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));
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 obj_textsec (abfd) = (asection *)NULL;
216 obj_datasec (abfd) = (asection *)NULL;
217 obj_bsssec (abfd) = (asection *)NULL;
223 b_out_write_object_contents (abfd)
226 struct external_exec swapped_hdr;
228 if (! aout_32_make_sections (abfd))
231 exec_hdr (abfd)->a_info = BMAGIC;
233 exec_hdr (abfd)->a_text = obj_textsec (abfd)->_raw_size;
234 exec_hdr (abfd)->a_data = obj_datasec (abfd)->_raw_size;
235 exec_hdr (abfd)->a_bss = obj_bsssec (abfd)->_raw_size;
236 exec_hdr (abfd)->a_syms = bfd_get_symcount (abfd) * sizeof (struct nlist);
237 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
238 exec_hdr (abfd)->a_trsize = ((obj_textsec (abfd)->reloc_count) *
239 sizeof (struct relocation_info));
240 exec_hdr (abfd)->a_drsize = ((obj_datasec (abfd)->reloc_count) *
241 sizeof (struct relocation_info));
243 exec_hdr (abfd)->a_talign = obj_textsec (abfd)->alignment_power;
244 exec_hdr (abfd)->a_dalign = obj_datasec (abfd)->alignment_power;
245 exec_hdr (abfd)->a_balign = obj_bsssec (abfd)->alignment_power;
247 exec_hdr (abfd)->a_tload = obj_textsec (abfd)->vma;
248 exec_hdr (abfd)->a_dload = obj_datasec (abfd)->vma;
250 bout_swap_exec_header_out (abfd, exec_hdr (abfd), &swapped_hdr);
252 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0
253 || (bfd_write ((PTR) &swapped_hdr, 1, EXEC_BYTES_SIZE, abfd)
257 /* Now write out reloc info, followed by syms and strings */
258 if (bfd_get_symcount (abfd) != 0)
260 if (bfd_seek (abfd, (file_ptr)(N_SYMOFF(*exec_hdr(abfd))), SEEK_SET)
264 if (! aout_32_write_syms (abfd))
267 if (bfd_seek (abfd, (file_ptr)(N_TROFF(*exec_hdr(abfd))), SEEK_SET) != 0)
270 if (!b_out_squirt_out_relocs (abfd, obj_textsec (abfd))) return false;
271 if (bfd_seek (abfd, (file_ptr)(N_DROFF(*exec_hdr(abfd))), SEEK_SET)
275 if (!b_out_squirt_out_relocs (abfd, obj_datasec (abfd))) return false;
280 /** Some reloc hackery */
282 #define CALLS 0x66003800 /* Template for 'calls' instruction */
283 #define BAL 0x0b000000 /* Template for 'bal' instruction */
284 #define BALX 0x85000000 /* Template for 'balx' instruction */
285 #define BAL_MASK 0x00ffffff
286 #define CALL 0x09000000
287 #define PCREL13_MASK 0x1fff
290 #define output_addr(sec) ((sec)->output_offset+(sec)->output_section->vma)
292 /* Magic to turn callx into calljx */
293 static bfd_reloc_status_type
294 calljx_callback (abfd, link_info, reloc_entry, src, dst, input_section)
296 struct bfd_link_info *link_info;
297 arelent *reloc_entry;
300 asection *input_section;
302 int word = bfd_get_32 (abfd, src);
303 asymbol *symbol_in = *(reloc_entry->sym_ptr_ptr);
304 aout_symbol_type *symbol = aout_symbol (symbol_in);
307 value = get_value (reloc_entry, link_info, input_section);
309 if (IS_CALLNAME (symbol->other))
311 aout_symbol_type *balsym = symbol+1;
312 int inst = bfd_get_32 (abfd, (bfd_byte *) src-4);
313 /* The next symbol should be an N_BALNAME */
314 BFD_ASSERT (IS_BALNAME (balsym->other));
317 bfd_put_32 (abfd, inst, (bfd_byte *) dst-4);
319 value = (symbol->symbol.value
