1 /* write.c - emit .o file
2 Copyright (C) 1986, 87, 90, 91, 92, 93, 94, 95, 96, 97, 98, 1999
3 Free Software Foundation, Inc.
5 This file is part of GAS, the GNU Assembler.
7 GAS is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GAS is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GAS; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
22 /* This thing should be set up to do byteordering correctly. But... */
27 #include "output-file.h"
29 /* This looks like a good idea. Let's try turning it on always, for now. */
30 #undef BFD_FAST_SECTION_FILL
31 #define BFD_FAST_SECTION_FILL
33 /* The NOP_OPCODE is for the alignment fill value. Fill it with a nop
34 instruction so that the disassembler does not choke on it. */
36 #define NOP_OPCODE 0x00
39 #ifndef TC_ADJUST_RELOC_COUNT
40 #define TC_ADJUST_RELOC_COUNT(FIXP,COUNT)
43 #ifndef TC_FORCE_RELOCATION
44 #define TC_FORCE_RELOCATION(FIXP) 0
47 #ifndef TC_FORCE_RELOCATION_SECTION
48 #define TC_FORCE_RELOCATION_SECTION(FIXP,SEG) TC_FORCE_RELOCATION(FIXP)
51 #ifndef MD_PCREL_FROM_SECTION
52 #define MD_PCREL_FROM_SECTION(FIXP, SEC) md_pcrel_from(FIXP)
55 #ifndef WORKING_DOT_WORD
56 extern CONST int md_short_jump_size;
57 extern CONST int md_long_jump_size;
60 int symbol_table_frozen;
61 void print_fixup PARAMS ((fixS *));
64 static void renumber_sections PARAMS ((bfd *, asection *, PTR));
66 /* We generally attach relocs to frag chains. However, after we have
67 chained these all together into a segment, any relocs we add after
68 that must be attached to a segment. This will include relocs added
69 in md_estimate_size_for_relax, for example. */
70 static int frags_chained = 0;
76 struct frag *text_frag_root;
77 struct frag *data_frag_root;
78 struct frag *bss_frag_root;
80 struct frag *text_last_frag; /* Last frag in segment. */
81 struct frag *data_last_frag; /* Last frag in segment. */
82 static struct frag *bss_last_frag; /* Last frag in segment. */
86 static object_headers headers;
89 long string_byte_count;
90 char *next_object_file_charP; /* Tracks object file bytes. */
93 int magic_number_for_object_file = DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE;
96 #endif /* BFD_ASSEMBLER */
101 static fixS *fix_new_internal PARAMS ((fragS *, int where, int size,
102 symbolS *add, symbolS *sub,
103 offsetT offset, int pcrel,
104 bfd_reloc_code_real_type r_type));
106 static fixS *fix_new_internal PARAMS ((fragS *, int where, int size,
107 symbolS *add, symbolS *sub,
108 offsetT offset, int pcrel,
111 #if defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS))
112 static long fixup_segment PARAMS ((fixS * fixP, segT this_segment_type));
114 static relax_addressT relax_align PARAMS ((relax_addressT addr, int align));
115 #if defined (BFD_ASSEMBLER) || ! defined (BFD)
116 static fragS *chain_frchains_together_1 PARAMS ((segT, struct frchain *));
119 static void chain_frchains_together PARAMS ((bfd *, segT, PTR));
120 static void cvt_frag_to_fill PARAMS ((segT, fragS *));
121 static void relax_and_size_seg PARAMS ((bfd *, asection *, PTR));
122 static void adjust_reloc_syms PARAMS ((bfd *, asection *, PTR));
123 static void write_relocs PARAMS ((bfd *, asection *, PTR));
124 static void write_contents PARAMS ((bfd *, asection *, PTR));
125 static void set_symtab PARAMS ((void));
127 #if defined (BFD_ASSEMBLER) || (! defined (BFD) && ! defined (OBJ_AOUT))
128 static void merge_data_into_text PARAMS ((void));
130 #if ! defined (BFD_ASSEMBLER) && ! defined (BFD)
131 static void cvt_frag_to_fill PARAMS ((object_headers *, segT, fragS *));
132 static void remove_subsegs PARAMS ((frchainS *, int, fragS **, fragS **));
133 static void relax_and_size_all_segments PARAMS ((void));
139 * Create a fixS in obstack 'notes'.
142 fix_new_internal (frag, where, size, add_symbol, sub_symbol, offset, pcrel,
144 fragS *frag; /* Which frag? */
145 int where; /* Where in that frag? */
146 int size; /* 1, 2, or 4 usually. */
147 symbolS *add_symbol; /* X_add_symbol. */
148 symbolS *sub_symbol; /* X_op_symbol. */
149 offsetT offset; /* X_add_number. */
150 int pcrel; /* TRUE if PC-relative relocation. */
152 bfd_reloc_code_real_type r_type; /* Relocation type */
154 int r_type; /* Relocation type */
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_pcrel = pcrel;
177 #if defined(NEED_FX_R_TYPE) || defined (BFD_ASSEMBLER)
178 fixP->fx_r_type = r_type;
180 fixP->fx_im_disp = 0;
181 fixP->fx_pcrel_adjust = 0;
182 fixP->fx_bit_fixP = 0;
183 fixP->fx_addnumber = 0;
186 fixP->fx_no_overflow = 0;
190 fixP->fx_cgen.insn = NULL;
191 fixP->fx_cgen.opinfo = 0;
195 TC_INIT_FIX_DATA(fixP);
198 as_where (&fixP->fx_file, &fixP->fx_line);
200 /* Usually, we want relocs sorted numerically, but while
201 comparing to older versions of gas that have relocs
202 reverse sorted, it is convenient to have this compile
203 time option. xoxorich. */
208 fixS **seg_fix_rootP = (frags_chained
209 ? &seg_info (now_seg)->fix_root
210 : &frchain_now->fix_root);
211 fixS **seg_fix_tailP = (frags_chained
212 ? &seg_info (now_seg)->fix_tail
213 : &frchain_now->fix_tail);
216 #ifdef REVERSE_SORT_RELOCS
218 fixP->fx_next = *seg_fix_rootP;
219 *seg_fix_rootP = fixP;
221 #else /* REVERSE_SORT_RELOCS */
223 fixP->fx_next = NULL;
226 (*seg_fix_tailP)->fx_next = fixP;
228 *seg_fix_rootP = fixP;
229 *seg_fix_tailP = fixP;
231 #endif /* REVERSE_SORT_RELOCS */
238 /* Create a fixup relative to a symbol (plus a constant). */
241 fix_new (frag, where, size, add_symbol, offset, pcrel, r_type)
242 fragS *frag; /* Which frag? */
243 int where; /* Where in that frag? */
244 int size; /* 1, 2, or 4 usually. */
245 symbolS *add_symbol; /* X_add_symbol. */
246 offsetT offset; /* X_add_number. */
247 int pcrel; /* TRUE if PC-relative relocation. */
249 bfd_reloc_code_real_type r_type; /* Relocation type */
251 int r_type; /* Relocation type */
254 return fix_new_internal (frag, where, size, add_symbol,
255 (symbolS *) NULL, offset, pcrel, r_type);
258 /* Create a fixup for an expression. Currently we only support fixups
259 for difference expressions. That is itself more than most object
260 file formats support anyhow. */
263 fix_new_exp (frag, where, size, exp, pcrel, r_type)
264 fragS *frag; /* Which frag? */
265 int where; /* Where in that frag? */
266 int size; /* 1, 2, or 4 usually. */
267 expressionS *exp; /* Expression. */
268 int pcrel; /* TRUE if PC-relative relocation. */
270 bfd_reloc_code_real_type r_type; /* Relocation type */
272 int r_type; /* Relocation type */
285 /* This comes up when _GLOBAL_OFFSET_TABLE_+(.-L0) is read, if
286 the difference expression cannot immediately be reduced. */
288 symbolS *stmp = make_expr_symbol (exp);
289 exp->X_op = O_symbol;
290 exp->X_op_symbol = 0;
291 exp->X_add_symbol = stmp;
292 exp->X_add_number = 0;
293 return fix_new_exp (frag, where, size, exp, pcrel, r_type);
297 add = exp->X_add_symbol;
298 off = exp->X_add_number;
300 #if defined(BFD_ASSEMBLER)
301 r_type = BFD_RELOC_RVA;
303 #if defined(TC_RVA_RELOC)
304 r_type = TC_RVA_RELOC;
306 as_fatal(_("rva not supported"));
312 sub = exp->X_add_symbol;
313 off = exp->X_add_number;
317 sub = exp->X_op_symbol;
320 add = exp->X_add_symbol;
323 off = exp->X_add_number;
327 add = make_expr_symbol (exp);
331 return fix_new_internal (frag, where, size, add, sub, off,
335 /* Append a string onto another string, bumping the pointer along. */
337 append (charPP, fromP, length)
340 unsigned long length;
342 /* Don't trust memcpy() of 0 chars. */
346 memcpy (*charPP, fromP, length);
350 #ifndef BFD_ASSEMBLER
351 int section_alignment[SEG_MAXIMUM_ORDINAL];
355 * This routine records the largest alignment seen for each segment.
356 * If the beginning of the segment is aligned on the worst-case
357 * boundary, all of the other alignments within it will work. At
358 * least one object format really uses this info.
