vms-gsd.c

基于4个mips核的noc设计

/* vms-gsd.c -- BFD back-end for VAX (openVMS/VAX) and
   EVAX (openVMS/Alpha) files.
   Copyright 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.

   go and read the openVMS linker manual (esp. appendix B)
   if you don't know what's going on here :-)

   Written by Klaus K"ampf ([e-mail])

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.  */

#include <ctype.h>

#include "bfd.h"
#include "sysdep.h"
#include "bfdlink.h"
#include "libbfd.h"

#include "vms.h"

/*-----------------------------------------------------------------------------*/

/* typical sections for vax object files  */

#define VAX_CODE_NAME		"$CODE"
#define VAX_DATA_NAME		"$DATA"
#define VAX_ADDRESS_DATA_NAME	"$ADDRESS_DATA"

/* typical sections for evax object files  */

#define EVAX_ABS_NAME		"$ABS$"
#define EVAX_CODE_NAME		"$CODE$"
#define EVAX_LINK_NAME		"$LINK$"
#define EVAX_DATA_NAME		"$DATA$"
#define EVAX_BSS_NAME		"$BSS$"
#define EVAX_READONLYADDR_NAME	"$READONLY_ADDR$"
#define EVAX_READONLY_NAME	"$READONLY$"
#define EVAX_LITERAL_NAME	"$LITERAL$"
#define EVAX_COMMON_NAME	"$COMMON$"
#define EVAX_LOCAL_NAME		"$LOCAL$"

struct sec_flags_struct {
  char *name;			/* name of section */
  int vflags_always;
  flagword flags_always;	/* flags we set always */
  int vflags_hassize;
  flagword flags_hassize;	/* flags we set if the section has a size > 0 */
};

/* These flags are deccrtl/vaxcrtl (openVMS 6.2 VAX) compatible  */

static struct sec_flags_struct vax_section_flags[] = {
  { VAX_CODE_NAME,
	(GPS_S_M_PIC|GPS_S_M_REL|GPS_S_M_SHR|GPS_S_M_EXE|GPS_S_M_RD),
	(SEC_CODE),
	(GPS_S_M_PIC|GPS_S_M_REL|GPS_S_M_SHR|GPS_S_M_EXE|GPS_S_M_RD),
	(SEC_IN_MEMORY|SEC_CODE|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_LOAD) },
  { VAX_DATA_NAME,
	(GPS_S_M_PIC|GPS_S_M_REL|GPS_S_M_RD|GPS_S_M_WRT),
	(SEC_DATA),
	(GPS_S_M_PIC|GPS_S_M_REL|GPS_S_M_RD|GPS_S_M_WRT),
	(SEC_IN_MEMORY|SEC_DATA|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_LOAD) },
  { VAX_ADDRESS_DATA_NAME,
	(GPS_S_M_PIC|GPS_S_M_REL|GPS_S_M_RD),
	(SEC_DATA|SEC_READONLY),
	(GPS_S_M_PIC|GPS_S_M_REL|GPS_S_M_RD),
	(SEC_IN_MEMORY|SEC_DATA|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_READONLY|SEC_LOAD) },
  { NULL,
	(GPS_S_M_PIC|GPS_S_M_OVR|GPS_S_M_REL|GPS_S_M_GBL|GPS_S_M_RD|GPS_S_M_WRT),
	(SEC_DATA),
	(GPS_S_M_PIC|GPS_S_M_OVR|GPS_S_M_REL|GPS_S_M_GBL|GPS_S_M_RD|GPS_S_M_WRT),
	(SEC_IN_MEMORY|SEC_DATA|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_LOAD) }
};

