, ">");
2893 fprintf (stderr, "\n");
2894 #ifdef TC_FIX_DATA_PRINT
2895 TC_FIX_DATA_PRINT (stderr, fixp);