1 /* BFD back-end for Intel 960 b.out binaries.
2 Copyright 1990, 1991, 1992, 1993, 1994 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., 675 Mass Ave, Cambridge, MA 02139, 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 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 *));
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;
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. */
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));
207 if (rawptr == NULL) {
208 bfd_set_error (bfd_error_no_memory);
212 abfd->tdata.bout_data = rawptr;
213 exec_hdr (abfd) = &rawptr->e;
215 /* For simplicity's sake we just make all the sections right here. */
216 obj_textsec (abfd) = (asection *)NULL;
217 obj_datasec (abfd) = (asection *)NULL;
218 obj_bsssec (abfd) = (asection *)NULL;
220 bfd_make_section (abfd, ".text");
221 bfd_make_section (abfd, ".data");
222 bfd_make_section (abfd, ".bss");
228 b_out_write_object_contents (abfd)
231 struct external_exec swapped_hdr;
233 exec_hdr (abfd)->a_info = BMAGIC;
235 exec_hdr (abfd)->a_text = obj_textsec (abfd)->_raw_size;
236 exec_hdr (abfd)->a_data = obj_datasec (abfd)->_raw_size;
237 exec_hdr (abfd)->a_bss = obj_bsssec (abfd)->_raw_size;
238 exec_hdr (abfd)->a_syms = bfd_get_symcount (abfd) * sizeof (struct nlist);
239 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
240 exec_hdr (abfd)->a_trsize = ((obj_textsec (abfd)->reloc_count) *
241 sizeof (struct relocation_info));
242 exec_hdr (abfd)->a_drsize = ((obj_datasec (abfd)->reloc_count) *
243 sizeof (struct relocation_info));
245 exec_hdr (abfd)->a_talign = obj_textsec (abfd)->alignment_power;
246 exec_hdr (abfd)->a_dalign = obj_datasec (abfd)->alignment_power;
247 exec_hdr (abfd)->a_balign = obj_bsssec (abfd)->alignment_power;
249 exec_hdr (abfd)->a_tload = obj_textsec (abfd)->vma;
250 exec_hdr (abfd)->a_dload = obj_datasec (abfd)->vma;
252 bout_swap_exec_header_out (abfd, exec_hdr (abfd), &swapped_hdr);
254 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
255 || (bfd_write ((PTR) &swapped_hdr, 1, EXEC_BYTES_SIZE, abfd)
259 /* Now write out reloc info, followed by syms and strings */
260 if (bfd_get_symcount (abfd) != 0)
262 if (bfd_seek (abfd, (file_ptr)(N_SYMOFF(*exec_hdr(abfd))), SEEK_SET)
266 if (! aout_32_write_syms (abfd))
269 if (bfd_seek (abfd, (file_ptr)(N_TROFF(*exec_hdr(abfd))), SEEK_SET) != 0)
272 if (!b_out_squirt_out_relocs (abfd, obj_textsec (abfd))) return false;
273 if (bfd_seek (abfd, (file_ptr)(N_DROFF(*exec_hdr(abfd))), SEEK_SET)
277 if (!b_out_squirt_out_relocs (abfd, obj_datasec (abfd))) return false;
282 /** Some reloc hackery */
284 #define CALLS 0x66003800 /* Template for 'calls' instruction */
285 #define BAL 0x0b000000 /* Template for 'bal' instruction */
286 #define BALX 0x85000000 /* Template for 'balx' instruction */
287 #define BAL_MASK 0x00ffffff
288 #define CALL 0x09000000
289 #define PCREL13_MASK 0x1fff
292 #define output_addr(sec) ((sec)->output_offset+(sec)->output_section->vma)
294 /* Magic to turn callx into calljx */
295 static bfd_reloc_status_type
296 calljx_callback (abfd, link_info, reloc_entry, src, dst, input_section)
298 struct bfd_link_info *link_info;
