dwarf_formblock(3) [freebsd man page]

DWARF_FORMBLOCK(3)					   BSD Library Functions Manual 					DWARF_FORMBLOCK(3)

NAME

     dwarf_formblock -- return the value of a BLOCK attribute

LIBRARY

     DWARF Access Library (libdwarf, -ldwarf)

SYNOPSIS

     #include <libdwarf.h>

     int
     dwarf_formblock(Dwarf_Attribute attr, Dwarf_Block **ret, Dwarf_Error *err);

DESCRIPTION

     Function dwarf_formblock() sets the location pointed to by argument ret to a pointer to a Dwarf_Block structure containing the value of the
     attribute referenced by argument attr.  The form of argument attr must be one of DW_FORM_block, DW_FORM_block1, DW_FORM_block2 or
     DW_FORM_block4.

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

   Memory Management
     The memory area referenced by the returned pointer is managed by the DWARF(3) library.  The application should not attempt to free this mem-
     ory area.	Portable code may indicate that the memory area is to be freed by by using dwarf_dealloc(3).

RETURN VALUES

     Function dwarf_formblock() returns DW_DLV_OK on success.  In case of an error, it returns DW_DLV_ERROR and sets argument err.

ERRORS

     Function dwarf_formblock() 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_formflag(3), dwarf_formref(3), dwarf_formsdata(3), dwarf_formsig8(3), dwarf_formstring(3), dwarf_formudata(3),
     dwarf_hasattr(3)

BSD
								   July 23, 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