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/* vms-misc.c -- BFD back-end for VMS/VAX (openVMS/VAX) and
   EVAX (openVMS/Alpha) files.
   Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
   2007, 2008, 2009  Free Software Foundation, Inc.
 
   Miscellaneous functions.
 
   Written by Klaus K"ampf (kkaempf@rmi.de)
 
   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.  */
 
#if __STDC__
#include <stdarg.h>
#endif
 
#include "sysdep.h"
#include "bfd.h"
#include "bfdlink.h"
#include "libbfd.h"
 
#include "vms.h"
 
#define MIN(a,b) ((a) < (b) ? (a) : (b))
 
static int hash_string PARAMS ((const char *));
static asymbol *new_symbol PARAMS ((bfd *, char *));
static void maybe_adjust_record_pointer_for_object PARAMS ((bfd *));
static int vms_get_remaining_object_record PARAMS ((bfd *, int ));
static int vms_get_remaining_image_record PARAMS ((bfd *, int ));
 
#if VMS_DEBUG
/* Debug functions.  */
 
/* Debug function for all vms extensions evaluates environment
   variable VMS_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 indentation level. Indentation is performed
   if level > 0.  */
 
void
_bfd_vms_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 ("VMS_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);
}
 
/* A debug function
   hex dump 'size' bytes starting at 'ptr'.  */
 
void
_bfd_hexdump (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)
        vms_debug (level, "%08lx:", start);
      vms_debug (-level, " %02x", *ptr++);
      count++;
      start++;
      if (size == 0)
        {
          while ((count%16) != 0)
            {
              vms_debug (-level, "   ");
              count++;
            }
        }
      if ((count%16) == 0)
        {
          vms_debug (-level, " ");
          while (lptr < ptr)
            {
              vms_debug (-level, "%c", (*lptr < 32)?'.':*lptr);
              lptr++;
            }
          vms_debug (-level, "\n");
        }
    }
  if ((count%16) != 0)
    vms_debug (-level, "\n");
}
#endif
 
/* Hash functions
 
   These are needed when reading an object file.  */
 
/* Allocate new vms_hash_entry
   keep the symbol name and a pointer to the bfd symbol in the table.  */
 
struct bfd_hash_entry *
_bfd_vms_hash_newfunc (struct bfd_hash_entry *entry,
                       struct bfd_hash_table *table,
                       const char *string)
{
  vms_symbol_entry *ret;
 
#if VMS_DEBUG
  vms_debug (5, "_bfd_vms_hash_newfunc (%p, %p, %s)\n", entry, table, string);
#endif
 
  if (entry == NULL)
    {
      ret = (vms_symbol_entry *)
              bfd_hash_allocate (table, sizeof (vms_symbol_entry));
      if (ret ==  NULL)
        {
          bfd_set_error (bfd_error_no_memory);
          return NULL;
        }
      entry = (struct bfd_hash_entry *) ret;
    }
 
  /* Call the allocation method of the base class.  */
  ret = (vms_symbol_entry *) bfd_hash_newfunc (entry, table, string);
#if VMS_DEBUG
  vms_debug (6, "_bfd_vms_hash_newfunc ret %p\n", ret);
#endif
 
  ret->symbol = NULL;
 
  return (struct bfd_hash_entry *)ret;
}
 
/* Object file input functions.  */
 
/* Return type and size from record header (buf) on Alpha.  */
 
void
_bfd_vms_get_header_values (bfd * abfd ATTRIBUTE_UNUSED,
                            unsigned char *buf,
                            int *type,
                            int *size)
{
  if (type)
    *type = bfd_getl16 (buf);
 
  if (size)
    *size = bfd_getl16 (buf+2);
 
#if VMS_DEBUG
  vms_debug (10, "_bfd_vms_get_header_values type %x, size %x\n",
             type ? *type : 0, size ? *size : 0);
#endif
}
 
/* Get next record from object file to vms_buf.
   Set PRIV(buf_size) and return it
 
   This is a little tricky since it should be portable.
 
   The openVMS 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 size 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, the DEC implementation of TCP/IP.
 
   The VMS format repeats the size 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:
    1. first just the record header is read and the size extracted,
    2. then the read buffer is adjusted and the remaining bytes are
       read in.
 
   All file I/O is done on even file positions.  */
 
#define VMS_OBJECT_ADJUSTMENT  2
 
static void
maybe_adjust_record_pointer_for_object (bfd *abfd)
{
  /* Set the file format once for all on the first invocation.  */
  if (PRIV (file_format) == FF_UNKNOWN)
    {
      if (PRIV (vms_rec)[0] == PRIV (vms_rec)[4]
          && PRIV (vms_rec)[1] == PRIV (vms_rec)[5])
        PRIV (file_format) = FF_FOREIGN;
      else
        PRIV (file_format) = FF_NATIVE;
    }
 
  /* The adjustment is needed only in an Unix environment.  */
  if (PRIV (file_format) == FF_FOREIGN)
    PRIV (vms_rec) += VMS_OBJECT_ADJUSTMENT;
}
 
/* Get first record from file and return the file type.  */
 
int
_bfd_vms_get_first_record (bfd *abfd)
{
  unsigned int test_len;
 
#if VMS_DEBUG
  vms_debug (8, "_bfd_vms_get_first_record\n");
#endif
 
  if (PRIV (is_vax))
    test_len = 0;
  else
    /* Minimum is 6 bytes for objects (2 bytes size, 2 bytes record id,
       2 bytes size repeated) and 12 bytes for images (4 bytes major id,
       4 bytes minor id, 4 bytes length).  */
    test_len = 12;
 
  /* Size the main buffer.  */
  if (PRIV (buf_size) == 0)
    {
      /* On VAX there's no size information in the record, so
         start with OBJ_S_C_MAXRECSIZ.  */
      bfd_size_type amt = (test_len ? test_len : OBJ_S_C_MAXRECSIZ);
      PRIV (vms_buf) = (unsigned char *) bfd_malloc (amt);
      PRIV (buf_size) = amt;
    }
 