/* These flags are deccrtl/vaxcrtl (openVMS 6.2 Alpha) compatible  */

static struct sec_flags_struct evax_section_flags[] = {
  { EVAX_ABS_NAME,
	(EGPS_S_V_SHR),
	(SEC_DATA),
	(EGPS_S_V_SHR),
	(SEC_IN_MEMORY|SEC_DATA|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_LOAD) },
  { EVAX_CODE_NAME,
	(EGPS_S_V_PIC|EGPS_S_V_REL|EGPS_S_V_SHR|EGPS_S_V_EXE),
	(SEC_CODE),
	(EGPS_S_V_PIC|EGPS_S_V_REL|EGPS_S_V_SHR|EGPS_S_V_EXE),
	(SEC_IN_MEMORY|SEC_CODE|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_LOAD) },
  { EVAX_LITERAL_NAME,
	(EGPS_S_V_PIC|EGPS_S_V_REL|EGPS_S_V_SHR|EGPS_S_V_RD|EGPS_S_V_NOMOD),
	(SEC_DATA|SEC_READONLY),
	(EGPS_S_V_PIC|EGPS_S_V_REL|EGPS_S_V_SHR|EGPS_S_V_RD),
	(SEC_IN_MEMORY|SEC_DATA|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_READONLY|SEC_LOAD) },
  { EVAX_LINK_NAME,
	(EGPS_S_V_REL|EGPS_S_V_RD),
	(SEC_DATA|SEC_READONLY),
	(EGPS_S_V_REL|EGPS_S_V_RD),
	(SEC_IN_MEMORY|SEC_DATA|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_READONLY|SEC_LOAD) },
  { EVAX_DATA_NAME,
	(EGPS_S_V_REL|EGPS_S_V_RD|EGPS_S_V_WRT|EGPS_S_V_NOMOD),
	(SEC_DATA),
	(EGPS_S_V_REL|EGPS_S_V_RD|EGPS_S_V_WRT),
	(SEC_IN_MEMORY|SEC_DATA|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_LOAD) },
  { EVAX_BSS_NAME,
	(EGPS_S_V_REL|EGPS_S_V_RD|EGPS_S_V_WRT|EGPS_S_V_NOMOD),
	(SEC_NO_FLAGS),
	(EGPS_S_V_REL|EGPS_S_V_RD|EGPS_S_V_WRT|EGPS_S_V_NOMOD),
	(SEC_IN_MEMORY|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_LOAD) },
  { EVAX_READONLYADDR_NAME,
	(EGPS_S_V_PIC|EGPS_S_V_REL|EGPS_S_V_RD),
	(SEC_DATA|SEC_READONLY),
	(EGPS_S_V_PIC|EGPS_S_V_REL|EGPS_S_V_RD),
	(SEC_IN_MEMORY|SEC_DATA|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_READONLY|SEC_LOAD) },
  { EVAX_READONLY_NAME,
	(EGPS_S_V_PIC|EGPS_S_V_REL|EGPS_S_V_SHR|EGPS_S_V_RD|EGPS_S_V_NOMOD),
	(SEC_DATA|SEC_READONLY),
	(EGPS_S_V_PIC|EGPS_S_V_REL|EGPS_S_V_SHR|EGPS_S_V_RD),
	(SEC_IN_MEMORY|SEC_DATA|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_READONLY|SEC_LOAD) },
  { EVAX_LOCAL_NAME,
	(EGPS_S_V_REL|EGPS_S_V_RD|EGPS_S_V_WRT),
	(SEC_DATA),
	(EGPS_S_V_REL|EGPS_S_V_RD|EGPS_S_V_WRT),
	(SEC_IN_MEMORY|SEC_DATA|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_LOAD) },
  { NULL,
	(EGPS_S_V_REL|EGPS_S_V_RD|EGPS_S_V_WRT),
	(SEC_DATA),
	(EGPS_S_V_REL|EGPS_S_V_RD|EGPS_S_V_WRT),
	(SEC_IN_MEMORY|SEC_DATA|SEC_HAS_CONTENTS|SEC_ALLOC|SEC_LOAD) }
};

/* Retrieve bfd section flags by name and size  */

static flagword
vms_secflag_by_name (abfd, section_flags, name, size)
     bfd *abfd;
     struct sec_flags_struct *section_flags;
     char *name;
     int size;
{
  int i = 0;

  while (section_flags[i].name != NULL)
    {
      if ((PRIV(is_vax)?
	    strcasecmp (name, section_flags[i].name):
	    strcmp (name, section_flags[i].name)) == 0)
	{
	  if (size > 0)
	    return section_flags[i].flags_hassize;
	  else
	    return section_flags[i].flags_always;
	}
      i++;
    }
  if (size > 0)
    return section_flags[i].flags_hassize;
  return section_flags[i].flags_always;
}

