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)
1021 bfd_reloc_status_type s;
1031 /* If this is an undefined symbol which was equated to another
1032 symbol, then generate the reloc against the latter symbol
1033 rather than the former. */
1034 sym = fixp->fx_addsy;
1035 while (symbol_equated_reloc_p (sym))
1039 /* We must avoid looping, as that can occur with a badly
1041 n = symbol_get_value_expression (sym)->X_add_symbol;
1044 fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number;
1047 fixp->fx_addsy = sym;
1049 reloc = tc_gen_reloc (sec, fixp);
1051 for (j = 0; reloc[j]; j++)
1053 relocs[i++] = reloc[j];
1056 data = fixp->fx_frag->fr_literal + fixp->fx_where;
1057 if (fixp->fx_where + fixp->fx_size
1058 > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset)
1059 as_bad_where (fixp->fx_file, fixp->fx_line,
1060 _("internal error: fixup not contained within frag"));
1061 for (j = 0; reloc[j]; j++)
1063 s = bfd_install_relocation (stdoutput, reloc[j],
1064 fixp->fx_frag->fr_literal,
1065 fixp->fx_frag->fr_address,
1071 case bfd_reloc_overflow:
1072 as_bad_where (fixp->fx_file, fixp->fx_line,
1073 _("relocation overflow"));
1075 case bfd_reloc_outofrange:
1076 as_bad_where (fixp->fx_file, fixp->fx_line,
1077 _("relocation out of range"));
1080 as_fatal (_("%s:%u: bad return from bfd_install_relocation: %x"),
1081 fixp->fx_file, fixp->fx_line, s);
1092 sympp = bfd_get_outsymbols (stdoutput);
1093 nsyms = bfd_get_symcount (stdoutput);
1094 for (i = 0; i < n; i++)
1095 if (((*relocs[i]->sym_ptr_ptr)->flags & BSF_SECTION_SYM) == 0)
1097 for (j = 0; j < nsyms; j++)
1098 if (sympp[j] == *relocs[i]->sym_ptr_ptr)
1107 bfd_set_reloc (stdoutput, sec, relocs, n);
1109 bfd_set_section_flags (abfd, sec,
1110 (bfd_get_section_flags (abfd, sec)
1111 & (flagword) ~SEC_RELOC));
1113 #ifdef SET_SECTION_RELOCS
1114 SET_SECTION_RELOCS (sec, relocs, n);
1122 fprintf (stderr, "relocs for sec %s\n", sec->name);
1123 for (i = 0; i < n; i++)
1126 s = *r->sym_ptr_ptr;
1127 fprintf (stderr, " reloc %2d @%08x off %4x : sym %-10s addend %x\n",
1128 i, r, r->address, s->name, r->addend);
1135 write_contents (abfd, sec, xxx)
1136 bfd *abfd ATTRIBUTE_UNUSED;
1138 PTR xxx ATTRIBUTE_UNUSED;
1140 segment_info_type *seginfo = seg_info (sec);
1141 unsigned long offset = 0;
1144 /* Write out the frags. */
1146 || !(bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS))
1149 for (f = seginfo->frchainP->frch_root;
1154 unsigned long fill_size;
1158 assert (f->fr_type == rs_fill);
1161 x = bfd_set_section_contents (stdoutput, sec,
1162 f->fr_literal, (file_ptr) offset,
1163 (bfd_size_type) f->fr_fix);
1166 bfd_perror (stdoutput->filename);
1167 as_perror (_("FATAL: Can't write %s"), stdoutput->filename);
1168 exit (EXIT_FAILURE);
1170 offset += f->fr_fix;
1172 fill_literal = f->fr_literal + f->fr_fix;
1173 fill_size = f->fr_var;
1174 count = f->fr_offset;
1175 assert (count >= 0);
1176 if (fill_size && count)
1179 if (fill_size > sizeof (buf))
1181 /* Do it the old way. Can this ever happen? */
1184 x = bfd_set_section_contents (stdoutput, sec,
1187 (bfd_size_type) fill_size);
1190 bfd_perror (stdoutput->filename);
1191 as_perror (_("FATAL: Can't write %s"),
1192 stdoutput->filename);
1193 exit (EXIT_FAILURE);
1195 offset += fill_size;
1200 /* Build a buffer full of fill objects and output it as
1201 often as necessary. This saves on the overhead of
1202 potentially lots of bfd_set_section_contents calls. */
1206 n_per_buf = sizeof (buf);
1207 memset (buf, *fill_literal, n_per_buf);
1212 n_per_buf = sizeof (buf) / fill_size;
1213 for (i = n_per_buf, bufp = buf; i; i--, bufp += fill_size)
1214 memcpy (bufp, fill_literal, fill_size);
1216 for (; count > 0; count -= n_per_buf)
1218 n_per_buf = n_per_buf > count ? count : n_per_buf;
1219 x = bfd_set_section_contents
1220 (stdoutput, sec, buf, (file_ptr) offset,
1221 (bfd_size_type) n_per_buf * fill_size);
1223 as_fatal (_("cannot write to output file"));
1224 offset += n_per_buf * fill_size;
1232 #if defined(BFD_ASSEMBLER) || (!defined (BFD) && !defined(OBJ_AOUT))
1234 merge_data_into_text ()
1236 #if defined(BFD_ASSEMBLER) || defined(MANY_SEGMENTS)
1237 seg_info (text_section)->frchainP->frch_last->fr_next =
1238 seg_info (data_section)->frchainP->frch_root;
1239 seg_info (text_section)->frchainP->frch_last =
1240 seg_info (data_section)->frchainP->frch_last;
1241 seg_info (data_section)->frchainP = 0;
1245 text_last_frag->fr_next = data_frag_root;
1246 text_last_frag = data_last_frag;
1247 data_last_frag = NULL;
1248 data_frag_root = NULL;
1251 for (tmp = text_fix_root; tmp->fx_next; tmp = tmp->fx_next);;
1252 tmp->fx_next = data_fix_root;
1253 text_fix_tail = data_fix_tail;
1256 text_fix_root = data_fix_root;
1257 data_fix_root = NULL;
1260 #endif /* BFD_ASSEMBLER || (! BFD && ! OBJ_AOUT) */
1262 #if !defined (BFD_ASSEMBLER) && !defined (BFD)
1264 relax_and_size_all_segments ()
1268 relax_segment (text_frag_root, SEG_TEXT);
1269 relax_segment (data_frag_root, SEG_DATA);
1270 relax_segment (bss_frag_root, SEG_BSS);
1272 /* Now the addresses of frags are correct within the segment. */
1273 know (text_last_frag->fr_type == rs_fill && text_last_frag->fr_offset == 0);
1274 H_SET_TEXT_SIZE (&headers, text_last_frag->fr_address);
1275 text_last_frag->fr_address = H_GET_TEXT_SIZE (&headers);
1277 /* Join the 2 segments into 1 huge segment.
