1 /* Remote target callback routines.
2 Copyright 1995, 1996, 1997 Free Software Foundation, Inc.
3 Contributed by Cygnus Solutions.
5 This file is part of GDB.
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.
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.
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. */
21 /* This file provides a standard way for targets to talk to the host OS
28 #ifdef ANSI_PROTOTYPES
47 #include <sys/types.h>
50 #include "targ-vals.h"
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
59 void sim_cb_printf PARAMS ((host_callback *, const char *, ...));
60 void sim_cb_eprintf PARAMS ((host_callback *, const char *, ...));
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[];
66 extern int system PARAMS ((const char *));
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 static int enosys PARAMS ((host_callback *, int));
94 /* Set the callback copy of errno from what we see now. */
101 p->last_errno = errno;
105 /* Return a value indicating the system call isn't present. */
113 p->last_errno = ENOSYS;
115 p->last_errno = EINVAL;
120 /* Make sure the FD provided is ok. If not, return non-zero
128 if (fd < 0 || fd > MAX_CALLBACK_FDS || !p->fdopen[fd])
130 p->last_errno = EINVAL;
151 result = fdbad (p, fd);
154 result = wrap (p, close (fdmap (p, fd)));
155 if(result == 0 && !p->alwaysopen[fd])
162 /* taken from gdb/util.c:notice_quit() - should be in a library */
165 #if defined(__GO32__) || defined (_MSC_VER)
170 #if defined(__GO32__)
186 sim_cb_eprintf (p, "CTRL-A to quit, CTRL-B to quit harder\n");
190 #if defined (_MSC_VER)
191 /* NB - this will not compile! */
192 int k = win32pollquit();
201 #define os_poll_quit 0
202 #endif /* defined(__GO32__) || defined(_MSC_VER) */
208 return cb_host_to_target_errno (p, p->last_errno);
219 result = fdbad (p, fd);
222 result = wrap (p, isatty (fdmap (p, fd)));
228 os_lseek (p, fd, off, way)
236 result = fdbad (p, fd);
239 result = lseek (fdmap (p, fd), off, way);
244 os_open (p, name, flags)
250 for (i = 0; i < MAX_CALLBACK_FDS; i++)
254 int f = open (name, cb_target_to_host_open (p, flags), 0644);
257 p->last_errno = errno;
265 p->last_errno = EMFILE;
270 os_read (p, fd, buf, len)
278 result = fdbad (p, fd);
281 result = wrap (p, read (fdmap (p, fd), buf, len));
286 os_read_stdin (p, buf, len)
291 return wrap (p, read (0, buf, len));
295 os_write (p, fd, buf, len)
304 result = fdbad (p, fd);
307 real_fd = fdmap (p, fd);
311 result = wrap (p, write (real_fd, buf, len));
314 result = p->write_stdout (p, buf, len);
317 result = p->write_stderr (p, buf, len);
324 os_write_stdout (p, buf, len)
329 return fwrite(buf, 1, len, stdout);
340 os_write_stderr (p, buf, len)
345 return fwrite(buf, 1, len, stderr);
356 os_rename (p, f1, f2)
361 return wrap (p, rename (f1, f2));
370 return wrap (p, system (s));
378 return wrap (p, time (t));
387 return wrap (p, unlink (f1));
391 os_stat (p, file, buf)
396 return wrap (p, stat (file, buf));
400 os_fstat (p, fd, buf)
405 return wrap (p, fstat (fd, buf));
413 for (i = 0; i < MAX_CALLBACK_FDS; i++)
415 if (p->fdopen[i] && !p->alwaysopen[i]) {
430 for (i = 0; i < 3; i++)
434 p->alwaysopen[i] = 1;
437 p->syscall_map = cb_init_syscall_map;
438 p->errno_map = cb_init_errno_map;
439 p->open_map = cb_init_open_map;
448 #ifdef ANSI_PROTOTYPES
449 os_printf_filtered (host_callback *p, const char *format, ...)
451 os_printf_filtered (p, va_alist)
457 #ifdef ANSI_PROTOTYPES
458 va_start (args, format);
463 format = va_arg (args, char *);
466 vfprintf (stdout, format, args);
472 #ifdef ANSI_PROTOTYPES
473 os_vprintf_filtered (host_callback *p, const char *format, va_list args)
475 os_vprintf_filtered (p, format, args)
481 vprintf (format, args);
486 #ifdef ANSI_PROTOTYPES
487 os_evprintf_filtered (host_callback *p, const char *format, va_list args)
489 os_evprintf_filtered (p, format, args)
495 vfprintf (stderr, format, args);
500 #ifdef ANSI_PROTOTYPES
501 os_error (host_callback *p, const char *format, ...)