320 + output_addr (symbol->symbol.section));
323 word += value + reloc_entry->addend;
325 bfd_put_32(abfd, word, dst);
330 /* Magic to turn call into callj */
331 static bfd_reloc_status_type
332 callj_callback (abfd, link_info, reloc_entry, data, srcidx, dstidx,
333 input_section, shrinking)
335 struct bfd_link_info *link_info;
336 arelent *reloc_entry;
340 asection *input_section;
343 int word = bfd_get_32 (abfd, (bfd_byte *) data + srcidx);
344 asymbol *symbol_in = *(reloc_entry->sym_ptr_ptr);
345 aout_symbol_type *symbol = aout_symbol (symbol_in);
348 value = get_value (reloc_entry, link_info, input_section);
350 if (IS_OTHER(symbol->other))
352 /* Call to a system procedure - replace code with system
354 word = CALLS | (symbol->other - 1);
356 else if (IS_CALLNAME(symbol->other))
358 aout_symbol_type *balsym = symbol+1;
360 /* The next symbol should be an N_BALNAME. */
361 BFD_ASSERT(IS_BALNAME(balsym->other));
363 /* We are calling a leaf, so replace the call instruction with a
366 + output_addr (balsym->symbol.section)
367 + balsym->symbol.value + reloc_entry->addend
369 - output_addr (input_section))
372 else if ((symbol->symbol.flags & BSF_SECTION_SYM) != 0)
374 /* A callj against a symbol in the same section is a fully
375 resolved relative call. We don't need to do anything here.
376 If the symbol is not in the same section, I'm not sure what
377 to do; fortunately, this case will probably never arise. */
378 BFD_ASSERT (! shrinking);
379 BFD_ASSERT (symbol->symbol.section == input_section);
383 word = CALL | (((word & BAL_MASK)
385 + reloc_entry->addend
386 - (shrinking ? dstidx : 0)
387 - output_addr (input_section))
390 bfd_put_32(abfd, word, (bfd_byte *) data + dstidx);
394 /* type rshift size bitsize pcrel bitpos absolute overflow check*/
397 #define ABS32CODE_SHRUNK 1
402 #define ABS32_MAYBE_RELAXABLE 1
403 #define ABS32_WAS_RELAXABLE 2
407 static reloc_howto_type howto_reloc_callj =
408 HOWTO(CALLJ, 0, 2, 24, true, 0, complain_overflow_signed, 0,"callj", true, 0x00ffffff, 0x00ffffff,false);
409 static reloc_howto_type howto_reloc_abs32 =
410 HOWTO(ABS32, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"abs32", true, 0xffffffff,0xffffffff,false);
411 static reloc_howto_type howto_reloc_pcrel24 =
412 HOWTO(PCREL24, 0, 2, 24, true, 0, complain_overflow_signed,0,"pcrel24", true, 0x00ffffff,0x00ffffff,false);
414 static reloc_howto_type howto_reloc_pcrel13 =
415 HOWTO(PCREL13, 0, 2, 13, true, 0, complain_overflow_signed,0,"pcrel13", true, 0x00001fff,0x00001fff,false);
418 static reloc_howto_type howto_reloc_abs32codeshrunk =
419 HOWTO(ABS32CODE_SHRUNK, 0, 2, 24, true, 0, complain_overflow_signed, 0,"callx->callj", true, 0x00ffffff, 0x00ffffff,false);
421 static reloc_howto_type howto_reloc_abs32code =
422 HOWTO(ABS32CODE, 0, 2, 32, false, 0, complain_overflow_bitfield,0,"callx", true, 0xffffffff,0xffffffff,false);
424 static reloc_howto_type howto_align_table[] = {
425 HOWTO (ALIGNER, 0, 0x1, 0, false, 0, complain_overflow_dont, 0, "align16", false, 0, 0, false),
426 HOWTO (ALIGNER, 0, 0x3, 0, false, 0, complain_overflow_dont, 0, "align32", false, 0, 0, false),