361 record_alignment (seg, align)
362 /* Segment to which alignment pertains */
364 /* Alignment, as a power of 2 (e.g., 1 => 2-byte boundary, 2 => 4-byte
368 if (seg == absolute_section)
371 if ((unsigned int) align > bfd_get_section_alignment (stdoutput, seg))
372 bfd_set_section_alignment (stdoutput, seg, align);
374 if (align > section_alignment[(int) seg])
375 section_alignment[(int) seg] = align;
381 /* Reset the section indices after removing the gas created sections. */
384 renumber_sections (abfd, sec, countparg)
389 int *countp = (int *) countparg;
391 sec->index = *countp;
395 #endif /* defined (BFD_ASSEMBLER) */
397 #if defined (BFD_ASSEMBLER) || ! defined (BFD)
400 chain_frchains_together_1 (section, frchp)
402 struct frchain *frchp;
404 fragS dummy, *prev_frag = &dummy;
406 fixS fix_dummy, *prev_fix = &fix_dummy;
409 for (; frchp && frchp->frch_seg == section; frchp = frchp->frch_next)
411 prev_frag->fr_next = frchp->frch_root;
412 prev_frag = frchp->frch_last;
413 assert (prev_frag->fr_type != 0);
415 if (frchp->fix_root != (fixS *) NULL)
417 if (seg_info (section)->fix_root == (fixS *) NULL)
418 seg_info (section)->fix_root = frchp->fix_root;
419 prev_fix->fx_next = frchp->fix_root;
420 seg_info (section)->fix_tail = frchp->fix_tail;
421 prev_fix = frchp->fix_tail;
425 assert (prev_frag->fr_type != 0);
426 prev_frag->fr_next = 0;
435 chain_frchains_together (abfd, section, xxx)
436 bfd *abfd; /* unused */
438 PTR xxx; /* unused */
440 segment_info_type *info;
442 /* BFD may have introduced its own sections without using
443 subseg_new, so it is possible that seg_info is NULL. */
444 info = seg_info (section);
445 if (info != (segment_info_type *) NULL)
446 info->frchainP->frch_last
447 = chain_frchains_together_1 (section, info->frchainP);
449 /* Now that we've chained the frags together, we must add new fixups
450 to the segment, not to the frag chain. */
456 #if !defined (BFD) && !defined (BFD_ASSEMBLER)
459 remove_subsegs (head, seg, root, last)
465 *root = head->frch_root;
466 *last = chain_frchains_together_1 (seg, head);
471 #if defined (BFD_ASSEMBLER) || !defined (BFD)
475 cvt_frag_to_fill (sec, fragP)
480 cvt_frag_to_fill (headersP, sec, fragP)
481 object_headers *headersP;
486 switch (fragP->fr_type)
493 HANDLE_ALIGN (fragP);
495 know (fragP->fr_next != NULL);
496 fragP->fr_offset = (fragP->fr_next->fr_address
498 - fragP->fr_fix) / fragP->fr_var;
499 if (fragP->fr_offset < 0)
501 as_bad (_("attempt to .org/.space backwards? (%ld)"),
502 (long) fragP->fr_offset);
504 fragP->fr_type = rs_fill;
512 valueT value = S_GET_VALUE (fragP->fr_symbol);
515 size = output_leb128 (fragP->fr_literal + fragP->fr_fix, value,
518 fragP->fr_fix += size;
519 fragP->fr_type = rs_fill;
521 fragP->fr_offset = 0;
522 fragP->fr_symbol = NULL;
527 eh_frame_convert_frag (fragP);
530 case rs_machine_dependent:
532 md_convert_frag (stdoutput, sec, fragP);
534 md_convert_frag (headersP, sec, fragP);
537 assert (fragP->fr_next == NULL
538 || ((offsetT) (fragP->fr_next->fr_address - fragP->fr_address)
542 * After md_convert_frag, we make the frag into a ".space 0".
543 * Md_convert_frag() should set up any fixSs and constants
549 #ifndef WORKING_DOT_WORD
552 struct broken_word *lie;
554 if (fragP->fr_subtype)
556 fragP->fr_fix += md_short_jump_size;
557 for (lie = (struct broken_word *) (fragP->fr_symbol);
558 lie && lie->dispfrag == fragP;
559 lie = lie->next_broken_word)
561 fragP->fr_fix += md_long_jump_size;
569 BAD_CASE (fragP->fr_type);
574 #endif /* defined (BFD_ASSEMBLER) || !defined (BFD) */
578 relax_and_size_seg (abfd, sec, xxx)
585 segment_info_type *seginfo;
587 valueT size, newsize;
589 subseg_change (sec, 0);
591 flags = bfd_get_section_flags (abfd, sec);
593 seginfo = seg_info (sec);
594 if (seginfo && seginfo->frchainP)
596 relax_segment (seginfo->frchainP->frch_root, sec);
597 for (fragp = seginfo->frchainP->frch_root; fragp; fragp = fragp->fr_next)
598 cvt_frag_to_fill (sec, fragp);
599 for (fragp = seginfo->frchainP->frch_root;
601 fragp = fragp->fr_next)
602 /* walk to last elt */;
603 size = fragp->fr_address + fragp->fr_fix;
608 if (size > 0 && ! seginfo->bss)
609 flags |= SEC_HAS_CONTENTS;
611 /* @@ This is just an approximation. */
612 if (seginfo && seginfo->fix_root)
616 x = bfd_set_section_flags (abfd, sec, flags);
619 newsize = md_section_align (sec, size);
620 x = bfd_set_section_size (abfd, sec, newsize);
623 /* If the size had to be rounded up, add some padding in the last
625 assert (newsize >= size);
628 fragS *last = seginfo->frchainP->frch_last;
629 fragp = seginfo->frchainP->frch_root;
630 while (fragp->fr_next != last)
631 fragp = fragp->fr_next;
632 last->fr_address = size;
633 fragp->fr_offset += newsize - size;
636 #ifdef tc_frob_section
637 tc_frob_section (sec);
639 #ifdef obj_frob_section
640 obj_frob_section (sec);
646 dump_section_relocs (abfd, sec, stream_)
651 FILE *stream = (FILE *) stream_;
652 segment_info_type *seginfo = seg_info (sec);
653 fixS *fixp = seginfo->fix_root;
658 fprintf (stream, "sec %s relocs:\n", sec->name);
661 symbolS *s = fixp->fx_addsy;
664 fprintf (stream, " %08x: %s(%s", fixp, S_GET_NAME (s),
665 s->bsym->section->name);
666 if (s->bsym->flags & BSF_SECTION_SYM)
668 fprintf (stream, " section sym");
670 fprintf (stream, "+%x", S_GET_VALUE (s));
673 fprintf (stream, "+%x", S_GET_VALUE (s));
674 fprintf (stream, ")+%x\n", fixp->fx_offset);
677 fprintf (stream, " %08x: type %d no sym\n", fixp, fixp->fx_r_type);
678 fixp = fixp->fx_next;
682 #define dump_section_relocs(ABFD,SEC,STREAM) ((void) 0)
685 #ifndef EMIT_SECTION_SYMBOLS
686 #define EMIT_SECTION_SYMBOLS 1
690 adjust_reloc_syms (abfd, sec, xxx)
695 segment_info_type *seginfo = seg_info (sec);
701 dump_section_relocs (abfd, sec, stderr);
703 for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next)
706 else if (fixp->fx_addsy)
712 fprintf (stderr, "\n\nadjusting fixup:\n");
716 sym = fixp->fx_addsy;
718 /* All symbols should have already been resolved at this
719 point. It is possible to see unresolved expression
720 symbols, though, since they are not in the regular symbol
723 resolve_symbol_value (sym, 1);
725 if (fixp->fx_subsy != NULL)
726 resolve_symbol_value (fixp->fx_subsy, 1);
728 /* If this symbol is equated to an undefined symbol, convert
729 the fixup to being against that symbol. */
730 if (sym != NULL && symbol_equated_p (sym)
731 && (! S_IS_DEFINED (sym) || S_IS_COMMON (sym)))
733 fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number;
734 sym = symbol_get_value_expression (sym)->X_add_symbol;
735 fixp->fx_addsy = sym;
738 if (sym != NULL && symbol_mri_common_p (sym))
740 /* These symbols are handled specially in fixup_segment. */
744 symsec = S_GET_SEGMENT (sym);
749 if (bfd_is_abs_section (symsec))
751 /* The fixup_segment routine will not use this symbol in a
752 relocation unless TC_FORCE_RELOCATION returns 1. */
753 if (TC_FORCE_RELOCATION (fixp))
755 symbol_mark_used_in_reloc (fixp->fx_addsy);
756 #ifdef UNDEFINED_DIFFERENCE_OK
757 if (fixp->fx_subsy != NULL)
758 symbol_mark_used_in_reloc (fixp->fx_subsy);
764 /* If it's one of these sections, assume the symbol is
765 definitely going to be output. The code in
766 md_estimate_size_before_relax in tc-mips.c uses this test
767 as well, so if you change this code you should look at that
769 if (bfd_is_und_section (symsec)
770 || bfd_is_com_section (symsec))
772 symbol_mark_used_in_reloc (fixp->fx_addsy);
773 #ifdef UNDEFINED_DIFFERENCE_OK
774 /* We have the difference of an undefined symbol and some
775 other symbol. Make sure to mark the other symbol as used
776 in a relocation so that it will always be output. */
778 symbol_mark_used_in_reloc (fixp->fx_subsy);
783 /* Don't try to reduce relocs which refer to .linkonce
784 sections. It can lead to confusion when a debugging
785 section refers to a .linkonce section. I hope this will
786 always be correct. */
793 if ((bfd_get_section_flags (stdoutput, symsec) & SEC_LINK_ONCE)
798 /* The GNU toolchain uses an extension for ELF: a section
799 beginning with the magic string .gnu.linkonce is a
801 if (strncmp (segment_name (symsec), ".gnu.linkonce",
802 sizeof ".gnu.linkonce" - 1) == 0)
808 symbol_mark_used_in_reloc (fixp->fx_addsy);
809 #ifdef UNDEFINED_DIFFERENCE_OK
810 if (fixp->fx_subsy != NULL)
811 symbol_mark_used_in_reloc (fixp->fx_subsy);
817 /* Since we're reducing to section symbols, don't attempt to reduce
818 anything that's already using one. */
819 if (symbol_section_p (sym))
821 symbol_mark_used_in_reloc (fixp->fx_addsy);
826 /* We can never adjust a reloc against a weak symbol. If we
827 did, and the weak symbol was overridden by a real symbol
828 somewhere else, then our relocation would be pointing at
829 the wrong area of memory. */
832 symbol_mark_used_in_reloc (fixp->fx_addsy);
837 /* Is there some other reason we can't adjust this one? (E.g.,
838 call/bal links in i960-bout symbols.) */
839 #ifdef obj_fix_adjustable
840 if (! obj_fix_adjustable (fixp))
842 symbol_mark_used_in_reloc (fixp->fx_addsy);
847 /* Is there some other (target cpu dependent) reason we can't adjust
848 this one? (E.g. relocations involving function addresses on
850 #ifdef tc_fix_adjustable
851 if (! tc_fix_adjustable (fixp))
853 symbol_mark_used_in_reloc (fixp->fx_addsy);
858 /* If the section symbol isn't going to be output, the relocs
859 at least should still work. If not, figure out what to do
860 when we run into that case.
