+/* Support for inferring a target description based on the current
+ architecture and the size of a 'g' packet. While the 'g' packet
+ can have any size (since optional registers can be left off the
+ end), some sizes are easily recognizable given knowledge of the
+ approximate architecture. */
+
+struct remote_g_packet_guess
+{
+ int bytes;
+ const struct target_desc *tdesc;
+};
+typedef struct remote_g_packet_guess remote_g_packet_guess_s;
+DEF_VEC_O(remote_g_packet_guess_s);
+
+struct remote_g_packet_data
+{
+ VEC(remote_g_packet_guess_s) *guesses;
+};
+
+static struct gdbarch_data *remote_g_packet_data_handle;
+
+static void *
+remote_g_packet_data_init (struct obstack *obstack)
+{
+ return OBSTACK_ZALLOC (obstack, struct remote_g_packet_data);
+}
+
+void
+register_remote_g_packet_guess (struct gdbarch *gdbarch, int bytes,
+ const struct target_desc *tdesc)
+{
+ struct remote_g_packet_data *data
+ = gdbarch_data (gdbarch, remote_g_packet_data_handle);
+ struct remote_g_packet_guess new_guess, *guess;
+ int ix;
+
+ gdb_assert (tdesc != NULL);
+
+ for (ix = 0;
+ VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
+ ix++)
+ if (guess->bytes == bytes)
+ internal_error (__FILE__, __LINE__,
+ "Duplicate g packet description added for size %d",
+ bytes);
+
+ new_guess.bytes = bytes;
+ new_guess.tdesc = tdesc;
+ VEC_safe_push (remote_g_packet_guess_s, data->guesses, &new_guess);
+}
+
+static const struct target_desc *
+remote_read_description (struct target_ops *target)
+{
+ struct remote_g_packet_data *data
+ = gdbarch_data (current_gdbarch, remote_g_packet_data_handle);
+
+ if (!VEC_empty (remote_g_packet_guess_s, data->guesses))
+ {
+ struct remote_g_packet_guess *guess;
+ int ix;
+ int bytes = send_g_packet ();
+
+ for (ix = 0;
+ VEC_iterate (remote_g_packet_guess_s, data->guesses, ix, guess);
+ ix++)
+ if (guess->bytes == bytes)
+ return guess->tdesc;
+
+ /* We discard the g packet. A minor optimization would be to
+ hold on to it, and fill the register cache once we have selected
+ an architecture, but it's too tricky to do safely. */
+ }
+
+ return NULL;
+}
+
+/* Remote file transfer support. This is host-initiated I/O, not
+ target-initiated; for target-initiated, see remote-fileio.c. */
+
+/* If *LEFT is at least the length of STRING, copy STRING to
+ *BUFFER, update *BUFFER to point to the new end of the buffer, and
+ decrease *LEFT. Otherwise raise an error. */
+
+static void
+remote_buffer_add_string (char **buffer, int *left, char *string)
+{
+ int len = strlen (string);
+
+ if (len > *left)
+ error (_("Packet too long for target."));
+
+ memcpy (*buffer, string, len);
+ *buffer += len;
+ *left -= len;
+
+ /* NUL-terminate the buffer as a convenience, if there is
+ room. */
+ if (*left)
+ **buffer = '\0';
+}
+
+/* If *LEFT is large enough, hex encode LEN bytes from BYTES into
+ *BUFFER, update *BUFFER to point to the new end of the buffer, and
+ decrease *LEFT. Otherwise raise an error. */
+
+static void
+remote_buffer_add_bytes (char **buffer, int *left, const gdb_byte *bytes,
+ int len)
+{
+ if (2 * len > *left)
+ error (_("Packet too long for target."));
+
+ bin2hex (bytes, *buffer, len);
+ *buffer += 2 * len;
+ *left -= 2 * len;
+
+ /* NUL-terminate the buffer as a convenience, if there is
+ room. */
+ if (*left)
+ **buffer = '\0';
+}
+
+/* If *LEFT is large enough, convert VALUE to hex and add it to
+ *BUFFER, update *BUFFER to point to the new end of the buffer, and
+ decrease *LEFT. Otherwise raise an error. */
+
+static void
+remote_buffer_add_int (char **buffer, int *left, ULONGEST value)
+{
+ int len = hexnumlen (value);
+
+ if (len > *left)
+ error (_("Packet too long for target."));
+
+ hexnumstr (*buffer, value);
+ *buffer += len;
+ *left -= len;
+
+ /* NUL-terminate the buffer as a convenience, if there is
+ room. */
+ if (*left)
+ **buffer = '\0';
+}
+
+/* Parse an I/O result packet from BUFFER. Set RETCODE to the return
+ value, *REMOTE_ERRNO to the remote error number or zero if none
+ was included, and *ATTACHMENT to point to the start of the annex
