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|
/* evax-misc.c -- Miscellaneous functions for ALPHA EVAX (openVMS/Alpha) files.
Copyright 1996, 1997 Free Software Foundation, Inc.
Written by Klaus K"ampf (kkaempf@progis.de)
of proGIS Softwareentwicklung, Aachen, Germany
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. */
#if __STDC__
#include <stdarg.h>
#endif
#include <stdio.h>
#include "bfd.h"
#include "sysdep.h"
#include "bfdlink.h"
#include "libbfd.h"
#include "evax.h"
/*-----------------------------------------------------------------------------*/
#if EVAX_DEBUG
/* debug functions */
/* debug function for all evax extensions
evaluates environment variable EVAX_DEBUG for a
numerical value on the first call
all error levels below this value are printed
levels:
1 toplevel bfd calls (functions from the bfd vector)
2 functions called by bfd calls
...
9 almost everything
level is also identation level. Indentation is performed
if level > 0
*/
#if __STDC__
void
_bfd_evax_debug (int level, char *format, ...)
{
static int min_level = -1;
static FILE *output = NULL;
char *eptr;
va_list args;
int abslvl = (level > 0)?level:-level;
if (min_level == -1)
{
if ((eptr = getenv("EVAX_DEBUG")) != NULL)
{
min_level = atoi(eptr);
output = stderr;
}
else
min_level = 0;
}
if (output == NULL)
return;
if (abslvl > min_level)
return;
while(--level>0)
fprintf(output, " ");
va_start(args, format);
vfprintf(output, format, args);
fflush(output);
va_end(args);
return;
}
#else /* not __STDC__ */
void
_bfd_evax_debug (level, format, a1, a2, a3, a4, a5, a6)
int level;
char *format;
long a1; long a2; long a3;
long a4; long a5; long a6;
{
static int min_level = -1;
static FILE *output = NULL;
char *eptr;
if (min_level == -1)
{
if ((eptr = getenv("EVAX_DEBUG")) != NULL)
{
min_level = atoi(eptr);
output = stderr;
}
else
min_level = 0;
}
if (output == NULL)
return;
if (level > min_level)
return;
while(--level>0)
fprintf(output, " ");
fprintf(output, format, a1, a2, a3, a4, a5, a6);
fflush(output);
return;
}
#endif /* __STDC__ */
/* a debug function
hex dump 'size' bytes starting at 'ptr' */
void
_bfd_hexdump (level, ptr, size, offset)
int level;
unsigned char *ptr;
int size;
int offset;
{
unsigned char *lptr = ptr;
int count = 0;
long start = offset;
while (size-- > 0)
{
if ((count%16) == 0)
evax_debug (level, "%08lx:", start);
evax_debug (-level, " %02x", *ptr++);
count++;
start++;
if (size == 0)
{
while ((count%16) != 0)
{
evax_debug (-level, " ");
count++;
}
}
if ((count%16) == 0)
{
evax_debug (-level, " ");
while (lptr < ptr)
{
evax_debug (-level, "%c", (*lptr < 32)?'.':*lptr);
lptr++;
}
evax_debug (-level, "\n");
}
}
if ((count%16) != 0)
evax_debug (-level, "\n");
return;
}
#endif
/* hash functions
These are needed when reading an object file. */
/* allocate new evax_hash_entry
keep the symbol name and a pointer to the bfd symbol in the table */
struct bfd_hash_entry *
_bfd_evax_hash_newfunc (entry, table, string)
struct bfd_hash_entry *entry;
struct bfd_hash_table *table;
const char *string;
{
evax_symbol_entry *ret = (evax_symbol_entry *)entry;
#if EVAX_DEBUG
evax_debug (5, "_bfd_evax_hash_newfunc(%p, %p, %s)\n", entry, table, string);
#endif
if (ret == (evax_symbol_entry *)NULL)
ret = ((evax_symbol_entry *) bfd_hash_allocate (table, sizeof (evax_symbol_entry)));
if (ret == (evax_symbol_entry *)NULL)
{
bfd_set_error (bfd_error_no_memory);
return (struct bfd_hash_entry *)NULL;
}
ret = (evax_symbol_entry *) bfd_hash_newfunc ((struct bfd_hash_entry *)ret, table, string);
ret->symbol = (asymbol *)NULL;
return (struct bfd_hash_entry *)ret;
}
/* object file input functions */
/* Return type and length from record header (buf) */
void
_bfd_evax_get_header_values (abfd, buf, type, length)
bfd *abfd;
unsigned char *buf;
int *type;
int *length;
{
if (type != 0)
*type = bfd_getl16 (buf);
buf += 2;
if (length != 0)
*length = bfd_getl16 (buf);
return;
}
/* Get next record from object file to evax_buf
set PRIV(buf_size) and return it
this is a little tricky since it should be portable.
