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, 2004, 2005, 2006, 2007, 2008, 2009,
4 2010 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 3, 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, 51 Franklin Street - Fifth Floor, Boston, MA
23 /* This thing should be set up to do byteordering correctly. But... */
28 #include "output-file.h"
29 #include "dwarf2dbg.h"
31 #include "compress-debug.h"
33 #ifndef TC_ADJUST_RELOC_COUNT
34 #define TC_ADJUST_RELOC_COUNT(FIX, COUNT)
37 #ifndef TC_FORCE_RELOCATION
38 #define TC_FORCE_RELOCATION(FIX) \
39 (generic_force_reloc (FIX))
42 #ifndef TC_FORCE_RELOCATION_ABS
43 #define TC_FORCE_RELOCATION_ABS(FIX) \
44 (TC_FORCE_RELOCATION (FIX))
47 #ifndef TC_FORCE_RELOCATION_LOCAL
48 #define TC_FORCE_RELOCATION_LOCAL(FIX) \
50 || TC_FORCE_RELOCATION (FIX))
53 #ifndef TC_FORCE_RELOCATION_SUB_SAME
54 #define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEG) \
58 #ifndef md_register_arithmetic
59 # define md_register_arithmetic 1
62 #ifndef TC_FORCE_RELOCATION_SUB_ABS
63 #define TC_FORCE_RELOCATION_SUB_ABS(FIX, SEG) \
64 (!md_register_arithmetic && (SEG) == reg_section)
67 #ifndef TC_FORCE_RELOCATION_SUB_LOCAL
69 #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) \
70 (!md_register_arithmetic && (SEG) == reg_section)
72 #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) 1
76 #ifndef TC_VALIDATE_FIX_SUB
77 #ifdef UNDEFINED_DIFFERENCE_OK
78 /* The PA needs this for PIC code generation. */
79 #define TC_VALIDATE_FIX_SUB(FIX, SEG) \
80 (md_register_arithmetic || (SEG) != reg_section)
82 #define TC_VALIDATE_FIX_SUB(FIX, SEG) \
83 ((md_register_arithmetic || (SEG) != reg_section) \
84 && ((FIX)->fx_r_type == BFD_RELOC_GPREL32 \
85 || (FIX)->fx_r_type == BFD_RELOC_GPREL16))
89 #ifndef TC_LINKRELAX_FIXUP
90 #define TC_LINKRELAX_FIXUP(SEG) 1
93 #ifndef MD_APPLY_SYM_VALUE
94 #define MD_APPLY_SYM_VALUE(FIX) 1
97 #ifndef TC_FINALIZE_SYMS_BEFORE_SIZE_SEG
98 #define TC_FINALIZE_SYMS_BEFORE_SIZE_SEG 1
101 #ifndef MD_PCREL_FROM_SECTION
102 #define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from (FIX)
105 #ifndef TC_FAKE_LABEL
106 #define TC_FAKE_LABEL(NAME) (strcmp ((NAME), FAKE_LABEL_NAME) == 0)
109 /* Positive values of TC_FX_SIZE_SLACK allow a target to define
110 fixups that far past the end of a frag. Having such fixups
111 is of course most most likely a bug in setting fx_size correctly.
112 A negative value disables the fixup check entirely, which is
113 appropriate for something like the Renesas / SuperH SH_COUNT
115 #ifndef TC_FX_SIZE_SLACK
116 #define TC_FX_SIZE_SLACK(FIX) 0
119 /* Used to control final evaluation of expressions. */
120 int finalize_syms = 0;
122 int symbol_table_frozen;
124 symbolS *abs_section_sym;
126 /* Remember the value of dot when parsing expressions. */
129 /* Relocs generated by ".reloc" pseudo. */
130 struct reloc_list* reloc_list;
132 void print_fixup (fixS *);
134 /* We generally attach relocs to frag chains. However, after we have
135 chained these all together into a segment, any relocs we add after
136 that must be attached to a segment. This will include relocs added
137 in md_estimate_size_for_relax, for example. */
138 static int frags_chained = 0;
142 #define RELOC_ENUM enum bfd_reloc_code_real
144 /* Create a fixS in obstack 'notes'. */
147 fix_new_internal (fragS *frag, /* Which frag? */
148 int where, /* Where in that frag? */
149 int size, /* 1, 2, or 4 usually. */
150 symbolS *add_symbol, /* X_add_symbol. */
151 symbolS *sub_symbol, /* X_op_symbol. */
152 offsetT offset, /* X_add_number. */
153 int pcrel, /* TRUE if PC-relative relocation. */
154 RELOC_ENUM r_type ATTRIBUTE_UNUSED /* Relocation type. */,
155 int at_beginning) /* Add to the start of the list? */
161 fixP = (fixS *) obstack_alloc (¬es, sizeof (fixS));
163 fixP->fx_frag = frag;
164 fixP->fx_where = where;
165 fixP->fx_size = size;
166 /* We've made fx_size a narrow field; check that it's wide enough. */
167 if (fixP->fx_size != size)
169 as_bad (_("field fx_size too small to hold %d"), size);
172 fixP->fx_addsy = add_symbol;
173 fixP->fx_subsy = sub_symbol;
174 fixP->fx_offset = offset;
175 fixP->fx_dot_value = dot_value;
176 fixP->fx_pcrel = pcrel;
177 fixP->fx_r_type = r_type;
178 fixP->fx_im_disp = 0;
179 fixP->fx_pcrel_adjust = 0;
180 fixP->fx_bit_fixP = 0;
181 fixP->fx_addnumber = 0;
185 fixP->fx_no_overflow = 0;
189 fixP->fx_cgen.insn = NULL;
190 fixP->fx_cgen.opinfo = 0;
194 TC_INIT_FIX_DATA (fixP);
197 as_where (&fixP->fx_file, &fixP->fx_line);
201 fixS **seg_fix_rootP = (frags_chained
202 ? &seg_info (now_seg)->fix_root
203 : &frchain_now->fix_root);
204 fixS **seg_fix_tailP = (frags_chained
205 ? &seg_info (now_seg)->fix_tail
206 : &frchain_now->fix_tail);
210 fixP->fx_next = *seg_fix_rootP;
211 *seg_fix_rootP = fixP;
212 if (fixP->fx_next == NULL)
213 *seg_fix_tailP = fixP;
217 fixP->fx_next = NULL;
219 (*seg_fix_tailP)->fx_next = fixP;
221 *seg_fix_rootP = fixP;
222 *seg_fix_tailP = fixP;
229 /* Create a fixup relative to a symbol (plus a constant). */
232 fix_new (fragS *frag, /* Which frag? */
233 int where, /* Where in that frag? */
234 int size, /* 1, 2, or 4 usually. */
235 symbolS *add_symbol, /* X_add_symbol. */
236 offsetT offset, /* X_add_number. */
237 int pcrel, /* TRUE if PC-relative relocation. */
238 RELOC_ENUM r_type /* Relocation type. */)
240 return fix_new_internal (frag, where, size, add_symbol,
241 (symbolS *) NULL, offset, pcrel, r_type, FALSE);
244 /* Create a fixup for an expression. Currently we only support fixups
245 for difference expressions. That is itself more than most object
246 file formats support anyhow. */
249 fix_new_exp (fragS *frag, /* Which frag? */
250 int where, /* Where in that frag? */
251 int size, /* 1, 2, or 4 usually. */
252 expressionS *exp, /* Expression. */
253 int pcrel, /* TRUE if PC-relative relocation. */
254 RELOC_ENUM r_type /* Relocation type. */)
266 as_bad (_("register value used as expression"));
270 /* This comes up when _GLOBAL_OFFSET_TABLE_+(.-L0) is read, if
271 the difference expression cannot immediately be reduced. */
273 symbolS *stmp = make_expr_symbol (exp);
275 exp->X_op = O_symbol;
276 exp->X_op_symbol = 0;
277 exp->X_add_symbol = stmp;
278 exp->X_add_number = 0;
280 return fix_new_exp (frag, where, size, exp, pcrel, r_type);
284 add = exp->X_add_symbol;
285 off = exp->X_add_number;
286 r_type = BFD_RELOC_RVA;
290 sub = exp->X_add_symbol;
291 off = exp->X_add_number;
295 sub = exp->X_op_symbol;
298 add = exp->X_add_symbol;
301 off = exp->X_add_number;
305 add = make_expr_symbol (exp);
309 return fix_new_internal (frag, where, size, add, sub, off, pcrel,
313 /* Create a fixup at the beginning of FRAG. The arguments are the same
314 as for fix_new, except that WHERE is implicitly 0. */
317 fix_at_start (fragS *frag, int size, symbolS *add_symbol,
318 offsetT offset, int pcrel, RELOC_ENUM r_type)
320 return fix_new_internal (frag, 0, size, add_symbol,
321 (symbolS *) NULL, offset, pcrel, r_type, TRUE);
324 /* Generic function to determine whether a fixup requires a relocation. */
326 generic_force_reloc (fixS *fix)
328 if (fix->fx_r_type == BFD_RELOC_VTABLE_INHERIT
329 || fix->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
332 if (fix->fx_addsy == NULL)
335 return S_FORCE_RELOC (fix->fx_addsy, fix->fx_subsy == NULL);
338 /* Append a string onto another string, bumping the pointer along. */
340 append (char **charPP, char *fromP, unsigned long length)
342 /* Don't trust memcpy() of 0 chars. */
346 memcpy (*charPP, fromP, length);
350 /* This routine records the largest alignment seen for each segment.
