1 /* write.c - emit .o file
2 Copyright (C) 1986, 1987, 1990, 1991, 1992, 1993 Free Software Foundation, Inc.
4 This file is part of GAS, the GNU Assembler.
6 GAS is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GAS is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GAS; see the file COPYING. If not, write to
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
20 /* This thing should be set up to do byteordering correctly. But... */
25 #include "output-file.h"
27 /* The NOP_OPCODE is for the alignment fill value. Fill it with a nop
28 instruction so that the disassembler does not choke on it. */
30 #define NOP_OPCODE 0x00
33 #ifndef WORKING_DOT_WORD
34 extern CONST int md_short_jump_size;
35 extern CONST int md_long_jump_size;
41 struct frag *text_frag_root;
42 struct frag *data_frag_root;
43 struct frag *bss_frag_root;
45 struct frag *text_last_frag; /* Last frag in segment. */
46 struct frag *data_last_frag; /* Last frag in segment. */
47 static struct frag *bss_last_frag; /* Last frag in segment. */
50 static object_headers headers;
51 long string_byte_count;
52 static char *the_object_file;
53 char *next_object_file_charP; /* Tracks object file bytes. */
56 int magic_number_for_object_file = DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE;
59 #endif /* BFD_ASSEMBLER */
62 static fixS *fix_new_internal PARAMS ((fragS *, int where, int size,
63 symbolS *add, symbolS *sub,
64 offsetT offset, int pcrel,
65 bfd_reloc_code_real_type r_type));
67 static fixS *fix_new_internal PARAMS ((fragS *, int where, int size,
68 symbolS *add, symbolS *sub,
69 offsetT offset, int pcrel,
72 static long fixup_segment PARAMS ((fixS * fixP, segT this_segment_type));
73 static relax_addressT relax_align PARAMS ((relax_addressT addr, int align));
74 void relax_segment PARAMS ((struct frag * seg_frag_root, segT seg_type));
79 * Create a fixS in obstack 'notes'.
82 fix_new_internal (frag, where, size, add_symbol, sub_symbol, offset, pcrel,
84 fragS *frag; /* Which frag? */
85 int where; /* Where in that frag? */
86 int size; /* 1, 2, or 4 usually. */
87 symbolS *add_symbol; /* X_add_symbol. */
88 symbolS *sub_symbol; /* X_op_symbol. */
89 offsetT offset; /* X_add_number. */
90 int pcrel; /* TRUE if PC-relative relocation. */
92 bfd_reloc_code_real_type r_type; /* Relocation type */
94 int r_type; /* Relocation type */
99 fixP = (fixS *) obstack_alloc (¬es, sizeof (fixS));
101 fixP->fx_frag = frag;
102 fixP->fx_where = where;
103 fixP->fx_size = size;
104 fixP->fx_addsy = add_symbol;
105 fixP->fx_subsy = sub_symbol;
106 fixP->fx_offset = offset;
107 fixP->fx_pcrel = pcrel;
108 #if defined(NEED_FX_R_TYPE) || defined (BFD_ASSEMBLER)
109 fixP->fx_r_type = r_type;
111 fixP->fx_im_disp = 0;
112 fixP->fx_pcrel_adjust = 0;
113 fixP->fx_bit_fixP = 0;
114 fixP->fx_addnumber = 0;
123 /* Usually, we want relocs sorted numerically, but while
124 comparing to older versions of gas that have relocs
125 reverse sorted, it is convenient to have this compile
126 time option. xoxorich. */
131 fixS **seg_fix_rootP = & (seg_info (now_seg)->fix_root);
132 fixS **seg_fix_tailP = & (seg_info (now_seg)->fix_tail);
135 #ifdef REVERSE_SORT_RELOCS
137 fixP->fx_next = *seg_fix_rootP;
138 *seg_fix_rootP = fixP;
140 #else /* REVERSE_SORT_RELOCS */
142 fixP->fx_next = NULL;
145 (*seg_fix_tailP)->fx_next = fixP;
147 *seg_fix_rootP = fixP;
148 *seg_fix_tailP = fixP;
150 #endif /* REVERSE_SORT_RELOCS */
157 /* Create a fixup relative to a symbol (plus a constant). */
160 fix_new (frag, where, size, add_symbol, offset, pcrel, r_type)
161 fragS *frag; /* Which frag? */
162 int where; /* Where in that frag? */
163 short int size; /* 1, 2, or 4 usually. */
164 symbolS *add_symbol; /* X_add_symbol. */
165 offsetT offset; /* X_add_number. */
166 int pcrel; /* TRUE if PC-relative relocation. */
168 bfd_reloc_code_real_type r_type; /* Relocation type */
170 int r_type; /* Relocation type */
173 return fix_new_internal (frag, where, size, add_symbol,
174 (symbolS *) NULL, offset, pcrel, r_type);
177 /* Create a fixup for an expression. Currently we only support fixups
178 for difference expressions. That is itself more than most object
179 file formats support anyhow. */
182 fix_new_exp (frag, where, size, exp, pcrel, r_type)
183 fragS *frag; /* Which frag? */
184 int where; /* Where in that frag? */
185 short int size; /* 1, 2, or 4 usually. */
186 expressionS *exp; /* Expression. */
187 int pcrel; /* TRUE if PC-relative relocation. */
189 bfd_reloc_code_real_type r_type; /* Relocation type */
191 int r_type; /* Relocation type */
204 sub = exp->X_add_symbol;
205 off = exp->X_add_number;
209 sub = exp->X_op_symbol;
212 add = exp->X_add_symbol;
215 off = exp->X_add_number;
219 as_bad ("expression too complex for fixup");
222 return fix_new_internal (frag, where, size, add, sub, off,
226 /* Append a string onto another string, bumping the pointer along. */
228 append (charPP, fromP, length)
231 unsigned long length;
233 /* Don't trust memcpy() of 0 chars. */
237 memcpy (*charPP, fromP, (int) length);
241 #ifndef BFD_ASSEMBLER
242 int section_alignment[SEG_MAXIMUM_ORDINAL];
246 * This routine records the largest alignment seen for each segment.
247 * If the beginning of the segment is aligned on the worst-case
248 * boundary, all of the other alignments within it will work. At
249 * least one object format really uses this info.