1278 To do this, re-compute every rn_address in the SEG_DATA frags.
1279 Then join the data frags after the text frags.
1281 Determine a_data [length of data segment]. */
1284 register relax_addressT slide;
1286 know ((text_last_frag->fr_type == rs_fill)
1287 && (text_last_frag->fr_offset == 0));
1289 H_SET_DATA_SIZE (&headers, data_last_frag->fr_address);
1290 data_last_frag->fr_address = H_GET_DATA_SIZE (&headers);
1291 slide = H_GET_TEXT_SIZE (&headers); /* & in file of the data segment. */
1293 #define RoundUp(N,S) (((N)+(S)-1)&-(S))
1294 /* For b.out: If the data section has a strict alignment
1295 requirement, its load address in the .o file will be
1296 rounded up from the size of the text section. These
1297 two values are *not* the same! Similarly for the bss
1299 slide = RoundUp (slide, 1 << section_alignment[SEG_DATA]);
1302 for (fragP = data_frag_root; fragP; fragP = fragP->fr_next)
1303 fragP->fr_address += slide;
1305 know (text_last_frag != 0);
1306 text_last_frag->fr_next = data_frag_root;
1310 H_SET_DATA_SIZE (&headers, 0);
1314 /* See above comments on b.out data section address. */
1317 if (data_last_frag == 0)
1318 bss_vma = H_GET_TEXT_SIZE (&headers);
1320 bss_vma = data_last_frag->fr_address;
1321 bss_vma = RoundUp (bss_vma, 1 << section_alignment[SEG_BSS]);
1322 bss_address_frag.fr_address = bss_vma;
1324 #else /* ! OBJ_BOUT */
1325 bss_address_frag.fr_address = (H_GET_TEXT_SIZE (&headers) +
1326 H_GET_DATA_SIZE (&headers));
1328 #endif /* ! OBJ_BOUT */
1330 /* Slide all the frags. */
1333 relax_addressT slide = bss_address_frag.fr_address;
1335 for (fragP = bss_frag_root; fragP; fragP = fragP->fr_next)
1336 fragP->fr_address += slide;
1340 H_SET_BSS_SIZE (&headers,
1341 bss_last_frag->fr_address - bss_frag_root->fr_address);
1343 H_SET_BSS_SIZE (&headers, 0);
1345 #endif /* ! BFD_ASSEMBLER && ! BFD */
1347 #if defined (BFD_ASSEMBLER) || !defined (BFD)
1349 #ifdef BFD_ASSEMBLER
1357 extern PTR bfd_alloc PARAMS ((bfd *, bfd_size_type));
1359 /* Count symbols. We can't rely on a count made by the loop in
1360 write_object_file, because *_frob_file may add a new symbol or
1363 for (symp = symbol_rootP; symp; symp = symbol_next (symp))
1369 bfd_size_type amt = (bfd_size_type) nsyms * sizeof (asymbol *);
1371 asympp = (asymbol **) bfd_alloc (stdoutput, amt);
1372 symp = symbol_rootP;
1373 for (i = 0; i < nsyms; i++, symp = symbol_next (symp))
1375 asympp[i] = symbol_get_bfdsym (symp);
1376 symbol_mark_written (symp);
1381 result = bfd_set_symtab (stdoutput, asympp, nsyms);
1383 symbol_table_frozen = 1;
1387 /* Finish the subsegments. After every sub-segment, we fake an
1388 ".align ...". This conforms to BSD4.2 brane-damage. We then fake
1389 ".fill 0" because that is the kind of frag that requires least
1390 thought. ".align" frags like to have a following frag since that
1391 makes calculating their intended length trivial. */
1393 #ifndef SUB_SEGMENT_ALIGN
1395 /* The last subsegment gets an aligment corresponding to the alignment
1396 of the section. This allows proper nop-filling at the end of
1397 code-bearing sections. */
1398 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) \
1399 (!(FRCHAIN)->frch_next || (FRCHAIN)->frch_next->frch_seg != (SEG) \
1400 ? get_recorded_alignment (SEG) : 0)
1402 #ifdef BFD_ASSEMBLER
1403 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
1405 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 2
1413 struct frchain *frchainP;
1415 for (frchainP = frchain_root; frchainP; frchainP = frchainP->frch_next)
1419 subseg_set (frchainP->frch_seg, frchainP->frch_subseg);
1421 /* This now gets called even if we had errors. In that case,
1422 any alignment is meaningless, and, moreover, will look weird
1423 if we are generating a listing. */
1426 alignment = SUB_SEGMENT_ALIGN (now_seg, frchainP);
1427 #ifdef BFD_ASSEMBLER
1428 if ((bfd_get_section_flags (now_seg->owner, now_seg) & SEC_MERGE)
1429 && now_seg->entsize)
1431 unsigned int entsize = now_seg->entsize;
1434 while ((entsize & 1) == 0)
1439 if (entalign > alignment)
1440 alignment = entalign;
1445 if (subseg_text_p (now_seg))
1446 frag_align_code (alignment, 0);
1448 frag_align (alignment, 0, 0);
1450 /* frag_align will have left a new frag.
1451 Use this last frag for an empty ".fill".
1453 For this segment ...
1454 Create a last frag. Do not leave a "being filled in frag". */
1455 frag_wane (frag_now);
1456 frag_now->fr_fix = 0;
1457 know (frag_now->fr_next == NULL);
1461 /* Write the object file. */
1464 write_object_file ()
1466 #if ! defined (BFD_ASSEMBLER) || ! defined (WORKING_DOT_WORD)
1467 fragS *fragP; /* Track along all frags. */
1470 /* Do we really want to write it? */
1472 int n_warns, n_errs;
1473 n_warns = had_warnings ();
1474 n_errs = had_errors ();
1475 /* The -Z flag indicates that an object file should be generated,
1476 regardless of warnings and errors. */
1477 if (flag_always_generate_output)
1479 if (n_warns || n_errs)
1480 as_warn (_("%d error%s, %d warning%s, generating bad object file"),
1481 n_errs, n_errs == 1 ? "" : "s",
1482 n_warns, n_warns == 1 ? "" : "s");
1487 as_fatal (_("%d error%s, %d warning%s, no object file generated"),
1488 n_errs, n_errs == 1 ? "" : "s",
1489 n_warns, n_warns == 1 ? "" : "s");
1494 /* Under VMS we try to be compatible with VAX-11 "C". Thus, we call
1495 a routine to check for the definition of the procedure "_main",
1496 and if so -- fix it up so that it can be program entry point. */
1497 vms_check_for_main ();
1498 #endif /* OBJ_VMS */
1500 /* From now on, we don't care about sub-segments. Build one frag chain
1501 for each segment. Linked thru fr_next. */
1503 #ifdef BFD_ASSEMBLER
1504 /* Remove the sections created by gas for its own purposes. */
1509 seclist = &stdoutput->sections;
1512 if (*seclist == reg_section || *seclist == expr_section)
1514 bfd_section_list_remove (stdoutput, seclist);
1515 stdoutput->section_count--;
1518 seclist = &(*seclist)->next;
1521 bfd_map_over_sections (stdoutput, renumber_sections, &i);
1524 bfd_map_over_sections (stdoutput, chain_frchains_together, (char *) 0);
1526 remove_subsegs (frchain_root, SEG_TEXT, &text_frag_root, &text_last_frag);
1527 remove_subsegs (data0_frchainP, SEG_DATA, &data_frag_root, &data_last_frag);
1528 remove_subsegs (bss0_frchainP, SEG_BSS, &bss_frag_root, &bss_last_frag);
1531 /* We have two segments. If user gave -R flag, then we must put the
1532 data frags into the text segment. Do this before relaxing so
1533 we know to take advantage of -R and make shorter addresses. */
1534 #if !defined (OBJ_AOUT) || defined (BFD_ASSEMBLER)
1535 if (flag_readonly_data_in_text)
1537 merge_data_into_text ();
1541 #ifdef BFD_ASSEMBLER
1546 #ifndef WORKING_DOT_WORD
1547 /* We need to reset the markers in the broken word list and
1548 associated frags between calls to relax_segment (via
1549 relax_seg). Since the broken word list is global, we do it
1550 once per round, rather than locally in relax_segment for each
1552 struct broken_word *brokp;
1554 for (brokp = broken_words;
1555 brokp != (struct broken_word *) NULL;
1556 brokp = brokp->next_broken_word)
1560 if (brokp->dispfrag != (fragS *) NULL
1561 && brokp->dispfrag->fr_type == rs_broken_word)
1562 brokp->dispfrag->fr_subtype = 0;
1567 bfd_map_over_sections (stdoutput, relax_seg, &changed);
1572 /* Note - Most ports will use the default value of
1573 TC_FINALIZE_SYMS_BEFORE_SIZE_SEG, which 1. This will force
1574 local symbols to be resolved, removing their frag information.