+ if any. The length of the packet isn't needed here; there may
+ be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
+
+ Return 0 if the packet could be parsed, -1 if it could not. If
+ -1 is returned, the other variables may not be initialized. */
+
+static int
+remote_hostio_parse_result (char *buffer, int *retcode,
+ int *remote_errno, char **attachment)
+{
+ char *p, *p2;
+
+ *remote_errno = 0;
+ *attachment = NULL;
+
+ if (buffer[0] != 'F')
+ return -1;
+
+ errno = 0;
+ *retcode = strtol (&buffer[1], &p, 16);
+ if (errno != 0 || p == &buffer[1])
+ return -1;
+
+ /* Check for ",errno". */
+ if (*p == ',')
+ {
+ errno = 0;
+ *remote_errno = strtol (p + 1, &p2, 16);
+ if (errno != 0 || p + 1 == p2)
+ return -1;
+ p = p2;
+ }
+
+ /* Check for ";attachment". If there is no attachment, the
+ packet should end here. */
+ if (*p == ';')
+ {
+ *attachment = p + 1;
+ return 0;
+ }
+ else if (*p == '\0')
+ return 0;
+ else
+ return -1;
+}
+
+/* Send a prepared I/O packet to the target and read its response.
+ The prepared packet is in the global RS->BUF before this function
+ is called, and the answer is there when we return.
+
+ COMMAND_BYTES is the length of the request to send, which may include
+ binary data. WHICH_PACKET is the packet configuration to check
+ before attempting a packet. If an error occurs, *REMOTE_ERRNO
+ is set to the error number and -1 is returned. Otherwise the value
+ returned by the function is returned.
+
+ ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
+ attachment is expected; an error will be reported if there's a
+ mismatch. If one is found, *ATTACHMENT will be set to point into
+ the packet buffer and *ATTACHMENT_LEN will be set to the
+ attachment's length. */
+
+static int
+remote_hostio_send_command (int command_bytes, int which_packet,
+ int *remote_errno, char **attachment,
+ int *attachment_len)
+{
+ struct remote_state *rs = get_remote_state ();
+ int ret, bytes_read;
+ char *attachment_tmp;
+
+ if (remote_protocol_packets[which_packet].support == PACKET_DISABLE)
+ {
+ *remote_errno = FILEIO_ENOSYS;
+ return -1;
+ }
+
+ putpkt_binary (rs->buf, command_bytes);
+ bytes_read = getpkt_sane (&rs->buf, &rs->buf_size, 0);
+
+ /* If it timed out, something is wrong. Don't try to parse the
+ buffer. */
+ if (bytes_read < 0)
+ {
+ *remote_errno = FILEIO_EINVAL;
+ return -1;
+ }
+
+ switch (packet_ok (rs->buf, &remote_protocol_packets[which_packet]))
+ {
+ case PACKET_ERROR:
+ *remote_errno = FILEIO_EINVAL;
+ return -1;
+ case PACKET_UNKNOWN:
+ *remote_errno = FILEIO_ENOSYS;
+ return -1;
+ case PACKET_OK:
+ break;
+ }
+
+ if (remote_hostio_parse_result (rs->buf, &ret, remote_errno,
+ &attachment_tmp))
+ {
+ *remote_errno = FILEIO_EINVAL;
+ return -1;
+ }
+
+ /* Make sure we saw an attachment if and only if we expected one. */
+ if ((attachment_tmp == NULL && attachment != NULL)
+ || (attachment_tmp != NULL && attachment == NULL))
+ {
+ *remote_errno = FILEIO_EINVAL;
+ return -1;
+ }
+
+ /* If an attachment was found, it must point into the packet buffer;
+ work out how many bytes there were. */
+ if (attachment_tmp != NULL)
+ {
+ *attachment = attachment_tmp;
+ *attachment_len = bytes_read - (*attachment - rs->buf);
+ }
+
+ return ret;
+}
+
+/* Open FILENAME on the remote target, using FLAGS and MODE. Return a
+ remote file descriptor, or -1 if an error occurs (and set
+ *REMOTE_ERRNO). */
+
+static int
+remote_hostio_open (const char *filename, int flags, int mode,
+ int *remote_errno)
+{
+ struct remote_state *rs = get_remote_state ();
+ char *p = rs->buf;
+ int left = get_remote_packet_size () - 1;
+
+ remote_buffer_add_string (&p, &left, "vFile:open:");
+
+ remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
+ strlen (filename));
+ remote_buffer_add_string (&p, &left, ",");
+
+ remote_buffer_add_int (&p, &left, flags);
+ remote_buffer_add_string (&p, &left, ",");
+
+ remote_buffer_add_int (&p, &left, mode);
+
+ return remote_hostio_send_command (p - rs->buf, PACKET_vFile_open,
+ remote_errno, NULL, NULL);
+}
+
+/* Write up to LEN bytes from WRITE_BUF to FD on the remote target.
