* corefile.c (num_of_syms_in): New function - computes the number

        of symbols in a given file.
        (core_create_syms_from): New function - populates a symbol table
        from the symbols found in a specified file.
        * corefile.h: Prototype core_create_syms_from.
        * gprof.c (long_options): Add --external-symbol-table.
        (usage): Mention it.
        (main): Initiailize external_symbol_table from
        --external-symbol-table option.  If set use it.
        * gprof.texi: Document the new option.

        * NEWS: Mention new feature added to gprof.

1 files changed, 12 insertions, 4 deletions

diff --git a/gprof/gprof.texi b/gprof/gprof.texi
index 1f86383de7..058d5e7026 100644
--- a/gprof/gprof.texi
+++ b/gprof/gprof.texi
@@ -1,7 +1,7 @@
 \input texinfo @c -*-texinfo-*-
 @setfilename gprof.info
 @c Copyright 1988, 1992, 1993, 1998, 1999, 2000, 2001, 2002, 2003,
-@c 2004, 2007, 2008
+@c 2004, 2007, 2008, 2009
 @c Free Software Foundation, Inc.
 @settitle GNU gprof
 @setchapternewpage odd
@@ -24,7 +24,7 @@ END-INFO-DIR-ENTRY
 This file documents the gprof profiler of the GNU system.
 
 @c man begin COPYRIGHT
-Copyright @copyright{} 1988, 92, 97, 98, 99, 2000, 2001, 2003, 2007, 2008 Free Software Foundation, Inc.
+Copyright @copyright{} 1988, 92, 97, 98, 99, 2000, 2001, 2003, 2007, 2008, 2009 Free Software Foundation, Inc.
 
 Permission is granted to copy, distribute and/or modify this document
 under the terms of the GNU Free Documentation License, Version 1.3
@@ -57,7 +57,7 @@ execute programs.  @sc{gnu} @code{gprof} was written by Jay Fenlason.
 Eric S. Raymond made some minor corrections and additions in 2003.
 
 @vskip 0pt plus 1filll
-Copyright @copyright{} 1988, 92, 97, 98, 99, 2000, 2003, 2008 Free Software Foundation, Inc.
+Copyright @copyright{} 1988, 92, 97, 98, 99, 2000, 2003, 2008, 2009 Free Software Foundation, Inc.
 
       Permission is granted to copy, distribute and/or modify this document
       under the terms of the GNU Free Documentation License, Version 1.3
@@ -128,7 +128,8 @@ gprof [ -[abcDhilLrsTvwxyz] ] [ -[ACeEfFJnNOpPqQZ][@var{name}] ]
  [ --static-call-graph ] [ --sum ] [ --table-length=@var{len} ]
  [ --traditional ] [ --version ] [ --width=@var{n} ]
  [ --ignore-non-functions ] [ --demangle[=@var{STYLE}] ]
- [ --no-demangle ] [ @var{image-file} ] [ @var{profile-file} @dots{} ]
+ [ --no-demangle ] [--external-symbol-table=name] 
+ [ @var{image-file} ] [ @var{profile-file} @dots{} ]
 @c man end
 @end smallexample
 
@@ -725,6 +726,13 @@ to only propagate times for symbols matching @var{symspec}.
 The @samp{-n} option causes @code{gprof}, in its call graph analysis,
 not to propagate times for symbols matching @var{symspec}.
 
+@item -S@var{filename}
+@itemx --external-symbol-table=@var{filename}
+The @samp{-S} option causes @code{gprof} to read an external symbol table
+file, such as @file{/proc/kallsyms}, rather than read the symbol table 
+from the given object file (the default is @code{a.out}). This is useful 
+for profiling kernel modules.
+
 @item -z
 @itemx --display-unused-functions
 If you give the @samp{-z} option, @code{gprof} will mention all