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[/] [or1k/] [tags/] [final_interface/] [gdb-5.0/] [sim/] [common/] [callback.c] - Blame information for rev 1765

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/* Remote target callback routines.
   Copyright 1995, 1996, 1997 Free Software Foundation, Inc.
   Contributed by Cygnus Solutions.
 
   This file is part of GDB.
 
   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 GAS; see the file COPYING.  If not, write to the Free Software
   Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
 
/* This file provides a standard way for targets to talk to the host OS
   level.  */
 
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "ansidecl.h"
#ifdef ANSI_PROTOTYPES
#include <stdarg.h>
#else
#include <varargs.h>
#endif
#include <stdio.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#else
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#endif
#include <errno.h>
#include <fcntl.h>
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "callback.h"
#include "targ-vals.h"
 
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
 
/* ??? sim_cb_printf should be cb_printf, but until the callback support is
   broken out of the simulator directory, these are here to not require
   sim-utils.h.  */
void sim_cb_printf PARAMS ((host_callback *, const char *, ...));
void sim_cb_eprintf PARAMS ((host_callback *, const char *, ...));
 
extern CB_TARGET_DEFS_MAP cb_init_syscall_map[];
extern CB_TARGET_DEFS_MAP cb_init_errno_map[];
extern CB_TARGET_DEFS_MAP cb_init_open_map[];
 
extern int system PARAMS ((const char *));
 
static int os_init PARAMS ((host_callback *));
static int os_shutdown PARAMS ((host_callback *));
static int os_unlink PARAMS ((host_callback *, const char *));
static long os_time PARAMS ((host_callback *, long *));
static int os_system PARAMS ((host_callback *, const char *));
static int os_rename PARAMS ((host_callback *, const char *, const char *));
static int os_write_stdout PARAMS ((host_callback *, const char *, int));
static void os_flush_stdout PARAMS ((host_callback *));
static int os_write_stderr PARAMS ((host_callback *, const char *, int));
static void os_flush_stderr PARAMS ((host_callback *));
static int os_write PARAMS ((host_callback *, int, const char *, int));
static int os_read_stdin PARAMS ((host_callback *, char *, int));
static int os_read PARAMS ((host_callback *, int, char *, int));
static int os_open PARAMS ((host_callback *, const char *, int));
static int os_lseek PARAMS ((host_callback *, int, long, int));
static int os_isatty PARAMS ((host_callback *, int));
static int os_get_errno PARAMS ((host_callback *));
static int os_close PARAMS ((host_callback *, int));
static void os_vprintf_filtered PARAMS ((host_callback *, const char *, va_list));
static void os_evprintf_filtered PARAMS ((host_callback *, const char *, va_list));
static void os_error PARAMS ((host_callback *, const char *, ...));
static int fdmap PARAMS ((host_callback *, int));
static int fdbad PARAMS ((host_callback *, int));
static int wrap PARAMS ((host_callback *, int));
 
/* Set the callback copy of errno from what we see now.  */
 
static int
wrap (p, val)
     host_callback *p;
     int val;
{
  p->last_errno = errno;
  return val;
}
 
/* Make sure the FD provided is ok.  If not, return non-zero
   and set errno. */
 
static int
fdbad (p, fd)
     host_callback *p;
     int fd;
{
  if (fd < 0 || fd > MAX_CALLBACK_FDS || !p->fdopen[fd])
    {
      p->last_errno = EINVAL;
      return -1;
    }
  return 0;
}
 
static int
fdmap (p, fd)
     host_callback *p;
     int fd;
{
  return p->fdmap[fd];
}
 
static int
os_close (p, fd)
     host_callback *p;
     int fd;
{
  int result;
 
  result = fdbad (p, fd);
  if (result)
    return result;
  result = wrap (p, close (fdmap (p, fd)));
  if (result == 0 && !p->alwaysopen[fd])
    p->fdopen[fd] = 0;
 
  return result;
}
 
 
/* taken from gdb/util.c:notice_quit() - should be in a library */
 
 
#if defined(__GO32__) || defined (_MSC_VER)
static int
os_poll_quit (p)
     host_callback *p;
{
#if defined(__GO32__)
  int kbhit ();
  int getkey ();
  if (kbhit ())
    {
      int k = getkey ();
      if (k == 1)
        {
          return 1;
        }
      else if (k == 2)
        {
          return 1;
        }
      else
        {
          sim_cb_eprintf (p, "CTRL-A to quit, CTRL-B to quit harder\n");
        }
    }
#endif
#if defined (_MSC_VER)
  /* NB - this will not compile! */
  int k = win32pollquit();
  if (k == 1)
    return 1;
  else if (k == 2)
    return 1;
#endif
  return 0;
}
#else
#define os_poll_quit 0
#endif /* defined(__GO32__) || defined(_MSC_VER) */
 
static int
os_get_errno (p)
     host_callback *p;
{
  return cb_host_to_target_errno (p, p->last_errno);
}
 
 
static int
os_isatty (p, fd)
     host_callback *p;
     int fd;
{
  int result;
 
  result = fdbad (p, fd);
  if (result)
    return result;
  result = wrap (p, isatty (fdmap (p, fd)));
 
  return result;
}
 
static int
os_lseek (p, fd, off, way)
     host_callback *p;
     int fd;
     long off;
     int way;
{
  int result;
 
  result = fdbad (p, fd);
  if (result)
    return result;
  result = lseek (fdmap (p, fd), off, way);
  return result;
}
 
