1 /* BFD back-end for Intel 960 b.out binaries.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
3 Written by Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program 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 of the License, or
10 (at your option) any later version.
12 This program 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 this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
29 #include "aout/stab_gnu.h"
30 #include "libaout.h" /* BFD a.out internal data structures */
33 static int aligncode PARAMS ((bfd *abfd, asection *input_section,
34 arelent *r, unsigned int shrink));
35 static void perform_slip PARAMS ((bfd *abfd, unsigned int slip,
36 asection *input_section, bfd_vma value));
37 static boolean b_out_squirt_out_relocs PARAMS ((bfd *abfd, asection *section));
38 static const bfd_target *b_out_callback PARAMS ((bfd *));
39 static bfd_reloc_status_type calljx_callback
40 PARAMS ((bfd *, struct bfd_link_info *, arelent *, PTR src, PTR dst,
42 static bfd_reloc_status_type callj_callback
43 PARAMS ((bfd *, struct bfd_link_info *, arelent *, PTR data,
44 unsigned int srcidx, unsigned int dstidx, asection *, boolean));
45 static bfd_vma get_value PARAMS ((arelent *, struct bfd_link_info *,
47 static int abs32code PARAMS ((bfd *, asection *, arelent *,
48 unsigned int, struct bfd_link_info *));
49 static boolean b_out_bfd_relax_section PARAMS ((bfd *, asection *,
50 struct bfd_link_info *,
52 static bfd_byte *b_out_bfd_get_relocated_section_contents
53 PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *,
54 bfd_byte *, boolean, asymbol **));
56 /* Swaps the information in an executable header taken from a raw byte
57 stream memory image, into the internal exec_header structure. */
60 bout_swap_exec_header_in (abfd, raw_bytes, execp)
62 struct external_exec *raw_bytes;
63 struct internal_exec *execp;
65 struct external_exec *bytes = (struct external_exec *)raw_bytes;
67 /* Now fill in fields in the execp, from the bytes in the raw data. */
68 execp->a_info = bfd_h_get_32 (abfd, bytes->e_info);
69 execp->a_text = GET_WORD (abfd, bytes->e_text);
70 execp->a_data = GET_WORD (abfd, bytes->e_data);
71 execp->a_bss = GET_WORD (abfd, bytes->e_bss);
72 execp->a_syms = GET_WORD (abfd, bytes->e_syms);
73 execp->a_entry = GET_WORD (abfd, bytes->e_entry);
74 execp->a_trsize = GET_WORD (abfd, bytes->e_trsize);
75 execp->a_drsize = GET_WORD (abfd, bytes->e_drsize);
76 execp->a_tload = GET_WORD (abfd, bytes->e_tload);
77 execp->a_dload = GET_WORD (abfd, bytes->e_dload);
78 execp->a_talign = bytes->e_talign[0];
79 execp->a_dalign = bytes->e_dalign[0];
80 execp->a_balign = bytes->e_balign[0];
81 execp->a_relaxable = bytes->e_relaxable[0];
84 /* Swaps the information in an internal exec header structure into the
85 supplied buffer ready for writing to disk. */
87 PROTO(void, bout_swap_exec_header_out,
89 struct internal_exec *execp,
90 struct external_exec *raw_bytes));
92 bout_swap_exec_header_out (abfd, execp, raw_bytes)
94 struct internal_exec *execp;
95 struct external_exec *raw_bytes;
97 struct external_exec *bytes = (struct external_exec *)raw_bytes;
99 /* Now fill in fields in the raw data, from the fields in the exec struct. */
100 bfd_h_put_32 (abfd, execp->a_info , bytes->e_info);
101 PUT_WORD (abfd, execp->a_text , bytes->e_text);
102 PUT_WORD (abfd, execp->a_data , bytes->e_data);
103 PUT_WORD (abfd, execp->a_bss , bytes->e_bss);
104 PUT_WORD (abfd, execp->a_syms , bytes->e_syms);
105 PUT_WORD (abfd, execp->a_entry , bytes->e_entry);
106 PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize);
107 PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize);
108 PUT_WORD (abfd, execp->a_tload , bytes->e_tload);
109 PUT_WORD (abfd, execp->a_dload , bytes->e_dload);
110 bytes->e_talign[0] = execp->a_talign;
111 bytes->e_dalign[0] = execp->a_dalign;
112 bytes->e_balign[0] = execp->a_balign;
113 bytes->e_relaxable[0] = execp->a_relaxable;