862 We refetch the segment when calling section_symbol, rather
863 than using symsec, because S_GET_VALUE may wind up changing
864 the section when it calls resolve_symbol_value. */
865 fixp->fx_offset += S_GET_VALUE (sym);
866 fixp->fx_addsy = section_symbol (S_GET_SEGMENT (sym));
867 symbol_mark_used_in_reloc (fixp->fx_addsy);
872 #if 1/*def RELOC_REQUIRES_SYMBOL*/
875 /* There was no symbol required by this relocation. However,
876 BFD doesn't really handle relocations without symbols well.
877 (At least, the COFF support doesn't.) So for now we fake up
878 a local symbol in the absolute section. */
880 fixp->fx_addsy = section_symbol (absolute_section);
881 /* fixp->fx_addsy->sy_used_in_reloc = 1; */
885 dump_section_relocs (abfd, sec, stderr);
889 write_relocs (abfd, sec, xxx)
894 segment_info_type *seginfo = seg_info (sec);
901 /* If seginfo is NULL, we did not create this section; don't do
906 fixup_segment (seginfo->fix_root, sec);
909 for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next)
912 #ifndef RELOC_EXPANSION_POSSIBLE
913 /* Set up reloc information as well. */
914 relocs = (arelent **) xmalloc (n * sizeof (arelent *));
915 memset ((char*)relocs, 0, n * sizeof (arelent*));
918 for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next)
921 bfd_reloc_status_type s;
930 /* If this is an undefined symbol which was equated to another
931 symbol, then use generate the reloc against the latter symbol
932 rather than the former. */
933 sym = fixp->fx_addsy;
934 while (symbol_equated_p (sym)
935 && (! S_IS_DEFINED (sym) || S_IS_COMMON (sym)))
939 /* We must avoid looping, as that can occur with a badly
941 n = symbol_get_value_expression (sym)->X_add_symbol;
944 fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number;
947 fixp->fx_addsy = sym;
949 reloc = tc_gen_reloc (sec, fixp);
957 /* This test is triggered inappropriately for the SH. */
958 if (fixp->fx_where + fixp->fx_size
959 > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset)
963 s = bfd_install_relocation (stdoutput, reloc,
964 fixp->fx_frag->fr_literal,
965 fixp->fx_frag->fr_address,
971 case bfd_reloc_overflow:
972 as_bad_where (fixp->fx_file, fixp->fx_line, _("relocation overflow"));
974 case bfd_reloc_outofrange:
975 as_bad_where (fixp->fx_file, fixp->fx_line, _("relocation out of range"));
978 as_fatal (_("%s:%u: bad return from bfd_install_relocation: %x"),
979 fixp->fx_file, fixp->fx_line, s);
984 n = n * MAX_RELOC_EXPANSION;
985 /* Set up reloc information as well. */
986 relocs = (arelent **) xmalloc (n * sizeof (arelent *));
989 for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next)
993 bfd_reloc_status_type s;
1003 /* If this is an undefined symbol which was equated to another
1004 symbol, then use generate the reloc against the latter symbol
1005 rather than the former. */
1006 sym = fixp->fx_addsy;
1007 while (symbol_equated_p (sym)
1008 && (! S_IS_DEFINED (sym) || S_IS_COMMON (sym)))
1009 sym = symbol_get_value_expression (sym)->X_add_symbol;
1010 fixp->fx_addsy = sym;
1012 reloc = tc_gen_reloc (sec, fixp);
1014 for (j = 0; reloc[j]; j++)
1016 relocs[i++] = reloc[j];
1019 data = fixp->fx_frag->fr_literal + fixp->fx_where;
1020 if (fixp->fx_where + fixp->fx_size
1021 > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset)
1022 as_bad_where (fixp->fx_file, fixp->fx_line,
1023 _("internal error: fixup not contained within frag"));
1024 for (j = 0; reloc[j]; j++)
1026 s = bfd_install_relocation (stdoutput, reloc[j],
1027 fixp->fx_frag->fr_literal,
1028 fixp->fx_frag->fr_address,
1034 case bfd_reloc_overflow:
1035 as_bad_where (fixp->fx_file, fixp->fx_line,
1036 _("relocation overflow"));
1039 as_fatal (_("%s:%u: bad return from bfd_install_relocation"),
1040 fixp->fx_file, fixp->fx_line);
1051 sympp = bfd_get_outsymbols (stdoutput);
1052 nsyms = bfd_get_symcount (stdoutput);
1053 for (i = 0; i < n; i++)
1054 if (((*relocs[i]->sym_ptr_ptr)->flags & BSF_SECTION_SYM) == 0)
1056 for (j = 0; j < nsyms; j++)
1057 if (sympp[j] == *relocs[i]->sym_ptr_ptr)
1066 bfd_set_reloc (stdoutput, sec, relocs, n);
1068 bfd_set_section_flags (abfd, sec,
1069 (bfd_get_section_flags (abfd, sec)
1070 & (flagword) ~SEC_RELOC));
1077 fprintf (stderr, "relocs for sec %s\n", sec->name);
1078 for (i = 0; i < n; i++)
1081 s = *r->sym_ptr_ptr;
1082 fprintf (stderr, " reloc %2d @%08x off %4x : sym %-10s addend %x\n",
1083 i, r, r->address, s->name, r->addend);
1090 write_contents (abfd, sec, xxx)
1095 segment_info_type *seginfo = seg_info (sec);
1096 unsigned long offset = 0;
1099 /* Write out the frags. */
1101 || ! (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS))
1104 for (f = seginfo->frchainP->frch_root;
1109 unsigned long fill_size;
1113 assert (f->fr_type == rs_fill);
1116 x = bfd_set_section_contents (stdoutput, sec,
1117 f->fr_literal, (file_ptr) offset,
1118 (bfd_size_type) f->fr_fix);
1121 bfd_perror (stdoutput->filename);
1122 as_perror (_("FATAL: Can't write %s"), stdoutput->filename);
1123 exit (EXIT_FAILURE);
1125 offset += f->fr_fix;
1127 fill_literal = f->fr_literal + f->fr_fix;
1128 fill_size = f->fr_var;
1129 count = f->fr_offset;
1130 assert (count >= 0);
1131 if (fill_size && count)
1134 if (fill_size > sizeof(buf))
1136 /* Do it the old way. Can this ever happen? */
1139 x = bfd_set_section_contents (stdoutput, sec,
1142 (bfd_size_type) fill_size);
1145 bfd_perror (stdoutput->filename);
1146 as_perror (_("FATAL: Can't write %s"), stdoutput->filename);
1147 exit (EXIT_FAILURE);
1149 offset += fill_size;
1154 /* Build a buffer full of fill objects and output it as
1155 often as necessary. This saves on the overhead of
1156 potentially lots of bfd_set_section_contents calls. */
1160 n_per_buf = sizeof (buf);
1161 memset (buf, *fill_literal, n_per_buf);
1166 n_per_buf = sizeof(buf)/fill_size;
1167 for (i = n_per_buf, bufp = buf; i; i--, bufp += fill_size)
1168 memcpy(bufp, fill_literal, fill_size);
1170 for (; count > 0; count -= n_per_buf)
1172 n_per_buf = n_per_buf > count ? count : n_per_buf;
1173 x = bfd_set_section_contents (stdoutput, sec,
1174 buf, (file_ptr) offset,
1175 (bfd_size_type) n_per_buf * fill_size);
1177 as_fatal (_("Cannot write to output file."));
1178 offset += n_per_buf * fill_size;
1186 #if defined(BFD_ASSEMBLER) || (!defined (BFD) && !defined(OBJ_AOUT))
1188 merge_data_into_text ()
1190 #if defined(BFD_ASSEMBLER) || defined(MANY_SEGMENTS)
1191 seg_info (text_section)->frchainP->frch_last->fr_next =
1192 seg_info (data_section)->frchainP->frch_root;
1193 seg_info (text_section)->frchainP->frch_last =
1194 seg_info (data_section)->frchainP->frch_last;
1195 seg_info (data_section)->frchainP = 0;
1199 text_last_frag->fr_next = data_frag_root;
1200 text_last_frag = data_last_frag;
1201 data_last_frag = NULL;
1202 data_frag_root = NULL;
1205 for (tmp = text_fix_root; tmp->fx_next; tmp = tmp->fx_next);;
1206 tmp->fx_next = data_fix_root;
1207 text_fix_tail = data_fix_tail;
1210 text_fix_root = data_fix_root;
1211 data_fix_root = NULL;
1214 #endif /* BFD_ASSEMBLER || (! BFD && ! OBJ_AOUT) */
1216 #if !defined (BFD_ASSEMBLER) && !defined (BFD)
1218 relax_and_size_all_segments ()
1222 relax_segment (text_frag_root, SEG_TEXT);
1223 relax_segment (data_frag_root, SEG_DATA);
1224 relax_segment (bss_frag_root, SEG_BSS);
1226 * Now the addresses of frags are correct within the segment.
