DWARF_ADD_AT_DATAREF(3) | Library Functions Manual | DWARF_ADD_AT_DATAREF(3)

# NAME

`dwarf_add_AT_dataref` —
create an attribute descriptor for a relocatable address

# LIBRARY

DWARF Access Library (libdwarf, -ldwarf)

# SYNOPSIS

`#include <libdwarf.h>`

Dwarf_P_Attribute
`dwarf_add_AT_dataref`(Dwarf_P_Debug dbg, Dwarf_P_Die die, Dwarf_Half attr, Dwarf_Unsigned pc_value, Dwarf_Unsigned sym_index, Dwarf_Error *err);

# DESCRIPTION

Function `dwarf_add_AT_dataref`() creates an attribute descriptor for a relocatable address and attaches it to the debugging information entry referenced by argument die.

If flag `DW_DLC_SIZE_64` is set, the address value will be 8 bytes in size and of the DWARF form `DW_FORM_data8`. Otherwise, the address value will be 4 bytes in size and of the DWARF form `DW_FORM_data4`.

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 specifies the attribute code of the created attribute descriptor.

Argument pc_value specifies the value of the relocatable address.

Argument sym_index specifies the ELF symbol index of the symbol to be used for relocation.

If argument err is not NULL, it will be used to store error information in case of an error.

# RETURN VALUES

On success, function `dwarf_add_AT_dataref`() returns the created attribute descriptor. In case of an error, function `dwarf_add_AT_dataref`() returns `DW_DLV_BADADDR` and sets the argument err.

# ERRORS

Function `dwarf_add_AT_dataref`() can fail with:

[`DW_DLE_ARGUMENT`]
  Either of the arguments dbg or die was NULL.
[`DW_DLE_MEMORY`]
  An out of memory condition was encountered during the execution of the function.

# SEE ALSO

dwarf(3), dwarf_add_AT_reference(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 | NetBSD 9.0