427 HOWTO (ALIGNER, 0, 0x7, 0, false, 0, complain_overflow_dont, 0, "align64", false, 0, 0, false),
428 HOWTO (ALIGNER, 0, 0xf, 0, false, 0, complain_overflow_dont, 0, "align128", false, 0, 0, false),
431 static reloc_howto_type howto_done_align_table[] = {
432 HOWTO (ALIGNDONE, 0x1, 0x1, 0, false, 0, complain_overflow_dont, 0, "donealign16", false, 0, 0, false),
433 HOWTO (ALIGNDONE, 0x3, 0x3, 0, false, 0, complain_overflow_dont, 0, "donealign32", false, 0, 0, false),
434 HOWTO (ALIGNDONE, 0x7, 0x7, 0, false, 0, complain_overflow_dont, 0, "donealign64", false, 0, 0, false),
435 HOWTO (ALIGNDONE, 0xf, 0xf, 0, false, 0, complain_overflow_dont, 0, "donealign128", false, 0, 0, false),
438 static reloc_howto_type *
439 b_out_bfd_reloc_type_lookup (abfd, code)
441 bfd_reloc_code_real_type code;
447 case BFD_RELOC_I960_CALLJ:
448 return &howto_reloc_callj;
451 return &howto_reloc_abs32;
452 case BFD_RELOC_24_PCREL:
453 return &howto_reloc_pcrel24;
457 /* Allocate enough room for all the reloc entries, plus pointers to them all */
460 b_out_slurp_reloc_table (abfd, asect, symbols)
465 register struct relocation_info *rptr;
466 unsigned int counter ;
468 int extern_mask, pcrel_mask, callj_mask, length_shift;
471 bfd_vma prev_addr = 0;
474 struct relocation_info *relocs;
475 arelent *reloc_cache;
477 if (asect->relocation)
479 if (!aout_32_slurp_symbol_table (abfd))
482 if (asect == obj_datasec (abfd)) {
483 reloc_size = exec_hdr(abfd)->a_drsize;
487 if (asect == obj_textsec (abfd)) {
488 reloc_size = exec_hdr(abfd)->a_trsize;
492 if (asect == obj_bsssec (abfd)) {
497 bfd_set_error (bfd_error_invalid_operation);
501 if (bfd_seek (abfd, (file_ptr)(asect->rel_filepos), SEEK_SET) != 0)
503 count = reloc_size / sizeof (struct relocation_info);
505 relocs = (struct relocation_info *) malloc (reloc_size);
506 if (!relocs && reloc_size != 0) {
507 bfd_set_error (bfd_error_no_memory);
510 reloc_cache = (arelent *) malloc ((count+1) * sizeof (arelent));
513 free ((char*)relocs);
514 bfd_set_error (bfd_error_no_memory);
518 if (bfd_read ((PTR) relocs, 1, reloc_size, abfd) != reloc_size) {
527 if (abfd->xvec->header_byteorder_big_p) {
528 /* big-endian bit field allocation order */
536 /* little-endian bit field allocation order */
545 for (rptr = relocs, cache_ptr = reloc_cache, counter = 0;
547 counter++, rptr++, cache_ptr++)
549 unsigned char *raw = (unsigned char *)rptr;
551 cache_ptr->address = bfd_h_get_32 (abfd, raw + 0);
552 cache_ptr->howto = 0;
553 if (abfd->xvec->header_byteorder_big_p)
555 symnum = (raw[4] << 16) | (raw[5] << 8) | raw[6];
559 symnum = (raw[6] << 16) | (raw[5] << 8) | raw[4];
562 if (raw[7] & extern_mask)
564 /* if this is set then the r_index is a index into the symbol table;
565 * if the bit is not set then r_index contains a section map.
566 * we either fill in the sym entry with a pointer to the symbol,
567 * or point to the correct section
569 cache_ptr->sym_ptr_ptr = symbols + symnum;
570 cache_ptr->addend = 0;
573 /* in a.out symbols are relative to the beginning of the
574 * file rather than sections ?
