xref: /freebsd/contrib/elftoolchain/libdwarf/dwarf_add_AT_ref_address.3 (revision ae500c1ff8974130f7f2692772cf288b90349e0d)

.\" Copyright (c) 2011 Kai Wang
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.\" $Id: dwarf_add_AT_ref_address.3 3640 2018-10-14 14:09:13Z jkoshy $
.\"
.Dd September 7, 2011
.Dt DWARF_ADD_AT_REF_ADDRESS 3
.Os
.Sh NAME
.Nm dwarf_add_AT_ref_address
.Nd create a reference class attribute descriptor
.Sh LIBRARY
.Lb libdwarf
.Sh SYNOPSIS
.In libdwarf.h
.Ft "Dwarf_P_Attribute"
.Fo dwarf_add_AT_ref_address
.Fa "Dwarf_P_Debug dbg"
.Fa "Dwarf_P_Die die"
.Fa "Dwarf_Half attr"
.Fa "Dwarf_Unsigned pc_value"
.Fa "Dwarf_Unsigned sym_index"
.Fa "Dwarf_Error *err"
.Fc
.Sh DESCRIPTION
Function
.Fn dwarf_add_AT_ref_address
creates a
.Sq reference
class attribute descriptor containing a relocatable address value.
The created attribute will use DWARF form
.Dv DW_FORM_ref_addr .
.Pp
Argument
.Ar dbg
should reference a DWARF producer instance allocated using
.Xr dwarf_producer_init 3
or
.Xr dwarf_producer_init_b 3 .
.Pp
Argument
.Ar die
should reference a debugging information entry allocated using
.Xr dwarf_new_die 3 .
.Pp
Argument
.Ar attr
specifies the attribute code of the created attribute.
.Pp
Argument
.Ar pc_value
contains a relocatable address which will become the value of the
created attribute.
.Pp
Argument
.Ar sym_index
should specify the ELF symbol index of the symbol to be used when
relocating the address value.
.Pp
If argument
.Ar err
is not NULL, it will be used to store error information in case
of an error.
.Sh RETURN VALUES
On success, function
.Fn dwarf_add_AT_ref_address
returns the created attribute descriptor.
In case of an error, function
.Fn dwarf_add_AT_ref_address
returns
.Dv DW_DLV_BADADDR
and sets the argument
.Ar err .
.Sh ERRORS
Function
.Fn dwarf_add_AT_ref_address
can fail with:
.Bl -tag -width ".Bq Er DW_DLE_ARGUMENT"
.It Bq Er DW_DLE_ARGUMENT
Either of the arguments
.Ar dbg
or
.Ar die
was NULL.
.It Bq Er DW_DLE_MEMORY
An out of memory condition was encountered during execution.
.El
.Sh SEE ALSO
.Xr dwarf 3 ,
.Xr dwarf_add_AT_dataref 3 ,
.Xr dwarf_add_AT_reference 3 ,
.Xr dwarf_add_AT_signed_const 3 ,
.Xr dwarf_add_AT_unsigned_const 3 ,
.Xr dwarf_new_die 3 ,
.Xr dwarf_producer_init 3 ,
.Xr dwarf_producer_init_b 3