252 record_alignment (seg, align)
253 /* Segment to which alignment pertains */
255 /* Alignment, as a power of 2 (e.g., 1 => 2-byte boundary, 2 => 4-byte
260 if (align > bfd_get_section_alignment (stdoutput, seg))
261 bfd_set_section_alignment (stdoutput, seg, align);
263 if (align > section_alignment[(int) seg])
264 section_alignment[(int) seg] = align;
268 #if defined (BFD_ASSEMBLER) || ! defined (BFD)
271 chain_frchains_together_1 (section, frchp)
273 struct frchain *frchp;
275 fragS dummy, *prev_frag = &dummy;
276 for (; frchp && frchp->frch_seg == section; frchp = frchp->frch_next)
278 prev_frag->fr_next = frchp->frch_root;
279 prev_frag = frchp->frch_last;
281 prev_frag->fr_next = 0;
290 chain_frchains_together (abfd, section, xxx)
291 bfd *abfd; /* unused */
293 char *xxx; /* unused */
295 segment_info_type *info;
297 /* BFD may have introduced its own sections without using
298 subseg_new, so it is possible that seg_info is NULL. */
299 info = seg_info (section);
300 if (info != (segment_info_type *) NULL)
301 chain_frchains_together_1 (section, info->frchainP);
306 #if !defined (BFD) && !defined (BFD_ASSEMBLER)
309 remove_subsegs (head, seg, root, last)
315 *root = head->frch_root;
316 *last = chain_frchains_together_1 (seg, head);
322 cvt_frag_to_fill (x, fragP)
333 object_headers *headers = x;
336 switch (fragP->fr_type)
341 HANDLE_ALIGN (fragP);
343 fragP->fr_type = rs_fill;
344 know (fragP->fr_var == 1);
345 know (fragP->fr_next != NULL);
347 fragP->fr_offset = (fragP->fr_next->fr_address
355 case rs_machine_dependent:
357 md_convert_frag (stdoutput, sec, fragP);
359 md_convert_frag (headers, fragP);
362 assert (fragP->fr_next == NULL || (fragP->fr_next->fr_address - fragP->fr_address == fragP->fr_fix));
365 * After md_convert_frag, we make the frag into a ".space 0".
366 * Md_convert_frag() should set up any fixSs and constants
372 #ifndef WORKING_DOT_WORD
375 struct broken_word *lie;
377 if (fragP->fr_subtype)
379 fragP->fr_fix += md_short_jump_size;
380 for (lie = (struct broken_word *) (fragP->fr_symbol);
381 lie && lie->dispfrag == fragP;
382 lie = lie->next_broken_word)
384 fragP->fr_fix += md_long_jump_size;
392 BAD_CASE (fragP->fr_type);
399 relax_and_size_seg (abfd, sec, xxx)
406 flags = bfd_get_section_flags (abfd, sec);
408 if (/*flags & SEC_ALLOC*/ 1)
411 segment_info_type *seginfo;
413 valueT size, newsize;
415 seginfo = (segment_info_type *) bfd_get_section_userdata (abfd, sec);
416 if (seginfo && seginfo->frchainP)
418 relax_segment (seginfo->frchainP->frch_root, sec);
419 for (fragp = seginfo->frchainP->frch_root; fragp; fragp = fragp->fr_next)
420 cvt_frag_to_fill (sec, fragp);
421 for (fragp = seginfo->frchainP->frch_root;
423 fragp = fragp->fr_next)
424 /* walk to last elt */;
425 size = fragp->fr_address + fragp->fr_fix;
431 flags |= SEC_HAS_CONTENTS;
432 /* @@ This is just an approximation. */
433 if (seginfo->fix_root)
437 x = bfd_set_section_flags (abfd, sec, flags);
440 size = md_section_align (sec, size);
441 x = bfd_set_section_size (abfd, sec, size);
444 /* If the size had to be rounded up, add some padding in the last
446 newsize = bfd_get_section_size_before_reloc (sec);
447 assert (newsize >= size);
450 fragS *last = seginfo->frchainP->frch_last;
451 fragp = seginfo->frchainP->frch_root;
452 while (fragp->fr_next != last)
453 fragp = fragp->fr_next;
454 last->fr_address = size;
455 fragp->fr_offset += newsize - size;
458 #ifdef tc_frob_section
459 tc_frob_section (sec);
461 #ifdef obj_frob_section
462 obj_frob_section (sec);
468 dump_section_relocs (abfd, sec, stream_)
473 FILE *stream = (FILE *) stream_;
474 segment_info_type *seginfo = seg_info (sec);
475 fixS *fixp = seginfo->fix_root;
480 fprintf (stream, "sec %s relocs:\n", sec->name);
483 symbolS *s = fixp->fx_addsy;
485 fprintf (stream, " %08x: %s(%s+%x)+%x\n", fixp,
486 S_GET_NAME (s), s->bsym->section->name,
487 S_GET_VALUE (s), fixp->fx_offset);
489 fprintf (stream, " %08x: type %d no sym\n", fixp, fixp->fx_r_type);
490 fixp = fixp->fx_next;
494 #define dump_section_relocs(ABFD,SEC,STREAM) (void)(ABFD,SEC,STREAM)
498 adjust_reloc_syms (abfd, sec, xxx)
503 segment_info_type *seginfo = seg_info (sec);
509 dump_section_relocs (abfd, sec, stderr);
511 for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next)
514 symbolS *sym = fixp->fx_addsy;
515 asection *symsec = sym->bsym->section;
516 segment_info_type *symseginfo = seg_info (symsec);
518 /* If it's one of these sections, assume the symbol is definitely
519 going to be output. */
520 if (symsec == &bfd_und_section
521 || symsec == &bfd_abs_section
522 || bfd_is_com_section (symsec))
525 /* Since we're reducing to section symbols, don't attempt to reduce
526 anything that's already using one. */
527 if (sym->bsym == symsec->symbol)
530 /* Is there some other reason we can't adjust this one? (E.g.,
531 call/bal links in i960-bout symbols.) */
532 #ifdef obj_fix_adjustable
533 if (! obj_fix_adjustable (fixp))