the openVMS/AXP object file has 'variable length' which means that
read() returns data in chunks of (hopefully) correct and expected
size. The linker (and other tools on vms) depend on that. Unix doesn't
know about 'formatted' files, so reading and writing such an object
file in a unix environment is not trivial.
With the tool 'file' (available on all vms ftp sites), one
can view and change the attributes of a file. Changing from
'variable length' to 'fixed length, 512 bytes' reveals the
record length at the first 2 bytes of every record. The same
happens during the transfer of object files from vms to unix,
at least with ucx, dec's implementation of tcp/ip.
The EVAX format repeats the length at bytes 2 & 3 of every record.
On the first call (file_format == FF_UNKNOWN) we check if
the first and the third byte pair (!) of the record match.
If they do it's an object file in an unix environment or with
wrong attributes (FF_FOREIGN), else we should be in a vms
environment where read() returns the record size (FF_NATIVE).
reading is always done in 2 steps.
first just the record header is read and the length extracted
by get_header_values
then the read buffer is adjusted and the remaining bytes are
read in.
all file i/o is always done on even file positions */
int
_bfd_evax_get_record (abfd)
bfd *abfd;
{
int test_len, test_start, remaining;
unsigned char *evax_buf;
#if EVAX_DEBUG
evax_debug (8, "_bfd_evax_get_record\n");
#endif
/* minimum is 6 bytes
(2 bytes length, 2 bytes record id, 2 bytes length repeated) */
if (PRIV(buf_size) == 0)
{
PRIV(evax_buf) = (unsigned char *) malloc (6);
#if EVAX_DEBUG
evax_debug (9, "PRIV(evax_buf) %p\n", PRIV(evax_buf));
#endif
}
evax_buf = PRIV(evax_buf);
if (evax_buf == 0)
{
#if EVAX_DEBUG
evax_debug (9, "can't alloc evax_buf\n");
#endif
bfd_set_error (bfd_error_no_memory);
return -1;
}
switch (PRIV(file_format))
{
case FF_UNKNOWN:
case FF_FOREIGN:
test_len = 6; /* probe 6 bytes */
test_start = 2; /* where the record starts */
break;
case FF_NATIVE:
test_len = 4;
test_start = 0;
break;
}
/* skip odd alignment byte */
#if 0
if (PRIV(file_format) == FF_FOREIGN)
{
#endif
if (bfd_tell (abfd) & 1)
{
#if EVAX_DEBUG
evax_debug (10, "skip odd\n");
#endif
if (bfd_read (PRIV(evax_buf), 1, 1, abfd) != 1)
{
#if EVAX_DEBUG
evax_debug (9, "skip odd failed\n");
#endif
bfd_set_error (bfd_error_file_truncated);
return 0;
}
}
#if 0
}
#endif
/* read the record header */
if (bfd_read (PRIV(evax_buf), 1, test_len, abfd) != test_len)
{
#if EVAX_DEBUG
evax_debug (9, "can't bfd_read test %d bytes\n", test_len);
#endif
bfd_set_error (bfd_error_file_truncated);
return 0;
}
/* check file format on first call */
if (PRIV(file_format) == FF_UNKNOWN)
{ /* record length repeats ? */
if ( (evax_buf[0] == evax_buf[4])
&& (evax_buf[1] == evax_buf[5]))
{
PRIV(file_format) = FF_FOREIGN; /* Y: foreign environment */
test_start = 2;
}
else
{
PRIV(file_format) = FF_NATIVE; /* N: native environment */
test_start = 0;
}
#if EVAX_DEBUG
evax_debug (10, "File format is %s\n", (PRIV(file_format) == FF_FOREIGN)?"foreign":"native");
#endif
}
/* extract evax record length */