static int
os_open (p, name, flags)
     host_callback *p;
     const char *name;
     int flags;
{
  int i;
  for (i = 0; i < MAX_CALLBACK_FDS; i++)
    {
      if (!p->fdopen[i])
        {
          int f = open (name, cb_target_to_host_open (p, flags), 0644);
          if (f < 0)
            {
              p->last_errno = errno;
              return f;
            }
          p->fdopen[i] = 1;
          p->fdmap[i] = f;
          return i;
        }
    }
  p->last_errno = EMFILE;
  return -1;
}
 
static int
os_read (p, fd, buf, len)
     host_callback *p;
     int fd;
     char *buf;
     int len;
{
  int result;
 
  result = fdbad (p, fd);
  if (result)
    return result;
  result = wrap (p, read (fdmap (p, fd), buf, len));
  return result;
}
 
static int
os_read_stdin (p, buf, len)
     host_callback *p;
     char *buf;
     int len;
{
  return wrap (p, read (0, buf, len));
}
 
static int
os_write (p, fd, buf, len)
     host_callback *p;
     int fd;
     const char *buf;
     int len;
{
  int result;
  int real_fd;
 
  result = fdbad (p, fd);
  if (result)
    return result;
  real_fd = fdmap (p, fd);
  switch (real_fd)
    {
    default:
      result = wrap (p, write (real_fd, buf, len));
      break;
    case 1:
      result = p->write_stdout (p, buf, len);
      break;
    case 2:
      result = p->write_stderr (p, buf, len);
      break;
    }
  return result;
}
 
static int
os_write_stdout (p, buf, len)
     host_callback *p ATTRIBUTE_UNUSED;
     const char *buf;
     int len;
{
  return fwrite (buf, 1, len, stdout);
}
 
static void
os_flush_stdout (p)
     host_callback *p ATTRIBUTE_UNUSED;
{
  fflush (stdout);
}
 
static int
os_write_stderr (p, buf, len)
     host_callback *p ATTRIBUTE_UNUSED;
     const char *buf;
     int len;
{
  return fwrite (buf, 1, len, stderr);
}
 
static void
os_flush_stderr (p)
     host_callback *p ATTRIBUTE_UNUSED;
{
  fflush (stderr);
}
 
static int
os_rename (p, f1, f2)
     host_callback *p;
     const char *f1;
     const char *f2;
{
  return wrap (p, rename (f1, f2));
}
 
 
static int
os_system (p, s)
     host_callback *p;
     const char *s;
{
  return wrap (p, system (s));
}
 
static long
os_time (p, t)
     host_callback *p;
     long *t;
{
  return wrap (p, time (t));
}
 
 
static int
os_unlink (p, f1)
     host_callback *p;
     const char *f1;
{
  return wrap (p, unlink (f1));
}
 
static int
os_stat (p, file, buf)
     host_callback *p;
     const char *file;
     struct stat *buf;
{
  /* ??? There is an issue of when to translate to the target layout.
     One could do that inside this function, or one could have the
     caller do it.  It's more flexible to let the caller do it, though
     I'm not sure the flexibility will ever be useful.  */
  return wrap (p, stat (file, buf));
}
 
static int
os_fstat (p, fd, buf)
     host_callback *p;
     int fd;
     struct stat *buf;
{
  if (fdbad (p, fd))
    return -1;
  /* ??? There is an issue of when to translate to the target layout.
     One could do that inside this function, or one could have the
     caller do it.  It's more flexible to let the caller do it, though
     I'm not sure the flexibility will ever be useful.  */
  return wrap (p, fstat (fdmap (p, fd), buf));
}
 
static int
os_shutdown (p)
     host_callback *p;
{
  int i;
  for (i = 0; i < MAX_CALLBACK_FDS; i++)
    {
      if (p->fdopen[i] && !p->alwaysopen[i]) {
        close (p->fdmap[i]);
        p->fdopen[i] = 0;
      }
    }
  return 1;
}
 
static int
os_init (p)
     host_callback *p;
{
  int i;
 
  os_shutdown (p);
  for (i = 0; i < 3; i++)
    {
      p->fdmap[i] = i;
      p->fdopen[i] = 1;
      p->alwaysopen[i] = 1;
    }
 
  p->syscall_map = cb_init_syscall_map;
  p->errno_map = cb_init_errno_map;
  p->open_map = cb_init_open_map;
 
  return 1;
}
 
/* DEPRECIATED */
 
/* VARARGS */
static void
#ifdef ANSI_PROTOTYPES
os_printf_filtered (host_callback *p ATTRIBUTE_UNUSED, const char *format, ...)
#else
os_printf_filtered (p, va_alist)
     host_callback *p;
     va_dcl
#endif
{
  va_list args;
#ifdef ANSI_PROTOTYPES
  va_start (args, format);
#else
  char *format;
 
  va_start (args);
  format = va_arg (args, char *);
#endif
 
  vfprintf (stdout, format, args);
  va_end (args);
}
 
/* VARARGS */
static void
#ifdef ANSI_PROTOTYPES
os_vprintf_filtered (host_callback *p ATTRIBUTE_UNUSED, const char *format, va_list args)
#else
os_vprintf_filtered (p, format, args)
     host_callback *p;
     const char *format;
     va_list args;
#endif
{
  vprintf (format, args);
}
 
/* VARARGS */
static void
#ifdef ANSI_PROTOTYPES
os_evprintf_filtered (host_callback *p ATTRIBUTE_UNUSED, const char *format, va_list args)
#else
os_evprintf_filtered (p, format, args)
     host_callback *p;
     const char *format;
     va_list args;
#endif
{
  vfprintf (stderr, format, args);
}
 