  /* Initialize the record pointer.  */
  PRIV (vms_rec) = PRIV (vms_buf);
 
  /* We only support modules on VAX.  */
  if (PRIV (is_vax))
    {
      if (vms_get_remaining_object_record (abfd, test_len) <= 0)
        return FT_UNKNOWN;
 
#if VMS_DEBUG
      vms_debug (2, "file type is VAX module\n");
#endif
 
      return FT_MODULE;
    }
 
  if (bfd_bread (PRIV (vms_buf), test_len, abfd) != test_len)
    {
      bfd_set_error (bfd_error_file_truncated);
      return FT_UNKNOWN;
    }
 
  /* Is it an image?  */
  if ((bfd_getl32 (PRIV (vms_rec)) == EIHD_S_K_MAJORID)
      && (bfd_getl32 (PRIV (vms_rec) + 4) == EIHD_S_K_MINORID))
    {
      if (vms_get_remaining_image_record (abfd, test_len) <= 0)
        return FT_UNKNOWN;
 
#if VMS_DEBUG
      vms_debug (2, "file type is image\n");
#endif
 
      return FT_IMAGE;
    }
 
  /* Assume it's a module and adjust record pointer if necessary.  */
  maybe_adjust_record_pointer_for_object (abfd);
 
  /* But is it really a module?  */
  if (bfd_getl16 (PRIV (vms_rec)) <= EOBJ_S_C_MAXRECTYP
      && bfd_getl16 (PRIV (vms_rec) + 2) <= EOBJ_S_C_MAXRECSIZ)
    {
      if (vms_get_remaining_object_record (abfd, test_len) <= 0)
        return FT_UNKNOWN;
 
#if VMS_DEBUG
      vms_debug (2, "file type is module\n");
#endif
 
      return FT_MODULE;
    }
 
#if VMS_DEBUG
  vms_debug (2, "file type is unknown\n");
#endif
 
  return FT_UNKNOWN;
}
 
/* Implement step #1 of the object record reading procedure.
   Return the record type or -1 on failure.  */
 
int
_bfd_vms_get_object_record (bfd *abfd)
{
  unsigned int test_len;
  int type;
 
#if VMS_DEBUG
  vms_debug (8, "_bfd_vms_get_obj_record\n");
#endif
 
  if (PRIV (is_vax))
    test_len = 0;
  else
    {
      /* See _bfd_vms_get_first_record.  */
      test_len = 6;
 
      /* Skip odd alignment byte.  */
      if (bfd_tell (abfd) & 1)
        {
          if (bfd_bread (PRIV (vms_buf), 1, abfd) != 1)
            {
              bfd_set_error (bfd_error_file_truncated);
              return -1;
            }
        }
 
      /* Read the record header  */
      if (bfd_bread (PRIV (vms_buf), test_len, abfd) != test_len)
        {
          bfd_set_error (bfd_error_file_truncated);
          return -1;
        }
 
      /* Reset the record pointer.  */
      PRIV (vms_rec) = PRIV (vms_buf);
      maybe_adjust_record_pointer_for_object (abfd);
    }
 
  if (vms_get_remaining_object_record (abfd, test_len) <= 0)
    return -1;
 
  if (PRIV (is_vax))
    type = PRIV (vms_rec) [0];
  else
    type = bfd_getl16 (PRIV (vms_rec));
 
#if VMS_DEBUG
  vms_debug (8, "_bfd_vms_get_obj_record: rec %p, size %d, type %d\n",
              PRIV (vms_rec), PRIV (rec_size), type);
#endif
 
  return type;
}
 
/* Implement step #2 of the object record reading procedure.
   Return the size of the record or 0 on failure.  */
 
static int
vms_get_remaining_object_record (bfd *abfd, int read_so_far)
{
#if VMS_DEBUG
  vms_debug (8, "vms_get_remaining_obj_record\n");
#endif
 
  if (PRIV (is_vax))
    {
      if (read_so_far != 0)
        abort ();
 
      PRIV (rec_size) = bfd_bread (PRIV (vms_buf), PRIV (buf_size), abfd);
 
      if (PRIV (rec_size) <= 0)
        {
          bfd_set_error (bfd_error_file_truncated);
          return 0;
        }
 
      /* Reset the record pointer.  */
      PRIV (vms_rec) = PRIV (vms_buf);
    }
  else
    {
      unsigned int to_read;
 
      /* Extract record size.  */
      PRIV (rec_size) = bfd_getl16 (PRIV (vms_rec) + 2);
 
      if (PRIV (rec_size) <= 0)
        {
          bfd_set_error (bfd_error_file_truncated);
          return 0;
        }
 
      /* That's what the linker manual says.  */
      if (PRIV (rec_size) > EOBJ_S_C_MAXRECSIZ)
        {
          bfd_set_error (bfd_error_file_truncated);
          return 0;
        }
 
      /* Take into account object adjustment.  */
      to_read = PRIV (rec_size);
      if (PRIV (file_format) == FF_FOREIGN)
        to_read += VMS_OBJECT_ADJUSTMENT;
 
      /* Adjust the buffer.  */
      if (to_read > PRIV (buf_size))
        {
          PRIV (vms_buf)
            = (unsigned char *) bfd_realloc (PRIV (vms_buf), to_read);
          if (PRIV (vms_buf) == NULL)
            return 0;
          PRIV (buf_size) = to_read;
        }
 
      /* Read the remaining record.  */
      to_read -= read_so_far;
 
#if VMS_DEBUG
      vms_debug (8, "vms_get_remaining_obj_record: to_read %d\n", to_read);
#endif
 
      if (bfd_bread (PRIV (vms_buf) + read_so_far, to_read, abfd) != to_read)
        {
          bfd_set_error (bfd_error_file_truncated);
          return 0;
        }
 