_bfd_evax_get_header_values (abfd, evax_buf+test_start, NULL,
&PRIV(rec_length));
if (PRIV(rec_length) <= 0)
{
bfd_set_error (bfd_error_file_truncated);
return 0;
}
/* that's what the linker manual says */
if (PRIV(rec_length) > EOBJ_S_C_MAXRECSIZ)
{
bfd_set_error (bfd_error_file_truncated);
return 0;
}
/* adjust the buffer */
if (PRIV(rec_length) > PRIV(buf_size))
{
PRIV(evax_buf) = (unsigned char *) realloc (evax_buf, PRIV(rec_length));
#if EVAX_DEBUG
evax_debug (3, "adjusted the buffer (%p) from %d to %d\n", PRIV(evax_buf), PRIV(buf_size), PRIV(rec_length));
#endif
evax_buf = PRIV(evax_buf);
if (evax_buf == 0)
{
#if EVAX_DEBUG
evax_debug (9, "can't realloc evax_buf to %d bytes\n", PRIV(rec_length));
#endif
bfd_set_error (bfd_error_no_memory);
return -1;
}
PRIV(buf_size) = PRIV(rec_length);
}
/* read the remaining record */
remaining = PRIV(rec_length) - test_len + test_start;
if (bfd_read (evax_buf + test_len, 1, remaining, abfd) != remaining)
{
#if EVAX_DEBUG
evax_debug (9, "can't bfd_read remaining %d bytes\n", remaining);
#endif
bfd_set_error (bfd_error_file_truncated);
return 0;
}
PRIV(evax_rec) = evax_buf + test_start;
return PRIV(rec_length);
}
/* get next EVAX record from file
update evax_rec and rec_length to new (remaining) values */
int
_bfd_evax_next_record (abfd)
bfd *abfd;
{
#if EVAX_DEBUG
evax_debug (8, "_bfd_evax_next_record (len %d, size %d)\n",
PRIV(rec_length), PRIV(rec_size));
#endif
if (PRIV(rec_length) > 0)
{
PRIV(evax_rec) += PRIV(rec_size);
}
else
{
if (_bfd_evax_get_record (abfd) <= 0)
return -1;
}
_bfd_evax_get_header_values (abfd, PRIV(evax_rec), &PRIV(rec_type),
&PRIV(rec_size));
PRIV(rec_length) -= PRIV(rec_size);
#if EVAX_DEBUG
evax_debug (8, "_bfd_evax_next_record: rec %p, size %d, length %d, type %d\n",
PRIV(evax_rec), PRIV(rec_size), PRIV(rec_length),
PRIV(rec_type));
#endif
return PRIV(rec_type);
}
/* Copy sized string (string with fixed length) to new allocated area
size is string length (size of record) */
char *
_bfd_evax_save_sized_string (str, size)
char *str;
int size;
{
char *newstr = bfd_malloc (size + 1);
if (newstr == NULL)
return 0;
strncpy (newstr, str, size);
newstr[size] = 0;
return newstr;
}
/* Copy counted string (string with length at first byte) to new allocated area
ptr points to length byte on entry */
char *
_bfd_evax_save_counted_string (ptr)
char *ptr;
{
int len = *ptr++;
return _bfd_evax_save_sized_string (ptr, len);
}
/* stack routines for EVAX ETIR commands */
/* Push value and section index */
void
_bfd_evax_push (abfd, val, psect)
bfd *abfd;
uquad val;
int psect;
{
static int last_psect;
#if EVAX_DEBUG
evax_debug (4, "<push %016lx(%d) at %d>\n", val, psect, PRIV(stackptr));
#endif
if (psect >= 0)
last_psect = psect;
PRIV(stack[PRIV(stackptr)]).value = val;
PRIV(stack[PRIV(stackptr)]).psect = last_psect;
PRIV(stackptr)++;
if (PRIV(stackptr) >= STACKSIZE)
{
bfd_set_error (bfd_error_bad_value);
exit(1);
}
return;
}
/* Pop value and section index */
uquad
_bfd_evax_pop (abfd, psect)
bfd *abfd;
int *psect;
{
uquad value;
if (PRIV(stackptr) == 0)
{
bfd_set_error (bfd_error_bad_value);
exit(1);
}
PRIV(stackptr)--;