1575 Some ports however, will not have finished relaxing all of
1576 their frags and will still need the local symbol frag
1577 information. These ports can set
1578 TC_FINALIZE_SYMS_BEFORE_SIZE_SEG to 0. */
1579 finalize_syms = TC_FINALIZE_SYMS_BEFORE_SIZE_SEG;
1581 bfd_map_over_sections (stdoutput, size_seg, (char *) 0);
1583 relax_and_size_all_segments ();
1584 #endif /* BFD_ASSEMBLER */
1586 /* Relaxation has completed. Freeze all syms. */
1589 #ifdef md_post_relax_hook
1593 #ifndef BFD_ASSEMBLER
1594 /* Crawl the symbol chain.
1596 For each symbol whose value depends on a frag, take the address of
1597 that frag and subsume it into the value of the symbol.
1598 After this, there is just one way to lookup a symbol value.
1599 Values are left in their final state for object file emission.
1600 We adjust the values of 'L' local symbols, even if we do
1601 not intend to emit them to the object file, because their values
1602 are needed for fix-ups.
1604 Unless we saw a -L flag, remove all symbols that begin with 'L'
1605 from the symbol chain. (They are still pointed to by the fixes.)
1607 Count the remaining symbols.
1608 Assign a symbol number to each symbol.
1609 Count the number of string-table chars we will emit.
1610 Put this info into the headers as appropriate. */
1611 know (zero_address_frag.fr_address == 0);
1612 string_byte_count = sizeof (string_byte_count);
1614 obj_crawl_symbol_chain (&headers);
1616 if (string_byte_count == sizeof (string_byte_count))
1617 string_byte_count = 0;
1619 H_SET_STRING_SIZE (&headers, string_byte_count);
1621 /* Addresses of frags now reflect addresses we use in the object file.
1622 Symbol values are correct.
1623 Scan the frags, converting any ".org"s and ".align"s to ".fill"s.
1624 Also converting any machine-dependent frags using md_convert_frag(); */
1625 subseg_change (SEG_TEXT, 0);
1627 for (fragP = text_frag_root; fragP; fragP = fragP->fr_next)
1629 /* At this point we have linked all the frags into a single
1630 chain. However, cvt_frag_to_fill may call md_convert_frag
1631 which may call fix_new. We need to ensure that fix_new adds
1632 the fixup to the right section. */
1633 if (fragP == data_frag_root)
1634 subseg_change (SEG_DATA, 0);
1636 cvt_frag_to_fill (&headers, SEG_TEXT, fragP);
1638 /* Some assert macros don't work with # directives mixed in. */
1640 if (!(fragP->fr_next == NULL
1642 || fragP->fr_next == data_frag_root
1644 || ((offsetT) (fragP->fr_next->fr_address - fragP->fr_address)
1645 == (fragP->fr_fix + fragP->fr_offset * fragP->fr_var))))
1649 #endif /* ! BFD_ASSEMBLER */
1651 #ifndef WORKING_DOT_WORD
1653 struct broken_word *lie;
1654 struct broken_word **prevP;
1656 prevP = &broken_words;
1657 for (lie = broken_words; lie; lie = lie->next_broken_word)
1662 subseg_change (lie->seg, lie->subseg);
1663 exp.X_op = O_subtract;
1664 exp.X_add_symbol = lie->add;
1665 exp.X_op_symbol = lie->sub;
1666 exp.X_add_number = lie->addnum;
1667 #ifdef BFD_ASSEMBLER
1668 #ifdef TC_CONS_FIX_NEW
1669 TC_CONS_FIX_NEW (lie->frag,
1670 lie->word_goes_here - lie->frag->fr_literal,
1673 fix_new_exp (lie->frag,
1674 lie->word_goes_here - lie->frag->fr_literal,
1675 2, &exp, 0, BFD_RELOC_16);
1678 #if defined(TC_SPARC) || defined(TC_A29K) || defined(NEED_FX_R_TYPE)
1679 fix_new_exp (lie->frag,
1680 lie->word_goes_here - lie->frag->fr_literal,
1681 2, &exp, 0, NO_RELOC);
1684 fix_new_ns32k_exp (lie->frag,
1685 lie->word_goes_here - lie->frag->fr_literal,
1686 2, &exp, 0, 0, 2, 0, 0);
1688 fix_new_exp (lie->frag,
1689 lie->word_goes_here - lie->frag->fr_literal,
1691 #endif /* TC_NS32K */
1692 #endif /* TC_SPARC|TC_A29K|NEED_FX_R_TYPE */
1693 #endif /* BFD_ASSEMBLER */
1694 *prevP = lie->next_broken_word;
1697 prevP = &(lie->next_broken_word);
1699 for (lie = broken_words; lie;)
1701 struct broken_word *untruth;
1703 addressT table_addr;
1704 addressT from_addr, to_addr;
1707 subseg_change (lie->seg, lie->subseg);
1708 fragP = lie->dispfrag;
1710 /* Find out how many broken_words go here. */
1713 untruth && untruth->dispfrag == fragP;
1714 untruth = untruth->next_broken_word)
1715 if (untruth->added == 1)
1718 table_ptr = lie->dispfrag->fr_opcode;
1719 table_addr = (lie->dispfrag->fr_address
1720 + (table_ptr - lie->dispfrag->fr_literal));
1721 /* Create the jump around the long jumps. This is a short
1722 jump from table_ptr+0 to table_ptr+n*long_jump_size. */
1723 from_addr = table_addr;
1724 to_addr = table_addr + md_short_jump_size + n * md_long_jump_size;
1725 md_create_short_jump (table_ptr, from_addr, to_addr, lie->dispfrag,
1727 table_ptr += md_short_jump_size;
1728 table_addr += md_short_jump_size;
1731 lie && lie->dispfrag == fragP;
1732 m++, lie = lie->next_broken_word)
1734 if (lie->added == 2)
1736 /* Patch the jump table. */
1737 /* This is the offset from ??? to table_ptr+0. */
1738 to_addr = table_addr - S_GET_VALUE (lie->sub);
1739 #ifdef TC_CHECK_ADJUSTED_BROKEN_DOT_WORD
1740 TC_CHECK_ADJUSTED_BROKEN_DOT_WORD (to_addr, lie);
1742 md_number_to_chars (lie->word_goes_here, to_addr, 2);
