Add support for unbuffered and zero sized Guile ports.

[deliverable/binutils-gdb.git] / gdb / doc / guile.texi

diff --git a/gdb/doc/guile.texi b/gdb/doc/guile.texi
index 04572fd9467fa3ad372deb8874ac0c36dd94b531..a0147c1873c4a978c6984aa511a51d1fde294cee 100644 (file)
--- a/gdb/doc/guile.texi
+++ b/gdb/doc/guile.texi
@@ -3525,11 +3525,13 @@ returns a port object.  One can then read/write memory using that object.
 @deffn {Scheme Procedure} open-memory @r{[}#:mode mode{]} @r{[}#:start address{]} @r{[}#:size size{]}
 Return a port object that can be used for reading and writing memory.
 The port will be open according to @var{mode}, which is the standard
-mode argument to Guile port open routines, except that it is
-restricted to one of @samp{"r"}, @samp{"w"}, or @samp{"r+"}.  For
-compatibility @samp{"b"} (binary) may also be present, but we ignore
-it: memory ports are binary only.  The default is @samp{"r"},
-read-only.
+mode argument to Guile port open routines, except that the @samp{"a"}
+and @samp{"l"} modes are not supported.
+@xref{File Ports,,, guile, GNU Guile Reference Manual}.
+The @samp{"b"} (binary) character may be present, but is ignored:
+memory ports are binary only.  If @samp{"0"} is appended then
+the port is marked as unbuffered.
+The default is @samp{"r"}, read-only and buffered.
 
 The chunk of memory that can be accessed can be bounded.
 If both @var{start} and @var{size} are unspecified, all of memory can be