1229 know (text_last_frag->fr_type == rs_fill && text_last_frag->fr_offset == 0);
1230 H_SET_TEXT_SIZE (&headers, text_last_frag->fr_address);
1231 text_last_frag->fr_address = H_GET_TEXT_SIZE (&headers);
1234 * Join the 2 segments into 1 huge segment.
1235 * To do this, re-compute every rn_address in the SEG_DATA frags.
1236 * Then join the data frags after the text frags.
1238 * Determine a_data [length of data segment].
1242 register relax_addressT slide;
1244 know ((text_last_frag->fr_type == rs_fill) && (text_last_frag->fr_offset == 0));
1246 H_SET_DATA_SIZE (&headers, data_last_frag->fr_address);
1247 data_last_frag->fr_address = H_GET_DATA_SIZE (&headers);
1248 slide = H_GET_TEXT_SIZE (&headers); /* & in file of the data segment. */
1250 #define RoundUp(N,S) (((N)+(S)-1)&-(S))
1251 /* For b.out: If the data section has a strict alignment
1252 requirement, its load address in the .o file will be
1253 rounded up from the size of the text section. These
1254 two values are *not* the same! Similarly for the bss
1256 slide = RoundUp (slide, 1 << section_alignment[SEG_DATA]);
1259 for (fragP = data_frag_root; fragP; fragP = fragP->fr_next)
1261 fragP->fr_address += slide;
1262 } /* for each data frag */
1264 know (text_last_frag != 0);
1265 text_last_frag->fr_next = data_frag_root;
1269 H_SET_DATA_SIZE (&headers, 0);
1273 /* See above comments on b.out data section address. */
1276 if (data_last_frag == 0)
1277 bss_vma = H_GET_TEXT_SIZE (&headers);
1279 bss_vma = data_last_frag->fr_address;
1280 bss_vma = RoundUp (bss_vma, 1 << section_alignment[SEG_BSS]);
1281 bss_address_frag.fr_address = bss_vma;
1283 #else /* ! OBJ_BOUT */
1284 bss_address_frag.fr_address = (H_GET_TEXT_SIZE (&headers) +
1285 H_GET_DATA_SIZE (&headers));
1287 #endif /* ! OBJ_BOUT */
1289 /* Slide all the frags */
1292 relax_addressT slide = bss_address_frag.fr_address;
1294 for (fragP = bss_frag_root; fragP; fragP = fragP->fr_next)
1296 fragP->fr_address += slide;
1297 } /* for each bss frag */
1301 H_SET_BSS_SIZE (&headers,
1302 bss_last_frag->fr_address - bss_frag_root->fr_address);
1304 H_SET_BSS_SIZE (&headers, 0);
1306 #endif /* ! BFD_ASSEMBLER && ! BFD */
1308 #if defined (BFD_ASSEMBLER) || !defined (BFD)
1310 #ifdef BFD_ASSEMBLER
1318 extern PTR bfd_alloc PARAMS ((bfd *, size_t));
1320 /* Count symbols. We can't rely on a count made by the loop in
1321 write_object_file, because *_frob_file may add a new symbol or
1324 for (symp = symbol_rootP; symp; symp = symbol_next (symp))
1331 asympp = (asymbol **) bfd_alloc (stdoutput,
1332 nsyms * sizeof (asymbol *));
1333 symp = symbol_rootP;
1334 for (i = 0; i < nsyms; i++, symp = symbol_next (symp))
1336 asympp[i] = symbol_get_bfdsym (symp);
1337 symbol_mark_written (symp);
1342 result = bfd_set_symtab (stdoutput, asympp, nsyms);
1343 assert (result == true);
1344 symbol_table_frozen = 1;
1348 /* Finish the subsegments. After every sub-segment, we fake an
1349 ".align ...". This conforms to BSD4.2 brane-damage. We then fake
1350 ".fill 0" because that is the kind of frag that requires least
1351 thought. ".align" frags like to have a following frag since that
1352 makes calculating their intended length trivial. */
1354 #ifndef SUB_SEGMENT_ALIGN
1355 #ifdef BFD_ASSEMBLER
1356 #define SUB_SEGMENT_ALIGN(SEG) (0)
1358 #define SUB_SEGMENT_ALIGN(SEG) (2)
1365 struct frchain *frchainP;
1367 for (frchainP = frchain_root; frchainP; frchainP = frchainP->frch_next)
1369 subseg_set (frchainP->frch_seg, frchainP->frch_subseg);
1371 /* This now gets called even if we had errors. In that case,
1372 any alignment is meaningless, and, moreover, will look weird
1373 if we are generating a listing. */
1374 frag_align (had_errors () ? 0 : SUB_SEGMENT_ALIGN (now_seg),
1375 subseg_text_p (now_seg) ? NOP_OPCODE : 0,
1378 /* frag_align will have left a new frag.
1379 Use this last frag for an empty ".fill".
1381 For this segment ...
1382 Create a last frag. Do not leave a "being filled in frag". */
1384 frag_wane (frag_now);
1385 frag_now->fr_fix = 0;
1386 know (frag_now->fr_next == NULL);
1390 /* Write the object file. */
1393 write_object_file ()
1395 #if ! defined (BFD_ASSEMBLER) || ! defined (WORKING_DOT_WORD)
1396 fragS *fragP; /* Track along all frags. */
1399 /* Do we really want to write it? */
1401 int n_warns, n_errs;
1402 n_warns = had_warnings ();
1403 n_errs = had_errors ();
1404 /* The -Z flag indicates that an object file should be generated,
1405 regardless of warnings and errors. */
1406 if (flag_always_generate_output)
1408 if (n_warns || n_errs)
1409 as_warn (_("%d error%s, %d warning%s, generating bad object file.\n"),
1410 n_errs, n_errs == 1 ? "" : "s",
1411 n_warns, n_warns == 1 ? "" : "s");
1416 as_fatal (_("%d error%s, %d warning%s, no object file generated.\n"),
1417 n_errs, n_errs == 1 ? "" : "s",
1418 n_warns, n_warns == 1 ? "" : "s");
1423 /* Under VMS we try to be compatible with VAX-11 "C". Thus, we call
1424 a routine to check for the definition of the procedure "_main",
1425 and if so -- fix it up so that it can be program entry point. */
1426 vms_check_for_main ();
1427 #endif /* OBJ_VMS */
1429 /* From now on, we don't care about sub-segments. Build one frag chain
1430 for each segment. Linked thru fr_next. */
1432 #ifdef BFD_ASSEMBLER
1433 /* Remove the sections created by gas for its own purposes. */
1435 asection **seclist, *sec;
1438 seclist = &stdoutput->sections;
1439 while (seclist && *seclist)
1442 while (sec == reg_section || sec == expr_section)
1446 stdoutput->section_count--;
1451 seclist = &(*seclist)->next;
1454 bfd_map_over_sections (stdoutput, renumber_sections, &i);
1457 bfd_map_over_sections (stdoutput, chain_frchains_together, (char *) 0);
1459 remove_subsegs (frchain_root, SEG_TEXT, &text_frag_root, &text_last_frag);
1460 remove_subsegs (data0_frchainP, SEG_DATA, &data_frag_root, &data_last_frag);
1461 remove_subsegs (bss0_frchainP, SEG_BSS, &bss_frag_root, &bss_last_frag);
1464 /* We have two segments. If user gave -R flag, then we must put the
1465 data frags into the text segment. Do this before relaxing so
1466 we know to take advantage of -R and make shorter addresses. */
1467 #if !defined (OBJ_AOUT) || defined (BFD_ASSEMBLER)
1468 if (flag_readonly_data_in_text)
1470 merge_data_into_text ();
1474 #ifdef BFD_ASSEMBLER
1475 bfd_map_over_sections (stdoutput, relax_and_size_seg, (char *) 0);
1477 relax_and_size_all_segments ();
1478 #endif /* BFD_ASSEMBLER */
1480 #ifndef BFD_ASSEMBLER
1483 * Crawl the symbol chain.
1485 * For each symbol whose value depends on a frag, take the address of
1486 * that frag and subsume it into the value of the symbol.
1487 * After this, there is just one way to lookup a symbol value.
1488 * Values are left in their final state for object file emission.
1489 * We adjust the values of 'L' local symbols, even if we do
1490 * not intend to emit them to the object file, because their values
1491 * are needed for fix-ups.
1493 * Unless we saw a -L flag, remove all symbols that begin with 'L'
1494 * from the symbol chain. (They are still pointed to by the fixes.)
1496 * Count the remaining symbols.
1497 * Assign a symbol number to each symbol.
1498 * Count the number of string-table chars we will emit.
1499 * Put this info into the headers as appropriate.
1502 know (zero_address_frag.fr_address == 0);
1503 string_byte_count = sizeof (string_byte_count);
1505 obj_crawl_symbol_chain (&headers);
1507 if (string_byte_count == sizeof (string_byte_count))
1508 string_byte_count = 0;
1510 H_SET_STRING_SIZE (&headers, string_byte_count);
1513 * Addresses of frags now reflect addresses we use in the object file.
1514 * Symbol values are correct.
1515 * Scan the frags, converting any ".org"s and ".align"s to ".fill"s.