value = PRIV(stack[PRIV(stackptr)]).value;
if ((psect != NULL) && (PRIV(stack[PRIV(stackptr)]).psect >= 0))
*psect = PRIV(stack[PRIV(stackptr)]).psect;
#if EVAX_DEBUG
evax_debug (4, "<pop %016lx(%d)>\n", value, PRIV(stack[PRIV(stackptr)]).psect);
#endif
return value;
}
/* object file output functions */
/* GAS tends to write sections in little chunks (bfd_set_section_contents)
which we can't use directly. So we save the little chunks in linked
lists (one per section) and write them later. */
/* Add a new evax_section structure to evax_section_table
- forward chaining - */
static evax_section *
add_new_contents (abfd, section)
bfd *abfd;
sec_ptr section;
{
evax_section *sptr, *newptr;
sptr = PRIV(evax_section_table)[section->index];
if (sptr != NULL)
return sptr;
newptr = (evax_section *) bfd_malloc (sizeof (evax_section));
if (newptr == (evax_section *) NULL)
return NULL;
newptr->contents = (unsigned char *) bfd_alloc (abfd, (int)section->_raw_size);
if (newptr->contents == (unsigned char *)NULL)
return NULL;
newptr->offset = 0;
newptr->size = section->_raw_size;
newptr->next = 0;
PRIV(evax_section_table)[section->index] = newptr;
return newptr;
}
/* Save section data & offset to an evax_section structure
evax_section_table[] holds the evax_section chain */
boolean
_bfd_save_evax_section (abfd, section, data, offset, count)
bfd *abfd;
sec_ptr section;
PTR data;
file_ptr offset;
bfd_size_type count;
{
evax_section *sptr;
if (section->index >= EVAX_SECTION_COUNT)
{
bfd_set_error (bfd_error_nonrepresentable_section);
return false;
}
if (count == (bfd_size_type)0)
return true;
sptr = add_new_contents (abfd, section);
if (sptr == NULL)
return false;
memcpy (sptr->contents + offset, data, (size_t) count);
return true;
}
/* Get evax_section pointer to saved contents for section # index */
evax_section *
_bfd_get_evax_section (abfd, index)
bfd *abfd;
int index;
{
if (index >= EVAX_SECTION_COUNT)
{
bfd_set_error (bfd_error_nonrepresentable_section);
return NULL;
}
return PRIV(evax_section_table)[index];
}
/* Object output routines */
/* Begin new record or record header
write 2 bytes rectype
write 2 bytes record length (filled in at flush)
write 2 bytes header type (ommitted if rechead == -1) */
void
_bfd_evax_output_begin (abfd, rectype, rechead)
bfd *abfd;
int rectype;
int rechead;
{
#if EVAX_DEBUG
evax_debug (6, "_bfd_evax_output_begin(type %d, head %d)\n", rectype,
rechead);
#endif
_bfd_evax_output_short (abfd,rectype);
/* save current output position to fill in lenght later */
if (PRIV(push_level) > 0)
PRIV(length_pos) = PRIV(output_size);
#if EVAX_DEBUG
evax_debug (6, "_bfd_evax_output_begin: length_pos = %d\n",
PRIV(length_pos));
#endif
_bfd_evax_output_short (abfd,0); /* placeholder for length */
if (rechead != -1)
_bfd_evax_output_short (abfd,rechead);
return;
}
/* Set record/subrecord alignment */
void
_bfd_evax_output_alignment (abfd, alignto)
bfd *abfd;
int alignto;
{
#if EVAX_DEBUG
evax_debug (6, "_bfd_evax_output_alignment(%d)\n", alignto);
#endif
PRIV(output_alignment) = alignto;
return;
}
/* Prepare for subrecord fields */
void
_bfd_evax_output_push (abfd)
bfd *abfd;
{
#if EVAX_DEBUG