      /* Reset the record pointer.  */
      PRIV (vms_rec) = PRIV (vms_buf);
      maybe_adjust_record_pointer_for_object (abfd);
    }
 
#if VMS_DEBUG
  vms_debug (8, "vms_get_remaining_obj_record: size %d\n", PRIV (rec_size));
#endif
 
  return PRIV (rec_size);
}
 
/* Implement step #2 of the record reading procedure for images.
   Return the size of the record or 0 on failure.  */
 
static int
vms_get_remaining_image_record (bfd *abfd, int read_so_far)
{
  unsigned int to_read;
  int remaining;
 
  /* Extract record size.  */
  PRIV (rec_size) = bfd_getl32 (PRIV (vms_rec) + EIHD_S_L_SIZE);
 
  if (PRIV (rec_size) > PRIV (buf_size))
    {
      PRIV (vms_buf) = bfd_realloc (PRIV (vms_buf), PRIV (rec_size));
 
      if (PRIV (vms_buf) == NULL)
        {
          bfd_set_error (bfd_error_no_memory);
          return 0;
        }
 
      PRIV (buf_size) = PRIV (rec_size);
    }
 
  /* Read the remaining record.  */
  remaining = PRIV (rec_size) - read_so_far;
  to_read = MIN (VMS_BLOCK_SIZE - read_so_far, remaining);
 
  while (remaining > 0)
    {
      if (bfd_bread (PRIV (vms_buf) + read_so_far, to_read, abfd) != to_read)
        {
          bfd_set_error (bfd_error_file_truncated);
          return 0;
        }
 
      read_so_far += to_read;
      remaining -= to_read;
 
      /* Eat trailing 0xff's.  */
      if (remaining > 0)
        while (PRIV (vms_buf) [read_so_far - 1] == 0xff)
          read_so_far--;
 
      to_read = MIN (VMS_BLOCK_SIZE, remaining);
    }
 
  /* Reset the record pointer.  */
  PRIV (vms_rec) = PRIV (vms_buf);
 
  return PRIV (rec_size);
}
 
/* Copy sized string (string with fixed size) to new allocated area
   size is string size (size of record)  */
 
char *
_bfd_vms_save_sized_string (unsigned char *str, int size)
{
  char *newstr = bfd_malloc ((bfd_size_type) size + 1);
 
  if (newstr == NULL)
    return NULL;
  strncpy (newstr, (char *) str, (size_t) size);
  newstr[size] = 0;
 
  return newstr;
}
 
/* Copy counted string (string with size at first byte) to new allocated area
   ptr points to size byte on entry  */
 
char *
_bfd_vms_save_counted_string (unsigned char *ptr)
{
  int len = *ptr++;
 
  return _bfd_vms_save_sized_string (ptr, len);
}
 
/* Stack routines for vms ETIR commands.  */
 
/* Push value and section index.  */
 
void
_bfd_vms_push (bfd * abfd, uquad val, int psect)
{
  static int last_psect;
 
#if VMS_DEBUG
  vms_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);
      (*_bfd_error_handler) (_("Stack overflow (%d) in _bfd_vms_push"), PRIV (stackptr));
      exit (1);
    }
}
 
/* Pop value and section index.  */
 
uquad
_bfd_vms_pop (bfd * abfd, int *psect)
{
  uquad value;
 
  if (PRIV (stackptr) == 0)
    {
      bfd_set_error (bfd_error_bad_value);
      (*_bfd_error_handler) (_("Stack underflow in _bfd_vms_pop"));
      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 VMS_DEBUG
  vms_debug (4, "<pop %016lx(%d)>\n", value, PRIV (stack[PRIV (stackptr)]).psect);
#endif
 
  return value;
}
 
/* 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_vms_output_begin (bfd * abfd, int rectype, int rechead)
{
#if VMS_DEBUG
  vms_debug (6, "_bfd_vms_output_begin (type %d, head %d)\n", rectype,
              rechead);
#endif
 
  _bfd_vms_output_short (abfd, (unsigned int) rectype);
 
  /* Save current output position to fill in length later.   */
 
  if (PRIV (push_level) > 0)
    PRIV (length_pos) = PRIV (output_size);
 
#if VMS_DEBUG
  vms_debug (6, "_bfd_vms_output_begin: length_pos = %d\n",
              PRIV (length_pos));
#endif
 
  /* Placeholder for length.  */
  _bfd_vms_output_short (abfd, 0);
 
  if (rechead != -1)
    _bfd_vms_output_short (abfd, (unsigned int) rechead);
}
 
/* Set record/subrecord alignment.   */
 
void
_bfd_vms_output_alignment (bfd * abfd, int alignto)
{
#if VMS_DEBUG
  vms_debug (6, "_bfd_vms_output_alignment (%d)\n", alignto);
#endif
 
  PRIV (output_alignment) = alignto;
}
 
/* Prepare for subrecord fields.  */
 
void
_bfd_vms_output_push (bfd * abfd)
{
#if VMS_DEBUG
  vms_debug (6, "vms_output_push (pushed_size = %d)\n", PRIV (output_size));
#endif
 
  PRIV (push_level)++;
  PRIV (pushed_size) = PRIV (output_size);
}
 
/* End of subrecord fields.   */
 
void
_bfd_vms_output_pop (bfd * abfd)
{
#if VMS_DEBUG
  vms_debug (6, "vms_output_pop (pushed_size = %d)\n", PRIV (pushed_size));
#endif
 
  _bfd_vms_output_flush (abfd);
  PRIV (length_pos) = 2;
 
#if VMS_DEBUG
  vms_debug (6, "vms_output_pop: length_pos = %d\n", PRIV (length_pos));
#endif
 
  PRIV (pushed_size) = 0;
  PRIV (push_level)--;
}
 
/* Flush unwritten output, ends current record.  */
 
void
_bfd_vms_output_flush (bfd * abfd)
{
  int real_size = PRIV (output_size);
  int aligncount;
  int length;
 
