These functions return the offsets associated with a DWARF attribute
descriptor.
Function
dwarf_formref()
returns the compilation unit relative offset of the descriptor
referenced by argument
attr
in the location pointed to by argument
retoffset.
Argument
attr
must be a reference that is local to a compilation unit.
Permitted forms for argument
attr
are
DW_FORM_ref1,
DW_FORM_ref2,
DW_FORM_ref4,
DW_FORM_ref8
and
DW_FORM_ref_udata.
Function
dwarf_global_formref()
returns the section-relative offset of the descriptor referenced by
argument
attr
in the location pointed to by argument
retoffset.
Argument
attr
should be a legal
REFERENCE
class form.
Permitted forms for argument
attr
are:
DW_FORM_ref_addr,
DW_FORM_ref_udata,
DW_FORM_ref1,
DW_FORM_ref2,
DW_FORM_ref4,
DW_FORM_ref8
and
DW_FORM_sec_offset.
The returned offset is relative to the start of the
".debug_info"
ELF section.
If argument
err
is not NULL, it will be used to return an error descriptor in case
of an error.