evax_debug (6, "evax_output_push(pushed_size = %d)\n", PRIV(output_size));
#endif
PRIV(push_level)++;
PRIV(pushed_size) = PRIV(output_size);
return;
}
/* End of subrecord fields */
void
_bfd_evax_output_pop (abfd)
bfd *abfd;
{
#if EVAX_DEBUG
evax_debug (6, "evax_output_pop(pushed_size = %d)\n", PRIV(pushed_size));
#endif
_bfd_evax_output_flush (abfd);
PRIV(length_pos) = 2;
#if EVAX_DEBUG
evax_debug (6, "evax_output_pop: length_pos = %d\n", PRIV(length_pos));
#endif
PRIV(pushed_size) = 0;
PRIV(push_level)--;
return;
}
/* Flush unwritten output, ends current record */
void
_bfd_evax_output_flush (abfd)
bfd *abfd;
{
int real_size = PRIV(output_size);
int aligncount;
int length;
#if EVAX_DEBUG
evax_debug (6, "_bfd_evax_output_flush(real_size = %d, pushed_size %d at lenpos %d)\n",
real_size, PRIV(pushed_size), PRIV(length_pos));
#endif
if (PRIV(push_level) > 0)
length = real_size - PRIV(pushed_size);
else
length = real_size;
if (length == 0)
return;
aligncount = (PRIV(output_alignment)
- (length % PRIV(output_alignment))) % PRIV(output_alignment);
#if EVAX_DEBUG
evax_debug (6, "align: adding %d bytes\n", aligncount);
#endif
while(aligncount-- > 0)
{
PRIV(output_buf)[real_size++] = 0;
#if 0
/* this is why I *love* vms: inconsistency :-}
alignment is added to the subrecord length
but not to the record length */
if (PRIV(push_level) > 0)
#endif
length++;
}
/* put length to buffer */
PRIV(output_size) = PRIV(length_pos);
_bfd_evax_output_short (abfd, (unsigned int)length);
if (PRIV(push_level) == 0)
{
#ifndef VMS
/* write length first, see FF_FOREIGN in the input routines */
fwrite (PRIV(output_buf)+2, 2, 1, (FILE *)abfd->iostream);
#endif
fwrite (PRIV(output_buf), real_size, 1, (FILE *)abfd->iostream);
PRIV(output_size) = 0;
}
else
{
PRIV(output_size) = real_size;
PRIV(pushed_size) = PRIV(output_size);
}
return;
}
/* End record output */
void
_bfd_evax_output_end (abfd)
bfd *abfd;
{
#if EVAX_DEBUG
evax_debug (6, "_bfd_evax_output_end\n");
#endif
_bfd_evax_output_flush (abfd);
return;
}
/* check remaining buffer size
return what's left. */
int
_bfd_evax_output_check (abfd, size)
bfd *abfd;
int size;
{
#if EVAX_DEBUG
evax_debug (6, "_bfd_evax_output_check(%d)\n", size);
#endif
return (MAX_OUTREC_SIZE - (PRIV(output_size) + size + MIN_OUTREC_LUFT));
}
/* Output byte (8 bit) value */
void
_bfd_evax_output_byte (abfd, value)
bfd *abfd;
unsigned int value;
{
#if EVAX_DEBUG
evax_debug (6, "_bfd_evax_output_byte(%02x)\n", value);
#endif
bfd_put_8 (abfd, value & 0xff, PRIV(output_buf) + PRIV(output_size));
PRIV(output_size) += 1;
return;
}
/* Output short (16 bit) value */
void
_bfd_evax_output_short (abfd, value)
bfd *abfd;
unsigned int value;
{
#if EVAX_DEBUG
evax_debug (6, "_bfd_evax_output_short (%04x)\n", value);
#endif
bfd_put_16 (abfd, value & 0xffff, PRIV(output_buf) + PRIV(output_size));
PRIV(output_size) += 2;
return;
}
/* Output long (32 bit) value */
void
_bfd_evax_output_long (abfd, value)
bfd *abfd;
unsigned long value;
{
#if EVAX_DEBUG
evax_debug (6, "_bfd_evax_output_long (%08lx)\n", value);
#endif
bfd_put_32 (abfd, value, PRIV(output_buf) + PRIV(output_size));
PRIV(output_size) += 4;