#if VMS_DEBUG
  vms_debug (6, "_bfd_vms_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 VMS_DEBUG
  vms_debug (6, "align: adding %d bytes\n", aligncount);
#endif
 
  while (aligncount-- > 0)
    {
      PRIV (output_buf)[real_size++] = 0;
      length++;
    }
 
  /* Put length to buffer.  */
  PRIV (output_size) = PRIV (length_pos);
  _bfd_vms_output_short (abfd, (unsigned int) length);
 
  if (PRIV (push_level) == 0)
    {
      /* File is open in undefined (UDF) format on VMS, but ultimately will be
         converted to variable length (VAR) format.  VAR format has a length
         word first which must be explicitly output in UDF format.  */
      bfd_bwrite (PRIV (output_buf) + 2, 2, abfd);
      bfd_bwrite (PRIV (output_buf), (size_t) real_size, abfd);
      PRIV (output_size) = 0;
    }
  else
    {
      PRIV (output_size) = real_size;
      PRIV (pushed_size) = PRIV (output_size);
    }
}
 
/* End record output.   */
 
void
_bfd_vms_output_end (bfd * abfd)
{
#if VMS_DEBUG
  vms_debug (6, "_bfd_vms_output_end\n");
#endif
 
  _bfd_vms_output_flush (abfd);
}
 
/* Check remaining buffer size
 
   Return what's left.  */
 
int
_bfd_vms_output_check (bfd * abfd, int size)
{
#if VMS_DEBUG
  vms_debug (6, "_bfd_vms_output_check (%d)\n", size);
#endif
 
  return (MAX_OUTREC_SIZE - (PRIV (output_size) + size + MIN_OUTREC_LUFT));
}
 
/* Output byte (8 bit) value.  */
 
void
_bfd_vms_output_byte (bfd * abfd, unsigned int value)
{
#if VMS_DEBUG
  vms_debug (6, "_bfd_vms_output_byte (%02x)\n", value);
#endif
 
  bfd_put_8 (abfd, value & 0xff, PRIV (output_buf) + PRIV (output_size));
  PRIV (output_size) += 1;
}
 
/* Output short (16 bit) value.  */
 
void
_bfd_vms_output_short (bfd * abfd, unsigned int value)
{
#if VMS_DEBUG
  vms_debug (6, "_bfd_vms_output_short (%04x)\n", value);
#endif
 
  bfd_put_16 (abfd, (bfd_vma) value & 0xffff,
              PRIV (output_buf) + PRIV (output_size));
  PRIV (output_size) += 2;
}
 
/* Output long (32 bit) value.  */
 
void
_bfd_vms_output_long (bfd * abfd, unsigned long value)
{
#if VMS_DEBUG
  vms_debug (6, "_bfd_vms_output_long (%08lx)\n", value);
#endif
 
  bfd_put_32 (abfd, (bfd_vma) value, PRIV (output_buf) + PRIV (output_size));
  PRIV (output_size) += 4;
}
 
/* Output quad (64 bit) value.  */
 
void
_bfd_vms_output_quad (bfd * abfd, uquad value)
{
#if VMS_DEBUG
  vms_debug (6, "_bfd_vms_output_quad (%016lx)\n", value);
#endif
 
  bfd_put_64(abfd, value, PRIV (output_buf) + PRIV (output_size));
  PRIV (output_size) += 8;
}
 
/* Output c-string as counted string.  */
 
void
_bfd_vms_output_counted (bfd * abfd, char *value)
{
  int len;
 
#if VMS_DEBUG
  vms_debug (6, "_bfd_vms_output_counted (%s)\n", value);
#endif
 
  len = strlen (value);
  if (len == 0)
    {
      (*_bfd_error_handler) (_("_bfd_vms_output_counted called with zero bytes"));
      return;
    }
  if (len > 255)
    {
      (*_bfd_error_handler) (_("_bfd_vms_output_counted called with too many bytes"));
      return;
    }
  _bfd_vms_output_byte (abfd, (unsigned int) len & 0xff);
  _bfd_vms_output_dump (abfd, (unsigned char *) value, len);
}
 
/* Output character area.  */
 
void
_bfd_vms_output_dump (bfd * abfd,
                      unsigned char *data,
                      int length)
{
#if VMS_DEBUG
  vms_debug (6, "_bfd_vms_output_dump (%d)\n", length);
#endif
 
  if (length == 0)
    return;
 
  memcpy (PRIV (output_buf) + PRIV (output_size), data, (size_t) length);
  PRIV (output_size) += length;
}
 
/* Output count bytes of value.  */
 
void
_bfd_vms_output_fill (bfd * abfd,
                      int value,
                      int count)
{
#if VMS_DEBUG
  vms_debug (6, "_bfd_vms_output_fill (val %02x times %d)\n", value, count);
#endif
 
  if (count == 0)
    return;
  memset (PRIV (output_buf) + PRIV (output_size), value, (size_t) count);
  PRIV (output_size) += count;
}
 
/* This hash routine borrowed from GNU-EMACS, and strengthened slightly.  ERY.  */
 
static int
hash_string (const char *ptr)
{
  const unsigned char *p = (unsigned char *) ptr;
  const unsigned char *end = p + strlen (ptr);
  unsigned char c;
  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_vms_length_hash_symbol (bfd * abfd, const char *in, int maxlen)
{
  unsigned long result;
  int in_len;
  char *new_name;
  const char *old_name;
  int i;
  static char outbuf[EOBJ_S_C_SYMSIZ+1];
  char *out = outbuf;
 
#if VMS_DEBUG
  vms_debug (4, "_bfd_vms_length_hash_symbol \"%s\"\n", in);
#endif
 
  if (maxlen > EOBJ_S_C_SYMSIZ)
    maxlen = EOBJ_S_C_SYMSIZ;
 
