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/* Miscellaneous simulator utilities.

   Copyright (C) 1997, 1998, 2007, 2008, 2009, 2010

   Free Software Foundation, Inc.

   Contributed by Cygnus Support.

This file is part of GDB, the GNU debugger.

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, see <http://www.gnu.org/licenses/>.  */

#include "sim-main.h"

#include "sim-assert.h"

#ifdef HAVE_STDLIB_H

#include <stdlib.h>

#endif

#ifdef HAVE_TIME_H

#include <time.h>

#endif

#ifdef HAVE_SYS_TIME_H

#include <sys/time.h> /* needed by sys/resource.h */

#endif

#ifdef HAVE_SYS_RESOURCE_H

#include <sys/resource.h>

#endif

#ifdef HAVE_STRING_H

#include <string.h>

#else

#ifdef HAVE_STRINGS_H

#include <strings.h>

#endif

#endif

#include "libiberty.h"

#include "bfd.h"

#include "sim-utils.h"

/* Global pointer to all state data.

   Set by sim_resume.  */

struct sim_state *current_state;

/* Allocate zero filled memory with xcalloc - xcalloc aborts if the

   allocation fails.  */

void *

zalloc (unsigned long size)

{

  return xcalloc (1, size);

}

void

zfree (void *data)

{

  free (data);

}

/* Allocate a sim_state struct.  */

SIM_DESC

sim_state_alloc (SIM_OPEN_KIND kind,

                 host_callback *callback)

{

  SIM_DESC sd = ZALLOC (struct sim_state);

  STATE_MAGIC (sd) = SIM_MAGIC_NUMBER;

  STATE_CALLBACK (sd) = callback;

  STATE_OPEN_KIND (sd) = kind;

#if 0

  {

    int cpu_nr;

    /* Initialize the back link from the cpu struct to the state struct.  */

    /* ??? I can envision a design where the state struct contains an array

       of pointers to cpu structs, rather than an array of structs themselves.

       Implementing this is trickier as one may not know what to allocate until

       one has parsed the args.  Parsing the args twice wouldn't be unreasonable,

       IMHO.  If the state struct ever does contain an array of pointers then we

       can't do this here.

       ??? See also sim_post_argv_init*/

    for (cpu_nr = 0; cpu_nr < MAX_NR_PROCESSORS; cpu_nr++)

      {

        CPU_STATE (STATE_CPU (sd, cpu_nr)) = sd;

        CPU_INDEX (STATE_CPU (sd, cpu_nr)) = cpu_nr;

      }

  }

#endif

#ifdef SIM_STATE_INIT

  SIM_STATE_INIT (sd);

#endif

  return sd;

}

/* Free a sim_state struct.  */

void

sim_state_free (SIM_DESC sd)

{

  ASSERT (sd->base.magic == SIM_MAGIC_NUMBER);

#ifdef SIM_STATE_FREE

  SIM_STATE_FREE (sd);

#endif

  zfree (sd);

}

/* Return a pointer to the cpu data for CPU_NAME, or NULL if not found.  */

sim_cpu *

sim_cpu_lookup (SIM_DESC sd, const char *cpu_name)

{

  int i;

  for (i = 0; i < MAX_NR_PROCESSORS; ++i)

    if (strcmp (cpu_name, CPU_NAME (STATE_CPU (sd, i))) == 0)

      return STATE_CPU (sd, i);

  return NULL;

}

/* Return the prefix to use for a CPU specific message (typically an

   error message).  */

const char *

sim_cpu_msg_prefix (sim_cpu *cpu)

{

#if MAX_NR_PROCESSORS == 1

  return "";

#else

  static char *prefix;

  if (prefix == NULL)

    {

      int maxlen = 0;

      for (i = 0; i < MAX_NR_PROCESSORS; ++i)

        {

          int len = strlen (CPU_NAME (STATE_CPU (sd, i)));

          if (len > maxlen)

            maxlen = len;

        }

      prefix = (char *) xmalloc (maxlen + 5);

    }

  sprintf (prefix, "%s: ", CPU_NAME (cpu));

  return prefix;

#endif

}

/* Cover fn to sim_io_eprintf.  */

void

sim_io_eprintf_cpu (sim_cpu *cpu, const char *fmt, ...)

{

  SIM_DESC sd = CPU_STATE (cpu);

  va_list ap;

  va_start (ap, fmt);

  sim_io_eprintf (sd, sim_cpu_msg_prefix (cpu));

  sim_io_evprintf (sd, fmt, ap);

  va_end (ap);

}

/* Turn VALUE into a string with commas.  */

char *

sim_add_commas (char *buf, int sizeof_buf, unsigned long value)

{

  int comma = 3;

  char *endbuf = buf + sizeof_buf - 1;

  *--endbuf = '\0';

  do {

    if (comma-- == 0)

      {

        *--endbuf = ',';

        comma = 2;

      }

    *--endbuf = (value % 10) + '0';

  } while ((value /= 10) != 0);

  return endbuf;

}

/* Analyze PROG_NAME/PROG_BFD and set these fields in the state struct:

   STATE_ARCHITECTURE, if not set already and can be determined from the bfd

   STATE_PROG_BFD

   STATE_START_ADDR

   STATE_TEXT_SECTION

   STATE_TEXT_START

   STATE_TEXT_END

   PROG_NAME is the file name of the executable or NULL.

   PROG_BFD is its bfd or NULL.

   If both PROG_NAME and PROG_BFD are NULL, this function returns immediately.

   If PROG_BFD is not NULL, PROG_NAME is ignored.

   Implicit inputs: STATE_MY_NAME(sd), STATE_TARGET(sd),

                    STATE_ARCHITECTURE(sd).