351 If the beginning of the segment is aligned on the worst-case
352 boundary, all of the other alignments within it will work. At
353 least one object format really uses this info. */
356 record_alignment (/* Segment to which alignment pertains. */
358 /* Alignment, as a power of 2 (e.g., 1 => 2-byte
359 boundary, 2 => 4-byte boundary, etc.) */
362 if (seg == absolute_section)
365 if ((unsigned int) align > bfd_get_section_alignment (stdoutput, seg))
366 bfd_set_section_alignment (stdoutput, seg, align);
370 get_recorded_alignment (segT seg)
372 if (seg == absolute_section)
375 return bfd_get_section_alignment (stdoutput, seg);
378 /* Reset the section indices after removing the gas created sections. */
381 renumber_sections (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *countparg)
383 int *countp = (int *) countparg;
385 sec->index = *countp;
390 chain_frchains_together_1 (segT section, struct frchain *frchp)
392 fragS dummy, *prev_frag = &dummy;
393 fixS fix_dummy, *prev_fix = &fix_dummy;
395 for (; frchp; frchp = frchp->frch_next)
397 prev_frag->fr_next = frchp->frch_root;
398 prev_frag = frchp->frch_last;
399 gas_assert (prev_frag->fr_type != 0);
400 if (frchp->fix_root != (fixS *) NULL)
402 if (seg_info (section)->fix_root == (fixS *) NULL)
403 seg_info (section)->fix_root = frchp->fix_root;
404 prev_fix->fx_next = frchp->fix_root;
405 seg_info (section)->fix_tail = frchp->fix_tail;
406 prev_fix = frchp->fix_tail;
409 gas_assert (prev_frag->fr_type != 0);
410 gas_assert (prev_frag != &dummy);
411 prev_frag->fr_next = 0;
416 chain_frchains_together (bfd *abfd ATTRIBUTE_UNUSED,
418 void *xxx ATTRIBUTE_UNUSED)
420 segment_info_type *info;
422 /* BFD may have introduced its own sections without using
423 subseg_new, so it is possible that seg_info is NULL. */
424 info = seg_info (section);
425 if (info != (segment_info_type *) NULL)
426 info->frchainP->frch_last
427 = chain_frchains_together_1 (section, info->frchainP);
429 /* Now that we've chained the frags together, we must add new fixups
430 to the segment, not to the frag chain. */
435 cvt_frag_to_fill (segT sec ATTRIBUTE_UNUSED, fragS *fragP)
437 switch (fragP->fr_type)
445 HANDLE_ALIGN (fragP);
447 know (fragP->fr_next != NULL);
448 fragP->fr_offset = (fragP->fr_next->fr_address
450 - fragP->fr_fix) / fragP->fr_var;
451 if (fragP->fr_offset < 0)
453 as_bad_where (fragP->fr_file, fragP->fr_line,
454 _("attempt to .org/.space backwards? (%ld)"),
455 (long) fragP->fr_offset);
456 fragP->fr_offset = 0;
458 fragP->fr_type = rs_fill;
466 valueT value = S_GET_VALUE (fragP->fr_symbol);
469 size = output_leb128 (fragP->fr_literal + fragP->fr_fix, value,
472 fragP->fr_fix += size;
473 fragP->fr_type = rs_fill;
475 fragP->fr_offset = 0;
476 fragP->fr_symbol = NULL;
481 eh_frame_convert_frag (fragP);
485 dwarf2dbg_convert_frag (fragP);
488 case rs_machine_dependent:
489 md_convert_frag (stdoutput, sec, fragP);
491 gas_assert (fragP->fr_next == NULL
492 || ((offsetT) (fragP->fr_next->fr_address - fragP->fr_address)
495 /* After md_convert_frag, we make the frag into a ".space 0".
496 md_convert_frag() should set up any fixSs and constants
501 #ifndef WORKING_DOT_WORD
504 struct broken_word *lie;
506 if (fragP->fr_subtype)
508 fragP->fr_fix += md_short_jump_size;
509 for (lie = (struct broken_word *) (fragP->fr_symbol);
510 lie && lie->dispfrag == fragP;
511 lie = lie->next_broken_word)
513 fragP->fr_fix += md_long_jump_size;
521 BAD_CASE (fragP->fr_type);
525 md_frag_check (fragP);
529 struct relax_seg_info
536 relax_seg (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *xxx)
538 segment_info_type *seginfo = seg_info (sec);
539 struct relax_seg_info *info = (struct relax_seg_info *) xxx;
541 if (seginfo && seginfo->frchainP
542 && relax_segment (seginfo->frchainP->frch_root, sec, info->pass))
547 size_seg (bfd *abfd, asection *sec, void *xxx ATTRIBUTE_UNUSED)
551 segment_info_type *seginfo;
553 valueT size, newsize;
555 subseg_change (sec, 0);
557 seginfo = seg_info (sec);
558 if (seginfo && seginfo->frchainP)
560 for (fragp = seginfo->frchainP->frch_root; fragp; fragp = fragp->fr_next)
561 cvt_frag_to_fill (sec, fragp);
562 for (fragp = seginfo->frchainP->frch_root;
564 fragp = fragp->fr_next)
565 /* Walk to last elt. */
567 size = fragp->fr_address + fragp->fr_fix;
572 flags = bfd_get_section_flags (abfd, sec);
573 if (size == 0 && bfd_get_section_size (sec) != 0 &&
574 (flags & SEC_HAS_CONTENTS) != 0)
577 if (size > 0 && ! seginfo->bss)
578 flags |= SEC_HAS_CONTENTS;
581 x = bfd_set_section_flags (abfd, sec, flags);
584 newsize = md_section_align (sec, size);
585 x = bfd_set_section_size (abfd, sec, newsize);
588 /* If the size had to be rounded up, add some padding in the last
590 gas_assert (newsize >= size);
593 fragS *last = seginfo->frchainP->frch_last;
594 fragp = seginfo->frchainP->frch_root;
595 while (fragp->fr_next != last)
596 fragp = fragp->fr_next;
597 last->fr_address = size;
598 if ((newsize - size) % fragp->fr_var == 0)
599 fragp->fr_offset += (newsize - size) / fragp->fr_var;
601 /* If we hit this abort, it's likely due to subsegs_finish not
602 providing sufficient alignment on the last frag, and the
603 machine dependent code using alignment frags with fr_var
608 #ifdef tc_frob_section
609 tc_frob_section (sec);
611 #ifdef obj_frob_section
612 obj_frob_section (sec);
618 dump_section_relocs (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, FILE *stream)
620 segment_info_type *seginfo = seg_info (sec);
621 fixS *fixp = seginfo->fix_root;
626 fprintf (stream, "sec %s relocs:\n", sec->name);
629 symbolS *s = fixp->fx_addsy;
631 fprintf (stream, " %08lx: type %d ", (unsigned long) fixp,
632 (int) fixp->fx_r_type);
634 fprintf (stream, "no sym\n");
637 print_symbol_value_1 (stream, s);
638 fprintf (stream, "\n");
640 fixp = fixp->fx_next;
644 #define dump_section_relocs(ABFD,SEC,STREAM) ((void) 0)
647 #ifndef EMIT_SECTION_SYMBOLS
648 #define EMIT_SECTION_SYMBOLS 1
651 /* Resolve U.A.OFFSET_SYM and U.A.SYM fields of RELOC_LIST entries,
652 and check for validity. Convert RELOC_LIST from using U.A fields
655 resolve_reloc_expr_symbols (void)
657 struct reloc_list *r;
659 for (r = reloc_list; r; r = r->next)
663 bfd_vma offset, addend;
665 reloc_howto_type *howto;
667 resolve_symbol_value (r->u.a.offset_sym);
668 symval = symbol_get_value_expression (r->u.a.offset_sym);
672 if (symval->X_op == O_constant)
673 sym = r->u.a.offset_sym;
674 else if (symval->X_op == O_symbol)
676 sym = symval->X_add_symbol;
677 offset = symval->X_add_number;
678 symval = symbol_get_value_expression (symval->X_add_symbol);
681 || symval->X_op != O_constant
682 || (sec = S_GET_SEGMENT (sym)) == NULL
683 || !SEG_NORMAL (sec))
685 as_bad_where (r->file, r->line, _("invalid offset expression"));
689 offset += S_GET_VALUE (sym);
692 addend = r->u.a.addend;
693 if (r->u.a.sym != NULL)
695 resolve_symbol_value (r->u.a.sym);
696 symval = symbol_get_value_expression (r->u.a.sym);
697 if (symval->X_op == O_constant)
699 else if (symval->X_op == O_symbol)
701 sym = symval->X_add_symbol;
702 addend += symval->X_add_number;
703 symval = symbol_get_value_expression (symval->X_add_symbol);
705 if (symval->X_op != O_constant)
707 as_bad_where (r->file, r->line, _("invalid reloc expression"));
710 else if (sym != NULL)
711 symbol_mark_used_in_reloc (sym);
715 if (abs_section_sym == NULL)
716 abs_section_sym = section_symbol (absolute_section);
717 sym = abs_section_sym;
720 howto = r->u.a.howto;
723 r->u.b.s = symbol_get_bfdsym (sym);
724 r->u.b.r.sym_ptr_ptr = &r->u.b.s;
725 r->u.b.r.address = offset;
726 r->u.b.r.addend = addend;
727 r->u.b.r.howto = howto;
731 /* This pass over fixups decides whether symbols can be replaced with
735 adjust_reloc_syms (bfd *abfd ATTRIBUTE_UNUSED,
737 void *xxx ATTRIBUTE_UNUSED)
739 segment_info_type *seginfo = seg_info (sec);