  /* Save this for later.  */
  new_name = out;
 
  /* 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, (size_t) i);
  in += i;
  out += i;
 
  if ((in_len > maxlen)
      && PRIV (flag_hash_long_names))
    sprintf (out, "_%08lx", result);
  else
    *out = 0;
 
#if VMS_DEBUG
  vms_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;
}
 
/* Allocate and initialize a new symbol.  */
 
static asymbol *
new_symbol (bfd * abfd, char *name)
{
  asymbol *symbol;
 
#if VMS_DEBUG
  _bfd_vms_debug (7,  "new_symbol %s\n", name);
#endif
 
  symbol = bfd_make_empty_symbol (abfd);
  if (symbol == 0)
    return symbol;
  symbol->name = name;
  symbol->section = (asection *)(unsigned long)-1;
 
  return symbol;
}
 
/* Allocate and enter a new private symbol.  */
 
vms_symbol_entry *
_bfd_vms_enter_symbol (bfd * abfd, char *name)
{
  vms_symbol_entry *entry;
 
#if VMS_DEBUG
  _bfd_vms_debug (6,  "_bfd_vms_enter_symbol %s\n", name);
#endif
 
  entry = (vms_symbol_entry *)
          bfd_hash_lookup (PRIV (vms_symbol_table), name, FALSE, FALSE);
  if (entry == 0)
    {
#if VMS_DEBUG
      _bfd_vms_debug (8,  "creating hash entry for %s\n", name);
#endif
      entry = (vms_symbol_entry *) bfd_hash_lookup (PRIV (vms_symbol_table),
                                                    name, TRUE, FALSE);
      if (entry != 0)
        {
          asymbol *symbol;
          symbol = new_symbol (abfd, name);
          if (symbol != 0)
            {
              entry->symbol = symbol;
              PRIV (gsd_sym_count)++;
              abfd->symcount++;
            }
          else
            entry = 0;
        }
      else
        (*_bfd_error_handler) (_("failed to enter %s"), name);
    }
  else
    {
#if VMS_DEBUG
      _bfd_vms_debug (8,  "found hash entry for %s\n", name);
#endif
    }
 
#if VMS_DEBUG
  _bfd_vms_debug (7, "-> entry %p, entry->symbol %p\n", entry, entry->symbol);
#endif
  return entry;
}

