1 /* BFD back-end for VERSAdos-E objects.
2 Copyright 1995, 96, 97, 98, 1999 Free Software Foundation, Inc.
3 Written by Steve Chamberlain of Cygnus Support <sac@cygnus.com>.
5 Versados is a Motorola trademark.
7 This file is part of BFD, the Binary File Descriptor library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 VERSAdos-E relocateable object file format
29 This module supports reading of VERSAdos relocateable
32 A VERSAdos file looks like contains
34 o Indentification Record
35 o External Symbol Definition Record
45 #include "libiberty.h"
48 static boolean versados_mkobject PARAMS ((bfd *));
49 static boolean versados_scan PARAMS ((bfd *));
50 static const bfd_target *versados_object_p PARAMS ((bfd *));
59 #define ES_BASE 17 /* first symbol has esdid 17 */
61 /* Per file target dependent information */
63 /* one for each section */
66 asection *section; /* ptr to bfd version */
67 unsigned char *contents; /* used to build image */
69 int relocs; /* reloc count, valid end of pass 1 */
70 int donerel; /* have relocs been translated */
73 typedef struct versados_data_struct
75 int es_done; /* count of symbol index, starts at ES_BASE */
76 asymbol *symbols; /* pointer to local symbols */
77 char *strings; /* strings of all the above */
78 int stringlen; /* len of string table (valid end of pass1) */
79 int nsecsyms; /* number of sections */
81 int ndefs; /* number of exported symbols (they dont get esdids) */
82 int nrefs; /* number of imported symbols (valid end of pass1) */
84 int ref_idx; /* current processed value of the above */
89 struct esdid e[16]; /* per section info */
90 int alert; /* to see if we're trampling */
91 asymbol *rest[256 - 16]; /* per symbol info */
96 #define VDATA(abfd) (abfd->tdata.versados_data)
97 #define EDATA(abfd, n) (abfd->tdata.versados_data->e[n])
98 #define RDATA(abfd, n) (abfd->tdata.versados_data->rest[n])
104 unsigned char map[4];
106 unsigned char data[200];
112 char type; /* record type */
113 char name[10]; /* module name */
114 char rev; /* module rev number */
130 unsigned char esd_entries[1];
134 #define ESD_STD_REL_SEC 2
135 #define ESD_SHRT_REL_SEC 3
136 #define ESD_XDEF_IN_SEC 4
137 #define ESD_XREF_SYM 7
138 #define ESD_XREF_SEC 6
139 #define ESD_XDEF_IN_ABS 5
143 struct ext_vheader header;
148 /* Initialize by filling in the hex conversion array. */
154 /* Set up the tdata information. */
157 versados_mkobject (abfd)
160 if (abfd->tdata.versados_data == NULL)
162 tdata_type *tdata = (tdata_type *) bfd_alloc (abfd, sizeof (tdata_type));
165 abfd->tdata.versados_data = tdata;
166 tdata->symbols = NULL;
167 VDATA (abfd)->alert = 0x12345678;
170 bfd_default_set_arch_mach (abfd, bfd_arch_m68k, 0);
175 /* Report a problem in an S record file. FIXME: This probably should
176 not call fprintf, but we really do need some mechanism for printing
182 versados_new_symbol (abfd, snum, name, val, sec)
189 asymbol *n = VDATA (abfd)->symbols + snum;
200 get_record (abfd, ptr)
204 bfd_read (&ptr->size, 1, 1, abfd);
205 if (bfd_read ((char *) ptr + 1, 1, ptr->size, abfd) != ptr->size)
214 unsigned char *p = *pp;
216 return (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | (p[3] << 0);
224 char *p = (char *) *pp;
237 new_symbol_string (abfd, name)
241 char *n = VDATA (abfd)->strings;
242 strcpy (VDATA (abfd)->strings, name);
243 VDATA (abfd)->strings += strlen (VDATA (abfd)->strings) + 1;
249 process_esd (abfd, esd, pass)
254 /* Read through the ext def for the est entries */
255 int togo = esd->size - 2;
260 unsigned char *ptr = esd->esd_entries;
261 unsigned char *end = ptr + togo;
264 int scn = *ptr & 0xf;
265 int typ = (*ptr >> 4) & 0xf;
267 /* Declare this section */
268 sprintf (name, "%d", scn);
269 sec = bfd_make_section_old_way (abfd, strdup (name));
270 sec->target_index = scn;