117 static const bfd_target *
118 b_out_object_p (abfd)
121 struct internal_exec anexec;
122 struct external_exec exec_bytes;
124 if (bfd_read ((PTR) &exec_bytes, 1, EXEC_BYTES_SIZE, abfd)
125 != EXEC_BYTES_SIZE) {
126 if (bfd_get_error () != bfd_error_system_call)
127 bfd_set_error (bfd_error_wrong_format);
131 anexec.a_info = bfd_h_get_32 (abfd, exec_bytes.e_info);
133 if (N_BADMAG (anexec)) {
134 bfd_set_error (bfd_error_wrong_format);
138 bout_swap_exec_header_in (abfd, &exec_bytes, &anexec);
139 return aout_32_some_aout_object_p (abfd, &anexec, b_out_callback);
143 /* Finish up the opening of a b.out file for reading. Fill in all the
144 fields that are not handled by common code. */
146 static const bfd_target *
147 b_out_callback (abfd)
150 struct internal_exec *execp = exec_hdr (abfd);
151 unsigned long bss_start;
153 /* Architecture and machine type */
154 bfd_set_arch_mach(abfd,
155 bfd_arch_i960, /* B.out only used on i960 */
156 bfd_mach_i960_core /* Default */
159 /* The positions of the string table and symbol table. */
160 obj_str_filepos (abfd) = N_STROFF (*execp);
161 obj_sym_filepos (abfd) = N_SYMOFF (*execp);
163 /* The alignments of the sections */
164 obj_textsec (abfd)->alignment_power = execp->a_talign;
165 obj_datasec (abfd)->alignment_power = execp->a_dalign;
166 obj_bsssec (abfd)->alignment_power = execp->a_balign;
168 /* The starting addresses of the sections. */
169 obj_textsec (abfd)->vma = execp->a_tload;
170 obj_datasec (abfd)->vma = execp->a_dload;
172 /* And reload the sizes, since the aout module zaps them */
173 obj_textsec (abfd)->_raw_size = execp->a_text;
175 bss_start = execp->a_dload + execp->a_data; /* BSS = end of data section */
176 obj_bsssec (abfd)->vma = align_power (bss_start, execp->a_balign);
178 /* The file positions of the sections */
179 obj_textsec (abfd)->filepos = N_TXTOFF(*execp);
180 obj_datasec (abfd)->filepos = N_DATOFF(*execp);
182 /* The file positions of the relocation info */
183 obj_textsec (abfd)->rel_filepos = N_TROFF(*execp);
184 obj_datasec (abfd)->rel_filepos = N_DROFF(*execp);
186 adata(abfd).page_size = 1; /* Not applicable. */
187 adata(abfd).segment_size = 1; /* Not applicable. */
188 adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
190 if (execp->a_relaxable)
191 abfd->flags |= BFD_IS_RELAXABLE;
195 struct bout_data_struct {
197 struct internal_exec e;
201 b_out_mkobject (abfd)
204 struct bout_data_struct *rawptr;
206 rawptr = (struct bout_data_struct *) bfd_zalloc (abfd, sizeof (struct bout_data_struct));
210 abfd->tdata.bout_data = rawptr;
211 exec_hdr (abfd) = &rawptr->e;
213 obj_textsec (abfd) = (asection *)NULL;
214 obj_datasec (abfd) = (asection *)NULL;
215 obj_bsssec (abfd) = (asection *)NULL;
221 b_out_write_object_contents (abfd)
224 struct external_exec swapped_hdr;
226 if (! aout_32_make_sections (abfd))
229 exec_hdr (abfd)->a_info = BMAGIC;
231 exec_hdr (abfd)->a_text = obj_textsec (abfd)->_raw_size;
232 exec_hdr (abfd)->a_data = obj_datasec (abfd)->_raw_size;
233 exec_hdr (abfd)->a_bss = obj_bsssec (abfd)->_raw_size;
234 exec_hdr (abfd)->a_syms = bfd_get_symcount (abfd) * sizeof (struct nlist);
235 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
236 exec_hdr (abfd)->a_trsize = ((obj_textsec (abfd)->reloc_count) *
237 sizeof (struct relocation_info));
238 exec_hdr (abfd)->a_drsize = ((obj_datasec (abfd)->reloc_count) *
239 sizeof (struct relocation_info));
241 exec_hdr (abfd)->a_talign = obj_textsec (abfd)->alignment_power;
242 exec_hdr (abfd)->a_dalign = obj_datasec (abfd)->alignment_power;
243 exec_hdr (abfd)->a_balign = obj_bsssec (abfd)->alignment_power;
245 exec_hdr (abfd)->a_tload = obj_textsec (abfd)->vma;
246 exec_hdr (abfd)->a_dload = obj_datasec (abfd)->vma;
248 bout_swap_exec_header_out (abfd, exec_hdr (abfd), &swapped_hdr);
250 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
251 || (bfd_write ((PTR) &swapped_hdr, 1, EXEC_BYTES_SIZE, abfd)