1516 * Also converting any machine-dependent frags using md_convert_frag();
1518 subseg_change (SEG_TEXT, 0);
1520 for (fragP = text_frag_root; fragP; fragP = fragP->fr_next)
1522 /* At this point we have linked all the frags into a single
1523 chain. However, cvt_frag_to_fill may call md_convert_frag
1524 which may call fix_new. We need to ensure that fix_new adds
1525 the fixup to the right section. */
1526 if (fragP == data_frag_root)
1527 subseg_change (SEG_DATA, 0);
1529 cvt_frag_to_fill (&headers, SEG_TEXT, fragP);
1531 /* Some assert macros don't work with # directives mixed in. */
1533 if (!(fragP->fr_next == NULL
1535 || fragP->fr_next == data_frag_root
1537 || ((fragP->fr_next->fr_address - fragP->fr_address)
1538 == (fragP->fr_fix + fragP->fr_offset * fragP->fr_var))))
1542 #endif /* ! BFD_ASSEMBLER */
1544 #ifndef WORKING_DOT_WORD
1546 struct broken_word *lie;
1547 struct broken_word **prevP;
1549 prevP = &broken_words;
1550 for (lie = broken_words; lie; lie = lie->next_broken_word)
1555 subseg_change (lie->seg, lie->subseg);
1556 exp.X_op = O_subtract;
1557 exp.X_add_symbol = lie->add;
1558 exp.X_op_symbol = lie->sub;
1559 exp.X_add_number = lie->addnum;
1560 #ifdef BFD_ASSEMBLER
1561 #ifdef TC_CONS_FIX_NEW
1562 TC_CONS_FIX_NEW (lie->frag,
1563 lie->word_goes_here - lie->frag->fr_literal,
1566 fix_new_exp (lie->frag,
1567 lie->word_goes_here - lie->frag->fr_literal,
1568 2, &exp, 0, BFD_RELOC_16);
1571 #if defined(TC_SPARC) || defined(TC_A29K) || defined(NEED_FX_R_TYPE)
1572 fix_new_exp (lie->frag,
1573 lie->word_goes_here - lie->frag->fr_literal,
1574 2, &exp, 0, NO_RELOC);
1577 fix_new_ns32k_exp (lie->frag,
1578 lie->word_goes_here - lie->frag->fr_literal,
1579 2, &exp, 0, 0, 2, 0, 0);
1581 fix_new_exp (lie->frag,
1582 lie->word_goes_here - lie->frag->fr_literal,
1584 #endif /* TC_NS32K */
1585 #endif /* TC_SPARC|TC_A29K|NEED_FX_R_TYPE */
1586 #endif /* BFD_ASSEMBLER */
1587 *prevP = lie->next_broken_word;
1590 prevP = &(lie->next_broken_word);
1592 for (lie = broken_words; lie;)
1594 struct broken_word *untruth;
1596 addressT table_addr;
1597 addressT from_addr, to_addr;
1600 subseg_change (lie->seg, lie->subseg);
1601 fragP = lie->dispfrag;
1603 /* Find out how many broken_words go here. */
1605 for (untruth = lie; untruth && untruth->dispfrag == fragP; untruth = untruth->next_broken_word)
1606 if (untruth->added == 1)
1609 table_ptr = lie->dispfrag->fr_opcode;
1610 table_addr = lie->dispfrag->fr_address + (table_ptr - lie->dispfrag->fr_literal);
1611 /* Create the jump around the long jumps. This is a short
1612 jump from table_ptr+0 to table_ptr+n*long_jump_size. */
1613 from_addr = table_addr;
1614 to_addr = table_addr + md_short_jump_size + n * md_long_jump_size;
1615 md_create_short_jump (table_ptr, from_addr, to_addr, lie->dispfrag, lie->add);
1616 table_ptr += md_short_jump_size;
1617 table_addr += md_short_jump_size;
1619 for (m = 0; lie && lie->dispfrag == fragP; m++, lie = lie->next_broken_word)
1621 if (lie->added == 2)
1623 /* Patch the jump table */
1624 /* This is the offset from ??? to table_ptr+0 */
1625 to_addr = table_addr - S_GET_VALUE (lie->sub);
1626 #ifdef BFD_ASSEMBLER
1627 to_addr -= symbol_get_frag (lie->sub)->fr_address;
1629 md_number_to_chars (lie->word_goes_here, to_addr, 2);
1630 for (untruth = lie->next_broken_word; untruth && untruth->dispfrag == fragP; untruth = untruth->next_broken_word)
1632 if (untruth->use_jump == lie)
1633 md_number_to_chars (untruth->word_goes_here, to_addr, 2);
1636 /* Install the long jump */
1637 /* this is a long jump from table_ptr+0 to the final target */
1638 from_addr = table_addr;
1639 to_addr = S_GET_VALUE (lie->add) + lie->addnum;
1640 #ifdef BFD_ASSEMBLER
1641 to_addr += symbol_get_frag (lie->add)->fr_address;
1643 md_create_long_jump (table_ptr, from_addr, to_addr, lie->dispfrag, lie->add);
1644 table_ptr += md_long_jump_size;
1645 table_addr += md_long_jump_size;
1649 #endif /* not WORKING_DOT_WORD */
1651 #ifndef BFD_ASSEMBLER
1654 char *the_object_file;
1655 long object_file_size;
1657 * Scan every FixS performing fixups. We had to wait until now to do
1658 * this because md_convert_frag() may have made some fixSs.
1662 subseg_change (SEG_TEXT, 0);
1663 trsize = md_reloc_size * fixup_segment (text_fix_root, SEG_TEXT);
1664 subseg_change (SEG_DATA, 0);
1665 drsize = md_reloc_size * fixup_segment (data_fix_root, SEG_DATA);
1666 H_SET_RELOCATION_SIZE (&headers, trsize, drsize);
1668 /* FIXME move this stuff into the pre-write-hook */
1669 H_SET_MAGIC_NUMBER (&headers, magic_number_for_object_file);
1670 H_SET_ENTRY_POINT (&headers, 0);
1672 obj_pre_write_hook (&headers); /* extra coff stuff */
1674 object_file_size = H_GET_FILE_SIZE (&headers);
1675 next_object_file_charP = the_object_file = xmalloc (object_file_size);
1677 output_file_create (out_file_name);
1679 obj_header_append (&next_object_file_charP, &headers);
1681 know ((next_object_file_charP - the_object_file) == H_GET_HEADER_SIZE (&headers));
1686 for (fragP = text_frag_root; fragP; fragP = fragP->fr_next)
1688 register long count;
1689 register char *fill_literal;
1690 register long fill_size;
1693 know (fragP->fr_type == rs_fill);
1694 append (&next_object_file_charP, fragP->fr_literal, (unsigned long) fragP->fr_fix);
1695 fill_literal = fragP->fr_literal + fragP->fr_fix;
1696 fill_size = fragP->fr_var;
1697 know (fragP->fr_offset >= 0);
1699 for (count = fragP->fr_offset; count; count--)
1701 append (&next_object_file_charP, fill_literal, (unsigned long) fill_size);
1704 } /* for each code frag. */
1706 know ((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE (&headers) + H_GET_TEXT_SIZE (&headers) + H_GET_DATA_SIZE (&headers)));
1711 obj_emit_relocations (&next_object_file_charP, text_fix_root, (relax_addressT) 0);
1712 know ((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE (&headers) + H_GET_TEXT_SIZE (&headers) + H_GET_DATA_SIZE (&headers) + H_GET_TEXT_RELOCATION_SIZE (&headers)));
1714 /* Make addresses in data relocation directives relative to beginning of
1715 * first data fragment, not end of last text fragment: alignment of the
1716 * start of the data segment may place a gap between the segments.
1718 obj_emit_relocations (&next_object_file_charP, data_fix_root, data0_frchainP->frch_root->fr_address);
1720 obj_emit_relocations (&next_object_file_charP, data_fix_root, text_last_frag->fr_address);
1721 #endif /* TC_I960 */
1723 know ((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE (&headers) + H_GET_TEXT_SIZE (&headers) + H_GET_DATA_SIZE (&headers) + H_GET_TEXT_RELOCATION_SIZE (&headers) + H_GET_DATA_RELOCATION_SIZE (&headers)));
1726 * Emit line number entries.
1728 OBJ_EMIT_LINENO (&next_object_file_charP, lineno_rootP, the_object_file);
1729 know ((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE (&headers) + H_GET_TEXT_SIZE (&headers) + H_GET_DATA_SIZE (&headers) + H_GET_TEXT_RELOCATION_SIZE (&headers) + H_GET_DATA_RELOCATION_SIZE (&headers) + H_GET_LINENO_SIZE (&headers)));
1734 obj_emit_symbols (&next_object_file_charP, symbol_rootP);
1735 know ((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE (&headers) + H_GET_TEXT_SIZE (&headers) + H_GET_DATA_SIZE (&headers) + H_GET_TEXT_RELOCATION_SIZE (&headers) + H_GET_DATA_RELOCATION_SIZE (&headers) + H_GET_LINENO_SIZE (&headers) + H_GET_SYMBOL_TABLE_SIZE (&headers)));
1741 if (string_byte_count > 0)
1743 obj_emit_strings (&next_object_file_charP);
1744 } /* only if we have a string table */
1747 bfd_seek (stdoutput, 0, 0);
1748 bfd_write (the_object_file, 1, object_file_size, stdoutput);
1751 /* Write the data to the file */
1752 output_file_append (the_object_file, object_file_size, out_file_name);
1753 free (the_object_file);
1755 } /* non vms output */
1758 * Now do the VMS-dependent part of writing the object file
1760 vms_write_object_file (H_GET_TEXT_SIZE (&headers),
1761 H_GET_DATA_SIZE (&headers),
1762 H_GET_BSS_SIZE (&headers),
1763 text_frag_root, data_frag_root);
1764 #endif /* OBJ_VMS */
1765 #else /* BFD_ASSEMBLER */
1767 /* Resolve symbol values. This needs to be done before processing
1773 for (symp = symbol_rootP; symp; symp = symbol_next (symp))
1774 resolve_symbol_value (symp, 1);
1776 resolve_local_symbol_values ();
1780 #ifdef tc_frob_file_before_adjust
1781 tc_frob_file_before_adjust ();
1783 #ifdef obj_frob_file_before_adjust
1784 obj_frob_file_before_adjust ();
1787 bfd_map_over_sections (stdoutput, adjust_reloc_syms, (char *)0);
1789 /* Set up symbol table, and write it out. */
1794 for (symp = symbol_rootP; symp; symp = symbol_next (symp))
1799 if (symbol_mri_common_p (symp))
1801 if (S_IS_EXTERNAL (symp))
1802 as_bad (_("%s: global symbols not supported in common sections"),
1804 symbol_remove (symp, &symbol_rootP, &symbol_lastP);
1808 name = S_GET_NAME (symp);
1811 const char *name2 = decode_local_label_name ((char *)S_GET_NAME (symp));
1812 /* They only differ if `name' is a fb or dollar local
1814 if (name2 != name && ! S_IS_DEFINED (symp))
1815 as_bad (_("local label %s is not defined"), name2);
1818 /* Do it again, because adjust_reloc_syms might introduce
1819 more symbols. They'll probably only be section symbols,
1820 but they'll still need to have the values computed. */
1821 resolve_symbol_value (symp, 1);
1823 /* Skip symbols which were equated to undefined or common
1825 if (symbol_equated_p (symp)
1826 && (! S_IS_DEFINED (symp) || S_IS_COMMON (symp)))
1828 symbol_remove (symp, &symbol_rootP, &symbol_lastP);
1832 /* So far, common symbols have been treated like undefined symbols.
