xref: /freebsd-src/contrib/elftoolchain/libdwarf/dwarf_add_AT_signed_const.3 (revision ae500c1ff8974130f7f2692772cf288b90349e0d)

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.\" $Id: dwarf_add_AT_signed_const.3 3640 2018-10-14 14:09:13Z jkoshy $
.\"
.Dd September 4, 2011
.Dt DWARF_ADD_AT_SIGNED_CONST 3
.Os
.Sh NAME
.Nm dwarf_add_AT_signed_const ,
.Nm dwarf_add_AT_unsigned_const
.Nd create and attach constant class attributes
.Sh LIBRARY
.Lb libdwarf
.Sh SYNOPSIS
.In libdwarf.h
.Ft Dwarf_P_Attribute
.Fo dwarf_add_AT_signed_const
.Fa "Dwarf_P_Debug dbg"
.Fa "Dwarf_P_Die die"
.Fa "Dwarf_Half attr"
.Fa "Dwarf_Signed value"
.Fa "Dwarf_Error *err"
.Fc
.Ft Dwarf_P_Attribute
.Fo dwarf_add_AT_unsigned_const
.Fa "Dwarf_P_Debug dbg"
.Fa "Dwarf_P_Die die"
.Fa "Dwarf_Half attr"
.Fa "Dwarf_Unsigned value"
.Fa "Dwarf_Error *err"
.Fc
.Sh DESCRIPTION
These functions create attribute descriptors belonging to the
.Sq constant
class
and attach them to the debugging information entry referenced by
argument
.Ar die .
.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 descriptor.
.Pp
Function
.Fn dwarf_add_AT_signed_const
creates an attribute descriptor with the signed value specified in
argument
.Ar value .
.Pp
Function
.Fn dwarf_add_AT_unsigned_const
creates an attribute descriptor with the unsigned value specified in
argument
.Ar value .
.Pp
The attribute created by these function will have one of the
DWARF forms
.Dv DW_FORM_data1 ,
.Dv DW_FORM_data2 ,
.Dv DW_FORM_data4
or
.Dv DW_FORM_data8 ,
depending on the size of the value specified in argument
.Ar value .
.Pp
If argument
.Ar err
is not NULL, it will be used by these functions to store error
information in case of an error.
.Sh RETURN VALUES
On success, these functions return the created attribute descriptor.
In case of an error, these functions return
.Dv DW_DLV_BADADDR
and set the argument
.Ar err .
.Sh ERRORS
These functions 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_const_value_signedint 3 ,
.Xr dwarf_add_AT_const_value_unsignedint 3 ,
.Xr dwarf_add_AT_dataref 3 ,
.Xr dwarf_add_AT_ref_address 3 ,
.Xr dwarf_add_AT_targ_address_b 3 ,
.Xr dwarf_new_die 3 ,
.Xr dwarf_producer_init 3 ,
.Xr dwarf_producer_init_b 3