745 dump_section_relocs (abfd, sec, stderr);
747 for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next)
751 else if (fixp->fx_addsy)
757 fprintf (stderr, "\n\nadjusting fixup:\n");
761 sym = fixp->fx_addsy;
763 /* All symbols should have already been resolved at this
764 point. It is possible to see unresolved expression
765 symbols, though, since they are not in the regular symbol
767 resolve_symbol_value (sym);
769 if (fixp->fx_subsy != NULL)
770 resolve_symbol_value (fixp->fx_subsy);
772 /* If this symbol is equated to an undefined or common symbol,
773 convert the fixup to being against that symbol. */
774 while (symbol_equated_reloc_p (sym)
775 || S_IS_WEAKREFR (sym))
777 symbolS *newsym = symbol_get_value_expression (sym)->X_add_symbol;
780 fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number;
781 fixp->fx_addsy = newsym;
785 if (symbol_mri_common_p (sym))
787 fixp->fx_offset += S_GET_VALUE (sym);
788 fixp->fx_addsy = symbol_get_value_expression (sym)->X_add_symbol;
792 /* If the symbol is undefined, common, weak, or global (ELF
793 shared libs), we can't replace it with the section symbol. */
794 if (S_FORCE_RELOC (fixp->fx_addsy, 1))
797 /* Is there some other (target cpu dependent) reason we can't adjust
798 this one? (E.g. relocations involving function addresses on
800 #ifdef tc_fix_adjustable
801 if (! tc_fix_adjustable (fixp))
805 /* Since we're reducing to section symbols, don't attempt to reduce
806 anything that's already using one. */
807 if (symbol_section_p (sym))
810 symsec = S_GET_SEGMENT (sym);
814 if (bfd_is_abs_section (symsec))
816 /* The fixup_segment routine normally will not use this
817 symbol in a relocation. */
821 /* Don't try to reduce relocs which refer to non-local symbols
822 in .linkonce sections. It can lead to confusion when a
823 debugging section refers to a .linkonce section. I hope
824 this will always be correct. */
825 if (symsec != sec && ! S_IS_LOCAL (sym))
827 if ((symsec->flags & SEC_LINK_ONCE) != 0
829 /* The GNU toolchain uses an extension for ELF: a
830 section beginning with the magic string
831 .gnu.linkonce is a linkonce section. */
832 && strncmp (segment_name (symsec), ".gnu.linkonce",
833 sizeof ".gnu.linkonce" - 1) == 0))
837 /* Never adjust a reloc against local symbol in a merge section
838 with non-zero addend. */
839 if ((symsec->flags & SEC_MERGE) != 0
840 && (fixp->fx_offset != 0 || fixp->fx_subsy != NULL))
843 /* Never adjust a reloc against TLS local symbol. */
844 if ((symsec->flags & SEC_THREAD_LOCAL) != 0)
847 /* We refetch the segment when calling section_symbol, rather
848 than using symsec, because S_GET_VALUE may wind up changing
849 the section when it calls resolve_symbol_value. */
850 fixp->fx_offset += S_GET_VALUE (sym);
851 fixp->fx_addsy = section_symbol (S_GET_SEGMENT (sym));
853 fprintf (stderr, "\nadjusted fixup:\n");
858 dump_section_relocs (abfd, sec, stderr);
863 Go through all the fixS's in a segment and see which ones can be
864 handled now. (These consist of fixS where we have since discovered
865 the value of a symbol, or the address of the frag involved.)
866 For each one, call md_apply_fix to put the fix into the frag data.
868 Result is a count of how many relocation structs will be needed to
869 handle the remaining fixS's that we couldn't completely handle here.
870 These will be output later by emit_relocations(). */
873 fixup_segment (fixS *fixP, segT this_segment)
875 long seg_reloc_count = 0;
878 segT add_symbol_segment = absolute_section;
880 if (fixP != NULL && abs_section_sym == NULL)
881 abs_section_sym = section_symbol (absolute_section);
883 /* If the linker is doing the relaxing, we must not do any fixups.
885 Well, strictly speaking that's not true -- we could do any that
886 are PC-relative and don't cross regions that could change size.
887 And for the i960 we might be able to turn callx/callj into bal
888 anyways in cases where we know the maximum displacement. */
889 if (linkrelax && TC_LINKRELAX_FIXUP (this_segment))
891 for (; fixP; fixP = fixP->fx_next)
894 if (fixP->fx_addsy == NULL)
896 /* There was no symbol required by this relocation.
897 However, BFD doesn't really handle relocations
898 without symbols well. So fake up a local symbol in
899 the absolute section. */
900 fixP->fx_addsy = abs_section_sym;
902 symbol_mark_used_in_reloc (fixP->fx_addsy);
903 if (fixP->fx_subsy != NULL)
904 symbol_mark_used_in_reloc (fixP->fx_subsy);
907 TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count);
908 return seg_reloc_count;
911 for (; fixP; fixP = fixP->fx_next)
914 fprintf (stderr, "\nprocessing fixup:\n");
918 fragP = fixP->fx_frag;
920 #ifdef TC_VALIDATE_FIX
921 TC_VALIDATE_FIX (fixP, this_segment, skip);
923 add_number = fixP->fx_offset;
925 if (fixP->fx_addsy != NULL)
926 add_symbol_segment = S_GET_SEGMENT (fixP->fx_addsy);
928 if (fixP->fx_subsy != NULL)
930 segT sub_symbol_segment;
931 resolve_symbol_value (fixP->fx_subsy);
932 sub_symbol_segment = S_GET_SEGMENT (fixP->fx_subsy);
933 if (fixP->fx_addsy != NULL
934 && sub_symbol_segment == add_symbol_segment
935 && !TC_FORCE_RELOCATION_SUB_SAME (fixP, add_symbol_segment))
937 add_number += S_GET_VALUE (fixP->fx_addsy);
938 add_number -= S_GET_VALUE (fixP->fx_subsy);
939 fixP->fx_offset = add_number;
940 fixP->fx_addsy = NULL;
941 fixP->fx_subsy = NULL;
943 /* See the comment below about 68k weirdness. */
947 else if (sub_symbol_segment == absolute_section
948 && !TC_FORCE_RELOCATION_SUB_ABS (fixP, add_symbol_segment))
950 add_number -= S_GET_VALUE (fixP->fx_subsy);
951 fixP->fx_offset = add_number;
952 fixP->fx_subsy = NULL;
954 else if (sub_symbol_segment == this_segment
955 && !TC_FORCE_RELOCATION_SUB_LOCAL (fixP, add_symbol_segment))
957 add_number -= S_GET_VALUE (fixP->fx_subsy);
958 fixP->fx_offset = (add_number + fixP->fx_dot_value
959 + fixP->fx_frag->fr_address);
961 /* Make it pc-relative. If the back-end code has not
962 selected a pc-relative reloc, cancel the adjustment
963 we do later on all pc-relative relocs. */
966 /* Do this for m68k even if it's already described
967 as pc-relative. On the m68k, an operand of
968 "pc@(foo-.-2)" should address "foo" in a
973 add_number += MD_PCREL_FROM_SECTION (fixP, this_segment);
974 fixP->fx_subsy = NULL;
977 else if (!TC_VALIDATE_FIX_SUB (fixP, add_symbol_segment))
979 if (!md_register_arithmetic
980 && (add_symbol_segment == reg_section
981 || sub_symbol_segment == reg_section))
982 as_bad_where (fixP->fx_file, fixP->fx_line,
983 _("register value used as expression"));
985 as_bad_where (fixP->fx_file, fixP->fx_line,
986 _("can't resolve `%s' {%s section} - `%s' {%s section}"),
987 fixP->fx_addsy ? S_GET_NAME (fixP->fx_addsy) : "0",
988 segment_name (add_symbol_segment),
989 S_GET_NAME (fixP->fx_subsy),
990 segment_name (sub_symbol_segment));
996 if (add_symbol_segment == this_segment
997 && !TC_FORCE_RELOCATION_LOCAL (fixP))
999 /* This fixup was made when the symbol's segment was
1000 SEG_UNKNOWN, but it is now in the local segment.
1001 So we know how to do the address without relocation. */
1002 add_number += S_GET_VALUE (fixP->fx_addsy);
1003 fixP->fx_offset = add_number;
1005 add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment);
1006 fixP->fx_addsy = NULL;
1009 else if (add_symbol_segment == absolute_section
1010 && !TC_FORCE_RELOCATION_ABS (fixP))
1012 add_number += S_GET_VALUE (fixP->fx_addsy);
1013 fixP->fx_offset = add_number;
1014 fixP->fx_addsy = NULL;
1016 else if (add_symbol_segment != undefined_section
1017 && ! bfd_is_com_section (add_symbol_segment)
1018 && MD_APPLY_SYM_VALUE (fixP))
1019 add_number += S_GET_VALUE (fixP->fx_addsy);
1024 add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment);
1025 if (!fixP->fx_done && fixP->fx_addsy == NULL)
1027 /* There was no symbol required by this relocation.
