1*0a6a1f1dSLionel Sambuc.\" $NetBSD: dwarf_formudata.3,v 1.2 2014/03/09 16:58:03 christos Exp $ 2*0a6a1f1dSLionel Sambuc.\" 3*0a6a1f1dSLionel Sambuc.\" Copyright (c) 2010 Joseph Koshy 4*0a6a1f1dSLionel Sambuc.\" All rights reserved. 5*0a6a1f1dSLionel Sambuc.\" 6*0a6a1f1dSLionel Sambuc.\" Redistribution and use in source and binary forms, with or without 7*0a6a1f1dSLionel Sambuc.\" modification, are permitted provided that the following conditions 8*0a6a1f1dSLionel Sambuc.\" are met: 9*0a6a1f1dSLionel Sambuc.\" 1. Redistributions of source code must retain the above copyright 10*0a6a1f1dSLionel Sambuc.\" notice, this list of conditions and the following disclaimer. 11*0a6a1f1dSLionel Sambuc.\" 2. Redistributions in binary form must reproduce the above copyright 12*0a6a1f1dSLionel Sambuc.\" notice, this list of conditions and the following disclaimer in the 13*0a6a1f1dSLionel Sambuc.\" documentation and/or other materials provided with the distribution. 14*0a6a1f1dSLionel Sambuc.\" 15*0a6a1f1dSLionel Sambuc.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16*0a6a1f1dSLionel Sambuc.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17*0a6a1f1dSLionel Sambuc.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18*0a6a1f1dSLionel Sambuc.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19*0a6a1f1dSLionel Sambuc.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20*0a6a1f1dSLionel Sambuc.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21*0a6a1f1dSLionel Sambuc.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22*0a6a1f1dSLionel Sambuc.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23*0a6a1f1dSLionel Sambuc.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24*0a6a1f1dSLionel Sambuc.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25*0a6a1f1dSLionel Sambuc.\" SUCH DAMAGE. 26*0a6a1f1dSLionel Sambuc.\" 27*0a6a1f1dSLionel Sambuc.\" Id: dwarf_formudata.3 2073 2011-10-27 03:30:47Z jkoshy 28*0a6a1f1dSLionel Sambuc.\" 29*0a6a1f1dSLionel Sambuc.Dd June 21, 2010 30*0a6a1f1dSLionel Sambuc.Os 31*0a6a1f1dSLionel Sambuc.Dt DWARF_FORMUDATA 3 32*0a6a1f1dSLionel Sambuc.Sh NAME 33*0a6a1f1dSLionel Sambuc.Nm dwarf_formudata , 34*0a6a1f1dSLionel Sambuc.Nm dwarf_formsdata 35*0a6a1f1dSLionel Sambuc.Nd return the value of a CONSTANT class attribute 36*0a6a1f1dSLionel Sambuc.Sh LIBRARY 37*0a6a1f1dSLionel Sambuc.Lb libdwarf 38*0a6a1f1dSLionel Sambuc.Sh SYNOPSIS 39*0a6a1f1dSLionel Sambuc.In libdwarf.h 40*0a6a1f1dSLionel Sambuc.Ft int 41*0a6a1f1dSLionel Sambuc.Fo dwarf_formudata 42*0a6a1f1dSLionel Sambuc.Fa "Dwarf_Attribute attr" 43*0a6a1f1dSLionel Sambuc.Fa "Dwarf_Unsigned *ret" 44*0a6a1f1dSLionel Sambuc.Fa "Dwarf_Error *err" 45*0a6a1f1dSLionel Sambuc.Fc 46*0a6a1f1dSLionel Sambuc.Ft int 47*0a6a1f1dSLionel Sambuc.Fo dwarf_formsdata 48*0a6a1f1dSLionel Sambuc.Fa "Dwarf_Attribute attr" 49*0a6a1f1dSLionel Sambuc.Fa "Dwarf_Signed *ret" 50*0a6a1f1dSLionel Sambuc.Fa "Dwarf_Error *err" 51*0a6a1f1dSLionel Sambuc.Fc 52*0a6a1f1dSLionel Sambuc.Sh DESCRIPTION 53*0a6a1f1dSLionel SambucThese functions return the value associated with a DWARF attribute 54*0a6a1f1dSLionel Sambucdescribing a constant. 