What has changed in GDB?
(Organized release by release)
-*** Changes since GDB 7.2
+*** Changes since GDB 7.3
+
+* GDB has two new commands: "set remote hardware-watchpoint-length-limit"
+ and "show remote hardware-watchpoint-length-limit". These allows to
+ set or show the maximum length limit (in bytes) of a remote
+ target hardware watchpoint.
+
+ This allows e.g. to use "unlimited" hardware watchpoints with the
+ gdbserver integrated in Valgrind version >= 3.7.0. Such Valgrind
+ watchpoints are slower than real hardware watchpoints but are
+ significantly faster than gdb software watchpoints.
+
+* Python scripting
+
+ ** The "maint set python print-stack on|off" command has been
+ deprecated, and a new command: "set python print-stack on|off" has
+ replaced it. Additionally, the default for "print-stack" is now
+ "off".
+
+ ** A prompt subsitution hook (prompt_hook) is now available to the
+ Python API.
+
+* libthread-db-search-path now supports two special values: $sdir and $pdir.
+ $sdir specifies the default system locations of shared libraries.
+ $pdir specifies the directory where the libpthread used by the application
+ lives.
+
+ GDB no longer looks in $sdir and $pdir after it has searched the directories
+ mentioned in libthread-db-search-path. If you want to search those
+ directories, they must be specified in libthread-db-search-path.
+ The default value of libthread-db-search-path on GNU/Linux and Solaris
+ systems is now "$sdir:$pdir".
+
+ $pdir is not supported by gdbserver, it is currently ignored.
+ $sdir is supported by gdbserver.
+
+* New configure option --with-iconv-bin.
+ When using the internationalization support like the one in the GNU C
+ library, GDB will invoke the "iconv" program to get a list of supported
+ character sets. If this program lives in a non-standard location, one can
+ use this option to specify where to find it.
+
+* When natively debugging programs on PowerPC BookE processors running
+ a Linux kernel version 2.6.34 or later, GDB supports masked hardware
+ watchpoints, which specify a mask in addition to an address to watch.
+ The mask specifies that some bits of an address (the bits which are
+ reset in the mask) should be ignored when matching the address accessed
+ by the inferior against the watchpoint address. See the "PowerPC Embedded"
+ section in the user manual for more details.
+
+* The new option --once causes GDBserver to stop listening for connections once
+ the first connection is made. The listening port used by GDBserver will
+ become available after that.
+
+* New commands "info macros", and "info definitions" have been added.
+
+* Changed commands
+
+watch EXPRESSION mask MASK_VALUE
+ The watch command now supports the mask argument which allows creation
+ of masked watchpoints, if the current architecture supports this feature.
+
+info auto-load-scripts [REGEXP]
+ This command was formerly named "maintenance print section-scripts".
+ It is now generally useful and is no longer a maintenance-only command.
+
+* Tracepoints can now be enabled and disabled at any time after a trace
+ experiment has been started using the standard "enable" and "disable"
+ commands. It is now possible to start a trace experiment with no enabled
+ tracepoints; GDB will display a warning, but will allow the experiment to
+ begin, assuming that tracepoints will be enabled as needed while the trace
+ is running.
+
+* New remote packets
+
+QTEnable
+
+ Dynamically enable a tracepoint in a started trace experiment.
+
+QTDisable
+
+ Dynamically disable a tracepoint in a started trace experiment.
+
+* Dcache size (number of lines) and line-size are now runtime-configurable
+ via "set dcache line" and "set dcache line-size" commands.
+
+*** Changes in GDB 7.3
* GDB has a new command: "thread find [REGEXP]".
It finds the thread id whose name, target id, or thread extra info
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