575 * (look in translate_from_native_sym_flags)
576 * the reloc entry addend has added to it the offset into the
577 * file of the data, so subtract the base to make the reloc
578 * section relative */
581 /* sign-extend symnum from 24 bits to whatever host uses */
586 cache_ptr->sym_ptr_ptr = (asymbol **)NULL;
591 cache_ptr->sym_ptr_ptr = obj_textsec(abfd)->symbol_ptr_ptr;
592 cache_ptr->addend = - obj_textsec(abfd)->vma;
596 cache_ptr->sym_ptr_ptr = obj_datasec(abfd)->symbol_ptr_ptr;
597 cache_ptr->addend = - obj_datasec(abfd)->vma;
601 cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr;
602 cache_ptr->addend = - obj_bsssec(abfd)->vma;
606 cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr;
607 cache_ptr->addend = 0;
609 case -2: /* .align */
610 if (raw[7] & pcrel_mask)
612 cache_ptr->howto = &howto_align_table[(raw[7] >> length_shift) & 3];
613 cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
620 cache_ptr->addend = 0;
629 /* the i960 only has a few relocation types:
630 abs 32-bit and pcrel 24bit. except for callj's! */
631 if (cache_ptr->howto != 0)
633 else if (raw[7] & callj_mask)
635 cache_ptr->howto = &howto_reloc_callj;
637 else if ( raw[7] & pcrel_mask)
639 if (raw[7] & size_mask)
640 cache_ptr->howto = &howto_reloc_pcrel13;
642 cache_ptr->howto = &howto_reloc_pcrel24;
646 if (raw[7] & incode_mask)
648 cache_ptr->howto = &howto_reloc_abs32code;
652 cache_ptr->howto = &howto_reloc_abs32;
655 if (cache_ptr->address < prev_addr)
657 /* Ouch! this reloc is out of order, insert into the right place
660 arelent *cursor = cache_ptr-1;
661 bfd_vma stop = cache_ptr->address;
663 while (cursor->address > stop && cursor >= reloc_cache)
665 cursor[1] = cursor[0];
672 prev_addr = cache_ptr->address;
679 asect->relocation = reloc_cache;
680 asect->reloc_count = count;
688 b_out_squirt_out_relocs (abfd, section)
697 unsigned int count = section->reloc_count;
698 struct relocation_info *native, *natptr;
699 size_t natsize = count * sizeof (struct relocation_info);
700 int extern_mask, pcrel_mask, len_2, callj_mask;
701 if (count == 0) return true;
702 generic = section->orelocation;
703 native = ((struct relocation_info *) malloc (natsize));
704 if (!native && natsize != 0) {
705 bfd_set_error (bfd_error_no_memory);
709 if (abfd->xvec->header_byteorder_big_p)
711 /* Big-endian bit field allocation order */
721 /* Little-endian bit field allocation order */
730 for (natptr = native; count > 0; --count, ++natptr, ++generic)
732 arelent *g = *generic;
733 unsigned char *raw = (unsigned char *)natptr;
734 asymbol *sym = *(g->sym_ptr_ptr);
736 asection *output_section = sym->section->output_section;
738 bfd_h_put_32(abfd, g->address, raw);
739 /* Find a type in the output format which matches the input howto -
740 * at the moment we assume input format == output format FIXME!!
743 /* FIXME: Need callj stuff here, and to check the howto entries to
744 be sure they are real for this architecture. */
745 if (g->howto== &howto_reloc_callj)
747 raw[7] = callj_mask + pcrel_mask + len_2;
749 else if (g->howto == &howto_reloc_pcrel24)
751 raw[7] = pcrel_mask + len_2;
753 else if (g->howto == &howto_reloc_pcrel13)
755 raw[7] = pcrel_mask + len_1;
757 else if (g->howto == &howto_reloc_abs32code)
759 raw[7] = len_2 + incode_mask;
761 else if (g->howto >= howto_align_table
762 && g->howto <= (howto_align_table
763 + sizeof (howto_align_table) / sizeof (howto_align_table[0])
766 /* symnum == -2; extern_mask not set, pcrel_mask set */
770 | ((g->howto - howto_align_table) << 1));
777 /* already mucked with r_extern, r_idx */;
778 else if (bfd_is_com_section (output_section)
779 || bfd_is_abs_section (output_section)
780 || bfd_is_und_section (output_section))
783 if (bfd_abs_section_ptr->symbol == sym)
785 /* Whoops, looked like an abs symbol, but is really an offset