1743 for (untruth = lie->next_broken_word;
1744 untruth && untruth->dispfrag == fragP;
1745 untruth = untruth->next_broken_word)
1747 if (untruth->use_jump == lie)
1748 md_number_to_chars (untruth->word_goes_here, to_addr, 2);
1751 /* Install the long jump. */
1752 /* This is a long jump from table_ptr+0 to the final target. */
1753 from_addr = table_addr;
1754 to_addr = S_GET_VALUE (lie->add) + lie->addnum;
1755 md_create_long_jump (table_ptr, from_addr, to_addr, lie->dispfrag,
1757 table_ptr += md_long_jump_size;
1758 table_addr += md_long_jump_size;
1762 #endif /* not WORKING_DOT_WORD */
1764 #ifndef BFD_ASSEMBLER
1767 char *the_object_file;
1768 long object_file_size;
1769 /* Scan every FixS performing fixups. We had to wait until now to
1770 do this because md_convert_frag() may have made some fixSs. */
1773 subseg_change (SEG_TEXT, 0);
1774 trsize = md_reloc_size * fixup_segment (text_fix_root, SEG_TEXT);
1775 subseg_change (SEG_DATA, 0);
1776 drsize = md_reloc_size * fixup_segment (data_fix_root, SEG_DATA);
1777 H_SET_RELOCATION_SIZE (&headers, trsize, drsize);
1779 /* FIXME: Move this stuff into the pre-write-hook. */
1780 H_SET_MAGIC_NUMBER (&headers, magic_number_for_object_file);
1781 H_SET_ENTRY_POINT (&headers, 0);
1783 obj_pre_write_hook (&headers); /* Extra coff stuff. */
1785 object_file_size = H_GET_FILE_SIZE (&headers);
1786 next_object_file_charP = the_object_file = xmalloc (object_file_size);
1788 output_file_create (out_file_name);
1790 obj_header_append (&next_object_file_charP, &headers);
1792 know ((next_object_file_charP - the_object_file)
1793 == H_GET_HEADER_SIZE (&headers));
1796 for (fragP = text_frag_root; fragP; fragP = fragP->fr_next)
1798 register long count;
1799 register char *fill_literal;
1800 register long fill_size;
1803 know (fragP->fr_type == rs_fill);
1804 append (&next_object_file_charP, fragP->fr_literal,
1805 (unsigned long) fragP->fr_fix);
1806 fill_literal = fragP->fr_literal + fragP->fr_fix;
1807 fill_size = fragP->fr_var;
1808 know (fragP->fr_offset >= 0);
1810 for (count = fragP->fr_offset; count; count--)
1811 append (&next_object_file_charP, fill_literal,
1812 (unsigned long) fill_size);
1815 know ((next_object_file_charP - the_object_file)
1816 == (H_GET_HEADER_SIZE (&headers)
1817 + H_GET_TEXT_SIZE (&headers)
1818 + H_GET_DATA_SIZE (&headers)));
1820 /* Emit relocations. */
1821 obj_emit_relocations (&next_object_file_charP, text_fix_root,
1822 (relax_addressT) 0);
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 + H_GET_TEXT_RELOCATION_SIZE (&headers)));
1829 /* Make addresses in data relocation directives relative to beginning of
1830 first data fragment, not end of last text fragment: alignment of the
1831 start of the data segment may place a gap between the segments. */
1832 obj_emit_relocations (&next_object_file_charP, data_fix_root,
1833 data0_frchainP->frch_root->fr_address);
1835 obj_emit_relocations (&next_object_file_charP, data_fix_root,
1836 text_last_frag->fr_address);
1837 #endif /* TC_I960 */
1839 know ((next_object_file_charP - the_object_file)
1840 == (H_GET_HEADER_SIZE (&headers)
1841 + H_GET_TEXT_SIZE (&headers)
1842 + H_GET_DATA_SIZE (&headers)
1843 + H_GET_TEXT_RELOCATION_SIZE (&headers)
1844 + H_GET_DATA_RELOCATION_SIZE (&headers)));
1846 /* Emit line number entries. */
1847 OBJ_EMIT_LINENO (&next_object_file_charP, lineno_rootP, the_object_file);
1848 know ((next_object_file_charP - the_object_file)
1849 == (H_GET_HEADER_SIZE (&headers)
1850 + H_GET_TEXT_SIZE (&headers)
1851 + H_GET_DATA_SIZE (&headers)
1852 + H_GET_TEXT_RELOCATION_SIZE (&headers)
1853 + H_GET_DATA_RELOCATION_SIZE (&headers)
1854 + H_GET_LINENO_SIZE (&headers)));
1857 obj_emit_symbols (&next_object_file_charP, symbol_rootP);
1858 know ((next_object_file_charP - the_object_file)
1859 == (H_GET_HEADER_SIZE (&headers)
1860 + H_GET_TEXT_SIZE (&headers)
1861 + H_GET_DATA_SIZE (&headers)
1862 + H_GET_TEXT_RELOCATION_SIZE (&headers)
1863 + H_GET_DATA_RELOCATION_SIZE (&headers)
1864 + H_GET_LINENO_SIZE (&headers)
1865 + H_GET_SYMBOL_TABLE_SIZE (&headers)));
1868 if (string_byte_count > 0)
1869 obj_emit_strings (&next_object_file_charP);
1872 bfd_seek (stdoutput, (file_ptr) 0, 0);
1873 bfd_bwrite (the_object_file, (bfd_size_type) object_file_size, stdoutput);
1876 /* Write the data to the file. */
1877 output_file_append (the_object_file, object_file_size, out_file_name);
1878 free (the_object_file);
1882 /* Now do the VMS-dependent part of writing the object file. */
1883 vms_write_object_file (H_GET_TEXT_SIZE (&headers),
1884 H_GET_DATA_SIZE (&headers),
1885 H_GET_BSS_SIZE (&headers),
1886 text_frag_root, data_frag_root);
1887 #endif /* OBJ_VMS */
1888 #else /* BFD_ASSEMBLER */
1890 /* Resolve symbol values. This needs to be done before processing
1896 for (symp = symbol_rootP; symp; symp = symbol_next (symp))
1897 resolve_symbol_value (symp);
1899 resolve_local_symbol_values ();
1903 #ifdef tc_frob_file_before_adjust
1904 tc_frob_file_before_adjust ();
1906 #ifdef obj_frob_file_before_adjust
1907 obj_frob_file_before_adjust ();