271 EDATA (abfd, scn).section = sec;
280 int snum = VDATA (abfd)->ref_idx++;
284 VDATA (abfd)->stringlen += strlen (name) + 1;
290 char *n = new_symbol_string (abfd, name);
291 s = versados_new_symbol (abfd, snum, n, 0,
292 &bfd_und_section, scn);
293 esidx = VDATA (abfd)->es_done++;
294 RDATA (abfd, esidx - ES_BASE) = s;
302 start = get_4 (&ptr);
304 case ESD_STD_REL_SEC:
305 case ESD_SHRT_REL_SEC:
307 sec->_raw_size = get_4 (&ptr);
308 sec->flags |= SEC_ALLOC;
311 case ESD_XDEF_IN_ABS:
312 sec = (asection *) & bfd_abs_section;
313 case ESD_XDEF_IN_SEC:
315 int snum = VDATA (abfd)->def_idx++;
321 /* Just remember the symbol */
322 VDATA (abfd)->stringlen += strlen (name) + 1;
327 char *n = new_symbol_string (abfd, name);
328 s = versados_new_symbol (abfd, snum + VDATA (abfd)->nrefs, n, val, sec, scn);
329 s->flags |= BSF_GLOBAL;
339 #define R_RELWORD_NEG 3
340 #define R_RELLONG_NEG 4
342 reloc_howto_type versados_howto_table[] =
344 HOWTO (R_RELWORD, 0, 1, 16, false,
345 0, complain_overflow_dont, 0,
346 "+v16", true, 0x0000ffff, 0x0000ffff, false),
347 HOWTO (R_RELLONG, 0, 2, 32, false,
348 0, complain_overflow_dont, 0,
349 "+v32", true, 0xffffffff, 0xffffffff, false),
351 HOWTO (R_RELWORD_NEG, 0, -1, 16, false,
352 0, complain_overflow_dont, 0,
353 "-v16", true, 0x0000ffff, 0x0000ffff, false),
354 HOWTO (R_RELLONG_NEG, 0, -2, 32, false,
355 0, complain_overflow_dont, 0,
356 "-v32", true, 0xffffffff, 0xffffffff, false),
361 get_offset (len, ptr)
372 for (i = 1; i < len; i++)
373 val = (val << 8) | *ptr++;
380 process_otr (abfd, otr, pass)
386 unsigned char *srcp = otr->data;
387 unsigned char *endp = (unsigned char *) otr + otr->size;
388 unsigned int bits = (otr->map[0] << 24)
389 | (otr->map[1] << 16)
391 | (otr->map[3] << 0);
393 struct esdid *esdid = &EDATA (abfd, otr->esdid - 1);
394 unsigned char *contents = esdid->contents;
395 int need_contents = 0;
396 unsigned int dst_idx = esdid->pc;
398 for (shift = (1 << 31); shift && srcp < endp; shift >>= 1)
403 int esdids = (flag >> 5) & 0x7;
404 int sizeinwords = ((flag >> 3) & 1) ? 2 : 1;
405 int offsetlen = flag & 0x7;
411 /* A zero esdid means the new pc is the offset given */
412 dst_idx += get_offset (offsetlen, srcp);
417 int val = get_offset (offsetlen, srcp + esdids);
421 for (j = 0; j < sizeinwords * 2; j++)
423 contents[dst_idx + (sizeinwords * 2) - j - 1] = val;
427 for (j = 0; j < esdids; j++)
433 int rn = EDATA (abfd, otr->esdid - 1).relocs++;
436 /* this is the first pass over the data,
437 just remember that we need a reloc */
442 EDATA (abfd, otr->esdid - 1).section->relocation + rn;
443 n->address = dst_idx;
445 n->sym_ptr_ptr = (asymbol **) esdid;
447 n->howto = versados_howto_table + ((j & 1) * 2) + (sizeinwords - 1);
452 dst_idx += sizeinwords * 2;
458 if (dst_idx < esdid->section->_raw_size)
461 /* absolute code, comes in 16 bit lumps */
462 contents[dst_idx] = srcp[0];
463 contents[dst_idx + 1] = srcp[1];
469 EDATA (abfd, otr->esdid - 1).pc = dst_idx;
471 if (!contents && need_contents)
472 esdid->contents = (unsigned char *) bfd_alloc (abfd, esdid->section->_raw_size);
486 VDATA (abfd)->nrefs = 0;
487 VDATA (abfd)->ndefs = 0;
488 VDATA (abfd)->ref_idx = 0;
489 VDATA (abfd)->def_idx = 0;
494 if (!get_record (abfd, &any))
496 switch (any.header.type)
504 process_esd (abfd, &any.esd, 1);
507 process_otr (abfd, &any.otr, 1);
512 /* Now allocate space for the relocs and sections */
514 VDATA (abfd)->nrefs = VDATA (abfd)->ref_idx;
515 VDATA (abfd)->ndefs = VDATA (abfd)->def_idx;
516 VDATA (abfd)->ref_idx = 0;
517 VDATA (abfd)->def_idx = 0;
519 abfd->symcount = VDATA (abfd)->nrefs + VDATA (abfd)->ndefs;
521 for (i = 0; i < 16; i++)
523 struct esdid *esdid = &EDATA (abfd, i);
526 esdid->section->relocation
527 = (arelent *) bfd_alloc (abfd, sizeof (arelent) * esdid->relocs);