299 arelent *reloc_entry;
302 asection *input_section;
304 int word = bfd_get_32 (abfd, src);
305 asymbol *symbol_in = *(reloc_entry->sym_ptr_ptr);
306 aout_symbol_type *symbol = aout_symbol (symbol_in);
309 value = get_value (reloc_entry, link_info, input_section);
311 if (IS_CALLNAME (symbol->other))
313 aout_symbol_type *balsym = symbol+1;
314 int inst = bfd_get_32 (abfd, (bfd_byte *) src-4);
315 /* The next symbol should be an N_BALNAME */
316 BFD_ASSERT (IS_BALNAME (balsym->other));
319 bfd_put_32 (abfd, inst, (bfd_byte *) dst-4);
321 value = (symbol->symbol.value
322 + output_addr (symbol->symbol.section));
325 word += value + reloc_entry->addend;
327 bfd_put_32(abfd, word, dst);
332 /* Magic to turn call into callj */
333 static bfd_reloc_status_type
334 callj_callback (abfd, link_info, reloc_entry, data, srcidx, dstidx,
337 struct bfd_link_info *link_info;
338 arelent *reloc_entry;
342 asection *input_section;
344 int word = bfd_get_32 (abfd, (bfd_byte *) data + srcidx);
345 asymbol *symbol_in = *(reloc_entry->sym_ptr_ptr);
346 aout_symbol_type *symbol = aout_symbol (symbol_in);
349 value = get_value (reloc_entry, link_info, input_section);
351 if (IS_OTHER(symbol->other))
353 /* Call to a system procedure - replace code with system
355 word = CALLS | (symbol->other - 1);
357 else if (IS_CALLNAME(symbol->other))
359 aout_symbol_type *balsym = symbol+1;
361 /* The next symbol should be an N_BALNAME. */
362 BFD_ASSERT(IS_BALNAME(balsym->other));
364 /* We are calling a leaf, so replace the call instruction with a
367 + output_addr (balsym->symbol.section)
368 + balsym->symbol.value + reloc_entry->addend
370 - output_addr (input_section))
375 word = CALL | (((word & BAL_MASK)
377 + reloc_entry->addend
379 - output_addr (input_section))
382 bfd_put_32(abfd, word, (bfd_byte *) data + dstidx);
386 /* type rshift size bitsize pcrel bitpos absolute overflow check*/
389 #define ABS32CODE_SHRUNK 1
394 #define ABS32_MAYBE_RELAXABLE 1
395 #define ABS32_WAS_RELAXABLE 2
399 static reloc_howto_type howto_reloc_callj =
400 HOWTO(CALLJ, 0, 2, 24, true, 0, complain_overflow_signed, 0,"callj", true, 0x00ffffff, 0x00ffffff,false);
401 static reloc_howto_type howto_reloc_abs32 =
402 HOWTO(ABS32, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"abs32", true, 0xffffffff,0xffffffff,false);
403 static reloc_howto_type howto_reloc_pcrel24 =
404 HOWTO(PCREL24, 0, 2, 24, true, 0, complain_overflow_signed,0,"pcrel24", true, 0x00ffffff,0x00ffffff,false);
406 static reloc_howto_type howto_reloc_pcrel13 =
407 HOWTO(PCREL13, 0, 2, 13, true, 0, complain_overflow_signed,0,"pcrel13", true, 0x00001fff,0x00001fff,false);
410 static reloc_howto_type howto_reloc_abs32codeshrunk =
411 HOWTO(ABS32CODE_SHRUNK, 0, 2, 24, true, 0, complain_overflow_signed, 0,"callx->callj", true, 0x00ffffff, 0x00ffffff,false);
413 static reloc_howto_type howto_reloc_abs32code =
414 HOWTO(ABS32CODE, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"callx", true, 0xffffffff,0xffffffff,false);
416 static reloc_howto_type howto_align_table[] = {
417 HOWTO (ALIGNER, 0, 0x1, 0, false, 0, complain_overflow_dont, 0, "align16", false, 0, 0, false),
