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/* BFD back-end for VERSAdos-E objects. Copyright 1995, 96, 97, 98, 1999 Free Software Foundation, Inc. Written by Steve Chamberlain of Cygnus Support <sac@cygnus.com>. Versados is a Motorola trademark. This file is part of BFD, the Binary File Descriptor library. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* SUBSECTION VERSAdos-E relocateable object file format DESCRIPTION This module supports reading of VERSAdos relocateable object files. A VERSAdos file looks like contains o Indentification Record o External Symbol Definition Record o Object Text Recrod o End Record */ #include "bfd.h" #include "sysdep.h" #include "libbfd.h" #include "libiberty.h" static boolean versados_mkobject PARAMS ((bfd *)); static boolean versados_scan PARAMS ((bfd *)); static const bfd_target *versados_object_p PARAMS ((bfd *)); #define VHEADER '1' #define VESTDEF '2' #define VOTR '3' #define VEND '4' #define ES_BASE 17 /* first symbol has esdid 17 */ /* Per file target dependent information */ /* one for each section */ struct esdid { asection *section; /* ptr to bfd version */ unsigned char *contents; /* used to build image */ int pc; int relocs; /* reloc count, valid end of pass 1 */ int donerel; /* have relocs been translated */ }; typedef struct versados_data_struct { int es_done; /* count of symbol index, starts at ES_BASE */ asymbol *symbols; /* pointer to local symbols */ char *strings; /* strings of all the above */ int stringlen; /* len of string table (valid end of pass1) */ int nsecsyms; /* number of sections */ int ndefs; /* number of exported symbols (they dont get esdids) */ int nrefs; /* number of imported symbols (valid end of pass1) */ int ref_idx; /* current processed value of the above */ int def_idx; int pass_2_done; struct esdid e[16]; /* per section info */ int alert; /* to see if we're trampling */ asymbol *rest[256 - 16]; /* per symbol info */ } tdata_type; #define VDATA(abfd) (abfd->tdata.versados_data) #define EDATA(abfd, n) (abfd->tdata.versados_data->e[n]) #define RDATA(abfd, n) (abfd->tdata.versados_data->rest[n]) struct ext_otr { unsigned char size; char type; unsigned char map[4]; unsigned char esdid; unsigned char data[200]; }; struct ext_vheader { unsigned char size; char type; /* record type */ char name[10]; /* module name */ char rev; /* module rev number */ char lang; char vol[4]; char user[2]; char cat[8]; char fname[8]; char ext[2]; char time[3]; char date[3]; char rest[211]; }; struct ext_esd { unsigned char size; char type; unsigned char esd_entries[1]; }; #define ESD_ABS 0 #define ESD_COMMON 1 #define ESD_STD_REL_SEC 2 #define ESD_SHRT_REL_SEC 3 #define ESD_XDEF_IN_SEC 4 #define ESD_XREF_SYM 7 #define ESD_XREF_SEC 6 #define ESD_XDEF_IN_ABS 5 union ext_any { unsigned char size; struct ext_vheader header; struct ext_esd esd; struct ext_otr otr; }; /* Initialize by filling in the hex conversion array. */ /* Set up the tdata information. */ static boolean versados_mkobject (abfd) bfd *abfd; { if (abfd->tdata.versados_data == NULL) { tdata_type *tdata = (tdata_type *) bfd_alloc (abfd, sizeof (tdata_type)); if (tdata == NULL) return false; abfd->tdata.versados_data = tdata; tdata->symbols = NULL; VDATA (abfd)->alert = 0x12345678; } bfd_default_set_arch_mach (abfd, bfd_arch_m68k, 0); return true; } /* Report a problem in an S record file. FIXME: This probably should not call fprintf, but we really do need some mechanism for printing error messages. */ static asymbol * versados_new_symbol (abfd, snum, name, val, sec) bfd *abfd; int snum; const char *name; bfd_vma val; asection *sec; { asymbol *n = VDATA (abfd)->symbols + snum; n->name = name; n->value = val; n->section = sec; n->the_bfd = abfd; n->flags = 0; return n; } static int get_record (abfd, ptr) bfd *abfd; union ext_any *ptr; { bfd_read (&ptr->size, 1, 1, abfd); if (bfd_read ((char *) ptr + 1, 1, ptr->size, abfd) != ptr->size) return 0; return 1; } int get_4 (pp) unsigned char **pp; { unsigned char *p = *pp; *pp += 4; return (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | (p[3] << 0); } void get_10 (pp, name) unsigned char **pp; char *name; { char *p = (char *) *pp; int len = 10; *pp += len; while (*p != ' ' && len) { *name++ = *p++; len--; } *name = 0; } static char * new_symbol_string (abfd, name) bfd *abfd; char *name; { char *n = VDATA (abfd)->strings; strcpy (VDATA (abfd)->strings, name); VDATA (abfd)->strings += strlen (VDATA (abfd)->strings) + 1; return n; } static void process_esd (abfd, esd, pass) bfd *abfd; struct ext_esd *esd; int pass; { /* Read through the ext def for the est entries */ int togo = esd->size - 2; bfd_vma size; bfd_vma start; asection *sec; char name[11]; unsigned char *ptr = esd->esd_entries; unsigned char *end = ptr + togo; while (ptr < end) { int scn = *ptr & 0xf; int typ = (*ptr >> 4) & 0xf; /* Declare this section */ sprintf (name, "%d", scn); sec = bfd_make_section_old_way (abfd, strdup (name)); sec->target_index = scn; EDATA (abfd, scn).section = sec; ptr++; switch (typ) { default: abort (); case ESD_XREF_SEC: case ESD_XREF_SYM: { int snum = VDATA (abfd)->ref_idx++; get_10 (&ptr, name); if (pass == 1) { VDATA (abfd)->stringlen += strlen (name) + 1; } else { int esidx; asymbol *s; char *n = new_symbol_string (abfd, name); s = versados_new_symbol (abfd, snum, n, 0, &bfd_und_section, scn); esidx = VDATA (abfd)->es_done++; RDATA (abfd, esidx - ES_BASE) = s; } } break; case ESD_ABS: size = get_4 (&ptr); start = get_4 (&ptr); break; case ESD_STD_REL_SEC: case ESD_SHRT_REL_SEC: { sec->_raw_size = get_4 (&ptr); sec->flags |= SEC_ALLOC; } break; case ESD_XDEF_IN_ABS: sec = (asection *) & bfd_abs_section; case ESD_XDEF_IN_SEC: { int snum = VDATA (abfd)->def_idx++; long val; get_10 (&ptr, name); val = get_4 (&ptr); if (pass == 1) { /* Just remember the symbol */ VDATA (abfd)->stringlen += strlen (name) + 1; } else { asymbol *s; char *n = new_symbol_string (abfd, name); s = versados_new_symbol (abfd, snum + VDATA (abfd)->nrefs, n, val, sec, scn); s->flags |= BSF_GLOBAL; } } break; } } } #define R_RELWORD 1 #define R_RELLONG 2 #define R_RELWORD_NEG 3 #define R_RELLONG_NEG 4 reloc_howto_type versados_howto_table[] = { HOWTO (R_RELWORD, 0, 1, 16, false, 0, complain_overflow_dont, 0, "+v16", true, 0x0000ffff, 0x0000ffff, false), HOWTO (R_RELLONG, 0, 2, 32, false, 0, complain_overflow_dont, 0, "+v32", true, 0xffffffff, 0xffffffff, false), HOWTO (R_RELWORD_NEG, 0, -1, 16, false, 0, complain_overflow_dont, 0, "-v16", true, 0x0000ffff, 0x0000ffff, false), HOWTO (R_RELLONG_NEG, 0, -2, 32, false, 0, complain_overflow_dont, 0, "-v32", true, 0xffffffff, 0xffffffff, false), }; static int get_offset (len, ptr) int len; unsigned char *ptr; { int val = 0; if (len) { int i; val = *ptr++; if (val & 0x80) val |= ~0xff; for (i = 1; i < len; i++) val = (val << 8) | *ptr++; } return val; } static void process_otr (abfd, otr, pass) bfd *abfd; struct ext_otr *otr; int pass; { unsigned long shift; unsigned char *srcp = otr->data; unsigned char *endp = (unsigned char *) otr + otr->size; unsigned int bits = (otr->map[0] << 24) | (otr->map[1] << 16) | (otr->map[2] << 8) | (otr->map[3] << 0); struct esdid *esdid = &EDATA (abfd, otr->esdid - 1); unsigned char *contents = esdid->contents; int need_contents = 0; unsigned int dst_idx = esdid->pc; for (shift = (1 << 31); shift && srcp < endp; shift >>= 1) { if (bits & shift) { int flag = *srcp++; int esdids = (flag >> 5) & 0x7; int sizeinwords = ((flag >> 3) & 1) ? 