1028 However, BFD doesn't really handle relocations
1029 without symbols well. So fake up a local symbol in
1030 the absolute section. */
1031 fixP->fx_addsy = abs_section_sym;
1036 md_apply_fix (fixP, &add_number, this_segment);
1041 if (fixP->fx_addsy == NULL)
1042 fixP->fx_addsy = abs_section_sym;
1043 symbol_mark_used_in_reloc (fixP->fx_addsy);
1044 if (fixP->fx_subsy != NULL)
1045 symbol_mark_used_in_reloc (fixP->fx_subsy);
1048 if (!fixP->fx_bit_fixP && !fixP->fx_no_overflow && fixP->fx_size != 0)
1050 if (fixP->fx_size < sizeof (valueT))
1055 mask--; /* Set all bits to one. */
1056 mask <<= fixP->fx_size * 8 - (fixP->fx_signed ? 1 : 0);
1057 if ((add_number & mask) != 0 && (add_number & mask) != mask)
1059 char buf[50], buf2[50];
1060 sprint_value (buf, fragP->fr_address + fixP->fx_where);
1061 if (add_number > 1000)
1062 sprint_value (buf2, add_number);
1064 sprintf (buf2, "%ld", (long) add_number);
1065 as_bad_where (fixP->fx_file, fixP->fx_line,
1066 _("value of %s too large for field of %d bytes at %s"),
1067 buf2, fixP->fx_size, buf);
1068 } /* Generic error checking. */
1070 #ifdef WARN_SIGNED_OVERFLOW_WORD
1071 /* Warn if a .word value is too large when treated as a signed
1072 number. We already know it is not too negative. This is to
1073 catch over-large switches generated by gcc on the 68k. */
1074 if (!flag_signed_overflow_ok
1075 && fixP->fx_size == 2
1076 && add_number > 0x7fff)
1077 as_bad_where (fixP->fx_file, fixP->fx_line,
1078 _("signed .word overflow; switch may be too large; %ld at 0x%lx"),
1080 (long) (fragP->fr_address + fixP->fx_where));
1082 } /* Not a bit fix. */
1084 #ifdef TC_VALIDATE_FIX
1085 skip: ATTRIBUTE_UNUSED_LABEL
1089 fprintf (stderr, "result:\n");
1092 } /* For each fixS in this segment. */
1094 TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count);
1095 return seg_reloc_count;
1099 fix_segment (bfd *abfd ATTRIBUTE_UNUSED,
1101 void *xxx ATTRIBUTE_UNUSED)
1103 segment_info_type *seginfo = seg_info (sec);
1105 fixup_segment (seginfo->fix_root, sec);
1109 install_reloc (asection *sec, arelent *reloc, fragS *fragp,
1110 char *file, unsigned int line)
1113 bfd_reloc_status_type s;
1116 if (reloc->sym_ptr_ptr != NULL
1117 && (sym = *reloc->sym_ptr_ptr) != NULL
1118 && (sym->flags & BSF_KEEP) == 0
1119 && ((sym->flags & BSF_SECTION_SYM) == 0
1120 || (EMIT_SECTION_SYMBOLS
1121 && !bfd_is_abs_section (sym->section))))
1122 as_bad_where (file, line, _("redefined symbol cannot be used on reloc"));
1124 s = bfd_install_relocation (stdoutput, reloc,
1125 fragp->fr_literal, fragp->fr_address,
1131 case bfd_reloc_overflow:
1132 as_bad_where (file, line, _("relocation overflow"));
1134 case bfd_reloc_outofrange:
1135 as_bad_where (file, line, _("relocation out of range"));
1138 as_fatal (_("%s:%u: bad return from bfd_install_relocation: %x"),
1144 write_relocs (bfd *abfd, asection *sec, void *xxx ATTRIBUTE_UNUSED)
1146 segment_info_type *seginfo = seg_info (sec);
1149 struct reloc_list *my_reloc_list, **rp, *r;
1153 /* If seginfo is NULL, we did not create this section; don't do
1154 anything with it. */
1155 if (seginfo == NULL)
1159 for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next)
1163 #ifdef RELOC_EXPANSION_POSSIBLE
1164 n *= MAX_RELOC_EXPANSION;
1167 /* Extract relocs for this section from reloc_list. */
1169 my_reloc_list = NULL;
1170 while ((r = *rp) != NULL)
1172 if (r->u.b.sec == sec)
1175 r->next = my_reloc_list;
1183 relocs = (arelent **) xcalloc (n, sizeof (arelent *));
1186 for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next)
1195 fx_size = fixp->fx_size;
1196 slack = TC_FX_SIZE_SLACK (fixp);
1198 fx_size = fx_size > slack ? fx_size - slack : 0;
1199 loc = fixp->fx_where + fx_size;
1200 if (slack >= 0 && loc > fixp->fx_frag->fr_fix)
1201 as_bad_where (fixp->fx_file, fixp->fx_line,
1202 _("internal error: fixup not contained within frag"));
1204 #ifndef RELOC_EXPANSION_POSSIBLE
1206 arelent *reloc = tc_gen_reloc (sec, fixp);
1210 relocs[i++] = reloc;
1215 arelent **reloc = tc_gen_reloc (sec, fixp);
1217 for (j = 0; reloc[j]; j++)
1218 relocs[i++] = reloc[j];
1222 for ( ; j != 0; --j)
1223 install_reloc (sec, relocs[i - j], fixp->fx_frag,
1224 fixp->fx_file, fixp->fx_line);
1230 unsigned int i, j, nsyms;
1232 sympp = bfd_get_outsymbols (stdoutput);
1233 nsyms = bfd_get_symcount (stdoutput);
1234 for (i = 0; i < n; i++)
1235 if (((*relocs[i]->sym_ptr_ptr)->flags & BSF_SECTION_SYM) == 0)
1237 for (j = 0; j < nsyms; j++)
1238 if (sympp[j] == *relocs[i]->sym_ptr_ptr)
1246 for (r = my_reloc_list; r != NULL; r = r->next)
1249 for (f = seginfo->frchainP->frch_root; f; f = f->fr_next)
1250 if (f->fr_address <= r->u.b.r.address
1251 && r->u.b.r.address < f->fr_address + f->fr_fix)
1254 as_bad_where (r->file, r->line,
1255 _("reloc not within (fixed part of) section"));
1258 relocs[n++] = &r->u.b.r;
1259 install_reloc (sec, &r->u.b.r, f, r->file, r->line);
1265 flagword flags = bfd_get_section_flags (abfd, sec);
1267 bfd_set_section_flags (abfd, sec, flags);
1268 bfd_set_reloc (stdoutput, sec, relocs, n);
1271 #ifdef SET_SECTION_RELOCS
1272 SET_SECTION_RELOCS (sec, relocs, n);
1280 fprintf (stderr, "relocs for sec %s\n", sec->name);
1281 for (i = 0; i < n; i++)
1284 s = *r->sym_ptr_ptr;
1285 fprintf (stderr, " reloc %2d @%p off %4lx : sym %-10s addend %lx\n",
1286 i, r, (unsigned long)r->address, s->name, (unsigned long)r->addend);
1293 compress_frag (struct z_stream_s *strm, const char *contents, int in_size,
1294 fragS **last_newf, struct obstack *ob)
1297 int total_out_size = 0;
1298 fragS *f = *last_newf;
1302 /* Call the compression routine repeatedly until it has finished
1303 processing the frag. */
1306 /* Reserve all the space available in the current chunk.
1307 If none is available, start a new frag. */
1308 avail_out = obstack_room (ob);
1311 obstack_finish (ob);
1312 f = frag_alloc (ob);
1313 f->fr_type = rs_fill;
1314 (*last_newf)->fr_next = f;
1316 avail_out = obstack_room (ob);
1319 as_fatal (_("can't extend frag"));
1320 next_out = obstack_next_free (ob);
1321 obstack_blank_fast (ob, avail_out);
1322 out_size = compress_data (strm, &contents, &in_size,
1323 &next_out, &avail_out);
1327 f->fr_fix += out_size;
1328 total_out_size += out_size;
1330 /* Return unused space. */
1332 obstack_blank_fast (ob, -avail_out);
1335 return total_out_size;
1339 compress_debug (bfd *abfd, asection *sec, void *xxx ATTRIBUTE_UNUSED)
1341 segment_info_type *seginfo = seg_info (sec);
1345 struct obstack *ob = &seginfo->frchainP->frch_obstack;
1346 bfd_size_type uncompressed_size = (bfd_size_type) sec->size;
1347 bfd_size_type compressed_size;
1348 const char *section_name;
1349 char *compressed_name;
1351 struct z_stream_s *strm;
1355 || !(bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS)
1356 || (bfd_get_section_flags (abfd, sec) & SEC_ALLOC))
1359 section_name = bfd_get_section_name (stdoutput, sec);
1360 if (strncmp (section_name, ".debug_", 7) != 0)
1363 strm = compress_init ();
1367 /* Create a new frag to contain the "ZLIB" header. */
1368 first_newf = frag_alloc (ob);
1369 if (obstack_room (ob) < 12)
1370 first_newf = frag_alloc (ob);
1371 if (obstack_room (ob) < 12)
1372 as_fatal (_("can't extend frag %u chars"), 12);
1373 last_newf = first_newf;
1374 obstack_blank_fast (ob, 12);
1375 last_newf->fr_type = rs_fill;
1376 last_newf->fr_fix = 12;
1377 header = last_newf->fr_literal;
1378 memcpy (header, "ZLIB", 4);
1379 header[11] = uncompressed_size; uncompressed_size >>= 8;
1380 header[10] = uncompressed_size; uncompressed_size >>= 8;
1381 header[9] = uncompressed_size; uncompressed_size >>= 8;
1382 header[8] = uncompressed_size; uncompressed_size >>= 8;
1383 header[7] = uncompressed_size; uncompressed_size >>= 8;
1384 header[6] = uncompressed_size; uncompressed_size >>= 8;
1385 header[5] = uncompressed_size; uncompressed_size >>= 8;
1386 header[4] = uncompressed_size;
1387 compressed_size = 12;
1389 /* Stream the frags through the compression engine, adding new frags
1390 as necessary to accomodate the compressed output. */
1391 for (f = seginfo->frchainP->frch_root;
1400 gas_assert (f->fr_type == rs_fill);
1403 out_size = compress_frag (strm, f->fr_literal, f->fr_fix,
1407 compressed_size += out_size;
1409 fill_literal = f->fr_literal + f->fr_fix;
1410 fill_size = f->fr_var;
1411 count = f->fr_offset;
1412 gas_assert (count >= 0);
1413 if (fill_size && count)
1417 out_size = compress_frag (strm, fill_literal, (int) fill_size,
1421 compressed_size += out_size;
1426 /* Flush the compression state. */
1433 /* Reserve all the space available in the current chunk.