536 /* If the section symbol isn't going to be output, the relocs
537 at least should still work. If not, figure out what to do
538 when we run into that case. */
539 fixp->fx_offset += S_GET_VALUE (sym);
541 fixp->fx_offset += sym->sy_frag->fr_address;
543 fixp->fx_addsy = symseginfo->sym;
546 fixp->fx_addsy = symbol_find (symsec->name);
549 fixp->fx_addsy = symbol_make (symsec->name);
550 fixp->fx_addsy->bsym = symsec->symbol;
552 symseginfo->sym = fixp->fx_addsy;
556 dump_section_relocs (abfd, sec, stderr);
560 write_relocs (abfd, sec, xxx)
565 segment_info_type *seginfo = seg_info (sec);
566 unsigned long offset = 0;
572 /* If seginfo is NULL, we did not create this section; don't do
577 fixup_segment (seginfo->fix_root, sec);
580 for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next)
583 #ifndef RELOC_EXPANSION_POSSIBLE
584 /* Set up reloc information as well. */
585 relocs = (arelent **) bfd_alloc_by_size_t (stdoutput,
586 n * sizeof (arelent *));
587 memset ((char*)relocs, 0, n * sizeof (arelent*));
590 for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next)
593 extern arelent *tc_gen_reloc ();
595 bfd_reloc_status_type s;
597 if (fixp->fx_addsy == 0)
599 /* @@ Need some other flag to indicate which have already
604 reloc = tc_gen_reloc (sec, fixp);
610 data = fixp->fx_frag->fr_literal + fixp->fx_where;
611 /* @@ Assumes max size of reloc is 4. */
612 if (fixp->fx_where + 4
613 > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset)
615 /* Pass bogus address so that when bfd_perform_relocation adds
616 `address' back in, it'll come up with `data', which is where
617 we want it to operate. */
618 s = bfd_perform_relocation (stdoutput, reloc, data - reloc->address,
625 as_fatal ("bad return from bfd_perform_relocation");
630 n = n * MAX_RELOC_EXPANSION;
631 /* Set up reloc information as well. */
632 relocs = (arelent **) bfd_alloc_by_size_t (stdoutput,
633 n * sizeof (arelent *));
636 for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next)
639 extern arelent *tc_gen_reloc ();
641 bfd_reloc_status_type s;
644 if (fixp->fx_addsy == 0)
646 /* @@ Need some other flag to indicate which have already
651 reloc = tc_gen_reloc (sec, fixp);
653 for (j = 0; reloc[j]; j++)
655 relocs[i++] = reloc[j];
658 data = fixp->fx_frag->fr_literal + fixp->fx_where;
659 if (fixp->fx_where + 4
660 > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset)
662 for (j = 0; reloc[j]; j++)
664 s = bfd_perform_relocation (stdoutput, reloc[j], data - reloc[j]->address,
671 as_fatal ("bad return from bfd_perform_relocation");
679 bfd_set_reloc (stdoutput, sec, relocs, n);
681 bfd_set_section_flags (abfd, sec,
682 bfd_get_section_flags (abfd, sec) & ~SEC_RELOC);
688 fprintf (stderr, "relocs for sec %s\n", sec->name);
689 for (i = 0; i < n; i++)
693 fprintf (stderr, " reloc %2d @%08x off %4x : sym %-10s addend %x\n",
694 i, r, r->address, s->name, r->addend);
701 write_contents (abfd, sec, xxx)
706 segment_info_type *seginfo = seg_info (sec);
707 unsigned long offset = 0;
713 /* Write out the frags. */
714 if (! (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS))
717 for (frags = seginfo->frchainP->frch_root;
719 frags = frags->fr_next)
722 unsigned long fill_size;
726 assert (frags->fr_type == rs_fill);
729 x = bfd_set_section_contents (stdoutput, sec,
730 frags->fr_literal, offset,
733 offset += frags->fr_fix;
735 fill_literal = frags->fr_literal + frags->fr_fix;
736 fill_size = frags->fr_var;
737 count = frags->fr_offset;
739 if (fill_size && count)
742 x = bfd_set_section_contents (stdoutput, sec,
743 fill_literal, offset,
744 (bfd_size_type) fill_size);
753 merge_data_into_text ()
756 seg_info (text_section)->frchainP->frch_last->fr_next =
757 seg_info (data_section)->frchainP->frch_root;
758 seg_info (text_section)->frchainP->frch_last =
759 seg_info (data_section)->frchainP->frch_last;
760 seg_info (data_section)->frchainP = 0;
764 text_last_frag->fr_next = data_frag_root;
765 text_last_frag = data_last_frag;
766 data_last_frag = NULL;
767 data_frag_root = NULL;
770 for (tmp = text_fix_root; tmp->fx_next; tmp = tmp->fx_next);;
771 tmp->fx_next = data_fix_root;
772 text_fix_tail = data_fix_tail;
775 text_fix_root = data_fix_root;
776 data_fix_root = NULL;
780 #if !defined (BFD_ASSEMBLER) && !defined (BFD)
782 relax_and_size_all_segments ()
784 relax_segment (text_frag_root, SEG_TEXT);
785 relax_segment (data_frag_root, SEG_DATA);
786 relax_segment (bss_frag_root, SEG_BSS);
788 * Now the addresses of frags are correct within the segment.
791 know (text_last_frag->fr_type == rs_fill && text_last_frag->fr_offset == 0);
792 H_SET_TEXT_SIZE (&headers, text_last_frag->fr_address);
793 text_last_frag->fr_address = H_GET_TEXT_SIZE (&headers);
796 * Join the 2 segments into 1 huge segment.
797 * To do this, re-compute every rn_address in the SEG_DATA frags.
798 * Then join the data frags after the text frags.
800 * Determine a_data [length of data segment].
