2011-11-15 Pedro Alves <pedro@codesourcery.com>

2011-11-15  Pedro Alves  <pedro@codesourcery.com>
	    Luis Machado  <lgustavo@codesourcery.com>

	* auxv.c: Include observer.h.
	(auxv_inferior_data_cleanup): New.
	(invalidate_auxv_cache_inf): New.
	(invalidate_auxv_cache): New.
	(get_auxv_inferior_data): New.
	(auxv_inferior_data): New static global.
	(auxv_info): New structure.
	(target_auxv_search): Use get_auxv_inferior_data instead of
	target_read_alloc and don't free cached buffers.
	(fprint_target_auxv): Likewise
	(_initialize_auxv): Register per-inferior auxv cache and register
	observers to invalidate auxv cache when needed.