+ Return the number of bytes written, or -1 if an error occurs (and
+ set *REMOTE_ERRNO). */
+
+static int
+remote_hostio_pwrite (int fd, const gdb_byte *write_buf, int len,
+ ULONGEST offset, int *remote_errno)
+{
+ struct remote_state *rs = get_remote_state ();
+ char *p = rs->buf;
+ int left = get_remote_packet_size ();
+ int out_len;
+
+ remote_buffer_add_string (&p, &left, "vFile:pwrite:");
+
+ remote_buffer_add_int (&p, &left, fd);
+ remote_buffer_add_string (&p, &left, ",");
+
+ remote_buffer_add_int (&p, &left, offset);
+ remote_buffer_add_string (&p, &left, ",");
+
+ p += remote_escape_output (write_buf, len, p, &out_len,
+ get_remote_packet_size () - (p - rs->buf));
+
+ return remote_hostio_send_command (p - rs->buf, PACKET_vFile_pwrite,
+ remote_errno, NULL, NULL);
+}
+
+/* Read up to LEN bytes FD on the remote target into READ_BUF
+ Return the number of bytes read, or -1 if an error occurs (and
+ set *REMOTE_ERRNO). */
+
+static int
+remote_hostio_pread (int fd, gdb_byte *read_buf, int len,
+ ULONGEST offset, int *remote_errno)
+{
+ struct remote_state *rs = get_remote_state ();
+ char *p = rs->buf;
+ char *attachment;
+ int left = get_remote_packet_size ();
+ int ret, attachment_len;
+ int read_len;
+
+ remote_buffer_add_string (&p, &left, "vFile:pread:");
+
+ remote_buffer_add_int (&p, &left, fd);
+ remote_buffer_add_string (&p, &left, ",");
+
+ remote_buffer_add_int (&p, &left, len);
+ remote_buffer_add_string (&p, &left, ",");
+
+ remote_buffer_add_int (&p, &left, offset);
+
+ ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_pread,
+ remote_errno, &attachment,
+ &attachment_len);
+
+ if (ret < 0)
+ return ret;
+
+ read_len = remote_unescape_input (attachment, attachment_len,
+ read_buf, len);
+ if (read_len != ret)
+ error (_("Read returned %d, but %d bytes."), ret, (int) read_len);
+
+ return ret;
+}
+
+/* Close FD on the remote target. Return 0, or -1 if an error occurs
+ (and set *REMOTE_ERRNO). */
+
+static int
+remote_hostio_close (int fd, int *remote_errno)
+{
+ struct remote_state *rs = get_remote_state ();
+ char *p = rs->buf;
+ int left = get_remote_packet_size () - 1;
+
+ remote_buffer_add_string (&p, &left, "vFile:close:");
+
+ remote_buffer_add_int (&p, &left, fd);
+
+ return remote_hostio_send_command (p - rs->buf, PACKET_vFile_close,
+ remote_errno, NULL, NULL);
+}
+
+/* Unlink FILENAME on the remote target. Return 0, or -1 if an error
+ occurs (and set *REMOTE_ERRNO). */
+
+static int
+remote_hostio_unlink (const char *filename, int *remote_errno)
+{
+ struct remote_state *rs = get_remote_state ();
+ char *p = rs->buf;
+ int left = get_remote_packet_size () - 1;
+
+ remote_buffer_add_string (&p, &left, "vFile:unlink:");
+
+ remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
+ strlen (filename));
+
+ return remote_hostio_send_command (p - rs->buf, PACKET_vFile_unlink,
+ remote_errno, NULL, NULL);
+}
+
+static int
+remote_fileio_errno_to_host (int errnum)
+{
+ switch (errnum)
+ {
+ case FILEIO_EPERM:
+ return EPERM;
+ case FILEIO_ENOENT:
+ return ENOENT;
+ case FILEIO_EINTR:
+ return EINTR;
+ case FILEIO_EIO:
+ return EIO;
+ case FILEIO_EBADF:
+ return EBADF;
+ case FILEIO_EACCES:
+ return EACCES;
+ case FILEIO_EFAULT:
+ return EFAULT;
+ case FILEIO_EBUSY:
+ return EBUSY;
+ case FILEIO_EEXIST:
+ return EEXIST;
+ case FILEIO_ENODEV:
+ return ENODEV;
+ case FILEIO_ENOTDIR:
+ return ENOTDIR;
+ case FILEIO_EISDIR:
+ return EISDIR;
+ case FILEIO_EINVAL:
+ return EINVAL;
+ case FILEIO_ENFILE:
+ return ENFILE;
+ case FILEIO_EMFILE:
+ return EMFILE;
+ case FILEIO_EFBIG:
+ return EFBIG;
+ case FILEIO_ENOSPC:
+ return ENOSPC;
+ case FILEIO_ESPIPE:
+ return ESPIPE;
+ case FILEIO_EROFS:
+ return EROFS;
+ case FILEIO_ENOSYS:
+ return ENOSYS;
+ case FILEIO_ENAMETOOLONG:
+ return ENAMETOOLONG;
+ }
+ return -1;
+}
+
+static char *
+remote_hostio_error (int errnum)
+{
+ int host_error = remote_fileio_errno_to_host (errnum);
+
+ if (host_error == -1)
+ error (_("Unknown remote I/O error %d"), errnum);
+ else
+ error (_("Remote I/O error: %s"), safe_strerror (host_error));
+}
+
+static void
+fclose_cleanup (void *file)
+{
+ fclose (file);
+}
+
+static void
+remote_hostio_close_cleanup (void *opaque)
+{
+ int fd = *(int *) opaque;
+ int remote_errno;
+
+ remote_hostio_close (fd, &remote_errno);
+}
+
+void
+remote_file_put (const char *local_file, const char *remote_file, int from_tty)
+{
+ struct cleanup *back_to, *close_cleanup;
+ int retcode, fd, remote_errno, bytes, io_size;
+ FILE *file;
+ gdb_byte *buffer;
+ int bytes_in_buffer;
+ int saw_eof;
+ ULONGEST offset;
+
+ if (!remote_desc)
+ error (_("command can only be used with remote target"));
+
+ file = fopen (local_file, "rb");
+ if (file == NULL)
+ perror_with_name (local_file);
+ back_to = make_cleanup (fclose_cleanup, file);
+
+ fd = remote_hostio_open (remote_file, (FILEIO_O_WRONLY | FILEIO_O_CREAT
+ | FILEIO_O_TRUNC),
+ 0700, &remote_errno);
+ if (fd == -1)
+ remote_hostio_error (remote_errno);
+
+ /* Send up to this many bytes at once. They won't all fit in the
+ remote packet limit, so we'll transfer slightly fewer. */
+ io_size = get_remote_packet_size ();
+ buffer = xmalloc (io_size);
+ make_cleanup (xfree, buffer);
+
+ close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
+
+ bytes_in_buffer = 0;
+ saw_eof = 0;
+ offset = 0;
+ while (bytes_in_buffer || !saw_eof)
+ {
+ if (!saw_eof)
+ {
+ bytes = fread (buffer + bytes_in_buffer, 1, io_size - bytes_in_buffer,
+ file);
+ if (bytes == 0)
+ {
+ if (ferror (file))
+ error (_("Error reading %s."), local_file);
+ else
+ {
+ /* EOF. Unless there is something still in the
+ buffer from the last iteration, we are done. */
+ saw_eof = 1;
+ if (bytes_in_buffer == 0)
+ break;
+ }
+ }
+ }
+ else
+ bytes = 0;
+
+ bytes += bytes_in_buffer;
+ bytes_in_buffer = 0;
+
+ retcode = remote_hostio_pwrite (fd, buffer, bytes, offset, &remote_errno);
+
+ if (retcode < 0)
+ remote_hostio_error (remote_errno);
+ else if (retcode == 0)
+ error (_("Remote write of %d bytes returned 0!"), bytes);
+ else if (retcode < bytes)
+ {
+ /* Short write. Save the rest of the read data for the next
+ write. */
+ bytes_in_buffer = bytes - retcode;
+ memmove (buffer, buffer + retcode, bytes_in_buffer);
+ }
+
+ offset += retcode;
+ }
+
+ discard_cleanups (close_cleanup);
+ if (remote_hostio_close (fd, &remote_errno))
+ remote_hostio_error (remote_errno);
+
+ if (from_tty)
+ printf_filtered (_("Successfully sent file \"%s\".\n"), local_file);
+ do_cleanups (back_to);
+}
+
+void
