Implement a new BFD API function: bfd_is_target_special_symbol. Use this in nm

and objdump to skip the displaying of ARM Mapping symbols unless specifically
requested.

binutils/doc/binutils.texi

@@ -663,7 +663,7 @@ The @sc{gnu} linker @command{ld} is now described in a separate manual.
 nm [@option{-a}|@option{--debug-syms}] [@option{-g}|@option{--extern-only}]
    [@option{-B}] [@option{-C}|@option{--demangle}[=@var{style}]] [@option{-D}|@option{--dynamic}]
    [@option{-S}|@option{--print-size}] [@option{-s}|@option{--print-armap}]
-   [@option{-A}|@option{-o}|@option{--print-file-name}]
+   [@option{-A}|@option{-o}|@option{--print-file-name}][@option{--special-syms}]
    [@option{-n}|@option{-v}|@option{--numeric-sort}] [@option{-p}|@option{--no-sort}]
    [@option{-r}|@option{--reverse-sort}] [@option{--size-sort}] [@option{-u}|@option{--undefined-only}]
    [@option{-t} @var{radix}|@option{--radix=}@var{radix}] [@option{-P}|@option{--portability}]
@@ -879,6 +879,14 @@ value.  If the @code{bsd} output format is used the size of the symbol
 is printed, rather than the value, and @samp{-S} must be used in order 
 both size and value to be printed.
 
+@item --special-syms
+Display symbols which have a target-specific special meaning.  These
+symbols are usually used by the target for some special processing and
+are not normally helpful when included included in the normal symbol
+lists.  For example for ARM targets this option would skip the mapping
+symbols used to mark transistions between ARM code, THUMB code and
+data.
+
 @item -t @var{radix}
 @itemx --radix=@var{radix}
 Use @var{radix} as the radix for printing the symbol values.  It must be
@@ -1495,6 +1503,7 @@ objdump [@option{-a}|@option{--archive-headers}]
         [@option{--prefix-addresses}]
         [@option{--[no-]show-raw-insn}]
         [@option{--adjust-vma=}@var{offset}]
+        [@option{--special-syms}]
         [@option{-V}|@option{--version}]
         [@option{-H}|@option{--help}]
         @var{objfile}@dots{}
@@ -1837,6 +1846,11 @@ meaningful for dynamic objects, such as certain types of shared
 libraries.  This is similar to the information provided by the @samp{nm}
 program when given the @option{-D} (@option{--dynamic}) option.
 
+@item --special-syms
+When displaying symbols include those which the target considers to be
+special in some way and which would not normally be of interest to the
+user.
+
 @item -V
 @itemx --version
 Print the version number of @command{objdump} and exit.