2 : 1; int offsetlen = flag & 0x7; int j; if (esdids == 0) { /* A zero esdid means the new pc is the offset given */ dst_idx += get_offset (offsetlen, srcp); srcp += offsetlen; } else { int val = get_offset (offsetlen, srcp + esdids); if (pass == 1) need_contents = 1; else for (j = 0; j < sizeinwords * 2; j++) { contents[dst_idx + (sizeinwords * 2) - j - 1] = val; val >>= 8; } for (j = 0; j < esdids; j++) { int esdid = *srcp++; if (esdid) { int rn = EDATA (abfd, otr->esdid - 1).relocs++; if (pass == 1) { /* this is the first pass over the data, just remember that we need a reloc */ } else { arelent *n = EDATA (abfd, otr->esdid - 1).section->relocation + rn; n->address = dst_idx; n->sym_ptr_ptr = (asymbol **) esdid; n->addend = 0; n->howto = versados_howto_table + ((j & 1) * 2) + (sizeinwords - 1); } } } srcp += offsetlen; dst_idx += sizeinwords * 2; } } else { need_contents = 1; if (dst_idx < esdid->section->_raw_size) if (pass == 2) { /* absolute code, comes in 16 bit lumps */ contents[dst_idx] = srcp[0]; contents[dst_idx + 1] = srcp[1]; } dst_idx += 2; srcp += 2; } } EDATA (abfd, otr->esdid - 1).pc = dst_idx; if (!contents && need_contents) esdid->contents = (unsigned char *) bfd_alloc (abfd, esdid->section->_raw_size); } static boolean versados_scan (abfd) bfd *abfd; { int loop = 1; int i; int j; int nsecs = 0; VDATA (abfd)->nrefs = 0; VDATA (abfd)->ndefs = 0; VDATA (abfd)->ref_idx = 0; VDATA (abfd)->def_idx = 0; while (loop) { union ext_any any; if (!get_record (abfd, &any)) return true; switch (any.header.type) { case VHEADER: break; case VEND: loop = 0; break; case VESTDEF: process_esd (abfd, &any.esd, 1); break; case VOTR: process_otr (abfd, &any.otr, 1); break; } } /* Now allocate space for the relocs and sections */ VDATA (abfd)->nrefs = VDATA (abfd)->ref_idx; VDATA (abfd)->ndefs = VDATA (abfd)->def_idx; VDATA (abfd)->ref_idx = 0; VDATA (abfd)->def_idx = 0; abfd->symcount = VDATA (abfd)->nrefs + VDATA (abfd)->ndefs; for (i = 0; i < 16; i++) { struct esdid *esdid = &EDATA (abfd, i); if (esdid->section) { esdid->section->relocation = (arelent *) bfd_alloc (abfd, sizeof (arelent) * esdid->relocs); esdid->pc = 0; if (esdid->contents) esdid->section->flags |= SEC_HAS_CONTENTS | SEC_LOAD; esdid->section->reloc_count = esdid->relocs; if (esdid->relocs) esdid->section->flags |= SEC_RELOC; esdid->relocs = 0; /* Add an entry into the symbol table for it */ nsecs++; VDATA (abfd)->stringlen += strlen (esdid->section->name) + 1; } } abfd->symcount += nsecs; VDATA (abfd)->symbols = (asymbol *) bfd_alloc (abfd, sizeof (asymbol) * (abfd->symcount)); VDATA (abfd)->strings = bfd_alloc (abfd, VDATA (abfd)->stringlen); if ((VDATA (abfd)->symbols == NULL && abfd->symcount > 0) || (VDATA (abfd)->strings == NULL && VDATA (abfd)->stringlen > 0)) return false; /* Actually fill in the section symbols, we stick them at the end of the table */ for (j = VDATA (abfd)->nrefs + VDATA (abfd)->ndefs, i = 0; i < 16; i++) { struct esdid *esdid = &EDATA (abfd, i); asection *sec = esdid->section; if (sec) { asymbol *s = VDATA (abfd)->symbols + j; s->name = new_symbol_string (abfd, sec->name); s->section = sec; s->flags = BSF_LOCAL; s->value = 0; s->the_bfd = abfd; j++; } } if (abfd->symcount) abfd->flags |= HAS_SYMS; /* Set this to nsecs - since we've already planted the section symbols */ VDATA (abfd)->nsecsyms = nsecs; VDATA (abfd)->ref_idx = 0; return 1; } /* Check whether an existing file