1833 Put them in the common section now. */
1834 if (S_IS_DEFINED (symp) == 0
1835 && S_GET_VALUE (symp) != 0)
1836 S_SET_SEGMENT (symp, bfd_com_section_ptr);
1838 printf ("symbol `%s'\n\t@%x: value=%d flags=%x seg=%s\n",
1839 S_GET_NAME (symp), symp,
1841 symbol_get_bfdsym (symp)->flags,
1842 segment_name (S_GET_SEGMENT (symp)));
1845 #ifdef obj_frob_symbol
1846 obj_frob_symbol (symp, punt);
1848 #ifdef tc_frob_symbol
1849 if (! punt || symbol_used_in_reloc_p (symp))
1850 tc_frob_symbol (symp, punt);
1853 /* If we don't want to keep this symbol, splice it out of
1854 the chain now. If EMIT_SECTION_SYMBOLS is 0, we never
1855 want section symbols. Otherwise, we skip local symbols
1856 and symbols that the frob_symbol macros told us to punt,
1857 but we keep such symbols if they are used in relocs. */
1858 if ((! EMIT_SECTION_SYMBOLS
1859 && symbol_section_p (symp))
1860 /* Note that S_IS_EXTERN and S_IS_LOCAL are not always
1861 opposites. Sometimes the former checks flags and the
1862 latter examines the name... */
1863 || (!S_IS_EXTERN (symp)
1864 && (S_IS_LOCAL (symp) || punt)
1865 && ! symbol_used_in_reloc_p (symp)))
1867 symbol_remove (symp, &symbol_rootP, &symbol_lastP);
1868 /* After symbol_remove, symbol_next(symp) still returns
1869 the one that came after it in the chain. So we don't
1870 need to do any extra cleanup work here. */
1875 /* Make sure we really got a value for the symbol. */
1876 if (! symbol_resolved_p (symp))
1878 as_bad (_("can't resolve value for symbol \"%s\""),
1880 symbol_mark_resolved (symp);
1883 /* Set the value into the BFD symbol. Up til now the value
1884 has only been kept in the gas symbolS struct. */
1885 symbol_get_bfdsym (symp)->value = S_GET_VALUE (symp);
1891 /* Now do any format-specific adjustments to the symbol table, such
1892 as adding file symbols. */
1893 #ifdef tc_adjust_symtab
1894 tc_adjust_symtab ();
1896 #ifdef obj_adjust_symtab
1897 obj_adjust_symtab ();
1900 /* Now that all the sizes are known, and contents correct, we can
1901 start writing to the file. */
1904 /* If *_frob_file changes the symbol value at this point, it is
1905 responsible for moving the changed value into symp->bsym->value
1906 as well. Hopefully all symbol value changing can be done in
1911 #ifdef obj_frob_file
1915 bfd_map_over_sections (stdoutput, write_relocs, (char *) 0);
1917 #ifdef tc_frob_file_after_relocs
1918 tc_frob_file_after_relocs ();
1920 #ifdef obj_frob_file_after_relocs
1921 obj_frob_file_after_relocs ();
1924 bfd_map_over_sections (stdoutput, write_contents, (char *) 0);
1925 #endif /* BFD_ASSEMBLER */
1932 * Now we have a segment, not a crowd of sub-segments, we can make fr_address
1937 * After this, all frags in this segment have addresses that are correct
1938 * within the segment. Since segments live in different file addresses,
1939 * these frag addresses may not be the same as final object-file addresses.
1942 #ifdef TC_GENERIC_RELAX_TABLE
1944 static int is_dnrange PARAMS ((fragS *, fragS *));
1946 /* Subroutines of relax_segment. */
1952 for (; f1; f1 = f1->fr_next)
1953 if (f1->fr_next == f2)
1958 /* Relax a fragment by scanning TC_GENERIC_RELAX_TABLE. */
1961 relax_frag (fragP, stretch)
1965 const relax_typeS *this_type;
1966 const relax_typeS *start_type;
1967 relax_substateT next_state;
1968 relax_substateT this_state;
1969 long aim, target, growth;
1970 symbolS *symbolP = fragP->fr_symbol;
1971 long offset = fragP->fr_offset;
1972 /* Recompute was_address by undoing "+= stretch" done by relax_segment. */
1973 unsigned long was_address = fragP->fr_address - stretch;
1974 unsigned long address = fragP->fr_address;
1975 const relax_typeS *table = TC_GENERIC_RELAX_TABLE;
1977 this_state = fragP->fr_subtype;
1978 start_type = this_type = table + this_state;
1983 #ifndef DIFF_EXPR_OK
1984 #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER)
1985 know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE)
1986 || (S_GET_SEGMENT (symbolP) == SEG_DATA)
1987 || (S_GET_SEGMENT (symbolP) == SEG_BSS)
1988 || (S_GET_SEGMENT (symbolP) == SEG_TEXT));
1990 know (symbolP->sy_frag);
1992 know (!(S_GET_SEGMENT (symbolP) == absolute_section)
1993 || symbolP->sy_frag == &zero_address_frag);
1994 target += S_GET_VALUE (symbolP) + symbol_get_frag (symbolP)->fr_address;
1996 /* If frag has yet to be reached on this pass,
1997 assume it will move by STRETCH just as we did.
1998 If this is not so, it will be because some frag
1999 between grows, and that will force another pass.
2001 Beware zero-length frags.
2003 There should be a faster way to do this. */
2005 if (symbol_get_frag (symbolP)->fr_address >= was_address
2006 && is_dnrange (fragP, symbol_get_frag (symbolP)))
2012 aim = target - address - fragP->fr_fix;
2013 #ifdef TC_PCREL_ADJUST
2014 /* Currently only the ns32k family needs this */
2015 aim += TC_PCREL_ADJUST(fragP);
2017 /* This machine doesn't want to use pcrel_adjust.
2018 In that case, pcrel_adjust should be zero. */
2019 /* assert (fragP->fr_targ.ns32k.pcrel_adjust == 0);*/
2021 #ifdef md_prepare_relax_scan /* formerly called M68K_AIM_KLUDGE */
2022 md_prepare_relax_scan (fragP, address, aim, this_state, this_type);
2027 /* Look backwards. */
2028 for (next_state = this_type->rlx_more; next_state;)
2029 if (aim >= this_type->rlx_backward)
2033 /* Grow to next state. */
2034 this_state = next_state;
2035 this_type = table + this_state;
2036 next_state = this_type->rlx_more;
2041 /* Look forwards. */
2042 for (next_state = this_type->rlx_more; next_state;)
2043 if (aim <= this_type->rlx_forward)
2047 /* Grow to next state. */
2048 this_state = next_state;
2049 this_type = table + this_state;
2050 next_state = this_type->rlx_more;
2054 growth = this_type->rlx_length - start_type->rlx_length;
2056 fragP->fr_subtype = this_state;
2060 #endif /* defined (TC_GENERIC_RELAX_TABLE) */
2062 /* Relax_align. Advance location counter to next address that has 'alignment'
2063 lowest order bits all 0s, return size of adjustment made. */
2064 static relax_addressT
2065 relax_align (address, alignment)
2066 register relax_addressT address; /* Address now. */
2067 register int alignment; /* Alignment (binary). */
2069 relax_addressT mask;
2070 relax_addressT new_address;
2072 mask = ~((~0) << alignment);
2073 new_address = (address + mask) & (~mask);
2074 #ifdef LINKER_RELAXING_SHRINKS_ONLY
2076 /* We must provide lots of padding, so the linker can discard it
2077 when needed. The linker will not add extra space, ever. */
2078 new_address += (1 << alignment);
2080 return (new_address - address);
2084 relax_segment (segment_frag_root, segment)
2085 struct frag *segment_frag_root;
2088 register struct frag *fragP;
2089 register relax_addressT address;
2090 #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER)
2091 know (segment == SEG_DATA || segment == SEG_TEXT || segment == SEG_BSS);
2093 /* In case md_estimate_size_before_relax() wants to make fixSs. */
2094 subseg_change (segment, 0);
2096 /* For each frag in segment: count and store (a 1st guess of)
2099 for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next)
2101 fragP->fr_address = address;
2102 address += fragP->fr_fix;
2104 switch (fragP->fr_type)
2107 address += fragP->fr_offset * fragP->fr_var;
2113 addressT offset = relax_align (address, (int) fragP->fr_offset);
2115 if (fragP->fr_subtype != 0 && offset > fragP->fr_subtype)
2118 if (offset % fragP->fr_var != 0)
2120 as_bad (_("alignment padding (%lu bytes) not a multiple of %ld"),
2121 (unsigned long) offset, (long) fragP->fr_var);
2122 offset -= (offset % fragP->fr_var);
2131 /* Assume .org is nugatory. It will grow with 1st relax. */
2134 case rs_machine_dependent:
2135 address += md_estimate_size_before_relax (fragP, segment);
2138 #ifndef WORKING_DOT_WORD
2139 /* Broken words don't concern us yet */
2140 case rs_broken_word:
2145 /* Initial guess is always 1; doing otherwise can result in
2146 stable solutions that are larger than the minimum. */