1434 If none is available, start a new frag. */
1435 avail_out = obstack_room (ob);
1440 obstack_finish (ob);
1441 newf = frag_alloc (ob);
1442 newf->fr_type = rs_fill;
1443 last_newf->fr_next = newf;
1445 avail_out = obstack_room (ob);
1448 as_fatal (_("can't extend frag"));
1449 next_out = obstack_next_free (ob);
1450 obstack_blank_fast (ob, avail_out);
1451 x = compress_finish (strm, &next_out, &avail_out, &out_size);
1455 last_newf->fr_fix += out_size;
1456 compressed_size += out_size;
1458 /* Return unused space. */
1460 obstack_blank_fast (ob, -avail_out);
1466 /* Replace the uncompressed frag list with the compressed frag list. */
1467 seginfo->frchainP->frch_root = first_newf;
1468 seginfo->frchainP->frch_last = last_newf;
1470 /* Update the section size and its name. */
1471 x = bfd_set_section_size (abfd, sec, compressed_size);
1473 compressed_name = (char *) xmalloc (strlen (section_name) + 2);
1474 compressed_name[0] = '.';
1475 compressed_name[1] = 'z';
1476 strcpy (compressed_name + 2, section_name + 1);
1477 bfd_section_name (stdoutput, sec) = compressed_name;
1481 write_contents (bfd *abfd ATTRIBUTE_UNUSED,
1483 void *xxx ATTRIBUTE_UNUSED)
1485 segment_info_type *seginfo = seg_info (sec);
1486 addressT offset = 0;
1489 /* Write out the frags. */
1491 || !(bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS))
1494 for (f = seginfo->frchainP->frch_root;
1503 gas_assert (f->fr_type == rs_fill);
1506 x = bfd_set_section_contents (stdoutput, sec,
1507 f->fr_literal, (file_ptr) offset,
1508 (bfd_size_type) f->fr_fix);
1510 as_fatal (_("can't write %s: %s"), stdoutput->filename,
1511 bfd_errmsg (bfd_get_error ()));
1512 offset += f->fr_fix;
1514 fill_literal = f->fr_literal + f->fr_fix;
1515 fill_size = f->fr_var;
1516 count = f->fr_offset;
1517 gas_assert (count >= 0);
1518 if (fill_size && count)
1521 if (fill_size > sizeof (buf))
1523 /* Do it the old way. Can this ever happen? */
1526 x = bfd_set_section_contents (stdoutput, sec,
1529 (bfd_size_type) fill_size);
1531 as_fatal (_("can't write %s: %s"), stdoutput->filename,
1532 bfd_errmsg (bfd_get_error ()));
1533 offset += fill_size;
1538 /* Build a buffer full of fill objects and output it as
1539 often as necessary. This saves on the overhead of
1540 potentially lots of bfd_set_section_contents calls. */
1544 n_per_buf = sizeof (buf);
1545 memset (buf, *fill_literal, n_per_buf);
1550 n_per_buf = sizeof (buf) / fill_size;
1551 for (i = n_per_buf, bufp = buf; i; i--, bufp += fill_size)
1552 memcpy (bufp, fill_literal, fill_size);
1554 for (; count > 0; count -= n_per_buf)
1556 n_per_buf = n_per_buf > count ? count : n_per_buf;
1557 x = bfd_set_section_contents
1558 (stdoutput, sec, buf, (file_ptr) offset,
1559 (bfd_size_type) n_per_buf * fill_size);
1561 as_fatal (_("cannot write to output file"));
1562 offset += n_per_buf * fill_size;
1570 merge_data_into_text (void)
1572 seg_info (text_section)->frchainP->frch_last->fr_next =
1573 seg_info (data_section)->frchainP->frch_root;
1574 seg_info (text_section)->frchainP->frch_last =
1575 seg_info (data_section)->frchainP->frch_last;
1576 seg_info (data_section)->frchainP = 0;
1587 /* Count symbols. We can't rely on a count made by the loop in
1588 write_object_file, because *_frob_file may add a new symbol or
1591 for (symp = symbol_rootP; symp; symp = symbol_next (symp))
1597 bfd_size_type amt = (bfd_size_type) nsyms * sizeof (asymbol *);
1599 asympp = (asymbol **) bfd_alloc (stdoutput, amt);
1600 symp = symbol_rootP;
1601 for (i = 0; i < nsyms; i++, symp = symbol_next (symp))
1603 asympp[i] = symbol_get_bfdsym (symp);
1604 if (asympp[i]->flags != BSF_SECTION_SYM
1605 || !(bfd_is_const_section (asympp[i]->section)
1606 && asympp[i]->section->symbol == asympp[i]))
1607 asympp[i]->flags |= BSF_KEEP;
1608 symbol_mark_written (symp);
1613 result = bfd_set_symtab (stdoutput, asympp, nsyms);
1614 gas_assert (result);
1615 symbol_table_frozen = 1;
1618 /* Finish the subsegments. After every sub-segment, we fake an
1619 ".align ...". This conforms to BSD4.2 brane-damage. We then fake
1620 ".fill 0" because that is the kind of frag that requires least
1621 thought. ".align" frags like to have a following frag since that
1622 makes calculating their intended length trivial. */
1624 #ifndef SUB_SEGMENT_ALIGN
1626 /* The last subsegment gets an alignment corresponding to the alignment
1627 of the section. This allows proper nop-filling at the end of
1628 code-bearing sections. */
1629 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) \
1630 (!(FRCHAIN)->frch_next ? get_recorded_alignment (SEG) : 0)
1632 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
1637 subsegs_finish (void)
1639 struct frchain *frchainP;
1642 for (s = stdoutput->sections; s; s = s->next)
1644 segment_info_type *seginfo = seg_info (s);
1648 for (frchainP = seginfo->frchainP;
1650 frchainP = frchainP->frch_next)
1654 subseg_set (s, frchainP->frch_subseg);
1656 /* This now gets called even if we had errors. In that case,
1657 any alignment is meaningless, and, moreover, will look weird
1658 if we are generating a listing. */
1661 alignment = SUB_SEGMENT_ALIGN (now_seg, frchainP);
1662 if ((bfd_get_section_flags (now_seg->owner, now_seg) & SEC_MERGE)
1663 && now_seg->entsize)
1665 unsigned int entsize = now_seg->entsize;
1668 while ((entsize & 1) == 0)
1673 if (entalign > alignment)
1674 alignment = entalign;
1678 if (subseg_text_p (now_seg))
1679 frag_align_code (alignment, 0);
1681 frag_align (alignment, 0, 0);
1683 /* frag_align will have left a new frag.
1684 Use this last frag for an empty ".fill".
1686 For this segment ...
1687 Create a last frag. Do not leave a "being filled in frag". */
1688 frag_wane (frag_now);
1689 frag_now->fr_fix = 0;
1690 know (frag_now->fr_next == NULL);
1695 /* Write the object file. */
1698 write_object_file (void)
1700 struct relax_seg_info rsi;
1701 #ifndef WORKING_DOT_WORD
1702 fragS *fragP; /* Track along all frags. */
1705 /* Do we really want to write it? */
1707 int n_warns, n_errs;
1708 n_warns = had_warnings ();
1709 n_errs = had_errors ();
1710 /* The -Z flag indicates that an object file should be generated,
1711 regardless of warnings and errors. */
1712 if (flag_always_generate_output)
1714 if (n_warns || n_errs)
1715 as_warn (_("%d error%s, %d warning%s, generating bad object file"),
1716 n_errs, n_errs == 1 ? "" : "s",
1717 n_warns, n_warns == 1 ? "" : "s");
1722 as_fatal (_("%d error%s, %d warning%s, no object file generated"),
1723 n_errs, n_errs == 1 ? "" : "s",
1724 n_warns, n_warns == 1 ? "" : "s");
1729 /* Under VMS we try to be compatible with VAX-11 "C". Thus, we call
1730 a routine to check for the definition of the procedure "_main",
1731 and if so -- fix it up so that it can be program entry point. */
1732 vms_check_for_main ();
1733 #endif /* OBJ_VMS */
1735 /* From now on, we don't care about sub-segments. Build one frag chain
1736 for each segment. Linked thru fr_next. */
1738 /* Remove the sections created by gas for its own purposes. */
1742 bfd_section_list_remove (stdoutput, reg_section);
1743 bfd_section_list_remove (stdoutput, expr_section);
1744 stdoutput->section_count -= 2;
1746 bfd_map_over_sections (stdoutput, renumber_sections, &i);
1749 bfd_map_over_sections (stdoutput, chain_frchains_together, (char *) 0);
1751 /* We have two segments. If user gave -R flag, then we must put the
1752 data frags into the text segment. Do this before relaxing so
1753 we know to take advantage of -R and make shorter addresses. */
1754 if (flag_readonly_data_in_text)
1756 merge_data_into_text ();
1762 #ifndef WORKING_DOT_WORD
1763 /* We need to reset the markers in the broken word list and
1764 associated frags between calls to relax_segment (via
1765 relax_seg). Since the broken word list is global, we do it
1766 once per round, rather than locally in relax_segment for each
1768 struct broken_word *brokp;
1770 for (brokp = broken_words;
1771 brokp != (struct broken_word *) NULL;
1772 brokp = brokp->next_broken_word)
1776 if (brokp->dispfrag != (fragS *) NULL
1777 && brokp->dispfrag->fr_type == rs_broken_word)
1778 brokp->dispfrag->fr_subtype = 0;
1783 bfd_map_over_sections (stdoutput, relax_seg, &rsi);
1789 /* Note - Most ports will use the default value of
1790 TC_FINALIZE_SYMS_BEFORE_SIZE_SEG, which 1. This will force
1791 local symbols to be resolved, removing their frag information.