804 register relax_addressT slide;
806 know ((text_last_frag->fr_type == rs_fill) && (text_last_frag->fr_offset == 0));
808 H_SET_DATA_SIZE (&headers, data_last_frag->fr_address);
809 data_last_frag->fr_address = H_GET_DATA_SIZE (&headers);
810 slide = H_GET_TEXT_SIZE (&headers); /* & in file of the data segment. */
812 #define RoundUp(N,S) (((N)+(S)-1)&-(S))
813 /* For b.out: If the data section has a strict alignment
814 requirement, its load address in the .o file will be
815 rounded up from the size of the text section. These
816 two values are *not* the same! Similarly for the bss
818 slide = RoundUp (slide, 1 << section_alignment[SEG_DATA]);
821 for (fragP = data_frag_root; fragP; fragP = fragP->fr_next)
823 fragP->fr_address += slide;
824 } /* for each data frag */
826 know (text_last_frag != 0);
827 text_last_frag->fr_next = data_frag_root;
831 H_SET_DATA_SIZE (&headers, 0);
835 /* See above comments on b.out data section address. */
838 if (data_last_frag == 0)
839 bss_vma = H_GET_TEXT_SIZE (&headers);
841 bss_vma = data_last_frag->fr_address;
842 bss_vma = RoundUp (bss_vma, 1 << section_alignment[SEG_BSS]);
843 bss_address_frag.fr_address = bss_vma;
845 #else /* ! OBJ_BOUT */
846 bss_address_frag.fr_address = (H_GET_TEXT_SIZE (&headers) +
847 H_GET_DATA_SIZE (&headers));
850 /* Slide all the frags */
853 relax_addressT slide = bss_address_frag.fr_address;
855 for (fragP = bss_frag_root; fragP; fragP = fragP->fr_next)
857 fragP->fr_address += slide;
858 } /* for each bss frag */
861 #endif /* ! OBJ_BOUT */
864 H_SET_BSS_SIZE (&headers,
865 bss_last_frag->fr_address - bss_frag_root->fr_address);
867 H_SET_BSS_SIZE (&headers, 0);
869 #endif /* ! BFD_ASSEMBLER && ! BFD */
871 #if defined (BFD_ASSEMBLER) || !defined (BFD)
876 register struct frchain *frchainP; /* Track along all frchains. */
877 register fragS *fragP; /* Track along all frags. */
878 #if !defined (BFD_ASSEMBLER) && !defined (OBJ_VMS)
879 long object_file_size;
882 /* Do we really want to write it? */
885 n_warns = had_warnings ();
886 n_errs = had_errors ();
887 /* The -Z flag indicates that an object file should be generated,
888 regardless of warnings and errors. */
891 if (n_warns || n_errs)
892 as_warn ("%d error%s, %d warning%s, generating bad object file.\n",
893 n_errs, n_errs == 1 ? "" : "s",
894 n_warns, n_warns == 1 ? "" : "s");
899 as_fatal ("%d error%s, %d warning%s, no object file generated.\n",
900 n_errs, n_errs == 1 ? "" : "s",
901 n_warns, n_warns == 1 ? "" : "s");
907 * Under VMS we try to be compatible with VAX-11 "C". Thus, we
908 * call a routine to check for the definition of the procedure
909 * "_main", and if so -- fix it up so that it can be program
912 VMS_Check_For_Main ();
915 /* After every sub-segment, we fake an ".align ...". This conforms to
916 BSD4.2 brane-damage. We then fake ".fill 0" because that is the kind of
917 frag that requires least thought. ".align" frags like to have a
918 following frag since that makes calculating their intended length
921 @@ Is this really necessary?? */
922 #ifndef SUB_SEGMENT_ALIGN
924 #define SUB_SEGMENT_ALIGN(SEG) (0)
926 #define SUB_SEGMENT_ALIGN(SEG) (2)
929 for (frchainP = frchain_root; frchainP; frchainP = frchainP->frch_next)
932 subseg_set (frchainP->frch_seg, frchainP->frch_subseg);
934 subseg_new (frchainP->frch_seg, frchainP->frch_subseg);
936 frag_align (SUB_SEGMENT_ALIGN (now_seg), NOP_OPCODE);
937 /* frag_align will have left a new frag.
938 Use this last frag for an empty ".fill".
941 Create a last frag. Do not leave a "being filled in frag". */
942 frag_wane (frag_now);
943 frag_now->fr_fix = 0;
944 know (frag_now->fr_next == NULL);
947 /* From now on, we don't care about sub-segments. Build one frag chain
948 for each segment. Linked thru fr_next. */
951 /* Remove the sections created by gas for its own purposes. */
953 asection **seclist, *sec;
954 seclist = &stdoutput->sections;
955 while (seclist && *seclist)
958 while (sec == reg_section || sec == expr_section)
962 stdoutput->section_count--;
967 seclist = &(*seclist)->next;
971 bfd_map_over_sections (stdoutput, chain_frchains_together, (char *) 0);
973 remove_subsegs (frchain_root, SEG_TEXT, &text_frag_root, &text_last_frag);
974 remove_subsegs (data0_frchainP, SEG_DATA, &data_frag_root, &data_last_frag);
975 remove_subsegs (bss0_frchainP, SEG_BSS, &bss_frag_root, &bss_last_frag);
978 /* We have two segments. If user gave -R flag, then we must put the
979 data frags into the text segment. Do this before relaxing so
980 we know to take advantage of -R and make shorter addresses. */
981 #if !defined (OBJ_AOUT) || defined (BFD_ASSEMBLER)
984 merge_data_into_text ();
989 bfd_map_over_sections (stdoutput, relax_and_size_seg, (char *) 0);
991 relax_and_size_all_segments ();
992 #endif /* BFD_ASSEMBLER */
994 #ifndef BFD_ASSEMBLER
997 * Crawl the symbol chain.
999 * For each symbol whose value depends on a frag, take the address of
1000 * that frag and subsume it into the value of the symbol.
1001 * After this, there is just one way to lookup a symbol value.
1002 * Values are left in their final state for object file emission.
1003 * We adjust the values of 'L' local symbols, even if we do
1004 * not intend to emit them to the object file, because their values
1005 * are needed for fix-ups.
1007 * Unless we saw a -L flag, remove all symbols that begin with 'L'
1008 * from the symbol chain. (They are still pointed to by the fixes.)
1010 * Count the remaining symbols.
1011 * Assign a symbol number to each symbol.
1012 * Count the number of string-table chars we will emit.
1013 * Put this info into the headers as appropriate.
1016 know (zero_address_frag.fr_address == 0);
1017 string_byte_count = sizeof (string_byte_count);
1019 obj_crawl_symbol_chain (&headers);
1021 if (string_byte_count == sizeof (string_byte_count))
1022 string_byte_count = 0;
1024 H_SET_STRING_SIZE (&headers, string_byte_count);
1027 * Addresses of frags now reflect addresses we use in the object file.
1028 * Symbol values are correct.
1029 * Scan the frags, converting any ".org"s and ".align"s to ".fill"s.