1910 bfd_map_over_sections (stdoutput, adjust_reloc_syms, (char *) 0);
1912 #ifdef tc_frob_file_before_fix
1913 tc_frob_file_before_fix ();
1915 #ifdef obj_frob_file_before_fix
1916 obj_frob_file_before_fix ();
1919 bfd_map_over_sections (stdoutput, fix_segment, (char *) 0);
1921 /* Set up symbol table, and write it out. */
1926 for (symp = symbol_rootP; symp; symp = symbol_next (symp))
1931 if (symbol_mri_common_p (symp))
1933 if (S_IS_EXTERNAL (symp))
1934 as_bad (_("%s: global symbols not supported in common sections"),
1936 symbol_remove (symp, &symbol_rootP, &symbol_lastP);
1940 name = S_GET_NAME (symp);
1944 decode_local_label_name ((char *) S_GET_NAME (symp));
1945 /* They only differ if `name' is a fb or dollar local
1947 if (name2 != name && ! S_IS_DEFINED (symp))
1948 as_bad (_("local label `%s' is not defined"), name2);
1951 /* Do it again, because adjust_reloc_syms might introduce
1952 more symbols. They'll probably only be section symbols,
1953 but they'll still need to have the values computed. */
1954 resolve_symbol_value (symp);
1956 /* Skip symbols which were equated to undefined or common
1958 if (symbol_equated_reloc_p (symp))
1960 symbol_remove (symp, &symbol_rootP, &symbol_lastP);
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);
1970 printf ("symbol `%s'\n\t@%x: value=%d flags=%x seg=%s\n",
1971 S_GET_NAME (symp), symp,
1973 symbol_get_bfdsym (symp)->flags,
1974 segment_name (S_GET_SEGMENT (symp)));
1977 #ifdef obj_frob_symbol
1978 obj_frob_symbol (symp, punt);
1980 #ifdef tc_frob_symbol
1981 if (! punt || symbol_used_in_reloc_p (symp))
1982 tc_frob_symbol (symp, punt);
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 (symp == abs_section_sym
1991 || (! EMIT_SECTION_SYMBOLS
1992 && symbol_section_p (symp))
1993 /* Note that S_IS_EXTERN and S_IS_LOCAL are not always
1994 opposites. Sometimes the former checks flags and the
1995 latter examines the name... */
1996 || (!S_IS_EXTERN (symp)
1997 && (punt || S_IS_LOCAL (symp))
1998 && ! symbol_used_in_reloc_p (symp)))
2000 symbol_remove (symp, &symbol_rootP, &symbol_lastP);
2002 /* After symbol_remove, symbol_next(symp) still returns
2003 the one that came after it in the chain. So we don't
2004 need to do any extra cleanup work here. */
2008 /* Make sure we really got a value for the symbol. */
2009 if (! symbol_resolved_p (symp))
2011 as_bad (_("can't resolve value for symbol `%s'"),
2013 symbol_mark_resolved (symp);
2016 /* Set the value into the BFD symbol. Up til now the value
2017 has only been kept in the gas symbolS struct. */
2018 symbol_get_bfdsym (symp)->value = S_GET_VALUE (symp);
2024 /* Now do any format-specific adjustments to the symbol table, such
2025 as adding file symbols. */
2026 #ifdef tc_adjust_symtab
2027 tc_adjust_symtab ();
2029 #ifdef obj_adjust_symtab
2030 obj_adjust_symtab ();
2033 /* Now that all the sizes are known, and contents correct, we can
2034 start writing to the file. */
2037 /* If *_frob_file changes the symbol value at this point, it is
2038 responsible for moving the changed value into symp->bsym->value
2039 as well. Hopefully all symbol value changing can be done in
2044 #ifdef obj_frob_file
2048 bfd_map_over_sections (stdoutput, write_relocs, (char *) 0);
2050 #ifdef tc_frob_file_after_relocs
2051 tc_frob_file_after_relocs ();
2053 #ifdef obj_frob_file_after_relocs
2054 obj_frob_file_after_relocs ();
2057 bfd_map_over_sections (stdoutput, write_contents, (char *) 0);
2058 #endif /* BFD_ASSEMBLER */
2062 #ifdef TC_GENERIC_RELAX_TABLE
2064 /* Relax a fragment by scanning TC_GENERIC_RELAX_TABLE. */
2067 relax_frag (segment, fragP, stretch)
2072 const relax_typeS *this_type;
2073 const relax_typeS *start_type;
2074 relax_substateT next_state;
2075 relax_substateT this_state;
2081 const relax_typeS *table;
2083 target = fragP->fr_offset;
2084 address = fragP->fr_address;
2085 table = TC_GENERIC_RELAX_TABLE;
2086 this_state = fragP->fr_subtype;
2087 start_type = this_type = table + this_state;
2088 symbolP = fragP->fr_symbol;
2094 sym_frag = symbol_get_frag (symbolP);
2096 #ifndef DIFF_EXPR_OK
2097 #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER)
2098 know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE)
2099 || (S_GET_SEGMENT (symbolP) == SEG_DATA)
2100 || (S_GET_SEGMENT (symbolP) == SEG_BSS)
2101 || (S_GET_SEGMENT (symbolP) == SEG_TEXT));
2103 know (sym_frag != NULL);
2105 know (S_GET_SEGMENT (symbolP) != absolute_section
2106 || sym_frag == &zero_address_frag);
2107 target += S_GET_VALUE (symbolP);
2109 /* If frag has yet to be reached on this pass,
2110 assume it will move by STRETCH just as we did.
2111 If this is not so, it will be because some frag
2112 between grows, and that will force another pass. */
2115 && sym_frag->relax_marker != fragP->relax_marker
2116 && S_GET_SEGMENT (symbolP) == segment)
2122 aim = target - address - fragP->fr_fix;
2123 #ifdef TC_PCREL_ADJUST
2124 /* Currently only the ns32k family needs this. */
2125 aim += TC_PCREL_ADJUST (fragP);
2127 /* This machine doesn't want to use pcrel_adjust.
