btrace: support Intel(R) Processor Trace

[deliverable/binutils-gdb.git] / gdb / remote.c

diff --git a/gdb/remote.c b/gdb/remote.c
index f15d75efc1e9d4881eed38e391760f98309fea80..9d97f6b18a6c84d78fd254403ae42ff0c68bd27e 100644 (file)
--- a/gdb/remote.c
+++ b/gdb/remote.c
@@ -1322,6 +1322,7 @@ enum {
   PACKET_QTBuffer_size,
   PACKET_Qbtrace_off,
   PACKET_Qbtrace_bts,
+  PACKET_Qbtrace_pt,
   PACKET_qXfer_btrace,
 
   /* Support for the QNonStop packet.  */
@@ -1362,6 +1363,9 @@ enum {
   /* Support for vfork events.  */
   PACKET_vfork_event_feature,
 
+  /* Support for the Qbtrace-conf:pt:size packet.  */
+  PACKET_Qbtrace_conf_pt_size,
+
   PACKET_MAX
 };
 
@@ -4145,6 +4149,7 @@ static const struct protocol_feature remote_protocol_features[] = {
   { "tracenz", PACKET_DISABLE, remote_supported_packet, PACKET_tracenz_feature },
   { "Qbtrace:off", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_off },
   { "Qbtrace:bts", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_bts },
+  { "Qbtrace:pt", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_pt },
   { "qXfer:btrace:read", PACKET_DISABLE, remote_supported_packet,
     PACKET_qXfer_btrace },
   { "qXfer:btrace-conf:read", PACKET_DISABLE, remote_supported_packet,
@@ -4157,6 +4162,8 @@ static const struct protocol_feature remote_protocol_features[] = {
     PACKET_fork_event_feature },
   { "vfork-events", PACKET_DISABLE, remote_supported_packet,
     PACKET_vfork_event_feature },
+  { "Qbtrace-conf:pt:size", PACKET_DISABLE, remote_supported_packet,
+    PACKET_Qbtrace_conf_pt_size }
 };
 
 static char *remote_support_xml;
@@ -10538,8 +10545,7 @@ remote_filesystem_is_local (struct target_ops *self)
      this case we treat the remote filesystem as local if the
      sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
      does not support vFile:open.  */
-  if (gdb_sysroot != NULL
-      && strcmp (gdb_sysroot, TARGET_SYSROOT_PREFIX) == 0)
+  if (strcmp (gdb_sysroot, TARGET_SYSROOT_PREFIX) == 0)
     {
       enum packet_support ps = packet_support (PACKET_vFile_open);
 
@@ -11884,6 +11890,15 @@ remote_supports_btrace (struct target_ops *self, enum btrace_format format)
 
       case BTRACE_FORMAT_BTS:
        return (packet_support (PACKET_Qbtrace_bts) == PACKET_ENABLE);
+
+      case BTRACE_FORMAT_PT:
+       /* The trace is decoded on the host.  Even if our target supports it,
+          we still need to have libipt to decode the trace.  */
+#if defined (HAVE_LIBIPT)
+       return (packet_support (PACKET_Qbtrace_pt) == PACKET_ENABLE);
+#else /* !defined (HAVE_LIBIPT)  */
+       return 0;
+#endif /* !defined (HAVE_LIBIPT)  */
     }
 
   internal_error (__FILE__, __LINE__, _("Unknown branch trace format"));
@@ -11923,6 +11938,28 @@ btrace_sync_conf (const struct btrace_config *conf)
 
       rs->btrace_config.bts.size = conf->bts.size;
     }
+
+  packet = &remote_protocol_packets[PACKET_Qbtrace_conf_pt_size];
+  if (packet_config_support (packet) == PACKET_ENABLE
+      && conf->pt.size != rs->btrace_config.pt.size)
+    {
+      pos = buf;
+      pos += xsnprintf (pos, endbuf - pos, "%s=0x%x", packet->name,
+                        conf->pt.size);
+
+      putpkt (buf);
+      getpkt (&buf, &rs->buf_size, 0);
+
+      if (packet_ok (buf, packet) == PACKET_ERROR)
+       {
+         if (buf[0] == 'E' && buf[1] == '.')
+           error (_("Failed to configure the trace buffer size: %s"), buf + 2);
+         else
+           error (_("Failed to configure the trace buffer size."));
+       }
+
+      rs->btrace_config.pt.size = conf->pt.size;
+    }
 }
 
 /* Read the current thread's btrace configuration from the target and
@@ -11934,7 +11971,7 @@ btrace_read_config (struct btrace_config *conf)
   char *xml;
 
   xml = target_read_stralloc (&current_target,
-                              TARGET_OBJECT_BTRACE_CONF, "");
+                             TARGET_OBJECT_BTRACE_CONF, "");
   if (xml != NULL)
     {
       struct cleanup *cleanup;
@@ -11952,12 +11989,23 @@ remote_enable_btrace (struct target_ops *self, ptid_t ptid,
                      const struct btrace_config *conf)
 {
   struct btrace_target_info *tinfo = NULL;
-  struct packet_config *packet = &remote_protocol_packets[PACKET_Qbtrace_bts];
+  struct packet_config *packet = NULL;
   struct remote_state *rs = get_remote_state ();
   char *buf = rs->buf;
   char *endbuf = rs->buf + get_remote_packet_size ();
 
-  if (packet_config_support (packet) != PACKET_ENABLE)
+  switch (conf->format)
+    {
+      case BTRACE_FORMAT_BTS:
+       packet = &remote_protocol_packets[PACKET_Qbtrace_bts];
+       break;
+
+      case BTRACE_FORMAT_PT:
+       packet = &remote_protocol_packets[PACKET_Qbtrace_pt];
+       break;
+    }
+
+  if (packet == NULL || packet_config_support (packet) != PACKET_ENABLE)
     error (_("Target does not support branch tracing."));
 
   btrace_sync_conf (conf);
@@ -12079,7 +12127,7 @@ remote_read_btrace (struct target_ops *self,
     }
 
   xml = target_read_stralloc (&current_target,
-                              TARGET_OBJECT_BTRACE, annex);
+                             TARGET_OBJECT_BTRACE, annex);
   if (xml == NULL)
     return BTRACE_ERR_UNKNOWN;
 
@@ -12883,7 +12931,10 @@ Show the maximum size of the address (in bits) in a memory packet."), NULL,
        "Qbtrace:off", "disable-btrace", 0);
 
   add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_bts],
-       "Qbtrace:bts", "enable-btrace", 0);
+       "Qbtrace:bts", "enable-btrace-bts", 0);
+
+  add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_pt],
+       "Qbtrace:pt", "enable-btrace-pt", 0);
 
   add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_btrace],
        "qXfer:btrace", "read-btrace", 0);
@@ -12906,6 +12957,9 @@ Show the maximum size of the address (in bits) in a memory packet."), NULL,
   add_packet_config_cmd (&remote_protocol_packets[PACKET_vfork_event_feature],
                         "vfork-event-feature", "vfork-event-feature", 0);
 
+  add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_conf_pt_size],
+       "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
+
   /* Assert that we've registered "set remote foo-packet" commands
      for all packet configs.  */
   {