1030 * Also converting any machine-dependent frags using md_convert_frag();
1032 subseg_change (SEG_TEXT, 0);
1034 for (fragP = text_frag_root; fragP; fragP = fragP->fr_next)
1036 cvt_frag_to_fill (&headers, fragP);
1038 /* Some assert macros don't work with # directives mixed in. */
1040 if (!(fragP->fr_next == NULL
1042 || fragP->fr_next == data_frag_root
1044 || ((fragP->fr_next->fr_address - fragP->fr_address)
1045 == (fragP->fr_fix + fragP->fr_offset * fragP->fr_var))))
1049 #endif /* ! BFD_ASSEMBLER */
1051 #ifndef WORKING_DOT_WORD
1053 struct broken_word *lie;
1054 struct broken_word **prevP;
1056 prevP = &broken_words;
1057 for (lie = broken_words; lie; lie = lie->next_broken_word)
1062 exp.X_op = O_subtract;
1063 exp.X_add_symbol = lie->add;
1064 exp.X_op_symbol = lie->sub;
1065 exp.X_add_number = lie->addnum;
1066 #ifdef BFD_ASSEMBLER
1067 fix_new_exp (lie->frag,
1068 lie->word_goes_here - lie->frag->fr_literal,
1069 2, &exp, 0, BFD_RELOC_NONE);
1071 #if defined(TC_SPARC) || defined(TC_A29K) || defined(NEED_FX_R_TYPE)
1072 fix_new_exp (lie->frag,
1073 lie->word_goes_here - lie->frag->fr_literal,
1074 2, &exp, 0, NO_RELOC);
1077 fix_new_ns32k_exp (lie->frag,
1078 lie->word_goes_here - lie->frag->fr_literal,
1079 2, &exp, 0, 0, 2, 0, 0);
1081 fix_new_exp (lie->frag,
1082 lie->word_goes_here - lie->frag->fr_literal,
1084 #endif /* TC_NS32K */
1085 #endif /* TC_SPARC|TC_A29K|NEED_FX_R_TYPE */
1086 #endif /* BFD_ASSEMBLER */
1087 *prevP = lie->next_broken_word;
1090 prevP = &(lie->next_broken_word);
1092 for (lie = broken_words; lie;)
1094 struct broken_word *untruth;
1096 addressT table_addr;
1097 addressT from_addr, to_addr;
1100 fragP = lie->dispfrag;
1102 /* Find out how many broken_words go here. */
1104 for (untruth = lie; untruth && untruth->dispfrag == fragP; untruth = untruth->next_broken_word)
1105 if (untruth->added == 1)
1108 table_ptr = lie->dispfrag->fr_opcode;
1109 table_addr = lie->dispfrag->fr_address + (table_ptr - lie->dispfrag->fr_literal);
1110 /* Create the jump around the long jumps. This is a short
1111 jump from table_ptr+0 to table_ptr+n*long_jump_size. */
1112 from_addr = table_addr;
1113 to_addr = table_addr + md_short_jump_size + n * md_long_jump_size;
1114 md_create_short_jump (table_ptr, from_addr, to_addr, lie->dispfrag, lie->add);
1115 table_ptr += md_short_jump_size;
1116 table_addr += md_short_jump_size;
1118 for (m = 0; lie && lie->dispfrag == fragP; m++, lie = lie->next_broken_word)
1120 if (lie->added == 2)
1122 /* Patch the jump table */
1123 /* This is the offset from ??? to table_ptr+0 */
1124 to_addr = table_addr - S_GET_VALUE (lie->sub);
1125 md_number_to_chars (lie->word_goes_here, to_addr, 2);
1126 for (untruth = lie->next_broken_word; untruth && untruth->dispfrag == fragP; untruth = untruth->next_broken_word)
1128 if (untruth->use_jump == lie)
1129 md_number_to_chars (untruth->word_goes_here, to_addr, 2);
1132 /* Install the long jump */
1133 /* this is a long jump from table_ptr+0 to the final target */
1134 from_addr = table_addr;
1135 to_addr = S_GET_VALUE (lie->add) + lie->addnum;
1136 md_create_long_jump (table_ptr, from_addr, to_addr, lie->dispfrag, lie->add);
1137 table_ptr += md_long_jump_size;
1138 table_addr += md_long_jump_size;
1142 #endif /* not WORKING_DOT_WORD */
1144 #ifndef BFD_ASSEMBLER
1148 * Scan every FixS performing fixups. We had to wait until now to do
1149 * this because md_convert_frag() may have made some fixSs.
1153 subseg_change (SEG_TEXT, 0);
1154 trsize = md_reloc_size * fixup_segment (text_fix_root, SEG_TEXT);
1155 subseg_change (SEG_DATA, 0);
1156 drsize = md_reloc_size * fixup_segment (data_fix_root, SEG_DATA);
1157 H_SET_RELOCATION_SIZE (&headers, trsize, drsize);
1159 /* FIXME move this stuff into the pre-write-hook */
1160 H_SET_MAGIC_NUMBER (&headers, magic_number_for_object_file);
1161 H_SET_ENTRY_POINT (&headers, 0);
1163 obj_pre_write_hook (&headers); /* extra coff stuff */
1165 object_file_size = H_GET_FILE_SIZE (&headers);
1166 next_object_file_charP = the_object_file = xmalloc (object_file_size);
1168 output_file_create (out_file_name);
1170 obj_header_append (&next_object_file_charP, &headers);
1172 know ((next_object_file_charP - the_object_file) == H_GET_HEADER_SIZE (&headers));
1177 for (fragP = text_frag_root; fragP; fragP = fragP->fr_next)
1179 register long count;
1180 register char *fill_literal;
1181 register long fill_size;
1183 know (fragP->fr_type == rs_fill);
1184 append (&next_object_file_charP, fragP->fr_literal, (unsigned long) fragP->fr_fix);
1185 fill_literal = fragP->fr_literal + fragP->fr_fix;
1186 fill_size = fragP->fr_var;
1187 know (fragP->fr_offset >= 0);
1189 for (count = fragP->fr_offset; count; count--)
1191 append (&next_object_file_charP, fill_literal, (unsigned long) fill_size);
1194 } /* for each code frag. */
1196 know ((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE (&headers) + H_GET_TEXT_SIZE (&headers) + H_GET_DATA_SIZE (&headers)));
1201 obj_emit_relocations (&next_object_file_charP, text_fix_root, (relax_addressT) 0);
1202 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)));
1204 /* Make addresses in data relocation directives relative to beginning of
1205 * first data fragment, not end of last text fragment: alignment of the
1206 * start of the data segment may place a gap between the segments.
1208 obj_emit_relocations (&next_object_file_charP, data_fix_root, data0_frchainP->frch_root->fr_address);
1210 obj_emit_relocations (&next_object_file_charP, data_fix_root, text_last_frag->fr_address);
1211 #endif /* TC_I960 */
1213 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)));
1216 * Emit line number entries.
