1 /* BFD back-end for i960 b.out binaries */
3 /* Copyright (C) 1990, 1991 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Diddler.
7 BFD 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 1, or (at your option)
12 BFD 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 BFD; see the file COPYING. If not, write to
19 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
32 #include "libaout.h" /* BFD a.out internal data structures */
35 /* Align an address by rounding it up to a power of two. It leaves the
36 address unchanged if align == 0 (2^0 = alignment of 1 byte) */
37 #define i960_align(addr, align) \
38 ( ((addr) + ((1<<(align))-1)) & (-1 << (align)))
42 PROTO (static boolean, b_out_squirt_out_relocs,(bfd *abfd, asection *section));
43 PROTO (static bfd_target *, b_out_callback, (bfd *));
45 PROTO (boolean, aout_32_slurp_symbol_table, (bfd *abfd));
46 PROTO (void , aout_32_write_syms, ());
48 PROTO (static void, swap_exec_header, (bfd *abfd, struct internal_exec *execp));
52 b_out_little_object_p (abfd)
55 unsigned char magicbytes[LONG_SIZE];
56 struct internal_exec anexec;
58 if (bfd_read ((PTR)magicbytes, 1, LONG_SIZE, abfd) != LONG_SIZE) {
59 bfd_error = system_call_error;
62 anexec.a_magic = _do_getl32 (magicbytes);
64 if (N_BADMAG (anexec)) {
65 bfd_error = wrong_format;
68 return aout_32_some_aout_object_p (abfd, b_out_callback);
72 b_out_big_object_p (abfd)
75 unsigned char magicbytes[LONG_SIZE];
76 struct internal_exec anexec;
78 if (bfd_read ((PTR)magicbytes, 1, LONG_SIZE, abfd) != LONG_SIZE) {
79 bfd_error = system_call_error;
83 anexec.a_magic = _do_getb32 (magicbytes);
85 if (N_BADMAG (anexec)) {
86 bfd_error = wrong_format;
89 return aout_32_some_aout_object_p (abfd, b_out_callback);
92 /* Finish up the opening of a b.out file for reading. Fill in all the
93 fields that are not handled by common code. */
99 struct internal_exec anexec;
100 struct internal_exec *execp = &anexec;
101 unsigned long bss_start;
103 /* Reread the exec header, because the common code didn't get all of
104 our extended header. */
106 if (bfd_seek (abfd, 0L, SEEK_SET) < 0) {
107 bfd_error = system_call_error;
111 /* FIXME, needs to be hacked for character array read-in ala sunos.c. */
112 if (bfd_read ((PTR) execp, 1, sizeof (struct internal_exec), abfd)
113 != sizeof (struct internal_exec)) {
114 bfd_error = wrong_format;
118 swap_exec_header (abfd, execp);
120 /* Architecture and machine type */
121 abfd->obj_arch = bfd_arch_i960; /* B.out only used on i960 */
122 abfd->obj_machine = bfd_mach_i960_core; /* Default */
123 /* FIXME: Set real machine type from file here */
125 /* The positions of the string table and symbol table. */
126 obj_str_filepos (abfd) = N_STROFF (anexec);
127 obj_sym_filepos (abfd) = N_SYMOFF (anexec);
129 /* The alignments of the sections */
130 obj_textsec (abfd)->alignment_power = execp->a_talign;
131 obj_datasec (abfd)->alignment_power = execp->a_dalign;
132 obj_bsssec (abfd)->alignment_power = execp->a_balign;
134 /* The starting addresses of the sections. */
135 obj_textsec (abfd)->vma = anexec.a_tload;
136 obj_datasec (abfd)->vma = anexec.a_dload;
137 bss_start = anexec.a_dload + anexec.a_data; /* BSS = end of data section */