255 /* Now write out reloc info, followed by syms and strings */
256 if (bfd_get_symcount (abfd) != 0)
258 if (bfd_seek (abfd, (file_ptr)(N_SYMOFF(*exec_hdr(abfd))), SEEK_SET)
262 if (! aout_32_write_syms (abfd))
265 if (bfd_seek (abfd, (file_ptr)(N_TROFF(*exec_hdr(abfd))), SEEK_SET) != 0)
268 if (!b_out_squirt_out_relocs (abfd, obj_textsec (abfd))) return false;
269 if (bfd_seek (abfd, (file_ptr)(N_DROFF(*exec_hdr(abfd))), SEEK_SET)
273 if (!b_out_squirt_out_relocs (abfd, obj_datasec (abfd))) return false;
278 /** Some reloc hackery */
280 #define CALLS 0x66003800 /* Template for 'calls' instruction */
281 #define BAL 0x0b000000 /* Template for 'bal' instruction */
282 #define BALX 0x85000000 /* Template for 'balx' instruction */
283 #define BAL_MASK 0x00ffffff
284 #define CALL 0x09000000
285 #define PCREL13_MASK 0x1fff
288 #define output_addr(sec) ((sec)->output_offset+(sec)->output_section->vma)
290 /* Magic to turn callx into calljx */
291 static bfd_reloc_status_type
292 calljx_callback (abfd, link_info, reloc_entry, src, dst, input_section)
294 struct bfd_link_info *link_info;
295 arelent *reloc_entry;
298 asection *input_section;
300 int word = bfd_get_32 (abfd, src);
301 asymbol *symbol_in = *(reloc_entry->sym_ptr_ptr);
302 aout_symbol_type *symbol = aout_symbol (symbol_in);
305 value = get_value (reloc_entry, link_info, input_section);
307 if (IS_CALLNAME (symbol->other))
309 aout_symbol_type *balsym = symbol+1;
310 int inst = bfd_get_32 (abfd, (bfd_byte *) src-4);
311 /* The next symbol should be an N_BALNAME */
312 BFD_ASSERT (IS_BALNAME (balsym->other));
315 bfd_put_32 (abfd, inst, (bfd_byte *) dst-4);
317 value = (symbol->symbol.value
318 + output_addr (symbol->symbol.section));
321 word += value + reloc_entry->addend;
323 bfd_put_32(abfd, word, dst);
328 /* Magic to turn call into callj */
329 static bfd_reloc_status_type
330 callj_callback (abfd, link_info, reloc_entry, data, srcidx, dstidx,
331 input_section, shrinking)
333 struct bfd_link_info *link_info;
334 arelent *reloc_entry;
338 asection *input_section;
341 int word = bfd_get_32 (abfd, (bfd_byte *) data + srcidx);
342 asymbol *symbol_in = *(reloc_entry->sym_ptr_ptr);
343 aout_symbol_type *symbol = aout_symbol (symbol_in);
346 value = get_value (reloc_entry, link_info, input_section);
348 if (IS_OTHER(symbol->other))
350 /* Call to a system procedure - replace code with system
352 word = CALLS | (symbol->other - 1);
354 else if (IS_CALLNAME(symbol->other))
356 aout_symbol_type *balsym = symbol+1;
358 /* The next symbol should be an N_BALNAME. */
359 BFD_ASSERT(IS_BALNAME(balsym->other));
361 /* We are calling a leaf, so replace the call instruction with a
364 + output_addr (balsym->symbol.section)
365 + balsym->symbol.value + reloc_entry->addend
367 - output_addr (input_section))
370 else if ((symbol->symbol.flags & BSF_SECTION_SYM) != 0)
372 /* A callj against a symbol in the same section is a fully
373 resolved relative call. We don't need to do anything here.
374 If the symbol is not in the same section, I'm not sure what
375 to do; fortunately, this case will probably never arise. */
376 BFD_ASSERT (! shrinking);
377 BFD_ASSERT (symbol->symbol.section == input_section);
381 word = CALL | (((word & BAL_MASK)
383 + reloc_entry->addend
384 - (shrinking ? dstidx : 0)
385 - output_addr (input_section))
388 bfd_put_32(abfd, word, (bfd_byte *) data + dstidx);
392 /* type rshift size bitsize pcrel bitpos absolute overflow check*/
395 #define ABS32CODE_SHRUNK 1
400 #define ABS32_MAYBE_RELAXABLE 1
401 #define ABS32_WAS_RELAXABLE 2
405 static reloc_howto_type howto_reloc_callj =
406 HOWTO(CALLJ, 0, 2, 24, true, 0, complain_overflow_signed, 0,"callj", true, 0x00ffffff, 0x00ffffff,false);
407 static reloc_howto_type howto_reloc_abs32 =
408 HOWTO(ABS32, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"abs32", true, 0xffffffff,0xffffffff,false);