+remote_file_get (const char *remote_file, const char *local_file, int from_tty)
+{
+ struct cleanup *back_to, *close_cleanup;
+ int retcode, fd, remote_errno, bytes, io_size;
+ FILE *file;
+ gdb_byte *buffer;
+ ULONGEST offset;
+
+ if (!remote_desc)
+ error (_("command can only be used with remote target"));
+
+ fd = remote_hostio_open (remote_file, FILEIO_O_RDONLY, 0, &remote_errno);
+ if (fd == -1)
+ remote_hostio_error (remote_errno);
+
+ file = fopen (local_file, "wb");
+ if (file == NULL)
+ perror_with_name (local_file);
+ back_to = make_cleanup (fclose_cleanup, file);
+
+ /* Send up to this many bytes at once. They won't all fit in the
+ remote packet limit, so we'll transfer slightly fewer. */
+ io_size = get_remote_packet_size ();
+ buffer = xmalloc (io_size);
+ make_cleanup (xfree, buffer);
+
+ close_cleanup = make_cleanup (remote_hostio_close_cleanup, &fd);
+
+ offset = 0;
+ while (1)
+ {
+ bytes = remote_hostio_pread (fd, buffer, io_size, offset, &remote_errno);
+ if (bytes == 0)
+ /* Success, but no bytes, means end-of-file. */
+ break;
+ if (bytes == -1)
+ remote_hostio_error (remote_errno);
+
+ offset += bytes;
+
+ bytes = fwrite (buffer, 1, bytes, file);
+ if (bytes == 0)
+ perror_with_name (local_file);
+ }
+
+ discard_cleanups (close_cleanup);
+ if (remote_hostio_close (fd, &remote_errno))
+ remote_hostio_error (remote_errno);
+
+ if (from_tty)
+ printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file);
+ do_cleanups (back_to);
+}
+
+void
+remote_file_delete (const char *remote_file, int from_tty)
+{
+ int retcode, remote_errno;
+
+ if (!remote_desc)
+ error (_("command can only be used with remote target"));
+
+ retcode = remote_hostio_unlink (remote_file, &remote_errno);
+ if (retcode == -1)
+ remote_hostio_error (remote_errno);
+
+ if (from_tty)
+ printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file);
+}
+
+static void
+remote_put_command (char *args, int from_tty)
+{
+ struct cleanup *back_to;
+ char **argv;
+
+ argv = buildargv (args);
+ if (argv == NULL)
+ nomem (0);
+ back_to = make_cleanup_freeargv (argv);
+ if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
+ error (_("Invalid parameters to remote put"));
+
+ remote_file_put (argv[0], argv[1], from_tty);
+
+ do_cleanups (back_to);
+}
+
+static void
+remote_get_command (char *args, int from_tty)
+{
+ struct cleanup *back_to;
+ char **argv;
+
+ argv = buildargv (args);
+ if (argv == NULL)
+ nomem (0);
+ back_to = make_cleanup_freeargv (argv);
+ if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
+ error (_("Invalid parameters to remote get"));
+
+ remote_file_get (argv[0], argv[1], from_tty);
+
+ do_cleanups (back_to);
+}
+
+static void
+remote_delete_command (char *args, int from_tty)
+{
+ struct cleanup *back_to;
+ char **argv;
+
+ argv = buildargv (args);
+ if (argv == NULL)
+ nomem (0);
+ back_to = make_cleanup_freeargv (argv);
+ if (argv[0] == NULL || argv[1] != NULL)
+ error (_("Invalid parameters to remote delete"));
+
+ remote_file_delete (argv[0], from_tty);
+
+ do_cleanups (back_to);
+}
+
+static void
+remote_command (char *args, int from_tty)
+{
+ help_list (remote_cmdlist, "remote ", -1, gdb_stdout);
+}
+
+static int
+remote_return_zero (void)
+{
+ return 0;
+}
+
projects / deliverable / binutils-gdb.git / blobdiff