138 obj_bsssec (abfd)->vma = i960_align (bss_start, anexec.a_balign);
140 /* The file positions of the sections */
141 obj_textsec (abfd)->filepos = N_TXTOFF(anexec);
142 obj_datasec (abfd)->filepos = N_DATOFF(anexec);
144 /* The file positions of the relocation info */
145 obj_textsec (abfd)->rel_filepos = N_TROFF(anexec);
146 obj_datasec (abfd)->rel_filepos = N_DROFF(anexec);
153 b_out_mkobject (abfd)
158 bfd_error = system_call_error;
160 /* Use an intermediate variable for clarity */
161 rawptr = (PTR) zalloc (sizeof (struct aoutdata) + sizeof (struct internal_exec));
163 if (rawptr == (PTR)NULL) {
164 bfd_error = no_memory;
168 set_tdata(abfd, (struct aoutdata *) rawptr);
169 exec_hdr (abfd) = (struct internal_exec *) ( (char*)rawptr + sizeof (struct aoutdata));
171 /* For simplicity's sake we just make all the sections right here. */
172 obj_textsec (abfd) = (asection *)NULL;
173 obj_datasec (abfd) = (asection *)NULL;
174 obj_bsssec (abfd) = (asection *)NULL;
176 bfd_make_section (abfd, ".text");
177 bfd_make_section (abfd, ".data");
178 bfd_make_section (abfd, ".bss");
184 b_out_write_object_contents (abfd)
187 struct internal_exec swapped_hdr;
189 exec_hdr (abfd)->a_magic = BMAGIC;
191 exec_hdr (abfd)->a_text = obj_textsec (abfd)->size;
192 exec_hdr (abfd)->a_data = obj_datasec (abfd)->size;
193 exec_hdr (abfd)->a_bss = obj_bsssec (abfd)->size;
194 exec_hdr (abfd)->a_syms = bfd_get_symcount (abfd) * sizeof (struct nlist);
195 exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
196 exec_hdr (abfd)->a_trsize = ((obj_textsec (abfd)->reloc_count) *
197 sizeof (struct relocation_info));
198 exec_hdr (abfd)->a_drsize = ((obj_datasec (abfd)->reloc_count) *
199 sizeof (struct relocation_info));
201 exec_hdr (abfd)->a_talign = obj_textsec (abfd)->alignment_power;
202 exec_hdr (abfd)->a_dalign = obj_datasec (abfd)->alignment_power;
203 exec_hdr (abfd)->a_balign = obj_bsssec (abfd)->alignment_power;
205 exec_hdr (abfd)->a_tload = obj_textsec (abfd)->vma;
206 exec_hdr (abfd)->a_dload = obj_datasec (abfd)->vma;
208 /* FIXME, turn the header into bytes here, to avoid problems with
209 sizes and alignments of its fields. */
210 swapped_hdr = *exec_hdr(abfd);
211 swap_exec_header (abfd, &swapped_hdr);
213 bfd_seek (abfd, 0L, SEEK_SET);
214 bfd_write ((PTR) &swapped_hdr, 1, sizeof (struct internal_exec), abfd);
216 /* Now write out reloc info, followed by syms and strings */
217 if (bfd_get_symcount (abfd) != 0)
220 (long)(N_SYMOFF(*exec_hdr(abfd))), SEEK_SET);
222 aout_32_write_syms (abfd);
224 bfd_seek (abfd, (long)(N_TROFF(*exec_hdr(abfd))), SEEK_SET);
226 if (!b_out_squirt_out_relocs (abfd, obj_textsec (abfd))) return false;
227 bfd_seek (abfd, (long)(N_DROFF(*exec_hdr(abfd))), SEEK_SET);
229 if (!b_out_squirt_out_relocs (abfd, obj_datasec (abfd))) return false;
235 swap_exec_header (abfd, execp)
237 struct internal_exec *execp;
239 #define swapme(field) field = bfd_h_get_32 (abfd, (unsigned char *)&field);
240 swapme (execp->a_magic);
241 swapme (execp->a_text);
242 swapme (execp->a_data);
243 swapme (execp->a_bss);
244 swapme (execp->a_syms);
245 swapme (execp->a_entry);
246 swapme (execp->a_trsize);
247 swapme (execp->a_drsize);
248 swapme (execp->a_tload);
