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binutils-gdb/bfd/versados.c

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/* BFD back-end for VERSAdos-E objects.
Copyright 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
2006, 2007 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
/*
SUBSECTION
VERSAdos-E relocatable object file format
DESCRIPTION
This module supports reading of VERSAdos relocatable
object files.
A VERSAdos file looks like contains
o Identification Record
o External Symbol Definition Record
o Object Text Record
o End Record. */
#include "sysdep.h"
#include "bfd.h"
#include "libbfd.h"
#include "libiberty.h"
#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_XDEF_IN_ABS 5
#define ESD_XREF_SEC 6
#define ESD_XREF_SYM 7
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 bfd_boolean
versados_mkobject (bfd *abfd)
{
if (abfd->tdata.versados_data == NULL)
{
bfd_size_type amt = sizeof (tdata_type);
tdata_type *tdata = bfd_alloc (abfd, amt);
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 (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 (bfd *abfd, union ext_any *ptr)
{
if (bfd_bread (&ptr->size, (bfd_size_type) 1, abfd) != 1
|| (bfd_bread ((char *) ptr + 1, (bfd_size_type) ptr->size, abfd)
!= ptr->size))
return 0;
return 1;
}
static int
get_4 (unsigned char **pp)
{
unsigned char *p = *pp;
*pp += 4;
return (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | (p[3] << 0);
}
static void
get_10 (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 (bfd *abfd, const 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 (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, (bfd_vma) 0,
bfd_und_section_ptr);
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->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++;
bfd_vma 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);
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 (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 (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 = ((unsigned long) 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 **) (size_t) 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->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)
{
bfd_size_type size = esdid->section->size;
esdid->contents = bfd_alloc (abfd, size);
}
}
static bfd_boolean
versados_scan (bfd *abfd)
{
int loop = 1;
int i;
int j;
int nsecs = 0;
bfd_size_type amt;
VDATA (abfd)->stringlen = 0;
VDATA (abfd)->nrefs = 0;
VDATA (abfd)->ndefs = 0;
VDATA (abfd)->ref_idx = 0;
VDATA (abfd)->def_idx = 0;
VDATA (abfd)->pass_2_done = 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)
{
amt = (bfd_size_type) esdid->relocs * sizeof (arelent);
esdid->section->relocation = bfd_alloc (abfd, amt);
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;
amt = abfd->symcount;
amt *= sizeof (asymbol);
VDATA (abfd)->symbols = bfd_alloc (abfd, amt);
amt = VDATA (abfd)->stringlen;
VDATA (abfd)->strings = bfd_alloc (abfd, amt);
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 (bfd *abfd)
{
struct ext_vheader ext;
unsigned char len;
tdata_type *tdata_save;
if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
return NULL;
if (bfd_bread (&len, (bfd_size_type) 1, abfd) != 1)
{
if (bfd_get_error () != bfd_error_system_call)
bfd_set_error (bfd_error_wrong_format);
return NULL;
}
if (bfd_bread (&ext.type, (bfd_size_type) 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. */
tdata_save = abfd->tdata.versados_data;
if (!versados_mkobject (abfd) || !versados_scan (abfd))
{
abfd->tdata.versados_data = tdata_save;
return NULL;
}
return abfd->xvec;
}
static bfd_boolean
versados_pass_2 (bfd *abfd)
{
union ext_any any;
if (VDATA (abfd)->pass_2_done)
return 1;
if (bfd_seek (abfd, (file_ptr) 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 bfd_boolean
versados_get_section_contents (bfd *abfd,
asection *section,
void * 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 bfd_boolean
versados_set_section_contents (bfd *abfd ATTRIBUTE_UNUSED,
sec_ptr section ATTRIBUTE_UNUSED,
const void * location ATTRIBUTE_UNUSED,
file_ptr offset ATTRIBUTE_UNUSED,
bfd_size_type bytes_to_do ATTRIBUTE_UNUSED)
{
return FALSE;
}
static int
versados_sizeof_headers (bfd *abfd ATTRIBUTE_UNUSED,
struct bfd_link_info *info ATTRIBUTE_UNUSED)
{
return 0;
}
/* Return the amount of memory needed to read the symbol table. */
static long
versados_get_symtab_upper_bound (bfd *abfd)
{
return (bfd_get_symcount (abfd) + 1) * sizeof (asymbol *);
}
/* Return the symbol table. */
static long
versados_canonicalize_symtab (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;
}
static void
versados_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
asymbol *symbol,
symbol_info *ret)
{
bfd_symbol_info (symbol, ret);
}
static void
versados_print_symbol (bfd *abfd,
void * 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 (abfd, (void *) file, symbol);
fprintf (file, " %-5s %s",
symbol->section->name,
symbol->name);
}
}
static long
versados_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
sec_ptr asect)
{
return (asect->reloc_count + 1) * sizeof (arelent *);
}
static long
versados_canonicalize_reloc (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) (size_t) 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);
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_target_special_symbol ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false)
#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_find_inliner_info _bfd_nosymbols_find_inliner_info
#define versados_make_empty_symbol _bfd_generic_make_empty_symbol
#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_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_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_merge_sections bfd_generic_merge_sections
#define versados_bfd_is_group_section bfd_generic_is_group_section
#define versados_bfd_discard_group bfd_generic_discard_group
#define versados_section_already_linked _bfd_generic_section_already_linked
#define versados_bfd_define_common_symbol bfd_generic_define_common_symbol
#define versados_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
#define versados_bfd_link_hash_table_free _bfd_generic_link_hash_table_free
#define versados_bfd_link_add_symbols _bfd_generic_link_add_symbols
#define versados_bfd_link_just_syms _bfd_generic_link_just_syms
#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, /* Headers. */
{
_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,
NULL
};
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