418 HOWTO (ALIGNER, 0, 0x3, 0, false, 0, complain_overflow_dont, 0, "align32", false, 0, 0, false),
419 HOWTO (ALIGNER, 0, 0x7, 0, false, 0, complain_overflow_dont, 0, "align64", false, 0, 0, false),
420 HOWTO (ALIGNER, 0, 0xf, 0, false, 0, complain_overflow_dont, 0, "align128", false, 0, 0, false),
423 static reloc_howto_type howto_done_align_table[] = {
424 HOWTO (ALIGNDONE, 0x1, 0x1, 0, false, 0, complain_overflow_dont, 0, "donealign16", false, 0, 0, false),
425 HOWTO (ALIGNDONE, 0x3, 0x3, 0, false, 0, complain_overflow_dont, 0, "donealign32", false, 0, 0, false),
426 HOWTO (ALIGNDONE, 0x7, 0x7, 0, false, 0, complain_overflow_dont, 0, "donealign64", false, 0, 0, false),
427 HOWTO (ALIGNDONE, 0xf, 0xf, 0, false, 0, complain_overflow_dont, 0, "donealign128", false, 0, 0, false),
430 static const reloc_howto_type *
431 b_out_bfd_reloc_type_lookup (abfd, code)
433 bfd_reloc_code_real_type code;
439 case BFD_RELOC_I960_CALLJ:
440 return &howto_reloc_callj;
442 return &howto_reloc_abs32;
443 case BFD_RELOC_24_PCREL:
444 return &howto_reloc_pcrel24;
448 /* Allocate enough room for all the reloc entries, plus pointers to them all */
451 b_out_slurp_reloc_table (abfd, asect, symbols)
456 register struct relocation_info *rptr;
457 unsigned int counter ;
459 int extern_mask, pcrel_mask, callj_mask, length_shift;
462 bfd_vma prev_addr = 0;
465 struct relocation_info *relocs;
466 arelent *reloc_cache;
468 if (asect->relocation)
470 if (!aout_32_slurp_symbol_table (abfd))
473 if (asect == obj_datasec (abfd)) {
474 reloc_size = exec_hdr(abfd)->a_drsize;
478 if (asect == obj_textsec (abfd)) {
479 reloc_size = exec_hdr(abfd)->a_trsize;
483 bfd_set_error (bfd_error_invalid_operation);
487 if (bfd_seek (abfd, (file_ptr)(asect->rel_filepos), SEEK_SET) != 0)
489 count = reloc_size / sizeof (struct relocation_info);
491 relocs = (struct relocation_info *) malloc (reloc_size);
492 if (!relocs && reloc_size != 0) {
493 bfd_set_error (bfd_error_no_memory);
496 reloc_cache = (arelent *) malloc ((count+1) * sizeof (arelent));
498 free ((char*)relocs);
499 bfd_set_error (bfd_error_no_memory);
503 if (bfd_read ((PTR) relocs, 1, reloc_size, abfd) != reloc_size) {
511 if (abfd->xvec->header_byteorder_big_p) {
512 /* big-endian bit field allocation order */
520 /* little-endian bit field allocation order */
529 for (rptr = relocs, cache_ptr = reloc_cache, counter = 0;
531 counter++, rptr++, cache_ptr++)
533 unsigned char *raw = (unsigned char *)rptr;
535 cache_ptr->address = bfd_h_get_32 (abfd, raw + 0);
536 cache_ptr->howto = 0;
537 if (abfd->xvec->header_byteorder_big_p)
539 symnum = (raw[4] << 16) | (raw[5] << 8) | raw[6];
543 symnum = (raw[6] << 16) | (raw[5] << 8) | raw[4];
546 if (raw[7] & extern_mask)
548 /* if this is set then the r_index is a index into the symbol table;
549 * if the bit is not set then r_index contains a section map.
550 * we either fill in the sym entry with a pointer to the symbol,
551 * or point to the correct section
553 cache_ptr->sym_ptr_ptr = symbols + symnum;
554 cache_ptr->addend = 0;
557 /* in a.out symbols are relative to the beginning of the
558 * file rather than sections ?
