Implement 'qXfer:exec-file:read' packet in Valgrind gdbserver.
Thanks to this packet, with recent GDB (>= 7.9.50.20150514-cvs), the
command 'target remote' will automatically load the executable file of
the process running under Valgrind. This means you do not need to
specify the executable file yourself, GDB will discover it itself.
See GDB documentation about 'qXfer:exec-file:read' packet for more
info.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@15230 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/coregrind/m_gdbserver/server.c b/coregrind/m_gdbserver/server.c
index deedddf..6fb507d 100644
--- a/coregrind/m_gdbserver/server.c
+++ b/coregrind/m_gdbserver/server.c
@@ -916,6 +916,63 @@
return;
}
+ if (strncmp ("qXfer:exec-file:read:", arg_own_buf, 21) == 0) {
+ unsigned char *data;
+ int n;
+ CORE_ADDR ofs;
+ unsigned int len;
+ const char *annex;
+ unsigned long pid;
+ const HChar *name;
+
+ /* Reject any annex; grab the offset and length. */
+ if (decode_xfer_read (arg_own_buf + 21, &annex, &ofs, &len) < 0) {
+ strcpy (arg_own_buf, "E00");
+ return;
+ }
+
+ if (strlen(annex) > 0)
+ pid = strtoul (annex, NULL, 16);
+ else
+ pid = 0;
+ if ((int)pid != VG_(getpid)() && pid != 0) {
+ VG_(sprintf) (arg_own_buf,
+ "E.Valgrind gdbserver pid is %d."
+ " Cannot give info for pid %d",
+ VG_(getpid)(), (int) pid);
+ return;
+ }
+
+ if (len > PBUFSIZ - 2)
+ len = PBUFSIZ - 2;
+ data = malloc (len);
+
+ if (!VG_(resolve_filename)(VG_(cl_exec_fd), &name)) {
+ VG_(sprintf) (arg_own_buf,
+ "E.Valgrind gdbserver could not"
+ " resolve pid %d exec filename.",
+ VG_(getpid)());
+ return;
+ }
+
+ if (ofs >= strlen(name))
+ n = -1;
+ else {
+ n = strlen(name) - ofs;
+ VG_(memcpy) (data, name, n);
+ }
+
+ if (n < 0)
+ write_enn (arg_own_buf);
+ else if (n > len)
+ *new_packet_len_p = write_qxfer_response (arg_own_buf, data, len, 1);
+ else
+ *new_packet_len_p = write_qxfer_response (arg_own_buf, data, n, 0);
+
+ free (data);
+
+ return;
+ }
/* Protocol features query. */
if (strncmp ("qSupported", arg_own_buf, 10) == 0
@@ -923,7 +980,7 @@
VG_(sprintf) (arg_own_buf, "PacketSize=%x", PBUFSIZ - 1);
/* Note: max packet size including frame and checksum, but without
trailing null byte, which is not sent/received. */
-
+
strcat (arg_own_buf, ";QStartNoAckMode+");
strcat (arg_own_buf, ";QPassSignals+");
if (VG_(client_auxv))
@@ -942,6 +999,7 @@
not properly connect. */
initialize_shadow_low(False);
}
+ strcat (arg_own_buf, ";qXfer:exec-file:read+");
return;
}