/* VARARGS */
static void
#ifdef ANSI_PROTOTYPES
os_error (host_callback *p ATTRIBUTE_UNUSED, const char *format, ...)
#else
os_error (p, va_alist)
     host_callback *p;
     va_dcl
#endif
{
  va_list args;
#ifdef ANSI_PROTOTYPES
  va_start (args, format);
#else
  char *format;
 
  va_start (args);
  format = va_arg (args, char *);
#endif
 
  vfprintf (stderr, format, args);
  fprintf (stderr, "\n");
 
  va_end (args);
  exit (1);
}
 
host_callback default_callback =
{
  os_close,
  os_get_errno,
  os_isatty,
  os_lseek,
  os_open,
  os_read,
  os_read_stdin,
  os_rename,
  os_system,
  os_time,
  os_unlink,
  os_write,
  os_write_stdout,
  os_flush_stdout,
  os_write_stderr,
  os_flush_stderr,
 
  os_stat,
  os_fstat,
 
  os_poll_quit,
 
  os_shutdown,
  os_init,
 
  os_printf_filtered,  /* deprecated */
 
  os_vprintf_filtered,
  os_evprintf_filtered,
  os_error,
 
  0,             /* last errno */
 
  { 0, },        /* fdmap */
  { 0, },        /* fdopen */
  { 0, },        /* alwaysopen */
 
  0, /* syscall_map */
  0, /* errno_map */
  0, /* open_map */
  0, /* signal_map */
  0, /* stat_map */
 
  HOST_CALLBACK_MAGIC,
};
 
/* Read in a file describing the target's system call values.
   E.g. maybe someone will want to use something other than newlib.
   This assumes that the basic system call recognition and value passing/
   returning is supported.  So maybe some coding/recompilation will be
   necessary, but not as much.
 
   If an error occurs, the existing mapping is not changed.  */
 
CB_RC
cb_read_target_syscall_maps (cb, file)
     host_callback *cb;
     const char *file;
{
  CB_TARGET_DEFS_MAP *syscall_map, *errno_map, *open_map, *signal_map;
  const char *stat_map;
  FILE *f;
 
  if ((f = fopen (file, "r")) == NULL)
    return CB_RC_ACCESS;
 
  /* ... read in and parse file ... */
 
  fclose (f);
  return CB_RC_NO_MEM; /* FIXME:wip */
 
  /* Free storage allocated for any existing maps.  */
  if (cb->syscall_map)
    free (cb->syscall_map);
  if (cb->errno_map)
    free (cb->errno_map);
  if (cb->open_map)
    free (cb->open_map);
  if (cb->signal_map)
    free (cb->signal_map);
  if (cb->stat_map)
    free ((PTR) cb->stat_map);
 
  cb->syscall_map = syscall_map;
  cb->errno_map = errno_map;
  cb->open_map = open_map;
  cb->signal_map = signal_map;
  cb->stat_map = stat_map;
 
  return CB_RC_OK;
}
 
/* Translate the target's version of a syscall number to the host's.
   This isn't actually the host's version, rather a canonical form.
   ??? Perhaps this should be renamed to ..._canon_syscall.  */
 
int
cb_target_to_host_syscall (cb, target_val)
     host_callback *cb;
     int target_val;
{
  CB_TARGET_DEFS_MAP *m;
 
  for (m = &cb->syscall_map[0]; m->target_val != -1; ++m)
    if (m->target_val == target_val)
      return m->host_val;
 
  return -1;
}
 
/* FIXME: sort tables if large.
   Alternatively, an obvious improvement for errno conversion is
   to machine generate a function with a large switch().  */
 
/* Translate the host's version of errno to the target's.  */
 
int
cb_host_to_target_errno (cb, host_val)
     host_callback *cb;
     int host_val;
{
  CB_TARGET_DEFS_MAP *m;
 
  for (m = &cb->errno_map[0]; m->host_val; ++m)
    if (m->host_val == host_val)
      return m->target_val;
 
  /* ??? Which error to return in this case is up for grabs.
     Note that some missing values may have standard alternatives.
     For now return 0 and require caller to deal with it.  */
  return 0;
}
 
/* Given a set of target bitmasks for the open system call,
   return the host equivalent.
   Mapping open flag values is best done by looping so there's no need
   to machine generate this function.  */
 
int
cb_target_to_host_open (cb, target_val)
     host_callback *cb;
     int target_val;
{
  int host_val = 0;
  CB_TARGET_DEFS_MAP *m;
 
  for (m = &cb->open_map[0]; m->host_val != -1; ++m)
    {
      switch (m->target_val)
        {
          /* O_RDONLY can be (and usually is) 0 which needs to be treated
             specially.  */
        case TARGET_O_RDONLY :
        case TARGET_O_WRONLY :
        case TARGET_O_RDWR :
          if ((target_val & (TARGET_O_RDONLY | TARGET_O_WRONLY | TARGET_O_RDWR))
              == m->target_val)
            host_val |= m->host_val;
          /* Handle the host/target differentiating between binary and
             text mode.  Only one case is of importance */
#if ! defined (TARGET_O_BINARY) && defined (O_BINARY)
          host_val |= O_BINARY;
#endif
          break;
        default :
          if ((m->target_val & target_val) == m->target_val)
            host_val |= m->host_val;
          break;
        }
    }
 
  return host_val;
}
 
/* Utility for cb_host_to_target_stat to store values in the target's
   stat struct.  */
 
static void
store (p, size, val, big_p)
     char *p;
     int size;
     long val; /* ??? must be as big as target word size */
     int big_p;
{
  if (big_p)
    {
      p += size;
      while (size-- > 0)
        {
          *--p = val;
          val >>= 8;
        }
    }
  else
    {
      while (size-- > 0)
        {
          *p++ = val;
          val >>= 8;
        }
    }
}
 
/* Translate a host's stat struct into a target's.
   If HS is NULL, just compute the length of the buffer required,
   TS is ignored.
 