559 * (look in translate_from_native_sym_flags)
560 * the reloc entry addend has added to it the offset into the
561 * file of the data, so subtract the base to make the reloc
562 * section relative */
565 /* sign-extend symnum from 24 bits to whatever host uses */
570 cache_ptr->sym_ptr_ptr = (asymbol **)NULL;
575 cache_ptr->sym_ptr_ptr = obj_textsec(abfd)->symbol_ptr_ptr;
576 cache_ptr->addend = - obj_textsec(abfd)->vma;
580 cache_ptr->sym_ptr_ptr = obj_datasec(abfd)->symbol_ptr_ptr;
581 cache_ptr->addend = - obj_datasec(abfd)->vma;
585 cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr;
586 cache_ptr->addend = - obj_bsssec(abfd)->vma;
590 cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr;
591 cache_ptr->addend = 0;
593 case -2: /* .align */
594 if (raw[7] & pcrel_mask)
596 cache_ptr->howto = &howto_align_table[(raw[7] >> length_shift) & 3];
597 cache_ptr->sym_ptr_ptr = &bfd_abs_symbol;
604 cache_ptr->addend = 0;
613 /* the i960 only has a few relocation types:
614 abs 32-bit and pcrel 24bit. except for callj's! */
615 if (cache_ptr->howto != 0)
617 else if (raw[7] & callj_mask)
619 cache_ptr->howto = &howto_reloc_callj;
621 else if ( raw[7] & pcrel_mask)
623 if (raw[7] & size_mask)
624 cache_ptr->howto = &howto_reloc_pcrel13;
626 cache_ptr->howto = &howto_reloc_pcrel24;
630 if (raw[7] & incode_mask)
632 cache_ptr->howto = &howto_reloc_abs32code;
636 cache_ptr->howto = &howto_reloc_abs32;
639 if (cache_ptr->address < prev_addr)
641 /* Ouch! this reloc is out of order, insert into the right place
644 arelent *cursor = cache_ptr-1;
645 bfd_vma stop = cache_ptr->address;
647 while (cursor->address > stop && cursor >= reloc_cache)
649 cursor[1] = cursor[0];
656 prev_addr = cache_ptr->address;
662 asect->relocation = reloc_cache;
663 asect->reloc_count = count;
671 b_out_squirt_out_relocs (abfd, section)
680 unsigned int count = section->reloc_count;
681 struct relocation_info *native, *natptr;
682 size_t natsize = count * sizeof (struct relocation_info);
683 int extern_mask, pcrel_mask, len_2, callj_mask;
684 if (count == 0) return true;
685 generic = section->orelocation;
686 native = ((struct relocation_info *) malloc (natsize));
687 if (!native && natsize != 0) {
688 bfd_set_error (bfd_error_no_memory);
692 if (abfd->xvec->header_byteorder_big_p)
694 /* Big-endian bit field allocation order */
704 /* Little-endian bit field allocation order */
713 for (natptr = native; count > 0; --count, ++natptr, ++generic)
715 arelent *g = *generic;
716 unsigned char *raw = (unsigned char *)natptr;
717 asymbol *sym = *(g->sym_ptr_ptr);
719 asection *output_section = sym->section->output_section;
721 bfd_h_put_32(abfd, g->address, raw);
722 /* Find a type in the output format which matches the input howto -
723 * at the moment we assume input format == output format FIXME!!
726 /* FIXME: Need callj stuff here, and to check the howto entries to
727 be sure they are real for this architecture. */
728 if (g->howto== &howto_reloc_callj)
730 raw[7] = callj_mask + pcrel_mask + len_2;
732 else if (g->howto == &howto_reloc_pcrel24)
734 raw[7] = pcrel_mask + len_2;
736 else if (g->howto == &howto_reloc_pcrel13)
738 raw[7] = pcrel_mask + len_1;
740 else if (g->howto == &howto_reloc_abs32code)
742 raw[7] = len_2 + incode_mask;
744 else if (g->howto >= howto_align_table
745 && g->howto <= (howto_align_table
746 + sizeof (howto_align_table) / sizeof (howto_align_table[0])
749 /* symnum == -2; extern_mask not set, pcrel_mask set */
753 | ((g->howto - howto_align_table) << 1));
760 /* already mucked with r_extern, r_idx */;
761 else if (bfd_is_com_section (output_section)
762 || output_section == &bfd_abs_section
763 || output_section == &bfd_und_section)
766 if (bfd_abs_section.symbol == sym)