1792 Some ports however, will not have finished relaxing all of
1793 their frags and will still need the local symbol frag
1794 information. These ports can set
1795 TC_FINALIZE_SYMS_BEFORE_SIZE_SEG to 0. */
1796 finalize_syms = TC_FINALIZE_SYMS_BEFORE_SIZE_SEG;
1798 bfd_map_over_sections (stdoutput, size_seg, (char *) 0);
1800 /* Relaxation has completed. Freeze all syms. */
1803 #ifdef md_post_relax_hook
1807 #ifndef WORKING_DOT_WORD
1809 struct broken_word *lie;
1810 struct broken_word **prevP;
1812 prevP = &broken_words;
1813 for (lie = broken_words; lie; lie = lie->next_broken_word)
1818 subseg_change (lie->seg, lie->subseg);
1819 exp.X_op = O_subtract;
1820 exp.X_add_symbol = lie->add;
1821 exp.X_op_symbol = lie->sub;
1822 exp.X_add_number = lie->addnum;
1823 #ifdef TC_CONS_FIX_NEW
1824 TC_CONS_FIX_NEW (lie->frag,
1825 lie->word_goes_here - lie->frag->fr_literal,
1828 fix_new_exp (lie->frag,
1829 lie->word_goes_here - lie->frag->fr_literal,
1830 2, &exp, 0, BFD_RELOC_16);
1832 *prevP = lie->next_broken_word;
1835 prevP = &(lie->next_broken_word);
1837 for (lie = broken_words; lie;)
1839 struct broken_word *untruth;
1841 addressT table_addr;
1842 addressT from_addr, to_addr;
1845 subseg_change (lie->seg, lie->subseg);
1846 fragP = lie->dispfrag;
1848 /* Find out how many broken_words go here. */
1851 untruth && untruth->dispfrag == fragP;
1852 untruth = untruth->next_broken_word)
1853 if (untruth->added == 1)
1856 table_ptr = lie->dispfrag->fr_opcode;
1857 table_addr = (lie->dispfrag->fr_address
1858 + (table_ptr - lie->dispfrag->fr_literal));
1859 /* Create the jump around the long jumps. This is a short
1860 jump from table_ptr+0 to table_ptr+n*long_jump_size. */
1861 from_addr = table_addr;
1862 to_addr = table_addr + md_short_jump_size + n * md_long_jump_size;
1863 md_create_short_jump (table_ptr, from_addr, to_addr, lie->dispfrag,
1865 table_ptr += md_short_jump_size;
1866 table_addr += md_short_jump_size;
1869 lie && lie->dispfrag == fragP;
1870 m++, lie = lie->next_broken_word)
1872 if (lie->added == 2)
1874 /* Patch the jump table. */
1875 for (untruth = (struct broken_word *) (fragP->fr_symbol);
1876 untruth && untruth->dispfrag == fragP;
1877 untruth = untruth->next_broken_word)
1879 if (untruth->use_jump == lie)
1881 /* This is the offset from ??? to table_ptr+0.
1882 The target is the same for all users of this
1883 md_long_jump, but the "sub" bases (and hence the
1884 offsets) may be different. */
1885 addressT to_word = table_addr - S_GET_VALUE (untruth->sub);
1886 #ifdef TC_CHECK_ADJUSTED_BROKEN_DOT_WORD
1887 TC_CHECK_ADJUSTED_BROKEN_DOT_WORD (to_word, untruth);
1889 md_number_to_chars (untruth->word_goes_here, to_word, 2);
1893 /* Install the long jump. */
1894 /* This is a long jump from table_ptr+0 to the final target. */
1895 from_addr = table_addr;
1896 to_addr = S_GET_VALUE (lie->add) + lie->addnum;
1897 md_create_long_jump (table_ptr, from_addr, to_addr, lie->dispfrag,
1899 table_ptr += md_long_jump_size;
1900 table_addr += md_long_jump_size;
1904 #endif /* not WORKING_DOT_WORD */
1906 /* Resolve symbol values. This needs to be done before processing
1912 for (symp = symbol_rootP; symp; symp = symbol_next (symp))
1913 resolve_symbol_value (symp);
1915 resolve_local_symbol_values ();
1916 resolve_reloc_expr_symbols ();
1920 #ifdef tc_frob_file_before_adjust
1921 tc_frob_file_before_adjust ();
1923 #ifdef obj_frob_file_before_adjust
1924 obj_frob_file_before_adjust ();
1927 bfd_map_over_sections (stdoutput, adjust_reloc_syms, (char *) 0);
1929 #ifdef tc_frob_file_before_fix
1930 tc_frob_file_before_fix ();
1932 #ifdef obj_frob_file_before_fix
1933 obj_frob_file_before_fix ();
1936 bfd_map_over_sections (stdoutput, fix_segment, (char *) 0);
1938 /* Set up symbol table, and write it out. */
1942 bfd_boolean skip_next_symbol = FALSE;
1944 for (symp = symbol_rootP; symp; symp = symbol_next (symp))
1949 if (skip_next_symbol)
1951 /* Don't do anything besides moving the value of the
1952 symbol from the GAS value-field to the BFD value-field. */
1953 symbol_get_bfdsym (symp)->value = S_GET_VALUE (symp);
1954 skip_next_symbol = FALSE;
1958 if (symbol_mri_common_p (symp))
1960 if (S_IS_EXTERNAL (symp))
1961 as_bad (_("%s: global symbols not supported in common sections"),
1963 symbol_remove (symp, &symbol_rootP, &symbol_lastP);
1967 name = S_GET_NAME (symp);
1971 decode_local_label_name ((char *) S_GET_NAME (symp));
1972 /* They only differ if `name' is a fb or dollar local
1974 if (name2 != name && ! S_IS_DEFINED (symp))
1975 as_bad (_("local label `%s' is not defined"), name2);
1978 /* Do it again, because adjust_reloc_syms might introduce
1979 more symbols. They'll probably only be section symbols,
1980 but they'll still need to have the values computed. */
1981 resolve_symbol_value (symp);
1983 /* Skip symbols which were equated to undefined or common
1985 if (symbol_equated_reloc_p (symp)
1986 || S_IS_WEAKREFR (symp))
1988 const char *sname = S_GET_NAME (symp);
1990 if (S_IS_COMMON (symp)
1991 && !TC_FAKE_LABEL (sname)
1992 && !S_IS_WEAKREFR (symp)
1993 && (!S_IS_EXTERNAL (symp) || S_IS_LOCAL (symp)))
1995 expressionS *e = symbol_get_value_expression (symp);
1997 as_bad (_("Local symbol `%s' can't be equated to common symbol `%s'"),
1998 sname, S_GET_NAME (e->X_add_symbol));
2000 if (S_GET_SEGMENT (symp) == reg_section)
2002 /* Report error only if we know the symbol name. */
2003 if (S_GET_NAME (symp) != reg_section->name)
2004 as_bad (_("can't make global register symbol `%s'"),
2007 symbol_remove (symp, &symbol_rootP, &symbol_lastP);
2011 #ifdef obj_frob_symbol
2012 obj_frob_symbol (symp, punt);
2014 #ifdef tc_frob_symbol
2015 if (! punt || symbol_used_in_reloc_p (symp))
2016 tc_frob_symbol (symp, punt);
2019 /* If we don't want to keep this symbol, splice it out of
2020 the chain now. If EMIT_SECTION_SYMBOLS is 0, we never
2021 want section symbols. Otherwise, we skip local symbols
2022 and symbols that the frob_symbol macros told us to punt,
2023 but we keep such symbols if they are used in relocs. */
2024 if (symp == abs_section_sym
2025 || (! EMIT_SECTION_SYMBOLS
2026 && symbol_section_p (symp))
2027 /* Note that S_IS_EXTERNAL and S_IS_LOCAL are not always
2028 opposites. Sometimes the former checks flags and the
2029 latter examines the name... */
2030 || (!S_IS_EXTERNAL (symp)
2031 && (punt || S_IS_LOCAL (symp) ||
2032 (S_IS_WEAKREFD (symp) && ! symbol_used_p (symp)))
2033 && ! symbol_used_in_reloc_p (symp)))
2035 symbol_remove (symp, &symbol_rootP, &symbol_lastP);
2037 /* After symbol_remove, symbol_next(symp) still returns
2038 the one that came after it in the chain. So we don't
2039 need to do any extra cleanup work here. */
2043 /* Make sure we really got a value for the symbol. */
2044 if (! symbol_resolved_p (symp))
2046 as_bad (_("can't resolve value for symbol `%s'"),
2048 symbol_mark_resolved (symp);
2051 /* Set the value into the BFD symbol. Up til now the value
2052 has only been kept in the gas symbolS struct. */
2053 symbol_get_bfdsym (symp)->value = S_GET_VALUE (symp);
2055 /* A warning construct is a warning symbol followed by the
2056 symbol warned about. Don't let anything object-format or
2057 target-specific muck with it; it's ready for output. */
2058 if (symbol_get_bfdsym (symp)->flags & BSF_WARNING)
2059 skip_next_symbol = TRUE;
2065 /* Now do any format-specific adjustments to the symbol table, such
2066 as adding file symbols. */
2067 #ifdef tc_adjust_symtab
2068 tc_adjust_symtab ();
2070 #ifdef obj_adjust_symtab
2071 obj_adjust_symtab ();
2074 /* Stop if there is an error. */
2078 /* Now that all the sizes are known, and contents correct, we can
2079 start writing to the file. */
2082 /* If *_frob_file changes the symbol value at this point, it is
2083 responsible for moving the changed value into symp->bsym->value
2084 as well. Hopefully all symbol value changing can be done in
2089 #ifdef obj_frob_file
2092 #ifdef obj_coff_generate_pdata
2093 obj_coff_generate_pdata ();