return;
}
/* Output quad (64 bit) value */
void
_bfd_evax_output_quad (abfd, value)
bfd *abfd;
uquad value;
{
#if EVAX_DEBUG
evax_debug (6, "_bfd_evax_output_quad(%016lx)\n", value);
#endif
bfd_put_64(abfd, value, PRIV(output_buf) + PRIV(output_size));
PRIV(output_size) += 8;
return;
}
/* Output c-string as counted string */
void
_bfd_evax_output_counted (abfd, value)
bfd *abfd;
char *value;
{
int len;
#if EVAX_DEBUG
evax_debug (6, "_bfd_evax_output_counted(%s)\n", value);
#endif
len = strlen (value);
if (len == 0)
{
(*_bfd_error_handler) (_("_bfd_evax_output_counted called with zero bytes"));
return;
}
if (len > 255)
{
(*_bfd_error_handler) (_("_bfd_evax_output_counted called with too many bytes"));
return;
}
_bfd_evax_output_byte (abfd, len & 0xff);
_bfd_evax_output_dump (abfd, (unsigned char *)value, len);
}
/* Output character area */
void
_bfd_evax_output_dump (abfd, data, length)
bfd *abfd;
unsigned char *data;
int length;
{
#if EVAX_DEBUG
evax_debug (6, "_bfd_evax_output_dump(%d)\n", length);
#endif
if (length == 0)
return;
memcpy (PRIV(output_buf) + PRIV(output_size), data, length);
PRIV(output_size) += length;
return;
}
/* Output count bytes of value */
void
_bfd_evax_output_fill (abfd, value, count)
bfd *abfd;
int value;
int count;
{
#if EVAX_DEBUG
evax_debug (6, "_bfd_evax_output_fill(val %02x times %d)\n", value, count);
#endif
if (count == 0)
return;
memset (PRIV(output_buf) + PRIV(output_size), value, count);
PRIV(output_size) += count;
return;
}
/* this hash routine borrowed from GNU-EMACS, and strengthened slightly ERY*/
static int
hash_string (ptr)
const char *ptr;
{
register const unsigned char *p = (unsigned char *) ptr;
register const unsigned char *end = p + strlen (ptr);
register unsigned char c;
register int hash = 0;
while (p != end)
{
c = *p++;
hash = ((hash << 3) + (hash << 15) + (hash >> 28) + c);
}
return hash;
}
/* Generate a length-hashed VMS symbol name (limited to maxlen chars). */
char *
_bfd_evax_length_hash_symbol (abfd, in, maxlen)
bfd *abfd;
const char *in;
int maxlen;
{
long int init;
long int result;
int in_len;
char *pnt = 0;
char *new_name;
const char *old_name;
int i;
static char outbuf[EOBJ_S_C_SYMSIZ+1];
char *out = outbuf;
#if EVAX_DEBUG
evax_debug(4, "_bfd_evax_length_hash_symbol \"%s\"\n", in);
#endif
if (maxlen > EOBJ_S_C_SYMSIZ)
maxlen = EOBJ_S_C_SYMSIZ;
new_name = out; /* save this for later. */
/* We may need to truncate the symbol, save the hash for later. */
in_len = strlen (in);
result = (in_len > maxlen) ? hash_string (in) : 0;
old_name = in;
/* Do the length checking. */
if (in_len <= maxlen)
{
i = in_len;
}
else
{
if (PRIV(flag_hash_long_names))
i = maxlen-9;
else
i = maxlen;
}
strncpy (out, in, i);
in += i;
out += i;
if ((in_len > maxlen)
&& PRIV(flag_hash_long_names))
sprintf (out, "_%08x", result);
else
*out = 0;
#if EVAX_DEBUG
evax_debug(4, "--> [%d]\"%s\"\n", strlen (outbuf), outbuf);
#endif
if (in_len > maxlen
&& PRIV(flag_hash_long_names)
&& PRIV(flag_show_after_trunc))
printf (_("Symbol %s replaced by %s\n"), old_name, new_name);
return outbuf;
}
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