409 static reloc_howto_type howto_reloc_pcrel24 =
410 HOWTO(PCREL24, 0, 2, 24, true, 0, complain_overflow_signed,0,"pcrel24", true, 0x00ffffff,0x00ffffff,false);
412 static reloc_howto_type howto_reloc_pcrel13 =
413 HOWTO(PCREL13, 0, 2, 13, true, 0, complain_overflow_signed,0,"pcrel13", true, 0x00001fff,0x00001fff,false);
416 static reloc_howto_type howto_reloc_abs32codeshrunk =
417 HOWTO(ABS32CODE_SHRUNK, 0, 2, 24, true, 0, complain_overflow_signed, 0,"callx->callj", true, 0x00ffffff, 0x00ffffff,false);
419 static reloc_howto_type howto_reloc_abs32code =
420 HOWTO(ABS32CODE, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"callx", true, 0xffffffff,0xffffffff,false);
422 static reloc_howto_type howto_align_table[] = {
423 HOWTO (ALIGNER, 0, 0x1, 0, false, 0, complain_overflow_dont, 0, "align16", false, 0, 0, false),
424 HOWTO (ALIGNER, 0, 0x3, 0, false, 0, complain_overflow_dont, 0, "align32", false, 0, 0, false),
425 HOWTO (ALIGNER, 0, 0x7, 0, false, 0, complain_overflow_dont, 0, "align64", false, 0, 0, false),
426 HOWTO (ALIGNER, 0, 0xf, 0, false, 0, complain_overflow_dont, 0, "align128", false, 0, 0, false),
429 static reloc_howto_type howto_done_align_table[] = {
430 HOWTO (ALIGNDONE, 0x1, 0x1, 0, false, 0, complain_overflow_dont, 0, "donealign16", false, 0, 0, false),
431 HOWTO (ALIGNDONE, 0x3, 0x3, 0, false, 0, complain_overflow_dont, 0, "donealign32", false, 0, 0, false),
432 HOWTO (ALIGNDONE, 0x7, 0x7, 0, false, 0, complain_overflow_dont, 0, "donealign64", false, 0, 0, false),
433 HOWTO (ALIGNDONE, 0xf, 0xf, 0, false, 0, complain_overflow_dont, 0, "donealign128", false, 0, 0, false),
436 static reloc_howto_type *
437 b_out_bfd_reloc_type_lookup (abfd, code)
439 bfd_reloc_code_real_type code;
445 case BFD_RELOC_I960_CALLJ:
446 return &howto_reloc_callj;
449 return &howto_reloc_abs32;
450 case BFD_RELOC_24_PCREL:
451 return &howto_reloc_pcrel24;
455 /* Allocate enough room for all the reloc entries, plus pointers to them all */
458 b_out_slurp_reloc_table (abfd, asect, symbols)
463 register struct relocation_info *rptr;
464 unsigned int counter ;
466 int extern_mask, pcrel_mask, callj_mask, length_shift;
469 bfd_vma prev_addr = 0;
472 struct relocation_info *relocs;
473 arelent *reloc_cache;
475 if (asect->relocation)
477 if (!aout_32_slurp_symbol_table (abfd))
480 if (asect == obj_datasec (abfd)) {
481 reloc_size = exec_hdr(abfd)->a_drsize;
485 if (asect == obj_textsec (abfd)) {
486 reloc_size = exec_hdr(abfd)->a_trsize;
490 if (asect == obj_bsssec (abfd)) {
495 bfd_set_error (bfd_error_invalid_operation);
499 if (bfd_seek (abfd, (file_ptr)(asect->rel_filepos), SEEK_SET) != 0)
501 count = reloc_size / sizeof (struct relocation_info);
503 relocs = (struct relocation_info *) bfd_malloc (reloc_size);
504 if (!relocs && reloc_size != 0)
506 reloc_cache = (arelent *) bfd_malloc ((count+1) * sizeof (arelent));
509 free ((char*)relocs);
513 if (bfd_read ((PTR) relocs, 1, reloc_size, abfd) != reloc_size) {
522 if (abfd->xvec->header_byteorder_big_p) {
523 /* big-endian bit field allocation order */
531 /* little-endian bit field allocation order */
540 for (rptr = relocs, cache_ptr = reloc_cache, counter = 0;
542 counter++, rptr++, cache_ptr++)
544 unsigned char *raw = (unsigned char *)rptr;
546 cache_ptr->address = bfd_h_get_32 (abfd, raw + 0);
547 cache_ptr->howto = 0;
548 if (abfd->xvec->header_byteorder_big_p)
550 symnum = (raw[4] << 16) | (raw[5] << 8) | raw[6];
554 symnum = (raw[6] << 16) | (raw[5] << 8) | raw[4];
557 if (raw[7] & extern_mask)
559 /* if this is set then the r_index is a index into the symbol table;
560 * if the bit is not set then r_index contains a section map.
561 * we either fill in the sym entry with a pointer to the symbol,
562 * or point to the correct section
564 cache_ptr->sym_ptr_ptr = symbols + symnum;
565 cache_ptr->addend = 0;
568 /* in a.out symbols are relative to the beginning of the
569 * file rather than sections ?