   The result is the size of the target's stat struct,
   or zero if an error occured during the translation.  */
 
int
cb_host_to_target_stat (cb, hs, ts)
     host_callback *cb;
     const struct stat *hs;
     PTR ts;
{
  const char *m = cb->stat_map;
  char *p;
  int big_p = 0;
 
  if (hs == NULL)
    ts = NULL;
  p = ts;
 
  while (m)
    {
      char *q = strchr (m, ',');
      int size;
 
      /* FIXME: Use sscanf? */
      if (q == NULL)
        {
          /* FIXME: print error message */
          return 0;
        }
      size = atoi (q + 1);
      if (size == 0)
        {
          /* FIXME: print error message */
          return 0;
        }
 
      if (hs != NULL)
        {
          if (strncmp (m, "st_dev", q - m) == 0)
            store (p, size, hs->st_dev, big_p);
          else if (strncmp (m, "st_ino", q - m) == 0)
            store (p, size, hs->st_ino, big_p);
          /* FIXME:wip */
          else
            store (p, size, 0, big_p); /* unsupported field, store 0 */
        }
 
      p += size;
      m = strchr (q, ':');
      if (m)
        ++m;
    }
 
  return p - (char *) ts;
}
 
/* Cover functions to the vfprintf callbacks.
 
   ??? If one thinks of the callbacks as a subsystem onto itself [or part of
   a larger "remote target subsystem"] with a well defined interface, then
   one would think that the subsystem would provide these.  However, until
   one is allowed to create such a subsystem (with its own source tree
   independent of any particular user), such a critter can't exist.  Thus
   these functions are here for the time being.  */
 
void
sim_cb_printf (host_callback *p, const char *fmt, ...)
{
  va_list ap;
 
  va_start (ap, fmt);
  p->vprintf_filtered (p, fmt, ap);
  va_end (ap);
}
 
void
sim_cb_eprintf (host_callback *p, const char *fmt, ...)
{
  va_list ap;
 
  va_start (ap, fmt);
  p->evprintf_filtered (p, fmt, ap);
  va_end (ap);
}

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[/] [or1k/] [tags/] [final_interface/] [gdb-5.0/] [sim/] [common/] [callback.c] - Blame information for rev 1765

