* gdb.texinfo (PowerPC Embedded): Mention support for the DVC register.

diff --git a/gdb/doc/ChangeLog b/gdb/doc/ChangeLog
index 36099c2..f5ae128 100644 (file)
--- a/gdb/doc/ChangeLog
+++ b/gdb/doc/ChangeLog
@@ -1,3 +1,7 @@
+2010-08-18  Thiago Jung Bauermann  <bauerman@br.ibm.com>
+
+       * gdb.texinfo (PowerPC Embedded): Mention support for the DVC register.
+
 2010-08-16   Tom Tromey  <tromey@redhat.com>
 
        * gdb.texinfo (Set Watchpoints): Document -location option.

diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
index fa50761..f493d59 100644 (file)
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -18472,6 +18472,19 @@ Set suspend trace mode.
 @node PowerPC Embedded
 @subsection PowerPC Embedded
 
+@cindex DVC register
+@value{GDBN} supports using the DVC (Data Value Compare) register to
+implement in hardware simple hardware watchpoint conditions of the form:
+
+@smallexample
+(@value{GDBP}) watch @var{ADDRESS|VARIABLE} \
+  if  @var{ADDRESS|VARIABLE} == @var{CONSTANT EXPRESSION}
+@end smallexample
+
+The DVC register will be automatically used whenever @value{GDBN} detects
+such pattern in a condition expression.  This feature is available in native
+@value{GDBN} running on a Linux kernel version 2.6.34 or newer.
+
 @value{GDBN} provides the following PowerPC-specific commands:
 
 @table @code