Line No.	Rev	Author	Line
1	225	jeremybenn	`/* vms-misc.c -- BFD back-end for VMS/VAX (openVMS/VAX) and`
2	24	jeremybenn	`EVAX (openVMS/Alpha) files.`
3			`Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,`
4	225	jeremybenn	`2007, 2008, 2009 Free Software Foundation, Inc.`
5	24	jeremybenn
6	225	jeremybenn	`Miscellaneous functions.`
7
8	24	jeremybenn	`Written by Klaus K"ampf (kkaempf@rmi.de)`
9
10			`This program is free software; you can redistribute it and/or modify`
11			`it under the terms of the GNU General Public License as published by`
12			`the Free Software Foundation; either version 3 of the License, or`
13			`(at your option) any later version.`
14
15			`This program is distributed in the hope that it will be useful,`
16			`but WITHOUT ANY WARRANTY; without even the implied warranty of`
17			`MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the`
18			`GNU General Public License for more details.`
19
20			`You should have received a copy of the GNU General Public License`
21			`along with this program; if not, write to the Free Software`
22			`Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,`
23			`MA 02110-1301, USA. */`
24
25			`#if __STDC__`
26			`#include <stdarg.h>`
27			`#endif`
28
29			`#include "sysdep.h"`
30			`#include "bfd.h"`
31			`#include "bfdlink.h"`
32			`#include "libbfd.h"`
33
34			`#include "vms.h"`
35	225	jeremybenn
36			`#define MIN(a,b) ((a) < (b) ? (a) : (b))`
37
38			`static int hash_string PARAMS ((const char *));`
39			`static asymbol new_symbol PARAMS ((bfd , char *));`
40			`static void maybe_adjust_record_pointer_for_object PARAMS ((bfd *));`
41			`static int vms_get_remaining_object_record PARAMS ((bfd *, int ));`
42			`static int vms_get_remaining_image_record PARAMS ((bfd *, int ));`
43
44	24	jeremybenn	`#if VMS_DEBUG`
45			`/* Debug functions. */`
46
47	225	jeremybenn	`/* Debug function for all vms extensions evaluates environment`
48			`variable VMS_DEBUG for a numerical value on the first call all`
49			`error levels below this value are printed:`
50	24	jeremybenn
51	225	jeremybenn	`Levels:`
52	24	jeremybenn	`1 toplevel bfd calls (functions from the bfd vector)`
53			`2 functions called by bfd calls`
54			`...`
55			`9 almost everything`
56
57	225	jeremybenn	`Level is also indentation level. Indentation is performed`
58	24	jeremybenn	`if level > 0. */`
59
60			`void`
61			`_bfd_vms_debug (int level, char *format, ...)`
62			`{`
63			`static int min_level = -1;`
64			`static FILE *output = NULL;`
65			`char *eptr;`
66			`va_list args;`
67			`int abslvl = (level > 0) ? level : - level;`
68
69			`if (min_level == -1)`
70			`{`
71			`if ((eptr = getenv ("VMS_DEBUG")) != NULL)`
72			`{`
73			`min_level = atoi (eptr);`
74			`output = stderr;`
75			`}`
76			`else`
77			`min_level = 0;`
78			`}`
79			`if (output == NULL)`
80			`return;`
81			`if (abslvl > min_level)`
82			`return;`
83
84			`while (--level>0)`
85			`fprintf (output, " ");`
86			`va_start (args, format);`
87			`vfprintf (output, format, args);`
88			`fflush (output);`
89			`va_end (args);`
90			`}`
91
92			`/* A debug function`
93			`hex dump 'size' bytes starting at 'ptr'. */`
94
95			`void`
96			`_bfd_hexdump (int level,`
97			`unsigned char *ptr,`
98			`int size,`
99			`int offset)`
100			`{`
101			`unsigned char *lptr = ptr;`
102			`int count = 0;`
103			`long start = offset;`
104
105			`while (size-- > 0)`
106			`{`
107			`if ((count%16) == 0)`
108			`vms_debug (level, "%08lx:", start);`
109			`vms_debug (-level, " %02x", *ptr++);`
110			`count++;`
111			`start++;`
112			`if (size == 0)`
113			`{`
114			`while ((count%16) != 0)`
115			`{`
116			`vms_debug (-level, " ");`
117			`count++;`
118			`}`
119			`}`
120			`if ((count%16) == 0)`
121			`{`
122			`vms_debug (-level, " ");`
123			`while (lptr < ptr)`
124			`{`
125			`vms_debug (-level, "%c", (lptr < 32)?'.':lptr);`
126			`lptr++;`
127			`}`
128			`vms_debug (-level, "\n");`
129			`}`
130			`}`
131			`if ((count%16) != 0)`
132			`vms_debug (-level, "\n");`
133			`}`
134			`#endif`
135
136			`/* Hash functions`
137
138			`These are needed when reading an object file. */`
139
140			`/* Allocate new vms_hash_entry`
141			`keep the symbol name and a pointer to the bfd symbol in the table. */`
142
143			`struct bfd_hash_entry *`
144			`_bfd_vms_hash_newfunc (struct bfd_hash_entry *entry,`
145			`struct bfd_hash_table *table,`
146			`const char *string)`
147			`{`
148			`vms_symbol_entry *ret;`
149
150			`#if VMS_DEBUG`
151			`vms_debug (5, "_bfd_vms_hash_newfunc (%p, %p, %s)\n", entry, table, string);`
152			`#endif`
153
154			`if (entry == NULL)`
155			`{`
156			`ret = (vms_symbol_entry *)`
157			`bfd_hash_allocate (table, sizeof (vms_symbol_entry));`
158			`if (ret == NULL)`
159			`{`
160			`bfd_set_error (bfd_error_no_memory);`
161			`return NULL;`
162			`}`
163			`entry = (struct bfd_hash_entry *) ret;`
164			`}`
165
166			`/* Call the allocation method of the base class. */`
167			`ret = (vms_symbol_entry *) bfd_hash_newfunc (entry, table, string);`
168			`#if VMS_DEBUG`
169			`vms_debug (6, "_bfd_vms_hash_newfunc ret %p\n", ret);`
170			`#endif`
171
172			`ret->symbol = NULL;`
173
174			`return (struct bfd_hash_entry *)ret;`
175			`}`
176
177			`/* Object file input functions. */`
178
179	225	jeremybenn	`/* Return type and size from record header (buf) on Alpha. */`
180	24	jeremybenn
181			`void`
182			`_bfd_vms_get_header_values (bfd * abfd ATTRIBUTE_UNUSED,`
183			`unsigned char *buf,`