532 esdid->section->flags |= SEC_HAS_CONTENTS | SEC_LOAD;
534 esdid->section->reloc_count = esdid->relocs;
536 esdid->section->flags |= SEC_RELOC;
540 /* Add an entry into the symbol table for it */
542 VDATA (abfd)->stringlen += strlen (esdid->section->name) + 1;
546 abfd->symcount += nsecs;
548 VDATA (abfd)->symbols = (asymbol *) bfd_alloc (abfd,
549 sizeof (asymbol) * (abfd->symcount));
551 VDATA (abfd)->strings = bfd_alloc (abfd, VDATA (abfd)->stringlen);
553 if ((VDATA (abfd)->symbols == NULL && abfd->symcount > 0)
554 || (VDATA (abfd)->strings == NULL && VDATA (abfd)->stringlen > 0))
557 /* Actually fill in the section symbols,
558 we stick them at the end of the table */
560 for (j = VDATA (abfd)->nrefs + VDATA (abfd)->ndefs, i = 0; i < 16; i++)
562 struct esdid *esdid = &EDATA (abfd, i);
563 asection *sec = esdid->section;
566 asymbol *s = VDATA (abfd)->symbols + j;
567 s->name = new_symbol_string (abfd, sec->name);
569 s->flags = BSF_LOCAL;
576 abfd->flags |= HAS_SYMS;
578 /* Set this to nsecs - since we've already planted the section
580 VDATA (abfd)->nsecsyms = nsecs;
582 VDATA (abfd)->ref_idx = 0;
589 /* Check whether an existing file is a versados file. */
591 static const bfd_target *
592 versados_object_p (abfd)
595 struct ext_vheader ext;
598 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
601 if (bfd_read (&len, 1, 1, abfd) != 1)
603 if (bfd_get_error () != bfd_error_system_call)
604 bfd_set_error (bfd_error_wrong_format);
608 if (bfd_read (&ext.type, 1, len, abfd) != len)
610 if (bfd_get_error () != bfd_error_system_call)
611 bfd_set_error (bfd_error_wrong_format);
615 /* We guess that the language field will never be larger than 10.
616 In sample files, it is always either 0 or 1. Checking for this
617 prevents confusion with Intel Hex files. */
618 if (ext.type != VHEADER
621 bfd_set_error (bfd_error_wrong_format);
625 /* OK, looks like a record, build the tdata and read in. */
627 if (!versados_mkobject (abfd)
628 || !versados_scan (abfd))
636 versados_pass_2 (abfd)
641 if (VDATA (abfd)->pass_2_done)
644 if (bfd_seek (abfd, 0, SEEK_SET) != 0)
647 VDATA (abfd)->es_done = ES_BASE;
650 /* read records till we get to where we want to be */
654 get_record (abfd, &any);
655 switch (any.header.type)
658 VDATA (abfd)->pass_2_done = 1;
661 process_esd (abfd, &any.esd, 2);
664 process_otr (abfd, &any.otr, 2);
671 versados_get_section_contents (abfd, section, location, offset, count)
678 if (!versados_pass_2 (abfd))
682 EDATA (abfd, section->target_index).contents + offset,
688 #define versados_get_section_contents_in_window \
689 _bfd_generic_get_section_contents_in_window
692 versados_set_section_contents (abfd, section, location, offset, bytes_to_do)
693 bfd *abfd ATTRIBUTE_UNUSED;
694 sec_ptr section ATTRIBUTE_UNUSED;
695 PTR location ATTRIBUTE_UNUSED;
696 file_ptr offset ATTRIBUTE_UNUSED;
697 bfd_size_type bytes_to_do ATTRIBUTE_UNUSED;
705 versados_sizeof_headers (abfd, exec)
706 bfd *abfd ATTRIBUTE_UNUSED;
707 boolean exec ATTRIBUTE_UNUSED;
713 versados_make_empty_symbol (abfd)
716 asymbol *new = (asymbol *) bfd_zalloc (abfd, sizeof (asymbol));
722 /* Return the amount of memory needed to read the symbol table. */
725 versados_get_symtab_upper_bound (abfd)
728 return (bfd_get_symcount (abfd) + 1) * sizeof (asymbol *);
731 /* Return the symbol table. */
734 versados_get_symtab (abfd, alocation)
738 unsigned int symcount = bfd_get_symcount (abfd);
742 versados_pass_2 (abfd);
744 for (i = 0, s = VDATA (abfd)->symbols;
758 versados_get_symbol_info (ignore_abfd, symbol, ret)
759 bfd *ignore_abfd ATTRIBUTE_UNUSED;
763 bfd_symbol_info (symbol, ret);
768 versados_print_symbol (ignore_abfd, afile, symbol, how)
769 bfd *ignore_abfd ATTRIBUTE_UNUSED;
772 bfd_print_symbol_type how;
774 FILE *file = (FILE *) afile;