   A new bfd is created so the app isn't required to keep its copy of the

   bfd open.  */

SIM_RC

sim_analyze_program (sd, prog_name, prog_bfd)

     SIM_DESC sd;

     char *prog_name;

     bfd *prog_bfd;

{

  asection *s;

  SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);

  if (prog_bfd != NULL)

    {

      if (prog_bfd == STATE_PROG_BFD (sd))

        /* already analyzed */

        return SIM_RC_OK;

      else

        /* duplicate needed, save the name of the file to be re-opened */

        prog_name = bfd_get_filename (prog_bfd);

    }

  /* do we need to duplicate anything? */

  if (prog_name == NULL)

    return SIM_RC_OK;

  /* open a new copy of the prog_bfd */

  prog_bfd = bfd_openr (prog_name, STATE_TARGET (sd));

  if (prog_bfd == NULL)

    {

      sim_io_eprintf (sd, "%s: can't open \"%s\": %s\n",

                      STATE_MY_NAME (sd),

                      prog_name,

                      bfd_errmsg (bfd_get_error ()));

      return SIM_RC_FAIL;

    }

  if (!bfd_check_format (prog_bfd, bfd_object))

    {

      sim_io_eprintf (sd, "%s: \"%s\" is not an object file: %s\n",

                      STATE_MY_NAME (sd),

                      prog_name,

                      bfd_errmsg (bfd_get_error ()));

      bfd_close (prog_bfd);

      return SIM_RC_FAIL;

    }

  if (STATE_ARCHITECTURE (sd) != NULL)

    bfd_set_arch_info (prog_bfd, STATE_ARCHITECTURE (sd));

  else

    {

      if (bfd_get_arch (prog_bfd) != bfd_arch_unknown

          && bfd_get_arch (prog_bfd) != bfd_arch_obscure)

        {

          STATE_ARCHITECTURE (sd) = bfd_get_arch_info (prog_bfd);

        }

    }

  /* update the sim structure */

  if (STATE_PROG_BFD (sd) != NULL)

    bfd_close (STATE_PROG_BFD (sd));

  STATE_PROG_BFD (sd) = prog_bfd;

  STATE_START_ADDR (sd) = bfd_get_start_address (prog_bfd);

  for (s = prog_bfd->sections; s; s = s->next)

    if (strcmp (bfd_get_section_name (prog_bfd, s), ".text") == 0)

      {

        STATE_TEXT_SECTION (sd) = s;

        STATE_TEXT_START (sd) = bfd_get_section_vma (prog_bfd, s);

        STATE_TEXT_END (sd) = STATE_TEXT_START (sd) + bfd_section_size (prog_bfd, s);

        break;

      }

  bfd_cache_close (prog_bfd);

  return SIM_RC_OK;

}

/* Simulator timing support.  */

/* Called before sim_elapsed_time_since to get a reference point.  */

SIM_ELAPSED_TIME

sim_elapsed_time_get ()

{

#ifdef HAVE_GETRUSAGE

  struct rusage mytime;

  if (getrusage (RUSAGE_SELF, &mytime) == 0)

    return 1 + (SIM_ELAPSED_TIME) (((double) mytime.ru_utime.tv_sec * 1000) + (((double) mytime.ru_utime.tv_usec + 500) / 1000));

  return 1;

#else

#ifdef HAVE_TIME

  return 1 + (SIM_ELAPSED_TIME) time ((time_t) 0);

#else

  return 1;

#endif

#endif

}

/* Return the elapsed time in milliseconds since START.

   The actual time may be cpu usage (preferred) or wall clock.  */

unsigned long

sim_elapsed_time_since (start)

     SIM_ELAPSED_TIME start;

{

#ifdef HAVE_GETRUSAGE

  return sim_elapsed_time_get () - start;

#else

#ifdef HAVE_TIME

  return (sim_elapsed_time_get () - start) * 1000;

#else

  return 0;

#endif

#endif

}

/* do_command but with printf style formatting of the arguments */

void

sim_do_commandf (SIM_DESC sd,

                 const char *fmt,

                 ...)

{

  va_list ap;

  char *buf;

  va_start (ap, fmt);

  vasprintf (&buf, fmt, ap);

  sim_do_command (sd, buf);

  va_end (ap);

  free (buf);

}

/* sim-basics.h defines a number of enumerations, convert each of them

   to a string representation */

const char *

map_to_str (unsigned map)

{

  switch (map)

    {

    case read_map: return "read";

    case write_map: return "write";

    case exec_map: return "exec";

    case io_map: return "io";

    default:

      {

        static char str[10];

        sprintf (str, "(%ld)", (long) map);

        return str;

      }

    }

}

const char *

access_to_str (unsigned access)

{

  switch (access)

    {

    case access_invalid: return "invalid";

    case access_read: return "read";

    case access_write: return "write";

    case access_exec: return "exec";

    case access_io: return "io";

    case access_read_write: return "read_write";

    case access_read_exec: return "read_exec";

    case access_write_exec: return "write_exec";

    case access_read_write_exec: return "read_write_exec";

    case access_read_io: return "read_io";

    case access_write_io: return "write_io";

    case access_read_write_io: return "read_write_io";

    case access_exec_io: return "exec_io";

    case access_read_exec_io: return "read_exec_io";

    case access_write_exec_io: return "write_exec_io";

    case access_read_write_exec_io: return "read_write_exec_io";

    default:

      {

        static char str[10];

        sprintf (str, "(%ld)", (long) access);

        return str;

      }

    }

}

const char *

transfer_to_str (unsigned transfer)

{

  switch (transfer)

    {

    case read_transfer: return "read";

    case write_transfer: return "write";

    default: return "(error)";

    }

}