1 /* BFD back-end for Intel 960 b.out binaries.
2 Copyright (C) 1990-1991 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 */
32 PROTO (static boolean, b_out_squirt_out_relocs,(bfd *abfd, asection *section));
33 PROTO (static bfd_target *, b_out_callback, (bfd *));
35 PROTO (boolean, aout_32_slurp_symbol_table, (bfd *abfd));
36 PROTO (void , aout_32_write_syms, ());
38 /* Swaps the information in an executable header taken from a raw byte
39 stream memory image, into the internal exec_header structure. */
41 PROTO(void, bout_swap_exec_header_in,
43 struct external_exec *raw_bytes,
44 struct internal_exec *execp));
47 DEFUN(bout_swap_exec_header_in,(abfd, raw_bytes, execp),
49 struct external_exec *raw_bytes AND
50 struct internal_exec *execp)
52 struct external_exec *bytes = (struct external_exec *)raw_bytes;
54 /* Now fill in fields in the execp, from the bytes in the raw data. */
55 execp->a_info = bfd_h_get_32 (abfd, bytes->e_info);
56 execp->a_text = GET_WORD (abfd, bytes->e_text);
57 execp->a_data = GET_WORD (abfd, bytes->e_data);
58 execp->a_bss = GET_WORD (abfd, bytes->e_bss);
59 execp->a_syms = GET_WORD (abfd, bytes->e_syms);
60 execp->a_entry = GET_WORD (abfd, bytes->e_entry);
61 execp->a_trsize = GET_WORD (abfd, bytes->e_trsize);
62 execp->a_drsize = GET_WORD (abfd, bytes->e_drsize);
63 execp->a_tload = GET_WORD (abfd, bytes->e_tload);
64 execp->a_dload = GET_WORD (abfd, bytes->e_dload);
65 execp->a_talign = bytes->e_talign[0];
66 execp->a_dalign = bytes->e_dalign[0];
67 execp->a_balign = bytes->e_balign[0];
70 /* Swaps the information in an internal exec header structure into the
71 supplied buffer ready for writing to disk. */
73 PROTO(void, bout_swap_exec_header_out,
75 struct internal_exec *execp,
76 struct external_exec *raw_bytes));
78 DEFUN(bout_swap_exec_header_out,(abfd, execp, raw_bytes),
80 struct internal_exec *execp AND
81 struct external_exec *raw_bytes)
83 struct external_exec *bytes = (struct external_exec *)raw_bytes;
85 /* Now fill in fields in the raw data, from the fields in the exec struct. */
86 bfd_h_put_32 (abfd, execp->a_info , bytes->e_info);
87 PUT_WORD (abfd, execp->a_text , bytes->e_text);
88 PUT_WORD (abfd, execp->a_data , bytes->e_data);
89 PUT_WORD (abfd, execp->a_bss , bytes->e_bss);
90 PUT_WORD (abfd, execp->a_syms , bytes->e_syms);
91 PUT_WORD (abfd, execp->a_entry , bytes->e_entry);
92 PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize);
93 PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize);
94 PUT_WORD (abfd, execp->a_tload , bytes->e_tload);
95 PUT_WORD (abfd, execp->a_dload , bytes->e_dload);
96 bytes->e_talign[0] = execp->a_talign;
97 bytes->e_dalign[0] = execp->a_dalign;
98 bytes->e_balign[0] = execp->a_balign;
99 bytes->e_unused[0] = 0; /* Clean structs are godly structs */
104 b_out_object_p (abfd)
107 struct internal_exec anexec;
108 struct external_exec exec_bytes;
110 if (bfd_read ((PTR) &exec_bytes, 1, EXEC_BYTES_SIZE, abfd)
111 != EXEC_BYTES_SIZE) {
112 bfd_error = wrong_format;
116 anexec.a_info = bfd_h_get_32 (abfd, exec_bytes.e_info);
118 if (N_BADMAG (anexec)) {
119 bfd_error = wrong_format;