2147 address += fragP->fr_offset = 1;
2151 address += eh_frame_estimate_size_before_relax (fragP);
2155 BAD_CASE (fragP->fr_type);
2157 } /* switch(fr_type) */
2158 } /* for each frag in the segment */
2162 long stretch; /* May be any size, 0 or negative. */
2163 /* Cumulative number of addresses we have */
2164 /* relaxed this pass. */
2165 /* We may have relaxed more than one address. */
2166 long stretched; /* Have we stretched on this pass? */
2167 /* This is 'cuz stretch may be zero, when, in fact some piece of code
2168 grew, and another shrank. If a branch instruction doesn't fit anymore,
2169 we could be scrod. */
2173 stretch = stretched = 0;
2174 for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next)
2177 addressT was_address;
2181 was_address = fragP->fr_address;
2182 address = fragP->fr_address += stretch;
2183 symbolP = fragP->fr_symbol;
2184 offset = fragP->fr_offset;
2186 switch (fragP->fr_type)
2188 case rs_fill: /* .fill never relaxes. */
2192 #ifndef WORKING_DOT_WORD
2193 /* JF: This is RMS's idea. I do *NOT* want to be blamed
2194 for it I do not want to write it. I do not want to have
2195 anything to do with it. This is not the proper way to
2196 implement this misfeature. */
2197 case rs_broken_word:
2199 struct broken_word *lie;
2200 struct broken_word *untruth;
2202 /* Yes this is ugly (storing the broken_word pointer
2203 in the symbol slot). Still, this whole chunk of
2204 code is ugly, and I don't feel like doing anything
2205 about it. Think of it as stubbornness in action. */
2207 for (lie = (struct broken_word *) (fragP->fr_symbol);
2208 lie && lie->dispfrag == fragP;
2209 lie = lie->next_broken_word)
2215 offset = (symbol_get_frag (lie->add)->fr_address
2216 + S_GET_VALUE (lie->add)
2218 - (symbol_get_frag (lie->sub)->fr_address
2219 + S_GET_VALUE (lie->sub)));
2220 if (offset <= -32768 || offset >= 32767)
2222 if (flag_warn_displacement)
2225 sprint_value (buf, (addressT) lie->addnum);
2226 as_warn (_(".word %s-%s+%s didn't fit"),
2227 S_GET_NAME (lie->add),
2228 S_GET_NAME (lie->sub),
2232 if (fragP->fr_subtype == 0)
2234 fragP->fr_subtype++;
2235 growth += md_short_jump_size;
2237 for (untruth = lie->next_broken_word;
2238 untruth && untruth->dispfrag == lie->dispfrag;
2239 untruth = untruth->next_broken_word)
2240 if ((symbol_get_frag (untruth->add)
2241 == symbol_get_frag (lie->add))
2242 && (S_GET_VALUE (untruth->add)
2243 == S_GET_VALUE (lie->add)))
2246 untruth->use_jump = lie;
2248 growth += md_long_jump_size;
2253 } /* case rs_broken_word */
2258 addressT oldoff, newoff;
2260 oldoff = relax_align (was_address + fragP->fr_fix,
2262 newoff = relax_align (address + fragP->fr_fix,
2265 if (fragP->fr_subtype != 0)
2267 if (oldoff > fragP->fr_subtype)
2269 if (newoff > fragP->fr_subtype)
2273 growth = newoff - oldoff;
2279 long target = offset;
2284 #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER)
2285 know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE)
2286 || (S_GET_SEGMENT (symbolP) == SEG_DATA)
2287 || (S_GET_SEGMENT (symbolP) == SEG_TEXT)
2288 || S_GET_SEGMENT (symbolP) == SEG_BSS);
2289 know (symbolP->sy_frag);
2290 know (!(S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE)
2291 || (symbolP->sy_frag == &zero_address_frag));
2293 target += (S_GET_VALUE (symbolP)
2294 + symbol_get_frag (symbolP)->fr_address);
2295 } /* if we have a symbol */
2297 know (fragP->fr_next);
2298 after = fragP->fr_next->fr_address;
2299 growth = target - after;
2302 /* Growth may be negative, but variable part of frag
2303 cannot have fewer than 0 chars. That is, we can't
2305 as_bad (_("attempt to .org backwards ignored"));
2309 growth -= stretch; /* This is an absolute growth factor */
2316 growth = S_GET_VALUE (symbolP);
2317 if (symbol_get_frag (symbolP) != &zero_address_frag
2318 || S_IS_COMMON (symbolP)
2319 || ! S_IS_DEFINED (symbolP))
2320 as_bad_where (fragP->fr_file, fragP->fr_line,
2321 _(".space specifies non-absolute value"));
2322 fragP->fr_symbol = 0;
2325 as_warn (_(".space or .fill with negative value, ignored"));
2333 case rs_machine_dependent:
2334 #ifdef md_relax_frag
2335 growth = md_relax_frag (fragP, stretch);
2337 #ifdef TC_GENERIC_RELAX_TABLE
2338 /* The default way to relax a frag is to look through
2339 TC_GENERIC_RELAX_TABLE. */
2340 growth = relax_frag (fragP, stretch);
2341 #endif /* TC_GENERIC_RELAX_TABLE */
2350 value = resolve_symbol_value (fragP->fr_symbol, 0);
2351 size = sizeof_leb128 (value, fragP->fr_subtype);
2352 growth = size - fragP->fr_offset;
2353 fragP->fr_offset = size;
2358 growth = eh_frame_relax_frag (fragP);
2362 BAD_CASE (fragP->fr_type);
2370 } /* For each frag in the segment. */
2372 while (stretched); /* Until nothing further to relax. */
2376 * We now have valid fr_address'es for each frag.
2380 * All fr_address's are correct, relative to their own segment.
2381 * We have made all the fixS we will ever make.
2383 } /* relax_segment() */
2385 #if defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS))
2387 #ifndef TC_RELOC_RTSYM_LOC_FIXUP
2388 #define TC_RELOC_RTSYM_LOC_FIXUP(X) (1)
2393 Go through all the fixS's in a segment and see which ones can be
2394 handled now. (These consist of fixS where we have since discovered
2395 the value of a symbol, or the address of the frag involved.)
2396 For each one, call md_apply_fix to put the fix into the frag data.
2398 Result is a count of how many relocation structs will be needed to
2399 handle the remaining fixS's that we couldn't completely handle here.
2400 These will be output later by emit_relocations(). */
2403 fixup_segment (fixP, this_segment_type)
2404 register fixS *fixP;
2405 segT this_segment_type; /* N_TYPE bits for segment. */
2407 long seg_reloc_count = 0;
2408 symbolS *add_symbolP;
2409 symbolS *sub_symbolP;
2416 segT add_symbol_segment = absolute_section;
2418 /* If the linker is doing the relaxing, we must not do any fixups.
2420 Well, strictly speaking that's not true -- we could do any that are
2421 PC-relative and don't cross regions that could change size. And for the
2422 i960 (the only machine for which we've got a relaxing linker right now),
2423 we might be able to turn callx/callj into bal anyways in cases where we
2424 know the maximum displacement. */
2427 for (; fixP; fixP = fixP->fx_next)
2429 TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count);
2430 return seg_reloc_count;
2433 for (; fixP; fixP = fixP->fx_next)
2437 fprintf (stderr, "\nprocessing fixup:\n");
2442 fragP = fixP->fx_frag;
2444 where = fixP->fx_where;
2445 place = fragP->fr_literal + where;
2446 size = fixP->fx_size;
2447 add_symbolP = fixP->fx_addsy;
2448 #ifdef TC_VALIDATE_FIX
2449 TC_VALIDATE_FIX (fixP, this_segment_type, skip);
2451 sub_symbolP = fixP->fx_subsy;
2452 add_number = fixP->fx_offset;
2453 pcrel = fixP->fx_pcrel;
2456 if (add_symbolP != NULL
2457 && symbol_mri_common_p (add_symbolP))
2459 know (add_symbolP->sy_value.X_op == O_symbol);
2460 add_number += S_GET_VALUE (add_symbolP);
2461 fixP->fx_offset = add_number;
2462 add_symbolP = fixP->fx_addsy =
2463 symbol_get_value_expression (add_symbolP)->X_add_symbol;
2467 add_symbol_segment = S_GET_SEGMENT (add_symbolP);
2471 resolve_symbol_value (sub_symbolP, 1);
2472 if (add_symbolP == NULL || add_symbol_segment == absolute_section)
2474 if (add_symbolP != NULL)
2476 add_number += S_GET_VALUE (add_symbolP);
2478 fixP->fx_addsy = NULL;
2481 /* It's just -sym */
2482 if (S_GET_SEGMENT (sub_symbolP) == absolute_section)
2484 add_number -= S_GET_VALUE (sub_symbolP);
2485 fixP->fx_subsy = NULL;
2488 && S_GET_SEGMENT (sub_symbolP) == this_segment_type)
2490 /* Should try converting to a constant. */
2495 as_bad_where (fixP->fx_file, fixP->fx_line,
2496 _("Negative of non-absolute symbol %s"),
2497 S_GET_NAME (sub_symbolP));
2499 else if (S_GET_SEGMENT (sub_symbolP) == add_symbol_segment
2500 && SEG_NORMAL (add_symbol_segment))
2502 /* Difference of 2 symbols from same segment.