/* Retrieve vms section flags by name and size  */

static flagword
vms_esecflag_by_name (section_flags, name, size)
     struct sec_flags_struct *section_flags;
     char *name;
     int size;
{
  int i = 0;

  while (section_flags[i].name != NULL)
    {
      if (strcmp (name, section_flags[i].name) == 0)
	{
	  if (size > 0)
	    return section_flags[i].vflags_hassize;
	  else
	    return section_flags[i].vflags_always;
	}
      i++;
    }
  if (size > 0)
    return section_flags[i].vflags_hassize;
  return section_flags[i].vflags_always;
}

/*-----------------------------------------------------------------------------*/
#if VMS_DEBUG
/* debug */

struct flagdescstruct { char *name; flagword value; };

/* Convert flag to printable string  */

static char *
flag2str(flagdesc, flags)
     struct flagdescstruct *flagdesc;
     flagword flags;
{

  static char res[64];
  int next = 0;

  res[0] = 0;
  while (flagdesc->name != NULL)
    {
      if ((flags & flagdesc->value) != 0)
	{
	  if (next)
	    strcat(res, ",");
	  else
	    next = 1;
	  strcat (res, flagdesc->name);
	}
      flagdesc++;
    }
  return res;
}
#endif

/*-----------------------------------------------------------------------------*/
/* input routines */

/* Process GSD/EGSD record
   return 0 on success, -1 on error  */

int
_bfd_vms_slurp_gsd (abfd, objtype)
     bfd *abfd;
     int objtype;
{
#if VMS_DEBUG
  static struct flagdescstruct gpsflagdesc[] =
  {
    { "PIC", 0x0001 },
    { "LIB", 0x0002 },
    { "OVR", 0x0004 },
    { "REL", 0x0008 },
    { "GBL", 0x0010 },
    { "SHR", 0x0020 },
    { "EXE", 0x0040 },
    { "RD",  0x0080 },
    { "WRT", 0x0100 },
    { "VEC", 0x0200 },
    { "NOMOD", 0x0400 },
    { "COM", 0x0800 },
    { NULL, 0 }
  };

  static struct flagdescstruct gsyflagdesc[] =
  {
    { "WEAK", 0x0001 },
    { "DEF",  0x0002 },
    { "UNI",  0x0004 },
    { "REL",  0x0008 },
    { "COMM", 0x0010 },
    { "VECEP", 0x0020 },
    { "NORM", 0x0040 },
    { NULL, 0 }
  };
#endif

  int gsd_type, gsd_size;
  asection *section;
  unsigned char *vms_rec;
  flagword new_flags, old_flags;
  char *name;
  asymbol *symbol;
  vms_symbol_entry *entry;
  unsigned long base_addr;
  unsigned long align_addr;
  static unsigned int psect_idx = 0;

#if VMS_DEBUG
  vms_debug (2, "GSD/EGSD (%d/%x)\n", objtype, objtype);
#endif

  switch (objtype)
    {
      case EOBJ_S_C_EGSD:
 	PRIV(vms_rec) += 8;	/* skip type, size, l_temp */
	PRIV(rec_size) -= 8;
	break;
      case OBJ_S_C_GSD:
	PRIV(vms_rec) += 1;
	PRIV(rec_size) -= 1;
	break;
      default:
	return -1;
    }

  /* calculate base address for each section  */
  base_addr = 0L;

  abfd->symcount = 0;

  while (PRIV(rec_size) > 0)
    {
      vms_rec = PRIV(vms_rec);

      if (objtype == OBJ_S_C_GSD)
	{
	  gsd_type = *vms_rec;
	}
      else
	{
	  _bfd_vms_get_header_values (abfd, vms_rec, &gsd_type, &gsd_size);
	  gsd_type += EVAX_OFFSET;
	}

#if VMS_DEBUG
  vms_debug (3, "gsd_type %d\n", gsd_type);
#endif

      switch (gsd_type)
	{
	  case GSD_S_C_PSC:
	    {
	      /*
	       * program section definition
	       */

	      asection *old_section = 0;