123 bout_swap_exec_header_in (abfd, &exec_bytes, &anexec);
124 return aout_32_some_aout_object_p (abfd, &anexec, b_out_callback);
128 /* Finish up the opening of a b.out file for reading. Fill in all the
129 fields that are not handled by common code. */
132 b_out_callback (abfd)
135 struct internal_exec *execp = exec_hdr (abfd);
136 unsigned long bss_start;
138 /* Architecture and machine type */
139 bfd_set_arch_mach(abfd,
140 bfd_arch_i960, /* B.out only used on i960 */
141 bfd_mach_i960_core /* Default */
144 /* The positions of the string table and symbol table. */
145 obj_str_filepos (abfd) = N_STROFF (*execp);
146 obj_sym_filepos (abfd) = N_SYMOFF (*execp);
148 /* The alignments of the sections */
149 obj_textsec (abfd)->alignment_power = execp->a_talign;
150 obj_datasec (abfd)->alignment_power = execp->a_dalign;
151 obj_bsssec (abfd)->alignment_power = execp->a_balign;
153 /* The starting addresses of the sections. */
154 obj_textsec (abfd)->vma = execp->a_tload;
155 obj_datasec (abfd)->vma = execp->a_dload;
156 bss_start = execp->a_dload + execp->a_data; /* BSS = end of data section */
157 obj_bsssec (abfd)->vma = align_power (bss_start, execp->a_balign);
159 /* The file positions of the sections */
160 obj_textsec (abfd)->filepos = N_TXTOFF(*execp);
161 obj_datasec (abfd)->filepos = N_DATOFF(*execp);
163 /* The file positions of the relocation info */
164 obj_textsec (abfd)->rel_filepos = N_TROFF(*execp);
165 obj_datasec (abfd)->rel_filepos = N_DROFF(*execp);
167 adata(abfd)->page_size = 1; /* Not applicable. */
168 adata(abfd)->segment_size = 1; /* Not applicable. */
169 adata(abfd)->exec_bytes_size = EXEC_BYTES_SIZE;
176 struct internal_exec e;
180 b_out_mkobject (abfd)
183 struct container *rawptr;
185 rawptr = (struct container *) bfd_zalloc (abfd, sizeof (struct container));
186 if (rawptr == NULL) {
187 bfd_error = no_memory;
191 set_tdata (abfd, &rawptr->a);
192 exec_hdr (abfd) = &rawptr->e;
194 /* For simplicity's sake we just make all the sections right here. */
195 obj_textsec (abfd) = (asection *)NULL;
196 obj_datasec (abfd) = (asection *)NULL;
197 obj_bsssec (abfd) = (asection *)NULL;
199 bfd_make_section (abfd, ".text");
200 bfd_make_section (abfd, ".data");
201 bfd_make_section (abfd, ".bss");
207 b_out_write_object_contents (abfd)
210 struct external_exec swapped_hdr;
212 exec_hdr (abfd)->a_info = BMAGIC;
214 exec_hdr (abfd)->a_text = obj_textsec (abfd)->size;
215 exec_hdr (abfd)->a_data = obj_datasec (abfd)->size;
216 exec_hdr (abfd)->a_bss = obj_bsssec (abfd)->size;
217 exec_hdr (abfd)->a_syms = bfd_get_symcount (abfd) * sizeof (struct nlist);
218 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
219 exec_hdr (abfd)->a_trsize = ((obj_textsec (abfd)->reloc_count) *
220 sizeof (struct relocation_info));
221 exec_hdr (abfd)->a_drsize = ((obj_datasec (abfd)->reloc_count) *
222 sizeof (struct relocation_info));
224 exec_hdr (abfd)->a_talign = obj_textsec (abfd)->alignment_power;
225 exec_hdr (abfd)->a_dalign = obj_datasec (abfd)->alignment_power;
226 exec_hdr (abfd)->a_balign = obj_bsssec (abfd)->alignment_power;
228 exec_hdr (abfd)->a_tload = obj_textsec (abfd)->vma;
