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[RFA] Add dwarf to last_source_file comment.


Ok to check in?

2008-04-04  Doug Evans  <dje@google.com>

	* buildsym.h (last_source_file): Add dwarf info to comment.
	(last_source_start_addr): Ditto.

Index: buildsym.h
===================================================================
RCS file: /cvs/src/src/gdb/buildsym.h,v
retrieving revision 1.20
diff -u -p -u -p -r1.20 buildsym.h
--- buildsym.h	1 Jan 2008 22:53:09 -0000	1.20
+++ buildsym.h	4 Apr 2008 23:07:20 -0000
@@ -47,12 +47,14 @@ struct block;
 				   hashname() */
 
 /* Name of source file whose symbol data we are now processing.  This
-   comes from a symbol of type N_SO. */
+   comes from a symbol of type N_SO for stabs.  For Dwarf it comes from the
+   DW_AT_name attribute of a DW_TAG_compile_unit DIE.  */
 
 EXTERN char *last_source_file;
 
 /* Core address of start of text of current source file.  This too
-   comes from the N_SO symbol. */
+   comes from the N_SO symbol.  For Dwarf it typically comes from the
+   DW_AT_low_pc attribute of a DW_TAG_compile_unit DIE.  */
 
 EXTERN CORE_ADDR last_source_start_addr;
 


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