570 * (look in translate_from_native_sym_flags)
571 * the reloc entry addend has added to it the offset into the
572 * file of the data, so subtract the base to make the reloc
573 * section relative */
576 /* sign-extend symnum from 24 bits to whatever host uses */
581 cache_ptr->sym_ptr_ptr = (asymbol **)NULL;
586 cache_ptr->sym_ptr_ptr = obj_textsec(abfd)->symbol_ptr_ptr;
587 cache_ptr->addend = - obj_textsec(abfd)->vma;
591 cache_ptr->sym_ptr_ptr = obj_datasec(abfd)->symbol_ptr_ptr;
592 cache_ptr->addend = - obj_datasec(abfd)->vma;
596 cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr;
597 cache_ptr->addend = - obj_bsssec(abfd)->vma;
601 cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr;
602 cache_ptr->addend = 0;
604 case -2: /* .align */
605 if (raw[7] & pcrel_mask)
607 cache_ptr->howto = &howto_align_table[(raw[7] >> length_shift) & 3];
608 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
615 cache_ptr->addend = 0;
624 /* the i960 only has a few relocation types:
625 abs 32-bit and pcrel 24bit. except for callj's! */
626 if (cache_ptr->howto != 0)
628 else if (raw[7] & callj_mask)
630 cache_ptr->howto = &howto_reloc_callj;
632 else if ( raw[7] & pcrel_mask)
634 if (raw[7] & size_mask)
635 cache_ptr->howto = &howto_reloc_pcrel13;
637 cache_ptr->howto = &howto_reloc_pcrel24;
641 if (raw[7] & incode_mask)
643 cache_ptr->howto = &howto_reloc_abs32code;
647 cache_ptr->howto = &howto_reloc_abs32;
650 if (cache_ptr->address < prev_addr)
652 /* Ouch! this reloc is out of order, insert into the right place
655 arelent *cursor = cache_ptr-1;
656 bfd_vma stop = cache_ptr->address;
658 while (cursor->address > stop && cursor >= reloc_cache)
660 cursor[1] = cursor[0];
667 prev_addr = cache_ptr->address;
674 asect->relocation = reloc_cache;
675 asect->reloc_count = count;
683 b_out_squirt_out_relocs (abfd, section)
692 unsigned int count = section->reloc_count;
693 struct relocation_info *native, *natptr;
694 size_t natsize = count * sizeof (struct relocation_info);
695 int extern_mask, pcrel_mask, len_2, callj_mask;
696 if (count == 0) return true;
697 generic = section->orelocation;
698 native = ((struct relocation_info *) bfd_malloc (natsize));
699 if (!native && natsize != 0)
702 if (abfd->xvec->header_byteorder_big_p)
704 /* Big-endian bit field allocation order */
714 /* Little-endian bit field allocation order */
723 for (natptr = native; count > 0; --count, ++natptr, ++generic)
725 arelent *g = *generic;
726 unsigned char *raw = (unsigned char *)natptr;
727 asymbol *sym = *(g->sym_ptr_ptr);
729 asection *output_section = sym->section->output_section;
731 bfd_h_put_32(abfd, g->address, raw);
732 /* Find a type in the output format which matches the input howto -
733 * at the moment we assume input format == output format FIXME!!
736 /* FIXME: Need callj stuff here, and to check the howto entries to
737 be sure they are real for this architecture. */
738 if (g->howto== &howto_reloc_callj)
740 raw[7] = callj_mask + pcrel_mask + len_2;
742 else if (g->howto == &howto_reloc_pcrel24)
744 raw[7] = pcrel_mask + len_2;
746 else if (g->howto == &howto_reloc_pcrel13)
748 raw[7] = pcrel_mask + len_1;
750 else if (g->howto == &howto_reloc_abs32code)
752 raw[7] = len_2 + incode_mask;
754 else if (g->howto >= howto_align_table
755 && g->howto <= (howto_align_table
756 + sizeof (howto_align_table) / sizeof (howto_align_table[0])
759 /* symnum == -2; extern_mask not set, pcrel_mask set */
763 | ((g->howto - howto_align_table) << 1));
770 /* already mucked with r_extern, r_idx */;
771 else if (bfd_is_com_section (output_section)
772 || bfd_is_abs_section (output_section)
773 || bfd_is_und_section (output_section))
776 if (bfd_abs_section_ptr->symbol == sym)
778 /* Whoops, looked like an abs symbol, but is really an offset
779 from the abs section */
788 r_idx = stoi((*(g->sym_ptr_ptr))->flags);
793 /* Just an ordinary section */
795 r_idx = output_section->target_index;
798 if (abfd->xvec->header_byteorder_big_p) {
799 raw[4] = (unsigned char) (r_idx >> 16);
800 raw[5] = (unsigned char) (r_idx >> 8);
801 raw[6] = (unsigned char) (r_idx );
803 raw[6] = (unsigned char) (r_idx >> 16);
804 raw[5] = (unsigned char) (r_idx>> 8);
805 raw[4] = (unsigned char) (r_idx );
808 raw[7] |= extern_mask;
811 if (bfd_write ((PTR) native, 1, natsize, abfd) != natsize) {
820 /* This is stupid. This function should be a boolean predicate */