786 from the abs section */
795 r_idx = stoi((*(g->sym_ptr_ptr))->flags);
800 /* Just an ordinary section */
802 r_idx = output_section->target_index;
805 if (abfd->xvec->header_byteorder_big_p) {
806 raw[4] = (unsigned char) (r_idx >> 16);
807 raw[5] = (unsigned char) (r_idx >> 8);
808 raw[6] = (unsigned char) (r_idx );
810 raw[6] = (unsigned char) (r_idx >> 16);
811 raw[5] = (unsigned char) (r_idx>> 8);
812 raw[4] = (unsigned char) (r_idx );
815 raw[7] |= extern_mask;
818 if (bfd_write ((PTR) native, 1, natsize, abfd) != natsize) {
827 /* This is stupid. This function should be a boolean predicate */
829 b_out_canonicalize_reloc (abfd, section, relptr, symbols)
838 if ((section->flags & SEC_CONSTRUCTOR) != 0)
840 arelent_chain *chain = section->constructor_chain;
841 for (count = 0; count < section->reloc_count; count++)
843 *relptr++ = &chain->relent;
849 if (section->relocation == NULL
850 && ! b_out_slurp_reloc_table (abfd, section, symbols))
853 tblptr = section->relocation;
854 for (count = 0; count++ < section->reloc_count;)
855 *relptr++ = tblptr++;
860 return section->reloc_count;
864 b_out_get_reloc_upper_bound (abfd, asect)
868 if (bfd_get_format (abfd) != bfd_object) {
869 bfd_set_error (bfd_error_invalid_operation);
873 if (asect->flags & SEC_CONSTRUCTOR)
874 return sizeof (arelent *) * (asect->reloc_count + 1);
876 if (asect == obj_datasec (abfd))
877 return (sizeof (arelent *) *
878 ((exec_hdr(abfd)->a_drsize / sizeof (struct relocation_info))
881 if (asect == obj_textsec (abfd))
882 return (sizeof (arelent *) *
883 ((exec_hdr(abfd)->a_trsize / sizeof (struct relocation_info))
886 if (asect == obj_bsssec (abfd))
889 bfd_set_error (bfd_error_invalid_operation);
894 b_out_set_section_contents (abfd, section, location, offset, count)
902 if (abfd->output_has_begun == false) { /* set by bfd.c handler */
903 if (! aout_32_make_sections (abfd))
906 obj_textsec (abfd)->filepos = sizeof(struct internal_exec);
907 obj_datasec(abfd)->filepos = obj_textsec(abfd)->filepos
908 + obj_textsec (abfd)->_raw_size;
911 /* regardless, once we know what we're doing, we might as well get going */
912 if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0)
916 return (bfd_write ((PTR)location, 1, count, abfd) == count) ?true:false;
922 b_out_set_arch_mach (abfd, arch, machine)
924 enum bfd_architecture arch;
925 unsigned long machine;
927 bfd_default_set_arch_mach(abfd, arch, machine);
929 if (arch == bfd_arch_unknown) /* Unknown machine arch is OK */
931 if (arch == bfd_arch_i960) /* i960 default is OK */
933 case bfd_mach_i960_core:
934 case bfd_mach_i960_kb_sb:
935 case bfd_mach_i960_mc:
936 case bfd_mach_i960_xa:
937 case bfd_mach_i960_ca:
938 case bfd_mach_i960_ka_sa:
949 b_out_sizeof_headers (ignore_abfd, ignore)
953 return sizeof(struct internal_exec);
958 /************************************************************************/
960 get_value (reloc, link_info, input_section)
962 struct bfd_link_info *link_info;
963 asection *input_section;
966 asymbol *symbol = *(reloc->sym_ptr_ptr);
968 /* A symbol holds a pointer to a section, and an offset from the
969 base of the section. To relocate, we find where the section will
970 live in the output and add that in */
972 if (bfd_is_und_section (symbol->section))
974 struct bfd_link_hash_entry *h;
976 /* The symbol is undefined in this BFD. Look it up in the
977 global linker hash table. FIXME: This should be changed when
978 we convert b.out to use a specific final_link function and
979 change the interface to bfd_relax_section to not require the
981 h = bfd_link_hash_lookup (link_info->hash, bfd_asymbol_name (symbol),
983 if (h != (struct bfd_link_hash_entry *) NULL
984 && (h->type == bfd_link_hash_defined
985 || h->type == bfd_link_hash_defweak))
986 value = h->u.def.value + output_addr (h->u.def.section);