55*0a6a1f1dSLionel Sambuc.Pp 56*0a6a1f1dSLionel SambucFunction 57*0a6a1f1dSLionel Sambuc.Fn dwarf_formudata 58*0a6a1f1dSLionel Sambucsets the location pointed to by argument 59*0a6a1f1dSLionel Sambuc.Ar ret 60*0a6a1f1dSLionel Sambucto the value of the attribute referenced by argument 61*0a6a1f1dSLionel Sambuc.Ar attr , 62*0a6a1f1dSLionel Sambuctreating the value as an unsigned quantity. 63*0a6a1f1dSLionel SambucArgument 64*0a6a1f1dSLionel Sambuc.Ar attr 65*0a6a1f1dSLionel Sambucmust have one of the following forms: 66*0a6a1f1dSLionel Sambuc.Dv DW_FORM_data1 , 67*0a6a1f1dSLionel Sambuc.Dv DW_FORM_data2 , 68*0a6a1f1dSLionel Sambuc.Dv DW_FORM_data4 , 69*0a6a1f1dSLionel Sambuc.Dv DW_FORM_data8 70*0a6a1f1dSLionel Sambucand 71*0a6a1f1dSLionel Sambuc.Dv DW_FORM_udata . 72*0a6a1f1dSLionel Sambuc.Pp 73*0a6a1f1dSLionel SambucFunction 74*0a6a1f1dSLionel Sambuc.Fn dwarf_formsdata 75*0a6a1f1dSLionel Sambucsets the location pointed to by argument 76*0a6a1f1dSLionel Sambuc.Ar ret 77*0a6a1f1dSLionel Sambucto the value of the attribute referenced by argument 78*0a6a1f1dSLionel Sambuc.Ar attr , 79*0a6a1f1dSLionel Sambucappropriately sign extended. 80*0a6a1f1dSLionel SambucArgument 81*0a6a1f1dSLionel Sambuc.Ar attr 82*0a6a1f1dSLionel Sambucmust have one of the following forms: 83*0a6a1f1dSLionel Sambuc.Dv DW_FORM_data1 , 84*0a6a1f1dSLionel Sambuc.Dv DW_FORM_data2 , 85*0a6a1f1dSLionel Sambuc.Dv DW_FORM_data4 , 86*0a6a1f1dSLionel Sambuc.Dv DW_FORM_data8 87*0a6a1f1dSLionel Sambucand 88*0a6a1f1dSLionel Sambuc.Dv DW_FORM_sdata . 89*0a6a1f1dSLionel Sambuc.Pp 90*0a6a1f1dSLionel SambucIf argument 91*0a6a1f1dSLionel Sambuc.Ar err 92*0a6a1f1dSLionel Sambucis not NULL, it will be used to return an error descriptor in case 93*0a6a1f1dSLionel Sambucof an error. 94*0a6a1f1dSLionel Sambuc.Sh RETURN VALUES 95*0a6a1f1dSLionel SambucThese functions return 96*0a6a1f1dSLionel Sambuc.Dv DW_DLV_OK 97*0a6a1f1dSLionel Sambucon success. 98*0a6a1f1dSLionel SambucIn case of an error, they return 99*0a6a1f1dSLionel Sambuc.Dv DW_DLV_ERROR 100*0a6a1f1dSLionel Sambucand set argument 101*0a6a1f1dSLionel Sambuc.Ar err . 102*0a6a1f1dSLionel Sambuc.Sh ERRORS 103*0a6a1f1dSLionel SambucThese functions may fail with the following errors: 104*0a6a1f1dSLionel Sambuc.Bl -tag -width ".Bq Er DW_DLE_ATTR_FORM_BAD" 105*0a6a1f1dSLionel Sambuc.It Bq Er DW_DLE_ARGUMENT 106*0a6a1f1dSLionel SambucEither of arguments 107*0a6a1f1dSLionel Sambuc.Ar attr 108*0a6a1f1dSLionel Sambucor 109*0a6a1f1dSLionel Sambuc.Ar ret 110*0a6a1f1dSLionel Sambucwas NULL. 111*0a6a1f1dSLionel Sambuc.It Bq Er DW_DLE_ATTR_FORM_BAD 112*0a6a1f1dSLionel SambucThe attribute referenced by argument 113*0a6a1f1dSLionel Sambuc.Ar attr 114*0a6a1f1dSLionel Sambucwas not of a permitted kind. 115*0a6a1f1dSLionel Sambuc.El 116*0a6a1f1dSLionel Sambuc.Sh SEE ALSO 117*0a6a1f1dSLionel Sambuc.Xr dwarf 3 , 118*0a6a1f1dSLionel Sambuc.Xr dwarf_attr 3 , 119*0a6a1f1dSLionel Sambuc.Xr dwarf_formblock 3 , 120*0a6a1f1dSLionel Sambuc.Xr dwarf_formflag 3 , 121*0a6a1f1dSLionel Sambuc.Xr dwarf_formref 3 , 122*0a6a1f1dSLionel Sambuc.Xr dwarf_formsig8 3 , 123*0a6a1f1dSLionel Sambuc.Xr dwarf_formstring 3 , 124*0a6a1f1dSLionel Sambuc.Xr dwarf_hasattr 3 125