1218 OBJ_EMIT_LINENO (&next_object_file_charP, lineno_rootP, the_object_file);
1219 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)));
1224 obj_emit_symbols (&next_object_file_charP, symbol_rootP);
1225 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)));
1231 if (string_byte_count > 0)
1233 obj_emit_strings (&next_object_file_charP);
1234 } /* only if we have a string table */
1237 bfd_seek (stdoutput, 0, 0);
1238 bfd_write (the_object_file, 1, object_file_size, stdoutput);
1241 /* Write the data to the file */
1242 output_file_append (the_object_file, object_file_size, out_file_name);
1245 output_file_close (out_file_name);
1246 } /* non vms output */
1249 * Now do the VMS-dependent part of writing the object file
1251 VMS_write_object_file (H_GET_TEXT_SIZE (&headers),
1252 H_GET_DATA_SIZE (&headers),
1253 H_GET_BSS_SIZE (&headers),
1254 text_frag_root, data_frag_root);
1256 #else /* BFD_ASSEMBLER */
1258 #ifdef obj_check_file_symbols
1259 obj_check_file_symbols ();
1262 bfd_map_over_sections (stdoutput, adjust_reloc_syms, (char *)0);
1264 /* Set up symbol table, and write it out. */
1270 for (symp = symbol_rootP; symp; symp = symbol_next (symp))
1274 if (! symp->sy_resolved)
1276 if (symp->sy_value.X_op == O_constant)
1278 /* This is the normal case; skip the call. */
1281 + symp->sy_frag->fr_address));
1282 symp->sy_resolved = 1;
1285 resolve_symbol_value (symp);
1288 /* So far, common symbols have been treated like undefined symbols.
1289 Put them in the common section now. */
1290 if (S_IS_DEFINED (symp) == 0
1291 && S_GET_VALUE (symp) != 0)
1292 S_SET_SEGMENT (symp, &bfd_com_section);
1294 printf ("symbol `%s'\n\t@%x: value=%d flags=%x seg=%s\n",
1295 S_GET_NAME (symp), symp,
1298 segment_name (symp->bsym->section));
1302 #ifdef obj_frob_symbol
1303 obj_frob_symbol (symp, punt);
1307 #ifdef tc_frob_symbol
1308 tc_frob_symbol (symp, punt);
1313 /* If we don't want to keep this symbol, splice it out of the
1315 if (S_IS_LOCAL (symp))
1317 symbolS *prev, *next;
1319 prev = symbol_previous (symp);
1320 next = symbol_next (symp);
1322 verify_symbol_chain_2 (symp);
1326 symbol_next (prev) = next;
1329 else if (symp == symbol_rootP)
1330 symbol_rootP = next;
1334 symbol_previous (next) = prev;
1336 symbol_lastP = prev;
1339 verify_symbol_chain_2 (prev);
1341 verify_symbol_chain_2 (next);
1346 /* Set the value into the BFD symbol. Up til now the value
1347 has only been kept in the gas symbolS struct. */
1348 symp->bsym->value = S_GET_VALUE (symp);
1357 extern PTR bfd_alloc PARAMS ((bfd *, size_t));
1359 asympp = (asymbol **) bfd_alloc (stdoutput,
1360 n * sizeof (asymbol *));
1361 symp = symbol_rootP;
1362 for (i = 0; i < n; i++, symp = symbol_next (symp))
1364 asympp[i] = symp->bsym;
1367 result = bfd_set_symtab (stdoutput, asympp, n);
1368 assert (result == true);
1373 #ifdef obj_frob_file
1374 /* If obj_frob_file changes the symbol value at this point, it is
1375 responsible for moving the changed value into symp->bsym->value
1376 as well. Hopefully all symbol value changing can be done in
1377 {obj,tc}_frob_symbol. */
1381 /* Now that all the sizes are known, and contents correct, we can
1382 start writing the file. */
1383 bfd_map_over_sections (stdoutput, write_relocs, (char *) 0);
1385 bfd_map_over_sections (stdoutput, write_contents, (char *) 0);
1387 output_file_close (out_file_name);
1388 #endif /* BFD_ASSEMBLER */
1395 * Now we have a segment, not a crowd of sub-segments, we can make fr_address
1400 * After this, all frags in this segment have addresses that are correct
1401 * within the segment. Since segments live in different file addresses,
1402 * these frag addresses may not be the same as final object-file addresses.
1405 /* Subroutines of relax_segment. */
1411 for (; f1; f1 = f1->fr_next)
1412 if (f1->fr_next == f2)
1417 /* Relax_align. Advance location counter to next address that has 'alignment'
1418 lowest order bits all 0s, return size of adjustment made. */
1419 static relax_addressT
1420 relax_align (address, alignment)
1421 register relax_addressT address; /* Address now. */
1422 register int alignment; /* Alignment (binary). */
1424 relax_addressT mask;
1425 relax_addressT new_address;
1427 mask = ~((~0) << alignment);
1428 new_address = (address + mask) & (~mask);
1430 /* We must provide lots of padding, so the linker can discard it
1431 when needed. The linker will not add extra space, ever. */
1432 new_address += (1 << alignment);
1433 return (new_address - address);
1437 relax_segment (segment_frag_root, segment)
1438 struct frag *segment_frag_root;
1441 register struct frag *fragP;
1442 register relax_addressT address;
1443 #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER)
1444 know (segment == SEG_DATA || segment == SEG_TEXT || segment == SEG_BSS);
1446 /* In case md_estimate_size_before_relax() wants to make fixSs. */
1447 subseg_change (segment, 0);
1449 /* For each frag in segment: count and store (a 1st guess of)
1452 for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next)
1454 fragP->fr_address = address;
1455 address += fragP->fr_fix;
1457 switch (fragP->fr_type)
1460 address += fragP->fr_offset * fragP->fr_var;
1464 address += relax_align (address, (int) fragP->fr_offset);
1468 /* Assume .org is nugatory. It will grow with 1st relax. */
1471 case rs_machine_dependent:
1472 address += md_estimate_size_before_relax (fragP, segment);
1475 #ifndef WORKING_DOT_WORD
1476 /* Broken words don't concern us yet */
1477 case rs_broken_word:
1482 BAD_CASE (fragP->fr_type);
1484 } /* switch(fr_type) */
1485 } /* for each frag in the segment */
1489 long stretch; /* May be any size, 0 or negative. */
1490 /* Cumulative number of addresses we have */
1491 /* relaxed this pass. */
1492 /* We may have relaxed more than one address. */
1493 long stretched; /* Have we stretched on this pass? */
1494 /* This is 'cuz stretch may be zero, when, in fact some piece of code