is a versados file. */ static const bfd_target * versados_object_p (abfd) bfd *abfd; { struct ext_vheader ext; unsigned char len; if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0) return NULL; if (bfd_read (&len, 1, 1, abfd) != 1) { if (bfd_get_error () != bfd_error_system_call) bfd_set_error (bfd_error_wrong_format); return NULL; } if (bfd_read (&ext.type, 1, len, abfd) != len) { if (bfd_get_error () != bfd_error_system_call) bfd_set_error (bfd_error_wrong_format); return NULL; } /* We guess that the language field will never be larger than 10. In sample files, it is always either 0 or 1. Checking for this prevents confusion with Intel Hex files. */ if (ext.type != VHEADER || ext.lang > 10) { bfd_set_error (bfd_error_wrong_format); return NULL; } /* OK, looks like a record, build the tdata and read in. */ if (!versados_mkobject (abfd) || !versados_scan (abfd)) return NULL; return abfd->xvec; } static boolean versados_pass_2 (abfd) bfd *abfd; { union ext_any any; if (VDATA (abfd)->pass_2_done) return 1; if (bfd_seek (abfd, 0, SEEK_SET) != 0) return 0; VDATA (abfd)->es_done = ES_BASE; /* read records till we get to where we want to be */ while (1) { get_record (abfd, &any); switch (any.header.type) { case VEND: VDATA (abfd)->pass_2_done = 1; return 1; case VESTDEF: process_esd (abfd, &any.esd, 2); break; case VOTR: process_otr (abfd, &any.otr, 2); break; } } } static boolean versados_get_section_contents (abfd, section, location, offset, count) bfd *abfd; asection *section; PTR location; file_ptr offset; bfd_size_type count; { if (!versados_pass_2 (abfd)) return false; memcpy (location, EDATA (abfd, section->target_index).contents + offset, (size_t) count); return true; } #define versados_get_section_contents_in_window \ _bfd_generic_get_section_contents_in_window static boolean versados_set_section_contents (abfd, section, location, offset, bytes_to_do) bfd *abfd ATTRIBUTE_UNUSED; sec_ptr section ATTRIBUTE_UNUSED; PTR location ATTRIBUTE_UNUSED; file_ptr offset ATTRIBUTE_UNUSED; bfd_size_type bytes_to_do ATTRIBUTE_UNUSED; { return false; } /*ARGSUSED */ static int versados_sizeof_headers (abfd, exec) bfd *abfd ATTRIBUTE_UNUSED; boolean exec ATTRIBUTE_UNUSED; { return 0; } static asymbol * versados_make_empty_symbol (abfd) bfd *abfd; { asymbol *new = (asymbol *) bfd_zalloc (abfd, sizeof (asymbol)); if (new) new->the_bfd = abfd; return new; } /* Return the amount of memory needed to read the symbol table. */ static long versados_get_symtab_upper_bound (abfd) bfd *abfd; { return (bfd_get_symcount (abfd) + 1) * sizeof (asymbol *); } /* Return the symbol table. */ static long versados_get_symtab (abfd, alocation) bfd *abfd; asymbol **alocation; { unsigned int symcount = bfd_get_symcount (abfd); unsigned int i; asymbol *s; versados_pass_2 (abfd); for (i = 0, s = VDATA (abfd)->symbols; i < symcount; s++, i++) { *alocation++ = s; } *alocation = NULL; return symcount; } /*ARGSUSED */ void versados_get_symbol_info (ignore_abfd, symbol, ret) bfd *ignore_abfd ATTRIBUTE_UNUSED; asymbol *symbol; symbol_info *ret; { bfd_symbol_info (symbol, ret); } /*ARGSUSED */ void versados_print_symbol (ignore_abfd, afile, symbol, how) bfd *ignore_abfd ATTRIBUTE_UNUSED; PTR afile; asymbol *symbol; bfd_print_symbol_type how; { FILE *file = (FILE *) afile; switch (how) { case bfd_print_symbol_name: fprintf (file, "%s", symbol->name); break; default: bfd_print_symbol_vandf ((PTR) file, symbol); fprintf (file, " %-5s %s", symbol->section->name, symbol->name); } } long versados_get_reloc_upper_bound (abfd, asect) bfd *abfd ATTRIBUTE_UNUSED; sec_ptr asect; { return (asect->reloc_count + 1) * sizeof (arelent *); } long versados_canonicalize_reloc (abfd, section, relptr, symbols) bfd *abfd; sec_ptr section; arelent **relptr; asymbol **symbols; { unsigned int count; arelent *src; versados_pass_2 (abfd); src = section->relocation; if (!EDATA (abfd, section->target_index).donerel) { EDATA (abfd, section->target_index).donerel = 1; /* translate from indexes to symptr ptrs */ for (count = 0; count < section->reloc_count; count++) { int esdid = (int) src[count].sym_ptr_ptr; if (esdid == 0) { src[count].sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr; } else if (esdid < ES_BASE) /* Section relative thing */ { struct esdid *e = &EDATA (abfd, esdid - 1); if (!section) { /** relocation relative to section which was never declared ! */ } src[count].sym_ptr_ptr = e->section->symbol_ptr_ptr; } else { src[count].sym_ptr_ptr = symbols + esdid - ES_BASE; } } } for (count = 0; count < section->reloc_count; count++) { *relptr++ = src++; } *relptr = 0; return section->reloc_count; } #define versados_close_and_cleanup _bfd_generic_close_and_cleanup #define versados_bfd_free_cached_info _bfd_generic_bfd_free_cached_info #define versados_new_section_hook _bfd_generic_new_section_hook #define versados_bfd_is_local_label_name bfd_generic_is_local_label_name #define versados_get_lineno _bfd_nosymbols_get_lineno #define versados_find_nearest_line _bfd_nosymbols_find_nearest_line #define versados_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol #define versados_read_minisymbols _bfd_generic_read_minisymbols #define versados_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol #define versados_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup #define versados_set_arch_mach bfd_default_set_arch_mach #define versados_bfd_get_relocated_section_contents \ bfd_generic_get_relocated_section_contents #define versados_bfd_relax_section bfd_generic_relax_section #define versados_bfd_gc_sections bfd_generic_gc_sections #define versados_bfd_link_hash_table_create _bfd_generic_link_hash_table_create #define versados_bfd_link_add_symbols _bfd_generic_link_add_symbols #define versados_bfd_final_link _bfd_generic_final_link #define versados_bfd_link_split_section _bfd_generic_link_split_section const bfd_target versados_vec = { "versados", /* name */ bfd_target_versados_flavour, BFD_ENDIAN_BIG, /* target byte order */ BFD_ENDIAN_BIG, /* target headers byte order */ (HAS_RELOC | EXEC_P | /* object flags */ HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), (SEC_CODE | SEC_DATA | SEC_ROM | SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ 0, /* leading underscore */ ' ', /* ar_pad_char */ 16, /* ar_max_namelen */ bfd_getb64, bfd_getb_signed_64, bfd_putb64, bfd_getb32, bfd_getb_signed_32, bfd_putb32, bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */ bfd_getb64, bfd_getb_signed_64, bfd_putb64, bfd_getb32, bfd_getb_signed_32, bfd_putb32, bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */ { _bfd_dummy_target, versados_object_p, /* bfd_check_format */ _bfd_dummy_target, _bfd_dummy_target, }, { bfd_false, versados_mkobject, _bfd_generic_mkarchive, bfd_false, }, { /* bfd_write_contents */ bfd_false, bfd_false, _bfd_write_archive_contents, bfd_false, }, BFD_JUMP_TABLE_GENERIC (versados), BFD_JUMP_TABLE_COPY (_bfd_generic), BFD_JUMP_TABLE_CORE (_bfd_nocore), BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), BFD_JUMP_TABLE_SYMBOLS (versados), BFD_JUMP_TABLE_RELOCS (versados), BFD_JUMP_TABLE_WRITE (versados), BFD_JUMP_TABLE_LINK (versados), BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), NULL, (PTR) 0 };
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