PR10388 Support DW_OP_call_frame_cfa.

Depends on elfutils 0.142 cfi support.

* loc2c.h (c_translate_location): Take (optional) Dwarf_Op *cfa_ops.
* loc2c.c (translate): Recognize DW_OP_call_frame_cfa.
  (location_from_address): Take cfa_ops, examine fb_ops, if it is
  DW_OP_call_frame_cfa, pass cfa_ops to translate instead.
  (location_relative): Take cfa_ops, pass to location_from_address.
  (c_translate_location): Take cfa_ops, pass to location_from_address.
* loc2c-test.c (handle_variable): Take cfa_ops, pass to c_translate_location
  when needed.
  (main): Fetch cfa_ops, pass to handle_variable.
* dwflpp.h (struct dwflpp): Add new method get_cfa_ops.
* dwflpp.cxx: Include elfutils/version.h.
  (translate_location): Fetch cfa_ops when necessary.
  (get_cfa_ops): New method.

1 files changed, 4 insertions, 2 deletions

diff --git a/loc2c.h b/loc2c.h
index eb1f39d6..449d4499 100644
--- a/loc2c.h
+++ b/loc2c.h
@@ -11,7 +11,8 @@ struct location;		/* Opaque */
 /* Translate a C fragment for the location expression, using *INPUT
    as the starting location, begin from scratch if *INPUT is null.
    If DW_OP_fbreg is used, it may have a subfragment computing from
-   the FB_ATTR location expression.
+   the FB_ATTR location expression. The call_frame might need to be
+   calculated by the cfa_ops for the given pc_address.
 
    On errors, call FAIL, which should not return.  Any later errors will use
    FAIL and FAIL_ARG from the first c_translate_location call.
@@ -34,7 +35,8 @@ struct location *c_translate_location (struct obstack *,
 				       const Dwarf_Op *locexpr,
 				       size_t locexprlen,
 				       struct location **input,
-				       Dwarf_Attribute *fb_attr);
+				       Dwarf_Attribute *fb_attr,
+				       const Dwarf_Op *cfa_ops);
 
 /* Translate a fragment to dereference the given DW_TAG_pointer_type DIE,
    where *INPUT is the location of the pointer with that type.  */