Line No.	Rev	Author	Line
1	106	markom	`/* Remote target callback routines.`
2			`Copyright 1995, 1996, 1997 Free Software Foundation, Inc.`
3			`Contributed by Cygnus Solutions.`
4
5			`This file is part of GDB.`
6
7			`This program is free software; you can redistribute it and/or modify`
8			`it under the terms of the GNU General Public License as published by`
9			`the Free Software Foundation; either version 2 of the License, or`
10			`(at your option) any later version.`
11
12			`This program is distributed in the hope that it will be useful,`
13			`but WITHOUT ANY WARRANTY; without even the implied warranty of`
14			`MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the`
15			`GNU General Public License for more details.`
16
17			`You should have received a copy of the GNU General Public License`
18			`along with GAS; see the file COPYING. If not, write to the Free Software`
19			`Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */`
20
21			`/* This file provides a standard way for targets to talk to the host OS`
22			`level. */`
23
24			`#ifdef HAVE_CONFIG_H`
25			`#include "config.h"`
26			`#endif`
27			`#include "ansidecl.h"`
28			`#ifdef ANSI_PROTOTYPES`
29			`#include <stdarg.h>`
30			`#else`
31			`#include <varargs.h>`
32			`#endif`
33			`#include <stdio.h>`
34			`#ifdef HAVE_STDLIB_H`
35			`#include <stdlib.h>`
36			`#endif`
37			`#ifdef HAVE_STRING_H`
38			`#include <string.h>`
39			`#else`
40			`#ifdef HAVE_STRINGS_H`
41			`#include <strings.h>`
42			`#endif`
43			`#endif`
44			`#include <errno.h>`
45			`#include <fcntl.h>`
46			`#include <time.h>`
47			`#include <sys/types.h>`
48			`#include <sys/stat.h>`
49			`#include "callback.h"`
50			`#include "targ-vals.h"`
51
52			`#ifdef HAVE_UNISTD_H`
53			`#include <unistd.h>`
54			`#endif`
55
56			`/* ??? sim_cb_printf should be cb_printf, but until the callback support is`
57			`broken out of the simulator directory, these are here to not require`
58			`sim-utils.h. */`
59			`void sim_cb_printf PARAMS ((host_callback , const char , ...));`
60			`void sim_cb_eprintf PARAMS ((host_callback , const char , ...));`
61
62			`extern CB_TARGET_DEFS_MAP cb_init_syscall_map[];`
63			`extern CB_TARGET_DEFS_MAP cb_init_errno_map[];`
64			`extern CB_TARGET_DEFS_MAP cb_init_open_map[];`
65
66			`extern int system PARAMS ((const char *));`
67
68			`static int os_init PARAMS ((host_callback *));`
69			`static int os_shutdown PARAMS ((host_callback *));`
70			`static int os_unlink PARAMS ((host_callback , const char ));`
71			`static long os_time PARAMS ((host_callback , long ));`
72			`static int os_system PARAMS ((host_callback , const char ));`
73			`static int os_rename PARAMS ((host_callback , const char , const char *));`
74			`static int os_write_stdout PARAMS ((host_callback , const char , int));`
75			`static void os_flush_stdout PARAMS ((host_callback *));`
76			`static int os_write_stderr PARAMS ((host_callback , const char , int));`
77			`static void os_flush_stderr PARAMS ((host_callback *));`
78			`static int os_write PARAMS ((host_callback , int, const char , int));`
79			`static int os_read_stdin PARAMS ((host_callback , char , int));`
80			`static int os_read PARAMS ((host_callback , int, char , int));`
81			`static int os_open PARAMS ((host_callback , const char , int));`
82			`static int os_lseek PARAMS ((host_callback *, int, long, int));`
83			`static int os_isatty PARAMS ((host_callback *, int));`
84			`static int os_get_errno PARAMS ((host_callback *));`
85			`static int os_close PARAMS ((host_callback *, int));`
86			`static void os_vprintf_filtered PARAMS ((host_callback , const char , va_list));`
87			`static void os_evprintf_filtered PARAMS ((host_callback , const char , va_list));`
88			`static void os_error PARAMS ((host_callback , const char , ...));`
89			`static int fdmap PARAMS ((host_callback *, int));`
90			`static int fdbad PARAMS ((host_callback *, int));`
91			`static int wrap PARAMS ((host_callback *, int));`
92
93			`/* Set the callback copy of errno from what we see now. */`
94
95			`static int`
96			`wrap (p, val)`
97			`host_callback *p;`
98			`int val;`
99			`{`
100			`p->last_errno = errno;`
101			`return val;`
102			`}`
103
104			`/* Make sure the FD provided is ok. If not, return non-zero`
105			`and set errno. */`
106
107			`static int`
108			`fdbad (p, fd)`
109			`host_callback *p;`
110			`int fd;`
111			`{`
112			`if (fd < 0 \|\| fd > MAX_CALLBACK_FDS \|\| !p->fdopen[fd])`
113			`{`
114			`p->last_errno = EINVAL;`
115			`return -1;`
116			`}`
117			`return 0;`
118			`}`
119
120			`static int`
121			`fdmap (p, fd)`
122			`host_callback *p;`
123			`int fd;`
124			`{`
125			`return p->fdmap[fd];`
126			`}`
127
128			`static int`
129			`os_close (p, fd)`
130			`host_callback *p;`
131			`int fd;`
132			`{`
133			`int result;`
134
135			`result = fdbad (p, fd);`
136			`if (result)`
137			`return result;`
138			`result = wrap (p, close (fdmap (p, fd)));`
139			`if (result == 0 && !p->alwaysopen[fd])`
140			`p->fdopen[fd] = 0;`
141
142			`return result;`
143			`}`
144
145
146			`/* taken from gdb/util.c:notice_quit() - should be in a library */`
147
148
149			`#if defined(__GO32__) \|\| defined (_MSC_VER)`
150			`static int`
151			`os_poll_quit (p)`
152			`host_callback *p;`
153			`{`
154			`#if defined(__GO32__)`
155			`int kbhit ();`
156			`int getkey ();`
