[binutils-gdb] gdb, btrace: support libipt v2.2 events

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=06dc564fcc4a2cdb40d6572c8ba36cbb12904e26

commit 06dc564fcc4a2cdb40d6572c8ba36cbb12904e26
Author: Markus Metzger <[email protected]>
Date:   Thu Nov 20 11:21:41 2025 +0000

    gdb, btrace: support libipt v2.2 events
    
    Add support for printing new events added in libipt v2.2 originating from
    Event Tracing in combination with Flexible Return and Event Delivery
    (FRED) and from Trigger Tracing.
    
    Reviewed-By: Keith Seitz <[email protected]>
    Reviewed-By: Eli Zaretskii <[email protected]>

Diff:
---
 gdb/NEWS     |  4 ++++
 gdb/btrace.c | 69 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 73 insertions(+)

diff --git a/gdb/NEWS b/gdb/NEWS
index 7c8cf9af4c2..d5214a98a57 100644
--- a/gdb/NEWS
+++ b/gdb/NEWS
@@ -83,6 +83,10 @@
 
 * Support for native Thread Local Storage (TLS) variables on Windows.
 
+* GDB now supports libipt v2.2 events originating from Event Tracing (set
+  record btrace pt event-tracing on) on a FRED-enabled system and from
+  Trigger Tracing.
+
 * Configure changes
 
 ** --with-babeltrace has been removed.  The babeltrace library was
diff --git a/gdb/btrace.c b/gdb/btrace.c
index 965e2654c7d..5349a89001a 100644
--- a/gdb/btrace.c
+++ b/gdb/btrace.c
@@ -1597,6 +1597,61 @@ handle_pt_insn_events (struct btrace_thread_info *btinfo,
 	    break;
 	  }
 #endif /* (LIBIPT_VERSION >= 0x201) */
+
+#if (LIBIPT_VERSION >= 0x202)
+	case ptev_trig:
+	  {
+	    std::string aux_string
+	      = (std::string (_("trig: trbv = "))
+		 + hex_string (event.variant.trig.trbv));
+
+	    if (event.variant.trig.mult != 0)
+	      aux_string += std::string (", mult");
+
+	    if (event.ip_suppressed == 0)
+	      {
+		pc = event.variant.trig.ip;
+		aux_string += (std::string (", ip = ") + hex_string (*pc));
+	      }
+
+	    if (event.variant.trig.icnt != 0)
+	      aux_string += (std::string (", icnt = ")
+			     + hex_string (event.variant.trig.icnt));
+
+	    handle_pt_aux_insn (btinfo, aux_string, pc);
+	    break;
+	  }
+
+	case ptev_swintr:
+	  {
+	    std::string aux_string
+	      = (std::string (_("swintr: vector = "))
+		 + hex_string (event.variant.swintr.vector));
+
+	    if (event.ip_suppressed == 0)
+	      {
+		pc = event.variant.swintr.ip;
+		aux_string += (std::string (", ip = ") + hex_string (*pc));
+	      }
+
+	    handle_pt_aux_insn (btinfo, aux_string, pc);
+	    break;
+	  }
+
+	case ptev_syscall:
+	  {
+	    std::string aux_string = std::string (_("syscall"));
+
+	    if (event.ip_suppressed == 0)
+	      {
+		pc = event.variant.syscall.ip;
+		aux_string += (std::string (": ip = ") + hex_string (*pc));
+	      }
+
+	    handle_pt_aux_insn (btinfo, aux_string, pc);
+	    break;
+	  }
+#endif /* (LIBIPT_VERSION >= 0x202) */
 	}
     }
 #endif /* defined (HAVE_PT_INSN_EVENT) */
@@ -3025,6 +3080,20 @@ pt_print_packet (const struct pt_packet *packet)
 		  packet->payload.evd.payload);
       break;
 #endif /* (LIBIPT_VERSION >= 0x201)  */
+
+#if (LIBIPT_VERSION >= 0x202)
+    case ppt_trig:
+      if (packet->payload.trig.icntv == 0)
+	gdb_printf ("trig 0x%x%s%s", packet->payload.trig.trbv,
+		    (packet->payload.trig.ip != 0) ? " ip" : "",
+		    (packet->payload.trig.mult != 0) ? " mult" : "");
+      else
+	gdb_printf ("trig 0x%x%s%s icnt: %u", packet->payload.trig.trbv,
+		    (packet->payload.trig.ip != 0) ? " ip" : "",
+		    (packet->payload.trig.mult != 0) ? " mult" : "",
+		    packet->payload.trig.icnt);
+      break;
+#endif /* (LIBIPT_VERSION >= 0x202)  */
     }
 }