alloc gas seginfo on notes obstack

Lots of memory used in gas should go on this obstack.  The patch also
frees all the gas obstacks on exit, which isn't a completely trivial
task.

	* subsegs.c (alloc_seginfo): New function.
	(subseg_change, subseg_get): Use it.
	(subsegs_end): New function.
	* as.h (subsegs_end): Declare.
	* output-file.c: Include subsegs.h
	(stash_frchain_obs): New function.
	(output_file_close): Save obstacks attached to output bfd before
	closing.  Call subsegs_end with the array of obstacks.

1 files changed, 1 insertions, 0 deletions

diff --git a/gas/as.h b/gas/as.h
index 470a2e5..ec0c12a 100644
--- a/gas/as.h
+++ b/gas/as.h
@@ -476,6 +476,7 @@ void   input_scrub_end (void);
 void   new_logical_line (const char *, int);
 void   new_logical_line_flags (const char *, int, int);
 void   subsegs_begin (void);
+void   subsegs_end (struct obstack **);
 void   subseg_change (segT, int);
 segT   subseg_new (const char *, subsegT);
 segT   subseg_force_new (const char *, subsegT);