157			`if (kbhit ())`
158			`{`
159			`int k = getkey ();`
160			`if (k == 1)`
161			`{`
162			`return 1;`
163			`}`
164			`else if (k == 2)`
165			`{`
166			`return 1;`
167			`}`
168			`else`
169			`{`
170			`sim_cb_eprintf (p, "CTRL-A to quit, CTRL-B to quit harder\n");`
171			`}`
172			`}`
173			`#endif`
174			`#if defined (_MSC_VER)`
175			`/* NB - this will not compile! */`
176			`int k = win32pollquit();`
177			`if (k == 1)`
178			`return 1;`
179			`else if (k == 2)`
180			`return 1;`
181			`#endif`
182			`return 0;`
183			`}`
184			`#else`
185			`#define os_poll_quit 0`
186			`#endif /* defined(__GO32__) \|\| defined(_MSC_VER) */`
187
188			`static int`
189			`os_get_errno (p)`
190			`host_callback *p;`
191			`{`
192			`return cb_host_to_target_errno (p, p->last_errno);`
193			`}`
194
195
196			`static int`
197			`os_isatty (p, fd)`
198			`host_callback *p;`
199			`int fd;`
200			`{`
201			`int result;`
202
203			`result = fdbad (p, fd);`
204			`if (result)`
205			`return result;`
206			`result = wrap (p, isatty (fdmap (p, fd)));`
207
208			`return result;`
209			`}`
210
211			`static int`
212			`os_lseek (p, fd, off, way)`
213			`host_callback *p;`
214			`int fd;`
215			`long off;`
216			`int way;`
217			`{`
218			`int result;`
219
220			`result = fdbad (p, fd);`
221			`if (result)`
222			`return result;`
223			`result = lseek (fdmap (p, fd), off, way);`
224			`return result;`
225			`}`
226
227			`static int`
228			`os_open (p, name, flags)`
229			`host_callback *p;`
230			`const char *name;`
231			`int flags;`
232			`{`
233			`int i;`
234			`for (i = 0; i < MAX_CALLBACK_FDS; i++)`
235			`{`
236			`if (!p->fdopen[i])`
237			`{`
238			`int f = open (name, cb_target_to_host_open (p, flags), 0644);`
239			`if (f < 0)`
240			`{`
241			`p->last_errno = errno;`
242			`return f;`
243			`}`
244			`p->fdopen[i] = 1;`
245			`p->fdmap[i] = f;`
246			`return i;`
247			`}`
248			`}`
249			`p->last_errno = EMFILE;`
250			`return -1;`
251			`}`
252
253			`static int`
254			`os_read (p, fd, buf, len)`
255			`host_callback *p;`
256			`int fd;`
257			`char *buf;`
258			`int len;`
259			`{`
260			`int result;`
261
262			`result = fdbad (p, fd);`
263			`if (result)`
264			`return result;`
265			`result = wrap (p, read (fdmap (p, fd), buf, len));`
266			`return result;`
267			`}`
268
269			`static int`
270			`os_read_stdin (p, buf, len)`
271			`host_callback *p;`
272			`char *buf;`
273			`int len;`
274			`{`
275			`return wrap (p, read (0, buf, len));`
276			`}`
277
278			`static int`
279			`os_write (p, fd, buf, len)`
280			`host_callback *p;`
281			`int fd;`
282			`const char *buf;`
283			`int len;`
284			`{`
285			`int result;`
286			`int real_fd;`
287
288			`result = fdbad (p, fd);`
289			`if (result)`
290			`return result;`
291			`real_fd = fdmap (p, fd);`
292			`switch (real_fd)`
293			`{`
294			`default:`
295			`result = wrap (p, write (real_fd, buf, len));`
296			`break;`
297			`case 1:`
298			`result = p->write_stdout (p, buf, len);`
299			`break;`
300			`case 2:`
301			`result = p->write_stderr (p, buf, len);`
302			`break;`
303			`}`
304			`return result;`
305			`}`
306
307			`static int`
308			`os_write_stdout (p, buf, len)`
309			`host_callback *p ATTRIBUTE_UNUSED;`
310			`const char *buf;`
311			`int len;`
312			`{`
313			`return fwrite (buf, 1, len, stdout);`
314			`}`
315
316			`static void`
317			`os_flush_stdout (p)`
318			`host_callback *p ATTRIBUTE_UNUSED;`
319			`{`
320			`fflush (stdout);`
321			`}`
322
323			`static int`
324			`os_write_stderr (p, buf, len)`
325			`host_callback *p ATTRIBUTE_UNUSED;`
326			`const char *buf;`
327			`int len;`
328			`{`
329			`return fwrite (buf, 1, len, stderr);`
330			`}`
331
332			`static void`
333			`os_flush_stderr (p)`
334			`host_callback *p ATTRIBUTE_UNUSED;`
335			`{`
336			`fflush (stderr);`
337			`}`
338
339			`static int`
340			`os_rename (p, f1, f2)`
341			`host_callback *p;`
342			`const char *f1;`
343			`const char *f2;`
344			`{`
345			`return wrap (p, rename (f1, f2));`
346			`}`
347
348
349			`static int`
350			`os_system (p, s)`
351			`host_callback *p;`
352			`const char *s;`
353			`{`
354			`return wrap (p, system (s));`
355			`}`
356
357			`static long`
358			`os_time (p, t)`
359			`host_callback *p;`
360			`long *t;`
361			`{`
362			`return wrap (p, time (t));`
363			`}`
364
365
366			`static int`
367			`os_unlink (p, f1)`
368			`host_callback *p;`
369			`const char *f1;`
370			`{`
371			`return wrap (p, unlink (f1));`
372			`}`
373
374			`static int`
375			`os_stat (p, file, buf)`
376			`host_callback *p;`
377			`const char *file;`
378			`struct stat *buf;`
379			`{`
380			`/* ??? There is an issue of when to translate to the target layout.`
381			`One could do that inside this function, or one could have the`
382			`caller do it. It's more flexible to let the caller do it, though`
383			`I'm not sure the flexibility will ever be useful. */`
384			`return wrap (p, stat (file, buf));`
385			`}`
386
387			`static int`
388			`os_fstat (p, fd, buf)`
389			`host_callback *p;`
390			`int fd;`
391			`struct stat *buf;`
392			`{`
393			`if (fdbad (p, fd))`
394			`return -1;`
395			`/* ??? There is an issue of when to translate to the target layout.`
396			`One could do that inside this function, or one could have the`
397			`caller do it. It's more flexible to let the caller do it, though`