2128 In that case, pcrel_adjust should be zero. */
2130 assert (fragP->fr_targ.ns32k.pcrel_adjust == 0);
2133 #ifdef md_prepare_relax_scan /* formerly called M68K_AIM_KLUDGE */
2134 md_prepare_relax_scan (fragP, address, aim, this_state, this_type);
2139 /* Look backwards. */
2140 for (next_state = this_type->rlx_more; next_state;)
2141 if (aim >= this_type->rlx_backward)
2145 /* Grow to next state. */
2146 this_state = next_state;
2147 this_type = table + this_state;
2148 next_state = this_type->rlx_more;
2153 /* Look forwards. */
2154 for (next_state = this_type->rlx_more; next_state;)
2155 if (aim <= this_type->rlx_forward)
2159 /* Grow to next state. */
2160 this_state = next_state;
2161 this_type = table + this_state;
2162 next_state = this_type->rlx_more;
2166 growth = this_type->rlx_length - start_type->rlx_length;
2168 fragP->fr_subtype = this_state;
2172 #endif /* defined (TC_GENERIC_RELAX_TABLE) */
2174 /* Relax_align. Advance location counter to next address that has 'alignment'
2175 lowest order bits all 0s, return size of adjustment made. */
2176 static relax_addressT
2177 relax_align (address, alignment)
2178 register relax_addressT address; /* Address now. */
2179 register int alignment; /* Alignment (binary). */
2181 relax_addressT mask;
2182 relax_addressT new_address;
2184 mask = ~((~0) << alignment);
2185 new_address = (address + mask) & (~mask);
2186 #ifdef LINKER_RELAXING_SHRINKS_ONLY
2188 /* We must provide lots of padding, so the linker can discard it
2189 when needed. The linker will not add extra space, ever. */
2190 new_address += (1 << alignment);
2192 return (new_address - address);
2195 /* Now we have a segment, not a crowd of sub-segments, we can make
2200 After this, all frags in this segment have addresses that are correct
2201 within the segment. Since segments live in different file addresses,
2202 these frag addresses may not be the same as final object-file
2206 relax_segment (segment_frag_root, segment)
2207 struct frag *segment_frag_root;
2210 register struct frag *fragP;
2211 register relax_addressT address;
2214 #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER)
2215 know (segment == SEG_DATA || segment == SEG_TEXT || segment == SEG_BSS);
2217 /* In case md_estimate_size_before_relax() wants to make fixSs. */
2218 subseg_change (segment, 0);
2220 /* For each frag in segment: count and store (a 1st guess of)
2223 for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next)
2225 fragP->relax_marker = 0;
2226 fragP->fr_address = address;
2227 address += fragP->fr_fix;
2229 switch (fragP->fr_type)
2232 address += fragP->fr_offset * fragP->fr_var;
2239 addressT offset = relax_align (address, (int) fragP->fr_offset);
2241 if (fragP->fr_subtype != 0 && offset > fragP->fr_subtype)
2244 if (offset % fragP->fr_var != 0)
2246 as_bad_where (fragP->fr_file, fragP->fr_line,
2247 _("alignment padding (%lu bytes) not a multiple of %ld"),
2248 (unsigned long) offset, (long) fragP->fr_var);
2249 offset -= (offset % fragP->fr_var);
2258 /* Assume .org is nugatory. It will grow with 1st relax. */
2261 case rs_machine_dependent:
2262 /* If fr_symbol is an expression, this call to
2263 resolve_symbol_value sets up the correct segment, which will
2264 likely be needed in md_estimate_size_before_relax. */
2265 if (fragP->fr_symbol)
2266 resolve_symbol_value (fragP->fr_symbol);
2268 address += md_estimate_size_before_relax (fragP, segment);
2271 #ifndef WORKING_DOT_WORD
2272 /* Broken words don't concern us yet. */
2273 case rs_broken_word:
2278 /* Initial guess is always 1; doing otherwise can result in
2279 stable solutions that are larger than the minimum. */
2280 address += fragP->fr_offset = 1;
2284 address += eh_frame_estimate_size_before_relax (fragP);
2288 address += dwarf2dbg_estimate_size_before_relax (fragP);
2292 BAD_CASE (fragP->fr_type);
2299 long stretch; /* May be any size, 0 or negative. */
2300 /* Cumulative number of addresses we have relaxed this pass.
2301 We may have relaxed more than one address. */
2302 int stretched; /* Have we stretched on this pass? */
2303 /* This is 'cuz stretch may be zero, when, in fact some piece of code
2304 grew, and another shrank. If a branch instruction doesn't fit anymore,
2305 we could be scrod. */
2312 for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next)
2315 addressT was_address;
2319 fragP->relax_marker ^= 1;
2320 was_address = fragP->fr_address;
2321 address = fragP->fr_address += stretch;
2322 symbolP = fragP->fr_symbol;
2323 offset = fragP->fr_offset;
2325 switch (fragP->fr_type)
2327 case rs_fill: /* .fill never relaxes. */
2331 #ifndef WORKING_DOT_WORD
2332 /* JF: This is RMS's idea. I do *NOT* want to be blamed
2333 for it I do not want to write it. I do not want to have
2334 anything to do with it. This is not the proper way to
2335 implement this misfeature. */
2336 case rs_broken_word:
2338 struct broken_word *lie;
2339 struct broken_word *untruth;
2341 /* Yes this is ugly (storing the broken_word pointer
2342 in the symbol slot). Still, this whole chunk of
2343 code is ugly, and I don't feel like doing anything
2344 about it. Think of it as stubbornness in action. */
2346 for (lie = (struct broken_word *) (fragP->fr_symbol);
2347 lie && lie->dispfrag == fragP;
2348 lie = lie->next_broken_word)
2354 offset = (S_GET_VALUE (lie->add)
2356 - S_GET_VALUE (lie->sub));
2357 if (offset <= -32768 || offset >= 32767)
2359 if (flag_warn_displacement)
2362 sprint_value (buf, (addressT) lie->addnum);
2363 as_warn_where (fragP->fr_file, fragP->fr_line,
2364 _(".word %s-%s+%s didn't fit"),
2365 S_GET_NAME (lie->add),
2366 S_GET_NAME (lie->sub),
2370 if (fragP->fr_subtype == 0)
2372 fragP->fr_subtype++;
2373 growth += md_short_jump_size;
2375 for (untruth = lie->next_broken_word;
2376 untruth && untruth->dispfrag == lie->dispfrag;
2377 untruth = untruth->next_broken_word)
2378 if ((symbol_get_frag (untruth->add)
2379 == symbol_get_frag (lie->add))
2380 && (S_GET_VALUE (untruth->add)
2381 == S_GET_VALUE (lie->add)))
2384 untruth->use_jump = lie;
2386 growth += md_long_jump_size;
2391 } /* case rs_broken_word */
2397 addressT oldoff, newoff;
2399 oldoff = relax_align (was_address + fragP->fr_fix,
2401 newoff = relax_align (address + fragP->fr_fix,
2404 if (fragP->fr_subtype != 0)
2406 if (oldoff > fragP->fr_subtype)
2408 if (newoff > fragP->fr_subtype)
2412 growth = newoff - oldoff;
2418 addressT target = offset;
2423 #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER)
2424 know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE)
2425 || (S_GET_SEGMENT (symbolP) == SEG_DATA)
2426 || (S_GET_SEGMENT (symbolP) == SEG_TEXT)
2427 || S_GET_SEGMENT (symbolP) == SEG_BSS);
2428 know (symbolP->sy_frag);
2429 know (!(S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE)