184			`int *type,`
185	225	jeremybenn	`int *size)`
186	24	jeremybenn	`{`
187	225	jeremybenn	`if (type)`
188	24	jeremybenn	`*type = bfd_getl16 (buf);`
189
190	225	jeremybenn	`if (size)`
191			`*size = bfd_getl16 (buf+2);`
192
193	24	jeremybenn	`#if VMS_DEBUG`
194	225	jeremybenn	`vms_debug (10, "_bfd_vms_get_header_values type %x, size %x\n",`
195			`type ? type : 0, size ? size : 0);`
196	24	jeremybenn	`#endif`
197			`}`
198
199			`/* Get next record from object file to vms_buf.`
200			`Set PRIV(buf_size) and return it`
201
202			`This is a little tricky since it should be portable.`
203
204			`The openVMS object file has 'variable length' which means that`
205			`read() returns data in chunks of (hopefully) correct and expected`
206	225	jeremybenn	`size. The linker (and other tools on VMS) depend on that. Unix`
207			`doesn't know about 'formatted' files, so reading and writing such`
208			`an object file in a Unix environment is not trivial.`
209	24	jeremybenn
210	225	jeremybenn	`With the tool 'file' (available on all VMS FTP sites), one`
211			`can view and change the attributes of a file. Changing from`
212	24	jeremybenn	`'variable length' to 'fixed length, 512 bytes' reveals the`
213	225	jeremybenn	`record size at the first 2 bytes of every record. The same`
214			`happens during the transfer of object files from VMS to Unix,`
215			`at least with UCX, the DEC implementation of TCP/IP.`
216	24	jeremybenn
217	225	jeremybenn	`The VMS format repeats the size at bytes 2 & 3 of every record.`
218	24	jeremybenn
219			`On the first call (file_format == FF_UNKNOWN) we check if`
220			`the first and the third byte pair (!) of the record match.`
221	225	jeremybenn	`If they do it's an object file in an Unix environment or with`
222			`wrong attributes (FF_FOREIGN), else we should be in a VMS`
223	24	jeremybenn	`environment where read() returns the record size (FF_NATIVE).`
224
225	225	jeremybenn	`Reading is always done in 2 steps:`
226			`1. first just the record header is read and the size extracted,`
227			`2. then the read buffer is adjusted and the remaining bytes are`
228			`read in.`
229	24	jeremybenn
230	225	jeremybenn	`All file I/O is done on even file positions. */`
231	24	jeremybenn
232	225	jeremybenn	`#define VMS_OBJECT_ADJUSTMENT 2`
233
234			`static void`
235			`maybe_adjust_record_pointer_for_object (bfd *abfd)`
236			`{`
237			`/* Set the file format once for all on the first invocation. */`
238			`if (PRIV (file_format) == FF_UNKNOWN)`
239			`{`
240			`if (PRIV (vms_rec)[0] == PRIV (vms_rec)[4]`
241			`&& PRIV (vms_rec)[1] == PRIV (vms_rec)[5])`
242			`PRIV (file_format) = FF_FOREIGN;`
243			`else`
244			`PRIV (file_format) = FF_NATIVE;`
245			`}`
246
247			`/* The adjustment is needed only in an Unix environment. */`
248			`if (PRIV (file_format) == FF_FOREIGN)`
249			`PRIV (vms_rec) += VMS_OBJECT_ADJUSTMENT;`
250			`}`
251
252			`/* Get first record from file and return the file type. */`
253
254	24	jeremybenn	`int`
255	225	jeremybenn	`_bfd_vms_get_first_record (bfd *abfd)`
256	24	jeremybenn	`{`
257	225	jeremybenn	`unsigned int test_len;`
258	24	jeremybenn
259			`#if VMS_DEBUG`
260	225	jeremybenn	`vms_debug (8, "_bfd_vms_get_first_record\n");`
261	24	jeremybenn	`#endif`
262
263	225	jeremybenn	`if (PRIV (is_vax))`
264			`test_len = 0;`
265			`else`
266			`/* Minimum is 6 bytes for objects (2 bytes size, 2 bytes record id,`
267			`2 bytes size repeated) and 12 bytes for images (4 bytes major id,`
268			`4 bytes minor id, 4 bytes length). */`
269			`test_len = 12;`
270	24	jeremybenn
271	225	jeremybenn	`/* Size the main buffer. */`
272	24	jeremybenn	`if (PRIV (buf_size) == 0)`
273			`{`
274	225	jeremybenn	`/* On VAX there's no size information in the record, so`
275			`start with OBJ_S_C_MAXRECSIZ. */`
276			`bfd_size_type amt = (test_len ? test_len : OBJ_S_C_MAXRECSIZ);`
277			`PRIV (vms_buf) = (unsigned char *) bfd_malloc (amt);`
278	24	jeremybenn	`PRIV (buf_size) = amt;`
279			`}`
280
281	225	jeremybenn	`/* Initialize the record pointer. */`
282			`PRIV (vms_rec) = PRIV (vms_buf);`
283	24	jeremybenn
284	225	jeremybenn	`/* We only support modules on VAX. */`
285			`if (PRIV (is_vax))`
286	24	jeremybenn	`{`
287	225	jeremybenn	`if (vms_get_remaining_object_record (abfd, test_len) <= 0)`
288			`return FT_UNKNOWN;`
289	24	jeremybenn
290	225	jeremybenn	`#if VMS_DEBUG`
291			`vms_debug (2, "file type is VAX module\n");`
292			`#endif`
293	24	jeremybenn
294	225	jeremybenn	`return FT_MODULE;`
295	24	jeremybenn	`}`
296
297	225	jeremybenn	`if (bfd_bread (PRIV (vms_buf), test_len, abfd) != test_len)`
298			`{`
299			`bfd_set_error (bfd_error_file_truncated);`
300			`return FT_UNKNOWN;`
301			`}`
302	24	jeremybenn
303	225	jeremybenn	`/* Is it an image? */`
304			`if ((bfd_getl32 (PRIV (vms_rec)) == EIHD_S_K_MAJORID)`
305			`&& (bfd_getl32 (PRIV (vms_rec) + 4) == EIHD_S_K_MINORID))`
306	24	jeremybenn	`{`
307	225	jeremybenn	`if (vms_get_remaining_image_record (abfd, test_len) <= 0)`
308			`return FT_UNKNOWN;`
309
310			`#if VMS_DEBUG`
311			`vms_debug (2, "file type is image\n");`
312			`#endif`
313
314			`return FT_IMAGE;`
315	24	jeremybenn	`}`
316
317	225	jeremybenn	`/* Assume it's a module and adjust record pointer if necessary. */`
318			`maybe_adjust_record_pointer_for_object (abfd);`
319
320			`/* But is it really a module? */`
321			`if (bfd_getl16 (PRIV (vms_rec)) <= EOBJ_S_C_MAXRECTYP`
322			`&& bfd_getl16 (PRIV (vms_rec) + 2) <= EOBJ_S_C_MAXRECSIZ)`
323	24	jeremybenn	`{`