987 else if (h != (struct bfd_link_hash_entry *) NULL
988 && h->type == bfd_link_hash_common)
992 if (! ((*link_info->callbacks->undefined_symbol)
993 (link_info, bfd_asymbol_name (symbol),
994 input_section->owner, input_section, reloc->address)))
1001 value = symbol->value + output_addr (symbol->section);
1004 /* Add the value contained in the relocation */
1005 value += reloc->addend;
1011 perform_slip (abfd, slip, input_section, value)
1014 asection *input_section;
1019 s = _bfd_generic_link_get_symbols (abfd);
1020 BFD_ASSERT (s != (asymbol **) NULL);
1022 /* Find all symbols past this point, and make them know
1027 if (p->section == input_section)
1029 /* This was pointing into this section, so mangle it */
1030 if (p->value > value)
1033 if (p->udata.p != NULL)
1035 struct generic_link_hash_entry *h;
1037 h = (struct generic_link_hash_entry *) p->udata.p;
1038 BFD_ASSERT (h->root.type == bfd_link_hash_defined);
1039 h->root.u.def.value -= slip;
1040 BFD_ASSERT (h->root.u.def.value == p->value);
1049 /* This routine works out if the thing we want to get to can be
1050 reached with a 24bit offset instead of a 32 bit one.
1051 If it can, then it changes the amode */
1054 abs32code (abfd, input_section, r, shrink, link_info)
1056 asection *input_section;
1058 unsigned int shrink;
1059 struct bfd_link_info *link_info;
1061 bfd_vma value = get_value (r, link_info, input_section);
1062 bfd_vma dot = output_addr (input_section) + r->address;
1065 /* See if the address we're looking at within 2^23 bytes of where
1066 we are, if so then we can use a small branch rather than the
1067 jump we were going to */
1069 gap = value - (dot - shrink);
1072 if (-1<<23 < (long)gap && (long)gap < 1<<23 )
1074 /* Change the reloc type from 32bitcode possible 24, to 24bit
1077 r->howto = &howto_reloc_abs32codeshrunk;
1078 /* The place to relc moves back by four bytes */
1081 /* This will be four bytes smaller in the long run */
1083 perform_slip (abfd, 4, input_section, r->address-shrink + 4);
1089 aligncode (abfd, input_section, r, shrink)
1091 asection *input_section;
1093 unsigned int shrink;
1095 bfd_vma dot = output_addr (input_section) + r->address;
1100 int size = r->howto->size;
1102 /* Reduce the size of the alignment so that it's still aligned but
1103 smaller - the current size is already the same size as or bigger
1104 than the alignment required. */
1106 /* calculate the first byte following the padding before we optimize */
1107 old_end = ((dot + size ) & ~size) + size+1;
1108 /* work out where the new end will be - remember that we're smaller
1109 than we used to be */
1110 new_end = ((dot - shrink + size) & ~size);
1112 /* This is the new end */
1113 gap = old_end - ((dot + size) & ~size);
1115 shrink_delta = (old_end - new_end) - shrink;
1119 /* Change the reloc so that it knows how far to align to */
1120 r->howto = howto_done_align_table + (r->howto - howto_align_table);
1122 /* Encode the stuff into the addend - for future use we need to
1123 know how big the reloc used to be */
1124 r->addend = old_end - dot + r->address;
1126 /* This will be N bytes smaller in the long run, adjust all the symbols */
1127 perform_slip (abfd, shrink_delta, input_section, r->address - shrink);
1128 shrink += shrink_delta;
1134 b_out_bfd_relax_section (abfd, i, link_info, again)
1137 struct bfd_link_info *link_info;
1140 /* Get enough memory to hold the stuff */
1141 bfd *input_bfd = i->owner;
1142 asection *input_section = i;
1144 arelent **reloc_vector = NULL;
1145 long reloc_size = bfd_get_reloc_upper_bound(input_bfd,
1151 /* We only run this relaxation once. It might work to run it
1152 multiple times, but it hasn't been tested. */
1159 reloc_vector = (arelent **) malloc (reloc_size);
1160 if (reloc_vector == NULL && reloc_size != 0)