2430 || (symbolP->sy_frag == &zero_address_frag));
2432 /* Convert from an actual address to an octet offset
2433 into the section. Here it is assumed that the
2434 section's VMA is zero, and can omit subtracting it
2435 from the symbol's value to get the address offset. */
2436 know (S_GET_SECTION (symbolP)->vma == 0);
2437 target += S_GET_VALUE (symbolP) * OCTETS_PER_BYTE;
2440 know (fragP->fr_next);
2441 after = fragP->fr_next->fr_address;
2442 growth = target - after;
2445 /* Growth may be negative, but variable part of frag
2446 cannot have fewer than 0 chars. That is, we can't
2448 as_bad_where (fragP->fr_file, fragP->fr_line,
2449 _("attempt to .org backwards"));
2451 /* We've issued an error message. Change the
2452 frag to avoid cascading errors. */
2453 fragP->fr_type = rs_align;
2454 fragP->fr_subtype = 0;
2455 fragP->fr_offset = 0;
2456 fragP->fr_fix = after - address;
2460 /* This is an absolute growth factor */
2471 amount = S_GET_VALUE (symbolP);
2472 if (S_GET_SEGMENT (symbolP) != absolute_section
2473 || S_IS_COMMON (symbolP)
2474 || ! S_IS_DEFINED (symbolP))
2476 as_bad_where (fragP->fr_file, fragP->fr_line,
2477 _(".space specifies non-absolute value"));
2478 /* Prevent repeat of this error message. */
2479 fragP->fr_symbol = 0;
2481 else if (amount < 0)
2483 as_warn_where (fragP->fr_file, fragP->fr_line,
2484 _(".space or .fill with negative value, ignored"));
2485 fragP->fr_symbol = 0;
2488 growth = (was_address + fragP->fr_fix + amount
2489 - fragP->fr_next->fr_address);
2493 case rs_machine_dependent:
2494 #ifdef md_relax_frag
2495 growth = md_relax_frag (segment, fragP, stretch);
2497 #ifdef TC_GENERIC_RELAX_TABLE
2498 /* The default way to relax a frag is to look through
2499 TC_GENERIC_RELAX_TABLE. */
2500 growth = relax_frag (segment, fragP, stretch);
2501 #endif /* TC_GENERIC_RELAX_TABLE */
2510 value = resolve_symbol_value (fragP->fr_symbol);
2511 size = sizeof_leb128 (value, fragP->fr_subtype);
2512 growth = size - fragP->fr_offset;
2513 fragP->fr_offset = size;
2518 growth = eh_frame_relax_frag (fragP);
2522 growth = dwarf2dbg_relax_frag (fragP);
2526 BAD_CASE (fragP->fr_type);
2534 } /* For each frag in the segment. */
2536 while (stretched); /* Until nothing further to relax. */
2540 for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next)
2541 if (fragP->last_fr_address != fragP->fr_address)
2543 fragP->last_fr_address = fragP->fr_address;
2549 #if defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS))
2553 Go through all the fixS's in a segment and see which ones can be
2554 handled now. (These consist of fixS where we have since discovered
2555 the value of a symbol, or the address of the frag involved.)
2556 For each one, call md_apply_fix3 to put the fix into the frag data.
2558 Result is a count of how many relocation structs will be needed to
2559 handle the remaining fixS's that we couldn't completely handle here.
2560 These will be output later by emit_relocations(). */
2563 fixup_segment (fixP, this_segment)
2567 long seg_reloc_count = 0;
2570 segT add_symbol_segment = absolute_section;
2572 if (fixP != NULL && abs_section_sym == NULL)
2574 #ifndef BFD_ASSEMBLER
2575 abs_section_sym = &abs_symbol;
2577 abs_section_sym = section_symbol (absolute_section);
2581 /* If the linker is doing the relaxing, we must not do any fixups.
2583 Well, strictly speaking that's not true -- we could do any that
2584 are PC-relative and don't cross regions that could change size.
2585 And for the i960 we might be able to turn callx/callj into bal
2586 anyways in cases where we know the maximum displacement. */
2587 if (linkrelax && TC_LINKRELAX_FIXUP (this_segment))
2589 for (; fixP; fixP = fixP->fx_next)
2592 if (fixP->fx_addsy == NULL)
2594 /* There was no symbol required by this relocation.
2595 However, BFD doesn't really handle relocations
2596 without symbols well. So fake up a local symbol in
2597 the absolute section. */
2598 fixP->fx_addsy = abs_section_sym;
2600 symbol_mark_used_in_reloc (fixP->fx_addsy);
2601 if (fixP->fx_subsy != NULL)
2602 symbol_mark_used_in_reloc (fixP->fx_subsy);
2605 TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count);
2606 return seg_reloc_count;
2609 for (; fixP; fixP = fixP->fx_next)
2612 fprintf (stderr, "\nprocessing fixup:\n");
2616 fragP = fixP->fx_frag;
2618 #ifdef TC_VALIDATE_FIX
2619 TC_VALIDATE_FIX (fixP, this_segment, skip);
2621 add_number = fixP->fx_offset;
2623 if (fixP->fx_addsy != NULL
2624 && symbol_mri_common_p (fixP->fx_addsy))
2626 know (fixP->fx_addsy->sy_value.X_op == O_symbol);
2627 add_number += S_GET_VALUE (fixP->fx_addsy);
2628 fixP->fx_offset = add_number;
2630 = symbol_get_value_expression (fixP->fx_addsy)->X_add_symbol;
2633 if (fixP->fx_addsy != NULL)
2634 add_symbol_segment = S_GET_SEGMENT (fixP->fx_addsy);
2636 if (fixP->fx_subsy != NULL)
2638 segT sub_symbol_segment;
2639 resolve_symbol_value (fixP->fx_subsy);
2640 sub_symbol_segment = S_GET_SEGMENT (fixP->fx_subsy);
2641 if (fixP->fx_addsy != NULL
2642 && sub_symbol_segment == add_symbol_segment
2643 && !TC_FORCE_RELOCATION_SUB_SAME (fixP, add_symbol_segment))
2645 add_number += S_GET_VALUE (fixP->fx_addsy);
2646 add_number -= S_GET_VALUE (fixP->fx_subsy);
2647 fixP->fx_offset = add_number;
2648 /* If the back-end code has selected a pc-relative
2649 reloc, adjust the value to be pc-relative. */
2652 /* See the comment below about 68k weirdness. */
2656 add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment);
2657 fixP->fx_addsy = NULL;
2658 fixP->fx_subsy = NULL;
2661 else if (sub_symbol_segment == absolute_section
2662 && !TC_FORCE_RELOCATION_SUB_ABS (fixP))
2664 add_number -= S_GET_VALUE (fixP->fx_subsy);
2665 fixP->fx_offset = add_number;
2666 fixP->fx_subsy = NULL;
2668 else if (sub_symbol_segment == this_segment
2669 && !TC_FORCE_RELOCATION_SUB_LOCAL (fixP))
2671 add_number -= S_GET_VALUE (fixP->fx_subsy);
2672 fixP->fx_offset = (add_number + fixP->fx_dot_value
2673 + fixP->fx_frag->fr_address);
2675 /* Make it pc-relative. If the back-end code has not
2676 selected a pc-relative reloc, cancel the adjustment
2677 we do later on all pc-relative relocs. */
2680 /* Do this for m68k even if it's already described
2681 as pc-relative. On the m68k, an operand of
2682 "pc@(foo-.-2)" should address "foo" in a
2683 pc-relative mode. */
2687 add_number += MD_PCREL_FROM_SECTION (fixP, this_segment);
2688 fixP->fx_subsy = NULL;
2691 else if (!TC_VALIDATE_FIX_SUB (fixP))
2693 as_bad_where (fixP->fx_file, fixP->fx_line,
2694 _("can't resolve `%s' {%s section} - `%s' {%s section}"),
2695 fixP->fx_addsy ? S_GET_NAME (fixP->fx_addsy) : "0",
2696 segment_name (add_symbol_segment),
2697 S_GET_NAME (fixP->fx_subsy),
2698 segment_name (sub_symbol_segment));
2704 if (add_symbol_segment == this_segment
2705 && !TC_FORCE_RELOCATION_LOCAL (fixP))
