xref: /external/elfutils/backends/ppc_regs.c

/* Register names and numbers for PowerPC DWARF.
   Copyright (C) 2005, 2006, 2007 Red Hat, Inc.
   This file is part of Red Hat elfutils.

   Red Hat elfutils 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; version 2 of the License.

   Red Hat elfutils 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 Red Hat elfutils; if not, write to the Free Software Foundation,
   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.

   Red Hat elfutils is an included package of the Open Invention Network.
   An included package of the Open Invention Network is a package for which
   Open Invention Network licensees cross-license their patents.  No patent
   license is granted, either expressly or impliedly, by designation as an
   included package.  Should you wish to participate in the Open Invention
   Network licensing program, please visit www.openinventionnetwork.com
   <http://www.openinventionnetwork.com>.  */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#include <string.h>
#include <dwarf.h>

#define BACKEND ppc_
#include "libebl_CPU.h"

ssize_t
ppc_register_info (Ebl *ebl __attribute__ ((unused)),
		   int regno, char *name, size_t namelen,
		   const char **prefix, const char **setname,
		   int *bits, int *type)
{
  if (name == NULL)
    return 1156;

  if (regno < 0 || regno > 1155 || namelen < 8)
    return -1;

  *prefix = NULL;
  *bits = ebl->machine == EM_PPC64 ? 64 : 32;
  *type = (regno < 32 ? DW_ATE_signed
	   : regno < 64 ? DW_ATE_float : DW_ATE_unsigned);

  if (regno < 32 || regno == 64 || regno == 66)
    *setname = "integer";
  else if (regno < 64 || regno == 65)
    {
      *setname = "FPU";
      if (ebl->machine != EM_PPC64 && regno < 64)
	*bits = 64;
    }
  else if (regno == 67 || regno == 356 || regno == 612 || regno >= 1124)
    {
      *setname = "vector";
      *bits = regno >= 1124 ? 128 : 32;
    }
  else
    *setname = "privileged";

  switch (regno)
    {
    case 0 ... 9:
      name[0] = 'r';
      name[1] = regno + '0';
      namelen = 2;
      break;

    case 10 ... 31:
      name[0] = 'r';
      name[1] = regno / 10 + '0';
      name[2] = regno % 10 + '0';
      namelen = 3;
      break;

    case 32 + 0 ... 32 + 9:
      name[0] = 'f';
      name[1] = (regno - 32) + '0';
      namelen = 2;
      break;

    case 32 + 10 ... 32 + 31:
      name[0] = 'f';
      name[1] = (regno - 32) / 10 + '0';
      name[2] = (regno - 32) % 10 + '0';
      namelen = 3;
      break;

    case 64:
      return stpcpy (name, "cr") + 1 - name;
    case 65:
      return stpcpy (name, "fpscr") + 1 - name;
    case 66:
      return stpcpy (name, "msr") + 1 - name;
    case 67:			/* XXX unofficial assignment */
      return stpcpy (name, "vscr") + 1 - name;

    case 70 + 0 ... 70 + 9:
      name[0] = 's';
      name[1] = 'r';
      name[2] = (regno - 70) + '0';
      namelen = 3;
      break;

    case 70 + 10 ... 70 + 15:
      name[0] = 's';
      name[1] = 'r';
      name[2] = (regno - 70) / 10 + '0';
      name[3] = (regno - 70) % 10 + '0';
      namelen = 4;
      break;

    case 101:
      return stpcpy (name, "xer") + 1 - name;
    case 108:
      return stpcpy (name, "lr") + 1 - name;
    case 109:
      return stpcpy (name, "ctr") + 1 - name;
    case 118:
      return stpcpy (name, "dsisr") + 1 - name;
    case 119:
      return stpcpy (name, "dar") + 1 - name;
    case 122:
      return stpcpy (name, "dec") + 1 - name;
    case 356:
      return stpcpy (name, "vrsave") + 1 - name;
    case 612:
      return stpcpy (name, "spefscr") + 1 - name;
    case 100:
      if (*bits == 32)
	return stpcpy (name, "mq") + 1 - name;

    case 102 ... 107:
      name[0] = 's';
      name[1] = 'p';
      name[2] = 'r';
      name[3] = (regno - 100) + '0';
      namelen = 4;
      break;

    case 110 ... 117:
    case 120 ... 121:
    case 123 ... 199:
      name[0] = 's';
      name[1] = 'p';
      name[2] = 'r';
      name[3] = (regno - 100) / 10 + '0';
      name[4] = (regno - 100) % 10 + '0';
      namelen = 5;
      break;

    case 200 ... 355:
    case 357 ... 611:
    case 613 ... 999:
      name[0] = 's';
      name[1] = 'p';
      name[2] = 'r';
      name[3] = (regno - 100) / 100 + '0';
      name[4] = ((regno - 100) % 100 / 10) + '0';
      name[5] = (regno - 100) % 10 + '0';
      namelen = 6;
      break;

    case 1124 + 0 ... 1124 + 9:
      name[0] = 'v';
      name[1] = 'r';
      name[2] = (regno - 1124) + '0';
      namelen = 3;
      break;

    case 1124 + 10 ... 1124 + 31:
      name[0] = 'v';
      name[1] = 'r';
      name[2] = (regno - 1124) / 10 + '0';
      name[3] = (regno - 1124) % 10 + '0';
      namelen = 4;
      break;

    default:
      *setname = NULL;
      return 0;
    }

  name[namelen++] = '\0';
  return namelen;
}

__typeof (ppc_register_info)
     ppc64_register_info __attribute__ ((alias ("ppc_register_info")));