768 /* Whoops, looked like an abs symbol, but is really an offset
769 from the abs section */
778 r_idx = stoi((*(g->sym_ptr_ptr))->flags);
783 /* Just an ordinary section */
785 r_idx = output_section->target_index;
788 if (abfd->xvec->header_byteorder_big_p) {
789 raw[4] = (unsigned char) (r_idx >> 16);
790 raw[5] = (unsigned char) (r_idx >> 8);
791 raw[6] = (unsigned char) (r_idx );
793 raw[6] = (unsigned char) (r_idx >> 16);
794 raw[5] = (unsigned char) (r_idx>> 8);
795 raw[4] = (unsigned char) (r_idx );
798 raw[7] |= extern_mask;
801 if (bfd_write ((PTR) native, 1, natsize, abfd) != natsize) {
810 /* This is stupid. This function should be a boolean predicate */
812 b_out_canonicalize_reloc (abfd, section, relptr, symbols)
818 arelent *tblptr = section->relocation;
819 unsigned int count = 0;
821 if (!(tblptr || b_out_slurp_reloc_table (abfd, section, symbols)))
823 tblptr = section->relocation;
825 for (; count++ < section->reloc_count;)
826 *relptr++ = tblptr++;
830 return section->reloc_count;
834 b_out_get_reloc_upper_bound (abfd, asect)
838 if (bfd_get_format (abfd) != bfd_object) {
839 bfd_set_error (bfd_error_invalid_operation);
843 if (asect == obj_datasec (abfd))
844 return (sizeof (arelent *) *
845 ((exec_hdr(abfd)->a_drsize / sizeof (struct relocation_info))
848 if (asect == obj_textsec (abfd))
849 return (sizeof (arelent *) *
850 ((exec_hdr(abfd)->a_trsize / sizeof (struct relocation_info))
853 if (asect == obj_bsssec (abfd))
856 bfd_set_error (bfd_error_invalid_operation);
861 b_out_set_section_contents (abfd, section, location, offset, count)
864 unsigned char *location;
869 if (abfd->output_has_begun == false) { /* set by bfd.c handler */
870 if ((obj_textsec (abfd) == NULL) || (obj_datasec (abfd) == NULL) /*||
871 (obj_textsec (abfd)->_cooked_size == 0) || (obj_datasec (abfd)->_cooked_size == 0)*/) {
872 bfd_set_error (bfd_error_invalid_operation);
876 obj_textsec (abfd)->filepos = sizeof(struct internal_exec);
877 obj_datasec(abfd)->filepos = obj_textsec(abfd)->filepos
878 + obj_textsec (abfd)->_raw_size;
881 /* regardless, once we know what we're doing, we might as well get going */
882 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0)
886 return (bfd_write ((PTR)location, 1, count, abfd) == count) ?true:false;
892 b_out_set_arch_mach (abfd, arch, machine)
894 enum bfd_architecture arch;
895 unsigned long machine;
897 bfd_default_set_arch_mach(abfd, arch, machine);
899 if (arch == bfd_arch_unknown) /* Unknown machine arch is OK */
901 if (arch == bfd_arch_i960) /* i960 default is OK */
903 case bfd_mach_i960_core:
904 case bfd_mach_i960_kb_sb:
905 case bfd_mach_i960_mc:
906 case bfd_mach_i960_xa:
907 case bfd_mach_i960_ca:
908 case bfd_mach_i960_ka_sa:
919 b_out_sizeof_headers (ignore_abfd, ignore)
923 return sizeof(struct internal_exec);
928 /************************************************************************/
930 get_value (reloc, link_info, input_section)
932 struct bfd_link_info *link_info;
933 asection *input_section;
936 asymbol *symbol = *(reloc->sym_ptr_ptr);
938 /* A symbol holds a pointer to a section, and an offset from the
939 base of the section. To relocate, we find where the section will
940 live in the output and add that in */
942 if (symbol->section == &bfd_und_section)
944 struct bfd_link_hash_entry *h;
946 /* The symbol is undefined in this BFD. Look it up in the
947 global linker hash table. FIXME: This should be changed when
948 we convert b.out to use a specific final_link function and
949 change the interface to bfd_relax_section to not require the
951 h = bfd_link_hash_lookup (link_info->hash, bfd_asymbol_name (symbol),
953 if (h != (struct bfd_link_hash_entry *) NULL
954 && h->type == bfd_link_hash_defined)
955 value = h->u.def.value + output_addr (h->u.def.section);