324	225	jeremybenn	`if (vms_get_remaining_object_record (abfd, test_len) <= 0)`
325			`return FT_UNKNOWN;`
326
327			`#if VMS_DEBUG`
328			`vms_debug (2, "file type is module\n");`
329			`#endif`
330
331			`return FT_MODULE;`
332	24	jeremybenn	`}`
333
334	225	jeremybenn	`#if VMS_DEBUG`
335			`vms_debug (2, "file type is unknown\n");`
336			`#endif`
337
338			`return FT_UNKNOWN;`
339			`}`
340
341			`/* Implement step #1 of the object record reading procedure.`
342			`Return the record type or -1 on failure. */`
343
344			`int`
345			`_bfd_vms_get_object_record (bfd *abfd)`
346			`{`
347			`unsigned int test_len;`
348			`int type;`
349
350			`#if VMS_DEBUG`
351			`vms_debug (8, "_bfd_vms_get_obj_record\n");`
352			`#endif`
353
354			`if (PRIV (is_vax))`
355			`test_len = 0;`
356			`else`
357			`{`
358			`/* See _bfd_vms_get_first_record. */`
359			`test_len = 6;`
360
361			`/* Skip odd alignment byte. */`
362			`if (bfd_tell (abfd) & 1)`
363	24	jeremybenn	`{`
364	225	jeremybenn	`if (bfd_bread (PRIV (vms_buf), 1, abfd) != 1)`
365			`{`
366			`bfd_set_error (bfd_error_file_truncated);`
367			`return -1;`
368			`}`
369	24	jeremybenn	`}`
370	225	jeremybenn
371			`/* Read the record header */`
372			`if (bfd_bread (PRIV (vms_buf), test_len, abfd) != test_len)`
373	24	jeremybenn	`{`
374	225	jeremybenn	`bfd_set_error (bfd_error_file_truncated);`
375			`return -1;`
376	24	jeremybenn	`}`
377	225	jeremybenn
378			`/* Reset the record pointer. */`
379			`PRIV (vms_rec) = PRIV (vms_buf);`
380			`maybe_adjust_record_pointer_for_object (abfd);`
381	24	jeremybenn	`}`
382
383	225	jeremybenn	`if (vms_get_remaining_object_record (abfd, test_len) <= 0)`
384			`return -1;`
385
386	24	jeremybenn	`if (PRIV (is_vax))`
387	225	jeremybenn	`type = PRIV (vms_rec) [0];`
388			`else`
389			`type = bfd_getl16 (PRIV (vms_rec));`
390
391			`#if VMS_DEBUG`
392			`vms_debug (8, "_bfd_vms_get_obj_record: rec %p, size %d, type %d\n",`
393			`PRIV (vms_rec), PRIV (rec_size), type);`
394			`#endif`
395
396			`return type;`
397			`}`
398
399			`/* Implement step #2 of the object record reading procedure.`
400			`Return the size of the record or 0 on failure. */`
401
402			`static int`
403			`vms_get_remaining_object_record (bfd *abfd, int read_so_far)`
404			`{`
405			`#if VMS_DEBUG`
406			`vms_debug (8, "vms_get_remaining_obj_record\n");`
407			`#endif`
408
409			`if (PRIV (is_vax))`
410	24	jeremybenn	`{`
411	225	jeremybenn	`if (read_so_far != 0)`
412			`abort ();`
413
414			`PRIV (rec_size) = bfd_bread (PRIV (vms_buf), PRIV (buf_size), abfd);`
415
416			`if (PRIV (rec_size) <= 0)`
417	24	jeremybenn	`{`
418			`bfd_set_error (bfd_error_file_truncated);`
419			`return 0;`
420			`}`
421	225	jeremybenn
422			`/* Reset the record pointer. */`
423			`PRIV (vms_rec) = PRIV (vms_buf);`
424	24	jeremybenn	`}`
425			`else`
426			`{`
427	225	jeremybenn	`unsigned int to_read;`
428	24	jeremybenn
429	225	jeremybenn	`/* Extract record size. */`
430			`PRIV (rec_size) = bfd_getl16 (PRIV (vms_rec) + 2);`
431	24	jeremybenn
432	225	jeremybenn	`if (PRIV (rec_size) <= 0)`
433	24	jeremybenn	`{`
434			`bfd_set_error (bfd_error_file_truncated);`
435			`return 0;`
436			`}`
437
438			`/* That's what the linker manual says. */`
439	225	jeremybenn	`if (PRIV (rec_size) > EOBJ_S_C_MAXRECSIZ)`
440	24	jeremybenn	`{`
441			`bfd_set_error (bfd_error_file_truncated);`
442			`return 0;`
443			`}`
444
445	225	jeremybenn	`/* Take into account object adjustment. */`
446			`to_read = PRIV (rec_size);`
447			`if (PRIV (file_format) == FF_FOREIGN)`
448			`to_read += VMS_OBJECT_ADJUSTMENT;`
449
450	24	jeremybenn	`/* Adjust the buffer. */`
451	225	jeremybenn	`if (to_read > PRIV (buf_size))`
452	24	jeremybenn	`{`
453	225	jeremybenn	`PRIV (vms_buf)`
454			`= (unsigned char *) bfd_realloc (PRIV (vms_buf), to_read);`
455			`if (PRIV (vms_buf) == NULL)`
456			`return 0;`
457			`PRIV (buf_size) = to_read;`
458	24	jeremybenn	`}`
459
460			`/* Read the remaining record. */`
461	225	jeremybenn	`to_read -= read_so_far;`
462	24	jeremybenn
463			`#if VMS_DEBUG`
464	225	jeremybenn	`vms_debug (8, "vms_get_remaining_obj_record: to_read %d\n", to_read);`
465	24	jeremybenn	`#endif`
466	225	jeremybenn
467			`if (bfd_bread (PRIV (vms_buf) + read_so_far, to_read, abfd) != to_read)`
468	24	jeremybenn	`{`
469			`bfd_set_error (bfd_error_file_truncated);`
470			`return 0;`
471			`}`
472	225	jeremybenn
473			`/* Reset the record pointer. */`
474			`PRIV (vms_rec) = PRIV (vms_buf);`
475			`maybe_adjust_record_pointer_for_object (abfd);`
476	24	jeremybenn	`}`
477
478			`#if VMS_DEBUG`
479	225	jeremybenn	`vms_debug (8, "vms_get_remaining_obj_record: size %d\n", PRIV (rec_size));`
480	24	jeremybenn	`#endif`
481
482	225	jeremybenn	`return PRIV (rec_size);`
483	24	jeremybenn	`}`
484
485	225	jeremybenn	`/* Implement step #2 of the record reading procedure for images.`
486			`Return the size of the record or 0 on failure. */`
487	24	jeremybenn
488	225	jeremybenn	`static int`
489			`vms_get_remaining_image_record (bfd *abfd, int read_so_far)`
490	24	jeremybenn	`{`
491	225	jeremybenn	`unsigned int to_read;`
492			`int remaining;`
493	24	jeremybenn
494	225	jeremybenn	`/* Extract record size. */`
495			`PRIV (rec_size) = bfd_getl32 (PRIV (vms_rec) + EIHD_S_L_SIZE);`
496
497			`if (PRIV (rec_size) > PRIV (buf_size))`
498	24	jeremybenn	`{`
499	225	jeremybenn	`PRIV (vms_buf) = bfd_realloc (PRIV (vms_buf), PRIV (rec_size));`
500

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