398			`I'm not sure the flexibility will ever be useful. */`
399			`return wrap (p, fstat (fdmap (p, fd), buf));`
400			`}`
401
402			`static int`
403			`os_shutdown (p)`
404			`host_callback *p;`
405			`{`
406			`int i;`
407			`for (i = 0; i < MAX_CALLBACK_FDS; i++)`
408			`{`
409			`if (p->fdopen[i] && !p->alwaysopen[i]) {`
410			`close (p->fdmap[i]);`
411			`p->fdopen[i] = 0;`
412			`}`
413			`}`
414			`return 1;`
415			`}`
416
417			`static int`
418			`os_init (p)`
419			`host_callback *p;`
420			`{`
421			`int i;`
422
423			`os_shutdown (p);`
424			`for (i = 0; i < 3; i++)`
425			`{`
426			`p->fdmap[i] = i;`
427			`p->fdopen[i] = 1;`
428			`p->alwaysopen[i] = 1;`
429			`}`
430
431			`p->syscall_map = cb_init_syscall_map;`
432			`p->errno_map = cb_init_errno_map;`
433			`p->open_map = cb_init_open_map;`
434
435			`return 1;`
436			`}`
437
438			`/* DEPRECIATED */`
439
440			`/* VARARGS */`
441			`static void`
442			`#ifdef ANSI_PROTOTYPES`
443			`os_printf_filtered (host_callback p ATTRIBUTE_UNUSED, const char format, ...)`
444			`#else`
445			`os_printf_filtered (p, va_alist)`
446			`host_callback *p;`
447			`va_dcl`
448			`#endif`
449			`{`
450			`va_list args;`
451			`#ifdef ANSI_PROTOTYPES`
452			`va_start (args, format);`
453			`#else`
454			`char *format;`
455
456			`va_start (args);`
457			`format = va_arg (args, char *);`
458			`#endif`
459
460			`vfprintf (stdout, format, args);`
461			`va_end (args);`
462			`}`
463
464			`/* VARARGS */`
465			`static void`
466			`#ifdef ANSI_PROTOTYPES`
467			`os_vprintf_filtered (host_callback p ATTRIBUTE_UNUSED, const char format, va_list args)`
468			`#else`
469			`os_vprintf_filtered (p, format, args)`
470			`host_callback *p;`
471			`const char *format;`
472			`va_list args;`
473			`#endif`
474			`{`
475			`vprintf (format, args);`
476			`}`
477
478			`/* VARARGS */`
479			`static void`
480			`#ifdef ANSI_PROTOTYPES`
481			`os_evprintf_filtered (host_callback p ATTRIBUTE_UNUSED, const char format, va_list args)`
482			`#else`
483			`os_evprintf_filtered (p, format, args)`
484			`host_callback *p;`
485			`const char *format;`
486			`va_list args;`
487			`#endif`
488			`{`
489			`vfprintf (stderr, format, args);`
490			`}`
491
492			`/* VARARGS */`
493			`static void`
494			`#ifdef ANSI_PROTOTYPES`
495			`os_error (host_callback p ATTRIBUTE_UNUSED, const char format, ...)`
496			`#else`
497			`os_error (p, va_alist)`
498			`host_callback *p;`
499			`va_dcl`
500			`#endif`
501			`{`
502			`va_list args;`
503			`#ifdef ANSI_PROTOTYPES`
504			`va_start (args, format);`
505			`#else`
506			`char *format;`
507
508			`va_start (args);`
509			`format = va_arg (args, char *);`
510			`#endif`
511
512			`vfprintf (stderr, format, args);`
513			`fprintf (stderr, "\n");`
514
515			`va_end (args);`
516			`exit (1);`
517			`}`
518
519			`host_callback default_callback =`
520			`{`
521			`os_close,`
522			`os_get_errno,`
523			`os_isatty,`
524			`os_lseek,`
525			`os_open,`
526			`os_read,`
527			`os_read_stdin,`
528			`os_rename,`
529			`os_system,`
530			`os_time,`
531			`os_unlink,`
532			`os_write,`
533			`os_write_stdout,`
534			`os_flush_stdout,`
535			`os_write_stderr,`
536			`os_flush_stderr,`
537
538			`os_stat,`
539			`os_fstat,`
540
541			`os_poll_quit,`
542
543			`os_shutdown,`
544			`os_init,`
545
546			`os_printf_filtered, /* deprecated */`
547
548			`os_vprintf_filtered,`
549			`os_evprintf_filtered,`
550			`os_error,`
551
552			`0, /* last errno */`
553
554			`{ 0, }, /* fdmap */`
555			`{ 0, }, /* fdopen */`
556			`{ 0, }, /* alwaysopen */`
557
558			`0, /* syscall_map */`
559			`0, /* errno_map */`
560			`0, /* open_map */`
561			`0, /* signal_map */`
562			`0, /* stat_map */`
563
564			`HOST_CALLBACK_MAGIC,`
565			`};`
566
567			`/* Read in a file describing the target's system call values.`
568			`E.g. maybe someone will want to use something other than newlib.`
569			`This assumes that the basic system call recognition and value passing/`
570			`returning is supported. So maybe some coding/recompilation will be`
571			`necessary, but not as much.`
572
573			`If an error occurs, the existing mapping is not changed. */`
574
575			`CB_RC`
576			`cb_read_target_syscall_maps (cb, file)`
577			`host_callback *cb;`
578			`const char *file;`
579			`{`
580			`CB_TARGET_DEFS_MAP syscall_map, errno_map, open_map, signal_map;`
581			`const char *stat_map;`
582			`FILE *f;`
583
584			`if ((f = fopen (file, "r")) == NULL)`
585			`return CB_RC_ACCESS;`
586
587			`/* ... read in and parse file ... */`
588
589			`fclose (f);`
590			`return CB_RC_NO_MEM; /* FIXME:wip */`
591
592			`/* Free storage allocated for any existing maps. */`
593			`if (cb->syscall_map)`
594			`free (cb->syscall_map);`
595			`if (cb->errno_map)`
596			`free (cb->errno_map);`
597			`if (cb->open_map)`
598			`free (cb->open_map);`
599			`if (cb->signal_map)`
600			`free (cb->signal_map);`
601			`if (cb->stat_map)`
602			`free ((PTR) cb->stat_map);`
603
604			`cb->syscall_map = syscall_map;`
605			`cb->errno_map = errno_map;`
606			`cb->open_map = open_map;`
607			`cb->signal_map = signal_map;`
608			`cb->stat_map = stat_map;`
609
610			`return CB_RC_OK;`
611			`}`
612
613			`/* Translate the target's version of a syscall number to the host's.`
614			`This isn't actually the host's version, rather a canonical form.`