1162 bfd_set_error (bfd_error_no_memory);
1166 /* Get the relocs and think about them */
1168 bfd_canonicalize_reloc (input_bfd, input_section, reloc_vector,
1169 _bfd_generic_link_get_symbols (input_bfd));
1170 if (reloc_count < 0)
1172 if (reloc_count > 0)
1175 for (parent = reloc_vector; *parent; parent++)
1177 arelent *r = *parent;
1178 switch (r->howto->type)
1181 /* An alignment reloc */
1182 shrink = aligncode (abfd, input_section, r, shrink);
1185 /* A 32bit reloc in an addressing mode */
1186 shrink = abs32code (input_bfd, input_section, r, shrink,
1189 case ABS32CODE_SHRUNK:
1196 input_section->_cooked_size = input_section->_raw_size - shrink;
1198 if (reloc_vector != NULL)
1199 free (reloc_vector);
1202 if (reloc_vector != NULL)
1203 free (reloc_vector);
1208 b_out_bfd_get_relocated_section_contents (in_abfd, link_info, link_order,
1209 data, relocateable, symbols)
1211 struct bfd_link_info *link_info;
1212 struct bfd_link_order *link_order;
1214 boolean relocateable;
1217 /* Get enough memory to hold the stuff */
1218 bfd *input_bfd = link_order->u.indirect.section->owner;
1219 asection *input_section = link_order->u.indirect.section;
1220 long reloc_size = bfd_get_reloc_upper_bound(input_bfd,
1222 arelent **reloc_vector = NULL;
1228 /* If producing relocateable output, don't bother to relax. */
1230 return bfd_generic_get_relocated_section_contents (in_abfd, link_info,
1235 reloc_vector = (arelent **) malloc (reloc_size);
1236 if (reloc_vector == NULL && reloc_size != 0)
1238 bfd_set_error (bfd_error_no_memory);
1242 input_section->reloc_done = 1;
1244 /* read in the section */
1245 BFD_ASSERT (true == bfd_get_section_contents(input_bfd,
1249 input_section->_raw_size));
1251 reloc_count = bfd_canonicalize_reloc (input_bfd,
1255 if (reloc_count < 0)
1257 if (reloc_count > 0)
1259 arelent **parent = reloc_vector;
1262 unsigned int dst_address = 0;
1263 unsigned int src_address = 0;
1267 /* Find how long a run we can do */
1268 while (dst_address < link_order->size)
1273 /* Note that the relaxing didn't tie up the addresses in the
1274 relocation, so we use the original address to work out the
1275 run of non-relocated data */
1276 BFD_ASSERT (reloc->address >= src_address);
1277 run = reloc->address - src_address;
1282 run = link_order->size - dst_address;
1284 /* Copy the bytes */
1285 for (idx = 0; idx < run; idx++)
1287 data[dst_address++] = data[src_address++];
1290 /* Now do the relocation */
1294 switch (reloc->howto->type)
1297 calljx_callback (in_abfd, link_info, reloc,
1298 src_address + data, dst_address + data,
1305 (bfd_get_32 (in_abfd, data+src_address)
1306 + get_value (reloc, link_info, input_section)),
1312 callj_callback (in_abfd, link_info, reloc, data, src_address,
1313 dst_address, input_section, false);
1318 BFD_ASSERT (reloc->addend >= src_address);
1319 BFD_ASSERT (reloc->addend <= input_section->_raw_size);
1320 src_address = reloc->addend;
1321 dst_address = ((dst_address + reloc->howto->size)
1322 & ~reloc->howto->size);
1324 case ABS32CODE_SHRUNK:
1325 /* This used to be a callx, but we've found out that a
1326 callj will reach, so do the right thing. */
1327 callj_callback (in_abfd, link_info, reloc, data,
1328 src_address + 4, dst_address, input_section,
1335 long int word = bfd_get_32(in_abfd, data+src_address);
1338 value = get_value (reloc, link_info, input_section);
1339 word = ((word & ~BAL_MASK)
1340 | (((word & BAL_MASK)
1342 - output_addr (input_section)
1346 bfd_put_32(in_abfd,word, data+dst_address);
1355 long int word = bfd_get_32(in_abfd, data+src_address);
1358 value = get_value (reloc, link_info, input_section);
1359 word = ((word & ~PCREL13_MASK)
1360 | (((word & PCREL13_MASK)
1363 - output_addr (input_section))
1366 bfd_put_32(in_abfd,word, data+dst_address);
1379 if (reloc_vector != NULL)
