[patch v4 3/3] Documentation for the remove-symbol-file command.

[Nicolas Blanc <nicolas.blanc@intel.com>]

2013-04-05  Nicolas Blanc  <nicolas.blanc@intel.com>

	* NEWS: Add description of the remove-symbol-file command.
gdb/doc
	* gdb.texinfo (Commands to Specify Files): Add description
	of the remove-symbol-file command.

Signed-off-by: Nicolas Blanc <nicolas.blanc@intel.com>
---
 gdb/NEWS            |    5 +++++
 gdb/doc/gdb.texinfo |   31 +++++++++++++++++++++++++++++--
 2 files changed, 34 insertions(+), 2 deletions(-)

diff --git a/gdb/NEWS b/gdb/NEWS
index a23e8e3..34b4abf 100644
--- a/gdb/NEWS
+++ b/gdb/NEWS
@@ -31,6 +31,11 @@ maint set|show per-command time
 maint set|show per-command symtab
   Enable display of per-command gdb resource usage.
 
+remove-symbol-file ADDR
+  Remove all symbol information about the file loaded at the specified
+  address.  The address must match the beginning of the text section
+  of a file added by the user via the `add-symbol-file' command.
+
 * New options
 
 set remote trace-status-packet
diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
index ead00b4..f347e12 100644
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -16511,8 +16511,10 @@ section name and base address for that section.  You can specify any
 The symbol table of the file @var{filename} is added to the symbol table
 originally read with the @code{symbol-file} command.  You can use the
 @code{add-symbol-file} command any number of times; the new symbol data
-thus read keeps adding to the old.  To discard all old symbol data
-instead, use the @code{symbol-file} command without any arguments.
+thus read keeps adding to the old.
+
+Changes can be reverted using the command @code{remove-symbol-file},
+which takes as parameter the load address of the file to remove.
 
 @cindex relocatable object files, reading symbols from
 @cindex object files, relocatable, reading symbols from
@@ -16550,6 +16552,31 @@ way.
 
 @code{add-symbol-file} does not repeat if you press @key{RET} after using it.
 
+@kindex remove-symbol-file
+@item remove-symbol-file @var{address}
+The @code{remove-symbol-file} command removes all symbol information about
+the file loaded at @var{address}.  @var{address} must be an expression that
+represents the address of the text section of a file added by the user via
+the @code{add-symbol-file} command.  In other words, the file to remove is
+identified by the first address parameter of the @code{add-symbol-file}
+command:
+
+@smallexample
+(gdb) add-symbol-file /home/user/gdb/mylib.so 0x7ffff7ff9480
+add symbol table from file "/home/user/gdb/mylib.so" at
+    .text_addr = 0x7ffff7ff9480
+(y or n) y
+Reading symbols from /home/user/gdb/mylib.so...done.
+(gdb) remove-symbol-file 0x7ffff7ff9480
+Remove symbol table from file "/home/user/gdb/mylib.so" at\
+ .text_addr = 0x7ffff7ff9480
+(y or n) y
+(gdb)
+@end smallexample
+
+
+@code{remove-symbol-file} does not repeat if you press @key{RET} after using it.
+
 @kindex add-symbol-file-from-memory
 @cindex @code{syscall DSO}
 @cindex load symbols from memory
-- 
1.7.6.5