956 else if (h != (struct bfd_link_hash_entry *) NULL
957 && h->type == bfd_link_hash_common)
961 if (! ((*link_info->callbacks->undefined_symbol)
962 (link_info, bfd_asymbol_name (symbol),
963 input_section->owner, input_section, reloc->address)))
970 value = symbol->value + output_addr (symbol->section);
973 /* Add the value contained in the relocation */
974 value += reloc->addend;
980 perform_slip (abfd, slip, input_section, value)
983 asection *input_section;
988 s = _bfd_generic_link_get_symbols (abfd);
989 BFD_ASSERT (s != (asymbol **) NULL);
991 /* Find all symbols past this point, and make them know
996 if (p->section == input_section)
998 /* This was pointing into this section, so mangle it */
999 if (p->value > value)
1002 if (p->udata != NULL)
1004 struct generic_link_hash_entry *h;
1006 h = (struct generic_link_hash_entry *) p->udata;
1007 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
1008 h->root.u.def.value -= slip;
1009 BFD_ASSERT (h->root.u.def.value == p->value);
1018 /* This routine works out if the thing we want to get to can be
1019 reached with a 24bit offset instead of a 32 bit one.
1020 If it can, then it changes the amode */
1023 abs32code (abfd, input_section, r, shrink, link_info)
1025 asection *input_section;
1027 unsigned int shrink;
1028 struct bfd_link_info *link_info;
1030 bfd_vma value = get_value (r, link_info, input_section);
1031 bfd_vma dot = output_addr (input_section) + r->address;
1034 /* See if the address we're looking at within 2^23 bytes of where
1035 we are, if so then we can use a small branch rather than the
1036 jump we were going to */
1038 gap = value - (dot - shrink);
1041 if (-1<<23 < (long)gap && (long)gap < 1<<23 )
1043 /* Change the reloc type from 32bitcode possible 24, to 24bit
1046 r->howto = &howto_reloc_abs32codeshrunk;
1047 /* The place to relc moves back by four bytes */
1050 /* This will be four bytes smaller in the long run */
1052 perform_slip (abfd, 4, input_section, r->address-shrink + 4);
1058 aligncode (abfd, input_section, r, shrink)
1060 asection *input_section;
1062 unsigned int shrink;
1064 bfd_vma dot = output_addr (input_section) + r->address;
1069 int size = r->howto->size;
1071 /* Reduce the size of the alignment so that it's still aligned but
1072 smaller - the current size is already the same size as or bigger
1073 than the alignment required. */
1075 /* calculate the first byte following the padding before we optimize */
1076 old_end = ((dot + size ) & ~size) + size+1;
1077 /* work out where the new end will be - remember that we're smaller
1078 than we used to be */
1079 new_end = ((dot - shrink + size) & ~size);
1081 /* This is the new end */
1082 gap = old_end - ((dot + size) & ~size);
1084 shrink_delta = (old_end - new_end) - shrink;
1088 /* Change the reloc so that it knows how far to align to */
1089 r->howto = howto_done_align_table + (r->howto - howto_align_table);
1091 /* Encode the stuff into the addend - for future use we need to
1092 know how big the reloc used to be */
1093 r->addend = old_end - dot + r->address;
1095 /* This will be N bytes smaller in the long run, adjust all the symbols */
1096 perform_slip (abfd, shrink_delta, input_section, r->address - shrink);
1097 shrink += shrink_delta;
1103 b_out_bfd_relax_section (abfd, i, link_info, again)
1106 struct bfd_link_info *link_info;
1109 /* Get enough memory to hold the stuff */
1110 bfd *input_bfd = i->owner;
1111 asection *input_section = i;
1113 arelent **reloc_vector = NULL;
1114 long reloc_size = bfd_get_reloc_upper_bound(input_bfd,
1120 /* We only run this relaxation once. It might work to run it
1121 multiple times, but it hasn't been tested. */
1128 reloc_vector = (arelent **) malloc (reloc_size);
1129 if (reloc_vector == NULL && reloc_size != 0)
