--- /dev/null
+/* BFD back-end for VERSAdos-E objects.
+
+ Versados is a Motorola trademark.
+
+ Copyright 1995 Free Software Foundation, Inc.
+ Written by Steve Chamberlain of Cygnus Support <sac@cygnus.com>.
+
+ 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., 675 Mass Ave, Cambridge, MA 02139, 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 VEXTDEF '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 nsyms; /* number of symbols (valid end of pass1) */
+ int nsecsyms; /* number of sections */
+
+ 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;
+ 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 EST_SHRT_REL_SEC 1
+#define EST_STD_REL_SEC 2
+#define ESD_XDEF_IN_SEC 4
+#define ESD_XREF_SYM 7
+union ext_any
+ {
+ 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)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ 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_SYM:
+ {
+ int snum = VDATA (abfd)->nsyms++;
+ 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 EST_STD_REL_SEC:
+ case EST_SHRT_REL_SEC:
+ {
+ sec->_raw_size = get_4 (&ptr);
+ sec->flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_ALLOC;
+ }
+ break;
+ case ESD_XDEF_IN_SEC:
+ {
+ int snum = VDATA (abfd)->nsyms++;
+ 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, 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_bitfield, 0,
+ "+v16", true, 0x0000ffff, 0x0000ffff, false),
+ HOWTO (R_RELLONG, 0, 2, 32, false,
+ 0, complain_overflow_bitfield, 0,
+ "+v32", true, 0xffffffff, 0xffffffff, false),
+
+ HOWTO (R_RELWORD_NEG, 0, -1, 16, false,
+ 0, complain_overflow_bitfield, 0,
+ "-v16", true, 0x0000ffff, 0x0000ffff, false),
+ HOWTO (R_RELLONG_NEG, 0, -2, 32, false,
+ 0, complain_overflow_bitfield, 0,
+ "-v32", true, 0xffffffff, 0xffffffff, false),
+};
+
+
+static void
+process_otr (abfd, otr, pass)
+ bfd *abfd;
+ struct ext_otr *otr;
+ int pass;
+{
+ unsigned long shift;
+ long val;
+ 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);
+
+ unsigned char *contents = EDATA (abfd, otr->esdid - 1).contents;
+
+ int dst_idx = EDATA (abfd, otr->esdid - 1).pc;
+ for (shift = (1 << 31); srcp < endp; shift >>= 1)
+ {
+ if (bits & shift)
+ {
+ int flag = *srcp++;
+ int esdids = (flag >> 5) & 3;
+ int sizeinwords = ((flag >> 3) & 1) ? 2 : 1;
+ int offsetlen = flag & 7;
+
+ int j;
+ for (j = 0; j < esdids; j++)
+ {
+ int esdid = *srcp++;
+ /* don't process zero esdids */
+ 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);
+
+ }
+
+ }
+ }
+
+ if (offsetlen)
+ {
+ /* MSB is sign extended */
+ val = srcp[0] | ((srcp[0] & 0x80) ? ~0xff : 0);
+ for (j = 1; j < offsetlen; j++)
+ {
+ val = val << 8;
+ val |= srcp[j];
+ }
+ srcp += offsetlen;
+ }
+ else
+ val = 0;
+
+ /* Insert addend into stream */
+ if (pass == 2)
+ switch (sizeinwords)
+ {
+ case 2:
+ contents[dst_idx++] = val >> 24;
+ contents[dst_idx++] = val >> 16;
+ /* fall through */
+ case 1:
+ contents[dst_idx++] = val >> 8;
+ contents[dst_idx++] = val >> 0;
+ break;
+ }
+
+ }
+ else
+ {
+ 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;
+
+}
+
+static boolean
+versados_scan (abfd)
+ bfd *abfd;
+{
+ int loop = 1;
+ int i;
+ int j;
+
+ 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 VEXTDEF:
+ process_esd (abfd, &any.esd, 1);
+ break;
+ case VOTR:
+ process_otr (abfd, &any.otr, 1);
+ break;
+ }
+ }
+
+ /* Now allocate space for the relocs and sections */
+
+ for (i = 0; i < 16; i++)
+ {
+ struct esdid *esdid = &EDATA (abfd, i);
+ if (esdid->section)
+ {
+ esdid->section->relocation
+ = bfd_alloc (abfd, sizeof (arelent) * esdid->relocs);
+
+ esdid->contents
+ = bfd_alloc (abfd, esdid->section->_raw_size);
+
+ esdid->pc = 0;
+ 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 */
+ abfd->symcount++;
+ VDATA (abfd)->stringlen += strlen (esdid->section->name) + 1;
+ }
+ }
+ VDATA (abfd)->symbols = bfd_alloc (abfd,
+ sizeof (asymbol) * abfd->symcount);
+ VDATA (abfd)->strings = bfd_alloc (abfd, VDATA (abfd)->stringlen);
+ abfd->symcount = VDATA (abfd)->nsyms;
+
+ /* Actually fill in the section symbols */
+
+ for (j = 0, 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++;
+ }
+ }
+ abfd->symcount += j;
+ if (abfd->symcount)
+ abfd->flags |= HAS_SYMS;
+ VDATA (abfd)->nsecsyms = j;
+ VDATA (abfd)->nsyms = j;
+ 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))
+ return NULL;
+
+
+ bfd_read (&len, 1, 1, abfd);
+ if (bfd_read (&ext.type, 1, len, abfd) != len
+ || ext.type != '1')
+ {
+ 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 VEXTDEF:
+ 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,
+ count);
+
+ return true;
+}
+
+static boolean
+versados_set_section_contents (abfd, section, location, offset, bytes_to_do)
+ bfd *abfd;
+ sec_ptr section;
+ PTR location;
+ file_ptr offset;
+ bfd_size_type bytes_to_do;
+{
+ return false;
+}
+
+
+/*ARGSUSED */
+static int
+versados_sizeof_headers (abfd, exec)
+ bfd *abfd;
+ boolean exec;
+{
+ 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);
+ 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;
+ asymbol *symbol;
+ symbol_info *ret;
+{
+ bfd_symbol_info (symbol, ret);
+}
+
+/*ARGSUSED */
+void
+versados_print_symbol (ignore_abfd, afile, symbol, how)
+ bfd *ignore_abfd;
+ 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;
+ 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;
+{
+ 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 < ES_BASE) /* Section relative thing */
+ {
+ src[count].sym_ptr_ptr
+ = EDATA (abfd, esdid - 1).section->symbol_ptr_ptr;
+ }
+ else
+ {
+ src[count].sym_ptr_ptr
+ = symbols + esdid - 17 + VDATA (abfd)->nsecsyms;
+ }
+
+ }
+ }
+
+ 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 bfd_generic_is_local_label
+#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_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_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
+
+const bfd_target versados_vec =
+{
+ "versados", /* name */
+ bfd_target_versados_flavour,
+ true, /* target byte order */
+ true, /* 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 */
+ 1, /* minimum alignment */
+ 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),
+
+ (PTR) 0
+};
projects / binutils-gdb.git / commitdiff