1495 grew, and another shrank. If a branch instruction doesn't fit anymore,
1496 we could be scrod. */
1500 stretch = stretched = 0;
1501 for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next)
1504 unsigned long was_address;
1511 was_address = fragP->fr_address;
1512 address = fragP->fr_address += stretch;
1513 symbolP = fragP->fr_symbol;
1514 offset = fragP->fr_offset;
1516 switch (fragP->fr_type)
1518 case rs_fill: /* .fill never relaxes. */
1522 #ifndef WORKING_DOT_WORD
1523 /* JF: This is RMS's idea. I do *NOT* want to be blamed
1524 for it I do not want to write it. I do not want to have
1525 anything to do with it. This is not the proper way to
1526 implement this misfeature. */
1527 case rs_broken_word:
1529 struct broken_word *lie;
1530 struct broken_word *untruth;
1532 /* Yes this is ugly (storing the broken_word pointer
1533 in the symbol slot). Still, this whole chunk of
1534 code is ugly, and I don't feel like doing anything
1535 about it. Think of it as stubbornness in action. */
1537 for (lie = (struct broken_word *) (fragP->fr_symbol);
1538 lie && lie->dispfrag == fragP;
1539 lie = lie->next_broken_word)
1545 offset = (lie->add->sy_frag->fr_address
1546 + S_GET_VALUE (lie->add)
1548 - (lie->sub->sy_frag->fr_address
1549 + S_GET_VALUE (lie->sub)));
1550 if (offset <= -32768 || offset >= 32767)
1555 sprint_value (buf, lie->addnum);
1556 as_warn (".word %s-%s+%s didn't fit",
1557 S_GET_NAME (lie->add),
1558 S_GET_NAME (lie->sub),
1562 if (fragP->fr_subtype == 0)
1564 fragP->fr_subtype++;
1565 growth += md_short_jump_size;
1567 for (untruth = lie->next_broken_word;
1568 untruth && untruth->dispfrag == lie->dispfrag;
1569 untruth = untruth->next_broken_word)
1570 if ((untruth->add->sy_frag == lie->add->sy_frag)
1571 && S_GET_VALUE (untruth->add) == S_GET_VALUE (lie->add))
1574 untruth->use_jump = lie;
1576 growth += md_long_jump_size;
1581 } /* case rs_broken_word */
1584 growth = (relax_align ((relax_addressT) (address
1587 - relax_align ((relax_addressT) (was_address
1597 #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER)
1598 know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE)
1599 || (S_GET_SEGMENT (symbolP) == SEG_DATA)
1600 || (S_GET_SEGMENT (symbolP) == SEG_TEXT)
1601 || S_GET_SEGMENT (symbolP) == SEG_BSS);
1602 know (symbolP->sy_frag);
1603 know (!(S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE)
1604 || (symbolP->sy_frag == &zero_address_frag));
1606 target += S_GET_VALUE (symbolP)
1607 + symbolP->sy_frag->fr_address;
1608 } /* if we have a symbol */
1610 know (fragP->fr_next);
1611 after = fragP->fr_next->fr_address;
1612 growth = ((target - after) > 0) ? (target - after) : 0;
1613 /* Growth may be negative, but variable part of frag
1614 cannot have fewer than 0 chars. That is, we can't
1617 growth -= stretch; /* This is an absolute growth factor */
1620 case rs_machine_dependent:
1622 const relax_typeS *this_type;
1623 const relax_typeS *start_type;
1624 relax_substateT next_state;
1625 relax_substateT this_state;
1627 this_state = fragP->fr_subtype;
1628 start_type = this_type = md_relax_table + this_state;
1633 #if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER)
1634 know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE)
1635 || (S_GET_SEGMENT (symbolP) == SEG_DATA)
1636 || (S_GET_SEGMENT (symbolP) == SEG_BSS)
1637 || (S_GET_SEGMENT (symbolP) == SEG_TEXT));
1639 know (symbolP->sy_frag);
1640 know (!(S_GET_SEGMENT (symbolP) == absolute_section)
1641 || symbolP->sy_frag == &zero_address_frag);
1643 S_GET_VALUE (symbolP)
1644 + symbolP->sy_frag->fr_address;
1646 /* If frag has yet to be reached on this pass,
1647 assume it will move by STRETCH just as we did.
1648 If this is not so, it will be because some frag
1649 between grows, and that will force another pass.
1651 Beware zero-length frags.
1653 There should be a faster way to do this. */
1655 if (symbolP->sy_frag->fr_address >= was_address
1656 && is_dnrange (fragP, symbolP->sy_frag))
1662 aim = target - address - fragP->fr_fix;
1663 /* The displacement is affected by the instruction size
1664 for the 32k architecture. I think we ought to be able
1665 to add fragP->fr_pcrel_adjust in all cases (it should be
1666 zero if not used), but just in case it breaks something
1667 else we'll put this inside #ifdef NS32K ... #endif */
1669 if (fragP->fr_pcrel_adjust)
1672 aim += fragP->fr_pcrel_adjust;
1676 /* Look backwards. */
1677 for (next_state = this_type->rlx_more; next_state;)
1678 if (aim >= this_type->rlx_backward)
1682 /* Grow to next state. */
1683 this_state = next_state;
1684 this_type = md_relax_table + this_state;
1685 next_state = this_type->rlx_more;
1690 #ifdef M68K_AIM_KLUDGE
1691 M68K_AIM_KLUDGE (aim, this_state, this_type);
1693 /* Look forwards. */
1694 for (next_state = this_type->rlx_more; next_state;)
1695 if (aim <= this_type->rlx_forward)
1699 /* Grow to next state. */
1700 this_state = next_state;
1701 this_type = md_relax_table + this_state;
1702 next_state = this_type->rlx_more;
1706 growth = this_type->rlx_length - start_type->rlx_length;
1708 fragP->fr_subtype = this_state;
1713 BAD_CASE (fragP->fr_type);
1721 } /* For each frag in the segment. */
1723 while (stretched); /* Until nothing further to relax. */
1727 * We now have valid fr_address'es for each frag.
1731 * All fr_address's are correct, relative to their own segment.
1732 * We have made all the fixS we will ever make.
1734 } /* relax_segment() */
1738 Go through all the fixS's in a segment and see which ones can be
1739 handled now. (These consist of fixS where we have since discovered
1740 the value of a symbol, or the address of the frag involved.)
1741 For each one, call md_apply_fix to put the fix into the frag data.
1743 Result is a count of how many relocation structs will be needed to
1744 handle the remaining fixS's that we couldn't completely handle here.