503 os_error (p, va_alist)
509 #ifdef ANSI_PROTOTYPES
510 va_start (args, format);
515 format = va_arg (args, char *);
518 vfprintf (stderr, format, args);
519 fprintf (stderr, "\n");
525 host_callback default_callback =
552 os_printf_filtered, /* deprecated */
555 os_evprintf_filtered,
562 { 0, }, /* alwaysopen */
573 /* Read in a file describing the target's system call values.
574 E.g. maybe someone will want to use something other than newlib.
575 This assumes that the basic system call recognition and value passing/
576 returning is supported. So maybe some coding/recompilation will be
577 necessary, but not as much.
579 If an error occurs, the existing mapping is not changed. */
582 cb_read_target_syscall_maps (cb, file)
586 CB_TARGET_DEFS_MAP *syscall_map, *errno_map, *open_map, *signal_map;
587 const char *stat_map;
590 if ((f = fopen (file, "r")) == NULL)
593 /* ... read in and parse file ... */
596 return CB_RC_NO_MEM; /* FIXME:wip */
598 /* Free storage allocated for any existing maps. */
600 free (cb->syscall_map);
602 free (cb->errno_map);
606 free (cb->signal_map);
608 free ((PTR) cb->stat_map);
610 cb->syscall_map = syscall_map;
611 cb->errno_map = errno_map;
612 cb->open_map = open_map;
613 cb->signal_map = signal_map;
614 cb->stat_map = stat_map;
619 /* Translate the target's version of a syscall number to the host's.
620 This isn't actually the host's version, rather a canonical form.
621 ??? Perhaps this should be renamed to ..._canon_syscall. */
624 cb_target_to_host_syscall (cb, target_val)
628 CB_TARGET_DEFS_MAP *m;
630 for (m = &cb->syscall_map[0]; m->target_val != -1; ++m)
631 if (m->target_val == target_val)
637 /* FIXME: sort tables if large.
638 Alternatively, an obvious improvement for errno conversion is
639 to machine generate a function with a large switch(). */
641 /* Translate the host's version of errno to the target's. */
644 cb_host_to_target_errno (cb, host_val)
648 CB_TARGET_DEFS_MAP *m;
650 for (m = &cb->errno_map[0]; m->host_val; ++m)
651 if (m->host_val == host_val)
652 return m->target_val;
654 /* ??? Which error to return in this case is up for grabs.
655 Note that some missing values may have standard alternatives.
656 For now return 0 and require caller to deal with it. */
660 /* Given a set of target bitmasks for the open system call,
661 return the host equivalent.
662 Mapping open flag values is best done by looping so there's no need
663 to machine generate this function. */
666 cb_target_to_host_open (cb, target_val)
671 CB_TARGET_DEFS_MAP *m;
673 for (m = &cb->open_map[0]; m->host_val != -1; ++m)
675 switch (m->target_val)
677 /* O_RDONLY can be (and usually is) 0 which needs to be treated
679 case TARGET_O_RDONLY :
680 case TARGET_O_WRONLY :
682 if ((target_val & (TARGET_O_RDONLY | TARGET_O_WRONLY | TARGET_O_RDWR))
684 host_val |= m->host_val;
685 /* Handle the host/target differentiating between binary and
686 text mode. Only one case is of importance */
687 #if ! defined (TARGET_O_BINARY) && defined (O_BINARY)
688 host_val |= O_BINARY;
692 if ((m->target_val & target_val) == m->target_val)
693 host_val |= m->host_val;
701 /* Utility for cb_host_to_target_stat to store values in the target's
705 store (p, size, val, big_p)
708 long val; /* ??? must be as big as target word size */
730 /* Translate a host's stat struct into a target's.
732 BIG_P is non-zero if the target is big-endian.
733 The result is the size of the target's stat struct. */
736 cb_host_to_target_stat (cb, hs, ts, big_p)
738 const struct stat *hs;
742 const char *m = cb->stat_map;
747 char *q = strchr (m, ',');
750 /* FIXME: Use sscanf? */
753 /* FIXME: print error message */
759 /* FIXME: print error message */
763 if (strncmp (m, "st_dev", q - m) == 0)
764 store (p, size, hs->st_dev, big_p);
765 else if (strncmp (m, "st_ino", q - m) == 0)
766 store (p, size, hs->st_ino, big_p);
769 store (p, size, 0, big_p); /* unsupported field, store 0 */
778 /* Cover functions to the vfprintf callbacks.
780 ??? If one thinks of the callbacks as a subsystem onto itself [or part of
781 a larger "remote target subsystem"] with a well defined interface, then
782 one would think that the subsystem would provide these. However, until
783 one is allowed to create such a subsystem (with its own source tree
784 independent of any particular user), such a critter can't exist. Thus
785 these functions are here for the time being. */
788 sim_cb_printf (host_callback *p, const char *fmt, ...)
793 p->vprintf_filtered (p, fmt, ap);
798 sim_cb_eprintf (host_callback *p, const char *fmt, ...)
803 p->evprintf_filtered (p, fmt, ap);