1131 bfd_set_error (bfd_error_no_memory);
1135 /* Get the relocs and think about them */
1137 bfd_canonicalize_reloc (input_bfd, input_section, reloc_vector,
1138 _bfd_generic_link_get_symbols (input_bfd));
1139 if (reloc_count < 0)
1141 if (reloc_count > 0)
1144 for (parent = reloc_vector; *parent; parent++)
1146 arelent *r = *parent;
1147 switch (r->howto->type)
1150 /* An alignment reloc */
1151 shrink = aligncode (abfd, input_section, r, shrink);
1154 /* A 32bit reloc in an addressing mode */
1155 shrink = abs32code (input_bfd, input_section, r, shrink,
1158 case ABS32CODE_SHRUNK:
1165 input_section->_cooked_size = input_section->_raw_size - shrink;
1167 if (reloc_vector != NULL)
1168 free (reloc_vector);
1171 if (reloc_vector != NULL)
1172 free (reloc_vector);
1177 b_out_bfd_get_relocated_section_contents (in_abfd, link_info, link_order,
1178 data, relocateable, symbols)
1180 struct bfd_link_info *link_info;
1181 struct bfd_link_order *link_order;
1183 boolean relocateable;
1186 /* Get enough memory to hold the stuff */
1187 bfd *input_bfd = link_order->u.indirect.section->owner;
1188 asection *input_section = link_order->u.indirect.section;
1189 long reloc_size = bfd_get_reloc_upper_bound(input_bfd,
1191 arelent **reloc_vector = NULL;
1197 /* If producing relocateable output, don't bother to relax. */
1199 return bfd_generic_get_relocated_section_contents (in_abfd, link_info,
1204 reloc_vector = (arelent **) malloc (reloc_size);
1205 if (reloc_vector == NULL && reloc_size != 0)
1207 bfd_set_error (bfd_error_no_memory);
1211 input_section->reloc_done = 1;
1213 /* read in the section */
1214 BFD_ASSERT (true == bfd_get_section_contents(input_bfd,
1218 input_section->_raw_size));
1220 reloc_count = bfd_canonicalize_reloc (input_bfd,
1224 if (reloc_count < 0)
1226 if (reloc_count > 0)
1228 arelent **parent = reloc_vector;
1231 unsigned int dst_address = 0;
1232 unsigned int src_address = 0;
1236 /* Find how long a run we can do */
1237 while (dst_address < link_order->size)
1242 /* Note that the relaxing didn't tie up the addresses in the
1243 relocation, so we use the original address to work out the
1244 run of non-relocated data */
1245 BFD_ASSERT (reloc->address >= src_address);
1246 run = reloc->address - src_address;
1251 run = link_order->size - dst_address;
1253 /* Copy the bytes */
1254 for (idx = 0; idx < run; idx++)
1256 data[dst_address++] = data[src_address++];
1259 /* Now do the relocation */
1263 switch (reloc->howto->type)
1266 calljx_callback (in_abfd, link_info, reloc,
1267 src_address + data, dst_address + data,
1274 (bfd_get_32 (in_abfd, data+src_address)
1275 + get_value (reloc, link_info, input_section)),
1281 callj_callback (in_abfd, link_info, reloc, data, src_address,
1282 dst_address, input_section);
1287 BFD_ASSERT (reloc->addend >= src_address);
1288 BFD_ASSERT (reloc->addend <= input_section->_raw_size);
1289 src_address = reloc->addend;
1290 dst_address = ((dst_address + reloc->howto->size)
1291 & ~reloc->howto->size);
1293 case ABS32CODE_SHRUNK:
1294 /* This used to be a callx, but we've found out that a
1295 callj will reach, so do the right thing. */
1296 callj_callback (in_abfd, link_info, reloc, data,
1297 src_address + 4, dst_address, input_section);
1303 long int word = bfd_get_32(in_abfd, data+src_address);
1306 value = get_value (reloc, link_info, input_section);
1307 word = ((word & ~BAL_MASK)
1308 | (((word & BAL_MASK)
1310 - output_addr (input_section)
1314 bfd_put_32(in_abfd,word, data+dst_address);
1323 long int word = bfd_get_32(in_abfd, data+src_address);
1326 value = get_value (reloc, link_info, input_section);
1327 word = ((word & ~PCREL13_MASK)
1328 | (((word & PCREL13_MASK)
1331 - output_addr (input_section))
1334 bfd_put_32(in_abfd,word, data+dst_address);
