[PATCH v3 23/24] Add NEWS entry.

[Luis Machado via Gdb-patches <gdb-patches@sourceware.org>]

Mention the new packets and memory tagging features.

gdb/ChangeLog:

YYYY-MM-DD  Luis Machado  <luis.machado@linaro.org>

	* NEWS: Mention memory tagging changes.
---
 gdb/NEWS | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/gdb/NEWS b/gdb/NEWS
index 3e08aee7c6..55af85528d 100644
--- a/gdb/NEWS
+++ b/gdb/NEWS
@@ -51,6 +51,19 @@ condition [-force] N COND
 
 *** Changes in GDB 10
 
+* GDB now supports general memory tagging functionality if the underlying
+  architecture supports the proper primitives and hooks.  Currently this is
+  enabled only for AArch64 MTE.
+
+  This includes additional information when the inferior crashes with a
+  SIGSEGV caused by a memory tag violation.
+
+* The "x" command supports the 'm' modifier to display allocation tags for
+  a particular memory range.
+
+* The "print" command displays memory tag mismatches for addresses and
+  pointers, if memory tagging is supported by the architecture.
+
 * There are new feature names for ARC targets: "org.gnu.gdb.arc.core"
   and "org.gnu.gdb.arc.aux".  The old names are still supported but
   must be considered obsolete.  They will be deprecated after some
@@ -133,8 +146,27 @@ condition [-force] N COND
 * On Windows targets, it is now possible to debug 32-bit programs with a
   64-bit GDB.
 
+* New remote packets
+
+qMemTags
+  Request the remote to send allocation tags for a particular memory range.
+QMemTags
+  Request the remote to store the specified allocation tags to the requested
+  memory range.
+
 * New commands
 
+mtag showltag ADDRESS
+  Show the logical tag for ADDRESS.
+mtag withltag ADDRESS TAG
+  Set the logical tag for ADDRESS to TAG.
+mtag showatag ADDRESS
+  Show the allocation tag for ADDRESS.
+mtag setatag ADDRESS LENGTH TAGS
+  Set the allocation tag for [ADDRESS, ADDRESS + LENGTH) to TAGS.
+mtag check ADDRESS
+  Validate that ADDRESS' logical tag matches the allocation tag.
+
 set exec-file-mismatch -- Set exec-file-mismatch handling (ask|warn|off).
 show exec-file-mismatch -- Show exec-file-mismatch handling (ask|warn|off).
   Set or show the option 'exec-file-mismatch'.  When GDB attaches to a
-- 
2.17.1