gdb/

[deliverable/binutils-gdb.git] / gdb / doc / gdb.texinfo

diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
index efd969c98b7d5732931a365d6bc3cc8b09ff1ef2..3fc75441d18ce7f5e6e1daeb580a7be04edf427a 100644 (file)
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -6720,9 +6720,12 @@ an unrecognized tag.
 @cindex memory region attributes
 
 @dfn{Memory region attributes} allow you to describe special handling
-required by regions of your target's memory.  @value{GDBN} uses attributes
-to determine whether to allow certain types of memory accesses; whether to
-use specific width accesses; and whether to cache target memory.
+required by regions of your target's memory.  @value{GDBN} uses
+attributes to determine whether to allow certain types of memory
+accesses; whether to use specific width accesses; and whether to cache
+target memory.  By default the description of memory regions is
+fetched from the target (if the current target supports this), but the
+user can override the fetched regions.
 
 Defined memory regions can be individually enabled and disabled.  When a
 memory region is disabled, @value{GDBN} uses the default attributes when
@@ -6742,6 +6745,10 @@ monitored by @value{GDBN}.  Note that @var{upper} == 0 is a special
 case: it is treated as the the target's maximum memory address.
 (0xffff on 16 bit targets, 0xffffffff on 32 bit targets, etc.)
 
+@item mem auto
+Discard any user changes to the memory regions and use target-supplied
+regions, if available, or no regions if the target does not support.
+
 @kindex delete mem
 @item delete mem @var{nums}@dots{}
 Remove memory regions @var{nums}@dots{} from the list of regions