249 swapme (execp->a_dload);
250 /* talign, dalign, and balign are one-byte fields and don't swap. */
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_enum_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 *) malloc (reloc_size);
348 bfd_error = no_memory;
351 reloc_cache = (arelent *) malloc ((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 *) malloc (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);
531 else if (g->section->output_section == obj_datasec(abfd)) {
533 BFD_ASSERT(g->addend + obj_datasec(abfd)->vma == 0);
536 else if (g->section->output_section == obj_bsssec(abfd)) {
538 BFD_ASSERT(g->addend + obj_bsssec(abfd)->vma == 0);
546 if (abfd->xvec->header_byteorder_big_p) {
547 raw[4] = (unsigned char) (symnum >> 16);
548 raw[5] = (unsigned char) (symnum >> 8);
549 raw[6] = (unsigned char) (symnum );
551 raw[6] = (unsigned char) (symnum >> 16);
552 raw[5] = (unsigned char) (symnum >> 8);
553 raw[4] = (unsigned char) (symnum );
557 if ( bfd_write ((PTR) native, 1, natsize, abfd) != natsize) {
566 /* This is stupid. This function should be a boolean predicate */
568 b_out_canonicalize_reloc (abfd, section, relptr, symbols)
574 arelent *tblptr = section->relocation;
575 unsigned int count = 0;
577 if (!(tblptr || b_out_slurp_reloc_table (abfd, section, symbols))) return 0;
578 tblptr = section->relocation;
579 if (!tblptr) return 0;
581 for (; count++ < section->reloc_count;)
582 *relptr++ = tblptr++;
586 return section->reloc_count;
590 b_out_get_reloc_upper_bound (abfd, asect)
594 if (bfd_get_format (abfd) != bfd_object) {
595 bfd_error = invalid_operation;
599 if (asect == obj_datasec (abfd))
600 return (sizeof (arelent *) *
601 ((exec_hdr(abfd)->a_drsize / sizeof (struct relocation_info))
604 if (asect == obj_textsec (abfd))
605 return (sizeof (arelent *) *
606 ((exec_hdr(abfd)->a_trsize / sizeof (struct relocation_info))
609 bfd_error = invalid_operation;
614 b_out_set_section_contents (abfd, section, location, offset, count)
617 unsigned char *location;
621 if (abfd->output_has_begun == false) { /* set by bfd.c handler */
622 if ((obj_textsec (abfd) == NULL) || (obj_datasec (abfd) == NULL) /*||
623 (obj_textsec (abfd)->size == 0) || (obj_datasec (abfd)->size == 0)*/) {
624 bfd_error = invalid_operation;
628 obj_textsec (abfd)->filepos = sizeof(struct internal_exec);
629 obj_datasec(abfd)->filepos = obj_textsec(abfd)->filepos
630 + obj_textsec (abfd)->size;
633 /* regardless, once we know what we're doing, we might as well get going */
634 bfd_seek (abfd, section->filepos + offset, SEEK_SET);
637 return (bfd_write ((PTR)location, 1, count, abfd) == count) ?true:false;
643 b_out_set_arch_mach (abfd, arch, machine)
645 enum bfd_architecture arch;
646 unsigned long machine;
648 abfd->obj_arch = arch;
649 abfd->obj_machine = machine;
650 if (arch == bfd_arch_unknown) /* Unknown machine arch is OK */
652 if (arch == bfd_arch_i960) /* i960 default is OK */
654 case bfd_mach_i960_core:
655 case bfd_mach_i960_kb_sb:
656 case bfd_mach_i960_mc:
657 case bfd_mach_i960_xa:
658 case bfd_mach_i960_ca:
659 case bfd_mach_i960_ka_sa:
670 DEFUN(b_out_sizeof_headers,(abfd, exec),
674 return sizeof(struct internal_exec);