2503 Can't make difference of 2 undefineds: 'value' means
2504 something different for N_UNDF. */
2506 /* Makes no sense to use the difference of 2 arbitrary symbols
2507 as the target of a call instruction. */
2509 as_bad_where (fixP->fx_file, fixP->fx_line,
2510 _("callj to difference of 2 symbols"));
2511 #endif /* TC_I960 */
2512 add_number += S_GET_VALUE (add_symbolP) -
2513 S_GET_VALUE (sub_symbolP);
2516 pcrel = 0; /* No further pcrel processing. */
2518 /* Let the target machine make the final determination
2519 as to whether or not a relocation will be needed to
2520 handle this fixup. */
2521 if (!TC_FORCE_RELOCATION_SECTION (fixP, this_segment_type))
2524 fixP->fx_addsy = NULL;
2525 fixP->fx_subsy = NULL;
2530 /* Different segments in subtraction. */
2531 know (!(S_IS_EXTERNAL (sub_symbolP)
2532 && (S_GET_SEGMENT (sub_symbolP) == absolute_section)));
2534 if ((S_GET_SEGMENT (sub_symbolP) == absolute_section))
2535 add_number -= S_GET_VALUE (sub_symbolP);
2538 else if (S_GET_SEGMENT (sub_symbolP) == this_segment_type
2539 #if 0 /* Do this even if it's already described as pc-relative. For example,
2540 on the m68k, an operand of "pc@(foo-.-2)" should address "foo" in a
2541 pc-relative mode. */
2546 /* Make it pc-relative. */
2547 add_number += (MD_PCREL_FROM_SECTION (fixP, this_segment_type)
2548 - S_GET_VALUE (sub_symbolP));
2555 #ifdef UNDEFINED_DIFFERENCE_OK
2556 /* The PA needs this for PIC code generation. We basically
2557 don't want to do anything if we have the difference of two
2558 symbols at this point. */
2561 /* Leave it alone. */
2564 #ifdef BFD_ASSEMBLER
2565 else if (fixP->fx_r_type == BFD_RELOC_GPREL32
2566 || fixP->fx_r_type == BFD_RELOC_GPREL16)
2568 /* Leave it alone. */
2574 sprint_value (buf, fragP->fr_address + where);
2575 as_bad_where (fixP->fx_file, fixP->fx_line,
2576 _("Subtraction of two symbols in different sections \"%s\" {%s section} - \"%s\" {%s section} at file address %s."),
2577 S_GET_NAME (add_symbolP),
2578 segment_name (S_GET_SEGMENT (add_symbolP)),
2579 S_GET_NAME (sub_symbolP),
2580 segment_name (S_GET_SEGMENT (sub_symbolP)),
2588 if (add_symbol_segment == this_segment_type && pcrel && !plt
2589 && TC_RELOC_RTSYM_LOC_FIXUP (fixP))
2592 * This fixup was made when the symbol's segment was
2593 * SEG_UNKNOWN, but it is now in the local segment.
2594 * So we know how to do the address without relocation.
2597 /* reloc_callj() may replace a 'call' with a 'calls' or a
2598 'bal', in which cases it modifies *fixP as appropriate.
2599 In the case of a 'calls', no further work is required,
2600 and *fixP has been set up to make the rest of the code
2603 #endif /* TC_I960 */
2605 add_number += S_GET_VALUE (add_symbolP);
2606 add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment_type);
2607 pcrel = 0; /* Lie. Don't want further pcrel processing. */
2609 /* Let the target machine make the final determination
2610 as to whether or not a relocation will be needed to
2611 handle this fixup. */
2612 if (!TC_FORCE_RELOCATION (fixP))
2615 fixP->fx_addsy = NULL;
2620 if (add_symbol_segment == absolute_section
2624 /* See comment about reloc_callj() above. */
2626 #endif /* TC_I960 */
2627 add_number += S_GET_VALUE (add_symbolP);
2629 /* Let the target machine make the final determination
2630 as to whether or not a relocation will be needed to
2631 handle this fixup. */
2633 if (!TC_FORCE_RELOCATION (fixP))
2635 fixP->fx_addsy = NULL;
2639 else if (add_symbol_segment == undefined_section
2640 #ifdef BFD_ASSEMBLER
2641 || bfd_is_com_section (add_symbol_segment)
2646 if ((int) fixP->fx_bit_fixP == 13)
2648 /* This is a COBR instruction. They have only a
2649 * 13-bit displacement and are only to be used
2650 * for local branches: flag as error, don't generate
2653 as_bad_where (fixP->fx_file, fixP->fx_line,
2654 _("can't use COBR format with external label"));
2655 fixP->fx_addsy = NULL;
2659 #endif /* TC_I960 */
2663 if (S_IS_COMMON (add_symbolP))
2664 add_number += S_GET_VALUE (add_symbolP);
2665 #endif /* TE_I386AIX */
2666 #endif /* OBJ_COFF */
2672 #if !(defined (TC_V850) && defined (OBJ_ELF))
2673 #if !(defined (TC_M68K) && defined (OBJ_ELF))
2674 #if !(defined (TC_ARM) && defined (OBJ_ELF))
2675 #if !(defined (TC_I960) && defined (OBJ_ELF))
2676 #if !defined (TC_I386) || !(defined (OBJ_ELF) || defined (OBJ_COFF)) || defined (TE_PE)
2677 add_number += S_GET_VALUE (add_symbolP);
2689 add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment_type);
2690 if (add_symbolP == 0)
2692 #ifndef BFD_ASSEMBLER
2693 fixP->fx_addsy = &abs_symbol;
2695 fixP->fx_addsy = section_symbol (absolute_section);
2697 symbol_mark_used_in_reloc (fixP->fx_addsy);
2704 #ifdef MD_APPLY_FIX3
2705 md_apply_fix3 (fixP, &add_number, this_segment_type);
2707 #ifdef BFD_ASSEMBLER
2708 md_apply_fix (fixP, &add_number);
2710 md_apply_fix (fixP, add_number);
2714 #ifndef TC_HANDLES_FX_DONE
2715 /* If the tc-* files haven't been converted, assume it's handling
2716 it the old way, where a null fx_addsy means that the fix has
2717 been applied completely, and no further work is needed. */
2718 if (fixP->fx_addsy == 0 && fixP->fx_pcrel == 0)
2723 if (!fixP->fx_bit_fixP && !fixP->fx_no_overflow && size > 0)
2725 if ((size_t) size < sizeof (valueT))
2729 /* set all bits to one */
2732 /* Technically, combining these produces an undefined result
2733 if size is sizeof (valueT), though I think these two
2734 half-way operations should both be defined. And the
2735 compiler should be able to combine them if it's valid on
2736 the host architecture. */
2739 hibit = (valueT) 1 << (size * 8 - 1);
2740 if (((add_number & mask) != 0
2742 && (add_number & hibit) != 0))
2743 && ((add_number & mask) != mask
2744 || (add_number & hibit) == 0))
2746 char buf[50], buf2[50];
2747 sprint_value (buf, fragP->fr_address + where);
2748 if (add_number > 1000)
2749 sprint_value (buf2, add_number);
2751 sprintf (buf2, "%ld", (long) add_number);
2752 as_bad_where (fixP->fx_file, fixP->fx_line,
2753 _("Value of %s too large for field of %d bytes at %s"),
2755 } /* generic error checking */
2757 #ifdef WARN_SIGNED_OVERFLOW_WORD
2758 /* Warn if a .word value is too large when treated as a signed
2759 number. We already know it is not too negative. This is to
2760 catch over-large switches generated by gcc on the 68k. */
2761 if (!flag_signed_overflow_ok
2763 && add_number > 0x7fff)
2764 as_bad_where (fixP->fx_file, fixP->fx_line,
2765 _("Signed .word overflow; switch may be too large; %ld at 0x%lx"),
2767 (unsigned long) (fragP->fr_address + where));
2769 } /* not a bit fix */
2771 #ifdef TC_VALIDATE_FIX
2775 fprintf (stderr, "result:\n");
2778 } /* For each fixS in this segment. */
2780 TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count);
2781 return seg_reloc_count;
2784 #endif /* defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS)) */
2787 number_to_chars_bigendian (buf, val, n)
2792 if ((size_t) n > sizeof (val) || n <= 0)
2796 buf[n] = val & 0xff;
2802 number_to_chars_littleendian (buf, val, n)
2807 if ((size_t) n > sizeof (val) || n <= 0)
2811 *buf++ = val & 0xff;
2817 write_print_statistics (file)
2820 fprintf (file, "fixups: %d\n", n_fixups);
2824 extern int indent_level;
2831 fprintf (stderr, "fix %lx %s:%d", (long) fixp, fixp->fx_file, fixp->fx_line);
2833 fprintf (stderr, " pcrel");
2834 if (fixp->fx_pcrel_adjust)
2835 fprintf (stderr, " pcrel_adjust=%d", fixp->fx_pcrel_adjust);
2836 if (fixp->fx_im_disp)
2839 fprintf (stderr, " im_disp=%d", fixp->fx_im_disp);
2841 fprintf (stderr, " im_disp");
2845 fprintf (stderr, " tcbit");
2847 fprintf (stderr, " done");
2848 fprintf (stderr, "\n size=%d frag=%lx where=%ld offset=%lx addnumber=%lx",
2849 fixp->fx_size, (long) fixp->fx_frag, (long) fixp->fx_where,
2850 (long) fixp->fx_offset, (long) fixp->fx_addnumber);
2851 #ifdef BFD_ASSEMBLER
2852 fprintf (stderr, "\n %s (%d)", bfd_get_reloc_code_name (fixp->fx_r_type),
2855 #ifdef NEED_FX_R_TYPE
2856 fprintf (stderr, " r_type=%d", fixp->fx_r_type);
2861 fprintf (stderr, "\n +<");
2862 print_symbol_value_1 (stderr, fixp->fx_addsy);
2863 fprintf (stderr, ">");
2867 fprintf (stderr, "\n -<");
2868 print_symbol_value_1 (stderr, fixp->fx_subsy);
2869 fprintf (stderr, ">");
2871 fprintf (stderr, "\n");
2872 #ifdef TC_FIX_DATA_PRINT
2873 TC_FIX_DATA_PRINT (stderr, fixp);
2877 /* end of write.c */