1745 These will be output later by emit_relocations(). */
1748 fixup_segment (fixP, this_segment_type)
1749 register fixS *fixP;
1750 segT this_segment_type; /* N_TYPE bits for segment. */
1752 register long seg_reloc_count;
1753 register symbolS *add_symbolP;
1754 register symbolS *sub_symbolP;
1757 register char *place;
1758 register long where;
1759 register char pcrel;
1760 register fragS *fragP;
1761 register segT add_symbol_segment = absolute_section;
1763 seg_reloc_count = 0;
1764 /* If the linker is doing the relaxing, we must not do any fixups */
1766 for (; fixP; fixP = fixP->fx_next)
1769 for (; fixP; fixP = fixP->fx_next)
1771 fragP = fixP->fx_frag;
1773 where = fixP->fx_where;
1774 place = fragP->fr_literal + where;
1775 size = fixP->fx_size;
1776 add_symbolP = fixP->fx_addsy;
1778 if (fixP->fx_callj && TC_S_IS_CALLNAME (add_symbolP))
1780 /* Relocation should be done via the associated 'bal'
1781 entry point symbol. */
1783 if (!TC_S_IS_BALNAME (tc_get_bal_of_call (add_symbolP)))
1785 as_bad ("No 'bal' entry point for leafproc %s",
1786 S_GET_NAME (add_symbolP));
1789 fixP->fx_addsy = add_symbolP = tc_get_bal_of_call (add_symbolP);
1792 sub_symbolP = fixP->fx_subsy;
1793 add_number = fixP->fx_offset;
1794 pcrel = fixP->fx_pcrel;
1797 add_symbol_segment = S_GET_SEGMENT (add_symbolP);
1804 if (S_GET_SEGMENT (sub_symbolP) != absolute_section)
1805 as_bad ("Negative of non-absolute symbol %s",
1806 S_GET_NAME (sub_symbolP));
1808 add_number -= S_GET_VALUE (sub_symbolP);
1810 else if ((S_GET_SEGMENT (sub_symbolP) == add_symbol_segment)
1811 && (SEG_NORMAL (add_symbol_segment)
1812 || (add_symbol_segment == absolute_section)))
1814 /* Difference of 2 symbols from same segment.
1815 Can't make difference of 2 undefineds: 'value' means
1816 something different for N_UNDF. */
1818 /* Makes no sense to use the difference of 2 arbitrary symbols
1819 as the target of a call instruction. */
1822 as_bad ("callj to difference of 2 symbols");
1824 #endif /* TC_I960 */
1825 add_number += S_GET_VALUE (add_symbolP) -
1826 S_GET_VALUE (sub_symbolP);
1829 fixP->fx_addsy = NULL;
1833 /* Different segments in subtraction. */
1834 know (!(S_IS_EXTERNAL (sub_symbolP)
1835 && (S_GET_SEGMENT (sub_symbolP) == absolute_section)));
1837 if ((S_GET_SEGMENT (sub_symbolP) == absolute_section))
1839 add_number -= S_GET_VALUE (sub_symbolP);
1844 sprint_value (buf, fragP->fr_address + where);
1845 as_bad ("Can't emit reloc {- %s-seg symbol \"%s\"} @ file address %s.",
1846 segment_name (S_GET_SEGMENT (sub_symbolP)),
1847 S_GET_NAME (sub_symbolP), buf);
1854 if (add_symbol_segment == this_segment_type && pcrel)
1857 * This fixup was made when the symbol's segment was
1858 * SEG_UNKNOWN, but it is now in the local segment.
1859 * So we know how to do the address without relocation.
1862 /* reloc_callj() may replace a 'call' with a 'calls' or a
1863 'bal', in which cases it modifies *fixP as appropriate.
1864 In the case of a 'calls', no further work is required,
1865 and *fixP has been set up to make the rest of the code
1868 #endif /* TC_I960 */
1870 add_number += S_GET_VALUE (add_symbolP);
1871 add_number -= md_pcrel_from (fixP);
1872 pcrel = 0; /* Lie. Don't want further pcrel processing. */
1873 fixP->fx_addsy = NULL; /* No relocations please. */
1877 if (add_symbol_segment == absolute_section)
1880 /* See comment about reloc_callj() above. */
1882 #endif /* TC_I960 */
1883 add_number += S_GET_VALUE (add_symbolP);
1884 fixP->fx_addsy = NULL;
1887 else if (add_symbol_segment == undefined_section
1888 #ifdef BFD_ASSEMBLER
1889 || add_symbol_segment == &bfd_com_section
1894 if ((int) fixP->fx_bit_fixP == 13)
1896 /* This is a COBR instruction. They have only a
1897 * 13-bit displacement and are only to be used
1898 * for local branches: flag as error, don't generate
1901 as_bad ("can't use COBR format with external label");
1902 fixP->fx_addsy = NULL; /* No relocations please. */
1905 #endif /* TC_I960 */
1909 if (S_IS_COMMON (add_symbolP))
1910 add_number += S_GET_VALUE (add_symbolP);
1911 #endif /* TE_I386AIX */
1912 #endif /* OBJ_COFF */
1918 add_number += S_GET_VALUE (add_symbolP);
1920 } /* if not in local seg */
1921 } /* if there was a + symbol */
1925 add_number -= md_pcrel_from (fixP);
1926 if (add_symbolP == 0)
1928 fixP->fx_addsy = &abs_symbol;
1930 } /* if there's an add_symbol */
1933 if (!fixP->fx_bit_fixP)
1936 && (add_number & ~0xFF)
1937 && ((add_number & ~0xFF) != (-1 & ~0xFF)))
1939 && (add_number & ~0xFFFF)
1940 && ((add_number & ~0xFFFF) != (-1 & ~0xFFFF)))
1942 && (add_number & ~(valueT)0xFFFFFFFF)
1943 && ((add_number & ~(valueT)0xFFFFFFFF) != (-1 & ~(valueT)0xFFFFFFFF)))
1947 sprint_value (buf, fragP->fr_address + where);
1948 as_bad ("Value of %d too large for field of %d bytes at %s",
1949 add_number, size, buf);
1950 } /* generic error checking */
1951 #ifdef WARN_SIGNED_OVERFLOW_WORD
1952 /* Warn if a .word value is too large when treated as a signed
1953 number. We already know it is not too negative. This is to
1954 catch over-large switches generated by gcc on the 68k. */
1957 && add_number > 0x7fff)
1958 as_bad ("Signed .word overflow; switch may be too large; %d at 0x%x",
1959 add_number, fragP->fr_address + where);
1961 } /* not a bit fix */
1963 #ifdef BFD_ASSEMBLER
1964 md_apply_fix (fixP, &add_number);
1966 md_apply_fix (fixP, add_number);
1968 } /* For each fixS in this segment. */
1975 /* two relocs per callj under coff. */
1976 for (fixP = topP; fixP; fixP = fixP->fx_next)
1978 if (fixP->fx_callj && fixP->fx_addsy != 0)
1981 } /* if callj and not already fixed. */
1982 } /* for each fix */
1984 #endif /* TC_I960 */
1986 #endif /* OBJ_COFF */
1987 return (seg_reloc_count);
1990 /* end of write.c */