615			`??? Perhaps this should be renamed to ..._canon_syscall. */`
616
617			`int`
618			`cb_target_to_host_syscall (cb, target_val)`
619			`host_callback *cb;`
620			`int target_val;`
621			`{`
622			`CB_TARGET_DEFS_MAP *m;`
623
624			`for (m = &cb->syscall_map[0]; m->target_val != -1; ++m)`
625			`if (m->target_val == target_val)`
626			`return m->host_val;`
627
628			`return -1;`
629			`}`
630
631			`/* FIXME: sort tables if large.`
632			`Alternatively, an obvious improvement for errno conversion is`
633			`to machine generate a function with a large switch(). */`
634
635			`/* Translate the host's version of errno to the target's. */`
636
637			`int`
638			`cb_host_to_target_errno (cb, host_val)`
639			`host_callback *cb;`
640			`int host_val;`
641			`{`
642			`CB_TARGET_DEFS_MAP *m;`
643
644			`for (m = &cb->errno_map[0]; m->host_val; ++m)`
645			`if (m->host_val == host_val)`
646			`return m->target_val;`
647
648			`/* ??? Which error to return in this case is up for grabs.`
649			`Note that some missing values may have standard alternatives.`
650			`For now return 0 and require caller to deal with it. */`
651			`return 0;`
652			`}`
653
654			`/* Given a set of target bitmasks for the open system call,`
655			`return the host equivalent.`
656			`Mapping open flag values is best done by looping so there's no need`
657			`to machine generate this function. */`
658
659			`int`
660			`cb_target_to_host_open (cb, target_val)`
661			`host_callback *cb;`
662			`int target_val;`
663			`{`
664			`int host_val = 0;`
665			`CB_TARGET_DEFS_MAP *m;`
666
667			`for (m = &cb->open_map[0]; m->host_val != -1; ++m)`
668			`{`
669			`switch (m->target_val)`
670			`{`
671			`/* O_RDONLY can be (and usually is) 0 which needs to be treated`
672			`specially. */`
673			`case TARGET_O_RDONLY :`
674			`case TARGET_O_WRONLY :`
675			`case TARGET_O_RDWR :`
676			`if ((target_val & (TARGET_O_RDONLY \| TARGET_O_WRONLY \| TARGET_O_RDWR))`
677			`== m->target_val)`
678			`host_val \|= m->host_val;`
679			`/* Handle the host/target differentiating between binary and`
680			`text mode. Only one case is of importance */`
681			`#if ! defined (TARGET_O_BINARY) && defined (O_BINARY)`
682			`host_val \|= O_BINARY;`
683			`#endif`
684			`break;`
685			`default :`
686			`if ((m->target_val & target_val) == m->target_val)`
687			`host_val \|= m->host_val;`
688			`break;`
689			`}`
690			`}`
691
692			`return host_val;`
693			`}`
694
695			`/* Utility for cb_host_to_target_stat to store values in the target's`
696			`stat struct. */`
697
698			`static void`
699			`store (p, size, val, big_p)`
700			`char *p;`
701			`int size;`
702			`long val; /* ??? must be as big as target word size */`
703			`int big_p;`
704			`{`
705			`if (big_p)`
706			`{`
707			`p += size;`
708			`while (size-- > 0)`
709			`{`
710			`*--p = val;`
711			`val >>= 8;`
712			`}`
713			`}`
714			`else`
715			`{`
716			`while (size-- > 0)`
717			`{`
718			`*p++ = val;`
719			`val >>= 8;`
720			`}`
721			`}`
722			`}`
723
724			`/* Translate a host's stat struct into a target's.`
725			`If HS is NULL, just compute the length of the buffer required,`
726			`TS is ignored.`
727
728			`The result is the size of the target's stat struct,`
729			`or zero if an error occured during the translation. */`
730
731			`int`
732			`cb_host_to_target_stat (cb, hs, ts)`
733			`host_callback *cb;`
734			`const struct stat *hs;`
735			`PTR ts;`
736			`{`
737			`const char *m = cb->stat_map;`
738			`char *p;`
739			`int big_p = 0;`
740
741			`if (hs == NULL)`
742			`ts = NULL;`
743			`p = ts;`
744
745			`while (m)`
746			`{`
747			`char *q = strchr (m, ',');`
748			`int size;`
749
750			`/* FIXME: Use sscanf? */`
751			`if (q == NULL)`
752			`{`
753			`/* FIXME: print error message */`
754			`return 0;`
755			`}`
756			`size = atoi (q + 1);`
757			`if (size == 0)`
758			`{`
759			`/* FIXME: print error message */`
760			`return 0;`
761			`}`
762
763			`if (hs != NULL)`
764			`{`
765			`if (strncmp (m, "st_dev", q - m) == 0)`
766			`store (p, size, hs->st_dev, big_p);`
767			`else if (strncmp (m, "st_ino", q - m) == 0)`
768			`store (p, size, hs->st_ino, big_p);`
769			`/* FIXME:wip */`
770			`else`
771			`store (p, size, 0, big_p); /* unsupported field, store 0 */`
772			`}`
773
774			`p += size;`
775			`m = strchr (q, ':');`
776			`if (m)`
777			`++m;`
778			`}`
779
780			`return p - (char *) ts;`
781			`}`
782
783			`/* Cover functions to the vfprintf callbacks.`
784
785			`??? If one thinks of the callbacks as a subsystem onto itself [or part of`
786			`a larger "remote target subsystem"] with a well defined interface, then`
787			`one would think that the subsystem would provide these. However, until`
788			`one is allowed to create such a subsystem (with its own source tree`
789			`independent of any particular user), such a critter can't exist. Thus`
790			`these functions are here for the time being. */`
791
792			`void`
793			`sim_cb_printf (host_callback p, const char fmt, ...)`
794			`{`
795			`va_list ap;`
796
797			`va_start (ap, fmt);`
798			`p->vprintf_filtered (p, fmt, ap);`
799			`va_end (ap);`
800			`}`
801
802			`void`
803			`sim_cb_eprintf (host_callback p, const char fmt, ...)`
804			`{`
805			`va_list ap;`
806
807			`va_start (ap, fmt);`
808			`p->evprintf_filtered (p, fmt, ap);`
809			`va_end (ap);`
810			`}`