229 exec_hdr (abfd)->a_dload = obj_datasec (abfd)->vma;
231 bout_swap_exec_header_out (abfd, exec_hdr (abfd), &swapped_hdr);
233 bfd_seek (abfd, 0L, SEEK_SET);
234 bfd_write ((PTR) &swapped_hdr, 1, EXEC_BYTES_SIZE, abfd);
236 /* Now write out reloc info, followed by syms and strings */
237 if (bfd_get_symcount (abfd) != 0)
240 (long)(N_SYMOFF(*exec_hdr(abfd))), SEEK_SET);
242 aout_32_write_syms (abfd);
244 bfd_seek (abfd, (long)(N_TROFF(*exec_hdr(abfd))), SEEK_SET);
246 if (!b_out_squirt_out_relocs (abfd, obj_textsec (abfd))) return false;
247 bfd_seek (abfd, (long)(N_DROFF(*exec_hdr(abfd))), SEEK_SET);
249 if (!b_out_squirt_out_relocs (abfd, obj_datasec (abfd))) return false;
254 /** Some reloc hackery */
256 #define CALLS 0x66003800 /* Template for 'calls' instruction */
257 #define BAL 0x0b000000 /* Template for 'bal' instruction */
258 #define BAL_MASK 0x00ffffff
260 static bfd_reloc_status_type
261 callj_callback(abfd, reloc_entry, symbol_in, data, input_section)
263 arelent *reloc_entry;
266 asection *input_section;
268 int word = bfd_get_32(abfd, data+reloc_entry->address);
269 aout_symbol_type *symbol = aout_symbol(symbol_in);
271 if (IS_OTHER(symbol->other)) {
272 /* Call to a system procedure - replace code with system
276 word = CALLS | (symbol->other - 1);
277 bfd_put_32(abfd, word, data+reloc_entry->address); /* replace */
281 if (IS_CALLNAME(symbol->other)) {
282 aout_symbol_type *balsym = symbol+1;
283 /* The next symbol should be an N_BALNAME */
284 BFD_ASSERT(IS_BALNAME(balsym->other));
286 /* We are calling a leaf - so replace the call instruction
290 (((word & BAL_MASK) +
291 balsym->symbol.section->output_offset +
292 balsym->symbol.section->output_section->vma+
293 balsym->symbol.value + reloc_entry->addend -
294 ( input_section->output_section->vma + input_section->output_offset))
297 bfd_put_32(abfd, word, data+reloc_entry->address); /* replace */
300 return bfd_reloc_continue;
303 /* type rshift size bitsize pcrel bitpos absolute overflow check*/
306 static reloc_howto_type howto_reloc_callj =
307 HOWTO( 3, 0, 2, 24, true, 0, true, true, callj_callback,"callj", true, 0x00ffffff, 0x00ffffff,false);
308 static reloc_howto_type howto_reloc_abs32 =
309 HOWTO(1, 0, 2, 32, false, 0, true, true,0,"abs32", true, 0xffffffff,0xffffffff,false);
310 static reloc_howto_type howto_reloc_pcrel24 =
311 HOWTO(2, 0, 2, 24, true, 0, true, true,0,"pcrel24", true, 0x00ffffff,0x00ffffff,false);
313 /* Allocate enough room for all the reloc entries, plus pointers to them all */
316 b_out_slurp_reloc_table (abfd, asect, symbols)
323 struct relocation_info *relocs;
324 arelent *reloc_cache;
326 if (asect->relocation) return true;
327 if (!aout_32_slurp_symbol_table (abfd)) return false;
329 if (asect == obj_datasec (abfd)) {
330 reloc_size = exec_hdr(abfd)->a_drsize;
334 if (asect == obj_textsec (abfd)) {
335 reloc_size = exec_hdr(abfd)->a_trsize;
339 bfd_error = invalid_operation;
343 bfd_seek (abfd, (long)(asect->rel_filepos), SEEK_SET);
344 count = reloc_size / sizeof (struct relocation_info);
346 relocs = (struct relocation_info *) bfd_xmalloc (reloc_size);
