Only try to print 1 word of compound objects.
Try to use crash module namelist to resolve module debuginfo.
Add xbt_dwarf_tag_name(), xbt_dwarf_attr_name(),
xbt_dwarf_byte_size(), xbt_dwarf_get_file(), and xbt_dwarf_var_print()
to the frame printing code.
Add xbt_dwarf_get_line() to frame printing code.
Add xbt_crash.h.
Add xbt_dwfl.c.
Add xcu.
Add xscope.
Print tag names in xscope.
Don't include bfd.h in xbt_dwfl.h.
Add DW_OP.x.
Add xcall to xbt_dwfl.c.
Add xbt_dwarf.[ch].
Add CFA handling.
Read task stack and evaluate CFI.
Add xbt_context.
Remove xf_frame_base.
Remove unused xf_stack_{base,start,end}.
Move xbt_dwarf_byte_size to xbt_dwarf.[ch].
Be more optimistic when restoring callee sav registers.