dwarf_formudata(3) [freebsd man page]

DWARF_FORMUDATA(3)					   BSD Library Functions Manual 					DWARF_FORMUDATA(3)

NAME

     dwarf_formudata, dwarf_formsdata -- return the value of a CONSTANT class attribute

LIBRARY

     DWARF Access Library (libdwarf, -ldwarf)

SYNOPSIS

     #include <libdwarf.h>

     int
     dwarf_formudata(Dwarf_Attribute attr, Dwarf_Unsigned *ret, Dwarf_Error *err);

     int
     dwarf_formsdata(Dwarf_Attribute attr, Dwarf_Signed *ret, Dwarf_Error *err);

DESCRIPTION

     These functions return the value associated with a DWARF attribute describing a constant.

     Function dwarf_formudata() sets the location pointed to by argument ret to the value of the attribute referenced by argument attr, treating
     the value as an unsigned quantity.  Argument attr must have one of the following forms: DW_FORM_data1, DW_FORM_data2, DW_FORM_data4,
     DW_FORM_data8 and DW_FORM_udata.

     Function dwarf_formsdata() sets the location pointed to by argument ret to the value of the attribute referenced by argument attr, appropri-
     ately sign extended.  Argument attr must have one of the following forms: DW_FORM_data1, DW_FORM_data2, DW_FORM_data4, DW_FORM_data8 and
     DW_FORM_sdata.

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

RETURN VALUES

     These functions return DW_DLV_OK on success.  In case of an error, they return DW_DLV_ERROR and set argument err.

ERRORS

     These functions may fail with the following errors:

     [DW_DLE_ARGUMENT]	     Either of arguments attr or ret was NULL.

     [DW_DLE_ATTR_FORM_BAD]  The attribute referenced by argument attr was not of a permitted kind.

SEE ALSO

     dwarf(3), dwarf_attr(3), dwarf_formblock(3), dwarf_formflag(3), dwarf_formref(3), dwarf_formsig8(3), dwarf_formstring(3), dwarf_hasattr(3)

BSD
								   June 21, 2010							       BSD

DWARF_FORMREF(3)					   BSD Library Functions Manual 					  DWARF_FORMREF(3)

NAME

     dwarf_formref, dwarf_global_formref -- retrieve offsets for REFERENCE class attributes

LIBRARY

     DWARF Access Library (libdwarf, -ldwarf)

SYNOPSIS

     #include <libdwarf.h>

     int
     dwarf_formref(Dwarf_Attribute attr, Dwarf_Off *retoffset, Dwarf_Error *err);

     int
     dwarf_global_formref(Dwarf_Attribute attr, Dwarf_Off *retoffset, Dwarf_Error *err);

DESCRIPTION

     These functions return the offsets associated with a DWARF attribute descriptor.

     Function dwarf_formref() returns the compilation unit relative offset of the descriptor referenced by argument attr in the location pointed
     to by argument retoffset.	Argument attr must be a reference that is local to a compilation unit.	Permitted forms for argument attr are
     DW_FORM_ref1, DW_FORM_ref2, DW_FORM_ref4, DW_FORM_ref8 and DW_FORM_ref_udata.

     Function dwarf_global_formref() returns the section-relative offset of the descriptor referenced by argument attr in the location pointed to
     by argument retoffset.  Argument attr should be a legal REFERENCE class form.  Permitted forms for argument attr are: DW_FORM_ref_addr,
     DW_FORM_ref_udata, DW_FORM_ref1, DW_FORM_ref2, DW_FORM_ref4, DW_FORM_ref8 and DW_FORM_sec_offset.	The returned offset is relative to the
     start of the ``.debug_info'' ELF section.

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

RETURN VALUES

     These functions return DW_DLV_OK on success.  In case of an error, these functions return DW_DLV_ERROR and sets argument err.

ERRORS

     These functions may fail with the following errors:

     [DW_DLE_ARGUMENT]	     Either of arguments attr or retoffset was NULL.

     [DW_DLE_ATTR_FORM_BAD]  The attribute referenced by argument attr was not of a permitted kind.

SEE ALSO

     dwarf(3), dwarf_attr(3), dwarf_formblock(3), dwarf_formflag(3), dwarf_formsdata(3), dwarf_formsig8(3), dwarf_formstring(3),
     dwarf_formudata(3), dwarf_hasattr(3)

BSD
								   June 21, 2010							       BSD