-/* Host callback routines for GDB.
- Copyright 1995, 1996 Free Software Foundation, Inc.
- Contributed by Cygnus Support.
+/* Remote target callback routines.
+ Copyright 1995, 1996, 1997 Free Software Foundation, Inc.
+ Contributed by Cygnus Solutions.
This file is part of GDB.
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. */
+ 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_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"
#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 fdmap PARAMS ((host_callback *, int));
static int fdbad PARAMS ((host_callback *, int));
static int wrap PARAMS ((host_callback *, int));
+static int enosys PARAMS ((host_callback *, int));
/* Set the callback copy of errno from what we see now. */
return val;
}
+/* Return a value indicating the system call isn't present. */
+
+static int
+enosys (p, result)
+ host_callback *p;
+ int result;
+{
+#ifdef ENOSYS
+ p->last_errno = ENOSYS;
+#else
+ p->last_errno = EINVAL;
+#endif
+ return result;
+}
+
/* Make sure the FD provided is ok. If not, return non-zero
and set errno. */
}
-/* taken from gdb/util.c - should be in a library */
+/* taken from gdb/util.c:notice_quit() - should be in a library */
-#if defined(__GO32__) || defined (_WIN32)
-int
+#if defined(__GO32__) || defined (_MSC_VER)
+static int
os_poll_quit (p)
host_callback *p;
{
-#ifndef _MSC_VER
+#if defined(__GO32__)
+ int kbhit ();
+ int getkey ();
if (kbhit ())
{
int k = getkey ();
}
else
{
- p->eprintf (p, "CTRL-A to quit, CTRL-B to quit harder\n");
+ sim_cb_eprintf (p, "CTRL-A to quit, CTRL-B to quit harder\n");
}
}
-#else /* !_MSC_VER */
+#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 /* !_MSC_VER */
+#endif
return 0;
}
#else
#define os_poll_quit 0
-#endif /* defined(__GO32__) || defined(_WIN32) */
+#endif /* defined(__GO32__) || defined(_MSC_VER) */
static int
os_get_errno (p)
host_callback *p;
{
- return host_to_target_errno (p->last_errno);
+ return cb_host_to_target_errno (p, p->last_errno);
}
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, target_to_host_open (flags), 0644);
+ int f = open (name, cb_target_to_host_open (p, flags), 0644);
if (f < 0)
{
p->last_errno = errno;
int len;
{
int result;
+ int real_fd;
result = fdbad (p, fd);
if (result)
return result;
- result = wrap (p, write (fdmap (p, fd), buf, len));
+ 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;
}
return wrap (p, unlink (f1));
}
+static int
+os_stat (p, file, buf)
+ host_callback *p;
+ const char *file;
+ PTR buf;
+{
+ return wrap (p, stat (file, buf));
+}
+
+static int
+os_fstat (p, fd, buf)
+ host_callback *p;
+ int fd;
+ PTR buf;
+{
+ return wrap (p, fstat (fd, buf));
+}
static int
os_shutdown (p)
}
static int
-os_init(p)
+os_init (p)
host_callback *p;
{
int i;
+
os_shutdown (p);
- for (i= 0; i < 3; i++)
+ 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;
}
os_write_stderr,
os_flush_stderr,
+ os_stat,
+ os_fstat,
+
os_poll_quit,
os_shutdown,
os_init,
- os_printf_filtered, /* depreciated */
+ os_printf_filtered, /* deprecated */
os_vprintf_filtered,
os_evprintf_filtered,
{ 0, }, /* fdopen */
{ 0, }, /* alwaysopen */
+ 0, /* syscall_map */
+ 0, /* errno_map */
+ 0, /* open_map */
+ 0, /* signal_map */
+ 0, /* stat_map */
+
HOST_CALLBACK_MAGIC,
};
\f
-/* FIXME: Need to add hooks so target can tweak as necessary. */
+/* 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;
-/* FIXME: struct stat conversion is missing. */
+ 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
-host_to_target_errno (host_val)
+cb_host_to_target_errno (cb, host_val)
+ host_callback *cb;
int host_val;
{
- target_defs_map *m;
+ CB_TARGET_DEFS_MAP *m;
- for (m = &errno_map[0]; m->host_val; ++m)
+ for (m = &cb->errno_map[0]; m->host_val; ++m)
if (m->host_val == host_val)
return m->target_val;
to machine generate this function. */
int
-target_to_host_open (target_val)
+cb_target_to_host_open (cb, target_val)
+ host_callback *cb;
int target_val;
{
int host_val = 0;
- target_defs_map *m;
+ CB_TARGET_DEFS_MAP *m;
- for (m = &open_map[0]; m->host_val != -1; ++m)
+ for (m = &cb->open_map[0]; m->host_val != -1; ++m)
{
switch (m->target_val)
{
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)
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.
+
+ BIG_P is non-zero if the target is big-endian.
+ 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, big_p)
+ host_callback *cb;
+ const struct stat *hs;
+ PTR ts;
+ int big_p;
+{
+ const char *m = cb->stat_map;
+ char *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 (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;
+}
+\f
+/* 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);
+}
projects / deliverable / binutils-gdb.git / blobdiff