2095 bfd_map_over_sections (stdoutput, write_relocs, (char *) 0);
2097 #ifdef tc_frob_file_after_relocs
2098 tc_frob_file_after_relocs ();
2100 #ifdef obj_frob_file_after_relocs
2101 obj_frob_file_after_relocs ();
2104 /* Once all relocations have been written, we can compress the
2105 contents of the debug sections. This needs to be done before
2106 we start writing any sections, because it will affect the file
2107 layout, which is fixed once we start writing contents. */
2108 if (flag_compress_debug)
2109 bfd_map_over_sections (stdoutput, compress_debug, (char *) 0);
2111 bfd_map_over_sections (stdoutput, write_contents, (char *) 0);
2114 #ifdef TC_GENERIC_RELAX_TABLE
2115 /* Relax a fragment by scanning TC_GENERIC_RELAX_TABLE. */
2118 relax_frag (segT segment, fragS *fragP, long stretch)
2120 const relax_typeS *this_type;
2121 const relax_typeS *start_type;
2122 relax_substateT next_state;
2123 relax_substateT this_state;
2129 const relax_typeS *table;
2131 target = fragP->fr_offset;
2132 address = fragP->fr_address;
2133 table = TC_GENERIC_RELAX_TABLE;
2134 this_state = fragP->fr_subtype;
2135 start_type = this_type = table + this_state;
2136 symbolP = fragP->fr_symbol;
2142 sym_frag = symbol_get_frag (symbolP);
2144 #ifndef DIFF_EXPR_OK
2145 know (sym_frag != NULL);
2147 know (S_GET_SEGMENT (symbolP) != absolute_section
2148 || sym_frag == &zero_address_frag);
2149 target += S_GET_VALUE (symbolP);
2151 /* If SYM_FRAG has yet to be reached on this pass, assume it
2152 will move by STRETCH just as we did, unless there is an
2153 alignment frag between here and SYM_FRAG. An alignment may
2154 well absorb any STRETCH, and we don't want to choose a larger
2155 branch insn by overestimating the needed reach of this
2156 branch. It isn't critical to calculate TARGET exactly; We
2157 know we'll be doing another pass if STRETCH is non-zero. */
2160 && sym_frag->relax_marker != fragP->relax_marker
2161 && S_GET_SEGMENT (symbolP) == segment)
2164 || sym_frag->region == fragP->region)
2166 /* If we get here we know we have a forward branch. This
2167 relax pass may have stretched previous instructions so
2168 far that omitting STRETCH would make the branch
2169 negative. Don't allow this in case the negative reach is
2170 large enough to require a larger branch instruction. */
2171 else if (target < address)
2172 target = fragP->fr_next->fr_address + stretch;
2176 aim = target - address - fragP->fr_fix;
2177 #ifdef TC_PCREL_ADJUST
2178 /* Currently only the ns32k family needs this. */
2179 aim += TC_PCREL_ADJUST (fragP);
2182 #ifdef md_prepare_relax_scan
2183 /* Formerly called M68K_AIM_KLUDGE. */
2184 md_prepare_relax_scan (fragP, address, aim, this_state, this_type);
2189 /* Look backwards. */
2190 for (next_state = this_type->rlx_more; next_state;)
2191 if (aim >= this_type->rlx_backward)
2195 /* Grow to next state. */
2196 this_state = next_state;
2197 this_type = table + this_state;
2198 next_state = this_type->rlx_more;
2203 /* Look forwards. */
2204 for (next_state = this_type->rlx_more; next_state;)
2205 if (aim <= this_type->rlx_forward)
2209 /* Grow to next state. */
2210 this_state = next_state;
2211 this_type = table + this_state;
2212 next_state = this_type->rlx_more;
2216 growth = this_type->rlx_length - start_type->rlx_length;
2218 fragP->fr_subtype = this_state;
2222 #endif /* defined (TC_GENERIC_RELAX_TABLE) */
2224 /* Relax_align. Advance location counter to next address that has 'alignment'
2225 lowest order bits all 0s, return size of adjustment made. */
2226 static relax_addressT
2227 relax_align (register relax_addressT address, /* Address now. */
2228 register int alignment /* Alignment (binary). */)
2230 relax_addressT mask;
2231 relax_addressT new_address;
2233 mask = ~((~0) << alignment);
2234 new_address = (address + mask) & (~mask);
2235 #ifdef LINKER_RELAXING_SHRINKS_ONLY
2237 /* We must provide lots of padding, so the linker can discard it
2238 when needed. The linker will not add extra space, ever. */
2239 new_address += (1 << alignment);
2241 return (new_address - address);
2244 /* Now we have a segment, not a crowd of sub-segments, we can make
2249 After this, all frags in this segment have addresses that are correct
2250 within the segment. Since segments live in different file addresses,
2251 these frag addresses may not be the same as final object-file
2255 relax_segment (struct frag *segment_frag_root, segT segment, int pass)
2257 unsigned long frag_count;
2259 relax_addressT address;
2263 /* In case md_estimate_size_before_relax() wants to make fixSs. */
2264 subseg_change (segment, 0);
2266 /* For each frag in segment: count and store (a 1st guess of)
2270 for (frag_count = 0, fragP = segment_frag_root;
2272 fragP = fragP->fr_next, frag_count ++)
2274 fragP->region = region;
2275 fragP->relax_marker = 0;
2276 fragP->fr_address = address;
2277 address += fragP->fr_fix;
2279 switch (fragP->fr_type)
2282 address += fragP->fr_offset * fragP->fr_var;
2289 addressT offset = relax_align (address, (int) fragP->fr_offset);
2291 if (fragP->fr_subtype != 0 && offset > fragP->fr_subtype)
2294 if (offset % fragP->fr_var != 0)
2296 as_bad_where (fragP->fr_file, fragP->fr_line,
2297 _("alignment padding (%lu bytes) not a multiple of %ld"),
2298 (unsigned long) offset, (long) fragP->fr_var);
2299 offset -= (offset % fragP->fr_var);
2308 /* Assume .org is nugatory. It will grow with 1st relax. */
2315 case rs_machine_dependent:
2316 /* If fr_symbol is an expression, this call to
2317 resolve_symbol_value sets up the correct segment, which will
2318 likely be needed in md_estimate_size_before_relax. */
2319 if (fragP->fr_symbol)
2320 resolve_symbol_value (fragP->fr_symbol);
2322 address += md_estimate_size_before_relax (fragP, segment);
2325 #ifndef WORKING_DOT_WORD
2326 /* Broken words don't concern us yet. */
2327 case rs_broken_word:
2332 /* Initial guess is always 1; doing otherwise can result in
2333 stable solutions that are larger than the minimum. */
2334 address += fragP->fr_offset = 1;
2338 address += eh_frame_estimate_size_before_relax (fragP);
2342 address += dwarf2dbg_estimate_size_before_relax (fragP);
2346 BAD_CASE (fragP->fr_type);
2353 unsigned long max_iterations;
2355 /* Cumulative address adjustment. */
2358 /* Have we made any adjustment this pass? We can't just test
2359 stretch because one piece of code may have grown and another
2363 /* Most horrible, but gcc may give us some exception data that
2364 is impossible to assemble, of the form
2368 .uleb128 end - start
2374 If the leb128 is two bytes in size, then end-start is 128*128,
2375 which requires a three byte leb128. If the leb128 is three
2376 bytes in size, then end-start is 128*128-1, which requires a
2377 two byte leb128. We work around this dilemma by inserting
2378 an extra 4 bytes of alignment just after the .align. This
2379 works because the data after the align is accessed relative to
2382 This counter is used in a tiny state machine to detect
2383 whether a leb128 followed by an align is impossible to
2385 int rs_leb128_fudge = 0;
2387 /* We want to prevent going into an infinite loop where one frag grows
2388 depending upon the location of a symbol which is in turn moved by
2389 the growing frag. eg:
2395 So we dictate that this algorithm can be at most O2. */
2396 max_iterations = frag_count * frag_count;
2397 /* Check for overflow. */
2398 if (max_iterations < frag_count)
2399 max_iterations = frag_count;
2407 for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next)
2410 addressT was_address;
2414 fragP->relax_marker ^= 1;
2415 was_address = fragP->fr_address;
2416 address = fragP->fr_address += stretch;
2417 symbolP = fragP->fr_symbol;
2418 offset = fragP->fr_offset;
2420 switch (fragP->fr_type)
2422 case rs_fill: /* .fill never relaxes. */
2426 #ifndef WORKING_DOT_WORD
2427 /* JF: This is RMS's idea. I do *NOT* want to be blamed
2428 for it I do not want to write it. I do not want to have
2429 anything to do with it. This is not the proper way to