1380 free (reloc_vector);
1383 if (reloc_vector != NULL)
1384 free (reloc_vector);
1387 /***********************************************************************/
1389 /* Build the transfer vectors for Big and Little-Endian B.OUT files. */
1391 #define aout_32_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
1392 #define aout_32_close_and_cleanup aout_32_bfd_free_cached_info
1394 #define b_out_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
1395 #define b_out_bfd_link_add_symbols _bfd_generic_link_add_symbols
1396 #define b_out_bfd_final_link _bfd_generic_final_link
1397 #define b_out_bfd_link_split_section _bfd_generic_link_split_section
1400 const bfd_target b_out_vec_big_host =
1402 "b.out.big", /* name */
1403 bfd_target_aout_flavour,
1404 false, /* data byte order is little */
1405 true, /* hdr byte order is big */
1406 (HAS_RELOC | EXEC_P | /* object flags */
1407 HAS_LINENO | HAS_DEBUG |
1408 HAS_SYMS | HAS_LOCALS | WP_TEXT | BFD_IS_RELAXABLE ),
1409 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
1410 '_', /* symbol leading char */
1411 ' ', /* ar_pad_char */
1412 16, /* ar_max_namelen */
1413 2, /* minumum alignment power */
1415 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
1416 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
1417 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
1418 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1419 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1420 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
1421 {_bfd_dummy_target, b_out_object_p, /* bfd_check_format */
1422 bfd_generic_archive_p, _bfd_dummy_target},
1423 {bfd_false, b_out_mkobject, /* bfd_set_format */
1424 _bfd_generic_mkarchive, bfd_false},
1425 {bfd_false, b_out_write_object_contents, /* bfd_write_contents */
1426 _bfd_write_archive_contents, bfd_false},
1428 BFD_JUMP_TABLE_GENERIC (aout_32),
1429 BFD_JUMP_TABLE_COPY (_bfd_generic),
1430 BFD_JUMP_TABLE_CORE (_bfd_nocore),
1431 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd),
1432 BFD_JUMP_TABLE_SYMBOLS (aout_32),
1433 BFD_JUMP_TABLE_RELOCS (b_out),
1434 BFD_JUMP_TABLE_WRITE (b_out),
1435 BFD_JUMP_TABLE_LINK (b_out),
1436 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
1442 const bfd_target b_out_vec_little_host =
1444 "b.out.little", /* name */
1445 bfd_target_aout_flavour,
1446 false, /* data byte order is little */
1447 false, /* header byte order is little */
1448 (HAS_RELOC | EXEC_P | /* object flags */
1449 HAS_LINENO | HAS_DEBUG |
1450 HAS_SYMS | HAS_LOCALS | WP_TEXT | BFD_IS_RELAXABLE ),
1451 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
1452 '_', /* symbol leading char */
1453 ' ', /* ar_pad_char */
1454 16, /* ar_max_namelen */
1455 2, /* minum align */
1456 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
1457 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
1458 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
1459 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
1460 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
1461 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
1463 {_bfd_dummy_target, b_out_object_p, /* bfd_check_format */
1464 bfd_generic_archive_p, _bfd_dummy_target},
1465 {bfd_false, b_out_mkobject, /* bfd_set_format */
1466 _bfd_generic_mkarchive, bfd_false},
1467 {bfd_false, b_out_write_object_contents, /* bfd_write_contents */
1468 _bfd_write_archive_contents, bfd_false},
1470 BFD_JUMP_TABLE_GENERIC (aout_32),
1471 BFD_JUMP_TABLE_COPY (_bfd_generic),
1472 BFD_JUMP_TABLE_CORE (_bfd_nocore),
1473 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd),
1474 BFD_JUMP_TABLE_SYMBOLS (aout_32),
1475 BFD_JUMP_TABLE_RELOCS (b_out),
1476 BFD_JUMP_TABLE_WRITE (b_out),
1477 BFD_JUMP_TABLE_LINK (b_out),
1478 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),