PERFORCE change 135421 for review

[John Birrell]

http://perforce.freebsd.org/chv.cgi?CH=135421

Change 135421 by jb at jb_freebsd1 on 2008/02/15 02:43:14

	Add an option to allow CTF data to be loaded with the ELF file.
	The CTF data has type information and for functions, the list
	or arguments too. This list is useful for the DTrace Function
	Boundary Trace (fbt) provider so that it can set the types for
	the functions it probes. Without this information, the arguments
	are uintptr_t's and have to be cast to a usable type.
	
	The CTF data is probably useful for DDB too and it may be useful
	even if the DTrace hooks aren't in the kernel.
	
	Of course the CTF data needs to be present as an ELF section in
	the file and it it isn't there, well, umm, life still needs to
	go on.
	
	So DDB_CTF tells the kernel to load TF data if it is there.

Affected files ...

.. //depot/projects/dtrace/src/sys/conf/options#40 edit

Differences ...

==== //depot/projects/dtrace/src/sys/conf/options#40 (text+ko) ====

@@ -50,6 +50,7 @@
 DDB
 DDB_CAPTURE_DEFAULTBUFSIZE	opt_ddb.h
 DDB_CAPTURE_MAXBUFSIZE	opt_ddb.h
+DDB_CTF		opt_ddb.h
 DDB_NUMSYM	opt_ddb.h
 GDB
 KDB		opt_global.h