#if VMS_DEBUG
  vms_debug (4, "GSD_S_C_PSC\n");
#endif
	      /* If this section isn't a bfd section.  */

	      if (PRIV(is_vax) && (psect_idx < (abfd->section_count-1)))
		{
		  /* check for temporary section from TIR record.  */

		  if (psect_idx < PRIV(section_count))
		    old_section = PRIV(sections)[psect_idx];
		  else
		    old_section = 0;
		}

	      name = _bfd_vms_save_counted_string (vms_rec + 8);
	      section = bfd_make_section (abfd, name);
	      if (!section)
		{
		  (*_bfd_error_handler) (_("bfd_make_section (%s) failed"),
					 name);
		  return -1;
		}
	      old_flags = bfd_getl16 (vms_rec + 2);
	      section->_raw_size = bfd_getl32(vms_rec + 4);	/* allocation */
	      new_flags = vms_secflag_by_name (abfd, vax_section_flags, name, section->_raw_size);
	      if (old_flags & EGPS_S_V_REL)
		new_flags |= SEC_RELOC;
	      if (old_flags & GPS_S_M_OVR)
		new_flags |= SEC_IS_COMMON;
	      if (!bfd_set_section_flags (abfd, section, new_flags))
		{
		  (*_bfd_error_handler)
		    (_("bfd_set_section_flags (%s, %x) failed"),
		     name, new_flags);
		  return -1;
		}
	      section->alignment_power = vms_rec[1];
	      align_addr = (1 << section->alignment_power);
	      if ((base_addr % align_addr) != 0)
		base_addr += (align_addr - (base_addr % align_addr));
	      section->vma = (bfd_vma)base_addr;
	      base_addr += section->_raw_size;

	      /* global section is common symbol  */

	      if (old_flags & GPS_S_M_GBL)
		{
		  entry = _bfd_vms_enter_symbol (abfd, name);
		  if (entry == (vms_symbol_entry *)NULL)
		    {
		      bfd_set_error (bfd_error_no_memory);
		      return -1;
		    }
		  symbol = entry->symbol;

		  symbol->value = 0;
		  symbol->section = section;
		  symbol->flags = (BSF_GLOBAL|BSF_SECTION_SYM|BSF_OLD_COMMON);
		}

	      /* copy saved contents if old_section set  */

	      if (old_section != 0)
		{
		  section->contents = old_section->contents;
		  if (section->_raw_size < old_section->_raw_size)
		    {
		      (*_bfd_error_handler)
			(_("Size mismatch section %s=%lx, %s=%lx"),
			 old_section->name,
			 (unsigned long) old_section->_raw_size,
			 section->name,
			 (unsigned long) section->_raw_size);
		      return -1;
		    }
		  else if (section->_raw_size > old_section->_raw_size)
		    {
		      section->contents = ((unsigned char *)
				    bfd_realloc (old_section->contents, section->_raw_size));
		      if (section->contents == NULL)
			{
			  bfd_set_error (bfd_error_no_memory);
			  return -1;
		        }
		    }
		}
	      else
		{
		  section->contents = ((unsigned char *)
					bfd_malloc (section->_raw_size));
		  if (section->contents == NULL)
		    {
		      bfd_set_error (bfd_error_no_memory);
		      return -1;
		    }
		  memset (section->contents, 0, (size_t)section->_raw_size);
		}
	      section->_cooked_size = section->_raw_size;
#if VMS_DEBUG
	      vms_debug (4, "gsd psc %d (%s, flags %04x=%s) ",
			 section->index, name, old_flags, flag2str (gpsflagdesc, old_flags));
	      vms_debug (4, "%d bytes at 0x%08lx (mem %p)\n",
			 section->_raw_size, section->vma, section->contents);
#endif

	      gsd_size = vms_rec[8] + 9;

	      psect_idx++;
	    }
	  break;

	  case GSD_S_C_EPM:
	  case GSD_S_C_EPMW:
#if VMS_DEBUG
		vms_debug(4, "gsd epm\n");
#endif
	  /*FALLTHRU*/
	  case GSD_S_C_SYM:
	  case GSD_S_C_SYMW:
	    {
	      int name_offset, value_offset;

	      /*
	       * symbol specification (definition or reference)
	       */

#if VMS_DEBUG
  vms_debug (4, "GSD_S_C_SYM(W)\n");