2707 /* This fixup was made when the symbol's segment was
2708 SEG_UNKNOWN, but it is now in the local segment.
2709 So we know how to do the address without relocation. */
2710 add_number += S_GET_VALUE (fixP->fx_addsy);
2711 fixP->fx_offset = add_number;
2713 add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment);
2714 fixP->fx_addsy = NULL;
2717 else if (add_symbol_segment == absolute_section
2718 && !TC_FORCE_RELOCATION_ABS (fixP))
2720 add_number += S_GET_VALUE (fixP->fx_addsy);
2721 fixP->fx_offset = add_number;
2722 fixP->fx_addsy = NULL;
2724 else if (add_symbol_segment != undefined_section
2725 #ifdef BFD_ASSEMBLER
2726 && ! bfd_is_com_section (add_symbol_segment)
2728 && MD_APPLY_SYM_VALUE (fixP))
2729 add_number += S_GET_VALUE (fixP->fx_addsy);
2734 add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment);
2735 if (!fixP->fx_done && fixP->fx_addsy == NULL)
2737 /* There was no symbol required by this relocation.
2738 However, BFD doesn't really handle relocations
2739 without symbols well. So fake up a local symbol in
2740 the absolute section. */
2741 fixP->fx_addsy = abs_section_sym;
2746 md_apply_fix3 (fixP, &add_number, this_segment);
2751 if (fixP->fx_addsy == NULL)
2752 fixP->fx_addsy = abs_section_sym;
2753 symbol_mark_used_in_reloc (fixP->fx_addsy);
2754 if (fixP->fx_subsy != NULL)
2755 symbol_mark_used_in_reloc (fixP->fx_subsy);
2758 if (!fixP->fx_bit_fixP && !fixP->fx_no_overflow && fixP->fx_size != 0)
2760 if (fixP->fx_size < sizeof (valueT))
2765 mask--; /* Set all bits to one. */
2766 mask <<= fixP->fx_size * 8 - (fixP->fx_signed ? 1 : 0);
2767 if ((add_number & mask) != 0 && (add_number & mask) != mask)
2769 char buf[50], buf2[50];
2770 sprint_value (buf, fragP->fr_address + fixP->fx_where);
2771 if (add_number > 1000)
2772 sprint_value (buf2, add_number);
2774 sprintf (buf2, "%ld", (long) add_number);
2775 as_bad_where (fixP->fx_file, fixP->fx_line,
2776 _("value of %s too large for field of %d bytes at %s"),
2777 buf2, fixP->fx_size, buf);
2778 } /* Generic error checking. */
2780 #ifdef WARN_SIGNED_OVERFLOW_WORD
2781 /* Warn if a .word value is too large when treated as a signed
2782 number. We already know it is not too negative. This is to
2783 catch over-large switches generated by gcc on the 68k. */
2784 if (!flag_signed_overflow_ok
2785 && fixP->fx_size == 2
2786 && add_number > 0x7fff)
2787 as_bad_where (fixP->fx_file, fixP->fx_line,
2788 _("signed .word overflow; switch may be too large; %ld at 0x%lx"),
2790 (long) (fragP->fr_address + fixP->fx_where));
2792 } /* Not a bit fix. */
2794 #ifdef TC_VALIDATE_FIX
2795 skip: ATTRIBUTE_UNUSED_LABEL
2799 fprintf (stderr, "result:\n");
2802 } /* For each fixS in this segment. */
2804 TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count);
2805 return seg_reloc_count;
2808 #endif /* defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS)) */
2811 number_to_chars_bigendian (buf, val, n)
2820 buf[n] = val & 0xff;
2826 number_to_chars_littleendian (buf, val, n)
2835 *buf++ = val & 0xff;
2841 write_print_statistics (file)
2844 fprintf (file, "fixups: %d\n", n_fixups);
2847 /* For debugging. */
2848 extern int indent_level;
2855 fprintf (stderr, "fix %lx %s:%d", (long) fixp, fixp->fx_file, fixp->fx_line);
2857 fprintf (stderr, " pcrel");
2858 if (fixp->fx_pcrel_adjust)
2859 fprintf (stderr, " pcrel_adjust=%d", fixp->fx_pcrel_adjust);
2860 if (fixp->fx_im_disp)
2863 fprintf (stderr, " im_disp=%d", fixp->fx_im_disp);
2865 fprintf (stderr, " im_disp");
2869 fprintf (stderr, " tcbit");
2871 fprintf (stderr, " done");
2872 fprintf (stderr, "\n size=%d frag=%lx where=%ld offset=%lx addnumber=%lx",
2873 fixp->fx_size, (long) fixp->fx_frag, (long) fixp->fx_where,
2874 (long) fixp->fx_offset, (long) fixp->fx_addnumber);
2875 #ifdef BFD_ASSEMBLER
2876 fprintf (stderr, "\n %s (%d)", bfd_get_reloc_code_name (fixp->fx_r_type),
2879 #ifdef NEED_FX_R_TYPE
2880 fprintf (stderr, " r_type=%d", fixp->fx_r_type);
2885 fprintf (stderr, "\n +<");
2886 print_symbol_value_1 (stderr, fixp->fx_addsy);
2887 fprintf (stderr, ">");
2891 fprintf (stderr, "\n -<");
2892 print_symbol_value_1 (stderr, fixp->fx_subsy);
2893 fprintf (stderr, ">");
2895 fprintf (stderr, "\n");
2896 #ifdef TC_FIX_DATA_PRINT
2897 TC_FIX_DATA_PRINT (stderr, fixp);