2430 implement this misfeature. */
2431 case rs_broken_word:
2433 struct broken_word *lie;
2434 struct broken_word *untruth;
2436 /* Yes this is ugly (storing the broken_word pointer
2437 in the symbol slot). Still, this whole chunk of
2438 code is ugly, and I don't feel like doing anything
2439 about it. Think of it as stubbornness in action. */
2441 for (lie = (struct broken_word *) (fragP->fr_symbol);
2442 lie && lie->dispfrag == fragP;
2443 lie = lie->next_broken_word)
2449 offset = (S_GET_VALUE (lie->add)
2451 - S_GET_VALUE (lie->sub));
2452 if (offset <= -32768 || offset >= 32767)
2454 if (flag_warn_displacement)
2457 sprint_value (buf, (addressT) lie->addnum);
2458 as_warn_where (fragP->fr_file, fragP->fr_line,
2459 _(".word %s-%s+%s didn't fit"),
2460 S_GET_NAME (lie->add),
2461 S_GET_NAME (lie->sub),
2464 if (fragP->fr_subtype == 0)
2466 fragP->fr_subtype++;
2467 growth += md_short_jump_size;
2470 /* Redirect *all* words of this table with the same
2471 target, lest we have to handle the case where the
2472 same target but with a offset that fits on this
2473 round overflows at the next relaxation round. */
2474 for (untruth = (struct broken_word *) (fragP->fr_symbol);
2475 untruth && untruth->dispfrag == lie->dispfrag;
2476 untruth = untruth->next_broken_word)
2477 if ((symbol_get_frag (untruth->add)
2478 == symbol_get_frag (lie->add))
2479 && (S_GET_VALUE (untruth->add)
2480 == S_GET_VALUE (lie->add)))
2483 untruth->use_jump = lie;
2487 growth += md_long_jump_size;
2492 } /* case rs_broken_word */
2498 addressT oldoff, newoff;
2500 oldoff = relax_align (was_address + fragP->fr_fix,
2502 newoff = relax_align (address + fragP->fr_fix,
2505 if (fragP->fr_subtype != 0)
2507 if (oldoff > fragP->fr_subtype)
2509 if (newoff > fragP->fr_subtype)
2513 growth = newoff - oldoff;
2515 /* If this align happens to follow a leb128 and
2516 we have determined that the leb128 is bouncing
2517 in size, then break the cycle by inserting an
2520 && (rs_leb128_fudge & 16) != 0
2521 && (rs_leb128_fudge & 15) >= 2)
2523 segment_info_type *seginfo = seg_info (segment);
2524 struct obstack *ob = &seginfo->frchainP->frch_obstack;
2527 newf = frag_alloc (ob);
2528 obstack_blank_fast (ob, fragP->fr_var);
2529 obstack_finish (ob);
2530 memcpy (newf, fragP, SIZEOF_STRUCT_FRAG);
2531 memcpy (newf->fr_literal,
2532 fragP->fr_literal + fragP->fr_fix,
2534 newf->fr_type = rs_fill;
2535 newf->fr_address = address + fragP->fr_fix + newoff;
2537 newf->fr_offset = (((offsetT) 1 << fragP->fr_offset)
2539 if (newf->fr_offset * newf->fr_var
2540 != (offsetT) 1 << fragP->fr_offset)
2542 newf->fr_offset = (offsetT) 1 << fragP->fr_offset;
2545 /* Include size of new frag in GROWTH. */
2546 growth += newf->fr_offset * newf->fr_var;
2547 /* Adjust the new frag address for the amount
2548 we'll add when we process the new frag. */
2549 newf->fr_address -= stretch + growth;
2550 newf->relax_marker ^= 1;
2551 fragP->fr_next = newf;
2553 as_warn (_("padding added"));
2561 addressT target = offset;
2566 /* Convert from an actual address to an octet offset
2567 into the section. Here it is assumed that the
2568 section's VMA is zero, and can omit subtracting it
2569 from the symbol's value to get the address offset. */
2570 know (S_GET_SEGMENT (symbolP)->vma == 0);
2571 target += S_GET_VALUE (symbolP) * OCTETS_PER_BYTE;
2574 know (fragP->fr_next);
2575 after = fragP->fr_next->fr_address + stretch;
2576 growth = target - after;
2581 /* Don't error on first few frag relax passes.
2582 The symbol might be an expression involving
2583 symbol values from other sections. If those
2584 sections have not yet been processed their
2585 frags will all have zero addresses, so we
2586 will calculate incorrect values for them. The
2587 number of passes we allow before giving an
2588 error is somewhat arbitrary. It should be at
2589 least one, with larger values requiring
2590 increasingly contrived dependencies between
2591 frags to trigger a false error. */
2594 /* Force another pass. */
2599 /* Growth may be negative, but variable part of frag
2600 cannot have fewer than 0 chars. That is, we can't
2602 as_bad_where (fragP->fr_file, fragP->fr_line,
2603 _("attempt to move .org backwards"));
2605 /* We've issued an error message. Change the
2606 frag to avoid cascading errors. */
2607 fragP->fr_type = rs_align;
2608 fragP->fr_subtype = 0;
2609 fragP->fr_offset = 0;
2610 fragP->fr_fix = after - address;
2621 amount = S_GET_VALUE (symbolP);
2622 if (S_GET_SEGMENT (symbolP) != absolute_section
2623 || S_IS_COMMON (symbolP)
2624 || ! S_IS_DEFINED (symbolP))
2626 as_bad_where (fragP->fr_file, fragP->fr_line,
2627 _(".space specifies non-absolute value"));
2628 /* Prevent repeat of this error message. */
2629 fragP->fr_symbol = 0;
2631 else if (amount < 0)
2633 /* Don't error on first few frag relax passes.
2634 See rs_org comment for a longer explanation. */
2641 as_warn_where (fragP->fr_file, fragP->fr_line,
2642 _(".space or .fill with negative value, ignored"));
2643 fragP->fr_symbol = 0;
2646 growth = (was_address + fragP->fr_fix + amount
2647 - fragP->fr_next->fr_address);
2651 case rs_machine_dependent:
2652 #ifdef md_relax_frag
2653 growth = md_relax_frag (segment, fragP, stretch);
2655 #ifdef TC_GENERIC_RELAX_TABLE
2656 /* The default way to relax a frag is to look through
2657 TC_GENERIC_RELAX_TABLE. */
2658 growth = relax_frag (segment, fragP, stretch);
2659 #endif /* TC_GENERIC_RELAX_TABLE */
2668 value = resolve_symbol_value (fragP->fr_symbol);
2669 size = sizeof_leb128 (value, fragP->fr_subtype);
2670 growth = size - fragP->fr_offset;
2671 fragP->fr_offset = size;
2676 growth = eh_frame_relax_frag (fragP);
2680 growth = dwarf2dbg_relax_frag (fragP);
2684 BAD_CASE (fragP->fr_type);
2691 if (fragP->fr_type == rs_leb128)
2692 rs_leb128_fudge += 16;
2693 else if (fragP->fr_type == rs_align
2694 && (rs_leb128_fudge & 16) != 0
2696 rs_leb128_fudge += 16;
2698 rs_leb128_fudge = 0;
2703 && (rs_leb128_fudge & 16) == 0
2704 && (rs_leb128_fudge & -16) != 0)
2705 rs_leb128_fudge += 1;
2707 rs_leb128_fudge = 0;
2709 /* Until nothing further to relax. */
2710 while (stretched && -- max_iterations);
2713 as_fatal (_("Infinite loop encountered whilst attempting to compute the addresses of symbols in section %s"),
2714 segment_name (segment));
2717 for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next)
2718 if (fragP->last_fr_address != fragP->fr_address)
2720 fragP->last_fr_address = fragP->fr_address;
2727 number_to_chars_bigendian (char *buf, valueT val, int n)
2733 buf[n] = val & 0xff;
2739 number_to_chars_littleendian (char *buf, valueT val, int n)
2745 *buf++ = val & 0xff;
2751 write_print_statistics (FILE *file)
2753 fprintf (file, "fixups: %d\n", n_fixups);
2756 /* For debugging. */
2757 extern int indent_level;
2760 print_fixup (fixS *fixp)
2763 fprintf (stderr, "fix ");
2764 fprintf_vma (stderr, (bfd_vma)((bfd_hostptr_t) fixp));
2765 fprintf (stderr, " %s:%d",fixp->fx_file, fixp->fx_line);
2767 fprintf (stderr, " pcrel");
2768 if (fixp->fx_pcrel_adjust)
2769 fprintf (stderr, " pcrel_adjust=%d", fixp->fx_pcrel_adjust);
2770 if (fixp->fx_im_disp)
2773 fprintf (stderr, " im_disp=%d", fixp->fx_im_disp);
2775 fprintf (stderr, " im_disp");
2779 fprintf (stderr, " tcbit");
2781 fprintf (stderr, " done");
2782 fprintf (stderr, "\n size=%d frag=", fixp->fx_size);
2783 fprintf_vma (stderr, (bfd_vma) ((bfd_hostptr_t) fixp->fx_frag));
2784 fprintf (stderr, " where=%ld offset=%lx addnumber=%lx",
2785 (long) fixp->fx_where,
2786 (unsigned long) fixp->fx_offset,
2787 (unsigned long) fixp->fx_addnumber);
2788 fprintf (stderr, "\n %s (%d)", bfd_get_reloc_code_name (fixp->fx_r_type),
2792 fprintf (stderr, "\n +<");
2793 print_symbol_value_1 (stderr, fixp->fx_addsy);
2794 fprintf (stderr, ">");
2798 fprintf (stderr, "\n -<");
2799 print_symbol_value_1 (stderr, fixp->fx_subsy);
2800 fprintf (stderr, ">");
2802 fprintf (stderr, "\n");
2803 #ifdef TC_FIX_DATA_PRINT
2804 TC_FIX_DATA_PRINT (stderr, fixp);