348 bfd_error = no_memory;
351 reloc_cache = (arelent *) bfd_xmalloc ((count+1) * sizeof (arelent));
353 free ((char*)relocs);
354 bfd_error = no_memory;
358 if (bfd_read ((PTR) relocs, 1, reloc_size, abfd) != reloc_size) {
359 bfd_error = system_call_error;
366 register struct relocation_info *rptr = relocs;
367 unsigned int counter = 0;
368 arelent *cache_ptr = reloc_cache;
369 int extern_mask, pcrel_mask, callj_mask;
371 if (abfd->xvec->header_byteorder_big_p) {
372 /* Big-endian bit field allocation order */
377 /* Little-endian bit field allocation order */
383 for (; counter < count; counter++, rptr++, cache_ptr++)
385 unsigned char *raw = (unsigned char *)rptr;
387 cache_ptr->address = bfd_h_get_32 (abfd, raw + 0);
388 if (abfd->xvec->header_byteorder_big_p) {
389 symnum = (raw[4] << 16) | (raw[5] << 8) | raw[6];
391 symnum = (raw[6] << 16) | (raw[5] << 8) | raw[4];
394 if (raw[7] & extern_mask) {
395 /* If this is set then the r_index is a index into the symbol table;
396 * if the bit is not set then r_index contains a section map.
397 * We either fill in the sym entry with a pointer to the symbol,
398 * or point to the correct section
400 cache_ptr->sym_ptr_ptr = symbols + symnum;
401 cache_ptr->addend = 0;
402 cache_ptr->section = (asection*)NULL;
404 /* In a.out symbols are relative to the beginning of the
405 * file rather than sections ?
406 * (look in translate_from_native_sym_flags)
407 * The reloc entry addend has added to it the offset into the
408 * file of the data, so subtract the base to make the reloc
409 * section relative */
410 cache_ptr->sym_ptr_ptr = (asymbol **)NULL;
414 cache_ptr->section = obj_textsec(abfd);
415 cache_ptr->addend = -obj_textsec(abfd)->vma;
419 cache_ptr->section = obj_datasec(abfd);
420 cache_ptr->addend = - obj_datasec(abfd)->vma;
424 cache_ptr->section = obj_bsssec(abfd);
425 cache_ptr->addend = - obj_bsssec(abfd)->vma;
438 /* The i960 only has a few relocation types:
439 abs 32-bit and pcrel 24bit. Except for callj's! */
440 if (raw[7] & callj_mask)
441 cache_ptr->howto = &howto_reloc_callj;
442 else if ( raw[7] & pcrel_mask)
443 cache_ptr->howto = &howto_reloc_pcrel24;
445 cache_ptr->howto = &howto_reloc_abs32;
450 asect->relocation = reloc_cache;
451 asect->reloc_count = count;
457 b_out_squirt_out_relocs (abfd, section)
463 unsigned int count = section->reloc_count;
464 struct relocation_info *native, *natptr;
465 size_t natsize = count * sizeof (struct relocation_info);
466 int extern_mask, pcrel_mask, len_2, callj_mask;
467 if (count == 0) return true;
468 generic = section->orelocation;
469 native = ((struct relocation_info *) bfd_xmalloc (natsize));
471 bfd_error = no_memory;
475 if (abfd->xvec->header_byteorder_big_p) {
476 /* Big-endian bit field allocation order */
482 /* Little-endian bit field allocation order */
489 for (natptr = native; count > 0; --count, ++natptr, ++generic)
491 arelent *g = *generic;
492 unsigned char *raw = (unsigned char *)natptr;
495 bfd_h_put_32(abfd, g->address, raw);
496 /* Find a type in the output format which matches the input howto -
497 * at the moment we assume input format == output format FIXME!!