683 /* Build the transfer vectors for Big and Little-Endian B.OUT files. */
685 /* We don't have core files. */
686 #define aout_32_core_file_failing_command _bfd_dummy_core_file_failing_command
687 #define aout_32_core_file_failing_signal _bfd_dummy_core_file_failing_signal
688 #define aout_32_core_file_matches_executable_p \
689 _bfd_dummy_core_file_matches_executable_p
691 /* We use BSD-Unix generic archive files. */
692 #define aout_32_openr_next_archived_file bfd_generic_openr_next_archived_file
693 #define aout_32_generic_stat_arch_elt bfd_generic_stat_arch_elt
694 #define aout_32_slurp_armap bfd_slurp_bsd_armap
695 #define aout_32_slurp_extended_name_table bfd_true
696 #define aout_32_write_armap bsd_write_armap
697 #define aout_32_truncate_arname bfd_bsd_truncate_arname
699 /* We override these routines from the usual a.out file routines. */
700 #define aout_32_canonicalize_reloc b_out_canonicalize_reloc
701 #define aout_32_get_reloc_upper_bound b_out_get_reloc_upper_bound
702 #define aout_32_set_section_contents b_out_set_section_contents
703 #define aout_32_set_arch_mach b_out_set_arch_mach
704 #define aout_32_sizeof_headers b_out_sizeof_headers
706 #define aout_32_bfd_debug_info_start bfd_void
707 #define aout_32_bfd_debug_info_end bfd_void
708 #define aout_32_bfd_debug_info_accumulate (PROTO(void,(*),(bfd*, struct sec *))) bfd_void
711 bfd_target b_out_vec_big_host =
713 "b.out.big", /* name */
714 bfd_target_aout_flavour_enum,
715 false, /* data byte order is little */
716 true, /* hdr byte order is big */
717 (HAS_RELOC | EXEC_P | /* object flags */
718 HAS_LINENO | HAS_DEBUG |
719 HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT ),
720 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
721 ' ', /* ar_pad_char */
722 16, /* ar_max_namelen */
723 2, /* minumum alignment power */
725 _do_getl64, _do_putl64, _do_getl32, _do_putl32, _do_getl16, _do_putl16, /* data */
726 _do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* hdrs */
727 {_bfd_dummy_target, b_out_big_object_p, /* bfd_check_format */
728 bfd_generic_archive_p, _bfd_dummy_target},
729 {bfd_false, b_out_mkobject, /* bfd_set_format */
730 _bfd_generic_mkarchive, bfd_false},
731 {bfd_false, b_out_write_object_contents, /* bfd_write_contents */
732 _bfd_write_archive_contents, bfd_false},
738 bfd_target b_out_vec_little_host =
740 "b.out.little", /* name */
741 bfd_target_aout_flavour_enum,
742 false, /* data byte order is little */
743 false, /* header byte order is little */
744 (HAS_RELOC | EXEC_P | /* object flags */
745 HAS_LINENO | HAS_DEBUG |
746 HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT ),
747 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
748 ' ', /* ar_pad_char */
749 16, /* ar_max_namelen */
751 _do_getl64, _do_putl64, _do_getl32, _do_putl32, _do_getl16, _do_putl16, /* data */
752 _do_getl64, _do_putl64, _do_getl32, _do_putl32, _do_getl16, _do_putl16, /* hdrs */
754 {_bfd_dummy_target, b_out_little_object_p, /* bfd_check_format */
755 bfd_generic_archive_p, _bfd_dummy_target},
756 {bfd_false, b_out_mkobject, /* bfd_set_format */
757 _bfd_generic_mkarchive, bfd_false},
758 {bfd_false, b_out_write_object_contents, /* bfd_write_contents */
759 _bfd_write_archive_contents, bfd_false},