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FreeBSD 11.0 - man page for dwarf_add_at_reference (freebsd section 3)

DWARF_ADD_AT_REFERENCE(3)				   BSD Library Functions Manual 				 DWARF_ADD_AT_REFERENCE(3)

dwarf_add_AT_reference -- create and attach an attribute that references another DIE
DWARF Access Library (libdwarf, -ldwarf)
#include <libdwarf.h> Dwarf_P_Attribute dwarf_add_AT_reference(Dwarf_P_Debug dbg, Dwarf_P_Die die, Dwarf_Half attr, Dwarf_P_Die ref_die, Dwarf_Error *err);
Function dwarf_add_AT_reference() creates an attribute descriptor that references another debugging information entry in the same compilation unit. The attribute will be of DWARF form DW_FORM_ref4 or DW_FORM_ref8 depending on the target address size, and will contain the section- relative offset of the referenced debugging information entry as its value. Argument dbg should reference a DWARF producer instance allocated using dwarf_producer_init(3) or dwarf_producer_init_b(3). Argument die should reference a debugging information entry allocated using dwarf_new_die(3). Argument attr should specify the attribute code of the created attribute descriptor. Argument ref_die should hold the debugging information entry descriptor that the attribute should refer to. If argument err is not NULL, it will be used to store error information in case of an error.
On success, function dwarf_add_AT_reference() returns the created attribute descriptor. In case of an error, function dwarf_add_AT_reference() returns DW_DLV_BADADDR and sets the argument err.
Function dwarf_add_AT_reference() can fail with: [DW_DLE_ARGUMENT] One of the arguments dbg, die or ref_die was NULL. [DW_DLE_MEMORY] An out of memory condition was encountered during the execution of the function.
dwarf(3), dwarf_add_AT_dataref(3), dwarf_add_AT_ref_address(3), dwarf_add_AT_signed_const(3), dwarf_add_AT_unsigned_const(3), dwarf_new_die(3), dwarf_producer_init(3), dwarf_producer_init_b(3)
September 4, 2011 BSD