1347 if (reloc_vector != NULL)
1348 free (reloc_vector);
1351 if (reloc_vector != NULL)
1352 free (reloc_vector);
1355 /***********************************************************************/
1357 /* Build the transfer vectors for Big and Little-Endian B.OUT files. */
1359 #define aout_32_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
1360 #define aout_32_close_and_cleanup aout_32_bfd_free_cached_info
1362 #define b_out_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
1363 #define b_out_bfd_link_add_symbols _bfd_generic_link_add_symbols
1364 #define b_out_bfd_final_link _bfd_generic_final_link
1366 bfd_target b_out_vec_big_host =
1368 "b.out.big", /* name */
1369 bfd_target_aout_flavour,
1370 false, /* data byte order is little */
1371 true, /* hdr byte order is big */
1372 (HAS_RELOC | EXEC_P | /* object flags */
1373 HAS_LINENO | HAS_DEBUG |
1374 HAS_SYMS | HAS_LOCALS | WP_TEXT | BFD_IS_RELAXABLE ),
1375 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
1376 '_', /* symbol leading char */
1377 ' ', /* ar_pad_char */
1378 16, /* ar_max_namelen */
1379 2, /* minumum alignment power */
1381 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
1382 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
1383 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
1384 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1385 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1386 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
1387 {_bfd_dummy_target, b_out_object_p, /* bfd_check_format */
1388 bfd_generic_archive_p, _bfd_dummy_target},
1389 {bfd_false, b_out_mkobject, /* bfd_set_format */
1390 _bfd_generic_mkarchive, bfd_false},
1391 {bfd_false, b_out_write_object_contents, /* bfd_write_contents */
1392 _bfd_write_archive_contents, bfd_false},
1394 BFD_JUMP_TABLE_GENERIC (aout_32),
1395 BFD_JUMP_TABLE_COPY (_bfd_generic),
1396 BFD_JUMP_TABLE_CORE (_bfd_nocore),
1397 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd),
1398 BFD_JUMP_TABLE_SYMBOLS (aout_32),
1399 BFD_JUMP_TABLE_RELOCS (b_out),
1400 BFD_JUMP_TABLE_WRITE (b_out),
1401 BFD_JUMP_TABLE_LINK (b_out),
1402 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
1408 bfd_target b_out_vec_little_host =
1410 "b.out.little", /* name */
1411 bfd_target_aout_flavour,
1412 false, /* data byte order is little */
1413 false, /* header byte order is little */
1414 (HAS_RELOC | EXEC_P | /* object flags */
1415 HAS_LINENO | HAS_DEBUG |
1416 HAS_SYMS | HAS_LOCALS | WP_TEXT | BFD_IS_RELAXABLE ),
1417 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
1418 '_', /* symbol leading char */
1419 ' ', /* ar_pad_char */
1420 16, /* ar_max_namelen */
1421 2, /* minum align */
1422 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
1423 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
1424 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
1425 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
1426 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
1427 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
1429 {_bfd_dummy_target, b_out_object_p, /* bfd_check_format */
1430 bfd_generic_archive_p, _bfd_dummy_target},
1431 {bfd_false, b_out_mkobject, /* bfd_set_format */
1432 _bfd_generic_mkarchive, bfd_false},
1433 {bfd_false, b_out_write_object_contents, /* bfd_write_contents */
1434 _bfd_write_archive_contents, bfd_false},
1436 BFD_JUMP_TABLE_GENERIC (aout_32),
1437 BFD_JUMP_TABLE_COPY (_bfd_generic),
1438 BFD_JUMP_TABLE_CORE (_bfd_nocore),
1439 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd),
1440 BFD_JUMP_TABLE_SYMBOLS (aout_32),
1441 BFD_JUMP_TABLE_RELOCS (b_out),
1442 BFD_JUMP_TABLE_WRITE (b_out),
1443 BFD_JUMP_TABLE_LINK (b_out),
1444 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),