libdw: Add new function dwarf_cu_getdwarf.

In both systemtap and libabigail there is a need to get the actual Dwarf
underlying an Dwarf_Die or Dwarf_Attribute. Following a DIE reference
might end up in an alternate Dwarf since the addition of DWZ multifile
forms. Both Dwarf_Die and Dwarf_Attribute already contain a Dwarf_CU
handle. Add a function dwarf_cu_getdwarf to retrieve the underlying
Dwarf using the Dwarf_CU.

Signed-off-by: Mark Wielaard <[email protected]>

1 files changed, 4 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index b470b3d7..dd92265e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2014-08-15  Mark Wielaard  <[email protected]>
+
+	* NEWS: Add dwarf_cu_getdwarf.
+
 2014-07-18  Mark Wielaard  <[email protected]>
 
 	* configure.ac (AC_CHECK_TYPE): Test for struct user_regs_struct.