[RFA] Darwin: handle shared libraries in attached processes

[Joel Brobecker]

> 2011-09-27  Tristan Gingold  <gingold@adacore.com>
> 
> 	* target.h (enum target_object): Add TARGET_OBJECT_DARWIN_DYLD_INFO.
> 	* solib-darwin.c (DYLD_VERSION_MAX): Update number.
> 	(darwin_solib_get_all_image_info_addr_at_init): New function.
> 	(darwin_solib_read_all_image_info_addr): Likewise.
> 	(darwin_solib_create_inferior_hook): Use the above two functions.
> 	* darwin-nat.c (darwin_execvp): Renames retval to res.
> 	(darwin_read_write_inferior): Update comment.
> 	(darwin_read_dyld_info): New function.
> 	(darwin_xfer_partial): Handle DYLD_INFO.

This patch looks OK to me. Please go ahead and apply.

-- 
Joel