822 b_out_canonicalize_reloc (abfd, section, relptr, symbols)
831 if ((section->flags & SEC_CONSTRUCTOR) != 0)
833 arelent_chain *chain = section->constructor_chain;
834 for (count = 0; count < section->reloc_count; count++)
836 *relptr++ = &chain->relent;
842 if (section->relocation == NULL
843 && ! b_out_slurp_reloc_table (abfd, section, symbols))
846 tblptr = section->relocation;
847 for (count = 0; count++ < section->reloc_count;)
848 *relptr++ = tblptr++;
853 return section->reloc_count;
857 b_out_get_reloc_upper_bound (abfd, asect)
861 if (bfd_get_format (abfd) != bfd_object) {
862 bfd_set_error (bfd_error_invalid_operation);
866 if (asect->flags & SEC_CONSTRUCTOR)
867 return sizeof (arelent *) * (asect->reloc_count + 1);
869 if (asect == obj_datasec (abfd))
870 return (sizeof (arelent *) *
871 ((exec_hdr(abfd)->a_drsize / sizeof (struct relocation_info))
874 if (asect == obj_textsec (abfd))
875 return (sizeof (arelent *) *
876 ((exec_hdr(abfd)->a_trsize / sizeof (struct relocation_info))
879 if (asect == obj_bsssec (abfd))
882 bfd_set_error (bfd_error_invalid_operation);
887 b_out_set_section_contents (abfd, section, location, offset, count)
895 if (abfd->output_has_begun == false) { /* set by bfd.c handler */
896 if (! aout_32_make_sections (abfd))
899 obj_textsec (abfd)->filepos = sizeof(struct internal_exec);
900 obj_datasec(abfd)->filepos = obj_textsec(abfd)->filepos
901 + obj_textsec (abfd)->_raw_size;
904 /* regardless, once we know what we're doing, we might as well get going */
905 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0)
909 return (bfd_write ((PTR)location, 1, count, abfd) == count) ?true:false;
915 b_out_set_arch_mach (abfd, arch, machine)
917 enum bfd_architecture arch;
918 unsigned long machine;
920 bfd_default_set_arch_mach(abfd, arch, machine);
922 if (arch == bfd_arch_unknown) /* Unknown machine arch is OK */
924 if (arch == bfd_arch_i960) /* i960 default is OK */
926 case bfd_mach_i960_core:
927 case bfd_mach_i960_kb_sb:
928 case bfd_mach_i960_mc:
929 case bfd_mach_i960_xa:
930 case bfd_mach_i960_ca:
931 case bfd_mach_i960_ka_sa:
942 b_out_sizeof_headers (ignore_abfd, ignore)
946 return sizeof(struct internal_exec);
951 /************************************************************************/
953 get_value (reloc, link_info, input_section)
955 struct bfd_link_info *link_info;
956 asection *input_section;
959 asymbol *symbol = *(reloc->sym_ptr_ptr);
961 /* A symbol holds a pointer to a section, and an offset from the
962 base of the section. To relocate, we find where the section will
963 live in the output and add that in */
965 if (bfd_is_und_section (symbol->section))
967 struct bfd_link_hash_entry *h;
969 /* The symbol is undefined in this BFD. Look it up in the
970 global linker hash table. FIXME: This should be changed when
971 we convert b.out to use a specific final_link function and
972 change the interface to bfd_relax_section to not require the
974 h = bfd_link_hash_lookup (link_info->hash, bfd_asymbol_name (symbol),
976 if (h != (struct bfd_link_hash_entry *) NULL
977 && (h->type == bfd_link_hash_defined
978 || h->type == bfd_link_hash_defweak))
979 value = h->u.def.value + output_addr (h->u.def.section);
980 else if (h != (struct bfd_link_hash_entry *) NULL
981 && h->type == bfd_link_hash_common)
985 if (! ((*link_info->callbacks->undefined_symbol)
986 (link_info, bfd_asymbol_name (symbol),
987 input_section->owner, input_section, reloc->address)))
994 value = symbol->value + output_addr (symbol->section);
997 /* Add the value contained in the relocation */
998 value += reloc->addend;
1004 perform_slip (abfd, slip, input_section, value)
1007 asection *input_section;
1012 s = _bfd_generic_link_get_symbols (abfd);
1013 BFD_ASSERT (s != (asymbol **) NULL);
1015 /* Find all symbols past this point, and make them know
1020 if (p->section == input_section)
1022 /* This was pointing into this section, so mangle it */
1023 if (p->value > value)
1026 if (p->udata.p != NULL)
1028 struct generic_link_hash_entry *h;
1030 h = (struct generic_link_hash_entry *) p->udata.p;
1031 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
1032 h->root.u.def.value -= slip;
1033 BFD_ASSERT (h->root.u.def.value == p->value);
1042 /* This routine works out if the thing we want to get to can be
1043 reached with a 24bit offset instead of a 32 bit one.