777 case bfd_print_symbol_name:
778 fprintf (file, "%s", symbol->name);
781 bfd_print_symbol_vandf ((PTR) file, symbol);
782 fprintf (file, " %-5s %s",
783 symbol->section->name,
790 versados_get_reloc_upper_bound (abfd, asect)
791 bfd *abfd ATTRIBUTE_UNUSED;
794 return (asect->reloc_count + 1) * sizeof (arelent *);
799 versados_canonicalize_reloc (abfd, section, relptr, symbols)
808 versados_pass_2 (abfd);
809 src = section->relocation;
810 if (!EDATA (abfd, section->target_index).donerel)
812 EDATA (abfd, section->target_index).donerel = 1;
813 /* translate from indexes to symptr ptrs */
814 for (count = 0; count < section->reloc_count; count++)
816 int esdid = (int) src[count].sym_ptr_ptr;
820 src[count].sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr;
822 else if (esdid < ES_BASE) /* Section relative thing */
824 struct esdid *e = &EDATA (abfd, esdid - 1);
827 /** relocation relative to section which was
830 src[count].sym_ptr_ptr = e->section->symbol_ptr_ptr;
834 src[count].sym_ptr_ptr = symbols + esdid - ES_BASE;
840 for (count = 0; count < section->reloc_count; count++)
845 return section->reloc_count;
848 #define versados_close_and_cleanup _bfd_generic_close_and_cleanup
849 #define versados_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
850 #define versados_new_section_hook _bfd_generic_new_section_hook
852 #define versados_bfd_is_local_label_name bfd_generic_is_local_label_name
853 #define versados_get_lineno _bfd_nosymbols_get_lineno
854 #define versados_find_nearest_line _bfd_nosymbols_find_nearest_line
855 #define versados_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
856 #define versados_read_minisymbols _bfd_generic_read_minisymbols
857 #define versados_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
859 #define versados_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
861 #define versados_set_arch_mach bfd_default_set_arch_mach
863 #define versados_bfd_get_relocated_section_contents \
864 bfd_generic_get_relocated_section_contents
865 #define versados_bfd_relax_section bfd_generic_relax_section
866 #define versados_bfd_gc_sections bfd_generic_gc_sections
867 #define versados_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
868 #define versados_bfd_link_add_symbols _bfd_generic_link_add_symbols
869 #define versados_bfd_final_link _bfd_generic_final_link
870 #define versados_bfd_link_split_section _bfd_generic_link_split_section
872 const bfd_target versados_vec =
874 "versados", /* name */
875 bfd_target_versados_flavour,
876 BFD_ENDIAN_BIG, /* target byte order */
877 BFD_ENDIAN_BIG, /* target headers byte order */
878 (HAS_RELOC | EXEC_P | /* object flags */
879 HAS_LINENO | HAS_DEBUG |
880 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
881 (SEC_CODE | SEC_DATA | SEC_ROM | SEC_HAS_CONTENTS
882 | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
883 0, /* leading underscore */
884 ' ', /* ar_pad_char */
885 16, /* ar_max_namelen */
886 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
887 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
888 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */
889 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
890 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
891 bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
895 versados_object_p, /* bfd_check_format */
902 _bfd_generic_mkarchive,
905 { /* bfd_write_contents */
908 _bfd_write_archive_contents,
912 BFD_JUMP_TABLE_GENERIC (versados),
913 BFD_JUMP_TABLE_COPY (_bfd_generic),
914 BFD_JUMP_TABLE_CORE (_bfd_nocore),
915 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
916 BFD_JUMP_TABLE_SYMBOLS (versados),
917 BFD_JUMP_TABLE_RELOCS (versados),
918 BFD_JUMP_TABLE_WRITE (versados),
919 BFD_JUMP_TABLE_LINK (versados),
920 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),