499 /* FIXME: Need callj stuff here, and to check the howto entries to
500 be sure they are real for this architecture. */
501 if (g->howto== &howto_reloc_callj) {
502 raw[7] = callj_mask + pcrel_mask + len_2;
504 else if (g->howto == &howto_reloc_pcrel24) {
505 raw[7] = pcrel_mask +len_2;
510 if (g->sym_ptr_ptr != (asymbol **)NULL)
512 /* name clobbered by aout_write_syms to be symbol index*/
513 if ((*(g->sym_ptr_ptr))->section) {
514 /* replace the section offset into the addent */
515 g->addend += (*(g->sym_ptr_ptr))->section->vma ;
517 symnum = stoi((*(g->sym_ptr_ptr))->name);
518 raw[7] |= extern_mask;
519 BFD_ASSERT(g->addend == 0);
522 if (g->section == (asection *)NULL) {
526 else if(g->section->output_section == obj_textsec(abfd)) {
528 BFD_ASSERT(g->addend + obj_textsec(abfd)->vma == 0);
530 else if (g->section->output_section == obj_datasec(abfd)) {
532 BFD_ASSERT(g->addend + obj_datasec(abfd)->vma == 0);
534 else if (g->section->output_section == obj_bsssec(abfd)) {
536 BFD_ASSERT(g->addend + obj_bsssec(abfd)->vma == 0);
543 if (abfd->xvec->header_byteorder_big_p) {
544 raw[4] = (unsigned char) (symnum >> 16);
545 raw[5] = (unsigned char) (symnum >> 8);
546 raw[6] = (unsigned char) (symnum );
548 raw[6] = (unsigned char) (symnum >> 16);
549 raw[5] = (unsigned char) (symnum >> 8);
550 raw[4] = (unsigned char) (symnum );
554 if (bfd_write ((PTR) native, 1, natsize, abfd) != natsize) {
563 /* This is stupid. This function should be a boolean predicate */
565 b_out_canonicalize_reloc (abfd, section, relptr, symbols)
571 arelent *tblptr = section->relocation;
572 unsigned int count = 0;
574 if (!(tblptr || b_out_slurp_reloc_table (abfd, section, symbols))) return 0;
575 tblptr = section->relocation;
576 if (!tblptr) return 0;
578 for (; count++ < section->reloc_count;)
579 *relptr++ = tblptr++;
583 return section->reloc_count;
587 b_out_get_reloc_upper_bound (abfd, asect)
591 if (bfd_get_format (abfd) != bfd_object) {
592 bfd_error = invalid_operation;
596 if (asect == obj_datasec (abfd))
597 return (sizeof (arelent *) *
598 ((exec_hdr(abfd)->a_drsize / sizeof (struct relocation_info))
601 if (asect == obj_textsec (abfd))
602 return (sizeof (arelent *) *
603 ((exec_hdr(abfd)->a_trsize / sizeof (struct relocation_info))
606 bfd_error = invalid_operation;
611 b_out_set_section_contents (abfd, section, location, offset, count)
614 unsigned char *location;
618 if (abfd->output_has_begun == false) { /* set by bfd.c handler */
619 if ((obj_textsec (abfd) == NULL) || (obj_datasec (abfd) == NULL) /*||
620 (obj_textsec (abfd)->size == 0) || (obj_datasec (abfd)->size == 0)*/) {
621 bfd_error = invalid_operation;
625 obj_textsec (abfd)->filepos = sizeof(struct internal_exec);
626 obj_datasec(abfd)->filepos = obj_textsec(abfd)->filepos
627 + obj_textsec (abfd)->size;
630 /* regardless, once we know what we're doing, we might as well get going */
631 bfd_seek (abfd, section->filepos + offset, SEEK_SET);
634 return (bfd_write ((PTR)location, 1, count, abfd) == count) ?true:false;
640 b_out_set_arch_mach (abfd, arch, machine)
642 enum bfd_architecture arch;
643 unsigned long machine;
645 bfd_default_set_arch_mach(abfd, arch, machine);
647 if (arch == bfd_arch_unknown) /* Unknown machine arch is OK */
649 if (arch == bfd_arch_i960) /* i960 default is OK */
651 case bfd_mach_i960_core:
652 case bfd_mach_i960_kb_sb:
653 case bfd_mach_i960_mc:
654 case bfd_mach_i960_xa:
655 case bfd_mach_i960_ca:
656 case bfd_mach_i960_ka_sa:
667 DEFUN(b_out_sizeof_headers,(ignore_abfd, ignore),
671 return sizeof(struct internal_exec);
677 /* Build the transfer vectors for Big and Little-Endian B.OUT files. */
679 /* We don't have core files. */
680 #define aout_32_core_file_failing_command _bfd_dummy_core_file_failing_command
681 #define aout_32_core_file_failing_signal _bfd_dummy_core_file_failing_signal
682 #define aout_32_core_file_matches_executable_p \
683 _bfd_dummy_core_file_matches_executable_p
685 /* We use BSD-Unix generic archive files. */
686 #define aout_32_openr_next_archived_file bfd_generic_openr_next_archived_file
687 #define aout_32_generic_stat_arch_elt bfd_generic_stat_arch_elt
688 #define aout_32_slurp_armap bfd_slurp_bsd_armap
689 #define aout_32_slurp_extended_name_table bfd_true
690 #define aout_32_write_armap bsd_write_armap
691 #define aout_32_truncate_arname bfd_bsd_truncate_arname
693 /* We override these routines from the usual a.out file routines. */
694 #define aout_32_canonicalize_reloc b_out_canonicalize_reloc
695 #define aout_32_get_reloc_upper_bound b_out_get_reloc_upper_bound
696 #define aout_32_set_section_contents b_out_set_section_contents
697 #define aout_32_set_arch_mach b_out_set_arch_mach
698 #define aout_32_sizeof_headers b_out_sizeof_headers
700 #define aout_32_bfd_debug_info_start bfd_void
701 #define aout_32_bfd_debug_info_end bfd_void
702 #define aout_32_bfd_debug_info_accumulate (PROTO(void,(*),(bfd*, struct sec *))) bfd_void
705 bfd_target b_out_vec_big_host =
707 "b.out.big", /* name */
708 bfd_target_aout_flavour,
709 false, /* data byte order is little */
710 true, /* hdr byte order is big */
711 (HAS_RELOC | EXEC_P | /* object flags */
712 HAS_LINENO | HAS_DEBUG |
713 HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT ),
714 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
715 ' ', /* ar_pad_char */
716 16, /* ar_max_namelen */
717 2, /* minumum alignment power */
719 _do_getl64, _do_putl64, _do_getl32, _do_putl32, _do_getl16, _do_putl16, /* data */
720 _do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* hdrs */
721 {_bfd_dummy_target, b_out_object_p, /* bfd_check_format */
722 bfd_generic_archive_p, _bfd_dummy_target},
723 {bfd_false, b_out_mkobject, /* bfd_set_format */
724 _bfd_generic_mkarchive, bfd_false},
725 {bfd_false, b_out_write_object_contents, /* bfd_write_contents */
726 _bfd_write_archive_contents, bfd_false},
732 bfd_target b_out_vec_little_host =
734 "b.out.little", /* name */
735 bfd_target_aout_flavour,
736 false, /* data byte order is little */
737 false, /* header byte order is little */
738 (HAS_RELOC | EXEC_P | /* object flags */
739 HAS_LINENO | HAS_DEBUG |
740 HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT ),
741 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
742 ' ', /* ar_pad_char */
743 16, /* ar_max_namelen */
745 _do_getl64, _do_putl64, _do_getl32, _do_putl32, _do_getl16, _do_putl16, /* data */
746 _do_getl64, _do_putl64, _do_getl32, _do_putl32, _do_getl16, _do_putl16, /* hdrs */
748 {_bfd_dummy_target, b_out_object_p, /* bfd_check_format */
749 bfd_generic_archive_p, _bfd_dummy_target},
750 {bfd_false, b_out_mkobject, /* bfd_set_format */
751 _bfd_generic_mkarchive, bfd_false},
752 {bfd_false, b_out_write_object_contents, /* bfd_write_contents */
753 _bfd_write_archive_contents, bfd_false},