1044 If it can, then it changes the amode */
1047 abs32code (abfd, input_section, r, shrink, link_info)
1049 asection *input_section;
1051 unsigned int shrink;
1052 struct bfd_link_info *link_info;
1054 bfd_vma value = get_value (r, link_info, input_section);
1055 bfd_vma dot = output_addr (input_section) + r->address;
1058 /* See if the address we're looking at within 2^23 bytes of where
1059 we are, if so then we can use a small branch rather than the
1060 jump we were going to */
1062 gap = value - (dot - shrink);
1065 if (-1<<23 < (long)gap && (long)gap < 1<<23 )
1067 /* Change the reloc type from 32bitcode possible 24, to 24bit
1070 r->howto = &howto_reloc_abs32codeshrunk;
1071 /* The place to relc moves back by four bytes */
1074 /* This will be four bytes smaller in the long run */
1076 perform_slip (abfd, 4, input_section, r->address-shrink + 4);
1082 aligncode (abfd, input_section, r, shrink)
1084 asection *input_section;
1086 unsigned int shrink;
1088 bfd_vma dot = output_addr (input_section) + r->address;
1093 int size = r->howto->size;
1095 /* Reduce the size of the alignment so that it's still aligned but
1096 smaller - the current size is already the same size as or bigger
1097 than the alignment required. */
1099 /* calculate the first byte following the padding before we optimize */
1100 old_end = ((dot + size ) & ~size) + size+1;
1101 /* work out where the new end will be - remember that we're smaller
1102 than we used to be */
1103 new_end = ((dot - shrink + size) & ~size);
1105 /* This is the new end */
1106 gap = old_end - ((dot + size) & ~size);
1108 shrink_delta = (old_end - new_end) - shrink;
1112 /* Change the reloc so that it knows how far to align to */
1113 r->howto = howto_done_align_table + (r->howto - howto_align_table);
1115 /* Encode the stuff into the addend - for future use we need to
1116 know how big the reloc used to be */
1117 r->addend = old_end - dot + r->address;
1119 /* This will be N bytes smaller in the long run, adjust all the symbols */
1120 perform_slip (abfd, shrink_delta, input_section, r->address - shrink);
1121 shrink += shrink_delta;
1127 b_out_bfd_relax_section (abfd, i, link_info, again)
1130 struct bfd_link_info *link_info;
1133 /* Get enough memory to hold the stuff */
1134 bfd *input_bfd = i->owner;
1135 asection *input_section = i;
1137 arelent **reloc_vector = NULL;
1138 long reloc_size = bfd_get_reloc_upper_bound(input_bfd,
1144 /* We only run this relaxation once. It might work to run it
1145 multiple times, but it hasn't been tested. */
1152 reloc_vector = (arelent **) bfd_malloc (reloc_size);
1153 if (reloc_vector == NULL && reloc_size != 0)
1156 /* Get the relocs and think about them */
1158 bfd_canonicalize_reloc (input_bfd, input_section, reloc_vector,
1159 _bfd_generic_link_get_symbols (input_bfd));
1160 if (reloc_count < 0)
1162 if (reloc_count > 0)
1165 for (parent = reloc_vector; *parent; parent++)
1167 arelent *r = *parent;
1168 switch (r->howto->type)
1171 /* An alignment reloc */
1172 shrink = aligncode (abfd, input_section, r, shrink);
1175 /* A 32bit reloc in an addressing mode */
1176 shrink = abs32code (input_bfd, input_section, r, shrink,
1179 case ABS32CODE_SHRUNK:
1186 input_section->_cooked_size = input_section->_raw_size - shrink;
1188 if (reloc_vector != NULL)
1189 free (reloc_vector);
1192 if (reloc_vector != NULL)
1193 free (reloc_vector);
1198 b_out_bfd_get_relocated_section_contents (in_abfd, link_info, link_order,
1199 data, relocateable, symbols)
1201 struct bfd_link_info *link_info;
1202 struct bfd_link_order *link_order;
1204 boolean relocateable;
1207 /* Get enough memory to hold the stuff */
1208 bfd *input_bfd = link_order->u.indirect.section->owner;
1209 asection *input_section = link_order->u.indirect.section;
1210 long reloc_size = bfd_get_reloc_upper_bound(input_bfd,
1212 arelent **reloc_vector = NULL;
1218 /* If producing relocateable output, don't bother to relax. */
1220 return bfd_generic_get_relocated_section_contents (in_abfd, link_info,
1225 reloc_vector = (arelent **) bfd_malloc (reloc_size);
1226 if (reloc_vector == NULL && reloc_size != 0)
1229 input_section->reloc_done = 1;
1231 /* read in the section */
1232 BFD_ASSERT (true == bfd_get_section_contents(input_bfd,
1236 input_section->_raw_size));
1238 reloc_count = bfd_canonicalize_reloc (input_bfd,
1242 if (reloc_count < 0)
1244 if (reloc_count > 0)
1246 arelent **parent = reloc_vector;
1249 unsigned int dst_address = 0;
1250 unsigned int src_address = 0;
1254 /* Find how long a run we can do */
1255 while (dst_address < link_order->size)
1260 /* Note that the relaxing didn't tie up the addresses in the
1261 relocation, so we use the original address to work out the
1262 run of non-relocated data */
1263 BFD_ASSERT (reloc->address >= src_address);
1264 run = reloc->address - src_address;
1269 run = link_order->size - dst_address;
1271 /* Copy the bytes */
1272 for (idx = 0; idx < run; idx++)
1274 data[dst_address++] = data[src_address++];
1277 /* Now do the relocation */
1281 switch (reloc->howto->type)
1284 calljx_callback (in_abfd, link_info, reloc,
