+ if (offset + len > total_len)
+ len = total_len - offset;
+
+ memcpy (readbuf, document + offset, len);
+ free (document);
+ return len;
+}
+
+/* Handle qXfer:libraries-svr4:read. */
+
+static int
+handle_qxfer_libraries_svr4 (const char *annex,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
+{
+ if (writebuf != NULL)
+ return -2;
+
+ if (annex[0] != '\0' || !target_running ()
+ || the_target->qxfer_libraries_svr4 == NULL)
+ return -1;
+
+ return the_target->qxfer_libraries_svr4 (annex, readbuf, writebuf, offset, len);
+}
+
+/* Handle qXfer:osadata:read. */
+
+static int
+handle_qxfer_osdata (const char *annex,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
+{
+ if (the_target->qxfer_osdata == NULL || writebuf != NULL)
+ return -2;
+
+ return (*the_target->qxfer_osdata) (annex, readbuf, NULL, offset, len);
+}
+
+/* Handle qXfer:siginfo:read and qXfer:siginfo:write. */
+
+static int
+handle_qxfer_siginfo (const char *annex,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
+{
+ if (the_target->qxfer_siginfo == NULL)
+ return -2;
+
+ if (annex[0] != '\0' || !target_running ())
+ return -1;
+
+ return (*the_target->qxfer_siginfo) (annex, readbuf, writebuf, offset, len);
+}
+
+/* Handle qXfer:spu:read and qXfer:spu:write. */
+
+static int
+handle_qxfer_spu (const char *annex,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
+{
+ if (the_target->qxfer_spu == NULL)
+ return -2;
+
+ if (!target_running ())
+ return -1;
+
+ return (*the_target->qxfer_spu) (annex, readbuf, writebuf, offset, len);
+}
+
+/* Handle qXfer:statictrace:read. */
+
+static int
+handle_qxfer_statictrace (const char *annex,
+ gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
+{
+ ULONGEST nbytes;
+
+ if (writebuf != NULL)
+ return -2;
+
+ if (annex[0] != '\0' || !target_running () || current_traceframe == -1)
+ return -1;
+
+ if (traceframe_read_sdata (current_traceframe, offset,
+ readbuf, len, &nbytes))
+ return -1;
+ return nbytes;
+}
+
+/* Helper for handle_qxfer_threads. */
+
+static void
+handle_qxfer_threads_proper (struct buffer *buffer)
+{
+ struct inferior_list_entry *thread;
+
+ buffer_grow_str (buffer, "<threads>\n");
+
+ for (thread = all_threads.head; thread; thread = thread->next)