1285 src_address + data, dst_address + data,
1292 (bfd_get_32 (in_abfd, data+src_address)
1293 + get_value (reloc, link_info, input_section)),
1299 callj_callback (in_abfd, link_info, reloc, data, src_address,
1300 dst_address, input_section, false);
1305 BFD_ASSERT (reloc->addend >= src_address);
1306 BFD_ASSERT (reloc->addend <= input_section->_raw_size);
1307 src_address = reloc->addend;
1308 dst_address = ((dst_address + reloc->howto->size)
1309 & ~reloc->howto->size);
1311 case ABS32CODE_SHRUNK:
1312 /* This used to be a callx, but we've found out that a
1313 callj will reach, so do the right thing. */
1314 callj_callback (in_abfd, link_info, reloc, data,
1315 src_address + 4, dst_address, input_section,
1322 long int word = bfd_get_32(in_abfd, data+src_address);
1325 value = get_value (reloc, link_info, input_section);
1326 word = ((word & ~BAL_MASK)
1327 | (((word & BAL_MASK)
1329 - output_addr (input_section)
1333 bfd_put_32(in_abfd,word, data+dst_address);
1342 long int word = bfd_get_32(in_abfd, data+src_address);
1345 value = get_value (reloc, link_info, input_section);
1346 word = ((word & ~PCREL13_MASK)
1347 | (((word & PCREL13_MASK)
1350 - output_addr (input_section))
1353 bfd_put_32(in_abfd,word, data+dst_address);
1366 if (reloc_vector != NULL)
1367 free (reloc_vector);
1370 if (reloc_vector != NULL)
1371 free (reloc_vector);
1374 /***********************************************************************/
1376 /* Build the transfer vectors for Big and Little-Endian B.OUT files. */
1378 #define aout_32_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
1379 #define aout_32_close_and_cleanup aout_32_bfd_free_cached_info
1381 #define b_out_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
1382 #define b_out_bfd_link_add_symbols _bfd_generic_link_add_symbols
1383 #define b_out_bfd_final_link _bfd_generic_final_link
1384 #define b_out_bfd_link_split_section _bfd_generic_link_split_section
1386 #define aout_32_get_section_contents_in_window \
1387 _bfd_generic_get_section_contents_in_window
1389 const bfd_target b_out_vec_big_host =
1391 "b.out.big", /* name */
1392 bfd_target_aout_flavour,
1393 false, /* data byte order is little */
1394 true, /* hdr byte order is big */
1395 (HAS_RELOC | EXEC_P | /* object flags */
1396 HAS_LINENO | HAS_DEBUG |
1397 HAS_SYMS | HAS_LOCALS | WP_TEXT | BFD_IS_RELAXABLE ),
1398 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
1399 '_', /* symbol leading char */
1400 ' ', /* ar_pad_char */
1401 16, /* ar_max_namelen */
1403 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
1404 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
1405 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
1406 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1407 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1408 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
1409 {_bfd_dummy_target, b_out_object_p, /* bfd_check_format */
1410 bfd_generic_archive_p, _bfd_dummy_target},
1411 {bfd_false, b_out_mkobject, /* bfd_set_format */
1412 _bfd_generic_mkarchive, bfd_false},
1413 {bfd_false, b_out_write_object_contents, /* bfd_write_contents */
1414 _bfd_write_archive_contents, bfd_false},
1416 BFD_JUMP_TABLE_GENERIC (aout_32),
1417 BFD_JUMP_TABLE_COPY (_bfd_generic),
1418 BFD_JUMP_TABLE_CORE (_bfd_nocore),
1419 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd),
1420 BFD_JUMP_TABLE_SYMBOLS (aout_32),
1421 BFD_JUMP_TABLE_RELOCS (b_out),
1422 BFD_JUMP_TABLE_WRITE (b_out),
1423 BFD_JUMP_TABLE_LINK (b_out),
1424 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
1430 const bfd_target b_out_vec_little_host =
1432 "b.out.little", /* name */
1433 bfd_target_aout_flavour,
1434 false, /* data byte order is little */
1435 false, /* header byte order is little */
1436 (HAS_RELOC | EXEC_P | /* object flags */
1437 HAS_LINENO | HAS_DEBUG |
1438 HAS_SYMS | HAS_LOCALS | WP_TEXT | BFD_IS_RELAXABLE ),
1439 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
1440 '_', /* symbol leading char */
1441 ' ', /* ar_pad_char */
1442 16, /* ar_max_namelen */
1443 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
1444 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
1445 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
1446 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
1447 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
1448 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
1450 {_bfd_dummy_target, b_out_object_p, /* bfd_check_format */
1451 bfd_generic_archive_p, _bfd_dummy_target},
1452 {bfd_false, b_out_mkobject, /* bfd_set_format */
1453 _bfd_generic_mkarchive, bfd_false},
1454 {bfd_false, b_out_write_object_contents, /* bfd_write_contents */
1455 _bfd_write_archive_contents, bfd_false},
1457 BFD_JUMP_TABLE_GENERIC (aout_32),
1458 BFD_JUMP_TABLE_COPY (_bfd_generic),
1459 BFD_JUMP_TABLE_CORE (_bfd_nocore),
1460 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd),
1461 BFD_JUMP_TABLE_SYMBOLS (aout_32),
1462 BFD_JUMP_TABLE_RELOCS (b_out),
1463 BFD_JUMP_TABLE_WRITE (b_out),
1464 BFD_JUMP_TABLE_LINK (b_out),
1465 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),